1 /* Scheme interface to breakpoints.
3 Copyright (C) 2008-2019 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* See README file in this directory for implementation notes, coding
21 conventions, et.al. */
25 #include "breakpoint.h"
27 #include "gdbthread.h"
28 #include "observable.h"
29 #include "cli/cli-script.h"
31 #include "arch-utils.h"
33 #include "guile-internal.h"
36 /* The <gdb:breakpoint> smob.
37 N.B.: The name of this struct is known to breakpoint.h.
39 Note: Breakpoints are added to gdb using a two step process:
40 1) Call make-breakpoint to create a <gdb:breakpoint> object.
41 2) Call register-breakpoint! to add the breakpoint to gdb.
42 It is done this way so that the constructor, make-breakpoint, doesn't have
43 any side-effects. This means that the smob needs to store everything
44 that was passed to make-breakpoint. */
46 typedef struct gdbscm_breakpoint_object
48 /* This always appears first. */
51 /* Non-zero if this breakpoint was created with make-breakpoint. */
54 /* For breakpoints created with make-breakpoint, these are the parameters
55 that were passed to make-breakpoint. These values are not used except
56 to register the breakpoint with GDB. */
59 /* The string representation of the breakpoint.
60 Space for this lives in GC space. */
63 /* The kind of breakpoint.
64 At the moment this can only be one of bp_breakpoint, bp_watchpoint. */
67 /* If a watchpoint, the kind of watchpoint. */
68 enum target_hw_bp_type access_type;
70 /* Non-zero if the breakpoint is an "internal" breakpoint. */
74 /* The breakpoint number according to gdb.
75 For breakpoints created from Scheme, this has the value -1 until the
76 breakpoint is registered with gdb.
77 This is recorded here because BP will be NULL when deleted. */
80 /* The gdb breakpoint object, or NULL if the breakpoint has not been
81 registered yet, or has been deleted. */
82 struct breakpoint *bp;
84 /* Backlink to our containing <gdb:breakpoint> smob.
85 This is needed when we are deleted, we need to unprotect the object
89 /* A stop condition or #f. */
93 static const char breakpoint_smob_name[] = "gdb:breakpoint";
95 /* The tag Guile knows the breakpoint smob by. */
96 static scm_t_bits breakpoint_smob_tag;
98 /* Variables used to pass information between the breakpoint_smob
99 constructor and the breakpoint-created hook function. */
100 static SCM pending_breakpoint_scm = SCM_BOOL_F;
102 /* Keywords used by create-breakpoint!. */
103 static SCM type_keyword;
104 static SCM wp_class_keyword;
105 static SCM internal_keyword;
107 /* Administrivia for breakpoint smobs. */
109 /* The smob "free" function for <gdb:breakpoint>. */
112 bpscm_free_breakpoint_smob (SCM self)
114 breakpoint_smob *bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (self);
117 bp_smob->bp->scm_bp_object = NULL;
119 /* Not necessary, done to catch bugs. */
121 bp_smob->containing_scm = SCM_UNDEFINED;
122 bp_smob->stop = SCM_UNDEFINED;
127 /* Return the name of TYPE.
128 This doesn't handle all types, just the ones we export. */
131 bpscm_type_to_string (enum bptype type)
135 case bp_none: return "BP_NONE";
136 case bp_breakpoint: return "BP_BREAKPOINT";
137 case bp_watchpoint: return "BP_WATCHPOINT";
138 case bp_hardware_watchpoint: return "BP_HARDWARE_WATCHPOINT";
139 case bp_read_watchpoint: return "BP_READ_WATCHPOINT";
140 case bp_access_watchpoint: return "BP_ACCESS_WATCHPOINT";
141 default: return "internal/other";
145 /* Return the name of ENABLE_STATE. */
148 bpscm_enable_state_to_string (enum enable_state enable_state)
150 switch (enable_state)
152 case bp_disabled: return "disabled";
153 case bp_enabled: return "enabled";
154 case bp_call_disabled: return "call_disabled";
155 default: return "unknown";
159 /* The smob "print" function for <gdb:breakpoint>. */
162 bpscm_print_breakpoint_smob (SCM self, SCM port, scm_print_state *pstate)
164 breakpoint_smob *bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (self);
165 struct breakpoint *b = bp_smob->bp;
167 gdbscm_printf (port, "#<%s", breakpoint_smob_name);
169 /* Only print what we export to the user.
