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 is disabled, do nothing. If this is
839 local watchpoint that is out of scope, delete it. */
841 update_watchpoint (struct breakpoint
*b
, int reparse
)
843 int within_current_scope
;
844 struct frame_id saved_frame_id
;
845 struct bp_location
*loc
;
848 /* We don't free locations. They are stored in bp_location_chain and
849 update_global_locations will eventually delete them and remove
850 breakpoints if needed. */
853 if (b
->disposition
== disp_del_at_next_stop
)
856 /* Save the current frame's ID so we can restore it after
857 evaluating the watchpoint expression on its own frame. */
858 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
859 took a frame parameter, so that we didn't have to change the
861 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
863 /* Determine if the watchpoint is within scope. */
864 if (b
->exp_valid_block
== NULL
)
865 within_current_scope
= 1;
868 struct frame_info
*fi
;
869 fi
= frame_find_by_id (b
->watchpoint_frame
);
870 within_current_scope
= (fi
!= NULL
);
871 if (within_current_scope
)
875 if (within_current_scope
&& reparse
)
884 b
->exp
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
885 /* If the meaning of expression itself changed, the old value is
886 no longer relevant. We don't want to report a watchpoint hit
887 to the user when the old value and the new value may actually
888 be completely different objects. */
894 /* If we failed to parse the expression, for example because
895 it refers to a global variable in a not-yet-loaded shared library,
896 don't try to insert watchpoint. We don't automatically delete
897 such watchpoint, though, since failure to parse expression
898 is different from out-of-scope watchpoint. */
899 if (within_current_scope
&& b
->exp
)
901 struct value
*val_chain
, *v
, *result
, *next
;
903 fetch_watchpoint_value (b
->exp
, &v
, &result
, &val_chain
);
905 /* Avoid setting b->val if it's already set. The meaning of
906 b->val is 'the last value' user saw, and we should update
907 it only if we reported that last value to user. As it
908 happens, the code that reports it updates b->val directly. */
915 /* Change the type of breakpoint between hardware assisted or an
916 ordinary watchpoint depending on the hardware support and free
917 hardware slots. REPARSE is set when the inferior is started. */
918 if ((b
->type
== bp_watchpoint
|| b
->type
== bp_hardware_watchpoint
)
921 int i
, mem_cnt
, other_type_used
;
923 i
= hw_watchpoint_used_count (bp_hardware_watchpoint
,
925 mem_cnt
= can_use_hardware_watchpoint (val_chain
);
928 b
->type
= bp_watchpoint
;
931 int target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT
932 (bp_hardware_watchpoint
, i
+ mem_cnt
, other_type_used
);
933 if (target_resources_ok
<= 0)
934 b
->type
= bp_watchpoint
;
936 b
->type
= bp_hardware_watchpoint
;
940 /* Look at each value on the value chain. */
941 for (v
= val_chain
; v
; v
= next
)
943 /* If it's a memory location, and GDB actually needed
944 its contents to evaluate the expression, then we
945 must watch it. If the first value returned is
946 still lazy, that means an error occurred reading it;
947 watch it anyway in case it becomes readable. */
948 if (VALUE_LVAL (v
) == lval_memory
949 && (v
== val_chain
|| ! value_lazy (v
)))
951 struct type
*vtype
= check_typedef (value_type (v
));
953 /* We only watch structs and arrays if user asked
954 for it explicitly, never if they just happen to
955 appear in the middle of some value chain. */
957 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
958 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
962 struct bp_location
*loc
, **tmp
;
964 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
965 len
= TYPE_LENGTH (value_type (v
));
967 if (b
->type
== bp_read_watchpoint
)
969 else if (b
->type
== bp_access_watchpoint
)
972 loc
= allocate_bp_location (b
);
973 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
978 loc
->watchpoint_type
= type
;
982 next
= value_next (v
);
987 /* We just regenerated the list of breakpoint locations.
988 The new location does not have its condition field set to anything
989 and therefore, we must always reparse the cond_string, independently
990 of the value of the reparse flag. */
991 if (b
->cond_string
!= NULL
)
993 char *s
= b
->cond_string
;
994 b
->loc
->cond
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
997 else if (!within_current_scope
)
999 printf_filtered (_("\
1000 Watchpoint %d deleted because the program has left the block \n\
1001 in which its expression is valid.\n"),
1003 if (b
->related_breakpoint
)
1004 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1005 b
->disposition
= disp_del_at_next_stop
;
1008 /* Restore the selected frame. */
1009 select_frame (frame_find_by_id (saved_frame_id
));
1013 /* Returns 1 iff breakpoint location should be
1014 inserted in the inferior. */
1016 should_be_inserted (struct bp_location
*bpt
)
1018 if (!breakpoint_enabled (bpt
->owner
))
1021 if (bpt
->owner
->disposition
== disp_del_at_next_stop
)
1024 if (!bpt
->enabled
|| bpt
->shlib_disabled
|| bpt
->duplicate
)
1030 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1031 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1032 and HW_BREAKPOINT_ERROR are used to report problems.
1034 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1035 method for each breakpoint or catchpoint type. */
1037 insert_bp_location (struct bp_location
*bpt
,
1038 struct ui_file
*tmp_error_stream
,
1039 int *disabled_breaks
,
1040 int *hw_breakpoint_error
)
1044 if (!should_be_inserted (bpt
) || bpt
->inserted
)
1047 /* Initialize the target-specific information. */
1048 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
1049 bpt
->target_info
.placed_address
= bpt
->address
;
1051 if (bpt
->loc_type
== bp_loc_software_breakpoint
1052 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1054 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
1056 /* If the explicitly specified breakpoint type
1057 is not hardware breakpoint, check the memory map to see
1058 if the breakpoint address is in read only memory or not.
1059 Two important cases are:
1060 - location type is not hardware breakpoint, memory
1061 is readonly. We change the type of the location to
1062 hardware breakpoint.
1063 - location type is hardware breakpoint, memory is read-write.
1064 This means we've previously made the location hardware one, but
1065 then the memory map changed, so we undo.
1067 When breakpoints are removed, remove_breakpoints will
1068 use location types we've just set here, the only possible
1069 problem is that memory map has changed during running program,
1070 but it's not going to work anyway with current gdb. */
1071 struct mem_region
*mr
1072 = lookup_mem_region (bpt
->target_info
.placed_address
);
1076 if (automatic_hardware_breakpoints
)
1079 enum bp_loc_type new_type
;
1081 if (mr
->attrib
.mode
!= MEM_RW
)
1082 new_type
= bp_loc_hardware_breakpoint
;
1084 new_type
= bp_loc_software_breakpoint
;
1086 if (new_type
!= bpt
->loc_type
)
1088 static int said
= 0;
1089 bpt
->loc_type
= new_type
;
1092 fprintf_filtered (gdb_stdout
, _("\
1093 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1098 else if (bpt
->loc_type
== bp_loc_software_breakpoint
1099 && mr
->attrib
.mode
!= MEM_RW
)
1100 warning (_("cannot set software breakpoint at readonly address %s"),
1101 paddr (bpt
->address
));
1105 /* First check to see if we have to handle an overlay. */
1106 if (overlay_debugging
== ovly_off
1107 || bpt
->section
== NULL
1108 || !(section_is_overlay (bpt
->section
)))
1110 /* No overlay handling: just set the breakpoint. */
1112 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1113 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1115 val
= target_insert_breakpoint (&bpt
->target_info
);
1119 /* This breakpoint is in an overlay section.
1120 Shall we set a breakpoint at the LMA? */
1121 if (!overlay_events_enabled
)
1123 /* Yes -- overlay event support is not active,
1124 so we must try to set a breakpoint at the LMA.
1125 This will not work for a hardware breakpoint. */
1126 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1127 warning (_("hardware breakpoint %d not supported in overlay!"),
1128 bpt
->owner
->number
);
1131 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
1133 /* Set a software (trap) breakpoint at the LMA. */
1134 bpt
->overlay_target_info
= bpt
->target_info
;
1135 bpt
->overlay_target_info
.placed_address
= addr
;
1136 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
1138 fprintf_unfiltered (tmp_error_stream
,
1139 "Overlay breakpoint %d failed: in ROM?",
1140 bpt
->owner
->number
);
1143 /* Shall we set a breakpoint at the VMA? */
1144 if (section_is_mapped (bpt
->section
))
1146 /* Yes. This overlay section is mapped into memory. */
1147 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1148 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1150 val
= target_insert_breakpoint (&bpt
->target_info
);
1154 /* No. This breakpoint will not be inserted.
1155 No error, but do not mark the bp as 'inserted'. */
1162 /* Can't set the breakpoint. */
1163 if (solib_address (bpt
->address
))
1165 /* See also: disable_breakpoints_in_shlibs. */
1167 bpt
->shlib_disabled
= 1;
1168 if (!*disabled_breaks
)
1170 fprintf_unfiltered (tmp_error_stream
,
1171 "Cannot insert breakpoint %d.\n",
1172 bpt
->owner
->number
);
1173 fprintf_unfiltered (tmp_error_stream
,
1174 "Temporarily disabling shared library breakpoints:\n");
1176 *disabled_breaks
= 1;
1177 fprintf_unfiltered (tmp_error_stream
,
1178 "breakpoint #%d\n", bpt
->owner
->number
);
1182 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1184 *hw_breakpoint_error
= 1;
1185 fprintf_unfiltered (tmp_error_stream
,
1186 "Cannot insert hardware breakpoint %d.\n",
1187 bpt
->owner
->number
);
1191 fprintf_unfiltered (tmp_error_stream
,
1192 "Cannot insert breakpoint %d.\n",
1193 bpt
->owner
->number
);
1194 fprintf_filtered (tmp_error_stream
,
1195 "Error accessing memory address ");
1196 fputs_filtered (paddress (bpt
->address
), tmp_error_stream
);
1197 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1198 safe_strerror (val
));
1209 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
1210 /* NOTE drow/2003-09-08: This state only exists for removing
1211 watchpoints. It's not clear that it's necessary... */
1212 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
1214 val
= target_insert_watchpoint (bpt
->address
,
1216 bpt
->watchpoint_type
);
1217 bpt
->inserted
= (val
!= -1);
1220 else if (bpt
->owner
->type
== bp_catchpoint
)
1222 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1223 bpt
->owner
, RETURN_MASK_ERROR
);
1224 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1225 bpt
->owner
->number
);
1227 bpt
->owner
->enable_state
= bp_disabled
;
1231 /* We've already printed an error message if there was a problem
1232 inserting this catchpoint, and we've disabled the catchpoint,
1233 so just return success. */
1240 /* Make sure all breakpoints are inserted in inferior.
1241 Throws exception on any error.
1242 A breakpoint that is already inserted won't be inserted
1243 again, so calling this function twice is safe. */
1245 insert_breakpoints (void)
1247 struct breakpoint
*bpt
;
1249 ALL_BREAKPOINTS (bpt
)
1250 if (is_hardware_watchpoint (bpt
))
1251 update_watchpoint (bpt
, 0 /* don't reparse. */);
1253 update_global_location_list (1);
1255 if (!breakpoints_always_inserted_mode ()
1256 && (target_has_execution
1257 || (gdbarch_has_global_solist (target_gdbarch
)
1258 && target_supports_multi_process ())))
1259 /* update_global_location_list does not insert breakpoints
1260 when always_inserted_mode is not enabled. Explicitly
1262 insert_breakpoint_locations ();
1265 /* insert_breakpoints is used when starting or continuing the program.
