aboutsummaryrefslogtreecommitdiff
path: root/gdb/symtab.c
blob: f8c755fdab295a358f65f981e8cd45c9275a7644 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
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
/* Symbol table lookup for the GNU debugger, 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 "symtab.h"
#include "gdbtypes.h"
#include "gdbcore.h"
#include "frame.h"
#include "target.h"
#include "value.h"
#include "symfile.h"
#include "objfiles.h"
#include "gdbcmd.h"
#include "gdb_regex.h"
#include "expression.h"
#include "language.h"
#include "demangle.h"
#include "inferior.h"
#include "source.h"
#include "filenames.h"		/* for FILENAME_CMP */
#include "objc-lang.h"
#include "d-lang.h"
#include "ada-lang.h"
#include "go-lang.h"
#include "p-lang.h"
#include "addrmap.h"
#include "cli/cli-utils.h"
#include "fnmatch.h"
#include "hashtab.h"
#include "typeprint.h"

#include "gdb_obstack.h"
#include "block.h"
#include "dictionary.h"

#include <sys/types.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <ctype.h>
#include "cp-abi.h"
#include "cp-support.h"
#include "observable.h"
#include "solist.h"
#include "macrotab.h"
#include "macroscope.h"

#include "parser-defs.h"
#include "completer.h"
#include "progspace-and-thread.h"
#include "common/gdb_optional.h"
#include "filename-seen-cache.h"
#include "arch-utils.h"
#include <algorithm>
#include "common/pathstuff.h"

/* Forward declarations for local functions.  */

static void rbreak_command (const char *, int);

static int find_line_common (struct linetable *, int, int *, int);

static struct block_symbol
  lookup_symbol_aux (const char *name,
		     symbol_name_match_type match_type,
		     const struct block *block,
		     const domain_enum domain,
		     enum language language,
		     struct field_of_this_result *);

static
struct block_symbol lookup_local_symbol (const char *name,
					 symbol_name_match_type match_type,
					 const struct block *block,
					 const domain_enum domain,
					 enum language language);

static struct block_symbol
  lookup_symbol_in_objfile (struct objfile *objfile, int block_index,
			    const char *name, const domain_enum domain);

/* See symtab.h.  */
const struct block_symbol null_block_symbol = { NULL, NULL };

/* Program space key for finding name and language of "main".  */

static const struct program_space_data *main_progspace_key;

/* Type of the data stored on the program space.  */

struct main_info
{
  /* Name of "main".  */

  char *name_of_main;

  /* Language of "main".  */

  enum language language_of_main;
};

/* Program space key for finding its symbol cache.  */

static const struct program_space_data *symbol_cache_key;

/* The default symbol cache size.
   There is no extra cpu cost for large N (except when flushing the cache,
   which is rare).  The value here is just a first attempt.  A better default
   value may be higher or lower.  A prime number can make up for a bad hash
   computation, so that's why the number is what it is.  */
#define DEFAULT_SYMBOL_CACHE_SIZE 1021

/* The maximum symbol cache size.
   There's no method to the decision of what value to use here, other than
   there's no point in allowing a user typo to make gdb consume all memory.  */
#define MAX_SYMBOL_CACHE_SIZE (1024*1024)

/* symbol_cache_lookup returns this if a previous lookup failed to find the
   symbol in any objfile.  */
#define SYMBOL_LOOKUP_FAILED \
 ((struct block_symbol) {(struct symbol *) 1, NULL})
#define SYMBOL_LOOKUP_FAILED_P(SIB) (SIB.symbol == (struct symbol *) 1)

/* Recording lookups that don't find the symbol is just as important, if not
   more so, than recording found symbols.  */

enum symbol_cache_slot_state
{
  SYMBOL_SLOT_UNUSED,
  SYMBOL_SLOT_NOT_FOUND,
  SYMBOL_SLOT_FOUND
};

struct symbol_cache_slot
{
  enum symbol_cache_slot_state state;

  /* The objfile that was current when the symbol was looked up.
     This is only needed for global blocks, but for simplicity's sake
     we allocate the space for both.  If data shows the extra space used
     for static blocks is a problem, we can split things up then.

     Global blocks need cache lookup to include the objfile context because
     we need to account for gdbarch_iterate_over_objfiles_in_search_order
     which can traverse objfiles in, effectively, any order, depending on
     the current objfile, thus affecting which symbol is found.  Normally,
     only the current objfile is searched first, and then the rest are
     searched in recorded order; but putting cache lookup inside
     gdbarch_iterate_over_objfiles_in_search_order would be awkward.
     Instead we just make the current objfile part of the context of
     cache lookup.  This means we can record the same symbol multiple times,
     each with a different "current objfile" that was in effect when the
     lookup was saved in the cache, but cache space is pretty cheap.  */
  const struct objfile *objfile_context;

  union
  {
    struct block_symbol found;
    struct
    {
      char *name;
      domain_enum domain;
    } not_found;
  } value;
};

/* Symbols don't specify global vs static block.
   So keep them in separate caches.  */

struct block_symbol_cache
{
  unsigned int hits;
  unsigned int misses;
  unsigned int collisions;

  /* SYMBOLS is a variable length array of this size.
     One can imagine that in general one cache (global/static) should be a
     fraction of the size of the other, but there's no data at the moment
     on which to decide.  */
  unsigned int size;

  struct symbol_cache_slot symbols[1];
};

/* The symbol cache.

   Searching for symbols in the static and global blocks over multiple objfiles
   again and again can be slow, as can searching very big objfiles.  This is a
   simple cache to improve symbol lookup performance, which is critical to
   overall gdb performance.

   Symbols are hashed on the name, its domain, and block.
   They are also hashed on their objfile for objfile-specific lookups.  */

struct symbol_cache
{
  struct block_symbol_cache *global_symbols;
  struct block_symbol_cache *static_symbols;
};

/* When non-zero, print debugging messages related to symtab creation.  */
unsigned int symtab_create_debug = 0;

/* When non-zero, print debugging messages related to symbol lookup.  */
unsigned int symbol_lookup_debug = 0;

/* The size of the cache is staged here.  */
static unsigned int new_symbol_cache_size = DEFAULT_SYMBOL_CACHE_SIZE;

/* The current value of the symbol cache size.
   This is saved so that if the user enters a value too big we can restore
   the original value from here.  */
static unsigned int symbol_cache_size = DEFAULT_SYMBOL_CACHE_SIZE;

/* Non-zero if a file may be known by two different basenames.
   This is the uncommon case, and significantly slows down gdb.
   Default set to "off" to not slow down the common case.  */
int basenames_may_differ = 0;

/* Allow the user to configure the debugger behavior with respect
   to multiple-choice menus when more than one symbol matches during
   a symbol lookup.  */

const char multiple_symbols_ask[] = "ask";
const char multiple_symbols_all[] = "all";
const char multiple_symbols_cancel[] = "cancel";
static const char *const multiple_symbols_modes[] =
{
  multiple_symbols_ask,
  multiple_symbols_all,
  multiple_symbols_cancel,
  NULL
};
static const char *multiple_symbols_mode = multiple_symbols_all;

/* Read-only accessor to AUTO_SELECT_MODE.  */

const char *
multiple_symbols_select_mode (void)
{
  return multiple_symbols_mode;
}

/* Return the name of a domain_enum.  */

const char *
domain_name (domain_enum e)
{
  switch (e)
    {
    case UNDEF_DOMAIN: return "UNDEF_DOMAIN";
    case VAR_DOMAIN: return "VAR_DOMAIN";
    case STRUCT_DOMAIN: return "STRUCT_DOMAIN";
    case MODULE_DOMAIN: return "MODULE_DOMAIN";
    case LABEL_DOMAIN: return "LABEL_DOMAIN";
    case COMMON_BLOCK_DOMAIN: return "COMMON_BLOCK_DOMAIN";
    default: gdb_assert_not_reached ("bad domain_enum");
    }
}

/* Return the name of a search_domain .  */

const char *
search_domain_name (enum search_domain e)
{
  switch (e)
    {
    case VARIABLES_DOMAIN: return "VARIABLES_DOMAIN";
    case FUNCTIONS_DOMAIN: return "FUNCTIONS_DOMAIN";
    case TYPES_DOMAIN: return "TYPES_DOMAIN";
    case ALL_DOMAIN: return "ALL_DOMAIN";
    default: gdb_assert_not_reached ("bad search_domain");
    }
}

/* See symtab.h.  */

struct symtab *
compunit_primary_filetab (const struct compunit_symtab *cust)
{
  gdb_assert (COMPUNIT_FILETABS (cust) != NULL);

  /* The primary file symtab is the first one in the list.  */
  return COMPUNIT_FILETABS (cust);
}

/* See symtab.h.  */

enum language
compunit_language (const struct compunit_symtab *cust)
{
  struct symtab *symtab = compunit_primary_filetab (cust);

/* The language of the compunit symtab is the language of its primary
   source file.  */
  return SYMTAB_LANGUAGE (symtab);
}

/* See whether FILENAME matches SEARCH_NAME using the rule that we
   advertise to the user.  (The manual's description of linespecs
   describes what we advertise).  Returns true if they match, false
   otherwise.  */

int
compare_filenames_for_search (const char *filename, const char *search_name)
{
  int len = strlen (filename);
  size_t search_len = strlen (search_name);

  if (len < search_len)
    return 0;

  /* The tail of FILENAME must match.  */
  if (FILENAME_CMP (filename + len - search_len, search_name) != 0)
    return 0;

  /* Either the names must completely match, or the character
     preceding the trailing SEARCH_NAME segment of FILENAME must be a
     directory separator.

     The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
     cannot match FILENAME "/path//dir/file.c" - as user has requested
     absolute path.  The sama applies for "c:\file.c" possibly
     incorrectly hypothetically matching "d:\dir\c:\file.c".

     The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
     compatible with SEARCH_NAME "file.c".  In such case a compiler had
     to put the "c:file.c" name into debug info.  Such compatibility
     works only on GDB built for DOS host.  */
  return (len == search_len
	  || (!IS_ABSOLUTE_PATH (search_name)
	      && IS_DIR_SEPARATOR (filename[len - search_len - 1]))
	  || (HAS_DRIVE_SPEC (filename)
	      && STRIP_DRIVE_SPEC (filename) == &filename[len - search_len]));
}

/* Same as compare_filenames_for_search, but for glob-style patterns.
   Heads up on the order of the arguments.  They match the order of
   compare_filenames_for_search, but it's the opposite of the order of
   arguments to gdb_filename_fnmatch.  */

int
compare_glob_filenames_for_search (const char *filename,
				   const char *search_name)
{
  /* We rely on the property of glob-style patterns with FNM_FILE_NAME that
     all /s have to be explicitly specified.  */
  int file_path_elements = count_path_elements (filename);
  int search_path_elements = count_path_elements (search_name);

  if (search_path_elements > file_path_elements)
    return 0;

  if (IS_ABSOLUTE_PATH (search_name))
    {
      return (search_path_elements == file_path_elements
	      && gdb_filename_fnmatch (search_name, filename,
				       FNM_FILE_NAME | FNM_NOESCAPE) == 0);
    }

  {
    const char *file_to_compare
      = strip_leading_path_elements (filename,
				     file_path_elements - search_path_elements);

    return gdb_filename_fnmatch (search_name, file_to_compare,
				 FNM_FILE_NAME | FNM_NOESCAPE) == 0;
  }
}

/* Check for a symtab of a specific name by searching some symtabs.
   This is a helper function for callbacks of iterate_over_symtabs.

   If NAME is not absolute, then REAL_PATH is NULL
   If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.

   The return value, NAME, REAL_PATH and CALLBACK are identical to the
   `map_symtabs_matching_filename' method of quick_symbol_functions.

   FIRST and AFTER_LAST indicate the range of compunit symtabs to search.
   Each symtab within the specified compunit symtab is also searched.
   AFTER_LAST is one past the last compunit symtab to search; NULL means to
   search until the end of the list.  */

bool
iterate_over_some_symtabs (const char *name,
			   const char *real_path,
			   struct compunit_symtab *first,
			   struct compunit_symtab *after_last,
			   gdb::function_view<bool (symtab *)> callback)
{
  struct compunit_symtab *cust;
  struct symtab *s;
  const char* base_name = lbasename (name);

  for (cust = first; cust != NULL && cust != after_last; cust = cust->next)
    {
      ALL_COMPUNIT_FILETABS (cust, s)
	{
	  if (compare_filenames_for_search (s->filename, name))
	    {
	      if (callback (s))
		return true;
	      continue;
	    }

	  /* Before we invoke realpath, which can get expensive when many
	     files are involved, do a quick comparison of the basenames.  */
	  if (! basenames_may_differ
	      && FILENAME_CMP (base_name, lbasename (s->filename)) != 0)
	    continue;

	  if (compare_filenames_for_search (symtab_to_fullname (s), name))
	    {
	      if (callback (s))
		return true;
	      continue;
	    }

	  /* If the user gave us an absolute path, try to find the file in
	     this symtab and use its absolute path.  */
	  if (real_path != NULL)
	    {
	      const char *fullname = symtab_to_fullname (s);

	      gdb_assert (IS_ABSOLUTE_PATH (real_path));
	      gdb_assert (IS_ABSOLUTE_PATH (name));
	      if (FILENAME_CMP (real_path, fullname) == 0)
		{
		  if (callback (s))
		    return true;
		  continue;
		}
	    }
	}
    }

  return false;
}

/* Check for a symtab of a specific name; first in symtabs, then in
   psymtabs.  *If* there is no '/' in the name, a match after a '/'
   in the symtab filename will also work.

   Calls CALLBACK with each symtab that is found.  If CALLBACK returns
   true, the search stops.  */

void
iterate_over_symtabs (const char *name,
		      gdb::function_view<bool (symtab *)> callback)
{
  struct objfile *objfile;
  gdb::unique_xmalloc_ptr<char> real_path;

  /* Here we are interested in canonicalizing an absolute path, not
     absolutizing a relative path.  */
  if (IS_ABSOLUTE_PATH (name))
    {
      real_path = gdb_realpath (name);
      gdb_assert (IS_ABSOLUTE_PATH (real_path.get ()));
    }

  ALL_OBJFILES (objfile)
    {
      if (iterate_over_some_symtabs (name, real_path.get (),
				     objfile->compunit_symtabs, NULL,
				     callback))
	return;
    }

  /* Same search rules as above apply here, but now we look thru the
     psymtabs.  */

  ALL_OBJFILES (objfile)
    {
      if (objfile->sf
	  && objfile->sf->qf->map_symtabs_matching_filename (objfile,
							     name,
							     real_path.get (),
							     callback))
	return;
    }
}

/* A wrapper for iterate_over_symtabs that returns the first matching
   symtab, or NULL.  */

struct symtab *
lookup_symtab (const char *name)
{
  struct symtab *result = NULL;

  iterate_over_symtabs (name, [&] (symtab *symtab)
    {
      result = symtab;
      return true;
    });

  return result;
}


/* Mangle a GDB method stub type.  This actually reassembles the pieces of the
   full method name, which consist of the class name (from T), the unadorned
   method name from METHOD_ID, and the signature for the specific overload,
   specified by SIGNATURE_ID.  Note that this function is g++ specific.  */

char *
gdb_mangle_name (struct type *type, int method_id, int signature_id)
{
  int mangled_name_len;
  char *mangled_name;
  struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
  struct fn_field *method = &f[signature_id];
  const char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
  const char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
  const char *newname = TYPE_NAME (type);

  /* Does the form of physname indicate that it is the full mangled name
     of a constructor (not just the args)?  */
  int is_full_physname_constructor;

  int is_constructor;
  int is_destructor = is_destructor_name (physname);
  /* Need a new type prefix.  */
  const char *const_prefix = method->is_const ? "C" : "";
  const char *volatile_prefix = method->is_volatile ? "V" : "";
  char buf[20];
  int len = (newname == NULL ? 0 : strlen (newname));

  /* Nothing to do if physname already contains a fully mangled v3 abi name
     or an operator name.  */
  if ((physname[0] == '_' && physname[1] == 'Z')
      || is_operator_name (field_name))
    return xstrdup (physname);

  is_full_physname_constructor = is_constructor_name (physname);

  is_constructor = is_full_physname_constructor 
    || (newname && strcmp (field_name, newname) == 0);

  if (!is_destructor)
    is_destructor = (startswith (physname, "__dt"));

  if (is_destructor || is_full_physname_constructor)
    {
      mangled_name = (char *) xmalloc (strlen (physname) + 1);
      strcpy (mangled_name, physname);
      return mangled_name;
    }

  if (len == 0)
    {
      xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix);
    }
  else if (physname[0] == 't' || physname[0] == 'Q')
    {
      /* The physname for template and qualified methods already includes
         the class name.  */
      xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix);
      newname = NULL;
      len = 0;
    }
  else
    {
      xsnprintf (buf, sizeof (buf), "__%s%s%d", const_prefix,
		 volatile_prefix, len);
    }
  mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
		      + strlen (buf) + len + strlen (physname) + 1);

  mangled_name = (char *) xmalloc (mangled_name_len);
  if (is_constructor)
    mangled_name[0] = '\0';
  else
    strcpy (mangled_name, field_name);

  strcat (mangled_name, buf);
  /* If the class doesn't have a name, i.e. newname NULL, then we just
     mangle it using 0 for the length of the class.  Thus it gets mangled
     as something starting with `::' rather than `classname::'.  */
  if (newname != NULL)
    strcat (mangled_name, newname);

  strcat (mangled_name, physname);
  return (mangled_name);
}

/* Set the demangled name of GSYMBOL to NAME.  NAME must be already
   correctly allocated.  */

void
symbol_set_demangled_name (struct general_symbol_info *gsymbol,
                           const char *name,
                           struct obstack *obstack)
{
  if (gsymbol->language == language_ada)
    {
      if (name == NULL)
	{
	  gsymbol->ada_mangled = 0;
	  gsymbol->language_specific.obstack = obstack;
	}
      else
	{
	  gsymbol->ada_mangled = 1;
	  gsymbol->language_specific.demangled_name = name;
	}
    }
  else
    gsymbol->language_specific.demangled_name = name;
}

/* Return the demangled name of GSYMBOL.  */

const char *
symbol_get_demangled_name (const struct general_symbol_info *gsymbol)
{
  if (gsymbol->language == language_ada)
    {
      if (!gsymbol->ada_mangled)
	return NULL;
      /* Fall through.  */
    }

  return gsymbol->language_specific.demangled_name;
}


/* Initialize the language dependent portion of a symbol
   depending upon the language for the symbol.  */

void
symbol_set_language (struct general_symbol_info *gsymbol,
                     enum language language,
		     struct obstack *obstack)
{
  gsymbol->language = language;
  if (gsymbol->language == language_cplus
      || gsymbol->language == language_d
      || gsymbol->language == language_go
      || gsymbol->language == language_objc
      || gsymbol->language == language_fortran)
    {
      symbol_set_demangled_name (gsymbol, NULL, obstack);
    }
  else if (gsymbol->language == language_ada)
    {
      gdb_assert (gsymbol->ada_mangled == 0);
      gsymbol->language_specific.obstack = obstack;
    }
  else
    {
      memset (&gsymbol->language_specific, 0,
	      sizeof (gsymbol->language_specific));
    }
}

/* Functions to initialize a symbol's mangled name.  */

/* Objects of this type are stored in the demangled name hash table.  */
struct demangled_name_entry
{
  const char *mangled;
  char demangled[1];
};

/* Hash function for the demangled name hash.  */

static hashval_t
hash_demangled_name_entry (const void *data)
{
  const struct demangled_name_entry *e
    = (const struct demangled_name_entry *) data;

  return htab_hash_string (e->mangled);
}

/* Equality function for the demangled name hash.  */

static int
eq_demangled_name_entry (const void *a, const void *b)
{
  const struct demangled_name_entry *da
    = (const struct demangled_name_entry *) a;
  const struct demangled_name_entry *db
    = (const struct demangled_name_entry *) b;

  return strcmp (da->mangled, db->mangled) == 0;
}

/* Create the hash table used for demangled names.  Each hash entry is
   a pair of strings; one for the mangled name and one for the demangled
   name.  The entry is hashed via just the mangled name.  */

static void
create_demangled_names_hash (struct objfile *objfile)
{
  /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
     The hash table code will round this up to the next prime number.
     Choosing a much larger table size wastes memory, and saves only about
     1% in symbol reading.  */

  objfile->per_bfd->demangled_names_hash = htab_create_alloc
    (256, hash_demangled_name_entry, eq_demangled_name_entry,
     NULL, xcalloc, xfree);
}

/* Try to determine the demangled name for a symbol, based on the
   language of that symbol.  If the language is set to language_auto,
   it will attempt to find any demangling algorithm that works and
   then set the language appropriately.  The returned name is allocated
   by the demangler and should be xfree'd.  */

static char *
symbol_find_demangled_name (struct general_symbol_info *gsymbol,
			    const char *mangled)
{
  char *demangled = NULL;
  int i;

  if (gsymbol->language == language_unknown)
    gsymbol->language = language_auto;

  if (gsymbol->language != language_auto)
    {
      const struct language_defn *lang = language_def (gsymbol->language);

      language_sniff_from_mangled_name (lang, mangled, &demangled);
      return demangled;
    }

  for (i = language_unknown; i < nr_languages; ++i)
    {
      enum language l = (enum language) i;
      const struct language_defn *lang = language_def (l);

      if (language_sniff_from_mangled_name (lang, mangled, &demangled))
	{
	  gsymbol->language = l;
	  return demangled;
	}
    }

  return NULL;
}

/* Set both the mangled and demangled (if any) names for GSYMBOL based
   on LINKAGE_NAME and LEN.  Ordinarily, NAME is copied onto the
   objfile's obstack; but if COPY_NAME is 0 and if NAME is
   NUL-terminated, then this function assumes that NAME is already
   correctly saved (either permanently or with a lifetime tied to the
   objfile), and it will not be copied.

