1 /* Everything about breakpoints, for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008, 2009 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "breakpoint.h"
28 #include "tracepoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
55 #include "exceptions.h"
62 /* readline include files */
63 #include "readline/readline.h"
64 #include "readline/history.h"
66 /* readline defines this. */
69 #include "mi/mi-common.h"
71 /* Arguments to pass as context to some catch command handlers. */
72 #define CATCH_PERMANENT ((void *) (uintptr_t) 0)
73 #define CATCH_TEMPORARY ((void *) (uintptr_t) 1)
75 /* Prototypes for local functions. */
77 static void enable_delete_command (char *, int);
79 static void enable_delete_breakpoint (struct breakpoint *);
81 static void enable_once_command (char *, int);
83 static void enable_once_breakpoint (struct breakpoint *);
85 static void disable_command (char *, int);
87 static void enable_command (char *, int);
89 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *));
91 static void ignore_command (char *, int);
93 static int breakpoint_re_set_one (void *);
95 static void clear_command (char *, int);
97 static void catch_command (char *, int);
99 static void watch_command (char *, int);
101 static int can_use_hardware_watchpoint (struct value *);
103 static void break_command_1 (char *, int, int);
105 static void mention (struct breakpoint *);
107 struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype);
109 static void check_duplicates (struct breakpoint *);
111 static void breakpoint_adjustment_warning (CORE_ADDR, CORE_ADDR, int, int);
113 static CORE_ADDR adjust_breakpoint_address (CORE_ADDR bpaddr,
116 static void describe_other_breakpoints (CORE_ADDR, struct obj_section *, int);
118 static void breakpoints_info (char *, int);
120 static void breakpoint_1 (int, int);
122 static bpstat bpstat_alloc (const struct bp_location *, bpstat);
124 static int breakpoint_cond_eval (void *);
126 static void cleanup_executing_breakpoints (void *);
128 static void commands_command (char *, int);
130 static void condition_command (char *, int);
132 static int get_number_trailer (char **, int);
134 void set_breakpoint_count (int);
143 static int remove_breakpoint (struct bp_location *, insertion_state_t);
145 static enum print_stop_action print_it_typical (bpstat);
147 static enum print_stop_action print_bp_stop_message (bpstat bs);
149 static int watchpoint_check (void *);
151 static void maintenance_info_breakpoints (char *, int);
153 static int hw_breakpoint_used_count (void);
155 static int hw_watchpoint_used_count (enum bptype, int *);
157 static void hbreak_command (char *, int);
159 static void thbreak_command (char *, int);
161 static void watch_command_1 (char *, int, int);
163 static void rwatch_command (char *, int);
165 static void awatch_command (char *, int);
167 static void do_enable_breakpoint (struct breakpoint *, enum bpdisp);
169 static void stop_command (char *arg, int from_tty);
171 static void stopin_command (char *arg, int from_tty);
173 static void stopat_command (char *arg, int from_tty);
175 static char *ep_parse_optional_if_clause (char **arg);
177 static char *ep_parse_optional_filename (char **arg);
179 static void catch_exception_command_1 (enum exception_event_kind ex_event,
180 char *arg, int tempflag, int from_tty);
182 static void tcatch_command (char *arg, int from_tty);
184 static void ep_skip_leading_whitespace (char **s);
186 static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc);
188 static void free_bp_location (struct bp_location *loc);
190 static struct bp_location *allocate_bp_location (struct breakpoint *bpt);
192 static void update_global_location_list (int);
194 static void update_global_location_list_nothrow (int);
196 static int is_hardware_watchpoint (struct breakpoint *bpt);
198 static void insert_breakpoint_locations (void);
200 static void tracepoints_info (char *, int);
202 static void delete_trace_command (char *, int);
204 static void enable_trace_command (char *, int);
206 static void disable_trace_command (char *, int);
208 static void trace_pass_command (char *, int);
210 /* Flag indicating that a command has proceeded the inferior past the
211 current breakpoint. */
213 static int breakpoint_proceeded;
216 bpdisp_text (enum bpdisp disp)
218 /* NOTE: the following values are a part of MI protocol and represent
219 values of 'disp' field returned when inferior stops at a breakpoint. */
220 static char *bpdisps[] = {"del", "dstp", "dis", "keep"};
221 return bpdisps[(int) disp];
224 /* Prototypes for exported functions. */
225 /* If FALSE, gdb will not use hardware support for watchpoints, even
226 if such is available. */
227 static int can_use_hw_watchpoints;
230 show_can_use_hw_watchpoints (struct ui_file *file, int from_tty,
231 struct cmd_list_element *c,
234 fprintf_filtered (file, _("\
235 Debugger's willingness to use watchpoint hardware is %s.\n"),
239 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
240 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
241 for unrecognized breakpoint locations.
242 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
243 static enum auto_boolean pending_break_support;
245 show_pending_break_support (struct ui_file *file, int from_tty,
246 struct cmd_list_element *c,
249 fprintf_filtered (file, _("\
250 Debugger's behavior regarding pending breakpoints is %s.\n"),
254 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
255 set with "break" but falling in read-only memory.
256 If 0, gdb will warn about such breakpoints, but won't automatically
257 use hardware breakpoints. */
258 static int automatic_hardware_breakpoints;
260 show_automatic_hardware_breakpoints (struct ui_file *file, int from_tty,
261 struct cmd_list_element *c,
264 fprintf_filtered (file, _("\
265 Automatic usage of hardware breakpoints is %s.\n"),
269 /* If on, gdb will keep breakpoints inserted even as inferior is
270 stopped, and immediately insert any new breakpoints. If off, gdb
271 will insert breakpoints into inferior only when resuming it, and
272 will remove breakpoints upon stop. If auto, GDB will behave as ON
273 if in non-stop mode, and as OFF if all-stop mode.*/
275 static const char always_inserted_auto[] = "auto";
276 static const char always_inserted_on[] = "on";
277 static const char always_inserted_off[] = "off";
278 static const char *always_inserted_enums[] = {
279 always_inserted_auto,
284 static const char *always_inserted_mode = always_inserted_auto;
286 show_always_inserted_mode (struct ui_file *file, int from_tty,
287 struct cmd_list_element *c, const char *value)
289 if (always_inserted_mode == always_inserted_auto)
290 fprintf_filtered (file, _("\
291 Always inserted breakpoint mode is %s (currently %s).\n"),
293 breakpoints_always_inserted_mode () ? "on" : "off");
295 fprintf_filtered (file, _("Always inserted breakpoint mode is %s.\n"), value);
299 breakpoints_always_inserted_mode (void)
301 return (always_inserted_mode == always_inserted_on
302 || (always_inserted_mode == always_inserted_auto && non_stop));
305 void _initialize_breakpoint (void);
307 /* Are we executing breakpoint commands? */
308 static int executing_breakpoint_commands;
310 /* Are overlay event breakpoints enabled? */
311 static int overlay_events_enabled;
313 /* Walk the following statement or block through all breakpoints.
314 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
317 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
319 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
320 for (B = breakpoint_chain; \
321 B ? (TMP=B->next, 1): 0; \
324 /* Similar iterators for the low-level breakpoints. */
326 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->global_next)
328 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
329 for (B = bp_location_chain; \
330 B ? (TMP=B->global_next, 1): 0; \
333 /* Iterator for tracepoints only. */
335 #define ALL_TRACEPOINTS(B) \
336 for (B = breakpoint_chain; B; B = B->next) \
337 if ((B)->type == bp_tracepoint)
339 /* Chains of all breakpoints defined. */
341 struct breakpoint *breakpoint_chain;
343 struct bp_location *bp_location_chain;
345 /* The locations that no longer correspond to any breakpoint,
346 unlinked from bp_location_chain, but for which a hit
347 may still be reported by a target. */
348 VEC(bp_location_p) *moribund_locations = NULL;
350 /* Number of last breakpoint made. */
352 int breakpoint_count;
354 /* Number of last tracepoint made. */
356 int tracepoint_count;
358 /* Return whether a breakpoint is an active enabled breakpoint. */
360 breakpoint_enabled (struct breakpoint *b)
362 return (b->enable_state == bp_enabled);
365 /* Set breakpoint count to NUM. */
368 set_breakpoint_count (int num)
370 breakpoint_count = num;
371 set_internalvar (lookup_internalvar ("bpnum"),
372 value_from_longest (builtin_type_int32, (LONGEST) num));
375 /* Used in run_command to zero the hit count when a new run starts. */
378 clear_breakpoint_hit_counts (void)
380 struct breakpoint *b;
386 /* Default address, symtab and line to put a breakpoint at
387 for "break" command with no arg.
388 if default_breakpoint_valid is zero, the other three are
389 not valid, and "break" with no arg is an error.
391 This set by print_stack_frame, which calls set_default_breakpoint. */
393 int default_breakpoint_valid;
394 CORE_ADDR default_breakpoint_address;
395 struct symtab *default_breakpoint_symtab;
396 int default_breakpoint_line;
398 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
399 Advance *PP after the string and any trailing whitespace.
401 Currently the string can either be a number or "$" followed by the name
402 of a convenience variable. Making it an expression wouldn't work well
403 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
405 If the string is a NULL pointer, that denotes the last breakpoint.
407 TRAILER is a character which can be found after the number; most
408 commonly this is `-'. If you don't want a trailer, use \0. */
410 get_number_trailer (char **pp, int trailer)
412 int retval = 0; /* default */
416 /* Empty line means refer to the last breakpoint. */
417 return breakpoint_count;
420 /* Make a copy of the name, so we can null-terminate it
421 to pass to lookup_internalvar(). */
426 while (isalnum (*p) || *p == '_')
428 varname = (char *) alloca (p - start + 1);
429 strncpy (varname, start, p - start);
430 varname[p - start] = '\0';
431 val = value_of_internalvar (lookup_internalvar (varname));
432 if (TYPE_CODE (value_type (val)) == TYPE_CODE_INT)
433 retval = (int) value_as_long (val);
436 printf_filtered (_("Convenience variable must have integer value.\n"));
444 while (*p >= '0' && *p <= '9')
447 /* There is no number here. (e.g. "cond a == b"). */
449 /* Skip non-numeric token */
450 while (*p && !isspace((int) *p))
452 /* Return zero, which caller must interpret as error. */
458 if (!(isspace (*p) || *p == '\0' || *p == trailer))
460 /* Trailing junk: return 0 and let caller print error msg. */
461 while (!(isspace (*p) || *p == '\0' || *p == trailer))
472 /* Like get_number_trailer, but don't allow a trailer. */
474 get_number (char **pp)
476 return get_number_trailer (pp, '\0');
479 /* Parse a number or a range.
480 * A number will be of the form handled by get_number.
481 * A range will be of the form <number1> - <number2>, and
482 * will represent all the integers between number1 and number2,
485 * While processing a range, this fuction is called iteratively;
486 * At each call it will return the next value in the range.
488 * At the beginning of parsing a range, the char pointer PP will
489 * be advanced past <number1> and left pointing at the '-' token.
490 * Subsequent calls will not advance the pointer until the range
491 * is completed. The call that completes the range will advance
492 * pointer PP past <number2>.
496 get_number_or_range (char **pp)
498 static int last_retval, end_value;
499 static char *end_ptr;
500 static int in_range = 0;
504 /* Default case: pp is pointing either to a solo number,
505 or to the first number of a range. */
506 last_retval = get_number_trailer (pp, '-');
511 /* This is the start of a range (<number1> - <number2>).
512 Skip the '-', parse and remember the second number,
513 and also remember the end of the final token. */
517 while (isspace ((int) *end_ptr))
518 end_ptr++; /* skip white space */
519 end_value = get_number (temp);
520 if (end_value < last_retval)
522 error (_("inverted range"));
524 else if (end_value == last_retval)
526 /* degenerate range (number1 == number2). Advance the
527 token pointer so that the range will be treated as a
536 error (_("negative value"));
539 /* pp points to the '-' that betokens a range. All
540 number-parsing has already been done. Return the next
541 integer value (one greater than the saved previous value).
542 Do not advance the token pointer 'pp' until the end of range
545 if (++last_retval == end_value)
547 /* End of range reached; advance token pointer. */
557 /* condition N EXP -- set break condition of breakpoint N to EXP. */
560 condition_command (char *arg, int from_tty)
562 struct breakpoint *b;
567 error_no_arg (_("breakpoint number"));
570 bnum = get_number (&p);
572 error (_("Bad breakpoint argument: '%s'"), arg);
575 if (b->number == bnum)
577 struct bp_location *loc = b->loc;
578 for (; loc; loc = loc->next)
586 if (b->cond_string != NULL)
587 xfree (b->cond_string);
591 b->cond_string = NULL;
593 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum);
598 /* I don't know if it matters whether this is the string the user
599 typed in or the decompiled expression. */
600 b->cond_string = savestring (arg, strlen (arg));
601 b->condition_not_parsed = 0;
602 for (loc = b->loc; loc; loc = loc->next)
606 parse_exp_1 (&arg, block_for_pc (loc->address), 0);
608 error (_("Junk at end of expression"));
611 breakpoints_changed ();
612 observer_notify_breakpoint_modified (b->number);
616 error (_("No breakpoint number %d."), bnum);
620 commands_command (char *arg, int from_tty)
622 struct breakpoint *b;
625 struct command_line *l;
627 /* If we allowed this, we would have problems with when to
628 free the storage, if we change the commands currently
631 if (executing_breakpoint_commands)
632 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
635 bnum = get_number (&p);
638 error (_("Unexpected extra arguments following breakpoint number."));
641 if (b->number == bnum)
643 char *tmpbuf = xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
645 struct cleanup *cleanups = make_cleanup (xfree, tmpbuf);
646 l = read_command_lines (tmpbuf, from_tty, 1);
647 do_cleanups (cleanups);
648 free_command_lines (&b->commands);
650 breakpoints_changed ();
651 observer_notify_breakpoint_modified (b->number);
654 error (_("No breakpoint number %d."), bnum);
657 /* Like commands_command, but instead of reading the commands from
658 input stream, takes them from an already parsed command structure.
660 This is used by cli-script.c to DTRT with breakpoint commands
661 that are part of if and while bodies. */
662 enum command_control_type
663 commands_from_control_command (char *arg, struct command_line *cmd)
665 struct breakpoint *b;
669 /* If we allowed this, we would have problems with when to
670 free the storage, if we change the commands currently
673 if (executing_breakpoint_commands)
674 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
676 /* An empty string for the breakpoint number means the last
677 breakpoint, but get_number expects a NULL pointer. */
682 bnum = get_number (&p);
685 error (_("Unexpected extra arguments following breakpoint number."));
688 if (b->number == bnum)
690 free_command_lines (&b->commands);
691 if (cmd->body_count != 1)
692 error (_("Invalid \"commands\" block structure."));
693 /* We need to copy the commands because if/while will free the
694 list after it finishes execution. */
695 b->commands = copy_command_lines (cmd->body_list[0]);
696 breakpoints_changed ();
697 observer_notify_breakpoint_modified (b->number);
698 return simple_control;
700 error (_("No breakpoint number %d."), bnum);
703 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
704 by replacing any memory breakpoints with their shadowed contents. */
707 breakpoint_restore_shadows (gdb_byte *buf, ULONGEST memaddr, LONGEST len)
709 struct bp_location *b;
710 CORE_ADDR bp_addr = 0;
716 if (b->owner->type == bp_none)
717 warning (_("reading through apparently deleted breakpoint #%d?"),
720 if (b->loc_type != bp_loc_software_breakpoint)
724 /* Addresses and length of the part of the breakpoint that
726 bp_addr = b->target_info.placed_address;
727 bp_size = b->target_info.shadow_len;
729 /* bp isn't valid, or doesn't shadow memory. */
732 if (bp_addr + bp_size <= memaddr)
733 /* The breakpoint is entirely before the chunk of memory we
737 if (bp_addr >= memaddr + len)
738 /* The breakpoint is entirely after the chunk of memory we are
742 /* Offset within shadow_contents. */
743 if (bp_addr < memaddr)
745 /* Only copy the second part of the breakpoint. */
746 bp_size -= memaddr - bp_addr;
747 bptoffset = memaddr - bp_addr;
751 if (bp_addr + bp_size > memaddr + len)
753 /* Only copy the first part of the breakpoint. */
754 bp_size -= (bp_addr + bp_size) - (memaddr + len);
757 memcpy (buf + bp_addr - memaddr,
758 b->target_info.shadow_contents + bptoffset, bp_size);
763 /* A wrapper function for inserting catchpoints. */
765 insert_catchpoint (struct ui_out *uo, void *args)
767 struct breakpoint *b = (struct breakpoint *) args;
770 gdb_assert (b->type == bp_catchpoint);
771 gdb_assert (b->ops != NULL && b->ops->insert != NULL);
777 is_hardware_watchpoint (struct breakpoint *bpt)
779 return (bpt->type == bp_hardware_watchpoint
780 || bpt->type == bp_read_watchpoint
781 || bpt->type == bp_access_watchpoint);
784 /* Find the current value of a watchpoint on EXP. Return the value in
785 *VALP and *RESULTP and the chain of intermediate and final values
786 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
789 If a memory error occurs while evaluating the expression, *RESULTP will
790 be set to NULL. *RESULTP may be a lazy value, if the result could
791 not be read from memory. It is used to determine whether a value
792 is user-specified (we should watch the whole value) or intermediate
793 (we should watch only the bit used to locate the final value).
795 If the final value, or any intermediate value, could not be read
796 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
797 set to any referenced values. *VALP will never be a lazy value.
798 This is the value which we store in struct breakpoint.
800 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
801 value chain. The caller must free the values individually. If
802 VAL_CHAIN is NULL, all generated values will be left on the value
806 fetch_watchpoint_value (struct expression *exp, struct value **valp,
807 struct value **resultp, struct value **val_chain)
809 struct value *mark, *new_mark, *result;
810 volatile struct gdb_exception ex;
818 /* Evaluate the expression. */
819 mark = value_mark ();
822 TRY_CATCH (ex, RETURN_MASK_ALL)
824 result = evaluate_expression (exp);
828 /* Ignore memory errors, we want watchpoints pointing at
829 inaccessible memory to still be created; otherwise, throw the
830 error to some higher catcher. */
836 throw_exception (ex);
841 new_mark = value_mark ();
842 if (mark == new_mark)
847 /* Make sure it's not lazy, so that after the target stops again we
848 have a non-lazy previous value to compare with. */
850 && (!value_lazy (result) || gdb_value_fetch_lazy (result)))
855 /* Return the chain of intermediate values. We use this to
856 decide which addresses to watch. */
857 *val_chain = new_mark;
858 value_release_to_mark (mark);
862 /* Assuming that B is a watchpoint:
863 - Reparse watchpoint expression, if REPARSE is non-zero
864 - Evaluate expression and store the result in B->val
865 - Evaluate the condition if there is one, and store the result
867 - Update the list of values that must be watched in B->loc.
869 If the watchpoint disposition is disp_del_at_next_stop, then do nothing.
870 If this is local watchpoint that is out of scope, delete it. */
872 update_watchpoint (struct breakpoint *b, int reparse)
874 int within_current_scope;
875 struct frame_id saved_frame_id;
876 struct bp_location *loc;
879 /* We don't free locations. They are stored in bp_location_chain and
880 update_global_locations will eventually delete them and remove
881 breakpoints if needed. */
884 if (b->disposition == disp_del_at_next_stop)
887 /* Save the current frame's ID so we can restore it after
888 evaluating the watchpoint expression on its own frame. */
889 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
890 took a frame parameter, so that we didn't have to change the
892 saved_frame_id = get_frame_id (get_selected_frame (NULL));
894 /* Determine if the watchpoint is within scope. */
895 if (b->exp_valid_block == NULL)
896 within_current_scope = 1;
899 struct frame_info *fi;
900 fi = frame_find_by_id (b->watchpoint_frame);
901 within_current_scope = (fi != NULL);
902 if (within_current_scope)
906 if (within_current_scope && reparse)
915 b->exp = parse_exp_1 (&s, b->exp_valid_block, 0);
916 /* If the meaning of expression itself changed, the old value is
917 no longer relevant. We don't want to report a watchpoint hit
918 to the user when the old value and the new value may actually
919 be completely different objects. */
925 /* If we failed to parse the expression, for example because
926 it refers to a global variable in a not-yet-loaded shared library,
927 don't try to insert watchpoint. We don't automatically delete
928 such watchpoint, though, since failure to parse expression
929 is different from out-of-scope watchpoint. */
930 if (within_current_scope && b->exp)
932 struct value *val_chain, *v, *result, *next;
934 fetch_watchpoint_value (b->exp, &v, &result, &val_chain);
936 /* Avoid setting b->val if it's already set. The meaning of
937 b->val is 'the last value' user saw, and we should update
938 it only if we reported that last value to user. As it
939 happens, the code that reports it updates b->val directly. */
946 /* Change the type of breakpoint between hardware assisted or an
947 ordinary watchpoint depending on the hardware support and free
948 hardware slots. REPARSE is set when the inferior is started. */
949 if ((b->type == bp_watchpoint || b->type == bp_hardware_watchpoint)
952 int i, mem_cnt, other_type_used;
954 i = hw_watchpoint_used_count (bp_hardware_watchpoint,
956 mem_cnt = can_use_hardware_watchpoint (val_chain);
959 b->type = bp_watchpoint;
962 int target_resources_ok = target_can_use_hardware_watchpoint
963 (bp_hardware_watchpoint, i + mem_cnt, other_type_used);
964 if (target_resources_ok <= 0)
965 b->type = bp_watchpoint;
967 b->type = bp_hardware_watchpoint;
971 /* Look at each value on the value chain. */
972 for (v = val_chain; v; v = next)
974 /* If it's a memory location, and GDB actually needed
975 its contents to evaluate the expression, then we
976 must watch it. If the first value returned is
977 still lazy, that means an error occurred reading it;
978 watch it anyway in case it becomes readable. */
979 if (VALUE_LVAL (v) == lval_memory
980 && (v == val_chain || ! value_lazy (v)))
982 struct type *vtype = check_typedef (value_type (v));
984 /* We only watch structs and arrays if user asked
985 for it explicitly, never if they just happen to
986 appear in the middle of some value chain. */
988 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
989 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
993 struct bp_location *loc, **tmp;
995 addr = VALUE_ADDRESS (v) + value_offset (v);
996 len = TYPE_LENGTH (value_type (v));
998 if (b->type == bp_read_watchpoint)
1000 else if (b->type == bp_access_watchpoint)
1003 loc = allocate_bp_location (b);
1004 for (tmp = &(b->loc); *tmp != NULL; tmp = &((*tmp)->next))
1007 loc->address = addr;
1009 loc->watchpoint_type = type;
1013 next = value_next (v);
1018 /* We just regenerated the list of breakpoint locations.
1019 The new location does not have its condition field set to anything
1020 and therefore, we must always reparse the cond_string, independently
1021 of the value of the reparse flag. */
1022 if (b->cond_string != NULL)
1024 char *s = b->cond_string;
1025 b->loc->cond = parse_exp_1 (&s, b->exp_valid_block, 0);
1028 else if (!within_current_scope)
1030 printf_filtered (_("\
1031 Watchpoint %d deleted because the program has left the block \n\
1032 in which its expression is valid.\n"),
1034 if (b->related_breakpoint)
1035 b->related_breakpoint->disposition = disp_del_at_next_stop;
1036 b->disposition = disp_del_at_next_stop;
1039 /* Restore the selected frame. */
1040 select_frame (frame_find_by_id (saved_frame_id));
1044 /* Returns 1 iff breakpoint location should be
1045 inserted in the inferior. */
1047 should_be_inserted (struct bp_location *bpt)
1049 if (!breakpoint_enabled (bpt->owner))
1052 if (bpt->owner->disposition == disp_del_at_next_stop)
1055 if (!bpt->enabled || bpt->shlib_disabled || bpt->duplicate)
1058 /* Tracepoints are inserted by the target at a time of its choosing,
1060 if (bpt->owner->type == bp_tracepoint)
1066 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1067 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1068 and HW_BREAKPOINT_ERROR are used to report problems.
1070 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1071 method for each breakpoint or catchpoint type. */
1073 insert_bp_location (struct bp_location *bpt,
1074 struct ui_file *tmp_error_stream,
1075 int *disabled_breaks,
1076 int *hw_breakpoint_error)
1080 if (!should_be_inserted (bpt) || bpt->inserted)
1083 /* Initialize the target-specific information. */
1084 memset (&bpt->target_info, 0, sizeof (bpt->target_info));
1085 bpt->target_info.placed_address = bpt->address;
1087 if (bpt->loc_type == bp_loc_software_breakpoint
1088 || bpt->loc_type == bp_loc_hardware_breakpoint)
1090 if (bpt->owner->type != bp_hardware_breakpoint)
1092 /* If the explicitly specified breakpoint type
1093 is not hardware breakpoint, check the memory map to see
1094 if the breakpoint address is in read only memory or not.
1095 Two important cases are:
1096 - location type is not hardware breakpoint, memory
1097 is readonly. We change the type of the location to
1098 hardware breakpoint.
1099 - location type is hardware breakpoint, memory is read-write.
1100 This means we've previously made the location hardware one, but
1101 then the memory map changed, so we undo.
1103 When breakpoints are removed, remove_breakpoints will
1104 use location types we've just set here, the only possible
1105 problem is that memory map has changed during running program,
1106 but it's not going to work anyway with current gdb. */
1107 struct mem_region *mr
1108 = lookup_mem_region (bpt->target_info.placed_address);
1112 if (automatic_hardware_breakpoints)
1115 enum bp_loc_type new_type;
1117 if (mr->attrib.mode != MEM_RW)
1118 new_type = bp_loc_hardware_breakpoint;
1120 new_type = bp_loc_software_breakpoint;
1122 if (new_type != bpt->loc_type)
1124 static int said = 0;
1125 bpt->loc_type = new_type;
1128 fprintf_filtered (gdb_stdout, _("\
1129 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1134 else if (bpt->loc_type == bp_loc_software_breakpoint
1135 && mr->attrib.mode != MEM_RW)
1136 warning (_("cannot set software breakpoint at readonly address %s"),
1137 paddr (bpt->address));
1141 /* First check to see if we have to handle an overlay. */
1142 if (overlay_debugging == ovly_off
1143 || bpt->section == NULL
1144 || !(section_is_overlay (bpt->section)))
1146 /* No overlay handling: just set the breakpoint. */
1148 if (bpt->loc_type == bp_loc_hardware_breakpoint)
1149 val = target_insert_hw_breakpoint (&bpt->target_info);
1151 val = target_insert_breakpoint (&bpt->target_info);
1155 /* This breakpoint is in an overlay section.
1156 Shall we set a breakpoint at the LMA? */
1157 if (!overlay_events_enabled)
1159 /* Yes -- overlay event support is not active,
1160 so we must try to set a breakpoint at the LMA.
1161 This will not work for a hardware breakpoint. */
1162 if (bpt->loc_type == bp_loc_hardware_breakpoint)
1163 warning (_("hardware breakpoint %d not supported in overlay!"),
1164 bpt->owner->number);
1167 CORE_ADDR addr = overlay_unmapped_address (bpt->address,
1169 /* Set a software (trap) breakpoint at the LMA. */
1170 bpt->overlay_target_info = bpt->target_info;
1171 bpt->overlay_target_info.placed_address = addr;
1172 val = target_insert_breakpoint (&bpt->overlay_target_info);
1174 fprintf_unfiltered (tmp_error_stream,
1175 "Overlay breakpoint %d failed: in ROM?\n",
1176 bpt->owner->number);
1179 /* Shall we set a breakpoint at the VMA? */
1180 if (section_is_mapped (bpt->section))
1182 /* Yes. This overlay section is mapped into memory. */
1183 if (bpt->loc_type == bp_loc_hardware_breakpoint)
1184 val = target_insert_hw_breakpoint (&bpt->target_info);
1186 val = target_insert_breakpoint (&bpt->target_info);
1190 /* No. This breakpoint will not be inserted.
1191 No error, but do not mark the bp as 'inserted'. */
1198 /* Can't set the breakpoint. */
1199 if (solib_name_from_address (bpt->address))
1201 /* See also: disable_breakpoints_in_shlibs. */
1203 bpt->shlib_disabled = 1;
1204 if (!*disabled_breaks)
1206 fprintf_unfiltered (tmp_error_stream,
1207 "Cannot insert breakpoint %d.\n",
1208 bpt->owner->number);
1209 fprintf_unfiltered (tmp_error_stream,
1210 "Temporarily disabling shared library breakpoints:\n");
1212 *disabled_breaks = 1;
1213 fprintf_unfiltered (tmp_error_stream,
1214 "breakpoint #%d\n", bpt->owner->number);
1218 if (bpt->loc_type == bp_loc_hardware_breakpoint)
1220 *hw_breakpoint_error = 1;
1221 fprintf_unfiltered (tmp_error_stream,
1222 "Cannot insert hardware breakpoint %d.\n",
1223 bpt->owner->number);
1227 fprintf_unfiltered (tmp_error_stream,
1228 "Cannot insert breakpoint %d.\n",
1229 bpt->owner->number);
1230 fprintf_filtered (tmp_error_stream,
1231 "Error accessing memory address ");
1232 fputs_filtered (paddress (bpt->address), tmp_error_stream);
1233 fprintf_filtered (tmp_error_stream, ": %s.\n",
1234 safe_strerror (val));
1245 else if (bpt->loc_type == bp_loc_hardware_watchpoint
1246 /* NOTE drow/2003-09-08: This state only exists for removing
1247 watchpoints. It's not clear that it's necessary... */
1248 && bpt->owner->disposition != disp_del_at_next_stop)
1250 val = target_insert_watchpoint (bpt->address,
1252 bpt->watchpoint_type);
1253 bpt->inserted = (val != -1);
1256 else if (bpt->owner->type == bp_catchpoint)
1258 struct gdb_exception e = catch_exception (uiout, insert_catchpoint,
1259 bpt->owner, RETURN_MASK_ERROR);
1260 exception_fprintf (gdb_stderr, e, "warning: inserting catchpoint %d: ",
1261 bpt->owner->number);
1263 bpt->owner->enable_state = bp_disabled;
1267 /* We've already printed an error message if there was a problem
1268 inserting this catchpoint, and we've disabled the catchpoint,
1269 so just return success. */
1276 /* Make sure all breakpoints are inserted in inferior.
