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
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
|
//===-- Process.cpp -------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <atomic>
#include <memory>
#include <mutex>
#include <optional>
#include "llvm/ADT/ScopeExit.h"
#include "llvm/Support/ScopedPrinter.h"
#include "llvm/Support/Threading.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Breakpoint/StoppointCallbackContext.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Expression/DiagnosticManager.h"
#include "lldb/Expression/DynamicCheckerFunctions.h"
#include "lldb/Expression/UserExpression.h"
#include "lldb/Expression/UtilityFunction.h"
#include "lldb/Host/ConnectionFileDescriptor.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Host/OptionParser.h"
#include "lldb/Host/Pipe.h"
#include "lldb/Host/Terminal.h"
#include "lldb/Host/ThreadLauncher.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/OptionArgParser.h"
#include "lldb/Interpreter/OptionValueProperties.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Target/ABI.h"
#include "lldb/Target/AssertFrameRecognizer.h"
#include "lldb/Target/DynamicLoader.h"
#include "lldb/Target/InstrumentationRuntime.h"
#include "lldb/Target/JITLoader.h"
#include "lldb/Target/JITLoaderList.h"
#include "lldb/Target/Language.h"
#include "lldb/Target/LanguageRuntime.h"
#include "lldb/Target/MemoryHistory.h"
#include "lldb/Target/MemoryRegionInfo.h"
#include "lldb/Target/OperatingSystem.h"
#include "lldb/Target/Platform.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StopInfo.h"
#include "lldb/Target/StructuredDataPlugin.h"
#include "lldb/Target/SystemRuntime.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/TargetList.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadPlan.h"
#include "lldb/Target/ThreadPlanBase.h"
#include "lldb/Target/ThreadPlanCallFunction.h"
#include "lldb/Target/ThreadPlanStack.h"
#include "lldb/Target/UnixSignals.h"
#include "lldb/Utility/Event.h"
#include "lldb/Utility/LLDBLog.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/NameMatches.h"
#include "lldb/Utility/ProcessInfo.h"
#include "lldb/Utility/SelectHelper.h"
#include "lldb/Utility/State.h"
#include "lldb/Utility/Timer.h"
using namespace lldb;
using namespace lldb_private;
using namespace std::chrono;
// Comment out line below to disable memory caching, overriding the process
// setting target.process.disable-memory-cache
#define ENABLE_MEMORY_CACHING
#ifdef ENABLE_MEMORY_CACHING
#define DISABLE_MEM_CACHE_DEFAULT false
#else
#define DISABLE_MEM_CACHE_DEFAULT true
#endif
class ProcessOptionValueProperties
: public Cloneable<ProcessOptionValueProperties, OptionValueProperties> {
public:
ProcessOptionValueProperties(llvm::StringRef name) : Cloneable(name) {}
const Property *
GetPropertyAtIndex(size_t idx,
const ExecutionContext *exe_ctx) const override {
// When getting the value for a key from the process options, we will
// always try and grab the setting from the current process if there is
// one. Else we just use the one from this instance.
if (exe_ctx) {
Process *process = exe_ctx->GetProcessPtr();
if (process) {
ProcessOptionValueProperties *instance_properties =
static_cast<ProcessOptionValueProperties *>(
process->GetValueProperties().get());
if (this != instance_properties)
return instance_properties->ProtectedGetPropertyAtIndex(idx);
}
}
return ProtectedGetPropertyAtIndex(idx);
}
};
static constexpr OptionEnumValueElement g_follow_fork_mode_values[] = {
{
eFollowParent,
"parent",
"Continue tracing the parent process and detach the child.",
},
{
eFollowChild,
"child",
"Trace the child process and detach the parent.",
},
};
#define LLDB_PROPERTIES_process
#include "TargetProperties.inc"
enum {
#define LLDB_PROPERTIES_process
#include "TargetPropertiesEnum.inc"
ePropertyExperimental,
};
#define LLDB_PROPERTIES_process_experimental
#include "TargetProperties.inc"
enum {
#define LLDB_PROPERTIES_process_experimental
#include "TargetPropertiesEnum.inc"
};
class ProcessExperimentalOptionValueProperties
: public Cloneable<ProcessExperimentalOptionValueProperties,
OptionValueProperties> {
public:
ProcessExperimentalOptionValueProperties()
: Cloneable(Properties::GetExperimentalSettingsName()) {}
};
ProcessExperimentalProperties::ProcessExperimentalProperties()
: Properties(OptionValuePropertiesSP(
new ProcessExperimentalOptionValueProperties())) {
m_collection_sp->Initialize(g_process_experimental_properties);
}
ProcessProperties::ProcessProperties(lldb_private::Process *process)
: Properties(),
m_process(process) // Can be nullptr for global ProcessProperties
{
if (process == nullptr) {
// Global process properties, set them up one time
m_collection_sp = std::make_shared<ProcessOptionValueProperties>("process");
m_collection_sp->Initialize(g_process_properties);
m_collection_sp->AppendProperty(
"thread", "Settings specific to threads.", true,
Thread::GetGlobalProperties().GetValueProperties());
} else {
m_collection_sp =
OptionValueProperties::CreateLocalCopy(Process::GetGlobalProperties());
m_collection_sp->SetValueChangedCallback(
ePropertyPythonOSPluginPath,
[this] { m_process->LoadOperatingSystemPlugin(true); });
}
m_experimental_properties_up =
std::make_unique<ProcessExperimentalProperties>();
m_collection_sp->AppendProperty(
Properties::GetExperimentalSettingsName(),
"Experimental settings - setting these won't produce "
"errors if the setting is not present.",
true, m_experimental_properties_up->GetValueProperties());
}
ProcessProperties::~ProcessProperties() = default;
bool ProcessProperties::GetDisableMemoryCache() const {
const uint32_t idx = ePropertyDisableMemCache;
return GetPropertyAtIndexAs<bool>(
idx, g_process_properties[idx].default_uint_value != 0);
}
uint64_t ProcessProperties::GetMemoryCacheLineSize() const {
const uint32_t idx = ePropertyMemCacheLineSize;
return GetPropertyAtIndexAs<uint64_t>(
idx, g_process_properties[idx].default_uint_value);
}
Args ProcessProperties::GetExtraStartupCommands() const {
Args args;
const uint32_t idx = ePropertyExtraStartCommand;
m_collection_sp->GetPropertyAtIndexAsArgs(idx, args);
return args;
}
void ProcessProperties::SetExtraStartupCommands(const Args &args) {
const uint32_t idx = ePropertyExtraStartCommand;
m_collection_sp->SetPropertyAtIndexFromArgs(idx, args);
}
FileSpec ProcessProperties::GetPythonOSPluginPath() const {
const uint32_t idx = ePropertyPythonOSPluginPath;
return GetPropertyAtIndexAs<FileSpec>(idx, {});
}
uint32_t ProcessProperties::GetVirtualAddressableBits() const {
const uint32_t idx = ePropertyVirtualAddressableBits;
return GetPropertyAtIndexAs<uint64_t>(
idx, g_process_properties[idx].default_uint_value);
}
void ProcessProperties::SetVirtualAddressableBits(uint32_t bits) {
const uint32_t idx = ePropertyVirtualAddressableBits;
SetPropertyAtIndex(idx, static_cast<uint64_t>(bits));
}
uint32_t ProcessProperties::GetHighmemVirtualAddressableBits() const {
const uint32_t idx = ePropertyHighmemVirtualAddressableBits;
return GetPropertyAtIndexAs<uint64_t>(
idx, g_process_properties[idx].default_uint_value);
}
void ProcessProperties::SetHighmemVirtualAddressableBits(uint32_t bits) {
const uint32_t idx = ePropertyHighmemVirtualAddressableBits;
SetPropertyAtIndex(idx, static_cast<uint64_t>(bits));
}
void ProcessProperties::SetPythonOSPluginPath(const FileSpec &file) {
const uint32_t idx = ePropertyPythonOSPluginPath;
SetPropertyAtIndex(idx, file);
}
bool ProcessProperties::GetIgnoreBreakpointsInExpressions() const {
const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions;
return GetPropertyAtIndexAs<bool>(
idx, g_process_properties[idx].default_uint_value != 0);
}
void ProcessProperties::SetIgnoreBreakpointsInExpressions(bool ignore) {
const uint32_t idx = ePropertyIgnoreBreakpointsInExpressions;
SetPropertyAtIndex(idx, ignore);
}
bool ProcessProperties::GetUnwindOnErrorInExpressions() const {
const uint32_t idx = ePropertyUnwindOnErrorInExpressions;
return GetPropertyAtIndexAs<bool>(
idx, g_process_properties[idx].default_uint_value != 0);
}
void ProcessProperties::SetUnwindOnErrorInExpressions(bool ignore) {
const uint32_t idx = ePropertyUnwindOnErrorInExpressions;
SetPropertyAtIndex(idx, ignore);
}
bool ProcessProperties::GetStopOnSharedLibraryEvents() const {
const uint32_t idx = ePropertyStopOnSharedLibraryEvents;
return GetPropertyAtIndexAs<bool>(
idx, g_process_properties[idx].default_uint_value != 0);
}
void ProcessProperties::SetStopOnSharedLibraryEvents(bool stop) {
const uint32_t idx = ePropertyStopOnSharedLibraryEvents;
SetPropertyAtIndex(idx, stop);
}
bool ProcessProperties::GetDisableLangRuntimeUnwindPlans() const {
const uint32_t idx = ePropertyDisableLangRuntimeUnwindPlans;
return GetPropertyAtIndexAs<bool>(
idx, g_process_properties[idx].default_uint_value != 0);
}
void ProcessProperties::SetDisableLangRuntimeUnwindPlans(bool disable) {
const uint32_t idx = ePropertyDisableLangRuntimeUnwindPlans;
SetPropertyAtIndex(idx, disable);
m_process->Flush();
}
bool ProcessProperties::GetDetachKeepsStopped() const {
const uint32_t idx = ePropertyDetachKeepsStopped;
return GetPropertyAtIndexAs<bool>(
idx, g_process_properties[idx].default_uint_value != 0);
}
void ProcessProperties::SetDetachKeepsStopped(bool stop) {
const uint32_t idx = ePropertyDetachKeepsStopped;
SetPropertyAtIndex(idx, stop);
}
bool ProcessProperties::GetWarningsOptimization() const {
const uint32_t idx = ePropertyWarningOptimization;
return GetPropertyAtIndexAs<bool>(
idx, g_process_properties[idx].default_uint_value != 0);
}
bool ProcessProperties::GetWarningsUnsupportedLanguage() const {
const uint32_t idx = ePropertyWarningUnsupportedLanguage;
return GetPropertyAtIndexAs<bool>(
idx, g_process_properties[idx].default_uint_value != 0);
}
bool ProcessProperties::GetStopOnExec() const {
const uint32_t idx = ePropertyStopOnExec;
return GetPropertyAtIndexAs<bool>(
idx, g_process_properties[idx].default_uint_value != 0);
}
std::chrono::seconds ProcessProperties::GetUtilityExpressionTimeout() const {
const uint32_t idx = ePropertyUtilityExpressionTimeout;
uint64_t value = GetPropertyAtIndexAs<uint64_t>(
idx, g_process_properties[idx].default_uint_value);
return std::chrono::seconds(value);
}
std::chrono::seconds ProcessProperties::GetInterruptTimeout() const {
const uint32_t idx = ePropertyInterruptTimeout;
uint64_t value = GetPropertyAtIndexAs<uint64_t>(
idx, g_process_properties[idx].default_uint_value);
return std::chrono::seconds(value);
}
bool ProcessProperties::GetSteppingRunsAllThreads() const {
const uint32_t idx = ePropertySteppingRunsAllThreads;
return GetPropertyAtIndexAs<bool>(
idx, g_process_properties[idx].default_uint_value != 0);
}
bool ProcessProperties::GetOSPluginReportsAllThreads() const {
const bool fail_value = true;
const Property *exp_property =
m_collection_sp->GetPropertyAtIndex(ePropertyExperimental);
OptionValueProperties *exp_values =
exp_property->GetValue()->GetAsProperties();
if (!exp_values)
return fail_value;
return exp_values
->GetPropertyAtIndexAs<bool>(ePropertyOSPluginReportsAllThreads)
.value_or(fail_value);
}
void ProcessProperties::SetOSPluginReportsAllThreads(bool does_report) {
const Property *exp_property =
m_collection_sp->GetPropertyAtIndex(ePropertyExperimental);
OptionValueProperties *exp_values =
exp_property->GetValue()->GetAsProperties();
if (exp_values)
exp_values->SetPropertyAtIndex(ePropertyOSPluginReportsAllThreads,
does_report);
}
FollowForkMode ProcessProperties::GetFollowForkMode() const {
const uint32_t idx = ePropertyFollowForkMode;
return GetPropertyAtIndexAs<FollowForkMode>(
idx, static_cast<FollowForkMode>(
g_process_properties[idx].default_uint_value));
}
ProcessSP Process::FindPlugin(lldb::TargetSP target_sp,
llvm::StringRef plugin_name,
ListenerSP listener_sp,
const FileSpec *crash_file_path,
bool can_connect) {
static uint32_t g_process_unique_id = 0;
ProcessSP process_sp;
ProcessCreateInstance create_callback = nullptr;
if (!plugin_name.empty()) {
create_callback =
PluginManager::GetProcessCreateCallbackForPluginName(plugin_name);
if (create_callback) {
process_sp = create_callback(target_sp, listener_sp, crash_file_path,
can_connect);
if (process_sp) {
if (process_sp->CanDebug(target_sp, true)) {
process_sp->m_process_unique_id = ++g_process_unique_id;
} else
process_sp.reset();
}
}
} else {
for (uint32_t idx = 0;
(create_callback =
PluginManager::GetProcessCreateCallbackAtIndex(idx)) != nullptr;
++idx) {
process_sp = create_callback(target_sp, listener_sp, crash_file_path,
can_connect);
if (process_sp) {
if (process_sp->CanDebug(target_sp, false)) {
process_sp->m_process_unique_id = ++g_process_unique_id;
break;
} else
process_sp.reset();
}
}
}
return process_sp;
}
ConstString &Process::GetStaticBroadcasterClass() {
static ConstString class_name("lldb.process");
return class_name;
}
Process::Process(lldb::TargetSP target_sp, ListenerSP listener_sp)
: Process(target_sp, listener_sp, UnixSignals::CreateForHost()) {
// This constructor just delegates to the full Process constructor,
// defaulting to using the Host's UnixSignals.
}
Process::Process(lldb::TargetSP target_sp, ListenerSP listener_sp,
const UnixSignalsSP &unix_signals_sp)
: ProcessProperties(this),
Broadcaster((target_sp->GetDebugger().GetBroadcasterManager()),
Process::GetStaticBroadcasterClass().AsCString()),
m_target_wp(target_sp), m_public_state(eStateUnloaded),
m_private_state(eStateUnloaded),
m_private_state_broadcaster(nullptr,
"lldb.process.internal_state_broadcaster"),
m_private_state_control_broadcaster(
nullptr, "lldb.process.internal_state_control_broadcaster"),
m_private_state_listener_sp(
Listener::MakeListener("lldb.process.internal_state_listener")),
m_mod_id(), m_process_unique_id(0), m_thread_index_id(0),
m_thread_id_to_index_id_map(), m_exit_status(-1), m_exit_string(),
m_exit_status_mutex(), m_thread_mutex(), m_thread_list_real(this),
m_thread_list(this), m_thread_plans(*this), m_extended_thread_list(this),
m_extended_thread_stop_id(0), m_queue_list(this), m_queue_list_stop_id(0),
m_watchpoint_resource_list(), m_notifications(), m_image_tokens(),
m_breakpoint_site_list(), m_dynamic_checkers_up(),
m_unix_signals_sp(unix_signals_sp), m_abi_sp(), m_process_input_reader(),
m_stdio_communication("process.stdio"), m_stdio_communication_mutex(),
m_stdin_forward(false), m_stdout_data(), m_stderr_data(),
m_profile_data_comm_mutex(), m_profile_data(), m_iohandler_sync(0),
m_memory_cache(*this), m_allocated_memory_cache(*this),
m_should_detach(false), m_next_event_action_up(), m_public_run_lock(),
m_private_run_lock(), m_currently_handling_do_on_removals(false),
m_resume_requested(false), m_finalizing(false), m_destructing(false),
m_clear_thread_plans_on_stop(false), m_force_next_event_delivery(false),
m_last_broadcast_state(eStateInvalid), m_destroy_in_process(false),
m_can_interpret_function_calls(false), m_run_thread_plan_lock(),
m_can_jit(eCanJITDontKnow) {
CheckInWithManager();
Log *log = GetLog(LLDBLog::Object);
LLDB_LOGF(log, "%p Process::Process()", static_cast<void *>(this));
if (!m_unix_signals_sp)
m_unix_signals_sp = std::make_shared<UnixSignals>();
SetEventName(eBroadcastBitStateChanged, "state-changed");
SetEventName(eBroadcastBitInterrupt, "interrupt");
SetEventName(eBroadcastBitSTDOUT, "stdout-available");
SetEventName(eBroadcastBitSTDERR, "stderr-available");
SetEventName(eBroadcastBitProfileData, "profile-data-available");
SetEventName(eBroadcastBitStructuredData, "structured-data-available");
m_private_state_control_broadcaster.SetEventName(
eBroadcastInternalStateControlStop, "control-stop");
m_private_state_control_broadcaster.SetEventName(
eBroadcastInternalStateControlPause, "control-pause");
m_private_state_control_broadcaster.SetEventName(
eBroadcastInternalStateControlResume, "control-resume");
// The listener passed into process creation is the primary listener:
// It always listens for all the event bits for Process:
SetPrimaryListener(listener_sp);
m_private_state_listener_sp->StartListeningForEvents(
&m_private_state_broadcaster,
eBroadcastBitStateChanged | eBroadcastBitInterrupt);
m_private_state_listener_sp->StartListeningForEvents(
&m_private_state_control_broadcaster,
eBroadcastInternalStateControlStop | eBroadcastInternalStateControlPause |
eBroadcastInternalStateControlResume);
// We need something valid here, even if just the default UnixSignalsSP.
assert(m_unix_signals_sp && "null m_unix_signals_sp after initialization");
// Allow the platform to override the default cache line size
OptionValueSP value_sp =
m_collection_sp->GetPropertyAtIndex(ePropertyMemCacheLineSize)
->GetValue();
uint64_t platform_cache_line_size =
target_sp->GetPlatform()->GetDefaultMemoryCacheLineSize();
if (!value_sp->OptionWasSet() && platform_cache_line_size != 0)
value_sp->SetValueAs(platform_cache_line_size);
RegisterAssertFrameRecognizer(this);
}
Process::~Process() {
Log *log = GetLog(LLDBLog::Object);
LLDB_LOGF(log, "%p Process::~Process()", static_cast<void *>(this));
StopPrivateStateThread();
// ThreadList::Clear() will try to acquire this process's mutex, so
// explicitly clear the thread list here to ensure that the mutex is not
// destroyed before the thread list.
m_thread_list.Clear();
}
ProcessProperties &Process::GetGlobalProperties() {
// NOTE: intentional leak so we don't crash if global destructor chain gets
// called as other threads still use the result of this function
static ProcessProperties *g_settings_ptr =
new ProcessProperties(nullptr);
return *g_settings_ptr;
}
void Process::Finalize(bool destructing) {
if (m_finalizing.exchange(true))
return;
if (destructing)
m_destructing.exchange(true);
// Destroy the process. This will call the virtual function DoDestroy under
// the hood, giving our derived class a chance to do the ncessary tear down.
DestroyImpl(false);
// Clear our broadcaster before we proceed with destroying
Broadcaster::Clear();
// Do any cleanup needed prior to being destructed... Subclasses that
// override this method should call this superclass method as well.
// We need to destroy the loader before the derived Process class gets
// destroyed since it is very likely that undoing the loader will require
// access to the real process.
m_dynamic_checkers_up.reset();
m_abi_sp.reset();
m_os_up.reset();
m_system_runtime_up.reset();
m_dyld_up.reset();
m_jit_loaders_up.reset();
m_thread_plans.Clear();
m_thread_list_real.Destroy();
m_thread_list.Destroy();
m_extended_thread_list.Destroy();
m_queue_list.Clear();
m_queue_list_stop_id = 0;
m_watchpoint_resource_list.Clear();
std::vector<Notifications> empty_notifications;
m_notifications.swap(empty_notifications);
m_image_tokens.clear();
m_memory_cache.Clear();
m_allocated_memory_cache.Clear(/*deallocate_memory=*/true);
{
std::lock_guard<std::recursive_mutex> guard(m_language_runtimes_mutex);
m_language_runtimes.clear();
}
m_instrumentation_runtimes.clear();
m_next_event_action_up.reset();
// Clear the last natural stop ID since it has a strong reference to this
// process
m_mod_id.SetStopEventForLastNaturalStopID(EventSP());
// We have to be very careful here as the m_private_state_listener might
// contain events that have ProcessSP values in them which can keep this
// process around forever. These events need to be cleared out.
m_private_state_listener_sp->Clear();
m_public_run_lock.TrySetRunning(); // This will do nothing if already locked
m_public_run_lock.SetStopped();
m_private_run_lock.TrySetRunning(); // This will do nothing if already locked
m_private_run_lock.SetStopped();
m_structured_data_plugin_map.clear();
}
void Process::RegisterNotificationCallbacks(const Notifications &callbacks) {
m_notifications.push_back(callbacks);
if (callbacks.initialize != nullptr)
callbacks.initialize(callbacks.baton, this);
}
bool Process::UnregisterNotificationCallbacks(const Notifications &callbacks) {
std::vector<Notifications>::iterator pos, end = m_notifications.end();
for (pos = m_notifications.begin(); pos != end; ++pos) {
if (pos->baton == callbacks.baton &&
pos->initialize == callbacks.initialize &&
pos->process_state_changed == callbacks.process_state_changed) {
m_notifications.erase(pos);
return true;
}
}
return false;
}
void Process::SynchronouslyNotifyStateChanged(StateType state) {
std::vector<Notifications>::iterator notification_pos,
notification_end = m_notifications.end();
for (notification_pos = m_notifications.begin();
notification_pos != notification_end; ++notification_pos) {
if (notification_pos->process_state_changed)
notification_pos->process_state_changed(notification_pos->baton, this,
state);
}
}
// FIXME: We need to do some work on events before the general Listener sees
// them.
// For instance if we are continuing from a breakpoint, we need to ensure that
// we do the little "insert real insn, step & stop" trick. But we can't do
// that when the event is delivered by the broadcaster - since that is done on
// the thread that is waiting for new events, so if we needed more than one
// event for our handling, we would stall. So instead we do it when we fetch
// the event off of the queue.
//
StateType Process::GetNextEvent(EventSP &event_sp) {
StateType state = eStateInvalid;
if (GetPrimaryListener()->GetEventForBroadcaster(this, event_sp,
std::chrono::seconds(0)) &&
event_sp)
state = Process::ProcessEventData::GetStateFromEvent(event_sp.get());
return state;
}
void Process::SyncIOHandler(uint32_t iohandler_id,
const Timeout<std::micro> &timeout) {
// don't sync (potentially context switch) in case where there is no process
// IO
if (!ProcessIOHandlerExists())
return;
auto Result = m_iohandler_sync.WaitForValueNotEqualTo(iohandler_id, timeout);
Log *log = GetLog(LLDBLog::Process);
if (Result) {
LLDB_LOG(
log,
"waited from m_iohandler_sync to change from {0}. New value is {1}.",
iohandler_id, *Result);
} else {
LLDB_LOG(log, "timed out waiting for m_iohandler_sync to change from {0}.",
iohandler_id);
}
}
StateType Process::WaitForProcessToStop(
const Timeout<std::micro> &timeout, EventSP *event_sp_ptr, bool wait_always,
ListenerSP hijack_listener_sp, Stream *stream, bool use_run_lock,
SelectMostRelevant select_most_relevant) {
// We can't just wait for a "stopped" event, because the stopped event may
// have restarted the target. We have to actually check each event, and in
// the case of a stopped event check the restarted flag on the event.
if (event_sp_ptr)
event_sp_ptr->reset();
StateType state = GetState();
// If we are exited or detached, we won't ever get back to any other valid
// state...
if (state == eStateDetached || state == eStateExited)
return state;
Log *log = GetLog(LLDBLog::Process);
LLDB_LOG(log, "timeout = {0}", timeout);
if (!wait_always && StateIsStoppedState(state, true) &&
StateIsStoppedState(GetPrivateState(), true)) {
LLDB_LOGF(log,
"Process::%s returning without waiting for events; process "
"private and public states are already 'stopped'.",
__FUNCTION__);
// We need to toggle the run lock as this won't get done in
// SetPublicState() if the process is hijacked.
if (hijack_listener_sp && use_run_lock)
m_public_run_lock.SetStopped();
return state;
}
while (state != eStateInvalid) {
EventSP event_sp;
state = GetStateChangedEvents(event_sp, timeout, hijack_listener_sp);
if (event_sp_ptr && event_sp)
*event_sp_ptr = event_sp;
bool pop_process_io_handler = (hijack_listener_sp.get() != nullptr);
Process::HandleProcessStateChangedEvent(
event_sp, stream, select_most_relevant, pop_process_io_handler);
switch (state) {
case eStateCrashed:
case eStateDetached:
case eStateExited:
case eStateUnloaded:
// We need to toggle the run lock as this won't get done in
// SetPublicState() if the process is hijacked.
if (hijack_listener_sp && use_run_lock)
m_public_run_lock.SetStopped();
return state;
case eStateStopped:
if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get()))
continue;
else {
// We need to toggle the run lock as this won't get done in
// SetPublicState() if the process is hijacked.
if (hijack_listener_sp && use_run_lock)
m_public_run_lock.SetStopped();
return state;
}
default:
continue;
}
}
return state;
}
bool Process::HandleProcessStateChangedEvent(
const EventSP &event_sp, Stream *stream,
SelectMostRelevant select_most_relevant,
bool &pop_process_io_handler) {
const bool handle_pop = pop_process_io_handler;
pop_process_io_handler = false;
ProcessSP process_sp =
Process::ProcessEventData::GetProcessFromEvent(event_sp.get());
if (!process_sp)
return false;
StateType event_state =
Process::ProcessEventData::GetStateFromEvent(event_sp.get());
if (event_state == eStateInvalid)
return false;
switch (event_state) {
case eStateInvalid:
case eStateUnloaded:
case eStateAttaching:
case eStateLaunching:
case eStateStepping:
case eStateDetached:
if (stream)
stream->Printf("Process %" PRIu64 " %s\n", process_sp->GetID(),
StateAsCString(event_state));
if (event_state == eStateDetached)
pop_process_io_handler = true;
break;
case eStateConnected:
case eStateRunning:
// Don't be chatty when we run...
break;
case eStateExited:
if (stream)
process_sp->GetStatus(*stream);
pop_process_io_handler = true;
break;
case eStateStopped:
case eStateCrashed:
case eStateSuspended:
// Make sure the program hasn't been auto-restarted:
if (Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) {
if (stream) {
size_t num_reasons =
Process::ProcessEventData::GetNumRestartedReasons(event_sp.get());
if (num_reasons > 0) {
// FIXME: Do we want to report this, or would that just be annoyingly
// chatty?
if (num_reasons == 1) {
const char *reason =
Process::ProcessEventData::GetRestartedReasonAtIndex(
event_sp.get(), 0);
stream->Printf("Process %" PRIu64 " stopped and restarted: %s\n",
process_sp->GetID(),
reason ? reason : "<UNKNOWN REASON>");
} else {
stream->Printf("Process %" PRIu64
" stopped and restarted, reasons:\n",
process_sp->GetID());
for (size_t i = 0; i < num_reasons; i++) {
const char *reason =
Process::ProcessEventData::GetRestartedReasonAtIndex(
event_sp.get(), i);
stream->Printf("\t%s\n", reason ? reason : "<UNKNOWN REASON>");
}
}
}
}
} else {
StopInfoSP curr_thread_stop_info_sp;
// Lock the thread list so it doesn't change on us, this is the scope for
// the locker:
{
ThreadList &thread_list = process_sp->GetThreadList();
std::lock_guard<std::recursive_mutex> guard(thread_list.GetMutex());
ThreadSP curr_thread(thread_list.GetSelectedThread());
ThreadSP thread;
StopReason curr_thread_stop_reason = eStopReasonInvalid;
bool prefer_curr_thread = false;
if (curr_thread && curr_thread->IsValid()) {
curr_thread_stop_reason = curr_thread->GetStopReason();
switch (curr_thread_stop_reason) {
case eStopReasonNone:
case eStopReasonInvalid:
// Don't prefer the current thread if it didn't stop for a reason.
break;
case eStopReasonSignal: {
// We need to do the same computation we do for other threads
// below in case the current thread happens to be the one that
// stopped for the no-stop signal.
uint64_t signo = curr_thread->GetStopInfo()->GetValue();
if (process_sp->GetUnixSignals()->GetShouldStop(signo))
prefer_curr_thread = true;
} break;
default:
prefer_curr_thread = true;
break;
}
curr_thread_stop_info_sp = curr_thread->GetStopInfo();
}
if (!prefer_curr_thread) {
// Prefer a thread that has just completed its plan over another
// thread as current thread.
