aboutsummaryrefslogtreecommitdiff
path: root/gdb/remote.c
diff options
context:
space:
mode:
authorPedro Alves <palves@redhat.com>2008-10-10 14:46:31 +0000
committerPedro Alves <palves@redhat.com>2008-10-10 14:46:31 +0000
commit5fe04517827cff6e81ab03e4e1f1450ddc24668f (patch)
tree2e8b849d3f3578ef6dbcc09c1b29e34388a9bd81 /gdb/remote.c
parent9b710a42944c3979ed9c8fae8b163ec5353f9c47 (diff)
downloadgdb-5fe04517827cff6e81ab03e4e1f1450ddc24668f.zip
gdb-5fe04517827cff6e81ab03e4e1f1450ddc24668f.tar.gz
gdb-5fe04517827cff6e81ab03e4e1f1450ddc24668f.tar.bz2
* remote.c (remote_start_remote): Always tell the stub if we're in
extended-remote.
Diffstat (limited to 'gdb/remote.c')
-rw-r--r--gdb/remote.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/gdb/remote.c b/gdb/remote.c
index 473dc8e..4196a2f 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -2419,6 +2419,13 @@ remote_start_remote (struct ui_out *uiout, void *opaque)
rs->noack_mode = 1;
}
+ if (args->extended_p)
+ {
+ /* Tell the remote that we are using the extended protocol. */
+ putpkt ("!");
+ getpkt (&rs->buf, &rs->buf_size, 0);
+ }
+
/* Next, if the target can specify a description, read it. We do
this before anything involving memory or registers. */
target_find_description ();
@@ -2482,13 +2489,6 @@ remote_start_remote (struct ui_out *uiout, void *opaque)
immediate_quit--;
start_remote (args->from_tty); /* Initialize gdb process mechanisms. */
- if (args->extended_p)
- {
- /* Tell the remote that we are using the extended protocol. */
- putpkt ("!");
- getpkt (&rs->buf, &rs->buf_size, 0);
- }
-
/* If we connected to a live target, do some additional setup. */
if (target_has_execution)
{
>198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339 5340 5341 5342 5343 5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362 5363 5364 5365 5366 5367 5368 5369 5370 5371 5372 5373 5374 5375 5376 5377 5378 5379 5380 5381 5382 5383 5384 5385 5386 5387 5388 5389 5390 5391 5392 5393 5394 5395 5396 5397 5398 5399 5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418 5419 5420 5421 5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439 5440 5441 5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455 5456 5457 5458 5459 5460 5461 5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473 5474 5475 5476 5477 5478 5479 5480 5481 5482 5483 5484 5485 5486 5487 5488 5489 5490 5491 5492 5493 5494 5495 5496 5497 5498 5499 5500 5501 5502 5503 5504 5505 5506 5507 5508 5509 5510 5511 5512 5513 5514 5515 5516 5517 5518 5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569 5570 5571 5572 5573 5574 5575 5576 5577 5578 5579 5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598 5599 5600 5601 5602 5603 5604 5605 5606 5607 5608 5609 5610 5611 5612 5613 5614 5615 5616 5617 5618 5619 5620 5621 5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636 5637 5638 5639 5640 5641 5642 5643 5644 5645 5646 5647 5648 5649 5650 5651 5652 5653 5654 5655 5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669 5670 5671 5672 5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688 5689 5690 5691 5692 5693 5694 5695 5696 5697 5698 5699 5700 5701 5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713 5714 5715 5716 5717 5718 5719 5720 5721 5722 5723 5724 5725 5726 5727 5728 5729 5730 5731 5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782 5783 5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 5816 5817 5818 5819 5820 5821 5822 5823 5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853 5854 5855 5856 5857 5858 5859 5860 5861 5862 5863 5864 5865 5866 5867 5868 5869 5870 5871 5872 5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883 5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905 5906 5907 5908 5909 5910 5911 5912 5913 5914 5915 5916 5917 5918 5919 5920 5921 5922 5923 5924 5925 5926 5927 5928 5929 5930 5931 5932 5933 5934 5935 5936 5937 5938 5939 5940 5941 5942 5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954 5955 5956 5957 5958 5959 5960 5961 5962 5963 5964 5965 5966 5967 5968 5969 5970 5971 5972 5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983 5984 5985 5986 5987 5988 5989 5990 5991 5992 5993 5994 5995 5996 5997 5998 5999 6000 6001 6002 6003 6004 6005 6006 6007 6008 6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019 6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080 6081 6082 6083 6084 6085 6086 6087 6088 6089 6090 6091 6092 6093 6094 6095 6096 6097 6098 6099 6100 6101 6102 6103 6104 6105 6106 6107 6108 6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146 6147 6148 6149 6150 6151 6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 6176 6177 6178 6179 6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194 6195 6196 6197 6198 6199 6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243 6244 6245 6246 6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284 6285 6286 6287 6288 6289 6290 6291 6292 6293 6294 6295 6296 6297 6298 6299 6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6323 6324 6325 6326 6327 6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375 6376 6377 6378 6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397 6398 6399 6400 6401 6402 6403 6404 6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426 6427 6428 6429 6430 6431 6432 6433 6434 6435 6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467 6468 6469 6470 6471 6472 6473 6474 6475 6476 6477 6478 6479 6480 6481 6482 6483 6484 6485 6486 6487 6488 6489 6490 6491 6492 6493 6494 6495 6496 6497 6498 6499 6500 6501 6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530 6531 6532 6533 6534 6535 6536 6537 6538 6539 6540 6541 6542 6543 6544 6545 6546 6547 6548 6549 6550 6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584 6585 6586 6587 6588 6589 6590 6591 6592 6593 6594 6595 6596 6597 6598 6599 6600 6601 6602 6603 6604 6605 6606 6607 6608 6609 6610 6611 6612 6613 6614 6615 6616 6617 6618 6619 6620 6621 6622 6623 6624 6625 6626 6627 6628 6629 6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649 6650 6651 6652 6653 6654 6655 6656 6657 6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668 6669 6670 6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681 6682 6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693 6694 6695 6696 6697 6698 6699 6700 6701 6702 6703 6704 6705 6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716 6717 6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775 6776 6777 6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788 6789 6790 6791 6792 6793 6794 6795 6796 6797 6798 6799 6800 6801 6802 6803 6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814 6815 6816 6817 6818 6819 6820 6821 6822 6823 6824 6825 6826 6827 6828 6829 6830 6831 6832 6833 6834 6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854 6855 6856 6857 6858 6859 6860 6861 6862 6863 6864 6865 6866 6867 6868 6869 6870 6871 6872 6873 6874 6875 6876 6877 6878 6879 6880 6881 6882 6883 6884 6885 6886 6887 6888 6889 6890 6891 6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913 6914 6915 6916 6917 6918 6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931 6932 6933 6934 6935 6936 6937 6938 6939 6940 6941 6942 6943 6944 6945 6946 6947 6948 6949 6950 6951 6952 6953 6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988 6989 6990 6991 6992 6993 6994 6995 6996 6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008 7009 7010 7011 7012 7013 7014 7015 7016 7017 7018 7019 7020 7021 7022 7023 7024 7025 7026 7027 7028 7029 7030 7031 7032 7033 7034 7035 7036 7037 7038 7039 7040 7041 7042 7043 7044 7045 7046 7047 7048 7049 7050 7051 7052 7053 7054 7055 7056 7057 7058 7059 7060 7061 7062 7063 7064 7065 7066 7067 7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079 7080 7081 7082 7083 7084 7085 7086 7087 7088 7089 7090 7091 7092 7093 7094 7095 7096 7097 7098 7099 7100 7101 7102 7103 7104 7105 7106 7107 7108 7109 7110 7111 7112 7113 7114 7115 7116 7117 7118 7119 7120 7121 7122 7123 7124 7125 7126 7127 7128 7129 7130 7131 7132 7133 7134 7135 7136 7137 7138 7139 7140 7141 7142 7143 7144 7145 7146 7147 7148 7149 7150 7151 7152 7153 7154 7155 7156 7157 7158 7159 7160 7161 7162 7163 7164 7165 7166 7167 7168 7169 7170 7171 7172 7173 7174 7175 7176 7177 7178 7179 7180 7181 7182 7183 7184 7185 7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196 7197 7198 7199 7200 7201 7202 7203 7204 7205 7206 7207 7208 7209 7210 7211 7212 7213 7214 7215 7216 7217 7218 7219 7220 7221 7222 7223 7224 7225 7226 7227 7228 7229 7230 7231 7232 7233 7234 7235 7236 7237 7238 7239 7240 7241 7242 7243 7244 7245 7246 7247 7248 7249 7250 7251 7252 7253 7254 7255 7256 7257 7258 7259 7260 7261 7262 7263 7264 7265 7266 7267 7268 7269 7270 7271 7272 7273 7274 7275 7276 7277 7278 7279 7280 7281 7282 7283 7284 7285 7286 7287 7288 7289 7290 7291 7292 7293 7294 7295 7296 7297 7298 7299 7300 7301 7302 7303 7304 7305 7306 7307 7308 7309 7310 7311 7312 7313 7314 7315 7316 7317 7318 7319 7320 7321 7322 7323 7324 7325 7326 7327 7328 7329 7330 7331 7332 7333 7334 7335 7336 7337 7338 7339 7340 7341 7342 7343 7344 7345 7346 7347 7348 7349 7350 7351 7352 7353 7354 7355 7356 7357 7358 7359 7360 7361 7362 7363 7364 7365 7366 7367 7368 7369 7370 7371 7372 7373 7374 7375 7376 7377 7378 7379 7380 7381 7382 7383 7384 7385 7386 7387 7388 7389 7390 7391 7392 7393 7394 7395 7396 7397 7398 7399 7400 7401 7402 7403 7404 7405 7406 7407 7408 7409 7410 7411 7412 7413 7414 7415 7416 7417 7418 7419 7420 7421 7422 7423 7424 7425 7426 7427 7428 7429 7430 7431 7432 7433 7434 7435 7436 7437 7438 7439 7440 7441 7442 7443 7444 7445 7446 7447 7448 7449 7450 7451 7452 7453 7454 7455 7456 7457 7458 7459 7460 7461 7462 7463 7464 7465 7466 7467 7468 7469 7470 7471 7472 7473 7474 7475 7476 7477 7478 7479 7480 7481 7482 7483 7484 7485 7486 7487 7488 7489 7490 7491 7492 7493 7494 7495 7496 7497 7498 7499 7500 7501 7502 7503 7504 7505 7506 7507 7508 7509 7510 7511 7512 7513 7514 7515 7516 7517 7518 7519 7520 7521 7522 7523 7524 7525 7526 7527 7528 7529 7530 7531 7532 7533 7534 7535 7536 7537 7538 7539 7540 7541 7542 7543 7544 7545 7546 7547 7548 7549 7550 7551 7552 7553 7554 7555 7556 7557 7558 7559 7560 7561 7562 7563 7564 7565 7566 7567 7568 7569 7570 7571 7572 7573 7574 7575 7576 7577 7578 7579 7580 7581 7582 7583 7584 7585 7586 7587 7588 7589 7590 7591 7592 7593 7594 7595 7596 7597 7598 7599 7600 7601 7602 7603 7604 7605 7606 7607 7608 7609 7610 7611 7612 7613 7614 7615 7616 7617 7618 7619 7620 7621 7622 7623 7624 7625 7626 7627 7628 7629 7630 7631 7632 7633 7634 7635 7636 7637 7638 7639 7640 7641 7642 7643 7644 7645 7646 7647 7648 7649 7650 7651 7652 7653 7654 7655 7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670 7671 7672 7673 7674 7675 7676 7677 7678 7679 7680 7681 7682 7683 7684 7685 7686 7687 7688 7689 7690 7691 7692 7693 7694 7695 7696 7697 7698 7699 7700 7701 7702 7703 7704 7705 7706 7707 7708 7709 7710 7711 7712 7713 7714 7715 7716 7717 7718 7719 7720 7721 7722 7723 7724 7725 7726 7727 7728 7729 7730 7731 7732 7733 7734 7735 7736 7737 7738 7739 7740 7741 7742 7743 7744 7745 7746 7747 7748 7749 7750 7751 7752 7753 7754 7755 7756 7757 7758 7759 7760 7761 7762 7763 7764 7765 7766 7767 7768 7769 7770 7771 7772 7773 7774 7775 7776 7777 7778 7779 7780 7781 7782 7783 7784 7785 7786 7787 7788 7789 7790 7791 7792 7793 7794 7795 7796 7797 7798 7799 7800 7801 7802 7803 7804 7805 7806 7807 7808 7809 7810 7811 7812 7813 7814 7815 7816 7817 7818 7819 7820 7821 7822 7823 7824 7825 7826 7827 7828 7829 7830 7831 7832 7833 7834 7835 7836 7837 7838 7839 7840 7841 7842 7843 7844 7845 7846 7847 7848 7849 7850 7851 7852 7853 7854 7855 7856 7857 7858 7859 7860 7861 7862 7863 7864 7865 7866 7867 7868 7869 7870 7871 7872 7873 7874 7875 7876 7877 7878 7879 7880 7881 7882 7883 7884 7885 7886 7887 7888 7889 7890 7891 7892 7893 7894 7895 7896 7897 7898 7899 7900 7901 7902 7903 7904 7905 7906 7907 7908 7909 7910 7911 7912 7913 7914 7915 7916 7917 7918 7919 7920 7921 7922 7923 7924 7925 7926 7927 7928 7929 7930 7931 7932 7933 7934 7935 7936 7937 7938 7939 7940 7941 7942 7943 7944 7945 7946 7947 7948 7949 7950 7951 7952 7953 7954 7955 7956 7957 7958 7959 7960 7961 7962 7963 7964 7965 7966 7967 7968 7969 7970 7971 7972 7973 7974 7975 7976 7977 7978 7979 7980 7981 7982 7983 7984 7985 7986 7987 7988 7989 7990 7991 7992 7993 7994 7995 7996 7997 7998 7999 8000 8001 8002 8003 8004 8005 8006 8007 8008 8009 8010 8011 8012 8013 8014 8015 8016 8017 8018 8019 8020 8021 8022 8023 8024 8025 8026 8027 8028 8029 8030 8031 8032 8033 8034 8035 8036 8037 8038 8039 8040 8041 8042 8043 8044 8045 8046 8047 8048 8049 8050 8051 8052 8053 8054 8055 8056 8057 8058 8059 8060 8061 8062 8063 8064 8065 8066 8067 8068 8069 8070 8071 8072 8073 8074 8075 8076 8077 8078 8079 8080 8081 8082 8083 8084 8085 8086 8087 8088 8089 8090 8091 8092 8093 8094 8095 8096 8097 8098 8099 8100 8101 8102 8103 8104 8105 8106 8107 8108 8109 8110 8111 8112 8113 8114 8115 8116 8117 8118 8119 8120 8121 8122 8123 8124 8125 8126 8127 8128 8129 8130 8131 8132 8133 8134 8135 8136 8137 8138 8139 8140 8141 8142 8143 8144 8145 8146 8147 8148 8149 8150 8151 8152 8153 8154 8155 8156 8157 8158 8159 8160 8161 8162 8163 8164 8165 8166 8167 8168 8169 8170 8171 8172 8173 8174 8175 8176 8177 8178 8179 8180 8181 8182 8183 8184 8185 8186 8187 8188 8189 8190 8191 8192 8193 8194 8195 8196 8197 8198 8199 8200 8201 8202 8203 8204 8205 8206 8207 8208 8209 8210 8211 8212 8213 8214 8215 8216 8217 8218 8219 8220 8221 8222 8223 8224 8225 8226 8227 8228 8229 8230 8231 8232 8233 8234 8235 8236 8237 8238 8239 8240 8241 8242 8243 8244 8245 8246 8247 8248 8249 8250 8251 8252 8253 8254 8255 8256 8257 8258 8259 8260 8261 8262 8263 8264 8265 8266 8267 8268 8269 8270 8271 8272 8273 8274 8275 8276 8277 8278 8279 8280 8281 8282 8283 8284 8285 8286 8287 8288 8289 8290 8291 8292 8293 8294 8295 8296 8297 8298 8299 8300 8301 8302 8303 8304 8305 8306 8307 8308 8309 8310 8311 8312 8313 8314 8315 8316 8317 8318 8319 8320 8321 8322 8323 8324 8325 8326 8327 8328 8329 8330 8331 8332 8333 8334 8335 8336 8337 8338 8339 8340 8341 8342 8343 8344 8345 8346 8347 8348 8349 8350 8351 8352 8353 8354 8355 8356 8357 8358 8359 8360 8361 8362 8363 8364 8365 8366 8367 8368 8369 8370 8371 8372 8373 8374 8375 8376 8377 8378 8379 8380 8381 8382 8383 8384 8385 8386 8387 8388 8389 8390 8391 8392 8393 8394 8395 8396 8397 8398 8399 8400 8401 8402 8403 8404 8405 8406 8407 8408 8409 8410 8411 8412 8413 8414 8415 8416 8417 8418 8419 8420 8421 8422 8423 8424 8425 8426 8427 8428 8429 8430 8431 8432 8433 8434 8435 8436 8437 8438 8439 8440 8441 8442 8443 8444 8445 8446 8447 8448 8449 8450 8451 8452 8453 8454 8455 8456 8457 8458 8459 8460 8461 8462 8463 8464 8465 8466 8467 8468 8469 8470 8471 8472 8473 8474 8475 8476 8477 8478 8479 8480 8481 8482 8483 8484 8485 8486 8487 8488 8489 8490 8491 8492 8493 8494 8495 8496 8497 8498 8499 8500 8501 8502 8503 8504 8505 8506 8507 8508 8509 8510 8511 8512 8513 8514 8515 8516 8517 8518 8519 8520 8521 8522 8523 8524 8525 8526 8527 8528 8529 8530 8531 8532 8533 8534 8535 8536 8537 8538 8539 8540 8541 8542 8543 8544 8545 8546 8547 8548 8549 8550 8551 8552 8553 8554 8555 8556 8557 8558 8559 8560 8561 8562 8563 8564 8565 8566 8567 8568 8569 8570 8571 8572 8573 8574 8575 8576 8577 8578 8579 8580 8581 8582 8583 8584 8585 8586 8587 8588 8589 8590 8591 8592 8593 8594 8595 8596 8597 8598 8599 8600 8601 8602 8603 8604 8605 8606 8607 8608 8609 8610 8611 8612 8613 8614 8615 8616 8617 8618 8619 8620 8621 8622 8623 8624 8625 8626 8627 8628 8629 8630 8631 8632 8633 8634 8635 8636 8637 8638 8639 8640 8641 8642 8643 8644 8645 8646 8647 8648 8649 8650 8651 8652 8653 8654 8655 8656 8657 8658 8659 8660 8661 8662 8663 8664 8665 8666 8667 8668 8669 8670 8671 8672 8673 8674 8675 8676 8677 8678 8679 8680 8681 8682 8683 8684 8685 8686 8687 8688 8689 8690 8691 8692 8693 8694 8695 8696 8697 8698 8699 8700 8701 8702 8703 8704 8705 8706 8707 8708 8709 8710 8711 8712 8713 8714 8715 8716 8717 8718 8719 8720 8721 8722 8723 8724 8725 8726 8727 8728 8729 8730 8731 8732 8733 8734 8735 8736 8737 8738 8739 8740 8741 8742 8743 8744 8745 8746 8747 8748 8749 8750 8751 8752 8753 8754 8755 8756 8757 8758 8759 8760 8761 8762 8763 8764 8765 8766 8767 8768 8769 8770 8771 8772 8773 8774 8775 8776 8777 8778 8779 8780 8781 8782 8783 8784 8785 8786 8787 8788 8789 8790 8791 8792 8793 8794 8795 8796 8797 8798 8799 8800 8801 8802 8803 8804 8805 8806 8807 8808 8809 8810 8811 8812 8813 8814 8815 8816 8817 8818 8819 8820 8821 8822 8823 8824 8825 8826 8827 8828 8829 8830 8831 8832 8833 8834 8835 8836 8837 8838 8839 8840 8841 8842 8843 8844 8845 8846 8847 8848 8849 8850 8851 8852 8853 8854 8855 8856 8857 8858 8859 8860 8861 8862 8863 8864 8865 8866 8867 8868 8869 8870 8871 8872 8873 8874 8875 8876 8877 8878 8879 8880 8881 8882 8883 8884 8885 8886 8887 8888 8889 8890 8891 8892 8893 8894 8895 8896 8897 8898 8899 8900 8901 8902 8903 8904 8905 8906 8907 8908 8909 8910 8911 8912 8913 8914 8915 8916 8917 8918 8919 8920 8921 8922 8923 8924 8925 8926 8927 8928 8929 8930 8931 8932 8933 8934 8935 8936 8937 8938 8939 8940 8941 8942 8943 8944 8945 8946 8947 8948 8949 8950 8951 8952 8953 8954 8955 8956 8957 8958 8959 8960 8961 8962 8963 8964 8965 8966 8967 8968 8969 8970 8971 8972 8973 8974 8975 8976 8977 8978 8979 8980 8981 8982 8983 8984 8985 8986 8987 8988 8989 8990 8991 8992 8993 8994 8995 8996 8997 8998 8999 9000 9001 9002 9003 9004 9005 9006 9007 9008 9009 9010 9011 9012 9013 9014 9015 9016 9017 9018 9019 9020 9021 9022 9023 9024 9025 9026 9027 9028 9029 9030 9031 9032 9033 9034 9035 9036 9037 9038 9039 9040 9041 9042 9043 9044 9045 9046 9047 9048 9049 9050 9051 9052 9053 9054 9055 9056 9057 9058 9059 9060 9061 9062 9063 9064 9065 9066 9067 9068 9069 9070 9071 9072 9073 9074 9075 9076 9077 9078 9079 9080 9081 9082 9083 9084 9085 9086 9087 9088 9089 9090 9091 9092 9093 9094 9095 9096 9097 9098 9099 9100 9101 9102 9103 9104 9105 9106 9107 9108 9109 9110 9111 9112 9113 9114 9115 9116 9117 9118 9119 9120 9121 9122 9123 9124 9125 9126 9127 9128 9129 9130 9131 9132 9133 9134 9135 9136 9137 9138 9139 9140 9141 9142 9143 9144 9145 9146 9147 9148 9149 9150 9151 9152 9153 9154 9155 9156 9157 9158 9159 9160 9161 9162 9163 9164 9165 9166 9167 9168 9169 9170 9171 9172 9173 9174 9175 9176 9177 9178 9179 9180 9181 9182 9183 9184 9185 9186 9187 9188 9189 9190 9191 9192 9193 9194 9195 9196 9197 9198 9199 9200 9201 9202 9203 9204 9205 9206 9207 9208 9209 9210 9211 9212 9213 9214 9215 9216 9217 9218 9219 9220 9221 9222 9223 9224 9225 9226 9227 9228 9229 9230 9231 9232 9233 9234 9235 9236 9237 9238 9239 9240 9241 9242 9243 9244 9245 9246 9247 9248 9249 9250 9251 9252 9253 9254 9255 9256 9257 9258 9259 9260 9261 9262 9263 9264 9265 9266 9267 9268 9269 9270 9271 9272 9273 9274 9275 9276 9277 9278 9279 9280 9281 9282 9283 9284 9285 9286 9287 9288 9289 9290 9291 9292 9293 9294 9295 9296 9297 9298 9299 9300 9301 9302 9303 9304 9305 9306 9307 9308 9309 9310 9311 9312 9313 9314 9315 9316 9317 9318 9319 9320 9321 9322 9323 9324 9325 9326 9327 9328 9329 9330 9331 9332 9333 9334 9335 9336 9337 9338 9339 9340 9341 9342 9343 9344 9345 9346 9347 9348 9349 9350 9351 9352 9353 9354 9355 9356 9357 9358 9359 9360 9361 9362 9363 9364 9365 9366 9367 9368 9369 9370 9371 9372 9373 9374 9375 9376 9377 9378 9379 9380 9381 9382 9383 9384 9385 9386 9387 9388 9389 9390 9391 9392 9393 9394 9395 9396 9397 9398 9399 9400 9401 9402 9403 9404 9405 9406 9407 9408 9409 9410 9411 9412 9413 9414 9415 9416 9417 9418 9419 9420 9421 9422 9423 9424 9425 9426 9427 9428 9429 9430 9431 9432 9433 9434 9435 9436 9437 9438 9439 9440 9441 9442 9443 9444 9445 9446 9447 9448 9449 9450 9451 9452 9453 9454 9455 9456 9457 9458 9459 9460 9461 9462 9463 9464 9465 9466 9467 9468 9469 9470 9471 9472 9473 9474 9475 9476 9477 9478 9479 9480 9481 9482 9483 9484 9485 9486 9487 9488 9489 9490 9491 9492 9493 9494 9495 9496 9497 9498 9499 9500 9501 9502 9503 9504 9505 9506 9507 9508 9509 9510 9511 9512 9513 9514 9515 9516 9517 9518 9519 9520 9521 9522 9523 9524 9525 9526 9527 9528 9529 9530 9531 9532 9533 9534 9535 9536 9537 9538 9539 9540 9541 9542 9543 9544 9545 9546 9547 9548 9549 9550 9551 9552 9553 9554 9555 9556 9557 9558 9559 9560 9561 9562 9563 9564 9565 9566 9567 9568 9569 9570 9571 9572 9573 9574 9575 9576 9577 9578 9579 9580 9581 9582 9583 9584 9585 9586 9587 9588 9589 9590 9591 9592 9593 9594 9595 9596 9597 9598 9599 9600 9601 9602 9603 9604 9605 9606 9607 9608 9609 9610 9611 9612 9613 9614 9615 9616 9617 9618 9619 9620 9621 9622 9623 9624 9625 9626 9627 9628 9629 9630 9631 9632 9633 9634 9635 9636 9637 9638 9639 9640 9641 9642 9643 9644 9645 9646 9647 9648 9649 9650 9651 9652 9653 9654 9655 9656 9657 9658 9659 9660 9661 9662 9663 9664 9665 9666 9667 9668 9669 9670 9671 9672 9673 9674 9675 9676 9677 9678 9679 9680 9681 9682 9683 9684 9685 9686 9687 9688 9689 9690 9691 9692 9693 9694 9695 9696 9697 9698 9699 9700 9701 9702 9703 9704 9705 9706 9707 9708 9709 9710 9711 9712 9713 9714 9715 9716 9717 9718 9719 9720 9721 9722 9723 9724 9725 9726 9727 9728 9729 9730 9731 9732 9733 9734 9735 9736 9737 9738 9739 9740 9741 9742 9743 9744 9745 9746 9747 9748 9749 9750 9751 9752 9753 9754 9755 9756 9757 9758 9759 9760 9761 9762 9763 9764 9765 9766 9767 9768 9769 9770 9771 9772 9773 9774 9775 9776 9777 9778 9779 9780 9781 9782 9783 9784 9785 9786 9787 9788 9789 9790 9791 9792 9793 9794 9795 9796 9797 9798 9799 9800 9801 9802 9803 9804 9805 9806 9807 9808 9809 9810 9811 9812 9813 9814 9815 9816 9817 9818 9819 9820 9821 9822 9823 9824 9825 9826 9827 9828 9829 9830 9831 9832 9833 9834 9835 9836 9837 9838 9839 9840 9841 9842 9843 9844 9845 9846 9847 9848 9849 9850 9851 9852 9853 9854 9855 9856 9857 9858 9859 9860 9861 9862 9863 9864 9865 9866 9867 9868 9869 9870 9871 9872 9873 9874 9875 9876 9877 9878 9879 9880 9881 9882 9883 9884 9885 9886 9887 9888 9889 9890 9891 9892 9893 9894 9895 9896 9897 9898 9899 9900 9901 9902 9903 9904 9905 9906 9907 9908 9909 9910 9911 9912 9913 9914 9915 9916 9917 9918 9919 9920 9921 9922 9923 9924 9925 9926 9927 9928 9929 9930 9931 9932 9933 9934 9935 9936 9937 9938 9939 9940 9941 9942 9943 9944 9945 9946 9947 9948 9949 9950 9951 9952 9953 9954 9955 9956 9957 9958 9959 9960 9961 9962 9963 9964 9965 9966 9967 9968 9969 9970 9971 9972 9973 9974 9975 9976 9977 9978 9979 9980 9981 9982 9983 9984 9985 9986 9987 9988 9989 9990 9991 9992 9993 9994 9995 9996 9997 9998 9999 10000 10001 10002 10003 10004 10005 10006 10007 10008 10009 10010 10011 10012 10013 10014 10015 10016 10017 10018 10019 10020 10021 10022 10023 10024 10025 10026 10027 10028 10029 10030 10031 10032 10033 10034 10035 10036 10037 10038 10039 10040 10041 10042 10043 10044 10045 10046 10047 10048 10049 10050 10051 10052 10053 10054 10055 10056 10057 10058 10059 10060 10061 10062 10063 10064 10065 10066 10067 10068 10069 10070 10071 10072 10073 10074 10075 10076 10077 10078 10079 10080 10081 10082 10083 10084 10085 10086 10087 10088 10089 10090 10091 10092 10093 10094 10095 10096 10097 10098 10099 10100 10101 10102 10103 10104 10105 10106 10107 10108 10109 10110 10111 10112 10113 10114 10115 10116 10117 10118 10119 10120 10121 10122 10123 10124 10125 10126 10127 10128 10129 10130 10131 10132 10133 10134 10135 10136 10137 10138 10139 10140 10141 10142 10143 10144 10145 10146 10147 10148 10149 10150 10151 10152 10153 10154 10155 10156 10157 10158 10159 10160 10161 10162 10163 10164 10165 10166 10167 10168 10169 10170 10171 10172 10173 10174 10175 10176 10177 10178 10179 10180 10181 10182 10183 10184 10185 10186 10187 10188 10189 10190 10191 10192 10193 10194 10195 10196 10197 10198 10199 10200 10201 10202 10203 10204 10205 10206 10207 10208 10209 10210 10211 10212 10213 10214 10215 10216 10217 10218 10219 10220 10221 10222 10223 10224 10225 10226 10227 10228 10229 10230 10231 10232 10233 10234 10235 10236 10237 10238 10239 10240 10241 10242 10243 10244 10245 10246 10247 10248 10249 10250 10251 10252 10253 10254 10255 10256 10257 10258 10259 10260 10261 10262 10263 10264 10265 10266 10267 10268 10269 10270 10271 10272 10273 10274 10275 10276 10277 10278 10279 10280 10281 10282 10283 10284 10285 10286 10287 10288 10289 10290 10291 10292 10293 10294 10295 10296 10297 10298 10299 10300 10301 10302 10303 10304 10305 10306 10307 10308 10309 10310 10311 10312 10313 10314 10315 10316 10317 10318 10319 10320 10321 10322 10323 10324 10325 10326 10327 10328 10329 10330 10331 10332 10333 10334 10335 10336 10337 10338 10339 10340 10341 10342 10343 10344 10345 10346 10347 10348 10349 10350 10351 10352 10353 10354 10355 10356 10357 10358 10359 10360 10361 10362 10363 10364 10365 10366 10367 10368 10369 10370 10371 10372 10373 10374 10375 10376 10377 10378 10379 10380 10381 10382 10383 10384 10385 10386 10387 10388 10389 10390 10391 10392 10393 10394 10395 10396 10397 10398 10399 10400 10401 10402 10403 10404 10405 10406 10407 10408 10409 10410 10411 10412 10413 10414 10415 10416 10417 10418 10419 10420 10421 10422 10423 10424 10425 10426 10427 10428 10429 10430 10431 10432 10433 10434 10435 10436 10437 10438 10439 10440 10441 10442 10443 10444 10445 10446 10447 10448 10449 10450 10451 10452 10453 10454 10455 10456 10457 10458 10459 10460 10461 10462 10463 10464 10465 10466 10467 10468 10469 10470 10471 10472 10473 10474 10475 10476 10477 10478 10479 10480 10481 10482 10483 10484 10485 10486 10487 10488 10489 10490 10491 10492 10493 10494 10495 10496 10497 10498 10499 10500 10501 10502 10503 10504 10505 10506 10507 10508 10509 10510 10511 10512 10513 10514 10515 10516 10517 10518 10519 10520 10521 10522 10523 10524 10525 10526 10527 10528 10529 10530 10531 10532 10533 10534 10535 10536 10537 10538 10539 10540 10541 10542 10543 10544 10545 10546 10547 10548 10549 10550 10551 10552 10553 10554 10555 10556 10557 10558 10559 10560 10561 10562 10563 10564 10565 10566 10567 10568 10569 10570 10571 10572 10573 10574 10575 10576 10577 10578 10579 10580 10581 10582 10583 10584 10585 10586 10587 10588 10589 10590 10591 10592 10593 10594 10595 10596 10597 10598 10599 10600 10601 10602 10603 10604 10605 10606 10607 10608 10609 10610 10611 10612 10613 10614 10615 10616 10617 10618 10619 10620 10621 10622 10623 10624 10625 10626 10627 10628 10629 10630 10631 10632 10633 10634 10635 10636 10637 10638 10639 10640 10641 10642 10643 10644 10645 10646 10647 10648 10649 10650 10651 10652 10653 10654 10655 10656 10657 10658 10659 10660 10661 10662 10663 10664 10665 10666 10667 10668 10669 10670 10671 10672 10673 10674 10675 10676 10677 10678 10679 10680 10681 10682 10683 10684 10685 10686 10687 10688 10689 10690 10691 10692 10693 10694 10695 10696 10697 10698 10699 10700 10701 10702 10703 10704 10705 10706 10707 10708 10709 10710 10711 10712 10713 10714 10715 10716 10717 10718 10719 10720 10721 10722 10723 10724 10725 10726 10727 10728 10729 10730 10731 10732 10733 10734 10735 10736 10737 10738 10739 10740 10741 10742 10743 10744 10745 10746 10747 10748 10749 10750 10751 10752 10753 10754 10755 10756 10757 10758 10759 10760 10761 10762 10763 10764 10765 10766 10767 10768 10769 10770 10771 10772 10773 10774 10775 10776 10777 10778 10779 10780 10781 10782 10783 10784 10785 10786 10787 10788 10789 10790 10791 10792 10793 10794 10795 10796 10797 10798 10799 10800 10801 10802 10803 10804 10805 10806 10807 10808 10809 10810 10811 10812 10813 10814 10815 10816 10817 10818 10819 10820 10821 10822 10823 10824 10825 10826 10827 10828 10829 10830 10831 10832 10833 10834 10835 10836 10837 10838 10839 10840 10841 10842 10843 10844 10845 10846 10847 10848 10849 10850 10851 10852 10853 10854 10855 10856 10857 10858 10859 10860 10861 10862 10863 10864 10865 10866 10867 10868 10869 10870 10871 10872 10873 10874 10875 10876 10877 10878 10879 10880 10881 10882 10883 10884 10885 10886 10887 10888 10889 10890 10891 10892 10893 10894 10895 10896 10897 10898 10899 10900 10901 10902 10903 10904 10905 10906 10907 10908 10909 10910 10911 10912 10913 10914 10915 10916 10917 10918 10919 10920 10921 10922 10923 10924 10925 10926 10927 10928 10929 10930 10931 10932 10933 10934 10935 10936 10937 10938 10939 10940 10941 10942 10943 10944 10945 10946 10947 10948 10949 10950 10951 10952 10953 10954 10955 10956 10957 10958 10959 10960 10961 10962 10963 10964 10965 10966 10967 10968 10969 10970 10971 10972 10973 10974 10975 10976 10977 10978 10979 10980 10981 10982 10983 10984 10985 10986 10987 10988 10989 10990 10991 10992 10993 10994 10995 10996 10997 10998 10999 11000 11001 11002 11003 11004 11005 11006 11007 11008 11009 11010 11011 11012 11013 11014 11015 11016 11017 11018 11019 11020 11021 11022 11023 11024 11025 11026 11027 11028 11029 11030 11031 11032 11033 11034 11035 11036 11037 11038 11039 11040 11041 11042 11043 11044 11045 11046 11047 11048 11049 11050 11051 11052 11053 11054 11055 11056 11057 11058 11059 11060 11061 11062 11063 11064 11065 11066 11067 11068 11069 11070 11071 11072 11073 11074 11075 11076 11077 11078 11079 11080 11081 11082 11083 11084 11085 11086 11087 11088 11089 11090 11091 11092 11093 11094 11095 11096 11097 11098 11099 11100 11101 11102 11103 11104 11105 11106 11107 11108 11109 11110 11111 11112 11113 11114 11115 11116 11117 11118 11119 11120 11121 11122 11123 11124 11125 11126 11127 11128 11129 11130 11131 11132 11133 11134 11135 11136 11137 11138 11139 11140 11141 11142 11143 11144 11145 11146 11147 11148 11149 11150 11151 11152 11153 11154 11155 11156 11157 11158 11159 11160 11161 11162 11163 11164 11165 11166 11167 11168 11169 11170 11171 11172 11173 11174 11175 11176 11177 11178 11179 11180 11181 11182 11183 11184 11185 11186 11187 11188 11189 11190 11191 11192 11193 11194 11195 11196 11197 11198 11199 11200 11201 11202 11203 11204 11205 11206 11207 11208 11209 11210 11211 11212 11213 11214 11215 11216 11217 11218 11219 11220 11221 11222 11223 11224 11225 11226 11227 11228 11229 11230 11231 11232 11233 11234 11235 11236 11237 11238 11239 11240 11241 11242 11243 11244 11245 11246 11247 11248 11249 11250 11251 11252 11253 11254 11255 11256 11257 11258 11259 11260 11261 11262 11263 11264 11265 11266 11267 11268 11269 11270 11271 11272 11273 11274 11275 11276 11277 11278 11279 11280 11281 11282 11283 11284 11285 11286 11287 11288 11289 11290 11291 11292 11293 11294 11295 11296 11297 11298 11299 11300 11301 11302 11303 11304 11305 11306 11307 11308 11309 11310 11311 11312 11313 11314 11315 11316 11317 11318 11319 11320 11321 11322 11323 11324 11325 11326 11327 11328 11329 11330 11331 11332 11333 11334 11335 11336 11337 11338 11339 11340 11341 11342 11343 11344 11345 11346 11347 11348 11349 11350 11351 11352 11353 11354 11355 11356 11357 11358 11359 11360 11361 11362 11363 11364 11365 11366 11367 11368 11369 11370 11371 11372 11373 11374 11375 11376 11377 11378 11379 11380 11381 11382 11383 11384 11385 11386 11387 11388 11389 11390 11391 11392 11393 11394 11395 11396 11397 11398 11399 11400 11401 11402 11403 11404 11405 11406 11407 11408 11409 11410 11411 11412 11413 11414 11415 11416 11417 11418 11419 11420 11421 11422 11423 11424 11425 11426 11427 11428 11429 11430 11431 11432 11433 11434 11435 11436 11437 11438 11439 11440 11441 11442 11443 11444 11445 11446 11447 11448 11449 11450 11451 11452 11453 11454 11455 11456 11457 11458 11459 11460 11461 11462 11463 11464 11465 11466 11467 11468 11469 11470 11471 11472 11473 11474 11475 11476 11477 11478 11479 11480 11481 11482 11483 11484 11485 11486 11487 11488 11489 11490 11491 11492 11493 11494 11495 11496 11497 11498 11499 11500 11501 11502 11503 11504 11505 11506 11507 11508 11509 11510 11511 11512 11513 11514 11515 11516 11517 11518 11519 11520 11521 11522 11523 11524 11525 11526 11527 11528 11529 11530 11531 11532 11533 11534 11535 11536 11537 11538 11539 11540 11541 11542 11543 11544 11545 11546 11547 11548 11549 11550 11551 11552 11553 11554 11555 11556 11557 11558 11559 11560 11561 11562 11563 11564 11565 11566 11567 11568 11569 11570 11571 11572 11573 11574 11575 11576 11577 11578 11579 11580 11581 11582 11583 11584 11585 11586 11587 11588 11589 11590 11591 11592 11593 11594 11595 11596 11597 11598 11599 11600 11601 11602 11603 11604 11605 11606 11607 11608 11609 11610 11611 11612 11613 11614 11615 11616 11617 11618 11619 11620 11621 11622 11623 11624 11625 11626 11627 11628 11629 11630 11631 11632 11633 11634 11635 11636 11637 11638 11639 11640 11641 11642 11643 11644 11645 11646 11647 11648 11649 11650 11651 11652 11653 11654 11655 11656 11657 11658 11659 11660 11661 11662 11663 11664 11665 11666 11667 11668 11669 11670 11671 11672 11673 11674 11675 11676 11677 11678 11679 11680 11681 11682 11683 11684 11685 11686 11687 11688 11689 11690 11691 11692 11693 11694 11695 11696 11697 11698 11699 11700 11701 11702 11703 11704 11705 11706 11707 11708 11709 11710 11711 11712 11713 11714 11715 11716 11717 11718 11719 11720 11721 11722 11723 11724 11725 11726 11727 11728 11729 11730 11731 11732 11733 11734 11735 11736 11737 11738 11739 11740 11741 11742 11743 11744 11745 11746 11747 11748 11749 11750 11751 11752 11753 11754 11755 11756 11757 11758 11759 11760 11761 11762 11763 11764 11765 11766 11767 11768 11769 11770 11771 11772 11773 11774 11775 11776 11777 11778 11779 11780 11781 11782 11783 11784 11785 11786 11787 11788 11789 11790 11791 11792 11793 11794 11795 11796 11797 11798 11799 11800 11801 11802 11803 11804 11805 11806 11807 11808 11809 11810 11811 11812 11813 11814 11815 11816 11817 11818 11819 11820 11821 11822 11823 11824 11825 11826 11827 11828 11829 11830 11831 11832 11833 11834 11835 11836 11837 11838 11839 11840 11841 11842 11843 11844 11845 11846 11847 11848 11849 11850 11851 11852 11853 11854 11855 11856 11857 11858 11859 11860 11861 11862 11863 11864 11865 11866 11867 11868 11869 11870 11871 11872 11873 11874 11875 11876 11877 11878 11879 11880 11881 11882 11883 11884 11885 11886 11887 11888 11889 11890 11891 11892 11893 11894 11895 11896 11897 11898 11899 11900 11901 11902 11903 11904 11905 11906 11907 11908 11909 11910 11911 11912 11913 11914 11915 11916 11917 11918 11919 11920 11921 11922 11923 11924 11925 11926 11927 11928 11929 11930 11931 11932 11933 11934 11935 11936 11937 11938 11939 11940 11941 11942 11943 11944 11945 11946 11947 11948 11949 11950 11951 11952 11953 11954 11955 11956 11957 11958 11959 11960 11961 11962 11963 11964 11965 11966 11967 11968 11969 11970 11971 11972 11973 11974 11975 11976 11977 11978 11979 11980 11981 11982 11983 11984 11985 11986 11987 11988 11989 11990 11991 11992 11993 11994 11995 11996 11997 11998 11999 12000 12001 12002 12003 12004 12005 12006 12007 12008 12009 12010 12011 12012 12013 12014 12015 12016 12017 12018 12019 12020 12021 12022 12023 12024 12025 12026 12027 12028 12029 12030 12031 12032 12033 12034 12035 12036 12037 12038 12039 12040 12041 12042 12043 12044 12045 12046 12047 12048 12049 12050 12051 12052 12053 12054 12055 12056 12057 12058 12059 12060 12061 12062 12063 12064 12065 12066 12067 12068 12069 12070 12071 12072 12073 12074 12075 12076 12077 12078 12079 12080 12081 12082 12083 12084 12085 12086 12087 12088 12089 12090 12091 12092 12093 12094 12095 12096 12097 12098 12099 12100 12101 12102 12103 12104 12105 12106 12107 12108 12109 12110 12111 12112 12113 12114 12115 12116 12117 12118 12119 12120 12121 12122 12123 12124 12125 12126 12127 12128 12129 12130 12131 12132 12133 12134 12135 12136 12137 12138 12139 12140 12141 12142 12143 12144 12145 12146 12147 12148 12149 12150 12151 12152 12153 12154 12155 12156 12157 12158 12159 12160 12161 12162 12163 12164 12165 12166 12167 12168 12169 12170 12171 12172 12173 12174 12175 12176 12177 12178 12179 12180 12181 12182 12183 12184 12185 12186 12187 12188 12189 12190 12191 12192 12193 12194 12195 12196 12197 12198 12199 12200 12201 12202 12203 12204 12205 12206 12207 12208 12209 12210 12211 12212 12213 12214 12215 12216 12217 12218 12219 12220 12221 12222 12223 12224 12225 12226 12227 12228 12229 12230 12231 12232 12233 12234 12235 12236 12237 12238 12239 12240 12241 12242 12243 12244 12245 12246 12247 12248 12249 12250 12251 12252 12253 12254 12255 12256 12257 12258 12259 12260 12261 12262 12263 12264 12265 12266 12267 12268 12269 12270 12271 12272 12273 12274 12275 12276 12277 12278 12279 12280 12281 12282 12283 12284 12285 12286 12287 12288 12289 12290 12291 12292 12293 12294 12295 12296 12297 12298 12299 12300 12301 12302 12303 12304 12305 12306 12307 12308 12309 12310 12311 12312 12313 12314 12315 12316 12317 12318 12319 12320 12321 12322 12323 12324 12325 12326 12327 12328 12329 12330 12331 12332 12333 12334 12335 12336 12337 12338 12339 12340 12341 12342 12343 12344 12345 12346 12347 12348 12349 12350 12351 12352 12353 12354 12355 12356 12357 12358 12359 12360 12361 12362 12363 12364 12365 12366 12367 12368 12369 12370 12371 12372 12373 12374 12375 12376 12377 12378 12379 12380 12381 12382 12383 12384 12385 12386 12387 12388 12389 12390 12391 12392 12393 12394 12395 12396 12397 12398 12399 12400 12401 12402 12403 12404 12405 12406 12407 12408 12409 12410 12411 12412 12413 12414 12415 12416 12417 12418 12419 12420 12421 12422 12423 12424 12425 12426 12427 12428 12429 12430 12431 12432 12433 12434 12435 12436 12437 12438 12439 12440 12441 12442 12443 12444 12445 12446 12447 12448 12449 12450 12451 12452 12453 12454 12455 12456 12457 12458 12459 12460 12461 12462 12463 12464 12465 12466 12467 12468 12469 12470 12471 12472 12473 12474 12475 12476 12477 12478 12479 12480 12481 12482 12483 12484 12485 12486 12487 12488 12489 12490 12491 12492 12493 12494 12495 12496 12497 12498 12499 12500 12501 12502 12503 12504 12505 12506 12507 12508 12509 12510 12511 12512 12513 12514 12515 12516 12517 12518 12519 12520 12521 12522 12523 12524 12525 12526 12527 12528 12529 12530 12531 12532 12533 12534 12535 12536 12537 12538 12539 12540 12541 12542 12543 12544 12545 12546 12547 12548 12549 12550 12551 12552 12553 12554 12555 12556 12557 12558 12559 12560 12561 12562 12563 12564 12565 12566 12567 12568 12569 12570 12571 12572 12573 12574 12575 12576 12577 12578 12579 12580 12581 12582 12583 12584 12585 12586 12587 12588 12589 12590 12591 12592 12593 12594 12595 12596 12597 12598 12599 12600 12601 12602 12603 12604 12605 12606 12607 12608 12609 12610 12611 12612 12613 12614 12615 12616 12617 12618 12619 12620 12621 12622 12623 12624 12625 12626 12627 12628 12629 12630 12631 12632 12633 12634 12635 12636 12637 12638 12639 12640 12641 12642 12643 12644 12645 12646 12647 12648 12649 12650 12651 12652 12653 12654 12655 12656 12657 12658 12659 12660 12661 12662 12663 12664 12665 12666 12667 12668 12669 12670 12671 12672 12673 12674 12675 12676 12677 12678 12679 12680 12681 12682 12683 12684 12685 12686 12687 12688 12689 12690 12691 12692 12693 12694 12695 12696 12697 12698 12699 12700 12701 12702 12703 12704 12705 12706 12707 12708 12709 12710 12711 12712 12713 12714 12715 12716 12717 12718 12719 12720 12721 12722 12723 12724 12725 12726 12727 12728 12729 12730 12731 12732 12733 12734 12735 12736 12737 12738 12739 12740 12741 12742 12743 12744 12745 12746 12747 12748 12749 12750 12751 12752 12753 12754 12755 12756 12757 12758 12759 12760 12761 12762 12763 12764 12765 12766 12767 12768 12769 12770 12771 12772 12773 12774 12775 12776 12777 12778 12779 12780 12781 12782 12783 12784 12785 12786 12787 12788 12789 12790 12791 12792 12793 12794 12795 12796 12797 12798 12799 12800 12801 12802 12803 12804 12805 12806 12807 12808 12809 12810 12811 12812 12813 12814 12815 12816 12817 12818 12819 12820 12821 12822 12823 12824 12825 12826 12827 12828 12829 12830 12831 12832 12833 12834 12835 12836 12837 12838 12839 12840 12841 12842 12843 12844 12845 12846 12847 12848 12849 12850 12851 12852 12853 12854 12855 12856 12857 12858 12859 12860 12861 12862 12863 12864 12865 12866 12867 12868 12869 12870 12871 12872 12873 12874 12875 12876 12877 12878 12879 12880 12881 12882 12883 12884 12885 12886 12887 12888 12889 12890 12891 12892 12893 12894 12895 12896 12897 12898 12899 12900 12901 12902 12903 12904 12905 12906 12907 12908 12909 12910 12911 12912 12913 12914 12915 12916 12917 12918 12919 12920 12921 12922 12923 12924 12925 12926 12927 12928 12929 12930 12931 12932 12933 12934 12935 12936 12937 12938 12939 12940 12941 12942 12943 12944 12945 12946 12947 12948 12949 12950 12951 12952 12953 12954 12955 12956 12957 12958 12959 12960 12961 12962 12963 12964 12965 12966 12967 12968 12969 12970 12971 12972 12973 12974 12975 12976 12977 12978 12979 12980 12981 12982 12983 12984 12985 12986 12987 12988 12989 12990 12991 12992 12993 12994 12995 12996 12997 12998 12999 13000 13001 13002 13003 13004 13005 13006 13007 13008 13009 13010 13011 13012 13013 13014 13015 13016 13017 13018 13019 13020 13021 13022 13023 13024 13025 13026 13027 13028 13029 13030 13031 13032 13033 13034 13035 13036 13037 13038 13039 13040 13041 13042 13043 13044 13045 13046 13047 13048 13049 13050 13051 13052 13053 13054 13055 13056 13057 13058 13059 13060 13061 13062 13063 13064 13065 13066 13067 13068 13069 13070 13071 13072 13073 13074 13075 13076 13077 13078 13079 13080 13081 13082 13083 13084 13085 13086 13087 13088 13089 13090 13091 13092 13093 13094 13095 13096 13097 13098 13099 13100 13101 13102 13103 13104 13105 13106 13107 13108 13109 13110 13111 13112 13113 13114 13115 13116 13117 13118 13119 13120 13121 13122 13123 13124 13125 13126 13127 13128 13129 13130 13131 13132 13133 13134 13135 13136 13137 13138 13139 13140 13141 13142 13143 13144 13145 13146 13147 13148 13149 13150 13151 13152 13153 13154 13155 13156 13157 13158 13159 13160 13161 13162 13163 13164 13165 13166 13167 13168 13169 13170 13171 13172 13173 13174 13175 13176 13177 13178 13179 13180 13181 13182 13183 13184 13185 13186 13187 13188 13189 13190 13191 13192 13193 13194 13195 13196 13197 13198 13199 13200 13201 13202 13203 13204 13205 13206 13207 13208 13209 13210 13211 13212 13213 13214 13215 13216 13217 13218 13219 13220 13221 13222 13223 13224 13225 13226 13227 13228 13229 13230 13231 13232 13233 13234 13235 13236 13237 13238 13239 13240 13241 13242 13243 13244 13245 13246 13247 13248 13249 13250 13251 13252 13253 13254 13255 13256 13257 13258 13259 13260 13261 13262 13263 13264 13265 13266 13267 13268 13269 13270 13271 13272 13273 13274 13275 13276 13277 13278 13279 13280 13281 13282 13283 13284 13285 13286 13287 13288 13289 13290 13291 13292 13293 13294 13295 13296 13297 13298 13299 13300 13301 13302 13303 13304 13305 13306 13307 13308 13309 13310 13311 13312 13313 13314 13315 13316 13317 13318 13319 13320 13321 13322 13323 13324 13325 13326 13327 13328 13329 13330 13331 13332 13333 13334 13335 13336 13337 13338 13339 13340 13341 13342 13343 13344 13345 13346 13347 13348 13349 13350 13351 13352 13353 13354 13355 13356 13357 13358 13359 13360 13361 13362 13363 13364 13365 13366 13367 13368 13369 13370 13371 13372 13373 13374 13375 13376 13377 13378 13379 13380 13381 13382 13383 13384 13385 13386 13387 13388 13389 13390 13391 13392 13393 13394 13395 13396 13397 13398 13399 13400 13401 13402 13403 13404 13405 13406 13407 13408 13409 13410 13411 13412 13413 13414 13415 13416 13417 13418 13419 13420 13421 13422 13423 13424 13425 13426 13427 13428 13429 13430 13431 13432 13433 13434 13435 13436 13437 13438 13439 13440 13441 13442 13443 13444 13445 13446 13447 13448 13449 13450 13451 13452 13453 13454 13455 13456 13457 13458 13459 13460 13461 13462 13463 13464 13465 13466 13467 13468 13469 13470 13471 13472 13473 13474 13475 13476 13477 13478 13479 13480 13481 13482 13483 13484 13485 13486 13487 13488 13489 13490 13491 13492 13493 13494 13495 13496 13497 13498 13499 13500 13501 13502 13503 13504 13505 13506 13507 13508 13509 13510 13511 13512 13513 13514 13515 13516 13517 13518 13519 13520 13521 13522 13523 13524 13525 13526 13527 13528 13529 13530 13531 13532 13533 13534 13535 13536 13537 13538 13539 13540 13541 13542 13543 13544 13545 13546 13547 13548 13549 13550 13551 13552 13553 13554 13555 13556 13557 13558 13559 13560 13561 13562 13563 13564 13565 13566 13567 13568 13569 13570 13571 13572 13573 13574 13575 13576 13577 13578 13579 13580 13581 13582 13583 13584 13585 13586 13587 13588 13589 13590 13591 13592 13593 13594 13595 13596 13597 13598 13599 13600 13601 13602 13603 13604 13605 13606 13607 13608 13609 13610 13611 13612 13613 13614 13615 13616 13617 13618 13619 13620 13621 13622 13623 13624 13625 13626 13627 13628 13629 13630 13631 13632 13633 13634 13635 13636 13637 13638 13639 13640 13641 13642 13643 13644 13645 13646 13647 13648 13649 13650 13651 13652 13653 13654 13655 13656 13657 13658 13659 13660 13661 13662 13663 13664 13665 13666 13667 13668 13669 13670 13671 13672 13673 13674 13675 13676 13677 13678 13679 13680 13681 13682 13683 13684 13685 13686 13687 13688 13689 13690 13691 13692 13693 13694 13695 13696 13697 13698 13699 13700 13701 13702 13703 13704 13705 13706 13707 13708 13709 13710 13711 13712 13713 13714 13715 13716 13717 13718 13719 13720 13721 13722 13723 13724 13725 13726 13727 13728 13729 13730 13731 13732 13733 13734 13735 13736 13737 13738 13739 13740 13741 13742 13743 13744 13745 13746 13747 13748 13749 13750 13751 13752 13753 13754 13755 13756 13757 13758 13759 13760 13761 13762 13763 13764 13765 13766 13767 13768 13769 13770 13771 13772 13773 13774 13775 13776 13777 13778 13779 13780 13781 13782 13783 13784 13785 13786 13787 13788 13789 13790 13791 13792 13793 13794 13795 13796 13797 13798 13799 13800 13801 13802 13803 13804 13805 13806 13807 13808 13809 13810 13811 13812 13813 13814 13815 13816 13817 13818 13819 13820 13821 13822 13823 13824 13825 13826 13827 13828 13829 13830 13831 13832 13833 13834 13835 13836 13837 13838 13839 13840 13841 13842 13843 13844 13845 13846 13847 13848 13849 13850 13851 13852 13853 13854 13855 13856 13857 13858 13859 13860 13861 13862 13863 13864 13865 13866 13867 13868 13869 13870 13871 13872 13873 13874 13875 13876 13877 13878 13879 13880 13881 13882 13883 13884 13885 13886 13887 13888 13889 13890 13891 13892 13893 13894 13895 13896 13897 13898 13899 13900 13901 13902 13903 13904 13905 13906 13907 13908 13909 13910 13911 13912 13913 13914 13915 13916 13917 13918 13919 13920 13921 13922 13923 13924 13925 13926 13927 13928 13929 13930 13931 13932 13933 13934 13935 13936 13937 13938 13939 13940 13941 13942 13943 13944 13945 13946 13947 13948 13949 13950 13951 13952 13953 13954 13955 13956 13957 13958 13959 13960 13961 13962 13963 13964 13965 13966 13967 13968 13969 13970 13971 13972 13973 13974 13975 13976 13977 13978 13979 13980 13981 13982 13983 13984 13985 13986 13987 13988 13989 13990 13991 13992 13993 13994 13995 13996 13997 13998 13999 14000 14001 14002 14003 14004 14005 14006 14007 14008 14009 14010 14011 14012 14013 14014 14015 14016 14017 14018 14019 14020 14021 14022 14023 14024 14025 14026 14027 14028 14029 14030 14031 14032 14033 14034 14035 14036 14037 14038 14039 14040 14041 14042 14043 14044 14045 14046 14047 14048 14049 14050 14051 14052 14053 14054 14055 14056 14057 14058 14059 14060 14061 14062 14063 14064 14065 14066 14067 14068 14069 14070 14071 14072 14073 14074 14075 14076 14077 14078 14079 14080 14081 14082 14083 14084 14085 14086 14087 14088 14089 14090 14091 14092 14093 14094 14095 14096 14097 14098 14099 14100 14101 14102 14103 14104 14105 14106 14107 14108 14109 14110 14111 14112 14113 14114 14115 14116 14117 14118 14119 14120 14121 14122 14123 14124 14125 14126 14127 14128 14129 14130 14131 14132 14133 14134 14135 14136 14137 14138 14139 14140 14141 14142 14143 14144 14145 14146 14147 14148 14149 14150 14151 14152 14153 14154 14155 14156 14157 14158 14159 14160 14161 14162 14163 14164 14165 14166 14167 14168 14169 14170 14171 14172 14173 14174 14175 14176 14177 14178 14179 14180 14181 14182 14183 14184 14185 14186 14187 14188 14189 14190 14191 14192 14193 14194 14195 14196 14197 14198 14199 14200 14201 14202 14203 14204 14205 14206 14207 14208 14209 14210 14211 14212 14213 14214 14215 14216 14217 14218 14219 14220 14221 14222 14223 14224 14225 14226 14227 14228 14229 14230 14231 14232 14233 14234 14235 14236 14237 14238 14239 14240 14241 14242 14243 14244 14245 14246 14247 14248 14249 14250 14251 14252 14253 14254 14255 14256 14257 14258 14259 14260 14261 14262 14263 14264 14265 14266 14267 14268 14269 14270 14271 14272 14273 14274 14275 14276 14277 14278 14279 14280 14281 14282 14283 14284 14285 14286 14287 14288 14289 14290 14291 14292 14293 14294 14295 14296 14297 14298 14299 14300 14301 14302 14303 14304 14305 14306 14307 14308 14309 14310 14311 14312 14313 14314 14315 14316 14317 14318 14319 14320 14321 14322 14323 14324 14325 14326 14327 14328 14329 14330 14331 14332 14333 14334 14335 14336 14337 14338 14339 14340 14341 14342 14343 14344 14345 14346 14347 14348 14349 14350 14351 14352 14353 14354 14355 14356 14357 14358 14359 14360 14361 14362 14363 14364 14365 14366 14367 14368 14369 14370 14371 14372 14373 14374 14375 14376 14377 14378 14379 14380 14381 14382 14383 14384 14385 14386 14387 14388 14389 14390 14391 14392 14393 14394 14395 14396 14397 14398 14399 14400 14401 14402 14403 14404 14405 14406 14407 14408 14409 14410 14411 14412 14413 14414 14415 14416 14417 14418 14419 14420 14421 14422 14423 14424 14425 14426 14427 14428 14429 14430 14431 14432 14433 14434 14435 14436 14437 14438 14439 14440 14441 14442 14443 14444 14445 14446 14447 14448 14449 14450 14451 14452 14453 14454 14455 14456 14457 14458 14459 14460 14461 14462 14463 14464 14465 14466 14467 14468 14469 14470 14471 14472 14473 14474 14475 14476 14477 14478 14479 14480 14481 14482 14483 14484 14485 14486 14487 14488 14489 14490 14491 14492 14493 14494 14495 14496 14497 14498 14499 14500 14501 14502 14503 14504 14505 14506 14507 14508 14509 14510 14511 14512 14513 14514 14515 14516 14517 14518 14519 14520 14521 14522 14523 14524 14525 14526 14527 14528 14529 14530 14531 14532 14533 14534 14535 14536 14537 14538 14539 14540 14541 14542 14543 14544 14545 14546 14547 14548 14549 14550 14551 14552 14553 14554 14555 14556 14557 14558 14559 14560 14561 14562 14563 14564 14565 14566 14567 14568 14569 14570 14571 14572 14573 14574 14575 14576 14577 14578 14579 14580 14581 14582 14583 14584 14585 14586 14587 14588 14589 14590 14591 14592 14593 14594 14595 14596 14597 14598 14599 14600 14601 14602 14603 14604 14605 14606 14607 14608 14609 14610 14611 14612 14613 14614 14615 14616 14617 14618 14619 14620 14621 14622 14623 14624 14625 14626 14627 14628 14629 14630 14631 14632 14633 14634 14635 14636 14637 14638 14639 14640 14641 14642 14643 14644 14645 14646 14647 14648 14649 14650 14651 14652 14653 14654 14655 14656 14657 14658 14659 14660 14661 14662 14663 14664 14665 14666 14667 14668 14669 14670 14671 14672 14673 14674 14675 14676 14677 14678 14679 14680 14681 14682 14683 14684 14685 14686 14687 14688 14689 14690 14691 14692 14693 14694 14695 14696 14697 14698 14699 14700 14701 14702 14703 14704 14705 14706 14707 14708 14709 14710 14711 14712 14713 14714 14715 14716 14717 14718 14719 14720 14721 14722 14723 14724 14725 14726 14727 14728 14729 14730 14731 14732 14733 14734 14735 14736 14737 14738 14739 14740 14741 14742 14743 14744 14745 14746 14747 14748 14749 14750 14751 14752 14753 14754 14755 14756 14757 14758 14759 14760 14761 14762 14763 14764 14765 14766 14767 14768 14769 14770 14771 14772 14773 14774 14775 14776 14777 14778 14779 14780 14781 14782 14783 14784 14785 14786 14787 14788 14789 14790 14791 14792 14793 14794 14795 14796 14797 14798 14799 14800 14801 14802 14803 14804 14805 14806 14807 14808 14809 14810 14811 14812 14813 14814 14815 14816 14817 14818 14819 14820 14821 14822 14823 14824 14825 14826 14827 14828 14829 14830 14831 14832 14833 14834 14835 14836 14837 14838 14839 14840 14841 14842 14843 14844 14845 14846 14847 14848 14849 14850 14851 14852 14853 14854 14855 14856 14857 14858 14859 14860 14861 14862 14863 14864 14865 14866 14867 14868 14869 14870 14871 14872 14873 14874 14875 14876 14877 14878 14879 14880 14881 14882 14883 14884 14885 14886 14887 14888 14889 14890 14891 14892 14893 14894 14895 14896 14897 14898 14899 14900 14901 14902 14903 14904 14905 14906 14907 14908 14909 14910 14911 14912 14913 14914 14915 14916 14917 14918 14919 14920 14921 14922 14923 14924 14925 14926 14927 14928 14929 14930 14931 14932 14933 14934 14935 14936 14937 14938 14939 14940 14941 14942 14943 14944 14945 14946 14947 14948 14949 14950 14951 14952 14953 14954 14955 14956 14957 14958 14959 14960 14961 14962 14963 14964 14965 14966 14967 14968 14969 14970 14971 14972 14973 14974 14975 14976 14977 14978 14979 14980 14981 14982 14983 14984 14985 14986 14987 14988 14989 14990 14991 14992 14993 14994 14995 14996 14997 14998 14999 15000 15001 15002 15003 15004 15005 15006 15007 15008 15009 15010 15011 15012 15013 15014 15015 15016 15017 15018 15019 15020 15021 15022 15023 15024 15025 15026 15027 15028 15029 15030 15031 15032 15033 15034 15035 15036 15037 15038 15039 15040 15041 15042 15043 15044 15045 15046 15047 15048 15049 15050 15051 15052 15053 15054 15055 15056 15057 15058 15059 15060 15061 15062 15063 15064 15065 15066 15067 15068 15069 15070 15071 15072 15073 15074 15075 15076 15077 15078 15079 15080 15081 15082 15083 15084 15085 15086 15087 15088 15089 15090 15091 15092 15093 15094 15095 15096 15097 15098 15099 15100 15101 15102 15103 15104 15105 15106 15107 15108 15109 15110 15111 15112 15113 15114 15115 15116 15117 15118 15119 15120 15121 15122 15123 15124 15125 15126 15127 15128 15129 15130 15131 15132 15133 15134 15135 15136 15137 15138 15139 15140 15141 15142 15143 15144 15145 15146 15147 15148 15149 15150 15151 15152 15153 15154 15155 15156 15157 15158 15159 15160 15161 15162 15163 15164 15165 15166 15167 15168 15169 15170 15171 15172 15173 15174 15175 15176 15177 15178 15179 15180 15181 15182 15183 15184 15185 15186 15187 15188 15189 15190 15191 15192 15193 15194 15195 15196 15197 15198 15199 15200 15201 15202 15203 15204 15205 15206 15207 15208 15209 15210 15211 15212 15213 15214 15215 15216 15217 15218 15219 15220 15221 15222 15223 15224 15225 15226 15227 15228 15229 15230 15231 15232 15233 15234 15235 15236 15237 15238 15239 15240 15241 15242 15243 15244 15245 15246 15247 15248 15249 15250 15251 15252 15253 15254 15255 15256 15257 15258 15259 15260 15261 15262 15263 15264 15265 15266 15267 15268 15269 15270 15271 15272 15273 15274 15275 15276 15277 15278 15279 15280 15281 15282 15283 15284 15285 15286 15287 15288 15289 15290 15291 15292 15293 15294 15295 15296 15297 15298 15299 15300 15301 15302 15303 15304 15305 15306 15307 15308 15309 15310 15311 15312 15313 15314 15315 15316 15317 15318 15319 15320 15321 15322 15323 15324 15325 15326 15327 15328 15329 15330 15331 15332 15333 15334 15335 15336 15337 15338 15339 15340 15341 15342 15343 15344 15345 15346 15347 15348 15349 15350 15351 15352 15353 15354 15355 15356 15357 15358 15359 15360 15361 15362 15363 15364 15365 15366 15367 15368 15369 15370 15371 15372 15373 15374 15375 15376 15377 15378 15379 15380 15381 15382 15383 15384 15385 15386 15387 15388 15389 15390 15391 15392 15393 15394 15395 15396 15397 15398 15399 15400 15401 15402 15403 15404 15405 15406 15407 15408 15409 15410 15411 15412 15413 15414 15415 15416 15417 15418 15419 15420 15421 15422 15423 15424 15425 15426 15427 15428 15429 15430 15431 15432 15433 15434 15435 15436 15437 15438 15439 15440 15441 15442 15443 15444 15445 15446 15447 15448 15449 15450 15451 15452 15453 15454 15455 15456 15457 15458 15459 15460 15461 15462 15463 15464 15465 15466 15467 15468 15469 15470 15471 15472 15473 15474 15475 15476 15477 15478 15479 15480 15481 15482 15483 15484 15485 15486 15487 15488 15489 15490 15491 15492 15493 15494 15495 15496 15497 15498 15499 15500 15501 15502 15503 15504 15505 15506 15507 15508 15509 15510 15511 15512 15513 15514 15515 15516 15517 15518 15519 15520 15521 15522 15523 15524 15525 15526 15527 15528 15529 15530 15531 15532 15533 15534 15535 15536 15537 15538 15539 15540 15541 15542 15543 15544 15545 15546 15547 15548 15549 15550 15551 15552 15553 15554 15555 15556 15557 15558 15559 15560 15561 15562 15563 15564 15565 15566 15567 15568 15569 15570 15571 15572 15573 15574 15575 15576 15577 15578 15579 15580 15581 15582 15583 15584 15585 15586 15587 15588 15589 15590 15591 15592 15593 15594 15595 15596 15597 15598 15599 15600 15601 15602 15603 15604 15605 15606 15607 15608 15609 15610 15611 15612 15613 15614 15615 15616 15617 15618 15619 15620 15621 15622 15623 15624 15625 15626 15627 15628 15629 15630 15631 15632 15633 15634 15635 15636 15637 15638 15639 15640 15641 15642 15643 15644 15645 15646 15647 15648 15649 15650 15651 15652 15653 15654 15655 15656 15657 15658 15659 15660 15661 15662 15663 15664 15665 15666 15667 15668 15669 15670 15671 15672 15673 15674 15675 15676 15677 15678 15679 15680 15681 15682 15683 15684 15685 15686 15687 15688 15689 15690 15691 15692 15693 15694 15695 15696 15697 15698 15699 15700 15701 15702 15703 15704 15705 15706 15707 15708 15709 15710 15711 15712 15713 15714 15715 15716 15717 15718 15719 15720 15721 15722 15723 15724 15725 15726 15727 15728 15729 15730 15731 15732 15733 15734 15735 15736 15737 15738 15739 15740 15741 15742 15743 15744 15745 15746 15747 15748 15749 15750 15751 15752 15753 15754 15755 15756 15757 15758 15759 15760 15761 15762 15763 15764 15765 15766 15767 15768 15769 15770 15771 15772 15773 15774 15775 15776 15777 15778 15779 15780 15781 15782 15783 15784 15785 15786 15787 15788 15789 15790 15791 15792 15793 15794 15795 15796 15797 15798 15799 15800 15801 15802 15803 15804 15805 15806 15807 15808 15809 15810 15811 15812 15813 15814 15815 15816 15817 15818 15819 15820 15821 15822 15823 15824 15825 15826 15827 15828 15829 15830 15831 15832 15833 15834 15835 15836 15837 15838 15839 15840 15841 15842 15843 15844 15845 15846 15847 15848 15849 15850 15851 15852 15853 15854 15855 15856 15857 15858 15859 15860 15861 15862 15863 15864 15865 15866 15867 15868 15869 15870 15871 15872 15873 15874 15875 15876 15877 15878 15879 15880 15881 15882 15883 15884 15885 15886 15887 15888 15889 15890 15891 15892 15893 15894 15895 15896 15897 15898 15899 15900 15901 15902 15903 15904 15905 15906 15907 15908 15909 15910 15911 15912 15913 15914 15915 15916 15917 15918 15919 15920 15921 15922 15923 15924 15925 15926 15927 15928 15929 15930 15931 15932 15933 15934 15935 15936 15937 15938 15939 15940 15941 15942 15943 15944 15945 15946 15947 15948 15949 15950 15951 15952 15953 15954 15955 15956 15957 15958 15959 15960 15961 15962 15963 15964 15965 15966 15967 15968 15969 15970 15971 15972 15973 15974 15975 15976 15977 15978 15979 15980 15981 15982 15983 15984 15985 15986 15987 15988 15989 15990 15991 15992 15993 15994 15995 15996 15997 15998 15999 16000 16001 16002 16003 16004 16005 16006 16007 16008 16009 16010 16011 16012 16013 16014 16015 16016 16017 16018 16019 16020 16021 16022 16023 16024 16025 16026 16027 16028 16029 16030 16031 16032 16033 16034 16035 16036 16037 16038 16039 16040 16041 16042 16043 16044 16045 16046 16047 16048 16049 16050 16051 16052 16053 16054 16055 16056 16057 16058 16059 16060 16061 16062 16063 16064 16065 16066 16067 16068 16069 16070 16071 16072 16073 16074 16075 16076 16077 16078 16079 16080 16081 16082 16083 16084 16085 16086 16087 16088 16089 16090 16091 16092 16093 16094 16095 16096 16097 16098
/* Everything about breakpoints, for GDB.