170 The rest are possibly internal implementation details. */
172 gdbscm_printf (port, " #%d", bp_smob->number);
174 /* Careful, the breakpoint may be invalid. */
179 gdbscm_printf (port, " %s %s %s",
180 bpscm_type_to_string (b->type),
181 bpscm_enable_state_to_string (b->enable_state),
182 b->silent ? "silent" : "noisy");
184 gdbscm_printf (port, " hit:%d", b->hit_count);
185 gdbscm_printf (port, " ignore:%d", b->ignore_count);
187 str = event_location_to_string (b->location.get ());
189 gdbscm_printf (port, " @%s", str);
192 scm_puts (">", port);
194 scm_remember_upto_here_1 (self);
196 /* Non-zero means success. */
200 /* Low level routine to create a <gdb:breakpoint> object. */
203 bpscm_make_breakpoint_smob (void)
205 breakpoint_smob *bp_smob = (breakpoint_smob *)
206 scm_gc_malloc (sizeof (breakpoint_smob), breakpoint_smob_name);
209 memset (bp_smob, 0, sizeof (*bp_smob));
210 bp_smob->number = -1;
211 bp_smob->stop = SCM_BOOL_F;
212 bp_scm = scm_new_smob (breakpoint_smob_tag, (scm_t_bits) bp_smob);
213 bp_smob->containing_scm = bp_scm;
214 gdbscm_init_gsmob (&bp_smob->base);
219 /* Return non-zero if we want a Scheme wrapper for breakpoint B.
220 If FROM_SCHEME is non-zero,this is called for a breakpoint created
221 by the user from Scheme. Otherwise it is zero. */
224 bpscm_want_scm_wrapper_p (struct breakpoint *bp, int from_scheme)
226 /* Don't create <gdb:breakpoint> objects for internal GDB breakpoints. */
227 if (bp->number < 0 && !from_scheme)
230 /* The others are not supported. */
231 if (bp->type != bp_breakpoint
232 && bp->type != bp_watchpoint
233 && bp->type != bp_hardware_watchpoint
234 && bp->type != bp_read_watchpoint
235 && bp->type != bp_access_watchpoint)
241 /* Install the Scheme side of a breakpoint, CONTAINING_SCM, in
245 bpscm_attach_scm_to_breakpoint (struct breakpoint *bp, SCM containing_scm)
247 breakpoint_smob *bp_smob;
249 bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (containing_scm);
250 bp_smob->number = bp->number;
252 bp_smob->containing_scm = containing_scm;
253 bp_smob->bp->scm_bp_object = bp_smob;
255 /* The owner of this breakpoint is not in GC-controlled memory, so we need
256 to protect it from GC until the breakpoint is deleted. */
257 scm_gc_protect_object (containing_scm);
260 /* Return non-zero if SCM is a breakpoint smob. */
263 bpscm_is_breakpoint (SCM scm)
265 return SCM_SMOB_PREDICATE (breakpoint_smob_tag, scm);
268 /* (breakpoint? scm) -> boolean */
271 gdbscm_breakpoint_p (SCM scm)
273 return scm_from_bool (bpscm_is_breakpoint (scm));
276 /* Returns the <gdb:breakpoint> object in SELF.
277 Throws an exception if SELF is not a <gdb:breakpoint> object. */
280 bpscm_get_breakpoint_arg_unsafe (SCM self, int arg_pos, const char *func_name)
282 SCM_ASSERT_TYPE (bpscm_is_breakpoint (self), self, arg_pos, func_name,
283 breakpoint_smob_name);
288 /* Returns a pointer to the breakpoint smob of SELF.
289 Throws an exception if SELF is not a <gdb:breakpoint> object. */
291 static breakpoint_smob *
292 bpscm_get_breakpoint_smob_arg_unsafe (SCM self, int arg_pos,
293 const char *func_name)
295 SCM bp_scm = bpscm_get_breakpoint_arg_unsafe (self, arg_pos, func_name);
296 breakpoint_smob *bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (bp_scm);
301 /* Return non-zero if breakpoint BP_SMOB is valid. */
304 bpscm_is_valid (breakpoint_smob *bp_smob)
306 return bp_smob->bp != NULL;
309 /* Returns the breakpoint smob in SELF, verifying it's valid.
310 Throws an exception if SELF is not a <gdb:breakpoint> object,
313 static breakpoint_smob *
314 bpscm_get_valid_breakpoint_smob_arg_unsafe (SCM self, int arg_pos,
315 const char *func_name)
317 breakpoint_smob *bp_smob
318 = bpscm_get_breakpoint_smob_arg_unsafe (self, arg_pos, func_name);
320 if (!bpscm_is_valid (bp_smob))
322 gdbscm_invalid_object_error (func_name, arg_pos, self,
323 _("<gdb:breakpoint>"));
329 /* Breakpoint methods. */
331 /* (make-breakpoint string [#:type integer] [#:wp-class integer]