   The hash table corresponding to OBJFILE is used, and the memory
   comes from the per-BFD storage_obstack.  LINKAGE_NAME is copied,
   so the pointer can be discarded after calling this function.  */

void
symbol_set_names (struct general_symbol_info *gsymbol,
		  const char *linkage_name, int len, int copy_name,
		  struct objfile *objfile)
{
  struct demangled_name_entry **slot;
  /* A 0-terminated copy of the linkage name.  */
  const char *linkage_name_copy;
  struct demangled_name_entry entry;
  struct objfile_per_bfd_storage *per_bfd = objfile->per_bfd;

  if (gsymbol->language == language_ada)
    {
      /* In Ada, we do the symbol lookups using the mangled name, so
         we can save some space by not storing the demangled name.  */
      if (!copy_name)
	gsymbol->name = linkage_name;
      else
	{
	  char *name = (char *) obstack_alloc (&per_bfd->storage_obstack,
					       len + 1);

	  memcpy (name, linkage_name, len);
	  name[len] = '\0';
	  gsymbol->name = name;
	}
      symbol_set_demangled_name (gsymbol, NULL, &per_bfd->storage_obstack);

      return;
    }

  if (per_bfd->demangled_names_hash == NULL)
    create_demangled_names_hash (objfile);

  if (linkage_name[len] != '\0')
    {
      char *alloc_name;

      alloc_name = (char *) alloca (len + 1);
      memcpy (alloc_name, linkage_name, len);
      alloc_name[len] = '\0';

      linkage_name_copy = alloc_name;
    }
  else
    linkage_name_copy = linkage_name;

  /* Set the symbol language.  */
  char *demangled_name_ptr
    = symbol_find_demangled_name (gsymbol, linkage_name_copy);
  gdb::unique_xmalloc_ptr<char> demangled_name (demangled_name_ptr);

  entry.mangled = linkage_name_copy;
  slot = ((struct demangled_name_entry **)
	  htab_find_slot (per_bfd->demangled_names_hash,
			  &entry, INSERT));

  /* If this name is not in the hash table, add it.  */
  if (*slot == NULL
      /* A C version of the symbol may have already snuck into the table.
	 This happens to, e.g., main.init (__go_init_main).  Cope.  */
      || (gsymbol->language == language_go
	  && (*slot)->demangled[0] == '\0'))
    {
      int demangled_len = demangled_name ? strlen (demangled_name.get ()) : 0;

      /* Suppose we have demangled_name==NULL, copy_name==0, and
	 linkage_name_copy==linkage_name.  In this case, we already have the
	 mangled name saved, and we don't have a demangled name.  So,
	 you might think we could save a little space by not recording
	 this in the hash table at all.
	 
	 It turns out that it is actually important to still save such
	 an entry in the hash table, because storing this name gives
	 us better bcache hit rates for partial symbols.  */
      if (!copy_name && linkage_name_copy == linkage_name)
	{
	  *slot
	    = ((struct demangled_name_entry *)
	       obstack_alloc (&per_bfd->storage_obstack,
			      offsetof (struct demangled_name_entry, demangled)
			      + demangled_len + 1));
	  (*slot)->mangled = linkage_name;
	}
      else
	{
	  char *mangled_ptr;

	  /* If we must copy the mangled name, put it directly after
	     the demangled name so we can have a single
	     allocation.  */
	  *slot
	    = ((struct demangled_name_entry *)
	       obstack_alloc (&per_bfd->storage_obstack,
			      offsetof (struct demangled_name_entry, demangled)
			      + len + demangled_len + 2));
	  mangled_ptr = &((*slot)->demangled[demangled_len + 1]);
	  strcpy (mangled_ptr, linkage_name_copy);
	  (*slot)->mangled = mangled_ptr;
	}

      if (demangled_name != NULL)
	strcpy ((*slot)->demangled, demangled_name.get());
      else
	(*slot)->demangled[0] = '\0';
    }

  gsymbol->name = (*slot)->mangled;
  if ((*slot)->demangled[0] != '\0')
    symbol_set_demangled_name (gsymbol, (*slot)->demangled,
			       &per_bfd->storage_obstack);
  else
    symbol_set_demangled_name (gsymbol, NULL, &per_bfd->storage_obstack);
}

/* Return the source code name of a symbol.  In languages where
   demangling is necessary, this is the demangled name.  */

const char *
symbol_natural_name (const struct general_symbol_info *gsymbol)
{
  switch (gsymbol->language)
    {
    case language_cplus:
    case language_d:
    case language_go:
    case language_objc:
    case language_fortran:
      if (symbol_get_demangled_name (gsymbol) != NULL)
	return symbol_get_demangled_name (gsymbol);
      break;
    case language_ada:
      return ada_decode_symbol (gsymbol);
    default:
      break;
    }
  return gsymbol->name;
}

/* Return the demangled name for a symbol based on the language for
   that symbol.  If no demangled name exists, return NULL.  */

const char *
symbol_demangled_name (const struct general_symbol_info *gsymbol)
{
  const char *dem_name = NULL;

  switch (gsymbol->language)
    {
    case language_cplus:
    case language_d:
    case language_go:
    case language_objc:
    case language_fortran:
      dem_name = symbol_get_demangled_name (gsymbol);
      break;
    case language_ada:
      dem_name = ada_decode_symbol (gsymbol);
      break;
    default:
      break;
    }
  return dem_name;
}

/* Return the search name of a symbol---generally the demangled or
   linkage name of the symbol, depending on how it will be searched for.
   If there is no distinct demangled name, then returns the same value
   (same pointer) as SYMBOL_LINKAGE_NAME.  */

const char *
symbol_search_name (const struct general_symbol_info *gsymbol)
{
  if (gsymbol->language == language_ada)
    return gsymbol->name;
  else
    return symbol_natural_name (gsymbol);
}

/* See symtab.h.  */

bool
symbol_matches_search_name (const struct general_symbol_info *gsymbol,
			    const lookup_name_info &name)
{
  symbol_name_matcher_ftype *name_match
    = get_symbol_name_matcher (language_def (gsymbol->language), name);
  return name_match (symbol_search_name (gsymbol), name, NULL);
}



/* Return 1 if the two sections are the same, or if they could
   plausibly be copies of each other, one in an original object
   file and another in a separated debug file.  */

int
matching_obj_sections (struct obj_section *obj_first,
		       struct obj_section *obj_second)
{
  asection *first = obj_first? obj_first->the_bfd_section : NULL;
  asection *second = obj_second? obj_second->the_bfd_section : NULL;
  struct objfile *obj;

  /* If they're the same section, then they match.  */
  if (first == second)
    return 1;

  /* If either is NULL, give up.  */
  if (first == NULL || second == NULL)
    return 0;

  /* This doesn't apply to absolute symbols.  */
  if (first->owner == NULL || second->owner == NULL)
    return 0;

  /* If they're in the same object file, they must be different sections.  */
  if (first->owner == second->owner)
    return 0;

  /* Check whether the two sections are potentially corresponding.  They must
     have the same size, address, and name.  We can't compare section indexes,
     which would be more reliable, because some sections may have been
     stripped.  */
  if (bfd_get_section_size (first) != bfd_get_section_size (second))
    return 0;

  /* In-memory addresses may start at a different offset, relativize them.  */
  if (bfd_get_section_vma (first->owner, first)
      - bfd_get_start_address (first->owner)
      != bfd_get_section_vma (second->owner, second)
	 - bfd_get_start_address (second->owner))
    return 0;

  if (bfd_get_section_name (first->owner, first) == NULL
      || bfd_get_section_name (second->owner, second) == NULL
      || strcmp (bfd_get_section_name (first->owner, first),
		 bfd_get_section_name (second->owner, second)) != 0)
    return 0;

  /* Otherwise check that they are in corresponding objfiles.  */

  ALL_OBJFILES (obj)
    if (obj->obfd == first->owner)
      break;
  gdb_assert (obj != NULL);

  if (obj->separate_debug_objfile != NULL
      && obj->separate_debug_objfile->obfd == second->owner)
    return 1;
  if (obj->separate_debug_objfile_backlink != NULL
      && obj->separate_debug_objfile_backlink->obfd == second->owner)
    return 1;

  return 0;
}

/* See symtab.h.  */

void
expand_symtab_containing_pc (CORE_ADDR pc, struct obj_section *section)
{
  struct objfile *objfile;
  struct bound_minimal_symbol msymbol;

  /* If we know that this is not a text address, return failure.  This is
     necessary because we loop based on texthigh and textlow, which do
     not include the data ranges.  */
  msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
  if (msymbol.minsym
      && (MSYMBOL_TYPE (msymbol.minsym) == mst_data
	  || MSYMBOL_TYPE (msymbol.minsym) == mst_bss
	  || MSYMBOL_TYPE (msymbol.minsym) == mst_abs
	  || MSYMBOL_TYPE (msymbol.minsym) == mst_file_data
	  || MSYMBOL_TYPE (msymbol.minsym) == mst_file_bss))
    return;

  ALL_OBJFILES (objfile)
  {
    struct compunit_symtab *cust = NULL;

    if (objfile->sf)
      cust = objfile->sf->qf->find_pc_sect_compunit_symtab (objfile, msymbol,
							    pc, section, 0);
    if (cust)
      return;
  }
}

/* Hash function for the symbol cache.  */

static unsigned int
hash_symbol_entry (const struct objfile *objfile_context,
		   const char *name, domain_enum domain)
{
  unsigned int hash = (uintptr_t) objfile_context;

  if (name != NULL)
    hash += htab_hash_string (name);

  /* Because of symbol_matches_domain we need VAR_DOMAIN and STRUCT_DOMAIN
     to map to the same slot.  */
  if (domain == STRUCT_DOMAIN)
    hash += VAR_DOMAIN * 7;
  else
    hash += domain * 7;

  return hash;
}

/* Equality function for the symbol cache.  */

static int
eq_symbol_entry (const struct symbol_cache_slot *slot,
		 const struct objfile *objfile_context,
		 const char *name, domain_enum domain)
{
  const char *slot_name;
  domain_enum slot_domain;

  if (slot->state == SYMBOL_SLOT_UNUSED)
    return 0;

  if (slot->objfile_context != objfile_context)
    return 0;

  if (slot->state == SYMBOL_SLOT_NOT_FOUND)
    {
      slot_name = slot->value.not_found.name;
      slot_domain = slot->value.not_found.domain;
    }
  else
    {
      slot_name = SYMBOL_SEARCH_NAME (slot->value.found.symbol);
      slot_domain = SYMBOL_DOMAIN (slot->value.found.symbol);
    }

  /* NULL names match.  */
  if (slot_name == NULL && name == NULL)
    {
      /* But there's no point in calling symbol_matches_domain in the
	 SYMBOL_SLOT_FOUND case.  */
      if (slot_domain != domain)
	return 0;
    }
  else if (slot_name != NULL && name != NULL)
    {
      /* It's important that we use the same comparison that was done
	 the first time through.  If the slot records a found symbol,
	 then this means using the symbol name comparison function of
	 the symbol's language with SYMBOL_SEARCH_NAME.  See
	 dictionary.c.  It also means using symbol_matches_domain for
	 found symbols.  See block.c.

	 If the slot records a not-found symbol, then require a precise match.
	 We could still be lax with whitespace like strcmp_iw though.  */

      if (slot->state == SYMBOL_SLOT_NOT_FOUND)
	{
	  if (strcmp (slot_name, name) != 0)
	    return 0;
	  if (slot_domain != domain)
	    return 0;
	}
      else
	{
	  struct symbol *sym = slot->value.found.symbol;
	  lookup_name_info lookup_name (name, symbol_name_match_type::FULL);

	  if (!SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name))
	    return 0;

	  if (!symbol_matches_domain (SYMBOL_LANGUAGE (sym),
				      slot_domain, domain))
	    return 0;
	}
    }
  else
    {
      /* Only one name is NULL.  */
      return 0;
    }

  return 1;
}

/* Given a cache of size SIZE, return the size of the struct (with variable
   length array) in bytes.  */

static size_t
symbol_cache_byte_size (unsigned int size)
{
  return (sizeof (struct block_symbol_cache)
	  + ((size - 1) * sizeof (struct symbol_cache_slot)));
}

/* Resize CACHE.  */

static void
resize_symbol_cache (struct symbol_cache *cache, unsigned int new_size)
{
  /* If there's no change in size, don't do anything.
     All caches have the same size, so we can just compare with the size
     of the global symbols cache.  */
  if ((cache->global_symbols != NULL
       && cache->global_symbols->size == new_size)
      || (cache->global_symbols == NULL
	  && new_size == 0))
    return;

  xfree (cache->global_symbols);
  xfree (cache->static_symbols);

  if (new_size == 0)
    {
      cache->global_symbols = NULL;
      cache->static_symbols = NULL;
    }
  else
    {
      size_t total_size = symbol_cache_byte_size (new_size);

      cache->global_symbols
	= (struct block_symbol_cache *) xcalloc (1, total_size);
      cache->static_symbols
	= (struct block_symbol_cache *) xcalloc (1, total_size);
      cache->global_symbols->size = new_size;
      cache->static_symbols->size = new_size;
    }
}

/* Make a symbol cache of size SIZE.  */

static struct symbol_cache *
make_symbol_cache (unsigned int size)
{
  struct symbol_cache *cache;

  cache = XCNEW (struct symbol_cache);
  resize_symbol_cache (cache, symbol_cache_size);
  return cache;
}

/* Free the space used by CACHE.  */

static void
free_symbol_cache (struct symbol_cache *cache)
{
  xfree (cache->global_symbols);
  xfree (cache->static_symbols);
  xfree (cache);
}

/* Return the symbol cache of PSPACE.
   Create one if it doesn't exist yet.  */

static struct symbol_cache *
get_symbol_cache (struct program_space *pspace)
{
  struct symbol_cache *cache
    = (struct symbol_cache *) program_space_data (pspace, symbol_cache_key);

  if (cache == NULL)
    {
      cache = make_symbol_cache (symbol_cache_size);
      set_program_space_data (pspace, symbol_cache_key, cache);
    }

  return cache;
}

/* Delete the symbol cache of PSPACE.
   Called when PSPACE is destroyed.  */

static void
symbol_cache_cleanup (struct program_space *pspace, void *data)
{
  struct symbol_cache *cache = (struct symbol_cache *) data;

  free_symbol_cache (cache);
}

/* Set the size of the symbol cache in all program spaces.  */

static void
set_symbol_cache_size (unsigned int new_size)
{
  struct program_space *pspace;

  ALL_PSPACES (pspace)
    {
      struct symbol_cache *cache
	= (struct symbol_cache *) program_space_data (pspace, symbol_cache_key);

      /* The pspace could have been created but not have a cache yet.  */
      if (cache != NULL)
	resize_symbol_cache (cache, new_size);
    }
}

/* Called when symbol-cache-size is set.  */

static void
set_symbol_cache_size_handler (const char *args, int from_tty,
			       struct cmd_list_element *c)
{
  if (new_symbol_cache_size > MAX_SYMBOL_CACHE_SIZE)
    {
      /* Restore the previous value.
	 This is the value the "show" command prints.  */
      new_symbol_cache_size = symbol_cache_size;

      error (_("Symbol cache size is too large, max is %u."),
	     MAX_SYMBOL_CACHE_SIZE);
    }
  symbol_cache_size = new_symbol_cache_size;

  set_symbol_cache_size (symbol_cache_size);
}

/* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE.
   OBJFILE_CONTEXT is the current objfile, which may be NULL.
   The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup
   failed (and thus this one will too), or NULL if the symbol is not present
   in the cache.
   If the symbol is not present in the cache, then *BSC_PTR and *SLOT_PTR are
   set to the cache and slot of the symbol to save the result of a full lookup
   attempt.  */

static struct block_symbol
symbol_cache_lookup (struct symbol_cache *cache,
		     struct objfile *objfile_context, int block,
		     const char *name, domain_enum domain,
		     struct block_symbol_cache **bsc_ptr,
		     struct symbol_cache_slot **slot_ptr)
{
  struct block_symbol_cache *bsc;
  unsigned int hash;
  struct symbol_cache_slot *slot;

  if (block == GLOBAL_BLOCK)
    bsc = cache->global_symbols;
  else
    bsc = cache->static_symbols;
  if (bsc == NULL)
    {
      *bsc_ptr = NULL;
      *slot_ptr = NULL;
      return (struct block_symbol) {NULL, NULL};
    }

  hash = hash_symbol_entry (objfile_context, name, domain);
  slot = bsc->symbols + hash % bsc->size;

  if (eq_symbol_entry (slot, objfile_context, name, domain))
    {
      if (symbol_lookup_debug)
	fprintf_unfiltered (gdb_stdlog,
			    "%s block symbol cache hit%s for %s, %s\n",
			    block == GLOBAL_BLOCK ? "Global" : "Static",
			    slot->state == SYMBOL_SLOT_NOT_FOUND
			    ? " (not found)" : "",
			    name, domain_name (domain));
      ++bsc->hits;
      if (slot->state == SYMBOL_SLOT_NOT_FOUND)
	return SYMBOL_LOOKUP_FAILED;
      return slot->value.found;
    }

  /* Symbol is not present in the cache.  */

  *bsc_ptr = bsc;
  *slot_ptr = slot;

  if (symbol_lookup_debug)
    {
      fprintf_unfiltered (gdb_stdlog,
			  "%s block symbol cache miss for %s, %s\n",
			  block == GLOBAL_BLOCK ? "Global" : "Static",
			  name, domain_name (domain));
    }
  ++bsc->misses;
  return (struct block_symbol) {NULL, NULL};
}

/* Clear out SLOT.  */

static void
symbol_cache_clear_slot (struct symbol_cache_slot *slot)
{
  if (slot->state == SYMBOL_SLOT_NOT_FOUND)
    xfree (slot->value.not_found.name);
  slot->state = SYMBOL_SLOT_UNUSED;
}

/* Mark SYMBOL as found in SLOT.
   OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
   if it's not needed to distinguish lookups (STATIC_BLOCK).  It is *not*
   necessarily the objfile the symbol was found in.  */

static void
symbol_cache_mark_found (struct block_symbol_cache *bsc,
			 struct symbol_cache_slot *slot,
			 struct objfile *objfile_context,
			 struct symbol *symbol,
			 const struct block *block)
{
  if (bsc == NULL)
    return;
  if (slot->state != SYMBOL_SLOT_UNUSED)
    {
      ++bsc->collisions;
      symbol_cache_clear_slot (slot);
    }
  slot->state = SYMBOL_SLOT_FOUND;
  slot->objfile_context = objfile_context;
  slot->value.found.symbol = symbol;
  slot->value.found.block = block;
}

/* Mark symbol NAME, DOMAIN as not found in SLOT.
   OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
   if it's not needed to distinguish lookups (STATIC_BLOCK).  */

static void
symbol_cache_mark_not_found (struct block_symbol_cache *bsc,
			     struct symbol_cache_slot *slot,
			     struct objfile *objfile_context,
			     const char *name, domain_enum domain)
{
  if (bsc == NULL)
    return;
  if (slot->state != SYMBOL_SLOT_UNUSED)
    {
      ++bsc->collisions;
      symbol_cache_clear_slot (slot);
    }
  slot->state = SYMBOL_SLOT_NOT_FOUND;
  slot->objfile_context = objfile_context;
  slot->value.not_found.name = xstrdup (name);
  slot->value.not_found.domain = domain;
}

/* Flush the symbol cache of PSPACE.  */

static void
symbol_cache_flush (struct program_space *pspace)
{
  struct symbol_cache *cache
    = (struct symbol_cache *) program_space_data (pspace, symbol_cache_key);
  int pass;

  if (cache == NULL)
    return;
  if (cache->global_symbols == NULL)
    {
      gdb_assert (symbol_cache_size == 0);
      gdb_assert (cache->static_symbols == NULL);
      return;
    }

  /* If the cache is untouched since the last flush, early exit.
     This is important for performance during the startup of a program linked
     with 100s (or 1000s) of shared libraries.  */
  if (cache->global_symbols->misses == 0
      && cache->static_symbols->misses == 0)
    return;

  gdb_assert (cache->global_symbols->size == symbol_cache_size);
  gdb_assert (cache->static_symbols->size == symbol_cache_size);

  for (pass = 0; pass < 2; ++pass)
    {
      struct block_symbol_cache *bsc
	= pass == 0 ? cache->global_symbols : cache->static_symbols;
      unsigned int i;

      for (i = 0; i < bsc->size; ++i)
	symbol_cache_clear_slot (&bsc->symbols[i]);
    }

  cache->global_symbols->hits = 0;
  cache->global_symbols->misses = 0;
  cache->global_symbols->collisions = 0;
  cache->static_symbols->hits = 0;
  cache->static_symbols->misses = 0;
  cache->static_symbols->collisions = 0;
}

/* Dump CACHE.  */

static void
symbol_cache_dump (const struct symbol_cache *cache)
{
  int pass;

  if (cache->global_symbols == NULL)
    {
      printf_filtered ("  <disabled>\n");
      return;
    }

  for (pass = 0; pass < 2; ++pass)
    {
      const struct block_symbol_cache *bsc
	= pass == 0 ? cache->global_symbols : cache->static_symbols;
      unsigned int i;

      if (pass == 0)
	printf_filtered ("Global symbols:\n");
      else
	printf_filtered ("Static symbols:\n");

      for (i = 0; i < bsc->size; ++i)
	{
	  const struct symbol_cache_slot *slot = &bsc->symbols[i];

	  QUIT;

	  switch (slot->state)
	    {
	    case SYMBOL_SLOT_UNUSED:
	      break;
	    case SYMBOL_SLOT_NOT_FOUND:
	      printf_filtered ("  [%4u] = %s, %s %s (not found)\n", i,
			       host_address_to_string (slot->objfile_context),
			       slot->value.not_found.name,
			       domain_name (slot->value.not_found.domain));
	      break;
	    case SYMBOL_SLOT_FOUND:
	      {
		struct symbol *found = slot->value.found.symbol;
		const struct objfile *context = slot->objfile_context;

		printf_filtered ("  [%4u] = %s, %s %s\n", i,
				 host_address_to_string (context),
				 SYMBOL_PRINT_NAME (found),
				 domain_name (SYMBOL_DOMAIN (found)));
		break;
	      }
	    }
	}
    }
}

/* The "mt print symbol-cache" command.  */

static void
maintenance_print_symbol_cache (const char *args, int from_tty)
{
  struct program_space *pspace;

  ALL_PSPACES (pspace)
    {
      struct symbol_cache *cache;

      printf_filtered (_("Symbol cache for pspace %d\n%s:\n"),
		       pspace->num,
		       pspace->symfile_object_file != NULL
		       ? objfile_name (pspace->symfile_object_file)
		       : "(no object file)");

      /* If the cache hasn't been created yet, avoid creating one.  */
      cache
	= (struct symbol_cache *) program_space_data (pspace, symbol_cache_key);
      if (cache == NULL)
	printf_filtered ("  <empty>\n");
      else
	symbol_cache_dump (cache);
    }
}

/* The "mt flush-symbol-cache" command.  */

static void
maintenance_flush_symbol_cache (const char *args, int from_tty)
{
  struct program_space *pspace;

  ALL_PSPACES (pspace)
    {
      symbol_cache_flush (pspace);
    }
}

/* Print usage statistics of CACHE.  */

static void
symbol_cache_stats (struct symbol_cache *cache)
{
  int pass;

  if (cache->global_symbols == NULL)
    {
      printf_filtered ("  <disabled>\n");
      return;
    }

  for (pass = 0; pass < 2; ++pass)
    {
      const struct block_symbol_cache *bsc
	= pass == 0 ? cache->global_symbols : cache->static_symbols;

      QUIT;

      if (pass == 0)
	printf_filtered ("Global block cache stats:\n");
      else
	printf_filtered ("Static block cache stats:\n");

      printf_filtered ("  size:       %u\n", bsc->size);
      printf_filtered ("  hits:       %u\n", bsc->hits);
      printf_filtered ("  misses:     %u\n", bsc->misses);
      printf_filtered ("  collisions: %u\n", bsc->collisions);
    }
}

/* The "mt print symbol-cache-statistics" command.  */

static void
maintenance_print_symbol_cache_statistics (const char *args, int from_tty)
{
  struct program_space *pspace;

  ALL_PSPACES (pspace)
    {
      struct symbol_cache *cache;

      printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"),
		       pspace->num,
		       pspace->symfile_object_file != NULL
		       ? objfile_name (pspace->symfile_object_file)
		       : "(no object file)");

      /* If the cache hasn't been created yet, avoid creating one.  */
      cache
	= (struct symbol_cache *) program_space_data (pspace, symbol_cache_key);
      if (cache == NULL)
 	printf_filtered ("  empty, no stats available\n");
      else
	symbol_cache_stats (cache);
    }
}

/* This module's 'new_objfile' observer.  */

static void
symtab_new_objfile_observer (struct objfile *objfile)
{
  /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL.  */
  symbol_cache_flush (current_program_space);
}

/* This module's 'free_objfile' observer.  */

static void
symtab_free_objfile_observer (struct objfile *objfile)
{
  symbol_cache_flush (objfile->pspace);
}

/* Debug symbols usually don't have section information.  We need to dig that
   out of the minimal symbols and stash that in the debug symbol.  */

void
fixup_section (struct general_symbol_info *ginfo,
	       CORE_ADDR addr, struct objfile *objfile)
{
  struct minimal_symbol *msym;

  /* First, check whether a minimal symbol with the same name exists
     and points to the same address.  The address check is required
     e.g. on PowerPC64, where the minimal symbol for a function will
     point to the function descriptor, while the debug symbol will
     point to the actual function code.  */
  msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile);
  if (msym)
    ginfo->section = MSYMBOL_SECTION (msym);
  else
    {
      /* Static, function-local variables do appear in the linker
	 (minimal) symbols, but are frequently given names that won't
	 be found via lookup_minimal_symbol().  E.g., it has been
	 observed in frv-uclinux (ELF) executables that a static,
	 function-local variable named "foo" might appear in the
	 linker symbols as "foo.6" or "foo.3".  Thus, there is no
	 point in attempting to extend the lookup-by-name mechanism to
	 handle this case due to the fact that there can be multiple
	 names.