1277 Throws exception on any error.
1278 A breakpoint that is already inserted won't be inserted
1279 again, so calling this function twice is safe. */
1281 insert_breakpoints (void)
1283 struct breakpoint *bpt;
1285 ALL_BREAKPOINTS (bpt)
1286 if (is_hardware_watchpoint (bpt))
1287 update_watchpoint (bpt, 0 /* don't reparse. */);
1289 update_global_location_list (1);
1291 if (!breakpoints_always_inserted_mode ()
1292 && (target_has_execution
1293 || gdbarch_has_global_breakpoints (target_gdbarch)))
1294 /* update_global_location_list does not insert breakpoints
1295 when always_inserted_mode is not enabled. Explicitly
1297 insert_breakpoint_locations ();
1300 /* insert_breakpoints is used when starting or continuing the program.
1301 remove_breakpoints is used when the program stops.
1302 Both return zero if successful,
1303 or an `errno' value if could not write the inferior. */
1306 insert_breakpoint_locations (void)
1308 struct breakpoint *bpt;
1309 struct bp_location *b, *temp;
1312 int disabled_breaks = 0;
1313 int hw_breakpoint_error = 0;
1315 struct ui_file *tmp_error_stream = mem_fileopen ();
1316 struct cleanup *cleanups = make_cleanup_ui_file_delete (tmp_error_stream);
1318 /* Explicitly mark the warning -- this will only be printed if
1319 there was an error. */
1320 fprintf_unfiltered (tmp_error_stream, "Warning:\n");
1322 ALL_BP_LOCATIONS_SAFE (b, temp)
1324 if (!should_be_inserted (b) || b->inserted)
1327 /* There is no point inserting thread-specific breakpoints if the
1328 thread no longer exists. */
1329 if (b->owner->thread != -1
1330 && !valid_thread_id (b->owner->thread))
1333 val = insert_bp_location (b, tmp_error_stream,
1335 &hw_breakpoint_error);
1340 /* If we failed to insert all locations of a watchpoint,
1341 remove them, as half-inserted watchpoint is of limited use. */
1342 ALL_BREAKPOINTS (bpt)
1344 int some_failed = 0;
1345 struct bp_location *loc;
1347 if (!is_hardware_watchpoint (bpt))
1350 if (!breakpoint_enabled (bpt))
1353 if (bpt->disposition == disp_del_at_next_stop)
1356 for (loc = bpt->loc; loc; loc = loc->next)
1364 for (loc = bpt->loc; loc; loc = loc->next)
1366 remove_breakpoint (loc, mark_uninserted);
1368 hw_breakpoint_error = 1;
1369 fprintf_unfiltered (tmp_error_stream,
1370 "Could not insert hardware watchpoint %d.\n",
1378 /* If a hardware breakpoint or watchpoint was inserted, add a
1379 message about possibly exhausted resources. */
1380 if (hw_breakpoint_error)
1382 fprintf_unfiltered (tmp_error_stream,
1383 "Could not insert hardware breakpoints:\n\
1384 You may have requested too many hardware breakpoints/watchpoints.\n");
1386 target_terminal_ours_for_output ();
1387 error_stream (tmp_error_stream);
1390 do_cleanups (cleanups);
1394 remove_breakpoints (void)
1396 struct bp_location *b;
1399 ALL_BP_LOCATIONS (b)
1403 val = remove_breakpoint (b, mark_uninserted);
1412 remove_hw_watchpoints (void)
1414 struct bp_location *b;
1417 ALL_BP_LOCATIONS (b)
1419 if (b->inserted && b->loc_type == bp_loc_hardware_watchpoint)
1421 val = remove_breakpoint (b, mark_uninserted);
1430 reattach_breakpoints (int pid)
1432 struct bp_location *b;
1434 struct cleanup *old_chain = save_inferior_ptid ();
1435 struct ui_file *tmp_error_stream = mem_fileopen ();
1436 int dummy1 = 0, dummy2 = 0;
1438 make_cleanup_ui_file_delete (tmp_error_stream);
1440 inferior_ptid = pid_to_ptid (pid);
1441 ALL_BP_LOCATIONS (b)
1446 val = insert_bp_location (b, tmp_error_stream,
1450 do_cleanups (old_chain);
1455 do_cleanups (old_chain);
1459 static struct breakpoint *
1460 create_internal_breakpoint (CORE_ADDR address, enum bptype type)
1462 static int internal_breakpoint_number = -1;
1463 struct symtab_and_line sal;
1464 struct breakpoint *b;
1466 init_sal (&sal); /* initialize to zeroes */
1469 sal.section = find_pc_overlay (sal.pc);
1471 b = set_raw_breakpoint (sal, type);
1472 b->number = internal_breakpoint_number--;
1473 b->disposition = disp_donttouch;
1479 create_overlay_event_breakpoint (char *func_name, struct objfile *objfile)
1481 struct breakpoint *b;
1482 struct minimal_symbol *m;
1484 if ((m = lookup_minimal_symbol_text (func_name, objfile)) == NULL)
1487 b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m),
1489 b->addr_string = xstrdup (func_name);
1491 if (overlay_debugging == ovly_auto)
1493 b->enable_state = bp_enabled;
1494 overlay_events_enabled = 1;
1498 b->enable_state = bp_disabled;
1499 overlay_events_enabled = 0;
1501 update_global_location_list (1);
1505 update_breakpoints_after_exec (void)
1507 struct breakpoint *b;
1508 struct breakpoint *temp;
1509 struct bp_location *bploc;
1510 struct objfile *objfile;
1512 /* We're about to delete breakpoints from GDB's lists. If the
1513 INSERTED flag is true, GDB will try to lift the breakpoints by
1514 writing the breakpoints' "shadow contents" back into memory. The
1515 "shadow contents" are NOT valid after an exec, so GDB should not
1516 do that. Instead, the target is responsible from marking
1517 breakpoints out as soon as it detects an exec. We don't do that
1518 here instead, because there may be other attempts to delete
1519 breakpoints after detecting an exec and before reaching here. */
1520 ALL_BP_LOCATIONS (bploc)
1521 gdb_assert (!bploc->inserted);
1523 ALL_BREAKPOINTS_SAFE (b, temp)
1525 /* Solib breakpoints must be explicitly reset after an exec(). */
1526 if (b->type == bp_shlib_event)
1528 delete_breakpoint (b);
1532 /* Thread event breakpoints must be set anew after an exec(),
1533 as must overlay event breakpoints. */
1534 if (b->type == bp_thread_event || b->type == bp_overlay_event)
1536 delete_breakpoint (b);
1540 /* Step-resume breakpoints are meaningless after an exec(). */
1541 if (b->type == bp_step_resume)
1543 delete_breakpoint (b);
1547 /* Longjmp and longjmp-resume breakpoints are also meaningless
1549 if (b->type == bp_longjmp || b->type == bp_longjmp_resume)
1551 delete_breakpoint (b);
1555 if (b->type == bp_catchpoint)
1557 /* For now, none of the bp_catchpoint breakpoints need to
1558 do anything at this point. In the future, if some of
1559 the catchpoints need to something, we will need to add
1560 a new method, and call this method from here. */
1564 /* bp_finish is a special case. The only way we ought to be able
1565 to see one of these when an exec() has happened, is if the user
1566 caught a vfork, and then said "finish". Ordinarily a finish just
1567 carries them to the call-site of the current callee, by setting
1568 a temporary bp there and resuming. But in this case, the finish
1569 will carry them entirely through the vfork & exec.
1571 We don't want to allow a bp_finish to remain inserted now. But
1572 we can't safely delete it, 'cause finish_command has a handle to
1573 the bp on a bpstat, and will later want to delete it. There's a
1574 chance (and I've seen it happen) that if we delete the bp_finish
1575 here, that its storage will get reused by the time finish_command
1576 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1577 We really must allow finish_command to delete a bp_finish.
1579 In the absense of a general solution for the "how do we know
1580 it's safe to delete something others may have handles to?"
1581 problem, what we'll do here is just uninsert the bp_finish, and
1582 let finish_command delete it.
1584 (We know the bp_finish is "doomed" in the sense that it's
1585 momentary, and will be deleted as soon as finish_command sees
1586 the inferior stopped. So it doesn't matter that the bp's
1587 address is probably bogus in the new a.out, unlike e.g., the
1588 solib breakpoints.) */
1590 if (b->type == bp_finish)
1595 /* Without a symbolic address, we have little hope of the
1596 pre-exec() address meaning the same thing in the post-exec()
1598 if (b->addr_string == NULL)
1600 delete_breakpoint (b);
1604 /* FIXME what about longjmp breakpoints? Re-create them here? */
1605 ALL_OBJFILES (objfile)
1606 create_overlay_event_breakpoint ("_ovly_debug_event", objfile);
1610 detach_breakpoints (int pid)
1612 struct bp_location *b;
1614 struct cleanup *old_chain = save_inferior_ptid ();
1616 if (pid == PIDGET (inferior_ptid))
1617 error (_("Cannot detach breakpoints of inferior_ptid"));
1619 /* Set inferior_ptid; remove_breakpoint uses this global. */
1620 inferior_ptid = pid_to_ptid (pid);
1621 ALL_BP_LOCATIONS (b)
1625 val = remove_breakpoint (b, mark_inserted);
1628 do_cleanups (old_chain);
1633 do_cleanups (old_chain);
1638 remove_breakpoint (struct bp_location *b, insertion_state_t is)
1642 if (b->owner->enable_state == bp_permanent)
1643 /* Permanent breakpoints cannot be inserted or removed. */
1646 /* The type of none suggests that owner is actually deleted.
1647 This should not ever happen. */
1648 gdb_assert (b->owner->type != bp_none);
1650 if (b->loc_type == bp_loc_software_breakpoint
1651 || b->loc_type == bp_loc_hardware_breakpoint)
1653 /* "Normal" instruction breakpoint: either the standard
1654 trap-instruction bp (bp_breakpoint), or a
1655 bp_hardware_breakpoint. */
1657 /* First check to see if we have to handle an overlay. */
1658 if (overlay_debugging == ovly_off
1659 || b->section == NULL
1660 || !(section_is_overlay (b->section)))
1662 /* No overlay handling: just remove the breakpoint. */
1664 if (b->loc_type == bp_loc_hardware_breakpoint)
1665 val = target_remove_hw_breakpoint (&b->target_info);
1667 val = target_remove_breakpoint (&b->target_info);
1671 /* This breakpoint is in an overlay section.
1672 Did we set a breakpoint at the LMA? */
1673 if (!overlay_events_enabled)
1675 /* Yes -- overlay event support is not active, so we
1676 should have set a breakpoint at the LMA. Remove it.
1678 /* Ignore any failures: if the LMA is in ROM, we will
1679 have already warned when we failed to insert it. */
1680 if (b->loc_type == bp_loc_hardware_breakpoint)
1681 target_remove_hw_breakpoint (&b->overlay_target_info);
1683 target_remove_breakpoint (&b->overlay_target_info);
1685 /* Did we set a breakpoint at the VMA?
1686 If so, we will have marked the breakpoint 'inserted'. */
1689 /* Yes -- remove it. Previously we did not bother to
1690 remove the breakpoint if the section had been
1691 unmapped, but let's not rely on that being safe. We
1692 don't know what the overlay manager might do. */
1693 if (b->loc_type == bp_loc_hardware_breakpoint)
1694 val = target_remove_hw_breakpoint (&b->target_info);
1696 /* However, we should remove *software* breakpoints only
1697 if the section is still mapped, or else we overwrite
1698 wrong code with the saved shadow contents. */
1699 else if (section_is_mapped (b->section))
1700 val = target_remove_breakpoint (&b->target_info);
1706 /* No -- not inserted, so no need to remove. No error. */
1711 /* In some cases, we might not be able to remove a breakpoint
1712 in a shared library that has already been removed, but we
1713 have not yet processed the shlib unload event. */
1714 if (val && solib_name_from_address (b->address))
1719 b->inserted = (is == mark_inserted);
1721 else if (b->loc_type == bp_loc_hardware_watchpoint)
1726 b->inserted = (is == mark_inserted);
1727 val = target_remove_watchpoint (b->address, b->length,
1728 b->watchpoint_type);
1730 /* Failure to remove any of the hardware watchpoints comes here. */
1731 if ((is == mark_uninserted) && (b->inserted))
1732 warning (_("Could not remove hardware watchpoint %d."),
1735 else if (b->owner->type == bp_catchpoint
1736 && breakpoint_enabled (b->owner)
1739 gdb_assert (b->owner->ops != NULL && b->owner->ops->remove != NULL);
1741 val = b->owner->ops->remove (b->owner);
1744 b->inserted = (is == mark_inserted);
1750 /* Clear the "inserted" flag in all breakpoints. */
1753 mark_breakpoints_out (void)
1755 struct bp_location *bpt;
1757 ALL_BP_LOCATIONS (bpt)
1761 /* Clear the "inserted" flag in all breakpoints and delete any
1762 breakpoints which should go away between runs of the program.
1764 Plus other such housekeeping that has to be done for breakpoints
1767 Note: this function gets called at the end of a run (by
1768 generic_mourn_inferior) and when a run begins (by
1769 init_wait_for_inferior). */
1774 breakpoint_init_inferior (enum inf_context context)
1776 struct breakpoint *b, *temp;
1777 struct bp_location *bpt;
1780 /* If breakpoint locations are shared across processes, then there's
1782 if (gdbarch_has_global_breakpoints (target_gdbarch))
1785 ALL_BP_LOCATIONS (bpt)
1786 if (bpt->owner->enable_state != bp_permanent)
1789 ALL_BREAKPOINTS_SAFE (b, temp)
1794 case bp_watchpoint_scope:
1796 /* If the call dummy breakpoint is at the entry point it will
1797 cause problems when the inferior is rerun, so we better
1800 Also get rid of scope breakpoints. */
1801 delete_breakpoint (b);
1805 case bp_hardware_watchpoint:
1806 case bp_read_watchpoint:
1807 case bp_access_watchpoint:
1809 /* Likewise for watchpoints on local expressions. */
1810 if (b->exp_valid_block != NULL)
1811 delete_breakpoint (b);
1812 else if (context == inf_starting)
1814 /* Reset val field to force reread of starting value
1815 in insert_breakpoints. */
1817 value_free (b->val);
1827 /* Get rid of the moribund locations. */
1828 for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, bpt); ++ix)
1829 free_bp_location (bpt);
1830 VEC_free (bp_location_p, moribund_locations);
1833 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1834 exists at PC. It returns ordinary_breakpoint_here if it's an
1835 ordinary breakpoint, or permanent_breakpoint_here if it's a
1836 permanent breakpoint.
1837 - When continuing from a location with an ordinary breakpoint, we
1838 actually single step once before calling insert_breakpoints.
1839 - When continuing from a localion with a permanent breakpoint, we
1840 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1841 the target, to advance the PC past the breakpoint. */
1843 enum breakpoint_here
1844 breakpoint_here_p (CORE_ADDR pc)
1846 const struct bp_location *bpt;
1847 int any_breakpoint_here = 0;
1849 ALL_BP_LOCATIONS (bpt)
1851 if (bpt->loc_type != bp_loc_software_breakpoint
1852 && bpt->loc_type != bp_loc_hardware_breakpoint)
1855 if ((breakpoint_enabled (bpt->owner)
1856 || bpt->owner->enable_state == bp_permanent)
1857 && bpt->address == pc) /* bp is enabled and matches pc */
1859 if (overlay_debugging
1860 && section_is_overlay (bpt->section)
1861 && !section_is_mapped (bpt->section))
1862 continue; /* unmapped overlay -- can't be a match */
1863 else if (bpt->owner->enable_state == bp_permanent)
1864 return permanent_breakpoint_here;
1866 any_breakpoint_here = 1;
1870 return any_breakpoint_here ? ordinary_breakpoint_here : 0;
1873 /* Return true if there's a moribund breakpoint at PC. */
1876 moribund_breakpoint_here_p (CORE_ADDR pc)
1878 struct bp_location *loc;
1881 for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix)
1882 if (loc->address == pc)
1888 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1889 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1890 This does not check for single-step breakpoints, which are
1891 inserted and removed using direct target manipulation. */
1894 regular_breakpoint_inserted_here_p (CORE_ADDR pc)
1896 const struct bp_location *bpt;
1898 ALL_BP_LOCATIONS (bpt)
1900 if (bpt->loc_type != bp_loc_software_breakpoint
1901 && bpt->loc_type != bp_loc_hardware_breakpoint)
1905 && bpt->address == pc) /* bp is inserted and matches pc */
1907 if (overlay_debugging
1908 && section_is_overlay (bpt->section)
1909 && !section_is_mapped (bpt->section))
1910 continue; /* unmapped overlay -- can't be a match */
1918 /* Returns non-zero iff there's either regular breakpoint
1919 or a single step breakpoint inserted at PC. */
1922 breakpoint_inserted_here_p (CORE_ADDR pc)
1924 if (regular_breakpoint_inserted_here_p (pc))
1927 if (single_step_breakpoint_inserted_here_p (pc))
1933 /* This function returns non-zero iff there is a software breakpoint
1937 software_breakpoint_inserted_here_p (CORE_ADDR pc)
1939 const struct bp_location *bpt;
1940 int any_breakpoint_here = 0;
1942 ALL_BP_LOCATIONS (bpt)
1944 if (bpt->loc_type != bp_loc_software_breakpoint)
1948 && bpt->address == pc) /* bp is enabled and matches pc */
1950 if (overlay_debugging
1951 && section_is_overlay (bpt->section)
1952 && !section_is_mapped (bpt->section))
1953 continue; /* unmapped overlay -- can't be a match */
1959 /* Also check for software single-step breakpoints. */
1960 if (single_step_breakpoint_inserted_here_p (pc))
1966 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1967 PC is valid for process/thread PTID. */
1970 breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid)
1972 const struct bp_location *bpt;
1973 /* The thread and task IDs associated to PTID, computed lazily. */
1977 ALL_BP_LOCATIONS (bpt)
1979 if (bpt->loc_type != bp_loc_software_breakpoint
1980 && bpt->loc_type != bp_loc_hardware_breakpoint)
1983 if (!breakpoint_enabled (bpt->owner)
1984 && bpt->owner->enable_state != bp_permanent)
1987 if (bpt->address != pc)
1990 if (bpt->owner->thread != -1)
1992 /* This is a thread-specific breakpoint. Check that ptid
1993 matches that thread. If thread hasn't been computed yet,
1994 it is now time to do so. */
1996 thread = pid_to_thread_id (ptid);
1997 if (bpt->owner->thread != thread)
2001 if (bpt->owner->task != 0)
2003 /* This is a task-specific breakpoint. Check that ptid
2004 matches that task. If task hasn't been computed yet,
2005 it is now time to do so. */
2007 task = ada_get_task_number (ptid);
2008 if (bpt->owner->task != task)
2012 if (overlay_debugging
2013 && section_is_overlay (bpt->section)
2014 && !section_is_mapped (bpt->section))
2015 continue; /* unmapped overlay -- can't be a match */
2024 /* bpstat stuff. External routines' interfaces are documented
2028 ep_is_catchpoint (struct breakpoint *ep)
2030 return (ep->type == bp_catchpoint);
2034 bpstat_free (bpstat bs)
2036 if (bs->old_val != NULL)
2037 value_free (bs->old_val);
2038 free_command_lines (&bs->commands);
2042 /* Clear a bpstat so that it says we are not at any breakpoint.
2043 Also free any storage that is part of a bpstat. */
2046 bpstat_clear (bpstat *bsp)
2063 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
2064 is part of the bpstat is copied as well. */
2067 bpstat_copy (bpstat bs)
2071 bpstat retval = NULL;
2076 for (; bs != NULL; bs = bs->next)
2078 tmp = (bpstat) xmalloc (sizeof (*tmp));
2079 memcpy (tmp, bs, sizeof (*tmp));
2080 if (bs->commands != NULL)
2081 tmp->commands = copy_command_lines (bs->commands);
2082 if (bs->old_val != NULL)
2084 tmp->old_val = value_copy (bs->old_val);
2085 release_value (tmp->old_val);
2089 /* This is the first thing in the chain. */
2099 /* Find the bpstat associated with this breakpoint */
2102 bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
2107 for (; bsp != NULL; bsp = bsp->next)
2109 if (bsp->breakpoint_at && bsp->breakpoint_at->owner == breakpoint)
2115 /* Find a step_resume breakpoint associated with this bpstat.
2116 (If there are multiple step_resume bp's on the list, this function
2117 will arbitrarily pick one.)
2119 It is an error to use this function if BPSTAT doesn't contain a
2120 step_resume breakpoint.
2122 See wait_for_inferior's use of this function. */
2124 bpstat_find_step_resume_breakpoint (bpstat bsp)
2128 gdb_assert (bsp != NULL);
2130 current_thread = pid_to_thread_id (inferior_ptid);
2132 for (; bsp != NULL; bsp = bsp->next)
2134 if ((bsp->breakpoint_at != NULL) &&
2135 (bsp->breakpoint_at->owner->type == bp_step_resume) &&
2136 (bsp->breakpoint_at->owner->thread == current_thread ||
2137 bsp->breakpoint_at->owner->thread == -1))
2138 return bsp->breakpoint_at->owner;
2141 internal_error (__FILE__, __LINE__, _("No step_resume breakpoint found."));
2145 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2146 at. *BSP upon return is a bpstat which points to the remaining
2147 breakpoints stopped at (but which is not guaranteed to be good for
2148 anything but further calls to bpstat_num).
2149 Return 0 if passed a bpstat which does not indicate any breakpoints.
2150 Return -1 if stopped at a breakpoint that has been deleted since
2152 Return 1 otherwise. */
2155 bpstat_num (bpstat *bsp, int *num)
2157 struct breakpoint *b;
2160 return 0; /* No more breakpoint values */
2162 /* We assume we'll never have several bpstats that
2163 correspond to a single breakpoint -- otherwise,
2164 this function might return the same number more
2165 than once and this will look ugly. */
2166 b = (*bsp)->breakpoint_at ? (*bsp)->breakpoint_at->owner : NULL;
2167 *bsp = (*bsp)->next;
2169 return -1; /* breakpoint that's been deleted since */
2171 *num = b->number; /* We have its number */
2175 /* Modify BS so that the actions will not be performed. */
2178 bpstat_clear_actions (bpstat bs)
2180 for (; bs != NULL; bs = bs->next)
2182 free_command_lines (&bs->commands);
2183 if (bs->old_val != NULL)
2185 value_free (bs->old_val);
2191 /* Called when a command is about to proceed the inferior. */
2194 breakpoint_about_to_proceed (void)
2196 if (!ptid_equal (inferior_ptid, null_ptid))
2198 struct thread_info *tp = inferior_thread ();
2200 /* Allow inferior function calls in breakpoint commands to not
2201 interrupt the command list. When the call finishes
2202 successfully, the inferior will be standing at the same
2203 breakpoint as if nothing happened. */
2208 breakpoint_proceeded = 1;
2211 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2213 cleanup_executing_breakpoints (void *ignore)
2215 executing_breakpoint_commands = 0;
2218 /* Execute all the commands associated with all the breakpoints at this
2219 location. Any of these commands could cause the process to proceed
2220 beyond this point, etc. We look out for such changes by checking
2221 the global "breakpoint_proceeded" after each command.
2223 Returns true if a breakpoint command resumed the inferior. In that
2224 case, it is the caller's responsibility to recall it again with the
2225 bpstat of the current thread. */
2228 bpstat_do_actions_1 (bpstat *bsp)
2231 struct cleanup *old_chain;
2234 /* Avoid endless recursion if a `source' command is contained
2236 if (executing_breakpoint_commands)
2239 executing_breakpoint_commands = 1;
2240 old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
2242 /* This pointer will iterate over the list of bpstat's. */
2245 breakpoint_proceeded = 0;
2246 for (; bs != NULL; bs = bs->next)
2248 struct command_line *cmd;
2249 struct cleanup *this_cmd_tree_chain;
2251 /* Take ownership of the BSP's command tree, if it has one.
2253 The command tree could legitimately contain commands like
2254 'step' and 'next', which call clear_proceed_status, which
2255 frees stop_bpstat's command tree. To make sure this doesn't
2256 free the tree we're executing out from under us, we need to
2257 take ownership of the tree ourselves. Since a given bpstat's
2258 commands are only executed once, we don't need to copy it; we
2259 can clear the pointer in the bpstat, and make sure we free
2260 the tree when we're done. */
2263 this_cmd_tree_chain = make_cleanup_free_command_lines (&cmd);
2267 execute_control_command (cmd);
2269 if (breakpoint_proceeded)
2275 /* We can free this command tree now. */
2276 do_cleanups (this_cmd_tree_chain);
2278 if (breakpoint_proceeded)
2280 if (target_can_async_p ())
2281 /* If we are in async mode, then the target might be still
2282 running, not stopped at any breakpoint, so nothing for
2283 us to do here -- just return to the event loop. */
2286 /* In sync mode, when execute_control_command returns
2287 we're already standing on the next breakpoint.
2288 Breakpoint commands for that stop were not run, since
2289 execute_command does not run breakpoint commands --
2290 only command_line_handler does, but that one is not
2291 involved in execution of breakpoint commands. So, we
2292 can now execute breakpoint commands. It should be
2293 noted that making execute_command do bpstat actions is
2294 not an option -- in this case we'll have recursive
2295 invocation of bpstat for each breakpoint with a
2296 command, and can easily blow up GDB stack. Instead, we
2297 return true, which will trigger the caller to recall us
2298 with the new stop_bpstat. */
2303 do_cleanups (old_chain);
2308 bpstat_do_actions (void)
2310 /* Do any commands attached to breakpoint we are stopped at. */
2311 while (!ptid_equal (inferior_ptid, null_ptid)
2312 && target_has_execution
2313 && !is_exited (inferior_ptid)
2314 && !is_executing (inferior_ptid))
2315 /* Since in sync mode, bpstat_do_actions may resume the inferior,
2316 and only return when it is stopped at the next breakpoint, we
2317 keep doing breakpoint actions until it returns false to
2318 indicate the inferior was not resumed. */
2319 if (!bpstat_do_actions_1 (&inferior_thread ()->stop_bpstat))
2323 /* Print out the (old or new) value associated with a watchpoint. */
2326 watchpoint_value_print (struct value *val, struct ui_file *stream)
2329 fprintf_unfiltered (stream, _("<unreadable>"));
2332 struct value_print_options opts;
2333 get_user_print_options (&opts);
2334 value_print (val, stream, &opts);
2338 /* This is the normal print function for a bpstat. In the future,
2339 much of this logic could (should?) be moved to bpstat_stop_status,
2340 by having it set different print_it values.
2342 Current scheme: When we stop, bpstat_print() is called. It loops
2343 through the bpstat list of things causing this stop, calling the
2344 print_bp_stop_message function on each one. The behavior of the
2345 print_bp_stop_message function depends on the print_it field of
2346 bpstat. If such field so indicates, call this function here.
2348 Return values from this routine (ultimately used by bpstat_print()
2349 and normal_stop() to decide what to do):
2350 PRINT_NOTHING: Means we already printed all we needed to print,
2351 don't print anything else.
2352 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2353 that something to be followed by a location.
2354 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2355 that something to be followed by a location.
2356 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2359 static enum print_stop_action
2360 print_it_typical (bpstat bs)
2362 struct cleanup *old_chain;
2363 struct breakpoint *b;
2364 const struct bp_location *bl;
2365 struct ui_stream *stb;
2367 enum print_stop_action result;
2369 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2370 which has since been deleted. */
2371 if (bs->breakpoint_at == NULL)
2372 return PRINT_UNKNOWN;
2373 bl = bs->breakpoint_at;
2376 stb = ui_out_stream_new (uiout);
2377 old_chain = make_cleanup_ui_out_stream_delete (stb);
2382 case bp_hardware_breakpoint:
2383 bp_temp = bs->breakpoint_at->owner->disposition == disp_del;
2384 if (bl->address != bl->requested_address)
2385 breakpoint_adjustment_warning (bl->requested_address,
2388 annotate_breakpoint (b->number);
2390 ui_out_text (uiout, "\nTemporary breakpoint ");
2392 ui_out_text (uiout, "\nBreakpoint ");
2393 if (ui_out_is_mi_like_p (uiout))
2395 ui_out_field_string (uiout, "reason",
2396 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
2397 ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
2399 ui_out_field_int (uiout, "bkptno", b->number);
2400 ui_out_text (uiout, ", ");
2401 result = PRINT_SRC_AND_LOC;
2404 case bp_shlib_event:
2405 /* Did we stop because the user set the stop_on_solib_events
2406 variable? (If so, we report this as a generic, "Stopped due
2407 to shlib event" message.) */
2408 printf_filtered (_("Stopped due to shared library event\n"));
2409 result = PRINT_NOTHING;
2412 case bp_thread_event:
2413 /* Not sure how we will get here.
