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?\n",
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_name_from_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_name_from_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 (except
3952 other permanent breakpoints) to be the duplicates. */
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_permanent
3967 && b
->owner
->enable_state
!= bp_disabled
3968 && b
->owner
->enable_state
!= bp_call_disabled
3969 && b
->enabled
&& !b
->shlib_disabled
3970 && b
->address
== address
/* address / overlay match */
3971 && (!overlay_debugging
|| b
->section
== section
)
3972 && breakpoint_address_is_meaningful (b
->owner
))
3975 internal_error (__FILE__
, __LINE__
,
3976 _("another breakpoint was inserted on top of "
3977 "a permanent breakpoint"));
3986 check_duplicates (struct breakpoint
*bpt
)
3988 struct bp_location
*bl
= bpt
->loc
;
3990 if (! breakpoint_address_is_meaningful (bpt
))
3993 for (; bl
; bl
= bl
->next
)
3994 check_duplicates_for (bl
->address
, bl
->section
);
3998 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3999 int bnum
, int have_bnum
)
4004 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4005 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4007 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4008 bnum
, astr1
, astr2
);
4010 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4013 /* Adjust a breakpoint's address to account for architectural constraints
4014 on breakpoint placement. Return the adjusted address. Note: Very
4015 few targets require this kind of adjustment. For most targets,
4016 this function is simply the identity function. */
4019 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4021 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4023 /* Very few targets need any kind of breakpoint adjustment. */
4026 else if (bptype
== bp_watchpoint
4027 || bptype
== bp_hardware_watchpoint
4028 || bptype
== bp_read_watchpoint
4029 || bptype
== bp_access_watchpoint
4030 || bptype
== bp_catchpoint
)
4032 /* Watchpoints and the various bp_catch_* eventpoints should not
4033 have their addresses modified. */
4038 CORE_ADDR adjusted_bpaddr
;
4040 /* Some targets have architectural constraints on the placement
4041 of breakpoint instructions. Obtain the adjusted address. */
4042 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4045 /* An adjusted breakpoint address can significantly alter
4046 a user's expectations. Print a warning if an adjustment
4048 if (adjusted_bpaddr
!= bpaddr
)
4049 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4051 return adjusted_bpaddr
;
4055 /* Allocate a struct bp_location. */
4057 static struct bp_location
*
4058 allocate_bp_location (struct breakpoint
*bpt
)
4060 struct bp_location
*loc
, *loc_p
;
4062 loc
= xmalloc (sizeof (struct bp_location
));
4063 memset (loc
, 0, sizeof (*loc
));
4067 loc
->shlib_disabled
= 0;
4076 case bp_longjmp_resume
:
4077 case bp_step_resume
:
4078 case bp_watchpoint_scope
:
4080 case bp_shlib_event
:
4081 case bp_thread_event
:
4082 case bp_overlay_event
:
4083 loc
->loc_type
= bp_loc_software_breakpoint
;
4085 case bp_hardware_breakpoint
:
4086 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4088 case bp_hardware_watchpoint
:
4089 case bp_read_watchpoint
:
4090 case bp_access_watchpoint
:
4091 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4095 loc
->loc_type
= bp_loc_other
;
4098 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4104 static void free_bp_location (struct bp_location
*loc
)
4109 if (loc
->function_name
)
4110 xfree (loc
->function_name
);
4115 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4116 that has type BPTYPE and has no locations as yet. */
4118 static struct breakpoint
*
4119 set_raw_breakpoint_without_location (enum bptype bptype
)
4121 struct breakpoint
*b
, *b1
;
4123 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4124 memset (b
, 0, sizeof (*b
));
4127 b
->language
= current_language
->la_language
;
4128 b
->input_radix
= input_radix
;
4130 b
->enable_state
= bp_enabled
;
4133 b
->ignore_count
= 0;
4135 b
->frame_id
= null_frame_id
;
4136 b
->forked_inferior_pid
= null_ptid
;
4137 b
->exec_pathname
= NULL
;
4139 b
->condition_not_parsed
= 0;
4141 /* Add this breakpoint to the end of the chain
4142 so that a list of breakpoints will come out in order
4143 of increasing numbers. */
4145 b1
= breakpoint_chain
;
4147 breakpoint_chain
= b
;
4157 /* Initialize loc->function_name. */
4159 set_breakpoint_location_function (struct bp_location
*loc
)
4161 if (loc
->owner
->type
== bp_breakpoint
4162 || loc
->owner
->type
== bp_hardware_breakpoint
)
4164 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4166 if (loc
->function_name
)
4167 loc
->function_name
= xstrdup (loc
->function_name
);
4171 /* set_raw_breakpoint is a low level routine for allocating and
4172 partially initializing a breakpoint of type BPTYPE. The newly
4173 created breakpoint's address, section, source file name, and line
4174 number are provided by SAL. The newly created and partially
4175 initialized breakpoint is added to the breakpoint chain and
4176 is also returned as the value of this function.
4178 It is expected that the caller will complete the initialization of
4179 the newly created breakpoint struct as well as output any status
4180 information regarding the creation of a new breakpoint. In
4181 particular, set_raw_breakpoint does NOT set the breakpoint
4182 number! Care should be taken to not allow an error to occur
4183 prior to completing the initialization of the breakpoint. If this
4184 should happen, a bogus breakpoint will be left on the chain. */
4187 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4189 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4190 CORE_ADDR adjusted_address
;
4192 /* Adjust the breakpoint's address prior to allocating a location.
4193 Once we call allocate_bp_location(), that mostly uninitialized
4194 location will be placed on the location chain. Adjustment of the
4195 breakpoint may cause target_read_memory() to be called and we do
4196 not want its scan of the location chain to find a breakpoint and
4197 location that's only been partially initialized. */
4198 adjusted_address
= adjust_breakpoint_address (sal
.pc
, b
->type
);
4200 b
->loc
= allocate_bp_location (b
);
4201 b
->loc
->requested_address
= sal
.pc
;
4202 b
->loc
->address
= adjusted_address
;
4204 if (sal
.symtab
== NULL
)
4205 b
->source_file
= NULL
;
4207 b
->source_file
= savestring (sal
.symtab
->filename
,
4208 strlen (sal
.symtab
->filename
));
4209 b
->loc
->section
= sal
.section
;
4210 b
->line_number
= sal
.line
;
4212 set_breakpoint_location_function (b
->loc
);
4214 breakpoints_changed ();
4220 /* Note that the breakpoint object B describes a permanent breakpoint
4221 instruction, hard-wired into the inferior's code. */
4223 make_breakpoint_permanent (struct breakpoint
*b
)
4225 struct bp_location
*bl
;
4226 b
->enable_state
= bp_permanent
;
4228 /* By definition, permanent breakpoints are already present in the code.
4229 Mark all locations as inserted. For now, make_breakpoint_permanent
4230 is called in just one place, so it's hard to say if it's reasonable
4231 to have permanent breakpoint with multiple locations or not,
4232 but it's easy to implmement. */
4233 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4237 static struct breakpoint
*
4238 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4240 static int internal_breakpoint_number
= -1;
4241 struct symtab_and_line sal
;
4242 struct breakpoint
*b
;
4244 init_sal (&sal
); /* initialize to zeroes */
4247 sal
.section
= find_pc_overlay (sal
.pc
);
4249 b
= set_raw_breakpoint (sal
, type
);
4250 b
->number
= internal_breakpoint_number
--;
4251 b
->disposition
= disp_donttouch
;
4258 create_longjmp_breakpoint (char *func_name
)
4260 struct minimal_symbol
*m
;
4262 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4264 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4265 update_global_location_list (1);
4268 /* Call this routine when stepping and nexting to enable a breakpoint
4269 if we do a longjmp(). When we hit that breakpoint, call
4270 set_longjmp_resume_breakpoint() to figure out where we are going. */
4273 set_longjmp_breakpoint (void)
4275 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4277 create_longjmp_breakpoint ("longjmp");
4278 create_longjmp_breakpoint ("_longjmp");
4279 create_longjmp_breakpoint ("siglongjmp");
4280 create_longjmp_breakpoint ("_siglongjmp");
4284 /* Delete all longjmp breakpoints from THREAD. */
4286 delete_longjmp_breakpoint (int thread
)
4288 struct breakpoint
*b
, *temp
;
4290 ALL_BREAKPOINTS_SAFE (b
, temp
)
4291 if (b
->type
== bp_longjmp
)
4293 if (b
->thread
== thread
)
4294 delete_breakpoint (b
);
4299 create_overlay_event_breakpoint_1 (char *func_name
, struct objfile
*objfile
)
4301 struct breakpoint
*b
;
4302 struct minimal_symbol
*m
;
4304 if ((m
= lookup_minimal_symbol_text (func_name
, objfile
)) == NULL
)
4307 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4309 b
->addr_string
= xstrdup (func_name
);
4311 if (overlay_debugging
== ovly_auto
)
4313 b
->enable_state
= bp_enabled
;
4314 overlay_events_enabled
= 1;
4318 b
->enable_state
= bp_disabled
;
4319 overlay_events_enabled
= 0;
4321 update_global_location_list (1);
4325 create_overlay_event_breakpoint (char *func_name
)
4327 struct objfile
*objfile
;
4328 ALL_OBJFILES (objfile
)
4329 create_overlay_event_breakpoint_1 (func_name
, objfile
);
4333 enable_overlay_breakpoints (void)
4335 struct breakpoint
*b
;
4338 if (b
->type
== bp_overlay_event
)
4340 b
->enable_state
= bp_enabled
;
4341 update_global_location_list (1);
4342 overlay_events_enabled
= 1;
4347 disable_overlay_breakpoints (void)
4349 struct breakpoint
*b
;
4352 if (b
->type
== bp_overlay_event
)
4354 b
->enable_state
= bp_disabled
;
4355 update_global_location_list (0);
4356 overlay_events_enabled
= 0;
4361 create_thread_event_breakpoint (CORE_ADDR address
)
4363 struct breakpoint
*b
;
4365 b
= create_internal_breakpoint (address
, bp_thread_event
);
4367 b
->enable_state
= bp_enabled
;
4368 /* addr_string has to be used or breakpoint_re_set will delete me. */
4369 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4371 update_global_location_list_nothrow (1);
4377 remove_thread_event_breakpoints (void)
4379 struct breakpoint
*b
, *temp
;
4381 ALL_BREAKPOINTS_SAFE (b
, temp
)
4382 if (b
->type
== bp_thread_event
)
4383 delete_breakpoint (b
);
4386 struct captured_parse_breakpoint_args
4389 struct symtabs_and_lines
*sals_p
;
4390 char ***addr_string_p
;
4394 struct lang_and_radix
4402 remove_solib_event_breakpoints (void)
4404 struct breakpoint
*b
, *temp
;
4406 ALL_BREAKPOINTS_SAFE (b
, temp
)
4407 if (b
->type
== bp_shlib_event
)
4408 delete_breakpoint (b
);
4412 create_solib_event_breakpoint (CORE_ADDR address
)
4414 struct breakpoint
*b
;
4416 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4417 update_global_location_list_nothrow (1);
4421 /* Disable any breakpoints that are on code in shared libraries. Only
4422 apply to enabled breakpoints, disabled ones can just stay disabled. */
4425 disable_breakpoints_in_shlibs (void)
4427 struct bp_location
*loc
;
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_name_from_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 /* SunOS a.out shared libraries are always mapped, so do not
4461 disable breakpoints; they will only be reported as unloaded
4462 through clear_solib when GDB discards its shared library
4463 list. See clear_solib for more information. */
4464 if (exec_bfd
!= NULL
4465 && bfd_get_flavour (exec_bfd
) == bfd_target_aout_flavour
)
4468 ALL_BP_LOCATIONS (loc
)
4470 struct breakpoint
*b
= loc
->owner
;
4471 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4472 || loc
->loc_type
== bp_loc_software_breakpoint
)
4473 && !loc
->shlib_disabled
)
4476 char *so_name
= PC_SOLIB (loc
->address
);
4478 char *so_name
= solib_name_from_address (loc
->address
);
4480 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4482 loc
->shlib_disabled
= 1;
4483 /* At this point, we cannot rely on remove_breakpoint
4484 succeeding so we must mark the breakpoint as not inserted
4485 to prevent future errors occurring in remove_breakpoints. */
4487 if (!disabled_shlib_breaks
)
4489 target_terminal_ours_for_output ();
4490 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4493 disabled_shlib_breaks
= 1;
4499 /* FORK & VFORK catchpoints. */
4501 /* Implement the "insert" breakpoint_ops method for fork catchpoints. */
4504 insert_catch_fork (struct breakpoint
*b
)
4506 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
4509 /* Implement the "remove" breakpoint_ops method for fork catchpoints. */
4512 remove_catch_fork (struct breakpoint
*b
)
4514 return target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
4517 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
4521 breakpoint_hit_catch_fork (struct breakpoint
*b
)
4523 return inferior_has_forked (inferior_ptid
, &b
->forked_inferior_pid
);
4526 /* Implement the "print_it" breakpoint_ops method for fork catchpoints. */
4528 static enum print_stop_action
4529 print_it_catch_fork (struct breakpoint
*b
)
4531 annotate_catchpoint (b
->number
);
4532 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
4533 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4534 return PRINT_SRC_AND_LOC
;
4537 /* Implement the "print_one" breakpoint_ops method for fork catchpoints. */
4540 print_one_catch_fork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4542 struct value_print_options opts
;
4544 get_user_print_options (&opts
);
4546 /* Field 4, the address, is omitted (which makes the columns
4547 not line up too nicely with the headers, but the effect
4548 is relatively readable). */
4549 if (opts
.addressprint
)
4550 ui_out_field_skip (uiout
, "addr");
4552 ui_out_text (uiout
, "fork");
4553 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4555 ui_out_text (uiout
, ", process ");
4556 ui_out_field_int (uiout
, "what",
4557 ptid_get_pid (b
->forked_inferior_pid
));
4558 ui_out_spaces (uiout
, 1);
4562 /* Implement the "print_mention" breakpoint_ops method for fork
4566 print_mention_catch_fork (struct breakpoint
*b
)
4568 printf_filtered (_("Catchpoint %d (fork)"), b
->number
);
4571 /* The breakpoint_ops structure to be used in fork catchpoints. */
4573 static struct breakpoint_ops catch_fork_breakpoint_ops
=
4577 breakpoint_hit_catch_fork
,
4578 print_it_catch_fork
,
4579 print_one_catch_fork
,
4580 print_mention_catch_fork
4583 /* Implement the "insert" breakpoint_ops method for vfork catchpoints. */
4586 insert_catch_vfork (struct breakpoint
*b
)
4588 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
4591 /* Implement the "remove" breakpoint_ops method for vfork catchpoints. */
4594 remove_catch_vfork (struct breakpoint
*b
)
4596 return target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
4599 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
4603 breakpoint_hit_catch_vfork (struct breakpoint
*b
)
4605 return inferior_has_vforked (inferior_ptid
, &b
->forked_inferior_pid
);
4608 /* Implement the "print_it" breakpoint_ops method for vfork catchpoints. */
4610 static enum print_stop_action
4611 print_it_catch_vfork (struct breakpoint
*b
)
4613 annotate_catchpoint (b
->number
);
4614 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
4615 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4616 return PRINT_SRC_AND_LOC
;
4619 /* Implement the "print_one" breakpoint_ops method for vfork catchpoints. */
4622 print_one_catch_vfork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4624 struct value_print_options opts
;
4626 get_user_print_options (&opts
);
4627 /* Field 4, the address, is omitted (which makes the columns
4628 not line up too nicely with the headers, but the effect
4629 is relatively readable). */
4630 if (opts
.addressprint
)
4631 ui_out_field_skip (uiout
, "addr");
4633 ui_out_text (uiout
, "vfork");
4634 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4636 ui_out_text (uiout
, ", process ");
4637 ui_out_field_int (uiout
, "what",
4638 ptid_get_pid (b
->forked_inferior_pid
));
4639 ui_out_spaces (uiout
, 1);
4643 /* Implement the "print_mention" breakpoint_ops method for vfork
4647 print_mention_catch_vfork (struct breakpoint
*b
)
4649 printf_filtered (_("Catchpoint %d (vfork)"), b
->number
);
4652 /* The breakpoint_ops structure to be used in vfork catchpoints. */
4654 static struct breakpoint_ops catch_vfork_breakpoint_ops
=
4658 breakpoint_hit_catch_vfork
,
4659 print_it_catch_vfork
,
4660 print_one_catch_vfork
,
4661 print_mention_catch_vfork
4664 /* Create a new breakpoint of the bp_catchpoint kind and return it.