ThreadSP plan_thread;
ThreadSP other_thread;
const size_t num_threads = thread_list.GetSize();
size_t i;
for (i = 0; i < num_threads; ++i) {
thread = thread_list.GetThreadAtIndex(i);
StopReason thread_stop_reason = thread->GetStopReason();
switch (thread_stop_reason) {
case eStopReasonInvalid:
case eStopReasonNone:
break;
case eStopReasonSignal: {
// Don't select a signal thread if we weren't going to stop at
// that signal. We have to have had another reason for stopping
// here, and the user doesn't want to see this thread.
uint64_t signo = thread->GetStopInfo()->GetValue();
if (process_sp->GetUnixSignals()->GetShouldStop(signo)) {
if (!other_thread)
other_thread = thread;
}
break;
}
case eStopReasonTrace:
case eStopReasonBreakpoint:
case eStopReasonWatchpoint:
case eStopReasonException:
case eStopReasonExec:
case eStopReasonFork:
case eStopReasonVFork:
case eStopReasonVForkDone:
case eStopReasonThreadExiting:
case eStopReasonInstrumentation:
case eStopReasonProcessorTrace:
if (!other_thread)
other_thread = thread;
break;
case eStopReasonPlanComplete:
if (!plan_thread)
plan_thread = thread;
break;
}
}
if (plan_thread)
thread_list.SetSelectedThreadByID(plan_thread->GetID());
else if (other_thread)
thread_list.SetSelectedThreadByID(other_thread->GetID());
else {
if (curr_thread && curr_thread->IsValid())
thread = curr_thread;
else
thread = thread_list.GetThreadAtIndex(0);
if (thread)
thread_list.SetSelectedThreadByID(thread->GetID());
}
}
}
// Drop the ThreadList mutex by here, since GetThreadStatus below might
// have to run code, e.g. for Data formatters, and if we hold the
// ThreadList mutex, then the process is going to have a hard time
// restarting the process.
if (stream) {
Debugger &debugger = process_sp->GetTarget().GetDebugger();
if (debugger.GetTargetList().GetSelectedTarget().get() ==
&process_sp->GetTarget()) {
ThreadSP thread_sp = process_sp->GetThreadList().GetSelectedThread();
if (!thread_sp || !thread_sp->IsValid())
return false;
const bool only_threads_with_stop_reason = true;
const uint32_t start_frame =
thread_sp->GetSelectedFrameIndex(select_most_relevant);
const uint32_t num_frames = 1;
const uint32_t num_frames_with_source = 1;
const bool stop_format = true;
process_sp->GetStatus(*stream);
process_sp->GetThreadStatus(*stream, only_threads_with_stop_reason,
start_frame, num_frames,
num_frames_with_source,
stop_format);
if (curr_thread_stop_info_sp) {
lldb::addr_t crashing_address;
ValueObjectSP valobj_sp = StopInfo::GetCrashingDereference(
curr_thread_stop_info_sp, &crashing_address);
if (valobj_sp) {
const ValueObject::GetExpressionPathFormat format =
ValueObject::GetExpressionPathFormat::
eGetExpressionPathFormatHonorPointers;
stream->PutCString("Likely cause: ");
valobj_sp->GetExpressionPath(*stream, format);
stream->Printf(" accessed 0x%" PRIx64 "\n", crashing_address);
}
}
} else {
uint32_t target_idx = debugger.GetTargetList().GetIndexOfTarget(
process_sp->GetTarget().shared_from_this());
if (target_idx != UINT32_MAX)
stream->Printf("Target %d: (", target_idx);
else
stream->Printf("Target <unknown index>: (");
process_sp->GetTarget().Dump(stream, eDescriptionLevelBrief);
stream->Printf(") stopped.\n");
}
}
// Pop the process IO handler
pop_process_io_handler = true;
}
break;
}
if (handle_pop && pop_process_io_handler)
process_sp->PopProcessIOHandler();
return true;
}
bool Process::HijackProcessEvents(ListenerSP listener_sp) {
if (listener_sp) {
return HijackBroadcaster(listener_sp, eBroadcastBitStateChanged |
eBroadcastBitInterrupt);
} else
return false;
}
void Process::RestoreProcessEvents() { RestoreBroadcaster(); }
StateType Process::GetStateChangedEvents(EventSP &event_sp,
const Timeout<std::micro> &timeout,
ListenerSP hijack_listener_sp) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOG(log, "timeout = {0}, event_sp)...", timeout);
ListenerSP listener_sp = hijack_listener_sp;
if (!listener_sp)
listener_sp = GetPrimaryListener();
StateType state = eStateInvalid;
if (listener_sp->GetEventForBroadcasterWithType(
this, eBroadcastBitStateChanged | eBroadcastBitInterrupt, event_sp,
timeout)) {
if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged)
state = Process::ProcessEventData::GetStateFromEvent(event_sp.get());
else
LLDB_LOG(log, "got no event or was interrupted.");
}
LLDB_LOG(log, "timeout = {0}, event_sp) => {1}", timeout, state);
return state;
}
Event *Process::PeekAtStateChangedEvents() {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log, "Process::%s...", __FUNCTION__);
Event *event_ptr;
event_ptr = GetPrimaryListener()->PeekAtNextEventForBroadcasterWithType(
this, eBroadcastBitStateChanged);
if (log) {
if (event_ptr) {
LLDB_LOGF(log, "Process::%s (event_ptr) => %s", __FUNCTION__,
StateAsCString(ProcessEventData::GetStateFromEvent(event_ptr)));
} else {
LLDB_LOGF(log, "Process::%s no events found", __FUNCTION__);
}
}
return event_ptr;
}
StateType
Process::GetStateChangedEventsPrivate(EventSP &event_sp,
const Timeout<std::micro> &timeout) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOG(log, "timeout = {0}, event_sp)...", timeout);
StateType state = eStateInvalid;
if (m_private_state_listener_sp->GetEventForBroadcasterWithType(
&m_private_state_broadcaster,
eBroadcastBitStateChanged | eBroadcastBitInterrupt, event_sp,
timeout))
if (event_sp && event_sp->GetType() == eBroadcastBitStateChanged)
state = Process::ProcessEventData::GetStateFromEvent(event_sp.get());
LLDB_LOG(log, "timeout = {0}, event_sp) => {1}", timeout,
state == eStateInvalid ? "TIMEOUT" : StateAsCString(state));
return state;
}
bool Process::GetEventsPrivate(EventSP &event_sp,
const Timeout<std::micro> &timeout,
bool control_only) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOG(log, "timeout = {0}, event_sp)...", timeout);
if (control_only)
return m_private_state_listener_sp->GetEventForBroadcaster(
&m_private_state_control_broadcaster, event_sp, timeout);
else
return m_private_state_listener_sp->GetEvent(event_sp, timeout);
}
bool Process::IsRunning() const {
return StateIsRunningState(m_public_state.GetValue());
}
int Process::GetExitStatus() {
std::lock_guard<std::mutex> guard(m_exit_status_mutex);
if (m_public_state.GetValue() == eStateExited)
return m_exit_status;
return -1;
}
const char *Process::GetExitDescription() {
std::lock_guard<std::mutex> guard(m_exit_status_mutex);
if (m_public_state.GetValue() == eStateExited && !m_exit_string.empty())
return m_exit_string.c_str();
return nullptr;
}
bool Process::SetExitStatus(int status, llvm::StringRef exit_string) {
// Use a mutex to protect setting the exit status.
std::lock_guard<std::mutex> guard(m_exit_status_mutex);
Log *log(GetLog(LLDBLog::State | LLDBLog::Process));
LLDB_LOG(log, "(plugin = {0} status = {1} ({1:x8}), description=\"{2}\")",
GetPluginName(), status, exit_string);
// We were already in the exited state
if (m_private_state.GetValue() == eStateExited) {
LLDB_LOG(
log,
"(plugin = {0}) ignoring exit status because state was already set "
"to eStateExited",
GetPluginName());
return false;
}
m_exit_status = status;
if (!exit_string.empty())
m_exit_string = exit_string.str();
else
m_exit_string.clear();
// Clear the last natural stop ID since it has a strong reference to this
// process
m_mod_id.SetStopEventForLastNaturalStopID(EventSP());
SetPrivateState(eStateExited);
// Allow subclasses to do some cleanup
DidExit();
return true;
}
bool Process::IsAlive() {
switch (m_private_state.GetValue()) {
case eStateConnected:
case eStateAttaching:
case eStateLaunching:
case eStateStopped:
case eStateRunning:
case eStateStepping:
case eStateCrashed:
case eStateSuspended:
return true;
default:
return false;
}
}
// This static callback can be used to watch for local child processes on the
// current host. The child process exits, the process will be found in the
// global target list (we want to be completely sure that the
// lldb_private::Process doesn't go away before we can deliver the signal.
bool Process::SetProcessExitStatus(
lldb::pid_t pid, bool exited,
int signo, // Zero for no signal
int exit_status // Exit value of process if signal is zero
) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log,
"Process::SetProcessExitStatus (pid=%" PRIu64
", exited=%i, signal=%i, exit_status=%i)\n",
pid, exited, signo, exit_status);
if (exited) {
TargetSP target_sp(Debugger::FindTargetWithProcessID(pid));
if (target_sp) {
ProcessSP process_sp(target_sp->GetProcessSP());
if (process_sp) {
llvm::StringRef signal_str =
process_sp->GetUnixSignals()->GetSignalAsStringRef(signo);
process_sp->SetExitStatus(exit_status, signal_str);
}
}
return true;
}
return false;
}
bool Process::UpdateThreadList(ThreadList &old_thread_list,
ThreadList &new_thread_list) {
m_thread_plans.ClearThreadCache();
return DoUpdateThreadList(old_thread_list, new_thread_list);
}
void Process::UpdateThreadListIfNeeded() {
const uint32_t stop_id = GetStopID();
if (m_thread_list.GetSize(false) == 0 ||
stop_id != m_thread_list.GetStopID()) {
bool clear_unused_threads = true;
const StateType state = GetPrivateState();
if (StateIsStoppedState(state, true)) {
std::lock_guard<std::recursive_mutex> guard(m_thread_list.GetMutex());
m_thread_list.SetStopID(stop_id);
// m_thread_list does have its own mutex, but we need to hold onto the
// mutex between the call to UpdateThreadList(...) and the
// os->UpdateThreadList(...) so it doesn't change on us
ThreadList &old_thread_list = m_thread_list;
ThreadList real_thread_list(this);
ThreadList new_thread_list(this);
// Always update the thread list with the protocol specific thread list,
// but only update if "true" is returned
if (UpdateThreadList(m_thread_list_real, real_thread_list)) {
// Don't call into the OperatingSystem to update the thread list if we
// are shutting down, since that may call back into the SBAPI's,
// requiring the API lock which is already held by whoever is shutting
// us down, causing a deadlock.
OperatingSystem *os = GetOperatingSystem();
if (os && !m_destroy_in_process) {
// Clear any old backing threads where memory threads might have been
// backed by actual threads from the lldb_private::Process subclass
size_t num_old_threads = old_thread_list.GetSize(false);
for (size_t i = 0; i < num_old_threads; ++i)
old_thread_list.GetThreadAtIndex(i, false)->ClearBackingThread();
// See if the OS plugin reports all threads. If it does, then
// it is safe to clear unseen thread's plans here. Otherwise we
// should preserve them in case they show up again:
clear_unused_threads = GetOSPluginReportsAllThreads();
// Turn off dynamic types to ensure we don't run any expressions.
// Objective-C can run an expression to determine if a SBValue is a
// dynamic type or not and we need to avoid this. OperatingSystem
// plug-ins can't run expressions that require running code...
Target &target = GetTarget();
const lldb::DynamicValueType saved_prefer_dynamic =
target.GetPreferDynamicValue();
if (saved_prefer_dynamic != lldb::eNoDynamicValues)
target.SetPreferDynamicValue(lldb::eNoDynamicValues);
// Now let the OperatingSystem plug-in update the thread list
os->UpdateThreadList(
old_thread_list, // Old list full of threads created by OS plug-in
real_thread_list, // The actual thread list full of threads
// created by each lldb_private::Process
// subclass
new_thread_list); // The new thread list that we will show to the
// user that gets filled in
if (saved_prefer_dynamic != lldb::eNoDynamicValues)
target.SetPreferDynamicValue(saved_prefer_dynamic);
} else {
// No OS plug-in, the new thread list is the same as the real thread
// list.
new_thread_list = real_thread_list;
}
m_thread_list_real.Update(real_thread_list);
m_thread_list.Update(new_thread_list);
m_thread_list.SetStopID(stop_id);
if (GetLastNaturalStopID() != m_extended_thread_stop_id) {
// Clear any extended threads that we may have accumulated previously
m_extended_thread_list.Clear();
m_extended_thread_stop_id = GetLastNaturalStopID();
m_queue_list.Clear();
m_queue_list_stop_id = GetLastNaturalStopID();
}
}
// Now update the plan stack map.
// If we do have an OS plugin, any absent real threads in the
// m_thread_list have already been removed from the ThreadPlanStackMap.
// So any remaining threads are OS Plugin threads, and those we want to
// preserve in case they show up again.
m_thread_plans.Update(m_thread_list, clear_unused_threads);
}
}
}
ThreadPlanStack *Process::FindThreadPlans(lldb::tid_t tid) {
return m_thread_plans.Find(tid);
}
bool Process::PruneThreadPlansForTID(lldb::tid_t tid) {
return m_thread_plans.PrunePlansForTID(tid);
}
void Process::PruneThreadPlans() {
m_thread_plans.Update(GetThreadList(), true, false);
}
bool Process::DumpThreadPlansForTID(Stream &strm, lldb::tid_t tid,
lldb::DescriptionLevel desc_level,
bool internal, bool condense_trivial,
bool skip_unreported_plans) {
return m_thread_plans.DumpPlansForTID(
strm, tid, desc_level, internal, condense_trivial, skip_unreported_plans);
}
void Process::DumpThreadPlans(Stream &strm, lldb::DescriptionLevel desc_level,
bool internal, bool condense_trivial,
bool skip_unreported_plans) {
m_thread_plans.DumpPlans(strm, desc_level, internal, condense_trivial,
skip_unreported_plans);
}
void Process::UpdateQueueListIfNeeded() {
if (m_system_runtime_up) {
if (m_queue_list.GetSize() == 0 ||
m_queue_list_stop_id != GetLastNaturalStopID()) {
const StateType state = GetPrivateState();
if (StateIsStoppedState(state, true)) {
m_system_runtime_up->PopulateQueueList(m_queue_list);
m_queue_list_stop_id = GetLastNaturalStopID();
}
}
}
}
ThreadSP Process::CreateOSPluginThread(lldb::tid_t tid, lldb::addr_t context) {
OperatingSystem *os = GetOperatingSystem();
if (os)
return os->CreateThread(tid, context);
return ThreadSP();
}
uint32_t Process::GetNextThreadIndexID(uint64_t thread_id) {
return AssignIndexIDToThread(thread_id);
}
bool Process::HasAssignedIndexIDToThread(uint64_t thread_id) {
return (m_thread_id_to_index_id_map.find(thread_id) !=
m_thread_id_to_index_id_map.end());
}
uint32_t Process::AssignIndexIDToThread(uint64_t thread_id) {
uint32_t result = 0;
std::map<uint64_t, uint32_t>::iterator iterator =
m_thread_id_to_index_id_map.find(thread_id);
if (iterator == m_thread_id_to_index_id_map.end()) {
result = ++m_thread_index_id;
m_thread_id_to_index_id_map[thread_id] = result;
} else {
result = iterator->second;
}
return result;
}
StateType Process::GetState() {
if (CurrentThreadIsPrivateStateThread())
return m_private_state.GetValue();
else
return m_public_state.GetValue();
}
void Process::SetPublicState(StateType new_state, bool restarted) {
const bool new_state_is_stopped = StateIsStoppedState(new_state, false);
if (new_state_is_stopped) {
// This will only set the time if the public stop time has no value, so
// it is ok to call this multiple times. With a public stop we can't look
// at the stop ID because many private stops might have happened, so we
// can't check for a stop ID of zero. This allows the "statistics" command
// to dump the time it takes to reach somewhere in your code, like a
// breakpoint you set.
GetTarget().GetStatistics().SetFirstPublicStopTime();
}
Log *log(GetLog(LLDBLog::State | LLDBLog::Process));
LLDB_LOGF(log, "(plugin = %s, state = %s, restarted = %i)",
GetPluginName().data(), StateAsCString(new_state), restarted);
const StateType old_state = m_public_state.GetValue();
m_public_state.SetValue(new_state);
// On the transition from Run to Stopped, we unlock the writer end of the run
// lock. The lock gets locked in Resume, which is the public API to tell the
// program to run.
if (!StateChangedIsExternallyHijacked()) {
if (new_state == eStateDetached) {
LLDB_LOGF(log,
"(plugin = %s, state = %s) -- unlocking run lock for detach",
GetPluginName().data(), StateAsCString(new_state));
m_public_run_lock.SetStopped();
} else {
const bool old_state_is_stopped = StateIsStoppedState(old_state, false);
if ((old_state_is_stopped != new_state_is_stopped)) {
if (new_state_is_stopped && !restarted) {
LLDB_LOGF(log, "(plugin = %s, state = %s) -- unlocking run lock",
GetPluginName().data(), StateAsCString(new_state));
m_public_run_lock.SetStopped();
}
}
}
}
}
Status Process::Resume() {
Log *log(GetLog(LLDBLog::State | LLDBLog::Process));
LLDB_LOGF(log, "(plugin = %s) -- locking run lock", GetPluginName().data());
if (!m_public_run_lock.TrySetRunning()) {
Status error("Resume request failed - process still running.");
LLDB_LOGF(log, "(plugin = %s) -- TrySetRunning failed, not resuming.",
GetPluginName().data());
return error;
}
Status error = PrivateResume();
if (!error.Success()) {
// Undo running state change
m_public_run_lock.SetStopped();
}
return error;
}
Status Process::ResumeSynchronous(Stream *stream) {
Log *log(GetLog(LLDBLog::State | LLDBLog::Process));
LLDB_LOGF(log, "Process::ResumeSynchronous -- locking run lock");
if (!m_public_run_lock.TrySetRunning()) {
Status error("Resume request failed - process still running.");
LLDB_LOGF(log, "Process::Resume: -- TrySetRunning failed, not resuming.");
return error;
}
ListenerSP listener_sp(
Listener::MakeListener(ResumeSynchronousHijackListenerName.data()));
HijackProcessEvents(listener_sp);
Status error = PrivateResume();
if (error.Success()) {
StateType state =
WaitForProcessToStop(std::nullopt, nullptr, true, listener_sp, stream,
true /* use_run_lock */, SelectMostRelevantFrame);
const bool must_be_alive =
false; // eStateExited is ok, so this must be false
if (!StateIsStoppedState(state, must_be_alive))
error.SetErrorStringWithFormat(
"process not in stopped state after synchronous resume: %s",
StateAsCString(state));
} else {
// Undo running state change
m_public_run_lock.SetStopped();
}
// Undo the hijacking of process events...
RestoreProcessEvents();
return error;
}
bool Process::StateChangedIsExternallyHijacked() {
if (IsHijackedForEvent(eBroadcastBitStateChanged)) {
llvm::StringRef hijacking_name = GetHijackingListenerName();
if (!hijacking_name.starts_with("lldb.internal"))
return true;
}
return false;
}
bool Process::StateChangedIsHijackedForSynchronousResume() {
if (IsHijackedForEvent(eBroadcastBitStateChanged)) {
llvm::StringRef hijacking_name = GetHijackingListenerName();
if (hijacking_name == ResumeSynchronousHijackListenerName)
return true;
}
return false;
}
StateType Process::GetPrivateState() { return m_private_state.GetValue(); }
void Process::SetPrivateState(StateType new_state) {
// Use m_destructing not m_finalizing here. If we are finalizing a process
// that we haven't started tearing down, we'd like to be able to nicely
// detach if asked, but that requires the event system be live. That will
// not be true for an in-the-middle-of-being-destructed Process, since the
// event system relies on Process::shared_from_this, which may have already
// been destroyed.
if (m_destructing)
return;
Log *log(GetLog(LLDBLog::State | LLDBLog::Process | LLDBLog::Unwind));
bool state_changed = false;
LLDB_LOGF(log, "(plugin = %s, state = %s)", GetPluginName().data(),
StateAsCString(new_state));
std::lock_guard<std::recursive_mutex> thread_guard(m_thread_list.GetMutex());
std::lock_guard<std::recursive_mutex> guard(m_private_state.GetMutex());
const StateType old_state = m_private_state.GetValueNoLock();
state_changed = old_state != new_state;
const bool old_state_is_stopped = StateIsStoppedState(old_state, false);
const bool new_state_is_stopped = StateIsStoppedState(new_state, false);
if (old_state_is_stopped != new_state_is_stopped) {
if (new_state_is_stopped)
m_private_run_lock.SetStopped();
else
m_private_run_lock.SetRunning();
}
if (state_changed) {
m_private_state.SetValueNoLock(new_state);
EventSP event_sp(
new Event(eBroadcastBitStateChanged,
new ProcessEventData(shared_from_this(), new_state)));
if (StateIsStoppedState(new_state, false)) {
// Note, this currently assumes that all threads in the list stop when
// the process stops. In the future we will want to support a debugging
// model where some threads continue to run while others are stopped.
// When that happens we will either need a way for the thread list to
// identify which threads are stopping or create a special thread list
// containing only threads which actually stopped.
