aboutsummaryrefslogtreecommitdiff
path: root/gdb/guile/scm-breakpoint.c
blob: a32862b0349f8ff43edfd509e46c77dfd204955a (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
/* Scheme interface to breakpoints.

   Copyright (C) 2008-2024 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/>.  */

/* See README file in this directory for implementation notes, coding
   conventions, et.al.  */

#include "value.h"
#include "breakpoint.h"
#include "gdbcmd.h"
#include "gdbthread.h"
#include "observable.h"
#include "cli/cli-script.h"
#include "ada-lang.h"
#include "arch-utils.h"
#include "language.h"
#include "guile-internal.h"
#include "location.h"

/* The <gdb:breakpoint> smob.
   N.B.: The name of this struct is known to breakpoint.h.

   Note: Breakpoints are added to gdb using a two step process:
   1) Call make-breakpoint to create a <gdb:breakpoint> object.
   2) Call register-breakpoint! to add the breakpoint to gdb.
   It is done this way so that the constructor, make-breakpoint, doesn't have
   any side-effects.  This means that the smob needs to store everything
   that was passed to make-breakpoint.  */

typedef struct gdbscm_breakpoint_object
{
  /* This always appears first.  */
  gdb_smob base;

  /* Non-zero if this breakpoint was created with make-breakpoint.  */
  int is_scheme_bkpt;

  /* For breakpoints created with make-breakpoint, these are the parameters
     that were passed to make-breakpoint.  These values are not used except
     to register the breakpoint with GDB.  */
  struct
  {
    /* The string representation of the breakpoint.
       Space for this lives in GC space.  */
    char *location;

    /* The kind of breakpoint.
       At the moment this can only be one of bp_breakpoint, bp_watchpoint.  */
    enum bptype type;

    /* If a watchpoint, the kind of watchpoint.  */
    enum target_hw_bp_type access_type;

    /* Non-zero if the breakpoint is an "internal" breakpoint.  */
    int is_internal;

    /* Non-zero if the breakpoint is temporary.  */
    int is_temporary;
  } spec;

  /* The breakpoint number according to gdb.
     For breakpoints created from Scheme, this has the value -1 until the
     breakpoint is registered with gdb.
     This is recorded here because BP will be NULL when deleted.  */
  int number;

  /* The gdb breakpoint object, or NULL if the breakpoint has not been
     registered yet, or has been deleted.  */
  struct breakpoint *bp;

  /* Backlink to our containing <gdb:breakpoint> smob.
     This is needed when we are deleted, we need to unprotect the object
     from GC.  */
  SCM containing_scm;

  /* A stop condition or #f.  */
  SCM stop;
} breakpoint_smob;

static const char breakpoint_smob_name[] = "gdb:breakpoint";

/* The tag Guile knows the breakpoint smob by.  */
static scm_t_bits breakpoint_smob_tag;

/* Variables used to pass information between the breakpoint_smob
   constructor and the breakpoint-created hook function.  */
static SCM pending_breakpoint_scm = SCM_BOOL_F;

/* Keywords used by create-breakpoint!.  */
static SCM type_keyword;
static SCM wp_class_keyword;
static SCM internal_keyword;
static SCM temporary_keyword;

/* Administrivia for breakpoint smobs.  */

/* The smob "free" function for <gdb:breakpoint>.  */

static size_t
bpscm_free_breakpoint_smob (SCM self)
{
  breakpoint_smob *bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (self);

  if (bp_smob->bp)
    bp_smob->bp->scm_bp_object = NULL;

  /* Not necessary, done to catch bugs.  */
  bp_smob->bp = NULL;
  bp_smob->containing_scm = SCM_UNDEFINED;
  bp_smob->stop = SCM_UNDEFINED;

  return 0;
}

/* Return the name of TYPE.
   This doesn't handle all types, just the ones we export.  */

static const char *
bpscm_type_to_string (enum bptype type)
{
  switch (type)
    {
    case bp_none: return "BP_NONE";
    case bp_breakpoint: return "BP_BREAKPOINT";
    case bp_watchpoint: return "BP_WATCHPOINT";
    case bp_hardware_watchpoint: return "BP_HARDWARE_WATCHPOINT";
    case bp_read_watchpoint: return "BP_READ_WATCHPOINT";
    case bp_access_watchpoint: return "BP_ACCESS_WATCHPOINT";
    case bp_catchpoint: return "BP_CATCHPOINT";
    default: return "internal/other";
    }
}

/* Return the name of ENABLE_STATE.  */

static const char *
bpscm_enable_state_to_string (enum enable_state enable_state)
{
  switch (enable_state)
    {
    case bp_disabled: return "disabled";
    case bp_enabled: return "enabled";
    case bp_call_disabled: return "call_disabled";
    default: return "unknown";
    }
}

/* The smob "print" function for <gdb:breakpoint>.  */

static int
bpscm_print_breakpoint_smob (SCM self, SCM port, scm_print_state *pstate)
{
  breakpoint_smob *bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (self);
  struct breakpoint *b = bp_smob->bp;

  gdbscm_printf (port, "#<%s", breakpoint_smob_name);