1266 remove_breakpoints is used when the program stops.
1267 Both return zero if successful,
1268 or an `errno' value if could not write the inferior. */
1271 insert_breakpoint_locations (void)
1273 struct breakpoint
*bpt
;
1274 struct bp_location
*b
, *temp
;
1277 int disabled_breaks
= 0;
1278 int hw_breakpoint_error
= 0;
1280 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1281 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (tmp_error_stream
);
1283 /* Explicitly mark the warning -- this will only be printed if
1284 there was an error. */
1285 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1287 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1289 if (!should_be_inserted (b
) || b
->inserted
)
1292 /* There is no point inserting thread-specific breakpoints if the
1293 thread no longer exists. */
1294 if (b
->owner
->thread
!= -1
1295 && !valid_thread_id (b
->owner
->thread
))
1298 val
= insert_bp_location (b
, tmp_error_stream
,
1300 &hw_breakpoint_error
);
1305 /* If we failed to insert all locations of a watchpoint,
1306 remove them, as half-inserted watchpoint is of limited use. */
1307 ALL_BREAKPOINTS (bpt
)
1309 int some_failed
= 0;
1310 struct bp_location
*loc
;
1312 if (!is_hardware_watchpoint (bpt
))
1315 if (!breakpoint_enabled (bpt
))
1318 if (bpt
->disposition
== disp_del_at_next_stop
)
1321 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1329 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1331 remove_breakpoint (loc
, mark_uninserted
);
1333 hw_breakpoint_error
= 1;
1334 fprintf_unfiltered (tmp_error_stream
,
1335 "Could not insert hardware watchpoint %d.\n",
1343 /* If a hardware breakpoint or watchpoint was inserted, add a
1344 message about possibly exhausted resources. */
1345 if (hw_breakpoint_error
)
1347 fprintf_unfiltered (tmp_error_stream
,
1348 "Could not insert hardware breakpoints:\n\
1349 You may have requested too many hardware breakpoints/watchpoints.\n");
1351 target_terminal_ours_for_output ();
1352 error_stream (tmp_error_stream
);
1355 do_cleanups (cleanups
);
1359 remove_breakpoints (void)
1361 struct bp_location
*b
;
1364 ALL_BP_LOCATIONS (b
)
1368 val
= remove_breakpoint (b
, mark_uninserted
);
1377 remove_hw_watchpoints (void)
1379 struct bp_location
*b
;
1382 ALL_BP_LOCATIONS (b
)
1384 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1386 val
= remove_breakpoint (b
, mark_uninserted
);
1395 reattach_breakpoints (int pid
)
1397 struct bp_location
*b
;
1399 struct cleanup
*old_chain
= save_inferior_ptid ();
1400 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1401 int dummy1
= 0, dummy2
= 0;
1403 make_cleanup_ui_file_delete (tmp_error_stream
);
1405 inferior_ptid
= pid_to_ptid (pid
);
1406 ALL_BP_LOCATIONS (b
)
1411 val
= insert_bp_location (b
, tmp_error_stream
,
1415 do_cleanups (old_chain
);
1420 do_cleanups (old_chain
);
1425 update_breakpoints_after_exec (void)
1427 struct breakpoint
*b
;
1428 struct breakpoint
*temp
;
1429 struct bp_location
*bploc
;
1431 /* We're about to delete breakpoints from GDB's lists. If the
1432 INSERTED flag is true, GDB will try to lift the breakpoints by
1433 writing the breakpoints' "shadow contents" back into memory. The
1434 "shadow contents" are NOT valid after an exec, so GDB should not
1435 do that. Instead, the target is responsible from marking
1436 breakpoints out as soon as it detects an exec. We don't do that
1437 here instead, because there may be other attempts to delete
1438 breakpoints after detecting an exec and before reaching here. */
1439 ALL_BP_LOCATIONS (bploc
)
1440 gdb_assert (!bploc
->inserted
);
1442 ALL_BREAKPOINTS_SAFE (b
, temp
)
1444 /* Solib breakpoints must be explicitly reset after an exec(). */
1445 if (b
->type
== bp_shlib_event
)
1447 delete_breakpoint (b
);
1451 /* Thread event breakpoints must be set anew after an exec(),
1452 as must overlay event breakpoints. */
1453 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1455 delete_breakpoint (b
);
1459 /* Step-resume breakpoints are meaningless after an exec(). */
1460 if (b
->type
== bp_step_resume
)
1462 delete_breakpoint (b
);
1466 /* Longjmp and longjmp-resume breakpoints are also meaningless
1468 if (b
->type
== bp_longjmp
|| b
->type
== bp_longjmp_resume
)
1470 delete_breakpoint (b
);
1474 if (b
->type
== bp_catchpoint
)
1476 /* For now, none of the bp_catchpoint breakpoints need to
1477 do anything at this point. In the future, if some of
1478 the catchpoints need to something, we will need to add
1479 a new method, and call this method from here. */
1483 /* bp_finish is a special case. The only way we ought to be able
1484 to see one of these when an exec() has happened, is if the user
1485 caught a vfork, and then said "finish". Ordinarily a finish just
1486 carries them to the call-site of the current callee, by setting
1487 a temporary bp there and resuming. But in this case, the finish
1488 will carry them entirely through the vfork & exec.
1490 We don't want to allow a bp_finish to remain inserted now. But
1491 we can't safely delete it, 'cause finish_command has a handle to
1492 the bp on a bpstat, and will later want to delete it. There's a
1493 chance (and I've seen it happen) that if we delete the bp_finish
1494 here, that its storage will get reused by the time finish_command
1495 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1496 We really must allow finish_command to delete a bp_finish.
1498 In the absense of a general solution for the "how do we know
1499 it's safe to delete something others may have handles to?"
1500 problem, what we'll do here is just uninsert the bp_finish, and
1501 let finish_command delete it.
1503 (We know the bp_finish is "doomed" in the sense that it's
1504 momentary, and will be deleted as soon as finish_command sees
1505 the inferior stopped. So it doesn't matter that the bp's
1506 address is probably bogus in the new a.out, unlike e.g., the
1507 solib breakpoints.) */
1509 if (b
->type
== bp_finish
)
1514 /* Without a symbolic address, we have little hope of the
1515 pre-exec() address meaning the same thing in the post-exec()
1517 if (b
->addr_string
== NULL
)
1519 delete_breakpoint (b
);
1523 /* FIXME what about longjmp breakpoints? Re-create them here? */
1524 create_overlay_event_breakpoint ("_ovly_debug_event");
1528 detach_breakpoints (int pid
)
1530 struct bp_location
*b
;
1532 struct cleanup
*old_chain
= save_inferior_ptid ();
1534 if (pid
== PIDGET (inferior_ptid
))
1535 error (_("Cannot detach breakpoints of inferior_ptid"));
1537 /* Set inferior_ptid; remove_breakpoint uses this global. */
1538 inferior_ptid
= pid_to_ptid (pid
);
1539 ALL_BP_LOCATIONS (b
)
1543 val
= remove_breakpoint (b
, mark_inserted
);
1546 do_cleanups (old_chain
);
1551 do_cleanups (old_chain
);
1556 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1560 if (b
->owner
->enable_state
== bp_permanent
)
1561 /* Permanent breakpoints cannot be inserted or removed. */
1564 /* The type of none suggests that owner is actually deleted.
1565 This should not ever happen. */
1566 gdb_assert (b
->owner
->type
!= bp_none
);
1568 if (b
->loc_type
== bp_loc_software_breakpoint
1569 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1571 /* "Normal" instruction breakpoint: either the standard
1572 trap-instruction bp (bp_breakpoint), or a
1573 bp_hardware_breakpoint. */
1575 /* First check to see if we have to handle an overlay. */
1576 if (overlay_debugging
== ovly_off
1577 || b
->section
== NULL
1578 || !(section_is_overlay (b
->section
)))
1580 /* No overlay handling: just remove the breakpoint. */
1582 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1583 val
= target_remove_hw_breakpoint (&b
->target_info
);
1585 val
= target_remove_breakpoint (&b
->target_info
);
1589 /* This breakpoint is in an overlay section.
1590 Did we set a breakpoint at the LMA? */
1591 if (!overlay_events_enabled
)
1593 /* Yes -- overlay event support is not active, so we
1594 should have set a breakpoint at the LMA. Remove it.
1596 /* Ignore any failures: if the LMA is in ROM, we will
1597 have already warned when we failed to insert it. */
1598 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1599 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1601 target_remove_breakpoint (&b
->overlay_target_info
);
1603 /* Did we set a breakpoint at the VMA?
1604 If so, we will have marked the breakpoint 'inserted'. */
1607 /* Yes -- remove it. Previously we did not bother to
1608 remove the breakpoint if the section had been
1609 unmapped, but let's not rely on that being safe. We
1610 don't know what the overlay manager might do. */
1611 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1612 val
= target_remove_hw_breakpoint (&b
->target_info
);
1614 /* However, we should remove *software* breakpoints only
1615 if the section is still mapped, or else we overwrite
1616 wrong code with the saved shadow contents. */
1617 else if (section_is_mapped (b
->section
))
1618 val
= target_remove_breakpoint (&b
->target_info
);
1624 /* No -- not inserted, so no need to remove. No error. */
1629 /* In some cases, we might not be able to remove a breakpoint
1630 in a shared library that has already been removed, but we
1631 have not yet processed the shlib unload event. */
1632 if (val
&& solib_address (b
->address
))
1637 b
->inserted
= (is
== mark_inserted
);
1639 else if (b
->loc_type
== bp_loc_hardware_watchpoint
)
1644 b
->inserted
= (is
== mark_inserted
);
1645 val
= target_remove_watchpoint (b
->address
, b
->length
,
1646 b
->watchpoint_type
);
1648 /* Failure to remove any of the hardware watchpoints comes here. */
1649 if ((is
== mark_uninserted
) && (b
->inserted
))
1650 warning (_("Could not remove hardware watchpoint %d."),
1653 else if (b
->owner
->type
== bp_catchpoint
1654 && breakpoint_enabled (b
->owner
)
1657 gdb_assert (b
->owner
->ops
!= NULL
&& b
->owner
->ops
->remove
!= NULL
);
1659 val
= b
->owner
->ops
->remove (b
->owner
);
1662 b
->inserted
= (is
== mark_inserted
);
1668 /* Clear the "inserted" flag in all breakpoints. */
1671 mark_breakpoints_out (void)
1673 struct bp_location
*bpt
;
1675 ALL_BP_LOCATIONS (bpt
)
1679 /* Clear the "inserted" flag in all breakpoints and delete any
1680 breakpoints which should go away between runs of the program.