2414 GDB should not stop for these breakpoints. */
2415 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2416 result = PRINT_NOTHING;
2419 case bp_overlay_event:
2420 /* By analogy with the thread event, GDB should not stop for these. */
2421 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2422 result = PRINT_NOTHING;
2426 case bp_hardware_watchpoint:
2427 annotate_watchpoint (b->number);
2428 if (ui_out_is_mi_like_p (uiout))
2431 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER));
2433 make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2434 ui_out_text (uiout, "\nOld value = ");
2435 watchpoint_value_print (bs->old_val, stb->stream);
2436 ui_out_field_stream (uiout, "old", stb);
2437 ui_out_text (uiout, "\nNew value = ");
2438 watchpoint_value_print (b->val, stb->stream);
2439 ui_out_field_stream (uiout, "new", stb);
2440 ui_out_text (uiout, "\n");
2441 /* More than one watchpoint may have been triggered. */
2442 result = PRINT_UNKNOWN;
2445 case bp_read_watchpoint:
2446 if (ui_out_is_mi_like_p (uiout))
2449 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER));
2451 make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2452 ui_out_text (uiout, "\nValue = ");
2453 watchpoint_value_print (b->val, stb->stream);
2454 ui_out_field_stream (uiout, "value", stb);
2455 ui_out_text (uiout, "\n");
2456 result = PRINT_UNKNOWN;
2459 case bp_access_watchpoint:
2460 if (bs->old_val != NULL)
2462 annotate_watchpoint (b->number);
2463 if (ui_out_is_mi_like_p (uiout))
2466 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER));
2468 make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2469 ui_out_text (uiout, "\nOld value = ");
2470 watchpoint_value_print (bs->old_val, stb->stream);
2471 ui_out_field_stream (uiout, "old", stb);
2472 ui_out_text (uiout, "\nNew value = ");
2477 if (ui_out_is_mi_like_p (uiout))
2480 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER));
2481 make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2482 ui_out_text (uiout, "\nValue = ");
2484 watchpoint_value_print (b->val, stb->stream);
2485 ui_out_field_stream (uiout, "new", stb);
2486 ui_out_text (uiout, "\n");
2487 result = PRINT_UNKNOWN;
2490 /* Fall through, we don't deal with these types of breakpoints
2494 if (ui_out_is_mi_like_p (uiout))
2497 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED));
2498 result = PRINT_UNKNOWN;
2502 if (ui_out_is_mi_like_p (uiout))
2505 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED));
2506 result = PRINT_UNKNOWN;
2511 case bp_longjmp_resume:
2512 case bp_step_resume:
2513 case bp_watchpoint_scope:
2517 result = PRINT_UNKNOWN;
2521 do_cleanups (old_chain);
2525 /* Generic routine for printing messages indicating why we
2526 stopped. The behavior of this function depends on the value
2527 'print_it' in the bpstat structure. Under some circumstances we
2528 may decide not to print anything here and delegate the task to
2531 static enum print_stop_action
2532 print_bp_stop_message (bpstat bs)
2534 switch (bs->print_it)
2537 /* Nothing should be printed for this bpstat entry. */
2538 return PRINT_UNKNOWN;
2542 /* We still want to print the frame, but we already printed the
2543 relevant messages. */
2544 return PRINT_SRC_AND_LOC;
2547 case print_it_normal:
2549 const struct bp_location *bl = bs->breakpoint_at;
2550 struct breakpoint *b = bl ? bl->owner : NULL;
2552 /* Normal case. Call the breakpoint's print_it method, or
2553 print_it_typical. */
2554 /* FIXME: how breakpoint can ever be NULL here? */
2555 if (b != NULL && b->ops != NULL && b->ops->print_it != NULL)
2556 return b->ops->print_it (b);
2558 return print_it_typical (bs);
2563 internal_error (__FILE__, __LINE__,
2564 _("print_bp_stop_message: unrecognized enum value"));
2569 /* Print a message indicating what happened. This is called from
2570 normal_stop(). The input to this routine is the head of the bpstat
2571 list - a list of the eventpoints that caused this stop. This
2572 routine calls the generic print routine for printing a message
2573 about reasons for stopping. This will print (for example) the
2574 "Breakpoint n," part of the output. The return value of this
2577 PRINT_UNKNOWN: Means we printed nothing
2578 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2579 code to print the location. An example is
2580 "Breakpoint 1, " which should be followed by
2582 PRINT_SRC_ONLY: Means we printed something, but there is no need
2583 to also print the location part of the message.
2584 An example is the catch/throw messages, which
2585 don't require a location appended to the end.
2586 PRINT_NOTHING: We have done some printing and we don't need any
2587 further info to be printed.*/
2589 enum print_stop_action
2590 bpstat_print (bpstat bs)
2594 /* Maybe another breakpoint in the chain caused us to stop.
2595 (Currently all watchpoints go on the bpstat whether hit or not.
2596 That probably could (should) be changed, provided care is taken
2597 with respect to bpstat_explains_signal). */
2598 for (; bs; bs = bs->next)
2600 val = print_bp_stop_message (bs);
2601 if (val == PRINT_SRC_ONLY
2602 || val == PRINT_SRC_AND_LOC
2603 || val == PRINT_NOTHING)
2607 /* We reached the end of the chain, or we got a null BS to start
2608 with and nothing was printed. */
2609 return PRINT_UNKNOWN;
2612 /* Evaluate the expression EXP and return 1 if value is zero.
2613 This is used inside a catch_errors to evaluate the breakpoint condition.
2614 The argument is a "struct expression *" that has been cast to char * to
2615 make it pass through catch_errors. */
2618 breakpoint_cond_eval (void *exp)
2620 struct value *mark = value_mark ();
2621 int i = !value_true (evaluate_expression ((struct expression *) exp));
2622 value_free_to_mark (mark);
2626 /* Allocate a new bpstat and chain it to the current one. */
2629 bpstat_alloc (const struct bp_location *bl, bpstat cbs /* Current "bs" value */ )
2633 bs = (bpstat) xmalloc (sizeof (*bs));
2635 bs->breakpoint_at = bl;
2636 /* If the condition is false, etc., don't do the commands. */
2637 bs->commands = NULL;
2639 bs->print_it = print_it_normal;
2643 /* The target has stopped with waitstatus WS. Check if any hardware
2644 watchpoints have triggered, according to the target. */
2647 watchpoints_triggered (struct target_waitstatus *ws)
2649 int stopped_by_watchpoint = target_stopped_by_watchpoint ();
2651 struct breakpoint *b;
2653 if (!stopped_by_watchpoint)
2655 /* We were not stopped by a watchpoint. Mark all watchpoints
2656 as not triggered. */
2658 if (b->type == bp_hardware_watchpoint
2659 || b->type == bp_read_watchpoint
2660 || b->type == bp_access_watchpoint)
2661 b->watchpoint_triggered = watch_triggered_no;
2666 if (!target_stopped_data_address (¤t_target, &addr))
2668 /* We were stopped by a watchpoint, but we don't know where.
2669 Mark all watchpoints as unknown. */
2671 if (b->type == bp_hardware_watchpoint
2672 || b->type == bp_read_watchpoint
2673 || b->type == bp_access_watchpoint)
2674 b->watchpoint_triggered = watch_triggered_unknown;
2676 return stopped_by_watchpoint;
2679 /* The target could report the data address. Mark watchpoints
2680 affected by this data address as triggered, and all others as not
2684 if (b->type == bp_hardware_watchpoint
2685 || b->type == bp_read_watchpoint
2686 || b->type == bp_access_watchpoint)
2688 struct bp_location *loc;
2691 b->watchpoint_triggered = watch_triggered_no;
2692 for (loc = b->loc; loc; loc = loc->next)
2693 /* Exact match not required. Within range is
2695 if (target_watchpoint_addr_within_range (¤t_target,
2699 b->watchpoint_triggered = watch_triggered_yes;
2707 /* Possible return values for watchpoint_check (this can't be an enum
2708 because of check_errors). */
2709 /* The watchpoint has been deleted. */
2710 #define WP_DELETED 1
2711 /* The value has changed. */
2712 #define WP_VALUE_CHANGED 2
2713 /* The value has not changed. */
2714 #define WP_VALUE_NOT_CHANGED 3
2716 #define BP_TEMPFLAG 1
2717 #define BP_HARDWAREFLAG 2
2719 /* Check watchpoint condition. */
2722 watchpoint_check (void *p)
2724 bpstat bs = (bpstat) p;
2725 struct breakpoint *b;
2726 struct frame_info *fr;
2727 int within_current_scope;
2729 b = bs->breakpoint_at->owner;
2731 if (b->exp_valid_block == NULL)
2732 within_current_scope = 1;
2735 /* There is no current frame at this moment. If we're going to have
2736 any chance of handling watchpoints on local variables, we'll need
2737 the frame chain (so we can determine if we're in scope). */
2738 reinit_frame_cache ();
2739 fr = frame_find_by_id (b->watchpoint_frame);
2740 within_current_scope = (fr != NULL);
2742 /* If we've gotten confused in the unwinder, we might have
2743 returned a frame that can't describe this variable. */
2744 if (within_current_scope
2745 && (block_linkage_function (b->exp_valid_block)
2746 != get_frame_function (fr)))
2747 within_current_scope = 0;
2749 /* in_function_epilogue_p() returns a non-zero value if we're still
2750 in the function but the stack frame has already been invalidated.
2751 Since we can't rely on the values of local variables after the
2752 stack has been destroyed, we are treating the watchpoint in that
2753 state as `not changed' without further checking.
2755 vinschen/2003-09-04: The former implementation left out the case
2756 that the watchpoint frame couldn't be found by frame_find_by_id()
2757 because the current PC is currently in an epilogue. Calling
2758 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2759 if (!within_current_scope || fr == get_current_frame ())
2761 struct frame_info *frame = get_current_frame ();
2762 struct gdbarch *frame_arch = get_frame_arch (frame);
2763 CORE_ADDR frame_pc = get_frame_pc (frame);
2765 if (gdbarch_in_function_epilogue_p (frame_arch, frame_pc))
2766 return WP_VALUE_NOT_CHANGED;
2768 if (fr && within_current_scope)
2769 /* If we end up stopping, the current frame will get selected
2770 in normal_stop. So this call to select_frame won't affect
2775 if (within_current_scope)
2777 /* We use value_{,free_to_}mark because it could be a
2778 *long* time before we return to the command level and
2779 call free_all_values. We can't call free_all_values because
2780 we might be in the middle of evaluating a function call. */
2782 struct value *mark = value_mark ();
2783 struct value *new_val;
2785 fetch_watchpoint_value (b->exp, &new_val, NULL, NULL);
2786 if ((b->val != NULL) != (new_val != NULL)
2787 || (b->val != NULL && !value_equal (b->val, new_val)))
2789 if (new_val != NULL)
2791 release_value (new_val);
2792 value_free_to_mark (mark);
2794 bs->old_val = b->val;
2797 /* We will stop here */
2798 return WP_VALUE_CHANGED;
2802 /* Nothing changed, don't do anything. */
2803 value_free_to_mark (mark);
2804 /* We won't stop here */
2805 return WP_VALUE_NOT_CHANGED;
2810 /* This seems like the only logical thing to do because
2811 if we temporarily ignored the watchpoint, then when
2812 we reenter the block in which it is valid it contains
2813 garbage (in the case of a function, it may have two
2814 garbage values, one before and one after the prologue).
2815 So we can't even detect the first assignment to it and
2816 watch after that (since the garbage may or may not equal
2817 the first value assigned). */
2818 /* We print all the stop information in print_it_typical(), but
2819 in this case, by the time we call print_it_typical() this bp
2820 will be deleted already. So we have no choice but print the
2821 information here. */
2822 if (ui_out_is_mi_like_p (uiout))
2824 (uiout, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE));
2825 ui_out_text (uiout, "\nWatchpoint ");
2826 ui_out_field_int (uiout, "wpnum", b->number);
2827 ui_out_text (uiout, " deleted because the program has left the block in\n\
2828 which its expression is valid.\n");
2830 if (b->related_breakpoint)
2831 b->related_breakpoint->disposition = disp_del_at_next_stop;
2832 b->disposition = disp_del_at_next_stop;
2838 /* Return true if it looks like target has stopped due to hitting
2839 breakpoint location BL. This function does not check if we
2840 should stop, only if BL explains the stop. */
2842 bpstat_check_location (const struct bp_location *bl, CORE_ADDR bp_addr)
2844 struct breakpoint *b = bl->owner;
2846 if (b->type != bp_watchpoint
2847 && b->type != bp_hardware_watchpoint
2848 && b->type != bp_read_watchpoint
2849 && b->type != bp_access_watchpoint
2850 && b->type != bp_hardware_breakpoint
2851 && b->type != bp_catchpoint) /* a non-watchpoint bp */
2853 if (bl->address != bp_addr) /* address doesn't match */
2855 if (overlay_debugging /* unmapped overlay section */
2856 && section_is_overlay (bl->section)
2857 && !section_is_mapped (bl->section))
2861 /* Continuable hardware watchpoints are treated as non-existent if the
2862 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2863 some data address). Otherwise gdb won't stop on a break instruction
2864 in the code (not from a breakpoint) when a hardware watchpoint has
2865 been defined. Also skip watchpoints which we know did not trigger
2866 (did not match the data address). */
2868 if ((b->type == bp_hardware_watchpoint
2869 || b->type == bp_read_watchpoint
2870 || b->type == bp_access_watchpoint)
2871 && b->watchpoint_triggered == watch_triggered_no)
2874 if (b->type == bp_hardware_breakpoint)
2876 if (bl->address != bp_addr)
2878 if (overlay_debugging /* unmapped overlay section */
2879 && section_is_overlay (bl->section)
2880 && !section_is_mapped (bl->section))
2884 if (b->type == bp_catchpoint)
2886 gdb_assert (b->ops != NULL && b->ops->breakpoint_hit != NULL);
2887 if (!b->ops->breakpoint_hit (b))
2894 /* If BS refers to a watchpoint, determine if the watched values
2895 has actually changed, and we should stop. If not, set BS->stop
2898 bpstat_check_watchpoint (bpstat bs)
2900 const struct bp_location *bl = bs->breakpoint_at;
2901 struct breakpoint *b = bl->owner;
2903 if (b->type == bp_watchpoint
2904 || b->type == bp_read_watchpoint
2905 || b->type == bp_access_watchpoint
2906 || b->type == bp_hardware_watchpoint)
2910 int must_check_value = 0;
2912 if (b->type == bp_watchpoint)
2913 /* For a software watchpoint, we must always check the
2915 must_check_value = 1;
2916 else if (b->watchpoint_triggered == watch_triggered_yes)
2917 /* We have a hardware watchpoint (read, write, or access)
2918 and the target earlier reported an address watched by
2920 must_check_value = 1;
2921 else if (b->watchpoint_triggered == watch_triggered_unknown
2922 && b->type == bp_hardware_watchpoint)
2923 /* We were stopped by a hardware watchpoint, but the target could
2924 not report the data address. We must check the watchpoint's
2925 value. Access and read watchpoints are out of luck; without
2926 a data address, we can't figure it out. */
2927 must_check_value = 1;
2929 if (must_check_value)
2931 char *message = xstrprintf ("Error evaluating expression for watchpoint %d\n",
2933 struct cleanup *cleanups = make_cleanup (xfree, message);
2934 int e = catch_errors (watchpoint_check, bs, message,
2936 do_cleanups (cleanups);
2940 /* We've already printed what needs to be printed. */
2941 bs->print_it = print_it_done;
2944 case WP_VALUE_CHANGED:
2945 if (b->type == bp_read_watchpoint)
2947 /* Don't stop: read watchpoints shouldn't fire if
2948 the value has changed. This is for targets
2949 which cannot set read-only watchpoints. */
2950 bs->print_it = print_it_noop;
2954 case WP_VALUE_NOT_CHANGED:
2955 if (b->type == bp_hardware_watchpoint
2956 || b->type == bp_watchpoint)
2958 /* Don't stop: write watchpoints shouldn't fire if
2959 the value hasn't changed. */
2960 bs->print_it = print_it_noop;
2968 /* Error from catch_errors. */
2969 printf_filtered (_("Watchpoint %d deleted.\n"), b->number);
2970 if (b->related_breakpoint)
2971 b->related_breakpoint->disposition = disp_del_at_next_stop;
2972 b->disposition = disp_del_at_next_stop;
2973 /* We've already printed what needs to be printed. */
2974 bs->print_it = print_it_done;
2978 else /* must_check_value == 0 */
2980 /* This is a case where some watchpoint(s) triggered, but
2981 not at the address of this watchpoint, or else no
2982 watchpoint triggered after all. So don't print
2983 anything for this watchpoint. */
2984 bs->print_it = print_it_noop;
2991 /* Check conditions (condition proper, frame, thread and ignore count)
2992 of breakpoint referred to by BS. If we should not stop for this
2993 breakpoint, set BS->stop to 0. */
2995 bpstat_check_breakpoint_conditions (bpstat bs, ptid_t ptid)
2997 int thread_id = pid_to_thread_id (ptid);
2998 const struct bp_location *bl = bs->breakpoint_at;
2999 struct breakpoint *b = bl->owner;
3001 if (frame_id_p (b->frame_id)
3002 && !frame_id_eq (b->frame_id, get_frame_id (get_current_frame ())))
3006 int value_is_zero = 0;
3008 /* If this is a scope breakpoint, mark the associated
3009 watchpoint as triggered so that we will handle the
3010 out-of-scope event. We'll get to the watchpoint next
3012 if (b->type == bp_watchpoint_scope)
3013 b->related_breakpoint->watchpoint_triggered = watch_triggered_yes;
3015 if (bl->cond && bl->owner->disposition != disp_del_at_next_stop)
3017 /* We use value_mark and value_free_to_mark because it could
3018 be a long time before we return to the command level and
3019 call free_all_values. We can't call free_all_values
3020 because we might be in the middle of evaluating a
3022 struct value *mark = value_mark ();
3024 /* Need to select the frame, with all that implies
3025 so that the conditions will have the right context. */
3026 select_frame (get_current_frame ());
3028 = catch_errors (breakpoint_cond_eval, (bl->cond),
3029 "Error in testing breakpoint condition:\n",
3031 /* FIXME-someday, should give breakpoint # */
3032 value_free_to_mark (mark);
3034 if (bl->cond && value_is_zero)
3038 else if (b->thread != -1 && b->thread != thread_id)
3042 else if (b->ignore_count > 0)
3045 annotate_ignore_count_change ();
3047 /* Increase the hit count even though we don't
3055 /* Get a bpstat associated with having just stopped at address
3056 BP_ADDR in thread PTID.
3058 Determine whether we stopped at a breakpoint, etc, or whether we
3059 don't understand this stop. Result is a chain of bpstat's such that:
3061 if we don't understand the stop, the result is a null pointer.
3063 if we understand why we stopped, the result is not null.
3065 Each element of the chain refers to a particular breakpoint or
3066 watchpoint at which we have stopped. (We may have stopped for
3067 several reasons concurrently.)
3069 Each element of the chain has valid next, breakpoint_at,
3070 commands, FIXME??? fields. */
3073 bpstat_stop_status (CORE_ADDR bp_addr, ptid_t ptid)
3075 struct breakpoint *b = NULL;
3076 const struct bp_location *bl;
3077 struct bp_location *loc;
3078 /* Root of the chain of bpstat's */
3079 struct bpstats root_bs[1];
3080 /* Pointer to the last thing in the chain currently. */
3081 bpstat bs = root_bs;
3083 int need_remove_insert;
3085 ALL_BP_LOCATIONS (bl)
3089 if (!breakpoint_enabled (b) && b->enable_state != bp_permanent)
3092 /* For hardware watchpoints, we look only at the first location.
3093 The watchpoint_check function will work on entire expression,
3094 not the individual locations. For read watchopints, the
3095 watchpoints_triggered function have checked all locations
3098 if (b->type == bp_hardware_watchpoint && bl != b->loc)
3101 if (!bpstat_check_location (bl, bp_addr))
3104 /* Come here if it's a watchpoint, or if the break address matches */
3106 bs = bpstat_alloc (bl, bs); /* Alloc a bpstat to explain stop */
3108 /* Assume we stop. Should we find watchpoint that is not actually
3109 triggered, or if condition of breakpoint is false, we'll reset
3114 bpstat_check_watchpoint (bs);
3118 if (b->type == bp_thread_event || b->type == bp_overlay_event)
3119 /* We do not stop for these. */
3122 bpstat_check_breakpoint_conditions (bs, ptid);
3128 /* We will stop here */
3129 if (b->disposition == disp_disable)
3131 if (b->enable_state != bp_permanent)
3132 b->enable_state = bp_disabled;
3133 update_global_location_list (0);
3137 bs->commands = b->commands;
3139 (strcmp ("silent", bs->commands->line) == 0
3140 || (xdb_commands && strcmp ("Q", bs->commands->line) == 0)))
3142 bs->commands = bs->commands->next;
3145 bs->commands = copy_command_lines (bs->commands);
3148 /* Print nothing for this entry if we dont stop or if we dont print. */
3149 if (bs->stop == 0 || bs->print == 0)
3150 bs->print_it = print_it_noop;
3153 for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix)
3155 if (loc->address == bp_addr)
3157 bs = bpstat_alloc (loc, bs);
3158 /* For hits of moribund locations, we should just proceed. */
3161 bs->print_it = print_it_noop;
3165 bs->next = NULL; /* Terminate the chain */
3166 bs = root_bs->next; /* Re-grab the head of the chain */
3168 /* If we aren't stopping, the value of some hardware watchpoint may
3169 not have changed, but the intermediate memory locations we are
3170 watching may have. Don't bother if we're stopping; this will get
3172 for (bs = root_bs->next; bs != NULL; bs = bs->next)
3176 need_remove_insert = 0;
3178 for (bs = root_bs->next; bs != NULL; bs = bs->next)
3180 && bs->breakpoint_at->owner
3181 && (bs->breakpoint_at->owner->type == bp_hardware_watchpoint
3182 || bs->breakpoint_at->owner->type == bp_read_watchpoint
3183 || bs->breakpoint_at->owner->type == bp_access_watchpoint))
3185 /* remove/insert can invalidate bs->breakpoint_at, if this
3186 location is no longer used by the watchpoint. Prevent
3187 further code from trying to use it. */
3188 bs->breakpoint_at = NULL;
3189 need_remove_insert = 1;
3192 if (need_remove_insert)
3194 remove_breakpoints ();
3195 insert_breakpoints ();
3198 return root_bs->next;
3201 /* Tell what to do about this bpstat. */
3203 bpstat_what (bpstat bs)
3205 /* Classify each bpstat as one of the following. */
3208 /* This bpstat element has no effect on the main_action. */
3211 /* There was a watchpoint, stop but don't print. */
3214 /* There was a watchpoint, stop and print. */
3217 /* There was a breakpoint but we're not stopping. */
3220 /* There was a breakpoint, stop but don't print. */
3223 /* There was a breakpoint, stop and print. */
3226 /* We hit the longjmp breakpoint. */
3229 /* We hit the longjmp_resume breakpoint. */
3232 /* We hit the step_resume breakpoint. */
3235 /* We hit the shared library event breakpoint. */
3238 /* This is just used to count how many enums there are. */
3242 /* Here is the table which drives this routine. So that we can
3243 format it pretty, we define some abbreviations for the
3244 enum bpstat_what codes. */
3245 #define kc BPSTAT_WHAT_KEEP_CHECKING
3246 #define ss BPSTAT_WHAT_STOP_SILENT
3247 #define sn BPSTAT_WHAT_STOP_NOISY
3248 #define sgl BPSTAT_WHAT_SINGLE
3249 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3250 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3251 #define sr BPSTAT_WHAT_STEP_RESUME
3252 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3254 /* "Can't happen." Might want to print an error message.
3255 abort() is not out of the question, but chances are GDB is just
3256 a bit confused, not unusable. */
3257 #define err BPSTAT_WHAT_STOP_NOISY
3259 /* Given an old action and a class, come up with a new action. */
3260 /* One interesting property of this table is that wp_silent is the same
3261 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3262 after stopping, the check for whether to step over a breakpoint
3263 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3264 reference to how we stopped. We retain separate wp_silent and
3265 bp_silent codes in case we want to change that someday.
3267 Another possibly interesting property of this table is that
3268 there's a partial ordering, priority-like, of the actions. Once
3269 you've decided that some action is appropriate, you'll never go
3270 back and decide something of a lower priority is better. The
3273 kc < clr sgl shl slr sn sr ss
3274 sgl < shl slr sn sr ss
3275 slr < err shl sn sr ss
3276 clr < err shl sn sr ss
3282 What I think this means is that we don't need a damned table
3283 here. If you just put the rows and columns in the right order,
3284 it'd look awfully regular. We could simply walk the bpstat list
3285 and choose the highest priority action we find, with a little
3286 logic to handle the 'err' cases. */
3288 /* step_resume entries: a step resume breakpoint overrides another
3289 breakpoint of signal handling (see comment in wait_for_inferior
3290 at where we set the step_resume breakpoint). */
3292 static const enum bpstat_what_main_action
3293 table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
3296 /* kc ss sn sgl slr clr sr shl
3299 {kc, ss, sn, sgl, slr, clr, sr, shl},
3301 {ss, ss, sn, ss, ss, ss, sr, shl},
3303 {sn, sn, sn, sn, sn, sn, sr, shl},
3305 {sgl, ss, sn, sgl, slr, slr, sr, shl},
3307 {ss, ss, sn, ss, ss, ss, sr, shl},
3309 {sn, sn, sn, sn, sn, sn, sr, shl},
3311 {slr, ss, sn, slr, slr, err, sr, shl},
3313 {clr, ss, sn, err, err, err, sr, shl},
3315 {sr, sr, sr, sr, sr, sr, sr, sr},
3317 {shl, shl, shl, shl, shl, shl, sr, shl}
3330 enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
3331 struct bpstat_what retval;
3333 retval.call_dummy = 0;
3334 for (; bs != NULL; bs = bs->next)
3336 enum class bs_class = no_effect;
3337 if (bs->breakpoint_at == NULL)
3338 /* I suspect this can happen if it was a momentary breakpoint
3339 which has since been deleted. */
3341 if (bs->breakpoint_at->owner == NULL)
3342 bs_class = bp_nostop;
3344 switch (bs->breakpoint_at->owner->type)
3350 case bp_hardware_breakpoint:
3356 bs_class = bp_noisy;
3358 bs_class = bp_silent;
3361 bs_class = bp_nostop;
3364 case bp_hardware_watchpoint:
3365 case bp_read_watchpoint:
3366 case bp_access_watchpoint:
3370 bs_class = wp_noisy;
3372 bs_class = wp_silent;
3375 /* There was a watchpoint, but we're not stopping.
3376 This requires no further action. */
3377 bs_class = no_effect;
3380 bs_class = long_jump;
3382 case bp_longjmp_resume:
3383 bs_class = long_resume;
3385 case bp_step_resume:
3388 bs_class = step_resume;
3391 /* It is for the wrong frame. */
3392 bs_class = bp_nostop;
3394 case bp_watchpoint_scope:
3395 bs_class = bp_nostop;
3397 case bp_shlib_event:
3398 bs_class = shlib_event;
3400 case bp_thread_event:
3401 case bp_overlay_event:
3402 bs_class = bp_nostop;
3408 bs_class = bp_noisy;
3410 bs_class = bp_silent;
3413 /* There was a catchpoint, but we're not stopping.