  /* Only print what we export to the user.
     The rest are possibly internal implementation details.  */

  gdbscm_printf (port, " #%d", bp_smob->number);

  /* Careful, the breakpoint may be invalid.  */
  if (b != NULL)
    {
      gdbscm_printf (port, " %s %s %s",
		     bpscm_type_to_string (b->type),
		     bpscm_enable_state_to_string (b->enable_state),
		     b->silent ? "silent" : "noisy");

      gdbscm_printf (port, " hit:%d", b->hit_count);
      gdbscm_printf (port, " ignore:%d", b->ignore_count);

      if (b->locspec != nullptr)
	{
	  const char *str = b->locspec->to_string ();
	  if (str != nullptr)
	    gdbscm_printf (port, " @%s", str);
	}
    }

  scm_puts (">", port);

  scm_remember_upto_here_1 (self);

  /* Non-zero means success.  */
  return 1;
}

/* Low level routine to create a <gdb:breakpoint> object.  */

static SCM
bpscm_make_breakpoint_smob (void)
{
  breakpoint_smob *bp_smob = (breakpoint_smob *)
    scm_gc_malloc (sizeof (breakpoint_smob), breakpoint_smob_name);
  SCM bp_scm;

  memset (bp_smob, 0, sizeof (*bp_smob));
  bp_smob->number = -1;
  bp_smob->stop = SCM_BOOL_F;
  bp_scm = scm_new_smob (breakpoint_smob_tag, (scm_t_bits) bp_smob);
  bp_smob->containing_scm = bp_scm;
  gdbscm_init_gsmob (&bp_smob->base);

  return bp_scm;
}

/* Return non-zero if we want a Scheme wrapper for breakpoint B.
   If FROM_SCHEME is non-zero,this is called for a breakpoint created
   by the user from Scheme.  Otherwise it is zero.  */

static int
bpscm_want_scm_wrapper_p (struct breakpoint *bp, int from_scheme)
{
  /* Don't create <gdb:breakpoint> objects for internal GDB breakpoints.  */
  if (bp->number < 0 && !from_scheme)
    return 0;

  /* The others are not supported.  */
  if (bp->type != bp_breakpoint
      && bp->type != bp_watchpoint
      && bp->type != bp_hardware_watchpoint
      && bp->type != bp_read_watchpoint
      && bp->type != bp_access_watchpoint
      && bp->type != bp_catchpoint)
    return 0;

  return 1;
}

/* Install the Scheme side of a breakpoint, CONTAINING_SCM, in
   the gdb side BP.  */

static void
bpscm_attach_scm_to_breakpoint (struct breakpoint *bp, SCM containing_scm)
{
  breakpoint_smob *bp_smob;

  bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (containing_scm);
  bp_smob->number = bp->number;
  bp_smob->bp = bp;
  bp_smob->containing_scm = containing_scm;
  bp_smob->bp->scm_bp_object = bp_smob;

  /* The owner of this breakpoint is not in GC-controlled memory, so we need
     to protect it from GC until the breakpoint is deleted.  */
  scm_gc_protect_object (containing_scm);
}

/* Return non-zero if SCM is a breakpoint smob.  */

static int
bpscm_is_breakpoint (SCM scm)
{
  return SCM_SMOB_PREDICATE (breakpoint_smob_tag, scm);
}

/* (breakpoint? scm) -> boolean */

static SCM
gdbscm_breakpoint_p (SCM scm)
{
  return scm_from_bool (bpscm_is_breakpoint (scm));
}

/* Returns the <gdb:breakpoint> object in SELF.
   Throws an exception if SELF is not a <gdb:breakpoint> object.  */

static SCM
bpscm_get_breakpoint_arg_unsafe (SCM self, int arg_pos, const char *func_name)
{
  SCM_ASSERT_TYPE (bpscm_is_breakpoint (self), self, arg_pos, func_name,
		   breakpoint_smob_name);

  return self;
}

/* Returns a pointer to the breakpoint smob of SELF.
   Throws an exception if SELF is not a <gdb:breakpoint> object.  */

static breakpoint_smob *
bpscm_get_breakpoint_smob_arg_unsafe (SCM self, int arg_pos,
				      const char *func_name)
{
  SCM bp_scm = bpscm_get_breakpoint_arg_unsafe (self, arg_pos, func_name);
  breakpoint_smob *bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (bp_scm);

  return bp_smob;
}

/* Return non-zero if breakpoint BP_SMOB is valid.  */

static int
bpscm_is_valid (breakpoint_smob *bp_smob)
{
  return bp_smob->bp != NULL;
}

/* Returns the breakpoint smob in SELF, verifying it's valid.
   Throws an exception if SELF is not a <gdb:breakpoint> object,
   or is invalid.  */

static breakpoint_smob *
bpscm_get_valid_breakpoint_smob_arg_unsafe (SCM self, int arg_pos,
					    const char *func_name)
{
  breakpoint_smob *bp_smob
    = bpscm_get_breakpoint_smob_arg_unsafe (self, arg_pos, func_name);

  if (!bpscm_is_valid (bp_smob))
    {
      gdbscm_invalid_object_error (func_name, arg_pos, self,
				   _("<gdb:breakpoint>"));
    }

  return bp_smob;
}

/* Breakpoint methods.  */

/* (make-breakpoint string [#:type integer] [#:wp-class integer]
    [#:internal boolean] [#:temporary boolean]) -> <gdb:breakpoint>

