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"
29 #include "expression.h"
35 #include "gdbthread.h"
38 #include "gdb_string.h"
45 #include "completer.h"
48 #include "cli/cli-script.h"
49 #include "gdb_assert.h"
54 #include "exceptions.h"
61 #include "mi/mi-common.h"
63 /* Arguments to pass as context to some catch command handlers. */
64 #define CATCH_PERMANENT ((void *) (uintptr_t) 0)
65 #define CATCH_TEMPORARY ((void *) (uintptr_t) 1)
67 /* Prototypes for local functions. */
69 static void enable_delete_command (char *, int);
71 static void enable_delete_breakpoint (struct breakpoint
*);
73 static void enable_once_command (char *, int);
75 static void enable_once_breakpoint (struct breakpoint
*);
77 static void disable_command (char *, int);
79 static void enable_command (char *, int);
81 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
83 static void ignore_command (char *, int);
85 static int breakpoint_re_set_one (void *);
87 static void clear_command (char *, int);
89 static void catch_command (char *, int);
91 static void watch_command (char *, int);
93 static int can_use_hardware_watchpoint (struct value
*);
95 static void break_command_1 (char *, int, int);
97 static void mention (struct breakpoint
*);
99 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
101 static void check_duplicates (struct breakpoint
*);
103 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
105 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
108 static void describe_other_breakpoints (CORE_ADDR
, struct obj_section
*, int);
110 static void breakpoints_info (char *, int);
112 static void breakpoint_1 (int, int);
114 static bpstat
bpstat_alloc (const struct bp_location
*, bpstat
);
116 static int breakpoint_cond_eval (void *);
118 static void cleanup_executing_breakpoints (void *);
120 static void commands_command (char *, int);
122 static void condition_command (char *, int);
124 static int get_number_trailer (char **, int);
126 void set_breakpoint_count (int);
135 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
137 static enum print_stop_action
print_it_typical (bpstat
);
139 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
141 static int watchpoint_check (void *);
143 static void maintenance_info_breakpoints (char *, int);
145 static void create_overlay_event_breakpoint (char *);
147 static int hw_breakpoint_used_count (void);
149 static int hw_watchpoint_used_count (enum bptype
, int *);
151 static void hbreak_command (char *, int);
153 static void thbreak_command (char *, int);
155 static void watch_command_1 (char *, int, int);
157 static void rwatch_command (char *, int);
159 static void awatch_command (char *, int);
161 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
163 static void stop_command (char *arg
, int from_tty
);
165 static void stopin_command (char *arg
, int from_tty
);
167 static void stopat_command (char *arg
, int from_tty
);
169 static char *ep_parse_optional_if_clause (char **arg
);
171 static char *ep_parse_optional_filename (char **arg
);
173 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
174 char *arg
, int tempflag
, int from_tty
);
176 static void tcatch_command (char *arg
, int from_tty
);
178 static void ep_skip_leading_whitespace (char **s
);
180 static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc
);
182 static void free_bp_location (struct bp_location
*loc
);
184 static struct bp_location
*allocate_bp_location (struct breakpoint
*bpt
);
186 static void update_global_location_list (int);
188 static void update_global_location_list_nothrow (int);
190 static int is_hardware_watchpoint (struct breakpoint
*bpt
);
192 static void insert_breakpoint_locations (void);
195 bpdisp_text (enum bpdisp disp
)
197 /* NOTE: the following values are a part of MI protocol and represent
198 values of 'disp' field returned when inferior stops at a breakpoint. */
199 static char *bpdisps
[] = {"del", "dstp", "dis", "keep"};
200 return bpdisps
[(int) disp
];
203 /* Prototypes for exported functions. */
204 /* If FALSE, gdb will not use hardware support for watchpoints, even
205 if such is available. */
206 static int can_use_hw_watchpoints
;
209 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
210 struct cmd_list_element
*c
,
213 fprintf_filtered (file
, _("\
214 Debugger's willingness to use watchpoint hardware is %s.\n"),
218 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
219 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
220 for unrecognized breakpoint locations.
221 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
222 static enum auto_boolean pending_break_support
;
224 show_pending_break_support (struct ui_file
*file
, int from_tty
,
225 struct cmd_list_element
*c
,
228 fprintf_filtered (file
, _("\
229 Debugger's behavior regarding pending breakpoints is %s.\n"),
233 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
234 set with "break" but falling in read-only memory.
235 If 0, gdb will warn about such breakpoints, but won't automatically
236 use hardware breakpoints. */
237 static int automatic_hardware_breakpoints
;
239 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
240 struct cmd_list_element
*c
,
243 fprintf_filtered (file
, _("\
244 Automatic usage of hardware breakpoints is %s.\n"),
248 /* If on, gdb will keep breakpoints inserted even as inferior is
249 stopped, and immediately insert any new breakpoints. If off, gdb
250 will insert breakpoints into inferior only when resuming it, and
251 will remove breakpoints upon stop. If auto, GDB will behave as ON
252 if in non-stop mode, and as OFF if all-stop mode.*/
254 static const char always_inserted_auto
[] = "auto";
255 static const char always_inserted_on
[] = "on";
256 static const char always_inserted_off
[] = "off";
257 static const char *always_inserted_enums
[] = {
258 always_inserted_auto
,
263 static const char *always_inserted_mode
= always_inserted_auto
;
265 show_always_inserted_mode (struct ui_file
*file
, int from_tty
,
266 struct cmd_list_element
*c
, const char *value
)
268 if (always_inserted_mode
== always_inserted_auto
)
269 fprintf_filtered (file
, _("\
270 Always inserted breakpoint mode is %s (currently %s).\n"),
272 breakpoints_always_inserted_mode () ? "on" : "off");
274 fprintf_filtered (file
, _("Always inserted breakpoint mode is %s.\n"), value
);
278 breakpoints_always_inserted_mode (void)
280 return (always_inserted_mode
== always_inserted_on
281 || (always_inserted_mode
== always_inserted_auto
&& non_stop
));
284 void _initialize_breakpoint (void);
286 /* Are we executing breakpoint commands? */
287 static int executing_breakpoint_commands
;
289 /* Are overlay event breakpoints enabled? */
290 static int overlay_events_enabled
;
292 /* Walk the following statement or block through all breakpoints.
293 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
296 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
298 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
299 for (B = breakpoint_chain; \
300 B ? (TMP=B->next, 1): 0; \
303 /* Similar iterators for the low-level breakpoints. */
305 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->global_next)
307 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
308 for (B = bp_location_chain; \
309 B ? (TMP=B->global_next, 1): 0; \
312 /* Chains of all breakpoints defined. */
314 struct breakpoint
*breakpoint_chain
;
316 struct bp_location
*bp_location_chain
;
318 /* The locations that no longer correspond to any breakpoint,
319 unlinked from bp_location_chain, but for which a hit
320 may still be reported by a target. */
321 VEC(bp_location_p
) *moribund_locations
= NULL
;
323 /* Number of last breakpoint made. */
325 int breakpoint_count
;
327 /* Return whether a breakpoint is an active enabled breakpoint. */
329 breakpoint_enabled (struct breakpoint
*b
)
331 return (b
->enable_state
== bp_enabled
);
334 /* Set breakpoint count to NUM. */
337 set_breakpoint_count (int num
)
339 breakpoint_count
= num
;
340 set_internalvar (lookup_internalvar ("bpnum"),
341 value_from_longest (builtin_type_int32
, (LONGEST
) num
));
344 /* Used in run_command to zero the hit count when a new run starts. */
347 clear_breakpoint_hit_counts (void)
349 struct breakpoint
*b
;
355 /* Default address, symtab and line to put a breakpoint at
356 for "break" command with no arg.
357 if default_breakpoint_valid is zero, the other three are
358 not valid, and "break" with no arg is an error.
360 This set by print_stack_frame, which calls set_default_breakpoint. */
362 int default_breakpoint_valid
;
363 CORE_ADDR default_breakpoint_address
;
364 struct symtab
*default_breakpoint_symtab
;
365 int default_breakpoint_line
;
367 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
368 Advance *PP after the string and any trailing whitespace.
370 Currently the string can either be a number or "$" followed by the name
371 of a convenience variable. Making it an expression wouldn't work well
372 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
374 If the string is a NULL pointer, that denotes the last breakpoint.
376 TRAILER is a character which can be found after the number; most
377 commonly this is `-'. If you don't want a trailer, use \0. */
379 get_number_trailer (char **pp
, int trailer
)
381 int retval
= 0; /* default */
385 /* Empty line means refer to the last breakpoint. */
386 return breakpoint_count
;
389 /* Make a copy of the name, so we can null-terminate it
390 to pass to lookup_internalvar(). */
395 while (isalnum (*p
) || *p
== '_')
397 varname
= (char *) alloca (p
- start
+ 1);
398 strncpy (varname
, start
, p
- start
);
399 varname
[p
- start
] = '\0';
400 val
= value_of_internalvar (lookup_internalvar (varname
));
401 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
402 retval
= (int) value_as_long (val
);
405 printf_filtered (_("Convenience variable must have integer value.\n"));
413 while (*p
>= '0' && *p
<= '9')
416 /* There is no number here. (e.g. "cond a == b"). */
418 /* Skip non-numeric token */
419 while (*p
&& !isspace((int) *p
))
421 /* Return zero, which caller must interpret as error. */
427 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
429 /* Trailing junk: return 0 and let caller print error msg. */
430 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
441 /* Like get_number_trailer, but don't allow a trailer. */
443 get_number (char **pp
)
445 return get_number_trailer (pp
, '\0');
448 /* Parse a number or a range.
449 * A number will be of the form handled by get_number.
450 * A range will be of the form <number1> - <number2>, and
451 * will represent all the integers between number1 and number2,
454 * While processing a range, this fuction is called iteratively;
455 * At each call it will return the next value in the range.
457 * At the beginning of parsing a range, the char pointer PP will
458 * be advanced past <number1> and left pointing at the '-' token.
459 * Subsequent calls will not advance the pointer until the range
460 * is completed. The call that completes the range will advance
461 * pointer PP past <number2>.
465 get_number_or_range (char **pp
)
467 static int last_retval
, end_value
;
468 static char *end_ptr
;
469 static int in_range
= 0;
473 /* Default case: pp is pointing either to a solo number,
474 or to the first number of a range. */
475 last_retval
= get_number_trailer (pp
, '-');
480 /* This is the start of a range (<number1> - <number2>).
481 Skip the '-', parse and remember the second number,
482 and also remember the end of the final token. */
486 while (isspace ((int) *end_ptr
))
487 end_ptr
++; /* skip white space */
488 end_value
= get_number (temp
);
489 if (end_value
< last_retval
)
491 error (_("inverted range"));
493 else if (end_value
== last_retval
)
495 /* degenerate range (number1 == number2). Advance the
496 token pointer so that the range will be treated as a
505 error (_("negative value"));
508 /* pp points to the '-' that betokens a range. All
509 number-parsing has already been done. Return the next
510 integer value (one greater than the saved previous value).
511 Do not advance the token pointer 'pp' until the end of range
514 if (++last_retval
== end_value
)
516 /* End of range reached; advance token pointer. */
526 /* condition N EXP -- set break condition of breakpoint N to EXP. */
529 condition_command (char *arg
, int from_tty
)
531 struct breakpoint
*b
;
536 error_no_arg (_("breakpoint number"));
539 bnum
= get_number (&p
);
541 error (_("Bad breakpoint argument: '%s'"), arg
);
544 if (b
->number
== bnum
)
546 struct bp_location
*loc
= b
->loc
;
547 for (; loc
; loc
= loc
->next
)
555 if (b
->cond_string
!= NULL
)
556 xfree (b
->cond_string
);
560 b
->cond_string
= NULL
;
562 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
567 /* I don't know if it matters whether this is the string the user
568 typed in or the decompiled expression. */
569 b
->cond_string
= savestring (arg
, strlen (arg
));
570 b
->condition_not_parsed
= 0;
571 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
575 parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
577 error (_("Junk at end of expression"));
580 breakpoints_changed ();
581 observer_notify_breakpoint_modified (b
->number
);
585 error (_("No breakpoint number %d."), bnum
);
589 commands_command (char *arg
, int from_tty
)
591 struct breakpoint
*b
;
594 struct command_line
*l
;
596 /* If we allowed this, we would have problems with when to
597 free the storage, if we change the commands currently
600 if (executing_breakpoint_commands
)
601 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
604 bnum
= get_number (&p
);
607 error (_("Unexpected extra arguments following breakpoint number."));
610 if (b
->number
== bnum
)
612 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
614 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
615 l
= read_command_lines (tmpbuf
, from_tty
, 1);
616 do_cleanups (cleanups
);
617 free_command_lines (&b
->commands
);
619 breakpoints_changed ();
620 observer_notify_breakpoint_modified (b
->number
);
623 error (_("No breakpoint number %d."), bnum
);
626 /* Like commands_command, but instead of reading the commands from
627 input stream, takes them from an already parsed command structure.
629 This is used by cli-script.c to DTRT with breakpoint commands
630 that are part of if and while bodies. */
631 enum command_control_type
632 commands_from_control_command (char *arg
, struct command_line
*cmd
)
634 struct breakpoint
*b
;
638 /* If we allowed this, we would have problems with when to
639 free the storage, if we change the commands currently
642 if (executing_breakpoint_commands
)
643 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
645 /* An empty string for the breakpoint number means the last
646 breakpoint, but get_number expects a NULL pointer. */
651 bnum
= get_number (&p
);
654 error (_("Unexpected extra arguments following breakpoint number."));
657 if (b
->number
== bnum
)
659 free_command_lines (&b
->commands
);
660 if (cmd
->body_count
!= 1)
661 error (_("Invalid \"commands\" block structure."));
662 /* We need to copy the commands because if/while will free the
663 list after it finishes execution. */
664 b
->commands
= copy_command_lines (cmd
->body_list
[0]);
665 breakpoints_changed ();
666 observer_notify_breakpoint_modified (b
->number
);
667 return simple_control
;
669 error (_("No breakpoint number %d."), bnum
);
672 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
673 by replacing any memory breakpoints with their shadowed contents. */
676 breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
, LONGEST len
)
678 struct bp_location
*b
;
679 CORE_ADDR bp_addr
= 0;
685 if (b
->owner
->type
== bp_none
)
686 warning (_("reading through apparently deleted breakpoint #%d?"),
689 if (b
->loc_type
!= bp_loc_software_breakpoint
)
693 /* Addresses and length of the part of the breakpoint that
695 bp_addr
= b
->target_info
.placed_address
;
696 bp_size
= b
->target_info
.shadow_len
;
698 /* bp isn't valid, or doesn't shadow memory. */
701 if (bp_addr
+ bp_size
<= memaddr
)
702 /* The breakpoint is entirely before the chunk of memory we
706 if (bp_addr
>= memaddr
+ len
)
707 /* The breakpoint is entirely after the chunk of memory we are
711 /* Offset within shadow_contents. */
712 if (bp_addr
< memaddr
)
714 /* Only copy the second part of the breakpoint. */
715 bp_size
-= memaddr
- bp_addr
;
716 bptoffset
= memaddr
- bp_addr
;
720 if (bp_addr
+ bp_size
> memaddr
+ len
)
722 /* Only copy the first part of the breakpoint. */
723 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
726 memcpy (buf
+ bp_addr
- memaddr
,
727 b
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
732 /* A wrapper function for inserting catchpoints. */
734 insert_catchpoint (struct ui_out
*uo
, void *args
)
736 struct breakpoint
*b
= (struct breakpoint
*) args
;
739 gdb_assert (b
->type
== bp_catchpoint
);
740 gdb_assert (b
->ops
!= NULL
&& b
->ops
->insert
!= NULL
);
746 is_hardware_watchpoint (struct breakpoint
*bpt
)
748 return (bpt
->type
== bp_hardware_watchpoint
749 || bpt
->type
== bp_read_watchpoint
750 || bpt
->type
== bp_access_watchpoint
);
753 /* Find the current value of a watchpoint on EXP. Return the value in
754 *VALP and *RESULTP and the chain of intermediate and final values
755 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
758 If a memory error occurs while evaluating the expression, *RESULTP will
759 be set to NULL. *RESULTP may be a lazy value, if the result could
760 not be read from memory. It is used to determine whether a value
761 is user-specified (we should watch the whole value) or intermediate
762 (we should watch only the bit used to locate the final value).
764 If the final value, or any intermediate value, could not be read
765 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
766 set to any referenced values. *VALP will never be a lazy value.
767 This is the value which we store in struct breakpoint.
769 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
770 value chain. The caller must free the values individually. If
771 VAL_CHAIN is NULL, all generated values will be left on the value
775 fetch_watchpoint_value (struct expression
*exp
, struct value
**valp
,
776 struct value
**resultp
, struct value
**val_chain
)
778 struct value
*mark
, *new_mark
, *result
;
779 volatile struct gdb_exception ex
;
787 /* Evaluate the expression. */
788 mark
= value_mark ();
791 TRY_CATCH (ex
, RETURN_MASK_ALL
)
793 result
= evaluate_expression (exp
);
797 /* Ignore memory errors, we want watchpoints pointing at
798 inaccessible memory to still be created; otherwise, throw the
799 error to some higher catcher. */
805 throw_exception (ex
);
810 new_mark
= value_mark ();
811 if (mark
== new_mark
)
816 /* Make sure it's not lazy, so that after the target stops again we
817 have a non-lazy previous value to compare with. */
819 && (!value_lazy (result
) || gdb_value_fetch_lazy (result
)))
824 /* Return the chain of intermediate values. We use this to
825 decide which addresses to watch. */
826 *val_chain
= new_mark
;
827 value_release_to_mark (mark
);
831 /* Assuming that B is a watchpoint:
832 - Reparse watchpoint expression, if REPARSE is non-zero
833 - Evaluate expression and store the result in B->val
834 - Evaluate the condition if there is one, and store the result
836 - Update the list of values that must be watched in B->loc.
838 If the watchpoint disposition is disp_del_at_next_stop, then do nothing.
839 If this is local watchpoint that is out of scope, delete it. */
841 update_watchpoint (struct breakpoint
*b
, int reparse
)
843 int within_current_scope
;
844 struct frame_id saved_frame_id
;
845 struct bp_location
*loc
;
848 /* We don't free locations. They are stored in bp_location_chain and
849 update_global_locations will eventually delete them and remove
850 breakpoints if needed. */
853 if (b
->disposition
== disp_del_at_next_stop
)
856 /* Save the current frame's ID so we can restore it after
857 evaluating the watchpoint expression on its own frame. */
858 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
859 took a frame parameter, so that we didn't have to change the
861 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
863 /* Determine if the watchpoint is within scope. */
864 if (b
->exp_valid_block
== NULL
)
865 within_current_scope
= 1;
868 struct frame_info
*fi
;
869 fi
= frame_find_by_id (b
->watchpoint_frame
);
870 within_current_scope
= (fi
!= NULL
);
871 if (within_current_scope
)
875 if (within_current_scope
&& reparse
)
884 b
->exp
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
885 /* If the meaning of expression itself changed, the old value is
886 no longer relevant. We don't want to report a watchpoint hit
887 to the user when the old value and the new value may actually
888 be completely different objects. */
894 /* If we failed to parse the expression, for example because
895 it refers to a global variable in a not-yet-loaded shared library,
896 don't try to insert watchpoint. We don't automatically delete
897 such watchpoint, though, since failure to parse expression
898 is different from out-of-scope watchpoint. */
899 if (within_current_scope
&& b
->exp
)
901 struct value
*val_chain
, *v
, *result
, *next
;
903 fetch_watchpoint_value (b
->exp
, &v
, &result
, &val_chain
);
905 /* Avoid setting b->val if it's already set. The meaning of
906 b->val is 'the last value' user saw, and we should update
907 it only if we reported that last value to user. As it
908 happens, the code that reports it updates b->val directly. */
915 /* Change the type of breakpoint between hardware assisted or an
916 ordinary watchpoint depending on the hardware support and free
917 hardware slots. REPARSE is set when the inferior is started. */
918 if ((b
->type
== bp_watchpoint
|| b
->type
== bp_hardware_watchpoint
)
921 int i
, mem_cnt
, other_type_used
;
923 i
= hw_watchpoint_used_count (bp_hardware_watchpoint
,
925 mem_cnt
= can_use_hardware_watchpoint (val_chain
);
928 b
->type
= bp_watchpoint
;
931 int target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT
932 (bp_hardware_watchpoint
, i
+ mem_cnt
, other_type_used
);
933 if (target_resources_ok
<= 0)
934 b
->type
= bp_watchpoint
;
936 b
->type
= bp_hardware_watchpoint
;
940 /* Look at each value on the value chain. */
941 for (v
= val_chain
; v
; v
= next
)
943 /* If it's a memory location, and GDB actually needed
944 its contents to evaluate the expression, then we
945 must watch it. If the first value returned is
946 still lazy, that means an error occurred reading it;
947 watch it anyway in case it becomes readable. */
948 if (VALUE_LVAL (v
) == lval_memory
949 && (v
== val_chain
|| ! value_lazy (v
)))
951 struct type
*vtype
= check_typedef (value_type (v
));
953 /* We only watch structs and arrays if user asked
954 for it explicitly, never if they just happen to
955 appear in the middle of some value chain. */
957 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
958 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
962 struct bp_location
*loc
, **tmp
;
964 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
965 len
= TYPE_LENGTH (value_type (v
));
967 if (b
->type
== bp_read_watchpoint
)
969 else if (b
->type
== bp_access_watchpoint
)
972 loc
= allocate_bp_location (b
);
973 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
978 loc
->watchpoint_type
= type
;
982 next
= value_next (v
);
987 /* We just regenerated the list of breakpoint locations.
988 The new location does not have its condition field set to anything
989 and therefore, we must always reparse the cond_string, independently
990 of the value of the reparse flag. */
991 if (b
->cond_string
!= NULL
)
993 char *s
= b
->cond_string
;
994 b
->loc
->cond
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
997 else if (!within_current_scope
)
999 printf_filtered (_("\
1000 Watchpoint %d deleted because the program has left the block \n\
1001 in which its expression is valid.\n"),
1003 if (b
->related_breakpoint
)
1004 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1005 b
->disposition
= disp_del_at_next_stop
;
1008 /* Restore the selected frame. */
1009 select_frame (frame_find_by_id (saved_frame_id
));
1013 /* Returns 1 iff breakpoint location should be
1014 inserted in the inferior. */
1016 should_be_inserted (struct bp_location
*bpt
)
1018 if (!breakpoint_enabled (bpt
->owner
))
1021 if (bpt
->owner
->disposition
== disp_del_at_next_stop
)
1024 if (!bpt
->enabled
|| bpt
->shlib_disabled
|| bpt
->duplicate
)
1030 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1031 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1032 and HW_BREAKPOINT_ERROR are used to report problems.
1034 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1035 method for each breakpoint or catchpoint type. */
1037 insert_bp_location (struct bp_location
*bpt
,
1038 struct ui_file
*tmp_error_stream
,
1039 int *disabled_breaks
,
1040 int *hw_breakpoint_error
)
1044 if (!should_be_inserted (bpt
) || bpt
->inserted
)
1047 /* Initialize the target-specific information. */
1048 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
1049 bpt
->target_info
.placed_address
= bpt
->address
;
1051 if (bpt
->loc_type
== bp_loc_software_breakpoint
1052 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1054 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
1056 /* If the explicitly specified breakpoint type
1057 is not hardware breakpoint, check the memory map to see
1058 if the breakpoint address is in read only memory or not.
1059 Two important cases are:
1060 - location type is not hardware breakpoint, memory
1061 is readonly. We change the type of the location to
1062 hardware breakpoint.
1063 - location type is hardware breakpoint, memory is read-write.
1064 This means we've previously made the location hardware one, but
1065 then the memory map changed, so we undo.
1067 When breakpoints are removed, remove_breakpoints will
1068 use location types we've just set here, the only possible
1069 problem is that memory map has changed during running program,
1070 but it's not going to work anyway with current gdb. */
1071 struct mem_region
*mr
1072 = lookup_mem_region (bpt
->target_info
.placed_address
);
1076 if (automatic_hardware_breakpoints
)
1079 enum bp_loc_type new_type
;
1081 if (mr
->attrib
.mode
!= MEM_RW
)
1082 new_type
= bp_loc_hardware_breakpoint
;
1084 new_type
= bp_loc_software_breakpoint
;
1086 if (new_type
!= bpt
->loc_type
)
1088 static int said
= 0;
1089 bpt
->loc_type
= new_type
;
1092 fprintf_filtered (gdb_stdout
, _("\
1093 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1098 else if (bpt
->loc_type
== bp_loc_software_breakpoint
1099 && mr
->attrib
.mode
!= MEM_RW
)
1100 warning (_("cannot set software breakpoint at readonly address %s"),
1101 paddr (bpt
->address
));
1105 /* First check to see if we have to handle an overlay. */
1106 if (overlay_debugging
== ovly_off
1107 || bpt
->section
== NULL
1108 || !(section_is_overlay (bpt
->section
)))
1110 /* No overlay handling: just set the breakpoint. */
1112 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1113 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1115 val
= target_insert_breakpoint (&bpt
->target_info
);
1119 /* This breakpoint is in an overlay section.
1120 Shall we set a breakpoint at the LMA? */
1121 if (!overlay_events_enabled
)
1123 /* Yes -- overlay event support is not active,
1124 so we must try to set a breakpoint at the LMA.
1125 This will not work for a hardware breakpoint. */
1126 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1127 warning (_("hardware breakpoint %d not supported in overlay!"),
1128 bpt
->owner
->number
);
1131 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
1133 /* Set a software (trap) breakpoint at the LMA. */
1134 bpt
->overlay_target_info
= bpt
->target_info
;
1135 bpt
->overlay_target_info
.placed_address
= addr
;
1136 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
1138 fprintf_unfiltered (tmp_error_stream
,
1139 "Overlay breakpoint %d failed: in ROM?",
1140 bpt
->owner
->number
);
1143 /* Shall we set a breakpoint at the VMA? */
1144 if (section_is_mapped (bpt
->section
))
1146 /* Yes. This overlay section is mapped into memory. */
1147 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1148 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1150 val
= target_insert_breakpoint (&bpt
->target_info
);
1154 /* No. This breakpoint will not be inserted.