   Copyright (C) 1986-2018 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "arch-utils.h"
#include <ctype.h>
#include "hashtab.h"
#include "symtab.h"
#include "frame.h"
#include "breakpoint.h"
#include "tracepoint.h"
#include "gdbtypes.h"
#include "expression.h"
#include "gdbcore.h"
#include "gdbcmd.h"
#include "value.h"
#include "command.h"
#include "inferior.h"
#include "infrun.h"
#include "gdbthread.h"
#include "target.h"
#include "language.h"
#include "gdb-demangle.h"
#include "filenames.h"
#include "annotate.h"
#include "symfile.h"
#include "objfiles.h"
#include "source.h"
#include "linespec.h"
#include "completer.h"
#include "ui-out.h"
#include "cli/cli-script.h"
#include "block.h"
#include "solib.h"
#include "solist.h"
#include "observable.h"
#include "memattr.h"
#include "ada-lang.h"
#include "top.h"
#include "valprint.h"
#include "jit.h"
#include "parser-defs.h"
#include "gdb_regex.h"
#include "probe.h"
#include "cli/cli-utils.h"
#include "continuations.h"
#include "stack.h"
#include "skip.h"
#include "ax-gdb.h"
#include "dummy-frame.h"
#include "interps.h"
#include "format.h"
#include "thread-fsm.h"
#include "tid-parse.h"

/* readline include files */
#include "readline/readline.h"
#include "readline/history.h"

/* readline defines this.  */
#undef savestring

#include "mi/mi-common.h"
#include "extension.h"
#include <algorithm>
#include "progspace-and-thread.h"
#include "common/array-view.h"
#include "common/gdb_optional.h"

/* Enums for exception-handling support.  */
enum exception_event_kind
{
  EX_EVENT_THROW,
  EX_EVENT_RETHROW,
  EX_EVENT_CATCH
};

/* Prototypes for local functions.  */

static void map_breakpoint_numbers (const char *,
				    gdb::function_view<void (breakpoint *)>);

static void breakpoint_re_set_default (struct breakpoint *);

static void
  create_sals_from_location_default (const struct event_location *location,
				     struct linespec_result *canonical,
				     enum bptype type_wanted);

static void create_breakpoints_sal_default (struct gdbarch *,
					    struct linespec_result *,
					    gdb::unique_xmalloc_ptr<char>,
					    gdb::unique_xmalloc_ptr<char>,
					    enum bptype,
					    enum bpdisp, int, int,
					    int,
					    const struct breakpoint_ops *,
					    int, int, int, unsigned);

static std::vector<symtab_and_line> decode_location_default
  (struct breakpoint *b, const struct event_location *location,
   struct program_space *search_pspace);

static int can_use_hardware_watchpoint (struct value *);

static void mention (struct breakpoint *);

static struct breakpoint *set_raw_breakpoint_without_location (struct gdbarch *,
							       enum bptype,
							       const struct breakpoint_ops *);
static struct bp_location *add_location_to_breakpoint (struct breakpoint *,
						       const struct symtab_and_line *);

/* This function is used in gdbtk sources and thus can not be made
   static.  */
struct breakpoint *set_raw_breakpoint (struct gdbarch *gdbarch,
				       struct symtab_and_line,
				       enum bptype,
				       const struct breakpoint_ops *);

static struct breakpoint *
  momentary_breakpoint_from_master (struct breakpoint *orig,
				    enum bptype type,
				    const struct breakpoint_ops *ops,
				    int loc_enabled);

static void breakpoint_adjustment_warning (CORE_ADDR, CORE_ADDR, int, int);

static CORE_ADDR adjust_breakpoint_address (struct gdbarch *gdbarch,
					    CORE_ADDR bpaddr,
                                            enum bptype bptype);

static void describe_other_breakpoints (struct gdbarch *,
					struct program_space *, CORE_ADDR,
					struct obj_section *, int);

static int watchpoint_locations_match (struct bp_location *loc1,
				       struct bp_location *loc2);

static int breakpoint_location_address_match (struct bp_location *bl,
					      const struct address_space *aspace,
					      CORE_ADDR addr);

static int breakpoint_location_address_range_overlap (struct bp_location *,
						      const address_space *,
						      CORE_ADDR, int);

static int remove_breakpoint (struct bp_location *);
static int remove_breakpoint_1 (struct bp_location *, enum remove_bp_reason);

static enum print_stop_action print_bp_stop_message (bpstat bs);

static int hw_breakpoint_used_count (void);

static int hw_watchpoint_use_count (struct breakpoint *);

static int hw_watchpoint_used_count_others (struct breakpoint *except,
					    enum bptype type,
					    int *other_type_used);

static void enable_breakpoint_disp (struct breakpoint *, enum bpdisp,
				    int count);

static void free_bp_location (struct bp_location *loc);
static void incref_bp_location (struct bp_location *loc);
static void decref_bp_location (struct bp_location **loc);

static struct bp_location *allocate_bp_location (struct breakpoint *bpt);

/* update_global_location_list's modes of operation wrt to whether to
   insert locations now.  */
enum ugll_insert_mode
{
  /* Don't insert any breakpoint locations into the inferior, only
     remove already-inserted locations that no longer should be
     inserted.  Functions that delete a breakpoint or breakpoints
     should specify this mode, so that deleting a breakpoint doesn't
     have the side effect of inserting the locations of other
     breakpoints that are marked not-inserted, but should_be_inserted
     returns true on them.

     This behavior is useful is situations close to tear-down -- e.g.,
     after an exec, while the target still has execution, but
     breakpoint shadows of the previous executable image should *NOT*
     be restored to the new image; or before detaching, where the
     target still has execution and wants to delete breakpoints from
     GDB's lists, and all breakpoints had already been removed from
     the inferior.  */
  UGLL_DONT_INSERT,

  /* May insert breakpoints iff breakpoints_should_be_inserted_now
     claims breakpoints should be inserted now.  */
  UGLL_MAY_INSERT,

  /* Insert locations now, irrespective of
     breakpoints_should_be_inserted_now.  E.g., say all threads are
     stopped right now, and the user did "continue".  We need to
     insert breakpoints _before_ resuming the target, but
     UGLL_MAY_INSERT wouldn't insert them, because
     breakpoints_should_be_inserted_now returns false at that point,
     as no thread is running yet.  */
  UGLL_INSERT
};

static void update_global_location_list (enum ugll_insert_mode);

static void update_global_location_list_nothrow (enum ugll_insert_mode);

static int is_hardware_watchpoint (const struct breakpoint *bpt);

static void insert_breakpoint_locations (void);

static void trace_pass_command (const char *, int);

static void set_tracepoint_count (int num);

static int is_masked_watchpoint (const struct breakpoint *b);

static struct bp_location **get_first_locp_gte_addr (CORE_ADDR address);

/* Return 1 if B refers to a static tracepoint set by marker ("-m"), zero
   otherwise.  */

static int strace_marker_p (struct breakpoint *b);

/* The breakpoint_ops structure to be inherited by all breakpoint_ops
   that are implemented on top of software or hardware breakpoints
   (user breakpoints, internal and momentary breakpoints, etc.).  */
static struct breakpoint_ops bkpt_base_breakpoint_ops;

/* Internal breakpoints class type.  */
static struct breakpoint_ops internal_breakpoint_ops;

/* Momentary breakpoints class type.  */
static struct breakpoint_ops momentary_breakpoint_ops;

/* The breakpoint_ops structure to be used in regular user created
   breakpoints.  */
struct breakpoint_ops bkpt_breakpoint_ops;

/* Breakpoints set on probes.  */
static struct breakpoint_ops bkpt_probe_breakpoint_ops;

/* Dynamic printf class type.  */
struct breakpoint_ops dprintf_breakpoint_ops;

/* The style in which to perform a dynamic printf.  This is a user
   option because different output options have different tradeoffs;
   if GDB does the printing, there is better error handling if there
   is a problem with any of the arguments, but using an inferior
   function lets you have special-purpose printers and sending of
   output to the same place as compiled-in print functions.  */

static const char dprintf_style_gdb[] = "gdb";
static const char dprintf_style_call[] = "call";
static const char dprintf_style_agent[] = "agent";
static const char *const dprintf_style_enums[] = {
  dprintf_style_gdb,
  dprintf_style_call,
  dprintf_style_agent,
  NULL
};
static const char *dprintf_style = dprintf_style_gdb;

/* The function to use for dynamic printf if the preferred style is to
   call into the inferior.  The value is simply a string that is
   copied into the command, so it can be anything that GDB can
   evaluate to a callable address, not necessarily a function name.  */

static char *dprintf_function;

/* The channel to use for dynamic printf if the preferred style is to
   call into the inferior; if a nonempty string, it will be passed to
   the call as the first argument, with the format string as the
   second.  As with the dprintf function, this can be anything that
   GDB knows how to evaluate, so in addition to common choices like
   "stderr", this could be an app-specific expression like
   "mystreams[curlogger]".  */

static char *dprintf_channel;

/* True if dprintf commands should continue to operate even if GDB
   has disconnected.  */
static int disconnected_dprintf = 1;

struct command_line *
breakpoint_commands (struct breakpoint *b)
{
  return b->commands ? b->commands.get () : NULL;
}

/* Flag indicating that a command has proceeded the inferior past the
   current breakpoint.  */

static int breakpoint_proceeded;

const char *
bpdisp_text (enum bpdisp disp)
{
  /* NOTE: the following values are a part of MI protocol and
     represent values of 'disp' field returned when inferior stops at
     a breakpoint.  */
  static const char * const bpdisps[] = {"del", "dstp", "dis", "keep"};

  return bpdisps[(int) disp];
}

/* Prototypes for exported functions.  */
/* If FALSE, gdb will not use hardware support for watchpoints, even
   if such is available.  */
static int can_use_hw_watchpoints;

static void
show_can_use_hw_watchpoints (struct ui_file *file, int from_tty,
			     struct cmd_list_element *c,
			     const char *value)
{
  fprintf_filtered (file,
		    _("Debugger's willingness to use "
		      "watchpoint hardware is %s.\n"),
		    value);
}

/* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
   If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
   for unrecognized breakpoint locations.
   If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized.  */
static enum auto_boolean pending_break_support;
static void
show_pending_break_support (struct ui_file *file, int from_tty,
			    struct cmd_list_element *c,
			    const char *value)
{
  fprintf_filtered (file,
		    _("Debugger's behavior regarding "
		      "pending breakpoints is %s.\n"),
		    value);
}

/* If 1, gdb will automatically use hardware breakpoints for breakpoints
   set with "break" but falling in read-only memory.
   If 0, gdb will warn about such breakpoints, but won't automatically
   use hardware breakpoints.  */
static int automatic_hardware_breakpoints;
static void
show_automatic_hardware_breakpoints (struct ui_file *file, int from_tty,
				     struct cmd_list_element *c,
				     const char *value)
{
  fprintf_filtered (file,
		    _("Automatic usage of hardware breakpoints is %s.\n"),
		    value);
}

/* If on, GDB keeps breakpoints inserted even if the inferior is
   stopped, and immediately inserts any new breakpoints as soon as
   they're created.  If off (default), GDB keeps breakpoints off of
   the target as long as possible.  That is, it delays inserting
   breakpoints until the next resume, and removes them again when the
   target fully stops.  This is a bit safer in case GDB crashes while
   processing user input.  */
static int always_inserted_mode = 0;

static void
show_always_inserted_mode (struct ui_file *file, int from_tty,
		     struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file, _("Always inserted breakpoint mode is %s.\n"),
		    value);
}

/* See breakpoint.h.  */

int
breakpoints_should_be_inserted_now (void)
{
  if (gdbarch_has_global_breakpoints (target_gdbarch ()))
    {
      /* If breakpoints are global, they should be inserted even if no
	 thread under gdb's control is running, or even if there are
	 no threads under GDB's control yet.  */
      return 1;
    }
  else if (target_has_execution)
    {
      struct thread_info *tp;

      if (always_inserted_mode)
	{
	  /* The user wants breakpoints inserted even if all threads
	     are stopped.  */
	  return 1;
	}

      if (threads_are_executing ())
	return 1;

      /* Don't remove breakpoints yet if, even though all threads are
	 stopped, we still have events to process.  */
      ALL_NON_EXITED_THREADS (tp)
	if (tp->resumed
	    && tp->suspend.waitstatus_pending_p)
	  return 1;
    }
  return 0;
}

static const char condition_evaluation_both[] = "host or target";

/* Modes for breakpoint condition evaluation.  */
static const char condition_evaluation_auto[] = "auto";
static const char condition_evaluation_host[] = "host";
static const char condition_evaluation_target[] = "target";
static const char *const condition_evaluation_enums[] = {
  condition_evaluation_auto,
  condition_evaluation_host,
  condition_evaluation_target,
  NULL
};

/* Global that holds the current mode for breakpoint condition evaluation.  */
static const char *condition_evaluation_mode_1 = condition_evaluation_auto;

/* Global that we use to display information to the user (gets its value from
   condition_evaluation_mode_1.  */
static const char *condition_evaluation_mode = condition_evaluation_auto;

/* Translate a condition evaluation mode MODE into either "host"
   or "target".  This is used mostly to translate from "auto" to the
   real setting that is being used.  It returns the translated
   evaluation mode.  */

static const char *
translate_condition_evaluation_mode (const char *mode)
{
  if (mode == condition_evaluation_auto)
    {
      if (target_supports_evaluation_of_breakpoint_conditions ())
	return condition_evaluation_target;
      else
	return condition_evaluation_host;
    }
  else
    return mode;
}

/* Discovers what condition_evaluation_auto translates to.  */

static const char *
breakpoint_condition_evaluation_mode (void)
{
  return translate_condition_evaluation_mode (condition_evaluation_mode);
}

/* Return true if GDB should evaluate breakpoint conditions or false
   otherwise.  */

static int
gdb_evaluates_breakpoint_condition_p (void)
{
  const char *mode = breakpoint_condition_evaluation_mode ();

  return (mode == condition_evaluation_host);
}

/* Are we executing breakpoint commands?  */
static int executing_breakpoint_commands;

/* Are overlay event breakpoints enabled? */
static int overlay_events_enabled;

/* See description in breakpoint.h. */
int target_exact_watchpoints = 0;

/* Walk the following statement or block through all breakpoints.
   ALL_BREAKPOINTS_SAFE does so even if the statement deletes the
   current breakpoint.  */

#define ALL_BREAKPOINTS(B)  for (B = breakpoint_chain; B; B = B->next)

#define ALL_BREAKPOINTS_SAFE(B,TMP)	\
	for (B = breakpoint_chain;	\
	     B ? (TMP=B->next, 1): 0;	\
	     B = TMP)

/* Similar iterator for the low-level breakpoints.  SAFE variant is
   not provided so update_global_location_list must not be called
   while executing the block of ALL_BP_LOCATIONS.  */

#define ALL_BP_LOCATIONS(B,BP_TMP)					\
	for (BP_TMP = bp_locations;					\
	     BP_TMP < bp_locations + bp_locations_count && (B = *BP_TMP);\
	     BP_TMP++)

/* Iterates through locations with address ADDRESS for the currently selected
   program space.  BP_LOCP_TMP points to each object.  BP_LOCP_START points
   to where the loop should start from.
   If BP_LOCP_START is a NULL pointer, the macro automatically seeks the
   appropriate location to start with.  */

#define ALL_BP_LOCATIONS_AT_ADDR(BP_LOCP_TMP, BP_LOCP_START, ADDRESS)	\
	for (BP_LOCP_START = BP_LOCP_START == NULL ? get_first_locp_gte_addr (ADDRESS) : BP_LOCP_START, \
	     BP_LOCP_TMP = BP_LOCP_START;				\
	     BP_LOCP_START						\
	     && (BP_LOCP_TMP < bp_locations + bp_locations_count	\
	     && (*BP_LOCP_TMP)->address == ADDRESS);			\
	     BP_LOCP_TMP++)

/* Iterator for tracepoints only.  */

#define ALL_TRACEPOINTS(B)  \
  for (B = breakpoint_chain; B; B = B->next)  \
    if (is_tracepoint (B))

/* Chains of all breakpoints defined.  */

struct breakpoint *breakpoint_chain;

/* Array is sorted by bp_locations_compare - primarily by the ADDRESS.  */

static struct bp_location **bp_locations;

/* Number of elements of BP_LOCATIONS.  */

static unsigned bp_locations_count;

/* Maximum alignment offset between bp_target_info.PLACED_ADDRESS and
   ADDRESS for the current elements of BP_LOCATIONS which get a valid
   result from bp_location_has_shadow.  You can use it for roughly
   limiting the subrange of BP_LOCATIONS to scan for shadow bytes for
   an address you need to read.  */

static CORE_ADDR bp_locations_placed_address_before_address_max;

/* Maximum offset plus alignment between bp_target_info.PLACED_ADDRESS
   + bp_target_info.SHADOW_LEN and ADDRESS for the current elements of
   BP_LOCATIONS which get a valid result from bp_location_has_shadow.
   You can use it for roughly limiting the subrange of BP_LOCATIONS to
   scan for shadow bytes for an address you need to read.  */

static CORE_ADDR bp_locations_shadow_len_after_address_max;

/* The locations that no longer correspond to any breakpoint, unlinked
   from the bp_locations array, but for which a hit may still be
   reported by a target.  */
VEC(bp_location_p) *moribund_locations = NULL;

/* Number of last breakpoint made.  */

static int breakpoint_count;

/* The value of `breakpoint_count' before the last command that
   created breakpoints.  If the last (break-like) command created more
   than one breakpoint, then the difference between BREAKPOINT_COUNT
   and PREV_BREAKPOINT_COUNT is more than one.  */
static int prev_breakpoint_count;

/* Number of last tracepoint made.  */

static int tracepoint_count;

static struct cmd_list_element *breakpoint_set_cmdlist;
static struct cmd_list_element *breakpoint_show_cmdlist;
struct cmd_list_element *save_cmdlist;

/* See declaration at breakpoint.h.  */

struct breakpoint *
breakpoint_find_if (int (*func) (struct breakpoint *b, void *d),
		    void *user_data)
{
  struct breakpoint *b = NULL;

  ALL_BREAKPOINTS (b)
    {
      if (func (b, user_data) != 0)
	break;
    }

  return b;
}

/* Return whether a breakpoint is an active enabled breakpoint.  */
static int
breakpoint_enabled (struct breakpoint *b)
{
  return (b->enable_state == bp_enabled);
}

/* Set breakpoint count to NUM.  */

static void
set_breakpoint_count (int num)
{
  prev_breakpoint_count = breakpoint_count;
  breakpoint_count = num;
  set_internalvar_integer (lookup_internalvar ("bpnum"), num);
}

/* Used by `start_rbreak_breakpoints' below, to record the current
   breakpoint count before "rbreak" creates any breakpoint.  */
static int rbreak_start_breakpoint_count;

/* Called at the start an "rbreak" command to record the first
   breakpoint made.  */

scoped_rbreak_breakpoints::scoped_rbreak_breakpoints ()
{
  rbreak_start_breakpoint_count = breakpoint_count;
}

/* Called at the end of an "rbreak" command to record the last
   breakpoint made.  */

scoped_rbreak_breakpoints::~scoped_rbreak_breakpoints ()
{
  prev_breakpoint_count = rbreak_start_breakpoint_count;
}

/* Used in run_command to zero the hit count when a new run starts.  */

void
clear_breakpoint_hit_counts (void)
{
  struct breakpoint *b;

  ALL_BREAKPOINTS (b)
    b->hit_count = 0;
}


/* Return the breakpoint with the specified number, or NULL
   if the number does not refer to an existing breakpoint.  */

struct breakpoint *
get_breakpoint (int num)
{
  struct breakpoint *b;

  ALL_BREAKPOINTS (b)
    if (b->number == num)
      return b;
  
  return NULL;
}



/* Mark locations as "conditions have changed" in case the target supports
   evaluating conditions on its side.  */

static void
mark_breakpoint_modified (struct breakpoint *b)
{
  struct bp_location *loc;

  /* This is only meaningful if the target is
     evaluating conditions and if the user has
     opted for condition evaluation on the target's
     side.  */
  if (gdb_evaluates_breakpoint_condition_p ()
      || !target_supports_evaluation_of_breakpoint_conditions ())
    return;

  if (!is_breakpoint (b))
    return;

  for (loc = b->loc; loc; loc = loc->next)
    loc->condition_changed = condition_modified;
}

/* Mark location as "conditions have changed" in case the target supports
   evaluating conditions on its side.  */

static void
mark_breakpoint_location_modified (struct bp_location *loc)
{
  /* This is only meaningful if the target is
     evaluating conditions and if the user has
     opted for condition evaluation on the target's
     side.  */
  if (gdb_evaluates_breakpoint_condition_p ()
      || !target_supports_evaluation_of_breakpoint_conditions ())

    return;

  if (!is_breakpoint (loc->owner))
    return;

  loc->condition_changed = condition_modified;
}

/* Sets the condition-evaluation mode using the static global
   condition_evaluation_mode.  */

static void
set_condition_evaluation_mode (const char *args, int from_tty,
			       struct cmd_list_element *c)
{
  const char *old_mode, *new_mode;

  if ((condition_evaluation_mode_1 == condition_evaluation_target)
      && !target_supports_evaluation_of_breakpoint_conditions ())
    {
      condition_evaluation_mode_1 = condition_evaluation_mode;
      warning (_("Target does not support breakpoint condition evaluation.\n"
		 "Using host evaluation mode instead."));
      return;
    }

  new_mode = translate_condition_evaluation_mode (condition_evaluation_mode_1);
  old_mode = translate_condition_evaluation_mode (condition_evaluation_mode);

  /* Flip the switch.  Flip it even if OLD_MODE == NEW_MODE as one of the
     settings was "auto".  */
  condition_evaluation_mode = condition_evaluation_mode_1;

  /* Only update the mode if the user picked a different one.  */
  if (new_mode != old_mode)
    {
      struct bp_location *loc, **loc_tmp;
      /* If the user switched to a different evaluation mode, we
	 need to synch the changes with the target as follows:

	 "host" -> "target": Send all (valid) conditions to the target.
	 "target" -> "host": Remove all the conditions from the target.
      */

      if (new_mode == condition_evaluation_target)
	{
	  /* Mark everything modified and synch conditions with the
	     target.  */
	  ALL_BP_LOCATIONS (loc, loc_tmp)
	    mark_breakpoint_location_modified (loc);
  	}
      else
	{
	  /* Manually mark non-duplicate locations to synch conditions
	     with the target.  We do this to remove all the conditions the
	     target knows about.  */
	  ALL_BP_LOCATIONS (loc, loc_tmp)
	    if (is_breakpoint (loc->owner) && loc->inserted)
	      loc->needs_update = 1;
	}

      /* Do the update.  */
      update_global_location_list (UGLL_MAY_INSERT);
    }

  return;
}

/* Shows the current mode of breakpoint condition evaluation.  Explicitly shows
   what "auto" is translating to.  */

static void
show_condition_evaluation_mode (struct ui_file *file, int from_tty,
				struct cmd_list_element *c, const char *value)
{
  if (condition_evaluation_mode == condition_evaluation_auto)
    fprintf_filtered (file,
		      _("Breakpoint condition evaluation "
			"mode is %s (currently %s).\n"),
		      value,
		      breakpoint_condition_evaluation_mode ());
  else
    fprintf_filtered (file, _("Breakpoint condition evaluation mode is %s.\n"),
		      value);
}

/* A comparison function for bp_location AP and BP that is used by
   bsearch.  This comparison function only cares about addresses, unlike
   the more general bp_locations_compare function.  */

static int
bp_locations_compare_addrs (const void *ap, const void *bp)
{
  const struct bp_location *a = *(const struct bp_location **) ap;
  const struct bp_location *b = *(const struct bp_location **) bp;

  if (a->address == b->address)
    return 0;
  else
    return ((a->address > b->address) - (a->address < b->address));
}

/* Helper function to skip all bp_locations with addresses
   less than ADDRESS.  It returns the first bp_location that
   is greater than or equal to ADDRESS.  If none is found, just
   return NULL.  */

static struct bp_location **
get_first_locp_gte_addr (CORE_ADDR address)
{
  struct bp_location dummy_loc;
  struct bp_location *dummy_locp = &dummy_loc;
  struct bp_location **locp_found = NULL;

  /* Initialize the dummy location's address field.  */
  dummy_loc.address = address;

  /* Find a close match to the first location at ADDRESS.  */
  locp_found = ((struct bp_location **)
		bsearch (&dummy_locp, bp_locations, bp_locations_count,
			 sizeof (struct bp_location **),
			 bp_locations_compare_addrs));

  /* Nothing was found, nothing left to do.  */
  if (locp_found == NULL)
    return NULL;

  /* We may have found a location that is at ADDRESS but is not the first in the
     location's list.  Go backwards (if possible) and locate the first one.  */
  while ((locp_found - 1) >= bp_locations
	 && (*(locp_found - 1))->address == address)
    locp_found--;

  return locp_found;
}

void
set_breakpoint_condition (struct breakpoint *b, const char *exp,
			  int from_tty)
{
  xfree (b->cond_string);
  b->cond_string = NULL;

  if (is_watchpoint (b))
    {
      struct watchpoint *w = (struct watchpoint *) b;

      w->cond_exp.reset ();
    }
  else
    {
      struct bp_location *loc;

      for (loc = b->loc; loc; loc = loc->next)
	{
	  loc->cond.reset ();

	  /* No need to free the condition agent expression
	     bytecode (if we have one).  We will handle this
	     when we go through update_global_location_list.  */
	}
    }

  if (*exp == 0)
    {
      if (from_tty)
	printf_filtered (_("Breakpoint %d now unconditional.\n"), b->number);
    }
  else
    {
      const char *arg = exp;

      /* I don't know if it matters whether this is the string the user
	 typed in or the decompiled expression.  */
      b->cond_string = xstrdup (arg);
      b->condition_not_parsed = 0;

      if (is_watchpoint (b))
	{
	  struct watchpoint *w = (struct watchpoint *) b;

	  innermost_block.reset ();
	  arg = exp;
	  w->cond_exp = parse_exp_1 (&arg, 0, 0, 0);
	  if (*arg)
	    error (_("Junk at end of expression"));
	  w->cond_exp_valid_block = innermost_block.block ();
	}
      else
	{
	  struct bp_location *loc;

	  for (loc = b->loc; loc; loc = loc->next)
	    {
	      arg = exp;
	      loc->cond =
		parse_exp_1 (&arg, loc->address,
			     block_for_pc (loc->address), 0);
	      if (*arg)
		error (_("Junk at end of expression"));
	    }
	}
    }
  mark_breakpoint_modified (b);

  gdb::observers::breakpoint_modified.notify (b);
}

/* Completion for the "condition" command.  */

static void
condition_completer (struct cmd_list_element *cmd,
		     completion_tracker &tracker,
		     const char *text, const char *word)
{
  const char *space;

  text = skip_spaces (text);
  space = skip_to_space (text);
  if (*space == '\0')
    {
      int len;
      struct breakpoint *b;

      if (text[0] == '$')
	{
	  /* We don't support completion of history indices.  */
	  if (!isdigit (text[1]))
	    complete_internalvar (tracker, &text[1]);
	  return;
	}

      /* We're completing the breakpoint number.  */
      len = strlen (text);

      ALL_BREAKPOINTS (b)
	{
	  char number[50];

	  xsnprintf (number, sizeof (number), "%d", b->number);

	  if (strncmp (number, text, len) == 0)
	    {
	      gdb::unique_xmalloc_ptr<char> copy (xstrdup (number));
	      tracker.add_completion (std::move (copy));
	    }
	}

      return;
    }

  /* We're completing the expression part.  */
  text = skip_spaces (space);
  expression_completer (cmd, tracker, text, word);
}

/* condition N EXP -- set break condition of breakpoint N to EXP.  */

static void
condition_command (const char *arg, int from_tty)
{
  struct breakpoint *b;
  const char *p;
  int bnum;

  if (arg == 0)
    error_no_arg (_("breakpoint number"));

  p = arg;
  bnum = get_number (&p);
  if (bnum == 0)
    error (_("Bad breakpoint argument: '%s'"), arg);

  ALL_BREAKPOINTS (b)
    if (b->number == bnum)
      {
	/* Check if this breakpoint has a "stop" method implemented in an
	   extension language.  This method and conditions entered into GDB
	   from the CLI are mutually exclusive.  */
	const struct extension_language_defn *extlang
	  = get_breakpoint_cond_ext_lang (b, EXT_LANG_NONE);

	if (extlang != NULL)
	  {
	    error (_("Only one stop condition allowed.  There is currently"
		     " a %s stop condition defined for this breakpoint."),
		   ext_lang_capitalized_name (extlang));
	  }
	set_breakpoint_condition (b, p, from_tty);

	if (is_breakpoint (b))
	  update_global_location_list (UGLL_MAY_INSERT);

	return;
      }

  error (_("No breakpoint number %d."), bnum);
}

/* Check that COMMAND do not contain commands that are suitable
   only for tracepoints and not suitable for ordinary breakpoints.
   Throw if any such commands is found.  */

static void
check_no_tracepoint_commands (struct command_line *commands)
{
  struct command_line *c;

  for (c = commands; c; c = c->next)
    {
      int i;

      if (c->control_type == while_stepping_control)
	error (_("The 'while-stepping' command can "
		 "only be used for tracepoints"));

      for (i = 0; i < c->body_count; ++i)
	check_no_tracepoint_commands ((c->body_list)[i]);

      /* Not that command parsing removes leading whitespace and comment
	 lines and also empty lines.  So, we only need to check for
	 command directly.  */
      if (strstr (c->line, "collect ") == c->line)
	error (_("The 'collect' command can only be used for tracepoints"));

      if (strstr (c->line, "teval ") == c->line)
	error (_("The 'teval' command can only be used for tracepoints"));
    }
}

struct longjmp_breakpoint : public breakpoint
{
  ~longjmp_breakpoint () override;
};

/* Encapsulate tests for different types of tracepoints.  */

static bool
is_tracepoint_type (bptype type)
{
  return (type == bp_tracepoint
	  || type == bp_fast_tracepoint
	  || type == bp_static_tracepoint);
}

static bool
is_longjmp_type (bptype type)
{
  return type == bp_longjmp || type == bp_exception;
}

int
is_tracepoint (const struct breakpoint *b)
{
  return is_tracepoint_type (b->type);
}

/* Factory function to create an appropriate instance of breakpoint given
   TYPE.  */

static std::unique_ptr<breakpoint>
new_breakpoint_from_type (bptype type)
{
  breakpoint *b;

  if (is_tracepoint_type (type))
    b = new tracepoint ();
  else if (is_longjmp_type (type))
    b = new longjmp_breakpoint ();
  else
    b = new breakpoint ();

  return std::unique_ptr<breakpoint> (b);
}

/* A helper function that validates that COMMANDS are valid for a
   breakpoint.  This function will throw an exception if a problem is
   found.  */

static void
validate_commands_for_breakpoint (struct breakpoint *b,
				  struct command_line *commands)
{
  if (is_tracepoint (b))
    {
      struct tracepoint *t = (struct tracepoint *) b;
      struct command_line *c;
      struct command_line *while_stepping = 0;

      /* Reset the while-stepping step count.  The previous commands
         might have included a while-stepping action, while the new
         ones might not.  */
      t->step_count = 0;

      /* We need to verify that each top-level element of commands is
	 valid for tracepoints, that there's at most one
	 while-stepping element, and that the while-stepping's body
	 has valid tracing commands excluding nested while-stepping.
	 We also need to validate the tracepoint action line in the
	 context of the tracepoint --- validate_actionline actually
	 has side effects, like setting the tracepoint's
	 while-stepping STEP_COUNT, in addition to checking if the
	 collect/teval actions parse and make sense in the
	 tracepoint's context.  */
      for (c = commands; c; c = c->next)
	{
	  if (c->control_type == while_stepping_control)
	    {
	      if (b->type == bp_fast_tracepoint)
		error (_("The 'while-stepping' command "
			 "cannot be used for fast tracepoint"));
	      else if (b->type == bp_static_tracepoint)
		error (_("The 'while-stepping' command "
			 "cannot be used for static tracepoint"));

	      if (while_stepping)
		error (_("The 'while-stepping' command "
			 "can be used only once"));
	      else
		while_stepping = c;
	    }

	  validate_actionline (c->line, b);
	}
      if (while_stepping)
	{
	  struct command_line *c2;

	  gdb_assert (while_stepping->body_count == 1);
	  c2 = while_stepping->body_list[0];
	  for (; c2; c2 = c2->next)
	    {
	      if (c2->control_type == while_stepping_control)
		error (_("The 'while-stepping' command cannot be nested"));
	    }
	}
    }
  else
    {
      check_no_tracepoint_commands (commands);
    }
}

/* Return a vector of all the static tracepoints set at ADDR.  The
   caller is responsible for releasing the vector.  */

VEC(breakpoint_p) *
static_tracepoints_here (CORE_ADDR addr)
{
  struct breakpoint *b;
  VEC(breakpoint_p) *found = 0;
  struct bp_location *loc;

  ALL_BREAKPOINTS (b)
    if (b->type == bp_static_tracepoint)
      {
	for (loc = b->loc; loc; loc = loc->next)
	  if (loc->address == addr)
	    VEC_safe_push(breakpoint_p, found, b);
      }

  return found;
}

/* Set the command list of B to COMMANDS.  If breakpoint is tracepoint,
   validate that only allowed commands are included.  */

void
breakpoint_set_commands (struct breakpoint *b, 
			 command_line_up &&commands)
{
  validate_commands_for_breakpoint (b, commands.get ());

  b->commands = std::move (commands);
  gdb::observers::breakpoint_modified.notify (b);
}

/* Set the internal `silent' flag on the breakpoint.  Note that this
   is not the same as the "silent" that may appear in the breakpoint's
   commands.  */

void
breakpoint_set_silent (struct breakpoint *b, int silent)
{
  int old_silent = b->silent;

  b->silent = silent;
  if (old_silent != silent)
    gdb::observers::breakpoint_modified.notify (b);
}

/* Set the thread for this breakpoint.  If THREAD is -1, make the
   breakpoint work for any thread.  */

void
breakpoint_set_thread (struct breakpoint *b, int thread)
{
  int old_thread = b->thread;

  b->thread = thread;
  if (old_thread != thread)
    gdb::observers::breakpoint_modified.notify (b);
}

/* Set the task for this breakpoint.  If TASK is 0, make the
   breakpoint work for any task.  */

void
breakpoint_set_task (struct breakpoint *b, int task)
{
  int old_task = b->task;

  b->task = task;
  if (old_task != task)
    gdb::observers::breakpoint_modified.notify (b);
}

void
check_tracepoint_command (char *line, void *closure)
{
  struct breakpoint *b = (struct breakpoint *) closure;

  validate_actionline (line, b);
}

static void
commands_command_1 (const char *arg, int from_tty,
		    struct command_line *control)
{
  counted_command_line cmd;

  std::string new_arg;

  if (arg == NULL || !*arg)
    {
      if (breakpoint_count - prev_breakpoint_count > 1)
	new_arg = string_printf ("%d-%d", prev_breakpoint_count + 1,
				 breakpoint_count);
      else if (breakpoint_count > 0)
	new_arg = string_printf ("%d", breakpoint_count);
      arg = new_arg.c_str ();
    }

  map_breakpoint_numbers
    (arg, [&] (breakpoint *b)
     {
       if (cmd == NULL)
	 {
	   if (control != NULL)
	     cmd = copy_command_lines (control->body_list[0]);
	   else
	     {
	       std::string str
		 = string_printf (_("Type commands for breakpoint(s) "
				    "%s, one per line."),
				  arg);

	       cmd = read_command_lines (&str[0],
					 from_tty, 1,
					 (is_tracepoint (b)
					  ? check_tracepoint_command : 0),
					 b);
	     }
	 }

       /* If a breakpoint was on the list more than once, we don't need to
	  do anything.  */
       if (b->commands != cmd)
	 {
	   validate_commands_for_breakpoint (b, cmd.get ());
	   b->commands = cmd;
	   gdb::observers::breakpoint_modified.notify (b);
	 }
     });
}

static void
commands_command (const char *arg, int from_tty)
{
  commands_command_1 (arg, from_tty, NULL);
}

/* Like commands_command, but instead of reading the commands from
   input stream, takes them from an already parsed command structure.

   This is used by cli-script.c to DTRT with breakpoint commands
   that are part of if and while bodies.  */
enum command_control_type
commands_from_control_command (const char *arg, struct command_line *cmd)
{
  commands_command_1 (arg, 0, cmd);
  return simple_control;
}

/* Return non-zero if BL->TARGET_INFO contains valid information.  */

static int
bp_location_has_shadow (struct bp_location *bl)
{
  if (bl->loc_type != bp_loc_software_breakpoint)
    return 0;
  if (!bl->inserted)
    return 0;
  if (bl->target_info.shadow_len == 0)
    /* BL isn't valid, or doesn't shadow memory.  */
    return 0;
  return 1;
}

/* Update BUF, which is LEN bytes read from the target address
   MEMADDR, by replacing a memory breakpoint with its shadowed
   contents.

   If READBUF is not NULL, this buffer must not overlap with the of
   the breakpoint location's shadow_contents buffer.  Otherwise, a
   failed assertion internal error will be raised.  */

static void
one_breakpoint_xfer_memory (gdb_byte *readbuf, gdb_byte *writebuf,
			    const gdb_byte *writebuf_org,
			    ULONGEST memaddr, LONGEST len,
			    struct bp_target_info *target_info,
			    struct gdbarch *gdbarch)
{
  /* Now do full processing of the found relevant range of elements.  */
  CORE_ADDR bp_addr = 0;
  int bp_size = 0;
  int bptoffset = 0;

  if (!breakpoint_address_match (target_info->placed_address_space, 0,
				 current_program_space->aspace, 0))
    {
      /* The breakpoint is inserted in a different address space.  */
      return;
    }

  /* Addresses and length of the part of the breakpoint that
     we need to copy.  */
  bp_addr = target_info->placed_address;
  bp_size = target_info->shadow_len;

  if (bp_addr + bp_size <= memaddr)
    {
      /* The breakpoint is entirely before the chunk of memory we are
	 reading.  */
      return;
    }

  if (bp_addr >= memaddr + len)
    {
      /* The breakpoint is entirely after the chunk of memory we are
	 reading.  */
      return;
    }

  /* Offset within shadow_contents.  */
  if (bp_addr < memaddr)
    {
      /* Only copy the second part of the breakpoint.  */
      bp_size -= memaddr - bp_addr;
      bptoffset = memaddr - bp_addr;
      bp_addr = memaddr;
    }

  if (bp_addr + bp_size > memaddr + len)
    {
      /* Only copy the first part of the breakpoint.  */
      bp_size -= (bp_addr + bp_size) - (memaddr + len);
    }

  if (readbuf != NULL)
    {
      /* Verify that the readbuf buffer does not overlap with the
	 shadow_contents buffer.  */
      gdb_assert (target_info->shadow_contents >= readbuf + len
		  || readbuf >= (target_info->shadow_contents
				 + target_info->shadow_len));

      /* Update the read buffer with this inserted breakpoint's
	 shadow.  */
      memcpy (readbuf + bp_addr - memaddr,
	      target_info->shadow_contents + bptoffset, bp_size);
    }
  else
    {
      const unsigned char *bp;
      CORE_ADDR addr = target_info->reqstd_address;
      int placed_size;

      /* Update the shadow with what we want to write to memory.  */
      memcpy (target_info->shadow_contents + bptoffset,
	      writebuf_org + bp_addr - memaddr, bp_size);

      /* Determine appropriate breakpoint contents and size for this
	 address.  */
      bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &placed_size);

      /* Update the final write buffer with this inserted
	 breakpoint's INSN.  */
      memcpy (writebuf + bp_addr - memaddr, bp + bptoffset, bp_size);
    }
}

/* Update BUF, which is LEN bytes read from the target address MEMADDR,
   by replacing any memory breakpoints with their shadowed contents.

   If READBUF is not NULL, this buffer must not overlap with any of
   the breakpoint location's shadow_contents buffers.  Otherwise,
   a failed assertion internal error will be raised.

   The range of shadowed area by each bp_location is:
     bl->address - bp_locations_placed_address_before_address_max
     up to bl->address + bp_locations_shadow_len_after_address_max
   The range we were requested to resolve shadows for is:
     memaddr ... memaddr + len
   Thus the safe cutoff boundaries for performance optimization are
     memaddr + len <= (bl->address
		       - bp_locations_placed_address_before_address_max)
   and:
     bl->address + bp_locations_shadow_len_after_address_max <= memaddr  */

void
breakpoint_xfer_memory (gdb_byte *readbuf, gdb_byte *writebuf,
			const gdb_byte *writebuf_org,
			ULONGEST memaddr, LONGEST len)
{
  /* Left boundary, right boundary and median element of our binary
     search.  */
  unsigned bc_l, bc_r, bc;

  /* Find BC_L which is a leftmost element which may affect BUF
     content.  It is safe to report lower value but a failure to
     report higher one.  */

  bc_l = 0;
  bc_r = bp_locations_count;
  while (bc_l + 1 < bc_r)
    {
      struct bp_location *bl;

      bc = (bc_l + bc_r) / 2;
      bl = bp_locations[bc];

      /* Check first BL->ADDRESS will not overflow due to the added
	 constant.  Then advance the left boundary only if we are sure
	 the BC element can in no way affect the BUF content (MEMADDR
	 to MEMADDR + LEN range).

	 Use the BP_LOCATIONS_SHADOW_LEN_AFTER_ADDRESS_MAX safety
	 offset so that we cannot miss a breakpoint with its shadow
	 range tail still reaching MEMADDR.  */

      if ((bl->address + bp_locations_shadow_len_after_address_max
	   >= bl->address)
	  && (bl->address + bp_locations_shadow_len_after_address_max
	      <= memaddr))
	bc_l = bc;
      else
	bc_r = bc;
    }

  /* Due to the binary search above, we need to make sure we pick the
     first location that's at BC_L's address.  E.g., if there are
     multiple locations at the same address, BC_L may end up pointing
     at a duplicate location, and miss the "master"/"inserted"
     location.  Say, given locations L1, L2 and L3 at addresses A and
     B:

      L1@A, L2@A, L3@B, ...

     BC_L could end up pointing at location L2, while the "master"
     location could be L1.  Since the `loc->inserted' flag is only set
     on "master" locations, we'd forget to restore the shadow of L1
     and L2.  */
  while (bc_l > 0
	 && bp_locations[bc_l]->address == bp_locations[bc_l - 1]->address)
    bc_l--;

  /* Now do full processing of the found relevant range of elements.  */

  for (bc = bc_l; bc < bp_locations_count; bc++)
  {
    struct bp_location *bl = bp_locations[bc];

    /* bp_location array has BL->OWNER always non-NULL.  */
    if (bl->owner->type == bp_none)
      warning (_("reading through apparently deleted breakpoint #%d?"),
	       bl->owner->number);

    /* Performance optimization: any further element can no longer affect BUF
       content.  */

    if (bl->address >= bp_locations_placed_address_before_address_max
	&& memaddr + len <= (bl->address
			     - bp_locations_placed_address_before_address_max))
      break;

    if (!bp_location_has_shadow (bl))
      continue;

    one_breakpoint_xfer_memory (readbuf, writebuf, writebuf_org,
				memaddr, len, &bl->target_info, bl->gdbarch);
  }
}



/* Return true if BPT is either a software breakpoint or a hardware
   breakpoint.  */

int
is_breakpoint (const struct breakpoint *bpt)
{
  return (bpt->type == bp_breakpoint
	  || bpt->type == bp_hardware_breakpoint
	  || bpt->type == bp_dprintf);
}

/* Return true if BPT is of any hardware watchpoint kind.  */

static int
is_hardware_watchpoint (const struct breakpoint *bpt)
{
  return (bpt->type == bp_hardware_watchpoint
	  || bpt->type == bp_read_watchpoint
	  || bpt->type == bp_access_watchpoint);
}

/* Return true if BPT is of any watchpoint kind, hardware or
   software.  */

int
is_watchpoint (const struct breakpoint *bpt)
{
  return (is_hardware_watchpoint (bpt)
	  || bpt->type == bp_watchpoint);
}

/* Returns true if the current thread and its running state are safe
   to evaluate or update watchpoint B.  Watchpoints on local
   expressions need to be evaluated in the context of the thread that
   was current when the watchpoint was created, and, that thread needs
   to be stopped to be able to select the correct frame context.
   Watchpoints on global expressions can be evaluated on any thread,
   and in any state.  It is presently left to the target allowing
   memory accesses when threads are running.  */

static int
watchpoint_in_thread_scope (struct watchpoint *b)
{
  return (b->pspace == current_program_space
	  && (ptid_equal (b->watchpoint_thread, null_ptid)
	      || (ptid_equal (inferior_ptid, b->watchpoint_thread)
		  && !is_executing (inferior_ptid))));
}

/* Set watchpoint B to disp_del_at_next_stop, even including its possible
   associated bp_watchpoint_scope breakpoint.  */

static void
watchpoint_del_at_next_stop (struct watchpoint *w)
{
  if (w->related_breakpoint != w)
    {
      gdb_assert (w->related_breakpoint->type == bp_watchpoint_scope);
      gdb_assert (w->related_breakpoint->related_breakpoint == w);
      w->related_breakpoint->disposition = disp_del_at_next_stop;
      w->related_breakpoint->related_breakpoint = w->related_breakpoint;
      w->related_breakpoint = w;
    }
  w->disposition = disp_del_at_next_stop;
}

/* Extract a bitfield value from value VAL using the bit parameters contained in
   watchpoint W.  */

static struct value *
extract_bitfield_from_watchpoint_value (struct watchpoint *w, struct value *val)
{
  struct value *bit_val;

  if (val == NULL)
    return NULL;

  bit_val = allocate_value (value_type (val));

  unpack_value_bitfield (bit_val,
			 w->val_bitpos,
			 w->val_bitsize,
			 value_contents_for_printing (val),
			 value_offset (val),
			 val);

  return bit_val;
}

/* Allocate a dummy location and add it to B, which must be a software
   watchpoint.  This is required because even if a software watchpoint
   is not watching any memory, bpstat_stop_status requires a location
   to be able to report stops.  */

static void
software_watchpoint_add_no_memory_location (struct breakpoint *b,
					    struct program_space *pspace)
{
  gdb_assert (b->type == bp_watchpoint && b->loc == NULL);

  b->loc = allocate_bp_location (b);
  b->loc->pspace = pspace;
  b->loc->address = -1;
  b->loc->length = -1;
}

/* Returns true if B is a software watchpoint that is not watching any
   memory (e.g., "watch $pc").  */

static int
is_no_memory_software_watchpoint (struct breakpoint *b)
{
  return (b->type == bp_watchpoint
	  && b->loc != NULL
	  && b->loc->next == NULL
	  && b->loc->address == -1
	  && b->loc->length == -1);
}

/* Assuming that B is a watchpoint:
   - Reparse watchpoint expression, if REPARSE is non-zero
   - Evaluate expression and store the result in B->val
   - Evaluate the condition if there is one, and store the result
     in b->loc->cond.
   - Update the list of values that must be watched in B->loc.

   If the watchpoint disposition is disp_del_at_next_stop, then do
   nothing.  If this is local watchpoint that is out of scope, delete
   it.

   Even with `set breakpoint always-inserted on' the watchpoints are
   removed + inserted on each stop here.  Normal breakpoints must
   never be removed because they might be missed by a running thread
   when debugging in non-stop mode.  On the other hand, hardware
   watchpoints (is_hardware_watchpoint; processed here) are specific
   to each LWP since they are stored in each LWP's hardware debug
   registers.  Therefore, such LWP must be stopped first in order to
   be able to modify its hardware watchpoints.

   Hardware watchpoints must be reset exactly once after being
   presented to the user.  It cannot be done sooner, because it would
   reset the data used to present the watchpoint hit to the user.  And
   it must not be done later because it could display the same single
   watchpoint hit during multiple GDB stops.  Note that the latter is
   relevant only to the hardware watchpoint types bp_read_watchpoint
   and bp_access_watchpoint.  False hit by bp_hardware_watchpoint is
   not user-visible - its hit is suppressed if the memory content has
   not changed.

   The following constraints influence the location where we can reset
   hardware watchpoints:

   * target_stopped_by_watchpoint and target_stopped_data_address are
     called several times when GDB stops.

   [linux] 
   * Multiple hardware watchpoints can be hit at the same time,
     causing GDB to stop.  GDB only presents one hardware watchpoint
     hit at a time as the reason for stopping, and all the other hits
     are presented later, one after the other, each time the user
     requests the execution to be resumed.  Execution is not resumed
     for the threads still having pending hit event stored in
     LWP_INFO->STATUS.  While the watchpoint is already removed from
     the inferior on the first stop the thread hit event is kept being
     reported from its cached value by linux_nat_stopped_data_address
     until the real thread resume happens after the watchpoint gets
     presented and thus its LWP_INFO->STATUS gets reset.