3414 This requires no further action. */
3415 bs_class = no_effect;
3418 /* Make sure the action is stop (silent or noisy),
3419 so infrun.c pops the dummy frame. */
3420 bs_class = bp_silent;
3421 retval.call_dummy = 1;
3424 /* Tracepoint hits should not be reported back to GDB, and
3425 if one got through somehow, it should have been filtered
3427 internal_error (__FILE__, __LINE__,
3428 _("bpstat_what: bp_tracepoint encountered"));
3431 current_action = table[(int) bs_class][(int) current_action];
3433 retval.main_action = current_action;
3437 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3438 without hardware support). This isn't related to a specific bpstat,
3439 just to things like whether watchpoints are set. */
3442 bpstat_should_step (void)
3444 struct breakpoint *b;
3446 if (breakpoint_enabled (b) && b->type == bp_watchpoint && b->loc != NULL)
3453 static void print_breakpoint_location (struct breakpoint *b,
3454 struct bp_location *loc,
3456 struct ui_stream *stb)
3461 = find_pc_sect_function (loc->address, loc->section);
3464 ui_out_text (uiout, "in ");
3465 ui_out_field_string (uiout, "func",
3466 SYMBOL_PRINT_NAME (sym));
3467 ui_out_wrap_hint (uiout, wrap_indent);
3468 ui_out_text (uiout, " at ");
3470 ui_out_field_string (uiout, "file", b->source_file);
3471 ui_out_text (uiout, ":");
3473 if (ui_out_is_mi_like_p (uiout))
3475 struct symtab_and_line sal = find_pc_line (loc->address, 0);
3476 char *fullname = symtab_to_fullname (sal.symtab);
3479 ui_out_field_string (uiout, "fullname", fullname);
3482 ui_out_field_int (uiout, "line", b->line_number);
3486 ui_out_field_string (uiout, "pending", b->addr_string);
3490 print_address_symbolic (loc->address, stb->stream, demangle, "");
3491 ui_out_field_stream (uiout, "at", stb);
3495 /* Print B to gdb_stdout. */
3497 print_one_breakpoint_location (struct breakpoint *b,
3498 struct bp_location *loc,
3500 CORE_ADDR *last_addr)
3502 struct command_line *l;
3504 struct ep_type_description
3509 static struct ep_type_description bptypes[] =
3511 {bp_none, "?deleted?"},
3512 {bp_breakpoint, "breakpoint"},
3513 {bp_hardware_breakpoint, "hw breakpoint"},
3514 {bp_until, "until"},
3515 {bp_finish, "finish"},
3516 {bp_watchpoint, "watchpoint"},
3517 {bp_hardware_watchpoint, "hw watchpoint"},
3518 {bp_read_watchpoint, "read watchpoint"},
3519 {bp_access_watchpoint, "acc watchpoint"},
3520 {bp_longjmp, "longjmp"},
3521 {bp_longjmp_resume, "longjmp resume"},
3522 {bp_step_resume, "step resume"},
3523 {bp_watchpoint_scope, "watchpoint scope"},
3524 {bp_call_dummy, "call dummy"},
3525 {bp_shlib_event, "shlib events"},
3526 {bp_thread_event, "thread events"},
3527 {bp_overlay_event, "overlay events"},
3528 {bp_catchpoint, "catchpoint"},
3529 {bp_tracepoint, "tracepoint"},
3532 static char bpenables[] = "nynny";
3533 char wrap_indent[80];
3534 struct ui_stream *stb = ui_out_stream_new (uiout);
3535 struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb);
3536 struct cleanup *bkpt_chain;
3538 int header_of_multiple = 0;
3539 int part_of_multiple = (loc != NULL);
3540 struct value_print_options opts;
3542 get_user_print_options (&opts);
3544 gdb_assert (!loc || loc_number != 0);
3545 /* See comment in print_one_breakpoint concerning
3546 treatment of breakpoints with single disabled
3550 && (b->loc->next != NULL || !b->loc->enabled)))
3551 header_of_multiple = 1;
3556 bkpt_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "bkpt");
3560 if (part_of_multiple)
3563 formatted = xstrprintf ("%d.%d", b->number, loc_number);
3564 ui_out_field_string (uiout, "number", formatted);
3569 ui_out_field_int (uiout, "number", b->number);
3574 if (part_of_multiple)
3575 ui_out_field_skip (uiout, "type");
3578 if (((int) b->type >= (sizeof (bptypes) / sizeof (bptypes[0])))
3579 || ((int) b->type != bptypes[(int) b->type].type))
3580 internal_error (__FILE__, __LINE__,
3581 _("bptypes table does not describe type #%d."),
3583 ui_out_field_string (uiout, "type", bptypes[(int) b->type].description);
3588 if (part_of_multiple)
3589 ui_out_field_skip (uiout, "disp");
3591 ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
3596 if (part_of_multiple)
3597 ui_out_field_string (uiout, "enabled", loc->enabled ? "y" : "n");
3599 ui_out_field_fmt (uiout, "enabled", "%c",
3600 bpenables[(int) b->enable_state]);
3601 ui_out_spaces (uiout, 2);
3605 strcpy (wrap_indent, " ");
3606 if (opts.addressprint)
3608 if (gdbarch_addr_bit (current_gdbarch) <= 32)
3609 strcat (wrap_indent, " ");
3611 strcat (wrap_indent, " ");
3614 if (b->ops != NULL && b->ops->print_one != NULL)
3616 /* Although the print_one can possibly print
3617 all locations, calling it here is not likely
3618 to get any nice result. So, make sure there's
3619 just one location. */
3620 gdb_assert (b->loc == NULL || b->loc->next == NULL);
3621 b->ops->print_one (b, last_addr);
3627 internal_error (__FILE__, __LINE__,
3628 _("print_one_breakpoint: bp_none encountered\n"));
3632 case bp_hardware_watchpoint:
3633 case bp_read_watchpoint:
3634 case bp_access_watchpoint:
3635 /* Field 4, the address, is omitted (which makes the columns
3636 not line up too nicely with the headers, but the effect
3637 is relatively readable). */
3638 if (opts.addressprint)
3639 ui_out_field_skip (uiout, "addr");
3641 ui_out_field_string (uiout, "what", b->exp_string);
3645 case bp_hardware_breakpoint:
3649 case bp_longjmp_resume:
3650 case bp_step_resume:
3651 case bp_watchpoint_scope:
3653 case bp_shlib_event:
3654 case bp_thread_event:
3655 case bp_overlay_event:
3657 if (opts.addressprint)
3660 if (header_of_multiple)
3661 ui_out_field_string (uiout, "addr", "<MULTIPLE>");
3662 else if (b->loc == NULL || loc->shlib_disabled)
3663 ui_out_field_string (uiout, "addr", "<PENDING>");
3665 ui_out_field_core_addr (uiout, "addr", loc->address);
3668 if (!header_of_multiple)
3669 print_breakpoint_location (b, loc, wrap_indent, stb);
3671 *last_addr = b->loc->address;
3675 if (!part_of_multiple)
3677 if (b->thread != -1)
3679 /* FIXME: This seems to be redundant and lost here; see the
3680 "stop only in" line a little further down. */
3681 ui_out_text (uiout, " thread ");
3682 ui_out_field_int (uiout, "thread", b->thread);
3684 else if (b->task != 0)
3686 ui_out_text (uiout, " task ");
3687 ui_out_field_int (uiout, "task", b->task);
3691 ui_out_text (uiout, "\n");
3693 if (part_of_multiple && frame_id_p (b->frame_id))
3696 ui_out_text (uiout, "\tstop only in stack frame at ");
3697 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3699 ui_out_field_core_addr (uiout, "frame", b->frame_id.stack_addr);
3700 ui_out_text (uiout, "\n");
3703 if (!part_of_multiple && b->cond_string && !ada_exception_catchpoint_p (b))
3705 /* We do not print the condition for Ada exception catchpoints
3706 because the condition is an internal implementation detail
3707 that we do not want to expose to the user. */
3709 if (b->type == bp_tracepoint)
3710 ui_out_text (uiout, "\ttrace only if ");
3712 ui_out_text (uiout, "\tstop only if ");
3713 ui_out_field_string (uiout, "cond", b->cond_string);
3714 ui_out_text (uiout, "\n");
3717 if (!part_of_multiple && b->thread != -1)
3719 /* FIXME should make an annotation for this */
3720 ui_out_text (uiout, "\tstop only in thread ");
3721 ui_out_field_int (uiout, "thread", b->thread);
3722 ui_out_text (uiout, "\n");
3725 if (!part_of_multiple && b->hit_count)
3727 /* FIXME should make an annotation for this */
3728 if (ep_is_catchpoint (b))
3729 ui_out_text (uiout, "\tcatchpoint");
3731 ui_out_text (uiout, "\tbreakpoint");
3732 ui_out_text (uiout, " already hit ");
3733 ui_out_field_int (uiout, "times", b->hit_count);
3734 if (b->hit_count == 1)
3735 ui_out_text (uiout, " time\n");
3737 ui_out_text (uiout, " times\n");
3740 /* Output the count also if it is zero, but only if this is
3741 mi. FIXME: Should have a better test for this. */
3742 if (ui_out_is_mi_like_p (uiout))
3743 if (!part_of_multiple && b->hit_count == 0)
3744 ui_out_field_int (uiout, "times", b->hit_count);
3746 if (!part_of_multiple && b->ignore_count)
3749 ui_out_text (uiout, "\tignore next ");
3750 ui_out_field_int (uiout, "ignore", b->ignore_count);
3751 ui_out_text (uiout, " hits\n");
3754 if (!part_of_multiple && (l = b->commands))
3756 struct cleanup *script_chain;
3759 script_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "script");
3760 print_command_lines (uiout, l, 4);
3761 do_cleanups (script_chain);
3764 if (!part_of_multiple && b->pass_count)
3766 annotate_field (10);
3767 ui_out_text (uiout, "\tpass count ");
3768 ui_out_field_int (uiout, "pass", b->pass_count);
3769 ui_out_text (uiout, " \n");
3772 if (!part_of_multiple && b->step_count)
3774 annotate_field (11);
3775 ui_out_text (uiout, "\tstep count ");
3776 ui_out_field_int (uiout, "step", b->step_count);
3777 ui_out_text (uiout, " \n");
3780 if (!part_of_multiple && b->actions)
3782 struct action_line *action;
3783 annotate_field (12);
3784 for (action = b->actions; action; action = action->next)
3786 ui_out_text (uiout, " A\t");
3787 ui_out_text (uiout, action->action);
3788 ui_out_text (uiout, "\n");
3792 if (ui_out_is_mi_like_p (uiout) && !part_of_multiple)
3795 ui_out_field_string (uiout, "original-location", b->addr_string);
3796 else if (b->exp_string)
3797 ui_out_field_string (uiout, "original-location", b->exp_string);
3800 do_cleanups (bkpt_chain);
3801 do_cleanups (old_chain);
3805 print_one_breakpoint (struct breakpoint *b,
3806 CORE_ADDR *last_addr)
3808 print_one_breakpoint_location (b, NULL, 0, last_addr);
3810 /* If this breakpoint has custom print function,
3811 it's already printed. Otherwise, print individual
3812 locations, if any. */
3813 if (b->ops == NULL || b->ops->print_one == NULL)
3815 /* If breakpoint has a single location that is
3816 disabled, we print it as if it had
3817 several locations, since otherwise it's hard to
3818 represent "breakpoint enabled, location disabled"
3820 Note that while hardware watchpoints have
3821 several locations internally, that's no a property
3824 && !is_hardware_watchpoint (b)
3825 && (b->loc->next || !b->loc->enabled)
3826 && !ui_out_is_mi_like_p (uiout))
3828 struct bp_location *loc;
3830 for (loc = b->loc; loc; loc = loc->next, ++n)
3831 print_one_breakpoint_location (b, loc, n, last_addr);
3837 struct captured_breakpoint_query_args
3843 do_captured_breakpoint_query (struct ui_out *uiout, void *data)
3845 struct captured_breakpoint_query_args *args = data;
3846 struct breakpoint *b;
3847 CORE_ADDR dummy_addr = 0;
3850 if (args->bnum == b->number)
3852 print_one_breakpoint (b, &dummy_addr);
3860 gdb_breakpoint_query (struct ui_out *uiout, int bnum, char **error_message)
3862 struct captured_breakpoint_query_args args;
3864 /* For the moment we don't trust print_one_breakpoint() to not throw
3866 if (catch_exceptions_with_msg (uiout, do_captured_breakpoint_query, &args,
3867 error_message, RETURN_MASK_ALL) < 0)
3873 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3874 catchpoints, et.al.). */
3877 user_settable_breakpoint (const struct breakpoint *b)
3879 return (b->type == bp_breakpoint
3880 || b->type == bp_catchpoint
3881 || b->type == bp_hardware_breakpoint
3882 || b->type == bp_tracepoint
3883 || b->type == bp_watchpoint
3884 || b->type == bp_read_watchpoint
3885 || b->type == bp_access_watchpoint
3886 || b->type == bp_hardware_watchpoint);
3889 /* Print information on user settable breakpoint (watchpoint, etc)
3890 number BNUM. If BNUM is -1 print all user settable breakpoints.
3891 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3894 breakpoint_1 (int bnum, int allflag)
3896 struct breakpoint *b;
3897 CORE_ADDR last_addr = (CORE_ADDR) -1;
3898 int nr_printable_breakpoints;
3899 struct cleanup *bkpttbl_chain;
3900 struct value_print_options opts;
3902 get_user_print_options (&opts);
3904 /* Compute the number of rows in the table. */
3905 nr_printable_breakpoints = 0;
3908 || bnum == b->number)
3910 if (allflag || user_settable_breakpoint (b))
3911 nr_printable_breakpoints++;
3914 if (opts.addressprint)
3916 = make_cleanup_ui_out_table_begin_end (uiout, 6, nr_printable_breakpoints,
3920 = make_cleanup_ui_out_table_begin_end (uiout, 5, nr_printable_breakpoints,
3923 if (nr_printable_breakpoints > 0)
3924 annotate_breakpoints_headers ();
3925 if (nr_printable_breakpoints > 0)
3927 ui_out_table_header (uiout, 7, ui_left, "number", "Num"); /* 1 */
3928 if (nr_printable_breakpoints > 0)
3930 ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */
3931 if (nr_printable_breakpoints > 0)
3933 ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */
3934 if (nr_printable_breakpoints > 0)
3936 ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */
3937 if (opts.addressprint)
3939 if (nr_printable_breakpoints > 0)
3941 if (gdbarch_addr_bit (current_gdbarch) <= 32)
3942 ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */
3944 ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */
3946 if (nr_printable_breakpoints > 0)
3948 ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */
3949 ui_out_table_body (uiout);
3950 if (nr_printable_breakpoints > 0)
3951 annotate_breakpoints_table ();
3955 || bnum == b->number)
3957 /* We only print out user settable breakpoints unless the
3959 if (allflag || user_settable_breakpoint (b))
3960 print_one_breakpoint (b, &last_addr);
3963 do_cleanups (bkpttbl_chain);
3965 if (nr_printable_breakpoints == 0)
3968 ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n");
3970 ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n",
3975 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3976 that a comparison of an unsigned with -1 is always false. */
3977 if (last_addr != (CORE_ADDR) -1 && !server_command)
3978 set_next_address (current_gdbarch, last_addr);
3981 /* FIXME? Should this be moved up so that it is only called when
3982 there have been breakpoints? */
3983 annotate_breakpoints_table_end ();
3987 breakpoints_info (char *bnum_exp, int from_tty)
3992 bnum = parse_and_eval_long (bnum_exp);
3994 breakpoint_1 (bnum, 0);
3998 maintenance_info_breakpoints (char *bnum_exp, int from_tty)
4003 bnum = parse_and_eval_long (bnum_exp);
4005 breakpoint_1 (bnum, 1);
4009 breakpoint_has_pc (struct breakpoint *b,
4010 CORE_ADDR pc, struct obj_section *section)
4012 struct bp_location *bl = b->loc;
4013 for (; bl; bl = bl->next)
4015 if (bl->address == pc
4016 && (!overlay_debugging || bl->section == section))
4022 /* Print a message describing any breakpoints set at PC. */
4025 describe_other_breakpoints (CORE_ADDR pc, struct obj_section *section,
4029 struct breakpoint *b;
4032 others += breakpoint_has_pc (b, pc, section);
4036 printf_filtered (_("Note: breakpoint "));
4037 else /* if (others == ???) */
4038 printf_filtered (_("Note: breakpoints "));
4040 if (breakpoint_has_pc (b, pc, section))
4043 printf_filtered ("%d", b->number);
4044 if (b->thread == -1 && thread != -1)
4045 printf_filtered (" (all threads)");
4046 else if (b->thread != -1)
4047 printf_filtered (" (thread %d)", b->thread);
4048 printf_filtered ("%s%s ",
4049 ((b->enable_state == bp_disabled ||
4050 b->enable_state == bp_call_disabled)
4052 : b->enable_state == bp_permanent
4056 : ((others == 1) ? " and" : ""));
4058 printf_filtered (_("also set at pc "));
4059 fputs_filtered (paddress (pc), gdb_stdout);
4060 printf_filtered (".\n");
4064 /* Set the default place to put a breakpoint
4065 for the `break' command with no arguments. */
4068 set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab,
4071 default_breakpoint_valid = valid;
4072 default_breakpoint_address = addr;
4073 default_breakpoint_symtab = symtab;
4074 default_breakpoint_line = line;
4077 /* Return true iff it is meaningful to use the address member of
4078 BPT. For some breakpoint types, the address member is irrelevant
4079 and it makes no sense to attempt to compare it to other addresses
4080 (or use it for any other purpose either).
4082 More specifically, each of the following breakpoint types will always
4083 have a zero valued address and we don't want check_duplicates() to mark
4084 breakpoints of any of these types to be a duplicate of an actual
4085 breakpoint at address zero:
4088 bp_hardware_watchpoint
4090 bp_access_watchpoint
4094 breakpoint_address_is_meaningful (struct breakpoint *bpt)
4096 enum bptype type = bpt->type;
4098 return (type != bp_watchpoint
4099 && type != bp_hardware_watchpoint
4100 && type != bp_read_watchpoint
4101 && type != bp_access_watchpoint
4102 && type != bp_catchpoint);
4105 /* Rescan breakpoints at the same address and section as BPT,
4106 marking the first one as "first" and any others as "duplicates".
4107 This is so that the bpt instruction is only inserted once.
4108 If we have a permanent breakpoint at the same place as BPT, make
4109 that one the official one, and the rest as duplicates. */
4112 check_duplicates_for (CORE_ADDR address, struct obj_section *section)
4114 struct bp_location *b;
4116 struct bp_location *perm_bp = 0;
4118 ALL_BP_LOCATIONS (b)
4119 if (b->owner->enable_state != bp_disabled
4120 && b->owner->enable_state != bp_call_disabled
4122 && !b->shlib_disabled
4123 && b->address == address /* address / overlay match */
4124 && (!overlay_debugging || b->section == section)
4125 && breakpoint_address_is_meaningful (b->owner))
4127 /* Have we found a permanent breakpoint? */
4128 if (b->owner->enable_state == bp_permanent)
4135 b->duplicate = count > 1;
4138 /* If we found a permanent breakpoint at this address, go over the
4139 list again and declare all the other breakpoints there (except
4140 other permanent breakpoints) to be the duplicates. */
4143 perm_bp->duplicate = 0;
4145 /* Permanent breakpoint should always be inserted. */
4146 if (! perm_bp->inserted)
4147 internal_error (__FILE__, __LINE__,
4148 _("allegedly permanent breakpoint is not "
4149 "actually inserted"));
4151 ALL_BP_LOCATIONS (b)
4154 if (b->owner->enable_state != bp_permanent
4155 && b->owner->enable_state != bp_disabled
4156 && b->owner->enable_state != bp_call_disabled
4157 && b->enabled && !b->shlib_disabled
4158 && b->address == address /* address / overlay match */
4159 && (!overlay_debugging || b->section == section)
4160 && breakpoint_address_is_meaningful (b->owner))
4163 internal_error (__FILE__, __LINE__,
4164 _("another breakpoint was inserted on top of "
4165 "a permanent breakpoint"));
4174 check_duplicates (struct breakpoint *bpt)
4176 struct bp_location *bl = bpt->loc;
4178 if (! breakpoint_address_is_meaningful (bpt))
4181 for (; bl; bl = bl->next)
4182 check_duplicates_for (bl->address, bl->section);
4186 breakpoint_adjustment_warning (CORE_ADDR from_addr, CORE_ADDR to_addr,
4187 int bnum, int have_bnum)
4192 strcpy (astr1, hex_string_custom ((unsigned long) from_addr, 8));
4193 strcpy (astr2, hex_string_custom ((unsigned long) to_addr, 8));
4195 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4196 bnum, astr1, astr2);
4198 warning (_("Breakpoint address adjusted from %s to %s."), astr1, astr2);
4201 /* Adjust a breakpoint's address to account for architectural constraints
4202 on breakpoint placement. Return the adjusted address. Note: Very
4203 few targets require this kind of adjustment. For most targets,
4204 this function is simply the identity function. */
4207 adjust_breakpoint_address (CORE_ADDR bpaddr, enum bptype bptype)
4209 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch))
4211 /* Very few targets need any kind of breakpoint adjustment. */
4214 else if (bptype == bp_watchpoint
4215 || bptype == bp_hardware_watchpoint
4216 || bptype == bp_read_watchpoint
4217 || bptype == bp_access_watchpoint
4218 || bptype == bp_catchpoint)
4220 /* Watchpoints and the various bp_catch_* eventpoints should not
4221 have their addresses modified. */
4226 CORE_ADDR adjusted_bpaddr;
4228 /* Some targets have architectural constraints on the placement
4229 of breakpoint instructions. Obtain the adjusted address. */
4230 adjusted_bpaddr = gdbarch_adjust_breakpoint_address (current_gdbarch,
4233 /* An adjusted breakpoint address can significantly alter
4234 a user's expectations. Print a warning if an adjustment
4236 if (adjusted_bpaddr != bpaddr)
4237 breakpoint_adjustment_warning (bpaddr, adjusted_bpaddr, 0, 0);
4239 return adjusted_bpaddr;
4243 /* Allocate a struct bp_location. */
4245 static struct bp_location *
4246 allocate_bp_location (struct breakpoint *bpt)
4248 struct bp_location *loc, *loc_p;
4250 loc = xmalloc (sizeof (struct bp_location));
4251 memset (loc, 0, sizeof (*loc));
4255 loc->shlib_disabled = 0;
4265 case bp_longjmp_resume:
4266 case bp_step_resume:
4267 case bp_watchpoint_scope:
4269 case bp_shlib_event:
4270 case bp_thread_event:
4271 case bp_overlay_event:
4272 loc->loc_type = bp_loc_software_breakpoint;
4274 case bp_hardware_breakpoint:
4275 loc->loc_type = bp_loc_hardware_breakpoint;
4277 case bp_hardware_watchpoint:
4278 case bp_read_watchpoint:
4279 case bp_access_watchpoint:
4280 loc->loc_type = bp_loc_hardware_watchpoint;
4284 loc->loc_type = bp_loc_other;
4287 internal_error (__FILE__, __LINE__, _("unknown breakpoint type"));
4293 static void free_bp_location (struct bp_location *loc)
4298 if (loc->function_name)
4299 xfree (loc->function_name);
4304 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4305 that has type BPTYPE and has no locations as yet. */
4307 static struct breakpoint *
4308 set_raw_breakpoint_without_location (enum bptype bptype)
4310 struct breakpoint *b, *b1;
4312 b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
4313 memset (b, 0, sizeof (*b));
4316 b->language = current_language->la_language;
4317 b->input_radix = input_radix;
4319 b->enable_state = bp_enabled;
4322 b->ignore_count = 0;
4324 b->frame_id = null_frame_id;
4325 b->forked_inferior_pid = null_ptid;
4326 b->exec_pathname = NULL;
4328 b->condition_not_parsed = 0;
4330 /* Add this breakpoint to the end of the chain
4331 so that a list of breakpoints will come out in order
4332 of increasing numbers. */
4334 b1 = breakpoint_chain;
4336 breakpoint_chain = b;
4346 /* Initialize loc->function_name. */
4348 set_breakpoint_location_function (struct bp_location *loc)
4350 if (loc->owner->type == bp_breakpoint
4351 || loc->owner->type == bp_hardware_breakpoint
4352 || loc->owner->type == bp_tracepoint)
4354 find_pc_partial_function (loc->address, &(loc->function_name),
4356 if (loc->function_name)
4357 loc->function_name = xstrdup (loc->function_name);
4361 /* set_raw_breakpoint is a low level routine for allocating and
4362 partially initializing a breakpoint of type BPTYPE. The newly
4363 created breakpoint's address, section, source file name, and line
4364 number are provided by SAL. The newly created and partially
4365 initialized breakpoint is added to the breakpoint chain and
4366 is also returned as the value of this function.
4368 It is expected that the caller will complete the initialization of
4369 the newly created breakpoint struct as well as output any status
4370 information regarding the creation of a new breakpoint. In
4371 particular, set_raw_breakpoint does NOT set the breakpoint
4372 number! Care should be taken to not allow an error to occur
4373 prior to completing the initialization of the breakpoint. If this
4374 should happen, a bogus breakpoint will be left on the chain. */
4377 set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype)
4379 struct breakpoint *b = set_raw_breakpoint_without_location (bptype);
4380 CORE_ADDR adjusted_address;
4382 /* Adjust the breakpoint's address prior to allocating a location.
4383 Once we call allocate_bp_location(), that mostly uninitialized
4384 location will be placed on the location chain. Adjustment of the
4385 breakpoint may cause target_read_memory() to be called and we do
4386 not want its scan of the location chain to find a breakpoint and
4387 location that's only been partially initialized. */
4388 adjusted_address = adjust_breakpoint_address (sal.pc, b->type);
4390 b->loc = allocate_bp_location (b);
4391 b->loc->requested_address = sal.pc;
4392 b->loc->address = adjusted_address;
4394 if (sal.symtab == NULL)
4395 b->source_file = NULL;
4397 b->source_file = savestring (sal.symtab->filename,
4398 strlen (sal.symtab->filename));
4399 b->loc->section = sal.section;
4400 b->line_number = sal.line;
4402 set_breakpoint_location_function (b->loc);
4404 breakpoints_changed ();
4410 /* Note that the breakpoint object B describes a permanent breakpoint
4411 instruction, hard-wired into the inferior's code. */
4413 make_breakpoint_permanent (struct breakpoint *b)
4415 struct bp_location *bl;
4416 b->enable_state = bp_permanent;
4418 /* By definition, permanent breakpoints are already present in the code.
4419 Mark all locations as inserted. For now, make_breakpoint_permanent
4420 is called in just one place, so it's hard to say if it's reasonable
4421 to have permanent breakpoint with multiple locations or not,
4422 but it's easy to implmement. */
4423 for (bl = b->loc; bl; bl = bl->next)
4428 create_longjmp_breakpoint (char *func_name)
4430 struct minimal_symbol *m;
4432 if ((m = lookup_minimal_symbol_text (func_name, NULL)) == NULL)
4434 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m), bp_longjmp);
4435 update_global_location_list (1);
4438 /* Call this routine when stepping and nexting to enable a breakpoint
4439 if we do a longjmp(). When we hit that breakpoint, call
4440 set_longjmp_resume_breakpoint() to figure out where we are going. */
4443 set_longjmp_breakpoint (void)
4445 if (gdbarch_get_longjmp_target_p (current_gdbarch))
4447 create_longjmp_breakpoint ("longjmp");
4448 create_longjmp_breakpoint ("_longjmp");
4449 create_longjmp_breakpoint ("siglongjmp");
4450 create_longjmp_breakpoint ("_siglongjmp");
4454 /* Delete all longjmp breakpoints from THREAD. */
4456 delete_longjmp_breakpoint (int thread)
4458 struct breakpoint *b, *temp;
4460 ALL_BREAKPOINTS_SAFE (b, temp)
4461 if (b->type == bp_longjmp)
4463 if (b->thread == thread)
4464 delete_breakpoint (b);
4469 enable_overlay_breakpoints (void)
4471 struct breakpoint *b;
4474 if (b->type == bp_overlay_event)
4476 b->enable_state = bp_enabled;
4477 update_global_location_list (1);
4478 overlay_events_enabled = 1;
4483 disable_overlay_breakpoints (void)
4485 struct breakpoint *b;
4488 if (b->type == bp_overlay_event)
4490 b->enable_state = bp_disabled;
4491 update_global_location_list (0);
4492 overlay_events_enabled = 0;
4497 create_thread_event_breakpoint (CORE_ADDR address)
4499 struct breakpoint *b;
4501 b = create_internal_breakpoint (address, bp_thread_event);
4503 b->enable_state = bp_enabled;
4504 /* addr_string has to be used or breakpoint_re_set will delete me. */
4505 b->addr_string = xstrprintf ("*0x%s", paddr (b->loc->address));
4507 update_global_location_list_nothrow (1);
4513 remove_thread_event_breakpoints (void)
4515 struct breakpoint *b, *temp;
4517 ALL_BREAKPOINTS_SAFE (b, temp)
4518 if (b->type == bp_thread_event)
4519 delete_breakpoint (b);
4522 struct captured_parse_breakpoint_args
4525 struct symtabs_and_lines *sals_p;
4526 char ***addr_string_p;
4530 struct lang_and_radix
4538 remove_solib_event_breakpoints (void)
4540 struct breakpoint *b, *temp;
4542 ALL_BREAKPOINTS_SAFE (b, temp)
4543 if (b->type == bp_shlib_event)
4544 delete_breakpoint (b);
4548 create_solib_event_breakpoint (CORE_ADDR address)
4550 struct breakpoint *b;
4552 b = create_internal_breakpoint (address, bp_shlib_event);
4553 update_global_location_list_nothrow (1);
4557 /* Disable any breakpoints that are on code in shared libraries. Only
4558 apply to enabled breakpoints, disabled ones can just stay disabled. */
4561 disable_breakpoints_in_shlibs (void)
4563 struct bp_location *loc;
4565 ALL_BP_LOCATIONS (loc)
4567 struct breakpoint *b = loc->owner;
4568 /* We apply the check to all breakpoints, including disabled
4569 for those with loc->duplicate set. This is so that when breakpoint
4570 becomes enabled, or the duplicate is removed, gdb will try to insert
4571 all breakpoints. If we don't set shlib_disabled here, we'll try
4572 to insert those breakpoints and fail. */
4573 if (((b->type == bp_breakpoint)
4574 || (b->type == bp_hardware_breakpoint)
4575 || (b->type == bp_tracepoint))
4576 && !loc->shlib_disabled
4578 && PC_SOLIB (loc->address)
4580 && solib_name_from_address (loc->address)
4584 loc->shlib_disabled = 1;
4589 /* Disable any breakpoints that are in in an unloaded shared library. Only
4590 apply to enabled breakpoints, disabled ones can just stay disabled. */
4593 disable_breakpoints_in_unloaded_shlib (struct so_list *solib)
4595 struct bp_location *loc;
4596 int disabled_shlib_breaks = 0;
4598 /* SunOS a.out shared libraries are always mapped, so do not
4599 disable breakpoints; they will only be reported as unloaded
4600 through clear_solib when GDB discards its shared library
4601 list. See clear_solib for more information. */
4602 if (exec_bfd != NULL
4603 && bfd_get_flavour (exec_bfd) == bfd_target_aout_flavour)
4606 ALL_BP_LOCATIONS (loc)
4608 struct breakpoint *b = loc->owner;
4609 if ((loc->loc_type == bp_loc_hardware_breakpoint
4610 || loc->loc_type == bp_loc_software_breakpoint)
4611 && !loc->shlib_disabled
4612 && (b->type == bp_breakpoint || b->type == bp_hardware_breakpoint)
4613 && solib_contains_address_p (solib, loc->address))
4615 loc->shlib_disabled = 1;
4616 /* At this point, we cannot rely on remove_breakpoint
4617 succeeding so we must mark the breakpoint as not inserted
4618 to prevent future errors occurring in remove_breakpoints. */
4620 if (!disabled_shlib_breaks)
4622 target_terminal_ours_for_output ();
4623 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4626 disabled_shlib_breaks = 1;
4631 /* FORK & VFORK catchpoints. */
4633 /* Implement the "insert" breakpoint_ops method for fork catchpoints. */
4636 insert_catch_fork (struct breakpoint *b)
4638 target_insert_fork_catchpoint (PIDGET (inferior_ptid));
4641 /* Implement the "remove" breakpoint_ops method for fork catchpoints. */
4644 remove_catch_fork (struct breakpoint *b)
4646 return target_remove_fork_catchpoint (PIDGET (inferior_ptid));
4649 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
4653 breakpoint_hit_catch_fork (struct breakpoint *b)
4655 return inferior_has_forked (inferior_ptid, &b->forked_inferior_pid);
4658 /* Implement the "print_it" breakpoint_ops method for fork catchpoints. */
4660 static enum print_stop_action
4661 print_it_catch_fork (struct breakpoint *b)
4663 annotate_catchpoint (b->number);
4664 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
4665 b->number, ptid_get_pid (b->forked_inferior_pid));
4666 return PRINT_SRC_AND_LOC;
4669 /* Implement the "print_one" breakpoint_ops method for fork catchpoints. */
4672 print_one_catch_fork (struct breakpoint *b, CORE_ADDR *last_addr)
4674 struct value_print_options opts;
4676 get_user_print_options (&opts);
4678 /* Field 4, the address, is omitted (which makes the columns
4679 not line up too nicely with the headers, but the effect
4680 is relatively readable). */
4681 if (opts.addressprint)
4682 ui_out_field_skip (uiout, "addr");
4684 ui_out_text (uiout, "fork");
4685 if (!ptid_equal (b->forked_inferior_pid, null_ptid))
4687 ui_out_text (uiout, ", process ");
4688 ui_out_field_int (uiout, "what",
4689 ptid_get_pid (b->forked_inferior_pid));
4690 ui_out_spaces (uiout, 1);
4694 /* Implement the "print_mention" breakpoint_ops method for fork
4698 print_mention_catch_fork (struct breakpoint *b)
4700 printf_filtered (_("Catchpoint %d (fork)"), b->number);
4703 /* The breakpoint_ops structure to be used in fork catchpoints. */
4705 static struct breakpoint_ops catch_fork_breakpoint_ops =
4709 breakpoint_hit_catch_fork,
4710 print_it_catch_fork,
4711 print_one_catch_fork,
4712 print_mention_catch_fork
4715 /* Implement the "insert" breakpoint_ops method for vfork catchpoints. */
4718 insert_catch_vfork (struct breakpoint *b)
4720 target_insert_vfork_catchpoint (PIDGET (inferior_ptid));
4723 /* Implement the "remove" breakpoint_ops method for vfork catchpoints. */
4726 remove_catch_vfork (struct breakpoint *b)
4728 return target_remove_vfork_catchpoint (PIDGET (inferior_ptid));
4731 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
4735 breakpoint_hit_catch_vfork (struct breakpoint *b)
4737 return inferior_has_vforked (inferior_ptid, &b->forked_inferior_pid);
4740 /* Implement the "print_it" breakpoint_ops method for vfork catchpoints. */
4742 static enum print_stop_action
4743 print_it_catch_vfork (struct breakpoint *b)
4745 annotate_catchpoint (b->number);
4746 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
4747 b->number, ptid_get_pid (b->forked_inferior_pid));
4748 return PRINT_SRC_AND_LOC;
4751 /* Implement the "print_one" breakpoint_ops method for vfork catchpoints. */
4754 print_one_catch_vfork (struct breakpoint *b, CORE_ADDR *last_addr)
4756 struct value_print_options opts;
4758 get_user_print_options (&opts);
4759 /* Field 4, the address, is omitted (which makes the columns
4760 not line up too nicely with the headers, but the effect
4761 is relatively readable). */
4762 if (opts.addressprint)
4763 ui_out_field_skip (uiout, "addr");
4765 ui_out_text (uiout, "vfork");
4766 if (!ptid_equal (b->forked_inferior_pid, null_ptid))
4768 ui_out_text (uiout, ", process ");
4769 ui_out_field_int (uiout, "what",
4770 ptid_get_pid (b->forked_inferior_pid));
4771 ui_out_spaces (uiout, 1);
4775 /* Implement the "print_mention" breakpoint_ops method for vfork
4779 print_mention_catch_vfork (struct breakpoint *b)
4781 printf_filtered (_("Catchpoint %d (vfork)"), b->number);
4784 /* The breakpoint_ops structure to be used in vfork catchpoints. */
4786 static struct breakpoint_ops catch_vfork_breakpoint_ops =
4790 breakpoint_hit_catch_vfork,
4791 print_it_catch_vfork,
4792 print_one_catch_vfork,
4793 print_mention_catch_vfork
4796 /* Create a new breakpoint of the bp_catchpoint kind and return it.