1155 No error, but do not mark the bp as 'inserted'. */
1162 /* Can't set the breakpoint. */
1163 if (solib_address (bpt
->address
))
1165 /* See also: disable_breakpoints_in_shlibs. */
1167 bpt
->shlib_disabled
= 1;
1168 if (!*disabled_breaks
)
1170 fprintf_unfiltered (tmp_error_stream
,
1171 "Cannot insert breakpoint %d.\n",
1172 bpt
->owner
->number
);
1173 fprintf_unfiltered (tmp_error_stream
,
1174 "Temporarily disabling shared library breakpoints:\n");
1176 *disabled_breaks
= 1;
1177 fprintf_unfiltered (tmp_error_stream
,
1178 "breakpoint #%d\n", bpt
->owner
->number
);
1182 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1184 *hw_breakpoint_error
= 1;
1185 fprintf_unfiltered (tmp_error_stream
,
1186 "Cannot insert hardware breakpoint %d.\n",
1187 bpt
->owner
->number
);
1191 fprintf_unfiltered (tmp_error_stream
,
1192 "Cannot insert breakpoint %d.\n",
1193 bpt
->owner
->number
);
1194 fprintf_filtered (tmp_error_stream
,
1195 "Error accessing memory address ");
1196 fputs_filtered (paddress (bpt
->address
), tmp_error_stream
);
1197 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1198 safe_strerror (val
));
1209 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
1210 /* NOTE drow/2003-09-08: This state only exists for removing
1211 watchpoints. It's not clear that it's necessary... */
1212 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
1214 val
= target_insert_watchpoint (bpt
->address
,
1216 bpt
->watchpoint_type
);
1217 bpt
->inserted
= (val
!= -1);
1220 else if (bpt
->owner
->type
== bp_catchpoint
)
1222 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1223 bpt
->owner
, RETURN_MASK_ERROR
);
1224 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1225 bpt
->owner
->number
);
1227 bpt
->owner
->enable_state
= bp_disabled
;
1231 /* We've already printed an error message if there was a problem
1232 inserting this catchpoint, and we've disabled the catchpoint,
1233 so just return success. */
1240 /* Make sure all breakpoints are inserted in inferior.
1241 Throws exception on any error.
1242 A breakpoint that is already inserted won't be inserted
1243 again, so calling this function twice is safe. */
1245 insert_breakpoints (void)
1247 struct breakpoint
*bpt
;
1249 ALL_BREAKPOINTS (bpt
)
1250 if (is_hardware_watchpoint (bpt
))
1251 update_watchpoint (bpt
, 0 /* don't reparse. */);
1253 update_global_location_list (1);
1255 if (!breakpoints_always_inserted_mode ()
1256 && (target_has_execution
1257 || (gdbarch_has_global_solist (target_gdbarch
)
1258 && target_supports_multi_process ())))
1259 /* update_global_location_list does not insert breakpoints
1260 when always_inserted_mode is not enabled. Explicitly
1262 insert_breakpoint_locations ();
1265 /* insert_breakpoints is used when starting or continuing the program.
1266 remove_breakpoints is used when the program stops.
1267 Both return zero if successful,
1268 or an `errno' value if could not write the inferior. */
1271 insert_breakpoint_locations (void)
1273 struct breakpoint
*bpt
;
1274 struct bp_location
*b
, *temp
;
1277 int disabled_breaks
= 0;
1278 int hw_breakpoint_error
= 0;
1280 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1281 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (tmp_error_stream
);
1283 /* Explicitly mark the warning -- this will only be printed if
1284 there was an error. */
1285 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1287 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1289 if (!should_be_inserted (b
) || b
->inserted
)
1292 /* There is no point inserting thread-specific breakpoints if the
1293 thread no longer exists. */
1294 if (b
->owner
->thread
!= -1
1295 && !valid_thread_id (b
->owner
->thread
))
1298 val
= insert_bp_location (b
, tmp_error_stream
,
1300 &hw_breakpoint_error
);
1305 /* If we failed to insert all locations of a watchpoint,
1306 remove them, as half-inserted watchpoint is of limited use. */
1307 ALL_BREAKPOINTS (bpt
)
1309 int some_failed
= 0;
1310 struct bp_location
*loc
;
1312 if (!is_hardware_watchpoint (bpt
))
1315 if (!breakpoint_enabled (bpt
))
1318 if (bpt
->disposition
== disp_del_at_next_stop
)
1321 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1329 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1331 remove_breakpoint (loc
, mark_uninserted
);
1333 hw_breakpoint_error
= 1;
1334 fprintf_unfiltered (tmp_error_stream
,
1335 "Could not insert hardware watchpoint %d.\n",
1343 /* If a hardware breakpoint or watchpoint was inserted, add a
1344 message about possibly exhausted resources. */
1345 if (hw_breakpoint_error
)
1347 fprintf_unfiltered (tmp_error_stream
,
1348 "Could not insert hardware breakpoints:\n\
1349 You may have requested too many hardware breakpoints/watchpoints.\n");
1351 target_terminal_ours_for_output ();
1352 error_stream (tmp_error_stream
);
1355 do_cleanups (cleanups
);
1359 remove_breakpoints (void)
1361 struct bp_location
*b
;
1364 ALL_BP_LOCATIONS (b
)
1368 val
= remove_breakpoint (b
, mark_uninserted
);
1377 remove_hw_watchpoints (void)
1379 struct bp_location
*b
;
1382 ALL_BP_LOCATIONS (b
)
1384 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1386 val
= remove_breakpoint (b
, mark_uninserted
);
1395 reattach_breakpoints (int pid
)
1397 struct bp_location
*b
;
1399 struct cleanup
*old_chain
= save_inferior_ptid ();
1400 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1401 int dummy1
= 0, dummy2
= 0;
1403 make_cleanup_ui_file_delete (tmp_error_stream
);
1405 inferior_ptid
= pid_to_ptid (pid
);
1406 ALL_BP_LOCATIONS (b
)
1411 val
= insert_bp_location (b
, tmp_error_stream
,
1415 do_cleanups (old_chain
);
1420 do_cleanups (old_chain
);
1425 update_breakpoints_after_exec (void)
1427 struct breakpoint
*b
;
1428 struct breakpoint
*temp
;
1429 struct bp_location
*bploc
;
1431 /* We're about to delete breakpoints from GDB's lists. If the
1432 INSERTED flag is true, GDB will try to lift the breakpoints by
1433 writing the breakpoints' "shadow contents" back into memory. The
1434 "shadow contents" are NOT valid after an exec, so GDB should not
1435 do that. Instead, the target is responsible from marking
1436 breakpoints out as soon as it detects an exec. We don't do that
1437 here instead, because there may be other attempts to delete
1438 breakpoints after detecting an exec and before reaching here. */
1439 ALL_BP_LOCATIONS (bploc
)
1440 gdb_assert (!bploc
->inserted
);
1442 ALL_BREAKPOINTS_SAFE (b
, temp
)
1444 /* Solib breakpoints must be explicitly reset after an exec(). */
1445 if (b
->type
== bp_shlib_event
)
1447 delete_breakpoint (b
);
1451 /* Thread event breakpoints must be set anew after an exec(),
1452 as must overlay event breakpoints. */
1453 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1455 delete_breakpoint (b
);
1459 /* Step-resume breakpoints are meaningless after an exec(). */
1460 if (b
->type
== bp_step_resume
)
1462 delete_breakpoint (b
);
1466 /* Longjmp and longjmp-resume breakpoints are also meaningless
1468 if (b
->type
== bp_longjmp
|| b
->type
== bp_longjmp_resume
)
1470 delete_breakpoint (b
);
1474 if (b
->type
== bp_catchpoint
)
1476 /* For now, none of the bp_catchpoint breakpoints need to
1477 do anything at this point. In the future, if some of
1478 the catchpoints need to something, we will need to add
1479 a new method, and call this method from here. */
1483 /* bp_finish is a special case. The only way we ought to be able
1484 to see one of these when an exec() has happened, is if the user
1485 caught a vfork, and then said "finish". Ordinarily a finish just
1486 carries them to the call-site of the current callee, by setting
1487 a temporary bp there and resuming. But in this case, the finish
1488 will carry them entirely through the vfork & exec.
1490 We don't want to allow a bp_finish to remain inserted now. But
1491 we can't safely delete it, 'cause finish_command has a handle to
1492 the bp on a bpstat, and will later want to delete it. There's a
1493 chance (and I've seen it happen) that if we delete the bp_finish
1494 here, that its storage will get reused by the time finish_command
1495 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1496 We really must allow finish_command to delete a bp_finish.
1498 In the absense of a general solution for the "how do we know
1499 it's safe to delete something others may have handles to?"
1500 problem, what we'll do here is just uninsert the bp_finish, and
1501 let finish_command delete it.
1503 (We know the bp_finish is "doomed" in the sense that it's
1504 momentary, and will be deleted as soon as finish_command sees
1505 the inferior stopped. So it doesn't matter that the bp's
1506 address is probably bogus in the new a.out, unlike e.g., the
1507 solib breakpoints.) */
1509 if (b
->type
== bp_finish
)
1514 /* Without a symbolic address, we have little hope of the
1515 pre-exec() address meaning the same thing in the post-exec()
1517 if (b
->addr_string
== NULL
)
1519 delete_breakpoint (b
);
1523 /* FIXME what about longjmp breakpoints? Re-create them here? */
1524 create_overlay_event_breakpoint ("_ovly_debug_event");
1528 detach_breakpoints (int pid
)
1530 struct bp_location
*b
;
1532 struct cleanup
*old_chain
= save_inferior_ptid ();
1534 if (pid
== PIDGET (inferior_ptid
))
1535 error (_("Cannot detach breakpoints of inferior_ptid"));
1537 /* Set inferior_ptid; remove_breakpoint uses this global. */
1538 inferior_ptid
= pid_to_ptid (pid
);
1539 ALL_BP_LOCATIONS (b
)
1543 val
= remove_breakpoint (b
, mark_inserted
);
1546 do_cleanups (old_chain
);
1551 do_cleanups (old_chain
);
1556 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1560 if (b
->owner
->enable_state
== bp_permanent
)
1561 /* Permanent breakpoints cannot be inserted or removed. */
1564 /* The type of none suggests that owner is actually deleted.
1565 This should not ever happen. */
1566 gdb_assert (b
->owner
->type
!= bp_none
);
1568 if (b
->loc_type
== bp_loc_software_breakpoint
1569 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1571 /* "Normal" instruction breakpoint: either the standard
1572 trap-instruction bp (bp_breakpoint), or a
1573 bp_hardware_breakpoint. */
1575 /* First check to see if we have to handle an overlay. */
1576 if (overlay_debugging
== ovly_off
1577 || b
->section
== NULL
1578 || !(section_is_overlay (b
->section
)))
1580 /* No overlay handling: just remove the breakpoint. */
1582 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1583 val
= target_remove_hw_breakpoint (&b
->target_info
);
1585 val
= target_remove_breakpoint (&b
->target_info
);
1589 /* This breakpoint is in an overlay section.
1590 Did we set a breakpoint at the LMA? */
1591 if (!overlay_events_enabled
)
1593 /* Yes -- overlay event support is not active, so we
1594 should have set a breakpoint at the LMA. Remove it.
1596 /* Ignore any failures: if the LMA is in ROM, we will
1597 have already warned when we failed to insert it. */
1598 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1599 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1601 target_remove_breakpoint (&b
->overlay_target_info
);
1603 /* Did we set a breakpoint at the VMA?
1604 If so, we will have marked the breakpoint 'inserted'. */
1607 /* Yes -- remove it. Previously we did not bother to
1608 remove the breakpoint if the section had been
1609 unmapped, but let's not rely on that being safe. We
1610 don't know what the overlay manager might do. */
1611 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1612 val
= target_remove_hw_breakpoint (&b
->target_info
);
1614 /* However, we should remove *software* breakpoints only
1615 if the section is still mapped, or else we overwrite
1616 wrong code with the saved shadow contents. */
1617 else if (section_is_mapped (b
->section
))
1618 val
= target_remove_breakpoint (&b
->target_info
);
1624 /* No -- not inserted, so no need to remove. No error. */
1629 /* In some cases, we might not be able to remove a breakpoint
1630 in a shared library that has already been removed, but we
1631 have not yet processed the shlib unload event. */
1632 if (val
&& solib_address (b
->address
))
1637 b
->inserted
= (is
== mark_inserted
);
1639 else if (b
->loc_type
== bp_loc_hardware_watchpoint
)
1644 b
->inserted
= (is
== mark_inserted
);
1645 val
= target_remove_watchpoint (b
->address
, b
->length
,
1646 b
->watchpoint_type
);
1648 /* Failure to remove any of the hardware watchpoints comes here. */
1649 if ((is
== mark_uninserted
) && (b
->inserted
))
1650 warning (_("Could not remove hardware watchpoint %d."),
1653 else if (b
->owner
->type
== bp_catchpoint
1654 && breakpoint_enabled (b
->owner
)
1657 gdb_assert (b
->owner
->ops
!= NULL
&& b
->owner
->ops
->remove
!= NULL
);
1659 val
= b
->owner
->ops
->remove (b
->owner
);
1662 b
->inserted
= (is
== mark_inserted
);
1668 /* Clear the "inserted" flag in all breakpoints. */
1671 mark_breakpoints_out (void)
1673 struct bp_location
*bpt
;
1675 ALL_BP_LOCATIONS (bpt
)
1679 /* Clear the "inserted" flag in all breakpoints and delete any
1680 breakpoints which should go away between runs of the program.
1682 Plus other such housekeeping that has to be done for breakpoints
1685 Note: this function gets called at the end of a run (by
1686 generic_mourn_inferior) and when a run begins (by
1687 init_wait_for_inferior). */
1692 breakpoint_init_inferior (enum inf_context context
)
1694 struct breakpoint
*b
, *temp
;
1695 struct bp_location
*bpt
;
1698 /* If breakpoint locations are shared across processes, then there's
1700 if (gdbarch_has_global_solist (target_gdbarch
))
1703 ALL_BP_LOCATIONS (bpt
)
1704 if (bpt
->owner
->enable_state
!= bp_permanent
)
1707 ALL_BREAKPOINTS_SAFE (b
, temp
)
1712 case bp_watchpoint_scope
:
1714 /* If the call dummy breakpoint is at the entry point it will
1715 cause problems when the inferior is rerun, so we better
1718 Also get rid of scope breakpoints. */
1719 delete_breakpoint (b
);
1723 case bp_hardware_watchpoint
:
1724 case bp_read_watchpoint
:
1725 case bp_access_watchpoint
:
1727 /* Likewise for watchpoints on local expressions. */
1728 if (b
->exp_valid_block
!= NULL
)
1729 delete_breakpoint (b
);
1730 else if (context
== inf_starting
)
1732 /* Reset val field to force reread of starting value
1733 in insert_breakpoints. */
1735 value_free (b
->val
);
1745 /* Get rid of the moribund locations. */
1746 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, bpt
); ++ix
)
1747 free_bp_location (bpt
);
1748 VEC_free (bp_location_p
, moribund_locations
);
1751 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1752 exists at PC. It returns ordinary_breakpoint_here if it's an
1753 ordinary breakpoint, or permanent_breakpoint_here if it's a
1754 permanent breakpoint.
1755 - When continuing from a location with an ordinary breakpoint, we
1756 actually single step once before calling insert_breakpoints.
1757 - When continuing from a localion with a permanent breakpoint, we
1758 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1759 the target, to advance the PC past the breakpoint. */
1761 enum breakpoint_here
1762 breakpoint_here_p (CORE_ADDR pc
)
1764 const struct bp_location
*bpt
;
1765 int any_breakpoint_here
= 0;
1767 ALL_BP_LOCATIONS (bpt
)
1769 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1770 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1773 if ((breakpoint_enabled (bpt
->owner
)
1774 || bpt
->owner
->enable_state
== bp_permanent
)
1775 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1777 if (overlay_debugging
1778 && section_is_overlay (bpt
->section
)
1779 && !section_is_mapped (bpt
->section
))
1780 continue; /* unmapped overlay -- can't be a match */
1781 else if (bpt
->owner
->enable_state
== bp_permanent
)
1782 return permanent_breakpoint_here
;
1784 any_breakpoint_here
= 1;
1788 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1791 /* Return true if there's a moribund breakpoint at PC. */
1794 moribund_breakpoint_here_p (CORE_ADDR pc
)
1796 struct bp_location
*loc
;
1799 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
1800 if (loc
->address
== pc
)
1806 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1807 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1808 This does not check for single-step breakpoints, which are
1809 inserted and removed using direct target manipulation. */
1812 regular_breakpoint_inserted_here_p (CORE_ADDR pc
)
1814 const struct bp_location
*bpt
;
1816 ALL_BP_LOCATIONS (bpt
)
1818 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1819 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1823 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1825 if (overlay_debugging
1826 && section_is_overlay (bpt
->section
)
1827 && !section_is_mapped (bpt
->section
))
1828 continue; /* unmapped overlay -- can't be a match */
1836 /* Returns non-zero iff there's either regular breakpoint
1837 or a single step breakpoint inserted at PC. */
1840 breakpoint_inserted_here_p (CORE_ADDR pc
)
1842 if (regular_breakpoint_inserted_here_p (pc
))
1845 if (single_step_breakpoint_inserted_here_p (pc
))
1851 /* This function returns non-zero iff there is a software breakpoint
1855 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1857 const struct bp_location
*bpt
;
1858 int any_breakpoint_here
= 0;
1860 ALL_BP_LOCATIONS (bpt
)
1862 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1866 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1868 if (overlay_debugging
1869 && section_is_overlay (bpt
->section
)
1870 && !section_is_mapped (bpt
->section
))
1871 continue; /* unmapped overlay -- can't be a match */
1877 /* Also check for software single-step breakpoints. */
1878 if (single_step_breakpoint_inserted_here_p (pc
))
1884 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1885 PC is valid for process/thread PTID. */
1888 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1890 const struct bp_location
*bpt
;
1893 thread
= pid_to_thread_id (ptid
);
1895 ALL_BP_LOCATIONS (bpt
)
1897 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1898 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1901 if ((breakpoint_enabled (bpt
->owner
)
1902 || bpt
->owner
->enable_state
== bp_permanent
)
1903 && bpt
->address
== pc
1904 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1906 if (overlay_debugging
1907 && section_is_overlay (bpt
->section
)
1908 && !section_is_mapped (bpt
->section
))
1909 continue; /* unmapped overlay -- can't be a match */
1919 /* bpstat stuff. External routines' interfaces are documented
1923 ep_is_catchpoint (struct breakpoint
*ep
)
1925 return (ep
->type
== bp_catchpoint
);
1929 bpstat_free (bpstat bs
)
1931 if (bs
->old_val
!= NULL
)
1932 value_free (bs
->old_val
);
1933 free_command_lines (&bs
->commands
);
1937 /* Clear a bpstat so that it says we are not at any breakpoint.
1938 Also free any storage that is part of a bpstat. */
1941 bpstat_clear (bpstat
*bsp
)
1958 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1959 is part of the bpstat is copied as well. */
1962 bpstat_copy (bpstat bs
)
1966 bpstat retval
= NULL
;
1971 for (; bs
!= NULL
; bs
= bs
->next
)
1973 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1974 memcpy (tmp
, bs
, sizeof (*tmp
));
1975 if (bs
->commands
!= NULL
)
1976 tmp
->commands
= copy_command_lines (bs
->commands
);
1977 if (bs
->old_val
!= NULL
)
1979 tmp
->old_val
= value_copy (bs
->old_val
);
1980 release_value (tmp
->old_val
);
1984 /* This is the first thing in the chain. */
1994 /* Find the bpstat associated with this breakpoint */
1997 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
2002 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2004 if (bsp
->breakpoint_at
&& bsp
->breakpoint_at
->owner
== breakpoint
)
2010 /* Find a step_resume breakpoint associated with this bpstat.
2011 (If there are multiple step_resume bp's on the list, this function
2012 will arbitrarily pick one.)
2014 It is an error to use this function if BPSTAT doesn't contain a
2015 step_resume breakpoint.
2017 See wait_for_inferior's use of this function. */
2019 bpstat_find_step_resume_breakpoint (bpstat bsp
)
2023 gdb_assert (bsp
!= NULL
);
2025 current_thread
= pid_to_thread_id (inferior_ptid
);
2027 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2029 if ((bsp
->breakpoint_at
!= NULL
) &&
2030 (bsp
->breakpoint_at
->owner
->type
== bp_step_resume
) &&
2031 (bsp
->breakpoint_at
->owner
->thread
== current_thread
||
2032 bsp
->breakpoint_at
->owner
->thread
== -1))
2033 return bsp
->breakpoint_at
->owner
;
2036 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2040 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2041 at. *BSP upon return is a bpstat which points to the remaining
2042 breakpoints stopped at (but which is not guaranteed to be good for
2043 anything but further calls to bpstat_num).
2044 Return 0 if passed a bpstat which does not indicate any breakpoints.
2045 Return -1 if stopped at a breakpoint that has been deleted since
2047 Return 1 otherwise. */
2050 bpstat_num (bpstat
*bsp
, int *num
)
2052 struct breakpoint
*b
;
2055 return 0; /* No more breakpoint values */
2057 /* We assume we'll never have several bpstats that
2058 correspond to a single breakpoint -- otherwise,
2059 this function might return the same number more
2060 than once and this will look ugly. */
2061 b
= (*bsp
)->breakpoint_at
? (*bsp
)->breakpoint_at
->owner
: NULL
;
2062 *bsp
= (*bsp
)->next
;
2064 return -1; /* breakpoint that's been deleted since */
2066 *num
= b
->number
; /* We have its number */
2070 /* Modify BS so that the actions will not be performed. */
2073 bpstat_clear_actions (bpstat bs
)
2075 for (; bs
!= NULL
; bs
= bs
->next
)
2077 free_command_lines (&bs
->commands
);
2078 if (bs
->old_val
!= NULL
)
2080 value_free (bs
->old_val
);
2086 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2088 cleanup_executing_breakpoints (void *ignore
)
2090 executing_breakpoint_commands
= 0;
2093 /* Execute all the commands associated with all the breakpoints at this
2094 location. Any of these commands could cause the process to proceed
2095 beyond this point, etc. We look out for such changes by checking
2096 the global "breakpoint_proceeded" after each command.
2098 Returns true if a breakpoint command resumed the inferior. In that
2099 case, it is the caller's responsibility to recall it again with the
2100 bpstat of the current thread. */
2103 bpstat_do_actions_1 (bpstat
*bsp
)
2106 struct cleanup
*old_chain
;
2109 /* Avoid endless recursion if a `source' command is contained
2111 if (executing_breakpoint_commands
)
2114 executing_breakpoint_commands
= 1;
2115 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2117 /* This pointer will iterate over the list of bpstat's. */
2120 breakpoint_proceeded
= 0;
2121 for (; bs
!= NULL
; bs
= bs
->next
)
2123 struct command_line
*cmd
;
2124 struct cleanup
*this_cmd_tree_chain
;
2126 /* Take ownership of the BSP's command tree, if it has one.
2128 The command tree could legitimately contain commands like
2129 'step' and 'next', which call clear_proceed_status, which
2130 frees stop_bpstat's command tree. To make sure this doesn't
2131 free the tree we're executing out from under us, we need to
2132 take ownership of the tree ourselves. Since a given bpstat's
2133 commands are only executed once, we don't need to copy it; we
2134 can clear the pointer in the bpstat, and make sure we free
2135 the tree when we're done. */
2138 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2142 execute_control_command (cmd
);
2144 if (breakpoint_proceeded
)
2150 /* We can free this command tree now. */
2151 do_cleanups (this_cmd_tree_chain
);
2153 if (breakpoint_proceeded
)
2155 if (target_can_async_p ())
2156 /* If we are in async mode, then the target might be still
2157 running, not stopped at any breakpoint, so nothing for
2158 us to do here -- just return to the event loop. */
2161 /* In sync mode, when execute_control_command returns
2162 we're already standing on the next breakpoint.
2163 Breakpoint commands for that stop were not run, since
2164 execute_command does not run breakpoint commands --
2165 only command_line_handler does, but that one is not
2166 involved in execution of breakpoint commands. So, we
2167 can now execute breakpoint commands. It should be
2168 noted that making execute_command do bpstat actions is
2169 not an option -- in this case we'll have recursive
2170 invocation of bpstat for each breakpoint with a
2171 command, and can easily blow up GDB stack. Instead, we
2172 return true, which will trigger the caller to recall us
2173 with the new stop_bpstat. */
2178 do_cleanups (old_chain
);
2183 bpstat_do_actions (void)
2185 /* Do any commands attached to breakpoint we are stopped at. */
2186 while (!ptid_equal (inferior_ptid
, null_ptid
)
2187 && target_has_execution
2188 && !is_exited (inferior_ptid
)
2189 && !is_executing (inferior_ptid
))
2190 /* Since in sync mode, bpstat_do_actions may resume the inferior,
2191 and only return when it is stopped at the next breakpoint, we
2192 keep doing breakpoint actions until it returns false to
2193 indicate the inferior was not resumed. */
2194 if (!bpstat_do_actions_1 (&inferior_thread ()->stop_bpstat
))
2198 /* Print out the (old or new) value associated with a watchpoint. */
2201 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2204 fprintf_unfiltered (stream
, _("<unreadable>"));
2207 struct value_print_options opts
;
2208 get_user_print_options (&opts
);
2209 value_print (val
, stream
, &opts
);
2213 /* This is the normal print function for a bpstat. In the future,
2214 much of this logic could (should?) be moved to bpstat_stop_status,
2215 by having it set different print_it values.
