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 /* We use value_mark and value_free_to_mark because it could
2886 be a long time before we return to the command level and
2887 call free_all_values. We can't call free_all_values
2888 because we might be in the middle of evaluating a
2890 struct value
*mark
= value_mark ();
2892 /* Need to select the frame, with all that implies
2893 so that the conditions will have the right context. */
2894 select_frame (get_current_frame ());
2896 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
2897 "Error in testing breakpoint condition:\n",
2899 /* FIXME-someday, should give breakpoint # */
2900 value_free_to_mark (mark
);
2902 if (bl
->cond
&& value_is_zero
)
2906 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2910 else if (b
->ignore_count
> 0)
2913 annotate_ignore_count_change ();
2915 /* Increase the hit count even though we don't
2923 /* Get a bpstat associated with having just stopped at address
2924 BP_ADDR in thread PTID.
2926 Determine whether we stopped at a breakpoint, etc, or whether we
2927 don't understand this stop. Result is a chain of bpstat's such that:
2929 if we don't understand the stop, the result is a null pointer.
2931 if we understand why we stopped, the result is not null.
2933 Each element of the chain refers to a particular breakpoint or
2934 watchpoint at which we have stopped. (We may have stopped for
2935 several reasons concurrently.)
2937 Each element of the chain has valid next, breakpoint_at,
2938 commands, FIXME??? fields. */
2941 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
2943 struct breakpoint
*b
= NULL
;
2944 const struct bp_location
*bl
;
2945 struct bp_location
*loc
;
2946 /* Root of the chain of bpstat's */
2947 struct bpstats root_bs
[1];
2948 /* Pointer to the last thing in the chain currently. */
2949 bpstat bs
= root_bs
;
2951 int need_remove_insert
;
2953 ALL_BP_LOCATIONS (bl
)
2957 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2960 /* For hardware watchpoints, we look only at the first location.
2961 The watchpoint_check function will work on entire expression,
2962 not the individual locations. For read watchopints, the
2963 watchpoints_triggered function have checked all locations
2966 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
2969 if (!bpstat_check_location (bl
, bp_addr
))
2972 /* Come here if it's a watchpoint, or if the break address matches */
2974 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
2976 /* Assume we stop. Should we find watchpoint that is not actually
2977 triggered, or if condition of breakpoint is false, we'll reset
2982 bpstat_check_watchpoint (bs
);
2986 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
2987 /* We do not stop for these. */
2990 bpstat_check_breakpoint_conditions (bs
, ptid
);
2996 /* We will stop here */
2997 if (b
->disposition
== disp_disable
)
2999 if (b
->enable_state
!= bp_permanent
)
3000 b
->enable_state
= bp_disabled
;
3001 update_global_location_list (0);
3005 bs
->commands
= b
->commands
;
3007 (strcmp ("silent", bs
->commands
->line
) == 0
3008 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3010 bs
->commands
= bs
->commands
->next
;
3013 bs
->commands
= copy_command_lines (bs
->commands
);
3016 /* Print nothing for this entry if we dont stop or if we dont print. */
3017 if (bs
->stop
== 0 || bs
->print
== 0)
3018 bs
->print_it
= print_it_noop
;
3021 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
3023 if (loc
->address
== bp_addr
)
3025 bs
= bpstat_alloc (loc
, bs
);
3026 /* For hits of moribund locations, we should just proceed. */
3029 bs
->print_it
= print_it_noop
;
3033 bs
->next
= NULL
; /* Terminate the chain */
3034 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3036 /* If we aren't stopping, the value of some hardware watchpoint may
3037 not have changed, but the intermediate memory locations we are
3038 watching may have. Don't bother if we're stopping; this will get
3040 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3044 need_remove_insert
= 0;
3046 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3048 && bs
->breakpoint_at
->owner
3049 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3050 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3051 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3053 /* remove/insert can invalidate bs->breakpoint_at, if this
3054 location is no longer used by the watchpoint. Prevent
3055 further code from trying to use it. */
3056 bs
->breakpoint_at
= NULL
;
3057 need_remove_insert
= 1;
3060 if (need_remove_insert
)
3062 remove_breakpoints ();
3063 insert_breakpoints ();
3066 return root_bs
->next
;
3069 /* Tell what to do about this bpstat. */
3071 bpstat_what (bpstat bs
)
3073 /* Classify each bpstat as one of the following. */
3076 /* This bpstat element has no effect on the main_action. */
3079 /* There was a watchpoint, stop but don't print. */
3082 /* There was a watchpoint, stop and print. */
3085 /* There was a breakpoint but we're not stopping. */
3088 /* There was a breakpoint, stop but don't print. */
3091 /* There was a breakpoint, stop and print. */
3094 /* We hit the longjmp breakpoint. */
3097 /* We hit the longjmp_resume breakpoint. */
3100 /* We hit the step_resume breakpoint. */
3103 /* We hit the shared library event breakpoint. */
3106 /* This is just used to count how many enums there are. */
3110 /* Here is the table which drives this routine. So that we can
3111 format it pretty, we define some abbreviations for the
3112 enum bpstat_what codes. */
3113 #define kc BPSTAT_WHAT_KEEP_CHECKING
3114 #define ss BPSTAT_WHAT_STOP_SILENT
3115 #define sn BPSTAT_WHAT_STOP_NOISY
3116 #define sgl BPSTAT_WHAT_SINGLE
3117 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3118 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3119 #define sr BPSTAT_WHAT_STEP_RESUME
3120 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3122 /* "Can't happen." Might want to print an error message.
3123 abort() is not out of the question, but chances are GDB is just
3124 a bit confused, not unusable. */
3125 #define err BPSTAT_WHAT_STOP_NOISY
3127 /* Given an old action and a class, come up with a new action. */
3128 /* One interesting property of this table is that wp_silent is the same
3129 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3130 after stopping, the check for whether to step over a breakpoint
3131 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3132 reference to how we stopped. We retain separate wp_silent and
3133 bp_silent codes in case we want to change that someday.
3135 Another possibly interesting property of this table is that
3136 there's a partial ordering, priority-like, of the actions. Once
3137 you've decided that some action is appropriate, you'll never go
3138 back and decide something of a lower priority is better. The
3141 kc < clr sgl shl slr sn sr ss
3142 sgl < shl slr sn sr ss
3143 slr < err shl sn sr ss
3144 clr < err shl sn sr ss
3150 What I think this means is that we don't need a damned table
3151 here. If you just put the rows and columns in the right order,
3152 it'd look awfully regular. We could simply walk the bpstat list
3153 and choose the highest priority action we find, with a little
3154 logic to handle the 'err' cases. */
3156 /* step_resume entries: a step resume breakpoint overrides another
3157 breakpoint of signal handling (see comment in wait_for_inferior
3158 at where we set the step_resume breakpoint). */
3160 static const enum bpstat_what_main_action
3161 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3164 /* kc ss sn sgl slr clr sr shl
3167 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
},
3169 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3171 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3173 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
},
3175 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3177 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3179 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
},
3181 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
},
3183 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3185 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
}
3198 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3199 struct bpstat_what retval
;
3201 retval
.call_dummy
= 0;
3202 for (; bs
!= NULL
; bs
= bs
->next
)
3204 enum class bs_class
= no_effect
;
3205 if (bs
->breakpoint_at
== NULL
)
3206 /* I suspect this can happen if it was a momentary breakpoint
3207 which has since been deleted. */
3209 if (bs
->breakpoint_at
->owner
== NULL
)
3210 bs_class
= bp_nostop
;
3212 switch (bs
->breakpoint_at
->owner
->type
)
3218 case bp_hardware_breakpoint
:
3224 bs_class
= bp_noisy
;
3226 bs_class
= bp_silent
;
3229 bs_class
= bp_nostop
;
3232 case bp_hardware_watchpoint
:
3233 case bp_read_watchpoint
:
3234 case bp_access_watchpoint
:
3238 bs_class
= wp_noisy
;
3240 bs_class
= wp_silent
;
3243 /* There was a watchpoint, but we're not stopping.
3244 This requires no further action. */
3245 bs_class
= no_effect
;
3248 bs_class
= long_jump
;
3250 case bp_longjmp_resume
:
3251 bs_class
= long_resume
;
3253 case bp_step_resume
:
3256 bs_class
= step_resume
;
3259 /* It is for the wrong frame. */
3260 bs_class
= bp_nostop
;
3262 case bp_watchpoint_scope
:
3263 bs_class
= bp_nostop
;
3265 case bp_shlib_event
:
3266 bs_class
= shlib_event
;
3268 case bp_thread_event
:
3269 case bp_overlay_event
:
3270 bs_class
= bp_nostop
;
3276 bs_class
= bp_noisy
;
3278 bs_class
= bp_silent
;
3281 /* There was a catchpoint, but we're not stopping.
3282 This requires no further action. */
3283 bs_class
= no_effect
;
3286 /* Make sure the action is stop (silent or noisy),
3287 so infrun.c pops the dummy frame. */
3288 bs_class
= bp_silent
;
3289 retval
.call_dummy
= 1;
3292 current_action
= table
[(int) bs_class
][(int) current_action
];
3294 retval
.main_action
= current_action
;
3298 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3299 without hardware support). This isn't related to a specific bpstat,
3300 just to things like whether watchpoints are set. */
3303 bpstat_should_step (void)
3305 struct breakpoint
*b
;
3307 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3314 static void print_breakpoint_location (struct breakpoint
*b
,
3315 struct bp_location
*loc
,
3317 struct ui_stream
*stb
)
3322 = find_pc_sect_function (loc
->address
, loc
->section
);
3325 ui_out_text (uiout
, "in ");
3326 ui_out_field_string (uiout
, "func",
3327 SYMBOL_PRINT_NAME (sym
));
3328 ui_out_wrap_hint (uiout
, wrap_indent
);
3329 ui_out_text (uiout
, " at ");
3331 ui_out_field_string (uiout
, "file", b
->source_file
);
3332 ui_out_text (uiout
, ":");
3334 if (ui_out_is_mi_like_p (uiout
))
3336 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3337 char *fullname
= symtab_to_fullname (sal
.symtab
);
3340 ui_out_field_string (uiout
, "fullname", fullname
);
3343 ui_out_field_int (uiout
, "line", b
->line_number
);
3347 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3351 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3352 ui_out_field_stream (uiout
, "at", stb
);
3356 /* Print B to gdb_stdout. */
3358 print_one_breakpoint_location (struct breakpoint
*b
,
3359 struct bp_location
*loc
,
3361 CORE_ADDR
*last_addr
)
3363 struct command_line
*l
;
3365 struct ep_type_description
3370 static struct ep_type_description bptypes
[] =
3372 {bp_none
, "?deleted?"},
3373 {bp_breakpoint
, "breakpoint"},
3374 {bp_hardware_breakpoint
, "hw breakpoint"},
3375 {bp_until
, "until"},
3376 {bp_finish
, "finish"},
3377 {bp_watchpoint
, "watchpoint"},
3378 {bp_hardware_watchpoint
, "hw watchpoint"},
3379 {bp_read_watchpoint
, "read watchpoint"},
3380 {bp_access_watchpoint
, "acc watchpoint"},
3381 {bp_longjmp
, "longjmp"},
3382 {bp_longjmp_resume
, "longjmp resume"},
3383 {bp_step_resume
, "step resume"},
3384 {bp_watchpoint_scope
, "watchpoint scope"},
3385 {bp_call_dummy
, "call dummy"},
3386 {bp_shlib_event
, "shlib events"},
3387 {bp_thread_event
, "thread events"},
3388 {bp_overlay_event
, "overlay events"},
3389 {bp_catchpoint
, "catchpoint"},
3392 static char bpenables
[] = "nynny";
3393 char wrap_indent
[80];
3394 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3395 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3396 struct cleanup
*bkpt_chain
;
3398 int header_of_multiple
= 0;
3399 int part_of_multiple
= (loc
!= NULL
);
3400 struct value_print_options opts
;
3402 get_user_print_options (&opts
);
3404 gdb_assert (!loc
|| loc_number
!= 0);
3405 /* See comment in print_one_breakpoint concerning
3406 treatment of breakpoints with single disabled
3410 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3411 header_of_multiple
= 1;
3416 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3420 if (part_of_multiple
)
3423 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3424 ui_out_field_string (uiout
, "number", formatted
);
3429 ui_out_field_int (uiout
, "number", b
->number
);
3434 if (part_of_multiple
)
3435 ui_out_field_skip (uiout
, "type");
3438 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3439 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3440 internal_error (__FILE__
, __LINE__
,
3441 _("bptypes table does not describe type #%d."),
3443 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3448 if (part_of_multiple
)
3449 ui_out_field_skip (uiout
, "disp");
3451 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3456 if (part_of_multiple
)
3457 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3459 ui_out_field_fmt (uiout
, "enabled", "%c",
3460 bpenables
[(int) b
->enable_state
]);
3461 ui_out_spaces (uiout
, 2);
3465 strcpy (wrap_indent
, " ");
3466 if (opts
.addressprint
)
3468 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3469 strcat (wrap_indent
, " ");
3471 strcat (wrap_indent
, " ");
3474 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3476 /* Although the print_one can possibly print
3477 all locations, calling it here is not likely
3478 to get any nice result. So, make sure there's
3479 just one location. */
3480 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3481 b
->ops
->print_one (b
, last_addr
);
3487 internal_error (__FILE__
, __LINE__
,
3488 _("print_one_breakpoint: bp_none encountered\n"));
3492 case bp_hardware_watchpoint
:
3493 case bp_read_watchpoint
:
3494 case bp_access_watchpoint
:
3495 /* Field 4, the address, is omitted (which makes the columns
3496 not line up too nicely with the headers, but the effect
3497 is relatively readable). */
3498 if (opts
.addressprint
)
3499 ui_out_field_skip (uiout
, "addr");
3501 ui_out_field_string (uiout
, "what", b
->exp_string
);
3505 case bp_hardware_breakpoint
:
3509 case bp_longjmp_resume
:
3510 case bp_step_resume
:
3511 case bp_watchpoint_scope
:
3513 case bp_shlib_event
:
3514 case bp_thread_event
:
3515 case bp_overlay_event
:
3516 if (opts
.addressprint
)
3519 if (header_of_multiple
)
3520 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3521 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3522 ui_out_field_string (uiout
, "addr", "<PENDING>");
3524 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3527 if (!header_of_multiple
)
3528 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3530 *last_addr
= b
->loc
->address
;
3534 if (!part_of_multiple
&& b
->thread
!= -1)
3536 /* FIXME: This seems to be redundant and lost here; see the
3537 "stop only in" line a little further down. */
3538 ui_out_text (uiout
, " thread ");
3539 ui_out_field_int (uiout
, "thread", b
->thread
);
3542 ui_out_text (uiout
, "\n");
3544 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3547 ui_out_text (uiout
, "\tstop only in stack frame at ");
3548 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3550 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3551 ui_out_text (uiout
, "\n");
3554 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3556 /* We do not print the condition for Ada exception catchpoints
3557 because the condition is an internal implementation detail
3558 that we do not want to expose to the user. */
3560 ui_out_text (uiout
, "\tstop only if ");
3561 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3562 ui_out_text (uiout
, "\n");
3565 if (!part_of_multiple
&& b
->thread
!= -1)
3567 /* FIXME should make an annotation for this */
3568 ui_out_text (uiout
, "\tstop only in thread ");
3569 ui_out_field_int (uiout
, "thread", b
->thread
);
3570 ui_out_text (uiout
, "\n");
3573 if (!part_of_multiple
&& b
->hit_count
)
3575 /* FIXME should make an annotation for this */
3576 if (ep_is_catchpoint (b
))
3577 ui_out_text (uiout
, "\tcatchpoint");
3579 ui_out_text (uiout
, "\tbreakpoint");
3580 ui_out_text (uiout
, " already hit ");
3581 ui_out_field_int (uiout
, "times", b
->hit_count
);
3582 if (b
->hit_count
== 1)
3583 ui_out_text (uiout
, " time\n");
3585 ui_out_text (uiout
, " times\n");
3588 /* Output the count also if it is zero, but only if this is
3589 mi. FIXME: Should have a better test for this. */
3590 if (ui_out_is_mi_like_p (uiout
))
3591 if (!part_of_multiple
&& b
->hit_count
== 0)
3592 ui_out_field_int (uiout
, "times", b
->hit_count
);
3594 if (!part_of_multiple
&& b
->ignore_count
)
3597 ui_out_text (uiout
, "\tignore next ");
3598 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3599 ui_out_text (uiout
, " hits\n");
3602 if (!part_of_multiple
&& (l
= b
->commands
))
3604 struct cleanup
*script_chain
;
3607 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3608 print_command_lines (uiout
, l
, 4);
3609 do_cleanups (script_chain
);
3612 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3615 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3616 else if (b
->exp_string
)
3617 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3620 do_cleanups (bkpt_chain
);
3621 do_cleanups (old_chain
);
3625 print_one_breakpoint (struct breakpoint
*b
,
3626 CORE_ADDR
*last_addr
)
3628 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3630 /* If this breakpoint has custom print function,
3631 it's already printed. Otherwise, print individual
3632 locations, if any. */
3633 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3635 /* If breakpoint has a single location that is
3636 disabled, we print it as if it had
3637 several locations, since otherwise it's hard to
3638 represent "breakpoint enabled, location disabled"
3640 Note that while hardware watchpoints have
3641 several locations internally, that's no a property
3644 && !is_hardware_watchpoint (b
)
3645 && (b
->loc
->next
|| !b
->loc
->enabled
)
3646 && !ui_out_is_mi_like_p (uiout
))
3648 struct bp_location
*loc
;
3650 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3651 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3657 struct captured_breakpoint_query_args
3663 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3665 struct captured_breakpoint_query_args
*args
= data
;
3666 struct breakpoint
*b
;
3667 CORE_ADDR dummy_addr
= 0;
3670 if (args
->bnum
== b
->number
)
3672 print_one_breakpoint (b
, &dummy_addr
);
3680 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3682 struct captured_breakpoint_query_args args
;
3684 /* For the moment we don't trust print_one_breakpoint() to not throw
3686 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3687 error_message
, RETURN_MASK_ALL
) < 0)
3693 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3694 catchpoints, et.al.). */
3697 user_settable_breakpoint (const struct breakpoint
*b
)
3699 return (b
->type
== bp_breakpoint
3700 || b
->type
== bp_catchpoint
3701 || b
->type
== bp_hardware_breakpoint
3702 || b
->type
== bp_watchpoint
3703 || b
->type
== bp_read_watchpoint
3704 || b
->type
== bp_access_watchpoint
3705 || b
->type
== bp_hardware_watchpoint
);
3708 /* Print information on user settable breakpoint (watchpoint, etc)
3709 number BNUM. If BNUM is -1 print all user settable breakpoints.