   The result is the <gdb:breakpoint> Scheme object.
   The breakpoint is not available to be used yet, however.
   It must still be added to gdb with register-breakpoint!.  */

static SCM
gdbscm_make_breakpoint (SCM location_scm, SCM rest)
{
  const SCM keywords[] = {
    type_keyword, wp_class_keyword, internal_keyword,
    temporary_keyword, SCM_BOOL_F
  };
  char *s;
  char *location;
  int type_arg_pos = -1, access_type_arg_pos = -1,
      internal_arg_pos = -1, temporary_arg_pos = -1;
  int type = bp_breakpoint;
  int access_type = hw_write;
  int internal = 0;
  int temporary = 0;
  SCM result;
  breakpoint_smob *bp_smob;

  gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#iitt",
			      location_scm, &location, rest,
			      &type_arg_pos, &type,
			      &access_type_arg_pos, &access_type,
			      &internal_arg_pos, &internal,
			      &temporary_arg_pos, &temporary);

  result = bpscm_make_breakpoint_smob ();
  bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (result);

  s = location;
  location = gdbscm_gc_xstrdup (s);
  xfree (s);

  switch (type)
    {
    case bp_breakpoint:
      if (access_type_arg_pos > 0)
	{
	  gdbscm_misc_error (FUNC_NAME, access_type_arg_pos,
			     scm_from_int (access_type),
			     _("access type with breakpoint is not allowed"));
	}
      break;
    case bp_watchpoint:
      switch (access_type)
	{
	case hw_write:
	case hw_access:
	case hw_read:
	  break;
	default:
	  gdbscm_out_of_range_error (FUNC_NAME, access_type_arg_pos,
				     scm_from_int (access_type),
				     _("invalid watchpoint class"));
	}
      break;
    case bp_none:
    case bp_hardware_watchpoint:
    case bp_read_watchpoint:
    case bp_access_watchpoint:
    case bp_catchpoint:
      {
	const char *type_name = bpscm_type_to_string ((enum bptype) type);
	gdbscm_misc_error (FUNC_NAME, type_arg_pos,
			   gdbscm_scm_from_c_string (type_name),
			   _("unsupported breakpoint type"));
      }
      break;
    default:
      gdbscm_out_of_range_error (FUNC_NAME, type_arg_pos,
				 scm_from_int (type),
				 _("invalid breakpoint type"));
    }

  bp_smob->is_scheme_bkpt = 1;
  bp_smob->spec.location = location;
  bp_smob->spec.type = (enum bptype) type;
  bp_smob->spec.access_type = (enum target_hw_bp_type) access_type;
  bp_smob->spec.is_internal = internal;
  bp_smob->spec.is_temporary = temporary;

  return result;
}

/* (register-breakpoint! <gdb:breakpoint>) -> unspecified

   It is an error to register a breakpoint created outside of Guile,
   or an already-registered breakpoint.  */

static SCM
gdbscm_register_breakpoint_x (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
  gdbscm_gdb_exception except {};
  const char *location, *copy;

  /* We only support registering breakpoints created with make-breakpoint.  */
  if (!bp_smob->is_scheme_bkpt)
    scm_misc_error (FUNC_NAME, _("not a Scheme breakpoint"), SCM_EOL);

  if (bpscm_is_valid (bp_smob))
    scm_misc_error (FUNC_NAME, _("breakpoint is already registered"), SCM_EOL);

  pending_breakpoint_scm = self;
  location = bp_smob->spec.location;
  copy = skip_spaces (location);
  location_spec_up locspec
    = string_to_location_spec_basic (&copy,
				     current_language,
				     symbol_name_match_type::WILD);

  try
    {
      int internal = bp_smob->spec.is_internal;
      int temporary = bp_smob->spec.is_temporary;

      switch (bp_smob->spec.type)
	{
	case bp_breakpoint:
	  {
	    const breakpoint_ops *ops =
	      breakpoint_ops_for_location_spec (locspec.get (), false);
	    create_breakpoint (get_current_arch (),
			       locspec.get (), NULL, -1, -1, NULL, false,
			       0,
			       temporary, bp_breakpoint,
			       0,
			       AUTO_BOOLEAN_TRUE,
			       ops,
			       0, 1, internal, 0);
	    break;
	  }
	case bp_watchpoint:
	  {
	    enum target_hw_bp_type access_type = bp_smob->spec.access_type;

	    if (access_type == hw_write)
	      watch_command_wrapper (location, 0, internal);
	    else if (access_type == hw_access)
	      awatch_command_wrapper (location, 0, internal);
	    else if (access_type == hw_read)
	      rwatch_command_wrapper (location, 0, internal);
	    else
	      gdb_assert_not_reached ("invalid access type");
	    break;
	  }
	default:
	  gdb_assert_not_reached ("invalid breakpoint type");
	}
    }
  catch (const gdb_exception &ex)
    {
      except = unpack (ex);
    }