2217 Current scheme: When we stop, bpstat_print() is called. It loops
2218 through the bpstat list of things causing this stop, calling the
2219 print_bp_stop_message function on each one. The behavior of the
2220 print_bp_stop_message function depends on the print_it field of
2221 bpstat. If such field so indicates, call this function here.
2223 Return values from this routine (ultimately used by bpstat_print()
2224 and normal_stop() to decide what to do):
2225 PRINT_NOTHING: Means we already printed all we needed to print,
2226 don't print anything else.
2227 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2228 that something to be followed by a location.
2229 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2230 that something to be followed by a location.
2231 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2234 static enum print_stop_action
2235 print_it_typical (bpstat bs
)
2237 struct cleanup
*old_chain
;
2238 struct breakpoint
*b
;
2239 const struct bp_location
*bl
;
2240 struct ui_stream
*stb
;
2242 enum print_stop_action result
;
2244 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2245 which has since been deleted. */
2246 if (bs
->breakpoint_at
== NULL
)
2247 return PRINT_UNKNOWN
;
2248 bl
= bs
->breakpoint_at
;
2251 stb
= ui_out_stream_new (uiout
);
2252 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2257 case bp_hardware_breakpoint
:
2258 bp_temp
= bs
->breakpoint_at
->owner
->disposition
== disp_del
;
2259 if (bl
->address
!= bl
->requested_address
)
2260 breakpoint_adjustment_warning (bl
->requested_address
,
2263 annotate_breakpoint (b
->number
);
2265 ui_out_text (uiout
, "\nTemporary breakpoint ");
2267 ui_out_text (uiout
, "\nBreakpoint ");
2268 if (ui_out_is_mi_like_p (uiout
))
2270 ui_out_field_string (uiout
, "reason",
2271 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2272 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
2274 ui_out_field_int (uiout
, "bkptno", b
->number
);
2275 ui_out_text (uiout
, ", ");
2276 result
= PRINT_SRC_AND_LOC
;
2279 case bp_shlib_event
:
2280 /* Did we stop because the user set the stop_on_solib_events
2281 variable? (If so, we report this as a generic, "Stopped due
2282 to shlib event" message.) */
2283 printf_filtered (_("Stopped due to shared library event\n"));
2284 result
= PRINT_NOTHING
;
2287 case bp_thread_event
:
2288 /* Not sure how we will get here.
2289 GDB should not stop for these breakpoints. */
2290 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2291 result
= PRINT_NOTHING
;
2294 case bp_overlay_event
:
2295 /* By analogy with the thread event, GDB should not stop for these. */
2296 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2297 result
= PRINT_NOTHING
;
2301 case bp_hardware_watchpoint
:
2302 annotate_watchpoint (b
->number
);
2303 if (ui_out_is_mi_like_p (uiout
))
2306 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2308 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2309 ui_out_text (uiout
, "\nOld value = ");
2310 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2311 ui_out_field_stream (uiout
, "old", stb
);
2312 ui_out_text (uiout
, "\nNew value = ");
2313 watchpoint_value_print (b
->val
, stb
->stream
);
2314 ui_out_field_stream (uiout
, "new", stb
);
2315 ui_out_text (uiout
, "\n");
2316 /* More than one watchpoint may have been triggered. */
2317 result
= PRINT_UNKNOWN
;
2320 case bp_read_watchpoint
:
2321 if (ui_out_is_mi_like_p (uiout
))
2324 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2326 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2327 ui_out_text (uiout
, "\nValue = ");
2328 watchpoint_value_print (b
->val
, stb
->stream
);
2329 ui_out_field_stream (uiout
, "value", stb
);
2330 ui_out_text (uiout
, "\n");
2331 result
= PRINT_UNKNOWN
;
2334 case bp_access_watchpoint
:
2335 if (bs
->old_val
!= NULL
)
2337 annotate_watchpoint (b
->number
);
2338 if (ui_out_is_mi_like_p (uiout
))
2341 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2343 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2344 ui_out_text (uiout
, "\nOld value = ");
2345 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2346 ui_out_field_stream (uiout
, "old", stb
);
2347 ui_out_text (uiout
, "\nNew value = ");
2352 if (ui_out_is_mi_like_p (uiout
))
2355 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2356 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2357 ui_out_text (uiout
, "\nValue = ");
2359 watchpoint_value_print (b
->val
, stb
->stream
);
2360 ui_out_field_stream (uiout
, "new", stb
);
2361 ui_out_text (uiout
, "\n");
2362 result
= PRINT_UNKNOWN
;
2365 /* Fall through, we don't deal with these types of breakpoints
2369 if (ui_out_is_mi_like_p (uiout
))
2372 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2373 result
= PRINT_UNKNOWN
;
2377 if (ui_out_is_mi_like_p (uiout
))
2380 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2381 result
= PRINT_UNKNOWN
;
2386 case bp_longjmp_resume
:
2387 case bp_step_resume
:
2388 case bp_watchpoint_scope
:
2391 result
= PRINT_UNKNOWN
;
2395 do_cleanups (old_chain
);
2399 /* Generic routine for printing messages indicating why we
2400 stopped. The behavior of this function depends on the value
2401 'print_it' in the bpstat structure. Under some circumstances we
2402 may decide not to print anything here and delegate the task to
2405 static enum print_stop_action
2406 print_bp_stop_message (bpstat bs
)
2408 switch (bs
->print_it
)
2411 /* Nothing should be printed for this bpstat entry. */
2412 return PRINT_UNKNOWN
;
2416 /* We still want to print the frame, but we already printed the
2417 relevant messages. */
2418 return PRINT_SRC_AND_LOC
;
2421 case print_it_normal
:
2423 const struct bp_location
*bl
= bs
->breakpoint_at
;
2424 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2426 /* Normal case. Call the breakpoint's print_it method, or
2427 print_it_typical. */
2428 /* FIXME: how breakpoint can ever be NULL here? */
2429 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2430 return b
->ops
->print_it (b
);
2432 return print_it_typical (bs
);
2437 internal_error (__FILE__
, __LINE__
,
2438 _("print_bp_stop_message: unrecognized enum value"));
2443 /* Print a message indicating what happened. This is called from
2444 normal_stop(). The input to this routine is the head of the bpstat
2445 list - a list of the eventpoints that caused this stop. This
2446 routine calls the generic print routine for printing a message
2447 about reasons for stopping. This will print (for example) the
2448 "Breakpoint n," part of the output. The return value of this
2451 PRINT_UNKNOWN: Means we printed nothing
2452 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2453 code to print the location. An example is
2454 "Breakpoint 1, " which should be followed by
2456 PRINT_SRC_ONLY: Means we printed something, but there is no need
2457 to also print the location part of the message.
2458 An example is the catch/throw messages, which
2459 don't require a location appended to the end.
2460 PRINT_NOTHING: We have done some printing and we don't need any
2461 further info to be printed.*/
2463 enum print_stop_action
2464 bpstat_print (bpstat bs
)
2468 /* Maybe another breakpoint in the chain caused us to stop.
2469 (Currently all watchpoints go on the bpstat whether hit or not.
2470 That probably could (should) be changed, provided care is taken
2471 with respect to bpstat_explains_signal). */
2472 for (; bs
; bs
= bs
->next
)
2474 val
= print_bp_stop_message (bs
);
2475 if (val
== PRINT_SRC_ONLY
2476 || val
== PRINT_SRC_AND_LOC
2477 || val
== PRINT_NOTHING
)
2481 /* We reached the end of the chain, or we got a null BS to start
2482 with and nothing was printed. */
2483 return PRINT_UNKNOWN
;
2486 /* Evaluate the expression EXP and return 1 if value is zero.
2487 This is used inside a catch_errors to evaluate the breakpoint condition.
2488 The argument is a "struct expression *" that has been cast to char * to
2489 make it pass through catch_errors. */
2492 breakpoint_cond_eval (void *exp
)
2494 struct value
*mark
= value_mark ();
2495 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2496 value_free_to_mark (mark
);
2500 /* Allocate a new bpstat and chain it to the current one. */
2503 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2507 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2509 bs
->breakpoint_at
= bl
;
2510 /* If the condition is false, etc., don't do the commands. */
2511 bs
->commands
= NULL
;
2513 bs
->print_it
= print_it_normal
;
2517 /* The target has stopped with waitstatus WS. Check if any hardware
2518 watchpoints have triggered, according to the target. */
2521 watchpoints_triggered (struct target_waitstatus
*ws
)
2523 int stopped_by_watchpoint
= STOPPED_BY_WATCHPOINT (*ws
);
2525 struct breakpoint
*b
;
2527 if (!stopped_by_watchpoint
)
2529 /* We were not stopped by a watchpoint. Mark all watchpoints
2530 as not triggered. */
2532 if (b
->type
== bp_hardware_watchpoint
2533 || b
->type
== bp_read_watchpoint
2534 || b
->type
== bp_access_watchpoint
)
2535 b
->watchpoint_triggered
= watch_triggered_no
;
2540 if (!target_stopped_data_address (¤t_target
, &addr
))
2542 /* We were stopped by a watchpoint, but we don't know where.
2543 Mark all watchpoints as unknown. */
2545 if (b
->type
== bp_hardware_watchpoint
2546 || b
->type
== bp_read_watchpoint
2547 || b
->type
== bp_access_watchpoint
)
2548 b
->watchpoint_triggered
= watch_triggered_unknown
;
2550 return stopped_by_watchpoint
;
2553 /* The target could report the data address. Mark watchpoints
2554 affected by this data address as triggered, and all others as not
2558 if (b
->type
== bp_hardware_watchpoint
2559 || b
->type
== bp_read_watchpoint
2560 || b
->type
== bp_access_watchpoint
)
2562 struct bp_location
*loc
;
2565 b
->watchpoint_triggered
= watch_triggered_no
;
2566 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2567 /* Exact match not required. Within range is
2569 if (target_watchpoint_addr_within_range (¤t_target
,
2573 b
->watchpoint_triggered
= watch_triggered_yes
;
2581 /* Possible return values for watchpoint_check (this can't be an enum
2582 because of check_errors). */
2583 /* The watchpoint has been deleted. */
2584 #define WP_DELETED 1
2585 /* The value has changed. */
2586 #define WP_VALUE_CHANGED 2
2587 /* The value has not changed. */
2588 #define WP_VALUE_NOT_CHANGED 3
2590 #define BP_TEMPFLAG 1
2591 #define BP_HARDWAREFLAG 2
2593 /* Check watchpoint condition. */
2596 watchpoint_check (void *p
)
2598 bpstat bs
= (bpstat
) p
;
2599 struct breakpoint
*b
;
2600 struct frame_info
*fr
;
2601 int within_current_scope
;
2603 b
= bs
->breakpoint_at
->owner
;
2605 if (b
->exp_valid_block
== NULL
)
2606 within_current_scope
= 1;
2609 /* There is no current frame at this moment. If we're going to have
2610 any chance of handling watchpoints on local variables, we'll need
2611 the frame chain (so we can determine if we're in scope). */
2612 reinit_frame_cache ();
2613 fr
= frame_find_by_id (b
->watchpoint_frame
);
2614 within_current_scope
= (fr
!= NULL
);
2616 /* If we've gotten confused in the unwinder, we might have
2617 returned a frame that can't describe this variable. */
2618 if (within_current_scope
2619 && (block_linkage_function (b
->exp_valid_block
)
2620 != get_frame_function (fr
)))
2621 within_current_scope
= 0;
2623 /* in_function_epilogue_p() returns a non-zero value if we're still
2624 in the function but the stack frame has already been invalidated.
2625 Since we can't rely on the values of local variables after the
2626 stack has been destroyed, we are treating the watchpoint in that
2627 state as `not changed' without further checking.
2629 vinschen/2003-09-04: The former implementation left out the case
2630 that the watchpoint frame couldn't be found by frame_find_by_id()
2631 because the current PC is currently in an epilogue. Calling
2632 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2633 if ((!within_current_scope
|| fr
== get_current_frame ())
2634 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2635 return WP_VALUE_NOT_CHANGED
;
2636 if (fr
&& within_current_scope
)
2637 /* If we end up stopping, the current frame will get selected
2638 in normal_stop. So this call to select_frame won't affect
2643 if (within_current_scope
)
2645 /* We use value_{,free_to_}mark because it could be a
2646 *long* time before we return to the command level and
2647 call free_all_values. We can't call free_all_values because
2648 we might be in the middle of evaluating a function call. */
2650 struct value
*mark
= value_mark ();
2651 struct value
*new_val
;
2653 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2654 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2655 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2657 if (new_val
!= NULL
)
2659 release_value (new_val
);
2660 value_free_to_mark (mark
);
2662 bs
->old_val
= b
->val
;
2665 /* We will stop here */
2666 return WP_VALUE_CHANGED
;
2670 /* Nothing changed, don't do anything. */
2671 value_free_to_mark (mark
);
2672 /* We won't stop here */
2673 return WP_VALUE_NOT_CHANGED
;
2678 /* This seems like the only logical thing to do because
2679 if we temporarily ignored the watchpoint, then when
2680 we reenter the block in which it is valid it contains
2681 garbage (in the case of a function, it may have two
2682 garbage values, one before and one after the prologue).
2683 So we can't even detect the first assignment to it and
2684 watch after that (since the garbage may or may not equal
2685 the first value assigned). */
2686 /* We print all the stop information in print_it_typical(), but
2687 in this case, by the time we call print_it_typical() this bp
2688 will be deleted already. So we have no choice but print the
2689 information here. */
2690 if (ui_out_is_mi_like_p (uiout
))
2692 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2693 ui_out_text (uiout
, "\nWatchpoint ");
2694 ui_out_field_int (uiout
, "wpnum", b
->number
);
2695 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2696 which its expression is valid.\n");
2698 if (b
->related_breakpoint
)
2699 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2700 b
->disposition
= disp_del_at_next_stop
;
2706 /* Return true if it looks like target has stopped due to hitting
2707 breakpoint location BL. This function does not check if we
2708 should stop, only if BL explains the stop. */
2710 bpstat_check_location (const struct bp_location
*bl
, CORE_ADDR bp_addr
)
2712 struct breakpoint
*b
= bl
->owner
;
2714 if (b
->type
!= bp_watchpoint
2715 && b
->type
!= bp_hardware_watchpoint
2716 && b
->type
!= bp_read_watchpoint
2717 && b
->type
!= bp_access_watchpoint
2718 && b
->type
!= bp_hardware_breakpoint
2719 && b
->type
!= bp_catchpoint
) /* a non-watchpoint bp */
2721 if (bl
->address
!= bp_addr
) /* address doesn't match */
2723 if (overlay_debugging
/* unmapped overlay section */
2724 && section_is_overlay (bl
->section
)
2725 && !section_is_mapped (bl
->section
))
2729 /* Continuable hardware watchpoints are treated as non-existent if the
2730 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2731 some data address). Otherwise gdb won't stop on a break instruction
2732 in the code (not from a breakpoint) when a hardware watchpoint has
2733 been defined. Also skip watchpoints which we know did not trigger
2734 (did not match the data address). */
2736 if ((b
->type
== bp_hardware_watchpoint
2737 || b
->type
== bp_read_watchpoint
2738 || b
->type
== bp_access_watchpoint
)
2739 && b
->watchpoint_triggered
== watch_triggered_no
)
2742 if (b
->type
== bp_hardware_breakpoint
)
2744 if (bl
->address
!= bp_addr
)
2746 if (overlay_debugging
/* unmapped overlay section */
2747 && section_is_overlay (bl
->section
)
2748 && !section_is_mapped (bl
->section
))
2752 if (b
->type
== bp_catchpoint
)
2754 gdb_assert (b
->ops
!= NULL
&& b
->ops
->breakpoint_hit
!= NULL
);
2755 if (!b
->ops
->breakpoint_hit (b
))
2762 /* If BS refers to a watchpoint, determine if the watched values
2763 has actually changed, and we should stop. If not, set BS->stop
2766 bpstat_check_watchpoint (bpstat bs
)
2768 const struct bp_location
*bl
= bs
->breakpoint_at
;
2769 struct breakpoint
*b
= bl
->owner
;
2771 if (b
->type
== bp_watchpoint
2772 || b
->type
== bp_read_watchpoint
2773 || b
->type
== bp_access_watchpoint
2774 || b
->type
== bp_hardware_watchpoint
)
2778 int must_check_value
= 0;
2780 if (b
->type
== bp_watchpoint
)
2781 /* For a software watchpoint, we must always check the
2783 must_check_value
= 1;
2784 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2785 /* We have a hardware watchpoint (read, write, or access)
2786 and the target earlier reported an address watched by
2788 must_check_value
= 1;
2789 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2790 && b
->type
== bp_hardware_watchpoint
)
2791 /* We were stopped by a hardware watchpoint, but the target could
2792 not report the data address. We must check the watchpoint's
2793 value. Access and read watchpoints are out of luck; without
2794 a data address, we can't figure it out. */
2795 must_check_value
= 1;
2797 if (must_check_value
)
2799 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2801 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2802 int e
= catch_errors (watchpoint_check
, bs
, message
,
2804 do_cleanups (cleanups
);
2808 /* We've already printed what needs to be printed. */
2809 bs
->print_it
= print_it_done
;
2812 case WP_VALUE_CHANGED
:
2813 if (b
->type
== bp_read_watchpoint
)
2815 /* Don't stop: read watchpoints shouldn't fire if
2816 the value has changed. This is for targets
2817 which cannot set read-only watchpoints. */
2818 bs
->print_it
= print_it_noop
;
2822 case WP_VALUE_NOT_CHANGED
:
2823 if (b
->type
== bp_hardware_watchpoint
2824 || b
->type
== bp_watchpoint
)
2826 /* Don't stop: write watchpoints shouldn't fire if
2827 the value hasn't changed. */
2828 bs
->print_it
= print_it_noop
;
2836 /* Error from catch_errors. */
2837 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2838 if (b
->related_breakpoint
)
2839 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2840 b
->disposition
= disp_del_at_next_stop
;
2841 /* We've already printed what needs to be printed. */
2842 bs
->print_it
= print_it_done
;
2846 else /* must_check_value == 0 */
2848 /* This is a case where some watchpoint(s) triggered, but
2849 not at the address of this watchpoint, or else no
2850 watchpoint triggered after all. So don't print
2851 anything for this watchpoint. */
2852 bs
->print_it
= print_it_noop
;
2859 /* Check conditions (condition proper, frame, thread and ignore count)
2860 of breakpoint referred to by BS. If we should not stop for this
2861 breakpoint, set BS->stop to 0. */
2863 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
2865 int thread_id
= pid_to_thread_id (ptid
);
2866 const struct bp_location
*bl
= bs
->breakpoint_at
;
2867 struct breakpoint
*b
= bl
->owner
;
2869 if (frame_id_p (b
->frame_id
)
2870 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2874 int value_is_zero
= 0;
2876 /* If this is a scope breakpoint, mark the associated
2877 watchpoint as triggered so that we will handle the
2878 out-of-scope event. We'll get to the watchpoint next
2880 if (b
->type
== bp_watchpoint_scope
)
2881 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
2883 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
2885 /* Need to select the frame, with all that implies
2886 so that the conditions will have the right context. */
2887 select_frame (get_current_frame ());
2889 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
2890 "Error in testing breakpoint condition:\n",
2892 /* FIXME-someday, should give breakpoint # */
2895 if (bl
->cond
&& value_is_zero
)
2899 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2903 else if (b
->ignore_count
> 0)
2906 annotate_ignore_count_change ();
2908 /* Increase the hit count even though we don't
2916 /* Get a bpstat associated with having just stopped at address
2917 BP_ADDR in thread PTID.
2919 Determine whether we stopped at a breakpoint, etc, or whether we
2920 don't understand this stop. Result is a chain of bpstat's such that:
2922 if we don't understand the stop, the result is a null pointer.
2924 if we understand why we stopped, the result is not null.
2926 Each element of the chain refers to a particular breakpoint or
2927 watchpoint at which we have stopped. (We may have stopped for
2928 several reasons concurrently.)
2930 Each element of the chain has valid next, breakpoint_at,
2931 commands, FIXME??? fields. */
2934 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
2936 struct breakpoint
*b
= NULL
;
2937 const struct bp_location
*bl
;
2938 struct bp_location
*loc
;
2939 /* Root of the chain of bpstat's */
2940 struct bpstats root_bs
[1];
2941 /* Pointer to the last thing in the chain currently. */
2942 bpstat bs
= root_bs
;
2944 int need_remove_insert
;
2946 ALL_BP_LOCATIONS (bl
)
2950 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2953 /* For hardware watchpoints, we look only at the first location.
2954 The watchpoint_check function will work on entire expression,
2955 not the individual locations. For read watchopints, the
2956 watchpoints_triggered function have checked all locations
2959 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
2962 if (!bpstat_check_location (bl
, bp_addr
))
2965 /* Come here if it's a watchpoint, or if the break address matches */
2967 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
2969 /* Assume we stop. Should we find watchpoint that is not actually
2970 triggered, or if condition of breakpoint is false, we'll reset
2975 bpstat_check_watchpoint (bs
);
2979 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
2980 /* We do not stop for these. */
2983 bpstat_check_breakpoint_conditions (bs
, ptid
);
2989 /* We will stop here */
2990 if (b
->disposition
== disp_disable
)
2992 if (b
->enable_state
!= bp_permanent
)
2993 b
->enable_state
= bp_disabled
;
2994 update_global_location_list (0);
2998 bs
->commands
= b
->commands
;
3000 (strcmp ("silent", bs
->commands
->line
) == 0
3001 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3003 bs
->commands
= bs
->commands
->next
;
3006 bs
->commands
= copy_command_lines (bs
->commands
);
3009 /* Print nothing for this entry if we dont stop or if we dont print. */
3010 if (bs
->stop
== 0 || bs
->print
== 0)
3011 bs
->print_it
= print_it_noop
;
3014 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
3016 if (loc
->address
== bp_addr
)
3018 bs
= bpstat_alloc (loc
, bs
);
3019 /* For hits of moribund locations, we should just proceed. */
3022 bs
->print_it
= print_it_noop
;
3026 bs
->next
= NULL
; /* Terminate the chain */
3027 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3029 /* If we aren't stopping, the value of some hardware watchpoint may
3030 not have changed, but the intermediate memory locations we are
3031 watching may have. Don't bother if we're stopping; this will get
3033 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3037 need_remove_insert
= 0;
3039 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3041 && bs
->breakpoint_at
->owner
3042 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3043 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3044 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3046 /* remove/insert can invalidate bs->breakpoint_at, if this
3047 location is no longer used by the watchpoint. Prevent
3048 further code from trying to use it. */
3049 bs
->breakpoint_at
= NULL
;
3050 need_remove_insert
= 1;
3053 if (need_remove_insert
)
3055 remove_breakpoints ();
3056 insert_breakpoints ();
3059 return root_bs
->next
;
3062 /* Tell what to do about this bpstat. */
3064 bpstat_what (bpstat bs
)
3066 /* Classify each bpstat as one of the following. */
3069 /* This bpstat element has no effect on the main_action. */
3072 /* There was a watchpoint, stop but don't print. */
3075 /* There was a watchpoint, stop and print. */
3078 /* There was a breakpoint but we're not stopping. */
3081 /* There was a breakpoint, stop but don't print. */
3084 /* There was a breakpoint, stop and print. */
3087 /* We hit the longjmp breakpoint. */
3090 /* We hit the longjmp_resume breakpoint. */
3093 /* We hit the step_resume breakpoint. */
3096 /* We hit the shared library event breakpoint. */
3099 /* This is just used to count how many enums there are. */
3103 /* Here is the table which drives this routine. So that we can
3104 format it pretty, we define some abbreviations for the
3105 enum bpstat_what codes. */
3106 #define kc BPSTAT_WHAT_KEEP_CHECKING
3107 #define ss BPSTAT_WHAT_STOP_SILENT
3108 #define sn BPSTAT_WHAT_STOP_NOISY
3109 #define sgl BPSTAT_WHAT_SINGLE
3110 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3111 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3112 #define sr BPSTAT_WHAT_STEP_RESUME
3113 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3115 /* "Can't happen." Might want to print an error message.
3116 abort() is not out of the question, but chances are GDB is just
3117 a bit confused, not unusable. */
3118 #define err BPSTAT_WHAT_STOP_NOISY
3120 /* Given an old action and a class, come up with a new action. */
3121 /* One interesting property of this table is that wp_silent is the same
3122 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3123 after stopping, the check for whether to step over a breakpoint
3124 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3125 reference to how we stopped. We retain separate wp_silent and
3126 bp_silent codes in case we want to change that someday.
3128 Another possibly interesting property of this table is that
3129 there's a partial ordering, priority-like, of the actions. Once
3130 you've decided that some action is appropriate, you'll never go
3131 back and decide something of a lower priority is better. The
3134 kc < clr sgl shl slr sn sr ss
3135 sgl < shl slr sn sr ss
3136 slr < err shl sn sr ss
3137 clr < err shl sn sr ss
3143 What I think this means is that we don't need a damned table
3144 here. If you just put the rows and columns in the right order,
3145 it'd look awfully regular. We could simply walk the bpstat list
3146 and choose the highest priority action we find, with a little
3147 logic to handle the 'err' cases. */
3149 /* step_resume entries: a step resume breakpoint overrides another
3150 breakpoint of signal handling (see comment in wait_for_inferior
3151 at where we set the step_resume breakpoint). */
3153 static const enum bpstat_what_main_action
3154 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3157 /* kc ss sn sgl slr clr sr shl
3160 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
},
3162 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3164 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3166 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
},
3168 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3170 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3172 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
},
3174 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
},
3176 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3178 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
}
3191 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3192 struct bpstat_what retval
;
3194 retval
.call_dummy
= 0;
3195 for (; bs
!= NULL
; bs
= bs
->next
)
3197 enum class bs_class
= no_effect
;
3198 if (bs
->breakpoint_at
== NULL
)
3199 /* I suspect this can happen if it was a momentary breakpoint
3200 which has since been deleted. */
3202 if (bs
->breakpoint_at
->owner
== NULL
)
3203 bs_class
= bp_nostop
;
3205 switch (bs
->breakpoint_at
->owner
->type
)
3211 case bp_hardware_breakpoint
:
3217 bs_class
= bp_noisy
;
3219 bs_class
= bp_silent
;
3222 bs_class
= bp_nostop
;
3225 case bp_hardware_watchpoint
:
3226 case bp_read_watchpoint
:
3227 case bp_access_watchpoint
:
3231 bs_class
= wp_noisy
;
3233 bs_class
= wp_silent
;
3236 /* There was a watchpoint, but we're not stopping.
