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
|
/* Print and select stack frames for GDB, the GNU debugger.
Copyright (C) 1986-2013 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "value.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "language.h"
#include "frame.h"
#include "gdbcmd.h"
#include "gdbcore.h"
#include "target.h"
#include "source.h"
#include "breakpoint.h"
#include "demangle.h"
#include "inferior.h"
#include "annotate.h"
#include "ui-out.h"
#include "block.h"
#include "stack.h"
#include "dictionary.h"
#include "exceptions.h"
#include "reggroups.h"
#include "regcache.h"
#include "solib.h"
#include "valprint.h"
#include "gdbthread.h"
#include "cp-support.h"
#include "disasm.h"
#include "inline-frame.h"
#include "linespec.h"
#include "cli/cli-utils.h"
#include "gdb_assert.h"
#include <ctype.h>
#include "gdb_string.h"
#include "psymtab.h"
#include "symfile.h"
#include "python/python.h"
void (*deprecated_selected_frame_level_changed_hook) (int);
/* The possible choices of "set print frame-arguments", and the value
of this setting. */
static const char *const print_frame_arguments_choices[] =
{"all", "scalars", "none", NULL};
static const char *print_frame_arguments = "scalars";
/* The possible choices of "set print entry-values", and the value
of this setting. */
const char print_entry_values_no[] = "no";
const char print_entry_values_only[] = "only";
const char print_entry_values_preferred[] = "preferred";
const char print_entry_values_if_needed[] = "if-needed";
const char print_entry_values_both[] = "both";
const char print_entry_values_compact[] = "compact";
const char print_entry_values_default[] = "default";
static const char *const print_entry_values_choices[] =
{
print_entry_values_no,
print_entry_values_only,
print_entry_values_preferred,
print_entry_values_if_needed,
print_entry_values_both,
print_entry_values_compact,
print_entry_values_default,
NULL
};
const char *print_entry_values = print_entry_values_default;
/* Prototypes for local functions. */
static void print_frame_local_vars (struct frame_info *, int,
struct ui_file *);
static void print_frame (struct frame_info *frame, int print_level,
enum print_what print_what, int print_args,
struct symtab_and_line sal);
static void set_last_displayed_sal (int valid,
struct program_space *pspace,
CORE_ADDR addr,
struct symtab *symtab,
int line);
/* Zero means do things normally; we are interacting directly with the
user. One means print the full filename and linenumber when a
frame is printed, and do so in a format emacs18/emacs19.22 can
parse. Two means print similar annotations, but in many more
cases and in a slightly different syntax. */
int annotation_level = 0;
/* These variables hold the last symtab and line we displayed to the user.
* This is where we insert a breakpoint or a skiplist entry by default. */
static int last_displayed_sal_valid = 0;
static struct program_space *last_displayed_pspace = 0;
static CORE_ADDR last_displayed_addr = 0;
static struct symtab *last_displayed_symtab = 0;
static int last_displayed_line = 0;
/* Return 1 if we should display the address in addition to the location,
because we are in the middle of a statement. */
static int
frame_show_address (struct frame_info *frame,
struct symtab_and_line sal)
{
/* If there is a line number, but no PC, then there is no location
information associated with this sal. The only way that should
happen is for the call sites of inlined functions (SAL comes from
find_frame_sal). Otherwise, we would have some PC range if the
SAL came from a line table. */
if (sal.line != 0 && sal.pc == 0 && sal.end == 0)
{
if (get_next_frame (frame) == NULL)
gdb_assert (inline_skipped_frames (inferior_ptid) > 0);
else
gdb_assert (get_frame_type (get_next_frame (frame)) == INLINE_FRAME);
return 0;
}
return get_frame_pc (frame) != sal.pc;
}
/* Show or print a stack frame FRAME briefly. The output is format
according to PRINT_LEVEL and PRINT_WHAT printing the frame's
relative level, function name, argument list, and file name and
line number. If the frame's PC is not at the beginning of the
source line, the actual PC is printed at the beginning. */
void
print_stack_frame (struct frame_info *frame, int print_level,
enum print_what print_what)
{
volatile struct gdb_exception e;
/* For mi, alway print location and address. */
if (ui_out_is_mi_like_p (current_uiout))
print_what = LOC_AND_ADDRESS;
TRY_CATCH (e, RETURN_MASK_ERROR)
{
int center = (print_what == SRC_LINE || print_what == SRC_AND_LOC);
print_frame_info (frame, print_level, print_what, 1 /* print_args */);
set_current_sal_from_frame (frame, center);
}
}
/* Print nameless arguments of frame FRAME on STREAM, where START is
the offset of the first nameless argument, and NUM is the number of
nameless arguments to print. FIRST is nonzero if this is the first
argument (not just the first nameless argument). */
static void
print_frame_nameless_args (struct frame_info *frame, long start, int num,
int first, struct ui_file *stream)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int i;
CORE_ADDR argsaddr;
long arg_value;
for (i = 0; i < num; i++)
{
QUIT;
argsaddr = get_frame_args_address (frame);
if (!argsaddr)
return;
arg_value = read_memory_integer (argsaddr + start,
sizeof (int), byte_order);
if (!first)
fprintf_filtered (stream, ", ");
fprintf_filtered (stream, "%ld", arg_value);
first = 0;
start += sizeof (int);
}
}
/* Print single argument of inferior function. ARG must be already
read in.
Errors are printed as if they would be the parameter value. Use zeroed ARG
iff it should not be printed accoring to user settings. */
static void
print_frame_arg (const struct frame_arg *arg)
{
struct ui_out *uiout = current_uiout;
volatile struct gdb_exception except;
struct cleanup *old_chain;
struct ui_file *stb;
stb = mem_fileopen ();
old_chain = make_cleanup_ui_file_delete (stb);
gdb_assert (!arg->val || !arg->error);
gdb_assert (arg->entry_kind == print_entry_values_no
|| arg->entry_kind == print_entry_values_only
|| (!ui_out_is_mi_like_p (uiout)
&& arg->entry_kind == print_entry_values_compact));
annotate_arg_begin ();
make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
fprintf_symbol_filtered (stb, SYMBOL_PRINT_NAME (arg->sym),
SYMBOL_LANGUAGE (arg->sym), DMGL_PARAMS | DMGL_ANSI);
if (arg->entry_kind == print_entry_values_compact)
{
/* It is OK to provide invalid MI-like stream as with
PRINT_ENTRY_VALUE_COMPACT we never use MI. */
fputs_filtered ("=", stb);
fprintf_symbol_filtered (stb, SYMBOL_PRINT_NAME (arg->sym),
SYMBOL_LANGUAGE (arg->sym),
DMGL_PARAMS | DMGL_ANSI);
}
if (arg->entry_kind == print_entry_values_only
|| arg->entry_kind == print_entry_values_compact)
fputs_filtered ("@entry", stb);
ui_out_field_stream (uiout, "name", stb);
annotate_arg_name_end ();
ui_out_text (uiout, "=");
if (!arg->val && !arg->error)
ui_out_text (uiout, "...");
else
{
if (arg->error)
except.message = arg->error;
else
{
/* TRY_CATCH has two statements, wrap it in a block. */
TRY_CATCH (except, RETURN_MASK_ERROR)
{
const struct language_defn *language;
struct value_print_options opts;
/* Avoid value_print because it will deref ref parameters. We
just want to print their addresses. Print ??? for args whose
address we do not know. We pass 2 as "recurse" to val_print
because our standard indentation here is 4 spaces, and
val_print indents 2 for each recurse. */
annotate_arg_value (value_type (arg->val));
/* Use the appropriate language to display our symbol, unless the
user forced the language to a specific language. */
if (language_mode == language_mode_auto)
language = language_def (SYMBOL_LANGUAGE (arg->sym));
else
language = current_language;
get_raw_print_options (&opts);
opts.deref_ref = 1;
/* True in "summary" mode, false otherwise. */
opts.summary = !strcmp (print_frame_arguments, "scalars");
common_val_print (arg->val, stb, 2, &opts, language);
}
}
if (except.message)
fprintf_filtered (stb, _("<error reading variable: %s>"),
except.message);
}
ui_out_field_stream (uiout, "value", stb);
/* Also invoke ui_out_tuple_end. */
do_cleanups (old_chain);
annotate_arg_end ();
}
/* Read in inferior function parameter SYM at FRAME into ARGP. Caller is
responsible for xfree of ARGP->ERROR. This function never throws an
exception. */
void
read_frame_arg (struct symbol *sym, struct frame_info *frame,
struct frame_arg *argp, struct frame_arg *entryargp)
{
struct value *val = NULL, *entryval = NULL;
char *val_error = NULL, *entryval_error = NULL;
int val_equal = 0;
volatile struct gdb_exception except;
if (print_entry_values != print_entry_values_only
&& print_entry_values != print_entry_values_preferred)
{
TRY_CATCH (except, RETURN_MASK_ERROR)
{
val = read_var_value (sym, frame);
}
if (!val)
{
val_error = alloca (strlen (except.message) + 1);
strcpy (val_error, except.message);
}
}
if (SYMBOL_COMPUTED_OPS (sym) != NULL
&& SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry != NULL
&& print_entry_values != print_entry_values_no
&& (print_entry_values != print_entry_values_if_needed
|| !val || value_optimized_out (val)))
{
TRY_CATCH (except, RETURN_MASK_ERROR)
{
const struct symbol_computed_ops *ops;
ops = SYMBOL_COMPUTED_OPS (sym);
entryval = ops->read_variable_at_entry (sym, frame);
}
if (!entryval)
{
entryval_error = alloca (strlen (except.message) + 1);