4666 If TEMPFLAG is non-zero, then make the breakpoint temporary.
4667 If COND_STRING is not NULL, then store it in the breakpoint.
4668 OPS, if not NULL, is the breakpoint_ops structure associated
4669 to the catchpoint. */
4671 static struct breakpoint
*
4672 create_catchpoint (int tempflag
, char *cond_string
,
4673 struct breakpoint_ops
*ops
)
4675 struct symtab_and_line sal
;
4676 struct breakpoint
*b
;
4683 b
= set_raw_breakpoint (sal
, bp_catchpoint
);
4684 set_breakpoint_count (breakpoint_count
+ 1);
4685 b
->number
= breakpoint_count
;
4687 b
->cond_string
= (cond_string
== NULL
) ?
4688 NULL
: savestring (cond_string
, strlen (cond_string
));
4690 b
->addr_string
= NULL
;
4691 b
->enable_state
= bp_enabled
;
4692 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4696 update_global_location_list (1);
4702 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4703 struct breakpoint_ops
*ops
)
4705 struct breakpoint
*b
= create_catchpoint (tempflag
, cond_string
, ops
);
4707 /* FIXME: We should put this information in a breakpoint private data
4709 b
->forked_inferior_pid
= null_ptid
;
4712 /* Exec catchpoints. */
4715 insert_catch_exec (struct breakpoint
*b
)
4717 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
4721 remove_catch_exec (struct breakpoint
*b
)
4723 return target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
4727 breakpoint_hit_catch_exec (struct breakpoint
*b
)
4729 return inferior_has_execd (inferior_ptid
, &b
->exec_pathname
);
4732 static enum print_stop_action
4733 print_it_catch_exec (struct breakpoint
*b
)
4735 annotate_catchpoint (b
->number
);
4736 printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b
->number
,
4738 return PRINT_SRC_AND_LOC
;
4742 print_one_catch_exec (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4744 struct value_print_options opts
;
4746 get_user_print_options (&opts
);
4748 /* Field 4, the address, is omitted (which makes the columns
4749 not line up too nicely with the headers, but the effect
4750 is relatively readable). */
4751 if (opts
.addressprint
)
4752 ui_out_field_skip (uiout
, "addr");
4754 ui_out_text (uiout
, "exec");
4755 if (b
->exec_pathname
!= NULL
)
4757 ui_out_text (uiout
, ", program \"");
4758 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
4759 ui_out_text (uiout
, "\" ");
4764 print_mention_catch_exec (struct breakpoint
*b
)
4766 printf_filtered (_("Catchpoint %d (exec)"), b
->number
);
4769 static struct breakpoint_ops catch_exec_breakpoint_ops
=
4773 breakpoint_hit_catch_exec
,
4774 print_it_catch_exec
,
4775 print_one_catch_exec
,
4776 print_mention_catch_exec
4780 hw_breakpoint_used_count (void)
4782 struct breakpoint
*b
;
4787 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
4795 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4797 struct breakpoint
*b
;
4800 *other_type_used
= 0;
4803 if (breakpoint_enabled (b
))
4805 if (b
->type
== type
)
4807 else if ((b
->type
== bp_hardware_watchpoint
||
4808 b
->type
== bp_read_watchpoint
||
4809 b
->type
== bp_access_watchpoint
))
4810 *other_type_used
= 1;
4817 disable_watchpoints_before_interactive_call_start (void)
4819 struct breakpoint
*b
;
4823 if (((b
->type
== bp_watchpoint
)
4824 || (b
->type
== bp_hardware_watchpoint
)
4825 || (b
->type
== bp_read_watchpoint
)
4826 || (b
->type
== bp_access_watchpoint
))
4827 && breakpoint_enabled (b
))
4829 b
->enable_state
= bp_call_disabled
;
4830 update_global_location_list (0);
4836 enable_watchpoints_after_interactive_call_stop (void)
4838 struct breakpoint
*b
;
4842 if (((b
->type
== bp_watchpoint
)
4843 || (b
->type
== bp_hardware_watchpoint
)
4844 || (b
->type
== bp_read_watchpoint
)
4845 || (b
->type
== bp_access_watchpoint
))
4846 && (b
->enable_state
== bp_call_disabled
))
4848 b
->enable_state
= bp_enabled
;
4849 update_global_location_list (1);
4855 /* Set a breakpoint that will evaporate an end of command
4856 at address specified by SAL.
4857 Restrict it to frame FRAME if FRAME is nonzero. */
4860 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4863 struct breakpoint
*b
;
4864 b
= set_raw_breakpoint (sal
, type
);
4865 b
->enable_state
= bp_enabled
;
4866 b
->disposition
= disp_donttouch
;
4867 b
->frame_id
= frame_id
;
4869 /* If we're debugging a multi-threaded program, then we
4870 want momentary breakpoints to be active in only a
4871 single thread of control. */
4872 if (in_thread_list (inferior_ptid
))
4873 b
->thread
= pid_to_thread_id (inferior_ptid
);
4875 update_global_location_list_nothrow (1);
4881 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
4883 struct symtab_and_line sal
;
4885 sal
= find_pc_line (pc
, 0);
4887 sal
.section
= find_pc_overlay (pc
);
4888 sal
.explicit_pc
= 1;
4890 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
4894 /* Tell the user we have just set a breakpoint B. */
4897 mention (struct breakpoint
*b
)
4900 struct cleanup
*ui_out_chain
;
4901 struct value_print_options opts
;
4903 get_user_print_options (&opts
);
4905 /* FIXME: This is misplaced; mention() is called by things (like
4906 hitting a watchpoint) other than breakpoint creation. It should
4907 be possible to clean this up and at the same time replace the
4908 random calls to breakpoint_changed with this hook. */
4909 observer_notify_breakpoint_created (b
->number
);
4911 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4912 b
->ops
->print_mention (b
);
4917 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4920 ui_out_text (uiout
, "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_hardware_watchpoint
:
4928 ui_out_text (uiout
, "Hardware watchpoint ");
4929 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
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_read_watchpoint
:
4936 ui_out_text (uiout
, "Hardware read watchpoint ");
4937 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
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
);
4943 case bp_access_watchpoint
:
4944 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4945 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4946 ui_out_field_int (uiout
, "number", b
->number
);
4947 ui_out_text (uiout
, ": ");
4948 ui_out_field_string (uiout
, "exp", b
->exp_string
);
4949 do_cleanups (ui_out_chain
);
4952 if (ui_out_is_mi_like_p (uiout
))
4957 if (b
->disposition
== disp_del
)
4958 printf_filtered (_("Temporary breakpoint"));
4960 printf_filtered (_("Breakpoint"));
4961 printf_filtered (_(" %d"), b
->number
);
4964 case bp_hardware_breakpoint
:
4965 if (ui_out_is_mi_like_p (uiout
))
4970 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4977 case bp_longjmp_resume
:
4978 case bp_step_resume
:
4980 case bp_watchpoint_scope
:
4981 case bp_shlib_event
:
4982 case bp_thread_event
:
4983 case bp_overlay_event
:
4989 /* i18n: cagney/2005-02-11: Below needs to be merged into a
4993 printf_filtered (_(" (%s) pending."), b
->addr_string
);
4997 if (opts
.addressprint
|| b
->source_file
== NULL
)
4999 printf_filtered (" at ");
5000 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5003 printf_filtered (": file %s, line %d.",
5004 b
->source_file
, b
->line_number
);
5008 struct bp_location
*loc
= b
->loc
;
5010 for (; loc
; loc
= loc
->next
)
5012 printf_filtered (" (%d locations)", n
);
5017 if (ui_out_is_mi_like_p (uiout
))
5019 printf_filtered ("\n");
5023 static struct bp_location
*
5024 add_location_to_breakpoint (struct breakpoint
*b
,
5025 const struct symtab_and_line
*sal
)
5027 struct bp_location
*loc
, **tmp
;
5029 loc
= allocate_bp_location (b
);
5030 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5033 loc
->requested_address
= sal
->pc
;
5034 loc
->address
= adjust_breakpoint_address (loc
->requested_address
, b
->type
);
5035 loc
->section
= sal
->section
;
5037 set_breakpoint_location_function (loc
);
5042 /* Return 1 if LOC is pointing to a permanent breakpoint,
5043 return 0 otherwise. */
5046 bp_loc_is_permanent (struct bp_location
*loc
)
5050 const gdb_byte
*brk
;
5051 gdb_byte
*target_mem
;
5052 struct cleanup
*cleanup
;
5055 gdb_assert (loc
!= NULL
);
5057 addr
= loc
->address
;
5058 brk
= gdbarch_breakpoint_from_pc (current_gdbarch
, &addr
, &len
);
5060 /* Software breakpoints unsupported? */
5064 target_mem
= alloca (len
);
5066 /* Enable the automatic memory restoration from breakpoints while
5067 we read the memory. Otherwise we could say about our temporary
5068 breakpoints they are permanent. */
5069 cleanup
= make_show_memory_breakpoints_cleanup (0);
5071 if (target_read_memory (loc
->address
, target_mem
, len
) == 0
5072 && memcmp (target_mem
, brk
, len
) == 0)
5075 do_cleanups (cleanup
);
5082 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5083 as textual description of the location, and COND_STRING
5084 as condition expression. */
5087 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5089 enum bptype type
, enum bpdisp disposition
,
5090 int thread
, int ignore_count
,
5091 struct breakpoint_ops
*ops
, int from_tty
, int enabled
)
5093 struct breakpoint
*b
= NULL
;
5096 if (type
== bp_hardware_breakpoint
)
5098 int i
= hw_breakpoint_used_count ();
5099 int target_resources_ok
=
5100 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5102 if (target_resources_ok
== 0)
5103 error (_("No hardware breakpoint support in the target."));
5104 else if (target_resources_ok
< 0)
5105 error (_("Hardware breakpoints used exceeds limit."));
5108 for (i
= 0; i
< sals
.nelts
; ++i
)
5110 struct symtab_and_line sal
= sals
.sals
[i
];
5111 struct bp_location
*loc
;
5114 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5118 b
= set_raw_breakpoint (sal
, type
);
5119 set_breakpoint_count (breakpoint_count
+ 1);
5120 b
->number
= breakpoint_count
;
5123 b
->cond_string
= cond_string
;
5124 b
->ignore_count
= ignore_count
;
5125 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5126 b
->disposition
= disposition
;
5132 loc
= add_location_to_breakpoint (b
, &sal
);
5135 if (bp_loc_is_permanent (loc
))
5136 make_breakpoint_permanent (b
);
5140 char *arg
= b
->cond_string
;
5141 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5143 error (_("Garbage %s follows condition"), arg
);
5148 b
->addr_string
= addr_string
;
5150 /* addr_string has to be used or breakpoint_re_set will delete
5152 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5158 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5159 elements to fill the void space. */
5161 remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5163 int i
= index_to_remove
+1;
5164 int last_index
= sal
->nelts
-1;
5166 for (;i
<= last_index
; ++i
)
5167 sal
->sals
[i
-1] = sal
->sals
[i
];
5172 /* If appropriate, obtains all sals that correspond
5173 to the same file and line as SAL. This is done
5174 only if SAL does not have explicit PC and has
5175 line and file information. If we got just a single
5176 expanded sal, return the original.