	 So, instead, search the section table when lookup by name has
	 failed.  The ``addr'' and ``endaddr'' fields may have already
	 been relocated.  If so, the relocation offset (i.e. the
	 ANOFFSET value) needs to be subtracted from these values when
	 performing the comparison.  We unconditionally subtract it,
	 because, when no relocation has been performed, the ANOFFSET
	 value will simply be zero.

	 The address of the symbol whose section we're fixing up HAS
	 NOT BEEN adjusted (relocated) yet.  It can't have been since
	 the section isn't yet known and knowing the section is
	 necessary in order to add the correct relocation value.  In
	 other words, we wouldn't even be in this function (attempting
	 to compute the section) if it were already known.

	 Note that it is possible to search the minimal symbols
	 (subtracting the relocation value if necessary) to find the
	 matching minimal symbol, but this is overkill and much less
	 efficient.  It is not necessary to find the matching minimal
	 symbol, only its section.

	 Note that this technique (of doing a section table search)
	 can fail when unrelocated section addresses overlap.  For
	 this reason, we still attempt a lookup by name prior to doing
	 a search of the section table.  */

      struct obj_section *s;
      int fallback = -1;

      ALL_OBJFILE_OSECTIONS (objfile, s)
	{
	  int idx = s - objfile->sections;
	  CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);

	  if (fallback == -1)
	    fallback = idx;

	  if (obj_section_addr (s) - offset <= addr
	      && addr < obj_section_endaddr (s) - offset)
	    {
	      ginfo->section = idx;
	      return;
	    }
	}

      /* If we didn't find the section, assume it is in the first
	 section.  If there is no allocated section, then it hardly
	 matters what we pick, so just pick zero.  */
      if (fallback == -1)
	ginfo->section = 0;
      else
	ginfo->section = fallback;
    }
}

struct symbol *
fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
{
  CORE_ADDR addr;

  if (!sym)
    return NULL;

  if (!SYMBOL_OBJFILE_OWNED (sym))
    return sym;

  /* We either have an OBJFILE, or we can get at it from the sym's
     symtab.  Anything else is a bug.  */
  gdb_assert (objfile || symbol_symtab (sym));

  if (objfile == NULL)
    objfile = symbol_objfile (sym);

  if (SYMBOL_OBJ_SECTION (objfile, sym))
    return sym;

  /* We should have an objfile by now.  */
  gdb_assert (objfile);

  switch (SYMBOL_CLASS (sym))
    {
    case LOC_STATIC:
    case LOC_LABEL:
      addr = SYMBOL_VALUE_ADDRESS (sym);
      break;
    case LOC_BLOCK:
      addr = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym));
      break;

    default:
      /* Nothing else will be listed in the minsyms -- no use looking
	 it up.  */
      return sym;
    }

  fixup_section (&sym->ginfo, addr, objfile);

  return sym;
}

/* See symtab.h.  */

demangle_for_lookup_info::demangle_for_lookup_info
  (const lookup_name_info &lookup_name, language lang)
{
  demangle_result_storage storage;

  if (lookup_name.ignore_parameters () && lang == language_cplus)
    {
      gdb::unique_xmalloc_ptr<char> without_params
	= cp_remove_params_if_any (lookup_name.name ().c_str (),
				   lookup_name.completion_mode ());

      if (without_params != NULL)
	{
	  if (lookup_name.match_type () != symbol_name_match_type::SEARCH_NAME)
	    m_demangled_name = demangle_for_lookup (without_params.get (),
						    lang, storage);
	  return;
	}
    }

  if (lookup_name.match_type () == symbol_name_match_type::SEARCH_NAME)
    m_demangled_name = lookup_name.name ();
  else
    m_demangled_name = demangle_for_lookup (lookup_name.name ().c_str (),
					    lang, storage);
}

/* See symtab.h.  */

const lookup_name_info &
lookup_name_info::match_any ()
{
  /* Lookup any symbol that "" would complete.  I.e., this matches all
     symbol names.  */
  static const lookup_name_info lookup_name ({}, symbol_name_match_type::FULL,
					     true);

  return lookup_name;
}

/* Compute the demangled form of NAME as used by the various symbol
   lookup functions.  The result can either be the input NAME
   directly, or a pointer to a buffer owned by the STORAGE object.

   For Ada, this function just returns NAME, unmodified.
   Normally, Ada symbol lookups are performed using the encoded name
   rather than the demangled name, and so it might seem to make sense
   for this function to return an encoded version of NAME.
   Unfortunately, we cannot do this, because this function is used in
   circumstances where it is not appropriate to try to encode NAME.
   For instance, when displaying the frame info, we demangle the name
   of each parameter, and then perform a symbol lookup inside our
   function using that demangled name.  In Ada, certain functions
   have internally-generated parameters whose name contain uppercase
   characters.  Encoding those name would result in those uppercase
   characters to become lowercase, and thus cause the symbol lookup
   to fail.  */

const char *
demangle_for_lookup (const char *name, enum language lang,
		     demangle_result_storage &storage)
{
  /* If we are using C++, D, or Go, demangle the name before doing a
     lookup, so we can always binary search.  */
  if (lang == language_cplus)
    {
      char *demangled_name = gdb_demangle (name, DMGL_ANSI | DMGL_PARAMS);
      if (demangled_name != NULL)
	return storage.set_malloc_ptr (demangled_name);

      /* If we were given a non-mangled name, canonicalize it
	 according to the language (so far only for C++).  */
      std::string canon = cp_canonicalize_string (name);
      if (!canon.empty ())
	return storage.swap_string (canon);
    }
  else if (lang == language_d)
    {
      char *demangled_name = d_demangle (name, 0);
      if (demangled_name != NULL)
	return storage.set_malloc_ptr (demangled_name);
    }
  else if (lang == language_go)
    {
      char *demangled_name = go_demangle (name, 0);
      if (demangled_name != NULL)
	return storage.set_malloc_ptr (demangled_name);
    }

  return name;
}

/* See symtab.h.  */

unsigned int
search_name_hash (enum language language, const char *search_name)
{
  return language_def (language)->la_search_name_hash (search_name);
}

/* See symtab.h.

   This function (or rather its subordinates) have a bunch of loops and
   it would seem to be attractive to put in some QUIT's (though I'm not really
   sure whether it can run long enough to be really important).  But there
   are a few calls for which it would appear to be bad news to quit
   out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c.  (Note
   that there is C++ code below which can error(), but that probably
   doesn't affect these calls since they are looking for a known
   variable and thus can probably assume it will never hit the C++
   code).  */

struct block_symbol
lookup_symbol_in_language (const char *name, const struct block *block,
			   const domain_enum domain, enum language lang,
			   struct field_of_this_result *is_a_field_of_this)
{
  demangle_result_storage storage;
  const char *modified_name = demangle_for_lookup (name, lang, storage);

  return lookup_symbol_aux (modified_name,
			    symbol_name_match_type::FULL,
			    block, domain, lang,
			    is_a_field_of_this);
}

/* See symtab.h.  */

struct block_symbol
lookup_symbol (const char *name, const struct block *block,
	       domain_enum domain,
	       struct field_of_this_result *is_a_field_of_this)
{
  return lookup_symbol_in_language (name, block, domain,
				    current_language->la_language,
				    is_a_field_of_this);
}

/* See symtab.h.  */

struct block_symbol
lookup_symbol_search_name (const char *search_name, const struct block *block,
			   domain_enum domain)
{
  return lookup_symbol_aux (search_name, symbol_name_match_type::SEARCH_NAME,
			    block, domain, language_asm, NULL);
}

/* See symtab.h.  */

struct block_symbol
lookup_language_this (const struct language_defn *lang,
		      const struct block *block)
{
  if (lang->la_name_of_this == NULL || block == NULL)
    return (struct block_symbol) {NULL, NULL};

  if (symbol_lookup_debug > 1)
    {
      struct objfile *objfile = lookup_objfile_from_block (block);

      fprintf_unfiltered (gdb_stdlog,
			  "lookup_language_this (%s, %s (objfile %s))",
			  lang->la_name, host_address_to_string (block),
			  objfile_debug_name (objfile));
    }

  while (block)
    {
      struct symbol *sym;

      sym = block_lookup_symbol (block, lang->la_name_of_this,
				 symbol_name_match_type::SEARCH_NAME,
				 VAR_DOMAIN);
      if (sym != NULL)
	{
	  if (symbol_lookup_debug > 1)
	    {
	      fprintf_unfiltered (gdb_stdlog, " = %s (%s, block %s)\n",
				  SYMBOL_PRINT_NAME (sym),
				  host_address_to_string (sym),
				  host_address_to_string (block));
	    }
	  return (struct block_symbol) {sym, block};
	}
      if (BLOCK_FUNCTION (block))
	break;
      block = BLOCK_SUPERBLOCK (block);
    }

  if (symbol_lookup_debug > 1)
    fprintf_unfiltered (gdb_stdlog, " = NULL\n");
  return (struct block_symbol) {NULL, NULL};
}

/* Given TYPE, a structure/union,
   return 1 if the component named NAME from the ultimate target
   structure/union is defined, otherwise, return 0.  */

static int
check_field (struct type *type, const char *name,
	     struct field_of_this_result *is_a_field_of_this)
{
  int i;

  /* The type may be a stub.  */
  type = check_typedef (type);

  for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--)
    {
      const char *t_field_name = TYPE_FIELD_NAME (type, i);

      if (t_field_name && (strcmp_iw (t_field_name, name) == 0))
	{
	  is_a_field_of_this->type = type;
	  is_a_field_of_this->field = &TYPE_FIELD (type, i);
	  return 1;
	}
    }

  /* C++: If it was not found as a data field, then try to return it
     as a pointer to a method.  */

  for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i)
    {
      if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type, i), name) == 0)
	{
	  is_a_field_of_this->type = type;
	  is_a_field_of_this->fn_field = &TYPE_FN_FIELDLIST (type, i);
	  return 1;
	}
    }

  for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
    if (check_field (TYPE_BASECLASS (type, i), name, is_a_field_of_this))
      return 1;

  return 0;
}

/* Behave like lookup_symbol except that NAME is the natural name
   (e.g., demangled name) of the symbol that we're looking for.  */

static struct block_symbol
lookup_symbol_aux (const char *name, symbol_name_match_type match_type,
		   const struct block *block,
		   const domain_enum domain, enum language language,
		   struct field_of_this_result *is_a_field_of_this)
{
  struct block_symbol result;
  const struct language_defn *langdef;

  if (symbol_lookup_debug)
    {
      struct objfile *objfile = lookup_objfile_from_block (block);

      fprintf_unfiltered (gdb_stdlog,
			  "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n",
			  name, host_address_to_string (block),
			  objfile != NULL
			  ? objfile_debug_name (objfile) : "NULL",
			  domain_name (domain), language_str (language));
    }

  /* Make sure we do something sensible with is_a_field_of_this, since
     the callers that set this parameter to some non-null value will
     certainly use it later.  If we don't set it, the contents of
     is_a_field_of_this are undefined.  */
  if (is_a_field_of_this != NULL)
    memset (is_a_field_of_this, 0, sizeof (*is_a_field_of_this));

  /* Search specified block and its superiors.  Don't search
     STATIC_BLOCK or GLOBAL_BLOCK.  */

  result = lookup_local_symbol (name, match_type, block, domain, language);
  if (result.symbol != NULL)
    {
      if (symbol_lookup_debug)
	{
	  fprintf_unfiltered (gdb_stdlog, "lookup_symbol_aux (...) = %s\n",
			      host_address_to_string (result.symbol));
	}
      return result;
    }

  /* If requested to do so by the caller and if appropriate for LANGUAGE,
     check to see if NAME is a field of `this'.  */

  langdef = language_def (language);

  /* Don't do this check if we are searching for a struct.  It will
     not be found by check_field, but will be found by other
     means.  */
  if (is_a_field_of_this != NULL && domain != STRUCT_DOMAIN)
    {
      result = lookup_language_this (langdef, block);

      if (result.symbol)
	{
	  struct type *t = result.symbol->type;

	  /* I'm not really sure that type of this can ever
	     be typedefed; just be safe.  */
	  t = check_typedef (t);
	  if (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (t))
	    t = TYPE_TARGET_TYPE (t);

	  if (TYPE_CODE (t) != TYPE_CODE_STRUCT
	      && TYPE_CODE (t) != TYPE_CODE_UNION)
	    error (_("Internal error: `%s' is not an aggregate"),
		   langdef->la_name_of_this);

	  if (check_field (t, name, is_a_field_of_this))
	    {
	      if (symbol_lookup_debug)
		{
		  fprintf_unfiltered (gdb_stdlog,
				      "lookup_symbol_aux (...) = NULL\n");
		}
	      return (struct block_symbol) {NULL, NULL};
	    }
	}
    }

  /* Now do whatever is appropriate for LANGUAGE to look
     up static and global variables.  */

  result = langdef->la_lookup_symbol_nonlocal (langdef, name, block, domain);
  if (result.symbol != NULL)
    {
      if (symbol_lookup_debug)
	{
	  fprintf_unfiltered (gdb_stdlog, "lookup_symbol_aux (...) = %s\n",
			      host_address_to_string (result.symbol));
	}
      return result;
    }

  /* Now search all static file-level symbols.  Not strictly correct,
     but more useful than an error.  */

  result = lookup_static_symbol (name, domain);
  if (symbol_lookup_debug)
    {
      fprintf_unfiltered (gdb_stdlog, "lookup_symbol_aux (...) = %s\n",
			  result.symbol != NULL
			    ? host_address_to_string (result.symbol)
			    : "NULL");
    }
  return result;
}

/* Check to see if the symbol is defined in BLOCK or its superiors.
   Don't search STATIC_BLOCK or GLOBAL_BLOCK.  */

static struct block_symbol
lookup_local_symbol (const char *name,
		     symbol_name_match_type match_type,
		     const struct block *block,
		     const domain_enum domain,
		     enum language language)
{
  struct symbol *sym;
  const struct block *static_block = block_static_block (block);
  const char *scope = block_scope (block);
  
  /* Check if either no block is specified or it's a global block.  */

  if (static_block == NULL)
    return (struct block_symbol) {NULL, NULL};

  while (block != static_block)
    {
      sym = lookup_symbol_in_block (name, match_type, block, domain);
      if (sym != NULL)
	return (struct block_symbol) {sym, block};

      if (language == language_cplus || language == language_fortran)
        {
          struct block_symbol blocksym
	    = cp_lookup_symbol_imports_or_template (scope, name, block,
						    domain);

          if (blocksym.symbol != NULL)
            return blocksym;
        }

      if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block))
	break;
      block = BLOCK_SUPERBLOCK (block);
    }

  /* We've reached the end of the function without finding a result.  */

  return (struct block_symbol) {NULL, NULL};
}

/* See symtab.h.  */

struct objfile *
lookup_objfile_from_block (const struct block *block)
{
  struct objfile *obj;
  struct compunit_symtab *cust;

  if (block == NULL)
    return NULL;

  block = block_global_block (block);
  /* Look through all blockvectors.  */
  ALL_COMPUNITS (obj, cust)
    if (block == BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust),
				    GLOBAL_BLOCK))
      {
	if (obj->separate_debug_objfile_backlink)
	  obj = obj->separate_debug_objfile_backlink;

	return obj;
      }

  return NULL;
}

/* See symtab.h.  */

struct symbol *
lookup_symbol_in_block (const char *name, symbol_name_match_type match_type,
			const struct block *block,
			const domain_enum domain)
{
  struct symbol *sym;

  if (symbol_lookup_debug > 1)
    {
      struct objfile *objfile = lookup_objfile_from_block (block);

      fprintf_unfiltered (gdb_stdlog,
			  "lookup_symbol_in_block (%s, %s (objfile %s), %s)",
			  name, host_address_to_string (block),
			  objfile_debug_name (objfile),
			  domain_name (domain));
    }

  sym = block_lookup_symbol (block, name, match_type, domain);
  if (sym)
    {
      if (symbol_lookup_debug > 1)
	{
	  fprintf_unfiltered (gdb_stdlog, " = %s\n",
			      host_address_to_string (sym));
	}
      return fixup_symbol_section (sym, NULL);
    }

  if (symbol_lookup_debug > 1)
    fprintf_unfiltered (gdb_stdlog, " = NULL\n");
  return NULL;
}

/* See symtab.h.  */

struct block_symbol
lookup_global_symbol_from_objfile (struct objfile *main_objfile,
				   const char *name,
				   const domain_enum domain)
{
  struct objfile *objfile;

  for (objfile = main_objfile;
       objfile;
       objfile = objfile_separate_debug_iterate (main_objfile, objfile))
    {
      struct block_symbol result
        = lookup_symbol_in_objfile (objfile, GLOBAL_BLOCK, name, domain);

      if (result.symbol != NULL)
	return result;
    }

  return (struct block_symbol) {NULL, NULL};
}

/* Check to see if the symbol is defined in one of the OBJFILE's
   symtabs.  BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
   depending on whether or not we want to search global symbols or
   static symbols.  */

static struct block_symbol
lookup_symbol_in_objfile_symtabs (struct objfile *objfile, int block_index,
				  const char *name, const domain_enum domain)
{
  struct compunit_symtab *cust;

  gdb_assert (block_index == GLOBAL_BLOCK || block_index == STATIC_BLOCK);

  if (symbol_lookup_debug > 1)
    {
      fprintf_unfiltered (gdb_stdlog,
			  "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)",
			  objfile_debug_name (objfile),
			  block_index == GLOBAL_BLOCK
			  ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
			  name, domain_name (domain));
    }

  ALL_OBJFILE_COMPUNITS (objfile, cust)
    {
      const struct blockvector *bv;
      const struct block *block;
      struct block_symbol result;

      bv = COMPUNIT_BLOCKVECTOR (cust);
      block = BLOCKVECTOR_BLOCK (bv, block_index);
      result.symbol = block_lookup_symbol_primary (block, name, domain);
      result.block = block;
      if (result.symbol != NULL)
	{
	  if (symbol_lookup_debug > 1)
	    {
	      fprintf_unfiltered (gdb_stdlog, " = %s (block %s)\n",
				  host_address_to_string (result.symbol),
				  host_address_to_string (block));
	    }
	  result.symbol = fixup_symbol_section (result.symbol, objfile);
	  return result;

	}
    }

  if (symbol_lookup_debug > 1)
    fprintf_unfiltered (gdb_stdlog, " = NULL\n");
  return (struct block_symbol) {NULL, NULL};
}

/* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols.
   Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
   and all associated separate debug objfiles.