   Therefore the hardware watchpoint hit can get safely reset on the
   watchpoint removal from inferior.  */

static void
update_watchpoint (struct watchpoint *b, int reparse)
{
  int within_current_scope;
  struct frame_id saved_frame_id;
  int frame_saved;

  /* If this is a local watchpoint, we only want to check if the
     watchpoint frame is in scope if the current thread is the thread
     that was used to create the watchpoint.  */
  if (!watchpoint_in_thread_scope (b))
    return;

  if (b->disposition == disp_del_at_next_stop)
    return;
 
  frame_saved = 0;

  /* Determine if the watchpoint is within scope.  */
  if (b->exp_valid_block == NULL)
    within_current_scope = 1;
  else
    {
      struct frame_info *fi = get_current_frame ();
      struct gdbarch *frame_arch = get_frame_arch (fi);
      CORE_ADDR frame_pc = get_frame_pc (fi);

      /* If we're at a point where the stack has been destroyed
	 (e.g. in a function epilogue), unwinding may not work
	 properly. Do not attempt to recreate locations at this
	 point.  See similar comments in watchpoint_check.  */
      if (gdbarch_stack_frame_destroyed_p (frame_arch, frame_pc))
	return;

      /* Save the current frame's ID so we can restore it after
         evaluating the watchpoint expression on its own frame.  */
      /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
         took a frame parameter, so that we didn't have to change the
         selected frame.  */
      frame_saved = 1;
      saved_frame_id = get_frame_id (get_selected_frame (NULL));

      fi = frame_find_by_id (b->watchpoint_frame);
      within_current_scope = (fi != NULL);
      if (within_current_scope)
	select_frame (fi);
    }

  /* We don't free locations.  They are stored in the bp_location array
     and update_global_location_list will eventually delete them and
     remove breakpoints if needed.  */
  b->loc = NULL;

  if (within_current_scope && reparse)
    {
      const char *s;

      b->exp.reset ();
      s = b->exp_string_reparse ? b->exp_string_reparse : b->exp_string;
      b->exp = parse_exp_1 (&s, 0, b->exp_valid_block, 0);
      /* If the meaning of expression itself changed, the old value is
	 no longer relevant.  We don't want to report a watchpoint hit
	 to the user when the old value and the new value may actually
	 be completely different objects.  */
      b->val = NULL;
      b->val_valid = 0;

      /* Note that unlike with breakpoints, the watchpoint's condition
	 expression is stored in the breakpoint object, not in the
	 locations (re)created below.  */
      if (b->cond_string != NULL)
	{
	  b->cond_exp.reset ();

	  s = b->cond_string;
	  b->cond_exp = parse_exp_1 (&s, 0, b->cond_exp_valid_block, 0);
	}
    }

  /* If we failed to parse the expression, for example because
     it refers to a global variable in a not-yet-loaded shared library,
     don't try to insert watchpoint.  We don't automatically delete
     such watchpoint, though, since failure to parse expression
     is different from out-of-scope watchpoint.  */
  if (!target_has_execution)
    {
      /* Without execution, memory can't change.  No use to try and
	 set watchpoint locations.  The watchpoint will be reset when
	 the target gains execution, through breakpoint_re_set.  */
      if (!can_use_hw_watchpoints)
	{
	  if (b->ops->works_in_software_mode (b))
	    b->type = bp_watchpoint;
	  else
	    error (_("Can't set read/access watchpoint when "
		     "hardware watchpoints are disabled."));
	}
    }
  else if (within_current_scope && b->exp)
    {
      int pc = 0;
      struct value *val_chain, *v, *result, *next;
      struct program_space *frame_pspace;

      fetch_subexp_value (b->exp.get (), &pc, &v, &result, &val_chain, 0);

      /* Avoid setting b->val if it's already set.  The meaning of
	 b->val is 'the last value' user saw, and we should update
	 it only if we reported that last value to user.  As it
	 happens, the code that reports it updates b->val directly.
	 We don't keep track of the memory value for masked
	 watchpoints.  */
      if (!b->val_valid && !is_masked_watchpoint (b))
	{
	  if (b->val_bitsize != 0)
	    v = extract_bitfield_from_watchpoint_value (b, v);
	  b->val = release_value (v);
	  b->val_valid = 1;
	}

      frame_pspace = get_frame_program_space (get_selected_frame (NULL));

      /* Look at each value on the value chain.  */
      for (v = val_chain; v; v = value_next (v))
	{
	  /* If it's a memory location, and GDB actually needed
	     its contents to evaluate the expression, then we
	     must watch it.  If the first value returned is
	     still lazy, that means an error occurred reading it;
	     watch it anyway in case it becomes readable.  */
	  if (VALUE_LVAL (v) == lval_memory
	      && (v == val_chain || ! value_lazy (v)))
	    {
	      struct type *vtype = check_typedef (value_type (v));

	      /* We only watch structs and arrays if user asked
		 for it explicitly, never if they just happen to
		 appear in the middle of some value chain.  */
	      if (v == result
		  || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
		      && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
		{
		  CORE_ADDR addr;
		  enum target_hw_bp_type type;
		  struct bp_location *loc, **tmp;
		  int bitpos = 0, bitsize = 0;

		  if (value_bitsize (v) != 0)
		    {
		      /* Extract the bit parameters out from the bitfield
			 sub-expression.  */
		      bitpos = value_bitpos (v);
		      bitsize = value_bitsize (v);
		    }
		  else if (v == result && b->val_bitsize != 0)
		    {
		     /* If VAL_BITSIZE != 0 then RESULT is actually a bitfield
			lvalue whose bit parameters are saved in the fields
			VAL_BITPOS and VAL_BITSIZE.  */
		      bitpos = b->val_bitpos;
		      bitsize = b->val_bitsize;
		    }

		  addr = value_address (v);
		  if (bitsize != 0)
		    {
		      /* Skip the bytes that don't contain the bitfield.  */
		      addr += bitpos / 8;
		    }

		  type = hw_write;
		  if (b->type == bp_read_watchpoint)
		    type = hw_read;
		  else if (b->type == bp_access_watchpoint)
		    type = hw_access;

		  loc = allocate_bp_location (b);
		  for (tmp = &(b->loc); *tmp != NULL; tmp = &((*tmp)->next))
		    ;
		  *tmp = loc;
		  loc->gdbarch = get_type_arch (value_type (v));

		  loc->pspace = frame_pspace;
		  loc->address = address_significant (loc->gdbarch, addr);

		  if (bitsize != 0)
		    {
		      /* Just cover the bytes that make up the bitfield.  */
		      loc->length = ((bitpos % 8) + bitsize + 7) / 8;
		    }
		  else
		    loc->length = TYPE_LENGTH (value_type (v));

		  loc->watchpoint_type = type;
		}
	    }
	}

      /* Change the type of breakpoint between hardware assisted or
	 an ordinary watchpoint depending on the hardware support
	 and free hardware slots.  REPARSE is set when the inferior
	 is started.  */
      if (reparse)
	{
	  int reg_cnt;
	  enum bp_loc_type loc_type;
	  struct bp_location *bl;

	  reg_cnt = can_use_hardware_watchpoint (val_chain);

	  if (reg_cnt)
	    {
	      int i, target_resources_ok, other_type_used;
	      enum bptype type;

	      /* Use an exact watchpoint when there's only one memory region to be
		 watched, and only one debug register is needed to watch it.  */
	      b->exact = target_exact_watchpoints && reg_cnt == 1;

	      /* We need to determine how many resources are already
		 used for all other hardware watchpoints plus this one
		 to see if we still have enough resources to also fit
		 this watchpoint in as well.  */

	      /* If this is a software watchpoint, we try to turn it
		 to a hardware one -- count resources as if B was of
		 hardware watchpoint type.  */
	      type = b->type;
	      if (type == bp_watchpoint)
		type = bp_hardware_watchpoint;

	      /* This watchpoint may or may not have been placed on
		 the list yet at this point (it won't be in the list
		 if we're trying to create it for the first time,
		 through watch_command), so always account for it
		 manually.  */

	      /* Count resources used by all watchpoints except B.  */
	      i = hw_watchpoint_used_count_others (b, type, &other_type_used);

	      /* Add in the resources needed for B.  */
	      i += hw_watchpoint_use_count (b);

	      target_resources_ok
		= target_can_use_hardware_watchpoint (type, i, other_type_used);
	      if (target_resources_ok <= 0)
		{
		  int sw_mode = b->ops->works_in_software_mode (b);

		  if (target_resources_ok == 0 && !sw_mode)
		    error (_("Target does not support this type of "
			     "hardware watchpoint."));
		  else if (target_resources_ok < 0 && !sw_mode)
		    error (_("There are not enough available hardware "
			     "resources for this watchpoint."));

		  /* Downgrade to software watchpoint.  */
		  b->type = bp_watchpoint;
		}
	      else
		{
		  /* If this was a software watchpoint, we've just
		     found we have enough resources to turn it to a
		     hardware watchpoint.  Otherwise, this is a
		     nop.  */
		  b->type = type;
		}
	    }
	  else if (!b->ops->works_in_software_mode (b))
	    {
	      if (!can_use_hw_watchpoints)
		error (_("Can't set read/access watchpoint when "
			 "hardware watchpoints are disabled."));
	      else
		error (_("Expression cannot be implemented with "
			 "read/access watchpoint."));
	    }
	  else
	    b->type = bp_watchpoint;

	  loc_type = (b->type == bp_watchpoint? bp_loc_other
		      : bp_loc_hardware_watchpoint);
	  for (bl = b->loc; bl; bl = bl->next)
	    bl->loc_type = loc_type;
	}

      for (v = val_chain; v; v = next)
	{
	  next = value_next (v);
	  if (v != b->val)
	    value_decref (v);
	}

      /* If a software watchpoint is not watching any memory, then the
	 above left it without any location set up.  But,
	 bpstat_stop_status requires a location to be able to report
	 stops, so make sure there's at least a dummy one.  */
      if (b->type == bp_watchpoint && b->loc == NULL)
	software_watchpoint_add_no_memory_location (b, frame_pspace);
    }
  else if (!within_current_scope)
    {
      printf_filtered (_("\
Watchpoint %d deleted because the program has left the block\n\
in which its expression is valid.\n"),
		       b->number);
      watchpoint_del_at_next_stop (b);
    }

  /* Restore the selected frame.  */
  if (frame_saved)
    select_frame (frame_find_by_id (saved_frame_id));
}


/* Returns 1 iff breakpoint location should be
   inserted in the inferior.  We don't differentiate the type of BL's owner
   (breakpoint vs. tracepoint), although insert_location in tracepoint's
   breakpoint_ops is not defined, because in insert_bp_location,
   tracepoint's insert_location will not be called.  */
static int
should_be_inserted (struct bp_location *bl)
{
  if (bl->owner == NULL || !breakpoint_enabled (bl->owner))
    return 0;

  if (bl->owner->disposition == disp_del_at_next_stop)
    return 0;

  if (!bl->enabled || bl->shlib_disabled || bl->duplicate)
    return 0;

  if (user_breakpoint_p (bl->owner) && bl->pspace->executing_startup)
    return 0;

  /* This is set for example, when we're attached to the parent of a
     vfork, and have detached from the child.  The child is running
     free, and we expect it to do an exec or exit, at which point the
     OS makes the parent schedulable again (and the target reports
     that the vfork is done).  Until the child is done with the shared
     memory region, do not insert breakpoints in the parent, otherwise
     the child could still trip on the parent's breakpoints.  Since
     the parent is blocked anyway, it won't miss any breakpoint.  */
  if (bl->pspace->breakpoints_not_allowed)
    return 0;

  /* Don't insert a breakpoint if we're trying to step past its
     location, except if the breakpoint is a single-step breakpoint,
     and the breakpoint's thread is the thread which is stepping past
     a breakpoint.  */
  if ((bl->loc_type == bp_loc_software_breakpoint
       || bl->loc_type == bp_loc_hardware_breakpoint)
      && stepping_past_instruction_at (bl->pspace->aspace,
				       bl->address)
      /* The single-step breakpoint may be inserted at the location
	 we're trying to step if the instruction branches to itself.
	 However, the instruction won't be executed at all and it may
	 break the semantics of the instruction, for example, the
	 instruction is a conditional branch or updates some flags.
	 We can't fix it unless GDB is able to emulate the instruction
	 or switch to displaced stepping.  */
      && !(bl->owner->type == bp_single_step
	   && thread_is_stepping_over_breakpoint (bl->owner->thread)))
    {
      if (debug_infrun)
	{
	  fprintf_unfiltered (gdb_stdlog,
			      "infrun: skipping breakpoint: "
			      "stepping past insn at: %s\n",
			      paddress (bl->gdbarch, bl->address));
	}
      return 0;
    }

  /* Don't insert watchpoints if we're trying to step past the
     instruction that triggered one.  */
  if ((bl->loc_type == bp_loc_hardware_watchpoint)
      && stepping_past_nonsteppable_watchpoint ())
    {
      if (debug_infrun)
	{
	  fprintf_unfiltered (gdb_stdlog,
			      "infrun: stepping past non-steppable watchpoint. "
			      "skipping watchpoint at %s:%d\n",
			      paddress (bl->gdbarch, bl->address),
			      bl->length);
	}
      return 0;
    }

  return 1;
}

/* Same as should_be_inserted but does the check assuming
   that the location is not duplicated.  */

static int
unduplicated_should_be_inserted (struct bp_location *bl)
{
  int result;
  const int save_duplicate = bl->duplicate;

  bl->duplicate = 0;
  result = should_be_inserted (bl);
  bl->duplicate = save_duplicate;
  return result;
}

/* Parses a conditional described by an expression COND into an
   agent expression bytecode suitable for evaluation
   by the bytecode interpreter.  Return NULL if there was
   any error during parsing.  */

static agent_expr_up
parse_cond_to_aexpr (CORE_ADDR scope, struct expression *cond)
{
  if (cond == NULL)
    return NULL;

  agent_expr_up aexpr;

  /* We don't want to stop processing, so catch any errors
     that may show up.  */
  TRY
    {
      aexpr = gen_eval_for_expr (scope, cond);
    }

  CATCH (ex, RETURN_MASK_ERROR)
    {
      /* If we got here, it means the condition could not be parsed to a valid
	 bytecode expression and thus can't be evaluated on the target's side.
	 It's no use iterating through the conditions.  */
    }
  END_CATCH

  /* We have a valid agent expression.  */
  return aexpr;
}

/* Based on location BL, create a list of breakpoint conditions to be
   passed on to the target.  If we have duplicated locations with different
   conditions, we will add such conditions to the list.  The idea is that the
   target will evaluate the list of conditions and will only notify GDB when
   one of them is true.  */

static void
build_target_condition_list (struct bp_location *bl)
{
  struct bp_location **locp = NULL, **loc2p;
  int null_condition_or_parse_error = 0;
  int modified = bl->needs_update;
  struct bp_location *loc;

  /* Release conditions left over from a previous insert.  */
  bl->target_info.conditions.clear ();

  /* This is only meaningful if the target is
     evaluating conditions and if the user has
     opted for condition evaluation on the target's
     side.  */
  if (gdb_evaluates_breakpoint_condition_p ()
      || !target_supports_evaluation_of_breakpoint_conditions ())
    return;

  /* Do a first pass to check for locations with no assigned
     conditions or conditions that fail to parse to a valid agent expression
     bytecode.  If any of these happen, then it's no use to send conditions
     to the target since this location will always trigger and generate a
     response back to GDB.  */
  ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
    {
      loc = (*loc2p);
      if (is_breakpoint (loc->owner) && loc->pspace->num == bl->pspace->num)
	{
	  if (modified)
	    {
	      /* Re-parse the conditions since something changed.  In that
		 case we already freed the condition bytecodes (see
		 force_breakpoint_reinsertion).  We just
		 need to parse the condition to bytecodes again.  */
	      loc->cond_bytecode = parse_cond_to_aexpr (bl->address,
							loc->cond.get ());
	    }

	  /* If we have a NULL bytecode expression, it means something
	     went wrong or we have a null condition expression.  */
	  if (!loc->cond_bytecode)
	    {
	      null_condition_or_parse_error = 1;
	      break;
	    }
	}
    }

  /* If any of these happened, it means we will have to evaluate the conditions
     for the location's address on gdb's side.  It is no use keeping bytecodes
     for all the other duplicate locations, thus we free all of them here.

     This is so we have a finer control over which locations' conditions are
     being evaluated by GDB or the remote stub.  */
  if (null_condition_or_parse_error)
    {
      ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
	{
	  loc = (*loc2p);
	  if (is_breakpoint (loc->owner) && loc->pspace->num == bl->pspace->num)
	    {
	      /* Only go as far as the first NULL bytecode is
		 located.  */
	      if (!loc->cond_bytecode)
		return;

	      loc->cond_bytecode.reset ();
	    }
	}
    }

  /* No NULL conditions or failed bytecode generation.  Build a condition list
     for this location's address.  */
  ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
    {
      loc = (*loc2p);
      if (loc->cond
	  && is_breakpoint (loc->owner)
	  && loc->pspace->num == bl->pspace->num
	  && loc->owner->enable_state == bp_enabled
	  && loc->enabled)
	{
	  /* Add the condition to the vector.  This will be used later
	     to send the conditions to the target.  */
	  bl->target_info.conditions.push_back (loc->cond_bytecode.get ());
	}
    }

  return;
}

/* Parses a command described by string CMD into an agent expression
   bytecode suitable for evaluation by the bytecode interpreter.
   Return NULL if there was any error during parsing.  */

static agent_expr_up
parse_cmd_to_aexpr (CORE_ADDR scope, char *cmd)
{
  const char *cmdrest;
  const char *format_start, *format_end;
  struct gdbarch *gdbarch = get_current_arch ();

  if (cmd == NULL)
    return NULL;

  cmdrest = cmd;

  if (*cmdrest == ',')
    ++cmdrest;
  cmdrest = skip_spaces (cmdrest);

  if (*cmdrest++ != '"')
    error (_("No format string following the location"));

  format_start = cmdrest;

  format_pieces fpieces (&cmdrest);

  format_end = cmdrest;

  if (*cmdrest++ != '"')
    error (_("Bad format string, non-terminated '\"'."));
  
  cmdrest = skip_spaces (cmdrest);

  if (!(*cmdrest == ',' || *cmdrest == '\0'))
    error (_("Invalid argument syntax"));

  if (*cmdrest == ',')
    cmdrest++;
  cmdrest = skip_spaces (cmdrest);

  /* For each argument, make an expression.  */

  std::vector<struct expression *> argvec;
  while (*cmdrest != '\0')
    {
      const char *cmd1;

      cmd1 = cmdrest;
      expression_up expr = parse_exp_1 (&cmd1, scope, block_for_pc (scope), 1);
      argvec.push_back (expr.release ());
      cmdrest = cmd1;
      if (*cmdrest == ',')
	++cmdrest;
    }

  agent_expr_up aexpr;

  /* We don't want to stop processing, so catch any errors
     that may show up.  */
  TRY
    {
      aexpr = gen_printf (scope, gdbarch, 0, 0,
			  format_start, format_end - format_start,
			  argvec.size (), argvec.data ());
    }
  CATCH (ex, RETURN_MASK_ERROR)
    {
      /* If we got here, it means the command could not be parsed to a valid
	 bytecode expression and thus can't be evaluated on the target's side.
	 It's no use iterating through the other commands.  */
    }
  END_CATCH

  /* We have a valid agent expression, return it.  */
  return aexpr;
}

/* Based on location BL, create a list of breakpoint commands to be
   passed on to the target.  If we have duplicated locations with
   different commands, we will add any such to the list.  */

static void
build_target_command_list (struct bp_location *bl)
{
  struct bp_location **locp = NULL, **loc2p;
  int null_command_or_parse_error = 0;
  int modified = bl->needs_update;
  struct bp_location *loc;

  /* Clear commands left over from a previous insert.  */
  bl->target_info.tcommands.clear ();

  if (!target_can_run_breakpoint_commands ())
    return;

  /* For now, limit to agent-style dprintf breakpoints.  */
  if (dprintf_style != dprintf_style_agent)
    return;

  /* For now, if we have any duplicate location that isn't a dprintf,
     don't install the target-side commands, as that would make the
     breakpoint not be reported to the core, and we'd lose
     control.  */
  ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
    {
      loc = (*loc2p);
      if (is_breakpoint (loc->owner)
	  && loc->pspace->num == bl->pspace->num
	  && loc->owner->type != bp_dprintf)
	return;
    }

  /* Do a first pass to check for locations with no assigned
     conditions or conditions that fail to parse to a valid agent expression
     bytecode.  If any of these happen, then it's no use to send conditions
     to the target since this location will always trigger and generate a
     response back to GDB.  */
  ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
    {
      loc = (*loc2p);
      if (is_breakpoint (loc->owner) && loc->pspace->num == bl->pspace->num)
	{
	  if (modified)
	    {
	      /* Re-parse the commands since something changed.  In that
		 case we already freed the command bytecodes (see
		 force_breakpoint_reinsertion).  We just
		 need to parse the command to bytecodes again.  */
	      loc->cmd_bytecode
		= parse_cmd_to_aexpr (bl->address,
				      loc->owner->extra_string);
	    }

	  /* If we have a NULL bytecode expression, it means something
	     went wrong or we have a null command expression.  */
	  if (!loc->cmd_bytecode)
	    {
	      null_command_or_parse_error = 1;
	      break;
	    }
	}
    }

  /* If anything failed, then we're not doing target-side commands,
     and so clean up.  */
  if (null_command_or_parse_error)
    {
      ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
	{
	  loc = (*loc2p);
	  if (is_breakpoint (loc->owner)
	      && loc->pspace->num == bl->pspace->num)
	    {
	      /* Only go as far as the first NULL bytecode is
		 located.  */
	      if (loc->cmd_bytecode == NULL)
		return;

	      loc->cmd_bytecode.reset ();
	    }
	}
    }

  /* No NULL commands or failed bytecode generation.  Build a command list
     for this location's address.  */
  ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
    {
      loc = (*loc2p);
      if (loc->owner->extra_string
	  && is_breakpoint (loc->owner)
	  && loc->pspace->num == bl->pspace->num
	  && loc->owner->enable_state == bp_enabled
	  && loc->enabled)
	{
	  /* Add the command to the vector.  This will be used later
	     to send the commands to the target.  */
	  bl->target_info.tcommands.push_back (loc->cmd_bytecode.get ());
	}
    }

  bl->target_info.persist = 0;
  /* Maybe flag this location as persistent.  */
  if (bl->owner->type == bp_dprintf && disconnected_dprintf)
    bl->target_info.persist = 1;
}

/* Return the kind of breakpoint on address *ADDR.  Get the kind
   of breakpoint according to ADDR except single-step breakpoint.
   Get the kind of single-step breakpoint according to the current
   registers state.  */

static int
breakpoint_kind (struct bp_location *bl, CORE_ADDR *addr)
{
  if (bl->owner->type == bp_single_step)
    {
      struct thread_info *thr = find_thread_global_id (bl->owner->thread);
      struct regcache *regcache;

      regcache = get_thread_regcache (thr->ptid);

      return gdbarch_breakpoint_kind_from_current_state (bl->gdbarch,
							 regcache, addr);
    }
  else
    return gdbarch_breakpoint_kind_from_pc (bl->gdbarch, addr);
}

/* Insert a low-level "breakpoint" of some type.  BL is the breakpoint
   location.  Any error messages are printed to TMP_ERROR_STREAM; and
   DISABLED_BREAKS, and HW_BREAKPOINT_ERROR are used to report problems.
   Returns 0 for success, 1 if the bp_location type is not supported or
   -1 for failure.

   NOTE drow/2003-09-09: This routine could be broken down to an
   object-style method for each breakpoint or catchpoint type.  */
static int
insert_bp_location (struct bp_location *bl,
		    struct ui_file *tmp_error_stream,
		    int *disabled_breaks,
		    int *hw_breakpoint_error,
		    int *hw_bp_error_explained_already)
{
  gdb_exception bp_excpt = exception_none;

  if (!should_be_inserted (bl) || (bl->inserted && !bl->needs_update))
    return 0;

  /* Note we don't initialize bl->target_info, as that wipes out
     the breakpoint location's shadow_contents if the breakpoint
     is still inserted at that location.  This in turn breaks
     target_read_memory which depends on these buffers when
     a memory read is requested at the breakpoint location:
     Once the target_info has been wiped, we fail to see that
     we have a breakpoint inserted at that address and thus
     read the breakpoint instead of returning the data saved in
     the breakpoint location's shadow contents.  */
  bl->target_info.reqstd_address = bl->address;
  bl->target_info.placed_address_space = bl->pspace->aspace;
  bl->target_info.length = bl->length;

  /* When working with target-side conditions, we must pass all the conditions
     for the same breakpoint address down to the target since GDB will not
     insert those locations.  With a list of breakpoint conditions, the target
     can decide when to stop and notify GDB.  */

  if (is_breakpoint (bl->owner))
    {
      build_target_condition_list (bl);
      build_target_command_list (bl);
      /* Reset the modification marker.  */
      bl->needs_update = 0;
    }

  if (bl->loc_type == bp_loc_software_breakpoint
      || bl->loc_type == bp_loc_hardware_breakpoint)
    {
      if (bl->owner->type != bp_hardware_breakpoint)
	{
	  /* If the explicitly specified breakpoint type
	     is not hardware breakpoint, check the memory map to see
	     if the breakpoint address is in read only memory or not.

	     Two important cases are:
	     - location type is not hardware breakpoint, memory
	     is readonly.  We change the type of the location to
	     hardware breakpoint.
	     - location type is hardware breakpoint, memory is
	     read-write.  This means we've previously made the
	     location hardware one, but then the memory map changed,
	     so we undo.
	     
	     When breakpoints are removed, remove_breakpoints will use
	     location types we've just set here, the only possible
	     problem is that memory map has changed during running
	     program, but it's not going to work anyway with current
	     gdb.  */
	  struct mem_region *mr 
	    = lookup_mem_region (bl->target_info.reqstd_address);
	  
	  if (mr)
	    {
	      if (automatic_hardware_breakpoints)
		{
		  enum bp_loc_type new_type;
		  
		  if (mr->attrib.mode != MEM_RW)
		    new_type = bp_loc_hardware_breakpoint;
		  else 
		    new_type = bp_loc_software_breakpoint;
		  
		  if (new_type != bl->loc_type)
		    {
		      static int said = 0;

		      bl->loc_type = new_type;
		      if (!said)
			{
			  fprintf_filtered (gdb_stdout,
					    _("Note: automatically using "
					      "hardware breakpoints for "
					      "read-only addresses.\n"));
			  said = 1;
			}
		    }
		}
	      else if (bl->loc_type == bp_loc_software_breakpoint
		       && mr->attrib.mode != MEM_RW)
		{
		  fprintf_unfiltered (tmp_error_stream,
				      _("Cannot insert breakpoint %d.\n"
					"Cannot set software breakpoint "
					"at read-only address %s\n"),
				      bl->owner->number,
				      paddress (bl->gdbarch, bl->address));
		  return 1;
		}
	    }
	}
        
      /* First check to see if we have to handle an overlay.  */
      if (overlay_debugging == ovly_off
	  || bl->section == NULL
	  || !(section_is_overlay (bl->section)))
	{
	  /* No overlay handling: just set the breakpoint.  */
	  TRY
	    {
	      int val;

	      val = bl->owner->ops->insert_location (bl);
	      if (val)
		bp_excpt = gdb_exception {RETURN_ERROR, GENERIC_ERROR};
	    }
	  CATCH (e, RETURN_MASK_ALL)
	    {
	      bp_excpt = e;
	    }
	  END_CATCH
	}
      else
	{
	  /* This breakpoint is in an overlay section.
	     Shall we set a breakpoint at the LMA?  */
	  if (!overlay_events_enabled)
	    {
	      /* Yes -- overlay event support is not active, 
		 so we must try to set a breakpoint at the LMA.
		 This will not work for a hardware breakpoint.  */
	      if (bl->loc_type == bp_loc_hardware_breakpoint)
		warning (_("hardware breakpoint %d not supported in overlay!"),
			 bl->owner->number);
	      else
		{
		  CORE_ADDR addr = overlay_unmapped_address (bl->address,
							     bl->section);
		  /* Set a software (trap) breakpoint at the LMA.  */
		  bl->overlay_target_info = bl->target_info;
		  bl->overlay_target_info.reqstd_address = addr;

		  /* No overlay handling: just set the breakpoint.  */
		  TRY
		    {
		      int val;

		      bl->overlay_target_info.kind
			= breakpoint_kind (bl, &addr);
		      bl->overlay_target_info.placed_address = addr;
		      val = target_insert_breakpoint (bl->gdbarch,
						      &bl->overlay_target_info);
		      if (val)
			bp_excpt
			  = gdb_exception {RETURN_ERROR, GENERIC_ERROR};
		    }
		  CATCH (e, RETURN_MASK_ALL)
		    {
		      bp_excpt = e;
		    }
		  END_CATCH

		  if (bp_excpt.reason != 0)
		    fprintf_unfiltered (tmp_error_stream,
					"Overlay breakpoint %d "
					"failed: in ROM?\n",
					bl->owner->number);
		}
	    }
	  /* Shall we set a breakpoint at the VMA? */
	  if (section_is_mapped (bl->section))
	    {
	      /* Yes.  This overlay section is mapped into memory.  */
	      TRY
	        {
		  int val;

	          val = bl->owner->ops->insert_location (bl);
		  if (val)
		    bp_excpt = gdb_exception {RETURN_ERROR, GENERIC_ERROR};
	        }
	      CATCH (e, RETURN_MASK_ALL)
	        {
		  bp_excpt = e;
	        }
	      END_CATCH
	    }
	  else
	    {
	      /* No.  This breakpoint will not be inserted.  
		 No error, but do not mark the bp as 'inserted'.  */
	      return 0;
	    }
	}

      if (bp_excpt.reason != 0)
	{
	  /* Can't set the breakpoint.  */

	  /* In some cases, we might not be able to insert a
	     breakpoint in a shared library that has already been
	     removed, but we have not yet processed the shlib unload
	     event.  Unfortunately, some targets that implement
	     breakpoint insertion themselves can't tell why the
	     breakpoint insertion failed (e.g., the remote target
	     doesn't define error codes), so we must treat generic
	     errors as memory errors.  */
	  if (bp_excpt.reason == RETURN_ERROR
	      && (bp_excpt.error == GENERIC_ERROR
		  || bp_excpt.error == MEMORY_ERROR)
	      && bl->loc_type == bp_loc_software_breakpoint
	      && (solib_name_from_address (bl->pspace, bl->address)
		  || shared_objfile_contains_address_p (bl->pspace,
							bl->address)))
	    {
	      /* See also: disable_breakpoints_in_shlibs.  */
	      bl->shlib_disabled = 1;
	      gdb::observers::breakpoint_modified.notify (bl->owner);
	      if (!*disabled_breaks)
		{
		  fprintf_unfiltered (tmp_error_stream, 
				      "Cannot insert breakpoint %d.\n", 
				      bl->owner->number);
		  fprintf_unfiltered (tmp_error_stream, 
				      "Temporarily disabling shared "
				      "library breakpoints:\n");
		}
	      *disabled_breaks = 1;
	      fprintf_unfiltered (tmp_error_stream,
				  "breakpoint #%d\n", bl->owner->number);
	      return 0;
	    }
	  else
	    {
	      if (bl->loc_type == bp_loc_hardware_breakpoint)
		{
		  *hw_breakpoint_error = 1;
		  *hw_bp_error_explained_already = bp_excpt.message != NULL;
                  fprintf_unfiltered (tmp_error_stream,
                                      "Cannot insert hardware breakpoint %d%s",
                                      bl->owner->number,
				      bp_excpt.message ? ":" : ".\n");
                  if (bp_excpt.message != NULL)
                    fprintf_unfiltered (tmp_error_stream, "%s.\n",
					bp_excpt.message);
		}
	      else
		{
		  if (bp_excpt.message == NULL)
		    {
		      std::string message
			= memory_error_message (TARGET_XFER_E_IO,
						bl->gdbarch, bl->address);

		      fprintf_unfiltered (tmp_error_stream,
					  "Cannot insert breakpoint %d.\n"
					  "%s\n",
					  bl->owner->number, message.c_str ());
		    }
		  else
		    {
		      fprintf_unfiltered (tmp_error_stream,
					  "Cannot insert breakpoint %d: %s\n",
					  bl->owner->number,
					  bp_excpt.message);
		    }
		}
	      return 1;

	    }
	}
      else
	bl->inserted = 1;

      return 0;
    }

  else if (bl->loc_type == bp_loc_hardware_watchpoint
	   /* NOTE drow/2003-09-08: This state only exists for removing
	      watchpoints.  It's not clear that it's necessary...  */
	   && bl->owner->disposition != disp_del_at_next_stop)
    {
      int val;

      gdb_assert (bl->owner->ops != NULL
		  && bl->owner->ops->insert_location != NULL);

      val = bl->owner->ops->insert_location (bl);

      /* If trying to set a read-watchpoint, and it turns out it's not
	 supported, try emulating one with an access watchpoint.  */
      if (val == 1 && bl->watchpoint_type == hw_read)
	{
	  struct bp_location *loc, **loc_temp;

	  /* But don't try to insert it, if there's already another
	     hw_access location that would be considered a duplicate
	     of this one.  */
	  ALL_BP_LOCATIONS (loc, loc_temp)
	    if (loc != bl
		&& loc->watchpoint_type == hw_access
		&& watchpoint_locations_match (bl, loc))
	      {
		bl->duplicate = 1;
		bl->inserted = 1;
		bl->target_info = loc->target_info;
		bl->watchpoint_type = hw_access;
		val = 0;
		break;
	      }

	  if (val == 1)
	    {
	      bl->watchpoint_type = hw_access;
	      val = bl->owner->ops->insert_location (bl);

	      if (val)
		/* Back to the original value.  */
		bl->watchpoint_type = hw_read;
	    }
	}

      bl->inserted = (val == 0);
    }

  else if (bl->owner->type == bp_catchpoint)
    {
      int val;

      gdb_assert (bl->owner->ops != NULL
		  && bl->owner->ops->insert_location != NULL);

      val = bl->owner->ops->insert_location (bl);
      if (val)
	{
	  bl->owner->enable_state = bp_disabled;

	  if (val == 1)
	    warning (_("\
Error inserting catchpoint %d: Your system does not support this type\n\
of catchpoint."), bl->owner->number);
	  else
	    warning (_("Error inserting catchpoint %d."), bl->owner->number);
	}

      bl->inserted = (val == 0);

      /* We've already printed an error message if there was a problem
	 inserting this catchpoint, and we've disabled the catchpoint,
	 so just return success.  */
      return 0;
    }

  return 0;
}

/* This function is called when program space PSPACE is about to be
   deleted.  It takes care of updating breakpoints to not reference
   PSPACE anymore.  */

void
breakpoint_program_space_exit (struct program_space *pspace)
{
  struct breakpoint *b, *b_temp;
  struct bp_location *loc, **loc_temp;

  /* Remove any breakpoint that was set through this program space.  */
  ALL_BREAKPOINTS_SAFE (b, b_temp)
    {
      if (b->pspace == pspace)
	delete_breakpoint (b);
    }

  /* Breakpoints set through other program spaces could have locations
     bound to PSPACE as well.  Remove those.  */
  ALL_BP_LOCATIONS (loc, loc_temp)
    {
      struct bp_location *tmp;

      if (loc->pspace == pspace)
	{
	  /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL.  */
	  if (loc->owner->loc == loc)
	    loc->owner->loc = loc->next;
	  else
	    for (tmp = loc->owner->loc; tmp->next != NULL; tmp = tmp->next)
	      if (tmp->next == loc)
		{
		  tmp->next = loc->next;
		  break;
		}
	}
    }

  /* Now update the global location list to permanently delete the
     removed locations above.  */
  update_global_location_list (UGLL_DONT_INSERT);
}

/* Make sure all breakpoints are inserted in inferior.
   Throws exception on any error.
   A breakpoint that is already inserted won't be inserted
   again, so calling this function twice is safe.  */
void
insert_breakpoints (void)
{
  struct breakpoint *bpt;

  ALL_BREAKPOINTS (bpt)
    if (is_hardware_watchpoint (bpt))
      {
	struct watchpoint *w = (struct watchpoint *) bpt;

	update_watchpoint (w, 0 /* don't reparse.  */);
      }

  /* Updating watchpoints creates new locations, so update the global
     location list.  Explicitly tell ugll to insert locations and
     ignore breakpoints_always_inserted_mode.  */
  update_global_location_list (UGLL_INSERT);
}

/* Invoke CALLBACK for each of bp_location.  */

void
iterate_over_bp_locations (walk_bp_location_callback callback)
{
  struct bp_location *loc, **loc_tmp;

  ALL_BP_LOCATIONS (loc, loc_tmp)
    {
      callback (loc, NULL);
    }
}

/* This is used when we need to synch breakpoint conditions between GDB and the
   target.  It is the case with deleting and disabling of breakpoints when using
   always-inserted mode.  */

static void
update_inserted_breakpoint_locations (void)
{
  struct bp_location *bl, **blp_tmp;
  int error_flag = 0;
  int val = 0;
  int disabled_breaks = 0;
  int hw_breakpoint_error = 0;
  int hw_bp_details_reported = 0;

  string_file tmp_error_stream;

  /* Explicitly mark the warning -- this will only be printed if
     there was an error.  */
  tmp_error_stream.puts ("Warning:\n");

  scoped_restore_current_pspace_and_thread restore_pspace_thread;

  ALL_BP_LOCATIONS (bl, blp_tmp)
    {
      /* We only want to update software breakpoints and hardware
	 breakpoints.  */
      if (!is_breakpoint (bl->owner))
	continue;

      /* We only want to update locations that are already inserted
	 and need updating.  This is to avoid unwanted insertion during
	 deletion of breakpoints.  */
      if (!bl->inserted || (bl->inserted && !bl->needs_update))
	continue;

      switch_to_program_space_and_thread (bl->pspace);

      /* For targets that support global breakpoints, there's no need
	 to select an inferior to insert breakpoint to.  In fact, even
	 if we aren't attached to any process yet, we should still
	 insert breakpoints.  */
      if (!gdbarch_has_global_breakpoints (target_gdbarch ())
	  && ptid_equal (inferior_ptid, null_ptid))
	continue;

      val = insert_bp_location (bl, &tmp_error_stream, &disabled_breaks,
				    &hw_breakpoint_error, &hw_bp_details_reported);
      if (val)
	error_flag = val;
    }

  if (error_flag)
    {
      target_terminal::ours_for_output ();
      error_stream (tmp_error_stream);
    }
}

/* Used when starting or continuing the program.  */

static void
insert_breakpoint_locations (void)
{
  struct breakpoint *bpt;
  struct bp_location *bl, **blp_tmp;
  int error_flag = 0;
  int val = 0;
  int disabled_breaks = 0;
  int hw_breakpoint_error = 0;
  int hw_bp_error_explained_already = 0;

  string_file tmp_error_stream;

  /* Explicitly mark the warning -- this will only be printed if
     there was an error.  */
  tmp_error_stream.puts ("Warning:\n");

  scoped_restore_current_pspace_and_thread restore_pspace_thread;

  ALL_BP_LOCATIONS (bl, blp_tmp)
    {
      if (!should_be_inserted (bl) || (bl->inserted && !bl->needs_update))
	continue;

      /* There is no point inserting thread-specific breakpoints if
	 the thread no longer exists.  ALL_BP_LOCATIONS bp_location
	 has BL->OWNER always non-NULL.  */
      if (bl->owner->thread != -1
	  && !valid_global_thread_id (bl->owner->thread))
	continue;

      switch_to_program_space_and_thread (bl->pspace);

      /* For targets that support global breakpoints, there's no need
	 to select an inferior to insert breakpoint to.  In fact, even
	 if we aren't attached to any process yet, we should still
	 insert breakpoints.  */
      if (!gdbarch_has_global_breakpoints (target_gdbarch ())
	  && ptid_equal (inferior_ptid, null_ptid))
	continue;

      val = insert_bp_location (bl, &tmp_error_stream, &disabled_breaks,
				    &hw_breakpoint_error, &hw_bp_error_explained_already);
      if (val)
	error_flag = val;
    }

  /* If we failed to insert all locations of a watchpoint, remove
     them, as half-inserted watchpoint is of limited use.  */
  ALL_BREAKPOINTS (bpt)  
    {
      int some_failed = 0;
      struct bp_location *loc;

      if (!is_hardware_watchpoint (bpt))
	continue;

      if (!breakpoint_enabled (bpt))
	continue;

      if (bpt->disposition == disp_del_at_next_stop)
	continue;
      
      for (loc = bpt->loc; loc; loc = loc->next)
	if (!loc->inserted && should_be_inserted (loc))
	  {
	    some_failed = 1;
	    break;
	  }
      if (some_failed)
	{
	  for (loc = bpt->loc; loc; loc = loc->next)
	    if (loc->inserted)
	      remove_breakpoint (loc);

	  hw_breakpoint_error = 1;
	  tmp_error_stream.printf ("Could not insert "
				   "hardware watchpoint %d.\n",
				   bpt->number);
	  error_flag = -1;
	}
    }

  if (error_flag)
    {
      /* If a hardware breakpoint or watchpoint was inserted, add a
         message about possibly exhausted resources.  */
      if (hw_breakpoint_error && !hw_bp_error_explained_already)
	{
	  tmp_error_stream.printf ("Could not insert hardware breakpoints:\n\
You may have requested too many hardware breakpoints/watchpoints.\n");
	}
      target_terminal::ours_for_output ();
      error_stream (tmp_error_stream);
    }
}

/* Used when the program stops.
   Returns zero if successful, or non-zero if there was a problem
   removing a breakpoint location.  */

int
remove_breakpoints (void)
{
  struct bp_location *bl, **blp_tmp;
  int val = 0;

  ALL_BP_LOCATIONS (bl, blp_tmp)
  {
    if (bl->inserted && !is_tracepoint (bl->owner))
      val |= remove_breakpoint (bl);
  }
  return val;
}

/* When a thread exits, remove breakpoints that are related to
   that thread.  */

static void
remove_threaded_breakpoints (struct thread_info *tp, int silent)
{
  struct breakpoint *b, *b_tmp;

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
    {
      if (b->thread == tp->global_num && user_breakpoint_p (b))
	{
	  b->disposition = disp_del_at_next_stop;

	  printf_filtered (_("\
Thread-specific breakpoint %d deleted - thread %s no longer in the thread list.\n"),
			   b->number, print_thread_id (tp));

	  /* Hide it from the user.  */
	  b->number = 0;
       }
    }
}

/* Remove breakpoints of process PID.  */

int
remove_breakpoints_pid (int pid)
{
  struct bp_location *bl, **blp_tmp;
  int val;
  struct inferior *inf = find_inferior_pid (pid);

  ALL_BP_LOCATIONS (bl, blp_tmp)
  {
    if (bl->pspace != inf->pspace)
      continue;

    if (bl->inserted && !bl->target_info.persist)
      {
	val = remove_breakpoint (bl);
	if (val != 0)
	  return val;
      }
  }
  return 0;
}

static int internal_breakpoint_number = -1;

/* Set the breakpoint number of B, depending on the value of INTERNAL.
   If INTERNAL is non-zero, the breakpoint number will be populated
   from internal_breakpoint_number and that variable decremented.
   Otherwise the breakpoint number will be populated from
   breakpoint_count and that value incremented.  Internal breakpoints
   do not set the internal var bpnum.  */
static void
set_breakpoint_number (int internal, struct breakpoint *b)
{
  if (internal)
    b->number = internal_breakpoint_number--;
  else
    {
      set_breakpoint_count (breakpoint_count + 1);
      b->number = breakpoint_count;
    }
}

static struct breakpoint *
create_internal_breakpoint (struct gdbarch *gdbarch,
			    CORE_ADDR address, enum bptype type,
			    const struct breakpoint_ops *ops)
{
  symtab_and_line sal;
  sal.pc = address;
  sal.section = find_pc_overlay (sal.pc);
  sal.pspace = current_program_space;

  breakpoint *b = set_raw_breakpoint (gdbarch, sal, type, ops);
  b->number = internal_breakpoint_number--;
  b->disposition = disp_donttouch;

  return b;
}

static const char *const longjmp_names[] =
  {
    "longjmp", "_longjmp", "siglongjmp", "_siglongjmp"
  };
#define NUM_LONGJMP_NAMES ARRAY_SIZE(longjmp_names)

/* Per-objfile data private to breakpoint.c.  */
struct breakpoint_objfile_data
{
  /* Minimal symbol for "_ovly_debug_event" (if any).  */
  struct bound_minimal_symbol overlay_msym {};

  /* Minimal symbol(s) for "longjmp", "siglongjmp", etc. (if any).  */
  struct bound_minimal_symbol longjmp_msym[NUM_LONGJMP_NAMES] {};

  /* True if we have looked for longjmp probes.  */
  int longjmp_searched = 0;

  /* SystemTap probe points for longjmp (if any).  These are non-owning
     references.  */
  std::vector<probe *> longjmp_probes;

  /* Minimal symbol for "std::terminate()" (if any).  */
  struct bound_minimal_symbol terminate_msym {};

  /* Minimal symbol for "_Unwind_DebugHook" (if any).  */
  struct bound_minimal_symbol exception_msym {};

  /* True if we have looked for exception probes.  */
  int exception_searched = 0;

  /* SystemTap probe points for unwinding (if any).  These are non-owning
     references.  */
  std::vector<probe *> exception_probes;
};

static const struct objfile_data *breakpoint_objfile_key;

/* Minimal symbol not found sentinel.  */
static struct minimal_symbol msym_not_found;

/* Returns TRUE if MSYM point to the "not found" sentinel.  */

static int
msym_not_found_p (const struct minimal_symbol *msym)
{
  return msym == &msym_not_found;
}

/* Return per-objfile data needed by breakpoint.c.
   Allocate the data if necessary.  */

static struct breakpoint_objfile_data *
get_breakpoint_objfile_data (struct objfile *objfile)
{
  struct breakpoint_objfile_data *bp_objfile_data;

  bp_objfile_data = ((struct breakpoint_objfile_data *)
		     objfile_data (objfile, breakpoint_objfile_key));
  if (bp_objfile_data == NULL)
    {
      bp_objfile_data = new breakpoint_objfile_data ();
      set_objfile_data (objfile, breakpoint_objfile_key, bp_objfile_data);
    }
  return bp_objfile_data;
}

static void
free_breakpoint_objfile_data (struct objfile *obj, void *data)
{
  struct breakpoint_objfile_data *bp_objfile_data
    = (struct breakpoint_objfile_data *) data;

  delete bp_objfile_data;
}

static void
create_overlay_event_breakpoint (void)
{
  struct objfile *objfile;
  const char *const func_name = "_ovly_debug_event";

  ALL_OBJFILES (objfile)
    {
      struct breakpoint *b;
      struct breakpoint_objfile_data *bp_objfile_data;
      CORE_ADDR addr;
      struct explicit_location explicit_loc;

      bp_objfile_data = get_breakpoint_objfile_data (objfile);

      if (msym_not_found_p (bp_objfile_data->overlay_msym.minsym))
	continue;

      if (bp_objfile_data->overlay_msym.minsym == NULL)
	{
	  struct bound_minimal_symbol m;

	  m = lookup_minimal_symbol_text (func_name, objfile);
	  if (m.minsym == NULL)
	    {
	      /* Avoid future lookups in this objfile.  */
	      bp_objfile_data->overlay_msym.minsym = &msym_not_found;
	      continue;
	    }
	  bp_objfile_data->overlay_msym = m;
	}

      addr = BMSYMBOL_VALUE_ADDRESS (bp_objfile_data->overlay_msym);
      b = create_internal_breakpoint (get_objfile_arch (objfile), addr,
                                      bp_overlay_event,
				      &internal_breakpoint_ops);
      initialize_explicit_location (&explicit_loc);
      explicit_loc.function_name = ASTRDUP (func_name);
      b->location = new_explicit_location (&explicit_loc);

      if (overlay_debugging == ovly_auto)
        {
          b->enable_state = bp_enabled;
          overlay_events_enabled = 1;
        }
      else
       {
         b->enable_state = bp_disabled;
         overlay_events_enabled = 0;
       }
    }
}

static void
create_longjmp_master_breakpoint (void)
{
  struct program_space *pspace;

  scoped_restore_current_program_space restore_pspace;

  ALL_PSPACES (pspace)
  {
    struct objfile *objfile;

    set_current_program_space (pspace);

    ALL_OBJFILES (objfile)
    {
      int i;
      struct gdbarch *gdbarch;
      struct breakpoint_objfile_data *bp_objfile_data;

      gdbarch = get_objfile_arch (objfile);

      bp_objfile_data = get_breakpoint_objfile_data (objfile);

      if (!bp_objfile_data->longjmp_searched)
	{
	  std::vector<probe *> ret
	    = find_probes_in_objfile (objfile, "libc", "longjmp");

	  if (!ret.empty ())
	    {
	      /* We are only interested in checking one element.  */
	      probe *p = ret[0];

	      if (!p->can_evaluate_arguments ())
		{
		  /* We cannot use the probe interface here, because it does
		     not know how to evaluate arguments.  */
		  ret.clear ();
		}
	    }
	  bp_objfile_data->longjmp_probes = ret;
	  bp_objfile_data->longjmp_searched = 1;
	}

      if (!bp_objfile_data->longjmp_probes.empty ())
	{
	  struct gdbarch *gdbarch = get_objfile_arch (objfile);

	  for (probe *p : bp_objfile_data->longjmp_probes)
	    {
	      struct breakpoint *b;

	      b = create_internal_breakpoint (gdbarch,
					      p->get_relocated_address (objfile),
					      bp_longjmp_master,
					      &internal_breakpoint_ops);
	      b->location = new_probe_location ("-probe-stap libc:longjmp");
	      b->enable_state = bp_disabled;
	    }

	  continue;
	}

      if (!gdbarch_get_longjmp_target_p (gdbarch))
	continue;

      for (i = 0; i < NUM_LONGJMP_NAMES; i++)
	{
	  struct breakpoint *b;
	  const char *func_name;
	  CORE_ADDR addr;
	  struct explicit_location explicit_loc;

	  if (msym_not_found_p (bp_objfile_data->longjmp_msym[i].minsym))
	    continue;

	  func_name = longjmp_names[i];
	  if (bp_objfile_data->longjmp_msym[i].minsym == NULL)
	    {
	      struct bound_minimal_symbol m;

	      m = lookup_minimal_symbol_text (func_name, objfile);
	      if (m.minsym == NULL)
		{
		  /* Prevent future lookups in this objfile.  */
		  bp_objfile_data->longjmp_msym[i].minsym = &msym_not_found;
		  continue;
		}
	      bp_objfile_data->longjmp_msym[i] = m;
	    }

	  addr = BMSYMBOL_VALUE_ADDRESS (bp_objfile_data->longjmp_msym[i]);
	  b = create_internal_breakpoint (gdbarch, addr, bp_longjmp_master,
					  &internal_breakpoint_ops);
	  initialize_explicit_location (&explicit_loc);
	  explicit_loc.function_name = ASTRDUP (func_name);
	  b->location = new_explicit_location (&explicit_loc);
	  b->enable_state = bp_disabled;
	}
    }
  }
}

/* Create a master std::terminate breakpoint.  */
static void
create_std_terminate_master_breakpoint (void)
{
  struct program_space *pspace;
  const char *const func_name = "std::terminate()";

  scoped_restore_current_program_space restore_pspace;

  ALL_PSPACES (pspace)
  {
    struct objfile *objfile;
    CORE_ADDR addr;

    set_current_program_space (pspace);

    ALL_OBJFILES (objfile)
    {
      struct breakpoint *b;
      struct breakpoint_objfile_data *bp_objfile_data;
      struct explicit_location explicit_loc;

      bp_objfile_data = get_breakpoint_objfile_data (objfile);

      if (msym_not_found_p (bp_objfile_data->terminate_msym.minsym))
	continue;

      if (bp_objfile_data->terminate_msym.minsym == NULL)
	{
	  struct bound_minimal_symbol m;

	  m = lookup_minimal_symbol (func_name, NULL, objfile);
	  if (m.minsym == NULL || (MSYMBOL_TYPE (m.minsym) != mst_text
				   && MSYMBOL_TYPE (m.minsym) != mst_file_text))
	    {
	      /* Prevent future lookups in this objfile.  */
	      bp_objfile_data->terminate_msym.minsym = &msym_not_found;
	      continue;
	    }
	  bp_objfile_data->terminate_msym = m;
	}

      addr = BMSYMBOL_VALUE_ADDRESS (bp_objfile_data->terminate_msym);
      b = create_internal_breakpoint (get_objfile_arch (objfile), addr,
                                      bp_std_terminate_master,
				      &internal_breakpoint_ops);
      initialize_explicit_location (&explicit_loc);
      explicit_loc.function_name = ASTRDUP (func_name);
      b->location = new_explicit_location (&explicit_loc);
      b->enable_state = bp_disabled;
    }
  }
}

/* Install a master breakpoint on the unwinder's debug hook.  */

static void
create_exception_master_breakpoint (void)
{
  struct objfile *objfile;
  const char *const func_name = "_Unwind_DebugHook";

  ALL_OBJFILES (objfile)
    {
      struct breakpoint *b;
      struct gdbarch *gdbarch;
      struct breakpoint_objfile_data *bp_objfile_data;
      CORE_ADDR addr;
      struct explicit_location explicit_loc;

      bp_objfile_data = get_breakpoint_objfile_data (objfile);

      /* We prefer the SystemTap probe point if it exists.  */
      if (!bp_objfile_data->exception_searched)
	{
	  std::vector<probe *> ret
	    = find_probes_in_objfile (objfile, "libgcc", "unwind");

	  if (!ret.empty ())
	    {
	      /* We are only interested in checking one element.  */
	      probe *p = ret[0];

	      if (!p->can_evaluate_arguments ())
		{
		  /* We cannot use the probe interface here, because it does
		     not know how to evaluate arguments.  */
		  ret.clear ();
		}
	    }
	  bp_objfile_data->exception_probes = ret;
	  bp_objfile_data->exception_searched = 1;
	}

      if (!bp_objfile_data->exception_probes.empty ())
	{
	  struct gdbarch *gdbarch = get_objfile_arch (objfile);

	  for (probe *p : bp_objfile_data->exception_probes)
	    {
	      struct breakpoint *b;

	      b = create_internal_breakpoint (gdbarch,
					      p->get_relocated_address (objfile),
					      bp_exception_master,
					      &internal_breakpoint_ops);
	      b->location = new_probe_location ("-probe-stap libgcc:unwind");
	      b->enable_state = bp_disabled;
	    }

	  continue;
	}

      /* Otherwise, try the hook function.  */

      if (msym_not_found_p (bp_objfile_data->exception_msym.minsym))
	continue;

      gdbarch = get_objfile_arch (objfile);

      if (bp_objfile_data->exception_msym.minsym == NULL)
	{
	  struct bound_minimal_symbol debug_hook;

	  debug_hook = lookup_minimal_symbol (func_name, NULL, objfile);
	  if (debug_hook.minsym == NULL)
	    {
	      bp_objfile_data->exception_msym.minsym = &msym_not_found;
	      continue;
	    }

	  bp_objfile_data->exception_msym = debug_hook;
	}

      addr = BMSYMBOL_VALUE_ADDRESS (bp_objfile_data->exception_msym);
      addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr,
						 &current_target);
      b = create_internal_breakpoint (gdbarch, addr, bp_exception_master,
				      &internal_breakpoint_ops);
      initialize_explicit_location (&explicit_loc);
      explicit_loc.function_name = ASTRDUP (func_name);
      b->location = new_explicit_location (&explicit_loc);
      b->enable_state = bp_disabled;
    }
}

/* Does B have a location spec?  */

static int
breakpoint_event_location_empty_p (const struct breakpoint *b)
{
  return b->location != NULL && event_location_empty_p (b->location.get ());
}

void
update_breakpoints_after_exec (void)
{
  struct breakpoint *b, *b_tmp;
  struct bp_location *bploc, **bplocp_tmp;

  /* We're about to delete breakpoints from GDB's lists.  If the
     INSERTED flag is true, GDB will try to lift the breakpoints by
     writing the breakpoints' "shadow contents" back into memory.  The
     "shadow contents" are NOT valid after an exec, so GDB should not
     do that.  Instead, the target is responsible from marking
     breakpoints out as soon as it detects an exec.  We don't do that
     here instead, because there may be other attempts to delete
     breakpoints after detecting an exec and before reaching here.  */
  ALL_BP_LOCATIONS (bploc, bplocp_tmp)
    if (bploc->pspace == current_program_space)
      gdb_assert (!bploc->inserted);

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
  {
    if (b->pspace != current_program_space)
      continue;

    /* Solib breakpoints must be explicitly reset after an exec().  */
    if (b->type == bp_shlib_event)
      {
	delete_breakpoint (b);
	continue;
      }

    /* JIT breakpoints must be explicitly reset after an exec().  */
    if (b->type == bp_jit_event)
      {
	delete_breakpoint (b);
	continue;
      }

    /* Thread event breakpoints must be set anew after an exec(),
       as must overlay event and longjmp master breakpoints.  */
    if (b->type == bp_thread_event || b->type == bp_overlay_event
	|| b->type == bp_longjmp_master || b->type == bp_std_terminate_master
	|| b->type == bp_exception_master)
      {
	delete_breakpoint (b);
	continue;
      }

    /* Step-resume breakpoints are meaningless after an exec().  */
    if (b->type == bp_step_resume || b->type == bp_hp_step_resume)
      {
	delete_breakpoint (b);
	continue;
      }

    /* Just like single-step breakpoints.  */
    if (b->type == bp_single_step)
      {
	delete_breakpoint (b);
	continue;
      }

    /* Longjmp and longjmp-resume breakpoints are also meaningless
       after an exec.  */
    if (b->type == bp_longjmp || b->type == bp_longjmp_resume
	|| b->type == bp_longjmp_call_dummy
	|| b->type == bp_exception || b->type == bp_exception_resume)
      {
	delete_breakpoint (b);
	continue;
      }

    if (b->type == bp_catchpoint)
      {
        /* For now, none of the bp_catchpoint breakpoints need to
           do anything at this point.  In the future, if some of
           the catchpoints need to something, we will need to add
           a new method, and call this method from here.  */
        continue;
      }

    /* bp_finish is a special case.  The only way we ought to be able
       to see one of these when an exec() has happened, is if the user
       caught a vfork, and then said "finish".  Ordinarily a finish just
       carries them to the call-site of the current callee, by setting
       a temporary bp there and resuming.  But in this case, the finish
       will carry them entirely through the vfork & exec.

       We don't want to allow a bp_finish to remain inserted now.  But
       we can't safely delete it, 'cause finish_command has a handle to
       the bp on a bpstat, and will later want to delete it.  There's a
       chance (and I've seen it happen) that if we delete the bp_finish
       here, that its storage will get reused by the time finish_command
       gets 'round to deleting the "use to be a bp_finish" breakpoint.
       We really must allow finish_command to delete a bp_finish.

       In the absence of a general solution for the "how do we know
       it's safe to delete something others may have handles to?"
       problem, what we'll do here is just uninsert the bp_finish, and
       let finish_command delete it.

       (We know the bp_finish is "doomed" in the sense that it's
       momentary, and will be deleted as soon as finish_command sees
       the inferior stopped.  So it doesn't matter that the bp's
       address is probably bogus in the new a.out, unlike e.g., the
       solib breakpoints.)  */

    if (b->type == bp_finish)
      {
	continue;
      }

    /* Without a symbolic address, we have little hope of the
       pre-exec() address meaning the same thing in the post-exec()
       a.out.  */
    if (breakpoint_event_location_empty_p (b))
      {
	delete_breakpoint (b);
	continue;
      }
  }
}

int
detach_breakpoints (ptid_t ptid)
{
  struct bp_location *bl, **blp_tmp;
  int val = 0;
  scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
  struct inferior *inf = current_inferior ();

  if (ptid_get_pid (ptid) == ptid_get_pid (inferior_ptid))
    error (_("Cannot detach breakpoints of inferior_ptid"));

  /* Set inferior_ptid; remove_breakpoint_1 uses this global.  */
  inferior_ptid = ptid;
  ALL_BP_LOCATIONS (bl, blp_tmp)
  {
    if (bl->pspace != inf->pspace)
      continue;

    /* This function must physically remove breakpoints locations
       from the specified ptid, without modifying the breakpoint
       package's state.  Locations of type bp_loc_other are only
       maintained at GDB side.  So, there is no need to remove
       these bp_loc_other locations.  Moreover, removing these
       would modify the breakpoint package's state.  */
    if (bl->loc_type == bp_loc_other)
      continue;

    if (bl->inserted)
      val |= remove_breakpoint_1 (bl, DETACH_BREAKPOINT);
  }

  return val;
}

/* Remove the breakpoint location BL from the current address space.
   Note that this is used to detach breakpoints from a child fork.
   When we get here, the child isn't in the inferior list, and neither
   do we have objects to represent its address space --- we should
   *not* look at bl->pspace->aspace here.  */

static int
remove_breakpoint_1 (struct bp_location *bl, enum remove_bp_reason reason)
{
  int val;

  /* BL is never in moribund_locations by our callers.  */
  gdb_assert (bl->owner != NULL);

  /* The type of none suggests that owner is actually deleted.
     This should not ever happen.  */
  gdb_assert (bl->owner->type != bp_none);

  if (bl->loc_type == bp_loc_software_breakpoint
      || bl->loc_type == bp_loc_hardware_breakpoint)
    {
      /* "Normal" instruction breakpoint: either the standard
	 trap-instruction bp (bp_breakpoint), or a
	 bp_hardware_breakpoint.  */

      /* First check to see if we have to handle an overlay.  */
      if (overlay_debugging == ovly_off
	  || bl->section == NULL
	  || !(section_is_overlay (bl->section)))
	{
	  /* No overlay handling: just remove the breakpoint.  */

	  /* If we're trying to uninsert a memory breakpoint that we
	     know is set in a dynamic object that is marked
	     shlib_disabled, then either the dynamic object was
	     removed with "remove-symbol-file" or with
	     "nosharedlibrary".  In the former case, we don't know
	     whether another dynamic object might have loaded over the
	     breakpoint's address -- the user might well let us know
	     about it next with add-symbol-file (the whole point of
	     add-symbol-file is letting the user manually maintain a
	     list of dynamically loaded objects).  If we have the
	     breakpoint's shadow memory, that is, this is a software
	     breakpoint managed by GDB, check whether the breakpoint
	     is still inserted in memory, to avoid overwriting wrong
	     code with stale saved shadow contents.  Note that HW
	     breakpoints don't have shadow memory, as they're
	     implemented using a mechanism that is not dependent on
	     being able to modify the target's memory, and as such
	     they should always be removed.  */
	  if (bl->shlib_disabled
	      && bl->target_info.shadow_len != 0
	      && !memory_validate_breakpoint (bl->gdbarch, &bl->target_info))
	    val = 0;
	  else
	    val = bl->owner->ops->remove_location (bl, reason);
	}
      else
	{
	  /* This breakpoint is in an overlay section.
	     Did we set a breakpoint at the LMA?  */
	  if (!overlay_events_enabled)
	      {
		/* Yes -- overlay event support is not active, so we
		   should have set a breakpoint at the LMA.  Remove it.  
		*/
		/* Ignore any failures: if the LMA is in ROM, we will
		   have already warned when we failed to insert it.  */
		if (bl->loc_type == bp_loc_hardware_breakpoint)
		  target_remove_hw_breakpoint (bl->gdbarch,
					       &bl->overlay_target_info);
		else
		  target_remove_breakpoint (bl->gdbarch,
					    &bl->overlay_target_info,
					    reason);
	      }
	  /* Did we set a breakpoint at the VMA? 
	     If so, we will have marked the breakpoint 'inserted'.  */
	  if (bl->inserted)
	    {
	      /* Yes -- remove it.  Previously we did not bother to
		 remove the breakpoint if the section had been
		 unmapped, but let's not rely on that being safe.  We
		 don't know what the overlay manager might do.  */

	      /* However, we should remove *software* breakpoints only
		 if the section is still mapped, or else we overwrite
		 wrong code with the saved shadow contents.  */
	      if (bl->loc_type == bp_loc_hardware_breakpoint
		  || section_is_mapped (bl->section))
		val = bl->owner->ops->remove_location (bl, reason);
	      else
		val = 0;
	    }
	  else
	    {
	      /* No -- not inserted, so no need to remove.  No error.  */
	      val = 0;
	    }
	}

      /* In some cases, we might not be able to remove a breakpoint in
	 a shared library that has already been removed, but we have
	 not yet processed the shlib unload event.  Similarly for an
	 unloaded add-symbol-file object - the user might not yet have
	 had the chance to remove-symbol-file it.  shlib_disabled will
	 be set if the library/object has already been removed, but
	 the breakpoint hasn't been uninserted yet, e.g., after
	 "nosharedlibrary" or "remove-symbol-file" with breakpoints
	 always-inserted mode.  */
      if (val
	  && (bl->loc_type == bp_loc_software_breakpoint
	      && (bl->shlib_disabled
		  || solib_name_from_address (bl->pspace, bl->address)
		  || shared_objfile_contains_address_p (bl->pspace,
							bl->address))))
	val = 0;

      if (val)
	return val;
      bl->inserted = (reason == DETACH_BREAKPOINT);
    }
  else if (bl->loc_type == bp_loc_hardware_watchpoint)
    {
      gdb_assert (bl->owner->ops != NULL
		  && bl->owner->ops->remove_location != NULL);

      bl->inserted = (reason == DETACH_BREAKPOINT);
      bl->owner->ops->remove_location (bl, reason);

      /* Failure to remove any of the hardware watchpoints comes here.  */
      if (reason == REMOVE_BREAKPOINT && bl->inserted)
	warning (_("Could not remove hardware watchpoint %d."),
		 bl->owner->number);
    }
  else if (bl->owner->type == bp_catchpoint
           && breakpoint_enabled (bl->owner)
           && !bl->duplicate)
    {
      gdb_assert (bl->owner->ops != NULL
		  && bl->owner->ops->remove_location != NULL);

      val = bl->owner->ops->remove_location (bl, reason);
      if (val)
	return val;

      bl->inserted = (reason == DETACH_BREAKPOINT);
    }

  return 0;
}

static int
remove_breakpoint (struct bp_location *bl)
{
  /* BL is never in moribund_locations by our callers.  */
  gdb_assert (bl->owner != NULL);

  /* The type of none suggests that owner is actually deleted.
     This should not ever happen.  */
  gdb_assert (bl->owner->type != bp_none);

  scoped_restore_current_pspace_and_thread restore_pspace_thread;

  switch_to_program_space_and_thread (bl->pspace);

  return remove_breakpoint_1 (bl, REMOVE_BREAKPOINT);
}

/* Clear the "inserted" flag in all breakpoints.  */

void
mark_breakpoints_out (void)
{
  struct bp_location *bl, **blp_tmp;

  ALL_BP_LOCATIONS (bl, blp_tmp)
    if (bl->pspace == current_program_space)
      bl->inserted = 0;
}

/* Clear the "inserted" flag in all breakpoints and delete any
   breakpoints which should go away between runs of the program.

   Plus other such housekeeping that has to be done for breakpoints
   between runs.