1682 Plus other such housekeeping that has to be done for breakpoints
1685 Note: this function gets called at the end of a run (by
1686 generic_mourn_inferior) and when a run begins (by
1687 init_wait_for_inferior). */
1692 breakpoint_init_inferior (enum inf_context context
)
1694 struct breakpoint
*b
, *temp
;
1695 struct bp_location
*bpt
;
1698 /* If breakpoint locations are shared across processes, then there's
1700 if (gdbarch_has_global_solist (target_gdbarch
))
1703 ALL_BP_LOCATIONS (bpt
)
1704 if (bpt
->owner
->enable_state
!= bp_permanent
)
1707 ALL_BREAKPOINTS_SAFE (b
, temp
)
1712 case bp_watchpoint_scope
:
1714 /* If the call dummy breakpoint is at the entry point it will
1715 cause problems when the inferior is rerun, so we better
1718 Also get rid of scope breakpoints. */
1719 delete_breakpoint (b
);
1723 case bp_hardware_watchpoint
:
1724 case bp_read_watchpoint
:
1725 case bp_access_watchpoint
:
1727 /* Likewise for watchpoints on local expressions. */
1728 if (b
->exp_valid_block
!= NULL
)
1729 delete_breakpoint (b
);
1730 else if (context
== inf_starting
)
1732 /* Reset val field to force reread of starting value
1733 in insert_breakpoints. */
1735 value_free (b
->val
);
1745 /* Get rid of the moribund locations. */
1746 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, bpt
); ++ix
)
1747 free_bp_location (bpt
);
1748 VEC_free (bp_location_p
, moribund_locations
);
1751 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1752 exists at PC. It returns ordinary_breakpoint_here if it's an
1753 ordinary breakpoint, or permanent_breakpoint_here if it's a
1754 permanent breakpoint.
1755 - When continuing from a location with an ordinary breakpoint, we
1756 actually single step once before calling insert_breakpoints.
1757 - When continuing from a localion with a permanent breakpoint, we
1758 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1759 the target, to advance the PC past the breakpoint. */
1761 enum breakpoint_here
1762 breakpoint_here_p (CORE_ADDR pc
)
1764 const struct bp_location
*bpt
;
1765 int any_breakpoint_here
= 0;
1767 ALL_BP_LOCATIONS (bpt
)
1769 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1770 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1773 if ((breakpoint_enabled (bpt
->owner
)
1774 || bpt
->owner
->enable_state
== bp_permanent
)
1775 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1777 if (overlay_debugging
1778 && section_is_overlay (bpt
->section
)
1779 && !section_is_mapped (bpt
->section
))
1780 continue; /* unmapped overlay -- can't be a match */
1781 else if (bpt
->owner
->enable_state
== bp_permanent
)
1782 return permanent_breakpoint_here
;
1784 any_breakpoint_here
= 1;
1788 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1791 /* Return true if there's a moribund breakpoint at PC. */
1794 moribund_breakpoint_here_p (CORE_ADDR pc
)
1796 struct bp_location
*loc
;
1799 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
1800 if (loc
->address
== pc
)
1806 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1807 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1808 This does not check for single-step breakpoints, which are
1809 inserted and removed using direct target manipulation. */
1812 regular_breakpoint_inserted_here_p (CORE_ADDR pc
)
1814 const struct bp_location
*bpt
;
1816 ALL_BP_LOCATIONS (bpt
)
1818 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1819 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1823 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1825 if (overlay_debugging
1826 && section_is_overlay (bpt
->section
)
1827 && !section_is_mapped (bpt
->section
))
1828 continue; /* unmapped overlay -- can't be a match */
1836 /* Returns non-zero iff there's either regular breakpoint
1837 or a single step breakpoint inserted at PC. */
1840 breakpoint_inserted_here_p (CORE_ADDR pc
)
1842 if (regular_breakpoint_inserted_here_p (pc
))
1845 if (single_step_breakpoint_inserted_here_p (pc
))
1851 /* This function returns non-zero iff there is a software breakpoint
1855 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1857 const struct bp_location
*bpt
;
1858 int any_breakpoint_here
= 0;
1860 ALL_BP_LOCATIONS (bpt
)
1862 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1866 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1868 if (overlay_debugging
1869 && section_is_overlay (bpt
->section
)
1870 && !section_is_mapped (bpt
->section
))
1871 continue; /* unmapped overlay -- can't be a match */
1877 /* Also check for software single-step breakpoints. */
1878 if (single_step_breakpoint_inserted_here_p (pc
))
1884 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1885 PC is valid for process/thread PTID. */
1888 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1890 const struct bp_location
*bpt
;
1893 thread
= pid_to_thread_id (ptid
);
1895 ALL_BP_LOCATIONS (bpt
)
1897 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1898 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1901 if ((breakpoint_enabled (bpt
->owner
)
1902 || bpt
->owner
->enable_state
== bp_permanent
)
1903 && bpt
->address
== pc
1904 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1906 if (overlay_debugging
1907 && section_is_overlay (bpt
->section
)
1908 && !section_is_mapped (bpt
->section
))
1909 continue; /* unmapped overlay -- can't be a match */
1919 /* bpstat stuff. External routines' interfaces are documented
1923 ep_is_catchpoint (struct breakpoint
*ep
)
1925 return (ep
->type
== bp_catchpoint
);
1929 bpstat_free (bpstat bs
)
1931 if (bs
->old_val
!= NULL
)
1932 value_free (bs
->old_val
);
1933 free_command_lines (&bs
->commands
);
1937 /* Clear a bpstat so that it says we are not at any breakpoint.
1938 Also free any storage that is part of a bpstat. */
1941 bpstat_clear (bpstat
*bsp
)
1958 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1959 is part of the bpstat is copied as well. */
1962 bpstat_copy (bpstat bs
)
1966 bpstat retval
= NULL
;
1971 for (; bs
!= NULL
; bs
= bs
->next
)
1973 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1974 memcpy (tmp
, bs
, sizeof (*tmp
));
1975 if (bs
->commands
!= NULL
)
1976 tmp
->commands
= copy_command_lines (bs
->commands
);
1977 if (bs
->old_val
!= NULL
)
1979 tmp
->old_val
= value_copy (bs
->old_val
);
1980 release_value (tmp
->old_val
);
1984 /* This is the first thing in the chain. */
1994 /* Find the bpstat associated with this breakpoint */
1997 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
2002 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2004 if (bsp
->breakpoint_at
&& bsp
->breakpoint_at
->owner
== breakpoint
)
2010 /* Find a step_resume breakpoint associated with this bpstat.
2011 (If there are multiple step_resume bp's on the list, this function
2012 will arbitrarily pick one.)
2014 It is an error to use this function if BPSTAT doesn't contain a
2015 step_resume breakpoint.
2017 See wait_for_inferior's use of this function. */
2019 bpstat_find_step_resume_breakpoint (bpstat bsp
)
2023 gdb_assert (bsp
!= NULL
);
2025 current_thread
= pid_to_thread_id (inferior_ptid
);
2027 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2029 if ((bsp
->breakpoint_at
!= NULL
) &&
2030 (bsp
->breakpoint_at
->owner
->type
== bp_step_resume
) &&
2031 (bsp
->breakpoint_at
->owner
->thread
== current_thread
||
2032 bsp
->breakpoint_at
->owner
->thread
== -1))
2033 return bsp
->breakpoint_at
->owner
;
2036 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2040 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2041 at. *BSP upon return is a bpstat which points to the remaining
2042 breakpoints stopped at (but which is not guaranteed to be good for
2043 anything but further calls to bpstat_num).
2044 Return 0 if passed a bpstat which does not indicate any breakpoints.
2045 Return -1 if stopped at a breakpoint that has been deleted since
2047 Return 1 otherwise. */
2050 bpstat_num (bpstat
*bsp
, int *num
)
2052 struct breakpoint
*b
;
2055 return 0; /* No more breakpoint values */
2057 /* We assume we'll never have several bpstats that
2058 correspond to a single breakpoint -- otherwise,
2059 this function might return the same number more
2060 than once and this will look ugly. */
2061 b
= (*bsp
)->breakpoint_at
? (*bsp
)->breakpoint_at
->owner
: NULL
;
2062 *bsp
= (*bsp
)->next
;
2064 return -1; /* breakpoint that's been deleted since */
2066 *num
= b
->number
; /* We have its number */
2070 /* Modify BS so that the actions will not be performed. */
2073 bpstat_clear_actions (bpstat bs
)
2075 for (; bs
!= NULL
; bs
= bs
->next
)
2077 free_command_lines (&bs
->commands
);
2078 if (bs
->old_val
!= NULL
)
2080 value_free (bs
->old_val
);
2086 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2088 cleanup_executing_breakpoints (void *ignore
)
2090 executing_breakpoint_commands
= 0;
2093 /* Execute all the commands associated with all the breakpoints at this
2094 location. Any of these commands could cause the process to proceed
2095 beyond this point, etc. We look out for such changes by checking
2096 the global "breakpoint_proceeded" after each command.
2098 Returns true if a breakpoint command resumed the inferior. In that
2099 case, it is the caller's responsibility to recall it again with the
2100 bpstat of the current thread. */
2103 bpstat_do_actions_1 (bpstat
*bsp
)
2106 struct cleanup
*old_chain
;
2109 /* Avoid endless recursion if a `source' command is contained
2111 if (executing_breakpoint_commands
)
2114 executing_breakpoint_commands
= 1;
2115 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2117 /* This pointer will iterate over the list of bpstat's. */
2120 breakpoint_proceeded
= 0;
2121 for (; bs
!= NULL
; bs
= bs
->next
)
2123 struct command_line
*cmd
;
2124 struct cleanup
*this_cmd_tree_chain
;
2126 /* Take ownership of the BSP's command tree, if it has one.
2128 The command tree could legitimately contain commands like
2129 'step' and 'next', which call clear_proceed_status, which
2130 frees stop_bpstat's command tree. To make sure this doesn't
2131 free the tree we're executing out from under us, we need to
2132 take ownership of the tree ourselves. Since a given bpstat's
2133 commands are only executed once, we don't need to copy it; we
2134 can clear the pointer in the bpstat, and make sure we free
2135 the tree when we're done. */
2138 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2142 execute_control_command (cmd
);
2144 if (breakpoint_proceeded
)
2150 /* We can free this command tree now. */
2151 do_cleanups (this_cmd_tree_chain
);
2153 if (breakpoint_proceeded
)
2155 if (target_can_async_p ())
2156 /* If we are in async mode, then the target might be still
2157 running, not stopped at any breakpoint, so nothing for
2158 us to do here -- just return to the event loop. */
2161 /* In sync mode, when execute_control_command returns
2162 we're already standing on the next breakpoint.