  /* Ensure this gets reset, even if there's an error.  */
  pending_breakpoint_scm = SCM_BOOL_F;
  GDBSCM_HANDLE_GDB_EXCEPTION (except);

  return SCM_UNSPECIFIED;
}

/* (delete-breakpoint! <gdb:breakpoint>) -> unspecified
   Scheme function which deletes (removes) the underlying GDB breakpoint
   from GDB's list of breakpoints.  This triggers the breakpoint_deleted
   observer which will call gdbscm_breakpoint_deleted; that function cleans
   up the Scheme bits.  */

static SCM
gdbscm_delete_breakpoint_x (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  gdbscm_gdb_exception exc {};
  try
    {
      delete_breakpoint (bp_smob->bp);
    }
  catch (const gdb_exception &except)
    {
      exc = unpack (except);
    }

  GDBSCM_HANDLE_GDB_EXCEPTION (exc);
  return SCM_UNSPECIFIED;
}

/* iterate_over_breakpoints function for gdbscm_breakpoints.  */

static void
bpscm_build_bp_list (struct breakpoint *bp, SCM *list)
{
  breakpoint_smob *bp_smob = bp->scm_bp_object;

  /* Lazily create wrappers for breakpoints created outside Scheme.  */

  if (bp_smob == NULL)
    {
      if (bpscm_want_scm_wrapper_p (bp, 0))
	{
	  SCM bp_scm;

	  bp_scm = bpscm_make_breakpoint_smob ();
	  bpscm_attach_scm_to_breakpoint (bp, bp_scm);
	  /* Refetch it.  */
	  bp_smob = bp->scm_bp_object;
	}
    }

  /* Not all breakpoints will have a companion Scheme object.
     Only breakpoints that trigger the created_breakpoint observer call,
     and satisfy certain conditions (see bpscm_want_scm_wrapper_p),
     get a companion object (this includes Scheme-created breakpoints).  */

  if (bp_smob != NULL)
    *list = scm_cons (bp_smob->containing_scm, *list);
}

/* (breakpoints) -> list
   Return a list of all breakpoints.  */

static SCM
gdbscm_breakpoints (void)
{
  SCM list = SCM_EOL;

  for (breakpoint &bp : all_breakpoints ())
    bpscm_build_bp_list (&bp, &list);

  return scm_reverse_x (list, SCM_EOL);
}

/* (breakpoint-valid? <gdb:breakpoint>) -> boolean
   Returns #t if SELF is still valid.  */

static SCM
gdbscm_breakpoint_valid_p (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  return scm_from_bool (bpscm_is_valid (bp_smob));
}

/* (breakpoint-enabled? <gdb:breakpoint>) -> boolean */

static SCM
gdbscm_breakpoint_enabled_p (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  return scm_from_bool (bp_smob->bp->enable_state == bp_enabled);
}

/* (set-breakpoint-enabled? <gdb:breakpoint> boolean) -> unspecified */

static SCM
gdbscm_set_breakpoint_enabled_x (SCM self, SCM newvalue)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  SCM_ASSERT_TYPE (gdbscm_is_bool (newvalue), newvalue, SCM_ARG2, FUNC_NAME,
		   _("boolean"));

  gdbscm_gdb_exception exc {};
  try
    {
      if (gdbscm_is_true (newvalue))
	enable_breakpoint (bp_smob->bp);
      else
	disable_breakpoint (bp_smob->bp);
    }
  catch (const gdb_exception &except)
    {
      exc = unpack (except);
    }

  GDBSCM_HANDLE_GDB_EXCEPTION (exc);
  return SCM_UNSPECIFIED;
}

/* (breakpoint-silent? <gdb:breakpoint>) -> boolean */

static SCM
gdbscm_breakpoint_silent_p (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  return scm_from_bool (bp_smob->bp->silent);
}

/* (set-breakpoint-silent?! <gdb:breakpoint> boolean) -> unspecified */

static SCM
gdbscm_set_breakpoint_silent_x (SCM self, SCM newvalue)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  SCM_ASSERT_TYPE (gdbscm_is_bool (newvalue), newvalue, SCM_ARG2, FUNC_NAME,
		   _("boolean"));

  gdbscm_gdb_exception exc {};
  try
    {
      breakpoint_set_silent (bp_smob->bp, gdbscm_is_true (newvalue));
    }
  catch (const gdb_exception &except)
    {
      exc = unpack (except);
    }

  GDBSCM_HANDLE_GDB_EXCEPTION (exc);
  return SCM_UNSPECIFIED;
}

/* (breakpoint-ignore-count <gdb:breakpoint>) -> integer */

static SCM
gdbscm_breakpoint_ignore_count (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  return scm_from_long (bp_smob->bp->ignore_count);
}

/* (set-breakpoint-ignore-count! <gdb:breakpoint> integer)
     -> unspecified */

static SCM
gdbscm_set_breakpoint_ignore_count_x (SCM self, SCM newvalue)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
  long value;