//
// The process plugin is responsible for managing the actual behavior of
// the threads and should have stopped any threads that are going to stop
// before we get here.
m_thread_list.DidStop();
if (m_mod_id.BumpStopID() == 0)
GetTarget().GetStatistics().SetFirstPrivateStopTime();
if (!m_mod_id.IsLastResumeForUserExpression())
m_mod_id.SetStopEventForLastNaturalStopID(event_sp);
m_memory_cache.Clear();
LLDB_LOGF(log, "(plugin = %s, state = %s, stop_id = %u",
GetPluginName().data(), StateAsCString(new_state),
m_mod_id.GetStopID());
}
m_private_state_broadcaster.BroadcastEvent(event_sp);
} else {
LLDB_LOGF(log, "(plugin = %s, state = %s) state didn't change. Ignoring...",
GetPluginName().data(), StateAsCString(new_state));
}
}
void Process::SetRunningUserExpression(bool on) {
m_mod_id.SetRunningUserExpression(on);
}
void Process::SetRunningUtilityFunction(bool on) {
m_mod_id.SetRunningUtilityFunction(on);
}
addr_t Process::GetImageInfoAddress() { return LLDB_INVALID_ADDRESS; }
const lldb::ABISP &Process::GetABI() {
if (!m_abi_sp)
m_abi_sp = ABI::FindPlugin(shared_from_this(), GetTarget().GetArchitecture());
return m_abi_sp;
}
std::vector<LanguageRuntime *> Process::GetLanguageRuntimes() {
std::vector<LanguageRuntime *> language_runtimes;
if (m_finalizing)
return language_runtimes;
std::lock_guard<std::recursive_mutex> guard(m_language_runtimes_mutex);
// Before we pass off a copy of the language runtimes, we must make sure that
// our collection is properly populated. It's possible that some of the
// language runtimes were not loaded yet, either because nobody requested it
// yet or the proper condition for loading wasn't yet met (e.g. libc++.so
// hadn't been loaded).
for (const lldb::LanguageType lang_type : Language::GetSupportedLanguages()) {
if (LanguageRuntime *runtime = GetLanguageRuntime(lang_type))
language_runtimes.emplace_back(runtime);
}
return language_runtimes;
}
LanguageRuntime *Process::GetLanguageRuntime(lldb::LanguageType language) {
if (m_finalizing)
return nullptr;
LanguageRuntime *runtime = nullptr;
std::lock_guard<std::recursive_mutex> guard(m_language_runtimes_mutex);
LanguageRuntimeCollection::iterator pos;
pos = m_language_runtimes.find(language);
if (pos == m_language_runtimes.end() || !pos->second) {
lldb::LanguageRuntimeSP runtime_sp(
LanguageRuntime::FindPlugin(this, language));
m_language_runtimes[language] = runtime_sp;
runtime = runtime_sp.get();
} else
runtime = pos->second.get();
if (runtime)
// It's possible that a language runtime can support multiple LanguageTypes,
// for example, CPPLanguageRuntime will support eLanguageTypeC_plus_plus,
// eLanguageTypeC_plus_plus_03, etc. Because of this, we should get the
// primary language type and make sure that our runtime supports it.
assert(runtime->GetLanguageType() == Language::GetPrimaryLanguage(language));
return runtime;
}
bool Process::IsPossibleDynamicValue(ValueObject &in_value) {
if (m_finalizing)
return false;
if (in_value.IsDynamic())
return false;
LanguageType known_type = in_value.GetObjectRuntimeLanguage();
if (known_type != eLanguageTypeUnknown && known_type != eLanguageTypeC) {
LanguageRuntime *runtime = GetLanguageRuntime(known_type);
return runtime ? runtime->CouldHaveDynamicValue(in_value) : false;
}
for (LanguageRuntime *runtime : GetLanguageRuntimes()) {
if (runtime->CouldHaveDynamicValue(in_value))
return true;
}
return false;
}
void Process::SetDynamicCheckers(DynamicCheckerFunctions *dynamic_checkers) {
m_dynamic_checkers_up.reset(dynamic_checkers);
}
StopPointSiteList<BreakpointSite> &Process::GetBreakpointSiteList() {
return m_breakpoint_site_list;
}
const StopPointSiteList<BreakpointSite> &
Process::GetBreakpointSiteList() const {
return m_breakpoint_site_list;
}
void Process::DisableAllBreakpointSites() {
m_breakpoint_site_list.ForEach([this](BreakpointSite *bp_site) -> void {
// bp_site->SetEnabled(true);
DisableBreakpointSite(bp_site);
});
}
Status Process::ClearBreakpointSiteByID(lldb::user_id_t break_id) {
Status error(DisableBreakpointSiteByID(break_id));
if (error.Success())
m_breakpoint_site_list.Remove(break_id);
return error;
}
Status Process::DisableBreakpointSiteByID(lldb::user_id_t break_id) {
Status error;
BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID(break_id);
if (bp_site_sp) {
if (bp_site_sp->IsEnabled())
error = DisableBreakpointSite(bp_site_sp.get());
} else {
error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64,
break_id);
}
return error;
}
Status Process::EnableBreakpointSiteByID(lldb::user_id_t break_id) {
Status error;
BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID(break_id);
if (bp_site_sp) {
if (!bp_site_sp->IsEnabled())
error = EnableBreakpointSite(bp_site_sp.get());
} else {
error.SetErrorStringWithFormat("invalid breakpoint site ID: %" PRIu64,
break_id);
}
return error;
}
lldb::break_id_t
Process::CreateBreakpointSite(const BreakpointLocationSP &constituent,
bool use_hardware) {
addr_t load_addr = LLDB_INVALID_ADDRESS;
bool show_error = true;
switch (GetState()) {
case eStateInvalid:
case eStateUnloaded:
case eStateConnected:
case eStateAttaching:
case eStateLaunching:
case eStateDetached:
case eStateExited:
show_error = false;
break;
case eStateStopped:
case eStateRunning:
case eStateStepping:
case eStateCrashed:
case eStateSuspended:
show_error = IsAlive();
break;
}
// Reset the IsIndirect flag here, in case the location changes from pointing
// to a indirect symbol to a regular symbol.
constituent->SetIsIndirect(false);
if (constituent->ShouldResolveIndirectFunctions()) {
Symbol *symbol = constituent->GetAddress().CalculateSymbolContextSymbol();
if (symbol && symbol->IsIndirect()) {
Status error;
Address symbol_address = symbol->GetAddress();
load_addr = ResolveIndirectFunction(&symbol_address, error);
if (!error.Success() && show_error) {
GetTarget().GetDebugger().GetErrorStream().Printf(
"warning: failed to resolve indirect function at 0x%" PRIx64
" for breakpoint %i.%i: %s\n",
symbol->GetLoadAddress(&GetTarget()),
constituent->GetBreakpoint().GetID(), constituent->GetID(),
error.AsCString() ? error.AsCString() : "unknown error");
return LLDB_INVALID_BREAK_ID;
}
Address resolved_address(load_addr);
load_addr = resolved_address.GetOpcodeLoadAddress(&GetTarget());
constituent->SetIsIndirect(true);
} else
load_addr = constituent->GetAddress().GetOpcodeLoadAddress(&GetTarget());
} else
load_addr = constituent->GetAddress().GetOpcodeLoadAddress(&GetTarget());
if (load_addr != LLDB_INVALID_ADDRESS) {
BreakpointSiteSP bp_site_sp;
// Look up this breakpoint site. If it exists, then add this new
// constituent, otherwise create a new breakpoint site and add it.
bp_site_sp = m_breakpoint_site_list.FindByAddress(load_addr);
if (bp_site_sp) {
bp_site_sp->AddConstituent(constituent);
constituent->SetBreakpointSite(bp_site_sp);
return bp_site_sp->GetID();
} else {
bp_site_sp.reset(
new BreakpointSite(constituent, load_addr, use_hardware));
if (bp_site_sp) {
Status error = EnableBreakpointSite(bp_site_sp.get());
if (error.Success()) {
constituent->SetBreakpointSite(bp_site_sp);
return m_breakpoint_site_list.Add(bp_site_sp);
} else {
if (show_error || use_hardware) {
// Report error for setting breakpoint...
GetTarget().GetDebugger().GetErrorStream().Printf(
"warning: failed to set breakpoint site at 0x%" PRIx64
" for breakpoint %i.%i: %s\n",
load_addr, constituent->GetBreakpoint().GetID(),
constituent->GetID(),
error.AsCString() ? error.AsCString() : "unknown error");
}
}
}
}
}
// We failed to enable the breakpoint
return LLDB_INVALID_BREAK_ID;
}
void Process::RemoveConstituentFromBreakpointSite(
lldb::user_id_t constituent_id, lldb::user_id_t constituent_loc_id,
BreakpointSiteSP &bp_site_sp) {
uint32_t num_constituents =
bp_site_sp->RemoveConstituent(constituent_id, constituent_loc_id);
if (num_constituents == 0) {
// Don't try to disable the site if we don't have a live process anymore.
if (IsAlive())
DisableBreakpointSite(bp_site_sp.get());
m_breakpoint_site_list.RemoveByAddress(bp_site_sp->GetLoadAddress());
}
}
size_t Process::RemoveBreakpointOpcodesFromBuffer(addr_t bp_addr, size_t size,
uint8_t *buf) const {
size_t bytes_removed = 0;
StopPointSiteList<BreakpointSite> bp_sites_in_range;
if (m_breakpoint_site_list.FindInRange(bp_addr, bp_addr + size,
bp_sites_in_range)) {
bp_sites_in_range.ForEach([bp_addr, size,
buf](BreakpointSite *bp_site) -> void {
if (bp_site->GetType() == BreakpointSite::eSoftware) {
addr_t intersect_addr;
size_t intersect_size;
size_t opcode_offset;
if (bp_site->IntersectsRange(bp_addr, size, &intersect_addr,
&intersect_size, &opcode_offset)) {
assert(bp_addr <= intersect_addr && intersect_addr < bp_addr + size);
assert(bp_addr < intersect_addr + intersect_size &&
intersect_addr + intersect_size <= bp_addr + size);
assert(opcode_offset + intersect_size <= bp_site->GetByteSize());
size_t buf_offset = intersect_addr - bp_addr;
::memcpy(buf + buf_offset,
bp_site->GetSavedOpcodeBytes() + opcode_offset,
intersect_size);
}
}
});
}
return bytes_removed;
}
size_t Process::GetSoftwareBreakpointTrapOpcode(BreakpointSite *bp_site) {
PlatformSP platform_sp(GetTarget().GetPlatform());
if (platform_sp)
return platform_sp->GetSoftwareBreakpointTrapOpcode(GetTarget(), bp_site);
return 0;
}
Status Process::EnableSoftwareBreakpoint(BreakpointSite *bp_site) {
Status error;
assert(bp_site != nullptr);
Log *log = GetLog(LLDBLog::Breakpoints);
const addr_t bp_addr = bp_site->GetLoadAddress();
LLDB_LOGF(
log, "Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64,
bp_site->GetID(), (uint64_t)bp_addr);
if (bp_site->IsEnabled()) {
LLDB_LOGF(
log,
"Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64
" -- already enabled",
bp_site->GetID(), (uint64_t)bp_addr);
return error;
}
if (bp_addr == LLDB_INVALID_ADDRESS) {
error.SetErrorString("BreakpointSite contains an invalid load address.");
return error;
}
// Ask the lldb::Process subclass to fill in the correct software breakpoint
// trap for the breakpoint site
const size_t bp_opcode_size = GetSoftwareBreakpointTrapOpcode(bp_site);
if (bp_opcode_size == 0) {
error.SetErrorStringWithFormat("Process::GetSoftwareBreakpointTrapOpcode() "
"returned zero, unable to get breakpoint "
"trap for address 0x%" PRIx64,
bp_addr);
} else {
const uint8_t *const bp_opcode_bytes = bp_site->GetTrapOpcodeBytes();
if (bp_opcode_bytes == nullptr) {
error.SetErrorString(
"BreakpointSite doesn't contain a valid breakpoint trap opcode.");
return error;
}
// Save the original opcode by reading it
if (DoReadMemory(bp_addr, bp_site->GetSavedOpcodeBytes(), bp_opcode_size,
error) == bp_opcode_size) {
// Write a software breakpoint in place of the original opcode
if (DoWriteMemory(bp_addr, bp_opcode_bytes, bp_opcode_size, error) ==
bp_opcode_size) {
uint8_t verify_bp_opcode_bytes[64];
if (DoReadMemory(bp_addr, verify_bp_opcode_bytes, bp_opcode_size,
error) == bp_opcode_size) {
if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes,
bp_opcode_size) == 0) {
bp_site->SetEnabled(true);
bp_site->SetType(BreakpointSite::eSoftware);
LLDB_LOGF(log,
"Process::EnableSoftwareBreakpoint (site_id = %d) "
"addr = 0x%" PRIx64 " -- SUCCESS",
bp_site->GetID(), (uint64_t)bp_addr);
} else
error.SetErrorString(
"failed to verify the breakpoint trap in memory.");
} else
error.SetErrorString(
"Unable to read memory to verify breakpoint trap.");
} else
error.SetErrorString("Unable to write breakpoint trap to memory.");
} else
error.SetErrorString("Unable to read memory at breakpoint address.");
}
if (log && error.Fail())
LLDB_LOGF(
log,
"Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64
" -- FAILED: %s",
bp_site->GetID(), (uint64_t)bp_addr, error.AsCString());
return error;
}
Status Process::DisableSoftwareBreakpoint(BreakpointSite *bp_site) {
Status error;
assert(bp_site != nullptr);
Log *log = GetLog(LLDBLog::Breakpoints);
addr_t bp_addr = bp_site->GetLoadAddress();
lldb::user_id_t breakID = bp_site->GetID();
LLDB_LOGF(log,
"Process::DisableSoftwareBreakpoint (breakID = %" PRIu64
") addr = 0x%" PRIx64,
breakID, (uint64_t)bp_addr);
if (bp_site->IsHardware()) {
error.SetErrorString("Breakpoint site is a hardware breakpoint.");
} else if (bp_site->IsEnabled()) {
const size_t break_op_size = bp_site->GetByteSize();
const uint8_t *const break_op = bp_site->GetTrapOpcodeBytes();
if (break_op_size > 0) {
// Clear a software breakpoint instruction
uint8_t curr_break_op[8];
assert(break_op_size <= sizeof(curr_break_op));
bool break_op_found = false;
// Read the breakpoint opcode
if (DoReadMemory(bp_addr, curr_break_op, break_op_size, error) ==
break_op_size) {
bool verify = false;
// Make sure the breakpoint opcode exists at this address
if (::memcmp(curr_break_op, break_op, break_op_size) == 0) {
break_op_found = true;
// We found a valid breakpoint opcode at this address, now restore
// the saved opcode.
if (DoWriteMemory(bp_addr, bp_site->GetSavedOpcodeBytes(),
break_op_size, error) == break_op_size) {
verify = true;
} else
error.SetErrorString(
"Memory write failed when restoring original opcode.");
} else {
error.SetErrorString(
"Original breakpoint trap is no longer in memory.");
// Set verify to true and so we can check if the original opcode has
// already been restored
verify = true;
}
if (verify) {
uint8_t verify_opcode[8];
assert(break_op_size < sizeof(verify_opcode));
// Verify that our original opcode made it back to the inferior
if (DoReadMemory(bp_addr, verify_opcode, break_op_size, error) ==
break_op_size) {
// compare the memory we just read with the original opcode
if (::memcmp(bp_site->GetSavedOpcodeBytes(), verify_opcode,
break_op_size) == 0) {
// SUCCESS
bp_site->SetEnabled(false);
LLDB_LOGF(log,
"Process::DisableSoftwareBreakpoint (site_id = %d) "
"addr = 0x%" PRIx64 " -- SUCCESS",
bp_site->GetID(), (uint64_t)bp_addr);
return error;
} else {
if (break_op_found)
error.SetErrorString("Failed to restore original opcode.");
}
} else
error.SetErrorString("Failed to read memory to verify that "
"breakpoint trap was restored.");
}
} else
error.SetErrorString(
"Unable to read memory that should contain the breakpoint trap.");
}
} else {
LLDB_LOGF(
log,
"Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64
" -- already disabled",
bp_site->GetID(), (uint64_t)bp_addr);
return error;
}
LLDB_LOGF(
log,
"Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%" PRIx64
" -- FAILED: %s",
bp_site->GetID(), (uint64_t)bp_addr, error.AsCString());
return error;
}
// Uncomment to verify memory caching works after making changes to caching
// code
//#define VERIFY_MEMORY_READS
size_t Process::ReadMemory(addr_t addr, void *buf, size_t size, Status &error) {
if (ABISP abi_sp = GetABI())
addr = abi_sp->FixAnyAddress(addr);
error.Clear();
if (!GetDisableMemoryCache()) {
#if defined(VERIFY_MEMORY_READS)
// Memory caching is enabled, with debug verification
if (buf && size) {
// Uncomment the line below to make sure memory caching is working.
// I ran this through the test suite and got no assertions, so I am
// pretty confident this is working well. If any changes are made to
// memory caching, uncomment the line below and test your changes!
// Verify all memory reads by using the cache first, then redundantly
// reading the same memory from the inferior and comparing to make sure
// everything is exactly the same.
std::string verify_buf(size, '\0');
assert(verify_buf.size() == size);
const size_t cache_bytes_read =
m_memory_cache.Read(this, addr, buf, size, error);
Status verify_error;
const size_t verify_bytes_read =
ReadMemoryFromInferior(addr, const_cast<char *>(verify_buf.data()),
verify_buf.size(), verify_error);
assert(cache_bytes_read == verify_bytes_read);
assert(memcmp(buf, verify_buf.data(), verify_buf.size()) == 0);
assert(verify_error.Success() == error.Success());
return cache_bytes_read;
}
return 0;
#else // !defined(VERIFY_MEMORY_READS)
// Memory caching is enabled, without debug verification
return m_memory_cache.Read(addr, buf, size, error);
#endif // defined (VERIFY_MEMORY_READS)
} else {
// Memory caching is disabled
return ReadMemoryFromInferior(addr, buf, size, error);
}
}
size_t Process::ReadCStringFromMemory(addr_t addr, std::string &out_str,
Status &error) {
char buf[256];
out_str.clear();
addr_t curr_addr = addr;
while (true) {
size_t length = ReadCStringFromMemory(curr_addr, buf, sizeof(buf), error);
if (length == 0)
break;
out_str.append(buf, length);
// If we got "length - 1" bytes, we didn't get the whole C string, we need
// to read some more characters
if (length == sizeof(buf) - 1)
curr_addr += length;
else
break;
}
return out_str.size();
}
// Deprecated in favor of ReadStringFromMemory which has wchar support and
// correct code to find null terminators.
size_t Process::ReadCStringFromMemory(addr_t addr, char *dst,
size_t dst_max_len,
Status &result_error) {
size_t total_cstr_len = 0;
if (dst && dst_max_len) {
result_error.Clear();
// NULL out everything just to be safe
memset(dst, 0, dst_max_len);
Status error;
addr_t curr_addr = addr;
const size_t cache_line_size = m_memory_cache.GetMemoryCacheLineSize();
size_t bytes_left = dst_max_len - 1;
char *curr_dst = dst;
while (bytes_left > 0) {
addr_t cache_line_bytes_left =
cache_line_size - (curr_addr % cache_line_size);
addr_t bytes_to_read =
std::min<addr_t>(bytes_left, cache_line_bytes_left);
size_t bytes_read = ReadMemory(curr_addr, curr_dst, bytes_to_read, error);
if (bytes_read == 0) {
result_error = error;
dst[total_cstr_len] = '\0';
break;
}
const size_t len = strlen(curr_dst);
total_cstr_len += len;
if (len < bytes_to_read)
break;
curr_dst += bytes_read;
curr_addr += bytes_read;
bytes_left -= bytes_read;
}
} else {
if (dst == nullptr)
result_error.SetErrorString("invalid arguments");
else
result_error.Clear();
}
return total_cstr_len;
}
size_t Process::ReadMemoryFromInferior(addr_t addr, void *buf, size_t size,
Status &error) {
LLDB_SCOPED_TIMER();
if (ABISP abi_sp = GetABI())
addr = abi_sp->FixAnyAddress(addr);
if (buf == nullptr || size == 0)
return 0;
size_t bytes_read = 0;
uint8_t *bytes = (uint8_t *)buf;
while (bytes_read < size) {
const size_t curr_size = size - bytes_read;
const size_t curr_bytes_read =
DoReadMemory(addr + bytes_read, bytes + bytes_read, curr_size, error);
bytes_read += curr_bytes_read;
if (curr_bytes_read == curr_size || curr_bytes_read == 0)
break;
}
// Replace any software breakpoint opcodes that fall into this range back
// into "buf" before we return
if (bytes_read > 0)
RemoveBreakpointOpcodesFromBuffer(addr, bytes_read, (uint8_t *)buf);
return bytes_read;
}
uint64_t Process::ReadUnsignedIntegerFromMemory(lldb::addr_t vm_addr,
size_t integer_byte_size,
uint64_t fail_value,
Status &error) {
Scalar scalar;
if (ReadScalarIntegerFromMemory(vm_addr, integer_byte_size, false, scalar,
error))
return scalar.ULongLong(fail_value);
return fail_value;
}
int64_t Process::ReadSignedIntegerFromMemory(lldb::addr_t vm_addr,
size_t integer_byte_size,
int64_t fail_value,
Status &error) {
Scalar scalar;
if (ReadScalarIntegerFromMemory(vm_addr, integer_byte_size, true, scalar,
error))
return scalar.SLongLong(fail_value);
return fail_value;
}
addr_t Process::ReadPointerFromMemory(lldb::addr_t vm_addr, Status &error) {
Scalar scalar;
if (ReadScalarIntegerFromMemory(vm_addr, GetAddressByteSize(), false, scalar,
error))
return scalar.ULongLong(LLDB_INVALID_ADDRESS);
return LLDB_INVALID_ADDRESS;
}
bool Process::WritePointerToMemory(lldb::addr_t vm_addr, lldb::addr_t ptr_value,
Status &error) {
Scalar scalar;
const uint32_t addr_byte_size = GetAddressByteSize();
if (addr_byte_size <= 4)
scalar = (uint32_t)ptr_value;
else
scalar = ptr_value;
return WriteScalarToMemory(vm_addr, scalar, addr_byte_size, error) ==
addr_byte_size;
}
size_t Process::WriteMemoryPrivate(addr_t addr, const void *buf, size_t size,
Status &error) {
size_t bytes_written = 0;
const uint8_t *bytes = (const uint8_t *)buf;
while (bytes_written < size) {
const size_t curr_size = size - bytes_written;
const size_t curr_bytes_written = DoWriteMemory(
addr + bytes_written, bytes + bytes_written, curr_size, error);
bytes_written += curr_bytes_written;
if (curr_bytes_written == curr_size || curr_bytes_written == 0)
break;
}
return bytes_written;
}
size_t Process::WriteMemory(addr_t addr, const void *buf, size_t size,
Status &error) {
if (ABISP abi_sp = GetABI())
addr = abi_sp->FixAnyAddress(addr);
#if defined(ENABLE_MEMORY_CACHING)
m_memory_cache.Flush(addr, size);
#endif
if (buf == nullptr || size == 0)
return 0;
m_mod_id.BumpMemoryID();
// We need to write any data that would go where any current software traps
// (enabled software breakpoints) any software traps (breakpoints) that we
// may have placed in our tasks memory.
StopPointSiteList<BreakpointSite> bp_sites_in_range;
if (!m_breakpoint_site_list.FindInRange(addr, addr + size, bp_sites_in_range))
return WriteMemoryPrivate(addr, buf, size, error);
// No breakpoint sites overlap
if (bp_sites_in_range.IsEmpty())
return WriteMemoryPrivate(addr, buf, size, error);
const uint8_t *ubuf = (const uint8_t *)buf;
uint64_t bytes_written = 0;
bp_sites_in_range.ForEach([this, addr, size, &bytes_written, &ubuf,
&error](BreakpointSite *bp) -> void {
if (error.Fail())
return;
if (bp->GetType() != BreakpointSite::eSoftware)
return;
addr_t intersect_addr;
size_t intersect_size;
size_t opcode_offset;
const bool intersects = bp->IntersectsRange(
addr, size, &intersect_addr, &intersect_size, &opcode_offset);
UNUSED_IF_ASSERT_DISABLED(intersects);
assert(intersects);
assert(addr <= intersect_addr && intersect_addr < addr + size);
assert(addr < intersect_addr + intersect_size &&
intersect_addr + intersect_size <= addr + size);
assert(opcode_offset + intersect_size <= bp->GetByteSize());
// Check for bytes before this breakpoint
const addr_t curr_addr = addr + bytes_written;
if (intersect_addr > curr_addr) {
// There are some bytes before this breakpoint that we need to just
// write to memory
size_t curr_size = intersect_addr - curr_addr;
size_t curr_bytes_written =
WriteMemoryPrivate(curr_addr, ubuf + bytes_written, curr_size, error);
bytes_written += curr_bytes_written;
if (curr_bytes_written != curr_size) {
// We weren't able to write all of the requested bytes, we are
// done looping and will return the number of bytes that we have
// written so far.