strcpy (entryval_error, except.message);
}
if (except.error == NO_ENTRY_VALUE_ERROR
|| (entryval && value_optimized_out (entryval)))
{
entryval = NULL;
entryval_error = NULL;
}
if (print_entry_values == print_entry_values_compact
|| print_entry_values == print_entry_values_default)
{
/* For MI do not try to use print_entry_values_compact for ARGP. */
if (val && entryval && !ui_out_is_mi_like_p (current_uiout))
{
struct type *type = value_type (val);
if (!value_optimized_out (val)
&& value_available_contents_eq (val, 0, entryval, 0,
TYPE_LENGTH (type)))
{
/* Initialize it just to avoid a GCC false warning. */
struct value *val_deref = NULL, *entryval_deref;
/* DW_AT_GNU_call_site_value does match with the current
value. If it is a reference still try to verify if
dereferenced DW_AT_GNU_call_site_data_value does not
differ. */
TRY_CATCH (except, RETURN_MASK_ERROR)
{
struct type *type_deref;
val_deref = coerce_ref (val);
if (value_lazy (val_deref))
value_fetch_lazy (val_deref);
type_deref = value_type (val_deref);
entryval_deref = coerce_ref (entryval);
if (value_lazy (entryval_deref))
value_fetch_lazy (entryval_deref);
/* If the reference addresses match but dereferenced
content does not match print them. */
if (val != val_deref
&& value_available_contents_eq (val_deref, 0,
entryval_deref, 0,
TYPE_LENGTH (type_deref)))
val_equal = 1;
}
/* Value was not a reference; and its content matches. */
if (val == val_deref)
val_equal = 1;
/* If the dereferenced content could not be fetched do not
display anything. */
else if (except.error == NO_ENTRY_VALUE_ERROR)
val_equal = 1;
else if (except.message)
{
entryval_error = alloca (strlen (except.message) + 1);
strcpy (entryval_error, except.message);
}
if (val_equal)
entryval = NULL;
}
}
/* Try to remove possibly duplicate error message for ENTRYARGP even
in MI mode. */
if (val_error && entryval_error
&& strcmp (val_error, entryval_error) == 0)
{
entryval_error = NULL;
/* Do not se VAL_EQUAL as the same error message may be shown for
the entry value even if no entry values are present in the
inferior. */
}
}
}
if (entryval == NULL)
{
if (print_entry_values == print_entry_values_preferred)
{
TRY_CATCH (except, RETURN_MASK_ERROR)
{
val = read_var_value (sym, frame);
}
if (!val)
{
val_error = alloca (strlen (except.message) + 1);
strcpy (val_error, except.message);
}
}
if (print_entry_values == print_entry_values_only
|| print_entry_values == print_entry_values_both
|| (print_entry_values == print_entry_values_preferred
&& (!val || value_optimized_out (val))))
entryval = allocate_optimized_out_value (SYMBOL_TYPE (sym));
}
if ((print_entry_values == print_entry_values_compact
|| print_entry_values == print_entry_values_if_needed
|| print_entry_values == print_entry_values_preferred)
&& (!val || value_optimized_out (val)) && entryval != NULL)
{
val = NULL;
val_error = NULL;
}
argp->sym = sym;
argp->val = val;
argp->error = val_error ? xstrdup (val_error) : NULL;
if (!val && !val_error)
argp->entry_kind = print_entry_values_only;
else if ((print_entry_values == print_entry_values_compact
|| print_entry_values == print_entry_values_default) && val_equal)
{
argp->entry_kind = print_entry_values_compact;
gdb_assert (!ui_out_is_mi_like_p (current_uiout));
}
else
argp->entry_kind = print_entry_values_no;
entryargp->sym = sym;
entryargp->val = entryval;
entryargp->error = entryval_error ? xstrdup (entryval_error) : NULL;
if (!entryval && !entryval_error)
entryargp->entry_kind = print_entry_values_no;
else
entryargp->entry_kind = print_entry_values_only;
}
/* Print the arguments of frame FRAME on STREAM, given the function
FUNC running in that frame (as a symbol), where NUM is the number
of arguments according to the stack frame (or -1 if the number of
arguments is unknown). */
/* Note that currently the "number of arguments according to the
stack frame" is only known on VAX where i refers to the "number of
ints of arguments according to the stack frame". */
static void
print_frame_args (struct symbol *func, struct frame_info *frame,
int num, struct ui_file *stream)
{
struct ui_out *uiout = current_uiout;
int first = 1;
/* Offset of next stack argument beyond the one we have seen that is
at the highest offset, or -1 if we haven't come to a stack
argument yet. */
long highest_offset = -1;
/* Number of ints of arguments that we have printed so far. */
int args_printed = 0;
struct cleanup *old_chain;
struct ui_file *stb;
/* True if we should print arguments, false otherwise. */
int print_args = strcmp (print_frame_arguments, "none");
stb = mem_fileopen ();
old_chain = make_cleanup_ui_file_delete (stb);
if (func)
{
struct block *b = SYMBOL_BLOCK_VALUE (func);
struct block_iterator iter;
struct symbol *sym;
ALL_BLOCK_SYMBOLS (b, iter, sym)
{
struct frame_arg arg, entryarg;
QUIT;
/* Keep track of the highest stack argument offset seen, and
skip over any kinds of symbols we don't care about. */
if (!SYMBOL_IS_ARGUMENT (sym))
continue;
switch (SYMBOL_CLASS (sym))
{
case LOC_ARG:
case LOC_REF_ARG:
{
long current_offset = SYMBOL_VALUE (sym);
int arg_size = TYPE_LENGTH (SYMBOL_TYPE (sym));
/* Compute address of next argument by adding the size of
this argument and rounding to an int boundary. */
current_offset =
((current_offset + arg_size + sizeof (int) - 1)
& ~(sizeof (int) - 1));
/* If this is the highest offset seen yet, set
highest_offset. */
if (highest_offset == -1
|| (current_offset > highest_offset))
highest_offset = current_offset;
/* Add the number of ints we're about to print to
args_printed. */
args_printed += (arg_size + sizeof (int) - 1) / sizeof (int);
}
/* We care about types of symbols, but don't need to
keep track of stack offsets in them. */
case LOC_REGISTER:
case LOC_REGPARM_ADDR:
case LOC_COMPUTED:
case LOC_OPTIMIZED_OUT:
default:
break;
}
/* We have to look up the symbol because arguments can have
two entries (one a parameter, one a local) and the one we
want is the local, which lookup_symbol will find for us.
This includes gcc1 (not gcc2) on SPARC when passing a
small structure and gcc2 when the argument type is float
and it is passed as a double and converted to float by
the prologue (in the latter case the type of the LOC_ARG
symbol is double and the type of the LOC_LOCAL symbol is
float). */
/* But if the parameter name is null, don't try it. Null
parameter names occur on the RS/6000, for traceback
tables. FIXME, should we even print them? */
if (*SYMBOL_LINKAGE_NAME (sym))
{
struct symbol *nsym;
nsym = lookup_symbol (SYMBOL_LINKAGE_NAME (sym),
b, VAR_DOMAIN, NULL);
gdb_assert (nsym != NULL);
if (SYMBOL_CLASS (nsym) == LOC_REGISTER
&& !SYMBOL_IS_ARGUMENT (nsym))
{
/* There is a LOC_ARG/LOC_REGISTER pair. This means
that it was passed on the stack and loaded into a
register, or passed in a register and stored in a
stack slot. GDB 3.x used the LOC_ARG; GDB
4.0-4.11 used the LOC_REGISTER.
Reasons for using the LOC_ARG:
(1) Because find_saved_registers may be slow for
remote debugging.
(2) Because registers are often re-used and stack
slots rarely (never?) are. Therefore using
the stack slot is much less likely to print
garbage.
Reasons why we might want to use the LOC_REGISTER:
(1) So that the backtrace prints the same value
as "print foo". I see no compelling reason
why this needs to be the case; having the
backtrace print the value which was passed
in, and "print foo" print the value as
modified within the called function, makes
perfect sense to me.
Additional note: It might be nice if "info args"
displayed both values.
One more note: There is a case with SPARC
structure passing where we need to use the
LOC_REGISTER, but this is dealt with by creating
a single LOC_REGPARM in symbol reading. */
/* Leave sym (the LOC_ARG) alone. */
;
}
else
sym = nsym;
}
/* Print the current arg. */
if (!first)
ui_out_text (uiout, ", ");
ui_out_wrap_hint (uiout, " ");
if (!print_args)
{
memset (&arg, 0, sizeof (arg));
arg.sym = sym;
arg.entry_kind = print_entry_values_no;
memset (&entryarg, 0, sizeof (entryarg));
entryarg.sym = sym;
entryarg.entry_kind = print_entry_values_no;
}
else
read_frame_arg (sym, frame, &arg, &entryarg);
if (arg.entry_kind != print_entry_values_only)
print_frame_arg (&arg);
if (entryarg.entry_kind != print_entry_values_no)
{
if (arg.entry_kind != print_entry_values_only)
{
ui_out_text (uiout, ", ");
ui_out_wrap_hint (uiout, " ");
}
print_frame_arg (&entryarg);
}
xfree (arg.error);
xfree (entryarg.error);
first = 0;
}
}
/* Don't print nameless args in situations where we don't know
enough about the stack to find them. */
if (num != -1)
{
long start;
if (highest_offset == -1)
start = gdbarch_frame_args_skip (get_frame_arch (frame));
else
start = highest_offset;
print_frame_nameless_args (frame, start, num - args_printed,
first, stream);
}
do_cleanups (old_chain);
}
/* Set the current source and line to the location given by frame
FRAME, if possible. When CENTER is true, adjust so the relevant
line is in the center of the next 'list'. */
void
set_current_sal_from_frame (struct frame_info *frame, int center)
{
struct symtab_and_line sal;
find_frame_sal (frame, &sal);
if (sal.symtab)
{
if (center)
sal.line = max (sal.line - get_lines_to_list () / 2, 1);
set_current_source_symtab_and_line (&sal);
}
}
/* If ON, GDB will display disassembly of the next source line when
execution of the program being debugged stops.
