aboutsummaryrefslogtreecommitdiff
path: root/gdb/main.c
blob: 8d2666ecc952d39c4590519ef8b29dfce1caf60c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
/* Top level stuff for GDB, the GNU debugger.

   Copyright (C) 1986-2022 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 "top.h"
#include "target.h"
#include "inferior.h"
#include "symfile.h"
#include "gdbcore.h"
#include "getopt.h"

#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include "gdbsupport/event-loop.h"
#include "ui-out.h"

#include "interps.h"
#include "main.h"
#include "source.h"
#include "cli/cli-cmds.h"
#include "objfiles.h"
#include "auto-load.h"
#include "maint.h"

#include "filenames.h"
#include "gdbsupport/filestuff.h"
#include <signal.h>
#include "event-top.h"
#include "infrun.h"
#include "gdbsupport/signals-state-save-restore.h"
#include <algorithm>
#include <vector>
#include "gdbsupport/pathstuff.h"
#include "cli/cli-style.h"
#ifdef GDBTK
#include "gdbtk/generic/gdbtk.h"
#endif
#include "gdbsupport/alt-stack.h"
#include "observable.h"
#include "serial.h"

/* The selected interpreter.  */
std::string interpreter_p;

/* System root path, used to find libraries etc.  */
std::string gdb_sysroot;

/* GDB datadir, used to store data files.  */
std::string gdb_datadir;

/* Non-zero if GDB_DATADIR was provided on the command line.
   This doesn't track whether data-directory is set later from the
   command line, but we don't reread system.gdbinit when that happens.  */
static int gdb_datadir_provided = 0;

/* If gdb was configured with --with-python=/path,
   the possibly relocated path to python's lib directory.  */
std::string python_libdir;

/* Target IO streams.  */
struct ui_file *gdb_stdtargin;
struct ui_file *gdb_stdtarg;
struct ui_file *gdb_stdtargerr;

/* True if --batch or --batch-silent was seen.  */
int batch_flag = 0;

/* Support for the --batch-silent option.  */
int batch_silent = 0;

/* Support for --return-child-result option.
   Set the default to -1 to return error in the case
   that the program does not run or does not complete.  */
int return_child_result = 0;
int return_child_result_value = -1;


/* GDB as it has been invoked from the command line (i.e. argv[0]).  */
static char *gdb_program_name;

/* Return read only pointer to GDB_PROGRAM_NAME.  */
const char *
get_gdb_program_name (void)
{
  return gdb_program_name;
}

static void print_gdb_help (struct ui_file *);

/* Set the data-directory parameter to NEW_DATADIR.
   If NEW_DATADIR is not a directory then a warning is printed.
   We don't signal an error for backward compatibility.  */

void
set_gdb_data_directory (const char *new_datadir)
{
  struct stat st;

  if (stat (new_datadir, &st) < 0)
    {
      int save_errno = errno;

      gdb_printf (gdb_stderr, "Warning: ");
      print_sys_errmsg (new_datadir, save_errno);
    }
  else if (!S_ISDIR (st.st_mode))
    warning (_("%ps is not a directory."),
	     styled_string (file_name_style.style (), new_datadir));

  gdb_datadir = gdb_realpath (new_datadir).get ();

  /* gdb_realpath won't return an absolute path if the path doesn't exist,
     but we still want to record an absolute path here.  If the user entered
     "../foo" and "../foo" doesn't exist then we'll record $(pwd)/../foo which
     isn't canonical, but that's ok.  */
  if (!IS_ABSOLUTE_PATH (gdb_datadir.c_str ()))
    gdb_datadir = gdb_abspath (gdb_datadir.c_str ());
}

/* Relocate a file or directory.  PROGNAME is the name by which gdb
   was invoked (i.e., argv[0]).  INITIAL is the default value for the
   file or directory.  RELOCATABLE is true if the value is relocatable,
   false otherwise.  This may return an empty string under the same
   conditions as make_relative_prefix returning NULL.  */

static std::string
relocate_path (const char *progname, const char *initial, bool relocatable)
{
  if (relocatable)
    {
      gdb::unique_xmalloc_ptr<char> str (make_relative_prefix (progname,
							       BINDIR,
							       initial));
      if (str != nullptr)
	return str.get ();
      return std::string ();
    }
  return initial;
}

/* Like relocate_path, but specifically checks for a directory.
   INITIAL is relocated according to the rules of relocate_path.  If
   the result is a directory, it is used; otherwise, INITIAL is used.
   The chosen directory is then canonicalized using lrealpath.  */

std::string
relocate_gdb_directory (const char *initial, bool relocatable)
{
  std::string dir = relocate_path (gdb_program_name, initial, relocatable);
  if (!dir.empty ())
    {
      struct stat s;

      if (stat (dir.c_str (), &s) != 0 || !S_ISDIR (s.st_mode))
	{
	  dir.clear ();
	}
    }
  if (dir.empty ())
    dir = initial;

  /* Canonicalize the directory.  */
  if (!dir.empty ())
    {
      gdb::unique_xmalloc_ptr<char> canon_sysroot (lrealpath (dir.c_str ()));

      if (canon_sysroot)
	dir = canon_sysroot.get ();
    }

  return dir;
}

/* Given a gdbinit path in FILE, adjusts it according to the gdb_datadir
   parameter if it is in the data dir, or passes it through relocate_path
   otherwise.  */

static std::string
relocate_file_path_maybe_in_datadir (const std::string &file,
				     bool relocatable)
{
  size_t datadir_len = strlen (GDB_DATADIR);

  std::string relocated_path;

  /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
     has been provided, search for SYSTEM_GDBINIT there.  */
  if (gdb_datadir_provided
      && datadir_len < file.length ()
      && filename_ncmp (file.c_str (), GDB_DATADIR, datadir_len) == 0
      && IS_DIR_SEPARATOR (file[datadir_len]))
    {
      /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
	 to gdb_datadir.  */

      size_t start = datadir_len;
      for (; IS_DIR_SEPARATOR (file[start]); ++start)
	;
      relocated_path = gdb_datadir + SLASH_STRING + file.substr (start);
    }
  else
    {
      relocated_path = relocate_path (gdb_program_name, file.c_str (),
				      relocatable);
    }
    return relocated_path;
}

/* A class to wrap up the logic for finding the three different types of
   initialisation files GDB uses, system wide, home directory, and current
   working directory.  */

class gdb_initfile_finder
{
public:
  /* Constructor.  Finds initialisation files named FILENAME in the home
     directory or local (current working) directory.  System initialisation
     files are found in both SYSTEM_FILENAME and SYSTEM_DIRNAME if these
     are not nullptr (either or both can be).  The matching *_RELOCATABLE
     flag is passed through to RELOCATE_FILE_PATH_MAYBE_IN_DATADIR.