3710 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3713 breakpoint_1 (int bnum
, int allflag
)
3715 struct breakpoint
*b
;
3716 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3717 int nr_printable_breakpoints
;
3718 struct cleanup
*bkpttbl_chain
;
3719 struct value_print_options opts
;
3721 get_user_print_options (&opts
);
3723 /* Compute the number of rows in the table. */
3724 nr_printable_breakpoints
= 0;
3727 || bnum
== b
->number
)
3729 if (allflag
|| user_settable_breakpoint (b
))
3730 nr_printable_breakpoints
++;
3733 if (opts
.addressprint
)
3735 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3739 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3742 if (nr_printable_breakpoints
> 0)
3743 annotate_breakpoints_headers ();
3744 if (nr_printable_breakpoints
> 0)
3746 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3747 if (nr_printable_breakpoints
> 0)
3749 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3750 if (nr_printable_breakpoints
> 0)
3752 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3753 if (nr_printable_breakpoints
> 0)
3755 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3756 if (opts
.addressprint
)
3758 if (nr_printable_breakpoints
> 0)
3760 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3761 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3763 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3765 if (nr_printable_breakpoints
> 0)
3767 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3768 ui_out_table_body (uiout
);
3769 if (nr_printable_breakpoints
> 0)
3770 annotate_breakpoints_table ();
3774 || bnum
== b
->number
)
3776 /* We only print out user settable breakpoints unless the
3778 if (allflag
|| user_settable_breakpoint (b
))
3779 print_one_breakpoint (b
, &last_addr
);
3782 do_cleanups (bkpttbl_chain
);
3784 if (nr_printable_breakpoints
== 0)
3787 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3789 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3794 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3795 that a comparison of an unsigned with -1 is always false. */
3796 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3797 set_next_address (current_gdbarch
, last_addr
);
3800 /* FIXME? Should this be moved up so that it is only called when
3801 there have been breakpoints? */
3802 annotate_breakpoints_table_end ();
3806 breakpoints_info (char *bnum_exp
, int from_tty
)
3811 bnum
= parse_and_eval_long (bnum_exp
);
3813 breakpoint_1 (bnum
, 0);
3817 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3822 bnum
= parse_and_eval_long (bnum_exp
);
3824 breakpoint_1 (bnum
, 1);
3828 breakpoint_has_pc (struct breakpoint
*b
,
3829 CORE_ADDR pc
, struct obj_section
*section
)
3831 struct bp_location
*bl
= b
->loc
;
3832 for (; bl
; bl
= bl
->next
)
3834 if (bl
->address
== pc
3835 && (!overlay_debugging
|| bl
->section
== section
))
3841 /* Print a message describing any breakpoints set at PC. */
3844 describe_other_breakpoints (CORE_ADDR pc
, struct obj_section
*section
,
3848 struct breakpoint
*b
;
3851 others
+= breakpoint_has_pc (b
, pc
, section
);
3855 printf_filtered (_("Note: breakpoint "));
3856 else /* if (others == ???) */
3857 printf_filtered (_("Note: breakpoints "));
3859 if (breakpoint_has_pc (b
, pc
, section
))
3862 printf_filtered ("%d", b
->number
);
3863 if (b
->thread
== -1 && thread
!= -1)
3864 printf_filtered (" (all threads)");
3865 else if (b
->thread
!= -1)
3866 printf_filtered (" (thread %d)", b
->thread
);
3867 printf_filtered ("%s%s ",
3868 ((b
->enable_state
== bp_disabled
||
3869 b
->enable_state
== bp_call_disabled
)
3871 : b
->enable_state
== bp_permanent
3875 : ((others
== 1) ? " and" : ""));
3877 printf_filtered (_("also set at pc "));
3878 fputs_filtered (paddress (pc
), gdb_stdout
);
3879 printf_filtered (".\n");
3883 /* Set the default place to put a breakpoint
3884 for the `break' command with no arguments. */
3887 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3890 default_breakpoint_valid
= valid
;
3891 default_breakpoint_address
= addr
;
3892 default_breakpoint_symtab
= symtab
;
3893 default_breakpoint_line
= line
;
3896 /* Return true iff it is meaningful to use the address member of
3897 BPT. For some breakpoint types, the address member is irrelevant
3898 and it makes no sense to attempt to compare it to other addresses
3899 (or use it for any other purpose either).
3901 More specifically, each of the following breakpoint types will always
3902 have a zero valued address and we don't want check_duplicates() to mark
3903 breakpoints of any of these types to be a duplicate of an actual
3904 breakpoint at address zero:
3907 bp_hardware_watchpoint
3909 bp_access_watchpoint
3913 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3915 enum bptype type
= bpt
->type
;
3917 return (type
!= bp_watchpoint
3918 && type
!= bp_hardware_watchpoint
3919 && type
!= bp_read_watchpoint
3920 && type
!= bp_access_watchpoint
3921 && type
!= bp_catchpoint
);
3924 /* Rescan breakpoints at the same address and section as BPT,
3925 marking the first one as "first" and any others as "duplicates".
3926 This is so that the bpt instruction is only inserted once.
3927 If we have a permanent breakpoint at the same place as BPT, make
3928 that one the official one, and the rest as duplicates. */
3931 check_duplicates_for (CORE_ADDR address
, struct obj_section
*section
)
3933 struct bp_location
*b
;
3935 struct bp_location
*perm_bp
= 0;
3937 ALL_BP_LOCATIONS (b
)
3938 if (b
->owner
->enable_state
!= bp_disabled
3939 && b
->owner
->enable_state
!= bp_call_disabled
3941 && !b
->shlib_disabled
3942 && b
->address
== address
/* address / overlay match */
3943 && (!overlay_debugging
|| b
->section
== section
)
3944 && breakpoint_address_is_meaningful (b
->owner
))
3946 /* Have we found a permanent breakpoint? */
3947 if (b
->owner
->enable_state
== bp_permanent
)
3954 b
->duplicate
= count
> 1;
3957 /* If we found a permanent breakpoint at this address, go over the
3958 list again and declare all the other breakpoints there (except
3959 other permanent breakpoints) to be the duplicates. */
3962 perm_bp
->duplicate
= 0;
3964 /* Permanent breakpoint should always be inserted. */
3965 if (! perm_bp
->inserted
)
3966 internal_error (__FILE__
, __LINE__
,
3967 _("allegedly permanent breakpoint is not "
3968 "actually inserted"));
3970 ALL_BP_LOCATIONS (b
)
3973 if (b
->owner
->enable_state
!= bp_permanent
3974 && b
->owner
->enable_state
!= bp_disabled
3975 && b
->owner
->enable_state
!= bp_call_disabled
3976 && b
->enabled
&& !b
->shlib_disabled
3977 && b
->address
== address
/* address / overlay match */
3978 && (!overlay_debugging
|| b
->section
== section
)
3979 && breakpoint_address_is_meaningful (b
->owner
))
3982 internal_error (__FILE__
, __LINE__
,
3983 _("another breakpoint was inserted on top of "
3984 "a permanent breakpoint"));
3993 check_duplicates (struct breakpoint
*bpt
)
3995 struct bp_location
*bl
= bpt
->loc
;
3997 if (! breakpoint_address_is_meaningful (bpt
))
4000 for (; bl
; bl
= bl
->next
)
4001 check_duplicates_for (bl
->address
, bl
->section
);
4005 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4006 int bnum
, int have_bnum
)
4011 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4012 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4014 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4015 bnum
, astr1
, astr2
);
4017 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4020 /* Adjust a breakpoint's address to account for architectural constraints
4021 on breakpoint placement. Return the adjusted address. Note: Very
4022 few targets require this kind of adjustment. For most targets,
4023 this function is simply the identity function. */
4026 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4028 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4030 /* Very few targets need any kind of breakpoint adjustment. */
4033 else if (bptype
== bp_watchpoint
4034 || bptype
== bp_hardware_watchpoint
4035 || bptype
== bp_read_watchpoint
4036 || bptype
== bp_access_watchpoint
4037 || bptype
== bp_catchpoint
)
4039 /* Watchpoints and the various bp_catch_* eventpoints should not
4040 have their addresses modified. */
4045 CORE_ADDR adjusted_bpaddr
;
4047 /* Some targets have architectural constraints on the placement
4048 of breakpoint instructions. Obtain the adjusted address. */
4049 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4052 /* An adjusted breakpoint address can significantly alter
4053 a user's expectations. Print a warning if an adjustment
4055 if (adjusted_bpaddr
!= bpaddr
)
4056 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4058 return adjusted_bpaddr
;
4062 /* Allocate a struct bp_location. */
4064 static struct bp_location
*
4065 allocate_bp_location (struct breakpoint
*bpt
)
4067 struct bp_location
*loc
, *loc_p
;
4069 loc
= xmalloc (sizeof (struct bp_location
));
4070 memset (loc
, 0, sizeof (*loc
));
4074 loc
->shlib_disabled
= 0;
4083 case bp_longjmp_resume
:
4084 case bp_step_resume
:
4085 case bp_watchpoint_scope
:
4087 case bp_shlib_event
:
4088 case bp_thread_event
:
4089 case bp_overlay_event
:
4090 loc
->loc_type
= bp_loc_software_breakpoint
;
4092 case bp_hardware_breakpoint
:
4093 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4095 case bp_hardware_watchpoint
:
4096 case bp_read_watchpoint
:
4097 case bp_access_watchpoint
:
4098 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4102 loc
->loc_type
= bp_loc_other
;
4105 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4111 static void free_bp_location (struct bp_location
*loc
)
4116 if (loc
->function_name
)
4117 xfree (loc
->function_name
);
4122 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4123 that has type BPTYPE and has no locations as yet. */
4125 static struct breakpoint
*
4126 set_raw_breakpoint_without_location (enum bptype bptype
)
4128 struct breakpoint
*b
, *b1
;
4130 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4131 memset (b
, 0, sizeof (*b
));
4134 b
->language
= current_language
->la_language
;
4135 b
->input_radix
= input_radix
;
4137 b
->enable_state
= bp_enabled
;
4140 b
->ignore_count
= 0;
4142 b
->frame_id
= null_frame_id
;
4143 b
->forked_inferior_pid
= null_ptid
;
4144 b
->exec_pathname
= NULL
;
4146 b
->condition_not_parsed
= 0;
4148 /* Add this breakpoint to the end of the chain
4149 so that a list of breakpoints will come out in order
4150 of increasing numbers. */
4152 b1
= breakpoint_chain
;
4154 breakpoint_chain
= b
;
4164 /* Initialize loc->function_name. */
4166 set_breakpoint_location_function (struct bp_location
*loc
)
4168 if (loc
->owner
->type
== bp_breakpoint
4169 || loc
->owner
->type
== bp_hardware_breakpoint
)
4171 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4173 if (loc
->function_name
)
4174 loc
->function_name
= xstrdup (loc
->function_name
);
4178 /* set_raw_breakpoint is a low level routine for allocating and
4179 partially initializing a breakpoint of type BPTYPE. The newly
4180 created breakpoint's address, section, source file name, and line
4181 number are provided by SAL. The newly created and partially
4182 initialized breakpoint is added to the breakpoint chain and
4183 is also returned as the value of this function.
4185 It is expected that the caller will complete the initialization of
4186 the newly created breakpoint struct as well as output any status
4187 information regarding the creation of a new breakpoint. In
4188 particular, set_raw_breakpoint does NOT set the breakpoint
4189 number! Care should be taken to not allow an error to occur
4190 prior to completing the initialization of the breakpoint. If this
4191 should happen, a bogus breakpoint will be left on the chain. */
4194 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4196 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4197 CORE_ADDR adjusted_address
;
4199 /* Adjust the breakpoint's address prior to allocating a location.
4200 Once we call allocate_bp_location(), that mostly uninitialized
4201 location will be placed on the location chain. Adjustment of the
4202 breakpoint may cause target_read_memory() to be called and we do
4203 not want its scan of the location chain to find a breakpoint and
4204 location that's only been partially initialized. */
4205 adjusted_address
= adjust_breakpoint_address (sal
.pc
, b
->type
);
4207 b
->loc
= allocate_bp_location (b
);
4208 b
->loc
->requested_address
= sal
.pc
;
4209 b
->loc
->address
= adjusted_address
;
4211 if (sal
.symtab
== NULL
)
4212 b
->source_file
= NULL
;
4214 b
->source_file
= savestring (sal
.symtab
->filename
,
4215 strlen (sal
.symtab
->filename
));
4216 b
->loc
->section
= sal
.section
;
4217 b
->line_number
= sal
.line
;
4219 set_breakpoint_location_function (b
->loc
);
4221 breakpoints_changed ();
4227 /* Note that the breakpoint object B describes a permanent breakpoint
4228 instruction, hard-wired into the inferior's code. */
4230 make_breakpoint_permanent (struct breakpoint
*b
)
4232 struct bp_location
*bl
;
4233 b
->enable_state
= bp_permanent
;
4235 /* By definition, permanent breakpoints are already present in the code.