  SCM_ASSERT_TYPE (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX),
		   newvalue, SCM_ARG2, FUNC_NAME, _("integer"));

  value = scm_to_long (newvalue);
  if (value < 0)
    value = 0;

  gdbscm_gdb_exception exc {};
  try
    {
      set_ignore_count (bp_smob->number, (int) value, 0);
    }
  catch (const gdb_exception &except)
    {
      exc = unpack (except);
    }

  GDBSCM_HANDLE_GDB_EXCEPTION (exc);
  return SCM_UNSPECIFIED;
}

/* (breakpoint-hit-count <gdb:breakpoint>) -> integer */

static SCM
gdbscm_breakpoint_hit_count (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  return scm_from_long (bp_smob->bp->hit_count);
}

/* (set-breakpoint-hit-count! <gdb:breakpoint> integer) -> unspecified */

static SCM
gdbscm_set_breakpoint_hit_count_x (SCM self, SCM newvalue)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
  long value;

  SCM_ASSERT_TYPE (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX),
		   newvalue, SCM_ARG2, FUNC_NAME, _("integer"));

  value = scm_to_long (newvalue);
  if (value < 0)
    value = 0;

  if (value != 0)
    {
      gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, newvalue,
				 _("hit-count must be zero"));
    }

  bp_smob->bp->hit_count = 0;

  return SCM_UNSPECIFIED;
}

/* (breakpoint-thread <gdb:breakpoint>) -> integer */

static SCM
gdbscm_breakpoint_thread (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  if (bp_smob->bp->thread == -1)
    return SCM_BOOL_F;

  return scm_from_long (bp_smob->bp->thread);
}

/* (set-breakpoint-thread! <gdb:breakpoint> integer) -> unspecified */

static SCM
gdbscm_set_breakpoint_thread_x (SCM self, SCM newvalue)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
  long id;

  if (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX))
    {
      id = scm_to_long (newvalue);
      if (!valid_global_thread_id (id))
	{
	  gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, newvalue,
				     _("invalid thread id"));
	}

      if (bp_smob->bp->task != -1)
	scm_misc_error (FUNC_NAME,
			_("cannot set both task and thread attributes"),
			SCM_EOL);
    }
  else if (gdbscm_is_false (newvalue))
    id = -1;
  else
    SCM_ASSERT_TYPE (0, newvalue, SCM_ARG2, FUNC_NAME, _("integer or #f"));

  if (bp_smob->bp->inferior != -1 && id != -1)
    scm_misc_error (FUNC_NAME,
		    _("Cannot have both 'thread' and 'inferior' "
		      "conditions on a breakpoint"), SCM_EOL);

  breakpoint_set_thread (bp_smob->bp, id);

  return SCM_UNSPECIFIED;
}

/* (breakpoint-task <gdb:breakpoint>) -> integer */

static SCM
gdbscm_breakpoint_task (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  if (bp_smob->bp->task == -1)
    return SCM_BOOL_F;

  return scm_from_long (bp_smob->bp->task);
}

/* (set-breakpoint-task! <gdb:breakpoint> integer) -> unspecified */

static SCM
gdbscm_set_breakpoint_task_x (SCM self, SCM newvalue)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
  long id;
  int valid_id = 0;

  if (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX))
    {
      id = scm_to_long (newvalue);

      gdbscm_gdb_exception exc {};
      try
	{
	  valid_id = valid_task_id (id);
	}
      catch (const gdb_exception &except)
	{
	  exc = unpack (except);
	}

      GDBSCM_HANDLE_GDB_EXCEPTION (exc);
      if (! valid_id)
	{
	  gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, newvalue,
				     _("invalid task id"));
	}

      if (bp_smob->bp->thread != -1)
	scm_misc_error (FUNC_NAME,
			_("cannot set both task and thread attributes"),
			SCM_EOL);
    }
  else if (gdbscm_is_false (newvalue))
    id = -1;
  else
    SCM_ASSERT_TYPE (0, newvalue, SCM_ARG2, FUNC_NAME, _("integer or #f"));

  gdbscm_gdb_exception exc {};
  try
    {
      breakpoint_set_task (bp_smob->bp, id);
    }
  catch (const gdb_exception &except)
    {
      exc = unpack (except);
    }

  GDBSCM_HANDLE_GDB_EXCEPTION (exc);
  return SCM_UNSPECIFIED;
}

/* (breakpoint-location <gdb:breakpoint>) -> string */

static SCM
gdbscm_breakpoint_location (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  if (bp_smob->bp->type != bp_breakpoint)
    return SCM_BOOL_F;

  const char *str = bp_smob->bp->locspec->to_string ();
  if (str == nullptr)
    str = "";

  return gdbscm_scm_from_c_string (str);
}

/* (breakpoint-expression <gdb:breakpoint>) -> string
   This is only valid for watchpoints.
   Returns #f for non-watchpoints.  */

static SCM
gdbscm_breakpoint_expression (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  if (!is_watchpoint (bp_smob->bp))
    return SCM_BOOL_F;

  watchpoint *wp = gdb::checked_static_cast<watchpoint *> (bp_smob->bp);

  const char *str = wp->exp_string.get ();
  if (! str)
    str = "";