     If FILENAME starts with a '.' then when looking in the home directory
     this first '.' can be ignored in some cases.  */
  explicit gdb_initfile_finder (const char *filename,
				const char *system_filename,
				bool system_filename_relocatable,
				const char *system_dirname,
				bool system_dirname_relocatable,
				bool lookup_local_file)
  {
    struct stat s;

    if (system_filename != nullptr && system_filename[0] != '\0')
      {
	std::string relocated_filename
	  = relocate_file_path_maybe_in_datadir (system_filename,
						 system_filename_relocatable);
	if (!relocated_filename.empty ()
	    && stat (relocated_filename.c_str (), &s) == 0)
	  m_system_files.push_back (relocated_filename);
      }

    if (system_dirname != nullptr && system_dirname[0] != '\0')
      {
	std::string relocated_dirname
	  = relocate_file_path_maybe_in_datadir (system_dirname,
						 system_dirname_relocatable);
	if (!relocated_dirname.empty ())
	  {
	    gdb_dir_up dir (opendir (relocated_dirname.c_str ()));
	    if (dir != nullptr)
	      {
		std::vector<std::string> files;
		while (true)
		  {
		    struct dirent *ent = readdir (dir.get ());
		    if (ent == nullptr)
		      break;
		    std::string name (ent->d_name);
		    if (name == "." || name == "..")
		      continue;
		    /* ent->d_type is not available on all systems
		       (e.g. mingw, Solaris), so we have to call stat().  */
		    std::string tmp_filename
		      = relocated_dirname + SLASH_STRING + name;
		    if (stat (tmp_filename.c_str (), &s) != 0
			|| !S_ISREG (s.st_mode))
		      continue;
		    const struct extension_language_defn *extlang
		      = get_ext_lang_of_file (tmp_filename.c_str ());
		    /* We effectively don't support "set script-extension
		       off/soft", because we are loading system init files
		       here, so it does not really make sense to depend on
		       a setting.  */
		    if (extlang != nullptr && ext_lang_present_p (extlang))
		      files.push_back (std::move (tmp_filename));
		  }
		std::sort (files.begin (), files.end ());
		m_system_files.insert (m_system_files.end (),
				       files.begin (), files.end ());
	      }
	  }
      }

      /* If the .gdbinit file in the current directory is the same as
	 the $HOME/.gdbinit file, it should not be sourced.  homebuf
	 and cwdbuf are used in that purpose.  Make sure that the stats
	 are zero in case one of them fails (this guarantees that they
	 won't match if either exists).  */

    struct stat homebuf, cwdbuf;
    memset (&homebuf, 0, sizeof (struct stat));
    memset (&cwdbuf, 0, sizeof (struct stat));

    m_home_file = find_gdb_home_config_file (filename, &homebuf);

    if (lookup_local_file && stat (filename, &cwdbuf) == 0)
      {
	if (m_home_file.empty ()
	    || memcmp ((char *) &homebuf, (char *) &cwdbuf,
		       sizeof (struct stat)))
	  m_local_file = filename;
      }
  }

  DISABLE_COPY_AND_ASSIGN (gdb_initfile_finder);

  /* Return a list of system initialisation files.  The list could be
     empty.  */
  const std::vector<std::string> &system_files () const
  { return m_system_files; }

  /* Return the path to the home initialisation file.  The string can be
     empty if there is no such file.  */
  const std::string &home_file () const
  { return m_home_file; }

  /* Return the path to the local initialisation file.  The string can be
     empty if there is no such file.  */
  const std::string &local_file () const
  { return m_local_file; }

private:

  /* Vector of all system init files in the order they should be processed.
     Could be empty.  */
  std::vector<std::string> m_system_files;

  /* Initialization file from the home directory.  Could be the empty
     string if there is no such file found.  */
  std::string m_home_file;

  /* Initialization file from the current working directory.  Could be the
     empty string if there is no such file found.  */
  std::string m_local_file;
};

/* Compute the locations of init files that GDB should source and return
   them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT.  The SYSTEM_GDBINIT
   can be returned as an empty vector, and HOME_GDBINIT and LOCAL_GDBINIT
   can be returned as empty strings if there is no init file of that
   type.  */

static void
get_init_files (std::vector<std::string> *system_gdbinit,
		std::string *home_gdbinit,
		std::string *local_gdbinit)
{
  /* Cache the file lookup object so we only actually search for the files
     once.  */
  static gdb::optional<gdb_initfile_finder> init_files;
  if (!init_files.has_value ())
    init_files.emplace (GDBINIT, SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE,
			SYSTEM_GDBINIT_DIR, SYSTEM_GDBINIT_DIR_RELOCATABLE,
			true);

  *system_gdbinit = init_files->system_files ();
  *home_gdbinit = init_files->home_file ();
  *local_gdbinit = init_files->local_file ();
}

/* Compute the location of the early init file GDB should source and return
   it in HOME_GDBEARLYINIT.  HOME_GDBEARLYINIT could be returned as an
   empty string if there is no early init file found.  */

static void
get_earlyinit_files (std::string *home_gdbearlyinit)
{
  /* Cache the file lookup object so we only actually search for the files
     once.  */
  static gdb::optional<gdb_initfile_finder> init_files;
  if (!init_files.has_value ())
    init_files.emplace (GDBEARLYINIT, nullptr, false, nullptr, false, false);