4236 Mark all locations as inserted. For now, make_breakpoint_permanent
4237 is called in just one place, so it's hard to say if it's reasonable
4238 to have permanent breakpoint with multiple locations or not,
4239 but it's easy to implmement. */
4240 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4244 static struct breakpoint
*
4245 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4247 static int internal_breakpoint_number
= -1;
4248 struct symtab_and_line sal
;
4249 struct breakpoint
*b
;
4251 init_sal (&sal
); /* initialize to zeroes */
4254 sal
.section
= find_pc_overlay (sal
.pc
);
4256 b
= set_raw_breakpoint (sal
, type
);
4257 b
->number
= internal_breakpoint_number
--;
4258 b
->disposition
= disp_donttouch
;
4265 create_longjmp_breakpoint (char *func_name
)
4267 struct minimal_symbol
*m
;
4269 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4271 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4272 update_global_location_list (1);
4275 /* Call this routine when stepping and nexting to enable a breakpoint
4276 if we do a longjmp(). When we hit that breakpoint, call
4277 set_longjmp_resume_breakpoint() to figure out where we are going. */
4280 set_longjmp_breakpoint (void)
4282 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4284 create_longjmp_breakpoint ("longjmp");
4285 create_longjmp_breakpoint ("_longjmp");
4286 create_longjmp_breakpoint ("siglongjmp");
4287 create_longjmp_breakpoint ("_siglongjmp");
4291 /* Delete all longjmp breakpoints from THREAD. */
4293 delete_longjmp_breakpoint (int thread
)
4295 struct breakpoint
*b
, *temp
;
4297 ALL_BREAKPOINTS_SAFE (b
, temp
)
4298 if (b
->type
== bp_longjmp
)
4300 if (b
->thread
== thread
)
4301 delete_breakpoint (b
);
4306 create_overlay_event_breakpoint_1 (char *func_name
, struct objfile
*objfile
)
4308 struct breakpoint
*b
;
4309 struct minimal_symbol
*m
;
4311 if ((m
= lookup_minimal_symbol_text (func_name
, objfile
)) == NULL
)
4314 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4316 b
->addr_string
= xstrdup (func_name
);
4318 if (overlay_debugging
== ovly_auto
)
4320 b
->enable_state
= bp_enabled
;
4321 overlay_events_enabled
= 1;
4325 b
->enable_state
= bp_disabled
;
4326 overlay_events_enabled
= 0;
4328 update_global_location_list (1);
4332 create_overlay_event_breakpoint (char *func_name
)
4334 struct objfile
*objfile
;
4335 ALL_OBJFILES (objfile
)
4336 create_overlay_event_breakpoint_1 (func_name
, objfile
);
4340 enable_overlay_breakpoints (void)
4342 struct breakpoint
*b
;
4345 if (b
->type
== bp_overlay_event
)
4347 b
->enable_state
= bp_enabled
;
4348 update_global_location_list (1);
4349 overlay_events_enabled
= 1;
4354 disable_overlay_breakpoints (void)
4356 struct breakpoint
*b
;
4359 if (b
->type
== bp_overlay_event
)
4361 b
->enable_state
= bp_disabled
;
4362 update_global_location_list (0);
4363 overlay_events_enabled
= 0;
4368 create_thread_event_breakpoint (CORE_ADDR address
)
4370 struct breakpoint
*b
;
4372 b
= create_internal_breakpoint (address
, bp_thread_event
);
4374 b
->enable_state
= bp_enabled
;
4375 /* addr_string has to be used or breakpoint_re_set will delete me. */
4376 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4378 update_global_location_list_nothrow (1);
4384 remove_thread_event_breakpoints (void)
4386 struct breakpoint
*b
, *temp
;
4388 ALL_BREAKPOINTS_SAFE (b
, temp
)
4389 if (b
->type
== bp_thread_event
)
4390 delete_breakpoint (b
);
4393 struct captured_parse_breakpoint_args
4396 struct symtabs_and_lines
*sals_p
;
4397 char ***addr_string_p
;
4401 struct lang_and_radix
4409 remove_solib_event_breakpoints (void)
4411 struct breakpoint
*b
, *temp
;
4413 ALL_BREAKPOINTS_SAFE (b
, temp
)
4414 if (b
->type
== bp_shlib_event
)
4415 delete_breakpoint (b
);
4419 create_solib_event_breakpoint (CORE_ADDR address
)
4421 struct breakpoint
*b
;
4423 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4424 update_global_location_list_nothrow (1);
4428 /* Disable any breakpoints that are on code in shared libraries. Only
4429 apply to enabled breakpoints, disabled ones can just stay disabled. */
4432 disable_breakpoints_in_shlibs (void)
4434 struct bp_location
*loc
;
4436 ALL_BP_LOCATIONS (loc
)
4438 struct breakpoint
*b
= loc
->owner
;
4439 /* We apply the check to all breakpoints, including disabled
4440 for those with loc->duplicate set. This is so that when breakpoint
4441 becomes enabled, or the duplicate is removed, gdb will try to insert
4442 all breakpoints. If we don't set shlib_disabled here, we'll try
4443 to insert those breakpoints and fail. */
4444 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4445 && !loc
->shlib_disabled
4447 && PC_SOLIB (loc
->address
)
4449 && solib_name_from_address (loc
->address
)
4453 loc
->shlib_disabled
= 1;
4458 /* Disable any breakpoints that are in in an unloaded shared library. Only
4459 apply to enabled breakpoints, disabled ones can just stay disabled. */
4462 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4464 struct bp_location
*loc
;
4465 int disabled_shlib_breaks
= 0;
4467 /* SunOS a.out shared libraries are always mapped, so do not
4468 disable breakpoints; they will only be reported as unloaded
4469 through clear_solib when GDB discards its shared library
4470 list. See clear_solib for more information. */
4471 if (exec_bfd
!= NULL
4472 && bfd_get_flavour (exec_bfd
) == bfd_target_aout_flavour
)
4475 ALL_BP_LOCATIONS (loc
)
4477 struct breakpoint
*b
= loc
->owner
;
4478 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4479 || loc
->loc_type
== bp_loc_software_breakpoint
)
4480 && !loc
->shlib_disabled
)
4483 char *so_name
= PC_SOLIB (loc
->address
);
4485 char *so_name
= solib_name_from_address (loc
->address
);
4487 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4489 loc
->shlib_disabled
= 1;
4490 /* At this point, we cannot rely on remove_breakpoint
4491 succeeding so we must mark the breakpoint as not inserted
4492 to prevent future errors occurring in remove_breakpoints. */
4494 if (!disabled_shlib_breaks
)
4496 target_terminal_ours_for_output ();
4497 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4500 disabled_shlib_breaks
= 1;
4506 /* FORK & VFORK catchpoints. */
4508 /* Implement the "insert" breakpoint_ops method for fork catchpoints. */
4511 insert_catch_fork (struct breakpoint
*b
)
4513 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
4516 /* Implement the "remove" breakpoint_ops method for fork catchpoints. */
4519 remove_catch_fork (struct breakpoint
*b
)
4521 return target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
4524 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
4528 breakpoint_hit_catch_fork (struct breakpoint
*b
)
4530 return inferior_has_forked (inferior_ptid
, &b
->forked_inferior_pid
);
4533 /* Implement the "print_it" breakpoint_ops method for fork catchpoints. */
4535 static enum print_stop_action
4536 print_it_catch_fork (struct breakpoint
*b
)
4538 annotate_catchpoint (b
->number
);
4539 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
4540 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4541 return PRINT_SRC_AND_LOC
;
4544 /* Implement the "print_one" breakpoint_ops method for fork catchpoints. */
4547 print_one_catch_fork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4549 struct value_print_options opts
;
4551 get_user_print_options (&opts
);
4553 /* Field 4, the address, is omitted (which makes the columns
4554 not line up too nicely with the headers, but the effect
4555 is relatively readable). */
4556 if (opts
.addressprint
)
4557 ui_out_field_skip (uiout
, "addr");
4559 ui_out_text (uiout
, "fork");
4560 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4562 ui_out_text (uiout
, ", process ");
4563 ui_out_field_int (uiout
, "what",
4564 ptid_get_pid (b
->forked_inferior_pid
));
4565 ui_out_spaces (uiout
, 1);
4569 /* Implement the "print_mention" breakpoint_ops method for fork
4573 print_mention_catch_fork (struct breakpoint
*b
)
4575 printf_filtered (_("Catchpoint %d (fork)"), b
->number
);
4578 /* The breakpoint_ops structure to be used in fork catchpoints. */
4580 static struct breakpoint_ops catch_fork_breakpoint_ops
=
4584 breakpoint_hit_catch_fork
,
4585 print_it_catch_fork
,
4586 print_one_catch_fork
,
4587 print_mention_catch_fork
4590 /* Implement the "insert" breakpoint_ops method for vfork catchpoints. */
4593 insert_catch_vfork (struct breakpoint
*b
)
4595 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
4598 /* Implement the "remove" breakpoint_ops method for vfork catchpoints. */
4601 remove_catch_vfork (struct breakpoint
*b
)
4603 return target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
4606 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
4610 breakpoint_hit_catch_vfork (struct breakpoint
*b
)
4612 return inferior_has_vforked (inferior_ptid
, &b
->forked_inferior_pid
);
4615 /* Implement the "print_it" breakpoint_ops method for vfork catchpoints. */
4617 static enum print_stop_action
4618 print_it_catch_vfork (struct breakpoint
*b
)
4620 annotate_catchpoint (b
->number
);
4621 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
4622 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4623 return PRINT_SRC_AND_LOC
;
4626 /* Implement the "print_one" breakpoint_ops method for vfork catchpoints. */
4629 print_one_catch_vfork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4631 struct value_print_options opts
;
4633 get_user_print_options (&opts
);
4634 /* Field 4, the address, is omitted (which makes the columns
4635 not line up too nicely with the headers, but the effect
4636 is relatively readable). */
4637 if (opts
.addressprint
)
4638 ui_out_field_skip (uiout
, "addr");
4640 ui_out_text (uiout
, "vfork");
4641 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4643 ui_out_text (uiout
, ", process ");
4644 ui_out_field_int (uiout
, "what",
4645 ptid_get_pid (b
->forked_inferior_pid
));
4646 ui_out_spaces (uiout
, 1);
4650 /* Implement the "print_mention" breakpoint_ops method for vfork
4654 print_mention_catch_vfork (struct breakpoint
*b
)
4656 printf_filtered (_("Catchpoint %d (vfork)"), b
->number
);
4659 /* The breakpoint_ops structure to be used in vfork catchpoints. */
4661 static struct breakpoint_ops catch_vfork_breakpoint_ops
=
4665 breakpoint_hit_catch_vfork
,
4666 print_it_catch_vfork
,
4667 print_one_catch_vfork
,
4668 print_mention_catch_vfork
4671 /* Create a new breakpoint of the bp_catchpoint kind and return it.
4673 If TEMPFLAG is non-zero, then make the breakpoint temporary.
4674 If COND_STRING is not NULL, then store it in the breakpoint.
4675 OPS, if not NULL, is the breakpoint_ops structure associated
4676 to the catchpoint. */
4678 static struct breakpoint
*
4679 create_catchpoint (int tempflag
, char *cond_string
,
4680 struct breakpoint_ops
*ops
)
4682 struct symtab_and_line sal
;
4683 struct breakpoint
*b
;
4690 b
= set_raw_breakpoint (sal
, bp_catchpoint
);
4691 set_breakpoint_count (breakpoint_count
+ 1);
4692 b
->number
= breakpoint_count
;
4694 b
->cond_string
= (cond_string
== NULL
) ?
4695 NULL
: savestring (cond_string
, strlen (cond_string
));
4697 b
->addr_string
= NULL
;
4698 b
->enable_state
= bp_enabled
;
4699 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4703 update_global_location_list (1);
4709 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4710 struct breakpoint_ops
*ops
)
4712 struct breakpoint
*b
= create_catchpoint (tempflag
, cond_string
, ops
);
4714 /* FIXME: We should put this information in a breakpoint private data
4716 b
->forked_inferior_pid
= null_ptid
;
4719 /* Exec catchpoints. */
4722 insert_catch_exec (struct breakpoint
*b
)
4724 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
4728 remove_catch_exec (struct breakpoint
*b
)
4730 return target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
4734 breakpoint_hit_catch_exec (struct breakpoint
*b
)
4736 return inferior_has_execd (inferior_ptid
, &b
->exec_pathname
);
4739 static enum print_stop_action
4740 print_it_catch_exec (struct breakpoint
*b
)
4742 annotate_catchpoint (b
->number
);
4743 printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b
->number
,
4745 return PRINT_SRC_AND_LOC
;
4749 print_one_catch_exec (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4751 struct value_print_options opts
;
4753 get_user_print_options (&opts
);
4755 /* Field 4, the address, is omitted (which makes the columns
4756 not line up too nicely with the headers, but the effect
4757 is relatively readable). */
4758 if (opts
.addressprint
)
4759 ui_out_field_skip (uiout
, "addr");
4761 ui_out_text (uiout
, "exec");
4762 if (b
->exec_pathname
!= NULL
)
4764 ui_out_text (uiout
, ", program \"");
4765 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
4766 ui_out_text (uiout
, "\" ");
4771 print_mention_catch_exec (struct breakpoint
*b
)
4773 printf_filtered (_("Catchpoint %d (exec)"), b
->number
);
4776 static struct breakpoint_ops catch_exec_breakpoint_ops
=
4780 breakpoint_hit_catch_exec
,
4781 print_it_catch_exec
,
4782 print_one_catch_exec
,
4783 print_mention_catch_exec
4787 hw_breakpoint_used_count (void)
4789 struct breakpoint
*b
;
4794 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
4802 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4804 struct breakpoint
*b
;
4807 *other_type_used
= 0;
4810 if (breakpoint_enabled (b
))
4812 if (b
->type
== type
)
4814 else if ((b
->type
== bp_hardware_watchpoint
||
4815 b
->type
== bp_read_watchpoint
||
4816 b
->type
== bp_access_watchpoint
))
4817 *other_type_used
= 1;
4824 disable_watchpoints_before_interactive_call_start (void)
4826 struct breakpoint
*b
;
4830 if (((b
->type
== bp_watchpoint
)
4831 || (b
->type
== bp_hardware_watchpoint
)
4832 || (b
->type
== bp_read_watchpoint
)
4833 || (b
->type
== bp_access_watchpoint
))
4834 && breakpoint_enabled (b
))
4836 b
->enable_state
= bp_call_disabled
;
4837 update_global_location_list (0);
4843 enable_watchpoints_after_interactive_call_stop (void)
4845 struct breakpoint
*b
;
4849 if (((b
->type
== bp_watchpoint
)
4850 || (b
->type
== bp_hardware_watchpoint
)
4851 || (b
->type
== bp_read_watchpoint
)
4852 || (b
->type
== bp_access_watchpoint
))
4853 && (b
->enable_state
== bp_call_disabled
))
4855 b
->enable_state
= bp_enabled
;
4856 update_global_location_list (1);
4862 /* Set a breakpoint that will evaporate an end of command
4863 at address specified by SAL.
4864 Restrict it to frame FRAME if FRAME is nonzero. */
4867 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4870 struct breakpoint
*b
;
4871 b
= set_raw_breakpoint (sal
, type
);
4872 b
->enable_state
= bp_enabled
;
4873 b
->disposition
= disp_donttouch
;
4874 b
->frame_id
= frame_id
;
4876 /* If we're debugging a multi-threaded program, then we
4877 want momentary breakpoints to be active in only a
4878 single thread of control. */
4879 if (in_thread_list (inferior_ptid
))
4880 b
->thread
= pid_to_thread_id (inferior_ptid
);
4882 update_global_location_list_nothrow (1);
4888 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
4890 struct symtab_and_line sal
;
4892 sal
= find_pc_line (pc
, 0);
4894 sal
.section
= find_pc_overlay (pc
);
4895 sal
.explicit_pc
= 1;
4897 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
4901 /* Tell the user we have just set a breakpoint B. */
4904 mention (struct breakpoint
*b
)
4907 struct cleanup
*ui_out_chain
;
4908 struct value_print_options opts
;
4910 get_user_print_options (&opts
);
4912 /* FIXME: This is misplaced; mention() is called by things (like
4913 hitting a watchpoint) other than breakpoint creation. It should
4914 be possible to clean this up and at the same time replace the
4915 random calls to breakpoint_changed with this hook. */
4916 observer_notify_breakpoint_created (b
->number
);
4918 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4919 b
->ops
->print_mention (b
);
4924 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4927 ui_out_text (uiout
, "Watchpoint ");
4928 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4929 ui_out_field_int (uiout
, "number", b
->number
);
4930 ui_out_text (uiout
, ": ");
4931 ui_out_field_string (uiout
, "exp", b
->exp_string
);
4932 do_cleanups (ui_out_chain
);
4934 case bp_hardware_watchpoint
:
4935 ui_out_text (uiout
, "Hardware watchpoint ");
4936 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4937 ui_out_field_int (uiout
, "number", b
->number
);
4938 ui_out_text (uiout
, ": ");
4939 ui_out_field_string (uiout
, "exp", b
->exp_string
);
4940 do_cleanups (ui_out_chain
);
4942 case bp_read_watchpoint
:
4943 ui_out_text (uiout
, "Hardware read watchpoint ");
4944 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4945 ui_out_field_int (uiout
, "number", b
->number
);
4946 ui_out_text (uiout
, ": ");
4947 ui_out_field_string (uiout
, "exp", b
->exp_string
);
4948 do_cleanups (ui_out_chain
);
4950 case bp_access_watchpoint
:
4951 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4952 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4953 ui_out_field_int (uiout
, "number", b
->number
);
4954 ui_out_text (uiout
, ": ");
4955 ui_out_field_string (uiout
, "exp", b
->exp_string
);
4956 do_cleanups (ui_out_chain
);
4959 if (ui_out_is_mi_like_p (uiout
))
4964 if (b
->disposition
== disp_del
)
4965 printf_filtered (_("Temporary breakpoint"));
4967 printf_filtered (_("Breakpoint"));
4968 printf_filtered (_(" %d"), b
->number
);
4971 case bp_hardware_breakpoint
:
4972 if (ui_out_is_mi_like_p (uiout
))
4977 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4984 case bp_longjmp_resume
:
4985 case bp_step_resume
:
4987 case bp_watchpoint_scope
:
4988 case bp_shlib_event
:
4989 case bp_thread_event
:
4990 case bp_overlay_event
:
4996 /* i18n: cagney/2005-02-11: Below needs to be merged into a
5000 printf_filtered (_(" (%s) pending."), b
->addr_string
);
5004 if (opts
.addressprint
|| b
->source_file
== NULL
)
5006 printf_filtered (" at ");
5007 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5010 printf_filtered (": file %s, line %d.",
5011 b
->source_file
, b
->line_number
);
5015 struct bp_location
*loc
= b
->loc
;
5017 for (; loc
; loc
= loc
->next
)
5019 printf_filtered (" (%d locations)", n
);
5024 if (ui_out_is_mi_like_p (uiout
))
5026 printf_filtered ("\n");
5030 static struct bp_location
*
5031 add_location_to_breakpoint (struct breakpoint
*b
,
5032 const struct symtab_and_line
*sal
)
5034 struct bp_location
*loc
, **tmp
;
5036 loc
= allocate_bp_location (b
);
5037 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5040 loc
->requested_address
= sal
->pc
;
5041 loc
->address
= adjust_breakpoint_address (loc
->requested_address
, b
->type
);
5042 loc
->section
= sal
->section
;
5044 set_breakpoint_location_function (loc
);
5049 /* Return 1 if LOC is pointing to a permanent breakpoint,
5050 return 0 otherwise. */
5053 bp_loc_is_permanent (struct bp_location
*loc
)
5057 const gdb_byte
*brk
;
5058 gdb_byte
*target_mem
;
5059 struct cleanup
*cleanup
;
5062 gdb_assert (loc
!= NULL
);
5064 addr
= loc
->address
;
5065 brk
= gdbarch_breakpoint_from_pc (current_gdbarch
, &addr
, &len
);
5067 /* Software breakpoints unsupported? */
5071 target_mem
= alloca (len
);
5073 /* Enable the automatic memory restoration from breakpoints while
5074 we read the memory. Otherwise we could say about our temporary
5075 breakpoints they are permanent. */
5076 cleanup
= make_show_memory_breakpoints_cleanup (0);
5078 if (target_read_memory (loc
->address
, target_mem
, len
) == 0
5079 && memcmp (target_mem
, brk
, len
) == 0)
5082 do_cleanups (cleanup
);
5089 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5090 as textual description of the location, and COND_STRING
5091 as condition expression. */
5094 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5096 enum bptype type
, enum bpdisp disposition
,
5097 int thread
, int ignore_count
,
5098 struct breakpoint_ops
*ops
, int from_tty
, int enabled
)
5100 struct breakpoint
*b
= NULL
;
5103 if (type
== bp_hardware_breakpoint
)
5105 int i
= hw_breakpoint_used_count ();
5106 int target_resources_ok
=
5107 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5109 if (target_resources_ok
== 0)
5110 error (_("No hardware breakpoint support in the target."));
5111 else if (target_resources_ok
< 0)
5112 error (_("Hardware breakpoints used exceeds limit."));
5115 for (i
= 0; i
< sals
.nelts
; ++i
)
5117 struct symtab_and_line sal
= sals
.sals
[i
];
5118 struct bp_location
*loc
;
5121 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5125 b
= set_raw_breakpoint (sal
, type
);
5126 set_breakpoint_count (breakpoint_count
+ 1);
5127 b
->number
= breakpoint_count
;
5130 b
->cond_string
= cond_string
;
5131 b
->ignore_count
= ignore_count
;
5132 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5133 b
->disposition
= disposition
;
5139 loc
= add_location_to_breakpoint (b
, &sal
);
5142 if (bp_loc_is_permanent (loc
))
5143 make_breakpoint_permanent (b
);
5147 char *arg
= b
->cond_string
;
5148 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5150 error (_("Garbage %s follows condition"), arg
);
5155 b
->addr_string
= addr_string
;
5157 /* addr_string has to be used or breakpoint_re_set will delete
5159 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5165 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5166 elements to fill the void space. */
5168 remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5170 int i
= index_to_remove
+1;
5171 int last_index
= sal
->nelts
-1;
5173 for (;i
<= last_index
; ++i
)
5174 sal
->sals
[i
-1] = sal
->sals
[i
];
5179 /* If appropriate, obtains all sals that correspond
5180 to the same file and line as SAL. This is done
5181 only if SAL does not have explicit PC and has
5182 line and file information. If we got just a single
5183 expanded sal, return the original.