5178 Otherwise, if SAL.explicit_line is not set, filter out
5179 all sals for which the name of enclosing function
5180 is different from SAL. This makes sure that if we have
5181 breakpoint originally set in template instantiation, say
5182 foo<int>(), we won't expand SAL to locations at the same
5183 line in all existing instantiations of 'foo'.
5186 static struct symtabs_and_lines
5187 expand_line_sal_maybe (struct symtab_and_line sal
)
5189 struct symtabs_and_lines expanded
;
5190 CORE_ADDR original_pc
= sal
.pc
;
5191 char *original_function
= NULL
;
5195 /* If we have explicit pc, don't expand.
5196 If we have no line number, we can't expand. */
5197 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5200 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5201 expanded
.sals
[0] = sal
;
5206 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5208 expanded
= expand_line_sal (sal
);
5209 if (expanded
.nelts
== 1)
5211 /* We had one sal, we got one sal. Without futher
5212 processing, just return the original sal. */
5213 xfree (expanded
.sals
);
5215 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5216 sal
.pc
= original_pc
;
5217 expanded
.sals
[0] = sal
;
5221 if (!sal
.explicit_line
)
5223 CORE_ADDR func_addr
, func_end
;
5224 for (i
= 0; i
< expanded
.nelts
; ++i
)
5226 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5227 char *this_function
;
5228 if (find_pc_partial_function (pc
, &this_function
,
5229 &func_addr
, &func_end
))
5231 if (this_function
&&
5232 strcmp (this_function
, original_function
) != 0)
5234 remove_sal (&expanded
, i
);
5237 else if (func_addr
== pc
)
5239 /* We're at beginning of a function, and should
5241 struct symbol
*sym
= find_pc_function (pc
);
5243 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5246 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5253 if (expanded
.nelts
<= 1)
5255 /* This is un ugly workaround. If we get zero
5256 expanded sals then something is really wrong.
5257 Fix that by returnign the original sal. */
5258 xfree (expanded
.sals
);
5260 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5261 sal
.pc
= original_pc
;
5262 expanded
.sals
[0] = sal
;
5269 for (i
= 0; i
< expanded
.nelts
; ++i
)
5270 if (expanded
.sals
[i
].pc
== original_pc
)
5281 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5282 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5283 value. COND_STRING, if not NULL, specified the condition to be
5284 used for all breakpoints. Essentially the only case where
5285 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5286 function. In that case, it's still not possible to specify
5287 separate conditions for different overloaded functions, so
5288 we take just a single condition string.
5290 NOTE: If the function succeeds, the caller is expected to cleanup
5291 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5292 array contents). If the function fails (error() is called), the
5293 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5294 COND and SALS arrays and each of those arrays contents. */
5297 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5299 enum bptype type
, enum bpdisp disposition
,
5300 int thread
, int ignore_count
,
5301 struct breakpoint_ops
*ops
, int from_tty
,
5305 for (i
= 0; i
< sals
.nelts
; ++i
)
5307 struct symtabs_and_lines expanded
=
5308 expand_line_sal_maybe (sals
.sals
[i
]);
5310 create_breakpoint (expanded
, addr_string
[i
],
5311 cond_string
, type
, disposition
,
5312 thread
, ignore_count
, ops
, from_tty
, enabled
);
5315 update_global_location_list (1);
5318 /* Parse ARG which is assumed to be a SAL specification possibly
5319 followed by conditionals. On return, SALS contains an array of SAL
5320 addresses found. ADDR_STRING contains a vector of (canonical)
5321 address strings. ARG points to the end of the SAL. */
5324 parse_breakpoint_sals (char **address
,
5325 struct symtabs_and_lines
*sals
,
5326 char ***addr_string
,
5329 char *addr_start
= *address
;
5330 *addr_string
= NULL
;
5331 /* If no arg given, or if first arg is 'if ', use the default
5333 if ((*address
) == NULL
5334 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5336 if (default_breakpoint_valid
)
5338 struct symtab_and_line sal
;
5339 init_sal (&sal
); /* initialize to zeroes */
5340 sals
->sals
= (struct symtab_and_line
*)
5341 xmalloc (sizeof (struct symtab_and_line
));
5342 sal
.pc
= default_breakpoint_address
;
5343 sal
.line
= default_breakpoint_line
;
5344 sal
.symtab
= default_breakpoint_symtab
;
5345 sal
.section
= find_pc_overlay (sal
.pc
);
5346 sals
->sals
[0] = sal
;
5350 error (_("No default breakpoint address now."));
5354 /* Force almost all breakpoints to be in terms of the
5355 current_source_symtab (which is decode_line_1's default). This
5356 should produce the results we want almost all of the time while
5357 leaving default_breakpoint_* alone.
5358 ObjC: However, don't match an Objective-C method name which
5359 may have a '+' or '-' succeeded by a '[' */
5361 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5363 if (default_breakpoint_valid
5365 || ((strchr ("+-", (*address
)[0]) != NULL
)
5366 && ((*address
)[1] != '['))))
5367 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5368 default_breakpoint_line
, addr_string
,
5371 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5372 addr_string
, not_found_ptr
);
5374 /* For any SAL that didn't have a canonical string, fill one in. */
5375 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5376 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5377 if (addr_start
!= (*address
))
5380 for (i
= 0; i
< sals
->nelts
; i
++)
5382 /* Add the string if not present. */
5383 if ((*addr_string
)[i
] == NULL
)
5384 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5390 /* Convert each SAL into a real PC. Verify that the PC can be
5391 inserted as a breakpoint. If it can't throw an error. */
5394 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5398 for (i
= 0; i
< sals
->nelts
; i
++)
5399 resolve_sal_pc (&sals
->sals
[i
]);
5403 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5405 struct captured_parse_breakpoint_args
*args
= data
;
5407 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5408 args
->not_found_ptr
);
5411 /* Given TOK, a string specification of condition and thread, as
5412 accepted by the 'break' command, extract the condition
5413 string and thread number and set *COND_STRING and *THREAD.
5414 PC identifies the context at which the condition should be parsed.
5415 If no condition is found, *COND_STRING is set to NULL.
5416 If no thread is found, *THREAD is set to -1. */
5418 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5419 char **cond_string
, int *thread
)
5421 *cond_string
= NULL
;
5427 char *cond_start
= NULL
;
5428 char *cond_end
= NULL
;
5429 while (*tok
== ' ' || *tok
== '\t')
5434 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5437 toklen
= end_tok
- tok
;
5439 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5441 struct expression
*expr
;
5443 tok
= cond_start
= end_tok
+ 1;
5444 expr
= parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5447 *cond_string
= savestring (cond_start
,
5448 cond_end
- cond_start
);
5450 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5456 *thread
= strtol (tok
, &tok
, 0);
5458 error (_("Junk after thread keyword."));
5459 if (!valid_thread_id (*thread
))
5460 error (_("Unknown thread %d."), *thread
);
5463 error (_("Junk at end of arguments."));
5467 /* Set a breakpoint. This function is shared between
5468 CLI and MI functions for setting a breakpoint.
5469 This function has two major modes of operations,
5470 selected by the PARSE_CONDITION_AND_THREAD parameter.
5471 If non-zero, the function will parse arg, extracting
5472 breakpoint location, address and thread. Otherwise,
5473 ARG is just the location of breakpoint, with condition
5474 and thread specified by the COND_STRING and THREAD
5478 break_command_really (char *arg
, char *cond_string
, int thread
,
5479 int parse_condition_and_thread
,
5480 int tempflag
, int hardwareflag
,
5482 enum auto_boolean pending_break_support
,
5483 struct breakpoint_ops
*ops
,
5487 struct gdb_exception e
;
5488 struct symtabs_and_lines sals
;
5489 struct symtab_and_line pending_sal
;
5492 char *addr_start
= arg
;
5494 struct cleanup
*old_chain
;
5495 struct cleanup
*breakpoint_chain
= NULL
;
5496 struct captured_parse_breakpoint_args parse_args
;
5505 parse_args
.arg_p
= &arg
;
5506 parse_args
.sals_p
= &sals
;
5507 parse_args
.addr_string_p
= &addr_string
;
5508 parse_args
.not_found_ptr
= ¬_found
;
5510 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5511 &parse_args
, RETURN_MASK_ALL
);
5513 /* If caller is interested in rc value from parse, set value. */
5517 throw_exception (e
);
5521 case NOT_FOUND_ERROR
:
5523 /* If pending breakpoint support is turned off, throw
5526 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5527 throw_exception (e
);
5529 exception_print (gdb_stderr
, e
);
5531 /* If pending breakpoint support is auto query and the user
5532 selects no, then simply return the error code. */
5533 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5534 !nquery ("Make breakpoint pending on future shared library load? "))
5537 /* At this point, either the user was queried about setting
5538 a pending breakpoint and selected yes, or pending
5539 breakpoint behavior is on and thus a pending breakpoint
5540 is defaulted on behalf of the user. */
5541 copy_arg
= xstrdup (addr_start
);
5542 addr_string
= ©_arg
;
5544 sals
.sals
= &pending_sal
;
5549 throw_exception (e
);
5556 /* Create a chain of things that always need to be cleaned up. */
5557 old_chain
= make_cleanup (null_cleanup
, 0);
5561 /* Make sure that all storage allocated to SALS gets freed. */
5562 make_cleanup (xfree
, sals
.sals
);
5564 /* Cleanup the addr_string array but not its contents. */
5565 make_cleanup (xfree
, addr_string
);
5568 /* ----------------------------- SNIP -----------------------------
5569 Anything added to the cleanup chain beyond this point is assumed
5570 to be part of a breakpoint. If the breakpoint create succeeds
5571 then the memory is not reclaimed. */
5572 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5574 /* Mark the contents of the addr_string for cleanup. These go on
5575 the breakpoint_chain and only occure if the breakpoint create
5577 for (i
= 0; i
< sals
.nelts
; i
++)
5579 if (addr_string
[i
] != NULL
)
5580 make_cleanup (xfree
, addr_string
[i
]);
5583 /* Resolve all line numbers to PC's and verify that the addresses
5584 are ok for the target. */
5586 breakpoint_sals_to_pc (&sals
, addr_start
);
5588 /* Verify that condition can be parsed, before setting any
5589 breakpoints. Allocate a separate condition expression for each
5593 if (parse_condition_and_thread
)
5595 /* Here we only parse 'arg' to separate condition
5596 from thread number, so parsing in context of first
5597 sal is OK. When setting the breakpoint we'll
5598 re-parse it in context of each sal. */
5601 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5603 make_cleanup (xfree
, cond_string
);
5607 /* Create a private copy of condition string. */
5610 cond_string
= xstrdup (cond_string
);
5611 make_cleanup (xfree
, cond_string
);
5614 create_breakpoints (sals
, addr_string
, cond_string
,
5615 hardwareflag
? bp_hardware_breakpoint
5617 tempflag
? disp_del
: disp_donttouch
,
5618 thread
, ignore_count
, ops
, from_tty
, enabled
);
5622 struct symtab_and_line sal
= {0};
5623 struct breakpoint
*b
;
5625 make_cleanup (xfree
, copy_arg
);
5627 b
= set_raw_breakpoint_without_location (hardwareflag
5628 ? bp_hardware_breakpoint
5630 set_breakpoint_count (breakpoint_count
+ 1);
5631 b
->number
= breakpoint_count
;
5633 b
->addr_string
= addr_string
[0];
5634 b
->cond_string
= NULL
;
5635 b
->ignore_count
= ignore_count
;
5636 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5637 b
->condition_not_parsed
= 1;
5639 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5641 update_global_location_list (1);
5646 warning (_("Multiple breakpoints were set.\n"
5647 "Use the \"delete\" command to delete unwanted breakpoints."));
5648 /* That's it. Discard the cleanups for data inserted into the
5650 discard_cleanups (breakpoint_chain
);
5651 /* But cleanup everything else. */
5652 do_cleanups (old_chain
);
5655 /* Set a breakpoint.
5656 ARG is a string describing breakpoint address,
5657 condition, and thread.
5658 FLAG specifies if a breakpoint is hardware on,
5659 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5663 break_command_1 (char *arg
, int flag
, int from_tty
)
5665 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5666 int tempflag
= flag
& BP_TEMPFLAG
;
5668 break_command_really (arg
,
5669 NULL
, 0, 1 /* parse arg */,
5670 tempflag
, hardwareflag
,
5671 0 /* Ignore count */,
5672 pending_break_support
,
5673 NULL
/* breakpoint_ops */,
5680 set_breakpoint (char *address
, char *condition
,
5681 int hardwareflag
, int tempflag
,
5682 int thread
, int ignore_count
,
5683 int pending
, int enabled
)
5685 break_command_really (address
, condition
, thread
,
5686 0 /* condition and thread are valid. */,
5687 tempflag
, hardwareflag
,
5690 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5694 /* Adjust SAL to the first instruction past the function prologue.
5695 The end of the prologue is determined using the line table from
5696 the debugging information.