  *home_gdbearlyinit = init_files->home_file ();
}

/* Start up the event loop.  This is the entry point to the event loop
   from the command loop.  */

static void
start_event_loop ()
{
  /* Loop until there is nothing to do.  This is the entry point to
     the event loop engine.  gdb_do_one_event will process one event
     for each invocation.  It blocks waiting for an event and then
     processes it.  */
  while (1)
    {
      int result = 0;

      try
	{
	  result = gdb_do_one_event ();
	}
      catch (const gdb_exception &ex)
	{
	  exception_print (gdb_stderr, ex);

	  /* If any exception escaped to here, we better enable
	     stdin.  Otherwise, any command that calls async_disable_stdin,
	     and then throws, will leave stdin inoperable.  */
	  SWITCH_THRU_ALL_UIS ()
	    {
	      async_enable_stdin ();
	    }
	  /* If we long-jumped out of do_one_event, we probably didn't
	     get around to resetting the prompt, which leaves readline
	     in a messed-up state.  Reset it here.  */
	  current_ui->prompt_state = PROMPT_NEEDED;
	  gdb::observers::command_error.notify ();
	  /* This call looks bizarre, but it is required.  If the user
	     entered a command that caused an error,
	     after_char_processing_hook won't be called from
	     rl_callback_read_char_wrapper.  Using a cleanup there
	     won't work, since we want this function to be called
	     after a new prompt is printed.  */
	  if (after_char_processing_hook)
	    (*after_char_processing_hook) ();
	  /* Maybe better to set a flag to be checked somewhere as to
	     whether display the prompt or not.  */
	}

      if (result < 0)
	break;
    }

  /* We are done with the event loop.  There are no more event sources
     to listen to.  So we exit GDB.  */
  return;
}

/* Call command_loop.  */

/* Prevent inlining this function for the benefit of GDB's selftests
   in the testsuite.  Those tests want to run GDB under GDB and stop
   here.  */
static void captured_command_loop () __attribute__((noinline));

static void
captured_command_loop ()
{
  struct ui *ui = current_ui;

  /* Top-level execution commands can be run in the background from
     here on.  */
  current_ui->async = 1;

  /* Give the interpreter a chance to print a prompt, if necessary  */
  if (ui->prompt_state != PROMPT_BLOCKED)
    interp_pre_command_loop (top_level_interpreter ());

  /* Now it's time to start the event loop.  */
  start_event_loop ();

  /* If the command_loop returned, normally (rather than threw an
     error) we try to quit.  If the quit is aborted, our caller
     catches the signal and restarts the command loop.  */
  quit_command (NULL, ui->instream == ui->stdin_stream);
}

/* Handle command errors thrown from within catch_command_errors.  */

static int
handle_command_errors (const struct gdb_exception &e)
{
  if (e.reason < 0)
    {
      exception_print (gdb_stderr, e);

      /* If any exception escaped to here, we better enable stdin.
	 Otherwise, any command that calls async_disable_stdin, and
	 then throws, will leave stdin inoperable.  */
      async_enable_stdin ();
      return 0;
    }
  return 1;
}

/* Type of the command callback passed to the const
   catch_command_errors.  */

typedef void (catch_command_errors_const_ftype) (const char *, int);

/* Wrap calls to commands run before the event loop is started.  */

static int
catch_command_errors (catch_command_errors_const_ftype command,
		      const char *arg, int from_tty,
		      bool do_bp_actions = false)
{
  try
    {
      int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;

      command (arg, from_tty);

      maybe_wait_sync_command_done (was_sync);

      /* Do any commands attached to breakpoint we stopped at.  */
      if (do_bp_actions)
	bpstat_do_actions ();
    }
  catch (const gdb_exception &e)
    {
      return handle_command_errors (e);
    }

  return 1;
}

/* Adapter for symbol_file_add_main that translates 'from_tty' to a
   symfile_add_flags.  */

static void
symbol_file_add_main_adapter (const char *arg, int from_tty)
{
  symfile_add_flags add_flags = 0;

  if (from_tty)
    add_flags |= SYMFILE_VERBOSE;

  symbol_file_add_main (arg, add_flags);
}

/* Perform validation of the '--readnow' and '--readnever' flags.  */

static void
validate_readnow_readnever ()
{
  if (readnever_symbol_files && readnow_symbol_files)
    {
      error (_("%s: '--readnow' and '--readnever' cannot be "
	       "specified simultaneously"),
	     gdb_program_name);
    }
}

/* Type of this option.  */
enum cmdarg_kind
{
  /* Option type -x.  */
  CMDARG_FILE,

  /* Option type -ex.  */
  CMDARG_COMMAND,

  /* Option type -ix.  */
  CMDARG_INIT_FILE,

  /* Option type -iex.  */
  CMDARG_INIT_COMMAND,

  /* Option type -eix.  */
  CMDARG_EARLYINIT_FILE,

  /* Option type -eiex.  */
  CMDARG_EARLYINIT_COMMAND
};

/* Arguments of --command option and its counterpart.  */
struct cmdarg
{
  cmdarg (cmdarg_kind type_, char *string_)
    : type (type_), string (string_)
  {}

  /* Type of this option.  */
  enum cmdarg_kind type;

  /* Value of this option - filename or the GDB command itself.  String memory
     is not owned by this structure despite it is 'const'.  */
  char *string;
};