332 [#:internal boolean) -> <gdb:breakpoint>
334 The result is the <gdb:breakpoint> Scheme object.
335 The breakpoint is not available to be used yet, however.
336 It must still be added to gdb with register-breakpoint!. */
339 gdbscm_make_breakpoint (SCM location_scm, SCM rest)
341 const SCM keywords[] = {
342 type_keyword, wp_class_keyword, internal_keyword, SCM_BOOL_F
346 int type_arg_pos = -1, access_type_arg_pos = -1, internal_arg_pos = -1;
347 enum bptype type = bp_breakpoint;
348 enum target_hw_bp_type access_type = hw_write;
351 breakpoint_smob *bp_smob;
353 gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#iit",
354 location_scm, &location, rest,
355 &type_arg_pos, &type,
356 &access_type_arg_pos, &access_type,
357 &internal_arg_pos, &internal);
359 result = bpscm_make_breakpoint_smob ();
360 bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (result);
363 location = gdbscm_gc_xstrdup (s);
369 if (access_type_arg_pos > 0)
371 gdbscm_misc_error (FUNC_NAME, access_type_arg_pos,
372 scm_from_int (access_type),
373 _("access type with breakpoint is not allowed"));
384 gdbscm_out_of_range_error (FUNC_NAME, access_type_arg_pos,
385 scm_from_int (access_type),
386 _("invalid watchpoint class"));
390 gdbscm_out_of_range_error (FUNC_NAME, access_type_arg_pos,
392 _("invalid breakpoint type"));
395 bp_smob->is_scheme_bkpt = 1;
396 bp_smob->spec.location = location;
397 bp_smob->spec.type = type;
398 bp_smob->spec.access_type = access_type;
399 bp_smob->spec.is_internal = internal;
404 /* (register-breakpoint! <gdb:breakpoint>) -> unspecified
406 It is an error to register a breakpoint created outside of Guile,
407 or an already-registered breakpoint. */
410 gdbscm_register_breakpoint_x (SCM self)
412 breakpoint_smob *bp_smob
413 = bpscm_get_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
414 gdbscm_gdb_exception except {};
415 const char *location, *copy;
417 /* We only support registering breakpoints created with make-breakpoint. */
418 if (!bp_smob->is_scheme_bkpt)
419 scm_misc_error (FUNC_NAME, _("not a Scheme breakpoint"), SCM_EOL);
421 if (bpscm_is_valid (bp_smob))
422 scm_misc_error (FUNC_NAME, _("breakpoint is already registered"), SCM_EOL);
424 pending_breakpoint_scm = self;
425 location = bp_smob->spec.location;
426 copy = skip_spaces (location);
427 event_location_up eloc
428 = string_to_event_location_basic (©,
430 symbol_name_match_type::WILD);
434 int internal = bp_smob->spec.is_internal;
436 switch (bp_smob->spec.type)
440 create_breakpoint (get_current_arch (),
441 eloc.get (), NULL, -1, NULL,
446 &bkpt_breakpoint_ops,
452 enum target_hw_bp_type access_type = bp_smob->spec.access_type;
454 if (access_type == hw_write)
455 watch_command_wrapper (location, 0, internal);
456 else if (access_type == hw_access)
457 awatch_command_wrapper (location, 0, internal);
458 else if (access_type == hw_read)
459 rwatch_command_wrapper (location, 0, internal);
461 gdb_assert_not_reached ("invalid access type");
465 gdb_assert_not_reached ("invalid breakpoint type");
468 catch (const gdb_exception &ex)
470 except = unpack (ex);
473 /* Ensure this gets reset, even if there's an error. */
474 pending_breakpoint_scm = SCM_BOOL_F;
475 GDBSCM_HANDLE_GDB_EXCEPTION (except);
477 return SCM_UNSPECIFIED;
480 /* (delete-breakpoint! <gdb:breakpoint>) -> unspecified
481 Scheme function which deletes (removes) the underlying GDB breakpoint
482 from GDB's list of breakpoints. This triggers the breakpoint_deleted
483 observer which will call gdbscm_breakpoint_deleted; that function cleans
484 up the Scheme bits. */
487 gdbscm_delete_breakpoint_x (SCM self)
489 breakpoint_smob *bp_smob
490 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
492 gdbscm_gdb_exception exc {};
495 delete_breakpoint (bp_smob->bp);
497 catch (const gdb_exception &except)
499 exc = unpack (except);
502 GDBSCM_HANDLE_GDB_EXCEPTION (exc);
503 return SCM_UNSPECIFIED;
506 /* iterate_over_breakpoints function for gdbscm_breakpoints. */
509 bpscm_build_bp_list (struct breakpoint *bp, void *arg)
511 SCM *list = (SCM *) arg;
512 breakpoint_smob *bp_smob = bp->scm_bp_object;
514 /* Lazily create wrappers for breakpoints created outside Scheme. */
518 if (bpscm_want_scm_wrapper_p (bp, 0))
522 bp_scm = bpscm_make_breakpoint_smob ();
523 bpscm_attach_scm_to_breakpoint (bp, bp_scm);
525 bp_smob = bp->scm_bp_object;
529 /* Not all breakpoints will have a companion Scheme object.