5698 If SAL is already past the prologue, then do nothing. */
5701 skip_prologue_sal (struct symtab_and_line
*sal
)
5703 struct symbol
*sym
= find_pc_function (sal
->pc
);
5704 struct symtab_and_line start_sal
;
5709 start_sal
= find_function_start_sal (sym
, 1);
5710 if (sal
->pc
< start_sal
.pc
)
5714 /* Helper function for break_command_1 and disassemble_command. */
5717 resolve_sal_pc (struct symtab_and_line
*sal
)
5721 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5723 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5724 error (_("No line %d in file \"%s\"."),
5725 sal
->line
, sal
->symtab
->filename
);
5728 /* If this SAL corresponds to a breakpoint inserted using
5729 a line number, then skip the function prologue if necessary. */
5730 if (sal
->explicit_line
)
5731 skip_prologue_sal (sal
);
5734 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5736 struct blockvector
*bv
;
5740 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5743 sym
= block_linkage_function (b
);
5746 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5747 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
5751 /* It really is worthwhile to have the section, so we'll just
5752 have to look harder. This case can be executed if we have
5753 line numbers but no functions (as can happen in assembly
5756 struct minimal_symbol
*msym
;
5758 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5760 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
5767 break_command (char *arg
, int from_tty
)
5769 break_command_1 (arg
, 0, from_tty
);
5773 tbreak_command (char *arg
, int from_tty
)
5775 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5779 hbreak_command (char *arg
, int from_tty
)
5781 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5785 thbreak_command (char *arg
, int from_tty
)
5787 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5791 stop_command (char *arg
, int from_tty
)
5793 printf_filtered (_("Specify the type of breakpoint to set.\n\
5794 Usage: stop in <function | address>\n\
5795 stop at <line>\n"));
5799 stopin_command (char *arg
, int from_tty
)
5803 if (arg
== (char *) NULL
)
5805 else if (*arg
!= '*')
5810 /* look for a ':'. If this is a line number specification, then
5811 say it is bad, otherwise, it should be an address or
5812 function/method name */
5813 while (*argptr
&& !hasColon
)
5815 hasColon
= (*argptr
== ':');
5820 badInput
= (*argptr
!= ':'); /* Not a class::method */
5822 badInput
= isdigit (*arg
); /* a simple line number */
5826 printf_filtered (_("Usage: stop in <function | address>\n"));
5828 break_command_1 (arg
, 0, from_tty
);
5832 stopat_command (char *arg
, int from_tty
)
5836 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5843 /* look for a ':'. If there is a '::' then get out, otherwise
5844 it is probably a line number. */
5845 while (*argptr
&& !hasColon
)
5847 hasColon
= (*argptr
== ':');
5852 badInput
= (*argptr
== ':'); /* we have class::method */
5854 badInput
= !isdigit (*arg
); /* not a line number */
5858 printf_filtered (_("Usage: stop at <line>\n"));
5860 break_command_1 (arg
, 0, from_tty
);
5863 /* accessflag: hw_write: watch write,
5864 hw_read: watch read,
5865 hw_access: watch access (read or write) */
5867 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5869 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
5870 struct symtab_and_line sal
;
5871 struct expression
*exp
;
5872 struct block
*exp_valid_block
;
5873 struct value
*val
, *mark
;
5874 struct frame_info
*frame
;
5875 struct frame_info
*prev_frame
= NULL
;
5876 char *exp_start
= NULL
;
5877 char *exp_end
= NULL
;
5878 char *tok
, *id_tok_start
, *end_tok
;
5880 char *cond_start
= NULL
;
5881 char *cond_end
= NULL
;
5882 struct expression
*cond
= NULL
;
5883 int i
, other_type_used
, target_resources_ok
= 0;
5884 enum bptype bp_type
;
5888 init_sal (&sal
); /* initialize to zeroes */
5890 /* Make sure that we actually have parameters to parse. */
5891 if (arg
!= NULL
&& arg
[0] != '\0')
5893 toklen
= strlen (arg
); /* Size of argument list. */
5895 /* Points tok to the end of the argument list. */
5896 tok
= arg
+ toklen
- 1;
5898 /* Go backwards in the parameters list. Skip the last parameter.
5899 If we're expecting a 'thread <thread_num>' parameter, this should
5900 be the thread identifier. */
5901 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5903 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5906 /* Points end_tok to the beginning of the last token. */
5907 id_tok_start
= tok
+ 1;
5909 /* Go backwards in the parameters list. Skip one more parameter.
5910 If we're expecting a 'thread <thread_num>' parameter, we should
5911 reach a "thread" token. */
5912 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5917 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5920 /* Move the pointer forward to skip the whitespace and
5921 calculate the length of the token. */
5923 toklen
= end_tok
- tok
;
5925 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5927 /* At this point we've found a "thread" token, which means
5928 the user is trying to set a watchpoint that triggers
5929 only in a specific thread. */
5932 /* Extract the thread ID from the next token. */
5933 thread
= strtol (id_tok_start
, &endp
, 0);
5935 /* Check if the user provided a valid numeric value for the
5937 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
5938 error (_("Invalid thread ID specification %s."), id_tok_start
);
5940 /* Check if the thread actually exists. */
5941 if (!valid_thread_id (thread
))
5942 error (_("Unknown thread %d."), thread
);
5944 /* Truncate the string and get rid of the thread <thread_num>
5945 parameter before the parameter list is parsed by the
5946 evaluate_expression() function. */
5951 /* Parse the rest of the arguments. */
5952 innermost_block
= NULL
;
5954 exp
= parse_exp_1 (&arg
, 0, 0);
5956 /* Remove trailing whitespace from the expression before saving it.
5957 This makes the eventual display of the expression string a bit
5959 while (exp_end
> exp_start
&& (exp_end
[-1] == ' ' || exp_end
[-1] == '\t'))
5962 exp_valid_block
= innermost_block
;
5963 mark
= value_mark ();
5964 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
5966 release_value (val
);
5969 while (*tok
== ' ' || *tok
== '\t')
5973 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5976 toklen
= end_tok
- tok
;
5977 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5979 tok
= cond_start
= end_tok
+ 1;
5980 cond
= parse_exp_1 (&tok
, 0, 0);
5984 error (_("Junk at end of command."));
5986 if (accessflag
== hw_read
)
5987 bp_type
= bp_read_watchpoint
;
5988 else if (accessflag
== hw_access
)
5989 bp_type
= bp_access_watchpoint
;
5991 bp_type
= bp_hardware_watchpoint
;
5993 mem_cnt
= can_use_hardware_watchpoint (val
);
5994 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5995 error (_("Expression cannot be implemented with read/access watchpoint."));
5998 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5999 target_resources_ok
=
6000 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
6002 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
6003 error (_("Target does not support this type of hardware watchpoint."));
6005 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
6006 error (_("Target can only support one kind of HW watchpoint at a time."));
6009 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
6010 watchpoint could not be set. */
6011 if (!mem_cnt
|| target_resources_ok
<= 0)
6012 bp_type
= bp_watchpoint
;
6014 frame
= block_innermost_frame (exp_valid_block
);
6016 prev_frame
= get_prev_frame (frame
);
6020 /* If the expression is "local", then set up a "watchpoint scope"
6021 breakpoint at the point where we've left the scope of the watchpoint
6022 expression. Create the scope breakpoint before the watchpoint, so
6023 that we will encounter it first in bpstat_stop_status. */
6024 if (innermost_block
&& prev_frame
)
6026 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
6027 bp_watchpoint_scope
);
6029 scope_breakpoint
->enable_state
= bp_enabled
;
6031 /* Automatically delete the breakpoint when it hits. */
6032 scope_breakpoint
->disposition
= disp_del
;
6034 /* Only break in the proper frame (help with recursion). */
6035 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
6037 /* Set the address at which we will stop. */
6038 scope_breakpoint
->loc
->requested_address
6039 = get_frame_pc (prev_frame
);
6040 scope_breakpoint
->loc
->address
6041 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
6042 scope_breakpoint
->type
);
6045 /* Now set up the breakpoint. */
6046 b
= set_raw_breakpoint (sal
, bp_type
);
6047 set_breakpoint_count (breakpoint_count
+ 1);
6048 b
->number
= breakpoint_count
;
6050 b
->disposition
= disp_donttouch
;
6052 b
->exp_valid_block
= exp_valid_block
;
6053 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6056 b
->loc
->cond
= cond
;
6058 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6063 b
->watchpoint_frame
= get_frame_id (frame
);
6065 b
->watchpoint_frame
= null_frame_id
;
6067 if (scope_breakpoint
!= NULL
)
6069 /* The scope breakpoint is related to the watchpoint. We will
6070 need to act on them together. */
6071 b
->related_breakpoint
= scope_breakpoint
;
6072 scope_breakpoint
->related_breakpoint
= b
;
6075 value_free_to_mark (mark
);
6077 update_global_location_list (1);
6080 /* Return count of locations need to be watched and can be handled
6081 in hardware. If the watchpoint can not be handled
6082 in hardware return zero. */
6085 can_use_hardware_watchpoint (struct value
*v
)
6087 int found_memory_cnt
= 0;
6088 struct value
*head
= v
;
6090 /* Did the user specifically forbid us to use hardware watchpoints? */
6091 if (!can_use_hw_watchpoints
)
6094 /* Make sure that the value of the expression depends only upon
6095 memory contents, and values computed from them within GDB. If we
6096 find any register references or function calls, we can't use a
6097 hardware watchpoint.
6099 The idea here is that evaluating an expression generates a series
6100 of values, one holding the value of every subexpression. (The
6101 expression a*b+c has five subexpressions: a, b, a*b, c, and
6102 a*b+c.) GDB's values hold almost enough information to establish
6103 the criteria given above --- they identify memory lvalues,
6104 register lvalues, computed values, etcetera. So we can evaluate
6105 the expression, and then scan the chain of values that leaves
6106 behind to decide whether we can detect any possible change to the
6107 expression's final value using only hardware watchpoints.
6109 However, I don't think that the values returned by inferior
6110 function calls are special in any way. So this function may not
6111 notice that an expression involving an inferior function call
6112 can't be watched with hardware watchpoints. FIXME. */
6113 for (; v
; v
= value_next (v
))
6115 if (VALUE_LVAL (v
) == lval_memory
)
6118 /* A lazy memory lvalue is one that GDB never needed to fetch;
6119 we either just used its address (e.g., `a' in `a.b') or
6120 we never needed it at all (e.g., `a' in `a,b'). */
6124 /* Ahh, memory we actually used! Check if we can cover
6125 it with hardware watchpoints. */
6126 struct type
*vtype
= check_typedef (value_type (v
));
6128 /* We only watch structs and arrays if user asked for it
6129 explicitly, never if they just happen to appear in a
6130 middle of some value chain. */
6132 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6133 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6135 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
6136 int len
= TYPE_LENGTH (value_type (v
));
6138 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6145 else if (VALUE_LVAL (v
) != not_lval
6146 && deprecated_value_modifiable (v
) == 0)
6147 return 0; /* ??? What does this represent? */
6148 else if (VALUE_LVAL (v
) == lval_register
)
6149 return 0; /* cannot watch a register with a HW watchpoint */
6152 /* The expression itself looks suitable for using a hardware
6153 watchpoint, but give the target machine a chance to reject it. */
6154 return found_memory_cnt
;
6158 watch_command_wrapper (char *arg
, int from_tty
)
6160 watch_command (arg
, from_tty
);
6164 watch_command (char *arg
, int from_tty
)
6166 watch_command_1 (arg
, hw_write
, from_tty
);
6170 rwatch_command_wrapper (char *arg
, int from_tty
)
6172 rwatch_command (arg
, from_tty
);
6176 rwatch_command (char *arg
, int from_tty
)
6178 watch_command_1 (arg
, hw_read
, from_tty
);
6182 awatch_command_wrapper (char *arg
, int from_tty
)
6184 awatch_command (arg
, from_tty
);
6188 awatch_command (char *arg
, int from_tty
)
6190 watch_command_1 (arg
, hw_access
, from_tty
);
6194 /* Helper routines for the until_command routine in infcmd.c. Here
6195 because it uses the mechanisms of breakpoints. */
6197 struct until_break_command_continuation_args
6199 struct breakpoint
*breakpoint
;
6200 struct breakpoint
*breakpoint2
;
6203 /* This function is called by fetch_inferior_event via the
6204 cmd_continuation pointer, to complete the until command. It takes
6205 care of cleaning up the temporary breakpoints set up by the until
6208 until_break_command_continuation (void *arg
)
6210 struct until_break_command_continuation_args
*a
= arg
;
6212 delete_breakpoint (a
->breakpoint
);
6214 delete_breakpoint (a
->breakpoint2
);
6218 until_break_command (char *arg
, int from_tty
, int anywhere
)
6220 struct symtabs_and_lines sals
;
6221 struct symtab_and_line sal
;
6222 struct frame_info
*frame
= get_selected_frame (NULL
);
6223 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6224 struct breakpoint
*breakpoint
;
6225 struct breakpoint
*breakpoint2
= NULL
;
6226 struct cleanup
*old_chain
;
6228 clear_proceed_status ();
6230 /* Set a breakpoint where the user wants it and at return from
6233 if (default_breakpoint_valid
)
6234 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6235 default_breakpoint_line
, (char ***) NULL
, NULL
);
6237 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6238 0, (char ***) NULL
, NULL
);
6240 if (sals
.nelts
!= 1)
6241 error (_("Couldn't get information on specified line."));
6244 xfree (sals
.sals
); /* malloc'd, so freed */
6247 error (_("Junk at end of arguments."));
6249 resolve_sal_pc (&sal
);
6252 /* If the user told us to continue until a specified location,
6253 we don't specify a frame at which we need to stop. */
6254 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6256 /* Otherwise, specify the current frame, because we want to stop only
6257 at the very same frame. */
6258 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6261 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6263 /* Keep within the current frame, or in frames called by the current
6267 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6268 sal
.pc
= get_frame_pc (prev_frame
);
6269 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6271 make_cleanup_delete_breakpoint (breakpoint2
);
6274 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6276 /* If we are running asynchronously, and proceed call above has actually
6277 managed to start the target, arrange for breakpoints to be
6278 deleted when the target stops. Otherwise, we're already stopped and
6279 delete breakpoints via cleanup chain. */
6281 if (target_can_async_p () && is_running (inferior_ptid
))
6283 struct until_break_command_continuation_args
*args
;
6284 args
= xmalloc (sizeof (*args
));
6286 args
->breakpoint
= breakpoint
;
6287 args
->breakpoint2
= breakpoint2
;
6289 discard_cleanups (old_chain
);
6290 add_continuation (inferior_thread (),
6291 until_break_command_continuation
, args
,
6295 do_cleanups (old_chain
);
6299 ep_skip_leading_whitespace (char **s
)
6301 if ((s
== NULL
) || (*s
== NULL
))
6303 while (isspace (**s
))
6307 /* This function attempts to parse an optional "if <cond>" clause
6308 from the arg string. If one is not found, it returns NULL.