4798 If TEMPFLAG is non-zero, then make the breakpoint temporary.
4799 If COND_STRING is not NULL, then store it in the breakpoint.
4800 OPS, if not NULL, is the breakpoint_ops structure associated
4801 to the catchpoint. */
4803 static struct breakpoint *
4804 create_catchpoint (int tempflag, char *cond_string,
4805 struct breakpoint_ops *ops)
4807 struct symtab_and_line sal;
4808 struct breakpoint *b;
4815 b = set_raw_breakpoint (sal, bp_catchpoint);
4816 set_breakpoint_count (breakpoint_count + 1);
4817 b->number = breakpoint_count;
4819 b->cond_string = (cond_string == NULL) ?
4820 NULL : savestring (cond_string, strlen (cond_string));
4822 b->addr_string = NULL;
4823 b->enable_state = bp_enabled;
4824 b->disposition = tempflag ? disp_del : disp_donttouch;
4828 update_global_location_list (1);
4834 create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
4835 struct breakpoint_ops *ops)
4837 struct breakpoint *b = create_catchpoint (tempflag, cond_string, ops);
4839 /* FIXME: We should put this information in a breakpoint private data
4841 b->forked_inferior_pid = null_ptid;
4844 /* Exec catchpoints. */
4847 insert_catch_exec (struct breakpoint *b)
4849 target_insert_exec_catchpoint (PIDGET (inferior_ptid));
4853 remove_catch_exec (struct breakpoint *b)
4855 return target_remove_exec_catchpoint (PIDGET (inferior_ptid));
4859 breakpoint_hit_catch_exec (struct breakpoint *b)
4861 return inferior_has_execd (inferior_ptid, &b->exec_pathname);
4864 static enum print_stop_action
4865 print_it_catch_exec (struct breakpoint *b)
4867 annotate_catchpoint (b->number);
4868 printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b->number,
4870 return PRINT_SRC_AND_LOC;
4874 print_one_catch_exec (struct breakpoint *b, CORE_ADDR *last_addr)
4876 struct value_print_options opts;
4878 get_user_print_options (&opts);
4880 /* Field 4, the address, is omitted (which makes the columns
4881 not line up too nicely with the headers, but the effect
4882 is relatively readable). */
4883 if (opts.addressprint)
4884 ui_out_field_skip (uiout, "addr");
4886 ui_out_text (uiout, "exec");
4887 if (b->exec_pathname != NULL)
4889 ui_out_text (uiout, ", program \"");
4890 ui_out_field_string (uiout, "what", b->exec_pathname);
4891 ui_out_text (uiout, "\" ");
4896 print_mention_catch_exec (struct breakpoint *b)
4898 printf_filtered (_("Catchpoint %d (exec)"), b->number);
4901 static struct breakpoint_ops catch_exec_breakpoint_ops =
4905 breakpoint_hit_catch_exec,
4906 print_it_catch_exec,
4907 print_one_catch_exec,
4908 print_mention_catch_exec
4912 hw_breakpoint_used_count (void)
4914 struct breakpoint *b;
4919 if (b->type == bp_hardware_breakpoint && breakpoint_enabled (b))
4927 hw_watchpoint_used_count (enum bptype type, int *other_type_used)
4929 struct breakpoint *b;
4932 *other_type_used = 0;
4935 if (breakpoint_enabled (b))
4937 if (b->type == type)
4939 else if ((b->type == bp_hardware_watchpoint ||
4940 b->type == bp_read_watchpoint ||
4941 b->type == bp_access_watchpoint))
4942 *other_type_used = 1;
4949 disable_watchpoints_before_interactive_call_start (void)
4951 struct breakpoint *b;
4955 if (((b->type == bp_watchpoint)
4956 || (b->type == bp_hardware_watchpoint)
4957 || (b->type == bp_read_watchpoint)
4958 || (b->type == bp_access_watchpoint))
4959 && breakpoint_enabled (b))
4961 b->enable_state = bp_call_disabled;
4962 update_global_location_list (0);
4968 enable_watchpoints_after_interactive_call_stop (void)
4970 struct breakpoint *b;
4974 if (((b->type == bp_watchpoint)
4975 || (b->type == bp_hardware_watchpoint)
4976 || (b->type == bp_read_watchpoint)
4977 || (b->type == bp_access_watchpoint))
4978 && (b->enable_state == bp_call_disabled))
4980 b->enable_state = bp_enabled;
4981 update_global_location_list (1);
4987 /* Set a breakpoint that will evaporate an end of command
4988 at address specified by SAL.
4989 Restrict it to frame FRAME if FRAME is nonzero. */
4992 set_momentary_breakpoint (struct symtab_and_line sal, struct frame_id frame_id,
4995 struct breakpoint *b;
4996 b = set_raw_breakpoint (sal, type);
4997 b->enable_state = bp_enabled;
4998 b->disposition = disp_donttouch;
4999 b->frame_id = frame_id;
5001 /* If we're debugging a multi-threaded program, then we
5002 want momentary breakpoints to be active in only a
5003 single thread of control. */
5004 if (in_thread_list (inferior_ptid))
5005 b->thread = pid_to_thread_id (inferior_ptid);
5007 update_global_location_list_nothrow (1);
5013 set_momentary_breakpoint_at_pc (CORE_ADDR pc, enum bptype type)
5015 struct symtab_and_line sal;
5017 sal = find_pc_line (pc, 0);
5019 sal.section = find_pc_overlay (pc);
5020 sal.explicit_pc = 1;
5022 return set_momentary_breakpoint (sal, null_frame_id, type);
5026 /* Tell the user we have just set a breakpoint B. */
5029 mention (struct breakpoint *b)
5032 struct cleanup *ui_out_chain;
5033 struct value_print_options opts;
5035 get_user_print_options (&opts);
5037 /* FIXME: This is misplaced; mention() is called by things (like
5038 hitting a watchpoint) other than breakpoint creation. It should
5039 be possible to clean this up and at the same time replace the
5040 random calls to breakpoint_changed with this hook. */
5041 observer_notify_breakpoint_created (b->number);
5043 if (b->ops != NULL && b->ops->print_mention != NULL)
5044 b->ops->print_mention (b);
5049 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b->number);
5052 ui_out_text (uiout, "Watchpoint ");
5053 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt");
5054 ui_out_field_int (uiout, "number", b->number);
5055 ui_out_text (uiout, ": ");
5056 ui_out_field_string (uiout, "exp", b->exp_string);
5057 do_cleanups (ui_out_chain);
5059 case bp_hardware_watchpoint:
5060 ui_out_text (uiout, "Hardware watchpoint ");
5061 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt");
5062 ui_out_field_int (uiout, "number", b->number);
5063 ui_out_text (uiout, ": ");
5064 ui_out_field_string (uiout, "exp", b->exp_string);
5065 do_cleanups (ui_out_chain);
5067 case bp_read_watchpoint:
5068 ui_out_text (uiout, "Hardware read watchpoint ");
5069 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-rwpt");
5070 ui_out_field_int (uiout, "number", b->number);
5071 ui_out_text (uiout, ": ");
5072 ui_out_field_string (uiout, "exp", b->exp_string);
5073 do_cleanups (ui_out_chain);
5075 case bp_access_watchpoint:
5076 ui_out_text (uiout, "Hardware access (read/write) watchpoint ");
5077 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-awpt");
5078 ui_out_field_int (uiout, "number", b->number);
5079 ui_out_text (uiout, ": ");
5080 ui_out_field_string (uiout, "exp", b->exp_string);
5081 do_cleanups (ui_out_chain);
5084 if (ui_out_is_mi_like_p (uiout))
5089 if (b->disposition == disp_del)
5090 printf_filtered (_("Temporary breakpoint"));
5092 printf_filtered (_("Breakpoint"));
5093 printf_filtered (_(" %d"), b->number);
5096 case bp_hardware_breakpoint:
5097 if (ui_out_is_mi_like_p (uiout))
5102 printf_filtered (_("Hardware assisted breakpoint %d"), b->number);
5106 if (ui_out_is_mi_like_p (uiout))
5111 printf_filtered (_("Tracepoint"));
5112 printf_filtered (_(" %d"), b->number);
5119 case bp_longjmp_resume:
5120 case bp_step_resume:
5122 case bp_watchpoint_scope:
5123 case bp_shlib_event:
5124 case bp_thread_event:
5125 case bp_overlay_event:
5131 /* i18n: cagney/2005-02-11: Below needs to be merged into a
5135 printf_filtered (_(" (%s) pending."), b->addr_string);
5139 if (opts.addressprint || b->source_file == NULL)
5141 printf_filtered (" at ");
5142 fputs_filtered (paddress (b->loc->address), gdb_stdout);
5145 printf_filtered (": file %s, line %d.",
5146 b->source_file, b->line_number);
5150 struct bp_location *loc = b->loc;
5152 for (; loc; loc = loc->next)
5154 printf_filtered (" (%d locations)", n);
5159 if (ui_out_is_mi_like_p (uiout))
5161 printf_filtered ("\n");
5165 static struct bp_location *
5166 add_location_to_breakpoint (struct breakpoint *b,
5167 const struct symtab_and_line *sal)
5169 struct bp_location *loc, **tmp;
5171 loc = allocate_bp_location (b);
5172 for (tmp = &(b->loc); *tmp != NULL; tmp = &((*tmp)->next))
5175 loc->requested_address = sal->pc;
5176 loc->address = adjust_breakpoint_address (loc->requested_address, b->type);
5177 loc->section = sal->section;
5179 set_breakpoint_location_function (loc);
5184 /* Return 1 if LOC is pointing to a permanent breakpoint,
5185 return 0 otherwise. */
5188 bp_loc_is_permanent (struct bp_location *loc)
5192 const gdb_byte *brk;
5193 gdb_byte *target_mem;
5194 struct cleanup *cleanup;
5197 gdb_assert (loc != NULL);
5199 addr = loc->address;
5200 brk = gdbarch_breakpoint_from_pc (current_gdbarch, &addr, &len);
5202 /* Software breakpoints unsupported? */
5206 target_mem = alloca (len);
5208 /* Enable the automatic memory restoration from breakpoints while
5209 we read the memory. Otherwise we could say about our temporary
5210 breakpoints they are permanent. */
5211 cleanup = make_show_memory_breakpoints_cleanup (0);
5213 if (target_read_memory (loc->address, target_mem, len) == 0
5214 && memcmp (target_mem, brk, len) == 0)
5217 do_cleanups (cleanup);
5224 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5225 as textual description of the location, and COND_STRING
5226 as condition expression. */
5229 create_breakpoint (struct symtabs_and_lines sals, char *addr_string,
5231 enum bptype type, enum bpdisp disposition,
5232 int thread, int task, int ignore_count,
5233 struct breakpoint_ops *ops, int from_tty, int enabled)
5235 struct breakpoint *b = NULL;
5238 if (type == bp_hardware_breakpoint)
5240 int i = hw_breakpoint_used_count ();
5241 int target_resources_ok =
5242 target_can_use_hardware_watchpoint (bp_hardware_breakpoint,
5244 if (target_resources_ok == 0)
5245 error (_("No hardware breakpoint support in the target."));
5246 else if (target_resources_ok < 0)
5247 error (_("Hardware breakpoints used exceeds limit."));
5250 for (i = 0; i < sals.nelts; ++i)
5252 struct symtab_and_line sal = sals.sals[i];
5253 struct bp_location *loc;
5256 describe_other_breakpoints (sal.pc, sal.section, thread);
5260 b = set_raw_breakpoint (sal, type);
5261 set_breakpoint_count (breakpoint_count + 1);
5262 b->number = breakpoint_count;
5266 b->cond_string = cond_string;
5267 b->ignore_count = ignore_count;
5268 b->enable_state = enabled ? bp_enabled : bp_disabled;
5269 b->disposition = disposition;
5275 loc = add_location_to_breakpoint (b, &sal);
5278 if (bp_loc_is_permanent (loc))
5279 make_breakpoint_permanent (b);
5283 char *arg = b->cond_string;
5284 loc->cond = parse_exp_1 (&arg, block_for_pc (loc->address), 0);
5286 error (_("Garbage %s follows condition"), arg);
5291 b->addr_string = addr_string;
5293 /* addr_string has to be used or breakpoint_re_set will delete
5295 b->addr_string = xstrprintf ("*0x%s", paddr (b->loc->address));
5301 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5302 elements to fill the void space. */
5304 remove_sal (struct symtabs_and_lines *sal, int index_to_remove)
5306 int i = index_to_remove+1;
5307 int last_index = sal->nelts-1;
5309 for (;i <= last_index; ++i)
5310 sal->sals[i-1] = sal->sals[i];
5315 /* If appropriate, obtains all sals that correspond
5316 to the same file and line as SAL. This is done
5317 only if SAL does not have explicit PC and has
5318 line and file information. If we got just a single
5319 expanded sal, return the original.
5321 Otherwise, if SAL.explicit_line is not set, filter out
5322 all sals for which the name of enclosing function
5323 is different from SAL. This makes sure that if we have
5324 breakpoint originally set in template instantiation, say
5325 foo<int>(), we won't expand SAL to locations at the same
5326 line in all existing instantiations of 'foo'.
5329 static struct symtabs_and_lines
5330 expand_line_sal_maybe (struct symtab_and_line sal)
5332 struct symtabs_and_lines expanded;
5333 CORE_ADDR original_pc = sal.pc;
5334 char *original_function = NULL;
5338 /* If we have explicit pc, don't expand.
5339 If we have no line number, we can't expand. */
5340 if (sal.explicit_pc || sal.line == 0 || sal.symtab == NULL)
5343 expanded.sals = xmalloc (sizeof (struct symtab_and_line));
5344 expanded.sals[0] = sal;
5349 find_pc_partial_function (original_pc, &original_function, NULL, NULL);
5351 expanded = expand_line_sal (sal);
5352 if (expanded.nelts == 1)
5354 /* We had one sal, we got one sal. Without futher
5355 processing, just return the original sal. */
5356 xfree (expanded.sals);
5358 expanded.sals = xmalloc (sizeof (struct symtab_and_line));
5359 sal.pc = original_pc;
5360 expanded.sals[0] = sal;
5364 if (!sal.explicit_line)
5366 CORE_ADDR func_addr, func_end;
5367 for (i = 0; i < expanded.nelts; ++i)
5369 CORE_ADDR pc = expanded.sals[i].pc;
5370 char *this_function;
5371 if (find_pc_partial_function (pc, &this_function,
5372 &func_addr, &func_end))
5374 if (this_function &&
5375 strcmp (this_function, original_function) != 0)
5377 remove_sal (&expanded, i);
5380 else if (func_addr == pc)
5382 /* We're at beginning of a function, and should
5384 struct symbol *sym = find_pc_function (pc);
5386 expanded.sals[i] = find_function_start_sal (sym, 1);
5389 = gdbarch_skip_prologue (current_gdbarch, pc);
5396 if (expanded.nelts <= 1)
5398 /* This is un ugly workaround. If we get zero
5399 expanded sals then something is really wrong.
5400 Fix that by returnign the original sal. */
5401 xfree (expanded.sals);
5403 expanded.sals = xmalloc (sizeof (struct symtab_and_line));
5404 sal.pc = original_pc;
5405 expanded.sals[0] = sal;
5412 for (i = 0; i < expanded.nelts; ++i)
5413 if (expanded.sals[i].pc == original_pc)
5424 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5425 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5426 value. COND_STRING, if not NULL, specified the condition to be
5427 used for all breakpoints. Essentially the only case where
5428 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5429 function. In that case, it's still not possible to specify
5430 separate conditions for different overloaded functions, so
5431 we take just a single condition string.
5433 NOTE: If the function succeeds, the caller is expected to cleanup
5434 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5435 array contents). If the function fails (error() is called), the
5436 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5437 COND and SALS arrays and each of those arrays contents. */
5440 create_breakpoints (struct symtabs_and_lines sals, char **addr_string,
5442 enum bptype type, enum bpdisp disposition,
5443 int thread, int task, int ignore_count,
5444 struct breakpoint_ops *ops, int from_tty,
5448 for (i = 0; i < sals.nelts; ++i)
5450 struct symtabs_and_lines expanded =
5451 expand_line_sal_maybe (sals.sals[i]);
5453 create_breakpoint (expanded, addr_string[i],
5454 cond_string, type, disposition,
5455 thread, task, ignore_count, ops, from_tty, enabled);
5459 /* Parse ARG which is assumed to be a SAL specification possibly
5460 followed by conditionals. On return, SALS contains an array of SAL
5461 addresses found. ADDR_STRING contains a vector of (canonical)
5462 address strings. ARG points to the end of the SAL. */
5465 parse_breakpoint_sals (char **address,
5466 struct symtabs_and_lines *sals,
5467 char ***addr_string,
5470 char *addr_start = *address;
5471 *addr_string = NULL;
5472 /* If no arg given, or if first arg is 'if ', use the default
5474 if ((*address) == NULL
5475 || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2])))
5477 if (default_breakpoint_valid)
5479 struct symtab_and_line sal;
5480 init_sal (&sal); /* initialize to zeroes */
5481 sals->sals = (struct symtab_and_line *)
5482 xmalloc (sizeof (struct symtab_and_line));
5483 sal.pc = default_breakpoint_address;
5484 sal.line = default_breakpoint_line;
5485 sal.symtab = default_breakpoint_symtab;
5486 sal.section = find_pc_overlay (sal.pc);
5488 /* "break" without arguments is equivalent to "break *PC" where PC is
5489 the default_breakpoint_address. So make sure to set
5490 sal.explicit_pc to prevent GDB from trying to expand the list of
5491 sals to include all other instances with the same symtab and line.
5493 sal.explicit_pc = 1;
5495 sals->sals[0] = sal;
5499 error (_("No default breakpoint address now."));
5503 /* Force almost all breakpoints to be in terms of the
5504 current_source_symtab (which is decode_line_1's default). This
5505 should produce the results we want almost all of the time while
5506 leaving default_breakpoint_* alone.
5507 ObjC: However, don't match an Objective-C method name which
5508 may have a '+' or '-' succeeded by a '[' */
5510 struct symtab_and_line cursal = get_current_source_symtab_and_line ();
5512 if (default_breakpoint_valid
5514 || ((strchr ("+-", (*address)[0]) != NULL)
5515 && ((*address)[1] != '['))))
5516 *sals = decode_line_1 (address, 1, default_breakpoint_symtab,
5517 default_breakpoint_line, addr_string,
5520 *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0,
5521 addr_string, not_found_ptr);
5523 /* For any SAL that didn't have a canonical string, fill one in. */
5524 if (sals->nelts > 0 && *addr_string == NULL)
5525 *addr_string = xcalloc (sals->nelts, sizeof (char **));
5526 if (addr_start != (*address))
5529 for (i = 0; i < sals->nelts; i++)
5531 /* Add the string if not present. */
5532 if ((*addr_string)[i] == NULL)
5533 (*addr_string)[i] = savestring (addr_start, (*address) - addr_start);
5539 /* Convert each SAL into a real PC. Verify that the PC can be
5540 inserted as a breakpoint. If it can't throw an error. */
5543 breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
5547 for (i = 0; i < sals->nelts; i++)
5548 resolve_sal_pc (&sals->sals[i]);
5552 do_captured_parse_breakpoint (struct ui_out *ui, void *data)
5554 struct captured_parse_breakpoint_args *args = data;
5556 parse_breakpoint_sals (args->arg_p, args->sals_p, args->addr_string_p,
5557 args->not_found_ptr);
5560 /* Given TOK, a string specification of condition and thread, as
5561 accepted by the 'break' command, extract the condition
5562 string and thread number and set *COND_STRING and *THREAD.
5563 PC identifies the context at which the condition should be parsed.
5564 If no condition is found, *COND_STRING is set to NULL.
5565 If no thread is found, *THREAD is set to -1. */
5567 find_condition_and_thread (char *tok, CORE_ADDR pc,
5568 char **cond_string, int *thread, int *task)
5570 *cond_string = NULL;
5576 char *cond_start = NULL;
5577 char *cond_end = NULL;
5578 while (*tok == ' ' || *tok == '\t')
5583 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
5586 toklen = end_tok - tok;
5588 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
5590 struct expression *expr;
5592 tok = cond_start = end_tok + 1;
5593 expr = parse_exp_1 (&tok, block_for_pc (pc), 0);
5596 *cond_string = savestring (cond_start,
5597 cond_end - cond_start);
5599 else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
5605 *thread = strtol (tok, &tok, 0);
5607 error (_("Junk after thread keyword."));
5608 if (!valid_thread_id (*thread))
5609 error (_("Unknown thread %d."), *thread);
5611 else if (toklen >= 1 && strncmp (tok, "task", toklen) == 0)
5617 *task = strtol (tok, &tok, 0);
5619 error (_("Junk after task keyword."));
5620 if (!valid_task_id (*task))
5621 error (_("Unknown task %d\n"), *task);
5624 error (_("Junk at end of arguments."));
5628 /* Set a breakpoint. This function is shared between
5629 CLI and MI functions for setting a breakpoint.
5630 This function has two major modes of operations,
5631 selected by the PARSE_CONDITION_AND_THREAD parameter.
5632 If non-zero, the function will parse arg, extracting
5633 breakpoint location, address and thread. Otherwise,
5634 ARG is just the location of breakpoint, with condition
5635 and thread specified by the COND_STRING and THREAD
5639 break_command_really (char *arg, char *cond_string, int thread,
5640 int parse_condition_and_thread,
5641 int tempflag, int hardwareflag, int traceflag,
5643 enum auto_boolean pending_break_support,
5644 struct breakpoint_ops *ops,
5648 struct gdb_exception e;
5649 struct symtabs_and_lines sals;
5650 struct symtab_and_line pending_sal;
5653 char *addr_start = arg;
5655 struct cleanup *old_chain;
5656 struct cleanup *breakpoint_chain = NULL;
5657 struct captured_parse_breakpoint_args parse_args;
5661 enum bptype type_wanted;
5668 parse_args.arg_p = &arg;
5669 parse_args.sals_p = &sals;
5670 parse_args.addr_string_p = &addr_string;
5671 parse_args.not_found_ptr = ¬_found;
5673 e = catch_exception (uiout, do_captured_parse_breakpoint,
5674 &parse_args, RETURN_MASK_ALL);
5676 /* If caller is interested in rc value from parse, set value. */
5680 throw_exception (e);
5684 case NOT_FOUND_ERROR:
5686 /* If pending breakpoint support is turned off, throw
5689 if (pending_break_support == AUTO_BOOLEAN_FALSE)
5690 throw_exception (e);
5692 exception_print (gdb_stderr, e);
5694 /* If pending breakpoint support is auto query and the user
5695 selects no, then simply return the error code. */
5696 if (pending_break_support == AUTO_BOOLEAN_AUTO &&
5697 !nquery ("Make breakpoint pending on future shared library load? "))
5700 /* At this point, either the user was queried about setting
5701 a pending breakpoint and selected yes, or pending
5702 breakpoint behavior is on and thus a pending breakpoint
5703 is defaulted on behalf of the user. */
5704 copy_arg = xstrdup (addr_start);
5705 addr_string = ©_arg;
5707 sals.sals = &pending_sal;
5712 throw_exception (e);
5719 /* Create a chain of things that always need to be cleaned up. */
5720 old_chain = make_cleanup (null_cleanup, 0);
5724 /* Make sure that all storage allocated to SALS gets freed. */
5725 make_cleanup (xfree, sals.sals);
5727 /* Cleanup the addr_string array but not its contents. */
5728 make_cleanup (xfree, addr_string);
5731 /* ----------------------------- SNIP -----------------------------
5732 Anything added to the cleanup chain beyond this point is assumed
5733 to be part of a breakpoint. If the breakpoint create succeeds
5734 then the memory is not reclaimed. */
5735 breakpoint_chain = make_cleanup (null_cleanup, 0);
5737 /* Mark the contents of the addr_string for cleanup. These go on
5738 the breakpoint_chain and only occure if the breakpoint create
5740 for (i = 0; i < sals.nelts; i++)
5742 if (addr_string[i] != NULL)
5743 make_cleanup (xfree, addr_string[i]);
5746 /* Resolve all line numbers to PC's and verify that the addresses
5747 are ok for the target. */
5749 breakpoint_sals_to_pc (&sals, addr_start);
5751 type_wanted = (traceflag
5753 : (hardwareflag ? bp_hardware_breakpoint : bp_breakpoint));
5755 /* Verify that condition can be parsed, before setting any
5756 breakpoints. Allocate a separate condition expression for each
5760 if (parse_condition_and_thread)
5762 /* Here we only parse 'arg' to separate condition
5763 from thread number, so parsing in context of first
5764 sal is OK. When setting the breakpoint we'll
5765 re-parse it in context of each sal. */
5768 find_condition_and_thread (arg, sals.sals[0].pc, &cond_string,
5771 make_cleanup (xfree, cond_string);
5775 /* Create a private copy of condition string. */
5778 cond_string = xstrdup (cond_string);
5779 make_cleanup (xfree, cond_string);
5782 create_breakpoints (sals, addr_string, cond_string, type_wanted,
5783 tempflag ? disp_del : disp_donttouch,
5784 thread, task, ignore_count, ops, from_tty, enabled);
5788 struct symtab_and_line sal = {0};
5789 struct breakpoint *b;
5791 make_cleanup (xfree, copy_arg);
5793 b = set_raw_breakpoint_without_location (type_wanted);
5794 set_breakpoint_count (breakpoint_count + 1);
5795 b->number = breakpoint_count;
5797 b->addr_string = addr_string[0];
5798 b->cond_string = NULL;
5799 b->ignore_count = ignore_count;
5800 b->disposition = tempflag ? disp_del : disp_donttouch;
5801 b->condition_not_parsed = 1;
5803 b->enable_state = enabled ? bp_enabled : bp_disabled;
5809 warning (_("Multiple breakpoints were set.\n"
5810 "Use the \"delete\" command to delete unwanted breakpoints."));
5811 /* That's it. Discard the cleanups for data inserted into the
5813 discard_cleanups (breakpoint_chain);
5814 /* But cleanup everything else. */
5815 do_cleanups (old_chain);
5817 /* error call may happen here - have BREAKPOINT_CHAIN already discarded. */
5818 update_global_location_list (1);
5821 /* Set a breakpoint.