if (error.Success())
error.SetErrorToGenericError();
}
}
// Now write any bytes that would cover up any software breakpoints
// directly into the breakpoint opcode buffer
::memcpy(bp->GetSavedOpcodeBytes() + opcode_offset, ubuf + bytes_written,
intersect_size);
bytes_written += intersect_size;
});
// Write any remaining bytes after the last breakpoint if we have any left
if (bytes_written < size)
bytes_written +=
WriteMemoryPrivate(addr + bytes_written, ubuf + bytes_written,
size - bytes_written, error);
return bytes_written;
}
size_t Process::WriteScalarToMemory(addr_t addr, const Scalar &scalar,
size_t byte_size, Status &error) {
if (byte_size == UINT32_MAX)
byte_size = scalar.GetByteSize();
if (byte_size > 0) {
uint8_t buf[32];
const size_t mem_size =
scalar.GetAsMemoryData(buf, byte_size, GetByteOrder(), error);
if (mem_size > 0)
return WriteMemory(addr, buf, mem_size, error);
else
error.SetErrorString("failed to get scalar as memory data");
} else {
error.SetErrorString("invalid scalar value");
}
return 0;
}
size_t Process::ReadScalarIntegerFromMemory(addr_t addr, uint32_t byte_size,
bool is_signed, Scalar &scalar,
Status &error) {
uint64_t uval = 0;
if (byte_size == 0) {
error.SetErrorString("byte size is zero");
} else if (byte_size & (byte_size - 1)) {
error.SetErrorStringWithFormat("byte size %u is not a power of 2",
byte_size);
} else if (byte_size <= sizeof(uval)) {
const size_t bytes_read = ReadMemory(addr, &uval, byte_size, error);
if (bytes_read == byte_size) {
DataExtractor data(&uval, sizeof(uval), GetByteOrder(),
GetAddressByteSize());
lldb::offset_t offset = 0;
if (byte_size <= 4)
scalar = data.GetMaxU32(&offset, byte_size);
else
scalar = data.GetMaxU64(&offset, byte_size);
if (is_signed)
scalar.SignExtend(byte_size * 8);
return bytes_read;
}
} else {
error.SetErrorStringWithFormat(
"byte size of %u is too large for integer scalar type", byte_size);
}
return 0;
}
Status Process::WriteObjectFile(std::vector<ObjectFile::LoadableData> entries) {
Status error;
for (const auto &Entry : entries) {
WriteMemory(Entry.Dest, Entry.Contents.data(), Entry.Contents.size(),
error);
if (!error.Success())
break;
}
return error;
}
#define USE_ALLOCATE_MEMORY_CACHE 1
addr_t Process::AllocateMemory(size_t size, uint32_t permissions,
Status &error) {
if (GetPrivateState() != eStateStopped) {
error.SetErrorToGenericError();
return LLDB_INVALID_ADDRESS;
}
#if defined(USE_ALLOCATE_MEMORY_CACHE)
return m_allocated_memory_cache.AllocateMemory(size, permissions, error);
#else
addr_t allocated_addr = DoAllocateMemory(size, permissions, error);
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log,
"Process::AllocateMemory(size=%" PRIu64
", permissions=%s) => 0x%16.16" PRIx64
" (m_stop_id = %u m_memory_id = %u)",
(uint64_t)size, GetPermissionsAsCString(permissions),
(uint64_t)allocated_addr, m_mod_id.GetStopID(),
m_mod_id.GetMemoryID());
return allocated_addr;
#endif
}
addr_t Process::CallocateMemory(size_t size, uint32_t permissions,
Status &error) {
addr_t return_addr = AllocateMemory(size, permissions, error);
if (error.Success()) {
std::string buffer(size, 0);
WriteMemory(return_addr, buffer.c_str(), size, error);
}
return return_addr;
}
bool Process::CanJIT() {
if (m_can_jit == eCanJITDontKnow) {
Log *log = GetLog(LLDBLog::Process);
Status err;
uint64_t allocated_memory = AllocateMemory(
8, ePermissionsReadable | ePermissionsWritable | ePermissionsExecutable,
err);
if (err.Success()) {
m_can_jit = eCanJITYes;
LLDB_LOGF(log,
"Process::%s pid %" PRIu64
" allocation test passed, CanJIT () is true",
__FUNCTION__, GetID());
} else {
m_can_jit = eCanJITNo;
LLDB_LOGF(log,
"Process::%s pid %" PRIu64
" allocation test failed, CanJIT () is false: %s",
__FUNCTION__, GetID(), err.AsCString());
}
DeallocateMemory(allocated_memory);
}
return m_can_jit == eCanJITYes;
}
void Process::SetCanJIT(bool can_jit) {
m_can_jit = (can_jit ? eCanJITYes : eCanJITNo);
}
void Process::SetCanRunCode(bool can_run_code) {
SetCanJIT(can_run_code);
m_can_interpret_function_calls = can_run_code;
}
Status Process::DeallocateMemory(addr_t ptr) {
Status error;
#if defined(USE_ALLOCATE_MEMORY_CACHE)
if (!m_allocated_memory_cache.DeallocateMemory(ptr)) {
error.SetErrorStringWithFormat(
"deallocation of memory at 0x%" PRIx64 " failed.", (uint64_t)ptr);
}
#else
error = DoDeallocateMemory(ptr);
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log,
"Process::DeallocateMemory(addr=0x%16.16" PRIx64
") => err = %s (m_stop_id = %u, m_memory_id = %u)",
ptr, error.AsCString("SUCCESS"), m_mod_id.GetStopID(),
m_mod_id.GetMemoryID());
#endif
return error;
}
bool Process::GetWatchpointReportedAfter() {
if (std::optional<bool> subclass_override = DoGetWatchpointReportedAfter())
return *subclass_override;
bool reported_after = true;
const ArchSpec &arch = GetTarget().GetArchitecture();
if (!arch.IsValid())
return reported_after;
llvm::Triple triple = arch.GetTriple();
if (triple.isMIPS() || triple.isPPC64() || triple.isRISCV() ||
triple.isAArch64() || triple.isArmMClass() || triple.isARM())
reported_after = false;
return reported_after;
}
ModuleSP Process::ReadModuleFromMemory(const FileSpec &file_spec,
lldb::addr_t header_addr,
size_t size_to_read) {
Log *log = GetLog(LLDBLog::Host);
if (log) {
LLDB_LOGF(log,
"Process::ReadModuleFromMemory reading %s binary from memory",
file_spec.GetPath().c_str());
}
ModuleSP module_sp(new Module(file_spec, ArchSpec()));
if (module_sp) {
Status error;
ObjectFile *objfile = module_sp->GetMemoryObjectFile(
shared_from_this(), header_addr, error, size_to_read);
if (objfile)
return module_sp;
}
return ModuleSP();
}
bool Process::GetLoadAddressPermissions(lldb::addr_t load_addr,
uint32_t &permissions) {
MemoryRegionInfo range_info;
permissions = 0;
Status error(GetMemoryRegionInfo(load_addr, range_info));
if (!error.Success())
return false;
if (range_info.GetReadable() == MemoryRegionInfo::eDontKnow ||
range_info.GetWritable() == MemoryRegionInfo::eDontKnow ||
range_info.GetExecutable() == MemoryRegionInfo::eDontKnow) {
return false;
}
permissions = range_info.GetLLDBPermissions();
return true;
}
Status Process::EnableWatchpoint(WatchpointSP wp_sp, bool notify) {
Status error;
error.SetErrorString("watchpoints are not supported");
return error;
}
Status Process::DisableWatchpoint(WatchpointSP wp_sp, bool notify) {
Status error;
error.SetErrorString("watchpoints are not supported");
return error;
}
StateType
Process::WaitForProcessStopPrivate(EventSP &event_sp,
const Timeout<std::micro> &timeout) {
StateType state;
while (true) {
event_sp.reset();
state = GetStateChangedEventsPrivate(event_sp, timeout);
if (StateIsStoppedState(state, false))
break;
// If state is invalid, then we timed out
if (state == eStateInvalid)
break;
if (event_sp)
HandlePrivateEvent(event_sp);
}
return state;
}
void Process::LoadOperatingSystemPlugin(bool flush) {
std::lock_guard<std::recursive_mutex> guard(m_thread_mutex);
if (flush)
m_thread_list.Clear();
m_os_up.reset(OperatingSystem::FindPlugin(this, nullptr));
if (flush)
Flush();
}
Status Process::Launch(ProcessLaunchInfo &launch_info) {
StateType state_after_launch = eStateInvalid;
EventSP first_stop_event_sp;
Status status =
LaunchPrivate(launch_info, state_after_launch, first_stop_event_sp);
if (status.Fail())
return status;
if (state_after_launch != eStateStopped &&
state_after_launch != eStateCrashed)
return Status();
// Note, the stop event was consumed above, but not handled. This
// was done to give DidLaunch a chance to run. The target is either
// stopped or crashed. Directly set the state. This is done to
// prevent a stop message with a bunch of spurious output on thread
// status, as well as not pop a ProcessIOHandler.
SetPublicState(state_after_launch, false);
if (PrivateStateThreadIsValid())
ResumePrivateStateThread();
else
StartPrivateStateThread();
// Target was stopped at entry as was intended. Need to notify the
// listeners about it.
if (launch_info.GetFlags().Test(eLaunchFlagStopAtEntry))
HandlePrivateEvent(first_stop_event_sp);
return Status();
}
Status Process::LaunchPrivate(ProcessLaunchInfo &launch_info, StateType &state,
EventSP &event_sp) {
Status error;
m_abi_sp.reset();
m_dyld_up.reset();
m_jit_loaders_up.reset();
m_system_runtime_up.reset();
m_os_up.reset();
{
std::lock_guard<std::mutex> guard(m_process_input_reader_mutex);
m_process_input_reader.reset();
}
Module *exe_module = GetTarget().GetExecutableModulePointer();
// The "remote executable path" is hooked up to the local Executable
// module. But we should be able to debug a remote process even if the
// executable module only exists on the remote. However, there needs to
// be a way to express this path, without actually having a module.
// The way to do that is to set the ExecutableFile in the LaunchInfo.
// Figure that out here:
FileSpec exe_spec_to_use;
if (!exe_module) {
if (!launch_info.GetExecutableFile() && !launch_info.IsScriptedProcess()) {
error.SetErrorString("executable module does not exist");
return error;
}
exe_spec_to_use = launch_info.GetExecutableFile();
} else
exe_spec_to_use = exe_module->GetFileSpec();
if (exe_module && FileSystem::Instance().Exists(exe_module->GetFileSpec())) {
// Install anything that might need to be installed prior to launching.
// For host systems, this will do nothing, but if we are connected to a
// remote platform it will install any needed binaries
error = GetTarget().Install(&launch_info);
if (error.Fail())
return error;
}
// Listen and queue events that are broadcasted during the process launch.
ListenerSP listener_sp(Listener::MakeListener("LaunchEventHijack"));
HijackProcessEvents(listener_sp);
auto on_exit = llvm::make_scope_exit([this]() { RestoreProcessEvents(); });
if (PrivateStateThreadIsValid())
PausePrivateStateThread();
error = WillLaunch(exe_module);
if (error.Fail()) {
std::string local_exec_file_path = exe_spec_to_use.GetPath();
return Status("file doesn't exist: '%s'", local_exec_file_path.c_str());
}
const bool restarted = false;
SetPublicState(eStateLaunching, restarted);
m_should_detach = false;
if (m_public_run_lock.TrySetRunning()) {
// Now launch using these arguments.
error = DoLaunch(exe_module, launch_info);
} else {
// This shouldn't happen
error.SetErrorString("failed to acquire process run lock");
}
if (error.Fail()) {
if (GetID() != LLDB_INVALID_PROCESS_ID) {
SetID(LLDB_INVALID_PROCESS_ID);
const char *error_string = error.AsCString();
if (error_string == nullptr)
error_string = "launch failed";
SetExitStatus(-1, error_string);
}
return error;
}
// Now wait for the process to launch and return control to us, and then
// call DidLaunch:
state = WaitForProcessStopPrivate(event_sp, seconds(10));
if (state == eStateInvalid || !event_sp) {
// We were able to launch the process, but we failed to catch the
// initial stop.
error.SetErrorString("failed to catch stop after launch");
SetExitStatus(0, error.AsCString());
Destroy(false);
return error;
}
if (state == eStateExited) {
// We exited while trying to launch somehow. Don't call DidLaunch
// as that's not likely to work, and return an invalid pid.
HandlePrivateEvent(event_sp);
return Status();
}
if (state == eStateStopped || state == eStateCrashed) {
DidLaunch();
// Now that we know the process type, update its signal responses from the
// ones stored in the Target:
if (m_unix_signals_sp) {
StreamSP warning_strm = GetTarget().GetDebugger().GetAsyncErrorStream();
GetTarget().UpdateSignalsFromDummy(m_unix_signals_sp, warning_strm);
}
DynamicLoader *dyld = GetDynamicLoader();
if (dyld)
dyld->DidLaunch();
GetJITLoaders().DidLaunch();
SystemRuntime *system_runtime = GetSystemRuntime();
if (system_runtime)
system_runtime->DidLaunch();
if (!m_os_up)
LoadOperatingSystemPlugin(false);
// We successfully launched the process and stopped, now it the
// right time to set up signal filters before resuming.
UpdateAutomaticSignalFiltering();
return Status();
}
return Status("Unexpected process state after the launch: %s, expected %s, "
"%s, %s or %s",
StateAsCString(state), StateAsCString(eStateInvalid),
StateAsCString(eStateExited), StateAsCString(eStateStopped),
StateAsCString(eStateCrashed));
}
Status Process::LoadCore() {
Status error = DoLoadCore();
if (error.Success()) {
ListenerSP listener_sp(
Listener::MakeListener("lldb.process.load_core_listener"));
HijackProcessEvents(listener_sp);
if (PrivateStateThreadIsValid())
ResumePrivateStateThread();
else
StartPrivateStateThread();
DynamicLoader *dyld = GetDynamicLoader();
if (dyld)
dyld->DidAttach();
GetJITLoaders().DidAttach();
SystemRuntime *system_runtime = GetSystemRuntime();
if (system_runtime)
system_runtime->DidAttach();
if (!m_os_up)
LoadOperatingSystemPlugin(false);
// We successfully loaded a core file, now pretend we stopped so we can
// show all of the threads in the core file and explore the crashed state.
SetPrivateState(eStateStopped);
// Wait for a stopped event since we just posted one above...
lldb::EventSP event_sp;
StateType state =
WaitForProcessToStop(std::nullopt, &event_sp, true, listener_sp,
nullptr, true, SelectMostRelevantFrame);
if (!StateIsStoppedState(state, false)) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log, "Process::Halt() failed to stop, state is: %s",
StateAsCString(state));
error.SetErrorString(
"Did not get stopped event after loading the core file.");
}
RestoreProcessEvents();
}
return error;
}
DynamicLoader *Process::GetDynamicLoader() {
if (!m_dyld_up)
m_dyld_up.reset(DynamicLoader::FindPlugin(this, ""));
return m_dyld_up.get();
}
void Process::SetDynamicLoader(DynamicLoaderUP dyld_up) {
m_dyld_up = std::move(dyld_up);
}
DataExtractor Process::GetAuxvData() { return DataExtractor(); }
llvm::Expected<bool> Process::SaveCore(llvm::StringRef outfile) {
return false;
}
JITLoaderList &Process::GetJITLoaders() {
if (!m_jit_loaders_up) {
m_jit_loaders_up = std::make_unique<JITLoaderList>();
JITLoader::LoadPlugins(this, *m_jit_loaders_up);
}
return *m_jit_loaders_up;
}
SystemRuntime *Process::GetSystemRuntime() {
if (!m_system_runtime_up)
m_system_runtime_up.reset(SystemRuntime::FindPlugin(this));
return m_system_runtime_up.get();
}
Process::AttachCompletionHandler::AttachCompletionHandler(Process *process,
uint32_t exec_count)
: NextEventAction(process), m_exec_count(exec_count) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(
log,
"Process::AttachCompletionHandler::%s process=%p, exec_count=%" PRIu32,
__FUNCTION__, static_cast<void *>(process), exec_count);
}
Process::NextEventAction::EventActionResult
Process::AttachCompletionHandler::PerformAction(lldb::EventSP &event_sp) {
Log *log = GetLog(LLDBLog::Process);
StateType state = ProcessEventData::GetStateFromEvent(event_sp.get());
LLDB_LOGF(log,
"Process::AttachCompletionHandler::%s called with state %s (%d)",
__FUNCTION__, StateAsCString(state), static_cast<int>(state));
switch (state) {
case eStateAttaching:
return eEventActionSuccess;
case eStateRunning:
case eStateConnected:
return eEventActionRetry;
case eStateStopped:
case eStateCrashed:
// During attach, prior to sending the eStateStopped event,
// lldb_private::Process subclasses must set the new process ID.
assert(m_process->GetID() != LLDB_INVALID_PROCESS_ID);
// We don't want these events to be reported, so go set the
// ShouldReportStop here:
m_process->GetThreadList().SetShouldReportStop(eVoteNo);
if (m_exec_count > 0) {
--m_exec_count;
LLDB_LOGF(log,
"Process::AttachCompletionHandler::%s state %s: reduced "
"remaining exec count to %" PRIu32 ", requesting resume",
__FUNCTION__, StateAsCString(state), m_exec_count);
RequestResume();
return eEventActionRetry;
} else {
LLDB_LOGF(log,
"Process::AttachCompletionHandler::%s state %s: no more "
"execs expected to start, continuing with attach",
__FUNCTION__, StateAsCString(state));
m_process->CompleteAttach();
return eEventActionSuccess;
}
break;
default:
case eStateExited:
case eStateInvalid:
break;
}
m_exit_string.assign("No valid Process");
return eEventActionExit;
}
Process::NextEventAction::EventActionResult
Process::AttachCompletionHandler::HandleBeingInterrupted() {
return eEventActionSuccess;
}
const char *Process::AttachCompletionHandler::GetExitString() {
return m_exit_string.c_str();
}
ListenerSP ProcessAttachInfo::GetListenerForProcess(Debugger &debugger) {
if (m_listener_sp)
return m_listener_sp;
else
return debugger.GetListener();
}
Status Process::WillLaunch(Module *module) {
return DoWillLaunch(module);
}
Status Process::WillAttachToProcessWithID(lldb::pid_t pid) {
return DoWillAttachToProcessWithID(pid);
}
Status Process::WillAttachToProcessWithName(const char *process_name,
bool wait_for_launch) {
return DoWillAttachToProcessWithName(process_name, wait_for_launch);
}
Status Process::Attach(ProcessAttachInfo &attach_info) {
m_abi_sp.reset();
{
std::lock_guard<std::mutex> guard(m_process_input_reader_mutex);
m_process_input_reader.reset();
}
m_dyld_up.reset();
m_jit_loaders_up.reset();
m_system_runtime_up.reset();
m_os_up.reset();
lldb::pid_t attach_pid = attach_info.GetProcessID();
Status error;
if (attach_pid == LLDB_INVALID_PROCESS_ID) {
char process_name[PATH_MAX];
if (attach_info.GetExecutableFile().GetPath(process_name,
sizeof(process_name))) {
const bool wait_for_launch = attach_info.GetWaitForLaunch();
if (wait_for_launch) {
error = WillAttachToProcessWithName(process_name, wait_for_launch);
if (error.Success()) {
if (m_public_run_lock.TrySetRunning()) {
m_should_detach = true;
const bool restarted = false;
SetPublicState(eStateAttaching, restarted);
// Now attach using these arguments.
error = DoAttachToProcessWithName(process_name, attach_info);
} else {
// This shouldn't happen
error.SetErrorString("failed to acquire process run lock");
}
if (error.Fail()) {
if (GetID() != LLDB_INVALID_PROCESS_ID) {
SetID(LLDB_INVALID_PROCESS_ID);
if (error.AsCString() == nullptr)
error.SetErrorString("attach failed");
SetExitStatus(-1, error.AsCString());
}
} else {
SetNextEventAction(new Process::AttachCompletionHandler(
this, attach_info.GetResumeCount()));
StartPrivateStateThread();
}
return error;
}
} else {
ProcessInstanceInfoList process_infos;
PlatformSP platform_sp(GetTarget().GetPlatform());
if (platform_sp) {
ProcessInstanceInfoMatch match_info;
match_info.GetProcessInfo() = attach_info;
match_info.SetNameMatchType(NameMatch::Equals);
platform_sp->FindProcesses(match_info, process_infos);
const uint32_t num_matches = process_infos.size();
if (num_matches == 1) {
attach_pid = process_infos[0].GetProcessID();
// Fall through and attach using the above process ID
} else {
match_info.GetProcessInfo().GetExecutableFile().GetPath(
process_name, sizeof(process_name));
if (num_matches > 1) {
StreamString s;
ProcessInstanceInfo::DumpTableHeader(s, true, false);
for (size_t i = 0; i < num_matches; i++) {
process_infos[i].DumpAsTableRow(
s, platform_sp->GetUserIDResolver(), true, false);
}
error.SetErrorStringWithFormat(
"more than one process named %s:\n%s", process_name,
s.GetData());
} else
error.SetErrorStringWithFormat(
"could not find a process named %s", process_name);
}
} else {
error.SetErrorString(
"invalid platform, can't find processes by name");
return error;
}
}
} else {
error.SetErrorString("invalid process name");
}
}
if (attach_pid != LLDB_INVALID_PROCESS_ID) {
error = WillAttachToProcessWithID(attach_pid);
if (error.Success()) {
if (m_public_run_lock.TrySetRunning()) {
// Now attach using these arguments.
m_should_detach = true;
const bool restarted = false;
SetPublicState(eStateAttaching, restarted);
error = DoAttachToProcessWithID(attach_pid, attach_info);
} else {
// This shouldn't happen
error.SetErrorString("failed to acquire process run lock");
}
if (error.Success()) {
SetNextEventAction(new Process::AttachCompletionHandler(
this, attach_info.GetResumeCount()));
StartPrivateStateThread();
} else {
if (GetID() != LLDB_INVALID_PROCESS_ID)
SetID(LLDB_INVALID_PROCESS_ID);
const char *error_string = error.AsCString();
if (error_string == nullptr)
error_string = "attach failed";
SetExitStatus(-1, error_string);
}
}
}
return error;
}
void Process::CompleteAttach() {
Log *log(GetLog(LLDBLog::Process | LLDBLog::Target));
LLDB_LOGF(log, "Process::%s()", __FUNCTION__);
// Let the process subclass figure out at much as it can about the process
// before we go looking for a dynamic loader plug-in.
ArchSpec process_arch;
DidAttach(process_arch);
if (process_arch.IsValid()) {
LLDB_LOG(log,
"Process::{0} replacing process architecture with DidAttach() "
"architecture: \"{1}\"",
__FUNCTION__, process_arch.GetTriple().getTriple());
GetTarget().SetArchitecture(process_arch);
}
// We just attached. If we have a platform, ask it for the process
// architecture, and if it isn't the same as the one we've already set,
// switch architectures.
PlatformSP platform_sp(GetTarget().GetPlatform());
assert(platform_sp);
ArchSpec process_host_arch = GetSystemArchitecture();
if (platform_sp) {
const ArchSpec &target_arch = GetTarget().GetArchitecture();
if (target_arch.IsValid() && !platform_sp->IsCompatibleArchitecture(
target_arch, process_host_arch,
ArchSpec::CompatibleMatch, nullptr)) {
ArchSpec platform_arch;
platform_sp = GetTarget().GetDebugger().GetPlatformList().GetOrCreate(
target_arch, process_host_arch, &platform_arch);
if (platform_sp) {
GetTarget().SetPlatform(platform_sp);
GetTarget().SetArchitecture(platform_arch);
LLDB_LOG(log,
"switching platform to {0} and architecture to {1} based on "
"info from attach",
platform_sp->GetName(), platform_arch.GetTriple().getTriple());
}
} else if (!process_arch.IsValid()) {
ProcessInstanceInfo process_info;
GetProcessInfo(process_info);
const ArchSpec &process_arch = process_info.GetArchitecture();
const ArchSpec &target_arch = GetTarget().GetArchitecture();
if (process_arch.IsValid() &&
target_arch.IsCompatibleMatch(process_arch) &&
!target_arch.IsExactMatch(process_arch)) {
GetTarget().SetArchitecture(process_arch);
LLDB_LOGF(log,
"Process::%s switching architecture to %s based on info "
"the platform retrieved for pid %" PRIu64,
__FUNCTION__, process_arch.GetTriple().getTriple().c_str(),
GetID());
}
}
}
// Now that we know the process type, update its signal responses from the
// ones stored in the Target:
if (m_unix_signals_sp) {
StreamSP warning_strm = GetTarget().GetDebugger().GetAsyncErrorStream();
GetTarget().UpdateSignalsFromDummy(m_unix_signals_sp, warning_strm);
}
// We have completed the attach, now it is time to find the dynamic loader
// plug-in
DynamicLoader *dyld = GetDynamicLoader();
if (dyld) {
dyld->DidAttach();
if (log) {
ModuleSP exe_module_sp = GetTarget().GetExecutableModule();
LLDB_LOG(log,
"after DynamicLoader::DidAttach(), target "
"executable is {0} (using {1} plugin)",
exe_module_sp ? exe_module_sp->GetFileSpec() : FileSpec(),
dyld->GetPluginName());
}
}
GetJITLoaders().DidAttach();
SystemRuntime *system_runtime = GetSystemRuntime();
if (system_runtime) {
system_runtime->DidAttach();
if (log) {
ModuleSP exe_module_sp = GetTarget().GetExecutableModule();
LLDB_LOG(log,
"after SystemRuntime::DidAttach(), target "
"executable is {0} (using {1} plugin)",
exe_module_sp ? exe_module_sp->GetFileSpec() : FileSpec(),
system_runtime->GetPluginName());
}
}
if (!m_os_up) {
LoadOperatingSystemPlugin(false);
if (m_os_up) {
// Somebody might have gotten threads before now, but we need to force the
// update after we've loaded the OperatingSystem plugin or it won't get a
// chance to process the threads.
m_thread_list.Clear();
UpdateThreadListIfNeeded();
}
}
// Figure out which one is the executable, and set that in our target:
ModuleSP new_executable_module_sp;
for (ModuleSP module_sp : GetTarget().GetImages().Modules()) {
if (module_sp && module_sp->IsExecutable()) {
if (GetTarget().GetExecutableModulePointer() != module_sp.get())
new_executable_module_sp = module_sp;
break;
}
}
if (new_executable_module_sp) {
GetTarget().SetExecutableModule(new_executable_module_sp,
eLoadDependentsNo);
if (log) {
ModuleSP exe_module_sp = GetTarget().GetExecutableModule();
LLDB_LOGF(
log,
"Process::%s after looping through modules, target executable is %s",
__FUNCTION__,
exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str()
: "<none>");
}
}
}
Status Process::ConnectRemote(llvm::StringRef remote_url) {
m_abi_sp.reset();
{
std::lock_guard<std::mutex> guard(m_process_input_reader_mutex);
m_process_input_reader.reset();
}
// Find the process and its architecture. Make sure it matches the
// architecture of the current Target, and if not adjust it.
Status error(DoConnectRemote(remote_url));
if (error.Success()) {
if (GetID() != LLDB_INVALID_PROCESS_ID) {
EventSP event_sp;
StateType state = WaitForProcessStopPrivate(event_sp, std::nullopt);
if (state == eStateStopped || state == eStateCrashed) {
// If we attached and actually have a process on the other end, then
// this ended up being the equivalent of an attach.
CompleteAttach();
// This delays passing the stopped event to listeners till
// CompleteAttach gets a chance to complete...
HandlePrivateEvent(event_sp);
}
}
if (PrivateStateThreadIsValid())
ResumePrivateStateThread();
else
StartPrivateStateThread();
}
return error;
}
Status Process::PrivateResume() {
Log *log(GetLog(LLDBLog::Process | LLDBLog::Step));
LLDB_LOGF(log,
"Process::PrivateResume() m_stop_id = %u, public state: %s "
"private state: %s",
m_mod_id.GetStopID(), StateAsCString(m_public_state.GetValue()),
StateAsCString(m_private_state.GetValue()));
// If signals handing status changed we might want to update our signal
// filters before resuming.
UpdateAutomaticSignalFiltering();
Status error(WillResume());
// Tell the process it is about to resume before the thread list
if (error.Success()) {
// Now let the thread list know we are about to resume so it can let all of
// our threads know that they are about to be resumed. Threads will each be
// called with Thread::WillResume(StateType) where StateType contains the
// state that they are supposed to have when the process is resumed
// (suspended/running/stepping). Threads should also check their resume
// signal in lldb::Thread::GetResumeSignal() to see if they are supposed to
// start back up with a signal.
if (m_thread_list.WillResume()) {
// Last thing, do the PreResumeActions.
if (!RunPreResumeActions()) {
error.SetErrorString(
"Process::PrivateResume PreResumeActions failed, not resuming.");
} else {
m_mod_id.BumpResumeID();
error = DoResume();
if (error.Success()) {
DidResume();
m_thread_list.DidResume();
LLDB_LOGF(log, "Process thinks the process has resumed.");
} else {
LLDB_LOGF(log, "Process::PrivateResume() DoResume failed.");
return error;
}
}
} else {
// Somebody wanted to run without running (e.g. we were faking a step
// from one frame of a set of inlined frames that share the same PC to
// another.) So generate a continue & a stopped event, and let the world
// handle them.
LLDB_LOGF(log,
"Process::PrivateResume() asked to simulate a start & stop.");
SetPrivateState(eStateRunning);
SetPrivateState(eStateStopped);
}
} else
LLDB_LOGF(log, "Process::PrivateResume() got an error \"%s\".",
error.AsCString("<unknown error>"));
return error;
}
Status Process::Halt(bool clear_thread_plans, bool use_run_lock) {
if (!StateIsRunningState(m_public_state.GetValue()))
return Status("Process is not running.");
// Don't clear the m_clear_thread_plans_on_stop, only set it to true if in
// case it was already set and some thread plan logic calls halt on its own.
m_clear_thread_plans_on_stop |= clear_thread_plans;
ListenerSP halt_listener_sp(
Listener::MakeListener("lldb.process.halt_listener"));
HijackProcessEvents(halt_listener_sp);
EventSP event_sp;
SendAsyncInterrupt();
if (m_public_state.GetValue() == eStateAttaching) {
// Don't hijack and eat the eStateExited as the code that was doing the
// attach will be waiting for this event...
RestoreProcessEvents();
Destroy(false);
SetExitStatus(SIGKILL, "Cancelled async attach.");
return Status();
}
// Wait for the process halt timeout seconds for the process to stop.
// If we are going to use the run lock, that means we're stopping out to the
// user, so we should also select the most relevant frame.