530 Only breakpoints that trigger the created_breakpoint observer call,
531 and satisfy certain conditions (see bpscm_want_scm_wrapper_p),
532 get a companion object (this includes Scheme-created breakpoints). */
535 *list = scm_cons (bp_smob->containing_scm, *list);
540 /* (breakpoints) -> list
541 Return a list of all breakpoints. */
544 gdbscm_breakpoints (void)
548 /* If iterate_over_breakpoints returns non-NULL it means the iteration
550 In that case abandon building the list and return #f. */
551 if (iterate_over_breakpoints (bpscm_build_bp_list, &list) != NULL)
554 return scm_reverse_x (list, SCM_EOL);
557 /* (breakpoint-valid? <gdb:breakpoint>) -> boolean
558 Returns #t if SELF is still valid. */
561 gdbscm_breakpoint_valid_p (SCM self)
563 breakpoint_smob *bp_smob
564 = bpscm_get_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
566 return scm_from_bool (bpscm_is_valid (bp_smob));
569 /* (breakpoint-enabled? <gdb:breakpoint>) -> boolean */
572 gdbscm_breakpoint_enabled_p (SCM self)
574 breakpoint_smob *bp_smob
575 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
577 return scm_from_bool (bp_smob->bp->enable_state == bp_enabled);
580 /* (set-breakpoint-enabled? <gdb:breakpoint> boolean) -> unspecified */
583 gdbscm_set_breakpoint_enabled_x (SCM self, SCM newvalue)
585 breakpoint_smob *bp_smob
586 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
588 SCM_ASSERT_TYPE (gdbscm_is_bool (newvalue), newvalue, SCM_ARG2, FUNC_NAME,
591 gdbscm_gdb_exception exc {};
594 if (gdbscm_is_true (newvalue))
595 enable_breakpoint (bp_smob->bp);
597 disable_breakpoint (bp_smob->bp);
599 catch (const gdb_exception &except)
601 exc = unpack (except);
604 GDBSCM_HANDLE_GDB_EXCEPTION (exc);
605 return SCM_UNSPECIFIED;
608 /* (breakpoint-silent? <gdb:breakpoint>) -> boolean */
611 gdbscm_breakpoint_silent_p (SCM self)
613 breakpoint_smob *bp_smob
614 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
616 return scm_from_bool (bp_smob->bp->silent);
619 /* (set-breakpoint-silent?! <gdb:breakpoint> boolean) -> unspecified */
622 gdbscm_set_breakpoint_silent_x (SCM self, SCM newvalue)
624 breakpoint_smob *bp_smob
625 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
627 SCM_ASSERT_TYPE (gdbscm_is_bool (newvalue), newvalue, SCM_ARG2, FUNC_NAME,
630 gdbscm_gdb_exception exc {};
633 breakpoint_set_silent (bp_smob->bp, gdbscm_is_true (newvalue));
635 catch (const gdb_exception &except)
637 exc = unpack (except);
640 GDBSCM_HANDLE_GDB_EXCEPTION (exc);
641 return SCM_UNSPECIFIED;
644 /* (breakpoint-ignore-count <gdb:breakpoint>) -> integer */
647 gdbscm_breakpoint_ignore_count (SCM self)
649 breakpoint_smob *bp_smob
650 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
652 return scm_from_long (bp_smob->bp->ignore_count);
655 /* (set-breakpoint-ignore-count! <gdb:breakpoint> integer)
659 gdbscm_set_breakpoint_ignore_count_x (SCM self, SCM newvalue)
661 breakpoint_smob *bp_smob
662 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
665 SCM_ASSERT_TYPE (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX),
666 newvalue, SCM_ARG2, FUNC_NAME, _("integer"));
668 value = scm_to_long (newvalue);
672 gdbscm_gdb_exception exc {};
675 set_ignore_count (bp_smob->number, (int) value, 0);
677 catch (const gdb_exception &except)
679 exc = unpack (except);