3237 This requires no further action. */
3238 bs_class
= no_effect
;
3241 bs_class
= long_jump
;
3243 case bp_longjmp_resume
:
3244 bs_class
= long_resume
;
3246 case bp_step_resume
:
3249 bs_class
= step_resume
;
3252 /* It is for the wrong frame. */
3253 bs_class
= bp_nostop
;
3255 case bp_watchpoint_scope
:
3256 bs_class
= bp_nostop
;
3258 case bp_shlib_event
:
3259 bs_class
= shlib_event
;
3261 case bp_thread_event
:
3262 case bp_overlay_event
:
3263 bs_class
= bp_nostop
;
3269 bs_class
= bp_noisy
;
3271 bs_class
= bp_silent
;
3274 /* There was a catchpoint, but we're not stopping.
3275 This requires no further action. */
3276 bs_class
= no_effect
;
3279 /* Make sure the action is stop (silent or noisy),
3280 so infrun.c pops the dummy frame. */
3281 bs_class
= bp_silent
;
3282 retval
.call_dummy
= 1;
3285 current_action
= table
[(int) bs_class
][(int) current_action
];
3287 retval
.main_action
= current_action
;
3291 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3292 without hardware support). This isn't related to a specific bpstat,
3293 just to things like whether watchpoints are set. */
3296 bpstat_should_step (void)
3298 struct breakpoint
*b
;
3300 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3307 static void print_breakpoint_location (struct breakpoint
*b
,
3308 struct bp_location
*loc
,
3310 struct ui_stream
*stb
)
3315 = find_pc_sect_function (loc
->address
, loc
->section
);
3318 ui_out_text (uiout
, "in ");
3319 ui_out_field_string (uiout
, "func",
3320 SYMBOL_PRINT_NAME (sym
));
3321 ui_out_wrap_hint (uiout
, wrap_indent
);
3322 ui_out_text (uiout
, " at ");
3324 ui_out_field_string (uiout
, "file", b
->source_file
);
3325 ui_out_text (uiout
, ":");
3327 if (ui_out_is_mi_like_p (uiout
))
3329 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3330 char *fullname
= symtab_to_fullname (sal
.symtab
);
3333 ui_out_field_string (uiout
, "fullname", fullname
);
3336 ui_out_field_int (uiout
, "line", b
->line_number
);
3340 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3344 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3345 ui_out_field_stream (uiout
, "at", stb
);
3349 /* Print B to gdb_stdout. */
3351 print_one_breakpoint_location (struct breakpoint
*b
,
3352 struct bp_location
*loc
,
3354 CORE_ADDR
*last_addr
)
3356 struct command_line
*l
;
3358 struct ep_type_description
3363 static struct ep_type_description bptypes
[] =
3365 {bp_none
, "?deleted?"},
3366 {bp_breakpoint
, "breakpoint"},
3367 {bp_hardware_breakpoint
, "hw breakpoint"},
3368 {bp_until
, "until"},
3369 {bp_finish
, "finish"},
3370 {bp_watchpoint
, "watchpoint"},
3371 {bp_hardware_watchpoint
, "hw watchpoint"},
3372 {bp_read_watchpoint
, "read watchpoint"},
3373 {bp_access_watchpoint
, "acc watchpoint"},
3374 {bp_longjmp
, "longjmp"},
3375 {bp_longjmp_resume
, "longjmp resume"},
3376 {bp_step_resume
, "step resume"},
3377 {bp_watchpoint_scope
, "watchpoint scope"},
3378 {bp_call_dummy
, "call dummy"},
3379 {bp_shlib_event
, "shlib events"},
3380 {bp_thread_event
, "thread events"},
3381 {bp_overlay_event
, "overlay events"},
3382 {bp_catchpoint
, "catchpoint"},
3385 static char bpenables
[] = "nynny";
3386 char wrap_indent
[80];
3387 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3388 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3389 struct cleanup
*bkpt_chain
;
3391 int header_of_multiple
= 0;
3392 int part_of_multiple
= (loc
!= NULL
);
3393 struct value_print_options opts
;
3395 get_user_print_options (&opts
);
3397 gdb_assert (!loc
|| loc_number
!= 0);
3398 /* See comment in print_one_breakpoint concerning
3399 treatment of breakpoints with single disabled
3403 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3404 header_of_multiple
= 1;
3409 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3413 if (part_of_multiple
)
3416 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3417 ui_out_field_string (uiout
, "number", formatted
);
3422 ui_out_field_int (uiout
, "number", b
->number
);
3427 if (part_of_multiple
)
3428 ui_out_field_skip (uiout
, "type");
3431 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3432 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3433 internal_error (__FILE__
, __LINE__
,
3434 _("bptypes table does not describe type #%d."),
3436 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3441 if (part_of_multiple
)
3442 ui_out_field_skip (uiout
, "disp");
3444 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3449 if (part_of_multiple
)
3450 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3452 ui_out_field_fmt (uiout
, "enabled", "%c",
3453 bpenables
[(int) b
->enable_state
]);
3454 ui_out_spaces (uiout
, 2);
3458 strcpy (wrap_indent
, " ");
3459 if (opts
.addressprint
)
3461 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3462 strcat (wrap_indent
, " ");
3464 strcat (wrap_indent
, " ");
3467 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3469 /* Although the print_one can possibly print
3470 all locations, calling it here is not likely
3471 to get any nice result. So, make sure there's
3472 just one location. */
3473 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3474 b
->ops
->print_one (b
, last_addr
);
3480 internal_error (__FILE__
, __LINE__
,
3481 _("print_one_breakpoint: bp_none encountered\n"));
3485 case bp_hardware_watchpoint
:
3486 case bp_read_watchpoint
:
3487 case bp_access_watchpoint
:
3488 /* Field 4, the address, is omitted (which makes the columns
3489 not line up too nicely with the headers, but the effect
3490 is relatively readable). */
3491 if (opts
.addressprint
)
3492 ui_out_field_skip (uiout
, "addr");
3494 ui_out_field_string (uiout
, "what", b
->exp_string
);
3498 case bp_hardware_breakpoint
:
3502 case bp_longjmp_resume
:
3503 case bp_step_resume
:
3504 case bp_watchpoint_scope
:
3506 case bp_shlib_event
:
3507 case bp_thread_event
:
3508 case bp_overlay_event
:
3509 if (opts
.addressprint
)
3512 if (header_of_multiple
)
3513 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3514 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3515 ui_out_field_string (uiout
, "addr", "<PENDING>");
3517 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3520 if (!header_of_multiple
)
3521 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3523 *last_addr
= b
->loc
->address
;
3527 if (!part_of_multiple
&& b
->thread
!= -1)
3529 /* FIXME: This seems to be redundant and lost here; see the
3530 "stop only in" line a little further down. */
3531 ui_out_text (uiout
, " thread ");
3532 ui_out_field_int (uiout
, "thread", b
->thread
);
3535 ui_out_text (uiout
, "\n");
3537 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3540 ui_out_text (uiout
, "\tstop only in stack frame at ");
3541 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3543 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3544 ui_out_text (uiout
, "\n");
3547 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3549 /* We do not print the condition for Ada exception catchpoints
3550 because the condition is an internal implementation detail
3551 that we do not want to expose to the user. */
3553 ui_out_text (uiout
, "\tstop only if ");
3554 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3555 ui_out_text (uiout
, "\n");
3558 if (!part_of_multiple
&& b
->thread
!= -1)
3560 /* FIXME should make an annotation for this */
3561 ui_out_text (uiout
, "\tstop only in thread ");
3562 ui_out_field_int (uiout
, "thread", b
->thread
);
3563 ui_out_text (uiout
, "\n");
3566 if (!part_of_multiple
&& b
->hit_count
)
3568 /* FIXME should make an annotation for this */
3569 if (ep_is_catchpoint (b
))
3570 ui_out_text (uiout
, "\tcatchpoint");
3572 ui_out_text (uiout
, "\tbreakpoint");
3573 ui_out_text (uiout
, " already hit ");
3574 ui_out_field_int (uiout
, "times", b
->hit_count
);
3575 if (b
->hit_count
== 1)
3576 ui_out_text (uiout
, " time\n");
3578 ui_out_text (uiout
, " times\n");
3581 /* Output the count also if it is zero, but only if this is
3582 mi. FIXME: Should have a better test for this. */
3583 if (ui_out_is_mi_like_p (uiout
))
3584 if (!part_of_multiple
&& b
->hit_count
== 0)
3585 ui_out_field_int (uiout
, "times", b
->hit_count
);
3587 if (!part_of_multiple
&& b
->ignore_count
)
3590 ui_out_text (uiout
, "\tignore next ");
3591 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3592 ui_out_text (uiout
, " hits\n");
3595 if (!part_of_multiple
&& (l
= b
->commands
))
3597 struct cleanup
*script_chain
;
3600 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3601 print_command_lines (uiout
, l
, 4);
3602 do_cleanups (script_chain
);
3605 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3608 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3609 else if (b
->exp_string
)
3610 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3613 do_cleanups (bkpt_chain
);
3614 do_cleanups (old_chain
);
3618 print_one_breakpoint (struct breakpoint
*b
,
3619 CORE_ADDR
*last_addr
)
3621 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3623 /* If this breakpoint has custom print function,
3624 it's already printed. Otherwise, print individual
3625 locations, if any. */
3626 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3628 /* If breakpoint has a single location that is
3629 disabled, we print it as if it had
3630 several locations, since otherwise it's hard to
3631 represent "breakpoint enabled, location disabled"
3633 Note that while hardware watchpoints have
3634 several locations internally, that's no a property
3637 && !is_hardware_watchpoint (b
)
3638 && (b
->loc
->next
|| !b
->loc
->enabled
)
3639 && !ui_out_is_mi_like_p (uiout
))
3641 struct bp_location
*loc
;
3643 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3644 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3650 struct captured_breakpoint_query_args
3656 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3658 struct captured_breakpoint_query_args
*args
= data
;
3659 struct breakpoint
*b
;
3660 CORE_ADDR dummy_addr
= 0;
3663 if (args
->bnum
== b
->number
)
3665 print_one_breakpoint (b
, &dummy_addr
);
3673 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3675 struct captured_breakpoint_query_args args
;
3677 /* For the moment we don't trust print_one_breakpoint() to not throw
3679 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3680 error_message
, RETURN_MASK_ALL
) < 0)
3686 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3687 catchpoints, et.al.). */
3690 user_settable_breakpoint (const struct breakpoint
*b
)
3692 return (b
->type
== bp_breakpoint
3693 || b
->type
== bp_catchpoint
3694 || b
->type
== bp_hardware_breakpoint
3695 || b
->type
== bp_watchpoint
3696 || b
->type
== bp_read_watchpoint
3697 || b
->type
== bp_access_watchpoint
3698 || b
->type
== bp_hardware_watchpoint
);
3701 /* Print information on user settable breakpoint (watchpoint, etc)
3702 number BNUM. If BNUM is -1 print all user settable breakpoints.
3703 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3706 breakpoint_1 (int bnum
, int allflag
)
3708 struct breakpoint
*b
;
3709 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3710 int nr_printable_breakpoints
;
3711 struct cleanup
*bkpttbl_chain
;
3712 struct value_print_options opts
;
3714 get_user_print_options (&opts
);
3716 /* Compute the number of rows in the table. */
3717 nr_printable_breakpoints
= 0;
3720 || bnum
== b
->number
)
3722 if (allflag
|| user_settable_breakpoint (b
))
3723 nr_printable_breakpoints
++;
3726 if (opts
.addressprint
)
3728 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3732 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3735 if (nr_printable_breakpoints
> 0)
3736 annotate_breakpoints_headers ();
3737 if (nr_printable_breakpoints
> 0)
3739 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3740 if (nr_printable_breakpoints
> 0)
3742 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3743 if (nr_printable_breakpoints
> 0)
3745 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3746 if (nr_printable_breakpoints
> 0)
3748 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3749 if (opts
.addressprint
)
3751 if (nr_printable_breakpoints
> 0)
3753 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3754 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3756 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3758 if (nr_printable_breakpoints
> 0)
3760 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3761 ui_out_table_body (uiout
);
3762 if (nr_printable_breakpoints
> 0)
3763 annotate_breakpoints_table ();
3767 || bnum
== b
->number
)
3769 /* We only print out user settable breakpoints unless the
3771 if (allflag
|| user_settable_breakpoint (b
))
3772 print_one_breakpoint (b
, &last_addr
);
3775 do_cleanups (bkpttbl_chain
);
3777 if (nr_printable_breakpoints
== 0)
3780 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3782 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3787 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3788 that a comparison of an unsigned with -1 is always false. */
3789 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3790 set_next_address (current_gdbarch
, last_addr
);
3793 /* FIXME? Should this be moved up so that it is only called when
3794 there have been breakpoints? */
3795 annotate_breakpoints_table_end ();
3799 breakpoints_info (char *bnum_exp
, int from_tty
)
3804 bnum
= parse_and_eval_long (bnum_exp
);
3806 breakpoint_1 (bnum
, 0);
3810 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3815 bnum
= parse_and_eval_long (bnum_exp
);
3817 breakpoint_1 (bnum
, 1);
3821 breakpoint_has_pc (struct breakpoint
*b
,
3822 CORE_ADDR pc
, struct obj_section
*section
)
3824 struct bp_location
*bl
= b
->loc
;
3825 for (; bl
; bl
= bl
->next
)
3827 if (bl
->address
== pc
3828 && (!overlay_debugging
|| bl
->section
== section
))
3834 /* Print a message describing any breakpoints set at PC. */
3837 describe_other_breakpoints (CORE_ADDR pc
, struct obj_section
*section
,
3841 struct breakpoint
*b
;
3844 others
+= breakpoint_has_pc (b
, pc
, section
);
3848 printf_filtered (_("Note: breakpoint "));
3849 else /* if (others == ???) */
3850 printf_filtered (_("Note: breakpoints "));
3852 if (breakpoint_has_pc (b
, pc
, section
))
3855 printf_filtered ("%d", b
->number
);
3856 if (b
->thread
== -1 && thread
!= -1)
3857 printf_filtered (" (all threads)");
3858 else if (b
->thread
!= -1)
3859 printf_filtered (" (thread %d)", b
->thread
);
3860 printf_filtered ("%s%s ",
3861 ((b
->enable_state
== bp_disabled
||
3862 b
->enable_state
== bp_call_disabled
)
3864 : b
->enable_state
== bp_permanent
3868 : ((others
== 1) ? " and" : ""));
3870 printf_filtered (_("also set at pc "));
3871 fputs_filtered (paddress (pc
), gdb_stdout
);
3872 printf_filtered (".\n");
3876 /* Set the default place to put a breakpoint
3877 for the `break' command with no arguments. */
3880 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3883 default_breakpoint_valid
= valid
;
3884 default_breakpoint_address
= addr
;
3885 default_breakpoint_symtab
= symtab
;
3886 default_breakpoint_line
= line
;
3889 /* Return true iff it is meaningful to use the address member of
3890 BPT. For some breakpoint types, the address member is irrelevant
3891 and it makes no sense to attempt to compare it to other addresses
3892 (or use it for any other purpose either).
3894 More specifically, each of the following breakpoint types will always
3895 have a zero valued address and we don't want check_duplicates() to mark
3896 breakpoints of any of these types to be a duplicate of an actual
3897 breakpoint at address zero:
3900 bp_hardware_watchpoint
3902 bp_access_watchpoint
3906 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3908 enum bptype type
= bpt
->type
;
3910 return (type
!= bp_watchpoint
3911 && type
!= bp_hardware_watchpoint
3912 && type
!= bp_read_watchpoint
3913 && type
!= bp_access_watchpoint
3914 && type
!= bp_catchpoint
);
3917 /* Rescan breakpoints at the same address and section as BPT,
3918 marking the first one as "first" and any others as "duplicates".
3919 This is so that the bpt instruction is only inserted once.
3920 If we have a permanent breakpoint at the same place as BPT, make
3921 that one the official one, and the rest as duplicates. */
3924 check_duplicates_for (CORE_ADDR address
, struct obj_section
*section
)
3926 struct bp_location
*b
;
3928 struct bp_location
*perm_bp
= 0;
3930 ALL_BP_LOCATIONS (b
)
3931 if (b
->owner
->enable_state
!= bp_disabled
3932 && b
->owner
->enable_state
!= bp_call_disabled
3934 && !b
->shlib_disabled
3935 && b
->address
== address
/* address / overlay match */
3936 && (!overlay_debugging
|| b
->section
== section
)
3937 && breakpoint_address_is_meaningful (b
->owner
))
3939 /* Have we found a permanent breakpoint? */
3940 if (b
->owner
->enable_state
== bp_permanent
)
3947 b
->duplicate
= count
> 1;
3950 /* If we found a permanent breakpoint at this address, go over the
3951 list again and declare all the other breakpoints there to be the
3955 perm_bp
->duplicate
= 0;
3957 /* Permanent breakpoint should always be inserted. */
3958 if (! perm_bp
->inserted
)
3959 internal_error (__FILE__
, __LINE__
,
3960 _("allegedly permanent breakpoint is not "
3961 "actually inserted"));
3963 ALL_BP_LOCATIONS (b
)
3966 if (b
->owner
->enable_state
!= bp_disabled
3967 && b
->owner
->enable_state
!= bp_call_disabled
3968 && b
->enabled
&& !b
->shlib_disabled
3969 && b
->address
== address
/* address / overlay match */
3970 && (!overlay_debugging
|| b
->section
== section
)
3971 && breakpoint_address_is_meaningful (b
->owner
))
3974 internal_error (__FILE__
, __LINE__
,
3975 _("another breakpoint was inserted on top of "
3976 "a permanent breakpoint"));
3985 check_duplicates (struct breakpoint
*bpt
)
3987 struct bp_location
*bl
= bpt
->loc
;
3989 if (! breakpoint_address_is_meaningful (bpt
))
3992 for (; bl
; bl
= bl
->next
)
3993 check_duplicates_for (bl
->address
, bl
->section
);
3997 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3998 int bnum
, int have_bnum
)
4003 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4004 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4006 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4007 bnum
, astr1
, astr2
);
4009 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4012 /* Adjust a breakpoint's address to account for architectural constraints
4013 on breakpoint placement. Return the adjusted address. Note: Very
4014 few targets require this kind of adjustment. For most targets,
4015 this function is simply the identity function. */
4018 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4020 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4022 /* Very few targets need any kind of breakpoint adjustment. */
4025 else if (bptype
== bp_watchpoint
4026 || bptype
== bp_hardware_watchpoint
4027 || bptype
== bp_read_watchpoint
4028 || bptype
== bp_access_watchpoint
4029 || bptype
== bp_catchpoint
)
4031 /* Watchpoints and the various bp_catch_* eventpoints should not
4032 have their addresses modified. */
4037 CORE_ADDR adjusted_bpaddr
;
4039 /* Some targets have architectural constraints on the placement
4040 of breakpoint instructions. Obtain the adjusted address. */
4041 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4044 /* An adjusted breakpoint address can significantly alter
4045 a user's expectations. Print a warning if an adjustment
4047 if (adjusted_bpaddr
!= bpaddr
)
4048 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4050 return adjusted_bpaddr
;
4054 /* Allocate a struct bp_location. */
4056 static struct bp_location
*
4057 allocate_bp_location (struct breakpoint
*bpt
)
4059 struct bp_location
*loc
, *loc_p
;
4061 loc
= xmalloc (sizeof (struct bp_location
));
4062 memset (loc
, 0, sizeof (*loc
));
4066 loc
->shlib_disabled
= 0;
4075 case bp_longjmp_resume
:
4076 case bp_step_resume
:
4077 case bp_watchpoint_scope
:
4079 case bp_shlib_event
:
4080 case bp_thread_event
:
4081 case bp_overlay_event
:
4082 loc
->loc_type
= bp_loc_software_breakpoint
;
4084 case bp_hardware_breakpoint
:
4085 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4087 case bp_hardware_watchpoint
:
4088 case bp_read_watchpoint
:
4089 case bp_access_watchpoint
:
4090 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4094 loc
->loc_type
= bp_loc_other
;
4097 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4103 static void free_bp_location (struct bp_location
*loc
)
4108 if (loc
->function_name
)
4109 xfree (loc
->function_name
);
4114 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4115 that has type BPTYPE and has no locations as yet. */
4117 static struct breakpoint
*
4118 set_raw_breakpoint_without_location (enum bptype bptype
)
4120 struct breakpoint
*b
, *b1
;
4122 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4123 memset (b
, 0, sizeof (*b
));
4126 b
->language
= current_language
->la_language
;
4127 b
->input_radix
= input_radix
;
4129 b
->enable_state
= bp_enabled
;
4132 b
->ignore_count
= 0;
4134 b
->frame_id
= null_frame_id
;
4135 b
->forked_inferior_pid
= null_ptid
;
4136 b
->exec_pathname
= NULL
;
4138 b
->condition_not_parsed
= 0;
4140 /* Add this breakpoint to the end of the chain
4141 so that a list of breakpoints will come out in order
4142 of increasing numbers. */
4144 b1
= breakpoint_chain
;
4146 breakpoint_chain
= b
;
4156 /* Initialize loc->function_name. */
4158 set_breakpoint_location_function (struct bp_location
*loc
)
4160 if (loc
->owner
->type
== bp_breakpoint
4161 || loc
->owner
->type
== bp_hardware_breakpoint
)
4163 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4165 if (loc
->function_name
)
4166 loc
->function_name
= xstrdup (loc
->function_name
);
4170 /* set_raw_breakpoint is a low level routine for allocating and
4171 partially initializing a breakpoint of type BPTYPE. The newly
4172 created breakpoint's address, section, source file name, and line
4173 number are provided by SAL. The newly created and partially
4174 initialized breakpoint is added to the breakpoint chain and
4175 is also returned as the value of this function.
4177 It is expected that the caller will complete the initialization of
4178 the newly created breakpoint struct as well as output any status
4179 information regarding the creation of a new breakpoint. In
4180 particular, set_raw_breakpoint does NOT set the breakpoint
4181 number! Care should be taken to not allow an error to occur
4182 prior to completing the initialization of the breakpoint. If this
4183 should happen, a bogus breakpoint will be left on the chain. */
4186 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4188 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4189 CORE_ADDR adjusted_address
;
4191 /* Adjust the breakpoint's address prior to allocating a location.
4192 Once we call allocate_bp_location(), that mostly uninitialized
4193 location will be placed on the location chain. Adjustment of the
4194 breakpoint may cause target_read_memory() to be called and we do
4195 not want its scan of the location chain to find a breakpoint and
4196 location that's only been partially initialized. */
4197 adjusted_address
= adjust_breakpoint_address (sal
.pc
, b
->type
);
4199 b
->loc
= allocate_bp_location (b
);
4200 b
->loc
->requested_address
= sal
.pc
;
4201 b
->loc
->address
= adjusted_address
;
4203 if (sal
.symtab
== NULL
)
4204 b
->source_file
= NULL
;
4206 b
->source_file
= savestring (sal
.symtab
->filename
,
4207 strlen (sal
.symtab
->filename
));
4208 b
->loc
->section
= sal
.section
;
4209 b
->line_number
= sal
.line
;
4211 set_breakpoint_location_function (b
->loc
);
4213 breakpoints_changed ();
4219 /* Note that the breakpoint object B describes a permanent breakpoint
4220 instruction, hard-wired into the inferior's code. */
4222 make_breakpoint_permanent (struct breakpoint
*b
)
4224 struct bp_location
*bl
;
4225 b
->enable_state
= bp_permanent
;
4227 /* By definition, permanent breakpoints are already present in the code.