  return gdbscm_scm_from_c_string (str);
}

/* (breakpoint-condition <gdb:breakpoint>) -> string */

static SCM
gdbscm_breakpoint_condition (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
  char *str;

  str = bp_smob->bp->cond_string.get ();
  if (! str)
    return SCM_BOOL_F;

  return gdbscm_scm_from_c_string (str);
}

/* (set-breakpoint-condition! <gdb:breakpoint> string|#f)
   -> unspecified */

static SCM
gdbscm_set_breakpoint_condition_x (SCM self, SCM newvalue)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  SCM_ASSERT_TYPE (scm_is_string (newvalue) || gdbscm_is_false (newvalue),
		   newvalue, SCM_ARG2, FUNC_NAME,
		   _("string or #f"));

  return gdbscm_wrap ([=]
    {
      gdb::unique_xmalloc_ptr<char> exp
	= (gdbscm_is_false (newvalue)
	   ? nullptr
	   : gdbscm_scm_to_c_string (newvalue));

      set_breakpoint_condition (bp_smob->bp, exp ? exp.get () : "", 0, false);

      return SCM_UNSPECIFIED;
    });
}

/* (breakpoint-stop <gdb:breakpoint>) -> procedure or #f */

static SCM
gdbscm_breakpoint_stop (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  return bp_smob->stop;
}

/* (set-breakpoint-stop! <gdb:breakpoint> procedure|#f)
   -> unspecified */

static SCM
gdbscm_set_breakpoint_stop_x (SCM self, SCM newvalue)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
  const struct extension_language_defn *extlang = NULL;

  SCM_ASSERT_TYPE (gdbscm_is_procedure (newvalue)
		   || gdbscm_is_false (newvalue),
		   newvalue, SCM_ARG2, FUNC_NAME,
		   _("procedure or #f"));

  if (bp_smob->bp->cond_string != NULL)
    extlang = get_ext_lang_defn (EXT_LANG_GDB);
  if (extlang == NULL)
    extlang = get_breakpoint_cond_ext_lang (bp_smob->bp, EXT_LANG_GUILE);
  if (extlang != NULL)
    {
      char *error_text
	= xstrprintf (_("Only one stop condition allowed.  There is"
			" currently a %s stop condition defined for"
			" this breakpoint."),
		      ext_lang_capitalized_name (extlang)).release ();

      scm_dynwind_begin ((scm_t_dynwind_flags) 0);
      gdbscm_dynwind_xfree (error_text);
      gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, error_text);
      /* The following line, while unnecessary, is present for completeness
	 sake.  */
      scm_dynwind_end ();
    }

  bp_smob->stop = newvalue;

  return SCM_UNSPECIFIED;
}

/* (breakpoint-commands <gdb:breakpoint>) -> string */

static SCM
gdbscm_breakpoint_commands (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
  struct breakpoint *bp;
  SCM result;

  bp = bp_smob->bp;

  if (bp->commands == NULL)
    return SCM_BOOL_F;

  string_file buf;

  gdbscm_gdb_exception exc {};
  try
    {
      ui_out_redirect_pop redir (current_uiout, &buf);
      print_command_lines (current_uiout, breakpoint_commands (bp), 0);
    }
  catch (const gdb_exception &except)
    {
      exc = unpack (except);
    }

  GDBSCM_HANDLE_GDB_EXCEPTION (exc);
  result = gdbscm_scm_from_c_string (buf.c_str ());

  return result;
}

/* (breakpoint-type <gdb:breakpoint>) -> integer */

static SCM
gdbscm_breakpoint_type (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  return scm_from_long (bp_smob->bp->type);
}

/* (breakpoint-visible? <gdb:breakpoint>) -> boolean */

static SCM
gdbscm_breakpoint_visible (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  return scm_from_bool (bp_smob->bp->number >= 0);
}

/* (breakpoint-number <gdb:breakpoint>) -> integer */

static SCM
gdbscm_breakpoint_number (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  return scm_from_long (bp_smob->number);
}

/* (breakpoint-temporary? <gdb:breakpoint>) -> boolean */

static SCM
gdbscm_breakpoint_temporary (SCM self)
{
  breakpoint_smob *bp_smob
    = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);

  return scm_from_bool (bp_smob->bp->disposition == disp_del
			|| bp_smob->bp->disposition == disp_del_at_next_stop);
}

/* Return TRUE if "stop" has been set for this breakpoint.

   This is the extension_language_ops.breakpoint_has_cond "method".  */

int
gdbscm_breakpoint_has_cond (const struct extension_language_defn *extlang,
			    struct breakpoint *b)
{
  breakpoint_smob *bp_smob = b->scm_bp_object;

  if (bp_smob == NULL)
    return 0;

  return gdbscm_is_procedure (bp_smob->stop);
}

/* Call the "stop" method in the breakpoint class.
   This must only be called if gdbscm_breakpoint_has_cond returns true.
   If the stop method returns #t, the inferior will be stopped at the
   breakpoint.  Otherwise the inferior will be allowed to continue
   (assuming other conditions don't indicate "stop").