682 GDBSCM_HANDLE_GDB_EXCEPTION (exc);
683 return SCM_UNSPECIFIED;
686 /* (breakpoint-hit-count <gdb:breakpoint>) -> integer */
689 gdbscm_breakpoint_hit_count (SCM self)
691 breakpoint_smob *bp_smob
692 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
694 return scm_from_long (bp_smob->bp->hit_count);
697 /* (set-breakpoint-hit-count! <gdb:breakpoint> integer) -> unspecified */
700 gdbscm_set_breakpoint_hit_count_x (SCM self, SCM newvalue)
702 breakpoint_smob *bp_smob
703 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
706 SCM_ASSERT_TYPE (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX),
707 newvalue, SCM_ARG2, FUNC_NAME, _("integer"));
709 value = scm_to_long (newvalue);
715 gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, newvalue,
716 _("hit-count must be zero"));
719 bp_smob->bp->hit_count = 0;
721 return SCM_UNSPECIFIED;
724 /* (breakpoint-thread <gdb:breakpoint>) -> integer */
727 gdbscm_breakpoint_thread (SCM self)
729 breakpoint_smob *bp_smob
730 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
732 if (bp_smob->bp->thread == -1)
735 return scm_from_long (bp_smob->bp->thread);
738 /* (set-breakpoint-thread! <gdb:breakpoint> integer) -> unspecified */
741 gdbscm_set_breakpoint_thread_x (SCM self, SCM newvalue)
743 breakpoint_smob *bp_smob
744 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
747 if (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX))
749 id = scm_to_long (newvalue);
750 if (!valid_global_thread_id (id))
752 gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, newvalue,
753 _("invalid thread id"));
756 else if (gdbscm_is_false (newvalue))
759 SCM_ASSERT_TYPE (0, newvalue, SCM_ARG2, FUNC_NAME, _("integer or #f"));
761 breakpoint_set_thread (bp_smob->bp, id);
763 return SCM_UNSPECIFIED;
766 /* (breakpoint-task <gdb:breakpoint>) -> integer */
769 gdbscm_breakpoint_task (SCM self)
771 breakpoint_smob *bp_smob
772 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
774 if (bp_smob->bp->task == 0)
777 return scm_from_long (bp_smob->bp->task);
780 /* (set-breakpoint-task! <gdb:breakpoint> integer) -> unspecified */
783 gdbscm_set_breakpoint_task_x (SCM self, SCM newvalue)
785 breakpoint_smob *bp_smob
786 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
790 if (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX))
792 id = scm_to_long (newvalue);
794 gdbscm_gdb_exception exc {};
797 valid_id = valid_task_id (id);
799 catch (const gdb_exception &except)
801 exc = unpack (except);
804 GDBSCM_HANDLE_GDB_EXCEPTION (exc);
807 gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, newvalue,
808 _("invalid task id"));
811 else if (gdbscm_is_false (newvalue))
814 SCM_ASSERT_TYPE (0, newvalue, SCM_ARG2, FUNC_NAME, _("integer or #f"));
816 gdbscm_gdb_exception exc {};
819 breakpoint_set_task (bp_smob->bp, id);
821 catch (const gdb_exception &except)
823 exc = unpack (except);
826 GDBSCM_HANDLE_GDB_EXCEPTION (exc);
827 return SCM_UNSPECIFIED;
830 /* (breakpoint-location <gdb:breakpoint>) -> string */
833 gdbscm_breakpoint_location (SCM self)
835 breakpoint_smob *bp_smob
836 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
839 if (bp_smob->bp->type != bp_breakpoint)
842 str = event_location_to_string (bp_smob->bp->location.get ());
846 return gdbscm_scm_from_c_string (str);