If AUTO (which is the default), or there's no line info to determine
the source line of the next instruction, display disassembly of next
instruction instead. */
static enum auto_boolean disassemble_next_line;
static void
show_disassemble_next_line (struct ui_file *file, int from_tty,
struct cmd_list_element *c,
const char *value)
{
fprintf_filtered (file,
_("Debugger's willingness to use "
"disassemble-next-line is %s.\n"),
value);
}
/* Use TRY_CATCH to catch the exception from the gdb_disassembly
because it will be broken by filter sometime. */
static void
do_gdb_disassembly (struct gdbarch *gdbarch,
int how_many, CORE_ADDR low, CORE_ADDR high)
{
volatile struct gdb_exception exception;
TRY_CATCH (exception, RETURN_MASK_ERROR)
{
gdb_disassembly (gdbarch, current_uiout, 0,
DISASSEMBLY_RAW_INSN, how_many,
low, high);
}
if (exception.reason < 0)
{
/* If an exception was thrown while doing the disassembly, print
the error message, to give the user a clue of what happened. */
exception_print (gdb_stderr, exception);
}
}
/* Print information about frame FRAME. The output is format according
to PRINT_LEVEL and PRINT_WHAT and PRINT_ARGS. The meaning of
PRINT_WHAT is:
SRC_LINE: Print only source line.
LOCATION: Print only location.
LOC_AND_SRC: Print location and source line.
Used in "where" output, and to emit breakpoint or step
messages. */
void
print_frame_info (struct frame_info *frame, int print_level,
enum print_what print_what, int print_args)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
struct symtab_and_line sal;
int source_print;
int location_print;
struct ui_out *uiout = current_uiout;
if (get_frame_type (frame) == DUMMY_FRAME
|| get_frame_type (frame) == SIGTRAMP_FRAME
|| get_frame_type (frame) == ARCH_FRAME)
{
struct cleanup *uiout_cleanup
= make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
annotate_frame_begin (print_level ? frame_relative_level (frame) : 0,
gdbarch, get_frame_pc (frame));
/* Do this regardless of SOURCE because we don't have any source
to list for this frame. */
if (print_level)
{
ui_out_text (uiout, "#");
ui_out_field_fmt_int (uiout, 2, ui_left, "level",
frame_relative_level (frame));
}
if (ui_out_is_mi_like_p (uiout))
{
annotate_frame_address ();
ui_out_field_core_addr (uiout, "addr",
gdbarch, get_frame_pc (frame));
annotate_frame_address_end ();
}
if (get_frame_type (frame) == DUMMY_FRAME)
{
annotate_function_call ();
ui_out_field_string (uiout, "func", "<function called from gdb>");
}
else if (get_frame_type (frame) == SIGTRAMP_FRAME)
{
annotate_signal_handler_caller ();
ui_out_field_string (uiout, "func", "<signal handler called>");
}
else if (get_frame_type (frame) == ARCH_FRAME)
{
ui_out_field_string (uiout, "func", "<cross-architecture call>");
}
ui_out_text (uiout, "\n");
annotate_frame_end ();
do_cleanups (uiout_cleanup);
return;
}
/* If FRAME is not the innermost frame, that normally means that
FRAME->pc points to *after* the call instruction, and we want to
get the line containing the call, never the next line. But if
the next frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the
next frame was not entered as the result of a call, and we want
to get the line containing FRAME->pc. */
find_frame_sal (frame, &sal);
location_print = (print_what == LOCATION
|| print_what == LOC_AND_ADDRESS
|| print_what == SRC_AND_LOC);
if (location_print || !sal.symtab)
print_frame (frame, print_level, print_what, print_args, sal);
source_print = (print_what == SRC_LINE || print_what == SRC_AND_LOC);
/* If disassemble-next-line is set to auto or on and doesn't have
the line debug messages for $pc, output the next instruction. */
if ((disassemble_next_line == AUTO_BOOLEAN_AUTO
|| disassemble_next_line == AUTO_BOOLEAN_TRUE)
&& source_print && !sal.symtab)
do_gdb_disassembly (get_frame_arch (frame), 1,
get_frame_pc (frame), get_frame_pc (frame) + 1);
if (source_print && sal.symtab)
{
int done = 0;
int mid_statement = ((print_what == SRC_LINE)
&& frame_show_address (frame, sal));
if (annotation_level)
done = identify_source_line (sal.symtab, sal.line, mid_statement,
get_frame_pc (frame));
if (!done)
{
if (deprecated_print_frame_info_listing_hook)
deprecated_print_frame_info_listing_hook (sal.symtab,
sal.line,
sal.line + 1, 0);
else
{
struct value_print_options opts;
get_user_print_options (&opts);
/* We used to do this earlier, but that is clearly
wrong. This function is used by many different
parts of gdb, including normal_stop in infrun.c,
which uses this to print out the current PC
when we stepi/nexti into the middle of a source
line. Only the command line really wants this
behavior. Other UIs probably would like the
ability to decide for themselves if it is desired. */
if (opts.addressprint && mid_statement)
{
ui_out_field_core_addr (uiout, "addr",
gdbarch, get_frame_pc (frame));
ui_out_text (uiout, "\t");
}
print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
}
}
/* If disassemble-next-line is set to on and there is line debug
messages, output assembly codes for next line. */
if (disassemble_next_line == AUTO_BOOLEAN_TRUE)
do_gdb_disassembly (get_frame_arch (frame), -1, sal.pc, sal.end);
}
if (print_what != LOCATION)
{
CORE_ADDR pc;
if (get_frame_pc_if_available (frame, &pc))
set_last_displayed_sal (1, sal.pspace, pc, sal.symtab, sal.line);
else
set_last_displayed_sal (0, 0, 0, 0, 0);
}
annotate_frame_end ();
gdb_flush (gdb_stdout);
}
/* Remember the last symtab and line we displayed, which we use e.g.
* as the place to put a breakpoint when the `break' command is
* invoked with no arguments. */
static void
set_last_displayed_sal (int valid, struct program_space *pspace,
CORE_ADDR addr, struct symtab *symtab,
int line)
{
last_displayed_sal_valid = valid;
last_displayed_pspace = pspace;
last_displayed_addr = addr;
last_displayed_symtab = symtab;
last_displayed_line = line;
if (valid && pspace == NULL)
{
clear_last_displayed_sal ();
internal_error (__FILE__, __LINE__,
_("Trying to set NULL pspace."));
}
}
/* Forget the last sal we displayed. */
void
clear_last_displayed_sal (void)
{
last_displayed_sal_valid = 0;
last_displayed_pspace = 0;
last_displayed_addr = 0;
last_displayed_symtab = 0;
last_displayed_line = 0;
}
/* Is our record of the last sal we displayed valid? If not,
* the get_last_displayed_* functions will return NULL or 0, as
* appropriate. */
int
last_displayed_sal_is_valid (void)
{
return last_displayed_sal_valid;
}
/* Get the pspace of the last sal we displayed, if it's valid. */
struct program_space *
get_last_displayed_pspace (void)
{
if (last_displayed_sal_valid)
return last_displayed_pspace;
return 0;
}
/* Get the address of the last sal we displayed, if it's valid. */
CORE_ADDR
get_last_displayed_addr (void)
{
if (last_displayed_sal_valid)
return last_displayed_addr;
return 0;
}
/* Get the symtab of the last sal we displayed, if it's valid. */
struct symtab*
get_last_displayed_symtab (void)
{
if (last_displayed_sal_valid)
return last_displayed_symtab;
return 0;
}
/* Get the line of the last sal we displayed, if it's valid. */
int
get_last_displayed_line (void)
{
if (last_displayed_sal_valid)
return last_displayed_line;
return 0;
}
/* Get the last sal we displayed, if it's valid. */
void
get_last_displayed_sal (struct symtab_and_line *sal)
{
if (last_displayed_sal_valid)
{
sal->pspace = last_displayed_pspace;
sal->pc = last_displayed_addr;
sal->symtab = last_displayed_symtab;
sal->line = last_displayed_line;
}
else
{
sal->pspace = 0;
sal->pc = 0;
sal->symtab = 0;
sal->line = 0;
}
}
/* Attempt to obtain the FUNNAME, FUNLANG and optionally FUNCP of the function
corresponding to FRAME. FUNNAME needs to be freed by the caller. */
void
find_frame_funname (struct frame_info *frame, char **funname,
enum language *funlang, struct symbol **funcp)
{
struct symbol *func;
*funname = NULL;
*funlang = language_unknown;
if (funcp)
*funcp = NULL;
func = get_frame_function (frame);
if (func)
{
/* In certain pathological cases, the symtabs give the wrong
function (when we are in the first function in a file which
is compiled without debugging symbols, the previous function
is compiled with debugging symbols, and the "foo.o" symbol
that is supposed to tell us where the file with debugging
symbols ends has been truncated by ar because it is longer
than 15 characters). This also occurs if the user uses asm()
to create a function but not stabs for it (in a file compiled
with -g).