   Note: this function gets called at the end of a run (by
   generic_mourn_inferior) and when a run begins (by
   init_wait_for_inferior).  */



void
breakpoint_init_inferior (enum inf_context context)
{
  struct breakpoint *b, *b_tmp;
  struct bp_location *bl;
  int ix;
  struct program_space *pspace = current_program_space;

  /* If breakpoint locations are shared across processes, then there's
     nothing to do.  */
  if (gdbarch_has_global_breakpoints (target_gdbarch ()))
    return;

  mark_breakpoints_out ();

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
  {
    if (b->loc && b->loc->pspace != pspace)
      continue;

    switch (b->type)
      {
      case bp_call_dummy:
      case bp_longjmp_call_dummy:

	/* If the call dummy breakpoint is at the entry point it will
	   cause problems when the inferior is rerun, so we better get
	   rid of it.  */

      case bp_watchpoint_scope:

	/* Also get rid of scope breakpoints.  */

      case bp_shlib_event:

	/* Also remove solib event breakpoints.  Their addresses may
	   have changed since the last time we ran the program.
	   Actually we may now be debugging against different target;
	   and so the solib backend that installed this breakpoint may
	   not be used in by the target.  E.g.,

	   (gdb) file prog-linux
	   (gdb) run               # native linux target
	   ...
	   (gdb) kill
	   (gdb) file prog-win.exe
	   (gdb) tar rem :9999     # remote Windows gdbserver.
	*/

      case bp_step_resume:

	/* Also remove step-resume breakpoints.  */

      case bp_single_step:

	/* Also remove single-step breakpoints.  */

	delete_breakpoint (b);
	break;

      case bp_watchpoint:
      case bp_hardware_watchpoint:
      case bp_read_watchpoint:
      case bp_access_watchpoint:
	{
	  struct watchpoint *w = (struct watchpoint *) b;

	  /* Likewise for watchpoints on local expressions.  */
	  if (w->exp_valid_block != NULL)
	    delete_breakpoint (b);
	  else
	    {
	      /* Get rid of existing locations, which are no longer
		 valid.  New ones will be created in
		 update_watchpoint, when the inferior is restarted.
		 The next update_global_location_list call will
		 garbage collect them.  */
	      b->loc = NULL;

	      if (context == inf_starting)
		{
		  /* Reset val field to force reread of starting value in
		     insert_breakpoints.  */
		  w->val.reset (nullptr);
		  w->val_valid = 0;
		}
	    }
	}
	break;
      default:
	break;
      }
  }

  /* Get rid of the moribund locations.  */
  for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, bl); ++ix)
    decref_bp_location (&bl);
  VEC_free (bp_location_p, moribund_locations);
}

/* These functions concern about actual breakpoints inserted in the
   target --- to e.g. check if we need to do decr_pc adjustment or if
   we need to hop over the bkpt --- so we check for address space
   match, not program space.  */

/* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
   exists at PC.  It returns ordinary_breakpoint_here if it's an
   ordinary breakpoint, or permanent_breakpoint_here if it's a
   permanent breakpoint.
   - When continuing from a location with an ordinary breakpoint, we
     actually single step once before calling insert_breakpoints.
   - When continuing from a location with a permanent breakpoint, we
     need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
     the target, to advance the PC past the breakpoint.  */

enum breakpoint_here
breakpoint_here_p (const address_space *aspace, CORE_ADDR pc)
{
  struct bp_location *bl, **blp_tmp;
  int any_breakpoint_here = 0;

  ALL_BP_LOCATIONS (bl, blp_tmp)
    {
      if (bl->loc_type != bp_loc_software_breakpoint
	  && bl->loc_type != bp_loc_hardware_breakpoint)
	continue;

      /* ALL_BP_LOCATIONS bp_location has BL->OWNER always non-NULL.  */
      if ((breakpoint_enabled (bl->owner)
	   || bl->permanent)
	  && breakpoint_location_address_match (bl, aspace, pc))
	{
	  if (overlay_debugging 
	      && section_is_overlay (bl->section)
	      && !section_is_mapped (bl->section))
	    continue;		/* unmapped overlay -- can't be a match */
	  else if (bl->permanent)
	    return permanent_breakpoint_here;
	  else
	    any_breakpoint_here = 1;
	}
    }

  return any_breakpoint_here ? ordinary_breakpoint_here : no_breakpoint_here;
}

/* See breakpoint.h.  */

int
breakpoint_in_range_p (const address_space *aspace,
		       CORE_ADDR addr, ULONGEST len)
{
  struct bp_location *bl, **blp_tmp;

  ALL_BP_LOCATIONS (bl, blp_tmp)
    {
      if (bl->loc_type != bp_loc_software_breakpoint
	  && bl->loc_type != bp_loc_hardware_breakpoint)
	continue;

      if ((breakpoint_enabled (bl->owner)
	   || bl->permanent)
	  && breakpoint_location_address_range_overlap (bl, aspace,
							addr, len))
	{
	  if (overlay_debugging
	      && section_is_overlay (bl->section)
	      && !section_is_mapped (bl->section))
	    {
	      /* Unmapped overlay -- can't be a match.  */
	      continue;
	    }

	  return 1;
	}
    }

  return 0;
}

/* Return true if there's a moribund breakpoint at PC.  */

int
moribund_breakpoint_here_p (const address_space *aspace, CORE_ADDR pc)
{
  struct bp_location *loc;
  int ix;

  for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix)
    if (breakpoint_location_address_match (loc, aspace, pc))
      return 1;

  return 0;
}

/* Returns non-zero iff BL is inserted at PC, in address space
   ASPACE.  */

static int
bp_location_inserted_here_p (struct bp_location *bl,
			     const address_space *aspace, CORE_ADDR pc)
{
  if (bl->inserted
      && breakpoint_address_match (bl->pspace->aspace, bl->address,
				   aspace, pc))
    {
      if (overlay_debugging
	  && section_is_overlay (bl->section)
	  && !section_is_mapped (bl->section))
	return 0;		/* unmapped overlay -- can't be a match */
      else
	return 1;
    }
  return 0;
}

/* Returns non-zero iff there's a breakpoint inserted at PC.  */

int
breakpoint_inserted_here_p (const address_space *aspace, CORE_ADDR pc)
{
  struct bp_location **blp, **blp_tmp = NULL;

  ALL_BP_LOCATIONS_AT_ADDR (blp, blp_tmp, pc)
    {
      struct bp_location *bl = *blp;

      if (bl->loc_type != bp_loc_software_breakpoint
	  && bl->loc_type != bp_loc_hardware_breakpoint)
	continue;

      if (bp_location_inserted_here_p (bl, aspace, pc))
	return 1;
    }
  return 0;
}

/* This function returns non-zero iff there is a software breakpoint
   inserted at PC.  */

int
software_breakpoint_inserted_here_p (const address_space *aspace,
				     CORE_ADDR pc)
{
  struct bp_location **blp, **blp_tmp = NULL;

  ALL_BP_LOCATIONS_AT_ADDR (blp, blp_tmp, pc)
    {
      struct bp_location *bl = *blp;

      if (bl->loc_type != bp_loc_software_breakpoint)
	continue;

      if (bp_location_inserted_here_p (bl, aspace, pc))
	return 1;
    }

  return 0;
}

/* See breakpoint.h.  */

int
hardware_breakpoint_inserted_here_p (const address_space *aspace,
				     CORE_ADDR pc)
{
  struct bp_location **blp, **blp_tmp = NULL;

  ALL_BP_LOCATIONS_AT_ADDR (blp, blp_tmp, pc)
    {
      struct bp_location *bl = *blp;

      if (bl->loc_type != bp_loc_hardware_breakpoint)
	continue;

      if (bp_location_inserted_here_p (bl, aspace, pc))
	return 1;
    }

  return 0;
}

int
hardware_watchpoint_inserted_in_range (const address_space *aspace,
				       CORE_ADDR addr, ULONGEST len)
{
  struct breakpoint *bpt;

  ALL_BREAKPOINTS (bpt)
    {
      struct bp_location *loc;

      if (bpt->type != bp_hardware_watchpoint
	  && bpt->type != bp_access_watchpoint)
	continue;

      if (!breakpoint_enabled (bpt))
	continue;

      for (loc = bpt->loc; loc; loc = loc->next)
	if (loc->pspace->aspace == aspace && loc->inserted)
	  {
	    CORE_ADDR l, h;

	    /* Check for intersection.  */
	    l = std::max<CORE_ADDR> (loc->address, addr);
	    h = std::min<CORE_ADDR> (loc->address + loc->length, addr + len);
	    if (l < h)
	      return 1;
	  }
    }
  return 0;
}


/* bpstat stuff.  External routines' interfaces are documented
   in breakpoint.h.  */

int
is_catchpoint (struct breakpoint *ep)
{
  return (ep->type == bp_catchpoint);
}

/* Frees any storage that is part of a bpstat.  Does not walk the
   'next' chain.  */

bpstats::~bpstats ()
{
  if (bp_location_at != NULL)
    decref_bp_location (&bp_location_at);
}

/* Clear a bpstat so that it says we are not at any breakpoint.
   Also free any storage that is part of a bpstat.  */

void
bpstat_clear (bpstat *bsp)
{
  bpstat p;
  bpstat q;

  if (bsp == 0)
    return;
  p = *bsp;
  while (p != NULL)
    {
      q = p->next;
      delete p;
      p = q;
    }
  *bsp = NULL;
}

bpstats::bpstats (const bpstats &other)
  : next (NULL),
    bp_location_at (other.bp_location_at),
    breakpoint_at (other.breakpoint_at),
    commands (other.commands),
    print (other.print),
    stop (other.stop),
    print_it (other.print_it)
{
  if (other.old_val != NULL)
    old_val = release_value (value_copy (other.old_val.get ()));
  incref_bp_location (bp_location_at);
}

/* Return a copy of a bpstat.  Like "bs1 = bs2" but all storage that
   is part of the bpstat is copied as well.  */

bpstat
bpstat_copy (bpstat bs)
{
  bpstat p = NULL;
  bpstat tmp;
  bpstat retval = NULL;

  if (bs == NULL)
    return bs;

  for (; bs != NULL; bs = bs->next)
    {
      tmp = new bpstats (*bs);

      if (p == NULL)
	/* This is the first thing in the chain.  */
	retval = tmp;
      else
	p->next = tmp;
      p = tmp;
    }
  p->next = NULL;
  return retval;
}

/* Find the bpstat associated with this breakpoint.  */

bpstat
bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
{
  if (bsp == NULL)
    return NULL;

  for (; bsp != NULL; bsp = bsp->next)
    {
      if (bsp->breakpoint_at == breakpoint)
	return bsp;
    }
  return NULL;
}

/* See breakpoint.h.  */

int
bpstat_explains_signal (bpstat bsp, enum gdb_signal sig)
{
  for (; bsp != NULL; bsp = bsp->next)
    {
      if (bsp->breakpoint_at == NULL)
	{
	  /* A moribund location can never explain a signal other than
	     GDB_SIGNAL_TRAP.  */
	  if (sig == GDB_SIGNAL_TRAP)
	    return 1;
	}
      else
	{
	  if (bsp->breakpoint_at->ops->explains_signal (bsp->breakpoint_at,
							sig))
	    return 1;
	}
    }

  return 0;
}

/* Put in *NUM the breakpoint number of the first breakpoint we are
   stopped at.  *BSP upon return is a bpstat which points to the
   remaining breakpoints stopped at (but which is not guaranteed to be
   good for anything but further calls to bpstat_num).

   Return 0 if passed a bpstat which does not indicate any breakpoints.
   Return -1 if stopped at a breakpoint that has been deleted since
   we set it.
   Return 1 otherwise.  */

int
bpstat_num (bpstat *bsp, int *num)
{
  struct breakpoint *b;

  if ((*bsp) == NULL)
    return 0;			/* No more breakpoint values */

  /* We assume we'll never have several bpstats that correspond to a
     single breakpoint -- otherwise, this function might return the
     same number more than once and this will look ugly.  */
  b = (*bsp)->breakpoint_at;
  *bsp = (*bsp)->next;
  if (b == NULL)
    return -1;			/* breakpoint that's been deleted since */

  *num = b->number;		/* We have its number */
  return 1;
}

/* See breakpoint.h.  */

void
bpstat_clear_actions (void)
{
  struct thread_info *tp;
  bpstat bs;

  if (ptid_equal (inferior_ptid, null_ptid))
    return;

  tp = find_thread_ptid (inferior_ptid);
  if (tp == NULL)
    return;

  for (bs = tp->control.stop_bpstat; bs != NULL; bs = bs->next)
    {
      bs->commands = NULL;
      bs->old_val.reset (nullptr);
    }
}

/* Called when a command is about to proceed the inferior.  */

static void
breakpoint_about_to_proceed (void)
{
  if (!ptid_equal (inferior_ptid, null_ptid))
    {
      struct thread_info *tp = inferior_thread ();

      /* Allow inferior function calls in breakpoint commands to not
	 interrupt the command list.  When the call finishes
	 successfully, the inferior will be standing at the same
	 breakpoint as if nothing happened.  */
      if (tp->control.in_infcall)
	return;
    }

  breakpoint_proceeded = 1;
}

/* Return non-zero iff CMD as the first line of a command sequence is `silent'
   or its equivalent.  */

static int
command_line_is_silent (struct command_line *cmd)
{
  return cmd && (strcmp ("silent", cmd->line) == 0);
}

/* Execute all the commands associated with all the breakpoints at
   this location.  Any of these commands could cause the process to
   proceed beyond this point, etc.  We look out for such changes by
   checking the global "breakpoint_proceeded" after each command.

   Returns true if a breakpoint command resumed the inferior.  In that
   case, it is the caller's responsibility to recall it again with the
   bpstat of the current thread.  */

static int
bpstat_do_actions_1 (bpstat *bsp)
{
  bpstat bs;
  int again = 0;

  /* Avoid endless recursion if a `source' command is contained
     in bs->commands.  */
  if (executing_breakpoint_commands)
    return 0;

  scoped_restore save_executing
    = make_scoped_restore (&executing_breakpoint_commands, 1);

  scoped_restore preventer = prevent_dont_repeat ();

  /* This pointer will iterate over the list of bpstat's.  */
  bs = *bsp;

  breakpoint_proceeded = 0;
  for (; bs != NULL; bs = bs->next)
    {
      struct command_line *cmd = NULL;

      /* Take ownership of the BSP's command tree, if it has one.

         The command tree could legitimately contain commands like
         'step' and 'next', which call clear_proceed_status, which
         frees stop_bpstat's command tree.  To make sure this doesn't
         free the tree we're executing out from under us, we need to
         take ownership of the tree ourselves.  Since a given bpstat's
         commands are only executed once, we don't need to copy it; we
         can clear the pointer in the bpstat, and make sure we free
         the tree when we're done.  */
      counted_command_line ccmd = bs->commands;
      bs->commands = NULL;
      if (ccmd != NULL)
	cmd = ccmd.get ();
      if (command_line_is_silent (cmd))
	{
	  /* The action has been already done by bpstat_stop_status.  */
	  cmd = cmd->next;
	}

      while (cmd != NULL)
	{
	  execute_control_command (cmd);

	  if (breakpoint_proceeded)
	    break;
	  else
	    cmd = cmd->next;
	}

      if (breakpoint_proceeded)
	{
	  if (current_ui->async)
	    /* If we are in async mode, then the target might be still
	       running, not stopped at any breakpoint, so nothing for
	       us to do here -- just return to the event loop.  */
	    ;
	  else
	    /* In sync mode, when execute_control_command returns
	       we're already standing on the next breakpoint.
	       Breakpoint commands for that stop were not run, since
	       execute_command does not run breakpoint commands --
	       only command_line_handler does, but that one is not
	       involved in execution of breakpoint commands.  So, we
	       can now execute breakpoint commands.  It should be
	       noted that making execute_command do bpstat actions is
	       not an option -- in this case we'll have recursive
	       invocation of bpstat for each breakpoint with a
	       command, and can easily blow up GDB stack.  Instead, we
	       return true, which will trigger the caller to recall us
	       with the new stop_bpstat.  */
	    again = 1;
	  break;
	}
    }
  return again;
}

void
bpstat_do_actions (void)
{
  struct cleanup *cleanup_if_error = make_bpstat_clear_actions_cleanup ();

  /* Do any commands attached to breakpoint we are stopped at.  */
  while (!ptid_equal (inferior_ptid, null_ptid)
	 && target_has_execution
	 && !is_exited (inferior_ptid)
	 && !is_executing (inferior_ptid))
    /* Since in sync mode, bpstat_do_actions may resume the inferior,
       and only return when it is stopped at the next breakpoint, we
       keep doing breakpoint actions until it returns false to
       indicate the inferior was not resumed.  */
    if (!bpstat_do_actions_1 (&inferior_thread ()->control.stop_bpstat))
      break;

  discard_cleanups (cleanup_if_error);
}

/* Print out the (old or new) value associated with a watchpoint.  */

static void
watchpoint_value_print (struct value *val, struct ui_file *stream)
{
  if (val == NULL)
    fprintf_unfiltered (stream, _("<unreadable>"));
  else
    {
      struct value_print_options opts;
      get_user_print_options (&opts);
      value_print (val, stream, &opts);
    }
}

/* Print the "Thread ID hit" part of "Thread ID hit Breakpoint N" if
   debugging multiple threads.  */

void
maybe_print_thread_hit_breakpoint (struct ui_out *uiout)
{
  if (uiout->is_mi_like_p ())
    return;

  uiout->text ("\n");

  if (show_thread_that_caused_stop ())
    {
      const char *name;
      struct thread_info *thr = inferior_thread ();

      uiout->text ("Thread ");
      uiout->field_fmt ("thread-id", "%s", print_thread_id (thr));

      name = thr->name != NULL ? thr->name : target_thread_name (thr);
      if (name != NULL)
	{
	  uiout->text (" \"");
	  uiout->field_fmt ("name", "%s", name);
	  uiout->text ("\"");
	}

      uiout->text (" hit ");
    }
}

/* Generic routine for printing messages indicating why we
   stopped.  The behavior of this function depends on the value
   'print_it' in the bpstat structure.  Under some circumstances we
   may decide not to print anything here and delegate the task to
   normal_stop().  */

static enum print_stop_action
print_bp_stop_message (bpstat bs)
{
  switch (bs->print_it)
    {
    case print_it_noop:
      /* Nothing should be printed for this bpstat entry.  */
      return PRINT_UNKNOWN;
      break;

    case print_it_done:
      /* We still want to print the frame, but we already printed the
         relevant messages.  */
      return PRINT_SRC_AND_LOC;
      break;

    case print_it_normal:
      {
	struct breakpoint *b = bs->breakpoint_at;

	/* bs->breakpoint_at can be NULL if it was a momentary breakpoint
	   which has since been deleted.  */
	if (b == NULL)
	  return PRINT_UNKNOWN;

	/* Normal case.  Call the breakpoint's print_it method.  */
	return b->ops->print_it (bs);
      }
      break;

    default:
      internal_error (__FILE__, __LINE__,
		      _("print_bp_stop_message: unrecognized enum value"));
      break;
    }
}

/* A helper function that prints a shared library stopped event.  */

static void
print_solib_event (int is_catchpoint)
{
  bool any_deleted = !current_program_space->deleted_solibs.empty ();
  int any_added
    = !VEC_empty (so_list_ptr, current_program_space->added_solibs);

  if (!is_catchpoint)
    {
      if (any_added || any_deleted)
	current_uiout->text (_("Stopped due to shared library event:\n"));
      else
	current_uiout->text (_("Stopped due to shared library event (no "
			       "libraries added or removed)\n"));
    }

  if (current_uiout->is_mi_like_p ())
    current_uiout->field_string ("reason",
				 async_reason_lookup (EXEC_ASYNC_SOLIB_EVENT));

  if (any_deleted)
    {
      current_uiout->text (_("  Inferior unloaded "));
      ui_out_emit_list list_emitter (current_uiout, "removed");
      for (int ix = 0; ix < current_program_space->deleted_solibs.size (); ix++)
	{
	  const std::string &name = current_program_space->deleted_solibs[ix];

	  if (ix > 0)
	    current_uiout->text ("    ");
	  current_uiout->field_string ("library", name);
	  current_uiout->text ("\n");
	}
    }

  if (any_added)
    {
      struct so_list *iter;
      int ix;

      current_uiout->text (_("  Inferior loaded "));
      ui_out_emit_list list_emitter (current_uiout, "added");
      for (ix = 0;
	   VEC_iterate (so_list_ptr, current_program_space->added_solibs,
			ix, iter);
	   ++ix)
	{
	  if (ix > 0)
	    current_uiout->text ("    ");
	  current_uiout->field_string ("library", iter->so_name);
	  current_uiout->text ("\n");
	}
    }
}

/* Print a message indicating what happened.  This is called from
   normal_stop().  The input to this routine is the head of the bpstat
   list - a list of the eventpoints that caused this stop.  KIND is
   the target_waitkind for the stopping event.  This
   routine calls the generic print routine for printing a message
   about reasons for stopping.  This will print (for example) the
   "Breakpoint n," part of the output.  The return value of this
   routine is one of:

   PRINT_UNKNOWN: Means we printed nothing.
   PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
   code to print the location.  An example is 
   "Breakpoint 1, " which should be followed by
   the location.
   PRINT_SRC_ONLY: Means we printed something, but there is no need
   to also print the location part of the message.
   An example is the catch/throw messages, which
   don't require a location appended to the end.
   PRINT_NOTHING: We have done some printing and we don't need any 
   further info to be printed.  */

enum print_stop_action
bpstat_print (bpstat bs, int kind)
{
  enum print_stop_action val;

  /* Maybe another breakpoint in the chain caused us to stop.
     (Currently all watchpoints go on the bpstat whether hit or not.
     That probably could (should) be changed, provided care is taken
     with respect to bpstat_explains_signal).  */
  for (; bs; bs = bs->next)
    {
      val = print_bp_stop_message (bs);
      if (val == PRINT_SRC_ONLY 
	  || val == PRINT_SRC_AND_LOC 
	  || val == PRINT_NOTHING)
	return val;
    }

  /* If we had hit a shared library event breakpoint,
     print_bp_stop_message would print out this message.  If we hit an
     OS-level shared library event, do the same thing.  */
  if (kind == TARGET_WAITKIND_LOADED)
    {
      print_solib_event (0);
      return PRINT_NOTHING;
    }

  /* We reached the end of the chain, or we got a null BS to start
     with and nothing was printed.  */
  return PRINT_UNKNOWN;
}

/* Evaluate the boolean expression EXP and return the result.  */

static bool
breakpoint_cond_eval (expression *exp)
{
  struct value *mark = value_mark ();
  bool res = value_true (evaluate_expression (exp));

  value_free_to_mark (mark);
  return res;
}

/* Allocate a new bpstat.  Link it to the FIFO list by BS_LINK_POINTER.  */

bpstats::bpstats (struct bp_location *bl, bpstat **bs_link_pointer)
  : next (NULL),
    bp_location_at (bl),
    breakpoint_at (bl->owner),
    commands (NULL),
    print (0),
    stop (0),
    print_it (print_it_normal)
{
  incref_bp_location (bl);
  **bs_link_pointer = this;
  *bs_link_pointer = &next;
}

bpstats::bpstats ()
  : next (NULL),
    bp_location_at (NULL),
    breakpoint_at (NULL),
    commands (NULL),
    print (0),
    stop (0),
    print_it (print_it_normal)
{
}

/* The target has stopped with waitstatus WS.  Check if any hardware
   watchpoints have triggered, according to the target.  */

int
watchpoints_triggered (struct target_waitstatus *ws)
{
  int stopped_by_watchpoint = target_stopped_by_watchpoint ();
  CORE_ADDR addr;
  struct breakpoint *b;

  if (!stopped_by_watchpoint)
    {
      /* We were not stopped by a watchpoint.  Mark all watchpoints
	 as not triggered.  */
      ALL_BREAKPOINTS (b)
	if (is_hardware_watchpoint (b))
	  {
	    struct watchpoint *w = (struct watchpoint *) b;

	    w->watchpoint_triggered = watch_triggered_no;
	  }

      return 0;
    }

  if (!target_stopped_data_address (&current_target, &addr))
    {
      /* We were stopped by a watchpoint, but we don't know where.
	 Mark all watchpoints as unknown.  */
      ALL_BREAKPOINTS (b)
	if (is_hardware_watchpoint (b))
	  {
	    struct watchpoint *w = (struct watchpoint *) b;

	    w->watchpoint_triggered = watch_triggered_unknown;
	  }

      return 1;
    }

  /* The target could report the data address.  Mark watchpoints
     affected by this data address as triggered, and all others as not
     triggered.  */

  ALL_BREAKPOINTS (b)
    if (is_hardware_watchpoint (b))
      {
	struct watchpoint *w = (struct watchpoint *) b;
	struct bp_location *loc;

	w->watchpoint_triggered = watch_triggered_no;
	for (loc = b->loc; loc; loc = loc->next)
	  {
	    if (is_masked_watchpoint (b))
	      {
		CORE_ADDR newaddr = addr & w->hw_wp_mask;
		CORE_ADDR start = loc->address & w->hw_wp_mask;

		if (newaddr == start)
		  {
		    w->watchpoint_triggered = watch_triggered_yes;
		    break;
		  }
	      }
	    /* Exact match not required.  Within range is sufficient.  */
	    else if (target_watchpoint_addr_within_range (&current_target,
							 addr, loc->address,
							 loc->length))
	      {
		w->watchpoint_triggered = watch_triggered_yes;
		break;
	      }
	  }
      }

  return 1;
}

/* Possible return values for watchpoint_check.  */
enum wp_check_result
  {
    /* The watchpoint has been deleted.  */
    WP_DELETED = 1,

    /* The value has changed.  */
    WP_VALUE_CHANGED = 2,

    /* The value has not changed.  */
    WP_VALUE_NOT_CHANGED = 3,

    /* Ignore this watchpoint, no matter if the value changed or not.  */
    WP_IGNORE = 4,
  };

#define BP_TEMPFLAG 1
#define BP_HARDWAREFLAG 2

/* Evaluate watchpoint condition expression and check if its value
   changed.  */

static wp_check_result
watchpoint_check (bpstat bs)
{
  struct watchpoint *b;
  struct frame_info *fr;
  int within_current_scope;

  /* BS is built from an existing struct breakpoint.  */
  gdb_assert (bs->breakpoint_at != NULL);
  b = (struct watchpoint *) bs->breakpoint_at;

  /* If this is a local watchpoint, we only want to check if the
     watchpoint frame is in scope if the current thread is the thread
     that was used to create the watchpoint.  */
  if (!watchpoint_in_thread_scope (b))
    return WP_IGNORE;

  if (b->exp_valid_block == NULL)
    within_current_scope = 1;
  else
    {
      struct frame_info *frame = get_current_frame ();
      struct gdbarch *frame_arch = get_frame_arch (frame);
      CORE_ADDR frame_pc = get_frame_pc (frame);

      /* stack_frame_destroyed_p() returns a non-zero value if we're
	 still in the function but the stack frame has already been
	 invalidated.  Since we can't rely on the values of local
	 variables after the stack has been destroyed, we are treating
	 the watchpoint in that state as `not changed' without further
	 checking.  Don't mark watchpoints as changed if the current
	 frame is in an epilogue - even if they are in some other
	 frame, our view of the stack is likely to be wrong and
	 frame_find_by_id could error out.  */
      if (gdbarch_stack_frame_destroyed_p (frame_arch, frame_pc))
	return WP_IGNORE;

      fr = frame_find_by_id (b->watchpoint_frame);
      within_current_scope = (fr != NULL);

      /* If we've gotten confused in the unwinder, we might have
	 returned a frame that can't describe this variable.  */
      if (within_current_scope)
	{
	  struct symbol *function;

	  function = get_frame_function (fr);
	  if (function == NULL
	      || !contained_in (b->exp_valid_block,
				SYMBOL_BLOCK_VALUE (function)))
	    within_current_scope = 0;
	}

      if (within_current_scope)
	/* If we end up stopping, the current frame will get selected
	   in normal_stop.  So this call to select_frame won't affect
	   the user.  */
	select_frame (fr);
    }

  if (within_current_scope)
    {
      /* We use value_{,free_to_}mark because it could be a *long*
         time before we return to the command level and call
         free_all_values.  We can't call free_all_values because we
         might be in the middle of evaluating a function call.  */

      int pc = 0;
      struct value *mark;
      struct value *new_val;

      if (is_masked_watchpoint (b))
	/* Since we don't know the exact trigger address (from
	   stopped_data_address), just tell the user we've triggered
	   a mask watchpoint.  */
	return WP_VALUE_CHANGED;

      mark = value_mark ();
      fetch_subexp_value (b->exp.get (), &pc, &new_val, NULL, NULL, 0);

      if (b->val_bitsize != 0)
	new_val = extract_bitfield_from_watchpoint_value (b, new_val);

      /* We use value_equal_contents instead of value_equal because
	 the latter coerces an array to a pointer, thus comparing just
	 the address of the array instead of its contents.  This is
	 not what we want.  */
      if ((b->val != NULL) != (new_val != NULL)
	  || (b->val != NULL && !value_equal_contents (b->val.get (),
						       new_val)))
	{
	  bs->old_val = b->val;
	  b->val = release_value (new_val);
	  b->val_valid = 1;
	  if (new_val != NULL)
	    value_free_to_mark (mark);
	  return WP_VALUE_CHANGED;
	}
      else
	{
	  /* Nothing changed.  */
	  value_free_to_mark (mark);
	  return WP_VALUE_NOT_CHANGED;
	}
    }
  else
    {
      /* This seems like the only logical thing to do because
         if we temporarily ignored the watchpoint, then when
         we reenter the block in which it is valid it contains
         garbage (in the case of a function, it may have two
         garbage values, one before and one after the prologue).
         So we can't even detect the first assignment to it and
         watch after that (since the garbage may or may not equal
         the first value assigned).  */
      /* We print all the stop information in
	 breakpoint_ops->print_it, but in this case, by the time we
	 call breakpoint_ops->print_it this bp will be deleted
	 already.  So we have no choice but print the information
	 here.  */

      SWITCH_THRU_ALL_UIS ()
        {
	  struct ui_out *uiout = current_uiout;

	  if (uiout->is_mi_like_p ())
	    uiout->field_string
	      ("reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE));
	  uiout->text ("\nWatchpoint ");
	  uiout->field_int ("wpnum", b->number);
	  uiout->text (" deleted because the program has left the block in\n"
		       "which its expression is valid.\n");
	}

      /* Make sure the watchpoint's commands aren't executed.  */
      b->commands = NULL;
      watchpoint_del_at_next_stop (b);

      return WP_DELETED;
    }
}

/* Return true if it looks like target has stopped due to hitting
   breakpoint location BL.  This function does not check if we should
   stop, only if BL explains the stop.  */

static int
bpstat_check_location (const struct bp_location *bl,
		       const address_space *aspace, CORE_ADDR bp_addr,
		       const struct target_waitstatus *ws)
{
  struct breakpoint *b = bl->owner;

  /* BL is from an existing breakpoint.  */
  gdb_assert (b != NULL);

  return b->ops->breakpoint_hit (bl, aspace, bp_addr, ws);
}

/* Determine if the watched values have actually changed, and we
   should stop.  If not, set BS->stop to 0.  */

static void
bpstat_check_watchpoint (bpstat bs)
{
  const struct bp_location *bl;
  struct watchpoint *b;

  /* BS is built for existing struct breakpoint.  */
  bl = bs->bp_location_at;
  gdb_assert (bl != NULL);
  b = (struct watchpoint *) bs->breakpoint_at;
  gdb_assert (b != NULL);

    {
      int must_check_value = 0;
      
      if (b->type == bp_watchpoint)
	/* For a software watchpoint, we must always check the
	   watched value.  */
	must_check_value = 1;
      else if (b->watchpoint_triggered == watch_triggered_yes)
	/* We have a hardware watchpoint (read, write, or access)
	   and the target earlier reported an address watched by
	   this watchpoint.  */
	must_check_value = 1;
      else if (b->watchpoint_triggered == watch_triggered_unknown
	       && b->type == bp_hardware_watchpoint)
	/* We were stopped by a hardware watchpoint, but the target could
	   not report the data address.  We must check the watchpoint's
	   value.  Access and read watchpoints are out of luck; without
	   a data address, we can't figure it out.  */
	must_check_value = 1;

      if (must_check_value)
	{
	  wp_check_result e;

	  TRY
	    {
	      e = watchpoint_check (bs);
	    }
	  CATCH (ex, RETURN_MASK_ALL)
	    {
	      exception_fprintf (gdb_stderr, ex,
				 "Error evaluating expression "
				 "for watchpoint %d\n",
				 b->number);

	      SWITCH_THRU_ALL_UIS ()
		{
		  printf_filtered (_("Watchpoint %d deleted.\n"),
				   b->number);
		}
	      watchpoint_del_at_next_stop (b);
	      e = WP_DELETED;
	    }
	  END_CATCH

	  switch (e)
	    {
	    case WP_DELETED:
	      /* We've already printed what needs to be printed.  */
	      bs->print_it = print_it_done;
	      /* Stop.  */
	      break;
	    case WP_IGNORE:
	      bs->print_it = print_it_noop;
	      bs->stop = 0;
	      break;
	    case WP_VALUE_CHANGED:
	      if (b->type == bp_read_watchpoint)
		{
		  /* There are two cases to consider here:

		     1. We're watching the triggered memory for reads.
		     In that case, trust the target, and always report
		     the watchpoint hit to the user.  Even though
		     reads don't cause value changes, the value may
		     have changed since the last time it was read, and
		     since we're not trapping writes, we will not see
		     those, and as such we should ignore our notion of
		     old value.

		     2. We're watching the triggered memory for both
		     reads and writes.  There are two ways this may
		     happen:

		     2.1. This is a target that can't break on data
		     reads only, but can break on accesses (reads or
		     writes), such as e.g., x86.  We detect this case
		     at the time we try to insert read watchpoints.

		     2.2. Otherwise, the target supports read
		     watchpoints, but, the user set an access or write
		     watchpoint watching the same memory as this read
		     watchpoint.

		     If we're watching memory writes as well as reads,
		     ignore watchpoint hits when we find that the
		     value hasn't changed, as reads don't cause
		     changes.  This still gives false positives when
		     the program writes the same value to memory as
		     what there was already in memory (we will confuse
		     it for a read), but it's much better than
		     nothing.  */

		  int other_write_watchpoint = 0;

		  if (bl->watchpoint_type == hw_read)
		    {
		      struct breakpoint *other_b;

		      ALL_BREAKPOINTS (other_b)
			if (other_b->type == bp_hardware_watchpoint
			    || other_b->type == bp_access_watchpoint)
			  {
			    struct watchpoint *other_w =
			      (struct watchpoint *) other_b;

			    if (other_w->watchpoint_triggered
				== watch_triggered_yes)
			      {
				other_write_watchpoint = 1;
				break;
			      }
			  }
		    }

		  if (other_write_watchpoint
		      || bl->watchpoint_type == hw_access)
		    {
		      /* We're watching the same memory for writes,
			 and the value changed since the last time we
			 updated it, so this trap must be for a write.
			 Ignore it.  */
		      bs->print_it = print_it_noop;
		      bs->stop = 0;
		    }
		}
	      break;
	    case WP_VALUE_NOT_CHANGED:
	      if (b->type == bp_hardware_watchpoint
		  || b->type == bp_watchpoint)
		{
		  /* Don't stop: write watchpoints shouldn't fire if
		     the value hasn't changed.  */
		  bs->print_it = print_it_noop;
		  bs->stop = 0;
		}
	      /* Stop.  */
	      break;
	    default:
	      /* Can't happen.  */
	      break;
	    }
	}
      else	/* must_check_value == 0 */
	{
	  /* This is a case where some watchpoint(s) triggered, but
	     not at the address of this watchpoint, or else no
	     watchpoint triggered after all.  So don't print
	     anything for this watchpoint.  */
	  bs->print_it = print_it_noop;
	  bs->stop = 0;
	}
    }
}

/* For breakpoints that are currently marked as telling gdb to stop,
   check conditions (condition proper, frame, thread and ignore count)
   of breakpoint referred to by BS.  If we should not stop for this
   breakpoint, set BS->stop to 0.  */

static void
bpstat_check_breakpoint_conditions (bpstat bs, ptid_t ptid)
{
  const struct bp_location *bl;
  struct breakpoint *b;
  /* Assume stop.  */
  bool condition_result = true;
  struct expression *cond;

  gdb_assert (bs->stop);

  /* BS is built for existing struct breakpoint.  */
  bl = bs->bp_location_at;
  gdb_assert (bl != NULL);
  b = bs->breakpoint_at;
  gdb_assert (b != NULL);

  /* Even if the target evaluated the condition on its end and notified GDB, we
     need to do so again since GDB does not know if we stopped due to a
     breakpoint or a single step breakpoint.  */

  if (frame_id_p (b->frame_id)
      && !frame_id_eq (b->frame_id, get_stack_frame_id (get_current_frame ())))
    {
      bs->stop = 0;
      return;
    }

  /* If this is a thread/task-specific breakpoint, don't waste cpu
     evaluating the condition if this isn't the specified
     thread/task.  */
  if ((b->thread != -1 && b->thread != ptid_to_global_thread_id (ptid))
      || (b->task != 0 && b->task != ada_get_task_number (ptid)))

    {
      bs->stop = 0;
      return;
    }

  /* Evaluate extension language breakpoints that have a "stop" method
     implemented.  */
  bs->stop = breakpoint_ext_lang_cond_says_stop (b);

  if (is_watchpoint (b))
    {
      struct watchpoint *w = (struct watchpoint *) b;

      cond = w->cond_exp.get ();
    }
  else
    cond = bl->cond.get ();

  if (cond && b->disposition != disp_del_at_next_stop)
    {
      int within_current_scope = 1;
      struct watchpoint * w;

      /* We use value_mark and value_free_to_mark because it could
	 be a long time before we return to the command level and
	 call free_all_values.  We can't call free_all_values
	 because we might be in the middle of evaluating a
	 function call.  */
      struct value *mark = value_mark ();

      if (is_watchpoint (b))
	w = (struct watchpoint *) b;
      else
	w = NULL;

      /* Need to select the frame, with all that implies so that
	 the conditions will have the right context.  Because we
	 use the frame, we will not see an inlined function's
	 variables when we arrive at a breakpoint at the start
	 of the inlined function; the current frame will be the
	 call site.  */
      if (w == NULL || w->cond_exp_valid_block == NULL)
	select_frame (get_current_frame ());
      else
	{
	  struct frame_info *frame;

	  /* For local watchpoint expressions, which particular
	     instance of a local is being watched matters, so we
	     keep track of the frame to evaluate the expression
	     in.  To evaluate the condition however, it doesn't
	     really matter which instantiation of the function
	     where the condition makes sense triggers the
	     watchpoint.  This allows an expression like "watch
	     global if q > 10" set in `func', catch writes to
	     global on all threads that call `func', or catch
	     writes on all recursive calls of `func' by a single
	     thread.  We simply always evaluate the condition in
	     the innermost frame that's executing where it makes
	     sense to evaluate the condition.  It seems
	     intuitive.  */
	  frame = block_innermost_frame (w->cond_exp_valid_block);
	  if (frame != NULL)
	    select_frame (frame);
	  else
	    within_current_scope = 0;
	}
      if (within_current_scope)
	{
	  TRY
	    {
	      condition_result = breakpoint_cond_eval (cond);
	    }
	  CATCH (ex, RETURN_MASK_ALL)
	    {
	      exception_fprintf (gdb_stderr, ex,
				 "Error in testing breakpoint condition:\n");
	    }
	  END_CATCH
	}
      else
	{
	  warning (_("Watchpoint condition cannot be tested "
		     "in the current scope"));
	  /* If we failed to set the right context for this
	     watchpoint, unconditionally report it.  */
	}
      /* FIXME-someday, should give breakpoint #.  */
      value_free_to_mark (mark);
    }

  if (cond && !condition_result)
    {
      bs->stop = 0;
    }
  else if (b->ignore_count > 0)
    {
      b->ignore_count--;
      bs->stop = 0;
      /* Increase the hit count even though we don't stop.  */
      ++(b->hit_count);
      gdb::observers::breakpoint_modified.notify (b);
    }	
}

/* Returns true if we need to track moribund locations of LOC's type
   on the current target.  */

static int
need_moribund_for_location_type (struct bp_location *loc)
{
  return ((loc->loc_type == bp_loc_software_breakpoint
	   && !target_supports_stopped_by_sw_breakpoint ())
	  || (loc->loc_type == bp_loc_hardware_breakpoint
	      && !target_supports_stopped_by_hw_breakpoint ()));
}


/* Get a bpstat associated with having just stopped at address
   BP_ADDR in thread PTID.

   Determine whether we stopped at a breakpoint, etc, or whether we
   don't understand this stop.  Result is a chain of bpstat's such
   that:

   if we don't understand the stop, the result is a null pointer.

   if we understand why we stopped, the result is not null.

   Each element of the chain refers to a particular breakpoint or
   watchpoint at which we have stopped.  (We may have stopped for
   several reasons concurrently.)

   Each element of the chain has valid next, breakpoint_at,
   commands, FIXME??? fields.  */

bpstat
bpstat_stop_status (const address_space *aspace,
		    CORE_ADDR bp_addr, ptid_t ptid,
		    const struct target_waitstatus *ws)
{
  struct breakpoint *b = NULL;
  struct bp_location *bl;
  struct bp_location *loc;
  /* First item of allocated bpstat's.  */
  bpstat bs_head = NULL, *bs_link = &bs_head;
  /* Pointer to the last thing in the chain currently.  */
  bpstat bs;
  int ix;
  int need_remove_insert;
  int removed_any;

  /* First, build the bpstat chain with locations that explain a
     target stop, while being careful to not set the target running,
     as that may invalidate locations (in particular watchpoint
     locations are recreated).  Resuming will happen here with
     breakpoint conditions or watchpoint expressions that include
     inferior function calls.  */

  ALL_BREAKPOINTS (b)
    {
      if (!breakpoint_enabled (b))
	continue;

      for (bl = b->loc; bl != NULL; bl = bl->next)
	{
	  /* For hardware watchpoints, we look only at the first
	     location.  The watchpoint_check function will work on the
	     entire expression, not the individual locations.  For
	     read watchpoints, the watchpoints_triggered function has
	     checked all locations already.  */
	  if (b->type == bp_hardware_watchpoint && bl != b->loc)
	    break;

	  if (!bl->enabled || bl->shlib_disabled)
	    continue;

	  if (!bpstat_check_location (bl, aspace, bp_addr, ws))
	    continue;

	  /* Come here if it's a watchpoint, or if the break address
	     matches.  */

	  bs = new bpstats (bl, &bs_link);	/* Alloc a bpstat to
						   explain stop.  */

	  /* Assume we stop.  Should we find a watchpoint that is not
	     actually triggered, or if the condition of the breakpoint
	     evaluates as false, we'll reset 'stop' to 0.  */
	  bs->stop = 1;
	  bs->print = 1;

	  /* If this is a scope breakpoint, mark the associated
	     watchpoint as triggered so that we will handle the
	     out-of-scope event.  We'll get to the watchpoint next
	     iteration.  */
	  if (b->type == bp_watchpoint_scope && b->related_breakpoint != b)
	    {
	      struct watchpoint *w = (struct watchpoint *) b->related_breakpoint;

	      w->watchpoint_triggered = watch_triggered_yes;
	    }
	}
    }

  /* Check if a moribund breakpoint explains the stop.  */
  if (!target_supports_stopped_by_sw_breakpoint ()
      || !target_supports_stopped_by_hw_breakpoint ())
    {
      for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix)
	{
	  if (breakpoint_location_address_match (loc, aspace, bp_addr)
	      && need_moribund_for_location_type (loc))
	    {
	      bs = new bpstats (loc, &bs_link);
	      /* For hits of moribund locations, we should just proceed.  */
	      bs->stop = 0;
	      bs->print = 0;
	      bs->print_it = print_it_noop;
	    }
	}
    }

  /* A bit of special processing for shlib breakpoints.  We need to
     process solib loading here, so that the lists of loaded and
     unloaded libraries are correct before we handle "catch load" and
     "catch unload".  */
  for (bs = bs_head; bs != NULL; bs = bs->next)
    {
      if (bs->breakpoint_at && bs->breakpoint_at->type == bp_shlib_event)
	{
	  handle_solib_event ();
	  break;
	}
    }

  /* Now go through the locations that caused the target to stop, and
     check whether we're interested in reporting this stop to higher
     layers, or whether we should resume the target transparently.  */

  removed_any = 0;

  for (bs = bs_head; bs != NULL; bs = bs->next)
    {
      if (!bs->stop)
	continue;

      b = bs->breakpoint_at;
      b->ops->check_status (bs);
      if (bs->stop)
	{
	  bpstat_check_breakpoint_conditions (bs, ptid);

	  if (bs->stop)
	    {
	      ++(b->hit_count);
	      gdb::observers::breakpoint_modified.notify (b);

	      /* We will stop here.  */
	      if (b->disposition == disp_disable)
		{
		  --(b->enable_count);
		  if (b->enable_count <= 0)
		    b->enable_state = bp_disabled;
		  removed_any = 1;
		}
	      if (b->silent)
		bs->print = 0;
	      bs->commands = b->commands;
	      if (command_line_is_silent (bs->commands
					  ? bs->commands.get () : NULL))
		bs->print = 0;

	      b->ops->after_condition_true (bs);
	    }

	}

      /* Print nothing for this entry if we don't stop or don't
	 print.  */
      if (!bs->stop || !bs->print)
	bs->print_it = print_it_noop;
    }

  /* If we aren't stopping, the value of some hardware watchpoint may
     not have changed, but the intermediate memory locations we are
     watching may have.  Don't bother if we're stopping; this will get
     done later.  */
  need_remove_insert = 0;
  if (! bpstat_causes_stop (bs_head))
    for (bs = bs_head; bs != NULL; bs = bs->next)
      if (!bs->stop
	  && bs->breakpoint_at
	  && is_hardware_watchpoint (bs->breakpoint_at))
	{
	  struct watchpoint *w = (struct watchpoint *) bs->breakpoint_at;

	  update_watchpoint (w, 0 /* don't reparse.  */);
	  need_remove_insert = 1;
	}

  if (need_remove_insert)
    update_global_location_list (UGLL_MAY_INSERT);
  else if (removed_any)
    update_global_location_list (UGLL_DONT_INSERT);

  return bs_head;
}

static void
handle_jit_event (void)
{
  struct frame_info *frame;
  struct gdbarch *gdbarch;

  if (debug_infrun)
    fprintf_unfiltered (gdb_stdlog, "handling bp_jit_event\n");

  /* Switch terminal for any messages produced by
     breakpoint_re_set.  */
  target_terminal::ours_for_output ();

  frame = get_current_frame ();
  gdbarch = get_frame_arch (frame);

  jit_event_handler (gdbarch);

  target_terminal::inferior ();
}

/* Prepare WHAT final decision for infrun.  */

/* Decide what infrun needs to do with this bpstat.  */

struct bpstat_what
bpstat_what (bpstat bs_head)
{
  struct bpstat_what retval;
  bpstat bs;

  retval.main_action = BPSTAT_WHAT_KEEP_CHECKING;
  retval.call_dummy = STOP_NONE;
  retval.is_longjmp = 0;

  for (bs = bs_head; bs != NULL; bs = bs->next)
    {
      /* Extract this BS's action.  After processing each BS, we check
	 if its action overrides all we've seem so far.  */
      enum bpstat_what_main_action this_action = BPSTAT_WHAT_KEEP_CHECKING;
      enum bptype bptype;

      if (bs->breakpoint_at == NULL)
	{
	  /* I suspect this can happen if it was a momentary
	     breakpoint which has since been deleted.  */
	  bptype = bp_none;
	}
      else
	bptype = bs->breakpoint_at->type;

      switch (bptype)
	{
	case bp_none:
	  break;
	case bp_breakpoint:
	case bp_hardware_breakpoint:
	case bp_single_step:
	case bp_until:
	case bp_finish:
	case bp_shlib_event:
	  if (bs->stop)
	    {
	      if (bs->print)
		this_action = BPSTAT_WHAT_STOP_NOISY;
	      else
		this_action = BPSTAT_WHAT_STOP_SILENT;
	    }
	  else
	    this_action = BPSTAT_WHAT_SINGLE;
	  break;
	case bp_watchpoint:
	case bp_hardware_watchpoint:
	case bp_read_watchpoint:
	case bp_access_watchpoint:
	  if (bs->stop)
	    {
	      if (bs->print)
		this_action = BPSTAT_WHAT_STOP_NOISY;
	      else
		this_action = BPSTAT_WHAT_STOP_SILENT;
	    }
	  else
	    {
	      /* There was a watchpoint, but we're not stopping.
		 This requires no further action.  */
	    }
	  break;
	case bp_longjmp:
	case bp_longjmp_call_dummy:
	case bp_exception:
	  if (bs->stop)
	    {
	      this_action = BPSTAT_WHAT_SET_LONGJMP_RESUME;
	      retval.is_longjmp = bptype != bp_exception;
	    }
	  else
	    this_action = BPSTAT_WHAT_SINGLE;
	  break;
	case bp_longjmp_resume:
	case bp_exception_resume:
	  if (bs->stop)
	    {
	      this_action = BPSTAT_WHAT_CLEAR_LONGJMP_RESUME;
	      retval.is_longjmp = bptype == bp_longjmp_resume;
	    }
	  else
	    this_action = BPSTAT_WHAT_SINGLE;
	  break;
	case bp_step_resume:
	  if (bs->stop)
	    this_action = BPSTAT_WHAT_STEP_RESUME;
	  else
	    {
	      /* It is for the wrong frame.  */
	      this_action = BPSTAT_WHAT_SINGLE;
	    }
	  break;
	case bp_hp_step_resume:
	  if (bs->stop)
	    this_action = BPSTAT_WHAT_HP_STEP_RESUME;
	  else
	    {
	      /* It is for the wrong frame.  */
	      this_action = BPSTAT_WHAT_SINGLE;
	    }
	  break;
	case bp_watchpoint_scope:
	case bp_thread_event:
	case bp_overlay_event:
	case bp_longjmp_master:
	case bp_std_terminate_master:
	case bp_exception_master:
	  this_action = BPSTAT_WHAT_SINGLE;
	  break;
	case bp_catchpoint:
	  if (bs->stop)
	    {
	      if (bs->print)
		this_action = BPSTAT_WHAT_STOP_NOISY;
	      else
		this_action = BPSTAT_WHAT_STOP_SILENT;
	    }
	  else
	    {
	      /* There was a catchpoint, but we're not stopping.
		 This requires no further action.  */
	    }
	  break;
	case bp_jit_event:
	  this_action = BPSTAT_WHAT_SINGLE;
	  break;
	case bp_call_dummy:
	  /* Make sure the action is stop (silent or noisy),
	     so infrun.c pops the dummy frame.  */
	  retval.call_dummy = STOP_STACK_DUMMY;
	  this_action = BPSTAT_WHAT_STOP_SILENT;
	  break;
	case bp_std_terminate:
	  /* Make sure the action is stop (silent or noisy),
	     so infrun.c pops the dummy frame.  */
	  retval.call_dummy = STOP_STD_TERMINATE;
	  this_action = BPSTAT_WHAT_STOP_SILENT;
	  break;
	case bp_tracepoint:
	case bp_fast_tracepoint:
	case bp_static_tracepoint:
	  /* Tracepoint hits should not be reported back to GDB, and
	     if one got through somehow, it should have been filtered
	     out already.  */
	  internal_error (__FILE__, __LINE__,
			  _("bpstat_what: tracepoint encountered"));
	  break;
	case bp_gnu_ifunc_resolver:
	  /* Step over it (and insert bp_gnu_ifunc_resolver_return).  */
	  this_action = BPSTAT_WHAT_SINGLE;
	  break;
	case bp_gnu_ifunc_resolver_return:
	  /* The breakpoint will be removed, execution will restart from the
	     PC of the former breakpoint.  */
	  this_action = BPSTAT_WHAT_KEEP_CHECKING;
	  break;

	case bp_dprintf:
	  if (bs->stop)
	    this_action = BPSTAT_WHAT_STOP_SILENT;
	  else
	    this_action = BPSTAT_WHAT_SINGLE;
	  break;

	default:
	  internal_error (__FILE__, __LINE__,
			  _("bpstat_what: unhandled bptype %d"), (int) bptype);
	}

      retval.main_action = std::max (retval.main_action, this_action);
    }

  return retval;
}

void
bpstat_run_callbacks (bpstat bs_head)
{
  bpstat bs;

  for (bs = bs_head; bs != NULL; bs = bs->next)
    {
      struct breakpoint *b = bs->breakpoint_at;

      if (b == NULL)
	continue;
      switch (b->type)
	{
	case bp_jit_event:
	  handle_jit_event ();
	  break;
	case bp_gnu_ifunc_resolver:
	  gnu_ifunc_resolver_stop (b);
	  break;
	case bp_gnu_ifunc_resolver_return:
	  gnu_ifunc_resolver_return_stop (b);
	  break;
	}
    }
}

/* Nonzero if we should step constantly (e.g. watchpoints on machines
   without hardware support).  This isn't related to a specific bpstat,
   just to things like whether watchpoints are set.  */

int
bpstat_should_step (void)
{
  struct breakpoint *b;

  ALL_BREAKPOINTS (b)
    if (breakpoint_enabled (b) && b->type == bp_watchpoint && b->loc != NULL)
      return 1;
  return 0;
}

int
bpstat_causes_stop (bpstat bs)
{
  for (; bs != NULL; bs = bs->next)
    if (bs->stop)
      return 1;

  return 0;
}



/* Compute a string of spaces suitable to indent the next line
   so it starts at the position corresponding to the table column
   named COL_NAME in the currently active table of UIOUT.  */

static char *
wrap_indent_at_field (struct ui_out *uiout, const char *col_name)
{
  static char wrap_indent[80];
  int i, total_width, width, align;
  const char *text;

  total_width = 0;
  for (i = 1; uiout->query_table_field (i, &width, &align, &text); i++)
    {
      if (strcmp (text, col_name) == 0)
	{
	  gdb_assert (total_width < sizeof wrap_indent);
	  memset (wrap_indent, ' ', total_width);
	  wrap_indent[total_width] = 0;

	  return wrap_indent;
	}

      total_width += width + 1;
    }

  return NULL;
}

/* Determine if the locations of this breakpoint will have their conditions
   evaluated by the target, host or a mix of both.  Returns the following:

    "host": Host evals condition.
    "host or target": Host or Target evals condition.
    "target": Target evals condition.
*/

static const char *
bp_condition_evaluator (struct breakpoint *b)
{
  struct bp_location *bl;
  char host_evals = 0;
  char target_evals = 0;

  if (!b)
    return NULL;

  if (!is_breakpoint (b))
    return NULL;

  if (gdb_evaluates_breakpoint_condition_p ()
      || !target_supports_evaluation_of_breakpoint_conditions ())
    return condition_evaluation_host;

  for (bl = b->loc; bl; bl = bl->next)
    {
      if (bl->cond_bytecode)
	target_evals++;
      else
	host_evals++;
    }

  if (host_evals && target_evals)
    return condition_evaluation_both;
  else if (target_evals)
    return condition_evaluation_target;
  else
    return condition_evaluation_host;
}

/* Determine the breakpoint location's condition evaluator.  This is
   similar to bp_condition_evaluator, but for locations.  */

static const char *
bp_location_condition_evaluator (struct bp_location *bl)
{
  if (bl && !is_breakpoint (bl->owner))
    return NULL;

  if (gdb_evaluates_breakpoint_condition_p ()
      || !target_supports_evaluation_of_breakpoint_conditions ())
    return condition_evaluation_host;

  if (bl && bl->cond_bytecode)
    return condition_evaluation_target;
  else
    return condition_evaluation_host;
}

/* Print the LOC location out of the list of B->LOC locations.  */

static void
print_breakpoint_location (struct breakpoint *b,
			   struct bp_location *loc)
{
  struct ui_out *uiout = current_uiout;

  scoped_restore_current_program_space restore_pspace;

  if (loc != NULL && loc->shlib_disabled)
    loc = NULL;

  if (loc != NULL)
    set_current_program_space (loc->pspace);

  if (b->display_canonical)
    uiout->field_string ("what", event_location_to_string (b->location.get ()));
  else if (loc && loc->symtab)
    {
      const struct symbol *sym = loc->symbol;

      if (sym == NULL)
	sym = find_pc_sect_function (loc->address, loc->section);

      if (sym)
	{
	  uiout->text ("in ");
	  uiout->field_string ("func", SYMBOL_PRINT_NAME (sym));
	  uiout->text (" ");
	  uiout->wrap_hint (wrap_indent_at_field (uiout, "what"));
	  uiout->text ("at ");
	}
      uiout->field_string ("file",
			   symtab_to_filename_for_display (loc->symtab));
      uiout->text (":");

      if (uiout->is_mi_like_p ())
	uiout->field_string ("fullname", symtab_to_fullname (loc->symtab));
      
      uiout->field_int ("line", loc->line_number);
    }
  else if (loc)
    {
      string_file stb;

      print_address_symbolic (loc->gdbarch, loc->address, &stb,
			      demangle, "");
      uiout->field_stream ("at", stb);
    }
  else
    {
      uiout->field_string ("pending",
			   event_location_to_string (b->location.get ()));
      /* If extra_string is available, it could be holding a condition
	 or dprintf arguments.  In either case, make sure it is printed,
	 too, but only for non-MI streams.  */
      if (!uiout->is_mi_like_p () && b->extra_string != NULL)
	{
	  if (b->type == bp_dprintf)
	    uiout->text (",");
	  else
	    uiout->text (" ");
	  uiout->text (b->extra_string);
	}
    }

  if (loc && is_breakpoint (b)
      && breakpoint_condition_evaluation_mode () == condition_evaluation_target
      && bp_condition_evaluator (b) == condition_evaluation_both)
    {
      uiout->text (" (");
      uiout->field_string ("evaluated-by",
			   bp_location_condition_evaluator (loc));
      uiout->text (")");
    }
}

static const char *
bptype_string (enum bptype type)
{
  struct ep_type_description
    {
      enum bptype type;
      const char *description;
    };
  static struct ep_type_description bptypes[] =
  {
    {bp_none, "?deleted?"},
    {bp_breakpoint, "breakpoint"},
    {bp_hardware_breakpoint, "hw breakpoint"},
    {bp_single_step, "sw single-step"},
    {bp_until, "until"},
    {bp_finish, "finish"},
    {bp_watchpoint, "watchpoint"},
    {bp_hardware_watchpoint, "hw watchpoint"},
    {bp_read_watchpoint, "read watchpoint"},
    {bp_access_watchpoint, "acc watchpoint"},
    {bp_longjmp, "longjmp"},
    {bp_longjmp_resume, "longjmp resume"},
    {bp_longjmp_call_dummy, "longjmp for call dummy"},
    {bp_exception, "exception"},
    {bp_exception_resume, "exception resume"},
    {bp_step_resume, "step resume"},
    {bp_hp_step_resume, "high-priority step resume"},
    {bp_watchpoint_scope, "watchpoint scope"},
    {bp_call_dummy, "call dummy"},
    {bp_std_terminate, "std::terminate"},
    {bp_shlib_event, "shlib events"},
    {bp_thread_event, "thread events"},
    {bp_overlay_event, "overlay events"},
    {bp_longjmp_master, "longjmp master"},
    {bp_std_terminate_master, "std::terminate master"},
    {bp_exception_master, "exception master"},
    {bp_catchpoint, "catchpoint"},
    {bp_tracepoint, "tracepoint"},
    {bp_fast_tracepoint, "fast tracepoint"},
    {bp_static_tracepoint, "static tracepoint"},
    {bp_dprintf, "dprintf"},
    {bp_jit_event, "jit events"},
    {bp_gnu_ifunc_resolver, "STT_GNU_IFUNC resolver"},
    {bp_gnu_ifunc_resolver_return, "STT_GNU_IFUNC resolver return"},
  };

  if (((int) type >= (sizeof (bptypes) / sizeof (bptypes[0])))
      || ((int) type != bptypes[(int) type].type))
    internal_error (__FILE__, __LINE__,
		    _("bptypes table does not describe type #%d."),
		    (int) type);

  return bptypes[(int) type].description;
}

/* For MI, output a field named 'thread-groups' with a list as the value.
   For CLI, prefix the list with the string 'inf'. */

static void
output_thread_groups (struct ui_out *uiout,
		      const char *field_name,
		      const std::vector<int> &inf_nums,
		      int mi_only)
{
  int is_mi = uiout->is_mi_like_p ();

  /* For backward compatibility, don't display inferiors in CLI unless
     there are several.  Always display them for MI. */
  if (!is_mi && mi_only)
    return;

  ui_out_emit_list list_emitter (uiout, field_name);

  for (size_t i = 0; i < inf_nums.size (); i++)
    {
      if (is_mi)
	{
	  char mi_group[10];

	  xsnprintf (mi_group, sizeof (mi_group), "i%d", inf_nums[i]);
	  uiout->field_string (NULL, mi_group);
	}
      else
	{
	  if (i == 0)
	    uiout->text (" inf ");
	  else
	    uiout->text (", ");
	
	  uiout->text (plongest (inf_nums[i]));
	}
    }
}

/* Print B to gdb_stdout.  */

static void
print_one_breakpoint_location (struct breakpoint *b,
			       struct bp_location *loc,
			       int loc_number,
			       struct bp_location **last_loc,
			       int allflag)
{
  struct command_line *l;
  static char bpenables[] = "nynny";

  struct ui_out *uiout = current_uiout;
  int header_of_multiple = 0;
  int part_of_multiple = (loc != NULL);
  struct value_print_options opts;

  get_user_print_options (&opts);

  gdb_assert (!loc || loc_number != 0);
  /* See comment in print_one_breakpoint concerning treatment of
     breakpoints with single disabled location.  */
  if (loc == NULL 
      && (b->loc != NULL 
	  && (b->loc->next != NULL || !b->loc->enabled)))
    header_of_multiple = 1;
  if (loc == NULL)
    loc = b->loc;

  annotate_record ();

  /* 1 */
  annotate_field (0);
  if (part_of_multiple)
    {
      char *formatted;
      formatted = xstrprintf ("%d.%d", b->number, loc_number);
      uiout->field_string ("number", formatted);
      xfree (formatted);
    }
  else
    {
      uiout->field_int ("number", b->number);
    }

  /* 2 */
  annotate_field (1);
  if (part_of_multiple)
    uiout->field_skip ("type");
  else
    uiout->field_string ("type", bptype_string (b->type));

  /* 3 */
  annotate_field (2);
  if (part_of_multiple)
    uiout->field_skip ("disp");
  else
    uiout->field_string ("disp", bpdisp_text (b->disposition));


  /* 4 */
  annotate_field (3);
  if (part_of_multiple)
    uiout->field_string ("enabled", loc->enabled ? "y" : "n");
  else
    uiout->field_fmt ("enabled", "%c", bpenables[(int) b->enable_state]);
  uiout->spaces (2);

  
  /* 5 and 6 */
  if (b->ops != NULL && b->ops->print_one != NULL)
    {
      /* Although the print_one can possibly print all locations,
	 calling it here is not likely to get any nice result.  So,
	 make sure there's just one location.  */
      gdb_assert (b->loc == NULL || b->loc->next == NULL);
      b->ops->print_one (b, last_loc);
    }
  else
    switch (b->type)
      {
      case bp_none:
	internal_error (__FILE__, __LINE__,
			_("print_one_breakpoint: bp_none encountered\n"));
	break;

      case bp_watchpoint:
      case bp_hardware_watchpoint:
      case bp_read_watchpoint:
      case bp_access_watchpoint:
	{
	  struct watchpoint *w = (struct watchpoint *) b;

	  /* Field 4, the address, is omitted (which makes the columns
	     not line up too nicely with the headers, but the effect
	     is relatively readable).  */
	  if (opts.addressprint)
	    uiout->field_skip ("addr");
	  annotate_field (5);
	  uiout->field_string ("what", w->exp_string);
	}
	break;

      case bp_breakpoint:
      case bp_hardware_breakpoint:
      case bp_single_step:
      case bp_until:
      case bp_finish:
      case bp_longjmp:
      case bp_longjmp_resume:
      case bp_longjmp_call_dummy:
      case bp_exception:
      case bp_exception_resume:
      case bp_step_resume:
      case bp_hp_step_resume:
      case bp_watchpoint_scope:
      case bp_call_dummy:
      case bp_std_terminate:
      case bp_shlib_event:
      case bp_thread_event:
      case bp_overlay_event:
      case bp_longjmp_master:
      case bp_std_terminate_master:
      case bp_exception_master:
      case bp_tracepoint:
      case bp_fast_tracepoint:
      case bp_static_tracepoint:
      case bp_dprintf:
      case bp_jit_event:
      case bp_gnu_ifunc_resolver:
      case bp_gnu_ifunc_resolver_return:
	if (opts.addressprint)
	  {
	    annotate_field (4);
	    if (header_of_multiple)
	      uiout->field_string ("addr", "<MULTIPLE>");
	    else if (b->loc == NULL || loc->shlib_disabled)
	      uiout->field_string ("addr", "<PENDING>");
	    else
	      uiout->field_core_addr ("addr",
				      loc->gdbarch, loc->address);
	  }
	annotate_field (5);
	if (!header_of_multiple)
	  print_breakpoint_location (b, loc);
	if (b->loc)
	  *last_loc = b->loc;
	break;
      }


  if (loc != NULL && !header_of_multiple)
    {
      struct inferior *inf;
      std::vector<int> inf_nums;
      int mi_only = 1;

      ALL_INFERIORS (inf)
	{
	  if (inf->pspace == loc->pspace)
	    inf_nums.push_back (inf->num);
	}

        /* For backward compatibility, don't display inferiors in CLI unless
	   there are several.  Always display for MI. */
	if (allflag
	    || (!gdbarch_has_global_breakpoints (target_gdbarch ())
		&& (number_of_program_spaces () > 1
		    || number_of_inferiors () > 1)
		/* LOC is for existing B, it cannot be in
		   moribund_locations and thus having NULL OWNER.  */
		&& loc->owner->type != bp_catchpoint))
	mi_only = 0;
      output_thread_groups (uiout, "thread-groups", inf_nums, mi_only);
    }

  if (!part_of_multiple)
    {
      if (b->thread != -1)
	{
	  /* FIXME: This seems to be redundant and lost here; see the
	     "stop only in" line a little further down.  */
	  uiout->text (" thread ");
	  uiout->field_int ("thread", b->thread);
	}
      else if (b->task != 0)
	{
	  uiout->text (" task ");
	  uiout->field_int ("task", b->task);
	}
    }

  uiout->text ("\n");

  if (!part_of_multiple)
    b->ops->print_one_detail (b, uiout);

  if (part_of_multiple && frame_id_p (b->frame_id))
    {
      annotate_field (6);
      uiout->text ("\tstop only in stack frame at ");
      /* FIXME: cagney/2002-12-01: Shouldn't be poking around inside
         the frame ID.  */
      uiout->field_core_addr ("frame",
			      b->gdbarch, b->frame_id.stack_addr);
      uiout->text ("\n");
    }
  
  if (!part_of_multiple && b->cond_string)
    {
      annotate_field (7);
      if (is_tracepoint (b))
	uiout->text ("\ttrace only if ");
      else
	uiout->text ("\tstop only if ");
      uiout->field_string ("cond", b->cond_string);

      /* Print whether the target is doing the breakpoint's condition
	 evaluation.  If GDB is doing the evaluation, don't print anything.  */
      if (is_breakpoint (b)
	  && breakpoint_condition_evaluation_mode ()
	  == condition_evaluation_target)
	{
	  uiout->text (" (");
	  uiout->field_string ("evaluated-by",
			       bp_condition_evaluator (b));
	  uiout->text (" evals)");
	}
      uiout->text ("\n");
    }

  if (!part_of_multiple && b->thread != -1)
    {
      /* FIXME should make an annotation for this.  */
      uiout->text ("\tstop only in thread ");
      if (uiout->is_mi_like_p ())
	uiout->field_int ("thread", b->thread);
      else
	{
	  struct thread_info *thr = find_thread_global_id (b->thread);

	  uiout->field_string ("thread", print_thread_id (thr));
	}
      uiout->text ("\n");
    }
  
  if (!part_of_multiple)
    {
      if (b->hit_count)
	{
	  /* FIXME should make an annotation for this.  */
	  if (is_catchpoint (b))
	    uiout->text ("\tcatchpoint");
	  else if (is_tracepoint (b))
	    uiout->text ("\ttracepoint");
	  else
	    uiout->text ("\tbreakpoint");
	  uiout->text (" already hit ");
	  uiout->field_int ("times", b->hit_count);
	  if (b->hit_count == 1)
	    uiout->text (" time\n");
	  else
	    uiout->text (" times\n");
	}
      else
	{
	  /* Output the count also if it is zero, but only if this is mi.  */
	  if (uiout->is_mi_like_p ())
	    uiout->field_int ("times", b->hit_count);
	}
    }

  if (!part_of_multiple && b->ignore_count)
    {
      annotate_field (8);
      uiout->text ("\tignore next ");
      uiout->field_int ("ignore", b->ignore_count);
      uiout->text (" hits\n");
    }

  /* Note that an enable count of 1 corresponds to "enable once"
     behavior, which is reported by the combination of enablement and
     disposition, so we don't need to mention it here.  */
  if (!part_of_multiple && b->enable_count > 1)
    {
      annotate_field (8);
      uiout->text ("\tdisable after ");
      /* Tweak the wording to clarify that ignore and enable counts
	 are distinct, and have additive effect.  */
      if (b->ignore_count)
	uiout->text ("additional ");
      else
	uiout->text ("next ");
      uiout->field_int ("enable", b->enable_count);
      uiout->text (" hits\n");
    }

  if (!part_of_multiple && is_tracepoint (b))
    {
      struct tracepoint *tp = (struct tracepoint *) b;

      if (tp->traceframe_usage)
	{
	  uiout->text ("\ttrace buffer usage ");
	  uiout->field_int ("traceframe-usage", tp->traceframe_usage);
	  uiout->text (" bytes\n");
	}
    }

  l = b->commands ? b->commands.get () : NULL;
  if (!part_of_multiple && l)
    {
      annotate_field (9);
      ui_out_emit_tuple tuple_emitter (uiout, "script");
      print_command_lines (uiout, l, 4);
    }

  if (is_tracepoint (b))
    {
      struct tracepoint *t = (struct tracepoint *) b;

      if (!part_of_multiple && t->pass_count)
	{
	  annotate_field (10);
	  uiout->text ("\tpass count ");
	  uiout->field_int ("pass", t->pass_count);
	  uiout->text (" \n");
	}

      /* Don't display it when tracepoint or tracepoint location is
	 pending.   */
      if (!header_of_multiple && loc != NULL && !loc->shlib_disabled)
	{
	  annotate_field (11);

	  if (uiout->is_mi_like_p ())
	    uiout->field_string ("installed",
				 loc->inserted ? "y" : "n");
	  else
	    {
	      if (loc->inserted)
		uiout->text ("\t");
	      else
		uiout->text ("\tnot ");
	      uiout->text ("installed on target\n");
	    }
	}
    }

  if (uiout->is_mi_like_p () && !part_of_multiple)
    {
      if (is_watchpoint (b))
	{
	  struct watchpoint *w = (struct watchpoint *) b;

	  uiout->field_string ("original-location", w->exp_string);
	}
      else if (b->location != NULL
	       && event_location_to_string (b->location.get ()) != NULL)
	uiout->field_string ("original-location",
			     event_location_to_string (b->location.get ()));
    }
}

static void
print_one_breakpoint (struct breakpoint *b,
		      struct bp_location **last_loc, 
		      int allflag)
{
  struct ui_out *uiout = current_uiout;

  {
    ui_out_emit_tuple tuple_emitter (uiout, "bkpt");

    print_one_breakpoint_location (b, NULL, 0, last_loc, allflag);
  }

  /* If this breakpoint has custom print function,
     it's already printed.  Otherwise, print individual
     locations, if any.  */
  if (b->ops == NULL || b->ops->print_one == NULL)
    {
      /* If breakpoint has a single location that is disabled, we
	 print it as if it had several locations, since otherwise it's
	 hard to represent "breakpoint enabled, location disabled"
	 situation.