5185 Otherwise, if SAL.explicit_line is not set, filter out
5186 all sals for which the name of enclosing function
5187 is different from SAL. This makes sure that if we have
5188 breakpoint originally set in template instantiation, say
5189 foo<int>(), we won't expand SAL to locations at the same
5190 line in all existing instantiations of 'foo'.
5193 static struct symtabs_and_lines
5194 expand_line_sal_maybe (struct symtab_and_line sal
)
5196 struct symtabs_and_lines expanded
;
5197 CORE_ADDR original_pc
= sal
.pc
;
5198 char *original_function
= NULL
;
5202 /* If we have explicit pc, don't expand.
5203 If we have no line number, we can't expand. */
5204 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5207 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5208 expanded
.sals
[0] = sal
;
5213 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5215 expanded
= expand_line_sal (sal
);
5216 if (expanded
.nelts
== 1)
5218 /* We had one sal, we got one sal. Without futher
5219 processing, just return the original sal. */
5220 xfree (expanded
.sals
);
5222 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5223 sal
.pc
= original_pc
;
5224 expanded
.sals
[0] = sal
;
5228 if (!sal
.explicit_line
)
5230 CORE_ADDR func_addr
, func_end
;
5231 for (i
= 0; i
< expanded
.nelts
; ++i
)
5233 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5234 char *this_function
;
5235 if (find_pc_partial_function (pc
, &this_function
,
5236 &func_addr
, &func_end
))
5238 if (this_function
&&
5239 strcmp (this_function
, original_function
) != 0)
5241 remove_sal (&expanded
, i
);
5244 else if (func_addr
== pc
)
5246 /* We're at beginning of a function, and should
5248 struct symbol
*sym
= find_pc_function (pc
);
5250 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5253 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5260 if (expanded
.nelts
<= 1)
5262 /* This is un ugly workaround. If we get zero
5263 expanded sals then something is really wrong.
5264 Fix that by returnign the original sal. */
5265 xfree (expanded
.sals
);
5267 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5268 sal
.pc
= original_pc
;
5269 expanded
.sals
[0] = sal
;
5276 for (i
= 0; i
< expanded
.nelts
; ++i
)
5277 if (expanded
.sals
[i
].pc
== original_pc
)
5288 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5289 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5290 value. COND_STRING, if not NULL, specified the condition to be
5291 used for all breakpoints. Essentially the only case where
5292 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5293 function. In that case, it's still not possible to specify
5294 separate conditions for different overloaded functions, so
5295 we take just a single condition string.
5297 NOTE: If the function succeeds, the caller is expected to cleanup
5298 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5299 array contents). If the function fails (error() is called), the
5300 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5301 COND and SALS arrays and each of those arrays contents. */
5304 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5306 enum bptype type
, enum bpdisp disposition
,
5307 int thread
, int ignore_count
,
5308 struct breakpoint_ops
*ops
, int from_tty
,
5312 for (i
= 0; i
< sals
.nelts
; ++i
)
5314 struct symtabs_and_lines expanded
=
5315 expand_line_sal_maybe (sals
.sals
[i
]);
5317 create_breakpoint (expanded
, addr_string
[i
],
5318 cond_string
, type
, disposition
,
5319 thread
, ignore_count
, ops
, from_tty
, enabled
);
5322 update_global_location_list (1);
5325 /* Parse ARG which is assumed to be a SAL specification possibly
5326 followed by conditionals. On return, SALS contains an array of SAL
5327 addresses found. ADDR_STRING contains a vector of (canonical)
5328 address strings. ARG points to the end of the SAL. */
5331 parse_breakpoint_sals (char **address
,
5332 struct symtabs_and_lines
*sals
,
5333 char ***addr_string
,
5336 char *addr_start
= *address
;
5337 *addr_string
= NULL
;
5338 /* If no arg given, or if first arg is 'if ', use the default
5340 if ((*address
) == NULL
5341 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5343 if (default_breakpoint_valid
)
5345 struct symtab_and_line sal
;
5346 init_sal (&sal
); /* initialize to zeroes */
5347 sals
->sals
= (struct symtab_and_line
*)
5348 xmalloc (sizeof (struct symtab_and_line
));
5349 sal
.pc
= default_breakpoint_address
;
5350 sal
.line
= default_breakpoint_line
;
5351 sal
.symtab
= default_breakpoint_symtab
;
5352 sal
.section
= find_pc_overlay (sal
.pc
);
5353 sals
->sals
[0] = sal
;
5357 error (_("No default breakpoint address now."));
5361 /* Force almost all breakpoints to be in terms of the
5362 current_source_symtab (which is decode_line_1's default). This
5363 should produce the results we want almost all of the time while
5364 leaving default_breakpoint_* alone.
5365 ObjC: However, don't match an Objective-C method name which
5366 may have a '+' or '-' succeeded by a '[' */
5368 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5370 if (default_breakpoint_valid
5372 || ((strchr ("+-", (*address
)[0]) != NULL
)
5373 && ((*address
)[1] != '['))))
5374 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5375 default_breakpoint_line
, addr_string
,
5378 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5379 addr_string
, not_found_ptr
);
5381 /* For any SAL that didn't have a canonical string, fill one in. */
5382 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5383 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5384 if (addr_start
!= (*address
))
5387 for (i
= 0; i
< sals
->nelts
; i
++)
5389 /* Add the string if not present. */
5390 if ((*addr_string
)[i
] == NULL
)
5391 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5397 /* Convert each SAL into a real PC. Verify that the PC can be
5398 inserted as a breakpoint. If it can't throw an error. */
5401 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5405 for (i
= 0; i
< sals
->nelts
; i
++)
5406 resolve_sal_pc (&sals
->sals
[i
]);
5410 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5412 struct captured_parse_breakpoint_args
*args
= data
;
5414 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5415 args
->not_found_ptr
);
5418 /* Given TOK, a string specification of condition and thread, as
5419 accepted by the 'break' command, extract the condition
5420 string and thread number and set *COND_STRING and *THREAD.
5421 PC identifies the context at which the condition should be parsed.
5422 If no condition is found, *COND_STRING is set to NULL.
5423 If no thread is found, *THREAD is set to -1. */
5425 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5426 char **cond_string
, int *thread
)
5428 *cond_string
= NULL
;
5434 char *cond_start
= NULL
;
5435 char *cond_end
= NULL
;
5436 while (*tok
== ' ' || *tok
== '\t')
5441 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5444 toklen
= end_tok
- tok
;
5446 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5448 struct expression
*expr
;
5450 tok
= cond_start
= end_tok
+ 1;
5451 expr
= parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5454 *cond_string
= savestring (cond_start
,
5455 cond_end
- cond_start
);
5457 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5463 *thread
= strtol (tok
, &tok
, 0);
5465 error (_("Junk after thread keyword."));
5466 if (!valid_thread_id (*thread
))
5467 error (_("Unknown thread %d."), *thread
);
5470 error (_("Junk at end of arguments."));
5474 /* Set a breakpoint. This function is shared between
5475 CLI and MI functions for setting a breakpoint.
5476 This function has two major modes of operations,
5477 selected by the PARSE_CONDITION_AND_THREAD parameter.
5478 If non-zero, the function will parse arg, extracting
5479 breakpoint location, address and thread. Otherwise,
5480 ARG is just the location of breakpoint, with condition
5481 and thread specified by the COND_STRING and THREAD
5485 break_command_really (char *arg
, char *cond_string
, int thread
,
5486 int parse_condition_and_thread
,
5487 int tempflag
, int hardwareflag
,
5489 enum auto_boolean pending_break_support
,
5490 struct breakpoint_ops
*ops
,
5494 struct gdb_exception e
;
5495 struct symtabs_and_lines sals
;
5496 struct symtab_and_line pending_sal
;
5499 char *addr_start
= arg
;
5501 struct cleanup
*old_chain
;
5502 struct cleanup
*breakpoint_chain
= NULL
;
5503 struct captured_parse_breakpoint_args parse_args
;
5512 parse_args
.arg_p
= &arg
;
5513 parse_args
.sals_p
= &sals
;
5514 parse_args
.addr_string_p
= &addr_string
;
5515 parse_args
.not_found_ptr
= ¬_found
;
5517 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5518 &parse_args
, RETURN_MASK_ALL
);
5520 /* If caller is interested in rc value from parse, set value. */
5524 throw_exception (e
);
5528 case NOT_FOUND_ERROR
:
5530 /* If pending breakpoint support is turned off, throw
5533 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5534 throw_exception (e
);
5536 exception_print (gdb_stderr
, e
);
5538 /* If pending breakpoint support is auto query and the user
5539 selects no, then simply return the error code. */
5540 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5541 !nquery ("Make breakpoint pending on future shared library load? "))
5544 /* At this point, either the user was queried about setting
5545 a pending breakpoint and selected yes, or pending
5546 breakpoint behavior is on and thus a pending breakpoint
5547 is defaulted on behalf of the user. */
5548 copy_arg
= xstrdup (addr_start
);
5549 addr_string
= ©_arg
;
5551 sals
.sals
= &pending_sal
;
5556 throw_exception (e
);
5563 /* Create a chain of things that always need to be cleaned up. */
5564 old_chain
= make_cleanup (null_cleanup
, 0);
5568 /* Make sure that all storage allocated to SALS gets freed. */
5569 make_cleanup (xfree
, sals
.sals
);
5571 /* Cleanup the addr_string array but not its contents. */
5572 make_cleanup (xfree
, addr_string
);
5575 /* ----------------------------- SNIP -----------------------------
5576 Anything added to the cleanup chain beyond this point is assumed
5577 to be part of a breakpoint. If the breakpoint create succeeds
5578 then the memory is not reclaimed. */
5579 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5581 /* Mark the contents of the addr_string for cleanup. These go on
5582 the breakpoint_chain and only occure if the breakpoint create
5584 for (i
= 0; i
< sals
.nelts
; i
++)
5586 if (addr_string
[i
] != NULL
)
5587 make_cleanup (xfree
, addr_string
[i
]);
5590 /* Resolve all line numbers to PC's and verify that the addresses
5591 are ok for the target. */
5593 breakpoint_sals_to_pc (&sals
, addr_start
);
5595 /* Verify that condition can be parsed, before setting any
5596 breakpoints. Allocate a separate condition expression for each
5600 if (parse_condition_and_thread
)
5602 /* Here we only parse 'arg' to separate condition
5603 from thread number, so parsing in context of first
5604 sal is OK. When setting the breakpoint we'll
5605 re-parse it in context of each sal. */
5608 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5610 make_cleanup (xfree
, cond_string
);
5614 /* Create a private copy of condition string. */
5617 cond_string
= xstrdup (cond_string
);
5618 make_cleanup (xfree
, cond_string
);
5621 create_breakpoints (sals
, addr_string
, cond_string
,
5622 hardwareflag
? bp_hardware_breakpoint
5624 tempflag
? disp_del
: disp_donttouch
,
5625 thread
, ignore_count
, ops
, from_tty
, enabled
);
5629 struct symtab_and_line sal
= {0};
5630 struct breakpoint
*b
;
5632 make_cleanup (xfree
, copy_arg
);
5634 b
= set_raw_breakpoint_without_location (hardwareflag
5635 ? bp_hardware_breakpoint
5637 set_breakpoint_count (breakpoint_count
+ 1);
5638 b
->number
= breakpoint_count
;
5640 b
->addr_string
= addr_string
[0];
5641 b
->cond_string
= NULL
;
5642 b
->ignore_count
= ignore_count
;
5643 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5644 b
->condition_not_parsed
= 1;
5646 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5648 update_global_location_list (1);
5653 warning (_("Multiple breakpoints were set.\n"
5654 "Use the \"delete\" command to delete unwanted breakpoints."));
5655 /* That's it. Discard the cleanups for data inserted into the
5657 discard_cleanups (breakpoint_chain
);
5658 /* But cleanup everything else. */
5659 do_cleanups (old_chain
);
5662 /* Set a breakpoint.
5663 ARG is a string describing breakpoint address,
5664 condition, and thread.
5665 FLAG specifies if a breakpoint is hardware on,
5666 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5670 break_command_1 (char *arg
, int flag
, int from_tty
)
5672 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5673 int tempflag
= flag
& BP_TEMPFLAG
;
5675 break_command_really (arg
,
5676 NULL
, 0, 1 /* parse arg */,
5677 tempflag
, hardwareflag
,
5678 0 /* Ignore count */,
5679 pending_break_support
,
5680 NULL
/* breakpoint_ops */,
5687 set_breakpoint (char *address
, char *condition
,
5688 int hardwareflag
, int tempflag
,
5689 int thread
, int ignore_count
,
5690 int pending
, int enabled
)
5692 break_command_really (address
, condition
, thread
,
5693 0 /* condition and thread are valid. */,
5694 tempflag
, hardwareflag
,
5697 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5701 /* Adjust SAL to the first instruction past the function prologue.
5702 The end of the prologue is determined using the line table from
5703 the debugging information.