4228 Mark all locations as inserted. For now, make_breakpoint_permanent
4229 is called in just one place, so it's hard to say if it's reasonable
4230 to have permanent breakpoint with multiple locations or not,
4231 but it's easy to implmement. */
4232 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4236 static struct breakpoint
*
4237 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4239 static int internal_breakpoint_number
= -1;
4240 struct symtab_and_line sal
;
4241 struct breakpoint
*b
;
4243 init_sal (&sal
); /* initialize to zeroes */
4246 sal
.section
= find_pc_overlay (sal
.pc
);
4248 b
= set_raw_breakpoint (sal
, type
);
4249 b
->number
= internal_breakpoint_number
--;
4250 b
->disposition
= disp_donttouch
;
4257 create_longjmp_breakpoint (char *func_name
)
4259 struct minimal_symbol
*m
;
4261 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4263 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4264 update_global_location_list (1);
4267 /* Call this routine when stepping and nexting to enable a breakpoint
4268 if we do a longjmp(). When we hit that breakpoint, call
4269 set_longjmp_resume_breakpoint() to figure out where we are going. */
4272 set_longjmp_breakpoint (void)
4274 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4276 create_longjmp_breakpoint ("longjmp");
4277 create_longjmp_breakpoint ("_longjmp");
4278 create_longjmp_breakpoint ("siglongjmp");
4279 create_longjmp_breakpoint ("_siglongjmp");
4283 /* Delete all longjmp breakpoints from THREAD. */
4285 delete_longjmp_breakpoint (int thread
)
4287 struct breakpoint
*b
, *temp
;
4289 ALL_BREAKPOINTS_SAFE (b
, temp
)
4290 if (b
->type
== bp_longjmp
)
4292 if (b
->thread
== thread
)
4293 delete_breakpoint (b
);
4298 create_overlay_event_breakpoint_1 (char *func_name
, struct objfile
*objfile
)
4300 struct breakpoint
*b
;
4301 struct minimal_symbol
*m
;
4303 if ((m
= lookup_minimal_symbol_text (func_name
, objfile
)) == NULL
)
4306 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4308 b
->addr_string
= xstrdup (func_name
);
4310 if (overlay_debugging
== ovly_auto
)
4312 b
->enable_state
= bp_enabled
;
4313 overlay_events_enabled
= 1;
4317 b
->enable_state
= bp_disabled
;
4318 overlay_events_enabled
= 0;
4320 update_global_location_list (1);
4324 create_overlay_event_breakpoint (char *func_name
)
4326 struct objfile
*objfile
;
4327 ALL_OBJFILES (objfile
)
4328 create_overlay_event_breakpoint_1 (func_name
, objfile
);
4332 enable_overlay_breakpoints (void)
4334 struct breakpoint
*b
;
4337 if (b
->type
== bp_overlay_event
)
4339 b
->enable_state
= bp_enabled
;
4340 update_global_location_list (1);
4341 overlay_events_enabled
= 1;
4346 disable_overlay_breakpoints (void)
4348 struct breakpoint
*b
;
4351 if (b
->type
== bp_overlay_event
)
4353 b
->enable_state
= bp_disabled
;
4354 update_global_location_list (0);
4355 overlay_events_enabled
= 0;
4360 create_thread_event_breakpoint (CORE_ADDR address
)
4362 struct breakpoint
*b
;
4364 b
= create_internal_breakpoint (address
, bp_thread_event
);
4366 b
->enable_state
= bp_enabled
;
4367 /* addr_string has to be used or breakpoint_re_set will delete me. */
4368 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4370 update_global_location_list_nothrow (1);
4376 remove_thread_event_breakpoints (void)
4378 struct breakpoint
*b
, *temp
;
4380 ALL_BREAKPOINTS_SAFE (b
, temp
)
4381 if (b
->type
== bp_thread_event
)
4382 delete_breakpoint (b
);
4385 struct captured_parse_breakpoint_args
4388 struct symtabs_and_lines
*sals_p
;
4389 char ***addr_string_p
;
4393 struct lang_and_radix
4401 remove_solib_event_breakpoints (void)
4403 struct breakpoint
*b
, *temp
;
4405 ALL_BREAKPOINTS_SAFE (b
, temp
)
4406 if (b
->type
== bp_shlib_event
)
4407 delete_breakpoint (b
);
4411 create_solib_event_breakpoint (CORE_ADDR address
)
4413 struct breakpoint
*b
;
4415 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4416 update_global_location_list_nothrow (1);
4420 /* Disable any breakpoints that are on code in shared libraries. Only
4421 apply to enabled breakpoints, disabled ones can just stay disabled. */
4424 disable_breakpoints_in_shlibs (void)
4426 struct bp_location
*loc
;
4427 int disabled_shlib_breaks
= 0;
4429 ALL_BP_LOCATIONS (loc
)
4431 struct breakpoint
*b
= loc
->owner
;
4432 /* We apply the check to all breakpoints, including disabled
4433 for those with loc->duplicate set. This is so that when breakpoint
4434 becomes enabled, or the duplicate is removed, gdb will try to insert
4435 all breakpoints. If we don't set shlib_disabled here, we'll try
4436 to insert those breakpoints and fail. */
4437 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4438 && !loc
->shlib_disabled
4440 && PC_SOLIB (loc
->address
)
4442 && solib_address (loc
->address
)
4446 loc
->shlib_disabled
= 1;
4451 /* Disable any breakpoints that are in in an unloaded shared library. Only
4452 apply to enabled breakpoints, disabled ones can just stay disabled. */
4455 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4457 struct bp_location
*loc
;
4458 int disabled_shlib_breaks
= 0;
4460 ALL_BP_LOCATIONS (loc
)
4462 struct breakpoint
*b
= loc
->owner
;
4463 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4464 || loc
->loc_type
== bp_loc_software_breakpoint
)
4465 && !loc
->shlib_disabled
)
4468 char *so_name
= PC_SOLIB (loc
->address
);
4470 char *so_name
= solib_address (loc
->address
);
4472 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4474 loc
->shlib_disabled
= 1;
4475 /* At this point, we cannot rely on remove_breakpoint
4476 succeeding so we must mark the breakpoint as not inserted
4477 to prevent future errors occurring in remove_breakpoints. */
4479 if (!disabled_shlib_breaks
)
4481 target_terminal_ours_for_output ();
4482 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4485 disabled_shlib_breaks
= 1;
4491 /* FORK & VFORK catchpoints. */
4493 /* Implement the "insert" breakpoint_ops method for fork catchpoints. */
4496 insert_catch_fork (struct breakpoint
*b
)
4498 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
4501 /* Implement the "remove" breakpoint_ops method for fork catchpoints. */
4504 remove_catch_fork (struct breakpoint
*b
)
4506 return target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
4509 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
4513 breakpoint_hit_catch_fork (struct breakpoint
*b
)
4515 return inferior_has_forked (inferior_ptid
, &b
->forked_inferior_pid
);
4518 /* Implement the "print_it" breakpoint_ops method for fork catchpoints. */
4520 static enum print_stop_action
4521 print_it_catch_fork (struct breakpoint
*b
)
4523 annotate_catchpoint (b
->number
);
4524 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
4525 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4526 return PRINT_SRC_AND_LOC
;
4529 /* Implement the "print_one" breakpoint_ops method for fork catchpoints. */
4532 print_one_catch_fork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4534 struct value_print_options opts
;
4536 get_user_print_options (&opts
);
4538 /* Field 4, the address, is omitted (which makes the columns
4539 not line up too nicely with the headers, but the effect
4540 is relatively readable). */
4541 if (opts
.addressprint
)
4542 ui_out_field_skip (uiout
, "addr");
4544 ui_out_text (uiout
, "fork");
4545 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4547 ui_out_text (uiout
, ", process ");
4548 ui_out_field_int (uiout
, "what",
4549 ptid_get_pid (b
->forked_inferior_pid
));
4550 ui_out_spaces (uiout
, 1);
4554 /* Implement the "print_mention" breakpoint_ops method for fork
4558 print_mention_catch_fork (struct breakpoint
*b
)
4560 printf_filtered (_("Catchpoint %d (fork)"), b
->number
);
4563 /* The breakpoint_ops structure to be used in fork catchpoints. */
4565 static struct breakpoint_ops catch_fork_breakpoint_ops
=
4569 breakpoint_hit_catch_fork
,
4570 print_it_catch_fork
,
4571 print_one_catch_fork
,
4572 print_mention_catch_fork
4575 /* Implement the "insert" breakpoint_ops method for vfork catchpoints. */
4578 insert_catch_vfork (struct breakpoint
*b
)
4580 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
4583 /* Implement the "remove" breakpoint_ops method for vfork catchpoints. */
4586 remove_catch_vfork (struct breakpoint
*b
)
4588 return target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
4591 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
4595 breakpoint_hit_catch_vfork (struct breakpoint
*b
)
4597 return inferior_has_vforked (inferior_ptid
, &b
->forked_inferior_pid
);
4600 /* Implement the "print_it" breakpoint_ops method for vfork catchpoints. */
4602 static enum print_stop_action
4603 print_it_catch_vfork (struct breakpoint
*b
)
4605 annotate_catchpoint (b
->number
);
4606 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
4607 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4608 return PRINT_SRC_AND_LOC
;
4611 /* Implement the "print_one" breakpoint_ops method for vfork catchpoints. */
4614 print_one_catch_vfork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4616 struct value_print_options opts
;
4618 get_user_print_options (&opts
);
4619 /* Field 4, the address, is omitted (which makes the columns
4620 not line up too nicely with the headers, but the effect
4621 is relatively readable). */
4622 if (opts
.addressprint
)
4623 ui_out_field_skip (uiout
, "addr");
4625 ui_out_text (uiout
, "vfork");
4626 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4628 ui_out_text (uiout
, ", process ");
4629 ui_out_field_int (uiout
, "what",
4630 ptid_get_pid (b
->forked_inferior_pid
));
4631 ui_out_spaces (uiout
, 1);
4635 /* Implement the "print_mention" breakpoint_ops method for vfork
4639 print_mention_catch_vfork (struct breakpoint
*b
)
4641 printf_filtered (_("Catchpoint %d (vfork)"), b
->number
);
4644 /* The breakpoint_ops structure to be used in vfork catchpoints. */
4646 static struct breakpoint_ops catch_vfork_breakpoint_ops
=
4650 breakpoint_hit_catch_vfork
,
4651 print_it_catch_vfork
,
4652 print_one_catch_vfork
,
4653 print_mention_catch_vfork
4656 /* Create a new breakpoint of the bp_catchpoint kind and return it.
4658 If TEMPFLAG is non-zero, then make the breakpoint temporary.
4659 If COND_STRING is not NULL, then store it in the breakpoint.
4660 OPS, if not NULL, is the breakpoint_ops structure associated
4661 to the catchpoint. */
4663 static struct breakpoint
*
4664 create_catchpoint (int tempflag
, char *cond_string
,
4665 struct breakpoint_ops
*ops
)
4667 struct symtab_and_line sal
;
4668 struct breakpoint
*b
;
4675 b
= set_raw_breakpoint (sal
, bp_catchpoint
);
4676 set_breakpoint_count (breakpoint_count
+ 1);
4677 b
->number
= breakpoint_count
;
4679 b
->cond_string
= (cond_string
== NULL
) ?
4680 NULL
: savestring (cond_string
, strlen (cond_string
));
4682 b
->addr_string
= NULL
;
4683 b
->enable_state
= bp_enabled
;
4684 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4688 update_global_location_list (1);
4694 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4695 struct breakpoint_ops
*ops
)
4697 struct breakpoint
*b
= create_catchpoint (tempflag
, cond_string
, ops
);
4699 /* FIXME: We should put this information in a breakpoint private data
4701 b
->forked_inferior_pid
= null_ptid
;
4704 /* Exec catchpoints. */
4707 insert_catch_exec (struct breakpoint
*b
)
4709 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
4713 remove_catch_exec (struct breakpoint
*b
)
4715 return target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
4719 breakpoint_hit_catch_exec (struct breakpoint
*b
)
4721 return inferior_has_execd (inferior_ptid
, &b
->exec_pathname
);
4724 static enum print_stop_action
4725 print_it_catch_exec (struct breakpoint
*b
)
4727 annotate_catchpoint (b
->number
);
4728 printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b
->number
,
4730 return PRINT_SRC_AND_LOC
;
4734 print_one_catch_exec (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4736 struct value_print_options opts
;
4738 get_user_print_options (&opts
);
4740 /* Field 4, the address, is omitted (which makes the columns
4741 not line up too nicely with the headers, but the effect
4742 is relatively readable). */
4743 if (opts
.addressprint
)
4744 ui_out_field_skip (uiout
, "addr");
4746 ui_out_text (uiout
, "exec");
4747 if (b
->exec_pathname
!= NULL
)
4749 ui_out_text (uiout
, ", program \"");
4750 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
4751 ui_out_text (uiout
, "\" ");
4756 print_mention_catch_exec (struct breakpoint
*b
)
4758 printf_filtered (_("Catchpoint %d (exec)"), b
->number
);
4761 static struct breakpoint_ops catch_exec_breakpoint_ops
=
4765 breakpoint_hit_catch_exec
,
4766 print_it_catch_exec
,
4767 print_one_catch_exec
,
4768 print_mention_catch_exec
4772 hw_breakpoint_used_count (void)
4774 struct breakpoint
*b
;
4779 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
4787 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4789 struct breakpoint
*b
;
4792 *other_type_used
= 0;
4795 if (breakpoint_enabled (b
))
4797 if (b
->type
== type
)
4799 else if ((b
->type
== bp_hardware_watchpoint
||
4800 b
->type
== bp_read_watchpoint
||
4801 b
->type
== bp_access_watchpoint
))
4802 *other_type_used
= 1;
4809 disable_watchpoints_before_interactive_call_start (void)
4811 struct breakpoint
*b
;
4815 if (((b
->type
== bp_watchpoint
)
4816 || (b
->type
== bp_hardware_watchpoint
)
4817 || (b
->type
== bp_read_watchpoint
)
4818 || (b
->type
== bp_access_watchpoint
))
4819 && breakpoint_enabled (b
))
4821 b
->enable_state
= bp_call_disabled
;
4822 update_global_location_list (0);
4828 enable_watchpoints_after_interactive_call_stop (void)
4830 struct breakpoint
*b
;
4834 if (((b
->type
== bp_watchpoint
)
4835 || (b
->type
== bp_hardware_watchpoint
)
4836 || (b
->type
== bp_read_watchpoint
)
4837 || (b
->type
== bp_access_watchpoint
))
4838 && (b
->enable_state
== bp_call_disabled
))
4840 b
->enable_state
= bp_enabled
;
4841 update_global_location_list (1);
4847 /* Set a breakpoint that will evaporate an end of command
4848 at address specified by SAL.
4849 Restrict it to frame FRAME if FRAME is nonzero. */
4852 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4855 struct breakpoint
*b
;
4856 b
= set_raw_breakpoint (sal
, type
);
4857 b
->enable_state
= bp_enabled
;
4858 b
->disposition
= disp_donttouch
;
4859 b
->frame_id
= frame_id
;
4861 /* If we're debugging a multi-threaded program, then we
4862 want momentary breakpoints to be active in only a
4863 single thread of control. */
4864 if (in_thread_list (inferior_ptid
))
4865 b
->thread
= pid_to_thread_id (inferior_ptid
);
4867 update_global_location_list_nothrow (1);
4873 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
4875 struct symtab_and_line sal
;
4877 sal
= find_pc_line (pc
, 0);
4879 sal
.section
= find_pc_overlay (pc
);
4880 sal
.explicit_pc
= 1;
4882 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
4886 /* Tell the user we have just set a breakpoint B. */
4889 mention (struct breakpoint
*b
)
4892 struct cleanup
*ui_out_chain
;
4893 struct value_print_options opts
;
4895 get_user_print_options (&opts
);
4897 /* FIXME: This is misplaced; mention() is called by things (like
4898 hitting a watchpoint) other than breakpoint creation. It should
4899 be possible to clean this up and at the same time replace the
4900 random calls to breakpoint_changed with this hook. */
4901 observer_notify_breakpoint_created (b
->number
);
4903 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4904 b
->ops
->print_mention (b
);
4909 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4912 ui_out_text (uiout
, "Watchpoint ");
4913 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4914 ui_out_field_int (uiout
, "number", b
->number
);
4915 ui_out_text (uiout
, ": ");
4916 ui_out_field_string (uiout
, "exp", b
->exp_string
);
4917 do_cleanups (ui_out_chain
);
4919 case bp_hardware_watchpoint
:
4920 ui_out_text (uiout
, "Hardware watchpoint ");
4921 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4922 ui_out_field_int (uiout
, "number", b
->number
);
4923 ui_out_text (uiout
, ": ");
4924 ui_out_field_string (uiout
, "exp", b
->exp_string
);
4925 do_cleanups (ui_out_chain
);
4927 case bp_read_watchpoint
:
4928 ui_out_text (uiout
, "Hardware read watchpoint ");
4929 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4930 ui_out_field_int (uiout
, "number", b
->number
);
4931 ui_out_text (uiout
, ": ");
4932 ui_out_field_string (uiout
, "exp", b
->exp_string
);
4933 do_cleanups (ui_out_chain
);
4935 case bp_access_watchpoint
:
4936 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4937 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4938 ui_out_field_int (uiout
, "number", b
->number
);
4939 ui_out_text (uiout
, ": ");
4940 ui_out_field_string (uiout
, "exp", b
->exp_string
);
4941 do_cleanups (ui_out_chain
);
4944 if (ui_out_is_mi_like_p (uiout
))
4949 if (b
->disposition
== disp_del
)
4950 printf_filtered (_("Temporary breakpoint"));
4952 printf_filtered (_("Breakpoint"));
4953 printf_filtered (_(" %d"), b
->number
);
4956 case bp_hardware_breakpoint
:
4957 if (ui_out_is_mi_like_p (uiout
))
4962 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4969 case bp_longjmp_resume
:
4970 case bp_step_resume
:
4972 case bp_watchpoint_scope
:
4973 case bp_shlib_event
:
4974 case bp_thread_event
:
4975 case bp_overlay_event
:
4981 /* i18n: cagney/2005-02-11: Below needs to be merged into a
4985 printf_filtered (_(" (%s) pending."), b
->addr_string
);
4989 if (opts
.addressprint
|| b
->source_file
== NULL
)
4991 printf_filtered (" at ");
4992 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
4995 printf_filtered (": file %s, line %d.",
4996 b
->source_file
, b
->line_number
);
5000 struct bp_location
*loc
= b
->loc
;
5002 for (; loc
; loc
= loc
->next
)
5004 printf_filtered (" (%d locations)", n
);
5009 if (ui_out_is_mi_like_p (uiout
))
5011 printf_filtered ("\n");
5015 static struct bp_location
*
5016 add_location_to_breakpoint (struct breakpoint
*b
,
5017 const struct symtab_and_line
*sal
)
5019 struct bp_location
*loc
, **tmp
;
5021 loc
= allocate_bp_location (b
);
5022 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5025 loc
->requested_address
= sal
->pc
;
5026 loc
->address
= adjust_breakpoint_address (loc
->requested_address
, b
->type
);
5027 loc
->section
= sal
->section
;
5029 set_breakpoint_location_function (loc
);
5034 /* Return 1 if LOC is pointing to a permanent breakpoint,
5035 return 0 otherwise. */
5038 bp_loc_is_permanent (struct bp_location
*loc
)
5042 const gdb_byte
*brk
;
5043 gdb_byte
*target_mem
;
5044 struct cleanup
*cleanup
;
5047 gdb_assert (loc
!= NULL
);
5049 addr
= loc
->address
;
5050 brk
= gdbarch_breakpoint_from_pc (current_gdbarch
, &addr
, &len
);
5052 /* Software breakpoints unsupported? */
5056 target_mem
= alloca (len
);
5058 /* Enable the automatic memory restoration from breakpoints while
5059 we read the memory. Otherwise we could say about our temporary
5060 breakpoints they are permanent. */
5061 cleanup
= make_show_memory_breakpoints_cleanup (0);
5063 if (target_read_memory (loc
->address
, target_mem
, len
) == 0
5064 && memcmp (target_mem
, brk
, len
) == 0)
5067 do_cleanups (cleanup
);
5074 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5075 as textual description of the location, and COND_STRING
5076 as condition expression. */
5079 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5081 enum bptype type
, enum bpdisp disposition
,
5082 int thread
, int ignore_count
,
5083 struct breakpoint_ops
*ops
, int from_tty
, int enabled
)
5085 struct breakpoint
*b
= NULL
;
5088 if (type
== bp_hardware_breakpoint
)
5090 int i
= hw_breakpoint_used_count ();
5091 int target_resources_ok
=
5092 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5094 if (target_resources_ok
== 0)
5095 error (_("No hardware breakpoint support in the target."));
5096 else if (target_resources_ok
< 0)
5097 error (_("Hardware breakpoints used exceeds limit."));
5100 for (i
= 0; i
< sals
.nelts
; ++i
)
5102 struct symtab_and_line sal
= sals
.sals
[i
];
5103 struct bp_location
*loc
;
5106 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5110 b
= set_raw_breakpoint (sal
, type
);
5111 set_breakpoint_count (breakpoint_count
+ 1);
5112 b
->number
= breakpoint_count
;
5115 b
->cond_string
= cond_string
;
5116 b
->ignore_count
= ignore_count
;
5117 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5118 b
->disposition
= disposition
;
5124 loc
= add_location_to_breakpoint (b
, &sal
);
5127 if (bp_loc_is_permanent (loc
))
5128 make_breakpoint_permanent (b
);
5132 char *arg
= b
->cond_string
;
5133 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5135 error (_("Garbage %s follows condition"), arg
);
5140 b
->addr_string
= addr_string
;
5142 /* addr_string has to be used or breakpoint_re_set will delete
5144 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5150 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5151 elements to fill the void space. */
5152 static void remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5154 int i
= index_to_remove
+1;
5155 int last_index
= sal
->nelts
-1;
5157 for (;i
<= last_index
; ++i
)
5158 sal
->sals
[i
-1] = sal
->sals
[i
];
5163 /* If appropriate, obtains all sals that correspond
5164 to the same file and line as SAL. This is done
5165 only if SAL does not have explicit PC and has
5166 line and file information. If we got just a single
5167 expanded sal, return the original.
5169 Otherwise, if SAL.explicit_line is not set, filter out
5170 all sals for which the name of enclosing function
5171 is different from SAL. This makes sure that if we have
5172 breakpoint originally set in template instantiation, say
5173 foo<int>(), we won't expand SAL to locations at the same
5174 line in all existing instantiations of 'foo'.
5177 struct symtabs_and_lines
5178 expand_line_sal_maybe (struct symtab_and_line sal
)
5180 struct symtabs_and_lines expanded
;
5181 CORE_ADDR original_pc
= sal
.pc
;
5182 char *original_function
= NULL
;
5186 /* If we have explicit pc, don't expand.
5187 If we have no line number, we can't expand. */
5188 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5191 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5192 expanded
.sals
[0] = sal
;
5197 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5199 expanded
= expand_line_sal (sal
);
5200 if (expanded
.nelts
== 1)
5202 /* We had one sal, we got one sal. Without futher
5203 processing, just return the original sal. */
5204 xfree (expanded
.sals
);
5206 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5207 sal
.pc
= original_pc
;
5208 expanded
.sals
[0] = sal
;
5212 if (!sal
.explicit_line
)
5214 CORE_ADDR func_addr
, func_end
;
5215 for (i
= 0; i
< expanded
.nelts
; ++i
)
5217 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5218 char *this_function
;
5219 if (find_pc_partial_function (pc
, &this_function
,
5220 &func_addr
, &func_end
))
5222 if (this_function
&&
5223 strcmp (this_function
, original_function
) != 0)
5225 remove_sal (&expanded
, i
);
5228 else if (func_addr
== pc
)
5230 /* We're at beginning of a function, and should
5232 struct symbol
*sym
= find_pc_function (pc
);
5234 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5237 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5244 if (expanded
.nelts
<= 1)
5246 /* This is un ugly workaround. If we get zero
5247 expanded sals then something is really wrong.
5248 Fix that by returnign the original sal. */
5249 xfree (expanded
.sals
);
5251 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5252 sal
.pc
= original_pc
;
5253 expanded
.sals
[0] = sal
;
5260 for (i
= 0; i
< expanded
.nelts
; ++i
)
5261 if (expanded
.sals
[i
].pc
== original_pc
)
5272 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5273 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5274 value. COND_STRING, if not NULL, specified the condition to be
5275 used for all breakpoints. Essentially the only case where
5276 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5277 function. In that case, it's still not possible to specify
5278 separate conditions for different overloaded functions, so
5279 we take just a single condition string.
5281 NOTE: If the function succeeds, the caller is expected to cleanup
5282 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5283 array contents). If the function fails (error() is called), the
5284 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5285 COND and SALS arrays and each of those arrays contents. */
5288 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5290 enum bptype type
, enum bpdisp disposition
,
5291 int thread
, int ignore_count
,
5292 struct breakpoint_ops
*ops
, int from_tty
,
5296 for (i
= 0; i
< sals
.nelts
; ++i
)
5298 struct symtabs_and_lines expanded
=
5299 expand_line_sal_maybe (sals
.sals
[i
]);
5301 create_breakpoint (expanded
, addr_string
[i
],
5302 cond_string
, type
, disposition
,
5303 thread
, ignore_count
, ops
, from_tty
, enabled
);
5306 update_global_location_list (1);
5309 /* Parse ARG which is assumed to be a SAL specification possibly
5310 followed by conditionals. On return, SALS contains an array of SAL
5311 addresses found. ADDR_STRING contains a vector of (canonical)
5312 address strings. ARG points to the end of the SAL. */
5315 parse_breakpoint_sals (char **address
,
5316 struct symtabs_and_lines
*sals
,
5317 char ***addr_string
,
5320 char *addr_start
= *address
;
5321 *addr_string
= NULL
;
5322 /* If no arg given, or if first arg is 'if ', use the default
5324 if ((*address
) == NULL
5325 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5327 if (default_breakpoint_valid
)
5329 struct symtab_and_line sal
;
5330 init_sal (&sal
); /* initialize to zeroes */
5331 sals
->sals
= (struct symtab_and_line
*)
5332 xmalloc (sizeof (struct symtab_and_line
));
5333 sal
.pc
= default_breakpoint_address
;
5334 sal
.line
= default_breakpoint_line
;
5335 sal
.symtab
= default_breakpoint_symtab
;
5336 sal
.section
= find_pc_overlay (sal
.pc
);
5337 sals
->sals
[0] = sal
;
5341 error (_("No default breakpoint address now."));
5345 /* Force almost all breakpoints to be in terms of the
5346 current_source_symtab (which is decode_line_1's default). This
5347 should produce the results we want almost all of the time while
5348 leaving default_breakpoint_* alone.
5349 ObjC: However, don't match an Objective-C method name which
5350 may have a '+' or '-' succeeded by a '[' */
5352 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5354 if (default_breakpoint_valid
5356 || ((strchr ("+-", (*address
)[0]) != NULL
)
5357 && ((*address
)[1] != '['))))
5358 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5359 default_breakpoint_line
, addr_string
,
5362 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5363 addr_string
, not_found_ptr
);
5365 /* For any SAL that didn't have a canonical string, fill one in. */
5366 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5367 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5368 if (addr_start
!= (*address
))
5371 for (i
= 0; i
< sals
->nelts
; i
++)
5373 /* Add the string if not present. */
5374 if ((*addr_string
)[i
] == NULL
)
5375 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5381 /* Convert each SAL into a real PC. Verify that the PC can be
5382 inserted as a breakpoint. If it can't throw an error. */
5385 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5389 for (i
= 0; i
< sals
->nelts
; i
++)
5390 resolve_sal_pc (&sals
->sals
[i
]);
5394 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5396 struct captured_parse_breakpoint_args
*args
= data
;
5398 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5399 args
->not_found_ptr
);
5402 /* Given TOK, a string specification of condition and thread, as
5403 accepted by the 'break' command, extract the condition
5404 string and thread number and set *COND_STRING and *THREAD.