6310 Else, it returns a pointer to the condition string. (It does not
6311 attempt to evaluate the string against a particular block.) And,
6312 it updates arg to point to the first character following the parsed
6313 if clause in the arg string. */
6316 ep_parse_optional_if_clause (char **arg
)
6320 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6323 /* Skip the "if" keyword. */
6326 /* Skip any extra leading whitespace, and record the start of the
6327 condition string. */
6328 ep_skip_leading_whitespace (arg
);
6331 /* Assume that the condition occupies the remainder of the arg string. */
6332 (*arg
) += strlen (cond_string
);
6337 /* This function attempts to parse an optional filename from the arg
6338 string. If one is not found, it returns NULL.
6340 Else, it returns a pointer to the parsed filename. (This function
6341 makes no attempt to verify that a file of that name exists, or is
6342 accessible.) And, it updates arg to point to the first character
6343 following the parsed filename in the arg string.
6345 Note that clients needing to preserve the returned filename for
6346 future access should copy it to their own buffers. */
6348 ep_parse_optional_filename (char **arg
)
6350 static char filename
[1024];
6355 if ((*arg_p
== '\0') || isspace (*arg_p
))
6373 /* Commands to deal with catching events, such as signals, exceptions,
6374 process start/exit, etc. */
6378 catch_fork_temporary
, catch_vfork_temporary
,
6379 catch_fork_permanent
, catch_vfork_permanent
6384 catch_fork_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6386 char *cond_string
= NULL
;
6387 catch_fork_kind fork_kind
;
6390 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
6391 tempflag
= (fork_kind
== catch_fork_temporary
6392 || fork_kind
== catch_vfork_temporary
);
6396 ep_skip_leading_whitespace (&arg
);
6398 /* The allowed syntax is:
6400 catch [v]fork if <cond>
6402 First, check if there's an if clause. */
6403 cond_string
= ep_parse_optional_if_clause (&arg
);
6405 if ((*arg
!= '\0') && !isspace (*arg
))
6406 error (_("Junk at end of arguments."));
6408 /* If this target supports it, create a fork or vfork catchpoint
6409 and enable reporting of such events. */
6412 case catch_fork_temporary
:
6413 case catch_fork_permanent
:
6414 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6415 &catch_fork_breakpoint_ops
);
6417 case catch_vfork_temporary
:
6418 case catch_vfork_permanent
:
6419 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6420 &catch_vfork_breakpoint_ops
);
6423 error (_("unsupported or unknown fork kind; cannot catch it"));
6429 catch_exec_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6432 char *cond_string
= NULL
;
6434 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6438 ep_skip_leading_whitespace (&arg
);
6440 /* The allowed syntax is:
6442 catch exec if <cond>
6444 First, check if there's an if clause. */
6445 cond_string
= ep_parse_optional_if_clause (&arg
);
6447 if ((*arg
!= '\0') && !isspace (*arg
))
6448 error (_("Junk at end of arguments."));
6450 /* If this target supports it, create an exec catchpoint
6451 and enable reporting of such events. */
6452 create_catchpoint (tempflag
, cond_string
, &catch_exec_breakpoint_ops
);
6455 static enum print_stop_action
6456 print_exception_catchpoint (struct breakpoint
*b
)
6458 int bp_temp
, bp_throw
;
6460 annotate_catchpoint (b
->number
);
6462 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6463 if (b
->loc
->address
!= b
->loc
->requested_address
)
6464 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6467 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6469 bp_temp
? "Temporary catchpoint "
6471 if (!ui_out_is_mi_like_p (uiout
))
6472 ui_out_field_int (uiout
, "bkptno", b
->number
);
6474 bp_throw
? " (exception thrown), "
6475 : " (exception caught), ");
6476 if (ui_out_is_mi_like_p (uiout
))
6478 ui_out_field_string (uiout
, "reason",
6479 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6480 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6481 ui_out_field_int (uiout
, "bkptno", b
->number
);
6483 return PRINT_SRC_AND_LOC
;
6487 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6489 struct value_print_options opts
;
6490 get_user_print_options (&opts
);
6491 if (opts
.addressprint
)
6494 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6495 ui_out_field_string (uiout
, "addr", "<PENDING>");
6497 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6501 *last_addr
= b
->loc
->address
;
6502 if (strstr (b
->addr_string
, "throw") != NULL
)
6503 ui_out_field_string (uiout
, "what", "exception throw");
6505 ui_out_field_string (uiout
, "what", "exception catch");
6509 print_mention_exception_catchpoint (struct breakpoint
*b
)
6514 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6515 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6516 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6517 : _("Catchpoint "));
6518 ui_out_field_int (uiout
, "bkptno", b
->number
);
6519 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6523 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6526 NULL
, /* breakpoint_hit */
6527 print_exception_catchpoint
,
6528 print_one_exception_catchpoint
,
6529 print_mention_exception_catchpoint
6533 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6534 enum exception_event_kind ex_event
, int from_tty
)
6536 char *trigger_func_name
;
6538 if (ex_event
== EX_EVENT_CATCH
)
6539 trigger_func_name
= "__cxa_begin_catch";
6541 trigger_func_name
= "__cxa_throw";
6543 break_command_really (trigger_func_name
, cond_string
, -1,
6544 0 /* condition and thread are valid. */,
6547 AUTO_BOOLEAN_TRUE
/* pending */,
6548 &gnu_v3_exception_catchpoint_ops
, from_tty
,
6554 /* Deal with "catch catch" and "catch throw" commands */
6557 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6558 int tempflag
, int from_tty
)
6560 char *cond_string
= NULL
;
6561 struct symtab_and_line
*sal
= NULL
;
6565 ep_skip_leading_whitespace (&arg
);
6567 cond_string
= ep_parse_optional_if_clause (&arg
);
6569 if ((*arg
!= '\0') && !isspace (*arg
))
6570 error (_("Junk at end of arguments."));
6572 if ((ex_event
!= EX_EVENT_THROW
) &&
6573 (ex_event
!= EX_EVENT_CATCH
))
6574 error (_("Unsupported or unknown exception event; cannot catch it"));
6576 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6579 warning (_("Unsupported with this platform/compiler combination."));
6582 /* Implementation of "catch catch" command. */
6585 catch_catch_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_CATCH
, arg
, tempflag
, from_tty
);
6591 /* Implementation of "catch throw" command. */
6594 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6596 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6597 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
6600 /* Create a breakpoint struct for Ada exception catchpoints. */
6603 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6607 struct expression
*cond
,
6608 struct breakpoint_ops
*ops
,
6612 struct breakpoint
*b
;
6616 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6617 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6618 version for exception catchpoints, because two catchpoints
6619 used for different exception names will use the same address.
6620 In this case, a "breakpoint ... also set at..." warning is
6621 unproductive. Besides. the warning phrasing is also a bit
6622 inapropriate, we should use the word catchpoint, and tell
6623 the user what type of catchpoint it is. The above is good
6624 enough for now, though. */
6627 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6628 set_breakpoint_count (breakpoint_count
+ 1);
6630 b
->enable_state
= bp_enabled
;
6631 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6632 b
->number
= breakpoint_count
;
6633 b
->ignore_count
= 0;
6634 b
->loc
->cond
= cond
;
6635 b
->addr_string
= addr_string
;
6636 b
->language
= language_ada
;
6637 b
->cond_string
= cond_string
;
6638 b
->exp_string
= exp_string
;
6643 update_global_location_list (1);
6646 /* Implement the "catch exception" command. */
6649 catch_ada_exception_command (char *arg
, int from_tty
,
6650 struct cmd_list_element
*command
)
6653 struct symtab_and_line sal
;
6655 char *addr_string
= NULL
;
6656 char *exp_string
= NULL
;
6657 char *cond_string
= NULL
;
6658 struct expression
*cond
= NULL
;
6659 struct breakpoint_ops
*ops
= NULL
;
6661 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6665 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6666 &cond_string
, &cond
, &ops
);
6667 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6668 cond_string
, cond
, ops
, tempflag
,
6672 /* Implement the "catch assert" command. */
6675 catch_assert_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6678 struct symtab_and_line sal
;
6679 char *addr_string
= NULL
;
6680 struct breakpoint_ops
*ops
= NULL
;
6682 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6686 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6687 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6688 tempflag
, from_tty
);
6692 catch_command (char *arg
, int from_tty
)
6694 error (_("Catch requires an event name."));
6699 tcatch_command (char *arg
, int from_tty
)
6701 error (_("Catch requires an event name."));
6704 /* Delete breakpoints by address or line. */
6707 clear_command (char *arg
, int from_tty
)
6709 struct breakpoint
*b
;
6710 VEC(breakpoint_p
) *found
= 0;
6713 struct symtabs_and_lines sals
;
6714 struct symtab_and_line sal
;
6719 sals
= decode_line_spec (arg
, 1);
6724 sals
.sals
= (struct symtab_and_line
*)
6725 xmalloc (sizeof (struct symtab_and_line
));
6726 make_cleanup (xfree
, sals
.sals
);
6727 init_sal (&sal
); /* initialize to zeroes */
6728 sal
.line
= default_breakpoint_line
;
6729 sal
.symtab
= default_breakpoint_symtab
;
6730 sal
.pc
= default_breakpoint_address
;
6731 if (sal
.symtab
== 0)
6732 error (_("No source file specified."));
6740 /* We don't call resolve_sal_pc here. That's not
6741 as bad as it seems, because all existing breakpoints
6742 typically have both file/line and pc set. So, if
6743 clear is given file/line, we can match this to existing
6744 breakpoint without obtaining pc at all.
6746 We only support clearing given the address explicitly
6747 present in breakpoint table. Say, we've set breakpoint
6748 at file:line. There were several PC values for that file:line,
6749 due to optimization, all in one block.
6750 We've picked one PC value. If "clear" is issued with another
6751 PC corresponding to the same file:line, the breakpoint won't
6752 be cleared. We probably can still clear the breakpoint, but
6753 since the other PC value is never presented to user, user
6754 can only find it by guessing, and it does not seem important
6757 /* For each line spec given, delete bps which correspond
6758 to it. Do it in two passes, solely to preserve the current
6759 behavior that from_tty is forced true if we delete more than
6763 for (i
= 0; i
< sals
.nelts
; i
++)
6765 /* If exact pc given, clear bpts at that pc.
6766 If line given (pc == 0), clear all bpts on specified line.
6767 If defaulting, clear all bpts on default line
6770 defaulting sal.pc != 0 tests to do
6775 1 0 <can't happen> */
6779 /* Find all matching breakpoints and add them to
6784 /* Are we going to delete b? */
6785 if (b
->type
!= bp_none
6786 && b
->type
!= bp_watchpoint
6787 && b
->type
!= bp_hardware_watchpoint
6788 && b
->type
!= bp_read_watchpoint
6789 && b
->type
!= bp_access_watchpoint
)
6791 struct bp_location
*loc
= b
->loc
;
6792 for (; loc
; loc
= loc
->next
)
6794 int pc_match
= sal
.pc
6795 && (loc
->address
== sal
.pc
)
6796 && (!section_is_overlay (loc
->section
)
6797 || loc
->section
== sal
.section
);
6798 int line_match
= ((default_match
|| (0 == sal
.pc
))
6799 && b
->source_file
!= NULL
6800 && sal
.symtab
!= NULL
6801 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6802 && b
->line_number
== sal
.line
);
6803 if (pc_match
|| line_match
)
6812 VEC_safe_push(breakpoint_p
, found
, b
);
6815 /* Now go thru the 'found' chain and delete them. */
6816 if (VEC_empty(breakpoint_p
, found
))
6819 error (_("No breakpoint at %s."), arg
);
6821 error (_("No breakpoint at this line."));
6824 if (VEC_length(breakpoint_p
, found
) > 1)
6825 from_tty
= 1; /* Always report if deleted more than one */
6828 if (VEC_length(breakpoint_p
, found
) == 1)
6829 printf_unfiltered (_("Deleted breakpoint "));
6831 printf_unfiltered (_("Deleted breakpoints "));
6833 breakpoints_changed ();
6835 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6838 printf_unfiltered ("%d ", b
->number
);
6839 delete_breakpoint (b
);
6842 putchar_unfiltered ('\n');
6845 /* Delete breakpoint in BS if they are `delete' breakpoints and
6846 all breakpoints that are marked for deletion, whether hit or not.
6847 This is called after any breakpoint is hit, or after errors. */
6850 breakpoint_auto_delete (bpstat bs
)
6852 struct breakpoint
*b
, *temp
;
6854 for (; bs
; bs
= bs
->next
)
6855 if (bs
->breakpoint_at
6856 && bs
->breakpoint_at
->owner
6857 && bs
->breakpoint_at
->owner
->disposition
== disp_del
6859 delete_breakpoint (bs
->breakpoint_at
->owner
);
6861 ALL_BREAKPOINTS_SAFE (b
, temp
)
6863 if (b
->disposition
== disp_del_at_next_stop
)
6864 delete_breakpoint (b
);
6868 /* A cleanup function which destroys a vector. */
6871 do_vec_free (void *p
)
6873 VEC(bp_location_p
) **vec
= p
;
6875 VEC_free (bp_location_p
, *vec
);
6878 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
6879 into the inferior, only remove already-inserted locations that no
6880 longer should be inserted. Functions that delete a breakpoint or
6881 breakpoints should pass false, so that deleting a breakpoint
6882 doesn't have the side effect of inserting the locations of other
6883 breakpoints that are marked not-inserted, but should_be_inserted
6884 returns true on them.