   Normally we only look in OBJFILE, and not any separate debug objfiles
   because the outer loop will cause them to be searched too.  This case is
   different.  Here we're called from search_symbols where it will only
   call us for the the objfile that contains a matching minsym.  */

static struct block_symbol
lookup_symbol_in_objfile_from_linkage_name (struct objfile *objfile,
					    const char *linkage_name,
					    domain_enum domain)
{
  enum language lang = current_language->la_language;
  struct objfile *main_objfile, *cur_objfile;

  demangle_result_storage storage;
  const char *modified_name = demangle_for_lookup (linkage_name, lang, storage);

  if (objfile->separate_debug_objfile_backlink)
    main_objfile = objfile->separate_debug_objfile_backlink;
  else
    main_objfile = objfile;

  for (cur_objfile = main_objfile;
       cur_objfile;
       cur_objfile = objfile_separate_debug_iterate (main_objfile, cur_objfile))
    {
      struct block_symbol result;

      result = lookup_symbol_in_objfile_symtabs (cur_objfile, GLOBAL_BLOCK,
						 modified_name, domain);
      if (result.symbol == NULL)
	result = lookup_symbol_in_objfile_symtabs (cur_objfile, STATIC_BLOCK,
						   modified_name, domain);
      if (result.symbol != NULL)
	return result;
    }

  return (struct block_symbol) {NULL, NULL};
}

/* A helper function that throws an exception when a symbol was found
   in a psymtab but not in a symtab.  */

static void ATTRIBUTE_NORETURN
error_in_psymtab_expansion (int block_index, const char *name,
			    struct compunit_symtab *cust)
{
  error (_("\
Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
%s may be an inlined function, or may be a template function\n	 \
(if a template, try specifying an instantiation: %s<type>)."),
	 block_index == GLOBAL_BLOCK ? "global" : "static",
	 name,
	 symtab_to_filename_for_display (compunit_primary_filetab (cust)),
	 name, name);
}

/* A helper function for various lookup routines that interfaces with
   the "quick" symbol table functions.  */

static struct block_symbol
lookup_symbol_via_quick_fns (struct objfile *objfile, int block_index,
			     const char *name, const domain_enum domain)
{
  struct compunit_symtab *cust;
  const struct blockvector *bv;
  const struct block *block;
  struct block_symbol result;

  if (!objfile->sf)
    return (struct block_symbol) {NULL, NULL};

  if (symbol_lookup_debug > 1)
    {
      fprintf_unfiltered (gdb_stdlog,
			  "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n",
			  objfile_debug_name (objfile),
			  block_index == GLOBAL_BLOCK
			  ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
			  name, domain_name (domain));
    }

  cust = objfile->sf->qf->lookup_symbol (objfile, block_index, name, domain);
  if (cust == NULL)
    {
      if (symbol_lookup_debug > 1)
	{
	  fprintf_unfiltered (gdb_stdlog,
			      "lookup_symbol_via_quick_fns (...) = NULL\n");
	}
      return (struct block_symbol) {NULL, NULL};
    }

  bv = COMPUNIT_BLOCKVECTOR (cust);
  block = BLOCKVECTOR_BLOCK (bv, block_index);
  result.symbol = block_lookup_symbol (block, name,
				       symbol_name_match_type::FULL, domain);
  if (result.symbol == NULL)
    error_in_psymtab_expansion (block_index, name, cust);

  if (symbol_lookup_debug > 1)
    {
      fprintf_unfiltered (gdb_stdlog,
			  "lookup_symbol_via_quick_fns (...) = %s (block %s)\n",
			  host_address_to_string (result.symbol),
			  host_address_to_string (block));
    }

  result.symbol = fixup_symbol_section (result.symbol, objfile);
  result.block = block;
  return result;
}

/* See symtab.h.  */

struct block_symbol
basic_lookup_symbol_nonlocal (const struct language_defn *langdef,
			      const char *name,
			      const struct block *block,
			      const domain_enum domain)
{
  struct block_symbol result;

  /* NOTE: carlton/2003-05-19: The comments below were written when
     this (or what turned into this) was part of lookup_symbol_aux;
     I'm much less worried about these questions now, since these
     decisions have turned out well, but I leave these comments here
     for posterity.  */

  /* NOTE: carlton/2002-12-05: There is a question as to whether or
     not it would be appropriate to search the current global block
     here as well.  (That's what this code used to do before the
     is_a_field_of_this check was moved up.)  On the one hand, it's
     redundant with the lookup in all objfiles search that happens
     next.  On the other hand, if decode_line_1 is passed an argument
     like filename:var, then the user presumably wants 'var' to be
     searched for in filename.  On the third hand, there shouldn't be
     multiple global variables all of which are named 'var', and it's
     not like decode_line_1 has ever restricted its search to only
     global variables in a single filename.  All in all, only
     searching the static block here seems best: it's correct and it's
     cleanest.  */

  /* NOTE: carlton/2002-12-05: There's also a possible performance
     issue here: if you usually search for global symbols in the
     current file, then it would be slightly better to search the
     current global block before searching all the symtabs.  But there
     are other factors that have a much greater effect on performance
     than that one, so I don't think we should worry about that for
     now.  */

  /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip
     the current objfile.  Searching the current objfile first is useful
     for both matching user expectations as well as performance.  */

  result = lookup_symbol_in_static_block (name, block, domain);
  if (result.symbol != NULL)
    return result;

  /* If we didn't find a definition for a builtin type in the static block,
     search for it now.  This is actually the right thing to do and can be
     a massive performance win.  E.g., when debugging a program with lots of
     shared libraries we could search all of them only to find out the
     builtin type isn't defined in any of them.  This is common for types
     like "void".  */
  if (domain == VAR_DOMAIN)
    {
      struct gdbarch *gdbarch;

      if (block == NULL)
	gdbarch = target_gdbarch ();
      else
	gdbarch = block_gdbarch (block);
      result.symbol = language_lookup_primitive_type_as_symbol (langdef,
								gdbarch, name);
      result.block = NULL;
      if (result.symbol != NULL)
	return result;
    }

  return lookup_global_symbol (name, block, domain);
}

/* See symtab.h.  */

struct block_symbol
lookup_symbol_in_static_block (const char *name,
			       const struct block *block,
			       const domain_enum domain)
{
  const struct block *static_block = block_static_block (block);
  struct symbol *sym;

  if (static_block == NULL)
    return (struct block_symbol) {NULL, NULL};

  if (symbol_lookup_debug)
    {
      struct objfile *objfile = lookup_objfile_from_block (static_block);

      fprintf_unfiltered (gdb_stdlog,
			  "lookup_symbol_in_static_block (%s, %s (objfile %s),"
			  " %s)\n",
			  name,
			  host_address_to_string (block),
			  objfile_debug_name (objfile),
			  domain_name (domain));
    }

  sym = lookup_symbol_in_block (name,
				symbol_name_match_type::FULL,
				static_block, domain);
  if (symbol_lookup_debug)
    {
      fprintf_unfiltered (gdb_stdlog,
			  "lookup_symbol_in_static_block (...) = %s\n",
			  sym != NULL ? host_address_to_string (sym) : "NULL");
    }
  return (struct block_symbol) {sym, static_block};
}

/* Perform the standard symbol lookup of NAME in OBJFILE:
   1) First search expanded symtabs, and if not found
   2) Search the "quick" symtabs (partial or .gdb_index).
   BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK.  */

static struct block_symbol
lookup_symbol_in_objfile (struct objfile *objfile, int block_index,
			  const char *name, const domain_enum domain)
{
  struct block_symbol result;

  if (symbol_lookup_debug)
    {
      fprintf_unfiltered (gdb_stdlog,
			  "lookup_symbol_in_objfile (%s, %s, %s, %s)\n",
			  objfile_debug_name (objfile),
			  block_index == GLOBAL_BLOCK
			  ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
			  name, domain_name (domain));
    }

  result = lookup_symbol_in_objfile_symtabs (objfile, block_index,
					     name, domain);
  if (result.symbol != NULL)
    {
      if (symbol_lookup_debug)
	{
	  fprintf_unfiltered (gdb_stdlog,
			      "lookup_symbol_in_objfile (...) = %s"
			      " (in symtabs)\n",
			      host_address_to_string (result.symbol));
	}
      return result;
    }

  result = lookup_symbol_via_quick_fns (objfile, block_index,
					name, domain);
  if (symbol_lookup_debug)
    {
      fprintf_unfiltered (gdb_stdlog,
			  "lookup_symbol_in_objfile (...) = %s%s\n",
			  result.symbol != NULL
			  ? host_address_to_string (result.symbol)
			  : "NULL",
			  result.symbol != NULL ? " (via quick fns)" : "");
    }
  return result;
}

/* See symtab.h.  */

struct block_symbol
lookup_static_symbol (const char *name, const domain_enum domain)
{
  struct symbol_cache *cache = get_symbol_cache (current_program_space);
  struct objfile *objfile;
  struct block_symbol result;
  struct block_symbol_cache *bsc;
  struct symbol_cache_slot *slot;

  /* Lookup in STATIC_BLOCK is not current-objfile-dependent, so just pass
     NULL for OBJFILE_CONTEXT.  */
  result = symbol_cache_lookup (cache, NULL, STATIC_BLOCK, name, domain,
				&bsc, &slot);
  if (result.symbol != NULL)
    {
      if (SYMBOL_LOOKUP_FAILED_P (result))
	return (struct block_symbol) {NULL, NULL};
      return result;
    }

  ALL_OBJFILES (objfile)
    {
      result = lookup_symbol_in_objfile (objfile, STATIC_BLOCK, name, domain);
      if (result.symbol != NULL)
	{
	  /* Still pass NULL for OBJFILE_CONTEXT here.  */
	  symbol_cache_mark_found (bsc, slot, NULL, result.symbol,
				   result.block);
	  return result;
	}
    }

  /* Still pass NULL for OBJFILE_CONTEXT here.  */
  symbol_cache_mark_not_found (bsc, slot, NULL, name, domain);
  return (struct block_symbol) {NULL, NULL};
}

/* Private data to be used with lookup_symbol_global_iterator_cb.  */

struct global_sym_lookup_data
{
  /* The name of the symbol we are searching for.  */
  const char *name;

  /* The domain to use for our search.  */
  domain_enum domain;

  /* The field where the callback should store the symbol if found.
     It should be initialized to {NULL, NULL} before the search is started.  */
  struct block_symbol result;
};

/* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
   It searches by name for a symbol in the GLOBAL_BLOCK of the given
   OBJFILE.  The arguments for the search are passed via CB_DATA,
   which in reality is a pointer to struct global_sym_lookup_data.  */

static int
lookup_symbol_global_iterator_cb (struct objfile *objfile,
				  void *cb_data)
{
  struct global_sym_lookup_data *data =
    (struct global_sym_lookup_data *) cb_data;

  gdb_assert (data->result.symbol == NULL
	      && data->result.block == NULL);

  data->result = lookup_symbol_in_objfile (objfile, GLOBAL_BLOCK,
					   data->name, data->domain);

  /* If we found a match, tell the iterator to stop.  Otherwise,
     keep going.  */
  return (data->result.symbol != NULL);
}

/* See symtab.h.  */

struct block_symbol
lookup_global_symbol (const char *name,
		      const struct block *block,
		      const domain_enum domain)
{
  struct symbol_cache *cache = get_symbol_cache (current_program_space);
  struct block_symbol result;
  struct objfile *objfile;
  struct global_sym_lookup_data lookup_data;
  struct block_symbol_cache *bsc;
  struct symbol_cache_slot *slot;

  objfile = lookup_objfile_from_block (block);

  /* First see if we can find the symbol in the cache.
     This works because we use the current objfile to qualify the lookup.  */
  result = symbol_cache_lookup (cache, objfile, GLOBAL_BLOCK, name, domain,
				&bsc, &slot);
  if (result.symbol != NULL)
    {
      if (SYMBOL_LOOKUP_FAILED_P (result))
	return (struct block_symbol) {NULL, NULL};
      return result;
    }

  /* Call library-specific lookup procedure.  */
  if (objfile != NULL)
    result = solib_global_lookup (objfile, name, domain);

  /* If that didn't work go a global search (of global blocks, heh).  */
  if (result.symbol == NULL)
    {
      memset (&lookup_data, 0, sizeof (lookup_data));
      lookup_data.name = name;
      lookup_data.domain = domain;
      gdbarch_iterate_over_objfiles_in_search_order
	(objfile != NULL ? get_objfile_arch (objfile) : target_gdbarch (),
	 lookup_symbol_global_iterator_cb, &lookup_data, objfile);
      result = lookup_data.result;
    }

  if (result.symbol != NULL)
    symbol_cache_mark_found (bsc, slot, objfile, result.symbol, result.block);
  else
    symbol_cache_mark_not_found (bsc, slot, objfile, name, domain);

  return result;
}

int
symbol_matches_domain (enum language symbol_language,
		       domain_enum symbol_domain,
		       domain_enum domain)
{
  /* For C++ "struct foo { ... }" also defines a typedef for "foo".
     Similarly, any Ada type declaration implicitly defines a typedef.  */
  if (symbol_language == language_cplus
      || symbol_language == language_d
      || symbol_language == language_ada
      || symbol_language == language_rust)
    {
      if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN)
	  && symbol_domain == STRUCT_DOMAIN)
	return 1;
    }
  /* For all other languages, strict match is required.  */
  return (symbol_domain == domain);
}

/* See symtab.h.  */

struct type *
lookup_transparent_type (const char *name)
{
  return current_language->la_lookup_transparent_type (name);
}

/* A helper for basic_lookup_transparent_type that interfaces with the
   "quick" symbol table functions.  */

static struct type *
basic_lookup_transparent_type_quick (struct objfile *objfile, int block_index,
				     const char *name)
{
  struct compunit_symtab *cust;
  const struct blockvector *bv;
  struct block *block;
  struct symbol *sym;

  if (!objfile->sf)
    return NULL;
  cust = objfile->sf->qf->lookup_symbol (objfile, block_index, name,
					 STRUCT_DOMAIN);
  if (cust == NULL)
    return NULL;

  bv = COMPUNIT_BLOCKVECTOR (cust);
  block = BLOCKVECTOR_BLOCK (bv, block_index);
  sym = block_find_symbol (block, name, STRUCT_DOMAIN,
			   block_find_non_opaque_type, NULL);
  if (sym == NULL)
    error_in_psymtab_expansion (block_index, name, cust);
  gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)));
  return SYMBOL_TYPE (sym);
}

/* Subroutine of basic_lookup_transparent_type to simplify it.
   Look up the non-opaque definition of NAME in BLOCK_INDEX of OBJFILE.
   BLOCK_INDEX is either GLOBAL_BLOCK or STATIC_BLOCK.  */

static struct type *
basic_lookup_transparent_type_1 (struct objfile *objfile, int block_index,
				 const char *name)
{
  const struct compunit_symtab *cust;
  const struct blockvector *bv;
  const struct block *block;
  const struct symbol *sym;

  ALL_OBJFILE_COMPUNITS (objfile, cust)
    {
      bv = COMPUNIT_BLOCKVECTOR (cust);
      block = BLOCKVECTOR_BLOCK (bv, block_index);
      sym = block_find_symbol (block, name, STRUCT_DOMAIN,
			       block_find_non_opaque_type, NULL);
      if (sym != NULL)
	{
	  gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)));
	  return SYMBOL_TYPE (sym);
	}
    }

  return NULL;
}

/* The standard implementation of lookup_transparent_type.  This code
   was modeled on lookup_symbol -- the parts not relevant to looking
   up types were just left out.  In particular it's assumed here that
   types are available in STRUCT_DOMAIN and only in file-static or
   global blocks.  */

struct type *
basic_lookup_transparent_type (const char *name)
{
  struct objfile *objfile;
  struct type *t;

  /* Now search all the global symbols.  Do the symtab's first, then
     check the psymtab's.  If a psymtab indicates the existence
     of the desired name as a global, then do psymtab-to-symtab
     conversion on the fly and return the found symbol.  */

  ALL_OBJFILES (objfile)
  {
    t = basic_lookup_transparent_type_1 (objfile, GLOBAL_BLOCK, name);
    if (t)
      return t;
  }

  ALL_OBJFILES (objfile)
  {
    t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name);
    if (t)
      return t;
  }

  /* Now search the static file-level symbols.
     Not strictly correct, but more useful than an error.
     Do the symtab's first, then
     check the psymtab's.  If a psymtab indicates the existence
     of the desired name as a file-level static, then do psymtab-to-symtab
     conversion on the fly and return the found symbol.  */

  ALL_OBJFILES (objfile)
  {
    t = basic_lookup_transparent_type_1 (objfile, STATIC_BLOCK, name);
    if (t)
      return t;
  }

  ALL_OBJFILES (objfile)
  {
    t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name);
    if (t)
      return t;
  }

  return (struct type *) 0;
}

/* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.

   For each symbol that matches, CALLBACK is called.  The symbol is
   passed to the callback.

   If CALLBACK returns false, the iteration ends.  Otherwise, the
   search continues.  */

void
iterate_over_symbols (const struct block *block,
		      const lookup_name_info &name,
		      const domain_enum domain,
		      gdb::function_view<symbol_found_callback_ftype> callback)
{
  struct block_iterator iter;
  struct symbol *sym;

  ALL_BLOCK_SYMBOLS_WITH_NAME (block, name, iter, sym)
    {
      if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
				 SYMBOL_DOMAIN (sym), domain))
	{
	  struct block_symbol block_sym = {sym, block};

	  if (!callback (&block_sym))
	    return;
	}
    }
}

/* Find the compunit symtab associated with PC and SECTION.
   This will read in debug info as necessary.  */

struct compunit_symtab *
find_pc_sect_compunit_symtab (CORE_ADDR pc, struct obj_section *section)
{
  struct compunit_symtab *cust;
  struct compunit_symtab *best_cust = NULL;
  struct objfile *objfile;
  CORE_ADDR distance = 0;
  struct bound_minimal_symbol msymbol;

  /* If we know that this is not a text address, return failure.  This is
     necessary because we loop based on the block's high and low code
     addresses, which do not include the data ranges, and because
     we call find_pc_sect_psymtab which has a similar restriction based
     on the partial_symtab's texthigh and textlow.  */
  msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
  if (msymbol.minsym
      && (MSYMBOL_TYPE (msymbol.minsym) == mst_data
	  || MSYMBOL_TYPE (msymbol.minsym) == mst_bss
	  || MSYMBOL_TYPE (msymbol.minsym) == mst_abs
	  || MSYMBOL_TYPE (msymbol.minsym) == mst_file_data
	  || MSYMBOL_TYPE (msymbol.minsym) == mst_file_bss))
    return NULL;

  /* Search all symtabs for the one whose file contains our address, and which
     is the smallest of all the ones containing the address.  This is designed
     to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
     and symtab b is at 0x2000-0x3000.  So the GLOBAL_BLOCK for a is from
     0x1000-0x4000, but for address 0x2345 we want to return symtab b.

     This happens for native ecoff format, where code from included files
     gets its own symtab.  The symtab for the included file should have
     been read in already via the dependency mechanism.
     It might be swifter to create several symtabs with the same name
     like xcoff does (I'm not sure).

     It also happens for objfiles that have their functions reordered.
     For these, the symtab we are looking for is not necessarily read in.  */

  ALL_COMPUNITS (objfile, cust)
  {
    struct block *b;
    const struct blockvector *bv;

    bv = COMPUNIT_BLOCKVECTOR (cust);
    b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);

    if (BLOCK_START (b) <= pc
	&& BLOCK_END (b) > pc
	&& (distance == 0
	    || BLOCK_END (b) - BLOCK_START (b) < distance))
      {
	/* For an objfile that has its functions reordered,
	   find_pc_psymtab will find the proper partial symbol table
	   and we simply return its corresponding symtab.  */
	/* In order to better support objfiles that contain both
	   stabs and coff debugging info, we continue on if a psymtab
	   can't be found.  */
	if ((objfile->flags & OBJF_REORDERED) && objfile->sf)
	  {
	    struct compunit_symtab *result;

	    result
	      = objfile->sf->qf->find_pc_sect_compunit_symtab (objfile,
							       msymbol,
							       pc, section,
							       0);
	    if (result != NULL)
	      return result;
	  }
	if (section != 0)
	  {
	    struct block_iterator iter;
	    struct symbol *sym = NULL;

	    ALL_BLOCK_SYMBOLS (b, iter, sym)
	      {
		fixup_symbol_section (sym, objfile);
		if (matching_obj_sections (SYMBOL_OBJ_SECTION (objfile, sym),
					   section))
		  break;
	      }
	    if (sym == NULL)
	      continue;		/* No symbol in this symtab matches
				   section.  */
	  }
	distance = BLOCK_END (b) - BLOCK_START (b);
	best_cust = cust;
      }
  }

  if (best_cust != NULL)
    return best_cust;

  /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs).  */

  ALL_OBJFILES (objfile)
  {
    struct compunit_symtab *result;

    if (!objfile->sf)
      continue;
    result = objfile->sf->qf->find_pc_sect_compunit_symtab (objfile,
							    msymbol,
							    pc, section,
							    1);
    if (result != NULL)
      return result;
  }

  return NULL;
}

/* Find the compunit symtab associated with PC.
   This will read in debug info as necessary.
   Backward compatibility, no section.  */

struct compunit_symtab *
find_pc_compunit_symtab (CORE_ADDR pc)
{
  return find_pc_sect_compunit_symtab (pc, find_pc_mapped_section (pc));
}

/* See symtab.h.  */

struct symbol *
find_symbol_at_address (CORE_ADDR address)
{
  struct objfile *objfile;

  ALL_OBJFILES (objfile)
  {
    if (objfile->sf == NULL
	|| objfile->sf->qf->find_compunit_symtab_by_address == NULL)
      continue;

    struct compunit_symtab *symtab
      = objfile->sf->qf->find_compunit_symtab_by_address (objfile, address);
    if (symtab != NULL)
      {
	const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (symtab);

	for (int i = GLOBAL_BLOCK; i <= STATIC_BLOCK; ++i)
	  {
	    struct block *b = BLOCKVECTOR_BLOCK (bv, i);
	    struct block_iterator iter;
	    struct symbol *sym;

	    ALL_BLOCK_SYMBOLS (b, iter, sym)
	    {
	      if (SYMBOL_CLASS (sym) == LOC_STATIC
		  && SYMBOL_VALUE_ADDRESS (sym) == address)
		return sym;
	    }
	  }
      }
  }

  return NULL;
}



/* Find the source file and line number for a given PC value and SECTION.
   Return a structure containing a symtab pointer, a line number,
   and a pc range for the entire source line.
   The value's .pc field is NOT the specified pc.
   NOTCURRENT nonzero means, if specified pc is on a line boundary,
   use the line that ends there.  Otherwise, in that case, the line
   that begins there is used.  */

/* The big complication here is that a line may start in one file, and end just
   before the start of another file.  This usually occurs when you #include
   code in the middle of a subroutine.  To properly find the end of a line's PC
   range, we must search all symtabs associated with this compilation unit, and
   find the one whose first PC is closer than that of the next line in this
   symtab.  */

struct symtab_and_line
find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent)
{
  struct compunit_symtab *cust;
  struct symtab *iter_s;
  struct linetable *l;
  int len;
  struct linetable_entry *item;
  const struct blockvector *bv;
  struct bound_minimal_symbol msymbol;