2163 Breakpoint commands for that stop were not run, since
2164 execute_command does not run breakpoint commands --
2165 only command_line_handler does, but that one is not
2166 involved in execution of breakpoint commands. So, we
2167 can now execute breakpoint commands. It should be
2168 noted that making execute_command do bpstat actions is
2169 not an option -- in this case we'll have recursive
2170 invocation of bpstat for each breakpoint with a
2171 command, and can easily blow up GDB stack. Instead, we
2172 return true, which will trigger the caller to recall us
2173 with the new stop_bpstat. */
2178 do_cleanups (old_chain
);
2183 bpstat_do_actions (void)
2185 /* Do any commands attached to breakpoint we are stopped at. */
2186 while (!ptid_equal (inferior_ptid
, null_ptid
)
2187 && target_has_execution
2188 && !is_exited (inferior_ptid
)
2189 && !is_executing (inferior_ptid
))
2190 /* Since in sync mode, bpstat_do_actions may resume the inferior,
2191 and only return when it is stopped at the next breakpoint, we
2192 keep doing breakpoint actions until it returns false to
2193 indicate the inferior was not resumed. */
2194 if (!bpstat_do_actions_1 (&inferior_thread ()->stop_bpstat
))
2198 /* Print out the (old or new) value associated with a watchpoint. */
2201 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2204 fprintf_unfiltered (stream
, _("<unreadable>"));
2207 struct value_print_options opts
;
2208 get_user_print_options (&opts
);
2209 value_print (val
, stream
, &opts
);
2213 /* This is the normal print function for a bpstat. In the future,
2214 much of this logic could (should?) be moved to bpstat_stop_status,
2215 by having it set different print_it values.
2217 Current scheme: When we stop, bpstat_print() is called. It loops
2218 through the bpstat list of things causing this stop, calling the
2219 print_bp_stop_message function on each one. The behavior of the
2220 print_bp_stop_message function depends on the print_it field of
2221 bpstat. If such field so indicates, call this function here.
2223 Return values from this routine (ultimately used by bpstat_print()
2224 and normal_stop() to decide what to do):
2225 PRINT_NOTHING: Means we already printed all we needed to print,
2226 don't print anything else.
2227 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2228 that something to be followed by a location.
2229 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2230 that something to be followed by a location.
2231 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2234 static enum print_stop_action
2235 print_it_typical (bpstat bs
)
2237 struct cleanup
*old_chain
;
2238 struct breakpoint
*b
;
2239 const struct bp_location
*bl
;
2240 struct ui_stream
*stb
;
2242 enum print_stop_action result
;
2244 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2245 which has since been deleted. */
2246 if (bs
->breakpoint_at
== NULL
)
2247 return PRINT_UNKNOWN
;
2248 bl
= bs
->breakpoint_at
;
2251 stb
= ui_out_stream_new (uiout
);
2252 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2257 case bp_hardware_breakpoint
:
2258 bp_temp
= bs
->breakpoint_at
->owner
->disposition
== disp_del
;
2259 if (bl
->address
!= bl
->requested_address
)
2260 breakpoint_adjustment_warning (bl
->requested_address
,
2263 annotate_breakpoint (b
->number
);
2265 ui_out_text (uiout
, "\nTemporary breakpoint ");
2267 ui_out_text (uiout
, "\nBreakpoint ");
2268 if (ui_out_is_mi_like_p (uiout
))
2270 ui_out_field_string (uiout
, "reason",
2271 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2272 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
2274 ui_out_field_int (uiout
, "bkptno", b
->number
);
2275 ui_out_text (uiout
, ", ");
2276 result
= PRINT_SRC_AND_LOC
;
2279 case bp_shlib_event
:
2280 /* Did we stop because the user set the stop_on_solib_events
2281 variable? (If so, we report this as a generic, "Stopped due
2282 to shlib event" message.) */
2283 printf_filtered (_("Stopped due to shared library event\n"));
2284 result
= PRINT_NOTHING
;
2287 case bp_thread_event
:
2288 /* Not sure how we will get here.
2289 GDB should not stop for these breakpoints. */
2290 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2291 result
= PRINT_NOTHING
;
2294 case bp_overlay_event
:
2295 /* By analogy with the thread event, GDB should not stop for these. */
2296 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2297 result
= PRINT_NOTHING
;
2301 case bp_hardware_watchpoint
:
2302 annotate_watchpoint (b
->number
);
2303 if (ui_out_is_mi_like_p (uiout
))
2306 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2308 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2309 ui_out_text (uiout
, "\nOld value = ");
2310 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2311 ui_out_field_stream (uiout
, "old", stb
);
2312 ui_out_text (uiout
, "\nNew value = ");
2313 watchpoint_value_print (b
->val
, stb
->stream
);
2314 ui_out_field_stream (uiout
, "new", stb
);
2315 ui_out_text (uiout
, "\n");
2316 /* More than one watchpoint may have been triggered. */
2317 result
= PRINT_UNKNOWN
;
2320 case bp_read_watchpoint
:
2321 if (ui_out_is_mi_like_p (uiout
))
2324 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2326 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2327 ui_out_text (uiout
, "\nValue = ");
2328 watchpoint_value_print (b
->val
, stb
->stream
);
2329 ui_out_field_stream (uiout
, "value", stb
);
2330 ui_out_text (uiout
, "\n");
2331 result
= PRINT_UNKNOWN
;
2334 case bp_access_watchpoint
:
2335 if (bs
->old_val
!= NULL
)
2337 annotate_watchpoint (b
->number
);
2338 if (ui_out_is_mi_like_p (uiout
))
2341 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2343 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2344 ui_out_text (uiout
, "\nOld value = ");
2345 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2346 ui_out_field_stream (uiout
, "old", stb
);
2347 ui_out_text (uiout
, "\nNew value = ");
2352 if (ui_out_is_mi_like_p (uiout
))
2355 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2356 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2357 ui_out_text (uiout
, "\nValue = ");
2359 watchpoint_value_print (b
->val
, stb
->stream
);
2360 ui_out_field_stream (uiout
, "new", stb
);
2361 ui_out_text (uiout
, "\n");
2362 result
= PRINT_UNKNOWN
;
2365 /* Fall through, we don't deal with these types of breakpoints
2369 if (ui_out_is_mi_like_p (uiout
))
2372 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2373 result
= PRINT_UNKNOWN
;
2377 if (ui_out_is_mi_like_p (uiout
))
2380 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2381 result
= PRINT_UNKNOWN
;
2386 case bp_longjmp_resume
:
2387 case bp_step_resume
:
2388 case bp_watchpoint_scope
:
2391 result
= PRINT_UNKNOWN
;
2395 do_cleanups (old_chain
);
2399 /* Generic routine for printing messages indicating why we
2400 stopped. The behavior of this function depends on the value
2401 'print_it' in the bpstat structure. Under some circumstances we
2402 may decide not to print anything here and delegate the task to
2405 static enum print_stop_action
2406 print_bp_stop_message (bpstat bs
)
2408 switch (bs
->print_it
)
2411 /* Nothing should be printed for this bpstat entry. */
2412 return PRINT_UNKNOWN
;
2416 /* We still want to print the frame, but we already printed the
2417 relevant messages. */
2418 return PRINT_SRC_AND_LOC
;
2421 case print_it_normal
:
2423 const struct bp_location
*bl
= bs
->breakpoint_at
;
2424 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2426 /* Normal case. Call the breakpoint's print_it method, or
2427 print_it_typical. */
2428 /* FIXME: how breakpoint can ever be NULL here? */
2429 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2430 return b
->ops
->print_it (b
);
2432 return print_it_typical (bs
);
2437 internal_error (__FILE__
, __LINE__
,
2438 _("print_bp_stop_message: unrecognized enum value"));
2443 /* Print a message indicating what happened. This is called from
2444 normal_stop(). The input to this routine is the head of the bpstat
2445 list - a list of the eventpoints that caused this stop. This
2446 routine calls the generic print routine for printing a message
2447 about reasons for stopping. This will print (for example) the
2448 "Breakpoint n," part of the output. The return value of this
2451 PRINT_UNKNOWN: Means we printed nothing
2452 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2453 code to print the location. An example is
2454 "Breakpoint 1, " which should be followed by
2456 PRINT_SRC_ONLY: Means we printed something, but there is no need
2457 to also print the location part of the message.
2458 An example is the catch/throw messages, which
2459 don't require a location appended to the end.
2460 PRINT_NOTHING: We have done some printing and we don't need any
2461 further info to be printed.*/
2463 enum print_stop_action
2464 bpstat_print (bpstat bs
)
2468 /* Maybe another breakpoint in the chain caused us to stop.
2469 (Currently all watchpoints go on the bpstat whether hit or not.
2470 That probably could (should) be changed, provided care is taken
2471 with respect to bpstat_explains_signal). */
2472 for (; bs
; bs
= bs
->next
)
2474 val
= print_bp_stop_message (bs
);
2475 if (val
== PRINT_SRC_ONLY
2476 || val
== PRINT_SRC_AND_LOC
2477 || val
== PRINT_NOTHING
)
2481 /* We reached the end of the chain, or we got a null BS to start
2482 with and nothing was printed. */
2483 return PRINT_UNKNOWN
;
2486 /* Evaluate the expression EXP and return 1 if value is zero.
2487 This is used inside a catch_errors to evaluate the breakpoint condition.
2488 The argument is a "struct expression *" that has been cast to char * to
2489 make it pass through catch_errors. */
2492 breakpoint_cond_eval (void *exp
)
2494 struct value
*mark
= value_mark ();
2495 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2496 value_free_to_mark (mark
);
2500 /* Allocate a new bpstat and chain it to the current one. */
2503 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2507 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2509 bs
->breakpoint_at
= bl
;
2510 /* If the condition is false, etc., don't do the commands. */
2511 bs
->commands
= NULL
;
2513 bs
->print_it
= print_it_normal
;
2517 /* The target has stopped with waitstatus WS. Check if any hardware
2518 watchpoints have triggered, according to the target. */
2521 watchpoints_triggered (struct target_waitstatus
*ws
)
2523 int stopped_by_watchpoint
= STOPPED_BY_WATCHPOINT (*ws
);
2525 struct breakpoint
*b
;
2527 if (!stopped_by_watchpoint
)
2529 /* We were not stopped by a watchpoint. Mark all watchpoints
2530 as not triggered. */
2532 if (b
->type
== bp_hardware_watchpoint
2533 || b
->type
== bp_read_watchpoint
2534 || b
->type
== bp_access_watchpoint
)
2535 b
->watchpoint_triggered
= watch_triggered_no
;
2540 if (!target_stopped_data_address (¤t_target
, &addr
))
2542 /* We were stopped by a watchpoint, but we don't know where.