   This is the extension_language_ops.breakpoint_cond_says_stop "method".  */

enum ext_lang_bp_stop
gdbscm_breakpoint_cond_says_stop
  (const struct extension_language_defn *extlang, struct breakpoint *b)
{
  breakpoint_smob *bp_smob = b->scm_bp_object;
  SCM predicate_result;
  int stop;

  if (bp_smob == NULL)
    return EXT_LANG_BP_STOP_UNSET;
  if (!gdbscm_is_procedure (bp_smob->stop))
    return EXT_LANG_BP_STOP_UNSET;

  stop = 1;

  predicate_result
    = gdbscm_safe_call_1 (bp_smob->stop, bp_smob->containing_scm, NULL);

  if (gdbscm_is_exception (predicate_result))
    ; /* Exception already printed.  */
  /* If the "stop" function returns #f that means
     the Scheme breakpoint wants GDB to continue.  */
  else if (gdbscm_is_false (predicate_result))
    stop = 0;

  return stop ? EXT_LANG_BP_STOP_YES : EXT_LANG_BP_STOP_NO;
}

/* Event callback functions.  */

/* Callback that is used when a breakpoint is created.
   For breakpoints created by Scheme, i.e., gdbscm_create_breakpoint_x, finish
   object creation by connecting the Scheme wrapper to the gdb object.
   We ignore breakpoints created from gdb or python here, we create the
   Scheme wrapper for those when there's a need to, e.g.,
   gdbscm_breakpoints.  */

static void
bpscm_breakpoint_created (struct breakpoint *bp)
{
  SCM bp_scm;

  if (gdbscm_is_false (pending_breakpoint_scm))
    return;

  /* Verify our caller error checked the user's request.  */
  gdb_assert (bpscm_want_scm_wrapper_p (bp, 1));

  bp_scm = pending_breakpoint_scm;
  pending_breakpoint_scm = SCM_BOOL_F;

  bpscm_attach_scm_to_breakpoint (bp, bp_scm);
}

/* Callback that is used when a breakpoint is deleted.  This will
   invalidate the corresponding Scheme object.  */

static void
bpscm_breakpoint_deleted (struct breakpoint *b)
{
  int num = b->number;
  struct breakpoint *bp;

  /* TODO: Why the lookup?  We have B.  */

  bp = get_breakpoint (num);
  if (bp)
    {
      breakpoint_smob *bp_smob = bp->scm_bp_object;

      if (bp_smob)
	{
	  bp_smob->bp = NULL;
	  bp_smob->number = -1;
	  bp_smob->stop = SCM_BOOL_F;
	  scm_gc_unprotect_object (bp_smob->containing_scm);
	}
    }
}

/* Initialize the Scheme breakpoint code.  */

static const scheme_integer_constant breakpoint_integer_constants[] =
{
  { "BP_NONE", bp_none },
  { "BP_BREAKPOINT", bp_breakpoint },
  { "BP_WATCHPOINT", bp_watchpoint },
  { "BP_HARDWARE_WATCHPOINT", bp_hardware_watchpoint },
  { "BP_READ_WATCHPOINT", bp_read_watchpoint },
  { "BP_ACCESS_WATCHPOINT", bp_access_watchpoint },
  { "BP_CATCHPOINT", bp_catchpoint },

  { "WP_READ", hw_read },
  { "WP_WRITE", hw_write },
  { "WP_ACCESS", hw_access },

  END_INTEGER_CONSTANTS
};

static const scheme_function breakpoint_functions[] =
{
  { "make-breakpoint", 1, 0, 1, as_a_scm_t_subr (gdbscm_make_breakpoint),
    "\
Create a GDB breakpoint object.\n\
\n\
  Arguments:\n\
    location [#:type <type>] [#:wp-class <wp-class>] [#:internal <bool>] [#:temporary <bool>]\n\
  Returns:\n\
    <gdb:breakpoint> object" },

  { "register-breakpoint!", 1, 0, 0,
    as_a_scm_t_subr (gdbscm_register_breakpoint_x),
    "\
Register a <gdb:breakpoint> object with GDB." },

  { "delete-breakpoint!", 1, 0, 0, as_a_scm_t_subr (gdbscm_delete_breakpoint_x),
    "\
Delete the breakpoint from GDB." },

  { "breakpoints", 0, 0, 0, as_a_scm_t_subr (gdbscm_breakpoints),
    "\
Return a list of all GDB breakpoints.\n\
\n\
  Arguments: none" },

  { "breakpoint?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_p),
    "\
Return #t if the object is a <gdb:breakpoint> object." },

  { "breakpoint-valid?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_valid_p),
    "\
Return #t if the breakpoint has not been deleted from GDB." },

  { "breakpoint-number", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_number),
    "\
Return the breakpoint's number." },

  { "breakpoint-temporary?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_temporary),
    "\
Return #t if the breakpoint is a temporary breakpoint." },

  { "breakpoint-type", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_type),
    "\
Return the type of the breakpoint." },

  { "breakpoint-visible?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_visible),
    "\
Return #t if the breakpoint is visible to the user." },

  { "breakpoint-location", 1, 0, 0,
    as_a_scm_t_subr (gdbscm_breakpoint_location),
    "\
Return the location of the breakpoint as specified by the user." },