5705 If SAL is already past the prologue, then do nothing. */
5708 skip_prologue_sal (struct symtab_and_line
*sal
)
5710 struct symbol
*sym
= find_pc_function (sal
->pc
);
5711 struct symtab_and_line start_sal
;
5716 start_sal
= find_function_start_sal (sym
, 1);
5717 if (sal
->pc
< start_sal
.pc
)
5721 /* Helper function for break_command_1 and disassemble_command. */
5724 resolve_sal_pc (struct symtab_and_line
*sal
)
5728 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5730 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5731 error (_("No line %d in file \"%s\"."),
5732 sal
->line
, sal
->symtab
->filename
);
5735 /* If this SAL corresponds to a breakpoint inserted using
5736 a line number, then skip the function prologue if necessary. */
5737 if (sal
->explicit_line
)
5738 skip_prologue_sal (sal
);
5741 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5743 struct blockvector
*bv
;
5747 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5750 sym
= block_linkage_function (b
);
5753 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5754 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
5758 /* It really is worthwhile to have the section, so we'll just
5759 have to look harder. This case can be executed if we have
5760 line numbers but no functions (as can happen in assembly
5763 struct minimal_symbol
*msym
;
5765 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5767 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
5774 break_command (char *arg
, int from_tty
)
5776 break_command_1 (arg
, 0, from_tty
);
5780 tbreak_command (char *arg
, int from_tty
)
5782 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5786 hbreak_command (char *arg
, int from_tty
)
5788 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5792 thbreak_command (char *arg
, int from_tty
)
5794 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5798 stop_command (char *arg
, int from_tty
)
5800 printf_filtered (_("Specify the type of breakpoint to set.\n\
5801 Usage: stop in <function | address>\n\
5802 stop at <line>\n"));
5806 stopin_command (char *arg
, int from_tty
)
5810 if (arg
== (char *) NULL
)
5812 else if (*arg
!= '*')
5817 /* look for a ':'. If this is a line number specification, then
5818 say it is bad, otherwise, it should be an address or
5819 function/method name */
5820 while (*argptr
&& !hasColon
)
5822 hasColon
= (*argptr
== ':');
5827 badInput
= (*argptr
!= ':'); /* Not a class::method */
5829 badInput
= isdigit (*arg
); /* a simple line number */
5833 printf_filtered (_("Usage: stop in <function | address>\n"));
5835 break_command_1 (arg
, 0, from_tty
);
5839 stopat_command (char *arg
, int from_tty
)
5843 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5850 /* look for a ':'. If there is a '::' then get out, otherwise
5851 it is probably a line number. */
5852 while (*argptr
&& !hasColon
)
5854 hasColon
= (*argptr
== ':');
5859 badInput
= (*argptr
== ':'); /* we have class::method */
5861 badInput
= !isdigit (*arg
); /* not a line number */
5865 printf_filtered (_("Usage: stop at <line>\n"));
5867 break_command_1 (arg
, 0, from_tty
);
5870 /* accessflag: hw_write: watch write,
5871 hw_read: watch read,
5872 hw_access: watch access (read or write) */
5874 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5876 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
5877 struct symtab_and_line sal
;
5878 struct expression
*exp
;
5879 struct block
*exp_valid_block
;
5880 struct value
*val
, *mark
;
5881 struct frame_info
*frame
;
5882 struct frame_info
*prev_frame
= NULL
;
5883 char *exp_start
= NULL
;
5884 char *exp_end
= NULL
;
5885 char *tok
, *id_tok_start
, *end_tok
;
5887 char *cond_start
= NULL
;
5888 char *cond_end
= NULL
;
5889 struct expression
*cond
= NULL
;
5890 int i
, other_type_used
, target_resources_ok
= 0;
5891 enum bptype bp_type
;
5895 init_sal (&sal
); /* initialize to zeroes */
5897 /* Make sure that we actually have parameters to parse. */
5898 if (arg
!= NULL
&& arg
[0] != '\0')
5900 toklen
= strlen (arg
); /* Size of argument list. */
5902 /* Points tok to the end of the argument list. */
5903 tok
= arg
+ toklen
- 1;
5905 /* Go backwards in the parameters list. Skip the last parameter.
5906 If we're expecting a 'thread <thread_num>' parameter, this should
5907 be the thread identifier. */
5908 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5910 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5913 /* Points end_tok to the beginning of the last token. */
5914 id_tok_start
= tok
+ 1;
5916 /* Go backwards in the parameters list. Skip one more parameter.
5917 If we're expecting a 'thread <thread_num>' parameter, we should
5918 reach a "thread" token. */
5919 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5924 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5927 /* Move the pointer forward to skip the whitespace and
5928 calculate the length of the token. */
5930 toklen
= end_tok
- tok
;
5932 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5934 /* At this point we've found a "thread" token, which means
5935 the user is trying to set a watchpoint that triggers
5936 only in a specific thread. */
5939 /* Extract the thread ID from the next token. */
5940 thread
= strtol (id_tok_start
, &endp
, 0);
5942 /* Check if the user provided a valid numeric value for the
5944 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
5945 error (_("Invalid thread ID specification %s."), id_tok_start
);
5947 /* Check if the thread actually exists. */
5948 if (!valid_thread_id (thread
))
5949 error (_("Unknown thread %d."), thread
);
5951 /* Truncate the string and get rid of the thread <thread_num>
5952 parameter before the parameter list is parsed by the
5953 evaluate_expression() function. */
5958 /* Parse the rest of the arguments. */
5959 innermost_block
= NULL
;
5961 exp
= parse_exp_1 (&arg
, 0, 0);
5963 /* Remove trailing whitespace from the expression before saving it.
5964 This makes the eventual display of the expression string a bit
5966 while (exp_end
> exp_start
&& (exp_end
[-1] == ' ' || exp_end
[-1] == '\t'))
5969 exp_valid_block
= innermost_block
;
5970 mark
= value_mark ();
5971 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
5973 release_value (val
);
5976 while (*tok
== ' ' || *tok
== '\t')
5980 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5983 toklen
= end_tok
- tok
;
5984 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5986 tok
= cond_start
= end_tok
+ 1;
5987 cond
= parse_exp_1 (&tok
, 0, 0);
5991 error (_("Junk at end of command."));
5993 if (accessflag
== hw_read
)
5994 bp_type
= bp_read_watchpoint
;
5995 else if (accessflag
== hw_access
)
5996 bp_type
= bp_access_watchpoint
;
5998 bp_type
= bp_hardware_watchpoint
;
6000 mem_cnt
= can_use_hardware_watchpoint (val
);
6001 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
6002 error (_("Expression cannot be implemented with read/access watchpoint."));
6005 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
6006 target_resources_ok
=
6007 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
6009 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
6010 error (_("Target does not support this type of hardware watchpoint."));
6012 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
6013 error (_("Target can only support one kind of HW watchpoint at a time."));
6016 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
6017 watchpoint could not be set. */
6018 if (!mem_cnt
|| target_resources_ok
<= 0)
6019 bp_type
= bp_watchpoint
;
6021 frame
= block_innermost_frame (exp_valid_block
);
6023 prev_frame
= get_prev_frame (frame
);
6027 /* If the expression is "local", then set up a "watchpoint scope"
6028 breakpoint at the point where we've left the scope of the watchpoint
6029 expression. Create the scope breakpoint before the watchpoint, so
6030 that we will encounter it first in bpstat_stop_status. */
6031 if (innermost_block
&& prev_frame
)
6033 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
6034 bp_watchpoint_scope
);
6036 scope_breakpoint
->enable_state
= bp_enabled
;
6038 /* Automatically delete the breakpoint when it hits. */
6039 scope_breakpoint
->disposition
= disp_del
;
6041 /* Only break in the proper frame (help with recursion). */
6042 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
6044 /* Set the address at which we will stop. */
6045 scope_breakpoint
->loc
->requested_address
6046 = get_frame_pc (prev_frame
);
6047 scope_breakpoint
->loc
->address
6048 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
6049 scope_breakpoint
->type
);
6052 /* Now set up the breakpoint. */
6053 b
= set_raw_breakpoint (sal
, bp_type
);
6054 set_breakpoint_count (breakpoint_count
+ 1);
6055 b
->number
= breakpoint_count
;
6057 b
->disposition
= disp_donttouch
;
6059 b
->exp_valid_block
= exp_valid_block
;
6060 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6063 b
->loc
->cond
= cond
;
6065 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6070 b
->watchpoint_frame
= get_frame_id (frame
);
6072 b
->watchpoint_frame
= null_frame_id
;
6074 if (scope_breakpoint
!= NULL
)
6076 /* The scope breakpoint is related to the watchpoint. We will
6077 need to act on them together. */
6078 b
->related_breakpoint
= scope_breakpoint
;
6079 scope_breakpoint
->related_breakpoint
= b
;
6082 value_free_to_mark (mark
);
6084 update_global_location_list (1);
6087 /* Return count of locations need to be watched and can be handled
6088 in hardware. If the watchpoint can not be handled
6089 in hardware return zero. */
6092 can_use_hardware_watchpoint (struct value
*v
)
6094 int found_memory_cnt
= 0;
6095 struct value
*head
= v
;
6097 /* Did the user specifically forbid us to use hardware watchpoints? */
6098 if (!can_use_hw_watchpoints
)
6101 /* Make sure that the value of the expression depends only upon
6102 memory contents, and values computed from them within GDB. If we
6103 find any register references or function calls, we can't use a
6104 hardware watchpoint.
6106 The idea here is that evaluating an expression generates a series
6107 of values, one holding the value of every subexpression. (The
6108 expression a*b+c has five subexpressions: a, b, a*b, c, and
6109 a*b+c.) GDB's values hold almost enough information to establish
6110 the criteria given above --- they identify memory lvalues,
6111 register lvalues, computed values, etcetera. So we can evaluate
6112 the expression, and then scan the chain of values that leaves
6113 behind to decide whether we can detect any possible change to the
6114 expression's final value using only hardware watchpoints.
6116 However, I don't think that the values returned by inferior
6117 function calls are special in any way. So this function may not
6118 notice that an expression involving an inferior function call
6119 can't be watched with hardware watchpoints. FIXME. */
6120 for (; v
; v
= value_next (v
))
6122 if (VALUE_LVAL (v
) == lval_memory
)
6125 /* A lazy memory lvalue is one that GDB never needed to fetch;
6126 we either just used its address (e.g., `a' in `a.b') or
6127 we never needed it at all (e.g., `a' in `a,b'). */
6131 /* Ahh, memory we actually used! Check if we can cover
6132 it with hardware watchpoints. */
6133 struct type
*vtype
= check_typedef (value_type (v
));
6135 /* We only watch structs and arrays if user asked for it
6136 explicitly, never if they just happen to appear in a
6137 middle of some value chain. */
6139 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6140 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6142 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
6143 int len
= TYPE_LENGTH (value_type (v
));
6145 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6152 else if (VALUE_LVAL (v
) != not_lval
6153 && deprecated_value_modifiable (v
) == 0)
6154 return 0; /* ??? What does this represent? */
6155 else if (VALUE_LVAL (v
) == lval_register
)
6156 return 0; /* cannot watch a register with a HW watchpoint */
6159 /* The expression itself looks suitable for using a hardware
6160 watchpoint, but give the target machine a chance to reject it. */
6161 return found_memory_cnt
;
6165 watch_command_wrapper (char *arg
, int from_tty
)
6167 watch_command (arg
, from_tty
);
6171 watch_command (char *arg
, int from_tty
)
6173 watch_command_1 (arg
, hw_write
, from_tty
);
6177 rwatch_command_wrapper (char *arg
, int from_tty
)
6179 rwatch_command (arg
, from_tty
);
6183 rwatch_command (char *arg
, int from_tty
)
6185 watch_command_1 (arg
, hw_read
, from_tty
);
6189 awatch_command_wrapper (char *arg
, int from_tty
)
6191 awatch_command (arg
, from_tty
);
6195 awatch_command (char *arg
, int from_tty
)
6197 watch_command_1 (arg
, hw_access
, from_tty
);
6201 /* Helper routines for the until_command routine in infcmd.c. Here
6202 because it uses the mechanisms of breakpoints. */
6204 struct until_break_command_continuation_args
6206 struct breakpoint
*breakpoint
;
6207 struct breakpoint
*breakpoint2
;
6210 /* This function is called by fetch_inferior_event via the
6211 cmd_continuation pointer, to complete the until command. It takes
6212 care of cleaning up the temporary breakpoints set up by the until
6215 until_break_command_continuation (void *arg
)
6217 struct until_break_command_continuation_args
*a
= arg
;
6219 delete_breakpoint (a
->breakpoint
);
6221 delete_breakpoint (a
->breakpoint2
);
6225 until_break_command (char *arg
, int from_tty
, int anywhere
)
6227 struct symtabs_and_lines sals
;
6228 struct symtab_and_line sal
;
6229 struct frame_info
*frame
= get_selected_frame (NULL
);
6230 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6231 struct breakpoint
*breakpoint
;
6232 struct breakpoint
*breakpoint2
= NULL
;
6233 struct cleanup
*old_chain
;
6235 clear_proceed_status ();
6237 /* Set a breakpoint where the user wants it and at return from
6240 if (default_breakpoint_valid
)
6241 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6242 default_breakpoint_line
, (char ***) NULL
, NULL
);
6244 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6245 0, (char ***) NULL
, NULL
);
6247 if (sals
.nelts
!= 1)
6248 error (_("Couldn't get information on specified line."));
6251 xfree (sals
.sals
); /* malloc'd, so freed */
6254 error (_("Junk at end of arguments."));
6256 resolve_sal_pc (&sal
);
6259 /* If the user told us to continue until a specified location,
6260 we don't specify a frame at which we need to stop. */
6261 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6263 /* Otherwise, specify the current frame, because we want to stop only
6264 at the very same frame. */
6265 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6268 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6270 /* Keep within the current frame, or in frames called by the current
6274 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6275 sal
.pc
= get_frame_pc (prev_frame
);
6276 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6278 make_cleanup_delete_breakpoint (breakpoint2
);
6281 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6283 /* If we are running asynchronously, and proceed call above has actually
6284 managed to start the target, arrange for breakpoints to be
6285 deleted when the target stops. Otherwise, we're already stopped and
6286 delete breakpoints via cleanup chain. */
6288 if (target_can_async_p () && is_running (inferior_ptid
))
6290 struct until_break_command_continuation_args
*args
;
6291 args
= xmalloc (sizeof (*args
));
6293 args
->breakpoint
= breakpoint
;
6294 args
->breakpoint2
= breakpoint2
;
6296 discard_cleanups (old_chain
);
6297 add_continuation (inferior_thread (),
6298 until_break_command_continuation
, args
,
6302 do_cleanups (old_chain
);
6306 ep_skip_leading_whitespace (char **s
)
6308 if ((s
== NULL
) || (*s
== NULL
))
6310 while (isspace (**s
))
6314 /* This function attempts to parse an optional "if <cond>" clause
6315 from the arg string. If one is not found, it returns NULL.
6317 Else, it returns a pointer to the condition string. (It does not
6318 attempt to evaluate the string against a particular block.) And,
6319 it updates arg to point to the first character following the parsed
6320 if clause in the arg string. */
6323 ep_parse_optional_if_clause (char **arg
)
6327 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6330 /* Skip the "if" keyword. */
6333 /* Skip any extra leading whitespace, and record the start of the
6334 condition string. */
6335 ep_skip_leading_whitespace (arg
);
6338 /* Assume that the condition occupies the remainder of the arg string. */
6339 (*arg
) += strlen (cond_string
);
6344 /* This function attempts to parse an optional filename from the arg
6345 string. If one is not found, it returns NULL.
6347 Else, it returns a pointer to the parsed filename. (This function
6348 makes no attempt to verify that a file of that name exists, or is
6349 accessible.) And, it updates arg to point to the first character
6350 following the parsed filename in the arg string.
6352 Note that clients needing to preserve the returned filename for
6353 future access should copy it to their own buffers. */
6355 ep_parse_optional_filename (char **arg
)
6357 static char filename
[1024];
6362 if ((*arg_p
== '\0') || isspace (*arg_p
))
6380 /* Commands to deal with catching events, such as signals, exceptions,
6381 process start/exit, etc. */
6385 catch_fork_temporary
, catch_vfork_temporary
,
6386 catch_fork_permanent
, catch_vfork_permanent
6391 catch_fork_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6393 char *cond_string
= NULL
;
6394 catch_fork_kind fork_kind
;
6397 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
6398 tempflag
= (fork_kind
== catch_fork_temporary
6399 || fork_kind
== catch_vfork_temporary
);
6403 ep_skip_leading_whitespace (&arg
);
6405 /* The allowed syntax is:
6407 catch [v]fork if <cond>
6409 First, check if there's an if clause. */
6410 cond_string
= ep_parse_optional_if_clause (&arg
);
6412 if ((*arg
!= '\0') && !isspace (*arg
))
6413 error (_("Junk at end of arguments."));
6415 /* If this target supports it, create a fork or vfork catchpoint
6416 and enable reporting of such events. */
6419 case catch_fork_temporary
:
6420 case catch_fork_permanent
:
6421 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6422 &catch_fork_breakpoint_ops
);
6424 case catch_vfork_temporary
:
6425 case catch_vfork_permanent
:
6426 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6427 &catch_vfork_breakpoint_ops
);
6430 error (_("unsupported or unknown fork kind; cannot catch it"));
6436 catch_exec_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6439 char *cond_string
= NULL
;
6441 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6445 ep_skip_leading_whitespace (&arg
);
6447 /* The allowed syntax is:
6449 catch exec if <cond>
6451 First, check if there's an if clause. */
6452 cond_string
= ep_parse_optional_if_clause (&arg
);
6454 if ((*arg
!= '\0') && !isspace (*arg
))
6455 error (_("Junk at end of arguments."));
6457 /* If this target supports it, create an exec catchpoint
6458 and enable reporting of such events. */
6459 create_catchpoint (tempflag
, cond_string
, &catch_exec_breakpoint_ops
);
6462 static enum print_stop_action
6463 print_exception_catchpoint (struct breakpoint
*b
)
6465 int bp_temp
, bp_throw
;
6467 annotate_catchpoint (b
->number
);
6469 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6470 if (b
->loc
->address
!= b
->loc
->requested_address
)
6471 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6474 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6476 bp_temp
? "Temporary catchpoint "
6478 if (!ui_out_is_mi_like_p (uiout
))
6479 ui_out_field_int (uiout
, "bkptno", b
->number
);
6481 bp_throw
? " (exception thrown), "
6482 : " (exception caught), ");
6483 if (ui_out_is_mi_like_p (uiout
))
6485 ui_out_field_string (uiout
, "reason",
6486 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6487 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6488 ui_out_field_int (uiout
, "bkptno", b
->number
);
6490 return PRINT_SRC_AND_LOC
;
6494 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6496 struct value_print_options opts
;
6497 get_user_print_options (&opts
);
6498 if (opts
.addressprint
)
6501 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6502 ui_out_field_string (uiout
, "addr", "<PENDING>");
6504 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6508 *last_addr
= b
->loc
->address
;
6509 if (strstr (b
->addr_string
, "throw") != NULL
)
6510 ui_out_field_string (uiout
, "what", "exception throw");
6512 ui_out_field_string (uiout
, "what", "exception catch");
6516 print_mention_exception_catchpoint (struct breakpoint
*b
)
6521 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6522 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6523 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6524 : _("Catchpoint "));
6525 ui_out_field_int (uiout
, "bkptno", b
->number
);
6526 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6530 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6533 NULL
, /* breakpoint_hit */
6534 print_exception_catchpoint
,
6535 print_one_exception_catchpoint
,
6536 print_mention_exception_catchpoint
6540 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6541 enum exception_event_kind ex_event
, int from_tty
)
6543 char *trigger_func_name
;
6545 if (ex_event
== EX_EVENT_CATCH
)
6546 trigger_func_name
= "__cxa_begin_catch";
6548 trigger_func_name
= "__cxa_throw";
6550 break_command_really (trigger_func_name
, cond_string
, -1,
6551 0 /* condition and thread are valid. */,
6554 AUTO_BOOLEAN_TRUE
/* pending */,
6555 &gnu_v3_exception_catchpoint_ops
, from_tty
,
6561 /* Deal with "catch catch" and "catch throw" commands */
6564 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6565 int tempflag
, int from_tty
)
6567 char *cond_string
= NULL
;
6568 struct symtab_and_line
*sal
= NULL
;
6572 ep_skip_leading_whitespace (&arg
);
6574 cond_string
= ep_parse_optional_if_clause (&arg
);
6576 if ((*arg
!= '\0') && !isspace (*arg
))
6577 error (_("Junk at end of arguments."));
6579 if ((ex_event
!= EX_EVENT_THROW
) &&
6580 (ex_event
!= EX_EVENT_CATCH
))
6581 error (_("Unsupported or unknown exception event; cannot catch it"));
6583 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6586 warning (_("Unsupported with this platform/compiler combination."));
6589 /* Implementation of "catch catch" command. */
6592 catch_catch_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6594 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6595 catch_exception_command_1 (EX_EVENT_CATCH
, arg
, tempflag
, from_tty
);
6598 /* Implementation of "catch throw" command. */
6601 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6603 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6604 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
6607 /* Create a breakpoint struct for Ada exception catchpoints. */
6610 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6614 struct expression
*cond
,
6615 struct breakpoint_ops
*ops
,
6619 struct breakpoint
*b
;
6623 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6624 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6625 version for exception catchpoints, because two catchpoints
6626 used for different exception names will use the same address.