So look in the minimal symbol tables as well, and if it comes
up with a larger address for the function use that instead.
I don't think this can ever cause any problems; there
shouldn't be any minimal symbols in the middle of a function;
if this is ever changed many parts of GDB will need to be
changed (and we'll create a find_pc_minimal_function or some
such). */
struct bound_minimal_symbol msymbol;
/* Don't attempt to do this for inlined functions, which do not
have a corresponding minimal symbol. */
if (!block_inlined_p (SYMBOL_BLOCK_VALUE (func)))
msymbol
= lookup_minimal_symbol_by_pc (get_frame_address_in_block (frame));
else
memset (&msymbol, 0, sizeof (msymbol));
if (msymbol.minsym != NULL
&& (SYMBOL_VALUE_ADDRESS (msymbol.minsym)
> BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
{
/* We also don't know anything about the function besides
its address and name. */
func = 0;
*funname = xstrdup (SYMBOL_PRINT_NAME (msymbol.minsym));
*funlang = SYMBOL_LANGUAGE (msymbol.minsym);
}
else
{
*funname = xstrdup (SYMBOL_PRINT_NAME (func));
*funlang = SYMBOL_LANGUAGE (func);
if (funcp)
*funcp = func;
if (*funlang == language_cplus)
{
/* It seems appropriate to use SYMBOL_PRINT_NAME() here,
to display the demangled name that we already have
stored in the symbol table, but we stored a version
with DMGL_PARAMS turned on, and here we don't want to
display parameters. So remove the parameters. */
char *func_only = cp_remove_params (*funname);
if (func_only)
{
xfree (*funname);
*funname = func_only;
}
}
}
}
else
{
struct bound_minimal_symbol msymbol;
CORE_ADDR pc;
if (!get_frame_address_in_block_if_available (frame, &pc))
return;
msymbol = lookup_minimal_symbol_by_pc (pc);
if (msymbol.minsym != NULL)
{
*funname = xstrdup (SYMBOL_PRINT_NAME (msymbol.minsym));
*funlang = SYMBOL_LANGUAGE (msymbol.minsym);
}
}
}
static void
print_frame (struct frame_info *frame, int print_level,
enum print_what print_what, int print_args,
struct symtab_and_line sal)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
struct ui_out *uiout = current_uiout;
char *funname = NULL;
enum language funlang = language_unknown;
struct ui_file *stb;
struct cleanup *old_chain, *list_chain;
struct value_print_options opts;
struct symbol *func;
CORE_ADDR pc = 0;
int pc_p;
pc_p = get_frame_pc_if_available (frame, &pc);
stb = mem_fileopen ();
old_chain = make_cleanup_ui_file_delete (stb);
find_frame_funname (frame, &funname, &funlang, &func);
make_cleanup (xfree, funname);
annotate_frame_begin (print_level ? frame_relative_level (frame) : 0,
gdbarch, pc);
list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
if (print_level)
{
ui_out_text (uiout, "#");
ui_out_field_fmt_int (uiout, 2, ui_left, "level",
frame_relative_level (frame));
}
get_user_print_options (&opts);
if (opts.addressprint)
if (!sal.symtab
|| frame_show_address (frame, sal)
|| print_what == LOC_AND_ADDRESS)
{
annotate_frame_address ();
if (pc_p)
ui_out_field_core_addr (uiout, "addr", gdbarch, pc);
else
ui_out_field_string (uiout, "addr", "<unavailable>");
annotate_frame_address_end ();
ui_out_text (uiout, " in ");
}
annotate_frame_function_name ();
fprintf_symbol_filtered (stb, funname ? funname : "??",
funlang, DMGL_ANSI);
ui_out_field_stream (uiout, "func", stb);
ui_out_wrap_hint (uiout, " ");
annotate_frame_args ();
ui_out_text (uiout, " (");
if (print_args)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
int numargs;
struct cleanup *args_list_chain;
volatile struct gdb_exception e;
if (gdbarch_frame_num_args_p (gdbarch))
{
numargs = gdbarch_frame_num_args (gdbarch, frame);
gdb_assert (numargs >= 0);
}
else
numargs = -1;
args_list_chain = make_cleanup_ui_out_list_begin_end (uiout, "args");
TRY_CATCH (e, RETURN_MASK_ERROR)
{
print_frame_args (func, frame, numargs, gdb_stdout);
}
/* FIXME: ARGS must be a list. If one argument is a string it
will have " that will not be properly escaped. */
/* Invoke ui_out_tuple_end. */
do_cleanups (args_list_chain);
QUIT;
}
ui_out_text (uiout, ")");
if (sal.symtab)
{
const char *filename_display;
filename_display = symtab_to_filename_for_display (sal.symtab);
annotate_frame_source_begin ();
ui_out_wrap_hint (uiout, " ");
ui_out_text (uiout, " at ");
annotate_frame_source_file ();
ui_out_field_string (uiout, "file", filename_display);
if (ui_out_is_mi_like_p (uiout))
{
const char *fullname = symtab_to_fullname (sal.symtab);
ui_out_field_string (uiout, "fullname", fullname);
}
annotate_frame_source_file_end ();
ui_out_text (uiout, ":");
annotate_frame_source_line ();
ui_out_field_int (uiout, "line", sal.line);
annotate_frame_source_end ();
}
if (pc_p && (funname == NULL || sal.symtab == NULL))
{
char *lib = solib_name_from_address (get_frame_program_space (frame),
get_frame_pc (frame));
if (lib)
{
annotate_frame_where ();
ui_out_wrap_hint (uiout, " ");
ui_out_text (uiout, " from ");
ui_out_field_string (uiout, "from", lib);
}
}
/* do_cleanups will call ui_out_tuple_end() for us. */
do_cleanups (list_chain);
ui_out_text (uiout, "\n");
do_cleanups (old_chain);
}
/* Read a frame specification in whatever the appropriate format is
from FRAME_EXP. Call error(), printing MESSAGE, if the
specification is in any way invalid (so this function never returns
NULL). When SEPECTED_P is non-NULL set its target to indicate that
the default selected frame was used. */
static struct frame_info *
parse_frame_specification_1 (const char *frame_exp, const char *message,
int *selected_frame_p)
{
int numargs;
struct value *args[4];
CORE_ADDR addrs[ARRAY_SIZE (args)];
if (frame_exp == NULL)
numargs = 0;
else
{
numargs = 0;
while (1)
{
char *addr_string;
struct cleanup *cleanup;
const char *p;
/* Skip leading white space, bail of EOL. */
frame_exp = skip_spaces_const (frame_exp);
if (!*frame_exp)
break;
/* Parse the argument, extract it, save it. */
for (p = frame_exp;
*p && !isspace (*p);
p++);
addr_string = savestring (frame_exp, p - frame_exp);
frame_exp = p;
cleanup = make_cleanup (xfree, addr_string);
/* NOTE: Parse and evaluate expression, but do not use
functions such as parse_and_eval_long or
parse_and_eval_address to also extract the value.
Instead value_as_long and value_as_address are used.
This avoids problems with expressions that contain
side-effects. */
if (numargs >= ARRAY_SIZE (args))
error (_("Too many args in frame specification"));
args[numargs++] = parse_and_eval (addr_string);
do_cleanups (cleanup);
}
}
/* If no args, default to the selected frame. */
if (numargs == 0)
{
if (selected_frame_p != NULL)
(*selected_frame_p) = 1;
return get_selected_frame (message);
}
/* None of the remaining use the selected frame. */
if (selected_frame_p != NULL)
(*selected_frame_p) = 0;
/* Assume the single arg[0] is an integer, and try using that to
select a frame relative to current. */
if (numargs == 1)
{
struct frame_info *fid;
int level = value_as_long (args[0]);
fid = find_relative_frame (get_current_frame (), &level);
if (level == 0)
/* find_relative_frame was successful. */
return fid;
}
/* Convert each value into a corresponding address. */
{
int i;
for (i = 0; i < numargs; i++)
addrs[i] = value_as_address (args[i]);
}
/* Assume that the single arg[0] is an address, use that to identify
a frame with a matching ID. Should this also accept stack/pc or
stack/pc/special. */
if (numargs == 1)
{
struct frame_id id = frame_id_build_wild (addrs[0]);
struct frame_info *fid;
/* If (s)he specifies the frame with an address, he deserves
what (s)he gets. Still, give the highest one that matches.