5822 ARG is a string describing breakpoint address,
5823 condition, and thread.
5824 FLAG specifies if a breakpoint is hardware on,
5825 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5829 break_command_1 (char *arg, int flag, int from_tty)
5831 int hardwareflag = flag & BP_HARDWAREFLAG;
5832 int tempflag = flag & BP_TEMPFLAG;
5834 break_command_really (arg,
5835 NULL, 0, 1 /* parse arg */,
5836 tempflag, hardwareflag, 0 /* traceflag */,
5837 0 /* Ignore count */,
5838 pending_break_support,
5839 NULL /* breakpoint_ops */,
5846 set_breakpoint (char *address, char *condition,
5847 int hardwareflag, int tempflag,
5848 int thread, int ignore_count,
5849 int pending, int enabled)
5851 break_command_really (address, condition, thread,
5852 0 /* condition and thread are valid. */,
5853 tempflag, hardwareflag, 0 /* traceflag */,
5856 ? AUTO_BOOLEAN_TRUE : AUTO_BOOLEAN_FALSE,
5860 /* Adjust SAL to the first instruction past the function prologue.
5861 The end of the prologue is determined using the line table from
5862 the debugging information.
5864 If SAL is already past the prologue, then do nothing. */
5867 skip_prologue_sal (struct symtab_and_line *sal)
5869 struct symbol *sym = find_pc_function (sal->pc);
5870 struct symtab_and_line start_sal;
5875 start_sal = find_function_start_sal (sym, 1);
5876 if (sal->pc < start_sal.pc)
5880 /* Helper function for break_command_1 and disassemble_command. */
5883 resolve_sal_pc (struct symtab_and_line *sal)
5887 if (sal->pc == 0 && sal->symtab != NULL)
5889 if (!find_line_pc (sal->symtab, sal->line, &pc))
5890 error (_("No line %d in file \"%s\"."),
5891 sal->line, sal->symtab->filename);
5894 /* If this SAL corresponds to a breakpoint inserted using
5895 a line number, then skip the function prologue if necessary. */
5896 if (sal->explicit_line)
5898 /* Preserve the original line number. */
5899 int saved_line = sal->line;
5900 skip_prologue_sal (sal);
5901 sal->line = saved_line;
5905 if (sal->section == 0 && sal->symtab != NULL)
5907 struct blockvector *bv;
5911 bv = blockvector_for_pc_sect (sal->pc, 0, &b, sal->symtab);
5914 sym = block_linkage_function (b);
5917 fixup_symbol_section (sym, sal->symtab->objfile);
5918 sal->section = SYMBOL_OBJ_SECTION (sym);
5922 /* It really is worthwhile to have the section, so we'll just
5923 have to look harder. This case can be executed if we have
5924 line numbers but no functions (as can happen in assembly
5927 struct minimal_symbol *msym;
5929 msym = lookup_minimal_symbol_by_pc (sal->pc);
5931 sal->section = SYMBOL_OBJ_SECTION (msym);
5938 break_command (char *arg, int from_tty)
5940 break_command_1 (arg, 0, from_tty);
5944 tbreak_command (char *arg, int from_tty)
5946 break_command_1 (arg, BP_TEMPFLAG, from_tty);
5950 hbreak_command (char *arg, int from_tty)
5952 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
5956 thbreak_command (char *arg, int from_tty)
5958 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
5962 stop_command (char *arg, int from_tty)
5964 printf_filtered (_("Specify the type of breakpoint to set.\n\
5965 Usage: stop in <function | address>\n\
5966 stop at <line>\n"));
5970 stopin_command (char *arg, int from_tty)
5974 if (arg == (char *) NULL)
5976 else if (*arg != '*')
5981 /* look for a ':'. If this is a line number specification, then
5982 say it is bad, otherwise, it should be an address or
5983 function/method name */
5984 while (*argptr && !hasColon)
5986 hasColon = (*argptr == ':');
5991 badInput = (*argptr != ':'); /* Not a class::method */
5993 badInput = isdigit (*arg); /* a simple line number */
5997 printf_filtered (_("Usage: stop in <function | address>\n"));
5999 break_command_1 (arg, 0, from_tty);
6003 stopat_command (char *arg, int from_tty)
6007 if (arg == (char *) NULL || *arg == '*') /* no line number */
6014 /* look for a ':'. If there is a '::' then get out, otherwise
6015 it is probably a line number. */
6016 while (*argptr && !hasColon)
6018 hasColon = (*argptr == ':');
6023 badInput = (*argptr == ':'); /* we have class::method */
6025 badInput = !isdigit (*arg); /* not a line number */
6029 printf_filtered (_("Usage: stop at <line>\n"));
6031 break_command_1 (arg, 0, from_tty);
6034 /* accessflag: hw_write: watch write,
6035 hw_read: watch read,
6036 hw_access: watch access (read or write) */
6038 watch_command_1 (char *arg, int accessflag, int from_tty)
6040 struct breakpoint *b, *scope_breakpoint = NULL;
6041 struct symtab_and_line sal;
6042 struct expression *exp;
6043 struct block *exp_valid_block;
6044 struct value *val, *mark;
6045 struct frame_info *frame;
6046 struct frame_info *prev_frame = NULL;
6047 char *exp_start = NULL;
6048 char *exp_end = NULL;
6049 char *tok, *id_tok_start, *end_tok;
6051 char *cond_start = NULL;
6052 char *cond_end = NULL;
6053 struct expression *cond = NULL;
6054 int i, other_type_used, target_resources_ok = 0;
6055 enum bptype bp_type;
6059 init_sal (&sal); /* initialize to zeroes */
6061 /* Make sure that we actually have parameters to parse. */
6062 if (arg != NULL && arg[0] != '\0')
6064 toklen = strlen (arg); /* Size of argument list. */
6066 /* Points tok to the end of the argument list. */
6067 tok = arg + toklen - 1;
6069 /* Go backwards in the parameters list. Skip the last parameter.
6070 If we're expecting a 'thread <thread_num>' parameter, this should
6071 be the thread identifier. */
6072 while (tok > arg && (*tok == ' ' || *tok == '\t'))
6074 while (tok > arg && (*tok != ' ' && *tok != '\t'))
6077 /* Points end_tok to the beginning of the last token. */
6078 id_tok_start = tok + 1;
6080 /* Go backwards in the parameters list. Skip one more parameter.
6081 If we're expecting a 'thread <thread_num>' parameter, we should
6082 reach a "thread" token. */
6083 while (tok > arg && (*tok == ' ' || *tok == '\t'))
6088 while (tok > arg && (*tok != ' ' && *tok != '\t'))
6091 /* Move the pointer forward to skip the whitespace and
6092 calculate the length of the token. */
6094 toklen = end_tok - tok;
6096 if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
6098 /* At this point we've found a "thread" token, which means
6099 the user is trying to set a watchpoint that triggers
6100 only in a specific thread. */
6103 /* Extract the thread ID from the next token. */
6104 thread = strtol (id_tok_start, &endp, 0);
6106 /* Check if the user provided a valid numeric value for the
6108 if (*endp != ' ' && *endp != '\t' && *endp != '\0')
6109 error (_("Invalid thread ID specification %s."), id_tok_start);
6111 /* Check if the thread actually exists. */
6112 if (!valid_thread_id (thread))
6113 error (_("Unknown thread %d."), thread);
6115 /* Truncate the string and get rid of the thread <thread_num>
6116 parameter before the parameter list is parsed by the
6117 evaluate_expression() function. */
6122 /* Parse the rest of the arguments. */
6123 innermost_block = NULL;
6125 exp = parse_exp_1 (&arg, 0, 0);
6127 /* Remove trailing whitespace from the expression before saving it.
6128 This makes the eventual display of the expression string a bit
6130 while (exp_end > exp_start && (exp_end[-1] == ' ' || exp_end[-1] == '\t'))
6133 exp_valid_block = innermost_block;
6134 mark = value_mark ();
6135 fetch_watchpoint_value (exp, &val, NULL, NULL);
6137 release_value (val);
6140 while (*tok == ' ' || *tok == '\t')
6144 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
6147 toklen = end_tok - tok;
6148 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
6150 tok = cond_start = end_tok + 1;
6151 cond = parse_exp_1 (&tok, 0, 0);
6155 error (_("Junk at end of command."));
6157 if (accessflag == hw_read)
6158 bp_type = bp_read_watchpoint;
6159 else if (accessflag == hw_access)
6160 bp_type = bp_access_watchpoint;
6162 bp_type = bp_hardware_watchpoint;
6164 mem_cnt = can_use_hardware_watchpoint (val);
6165 if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
6166 error (_("Expression cannot be implemented with read/access watchpoint."));
6169 i = hw_watchpoint_used_count (bp_type, &other_type_used);
6170 target_resources_ok =
6171 target_can_use_hardware_watchpoint (bp_type, i + mem_cnt,
6173 if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
6174 error (_("Target does not support this type of hardware watchpoint."));
6176 if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
6177 error (_("Target can only support one kind of HW watchpoint at a time."));
6180 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
6181 watchpoint could not be set. */
6182 if (!mem_cnt || target_resources_ok <= 0)
6183 bp_type = bp_watchpoint;
6185 frame = block_innermost_frame (exp_valid_block);
6187 prev_frame = get_prev_frame (frame);
6191 /* If the expression is "local", then set up a "watchpoint scope"
6192 breakpoint at the point where we've left the scope of the watchpoint
6193 expression. Create the scope breakpoint before the watchpoint, so
6194 that we will encounter it first in bpstat_stop_status. */
6195 if (innermost_block && prev_frame)
6197 scope_breakpoint = create_internal_breakpoint (get_frame_pc (prev_frame),
6198 bp_watchpoint_scope);
6200 scope_breakpoint->enable_state = bp_enabled;
6202 /* Automatically delete the breakpoint when it hits. */
6203 scope_breakpoint->disposition = disp_del;
6205 /* Only break in the proper frame (help with recursion). */
6206 scope_breakpoint->frame_id = get_frame_id (prev_frame);
6208 /* Set the address at which we will stop. */
6209 scope_breakpoint->loc->requested_address
6210 = get_frame_pc (prev_frame);
6211 scope_breakpoint->loc->address
6212 = adjust_breakpoint_address (scope_breakpoint->loc->requested_address,
6213 scope_breakpoint->type);
6216 /* Now set up the breakpoint. */
6217 b = set_raw_breakpoint (sal, bp_type);
6218 set_breakpoint_count (breakpoint_count + 1);
6219 b->number = breakpoint_count;
6221 b->disposition = disp_donttouch;
6223 b->exp_valid_block = exp_valid_block;
6224 b->exp_string = savestring (exp_start, exp_end - exp_start);
6227 b->loc->cond = cond;
6229 b->cond_string = savestring (cond_start, cond_end - cond_start);
6234 b->watchpoint_frame = get_frame_id (frame);
6236 b->watchpoint_frame = null_frame_id;
6238 if (scope_breakpoint != NULL)
6240 /* The scope breakpoint is related to the watchpoint. We will
6241 need to act on them together. */
6242 b->related_breakpoint = scope_breakpoint;
6243 scope_breakpoint->related_breakpoint = b;
6246 value_free_to_mark (mark);
6248 update_global_location_list (1);
6251 /* Return count of locations need to be watched and can be handled
6252 in hardware. If the watchpoint can not be handled
6253 in hardware return zero. */
6256 can_use_hardware_watchpoint (struct value *v)
6258 int found_memory_cnt = 0;
6259 struct value *head = v;
6261 /* Did the user specifically forbid us to use hardware watchpoints? */
6262 if (!can_use_hw_watchpoints)
6265 /* Make sure that the value of the expression depends only upon
6266 memory contents, and values computed from them within GDB. If we
6267 find any register references or function calls, we can't use a
6268 hardware watchpoint.
6270 The idea here is that evaluating an expression generates a series
6271 of values, one holding the value of every subexpression. (The
6272 expression a*b+c has five subexpressions: a, b, a*b, c, and
6273 a*b+c.) GDB's values hold almost enough information to establish
6274 the criteria given above --- they identify memory lvalues,
6275 register lvalues, computed values, etcetera. So we can evaluate
6276 the expression, and then scan the chain of values that leaves
6277 behind to decide whether we can detect any possible change to the
6278 expression's final value using only hardware watchpoints.
6280 However, I don't think that the values returned by inferior
6281 function calls are special in any way. So this function may not
6282 notice that an expression involving an inferior function call
6283 can't be watched with hardware watchpoints. FIXME. */
6284 for (; v; v = value_next (v))
6286 if (VALUE_LVAL (v) == lval_memory)
6289 /* A lazy memory lvalue is one that GDB never needed to fetch;
6290 we either just used its address (e.g., `a' in `a.b') or
6291 we never needed it at all (e.g., `a' in `a,b'). */
6295 /* Ahh, memory we actually used! Check if we can cover
6296 it with hardware watchpoints. */
6297 struct type *vtype = check_typedef (value_type (v));
6299 /* We only watch structs and arrays if user asked for it
6300 explicitly, never if they just happen to appear in a
6301 middle of some value chain. */
6303 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
6304 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
6306 CORE_ADDR vaddr = VALUE_ADDRESS (v) + value_offset (v);
6307 int len = TYPE_LENGTH (value_type (v));
6309 if (!target_region_ok_for_hw_watchpoint (vaddr, len))
6316 else if (VALUE_LVAL (v) != not_lval
6317 && deprecated_value_modifiable (v) == 0)
6318 return 0; /* ??? What does this represent? */
6319 else if (VALUE_LVAL (v) == lval_register)
6320 return 0; /* cannot watch a register with a HW watchpoint */
6323 /* The expression itself looks suitable for using a hardware
6324 watchpoint, but give the target machine a chance to reject it. */
6325 return found_memory_cnt;
6329 watch_command_wrapper (char *arg, int from_tty)
6331 watch_command (arg, from_tty);
6335 watch_command (char *arg, int from_tty)
6337 watch_command_1 (arg, hw_write, from_tty);
6341 rwatch_command_wrapper (char *arg, int from_tty)
6343 rwatch_command (arg, from_tty);
6347 rwatch_command (char *arg, int from_tty)
6349 watch_command_1 (arg, hw_read, from_tty);
6353 awatch_command_wrapper (char *arg, int from_tty)
6355 awatch_command (arg, from_tty);
6359 awatch_command (char *arg, int from_tty)
6361 watch_command_1 (arg, hw_access, from_tty);
6365 /* Helper routines for the until_command routine in infcmd.c. Here
6366 because it uses the mechanisms of breakpoints. */
6368 struct until_break_command_continuation_args
6370 struct breakpoint *breakpoint;
6371 struct breakpoint *breakpoint2;
6374 /* This function is called by fetch_inferior_event via the
6375 cmd_continuation pointer, to complete the until command. It takes
6376 care of cleaning up the temporary breakpoints set up by the until
6379 until_break_command_continuation (void *arg)
6381 struct until_break_command_continuation_args *a = arg;
6383 delete_breakpoint (a->breakpoint);
6385 delete_breakpoint (a->breakpoint2);
6389 until_break_command (char *arg, int from_tty, int anywhere)
6391 struct symtabs_and_lines sals;
6392 struct symtab_and_line sal;
6393 struct frame_info *frame = get_selected_frame (NULL);
6394 struct frame_info *prev_frame = get_prev_frame (frame);
6395 struct breakpoint *breakpoint;
6396 struct breakpoint *breakpoint2 = NULL;
6397 struct cleanup *old_chain;
6399 clear_proceed_status ();
6401 /* Set a breakpoint where the user wants it and at return from
6404 if (default_breakpoint_valid)
6405 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
6406 default_breakpoint_line, (char ***) NULL, NULL);
6408 sals = decode_line_1 (&arg, 1, (struct symtab *) NULL,
6409 0, (char ***) NULL, NULL);
6411 if (sals.nelts != 1)
6412 error (_("Couldn't get information on specified line."));
6415 xfree (sals.sals); /* malloc'd, so freed */
6418 error (_("Junk at end of arguments."));
6420 resolve_sal_pc (&sal);
6423 /* If the user told us to continue until a specified location,
6424 we don't specify a frame at which we need to stop. */
6425 breakpoint = set_momentary_breakpoint (sal, null_frame_id, bp_until);
6427 /* Otherwise, specify the current frame, because we want to stop only
6428 at the very same frame. */
6429 breakpoint = set_momentary_breakpoint (sal, get_frame_id (frame),
6432 old_chain = make_cleanup_delete_breakpoint (breakpoint);
6434 /* Keep within the current frame, or in frames called by the current
6438 sal = find_pc_line (get_frame_pc (prev_frame), 0);
6439 sal.pc = get_frame_pc (prev_frame);
6440 breakpoint2 = set_momentary_breakpoint (sal, get_frame_id (prev_frame),
6442 make_cleanup_delete_breakpoint (breakpoint2);
6445 proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
6447 /* If we are running asynchronously, and proceed call above has actually
6448 managed to start the target, arrange for breakpoints to be
6449 deleted when the target stops. Otherwise, we're already stopped and
6450 delete breakpoints via cleanup chain. */
6452 if (target_can_async_p () && is_running (inferior_ptid))
6454 struct until_break_command_continuation_args *args;
6455 args = xmalloc (sizeof (*args));
6457 args->breakpoint = breakpoint;
6458 args->breakpoint2 = breakpoint2;
6460 discard_cleanups (old_chain);
6461 add_continuation (inferior_thread (),
6462 until_break_command_continuation, args,
6466 do_cleanups (old_chain);
6470 ep_skip_leading_whitespace (char **s)
6472 if ((s == NULL) || (*s == NULL))
6474 while (isspace (**s))
6478 /* This function attempts to parse an optional "if <cond>" clause
6479 from the arg string. If one is not found, it returns NULL.
6481 Else, it returns a pointer to the condition string. (It does not
6482 attempt to evaluate the string against a particular block.) And,
6483 it updates arg to point to the first character following the parsed
6484 if clause in the arg string. */
6487 ep_parse_optional_if_clause (char **arg)
6491 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
6494 /* Skip the "if" keyword. */
6497 /* Skip any extra leading whitespace, and record the start of the
6498 condition string. */
6499 ep_skip_leading_whitespace (arg);
6502 /* Assume that the condition occupies the remainder of the arg string. */
6503 (*arg) += strlen (cond_string);
6508 /* This function attempts to parse an optional filename from the arg
6509 string. If one is not found, it returns NULL.
6511 Else, it returns a pointer to the parsed filename. (This function
6512 makes no attempt to verify that a file of that name exists, or is
6513 accessible.) And, it updates arg to point to the first character
6514 following the parsed filename in the arg string.
6516 Note that clients needing to preserve the returned filename for
6517 future access should copy it to their own buffers. */
6519 ep_parse_optional_filename (char **arg)
6521 static char filename[1024];
6526 if ((*arg_p == '\0') || isspace (*arg_p))
6544 /* Commands to deal with catching events, such as signals, exceptions,
6545 process start/exit, etc. */
6549 catch_fork_temporary, catch_vfork_temporary,
6550 catch_fork_permanent, catch_vfork_permanent
6555 catch_fork_command_1 (char *arg, int from_tty, struct cmd_list_element *command)
6557 char *cond_string = NULL;
6558 catch_fork_kind fork_kind;
6561 fork_kind = (catch_fork_kind) (uintptr_t) get_cmd_context (command);
6562 tempflag = (fork_kind == catch_fork_temporary
6563 || fork_kind == catch_vfork_temporary);
6567 ep_skip_leading_whitespace (&arg);
6569 /* The allowed syntax is:
6571 catch [v]fork if <cond>
6573 First, check if there's an if clause. */
6574 cond_string = ep_parse_optional_if_clause (&arg);
6576 if ((*arg != '\0') && !isspace (*arg))
6577 error (_("Junk at end of arguments."));
6579 /* If this target supports it, create a fork or vfork catchpoint
6580 and enable reporting of such events. */
6583 case catch_fork_temporary:
6584 case catch_fork_permanent:
6585 create_fork_vfork_event_catchpoint (tempflag, cond_string,
6586 &catch_fork_breakpoint_ops);
6588 case catch_vfork_temporary:
6589 case catch_vfork_permanent:
6590 create_fork_vfork_event_catchpoint (tempflag, cond_string,
6591 &catch_vfork_breakpoint_ops);
6594 error (_("unsupported or unknown fork kind; cannot catch it"));
6600 catch_exec_command_1 (char *arg, int from_tty, struct cmd_list_element *command)
6603 char *cond_string = NULL;
6605 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
6609 ep_skip_leading_whitespace (&arg);
6611 /* The allowed syntax is:
6613 catch exec if <cond>
6615 First, check if there's an if clause. */
6616 cond_string = ep_parse_optional_if_clause (&arg);
6618 if ((*arg != '\0') && !isspace (*arg))
6619 error (_("Junk at end of arguments."));
6621 /* If this target supports it, create an exec catchpoint
6622 and enable reporting of such events. */
6623 create_catchpoint (tempflag, cond_string, &catch_exec_breakpoint_ops);
6626 static enum print_stop_action
6627 print_exception_catchpoint (struct breakpoint *b)
6629 int bp_temp, bp_throw;
6631 annotate_catchpoint (b->number);
6633 bp_throw = strstr (b->addr_string, "throw") != NULL;
6634 if (b->loc->address != b->loc->requested_address)
6635 breakpoint_adjustment_warning (b->loc->requested_address,
6638 bp_temp = b->disposition == disp_del;
6640 bp_temp ? "Temporary catchpoint "
6642 if (!ui_out_is_mi_like_p (uiout))
6643 ui_out_field_int (uiout, "bkptno", b->number);
6645 bp_throw ? " (exception thrown), "
6646 : " (exception caught), ");
6647 if (ui_out_is_mi_like_p (uiout))
6649 ui_out_field_string (uiout, "reason",
6650 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
6651 ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
6652 ui_out_field_int (uiout, "bkptno", b->number);
6654 return PRINT_SRC_AND_LOC;
6658 print_one_exception_catchpoint (struct breakpoint *b, CORE_ADDR *last_addr)
6660 struct value_print_options opts;
6661 get_user_print_options (&opts);
6662 if (opts.addressprint)
6665 if (b->loc == NULL || b->loc->shlib_disabled)
6666 ui_out_field_string (uiout, "addr", "<PENDING>");
6668 ui_out_field_core_addr (uiout, "addr", b->loc->address);
6672 *last_addr = b->loc->address;
6673 if (strstr (b->addr_string, "throw") != NULL)
6674 ui_out_field_string (uiout, "what", "exception throw");
6676 ui_out_field_string (uiout, "what", "exception catch");
6680 print_mention_exception_catchpoint (struct breakpoint *b)
6685 bp_temp = b->disposition == disp_del;
6686 bp_throw = strstr (b->addr_string, "throw") != NULL;
6687 ui_out_text (uiout, bp_temp ? _("Temporary catchpoint ")
6688 : _("Catchpoint "));
6689 ui_out_field_int (uiout, "bkptno", b->number);
6690 ui_out_text (uiout, bp_throw ? _(" (throw)")
6694 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops = {
6697 NULL, /* breakpoint_hit */
6698 print_exception_catchpoint,
6699 print_one_exception_catchpoint,
6700 print_mention_exception_catchpoint
6704 handle_gnu_v3_exceptions (int tempflag, char *cond_string,
6705 enum exception_event_kind ex_event, int from_tty)
6707 char *trigger_func_name;
6709 if (ex_event == EX_EVENT_CATCH)
6710 trigger_func_name = "__cxa_begin_catch";
6712 trigger_func_name = "__cxa_throw";
6714 break_command_really (trigger_func_name, cond_string, -1,
6715 0 /* condition and thread are valid. */,
6718 AUTO_BOOLEAN_TRUE /* pending */,
6719 &gnu_v3_exception_catchpoint_ops, from_tty,
6725 /* Deal with "catch catch" and "catch throw" commands */
6728 catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
6729 int tempflag, int from_tty)
6731 char *cond_string = NULL;
6732 struct symtab_and_line *sal = NULL;
6736 ep_skip_leading_whitespace (&arg);
6738 cond_string = ep_parse_optional_if_clause (&arg);
6740 if ((*arg != '\0') && !isspace (*arg))
6741 error (_("Junk at end of arguments."));
6743 if ((ex_event != EX_EVENT_THROW) &&
6744 (ex_event != EX_EVENT_CATCH))
6745 error (_("Unsupported or unknown exception event; cannot catch it"));
6747 if (handle_gnu_v3_exceptions (tempflag, cond_string, ex_event, from_tty))
6750 warning (_("Unsupported with this platform/compiler combination."));
6753 /* Implementation of "catch catch" command. */
6756 catch_catch_command (char *arg, int from_tty, struct cmd_list_element *command)
6758 int tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
6759 catch_exception_command_1 (EX_EVENT_CATCH, arg, tempflag, from_tty);
6762 /* Implementation of "catch throw" command. */
6765 catch_throw_command (char *arg, int from_tty, struct cmd_list_element *command)
6767 int tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
6768 catch_exception_command_1 (EX_EVENT_THROW, arg, tempflag, from_tty);
6771 /* Create a breakpoint struct for Ada exception catchpoints. */
6774 create_ada_exception_breakpoint (struct symtab_and_line sal,
6778 struct expression *cond,
6779 struct breakpoint_ops *ops,
6783 struct breakpoint *b;
6787 describe_other_breakpoints (sal.pc, sal.section, -1);
6788 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6789 version for exception catchpoints, because two catchpoints
6790 used for different exception names will use the same address.
6791 In this case, a "breakpoint ... also set at..." warning is
6792 unproductive. Besides. the warning phrasing is also a bit
6793 inapropriate, we should use the word catchpoint, and tell
6794 the user what type of catchpoint it is. The above is good
6795 enough for now, though. */
6798 b = set_raw_breakpoint (sal, bp_breakpoint);
6799 set_breakpoint_count (breakpoint_count + 1);
6801 b->enable_state = bp_enabled;
6802 b->disposition = tempflag ? disp_del : disp_donttouch;
6803 b->number = breakpoint_count;
6804 b->ignore_count = 0;
6805 b->loc->cond = cond;
6806 b->addr_string = addr_string;
6807 b->language = language_ada;
6808 b->cond_string = cond_string;
6809 b->exp_string = exp_string;
6814 update_global_location_list (1);
6817 /* Implement the "catch exception" command. */
6820 catch_ada_exception_command (char *arg, int from_tty,
6821 struct cmd_list_element *command)
6824 struct symtab_and_line sal;
6826 char *addr_string = NULL;
6827 char *exp_string = NULL;
6828 char *cond_string = NULL;
6829 struct expression *cond = NULL;
6830 struct breakpoint_ops *ops = NULL;
6832 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
6836 sal = ada_decode_exception_location (arg, &addr_string, &exp_string,
6837 &cond_string, &cond, &ops);
6838 create_ada_exception_breakpoint (sal, addr_string, exp_string,
6839 cond_string, cond, ops, tempflag,
6843 /* Implement the "catch assert" command. */
6846 catch_assert_command (char *arg, int from_tty, struct cmd_list_element *command)
6849 struct symtab_and_line sal;
6850 char *addr_string = NULL;
6851 struct breakpoint_ops *ops = NULL;
6853 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
6857 sal = ada_decode_assert_location (arg, &addr_string, &ops);
6858 create_ada_exception_breakpoint (sal, addr_string, NULL, NULL, NULL, ops,
6859 tempflag, from_tty);
6863 catch_command (char *arg, int from_tty)
6865 error (_("Catch requires an event name."));
6870 tcatch_command (char *arg, int from_tty)
6872 error (_("Catch requires an event name."));
6875 /* Delete breakpoints by address or line. */
6878 clear_command (char *arg, int from_tty)
6880 struct breakpoint *b;
6881 VEC(breakpoint_p) *found = 0;
6884 struct symtabs_and_lines sals;
6885 struct symtab_and_line sal;
6890 sals = decode_line_spec (arg, 1);
6895 sals.sals = (struct symtab_and_line *)
6896 xmalloc (sizeof (struct symtab_and_line));
6897 make_cleanup (xfree, sals.sals);
6898 init_sal (&sal); /* initialize to zeroes */
6899 sal.line = default_breakpoint_line;
6900 sal.symtab = default_breakpoint_symtab;
6901 sal.pc = default_breakpoint_address;
6902 if (sal.symtab == 0)
6903 error (_("No source file specified."));
6911 /* We don't call resolve_sal_pc here. That's not
6912 as bad as it seems, because all existing breakpoints
6913 typically have both file/line and pc set. So, if
6914 clear is given file/line, we can match this to existing
6915 breakpoint without obtaining pc at all.