	 Note that while hardware watchpoints have several locations
	 internally, that's not a property exposed to user.  */
      if (b->loc 
	  && !is_hardware_watchpoint (b)
	  && (b->loc->next || !b->loc->enabled))
	{
	  struct bp_location *loc;
	  int n = 1;

	  for (loc = b->loc; loc; loc = loc->next, ++n)
	    {
	      ui_out_emit_tuple tuple_emitter (uiout, NULL);
	      print_one_breakpoint_location (b, loc, n, last_loc, allflag);
	    }
	}
    }
}

static int
breakpoint_address_bits (struct breakpoint *b)
{
  int print_address_bits = 0;
  struct bp_location *loc;

  /* Software watchpoints that aren't watching memory don't have an
     address to print.  */
  if (is_no_memory_software_watchpoint (b))
    return 0;

  for (loc = b->loc; loc; loc = loc->next)
    {
      int addr_bit;

      addr_bit = gdbarch_addr_bit (loc->gdbarch);
      if (addr_bit > print_address_bits)
	print_address_bits = addr_bit;
    }

  return print_address_bits;
}

/* See breakpoint.h.  */

void
print_breakpoint (breakpoint *b)
{
  struct bp_location *dummy_loc = NULL;
  print_one_breakpoint (b, &dummy_loc, 0);
}

/* Return true if this breakpoint was set by the user, false if it is
   internal or momentary.  */

int
user_breakpoint_p (struct breakpoint *b)
{
  return b->number > 0;
}

/* See breakpoint.h.  */

int
pending_breakpoint_p (struct breakpoint *b)
{
  return b->loc == NULL;
}

/* Print information on user settable breakpoint (watchpoint, etc)
   number BNUM.  If BNUM is -1 print all user-settable breakpoints.
   If ALLFLAG is non-zero, include non-user-settable breakpoints.  If
   FILTER is non-NULL, call it on each breakpoint and only include the
   ones for which it returns non-zero.  Return the total number of
   breakpoints listed.  */

static int
breakpoint_1 (const char *args, int allflag, 
	      int (*filter) (const struct breakpoint *))
{
  struct breakpoint *b;
  struct bp_location *last_loc = NULL;
  int nr_printable_breakpoints;
  struct value_print_options opts;
  int print_address_bits = 0;
  int print_type_col_width = 14;
  struct ui_out *uiout = current_uiout;

  get_user_print_options (&opts);

  /* Compute the number of rows in the table, as well as the size
     required for address fields.  */
  nr_printable_breakpoints = 0;
  ALL_BREAKPOINTS (b)
    {
      /* If we have a filter, only list the breakpoints it accepts.  */
      if (filter && !filter (b))
	continue;

      /* If we have an "args" string, it is a list of breakpoints to 
	 accept.  Skip the others.  */
      if (args != NULL && *args != '\0')
	{
	  if (allflag && parse_and_eval_long (args) != b->number)
	    continue;
	  if (!allflag && !number_is_in_list (args, b->number))
	    continue;
	}

      if (allflag || user_breakpoint_p (b))
	{
	  int addr_bit, type_len;

	  addr_bit = breakpoint_address_bits (b);
	  if (addr_bit > print_address_bits)
	    print_address_bits = addr_bit;

	  type_len = strlen (bptype_string (b->type));
	  if (type_len > print_type_col_width)
	    print_type_col_width = type_len;

	  nr_printable_breakpoints++;
	}
    }

  {
    ui_out_emit_table table_emitter (uiout,
				     opts.addressprint ? 6 : 5,
				     nr_printable_breakpoints,
				     "BreakpointTable");

    if (nr_printable_breakpoints > 0)
      annotate_breakpoints_headers ();
    if (nr_printable_breakpoints > 0)
      annotate_field (0);
    uiout->table_header (7, ui_left, "number", "Num"); /* 1 */
    if (nr_printable_breakpoints > 0)
      annotate_field (1);
    uiout->table_header (print_type_col_width, ui_left, "type", "Type"); /* 2 */
    if (nr_printable_breakpoints > 0)
      annotate_field (2);
    uiout->table_header (4, ui_left, "disp", "Disp"); /* 3 */
    if (nr_printable_breakpoints > 0)
      annotate_field (3);
    uiout->table_header (3, ui_left, "enabled", "Enb"); /* 4 */
    if (opts.addressprint)
      {
	if (nr_printable_breakpoints > 0)
	  annotate_field (4);
	if (print_address_bits <= 32)
	  uiout->table_header (10, ui_left, "addr", "Address"); /* 5 */
	else
	  uiout->table_header (18, ui_left, "addr", "Address"); /* 5 */
      }
    if (nr_printable_breakpoints > 0)
      annotate_field (5);
    uiout->table_header (40, ui_noalign, "what", "What"); /* 6 */
    uiout->table_body ();
    if (nr_printable_breakpoints > 0)
      annotate_breakpoints_table ();

    ALL_BREAKPOINTS (b)
      {
	QUIT;
	/* If we have a filter, only list the breakpoints it accepts.  */
	if (filter && !filter (b))
	  continue;

	/* If we have an "args" string, it is a list of breakpoints to 
	   accept.  Skip the others.  */

	if (args != NULL && *args != '\0')
	  {
	    if (allflag)	/* maintenance info breakpoint */
	      {
		if (parse_and_eval_long (args) != b->number)
		  continue;
	      }
	    else		/* all others */
	      {
		if (!number_is_in_list (args, b->number))
		  continue;
	      }
	  }
	/* We only print out user settable breakpoints unless the
	   allflag is set.  */
	if (allflag || user_breakpoint_p (b))
	  print_one_breakpoint (b, &last_loc, allflag);
      }
  }

  if (nr_printable_breakpoints == 0)
    {
      /* If there's a filter, let the caller decide how to report
	 empty list.  */
      if (!filter)
	{
	  if (args == NULL || *args == '\0')
	    uiout->message ("No breakpoints or watchpoints.\n");
	  else
	    uiout->message ("No breakpoint or watchpoint matching '%s'.\n",
			    args);
	}
    }
  else
    {
      if (last_loc && !server_command)
	set_next_address (last_loc->gdbarch, last_loc->address);
    }

  /* FIXME?  Should this be moved up so that it is only called when
     there have been breakpoints? */
  annotate_breakpoints_table_end ();

  return nr_printable_breakpoints;
}

/* Display the value of default-collect in a way that is generally
   compatible with the breakpoint list.  */

static void
default_collect_info (void)
{
  struct ui_out *uiout = current_uiout;

  /* If it has no value (which is frequently the case), say nothing; a
     message like "No default-collect." gets in user's face when it's
     not wanted.  */
  if (!*default_collect)
    return;

  /* The following phrase lines up nicely with per-tracepoint collect
     actions.  */
  uiout->text ("default collect ");
  uiout->field_string ("default-collect", default_collect);
  uiout->text (" \n");
}
  
static void
info_breakpoints_command (const char *args, int from_tty)
{
  breakpoint_1 (args, 0, NULL);

  default_collect_info ();
}

static void
info_watchpoints_command (const char *args, int from_tty)
{
  int num_printed = breakpoint_1 (args, 0, is_watchpoint);
  struct ui_out *uiout = current_uiout;

  if (num_printed == 0)
    {
      if (args == NULL || *args == '\0')
	uiout->message ("No watchpoints.\n");
      else
	uiout->message ("No watchpoint matching '%s'.\n", args);
    }
}

static void
maintenance_info_breakpoints (const char *args, int from_tty)
{
  breakpoint_1 (args, 1, NULL);

  default_collect_info ();
}

static int
breakpoint_has_pc (struct breakpoint *b,
		   struct program_space *pspace,
		   CORE_ADDR pc, struct obj_section *section)
{
  struct bp_location *bl = b->loc;

  for (; bl; bl = bl->next)
    {
      if (bl->pspace == pspace
	  && bl->address == pc
	  && (!overlay_debugging || bl->section == section))
	return 1;	  
    }
  return 0;
}

/* Print a message describing any user-breakpoints set at PC.  This
   concerns with logical breakpoints, so we match program spaces, not
   address spaces.  */

static void
describe_other_breakpoints (struct gdbarch *gdbarch,
			    struct program_space *pspace, CORE_ADDR pc,
			    struct obj_section *section, int thread)
{
  int others = 0;
  struct breakpoint *b;

  ALL_BREAKPOINTS (b)
    others += (user_breakpoint_p (b)
               && breakpoint_has_pc (b, pspace, pc, section));
  if (others > 0)
    {
      if (others == 1)
	printf_filtered (_("Note: breakpoint "));
      else /* if (others == ???) */
	printf_filtered (_("Note: breakpoints "));
      ALL_BREAKPOINTS (b)
	if (user_breakpoint_p (b) && breakpoint_has_pc (b, pspace, pc, section))
	  {
	    others--;
	    printf_filtered ("%d", b->number);
	    if (b->thread == -1 && thread != -1)
	      printf_filtered (" (all threads)");
	    else if (b->thread != -1)
	      printf_filtered (" (thread %d)", b->thread);
	    printf_filtered ("%s%s ",
			     ((b->enable_state == bp_disabled
			       || b->enable_state == bp_call_disabled)
			      ? " (disabled)"
			      : ""),
			     (others > 1) ? "," 
			     : ((others == 1) ? " and" : ""));
	  }
      printf_filtered (_("also set at pc "));
      fputs_filtered (paddress (gdbarch, pc), gdb_stdout);
      printf_filtered (".\n");
    }
}


/* Return true iff it is meaningful to use the address member of
   BPT locations.  For some breakpoint types, the locations' address members
   are irrelevant and it makes no sense to attempt to compare them to other
   addresses (or use them for any other purpose either).

   More specifically, each of the following breakpoint types will
   always have a zero valued location address and we don't want to mark
   breakpoints of any of these types to be a duplicate of an actual
   breakpoint location at address zero:

      bp_watchpoint
      bp_catchpoint

*/

static int
breakpoint_address_is_meaningful (struct breakpoint *bpt)
{
  enum bptype type = bpt->type;

  return (type != bp_watchpoint && type != bp_catchpoint);
}

/* Assuming LOC1 and LOC2's owners are hardware watchpoints, returns
   true if LOC1 and LOC2 represent the same watchpoint location.  */

static int
watchpoint_locations_match (struct bp_location *loc1, 
			    struct bp_location *loc2)
{
  struct watchpoint *w1 = (struct watchpoint *) loc1->owner;
  struct watchpoint *w2 = (struct watchpoint *) loc2->owner;

  /* Both of them must exist.  */
  gdb_assert (w1 != NULL);
  gdb_assert (w2 != NULL);

  /* If the target can evaluate the condition expression in hardware,
     then we we need to insert both watchpoints even if they are at
     the same place.  Otherwise the watchpoint will only trigger when
     the condition of whichever watchpoint was inserted evaluates to
     true, not giving a chance for GDB to check the condition of the
     other watchpoint.  */
  if ((w1->cond_exp
       && target_can_accel_watchpoint_condition (loc1->address, 
						 loc1->length,
						 loc1->watchpoint_type,
						 w1->cond_exp.get ()))
      || (w2->cond_exp
	  && target_can_accel_watchpoint_condition (loc2->address, 
						    loc2->length,
						    loc2->watchpoint_type,
						    w2->cond_exp.get ())))
    return 0;

  /* Note that this checks the owner's type, not the location's.  In
     case the target does not support read watchpoints, but does
     support access watchpoints, we'll have bp_read_watchpoint
     watchpoints with hw_access locations.  Those should be considered
     duplicates of hw_read locations.  The hw_read locations will
     become hw_access locations later.  */
  return (loc1->owner->type == loc2->owner->type
	  && loc1->pspace->aspace == loc2->pspace->aspace
	  && loc1->address == loc2->address
	  && loc1->length == loc2->length);
}

/* See breakpoint.h.  */

int
breakpoint_address_match (const address_space *aspace1, CORE_ADDR addr1,
			  const address_space *aspace2, CORE_ADDR addr2)
{
  return ((gdbarch_has_global_breakpoints (target_gdbarch ())
	   || aspace1 == aspace2)
	  && addr1 == addr2);
}

/* Returns true if {ASPACE2,ADDR2} falls within the range determined by
   {ASPACE1,ADDR1,LEN1}.  In most targets, this can only be true if ASPACE1
   matches ASPACE2.  On targets that have global breakpoints, the address
   space doesn't really matter.  */

static int
breakpoint_address_match_range (const address_space *aspace1,
				CORE_ADDR addr1,
				int len1, const address_space *aspace2,
				CORE_ADDR addr2)
{
  return ((gdbarch_has_global_breakpoints (target_gdbarch ())
	   || aspace1 == aspace2)
	  && addr2 >= addr1 && addr2 < addr1 + len1);
}

/* Returns true if {ASPACE,ADDR} matches the breakpoint BL.  BL may be
   a ranged breakpoint.  In most targets, a match happens only if ASPACE
   matches the breakpoint's address space.  On targets that have global
   breakpoints, the address space doesn't really matter.  */

static int
breakpoint_location_address_match (struct bp_location *bl,
				   const address_space *aspace,
				   CORE_ADDR addr)
{
  return (breakpoint_address_match (bl->pspace->aspace, bl->address,
				    aspace, addr)
	  || (bl->length
	      && breakpoint_address_match_range (bl->pspace->aspace,
						 bl->address, bl->length,
						 aspace, addr)));
}

/* Returns true if the [ADDR,ADDR+LEN) range in ASPACE overlaps
   breakpoint BL.  BL may be a ranged breakpoint.  In most targets, a
   match happens only if ASPACE matches the breakpoint's address
   space.  On targets that have global breakpoints, the address space
   doesn't really matter.  */

static int
breakpoint_location_address_range_overlap (struct bp_location *bl,
					   const address_space *aspace,
					   CORE_ADDR addr, int len)
{
  if (gdbarch_has_global_breakpoints (target_gdbarch ())
      || bl->pspace->aspace == aspace)
    {
      int bl_len = bl->length != 0 ? bl->length : 1;

      if (mem_ranges_overlap (addr, len, bl->address, bl_len))
	return 1;
    }
  return 0;
}

/* If LOC1 and LOC2's owners are not tracepoints, returns false directly.
   Then, if LOC1 and LOC2 represent the same tracepoint location, returns
   true, otherwise returns false.  */

static int
tracepoint_locations_match (struct bp_location *loc1,
			    struct bp_location *loc2)
{
  if (is_tracepoint (loc1->owner) && is_tracepoint (loc2->owner))
    /* Since tracepoint locations are never duplicated with others', tracepoint
       locations at the same address of different tracepoints are regarded as
       different locations.  */
    return (loc1->address == loc2->address && loc1->owner == loc2->owner);
  else
    return 0;
}

/* Assuming LOC1 and LOC2's types' have meaningful target addresses
   (breakpoint_address_is_meaningful), returns true if LOC1 and LOC2
   represent the same location.  */

static int
breakpoint_locations_match (struct bp_location *loc1, 
			    struct bp_location *loc2)
{
  int hw_point1, hw_point2;

  /* Both of them must not be in moribund_locations.  */
  gdb_assert (loc1->owner != NULL);
  gdb_assert (loc2->owner != NULL);

  hw_point1 = is_hardware_watchpoint (loc1->owner);
  hw_point2 = is_hardware_watchpoint (loc2->owner);

  if (hw_point1 != hw_point2)
    return 0;
  else if (hw_point1)
    return watchpoint_locations_match (loc1, loc2);
  else if (is_tracepoint (loc1->owner) || is_tracepoint (loc2->owner))
    return tracepoint_locations_match (loc1, loc2);
  else
    /* We compare bp_location.length in order to cover ranged breakpoints.  */
    return (breakpoint_address_match (loc1->pspace->aspace, loc1->address,
				     loc2->pspace->aspace, loc2->address)
	    && loc1->length == loc2->length);
}

static void
breakpoint_adjustment_warning (CORE_ADDR from_addr, CORE_ADDR to_addr,
                               int bnum, int have_bnum)
{
  /* The longest string possibly returned by hex_string_custom
     is 50 chars.  These must be at least that big for safety.  */
  char astr1[64];
  char astr2[64];

  strcpy (astr1, hex_string_custom ((unsigned long) from_addr, 8));
  strcpy (astr2, hex_string_custom ((unsigned long) to_addr, 8));
  if (have_bnum)
    warning (_("Breakpoint %d address previously adjusted from %s to %s."),
             bnum, astr1, astr2);
  else
    warning (_("Breakpoint address adjusted from %s to %s."), astr1, astr2);
}

/* Adjust a breakpoint's address to account for architectural
   constraints on breakpoint placement.  Return the adjusted address.
   Note: Very few targets require this kind of adjustment.  For most
   targets, this function is simply the identity function.  */

static CORE_ADDR
adjust_breakpoint_address (struct gdbarch *gdbarch,
			   CORE_ADDR bpaddr, enum bptype bptype)
{
  if (bptype == bp_watchpoint
      || bptype == bp_hardware_watchpoint
      || bptype == bp_read_watchpoint
      || bptype == bp_access_watchpoint
      || bptype == bp_catchpoint)
    {
      /* Watchpoints and the various bp_catch_* eventpoints should not
         have their addresses modified.  */
      return bpaddr;
    }
  else if (bptype == bp_single_step)
    {
      /* Single-step breakpoints should not have their addresses
	 modified.  If there's any architectural constrain that
	 applies to this address, then it should have already been
	 taken into account when the breakpoint was created in the
	 first place.  If we didn't do this, stepping through e.g.,
	 Thumb-2 IT blocks would break.  */
      return bpaddr;
    }
  else
    {
      CORE_ADDR adjusted_bpaddr = bpaddr;

      if (gdbarch_adjust_breakpoint_address_p (gdbarch))
	{
	  /* Some targets have architectural constraints on the placement
	     of breakpoint instructions.  Obtain the adjusted address.  */
	  adjusted_bpaddr = gdbarch_adjust_breakpoint_address (gdbarch, bpaddr);
	}

      adjusted_bpaddr = address_significant (gdbarch, adjusted_bpaddr);

      /* An adjusted breakpoint address can significantly alter
         a user's expectations.  Print a warning if an adjustment
	 is required.  */
      if (adjusted_bpaddr != bpaddr)
	breakpoint_adjustment_warning (bpaddr, adjusted_bpaddr, 0, 0);

      return adjusted_bpaddr;
    }
}

bp_location::bp_location (const bp_location_ops *ops, breakpoint *owner)
{
  bp_location *loc = this;

  gdb_assert (ops != NULL);

  loc->ops = ops;
  loc->owner = owner;
  loc->cond_bytecode = NULL;
  loc->shlib_disabled = 0;
  loc->enabled = 1;

  switch (owner->type)
    {
    case bp_breakpoint:
    case bp_single_step:
    case bp_until:
    case bp_finish:
    case bp_longjmp:
    case bp_longjmp_resume:
    case bp_longjmp_call_dummy:
    case bp_exception:
    case bp_exception_resume:
    case bp_step_resume:
    case bp_hp_step_resume:
    case bp_watchpoint_scope:
    case bp_call_dummy:
    case bp_std_terminate:
    case bp_shlib_event:
    case bp_thread_event:
    case bp_overlay_event:
    case bp_jit_event:
    case bp_longjmp_master:
    case bp_std_terminate_master:
    case bp_exception_master:
    case bp_gnu_ifunc_resolver:
    case bp_gnu_ifunc_resolver_return:
    case bp_dprintf:
      loc->loc_type = bp_loc_software_breakpoint;
      mark_breakpoint_location_modified (loc);
      break;
    case bp_hardware_breakpoint:
      loc->loc_type = bp_loc_hardware_breakpoint;
      mark_breakpoint_location_modified (loc);
      break;
    case bp_hardware_watchpoint:
    case bp_read_watchpoint:
    case bp_access_watchpoint:
      loc->loc_type = bp_loc_hardware_watchpoint;
      break;
    case bp_watchpoint:
    case bp_catchpoint:
    case bp_tracepoint:
    case bp_fast_tracepoint:
    case bp_static_tracepoint:
      loc->loc_type = bp_loc_other;
      break;
    default:
      internal_error (__FILE__, __LINE__, _("unknown breakpoint type"));
    }

  loc->refc = 1;
}

/* Allocate a struct bp_location.  */

static struct bp_location *
allocate_bp_location (struct breakpoint *bpt)
{
  return bpt->ops->allocate_location (bpt);
}

static void
free_bp_location (struct bp_location *loc)
{
  loc->ops->dtor (loc);
  delete loc;
}

/* Increment reference count.  */

static void
incref_bp_location (struct bp_location *bl)
{
  ++bl->refc;
}

/* Decrement reference count.  If the reference count reaches 0,
   destroy the bp_location.  Sets *BLP to NULL.  */

static void
decref_bp_location (struct bp_location **blp)
{
  gdb_assert ((*blp)->refc > 0);

  if (--(*blp)->refc == 0)
    free_bp_location (*blp);
  *blp = NULL;
}

/* Add breakpoint B at the end of the global breakpoint chain.  */

static breakpoint *
add_to_breakpoint_chain (std::unique_ptr<breakpoint> &&b)
{
  struct breakpoint *b1;
  struct breakpoint *result = b.get ();

  /* Add this breakpoint to the end of the chain so that a list of
     breakpoints will come out in order of increasing numbers.  */

  b1 = breakpoint_chain;
  if (b1 == 0)
    breakpoint_chain = b.release ();
  else
    {
      while (b1->next)
	b1 = b1->next;
      b1->next = b.release ();
    }

  return result;
}

/* Initializes breakpoint B with type BPTYPE and no locations yet.  */

static void
init_raw_breakpoint_without_location (struct breakpoint *b,
				      struct gdbarch *gdbarch,
				      enum bptype bptype,
				      const struct breakpoint_ops *ops)
{
  gdb_assert (ops != NULL);

  b->ops = ops;
  b->type = bptype;
  b->gdbarch = gdbarch;
  b->language = current_language->la_language;
  b->input_radix = input_radix;
  b->related_breakpoint = b;
}

/* Helper to set_raw_breakpoint below.  Creates a breakpoint
   that has type BPTYPE and has no locations as yet.  */

static struct breakpoint *
set_raw_breakpoint_without_location (struct gdbarch *gdbarch,
				     enum bptype bptype,
				     const struct breakpoint_ops *ops)
{
  std::unique_ptr<breakpoint> b = new_breakpoint_from_type (bptype);

  init_raw_breakpoint_without_location (b.get (), gdbarch, bptype, ops);
  return add_to_breakpoint_chain (std::move (b));
}

/* Initialize loc->function_name.  EXPLICIT_LOC says no indirect function
   resolutions should be made as the user specified the location explicitly
   enough.  */

static void
set_breakpoint_location_function (struct bp_location *loc, int explicit_loc)
{
  gdb_assert (loc->owner != NULL);

  if (loc->owner->type == bp_breakpoint
      || loc->owner->type == bp_hardware_breakpoint
      || is_tracepoint (loc->owner))
    {
      int is_gnu_ifunc;
      const char *function_name;
      CORE_ADDR func_addr;

      find_pc_partial_function_gnu_ifunc (loc->address, &function_name,
					  &func_addr, NULL, &is_gnu_ifunc);

      if (is_gnu_ifunc && !explicit_loc)
	{
	  struct breakpoint *b = loc->owner;

	  gdb_assert (loc->pspace == current_program_space);
	  if (gnu_ifunc_resolve_name (function_name,
				      &loc->requested_address))
	    {
	      /* Recalculate ADDRESS based on new REQUESTED_ADDRESS.  */
	      loc->address = adjust_breakpoint_address (loc->gdbarch,
							loc->requested_address,
							b->type);
	    }
	  else if (b->type == bp_breakpoint && b->loc == loc
	           && loc->next == NULL && b->related_breakpoint == b)
	    {
	      /* Create only the whole new breakpoint of this type but do not
		 mess more complicated breakpoints with multiple locations.  */
	      b->type = bp_gnu_ifunc_resolver;
	      /* Remember the resolver's address for use by the return
	         breakpoint.  */
	      loc->related_address = func_addr;
	    }
	}

      if (function_name)
	loc->function_name = xstrdup (function_name);
    }
}

/* Attempt to determine architecture of location identified by SAL.  */
struct gdbarch *
get_sal_arch (struct symtab_and_line sal)
{
  if (sal.section)
    return get_objfile_arch (sal.section->objfile);
  if (sal.symtab)
    return get_objfile_arch (SYMTAB_OBJFILE (sal.symtab));

  return NULL;
}

/* Low level routine for partially initializing a breakpoint of type
   BPTYPE.  The newly created breakpoint's address, section, source
   file name, and line number are provided by SAL.

   It is expected that the caller will complete the initialization of
   the newly created breakpoint struct as well as output any status
   information regarding the creation of a new breakpoint.  */

static void
init_raw_breakpoint (struct breakpoint *b, struct gdbarch *gdbarch,
		     struct symtab_and_line sal, enum bptype bptype,
		     const struct breakpoint_ops *ops)
{
  init_raw_breakpoint_without_location (b, gdbarch, bptype, ops);

  add_location_to_breakpoint (b, &sal);

  if (bptype != bp_catchpoint)
    gdb_assert (sal.pspace != NULL);

  /* Store the program space that was used to set the breakpoint,
     except for ordinary breakpoints, which are independent of the
     program space.  */
  if (bptype != bp_breakpoint && bptype != bp_hardware_breakpoint)
    b->pspace = sal.pspace;
}

/* set_raw_breakpoint is a low level routine for allocating and
   partially initializing a breakpoint of type BPTYPE.  The newly
   created breakpoint's address, section, source file name, and line
   number are provided by SAL.  The newly created and partially
   initialized breakpoint is added to the breakpoint chain and
   is also returned as the value of this function.

   It is expected that the caller will complete the initialization of
   the newly created breakpoint struct as well as output any status
   information regarding the creation of a new breakpoint.  In
   particular, set_raw_breakpoint does NOT set the breakpoint
   number!  Care should be taken to not allow an error to occur
   prior to completing the initialization of the breakpoint.  If this
   should happen, a bogus breakpoint will be left on the chain.  */

struct breakpoint *
set_raw_breakpoint (struct gdbarch *gdbarch,
		    struct symtab_and_line sal, enum bptype bptype,
		    const struct breakpoint_ops *ops)
{
  std::unique_ptr<breakpoint> b = new_breakpoint_from_type (bptype);

  init_raw_breakpoint (b.get (), gdbarch, sal, bptype, ops);
  return add_to_breakpoint_chain (std::move (b));
}

/* Call this routine when stepping and nexting to enable a breakpoint
   if we do a longjmp() or 'throw' in TP.  FRAME is the frame which
   initiated the operation.  */

void
set_longjmp_breakpoint (struct thread_info *tp, struct frame_id frame)
{
  struct breakpoint *b, *b_tmp;
  int thread = tp->global_num;

  /* To avoid having to rescan all objfile symbols at every step,
     we maintain a list of continually-inserted but always disabled
     longjmp "master" breakpoints.  Here, we simply create momentary
     clones of those and enable them for the requested thread.  */
  ALL_BREAKPOINTS_SAFE (b, b_tmp)
    if (b->pspace == current_program_space
	&& (b->type == bp_longjmp_master
	    || b->type == bp_exception_master))
      {
	enum bptype type = b->type == bp_longjmp_master ? bp_longjmp : bp_exception;
	struct breakpoint *clone;

	/* longjmp_breakpoint_ops ensures INITIATING_FRAME is cleared again
	   after their removal.  */
	clone = momentary_breakpoint_from_master (b, type,
						  &momentary_breakpoint_ops, 1);
	clone->thread = thread;
      }

  tp->initiating_frame = frame;
}

/* Delete all longjmp breakpoints from THREAD.  */
void
delete_longjmp_breakpoint (int thread)
{
  struct breakpoint *b, *b_tmp;

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
    if (b->type == bp_longjmp || b->type == bp_exception)
      {
	if (b->thread == thread)
	  delete_breakpoint (b);
      }
}

void
delete_longjmp_breakpoint_at_next_stop (int thread)
{
  struct breakpoint *b, *b_tmp;

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
    if (b->type == bp_longjmp || b->type == bp_exception)
      {
	if (b->thread == thread)
	  b->disposition = disp_del_at_next_stop;
      }
}

/* Place breakpoints of type bp_longjmp_call_dummy to catch longjmp for
   INFERIOR_PTID thread.  Chain them all by RELATED_BREAKPOINT and return
   pointer to any of them.  Return NULL if this system cannot place longjmp
   breakpoints.  */

struct breakpoint *
set_longjmp_breakpoint_for_call_dummy (void)
{
  struct breakpoint *b, *retval = NULL;

  ALL_BREAKPOINTS (b)
    if (b->pspace == current_program_space && b->type == bp_longjmp_master)
      {
	struct breakpoint *new_b;

	new_b = momentary_breakpoint_from_master (b, bp_longjmp_call_dummy,
						  &momentary_breakpoint_ops,
						  1);
	new_b->thread = ptid_to_global_thread_id (inferior_ptid);

	/* Link NEW_B into the chain of RETVAL breakpoints.  */

	gdb_assert (new_b->related_breakpoint == new_b);
	if (retval == NULL)
	  retval = new_b;
	new_b->related_breakpoint = retval;
	while (retval->related_breakpoint != new_b->related_breakpoint)
	  retval = retval->related_breakpoint;
	retval->related_breakpoint = new_b;
      }

  return retval;
}

/* Verify all existing dummy frames and their associated breakpoints for
   TP.  Remove those which can no longer be found in the current frame
   stack.

   You should call this function only at places where it is safe to currently
   unwind the whole stack.  Failed stack unwind would discard live dummy
   frames.  */

void
check_longjmp_breakpoint_for_call_dummy (struct thread_info *tp)
{
  struct breakpoint *b, *b_tmp;

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
    if (b->type == bp_longjmp_call_dummy && b->thread == tp->global_num)
      {
	struct breakpoint *dummy_b = b->related_breakpoint;

	while (dummy_b != b && dummy_b->type != bp_call_dummy)
	  dummy_b = dummy_b->related_breakpoint;
	if (dummy_b->type != bp_call_dummy
	    || frame_find_by_id (dummy_b->frame_id) != NULL)
	  continue;
	
	dummy_frame_discard (dummy_b->frame_id, tp->ptid);

	while (b->related_breakpoint != b)
	  {
	    if (b_tmp == b->related_breakpoint)
	      b_tmp = b->related_breakpoint->next;
	    delete_breakpoint (b->related_breakpoint);
	  }
	delete_breakpoint (b);
      }
}

void
enable_overlay_breakpoints (void)
{
  struct breakpoint *b;

  ALL_BREAKPOINTS (b)
    if (b->type == bp_overlay_event)
    {
      b->enable_state = bp_enabled;
      update_global_location_list (UGLL_MAY_INSERT);
      overlay_events_enabled = 1;
    }
}

void
disable_overlay_breakpoints (void)
{
  struct breakpoint *b;

  ALL_BREAKPOINTS (b)
    if (b->type == bp_overlay_event)
    {
      b->enable_state = bp_disabled;
      update_global_location_list (UGLL_DONT_INSERT);
      overlay_events_enabled = 0;
    }
}

/* Set an active std::terminate breakpoint for each std::terminate
   master breakpoint.  */
void
set_std_terminate_breakpoint (void)
{
  struct breakpoint *b, *b_tmp;

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
    if (b->pspace == current_program_space
	&& b->type == bp_std_terminate_master)
      {
	momentary_breakpoint_from_master (b, bp_std_terminate,
					  &momentary_breakpoint_ops, 1);
      }
}

/* Delete all the std::terminate breakpoints.  */
void
delete_std_terminate_breakpoint (void)
{
  struct breakpoint *b, *b_tmp;

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
    if (b->type == bp_std_terminate)
      delete_breakpoint (b);
}

struct breakpoint *
create_thread_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address)
{
  struct breakpoint *b;

  b = create_internal_breakpoint (gdbarch, address, bp_thread_event,
				  &internal_breakpoint_ops);

  b->enable_state = bp_enabled;
  /* location has to be used or breakpoint_re_set will delete me.  */
  b->location = new_address_location (b->loc->address, NULL, 0);

  update_global_location_list_nothrow (UGLL_MAY_INSERT);

  return b;
}

struct lang_and_radix
  {
    enum language lang;
    int radix;
  };

/* Create a breakpoint for JIT code registration and unregistration.  */

struct breakpoint *
create_jit_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address)
{
  return create_internal_breakpoint (gdbarch, address, bp_jit_event,
				     &internal_breakpoint_ops);
}

/* Remove JIT code registration and unregistration breakpoint(s).  */

void
remove_jit_event_breakpoints (void)
{
  struct breakpoint *b, *b_tmp;

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
    if (b->type == bp_jit_event
	&& b->loc->pspace == current_program_space)
      delete_breakpoint (b);
}

void
remove_solib_event_breakpoints (void)
{
  struct breakpoint *b, *b_tmp;

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
    if (b->type == bp_shlib_event
	&& b->loc->pspace == current_program_space)
      delete_breakpoint (b);
}

/* See breakpoint.h.  */

void
remove_solib_event_breakpoints_at_next_stop (void)
{
  struct breakpoint *b, *b_tmp;

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
    if (b->type == bp_shlib_event
	&& b->loc->pspace == current_program_space)
      b->disposition = disp_del_at_next_stop;
}

/* Helper for create_solib_event_breakpoint /
   create_and_insert_solib_event_breakpoint.  Allows specifying which
   INSERT_MODE to pass through to update_global_location_list.  */

static struct breakpoint *
create_solib_event_breakpoint_1 (struct gdbarch *gdbarch, CORE_ADDR address,
				 enum ugll_insert_mode insert_mode)
{
  struct breakpoint *b;

  b = create_internal_breakpoint (gdbarch, address, bp_shlib_event,
				  &internal_breakpoint_ops);
  update_global_location_list_nothrow (insert_mode);
  return b;
}

struct breakpoint *
create_solib_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address)
{
  return create_solib_event_breakpoint_1 (gdbarch, address, UGLL_MAY_INSERT);
}

/* See breakpoint.h.  */

struct breakpoint *
create_and_insert_solib_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address)
{
  struct breakpoint *b;

  /* Explicitly tell update_global_location_list to insert
     locations.  */
  b = create_solib_event_breakpoint_1 (gdbarch, address, UGLL_INSERT);
  if (!b->loc->inserted)
    {
      delete_breakpoint (b);
      return NULL;
    }
  return b;
}

/* Disable any breakpoints that are on code in shared libraries.  Only
   apply to enabled breakpoints, disabled ones can just stay disabled.  */

void
disable_breakpoints_in_shlibs (void)
{
  struct bp_location *loc, **locp_tmp;

  ALL_BP_LOCATIONS (loc, locp_tmp)
  {
    /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL.  */
    struct breakpoint *b = loc->owner;

    /* We apply the check to all breakpoints, including disabled for
       those with loc->duplicate set.  This is so that when breakpoint
       becomes enabled, or the duplicate is removed, gdb will try to
       insert all breakpoints.  If we don't set shlib_disabled here,
       we'll try to insert those breakpoints and fail.  */
    if (((b->type == bp_breakpoint)
	 || (b->type == bp_jit_event)
	 || (b->type == bp_hardware_breakpoint)
	 || (is_tracepoint (b)))
	&& loc->pspace == current_program_space
	&& !loc->shlib_disabled
	&& solib_name_from_address (loc->pspace, loc->address)
	)
      {
	loc->shlib_disabled = 1;
      }
  }
}

/* Disable any breakpoints and tracepoints that are in SOLIB upon
   notification of unloaded_shlib.  Only apply to enabled breakpoints,
   disabled ones can just stay disabled.  */

static void
disable_breakpoints_in_unloaded_shlib (struct so_list *solib)
{
  struct bp_location *loc, **locp_tmp;
  int disabled_shlib_breaks = 0;

  ALL_BP_LOCATIONS (loc, locp_tmp)
  {
    /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL.  */
    struct breakpoint *b = loc->owner;

    if (solib->pspace == loc->pspace
	&& !loc->shlib_disabled
	&& (((b->type == bp_breakpoint
	      || b->type == bp_jit_event
	      || b->type == bp_hardware_breakpoint)
	     && (loc->loc_type == bp_loc_hardware_breakpoint
		 || loc->loc_type == bp_loc_software_breakpoint))
	    || is_tracepoint (b))
	&& solib_contains_address_p (solib, loc->address))
      {
	loc->shlib_disabled = 1;
	/* At this point, we cannot rely on remove_breakpoint
	   succeeding so we must mark the breakpoint as not inserted
	   to prevent future errors occurring in remove_breakpoints.  */
	loc->inserted = 0;

	/* This may cause duplicate notifications for the same breakpoint.  */
	gdb::observers::breakpoint_modified.notify (b);

	if (!disabled_shlib_breaks)
	  {
	    target_terminal::ours_for_output ();
	    warning (_("Temporarily disabling breakpoints "
		       "for unloaded shared library \"%s\""),
		     solib->so_name);
	  }
	disabled_shlib_breaks = 1;
      }
  }
}

/* Disable any breakpoints and tracepoints in OBJFILE upon
   notification of free_objfile.  Only apply to enabled breakpoints,
   disabled ones can just stay disabled.  */

static void
disable_breakpoints_in_freed_objfile (struct objfile *objfile)
{
  struct breakpoint *b;

  if (objfile == NULL)
    return;

  /* OBJF_SHARED|OBJF_USERLOADED objfiles are dynamic modules manually
     managed by the user with add-symbol-file/remove-symbol-file.
     Similarly to how breakpoints in shared libraries are handled in
     response to "nosharedlibrary", mark breakpoints in such modules
     shlib_disabled so they end up uninserted on the next global
     location list update.  Shared libraries not loaded by the user
     aren't handled here -- they're already handled in
     disable_breakpoints_in_unloaded_shlib, called by solib.c's
     solib_unloaded observer.  We skip objfiles that are not
     OBJF_SHARED as those aren't considered dynamic objects (e.g. the
     main objfile).  */
  if ((objfile->flags & OBJF_SHARED) == 0
      || (objfile->flags & OBJF_USERLOADED) == 0)
    return;

  ALL_BREAKPOINTS (b)
    {
      struct bp_location *loc;
      int bp_modified = 0;

      if (!is_breakpoint (b) && !is_tracepoint (b))
	continue;

      for (loc = b->loc; loc != NULL; loc = loc->next)
	{
	  CORE_ADDR loc_addr = loc->address;

	  if (loc->loc_type != bp_loc_hardware_breakpoint
	      && loc->loc_type != bp_loc_software_breakpoint)
	    continue;

	  if (loc->shlib_disabled != 0)
	    continue;

	  if (objfile->pspace != loc->pspace)
	    continue;

	  if (loc->loc_type != bp_loc_hardware_breakpoint
	      && loc->loc_type != bp_loc_software_breakpoint)
	    continue;

	  if (is_addr_in_objfile (loc_addr, objfile))
	    {
	      loc->shlib_disabled = 1;
	      /* At this point, we don't know whether the object was
		 unmapped from the inferior or not, so leave the
		 inserted flag alone.  We'll handle failure to
		 uninsert quietly, in case the object was indeed
		 unmapped.  */

	      mark_breakpoint_location_modified (loc);

	      bp_modified = 1;
	    }
	}

      if (bp_modified)
	gdb::observers::breakpoint_modified.notify (b);
    }
}

/* FORK & VFORK catchpoints.  */

/* An instance of this type is used to represent a fork or vfork
   catchpoint.  A breakpoint is really of this type iff its ops pointer points
   to CATCH_FORK_BREAKPOINT_OPS.  */

struct fork_catchpoint : public breakpoint
{
  /* Process id of a child process whose forking triggered this
     catchpoint.  This field is only valid immediately after this
     catchpoint has triggered.  */
  ptid_t forked_inferior_pid;
};

/* Implement the "insert" breakpoint_ops method for fork
   catchpoints.  */

static int
insert_catch_fork (struct bp_location *bl)
{
  return target_insert_fork_catchpoint (ptid_get_pid (inferior_ptid));
}

/* Implement the "remove" breakpoint_ops method for fork
   catchpoints.  */

static int
remove_catch_fork (struct bp_location *bl, enum remove_bp_reason reason)
{
  return target_remove_fork_catchpoint (ptid_get_pid (inferior_ptid));
}

/* Implement the "breakpoint_hit" breakpoint_ops method for fork
   catchpoints.  */

static int
breakpoint_hit_catch_fork (const struct bp_location *bl,
			   const address_space *aspace, CORE_ADDR bp_addr,
			   const struct target_waitstatus *ws)
{
  struct fork_catchpoint *c = (struct fork_catchpoint *) bl->owner;

  if (ws->kind != TARGET_WAITKIND_FORKED)
    return 0;

  c->forked_inferior_pid = ws->value.related_pid;
  return 1;
}

/* Implement the "print_it" breakpoint_ops method for fork
   catchpoints.  */

static enum print_stop_action
print_it_catch_fork (bpstat bs)
{
  struct ui_out *uiout = current_uiout;
  struct breakpoint *b = bs->breakpoint_at;
  struct fork_catchpoint *c = (struct fork_catchpoint *) bs->breakpoint_at;

  annotate_catchpoint (b->number);
  maybe_print_thread_hit_breakpoint (uiout);
  if (b->disposition == disp_del)
    uiout->text ("Temporary catchpoint ");
  else
    uiout->text ("Catchpoint ");
  if (uiout->is_mi_like_p ())
    {
      uiout->field_string ("reason", async_reason_lookup (EXEC_ASYNC_FORK));
      uiout->field_string ("disp", bpdisp_text (b->disposition));
    }
  uiout->field_int ("bkptno", b->number);
  uiout->text (" (forked process ");
  uiout->field_int ("newpid", ptid_get_pid (c->forked_inferior_pid));
  uiout->text ("), ");
  return PRINT_SRC_AND_LOC;
}

/* Implement the "print_one" breakpoint_ops method for fork
   catchpoints.  */

static void
print_one_catch_fork (struct breakpoint *b, struct bp_location **last_loc)
{
  struct fork_catchpoint *c = (struct fork_catchpoint *) b;
  struct value_print_options opts;
  struct ui_out *uiout = current_uiout;

  get_user_print_options (&opts);

  /* Field 4, the address, is omitted (which makes the columns not
     line up too nicely with the headers, but the effect is relatively
     readable).  */
  if (opts.addressprint)
    uiout->field_skip ("addr");
  annotate_field (5);
  uiout->text ("fork");
  if (!ptid_equal (c->forked_inferior_pid, null_ptid))
    {
      uiout->text (", process ");
      uiout->field_int ("what", ptid_get_pid (c->forked_inferior_pid));
      uiout->spaces (1);
    }

  if (uiout->is_mi_like_p ())
    uiout->field_string ("catch-type", "fork");
}

/* Implement the "print_mention" breakpoint_ops method for fork
   catchpoints.  */

static void
print_mention_catch_fork (struct breakpoint *b)
{
  printf_filtered (_("Catchpoint %d (fork)"), b->number);
}

/* Implement the "print_recreate" breakpoint_ops method for fork
   catchpoints.  */

static void
print_recreate_catch_fork (struct breakpoint *b, struct ui_file *fp)
{
  fprintf_unfiltered (fp, "catch fork");
  print_recreate_thread (b, fp);
}

/* The breakpoint_ops structure to be used in fork catchpoints.  */

static struct breakpoint_ops catch_fork_breakpoint_ops;

/* Implement the "insert" breakpoint_ops method for vfork
   catchpoints.  */

static int
insert_catch_vfork (struct bp_location *bl)
{
  return target_insert_vfork_catchpoint (ptid_get_pid (inferior_ptid));
}

/* Implement the "remove" breakpoint_ops method for vfork
   catchpoints.  */

static int
remove_catch_vfork (struct bp_location *bl, enum remove_bp_reason reason)
{
  return target_remove_vfork_catchpoint (ptid_get_pid (inferior_ptid));
}

/* Implement the "breakpoint_hit" breakpoint_ops method for vfork
   catchpoints.  */

static int
breakpoint_hit_catch_vfork (const struct bp_location *bl,
			    const address_space *aspace, CORE_ADDR bp_addr,
			    const struct target_waitstatus *ws)
{
  struct fork_catchpoint *c = (struct fork_catchpoint *) bl->owner;

  if (ws->kind != TARGET_WAITKIND_VFORKED)
    return 0;

  c->forked_inferior_pid = ws->value.related_pid;
  return 1;
}

/* Implement the "print_it" breakpoint_ops method for vfork
   catchpoints.  */

static enum print_stop_action
print_it_catch_vfork (bpstat bs)
{
  struct ui_out *uiout = current_uiout;
  struct breakpoint *b = bs->breakpoint_at;
  struct fork_catchpoint *c = (struct fork_catchpoint *) b;

  annotate_catchpoint (b->number);
  maybe_print_thread_hit_breakpoint (uiout);
  if (b->disposition == disp_del)
    uiout->text ("Temporary catchpoint ");
  else
    uiout->text ("Catchpoint ");
  if (uiout->is_mi_like_p ())
    {
      uiout->field_string ("reason", async_reason_lookup (EXEC_ASYNC_VFORK));
      uiout->field_string ("disp", bpdisp_text (b->disposition));
    }
  uiout->field_int ("bkptno", b->number);
  uiout->text (" (vforked process ");
  uiout->field_int ("newpid", ptid_get_pid (c->forked_inferior_pid));
  uiout->text ("), ");
  return PRINT_SRC_AND_LOC;
}

/* Implement the "print_one" breakpoint_ops method for vfork
   catchpoints.  */

static void
print_one_catch_vfork (struct breakpoint *b, struct bp_location **last_loc)
{
  struct fork_catchpoint *c = (struct fork_catchpoint *) b;
  struct value_print_options opts;
  struct ui_out *uiout = current_uiout;

  get_user_print_options (&opts);
  /* Field 4, the address, is omitted (which makes the columns not
     line up too nicely with the headers, but the effect is relatively
     readable).  */
  if (opts.addressprint)
    uiout->field_skip ("addr");
  annotate_field (5);
  uiout->text ("vfork");
  if (!ptid_equal (c->forked_inferior_pid, null_ptid))
    {
      uiout->text (", process ");
      uiout->field_int ("what", ptid_get_pid (c->forked_inferior_pid));
      uiout->spaces (1);
    }

  if (uiout->is_mi_like_p ())
    uiout->field_string ("catch-type", "vfork");
}

/* Implement the "print_mention" breakpoint_ops method for vfork
   catchpoints.  */

static void
print_mention_catch_vfork (struct breakpoint *b)
{
  printf_filtered (_("Catchpoint %d (vfork)"), b->number);
}

/* Implement the "print_recreate" breakpoint_ops method for vfork
   catchpoints.  */

static void
print_recreate_catch_vfork (struct breakpoint *b, struct ui_file *fp)
{
  fprintf_unfiltered (fp, "catch vfork");
  print_recreate_thread (b, fp);
}

/* The breakpoint_ops structure to be used in vfork catchpoints.  */

static struct breakpoint_ops catch_vfork_breakpoint_ops;

/* An instance of this type is used to represent an solib catchpoint.
   A breakpoint is really of this type iff its ops pointer points to
   CATCH_SOLIB_BREAKPOINT_OPS.  */

struct solib_catchpoint : public breakpoint
{
  ~solib_catchpoint () override;

  /* True for "catch load", false for "catch unload".  */
  unsigned char is_load;

  /* Regular expression to match, if any.  COMPILED is only valid when
     REGEX is non-NULL.  */
  char *regex;
  std::unique_ptr<compiled_regex> compiled;
};

solib_catchpoint::~solib_catchpoint ()
{
  xfree (this->regex);
}

static int
insert_catch_solib (struct bp_location *ignore)
{
  return 0;
}

static int
remove_catch_solib (struct bp_location *ignore, enum remove_bp_reason reason)
{
  return 0;
}

static int
breakpoint_hit_catch_solib (const struct bp_location *bl,
			    const address_space *aspace,
			    CORE_ADDR bp_addr,
			    const struct target_waitstatus *ws)
{
  struct solib_catchpoint *self = (struct solib_catchpoint *) bl->owner;
  struct breakpoint *other;

  if (ws->kind == TARGET_WAITKIND_LOADED)
    return 1;

  ALL_BREAKPOINTS (other)
  {
    struct bp_location *other_bl;

    if (other == bl->owner)
      continue;

    if (other->type != bp_shlib_event)
      continue;

    if (self->pspace != NULL && other->pspace != self->pspace)
      continue;

    for (other_bl = other->loc; other_bl != NULL; other_bl = other_bl->next)
      {
	if (other->ops->breakpoint_hit (other_bl, aspace, bp_addr, ws))
	  return 1;
      }
  }

  return 0;
}

static void
check_status_catch_solib (struct bpstats *bs)
{
  struct solib_catchpoint *self
    = (struct solib_catchpoint *) bs->breakpoint_at;

  if (self->is_load)
    {
      struct so_list *iter;

      for (int ix = 0;
	   VEC_iterate (so_list_ptr, current_program_space->added_solibs,
			ix, iter);
	   ++ix)
	{
	  if (!self->regex
	      || self->compiled->exec (iter->so_name, 0, NULL, 0) == 0)
	    return;
	}
    }
  else
    {
      for (const std::string &iter : current_program_space->deleted_solibs)
	{
	  if (!self->regex
	      || self->compiled->exec (iter.c_str (), 0, NULL, 0) == 0)
	    return;
	}
    }

  bs->stop = 0;
  bs->print_it = print_it_noop;
}

static enum print_stop_action
print_it_catch_solib (bpstat bs)
{
  struct breakpoint *b = bs->breakpoint_at;
  struct ui_out *uiout = current_uiout;

  annotate_catchpoint (b->number);
  maybe_print_thread_hit_breakpoint (uiout);
  if (b->disposition == disp_del)
    uiout->text ("Temporary catchpoint ");
  else
    uiout->text ("Catchpoint ");
  uiout->field_int ("bkptno", b->number);
  uiout->text ("\n");
  if (uiout->is_mi_like_p ())
    uiout->field_string ("disp", bpdisp_text (b->disposition));
  print_solib_event (1);
  return PRINT_SRC_AND_LOC;
}

static void
print_one_catch_solib (struct breakpoint *b, struct bp_location **locs)
{
  struct solib_catchpoint *self = (struct solib_catchpoint *) b;
  struct value_print_options opts;
  struct ui_out *uiout = current_uiout;
  char *msg;

  get_user_print_options (&opts);
  /* Field 4, the address, is omitted (which makes the columns not
     line up too nicely with the headers, but the effect is relatively
     readable).  */
  if (opts.addressprint)
    {
      annotate_field (4);
      uiout->field_skip ("addr");
    }

  annotate_field (5);
  if (self->is_load)
    {
      if (self->regex)
	msg = xstrprintf (_("load of library matching %s"), self->regex);
      else
	msg = xstrdup (_("load of library"));
    }
  else
    {
      if (self->regex)
	msg = xstrprintf (_("unload of library matching %s"), self->regex);
      else
	msg = xstrdup (_("unload of library"));
    }
  uiout->field_string ("what", msg);
  xfree (msg);

  if (uiout->is_mi_like_p ())
    uiout->field_string ("catch-type", self->is_load ? "load" : "unload");
}

static void
print_mention_catch_solib (struct breakpoint *b)
{
  struct solib_catchpoint *self = (struct solib_catchpoint *) b;

  printf_filtered (_("Catchpoint %d (%s)"), b->number,
		   self->is_load ? "load" : "unload");
}

static void
print_recreate_catch_solib (struct breakpoint *b, struct ui_file *fp)
{
  struct solib_catchpoint *self = (struct solib_catchpoint *) b;

  fprintf_unfiltered (fp, "%s %s",
		      b->disposition == disp_del ? "tcatch" : "catch",
		      self->is_load ? "load" : "unload");
  if (self->regex)
    fprintf_unfiltered (fp, " %s", self->regex);
  fprintf_unfiltered (fp, "\n");
}

static struct breakpoint_ops catch_solib_breakpoint_ops;

/* Shared helper function (MI and CLI) for creating and installing
   a shared object event catchpoint.  If IS_LOAD is non-zero then
   the events to be caught are load events, otherwise they are
   unload events.  If IS_TEMP is non-zero the catchpoint is a
   temporary one.  If ENABLED is non-zero the catchpoint is
   created in an enabled state.  */

void
add_solib_catchpoint (const char *arg, int is_load, int is_temp, int enabled)
{
  struct gdbarch *gdbarch = get_current_arch ();

  if (!arg)
    arg = "";
  arg = skip_spaces (arg);

  std::unique_ptr<solib_catchpoint> c (new solib_catchpoint ());

  if (*arg != '\0')
    {
      c->compiled.reset (new compiled_regex (arg, REG_NOSUB,
					     _("Invalid regexp")));
      c->regex = xstrdup (arg);
    }

  c->is_load = is_load;
  init_catchpoint (c.get (), gdbarch, is_temp, NULL,
		   &catch_solib_breakpoint_ops);

  c->enable_state = enabled ? bp_enabled : bp_disabled;

  install_breakpoint (0, std::move (c), 1);
}

/* A helper function that does all the work for "catch load" and
   "catch unload".  */

static void
catch_load_or_unload (const char *arg, int from_tty, int is_load,
		      struct cmd_list_element *command)
{
  int tempflag;
  const int enabled = 1;

  tempflag = get_cmd_context (command) == CATCH_TEMPORARY;

  add_solib_catchpoint (arg, is_load, tempflag, enabled);
}

static void
catch_load_command_1 (const char *arg, int from_tty,
		      struct cmd_list_element *command)
{
  catch_load_or_unload (arg, from_tty, 1, command);
}

static void
catch_unload_command_1 (const char *arg, int from_tty,
			struct cmd_list_element *command)
{
  catch_load_or_unload (arg, from_tty, 0, command);
}

/* Initialize a new breakpoint of the bp_catchpoint kind.  If TEMPFLAG
   is non-zero, then make the breakpoint temporary.  If COND_STRING is
   not NULL, then store it in the breakpoint.  OPS, if not NULL, is
   the breakpoint_ops structure associated to the catchpoint.  */

void
init_catchpoint (struct breakpoint *b,
		 struct gdbarch *gdbarch, int tempflag,
		 const char *cond_string,
		 const struct breakpoint_ops *ops)
{
  symtab_and_line sal;
  sal.pspace = current_program_space;

  init_raw_breakpoint (b, gdbarch, sal, bp_catchpoint, ops);

  b->cond_string = (cond_string == NULL) ? NULL : xstrdup (cond_string);
  b->disposition = tempflag ? disp_del : disp_donttouch;
}

void
install_breakpoint (int internal, std::unique_ptr<breakpoint> &&arg, int update_gll)
{
  breakpoint *b = add_to_breakpoint_chain (std::move (arg));
  set_breakpoint_number (internal, b);
  if (is_tracepoint (b))
    set_tracepoint_count (breakpoint_count);
  if (!internal)
    mention (b);
  gdb::observers::breakpoint_created.notify (b);

  if (update_gll)
    update_global_location_list (UGLL_MAY_INSERT);
}

static void
create_fork_vfork_event_catchpoint (struct gdbarch *gdbarch,
				    int tempflag, const char *cond_string,
                                    const struct breakpoint_ops *ops)
{
  std::unique_ptr<fork_catchpoint> c (new fork_catchpoint ());

  init_catchpoint (c.get (), gdbarch, tempflag, cond_string, ops);

  c->forked_inferior_pid = null_ptid;

  install_breakpoint (0, std::move (c), 1);
}

/* Exec catchpoints.  */

/* An instance of this type is used to represent an exec catchpoint.
   A breakpoint is really of this type iff its ops pointer points to
   CATCH_EXEC_BREAKPOINT_OPS.  */

struct exec_catchpoint : public breakpoint
{
  ~exec_catchpoint () override;

  /* Filename of a program whose exec triggered this catchpoint.
     This field is only valid immediately after this catchpoint has
     triggered.  */
  char *exec_pathname;
};

/* Exec catchpoint destructor.  */

exec_catchpoint::~exec_catchpoint ()
{
  xfree (this->exec_pathname);
}

static int
insert_catch_exec (struct bp_location *bl)
{
  return target_insert_exec_catchpoint (ptid_get_pid (inferior_ptid));
}

static int
remove_catch_exec (struct bp_location *bl, enum remove_bp_reason reason)
{
  return target_remove_exec_catchpoint (ptid_get_pid (inferior_ptid));
}

static int
breakpoint_hit_catch_exec (const struct bp_location *bl,
			   const address_space *aspace, CORE_ADDR bp_addr,
			   const struct target_waitstatus *ws)
{
  struct exec_catchpoint *c = (struct exec_catchpoint *) bl->owner;

  if (ws->kind != TARGET_WAITKIND_EXECD)
    return 0;

  c->exec_pathname = xstrdup (ws->value.execd_pathname);
  return 1;
}

static enum print_stop_action
print_it_catch_exec (bpstat bs)
{
  struct ui_out *uiout = current_uiout;
  struct breakpoint *b = bs->breakpoint_at;
  struct exec_catchpoint *c = (struct exec_catchpoint *) b;

  annotate_catchpoint (b->number);
  maybe_print_thread_hit_breakpoint (uiout);
  if (b->disposition == disp_del)
    uiout->text ("Temporary catchpoint ");
  else
    uiout->text ("Catchpoint ");
  if (uiout->is_mi_like_p ())
    {
      uiout->field_string ("reason", async_reason_lookup (EXEC_ASYNC_EXEC));
      uiout->field_string ("disp", bpdisp_text (b->disposition));
    }
  uiout->field_int ("bkptno", b->number);
  uiout->text (" (exec'd ");
  uiout->field_string ("new-exec", c->exec_pathname);
  uiout->text ("), ");

  return PRINT_SRC_AND_LOC;
}

static void
print_one_catch_exec (struct breakpoint *b, struct bp_location **last_loc)
{
  struct exec_catchpoint *c = (struct exec_catchpoint *) b;
  struct value_print_options opts;
  struct ui_out *uiout = current_uiout;

  get_user_print_options (&opts);

  /* Field 4, the address, is omitted (which makes the columns
     not line up too nicely with the headers, but the effect
     is relatively readable).  */
  if (opts.addressprint)
    uiout->field_skip ("addr");
  annotate_field (5);
  uiout->text ("exec");
  if (c->exec_pathname != NULL)
    {
      uiout->text (", program \"");
      uiout->field_string ("what", c->exec_pathname);
      uiout->text ("\" ");
    }

  if (uiout->is_mi_like_p ())
    uiout->field_string ("catch-type", "exec");
}

static void
print_mention_catch_exec (struct breakpoint *b)
{
  printf_filtered (_("Catchpoint %d (exec)"), b->number);
}

/* Implement the "print_recreate" breakpoint_ops method for exec
   catchpoints.  */

static void
print_recreate_catch_exec (struct breakpoint *b, struct ui_file *fp)
{
  fprintf_unfiltered (fp, "catch exec");
  print_recreate_thread (b, fp);
}

static struct breakpoint_ops catch_exec_breakpoint_ops;

static int
hw_breakpoint_used_count (void)
{
  int i = 0;
  struct breakpoint *b;
  struct bp_location *bl;

  ALL_BREAKPOINTS (b)
  {
    if (b->type == bp_hardware_breakpoint && breakpoint_enabled (b))
      for (bl = b->loc; bl; bl = bl->next)
	{
	  /* Special types of hardware breakpoints may use more than
	     one register.  */
	  i += b->ops->resources_needed (bl);
	}
  }

  return i;
}

/* Returns the resources B would use if it were a hardware
   watchpoint.  */

static int
hw_watchpoint_use_count (struct breakpoint *b)
{
  int i = 0;
  struct bp_location *bl;

  if (!breakpoint_enabled (b))
    return 0;

  for (bl = b->loc; bl; bl = bl->next)
    {
      /* Special types of hardware watchpoints may use more than
	 one register.  */
      i += b->ops->resources_needed (bl);
    }

  return i;
}

/* Returns the sum the used resources of all hardware watchpoints of
   type TYPE in the breakpoints list.  Also returns in OTHER_TYPE_USED
   the sum of the used resources of all hardware watchpoints of other
   types _not_ TYPE.  */

static int
hw_watchpoint_used_count_others (struct breakpoint *except,
				 enum bptype type, int *other_type_used)
{
  int i = 0;
  struct breakpoint *b;

  *other_type_used = 0;
  ALL_BREAKPOINTS (b)
    {
      if (b == except)
	continue;
      if (!breakpoint_enabled (b))
	continue;

      if (b->type == type)
	i += hw_watchpoint_use_count (b);
      else if (is_hardware_watchpoint (b))
	*other_type_used = 1;
    }

  return i;
}

void
disable_watchpoints_before_interactive_call_start (void)
{
  struct breakpoint *b;

  ALL_BREAKPOINTS (b)
  {
    if (is_watchpoint (b) && breakpoint_enabled (b))
      {
	b->enable_state = bp_call_disabled;
	update_global_location_list (UGLL_DONT_INSERT);
      }
  }
}

void
enable_watchpoints_after_interactive_call_stop (void)
{
  struct breakpoint *b;

  ALL_BREAKPOINTS (b)
  {
    if (is_watchpoint (b) && b->enable_state == bp_call_disabled)
      {
	b->enable_state = bp_enabled;
	update_global_location_list (UGLL_MAY_INSERT);
      }
  }
}

void
disable_breakpoints_before_startup (void)
{
  current_program_space->executing_startup = 1;
  update_global_location_list (UGLL_DONT_INSERT);
}

void
enable_breakpoints_after_startup (void)
{
  current_program_space->executing_startup = 0;
  breakpoint_re_set ();
}