6627 In this case, a "breakpoint ... also set at..." warning is
6628 unproductive. Besides. the warning phrasing is also a bit
6629 inapropriate, we should use the word catchpoint, and tell
6630 the user what type of catchpoint it is. The above is good
6631 enough for now, though. */
6634 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6635 set_breakpoint_count (breakpoint_count
+ 1);
6637 b
->enable_state
= bp_enabled
;
6638 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6639 b
->number
= breakpoint_count
;
6640 b
->ignore_count
= 0;
6641 b
->loc
->cond
= cond
;
6642 b
->addr_string
= addr_string
;
6643 b
->language
= language_ada
;
6644 b
->cond_string
= cond_string
;
6645 b
->exp_string
= exp_string
;
6650 update_global_location_list (1);
6653 /* Implement the "catch exception" command. */
6656 catch_ada_exception_command (char *arg
, int from_tty
,
6657 struct cmd_list_element
*command
)
6660 struct symtab_and_line sal
;
6662 char *addr_string
= NULL
;
6663 char *exp_string
= NULL
;
6664 char *cond_string
= NULL
;
6665 struct expression
*cond
= NULL
;
6666 struct breakpoint_ops
*ops
= NULL
;
6668 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6672 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6673 &cond_string
, &cond
, &ops
);
6674 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6675 cond_string
, cond
, ops
, tempflag
,
6679 /* Implement the "catch assert" command. */
6682 catch_assert_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6685 struct symtab_and_line sal
;
6686 char *addr_string
= NULL
;
6687 struct breakpoint_ops
*ops
= NULL
;
6689 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6693 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6694 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6695 tempflag
, from_tty
);
6699 catch_command (char *arg
, int from_tty
)
6701 error (_("Catch requires an event name."));
6706 tcatch_command (char *arg
, int from_tty
)
6708 error (_("Catch requires an event name."));
6711 /* Delete breakpoints by address or line. */
6714 clear_command (char *arg
, int from_tty
)
6716 struct breakpoint
*b
;
6717 VEC(breakpoint_p
) *found
= 0;
6720 struct symtabs_and_lines sals
;
6721 struct symtab_and_line sal
;
6726 sals
= decode_line_spec (arg
, 1);
6731 sals
.sals
= (struct symtab_and_line
*)
6732 xmalloc (sizeof (struct symtab_and_line
));
6733 make_cleanup (xfree
, sals
.sals
);
6734 init_sal (&sal
); /* initialize to zeroes */
6735 sal
.line
= default_breakpoint_line
;
6736 sal
.symtab
= default_breakpoint_symtab
;
6737 sal
.pc
= default_breakpoint_address
;
6738 if (sal
.symtab
== 0)
6739 error (_("No source file specified."));
6747 /* We don't call resolve_sal_pc here. That's not
6748 as bad as it seems, because all existing breakpoints
6749 typically have both file/line and pc set. So, if
6750 clear is given file/line, we can match this to existing
6751 breakpoint without obtaining pc at all.
6753 We only support clearing given the address explicitly
6754 present in breakpoint table. Say, we've set breakpoint
6755 at file:line. There were several PC values for that file:line,
6756 due to optimization, all in one block.
6757 We've picked one PC value. If "clear" is issued with another
6758 PC corresponding to the same file:line, the breakpoint won't
6759 be cleared. We probably can still clear the breakpoint, but
6760 since the other PC value is never presented to user, user
6761 can only find it by guessing, and it does not seem important
6764 /* For each line spec given, delete bps which correspond
6765 to it. Do it in two passes, solely to preserve the current
6766 behavior that from_tty is forced true if we delete more than
6770 for (i
= 0; i
< sals
.nelts
; i
++)
6772 /* If exact pc given, clear bpts at that pc.
6773 If line given (pc == 0), clear all bpts on specified line.
6774 If defaulting, clear all bpts on default line
6777 defaulting sal.pc != 0 tests to do
6782 1 0 <can't happen> */
6786 /* Find all matching breakpoints and add them to
6791 /* Are we going to delete b? */
6792 if (b
->type
!= bp_none
6793 && b
->type
!= bp_watchpoint
6794 && b
->type
!= bp_hardware_watchpoint
6795 && b
->type
!= bp_read_watchpoint
6796 && b
->type
!= bp_access_watchpoint
)
6798 struct bp_location
*loc
= b
->loc
;
6799 for (; loc
; loc
= loc
->next
)
6801 int pc_match
= sal
.pc
6802 && (loc
->address
== sal
.pc
)
6803 && (!section_is_overlay (loc
->section
)
6804 || loc
->section
== sal
.section
);
6805 int line_match
= ((default_match
|| (0 == sal
.pc
))
6806 && b
->source_file
!= NULL
6807 && sal
.symtab
!= NULL
6808 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6809 && b
->line_number
== sal
.line
);
6810 if (pc_match
|| line_match
)
6819 VEC_safe_push(breakpoint_p
, found
, b
);
6822 /* Now go thru the 'found' chain and delete them. */
6823 if (VEC_empty(breakpoint_p
, found
))
6826 error (_("No breakpoint at %s."), arg
);
6828 error (_("No breakpoint at this line."));
6831 if (VEC_length(breakpoint_p
, found
) > 1)
6832 from_tty
= 1; /* Always report if deleted more than one */
6835 if (VEC_length(breakpoint_p
, found
) == 1)
6836 printf_unfiltered (_("Deleted breakpoint "));
6838 printf_unfiltered (_("Deleted breakpoints "));
6840 breakpoints_changed ();
6842 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6845 printf_unfiltered ("%d ", b
->number
);
6846 delete_breakpoint (b
);
6849 putchar_unfiltered ('\n');
6852 /* Delete breakpoint in BS if they are `delete' breakpoints and
6853 all breakpoints that are marked for deletion, whether hit or not.
6854 This is called after any breakpoint is hit, or after errors. */
6857 breakpoint_auto_delete (bpstat bs
)
6859 struct breakpoint
*b
, *temp
;
6861 for (; bs
; bs
= bs
->next
)
6862 if (bs
->breakpoint_at
6863 && bs
->breakpoint_at
->owner
6864 && bs
->breakpoint_at
->owner
->disposition
== disp_del
6866 delete_breakpoint (bs
->breakpoint_at
->owner
);
6868 ALL_BREAKPOINTS_SAFE (b
, temp
)
6870 if (b
->disposition
== disp_del_at_next_stop
)
6871 delete_breakpoint (b
);
6875 /* A cleanup function which destroys a vector. */
6878 do_vec_free (void *p
)
6880 VEC(bp_location_p
) **vec
= p
;
6882 VEC_free (bp_location_p
, *vec
);
6885 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
6886 into the inferior, only remove already-inserted locations that no
6887 longer should be inserted. Functions that delete a breakpoint or
6888 breakpoints should pass false, so that deleting a breakpoint
6889 doesn't have the side effect of inserting the locations of other
6890 breakpoints that are marked not-inserted, but should_be_inserted
6891 returns true on them.
6893 This behaviour is useful is situations close to tear-down -- e.g.,
6894 after an exec, while the target still has execution, but breakpoint
6895 shadows of the previous executable image should *NOT* be restored
6896 to the new image; or before detaching, where the target still has
6897 execution and wants to delete breakpoints from GDB's lists, and all
6898 breakpoints had already been removed from the inferior. */
6901 update_global_location_list (int should_insert
)
6903 struct breakpoint
*b
;
6904 struct bp_location
**next
= &bp_location_chain
;
6905 struct bp_location
*loc
;
6906 struct bp_location
*loc2
;
6907 VEC(bp_location_p
) *old_locations
= NULL
;
6910 struct cleanup
*cleanups
;
6912 cleanups
= make_cleanup (do_vec_free
, &old_locations
);
6913 /* Store old locations for future reference. */
6914 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
6915 VEC_safe_push (bp_location_p
, old_locations
, loc
);
6917 bp_location_chain
= NULL
;
6920 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
6923 next
= &(loc
->global_next
);
6928 /* Identify bp_location instances that are no longer present in the new
6929 list, and therefore should be freed. Note that it's not necessary that
6930 those locations should be removed from inferior -- if there's another
6931 location at the same address (previously marked as duplicate),
6932 we don't need to remove/insert the location. */
6933 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
6935 /* Tells if 'loc' is found amoung the new locations. If not, we
6937 int found_object
= 0;
6938 /* Tells if the location should remain inserted in the target. */
6939 int keep_in_target
= 0;
6941 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
6948 /* If this location is no longer present, and inserted, look if there's
6949 maybe a new location at the same address. If so, mark that one
6950 inserted, and don't remove this one. This is needed so that we
6951 don't have a time window where a breakpoint at certain location is not
6956 /* If the location is inserted now, we might have to remove it. */
6958 if (found_object
&& should_be_inserted (loc
))
6960 /* The location is still present in the location list, and still
6961 should be inserted. Don't do anything. */
6966 /* The location is either no longer present, or got disabled.
6967 See if there's another location at the same address, in which
6968 case we don't need to remove this one from the target. */
6969 if (breakpoint_address_is_meaningful (loc
->owner
))
6970 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
6972 /* For the sake of should_insert_location. The
6973 call to check_duplicates will fix up this later. */
6974 loc2
->duplicate
= 0;
6975 if (should_be_inserted (loc2
)
6976 && loc2
!= loc
&& loc2
->address
== loc
->address
)
6979 loc2
->target_info
= loc
->target_info
;
6986 if (!keep_in_target
)
6988 if (remove_breakpoint (loc
, mark_uninserted
))
6990 /* This is just about all we can do. We could keep this
6991 location on the global list, and try to remove it next
6992 time, but there's no particular reason why we will
6995 Note that at this point, loc->owner is still valid,
6996 as delete_breakpoint frees the breakpoint only
6997 after calling us. */
6998 printf_filtered (_("warning: Error removing breakpoint %d\n"),
6999 loc
->owner
->number
);
7007 if (removed
&& non_stop
)
7009 /* This location was removed from the targets. In non-stop mode,
7010 a race condition is possible where we've removed a breakpoint,
7011 but stop events for that breakpoint are already queued and will
7012 arrive later. To suppress spurious SIGTRAPs reported to user,
7013 we keep this breakpoint location for a bit, and will retire it
7014 after we see 3 * thread_count events.
7015 The theory here is that reporting of events should,
7016 "on the average", be fair, so after that many event we'll see
7017 events from all threads that have anything of interest, and no
7018 longer need to keep this breakpoint. This is just a
7019 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7020 which is usability issue, but not a correctness problem. */
7021 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7024 VEC_safe_push (bp_location_p
, moribund_locations
, loc
);
7027 free_bp_location (loc
);
7033 check_duplicates (b
);
7036 if (breakpoints_always_inserted_mode () && should_insert
7037 && (target_has_execution
7038 || (gdbarch_has_global_solist (target_gdbarch
)
7039 && target_supports_multi_process ())))
7040 insert_breakpoint_locations ();
7042 do_cleanups (cleanups
);
7046 breakpoint_retire_moribund (void)
7048 struct bp_location
*loc
;
7051 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7052 if (--(loc
->events_till_retirement
) == 0)
7054 free_bp_location (loc
);
7055 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7061 update_global_location_list_nothrow (int inserting
)
7063 struct gdb_exception e
;
7064 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7065 update_global_location_list (inserting
);
7068 /* Clear BPT from a BPS. */
7070 bpstat_remove_breakpoint (bpstat bps
, struct breakpoint
*bpt
)
7073 for (bs
= bps
; bs
; bs
= bs
->next
)
7074 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7076 bs
->breakpoint_at
= NULL
;
7078 /* bs->commands will be freed later. */
7082 /* Callback for iterate_over_threads. */
7084 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
7086 struct breakpoint
*bpt
= data
;
7087 bpstat_remove_breakpoint (th
->stop_bpstat
, bpt
);
7091 /* Delete a breakpoint and clean up all traces of it in the data
7095 delete_breakpoint (struct breakpoint
*bpt
)
7097 struct breakpoint
*b
;
7098 struct bp_location
*loc
, *next
;
7100 gdb_assert (bpt
!= NULL
);
7102 /* Has this bp already been deleted? This can happen because multiple
7103 lists can hold pointers to bp's. bpstat lists are especial culprits.
7105 One example of this happening is a watchpoint's scope bp. When the
7106 scope bp triggers, we notice that the watchpoint is out of scope, and
7107 delete it. We also delete its scope bp. But the scope bp is marked
7108 "auto-deleting", and is already on a bpstat. That bpstat is then
7109 checked for auto-deleting bp's, which are deleted.
7111 A real solution to this problem might involve reference counts in bp's,
7112 and/or giving them pointers back to their referencing bpstat's, and
7113 teaching delete_breakpoint to only free a bp's storage when no more
7114 references were extent. A cheaper bandaid was chosen. */
7115 if (bpt
->type
== bp_none
)
7118 observer_notify_breakpoint_deleted (bpt
->number
);
7120 if (breakpoint_chain
== bpt
)
7121 breakpoint_chain
= bpt
->next
;
7126 b
->next
= bpt
->next
;
7130 free_command_lines (&bpt
->commands
);
7131 if (bpt
->cond_string
!= NULL
)
7132 xfree (bpt
->cond_string
);
7133 if (bpt
->addr_string
!= NULL
)
7134 xfree (bpt
->addr_string
);
7135 if (bpt
->exp
!= NULL
)
7137 if (bpt
->exp_string
!= NULL
)
7138 xfree (bpt
->exp_string
);
7139 if (bpt
->val
!= NULL
)
7140 value_free (bpt
->val
);
7141 if (bpt
->source_file
!= NULL
)
7142 xfree (bpt
->source_file
);
7143 if (bpt
->exec_pathname
!= NULL
)
7144 xfree (bpt
->exec_pathname
);
7146 /* Be sure no bpstat's are pointing at it after it's been freed. */
7147 /* FIXME, how can we find all bpstat's?
7148 We just check stop_bpstat for now. Note that we cannot just
7149 remove bpstats pointing at bpt from the stop_bpstat list
7150 entirely, as breakpoint commands are associated with the bpstat;
7151 if we remove it here, then the later call to
7152 bpstat_do_actions (&stop_bpstat);
7153 in event-top.c won't do anything, and temporary breakpoints
7154 with commands won't work. */
7156 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
7158 /* Now that breakpoint is removed from breakpoint
7159 list, update the global location list. This
7160 will remove locations that used to belong to
7161 this breakpoint. Do this before freeing
7162 the breakpoint itself, since remove_breakpoint
7163 looks at location's owner. It might be better
7164 design to have location completely self-contained,
7165 but it's not the case now. */
7166 update_global_location_list (0);
7169 /* On the chance that someone will soon try again to delete this same
7170 bp, we mark it as deleted before freeing its storage. */
7171 bpt
->type
= bp_none
;
7177 do_delete_breakpoint_cleanup (void *b
)
7179 delete_breakpoint (b
);
7183 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7185 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7189 delete_command (char *arg
, int from_tty
)
7191 struct breakpoint
*b
, *temp
;
7197 int breaks_to_delete
= 0;
7199 /* Delete all breakpoints if no argument.