SelectMostRelevant select_most_relevant =
use_run_lock ? SelectMostRelevantFrame : DoNoSelectMostRelevantFrame;
StateType state = WaitForProcessToStop(GetInterruptTimeout(), &event_sp, true,
halt_listener_sp, nullptr,
use_run_lock, select_most_relevant);
RestoreProcessEvents();
if (state == eStateInvalid || !event_sp) {
// We timed out and didn't get a stop event...
return Status("Halt timed out. State = %s", StateAsCString(GetState()));
}
BroadcastEvent(event_sp);
return Status();
}
Status Process::StopForDestroyOrDetach(lldb::EventSP &exit_event_sp) {
Status error;
// Check both the public & private states here. If we're hung evaluating an
// expression, for instance, then the public state will be stopped, but we
// still need to interrupt.
if (m_public_state.GetValue() == eStateRunning ||
m_private_state.GetValue() == eStateRunning) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log, "Process::%s() About to stop.", __FUNCTION__);
ListenerSP listener_sp(
Listener::MakeListener("lldb.Process.StopForDestroyOrDetach.hijack"));
HijackProcessEvents(listener_sp);
SendAsyncInterrupt();
// Consume the interrupt event.
StateType state = WaitForProcessToStop(GetInterruptTimeout(),
&exit_event_sp, true, listener_sp);
RestoreProcessEvents();
// If the process exited while we were waiting for it to stop, put the
// exited event into the shared pointer passed in and return. Our caller
// doesn't need to do anything else, since they don't have a process
// anymore...
if (state == eStateExited || m_private_state.GetValue() == eStateExited) {
LLDB_LOGF(log, "Process::%s() Process exited while waiting to stop.",
__FUNCTION__);
return error;
} else
exit_event_sp.reset(); // It is ok to consume any non-exit stop events
if (state != eStateStopped) {
LLDB_LOGF(log, "Process::%s() failed to stop, state is: %s", __FUNCTION__,
StateAsCString(state));
// If we really couldn't stop the process then we should just error out
// here, but if the lower levels just bobbled sending the event and we
// really are stopped, then continue on.
StateType private_state = m_private_state.GetValue();
if (private_state != eStateStopped) {
return Status(
"Attempt to stop the target in order to detach timed out. "
"State = %s",
StateAsCString(GetState()));
}
}
}
return error;
}
Status Process::Detach(bool keep_stopped) {
EventSP exit_event_sp;
Status error;
m_destroy_in_process = true;
error = WillDetach();
if (error.Success()) {
if (DetachRequiresHalt()) {
error = StopForDestroyOrDetach(exit_event_sp);
if (!error.Success()) {
m_destroy_in_process = false;
return error;
} else if (exit_event_sp) {
// We shouldn't need to do anything else here. There's no process left
// to detach from...
StopPrivateStateThread();
m_destroy_in_process = false;
return error;
}
}
m_thread_list.DiscardThreadPlans();
DisableAllBreakpointSites();
error = DoDetach(keep_stopped);
if (error.Success()) {
DidDetach();
StopPrivateStateThread();
} else {
return error;
}
}
m_destroy_in_process = false;
// If we exited when we were waiting for a process to stop, then forward the
// event here so we don't lose the event
if (exit_event_sp) {
// Directly broadcast our exited event because we shut down our private
// state thread above
BroadcastEvent(exit_event_sp);
}
// If we have been interrupted (to kill us) in the middle of running, we may
// not end up propagating the last events through the event system, in which
// case we might strand the write lock. Unlock it here so when we do to tear
// down the process we don't get an error destroying the lock.
m_public_run_lock.SetStopped();
return error;
}
Status Process::Destroy(bool force_kill) {
// If we've already called Process::Finalize then there's nothing useful to
// be done here. Finalize has actually called Destroy already.
if (m_finalizing)
return {};
return DestroyImpl(force_kill);
}
Status Process::DestroyImpl(bool force_kill) {
// Tell ourselves we are in the process of destroying the process, so that we
// don't do any unnecessary work that might hinder the destruction. Remember
// to set this back to false when we are done. That way if the attempt
// failed and the process stays around for some reason it won't be in a
// confused state.
if (force_kill)
m_should_detach = false;
if (GetShouldDetach()) {
// FIXME: This will have to be a process setting:
bool keep_stopped = false;
Detach(keep_stopped);
}
m_destroy_in_process = true;
Status error(WillDestroy());
if (error.Success()) {
EventSP exit_event_sp;
if (DestroyRequiresHalt()) {
error = StopForDestroyOrDetach(exit_event_sp);
}
if (m_public_state.GetValue() == eStateStopped) {
// Ditch all thread plans, and remove all our breakpoints: in case we
// have to restart the target to kill it, we don't want it hitting a
// breakpoint... Only do this if we've stopped, however, since if we
// didn't manage to halt it above, then we're not going to have much luck
// doing this now.
m_thread_list.DiscardThreadPlans();
DisableAllBreakpointSites();
}
error = DoDestroy();
if (error.Success()) {
DidDestroy();
StopPrivateStateThread();
}
m_stdio_communication.StopReadThread();
m_stdio_communication.Disconnect();
m_stdin_forward = false;
{
std::lock_guard<std::mutex> guard(m_process_input_reader_mutex);
if (m_process_input_reader) {
m_process_input_reader->SetIsDone(true);
m_process_input_reader->Cancel();
m_process_input_reader.reset();
}
}
// If we exited when we were waiting for a process to stop, then forward
// the event here so we don't lose the event
if (exit_event_sp) {
// Directly broadcast our exited event because we shut down our private
// state thread above
BroadcastEvent(exit_event_sp);
}
// If we have been interrupted (to kill us) in the middle of running, we
// may not end up propagating the last events through the event system, in
// which case we might strand the write lock. Unlock it here so when we do
// to tear down the process we don't get an error destroying the lock.
m_public_run_lock.SetStopped();
}
m_destroy_in_process = false;
return error;
}
Status Process::Signal(int signal) {
Status error(WillSignal());
if (error.Success()) {
error = DoSignal(signal);
if (error.Success())
DidSignal();
}
return error;
}
void Process::SetUnixSignals(UnixSignalsSP &&signals_sp) {
assert(signals_sp && "null signals_sp");
m_unix_signals_sp = std::move(signals_sp);
}
const lldb::UnixSignalsSP &Process::GetUnixSignals() {
assert(m_unix_signals_sp && "null m_unix_signals_sp");
return m_unix_signals_sp;
}
lldb::ByteOrder Process::GetByteOrder() const {
return GetTarget().GetArchitecture().GetByteOrder();
}
uint32_t Process::GetAddressByteSize() const {
return GetTarget().GetArchitecture().GetAddressByteSize();
}
bool Process::ShouldBroadcastEvent(Event *event_ptr) {
const StateType state =
Process::ProcessEventData::GetStateFromEvent(event_ptr);
bool return_value = true;
Log *log(GetLog(LLDBLog::Events | LLDBLog::Process));
switch (state) {
case eStateDetached:
case eStateExited:
case eStateUnloaded:
m_stdio_communication.SynchronizeWithReadThread();
m_stdio_communication.StopReadThread();
m_stdio_communication.Disconnect();
m_stdin_forward = false;
[[fallthrough]];
case eStateConnected:
case eStateAttaching:
case eStateLaunching:
// These events indicate changes in the state of the debugging session,
// always report them.
return_value = true;
break;
case eStateInvalid:
// We stopped for no apparent reason, don't report it.
return_value = false;
break;
case eStateRunning:
case eStateStepping:
// If we've started the target running, we handle the cases where we are
// already running and where there is a transition from stopped to running
// differently. running -> running: Automatically suppress extra running
// events stopped -> running: Report except when there is one or more no
// votes
// and no yes votes.
SynchronouslyNotifyStateChanged(state);
if (m_force_next_event_delivery)
return_value = true;
else {
switch (m_last_broadcast_state) {
case eStateRunning:
case eStateStepping:
// We always suppress multiple runnings with no PUBLIC stop in between.
return_value = false;
break;
default:
// TODO: make this work correctly. For now always report
// run if we aren't running so we don't miss any running events. If I
// run the lldb/test/thread/a.out file and break at main.cpp:58, run
// and hit the breakpoints on multiple threads, then somehow during the
// stepping over of all breakpoints no run gets reported.
// This is a transition from stop to run.
switch (m_thread_list.ShouldReportRun(event_ptr)) {
case eVoteYes:
case eVoteNoOpinion:
return_value = true;
break;
case eVoteNo:
return_value = false;
break;
}
break;
}
}
break;
case eStateStopped:
case eStateCrashed:
case eStateSuspended:
// We've stopped. First see if we're going to restart the target. If we
// are going to stop, then we always broadcast the event. If we aren't
// going to stop, let the thread plans decide if we're going to report this
// event. If no thread has an opinion, we don't report it.
m_stdio_communication.SynchronizeWithReadThread();
RefreshStateAfterStop();
if (ProcessEventData::GetInterruptedFromEvent(event_ptr)) {
LLDB_LOGF(log,
"Process::ShouldBroadcastEvent (%p) stopped due to an "
"interrupt, state: %s",
static_cast<void *>(event_ptr), StateAsCString(state));
// Even though we know we are going to stop, we should let the threads
// have a look at the stop, so they can properly set their state.
m_thread_list.ShouldStop(event_ptr);
return_value = true;
} else {
bool was_restarted = ProcessEventData::GetRestartedFromEvent(event_ptr);
bool should_resume = false;
// It makes no sense to ask "ShouldStop" if we've already been
// restarted... Asking the thread list is also not likely to go well,
// since we are running again. So in that case just report the event.
if (!was_restarted)
should_resume = !m_thread_list.ShouldStop(event_ptr);
if (was_restarted || should_resume || m_resume_requested) {
Vote report_stop_vote = m_thread_list.ShouldReportStop(event_ptr);
LLDB_LOGF(log,
"Process::ShouldBroadcastEvent: should_resume: %i state: "
"%s was_restarted: %i report_stop_vote: %d.",
should_resume, StateAsCString(state), was_restarted,
report_stop_vote);
switch (report_stop_vote) {
case eVoteYes:
return_value = true;
break;
case eVoteNoOpinion:
case eVoteNo:
return_value = false;
break;
}
if (!was_restarted) {
LLDB_LOGF(log,
"Process::ShouldBroadcastEvent (%p) Restarting process "
"from state: %s",
static_cast<void *>(event_ptr), StateAsCString(state));
ProcessEventData::SetRestartedInEvent(event_ptr, true);
PrivateResume();
}
} else {
return_value = true;
SynchronouslyNotifyStateChanged(state);
}
}
break;
}
// Forcing the next event delivery is a one shot deal. So reset it here.
m_force_next_event_delivery = false;
// We do some coalescing of events (for instance two consecutive running
// events get coalesced.) But we only coalesce against events we actually
// broadcast. So we use m_last_broadcast_state to track that. NB - you
// can't use "m_public_state.GetValue()" for that purpose, as was originally
// done, because the PublicState reflects the last event pulled off the
// queue, and there may be several events stacked up on the queue unserviced.
// So the PublicState may not reflect the last broadcasted event yet.
// m_last_broadcast_state gets updated here.
if (return_value)
m_last_broadcast_state = state;
LLDB_LOGF(log,
"Process::ShouldBroadcastEvent (%p) => new state: %s, last "
"broadcast state: %s - %s",
static_cast<void *>(event_ptr), StateAsCString(state),
StateAsCString(m_last_broadcast_state),
return_value ? "YES" : "NO");
return return_value;
}
bool Process::StartPrivateStateThread(bool is_secondary_thread) {
Log *log = GetLog(LLDBLog::Events);
bool already_running = PrivateStateThreadIsValid();
LLDB_LOGF(log, "Process::%s()%s ", __FUNCTION__,
already_running ? " already running"
: " starting private state thread");
if (!is_secondary_thread && already_running)
return true;
// Create a thread that watches our internal state and controls which events
// make it to clients (into the DCProcess event queue).
char thread_name[1024];
uint32_t max_len = llvm::get_max_thread_name_length();
if (max_len > 0 && max_len <= 30) {
// On platforms with abbreviated thread name lengths, choose thread names
// that fit within the limit.
if (already_running)
snprintf(thread_name, sizeof(thread_name), "intern-state-OV");
else
snprintf(thread_name, sizeof(thread_name), "intern-state");
} else {
if (already_running)
snprintf(thread_name, sizeof(thread_name),
"<lldb.process.internal-state-override(pid=%" PRIu64 ")>",
GetID());
else
snprintf(thread_name, sizeof(thread_name),
"<lldb.process.internal-state(pid=%" PRIu64 ")>", GetID());
}
llvm::Expected<HostThread> private_state_thread =
ThreadLauncher::LaunchThread(
thread_name,
[this, is_secondary_thread] {
return RunPrivateStateThread(is_secondary_thread);
},
8 * 1024 * 1024);
if (!private_state_thread) {
LLDB_LOG_ERROR(GetLog(LLDBLog::Host), private_state_thread.takeError(),
"failed to launch host thread: {0}");
return false;
}
assert(private_state_thread->IsJoinable());
m_private_state_thread = *private_state_thread;
ResumePrivateStateThread();
return true;
}
void Process::PausePrivateStateThread() {
ControlPrivateStateThread(eBroadcastInternalStateControlPause);
}
void Process::ResumePrivateStateThread() {
ControlPrivateStateThread(eBroadcastInternalStateControlResume);
}
void Process::StopPrivateStateThread() {
if (m_private_state_thread.IsJoinable())
ControlPrivateStateThread(eBroadcastInternalStateControlStop);
else {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(
log,
"Went to stop the private state thread, but it was already invalid.");
}
}
void Process::ControlPrivateStateThread(uint32_t signal) {
Log *log = GetLog(LLDBLog::Process);
assert(signal == eBroadcastInternalStateControlStop ||
signal == eBroadcastInternalStateControlPause ||
signal == eBroadcastInternalStateControlResume);
LLDB_LOGF(log, "Process::%s (signal = %d)", __FUNCTION__, signal);
// Signal the private state thread
if (m_private_state_thread.IsJoinable()) {
// Broadcast the event.
// It is important to do this outside of the if below, because it's
// possible that the thread state is invalid but that the thread is waiting
// on a control event instead of simply being on its way out (this should
// not happen, but it apparently can).
LLDB_LOGF(log, "Sending control event of type: %d.", signal);
std::shared_ptr<EventDataReceipt> event_receipt_sp(new EventDataReceipt());
m_private_state_control_broadcaster.BroadcastEvent(signal,
event_receipt_sp);
// Wait for the event receipt or for the private state thread to exit
bool receipt_received = false;
if (PrivateStateThreadIsValid()) {
while (!receipt_received) {
// Check for a receipt for n seconds and then check if the private
// state thread is still around.
receipt_received =
event_receipt_sp->WaitForEventReceived(GetUtilityExpressionTimeout());
if (!receipt_received) {
// Check if the private state thread is still around. If it isn't
// then we are done waiting
if (!PrivateStateThreadIsValid())
break; // Private state thread exited or is exiting, we are done
}
}
}
if (signal == eBroadcastInternalStateControlStop) {
thread_result_t result = {};
m_private_state_thread.Join(&result);
m_private_state_thread.Reset();
}
} else {
LLDB_LOGF(
log,
"Private state thread already dead, no need to signal it to stop.");
}
}
void Process::SendAsyncInterrupt() {
if (PrivateStateThreadIsValid())
m_private_state_broadcaster.BroadcastEvent(Process::eBroadcastBitInterrupt,
nullptr);
else
BroadcastEvent(Process::eBroadcastBitInterrupt, nullptr);
}
void Process::HandlePrivateEvent(EventSP &event_sp) {
Log *log = GetLog(LLDBLog::Process);
m_resume_requested = false;
const StateType new_state =
Process::ProcessEventData::GetStateFromEvent(event_sp.get());
// First check to see if anybody wants a shot at this event:
if (m_next_event_action_up) {
NextEventAction::EventActionResult action_result =
m_next_event_action_up->PerformAction(event_sp);
LLDB_LOGF(log, "Ran next event action, result was %d.", action_result);
switch (action_result) {
case NextEventAction::eEventActionSuccess:
SetNextEventAction(nullptr);
break;
case NextEventAction::eEventActionRetry:
break;
case NextEventAction::eEventActionExit:
// Handle Exiting Here. If we already got an exited event, we should
// just propagate it. Otherwise, swallow this event, and set our state
// to exit so the next event will kill us.
if (new_state != eStateExited) {
// FIXME: should cons up an exited event, and discard this one.
SetExitStatus(0, m_next_event_action_up->GetExitString());
SetNextEventAction(nullptr);
return;
}
SetNextEventAction(nullptr);
break;
}
}
// See if we should broadcast this state to external clients?
const bool should_broadcast = ShouldBroadcastEvent(event_sp.get());
if (should_broadcast) {
const bool is_hijacked = IsHijackedForEvent(eBroadcastBitStateChanged);
if (log) {
LLDB_LOGF(log,
"Process::%s (pid = %" PRIu64
") broadcasting new state %s (old state %s) to %s",
__FUNCTION__, GetID(), StateAsCString(new_state),
StateAsCString(GetState()),
is_hijacked ? "hijacked" : "public");
}
Process::ProcessEventData::SetUpdateStateOnRemoval(event_sp.get());
if (StateIsRunningState(new_state)) {
// Only push the input handler if we aren't fowarding events, as this
// means the curses GUI is in use... Or don't push it if we are launching
// since it will come up stopped.
if (!GetTarget().GetDebugger().IsForwardingEvents() &&
new_state != eStateLaunching && new_state != eStateAttaching) {
PushProcessIOHandler();
m_iohandler_sync.SetValue(m_iohandler_sync.GetValue() + 1,
eBroadcastAlways);
LLDB_LOGF(log, "Process::%s updated m_iohandler_sync to %d",
__FUNCTION__, m_iohandler_sync.GetValue());
}
} else if (StateIsStoppedState(new_state, false)) {
if (!Process::ProcessEventData::GetRestartedFromEvent(event_sp.get())) {
// If the lldb_private::Debugger is handling the events, we don't want
// to pop the process IOHandler here, we want to do it when we receive
// the stopped event so we can carefully control when the process
// IOHandler is popped because when we stop we want to display some
// text stating how and why we stopped, then maybe some
// process/thread/frame info, and then we want the "(lldb) " prompt to
// show up. If we pop the process IOHandler here, then we will cause
// the command interpreter to become the top IOHandler after the
// process pops off and it will update its prompt right away... See the
// Debugger.cpp file where it calls the function as
// "process_sp->PopProcessIOHandler()" to see where I am talking about.
// Otherwise we end up getting overlapping "(lldb) " prompts and
// garbled output.
//
// If we aren't handling the events in the debugger (which is indicated
// by "m_target.GetDebugger().IsHandlingEvents()" returning false) or
// we are hijacked, then we always pop the process IO handler manually.
// Hijacking happens when the internal process state thread is running
// thread plans, or when commands want to run in synchronous mode and
// they call "process->WaitForProcessToStop()". An example of something
// that will hijack the events is a simple expression:
//
// (lldb) expr (int)puts("hello")
//
// This will cause the internal process state thread to resume and halt
// the process (and _it_ will hijack the eBroadcastBitStateChanged
// events) and we do need the IO handler to be pushed and popped
// correctly.
if (is_hijacked || !GetTarget().GetDebugger().IsHandlingEvents())
PopProcessIOHandler();
}
}
BroadcastEvent(event_sp);
} else {
if (log) {
LLDB_LOGF(
log,
"Process::%s (pid = %" PRIu64
") suppressing state %s (old state %s): should_broadcast == false",
__FUNCTION__, GetID(), StateAsCString(new_state),
StateAsCString(GetState()));
}
}
}
Status Process::HaltPrivate() {
EventSP event_sp;
Status error(WillHalt());
if (error.Fail())
return error;
// Ask the process subclass to actually halt our process
bool caused_stop;
error = DoHalt(caused_stop);
DidHalt();
return error;
}
thread_result_t Process::RunPrivateStateThread(bool is_secondary_thread) {
bool control_only = true;
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log, "Process::%s (arg = %p, pid = %" PRIu64 ") thread starting...",
__FUNCTION__, static_cast<void *>(this), GetID());
bool exit_now = false;
bool interrupt_requested = false;
while (!exit_now) {
EventSP event_sp;
GetEventsPrivate(event_sp, std::nullopt, control_only);
if (event_sp->BroadcasterIs(&m_private_state_control_broadcaster)) {
LLDB_LOGF(log,
"Process::%s (arg = %p, pid = %" PRIu64
") got a control event: %d",
__FUNCTION__, static_cast<void *>(this), GetID(),
event_sp->GetType());
switch (event_sp->GetType()) {
case eBroadcastInternalStateControlStop:
exit_now = true;
break; // doing any internal state management below
case eBroadcastInternalStateControlPause:
control_only = true;
break;
case eBroadcastInternalStateControlResume:
control_only = false;
break;
}
continue;
} else if (event_sp->GetType() == eBroadcastBitInterrupt) {
if (m_public_state.GetValue() == eStateAttaching) {
LLDB_LOGF(log,
"Process::%s (arg = %p, pid = %" PRIu64
") woke up with an interrupt while attaching - "
"forwarding interrupt.",
__FUNCTION__, static_cast<void *>(this), GetID());
// The server may be spinning waiting for a process to appear, in which
// case we should tell it to stop doing that. Normally, we don't NEED
// to do that because we will next close the communication to the stub
// and that will get it to shut down. But there are remote debugging
// cases where relying on that side-effect causes the shutdown to be
// flakey, so we should send a positive signal to interrupt the wait.
Status error = HaltPrivate();
BroadcastEvent(eBroadcastBitInterrupt, nullptr);
} else if (StateIsRunningState(m_last_broadcast_state)) {
LLDB_LOGF(log,
"Process::%s (arg = %p, pid = %" PRIu64
") woke up with an interrupt - Halting.",
__FUNCTION__, static_cast<void *>(this), GetID());
Status error = HaltPrivate();
if (error.Fail() && log)
LLDB_LOGF(log,
"Process::%s (arg = %p, pid = %" PRIu64
") failed to halt the process: %s",
__FUNCTION__, static_cast<void *>(this), GetID(),
error.AsCString());
// Halt should generate a stopped event. Make a note of the fact that
// we were doing the interrupt, so we can set the interrupted flag
// after we receive the event. We deliberately set this to true even if
// HaltPrivate failed, so that we can interrupt on the next natural
// stop.
interrupt_requested = true;
} else {
// This can happen when someone (e.g. Process::Halt) sees that we are
// running and sends an interrupt request, but the process actually
// stops before we receive it. In that case, we can just ignore the
// request. We use m_last_broadcast_state, because the Stopped event
// may not have been popped of the event queue yet, which is when the
// public state gets updated.
LLDB_LOGF(log,
"Process::%s ignoring interrupt as we have already stopped.",
__FUNCTION__);
}
continue;
}
const StateType internal_state =
Process::ProcessEventData::GetStateFromEvent(event_sp.get());
if (internal_state != eStateInvalid) {
if (m_clear_thread_plans_on_stop &&
StateIsStoppedState(internal_state, true)) {
m_clear_thread_plans_on_stop = false;
m_thread_list.DiscardThreadPlans();
}
if (interrupt_requested) {
if (StateIsStoppedState(internal_state, true)) {
// We requested the interrupt, so mark this as such in the stop event
// so clients can tell an interrupted process from a natural stop
ProcessEventData::SetInterruptedInEvent(event_sp.get(), true);
interrupt_requested = false;
} else if (log) {
LLDB_LOGF(log,
"Process::%s interrupt_requested, but a non-stopped "
"state '%s' received.",
__FUNCTION__, StateAsCString(internal_state));
}
}
HandlePrivateEvent(event_sp);
}
if (internal_state == eStateInvalid || internal_state == eStateExited ||
internal_state == eStateDetached) {
LLDB_LOGF(log,
"Process::%s (arg = %p, pid = %" PRIu64
") about to exit with internal state %s...",
__FUNCTION__, static_cast<void *>(this), GetID(),
StateAsCString(internal_state));
break;
}
}
// Verify log is still enabled before attempting to write to it...
LLDB_LOGF(log, "Process::%s (arg = %p, pid = %" PRIu64 ") thread exiting...",
__FUNCTION__, static_cast<void *>(this), GetID());
// If we are a secondary thread, then the primary thread we are working for
// will have already acquired the public_run_lock, and isn't done with what
// it was doing yet, so don't try to change it on the way out.
if (!is_secondary_thread)
m_public_run_lock.SetStopped();
return {};
}
// Process Event Data
Process::ProcessEventData::ProcessEventData() : EventData(), m_process_wp() {}
Process::ProcessEventData::ProcessEventData(const ProcessSP &process_sp,
StateType state)
: EventData(), m_process_wp(), m_state(state) {
if (process_sp)
m_process_wp = process_sp;
}
Process::ProcessEventData::~ProcessEventData() = default;
llvm::StringRef Process::ProcessEventData::GetFlavorString() {
return "Process::ProcessEventData";
}
llvm::StringRef Process::ProcessEventData::GetFlavor() const {
return ProcessEventData::GetFlavorString();
}
bool Process::ProcessEventData::ShouldStop(Event *event_ptr,
bool &found_valid_stopinfo) {
found_valid_stopinfo = false;
ProcessSP process_sp(m_process_wp.lock());
if (!process_sp)
return false;
ThreadList &curr_thread_list = process_sp->GetThreadList();
uint32_t num_threads = curr_thread_list.GetSize();
uint32_t idx;
// The actions might change one of the thread's stop_info's opinions about
// whether we should stop the process, so we need to query that as we go.
// One other complication here, is that we try to catch any case where the
// target has run (except for expressions) and immediately exit, but if we
// get that wrong (which is possible) then the thread list might have
// changed, and that would cause our iteration here to crash. We could
// make a copy of the thread list, but we'd really like to also know if it
// has changed at all, so we make up a vector of the thread ID's and check
// what we get back against this list & bag out if anything differs.
ThreadList not_suspended_thread_list(process_sp.get());
std::vector<uint32_t> thread_index_array(num_threads);
uint32_t not_suspended_idx = 0;
for (idx = 0; idx < num_threads; ++idx) {
lldb::ThreadSP thread_sp = curr_thread_list.GetThreadAtIndex(idx);
/*
Filter out all suspended threads, they could not be the reason
of stop and no need to perform any actions on them.