/* From CMDARG_VEC execute command files (matching FILE_TYPE) or commands
   (matching CMD_TYPE).  Update the value in *RET if and scripts or
   commands are executed.  */

static void
execute_cmdargs (const std::vector<struct cmdarg> *cmdarg_vec,
		 cmdarg_kind file_type, cmdarg_kind cmd_type,
		 int *ret)
{
  for (const auto &cmdarg_p : *cmdarg_vec)
    {
      if (cmdarg_p.type == file_type)
	*ret = catch_command_errors (source_script, cmdarg_p.string,
				     !batch_flag);
      else if (cmdarg_p.type == cmd_type)
	*ret = catch_command_errors (execute_command, cmdarg_p.string,
				     !batch_flag, true);
    }
}

static void
captured_main_1 (struct captured_main_args *context)
{
  int argc = context->argc;
  char **argv = context->argv;

  static int quiet = 0;
  static int set_args = 0;
  static int inhibit_home_gdbinit = 0;

  /* Pointers to various arguments from command line.  */
  char *symarg = NULL;
  char *execarg = NULL;
  char *pidarg = NULL;
  char *corearg = NULL;
  char *pid_or_core_arg = NULL;
  char *cdarg = NULL;
  char *ttyarg = NULL;

  /* These are static so that we can take their address in an
     initializer.  */
  static int print_help;
  static int print_version;
  static int print_configuration;

  /* Pointers to all arguments of --command option.  */
  std::vector<struct cmdarg> cmdarg_vec;

  /* All arguments of --directory option.  */
  std::vector<char *> dirarg;

  int i;
  int save_auto_load;
  int ret = 1;

#ifdef HAVE_USEFUL_SBRK
  /* Set this before constructing scoped_command_stats.  */
  lim_at_start = (char *) sbrk (0);
#endif

  scoped_command_stats stat_reporter (false);

#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
  setlocale (LC_MESSAGES, "");
#endif
#if defined (HAVE_SETLOCALE)
  setlocale (LC_CTYPE, "");
#endif
#ifdef ENABLE_NLS
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);
#endif

  notice_open_fds ();

#ifdef __MINGW32__
  /* Ensure stderr is unbuffered.  A Cygwin pty or pipe is implemented
     as a Windows pipe, and Windows buffers on pipes.  */
  setvbuf (stderr, NULL, _IONBF, BUFSIZ);
#endif

  /* Note: `error' cannot be called before this point, because the
     caller will crash when trying to print the exception.  */
  main_ui = new ui (stdin, stdout, stderr);
  current_ui = main_ui;

  gdb_stdtarg = gdb_stderr;
  gdb_stdtargerr = gdb_stderr;
  gdb_stdtargin = gdb_stdin;

  if (bfd_init () != BFD_INIT_MAGIC)
    error (_("fatal error: libbfd ABI mismatch"));

#ifdef __MINGW32__
  /* On Windows, argv[0] is not necessarily set to absolute form when
     GDB is found along PATH, without which relocation doesn't work.  */
  gdb_program_name = windows_get_absolute_argv0 (argv[0]);
#else
  gdb_program_name = xstrdup (argv[0]);
#endif

  /* Prefix warning messages with the command name.  */
  gdb::unique_xmalloc_ptr<char> tmp_warn_preprint
    = xstrprintf ("%s: warning: ", gdb_program_name);
  warning_pre_print = tmp_warn_preprint.get ();

  current_directory = getcwd (NULL, 0);
  if (current_directory == NULL)
    perror_warning_with_name (_("error finding working directory"));

  /* Set the sysroot path.  */
  gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
					TARGET_SYSTEM_ROOT_RELOCATABLE);

  if (gdb_sysroot.empty ())
    gdb_sysroot = TARGET_SYSROOT_PREFIX;

  debug_file_directory
    = relocate_gdb_directory (DEBUGDIR, DEBUGDIR_RELOCATABLE);

  gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
					GDB_DATADIR_RELOCATABLE);

#ifdef WITH_PYTHON_LIBDIR
  python_libdir = relocate_gdb_directory (WITH_PYTHON_LIBDIR,
					  PYTHON_LIBDIR_RELOCATABLE);
#endif

#ifdef RELOC_SRCDIR
  add_substitute_path_rule (RELOC_SRCDIR,
			    make_relative_prefix (gdb_program_name, BINDIR,
						  RELOC_SRCDIR));
#endif

  /* There will always be an interpreter.  Either the one passed into
     this captured main, or one specified by the user at start up, or
     the console.  Initialize the interpreter to the one requested by 
     the application.  */
  interpreter_p = context->interpreter_p;

  /* Parse arguments and options.  */
  {
    int c;
    /* When var field is 0, use flag field to record the equivalent
       short option (or arbitrary numbers starting at 10 for those
       with no equivalent).  */
    enum {
      OPT_SE = 10,
      OPT_CD,
      OPT_ANNOTATE,
      OPT_STATISTICS,
      OPT_TUI,
      OPT_NOWINDOWS,
      OPT_WINDOWS,
      OPT_IX,
      OPT_IEX,
      OPT_EIX,
      OPT_EIEX,
      OPT_READNOW,
      OPT_READNEVER
    };
    /* This struct requires int* in the struct, but write_files is a bool.
       So use this temporary int that we write back after argument parsing.  */
    int write_files_1 = 0;
    static struct option long_options[] =
    {
      {"tui", no_argument, 0, OPT_TUI},
      {"readnow", no_argument, NULL, OPT_READNOW},
      {"readnever", no_argument, NULL, OPT_READNEVER},
      {"r", no_argument, NULL, OPT_READNOW},
      {"quiet", no_argument, &quiet, 1},
      {"q", no_argument, &quiet, 1},
      {"silent", no_argument, &quiet, 1},
      {"nh", no_argument, &inhibit_home_gdbinit, 1},
      {"nx", no_argument, &inhibit_gdbinit, 1},
      {"n", no_argument, &inhibit_gdbinit, 1},
      {"batch-silent", no_argument, 0, 'B'},
      {"batch", no_argument, &batch_flag, 1},

    /* This is a synonym for "--annotate=1".  --annotate is now
       preferred, but keep this here for a long time because people
       will be running emacses which use --fullname.  */
      {"fullname", no_argument, 0, 'f'},
      {"f", no_argument, 0, 'f'},