7200 Do not delete internal or call-dummy breakpoints, these
7201 have to be deleted with an explicit breakpoint number argument. */
7204 if (b
->type
!= bp_call_dummy
&&
7205 b
->type
!= bp_shlib_event
&&
7206 b
->type
!= bp_thread_event
&&
7207 b
->type
!= bp_overlay_event
&&
7210 breaks_to_delete
= 1;
7215 /* Ask user only if there are some breakpoints to delete. */
7217 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7219 ALL_BREAKPOINTS_SAFE (b
, temp
)
7221 if (b
->type
!= bp_call_dummy
&&
7222 b
->type
!= bp_shlib_event
&&
7223 b
->type
!= bp_thread_event
&&
7224 b
->type
!= bp_overlay_event
&&
7226 delete_breakpoint (b
);
7231 map_breakpoint_numbers (arg
, delete_breakpoint
);
7235 all_locations_are_pending (struct bp_location
*loc
)
7237 for (; loc
; loc
= loc
->next
)
7238 if (!loc
->shlib_disabled
)
7243 /* Subroutine of update_breakpoint_locations to simplify it.
7244 Return non-zero if multiple fns in list LOC have the same name.
7245 Null names are ignored. */
7248 ambiguous_names_p (struct bp_location
*loc
)
7250 struct bp_location
*l
;
7251 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7252 (int (*) (const void *, const void *)) streq
,
7253 NULL
, xcalloc
, xfree
);
7255 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7258 const char *name
= l
->function_name
;
7260 /* Allow for some names to be NULL, ignore them. */
7264 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7266 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7281 update_breakpoint_locations (struct breakpoint
*b
,
7282 struct symtabs_and_lines sals
)
7286 struct bp_location
*existing_locations
= b
->loc
;
7288 /* If there's no new locations, and all existing locations
7289 are pending, don't do anything. This optimizes
7290 the common case where all locations are in the same
7291 shared library, that was unloaded. We'd like to
7292 retain the location, so that when the library
7293 is loaded again, we don't loose the enabled/disabled
7294 status of the individual locations. */
7295 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7300 for (i
= 0; i
< sals
.nelts
; ++i
)
7302 struct bp_location
*new_loc
=
7303 add_location_to_breakpoint (b
, &(sals
.sals
[i
]));
7305 /* Reparse conditions, they might contain references to the
7307 if (b
->cond_string
!= NULL
)
7309 struct gdb_exception e
;
7312 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7314 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7319 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7320 b
->number
, e
.message
);
7321 new_loc
->enabled
= 0;
7325 if (b
->source_file
!= NULL
)
7326 xfree (b
->source_file
);
7327 if (sals
.sals
[i
].symtab
== NULL
)
7328 b
->source_file
= NULL
;
7331 savestring (sals
.sals
[i
].symtab
->filename
,
7332 strlen (sals
.sals
[i
].symtab
->filename
));
7334 if (b
->line_number
== 0)
7335 b
->line_number
= sals
.sals
[i
].line
;
7338 /* Update locations of permanent breakpoints. */
7339 if (b
->enable_state
== bp_permanent
)
7340 make_breakpoint_permanent (b
);
7342 /* If possible, carry over 'disable' status from existing breakpoints. */
7344 struct bp_location
*e
= existing_locations
;
7345 /* If there are multiple breakpoints with the same function name,
7346 e.g. for inline functions, comparing function names won't work.
7347 Instead compare pc addresses; this is just a heuristic as things
7348 may have moved, but in practice it gives the correct answer
7349 often enough until a better solution is found. */
7350 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7352 for (; e
; e
= e
->next
)
7354 if (!e
->enabled
&& e
->function_name
)
7356 struct bp_location
*l
= b
->loc
;
7357 if (have_ambiguous_names
)
7359 for (; l
; l
= l
->next
)
7360 if (e
->address
== l
->address
)
7368 for (; l
; l
= l
->next
)
7369 if (l
->function_name
7370 && strcmp (e
->function_name
, l
->function_name
) == 0)
7380 update_global_location_list (1);
7384 /* Reset a breakpoint given it's struct breakpoint * BINT.
7385 The value we return ends up being the return value from catch_errors.
7386 Unused in this case. */
7389 breakpoint_re_set_one (void *bint
)
7391 /* get past catch_errs */
7392 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7396 int *not_found_ptr
= ¬_found
;
7397 struct symtabs_and_lines sals
= {};
7398 struct symtabs_and_lines expanded
;
7400 enum enable_state save_enable
;
7401 struct gdb_exception e
;
7402 struct cleanup
*cleanups
;
7407 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7411 case bp_hardware_breakpoint
:
7412 if (b
->addr_string
== NULL
)
7414 /* Anything without a string can't be re-set. */
7415 delete_breakpoint (b
);
7419 set_language (b
->language
);
7420 input_radix
= b
->input_radix
;
7422 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7424 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7429 int not_found_and_ok
= 0;
7430 /* For pending breakpoints, it's expected that parsing
7431 will fail until the right shared library is loaded.
7432 User has already told to create pending breakpoints and
7433 don't need extra messages. If breakpoint is in bp_shlib_disabled
7434 state, then user already saw the message about that breakpoint
7435 being disabled, and don't want to see more errors. */
7437 && (b
->condition_not_parsed
7438 || (b
->loc
&& b
->loc
->shlib_disabled
)
7439 || b
->enable_state
== bp_disabled
))
7440 not_found_and_ok
= 1;
7442 if (!not_found_and_ok
)
7444 /* We surely don't want to warn about the same breakpoint
7445 10 times. One solution, implemented here, is disable
7446 the breakpoint on error. Another solution would be to
7447 have separate 'warning emitted' flag. Since this
7448 happens only when a binary has changed, I don't know
7449 which approach is better. */
7450 b
->enable_state
= bp_disabled
;
7451 throw_exception (e
);
7458 gdb_assert (sals
.nelts
== 1);
7459 resolve_sal_pc (&sals
.sals
[0]);
7460 if (b
->condition_not_parsed
&& s
&& s
[0])
7462 char *cond_string
= 0;
7464 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7465 &cond_string
, &thread
);
7467 b
->cond_string
= cond_string
;
7469 b
->condition_not_parsed
= 0;
7471 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7472 cleanups
= make_cleanup (xfree
, sals
.sals
);
7473 update_breakpoint_locations (b
, expanded
);
7474 do_cleanups (cleanups
);
7478 case bp_hardware_watchpoint
:
7479 case bp_read_watchpoint
:
7480 case bp_access_watchpoint
:
7481 /* Watchpoint can be either on expression using entirely global variables,
7482 or it can be on local variables.
7484 Watchpoints of the first kind are never auto-deleted, and even persist
7485 across program restarts. Since they can use variables from shared
7486 libraries, we need to reparse expression as libraries are loaded
7489 Watchpoints on local variables can also change meaning as result
7490 of solib event. For example, if a watchpoint uses both a local and
7491 a global variables in expression, it's a local watchpoint, but
7492 unloading of a shared library will make the expression invalid.
7493 This is not a very common use case, but we still re-evaluate
7494 expression, to avoid surprises to the user.
7496 Note that for local watchpoints, we re-evaluate it only if
7497 watchpoints frame id is still valid. If it's not, it means
7498 the watchpoint is out of scope and will be deleted soon. In fact,
7499 I'm not sure we'll ever be called in this case.
7501 If a local watchpoint's frame id is still valid, then
7502 b->exp_valid_block is likewise valid, and we can safely use it.
7504 Don't do anything about disabled watchpoints, since they will
7505 be reevaluated again when enabled. */
7506 update_watchpoint (b
, 1 /* reparse */);
7508 /* We needn't really do anything to reset these, since the mask
7509 that requests them is unaffected by e.g., new libraries being
7515 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7517 /* Delete overlay event breakpoints; they will be reset later by
7518 breakpoint_re_set. */
7519 case bp_overlay_event
:
7520 delete_breakpoint (b
);
7523 /* This breakpoint is special, it's set up when the inferior
7524 starts and we really don't want to touch it. */
7525 case bp_shlib_event
:
7527 /* Like bp_shlib_event, this breakpoint type is special.
7528 Once it is set up, we do not want to touch it. */
7529 case bp_thread_event
:
7531 /* Keep temporary breakpoints, which can be encountered when we step
7532 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7533 Otherwise these should have been blown away via the cleanup chain
7534 or by breakpoint_init_inferior when we rerun the executable. */
7537 case bp_watchpoint_scope
:
7539 case bp_step_resume
:
7541 case bp_longjmp_resume
:
7548 /* Re-set all breakpoints after symbols have been re-loaded. */
7550 breakpoint_re_set (void)
7552 struct breakpoint
*b
, *temp
;
7553 enum language save_language
;
7554 int save_input_radix
;
7556 save_language
= current_language
->la_language
;
7557 save_input_radix
= input_radix
;
7558 ALL_BREAKPOINTS_SAFE (b
, temp
)
7560 /* Format possible error msg */
7561 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7563 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7564 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7565 do_cleanups (cleanups
);
7567 set_language (save_language
);
7568 input_radix
= save_input_radix
;
7570 create_overlay_event_breakpoint ("_ovly_debug_event");
7573 /* Reset the thread number of this breakpoint:
7575 - If the breakpoint is for all threads, leave it as-is.
7576 - Else, reset it to the current thread for inferior_ptid. */
7578 breakpoint_re_set_thread (struct breakpoint
*b
)
7580 if (b
->thread
!= -1)
7582 if (in_thread_list (inferior_ptid
))
7583 b
->thread
= pid_to_thread_id (inferior_ptid
);
7587 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7588 If from_tty is nonzero, it prints a message to that effect,
7589 which ends with a period (no newline). */
7592 set_ignore_count (int bptnum
, int count
, int from_tty
)
7594 struct breakpoint
*b
;
7600 if (b
->number
== bptnum
)
7602 b
->ignore_count
= count
;
7606 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7608 else if (count
== 1)
7609 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7612 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7615 breakpoints_changed ();
7616 observer_notify_breakpoint_modified (b
->number
);
7620 error (_("No breakpoint number %d."), bptnum
);
7624 make_breakpoint_silent (struct breakpoint
*b
)
7626 /* Silence the breakpoint. */
7630 /* Command to set ignore-count of breakpoint N to COUNT. */
7633 ignore_command (char *args
, int from_tty
)
7639 error_no_arg (_("a breakpoint number"));
7641 num
= get_number (&p
);
7643 error (_("bad breakpoint number: '%s'"), args
);
7645 error (_("Second argument (specified ignore-count) is missing."));
7647 set_ignore_count (num
,
7648 longest_to_int (value_as_long (parse_and_eval (p
))),
7651 printf_filtered ("\n");
7654 /* Call FUNCTION on each of the breakpoints
7655 whose numbers are given in ARGS. */
7658 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7663 struct breakpoint
*b
, *tmp
;
7667 error_no_arg (_("one or more breakpoint numbers"));
7674 num
= get_number_or_range (&p1
);
7677 warning (_("bad breakpoint number at or near '%s'"), p
);
7681 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7682 if (b
->number
== num
)
7684 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7687 if (related_breakpoint
)
7688 function (related_breakpoint
);
7692 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7698 static struct bp_location
*
7699 find_location_by_number (char *number
)
7701 char *dot
= strchr (number
, '.');
7705 struct breakpoint
*b
;
7706 struct bp_location
*loc
;
7711 bp_num
= get_number_or_range (&p1
);
7713 error (_("Bad breakpoint number '%s'"), number
);
7716 if (b
->number
== bp_num
)
7721 if (!b
|| b
->number
!= bp_num
)
7722 error (_("Bad breakpoint number '%s'"), number
);
7725 loc_num
= get_number_or_range (&p1
);
7727 error (_("Bad breakpoint location number '%s'"), number
);
7731 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7734 error (_("Bad breakpoint location number '%s'"), dot
+1);
7740 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7741 If from_tty is nonzero, it prints a message to that effect,
7742 which ends with a period (no newline). */
7745 disable_breakpoint (struct breakpoint
*bpt
)
7747 /* Never disable a watchpoint scope breakpoint; we want to
7748 hit them when we leave scope so we can delete both the
7749 watchpoint and its scope breakpoint at that time. */
7750 if (bpt
->type
== bp_watchpoint_scope
)
7753 /* You can't disable permanent breakpoints. */
7754 if (bpt
->enable_state
== bp_permanent
)
7757 bpt
->enable_state
= bp_disabled
;
7759 update_global_location_list (0);
7761 observer_notify_breakpoint_modified (bpt
->number
);
7765 disable_command (char *args
, int from_tty
)
7767 struct breakpoint
*bpt
;
7769 ALL_BREAKPOINTS (bpt
)
7773 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7778 case bp_hardware_breakpoint
:
7780 case bp_hardware_watchpoint
:
7781 case bp_read_watchpoint
:
7782 case bp_access_watchpoint
:
7783 disable_breakpoint (bpt
);
7787 else if (strchr (args
, '.'))
7789 struct bp_location
*loc
= find_location_by_number (args
);
7792 update_global_location_list (0);
7795 map_breakpoint_numbers (args
, disable_breakpoint
);
7799 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7801 int target_resources_ok
, other_type_used
;
7804 if (bpt
->type
== bp_hardware_breakpoint
)
7807 i
= hw_breakpoint_used_count ();
7808 target_resources_ok
=
7809 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7811 if (target_resources_ok
== 0)
7812 error (_("No hardware breakpoint support in the target."));
7813 else if (target_resources_ok
< 0)
7814 error (_("Hardware breakpoints used exceeds limit."));
7817 if (bpt
->type
== bp_watchpoint
||
7818 bpt
->type
== bp_hardware_watchpoint
||
7819 bpt
->type
== bp_read_watchpoint
||
7820 bpt
->type
== bp_access_watchpoint
)
7822 struct gdb_exception e
;
7824 TRY_CATCH (e
, RETURN_MASK_ALL
)
7826 update_watchpoint (bpt
, 1 /* reparse */);
7830 exception_fprintf (gdb_stderr
, e
, _("Cannot enable watchpoint %d: "),
7836 if (bpt
->enable_state
!= bp_permanent
)
7837 bpt
->enable_state
= bp_enabled
;
7838 bpt
->disposition
= disposition
;
7839 update_global_location_list (1);
7840 breakpoints_changed ();
7842 observer_notify_breakpoint_modified (bpt
->number
);
7847 enable_breakpoint (struct breakpoint
*bpt
)
7849 do_enable_breakpoint (bpt
, bpt
->disposition
);
7852 /* The enable command enables the specified breakpoints (or all defined
7853 breakpoints) so they once again become (or continue to be) effective
7854 in stopping the inferior. */
7857 enable_command (char *args
, int from_tty
)
7859 struct breakpoint
*bpt
;
7861 ALL_BREAKPOINTS (bpt
)
7865 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7870 case bp_hardware_breakpoint
:
7872 case bp_hardware_watchpoint
:
7873 case bp_read_watchpoint
:
7874 case bp_access_watchpoint
:
7875 enable_breakpoint (bpt
);
7879 else if (strchr (args
, '.'))
7881 struct bp_location
*loc
= find_location_by_number (args
);
7884 update_global_location_list (1);
7887 map_breakpoint_numbers (args
, enable_breakpoint
);
7891 enable_once_breakpoint (struct breakpoint
*bpt
)
7893 do_enable_breakpoint (bpt
, disp_disable
);
7897 enable_once_command (char *args
, int from_tty
)
7899 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7903 enable_delete_breakpoint (struct breakpoint
*bpt
)
7905 do_enable_breakpoint (bpt
, disp_del
);
7909 enable_delete_command (char *args
, int from_tty
)
7911 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7915 set_breakpoint_cmd (char *args
, int from_tty
)
7920 show_breakpoint_cmd (char *args
, int from_tty
)
7924 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7926 struct symtabs_and_lines
7927 decode_line_spec_1 (char *string
, int funfirstline
)
7929 struct symtabs_and_lines sals
;
7931 error (_("Empty line specification."));
7932 if (default_breakpoint_valid
)
7933 sals
= decode_line_1 (&string
, funfirstline
,
7934 default_breakpoint_symtab
,
7935 default_breakpoint_line
,
7936 (char ***) NULL
, NULL
);
7938 sals
= decode_line_1 (&string
, funfirstline
,
7939 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7941 error (_("Junk at end of line specification: %s"), string
);
7945 /* Create and insert a raw software breakpoint at PC. Return an
7946 identifier, which should be used to remove the breakpoint later.