6917 We only support clearing given the address explicitly
6918 present in breakpoint table. Say, we've set breakpoint
6919 at file:line. There were several PC values for that file:line,
6920 due to optimization, all in one block.
6921 We've picked one PC value. If "clear" is issued with another
6922 PC corresponding to the same file:line, the breakpoint won't
6923 be cleared. We probably can still clear the breakpoint, but
6924 since the other PC value is never presented to user, user
6925 can only find it by guessing, and it does not seem important
6928 /* For each line spec given, delete bps which correspond
6929 to it. Do it in two passes, solely to preserve the current
6930 behavior that from_tty is forced true if we delete more than
6934 for (i = 0; i < sals.nelts; i++)
6936 /* If exact pc given, clear bpts at that pc.
6937 If line given (pc == 0), clear all bpts on specified line.
6938 If defaulting, clear all bpts on default line
6941 defaulting sal.pc != 0 tests to do
6946 1 0 <can't happen> */
6950 /* Find all matching breakpoints and add them to
6955 /* Are we going to delete b? */
6956 if (b->type != bp_none
6957 && b->type != bp_watchpoint
6958 && b->type != bp_hardware_watchpoint
6959 && b->type != bp_read_watchpoint
6960 && b->type != bp_access_watchpoint)
6962 struct bp_location *loc = b->loc;
6963 for (; loc; loc = loc->next)
6965 int pc_match = sal.pc
6966 && (loc->address == sal.pc)
6967 && (!section_is_overlay (loc->section)
6968 || loc->section == sal.section);
6969 int line_match = ((default_match || (0 == sal.pc))
6970 && b->source_file != NULL
6971 && sal.symtab != NULL
6972 && strcmp (b->source_file, sal.symtab->filename) == 0
6973 && b->line_number == sal.line);
6974 if (pc_match || line_match)
6983 VEC_safe_push(breakpoint_p, found, b);
6986 /* Now go thru the 'found' chain and delete them. */
6987 if (VEC_empty(breakpoint_p, found))
6990 error (_("No breakpoint at %s."), arg);
6992 error (_("No breakpoint at this line."));
6995 if (VEC_length(breakpoint_p, found) > 1)
6996 from_tty = 1; /* Always report if deleted more than one */
6999 if (VEC_length(breakpoint_p, found) == 1)
7000 printf_unfiltered (_("Deleted breakpoint "));
7002 printf_unfiltered (_("Deleted breakpoints "));
7004 breakpoints_changed ();
7006 for (ix = 0; VEC_iterate(breakpoint_p, found, ix, b); ix++)
7009 printf_unfiltered ("%d ", b->number);
7010 delete_breakpoint (b);
7013 putchar_unfiltered ('\n');
7016 /* Delete breakpoint in BS if they are `delete' breakpoints and
7017 all breakpoints that are marked for deletion, whether hit or not.
7018 This is called after any breakpoint is hit, or after errors. */
7021 breakpoint_auto_delete (bpstat bs)
7023 struct breakpoint *b, *temp;
7025 for (; bs; bs = bs->next)
7026 if (bs->breakpoint_at
7027 && bs->breakpoint_at->owner
7028 && bs->breakpoint_at->owner->disposition == disp_del
7030 delete_breakpoint (bs->breakpoint_at->owner);
7032 ALL_BREAKPOINTS_SAFE (b, temp)
7034 if (b->disposition == disp_del_at_next_stop)
7035 delete_breakpoint (b);
7039 /* A cleanup function which destroys a vector. */
7042 do_vec_free (void *p)
7044 VEC(bp_location_p) **vec = p;
7046 VEC_free (bp_location_p, *vec);
7049 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
7050 into the inferior, only remove already-inserted locations that no
7051 longer should be inserted. Functions that delete a breakpoint or
7052 breakpoints should pass false, so that deleting a breakpoint
7053 doesn't have the side effect of inserting the locations of other
7054 breakpoints that are marked not-inserted, but should_be_inserted
7055 returns true on them.
7057 This behaviour is useful is situations close to tear-down -- e.g.,
7058 after an exec, while the target still has execution, but breakpoint
7059 shadows of the previous executable image should *NOT* be restored
7060 to the new image; or before detaching, where the target still has
7061 execution and wants to delete breakpoints from GDB's lists, and all
7062 breakpoints had already been removed from the inferior. */
7065 update_global_location_list (int should_insert)
7067 struct breakpoint *b;
7068 struct bp_location **next = &bp_location_chain;
7069 struct bp_location *loc;
7070 struct bp_location *loc2;
7071 VEC(bp_location_p) *old_locations = NULL;
7074 struct cleanup *cleanups;
7076 cleanups = make_cleanup (do_vec_free, &old_locations);
7077 /* Store old locations for future reference. */
7078 for (loc = bp_location_chain; loc; loc = loc->global_next)
7079 VEC_safe_push (bp_location_p, old_locations, loc);
7081 bp_location_chain = NULL;
7084 for (loc = b->loc; loc; loc = loc->next)
7087 next = &(loc->global_next);
7092 /* Identify bp_location instances that are no longer present in the new
7093 list, and therefore should be freed. Note that it's not necessary that
7094 those locations should be removed from inferior -- if there's another
7095 location at the same address (previously marked as duplicate),
7096 we don't need to remove/insert the location. */
7097 for (ix = 0; VEC_iterate(bp_location_p, old_locations, ix, loc); ++ix)
7099 /* Tells if 'loc' is found amoung the new locations. If not, we
7101 int found_object = 0;
7102 /* Tells if the location should remain inserted in the target. */
7103 int keep_in_target = 0;
7105 for (loc2 = bp_location_chain; loc2; loc2 = loc2->global_next)
7112 /* If this location is no longer present, and inserted, look if there's
7113 maybe a new location at the same address. If so, mark that one
7114 inserted, and don't remove this one. This is needed so that we
7115 don't have a time window where a breakpoint at certain location is not
7120 /* If the location is inserted now, we might have to remove it. */
7122 if (found_object && should_be_inserted (loc))
7124 /* The location is still present in the location list, and still
7125 should be inserted. Don't do anything. */
7130 /* The location is either no longer present, or got disabled.
7131 See if there's another location at the same address, in which
7132 case we don't need to remove this one from the target. */
7133 if (breakpoint_address_is_meaningful (loc->owner))
7134 for (loc2 = bp_location_chain; loc2; loc2 = loc2->global_next)
7136 /* For the sake of should_insert_location. The
7137 call to check_duplicates will fix up this later. */
7138 loc2->duplicate = 0;
7139 if (should_be_inserted (loc2)
7140 && loc2 != loc && loc2->address == loc->address)
7143 loc2->target_info = loc->target_info;
7150 if (!keep_in_target)
7152 if (remove_breakpoint (loc, mark_uninserted))
7154 /* This is just about all we can do. We could keep this
7155 location on the global list, and try to remove it next
7156 time, but there's no particular reason why we will
7159 Note that at this point, loc->owner is still valid,
7160 as delete_breakpoint frees the breakpoint only
7161 after calling us. */
7162 printf_filtered (_("warning: Error removing breakpoint %d\n"),
7163 loc->owner->number);
7171 if (removed && non_stop)
7173 /* This location was removed from the targets. In non-stop mode,
7174 a race condition is possible where we've removed a breakpoint,
7175 but stop events for that breakpoint are already queued and will
7176 arrive later. To suppress spurious SIGTRAPs reported to user,
7177 we keep this breakpoint location for a bit, and will retire it
7178 after we see 3 * thread_count events.
7179 The theory here is that reporting of events should,
7180 "on the average", be fair, so after that many event we'll see
7181 events from all threads that have anything of interest, and no
7182 longer need to keep this breakpoint. This is just a
7183 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7184 which is usability issue, but not a correctness problem. */
7185 loc->events_till_retirement = 3 * (thread_count () + 1);
7188 VEC_safe_push (bp_location_p, moribund_locations, loc);
7191 free_bp_location (loc);
7197 check_duplicates (b);
7200 if (breakpoints_always_inserted_mode () && should_insert
7201 && (target_has_execution
7202 || (gdbarch_has_global_breakpoints (target_gdbarch))))
7203 insert_breakpoint_locations ();
7205 do_cleanups (cleanups);
7209 breakpoint_retire_moribund (void)
7211 struct bp_location *loc;
7214 for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix)
7215 if (--(loc->events_till_retirement) == 0)
7217 free_bp_location (loc);
7218 VEC_unordered_remove (bp_location_p, moribund_locations, ix);
7224 update_global_location_list_nothrow (int inserting)
7226 struct gdb_exception e;
7227 TRY_CATCH (e, RETURN_MASK_ERROR)
7228 update_global_location_list (inserting);
7231 /* Clear BPT from a BPS. */
7233 bpstat_remove_breakpoint (bpstat bps, struct breakpoint *bpt)
7236 for (bs = bps; bs; bs = bs->next)
7237 if (bs->breakpoint_at && bs->breakpoint_at->owner == bpt)
7239 bs->breakpoint_at = NULL;
7241 /* bs->commands will be freed later. */
7245 /* Callback for iterate_over_threads. */
7247 bpstat_remove_breakpoint_callback (struct thread_info *th, void *data)
7249 struct breakpoint *bpt = data;
7250 bpstat_remove_breakpoint (th->stop_bpstat, bpt);
7254 /* Delete a breakpoint and clean up all traces of it in the data
7258 delete_breakpoint (struct breakpoint *bpt)
7260 struct breakpoint *b;
7261 struct bp_location *loc, *next;
7263 gdb_assert (bpt != NULL);
7265 /* Has this bp already been deleted? This can happen because multiple
7266 lists can hold pointers to bp's. bpstat lists are especial culprits.
7268 One example of this happening is a watchpoint's scope bp. When the
7269 scope bp triggers, we notice that the watchpoint is out of scope, and
7270 delete it. We also delete its scope bp. But the scope bp is marked
7271 "auto-deleting", and is already on a bpstat. That bpstat is then
7272 checked for auto-deleting bp's, which are deleted.
7274 A real solution to this problem might involve reference counts in bp's,
7275 and/or giving them pointers back to their referencing bpstat's, and
7276 teaching delete_breakpoint to only free a bp's storage when no more
7277 references were extent. A cheaper bandaid was chosen. */
7278 if (bpt->type == bp_none)
7281 observer_notify_breakpoint_deleted (bpt->number);
7283 if (breakpoint_chain == bpt)
7284 breakpoint_chain = bpt->next;
7289 b->next = bpt->next;
7293 free_command_lines (&bpt->commands);
7294 if (bpt->cond_string != NULL)
7295 xfree (bpt->cond_string);
7296 if (bpt->addr_string != NULL)
7297 xfree (bpt->addr_string);
7298 if (bpt->exp != NULL)
7300 if (bpt->exp_string != NULL)
7301 xfree (bpt->exp_string);
7302 if (bpt->val != NULL)
7303 value_free (bpt->val);
7304 if (bpt->source_file != NULL)
7305 xfree (bpt->source_file);
7306 if (bpt->exec_pathname != NULL)
7307 xfree (bpt->exec_pathname);
7309 /* Be sure no bpstat's are pointing at it after it's been freed. */
7310 /* FIXME, how can we find all bpstat's?
7311 We just check stop_bpstat for now. Note that we cannot just
7312 remove bpstats pointing at bpt from the stop_bpstat list
7313 entirely, as breakpoint commands are associated with the bpstat;
7314 if we remove it here, then the later call to
7315 bpstat_do_actions (&stop_bpstat);
7316 in event-top.c won't do anything, and temporary breakpoints
7317 with commands won't work. */
7319 iterate_over_threads (bpstat_remove_breakpoint_callback, bpt);
7321 /* Now that breakpoint is removed from breakpoint
7322 list, update the global location list. This
7323 will remove locations that used to belong to
7324 this breakpoint. Do this before freeing
7325 the breakpoint itself, since remove_breakpoint
7326 looks at location's owner. It might be better
7327 design to have location completely self-contained,
7328 but it's not the case now. */
7329 update_global_location_list (0);
7332 /* On the chance that someone will soon try again to delete this same
7333 bp, we mark it as deleted before freeing its storage. */
7334 bpt->type = bp_none;
7340 do_delete_breakpoint_cleanup (void *b)
7342 delete_breakpoint (b);
7346 make_cleanup_delete_breakpoint (struct breakpoint *b)
7348 return make_cleanup (do_delete_breakpoint_cleanup, b);
7352 delete_command (char *arg, int from_tty)
7354 struct breakpoint *b, *temp;
7360 int breaks_to_delete = 0;
7362 /* Delete all breakpoints if no argument.
7363 Do not delete internal or call-dummy breakpoints, these
7364 have to be deleted with an explicit breakpoint number argument. */
7367 if (b->type != bp_call_dummy &&
7368 b->type != bp_shlib_event &&
7369 b->type != bp_thread_event &&
7370 b->type != bp_overlay_event &&
7373 breaks_to_delete = 1;
7378 /* Ask user only if there are some breakpoints to delete. */
7380 || (breaks_to_delete && query (_("Delete all breakpoints? "))))
7382 ALL_BREAKPOINTS_SAFE (b, temp)
7384 if (b->type != bp_call_dummy &&
7385 b->type != bp_shlib_event &&
7386 b->type != bp_thread_event &&
7387 b->type != bp_overlay_event &&
7389 delete_breakpoint (b);
7394 map_breakpoint_numbers (arg, delete_breakpoint);
7398 all_locations_are_pending (struct bp_location *loc)
7400 for (; loc; loc = loc->next)
7401 if (!loc->shlib_disabled)
7406 /* Subroutine of update_breakpoint_locations to simplify it.
7407 Return non-zero if multiple fns in list LOC have the same name.
7408 Null names are ignored. */
7411 ambiguous_names_p (struct bp_location *loc)
7413 struct bp_location *l;
7414 htab_t htab = htab_create_alloc (13, htab_hash_string,
7415 (int (*) (const void *, const void *)) streq,
7416 NULL, xcalloc, xfree);
7418 for (l = loc; l != NULL; l = l->next)
7421 const char *name = l->function_name;
7423 /* Allow for some names to be NULL, ignore them. */
7427 slot = (const char **) htab_find_slot (htab, (const void *) name,
7429 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7444 update_breakpoint_locations (struct breakpoint *b,
7445 struct symtabs_and_lines sals)
7449 struct bp_location *existing_locations = b->loc;
7451 /* If there's no new locations, and all existing locations
7452 are pending, don't do anything. This optimizes
7453 the common case where all locations are in the same
7454 shared library, that was unloaded. We'd like to
7455 retain the location, so that when the library
7456 is loaded again, we don't loose the enabled/disabled
7457 status of the individual locations. */
7458 if (all_locations_are_pending (existing_locations) && sals.nelts == 0)
7463 for (i = 0; i < sals.nelts; ++i)
7465 struct bp_location *new_loc =
7466 add_location_to_breakpoint (b, &(sals.sals[i]));
7468 /* Reparse conditions, they might contain references to the
7470 if (b->cond_string != NULL)
7472 struct gdb_exception e;
7475 TRY_CATCH (e, RETURN_MASK_ERROR)
7477 new_loc->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc),
7482 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7483 b->number, e.message);
7484 new_loc->enabled = 0;
7488 if (b->source_file != NULL)
7489 xfree (b->source_file);
7490 if (sals.sals[i].symtab == NULL)
7491 b->source_file = NULL;
7494 savestring (sals.sals[i].symtab->filename,
7495 strlen (sals.sals[i].symtab->filename));
7497 if (b->line_number == 0)
7498 b->line_number = sals.sals[i].line;
7501 /* Update locations of permanent breakpoints. */
7502 if (b->enable_state == bp_permanent)
7503 make_breakpoint_permanent (b);
7505 /* If possible, carry over 'disable' status from existing breakpoints. */
7507 struct bp_location *e = existing_locations;
7508 /* If there are multiple breakpoints with the same function name,
7509 e.g. for inline functions, comparing function names won't work.
7510 Instead compare pc addresses; this is just a heuristic as things
7511 may have moved, but in practice it gives the correct answer
7512 often enough until a better solution is found. */
7513 int have_ambiguous_names = ambiguous_names_p (b->loc);
7515 for (; e; e = e->next)
7517 if (!e->enabled && e->function_name)
7519 struct bp_location *l = b->loc;
7520 if (have_ambiguous_names)
7522 for (; l; l = l->next)
7523 if (e->address == l->address)
7531 for (; l; l = l->next)
7532 if (l->function_name
7533 && strcmp (e->function_name, l->function_name) == 0)
7543 update_global_location_list (1);
7547 /* Reset a breakpoint given it's struct breakpoint * BINT.
7548 The value we return ends up being the return value from catch_errors.
7549 Unused in this case. */
7552 breakpoint_re_set_one (void *bint)
7554 /* get past catch_errs */
7555 struct breakpoint *b = (struct breakpoint *) bint;
7559 int *not_found_ptr = ¬_found;
7560 struct symtabs_and_lines sals = {};
7561 struct symtabs_and_lines expanded;
7563 enum enable_state save_enable;
7564 struct gdb_exception e;
7565 struct cleanup *cleanups;
7570 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7574 case bp_hardware_breakpoint:
7576 if (b->addr_string == NULL)
7578 /* Anything without a string can't be re-set. */
7579 delete_breakpoint (b);
7583 set_language (b->language);
7584 input_radix = b->input_radix;
7586 TRY_CATCH (e, RETURN_MASK_ERROR)
7588 sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL,
7593 int not_found_and_ok = 0;
7594 /* For pending breakpoints, it's expected that parsing
7595 will fail until the right shared library is loaded.
7596 User has already told to create pending breakpoints and
7597 don't need extra messages. If breakpoint is in bp_shlib_disabled
7598 state, then user already saw the message about that breakpoint
7599 being disabled, and don't want to see more errors. */
7601 && (b->condition_not_parsed
7602 || (b->loc && b->loc->shlib_disabled)
7603 || b->enable_state == bp_disabled))
7604 not_found_and_ok = 1;
7606 if (!not_found_and_ok)
7608 /* We surely don't want to warn about the same breakpoint
7609 10 times. One solution, implemented here, is disable
7610 the breakpoint on error. Another solution would be to
7611 have separate 'warning emitted' flag. Since this
7612 happens only when a binary has changed, I don't know
7613 which approach is better. */
7614 b->enable_state = bp_disabled;
7615 throw_exception (e);
7622 gdb_assert (sals.nelts == 1);
7623 resolve_sal_pc (&sals.sals[0]);
7624 if (b->condition_not_parsed && s && s[0])
7626 char *cond_string = 0;
7630 find_condition_and_thread (s, sals.sals[0].pc,
7631 &cond_string, &thread, &task);
7633 b->cond_string = cond_string;
7636 b->condition_not_parsed = 0;
7638 expanded = expand_line_sal_maybe (sals.sals[0]);
7639 cleanups = make_cleanup (xfree, sals.sals);
7640 update_breakpoint_locations (b, expanded);
7641 do_cleanups (cleanups);
7645 case bp_hardware_watchpoint:
7646 case bp_read_watchpoint:
7647 case bp_access_watchpoint:
7648 /* Watchpoint can be either on expression using entirely global variables,
7649 or it can be on local variables.
7651 Watchpoints of the first kind are never auto-deleted, and even persist
7652 across program restarts. Since they can use variables from shared
7653 libraries, we need to reparse expression as libraries are loaded
7656 Watchpoints on local variables can also change meaning as result
7657 of solib event. For example, if a watchpoint uses both a local and
7658 a global variables in expression, it's a local watchpoint, but
7659 unloading of a shared library will make the expression invalid.
7660 This is not a very common use case, but we still re-evaluate
7661 expression, to avoid surprises to the user.
7663 Note that for local watchpoints, we re-evaluate it only if
7664 watchpoints frame id is still valid. If it's not, it means
7665 the watchpoint is out of scope and will be deleted soon. In fact,
7666 I'm not sure we'll ever be called in this case.
7668 If a local watchpoint's frame id is still valid, then
7669 b->exp_valid_block is likewise valid, and we can safely use it.
7671 Don't do anything about disabled watchpoints, since they will
7672 be reevaluated again when enabled. */
7673 update_watchpoint (b, 1 /* reparse */);
7675 /* We needn't really do anything to reset these, since the mask
7676 that requests them is unaffected by e.g., new libraries being
7682 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b->type);
7684 /* Delete overlay event breakpoints; they will be reset later by
7685 breakpoint_re_set. */
7686 case bp_overlay_event:
7687 delete_breakpoint (b);
7690 /* This breakpoint is special, it's set up when the inferior
7691 starts and we really don't want to touch it. */
7692 case bp_shlib_event:
7694 /* Like bp_shlib_event, this breakpoint type is special.
7695 Once it is set up, we do not want to touch it. */
7696 case bp_thread_event:
7698 /* Keep temporary breakpoints, which can be encountered when we step
7699 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7700 Otherwise these should have been blown away via the cleanup chain
7701 or by breakpoint_init_inferior when we rerun the executable. */
7704 case bp_watchpoint_scope:
7706 case bp_step_resume:
7708 case bp_longjmp_resume:
7715 /* Re-set all breakpoints after symbols have been re-loaded.
7717 If OBJFILE is non-null, create overlay break point only in OBJFILE
7718 (speed optimization). Otherwise rescan all loaded objfiles. */
7721 breakpoint_re_set_objfile (struct objfile *objfile)
7723 struct breakpoint *b, *temp;
7724 enum language save_language;
7725 int save_input_radix;
7727 save_language = current_language->la_language;
7728 save_input_radix = input_radix;
7729 ALL_BREAKPOINTS_SAFE (b, temp)
7731 /* Format possible error msg */
7732 char *message = xstrprintf ("Error in re-setting breakpoint %d: ",
7734 struct cleanup *cleanups = make_cleanup (xfree, message);
7735 catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
7736 do_cleanups (cleanups);
7738 set_language (save_language);
7739 input_radix = save_input_radix;
7741 if (objfile == NULL)
7742 ALL_OBJFILES (objfile)
7743 create_overlay_event_breakpoint ("_ovly_debug_event", objfile);
7745 create_overlay_event_breakpoint ("_ovly_debug_event", objfile);
7748 /* Re-set all breakpoints after symbols have been re-loaded. */
7751 breakpoint_re_set (void)
7753 breakpoint_re_set_objfile (NULL);
7756 /* Reset the thread number of this breakpoint:
7758 - If the breakpoint is for all threads, leave it as-is.
7759 - Else, reset it to the current thread for inferior_ptid. */
7761 breakpoint_re_set_thread (struct breakpoint *b)
7763 if (b->thread != -1)
7765 if (in_thread_list (inferior_ptid))
7766 b->thread = pid_to_thread_id (inferior_ptid);
7770 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7771 If from_tty is nonzero, it prints a message to that effect,
7772 which ends with a period (no newline). */
7775 set_ignore_count (int bptnum, int count, int from_tty)
7777 struct breakpoint *b;
7783 if (b->number == bptnum)
7785 b->ignore_count = count;
7789 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7791 else if (count == 1)
7792 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7795 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7798 breakpoints_changed ();
7799 observer_notify_breakpoint_modified (b->number);
7803 error (_("No breakpoint number %d."), bptnum);
7807 make_breakpoint_silent (struct breakpoint *b)
7809 /* Silence the breakpoint. */
7813 /* Command to set ignore-count of breakpoint N to COUNT. */
7816 ignore_command (char *args, int from_tty)
7822 error_no_arg (_("a breakpoint number"));
7824 num = get_number (&p);
7826 error (_("bad breakpoint number: '%s'"), args);
7828 error (_("Second argument (specified ignore-count) is missing."));
7830 set_ignore_count (num,
7831 longest_to_int (value_as_long (parse_and_eval (p))),
7834 printf_filtered ("\n");
7837 /* Call FUNCTION on each of the breakpoints
7838 whose numbers are given in ARGS. */
7841 map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *))
7846 struct breakpoint *b, *tmp;
7850 error_no_arg (_("one or more breakpoint numbers"));
7857 num = get_number_or_range (&p1);
7860 warning (_("bad breakpoint number at or near '%s'"), p);
7864 ALL_BREAKPOINTS_SAFE (b, tmp)
7865 if (b->number == num)
7867 struct breakpoint *related_breakpoint = b->related_breakpoint;
7870 if (related_breakpoint)
7871 function (related_breakpoint);
7875 printf_unfiltered (_("No breakpoint number %d.\n"), num);
7881 static struct bp_location *
7882 find_location_by_number (char *number)
7884 char *dot = strchr (number, '.');
7888 struct breakpoint *b;
7889 struct bp_location *loc;
7894 bp_num = get_number_or_range (&p1);
7896 error (_("Bad breakpoint number '%s'"), number);
7899 if (b->number == bp_num)
7904 if (!b || b->number != bp_num)
7905 error (_("Bad breakpoint number '%s'"), number);
7908 loc_num = get_number_or_range (&p1);
7910 error (_("Bad breakpoint location number '%s'"), number);
7914 for (;loc_num && loc; --loc_num, loc = loc->next)
7917 error (_("Bad breakpoint location number '%s'"), dot+1);
7923 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7924 If from_tty is nonzero, it prints a message to that effect,
7925 which ends with a period (no newline). */
7928 disable_breakpoint (struct breakpoint *bpt)
7930 /* Never disable a watchpoint scope breakpoint; we want to
7931 hit them when we leave scope so we can delete both the
7932 watchpoint and its scope breakpoint at that time. */
7933 if (bpt->type == bp_watchpoint_scope)
7936 /* You can't disable permanent breakpoints. */
7937 if (bpt->enable_state == bp_permanent)
7940 bpt->enable_state = bp_disabled;
7942 update_global_location_list (0);
7944 observer_notify_breakpoint_modified (bpt->number);
7948 disable_command (char *args, int from_tty)
7950 struct breakpoint *bpt;
7952 ALL_BREAKPOINTS (bpt)
7956 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7962 case bp_hardware_breakpoint:
7964 case bp_hardware_watchpoint:
7965 case bp_read_watchpoint:
7966 case bp_access_watchpoint:
7967 disable_breakpoint (bpt);
7971 else if (strchr (args, '.'))
7973 struct bp_location *loc = find_location_by_number (args);
7976 update_global_location_list (0);
7979 map_breakpoint_numbers (args, disable_breakpoint);
7983 do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition)
7985 int target_resources_ok, other_type_used;
7988 if (bpt->type == bp_hardware_breakpoint)
7991 i = hw_breakpoint_used_count ();
7992 target_resources_ok =
7993 target_can_use_hardware_watchpoint (bp_hardware_breakpoint,
7995 if (target_resources_ok == 0)
7996 error (_("No hardware breakpoint support in the target."));
7997 else if (target_resources_ok < 0)
7998 error (_("Hardware breakpoints used exceeds limit."));
8001 if (bpt->type == bp_watchpoint ||
8002 bpt->type == bp_hardware_watchpoint ||
8003 bpt->type == bp_read_watchpoint ||
8004 bpt->type == bp_access_watchpoint)
8006 struct gdb_exception e;
8008 TRY_CATCH (e, RETURN_MASK_ALL)
8010 update_watchpoint (bpt, 1 /* reparse */);
8014 exception_fprintf (gdb_stderr, e, _("Cannot enable watchpoint %d: "),
8020 if (bpt->enable_state != bp_permanent)
8021 bpt->enable_state = bp_enabled;
8022 bpt->disposition = disposition;
8023 update_global_location_list (1);
8024 breakpoints_changed ();
8026 observer_notify_breakpoint_modified (bpt->number);
8031 enable_breakpoint (struct breakpoint *bpt)
8033 do_enable_breakpoint (bpt, bpt->disposition);
8036 /* The enable command enables the specified breakpoints (or all defined
8037 breakpoints) so they once again become (or continue to be) effective
8038 in stopping the inferior. */
8041 enable_command (char *args, int from_tty)
8043 struct breakpoint *bpt;
8045 ALL_BREAKPOINTS (bpt)
8049 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
8055 case bp_hardware_breakpoint:
8057 case bp_hardware_watchpoint:
8058 case bp_read_watchpoint:
8059 case bp_access_watchpoint:
8060 enable_breakpoint (bpt);
8064 else if (strchr (args, '.'))
8066 struct bp_location *loc = find_location_by_number (args);
8069 update_global_location_list (1);
8072 map_breakpoint_numbers (args, enable_breakpoint);
8076 enable_once_breakpoint (struct breakpoint *bpt)
8078 do_enable_breakpoint (bpt, disp_disable);
8082 enable_once_command (char *args, int from_tty)
8084 map_breakpoint_numbers (args, enable_once_breakpoint);
8088 enable_delete_breakpoint (struct breakpoint *bpt)
8090 do_enable_breakpoint (bpt, disp_del);
8094 enable_delete_command (char *args, int from_tty)
8096 map_breakpoint_numbers (args, enable_delete_breakpoint);
8100 set_breakpoint_cmd (char *args, int from_tty)
8105 show_breakpoint_cmd (char *args, int from_tty)
8109 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
8111 struct symtabs_and_lines
8112 decode_line_spec_1 (char *string, int funfirstline)
8114 struct symtabs_and_lines sals;
8116 error (_("Empty line specification."));
8117 if (default_breakpoint_valid)
8118 sals = decode_line_1 (&string, funfirstline,
8119 default_breakpoint_symtab,
8120 default_breakpoint_line,
8121 (char ***) NULL, NULL);
8123 sals = decode_line_1 (&string, funfirstline,
8124 (struct symtab *) NULL, 0, (char ***) NULL, NULL);
8126 error (_("Junk at end of line specification: %s"), string);
8130 /* Create and insert a raw software breakpoint at PC. Return an
8131 identifier, which should be used to remove the breakpoint later.