*/
if (thread_sp->GetResumeState() != eStateSuspended) {
not_suspended_thread_list.AddThread(thread_sp);
thread_index_array[not_suspended_idx] = thread_sp->GetIndexID();
not_suspended_idx++;
}
}
// Use this to track whether we should continue from here. We will only
// continue the target running if no thread says we should stop. Of course
// if some thread's PerformAction actually sets the target running, then it
// doesn't matter what the other threads say...
bool still_should_stop = false;
// Sometimes - for instance if we have a bug in the stub we are talking to,
// we stop but no thread has a valid stop reason. In that case we should
// just stop, because we have no way of telling what the right thing to do
// is, and it's better to let the user decide than continue behind their
// backs.
for (idx = 0; idx < not_suspended_thread_list.GetSize(); ++idx) {
curr_thread_list = process_sp->GetThreadList();
if (curr_thread_list.GetSize() != num_threads) {
Log *log(GetLog(LLDBLog::Step | LLDBLog::Process));
LLDB_LOGF(
log,
"Number of threads changed from %u to %u while processing event.",
num_threads, curr_thread_list.GetSize());
break;
}
lldb::ThreadSP thread_sp = not_suspended_thread_list.GetThreadAtIndex(idx);
if (thread_sp->GetIndexID() != thread_index_array[idx]) {
Log *log(GetLog(LLDBLog::Step | LLDBLog::Process));
LLDB_LOGF(log,
"The thread at position %u changed from %u to %u while "
"processing event.",
idx, thread_index_array[idx], thread_sp->GetIndexID());
break;
}
StopInfoSP stop_info_sp = thread_sp->GetStopInfo();
if (stop_info_sp && stop_info_sp->IsValid()) {
found_valid_stopinfo = true;
bool this_thread_wants_to_stop;
if (stop_info_sp->GetOverrideShouldStop()) {
this_thread_wants_to_stop =
stop_info_sp->GetOverriddenShouldStopValue();
} else {
stop_info_sp->PerformAction(event_ptr);
// The stop action might restart the target. If it does, then we
// want to mark that in the event so that whoever is receiving it
// will know to wait for the running event and reflect that state
// appropriately. We also need to stop processing actions, since they
// aren't expecting the target to be running.
// FIXME: we might have run.
if (stop_info_sp->HasTargetRunSinceMe()) {
SetRestarted(true);
break;
}
this_thread_wants_to_stop = stop_info_sp->ShouldStop(event_ptr);
}
if (!still_should_stop)
still_should_stop = this_thread_wants_to_stop;
}
}
return still_should_stop;
}
void Process::ProcessEventData::DoOnRemoval(Event *event_ptr) {
ProcessSP process_sp(m_process_wp.lock());
if (!process_sp)
return;
// This function gets called twice for each event, once when the event gets
// pulled off of the private process event queue, and then any number of
// times, first when it gets pulled off of the public event queue, then other
// times when we're pretending that this is where we stopped at the end of
// expression evaluation. m_update_state is used to distinguish these three
// cases; it is 0 when we're just pulling it off for private handling, and >
// 1 for expression evaluation, and we don't want to do the breakpoint
// command handling then.
if (m_update_state != 1)
return;
process_sp->SetPublicState(
m_state, Process::ProcessEventData::GetRestartedFromEvent(event_ptr));
if (m_state == eStateStopped && !m_restarted) {
// Let process subclasses know we are about to do a public stop and do
// anything they might need to in order to speed up register and memory
// accesses.
process_sp->WillPublicStop();
}
// If this is a halt event, even if the halt stopped with some reason other
// than a plain interrupt (e.g. we had already stopped for a breakpoint when
// the halt request came through) don't do the StopInfo actions, as they may
// end up restarting the process.
if (m_interrupted)
return;
// If we're not stopped or have restarted, then skip the StopInfo actions:
if (m_state != eStateStopped || m_restarted) {
return;
}
bool does_anybody_have_an_opinion = false;
bool still_should_stop = ShouldStop(event_ptr, does_anybody_have_an_opinion);
if (GetRestarted()) {
return;
}
if (!still_should_stop && does_anybody_have_an_opinion) {
// We've been asked to continue, so do that here.
SetRestarted(true);
// Use the private resume method here, since we aren't changing the run
// lock state.
process_sp->PrivateResume();
} else {
bool hijacked = process_sp->IsHijackedForEvent(eBroadcastBitStateChanged) &&
!process_sp->StateChangedIsHijackedForSynchronousResume();
if (!hijacked) {
// If we didn't restart, run the Stop Hooks here.
// Don't do that if state changed events aren't hooked up to the
// public (or SyncResume) broadcasters. StopHooks are just for
// real public stops. They might also restart the target,
// so watch for that.
if (process_sp->GetTarget().RunStopHooks())
SetRestarted(true);
}
}
}
void Process::ProcessEventData::Dump(Stream *s) const {
ProcessSP process_sp(m_process_wp.lock());
if (process_sp)
s->Printf(" process = %p (pid = %" PRIu64 "), ",
static_cast<void *>(process_sp.get()), process_sp->GetID());
else
s->PutCString(" process = NULL, ");
s->Printf("state = %s", StateAsCString(GetState()));
}
const Process::ProcessEventData *
Process::ProcessEventData::GetEventDataFromEvent(const Event *event_ptr) {
if (event_ptr) {
const EventData *event_data = event_ptr->GetData();
if (event_data &&
event_data->GetFlavor() == ProcessEventData::GetFlavorString())
return static_cast<const ProcessEventData *>(event_ptr->GetData());
}
return nullptr;
}
ProcessSP
Process::ProcessEventData::GetProcessFromEvent(const Event *event_ptr) {
ProcessSP process_sp;
const ProcessEventData *data = GetEventDataFromEvent(event_ptr);
if (data)
process_sp = data->GetProcessSP();
return process_sp;
}
StateType Process::ProcessEventData::GetStateFromEvent(const Event *event_ptr) {
const ProcessEventData *data = GetEventDataFromEvent(event_ptr);
if (data == nullptr)
return eStateInvalid;
else
return data->GetState();
}
bool Process::ProcessEventData::GetRestartedFromEvent(const Event *event_ptr) {
const ProcessEventData *data = GetEventDataFromEvent(event_ptr);
if (data == nullptr)
return false;
else
return data->GetRestarted();
}
void Process::ProcessEventData::SetRestartedInEvent(Event *event_ptr,
bool new_value) {
ProcessEventData *data =
const_cast<ProcessEventData *>(GetEventDataFromEvent(event_ptr));
if (data != nullptr)
data->SetRestarted(new_value);
}
size_t
Process::ProcessEventData::GetNumRestartedReasons(const Event *event_ptr) {
ProcessEventData *data =
const_cast<ProcessEventData *>(GetEventDataFromEvent(event_ptr));
if (data != nullptr)
return data->GetNumRestartedReasons();
else
return 0;
}
const char *
Process::ProcessEventData::GetRestartedReasonAtIndex(const Event *event_ptr,
size_t idx) {
ProcessEventData *data =
const_cast<ProcessEventData *>(GetEventDataFromEvent(event_ptr));
if (data != nullptr)
return data->GetRestartedReasonAtIndex(idx);
else
return nullptr;
}
void Process::ProcessEventData::AddRestartedReason(Event *event_ptr,
const char *reason) {
ProcessEventData *data =
const_cast<ProcessEventData *>(GetEventDataFromEvent(event_ptr));
if (data != nullptr)
data->AddRestartedReason(reason);
}
bool Process::ProcessEventData::GetInterruptedFromEvent(
const Event *event_ptr) {
const ProcessEventData *data = GetEventDataFromEvent(event_ptr);
if (data == nullptr)
return false;
else
return data->GetInterrupted();
}
void Process::ProcessEventData::SetInterruptedInEvent(Event *event_ptr,
bool new_value) {
ProcessEventData *data =
const_cast<ProcessEventData *>(GetEventDataFromEvent(event_ptr));
if (data != nullptr)
data->SetInterrupted(new_value);
}
bool Process::ProcessEventData::SetUpdateStateOnRemoval(Event *event_ptr) {
ProcessEventData *data =
const_cast<ProcessEventData *>(GetEventDataFromEvent(event_ptr));
if (data) {
data->SetUpdateStateOnRemoval();
return true;
}
return false;
}
lldb::TargetSP Process::CalculateTarget() { return m_target_wp.lock(); }
void Process::CalculateExecutionContext(ExecutionContext &exe_ctx) {
exe_ctx.SetTargetPtr(&GetTarget());
exe_ctx.SetProcessPtr(this);
exe_ctx.SetThreadPtr(nullptr);
exe_ctx.SetFramePtr(nullptr);
}
// uint32_t
// Process::ListProcessesMatchingName (const char *name, StringList &matches,
// std::vector<lldb::pid_t> &pids)
//{
// return 0;
//}
//
// ArchSpec
// Process::GetArchSpecForExistingProcess (lldb::pid_t pid)
//{
// return Host::GetArchSpecForExistingProcess (pid);
//}
//
// ArchSpec
// Process::GetArchSpecForExistingProcess (const char *process_name)
//{
// return Host::GetArchSpecForExistingProcess (process_name);
//}
EventSP Process::CreateEventFromProcessState(uint32_t event_type) {
auto event_data_sp =
std::make_shared<ProcessEventData>(shared_from_this(), GetState());
return std::make_shared<Event>(event_type, event_data_sp);
}
void Process::AppendSTDOUT(const char *s, size_t len) {
std::lock_guard<std::recursive_mutex> guard(m_stdio_communication_mutex);
m_stdout_data.append(s, len);
auto event_sp = CreateEventFromProcessState(eBroadcastBitSTDOUT);
BroadcastEventIfUnique(event_sp);
}
void Process::AppendSTDERR(const char *s, size_t len) {
std::lock_guard<std::recursive_mutex> guard(m_stdio_communication_mutex);
m_stderr_data.append(s, len);
auto event_sp = CreateEventFromProcessState(eBroadcastBitSTDERR);
BroadcastEventIfUnique(event_sp);
}
void Process::BroadcastAsyncProfileData(const std::string &one_profile_data) {
std::lock_guard<std::recursive_mutex> guard(m_profile_data_comm_mutex);
m_profile_data.push_back(one_profile_data);
auto event_sp = CreateEventFromProcessState(eBroadcastBitProfileData);
BroadcastEventIfUnique(event_sp);
}
void Process::BroadcastStructuredData(const StructuredData::ObjectSP &object_sp,
const StructuredDataPluginSP &plugin_sp) {
auto data_sp = std::make_shared<EventDataStructuredData>(
shared_from_this(), object_sp, plugin_sp);
BroadcastEvent(eBroadcastBitStructuredData, data_sp);
}
StructuredDataPluginSP
Process::GetStructuredDataPlugin(llvm::StringRef type_name) const {
auto find_it = m_structured_data_plugin_map.find(type_name);
if (find_it != m_structured_data_plugin_map.end())
return find_it->second;
else
return StructuredDataPluginSP();
}
size_t Process::GetAsyncProfileData(char *buf, size_t buf_size, Status &error) {
std::lock_guard<std::recursive_mutex> guard(m_profile_data_comm_mutex);
if (m_profile_data.empty())
return 0;
std::string &one_profile_data = m_profile_data.front();
size_t bytes_available = one_profile_data.size();
if (bytes_available > 0) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log, "Process::GetProfileData (buf = %p, size = %" PRIu64 ")",
static_cast<void *>(buf), static_cast<uint64_t>(buf_size));
if (bytes_available > buf_size) {
memcpy(buf, one_profile_data.c_str(), buf_size);
one_profile_data.erase(0, buf_size);
bytes_available = buf_size;
} else {
memcpy(buf, one_profile_data.c_str(), bytes_available);
m_profile_data.erase(m_profile_data.begin());
}
}
return bytes_available;
}
// Process STDIO
size_t Process::GetSTDOUT(char *buf, size_t buf_size, Status &error) {
std::lock_guard<std::recursive_mutex> guard(m_stdio_communication_mutex);
size_t bytes_available = m_stdout_data.size();
if (bytes_available > 0) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log, "Process::GetSTDOUT (buf = %p, size = %" PRIu64 ")",
static_cast<void *>(buf), static_cast<uint64_t>(buf_size));
if (bytes_available > buf_size) {
memcpy(buf, m_stdout_data.c_str(), buf_size);
m_stdout_data.erase(0, buf_size);
bytes_available = buf_size;
} else {
memcpy(buf, m_stdout_data.c_str(), bytes_available);
m_stdout_data.clear();
}
}
return bytes_available;
}
size_t Process::GetSTDERR(char *buf, size_t buf_size, Status &error) {
std::lock_guard<std::recursive_mutex> gaurd(m_stdio_communication_mutex);
size_t bytes_available = m_stderr_data.size();
if (bytes_available > 0) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log, "Process::GetSTDERR (buf = %p, size = %" PRIu64 ")",
static_cast<void *>(buf), static_cast<uint64_t>(buf_size));
if (bytes_available > buf_size) {
memcpy(buf, m_stderr_data.c_str(), buf_size);
m_stderr_data.erase(0, buf_size);
bytes_available = buf_size;
} else {
memcpy(buf, m_stderr_data.c_str(), bytes_available);
m_stderr_data.clear();
}
}
return bytes_available;
}
void Process::STDIOReadThreadBytesReceived(void *baton, const void *src,
size_t src_len) {
Process *process = (Process *)baton;
process->AppendSTDOUT(static_cast<const char *>(src), src_len);
}
class IOHandlerProcessSTDIO : public IOHandler {
public:
IOHandlerProcessSTDIO(Process *process, int write_fd)
: IOHandler(process->GetTarget().GetDebugger(),
IOHandler::Type::ProcessIO),
m_process(process),
m_read_file(GetInputFD(), File::eOpenOptionReadOnly, false),
m_write_file(write_fd, File::eOpenOptionWriteOnly, false) {
m_pipe.CreateNew(false);
}
~IOHandlerProcessSTDIO() override = default;
void SetIsRunning(bool running) {
std::lock_guard<std::mutex> guard(m_mutex);
SetIsDone(!running);
m_is_running = running;
}
// Each IOHandler gets to run until it is done. It should read data from the
// "in" and place output into "out" and "err and return when done.
void Run() override {
if (!m_read_file.IsValid() || !m_write_file.IsValid() ||
!m_pipe.CanRead() || !m_pipe.CanWrite()) {
SetIsDone(true);
return;
}
SetIsDone(false);
const int read_fd = m_read_file.GetDescriptor();
Terminal terminal(read_fd);
TerminalState terminal_state(terminal, false);
// FIXME: error handling?
llvm::consumeError(terminal.SetCanonical(false));
llvm::consumeError(terminal.SetEcho(false));
// FD_ZERO, FD_SET are not supported on windows
#ifndef _WIN32
const int pipe_read_fd = m_pipe.GetReadFileDescriptor();
SetIsRunning(true);
while (true) {
{
std::lock_guard<std::mutex> guard(m_mutex);
if (GetIsDone())
break;
}
SelectHelper select_helper;
select_helper.FDSetRead(read_fd);
select_helper.FDSetRead(pipe_read_fd);
Status error = select_helper.Select();
if (error.Fail())
break;
char ch = 0;
size_t n;
if (select_helper.FDIsSetRead(read_fd)) {
n = 1;
if (m_read_file.Read(&ch, n).Success() && n == 1) {
if (m_write_file.Write(&ch, n).Fail() || n != 1)
break;
} else
break;
}
if (select_helper.FDIsSetRead(pipe_read_fd)) {
size_t bytes_read;
// Consume the interrupt byte
Status error = m_pipe.Read(&ch, 1, bytes_read);
if (error.Success()) {
if (ch == 'q')
break;
if (ch == 'i')
if (StateIsRunningState(m_process->GetState()))
m_process->SendAsyncInterrupt();
}
}
}
SetIsRunning(false);
#endif
}
void Cancel() override {
std::lock_guard<std::mutex> guard(m_mutex);
SetIsDone(true);
// Only write to our pipe to cancel if we are in
// IOHandlerProcessSTDIO::Run(). We can end up with a python command that
// is being run from the command interpreter:
//
// (lldb) step_process_thousands_of_times
//
// In this case the command interpreter will be in the middle of handling
// the command and if the process pushes and pops the IOHandler thousands
// of times, we can end up writing to m_pipe without ever consuming the
// bytes from the pipe in IOHandlerProcessSTDIO::Run() and end up
// deadlocking when the pipe gets fed up and blocks until data is consumed.
if (m_is_running) {
char ch = 'q'; // Send 'q' for quit
size_t bytes_written = 0;
m_pipe.Write(&ch, 1, bytes_written);
}
}
bool Interrupt() override {
// Do only things that are safe to do in an interrupt context (like in a
// SIGINT handler), like write 1 byte to a file descriptor. This will
// interrupt the IOHandlerProcessSTDIO::Run() and we can look at the byte
// that was written to the pipe and then call
// m_process->SendAsyncInterrupt() from a much safer location in code.
if (m_active) {
char ch = 'i'; // Send 'i' for interrupt
size_t bytes_written = 0;
Status result = m_pipe.Write(&ch, 1, bytes_written);
return result.Success();
} else {
// This IOHandler might be pushed on the stack, but not being run
// currently so do the right thing if we aren't actively watching for
// STDIN by sending the interrupt to the process. Otherwise the write to
// the pipe above would do nothing. This can happen when the command
// interpreter is running and gets a "expression ...". It will be on the
// IOHandler thread and sending the input is complete to the delegate
// which will cause the expression to run, which will push the process IO
// handler, but not run it.
if (StateIsRunningState(m_process->GetState())) {
m_process->SendAsyncInterrupt();
return true;
}
}
return false;
}
void GotEOF() override {}
protected:
Process *m_process;
NativeFile m_read_file; // Read from this file (usually actual STDIN for LLDB
NativeFile m_write_file; // Write to this file (usually the primary pty for
// getting io to debuggee)
Pipe m_pipe;
std::mutex m_mutex;
bool m_is_running = false;
};
void Process::SetSTDIOFileDescriptor(int fd) {
// First set up the Read Thread for reading/handling process I/O
m_stdio_communication.SetConnection(
std::make_unique<ConnectionFileDescriptor>(fd, true));
if (m_stdio_communication.IsConnected()) {
m_stdio_communication.SetReadThreadBytesReceivedCallback(
STDIOReadThreadBytesReceived, this);
m_stdio_communication.StartReadThread();
// Now read thread is set up, set up input reader.
{
std::lock_guard<std::mutex> guard(m_process_input_reader_mutex);
if (!m_process_input_reader)
m_process_input_reader =
std::make_shared<IOHandlerProcessSTDIO>(this, fd);
}
}
}
bool Process::ProcessIOHandlerIsActive() {
std::lock_guard<std::mutex> guard(m_process_input_reader_mutex);
IOHandlerSP io_handler_sp(m_process_input_reader);
if (io_handler_sp)
return GetTarget().GetDebugger().IsTopIOHandler(io_handler_sp);
return false;
}
bool Process::PushProcessIOHandler() {
std::lock_guard<std::mutex> guard(m_process_input_reader_mutex);
IOHandlerSP io_handler_sp(m_process_input_reader);
if (io_handler_sp) {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log, "Process::%s pushing IO handler", __FUNCTION__);
io_handler_sp->SetIsDone(false);
// If we evaluate an utility function, then we don't cancel the current
// IOHandler. Our IOHandler is non-interactive and shouldn't disturb the
// existing IOHandler that potentially provides the user interface (e.g.
// the IOHandler for Editline).
bool cancel_top_handler = !m_mod_id.IsRunningUtilityFunction();
GetTarget().GetDebugger().RunIOHandlerAsync(io_handler_sp,
cancel_top_handler);
return true;
}
return false;
}
bool Process::PopProcessIOHandler() {
std::lock_guard<std::mutex> guard(m_process_input_reader_mutex);
IOHandlerSP io_handler_sp(m_process_input_reader);
if (io_handler_sp)
return GetTarget().GetDebugger().RemoveIOHandler(io_handler_sp);
return false;
}
// The process needs to know about installed plug-ins
void Process::SettingsInitialize() { Thread::SettingsInitialize(); }
void Process::SettingsTerminate() { Thread::SettingsTerminate(); }
namespace {
// RestorePlanState is used to record the "is private", "is controlling" and
// "okay
// to discard" fields of the plan we are running, and reset it on Clean or on
// destruction. It will only reset the state once, so you can call Clean and
// then monkey with the state and it won't get reset on you again.
class RestorePlanState {
public:
RestorePlanState(lldb::ThreadPlanSP thread_plan_sp)
: m_thread_plan_sp(thread_plan_sp) {
if (m_thread_plan_sp) {
m_private = m_thread_plan_sp->GetPrivate();
m_is_controlling = m_thread_plan_sp->IsControllingPlan();
m_okay_to_discard = m_thread_plan_sp->OkayToDiscard();
}
}
~RestorePlanState() { Clean(); }
void Clean() {
if (!m_already_reset && m_thread_plan_sp) {
m_already_reset = true;
m_thread_plan_sp->SetPrivate(m_private);
m_thread_plan_sp->SetIsControllingPlan(m_is_controlling);
m_thread_plan_sp->SetOkayToDiscard(m_okay_to_discard);
}
}
private:
lldb::ThreadPlanSP m_thread_plan_sp;
bool m_already_reset = false;
bool m_private = false;
bool m_is_controlling = false;
bool m_okay_to_discard = false;
};
} // anonymous namespace
static microseconds
GetOneThreadExpressionTimeout(const EvaluateExpressionOptions &options) {
const milliseconds default_one_thread_timeout(250);
// If the overall wait is forever, then we don't need to worry about it.
if (!options.GetTimeout()) {
return options.GetOneThreadTimeout() ? *options.GetOneThreadTimeout()
: default_one_thread_timeout;
}
// If the one thread timeout is set, use it.
if (options.GetOneThreadTimeout())
return *options.GetOneThreadTimeout();
// Otherwise use half the total timeout, bounded by the
// default_one_thread_timeout.
return std::min<microseconds>(default_one_thread_timeout,
*options.GetTimeout() / 2);
}
static Timeout<std::micro>
GetExpressionTimeout(const EvaluateExpressionOptions &options,
bool before_first_timeout) {
// If we are going to run all threads the whole time, or if we are only going
// to run one thread, we can just return the overall timeout.
if (!options.GetStopOthers() || !options.GetTryAllThreads())
return options.GetTimeout();
if (before_first_timeout)
return GetOneThreadExpressionTimeout(options);
if (!options.GetTimeout())
return std::nullopt;
else
return *options.GetTimeout() - GetOneThreadExpressionTimeout(options);
}
static std::optional<ExpressionResults>
HandleStoppedEvent(lldb::tid_t thread_id, const ThreadPlanSP &thread_plan_sp,
RestorePlanState &restorer, const EventSP &event_sp,
EventSP &event_to_broadcast_sp,
const EvaluateExpressionOptions &options,
bool handle_interrupts) {
Log *log = GetLog(LLDBLog::Step | LLDBLog::Process);
ThreadSP thread_sp = thread_plan_sp->GetTarget()
.GetProcessSP()
->GetThreadList()
.FindThreadByID(thread_id);
if (!thread_sp) {
LLDB_LOG(log,
"The thread on which we were running the "
"expression: tid = {0}, exited while "
"the expression was running.",
thread_id);
return eExpressionThreadVanished;
}
ThreadPlanSP plan = thread_sp->GetCompletedPlan();
if (plan == thread_plan_sp && plan->PlanSucceeded()) {
LLDB_LOG(log, "execution completed successfully");
// Restore the plan state so it will get reported as intended when we are
// done.
restorer.Clean();
return eExpressionCompleted;
}
StopInfoSP stop_info_sp = thread_sp->GetStopInfo();
if (stop_info_sp && stop_info_sp->GetStopReason() == eStopReasonBreakpoint &&
stop_info_sp->ShouldNotify(event_sp.get())) {
LLDB_LOG(log, "stopped for breakpoint: {0}.", stop_info_sp->GetDescription());
if (!options.DoesIgnoreBreakpoints()) {
// Restore the plan state and then force Private to false. We are going
// to stop because of this plan so we need it to become a public plan or
// it won't report correctly when we continue to its termination later
// on.
restorer.Clean();
thread_plan_sp->SetPrivate(false);
event_to_broadcast_sp = event_sp;
}
return eExpressionHitBreakpoint;
}
if (!handle_interrupts &&
Process::ProcessEventData::GetInterruptedFromEvent(event_sp.get()))
return std::nullopt;
LLDB_LOG(log, "thread plan did not successfully complete");
if (!options.DoesUnwindOnError())
event_to_broadcast_sp = event_sp;
return eExpressionInterrupted;
}
ExpressionResults
Process::RunThreadPlan(ExecutionContext &exe_ctx,
lldb::ThreadPlanSP &thread_plan_sp,
const EvaluateExpressionOptions &options,
DiagnosticManager &diagnostic_manager) {
ExpressionResults return_value = eExpressionSetupError;
std::lock_guard<std::mutex> run_thread_plan_locker(m_run_thread_plan_lock);
if (!thread_plan_sp) {
diagnostic_manager.PutString(
eDiagnosticSeverityError,
"RunThreadPlan called with empty thread plan.");
return eExpressionSetupError;
}
if (!thread_plan_sp->ValidatePlan(nullptr)) {
diagnostic_manager.PutString(
eDiagnosticSeverityError,
"RunThreadPlan called with an invalid thread plan.");
return eExpressionSetupError;
}
if (exe_ctx.GetProcessPtr() != this) {
diagnostic_manager.PutString(eDiagnosticSeverityError,
"RunThreadPlan called on wrong process.");
return eExpressionSetupError;
}
Thread *thread = exe_ctx.GetThreadPtr();
if (thread == nullptr) {
diagnostic_manager.PutString(eDiagnosticSeverityError,
"RunThreadPlan called with invalid thread.");
return eExpressionSetupError;
}
// Record the thread's id so we can tell when a thread we were using
// to run the expression exits during the expression evaluation.
lldb::tid_t expr_thread_id = thread->GetID();
// We need to change some of the thread plan attributes for the thread plan
// runner. This will restore them when we are done:
RestorePlanState thread_plan_restorer(thread_plan_sp);
// We rely on the thread plan we are running returning "PlanCompleted" if
// when it successfully completes. For that to be true the plan can't be
// private - since private plans suppress themselves in the GetCompletedPlan
// call.
thread_plan_sp->SetPrivate(false);
// The plans run with RunThreadPlan also need to be terminal controlling plans
// or when they are done we will end up asking the plan above us whether we
// should stop, which may give the wrong answer.
thread_plan_sp->SetIsControllingPlan(true);
thread_plan_sp->SetOkayToDiscard(false);
// If we are running some utility expression for LLDB, we now have to mark
// this in the ProcesModID of this process. This RAII takes care of marking
// and reverting the mark it once we are done running the expression.