      {"annotate", required_argument, 0, OPT_ANNOTATE},
      {"help", no_argument, &print_help, 1},
      {"se", required_argument, 0, OPT_SE},
      {"symbols", required_argument, 0, 's'},
      {"s", required_argument, 0, 's'},
      {"exec", required_argument, 0, 'e'},
      {"e", required_argument, 0, 'e'},
      {"core", required_argument, 0, 'c'},
      {"c", required_argument, 0, 'c'},
      {"pid", required_argument, 0, 'p'},
      {"p", required_argument, 0, 'p'},
      {"command", required_argument, 0, 'x'},
      {"eval-command", required_argument, 0, 'X'},
      {"version", no_argument, &print_version, 1},
      {"configuration", no_argument, &print_configuration, 1},
      {"x", required_argument, 0, 'x'},
      {"ex", required_argument, 0, 'X'},
      {"init-command", required_argument, 0, OPT_IX},
      {"init-eval-command", required_argument, 0, OPT_IEX},
      {"ix", required_argument, 0, OPT_IX},
      {"iex", required_argument, 0, OPT_IEX},
      {"early-init-command", required_argument, 0, OPT_EIX},
      {"early-init-eval-command", required_argument, 0, OPT_EIEX},
      {"eix", required_argument, 0, OPT_EIX},
      {"eiex", required_argument, 0, OPT_EIEX},
#ifdef GDBTK
      {"tclcommand", required_argument, 0, 'z'},
      {"enable-external-editor", no_argument, 0, 'y'},
      {"editor-command", required_argument, 0, 'w'},
#endif
      {"ui", required_argument, 0, 'i'},
      {"interpreter", required_argument, 0, 'i'},
      {"i", required_argument, 0, 'i'},
      {"directory", required_argument, 0, 'd'},
      {"d", required_argument, 0, 'd'},
      {"data-directory", required_argument, 0, 'D'},
      {"D", required_argument, 0, 'D'},
      {"cd", required_argument, 0, OPT_CD},
      {"tty", required_argument, 0, 't'},
      {"baud", required_argument, 0, 'b'},
      {"b", required_argument, 0, 'b'},
      {"nw", no_argument, NULL, OPT_NOWINDOWS},
      {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
      {"w", no_argument, NULL, OPT_WINDOWS},
      {"windows", no_argument, NULL, OPT_WINDOWS},
      {"statistics", no_argument, 0, OPT_STATISTICS},
      {"write", no_argument, &write_files_1, 1},
      {"args", no_argument, &set_args, 1},
      {"l", required_argument, 0, 'l'},
      {"return-child-result", no_argument, &return_child_result, 1},
      {0, no_argument, 0, 0}
    };

    while (1)
      {
	int option_index;

	c = getopt_long_only (argc, argv, "",
			      long_options, &option_index);
	if (c == EOF || set_args)
	  break;

	/* Long option that takes an argument.  */
	if (c == 0 && long_options[option_index].flag == 0)
	  c = long_options[option_index].val;

	switch (c)
	  {
	  case 0:
	    /* Long option that just sets a flag.  */
	    break;
	  case OPT_SE:
	    symarg = optarg;
	    execarg = optarg;
	    break;
	  case OPT_CD:
	    cdarg = optarg;
	    break;
	  case OPT_ANNOTATE:
	    /* FIXME: what if the syntax is wrong (e.g. not digits)?  */
	    annotation_level = atoi (optarg);
	    break;
	  case OPT_STATISTICS:
	    /* Enable the display of both time and space usage.  */
	    set_per_command_time (1);
	    set_per_command_space (1);
	    break;
	  case OPT_TUI:
	    /* --tui is equivalent to -i=tui.  */
#ifdef TUI
	    interpreter_p = INTERP_TUI;
#else
	    error (_("%s: TUI mode is not supported"), gdb_program_name);
#endif
	    break;
	  case OPT_WINDOWS:
	    /* FIXME: cagney/2003-03-01: Not sure if this option is
	       actually useful, and if it is, what it should do.  */
#ifdef GDBTK
	    /* --windows is equivalent to -i=insight.  */
	    interpreter_p = INTERP_INSIGHT;
#endif
	    break;
	  case OPT_NOWINDOWS:
	    /* -nw is equivalent to -i=console.  */
	    interpreter_p = INTERP_CONSOLE;
	    break;
	  case 'f':
	    annotation_level = 1;
	    break;
	  case 's':
	    symarg = optarg;
	    break;
	  case 'e':
	    execarg = optarg;
	    break;
	  case 'c':
	    corearg = optarg;
	    break;
	  case 'p':
	    pidarg = optarg;
	    break;
	  case 'x':
	    cmdarg_vec.emplace_back (CMDARG_FILE, optarg);
	    break;
	  case 'X':
	    cmdarg_vec.emplace_back (CMDARG_COMMAND, optarg);
	    break;
	  case OPT_IX:
	    cmdarg_vec.emplace_back (CMDARG_INIT_FILE, optarg);
	    break;
	  case OPT_IEX:
	    cmdarg_vec.emplace_back (CMDARG_INIT_COMMAND, optarg);
	    break;
	  case OPT_EIX:
	    cmdarg_vec.emplace_back (CMDARG_EARLYINIT_FILE, optarg);
	    break;
	  case OPT_EIEX:
	    cmdarg_vec.emplace_back (CMDARG_EARLYINIT_COMMAND, optarg);
	    break;
	  case 'B':
	    batch_flag = batch_silent = 1;
	    gdb_stdout = new null_file ();
	    break;
	  case 'D':
	    if (optarg[0] == '\0')
	      error (_("%s: empty path for `--data-directory'"),
		     gdb_program_name);
	    set_gdb_data_directory (optarg);
	    gdb_datadir_provided = 1;
	    break;
#ifdef GDBTK
	  case 'z':
	    {
	      if (!gdbtk_test (optarg))
		error (_("%s: unable to load tclcommand file \"%s\""),
		       gdb_program_name, optarg);
	      break;
	    }
	  case 'y':
	    /* Backwards compatibility only.  */
	    break;
	  case 'w':
	    {
	      /* Set the external editor commands when gdb is farming out files
		 to be edited by another program.  */
	      external_editor_command = xstrdup (optarg);
	      break;
	    }
#endif /* GDBTK */
	  case 'i':
	    interpreter_p = optarg;
	    break;
	  case 'd':
	    dirarg.push_back (optarg);
	    break;
	  case 't':
	    ttyarg = optarg;
	    break;
	  case 'q':
	    quiet = 1;
	    break;
	  case 'b':
	    {
	      int rate;
	      char *p;