6886 This behaviour is useful is situations close to tear-down -- e.g.,
6887 after an exec, while the target still has execution, but breakpoint
6888 shadows of the previous executable image should *NOT* be restored
6889 to the new image; or before detaching, where the target still has
6890 execution and wants to delete breakpoints from GDB's lists, and all
6891 breakpoints had already been removed from the inferior. */
6894 update_global_location_list (int should_insert
)
6896 struct breakpoint
*b
;
6897 struct bp_location
**next
= &bp_location_chain
;
6898 struct bp_location
*loc
;
6899 struct bp_location
*loc2
;
6900 VEC(bp_location_p
) *old_locations
= NULL
;
6903 struct cleanup
*cleanups
;
6905 cleanups
= make_cleanup (do_vec_free
, &old_locations
);
6906 /* Store old locations for future reference. */
6907 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
6908 VEC_safe_push (bp_location_p
, old_locations
, loc
);
6910 bp_location_chain
= NULL
;
6913 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
6916 next
= &(loc
->global_next
);
6921 /* Identify bp_location instances that are no longer present in the new
6922 list, and therefore should be freed. Note that it's not necessary that
6923 those locations should be removed from inferior -- if there's another
6924 location at the same address (previously marked as duplicate),
6925 we don't need to remove/insert the location. */
6926 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
6928 /* Tells if 'loc' is found amoung the new locations. If not, we
6930 int found_object
= 0;
6931 /* Tells if the location should remain inserted in the target. */
6932 int keep_in_target
= 0;
6934 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
6941 /* If this location is no longer present, and inserted, look if there's
6942 maybe a new location at the same address. If so, mark that one
6943 inserted, and don't remove this one. This is needed so that we
6944 don't have a time window where a breakpoint at certain location is not
6949 /* If the location is inserted now, we might have to remove it. */
6951 if (found_object
&& should_be_inserted (loc
))
6953 /* The location is still present in the location list, and still
6954 should be inserted. Don't do anything. */
6959 /* The location is either no longer present, or got disabled.
6960 See if there's another location at the same address, in which
6961 case we don't need to remove this one from the target. */
6962 if (breakpoint_address_is_meaningful (loc
->owner
))
6963 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
6965 /* For the sake of should_insert_location. The
6966 call to check_duplicates will fix up this later. */
6967 loc2
->duplicate
= 0;
6968 if (should_be_inserted (loc2
)
6969 && loc2
!= loc
&& loc2
->address
== loc
->address
)
6972 loc2
->target_info
= loc
->target_info
;
6979 if (!keep_in_target
)
6981 if (remove_breakpoint (loc
, mark_uninserted
))
6983 /* This is just about all we can do. We could keep this
6984 location on the global list, and try to remove it next
6985 time, but there's no particular reason why we will
6988 Note that at this point, loc->owner is still valid,
6989 as delete_breakpoint frees the breakpoint only
6990 after calling us. */
6991 printf_filtered (_("warning: Error removing breakpoint %d\n"),
6992 loc
->owner
->number
);
7000 if (removed
&& non_stop
)
7002 /* This location was removed from the targets. In non-stop mode,
7003 a race condition is possible where we've removed a breakpoint,
7004 but stop events for that breakpoint are already queued and will
7005 arrive later. To suppress spurious SIGTRAPs reported to user,
7006 we keep this breakpoint location for a bit, and will retire it
7007 after we see 3 * thread_count events.
7008 The theory here is that reporting of events should,
7009 "on the average", be fair, so after that many event we'll see
7010 events from all threads that have anything of interest, and no
7011 longer need to keep this breakpoint. This is just a
7012 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7013 which is usability issue, but not a correctness problem. */
7014 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7017 VEC_safe_push (bp_location_p
, moribund_locations
, loc
);
7020 free_bp_location (loc
);
7026 check_duplicates (b
);
7029 if (breakpoints_always_inserted_mode () && should_insert
7030 && (target_has_execution
7031 || (gdbarch_has_global_solist (target_gdbarch
)
7032 && target_supports_multi_process ())))
7033 insert_breakpoint_locations ();
7035 do_cleanups (cleanups
);
7039 breakpoint_retire_moribund (void)
7041 struct bp_location
*loc
;
7044 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7045 if (--(loc
->events_till_retirement
) == 0)
7047 free_bp_location (loc
);
7048 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7054 update_global_location_list_nothrow (int inserting
)
7056 struct gdb_exception e
;
7057 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7058 update_global_location_list (inserting
);
7061 /* Clear BPT from a BPS. */
7063 bpstat_remove_breakpoint (bpstat bps
, struct breakpoint
*bpt
)
7066 for (bs
= bps
; bs
; bs
= bs
->next
)
7067 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7069 bs
->breakpoint_at
= NULL
;
7071 /* bs->commands will be freed later. */
7075 /* Callback for iterate_over_threads. */
7077 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
7079 struct breakpoint
*bpt
= data
;
7080 bpstat_remove_breakpoint (th
->stop_bpstat
, bpt
);
7084 /* Delete a breakpoint and clean up all traces of it in the data
7088 delete_breakpoint (struct breakpoint
*bpt
)
7090 struct breakpoint
*b
;
7091 struct bp_location
*loc
, *next
;
7093 gdb_assert (bpt
!= NULL
);
7095 /* Has this bp already been deleted? This can happen because multiple
7096 lists can hold pointers to bp's. bpstat lists are especial culprits.
7098 One example of this happening is a watchpoint's scope bp. When the
7099 scope bp triggers, we notice that the watchpoint is out of scope, and
7100 delete it. We also delete its scope bp. But the scope bp is marked
7101 "auto-deleting", and is already on a bpstat. That bpstat is then
7102 checked for auto-deleting bp's, which are deleted.
7104 A real solution to this problem might involve reference counts in bp's,
7105 and/or giving them pointers back to their referencing bpstat's, and
7106 teaching delete_breakpoint to only free a bp's storage when no more
7107 references were extent. A cheaper bandaid was chosen. */
7108 if (bpt
->type
== bp_none
)
7111 observer_notify_breakpoint_deleted (bpt
->number
);
7113 if (breakpoint_chain
== bpt
)
7114 breakpoint_chain
= bpt
->next
;
7119 b
->next
= bpt
->next
;
7123 free_command_lines (&bpt
->commands
);
7124 if (bpt
->cond_string
!= NULL
)
7125 xfree (bpt
->cond_string
);
7126 if (bpt
->addr_string
!= NULL
)
7127 xfree (bpt
->addr_string
);
7128 if (bpt
->exp
!= NULL
)
7130 if (bpt
->exp_string
!= NULL
)
7131 xfree (bpt
->exp_string
);
7132 if (bpt
->val
!= NULL
)
7133 value_free (bpt
->val
);
7134 if (bpt
->source_file
!= NULL
)
7135 xfree (bpt
->source_file
);
7136 if (bpt
->exec_pathname
!= NULL
)
7137 xfree (bpt
->exec_pathname
);
7139 /* Be sure no bpstat's are pointing at it after it's been freed. */
7140 /* FIXME, how can we find all bpstat's?
7141 We just check stop_bpstat for now. Note that we cannot just
7142 remove bpstats pointing at bpt from the stop_bpstat list
7143 entirely, as breakpoint commands are associated with the bpstat;
7144 if we remove it here, then the later call to
7145 bpstat_do_actions (&stop_bpstat);
7146 in event-top.c won't do anything, and temporary breakpoints
7147 with commands won't work. */
7149 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
7151 /* Now that breakpoint is removed from breakpoint
7152 list, update the global location list. This
7153 will remove locations that used to belong to
7154 this breakpoint. Do this before freeing
7155 the breakpoint itself, since remove_breakpoint
7156 looks at location's owner. It might be better
7157 design to have location completely self-contained,
7158 but it's not the case now. */
7159 update_global_location_list (0);
7162 /* On the chance that someone will soon try again to delete this same
7163 bp, we mark it as deleted before freeing its storage. */
7164 bpt
->type
= bp_none
;
7170 do_delete_breakpoint_cleanup (void *b
)
7172 delete_breakpoint (b
);
7176 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7178 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7182 delete_command (char *arg
, int from_tty
)
7184 struct breakpoint
*b
, *temp
;
7190 int breaks_to_delete
= 0;
7192 /* Delete all breakpoints if no argument.
7193 Do not delete internal or call-dummy breakpoints, these
7194 have to be deleted with an explicit breakpoint number argument. */
7197 if (b
->type
!= bp_call_dummy
&&
7198 b
->type
!= bp_shlib_event
&&
7199 b
->type
!= bp_thread_event
&&
7200 b
->type
!= bp_overlay_event
&&
7203 breaks_to_delete
= 1;
7208 /* Ask user only if there are some breakpoints to delete. */
7210 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7212 ALL_BREAKPOINTS_SAFE (b
, temp
)
7214 if (b
->type
!= bp_call_dummy
&&
7215 b
->type
!= bp_shlib_event
&&
7216 b
->type
!= bp_thread_event
&&
7217 b
->type
!= bp_overlay_event
&&
7219 delete_breakpoint (b
);
7224 map_breakpoint_numbers (arg
, delete_breakpoint
);
7228 all_locations_are_pending (struct bp_location
*loc
)
7230 for (; loc
; loc
= loc
->next
)
7231 if (!loc
->shlib_disabled
)
7236 /* Subroutine of update_breakpoint_locations to simplify it.
7237 Return non-zero if multiple fns in list LOC have the same name.
7238 Null names are ignored. */
7241 ambiguous_names_p (struct bp_location
*loc
)
7243 struct bp_location
*l
;
7244 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7245 (int (*) (const void *, const void *)) streq
,
7246 NULL
, xcalloc
, xfree
);
7248 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7251 const char *name
= l
->function_name
;
7253 /* Allow for some names to be NULL, ignore them. */
7257 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7259 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7274 update_breakpoint_locations (struct breakpoint
*b
,
7275 struct symtabs_and_lines sals
)
7279 struct bp_location
*existing_locations
= b
->loc
;
7281 /* If there's no new locations, and all existing locations
7282 are pending, don't do anything. This optimizes
7283 the common case where all locations are in the same
7284 shared library, that was unloaded. We'd like to
7285 retain the location, so that when the library
7286 is loaded again, we don't loose the enabled/disabled
7287 status of the individual locations. */
7288 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7293 for (i
= 0; i
< sals
.nelts
; ++i
)
7295 struct bp_location
*new_loc
=
7296 add_location_to_breakpoint (b
, &(sals
.sals
[i
]));
7298 /* Reparse conditions, they might contain references to the
7300 if (b
->cond_string
!= NULL
)
7302 struct gdb_exception e
;
7305 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7307 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7312 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7313 b
->number
, e
.message
);
7314 new_loc
->enabled
= 0;
7318 if (b
->source_file
!= NULL
)
7319 xfree (b
->source_file
);
7320 if (sals
.sals
[i
].symtab
== NULL
)
7321 b
->source_file
= NULL
;
7324 savestring (sals
.sals
[i
].symtab
->filename
,
7325 strlen (sals
.sals
[i
].symtab
->filename
));
7327 if (b
->line_number
== 0)
7328 b
->line_number
= sals
.sals
[i
].line
;
7331 /* Update locations of permanent breakpoints. */
7332 if (b
->enable_state
== bp_permanent
)
7333 make_breakpoint_permanent (b
);
7335 /* If possible, carry over 'disable' status from existing breakpoints. */
7337 struct bp_location
*e
= existing_locations
;
7338 /* If there are multiple breakpoints with the same function name,
7339 e.g. for inline functions, comparing function names won't work.
7340 Instead compare pc addresses; this is just a heuristic as things
7341 may have moved, but in practice it gives the correct answer
7342 often enough until a better solution is found. */
7343 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7345 for (; e
; e
= e
->next
)
7347 if (!e
->enabled
&& e
->function_name
)
7349 struct bp_location
*l
= b
->loc
;
7350 if (have_ambiguous_names
)
7352 for (; l
; l
= l
->next
)
7353 if (e
->address
== l
->address
)
7361 for (; l
; l
= l
->next
)
7362 if (l
->function_name
7363 && strcmp (e
->function_name
, l
->function_name
) == 0)
7373 update_global_location_list (1);
7377 /* Reset a breakpoint given it's struct breakpoint * BINT.
7378 The value we return ends up being the return value from catch_errors.
7379 Unused in this case. */
7382 breakpoint_re_set_one (void *bint
)
7384 /* get past catch_errs */
7385 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7389 int *not_found_ptr
= ¬_found
;
7390 struct symtabs_and_lines sals
= {};
7391 struct symtabs_and_lines expanded
;
7393 enum enable_state save_enable
;
7394 struct gdb_exception e
;
7395 struct cleanup
*cleanups
;
7400 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7404 case bp_hardware_breakpoint
:
7405 if (b
->addr_string
== NULL
)
7407 /* Anything without a string can't be re-set. */
7408 delete_breakpoint (b
);
7412 set_language (b
->language
);
7413 input_radix
= b
->input_radix
;
7415 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7417 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7422 int not_found_and_ok
= 0;
7423 /* For pending breakpoints, it's expected that parsing
7424 will fail until the right shared library is loaded.
7425 User has already told to create pending breakpoints and
7426 don't need extra messages. If breakpoint is in bp_shlib_disabled
7427 state, then user already saw the message about that breakpoint
7428 being disabled, and don't want to see more errors. */
7430 && (b
->condition_not_parsed
7431 || (b
->loc
&& b
->loc
->shlib_disabled
)
7432 || b
->enable_state
== bp_disabled
))
7433 not_found_and_ok
= 1;
7435 if (!not_found_and_ok
)
7437 /* We surely don't want to warn about the same breakpoint
7438 10 times. One solution, implemented here, is disable
7439 the breakpoint on error. Another solution would be to
7440 have separate 'warning emitted' flag. Since this
7441 happens only when a binary has changed, I don't know
7442 which approach is better. */
7443 b
->enable_state
= bp_disabled
;
7444 throw_exception (e
);
7451 gdb_assert (sals
.nelts
== 1);
7452 resolve_sal_pc (&sals
.sals
[0]);
7453 if (b
->condition_not_parsed
&& s
&& s
[0])
7455 char *cond_string
= 0;
7457 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7458 &cond_string
, &thread
);
7460 b
->cond_string
= cond_string
;
7462 b
->condition_not_parsed
= 0;
7464 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7465 cleanups
= make_cleanup (xfree
, sals
.sals
);
7466 update_breakpoint_locations (b
, expanded
);
7467 do_cleanups (cleanups
);
7471 case bp_hardware_watchpoint
:
7472 case bp_read_watchpoint
:
7473 case bp_access_watchpoint
:
7474 /* Watchpoint can be either on expression using entirely global variables,
7475 or it can be on local variables.