  /* Info on best line seen so far, and where it starts, and its file.  */

  struct linetable_entry *best = NULL;
  CORE_ADDR best_end = 0;
  struct symtab *best_symtab = 0;

  /* Store here the first line number
     of a file which contains the line at the smallest pc after PC.
     If we don't find a line whose range contains PC,
     we will use a line one less than this,
     with a range from the start of that file to the first line's pc.  */
  struct linetable_entry *alt = NULL;

  /* Info on best line seen in this file.  */

  struct linetable_entry *prev;

  /* If this pc is not from the current frame,
     it is the address of the end of a call instruction.
     Quite likely that is the start of the following statement.
     But what we want is the statement containing the instruction.
     Fudge the pc to make sure we get that.  */

  /* It's tempting to assume that, if we can't find debugging info for
     any function enclosing PC, that we shouldn't search for line
     number info, either.  However, GAS can emit line number info for
     assembly files --- very helpful when debugging hand-written
     assembly code.  In such a case, we'd have no debug info for the
     function, but we would have line info.  */

  if (notcurrent)
    pc -= 1;

  /* elz: added this because this function returned the wrong
     information if the pc belongs to a stub (import/export)
     to call a shlib function.  This stub would be anywhere between
     two functions in the target, and the line info was erroneously
     taken to be the one of the line before the pc.  */

  /* RT: Further explanation:

   * We have stubs (trampolines) inserted between procedures.
   *
   * Example: "shr1" exists in a shared library, and a "shr1" stub also
   * exists in the main image.
   *
   * In the minimal symbol table, we have a bunch of symbols
   * sorted by start address.  The stubs are marked as "trampoline",
   * the others appear as text. E.g.:
   *
   *  Minimal symbol table for main image
   *     main:  code for main (text symbol)
   *     shr1: stub  (trampoline symbol)
   *     foo:   code for foo (text symbol)
   *     ...
   *  Minimal symbol table for "shr1" image:
   *     ...
   *     shr1: code for shr1 (text symbol)
   *     ...
   *
   * So the code below is trying to detect if we are in the stub
   * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
   * and if found,  do the symbolization from the real-code address
   * rather than the stub address.
   *
   * Assumptions being made about the minimal symbol table:
   *   1. lookup_minimal_symbol_by_pc() will return a trampoline only
   *      if we're really in the trampoline.s If we're beyond it (say
   *      we're in "foo" in the above example), it'll have a closer
   *      symbol (the "foo" text symbol for example) and will not
   *      return the trampoline.
   *   2. lookup_minimal_symbol_text() will find a real text symbol
   *      corresponding to the trampoline, and whose address will
   *      be different than the trampoline address.  I put in a sanity
   *      check for the address being the same, to avoid an
   *      infinite recursion.
   */
  msymbol = lookup_minimal_symbol_by_pc (pc);
  if (msymbol.minsym != NULL)
    if (MSYMBOL_TYPE (msymbol.minsym) == mst_solib_trampoline)
      {
	struct bound_minimal_symbol mfunsym
	  = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol.minsym),
					NULL);

	if (mfunsym.minsym == NULL)
	  /* I eliminated this warning since it is coming out
	   * in the following situation:
	   * gdb shmain // test program with shared libraries
	   * (gdb) break shr1  // function in shared lib
	   * Warning: In stub for ...
	   * In the above situation, the shared lib is not loaded yet,
	   * so of course we can't find the real func/line info,
	   * but the "break" still works, and the warning is annoying.
	   * So I commented out the warning.  RT */
	  /* warning ("In stub for %s; unable to find real function/line info",
	     SYMBOL_LINKAGE_NAME (msymbol)); */
	  ;
	/* fall through */
	else if (BMSYMBOL_VALUE_ADDRESS (mfunsym)
		 == BMSYMBOL_VALUE_ADDRESS (msymbol))
	  /* Avoid infinite recursion */
	  /* See above comment about why warning is commented out.  */
	  /* warning ("In stub for %s; unable to find real function/line info",
	     SYMBOL_LINKAGE_NAME (msymbol)); */
	  ;
	/* fall through */
	else
	  return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym), 0);
      }

  symtab_and_line val;
  val.pspace = current_program_space;

  cust = find_pc_sect_compunit_symtab (pc, section);
  if (cust == NULL)
    {
      /* If no symbol information, return previous pc.  */
      if (notcurrent)
	pc++;
      val.pc = pc;
      return val;
    }

  bv = COMPUNIT_BLOCKVECTOR (cust);

  /* Look at all the symtabs that share this blockvector.
     They all have the same apriori range, that we found was right;
     but they have different line tables.  */

  ALL_COMPUNIT_FILETABS (cust, iter_s)
    {
      /* Find the best line in this symtab.  */
      l = SYMTAB_LINETABLE (iter_s);
      if (!l)
	continue;
      len = l->nitems;
      if (len <= 0)
	{
	  /* I think len can be zero if the symtab lacks line numbers
	     (e.g. gcc -g1).  (Either that or the LINETABLE is NULL;
	     I'm not sure which, and maybe it depends on the symbol
	     reader).  */
	  continue;
	}

      prev = NULL;
      item = l->item;		/* Get first line info.  */

      /* Is this file's first line closer than the first lines of other files?
         If so, record this file, and its first line, as best alternate.  */
      if (item->pc > pc && (!alt || item->pc < alt->pc))
	alt = item;

      auto pc_compare = [](const CORE_ADDR & comp_pc,
			   const struct linetable_entry & lhs)->bool
      {
	return comp_pc < lhs.pc;
      };

      struct linetable_entry *first = item;
      struct linetable_entry *last = item + len;
      item = std::upper_bound (first, last, pc, pc_compare);
      if (item != first)
	prev = item - 1;		/* Found a matching item.  */

      /* At this point, prev points at the line whose start addr is <= pc, and
         item points at the next line.  If we ran off the end of the linetable
         (pc >= start of the last line), then prev == item.  If pc < start of
         the first line, prev will not be set.  */

      /* Is this file's best line closer than the best in the other files?
         If so, record this file, and its best line, as best so far.  Don't
         save prev if it represents the end of a function (i.e. line number
         0) instead of a real line.  */

      if (prev && prev->line && (!best || prev->pc > best->pc))
	{
	  best = prev;
	  best_symtab = iter_s;

	  /* Discard BEST_END if it's before the PC of the current BEST.  */
	  if (best_end <= best->pc)
	    best_end = 0;
	}

      /* If another line (denoted by ITEM) is in the linetable and its
	 PC is after BEST's PC, but before the current BEST_END, then
	 use ITEM's PC as the new best_end.  */
      if (best && item < last && item->pc > best->pc
	  && (best_end == 0 || best_end > item->pc))
	best_end = item->pc;
    }

  if (!best_symtab)
    {
      /* If we didn't find any line number info, just return zeros.
	 We used to return alt->line - 1 here, but that could be
	 anywhere; if we don't have line number info for this PC,
	 don't make some up.  */
      val.pc = pc;
    }
  else if (best->line == 0)
    {
      /* If our best fit is in a range of PC's for which no line
	 number info is available (line number is zero) then we didn't
	 find any valid line information.  */
      val.pc = pc;
    }
  else
    {
      val.symtab = best_symtab;
      val.line = best->line;
      val.pc = best->pc;
      if (best_end && (!alt || best_end < alt->pc))
	val.end = best_end;
      else if (alt)
	val.end = alt->pc;
      else
	val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
    }
  val.section = section;
  return val;
}

/* Backward compatibility (no section).  */

struct symtab_and_line
find_pc_line (CORE_ADDR pc, int notcurrent)
{
  struct obj_section *section;

  section = find_pc_overlay (pc);
  if (pc_in_unmapped_range (pc, section))
    pc = overlay_mapped_address (pc, section);
  return find_pc_sect_line (pc, section, notcurrent);
}

/* See symtab.h.  */

struct symtab *
find_pc_line_symtab (CORE_ADDR pc)
{
  struct symtab_and_line sal;

  /* This always passes zero for NOTCURRENT to find_pc_line.
     There are currently no callers that ever pass non-zero.  */
  sal = find_pc_line (pc, 0);
  return sal.symtab;
}

/* Find line number LINE in any symtab whose name is the same as
   SYMTAB.

   If found, return the symtab that contains the linetable in which it was
   found, set *INDEX to the index in the linetable of the best entry
   found, and set *EXACT_MATCH nonzero if the value returned is an
   exact match.

   If not found, return NULL.  */

struct symtab *
find_line_symtab (struct symtab *symtab, int line,
		  int *index, int *exact_match)
{
  int exact = 0;  /* Initialized here to avoid a compiler warning.  */

  /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
     so far seen.  */

  int best_index;
  struct linetable *best_linetable;
  struct symtab *best_symtab;

  /* First try looking it up in the given symtab.  */
  best_linetable = SYMTAB_LINETABLE (symtab);
  best_symtab = symtab;
  best_index = find_line_common (best_linetable, line, &exact, 0);
  if (best_index < 0 || !exact)
    {
      /* Didn't find an exact match.  So we better keep looking for
         another symtab with the same name.  In the case of xcoff,
         multiple csects for one source file (produced by IBM's FORTRAN
         compiler) produce multiple symtabs (this is unavoidable
         assuming csects can be at arbitrary places in memory and that
         the GLOBAL_BLOCK of a symtab has a begin and end address).  */

      /* BEST is the smallest linenumber > LINE so far seen,
         or 0 if none has been seen so far.
         BEST_INDEX and BEST_LINETABLE identify the item for it.  */
      int best;

      struct objfile *objfile;
      struct compunit_symtab *cu;
      struct symtab *s;

      if (best_index >= 0)
	best = best_linetable->item[best_index].line;
      else
	best = 0;

      ALL_OBJFILES (objfile)
      {
	if (objfile->sf)
	  objfile->sf->qf->expand_symtabs_with_fullname (objfile,
						   symtab_to_fullname (symtab));
      }

      ALL_FILETABS (objfile, cu, s)
      {
	struct linetable *l;
	int ind;

	if (FILENAME_CMP (symtab->filename, s->filename) != 0)
	  continue;
	if (FILENAME_CMP (symtab_to_fullname (symtab),
			  symtab_to_fullname (s)) != 0)
	  continue;	
	l = SYMTAB_LINETABLE (s);
	ind = find_line_common (l, line, &exact, 0);
	if (ind >= 0)
	  {
	    if (exact)
	      {
		best_index = ind;
		best_linetable = l;
		best_symtab = s;
		goto done;
	      }
	    if (best == 0 || l->item[ind].line < best)
	      {
		best = l->item[ind].line;
		best_index = ind;
		best_linetable = l;
		best_symtab = s;
	      }
	  }
      }
    }
done:
  if (best_index < 0)
    return NULL;

  if (index)
    *index = best_index;
  if (exact_match)
    *exact_match = exact;

  return best_symtab;
}

/* Given SYMTAB, returns all the PCs function in the symtab that
   exactly match LINE.  Returns an empty vector if there are no exact
   matches, but updates BEST_ITEM in this case.  */

std::vector<CORE_ADDR>
find_pcs_for_symtab_line (struct symtab *symtab, int line,
			  struct linetable_entry **best_item)
{
  int start = 0;
  std::vector<CORE_ADDR> result;

  /* First, collect all the PCs that are at this line.  */
  while (1)
    {
      int was_exact;
      int idx;

      idx = find_line_common (SYMTAB_LINETABLE (symtab), line, &was_exact,
			      start);
      if (idx < 0)
	break;

      if (!was_exact)
	{
	  struct linetable_entry *item = &SYMTAB_LINETABLE (symtab)->item[idx];

	  if (*best_item == NULL || item->line < (*best_item)->line)
	    *best_item = item;

	  break;
	}

      result.push_back (SYMTAB_LINETABLE (symtab)->item[idx].pc);
      start = idx + 1;
    }

  return result;
}


/* Set the PC value for a given source file and line number and return true.
   Returns zero for invalid line number (and sets the PC to 0).
   The source file is specified with a struct symtab.  */

int
find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
{
  struct linetable *l;
  int ind;

  *pc = 0;
  if (symtab == 0)
    return 0;

  symtab = find_line_symtab (symtab, line, &ind, NULL);
  if (symtab != NULL)
    {
      l = SYMTAB_LINETABLE (symtab);
      *pc = l->item[ind].pc;
      return 1;
    }
  else
    return 0;
}

/* Find the range of pc values in a line.
   Store the starting pc of the line into *STARTPTR
   and the ending pc (start of next line) into *ENDPTR.
   Returns 1 to indicate success.
   Returns 0 if could not find the specified line.  */

int
find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
		    CORE_ADDR *endptr)
{
  CORE_ADDR startaddr;
  struct symtab_and_line found_sal;

  startaddr = sal.pc;
  if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
    return 0;

  /* This whole function is based on address.  For example, if line 10 has
     two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
     "info line *0x123" should say the line goes from 0x100 to 0x200
     and "info line *0x355" should say the line goes from 0x300 to 0x400.
     This also insures that we never give a range like "starts at 0x134
     and ends at 0x12c".  */

  found_sal = find_pc_sect_line (startaddr, sal.section, 0);
  if (found_sal.line != sal.line)
    {
      /* The specified line (sal) has zero bytes.  */
      *startptr = found_sal.pc;
      *endptr = found_sal.pc;
    }
  else
    {
      *startptr = found_sal.pc;
      *endptr = found_sal.end;
    }
  return 1;
}

/* Given a line table and a line number, return the index into the line
   table for the pc of the nearest line whose number is >= the specified one.
   Return -1 if none is found.  The value is >= 0 if it is an index.
   START is the index at which to start searching the line table.

   Set *EXACT_MATCH nonzero if the value returned is an exact match.  */

static int
find_line_common (struct linetable *l, int lineno,
		  int *exact_match, int start)
{
  int i;
  int len;

  /* BEST is the smallest linenumber > LINENO so far seen,
     or 0 if none has been seen so far.
     BEST_INDEX identifies the item for it.  */

  int best_index = -1;
  int best = 0;

  *exact_match = 0;

  if (lineno <= 0)
    return -1;
  if (l == 0)
    return -1;

  len = l->nitems;
  for (i = start; i < len; i++)
    {
      struct linetable_entry *item = &(l->item[i]);

      if (item->line == lineno)
	{
	  /* Return the first (lowest address) entry which matches.  */
	  *exact_match = 1;
	  return i;
	}

      if (item->line > lineno && (best == 0 || item->line < best))
	{
	  best = item->line;
	  best_index = i;
	}
    }

  /* If we got here, we didn't get an exact match.  */
  return best_index;
}

int
find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
{
  struct symtab_and_line sal;

  sal = find_pc_line (pc, 0);
  *startptr = sal.pc;
  *endptr = sal.end;
  return sal.symtab != 0;
}

/* Helper for find_function_start_sal.  Does most of the work, except
   setting the sal's symbol.  */

static symtab_and_line
find_function_start_sal_1 (CORE_ADDR func_addr, obj_section *section,
			   bool funfirstline)
{
  symtab_and_line sal = find_pc_sect_line (func_addr, section, 0);

  if (funfirstline && sal.symtab != NULL
      && (COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (sal.symtab))
	  || SYMTAB_LANGUAGE (sal.symtab) == language_asm))
    {
      struct gdbarch *gdbarch = get_objfile_arch (SYMTAB_OBJFILE (sal.symtab));

      sal.pc = func_addr;
      if (gdbarch_skip_entrypoint_p (gdbarch))
	sal.pc = gdbarch_skip_entrypoint (gdbarch, sal.pc);
      return sal;
    }

  /* We always should have a line for the function start address.
     If we don't, something is odd.  Create a plain SAL referring
     just the PC and hope that skip_prologue_sal (if requested)
     can find a line number for after the prologue.  */
  if (sal.pc < func_addr)
    {
      sal = {};
      sal.pspace = current_program_space;
      sal.pc = func_addr;
      sal.section = section;
    }

  if (funfirstline)
    skip_prologue_sal (&sal);

  return sal;
}

/* See symtab.h.  */

symtab_and_line
find_function_start_sal (CORE_ADDR func_addr, obj_section *section,
			 bool funfirstline)
{
  symtab_and_line sal
    = find_function_start_sal_1 (func_addr, section, funfirstline);

  /* find_function_start_sal_1 does a linetable search, so it finds
     the symtab and linenumber, but not a symbol.  Fill in the
     function symbol too.  */
  sal.symbol = find_pc_sect_containing_function (sal.pc, sal.section);

  return sal;
}

/* See symtab.h.  */

symtab_and_line
find_function_start_sal (symbol *sym, bool funfirstline)
{
  fixup_symbol_section (sym, NULL);
  symtab_and_line sal
    = find_function_start_sal_1 (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)),
				 SYMBOL_OBJ_SECTION (symbol_objfile (sym), sym),
				 funfirstline);
  sal.symbol = sym;
  return sal;
}


/* Given a function start address FUNC_ADDR and SYMTAB, find the first
   address for that function that has an entry in SYMTAB's line info
   table.  If such an entry cannot be found, return FUNC_ADDR
   unaltered.  */

static CORE_ADDR
skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab)
{
  CORE_ADDR func_start, func_end;
  struct linetable *l;
  int i;

  /* Give up if this symbol has no lineinfo table.  */
  l = SYMTAB_LINETABLE (symtab);
  if (l == NULL)
    return func_addr;

  /* Get the range for the function's PC values, or give up if we
     cannot, for some reason.  */
  if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end))
    return func_addr;

  /* Linetable entries are ordered by PC values, see the commentary in
     symtab.h where `struct linetable' is defined.  Thus, the first
     entry whose PC is in the range [FUNC_START..FUNC_END[ is the
     address we are looking for.  */
  for (i = 0; i < l->nitems; i++)
    {
      struct linetable_entry *item = &(l->item[i]);

      /* Don't use line numbers of zero, they mark special entries in
	 the table.  See the commentary on symtab.h before the
	 definition of struct linetable.  */
      if (item->line > 0 && func_start <= item->pc && item->pc < func_end)
	return item->pc;
    }

  return func_addr;
}

/* Adjust SAL to the first instruction past the function prologue.
   If the PC was explicitly specified, the SAL is not changed.
   If the line number was explicitly specified, at most the SAL's PC
   is updated.  If SAL is already past the prologue, then do nothing.  */

void
skip_prologue_sal (struct symtab_and_line *sal)
{
  struct symbol *sym;
  struct symtab_and_line start_sal;
  CORE_ADDR pc, saved_pc;
  struct obj_section *section;
  const char *name;
  struct objfile *objfile;
  struct gdbarch *gdbarch;
  const struct block *b, *function_block;
  int force_skip, skip;

  /* Do not change the SAL if PC was specified explicitly.  */
  if (sal->explicit_pc)
    return;

  scoped_restore_current_pspace_and_thread restore_pspace_thread;

  switch_to_program_space_and_thread (sal->pspace);

  sym = find_pc_sect_function (sal->pc, sal->section);
  if (sym != NULL)
    {
      fixup_symbol_section (sym, NULL);

      objfile = symbol_objfile (sym);
      pc = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym));
      section = SYMBOL_OBJ_SECTION (objfile, sym);
      name = SYMBOL_LINKAGE_NAME (sym);
    }
  else
    {
      struct bound_minimal_symbol msymbol
        = lookup_minimal_symbol_by_pc_section (sal->pc, sal->section);

      if (msymbol.minsym == NULL)
	return;

      objfile = msymbol.objfile;
      pc = BMSYMBOL_VALUE_ADDRESS (msymbol);
      section = MSYMBOL_OBJ_SECTION (objfile, msymbol.minsym);
      name = MSYMBOL_LINKAGE_NAME (msymbol.minsym);
    }

  gdbarch = get_objfile_arch (objfile);

  /* Process the prologue in two passes.  In the first pass try to skip the
     prologue (SKIP is true) and verify there is a real need for it (indicated
     by FORCE_SKIP).  If no such reason was found run a second pass where the
     prologue is not skipped (SKIP is false).  */

  skip = 1;
  force_skip = 1;

  /* Be conservative - allow direct PC (without skipping prologue) only if we
     have proven the CU (Compilation Unit) supports it.  sal->SYMTAB does not
     have to be set by the caller so we use SYM instead.  */
  if (sym != NULL
      && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym))))
    force_skip = 0;

  saved_pc = pc;
  do
    {
      pc = saved_pc;

      /* If the function is in an unmapped overlay, use its unmapped LMA address,
	 so that gdbarch_skip_prologue has something unique to work on.  */
      if (section_is_overlay (section) && !section_is_mapped (section))
	pc = overlay_unmapped_address (pc, section);

      /* Skip "first line" of function (which is actually its prologue).  */
      pc += gdbarch_deprecated_function_start_offset (gdbarch);
      if (gdbarch_skip_entrypoint_p (gdbarch))
        pc = gdbarch_skip_entrypoint (gdbarch, pc);
      if (skip)
	pc = gdbarch_skip_prologue_noexcept (gdbarch, pc);

      /* For overlays, map pc back into its mapped VMA range.  */
      pc = overlay_mapped_address (pc, section);

      /* Calculate line number.  */
      start_sal = find_pc_sect_line (pc, section, 0);

      /* Check if gdbarch_skip_prologue left us in mid-line, and the next
	 line is still part of the same function.  */
      if (skip && start_sal.pc != pc
	  && (sym ? (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)) <= start_sal.end
		     && start_sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
	      : (lookup_minimal_symbol_by_pc_section (start_sal.end, section).minsym
		 == lookup_minimal_symbol_by_pc_section (pc, section).minsym)))
	{
	  /* First pc of next line */
	  pc = start_sal.end;
	  /* Recalculate the line number (might not be N+1).  */
	  start_sal = find_pc_sect_line (pc, section, 0);
	}

      /* On targets with executable formats that don't have a concept of
	 constructors (ELF with .init has, PE doesn't), gcc emits a call
	 to `__main' in `main' between the prologue and before user
	 code.  */
      if (gdbarch_skip_main_prologue_p (gdbarch)
	  && name && strcmp_iw (name, "main") == 0)
	{
	  pc = gdbarch_skip_main_prologue (gdbarch, pc);
	  /* Recalculate the line number (might not be N+1).  */
	  start_sal = find_pc_sect_line (pc, section, 0);
	  force_skip = 1;
	}
    }
  while (!force_skip && skip--);

  /* If we still don't have a valid source line, try to find the first
     PC in the lineinfo table that belongs to the same function.  This
     happens with COFF debug info, which does not seem to have an
     entry in lineinfo table for the code after the prologue which has
     no direct relation to source.  For example, this was found to be
     the case with the DJGPP target using "gcc -gcoff" when the
     compiler inserted code after the prologue to make sure the stack
     is aligned.  */
  if (!force_skip && sym && start_sal.symtab == NULL)
    {
      pc = skip_prologue_using_lineinfo (pc, symbol_symtab (sym));
      /* Recalculate the line number.  */
      start_sal = find_pc_sect_line (pc, section, 0);
    }

  /* If we're already past the prologue, leave SAL unchanged.  Otherwise
     forward SAL to the end of the prologue.  */
  if (sal->pc >= pc)
    return;

  sal->pc = pc;
  sal->section = section;

  /* Unless the explicit_line flag was set, update the SAL line
     and symtab to correspond to the modified PC location.  */
  if (sal->explicit_line)
    return;

  sal->symtab = start_sal.symtab;
  sal->line = start_sal.line;
  sal->end = start_sal.end;

  /* Check if we are now inside an inlined function.  If we can,
     use the call site of the function instead.  */
  b = block_for_pc_sect (sal->pc, sal->section);
  function_block = NULL;
  while (b != NULL)
    {
      if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
	function_block = b;
      else if (BLOCK_FUNCTION (b) != NULL)
	break;
      b = BLOCK_SUPERBLOCK (b);
    }
  if (function_block != NULL
      && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0)
    {
      sal->line = SYMBOL_LINE (BLOCK_FUNCTION (function_block));
      sal->symtab = symbol_symtab (BLOCK_FUNCTION (function_block));
    }
}

/* Given PC at the function's start address, attempt to find the
   prologue end using SAL information.  Return zero if the skip fails.