8132 In general, places which call this should be using something on the
8133 breakpoint chain instead; this function should be eliminated
8137 deprecated_insert_raw_breakpoint (CORE_ADDR pc)
8139 struct bp_target_info *bp_tgt;
8141 bp_tgt = xmalloc (sizeof (struct bp_target_info));
8142 memset (bp_tgt, 0, sizeof (struct bp_target_info));
8144 bp_tgt->placed_address = pc;
8145 if (target_insert_breakpoint (bp_tgt) != 0)
8147 /* Could not insert the breakpoint. */
8155 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
8158 deprecated_remove_raw_breakpoint (void *bp)
8160 struct bp_target_info *bp_tgt = bp;
8163 ret = target_remove_breakpoint (bp_tgt);
8169 /* One (or perhaps two) breakpoints used for software single stepping. */
8171 static void *single_step_breakpoints[2];
8173 /* Create and insert a breakpoint for software single step. */
8176 insert_single_step_breakpoint (CORE_ADDR next_pc)
8180 if (single_step_breakpoints[0] == NULL)
8181 bpt_p = &single_step_breakpoints[0];
8184 gdb_assert (single_step_breakpoints[1] == NULL);
8185 bpt_p = &single_step_breakpoints[1];
8188 /* NOTE drow/2006-04-11: A future improvement to this function would be
8189 to only create the breakpoints once, and actually put them on the
8190 breakpoint chain. That would let us use set_raw_breakpoint. We could
8191 adjust the addresses each time they were needed. Doing this requires
8192 corresponding changes elsewhere where single step breakpoints are
8193 handled, however. So, for now, we use this. */
8195 *bpt_p = deprecated_insert_raw_breakpoint (next_pc);
8197 error (_("Could not insert single-step breakpoint at 0x%s"),
8198 paddr_nz (next_pc));
8201 /* Remove and delete any breakpoints used for software single step. */
8204 remove_single_step_breakpoints (void)
8206 gdb_assert (single_step_breakpoints[0] != NULL);
8208 /* See insert_single_step_breakpoint for more about this deprecated
8210 deprecated_remove_raw_breakpoint (single_step_breakpoints[0]);
8211 single_step_breakpoints[0] = NULL;
8213 if (single_step_breakpoints[1] != NULL)
8215 deprecated_remove_raw_breakpoint (single_step_breakpoints[1]);
8216 single_step_breakpoints[1] = NULL;
8220 /* Check whether a software single-step breakpoint is inserted at PC. */
8223 single_step_breakpoint_inserted_here_p (CORE_ADDR pc)
8227 for (i = 0; i < 2; i++)
8229 struct bp_target_info *bp_tgt = single_step_breakpoints[i];
8230 if (bp_tgt && bp_tgt->placed_address == pc)
8237 /* Tracepoint-specific operations. */
8239 /* Set tracepoint count to NUM. */
8241 set_tracepoint_count (int num)
8243 tracepoint_count = num;
8244 set_internalvar (lookup_internalvar ("tpnum"),
8245 value_from_longest (builtin_type_int32, (LONGEST) num));
8249 trace_command (char *arg, int from_tty)
8251 break_command_really (arg,
8252 NULL, 0, 1 /* parse arg */,
8253 0 /* tempflag */, 0 /* hardwareflag */,
8255 0 /* Ignore count */,
8256 pending_break_support,
8260 set_tracepoint_count (breakpoint_count);
8263 /* Print information on tracepoint number TPNUM_EXP, or all if
8267 tracepoints_info (char *tpnum_exp, int from_tty)
8269 struct breakpoint *b;
8270 int tps_to_list = 0;
8272 /* In the no-arguments case, say "No tracepoints" if none found. */
8285 ui_out_message (uiout, 0, "No tracepoints.\n");
8290 /* Otherwise be the same as "info break". */
8291 breakpoints_info (tpnum_exp, from_tty);
8294 /* The 'enable trace' command enables tracepoints.
8295 Not supported by all targets. */
8297 enable_trace_command (char *args, int from_tty)
8299 enable_command (args, from_tty);
8302 /* The 'disable trace' command disables tracepoints.
8303 Not supported by all targets. */
8305 disable_trace_command (char *args, int from_tty)
8307 disable_command (args, from_tty);
8310 /* Remove a tracepoint (or all if no argument) */
8312 delete_trace_command (char *arg, int from_tty)
8314 struct breakpoint *b, *temp;
8320 int breaks_to_delete = 0;
8322 /* Delete all breakpoints if no argument.
8323 Do not delete internal or call-dummy breakpoints, these
8324 have to be deleted with an explicit breakpoint number argument. */
8329 breaks_to_delete = 1;
8334 /* Ask user only if there are some breakpoints to delete. */
8336 || (breaks_to_delete && query (_("Delete all tracepoints? "))))
8338 ALL_BREAKPOINTS_SAFE (b, temp)
8340 if (b->type == bp_tracepoint &&
8342 delete_breakpoint (b);
8347 map_breakpoint_numbers (arg, delete_breakpoint);
8350 /* Set passcount for tracepoint.
8352 First command argument is passcount, second is tracepoint number.
8353 If tracepoint number omitted, apply to most recently defined.
8354 Also accepts special argument "all". */
8357 trace_pass_command (char *args, int from_tty)
8359 struct breakpoint *t1 = (struct breakpoint *) -1, *t2;
8363 if (args == 0 || *args == 0)
8364 error (_("passcount command requires an argument (count + optional TP num)"));
8366 count = strtoul (args, &args, 10); /* Count comes first, then TP num. */
8368 while (*args && isspace ((int) *args))
8371 if (*args && strncasecmp (args, "all", 3) == 0)
8373 args += 3; /* Skip special argument "all". */
8376 error (_("Junk at end of arguments."));
8379 t1 = get_tracepoint_by_number (&args, 1, 1);
8385 ALL_TRACEPOINTS (t2)
8386 if (t1 == (struct breakpoint *) -1 || t1 == t2)
8388 t2->pass_count = count;
8389 observer_notify_tracepoint_modified (t2->number);
8391 printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
8395 t1 = get_tracepoint_by_number (&args, 1, 0);
8402 get_tracepoint (int num)
8404 struct breakpoint *t;
8407 if (t->number == num)
8413 /* Utility: parse a tracepoint number and look it up in the list.
8414 If MULTI_P is true, there might be a range of tracepoints in ARG.
8415 if OPTIONAL_P is true, then if the argument is missing, the most
8416 recent tracepoint (tracepoint_count) is returned. */
8418 get_tracepoint_by_number (char **arg, int multi_p, int optional_p)
8420 extern int tracepoint_count;
8421 struct breakpoint *t;
8423 char *instring = arg == NULL ? NULL : *arg;
8425 if (arg == NULL || *arg == NULL || ! **arg)
8428 tpnum = tracepoint_count;
8430 error_no_arg (_("tracepoint number"));
8433 tpnum = multi_p ? get_number_or_range (arg) : get_number (arg);
8437 if (instring && *instring)
8438 printf_filtered (_("bad tracepoint number at or near '%s'\n"),
8441 printf_filtered (_("Tracepoint argument missing and no previous tracepoint\n"));
8446 if (t->number == tpnum)
8451 /* FIXME: if we are in the middle of a range we don't want to give
8452 a message. The current interface to get_number_or_range doesn't
8453 allow us to discover this. */
8454 printf_unfiltered ("No tracepoint number %d.\n", tpnum);
8458 /* save-tracepoints command */
8460 tracepoint_save_command (char *args, int from_tty)
8462 struct breakpoint *tp;
8464 struct action_line *line;
8466 char *i1 = " ", *i2 = " ";
8467 char *indent, *actionline, *pathname;
8469 struct cleanup *cleanup;
8471 if (args == 0 || *args == 0)
8472 error (_("Argument required (file name in which to save tracepoints)"));
8474 /* See if we have anything to save. */
8475 ALL_TRACEPOINTS (tp)
8482 warning (_("save-tracepoints: no tracepoints to save."));
8486 pathname = tilde_expand (args);
8487 cleanup = make_cleanup (xfree, pathname);
8488 if (!(fp = fopen (pathname, "w")))
8489 error (_("Unable to open file '%s' for saving tracepoints (%s)"),
8490 args, safe_strerror (errno));
8491 make_cleanup_fclose (fp);
8493 ALL_TRACEPOINTS (tp)
8495 if (tp->addr_string)
8496 fprintf (fp, "trace %s\n", tp->addr_string);
8499 sprintf_vma (tmp, tp->loc->address);
8500 fprintf (fp, "trace *0x%s\n", tmp);
8504 fprintf (fp, " passcount %d\n", tp->pass_count);
8508 fprintf (fp, " actions\n");
8510 for (line = tp->actions; line; line = line->next)
8512 struct cmd_list_element *cmd;
8514 QUIT; /* allow user to bail out with ^C */
8515 actionline = line->action;
8516 while (isspace ((int) *actionline))
8519 fprintf (fp, "%s%s\n", indent, actionline);
8520 if (*actionline != '#') /* skip for comment lines */
8522 cmd = lookup_cmd (&actionline, cmdlist, "", -1, 1);
8524 error (_("Bad action list item: %s"), actionline);
8525 if (cmd_cfunc_eq (cmd, while_stepping_pseudocommand))
8527 else if (cmd_cfunc_eq (cmd, end_actions_pseudocommand))
8533 do_cleanups (cleanup);
8535 printf_filtered (_("Tracepoints saved to file '%s'.\n"), args);
8539 /* Create a vector of all tracepoints. */
8544 VEC(breakpoint_p) *tp_vec = 0;
8545 struct breakpoint *tp;
8547 ALL_TRACEPOINTS (tp)
8549 VEC_safe_push (breakpoint_p, tp_vec, tp);
8556 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8557 It is defined as a macro to prevent duplication.
8558 COMMAND should be a string constant containing the name of the command. */
8559 #define BREAK_ARGS_HELP(command) \
8560 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8561 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8562 If a line number is specified, break at start of code for that line.\n\
8563 If a function is specified, break at start of code for that function.\n\
8564 If an address is specified, break at that exact address.\n\
8565 With no LOCATION, uses current execution address of selected stack frame.\n\
8566 This is useful for breaking on return to a stack frame.\n\
8568 THREADNUM is the number from \"info threads\".\n\
8569 CONDITION is a boolean expression.\n\
8571 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8573 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8575 /* List of subcommands for "catch". */
8576 static struct cmd_list_element *catch_cmdlist;
8578 /* List of subcommands for "tcatch". */
8579 static struct cmd_list_element *tcatch_cmdlist;
8581 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
8582 lists, and pass some additional user data to the command function. */
8584 add_catch_command (char *name, char *docstring,
8585 void (*sfunc) (char *args, int from_tty,
8586 struct cmd_list_element *command),
8587 void *user_data_catch,
8588 void *user_data_tcatch)
8590 struct cmd_list_element *command;
8592 command = add_cmd (name, class_breakpoint, NULL, docstring,
8594 set_cmd_sfunc (command, sfunc);
8595 set_cmd_context (command, user_data_catch);
8597 command = add_cmd (name, class_breakpoint, NULL, docstring,
8599 set_cmd_sfunc (command, sfunc);
8600 set_cmd_context (command, user_data_tcatch);
8604 _initialize_breakpoint (void)
8606 static struct cmd_list_element *breakpoint_set_cmdlist;
8607 static struct cmd_list_element *breakpoint_show_cmdlist;
8608 struct cmd_list_element *c;
8610 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib);
8612 breakpoint_chain = 0;
8613 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8614 before a breakpoint is set. */
8615 breakpoint_count = 0;
8617 tracepoint_count = 0;
8619 add_com ("ignore", class_breakpoint, ignore_command, _("\
8620 Set ignore-count of breakpoint number N to COUNT.\n\
8621 Usage is `ignore N COUNT'."));
8623 add_com_alias ("bc", "ignore", class_breakpoint, 1);
8625 add_com ("commands", class_breakpoint, commands_command, _("\
8626 Set commands to be executed when a breakpoint is hit.\n\
8627 Give breakpoint number as argument after \"commands\".\n\
8628 With no argument, the targeted breakpoint is the last one set.\n\
8629 The commands themselves follow starting on the next line.\n\
8630 Type a line containing \"end\" to indicate the end of them.\n\
8631 Give \"silent\" as the first line to make the breakpoint silent;\n\
8632 then no output is printed when it is hit, except what the commands print."));
8634 add_com ("condition", class_breakpoint, condition_command, _("\
8635 Specify breakpoint number N to break only if COND is true.\n\
8636 Usage is `condition N COND', where N is an integer and COND is an\n\
8637 expression to be evaluated whenever breakpoint N is reached."));
8639 c = add_com ("tbreak", class_breakpoint, tbreak_command, _("\
8640 Set a temporary breakpoint.\n\
8641 Like \"break\" except the breakpoint is only temporary,\n\
8642 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8643 by using \"enable delete\" on the breakpoint number.\n\
8645 BREAK_ARGS_HELP ("tbreak")));
8646 set_cmd_completer (c, location_completer);
8648 c = add_com ("hbreak", class_breakpoint, hbreak_command, _("\
8649 Set a hardware assisted breakpoint.\n\
8650 Like \"break\" except the breakpoint requires hardware support,\n\
8651 some target hardware may not have this support.\n\
8653 BREAK_ARGS_HELP ("hbreak")));
8654 set_cmd_completer (c, location_completer);
8656 c = add_com ("thbreak", class_breakpoint, thbreak_command, _("\
8657 Set a temporary hardware assisted breakpoint.\n\
8658 Like \"hbreak\" except the breakpoint is only temporary,\n\
8659 so it will be deleted when hit.\n\
8661 BREAK_ARGS_HELP ("thbreak")));
8662 set_cmd_completer (c, location_completer);
8664 add_prefix_cmd ("enable", class_breakpoint, enable_command, _("\
8665 Enable some breakpoints.\n\
8666 Give breakpoint numbers (separated by spaces) as arguments.\n\
8667 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8668 This is used to cancel the effect of the \"disable\" command.\n\
8669 With a subcommand you can enable temporarily."),
8670 &enablelist, "enable ", 1, &cmdlist);
8672 add_com ("ab", class_breakpoint, enable_command, _("\
8673 Enable some breakpoints.\n\
8674 Give breakpoint numbers (separated by spaces) as arguments.\n\
8675 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8676 This is used to cancel the effect of the \"disable\" command.\n\
8677 With a subcommand you can enable temporarily."));
8679 add_com_alias ("en", "enable", class_breakpoint, 1);
8681 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, _("\
8682 Enable some breakpoints.\n\
8683 Give breakpoint numbers (separated by spaces) as arguments.\n\
8684 This is used to cancel the effect of the \"disable\" command.\n\
8685 May be abbreviated to simply \"enable\".\n"),
8686 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
8688 add_cmd ("once", no_class, enable_once_command, _("\
8689 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8690 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8693 add_cmd ("delete", no_class, enable_delete_command, _("\
8694 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8695 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8698 add_cmd ("delete", no_class, enable_delete_command, _("\
8699 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8700 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8703 add_cmd ("once", no_class, enable_once_command, _("\
8704 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8705 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8708 add_prefix_cmd ("disable", class_breakpoint, disable_command, _("\
8709 Disable some breakpoints.\n\
8710 Arguments are breakpoint numbers with spaces in between.\n\
8711 To disable all breakpoints, give no argument.\n\
8712 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8713 &disablelist, "disable ", 1, &cmdlist);
8714 add_com_alias ("dis", "disable", class_breakpoint, 1);
8715 add_com_alias ("disa", "disable", class_breakpoint, 1);
8717 add_com ("sb", class_breakpoint, disable_command, _("\
8718 Disable some breakpoints.\n\
8719 Arguments are breakpoint numbers with spaces in between.\n\
8720 To disable all breakpoints, give no argument.\n\
8721 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8723 add_cmd ("breakpoints", class_alias, disable_command, _("\
8724 Disable some breakpoints.\n\
8725 Arguments are breakpoint numbers with spaces in between.\n\
8726 To disable all breakpoints, give no argument.\n\
8727 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8728 This command may be abbreviated \"disable\"."),
8731 add_prefix_cmd ("delete", class_breakpoint, delete_command, _("\
8732 Delete some breakpoints or auto-display expressions.\n\
8733 Arguments are breakpoint numbers with spaces in between.\n\
8734 To delete all breakpoints, give no argument.\n\
8736 Also a prefix command for deletion of other GDB objects.\n\
8737 The \"unset\" command is also an alias for \"delete\"."),
8738 &deletelist, "delete ", 1, &cmdlist);
8739 add_com_alias ("d", "delete", class_breakpoint, 1);
8740 add_com_alias ("del", "delete", class_breakpoint, 1);
8742 add_com ("db", class_breakpoint, delete_command, _("\
8743 Delete some breakpoints.\n\
8744 Arguments are breakpoint numbers with spaces in between.\n\
8745 To delete all breakpoints, give no argument.\n"));
8747 add_cmd ("breakpoints", class_alias, delete_command, _("\
8748 Delete some breakpoints or auto-display expressions.\n\
8749 Arguments are breakpoint numbers with spaces in between.\n\
8750 To delete all breakpoints, give no argument.\n\
8751 This command may be abbreviated \"delete\"."),
8754 add_com ("clear", class_breakpoint, clear_command, _("\
8755 Clear breakpoint at specified line or function.\n\
8756 Argument may be line number, function name, or \"*\" and an address.\n\
8757 If line number is specified, all breakpoints in that line are cleared.\n\
8758 If function is specified, breakpoints at beginning of function are cleared.\n\
8759 If an address is specified, breakpoints at that address are cleared.\n\
8761 With no argument, clears all breakpoints in the line that the selected frame\n\
8764 See also the \"delete\" command which clears breakpoints by number."));
8766 c = add_com ("break", class_breakpoint, break_command, _("\
8767 Set breakpoint at specified line or function.\n"
8768 BREAK_ARGS_HELP ("break")));
8769 set_cmd_completer (c, location_completer);
8771 add_com_alias ("b", "break", class_run, 1);
8772 add_com_alias ("br", "break", class_run, 1);
8773 add_com_alias ("bre", "break", class_run, 1);
8774 add_com_alias ("brea", "break", class_run, 1);
8778 add_com_alias ("ba", "break", class_breakpoint, 1);
8779 add_com_alias ("bu", "ubreak", class_breakpoint, 1);
8784 add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command, _("\
8785 Break in function/address or break at a line in the current file."),
8786 &stoplist, "stop ", 1, &cmdlist);
8787 add_cmd ("in", class_breakpoint, stopin_command,
8788 _("Break in function or address."), &stoplist);
8789 add_cmd ("at", class_breakpoint, stopat_command,
8790 _("Break at a line in the current file."), &stoplist);
8791 add_com ("status", class_info, breakpoints_info, _("\
8792 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8793 The \"Type\" column indicates one of:\n\
8794 \tbreakpoint - normal breakpoint\n\
8795 \twatchpoint - watchpoint\n\
8796 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8797 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8798 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8799 address and file/line number respectively.\n\
8801 Convenience variable \"$_\" and default examine address for \"x\"\n\
8802 are set to the address of the last breakpoint listed unless the command\n\
8803 is prefixed with \"server \".\n\n\
8804 Convenience variable \"$bpnum\" contains the number of the last\n\
8808 add_info ("breakpoints", breakpoints_info, _("\
8809 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8810 The \"Type\" column indicates one of:\n\
8811 \tbreakpoint - normal breakpoint\n\
8812 \twatchpoint - watchpoint\n\
8813 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8814 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8815 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8816 address and file/line number respectively.\n\
8818 Convenience variable \"$_\" and default examine address for \"x\"\n\
8819 are set to the address of the last breakpoint listed unless the command\n\
8820 is prefixed with \"server \".\n\n\
8821 Convenience variable \"$bpnum\" contains the number of the last\n\
8825 add_com ("lb", class_breakpoint, breakpoints_info, _("\
8826 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8827 The \"Type\" column indicates one of:\n\
8828 \tbreakpoint - normal breakpoint\n\
8829 \twatchpoint - watchpoint\n\
8830 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8831 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8832 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8833 address and file/line number respectively.\n\
8835 Convenience variable \"$_\" and default examine address for \"x\"\n\
8836 are set to the address of the last breakpoint listed unless the command\n\
8837 is prefixed with \"server \".\n\n\
8838 Convenience variable \"$bpnum\" contains the number of the last\n\
8841 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, _("\
8842 Status of all breakpoints, or breakpoint number NUMBER.\n\
8843 The \"Type\" column indicates one of:\n\
8844 \tbreakpoint - normal breakpoint\n\
8845 \twatchpoint - watchpoint\n\
8846 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8847 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8848 \tuntil - internal breakpoint used by the \"until\" command\n\
8849 \tfinish - internal breakpoint used by the \"finish\" command\n\
8850 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8851 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8852 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8853 address and file/line number respectively.\n\
8855 Convenience variable \"$_\" and default examine address for \"x\"\n\
8856 are set to the address of the last breakpoint listed unless the command\n\
8857 is prefixed with \"server \".\n\n\
8858 Convenience variable \"$bpnum\" contains the number of the last\n\
8860 &maintenanceinfolist);
8862 add_prefix_cmd ("catch", class_breakpoint, catch_command, _("\
8863 Set catchpoints to catch events."),
8864 &catch_cmdlist, "catch ",
8865 0/*allow-unknown*/, &cmdlist);
8867 add_prefix_cmd ("tcatch", class_breakpoint, tcatch_command, _("\
8868 Set temporary catchpoints to catch events."),
8869 &tcatch_cmdlist, "tcatch ",
8870 0/*allow-unknown*/, &cmdlist);
8872 /* Add catch and tcatch sub-commands. */
8873 add_catch_command ("catch", _("\
8874 Catch an exception, when caught.\n\
8875 With an argument, catch only exceptions with the given name."),
8876 catch_catch_command,
8879 add_catch_command ("throw", _("\
8880 Catch an exception, when thrown.\n\
8881 With an argument, catch only exceptions with the given name."),
8882 catch_throw_command,
8885 add_catch_command ("fork", _("Catch calls to fork."),
8886 catch_fork_command_1,
8887 (void *) (uintptr_t) catch_fork_permanent,
8888 (void *) (uintptr_t) catch_fork_temporary);
8889 add_catch_command ("vfork", _("Catch calls to vfork."),
8890 catch_fork_command_1,
8891 (void *) (uintptr_t) catch_vfork_permanent,
8892 (void *) (uintptr_t) catch_vfork_temporary);
8893 add_catch_command ("exec", _("Catch calls to exec."),
8894 catch_exec_command_1,
8897 add_catch_command ("exception", _("\
8898 Catch Ada exceptions, when raised.\n\
8899 With an argument, catch only exceptions with the given name."),
8900 catch_ada_exception_command,
8903 add_catch_command ("assert", _("\
8904 Catch failed Ada assertions, when raised.\n\
8905 With an argument, catch only exceptions with the given name."),
8906 catch_assert_command,
8910 c = add_com ("watch", class_breakpoint, watch_command, _("\
8911 Set a watchpoint for an expression.\n\
8912 A watchpoint stops execution of your program whenever the value of\n\
8913 an expression changes."));
8914 set_cmd_completer (c, expression_completer);
8916 c = add_com ("rwatch", class_breakpoint, rwatch_command, _("\
8917 Set a read watchpoint for an expression.\n\
8918 A watchpoint stops execution of your program whenever the value of\n\
8919 an expression is read."));
8920 set_cmd_completer (c, expression_completer);
8922 c = add_com ("awatch", class_breakpoint, awatch_command, _("\
8923 Set a watchpoint for an expression.\n\
8924 A watchpoint stops execution of your program whenever the value of\n\
8925 an expression is either read or written."));
8926 set_cmd_completer (c, expression_completer);
8928 add_info ("watchpoints", breakpoints_info,
8929 _("Synonym for ``info breakpoints''."));
8932 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8933 respond to changes - contrary to the description. */
8934 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support,
8935 &can_use_hw_watchpoints, _("\
8936 Set debugger's willingness to use watchpoint hardware."), _("\
8937 Show debugger's willingness to use watchpoint hardware."), _("\
8938 If zero, gdb will not use hardware for new watchpoints, even if\n\
8939 such is available. (However, any hardware watchpoints that were\n\
8940 created before setting this to nonzero, will continue to use watchpoint\n\
8943 show_can_use_hw_watchpoints,
8944 &setlist, &showlist);
8946 can_use_hw_watchpoints = 1;
8948 /* Tracepoint manipulation commands. */
8950 c = add_com ("trace", class_breakpoint, trace_command, _("\
8951 Set a tracepoint at specified line or function.\n\
8953 BREAK_ARGS_HELP ("trace") "\n\
8954 Do \"help tracepoints\" for info on other tracepoint commands."));
8955 set_cmd_completer (c, location_completer);
8957 add_com_alias ("tp", "trace", class_alias, 0);
8958 add_com_alias ("tr", "trace", class_alias, 1);
8959 add_com_alias ("tra", "trace", class_alias, 1);
8960 add_com_alias ("trac", "trace", class_alias, 1);
8962 add_info ("tracepoints", tracepoints_info, _("\
8963 Status of tracepoints, or tracepoint number NUMBER.\n\
8964 Convenience variable \"$tpnum\" contains the number of the\n\
8965 last tracepoint set."));
8967 add_info_alias ("tp", "tracepoints", 1);
8969 add_cmd ("tracepoints", class_trace, delete_trace_command, _("\
8970 Delete specified tracepoints.\n\
8971 Arguments are tracepoint numbers, separated by spaces.\n\
8972 No argument means delete all tracepoints."),
8975 c = add_cmd ("tracepoints", class_trace, disable_trace_command, _("\
8976 Disable specified tracepoints.\n\
8977 Arguments are tracepoint numbers, separated by spaces.\n\
8978 No argument means disable all tracepoints."),
8980 deprecate_cmd (c, "disable");
8982 c = add_cmd ("tracepoints", class_trace, enable_trace_command, _("\
8983 Enable specified tracepoints.\n\
8984 Arguments are tracepoint numbers, separated by spaces.\n\
8985 No argument means enable all tracepoints."),
8987 deprecate_cmd (c, "enable");
8989 add_com ("passcount", class_trace, trace_pass_command, _("\
8990 Set the passcount for a tracepoint.\n\
8991 The trace will end when the tracepoint has been passed 'count' times.\n\
8992 Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
8993 if TPNUM is omitted, passcount refers to the last tracepoint defined."));
8995 c = add_com ("save-tracepoints", class_trace, tracepoint_save_command, _("\
8996 Save current tracepoint definitions as a script.\n\
8997 Use the 'source' command in another debug session to restore them."));
8998 set_cmd_completer (c, filename_completer);
9000 add_prefix_cmd ("breakpoint", class_maintenance, set_breakpoint_cmd, _("\
9001 Breakpoint specific settings\n\
9002 Configure various breakpoint-specific variables such as\n\
9003 pending breakpoint behavior"),
9004 &breakpoint_set_cmdlist, "set breakpoint ",
9005 0/*allow-unknown*/, &setlist);
9006 add_prefix_cmd ("breakpoint", class_maintenance, show_breakpoint_cmd, _("\
9007 Breakpoint specific settings\n\
9008 Configure various breakpoint-specific variables such as\n\
9009 pending breakpoint behavior"),
9010 &breakpoint_show_cmdlist, "show breakpoint ",
9011 0/*allow-unknown*/, &showlist);
9013 add_setshow_auto_boolean_cmd ("pending", no_class,
9014 &pending_break_support, _("\
9015 Set debugger's behavior regarding pending breakpoints."), _("\
9016 Show debugger's behavior regarding pending breakpoints."), _("\
9017 If on, an unrecognized breakpoint location will cause gdb to create a\n\
9018 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
9019 an error. If auto, an unrecognized breakpoint location results in a\n\
9020 user-query to see if a pending breakpoint should be created."),
9022 show_pending_break_support,
9023 &breakpoint_set_cmdlist,
9024 &breakpoint_show_cmdlist);
9026 pending_break_support = AUTO_BOOLEAN_AUTO;
9028 add_setshow_boolean_cmd ("auto-hw", no_class,
9029 &automatic_hardware_breakpoints, _("\
9030 Set automatic usage of hardware breakpoints."), _("\
9031 Show automatic usage of hardware breakpoints."), _("\
9032 If set, the debugger will automatically use hardware breakpoints for\n\
9033 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
9034 a warning will be emitted for such breakpoints."),
9036 show_automatic_hardware_breakpoints,
9037 &breakpoint_set_cmdlist,
9038 &breakpoint_show_cmdlist);
9040 add_setshow_enum_cmd ("always-inserted", class_support,
9041 always_inserted_enums, &always_inserted_mode, _("\
9042 Set mode for inserting breakpoints."), _("\
9043 Show mode for inserting breakpoints."), _("\
9044 When this mode is off, breakpoints are inserted in inferior when it is\n\
9045 resumed, and removed when execution stops. When this mode is on,\n\
9046 breakpoints are inserted immediately and removed only when the user\n\
9047 deletes the breakpoint. When this mode is auto (which is the default),\n\
9048 the behaviour depends on the non-stop setting (see help set non-stop).\n\
9049 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
9050 behaves as if always-inserted mode is on; if gdb is controlling the\n\
9051 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
9053 &show_always_inserted_mode,
9054 &breakpoint_set_cmdlist,
9055 &breakpoint_show_cmdlist);
9057 automatic_hardware_breakpoints = 1;
9059 observer_attach_about_to_proceed (breakpoint_about_to_proceed);