5405 PC identifies the context at which the condition should be parsed.
5406 If no condition is found, *COND_STRING is set to NULL.
5407 If no thread is found, *THREAD is set to -1. */
5409 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5410 char **cond_string
, int *thread
)
5412 *cond_string
= NULL
;
5418 char *cond_start
= NULL
;
5419 char *cond_end
= NULL
;
5420 while (*tok
== ' ' || *tok
== '\t')
5425 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5428 toklen
= end_tok
- tok
;
5430 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5432 struct expression
*expr
;
5434 tok
= cond_start
= end_tok
+ 1;
5435 expr
= parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5438 *cond_string
= savestring (cond_start
,
5439 cond_end
- cond_start
);
5441 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5447 *thread
= strtol (tok
, &tok
, 0);
5449 error (_("Junk after thread keyword."));
5450 if (!valid_thread_id (*thread
))
5451 error (_("Unknown thread %d."), *thread
);
5454 error (_("Junk at end of arguments."));
5458 /* Set a breakpoint. This function is shared between
5459 CLI and MI functions for setting a breakpoint.
5460 This function has two major modes of operations,
5461 selected by the PARSE_CONDITION_AND_THREAD parameter.
5462 If non-zero, the function will parse arg, extracting
5463 breakpoint location, address and thread. Otherwise,
5464 ARG is just the location of breakpoint, with condition
5465 and thread specified by the COND_STRING and THREAD
5469 break_command_really (char *arg
, char *cond_string
, int thread
,
5470 int parse_condition_and_thread
,
5471 int tempflag
, int hardwareflag
,
5473 enum auto_boolean pending_break_support
,
5474 struct breakpoint_ops
*ops
,
5478 struct gdb_exception e
;
5479 struct symtabs_and_lines sals
;
5480 struct symtab_and_line pending_sal
;
5483 char *addr_start
= arg
;
5485 struct cleanup
*old_chain
;
5486 struct cleanup
*breakpoint_chain
= NULL
;
5487 struct captured_parse_breakpoint_args parse_args
;
5496 parse_args
.arg_p
= &arg
;
5497 parse_args
.sals_p
= &sals
;
5498 parse_args
.addr_string_p
= &addr_string
;
5499 parse_args
.not_found_ptr
= ¬_found
;
5501 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5502 &parse_args
, RETURN_MASK_ALL
);
5504 /* If caller is interested in rc value from parse, set value. */
5508 throw_exception (e
);
5512 case NOT_FOUND_ERROR
:
5514 /* If pending breakpoint support is turned off, throw
5517 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5518 throw_exception (e
);
5520 exception_print (gdb_stderr
, e
);
5522 /* If pending breakpoint support is auto query and the user
5523 selects no, then simply return the error code. */
5524 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5525 !nquery ("Make breakpoint pending on future shared library load? "))
5528 /* At this point, either the user was queried about setting
5529 a pending breakpoint and selected yes, or pending
5530 breakpoint behavior is on and thus a pending breakpoint
5531 is defaulted on behalf of the user. */
5532 copy_arg
= xstrdup (addr_start
);
5533 addr_string
= ©_arg
;
5535 sals
.sals
= &pending_sal
;
5540 throw_exception (e
);
5547 /* Create a chain of things that always need to be cleaned up. */
5548 old_chain
= make_cleanup (null_cleanup
, 0);
5552 /* Make sure that all storage allocated to SALS gets freed. */
5553 make_cleanup (xfree
, sals
.sals
);
5555 /* Cleanup the addr_string array but not its contents. */
5556 make_cleanup (xfree
, addr_string
);
5559 /* ----------------------------- SNIP -----------------------------
5560 Anything added to the cleanup chain beyond this point is assumed
5561 to be part of a breakpoint. If the breakpoint create succeeds
5562 then the memory is not reclaimed. */
5563 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5565 /* Mark the contents of the addr_string for cleanup. These go on
5566 the breakpoint_chain and only occure if the breakpoint create
5568 for (i
= 0; i
< sals
.nelts
; i
++)
5570 if (addr_string
[i
] != NULL
)
5571 make_cleanup (xfree
, addr_string
[i
]);
5574 /* Resolve all line numbers to PC's and verify that the addresses
5575 are ok for the target. */
5577 breakpoint_sals_to_pc (&sals
, addr_start
);
5579 /* Verify that condition can be parsed, before setting any
5580 breakpoints. Allocate a separate condition expression for each
5584 if (parse_condition_and_thread
)
5586 /* Here we only parse 'arg' to separate condition
5587 from thread number, so parsing in context of first
5588 sal is OK. When setting the breakpoint we'll
5589 re-parse it in context of each sal. */
5592 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5594 make_cleanup (xfree
, cond_string
);
5598 /* Create a private copy of condition string. */
5601 cond_string
= xstrdup (cond_string
);
5602 make_cleanup (xfree
, cond_string
);
5605 create_breakpoints (sals
, addr_string
, cond_string
,
5606 hardwareflag
? bp_hardware_breakpoint
5608 tempflag
? disp_del
: disp_donttouch
,
5609 thread
, ignore_count
, ops
, from_tty
, enabled
);
5613 struct symtab_and_line sal
= {0};
5614 struct breakpoint
*b
;
5616 make_cleanup (xfree
, copy_arg
);
5618 b
= set_raw_breakpoint_without_location (hardwareflag
5619 ? bp_hardware_breakpoint
5621 set_breakpoint_count (breakpoint_count
+ 1);
5622 b
->number
= breakpoint_count
;
5624 b
->addr_string
= addr_string
[0];
5625 b
->cond_string
= NULL
;
5626 b
->ignore_count
= ignore_count
;
5627 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5628 b
->condition_not_parsed
= 1;
5630 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5632 update_global_location_list (1);
5637 warning (_("Multiple breakpoints were set.\n"
5638 "Use the \"delete\" command to delete unwanted breakpoints."));
5639 /* That's it. Discard the cleanups for data inserted into the
5641 discard_cleanups (breakpoint_chain
);
5642 /* But cleanup everything else. */
5643 do_cleanups (old_chain
);
5646 /* Set a breakpoint.
5647 ARG is a string describing breakpoint address,
5648 condition, and thread.
5649 FLAG specifies if a breakpoint is hardware on,
5650 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5654 break_command_1 (char *arg
, int flag
, int from_tty
)
5656 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5657 int tempflag
= flag
& BP_TEMPFLAG
;
5659 break_command_really (arg
,
5660 NULL
, 0, 1 /* parse arg */,
5661 tempflag
, hardwareflag
,
5662 0 /* Ignore count */,
5663 pending_break_support
,
5664 NULL
/* breakpoint_ops */,
5671 set_breakpoint (char *address
, char *condition
,
5672 int hardwareflag
, int tempflag
,
5673 int thread
, int ignore_count
,
5674 int pending
, int enabled
)
5676 break_command_really (address
, condition
, thread
,
5677 0 /* condition and thread are valid. */,
5678 tempflag
, hardwareflag
,
5681 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5685 /* Adjust SAL to the first instruction past the function prologue.
5686 The end of the prologue is determined using the line table from
5687 the debugging information.
5689 If SAL is already past the prologue, then do nothing. */
5692 skip_prologue_sal (struct symtab_and_line
*sal
)
5694 struct symbol
*sym
= find_pc_function (sal
->pc
);
5695 struct symtab_and_line start_sal
;
5700 start_sal
= find_function_start_sal (sym
, 1);
5701 if (sal
->pc
< start_sal
.pc
)
5705 /* Helper function for break_command_1 and disassemble_command. */
5708 resolve_sal_pc (struct symtab_and_line
*sal
)
5712 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5714 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5715 error (_("No line %d in file \"%s\"."),
5716 sal
->line
, sal
->symtab
->filename
);
5719 /* If this SAL corresponds to a breakpoint inserted using
5720 a line number, then skip the function prologue if necessary. */
5721 if (sal
->explicit_line
)
5722 skip_prologue_sal (sal
);
5725 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5727 struct blockvector
*bv
;
5731 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5734 sym
= block_linkage_function (b
);
5737 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5738 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
5742 /* It really is worthwhile to have the section, so we'll just
5743 have to look harder. This case can be executed if we have
5744 line numbers but no functions (as can happen in assembly
5747 struct minimal_symbol
*msym
;
5749 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5751 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
5758 break_command (char *arg
, int from_tty
)
5760 break_command_1 (arg
, 0, from_tty
);
5764 tbreak_command (char *arg
, int from_tty
)
5766 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5770 hbreak_command (char *arg
, int from_tty
)
5772 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5776 thbreak_command (char *arg
, int from_tty
)
5778 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5782 stop_command (char *arg
, int from_tty
)
5784 printf_filtered (_("Specify the type of breakpoint to set.\n\
5785 Usage: stop in <function | address>\n\
5786 stop at <line>\n"));
5790 stopin_command (char *arg
, int from_tty
)
5794 if (arg
== (char *) NULL
)
5796 else if (*arg
!= '*')
5801 /* look for a ':'. If this is a line number specification, then
5802 say it is bad, otherwise, it should be an address or
5803 function/method name */
5804 while (*argptr
&& !hasColon
)
5806 hasColon
= (*argptr
== ':');
5811 badInput
= (*argptr
!= ':'); /* Not a class::method */
5813 badInput
= isdigit (*arg
); /* a simple line number */
5817 printf_filtered (_("Usage: stop in <function | address>\n"));
5819 break_command_1 (arg
, 0, from_tty
);
5823 stopat_command (char *arg
, int from_tty
)
5827 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5834 /* look for a ':'. If there is a '::' then get out, otherwise
5835 it is probably a line number. */
5836 while (*argptr
&& !hasColon
)
5838 hasColon
= (*argptr
== ':');
5843 badInput
= (*argptr
== ':'); /* we have class::method */
5845 badInput
= !isdigit (*arg
); /* not a line number */
5849 printf_filtered (_("Usage: stop at <line>\n"));
5851 break_command_1 (arg
, 0, from_tty
);
5854 /* accessflag: hw_write: watch write,
5855 hw_read: watch read,
5856 hw_access: watch access (read or write) */
5858 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5860 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
5861 struct symtab_and_line sal
;
5862 struct expression
*exp
;
5863 struct block
*exp_valid_block
;
5864 struct value
*val
, *mark
;
5865 struct frame_info
*frame
;
5866 struct frame_info
*prev_frame
= NULL
;
5867 char *exp_start
= NULL
;
5868 char *exp_end
= NULL
;
5869 char *tok
, *id_tok_start
, *end_tok
;
5871 char *cond_start
= NULL
;
5872 char *cond_end
= NULL
;
5873 struct expression
*cond
= NULL
;
5874 int i
, other_type_used
, target_resources_ok
= 0;
5875 enum bptype bp_type
;
5879 init_sal (&sal
); /* initialize to zeroes */
5881 /* Make sure that we actually have parameters to parse. */
5882 if (arg
!= NULL
&& arg
[0] != '\0')
5884 toklen
= strlen (arg
); /* Size of argument list. */
5886 /* Points tok to the end of the argument list. */
5887 tok
= arg
+ toklen
- 1;
5889 /* Go backwards in the parameters list. Skip the last parameter.
5890 If we're expecting a 'thread <thread_num>' parameter, this should
5891 be the thread identifier. */
5892 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5894 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5897 /* Points end_tok to the beginning of the last token. */
5898 id_tok_start
= tok
+ 1;
5900 /* Go backwards in the parameters list. Skip one more parameter.
5901 If we're expecting a 'thread <thread_num>' parameter, we should
5902 reach a "thread" token. */
5903 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5908 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5911 /* Move the pointer forward to skip the whitespace and
5912 calculate the length of the token. */
5914 toklen
= end_tok
- tok
;
5916 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5918 /* At this point we've found a "thread" token, which means
5919 the user is trying to set a watchpoint that triggers
5920 only in a specific thread. */
5923 /* Extract the thread ID from the next token. */
5924 thread
= strtol (id_tok_start
, &endp
, 0);
5926 /* Check if the user provided a valid numeric value for the
5928 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
5929 error (_("Invalid thread ID specification %s."), id_tok_start
);
5931 /* Check if the thread actually exists. */
5932 if (!valid_thread_id (thread
))
5933 error (_("Unknown thread %d."), thread
);
5935 /* Truncate the string and get rid of the thread <thread_num>
5936 parameter before the parameter list is parsed by the
5937 evaluate_expression() function. */
5942 /* Parse the rest of the arguments. */
5943 innermost_block
= NULL
;
5945 exp
= parse_exp_1 (&arg
, 0, 0);
5947 /* Remove trailing whitespace from the expression before saving it.
5948 This makes the eventual display of the expression string a bit
5950 while (exp_end
> exp_start
&& (exp_end
[-1] == ' ' || exp_end
[-1] == '\t'))
5953 exp_valid_block
= innermost_block
;
5954 mark
= value_mark ();
5955 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
5957 release_value (val
);
5960 while (*tok
== ' ' || *tok
== '\t')
5964 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5967 toklen
= end_tok
- tok
;
5968 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5970 tok
= cond_start
= end_tok
+ 1;
5971 cond
= parse_exp_1 (&tok
, 0, 0);
5975 error (_("Junk at end of command."));
5977 if (accessflag
== hw_read
)
5978 bp_type
= bp_read_watchpoint
;
5979 else if (accessflag
== hw_access
)
5980 bp_type
= bp_access_watchpoint
;
5982 bp_type
= bp_hardware_watchpoint
;
5984 mem_cnt
= can_use_hardware_watchpoint (val
);
5985 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5986 error (_("Expression cannot be implemented with read/access watchpoint."));
5989 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5990 target_resources_ok
=
5991 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5993 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5994 error (_("Target does not support this type of hardware watchpoint."));
5996 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5997 error (_("Target can only support one kind of HW watchpoint at a time."));
6000 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
6001 watchpoint could not be set. */
6002 if (!mem_cnt
|| target_resources_ok
<= 0)
6003 bp_type
= bp_watchpoint
;
6005 frame
= block_innermost_frame (exp_valid_block
);
6007 prev_frame
= get_prev_frame (frame
);
6011 /* If the expression is "local", then set up a "watchpoint scope"
6012 breakpoint at the point where we've left the scope of the watchpoint
6013 expression. Create the scope breakpoint before the watchpoint, so
6014 that we will encounter it first in bpstat_stop_status. */
6015 if (innermost_block
&& prev_frame
)
6017 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
6018 bp_watchpoint_scope
);
6020 scope_breakpoint
->enable_state
= bp_enabled
;
6022 /* Automatically delete the breakpoint when it hits. */
6023 scope_breakpoint
->disposition
= disp_del
;
6025 /* Only break in the proper frame (help with recursion). */
6026 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
6028 /* Set the address at which we will stop. */
6029 scope_breakpoint
->loc
->requested_address
6030 = get_frame_pc (prev_frame
);
6031 scope_breakpoint
->loc
->address
6032 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
6033 scope_breakpoint
->type
);
6036 /* Now set up the breakpoint. */
6037 b
= set_raw_breakpoint (sal
, bp_type
);
6038 set_breakpoint_count (breakpoint_count
+ 1);
6039 b
->number
= breakpoint_count
;
6041 b
->disposition
= disp_donttouch
;
6043 b
->exp_valid_block
= exp_valid_block
;
6044 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6047 b
->loc
->cond
= cond
;
6049 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6054 b
->watchpoint_frame
= get_frame_id (frame
);
6056 b
->watchpoint_frame
= null_frame_id
;
6058 if (scope_breakpoint
!= NULL
)
6060 /* The scope breakpoint is related to the watchpoint. We will
6061 need to act on them together. */
6062 b
->related_breakpoint
= scope_breakpoint
;
6063 scope_breakpoint
->related_breakpoint
= b
;
6066 value_free_to_mark (mark
);
6068 update_global_location_list (1);
6071 /* Return count of locations need to be watched and can be handled
6072 in hardware. If the watchpoint can not be handled
6073 in hardware return zero. */
6076 can_use_hardware_watchpoint (struct value
*v
)
6078 int found_memory_cnt
= 0;
6079 struct value
*head
= v
;
6081 /* Did the user specifically forbid us to use hardware watchpoints? */
6082 if (!can_use_hw_watchpoints
)
6085 /* Make sure that the value of the expression depends only upon
6086 memory contents, and values computed from them within GDB. If we
6087 find any register references or function calls, we can't use a
6088 hardware watchpoint.
6090 The idea here is that evaluating an expression generates a series
6091 of values, one holding the value of every subexpression. (The
6092 expression a*b+c has five subexpressions: a, b, a*b, c, and
6093 a*b+c.) GDB's values hold almost enough information to establish
6094 the criteria given above --- they identify memory lvalues,
6095 register lvalues, computed values, etcetera. So we can evaluate
6096 the expression, and then scan the chain of values that leaves
6097 behind to decide whether we can detect any possible change to the
6098 expression's final value using only hardware watchpoints.
6100 However, I don't think that the values returned by inferior
6101 function calls are special in any way. So this function may not
6102 notice that an expression involving an inferior function call
6103 can't be watched with hardware watchpoints. FIXME. */
6104 for (; v
; v
= value_next (v
))
6106 if (VALUE_LVAL (v
) == lval_memory
)
6109 /* A lazy memory lvalue is one that GDB never needed to fetch;
6110 we either just used its address (e.g., `a' in `a.b') or
6111 we never needed it at all (e.g., `a' in `a,b'). */
6115 /* Ahh, memory we actually used! Check if we can cover
6116 it with hardware watchpoints. */
6117 struct type
*vtype
= check_typedef (value_type (v
));
6119 /* We only watch structs and arrays if user asked for it
6120 explicitly, never if they just happen to appear in a
6121 middle of some value chain. */
6123 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6124 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6126 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
6127 int len
= TYPE_LENGTH (value_type (v
));
6129 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6136 else if (VALUE_LVAL (v
) != not_lval
6137 && deprecated_value_modifiable (v
) == 0)
6138 return 0; /* ??? What does this represent? */
6139 else if (VALUE_LVAL (v
) == lval_register
)
6140 return 0; /* cannot watch a register with a HW watchpoint */
6143 /* The expression itself looks suitable for using a hardware
6144 watchpoint, but give the target machine a chance to reject it. */
6145 return found_memory_cnt
;
6149 watch_command_wrapper (char *arg
, int from_tty
)
6151 watch_command (arg
, from_tty
);
6155 watch_command (char *arg
, int from_tty
)
6157 watch_command_1 (arg
, hw_write
, from_tty
);
6161 rwatch_command_wrapper (char *arg
, int from_tty
)
6163 rwatch_command (arg
, from_tty
);
6167 rwatch_command (char *arg
, int from_tty
)
6169 watch_command_1 (arg
, hw_read
, from_tty
);
6173 awatch_command_wrapper (char *arg
, int from_tty
)
6175 awatch_command (arg
, from_tty
);
6179 awatch_command (char *arg
, int from_tty
)
6181 watch_command_1 (arg
, hw_access
, from_tty
);
6185 /* Helper routines for the until_command routine in infcmd.c. Here
6186 because it uses the mechanisms of breakpoints. */
6188 struct until_break_command_continuation_args
6190 struct breakpoint
*breakpoint
;
6191 struct breakpoint
*breakpoint2
;
6194 /* This function is called by fetch_inferior_event via the
6195 cmd_continuation pointer, to complete the until command. It takes
6196 care of cleaning up the temporary breakpoints set up by the until
6199 until_break_command_continuation (void *arg
)
6201 struct until_break_command_continuation_args
*a
= arg
;
6203 delete_breakpoint (a
->breakpoint
);
6205 delete_breakpoint (a
->breakpoint2
);
6209 until_break_command (char *arg
, int from_tty
, int anywhere
)
6211 struct symtabs_and_lines sals
;
6212 struct symtab_and_line sal
;
6213 struct frame_info
*frame
= get_selected_frame (NULL
);
6214 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6215 struct breakpoint
*breakpoint
;
6216 struct breakpoint
*breakpoint2
= NULL
;
6217 struct cleanup
*old_chain
;
6219 clear_proceed_status ();
6221 /* Set a breakpoint where the user wants it and at return from
6224 if (default_breakpoint_valid
)
6225 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6226 default_breakpoint_line
, (char ***) NULL
, NULL
);
6228 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6229 0, (char ***) NULL
, NULL
);
6231 if (sals
.nelts
!= 1)
6232 error (_("Couldn't get information on specified line."));
6235 xfree (sals
.sals
); /* malloc'd, so freed */
6238 error (_("Junk at end of arguments."));
6240 resolve_sal_pc (&sal
);
6243 /* If the user told us to continue until a specified location,
6244 we don't specify a frame at which we need to stop. */
6245 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6247 /* Otherwise, specify the current frame, because we want to stop only
6248 at the very same frame. */
6249 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6252 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6254 /* Keep within the current frame, or in frames called by the current
6258 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6259 sal
.pc
= get_frame_pc (prev_frame
);
6260 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6262 make_cleanup_delete_breakpoint (breakpoint2
);
6265 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6267 /* If we are running asynchronously, and proceed call above has actually
6268 managed to start the target, arrange for breakpoints to be
6269 deleted when the target stops. Otherwise, we're already stopped and
6270 delete breakpoints via cleanup chain. */
6272 if (target_can_async_p () && is_running (inferior_ptid
))
6274 struct until_break_command_continuation_args
*args
;
6275 args
= xmalloc (sizeof (*args
));
6277 args
->breakpoint
= breakpoint
;
6278 args
->breakpoint2
= breakpoint2
;
6280 discard_cleanups (old_chain
);
6281 add_continuation (inferior_thread (),
6282 until_break_command_continuation
, args
,
6286 do_cleanups (old_chain
);
6290 ep_skip_leading_whitespace (char **s
)
6292 if ((s
== NULL
) || (*s
== NULL
))
6294 while (isspace (**s
))
6298 /* This function attempts to parse an optional "if <cond>" clause
6299 from the arg string. If one is not found, it returns NULL.
6301 Else, it returns a pointer to the condition string. (It does not
6302 attempt to evaluate the string against a particular block.) And,
6303 it updates arg to point to the first character following the parsed
6304 if clause in the arg string. */
6307 ep_parse_optional_if_clause (char **arg
)
6311 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6314 /* Skip the "if" keyword. */
6317 /* Skip any extra leading whitespace, and record the start of the
6318 condition string. */
6319 ep_skip_leading_whitespace (arg
);
6322 /* Assume that the condition occupies the remainder of the arg string. */
6323 (*arg
) += strlen (cond_string
);
6328 /* This function attempts to parse an optional filename from the arg
6329 string. If one is not found, it returns NULL.
6331 Else, it returns a pointer to the parsed filename. (This function
6332 makes no attempt to verify that a file of that name exists, or is
6333 accessible.) And, it updates arg to point to the first character
6334 following the parsed filename in the arg string.
6336 Note that clients needing to preserve the returned filename for
6337 future access should copy it to their own buffers. */
6339 ep_parse_optional_filename (char **arg
)
6341 static char filename
[1024];
6346 if ((*arg_p
== '\0') || isspace (*arg_p
))
6364 /* Commands to deal with catching events, such as signals, exceptions,
6365 process start/exit, etc. */
6369 catch_fork_temporary
, catch_vfork_temporary
,
6370 catch_fork_permanent
, catch_vfork_permanent
6375 catch_fork_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6377 char *cond_string
= NULL
;
6378 catch_fork_kind fork_kind
;
6381 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
6382 tempflag
= (fork_kind
== catch_fork_temporary
6383 || fork_kind
== catch_vfork_temporary
);
6387 ep_skip_leading_whitespace (&arg
);
6389 /* The allowed syntax is:
6391 catch [v]fork if <cond>
6393 First, check if there's an if clause. */
6394 cond_string
= ep_parse_optional_if_clause (&arg
);
6396 if ((*arg
!= '\0') && !isspace (*arg
))
6397 error (_("Junk at end of arguments."));
6399 /* If this target supports it, create a fork or vfork catchpoint
6400 and enable reporting of such events. */
6403 case catch_fork_temporary
:
6404 case catch_fork_permanent
:
6405 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6406 &catch_fork_breakpoint_ops
);
6408 case catch_vfork_temporary
:
6409 case catch_vfork_permanent
:
6410 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6411 &catch_vfork_breakpoint_ops
);
6414 error (_("unsupported or unknown fork kind; cannot catch it"));
6420 catch_exec_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6423 char *cond_string
= NULL
;
6425 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6429 ep_skip_leading_whitespace (&arg
);
6431 /* The allowed syntax is:
6433 catch exec if <cond>
6435 First, check if there's an if clause. */
6436 cond_string
= ep_parse_optional_if_clause (&arg
);
6438 if ((*arg
!= '\0') && !isspace (*arg
))
6439 error (_("Junk at end of arguments."));
6441 /* If this target supports it, create an exec catchpoint
6442 and enable reporting of such events. */
6443 create_catchpoint (tempflag
, cond_string
, &catch_exec_breakpoint_ops
);
6446 static enum print_stop_action
6447 print_exception_catchpoint (struct breakpoint
*b
)
6449 int bp_temp
, bp_throw
;
6451 annotate_catchpoint (b
->number
);
6453 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6454 if (b
->loc
->address
!= b
->loc
->requested_address
)
6455 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6458 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6460 bp_temp
? "Temporary catchpoint "
6462 if (!ui_out_is_mi_like_p (uiout
))
6463 ui_out_field_int (uiout
, "bkptno", b
->number
);
6465 bp_throw
? " (exception thrown), "
6466 : " (exception caught), ");
6467 if (ui_out_is_mi_like_p (uiout
))
6469 ui_out_field_string (uiout
, "reason",
6470 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6471 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6472 ui_out_field_int (uiout
, "bkptno", b
->number
);
6474 return PRINT_SRC_AND_LOC
;
6478 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6480 struct value_print_options opts
;
6481 get_user_print_options (&opts
);
6482 if (opts
.addressprint
)
6485 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6486 ui_out_field_string (uiout
, "addr", "<PENDING>");
6488 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6492 *last_addr
= b
->loc
->address
;
6493 if (strstr (b
->addr_string
, "throw") != NULL
)
6494 ui_out_field_string (uiout
, "what", "exception throw");
6496 ui_out_field_string (uiout
, "what", "exception catch");
6500 print_mention_exception_catchpoint (struct breakpoint
*b
)
6505 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6506 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6507 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6508 : _("Catchpoint "));
6509 ui_out_field_int (uiout
, "bkptno", b
->number
);
6510 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6514 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6517 NULL
, /* breakpoint_hit */
6518 print_exception_catchpoint
,
6519 print_one_exception_catchpoint
,
6520 print_mention_exception_catchpoint
6524 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6525 enum exception_event_kind ex_event
, int from_tty
)
6527 char *trigger_func_name
;
6529 if (ex_event
== EX_EVENT_CATCH
)
6530 trigger_func_name
= "__cxa_begin_catch";
6532 trigger_func_name
= "__cxa_throw";
6534 break_command_really (trigger_func_name
, cond_string
, -1,
6535 0 /* condition and thread are valid. */,
6538 AUTO_BOOLEAN_TRUE
/* pending */,
6539 &gnu_v3_exception_catchpoint_ops
, from_tty
,
6545 /* Deal with "catch catch" and "catch throw" commands */
6548 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6549 int tempflag
, int from_tty
)
6551 char *cond_string
= NULL
;
6552 struct symtab_and_line
*sal
= NULL
;
6556 ep_skip_leading_whitespace (&arg
);
6558 cond_string
= ep_parse_optional_if_clause (&arg
);
6560 if ((*arg
!= '\0') && !isspace (*arg
))
6561 error (_("Junk at end of arguments."));
6563 if ((ex_event
!= EX_EVENT_THROW
) &&
6564 (ex_event
!= EX_EVENT_CATCH
))
6565 error (_("Unsupported or unknown exception event; cannot catch it"));
6567 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6570 warning (_("Unsupported with this platform/compiler combination."));
6573 /* Implementation of "catch catch" command. */
6576 catch_catch_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6578 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6579 catch_exception_command_1 (EX_EVENT_CATCH
, arg
, tempflag
, from_tty
);
6582 /* Implementation of "catch throw" command. */
6585 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6587 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6588 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
6591 /* Create a breakpoint struct for Ada exception catchpoints. */
6594 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6598 struct expression
*cond
,
6599 struct breakpoint_ops
*ops
,
6603 struct breakpoint
*b
;
6607 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6608 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6609 version for exception catchpoints, because two catchpoints
6610 used for different exception names will use the same address.