7947 In general, places which call this should be using something on the
7948 breakpoint chain instead; this function should be eliminated
7952 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
7954 struct bp_target_info
*bp_tgt
;
7956 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
7957 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
7959 bp_tgt
->placed_address
= pc
;
7960 if (target_insert_breakpoint (bp_tgt
) != 0)
7962 /* Could not insert the breakpoint. */
7970 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
7973 deprecated_remove_raw_breakpoint (void *bp
)
7975 struct bp_target_info
*bp_tgt
= bp
;
7978 ret
= target_remove_breakpoint (bp_tgt
);
7984 /* One (or perhaps two) breakpoints used for software single stepping. */
7986 static void *single_step_breakpoints
[2];
7988 /* Create and insert a breakpoint for software single step. */
7991 insert_single_step_breakpoint (CORE_ADDR next_pc
)
7995 if (single_step_breakpoints
[0] == NULL
)
7996 bpt_p
= &single_step_breakpoints
[0];
7999 gdb_assert (single_step_breakpoints
[1] == NULL
);
8000 bpt_p
= &single_step_breakpoints
[1];
8003 /* NOTE drow/2006-04-11: A future improvement to this function would be
8004 to only create the breakpoints once, and actually put them on the
8005 breakpoint chain. That would let us use set_raw_breakpoint. We could
8006 adjust the addresses each time they were needed. Doing this requires
8007 corresponding changes elsewhere where single step breakpoints are
8008 handled, however. So, for now, we use this. */
8010 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
8012 error (_("Could not insert single-step breakpoint at 0x%s"),
8013 paddr_nz (next_pc
));
8016 /* Remove and delete any breakpoints used for software single step. */
8019 remove_single_step_breakpoints (void)
8021 gdb_assert (single_step_breakpoints
[0] != NULL
);
8023 /* See insert_single_step_breakpoint for more about this deprecated
8025 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8026 single_step_breakpoints
[0] = NULL
;
8028 if (single_step_breakpoints
[1] != NULL
)
8030 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8031 single_step_breakpoints
[1] = NULL
;
8035 /* Check whether a software single-step breakpoint is inserted at PC. */
8038 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8042 for (i
= 0; i
< 2; i
++)
8044 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8045 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8053 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8054 It is defined as a macro to prevent duplication.
8055 COMMAND should be a string constant containing the name of the command. */
8056 #define BREAK_ARGS_HELP(command) \
8057 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8058 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8059 If a line number is specified, break at start of code for that line.\n\
8060 If a function is specified, break at start of code for that function.\n\
8061 If an address is specified, break at that exact address.\n\
8062 With no LOCATION, uses current execution address of selected stack frame.\n\
8063 This is useful for breaking on return to a stack frame.\n\
8065 THREADNUM is the number from \"info threads\".\n\
8066 CONDITION is a boolean expression.\n\
8068 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8070 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8072 /* List of subcommands for "catch". */
8073 static struct cmd_list_element
*catch_cmdlist
;
8075 /* List of subcommands for "tcatch". */
8076 static struct cmd_list_element
*tcatch_cmdlist
;
8078 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
8079 lists, and pass some additional user data to the command function. */
8081 add_catch_command (char *name
, char *docstring
,
8082 void (*sfunc
) (char *args
, int from_tty
,
8083 struct cmd_list_element
*command
),
8084 void *user_data_catch
,
8085 void *user_data_tcatch
)
8087 struct cmd_list_element
*command
;
8089 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8091 set_cmd_sfunc (command
, sfunc
);
8092 set_cmd_context (command
, user_data_catch
);
8094 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8096 set_cmd_sfunc (command
, sfunc
);
8097 set_cmd_context (command
, user_data_tcatch
);
8101 _initialize_breakpoint (void)
8103 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8104 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8105 struct cmd_list_element
*c
;
8107 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8109 breakpoint_chain
= 0;
8110 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8111 before a breakpoint is set. */
8112 breakpoint_count
= 0;
8114 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8115 Set ignore-count of breakpoint number N to COUNT.\n\
8116 Usage is `ignore N COUNT'."));
8118 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8120 add_com ("commands", class_breakpoint
, commands_command
, _("\
8121 Set commands to be executed when a breakpoint is hit.\n\
8122 Give breakpoint number as argument after \"commands\".\n\
8123 With no argument, the targeted breakpoint is the last one set.\n\
8124 The commands themselves follow starting on the next line.\n\
8125 Type a line containing \"end\" to indicate the end of them.\n\
8126 Give \"silent\" as the first line to make the breakpoint silent;\n\
8127 then no output is printed when it is hit, except what the commands print."));
8129 add_com ("condition", class_breakpoint
, condition_command
, _("\
8130 Specify breakpoint number N to break only if COND is true.\n\
8131 Usage is `condition N COND', where N is an integer and COND is an\n\
8132 expression to be evaluated whenever breakpoint N is reached."));
8134 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8135 Set a temporary breakpoint.\n\
8136 Like \"break\" except the breakpoint is only temporary,\n\
8137 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8138 by using \"enable delete\" on the breakpoint number.\n\
8140 BREAK_ARGS_HELP ("tbreak")));
8141 set_cmd_completer (c
, location_completer
);
8143 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8144 Set a hardware assisted breakpoint.\n\
8145 Like \"break\" except the breakpoint requires hardware support,\n\
8146 some target hardware may not have this support.\n\
8148 BREAK_ARGS_HELP ("hbreak")));
8149 set_cmd_completer (c
, location_completer
);
8151 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8152 Set a temporary hardware assisted breakpoint.\n\
8153 Like \"hbreak\" except the breakpoint is only temporary,\n\
8154 so it will be deleted when hit.\n\
8156 BREAK_ARGS_HELP ("thbreak")));
8157 set_cmd_completer (c
, location_completer
);
8159 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8160 Enable some breakpoints.\n\
8161 Give breakpoint numbers (separated by spaces) as arguments.\n\
8162 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8163 This is used to cancel the effect of the \"disable\" command.\n\
8164 With a subcommand you can enable temporarily."),
8165 &enablelist
, "enable ", 1, &cmdlist
);
8167 add_com ("ab", class_breakpoint
, enable_command
, _("\
8168 Enable some breakpoints.\n\
8169 Give breakpoint numbers (separated by spaces) as arguments.\n\
8170 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8171 This is used to cancel the effect of the \"disable\" command.\n\
8172 With a subcommand you can enable temporarily."));
8174 add_com_alias ("en", "enable", class_breakpoint
, 1);
8176 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8177 Enable some breakpoints.\n\
8178 Give breakpoint numbers (separated by spaces) as arguments.\n\
8179 This is used to cancel the effect of the \"disable\" command.\n\
8180 May be abbreviated to simply \"enable\".\n"),
8181 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8183 add_cmd ("once", no_class
, enable_once_command
, _("\
8184 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8185 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8188 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8189 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8190 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8193 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8194 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8195 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8198 add_cmd ("once", no_class
, enable_once_command
, _("\
8199 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8200 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8203 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8204 Disable some breakpoints.\n\
8205 Arguments are breakpoint numbers with spaces in between.\n\
8206 To disable all breakpoints, give no argument.\n\
8207 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8208 &disablelist
, "disable ", 1, &cmdlist
);
8209 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8210 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8212 add_com ("sb", class_breakpoint
, disable_command
, _("\
8213 Disable some breakpoints.\n\
8214 Arguments are breakpoint numbers with spaces in between.\n\
8215 To disable all breakpoints, give no argument.\n\
8216 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8218 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8219 Disable some breakpoints.\n\
8220 Arguments are breakpoint numbers with spaces in between.\n\
8221 To disable all breakpoints, give no argument.\n\
8222 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8223 This command may be abbreviated \"disable\"."),
8226 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8227 Delete some breakpoints or auto-display expressions.\n\
8228 Arguments are breakpoint numbers with spaces in between.\n\
8229 To delete all breakpoints, give no argument.\n\
8231 Also a prefix command for deletion of other GDB objects.\n\
8232 The \"unset\" command is also an alias for \"delete\"."),
8233 &deletelist
, "delete ", 1, &cmdlist
);
8234 add_com_alias ("d", "delete", class_breakpoint
, 1);
8235 add_com_alias ("del", "delete", class_breakpoint
, 1);
8237 add_com ("db", class_breakpoint
, delete_command
, _("\
8238 Delete some breakpoints.\n\
8239 Arguments are breakpoint numbers with spaces in between.\n\
8240 To delete all breakpoints, give no argument.\n"));
8242 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8243 Delete some breakpoints or auto-display expressions.\n\
8244 Arguments are breakpoint numbers with spaces in between.\n\
8245 To delete all breakpoints, give no argument.\n\
8246 This command may be abbreviated \"delete\"."),
8249 add_com ("clear", class_breakpoint
, clear_command
, _("\
8250 Clear breakpoint at specified line or function.\n\
8251 Argument may be line number, function name, or \"*\" and an address.\n\
8252 If line number is specified, all breakpoints in that line are cleared.\n\
8253 If function is specified, breakpoints at beginning of function are cleared.\n\
8254 If an address is specified, breakpoints at that address are cleared.\n\
8256 With no argument, clears all breakpoints in the line that the selected frame\n\
8259 See also the \"delete\" command which clears breakpoints by number."));
8261 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8262 Set breakpoint at specified line or function.\n"
8263 BREAK_ARGS_HELP ("break")));
8264 set_cmd_completer (c
, location_completer
);
8266 add_com_alias ("b", "break", class_run
, 1);
8267 add_com_alias ("br", "break", class_run
, 1);
8268 add_com_alias ("bre", "break", class_run
, 1);
8269 add_com_alias ("brea", "break", class_run
, 1);
8273 add_com_alias ("ba", "break", class_breakpoint
, 1);
8274 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8279 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8280 Break in function/address or break at a line in the current file."),
8281 &stoplist
, "stop ", 1, &cmdlist
);
8282 add_cmd ("in", class_breakpoint
, stopin_command
,
8283 _("Break in function or address."), &stoplist
);
8284 add_cmd ("at", class_breakpoint
, stopat_command
,
8285 _("Break at a line in the current file."), &stoplist
);
8286 add_com ("status", class_info
, breakpoints_info
, _("\
8287 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8288 The \"Type\" column indicates one of:\n\
8289 \tbreakpoint - normal breakpoint\n\
8290 \twatchpoint - watchpoint\n\
8291 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8292 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8293 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8294 address and file/line number respectively.\n\
8296 Convenience variable \"$_\" and default examine address for \"x\"\n\
8297 are set to the address of the last breakpoint listed unless the command\n\
8298 is prefixed with \"server \".\n\n\
8299 Convenience variable \"$bpnum\" contains the number of the last\n\
8303 add_info ("breakpoints", breakpoints_info
, _("\
8304 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8305 The \"Type\" column indicates one of:\n\
8306 \tbreakpoint - normal breakpoint\n\
8307 \twatchpoint - watchpoint\n\
8308 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8309 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8310 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8311 address and file/line number respectively.\n\
8313 Convenience variable \"$_\" and default examine address for \"x\"\n\
8314 are set to the address of the last breakpoint listed unless the command\n\
8315 is prefixed with \"server \".\n\n\
8316 Convenience variable \"$bpnum\" contains the number of the last\n\
8320 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8321 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8322 The \"Type\" column indicates one of:\n\
8323 \tbreakpoint - normal breakpoint\n\
8324 \twatchpoint - watchpoint\n\
8325 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8326 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8327 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8328 address and file/line number respectively.\n\
8330 Convenience variable \"$_\" and default examine address for \"x\"\n\
8331 are set to the address of the last breakpoint listed unless the command\n\
8332 is prefixed with \"server \".\n\n\
8333 Convenience variable \"$bpnum\" contains the number of the last\n\
8336 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8337 Status of all breakpoints, or breakpoint number NUMBER.\n\
8338 The \"Type\" column indicates one of:\n\
8339 \tbreakpoint - normal breakpoint\n\
8340 \twatchpoint - watchpoint\n\
8341 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8342 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8343 \tuntil - internal breakpoint used by the \"until\" command\n\
8344 \tfinish - internal breakpoint used by the \"finish\" command\n\
8345 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8346 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8347 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8348 address and file/line number respectively.\n\
8350 Convenience variable \"$_\" and default examine address for \"x\"\n\
8351 are set to the address of the last breakpoint listed unless the command\n\
8352 is prefixed with \"server \".\n\n\
8353 Convenience variable \"$bpnum\" contains the number of the last\n\
8355 &maintenanceinfolist
);
8357 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
8358 Set catchpoints to catch events."),
8359 &catch_cmdlist
, "catch ",
8360 0/*allow-unknown*/, &cmdlist
);
8362 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
8363 Set temporary catchpoints to catch events."),
8364 &tcatch_cmdlist
, "tcatch ",
8365 0/*allow-unknown*/, &cmdlist
);
8367 /* Add catch and tcatch sub-commands. */
8368 add_catch_command ("catch", _("\
8369 Catch an exception, when caught.\n\
8370 With an argument, catch only exceptions with the given name."),
8371 catch_catch_command
,
8374 add_catch_command ("throw", _("\
8375 Catch an exception, when thrown.\n\
8376 With an argument, catch only exceptions with the given name."),
8377 catch_throw_command
,
8380 add_catch_command ("fork", _("Catch calls to fork."),
8381 catch_fork_command_1
,
8382 (void *) (uintptr_t) catch_fork_permanent
,
8383 (void *) (uintptr_t) catch_fork_temporary
);
8384 add_catch_command ("vfork", _("Catch calls to vfork."),
8385 catch_fork_command_1
,
8386 (void *) (uintptr_t) catch_vfork_permanent
,
8387 (void *) (uintptr_t) catch_vfork_temporary
);
8388 add_catch_command ("exec", _("Catch calls to exec."),
8389 catch_exec_command_1
,
8392 add_catch_command ("exception", _("\
8393 Catch Ada exceptions, when raised.\n\
8394 With an argument, catch only exceptions with the given name."),
8395 catch_ada_exception_command
,
8398 add_catch_command ("assert", _("\
8399 Catch failed Ada assertions, when raised.\n\
8400 With an argument, catch only exceptions with the given name."),
8401 catch_assert_command
,
8405 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8406 Set a watchpoint for an expression.\n\
8407 A watchpoint stops execution of your program whenever the value of\n\
8408 an expression changes."));
8409 set_cmd_completer (c
, expression_completer
);
8411 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8412 Set a read watchpoint for an expression.\n\
8413 A watchpoint stops execution of your program whenever the value of\n\
8414 an expression is read."));
8415 set_cmd_completer (c
, expression_completer
);
8417 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8418 Set a watchpoint for an expression.\n\
8419 A watchpoint stops execution of your program whenever the value of\n\
8420 an expression is either read or written."));
8421 set_cmd_completer (c
, expression_completer
);
8423 add_info ("watchpoints", breakpoints_info
,
8424 _("Synonym for ``info breakpoints''."));
8427 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8428 respond to changes - contrary to the description. */
8429 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8430 &can_use_hw_watchpoints
, _("\
8431 Set debugger's willingness to use watchpoint hardware."), _("\
8432 Show debugger's willingness to use watchpoint hardware."), _("\
8433 If zero, gdb will not use hardware for new watchpoints, even if\n\
8434 such is available. (However, any hardware watchpoints that were\n\
8435 created before setting this to nonzero, will continue to use watchpoint\n\
8438 show_can_use_hw_watchpoints
,
8439 &setlist
, &showlist
);
8441 can_use_hw_watchpoints
= 1;
8443 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8444 Breakpoint specific settings\n\
8445 Configure various breakpoint-specific variables such as\n\
8446 pending breakpoint behavior"),
8447 &breakpoint_set_cmdlist
, "set breakpoint ",
8448 0/*allow-unknown*/, &setlist
);
8449 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8450 Breakpoint specific settings\n\
8451 Configure various breakpoint-specific variables such as\n\
8452 pending breakpoint behavior"),
8453 &breakpoint_show_cmdlist
, "show breakpoint ",
8454 0/*allow-unknown*/, &showlist
);
8456 add_setshow_auto_boolean_cmd ("pending", no_class
,
8457 &pending_break_support
, _("\
8458 Set debugger's behavior regarding pending breakpoints."), _("\
8459 Show debugger's behavior regarding pending breakpoints."), _("\
8460 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8461 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8462 an error. If auto, an unrecognized breakpoint location results in a\n\
8463 user-query to see if a pending breakpoint should be created."),
8465 show_pending_break_support
,
8466 &breakpoint_set_cmdlist
,
8467 &breakpoint_show_cmdlist
);
8469 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8471 add_setshow_boolean_cmd ("auto-hw", no_class
,
8472 &automatic_hardware_breakpoints
, _("\
8473 Set automatic usage of hardware breakpoints."), _("\
8474 Show automatic usage of hardware breakpoints."), _("\
8475 If set, the debugger will automatically use hardware breakpoints for\n\
8476 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8477 a warning will be emitted for such breakpoints."),
8479 show_automatic_hardware_breakpoints
,
8480 &breakpoint_set_cmdlist
,
8481 &breakpoint_show_cmdlist
);
8483 add_setshow_enum_cmd ("always-inserted", class_support
,
8484 always_inserted_enums
, &always_inserted_mode
, _("\
8485 Set mode for inserting breakpoints."), _("\
8486 Show mode for inserting breakpoints."), _("\
8487 When this mode is off, breakpoints are inserted in inferior when it is\n\
8488 resumed, and removed when execution stops. When this mode is on,\n\
8489 breakpoints are inserted immediately and removed only when the user\n\
8490 deletes the breakpoint. When this mode is auto (which is the default),\n\
8491 the behaviour depends on the non-stop setting (see help set non-stop).\n\
8492 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
8493 behaves as if always-inserted mode is on; if gdb is controlling the\n\
8494 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
8496 &show_always_inserted_mode
,
8497 &breakpoint_set_cmdlist
,
8498 &breakpoint_show_cmdlist
);
8500 automatic_hardware_breakpoints
= 1;