2543 Mark all watchpoints as unknown. */
2545 if (b
->type
== bp_hardware_watchpoint
2546 || b
->type
== bp_read_watchpoint
2547 || b
->type
== bp_access_watchpoint
)
2548 b
->watchpoint_triggered
= watch_triggered_unknown
;
2550 return stopped_by_watchpoint
;
2553 /* The target could report the data address. Mark watchpoints
2554 affected by this data address as triggered, and all others as not
2558 if (b
->type
== bp_hardware_watchpoint
2559 || b
->type
== bp_read_watchpoint
2560 || b
->type
== bp_access_watchpoint
)
2562 struct bp_location
*loc
;
2565 b
->watchpoint_triggered
= watch_triggered_no
;
2566 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2567 /* Exact match not required. Within range is
2569 if (target_watchpoint_addr_within_range (¤t_target
,
2573 b
->watchpoint_triggered
= watch_triggered_yes
;
2581 /* Possible return values for watchpoint_check (this can't be an enum
2582 because of check_errors). */
2583 /* The watchpoint has been deleted. */
2584 #define WP_DELETED 1
2585 /* The value has changed. */
2586 #define WP_VALUE_CHANGED 2
2587 /* The value has not changed. */
2588 #define WP_VALUE_NOT_CHANGED 3
2590 #define BP_TEMPFLAG 1
2591 #define BP_HARDWAREFLAG 2
2593 /* Check watchpoint condition. */
2596 watchpoint_check (void *p
)
2598 bpstat bs
= (bpstat
) p
;
2599 struct breakpoint
*b
;
2600 struct frame_info
*fr
;
2601 int within_current_scope
;
2603 b
= bs
->breakpoint_at
->owner
;
2605 if (b
->exp_valid_block
== NULL
)
2606 within_current_scope
= 1;
2609 /* There is no current frame at this moment. If we're going to have
2610 any chance of handling watchpoints on local variables, we'll need
2611 the frame chain (so we can determine if we're in scope). */
2612 reinit_frame_cache ();
2613 fr
= frame_find_by_id (b
->watchpoint_frame
);
2614 within_current_scope
= (fr
!= NULL
);
2616 /* If we've gotten confused in the unwinder, we might have
2617 returned a frame that can't describe this variable. */
2618 if (within_current_scope
2619 && (block_linkage_function (b
->exp_valid_block
)
2620 != get_frame_function (fr
)))
2621 within_current_scope
= 0;
2623 /* in_function_epilogue_p() returns a non-zero value if we're still
2624 in the function but the stack frame has already been invalidated.
2625 Since we can't rely on the values of local variables after the
2626 stack has been destroyed, we are treating the watchpoint in that
2627 state as `not changed' without further checking.
2629 vinschen/2003-09-04: The former implementation left out the case
2630 that the watchpoint frame couldn't be found by frame_find_by_id()
2631 because the current PC is currently in an epilogue. Calling
2632 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2633 if ((!within_current_scope
|| fr
== get_current_frame ())
2634 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2635 return WP_VALUE_NOT_CHANGED
;
2636 if (fr
&& within_current_scope
)
2637 /* If we end up stopping, the current frame will get selected
2638 in normal_stop. So this call to select_frame won't affect
2643 if (within_current_scope
)
2645 /* We use value_{,free_to_}mark because it could be a
2646 *long* time before we return to the command level and
2647 call free_all_values. We can't call free_all_values because
2648 we might be in the middle of evaluating a function call. */
2650 struct value
*mark
= value_mark ();
2651 struct value
*new_val
;
2653 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2654 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2655 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2657 if (new_val
!= NULL
)
2659 release_value (new_val
);
2660 value_free_to_mark (mark
);
2662 bs
->old_val
= b
->val
;
2665 /* We will stop here */
2666 return WP_VALUE_CHANGED
;
2670 /* Nothing changed, don't do anything. */
2671 value_free_to_mark (mark
);
2672 /* We won't stop here */
2673 return WP_VALUE_NOT_CHANGED
;
2678 /* This seems like the only logical thing to do because
2679 if we temporarily ignored the watchpoint, then when
2680 we reenter the block in which it is valid it contains
2681 garbage (in the case of a function, it may have two
2682 garbage values, one before and one after the prologue).
2683 So we can't even detect the first assignment to it and
2684 watch after that (since the garbage may or may not equal
2685 the first value assigned). */
2686 /* We print all the stop information in print_it_typical(), but
2687 in this case, by the time we call print_it_typical() this bp
2688 will be deleted already. So we have no choice but print the
2689 information here. */
2690 if (ui_out_is_mi_like_p (uiout
))
2692 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2693 ui_out_text (uiout
, "\nWatchpoint ");
2694 ui_out_field_int (uiout
, "wpnum", b
->number
);
2695 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2696 which its expression is valid.\n");
2698 if (b
->related_breakpoint
)
2699 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2700 b
->disposition
= disp_del_at_next_stop
;
2706 /* Return true if it looks like target has stopped due to hitting
2707 breakpoint location BL. This function does not check if we
2708 should stop, only if BL explains the stop. */
2710 bpstat_check_location (const struct bp_location
*bl
, CORE_ADDR bp_addr
)
2712 struct breakpoint
*b
= bl
->owner
;
2714 if (b
->type
!= bp_watchpoint
2715 && b
->type
!= bp_hardware_watchpoint
2716 && b
->type
!= bp_read_watchpoint
2717 && b
->type
!= bp_access_watchpoint
2718 && b
->type
!= bp_hardware_breakpoint
2719 && b
->type
!= bp_catchpoint
) /* a non-watchpoint bp */
2721 if (bl
->address
!= bp_addr
) /* address doesn't match */
2723 if (overlay_debugging
/* unmapped overlay section */
2724 && section_is_overlay (bl
->section
)
2725 && !section_is_mapped (bl
->section
))
2729 /* Continuable hardware watchpoints are treated as non-existent if the
2730 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2731 some data address). Otherwise gdb won't stop on a break instruction
2732 in the code (not from a breakpoint) when a hardware watchpoint has
2733 been defined. Also skip watchpoints which we know did not trigger
2734 (did not match the data address). */
2736 if ((b
->type
== bp_hardware_watchpoint
2737 || b
->type
== bp_read_watchpoint
2738 || b
->type
== bp_access_watchpoint
)
2739 && b
->watchpoint_triggered
== watch_triggered_no
)
2742 if (b
->type
== bp_hardware_breakpoint
)
2744 if (bl
->address
!= bp_addr
)
2746 if (overlay_debugging
/* unmapped overlay section */
2747 && section_is_overlay (bl
->section
)
2748 && !section_is_mapped (bl
->section
))
2752 if (b
->type
== bp_catchpoint
)
2754 gdb_assert (b
->ops
!= NULL
&& b
->ops
->breakpoint_hit
!= NULL
);
2755 if (!b
->ops
->breakpoint_hit (b
))
2762 /* If BS refers to a watchpoint, determine if the watched values
2763 has actually changed, and we should stop. If not, set BS->stop
2766 bpstat_check_watchpoint (bpstat bs
)
2768 const struct bp_location
*bl
= bs
->breakpoint_at
;
2769 struct breakpoint
*b
= bl
->owner
;
2771 if (b
->type
== bp_watchpoint
2772 || b
->type
== bp_read_watchpoint
2773 || b
->type
== bp_access_watchpoint
2774 || b
->type
== bp_hardware_watchpoint
)
2778 int must_check_value
= 0;
2780 if (b
->type
== bp_watchpoint
)
2781 /* For a software watchpoint, we must always check the
2783 must_check_value
= 1;
2784 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2785 /* We have a hardware watchpoint (read, write, or access)
2786 and the target earlier reported an address watched by
2788 must_check_value
= 1;
2789 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2790 && b
->type
== bp_hardware_watchpoint
)
2791 /* We were stopped by a hardware watchpoint, but the target could
2792 not report the data address. We must check the watchpoint's
2793 value. Access and read watchpoints are out of luck; without
2794 a data address, we can't figure it out. */
2795 must_check_value
= 1;
2797 if (must_check_value
)
2799 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2801 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2802 int e
= catch_errors (watchpoint_check
, bs
, message
,
2804 do_cleanups (cleanups
);
2808 /* We've already printed what needs to be printed. */
2809 bs
->print_it
= print_it_done
;
2812 case WP_VALUE_CHANGED
:
2813 if (b
->type
== bp_read_watchpoint
)
2815 /* Don't stop: read watchpoints shouldn't fire if
2816 the value has changed. This is for targets
2817 which cannot set read-only watchpoints. */
2818 bs
->print_it
= print_it_noop
;
2822 case WP_VALUE_NOT_CHANGED
:
2823 if (b
->type
== bp_hardware_watchpoint
2824 || b
->type
== bp_watchpoint
)
2826 /* Don't stop: write watchpoints shouldn't fire if
2827 the value hasn't changed. */
2828 bs
->print_it
= print_it_noop
;
2836 /* Error from catch_errors. */
2837 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2838 if (b
->related_breakpoint
)
2839 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2840 b
->disposition
= disp_del_at_next_stop
;
2841 /* We've already printed what needs to be printed. */
2842 bs
->print_it
= print_it_done
;
2846 else /* must_check_value == 0 */
2848 /* This is a case where some watchpoint(s) triggered, but
2849 not at the address of this watchpoint, or else no
2850 watchpoint triggered after all. So don't print
2851 anything for this watchpoint. */
2852 bs
->print_it
= print_it_noop
;
2859 /* Check conditions (condition proper, frame, thread and ignore count)
2860 of breakpoint referred to by BS. If we should not stop for this
2861 breakpoint, set BS->stop to 0. */
2863 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
2865 int thread_id
= pid_to_thread_id (ptid
);
2866 const struct bp_location
*bl
= bs
->breakpoint_at
;
2867 struct breakpoint
*b
= bl
->owner
;
2869 if (frame_id_p (b
->frame_id
)
2870 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2874 int value_is_zero
= 0;
2876 /* If this is a scope breakpoint, mark the associated
2877 watchpoint as triggered so that we will handle the
2878 out-of-scope event. We'll get to the watchpoint next
2880 if (b
->type
== bp_watchpoint_scope
)
2881 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
2883 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
2885 /* Need to select the frame, with all that implies
2886 so that the conditions will have the right context. */
2887 select_frame (get_current_frame ());
2889 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
2890 "Error in testing breakpoint condition:\n",
2892 /* FIXME-someday, should give breakpoint # */
2895 if (bl
->cond
&& value_is_zero
)
2899 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2903 else if (b
->ignore_count
> 0)
2906 annotate_ignore_count_change ();
2908 /* Increase the hit count even though we don't
2916 /* Get a bpstat associated with having just stopped at address
2917 BP_ADDR in thread PTID.
2919 Determine whether we stopped at a breakpoint, etc, or whether we
2920 don't understand this stop. Result is a chain of bpstat's such that:
2922 if we don't understand the stop, the result is a null pointer.
2924 if we understand why we stopped, the result is not null.
2926 Each element of the chain refers to a particular breakpoint or
2927 watchpoint at which we have stopped. (We may have stopped for
2928 several reasons concurrently.)
2930 Each element of the chain has valid next, breakpoint_at,
2931 commands, FIXME??? fields. */
2934 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
2936 struct breakpoint
*b
= NULL
;
2937 const struct bp_location
*bl
;
2938 struct bp_location
*loc
;
2939 /* Root of the chain of bpstat's */
2940 struct bpstats root_bs
[1];
2941 /* Pointer to the last thing in the chain currently. */
2942 bpstat bs
= root_bs
;
2944 int need_remove_insert
;
2946 ALL_BP_LOCATIONS (bl
)
2950 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2953 /* For hardware watchpoints, we look only at the first location.