	      rate = strtol (optarg, &p, 0);
	      if (rate == 0 && p == optarg)
		warning (_("could not set baud rate to `%s'."),
			 optarg);
	      else
		baud_rate = rate;
	    }
	    break;
	  case 'l':
	    {
	      int timeout;
	      char *p;

	      timeout = strtol (optarg, &p, 0);
	      if (timeout == 0 && p == optarg)
		warning (_("could not set timeout limit to `%s'."),
			 optarg);
	      else
		remote_timeout = timeout;
	    }
	    break;

	  case OPT_READNOW:
	    {
	      readnow_symbol_files = 1;
	      validate_readnow_readnever ();
	    }
	    break;

	  case OPT_READNEVER:
	    {
	      readnever_symbol_files = 1;
	      validate_readnow_readnever ();
	    }
	    break;

	  case '?':
	    error (_("Use `%s --help' for a complete list of options."),
		   gdb_program_name);
	  }
      }
    write_files = (write_files_1 != 0);

    if (batch_flag)
      {
	quiet = 1;

	/* Disable all output styling when running in batch mode.  */
	cli_styling = 0;
      }
  }

  save_original_signals_state (quiet);

  /* Try to set up an alternate signal stack for SIGSEGV handlers.  */
  gdb::alternate_signal_stack signal_stack;

  /* Initialize all files.  */
  gdb_init ();

  /* Process early init files and early init options from the command line.  */
  if (!inhibit_gdbinit)
    {
      std::string home_gdbearlyinit;
      get_earlyinit_files (&home_gdbearlyinit);
      if (!home_gdbearlyinit.empty () && !inhibit_home_gdbinit)
	ret = catch_command_errors (source_script,
				    home_gdbearlyinit.c_str (), 0);
    }
  execute_cmdargs (&cmdarg_vec, CMDARG_EARLYINIT_FILE,
		   CMDARG_EARLYINIT_COMMAND, &ret);

  /* Initialize the extension languages.  */
  ext_lang_initialization ();

  /* Recheck if we're starting up quietly after processing the startup
     scripts and commands.  */
  if (!quiet)
    quiet = check_quiet_mode ();

  /* Now that gdb_init has created the initial inferior, we're in
     position to set args for that inferior.  */
  if (set_args)
    {
      /* The remaining options are the command-line options for the
	 inferior.  The first one is the sym/exec file, and the rest
	 are arguments.  */
      if (optind >= argc)
	error (_("%s: `--args' specified but no program specified"),
	       gdb_program_name);

      symarg = argv[optind];
      execarg = argv[optind];
      ++optind;
      set_inferior_args_vector (argc - optind, &argv[optind]);
    }
  else
    {
      /* OK, that's all the options.  */

      /* The first argument, if specified, is the name of the
	 executable.  */
      if (optind < argc)
	{
	  symarg = argv[optind];
	  execarg = argv[optind];
	  optind++;
	}

      /* If the user hasn't already specified a PID or the name of a
	 core file, then a second optional argument is allowed.  If
	 present, this argument should be interpreted as either a
	 PID or a core file, whichever works.  */
      if (pidarg == NULL && corearg == NULL && optind < argc)
	{
	  pid_or_core_arg = argv[optind];
	  optind++;
	}

      /* Any argument left on the command line is unexpected and
	 will be ignored.  Inform the user.  */
      if (optind < argc)
	gdb_printf (gdb_stderr,
		    _("Excess command line "
		      "arguments ignored. (%s%s)\n"),
		    argv[optind],
		    (optind == argc - 1) ? "" : " ...");
    }

  /* Lookup gdbinit files.  Note that the gdbinit file name may be
     overridden during file initialization, so get_init_files should be
     called after gdb_init.  */
  std::vector<std::string> system_gdbinit;
  std::string home_gdbinit;
  std::string local_gdbinit;
  get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);

  /* Do these (and anything which might call wrap_here or *_filtered)
     after initialize_all_files() but before the interpreter has been
     installed.  Otherwize the help/version messages will be eaten by
     the interpreter's output handler.  */

  if (print_version)
    {
      print_gdb_version (gdb_stdout, false);
      gdb_printf ("\n");
      exit (0);
    }

  if (print_help)
    {
      print_gdb_help (gdb_stdout);
      exit (0);
    }

  if (print_configuration)
    {
      print_gdb_configuration (gdb_stdout);
      gdb_printf ("\n");
      exit (0);
    }

  /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
     GDB retain the old MI1 interpreter startup behavior.  Output the
     copyright message before the interpreter is installed.  That way
     it isn't encapsulated in MI output.  */
  if (!quiet && interpreter_p == INTERP_MI1)
    {
      /* Print all the junk at the top, with trailing "..." if we are
	 about to read a symbol file (possibly slowly).  */
      print_gdb_version (gdb_stdout, true);
      if (symarg)
	gdb_printf ("..");
      gdb_printf ("\n");
      gdb_flush (gdb_stdout);	/* Force to screen during slow
				   operations.  */
    }

  /* Install the default UI.  All the interpreters should have had a
     look at things by now.  Initialize the default interpreter.  */
  set_top_level_interpreter (interpreter_p.c_str ());

  /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
     GDB retain the old MI1 interpreter startup behavior.  Output the
     copyright message after the interpreter is installed when it is
     any sane interpreter.  */
  if (!quiet && !current_interp_named_p (INTERP_MI1))
    {
      /* Print all the junk at the top, with trailing "..." if we are
	 about to read a symbol file (possibly slowly).  */
      print_gdb_version (gdb_stdout, true);
      if (symarg)
	gdb_printf ("..");
      gdb_printf ("\n");
      gdb_flush (gdb_stdout);	/* Force to screen during slow
				   operations.  */
    }