/* Create a new single-step breakpoint for thread THREAD, with no
   locations.  */

static struct breakpoint *
new_single_step_breakpoint (int thread, struct gdbarch *gdbarch)
{
  std::unique_ptr<breakpoint> b (new breakpoint ());

  init_raw_breakpoint_without_location (b.get (), gdbarch, bp_single_step,
					&momentary_breakpoint_ops);

  b->disposition = disp_donttouch;
  b->frame_id = null_frame_id;

  b->thread = thread;
  gdb_assert (b->thread != 0);

  return add_to_breakpoint_chain (std::move (b));
}

/* Set a momentary breakpoint of type TYPE at address specified by
   SAL.  If FRAME_ID is valid, the breakpoint is restricted to that
   frame.  */

breakpoint_up
set_momentary_breakpoint (struct gdbarch *gdbarch, struct symtab_and_line sal,
			  struct frame_id frame_id, enum bptype type)
{
  struct breakpoint *b;

  /* If FRAME_ID is valid, it should be a real frame, not an inlined or
     tail-called one.  */
  gdb_assert (!frame_id_artificial_p (frame_id));

  b = set_raw_breakpoint (gdbarch, sal, type, &momentary_breakpoint_ops);
  b->enable_state = bp_enabled;
  b->disposition = disp_donttouch;
  b->frame_id = frame_id;

  /* If we're debugging a multi-threaded program, then we want
     momentary breakpoints to be active in only a single thread of
     control.  */
  if (in_thread_list (inferior_ptid))
    b->thread = ptid_to_global_thread_id (inferior_ptid);

  update_global_location_list_nothrow (UGLL_MAY_INSERT);

  return breakpoint_up (b);
}

/* Make a momentary breakpoint based on the master breakpoint ORIG.
   The new breakpoint will have type TYPE, use OPS as its
   breakpoint_ops, and will set enabled to LOC_ENABLED.  */

static struct breakpoint *
momentary_breakpoint_from_master (struct breakpoint *orig,
				  enum bptype type,
				  const struct breakpoint_ops *ops,
				  int loc_enabled)
{
  struct breakpoint *copy;

  copy = set_raw_breakpoint_without_location (orig->gdbarch, type, ops);
  copy->loc = allocate_bp_location (copy);
  set_breakpoint_location_function (copy->loc, 1);

  copy->loc->gdbarch = orig->loc->gdbarch;
  copy->loc->requested_address = orig->loc->requested_address;
  copy->loc->address = orig->loc->address;
  copy->loc->section = orig->loc->section;
  copy->loc->pspace = orig->loc->pspace;
  copy->loc->probe = orig->loc->probe;
  copy->loc->line_number = orig->loc->line_number;
  copy->loc->symtab = orig->loc->symtab;
  copy->loc->enabled = loc_enabled;
  copy->frame_id = orig->frame_id;
  copy->thread = orig->thread;
  copy->pspace = orig->pspace;

  copy->enable_state = bp_enabled;
  copy->disposition = disp_donttouch;
  copy->number = internal_breakpoint_number--;

  update_global_location_list_nothrow (UGLL_DONT_INSERT);
  return copy;
}

/* Make a deep copy of momentary breakpoint ORIG.  Returns NULL if
   ORIG is NULL.  */

struct breakpoint *
clone_momentary_breakpoint (struct breakpoint *orig)
{
  /* If there's nothing to clone, then return nothing.  */
  if (orig == NULL)
    return NULL;

  return momentary_breakpoint_from_master (orig, orig->type, orig->ops, 0);
}

breakpoint_up
set_momentary_breakpoint_at_pc (struct gdbarch *gdbarch, CORE_ADDR pc,
				enum bptype type)
{
  struct symtab_and_line sal;

  sal = find_pc_line (pc, 0);
  sal.pc = pc;
  sal.section = find_pc_overlay (pc);
  sal.explicit_pc = 1;

  return set_momentary_breakpoint (gdbarch, sal, null_frame_id, type);
}


/* Tell the user we have just set a breakpoint B.  */

static void
mention (struct breakpoint *b)
{
  b->ops->print_mention (b);
  if (current_uiout->is_mi_like_p ())
    return;
  printf_filtered ("\n");
}


static int bp_loc_is_permanent (struct bp_location *loc);

static struct bp_location *
add_location_to_breakpoint (struct breakpoint *b,
			    const struct symtab_and_line *sal)
{
  struct bp_location *loc, **tmp;
  CORE_ADDR adjusted_address;
  struct gdbarch *loc_gdbarch = get_sal_arch (*sal);

  if (loc_gdbarch == NULL)
    loc_gdbarch = b->gdbarch;

  /* Adjust the breakpoint's address prior to allocating a location.
     Once we call allocate_bp_location(), that mostly uninitialized
     location will be placed on the location chain.  Adjustment of the
     breakpoint may cause target_read_memory() to be called and we do
     not want its scan of the location chain to find a breakpoint and
     location that's only been partially initialized.  */
  adjusted_address = adjust_breakpoint_address (loc_gdbarch,
						sal->pc, b->type);

  /* Sort the locations by their ADDRESS.  */
  loc = allocate_bp_location (b);
  for (tmp = &(b->loc); *tmp != NULL && (*tmp)->address <= adjusted_address;
       tmp = &((*tmp)->next))
    ;
  loc->next = *tmp;
  *tmp = loc;

  loc->requested_address = sal->pc;
  loc->address = adjusted_address;
  loc->pspace = sal->pspace;
  loc->probe.prob = sal->prob;
  loc->probe.objfile = sal->objfile;
  gdb_assert (loc->pspace != NULL);
  loc->section = sal->section;
  loc->gdbarch = loc_gdbarch;
  loc->line_number = sal->line;
  loc->symtab = sal->symtab;
  loc->symbol = sal->symbol;

  set_breakpoint_location_function (loc,
				    sal->explicit_pc || sal->explicit_line);

  /* While by definition, permanent breakpoints are already present in the
     code, we don't mark the location as inserted.  Normally one would expect
     that GDB could rely on that breakpoint instruction to stop the program,
     thus removing the need to insert its own breakpoint, except that executing
     the breakpoint instruction can kill the target instead of reporting a
     SIGTRAP.  E.g., on SPARC, when interrupts are disabled, executing the
     instruction resets the CPU, so QEMU 2.0.0 for SPARC correspondingly dies
     with "Trap 0x02 while interrupts disabled, Error state".  Letting the
     breakpoint be inserted normally results in QEMU knowing about the GDB
     breakpoint, and thus trap before the breakpoint instruction is executed.
     (If GDB later needs to continue execution past the permanent breakpoint,
     it manually increments the PC, thus avoiding executing the breakpoint
     instruction.)  */
  if (bp_loc_is_permanent (loc))
    loc->permanent = 1;

  return loc;
}


/* See breakpoint.h.  */

int
program_breakpoint_here_p (struct gdbarch *gdbarch, CORE_ADDR address)
{
  int len;
  CORE_ADDR addr;
  const gdb_byte *bpoint;
  gdb_byte *target_mem;

  addr = address;
  bpoint = gdbarch_breakpoint_from_pc (gdbarch, &addr, &len);

  /* Software breakpoints unsupported?  */
  if (bpoint == NULL)
    return 0;

  target_mem = (gdb_byte *) alloca (len);

  /* Enable the automatic memory restoration from breakpoints while
     we read the memory.  Otherwise we could say about our temporary
     breakpoints they are permanent.  */
  scoped_restore restore_memory
    = make_scoped_restore_show_memory_breakpoints (0);

  if (target_read_memory (address, target_mem, len) == 0
      && memcmp (target_mem, bpoint, len) == 0)
    return 1;

  return 0;
}

/* Return 1 if LOC is pointing to a permanent breakpoint,
   return 0 otherwise.  */

static int
bp_loc_is_permanent (struct bp_location *loc)
{
  gdb_assert (loc != NULL);

  /* If we have a catchpoint or a watchpoint, just return 0.  We should not
     attempt to read from the addresses the locations of these breakpoint types
     point to.  program_breakpoint_here_p, below, will attempt to read
     memory.  */
  if (!breakpoint_address_is_meaningful (loc->owner))
    return 0;

  scoped_restore_current_pspace_and_thread restore_pspace_thread;
  switch_to_program_space_and_thread (loc->pspace);
  return program_breakpoint_here_p (loc->gdbarch, loc->address);
}

/* Build a command list for the dprintf corresponding to the current
   settings of the dprintf style options.  */

static void
update_dprintf_command_list (struct breakpoint *b)
{
  char *dprintf_args = b->extra_string;
  char *printf_line = NULL;

  if (!dprintf_args)
    return;

  dprintf_args = skip_spaces (dprintf_args);

  /* Allow a comma, as it may have terminated a location, but don't
     insist on it.  */
  if (*dprintf_args == ',')
    ++dprintf_args;
  dprintf_args = skip_spaces (dprintf_args);

  if (*dprintf_args != '"')
    error (_("Bad format string, missing '\"'."));

  if (strcmp (dprintf_style, dprintf_style_gdb) == 0)
    printf_line = xstrprintf ("printf %s", dprintf_args);
  else if (strcmp (dprintf_style, dprintf_style_call) == 0)
    {
      if (!dprintf_function)
	error (_("No function supplied for dprintf call"));

      if (dprintf_channel && strlen (dprintf_channel) > 0)
	printf_line = xstrprintf ("call (void) %s (%s,%s)",
				  dprintf_function,
				  dprintf_channel,
				  dprintf_args);
      else
	printf_line = xstrprintf ("call (void) %s (%s)",
				  dprintf_function,
				  dprintf_args);
    }
  else if (strcmp (dprintf_style, dprintf_style_agent) == 0)
    {
      if (target_can_run_breakpoint_commands ())
	printf_line = xstrprintf ("agent-printf %s", dprintf_args);
      else
	{
	  warning (_("Target cannot run dprintf commands, falling back to GDB printf"));
	  printf_line = xstrprintf ("printf %s", dprintf_args);
	}
    }
  else
    internal_error (__FILE__, __LINE__,
		    _("Invalid dprintf style."));

  gdb_assert (printf_line != NULL);
  /* Manufacture a printf sequence.  */
  {
    struct command_line *printf_cmd_line = XNEW (struct command_line);

    printf_cmd_line->control_type = simple_control;
    printf_cmd_line->body_count = 0;
    printf_cmd_line->body_list = NULL;
    printf_cmd_line->next = NULL;
    printf_cmd_line->line = printf_line;

    breakpoint_set_commands (b, command_line_up (printf_cmd_line));
  }
}

/* Update all dprintf commands, making their command lists reflect
   current style settings.  */

static void
update_dprintf_commands (const char *args, int from_tty,
			 struct cmd_list_element *c)
{
  struct breakpoint *b;

  ALL_BREAKPOINTS (b)
    {
      if (b->type == bp_dprintf)
	update_dprintf_command_list (b);
    }
}

/* Create a breakpoint with SAL as location.  Use LOCATION
   as a description of the location, and COND_STRING
   as condition expression.  If LOCATION is NULL then create an
   "address location" from the address in the SAL.  */

static void
init_breakpoint_sal (struct breakpoint *b, struct gdbarch *gdbarch,
		     gdb::array_view<const symtab_and_line> sals,
		     event_location_up &&location,
		     gdb::unique_xmalloc_ptr<char> filter,
		     gdb::unique_xmalloc_ptr<char> cond_string,
		     gdb::unique_xmalloc_ptr<char> extra_string,
		     enum bptype type, enum bpdisp disposition,
		     int thread, int task, int ignore_count,
		     const struct breakpoint_ops *ops, int from_tty,
		     int enabled, int internal, unsigned flags,
		     int display_canonical)
{
  int i;

  if (type == bp_hardware_breakpoint)
    {
      int target_resources_ok;

      i = hw_breakpoint_used_count ();
      target_resources_ok =
	target_can_use_hardware_watchpoint (bp_hardware_breakpoint,
					    i + 1, 0);
      if (target_resources_ok == 0)
	error (_("No hardware breakpoint support in the target."));
      else if (target_resources_ok < 0)
	error (_("Hardware breakpoints used exceeds limit."));
    }

  gdb_assert (!sals.empty ());

  for (const auto &sal : sals)
    {
      struct bp_location *loc;

      if (from_tty)
	{
	  struct gdbarch *loc_gdbarch = get_sal_arch (sal);
	  if (!loc_gdbarch)
	    loc_gdbarch = gdbarch;

	  describe_other_breakpoints (loc_gdbarch,
				      sal.pspace, sal.pc, sal.section, thread);
	}

      if (&sal == &sals[0])
	{
	  init_raw_breakpoint (b, gdbarch, sal, type, ops);
	  b->thread = thread;
	  b->task = task;

	  b->cond_string = cond_string.release ();
	  b->extra_string = extra_string.release ();
	  b->ignore_count = ignore_count;
	  b->enable_state = enabled ? bp_enabled : bp_disabled;
	  b->disposition = disposition;

	  if ((flags & CREATE_BREAKPOINT_FLAGS_INSERTED) != 0)
	    b->loc->inserted = 1;

	  if (type == bp_static_tracepoint)
	    {
	      struct tracepoint *t = (struct tracepoint *) b;
	      struct static_tracepoint_marker marker;

	      if (strace_marker_p (b))
		{
		  /* We already know the marker exists, otherwise, we
		     wouldn't see a sal for it.  */
		  const char *p
		    = &event_location_to_string (b->location.get ())[3];
		  const char *endp;

		  p = skip_spaces (p);

		  endp = skip_to_space (p);

		  t->static_trace_marker_id.assign (p, endp - p);

		  printf_filtered (_("Probed static tracepoint "
				     "marker \"%s\"\n"),
				   t->static_trace_marker_id.c_str ());
		}
	      else if (target_static_tracepoint_marker_at (sal.pc, &marker))
		{
		  t->static_trace_marker_id = std::move (marker.str_id);

		  printf_filtered (_("Probed static tracepoint "
				     "marker \"%s\"\n"),
				   t->static_trace_marker_id.c_str ());
		}
	      else
		warning (_("Couldn't determine the static "
			   "tracepoint marker to probe"));
	    }

	  loc = b->loc;
	}
      else
	{
	  loc = add_location_to_breakpoint (b, &sal);
	  if ((flags & CREATE_BREAKPOINT_FLAGS_INSERTED) != 0)
	    loc->inserted = 1;
	}

      if (b->cond_string)
	{
	  const char *arg = b->cond_string;

	  loc->cond = parse_exp_1 (&arg, loc->address,
				   block_for_pc (loc->address), 0);
	  if (*arg)
              error (_("Garbage '%s' follows condition"), arg);
	}

      /* Dynamic printf requires and uses additional arguments on the
	 command line, otherwise it's an error.  */
      if (type == bp_dprintf)
	{
	  if (b->extra_string)
	    update_dprintf_command_list (b);
	  else
	    error (_("Format string required"));
	}
      else if (b->extra_string)
	error (_("Garbage '%s' at end of command"), b->extra_string);
    }

  b->display_canonical = display_canonical;
  if (location != NULL)
    b->location = std::move (location);
  else
    b->location = new_address_location (b->loc->address, NULL, 0);
  b->filter = filter.release ();
}

static void
create_breakpoint_sal (struct gdbarch *gdbarch,
		       gdb::array_view<const symtab_and_line> sals,
		       event_location_up &&location,
		       gdb::unique_xmalloc_ptr<char> filter,
		       gdb::unique_xmalloc_ptr<char> cond_string,
		       gdb::unique_xmalloc_ptr<char> extra_string,
		       enum bptype type, enum bpdisp disposition,
		       int thread, int task, int ignore_count,
		       const struct breakpoint_ops *ops, int from_tty,
		       int enabled, int internal, unsigned flags,
		       int display_canonical)
{
  std::unique_ptr<breakpoint> b = new_breakpoint_from_type (type);

  init_breakpoint_sal (b.get (), gdbarch,
		       sals, std::move (location),
		       std::move (filter),
		       std::move (cond_string),
		       std::move (extra_string),
		       type, disposition,
		       thread, task, ignore_count,
		       ops, from_tty,
		       enabled, internal, flags,
		       display_canonical);

  install_breakpoint (internal, std::move (b), 0);
}

/* Add SALS.nelts breakpoints to the breakpoint table.  For each
   SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
   value.  COND_STRING, if not NULL, specified the condition to be
   used for all breakpoints.  Essentially the only case where
   SALS.nelts is not 1 is when we set a breakpoint on an overloaded
   function.  In that case, it's still not possible to specify
   separate conditions for different overloaded functions, so
   we take just a single condition string.
   
   NOTE: If the function succeeds, the caller is expected to cleanup
   the arrays ADDR_STRING, COND_STRING, and SALS (but not the
   array contents).  If the function fails (error() is called), the
   caller is expected to cleanups both the ADDR_STRING, COND_STRING,
   COND and SALS arrays and each of those arrays contents.  */

static void
create_breakpoints_sal (struct gdbarch *gdbarch,
			struct linespec_result *canonical,
			gdb::unique_xmalloc_ptr<char> cond_string,
			gdb::unique_xmalloc_ptr<char> extra_string,
			enum bptype type, enum bpdisp disposition,
			int thread, int task, int ignore_count,
			const struct breakpoint_ops *ops, int from_tty,
			int enabled, int internal, unsigned flags)
{
  if (canonical->pre_expanded)
    gdb_assert (canonical->lsals.size () == 1);

  for (const auto &lsal : canonical->lsals)
    {
      /* Note that 'location' can be NULL in the case of a plain
	 'break', without arguments.  */
      event_location_up location
	= (canonical->location != NULL
	   ? copy_event_location (canonical->location.get ()) : NULL);
      gdb::unique_xmalloc_ptr<char> filter_string
	(lsal.canonical != NULL ? xstrdup (lsal.canonical) : NULL);

      create_breakpoint_sal (gdbarch, lsal.sals,
			     std::move (location),
			     std::move (filter_string),
			     std::move (cond_string),
			     std::move (extra_string),
			     type, disposition,
			     thread, task, ignore_count, ops,
			     from_tty, enabled, internal, flags,
			     canonical->special_display);
    }
}

/* Parse LOCATION which is assumed to be a SAL specification possibly
   followed by conditionals.  On return, SALS contains an array of SAL
   addresses found.  LOCATION points to the end of the SAL (for
   linespec locations).

   The array and the line spec strings are allocated on the heap, it is
   the caller's responsibility to free them.  */

static void
parse_breakpoint_sals (const struct event_location *location,
		       struct linespec_result *canonical)
{
  struct symtab_and_line cursal;

  if (event_location_type (location) == LINESPEC_LOCATION)
    {
      const char *spec = get_linespec_location (location)->spec_string;

      if (spec == NULL)
	{
	  /* The last displayed codepoint, if it's valid, is our default
	     breakpoint address.  */
	  if (last_displayed_sal_is_valid ())
	    {
	      /* Set sal's pspace, pc, symtab, and line to the values
		 corresponding to the last call to print_frame_info.
		 Be sure to reinitialize LINE with NOTCURRENT == 0
		 as the breakpoint line number is inappropriate otherwise.
		 find_pc_line would adjust PC, re-set it back.  */
	      symtab_and_line sal = get_last_displayed_sal ();
	      CORE_ADDR pc = sal.pc;

	      sal = find_pc_line (pc, 0);

	      /* "break" without arguments is equivalent to "break *PC"
		 where PC is the last displayed codepoint's address.  So
		 make sure to set sal.explicit_pc to prevent GDB from
		 trying to expand the list of sals to include all other
		 instances with the same symtab and line.  */
	      sal.pc = pc;
	      sal.explicit_pc = 1;

	      struct linespec_sals lsal;
	      lsal.sals = {sal};
	      lsal.canonical = NULL;

	      canonical->lsals.push_back (std::move (lsal));
	      return;
	    }
	  else
	    error (_("No default breakpoint address now."));
	}
    }

  /* Force almost all breakpoints to be in terms of the
     current_source_symtab (which is decode_line_1's default).
     This should produce the results we want almost all of the
     time while leaving default_breakpoint_* alone.

     ObjC: However, don't match an Objective-C method name which
     may have a '+' or '-' succeeded by a '['.  */
  cursal = get_current_source_symtab_and_line ();
  if (last_displayed_sal_is_valid ())
    {
      const char *spec = NULL;

      if (event_location_type (location) == LINESPEC_LOCATION)
	spec = get_linespec_location (location)->spec_string;

      if (!cursal.symtab
	  || (spec != NULL
	      && strchr ("+-", spec[0]) != NULL
	      && spec[1] != '['))
	{
	  decode_line_full (location, DECODE_LINE_FUNFIRSTLINE, NULL,
			    get_last_displayed_symtab (),
			    get_last_displayed_line (),
			    canonical, NULL, NULL);
	  return;
	}
    }

  decode_line_full (location, DECODE_LINE_FUNFIRSTLINE, NULL,
		    cursal.symtab, cursal.line, canonical, NULL, NULL);
}


/* Convert each SAL into a real PC.  Verify that the PC can be
   inserted as a breakpoint.  If it can't throw an error.  */

static void
breakpoint_sals_to_pc (std::vector<symtab_and_line> &sals)
{    
  for (auto &sal : sals)
    resolve_sal_pc (&sal);
}

/* Fast tracepoints may have restrictions on valid locations.  For
   instance, a fast tracepoint using a jump instead of a trap will
   likely have to overwrite more bytes than a trap would, and so can
   only be placed where the instruction is longer than the jump, or a
   multi-instruction sequence does not have a jump into the middle of
   it, etc.  */

static void
check_fast_tracepoint_sals (struct gdbarch *gdbarch,
			    gdb::array_view<const symtab_and_line> sals)
{
  for (const auto &sal : sals)
    {
      struct gdbarch *sarch;

      sarch = get_sal_arch (sal);
      /* We fall back to GDBARCH if there is no architecture
	 associated with SAL.  */
      if (sarch == NULL)
	sarch = gdbarch;
      std::string msg;
      if (!gdbarch_fast_tracepoint_valid_at (sarch, sal.pc, &msg))
	error (_("May not have a fast tracepoint at %s%s"),
	       paddress (sarch, sal.pc), msg.c_str ());
    }
}

/* Given TOK, a string specification of condition and thread, as
   accepted by the 'break' command, extract the condition
   string and thread number and set *COND_STRING and *THREAD.
   PC identifies the context at which the condition should be parsed.
   If no condition is found, *COND_STRING is set to NULL.
   If no thread is found, *THREAD is set to -1.  */

static void
find_condition_and_thread (const char *tok, CORE_ADDR pc,
			   char **cond_string, int *thread, int *task,
			   char **rest)
{
  *cond_string = NULL;
  *thread = -1;
  *task = 0;
  *rest = NULL;

  while (tok && *tok)
    {
      const char *end_tok;
      int toklen;
      const char *cond_start = NULL;
      const char *cond_end = NULL;

      tok = skip_spaces (tok);

      if ((*tok == '"' || *tok == ',') && rest)
	{
	  *rest = savestring (tok, strlen (tok));
	  return;
	}

      end_tok = skip_to_space (tok);

      toklen = end_tok - tok;

      if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
	{
	  tok = cond_start = end_tok + 1;
	  parse_exp_1 (&tok, pc, block_for_pc (pc), 0);
	  cond_end = tok;
	  *cond_string = savestring (cond_start, cond_end - cond_start);
	}
      else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
	{
	  const char *tmptok;
	  struct thread_info *thr;

	  tok = end_tok + 1;
	  thr = parse_thread_id (tok, &tmptok);
	  if (tok == tmptok)
	    error (_("Junk after thread keyword."));
	  *thread = thr->global_num;
	  tok = tmptok;
	}
      else if (toklen >= 1 && strncmp (tok, "task", toklen) == 0)
	{
	  char *tmptok;

	  tok = end_tok + 1;
	  *task = strtol (tok, &tmptok, 0);
	  if (tok == tmptok)
	    error (_("Junk after task keyword."));
	  if (!valid_task_id (*task))
	    error (_("Unknown task %d."), *task);
	  tok = tmptok;
	}
      else if (rest)
	{
	  *rest = savestring (tok, strlen (tok));
	  return;
	}
      else
	error (_("Junk at end of arguments."));
    }
}

/* Decode a static tracepoint marker spec.  */

static std::vector<symtab_and_line>
decode_static_tracepoint_spec (const char **arg_p)
{
  const char *p = &(*arg_p)[3];
  const char *endp;

  p = skip_spaces (p);

  endp = skip_to_space (p);

  std::string marker_str (p, endp - p);

  std::vector<static_tracepoint_marker> markers
    = target_static_tracepoint_markers_by_strid (marker_str.c_str ());
  if (markers.empty ())
    error (_("No known static tracepoint marker named %s"),
	   marker_str.c_str ());

  std::vector<symtab_and_line> sals;
  sals.reserve (markers.size ());

  for (const static_tracepoint_marker &marker : markers)
    {
      symtab_and_line sal = find_pc_line (marker.address, 0);
      sal.pc = marker.address;
      sals.push_back (sal);
   }

  *arg_p = endp;
  return sals;
}

/* See breakpoint.h.  */

int
create_breakpoint (struct gdbarch *gdbarch,
		   const struct event_location *location,
		   const char *cond_string,
		   int thread, const char *extra_string,
		   int parse_extra,
		   int tempflag, enum bptype type_wanted,
		   int ignore_count,
		   enum auto_boolean pending_break_support,
		   const struct breakpoint_ops *ops,
		   int from_tty, int enabled, int internal,
		   unsigned flags)
{
  struct linespec_result canonical;
  struct cleanup *bkpt_chain = NULL;
  int pending = 0;
  int task = 0;
  int prev_bkpt_count = breakpoint_count;

  gdb_assert (ops != NULL);

  /* If extra_string isn't useful, set it to NULL.  */
  if (extra_string != NULL && *extra_string == '\0')
    extra_string = NULL;

  TRY
    {
      ops->create_sals_from_location (location, &canonical, type_wanted);
    }
  CATCH (e, RETURN_MASK_ERROR)
    {
      /* If caller is interested in rc value from parse, set
	 value.  */
      if (e.error == NOT_FOUND_ERROR)
	{
	  /* If pending breakpoint support is turned off, throw
	     error.  */

	  if (pending_break_support == AUTO_BOOLEAN_FALSE)
	    throw_exception (e);

	  exception_print (gdb_stderr, e);

          /* If pending breakpoint support is auto query and the user
	     selects no, then simply return the error code.  */
	  if (pending_break_support == AUTO_BOOLEAN_AUTO
	      && !nquery (_("Make %s pending on future shared library load? "),
			  bptype_string (type_wanted)))
	    return 0;

	  /* At this point, either the user was queried about setting
	     a pending breakpoint and selected yes, or pending
	     breakpoint behavior is on and thus a pending breakpoint
	     is defaulted on behalf of the user.  */
	  pending = 1;
	}
      else
	throw_exception (e);
    }
  END_CATCH

  if (!pending && canonical.lsals.empty ())
    return 0;

  /* ----------------------------- SNIP -----------------------------
     Anything added to the cleanup chain beyond this point is assumed
     to be part of a breakpoint.  If the breakpoint create succeeds
     then the memory is not reclaimed.  */
  bkpt_chain = make_cleanup (null_cleanup, 0);

  /* Resolve all line numbers to PC's and verify that the addresses
     are ok for the target.  */
  if (!pending)
    {
      for (auto &lsal : canonical.lsals)
	breakpoint_sals_to_pc (lsal.sals);
    }

  /* Fast tracepoints may have additional restrictions on location.  */
  if (!pending && type_wanted == bp_fast_tracepoint)
    {
      for (const auto &lsal : canonical.lsals)
	check_fast_tracepoint_sals (gdbarch, lsal.sals);
    }

  /* Verify that condition can be parsed, before setting any
     breakpoints.  Allocate a separate condition expression for each
     breakpoint.  */
  if (!pending)
    {
      gdb::unique_xmalloc_ptr<char> cond_string_copy;
      gdb::unique_xmalloc_ptr<char> extra_string_copy;

      if (parse_extra)
        {
	  char *rest;
	  char *cond;

	  const linespec_sals &lsal = canonical.lsals[0];

	  /* Here we only parse 'arg' to separate condition
	     from thread number, so parsing in context of first
	     sal is OK.  When setting the breakpoint we'll
	     re-parse it in context of each sal.  */

	  find_condition_and_thread (extra_string, lsal.sals[0].pc,
				     &cond, &thread, &task, &rest);
	  cond_string_copy.reset (cond);
	  extra_string_copy.reset (rest);
        }
      else
        {
	  if (type_wanted != bp_dprintf
	      && extra_string != NULL && *extra_string != '\0')
		error (_("Garbage '%s' at end of location"), extra_string);

	  /* Create a private copy of condition string.  */
	  if (cond_string)
	    cond_string_copy.reset (xstrdup (cond_string));
	  /* Create a private copy of any extra string.  */
	  if (extra_string)
	    extra_string_copy.reset (xstrdup (extra_string));
        }

      ops->create_breakpoints_sal (gdbarch, &canonical,
				   std::move (cond_string_copy),
				   std::move (extra_string_copy),
				   type_wanted,
				   tempflag ? disp_del : disp_donttouch,
				   thread, task, ignore_count, ops,
				   from_tty, enabled, internal, flags);
    }
  else
    {
      std::unique_ptr <breakpoint> b = new_breakpoint_from_type (type_wanted);

      init_raw_breakpoint_without_location (b.get (), gdbarch, type_wanted, ops);
      b->location = copy_event_location (location);

      if (parse_extra)
	b->cond_string = NULL;
      else
	{
	  /* Create a private copy of condition string.  */
	  b->cond_string = cond_string != NULL ? xstrdup (cond_string) : NULL;
	  b->thread = thread;
	}

      /* Create a private copy of any extra string.  */
      b->extra_string = extra_string != NULL ? xstrdup (extra_string) : NULL;
      b->ignore_count = ignore_count;
      b->disposition = tempflag ? disp_del : disp_donttouch;
      b->condition_not_parsed = 1;
      b->enable_state = enabled ? bp_enabled : bp_disabled;
      if ((type_wanted != bp_breakpoint
           && type_wanted != bp_hardware_breakpoint) || thread != -1)
	b->pspace = current_program_space;

      install_breakpoint (internal, std::move (b), 0);
    }
  
  if (canonical.lsals.size () > 1)
    {
      warning (_("Multiple breakpoints were set.\nUse the "
		 "\"delete\" command to delete unwanted breakpoints."));
      prev_breakpoint_count = prev_bkpt_count;
    }

  /* That's it.  Discard the cleanups for data inserted into the
     breakpoint.  */
  discard_cleanups (bkpt_chain);

  /* error call may happen here - have BKPT_CHAIN already discarded.  */
  update_global_location_list (UGLL_MAY_INSERT);

  return 1;
}

/* Set a breakpoint.
   ARG is a string describing breakpoint address,
   condition, and thread.
   FLAG specifies if a breakpoint is hardware on,
   and if breakpoint is temporary, using BP_HARDWARE_FLAG
   and BP_TEMPFLAG.  */

static void
break_command_1 (const char *arg, int flag, int from_tty)
{
  int tempflag = flag & BP_TEMPFLAG;
  enum bptype type_wanted = (flag & BP_HARDWAREFLAG
			     ? bp_hardware_breakpoint
			     : bp_breakpoint);
  struct breakpoint_ops *ops;

  event_location_up location = string_to_event_location (&arg, current_language);

  /* Matching breakpoints on probes.  */
  if (location != NULL
      && event_location_type (location.get ()) == PROBE_LOCATION)
    ops = &bkpt_probe_breakpoint_ops;
  else
    ops = &bkpt_breakpoint_ops;

  create_breakpoint (get_current_arch (),
		     location.get (),
		     NULL, 0, arg, 1 /* parse arg */,
		     tempflag, type_wanted,
		     0 /* Ignore count */,
		     pending_break_support,
		     ops,
		     from_tty,
		     1 /* enabled */,
		     0 /* internal */,
		     0);
}

/* Helper function for break_command_1 and disassemble_command.  */

void
resolve_sal_pc (struct symtab_and_line *sal)
{
  CORE_ADDR pc;

  if (sal->pc == 0 && sal->symtab != NULL)
    {
      if (!find_line_pc (sal->symtab, sal->line, &pc))
	error (_("No line %d in file \"%s\"."),
	       sal->line, symtab_to_filename_for_display (sal->symtab));
      sal->pc = pc;

      /* If this SAL corresponds to a breakpoint inserted using a line
         number, then skip the function prologue if necessary.  */
      if (sal->explicit_line)
	skip_prologue_sal (sal);
    }

  if (sal->section == 0 && sal->symtab != NULL)
    {
      const struct blockvector *bv;
      const struct block *b;
      struct symbol *sym;

      bv = blockvector_for_pc_sect (sal->pc, 0, &b,
				    SYMTAB_COMPUNIT (sal->symtab));
      if (bv != NULL)
	{
	  sym = block_linkage_function (b);
	  if (sym != NULL)
	    {
	      fixup_symbol_section (sym, SYMTAB_OBJFILE (sal->symtab));
	      sal->section = SYMBOL_OBJ_SECTION (SYMTAB_OBJFILE (sal->symtab),
						 sym);
	    }
	  else
	    {
	      /* It really is worthwhile to have the section, so we'll
	         just have to look harder. This case can be executed
	         if we have line numbers but no functions (as can
	         happen in assembly source).  */

	      scoped_restore_current_pspace_and_thread restore_pspace_thread;
	      switch_to_program_space_and_thread (sal->pspace);

	      bound_minimal_symbol msym = lookup_minimal_symbol_by_pc (sal->pc);
	      if (msym.minsym)
		sal->section = MSYMBOL_OBJ_SECTION (msym.objfile, msym.minsym);
	    }
	}
    }
}

void
break_command (const char *arg, int from_tty)
{
  break_command_1 (arg, 0, from_tty);
}

void
tbreak_command (const char *arg, int from_tty)
{
  break_command_1 (arg, BP_TEMPFLAG, from_tty);
}

static void
hbreak_command (const char *arg, int from_tty)
{
  break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
}

static void
thbreak_command (const char *arg, int from_tty)
{
  break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
}

static void
stop_command (const char *arg, int from_tty)
{
  printf_filtered (_("Specify the type of breakpoint to set.\n\
Usage: stop in <function | address>\n\
       stop at <line>\n"));
}

static void
stopin_command (const char *arg, int from_tty)
{
  int badInput = 0;

  if (arg == (char *) NULL)
    badInput = 1;
  else if (*arg != '*')
    {
      const char *argptr = arg;
      int hasColon = 0;

      /* Look for a ':'.  If this is a line number specification, then
         say it is bad, otherwise, it should be an address or
         function/method name.  */
      while (*argptr && !hasColon)
	{
	  hasColon = (*argptr == ':');
	  argptr++;
	}

      if (hasColon)
	badInput = (*argptr != ':');	/* Not a class::method */
      else
	badInput = isdigit (*arg);	/* a simple line number */
    }

  if (badInput)
    printf_filtered (_("Usage: stop in <function | address>\n"));
  else
    break_command_1 (arg, 0, from_tty);
}

static void
stopat_command (const char *arg, int from_tty)
{
  int badInput = 0;

  if (arg == (char *) NULL || *arg == '*')	/* no line number */
    badInput = 1;
  else
    {
      const char *argptr = arg;
      int hasColon = 0;

      /* Look for a ':'.  If there is a '::' then get out, otherwise
         it is probably a line number.  */
      while (*argptr && !hasColon)
	{
	  hasColon = (*argptr == ':');
	  argptr++;
	}

      if (hasColon)
	badInput = (*argptr == ':');	/* we have class::method */
      else
	badInput = !isdigit (*arg);	/* not a line number */
    }

  if (badInput)
    printf_filtered (_("Usage: stop at <line>\n"));
  else
    break_command_1 (arg, 0, from_tty);
}

/* The dynamic printf command is mostly like a regular breakpoint, but
   with a prewired command list consisting of a single output command,
   built from extra arguments supplied on the dprintf command
   line.  */

static void
dprintf_command (const char *arg, int from_tty)
{
  event_location_up location = string_to_event_location (&arg, current_language);

  /* If non-NULL, ARG should have been advanced past the location;
     the next character must be ','.  */
  if (arg != NULL)
    {
      if (arg[0] != ',' || arg[1] == '\0')
	error (_("Format string required"));
      else
	{
	  /* Skip the comma.  */
	  ++arg;
	}
    }

  create_breakpoint (get_current_arch (),
		     location.get (),
		     NULL, 0, arg, 1 /* parse arg */,
		     0, bp_dprintf,
		     0 /* Ignore count */,
		     pending_break_support,
		     &dprintf_breakpoint_ops,
		     from_tty,
		     1 /* enabled */,
		     0 /* internal */,
		     0);
}

static void
agent_printf_command (const char *arg, int from_tty)
{
  error (_("May only run agent-printf on the target"));
}

/* Implement the "breakpoint_hit" breakpoint_ops method for
   ranged breakpoints.  */

static int
breakpoint_hit_ranged_breakpoint (const struct bp_location *bl,
				  const address_space *aspace,
				  CORE_ADDR bp_addr,
				  const struct target_waitstatus *ws)
{
  if (ws->kind != TARGET_WAITKIND_STOPPED
      || ws->value.sig != GDB_SIGNAL_TRAP)
    return 0;

  return breakpoint_address_match_range (bl->pspace->aspace, bl->address,
					 bl->length, aspace, bp_addr);
}

/* Implement the "resources_needed" breakpoint_ops method for
   ranged breakpoints.  */

static int
resources_needed_ranged_breakpoint (const struct bp_location *bl)
{
  return target_ranged_break_num_registers ();
}

/* Implement the "print_it" breakpoint_ops method for
   ranged breakpoints.  */

static enum print_stop_action
print_it_ranged_breakpoint (bpstat bs)
{
  struct breakpoint *b = bs->breakpoint_at;
  struct bp_location *bl = b->loc;
  struct ui_out *uiout = current_uiout;

  gdb_assert (b->type == bp_hardware_breakpoint);

  /* Ranged breakpoints have only one location.  */
  gdb_assert (bl && bl->next == NULL);

  annotate_breakpoint (b->number);

  maybe_print_thread_hit_breakpoint (uiout);

  if (b->disposition == disp_del)
    uiout->text ("Temporary ranged breakpoint ");
  else
    uiout->text ("Ranged breakpoint ");
  if (uiout->is_mi_like_p ())
    {
      uiout->field_string ("reason",
		      async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
      uiout->field_string ("disp", bpdisp_text (b->disposition));
    }
  uiout->field_int ("bkptno", b->number);
  uiout->text (", ");

  return PRINT_SRC_AND_LOC;
}

/* Implement the "print_one" breakpoint_ops method for
   ranged breakpoints.  */

static void
print_one_ranged_breakpoint (struct breakpoint *b,
			     struct bp_location **last_loc)
{
  struct bp_location *bl = b->loc;
  struct value_print_options opts;
  struct ui_out *uiout = current_uiout;

  /* Ranged breakpoints have only one location.  */
  gdb_assert (bl && bl->next == NULL);

  get_user_print_options (&opts);

  if (opts.addressprint)
    /* We don't print the address range here, it will be printed later
       by print_one_detail_ranged_breakpoint.  */
    uiout->field_skip ("addr");
  annotate_field (5);
  print_breakpoint_location (b, bl);
  *last_loc = bl;
}

/* Implement the "print_one_detail" breakpoint_ops method for
   ranged breakpoints.  */

static void
print_one_detail_ranged_breakpoint (const struct breakpoint *b,
				    struct ui_out *uiout)
{
  CORE_ADDR address_start, address_end;
  struct bp_location *bl = b->loc;
  string_file stb;

  gdb_assert (bl);

  address_start = bl->address;
  address_end = address_start + bl->length - 1;

  uiout->text ("\taddress range: ");
  stb.printf ("[%s, %s]",
	      print_core_address (bl->gdbarch, address_start),
	      print_core_address (bl->gdbarch, address_end));
  uiout->field_stream ("addr", stb);
  uiout->text ("\n");
}

/* Implement the "print_mention" breakpoint_ops method for
   ranged breakpoints.  */

static void
print_mention_ranged_breakpoint (struct breakpoint *b)
{
  struct bp_location *bl = b->loc;
  struct ui_out *uiout = current_uiout;

  gdb_assert (bl);
  gdb_assert (b->type == bp_hardware_breakpoint);

  if (uiout->is_mi_like_p ())
    return;

  printf_filtered (_("Hardware assisted ranged breakpoint %d from %s to %s."),
		   b->number, paddress (bl->gdbarch, bl->address),
		   paddress (bl->gdbarch, bl->address + bl->length - 1));
}

/* Implement the "print_recreate" breakpoint_ops method for
   ranged breakpoints.  */

static void
print_recreate_ranged_breakpoint (struct breakpoint *b, struct ui_file *fp)
{
  fprintf_unfiltered (fp, "break-range %s, %s",
		      event_location_to_string (b->location.get ()),
		      event_location_to_string (b->location_range_end.get ()));
  print_recreate_thread (b, fp);
}

/* The breakpoint_ops structure to be used in ranged breakpoints.  */

static struct breakpoint_ops ranged_breakpoint_ops;

/* Find the address where the end of the breakpoint range should be
   placed, given the SAL of the end of the range.  This is so that if
   the user provides a line number, the end of the range is set to the
   last instruction of the given line.  */

static CORE_ADDR
find_breakpoint_range_end (struct symtab_and_line sal)
{
  CORE_ADDR end;

  /* If the user provided a PC value, use it.  Otherwise,
     find the address of the end of the given location.  */
  if (sal.explicit_pc)
    end = sal.pc;
  else
    {
      int ret;
      CORE_ADDR start;

      ret = find_line_pc_range (sal, &start, &end);
      if (!ret)
	error (_("Could not find location of the end of the range."));

      /* find_line_pc_range returns the start of the next line.  */
      end--;
    }

  return end;
}

/* Implement the "break-range" CLI command.  */

static void
break_range_command (const char *arg, int from_tty)
{
  const char *arg_start;
  struct linespec_result canonical_start, canonical_end;
  int bp_count, can_use_bp, length;
  CORE_ADDR end;
  struct breakpoint *b;

  /* We don't support software ranged breakpoints.  */
  if (target_ranged_break_num_registers () < 0)
    error (_("This target does not support hardware ranged breakpoints."));

  bp_count = hw_breakpoint_used_count ();
  bp_count += target_ranged_break_num_registers ();
  can_use_bp = target_can_use_hardware_watchpoint (bp_hardware_breakpoint,
						   bp_count, 0);
  if (can_use_bp < 0)
    error (_("Hardware breakpoints used exceeds limit."));

  arg = skip_spaces (arg);
  if (arg == NULL || arg[0] == '\0')
    error(_("No address range specified."));

  arg_start = arg;
  event_location_up start_location = string_to_event_location (&arg,
							       current_language);
  parse_breakpoint_sals (start_location.get (), &canonical_start);

  if (arg[0] != ',')
    error (_("Too few arguments."));
  else if (canonical_start.lsals.empty ())
    error (_("Could not find location of the beginning of the range."));

  const linespec_sals &lsal_start = canonical_start.lsals[0];

  if (canonical_start.lsals.size () > 1
      || lsal_start.sals.size () != 1)
    error (_("Cannot create a ranged breakpoint with multiple locations."));

  const symtab_and_line &sal_start = lsal_start.sals[0];
  std::string addr_string_start (arg_start, arg - arg_start);

  arg++;	/* Skip the comma.  */
  arg = skip_spaces (arg);

  /* Parse the end location.  */

  arg_start = arg;

  /* We call decode_line_full directly here instead of using
     parse_breakpoint_sals because we need to specify the start location's
     symtab and line as the default symtab and line for the end of the
     range.  This makes it possible to have ranges like "foo.c:27, +14",
     where +14 means 14 lines from the start location.  */
  event_location_up end_location = string_to_event_location (&arg,
							     current_language);
  decode_line_full (end_location.get (), DECODE_LINE_FUNFIRSTLINE, NULL,
		    sal_start.symtab, sal_start.line,
		    &canonical_end, NULL, NULL);

  if (canonical_end.lsals.empty ())
    error (_("Could not find location of the end of the range."));

  const linespec_sals &lsal_end = canonical_end.lsals[0];
  if (canonical_end.lsals.size () > 1
      || lsal_end.sals.size () != 1)
    error (_("Cannot create a ranged breakpoint with multiple locations."));

  const symtab_and_line &sal_end = lsal_end.sals[0];

  end = find_breakpoint_range_end (sal_end);
  if (sal_start.pc > end)
    error (_("Invalid address range, end precedes start."));

  length = end - sal_start.pc + 1;
  if (length < 0)
    /* Length overflowed.  */
    error (_("Address range too large."));
  else if (length == 1)
    {
      /* This range is simple enough to be handled by
	 the `hbreak' command.  */
      hbreak_command (&addr_string_start[0], 1);

      return;
    }

  /* Now set up the breakpoint.  */
  b = set_raw_breakpoint (get_current_arch (), sal_start,
			  bp_hardware_breakpoint, &ranged_breakpoint_ops);
  set_breakpoint_count (breakpoint_count + 1);
  b->number = breakpoint_count;
  b->disposition = disp_donttouch;
  b->location = std::move (start_location);
  b->location_range_end = std::move (end_location);
  b->loc->length = length;

  mention (b);
  gdb::observers::breakpoint_created.notify (b);
  update_global_location_list (UGLL_MAY_INSERT);
}

/*  Return non-zero if EXP is verified as constant.  Returned zero
    means EXP is variable.  Also the constant detection may fail for
    some constant expressions and in such case still falsely return
    zero.  */

static int
watchpoint_exp_is_const (const struct expression *exp)
{
  int i = exp->nelts;

  while (i > 0)
    {
      int oplenp, argsp;

      /* We are only interested in the descriptor of each element.  */
      operator_length (exp, i, &oplenp, &argsp);
      i -= oplenp;

      switch (exp->elts[i].opcode)
	{
	case BINOP_ADD:
	case BINOP_SUB:
	case BINOP_MUL:
	case BINOP_DIV:
	case BINOP_REM:
	case BINOP_MOD:
	case BINOP_LSH:
	case BINOP_RSH:
	case BINOP_LOGICAL_AND:
	case BINOP_LOGICAL_OR:
	case BINOP_BITWISE_AND:
	case BINOP_BITWISE_IOR:
	case BINOP_BITWISE_XOR:
	case BINOP_EQUAL:
	case BINOP_NOTEQUAL:
	case BINOP_LESS:
	case BINOP_GTR:
	case BINOP_LEQ:
	case BINOP_GEQ:
	case BINOP_REPEAT:
	case BINOP_COMMA:
	case BINOP_EXP:
	case BINOP_MIN:
	case BINOP_MAX:
	case BINOP_INTDIV:
	case BINOP_CONCAT:
	case TERNOP_COND:
	case TERNOP_SLICE:

	case OP_LONG:
	case OP_FLOAT:
	case OP_LAST:
	case OP_COMPLEX:
	case OP_STRING:
	case OP_ARRAY:
	case OP_TYPE:
	case OP_TYPEOF:
	case OP_DECLTYPE:
	case OP_TYPEID:
	case OP_NAME:
	case OP_OBJC_NSSTRING:

	case UNOP_NEG:
	case UNOP_LOGICAL_NOT:
	case UNOP_COMPLEMENT:
	case UNOP_ADDR:
	case UNOP_HIGH:
	case UNOP_CAST:

	case UNOP_CAST_TYPE:
	case UNOP_REINTERPRET_CAST:
	case UNOP_DYNAMIC_CAST:
	  /* Unary, binary and ternary operators: We have to check
	     their operands.  If they are constant, then so is the
	     result of that operation.  For instance, if A and B are
	     determined to be constants, then so is "A + B".

	     UNOP_IND is one exception to the rule above, because the
	     value of *ADDR is not necessarily a constant, even when
	     ADDR is.  */
	  break;

	case OP_VAR_VALUE:
	  /* Check whether the associated symbol is a constant.

	     We use SYMBOL_CLASS rather than TYPE_CONST because it's
	     possible that a buggy compiler could mark a variable as
	     constant even when it is not, and TYPE_CONST would return
	     true in this case, while SYMBOL_CLASS wouldn't.

	     We also have to check for function symbols because they
	     are always constant.  */
	  {
	    struct symbol *s = exp->elts[i + 2].symbol;

	    if (SYMBOL_CLASS (s) != LOC_BLOCK
		&& SYMBOL_CLASS (s) != LOC_CONST
		&& SYMBOL_CLASS (s) != LOC_CONST_BYTES)
	      return 0;
	    break;
	  }

	/* The default action is to return 0 because we are using
	   the optimistic approach here: If we don't know something,
	   then it is not a constant.  */
	default:
	  return 0;
	}
    }

  return 1;
}

/* Watchpoint destructor.  */

watchpoint::~watchpoint ()
{
  xfree (this->exp_string);
  xfree (this->exp_string_reparse);
}

/* Implement the "re_set" breakpoint_ops method for watchpoints.  */

static void
re_set_watchpoint (struct breakpoint *b)
{
  struct watchpoint *w = (struct watchpoint *) b;

  /* Watchpoint can be either on expression using entirely global
     variables, or it can be on local variables.

     Watchpoints of the first kind are never auto-deleted, and even
     persist across program restarts.  Since they can use variables
     from shared libraries, we need to reparse expression as libraries
     are loaded and unloaded.

     Watchpoints on local variables can also change meaning as result
     of solib event.  For example, if a watchpoint uses both a local
     and a global variables in expression, it's a local watchpoint,
     but unloading of a shared library will make the expression
     invalid.  This is not a very common use case, but we still
     re-evaluate expression, to avoid surprises to the user.

     Note that for local watchpoints, we re-evaluate it only if
     watchpoints frame id is still valid.  If it's not, it means the
     watchpoint is out of scope and will be deleted soon.  In fact,
     I'm not sure we'll ever be called in this case.

     If a local watchpoint's frame id is still valid, then
     w->exp_valid_block is likewise valid, and we can safely use it.

     Don't do anything about disabled watchpoints, since they will be
     reevaluated again when enabled.  */
  update_watchpoint (w, 1 /* reparse */);
}

/* Implement the "insert" breakpoint_ops method for hardware watchpoints.  */

static int
insert_watchpoint (struct bp_location *bl)
{
  struct watchpoint *w = (struct watchpoint *) bl->owner;
  int length = w->exact ? 1 : bl->length;

  return target_insert_watchpoint (bl->address, length, bl->watchpoint_type,
				   w->cond_exp.get ());
}

/* Implement the "remove" breakpoint_ops method for hardware watchpoints.  */

static int
remove_watchpoint (struct bp_location *bl, enum remove_bp_reason reason)
{
  struct watchpoint *w = (struct watchpoint *) bl->owner;
  int length = w->exact ? 1 : bl->length;

  return target_remove_watchpoint (bl->address, length, bl->watchpoint_type,
				   w->cond_exp.get ());
}

static int
breakpoint_hit_watchpoint (const struct bp_location *bl,
			   const address_space *aspace, CORE_ADDR bp_addr,
			   const struct target_waitstatus *ws)
{
  struct breakpoint *b = bl->owner;
  struct watchpoint *w = (struct watchpoint *) b;

  /* Continuable hardware watchpoints are treated as non-existent if the
     reason we stopped wasn't a hardware watchpoint (we didn't stop on
     some data address).  Otherwise gdb won't stop on a break instruction
     in the code (not from a breakpoint) when a hardware watchpoint has
     been defined.  Also skip watchpoints which we know did not trigger
     (did not match the data address).  */
  if (is_hardware_watchpoint (b)
      && w->watchpoint_triggered == watch_triggered_no)
    return 0;

  return 1;
}

static void
check_status_watchpoint (bpstat bs)
{
  gdb_assert (is_watchpoint (bs->breakpoint_at));

  bpstat_check_watchpoint (bs);
}

/* Implement the "resources_needed" breakpoint_ops method for
   hardware watchpoints.  */

static int
resources_needed_watchpoint (const struct bp_location *bl)
{
  struct watchpoint *w = (struct watchpoint *) bl->owner;
  int length = w->exact? 1 : bl->length;

  return target_region_ok_for_hw_watchpoint (bl->address, length);
}

/* Implement the "works_in_software_mode" breakpoint_ops method for
   hardware watchpoints.  */

static int
works_in_software_mode_watchpoint (const struct breakpoint *b)
{
  /* Read and access watchpoints only work with hardware support.  */
  return b->type == bp_watchpoint || b->type == bp_hardware_watchpoint;
}

static enum print_stop_action
print_it_watchpoint (bpstat bs)
{
  struct breakpoint *b;
  enum print_stop_action result;
  struct watchpoint *w;
  struct ui_out *uiout = current_uiout;

  gdb_assert (bs->bp_location_at != NULL);

  b = bs->breakpoint_at;
  w = (struct watchpoint *) b;

  annotate_watchpoint (b->number);
  maybe_print_thread_hit_breakpoint (uiout);

  string_file stb;

  gdb::optional<ui_out_emit_tuple> tuple_emitter;
  switch (b->type)
    {
    case bp_watchpoint:
    case bp_hardware_watchpoint:
      if (uiout->is_mi_like_p ())
	uiout->field_string
	  ("reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER));
      mention (b);
      tuple_emitter.emplace (uiout, "value");
      uiout->text ("\nOld value = ");
      watchpoint_value_print (bs->old_val.get (), &stb);
      uiout->field_stream ("old", stb);
      uiout->text ("\nNew value = ");
      watchpoint_value_print (w->val.get (), &stb);
      uiout->field_stream ("new", stb);
      uiout->text ("\n");
      /* More than one watchpoint may have been triggered.  */
      result = PRINT_UNKNOWN;
      break;

    case bp_read_watchpoint:
      if (uiout->is_mi_like_p ())
	uiout->field_string
	  ("reason", async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER));
      mention (b);
      tuple_emitter.emplace (uiout, "value");
      uiout->text ("\nValue = ");
      watchpoint_value_print (w->val.get (), &stb);
      uiout->field_stream ("value", stb);
      uiout->text ("\n");
      result = PRINT_UNKNOWN;
      break;

    case bp_access_watchpoint:
      if (bs->old_val != NULL)
	{
	  if (uiout->is_mi_like_p ())
	    uiout->field_string
	      ("reason",
	       async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER));
	  mention (b);
	  tuple_emitter.emplace (uiout, "value");
	  uiout->text ("\nOld value = ");
	  watchpoint_value_print (bs->old_val.get (), &stb);
	  uiout->field_stream ("old", stb);
	  uiout->text ("\nNew value = ");
	}
      else
	{
	  mention (b);
	  if (uiout->is_mi_like_p ())
	    uiout->field_string
	      ("reason",
	       async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER));
	  tuple_emitter.emplace (uiout, "value");
	  uiout->text ("\nValue = ");
	}
      watchpoint_value_print (w->val.get (), &stb);
      uiout->field_stream ("new", stb);
      uiout->text ("\n");
      result = PRINT_UNKNOWN;
      break;
    default:
      result = PRINT_UNKNOWN;
    }

  return result;
}

/* Implement the "print_mention" breakpoint_ops method for hardware
   watchpoints.  */

static void
print_mention_watchpoint (struct breakpoint *b)
{
  struct watchpoint *w = (struct watchpoint *) b;
  struct ui_out *uiout = current_uiout;
  const char *tuple_name;

  switch (b->type)
    {
    case bp_watchpoint:
      uiout->text ("Watchpoint ");
      tuple_name = "wpt";
      break;
    case bp_hardware_watchpoint:
      uiout->text ("Hardware watchpoint ");
      tuple_name = "wpt";
      break;
    case bp_read_watchpoint:
      uiout->text ("Hardware read watchpoint ");
      tuple_name = "hw-rwpt";
      break;
    case bp_access_watchpoint:
      uiout->text ("Hardware access (read/write) watchpoint ");
      tuple_name = "hw-awpt";
      break;
    default:
      internal_error (__FILE__, __LINE__,
		      _("Invalid hardware watchpoint type."));
    }

  ui_out_emit_tuple tuple_emitter (uiout, tuple_name);
  uiout->field_int ("number", b->number);
  uiout->text (": ");
  uiout->field_string ("exp", w->exp_string);
}

/* Implement the "print_recreate" breakpoint_ops method for
   watchpoints.  */

static void
print_recreate_watchpoint (struct breakpoint *b, struct ui_file *fp)
{
  struct watchpoint *w = (struct watchpoint *) b;

  switch (b->type)
    {
    case bp_watchpoint:
    case bp_hardware_watchpoint:
      fprintf_unfiltered (fp, "watch");
      break;
    case bp_read_watchpoint:
      fprintf_unfiltered (fp, "rwatch");
      break;
    case bp_access_watchpoint:
      fprintf_unfiltered (fp, "awatch");
      break;
    default:
      internal_error (__FILE__, __LINE__,
		      _("Invalid watchpoint type."));
    }

  fprintf_unfiltered (fp, " %s", w->exp_string);
  print_recreate_thread (b, fp);
}

/* Implement the "explains_signal" breakpoint_ops method for
   watchpoints.  */

static int
explains_signal_watchpoint (struct breakpoint *b, enum gdb_signal sig)
{
  /* A software watchpoint cannot cause a signal other than
     GDB_SIGNAL_TRAP.  */
  if (b->type == bp_watchpoint && sig != GDB_SIGNAL_TRAP)
    return 0;

  return 1;
}

/* The breakpoint_ops structure to be used in hardware watchpoints.  */

static struct breakpoint_ops watchpoint_breakpoint_ops;

/* Implement the "insert" breakpoint_ops method for
   masked hardware watchpoints.  */

static int
insert_masked_watchpoint (struct bp_location *bl)
{
  struct watchpoint *w = (struct watchpoint *) bl->owner;

  return target_insert_mask_watchpoint (bl->address, w->hw_wp_mask,
					bl->watchpoint_type);
}

/* Implement the "remove" breakpoint_ops method for
   masked hardware watchpoints.  */

static int
remove_masked_watchpoint (struct bp_location *bl, enum remove_bp_reason reason)
{
  struct watchpoint *w = (struct watchpoint *) bl->owner;

  return target_remove_mask_watchpoint (bl->address, w->hw_wp_mask,
				        bl->watchpoint_type);
}

/* Implement the "resources_needed" breakpoint_ops method for
   masked hardware watchpoints.  */

static int
resources_needed_masked_watchpoint (const struct bp_location *bl)
{
  struct watchpoint *w = (struct watchpoint *) bl->owner;

  return target_masked_watch_num_registers (bl->address, w->hw_wp_mask);
}

/* Implement the "works_in_software_mode" breakpoint_ops method for
   masked hardware watchpoints.  */

static int
works_in_software_mode_masked_watchpoint (const struct breakpoint *b)
{
  return 0;
}

/* Implement the "print_it" breakpoint_ops method for
   masked hardware watchpoints.  */

static enum print_stop_action
print_it_masked_watchpoint (bpstat bs)
{
  struct breakpoint *b = bs->breakpoint_at;
  struct ui_out *uiout = current_uiout;

  /* Masked watchpoints have only one location.  */
  gdb_assert (b->loc && b->loc->next == NULL);

  annotate_watchpoint (b->number);
  maybe_print_thread_hit_breakpoint (uiout);

  switch (b->type)
    {
    case bp_hardware_watchpoint:
      if (uiout->is_mi_like_p ())
	uiout->field_string
	  ("reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER));
      break;

    case bp_read_watchpoint:
      if (uiout->is_mi_like_p ())
	uiout->field_string
	  ("reason", async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER));
      break;

    case bp_access_watchpoint:
      if (uiout->is_mi_like_p ())
	uiout->field_string
	  ("reason",
	   async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER));
      break;
    default:
      internal_error (__FILE__, __LINE__,
		      _("Invalid hardware watchpoint type."));
    }

  mention (b);
  uiout->text (_("\n\
Check the underlying instruction at PC for the memory\n\
address and value which triggered this watchpoint.\n"));
  uiout->text ("\n");

  /* More than one watchpoint may have been triggered.  */
  return PRINT_UNKNOWN;
}

/* Implement the "print_one_detail" breakpoint_ops method for
   masked hardware watchpoints.  */

static void
print_one_detail_masked_watchpoint (const struct breakpoint *b,
				    struct ui_out *uiout)
{
  struct watchpoint *w = (struct watchpoint *) b;

  /* Masked watchpoints have only one location.  */
  gdb_assert (b->loc && b->loc->next == NULL);

  uiout->text ("\tmask ");
  uiout->field_core_addr ("mask", b->loc->gdbarch, w->hw_wp_mask);
  uiout->text ("\n");
}

/* Implement the "print_mention" breakpoint_ops method for
   masked hardware watchpoints.  */

static void
print_mention_masked_watchpoint (struct breakpoint *b)
{
  struct watchpoint *w = (struct watchpoint *) b;
  struct ui_out *uiout = current_uiout;
  const char *tuple_name;

  switch (b->type)
    {
    case bp_hardware_watchpoint:
      uiout->text ("Masked hardware watchpoint ");
      tuple_name = "wpt";
      break;
    case bp_read_watchpoint:
      uiout->text ("Masked hardware read watchpoint ");
      tuple_name = "hw-rwpt";
      break;
    case bp_access_watchpoint:
      uiout->text ("Masked hardware access (read/write) watchpoint ");
      tuple_name = "hw-awpt";
      break;
    default:
      internal_error (__FILE__, __LINE__,
		      _("Invalid hardware watchpoint type."));
    }

  ui_out_emit_tuple tuple_emitter (uiout, tuple_name);
  uiout->field_int ("number", b->number);
  uiout->text (": ");
  uiout->field_string ("exp", w->exp_string);
}

/* Implement the "print_recreate" breakpoint_ops method for
   masked hardware watchpoints.  */

static void
print_recreate_masked_watchpoint (struct breakpoint *b, struct ui_file *fp)
{
  struct watchpoint *w = (struct watchpoint *) b;
  char tmp[40];

  switch (b->type)
    {
    case bp_hardware_watchpoint:
      fprintf_unfiltered (fp, "watch");
      break;
    case bp_read_watchpoint:
      fprintf_unfiltered (fp, "rwatch");
      break;
    case bp_access_watchpoint:
      fprintf_unfiltered (fp, "awatch");
      break;
    default:
      internal_error (__FILE__, __LINE__,
		      _("Invalid hardware watchpoint type."));
    }

  sprintf_vma (tmp, w->hw_wp_mask);
  fprintf_unfiltered (fp, " %s mask 0x%s", w->exp_string, tmp);
  print_recreate_thread (b, fp);
}

/* The breakpoint_ops structure to be used in masked hardware watchpoints.  */

static struct breakpoint_ops masked_watchpoint_breakpoint_ops;

/* Tell whether the given watchpoint is a masked hardware watchpoint.  */

static int
is_masked_watchpoint (const struct breakpoint *b)
{
  return b->ops == &masked_watchpoint_breakpoint_ops;
}

/* accessflag:  hw_write:  watch write, 
                hw_read:   watch read, 
		hw_access: watch access (read or write) */
static void
watch_command_1 (const char *arg, int accessflag, int from_tty,
		 int just_location, int internal)
{
  struct breakpoint *scope_breakpoint = NULL;
  const struct block *exp_valid_block = NULL, *cond_exp_valid_block = NULL;
  struct value *mark, *result;
  int saved_bitpos = 0, saved_bitsize = 0;
  const char *exp_start = NULL;
  const char *exp_end = NULL;
  const char *tok, *end_tok;
  int toklen = -1;
  const char *cond_start = NULL;
  const char *cond_end = NULL;
  enum bptype bp_type;
  int thread = -1;
  int pc = 0;
  /* Flag to indicate whether we are going to use masks for
     the hardware watchpoint.  */
  int use_mask = 0;
  CORE_ADDR mask = 0;

  /* Make sure that we actually have parameters to parse.  */
  if (arg != NULL && arg[0] != '\0')
    {
      const char *value_start;

      exp_end = arg + strlen (arg);

      /* Look for "parameter value" pairs at the end
	 of the arguments string.  */
      for (tok = exp_end - 1; tok > arg; tok--)
	{
	  /* Skip whitespace at the end of the argument list.  */
	  while (tok > arg && (*tok == ' ' || *tok == '\t'))
	    tok--;

	  /* Find the beginning of the last token.
	     This is the value of the parameter.  */
	  while (tok > arg && (*tok != ' ' && *tok != '\t'))
	    tok--;
	  value_start = tok + 1;

	  /* Skip whitespace.  */
	  while (tok > arg && (*tok == ' ' || *tok == '\t'))
	    tok--;

	  end_tok = tok;

	  /* Find the beginning of the second to last token.
	     This is the parameter itself.  */
	  while (tok > arg && (*tok != ' ' && *tok != '\t'))
	    tok--;
	  tok++;
	  toklen = end_tok - tok + 1;

	  if (toklen == 6 && startswith (tok, "thread"))
	    {
	      struct thread_info *thr;
	      /* At this point we've found a "thread" token, which means
		 the user is trying to set a watchpoint that triggers
		 only in a specific thread.  */
	      const char *endp;

	      if (thread != -1)
		error(_("You can specify only one thread."));

	      /* Extract the thread ID from the next token.  */
	      thr = parse_thread_id (value_start, &endp);

	      /* Check if the user provided a valid thread ID.  */
	      if (*endp != ' ' && *endp != '\t' && *endp != '\0')
		invalid_thread_id_error (value_start);

	      thread = thr->global_num;
	    }
	  else if (toklen == 4 && startswith (tok, "mask"))
	    {
	      /* We've found a "mask" token, which means the user wants to
		 create a hardware watchpoint that is going to have the mask
		 facility.  */
	      struct value *mask_value, *mark;

	      if (use_mask)
		error(_("You can specify only one mask."));

	      use_mask = just_location = 1;

	      mark = value_mark ();
	      mask_value = parse_to_comma_and_eval (&value_start);
	      mask = value_as_address (mask_value);
	      value_free_to_mark (mark);
	    }
	  else
	    /* We didn't recognize what we found.  We should stop here.  */
	    break;

	  /* Truncate the string and get rid of the "parameter value" pair before
	     the arguments string is parsed by the parse_exp_1 function.  */
	  exp_end = tok;
	}
    }
  else
    exp_end = arg;

  /* Parse the rest of the arguments.  From here on out, everything
     is in terms of a newly allocated string instead of the original
     ARG.  */
  innermost_block.reset ();
  std::string expression (arg, exp_end - arg);
  exp_start = arg = expression.c_str ();
  expression_up exp = parse_exp_1 (&arg, 0, 0, 0);
  exp_end = arg;
  /* Remove trailing whitespace from the expression before saving it.
     This makes the eventual display of the expression string a bit
     prettier.  */
  while (exp_end > exp_start && (exp_end[-1] == ' ' || exp_end[-1] == '\t'))
    --exp_end;

  /* Checking if the expression is not constant.  */
  if (watchpoint_exp_is_const (exp.get ()))
    {
      int len;

      len = exp_end - exp_start;
      while (len > 0 && isspace (exp_start[len - 1]))
	len--;
      error (_("Cannot watch constant value `%.*s'."), len, exp_start);
    }

  exp_valid_block = innermost_block.block ();
  mark = value_mark ();
  struct value *val_as_value = nullptr;
  fetch_subexp_value (exp.get (), &pc, &val_as_value, &result, NULL,
		      just_location);

  if (val_as_value != NULL && just_location)
    {
      saved_bitpos = value_bitpos (val_as_value);
      saved_bitsize = value_bitsize (val_as_value);
    }

  value_ref_ptr val;
  if (just_location)
    {
      int ret;

      exp_valid_block = NULL;
      val = release_value (value_addr (result));
      value_free_to_mark (mark);

      if (use_mask)
	{
	  ret = target_masked_watch_num_registers (value_as_address (val.get ()),
						   mask);
	  if (ret == -1)
	    error (_("This target does not support masked watchpoints."));
	  else if (ret == -2)
	    error (_("Invalid mask or memory region."));
	}
    }
  else if (val_as_value != NULL)
    val = release_value (val_as_value);

  tok = skip_spaces (arg);
  end_tok = skip_to_space (tok);

  toklen = end_tok - tok;
  if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
    {
      innermost_block.reset ();
      tok = cond_start = end_tok + 1;
      parse_exp_1 (&tok, 0, 0, 0);

      /* The watchpoint expression may not be local, but the condition
	 may still be.  E.g.: `watch global if local > 0'.  */
      cond_exp_valid_block = innermost_block.block ();

      cond_end = tok;
    }
  if (*tok)
    error (_("Junk at end of command."));

  frame_info *wp_frame = block_innermost_frame (exp_valid_block);

  /* Save this because create_internal_breakpoint below invalidates
     'wp_frame'.  */
  frame_id watchpoint_frame = get_frame_id (wp_frame);

  /* If the expression is "local", then set up a "watchpoint scope"
     breakpoint at the point where we've left the scope of the watchpoint
     expression.  Create the scope breakpoint before the watchpoint, so
     that we will encounter it first in bpstat_stop_status.  */
  if (exp_valid_block != NULL && wp_frame != NULL)
    {
      frame_id caller_frame_id = frame_unwind_caller_id (wp_frame);

      if (frame_id_p (caller_frame_id))
	{
	  gdbarch *caller_arch = frame_unwind_caller_arch (wp_frame);
	  CORE_ADDR caller_pc = frame_unwind_caller_pc (wp_frame);

 	  scope_breakpoint
	    = create_internal_breakpoint (caller_arch, caller_pc,
					  bp_watchpoint_scope,
					  &momentary_breakpoint_ops);

	  /* create_internal_breakpoint could invalidate WP_FRAME.  */
	  wp_frame = NULL;

	  scope_breakpoint->enable_state = bp_enabled;

	  /* Automatically delete the breakpoint when it hits.  */
	  scope_breakpoint->disposition = disp_del;

	  /* Only break in the proper frame (help with recursion).  */
	  scope_breakpoint->frame_id = caller_frame_id;

	  /* Set the address at which we will stop.  */
	  scope_breakpoint->loc->gdbarch = caller_arch;
	  scope_breakpoint->loc->requested_address = caller_pc;
	  scope_breakpoint->loc->address
	    = adjust_breakpoint_address (scope_breakpoint->loc->gdbarch,
					 scope_breakpoint->loc->requested_address,
					 scope_breakpoint->type);
	}
    }

  /* Now set up the breakpoint.  We create all watchpoints as hardware
     watchpoints here even if hardware watchpoints are turned off, a call
     to update_watchpoint later in this function will cause the type to
     drop back to bp_watchpoint (software watchpoint) if required.  */

  if (accessflag == hw_read)
    bp_type = bp_read_watchpoint;
  else if (accessflag == hw_access)
    bp_type = bp_access_watchpoint;
  else
    bp_type = bp_hardware_watchpoint;

  std::unique_ptr<watchpoint> w (new watchpoint ());

  if (use_mask)
    init_raw_breakpoint_without_location (w.get (), NULL, bp_type,
					  &masked_watchpoint_breakpoint_ops);
  else
    init_raw_breakpoint_without_location (w.get (), NULL, bp_type,
					  &watchpoint_breakpoint_ops);
  w->thread = thread;
  w->disposition = disp_donttouch;
  w->pspace = current_program_space;
  w->exp = std::move (exp);
  w->exp_valid_block = exp_valid_block;
  w->cond_exp_valid_block = cond_exp_valid_block;
  if (just_location)
    {
      struct type *t = value_type (val.get ());
      CORE_ADDR addr = value_as_address (val.get ());

      w->exp_string_reparse
	= current_language->la_watch_location_expression (t, addr).release ();

      w->exp_string = xstrprintf ("-location %.*s",
				  (int) (exp_end - exp_start), exp_start);
    }
  else
    w->exp_string = savestring (exp_start, exp_end - exp_start);

  if (use_mask)
    {
      w->hw_wp_mask = mask;
    }
  else
    {
      w->val = val;
      w->val_bitpos = saved_bitpos;
      w->val_bitsize = saved_bitsize;
      w->val_valid = 1;
    }

  if (cond_start)
    w->cond_string = savestring (cond_start, cond_end - cond_start);
  else
    w->cond_string = 0;

  if (frame_id_p (watchpoint_frame))
    {
      w->watchpoint_frame = watchpoint_frame;
      w->watchpoint_thread = inferior_ptid;
    }
  else
    {
      w->watchpoint_frame = null_frame_id;
      w->watchpoint_thread = null_ptid;
    }

  if (scope_breakpoint != NULL)
    {
      /* The scope breakpoint is related to the watchpoint.  We will
	 need to act on them together.  */
      w->related_breakpoint = scope_breakpoint;
      scope_breakpoint->related_breakpoint = w.get ();
    }

  if (!just_location)
    value_free_to_mark (mark);

  /* Finally update the new watchpoint.  This creates the locations
     that should be inserted.  */
  update_watchpoint (w.get (), 1);

  install_breakpoint (internal, std::move (w), 1);
}

/* Return count of debug registers needed to watch the given expression.
   If the watchpoint cannot be handled in hardware return zero.  */

static int
can_use_hardware_watchpoint (struct value *v)
{
  int found_memory_cnt = 0;
  struct value *head = v;

  /* Did the user specifically forbid us to use hardware watchpoints? */
  if (!can_use_hw_watchpoints)
    return 0;

  /* Make sure that the value of the expression depends only upon
     memory contents, and values computed from them within GDB.  If we
     find any register references or function calls, we can't use a
     hardware watchpoint.