2954 The watchpoint_check function will work on entire expression,
2955 not the individual locations. For read watchopints, the
2956 watchpoints_triggered function have checked all locations
2959 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
2962 if (!bpstat_check_location (bl
, bp_addr
))
2965 /* Come here if it's a watchpoint, or if the break address matches */
2967 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
2969 /* Assume we stop. Should we find watchpoint that is not actually
2970 triggered, or if condition of breakpoint is false, we'll reset
2975 bpstat_check_watchpoint (bs
);
2979 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
2980 /* We do not stop for these. */
2983 bpstat_check_breakpoint_conditions (bs
, ptid
);
2989 /* We will stop here */
2990 if (b
->disposition
== disp_disable
)
2992 if (b
->enable_state
!= bp_permanent
)
2993 b
->enable_state
= bp_disabled
;
2994 update_global_location_list (0);
2998 bs
->commands
= b
->commands
;
3000 (strcmp ("silent", bs
->commands
->line
) == 0
3001 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3003 bs
->commands
= bs
->commands
->next
;
3006 bs
->commands
= copy_command_lines (bs
->commands
);
3009 /* Print nothing for this entry if we dont stop or if we dont print. */
3010 if (bs
->stop
== 0 || bs
->print
== 0)
3011 bs
->print_it
= print_it_noop
;
3014 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
3016 if (loc
->address
== bp_addr
)
3018 bs
= bpstat_alloc (loc
, bs
);
3019 /* For hits of moribund locations, we should just proceed. */
3022 bs
->print_it
= print_it_noop
;
3026 bs
->next
= NULL
; /* Terminate the chain */
3027 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3029 /* If we aren't stopping, the value of some hardware watchpoint may
3030 not have changed, but the intermediate memory locations we are
3031 watching may have. Don't bother if we're stopping; this will get
3033 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3037 need_remove_insert
= 0;
3039 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3041 && bs
->breakpoint_at
->owner
3042 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3043 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3044 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3046 /* remove/insert can invalidate bs->breakpoint_at, if this
3047 location is no longer used by the watchpoint. Prevent
3048 further code from trying to use it. */
3049 bs
->breakpoint_at
= NULL
;
3050 need_remove_insert
= 1;
3053 if (need_remove_insert
)
3055 remove_breakpoints ();
3056 insert_breakpoints ();
3059 return root_bs
->next
;
3062 /* Tell what to do about this bpstat. */
3064 bpstat_what (bpstat bs
)
3066 /* Classify each bpstat as one of the following. */
3069 /* This bpstat element has no effect on the main_action. */
3072 /* There was a watchpoint, stop but don't print. */
3075 /* There was a watchpoint, stop and print. */
3078 /* There was a breakpoint but we're not stopping. */
3081 /* There was a breakpoint, stop but don't print. */
3084 /* There was a breakpoint, stop and print. */
3087 /* We hit the longjmp breakpoint. */
3090 /* We hit the longjmp_resume breakpoint. */
3093 /* We hit the step_resume breakpoint. */
3096 /* We hit the shared library event breakpoint. */
3099 /* This is just used to count how many enums there are. */
3103 /* Here is the table which drives this routine. So that we can
3104 format it pretty, we define some abbreviations for the
3105 enum bpstat_what codes. */
3106 #define kc BPSTAT_WHAT_KEEP_CHECKING
3107 #define ss BPSTAT_WHAT_STOP_SILENT
3108 #define sn BPSTAT_WHAT_STOP_NOISY
3109 #define sgl BPSTAT_WHAT_SINGLE
3110 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3111 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3112 #define sr BPSTAT_WHAT_STEP_RESUME
3113 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3115 /* "Can't happen." Might want to print an error message.
3116 abort() is not out of the question, but chances are GDB is just
3117 a bit confused, not unusable. */
3118 #define err BPSTAT_WHAT_STOP_NOISY
3120 /* Given an old action and a class, come up with a new action. */
3121 /* One interesting property of this table is that wp_silent is the same
3122 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3123 after stopping, the check for whether to step over a breakpoint
3124 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3125 reference to how we stopped. We retain separate wp_silent and
3126 bp_silent codes in case we want to change that someday.
3128 Another possibly interesting property of this table is that
3129 there's a partial ordering, priority-like, of the actions. Once
3130 you've decided that some action is appropriate, you'll never go
3131 back and decide something of a lower priority is better. The
3134 kc < clr sgl shl slr sn sr ss
3135 sgl < shl slr sn sr ss
3136 slr < err shl sn sr ss
3137 clr < err shl sn sr ss
3143 What I think this means is that we don't need a damned table
3144 here. If you just put the rows and columns in the right order,
3145 it'd look awfully regular. We could simply walk the bpstat list
3146 and choose the highest priority action we find, with a little
3147 logic to handle the 'err' cases. */
3149 /* step_resume entries: a step resume breakpoint overrides another
3150 breakpoint of signal handling (see comment in wait_for_inferior
3151 at where we set the step_resume breakpoint). */
3153 static const enum bpstat_what_main_action
3154 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3157 /* kc ss sn sgl slr clr sr shl
3160 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
},
3162 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3164 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3166 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
},
3168 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3170 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3172 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
},
3174 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
},
3176 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3178 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
}
3191 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3192 struct bpstat_what retval
;
3194 retval
.call_dummy
= 0;
3195 for (; bs
!= NULL
; bs
= bs
->next
)
3197 enum class bs_class
= no_effect
;
3198 if (bs
->breakpoint_at
== NULL
)
3199 /* I suspect this can happen if it was a momentary breakpoint
3200 which has since been deleted. */
3202 if (bs
->breakpoint_at
->owner
== NULL
)
3203 bs_class
= bp_nostop
;
3205 switch (bs
->breakpoint_at
->owner
->type
)
3211 case bp_hardware_breakpoint
:
3217 bs_class
= bp_noisy
;
3219 bs_class
= bp_silent
;
3222 bs_class
= bp_nostop
;
3225 case bp_hardware_watchpoint
:
3226 case bp_read_watchpoint
:
3227 case bp_access_watchpoint
:
3231 bs_class
= wp_noisy
;
3233 bs_class
= wp_silent
;
3236 /* There was a watchpoint, but we're not stopping.
3237 This requires no further action. */
3238 bs_class
= no_effect
;
3241 bs_class
= long_jump
;
3243 case bp_longjmp_resume
:
3244 bs_class
= long_resume
;
3246 case bp_step_resume
:
3249 bs_class
= step_resume
;
3252 /* It is for the wrong frame. */
3253 bs_class
= bp_nostop
;
3255 case bp_watchpoint_scope
:
3256 bs_class
= bp_nostop
;
3258 case bp_shlib_event
:
3259 bs_class
= shlib_event
;
3261 case bp_thread_event
:
3262 case bp_overlay_event
:
3263 bs_class
= bp_nostop
;
3269 bs_class
= bp_noisy
;
3271 bs_class
= bp_silent
;
3274 /* There was a catchpoint, but we're not stopping.
3275 This requires no further action. */
3276 bs_class
= no_effect
;
3279 /* Make sure the action is stop (silent or noisy),
3280 so infrun.c pops the dummy frame. */
3281 bs_class
= bp_silent
;
3282 retval
.call_dummy
= 1;
3285 current_action
= table
[(int) bs_class
][(int) current_action
];
3287 retval
.main_action
= current_action
;
3291 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3292 without hardware support). This isn't related to a specific bpstat,
3293 just to things like whether watchpoints are set. */
3296 bpstat_should_step (void)
3298 struct breakpoint
*b
;
3300 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3307 static void print_breakpoint_location (struct breakpoint
*b
,
3308 struct bp_location
*loc
,
3310 struct ui_stream
*stb
)
3315 = find_pc_sect_function (loc
->address
, loc
->section
);
3318 ui_out_text (uiout
, "in ");
3319 ui_out_field_string (uiout
, "func",
3320 SYMBOL_PRINT_NAME (sym
));
3321 ui_out_wrap_hint (uiout
, wrap_indent
);
3322 ui_out_text (uiout
, " at ");
3324 ui_out_field_string (uiout
, "file", b
->source_file
);
3325 ui_out_text (uiout
, ":");
3327 if (ui_out_is_mi_like_p (uiout
))
3329 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3330 char *fullname
= symtab_to_fullname (sal
.symtab
);
3333 ui_out_field_string (uiout
, "fullname", fullname
);
3336 ui_out_field_int (uiout
, "line", b
->line_number
);
3340 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3344 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3345 ui_out_field_stream (uiout
, "at", stb
);
3349 /* Print B to gdb_stdout. */
3351 print_one_breakpoint_location (struct breakpoint
*b
,
3352 struct bp_location
*loc
,
3354 CORE_ADDR
*last_addr
)
3356 struct command_line
*l
;
3358 struct ep_type_description
3363 static struct ep_type_description bptypes
[] =
3365 {bp_none
, "?deleted?"},
3366 {bp_breakpoint
, "breakpoint"},
3367 {bp_hardware_breakpoint
, "hw breakpoint"},
3368 {bp_until
, "until"},
3369 {bp_finish
, "finish"},
3370 {bp_watchpoint
, "watchpoint"},
3371 {bp_hardware_watchpoint
, "hw watchpoint"},
3372 {bp_read_watchpoint
, "read watchpoint"},
3373 {bp_access_watchpoint
, "acc watchpoint"},
3374 {bp_longjmp
, "longjmp"},
3375 {bp_longjmp_resume
, "longjmp resume"},
3376 {bp_step_resume
, "step resume"},
3377 {bp_watchpoint_scope
, "watchpoint scope"},
3378 {bp_call_dummy
, "call dummy"},
3379 {bp_shlib_event
, "shlib events"},
3380 {bp_thread_event
, "thread events"},
3381 {bp_overlay_event
, "overlay events"},
3382 {bp_catchpoint
, "catchpoint"},
3385 static char bpenables
[] = "nynny";
3386 char wrap_indent
[80];
3387 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3388 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3389 struct cleanup
*bkpt_chain
;
3391 int header_of_multiple
= 0;
3392 int part_of_multiple
= (loc
!= NULL
);
3393 struct value_print_options opts
;
3395 get_user_print_options (&opts
);
3397 gdb_assert (!loc
|| loc_number
!= 0);
3398 /* See comment in print_one_breakpoint concerning
3399 treatment of breakpoints with single disabled
3403 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3404 header_of_multiple
= 1;
3409 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3413 if (part_of_multiple
)
3416 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3417 ui_out_field_string (uiout
, "number", formatted
);
3422 ui_out_field_int (uiout
, "number", b
->number
);
3427 if (part_of_multiple
)
3428 ui_out_field_skip (uiout
, "type");
3431 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3432 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3433 internal_error (__FILE__
, __LINE__
,
3434 _("bptypes table does not describe type #%d."),
3436 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3441 if (part_of_multiple
)
3442 ui_out_field_skip (uiout
, "disp");
3444 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3449 if (part_of_multiple
)
3450 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3452 ui_out_field_fmt (uiout