6611 In this case, a "breakpoint ... also set at..." warning is
6612 unproductive. Besides. the warning phrasing is also a bit
6613 inapropriate, we should use the word catchpoint, and tell
6614 the user what type of catchpoint it is. The above is good
6615 enough for now, though. */
6618 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6619 set_breakpoint_count (breakpoint_count
+ 1);
6621 b
->enable_state
= bp_enabled
;
6622 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6623 b
->number
= breakpoint_count
;
6624 b
->ignore_count
= 0;
6625 b
->loc
->cond
= cond
;
6626 b
->addr_string
= addr_string
;
6627 b
->language
= language_ada
;
6628 b
->cond_string
= cond_string
;
6629 b
->exp_string
= exp_string
;
6634 update_global_location_list (1);
6637 /* Implement the "catch exception" command. */
6640 catch_ada_exception_command (char *arg
, int from_tty
,
6641 struct cmd_list_element
*command
)
6644 struct symtab_and_line sal
;
6646 char *addr_string
= NULL
;
6647 char *exp_string
= NULL
;
6648 char *cond_string
= NULL
;
6649 struct expression
*cond
= NULL
;
6650 struct breakpoint_ops
*ops
= NULL
;
6652 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6656 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6657 &cond_string
, &cond
, &ops
);
6658 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6659 cond_string
, cond
, ops
, tempflag
,
6663 /* Implement the "catch assert" command. */
6666 catch_assert_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6669 struct symtab_and_line sal
;
6670 char *addr_string
= NULL
;
6671 struct breakpoint_ops
*ops
= NULL
;
6673 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6677 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6678 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6679 tempflag
, from_tty
);
6683 catch_command (char *arg
, int from_tty
)
6685 error (_("Catch requires an event name."));
6690 tcatch_command (char *arg
, int from_tty
)
6692 error (_("Catch requires an event name."));
6695 /* Delete breakpoints by address or line. */
6698 clear_command (char *arg
, int from_tty
)
6700 struct breakpoint
*b
;
6701 VEC(breakpoint_p
) *found
= 0;
6704 struct symtabs_and_lines sals
;
6705 struct symtab_and_line sal
;
6710 sals
= decode_line_spec (arg
, 1);
6715 sals
.sals
= (struct symtab_and_line
*)
6716 xmalloc (sizeof (struct symtab_and_line
));
6717 make_cleanup (xfree
, sals
.sals
);
6718 init_sal (&sal
); /* initialize to zeroes */
6719 sal
.line
= default_breakpoint_line
;
6720 sal
.symtab
= default_breakpoint_symtab
;
6721 sal
.pc
= default_breakpoint_address
;
6722 if (sal
.symtab
== 0)
6723 error (_("No source file specified."));
6731 /* We don't call resolve_sal_pc here. That's not
6732 as bad as it seems, because all existing breakpoints
6733 typically have both file/line and pc set. So, if
6734 clear is given file/line, we can match this to existing
6735 breakpoint without obtaining pc at all.
6737 We only support clearing given the address explicitly
6738 present in breakpoint table. Say, we've set breakpoint
6739 at file:line. There were several PC values for that file:line,
6740 due to optimization, all in one block.
6741 We've picked one PC value. If "clear" is issued with another
6742 PC corresponding to the same file:line, the breakpoint won't
6743 be cleared. We probably can still clear the breakpoint, but
6744 since the other PC value is never presented to user, user
6745 can only find it by guessing, and it does not seem important
6748 /* For each line spec given, delete bps which correspond
6749 to it. Do it in two passes, solely to preserve the current
6750 behavior that from_tty is forced true if we delete more than
6754 for (i
= 0; i
< sals
.nelts
; i
++)
6756 /* If exact pc given, clear bpts at that pc.
6757 If line given (pc == 0), clear all bpts on specified line.
6758 If defaulting, clear all bpts on default line
6761 defaulting sal.pc != 0 tests to do
6766 1 0 <can't happen> */
6770 /* Find all matching breakpoints and add them to
6775 /* Are we going to delete b? */
6776 if (b
->type
!= bp_none
6777 && b
->type
!= bp_watchpoint
6778 && b
->type
!= bp_hardware_watchpoint
6779 && b
->type
!= bp_read_watchpoint
6780 && b
->type
!= bp_access_watchpoint
)
6782 struct bp_location
*loc
= b
->loc
;
6783 for (; loc
; loc
= loc
->next
)
6785 int pc_match
= sal
.pc
6786 && (loc
->address
== sal
.pc
)
6787 && (!section_is_overlay (loc
->section
)
6788 || loc
->section
== sal
.section
);
6789 int line_match
= ((default_match
|| (0 == sal
.pc
))
6790 && b
->source_file
!= NULL
6791 && sal
.symtab
!= NULL
6792 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6793 && b
->line_number
== sal
.line
);
6794 if (pc_match
|| line_match
)
6803 VEC_safe_push(breakpoint_p
, found
, b
);
6806 /* Now go thru the 'found' chain and delete them. */
6807 if (VEC_empty(breakpoint_p
, found
))
6810 error (_("No breakpoint at %s."), arg
);
6812 error (_("No breakpoint at this line."));
6815 if (VEC_length(breakpoint_p
, found
) > 1)
6816 from_tty
= 1; /* Always report if deleted more than one */
6819 if (VEC_length(breakpoint_p
, found
) == 1)
6820 printf_unfiltered (_("Deleted breakpoint "));
6822 printf_unfiltered (_("Deleted breakpoints "));
6824 breakpoints_changed ();
6826 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6829 printf_unfiltered ("%d ", b
->number
);
6830 delete_breakpoint (b
);
6833 putchar_unfiltered ('\n');
6836 /* Delete breakpoint in BS if they are `delete' breakpoints and
6837 all breakpoints that are marked for deletion, whether hit or not.
6838 This is called after any breakpoint is hit, or after errors. */
6841 breakpoint_auto_delete (bpstat bs
)
6843 struct breakpoint
*b
, *temp
;
6845 for (; bs
; bs
= bs
->next
)
6846 if (bs
->breakpoint_at
6847 && bs
->breakpoint_at
->owner
6848 && bs
->breakpoint_at
->owner
->disposition
== disp_del
6850 delete_breakpoint (bs
->breakpoint_at
->owner
);
6852 ALL_BREAKPOINTS_SAFE (b
, temp
)
6854 if (b
->disposition
== disp_del_at_next_stop
)
6855 delete_breakpoint (b
);
6859 /* A cleanup function which destroys a vector. */
6862 do_vec_free (void *p
)
6864 VEC(bp_location_p
) **vec
= p
;
6866 VEC_free (bp_location_p
, *vec
);
6869 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
6870 into the inferior, only remove already-inserted locations that no
6871 longer should be inserted. Functions that delete a breakpoint or
6872 breakpoints should pass false, so that deleting a breakpoint
6873 doesn't have the side effect of inserting the locations of other
6874 breakpoints that are marked not-inserted, but should_be_inserted
6875 returns true on them.
6877 This behaviour is useful is situations close to tear-down -- e.g.,
6878 after an exec, while the target still has execution, but breakpoint
6879 shadows of the previous executable image should *NOT* be restored
6880 to the new image; or before detaching, where the target still has
6881 execution and wants to delete breakpoints from GDB's lists, and all
6882 breakpoints had already been removed from the inferior. */
6885 update_global_location_list (int should_insert
)
6887 struct breakpoint
*b
;
6888 struct bp_location
**next
= &bp_location_chain
;
6889 struct bp_location
*loc
;
6890 struct bp_location
*loc2
;
6891 VEC(bp_location_p
) *old_locations
= NULL
;
6894 struct cleanup
*cleanups
;
6896 cleanups
= make_cleanup (do_vec_free
, &old_locations
);
6897 /* Store old locations for future reference. */
6898 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
6899 VEC_safe_push (bp_location_p
, old_locations
, loc
);
6901 bp_location_chain
= NULL
;
6904 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
6907 next
= &(loc
->global_next
);
6912 /* Identify bp_location instances that are no longer present in the new
6913 list, and therefore should be freed. Note that it's not necessary that
6914 those locations should be removed from inferior -- if there's another
6915 location at the same address (previously marked as duplicate),
6916 we don't need to remove/insert the location. */
6917 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
6919 /* Tells if 'loc' is found amoung the new locations. If not, we
6921 int found_object
= 0;
6922 /* Tells if the location should remain inserted in the target. */
6923 int keep_in_target
= 0;
6925 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
6932 /* If this location is no longer present, and inserted, look if there's
6933 maybe a new location at the same address. If so, mark that one
6934 inserted, and don't remove this one. This is needed so that we
6935 don't have a time window where a breakpoint at certain location is not
6940 /* If the location is inserted now, we might have to remove it. */
6942 if (found_object
&& should_be_inserted (loc
))
6944 /* The location is still present in the location list, and still
6945 should be inserted. Don't do anything. */
6950 /* The location is either no longer present, or got disabled.
6951 See if there's another location at the same address, in which
6952 case we don't need to remove this one from the target. */
6953 if (breakpoint_address_is_meaningful (loc
->owner
))
6954 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
6956 /* For the sake of should_insert_location. The
6957 call to check_duplicates will fix up this later. */
6958 loc2
->duplicate
= 0;
6959 if (should_be_inserted (loc2
)
6960 && loc2
!= loc
&& loc2
->address
== loc
->address
)
6963 loc2
->target_info
= loc
->target_info
;
6970 if (!keep_in_target
)
6972 if (remove_breakpoint (loc
, mark_uninserted
))
6974 /* This is just about all we can do. We could keep this
6975 location on the global list, and try to remove it next
6976 time, but there's no particular reason why we will
6979 Note that at this point, loc->owner is still valid,
6980 as delete_breakpoint frees the breakpoint only
6981 after calling us. */
6982 printf_filtered (_("warning: Error removing breakpoint %d\n"),
6983 loc
->owner
->number
);
6991 if (removed
&& non_stop
)
6993 /* This location was removed from the targets. In non-stop mode,
6994 a race condition is possible where we've removed a breakpoint,
6995 but stop events for that breakpoint are already queued and will
6996 arrive later. To suppress spurious SIGTRAPs reported to user,
6997 we keep this breakpoint location for a bit, and will retire it
6998 after we see 3 * thread_count events.
6999 The theory here is that reporting of events should,
7000 "on the average", be fair, so after that many event we'll see
7001 events from all threads that have anything of interest, and no
7002 longer need to keep this breakpoint. This is just a
7003 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7004 which is usability issue, but not a correctness problem. */
7005 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7008 VEC_safe_push (bp_location_p
, moribund_locations
, loc
);
7011 free_bp_location (loc
);
7017 check_duplicates (b
);
7020 if (breakpoints_always_inserted_mode () && should_insert
7021 && (target_has_execution
7022 || (gdbarch_has_global_solist (target_gdbarch
)
7023 && target_supports_multi_process ())))
7024 insert_breakpoint_locations ();
7026 do_cleanups (cleanups
);
7030 breakpoint_retire_moribund (void)
7032 struct bp_location
*loc
;
7035 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7036 if (--(loc
->events_till_retirement
) == 0)
7038 free_bp_location (loc
);
7039 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7045 update_global_location_list_nothrow (int inserting
)
7047 struct gdb_exception e
;
7048 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7049 update_global_location_list (inserting
);
7052 /* Clear BPT from a BPS. */
7054 bpstat_remove_breakpoint (bpstat bps
, struct breakpoint
*bpt
)
7057 for (bs
= bps
; bs
; bs
= bs
->next
)
7058 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7060 bs
->breakpoint_at
= NULL
;
7062 /* bs->commands will be freed later. */
7066 /* Callback for iterate_over_threads. */
7068 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
7070 struct breakpoint
*bpt
= data
;
7071 bpstat_remove_breakpoint (th
->stop_bpstat
, bpt
);
7075 /* Delete a breakpoint and clean up all traces of it in the data
7079 delete_breakpoint (struct breakpoint
*bpt
)
7081 struct breakpoint
*b
;
7082 struct bp_location
*loc
, *next
;
7084 gdb_assert (bpt
!= NULL
);
7086 /* Has this bp already been deleted? This can happen because multiple
7087 lists can hold pointers to bp's. bpstat lists are especial culprits.
7089 One example of this happening is a watchpoint's scope bp. When the
7090 scope bp triggers, we notice that the watchpoint is out of scope, and
7091 delete it. We also delete its scope bp. But the scope bp is marked
7092 "auto-deleting", and is already on a bpstat. That bpstat is then
7093 checked for auto-deleting bp's, which are deleted.
7095 A real solution to this problem might involve reference counts in bp's,
7096 and/or giving them pointers back to their referencing bpstat's, and
7097 teaching delete_breakpoint to only free a bp's storage when no more
7098 references were extent. A cheaper bandaid was chosen. */
7099 if (bpt
->type
== bp_none
)
7102 observer_notify_breakpoint_deleted (bpt
->number
);
7104 if (breakpoint_chain
== bpt
)
7105 breakpoint_chain
= bpt
->next
;
7110 b
->next
= bpt
->next
;
7114 free_command_lines (&bpt
->commands
);
7115 if (bpt
->cond_string
!= NULL
)
7116 xfree (bpt
->cond_string
);
7117 if (bpt
->addr_string
!= NULL
)
7118 xfree (bpt
->addr_string
);
7119 if (bpt
->exp
!= NULL
)
7121 if (bpt
->exp_string
!= NULL
)
7122 xfree (bpt
->exp_string
);
7123 if (bpt
->val
!= NULL
)
7124 value_free (bpt
->val
);
7125 if (bpt
->source_file
!= NULL
)
7126 xfree (bpt
->source_file
);
7127 if (bpt
->exec_pathname
!= NULL
)
7128 xfree (bpt
->exec_pathname
);
7130 /* Be sure no bpstat's are pointing at it after it's been freed. */
7131 /* FIXME, how can we find all bpstat's?
7132 We just check stop_bpstat for now. Note that we cannot just
7133 remove bpstats pointing at bpt from the stop_bpstat list
7134 entirely, as breakpoint commands are associated with the bpstat;
7135 if we remove it here, then the later call to
7136 bpstat_do_actions (&stop_bpstat);
7137 in event-top.c won't do anything, and temporary breakpoints
7138 with commands won't work. */
7140 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
7142 /* Now that breakpoint is removed from breakpoint
7143 list, update the global location list. This
7144 will remove locations that used to belong to
7145 this breakpoint. Do this before freeing
7146 the breakpoint itself, since remove_breakpoint
7147 looks at location's owner. It might be better
7148 design to have location completely self-contained,
7149 but it's not the case now. */
7150 update_global_location_list (0);
7153 /* On the chance that someone will soon try again to delete this same
7154 bp, we mark it as deleted before freeing its storage. */
7155 bpt
->type
= bp_none
;
7161 do_delete_breakpoint_cleanup (void *b
)
7163 delete_breakpoint (b
);
7167 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7169 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7173 delete_command (char *arg
, int from_tty
)
7175 struct breakpoint
*b
, *temp
;
7181 int breaks_to_delete
= 0;
7183 /* Delete all breakpoints if no argument.
7184 Do not delete internal or call-dummy breakpoints, these
7185 have to be deleted with an explicit breakpoint number argument. */
7188 if (b
->type
!= bp_call_dummy
&&
7189 b
->type
!= bp_shlib_event
&&
7190 b
->type
!= bp_thread_event
&&
7191 b
->type
!= bp_overlay_event
&&
7194 breaks_to_delete
= 1;
7199 /* Ask user only if there are some breakpoints to delete. */
7201 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7203 ALL_BREAKPOINTS_SAFE (b
, temp
)
7205 if (b
->type
!= bp_call_dummy
&&
7206 b
->type
!= bp_shlib_event
&&
7207 b
->type
!= bp_thread_event
&&
7208 b
->type
!= bp_overlay_event
&&
7210 delete_breakpoint (b
);
7215 map_breakpoint_numbers (arg
, delete_breakpoint
);
7219 all_locations_are_pending (struct bp_location
*loc
)
7221 for (; loc
; loc
= loc
->next
)
7222 if (!loc
->shlib_disabled
)
7227 /* Subroutine of update_breakpoint_locations to simplify it.
7228 Return non-zero if multiple fns in list LOC have the same name.
7229 Null names are ignored. */
7232 ambiguous_names_p (struct bp_location
*loc
)
7234 struct bp_location
*l
;
7235 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7236 (int (*) (const void *, const void *)) streq
,
7237 NULL
, xcalloc
, xfree
);
7239 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7242 const char *name
= l
->function_name
;
7244 /* Allow for some names to be NULL, ignore them. */
7248 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7250 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7265 update_breakpoint_locations (struct breakpoint
*b
,
7266 struct symtabs_and_lines sals
)
7270 struct bp_location
*existing_locations
= b
->loc
;
7272 /* If there's no new locations, and all existing locations
7273 are pending, don't do anything. This optimizes
7274 the common case where all locations are in the same
7275 shared library, that was unloaded. We'd like to
7276 retain the location, so that when the library
7277 is loaded again, we don't loose the enabled/disabled
7278 status of the individual locations. */
7279 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7284 for (i
= 0; i
< sals
.nelts
; ++i
)
7286 struct bp_location
*new_loc
=
7287 add_location_to_breakpoint (b
, &(sals
.sals
[i
]));
7289 /* Reparse conditions, they might contain references to the
7291 if (b
->cond_string
!= NULL
)
7293 struct gdb_exception e
;
7296 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7298 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7303 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7304 b
->number
, e
.message
);
7305 new_loc
->enabled
= 0;
7309 if (b
->source_file
!= NULL
)
7310 xfree (b
->source_file
);
7311 if (sals
.sals
[i
].symtab
== NULL
)
7312 b
->source_file
= NULL
;
7315 savestring (sals
.sals
[i
].symtab
->filename
,
7316 strlen (sals
.sals
[i
].symtab
->filename
));
7318 if (b
->line_number
== 0)
7319 b
->line_number
= sals
.sals
[i
].line
;
7322 /* Update locations of permanent breakpoints. */
7323 if (b
->enable_state
== bp_permanent
)
7324 make_breakpoint_permanent (b
);
7326 /* If possible, carry over 'disable' status from existing breakpoints. */
7328 struct bp_location
*e
= existing_locations
;
7329 /* If there are multiple breakpoints with the same function name,
7330 e.g. for inline functions, comparing function names won't work.
7331 Instead compare pc addresses; this is just a heuristic as things
7332 may have moved, but in practice it gives the correct answer
7333 often enough until a better solution is found. */
7334 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7336 for (; e
; e
= e
->next
)
7338 if (!e
->enabled
&& e
->function_name
)
7340 struct bp_location
*l
= b
->loc
;
7341 if (have_ambiguous_names
)
7343 for (; l
; l
= l
->next
)
7344 if (e
->address
== l
->address
)
7352 for (; l
; l
= l
->next
)
7353 if (l
->function_name
7354 && strcmp (e
->function_name
, l
->function_name
) == 0)
7364 update_global_location_list (1);
7368 /* Reset a breakpoint given it's struct breakpoint * BINT.
7369 The value we return ends up being the return value from catch_errors.
7370 Unused in this case. */
7373 breakpoint_re_set_one (void *bint
)
7375 /* get past catch_errs */
7376 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7380 int *not_found_ptr
= ¬_found
;
7381 struct symtabs_and_lines sals
= {};
7382 struct symtabs_and_lines expanded
;
7384 enum enable_state save_enable
;
7385 struct gdb_exception e
;
7386 struct cleanup
*cleanups
;
7391 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7395 case bp_hardware_breakpoint
:
7396 if (b
->addr_string
== NULL
)
7398 /* Anything without a string can't be re-set. */
7399 delete_breakpoint (b
);
7403 set_language (b
->language
);
7404 input_radix
= b
->input_radix
;
7406 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7408 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7413 int not_found_and_ok
= 0;
7414 /* For pending breakpoints, it's expected that parsing
7415 will fail until the right shared library is loaded.
7416 User has already told to create pending breakpoints and
7417 don't need extra messages. If breakpoint is in bp_shlib_disabled
7418 state, then user already saw the message about that breakpoint
7419 being disabled, and don't want to see more errors. */
7421 && (b
->condition_not_parsed
7422 || (b
->loc
&& b
->loc
->shlib_disabled
)
7423 || b
->enable_state
== bp_disabled
))
7424 not_found_and_ok
= 1;
7426 if (!not_found_and_ok
)
7428 /* We surely don't want to warn about the same breakpoint
7429 10 times. One solution, implemented here, is disable
7430 the breakpoint on error. Another solution would be to
7431 have separate 'warning emitted' flag. Since this
7432 happens only when a binary has changed, I don't know
7433 which approach is better. */
7434 b
->enable_state
= bp_disabled
;
7435 throw_exception (e
);
7442 gdb_assert (sals
.nelts
== 1);
7443 resolve_sal_pc (&sals
.sals
[0]);
7444 if (b
->condition_not_parsed
&& s
&& s
[0])
7446 char *cond_string
= 0;
7448 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7449 &cond_string
, &thread
);
7451 b
->cond_string
= cond_string
;
7453 b
->condition_not_parsed
= 0;
7455 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7456 cleanups
= make_cleanup (xfree
, sals
.sals
);
7457 update_breakpoint_locations (b
, expanded
);
7458 do_cleanups (cleanups
);
7462 case bp_hardware_watchpoint
:
7463 case bp_read_watchpoint
:
7464 case bp_access_watchpoint
:
7465 /* Watchpoint can be either on expression using entirely global variables,
7466 or it can be on local variables.
7468 Watchpoints of the first kind are never auto-deleted, and even persist
7469 across program restarts. Since they can use variables from shared
7470 libraries, we need to reparse expression as libraries are loaded
7473 Watchpoints on local variables can also change meaning as result
7474 of solib event. For example, if a watchpoint uses both a local and
7475 a global variables in expression, it's a local watchpoint, but
7476 unloading of a shared library will make the expression invalid.
7477 This is not a very common use case, but we still re-evaluate
7478 expression, to avoid surprises to the user.
7480 Note that for local watchpoints, we re-evaluate it only if
7481 watchpoints frame id is still valid. If it's not, it means
7482 the watchpoint is out of scope and will be deleted soon. In fact,
7483 I'm not sure we'll ever be called in this case.
7485 If a local watchpoint's frame id is still valid, then
7486 b->exp_valid_block is likewise valid, and we can safely use it.
7488 Don't do anything about disabled watchpoints, since they will
7489 be reevaluated again when enabled. */
7490 update_watchpoint (b
, 1 /* reparse */);
7492 /* We needn't really do anything to reset these, since the mask
7493 that requests them is unaffected by e.g., new libraries being
7499 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7501 /* Delete overlay event breakpoints; they will be reset later by
7502 breakpoint_re_set. */
7503 case bp_overlay_event
:
7504 delete_breakpoint (b
);
7507 /* This breakpoint is special, it's set up when the inferior
7508 starts and we really don't want to touch it. */
7509 case bp_shlib_event
:
7511 /* Like bp_shlib_event, this breakpoint type is special.