(NOTE: cagney/2004-10-29: Why highest, or outer-most, I don't
know). */
for (fid = get_current_frame ();
fid != NULL;
fid = get_prev_frame (fid))
{
if (frame_id_eq (id, get_frame_id (fid)))
{
struct frame_info *prev_frame;
while (1)
{
prev_frame = get_prev_frame (fid);
if (!prev_frame
|| !frame_id_eq (id, get_frame_id (prev_frame)))
break;
fid = prev_frame;
}
return fid;
}
}
}
/* We couldn't identify the frame as an existing frame, but
perhaps we can create one with a single argument. */
if (numargs == 1)
return create_new_frame (addrs[0], 0);
else if (numargs == 2)
return create_new_frame (addrs[0], addrs[1]);
else
error (_("Too many args in frame specification"));
}
static struct frame_info *
parse_frame_specification (char *frame_exp)
{
return parse_frame_specification_1 (frame_exp, NULL, NULL);
}
/* Print verbosely the selected frame or the frame at address
ADDR_EXP. Absolutely all information in the frame is printed. */
static void
frame_info (char *addr_exp, int from_tty)
{
struct frame_info *fi;
struct symtab_and_line sal;
struct symbol *func;
struct symtab *s;
struct frame_info *calling_frame_info;
int numregs;
const char *funname = 0;
enum language funlang = language_unknown;
const char *pc_regname;
int selected_frame_p;
struct gdbarch *gdbarch;
struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
CORE_ADDR frame_pc;
int frame_pc_p;
CORE_ADDR caller_pc;
fi = parse_frame_specification_1 (addr_exp, "No stack.", &selected_frame_p);
gdbarch = get_frame_arch (fi);
/* Name of the value returned by get_frame_pc(). Per comments, "pc"
is not a good name. */
if (gdbarch_pc_regnum (gdbarch) >= 0)
/* OK, this is weird. The gdbarch_pc_regnum hardware register's value can
easily not match that of the internal value returned by
get_frame_pc(). */
pc_regname = gdbarch_register_name (gdbarch, gdbarch_pc_regnum (gdbarch));
else
/* But then, this is weird to. Even without gdbarch_pc_regnum, an
architectures will often have a hardware register called "pc",
and that register's value, again, can easily not match
get_frame_pc(). */
pc_regname = "pc";
frame_pc_p = get_frame_pc_if_available (fi, &frame_pc);
find_frame_sal (fi, &sal);
func = get_frame_function (fi);
s = sal.symtab;
if (func)
{
funname = SYMBOL_PRINT_NAME (func);
funlang = SYMBOL_LANGUAGE (func);
if (funlang == language_cplus)
{
/* It seems appropriate to use SYMBOL_PRINT_NAME() here,
to display the demangled name that we already have
stored in the symbol table, but we stored a version
with DMGL_PARAMS turned on, and here we don't want to
display parameters. So remove the parameters. */
char *func_only = cp_remove_params (funname);
if (func_only)
{
funname = func_only;
make_cleanup (xfree, func_only);
}
}
}
else if (frame_pc_p)
{
struct bound_minimal_symbol msymbol;
msymbol = lookup_minimal_symbol_by_pc (frame_pc);
if (msymbol.minsym != NULL)
{
funname = SYMBOL_PRINT_NAME (msymbol.minsym);
funlang = SYMBOL_LANGUAGE (msymbol.minsym);
}
}
calling_frame_info = get_prev_frame (fi);
if (selected_frame_p && frame_relative_level (fi) >= 0)
{
printf_filtered (_("Stack level %d, frame at "),
frame_relative_level (fi));
}
else
{
printf_filtered (_("Stack frame at "));
}
fputs_filtered (paddress (gdbarch, get_frame_base (fi)), gdb_stdout);
printf_filtered (":\n");
printf_filtered (" %s = ", pc_regname);
if (frame_pc_p)
fputs_filtered (paddress (gdbarch, get_frame_pc (fi)), gdb_stdout);
else
fputs_filtered ("<unavailable>", gdb_stdout);
wrap_here (" ");
if (funname)
{
printf_filtered (" in ");
fprintf_symbol_filtered (gdb_stdout, funname, funlang,
DMGL_ANSI | DMGL_PARAMS);
}
wrap_here (" ");
if (sal.symtab)
printf_filtered (" (%s:%d)", symtab_to_filename_for_display (sal.symtab),
sal.line);
puts_filtered ("; ");
wrap_here (" ");
printf_filtered ("saved %s ", pc_regname);
if (frame_unwind_caller_pc_if_available (fi, &caller_pc))
fputs_filtered (paddress (gdbarch, caller_pc), gdb_stdout);
else
fputs_filtered ("<unavailable>", gdb_stdout);
printf_filtered ("\n");
if (calling_frame_info == NULL)
{
enum unwind_stop_reason reason;
reason = get_frame_unwind_stop_reason (fi);
if (reason != UNWIND_NO_REASON)
printf_filtered (_(" Outermost frame: %s\n"),
frame_stop_reason_string (reason));
}
else if (get_frame_type (fi) == TAILCALL_FRAME)
puts_filtered (" tail call frame");
else if (get_frame_type (fi) == INLINE_FRAME)
printf_filtered (" inlined into frame %d",
frame_relative_level (get_prev_frame (fi)));
else
{
printf_filtered (" called by frame at ");
fputs_filtered (paddress (gdbarch, get_frame_base (calling_frame_info)),
gdb_stdout);
}
if (get_next_frame (fi) && calling_frame_info)
puts_filtered (",");
wrap_here (" ");
if (get_next_frame (fi))
{
printf_filtered (" caller of frame at ");
fputs_filtered (paddress (gdbarch, get_frame_base (get_next_frame (fi))),
gdb_stdout);
}
if (get_next_frame (fi) || calling_frame_info)
puts_filtered ("\n");
if (s)
printf_filtered (" source language %s.\n",
language_str (s->language));
{
/* Address of the argument list for this frame, or 0. */
CORE_ADDR arg_list = get_frame_args_address (fi);
/* Number of args for this frame, or -1 if unknown. */
int numargs;
if (arg_list == 0)
printf_filtered (" Arglist at unknown address.\n");
else
{
printf_filtered (" Arglist at ");
fputs_filtered (paddress (gdbarch, arg_list), gdb_stdout);
printf_filtered (",");
if (!gdbarch_frame_num_args_p (gdbarch))
{
numargs = -1;
puts_filtered (" args: ");
}
else
{
numargs = gdbarch_frame_num_args (gdbarch, fi);
gdb_assert (numargs >= 0);
if (numargs == 0)
puts_filtered (" no args.");
else if (numargs == 1)
puts_filtered (" 1 arg: ");
else
printf_filtered (" %d args: ", numargs);
}
print_frame_args (func, fi, numargs, gdb_stdout);
puts_filtered ("\n");
}
}
{
/* Address of the local variables for this frame, or 0. */
CORE_ADDR arg_list = get_frame_locals_address (fi);
if (arg_list == 0)
printf_filtered (" Locals at unknown address,");
else
{
printf_filtered (" Locals at ");
fputs_filtered (paddress (gdbarch, arg_list), gdb_stdout);
printf_filtered (",");
}
}
/* Print as much information as possible on the location of all the
registers. */
{
enum lval_type lval;
int optimized;
int unavailable;
CORE_ADDR addr;
int realnum;
int count;
int i;
int need_nl = 1;
/* The sp is special; what's displayed isn't the save address, but
the value of the previous frame's sp. This is a legacy thing,
at one stage the frame cached the previous frame's SP instead
of its address, hence it was easiest to just display the cached
value. */
if (gdbarch_sp_regnum (gdbarch) >= 0)
{
/* Find out the location of the saved stack pointer with out
actually evaluating it. */
frame_register_unwind (fi, gdbarch_sp_regnum (gdbarch),
&optimized, &unavailable, &lval, &addr,
&realnum, NULL);
if (!optimized && !unavailable && lval == not_lval)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int sp_size = register_size (gdbarch, gdbarch_sp_regnum (gdbarch));
gdb_byte value[MAX_REGISTER_SIZE];
CORE_ADDR sp;
frame_register_unwind (fi, gdbarch_sp_regnum (gdbarch),
&optimized, &unavailable, &lval, &addr,
&realnum, value);
/* NOTE: cagney/2003-05-22: This is assuming that the
stack pointer was packed as an unsigned integer. That
may or may not be valid. */
sp = extract_unsigned_integer (value, sp_size, byte_order);
printf_filtered (" Previous frame's sp is ");
fputs_filtered (paddress (gdbarch, sp), gdb_stdout);
printf_filtered ("\n");
need_nl = 0;
}
else if (!optimized && !unavailable && lval == lval_memory)
{
printf_filtered (" Previous frame's sp at ");
fputs_filtered (paddress (gdbarch, addr), gdb_stdout);
printf_filtered ("\n");
need_nl = 0;
}
else if (!optimized && !unavailable && lval == lval_register)
{
printf_filtered (" Previous frame's sp in %s\n",
gdbarch_register_name (gdbarch, realnum));
need_nl = 0;
}
/* else keep quiet. */
}
count = 0;
numregs = gdbarch_num_regs (gdbarch)
+ gdbarch_num_pseudo_regs (gdbarch);
for (i = 0; i < numregs; i++)
if (i != gdbarch_sp_regnum (gdbarch)
&& gdbarch_register_reggroup_p (gdbarch, i, all_reggroup))
{
/* Find out the location of the saved register without
fetching the corresponding value. */
frame_register_unwind (fi, i, &optimized, &unavailable,
&lval, &addr, &realnum, NULL);
/* For moment, only display registers that were saved on the
stack. */
if (!optimized && !unavailable && lval == lval_memory)
{
if (count == 0)
puts_filtered (" Saved registers:\n ");
else
puts_filtered (",");
wrap_here (" ");
printf_filtered (" %s at ",
gdbarch_register_name (gdbarch, i));
fputs_filtered (paddress (gdbarch, addr), gdb_stdout);
count++;
}
}
if (count || need_nl)
puts_filtered ("\n");
}
do_cleanups (back_to);
}
/* Print briefly all stack frames or just the innermost COUNT_EXP
frames. */
static void
backtrace_command_1 (char *count_exp, int show_locals, int no_filters,
int from_tty)
{
struct frame_info *fi;
int count;
int i;
struct frame_info *trailing;
int trailing_level, py_start = 0, py_end = 0;
enum py_bt_status result = PY_BT_ERROR;
if (!target_has_stack)
error (_("No stack."));
/* The following code must do two things. First, it must set the
variable TRAILING to the frame from which we should start
printing. Second, it must set the variable count to the number
of frames which we should print, or -1 if all of them. */
trailing = get_current_frame ();
trailing_level = 0;
if (count_exp)
{
count = parse_and_eval_long (count_exp);
if (count < 0)
{
struct frame_info *current;
py_start = count;
count = -count;
current = trailing;
while (current && count--)
{
QUIT;
current = get_prev_frame (current);
}
/* Will stop when CURRENT reaches the top of the stack.