  { "breakpoint-expression", 1, 0, 0,
    as_a_scm_t_subr (gdbscm_breakpoint_expression),
    "\
Return the expression of the breakpoint as specified by the user.\n\
Valid for watchpoints only, returns #f for non-watchpoints." },

  { "breakpoint-enabled?", 1, 0, 0,
    as_a_scm_t_subr (gdbscm_breakpoint_enabled_p),
    "\
Return #t if the breakpoint is enabled." },

  { "set-breakpoint-enabled!", 2, 0, 0,
    as_a_scm_t_subr (gdbscm_set_breakpoint_enabled_x),
    "\
Set the breakpoint's enabled state.\n\
\n\
  Arguments: <gdb:breakpoint> boolean" },

  { "breakpoint-silent?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_silent_p),
    "\
Return #t if the breakpoint is silent." },

  { "set-breakpoint-silent!", 2, 0, 0,
    as_a_scm_t_subr (gdbscm_set_breakpoint_silent_x),
    "\
Set the breakpoint's silent state.\n\
\n\
  Arguments: <gdb:breakpoint> boolean" },

  { "breakpoint-ignore-count", 1, 0, 0,
    as_a_scm_t_subr (gdbscm_breakpoint_ignore_count),
    "\
Return the breakpoint's \"ignore\" count." },

  { "set-breakpoint-ignore-count!", 2, 0, 0,
    as_a_scm_t_subr (gdbscm_set_breakpoint_ignore_count_x),
    "\
Set the breakpoint's \"ignore\" count.\n\
\n\
  Arguments: <gdb:breakpoint> count" },

  { "breakpoint-hit-count", 1, 0, 0,
    as_a_scm_t_subr (gdbscm_breakpoint_hit_count),
    "\
Return the breakpoint's \"hit\" count." },

  { "set-breakpoint-hit-count!", 2, 0, 0,
    as_a_scm_t_subr (gdbscm_set_breakpoint_hit_count_x),
    "\
Set the breakpoint's \"hit\" count.  The value must be zero.\n\
\n\
  Arguments: <gdb:breakpoint> 0" },

  { "breakpoint-thread", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_thread),
    "\
Return the breakpoint's global thread id or #f if there isn't one." },

  { "set-breakpoint-thread!", 2, 0, 0,
    as_a_scm_t_subr (gdbscm_set_breakpoint_thread_x),
    "\
Set the global thread id for this breakpoint.\n\
\n\
  Arguments: <gdb:breakpoint> global-thread-id" },

  { "breakpoint-task", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_task),
    "\
Return the breakpoint's Ada task-id or #f if there isn't one." },

  { "set-breakpoint-task!", 2, 0, 0,
    as_a_scm_t_subr (gdbscm_set_breakpoint_task_x),
    "\
Set the breakpoint's Ada task-id.\n\
\n\
  Arguments: <gdb:breakpoint> task-id" },

  { "breakpoint-condition", 1, 0, 0,
    as_a_scm_t_subr (gdbscm_breakpoint_condition),
    "\
Return the breakpoint's condition as specified by the user.\n\
Return #f if there isn't one." },

  { "set-breakpoint-condition!", 2, 0, 0,
    as_a_scm_t_subr (gdbscm_set_breakpoint_condition_x),
    "\
Set the breakpoint's condition.\n\
\n\
  Arguments: <gdb:breakpoint> condition\n\
    condition: a string" },

  { "breakpoint-stop", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_stop),
    "\
Return the breakpoint's stop predicate.\n\
Return #f if there isn't one." },

  { "set-breakpoint-stop!", 2, 0, 0,
    as_a_scm_t_subr (gdbscm_set_breakpoint_stop_x),
    "\
Set the breakpoint's stop predicate.\n\
\n\
  Arguments: <gdb:breakpoint> procedure\n\
    procedure: A procedure of one argument, the breakpoint.\n\
      Its result is true if program execution should stop." },

  { "breakpoint-commands", 1, 0, 0,
    as_a_scm_t_subr (gdbscm_breakpoint_commands),
    "\
Return the breakpoint's commands." },

  END_FUNCTIONS
};

void
gdbscm_initialize_breakpoints (void)
{
  breakpoint_smob_tag
    = gdbscm_make_smob_type (breakpoint_smob_name, sizeof (breakpoint_smob));
  scm_set_smob_free (breakpoint_smob_tag, bpscm_free_breakpoint_smob);
  scm_set_smob_print (breakpoint_smob_tag, bpscm_print_breakpoint_smob);

  gdb::observers::breakpoint_created.attach (bpscm_breakpoint_created,
					     "scm-breakpoint");
  gdb::observers::breakpoint_deleted.attach (bpscm_breakpoint_deleted,
					     "scm-breakpoint");

  gdbscm_define_integer_constants (breakpoint_integer_constants, 1);
  gdbscm_define_functions (breakpoint_functions, 1);

  type_keyword = scm_from_latin1_keyword ("type");
  wp_class_keyword = scm_from_latin1_keyword ("wp-class");
  internal_keyword = scm_from_latin1_keyword ("internal");
  temporary_keyword = scm_from_latin1_keyword ("temporary");
}