UtilityFunctionScope util_scope(options.IsForUtilityExpr() ? this : nullptr);
if (m_private_state.GetValue() != eStateStopped) {
diagnostic_manager.PutString(
eDiagnosticSeverityError,
"RunThreadPlan called while the private state was not stopped.");
return eExpressionSetupError;
}
// Save the thread & frame from the exe_ctx for restoration after we run
const uint32_t thread_idx_id = thread->GetIndexID();
StackFrameSP selected_frame_sp =
thread->GetSelectedFrame(DoNoSelectMostRelevantFrame);
if (!selected_frame_sp) {
thread->SetSelectedFrame(nullptr);
selected_frame_sp = thread->GetSelectedFrame(DoNoSelectMostRelevantFrame);
if (!selected_frame_sp) {
diagnostic_manager.Printf(
eDiagnosticSeverityError,
"RunThreadPlan called without a selected frame on thread %d",
thread_idx_id);
return eExpressionSetupError;
}
}
// Make sure the timeout values make sense. The one thread timeout needs to
// be smaller than the overall timeout.
if (options.GetOneThreadTimeout() && options.GetTimeout() &&
*options.GetTimeout() < *options.GetOneThreadTimeout()) {
diagnostic_manager.PutString(eDiagnosticSeverityError,
"RunThreadPlan called with one thread "
"timeout greater than total timeout");
return eExpressionSetupError;
}
StackID ctx_frame_id = selected_frame_sp->GetStackID();
// N.B. Running the target may unset the currently selected thread and frame.
// We don't want to do that either, so we should arrange to reset them as
// well.
lldb::ThreadSP selected_thread_sp = GetThreadList().GetSelectedThread();
uint32_t selected_tid;
StackID selected_stack_id;
if (selected_thread_sp) {
selected_tid = selected_thread_sp->GetIndexID();
selected_stack_id =
selected_thread_sp->GetSelectedFrame(DoNoSelectMostRelevantFrame)
->GetStackID();
} else {
selected_tid = LLDB_INVALID_THREAD_ID;
}
HostThread backup_private_state_thread;
lldb::StateType old_state = eStateInvalid;
lldb::ThreadPlanSP stopper_base_plan_sp;
Log *log(GetLog(LLDBLog::Step | LLDBLog::Process));
if (m_private_state_thread.EqualsThread(Host::GetCurrentThread())) {
// Yikes, we are running on the private state thread! So we can't wait for
// public events on this thread, since we are the thread that is generating
// public events. The simplest thing to do is to spin up a temporary thread
// to handle private state thread events while we are fielding public
// events here.
LLDB_LOGF(log, "Running thread plan on private state thread, spinning up "
"another state thread to handle the events.");
backup_private_state_thread = m_private_state_thread;
// One other bit of business: we want to run just this thread plan and
// anything it pushes, and then stop, returning control here. But in the
// normal course of things, the plan above us on the stack would be given a
// shot at the stop event before deciding to stop, and we don't want that.
// So we insert a "stopper" base plan on the stack before the plan we want
// to run. Since base plans always stop and return control to the user,
// that will do just what we want.
stopper_base_plan_sp.reset(new ThreadPlanBase(*thread));
thread->QueueThreadPlan(stopper_base_plan_sp, false);
// Have to make sure our public state is stopped, since otherwise the
// reporting logic below doesn't work correctly.
old_state = m_public_state.GetValue();
m_public_state.SetValueNoLock(eStateStopped);
// Now spin up the private state thread:
StartPrivateStateThread(true);
}
thread->QueueThreadPlan(
thread_plan_sp, false); // This used to pass "true" does that make sense?
if (options.GetDebug()) {
// In this case, we aren't actually going to run, we just want to stop
// right away. Flush this thread so we will refetch the stacks and show the
// correct backtrace.
// FIXME: To make this prettier we should invent some stop reason for this,
// but that
// is only cosmetic, and this functionality is only of use to lldb
// developers who can live with not pretty...
thread->Flush();
return eExpressionStoppedForDebug;
}
ListenerSP listener_sp(
Listener::MakeListener("lldb.process.listener.run-thread-plan"));
lldb::EventSP event_to_broadcast_sp;
{
// This process event hijacker Hijacks the Public events and its destructor
// makes sure that the process events get restored on exit to the function.
//
// If the event needs to propagate beyond the hijacker (e.g., the process
// exits during execution), then the event is put into
// event_to_broadcast_sp for rebroadcasting.
ProcessEventHijacker run_thread_plan_hijacker(*this, listener_sp);
if (log) {
StreamString s;
thread_plan_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose);
LLDB_LOGF(log,
"Process::RunThreadPlan(): Resuming thread %u - 0x%4.4" PRIx64
" to run thread plan \"%s\".",
thread_idx_id, expr_thread_id, s.GetData());
}
bool got_event;
lldb::EventSP event_sp;
lldb::StateType stop_state = lldb::eStateInvalid;
bool before_first_timeout = true; // This is set to false the first time
// that we have to halt the target.
bool do_resume = true;
bool handle_running_event = true;
// This is just for accounting:
uint32_t num_resumes = 0;
// If we are going to run all threads the whole time, or if we are only
// going to run one thread, then we don't need the first timeout. So we
// pretend we are after the first timeout already.
if (!options.GetStopOthers() || !options.GetTryAllThreads())
before_first_timeout = false;
LLDB_LOGF(log, "Stop others: %u, try all: %u, before_first: %u.\n",
options.GetStopOthers(), options.GetTryAllThreads(),
before_first_timeout);
// This isn't going to work if there are unfetched events on the queue. Are
// there cases where we might want to run the remaining events here, and
// then try to call the function? That's probably being too tricky for our
// own good.
Event *other_events = listener_sp->PeekAtNextEvent();
if (other_events != nullptr) {
diagnostic_manager.PutString(
eDiagnosticSeverityError,
"RunThreadPlan called with pending events on the queue.");
return eExpressionSetupError;
}
// We also need to make sure that the next event is delivered. We might be
// calling a function as part of a thread plan, in which case the last
// delivered event could be the running event, and we don't want event
// coalescing to cause us to lose OUR running event...
ForceNextEventDelivery();
// This while loop must exit out the bottom, there's cleanup that we need to do
// when we are done. So don't call return anywhere within it.
#ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT
// It's pretty much impossible to write test cases for things like: One
// thread timeout expires, I go to halt, but the process already stopped on
// the function call stop breakpoint. Turning on this define will make us
// not fetch the first event till after the halt. So if you run a quick
// function, it will have completed, and the completion event will be
// waiting, when you interrupt for halt. The expression evaluation should
// still succeed.
bool miss_first_event = true;
#endif
while (true) {
// We usually want to resume the process if we get to the top of the
// loop. The only exception is if we get two running events with no
// intervening stop, which can happen, we will just wait for then next
// stop event.
LLDB_LOGF(log,
"Top of while loop: do_resume: %i handle_running_event: %i "
"before_first_timeout: %i.",
do_resume, handle_running_event, before_first_timeout);
if (do_resume || handle_running_event) {
// Do the initial resume and wait for the running event before going
// further.
if (do_resume) {
num_resumes++;
Status resume_error = PrivateResume();
if (!resume_error.Success()) {
diagnostic_manager.Printf(
eDiagnosticSeverityError,
"couldn't resume inferior the %d time: \"%s\".", num_resumes,
resume_error.AsCString());
return_value = eExpressionSetupError;
break;
}
}
got_event =
listener_sp->GetEvent(event_sp, GetUtilityExpressionTimeout());
if (!got_event) {
LLDB_LOGF(log,
"Process::RunThreadPlan(): didn't get any event after "
"resume %" PRIu32 ", exiting.",
num_resumes);
diagnostic_manager.Printf(eDiagnosticSeverityError,
"didn't get any event after resume %" PRIu32
", exiting.",
num_resumes);
return_value = eExpressionSetupError;
break;
}
stop_state =
Process::ProcessEventData::GetStateFromEvent(event_sp.get());
if (stop_state != eStateRunning) {
bool restarted = false;
if (stop_state == eStateStopped) {
restarted = Process::ProcessEventData::GetRestartedFromEvent(
event_sp.get());
LLDB_LOGF(
log,
"Process::RunThreadPlan(): didn't get running event after "
"resume %d, got %s instead (restarted: %i, do_resume: %i, "
"handle_running_event: %i).",
num_resumes, StateAsCString(stop_state), restarted, do_resume,
handle_running_event);
}
if (restarted) {
// This is probably an overabundance of caution, I don't think I
// should ever get a stopped & restarted event here. But if I do,
// the best thing is to Halt and then get out of here.
const bool clear_thread_plans = false;
const bool use_run_lock = false;
Halt(clear_thread_plans, use_run_lock);
}
diagnostic_manager.Printf(
eDiagnosticSeverityError,
"didn't get running event after initial resume, got %s instead.",
StateAsCString(stop_state));
return_value = eExpressionSetupError;
break;
}
if (log)
log->PutCString("Process::RunThreadPlan(): resuming succeeded.");
// We need to call the function synchronously, so spin waiting for it
// to return. If we get interrupted while executing, we're going to
// lose our context, and won't be able to gather the result at this
// point. We set the timeout AFTER the resume, since the resume takes
// some time and we don't want to charge that to the timeout.
} else {
if (log)
log->PutCString("Process::RunThreadPlan(): waiting for next event.");
}
do_resume = true;
handle_running_event = true;
// Now wait for the process to stop again:
event_sp.reset();
Timeout<std::micro> timeout =
GetExpressionTimeout(options, before_first_timeout);
if (log) {
if (timeout) {
auto now = system_clock::now();
LLDB_LOGF(log,
"Process::RunThreadPlan(): about to wait - now is %s - "
"endpoint is %s",
llvm::to_string(now).c_str(),
llvm::to_string(now + *timeout).c_str());
} else {
LLDB_LOGF(log, "Process::RunThreadPlan(): about to wait forever.");
}
}
#ifdef LLDB_RUN_THREAD_HALT_WITH_EVENT
// See comment above...
if (miss_first_event) {
std::this_thread::sleep_for(std::chrono::milliseconds(1));
miss_first_event = false;
got_event = false;
} else
#endif
got_event = listener_sp->GetEvent(event_sp, timeout);
if (got_event) {
if (event_sp) {
bool keep_going = false;
if (event_sp->GetType() == eBroadcastBitInterrupt) {
const bool clear_thread_plans = false;
const bool use_run_lock = false;
Halt(clear_thread_plans, use_run_lock);
return_value = eExpressionInterrupted;
diagnostic_manager.PutString(eDiagnosticSeverityRemark,
"execution halted by user interrupt.");
LLDB_LOGF(log, "Process::RunThreadPlan(): Got interrupted by "
"eBroadcastBitInterrupted, exiting.");
break;
} else {
stop_state =
Process::ProcessEventData::GetStateFromEvent(event_sp.get());
LLDB_LOGF(log,
"Process::RunThreadPlan(): in while loop, got event: %s.",
StateAsCString(stop_state));
switch (stop_state) {
case lldb::eStateStopped: {
if (Process::ProcessEventData::GetRestartedFromEvent(
event_sp.get())) {
// If we were restarted, we just need to go back up to fetch
// another event.
LLDB_LOGF(log, "Process::RunThreadPlan(): Got a stop and "
"restart, so we'll continue waiting.");
keep_going = true;
do_resume = false;
handle_running_event = true;
} else {
const bool handle_interrupts = true;
return_value = *HandleStoppedEvent(
expr_thread_id, thread_plan_sp, thread_plan_restorer,
event_sp, event_to_broadcast_sp, options,
handle_interrupts);
if (return_value == eExpressionThreadVanished)
keep_going = false;
}
} break;
case lldb::eStateRunning:
// This shouldn't really happen, but sometimes we do get two
// running events without an intervening stop, and in that case
// we should just go back to waiting for the stop.
do_resume = false;
keep_going = true;
handle_running_event = false;
break;
default:
LLDB_LOGF(log,
"Process::RunThreadPlan(): execution stopped with "
"unexpected state: %s.",
StateAsCString(stop_state));
if (stop_state == eStateExited)
event_to_broadcast_sp = event_sp;
diagnostic_manager.PutString(
eDiagnosticSeverityError,
"execution stopped with unexpected state.");
return_value = eExpressionInterrupted;
break;
}
}
if (keep_going)
continue;
else
break;
} else {
if (log)
log->PutCString("Process::RunThreadPlan(): got_event was true, but "
"the event pointer was null. How odd...");
return_value = eExpressionInterrupted;
break;
}
} else {
// If we didn't get an event that means we've timed out... We will
// interrupt the process here. Depending on what we were asked to do
// we will either exit, or try with all threads running for the same
// timeout.
if (log) {
if (options.GetTryAllThreads()) {
if (before_first_timeout) {
LLDB_LOG(log,
"Running function with one thread timeout timed out.");
} else
LLDB_LOG(log, "Restarting function with all threads enabled and "
"timeout: {0} timed out, abandoning execution.",
timeout);
} else
LLDB_LOG(log, "Running function with timeout: {0} timed out, "
"abandoning execution.",
timeout);
}
// It is possible that between the time we issued the Halt, and we get
// around to calling Halt the target could have stopped. That's fine,
// Halt will figure that out and send the appropriate Stopped event.
// BUT it is also possible that we stopped & restarted (e.g. hit a
// signal with "stop" set to false.) In
// that case, we'll get the stopped & restarted event, and we should go
// back to waiting for the Halt's stopped event. That's what this
// while loop does.
bool back_to_top = true;
uint32_t try_halt_again = 0;
bool do_halt = true;
const uint32_t num_retries = 5;
while (try_halt_again < num_retries) {
Status halt_error;
if (do_halt) {
LLDB_LOGF(log, "Process::RunThreadPlan(): Running Halt.");
const bool clear_thread_plans = false;
const bool use_run_lock = false;
Halt(clear_thread_plans, use_run_lock);
}
if (halt_error.Success()) {
if (log)
log->PutCString("Process::RunThreadPlan(): Halt succeeded.");
got_event =
listener_sp->GetEvent(event_sp, GetUtilityExpressionTimeout());
if (got_event) {
stop_state =
Process::ProcessEventData::GetStateFromEvent(event_sp.get());
if (log) {
LLDB_LOGF(log,
"Process::RunThreadPlan(): Stopped with event: %s",
StateAsCString(stop_state));
if (stop_state == lldb::eStateStopped &&
Process::ProcessEventData::GetInterruptedFromEvent(
event_sp.get()))
log->PutCString(" Event was the Halt interruption event.");
}
if (stop_state == lldb::eStateStopped) {
if (Process::ProcessEventData::GetRestartedFromEvent(
event_sp.get())) {
if (log)
log->PutCString("Process::RunThreadPlan(): Went to halt "
"but got a restarted event, there must be "
"an un-restarted stopped event so try "
"again... "
"Exiting wait loop.");
try_halt_again++;
do_halt = false;
continue;
}
// Between the time we initiated the Halt and the time we
// delivered it, the process could have already finished its
// job. Check that here:
const bool handle_interrupts = false;
if (auto result = HandleStoppedEvent(
expr_thread_id, thread_plan_sp, thread_plan_restorer,
event_sp, event_to_broadcast_sp, options,
handle_interrupts)) {
return_value = *result;
back_to_top = false;
break;
}
if (!options.GetTryAllThreads()) {
if (log)
log->PutCString("Process::RunThreadPlan(): try_all_threads "
"was false, we stopped so now we're "
"quitting.");
return_value = eExpressionInterrupted;
back_to_top = false;
break;
}
if (before_first_timeout) {
// Set all the other threads to run, and return to the top of
// the loop, which will continue;
before_first_timeout = false;
thread_plan_sp->SetStopOthers(false);
if (log)
log->PutCString(
"Process::RunThreadPlan(): about to resume.");
back_to_top = true;
break;
} else {
// Running all threads failed, so return Interrupted.
if (log)
log->PutCString("Process::RunThreadPlan(): running all "
"threads timed out.");
return_value = eExpressionInterrupted;
back_to_top = false;
break;
}
}
} else {
if (log)
log->PutCString("Process::RunThreadPlan(): halt said it "
"succeeded, but I got no event. "
"I'm getting out of here passing Interrupted.");
return_value = eExpressionInterrupted;
back_to_top = false;
break;
}
} else {
try_halt_again++;
continue;
}
}
if (!back_to_top || try_halt_again > num_retries)
break;
else
continue;
}
} // END WAIT LOOP
// If we had to start up a temporary private state thread to run this
// thread plan, shut it down now.
if (backup_private_state_thread.IsJoinable()) {
StopPrivateStateThread();
Status error;
m_private_state_thread = backup_private_state_thread;
if (stopper_base_plan_sp) {
thread->DiscardThreadPlansUpToPlan(stopper_base_plan_sp);
}
if (old_state != eStateInvalid)
m_public_state.SetValueNoLock(old_state);
}
// If our thread went away on us, we need to get out of here without
// doing any more work. We don't have to clean up the thread plan, that
// will have happened when the Thread was destroyed.
if (return_value == eExpressionThreadVanished) {
return return_value;
}
if (return_value != eExpressionCompleted && log) {
// Print a backtrace into the log so we can figure out where we are:
StreamString s;
s.PutCString("Thread state after unsuccessful completion: \n");
thread->GetStackFrameStatus(s, 0, UINT32_MAX, true, UINT32_MAX);
log->PutString(s.GetString());
}
// Restore the thread state if we are going to discard the plan execution.
// There are three cases where this could happen: 1) The execution
// successfully completed 2) We hit a breakpoint, and ignore_breakpoints
// was true 3) We got some other error, and discard_on_error was true
bool should_unwind = (return_value == eExpressionInterrupted &&
options.DoesUnwindOnError()) ||
(return_value == eExpressionHitBreakpoint &&
options.DoesIgnoreBreakpoints());
if (return_value == eExpressionCompleted || should_unwind) {
thread_plan_sp->RestoreThreadState();
}
// Now do some processing on the results of the run:
if (return_value == eExpressionInterrupted ||
return_value == eExpressionHitBreakpoint) {
if (log) {
StreamString s;
if (event_sp)
event_sp->Dump(&s);
else {
log->PutCString("Process::RunThreadPlan(): Stop event that "
"interrupted us is NULL.");
}
StreamString ts;
const char *event_explanation = nullptr;
do {
if (!event_sp) {
event_explanation = "<no event>";
break;
} else if (event_sp->GetType() == eBroadcastBitInterrupt) {
event_explanation = "<user interrupt>";
break;
} else {
const Process::ProcessEventData *event_data =
Process::ProcessEventData::GetEventDataFromEvent(
event_sp.get());
if (!event_data) {
event_explanation = "<no event data>";
break;
}
Process *process = event_data->GetProcessSP().get();
if (!process) {
event_explanation = "<no process>";
break;
}
ThreadList &thread_list = process->GetThreadList();
uint32_t num_threads = thread_list.GetSize();
uint32_t thread_index;
ts.Printf("<%u threads> ", num_threads);
for (thread_index = 0; thread_index < num_threads; ++thread_index) {
Thread *thread = thread_list.GetThreadAtIndex(thread_index).get();
if (!thread) {
ts.Printf("<?> ");
continue;
}
ts.Printf("<0x%4.4" PRIx64 " ", thread->GetID());
RegisterContext *register_context =
thread->GetRegisterContext().get();
if (register_context)
ts.Printf("[ip 0x%" PRIx64 "] ", register_context->GetPC());
else
ts.Printf("[ip unknown] ");
// Show the private stop info here, the public stop info will be
// from the last natural stop.
lldb::StopInfoSP stop_info_sp = thread->GetPrivateStopInfo();
if (stop_info_sp) {
const char *stop_desc = stop_info_sp->GetDescription();
if (stop_desc)
ts.PutCString(stop_desc);
}
ts.Printf(">");
}
event_explanation = ts.GetData();
}
} while (false);
if (event_explanation)
LLDB_LOGF(log,
"Process::RunThreadPlan(): execution interrupted: %s %s",
s.GetData(), event_explanation);
else
LLDB_LOGF(log, "Process::RunThreadPlan(): execution interrupted: %s",
s.GetData());
}
if (should_unwind) {
LLDB_LOGF(log,
"Process::RunThreadPlan: ExecutionInterrupted - "
"discarding thread plans up to %p.",
static_cast<void *>(thread_plan_sp.get()));
thread->DiscardThreadPlansUpToPlan(thread_plan_sp);
} else {
LLDB_LOGF(log,
"Process::RunThreadPlan: ExecutionInterrupted - for "
"plan: %p not discarding.",
static_cast<void *>(thread_plan_sp.get()));
}
} else if (return_value == eExpressionSetupError) {
if (log)
log->PutCString("Process::RunThreadPlan(): execution set up error.");
if (options.DoesUnwindOnError()) {
thread->DiscardThreadPlansUpToPlan(thread_plan_sp);
}
} else {
if (thread->IsThreadPlanDone(thread_plan_sp.get())) {
if (log)
log->PutCString("Process::RunThreadPlan(): thread plan is done");
return_value = eExpressionCompleted;
} else if (thread->WasThreadPlanDiscarded(thread_plan_sp.get())) {
if (log)
log->PutCString(
"Process::RunThreadPlan(): thread plan was discarded");
return_value = eExpressionDiscarded;
} else {
if (log)
log->PutCString(
"Process::RunThreadPlan(): thread plan stopped in mid course");
if (options.DoesUnwindOnError() && thread_plan_sp) {
if (log)
log->PutCString("Process::RunThreadPlan(): discarding thread plan "
"'cause unwind_on_error is set.");
thread->DiscardThreadPlansUpToPlan(thread_plan_sp);
}
}
}
// Thread we ran the function in may have gone away because we ran the
// target Check that it's still there, and if it is put it back in the
// context. Also restore the frame in the context if it is still present.
thread = GetThreadList().FindThreadByIndexID(thread_idx_id, true).get();
if (thread) {
exe_ctx.SetFrameSP(thread->GetFrameWithStackID(ctx_frame_id));
}
// Also restore the current process'es selected frame & thread, since this
// function calling may be done behind the user's back.
if (selected_tid != LLDB_INVALID_THREAD_ID) {
if (GetThreadList().SetSelectedThreadByIndexID(selected_tid) &&
selected_stack_id.IsValid()) {
// We were able to restore the selected thread, now restore the frame:
std::lock_guard<std::recursive_mutex> guard(GetThreadList().GetMutex());
StackFrameSP old_frame_sp =
GetThreadList().GetSelectedThread()->GetFrameWithStackID(
selected_stack_id);
if (old_frame_sp)
GetThreadList().GetSelectedThread()->SetSelectedFrame(
old_frame_sp.get());
}
}
}
// If the process exited during the run of the thread plan, notify everyone.
if (event_to_broadcast_sp) {
if (log)
log->PutCString("Process::RunThreadPlan(): rebroadcasting event.");
BroadcastEvent(event_to_broadcast_sp);
}
return return_value;
}
const char *Process::ExecutionResultAsCString(ExpressionResults result) {
const char *result_name = "<unknown>";
switch (result) {
case eExpressionCompleted:
result_name = "eExpressionCompleted";
break;
case eExpressionDiscarded:
result_name = "eExpressionDiscarded";
break;
case eExpressionInterrupted:
result_name = "eExpressionInterrupted";
break;
case eExpressionHitBreakpoint:
result_name = "eExpressionHitBreakpoint";
break;
case eExpressionSetupError:
result_name = "eExpressionSetupError";
break;
case eExpressionParseError:
result_name = "eExpressionParseError";
break;
case eExpressionResultUnavailable:
result_name = "eExpressionResultUnavailable";
break;
case eExpressionTimedOut:
result_name = "eExpressionTimedOut";
break;
case eExpressionStoppedForDebug:
result_name = "eExpressionStoppedForDebug";
break;
case eExpressionThreadVanished:
result_name = "eExpressionThreadVanished";
}
return result_name;
}
void Process::GetStatus(Stream &strm) {
const StateType state = GetState();
if (StateIsStoppedState(state, false)) {
if (state == eStateExited) {
int exit_status = GetExitStatus();
const char *exit_description = GetExitDescription();
strm.Printf("Process %" PRIu64 " exited with status = %i (0x%8.8x) %s\n",
GetID(), exit_status, exit_status,
exit_description ? exit_description : "");
} else {
if (state == eStateConnected)
strm.Printf("Connected to remote target.\n");
else
strm.Printf("Process %" PRIu64 " %s\n", GetID(), StateAsCString(state));
}
} else {
strm.Printf("Process %" PRIu64 " is running.\n", GetID());
}
}
size_t Process::GetThreadStatus(Stream &strm,
bool only_threads_with_stop_reason,
uint32_t start_frame, uint32_t num_frames,
uint32_t num_frames_with_source,
bool stop_format) {
size_t num_thread_infos_dumped = 0;
// You can't hold the thread list lock while calling Thread::GetStatus. That
// very well might run code (e.g. if we need it to get return values or
// arguments.) For that to work the process has to be able to acquire it.