TRAILING will be COUNT below it. */
while (current)
{
QUIT;
trailing = get_prev_frame (trailing);
current = get_prev_frame (current);
trailing_level++;
}
count = -1;
}
else
{
py_start = 0;
py_end = count;
}
}
else
{
py_end = -1;
count = -1;
}
if (info_verbose)
{
/* Read in symbols for all of the frames. Need to do this in a
separate pass so that "Reading in symbols for xxx" messages
don't screw up the appearance of the backtrace. Also if
people have strong opinions against reading symbols for
backtrace this may have to be an option. */
i = count;
for (fi = trailing; fi != NULL && i--; fi = get_prev_frame (fi))
{
CORE_ADDR pc;
QUIT;
pc = get_frame_address_in_block (fi);
find_pc_sect_symtab_via_partial (pc, find_pc_mapped_section (pc));
}
}
if (! no_filters)
{
int flags = PRINT_LEVEL | PRINT_FRAME_INFO | PRINT_ARGS;
enum py_frame_args arg_type;
if (show_locals)
flags |= PRINT_LOCALS;
if (!strcmp (print_frame_arguments, "scalars"))
arg_type = CLI_SCALAR_VALUES;
else if (!strcmp (print_frame_arguments, "all"))
arg_type = CLI_ALL_VALUES;
else
arg_type = NO_VALUES;
result = apply_frame_filter (get_current_frame (), flags, arg_type,
current_uiout, py_start, py_end);
}
/* Run the inbuilt backtrace if there are no filters registered, or
"no-filters" has been specified from the command. */
if (no_filters || result == PY_BT_NO_FILTERS)
{
for (i = 0, fi = trailing; fi && count--; i++, fi = get_prev_frame (fi))
{
QUIT;
/* Don't use print_stack_frame; if an error() occurs it probably
means further attempts to backtrace would fail (on the other
hand, perhaps the code does or could be fixed to make sure
the frame->prev field gets set to NULL in that case). */
print_frame_info (fi, 1, LOCATION, 1);
if (show_locals)
{
struct frame_id frame_id = get_frame_id (fi);
print_frame_local_vars (fi, 1, gdb_stdout);
/* print_frame_local_vars invalidates FI. */
fi = frame_find_by_id (frame_id);
if (fi == NULL)
{
trailing = NULL;
warning (_("Unable to restore previously selected frame."));
break;
}
}
/* Save the last frame to check for error conditions. */
trailing = fi;
}
/* If we've stopped before the end, mention that. */
if (fi && from_tty)
printf_filtered (_("(More stack frames follow...)\n"));
/* If we've run out of frames, and the reason appears to be an error
condition, print it. */
if (fi == NULL && trailing != NULL)
{
enum unwind_stop_reason reason;
reason = get_frame_unwind_stop_reason (trailing);
if (reason >= UNWIND_FIRST_ERROR)
printf_filtered (_("Backtrace stopped: %s\n"),
frame_stop_reason_string (reason));
}
}
}
static void
backtrace_command (char *arg, int from_tty)
{
struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
int fulltrace_arg = -1, arglen = 0, argc = 0, no_filters = -1;
int user_arg = 0;
if (arg)
{
char **argv;
int i;
argv = gdb_buildargv (arg);
make_cleanup_freeargv (argv);
argc = 0;
for (i = 0; argv[i]; i++)
{
unsigned int j;
for (j = 0; j < strlen (argv[i]); j++)
argv[i][j] = tolower (argv[i][j]);
if (no_filters < 0 && subset_compare (argv[i], "no-filters"))
no_filters = argc;
else
{
if (fulltrace_arg < 0 && subset_compare (argv[i], "full"))
fulltrace_arg = argc;
else
{
user_arg++;
arglen += strlen (argv[i]);
}
}
argc++;
}
arglen += user_arg;
if (fulltrace_arg >= 0 || no_filters >= 0)
{
if (arglen > 0)
{
arg = xmalloc (arglen + 1);
make_cleanup (xfree, arg);
arg[0] = 0;
for (i = 0; i < argc; i++)
{
if (i != fulltrace_arg && i != no_filters)
{
strcat (arg, argv[i]);
strcat (arg, " ");
}
}
}
else
arg = NULL;
}
}
backtrace_command_1 (arg, fulltrace_arg >= 0 /* show_locals */,
no_filters >= 0 /* no frame-filters */, from_tty);
do_cleanups (old_chain);
}
static void
backtrace_full_command (char *arg, int from_tty)
{
backtrace_command_1 (arg, 1 /* show_locals */, 0, from_tty);
}
/* Iterate over the local variables of a block B, calling CB with
CB_DATA. */
static void
iterate_over_block_locals (struct block *b,
iterate_over_block_arg_local_vars_cb cb,
void *cb_data)
{
struct block_iterator iter;
struct symbol *sym;
ALL_BLOCK_SYMBOLS (b, iter, sym)
{
switch (SYMBOL_CLASS (sym))
{
case LOC_LOCAL:
case LOC_REGISTER:
case LOC_STATIC:
case LOC_COMPUTED:
if (SYMBOL_IS_ARGUMENT (sym))
break;
if (SYMBOL_DOMAIN (sym) == COMMON_BLOCK_DOMAIN)
break;
(*cb) (SYMBOL_PRINT_NAME (sym), sym, cb_data);
break;
default:
/* Ignore symbols which are not locals. */
break;
}
}
}
/* Same, but print labels. */
#if 0
/* Commented out, as the code using this function has also been
commented out. FIXME:brobecker/2009-01-13: Find out why the code
was commented out in the first place. The discussion introducing
this change (2007-12-04: Support lexical blocks and function bodies
that occupy non-contiguous address ranges) did not explain why
this change was made. */
static int
print_block_frame_labels (struct gdbarch *gdbarch, struct block *b,
int *have_default, struct ui_file *stream)
{
struct block_iterator iter;
struct symbol *sym;
int values_printed = 0;
ALL_BLOCK_SYMBOLS (b, iter, sym)
{
if (strcmp (SYMBOL_LINKAGE_NAME (sym), "default") == 0)
{
if (*have_default)
continue;
*have_default = 1;
}
if (SYMBOL_CLASS (sym) == LOC_LABEL)
{
struct symtab_and_line sal;
struct value_print_options opts;
sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0);
values_printed = 1;
fputs_filtered (SYMBOL_PRINT_NAME (sym), stream);
get_user_print_options (&opts);
if (opts.addressprint)
{
fprintf_filtered (stream, " ");
fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (sym)),
stream);
}
fprintf_filtered (stream, " in file %s, line %d\n",
sal.symtab->filename, sal.line);
}
}
return values_printed;
}
#endif
/* Iterate over all the local variables in block B, including all its
superblocks, stopping when the top-level block is reached. */
void
iterate_over_block_local_vars (struct block *block,
iterate_over_block_arg_local_vars_cb cb,
void *cb_data)
{
while (block)
{
iterate_over_block_locals (block, cb, cb_data);
/* After handling the function's top-level block, stop. Don't
continue to its superblock, the block of per-file
symbols. */
if (BLOCK_FUNCTION (block))
break;
block = BLOCK_SUPERBLOCK (block);
}
}
/* Data to be passed around in the calls to the locals and args
iterators. */
struct print_variable_and_value_data
{
struct frame_id frame_id;
int num_tabs;
struct ui_file *stream;
int values_printed;
};
/* The callback for the locals and args iterators. */
static void
do_print_variable_and_value (const char *print_name,
struct symbol *sym,
void *cb_data)
{
struct print_variable_and_value_data *p = cb_data;
struct frame_info *frame;
frame = frame_find_by_id (p->frame_id);
if (frame == NULL)
{
warning (_("Unable to restore previously selected frame."));
return;
}
print_variable_and_value (print_name, sym, frame, p->stream, p->num_tabs);
/* print_variable_and_value invalidates FRAME. */
frame = NULL;
p->values_printed = 1;
}
/* Print all variables from the innermost up to the function block of FRAME.
Print them with values to STREAM indented by NUM_TABS.