  /* Set off error and warning messages with a blank line.  */
  tmp_warn_preprint.reset ();
  warning_pre_print = _("\nwarning: ");

  /* Read and execute the system-wide gdbinit file, if it exists.
     This is done *before* all the command line arguments are
     processed; it sets global parameters, which are independent of
     what file you are debugging or what directory you are in.  */
  if (!system_gdbinit.empty () && !inhibit_gdbinit)
    {
      for (const std::string &file : system_gdbinit)
	ret = catch_command_errors (source_script, file.c_str (), 0);
    }

  /* Read and execute $HOME/.gdbinit file, if it exists.  This is done
     *before* all the command line arguments are processed; it sets
     global parameters, which are independent of what file you are
     debugging or what directory you are in.  */

  if (!home_gdbinit.empty () && !inhibit_gdbinit && !inhibit_home_gdbinit)
    ret = catch_command_errors (source_script, home_gdbinit.c_str (), 0);

  /* Process '-ix' and '-iex' options early.  */
  execute_cmdargs (&cmdarg_vec, CMDARG_INIT_FILE, CMDARG_INIT_COMMAND, &ret);

  /* Now perform all the actions indicated by the arguments.  */
  if (cdarg != NULL)
    {
      ret = catch_command_errors (cd_command, cdarg, 0);
    }

  for (i = 0; i < dirarg.size (); i++)
    ret = catch_command_errors (directory_switch, dirarg[i], 0);

  /* Skip auto-loading section-specified scripts until we've sourced
     local_gdbinit (which is often used to augment the source search
     path).  */
  save_auto_load = global_auto_load;
  global_auto_load = 0;

  if (execarg != NULL
      && symarg != NULL
      && strcmp (execarg, symarg) == 0)
    {
      /* The exec file and the symbol-file are the same.  If we can't
	 open it, better only print one error message.
	 catch_command_errors returns non-zero on success!  */
      ret = catch_command_errors (exec_file_attach, execarg,
				  !batch_flag);
      if (ret != 0)
	ret = catch_command_errors (symbol_file_add_main_adapter,
				    symarg, !batch_flag);
    }
  else
    {
      if (execarg != NULL)
	ret = catch_command_errors (exec_file_attach, execarg,
				    !batch_flag);
      if (symarg != NULL)
	ret = catch_command_errors (symbol_file_add_main_adapter,
				    symarg, !batch_flag);
    }

  if (corearg && pidarg)
    error (_("Can't attach to process and specify "
	     "a core file at the same time."));

  if (corearg != NULL)
    {
      ret = catch_command_errors (core_file_command, corearg,
				  !batch_flag);
    }
  else if (pidarg != NULL)
    {
      ret = catch_command_errors (attach_command, pidarg, !batch_flag);
    }
  else if (pid_or_core_arg)
    {
      /* The user specified 'gdb program pid' or gdb program core'.
	 If pid_or_core_arg's first character is a digit, try attach
	 first and then corefile.  Otherwise try just corefile.  */

      if (isdigit (pid_or_core_arg[0]))
	{
	  ret = catch_command_errors (attach_command, pid_or_core_arg,
				      !batch_flag);
	  if (ret == 0)
	    ret = catch_command_errors (core_file_command,
					pid_or_core_arg,
					!batch_flag);
	}
      else
	{
	  /* Can't be a pid, better be a corefile.  */
	  ret = catch_command_errors (core_file_command,
				      pid_or_core_arg,
				      !batch_flag);
	}
    }

  if (ttyarg != NULL)
    current_inferior ()->set_tty (ttyarg);

  /* Error messages should no longer be distinguished with extra output.  */
  warning_pre_print = _("warning: ");

  /* Read the .gdbinit file in the current directory, *if* it isn't
     the same as the $HOME/.gdbinit file (it should exist, also).  */
  if (!local_gdbinit.empty ())
    {
      auto_load_local_gdbinit_pathname
	= gdb_realpath (local_gdbinit.c_str ()).release ();

      if (!inhibit_gdbinit && auto_load_local_gdbinit)
	{
	  auto_load_debug_printf ("Loading .gdbinit file \"%s\".",
				  local_gdbinit.c_str ());

	  if (file_is_auto_load_safe (local_gdbinit.c_str ()))
	    {
	      auto_load_local_gdbinit_loaded = 1;

	      ret = catch_command_errors (source_script, local_gdbinit.c_str (), 0);
	    }
	}
    }

  /* Now that all .gdbinit's have been read and all -d options have been
     processed, we can read any scripts mentioned in SYMARG.
     We wait until now because it is common to add to the source search
     path in local_gdbinit.  */
  global_auto_load = save_auto_load;
  for (objfile *objfile : current_program_space->objfiles ())
    load_auto_scripts_for_objfile (objfile);

  /* Process '-x' and '-ex' options.  */
  execute_cmdargs (&cmdarg_vec, CMDARG_FILE, CMDARG_COMMAND, &ret);

  /* Read in the old history after all the command files have been
     read.  */
  init_history ();

  if (batch_flag)
    {
      int error_status = EXIT_FAILURE;
      int *exit_arg = ret == 0 ? &error_status : NULL;

      /* We have hit the end of the batch file.  */
      quit_force (exit_arg, 0);
    }
}

static void
captured_main (void *data)
{
  struct captured_main_args *context = (struct captured_main_args *) data;

  captured_main_1 (context);