   A non-optimized prologue traditionally has one SAL for the function
   and a second for the function body.  A single line function has
   them both pointing at the same line.

   An optimized prologue is similar but the prologue may contain
   instructions (SALs) from the instruction body.  Need to skip those
   while not getting into the function body.

   The functions end point and an increasing SAL line are used as
   indicators of the prologue's endpoint.

   This code is based on the function refine_prologue_limit
   (found in ia64).  */

CORE_ADDR
skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr)
{
  struct symtab_and_line prologue_sal;
  CORE_ADDR start_pc;
  CORE_ADDR end_pc;
  const struct block *bl;

  /* Get an initial range for the function.  */
  find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
  start_pc += gdbarch_deprecated_function_start_offset (gdbarch);

  prologue_sal = find_pc_line (start_pc, 0);
  if (prologue_sal.line != 0)
    {
      /* For languages other than assembly, treat two consecutive line
	 entries at the same address as a zero-instruction prologue.
	 The GNU assembler emits separate line notes for each instruction
	 in a multi-instruction macro, but compilers generally will not
	 do this.  */
      if (prologue_sal.symtab->language != language_asm)
	{
	  struct linetable *linetable = SYMTAB_LINETABLE (prologue_sal.symtab);
	  int idx = 0;

	  /* Skip any earlier lines, and any end-of-sequence marker
	     from a previous function.  */
	  while (linetable->item[idx].pc != prologue_sal.pc
		 || linetable->item[idx].line == 0)
	    idx++;

	  if (idx+1 < linetable->nitems
	      && linetable->item[idx+1].line != 0
	      && linetable->item[idx+1].pc == start_pc)
	    return start_pc;
	}

      /* If there is only one sal that covers the entire function,
	 then it is probably a single line function, like
	 "foo(){}".  */
      if (prologue_sal.end >= end_pc)
	return 0;

      while (prologue_sal.end < end_pc)
	{
	  struct symtab_and_line sal;

	  sal = find_pc_line (prologue_sal.end, 0);
	  if (sal.line == 0)
	    break;
	  /* Assume that a consecutive SAL for the same (or larger)
	     line mark the prologue -> body transition.  */
	  if (sal.line >= prologue_sal.line)
	    break;
	  /* Likewise if we are in a different symtab altogether
	     (e.g. within a file included via #include).  */
	  if (sal.symtab != prologue_sal.symtab)
	    break;

	  /* The line number is smaller.  Check that it's from the
	     same function, not something inlined.  If it's inlined,
	     then there is no point comparing the line numbers.  */
	  bl = block_for_pc (prologue_sal.end);
	  while (bl)
	    {
	      if (block_inlined_p (bl))
		break;
	      if (BLOCK_FUNCTION (bl))
		{
		  bl = NULL;
		  break;
		}
	      bl = BLOCK_SUPERBLOCK (bl);
	    }
	  if (bl != NULL)
	    break;

	  /* The case in which compiler's optimizer/scheduler has
	     moved instructions into the prologue.  We look ahead in
	     the function looking for address ranges whose
	     corresponding line number is less the first one that we
	     found for the function.  This is more conservative then
	     refine_prologue_limit which scans a large number of SALs
	     looking for any in the prologue.  */
	  prologue_sal = sal;
	}
    }

  if (prologue_sal.end < end_pc)
    /* Return the end of this line, or zero if we could not find a
       line.  */
    return prologue_sal.end;
  else
    /* Don't return END_PC, which is past the end of the function.  */
    return prologue_sal.pc;
}

/* See symtab.h.  */

symbol *
find_function_alias_target (bound_minimal_symbol msymbol)
{
  CORE_ADDR func_addr;
  if (!msymbol_is_function (msymbol.objfile, msymbol.minsym, &func_addr))
    return NULL;

  symbol *sym = find_pc_function (func_addr);
  if (sym != NULL
      && SYMBOL_CLASS (sym) == LOC_BLOCK
      && BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)) == func_addr)
    return sym;

  return NULL;
}


/* If P is of the form "operator[ \t]+..." where `...' is
   some legitimate operator text, return a pointer to the
   beginning of the substring of the operator text.
   Otherwise, return "".  */

static const char *
operator_chars (const char *p, const char **end)
{
  *end = "";
  if (!startswith (p, CP_OPERATOR_STR))
    return *end;
  p += CP_OPERATOR_LEN;

  /* Don't get faked out by `operator' being part of a longer
     identifier.  */
  if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
    return *end;

  /* Allow some whitespace between `operator' and the operator symbol.  */
  while (*p == ' ' || *p == '\t')
    p++;

  /* Recognize 'operator TYPENAME'.  */

  if (isalpha (*p) || *p == '_' || *p == '$')
    {
      const char *q = p + 1;

      while (isalnum (*q) || *q == '_' || *q == '$')
	q++;
      *end = q;
      return p;
    }

  while (*p)
    switch (*p)
      {
      case '\\':			/* regexp quoting */
	if (p[1] == '*')
	  {
	    if (p[2] == '=')		/* 'operator\*=' */
	      *end = p + 3;
	    else			/* 'operator\*'  */
	      *end = p + 2;
	    return p;
	  }
	else if (p[1] == '[')
	  {
	    if (p[2] == ']')
	      error (_("mismatched quoting on brackets, "
		       "try 'operator\\[\\]'"));
	    else if (p[2] == '\\' && p[3] == ']')
	      {
		*end = p + 4;	/* 'operator\[\]' */
		return p;
	      }
	    else
	      error (_("nothing is allowed between '[' and ']'"));
	  }
	else
	  {
	    /* Gratuitous qoute: skip it and move on.  */
	    p++;
	    continue;
	  }
	break;
      case '!':
      case '=':
      case '*':
      case '/':
      case '%':
      case '^':
	if (p[1] == '=')
	  *end = p + 2;
	else
	  *end = p + 1;
	return p;
      case '<':
      case '>':
      case '+':
      case '-':
      case '&':
      case '|':
	if (p[0] == '-' && p[1] == '>')
	  {
	    /* Struct pointer member operator 'operator->'.  */
	    if (p[2] == '*')
	      {
		*end = p + 3;	/* 'operator->*' */
		return p;
	      }
	    else if (p[2] == '\\')
	      {
		*end = p + 4;	/* Hopefully 'operator->\*' */
		return p;
	      }
	    else
	      {
		*end = p + 2;	/* 'operator->' */
		return p;
	      }
	  }
	if (p[1] == '=' || p[1] == p[0])
	  *end = p + 2;
	else
	  *end = p + 1;
	return p;
      case '~':
      case ',':
	*end = p + 1;
	return p;
      case '(':
	if (p[1] != ')')
	  error (_("`operator ()' must be specified "
		   "without whitespace in `()'"));
	*end = p + 2;
	return p;
      case '?':
	if (p[1] != ':')
	  error (_("`operator ?:' must be specified "
		   "without whitespace in `?:'"));
	*end = p + 2;
	return p;
      case '[':
	if (p[1] != ']')
	  error (_("`operator []' must be specified "
		   "without whitespace in `[]'"));
	*end = p + 2;
	return p;
      default:
	error (_("`operator %s' not supported"), p);
	break;
      }

  *end = "";
  return *end;
}


/* Data structure to maintain printing state for output_source_filename.  */

struct output_source_filename_data
{
  /* Cache of what we've seen so far.  */
  struct filename_seen_cache *filename_seen_cache;

  /* Flag of whether we're printing the first one.  */
  int first;
};

/* Slave routine for sources_info.  Force line breaks at ,'s.
   NAME is the name to print.
   DATA contains the state for printing and watching for duplicates.  */

static void
output_source_filename (const char *name,
			struct output_source_filename_data *data)
{
  /* Since a single source file can result in several partial symbol
     tables, we need to avoid printing it more than once.  Note: if
     some of the psymtabs are read in and some are not, it gets
     printed both under "Source files for which symbols have been
     read" and "Source files for which symbols will be read in on
     demand".  I consider this a reasonable way to deal with the
     situation.  I'm not sure whether this can also happen for
     symtabs; it doesn't hurt to check.  */

  /* Was NAME already seen?  */
  if (data->filename_seen_cache->seen (name))
    {
      /* Yes; don't print it again.  */
      return;
    }

  /* No; print it and reset *FIRST.  */
  if (! data->first)
    printf_filtered (", ");
  data->first = 0;

  wrap_here ("");
  fputs_filtered (name, gdb_stdout);
}

/* A callback for map_partial_symbol_filenames.  */

static void
output_partial_symbol_filename (const char *filename, const char *fullname,
				void *data)
{
  output_source_filename (fullname ? fullname : filename,
			  (struct output_source_filename_data *) data);
}

static void
info_sources_command (const char *ignore, int from_tty)
{
  struct compunit_symtab *cu;
  struct symtab *s;
  struct objfile *objfile;
  struct output_source_filename_data data;

  if (!have_full_symbols () && !have_partial_symbols ())
    {
      error (_("No symbol table is loaded.  Use the \"file\" command."));
    }

  filename_seen_cache filenames_seen;

  data.filename_seen_cache = &filenames_seen;

  printf_filtered ("Source files for which symbols have been read in:\n\n");

  data.first = 1;
  ALL_FILETABS (objfile, cu, s)
  {
    const char *fullname = symtab_to_fullname (s);

    output_source_filename (fullname, &data);
  }
  printf_filtered ("\n\n");

  printf_filtered ("Source files for which symbols "
		   "will be read in on demand:\n\n");

  filenames_seen.clear ();
  data.first = 1;
  map_symbol_filenames (output_partial_symbol_filename, &data,
			1 /*need_fullname*/);
  printf_filtered ("\n");
}

/* Compare FILE against all the NFILES entries of FILES.  If BASENAMES is
   non-zero compare only lbasename of FILES.  */

static int
file_matches (const char *file, const char *files[], int nfiles, int basenames)
{
  int i;

  if (file != NULL && nfiles != 0)
    {
      for (i = 0; i < nfiles; i++)
	{
	  if (compare_filenames_for_search (file, (basenames
						   ? lbasename (files[i])
						   : files[i])))
	    return 1;
	}
    }
  else if (nfiles == 0)
    return 1;
  return 0;
}

/* Helper function for sort_search_symbols_remove_dups and qsort.  Can only
   sort symbols, not minimal symbols.  */

int
symbol_search::compare_search_syms (const symbol_search &sym_a,
				    const symbol_search &sym_b)
{
  int c;

  c = FILENAME_CMP (symbol_symtab (sym_a.symbol)->filename,
		    symbol_symtab (sym_b.symbol)->filename);
  if (c != 0)
    return c;

  if (sym_a.block != sym_b.block)
    return sym_a.block - sym_b.block;

  return strcmp (SYMBOL_PRINT_NAME (sym_a.symbol),
		 SYMBOL_PRINT_NAME (sym_b.symbol));
}

/* Returns true if the type_name of symbol_type of SYM matches TREG.
   If SYM has no symbol_type or symbol_name, returns false.  */

bool
treg_matches_sym_type_name (const compiled_regex &treg,
			    const struct symbol *sym)
{
  struct type *sym_type;
  std::string printed_sym_type_name;

  if (symbol_lookup_debug > 1)
    {
      fprintf_unfiltered (gdb_stdlog,
			  "treg_matches_sym_type_name\n     sym %s\n",
			  SYMBOL_NATURAL_NAME (sym));
    }

  sym_type = SYMBOL_TYPE (sym);
  if (sym_type == NULL)
    return false;

  {
    scoped_switch_to_sym_language_if_auto l (sym);

    printed_sym_type_name = type_to_string (sym_type);
  }


  if (symbol_lookup_debug > 1)
    {
      fprintf_unfiltered (gdb_stdlog,
			  "     sym_type_name %s\n",
			  printed_sym_type_name.c_str ());
    }


  if (printed_sym_type_name.empty ())
    return false;

  return treg.exec (printed_sym_type_name.c_str (), 0, NULL, 0) == 0;
}


/* Sort the symbols in RESULT and remove duplicates.  */

static void
sort_search_symbols_remove_dups (std::vector<symbol_search> *result)
{
  std::sort (result->begin (), result->end ());
  result->erase (std::unique (result->begin (), result->end ()),
		 result->end ());
}

/* Search the symbol table for matches to the regular expression REGEXP,
   returning the results.

   Only symbols of KIND are searched:
   VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
                      and constants (enums).
		      if T_REGEXP is not NULL, only returns var that have
		      a type matching regular expression T_REGEXP.
   FUNCTIONS_DOMAIN - search all functions
   TYPES_DOMAIN     - search all type names
   ALL_DOMAIN       - an internal error for this function

   Within each file the results are sorted locally; each symtab's global and
   static blocks are separately alphabetized.
   Duplicate entries are removed.  */

std::vector<symbol_search>
search_symbols (const char *regexp, enum search_domain kind,
		const char *t_regexp,
		int nfiles, const char *files[])
{
  struct compunit_symtab *cust;
  const struct blockvector *bv;
  struct block *b;
  int i = 0;
  struct block_iterator iter;
  struct symbol *sym;
  struct objfile *objfile;
  struct minimal_symbol *msymbol;
  int found_misc = 0;
  static const enum minimal_symbol_type types[]
    = {mst_data, mst_text, mst_abs};
  static const enum minimal_symbol_type types2[]
    = {mst_bss, mst_file_text, mst_abs};
  static const enum minimal_symbol_type types3[]
    = {mst_file_data, mst_solib_trampoline, mst_abs};
  static const enum minimal_symbol_type types4[]
    = {mst_file_bss, mst_text_gnu_ifunc, mst_abs};
  enum minimal_symbol_type ourtype;
  enum minimal_symbol_type ourtype2;
  enum minimal_symbol_type ourtype3;
  enum minimal_symbol_type ourtype4;
  std::vector<symbol_search> result;
  gdb::optional<compiled_regex> preg;
  gdb::optional<compiled_regex> treg;

  gdb_assert (kind <= TYPES_DOMAIN);

  ourtype = types[kind];
  ourtype2 = types2[kind];
  ourtype3 = types3[kind];
  ourtype4 = types4[kind];

  if (regexp != NULL)
    {
      /* Make sure spacing is right for C++ operators.
         This is just a courtesy to make the matching less sensitive
         to how many spaces the user leaves between 'operator'
         and <TYPENAME> or <OPERATOR>.  */
      const char *opend;
      const char *opname = operator_chars (regexp, &opend);

      if (*opname)
	{
	  int fix = -1;		/* -1 means ok; otherwise number of
                                    spaces needed.  */

	  if (isalpha (*opname) || *opname == '_' || *opname == '$')
	    {
	      /* There should 1 space between 'operator' and 'TYPENAME'.  */
	      if (opname[-1] != ' ' || opname[-2] == ' ')
		fix = 1;
	    }
	  else
	    {
	      /* There should 0 spaces between 'operator' and 'OPERATOR'.  */
	      if (opname[-1] == ' ')
		fix = 0;
	    }
	  /* If wrong number of spaces, fix it.  */
	  if (fix >= 0)
	    {
	      char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);

	      sprintf (tmp, "operator%.*s%s", fix, " ", opname);
	      regexp = tmp;
	    }
	}

      int cflags = REG_NOSUB | (case_sensitivity == case_sensitive_off
				? REG_ICASE : 0);
      preg.emplace (regexp, cflags, _("Invalid regexp"));
    }

  if (t_regexp != NULL)
    {
      int cflags = REG_NOSUB | (case_sensitivity == case_sensitive_off
				? REG_ICASE : 0);
      treg.emplace (t_regexp, cflags, _("Invalid regexp"));
    }

  /* Search through the partial symtabs *first* for all symbols
     matching the regexp.  That way we don't have to reproduce all of
     the machinery below.  */
  expand_symtabs_matching ([&] (const char *filename, bool basenames)
			   {
			     return file_matches (filename, files, nfiles,
						  basenames);
			   },
			   lookup_name_info::match_any (),
			   [&] (const char *symname)
			   {
			     return (!preg.has_value ()
				     || preg->exec (symname,
						    0, NULL, 0) == 0);
			   },
			   NULL,
			   kind);

  /* Here, we search through the minimal symbol tables for functions
     and variables that match, and force their symbols to be read.
     This is in particular necessary for demangled variable names,
     which are no longer put into the partial symbol tables.
     The symbol will then be found during the scan of symtabs below.

     For functions, find_pc_symtab should succeed if we have debug info
     for the function, for variables we have to call
     lookup_symbol_in_objfile_from_linkage_name to determine if the variable
     has debug info.
     If the lookup fails, set found_misc so that we will rescan to print
     any matching symbols without debug info.
     We only search the objfile the msymbol came from, we no longer search
     all objfiles.  In large programs (1000s of shared libs) searching all
     objfiles is not worth the pain.  */

  if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
    {
      ALL_MSYMBOLS (objfile, msymbol)
      {
        QUIT;

	if (msymbol->created_by_gdb)
	  continue;

	if (MSYMBOL_TYPE (msymbol) == ourtype
	    || MSYMBOL_TYPE (msymbol) == ourtype2
	    || MSYMBOL_TYPE (msymbol) == ourtype3
	    || MSYMBOL_TYPE (msymbol) == ourtype4)
	  {
	    if (!preg.has_value ()
		|| preg->exec (MSYMBOL_NATURAL_NAME (msymbol), 0,
			       NULL, 0) == 0)
	      {
		/* Note: An important side-effect of these lookup functions
		   is to expand the symbol table if msymbol is found, for the
		   benefit of the next loop on ALL_COMPUNITS.  */
		if (kind == FUNCTIONS_DOMAIN
		    ? (find_pc_compunit_symtab
		       (MSYMBOL_VALUE_ADDRESS (objfile, msymbol)) == NULL)
		    : (lookup_symbol_in_objfile_from_linkage_name
		       (objfile, MSYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
		       .symbol == NULL))
		  found_misc = 1;
	      }
	  }
      }
    }

  ALL_COMPUNITS (objfile, cust)
  {
    bv = COMPUNIT_BLOCKVECTOR (cust);
    for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
      {
	b = BLOCKVECTOR_BLOCK (bv, i);
	ALL_BLOCK_SYMBOLS (b, iter, sym)
	  {
	    struct symtab *real_symtab = symbol_symtab (sym);

	    QUIT;

	    /* Check first sole REAL_SYMTAB->FILENAME.  It does not need to be
	       a substring of symtab_to_fullname as it may contain "./" etc.  */
	    if ((file_matches (real_symtab->filename, files, nfiles, 0)
		 || ((basenames_may_differ
		      || file_matches (lbasename (real_symtab->filename),
				       files, nfiles, 1))
		     && file_matches (symtab_to_fullname (real_symtab),
				      files, nfiles, 0)))
		&& ((!preg.has_value ()
		     || preg->exec (SYMBOL_NATURAL_NAME (sym), 0,
				    NULL, 0) == 0)
		    && ((kind == VARIABLES_DOMAIN
			 && SYMBOL_CLASS (sym) != LOC_TYPEDEF
			 && SYMBOL_CLASS (sym) != LOC_UNRESOLVED
			 && SYMBOL_CLASS (sym) != LOC_BLOCK
			 /* LOC_CONST can be used for more than just enums,
			    e.g., c++ static const members.
			    We only want to skip enums here.  */
			 && !(SYMBOL_CLASS (sym) == LOC_CONST
			      && (TYPE_CODE (SYMBOL_TYPE (sym))
				  == TYPE_CODE_ENUM))
			 && (!treg.has_value ()
			     || treg_matches_sym_type_name (*treg, sym)))
			|| (kind == FUNCTIONS_DOMAIN
			    && SYMBOL_CLASS (sym) == LOC_BLOCK
			    && (!treg.has_value ()
				|| treg_matches_sym_type_name (*treg, sym)))
			|| (kind == TYPES_DOMAIN
			    && SYMBOL_CLASS (sym) == LOC_TYPEDEF))))
	      {
		/* match */
		result.emplace_back (i, sym);
	      }
	  }
      }
  }

  if (!result.empty ())
    sort_search_symbols_remove_dups (&result);