This function will invalidate FRAME. */
static void
print_frame_local_vars (struct frame_info *frame, int num_tabs,
struct ui_file *stream)
{
struct print_variable_and_value_data cb_data;
struct block *block;
CORE_ADDR pc;
if (!get_frame_pc_if_available (frame, &pc))
{
fprintf_filtered (stream,
_("PC unavailable, cannot determine locals.\n"));
return;
}
block = get_frame_block (frame, 0);
if (block == 0)
{
fprintf_filtered (stream, "No symbol table info available.\n");
return;
}
cb_data.frame_id = get_frame_id (frame);
cb_data.num_tabs = 4 * num_tabs;
cb_data.stream = stream;
cb_data.values_printed = 0;
iterate_over_block_local_vars (block,
do_print_variable_and_value,
&cb_data);
/* do_print_variable_and_value invalidates FRAME. */
frame = NULL;
if (!cb_data.values_printed)
fprintf_filtered (stream, _("No locals.\n"));
}
void
locals_info (char *args, int from_tty)
{
print_frame_local_vars (get_selected_frame (_("No frame selected.")),
0, gdb_stdout);
}
/* Iterate over all the argument variables in block B.
Returns 1 if any argument was walked; 0 otherwise. */
void
iterate_over_block_arg_vars (struct block *b,
iterate_over_block_arg_local_vars_cb cb,
void *cb_data)
{
struct block_iterator iter;
struct symbol *sym, *sym2;
ALL_BLOCK_SYMBOLS (b, iter, sym)
{
/* Don't worry about things which aren't arguments. */
if (SYMBOL_IS_ARGUMENT (sym))
{
/* We have to look up the symbol because arguments can have
two entries (one a parameter, one a local) and the one we
want is the local, which lookup_symbol will find for us.
This includes gcc1 (not gcc2) on the sparc when passing a
small structure and gcc2 when the argument type is float
and it is passed as a double and converted to float by
the prologue (in the latter case the type of the LOC_ARG
symbol is double and the type of the LOC_LOCAL symbol is
float). There are also LOC_ARG/LOC_REGISTER pairs which
are not combined in symbol-reading. */
sym2 = lookup_symbol (SYMBOL_LINKAGE_NAME (sym),
b, VAR_DOMAIN, NULL);
(*cb) (SYMBOL_PRINT_NAME (sym), sym2, cb_data);
}
}
}
/* Print all argument variables of the function of FRAME.
Print them with values to STREAM.
This function will invalidate FRAME. */
static void
print_frame_arg_vars (struct frame_info *frame, struct ui_file *stream)
{
struct print_variable_and_value_data cb_data;
struct symbol *func;
CORE_ADDR pc;
if (!get_frame_pc_if_available (frame, &pc))
{
fprintf_filtered (stream, _("PC unavailable, cannot determine args.\n"));
return;
}
func = get_frame_function (frame);
if (func == NULL)
{
fprintf_filtered (stream, _("No symbol table info available.\n"));
return;
}
cb_data.frame_id = get_frame_id (frame);
cb_data.num_tabs = 0;
cb_data.stream = gdb_stdout;
cb_data.values_printed = 0;
iterate_over_block_arg_vars (SYMBOL_BLOCK_VALUE (func),
do_print_variable_and_value, &cb_data);
/* do_print_variable_and_value invalidates FRAME. */
frame = NULL;
if (!cb_data.values_printed)
fprintf_filtered (stream, _("No arguments.\n"));
}
void
args_info (char *ignore, int from_tty)
{
print_frame_arg_vars (get_selected_frame (_("No frame selected.")),
gdb_stdout);
}
static void
args_plus_locals_info (char *ignore, int from_tty)
{
args_info (ignore, from_tty);
locals_info (ignore, from_tty);
}
/* Select frame FRAME. Also print the stack frame and show the source
if this is the tui version. */
static void
select_and_print_frame (struct frame_info *frame)
{
select_frame (frame);
if (frame)
print_stack_frame (frame, 1, SRC_AND_LOC);
}
/* Return the symbol-block in which the selected frame is executing.
Can return zero under various legitimate circumstances.
If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
code address within the block returned. We use this to decide
which macros are in scope. */
struct block *
get_selected_block (CORE_ADDR *addr_in_block)
{
if (!has_stack_frames ())
return 0;
return get_frame_block (get_selected_frame (NULL), addr_in_block);
}
/* Find a frame a certain number of levels away from FRAME.
LEVEL_OFFSET_PTR points to an int containing the number of levels.
Positive means go to earlier frames (up); negative, the reverse.
The int that contains the number of levels is counted toward
zero as the frames for those levels are found.
If the top or bottom frame is reached, that frame is returned,
but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
how much farther the original request asked to go. */
struct frame_info *
find_relative_frame (struct frame_info *frame, int *level_offset_ptr)
{
/* Going up is simple: just call get_prev_frame enough times or
until the initial frame is reached. */
while (*level_offset_ptr > 0)
{
struct frame_info *prev = get_prev_frame (frame);
if (!prev)
break;
(*level_offset_ptr)--;
frame = prev;
}
/* Going down is just as simple. */
while (*level_offset_ptr < 0)
{
struct frame_info *next = get_next_frame (frame);
if (!next)
break;
(*level_offset_ptr)++;
frame = next;
}
return frame;
}
/* The "select_frame" command. With no argument this is a NOP.
Select the frame at level LEVEL_EXP if it is a valid level.
Otherwise, treat LEVEL_EXP as an address expression and select it.
See parse_frame_specification for more info on proper frame
expressions. */
void
select_frame_command (char *level_exp, int from_tty)
{
select_frame (parse_frame_specification_1 (level_exp, "No stack.", NULL));
}
/* The "frame" command. With no argument, print the selected frame
briefly. With an argument, behave like select_frame and then print
the selected frame. */
static void
frame_command (char *level_exp, int from_tty)
{
select_frame_command (level_exp, from_tty);
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
}
/* The XDB Compatibility command to print the current frame. */
static void
current_frame_command (char *level_exp, int from_tty)
{
print_stack_frame (get_selected_frame (_("No stack.")), 1, SRC_AND_LOC);
}
/* Select the frame up one or COUNT_EXP stack levels from the
previously selected frame, and print it briefly. */
static void
up_silently_base (char *count_exp)
{
struct frame_info *frame;
int count = 1;
if (count_exp)
count = parse_and_eval_long (count_exp);
frame = find_relative_frame (get_selected_frame ("No stack."), &count);
if (count != 0 && count_exp == NULL)
error (_("Initial frame selected; you cannot go up."));
select_frame (frame);
}
static void
up_silently_command (char *count_exp, int from_tty)
{
up_silently_base (count_exp);
}
static void
up_command (char *count_exp, int from_tty)
{
up_silently_base (count_exp);
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
}
/* Select the frame down one or COUNT_EXP stack levels from the previously
selected frame, and print it briefly. */
static void
down_silently_base (char *count_exp)
{
struct frame_info *frame;
int count = -1;
if (count_exp)
count = -parse_and_eval_long (count_exp);
frame = find_relative_frame (get_selected_frame ("No stack."), &count);
if (count != 0 && count_exp == NULL)
{
/* We only do this if COUNT_EXP is not specified. That way
"down" means to really go down (and let me know if that is
impossible), but "down 9999" can be used to mean go all the
way down without getting an error. */
error (_("Bottom (innermost) frame selected; you cannot go down."));
}
select_frame (frame);
}
static void
down_silently_command (char *count_exp, int from_tty)
{
down_silently_base (count_exp);
}
static void
down_command (char *count_exp, int from_tty)
{
down_silently_base (count_exp);
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
}
void
return_command (char *retval_exp, int from_tty)
{
/* Initialize it just to avoid a GCC false warning. */
enum return_value_convention rv_conv = RETURN_VALUE_STRUCT_CONVENTION;
struct frame_info *thisframe;
struct gdbarch *gdbarch;
struct symbol *thisfun;
struct value *return_value = NULL;
struct value *function = NULL;
const char *query_prefix = "";
thisframe = get_selected_frame ("No selected frame.");
thisfun = get_frame_function (thisframe);
gdbarch = get_frame_arch (thisframe);
if (get_frame_type (get_current_frame ()) == INLINE_FRAME)
error (_("Can not force return from an inlined function."));
/* Compute the return value. If the computation triggers an error,
let it bail. If the return type can't be handled, set
RETURN_VALUE to NULL, and QUERY_PREFIX to an informational
message. */
if (retval_exp)
{
struct expression *retval_expr = parse_expression (retval_exp);
struct cleanup *old_chain = make_cleanup (xfree, retval_expr);
struct type *return_type = NULL;
/* Compute the return value. Should the computation fail, this
call throws an error. */
return_value = evaluate_expression (retval_expr);
/* Cast return value to the return type of the function. Should
the cast fail, this call throws an error. */
if (thisfun != NULL)
return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun));
if (return_type == NULL)
{
if (retval_expr->elts[0].opcode != UNOP_CAST
&& retval_expr->elts[0].opcode != UNOP_CAST_TYPE)
error (_("Return value type not available for selected "
"stack frame.\n"
"Please use an explicit cast of the value to return."));
return_type = value_type (return_value);
}
do_cleanups (old_chain);
CHECK_TYPEDEF (return_type);
return_value = value_cast (return_type, return_value);
/* Make sure the value is fully evaluated. It may live in the
stack frame we're about to pop. */
if (value_lazy (return_value))
value_fetch_lazy (return_value);
if (thisfun != NULL)
function = read_var_value (thisfun, thisframe);
rv_conv = RETURN_VALUE_REGISTER_CONVENTION;