7512 Once it is set up, we do not want to touch it. */
7513 case bp_thread_event
:
7515 /* Keep temporary breakpoints, which can be encountered when we step
7516 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7517 Otherwise these should have been blown away via the cleanup chain
7518 or by breakpoint_init_inferior when we rerun the executable. */
7521 case bp_watchpoint_scope
:
7523 case bp_step_resume
:
7525 case bp_longjmp_resume
:
7532 /* Re-set all breakpoints after symbols have been re-loaded. */
7534 breakpoint_re_set (void)
7536 struct breakpoint
*b
, *temp
;
7537 enum language save_language
;
7538 int save_input_radix
;
7540 save_language
= current_language
->la_language
;
7541 save_input_radix
= input_radix
;
7542 ALL_BREAKPOINTS_SAFE (b
, temp
)
7544 /* Format possible error msg */
7545 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7547 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7548 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7549 do_cleanups (cleanups
);
7551 set_language (save_language
);
7552 input_radix
= save_input_radix
;
7554 create_overlay_event_breakpoint ("_ovly_debug_event");
7557 /* Reset the thread number of this breakpoint:
7559 - If the breakpoint is for all threads, leave it as-is.
7560 - Else, reset it to the current thread for inferior_ptid. */
7562 breakpoint_re_set_thread (struct breakpoint
*b
)
7564 if (b
->thread
!= -1)
7566 if (in_thread_list (inferior_ptid
))
7567 b
->thread
= pid_to_thread_id (inferior_ptid
);
7571 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7572 If from_tty is nonzero, it prints a message to that effect,
7573 which ends with a period (no newline). */
7576 set_ignore_count (int bptnum
, int count
, int from_tty
)
7578 struct breakpoint
*b
;
7584 if (b
->number
== bptnum
)
7586 b
->ignore_count
= count
;
7590 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7592 else if (count
== 1)
7593 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7596 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7599 breakpoints_changed ();
7600 observer_notify_breakpoint_modified (b
->number
);
7604 error (_("No breakpoint number %d."), bptnum
);
7608 make_breakpoint_silent (struct breakpoint
*b
)
7610 /* Silence the breakpoint. */
7614 /* Command to set ignore-count of breakpoint N to COUNT. */
7617 ignore_command (char *args
, int from_tty
)
7623 error_no_arg (_("a breakpoint number"));
7625 num
= get_number (&p
);
7627 error (_("bad breakpoint number: '%s'"), args
);
7629 error (_("Second argument (specified ignore-count) is missing."));
7631 set_ignore_count (num
,
7632 longest_to_int (value_as_long (parse_and_eval (p
))),
7635 printf_filtered ("\n");
7638 /* Call FUNCTION on each of the breakpoints
7639 whose numbers are given in ARGS. */
7642 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7647 struct breakpoint
*b
, *tmp
;
7651 error_no_arg (_("one or more breakpoint numbers"));
7658 num
= get_number_or_range (&p1
);
7661 warning (_("bad breakpoint number at or near '%s'"), p
);
7665 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7666 if (b
->number
== num
)
7668 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7671 if (related_breakpoint
)
7672 function (related_breakpoint
);
7676 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7682 static struct bp_location
*
7683 find_location_by_number (char *number
)
7685 char *dot
= strchr (number
, '.');
7689 struct breakpoint
*b
;
7690 struct bp_location
*loc
;
7695 bp_num
= get_number_or_range (&p1
);
7697 error (_("Bad breakpoint number '%s'"), number
);
7700 if (b
->number
== bp_num
)
7705 if (!b
|| b
->number
!= bp_num
)
7706 error (_("Bad breakpoint number '%s'"), number
);
7709 loc_num
= get_number_or_range (&p1
);
7711 error (_("Bad breakpoint location number '%s'"), number
);
7715 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7718 error (_("Bad breakpoint location number '%s'"), dot
+1);
7724 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7725 If from_tty is nonzero, it prints a message to that effect,
7726 which ends with a period (no newline). */
7729 disable_breakpoint (struct breakpoint
*bpt
)
7731 /* Never disable a watchpoint scope breakpoint; we want to
7732 hit them when we leave scope so we can delete both the
7733 watchpoint and its scope breakpoint at that time. */
7734 if (bpt
->type
== bp_watchpoint_scope
)
7737 /* You can't disable permanent breakpoints. */
7738 if (bpt
->enable_state
== bp_permanent
)
7741 bpt
->enable_state
= bp_disabled
;
7743 update_global_location_list (0);
7745 observer_notify_breakpoint_modified (bpt
->number
);
7749 disable_command (char *args
, int from_tty
)
7751 struct breakpoint
*bpt
;
7753 ALL_BREAKPOINTS (bpt
)
7757 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7762 case bp_hardware_breakpoint
:
7764 case bp_hardware_watchpoint
:
7765 case bp_read_watchpoint
:
7766 case bp_access_watchpoint
:
7767 disable_breakpoint (bpt
);
7771 else if (strchr (args
, '.'))
7773 struct bp_location
*loc
= find_location_by_number (args
);
7776 update_global_location_list (0);
7779 map_breakpoint_numbers (args
, disable_breakpoint
);
7783 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7785 int target_resources_ok
, other_type_used
;
7788 if (bpt
->type
== bp_hardware_breakpoint
)
7791 i
= hw_breakpoint_used_count ();
7792 target_resources_ok
=
7793 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7795 if (target_resources_ok
== 0)
7796 error (_("No hardware breakpoint support in the target."));
7797 else if (target_resources_ok
< 0)
7798 error (_("Hardware breakpoints used exceeds limit."));
7801 if (bpt
->type
== bp_watchpoint
||
7802 bpt
->type
== bp_hardware_watchpoint
||
7803 bpt
->type
== bp_read_watchpoint
||
7804 bpt
->type
== bp_access_watchpoint
)
7806 struct gdb_exception e
;
7808 TRY_CATCH (e
, RETURN_MASK_ALL
)
7810 update_watchpoint (bpt
, 1 /* reparse */);
7814 exception_fprintf (gdb_stderr
, e
, _("Cannot enable watchpoint %d: "),
7820 if (bpt
->enable_state
!= bp_permanent
)
7821 bpt
->enable_state
= bp_enabled
;
7822 bpt
->disposition
= disposition
;
7823 update_global_location_list (1);
7824 breakpoints_changed ();
7826 observer_notify_breakpoint_modified (bpt
->number
);
7831 enable_breakpoint (struct breakpoint
*bpt
)
7833 do_enable_breakpoint (bpt
, bpt
->disposition
);
7836 /* The enable command enables the specified breakpoints (or all defined
7837 breakpoints) so they once again become (or continue to be) effective
7838 in stopping the inferior. */
7841 enable_command (char *args
, int from_tty
)
7843 struct breakpoint
*bpt
;
7845 ALL_BREAKPOINTS (bpt
)
7849 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7854 case bp_hardware_breakpoint
:
7856 case bp_hardware_watchpoint
:
7857 case bp_read_watchpoint
:
7858 case bp_access_watchpoint
:
7859 enable_breakpoint (bpt
);
7863 else if (strchr (args
, '.'))
7865 struct bp_location
*loc
= find_location_by_number (args
);
7868 update_global_location_list (1);
7871 map_breakpoint_numbers (args
, enable_breakpoint
);
7875 enable_once_breakpoint (struct breakpoint
*bpt
)
7877 do_enable_breakpoint (bpt
, disp_disable
);
7881 enable_once_command (char *args
, int from_tty
)
7883 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7887 enable_delete_breakpoint (struct breakpoint
*bpt
)
7889 do_enable_breakpoint (bpt
, disp_del
);
7893 enable_delete_command (char *args
, int from_tty
)
7895 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7899 set_breakpoint_cmd (char *args
, int from_tty
)
7904 show_breakpoint_cmd (char *args
, int from_tty
)
7908 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7910 struct symtabs_and_lines
7911 decode_line_spec_1 (char *string
, int funfirstline
)
7913 struct symtabs_and_lines sals
;
7915 error (_("Empty line specification."));
7916 if (default_breakpoint_valid
)
7917 sals
= decode_line_1 (&string
, funfirstline
,
7918 default_breakpoint_symtab
,
7919 default_breakpoint_line
,
7920 (char ***) NULL
, NULL
);
7922 sals
= decode_line_1 (&string
, funfirstline
,
7923 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7925 error (_("Junk at end of line specification: %s"), string
);
7929 /* Create and insert a raw software breakpoint at PC. Return an
7930 identifier, which should be used to remove the breakpoint later.
7931 In general, places which call this should be using something on the
7932 breakpoint chain instead; this function should be eliminated
7936 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
7938 struct bp_target_info
*bp_tgt
;
7940 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
7941 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
7943 bp_tgt
->placed_address
= pc
;
7944 if (target_insert_breakpoint (bp_tgt
) != 0)
7946 /* Could not insert the breakpoint. */
7954 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
7957 deprecated_remove_raw_breakpoint (void *bp
)
7959 struct bp_target_info
*bp_tgt
= bp
;
7962 ret
= target_remove_breakpoint (bp_tgt
);
7968 /* One (or perhaps two) breakpoints used for software single stepping. */
7970 static void *single_step_breakpoints
[2];
7972 /* Create and insert a breakpoint for software single step. */
7975 insert_single_step_breakpoint (CORE_ADDR next_pc
)
7979 if (single_step_breakpoints
[0] == NULL
)
7980 bpt_p
= &single_step_breakpoints
[0];
7983 gdb_assert (single_step_breakpoints
[1] == NULL
);
7984 bpt_p
= &single_step_breakpoints
[1];
7987 /* NOTE drow/2006-04-11: A future improvement to this function would be
7988 to only create the breakpoints once, and actually put them on the
7989 breakpoint chain. That would let us use set_raw_breakpoint. We could
7990 adjust the addresses each time they were needed. Doing this requires
7991 corresponding changes elsewhere where single step breakpoints are
7992 handled, however. So, for now, we use this. */
7994 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
7996 error (_("Could not insert single-step breakpoint at 0x%s"),
7997 paddr_nz (next_pc
));
8000 /* Remove and delete any breakpoints used for software single step. */
8003 remove_single_step_breakpoints (void)
8005 gdb_assert (single_step_breakpoints
[0] != NULL
);
8007 /* See insert_single_step_breakpoint for more about this deprecated
8009 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8010 single_step_breakpoints
[0] = NULL
;
8012 if (single_step_breakpoints
[1] != NULL
)
8014 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8015 single_step_breakpoints
[1] = NULL
;
8019 /* Check whether a software single-step breakpoint is inserted at PC. */
8022 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8026 for (i
= 0; i
< 2; i
++)
8028 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8029 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8037 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8038 It is defined as a macro to prevent duplication.
8039 COMMAND should be a string constant containing the name of the command. */
8040 #define BREAK_ARGS_HELP(command) \
8041 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8042 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8043 If a line number is specified, break at start of code for that line.\n\
8044 If a function is specified, break at start of code for that function.\n\
8045 If an address is specified, break at that exact address.\n\
8046 With no LOCATION, uses current execution address of selected stack frame.\n\
8047 This is useful for breaking on return to a stack frame.\n\
8049 THREADNUM is the number from \"info threads\".\n\
8050 CONDITION is a boolean expression.\n\
8052 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8054 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8056 /* List of subcommands for "catch". */
8057 static struct cmd_list_element
*catch_cmdlist
;
8059 /* List of subcommands for "tcatch". */
8060 static struct cmd_list_element
*tcatch_cmdlist
;
8062 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
8063 lists, and pass some additional user data to the command function. */
8065 add_catch_command (char *name
, char *docstring
,
8066 void (*sfunc
) (char *args
, int from_tty
,
8067 struct cmd_list_element
*command
),
8068 void *user_data_catch
,
8069 void *user_data_tcatch
)
8071 struct cmd_list_element
*command
;
8073 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8075 set_cmd_sfunc (command
, sfunc
);
8076 set_cmd_context (command
, user_data_catch
);
8078 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8080 set_cmd_sfunc (command
, sfunc
);
8081 set_cmd_context (command
, user_data_tcatch
);
8085 _initialize_breakpoint (void)
8087 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8088 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8089 struct cmd_list_element
*c
;
8091 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8093 breakpoint_chain
= 0;
8094 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8095 before a breakpoint is set. */
8096 breakpoint_count
= 0;
8098 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8099 Set ignore-count of breakpoint number N to COUNT.\n\
8100 Usage is `ignore N COUNT'."));
8102 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8104 add_com ("commands", class_breakpoint
, commands_command
, _("\
8105 Set commands to be executed when a breakpoint is hit.\n\
8106 Give breakpoint number as argument after \"commands\".\n\
8107 With no argument, the targeted breakpoint is the last one set.\n\
8108 The commands themselves follow starting on the next line.\n\
8109 Type a line containing \"end\" to indicate the end of them.\n\
8110 Give \"silent\" as the first line to make the breakpoint silent;\n\
8111 then no output is printed when it is hit, except what the commands print."));
8113 add_com ("condition", class_breakpoint
, condition_command
, _("\
8114 Specify breakpoint number N to break only if COND is true.\n\
8115 Usage is `condition N COND', where N is an integer and COND is an\n\
8116 expression to be evaluated whenever breakpoint N is reached."));
8118 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8119 Set a temporary breakpoint.\n\
8120 Like \"break\" except the breakpoint is only temporary,\n\
8121 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8122 by using \"enable delete\" on the breakpoint number.\n\
8124 BREAK_ARGS_HELP ("tbreak")));
8125 set_cmd_completer (c
, location_completer
);
8127 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8128 Set a hardware assisted breakpoint.\n\
8129 Like \"break\" except the breakpoint requires hardware support,\n\
8130 some target hardware may not have this support.\n\
8132 BREAK_ARGS_HELP ("hbreak")));
8133 set_cmd_completer (c
, location_completer
);
8135 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8136 Set a temporary hardware assisted breakpoint.\n\
8137 Like \"hbreak\" except the breakpoint is only temporary,\n\
8138 so it will be deleted when hit.\n\
8140 BREAK_ARGS_HELP ("thbreak")));
8141 set_cmd_completer (c
, location_completer
);
8143 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8144 Enable some breakpoints.\n\
8145 Give breakpoint numbers (separated by spaces) as arguments.\n\
8146 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8147 This is used to cancel the effect of the \"disable\" command.\n\
8148 With a subcommand you can enable temporarily."),
8149 &enablelist
, "enable ", 1, &cmdlist
);
8151 add_com ("ab", class_breakpoint
, enable_command
, _("\
8152 Enable some breakpoints.\n\
8153 Give breakpoint numbers (separated by spaces) as arguments.\n\
8154 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8155 This is used to cancel the effect of the \"disable\" command.\n\
8156 With a subcommand you can enable temporarily."));
8158 add_com_alias ("en", "enable", class_breakpoint
, 1);
8160 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8161 Enable some breakpoints.\n\
8162 Give breakpoint numbers (separated by spaces) as arguments.\n\
8163 This is used to cancel the effect of the \"disable\" command.\n\
8164 May be abbreviated to simply \"enable\".\n"),
8165 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8167 add_cmd ("once", no_class
, enable_once_command
, _("\
8168 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8169 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8172 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8173 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8174 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8177 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8178 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8179 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8182 add_cmd ("once", no_class
, enable_once_command
, _("\
8183 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8184 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8187 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8188 Disable some breakpoints.\n\
8189 Arguments are breakpoint numbers with spaces in between.\n\
8190 To disable all breakpoints, give no argument.\n\
8191 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8192 &disablelist
, "disable ", 1, &cmdlist
);
8193 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8194 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8196 add_com ("sb", class_breakpoint
, disable_command
, _("\
8197 Disable some breakpoints.\n\
8198 Arguments are breakpoint numbers with spaces in between.\n\
8199 To disable all breakpoints, give no argument.\n\
8200 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8202 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8203 Disable some breakpoints.\n\
8204 Arguments are breakpoint numbers with spaces in between.\n\
8205 To disable all breakpoints, give no argument.\n\
8206 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8207 This command may be abbreviated \"disable\"."),
8210 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8211 Delete some breakpoints or auto-display expressions.\n\
8212 Arguments are breakpoint numbers with spaces in between.\n\
8213 To delete all breakpoints, give no argument.\n\
8215 Also a prefix command for deletion of other GDB objects.\n\
8216 The \"unset\" command is also an alias for \"delete\"."),
8217 &deletelist
, "delete ", 1, &cmdlist
);
8218 add_com_alias ("d", "delete", class_breakpoint
, 1);
8219 add_com_alias ("del", "delete", class_breakpoint
, 1);
8221 add_com ("db", class_breakpoint
, delete_command
, _("\
8222 Delete some breakpoints.\n\
8223 Arguments are breakpoint numbers with spaces in between.\n\
8224 To delete all breakpoints, give no argument.\n"));
8226 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8227 Delete some breakpoints or auto-display expressions.\n\
8228 Arguments are breakpoint numbers with spaces in between.\n\
8229 To delete all breakpoints, give no argument.\n\
8230 This command may be abbreviated \"delete\"."),
8233 add_com ("clear", class_breakpoint
, clear_command
, _("\
8234 Clear breakpoint at specified line or function.\n\
8235 Argument may be line number, function name, or \"*\" and an address.\n\
8236 If line number is specified, all breakpoints in that line are cleared.\n\
8237 If function is specified, breakpoints at beginning of function are cleared.\n\
8238 If an address is specified, breakpoints at that address are cleared.\n\
8240 With no argument, clears all breakpoints in the line that the selected frame\n\
8243 See also the \"delete\" command which clears breakpoints by number."));
8245 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8246 Set breakpoint at specified line or function.\n"
8247 BREAK_ARGS_HELP ("break")));
8248 set_cmd_completer (c
, location_completer
);
8250 add_com_alias ("b", "break", class_run
, 1);
8251 add_com_alias ("br", "break", class_run
, 1);
8252 add_com_alias ("bre", "break", class_run
, 1);
8253 add_com_alias ("brea", "break", class_run
, 1);
8257 add_com_alias ("ba", "break", class_breakpoint
, 1);
8258 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8263 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8264 Break in function/address or break at a line in the current file."),
8265 &stoplist
, "stop ", 1, &cmdlist
);
8266 add_cmd ("in", class_breakpoint
, stopin_command
,
8267 _("Break in function or address."), &stoplist
);
8268 add_cmd ("at", class_breakpoint
, stopat_command
,
8269 _("Break at a line in the current file."), &stoplist
);
8270 add_com ("status", class_info
, breakpoints_info
, _("\
8271 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8272 The \"Type\" column indicates one of:\n\
8273 \tbreakpoint - normal breakpoint\n\
8274 \twatchpoint - watchpoint\n\
8275 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8276 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8277 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8278 address and file/line number respectively.\n\
8280 Convenience variable \"$_\" and default examine address for \"x\"\n\
8281 are set to the address of the last breakpoint listed unless the command\n\
8282 is prefixed with \"server \".\n\n\
8283 Convenience variable \"$bpnum\" contains the number of the last\n\
8287 add_info ("breakpoints", breakpoints_info
, _("\
8288 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8289 The \"Type\" column indicates one of:\n\
8290 \tbreakpoint - normal breakpoint\n\
8291 \twatchpoint - watchpoint\n\
8292 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8293 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8294 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8295 address and file/line number respectively.\n\
8297 Convenience variable \"$_\" and default examine address for \"x\"\n\
8298 are set to the address of the last breakpoint listed unless the command\n\
8299 is prefixed with \"server \".\n\n\
8300 Convenience variable \"$bpnum\" contains the number of the last\n\
8304 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8305 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8306 The \"Type\" column indicates one of:\n\
8307 \tbreakpoint - normal breakpoint\n\
8308 \twatchpoint - watchpoint\n\
8309 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8310 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8311 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8312 address and file/line number respectively.\n\
8314 Convenience variable \"$_\" and default examine address for \"x\"\n\
8315 are set to the address of the last breakpoint listed unless the command\n\
8316 is prefixed with \"server \".\n\n\
8317 Convenience variable \"$bpnum\" contains the number of the last\n\
8320 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8321 Status of all breakpoints, or breakpoint number NUMBER.\n\
8322 The \"Type\" column indicates one of:\n\
8323 \tbreakpoint - normal breakpoint\n\
8324 \twatchpoint - watchpoint\n\
8325 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8326 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8327 \tuntil - internal breakpoint used by the \"until\" command\n\
8328 \tfinish - internal breakpoint used by the \"finish\" command\n\
8329 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8330 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8331 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8332 address and file/line number respectively.\n\
8334 Convenience variable \"$_\" and default examine address for \"x\"\n\
8335 are set to the address of the last breakpoint listed unless the command\n\
8336 is prefixed with \"server \".\n\n\
8337 Convenience variable \"$bpnum\" contains the number of the last\n\
8339 &maintenanceinfolist
);
8341 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
8342 Set catchpoints to catch events."),
8343 &catch_cmdlist
, "catch ",
8344 0/*allow-unknown*/, &cmdlist
);
8346 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
8347 Set temporary catchpoints to catch events."),
8348 &tcatch_cmdlist
, "tcatch ",
8349 0/*allow-unknown*/, &cmdlist
);
8351 /* Add catch and tcatch sub-commands. */
8352 add_catch_command ("catch", _("\
8353 Catch an exception, when caught.\n\
8354 With an argument, catch only exceptions with the given name."),
8355 catch_catch_command
,
8358 add_catch_command ("throw", _("\
8359 Catch an exception, when thrown.\n\
8360 With an argument, catch only exceptions with the given name."),
8361 catch_throw_command
,
8364 add_catch_command ("fork", _("Catch calls to fork."),
8365 catch_fork_command_1
,
8366 (void *) (uintptr_t) catch_fork_permanent
,
8367 (void *) (uintptr_t) catch_fork_temporary
);
8368 add_catch_command ("vfork", _("Catch calls to vfork."),
8369 catch_fork_command_1
,
8370 (void *) (uintptr_t) catch_vfork_permanent
,
8371 (void *) (uintptr_t) catch_vfork_temporary
);
8372 add_catch_command ("exec", _("Catch calls to exec."),
8373 catch_exec_command_1
,
8376 add_catch_command ("exception", _("\
8377 Catch Ada exceptions, when raised.\n\
8378 With an argument, catch only exceptions with the given name."),
8379 catch_ada_exception_command
,
8382 add_catch_command ("assert", _("\
8383 Catch failed Ada assertions, when raised.\n\
8384 With an argument, catch only exceptions with the given name."),
8385 catch_assert_command
,
8389 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8390 Set a watchpoint for an expression.\n\
8391 A watchpoint stops execution of your program whenever the value of\n\
8392 an expression changes."));
8393 set_cmd_completer (c
, expression_completer
);
8395 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8396 Set a read watchpoint for an expression.\n\
8397 A watchpoint stops execution of your program whenever the value of\n\
8398 an expression is read."));
8399 set_cmd_completer (c
, expression_completer
);
8401 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8402 Set a watchpoint for an expression.\n\
8403 A watchpoint stops execution of your program whenever the value of\n\
8404 an expression is either read or written."));
8405 set_cmd_completer (c
, expression_completer
);
8407 add_info ("watchpoints", breakpoints_info
,
8408 _("Synonym for ``info breakpoints''."));
8411 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8412 respond to changes - contrary to the description. */
8413 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8414 &can_use_hw_watchpoints
, _("\
8415 Set debugger's willingness to use watchpoint hardware."), _("\
8416 Show debugger's willingness to use watchpoint hardware."), _("\
8417 If zero, gdb will not use hardware for new watchpoints, even if\n\
8418 such is available. (However, any hardware watchpoints that were\n\
8419 created before setting this to nonzero, will continue to use watchpoint\n\
8422 show_can_use_hw_watchpoints
,
8423 &setlist
, &showlist
);
8425 can_use_hw_watchpoints
= 1;
8427 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8428 Breakpoint specific settings\n\
8429 Configure various breakpoint-specific variables such as\n\
8430 pending breakpoint behavior"),
8431 &breakpoint_set_cmdlist
, "set breakpoint ",
8432 0/*allow-unknown*/, &setlist
);
8433 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8434 Breakpoint specific settings\n\
8435 Configure various breakpoint-specific variables such as\n\
8436 pending breakpoint behavior"),
8437 &breakpoint_show_cmdlist
, "show breakpoint ",
8438 0/*allow-unknown*/, &showlist
);
8440 add_setshow_auto_boolean_cmd ("pending", no_class
,
8441 &pending_break_support
, _("\
8442 Set debugger's behavior regarding pending breakpoints."), _("\
8443 Show debugger's behavior regarding pending breakpoints."), _("\
8444 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8445 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8446 an error. If auto, an unrecognized breakpoint location results in a\n\
8447 user-query to see if a pending breakpoint should be created."),
8449 show_pending_break_support
,
8450 &breakpoint_set_cmdlist
,
8451 &breakpoint_show_cmdlist
);
8453 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8455 add_setshow_boolean_cmd ("auto-hw", no_class
,
8456 &automatic_hardware_breakpoints
, _("\
8457 Set automatic usage of hardware breakpoints."), _("\
8458 Show automatic usage of hardware breakpoints."), _("\
8459 If set, the debugger will automatically use hardware breakpoints for\n\
8460 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8461 a warning will be emitted for such breakpoints."),
8463 show_automatic_hardware_breakpoints
,
8464 &breakpoint_set_cmdlist
,
8465 &breakpoint_show_cmdlist
);
8467 add_setshow_enum_cmd ("always-inserted", class_support
,
8468 always_inserted_enums
, &always_inserted_mode
, _("\
8469 Set mode for inserting breakpoints."), _("\
8470 Show mode for inserting breakpoints."), _("\
8471 When this mode is off, breakpoints are inserted in inferior when it is\n\
8472 resumed, and removed when execution stops. When this mode is on,\n\
8473 breakpoints are inserted immediately and removed only when the user\n\
8474 deletes the breakpoint. When this mode is auto (which is the default),\n\
8475 the behaviour depends on the non-stop setting (see help set non-stop).\n\
8476 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
8477 behaves as if always-inserted mode is on; if gdb is controlling the\n\
8478 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
8480 &show_always_inserted_mode
,
8481 &breakpoint_set_cmdlist
,
8482 &breakpoint_show_cmdlist
);
8484 automatic_hardware_breakpoints
= 1;