  /* If there are no eyes, avoid all contact.  I mean, if there are
     no debug symbols, then add matching minsyms.  But if the user wants
     to see symbols matching a type regexp, then never give a minimal symbol,
     as we assume that a minimal symbol does not have a type.  */

  if ((found_misc || (nfiles == 0 && kind != FUNCTIONS_DOMAIN))
      && !treg.has_value ())
    {
      ALL_MSYMBOLS (objfile, msymbol)
      {
        QUIT;

	if (msymbol->created_by_gdb)
	  continue;

	if (MSYMBOL_TYPE (msymbol) == ourtype
	    || MSYMBOL_TYPE (msymbol) == ourtype2
	    || MSYMBOL_TYPE (msymbol) == ourtype3
	    || MSYMBOL_TYPE (msymbol) == ourtype4)
	  {
	    if (!preg.has_value ()
		|| preg->exec (MSYMBOL_NATURAL_NAME (msymbol), 0,
			       NULL, 0) == 0)
	      {
		/* For functions we can do a quick check of whether the
		   symbol might be found via find_pc_symtab.  */
		if (kind != FUNCTIONS_DOMAIN
		    || (find_pc_compunit_symtab
			(MSYMBOL_VALUE_ADDRESS (objfile, msymbol)) == NULL))
		  {
		    if (lookup_symbol_in_objfile_from_linkage_name
			(objfile, MSYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
			.symbol == NULL)
		      {
			/* match */
			result.emplace_back (i, msymbol, objfile);
		      }
		  }
	      }
	  }
      }
    }

  return result;
}

/* Helper function for symtab_symbol_info, this function uses
   the data returned from search_symbols() to print information
   regarding the match to gdb_stdout.  If LAST is not NULL,
   print file and line number information for the symbol as
   well.  Skip printing the filename if it matches LAST.  */

static void
print_symbol_info (enum search_domain kind,
		   struct symbol *sym,
		   int block, const char *last)
{
  scoped_switch_to_sym_language_if_auto l (sym);
  struct symtab *s = symbol_symtab (sym);

  if (last != NULL)
    {
      const char *s_filename = symtab_to_filename_for_display (s);

      if (filename_cmp (last, s_filename) != 0)
	{
	  fputs_filtered ("\nFile ", gdb_stdout);
	  fputs_filtered (s_filename, gdb_stdout);
	  fputs_filtered (":\n", gdb_stdout);
	}

      if (SYMBOL_LINE (sym) != 0)
	printf_filtered ("%d:\t", SYMBOL_LINE (sym));
      else
	puts_filtered ("\t");
    }

  if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
    printf_filtered ("static ");

  /* Typedef that is not a C++ class.  */
  if (kind == TYPES_DOMAIN
      && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
    typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
  /* variable, func, or typedef-that-is-c++-class.  */
  else if (kind < TYPES_DOMAIN
	   || (kind == TYPES_DOMAIN
	       && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
    {
      type_print (SYMBOL_TYPE (sym),
		  (SYMBOL_CLASS (sym) == LOC_TYPEDEF
		   ? "" : SYMBOL_PRINT_NAME (sym)),
		  gdb_stdout, 0);

      printf_filtered (";\n");
    }
}

/* This help function for symtab_symbol_info() prints information
   for non-debugging symbols to gdb_stdout.  */

static void
print_msymbol_info (struct bound_minimal_symbol msymbol)
{
  struct gdbarch *gdbarch = get_objfile_arch (msymbol.objfile);
  char *tmp;

  if (gdbarch_addr_bit (gdbarch) <= 32)
    tmp = hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol)
			     & (CORE_ADDR) 0xffffffff,
			     8);
  else
    tmp = hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol),
			     16);
  printf_filtered ("%s  %s\n",
		   tmp, MSYMBOL_PRINT_NAME (msymbol.minsym));
}

/* This is the guts of the commands "info functions", "info types", and
   "info variables".  It calls search_symbols to find all matches and then
   print_[m]symbol_info to print out some useful information about the
   matches.  */

static void
symtab_symbol_info (bool quiet,
		    const char *regexp, enum search_domain kind,
		    const char *t_regexp, int from_tty)
{
  static const char * const classnames[] =
    {"variable", "function", "type"};
  const char *last_filename = "";
  int first = 1;

  gdb_assert (kind <= TYPES_DOMAIN);

  /* Must make sure that if we're interrupted, symbols gets freed.  */
  std::vector<symbol_search> symbols = search_symbols (regexp, kind,
						       t_regexp, 0, NULL);

  if (!quiet)
    {
      if (regexp != NULL)
	{
	  if (t_regexp != NULL)
	    printf_filtered
	      (_("All %ss matching regular expression \"%s\""
		 " with type matching regulation expression \"%s\":\n"),
	       classnames[kind], regexp, t_regexp);
	  else
	    printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
			     classnames[kind], regexp);
	}
      else
	{
	  if (t_regexp != NULL)
	    printf_filtered
	      (_("All defined %ss"
		 " with type matching regulation expression \"%s\" :\n"),
	       classnames[kind], t_regexp);
	  else
	    printf_filtered (_("All defined %ss:\n"), classnames[kind]);
	}
    }

  for (const symbol_search &p : symbols)
    {
      QUIT;

      if (p.msymbol.minsym != NULL)
	{
	  if (first)
	    {
	      if (!quiet)
		printf_filtered (_("\nNon-debugging symbols:\n"));
	      first = 0;
	    }
	  print_msymbol_info (p.msymbol);
	}
      else
	{
	  print_symbol_info (kind,
			     p.symbol,
			     p.block,
			     last_filename);
	  last_filename
	    = symtab_to_filename_for_display (symbol_symtab (p.symbol));
	}
    }
}

static void
info_variables_command (const char *args, int from_tty)
{
  std::string regexp;
  std::string t_regexp;
  bool quiet = false;

  while (args != NULL
	 && extract_info_print_args (&args, &quiet, &regexp, &t_regexp))
    ;

  if (args != NULL)
    report_unrecognized_option_error ("info variables", args);

  symtab_symbol_info (quiet,
		      regexp.empty () ? NULL : regexp.c_str (),
		      VARIABLES_DOMAIN,
		      t_regexp.empty () ? NULL : t_regexp.c_str (),
		      from_tty);
}


static void
info_functions_command (const char *args, int from_tty)
{
  std::string regexp;
  std::string t_regexp;
  bool quiet = false;

  while (args != NULL
	 && extract_info_print_args (&args, &quiet, &regexp, &t_regexp))
    ;

  if (args != NULL)
    report_unrecognized_option_error ("info functions", args);

  symtab_symbol_info (quiet,
		      regexp.empty () ? NULL : regexp.c_str (),
		      FUNCTIONS_DOMAIN,
		      t_regexp.empty () ? NULL : t_regexp.c_str (),
		      from_tty);
}


static void
info_types_command (const char *regexp, int from_tty)
{
  symtab_symbol_info (false, regexp, TYPES_DOMAIN, NULL, from_tty);
}

/* Breakpoint all functions matching regular expression.  */

void
rbreak_command_wrapper (char *regexp, int from_tty)
{
  rbreak_command (regexp, from_tty);
}

static void
rbreak_command (const char *regexp, int from_tty)
{
  std::string string;
  const char **files = NULL;
  const char *file_name;
  int nfiles = 0;

  if (regexp)
    {
      const char *colon = strchr (regexp, ':');

      if (colon && *(colon + 1) != ':')
	{
	  int colon_index;
	  char *local_name;

	  colon_index = colon - regexp;
	  local_name = (char *) alloca (colon_index + 1);
	  memcpy (local_name, regexp, colon_index);
	  local_name[colon_index--] = 0;
	  while (isspace (local_name[colon_index]))
	    local_name[colon_index--] = 0;
	  file_name = local_name;
	  files = &file_name;
	  nfiles = 1;
	  regexp = skip_spaces (colon + 1);
	}
    }

  std::vector<symbol_search> symbols = search_symbols (regexp,
						       FUNCTIONS_DOMAIN,
						       NULL,
						       nfiles, files);

  scoped_rbreak_breakpoints finalize;
  for (const symbol_search &p : symbols)
    {
      if (p.msymbol.minsym == NULL)
	{
	  struct symtab *symtab = symbol_symtab (p.symbol);
	  const char *fullname = symtab_to_fullname (symtab);

	  string = string_printf ("%s:'%s'", fullname,
				  SYMBOL_LINKAGE_NAME (p.symbol));
	  break_command (&string[0], from_tty);
	  print_symbol_info (FUNCTIONS_DOMAIN, p.symbol, p.block, NULL);
	}
      else
	{
	  string = string_printf ("'%s'",
				  MSYMBOL_LINKAGE_NAME (p.msymbol.minsym));

	  break_command (&string[0], from_tty);
	  printf_filtered ("<function, no debug info> %s;\n",
			   MSYMBOL_PRINT_NAME (p.msymbol.minsym));
	}
    }
}


/* Evaluate if SYMNAME matches LOOKUP_NAME.  */

static int
compare_symbol_name (const char *symbol_name, language symbol_language,
		     const lookup_name_info &lookup_name,
		     completion_match_result &match_res)
{
  const language_defn *lang = language_def (symbol_language);

  symbol_name_matcher_ftype *name_match
    = get_symbol_name_matcher (lang, lookup_name);

  return name_match (symbol_name, lookup_name, &match_res);
}

/*  See symtab.h.  */

void
completion_list_add_name (completion_tracker &tracker,
			  language symbol_language,
			  const char *symname,
			  const lookup_name_info &lookup_name,
			  const char *text, const char *word)
{
  completion_match_result &match_res
    = tracker.reset_completion_match_result ();

  /* Clip symbols that cannot match.  */
  if (!compare_symbol_name (symname, symbol_language, lookup_name, match_res))
    return;

  /* Refresh SYMNAME from the match string.  It's potentially
     different depending on language.  (E.g., on Ada, the match may be
     the encoded symbol name wrapped in "<>").  */
  symname = match_res.match.match ();
  gdb_assert (symname != NULL);

  /* We have a match for a completion, so add SYMNAME to the current list
     of matches.  Note that the name is moved to freshly malloc'd space.  */

  {
    gdb::unique_xmalloc_ptr<char> completion
      = make_completion_match_str (symname, text, word);

    /* Here we pass the match-for-lcd object to add_completion.  Some
       languages match the user text against substrings of symbol
       names in some cases.  E.g., in C++, "b push_ba" completes to
       "std::vector::push_back", "std::string::push_back", etc., and
       in this case we want the completion lowest common denominator
       to be "push_back" instead of "std::".  */
    tracker.add_completion (std::move (completion),
			    &match_res.match_for_lcd, text, word);
  }
}

/* completion_list_add_name wrapper for struct symbol.  */

static void
completion_list_add_symbol (completion_tracker &tracker,
			    symbol *sym,
			    const lookup_name_info &lookup_name,
			    const char *text, const char *word)
{
  completion_list_add_name (tracker, SYMBOL_LANGUAGE (sym),
			    SYMBOL_NATURAL_NAME (sym),
			    lookup_name, text, word);
}

/* completion_list_add_name wrapper for struct minimal_symbol.  */

static void
completion_list_add_msymbol (completion_tracker &tracker,
			     minimal_symbol *sym,
			     const lookup_name_info &lookup_name,
			     const char *text, const char *word)
{
  completion_list_add_name (tracker, MSYMBOL_LANGUAGE (sym),
			    MSYMBOL_NATURAL_NAME (sym),
			    lookup_name, text, word);
}


/* ObjC: In case we are completing on a selector, look as the msymbol
   again and feed all the selectors into the mill.  */

static void
completion_list_objc_symbol (completion_tracker &tracker,
			     struct minimal_symbol *msymbol,
			     const lookup_name_info &lookup_name,
			     const char *text, const char *word)
{
  static char *tmp = NULL;
  static unsigned int tmplen = 0;

  const char *method, *category, *selector;
  char *tmp2 = NULL;

  method = MSYMBOL_NATURAL_NAME (msymbol);

  /* Is it a method?  */
  if ((method[0] != '-') && (method[0] != '+'))
    return;

  if (text[0] == '[')
    /* Complete on shortened method method.  */
    completion_list_add_name (tracker, language_objc,
			      method + 1,
			      lookup_name,
			      text, word);

  while ((strlen (method) + 1) >= tmplen)
    {
      if (tmplen == 0)
	tmplen = 1024;
      else
	tmplen *= 2;
      tmp = (char *) xrealloc (tmp, tmplen);
    }
  selector = strchr (method, ' ');
  if (selector != NULL)
    selector++;

  category = strchr (method, '(');

  if ((category != NULL) && (selector != NULL))
    {
      memcpy (tmp, method, (category - method));
      tmp[category - method] = ' ';
      memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
      completion_list_add_name (tracker, language_objc, tmp,
				lookup_name, text, word);
      if (text[0] == '[')
	completion_list_add_name (tracker, language_objc, tmp + 1,
				  lookup_name, text, word);
    }

  if (selector != NULL)
    {
      /* Complete on selector only.  */
      strcpy (tmp, selector);
      tmp2 = strchr (tmp, ']');
      if (tmp2 != NULL)
	*tmp2 = '\0';

      completion_list_add_name (tracker, language_objc, tmp,
				lookup_name, text, word);
    }
}

/* Break the non-quoted text based on the characters which are in
   symbols.  FIXME: This should probably be language-specific.  */

static const char *
language_search_unquoted_string (const char *text, const char *p)
{
  for (; p > text; --p)
    {
      if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
	continue;
      else
	{
	  if ((current_language->la_language == language_objc))
	    {
	      if (p[-1] == ':')     /* Might be part of a method name.  */
		continue;
	      else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
		p -= 2;             /* Beginning of a method name.  */
	      else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
		{                   /* Might be part of a method name.  */
		  const char *t = p;

		  /* Seeing a ' ' or a '(' is not conclusive evidence
		     that we are in the middle of a method name.  However,
		     finding "-[" or "+[" should be pretty un-ambiguous.
		     Unfortunately we have to find it now to decide.  */

		  while (t > text)
		    if (isalnum (t[-1]) || t[-1] == '_' ||
			t[-1] == ' '    || t[-1] == ':' ||
			t[-1] == '('    || t[-1] == ')')
		      --t;
		    else
		      break;

		  if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
		    p = t - 2;      /* Method name detected.  */
		  /* Else we leave with p unchanged.  */
		}
	    }
	  break;
	}
    }
  return p;
}

static void
completion_list_add_fields (completion_tracker &tracker,
			    struct symbol *sym,
			    const lookup_name_info &lookup_name,
			    const char *text, const char *word)
{
  if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
    {
      struct type *t = SYMBOL_TYPE (sym);
      enum type_code c = TYPE_CODE (t);
      int j;

      if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
	for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
	  if (TYPE_FIELD_NAME (t, j))
	    completion_list_add_name (tracker, SYMBOL_LANGUAGE (sym),
				      TYPE_FIELD_NAME (t, j),
				      lookup_name, text, word);
    }
}

/* See symtab.h.  */

bool
symbol_is_function_or_method (symbol *sym)
{
  switch (TYPE_CODE (SYMBOL_TYPE (sym)))
    {
    case TYPE_CODE_FUNC:
    case TYPE_CODE_METHOD:
      return true;
    default:
      return false;
    }
}

/* See symtab.h.  */

bool
symbol_is_function_or_method (minimal_symbol *msymbol)
{
  switch (MSYMBOL_TYPE (msymbol))
    {
    case mst_text:
    case mst_text_gnu_ifunc:
    case mst_solib_trampoline:
    case mst_file_text:
      return true;
    default:
      return false;
    }
}

/* See symtab.h.  */

bound_minimal_symbol
find_gnu_ifunc (const symbol *sym)
{
  if (SYMBOL_CLASS (sym) != LOC_BLOCK)
    return {};

  lookup_name_info lookup_name (SYMBOL_SEARCH_NAME (sym),
				symbol_name_match_type::SEARCH_NAME);
  struct objfile *objfile = symbol_objfile (sym);

  CORE_ADDR address = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym));
  minimal_symbol *ifunc = NULL;

  iterate_over_minimal_symbols (objfile, lookup_name,
				[&] (minimal_symbol *minsym)
    {
      if (MSYMBOL_TYPE (minsym) == mst_text_gnu_ifunc
	  || MSYMBOL_TYPE (minsym) == mst_data_gnu_ifunc)
	{
	  CORE_ADDR msym_addr = MSYMBOL_VALUE_ADDRESS (objfile, minsym);
	  if (MSYMBOL_TYPE (minsym) == mst_data_gnu_ifunc)
	    {
	      struct gdbarch *gdbarch = get_objfile_arch (objfile);
	      msym_addr
		= gdbarch_convert_from_func_ptr_addr (gdbarch,
						      msym_addr,
						      current_top_target ());
	    }
	  if (msym_addr == address)
	    {
	      ifunc = minsym;
	      return true;
	    }
	}
      return false;
    });

  if (ifunc != NULL)
    return {ifunc, objfile};
  return {};
}

/* Add matching symbols from SYMTAB to the current completion list.  */

static void
add_symtab_completions (struct compunit_symtab *cust,
			completion_tracker &tracker,
			complete_symbol_mode mode,
			const lookup_name_info &lookup_name,
			const char *text, const char *word,
			enum type_code code)
{
  struct symbol *sym;
  const struct block *b;
  struct block_iterator iter;
  int i;

  if (cust == NULL)
    return;

  for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
    {
      QUIT;
      b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), i);
      ALL_BLOCK_SYMBOLS (b, iter, sym)
	{
	  if (completion_skip_symbol (mode, sym))
	    continue;

	  if (code == TYPE_CODE_UNDEF
	      || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
		  && TYPE_CODE (SYMBOL_TYPE (sym)) == code))
	    completion_list_add_symbol (tracker, sym,
					lookup_name,
					text, word);
	}
    }
}

void
default_collect_symbol_completion_matches_break_on
  (completion_tracker &tracker, complete_symbol_mode mode,
   symbol_name_match_type name_match_type,
   const char *text, const char *word,
   const char *break_on, enum type_code code)
{
  /* Problem: All of the symbols have to be copied because readline
     frees them.  I'm not going to worry about this; hopefully there
     won't be that many.  */

  struct symbol *sym;
  struct compunit_symtab *cust;
  struct minimal_symbol *msymbol;
  struct objfile *objfile;
  const struct block *b;
  const struct block *surrounding_static_block, *surrounding_global_block;
  struct block_iterator iter;
  /* The symbol we are completing on.  Points in same buffer as text.  */
  const char *sym_text;

  /* Now look for the symbol we are supposed to complete on.  */
  if (mode == complete_symbol_mode::LINESPEC)
    sym_text = text;
  else
  {
    const char *p;
    char quote_found;
    const char *quote_pos = NULL;

    /* First see if this is a quoted string.  */
    quote_found = '\0';
    for (p = text; *p != '\0'; ++p)
      {
	if (quote_found != '\0')
	  {
	    if (*p == quote_found)
	      /* Found close quote.  */
	      quote_found = '\0';
	    else if (*p == '\\' && p[1] == quote_found)
	      /* A backslash followed by the quote character
	         doesn't end the string.  */
	      ++p;
	  }
	else if (*p == '\'' || *p == '"')
	  {
	    quote_found = *p;
	    quote_pos = p;
	  }
      }
    if (quote_found == '\'')
      /* A string within single quotes can be a symbol, so complete on it.  */
      sym_text = quote_pos + 1;
    else if (quote_found == '"')
      /* A double-quoted string is never a symbol, nor does it make sense
         to complete it any other way.  */
      {
	return;
      }
    else
      {
	/* It is not a quoted string.  Break it based on the characters
	   which are in symbols.  */
	while (p > text)
	  {
	    if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0'
		|| p[-1] == ':' || strchr (break_on, p[-1]) != NULL)
	      --p;
	    else
	      break;
	  }
	sym_text = p;
      }
  }

  lookup_name_info lookup_name (sym_text, name_match_type, true);

  /* At this point scan through the misc symbol vectors and add each
     symbol you find to the list.  Eventually we want to ignore
     anything that isn't a text symbol (everything else will be
     handled by the psymtab code below).  */

  if (code == TYPE_CODE_UNDEF)
    {
      ALL_MSYMBOLS (objfile, msymbol)
	{
	  QUIT;

	  if (completion_skip_symbol (mode, msymbol))
	    continue;

	  completion_list_add_msymbol (tracker, msymbol, lookup_name,
				       sym_text, word);

	  completion_list_objc_symbol (tracker, msymbol, lookup_name,
				       sym_text, word);
	}
    }

  /* Add completions for all currently loaded symbol tables.  */
  ALL_COMPUNITS (objfile, cust)
    add_symtab_completions (cust, tracker, mode, lookup_name,
			    sym_text, word, code);

  /* Look through the partial symtabs for all symbols which begin by
     matching SYM_TEXT.  Expand all CUs that you find to the list.  */
  expand_symtabs_matching (NULL,
			   lookup_name,
			   NULL,
			   [&] (compunit_symtab *symtab) /* expansion notify */
			     {
			       add_symtab_completions (symtab,
						       tracker, mode, lookup_name,
						       sym_text, word, code);
			     },
			   ALL_DOMAIN);

  /* Search upwards from currently selected frame (so that we can
     complete on local vars).  Also catch fields of types defined in
     this places which match our text string.  Only complete on types
     visible from current context.  */

  b = get_selected_block (0);
  surrounding_static_block = block_static_block (b);
  surrounding_global_block = block_global_block (b);
  if (surrounding_static_block != NULL)
    while (b != surrounding_static_block)
      {
	QUIT;

	ALL_BLOCK_SYMBOLS (b, iter, sym)
	  {
	    if (code == TYPE_CODE_UNDEF)
	      {
		completion_list_add_symbol (tracker, sym, lookup_name,
					    sym_text, word);
		completion_list_add_fields (tracker, sym, lookup_name,
					    sym_text, word);
	      }
	    else if (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
		     && TYPE_CODE (SYMBOL_TYPE (sym)) == code)
	      completion_list_add_symbol (tracker, sym, lookup_name,
					  sym_text, word);
	  }

	/* Stop when we encounter an enclosing function.  Do not stop for
	   non-inlined functions - the locals of the enclosing function
	   are in scope for a nested function.  */
	if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
	  break;
	b = BLOCK_SUPERBLOCK (b);
      }

  /* Add fields from the file's types; symbols will be added below.  */

  if (code == TYPE_CODE_UNDEF)
    {
      if (surrounding_static_block != NULL)
	ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym)
	  completion_list_add_fields (tracker, sym, lookup_name,
				      sym_text, word);

      if (surrounding_global_block != NULL)
	ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym)
	  completion_list_add_fields (tracker, sym, lookup_name,
				      sym_text, word);
    }

  /* Skip macros if we are completing a struct tag -- arguable but
     usually what is expected.  */
  if (current_language->la_macro_expansion == macro_expansion_c
      && code == TYPE_CODE_UNDEF)
    {
      gdb::unique_xmalloc_ptr<struct macro_scope> scope;