, "enabled", "%c",
3453 bpenables
[(int) b
->enable_state
]);
3454 ui_out_spaces (uiout
, 2);
3458 strcpy (wrap_indent
, " ");
3459 if (opts
.addressprint
)
3461 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3462 strcat (wrap_indent
, " ");
3464 strcat (wrap_indent
, " ");
3467 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3469 /* Although the print_one can possibly print
3470 all locations, calling it here is not likely
3471 to get any nice result. So, make sure there's
3472 just one location. */
3473 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3474 b
->ops
->print_one (b
, last_addr
);
3480 internal_error (__FILE__
, __LINE__
,
3481 _("print_one_breakpoint: bp_none encountered\n"));
3485 case bp_hardware_watchpoint
:
3486 case bp_read_watchpoint
:
3487 case bp_access_watchpoint
:
3488 /* Field 4, the address, is omitted (which makes the columns
3489 not line up too nicely with the headers, but the effect
3490 is relatively readable). */
3491 if (opts
.addressprint
)
3492 ui_out_field_skip (uiout
, "addr");
3494 print_expression (b
->exp
, stb
->stream
);
3495 ui_out_field_stream (uiout
, "what", stb
);
3499 case bp_hardware_breakpoint
:
3503 case bp_longjmp_resume
:
3504 case bp_step_resume
:
3505 case bp_watchpoint_scope
:
3507 case bp_shlib_event
:
3508 case bp_thread_event
:
3509 case bp_overlay_event
:
3510 if (opts
.addressprint
)
3513 if (header_of_multiple
)
3514 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3515 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3516 ui_out_field_string (uiout
, "addr", "<PENDING>");
3518 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3521 if (!header_of_multiple
)
3522 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3524 *last_addr
= b
->loc
->address
;
3528 if (!part_of_multiple
&& b
->thread
!= -1)
3530 /* FIXME: This seems to be redundant and lost here; see the
3531 "stop only in" line a little further down. */
3532 ui_out_text (uiout
, " thread ");
3533 ui_out_field_int (uiout
, "thread", b
->thread
);
3536 ui_out_text (uiout
, "\n");
3538 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3541 ui_out_text (uiout
, "\tstop only in stack frame at ");
3542 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3544 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3545 ui_out_text (uiout
, "\n");
3548 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3550 /* We do not print the condition for Ada exception catchpoints
3551 because the condition is an internal implementation detail
3552 that we do not want to expose to the user. */
3554 ui_out_text (uiout
, "\tstop only if ");
3555 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3556 ui_out_text (uiout
, "\n");
3559 if (!part_of_multiple
&& b
->thread
!= -1)
3561 /* FIXME should make an annotation for this */
3562 ui_out_text (uiout
, "\tstop only in thread ");
3563 ui_out_field_int (uiout
, "thread", b
->thread
);
3564 ui_out_text (uiout
, "\n");
3567 if (!part_of_multiple
&& b
->hit_count
)
3569 /* FIXME should make an annotation for this */
3570 if (ep_is_catchpoint (b
))
3571 ui_out_text (uiout
, "\tcatchpoint");
3573 ui_out_text (uiout
, "\tbreakpoint");
3574 ui_out_text (uiout
, " already hit ");
3575 ui_out_field_int (uiout
, "times", b
->hit_count
);
3576 if (b
->hit_count
== 1)
3577 ui_out_text (uiout
, " time\n");
3579 ui_out_text (uiout
, " times\n");
3582 /* Output the count also if it is zero, but only if this is
3583 mi. FIXME: Should have a better test for this. */
3584 if (ui_out_is_mi_like_p (uiout
))
3585 if (!part_of_multiple
&& b
->hit_count
== 0)
3586 ui_out_field_int (uiout
, "times", b
->hit_count
);
3588 if (!part_of_multiple
&& b
->ignore_count
)
3591 ui_out_text (uiout
, "\tignore next ");
3592 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3593 ui_out_text (uiout
, " hits\n");
3596 if (!part_of_multiple
&& (l
= b
->commands
))
3598 struct cleanup
*script_chain
;
3601 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3602 print_command_lines (uiout
, l
, 4);
3603 do_cleanups (script_chain
);
3606 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3609 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3610 else if (b
->exp_string
)
3611 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3614 do_cleanups (bkpt_chain
);
3615 do_cleanups (old_chain
);
3619 print_one_breakpoint (struct breakpoint
*b
,
3620 CORE_ADDR
*last_addr
)
3622 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3624 /* If this breakpoint has custom print function,
3625 it's already printed. Otherwise, print individual
3626 locations, if any. */
3627 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3629 /* If breakpoint has a single location that is
3630 disabled, we print it as if it had
3631 several locations, since otherwise it's hard to
3632 represent "breakpoint enabled, location disabled"
3634 Note that while hardware watchpoints have
3635 several locations internally, that's no a property
3638 && !is_hardware_watchpoint (b
)
3639 && (b
->loc
->next
|| !b
->loc
->enabled
)
3640 && !ui_out_is_mi_like_p (uiout
))
3642 struct bp_location
*loc
;
3644 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3645 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3651 struct captured_breakpoint_query_args
3657 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3659 struct captured_breakpoint_query_args
*args
= data
;
3660 struct breakpoint
*b
;
3661 CORE_ADDR dummy_addr
= 0;
3664 if (args
->bnum
== b
->number
)
3666 print_one_breakpoint (b
, &dummy_addr
);
3674 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3676 struct captured_breakpoint_query_args args
;
3678 /* For the moment we don't trust print_one_breakpoint() to not throw
3680 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3681 error_message
, RETURN_MASK_ALL
) < 0)
3687 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3688 catchpoints, et.al.). */
3691 user_settable_breakpoint (const struct breakpoint
*b
)
3693 return (b
->type
== bp_breakpoint
3694 || b
->type
== bp_catchpoint
3695 || b
->type
== bp_hardware_breakpoint
3696 || b
->type
== bp_watchpoint
3697 || b
->type
== bp_read_watchpoint
3698 || b
->type
== bp_access_watchpoint
3699 || b
->type
== bp_hardware_watchpoint
);
3702 /* Print information on user settable breakpoint (watchpoint, etc)
3703 number BNUM. If BNUM is -1 print all user settable breakpoints.
3704 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3707 breakpoint_1 (int bnum
, int allflag
)
3709 struct breakpoint
*b
;
3710 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3711 int nr_printable_breakpoints
;
3712 struct cleanup
*bkpttbl_chain
;
3713 struct value_print_options opts
;
3715 get_user_print_options (&opts
);
3717 /* Compute the number of rows in the table. */
3718 nr_printable_breakpoints
= 0;
3721 || bnum
== b
->number
)
3723 if (allflag
|| user_settable_breakpoint (b
))
3724 nr_printable_breakpoints
++;
3727 if (opts
.addressprint
)
3729 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3733 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3736 if (nr_printable_breakpoints
> 0)
3737 annotate_breakpoints_headers ();
3738 if (nr_printable_breakpoints
> 0)
3740 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3741 if (nr_printable_breakpoints
> 0)
3743 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3744 if (nr_printable_breakpoints
> 0)
3746 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3747 if (nr_printable_breakpoints
> 0)
3749 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3750 if (opts
.addressprint
)
3752 if (nr_printable_breakpoints
> 0)
3754 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3755 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3757 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3759 if (nr_printable_breakpoints
> 0)
3761 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3762 ui_out_table_body (uiout
);
3763 if (nr_printable_breakpoints
> 0)
3764 annotate_breakpoints_table ();
3768 || bnum
== b
->number
)
3770 /* We only print out user settable breakpoints unless the
3772 if (allflag
|| user_settable_breakpoint (b
))
3773 print_one_breakpoint (b
, &last_addr
);
3776 do_cleanups (bkpttbl_chain
);
3778 if (nr_printable_breakpoints
== 0)
3781 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3783 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3788 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3789 that a comparison of an unsigned with -1 is always false. */
3790 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3791 set_next_address (current_gdbarch
, last_addr
);
3794 /* FIXME? Should this be moved up so that it is only called when
3795 there have been breakpoints? */
3796 annotate_breakpoints_table_end ();
3800 breakpoints_info (char *bnum_exp
, int from_tty
)
3805 bnum
= parse_and_eval_long (bnum_exp
);
3807 breakpoint_1 (bnum
, 0);
3811 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3816 bnum
= parse_and_eval_long (bnum_exp
);
3818 breakpoint_1 (bnum
, 1);
3822 breakpoint_has_pc (struct breakpoint
*b
,
3823 CORE_ADDR pc
, struct obj_section
*section
)
3825 struct bp_location
*bl
= b
->loc
;
3826 for (; bl
; bl
= bl
->next
)
3828 if (bl
->address
== pc
3829 && (!overlay_debugging
|| bl
->section
== section
))
3835 /* Print a message describing any breakpoints set at PC. */
3838 describe_other_breakpoints (CORE_ADDR pc
, struct obj_section
*section
,
3842 struct breakpoint
*b
;
3845 others
+= breakpoint_has_pc (b
, pc
, section
);
3849 printf_filtered (_("Note: breakpoint "));
3850 else /* if (others == ???) */
3851 printf_filtered (_("Note: breakpoints "));
3853 if (breakpoint_has_pc (b
, pc
, section
))
3856 printf_filtered ("%d", b
->number
);
3857 if (b
->thread
== -1 && thread
!= -1)
3858 printf_filtered (" (all threads)");
3859 else if (b
->thread
!= -1)
3860 printf_filtered (" (thread %d)", b
->thread
);
3861 printf_filtered ("%s%s ",
3862 ((b
->enable_state
== bp_disabled
||
3863 b
->enable_state
== bp_call_disabled
)
3865 : b
->enable_state
== bp_permanent
3869 : ((others
== 1) ? " and" : ""));
3871 printf_filtered (_("also set at pc "));
3872 fputs_filtered (paddress (pc
), gdb_stdout
);
3873 printf_filtered (".\n");
3877 /* Set the default place to put a breakpoint
3878 for the `break' command with no arguments. */
3881 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3884 default_breakpoint_valid
= valid
;
3885 default_breakpoint_address
= addr
;
3886 default_breakpoint_symtab
= symtab
;
3887 default_breakpoint_line
= line
;
3890 /* Return true iff it is meaningful to use the address member of
3891 BPT. For some breakpoint types, the address member is irrelevant
3892 and it makes no sense to attempt to compare it to other addresses
3893 (or use it for any other purpose either).
3895 More specifically, each of the following breakpoint types will always
3896 have a zero valued address and we don't want check_duplicates() to mark
3897 breakpoints of any of these types to be a duplicate of an actual
3898 breakpoint at address zero:
3901 bp_hardware_watchpoint
3903 bp_access_watchpoint
3907 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3909 enum bptype type
= bpt
->type
;
3911 return (type
!= bp_watchpoint
3912 && type
!= bp_hardware_watchpoint
3913 && type
!= bp_read_watchpoint
3914 && type
!= bp_access_watchpoint
3915 && type
!= bp_catchpoint
);
3918 /* Rescan breakpoints at the same address and section as BPT,
3919 marking the first one as "first" and any others as "duplicates".