849 /* (breakpoint-expression <gdb:breakpoint>) -> string
850 This is only valid for watchpoints.
851 Returns #f for non-watchpoints. */
854 gdbscm_breakpoint_expression (SCM self)
856 breakpoint_smob *bp_smob
857 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
858 struct watchpoint *wp;
860 if (!is_watchpoint (bp_smob->bp))
863 wp = (struct watchpoint *) bp_smob->bp;
865 const char *str = wp->exp_string;
869 return gdbscm_scm_from_c_string (str);
872 /* (breakpoint-condition <gdb:breakpoint>) -> string */
875 gdbscm_breakpoint_condition (SCM self)
877 breakpoint_smob *bp_smob
878 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
881 str = bp_smob->bp->cond_string;
885 return gdbscm_scm_from_c_string (str);
888 /* (set-breakpoint-condition! <gdb:breakpoint> string|#f)
892 gdbscm_set_breakpoint_condition_x (SCM self, SCM newvalue)
894 breakpoint_smob *bp_smob
895 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
897 SCM_ASSERT_TYPE (scm_is_string (newvalue) || gdbscm_is_false (newvalue),
898 newvalue, SCM_ARG2, FUNC_NAME,
901 return gdbscm_wrap ([=]
903 gdb::unique_xmalloc_ptr<char> exp
904 = (gdbscm_is_false (newvalue)
906 : gdbscm_scm_to_c_string (newvalue));
908 set_breakpoint_condition (bp_smob->bp, exp ? exp.get () : "", 0);
910 return SCM_UNSPECIFIED;
914 /* (breakpoint-stop <gdb:breakpoint>) -> procedure or #f */
917 gdbscm_breakpoint_stop (SCM self)
919 breakpoint_smob *bp_smob
920 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
922 return bp_smob->stop;
925 /* (set-breakpoint-stop! <gdb:breakpoint> procedure|#f)
929 gdbscm_set_breakpoint_stop_x (SCM self, SCM newvalue)
931 breakpoint_smob *bp_smob
932 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
933 const struct extension_language_defn *extlang = NULL;
935 SCM_ASSERT_TYPE (gdbscm_is_procedure (newvalue)
936 || gdbscm_is_false (newvalue),
937 newvalue, SCM_ARG2, FUNC_NAME,
938 _("procedure or #f"));
940 if (bp_smob->bp->cond_string != NULL)
941 extlang = get_ext_lang_defn (EXT_LANG_GDB);
943 extlang = get_breakpoint_cond_ext_lang (bp_smob->bp, EXT_LANG_GUILE);
947 = xstrprintf (_("Only one stop condition allowed. There is"
948 " currently a %s stop condition defined for"
949 " this breakpoint."),
950 ext_lang_capitalized_name (extlang));
952 scm_dynwind_begin ((scm_t_dynwind_flags) 0);
953 gdbscm_dynwind_xfree (error_text);
954 gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, error_text);
955 /* The following line, while unnecessary, is present for completeness
960 bp_smob->stop = newvalue;
962 return SCM_UNSPECIFIED;
965 /* (breakpoint-commands <gdb:breakpoint>) -> string */
968 gdbscm_breakpoint_commands (SCM self)
970 breakpoint_smob *bp_smob
971 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
972 struct breakpoint *bp;
977 if (bp->commands == NULL)
982 current_uiout->redirect (&buf);
983 gdbscm_gdb_exception exc {};
986 print_command_lines (current_uiout, breakpoint_commands (bp), 0);
988 catch (const gdb_exception &except)
990 exc = unpack (except);
993 current_uiout->redirect (NULL);
994 GDBSCM_HANDLE_GDB_EXCEPTION (exc);
995 result = gdbscm_scm_from_c_string (buf.c_str ());
1000 /* (breakpoint-type <gdb:breakpoint>) -> integer */
1003 gdbscm_breakpoint_type (SCM self)
1005 breakpoint_smob *bp_smob
1006 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
1008 return scm_from_long (bp_smob->bp->type);
1011 /* (breakpoint-visible? <gdb:breakpoint>) -> boolean */
1014 gdbscm_breakpoint_visible (SCM self)
1016 breakpoint_smob *bp_smob
1017 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
1019 return scm_from_bool (bp_smob->bp->number >= 0);
1022 /* (breakpoint-number <gdb:breakpoint>) -> integer */
1025 gdbscm_breakpoint_number (SCM self)
1027 breakpoint_smob *bp_smob
1028 = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
1030 return scm_from_long (bp_smob->number);
1033 /* Return TRUE if "stop" has been set for this breakpoint.
1035 This is the extension_language_ops.breakpoint_has_cond "method". */
1038 gdbscm_breakpoint_has_cond (const struct extension_language_defn *extlang,
1039 struct breakpoint *b)
1041 breakpoint_smob *bp_smob = b->scm_bp_object;
1043 if (bp_smob == NULL)
1046 return gdbscm_is_procedure (bp_smob->stop);
1049 /* Call the "stop" method in the breakpoint class.
1050 This must only be called if gdbscm_breakpoint_has_cond returns true.
1051 If the stop method returns #t, the inferior will be stopped at the
1052 breakpoint. Otherwise the inferior will be allowed to continue
1053 (assuming other conditions don't indicate "stop").
1055 This is the extension_language_ops.breakpoint_cond_says_stop "method". */
1057 enum ext_lang_bp_stop
1058 gdbscm_breakpoint_cond_says_stop
1059 (const struct extension_language_defn *extlang, struct breakpoint *b)
1061 breakpoint_smob *bp_smob = b->scm_bp_object;
1062 SCM predicate_result;
1065 if (bp_smob == NULL)
1066 return EXT_LANG_BP_STOP_UNSET;
1067 if (!gdbscm_is_procedure (bp_smob->stop))
1068 return EXT_LANG_BP_STOP_UNSET;
1073 = gdbscm_safe_call_1 (bp_smob->stop, bp_smob->containing_scm, NULL);
1075 if (gdbscm_is_exception (predicate_result))
1076 ; /* Exception already printed. */
1077 /* If the "stop" function returns #f that means
1078 the Scheme breakpoint wants GDB to continue. */
1079 else if (gdbscm_is_false (predicate_result))
1082 return stop ? EXT_LANG_BP_STOP_YES : EXT_LANG_BP_STOP_NO;
1085 /* Event callback functions. */
1087 /* Callback that is used when a breakpoint is created.