      /* This adds a macro's name to the current completion list.  */
      auto add_macro_name = [&] (const char *macro_name,
				 const macro_definition *,
				 macro_source_file *,
				 int)
	{
	  completion_list_add_name (tracker, language_c, macro_name,
				    lookup_name, sym_text, word);
	};

      /* Add any macros visible in the default scope.  Note that this
	 may yield the occasional wrong result, because an expression
	 might be evaluated in a scope other than the default.  For
	 example, if the user types "break file:line if <TAB>", the
	 resulting expression will be evaluated at "file:line" -- but
	 at there does not seem to be a way to detect this at
	 completion time.  */
      scope = default_macro_scope ();
      if (scope)
	macro_for_each_in_scope (scope->file, scope->line,
				 add_macro_name);

      /* User-defined macros are always visible.  */
      macro_for_each (macro_user_macros, add_macro_name);
    }
}

void
default_collect_symbol_completion_matches (completion_tracker &tracker,
					   complete_symbol_mode mode,
					   symbol_name_match_type name_match_type,
					   const char *text, const char *word,
					   enum type_code code)
{
  return default_collect_symbol_completion_matches_break_on (tracker, mode,
							     name_match_type,
							     text, word, "",
							     code);
}

/* Collect all symbols (regardless of class) which begin by matching
   TEXT.  */

void
collect_symbol_completion_matches (completion_tracker &tracker,
				   complete_symbol_mode mode,
				   symbol_name_match_type name_match_type,
				   const char *text, const char *word)
{
  current_language->la_collect_symbol_completion_matches (tracker, mode,
							  name_match_type,
							  text, word,
							  TYPE_CODE_UNDEF);
}

/* Like collect_symbol_completion_matches, but only collect
   STRUCT_DOMAIN symbols whose type code is CODE.  */

void
collect_symbol_completion_matches_type (completion_tracker &tracker,
					const char *text, const char *word,
					enum type_code code)
{
  complete_symbol_mode mode = complete_symbol_mode::EXPRESSION;
  symbol_name_match_type name_match_type = symbol_name_match_type::EXPRESSION;

  gdb_assert (code == TYPE_CODE_UNION
	      || code == TYPE_CODE_STRUCT
	      || code == TYPE_CODE_ENUM);
  current_language->la_collect_symbol_completion_matches (tracker, mode,
							  name_match_type,
							  text, word, code);
}

/* Like collect_symbol_completion_matches, but collects a list of
   symbols defined in all source files named SRCFILE.  */

void
collect_file_symbol_completion_matches (completion_tracker &tracker,
					complete_symbol_mode mode,
					symbol_name_match_type name_match_type,
					const char *text, const char *word,
					const char *srcfile)
{
  /* The symbol we are completing on.  Points in same buffer as text.  */
  const char *sym_text;

  /* Now look for the symbol we are supposed to complete on.
     FIXME: This should be language-specific.  */
  if (mode == complete_symbol_mode::LINESPEC)
    sym_text = text;
  else
  {
    const char *p;
    char quote_found;
    const char *quote_pos = NULL;

    /* First see if this is a quoted string.  */
    quote_found = '\0';
    for (p = text; *p != '\0'; ++p)
      {
	if (quote_found != '\0')
	  {
	    if (*p == quote_found)
	      /* Found close quote.  */
	      quote_found = '\0';
	    else if (*p == '\\' && p[1] == quote_found)
	      /* A backslash followed by the quote character
	         doesn't end the string.  */
	      ++p;
	  }
	else if (*p == '\'' || *p == '"')
	  {
	    quote_found = *p;
	    quote_pos = p;
	  }
      }
    if (quote_found == '\'')
      /* A string within single quotes can be a symbol, so complete on it.  */
      sym_text = quote_pos + 1;
    else if (quote_found == '"')
      /* A double-quoted string is never a symbol, nor does it make sense
         to complete it any other way.  */
      {
	return;
      }
    else
      {
	/* Not a quoted string.  */
	sym_text = language_search_unquoted_string (text, p);
      }
  }

  lookup_name_info lookup_name (sym_text, name_match_type, true);

  /* Go through symtabs for SRCFILE and check the externs and statics
     for symbols which match.  */
  iterate_over_symtabs (srcfile, [&] (symtab *s)
    {
      add_symtab_completions (SYMTAB_COMPUNIT (s),
			      tracker, mode, lookup_name,
			      sym_text, word, TYPE_CODE_UNDEF);
      return false;
    });
}

/* A helper function for make_source_files_completion_list.  It adds
   another file name to a list of possible completions, growing the
   list as necessary.  */

static void
add_filename_to_list (const char *fname, const char *text, const char *word,
		      completion_list *list)
{
  list->emplace_back (make_completion_match_str (fname, text, word));
}

static int
not_interesting_fname (const char *fname)
{
  static const char *illegal_aliens[] = {
    "_globals_",	/* inserted by coff_symtab_read */
    NULL
  };
  int i;

  for (i = 0; illegal_aliens[i]; i++)
    {
      if (filename_cmp (fname, illegal_aliens[i]) == 0)
	return 1;
    }
  return 0;
}

/* An object of this type is passed as the user_data argument to
   map_partial_symbol_filenames.  */
struct add_partial_filename_data
{
  struct filename_seen_cache *filename_seen_cache;
  const char *text;
  const char *word;
  int text_len;
  completion_list *list;
};

/* A callback for map_partial_symbol_filenames.  */

static void
maybe_add_partial_symtab_filename (const char *filename, const char *fullname,
				   void *user_data)
{
  struct add_partial_filename_data *data
    = (struct add_partial_filename_data *) user_data;

  if (not_interesting_fname (filename))
    return;
  if (!data->filename_seen_cache->seen (filename)
      && filename_ncmp (filename, data->text, data->text_len) == 0)
    {
      /* This file matches for a completion; add it to the
	 current list of matches.  */
      add_filename_to_list (filename, data->text, data->word, data->list);
    }
  else
    {
      const char *base_name = lbasename (filename);

      if (base_name != filename
	  && !data->filename_seen_cache->seen (base_name)
	  && filename_ncmp (base_name, data->text, data->text_len) == 0)
	add_filename_to_list (base_name, data->text, data->word, data->list);
    }
}

/* Return a list of all source files whose names begin with matching
   TEXT.  The file names are looked up in the symbol tables of this
   program.  */

completion_list
make_source_files_completion_list (const char *text, const char *word)
{
  struct compunit_symtab *cu;
  struct symtab *s;
  struct objfile *objfile;
  size_t text_len = strlen (text);
  completion_list list;
  const char *base_name;
  struct add_partial_filename_data datum;

  if (!have_full_symbols () && !have_partial_symbols ())
    return list;

  filename_seen_cache filenames_seen;

  ALL_FILETABS (objfile, cu, s)
    {
      if (not_interesting_fname (s->filename))
	continue;
      if (!filenames_seen.seen (s->filename)
	  && filename_ncmp (s->filename, text, text_len) == 0)
	{
	  /* This file matches for a completion; add it to the current
	     list of matches.  */
	  add_filename_to_list (s->filename, text, word, &list);
	}
      else
	{
	  /* NOTE: We allow the user to type a base name when the
	     debug info records leading directories, but not the other
	     way around.  This is what subroutines of breakpoint
	     command do when they parse file names.  */
	  base_name = lbasename (s->filename);
	  if (base_name != s->filename
	      && !filenames_seen.seen (base_name)
	      && filename_ncmp (base_name, text, text_len) == 0)
	    add_filename_to_list (base_name, text, word, &list);
	}
    }

  datum.filename_seen_cache = &filenames_seen;
  datum.text = text;
  datum.word = word;
  datum.text_len = text_len;
  datum.list = &list;
  map_symbol_filenames (maybe_add_partial_symtab_filename, &datum,
			0 /*need_fullname*/);

  return list;
}

/* Track MAIN */

/* Return the "main_info" object for the current program space.  If
   the object has not yet been created, create it and fill in some
   default values.  */

static struct main_info *
get_main_info (void)
{
  struct main_info *info
    = (struct main_info *) program_space_data (current_program_space,
					       main_progspace_key);

  if (info == NULL)
    {
      /* It may seem strange to store the main name in the progspace
	 and also in whatever objfile happens to see a main name in
	 its debug info.  The reason for this is mainly historical:
	 gdb returned "main" as the name even if no function named
	 "main" was defined the program; and this approach lets us
	 keep compatibility.  */
      info = XCNEW (struct main_info);
      info->language_of_main = language_unknown;
      set_program_space_data (current_program_space, main_progspace_key,
			      info);
    }

  return info;
}

/* A cleanup to destroy a struct main_info when a progspace is
   destroyed.  */

static void
main_info_cleanup (struct program_space *pspace, void *data)
{
  struct main_info *info = (struct main_info *) data;

  if (info != NULL)
    xfree (info->name_of_main);
  xfree (info);
}

static void
set_main_name (const char *name, enum language lang)
{
  struct main_info *info = get_main_info ();

  if (info->name_of_main != NULL)
    {
      xfree (info->name_of_main);
      info->name_of_main = NULL;
      info->language_of_main = language_unknown;
    }
  if (name != NULL)
    {
      info->name_of_main = xstrdup (name);
      info->language_of_main = lang;
    }
}

/* Deduce the name of the main procedure, and set NAME_OF_MAIN
   accordingly.  */

static void
find_main_name (void)
{
  const char *new_main_name;
  struct objfile *objfile;

  /* First check the objfiles to see whether a debuginfo reader has
     picked up the appropriate main name.  Historically the main name
     was found in a more or less random way; this approach instead
     relies on the order of objfile creation -- which still isn't
     guaranteed to get the correct answer, but is just probably more
     accurate.  */
  ALL_OBJFILES (objfile)
  {
    if (objfile->per_bfd->name_of_main != NULL)
      {
	set_main_name (objfile->per_bfd->name_of_main,
		       objfile->per_bfd->language_of_main);
	return;
      }
  }

  /* Try to see if the main procedure is in Ada.  */
  /* FIXME: brobecker/2005-03-07: Another way of doing this would
     be to add a new method in the language vector, and call this
     method for each language until one of them returns a non-empty
     name.  This would allow us to remove this hard-coded call to
     an Ada function.  It is not clear that this is a better approach
     at this point, because all methods need to be written in a way
     such that false positives never be returned.  For instance, it is
     important that a method does not return a wrong name for the main
     procedure if the main procedure is actually written in a different
     language.  It is easy to guaranty this with Ada, since we use a
     special symbol generated only when the main in Ada to find the name
     of the main procedure.  It is difficult however to see how this can
     be guarantied for languages such as C, for instance.  This suggests
     that order of call for these methods becomes important, which means
     a more complicated approach.  */
  new_main_name = ada_main_name ();
  if (new_main_name != NULL)
    {
      set_main_name (new_main_name, language_ada);
      return;
    }

  new_main_name = d_main_name ();
  if (new_main_name != NULL)
    {
      set_main_name (new_main_name, language_d);
      return;
    }

  new_main_name = go_main_name ();
  if (new_main_name != NULL)
    {
      set_main_name (new_main_name, language_go);
      return;
    }

  new_main_name = pascal_main_name ();
  if (new_main_name != NULL)
    {
      set_main_name (new_main_name, language_pascal);
      return;
    }

  /* The languages above didn't identify the name of the main procedure.
     Fallback to "main".  */
  set_main_name ("main", language_unknown);
}

char *
main_name (void)
{
  struct main_info *info = get_main_info ();

  if (info->name_of_main == NULL)
    find_main_name ();

  return info->name_of_main;
}

/* Return the language of the main function.  If it is not known,
   return language_unknown.  */

enum language
main_language (void)
{
  struct main_info *info = get_main_info ();

  if (info->name_of_main == NULL)
    find_main_name ();

  return info->language_of_main;
}

/* Handle ``executable_changed'' events for the symtab module.  */

static void
symtab_observer_executable_changed (void)
{
  /* NAME_OF_MAIN may no longer be the same, so reset it for now.  */
  set_main_name (NULL, language_unknown);
}

/* Return 1 if the supplied producer string matches the ARM RealView
   compiler (armcc).  */

int
producer_is_realview (const char *producer)
{
  static const char *const arm_idents[] = {
    "ARM C Compiler, ADS",
    "Thumb C Compiler, ADS",
    "ARM C++ Compiler, ADS",
    "Thumb C++ Compiler, ADS",
    "ARM/Thumb C/C++ Compiler, RVCT",
    "ARM C/C++ Compiler, RVCT"
  };
  int i;

  if (producer == NULL)
    return 0;

  for (i = 0; i < ARRAY_SIZE (arm_idents); i++)
    if (startswith (producer, arm_idents[i]))
      return 1;

  return 0;
}



/* The next index to hand out in response to a registration request.  */

static int next_aclass_value = LOC_FINAL_VALUE;

/* The maximum number of "aclass" registrations we support.  This is
   constant for convenience.  */
#define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)

/* The objects representing the various "aclass" values.  The elements
   from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
   elements are those registered at gdb initialization time.  */

static struct symbol_impl symbol_impl[MAX_SYMBOL_IMPLS];

/* The globally visible pointer.  This is separate from 'symbol_impl'
   so that it can be const.  */

const struct symbol_impl *symbol_impls = &symbol_impl[0];

/* Make sure we saved enough room in struct symbol.  */

gdb_static_assert (MAX_SYMBOL_IMPLS <= (1 << SYMBOL_ACLASS_BITS));

/* Register a computed symbol type.  ACLASS must be LOC_COMPUTED.  OPS
   is the ops vector associated with this index.  This returns the new
   index, which should be used as the aclass_index field for symbols
   of this type.  */

int
register_symbol_computed_impl (enum address_class aclass,
			       const struct symbol_computed_ops *ops)
{
  int result = next_aclass_value++;

  gdb_assert (aclass == LOC_COMPUTED);
  gdb_assert (result < MAX_SYMBOL_IMPLS);
  symbol_impl[result].aclass = aclass;
  symbol_impl[result].ops_computed = ops;

  /* Sanity check OPS.  */
  gdb_assert (ops != NULL);
  gdb_assert (ops->tracepoint_var_ref != NULL);
  gdb_assert (ops->describe_location != NULL);
  gdb_assert (ops->get_symbol_read_needs != NULL);
  gdb_assert (ops->read_variable != NULL);

  return result;
}

/* Register a function with frame base type.  ACLASS must be LOC_BLOCK.
   OPS is the ops vector associated with this index.  This returns the
   new index, which should be used as the aclass_index field for symbols
   of this type.  */

int
register_symbol_block_impl (enum address_class aclass,
			    const struct symbol_block_ops *ops)
{
  int result = next_aclass_value++;

  gdb_assert (aclass == LOC_BLOCK);
  gdb_assert (result < MAX_SYMBOL_IMPLS);
  symbol_impl[result].aclass = aclass;
  symbol_impl[result].ops_block = ops;

  /* Sanity check OPS.  */
  gdb_assert (ops != NULL);
  gdb_assert (ops->find_frame_base_location != NULL);

  return result;
}

/* Register a register symbol type.  ACLASS must be LOC_REGISTER or
   LOC_REGPARM_ADDR.  OPS is the register ops vector associated with
   this index.  This returns the new index, which should be used as
   the aclass_index field for symbols of this type.  */

int
register_symbol_register_impl (enum address_class aclass,
			       const struct symbol_register_ops *ops)
{
  int result = next_aclass_value++;

  gdb_assert (aclass == LOC_REGISTER || aclass == LOC_REGPARM_ADDR);
  gdb_assert (result < MAX_SYMBOL_IMPLS);
  symbol_impl[result].aclass = aclass;
  symbol_impl[result].ops_register = ops;

  return result;
}

/* Initialize elements of 'symbol_impl' for the constants in enum
   address_class.  */

static void
initialize_ordinary_address_classes (void)
{
  int i;

  for (i = 0; i < LOC_FINAL_VALUE; ++i)
    symbol_impl[i].aclass = (enum address_class) i;
}



/* Helper function to initialize the fields of an objfile-owned symbol.
   It assumed that *SYM is already all zeroes.  */

static void
initialize_objfile_symbol_1 (struct symbol *sym)
{
  SYMBOL_OBJFILE_OWNED (sym) = 1;
  SYMBOL_SECTION (sym) = -1;
}

/* Initialize the symbol SYM, and mark it as being owned by an objfile.  */

void
initialize_objfile_symbol (struct symbol *sym)
{
  memset (sym, 0, sizeof (*sym));
  initialize_objfile_symbol_1 (sym);
}

/* Allocate and initialize a new 'struct symbol' on OBJFILE's
   obstack.  */

struct symbol *
allocate_symbol (struct objfile *objfile)
{
  struct symbol *result;

  result = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
  initialize_objfile_symbol_1 (result);

  return result;
}

/* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
   obstack.  */

struct template_symbol *
allocate_template_symbol (struct objfile *objfile)
{
  struct template_symbol *result;

  result = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct template_symbol);
  initialize_objfile_symbol_1 (result);

  return result;
}

/* See symtab.h.  */

struct objfile *
symbol_objfile (const struct symbol *symbol)
{
  gdb_assert (SYMBOL_OBJFILE_OWNED (symbol));
  return SYMTAB_OBJFILE (symbol->owner.symtab);
}

/* See symtab.h.  */

struct gdbarch *
symbol_arch (const struct symbol *symbol)
{
  if (!SYMBOL_OBJFILE_OWNED (symbol))
    return symbol->owner.arch;
  return get_objfile_arch (SYMTAB_OBJFILE (symbol->owner.symtab));
}

/* See symtab.h.  */

struct symtab *
symbol_symtab (const struct symbol *symbol)
{
  gdb_assert (SYMBOL_OBJFILE_OWNED (symbol));
  return symbol->owner.symtab;
}

/* See symtab.h.  */

void
symbol_set_symtab (struct symbol *symbol, struct symtab *symtab)
{
  gdb_assert (SYMBOL_OBJFILE_OWNED (symbol));
  symbol->owner.symtab = symtab;
}



void
_initialize_symtab (void)
{
  initialize_ordinary_address_classes ();

  main_progspace_key
    = register_program_space_data_with_cleanup (NULL, main_info_cleanup);

  symbol_cache_key
    = register_program_space_data_with_cleanup (NULL, symbol_cache_cleanup);

  add_info ("variables", info_variables_command,
	    info_print_args_help (_("\
All global and static variable names or those matching REGEXPs.\n\
Usage: info variables [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
Prints the global and static variables.\n"),
				  _("global and static variables")));
  if (dbx_commands)
    add_com ("whereis", class_info, info_variables_command,
	     info_print_args_help (_("\
All global and static variable names, or those matching REGEXPs.\n\
Usage: whereis [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
Prints the global and static variables.\n"),
				   _("global and static variables")));

  add_info ("functions", info_functions_command,
	    info_print_args_help (_("\
All function names or those matching REGEXPs.\n\
Usage: info functions [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
Prints the functions.\n"),
				  _("functions")));

  /* FIXME:  This command has at least the following problems:
     1.  It prints builtin types (in a very strange and confusing fashion).
     2.  It doesn't print right, e.g. with
     typedef struct foo *FOO
     type_print prints "FOO" when we want to make it (in this situation)
     print "struct foo *".
     I also think "ptype" or "whatis" is more likely to be useful (but if
     there is much disagreement "info types" can be fixed).  */
  add_info ("types", info_types_command,
	    _("All type names, or those matching REGEXP."));

  add_info ("sources", info_sources_command,
	    _("Source files in the program."));

  add_com ("rbreak", class_breakpoint, rbreak_command,
	   _("Set a breakpoint for all functions matching REGEXP."));

  add_setshow_enum_cmd ("multiple-symbols", no_class,
                        multiple_symbols_modes, &multiple_symbols_mode,
                        _("\
Set the debugger behavior when more than one symbol are possible matches\n\
in an expression."), _("\
Show how the debugger handles ambiguities in expressions."), _("\
Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
                        NULL, NULL, &setlist, &showlist);

  add_setshow_boolean_cmd ("basenames-may-differ", class_obscure,
			   &basenames_may_differ, _("\
Set whether a source file may have multiple base names."), _("\
Show whether a source file may have multiple base names."), _("\
(A \"base name\" is the name of a file with the directory part removed.\n\
Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
before comparing them.  Canonicalization is an expensive operation,\n\
but it allows the same file be known by more than one base name.\n\
If not set (the default), all source files are assumed to have just\n\
one base name, and gdb will do file name comparisons more efficiently."),
			   NULL, NULL,
			   &setlist, &showlist);

  add_setshow_zuinteger_cmd ("symtab-create", no_class, &symtab_create_debug,
			     _("Set debugging of symbol table creation."),
			     _("Show debugging of symbol table creation."), _("\
When enabled (non-zero), debugging messages are printed when building\n\
symbol tables.  A value of 1 (one) normally provides enough information.\n\
A value greater than 1 provides more verbose information."),
			     NULL,
			     NULL,
			     &setdebuglist, &showdebuglist);

  add_setshow_zuinteger_cmd ("symbol-lookup", no_class, &symbol_lookup_debug,
			   _("\
Set debugging of symbol lookup."), _("\
Show debugging of symbol lookup."), _("\
When enabled (non-zero), symbol lookups are logged."),
			   NULL, NULL,
			   &setdebuglist, &showdebuglist);

  add_setshow_zuinteger_cmd ("symbol-cache-size", no_class,
			     &new_symbol_cache_size,
			     _("Set the size of the symbol cache."),
			     _("Show the size of the symbol cache."), _("\
The size of the symbol cache.\n\
If zero then the symbol cache is disabled."),
			     set_symbol_cache_size_handler, NULL,
			     &maintenance_set_cmdlist,
			     &maintenance_show_cmdlist);

  add_cmd ("symbol-cache", class_maintenance, maintenance_print_symbol_cache,
	   _("Dump the symbol cache for each program space."),
	   &maintenanceprintlist);

  add_cmd ("symbol-cache-statistics", class_maintenance,
	   maintenance_print_symbol_cache_statistics,
	   _("Print symbol cache statistics for each program space."),
	   &maintenanceprintlist);

  add_cmd ("flush-symbol-cache", class_maintenance,
	   maintenance_flush_symbol_cache,
	   _("Flush the symbol cache for each program space."),
	   &maintenancelist);

  gdb::observers::executable_changed.attach (symtab_observer_executable_changed);
  gdb::observers::new_objfile.attach (symtab_new_objfile_observer);
  gdb::observers::free_objfile.attach (symtab_free_objfile_observer);
}