7477 Watchpoints of the first kind are never auto-deleted, and even persist
7478 across program restarts. Since they can use variables from shared
7479 libraries, we need to reparse expression as libraries are loaded
7482 Watchpoints on local variables can also change meaning as result
7483 of solib event. For example, if a watchpoint uses both a local and
7484 a global variables in expression, it's a local watchpoint, but
7485 unloading of a shared library will make the expression invalid.
7486 This is not a very common use case, but we still re-evaluate
7487 expression, to avoid surprises to the user.
7489 Note that for local watchpoints, we re-evaluate it only if
7490 watchpoints frame id is still valid. If it's not, it means
7491 the watchpoint is out of scope and will be deleted soon. In fact,
7492 I'm not sure we'll ever be called in this case.
7494 If a local watchpoint's frame id is still valid, then
7495 b->exp_valid_block is likewise valid, and we can safely use it.
7497 Don't do anything about disabled watchpoints, since they will
7498 be reevaluated again when enabled. */
7499 update_watchpoint (b
, 1 /* reparse */);
7501 /* We needn't really do anything to reset these, since the mask
7502 that requests them is unaffected by e.g., new libraries being
7508 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7510 /* Delete overlay event breakpoints; they will be reset later by
7511 breakpoint_re_set. */
7512 case bp_overlay_event
:
7513 delete_breakpoint (b
);
7516 /* This breakpoint is special, it's set up when the inferior
7517 starts and we really don't want to touch it. */
7518 case bp_shlib_event
:
7520 /* Like bp_shlib_event, this breakpoint type is special.
7521 Once it is set up, we do not want to touch it. */
7522 case bp_thread_event
:
7524 /* Keep temporary breakpoints, which can be encountered when we step
7525 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7526 Otherwise these should have been blown away via the cleanup chain
7527 or by breakpoint_init_inferior when we rerun the executable. */
7530 case bp_watchpoint_scope
:
7532 case bp_step_resume
:
7534 case bp_longjmp_resume
:
7541 /* Re-set all breakpoints after symbols have been re-loaded. */
7543 breakpoint_re_set (void)
7545 struct breakpoint
*b
, *temp
;
7546 enum language save_language
;
7547 int save_input_radix
;
7549 save_language
= current_language
->la_language
;
7550 save_input_radix
= input_radix
;
7551 ALL_BREAKPOINTS_SAFE (b
, temp
)
7553 /* Format possible error msg */
7554 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7556 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7557 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7558 do_cleanups (cleanups
);
7560 set_language (save_language
);
7561 input_radix
= save_input_radix
;
7563 create_overlay_event_breakpoint ("_ovly_debug_event");
7566 /* Reset the thread number of this breakpoint:
7568 - If the breakpoint is for all threads, leave it as-is.
7569 - Else, reset it to the current thread for inferior_ptid. */
7571 breakpoint_re_set_thread (struct breakpoint
*b
)
7573 if (b
->thread
!= -1)
7575 if (in_thread_list (inferior_ptid
))
7576 b
->thread
= pid_to_thread_id (inferior_ptid
);
7580 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7581 If from_tty is nonzero, it prints a message to that effect,
7582 which ends with a period (no newline). */
7585 set_ignore_count (int bptnum
, int count
, int from_tty
)
7587 struct breakpoint
*b
;
7593 if (b
->number
== bptnum
)
7595 b
->ignore_count
= count
;
7599 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7601 else if (count
== 1)
7602 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7605 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7608 breakpoints_changed ();
7609 observer_notify_breakpoint_modified (b
->number
);
7613 error (_("No breakpoint number %d."), bptnum
);
7617 make_breakpoint_silent (struct breakpoint
*b
)
7619 /* Silence the breakpoint. */
7623 /* Command to set ignore-count of breakpoint N to COUNT. */
7626 ignore_command (char *args
, int from_tty
)
7632 error_no_arg (_("a breakpoint number"));
7634 num
= get_number (&p
);
7636 error (_("bad breakpoint number: '%s'"), args
);
7638 error (_("Second argument (specified ignore-count) is missing."));
7640 set_ignore_count (num
,
7641 longest_to_int (value_as_long (parse_and_eval (p
))),
7644 printf_filtered ("\n");
7647 /* Call FUNCTION on each of the breakpoints
7648 whose numbers are given in ARGS. */
7651 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7656 struct breakpoint
*b
, *tmp
;
7660 error_no_arg (_("one or more breakpoint numbers"));
7667 num
= get_number_or_range (&p1
);
7670 warning (_("bad breakpoint number at or near '%s'"), p
);
7674 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7675 if (b
->number
== num
)
7677 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7680 if (related_breakpoint
)
7681 function (related_breakpoint
);
7685 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7691 static struct bp_location
*
7692 find_location_by_number (char *number
)
7694 char *dot
= strchr (number
, '.');
7698 struct breakpoint
*b
;
7699 struct bp_location
*loc
;
7704 bp_num
= get_number_or_range (&p1
);
7706 error (_("Bad breakpoint number '%s'"), number
);
7709 if (b
->number
== bp_num
)
7714 if (!b
|| b
->number
!= bp_num
)
7715 error (_("Bad breakpoint number '%s'"), number
);
7718 loc_num
= get_number_or_range (&p1
);
7720 error (_("Bad breakpoint location number '%s'"), number
);
7724 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7727 error (_("Bad breakpoint location number '%s'"), dot
+1);
7733 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7734 If from_tty is nonzero, it prints a message to that effect,
7735 which ends with a period (no newline). */
7738 disable_breakpoint (struct breakpoint
*bpt
)
7740 /* Never disable a watchpoint scope breakpoint; we want to
7741 hit them when we leave scope so we can delete both the
7742 watchpoint and its scope breakpoint at that time. */
7743 if (bpt
->type
== bp_watchpoint_scope
)
7746 /* You can't disable permanent breakpoints. */
7747 if (bpt
->enable_state
== bp_permanent
)
7750 bpt
->enable_state
= bp_disabled
;
7752 update_global_location_list (0);
7754 observer_notify_breakpoint_modified (bpt
->number
);
7758 disable_command (char *args
, int from_tty
)
7760 struct breakpoint
*bpt
;
7762 ALL_BREAKPOINTS (bpt
)
7766 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7771 case bp_hardware_breakpoint
:
7773 case bp_hardware_watchpoint
:
7774 case bp_read_watchpoint
:
7775 case bp_access_watchpoint
:
7776 disable_breakpoint (bpt
);
7780 else if (strchr (args
, '.'))
7782 struct bp_location
*loc
= find_location_by_number (args
);
7785 update_global_location_list (0);
7788 map_breakpoint_numbers (args
, disable_breakpoint
);
7792 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7794 int target_resources_ok
, other_type_used
;
7797 if (bpt
->type
== bp_hardware_breakpoint
)
7800 i
= hw_breakpoint_used_count ();
7801 target_resources_ok
=
7802 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7804 if (target_resources_ok
== 0)
7805 error (_("No hardware breakpoint support in the target."));
7806 else if (target_resources_ok
< 0)
7807 error (_("Hardware breakpoints used exceeds limit."));
7810 if (bpt
->type
== bp_watchpoint
||
7811 bpt
->type
== bp_hardware_watchpoint
||
7812 bpt
->type
== bp_read_watchpoint
||
7813 bpt
->type
== bp_access_watchpoint
)
7815 struct gdb_exception e
;
7817 TRY_CATCH (e
, RETURN_MASK_ALL
)
7819 update_watchpoint (bpt
, 1 /* reparse */);
7823 exception_fprintf (gdb_stderr
, e
, _("Cannot enable watchpoint %d: "),
7829 if (bpt
->enable_state
!= bp_permanent
)
7830 bpt
->enable_state
= bp_enabled
;
7831 bpt
->disposition
= disposition
;
7832 update_global_location_list (1);
7833 breakpoints_changed ();
7835 observer_notify_breakpoint_modified (bpt
->number
);
7840 enable_breakpoint (struct breakpoint
*bpt
)
7842 do_enable_breakpoint (bpt
, bpt
->disposition
);
7845 /* The enable command enables the specified breakpoints (or all defined
7846 breakpoints) so they once again become (or continue to be) effective
7847 in stopping the inferior. */
7850 enable_command (char *args
, int from_tty
)
7852 struct breakpoint
*bpt
;
7854 ALL_BREAKPOINTS (bpt
)
7858 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7863 case bp_hardware_breakpoint
:
7865 case bp_hardware_watchpoint
:
7866 case bp_read_watchpoint
:
7867 case bp_access_watchpoint
:
7868 enable_breakpoint (bpt
);
7872 else if (strchr (args
, '.'))
7874 struct bp_location
*loc
= find_location_by_number (args
);
7877 update_global_location_list (1);
7880 map_breakpoint_numbers (args
, enable_breakpoint
);
7884 enable_once_breakpoint (struct breakpoint
*bpt
)
7886 do_enable_breakpoint (bpt
, disp_disable
);
7890 enable_once_command (char *args
, int from_tty
)
7892 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7896 enable_delete_breakpoint (struct breakpoint
*bpt
)
7898 do_enable_breakpoint (bpt
, disp_del
);
7902 enable_delete_command (char *args
, int from_tty
)
7904 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7908 set_breakpoint_cmd (char *args
, int from_tty
)
7913 show_breakpoint_cmd (char *args
, int from_tty
)
7917 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7919 struct symtabs_and_lines
7920 decode_line_spec_1 (char *string
, int funfirstline
)
7922 struct symtabs_and_lines sals
;
7924 error (_("Empty line specification."));
7925 if (default_breakpoint_valid
)
7926 sals
= decode_line_1 (&string
, funfirstline
,
7927 default_breakpoint_symtab
,
7928 default_breakpoint_line
,
7929 (char ***) NULL
, NULL
);
7931 sals
= decode_line_1 (&string
, funfirstline
,
7932 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7934 error (_("Junk at end of line specification: %s"), string
);
7938 /* Create and insert a raw software breakpoint at PC. Return an
7939 identifier, which should be used to remove the breakpoint later.
7940 In general, places which call this should be using something on the
7941 breakpoint chain instead; this function should be eliminated
7945 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
7947 struct bp_target_info
*bp_tgt
;
7949 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
7950 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
7952 bp_tgt
->placed_address
= pc
;
7953 if (target_insert_breakpoint (bp_tgt
) != 0)
7955 /* Could not insert the breakpoint. */
7963 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
7966 deprecated_remove_raw_breakpoint (void *bp
)
7968 struct bp_target_info
*bp_tgt
= bp
;
7971 ret
= target_remove_breakpoint (bp_tgt
);
7977 /* One (or perhaps two) breakpoints used for software single stepping. */
7979 static void *single_step_breakpoints
[2];
7981 /* Create and insert a breakpoint for software single step. */
7984 insert_single_step_breakpoint (CORE_ADDR next_pc
)
7988 if (single_step_breakpoints
[0] == NULL
)
7989 bpt_p
= &single_step_breakpoints
[0];
7992 gdb_assert (single_step_breakpoints
[1] == NULL
);
7993 bpt_p
= &single_step_breakpoints
[1];
7996 /* NOTE drow/2006-04-11: A future improvement to this function would be
7997 to only create the breakpoints once, and actually put them on the
7998 breakpoint chain. That would let us use set_raw_breakpoint. We could
7999 adjust the addresses each time they were needed. Doing this requires
8000 corresponding changes elsewhere where single step breakpoints are
8001 handled, however. So, for now, we use this. */
8003 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
8005 error (_("Could not insert single-step breakpoint at 0x%s"),
8006 paddr_nz (next_pc
));
8009 /* Remove and delete any breakpoints used for software single step. */
8012 remove_single_step_breakpoints (void)
8014 gdb_assert (single_step_breakpoints
[0] != NULL
);
8016 /* See insert_single_step_breakpoint for more about this deprecated
8018 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8019 single_step_breakpoints
[0] = NULL
;
8021 if (single_step_breakpoints
[1] != NULL
)
8023 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8024 single_step_breakpoints
[1] = NULL
;
8028 /* Check whether a software single-step breakpoint is inserted at PC. */
8031 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8035 for (i
= 0; i
< 2; i
++)
8037 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8038 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8046 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8047 It is defined as a macro to prevent duplication.