1088 For breakpoints created by Scheme, i.e., gdbscm_create_breakpoint_x, finish
1089 object creation by connecting the Scheme wrapper to the gdb object.
1090 We ignore breakpoints created from gdb or python here, we create the
1091 Scheme wrapper for those when there's a need to, e.g.,
1092 gdbscm_breakpoints. */
1095 bpscm_breakpoint_created (struct breakpoint *bp)
1099 if (gdbscm_is_false (pending_breakpoint_scm))
1102 /* Verify our caller error checked the user's request. */
1103 gdb_assert (bpscm_want_scm_wrapper_p (bp, 1));
1105 bp_scm = pending_breakpoint_scm;
1106 pending_breakpoint_scm = SCM_BOOL_F;
1108 bpscm_attach_scm_to_breakpoint (bp, bp_scm);
1111 /* Callback that is used when a breakpoint is deleted. This will
1112 invalidate the corresponding Scheme object. */
1115 bpscm_breakpoint_deleted (struct breakpoint *b)
1117 int num = b->number;
1118 struct breakpoint *bp;
1120 /* TODO: Why the lookup? We have B. */
1122 bp = get_breakpoint (num);
1125 breakpoint_smob *bp_smob = bp->scm_bp_object;
1130 bp_smob->number = -1;
1131 bp_smob->stop = SCM_BOOL_F;
1132 scm_gc_unprotect_object (bp_smob->containing_scm);
1137 /* Initialize the Scheme breakpoint code. */
1139 static const scheme_integer_constant breakpoint_integer_constants[] =
1141 { "BP_NONE", bp_none },
1142 { "BP_BREAKPOINT", bp_breakpoint },
1143 { "BP_WATCHPOINT", bp_watchpoint },
1144 { "BP_HARDWARE_WATCHPOINT", bp_hardware_watchpoint },
1145 { "BP_READ_WATCHPOINT", bp_read_watchpoint },
1146 { "BP_ACCESS_WATCHPOINT", bp_access_watchpoint },
1148 { "WP_READ", hw_read },
1149 { "WP_WRITE", hw_write },
1150 { "WP_ACCESS", hw_access },
1152 END_INTEGER_CONSTANTS
1155 static const scheme_function breakpoint_functions[] =
1157 { "make-breakpoint", 1, 0, 1, as_a_scm_t_subr (gdbscm_make_breakpoint),
1159 Create a GDB breakpoint object.\n\
1162 location [#:type <type>] [#:wp-class <wp-class>] [#:internal <bool>]\n\
1164 <gdb:breakpoint object" },
1166 { "register-breakpoint!", 1, 0, 0,
1167 as_a_scm_t_subr (gdbscm_register_breakpoint_x),
1169 Register a <gdb:breakpoint> object with GDB." },
1171 { "delete-breakpoint!", 1, 0, 0, as_a_scm_t_subr (gdbscm_delete_breakpoint_x),
1173 Delete the breakpoint from GDB." },
1175 { "breakpoints", 0, 0, 0, as_a_scm_t_subr (gdbscm_breakpoints),
1177 Return a list of all GDB breakpoints.\n\
1181 { "breakpoint?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_p),
1183 Return #t if the object is a <gdb:breakpoint> object." },
1185 { "breakpoint-valid?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_valid_p),
1187 Return #t if the breakpoint has not been deleted from GDB." },
1189 { "breakpoint-number", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_number),
1191 Return the breakpoint's number." },
1193 { "breakpoint-type", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_type),
1195 Return the type of the breakpoint." },
1197 { "breakpoint-visible?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_visible),
1199 Return #t if the breakpoint is visible to the user." },
1201 { "breakpoint-location", 1, 0, 0,
1202 as_a_scm_t_subr (gdbscm_breakpoint_location),
1204 Return the location of the breakpoint as specified by the user." },
1206 { "breakpoint-expression", 1, 0, 0,
1207 as_a_scm_t_subr (gdbscm_breakpoint_expression),
1209 Return the expression of the breakpoint as specified by the user.\n\
1210 Valid for watchpoints only, returns #f for non-watchpoints." },
1212 { "breakpoint-enabled?", 1, 0, 0,
1213 as_a_scm_t_subr (gdbscm_breakpoint_enabled_p),
1215 Return #t if the breakpoint is enabled." },
1217 { "set-breakpoint-enabled!", 2, 0, 0,