// So instead copy the thread ID's, and look them up one by one:
uint32_t num_threads;
std::vector<lldb::tid_t> thread_id_array;
// Scope for thread list locker;
{
std::lock_guard<std::recursive_mutex> guard(GetThreadList().GetMutex());
ThreadList &curr_thread_list = GetThreadList();
num_threads = curr_thread_list.GetSize();
uint32_t idx;
thread_id_array.resize(num_threads);
for (idx = 0; idx < num_threads; ++idx)
thread_id_array[idx] = curr_thread_list.GetThreadAtIndex(idx)->GetID();
}
for (uint32_t i = 0; i < num_threads; i++) {
ThreadSP thread_sp(GetThreadList().FindThreadByID(thread_id_array[i]));
if (thread_sp) {
if (only_threads_with_stop_reason) {
StopInfoSP stop_info_sp = thread_sp->GetStopInfo();
if (!stop_info_sp || !stop_info_sp->IsValid())
continue;
}
thread_sp->GetStatus(strm, start_frame, num_frames,
num_frames_with_source,
stop_format);
++num_thread_infos_dumped;
} else {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log, "Process::GetThreadStatus - thread 0x" PRIu64
" vanished while running Thread::GetStatus.");
}
}
return num_thread_infos_dumped;
}
void Process::AddInvalidMemoryRegion(const LoadRange ®ion) {
m_memory_cache.AddInvalidRange(region.GetRangeBase(), region.GetByteSize());
}
bool Process::RemoveInvalidMemoryRange(const LoadRange ®ion) {
return m_memory_cache.RemoveInvalidRange(region.GetRangeBase(),
region.GetByteSize());
}
void Process::AddPreResumeAction(PreResumeActionCallback callback,
void *baton) {
m_pre_resume_actions.push_back(PreResumeCallbackAndBaton(callback, baton));
}
bool Process::RunPreResumeActions() {
bool result = true;
while (!m_pre_resume_actions.empty()) {
struct PreResumeCallbackAndBaton action = m_pre_resume_actions.back();
m_pre_resume_actions.pop_back();
bool this_result = action.callback(action.baton);
if (result)
result = this_result;
}
return result;
}
void Process::ClearPreResumeActions() { m_pre_resume_actions.clear(); }
void Process::ClearPreResumeAction(PreResumeActionCallback callback, void *baton)
{
PreResumeCallbackAndBaton element(callback, baton);
auto found_iter = std::find(m_pre_resume_actions.begin(), m_pre_resume_actions.end(), element);
if (found_iter != m_pre_resume_actions.end())
{
m_pre_resume_actions.erase(found_iter);
}
}
ProcessRunLock &Process::GetRunLock() {
if (m_private_state_thread.EqualsThread(Host::GetCurrentThread()))
return m_private_run_lock;
else
return m_public_run_lock;
}
bool Process::CurrentThreadIsPrivateStateThread()
{
return m_private_state_thread.EqualsThread(Host::GetCurrentThread());
}
void Process::Flush() {
m_thread_list.Flush();
m_extended_thread_list.Flush();
m_extended_thread_stop_id = 0;
m_queue_list.Clear();
m_queue_list_stop_id = 0;
}
lldb::addr_t Process::GetCodeAddressMask() {
if (uint32_t num_bits_setting = GetVirtualAddressableBits())
return ~((1ULL << num_bits_setting) - 1);
return m_code_address_mask;
}
lldb::addr_t Process::GetDataAddressMask() {
if (uint32_t num_bits_setting = GetVirtualAddressableBits())
return ~((1ULL << num_bits_setting) - 1);
return m_data_address_mask;
}
lldb::addr_t Process::GetHighmemCodeAddressMask() {
if (uint32_t num_bits_setting = GetHighmemVirtualAddressableBits())
return ~((1ULL << num_bits_setting) - 1);
if (m_highmem_code_address_mask)
return m_highmem_code_address_mask;
return GetCodeAddressMask();
}
lldb::addr_t Process::GetHighmemDataAddressMask() {
if (uint32_t num_bits_setting = GetHighmemVirtualAddressableBits())
return ~((1ULL << num_bits_setting) - 1);
if (m_highmem_data_address_mask)
return m_highmem_data_address_mask;
return GetDataAddressMask();
}
void Process::SetCodeAddressMask(lldb::addr_t code_address_mask) {
LLDB_LOG(GetLog(LLDBLog::Process),
"Setting Process code address mask to {0:x}", code_address_mask);
m_code_address_mask = code_address_mask;
}
void Process::SetDataAddressMask(lldb::addr_t data_address_mask) {
LLDB_LOG(GetLog(LLDBLog::Process),
"Setting Process data address mask to {0:x}", data_address_mask);
m_data_address_mask = data_address_mask;
}
void Process::SetHighmemCodeAddressMask(lldb::addr_t code_address_mask) {
LLDB_LOG(GetLog(LLDBLog::Process),
"Setting Process highmem code address mask to {0:x}",
code_address_mask);
m_highmem_code_address_mask = code_address_mask;
}
void Process::SetHighmemDataAddressMask(lldb::addr_t data_address_mask) {
LLDB_LOG(GetLog(LLDBLog::Process),
"Setting Process highmem data address mask to {0:x}",
data_address_mask);
m_highmem_data_address_mask = data_address_mask;
}
addr_t Process::FixCodeAddress(addr_t addr) {
if (ABISP abi_sp = GetABI())
addr = abi_sp->FixCodeAddress(addr);
return addr;
}
addr_t Process::FixDataAddress(addr_t addr) {
if (ABISP abi_sp = GetABI())
addr = abi_sp->FixDataAddress(addr);
return addr;
}
addr_t Process::FixAnyAddress(addr_t addr) {
if (ABISP abi_sp = GetABI())
addr = abi_sp->FixAnyAddress(addr);
return addr;
}
void Process::DidExec() {
Log *log = GetLog(LLDBLog::Process);
LLDB_LOGF(log, "Process::%s()", __FUNCTION__);
Target &target = GetTarget();
target.CleanupProcess();
target.ClearModules(false);
m_dynamic_checkers_up.reset();
m_abi_sp.reset();
m_system_runtime_up.reset();
m_os_up.reset();
m_dyld_up.reset();
m_jit_loaders_up.reset();
m_image_tokens.clear();
// After an exec, the inferior is a new process and these memory regions are
// no longer allocated.
m_allocated_memory_cache.Clear(/*deallocte_memory=*/false);
{
std::lock_guard<std::recursive_mutex> guard(m_language_runtimes_mutex);
m_language_runtimes.clear();
}
m_instrumentation_runtimes.clear();
m_thread_list.DiscardThreadPlans();
m_memory_cache.Clear(true);
DoDidExec();
CompleteAttach();
// Flush the process (threads and all stack frames) after running
// CompleteAttach() in case the dynamic loader loaded things in new
// locations.
Flush();
// After we figure out what was loaded/unloaded in CompleteAttach, we need to
// let the target know so it can do any cleanup it needs to.
target.DidExec();
}
addr_t Process::ResolveIndirectFunction(const Address *address, Status &error) {
if (address == nullptr) {
error.SetErrorString("Invalid address argument");
return LLDB_INVALID_ADDRESS;
}
addr_t function_addr = LLDB_INVALID_ADDRESS;
addr_t addr = address->GetLoadAddress(&GetTarget());
std::map<addr_t, addr_t>::const_iterator iter =
m_resolved_indirect_addresses.find(addr);
if (iter != m_resolved_indirect_addresses.end()) {
function_addr = (*iter).second;
} else {
if (!CallVoidArgVoidPtrReturn(address, function_addr)) {
Symbol *symbol = address->CalculateSymbolContextSymbol();
error.SetErrorStringWithFormat(
"Unable to call resolver for indirect function %s",
symbol ? symbol->GetName().AsCString() : "<UNKNOWN>");
function_addr = LLDB_INVALID_ADDRESS;
} else {
if (ABISP abi_sp = GetABI())
function_addr = abi_sp->FixCodeAddress(function_addr);
m_resolved_indirect_addresses.insert(
std::pair<addr_t, addr_t>(addr, function_addr));
}
}
return function_addr;
}
void Process::ModulesDidLoad(ModuleList &module_list) {
// Inform the system runtime of the modified modules.
SystemRuntime *sys_runtime = GetSystemRuntime();
if (sys_runtime)
sys_runtime->ModulesDidLoad(module_list);
GetJITLoaders().ModulesDidLoad(module_list);
// Give the instrumentation runtimes a chance to be created before informing
// them of the modified modules.
InstrumentationRuntime::ModulesDidLoad(module_list, this,
m_instrumentation_runtimes);
for (auto &runtime : m_instrumentation_runtimes)
runtime.second->ModulesDidLoad(module_list);
// Give the language runtimes a chance to be created before informing them of
// the modified modules.
for (const lldb::LanguageType lang_type : Language::GetSupportedLanguages()) {
if (LanguageRuntime *runtime = GetLanguageRuntime(lang_type))
runtime->ModulesDidLoad(module_list);
}
// If we don't have an operating system plug-in, try to load one since
// loading shared libraries might cause a new one to try and load
if (!m_os_up)
LoadOperatingSystemPlugin(false);
// Inform the structured-data plugins of the modified modules.
for (auto &pair : m_structured_data_plugin_map) {
if (pair.second)
pair.second->ModulesDidLoad(*this, module_list);
}
}
void Process::PrintWarningOptimization(const SymbolContext &sc) {
if (!GetWarningsOptimization())
return;
if (!sc.module_sp || !sc.function || !sc.function->GetIsOptimized())
return;
sc.module_sp->ReportWarningOptimization(GetTarget().GetDebugger().GetID());
}
void Process::PrintWarningUnsupportedLanguage(const SymbolContext &sc) {
if (!GetWarningsUnsupportedLanguage())
return;
if (!sc.module_sp)
return;
LanguageType language = sc.GetLanguage();
if (language == eLanguageTypeUnknown)
return;
LanguageSet plugins =
PluginManager::GetAllTypeSystemSupportedLanguagesForTypes();
if (plugins[language])
return;
sc.module_sp->ReportWarningUnsupportedLanguage(
language, GetTarget().GetDebugger().GetID());
}
bool Process::GetProcessInfo(ProcessInstanceInfo &info) {
info.Clear();
PlatformSP platform_sp = GetTarget().GetPlatform();
if (!platform_sp)
return false;
return platform_sp->GetProcessInfo(GetID(), info);
}
ThreadCollectionSP Process::GetHistoryThreads(lldb::addr_t addr) {
ThreadCollectionSP threads;
const MemoryHistorySP &memory_history =
MemoryHistory::FindPlugin(shared_from_this());
if (!memory_history) {
return threads;
}
threads = std::make_shared<ThreadCollection>(
memory_history->GetHistoryThreads(addr));
return threads;
}
InstrumentationRuntimeSP
Process::GetInstrumentationRuntime(lldb::InstrumentationRuntimeType type) {
InstrumentationRuntimeCollection::iterator pos;
pos = m_instrumentation_runtimes.find(type);
if (pos == m_instrumentation_runtimes.end()) {
return InstrumentationRuntimeSP();
} else
return (*pos).second;
}
bool Process::GetModuleSpec(const FileSpec &module_file_spec,
const ArchSpec &arch, ModuleSpec &module_spec) {
module_spec.Clear();
return false;
}
size_t Process::AddImageToken(lldb::addr_t image_ptr) {
m_image_tokens.push_back(image_ptr);
return m_image_tokens.size() - 1;
}
lldb::addr_t Process::GetImagePtrFromToken(size_t token) const {
if (token < m_image_tokens.size())
return m_image_tokens[token];
return LLDB_INVALID_IMAGE_TOKEN;
}
void Process::ResetImageToken(size_t token) {
if (token < m_image_tokens.size())
m_image_tokens[token] = LLDB_INVALID_IMAGE_TOKEN;
}
Address
Process::AdvanceAddressToNextBranchInstruction(Address default_stop_addr,
AddressRange range_bounds) {
Target &target = GetTarget();
DisassemblerSP disassembler_sp;
InstructionList *insn_list = nullptr;
Address retval = default_stop_addr;
if (!target.GetUseFastStepping())
return retval;
if (!default_stop_addr.IsValid())
return retval;
const char *plugin_name = nullptr;
const char *flavor = nullptr;
disassembler_sp = Disassembler::DisassembleRange(
target.GetArchitecture(), plugin_name, flavor, GetTarget(), range_bounds);
if (disassembler_sp)
insn_list = &disassembler_sp->GetInstructionList();
if (insn_list == nullptr) {
return retval;
}
size_t insn_offset =
insn_list->GetIndexOfInstructionAtAddress(default_stop_addr);
if (insn_offset == UINT32_MAX) {
return retval;
}
uint32_t branch_index = insn_list->GetIndexOfNextBranchInstruction(
insn_offset, false /* ignore_calls*/, nullptr);
if (branch_index == UINT32_MAX) {
return retval;
}
if (branch_index > insn_offset) {
Address next_branch_insn_address =
insn_list->GetInstructionAtIndex(branch_index)->GetAddress();
if (next_branch_insn_address.IsValid() &&
range_bounds.ContainsFileAddress(next_branch_insn_address)) {
retval = next_branch_insn_address;
}
}
return retval;
}
Status Process::GetMemoryRegionInfo(lldb::addr_t load_addr,
MemoryRegionInfo &range_info) {
if (const lldb::ABISP &abi = GetABI())
load_addr = abi->FixAnyAddress(load_addr);
return DoGetMemoryRegionInfo(load_addr, range_info);
}
Status Process::GetMemoryRegions(lldb_private::MemoryRegionInfos ®ion_list) {
Status error;
lldb::addr_t range_end = 0;
const lldb::ABISP &abi = GetABI();
region_list.clear();
do {
lldb_private::MemoryRegionInfo region_info;
error = GetMemoryRegionInfo(range_end, region_info);
// GetMemoryRegionInfo should only return an error if it is unimplemented.
if (error.Fail()) {
region_list.clear();
break;
}
// We only check the end address, not start and end, because we assume that
// the start will not have non-address bits until the first unmappable
// region. We will have exited the loop by that point because the previous
// region, the last mappable region, will have non-address bits in its end
// address.
range_end = region_info.GetRange().GetRangeEnd();
if (region_info.GetMapped() == MemoryRegionInfo::eYes) {
region_list.push_back(std::move(region_info));
}
} while (
// For a process with no non-address bits, all address bits
// set means the end of memory.
range_end != LLDB_INVALID_ADDRESS &&
// If we have non-address bits and some are set then the end
// is at or beyond the end of mappable memory.
!(abi && (abi->FixAnyAddress(range_end) != range_end)));
return error;
}
Status
Process::ConfigureStructuredData(llvm::StringRef type_name,
const StructuredData::ObjectSP &config_sp) {
// If you get this, the Process-derived class needs to implement a method to
// enable an already-reported asynchronous structured data feature. See
// ProcessGDBRemote for an example implementation over gdb-remote.
return Status("unimplemented");
}
void Process::MapSupportedStructuredDataPlugins(
const StructuredData::Array &supported_type_names) {
Log *log = GetLog(LLDBLog::Process);
// Bail out early if there are no type names to map.
if (supported_type_names.GetSize() == 0) {
LLDB_LOG(log, "no structured data types supported");
return;
}
// These StringRefs are backed by the input parameter.
std::set<llvm::StringRef> type_names;
LLDB_LOG(log,
"the process supports the following async structured data types:");
supported_type_names.ForEach(
[&type_names, &log](StructuredData::Object *object) {
// There shouldn't be null objects in the array.
if (!object)
return false;
// All type names should be strings.
const llvm::StringRef type_name = object->GetStringValue();
if (type_name.empty())
return false;
type_names.insert(type_name);
LLDB_LOG(log, "- {0}", type_name);
return true;
});
// For each StructuredDataPlugin, if the plugin handles any of the types in
// the supported_type_names, map that type name to that plugin. Stop when
// we've consumed all the type names.
// FIXME: should we return an error if there are type names nobody
// supports?
for (uint32_t plugin_index = 0; !type_names.empty(); plugin_index++) {
auto create_instance =
PluginManager::GetStructuredDataPluginCreateCallbackAtIndex(
plugin_index);
if (!create_instance)
break;
// Create the plugin.
StructuredDataPluginSP plugin_sp = (*create_instance)(*this);
if (!plugin_sp) {
// This plugin doesn't think it can work with the process. Move on to the
// next.
continue;
}
// For any of the remaining type names, map any that this plugin supports.
std::vector<llvm::StringRef> names_to_remove;
for (llvm::StringRef type_name : type_names) {
if (plugin_sp->SupportsStructuredDataType(type_name)) {
m_structured_data_plugin_map.insert(
std::make_pair(type_name, plugin_sp));
names_to_remove.push_back(type_name);
LLDB_LOG(log, "using plugin {0} for type name {1}",
plugin_sp->GetPluginName(), type_name);
}
}
// Remove the type names that were consumed by this plugin.
for (llvm::StringRef type_name : names_to_remove)
type_names.erase(type_name);
}
}
bool Process::RouteAsyncStructuredData(
const StructuredData::ObjectSP object_sp) {
// Nothing to do if there's no data.
if (!object_sp)
return false;
// The contract is this must be a dictionary, so we can look up the routing
// key via the top-level 'type' string value within the dictionary.
StructuredData::Dictionary *dictionary = object_sp->GetAsDictionary();
if (!dictionary)
return false;
// Grab the async structured type name (i.e. the feature/plugin name).
llvm::StringRef type_name;
if (!dictionary->GetValueForKeyAsString("type", type_name))
return false;
// Check if there's a plugin registered for this type name.
auto find_it = m_structured_data_plugin_map.find(type_name);
if (find_it == m_structured_data_plugin_map.end()) {
// We don't have a mapping for this structured data type.
return false;
}
// Route the structured data to the plugin.
find_it->second->HandleArrivalOfStructuredData(*this, type_name, object_sp);
return true;
}
Status Process::UpdateAutomaticSignalFiltering() {
// Default implementation does nothign.
// No automatic signal filtering to speak of.
return Status();
}
UtilityFunction *Process::GetLoadImageUtilityFunction(
Platform *platform,
llvm::function_ref<std::unique_ptr<UtilityFunction>()> factory) {
if (platform != GetTarget().GetPlatform().get())
return nullptr;
llvm::call_once(m_dlopen_utility_func_flag_once,
[&] { m_dlopen_utility_func_up = factory(); });
return m_dlopen_utility_func_up.get();
}
llvm::Expected<TraceSupportedResponse> Process::TraceSupported() {
if (!IsLiveDebugSession())
return llvm::createStringError(llvm::inconvertibleErrorCode(),
"Can't trace a non-live process.");
return llvm::make_error<UnimplementedError>();
}
bool Process::CallVoidArgVoidPtrReturn(const Address *address,
addr_t &returned_func,
bool trap_exceptions) {
Thread *thread = GetThreadList().GetExpressionExecutionThread().get();
if (thread == nullptr || address == nullptr)
return false;
EvaluateExpressionOptions options;
options.SetStopOthers(true);
options.SetUnwindOnError(true);
options.SetIgnoreBreakpoints(true);
options.SetTryAllThreads(true);
options.SetDebug(false);
options.SetTimeout(GetUtilityExpressionTimeout());
options.SetTrapExceptions(trap_exceptions);
auto type_system_or_err =
GetTarget().GetScratchTypeSystemForLanguage(eLanguageTypeC);
if (!type_system_or_err) {
llvm::consumeError(type_system_or_err.takeError());
return false;
}
auto ts = *type_system_or_err;
if (!ts)
return false;
CompilerType void_ptr_type =
ts->GetBasicTypeFromAST(eBasicTypeVoid).GetPointerType();
lldb::ThreadPlanSP call_plan_sp(new ThreadPlanCallFunction(
*thread, *address, void_ptr_type, llvm::ArrayRef<addr_t>(), options));
if (call_plan_sp) {
DiagnosticManager diagnostics;
StackFrame *frame = thread->GetStackFrameAtIndex(0).get();
if (frame) {
ExecutionContext exe_ctx;
frame->CalculateExecutionContext(exe_ctx);
ExpressionResults result =
RunThreadPlan(exe_ctx, call_plan_sp, options, diagnostics);
if (result == eExpressionCompleted) {
returned_func =
call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(
LLDB_INVALID_ADDRESS);
if (GetAddressByteSize() == 4) {
if (returned_func == UINT32_MAX)
return false;
} else if (GetAddressByteSize() == 8) {
if (returned_func == UINT64_MAX)
return false;
}
return true;
}
}
}
return false;
}
llvm::Expected<const MemoryTagManager *> Process::GetMemoryTagManager() {
Architecture *arch = GetTarget().GetArchitecturePlugin();
const MemoryTagManager *tag_manager =
arch ? arch->GetMemoryTagManager() : nullptr;
if (!arch || !tag_manager) {
return llvm::createStringError(
llvm::inconvertibleErrorCode(),
"This architecture does not support memory tagging");
}
if (!SupportsMemoryTagging()) {
return llvm::createStringError(llvm::inconvertibleErrorCode(),
"Process does not support memory tagging");
}
return tag_manager;
}
llvm::Expected<std::vector<lldb::addr_t>>
Process::ReadMemoryTags(lldb::addr_t addr, size_t len) {
llvm::Expected<const MemoryTagManager *> tag_manager_or_err =
GetMemoryTagManager();
if (!tag_manager_or_err)
return tag_manager_or_err.takeError();
const MemoryTagManager *tag_manager = *tag_manager_or_err;
llvm::Expected<std::vector<uint8_t>> tag_data =
DoReadMemoryTags(addr, len, tag_manager->GetAllocationTagType());
if (!tag_data)
return tag_data.takeError();
return tag_manager->UnpackTagsData(*tag_data,
len / tag_manager->GetGranuleSize());
}
Status Process::WriteMemoryTags(lldb::addr_t addr, size_t len,
const std::vector<lldb::addr_t> &tags) {
llvm::Expected<const MemoryTagManager *> tag_manager_or_err =
GetMemoryTagManager();
if (!tag_manager_or_err)
return Status(tag_manager_or_err.takeError());
const MemoryTagManager *tag_manager = *tag_manager_or_err;
llvm::Expected<std::vector<uint8_t>> packed_tags =
tag_manager->PackTags(tags);
if (!packed_tags) {
return Status(packed_tags.takeError());
}
return DoWriteMemoryTags(addr, len, tag_manager->GetAllocationTagType(),
*packed_tags);
}
// Create a CoreFileMemoryRange from a MemoryRegionInfo
static Process::CoreFileMemoryRange
CreateCoreFileMemoryRange(const MemoryRegionInfo ®ion) {
const addr_t addr = region.GetRange().GetRangeBase();
llvm::AddressRange range(addr, addr + region.GetRange().GetByteSize());
return {range, region.GetLLDBPermissions()};
}
// Add dirty pages to the core file ranges and return true if dirty pages
// were added. Return false if the dirty page information is not valid or in
// the region.
static bool AddDirtyPages(const MemoryRegionInfo ®ion,
Process::CoreFileMemoryRanges &ranges) {
const auto &dirty_page_list = region.GetDirtyPageList();
if (!dirty_page_list)
return false;
const uint32_t lldb_permissions = region.GetLLDBPermissions();
const addr_t page_size = region.GetPageSize();
if (page_size == 0)
return false;
llvm::AddressRange range(0, 0);
for (addr_t page_addr : *dirty_page_list) {
if (range.empty()) {
// No range yet, initialize the range with the current dirty page.
range = llvm::AddressRange(page_addr, page_addr + page_size);
} else {
if (range.end() == page_addr) {
// Combine consective ranges.
range = llvm::AddressRange(range.start(), page_addr + page_size);
} else {
// Add previous contiguous range and init the new range with the
// current dirty page.
ranges.push_back({range, lldb_permissions});
range = llvm::AddressRange(page_addr, page_addr + page_size);
}
}
}
// The last range
if (!range.empty())
ranges.push_back({range, lldb_permissions});
return true;
}
// Given a region, add the region to \a ranges.
//
// Only add the region if it isn't empty and if it has some permissions.
// If \a try_dirty_pages is true, then try to add only the dirty pages for a
// given region. If the region has dirty page information, only dirty pages
// will be added to \a ranges, else the entire range will be added to \a
// ranges.
static void AddRegion(const MemoryRegionInfo ®ion, bool try_dirty_pages,
Process::CoreFileMemoryRanges &ranges) {
// Don't add empty ranges or ranges with no permissions.
if (region.GetRange().GetByteSize() == 0 || region.GetLLDBPermissions() == 0)
return;
if (try_dirty_pages && AddDirtyPages(region, ranges))
return;
ranges.push_back(CreateCoreFileMemoryRange(region));
}
// Save all memory regions that are not empty or have at least some permissions
// for a full core file style.
static void GetCoreFileSaveRangesFull(Process &process,
const MemoryRegionInfos ®ions,
Process::CoreFileMemoryRanges &ranges) {
// Don't add only dirty pages, add full regions.
const bool try_dirty_pages = false;
for (const auto ®ion : regions)
AddRegion(region, try_dirty_pages, ranges);
}
// Save only the dirty pages to the core file. Make sure the process has at
// least some dirty pages, as some OS versions don't support reporting what
// pages are dirty within an memory region. If no memory regions have dirty
// page information fall back to saving out all ranges with write permissions.
static void
GetCoreFileSaveRangesDirtyOnly(Process &process,
const MemoryRegionInfos ®ions,
Process::CoreFileMemoryRanges &ranges) {
// Iterate over the regions and find all dirty pages.
bool have_dirty_page_info = false;
for (const auto ®ion : regions) {
if (AddDirtyPages(region, ranges))
have_dirty_page_info = true;
}
if (!have_dirty_page_info) {
// We didn't find support for reporting dirty pages from the process
// plug-in so fall back to any region with write access permissions.
const bool try_dirty_pages = false;
for (const auto ®ion : regions)
if (region.GetWritable() == MemoryRegionInfo::eYes)
AddRegion(region, try_dirty_pages, ranges);
}
}
// Save all thread stacks to the core file. Some OS versions support reporting
// when a memory region is stack related. We check on this information, but we
// also use the stack pointers of each thread and add those in case the OS
// doesn't support reporting stack memory. This function also attempts to only
// emit dirty pages from the stack if the memory regions support reporting
// dirty regions as this will make the core file smaller. If the process
// doesn't support dirty regions, then it will fall back to adding the full
// stack region.
static void
GetCoreFileSaveRangesStackOnly(Process &process,
const MemoryRegionInfos ®ions,
Process::CoreFileMemoryRanges &ranges) {
// Some platforms support annotating the region information that tell us that
// it comes from a thread stack. So look for those regions first.
// Keep track of which stack regions we have added
std::set<addr_t> stack_bases;
const bool try_dirty_pages = true;
for (const auto ®ion : regions) {
if (region.IsStackMemory() == MemoryRegionInfo::eYes) {
stack_bases.insert(region.GetRange().GetRangeBase());
AddRegion(region, try_dirty_pages, ranges);
}
}
// Also check with our threads and get the regions for their stack pointers
// and add those regions if not already added above.
for (lldb::ThreadSP thread_sp : process.GetThreadList().Threads()) {
if (!thread_sp)
continue;
StackFrameSP frame_sp = thread_sp->GetStackFrameAtIndex(0);
if (!frame_sp)
continue;
RegisterContextSP reg_ctx_sp = frame_sp->GetRegisterContext();
if (!reg_ctx_sp)
continue;
const addr_t sp = reg_ctx_sp->GetSP();
lldb_private::MemoryRegionInfo sp_region;
if (process.GetMemoryRegionInfo(sp, sp_region).Success()) {
// Only add this region if not already added above. If our stack pointer
// is pointing off in the weeds, we will want this range.
if (stack_bases.count(sp_region.GetRange().GetRangeBase()) == 0)
AddRegion(sp_region, try_dirty_pages, ranges);
}
}
}
Status Process::CalculateCoreFileSaveRanges(lldb::SaveCoreStyle core_style,
CoreFileMemoryRanges &ranges) {
lldb_private::MemoryRegionInfos regions;
Status err = GetMemoryRegions(regions);
if (err.Fail())
return err;
if (regions.empty())
return Status("failed to get any valid memory regions from the process");
switch (core_style) {
case eSaveCoreUnspecified:
err = Status("callers must set the core_style to something other than "
"eSaveCoreUnspecified");
break;
case eSaveCoreFull:
GetCoreFileSaveRangesFull(*this, regions, ranges);
break;
case eSaveCoreDirtyOnly:
GetCoreFileSaveRangesDirtyOnly(*this, regions, ranges);
break;
case eSaveCoreStackOnly:
GetCoreFileSaveRangesStackOnly(*this, regions, ranges);
break;
}
if (err.Fail())
return err;
if (ranges.empty())
return Status("no valid address ranges found for core style");
return Status(); // Success!
}
|