8048 COMMAND should be a string constant containing the name of the command. */
8049 #define BREAK_ARGS_HELP(command) \
8050 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8051 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8052 If a line number is specified, break at start of code for that line.\n\
8053 If a function is specified, break at start of code for that function.\n\
8054 If an address is specified, break at that exact address.\n\
8055 With no LOCATION, uses current execution address of selected stack frame.\n\
8056 This is useful for breaking on return to a stack frame.\n\
8058 THREADNUM is the number from \"info threads\".\n\
8059 CONDITION is a boolean expression.\n\
8061 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8063 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8065 /* List of subcommands for "catch". */
8066 static struct cmd_list_element
*catch_cmdlist
;
8068 /* List of subcommands for "tcatch". */
8069 static struct cmd_list_element
*tcatch_cmdlist
;
8071 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
8072 lists, and pass some additional user data to the command function. */
8074 add_catch_command (char *name
, char *docstring
,
8075 void (*sfunc
) (char *args
, int from_tty
,
8076 struct cmd_list_element
*command
),
8077 void *user_data_catch
,
8078 void *user_data_tcatch
)
8080 struct cmd_list_element
*command
;
8082 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8084 set_cmd_sfunc (command
, sfunc
);
8085 set_cmd_context (command
, user_data_catch
);
8087 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8089 set_cmd_sfunc (command
, sfunc
);
8090 set_cmd_context (command
, user_data_tcatch
);
8094 _initialize_breakpoint (void)
8096 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8097 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8098 struct cmd_list_element
*c
;
8100 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8102 breakpoint_chain
= 0;
8103 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8104 before a breakpoint is set. */
8105 breakpoint_count
= 0;
8107 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8108 Set ignore-count of breakpoint number N to COUNT.\n\
8109 Usage is `ignore N COUNT'."));
8111 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8113 add_com ("commands", class_breakpoint
, commands_command
, _("\
8114 Set commands to be executed when a breakpoint is hit.\n\
8115 Give breakpoint number as argument after \"commands\".\n\
8116 With no argument, the targeted breakpoint is the last one set.\n\
8117 The commands themselves follow starting on the next line.\n\
8118 Type a line containing \"end\" to indicate the end of them.\n\
8119 Give \"silent\" as the first line to make the breakpoint silent;\n\
8120 then no output is printed when it is hit, except what the commands print."));
8122 add_com ("condition", class_breakpoint
, condition_command
, _("\
8123 Specify breakpoint number N to break only if COND is true.\n\
8124 Usage is `condition N COND', where N is an integer and COND is an\n\
8125 expression to be evaluated whenever breakpoint N is reached."));
8127 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8128 Set a temporary breakpoint.\n\
8129 Like \"break\" except the breakpoint is only temporary,\n\
8130 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8131 by using \"enable delete\" on the breakpoint number.\n\
8133 BREAK_ARGS_HELP ("tbreak")));
8134 set_cmd_completer (c
, location_completer
);
8136 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8137 Set a hardware assisted breakpoint.\n\
8138 Like \"break\" except the breakpoint requires hardware support,\n\
8139 some target hardware may not have this support.\n\
8141 BREAK_ARGS_HELP ("hbreak")));
8142 set_cmd_completer (c
, location_completer
);
8144 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8145 Set a temporary hardware assisted breakpoint.\n\
8146 Like \"hbreak\" except the breakpoint is only temporary,\n\
8147 so it will be deleted when hit.\n\
8149 BREAK_ARGS_HELP ("thbreak")));
8150 set_cmd_completer (c
, location_completer
);
8152 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8153 Enable some breakpoints.\n\
8154 Give breakpoint numbers (separated by spaces) as arguments.\n\
8155 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8156 This is used to cancel the effect of the \"disable\" command.\n\
8157 With a subcommand you can enable temporarily."),
8158 &enablelist
, "enable ", 1, &cmdlist
);
8160 add_com ("ab", class_breakpoint
, enable_command
, _("\
8161 Enable some breakpoints.\n\
8162 Give breakpoint numbers (separated by spaces) as arguments.\n\
8163 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8164 This is used to cancel the effect of the \"disable\" command.\n\
8165 With a subcommand you can enable temporarily."));
8167 add_com_alias ("en", "enable", class_breakpoint
, 1);
8169 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8170 Enable some breakpoints.\n\
8171 Give breakpoint numbers (separated by spaces) as arguments.\n\
8172 This is used to cancel the effect of the \"disable\" command.\n\
8173 May be abbreviated to simply \"enable\".\n"),
8174 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8176 add_cmd ("once", no_class
, enable_once_command
, _("\
8177 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8178 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8181 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8182 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8183 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8186 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8187 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8188 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8191 add_cmd ("once", no_class
, enable_once_command
, _("\
8192 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8193 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8196 add_prefix_cmd ("disable", 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."),
8201 &disablelist
, "disable ", 1, &cmdlist
);
8202 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8203 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8205 add_com ("sb", class_breakpoint
, disable_command
, _("\
8206 Disable some breakpoints.\n\
8207 Arguments are breakpoint numbers with spaces in between.\n\
8208 To disable all breakpoints, give no argument.\n\
8209 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8211 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8212 Disable some breakpoints.\n\
8213 Arguments are breakpoint numbers with spaces in between.\n\
8214 To disable all breakpoints, give no argument.\n\
8215 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8216 This command may be abbreviated \"disable\"."),
8219 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8220 Delete some breakpoints or auto-display expressions.\n\
8221 Arguments are breakpoint numbers with spaces in between.\n\
8222 To delete all breakpoints, give no argument.\n\
8224 Also a prefix command for deletion of other GDB objects.\n\
8225 The \"unset\" command is also an alias for \"delete\"."),
8226 &deletelist
, "delete ", 1, &cmdlist
);
8227 add_com_alias ("d", "delete", class_breakpoint
, 1);
8228 add_com_alias ("del", "delete", class_breakpoint
, 1);
8230 add_com ("db", class_breakpoint
, delete_command
, _("\
8231 Delete some breakpoints.\n\
8232 Arguments are breakpoint numbers with spaces in between.\n\
8233 To delete all breakpoints, give no argument.\n"));
8235 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8236 Delete some breakpoints or auto-display expressions.\n\
8237 Arguments are breakpoint numbers with spaces in between.\n\
8238 To delete all breakpoints, give no argument.\n\
8239 This command may be abbreviated \"delete\"."),
8242 add_com ("clear", class_breakpoint
, clear_command
, _("\
8243 Clear breakpoint at specified line or function.\n\
8244 Argument may be line number, function name, or \"*\" and an address.\n\
8245 If line number is specified, all breakpoints in that line are cleared.\n\
8246 If function is specified, breakpoints at beginning of function are cleared.\n\
8247 If an address is specified, breakpoints at that address are cleared.\n\
8249 With no argument, clears all breakpoints in the line that the selected frame\n\
8252 See also the \"delete\" command which clears breakpoints by number."));
8254 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8255 Set breakpoint at specified line or function.\n"
8256 BREAK_ARGS_HELP ("break")));
8257 set_cmd_completer (c
, location_completer
);
8259 add_com_alias ("b", "break", class_run
, 1);
8260 add_com_alias ("br", "break", class_run
, 1);
8261 add_com_alias ("bre", "break", class_run
, 1);
8262 add_com_alias ("brea", "break", class_run
, 1);
8266 add_com_alias ("ba", "break", class_breakpoint
, 1);
8267 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8272 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8273 Break in function/address or break at a line in the current file."),
8274 &stoplist
, "stop ", 1, &cmdlist
);
8275 add_cmd ("in", class_breakpoint
, stopin_command
,
8276 _("Break in function or address."), &stoplist
);
8277 add_cmd ("at", class_breakpoint
, stopat_command
,
8278 _("Break at a line in the current file."), &stoplist
);
8279 add_com ("status", class_info
, breakpoints_info
, _("\
8280 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8281 The \"Type\" column indicates one of:\n\
8282 \tbreakpoint - normal breakpoint\n\
8283 \twatchpoint - watchpoint\n\
8284 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8285 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8286 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8287 address and file/line number respectively.\n\
8289 Convenience variable \"$_\" and default examine address for \"x\"\n\
8290 are set to the address of the last breakpoint listed unless the command\n\
8291 is prefixed with \"server \".\n\n\
8292 Convenience variable \"$bpnum\" contains the number of the last\n\
8296 add_info ("breakpoints", breakpoints_info
, _("\
8297 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8298 The \"Type\" column indicates one of:\n\
8299 \tbreakpoint - normal breakpoint\n\
8300 \twatchpoint - watchpoint\n\
8301 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8302 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8303 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8304 address and file/line number respectively.\n\
8306 Convenience variable \"$_\" and default examine address for \"x\"\n\
8307 are set to the address of the last breakpoint listed unless the command\n\
8308 is prefixed with \"server \".\n\n\
8309 Convenience variable \"$bpnum\" contains the number of the last\n\
8313 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8314 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8315 The \"Type\" column indicates one of:\n\
8316 \tbreakpoint - normal breakpoint\n\
8317 \twatchpoint - watchpoint\n\
8318 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8319 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8320 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8321 address and file/line number respectively.\n\
8323 Convenience variable \"$_\" and default examine address for \"x\"\n\
8324 are set to the address of the last breakpoint listed unless the command\n\
8325 is prefixed with \"server \".\n\n\
8326 Convenience variable \"$bpnum\" contains the number of the last\n\
8329 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8330 Status of all breakpoints, or breakpoint number NUMBER.\n\
8331 The \"Type\" column indicates one of:\n\
8332 \tbreakpoint - normal breakpoint\n\
8333 \twatchpoint - watchpoint\n\
8334 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8335 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8336 \tuntil - internal breakpoint used by the \"until\" command\n\
8337 \tfinish - internal breakpoint used by the \"finish\" command\n\
8338 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8339 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8340 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8341 address and file/line number respectively.\n\
8343 Convenience variable \"$_\" and default examine address for \"x\"\n\
8344 are set to the address of the last breakpoint listed unless the command\n\
8345 is prefixed with \"server \".\n\n\
8346 Convenience variable \"$bpnum\" contains the number of the last\n\
8348 &maintenanceinfolist
);
8350 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
8351 Set catchpoints to catch events."),
8352 &catch_cmdlist
, "catch ",
8353 0/*allow-unknown*/, &cmdlist
);
8355 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
8356 Set temporary catchpoints to catch events."),
8357 &tcatch_cmdlist
, "tcatch ",
8358 0/*allow-unknown*/, &cmdlist
);
8360 /* Add catch and tcatch sub-commands. */
8361 add_catch_command ("catch", _("\
8362 Catch an exception, when caught.\n\
8363 With an argument, catch only exceptions with the given name."),
8364 catch_catch_command
,
8367 add_catch_command ("throw", _("\
8368 Catch an exception, when thrown.\n\
8369 With an argument, catch only exceptions with the given name."),
8370 catch_throw_command
,
8373 add_catch_command ("fork", _("Catch calls to fork."),
8374 catch_fork_command_1
,
8375 (void *) (uintptr_t) catch_fork_permanent
,
8376 (void *) (uintptr_t) catch_fork_temporary
);
8377 add_catch_command ("vfork", _("Catch calls to vfork."),
8378 catch_fork_command_1
,
8379 (void *) (uintptr_t) catch_vfork_permanent
,
8380 (void *) (uintptr_t) catch_vfork_temporary
);
8381 add_catch_command ("exec", _("Catch calls to exec."),
8382 catch_exec_command_1
,
8385 add_catch_command ("exception", _("\
8386 Catch Ada exceptions, when raised.\n\
8387 With an argument, catch only exceptions with the given name."),
8388 catch_ada_exception_command
,
8391 add_catch_command ("assert", _("\
8392 Catch failed Ada assertions, when raised.\n\
8393 With an argument, catch only exceptions with the given name."),
8394 catch_assert_command
,
8398 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8399 Set a watchpoint for an expression.\n\
8400 A watchpoint stops execution of your program whenever the value of\n\
8401 an expression changes."));
8402 set_cmd_completer (c
, expression_completer
);
8404 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8405 Set a read watchpoint for an expression.\n\
8406 A watchpoint stops execution of your program whenever the value of\n\
8407 an expression is read."));
8408 set_cmd_completer (c
, expression_completer
);
8410 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8411 Set a watchpoint for an expression.\n\
8412 A watchpoint stops execution of your program whenever the value of\n\
8413 an expression is either read or written."));
8414 set_cmd_completer (c
, expression_completer
);
8416 add_info ("watchpoints", breakpoints_info
,
8417 _("Synonym for ``info breakpoints''."));
8420 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8421 respond to changes - contrary to the description. */
8422 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8423 &can_use_hw_watchpoints
, _("\
8424 Set debugger's willingness to use watchpoint hardware."), _("\
8425 Show debugger's willingness to use watchpoint hardware."), _("\
8426 If zero, gdb will not use hardware for new watchpoints, even if\n\
8427 such is available. (However, any hardware watchpoints that were\n\
8428 created before setting this to nonzero, will continue to use watchpoint\n\
8431 show_can_use_hw_watchpoints
,
8432 &setlist
, &showlist
);
8434 can_use_hw_watchpoints
= 1;
8436 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8437 Breakpoint specific settings\n\
8438 Configure various breakpoint-specific variables such as\n\
8439 pending breakpoint behavior"),
8440 &breakpoint_set_cmdlist
, "set breakpoint ",
8441 0/*allow-unknown*/, &setlist
);
8442 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8443 Breakpoint specific settings\n\
8444 Configure various breakpoint-specific variables such as\n\
8445 pending breakpoint behavior"),
8446 &breakpoint_show_cmdlist
, "show breakpoint ",
8447 0/*allow-unknown*/, &showlist
);
8449 add_setshow_auto_boolean_cmd ("pending", no_class
,
8450 &pending_break_support
, _("\
8451 Set debugger's behavior regarding pending breakpoints."), _("\
8452 Show debugger's behavior regarding pending breakpoints."), _("\
8453 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8454 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8455 an error. If auto, an unrecognized breakpoint location results in a\n\
8456 user-query to see if a pending breakpoint should be created."),
8458 show_pending_break_support
,
8459 &breakpoint_set_cmdlist
,
8460 &breakpoint_show_cmdlist
);
8462 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8464 add_setshow_boolean_cmd ("auto-hw", no_class
,
8465 &automatic_hardware_breakpoints
, _("\
8466 Set automatic usage of hardware breakpoints."), _("\
8467 Show automatic usage of hardware breakpoints."), _("\
8468 If set, the debugger will automatically use hardware breakpoints for\n\
8469 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8470 a warning will be emitted for such breakpoints."),
8472 show_automatic_hardware_breakpoints
,
8473 &breakpoint_set_cmdlist
,
8474 &breakpoint_show_cmdlist
);
8476 add_setshow_enum_cmd ("always-inserted", class_support
,
8477 always_inserted_enums
, &always_inserted_mode
, _("\
8478 Set mode for inserting breakpoints."), _("\
8479 Show mode for inserting breakpoints."), _("\
8480 When this mode is off, breakpoints are inserted in inferior when it is\n\
8481 resumed, and removed when execution stops. When this mode is on,\n\
8482 breakpoints are inserted immediately and removed only when the user\n\
8483 deletes the breakpoint. When this mode is auto (which is the default),\n\
8484 the behaviour depends on the non-stop setting (see help set non-stop).\n\
8485 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
8486 behaves as if always-inserted mode is on; if gdb is controlling the\n\
8487 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
8489 &show_always_inserted_mode
,
8490 &breakpoint_set_cmdlist
,
8491 &breakpoint_show_cmdlist
);
8493 automatic_hardware_breakpoints
= 1;