1218 as_a_scm_t_subr (gdbscm_set_breakpoint_enabled_x),
1220 Set the breakpoint's enabled state.\n\
1222 Arguments: <gdb:breakpoint> boolean" },
1224 { "breakpoint-silent?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_silent_p),
1226 Return #t if the breakpoint is silent." },
1228 { "set-breakpoint-silent!", 2, 0, 0,
1229 as_a_scm_t_subr (gdbscm_set_breakpoint_silent_x),
1231 Set the breakpoint's silent state.\n\
1233 Arguments: <gdb:breakpoint> boolean" },
1235 { "breakpoint-ignore-count", 1, 0, 0,
1236 as_a_scm_t_subr (gdbscm_breakpoint_ignore_count),
1238 Return the breakpoint's \"ignore\" count." },
1240 { "set-breakpoint-ignore-count!", 2, 0, 0,
1241 as_a_scm_t_subr (gdbscm_set_breakpoint_ignore_count_x),
1243 Set the breakpoint's \"ignore\" count.\n\
1245 Arguments: <gdb:breakpoint> count" },
1247 { "breakpoint-hit-count", 1, 0, 0,
1248 as_a_scm_t_subr (gdbscm_breakpoint_hit_count),
1250 Return the breakpoint's \"hit\" count." },
1252 { "set-breakpoint-hit-count!", 2, 0, 0,
1253 as_a_scm_t_subr (gdbscm_set_breakpoint_hit_count_x),
1255 Set the breakpoint's \"hit\" count. The value must be zero.\n\
1257 Arguments: <gdb:breakpoint> 0" },
1259 { "breakpoint-thread", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_thread),
1261 Return the breakpoint's global thread id or #f if there isn't one." },
1263 { "set-breakpoint-thread!", 2, 0, 0,
1264 as_a_scm_t_subr (gdbscm_set_breakpoint_thread_x),
1266 Set the global thread id for this breakpoint.\n\
1268 Arguments: <gdb:breakpoint> global-thread-id" },
1270 { "breakpoint-task", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_task),
1272 Return the breakpoint's Ada task-id or #f if there isn't one." },
1274 { "set-breakpoint-task!", 2, 0, 0,
1275 as_a_scm_t_subr (gdbscm_set_breakpoint_task_x),
1277 Set the breakpoint's Ada task-id.\n\
1279 Arguments: <gdb:breakpoint> task-id" },
1281 { "breakpoint-condition", 1, 0, 0,
1282 as_a_scm_t_subr (gdbscm_breakpoint_condition),
1284 Return the breakpoint's condition as specified by the user.\n\
1285 Return #f if there isn't one." },
1287 { "set-breakpoint-condition!", 2, 0, 0,
1288 as_a_scm_t_subr (gdbscm_set_breakpoint_condition_x),
1290 Set the breakpoint's condition.\n\
1292 Arguments: <gdb:breakpoint> condition\n\
1293 condition: a string" },
1295 { "breakpoint-stop", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_stop),
1297 Return the breakpoint's stop predicate.\n\
1298 Return #f if there isn't one." },
1300 { "set-breakpoint-stop!", 2, 0, 0,
1301 as_a_scm_t_subr (gdbscm_set_breakpoint_stop_x),
1303 Set the breakpoint's stop predicate.\n\
1305 Arguments: <gdb:breakpoint> procedure\n\
1306 procedure: A procedure of one argument, the breakpoint.\n\
1307 Its result is true if program execution should stop." },
1309 { "breakpoint-commands", 1, 0, 0,
1310 as_a_scm_t_subr (gdbscm_breakpoint_commands),
1312 Return the breakpoint's commands." },
1318 gdbscm_initialize_breakpoints (void)
1321 = gdbscm_make_smob_type (breakpoint_smob_name, sizeof (breakpoint_smob));
1322 scm_set_smob_free (breakpoint_smob_tag, bpscm_free_breakpoint_smob);
1323 scm_set_smob_print (breakpoint_smob_tag, bpscm_print_breakpoint_smob);
1325 gdb::observers::breakpoint_created.attach (bpscm_breakpoint_created);
1326 gdb::observers::breakpoint_deleted.attach (bpscm_breakpoint_deleted);
1328 gdbscm_define_integer_constants (breakpoint_integer_constants, 1);
1329 gdbscm_define_functions (breakpoint_functions, 1);
1331 type_keyword = scm_from_latin1_keyword ("type");
1332 wp_class_keyword = scm_from_latin1_keyword ("wp-class");
1333 internal_keyword = scm_from_latin1_keyword ("internal");