if (TYPE_CODE (return_type) == TYPE_CODE_VOID)
/* If the return-type is "void", don't try to find the
return-value's location. However, do still evaluate the
return expression so that, even when the expression result
is discarded, side effects such as "return i++" still
occur. */
return_value = NULL;
else if (thisfun != NULL)
{
rv_conv = struct_return_convention (gdbarch, function, return_type);
if (rv_conv == RETURN_VALUE_STRUCT_CONVENTION
|| rv_conv == RETURN_VALUE_ABI_RETURNS_ADDRESS)
{
query_prefix = "The location at which to store the "
"function's return value is unknown.\n"
"If you continue, the return value "
"that you specified will be ignored.\n";
return_value = NULL;
}
}
}
/* Does an interactive user really want to do this? Include
information, such as how well GDB can handle the return value, in
the query message. */
if (from_tty)
{
int confirmed;
if (thisfun == NULL)
confirmed = query (_("%sMake selected stack frame return now? "),
query_prefix);
else
confirmed = query (_("%sMake %s return now? "), query_prefix,
SYMBOL_PRINT_NAME (thisfun));
if (!confirmed)
error (_("Not confirmed"));
}
/* Discard the selected frame and all frames inner-to it. */
frame_pop (get_selected_frame (NULL));
/* Store RETURN_VALUE in the just-returned register set. */
if (return_value != NULL)
{
struct type *return_type = value_type (return_value);
struct gdbarch *gdbarch = get_regcache_arch (get_current_regcache ());
gdb_assert (rv_conv != RETURN_VALUE_STRUCT_CONVENTION
&& rv_conv != RETURN_VALUE_ABI_RETURNS_ADDRESS);
gdbarch_return_value (gdbarch, function, return_type,
get_current_regcache (), NULL /*read*/,
value_contents (return_value) /*write*/);
}
/* If we are at the end of a call dummy now, pop the dummy frame
too. */
if (get_frame_type (get_current_frame ()) == DUMMY_FRAME)
frame_pop (get_current_frame ());
/* If interactive, print the frame that is now current. */
if (from_tty)
frame_command ("0", 1);
else
select_frame_command ("0", 0);
}
/* Sets the scope to input function name, provided that the function
is within the current stack frame. */
struct function_bounds
{
CORE_ADDR low, high;
};
static void
func_command (char *arg, int from_tty)
{
struct frame_info *frame;
int found = 0;
struct symtabs_and_lines sals;
int i;
int level = 1;
struct function_bounds *func_bounds = NULL;
struct cleanup *cleanups;
if (arg != NULL)
return;
frame = parse_frame_specification ("0");
sals = decode_line_with_current_source (arg, DECODE_LINE_FUNFIRSTLINE);
cleanups = make_cleanup (xfree, sals.sals);
func_bounds = (struct function_bounds *) xmalloc (
sizeof (struct function_bounds) * sals.nelts);
make_cleanup (xfree, func_bounds);
for (i = 0; (i < sals.nelts && !found); i++)
{
if (sals.sals[i].pspace != current_program_space)
func_bounds[i].low = func_bounds[i].high = 0;
else if (sals.sals[i].pc == 0
|| find_pc_partial_function (sals.sals[i].pc, NULL,
&func_bounds[i].low,
&func_bounds[i].high) == 0)
{
func_bounds[i].low = func_bounds[i].high = 0;
}
}
do
{
for (i = 0; (i < sals.nelts && !found); i++)
found = (get_frame_pc (frame) >= func_bounds[i].low
&& get_frame_pc (frame) < func_bounds[i].high);
if (!found)
{
level = 1;
frame = find_relative_frame (frame, &level);
}
}
while (!found && level == 0);
do_cleanups (cleanups);
if (!found)
printf_filtered (_("'%s' not within current stack frame.\n"), arg);
else if (frame != get_selected_frame (NULL))
select_and_print_frame (frame);
}
/* Gets the language of the current frame. */
enum language
get_frame_language (void)
{
struct frame_info *frame = deprecated_safe_get_selected_frame ();
if (frame)
{
volatile struct gdb_exception ex;
CORE_ADDR pc = 0;
struct symtab *s;
/* We determine the current frame language by looking up its
associated symtab. To retrieve this symtab, we use the frame
PC. However we cannot use the frame PC as is, because it
usually points to the instruction following the "call", which
is sometimes the first instruction of another function. So
we rely on get_frame_address_in_block(), it provides us with
a PC that is guaranteed to be inside the frame's code
block. */
TRY_CATCH (ex, RETURN_MASK_ERROR)
{
pc = get_frame_address_in_block (frame);
}
if (ex.reason < 0)
{
if (ex.error != NOT_AVAILABLE_ERROR)
throw_exception (ex);
}
else
{
s = find_pc_symtab (pc);
if (s != NULL)
return s->language;
}
}
return language_unknown;
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_stack (void);
void
_initialize_stack (void)
{
add_com ("return", class_stack, return_command, _("\
Make selected stack frame return to its caller.\n\
Control remains in the debugger, but when you continue\n\
execution will resume in the frame above the one now selected.\n\
If an argument is given, it is an expression for the value to return."));
add_com ("up", class_stack, up_command, _("\
Select and print stack frame that called this one.\n\
An argument says how many frames up to go."));
add_com ("up-silently", class_support, up_silently_command, _("\
Same as the `up' command, but does not print anything.\n\
This is useful in command scripts."));
add_com ("down", class_stack, down_command, _("\
Select and print stack frame called by this one.\n\
An argument says how many frames down to go."));
add_com_alias ("do", "down", class_stack, 1);
add_com_alias ("dow", "down", class_stack, 1);
add_com ("down-silently", class_support, down_silently_command, _("\
Same as the `down' command, but does not print anything.\n\
This is useful in command scripts."));
add_com ("frame", class_stack, frame_command, _("\
Select and print a stack frame.\nWith no argument, \
print the selected stack frame. (See also \"info frame\").\n\
An argument specifies the frame to select.\n\
It can be a stack frame number or the address of the frame.\n\
With argument, nothing is printed if input is coming from\n\
a command file or a user-defined command."));
add_com_alias ("f", "frame", class_stack, 1);
if (xdb_commands)
{
add_com ("L", class_stack, current_frame_command,
_("Print the current stack frame.\n"));
add_com_alias ("V", "frame", class_stack, 1);
}
add_com ("select-frame", class_stack, select_frame_command, _("\
Select a stack frame without printing anything.\n\
An argument specifies the frame to select.\n\
It can be a stack frame number or the address of the frame.\n"));
add_com ("backtrace", class_stack, backtrace_command, _("\
Print backtrace of all stack frames, or innermost COUNT frames.\n\
With a negative argument, print outermost -COUNT frames.\nUse of the \
'full' qualifier also prints the values of the local variables.\n\
Use of the 'no-filters' qualifier prohibits frame filters from executing\n\
on this backtrace.\n"));
add_com_alias ("bt", "backtrace", class_stack, 0);
if (xdb_commands)
{
add_com_alias ("t", "backtrace", class_stack, 0);
add_com ("T", class_stack, backtrace_full_command, _("\
Print backtrace of all stack frames, or innermost COUNT frames\n\
and the values of the local variables.\n\
With a negative argument, print outermost -COUNT frames.\n\
Usage: T <count>\n"));
}
add_com_alias ("where", "backtrace", class_alias, 0);
add_info ("stack", backtrace_command,
_("Backtrace of the stack, or innermost COUNT frames."));
add_info_alias ("s", "stack", 1);
add_info ("frame", frame_info,
_("All about selected stack frame, or frame at ADDR."));
add_info_alias ("f", "frame", 1);
add_info ("locals", locals_info,
_("Local variables of current stack frame."));
add_info ("args", args_info,
_("Argument variables of current stack frame."));
if (xdb_commands)
add_com ("l", class_info, args_plus_locals_info,
_("Argument and local variables of current stack frame."));
if (dbx_commands)
add_com ("func", class_stack, func_command, _("\
Select the stack frame that contains <func>.\n\
Usage: func <name>\n"));
add_setshow_enum_cmd ("frame-arguments", class_stack,
print_frame_arguments_choices, &print_frame_arguments,
_("Set printing of non-scalar frame arguments"),
_("Show printing of non-scalar frame arguments"),
NULL, NULL, NULL, &setprintlist, &showprintlist);
add_setshow_auto_boolean_cmd ("disassemble-next-line", class_stack,
&disassemble_next_line, _("\
Set whether to disassemble next source line or insn when execution stops."),
_("\
Show whether to disassemble next source line or insn when execution stops."),
_("\
If ON, GDB will display disassembly of the next source line, in addition\n\
to displaying the source line itself. If the next source line cannot\n\
be displayed (e.g., source is unavailable or there's no line info), GDB\n\
will display disassembly of next instruction instead of showing the\n\
source line.\n\
If AUTO, display disassembly of next instruction only if the source line\n\
cannot be displayed.\n\
If OFF (which is the default), never display the disassembly of the next\n\
source line."),
NULL,
show_disassemble_next_line,
&setlist, &showlist);
disassemble_next_line = AUTO_BOOLEAN_FALSE;
add_setshow_enum_cmd ("entry-values", class_stack,
print_entry_values_choices, &print_entry_values,
_("Set printing of function arguments at function "
"entry"),
_("Show printing of function arguments at function "
"entry"),
_("\
GDB can sometimes determine the values of function arguments at entry,\n\
in addition to their current values. This option tells GDB whether\n\
to print the current value, the value at entry (marked as val@entry),\n\
or both. Note that one or both of these values may be <optimized out>."),
NULL, NULL, &setprintlist, &showprintlist);
}
|