  /* NOTE: cagney/1999-11-07: There is probably no reason for not
     moving this loop and the code found in captured_command_loop()
     into the command_loop() proper.  The main thing holding back that
     change - SET_TOP_LEVEL() - has been eliminated.  */
  while (1)
    {
      try
	{
	  captured_command_loop ();
	}
      catch (const gdb_exception &ex)
	{
	  exception_print (gdb_stderr, ex);
	}
    }
  /* No exit -- exit is through quit_command.  */
}

int
gdb_main (struct captured_main_args *args)
{
  try
    {
      captured_main (args);
    }
  catch (const gdb_exception &ex)
    {
      exception_print (gdb_stderr, ex);
    }

  /* The only way to end up here is by an error (normal exit is
     handled by quit_force()), hence always return an error status.  */
  return 1;
}


/* Don't use *_filtered for printing help.  We don't want to prompt
   for continue no matter how small the screen or how much we're going
   to print.  */

static void
print_gdb_help (struct ui_file *stream)
{
  std::vector<std::string> system_gdbinit;
  std::string home_gdbinit;
  std::string local_gdbinit;
  std::string home_gdbearlyinit;

  get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
  get_earlyinit_files (&home_gdbearlyinit);

  /* Note: The options in the list below are only approximately sorted
     in the alphabetical order, so as to group closely related options
     together.  */
  gdb_puts (_("\
This is the GNU debugger.  Usage:\n\n\
    gdb [options] [executable-file [core-file or process-id]]\n\
    gdb [options] --args executable-file [inferior-arguments ...]\n\n\
"), stream);
  gdb_puts (_("\
Selection of debuggee and its files:\n\n\
  --args             Arguments after executable-file are passed to inferior.\n\
  --core=COREFILE    Analyze the core dump COREFILE.\n\
  --exec=EXECFILE    Use EXECFILE as the executable.\n\
  --pid=PID          Attach to running process PID.\n\
  --directory=DIR    Search for source files in DIR.\n\
  --se=FILE          Use FILE as symbol file and executable file.\n\
  --symbols=SYMFILE  Read symbols from SYMFILE.\n\
  --readnow          Fully read symbol files on first access.\n\
  --readnever        Do not read symbol files.\n\
  --write            Set writing into executable and core files.\n\n\
"), stream);
  gdb_puts (_("\
Initial commands and command files:\n\n\
  --command=FILE, -x Execute GDB commands from FILE.\n\
  --init-command=FILE, -ix\n\
		     Like -x but execute commands before loading inferior.\n\
  --eval-command=COMMAND, -ex\n\
		     Execute a single GDB command.\n\
		     May be used multiple times and in conjunction\n\
		     with --command.\n\
  --init-eval-command=COMMAND, -iex\n\
		     Like -ex but before loading inferior.\n\
  --nh               Do not read ~/.gdbinit.\n\
  --nx               Do not read any .gdbinit files in any directory.\n\n\
"), stream);
  gdb_puts (_("\
Output and user interface control:\n\n\
  --fullname         Output information used by emacs-GDB interface.\n\
  --interpreter=INTERP\n\
		     Select a specific interpreter / user interface.\n\
  --tty=TTY          Use TTY for input/output by the program being debugged.\n\
  -w                 Use the GUI interface.\n\
  --nw               Do not use the GUI interface.\n\
"), stream);
#if defined(TUI)
  gdb_puts (_("\
  --tui              Use a terminal user interface.\n\
"), stream);
#endif
  gdb_puts (_("\
  -q, --quiet, --silent\n\
		     Do not print version number on startup.\n\n\
"), stream);
  gdb_puts (_("\
Operating modes:\n\n\
  --batch            Exit after processing options.\n\
  --batch-silent     Like --batch, but suppress all gdb stdout output.\n\
  --return-child-result\n\
		     GDB exit code will be the child's exit code.\n\
  --configuration    Print details about GDB configuration and then exit.\n\
  --help             Print this message and then exit.\n\
  --version          Print version information and then exit.\n\n\
Remote debugging options:\n\n\
  -b BAUDRATE        Set serial port baud rate used for remote debugging.\n\
  -l TIMEOUT         Set timeout in seconds for remote debugging.\n\n\
Other options:\n\n\
  --cd=DIR           Change current directory to DIR.\n\
  --data-directory=DIR, -D\n\
		     Set GDB's data-directory to DIR.\n\
"), stream);
  gdb_puts (_("\n\
At startup, GDB reads the following early init files and executes their\n\
commands:\n\
"), stream);
  if (!home_gdbearlyinit.empty ())
    gdb_printf (stream, _("\
   * user-specific early init file: %s\n\
"), home_gdbearlyinit.c_str ());
  if (home_gdbearlyinit.empty ())
    gdb_printf (stream, _("\
   None found.\n"));
  gdb_puts (_("\n\
At startup, GDB reads the following init files and executes their commands:\n\
"), stream);
  if (!system_gdbinit.empty ())
    {
      std::string output;
      for (size_t idx = 0; idx < system_gdbinit.size (); ++idx)
	{
	  output += system_gdbinit[idx];
	  if (idx < system_gdbinit.size () - 1)
	    output += ", ";
	}
      gdb_printf (stream, _("\
   * system-wide init files: %s\n\
"), output.c_str ());
    }
  if (!home_gdbinit.empty ())
    gdb_printf (stream, _("\
   * user-specific init file: %s\n\
"), home_gdbinit.c_str ());
  if (!local_gdbinit.empty ())
    gdb_printf (stream, _("\
   * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
"), local_gdbinit.c_str ());
  if (system_gdbinit.empty () && home_gdbinit.empty ()
      && local_gdbinit.empty ())
    gdb_printf (stream, _("\
   None found.\n"));
  gdb_puts (_("\n\
For more information, type \"help\" from within GDB, or consult the\n\
GDB manual (available as on-line info or a printed manual).\n\
"), stream);
  if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
    gdb_printf (stream, _("\n\
Report bugs to %ps.\n\
"), styled_string (file_name_style.style (), REPORT_BUGS_TO));
  if (stream == gdb_stdout)
    gdb_printf (stream, _("\n\
You can ask GDB-related questions on the GDB users mailing list\n\
(gdb@sourceware.org) or on GDB's IRC channel (#gdb on Freenode).\n"));
}