     The idea here is that evaluating an expression generates a series
     of values, one holding the value of every subexpression.  (The
     expression a*b+c has five subexpressions: a, b, a*b, c, and
     a*b+c.)  GDB's values hold almost enough information to establish
     the criteria given above --- they identify memory lvalues,
     register lvalues, computed values, etcetera.  So we can evaluate
     the expression, and then scan the chain of values that leaves
     behind to decide whether we can detect any possible change to the
     expression's final value using only hardware watchpoints.

     However, I don't think that the values returned by inferior
     function calls are special in any way.  So this function may not
     notice that an expression involving an inferior function call
     can't be watched with hardware watchpoints.  FIXME.  */
  for (; v; v = value_next (v))
    {
      if (VALUE_LVAL (v) == lval_memory)
	{
	  if (v != head && value_lazy (v))
	    /* A lazy memory lvalue in the chain is one that GDB never
	       needed to fetch; we either just used its address (e.g.,
	       `a' in `a.b') or we never needed it at all (e.g., `a'
	       in `a,b').  This doesn't apply to HEAD; if that is
	       lazy then it was not readable, but watch it anyway.  */
	    ;
	  else
	    {
	      /* Ahh, memory we actually used!  Check if we can cover
                 it with hardware watchpoints.  */
	      struct type *vtype = check_typedef (value_type (v));

	      /* We only watch structs and arrays if user asked for it
		 explicitly, never if they just happen to appear in a
		 middle of some value chain.  */
	      if (v == head
		  || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
		      && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
		{
		  CORE_ADDR vaddr = value_address (v);
		  int len;
		  int num_regs;

		  len = (target_exact_watchpoints
			 && is_scalar_type_recursive (vtype))?
		    1 : TYPE_LENGTH (value_type (v));

		  num_regs = target_region_ok_for_hw_watchpoint (vaddr, len);
		  if (!num_regs)
		    return 0;
		  else
		    found_memory_cnt += num_regs;
		}
	    }
	}
      else if (VALUE_LVAL (v) != not_lval
	       && deprecated_value_modifiable (v) == 0)
	return 0;	/* These are values from the history (e.g., $1).  */
      else if (VALUE_LVAL (v) == lval_register)
	return 0;	/* Cannot watch a register with a HW watchpoint.  */
    }

  /* The expression itself looks suitable for using a hardware
     watchpoint, but give the target machine a chance to reject it.  */
  return found_memory_cnt;
}

void
watch_command_wrapper (const char *arg, int from_tty, int internal)
{
  watch_command_1 (arg, hw_write, from_tty, 0, internal);
}

/* A helper function that looks for the "-location" argument and then
   calls watch_command_1.  */

static void
watch_maybe_just_location (const char *arg, int accessflag, int from_tty)
{
  int just_location = 0;

  if (arg
      && (check_for_argument (&arg, "-location", sizeof ("-location") - 1)
	  || check_for_argument (&arg, "-l", sizeof ("-l") - 1)))
    {
      arg = skip_spaces (arg);
      just_location = 1;
    }

  watch_command_1 (arg, accessflag, from_tty, just_location, 0);
}

static void
watch_command (const char *arg, int from_tty)
{
  watch_maybe_just_location (arg, hw_write, from_tty);
}

void
rwatch_command_wrapper (const char *arg, int from_tty, int internal)
{
  watch_command_1 (arg, hw_read, from_tty, 0, internal);
}

static void
rwatch_command (const char *arg, int from_tty)
{
  watch_maybe_just_location (arg, hw_read, from_tty);
}

void
awatch_command_wrapper (const char *arg, int from_tty, int internal)
{
  watch_command_1 (arg, hw_access, from_tty, 0, internal);
}

static void
awatch_command (const char *arg, int from_tty)
{
  watch_maybe_just_location (arg, hw_access, from_tty);
}


/* Data for the FSM that manages the until(location)/advance commands
   in infcmd.c.  Here because it uses the mechanisms of
   breakpoints.  */

struct until_break_fsm
{
  /* The base class.  */
  struct thread_fsm thread_fsm;

  /* The thread that as current when the command was executed.  */
  int thread;

  /* The breakpoint set at the destination location.  */
  struct breakpoint *location_breakpoint;

  /* Breakpoint set at the return address in the caller frame.  May be
     NULL.  */
  struct breakpoint *caller_breakpoint;
};

static void until_break_fsm_clean_up (struct thread_fsm *self,
				      struct thread_info *thread);
static int until_break_fsm_should_stop (struct thread_fsm *self,
					struct thread_info *thread);
static enum async_reply_reason
  until_break_fsm_async_reply_reason (struct thread_fsm *self);

/* until_break_fsm's vtable.  */

static struct thread_fsm_ops until_break_fsm_ops =
{
  NULL, /* dtor */
  until_break_fsm_clean_up,
  until_break_fsm_should_stop,
  NULL, /* return_value */
  until_break_fsm_async_reply_reason,
};

/* Allocate a new until_break_command_fsm.  */

static struct until_break_fsm *
new_until_break_fsm (struct interp *cmd_interp, int thread,
		     breakpoint_up &&location_breakpoint,
		     breakpoint_up &&caller_breakpoint)
{
  struct until_break_fsm *sm;

  sm = XCNEW (struct until_break_fsm);
  thread_fsm_ctor (&sm->thread_fsm, &until_break_fsm_ops, cmd_interp);

  sm->thread = thread;
  sm->location_breakpoint = location_breakpoint.release ();
  sm->caller_breakpoint = caller_breakpoint.release ();

  return sm;
}

/* Implementation of the 'should_stop' FSM method for the
   until(location)/advance commands.  */

static int
until_break_fsm_should_stop (struct thread_fsm *self,
			     struct thread_info *tp)
{
  struct until_break_fsm *sm = (struct until_break_fsm *) self;

  if (bpstat_find_breakpoint (tp->control.stop_bpstat,
			      sm->location_breakpoint) != NULL
      || (sm->caller_breakpoint != NULL
	  && bpstat_find_breakpoint (tp->control.stop_bpstat,
				     sm->caller_breakpoint) != NULL))
    thread_fsm_set_finished (self);

  return 1;
}

/* Implementation of the 'clean_up' FSM method for the
   until(location)/advance commands.  */

static void
until_break_fsm_clean_up (struct thread_fsm *self,
			  struct thread_info *thread)
{
  struct until_break_fsm *sm = (struct until_break_fsm *) self;

  /* Clean up our temporary breakpoints.  */
  if (sm->location_breakpoint != NULL)
    {
      delete_breakpoint (sm->location_breakpoint);
      sm->location_breakpoint = NULL;
    }
  if (sm->caller_breakpoint != NULL)
    {
      delete_breakpoint (sm->caller_breakpoint);
      sm->caller_breakpoint = NULL;
    }
  delete_longjmp_breakpoint (sm->thread);
}

/* Implementation of the 'async_reply_reason' FSM method for the
   until(location)/advance commands.  */

static enum async_reply_reason
until_break_fsm_async_reply_reason (struct thread_fsm *self)
{
  return EXEC_ASYNC_LOCATION_REACHED;
}

void
until_break_command (const char *arg, int from_tty, int anywhere)
{
  struct frame_info *frame;
  struct gdbarch *frame_gdbarch;
  struct frame_id stack_frame_id;
  struct frame_id caller_frame_id;
  struct cleanup *old_chain;
  int thread;
  struct thread_info *tp;
  struct until_break_fsm *sm;

  clear_proceed_status (0);

  /* Set a breakpoint where the user wants it and at return from
     this function.  */

  event_location_up location = string_to_event_location (&arg, current_language);

  std::vector<symtab_and_line> sals
    = (last_displayed_sal_is_valid ()
       ? decode_line_1 (location.get (), DECODE_LINE_FUNFIRSTLINE, NULL,
			get_last_displayed_symtab (),
			get_last_displayed_line ())
       : decode_line_1 (location.get (), DECODE_LINE_FUNFIRSTLINE,
			NULL, (struct symtab *) NULL, 0));

  if (sals.size () != 1)
    error (_("Couldn't get information on specified line."));

  symtab_and_line &sal = sals[0];

  if (*arg)
    error (_("Junk at end of arguments."));

  resolve_sal_pc (&sal);

  tp = inferior_thread ();
  thread = tp->global_num;

  old_chain = make_cleanup (null_cleanup, NULL);

  /* Note linespec handling above invalidates the frame chain.
     Installing a breakpoint also invalidates the frame chain (as it
     may need to switch threads), so do any frame handling before
     that.  */

  frame = get_selected_frame (NULL);
  frame_gdbarch = get_frame_arch (frame);
  stack_frame_id = get_stack_frame_id (frame);
  caller_frame_id = frame_unwind_caller_id (frame);

  /* Keep within the current frame, or in frames called by the current
     one.  */

  breakpoint_up caller_breakpoint;
  if (frame_id_p (caller_frame_id))
    {
      struct symtab_and_line sal2;
      struct gdbarch *caller_gdbarch;

      sal2 = find_pc_line (frame_unwind_caller_pc (frame), 0);
      sal2.pc = frame_unwind_caller_pc (frame);
      caller_gdbarch = frame_unwind_caller_arch (frame);
      caller_breakpoint = set_momentary_breakpoint (caller_gdbarch,
						    sal2,
						    caller_frame_id,
						    bp_until);

      set_longjmp_breakpoint (tp, caller_frame_id);
      make_cleanup (delete_longjmp_breakpoint_cleanup, &thread);
    }

  /* set_momentary_breakpoint could invalidate FRAME.  */
  frame = NULL;

  breakpoint_up location_breakpoint;
  if (anywhere)
    /* If the user told us to continue until a specified location,
       we don't specify a frame at which we need to stop.  */
    location_breakpoint = set_momentary_breakpoint (frame_gdbarch, sal,
						    null_frame_id, bp_until);
  else
    /* Otherwise, specify the selected frame, because we want to stop
       only at the very same frame.  */
    location_breakpoint = set_momentary_breakpoint (frame_gdbarch, sal,
						    stack_frame_id, bp_until);

  sm = new_until_break_fsm (command_interp (), tp->global_num,
			    std::move (location_breakpoint),
			    std::move (caller_breakpoint));
  tp->thread_fsm = &sm->thread_fsm;

  discard_cleanups (old_chain);

  proceed (-1, GDB_SIGNAL_DEFAULT);
}

/* This function attempts to parse an optional "if <cond>" clause
   from the arg string.  If one is not found, it returns NULL.

   Else, it returns a pointer to the condition string.  (It does not
   attempt to evaluate the string against a particular block.)  And,
   it updates arg to point to the first character following the parsed
   if clause in the arg string.  */

const char *
ep_parse_optional_if_clause (const char **arg)
{
  const char *cond_string;

  if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
    return NULL;

  /* Skip the "if" keyword.  */
  (*arg) += 2;

  /* Skip any extra leading whitespace, and record the start of the
     condition string.  */
  *arg = skip_spaces (*arg);
  cond_string = *arg;

  /* Assume that the condition occupies the remainder of the arg
     string.  */
  (*arg) += strlen (cond_string);

  return cond_string;
}

/* Commands to deal with catching events, such as signals, exceptions,
   process start/exit, etc.  */

typedef enum
{
  catch_fork_temporary, catch_vfork_temporary,
  catch_fork_permanent, catch_vfork_permanent
}
catch_fork_kind;

static void
catch_fork_command_1 (const char *arg, int from_tty,
		      struct cmd_list_element *command)
{
  struct gdbarch *gdbarch = get_current_arch ();
  const char *cond_string = NULL;
  catch_fork_kind fork_kind;
  int tempflag;

  fork_kind = (catch_fork_kind) (uintptr_t) get_cmd_context (command);
  tempflag = (fork_kind == catch_fork_temporary
	      || fork_kind == catch_vfork_temporary);

  if (!arg)
    arg = "";
  arg = skip_spaces (arg);

  /* The allowed syntax is:
     catch [v]fork
     catch [v]fork if <cond>

     First, check if there's an if clause.  */
  cond_string = ep_parse_optional_if_clause (&arg);

  if ((*arg != '\0') && !isspace (*arg))
    error (_("Junk at end of arguments."));

  /* If this target supports it, create a fork or vfork catchpoint
     and enable reporting of such events.  */
  switch (fork_kind)
    {
    case catch_fork_temporary:
    case catch_fork_permanent:
      create_fork_vfork_event_catchpoint (gdbarch, tempflag, cond_string,
                                          &catch_fork_breakpoint_ops);
      break;
    case catch_vfork_temporary:
    case catch_vfork_permanent:
      create_fork_vfork_event_catchpoint (gdbarch, tempflag, cond_string,
                                          &catch_vfork_breakpoint_ops);
      break;
    default:
      error (_("unsupported or unknown fork kind; cannot catch it"));
      break;
    }
}

static void
catch_exec_command_1 (const char *arg, int from_tty,
		      struct cmd_list_element *command)
{
  struct gdbarch *gdbarch = get_current_arch ();
  int tempflag;
  const char *cond_string = NULL;

  tempflag = get_cmd_context (command) == CATCH_TEMPORARY;

  if (!arg)
    arg = "";
  arg = skip_spaces (arg);

  /* The allowed syntax is:
     catch exec
     catch exec if <cond>

     First, check if there's an if clause.  */
  cond_string = ep_parse_optional_if_clause (&arg);

  if ((*arg != '\0') && !isspace (*arg))
    error (_("Junk at end of arguments."));

  std::unique_ptr<exec_catchpoint> c (new exec_catchpoint ());
  init_catchpoint (c.get (), gdbarch, tempflag, cond_string,
		   &catch_exec_breakpoint_ops);
  c->exec_pathname = NULL;

  install_breakpoint (0, std::move (c), 1);
}

void
init_ada_exception_breakpoint (struct breakpoint *b,
			       struct gdbarch *gdbarch,
			       struct symtab_and_line sal,
			       const char *addr_string,
			       const struct breakpoint_ops *ops,
			       int tempflag,
			       int enabled,
			       int from_tty)
{
  if (from_tty)
    {
      struct gdbarch *loc_gdbarch = get_sal_arch (sal);
      if (!loc_gdbarch)
	loc_gdbarch = gdbarch;

      describe_other_breakpoints (loc_gdbarch,
				  sal.pspace, sal.pc, sal.section, -1);
      /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
         version for exception catchpoints, because two catchpoints
         used for different exception names will use the same address.
         In this case, a "breakpoint ... also set at..." warning is
         unproductive.  Besides, the warning phrasing is also a bit
         inappropriate, we should use the word catchpoint, and tell
         the user what type of catchpoint it is.  The above is good
         enough for now, though.  */
    }

  init_raw_breakpoint (b, gdbarch, sal, bp_breakpoint, ops);

  b->enable_state = enabled ? bp_enabled : bp_disabled;
  b->disposition = tempflag ? disp_del : disp_donttouch;
  b->location = string_to_event_location (&addr_string,
					  language_def (language_ada));
  b->language = language_ada;
}

static void
catch_command (const char *arg, int from_tty)
{
  error (_("Catch requires an event name."));
}


static void
tcatch_command (const char *arg, int from_tty)
{
  error (_("Catch requires an event name."));
}

/* Compare two breakpoints and return a strcmp-like result.  */

static int
compare_breakpoints (const breakpoint *a, const breakpoint *b)
{
  uintptr_t ua = (uintptr_t) a;
  uintptr_t ub = (uintptr_t) b;

  if (a->number < b->number)
    return -1;
  else if (a->number > b->number)
    return 1;

  /* Now sort by address, in case we see, e..g, two breakpoints with
     the number 0.  */
  if (ua < ub)
    return -1;
  return ua > ub ? 1 : 0;
}

/* Delete breakpoints by address or line.  */

static void
clear_command (const char *arg, int from_tty)
{
  struct breakpoint *b;
  int default_match;

  std::vector<symtab_and_line> decoded_sals;
  symtab_and_line last_sal;
  gdb::array_view<symtab_and_line> sals;
  if (arg)
    {
      decoded_sals
	= decode_line_with_current_source (arg,
					   (DECODE_LINE_FUNFIRSTLINE
					    | DECODE_LINE_LIST_MODE));
      default_match = 0;
      sals = decoded_sals;
    }
  else
    {
      /* Set sal's line, symtab, pc, and pspace to the values
	 corresponding to the last call to print_frame_info.  If the
	 codepoint is not valid, this will set all the fields to 0.  */
      last_sal = get_last_displayed_sal ();
      if (last_sal.symtab == 0)
	error (_("No source file specified."));

      default_match = 1;
      sals = last_sal;
    }

  /* We don't call resolve_sal_pc here.  That's not as bad as it
     seems, because all existing breakpoints typically have both
     file/line and pc set.  So, if clear is given file/line, we can
     match this to existing breakpoint without obtaining pc at all.

     We only support clearing given the address explicitly 
     present in breakpoint table.  Say, we've set breakpoint 
     at file:line.  There were several PC values for that file:line,
     due to optimization, all in one block.

     We've picked one PC value.  If "clear" is issued with another
     PC corresponding to the same file:line, the breakpoint won't
     be cleared.  We probably can still clear the breakpoint, but 
     since the other PC value is never presented to user, user
     can only find it by guessing, and it does not seem important
     to support that.  */

  /* For each line spec given, delete bps which correspond to it.  Do
     it in two passes, solely to preserve the current behavior that
     from_tty is forced true if we delete more than one
     breakpoint.  */

  std::vector<struct breakpoint *> found;
  for (const auto &sal : sals)
    {
      const char *sal_fullname;

      /* If exact pc given, clear bpts at that pc.
         If line given (pc == 0), clear all bpts on specified line.
         If defaulting, clear all bpts on default line
         or at default pc.

         defaulting    sal.pc != 0    tests to do

         0              1             pc
         1              1             pc _and_ line
         0              0             line
         1              0             <can't happen> */

      sal_fullname = (sal.symtab == NULL
		      ? NULL : symtab_to_fullname (sal.symtab));

      /* Find all matching breakpoints and add them to 'found'.  */
      ALL_BREAKPOINTS (b)
	{
	  int match = 0;
	  /* Are we going to delete b?  */
	  if (b->type != bp_none && !is_watchpoint (b))
	    {
	      struct bp_location *loc = b->loc;
	      for (; loc; loc = loc->next)
		{
		  /* If the user specified file:line, don't allow a PC
		     match.  This matches historical gdb behavior.  */
		  int pc_match = (!sal.explicit_line
				  && sal.pc
				  && (loc->pspace == sal.pspace)
				  && (loc->address == sal.pc)
				  && (!section_is_overlay (loc->section)
				      || loc->section == sal.section));
		  int line_match = 0;

		  if ((default_match || sal.explicit_line)
		      && loc->symtab != NULL
		      && sal_fullname != NULL
		      && sal.pspace == loc->pspace
		      && loc->line_number == sal.line
		      && filename_cmp (symtab_to_fullname (loc->symtab),
				       sal_fullname) == 0)
		    line_match = 1;

		  if (pc_match || line_match)
		    {
		      match = 1;
		      break;
		    }
		}
	    }

	  if (match)
	    found.push_back (b);
	}
    }

  /* Now go thru the 'found' chain and delete them.  */
  if (found.empty ())
    {
      if (arg)
	error (_("No breakpoint at %s."), arg);
      else
	error (_("No breakpoint at this line."));
    }

  /* Remove duplicates from the vec.  */
  std::sort (found.begin (), found.end (),
	     [] (const breakpoint *a, const breakpoint *b)
	     {
	       return compare_breakpoints (a, b) < 0;
	     });
  found.erase (std::unique (found.begin (), found.end (),
			    [] (const breakpoint *a, const breakpoint *b)
			    {
			      return compare_breakpoints (a, b) == 0;
			    }),
	       found.end ());

  if (found.size () > 1)
    from_tty = 1;	/* Always report if deleted more than one.  */
  if (from_tty)
    {
      if (found.size () == 1)
	printf_unfiltered (_("Deleted breakpoint "));
      else
	printf_unfiltered (_("Deleted breakpoints "));
    }

  for (breakpoint *iter : found)
    {
      if (from_tty)
	printf_unfiltered ("%d ", iter->number);
      delete_breakpoint (iter);
    }
  if (from_tty)
    putchar_unfiltered ('\n');
}

/* Delete breakpoint in BS if they are `delete' breakpoints and
   all breakpoints that are marked for deletion, whether hit or not.
   This is called after any breakpoint is hit, or after errors.  */

void
breakpoint_auto_delete (bpstat bs)
{
  struct breakpoint *b, *b_tmp;

  for (; bs; bs = bs->next)
    if (bs->breakpoint_at
	&& bs->breakpoint_at->disposition == disp_del
	&& bs->stop)
      delete_breakpoint (bs->breakpoint_at);

  ALL_BREAKPOINTS_SAFE (b, b_tmp)
  {
    if (b->disposition == disp_del_at_next_stop)
      delete_breakpoint (b);
  }
}

/* A comparison function for bp_location AP and BP being interfaced to
   qsort.  Sort elements primarily by their ADDRESS (no matter what
   does breakpoint_address_is_meaningful say for its OWNER),
   secondarily by ordering first permanent elements and
   terciarily just ensuring the array is sorted stable way despite
   qsort being an unstable algorithm.  */

static int
bp_locations_compare (const void *ap, const void *bp)
{
  const struct bp_location *a = *(const struct bp_location **) ap;
  const struct bp_location *b = *(const struct bp_location **) bp;

  if (a->address != b->address)
    return (a->address > b->address) - (a->address < b->address);

  /* Sort locations at the same address by their pspace number, keeping
     locations of the same inferior (in a multi-inferior environment)
     grouped.  */

  if (a->pspace->num != b->pspace->num)
    return ((a->pspace->num > b->pspace->num)
	    - (a->pspace->num < b->pspace->num));

  /* Sort permanent breakpoints first.  */
  if (a->permanent != b->permanent)
    return (a->permanent < b->permanent) - (a->permanent > b->permanent);

  /* Make the internal GDB representation stable across GDB runs
     where A and B memory inside GDB can differ.  Breakpoint locations of
     the same type at the same address can be sorted in arbitrary order.  */

  if (a->owner->number != b->owner->number)
    return ((a->owner->number > b->owner->number)
	    - (a->owner->number < b->owner->number));

  return (a > b) - (a < b);
}

/* Set bp_locations_placed_address_before_address_max and
   bp_locations_shadow_len_after_address_max according to the current
   content of the bp_locations array.  */

static void
bp_locations_target_extensions_update (void)
{
  struct bp_location *bl, **blp_tmp;

  bp_locations_placed_address_before_address_max = 0;
  bp_locations_shadow_len_after_address_max = 0;

  ALL_BP_LOCATIONS (bl, blp_tmp)
    {
      CORE_ADDR start, end, addr;

      if (!bp_location_has_shadow (bl))
	continue;

      start = bl->target_info.placed_address;
      end = start + bl->target_info.shadow_len;

      gdb_assert (bl->address >= start);
      addr = bl->address - start;
      if (addr > bp_locations_placed_address_before_address_max)
	bp_locations_placed_address_before_address_max = addr;

      /* Zero SHADOW_LEN would not pass bp_location_has_shadow.  */

      gdb_assert (bl->address < end);
      addr = end - bl->address;
      if (addr > bp_locations_shadow_len_after_address_max)
	bp_locations_shadow_len_after_address_max = addr;
    }
}

/* Download tracepoint locations if they haven't been.  */

static void
download_tracepoint_locations (void)
{
  struct breakpoint *b;
  enum tribool can_download_tracepoint = TRIBOOL_UNKNOWN;

  scoped_restore_current_pspace_and_thread restore_pspace_thread;

  ALL_TRACEPOINTS (b)
    {
      struct bp_location *bl;
      struct tracepoint *t;
      int bp_location_downloaded = 0;

      if ((b->type == bp_fast_tracepoint
	   ? !may_insert_fast_tracepoints
	   : !may_insert_tracepoints))
	continue;

      if (can_download_tracepoint == TRIBOOL_UNKNOWN)
	{
	  if (target_can_download_tracepoint ())
	    can_download_tracepoint = TRIBOOL_TRUE;
	  else
	    can_download_tracepoint = TRIBOOL_FALSE;
	}

      if (can_download_tracepoint == TRIBOOL_FALSE)
	break;

      for (bl = b->loc; bl; bl = bl->next)
	{
	  /* In tracepoint, locations are _never_ duplicated, so
	     should_be_inserted is equivalent to
	     unduplicated_should_be_inserted.  */
	  if (!should_be_inserted (bl) || bl->inserted)
	    continue;

	  switch_to_program_space_and_thread (bl->pspace);

	  target_download_tracepoint (bl);

	  bl->inserted = 1;
	  bp_location_downloaded = 1;
	}
      t = (struct tracepoint *) b;
      t->number_on_target = b->number;
      if (bp_location_downloaded)
	gdb::observers::breakpoint_modified.notify (b);
    }
}

/* Swap the insertion/duplication state between two locations.  */

static void
swap_insertion (struct bp_location *left, struct bp_location *right)
{
  const int left_inserted = left->inserted;
  const int left_duplicate = left->duplicate;
  const int left_needs_update = left->needs_update;
  const struct bp_target_info left_target_info = left->target_info;

  /* Locations of tracepoints can never be duplicated.  */
  if (is_tracepoint (left->owner))
    gdb_assert (!left->duplicate);
  if (is_tracepoint (right->owner))
    gdb_assert (!right->duplicate);

  left->inserted = right->inserted;
  left->duplicate = right->duplicate;
  left->needs_update = right->needs_update;
  left->target_info = right->target_info;
  right->inserted = left_inserted;
  right->duplicate = left_duplicate;
  right->needs_update = left_needs_update;
  right->target_info = left_target_info;
}

/* Force the re-insertion of the locations at ADDRESS.  This is called
   once a new/deleted/modified duplicate location is found and we are evaluating
   conditions on the target's side.  Such conditions need to be updated on
   the target.  */

static void
force_breakpoint_reinsertion (struct bp_location *bl)
{
  struct bp_location **locp = NULL, **loc2p;
  struct bp_location *loc;
  CORE_ADDR address = 0;
  int pspace_num;

  address = bl->address;
  pspace_num = bl->pspace->num;

  /* This is only meaningful if the target is
     evaluating conditions and if the user has
     opted for condition evaluation on the target's
     side.  */
  if (gdb_evaluates_breakpoint_condition_p ()
      || !target_supports_evaluation_of_breakpoint_conditions ())
    return;

  /* Flag all breakpoint locations with this address and
     the same program space as the location
     as "its condition has changed".  We need to
     update the conditions on the target's side.  */
  ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, address)
    {
      loc = *loc2p;

      if (!is_breakpoint (loc->owner)
	  || pspace_num != loc->pspace->num)
	continue;

      /* Flag the location appropriately.  We use a different state to
	 let everyone know that we already updated the set of locations
	 with addr bl->address and program space bl->pspace.  This is so
	 we don't have to keep calling these functions just to mark locations
	 that have already been marked.  */
      loc->condition_changed = condition_updated;

      /* Free the agent expression bytecode as well.  We will compute
	 it later on.  */
      loc->cond_bytecode.reset ();
    }
}
/* Called whether new breakpoints are created, or existing breakpoints
   deleted, to update the global location list and recompute which
   locations are duplicate of which.

   The INSERT_MODE flag determines whether locations may not, may, or
   shall be inserted now.  See 'enum ugll_insert_mode' for more
   info.  */

static void
update_global_location_list (enum ugll_insert_mode insert_mode)
{
  struct breakpoint *b;
  struct bp_location **locp, *loc;
  /* Last breakpoint location address that was marked for update.  */
  CORE_ADDR last_addr = 0;
  /* Last breakpoint location program space that was marked for update.  */
  int last_pspace_num = -1;

  /* Used in the duplicates detection below.  When iterating over all
     bp_locations, points to the first bp_location of a given address.
     Breakpoints and watchpoints of different types are never
     duplicates of each other.  Keep one pointer for each type of
     breakpoint/watchpoint, so we only need to loop over all locations
     once.  */
  struct bp_location *bp_loc_first;  /* breakpoint */
  struct bp_location *wp_loc_first;  /* hardware watchpoint */
  struct bp_location *awp_loc_first; /* access watchpoint */
  struct bp_location *rwp_loc_first; /* read watchpoint */

  /* Saved former bp_locations array which we compare against the newly
     built bp_locations from the current state of ALL_BREAKPOINTS.  */
  struct bp_location **old_locp;
  unsigned old_locations_count;
  gdb::unique_xmalloc_ptr<struct bp_location *> old_locations (bp_locations);

  old_locations_count = bp_locations_count;
  bp_locations = NULL;
  bp_locations_count = 0;

  ALL_BREAKPOINTS (b)
    for (loc = b->loc; loc; loc = loc->next)
      bp_locations_count++;

  bp_locations = XNEWVEC (struct bp_location *, bp_locations_count);
  locp = bp_locations;
  ALL_BREAKPOINTS (b)
    for (loc = b->loc; loc; loc = loc->next)
      *locp++ = loc;
  qsort (bp_locations, bp_locations_count, sizeof (*bp_locations),
	 bp_locations_compare);

  bp_locations_target_extensions_update ();

  /* Identify bp_location instances that are no longer present in the
     new list, and therefore should be freed.  Note that it's not
     necessary that those locations should be removed from inferior --
     if there's another location at the same address (previously
     marked as duplicate), we don't need to remove/insert the
     location.
     
     LOCP is kept in sync with OLD_LOCP, each pointing to the current
     and former bp_location array state respectively.  */

  locp = bp_locations;
  for (old_locp = old_locations.get ();
       old_locp < old_locations.get () + old_locations_count;
       old_locp++)
    {
      struct bp_location *old_loc = *old_locp;
      struct bp_location **loc2p;

      /* Tells if 'old_loc' is found among the new locations.  If
	 not, we have to free it.  */
      int found_object = 0;
      /* Tells if the location should remain inserted in the target.  */
      int keep_in_target = 0;
      int removed = 0;

      /* Skip LOCP entries which will definitely never be needed.
	 Stop either at or being the one matching OLD_LOC.  */
      while (locp < bp_locations + bp_locations_count
	     && (*locp)->address < old_loc->address)
	locp++;

      for (loc2p = locp;
	   (loc2p < bp_locations + bp_locations_count
	    && (*loc2p)->address == old_loc->address);
	   loc2p++)
	{
	  /* Check if this is a new/duplicated location or a duplicated
	     location that had its condition modified.  If so, we want to send
	     its condition to the target if evaluation of conditions is taking
	     place there.  */
	  if ((*loc2p)->condition_changed == condition_modified
	      && (last_addr != old_loc->address
		  || last_pspace_num != old_loc->pspace->num))
	    {
	      force_breakpoint_reinsertion (*loc2p);
	      last_pspace_num = old_loc->pspace->num;
	    }

	  if (*loc2p == old_loc)
	    found_object = 1;
	}

      /* We have already handled this address, update it so that we don't
	 have to go through updates again.  */
      last_addr = old_loc->address;

      /* Target-side condition evaluation: Handle deleted locations.  */
      if (!found_object)
	force_breakpoint_reinsertion (old_loc);

      /* If this location is no longer present, and inserted, look if
	 there's maybe a new location at the same address.  If so,
	 mark that one inserted, and don't remove this one.  This is
	 needed so that we don't have a time window where a breakpoint
	 at certain location is not inserted.  */

      if (old_loc->inserted)
	{
	  /* If the location is inserted now, we might have to remove
	     it.  */

	  if (found_object && should_be_inserted (old_loc))
	    {
	      /* The location is still present in the location list,
		 and still should be inserted.  Don't do anything.  */
	      keep_in_target = 1;
	    }
	  else
	    {
	      /* This location still exists, but it won't be kept in the
		 target since it may have been disabled.  We proceed to
		 remove its target-side condition.  */

	      /* The location is either no longer present, or got
		 disabled.  See if there's another location at the
		 same address, in which case we don't need to remove
		 this one from the target.  */

	      /* OLD_LOC comes from existing struct breakpoint.  */
	      if (breakpoint_address_is_meaningful (old_loc->owner))
		{
		  for (loc2p = locp;
		       (loc2p < bp_locations + bp_locations_count
			&& (*loc2p)->address == old_loc->address);
		       loc2p++)
		    {
		      struct bp_location *loc2 = *loc2p;

		      if (breakpoint_locations_match (loc2, old_loc))
			{
			  /* Read watchpoint locations are switched to
			     access watchpoints, if the former are not
			     supported, but the latter are.  */
			  if (is_hardware_watchpoint (old_loc->owner))
			    {
			      gdb_assert (is_hardware_watchpoint (loc2->owner));
			      loc2->watchpoint_type = old_loc->watchpoint_type;
			    }

			  /* loc2 is a duplicated location. We need to check
			     if it should be inserted in case it will be
			     unduplicated.  */
			  if (loc2 != old_loc
			      && unduplicated_should_be_inserted (loc2))
			    {
			      swap_insertion (old_loc, loc2);
			      keep_in_target = 1;
			      break;
			    }
			}
		    }
		}
	    }

	  if (!keep_in_target)
	    {
	      if (remove_breakpoint (old_loc))
		{
		  /* This is just about all we can do.  We could keep
		     this location on the global list, and try to
		     remove it next time, but there's no particular
		     reason why we will succeed next time.
		     
		     Note that at this point, old_loc->owner is still
		     valid, as delete_breakpoint frees the breakpoint
		     only after calling us.  */
		  printf_filtered (_("warning: Error removing "
				     "breakpoint %d\n"), 
				   old_loc->owner->number);
		}
	      removed = 1;
	    }
	}

      if (!found_object)
	{
	  if (removed && target_is_non_stop_p ()
	      && need_moribund_for_location_type (old_loc))
	    {
	      /* This location was removed from the target.  In
		 non-stop mode, a race condition is possible where
		 we've removed a breakpoint, but stop events for that
		 breakpoint are already queued and will arrive later.
		 We apply an heuristic to be able to distinguish such
		 SIGTRAPs from other random SIGTRAPs: we keep this
		 breakpoint location for a bit, and will retire it
		 after we see some number of events.  The theory here
		 is that reporting of events should, "on the average",
		 be fair, so after a while we'll see events from all
		 threads that have anything of interest, and no longer
		 need to keep this breakpoint location around.  We
		 don't hold locations forever so to reduce chances of
		 mistaking a non-breakpoint SIGTRAP for a breakpoint
		 SIGTRAP.

		 The heuristic failing can be disastrous on
		 decr_pc_after_break targets.

		 On decr_pc_after_break targets, like e.g., x86-linux,
		 if we fail to recognize a late breakpoint SIGTRAP,
		 because events_till_retirement has reached 0 too
		 soon, we'll fail to do the PC adjustment, and report
		 a random SIGTRAP to the user.  When the user resumes
		 the inferior, it will most likely immediately crash
		 with SIGILL/SIGBUS/SIGSEGV, or worse, get silently
		 corrupted, because of being resumed e.g., in the
		 middle of a multi-byte instruction, or skipped a
		 one-byte instruction.  This was actually seen happen
		 on native x86-linux, and should be less rare on
		 targets that do not support new thread events, like
		 remote, due to the heuristic depending on
		 thread_count.

		 Mistaking a random SIGTRAP for a breakpoint trap
		 causes similar symptoms (PC adjustment applied when
		 it shouldn't), but then again, playing with SIGTRAPs
		 behind the debugger's back is asking for trouble.

		 Since hardware watchpoint traps are always
		 distinguishable from other traps, so we don't need to
		 apply keep hardware watchpoint moribund locations
		 around.  We simply always ignore hardware watchpoint
		 traps we can no longer explain.  */

	      old_loc->events_till_retirement = 3 * (thread_count () + 1);
	      old_loc->owner = NULL;

	      VEC_safe_push (bp_location_p, moribund_locations, old_loc);
	    }
	  else
	    {
	      old_loc->owner = NULL;
	      decref_bp_location (&old_loc);
	    }
	}
    }

  /* Rescan breakpoints at the same address and section, marking the
     first one as "first" and any others as "duplicates".  This is so
     that the bpt instruction is only inserted once.  If we have a
     permanent breakpoint at the same place as BPT, make that one the
     official one, and the rest as duplicates.  Permanent breakpoints
     are sorted first for the same address.

     Do the same for hardware watchpoints, but also considering the
     watchpoint's type (regular/access/read) and length.  */

  bp_loc_first = NULL;
  wp_loc_first = NULL;
  awp_loc_first = NULL;
  rwp_loc_first = NULL;
  ALL_BP_LOCATIONS (loc, locp)
    {
      /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always
	 non-NULL.  */
      struct bp_location **loc_first_p;
      b = loc->owner;

      if (!unduplicated_should_be_inserted (loc)
	  || !breakpoint_address_is_meaningful (b)
	  /* Don't detect duplicate for tracepoint locations because they are
	   never duplicated.  See the comments in field `duplicate' of
	   `struct bp_location'.  */
	  || is_tracepoint (b))
	{
	  /* Clear the condition modification flag.  */
	  loc->condition_changed = condition_unchanged;
	  continue;
	}

      if (b->type == bp_hardware_watchpoint)
	loc_first_p = &wp_loc_first;
      else if (b->type == bp_read_watchpoint)
	loc_first_p = &rwp_loc_first;
      else if (b->type == bp_access_watchpoint)
	loc_first_p = &awp_loc_first;
      else
	loc_first_p = &bp_loc_first;

      if (*loc_first_p == NULL
	  || (overlay_debugging && loc->section != (*loc_first_p)->section)
	  || !breakpoint_locations_match (loc, *loc_first_p))
	{
	  *loc_first_p = loc;
	  loc->duplicate = 0;

	  if (is_breakpoint (loc->owner) && loc->condition_changed)
	    {
	      loc->needs_update = 1;
	      /* Clear the condition modification flag.  */
	      loc->condition_changed = condition_unchanged;
	    }
	  continue;
	}


      /* This and the above ensure the invariant that the first location
	 is not duplicated, and is the inserted one.
	 All following are marked as duplicated, and are not inserted.  */
      if (loc->inserted)
	swap_insertion (loc, *loc_first_p);
      loc->duplicate = 1;

      /* Clear the condition modification flag.  */
      loc->condition_changed = condition_unchanged;
    }

  if (insert_mode == UGLL_INSERT || breakpoints_should_be_inserted_now ())
    {
      if (insert_mode != UGLL_DONT_INSERT)
	insert_breakpoint_locations ();
      else
	{
	  /* Even though the caller told us to not insert new
	     locations, we may still need to update conditions on the
	     target's side of breakpoints that were already inserted
	     if the target is evaluating breakpoint conditions.  We
	     only update conditions for locations that are marked
	     "needs_update".  */
	  update_inserted_breakpoint_locations ();
	}
    }

  if (insert_mode != UGLL_DONT_INSERT)
    download_tracepoint_locations ();
}

void
breakpoint_retire_moribund (void)
{
  struct bp_location *loc;
  int ix;

  for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix)
    if (--(loc->events_till_retirement) == 0)
      {
	decref_bp_location (&loc);
	VEC_unordered_remove (bp_location_p, moribund_locations, ix);
	--ix;
      }
}

static void
update_global_location_list_nothrow (enum ugll_insert_mode insert_mode)
{

  TRY
    {
      update_global_location_list (insert_mode);
    }
  CATCH (e, RETURN_MASK_ERROR)
    {
    }
  END_CATCH
}

/* Clear BKP from a BPS.  */

static void
bpstat_remove_bp_location (bpstat bps, struct breakpoint *bpt)
{
  bpstat bs;

  for (bs = bps; bs; bs = bs->next)
    if (bs->breakpoint_at == bpt)
      {
	bs->breakpoint_at = NULL;
	bs->old_val = NULL;
	/* bs->commands will be freed later.  */
      }
}

/* Callback for iterate_over_threads.  */
static int
bpstat_remove_breakpoint_callback (struct thread_info *th, void *data)
{
  struct breakpoint *bpt = (struct breakpoint *) data;

  bpstat_remove_bp_location (th->control.stop_bpstat, bpt);
  return 0;
}

/* Helper for breakpoint and tracepoint breakpoint_ops->mention
   callbacks.  */

static void
say_where (struct breakpoint *b)
{
  struct value_print_options opts;

  get_user_print_options (&opts);

  /* i18n: cagney/2005-02-11: Below needs to be merged into a
     single string.  */
  if (b->loc == NULL)
    {
      /* For pending locations, the output differs slightly based
	 on b->extra_string.  If this is non-NULL, it contains either
	 a condition or dprintf arguments.  */
      if (b->extra_string == NULL)
	{
	  printf_filtered (_(" (%s) pending."),
			   event_location_to_string (b->location.get ()));
	}
      else if (b->type == bp_dprintf)
	{
	  printf_filtered (_(" (%s,%s) pending."),
			   event_location_to_string (b->location.get ()),
			   b->extra_string);
	}
      else
	{
	  printf_filtered (_(" (%s %s) pending."),
			   event_location_to_string (b->location.get ()),
			   b->extra_string);
	}
    }
  else
    {
      if (opts.addressprint || b->loc->symtab == NULL)
	{
	  printf_filtered (" at ");
	  fputs_filtered (paddress (b->loc->gdbarch, b->loc->address),
			  gdb_stdout);
	}
      if (b->loc->symtab != NULL)
	{
	  /* If there is a single location, we can print the location
	     more nicely.  */
	  if (b->loc->next == NULL)
	    printf_filtered (": file %s, line %d.",
			     symtab_to_filename_for_display (b->loc->symtab),
			     b->loc->line_number);
	  else
	    /* This is not ideal, but each location may have a
	       different file name, and this at least reflects the
	       real situation somewhat.  */
	    printf_filtered (": %s.",
			     event_location_to_string (b->location.get ()));
	}

      if (b->loc->next)
	{
	  struct bp_location *loc = b->loc;
	  int n = 0;
	  for (; loc; loc = loc->next)
	    ++n;
	  printf_filtered (" (%d locations)", n);
	}
    }
}

/* Default bp_location_ops methods.  */

static void
bp_location_dtor (struct bp_location *self)
{
  xfree (self->function_name);
}

static const struct bp_location_ops bp_location_ops =
{
  bp_location_dtor
};

/* Destructor for the breakpoint base class.  */

breakpoint::~breakpoint ()
{
  xfree (this->cond_string);
  xfree (this->extra_string);
  xfree (this->filter);
}

static struct bp_location *
base_breakpoint_allocate_location (struct breakpoint *self)
{
  return new bp_location (&bp_location_ops, self);
}

static void
base_breakpoint_re_set (struct breakpoint *b)
{
  /* Nothing to re-set. */
}

#define internal_error_pure_virtual_called() \
  gdb_assert_not_reached ("pure virtual function called")

static int
base_breakpoint_insert_location (struct bp_location *bl)
{
  internal_error_pure_virtual_called ();
}

static int
base_breakpoint_remove_location (struct bp_location *bl,
				 enum remove_bp_reason reason)
{
  internal_error_pure_virtual_called ();
}

static int
base_breakpoint_breakpoint_hit (const struct bp_location *bl,
				const address_space *aspace,
				CORE_ADDR bp_addr,
				const struct target_waitstatus *ws)
{
  internal_error_pure_virtual_called ();
}

static void
base_breakpoint_check_status (bpstat bs)
{
  /* Always stop.   */
}

/* A "works_in_software_mode" breakpoint_ops method that just internal
   errors.  */

static int
base_breakpoint_works_in_software_mode (const struct breakpoint *b)
{
  internal_error_pure_virtual_called ();
}

/* A "resources_needed" breakpoint_ops method that just internal
   errors.  */

static int
base_breakpoint_resources_needed (const struct bp_location *bl)
{
  internal_error_pure_virtual_called ();
}

static enum print_stop_action
base_breakpoint_print_it (bpstat bs)
{
  internal_error_pure_virtual_called ();
}

static void
base_breakpoint_print_one_detail (const struct breakpoint *self,
				  struct ui_out *uiout)
{
  /* nothing */
}

static void
base_breakpoint_print_mention (struct breakpoint *b)
{
  internal_error_pure_virtual_called ();
}

static void
base_breakpoint_print_recreate (struct breakpoint *b, struct ui_file *fp)
{
  internal_error_pure_virtual_called ();
}

static void
base_breakpoint_create_sals_from_location
  (const struct event_location *location,
   struct linespec_result *canonical,
   enum bptype type_wanted)
{
  internal_error_pure_virtual_called ();
}

static void
base_breakpoint_create_breakpoints_sal (struct gdbarch *gdbarch,
					struct linespec_result *c,
					gdb::unique_xmalloc_ptr<char> cond_string,
					gdb::unique_xmalloc_ptr<char> extra_string,
					enum bptype type_wanted,
					enum bpdisp disposition,
					int thread,
					int task, int ignore_count,
					const struct breakpoint_ops *o,
					int from_tty, int enabled,
					int internal, unsigned flags)
{
  internal_error_pure_virtual_called ();
}

static std::vector<symtab_and_line>
base_breakpoint_decode_location (struct breakpoint *b,
				 const struct event_location *location,
				 struct program_space *search_pspace)
{
  internal_error_pure_virtual_called ();
}

/* The default 'explains_signal' method.  */

static int
base_breakpoint_explains_signal (struct breakpoint *b, enum gdb_signal sig)
{
  return 1;
}

/* The default "after_condition_true" method.  */

static void
base_breakpoint_after_condition_true (struct bpstats *bs)
{
  /* Nothing to do.   */
}

struct breakpoint_ops base_breakpoint_ops =
{
  base_breakpoint_allocate_location,
  base_breakpoint_re_set,
  base_breakpoint_insert_location,
  base_breakpoint_remove_location,
  base_breakpoint_breakpoint_hit,
  base_breakpoint_check_status,
  base_breakpoint_resources_needed,
  base_breakpoint_works_in_software_mode,
  base_breakpoint_print_it,
  NULL,
  base_breakpoint_print_one_detail,
  base_breakpoint_print_mention,
  base_breakpoint_print_recreate,
  base_breakpoint_create_sals_from_location,
  base_breakpoint_create_breakpoints_sal,
  base_breakpoint_decode_location,
  base_breakpoint_explains_signal,
  base_breakpoint_after_condition_true,
};

/* Default breakpoint_ops methods.  */

static void
bkpt_re_set (struct breakpoint *b)
{
  /* FIXME: is this still reachable?  */
  if (breakpoint_event_location_empty_p (b))
    {
      /* Anything without a location can't be re-set.  */
      delete_breakpoint (b);
      return;
    }

  breakpoint_re_set_default (b);
}

static int
bkpt_insert_location (struct bp_location *bl)
{
  CORE_ADDR addr = bl->target_info.reqstd_address;

  bl->target_info.kind = breakpoint_kind (bl, &addr);
  bl->target_info.placed_address = addr;

  if (bl->loc_type == bp_loc_hardware_breakpoint)
    return target_insert_hw_breakpoint (bl->gdbarch, &bl->target_info);
  else
    return target_insert_breakpoint (bl->gdbarch, &bl->target_info);
}

static int
bkpt_remove_location (struct bp_location *bl, enum remove_bp_reason reason)
{
  if (bl->loc_type == bp_loc_hardware_breakpoint)
    return target_remove_hw_breakpoint (bl->gdbarch, &bl->target_info);
  else
    return target_remove_breakpoint (bl->gdbarch, &bl->target_info, reason);
}

static int
bkpt_breakpoint_hit (const struct bp_location *bl,
		     const address_space *aspace, CORE_ADDR bp_addr,
		     const struct target_waitstatus *ws)
{
  if (ws->kind != TARGET_WAITKIND_STOPPED
      || ws->value.sig != GDB_SIGNAL_TRAP)
    return 0;

  if (!breakpoint_address_match (bl->pspace->aspace, bl->address,
				 aspace, bp_addr))
    return 0;

  if (overlay_debugging		/* unmapped overlay section */
      && section_is_overlay (bl->section)
      && !section_is_mapped (bl->section))
    return 0;

  return 1;
}

static int
dprintf_breakpoint_hit (const struct bp_location *bl,
			const address_space *aspace, CORE_ADDR bp_addr,
			const struct target_waitstatus *ws)
{
  if (dprintf_style == dprintf_style_agent
      && target_can_run_breakpoint_commands ())
    {
      /* An agent-style dprintf never causes a stop.  If we see a trap
	 for this address it must be for a breakpoint that happens to
	 be set at the same address.  */
      return 0;
    }

  return bkpt_breakpoint_hit (bl, aspace, bp_addr, ws);
}

static int
bkpt_resources_needed (const struct bp_location *bl)
{
  gdb_assert (bl->owner->type == bp_hardware_breakpoint);

  return 1;
}

static enum print_stop_action
bkpt_print_it (bpstat bs)
{
  struct breakpoint *b;
  const struct bp_location *bl;
  int bp_temp;
  struct ui_out *uiout = current_uiout;

  gdb_assert (bs->bp_location_at != NULL);

  bl = bs->bp_location_at;
  b = bs->breakpoint_at;

  bp_temp = b->disposition == disp_del;
  if (bl->address != bl->requested_address)
    breakpoint_adjustment_warning (bl->requested_address,
				   bl->address,
				   b->number, 1);
  annotate_breakpoint (b->number);
  maybe_print_thread_hit_breakpoint (uiout);

  if (bp_temp)
    uiout->text ("Temporary breakpoint ");
  else
    uiout->text ("Breakpoint ");
  if (uiout->is_mi_like_p ())
    {
      uiout->field_string ("reason",
			   async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
      uiout->field_string ("disp", bpdisp_text (b->disposition));
    }
  uiout->field_int ("bkptno", b->number);
  uiout->text (", ");

  return PRINT_SRC_AND_LOC;
}

static void
bkpt_print_mention (struct breakpoint *b)
{
  if (current_uiout->is_mi_like_p ())
    return;

  switch (b->type)
    {
    case bp_breakpoint:
    case bp_gnu_ifunc_resolver:
      if (b->disposition == disp_del)
	printf_filtered (_("Temporary breakpoint"));
      else
	printf_filtered (_("Breakpoint"));
      printf_filtered (_(" %d"), b->number);
      if (b->type == bp_gnu_ifunc_resolver)
	printf_filtered (_(" at gnu-indirect-function resolver"));
      break;
    case bp_hardware_breakpoint:
      printf_filtered (_("Hardware assisted breakpoint %d"), b->number);
      break;
    case bp_dprintf:
      printf_filtered (_("Dprintf %d"), b->number);
      break;
    }

  say_where (b);
}

static void
bkpt_print_recreate (struct breakpoint *tp, struct ui_file *fp)
{
  if (tp->type == bp_breakpoint && tp->disposition == disp_del)
    fprintf_unfiltered (fp, "tbreak");
  else if (tp->type == bp_breakpoint)
    fprintf_unfiltered (fp, "break");
  else if (tp->type == bp_hardware_breakpoint
	   && tp->disposition == disp_del)
    fprintf_unfiltered (fp, "thbreak");
  else if (tp->type == bp_hardware_breakpoint)
    fprintf_unfiltered (fp, "hbreak");
  else
    internal_error (__FILE__, __LINE__,
		    _("unhandled breakpoint type %d"), (int) tp->type);

  fprintf_unfiltered (fp, " %s",
		      event_location_to_string (tp->location.get ()));

  /* Print out extra_string if this breakpoint is pending.  It might
     contain, for example, conditions that were set by the user.  */
  if (tp->loc == NULL && tp->extra_string != NULL)
    fprintf_unfiltered (fp, " %s", tp->extra_string);

  print_recreate_thread (tp, fp);
}

static void
bkpt_create_sals_from_location (const struct event_location *location,
				struct linespec_result *canonical,
				enum bptype type_wanted)
{
  create_sals_from_location_default (location, canonical, type_wanted);
}

static void
bkpt_create_breakpoints_sal (struct gdbarch *gdbarch,
			     struct linespec_result *canonical,
			     gdb::unique_xmalloc_ptr<char> cond_string,
			     gdb::unique_xmalloc_ptr<char> extra_string,
			     enum bptype type_wanted,
			     enum bpdisp disposition,
			     int thread,
			     int task, int ignore_count,
			     const struct breakpoint_ops *ops,
			     int from_tty, int enabled,
			     int internal, unsigned flags)
{
  create_breakpoints_sal_default (gdbarch, canonical,
				  std::move (cond_string),
				  std::move (extra_string),
				  type_wanted,
				  disposition, thread, task,
				  ignore_count, ops, from_tty,
				  enabled, internal, flags);
}

static std::vector<symtab_and_line>
bkpt_decode_location (struct breakpoint *b,
		      const struct event_location *location,
		      struct program_space *search_pspace)
{
  return decode_location_default (b, location, search_pspace);
}

/* Virtual table for internal breakpoints.  */

static void
internal_bkpt_re_set (struct breakpoint *b)
{
  switch (b->type)
    {
      /* Delete overlay event and longjmp master breakpoints; they
	 will be reset later by breakpoint_re_set.  */
    case bp_overlay_event:
    case bp_longjmp_master:
    case bp_std_terminate_master:
    case bp_exception_master:
      delete_breakpoint (b);
      break;

      /* This breakpoint is special, it's set up when the inferior
         starts and we really don't want to touch it.  */
    case bp_shlib_event:

      /* Like bp_shlib_event, this breakpoint type is special.  Once
	 it is set up, we do not want to touch it.  */
    case bp_thread_event:
      break;
    }
}

static void
internal_bkpt_check_status (bpstat bs)
{
  if (bs->breakpoint_at->type == bp_shlib_event)
    {
      /* If requested, stop when the dynamic linker notifies GDB of
	 events.  This allows the user to get control and place
	 breakpoints in initializer routines for dynamically loaded
	 objects (among other things).  */
      bs->stop = stop_on_solib_events;
      bs->print = stop_on_solib_events;
    }
  else
    bs->stop = 0;
}

static enum print_stop_action
internal_bkpt_print_it (bpstat bs)
{
  struct breakpoint *b;

  b = bs->breakpoint_at;

  switch (b->type)
    {
    case bp_shlib_event:
      /* Did we stop because the user set the stop_on_solib_events
	 variable?  (If so, we report this as a generic, "Stopped due
	 to shlib event" message.) */
      print_solib_event (0);
      break;

    case bp_thread_event:
      /* Not sure how we will get here.
	 GDB should not stop for these breakpoints.  */
      printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
      break;

    case bp_overlay_event:
      /* By analogy with the thread event, GDB should not stop for these.  */
      printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
      break;

    case bp_longjmp_master:
      /* These should never be enabled.  */
      printf_filtered (_("Longjmp Master Breakpoint: gdb should not stop!\n"));
      break;

    case bp_std_terminate_master:
      /* These should never be enabled.  */
      printf_filtered (_("std::terminate Master Breakpoint: "
			 "gdb should not stop!\n"));
      break;

    case bp_exception_master:
      /* These should never be enabled.  */
      printf_filtered (_("Exception Master Breakpoint: "
			 "gdb should not stop!\n"));
      break;
    }

  return PRINT_NOTHING;
}

static void
internal_bkpt_print_mention (struct breakpoint *b)
{
  /* Nothing to mention.  These breakpoints are internal.  */
}

/* Virtual table for momentary breakpoints  */

static void
momentary_bkpt_re_set (struct breakpoint *b)
{
  /* Keep temporary breakpoints, which can be encountered when we step
     over a dlopen call and solib_add is resetting the breakpoints.
     Otherwise these should have been blown away via the cleanup chain
     or by breakpoint_init_inferior when we rerun the executable.  */
}

static void
momentary_bkpt_check_status (bpstat bs)
{
  /* Nothing.  The point of these breakpoints is causing a stop.  */
}

static enum print_stop_action
momentary_bkpt_print_it (bpstat bs)
{
  return PRINT_UNKNOWN;
}

static void
momentary_bkpt_print_mention (struct breakpoint *b)
{
  /* Nothing to mention.  These breakpoints are internal.  */
}

/* Ensure INITIATING_FRAME is cleared when no such breakpoint exists.

   It gets cleared already on the removal of the first one of such placed
   breakpoints.  This is OK as they get all removed altogether.  */

longjmp_breakpoint::~longjmp_breakpoint ()
{
  thread_info *tp = find_thread_global_id (this->thread);

  if (tp != NULL)
    tp->initiating_frame = null_frame_id;
}

/* Specific methods for probe breakpoints.  */

static int
bkpt_probe_insert_location (struct bp_location *bl)
{
  int v = bkpt_insert_location (bl);

  if (v == 0)
    {
      /* The insertion was successful, now let's set the probe's semaphore
	 if needed.  */
      bl->probe.prob->set_semaphore (bl->probe.objfile, bl->gdbarch);
    }

  return v;
}

static int
bkpt_probe_remove_location (struct bp_location *bl,
			    enum remove_bp_reason reason)
{
  /* Let's clear the semaphore before removing the location.  */
  bl->probe.prob->clear_semaphore (bl->probe.objfile, bl->gdbarch);

  return bkpt_remove_location (bl, reason);
}

static void
bkpt_probe_create_sals_from_location (const struct event_location *location,
				      struct linespec_result *canonical,
				      enum bptype type_wanted)
{
  struct linespec_sals lsal;

  lsal.sals = parse_probes (location, NULL, canonical);
  lsal.canonical
    = xstrdup (event_location_to_string (canonical->location.get ()));
  canonical->lsals.push_back (std::move (lsal));
}

static std::vector<symtab_and_line>
bkpt_probe_decode_location (struct breakpoint *b,
			    const struct event_location *location,
			    struct program_space *search_pspace)
{
  std::vector<symtab_and_line> sals = parse_probes (location, search_pspace, NULL);
  if (sals.empty ())
    error (_("probe not found"));
  return sals;
}

/* The breakpoint_ops structure to be used in tracepoints.  */

static void
tracepoint_re_set (struct breakpoint *b)
{
  breakpoint_re_set_default (b);
}

static int
tracepoint_breakpoint_hit (const struct bp_location *bl,
			   const address_space *aspace, CORE_ADDR bp_addr,
			   const struct target_waitstatus *ws)
{
  /* By definition, the inferior does not report stops at
     tracepoints.  */
  return 0;
}

static void
tracepoint_print_one_detail (const struct breakpoint *self,
			     struct ui_out *uiout)
{
  struct tracepoint *tp = (struct tracepoint *) self;
  if (!tp->static_trace_marker_id.empty ())
    {
      gdb_assert (self->type == bp_static_tracepoint);

      uiout->text ("\tmarker id is ");
      uiout->field_string ("static-tracepoint-marker-string-id",
			   tp->static_trace_marker_id);
      uiout->text ("\n");
    }
}

static void
tracepoint_print_mention (struct breakpoint *b)
{
  if (current_uiout->is_mi_like_p ())
    return;

  switch (b->type)
    {
    case bp_tracepoint:
      printf_filtered (_("Tracepoint"));
      printf_filtered (_(" %d"), b->number);
      break;
    case bp_fast_tracepoint:
      printf_filtered (_("Fast tracepoint"));
      printf_filtered (_(" %d"), b->number);
      break;
    case bp_static_tracepoint:
      printf_filtered (_("Static tracepoint"));
      printf_filtered (_(" %d"), b->number);
      break;
    default:
      internal_error (__FILE__, __LINE__,
		      _("unhandled tracepoint type %d"), (int) b->type);
    }

  say_where (b);
}

static void
tracepoint_print_recreate (struct breakpoint *self, struct ui_file *fp)
{
  struct tracepoint *tp = (struct tracepoint *) self;

  if (self->type == bp_fast_tracepoint)
    fprintf_unfiltered (fp, "ftrace");
  else if (self->type == bp_static_tracepoint)
    fprintf_unfiltered (fp, "strace");
  else if (self->type == bp_tracepoint)
    fprintf_unfiltered (fp, "trace");
  else
    internal_error (__FILE__, __LINE__,
		    _("unhandled tracepoint type %d"), (int) self->type);

  fprintf_unfiltered (fp, " %s",
		      event_location_to_string (self->location.get ()));
  print_recreate_thread (self, fp);

  if (tp->pass_count)
    fprintf_unfiltered (fp, "  passcount %d\n", tp->pass_count);
}

static void
tracepoint_create_sals_from_location (const struct event_location *location,
				      struct linespec_result *canonical,
				      enum bptype type_wanted)
{
  create_sals_from_location_default (location, canonical, type_wanted);
}

static void
tracepoint_create_breakpoints_sal (struct gdbarch *gdbarch,
				   struct linespec_result *canonical,
				   gdb::unique_xmalloc_ptr<char> cond_string,
				   gdb::unique_xmalloc_ptr<char> extra_string,
				   enum bptype type_wanted,
				   enum bpdisp disposition,
				   int thread,
				   int task, int ignore_count,
				   const struct breakpoint_ops *ops,
				   int from_tty, int enabled,
				   int internal, unsigned flags)
{
  create_breakpoints_sal_default (gdbarch, canonical,
				  std::move (cond_string),
				  std::move (extra_string),
				  type_wanted,
				  disposition, thread, task,
				  ignore_count, ops, from_tty,
				  enabled, internal, flags);
}

static std::vector<symtab_and_line>
tracepoint_decode_location (struct breakpoint *b,
			    const struct event_location *location,
			    struct program_space *search_pspace)
{
  return decode_location_default (b, location, search_pspace);
}

struct breakpoint_ops tracepoint_breakpoint_ops;

/* The breakpoint_ops structure to be use on tracepoints placed in a
   static probe.  */

static void
tracepoint_probe_create_sals_from_location
  (const struct event_location *location,
   struct linespec_result *canonical,
   enum bptype type_wanted)
{
  /* We use the same method for breakpoint on probes.  */
  bkpt_probe_create_sals_from_location (location, canonical, type_wanted);
}

static std::vector<symtab_and_line>
tracepoint_probe_decode_location (struct breakpoint *b,
				  const struct event_location *location,
				  struct program_space *search_pspace)
{
  /* We use the same method for breakpoint on probes.  */
  return bkpt_probe_decode_location (b, location, search_pspace);
}

static struct breakpoint_ops tracepoint_probe_breakpoint_ops;

/* Dprintf breakpoint_ops methods.  */

static void
dprintf_re_set (struct breakpoint *b)
{
  breakpoint_re_set_default (b);

  /* extra_string should never be non-NULL for dprintf.  */
  gdb_assert (b->extra_string != NULL);

  /* 1 - connect to target 1, that can run breakpoint commands.
     2 - create a dprintf, which resolves fine.
     3 - disconnect from target 1
     4 - connect to target 2, that can NOT run breakpoint commands.

     After steps #3/#4, you'll want the dprintf command list to
     be updated, because target 1 and 2 may well return different
     answers for target_can_run_breakpoint_commands().
     Given absence of finer grained resetting, we get to do
     it all the time.  */
  if (b->extra_string != NULL)
    update_dprintf_command_list (b);
}

/* Implement the "print_recreate" breakpoint_ops method for dprintf.  */

static void
dprintf_print_recreate (struct breakpoint *tp, struct ui_file *fp)
{
  fprintf_unfiltered (fp, "dprintf %s,%s",
		      event_location_to_string (tp->location.get ()),
		      tp->extra_string);
  print_recreate_thread (tp, fp);
}

/* Implement the "after_condition_true" breakpoint_ops method for
   dprintf.

   dprintf's are implemented with regular commands in their command
   list, but we run the commands here instead of before presenting the
   stop to the user, as dprintf's don't actually cause a stop.  This
   also makes it so that the commands of multiple dprintfs at the same
   address are all handled.  */

static void
dprintf_after_condition_true (struct bpstats *bs)
{
  struct bpstats tmp_bs;
  struct bpstats *tmp_bs_p = &tmp_bs;

  /* dprintf's never cause a stop.  This wasn't set in the
     check_status hook instead because that would make the dprintf's
     condition not be evaluated.  */
  bs->stop = 0;

  /* Run the command list here.  Take ownership of it instead of
     copying.  We never want these commands to run later in
     bpstat_do_actions, if a breakpoint that causes a stop happens to
     be set at same address as this dprintf, or even if running the
     commands here throws.  */
  tmp_bs.commands = bs->commands;
  bs->commands = NULL;

  bpstat_do_actions_1 (&tmp_bs_p);

  /* 'tmp_bs.commands' will usually be NULL by now, but
     bpstat_do_actions_1 may return early without processing the whole
     list.  */
}

/* The breakpoint_ops structure to be used on static tracepoints with
   markers (`-m').  */

static void
strace_marker_create_sals_from_location (const struct event_location *location,
					 struct linespec_result *canonical,
					 enum bptype type_wanted)
{
  struct linespec_sals lsal;
  const char *arg_start, *arg;

  arg = arg_start = get_linespec_location (location)->spec_string;
  lsal.sals = decode_static_tracepoint_spec (&arg);

  std::string str (arg_start, arg - arg_start);
  const char *ptr = str.c_str ();
  canonical->location
    = new_linespec_location (&ptr, symbol_name_match_type::FULL);

  lsal.canonical
    = xstrdup (event_location_to_string (canonical->location.get ()));
  canonical->lsals.push_back (std::move (lsal));
}

static void
strace_marker_create_breakpoints_sal (struct gdbarch *gdbarch,
				      struct linespec_result *canonical,
				      gdb::unique_xmalloc_ptr<char> cond_string,
				      gdb::unique_xmalloc_ptr<char> extra_string,
				      enum bptype type_wanted,
				      enum bpdisp disposition,
				      int thread,
				      int task, int ignore_count,
				      const struct breakpoint_ops *ops,
				      int from_tty, int enabled,
				      int internal, unsigned flags)
{
  const linespec_sals &lsal = canonical->lsals[0];

  /* If the user is creating a static tracepoint by marker id
     (strace -m MARKER_ID), then store the sals index, so that
     breakpoint_re_set can try to match up which of the newly
     found markers corresponds to this one, and, don't try to
     expand multiple locations for each sal, given than SALS
     already should contain all sals for MARKER_ID.  */

  for (size_t i = 0; i < lsal.sals.size (); i++)
    {
      event_location_up location
	= copy_event_location (canonical->location.get ());

      std::unique_ptr<tracepoint> tp (new tracepoint ());
      init_breakpoint_sal (tp.get (), gdbarch, lsal.sals[i],
			   std::move (location), NULL,
			   std::move (cond_string),
			   std::move (extra_string),
			   type_wanted, disposition,
			   thread, task, ignore_count, ops,
			   from_tty, enabled, internal, flags,
			   canonical->special_display);
      /* Given that its possible to have multiple markers with
	 the same string id, if the user is creating a static
	 tracepoint by marker id ("strace -m MARKER_ID"), then
	 store the sals index, so that breakpoint_re_set can
	 try to match up which of the newly found markers
	 corresponds to this one  */
      tp->static_trace_marker_id_idx = i;

      install_breakpoint (internal, std::move (tp), 0);
    }
}

static std::vector<symtab_and_line>
strace_marker_decode_location (struct breakpoint *b,
			       const struct event_location *location,
			       struct program_space *search_pspace)
{
  struct tracepoint *tp = (struct tracepoint *) b;
  const char *s = get_linespec_location (location)->spec_string;

  std::vector<symtab_and_line> sals = decode_static_tracepoint_spec (&s);
  if (sals.size () > tp->static_trace_marker_id_idx)
    {
      sals[0] = sals[tp->static_trace_marker_id_idx];
      sals.resize (1);
      return sals;
    }
  else
    error (_("marker %s not found"), tp->static_trace_marker_id.c_str ());
}

static struct breakpoint_ops strace_marker_breakpoint_ops;

static int
strace_marker_p (struct breakpoint *b)
{
  return b->ops == &strace_marker_breakpoint_ops;
}

/* Delete a breakpoint and clean up all traces of it in the data
   structures.  */

void
delete_breakpoint (struct breakpoint *bpt)
{
  struct breakpoint *b;

  gdb_assert (bpt != NULL);

  /* Has this bp already been deleted?  This can happen because
     multiple lists can hold pointers to bp's.  bpstat lists are
     especial culprits.

     One example of this happening is a watchpoint's scope bp.  When
     the scope bp triggers, we notice that the watchpoint is out of
     scope, and delete it.  We also delete its scope bp.  But the
     scope bp is marked "auto-deleting", and is already on a bpstat.
     That bpstat is then checked for auto-deleting bp's, which are
     deleted.

     A real solution to this problem might involve reference counts in
     bp's, and/or giving them pointers back to their referencing
     bpstat's, and teaching delete_breakpoint to only free a bp's
     storage when no more references were extent.  A cheaper bandaid
     was chosen.  */
  if (bpt->type == bp_none)
    return;

  /* At least avoid this stale reference until the reference counting
     of breakpoints gets resolved.  */
  if (bpt->related_breakpoint != bpt)
    {
      struct breakpoint *related;
      struct watchpoint *w;

      if (bpt->type == bp_watchpoint_scope)
	w = (struct watchpoint *) bpt->related_breakpoint;
      else if (bpt->related_breakpoint->type == bp_watchpoint_scope)
	w = (struct watchpoint *) bpt;
      else
	w = NULL;
      if (w != NULL)
	watchpoint_del_at_next_stop (w);

      /* Unlink bpt from the bpt->related_breakpoint ring.  */
      for (related = bpt; related->related_breakpoint != bpt;
	   related = related->related_breakpoint);
      related->related_breakpoint = bpt->related_breakpoint;
      bpt->related_breakpoint = bpt;
    }

  /* watch_command_1 creates a watchpoint but only sets its number if
     update_watchpoint succeeds in creating its bp_locations.  If there's
     a problem in that process, we'll be asked to delete the half-created
     watchpoint.  In that case, don't announce the deletion.  */
  if (bpt->number)
    gdb::observers::breakpoint_deleted.notify (bpt);

  if (breakpoint_chain == bpt)
    breakpoint_chain = bpt->next;

  ALL_BREAKPOINTS (b)
    if (b->next == bpt)
    {
      b->next = bpt->next;
      break;
    }

  /* Be sure no bpstat's are pointing at the breakpoint after it's
     been freed.  */
  /* FIXME, how can we find all bpstat's?  We just check stop_bpstat
     in all threads for now.  Note that we cannot just remove bpstats
     pointing at bpt from the stop_bpstat list entirely, as breakpoint
     commands are associated with the bpstat; if we remove it here,
     then the later call to bpstat_do_actions (&stop_bpstat); in
     event-top.c won't do anything, and temporary breakpoints with
     commands won't work.  */

  iterate_over_threads (bpstat_remove_breakpoint_callback, bpt);

  /* Now that breakpoint is removed from breakpoint list, update the
     global location list.  This will remove locations that used to
     belong to this breakpoint.  Do this before freeing the breakpoint
     itself, since remove_breakpoint looks at location's owner.  It
     might be better design to have location completely
     self-contained, but it's not the case now.  */
  update_global_location_list (UGLL_DONT_INSERT);

  /* On the chance that someone will soon try again to delete this
     same bp, we mark it as deleted before freeing its storage.  */
  bpt->type = bp_none;
  delete bpt;
}

/* Iterator function to call a user-provided callback function once
   for each of B and its related breakpoints.  */

static void
iterate_over_related_breakpoints (struct breakpoint *b,
				  gdb::function_view<void (breakpoint *)> function)
{
  struct breakpoint *related;

  related = b;
  do
    {
      struct breakpoint *next;

      /* FUNCTION may delete RELATED.  */
      next = related->related_breakpoint;

      if (next == related)
	{
	  /* RELATED is the last ring entry.  */
	  function (related);

	  /* FUNCTION may have deleted it, so we'd never reach back to
	     B.  There's nothing left to do anyway, so just break
	     out.  */
	  break;
	}
      else
	function (related);

      related = next;
    }
  while (related != b);
}

static void
delete_command (const char *arg, int from_tty)
{
  struct breakpoint *b, *b_tmp;

  dont_repeat ();

  if (arg == 0)
    {
      int breaks_to_delete = 0;

      /* Delete all breakpoints if no argument.  Do not delete
         internal breakpoints, these have to be deleted with an
         explicit breakpoint number argument.  */
      ALL_BREAKPOINTS (b)
	if (user_breakpoint_p (b))
	  {
	    breaks_to_delete = 1;
	    break;
	  }

      /* Ask user only if there are some breakpoints to delete.  */
      if (!from_tty
	  || (breaks_to_delete && query (_("Delete all breakpoints? "))))
	{
	  ALL_BREAKPOINTS_SAFE (b, b_tmp)
	    if (user_breakpoint_p (b))
	      delete_breakpoint (b);
	}
    }
  else
    map_breakpoint_numbers
      (arg, [&] (breakpoint *b)
       {
	 iterate_over_related_breakpoints (b, delete_breakpoint);
       });
}

/* Return true if all locations of B bound to PSPACE are pending.  If
   PSPACE is NULL, all locations of all program spaces are
   considered.  */

static int
all_locations_are_pending (struct breakpoint *b, struct program_space *pspace)
{
  struct bp_location *loc;

  for (loc = b->loc; loc != NULL; loc = loc->next)
    if ((pspace == NULL
	 || loc->pspace == pspace)
	&& !loc->shlib_disabled
	&& !loc->pspace->executing_startup)
      return 0;
  return 1;
}

/* Subroutine of update_breakpoint_locations to simplify it.
   Return non-zero if multiple fns in list LOC have the same name.
   Null names are ignored.  */

static int
ambiguous_names_p (struct bp_location *loc)
{
  struct bp_location *l;
  htab_t htab = htab_create_alloc (13, htab_hash_string, streq_hash, NULL,
				   xcalloc, xfree);

  for (l = loc; l != NULL; l = l->next)
    {
      const char **slot;
      const char *name = l->function_name;

      /* Allow for some names to be NULL, ignore them.  */
      if (name == NULL)
	continue;

      slot = (const char **) htab_find_slot (htab, (const void *) name,
					     INSERT);
      /* NOTE: We can assume slot != NULL here because xcalloc never
	 returns NULL.  */
      if (*slot != NULL)
	{
	  htab_delete (htab);
	  return 1;
	}
      *slot = name;
    }

  htab_delete (htab);
  return 0;
}

/* When symbols change, it probably means the sources changed as well,
   and it might mean the static tracepoint markers are no longer at
   the same address or line numbers they used to be at last we
   checked.  Losing your static tracepoints whenever you rebuild is
   undesirable.  This function tries to resync/rematch gdb static
   tracepoints with the markers on the target, for static tracepoints
   that have not been set by marker id.  Static tracepoint that have
   been set by marker id are reset by marker id in breakpoint_re_set.
   The heuristic is:

   1) For a tracepoint set at a specific address, look for a marker at
   the old PC.  If one is found there, assume to be the same marker.
   If the name / string id of the marker found is different from the
   previous known name, assume that means the user renamed the marker
   in the sources, and output a warning.

   2) For a tracepoint set at a given line number, look for a marker
   at the new address of the old line number.  If one is found there,
   assume to be the same marker.  If the name / string id of the
   marker found is different from the previous known name, assume that
   means the user renamed the marker in the sources, and output a
   warning.

   3) If a marker is no longer found at the same address or line, it
   may mean the marker no longer exists.  But it may also just mean
   the code changed a bit.  Maybe the user added a few lines of code
   that made the marker move up or down (in line number terms).  Ask
   the target for info about the marker with the string id as we knew
   it.  If found, update line number and address in the matching
   static tracepoint.  This will get confused if there's more than one
   marker with the same ID (possible in UST, although unadvised
   precisely because it confuses tools).  */

static struct symtab_and_line
update_static_tracepoint (struct breakpoint *b, struct symtab_and_line sal)
{
  struct tracepoint *tp = (struct tracepoint *) b;
  struct static_tracepoint_marker marker;
  CORE_ADDR pc;

  pc = sal.pc;
  if (sal.line)
    find_line_pc (sal.symtab, sal.line, &pc);

  if (target_static_tracepoint_marker_at (pc, &marker))
    {
      if (tp->static_trace_marker_id != marker.str_id)
	warning (_("static tracepoint %d changed probed marker from %s to %s"),
		 b->number, tp->static_trace_marker_id.c_str (),
		 marker.str_id.c_str ());

      tp->static_trace_marker_id = std::move (marker.str_id);

      return sal;
    }

  /* Old marker wasn't found on target at lineno.  Try looking it up
     by string ID.  */
  if (!sal.explicit_pc
      && sal.line != 0
      && sal.symtab != NULL
      && !tp->static_trace_marker_id.empty ())
    {
      std::vector<static_tracepoint_marker> markers
	= target_static_tracepoint_markers_by_strid
	    (tp->static_trace_marker_id.c_str ());

      if (!markers.empty ())
	{
	  struct symbol *sym;
	  struct static_tracepoint_marker *tpmarker;
	  struct ui_out *uiout = current_uiout;
	  struct explicit_location explicit_loc;

	  tpmarker = &markers[0];

	  tp->static_trace_marker_id = std::move (tpmarker->str_id);

	  warning (_("marker for static tracepoint %d (%s) not "
		     "found at previous line number"),
		   b->number, tp->static_trace_marker_id.c_str ());

	  symtab_and_line sal2 = find_pc_line (tpmarker->address, 0);
	  sym = find_pc_sect_function (tpmarker->address, NULL);
	  uiout->text ("Now in ");
	  if (sym)
	    {
	      uiout->field_string ("func", SYMBOL_PRINT_NAME (sym));
	      uiout->text (" at ");
	    }
	  uiout->field_string ("file",
			       symtab_to_filename_for_display (sal2.symtab));
	  uiout->text (":");

	  if (uiout->is_mi_like_p ())
	    {
	      const char *fullname = symtab_to_fullname (sal2.symtab);

	      uiout->field_string ("fullname", fullname);
	    }

	  uiout->field_int ("line", sal2.line);
	  uiout->text ("\n");

	  b->loc->line_number = sal2.line;
	  b->loc->symtab = sym != NULL ? sal2.symtab : NULL;

	  b->location.reset (NULL);
	  initialize_explicit_location (&explicit_loc);
	  explicit_loc.source_filename
	    = ASTRDUP (symtab_to_filename_for_display (sal2.symtab));
	  explicit_loc.line_offset.offset = b->loc->line_number;
	  explicit_loc.line_offset.sign = LINE_OFFSET_NONE;
	  b->location = new_explicit_location (&explicit_loc);

	  /* Might be nice to check if function changed, and warn if
	     so.  */
	}
    }
  return sal;
}

/* Returns 1 iff locations A and B are sufficiently same that
   we don't need to report breakpoint as changed.  */

static int
locations_are_equal (struct bp_location *a, struct bp_location *b)
{
  while (a && b)
    {
      if (a->address != b->address)
	return 0;

      if (a->shlib_disabled != b->shlib_disabled)
	return 0;

      if (a->enabled != b->enabled)
	return 0;

      a = a->next;
      b = b->next;
    }

  if ((a == NULL) != (b == NULL))
    return 0;

  return 1;
}

/* Split all locations of B that are bound to PSPACE out of B's
   location list to a separate list and return that list's head.  If
   PSPACE is NULL, hoist out all locations of B.  */

static struct bp_location *
hoist_existing_locations (struct breakpoint *b, struct program_space *pspace)
{
  struct bp_location head;
  struct bp_location *i = b->loc;
  struct bp_location **i_link = &b->loc;
  struct bp_location *hoisted = &head;

  if (pspace == NULL)
    {
      i = b->loc;
      b->loc = NULL;
      return i;
    }

  head.next = NULL;

  while (i != NULL)
    {
      if (i->pspace == pspace)
	{
	  *i_link = i->next;
	  i->next = NULL;
	  hoisted->next = i;
	  hoisted = i;
	}
      else
	i_link = &i->next;
      i = *i_link;
    }

  return head.next;
}

/* Create new breakpoint locations for B (a hardware or software
   breakpoint) based on SALS and SALS_END.  If SALS_END.NELTS is not
   zero, then B is a ranged breakpoint.  Only recreates locations for
   FILTER_PSPACE.  Locations of other program spaces are left
   untouched.  */

void
update_breakpoint_locations (struct breakpoint *b,
			     struct program_space *filter_pspace,
			     gdb::array_view<const symtab_and_line> sals,
			     gdb::array_view<const symtab_and_line> sals_end)
{
  struct bp_location *existing_locations;

  if (!sals_end.empty () && (sals.size () != 1 || sals_end.size () != 1))
    {
      /* Ranged breakpoints have only one start location and one end
	 location.  */
      b->enable_state = bp_disabled;
      printf_unfiltered (_("Could not reset ranged breakpoint %d: "
			   "multiple locations found\n"),
			 b->number);
      return;
    }

  /* If there's no new locations, and all existing locations are
     pending, don't do anything.  This optimizes the common case where
     all locations are in the same shared library, that was unloaded.
     We'd like to retain the location, so that when the library is
     loaded again, we don't loose the enabled/disabled status of the
     individual locations.  */
  if (all_locations_are_pending (b, filter_pspace) && sals.empty ())
    return;

  existing_locations = hoist_existing_locations (b, filter_pspace);

  for (const auto &sal : sals)
    {
      struct bp_location *new_loc;

      switch_to_program_space_and_thread (sal.pspace);

      new_loc = add_location_to_breakpoint (b, &sal);

      /* Reparse conditions, they might contain references to the
	 old symtab.  */
      if (b->cond_string != NULL)
	{
	  const char *s;

	  s = b->cond_string;
	  TRY
	    {
	      new_loc->cond = parse_exp_1 (&s, sal.pc,
					   block_for_pc (sal.pc),
					   0);
	    }
	  CATCH (e, RETURN_MASK_ERROR)
	    {
	      warning (_("failed to reevaluate condition "
			 "for breakpoint %d: %s"), 
		       b->number, e.message);
	      new_loc->enabled = 0;
	    }
	  END_CATCH
	}

      if (!sals_end.empty ())
	{
	  CORE_ADDR end = find_breakpoint_range_end (sals_end[0]);

	  new_loc->length = end - sals[0].pc + 1;
	}
    }

  /* If possible, carry over 'disable' status from existing
     breakpoints.  */
  {
    struct bp_location *e = existing_locations;
    /* If there are multiple breakpoints with the same function name,
       e.g. for inline functions, comparing function names won't work.
       Instead compare pc addresses; this is just a heuristic as things
       may have moved, but in practice it gives the correct answer
       often enough until a better solution is found.  */
    int have_ambiguous_names = ambiguous_names_p (b->loc);

    for (; e; e = e->next)
      {
	if (!e->enabled && e->function_name)
	  {
	    struct bp_location *l = b->loc;
	    if (have_ambiguous_names)
	      {
		for (; l; l = l->next)
		  if (breakpoint_locations_match (e, l))
		    {
		      l->enabled = 0;
		      break;
		    }
	      }
	    else
	      {
		for (; l; l = l->next)
		  if (l->function_name
		      && strcmp (e->function_name, l->function_name) == 0)
		    {
		      l->enabled = 0;
		      break;
		    }
	      }
	  }
      }
  }

  if (!locations_are_equal (existing_locations, b->loc))
    gdb::observers::breakpoint_modified.notify (b);
}

/* Find the SaL locations corresponding to the given LOCATION.
   On return, FOUND will be 1 if any SaL was found, zero otherwise.  */

static std::vector<symtab_and_line>
location_to_sals (struct breakpoint *b, struct event_location *location,
		  struct program_space *search_pspace, int *found)
{
  struct gdb_exception exception = exception_none;

  gdb_assert (b->ops != NULL);

  std::vector<symtab_and_line> sals;

  TRY
    {
      sals = b->ops->decode_location (b, location, search_pspace);
    }
  CATCH (e, RETURN_MASK_ERROR)
    {
      int not_found_and_ok = 0;

      exception = e;

      /* For pending breakpoints, it's expected that parsing will
	 fail until the right shared library is loaded.  User has
	 already told to create pending breakpoints and don't need
	 extra messages.  If breakpoint is in bp_shlib_disabled
	 state, then user already saw the message about that
	 breakpoint being disabled, and don't want to see more
	 errors.  */
      if (e.error == NOT_FOUND_ERROR
	  && (b->condition_not_parsed
	      || (b->loc != NULL
		  && search_pspace != NULL
		  && b->loc->pspace != search_pspace)
	      || (b->loc && b->loc->shlib_disabled)
	      || (b->loc && b->loc->pspace->executing_startup)
	      || b->enable_state == bp_disabled))
	not_found_and_ok = 1;

      if (!not_found_and_ok)
	{
	  /* We surely don't want to warn about the same breakpoint
	     10 times.  One solution, implemented here, is disable
	     the breakpoint on error.  Another solution would be to
	     have separate 'warning emitted' flag.  Since this
	     happens only when a binary has changed, I don't know
	     which approach is better.  */
	  b->enable_state = bp_disabled;
	  throw_exception (e);
	}
    }
  END_CATCH

  if (exception.reason == 0 || exception.error != NOT_FOUND_ERROR)
    {
      for (auto &sal : sals)
	resolve_sal_pc (&sal);
      if (b->condition_not_parsed && b->extra_string != NULL)
	{
	  char *cond_string, *extra_string;
	  int thread, task;

	  find_condition_and_thread (b->extra_string, sals[0].pc,
				     &cond_string, &thread, &task,
				     &extra_string);
	  gdb_assert (b->cond_string == NULL);
	  if (cond_string)
	    b->cond_string = cond_string;
	  b->thread = thread;
	  b->task = task;
	  if (extra_string)
	    {
	      xfree (b->extra_string);
	      b->extra_string = extra_string;
	    }
	  b->condition_not_parsed = 0;
	}

      if (b->type == bp_static_tracepoint && !strace_marker_p (b))
	sals[0] = update_static_tracepoint (b, sals[0]);

      *found = 1;
    }
  else
    *found = 0;

  return sals;
}

/* The default re_set method, for typical hardware or software
   breakpoints.  Reevaluate the breakpoint and recreate its
   locations.  */

static void
breakpoint_re_set_default (struct breakpoint *b)
{
  struct program_space *filter_pspace = current_program_space;
  std::vector<symtab_and_line> expanded, expanded_end;

  int found;
  std::vector<symtab_and_line> sals = location_to_sals (b, b->location.get (),
							filter_pspace, &found);
  if (found)
    expanded = std::move (sals);

  if (b->location_range_end != NULL)
    {
      std::vector<symtab_and_line> sals_end
	= location_to_sals (b, b->location_range_end.get (),
			    filter_pspace, &found);
      if (found)
	expanded_end = std::move (sals_end);
    }

  update_breakpoint_locations (b, filter_pspace, expanded, expanded_end);
}

/* Default method for creating SALs from an address string.  It basically
   calls parse_breakpoint_sals.  Return 1 for success, zero for failure.  */

static void
create_sals_from_location_default (const struct event_location *location,
				   struct linespec_result *canonical,
				   enum bptype type_wanted)
{
  parse_breakpoint_sals (location, canonical);
}

/* Call create_breakpoints_sal for the given arguments.  This is the default
   function for the `create_breakpoints_sal' method of
   breakpoint_ops.  */

static void
create_breakpoints_sal_default (struct gdbarch *gdbarch,
				struct linespec_result *canonical,
				gdb::unique_xmalloc_ptr<char> cond_string,
				gdb::unique_xmalloc_ptr<char> extra_string,
				enum bptype type_wanted,
				enum bpdisp disposition,
				int thread,
				int task, int ignore_count,
				const struct breakpoint_ops *ops,
				int from_tty, int enabled,
				int internal, unsigned flags)
{
  create_breakpoints_sal (gdbarch, canonical,
			  std::move (cond_string),
			  std::move (extra_string),
			  type_wanted, disposition,
			  thread, task, ignore_count, ops, from_tty,
			  enabled, internal, flags);
}

/* Decode the line represented by S by calling decode_line_full.  This is the
   default function for the `decode_location' method of breakpoint_ops.  */

static std::vector<symtab_and_line>
decode_location_default (struct breakpoint *b,
			 const struct event_location *location,
			 struct program_space *search_pspace)
{
  struct linespec_result canonical;

  decode_line_full (location, DECODE_LINE_FUNFIRSTLINE, search_pspace,
		    (struct symtab *) NULL, 0,
		    &canonical, multiple_symbols_all,
		    b->filter);

  /* We should get 0 or 1 resulting SALs.  */
  gdb_assert (canonical.lsals.size () < 2);

  if (!canonical.lsals.empty ())
    {
      const linespec_sals &lsal = canonical.lsals[0];
      return std::move (lsal.sals);
    }
  return {};
}

/* Reset a breakpoint.  */

static void
breakpoint_re_set_one (breakpoint *b)
{
  input_radix = b->input_radix;
  set_language (b->language);

  b->ops->re_set (b);
}

/* Re-set breakpoint locations for the current program space.
   Locations bound to other program spaces are left untouched.  */

void
breakpoint_re_set (void)
{
  struct breakpoint *b, *b_tmp;

  {
    scoped_restore_current_language save_language;
    scoped_restore save_input_radix = make_scoped_restore (&input_radix);
    scoped_restore_current_pspace_and_thread restore_pspace_thread;

    /* Note: we must not try to insert locations until after all
       breakpoints have been re-set.  Otherwise, e.g., when re-setting
       breakpoint 1, we'd insert the locations of breakpoint 2, which
       hadn't been re-set yet, and thus may have stale locations.  */

    ALL_BREAKPOINTS_SAFE (b, b_tmp)
      {
	TRY
	  {
	    breakpoint_re_set_one (b);
	  }
	CATCH (ex, RETURN_MASK_ALL)
	  {
	    exception_fprintf (gdb_stderr, ex,
			       "Error in re-setting breakpoint %d: ",
			       b->number);
	  }
	END_CATCH
      }

    jit_breakpoint_re_set ();
  }

  create_overlay_event_breakpoint ();
  create_longjmp_master_breakpoint ();
  create_std_terminate_master_breakpoint ();
  create_exception_master_breakpoint ();

  /* Now we can insert.  */
  update_global_location_list (UGLL_MAY_INSERT);
}

/* Reset the thread number of this breakpoint:

   - If the breakpoint is for all threads, leave it as-is.
   - Else, reset it to the current thread for inferior_ptid.  */
void
breakpoint_re_set_thread (struct breakpoint *b)
{
  if (b->thread != -1)
    {
      if (in_thread_list (inferior_ptid))
	b->thread = ptid_to_global_thread_id (inferior_ptid);

      /* We're being called after following a fork.  The new fork is
	 selected as current, and unless this was a vfork will have a
	 different program space from the original thread.  Reset that
	 as well.  */
      b->loc->pspace = current_program_space;
    }
}

/* Set ignore-count of breakpoint number BPTNUM to COUNT.
   If from_tty is nonzero, it prints a message to that effect,
   which ends with a period (no newline).  */

void
set_ignore_count (int bptnum, int count, int from_tty)
{
  struct breakpoint *b;

  if (count < 0)
    count = 0;

  ALL_BREAKPOINTS (b)
    if (b->number == bptnum)
    {
      if (is_tracepoint (b))
	{
	  if (from_tty && count != 0)
	    printf_filtered (_("Ignore count ignored for tracepoint %d."),
			     bptnum);
	  return;
	}
      
      b->ignore_count = count;
      if (from_tty)
	{
	  if (count == 0)
	    printf_filtered (_("Will stop next time "
			       "breakpoint %d is reached."),
			     bptnum);
	  else if (count == 1)
	    printf_filtered (_("Will ignore next crossing of breakpoint %d."),
			     bptnum);
	  else
	    printf_filtered (_("Will ignore next %d "
			       "crossings of breakpoint %d."),
			     count, bptnum);
	}
      gdb::observers::breakpoint_modified.notify (b);
      return;
    }

  error (_("No breakpoint number %d."), bptnum);
}

/* Command to set ignore-count of breakpoint N to COUNT.  */

static void
ignore_command (const char *args, int from_tty)
{
  const char *p = args;
  int num;

  if (p == 0)
    error_no_arg (_("a breakpoint number"));

  num = get_number (&p);
  if (num == 0)
    error (_("bad breakpoint number: '%s'"), args);
  if (*p == 0)
    error (_("Second argument (specified ignore-count) is missing."));

  set_ignore_count (num,
		    longest_to_int (value_as_long (parse_and_eval (p))),
		    from_tty);
  if (from_tty)
    printf_filtered ("\n");
}


/* Call FUNCTION on each of the breakpoints with numbers in the range
   defined by BP_NUM_RANGE (an inclusive range).  */

static void
map_breakpoint_number_range (std::pair<int, int> bp_num_range,
			     gdb::function_view<void (breakpoint *)> function)
{
  if (bp_num_range.first == 0)
    {
      warning (_("bad breakpoint number at or near '%d'"),
	       bp_num_range.first);
    }
  else
    {
      struct breakpoint *b, *tmp;

      for (int i = bp_num_range.first; i <= bp_num_range.second; i++)
	{
	  bool match = false;

	  ALL_BREAKPOINTS_SAFE (b, tmp)
	    if (b->number == i)
	      {
		match = true;
		function (b);
		break;
	      }
	  if (!match)
	    printf_unfiltered (_("No breakpoint number %d.\n"), i);
	}
    }
}

/* Call FUNCTION on each of the breakpoints whose numbers are given in
   ARGS.  */

static void
map_breakpoint_numbers (const char *args,
			gdb::function_view<void (breakpoint *)> function)
{
  if (args == NULL || *args == '\0')
    error_no_arg (_("one or more breakpoint numbers"));

  number_or_range_parser parser (args);

  while (!parser.finished ())
    {
      int num = parser.get_number ();
      map_breakpoint_number_range (std::make_pair (num, num), function);
    }
}

/* Return the breakpoint location structure corresponding to the
   BP_NUM and LOC_NUM values.  */

static struct bp_location *
find_location_by_number (int bp_num, int loc_num)
{
  struct breakpoint *b;

  ALL_BREAKPOINTS (b)
    if (b->number == bp_num)
      {
	break;
      }

  if (!b || b->number != bp_num)
    error (_("Bad breakpoint number '%d'"), bp_num);
  
  if (loc_num == 0)
    error (_("Bad breakpoint location number '%d'"), loc_num);

  int n = 0;
  for (bp_location *loc = b->loc; loc != NULL; loc = loc->next)
    if (++n == loc_num)
      return loc;

  error (_("Bad breakpoint location number '%d'"), loc_num);
}

/* Modes of operation for extract_bp_num.  */
enum class extract_bp_kind
{
  /* Extracting a breakpoint number.  */
  bp,

  /* Extracting a location number.  */
  loc,
};

/* Extract a breakpoint or location number (as determined by KIND)
   from the string starting at START.  TRAILER is a character which
   can be found after the number.  If you don't want a trailer, use
   '\0'.  If END_OUT is not NULL, it is set to point after the parsed
   string.  This always returns a positive integer.  */

static int
extract_bp_num (extract_bp_kind kind, const char *start,
		int trailer, const char **end_out = NULL)
{
  const char *end = start;
  int num = get_number_trailer (&end, trailer);
  if (num < 0)
    error (kind == extract_bp_kind::bp
	   ? _("Negative breakpoint number '%.*s'")
	   : _("Negative breakpoint location number '%.*s'"),
	   int (end - start), start);
  if (num == 0)
    error (kind == extract_bp_kind::bp
	   ? _("Bad breakpoint number '%.*s'")
	   : _("Bad breakpoint location number '%.*s'"),
	   int (end - start), start);

  if (end_out != NULL)
    *end_out = end;
  return num;
}

/* Extract a breakpoint or location range (as determined by KIND) in
   the form NUM1-NUM2 stored at &ARG[arg_offset].  Returns a std::pair
   representing the (inclusive) range.  The returned pair's elements
   are always positive integers.  */

static std::pair<int, int>
extract_bp_or_bp_range (extract_bp_kind kind,
			const std::string &arg,
			std::string::size_type arg_offset)
{
  std::pair<int, int> range;
  const char *bp_loc = &arg[arg_offset];
  std::string::size_type dash = arg.find ('-', arg_offset);
  if (dash != std::string::npos)
    {
      /* bp_loc is a range (x-z).  */
      if (arg.length () == dash + 1)
	error (kind == extract_bp_kind::bp
	       ? _("Bad breakpoint number at or near: '%s'")
	       : _("Bad breakpoint location number at or near: '%s'"),
	       bp_loc);

      const char *end;
      const char *start_first = bp_loc;
      const char *start_second = &arg[dash + 1];
      range.first = extract_bp_num (kind, start_first, '-');
      range.second = extract_bp_num (kind, start_second, '\0', &end);

      if (range.first > range.second)
	error (kind == extract_bp_kind::bp
	       ? _("Inverted breakpoint range at '%.*s'")
	       : _("Inverted breakpoint location range at '%.*s'"),
	       int (end - start_first), start_first);
    }
  else
    {
      /* bp_loc is a single value.  */
      range.first = extract_bp_num (kind, bp_loc, '\0');
      range.second = range.first;
    }
  return range;
}

/* Extract the breakpoint/location range specified by ARG.  Returns
   the breakpoint range in BP_NUM_RANGE, and the location range in
   BP_LOC_RANGE.

   ARG may be in any of the following forms:

   x     where 'x' is a breakpoint number.
   x-y   where 'x' and 'y' specify a breakpoint numbers range.
   x.y   where 'x' is a breakpoint number and 'y' a location number.
   x.y-z where 'x' is a breakpoint number and 'y' and 'z' specify a
	 location number range.
*/

static void
extract_bp_number_and_location (const std::string &arg,
				std::pair<int, int> &bp_num_range,
				std::pair<int, int> &bp_loc_range)
{
  std::string::size_type dot = arg.find ('.');

  if (dot != std::string::npos)
    {
      /* Handle 'x.y' and 'x.y-z' cases.  */

      if (arg.length () == dot + 1 || dot == 0)
	error (_("Bad breakpoint number at or near: '%s'"), arg.c_str ());

      bp_num_range.first
	= extract_bp_num (extract_bp_kind::bp, arg.c_str (), '.');
      bp_num_range.second = bp_num_range.first;

      bp_loc_range = extract_bp_or_bp_range (extract_bp_kind::loc,
					     arg, dot + 1);
    }
  else
    {
      /* Handle x and x-y cases.  */

      bp_num_range = extract_bp_or_bp_range (extract_bp_kind::bp, arg, 0);
      bp_loc_range.first = 0;
      bp_loc_range.second = 0;
    }
}

/* Enable or disable a breakpoint location BP_NUM.LOC_NUM.  ENABLE
   specifies whether to enable or disable.  */

static void
enable_disable_bp_num_loc (int bp_num, int loc_num, bool enable)
{
  struct bp_location *loc = find_location_by_number (bp_num, loc_num);
  if (loc != NULL)
    {
      if (loc->enabled != enable)
	{
	  loc->enabled = enable;
	  mark_breakpoint_location_modified (loc);
	}
      if (target_supports_enable_disable_tracepoint ()
	  && current_trace_status ()->running && loc->owner
	  && is_tracepoint (loc->owner))
	target_disable_tracepoint (loc);
    }
  update_global_location_list (UGLL_DONT_INSERT);
}

/* Enable or disable a range of breakpoint locations.  BP_NUM is the
   number of the breakpoint, and BP_LOC_RANGE specifies the
   (inclusive) range of location numbers of that breakpoint to
   enable/disable.  ENABLE specifies whether to enable or disable the
   location.  */

static void
enable_disable_breakpoint_location_range (int bp_num,
					  std::pair<int, int> &bp_loc_range,
					  bool enable)
{
  for (int i = bp_loc_range.first; i <= bp_loc_range.second; i++)
    enable_disable_bp_num_loc (bp_num, i, enable);
}

/* Set ignore-count of breakpoint number BPTNUM to COUNT.
   If from_tty is nonzero, it prints a message to that effect,
   which ends with a period (no newline).  */

void
disable_breakpoint (struct breakpoint *bpt)
{
  /* Never disable a watchpoint scope breakpoint; we want to
     hit them when we leave scope so we can delete both the
     watchpoint and its scope breakpoint at that time.  */
  if (bpt->type == bp_watchpoint_scope)
    return;

  bpt->enable_state = bp_disabled;

  /* Mark breakpoint locations modified.  */
  mark_breakpoint_modified (bpt);

  if (target_supports_enable_disable_tracepoint ()
      && current_trace_status ()->running && is_tracepoint (bpt))
    {
      struct bp_location *location;
     
      for (location = bpt->loc; location; location = location->next)
	target_disable_tracepoint (location);
    }

  update_global_location_list (UGLL_DONT_INSERT);

  gdb::observers::breakpoint_modified.notify (bpt);
}

/* Enable or disable the breakpoint(s) or breakpoint location(s)
   specified in ARGS.  ARGS may be in any of the formats handled by
   extract_bp_number_and_location.  ENABLE specifies whether to enable
   or disable the breakpoints/locations.  */

static void
enable_disable_command (const char *args, int from_tty, bool enable)
{
  if (args == 0)
    {
      struct breakpoint *bpt;

      ALL_BREAKPOINTS (bpt)
	if (user_breakpoint_p (bpt))
	  {
	    if (enable)
	      enable_breakpoint (bpt);
	    else
	      disable_breakpoint (bpt);
	  }
    }
  else
    {
      std::string num = extract_arg (&args);

      while (!num.empty ())
	{
	  std::pair<int, int> bp_num_range, bp_loc_range;

	  extract_bp_number_and_location (num, bp_num_range, bp_loc_range);

	  if (bp_loc_range.first == bp_loc_range.second
	      && bp_loc_range.first == 0)
	    {
	      /* Handle breakpoint ids with formats 'x' or 'x-z'.  */
	      map_breakpoint_number_range (bp_num_range,
					   enable
					   ? enable_breakpoint
					   : disable_breakpoint);
	    }
	  else
	    {
	      /* Handle breakpoint ids with formats 'x.y' or
		 'x.y-z'.  */
	      enable_disable_breakpoint_location_range
		(bp_num_range.first, bp_loc_range, enable);
	    }
	  num = extract_arg (&args);
	}
    }
}

/* The disable command disables the specified breakpoints/locations
   (or all defined breakpoints) so they're no longer effective in
   stopping the inferior.  ARGS may be in any of the forms defined in
   extract_bp_number_and_location.  */

static void
disable_command (const char *args, int from_tty)
{
  enable_disable_command (args, from_tty, false);
}

static void
enable_breakpoint_disp (struct breakpoint *bpt, enum bpdisp disposition,
			int count)
{
  int target_resources_ok;

  if (bpt->type == bp_hardware_breakpoint)
    {
      int i;
      i = hw_breakpoint_used_count ();
      target_resources_ok = 
	target_can_use_hardware_watchpoint (bp_hardware_breakpoint, 
					    i + 1, 0);
      if (target_resources_ok == 0)
	error (_("No hardware breakpoint support in the target."));
      else if (target_resources_ok < 0)
	error (_("Hardware breakpoints used exceeds limit."));
    }

  if (is_watchpoint (bpt))
    {
      /* Initialize it just to avoid a GCC false warning.  */
      enum enable_state orig_enable_state = bp_disabled;

      TRY
	{
	  struct watchpoint *w = (struct watchpoint *) bpt;

	  orig_enable_state = bpt->enable_state;
	  bpt->enable_state = bp_enabled;
	  update_watchpoint (w, 1 /* reparse */);
	}
      CATCH (e, RETURN_MASK_ALL)
	{
	  bpt->enable_state = orig_enable_state;
	  exception_fprintf (gdb_stderr, e, _("Cannot enable watchpoint %d: "),
			     bpt->number);
	  return;
	}
      END_CATCH
    }

  bpt->enable_state = bp_enabled;

  /* Mark breakpoint locations modified.  */
  mark_breakpoint_modified (bpt);

  if (target_supports_enable_disable_tracepoint ()
      && current_trace_status ()->running && is_tracepoint (bpt))
    {
      struct bp_location *location;

      for (location = bpt->loc; location; location = location->next)
	target_enable_tracepoint (location);
    }

  bpt->disposition = disposition;
  bpt->enable_count = count;
  update_global_location_list (UGLL_MAY_INSERT);

  gdb::observers::breakpoint_modified.notify (bpt);
}


void
enable_breakpoint (struct breakpoint *bpt)
{
  enable_breakpoint_disp (bpt, bpt->disposition, 0);
}

/* The enable command enables the specified breakpoints/locations (or
   all defined breakpoints) so they once again become (or continue to
   be) effective in stopping the inferior.  ARGS may be in any of the
   forms defined in extract_bp_number_and_location.  */

static void
enable_command (const char *args, int from_tty)
{
  enable_disable_command (args, from_tty, true);
}

static void
enable_once_command (const char *args, int from_tty)
{
  map_breakpoint_numbers
    (args, [&] (breakpoint *b)
     {
       iterate_over_related_breakpoints
	 (b, [&] (breakpoint *bpt)
	  {
	    enable_breakpoint_disp (bpt, disp_disable, 1);
	  });
     });
}

static void
enable_count_command (const char *args, int from_tty)
{
  int count;

  if (args == NULL)
    error_no_arg (_("hit count"));

  count = get_number (&args);

  map_breakpoint_numbers
    (args, [&] (breakpoint *b)
     {
       iterate_over_related_breakpoints
	 (b, [&] (breakpoint *bpt)
	  {
	    enable_breakpoint_disp (bpt, disp_disable, count);
	  });
     });
}

static void
enable_delete_command (const char *args, int from_tty)
{
  map_breakpoint_numbers
    (args, [&] (breakpoint *b)
     {
       iterate_over_related_breakpoints
	 (b, [&] (breakpoint *bpt)
	  {
	    enable_breakpoint_disp (bpt, disp_del, 1);
	  });
     });
}

static void
set_breakpoint_cmd (const char *args, int from_tty)
{
}

static void
show_breakpoint_cmd (const char *args, int from_tty)
{
}

/* Invalidate last known value of any hardware watchpoint if
   the memory which that value represents has been written to by
   GDB itself.  */

static void
invalidate_bp_value_on_memory_change (struct inferior *inferior,
				      CORE_ADDR addr, ssize_t len,
				      const bfd_byte *data)
{
  struct breakpoint *bp;

  ALL_BREAKPOINTS (bp)
    if (bp->enable_state == bp_enabled
	&& bp->type == bp_hardware_watchpoint)
      {
	struct watchpoint *wp = (struct watchpoint *) bp;

	if (wp->val_valid && wp->val != nullptr)
	  {
	    struct bp_location *loc;

	    for (loc = bp->loc; loc != NULL; loc = loc->next)
	      if (loc->loc_type == bp_loc_hardware_watchpoint
		  && loc->address + loc->length > addr
		  && addr + len > loc->address)
		{
		  wp->val = NULL;
		  wp->val_valid = 0;
		}
	  }
      }
}

/* Create and insert a breakpoint for software single step.  */

void
insert_single_step_breakpoint (struct gdbarch *gdbarch,
			       const address_space *aspace,
			       CORE_ADDR next_pc)
{
  struct thread_info *tp = inferior_thread ();
  struct symtab_and_line sal;
  CORE_ADDR pc = next_pc;

  if (tp->control.single_step_breakpoints == NULL)
    {
      tp->control.single_step_breakpoints
	= new_single_step_breakpoint (tp->global_num, gdbarch);
    }

  sal = find_pc_line (pc, 0);
  sal.pc = pc;
  sal.section = find_pc_overlay (pc);
  sal.explicit_pc = 1;
  add_location_to_breakpoint (tp->control.single_step_breakpoints, &sal);

  update_global_location_list (UGLL_INSERT);
}

/* Insert single step breakpoints according to the current state.  */

int
insert_single_step_breakpoints (struct gdbarch *gdbarch)
{
  struct regcache *regcache = get_current_regcache ();
  std::vector<CORE_ADDR> next_pcs;

  next_pcs = gdbarch_software_single_step (gdbarch, regcache);

  if (!next_pcs.empty ())
    {
      struct frame_info *frame = get_current_frame ();
      const address_space *aspace = get_frame_address_space (frame);

      for (CORE_ADDR pc : next_pcs)
	insert_single_step_breakpoint (gdbarch, aspace, pc);

      return 1;
    }
  else
    return 0;
}

/* See breakpoint.h.  */

int
breakpoint_has_location_inserted_here (struct breakpoint *bp,
				       const address_space *aspace,
				       CORE_ADDR pc)
{
  struct bp_location *loc;

  for (loc = bp->loc; loc != NULL; loc = loc->next)
    if (loc->inserted
	&& breakpoint_location_address_match (loc, aspace, pc))
      return 1;

  return 0;
}

/* Check whether a software single-step breakpoint is inserted at
   PC.  */

int
single_step_breakpoint_inserted_here_p (const address_space *aspace,
					CORE_ADDR pc)
{
  struct breakpoint *bpt;

  ALL_BREAKPOINTS (bpt)
    {
      if (bpt->type == bp_single_step
	  && breakpoint_has_location_inserted_here (bpt, aspace, pc))
	return 1;
    }
  return 0;
}

/* Tracepoint-specific operations.  */

/* Set tracepoint count to NUM.  */
static void
set_tracepoint_count (int num)
{
  tracepoint_count = num;
  set_internalvar_integer (lookup_internalvar ("tpnum"), num);
}

static void
trace_command (const char *arg, int from_tty)
{
  struct breakpoint_ops *ops;

  event_location_up location = string_to_event_location (&arg,
							 current_language);
  if (location != NULL
      && event_location_type (location.get ()) == PROBE_LOCATION)
    ops = &tracepoint_probe_breakpoint_ops;
  else
    ops = &tracepoint_breakpoint_ops;

  create_breakpoint (get_current_arch (),
		     location.get (),
		     NULL, 0, arg, 1 /* parse arg */,
		     0 /* tempflag */,
		     bp_tracepoint /* type_wanted */,
		     0 /* Ignore count */,
		     pending_break_support,
		     ops,
		     from_tty,
		     1 /* enabled */,
		     0 /* internal */, 0);
}

static void
ftrace_command (const char *arg, int from_tty)
{
  event_location_up location = string_to_event_location (&arg,
							 current_language);
  create_breakpoint (get_current_arch (),
		     location.get (),
		     NULL, 0, arg, 1 /* parse arg */,
		     0 /* tempflag */,
		     bp_fast_tracepoint /* type_wanted */,
		     0 /* Ignore count */,
		     pending_break_support,
		     &tracepoint_breakpoint_ops,
		     from_tty,
		     1 /* enabled */,
		     0 /* internal */, 0);
}

/* strace command implementation.  Creates a static tracepoint.  */

static void
strace_command (const char *arg, int from_tty)
{
  struct breakpoint_ops *ops;
  event_location_up location;

  /* Decide if we are dealing with a static tracepoint marker (`-m'),
     or with a normal static tracepoint.  */
  if (arg && startswith (arg, "-m") && isspace (arg[2]))
    {
      ops = &strace_marker_breakpoint_ops;
      location = new_linespec_location (&arg, symbol_name_match_type::FULL);
    }
  else
    {
      ops = &tracepoint_breakpoint_ops;
      location = string_to_event_location (&arg, current_language);
    }

  create_breakpoint (get_current_arch (),
		     location.get (),
		     NULL, 0, arg, 1 /* parse arg */,
		     0 /* tempflag */,
		     bp_static_tracepoint /* type_wanted */,
		     0 /* Ignore count */,
		     pending_break_support,
		     ops,
		     from_tty,
		     1 /* enabled */,
		     0 /* internal */, 0);
}

/* Set up a fake reader function that gets command lines from a linked
   list that was acquired during tracepoint uploading.  */

static struct uploaded_tp *this_utp;
static int next_cmd;

static char *
read_uploaded_action (void)
{
  char *rslt = nullptr;

  if (next_cmd < this_utp->cmd_strings.size ())
    {
      rslt = this_utp->cmd_strings[next_cmd];
      next_cmd++;
    }

  return rslt;
}

/* Given information about a tracepoint as recorded on a target (which
   can be either a live system or a trace file), attempt to create an
   equivalent GDB tracepoint.  This is not a reliable process, since
   the target does not necessarily have all the information used when
   the tracepoint was originally defined.  */
  
struct tracepoint *
create_tracepoint_from_upload (struct uploaded_tp *utp)
{
  const char *addr_str;
  char small_buf[100];
  struct tracepoint *tp;

  if (utp->at_string)
    addr_str = utp->at_string;
  else
    {
      /* In the absence of a source location, fall back to raw
	 address.  Since there is no way to confirm that the address
	 means the same thing as when the trace was started, warn the
	 user.  */
      warning (_("Uploaded tracepoint %d has no "
		 "source location, using raw address"),
	       utp->number);
      xsnprintf (small_buf, sizeof (small_buf), "*%s", hex_string (utp->addr));
      addr_str = small_buf;
    }

  /* There's not much we can do with a sequence of bytecodes.  */
  if (utp->cond && !utp->cond_string)
    warning (_("Uploaded tracepoint %d condition "
	       "has no source form, ignoring it"),
	     utp->number);

  event_location_up location = string_to_event_location (&addr_str,
							 current_language);
  if (!create_breakpoint (get_current_arch (),
			  location.get (),
			  utp->cond_string, -1, addr_str,
			  0 /* parse cond/thread */,
			  0 /* tempflag */,
			  utp->type /* type_wanted */,
			  0 /* Ignore count */,
			  pending_break_support,
			  &tracepoint_breakpoint_ops,
			  0 /* from_tty */,
			  utp->enabled /* enabled */,
			  0 /* internal */,
			  CREATE_BREAKPOINT_FLAGS_INSERTED))
    return NULL;

  /* Get the tracepoint we just created.  */
  tp = get_tracepoint (tracepoint_count);
  gdb_assert (tp != NULL);

  if (utp->pass > 0)
    {
      xsnprintf (small_buf, sizeof (small_buf), "%d %d", utp->pass,
		 tp->number);

      trace_pass_command (small_buf, 0);
    }

  /* If we have uploaded versions of the original commands, set up a
     special-purpose "reader" function and call the usual command line
     reader, then pass the result to the breakpoint command-setting
     function.  */
  if (!utp->cmd_strings.empty ())
    {
      command_line_up cmd_list;

      this_utp = utp;
      next_cmd = 0;

      cmd_list = read_command_lines_1 (read_uploaded_action, 1, NULL, NULL);

      breakpoint_set_commands (tp, std::move (cmd_list));
    }
  else if (!utp->actions.empty ()
	   || !utp->step_actions.empty ())
    warning (_("Uploaded tracepoint %d actions "
	       "have no source form, ignoring them"),
	     utp->number);

  /* Copy any status information that might be available.  */
  tp->hit_count = utp->hit_count;
  tp->traceframe_usage = utp->traceframe_usage;

  return tp;
}
  
/* Print information on tracepoint number TPNUM_EXP, or all if
   omitted.  */

static void
info_tracepoints_command (const char *args, int from_tty)
{
  struct ui_out *uiout = current_uiout;
  int num_printed;

  num_printed = breakpoint_1 (args, 0, is_tracepoint);

  if (num_printed == 0)
    {
      if (args == NULL || *args == '\0')
	uiout->message ("No tracepoints.\n");
      else
	uiout->message ("No tracepoint matching '%s'.\n", args);
    }

  default_collect_info ();
}

/* The 'enable trace' command enables tracepoints.
   Not supported by all targets.  */
static void
enable_trace_command (const char *args, int from_tty)
{
  enable_command (args, from_tty);
}

/* The 'disable trace' command disables tracepoints.
   Not supported by all targets.  */
static void
disable_trace_command (const char *args, int from_tty)
{
  disable_command (args, from_tty);
}

/* Remove a tracepoint (or all if no argument).  */
static void
delete_trace_command (const char *arg, int from_tty)
{
  struct breakpoint *b, *b_tmp;

  dont_repeat ();

  if (arg == 0)
    {
      int breaks_to_delete = 0;

      /* Delete all breakpoints if no argument.
         Do not delete internal or call-dummy breakpoints, these
         have to be deleted with an explicit breakpoint number 
	 argument.  */
      ALL_TRACEPOINTS (b)
	if (is_tracepoint (b) && user_breakpoint_p (b))
	  {
	    breaks_to_delete = 1;
	    break;
	  }

      /* Ask user only if there are some breakpoints to delete.  */
      if (!from_tty
	  || (breaks_to_delete && query (_("Delete all tracepoints? "))))
	{
	  ALL_BREAKPOINTS_SAFE (b, b_tmp)
	    if (is_tracepoint (b) && user_breakpoint_p (b))
	      delete_breakpoint (b);
	}
    }
  else
    map_breakpoint_numbers
      (arg, [&] (breakpoint *b)
       {
	 iterate_over_related_breakpoints (b, delete_breakpoint);
       });
}

/* Helper function for trace_pass_command.  */

static void
trace_pass_set_count (struct tracepoint *tp, int count, int from_tty)
{
  tp->pass_count = count;
  gdb::observers::breakpoint_modified.notify (tp);
  if (from_tty)
    printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
		     tp->number, count);
}

/* Set passcount for tracepoint.

   First command argument is passcount, second is tracepoint number.
   If tracepoint number omitted, apply to most recently defined.
   Also accepts special argument "all".  */

static void
trace_pass_command (const char *args, int from_tty)
{
  struct tracepoint *t1;
  ULONGEST count;

  if (args == 0 || *args == 0)
    error (_("passcount command requires an "
	     "argument (count + optional TP num)"));

  count = strtoulst (args, &args, 10);	/* Count comes first, then TP num.  */

  args = skip_spaces (args);
  if (*args && strncasecmp (args, "all", 3) == 0)
    {
      struct breakpoint *b;

      args += 3;			/* Skip special argument "all".  */
      if (*args)
	error (_("Junk at end of arguments."));

      ALL_TRACEPOINTS (b)
      {
	t1 = (struct tracepoint *) b;
	trace_pass_set_count (t1, count, from_tty);
      }
    }
  else if (*args == '\0')
    {
      t1 = get_tracepoint_by_number (&args, NULL);
      if (t1)
	trace_pass_set_count (t1, count, from_tty);
    }
  else
    {
      number_or_range_parser parser (args);
      while (!parser.finished ())
	{
	  t1 = get_tracepoint_by_number (&args, &parser);
	  if (t1)
	    trace_pass_set_count (t1, count, from_tty);
	}
    }
}

struct tracepoint *
get_tracepoint (int num)
{
  struct breakpoint *t;

  ALL_TRACEPOINTS (t)
    if (t->number == num)
      return (struct tracepoint *) t;

  return NULL;
}

/* Find the tracepoint with the given target-side number (which may be
   different from the tracepoint number after disconnecting and
   reconnecting).  */

struct tracepoint *
get_tracepoint_by_number_on_target (int num)
{
  struct breakpoint *b;

  ALL_TRACEPOINTS (b)
    {
      struct tracepoint *t = (struct tracepoint *) b;

      if (t->number_on_target == num)
	return t;
    }

  return NULL;
}

/* Utility: parse a tracepoint number and look it up in the list.
   If STATE is not NULL, use, get_number_or_range_state and ignore ARG.
   If the argument is missing, the most recent tracepoint
   (tracepoint_count) is returned.  */

struct tracepoint *
get_tracepoint_by_number (const char **arg,
			  number_or_range_parser *parser)
{
  struct breakpoint *t;
  int tpnum;
  const char *instring = arg == NULL ? NULL : *arg;

  if (parser != NULL)
    {
      gdb_assert (!parser->finished ());
      tpnum = parser->get_number ();
    }
  else if (arg == NULL || *arg == NULL || ! **arg)
    tpnum = tracepoint_count;
  else
    tpnum = get_number (arg);

  if (tpnum <= 0)
    {
      if (instring && *instring)
	printf_filtered (_("bad tracepoint number at or near '%s'\n"), 
			 instring);
      else
	printf_filtered (_("No previous tracepoint\n"));
      return NULL;
    }

  ALL_TRACEPOINTS (t)
    if (t->number == tpnum)
    {
      return (struct tracepoint *) t;
    }

  printf_unfiltered ("No tracepoint number %d.\n", tpnum);
  return NULL;
}

void
print_recreate_thread (struct breakpoint *b, struct ui_file *fp)
{
  if (b->thread != -1)
    fprintf_unfiltered (fp, " thread %d", b->thread);

  if (b->task != 0)
    fprintf_unfiltered (fp, " task %d", b->task);

  fprintf_unfiltered (fp, "\n");
}

/* Save information on user settable breakpoints (watchpoints, etc) to
   a new script file named FILENAME.  If FILTER is non-NULL, call it
   on each breakpoint and only include the ones for which it returns
   non-zero.  */

static void
save_breakpoints (const char *filename, int from_tty,
		  int (*filter) (const struct breakpoint *))
{
  struct breakpoint *tp;
  int any = 0;