3920 This is so that the bpt instruction is only inserted once.
3921 If we have a permanent breakpoint at the same place as BPT, make
3922 that one the official one, and the rest as duplicates. */
3925 check_duplicates_for (CORE_ADDR address
, struct obj_section
*section
)
3927 struct bp_location
*b
;
3929 struct bp_location
*perm_bp
= 0;
3931 ALL_BP_LOCATIONS (b
)
3932 if (b
->owner
->enable_state
!= bp_disabled
3933 && b
->owner
->enable_state
!= bp_call_disabled
3935 && !b
->shlib_disabled
3936 && b
->address
== address
/* address / overlay match */
3937 && (!overlay_debugging
|| b
->section
== section
)
3938 && breakpoint_address_is_meaningful (b
->owner
))
3940 /* Have we found a permanent breakpoint? */
3941 if (b
->owner
->enable_state
== bp_permanent
)
3948 b
->duplicate
= count
> 1;
3951 /* If we found a permanent breakpoint at this address, go over the
3952 list again and declare all the other breakpoints there to be the
3956 perm_bp
->duplicate
= 0;
3958 /* Permanent breakpoint should always be inserted. */
3959 if (! perm_bp
->inserted
)
3960 internal_error (__FILE__
, __LINE__
,
3961 _("allegedly permanent breakpoint is not "
3962 "actually inserted"));
3964 ALL_BP_LOCATIONS (b
)
3967 if (b
->owner
->enable_state
!= bp_disabled
3968 && b
->owner
->enable_state
!= bp_call_disabled
3969 && b
->enabled
&& !b
->shlib_disabled
3970 && b
->address
== address
/* address / overlay match */
3971 && (!overlay_debugging
|| b
->section
== section
)
3972 && breakpoint_address_is_meaningful (b
->owner
))
3975 internal_error (__FILE__
, __LINE__
,
3976 _("another breakpoint was inserted on top of "
3977 "a permanent breakpoint"));
3986 check_duplicates (struct breakpoint
*bpt
)
3988 struct bp_location
*bl
= bpt
->loc
;
3990 if (! breakpoint_address_is_meaningful (bpt
))
3993 for (; bl
; bl
= bl
->next
)
3994 check_duplicates_for (bl
->address
, bl
->section
);
3998 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3999 int bnum
, int have_bnum
)
4004 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4005 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4007 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4008 bnum
, astr1
, astr2
);
4010 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4013 /* Adjust a breakpoint's address to account for architectural constraints
4014 on breakpoint placement. Return the adjusted address. Note: Very
4015 few targets require this kind of adjustment. For most targets,
4016 this function is simply the identity function. */
4019 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4021 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4023 /* Very few targets need any kind of breakpoint adjustment. */
4026 else if (bptype
== bp_watchpoint
4027 || bptype
== bp_hardware_watchpoint
4028 || bptype
== bp_read_watchpoint
4029 || bptype
== bp_access_watchpoint
4030 || bptype
== bp_catchpoint
)
4032 /* Watchpoints and the various bp_catch_* eventpoints should not
4033 have their addresses modified. */
4038 CORE_ADDR adjusted_bpaddr
;
4040 /* Some targets have architectural constraints on the placement
4041 of breakpoint instructions. Obtain the adjusted address. */
4042 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4045 /* An adjusted breakpoint address can significantly alter
4046 a user's expectations. Print a warning if an adjustment
4048 if (adjusted_bpaddr
!= bpaddr
)
4049 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4051 return adjusted_bpaddr
;
4055 /* Allocate a struct bp_location. */
4057 static struct bp_location
*
4058 allocate_bp_location (struct breakpoint
*bpt
)
4060 struct bp_location
*loc
, *loc_p
;
4062 loc
= xmalloc (sizeof (struct bp_location
));
4063 memset (loc
, 0, sizeof (*loc
));
4067 loc
->shlib_disabled
= 0;
4076 case bp_longjmp_resume
:
4077 case bp_step_resume
:
4078 case bp_watchpoint_scope
:
4080 case bp_shlib_event
:
4081 case bp_thread_event
:
4082 case bp_overlay_event
:
4083 loc
->loc_type
= bp_loc_software_breakpoint
;
4085 case bp_hardware_breakpoint
:
4086 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4088 case bp_hardware_watchpoint
:
4089 case bp_read_watchpoint
:
4090 case bp_access_watchpoint
:
4091 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4095 loc
->loc_type
= bp_loc_other
;
4098 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4104 static void free_bp_location (struct bp_location
*loc
)
4109 if (loc
->function_name
)
4110 xfree (loc
->function_name
);
4115 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4116 that has type BPTYPE and has no locations as yet. */
4118 static struct breakpoint
*
4119 set_raw_breakpoint_without_location (enum bptype bptype
)
4121 struct breakpoint
*b
, *b1
;
4123 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4124 memset (b
, 0, sizeof (*b
));
4127 b
->language
= current_language
->la_language
;
4128 b
->input_radix
= input_radix
;
4130 b
->enable_state
= bp_enabled
;
4133 b
->ignore_count
= 0;
4135 b
->frame_id
= null_frame_id
;
4136 b
->forked_inferior_pid
= null_ptid
;
4137 b
->exec_pathname
= NULL
;
4139 b
->condition_not_parsed
= 0;
4141 /* Add this breakpoint to the end of the chain
4142 so that a list of breakpoints will come out in order
4143 of increasing numbers. */
4145 b1
= breakpoint_chain
;
4147 breakpoint_chain
= b
;
4157 /* Initialize loc->function_name. */
4159 set_breakpoint_location_function (struct bp_location
*loc
)
4161 if (loc
->owner
->type
== bp_breakpoint
4162 || loc
->owner
->type
== bp_hardware_breakpoint
)
4164 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4166 if (loc
->function_name
)
4167 loc
->function_name
= xstrdup (loc
->function_name
);
4171 /* set_raw_breakpoint is a low level routine for allocating and
4172 partially initializing a breakpoint of type BPTYPE. The newly
4173 created breakpoint's address, section, source file name, and line
4174 number are provided by SAL. The newly created and partially
4175 initialized breakpoint is added to the breakpoint chain and
4176 is also returned as the value of this function.
4178 It is expected that the caller will complete the initialization of
4179 the newly created breakpoint struct as well as output any status
4180 information regarding the creation of a new breakpoint. In
4181 particular, set_raw_breakpoint does NOT set the breakpoint
4182 number! Care should be taken to not allow an error to occur
4183 prior to completing the initialization of the breakpoint. If this
4184 should happen, a bogus breakpoint will be left on the chain. */
4187 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4189 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4190 CORE_ADDR adjusted_address
;
4192 /* Adjust the breakpoint's address prior to allocating a location.
4193 Once we call allocate_bp_location(), that mostly uninitialized
4194 location will be placed on the location chain. Adjustment of the
4195 breakpoint may cause target_read_memory() to be called and we do
4196 not want its scan of the location chain to find a breakpoint and
4197 location that's only been partially initialized. */
4198 adjusted_address
= adjust_breakpoint_address (sal
.pc
, b
->type
);
4200 b
->loc
= allocate_bp_location (b
);
4201 b
->loc
->requested_address
= sal
.pc
;
4202 b
->loc
->address
= adjusted_address
;
4204 if (sal
.symtab
== NULL
)
4205 b
->source_file
= NULL
;
4207 b
->source_file
= savestring (sal
.symtab
->filename
,
4208 strlen (sal
.symtab
->filename
));
4209 b
->loc
->section
= sal
.section
;
4210 b
->line_number
= sal
.line
;
4212 set_breakpoint_location_function (b
->loc
);
4214 breakpoints_changed ();
4220 /* Note that the breakpoint object B describes a permanent breakpoint
4221 instruction, hard-wired into the inferior's code. */
4223 make_breakpoint_permanent (struct breakpoint
*b
)
4225 struct bp_location
*bl
;
4226 b
->enable_state
= bp_permanent
;
4228 /* By definition, permanent breakpoints are already present in the code.
4229 Mark all locations as inserted. For now, make_breakpoint_permanent
4230 is called in just one place, so it's hard to say if it's reasonable
4231 to have permanent breakpoint with multiple locations or not,
4232 but it's easy to implmement. */
4233 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4237 static struct breakpoint
*
4238 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4240 static int internal_breakpoint_number
= -1;
4241 struct symtab_and_line sal
;
4242 struct breakpoint
*b
;
4244 init_sal (&sal
); /* initialize to zeroes */
4247 sal
.section
= find_pc_overlay (sal
.pc
);
4249 b
= set_raw_breakpoint (sal
, type
);
4250 b
->number
= internal_breakpoint_number
--;
4251 b
->disposition
= disp_donttouch
;
4258 create_longjmp_breakpoint (char *func_name
)
4260 struct minimal_symbol
*m
;
4262 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4264 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4265 update_global_location_list (1);
4268 /* Call this routine when stepping and nexting to enable a breakpoint
4269 if we do a longjmp(). When we hit that breakpoint, call
4270 set_longjmp_resume_breakpoint() to figure out where we are going. */
4273 set_longjmp_breakpoint (void)
4275 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4277 create_longjmp_breakpoint ("longjmp");
4278 create_longjmp_breakpoint ("_longjmp");
4279 create_longjmp_breakpoint ("siglongjmp");
4280 create_longjmp_breakpoint ("_siglongjmp");
4284 /* Delete all longjmp breakpoints from THREAD. */
4286 delete_longjmp_breakpoint (int thread
)
4288 struct breakpoint
*b
, *temp
;
4290 ALL_BREAKPOINTS_SAFE (b
, temp
)
4291 if (b
->type
== bp_longjmp
)
4293 if (b
->thread
== thread
)
4294 delete_breakpoint (b
);
4299 create_overlay_event_breakpoint_1 (char *func_name
, struct objfile
*objfile
)
4301 struct breakpoint
*b
;
4302 struct minimal_symbol
*m
;
4304 if ((m
= lookup_minimal_symbol_text (func_name
, objfile
)) == NULL
)
4307 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4309 b
->addr_string
= xstrdup (func_name
);
4311 if (overlay_debugging
== ovly_auto
)
4313 b
->enable_state
= bp_enabled
;
4314 overlay_events_enabled
= 1;
4318 b
->enable_state
= bp_disabled
;
4319 overlay_events_enabled
= 0;
4321 update_global_location_list (1);
4325 create_overlay_event_breakpoint (char *func_name
)
4327 struct objfile
*objfile
;
4328 ALL_OBJFILES (objfile
)
4329 create_overlay_event_breakpoint_1 (func_name
, objfile
);
4333 enable_overlay_breakpoints (void)
4335 struct breakpoint
*b
;
4338 if (b
->type
== bp_overlay_event
)
4340 b
->enable_state
= bp_enabled
;
4341 update_global_location_list (1);
4342 overlay_events_enabled
= 1;
4347 disable_overlay_breakpoints (void)
4349 struct breakpoint
*b
;
4352 if (b
->type
== bp_overlay_event
)
4354 b
->enable_state
= bp_disabled
;
4355 update_global_location_list (0);
4356 overlay_events_enabled
= 0;
4361 create_thread_event_breakpoint (CORE_ADDR address
)
4363 struct breakpoint
*b
;
4365 b
= create_internal_breakpoint (address
, bp_thread_event
);
4367 b
->enable_state
= bp_enabled
;
4368 /* addr_string has to be used or breakpoint_re_set will delete me. */
4369 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4371 update_global_location_list_nothrow (1);
4377 remove_thread_event_breakpoints (void)
4379 struct breakpoint
*b
, *temp
;
4381 ALL_BREAKPOINTS_SAFE (b
, temp
)
4382 if (b
->type
== bp_thread_event
)
4383 delete_breakpoint (b
);
4386 struct captured_parse_breakpoint_args
4389 struct symtabs_and_lines
*sals_p
;
4390 char ***addr_string_p
;
4394 struct lang_and_radix
4402 remove_solib_event_breakpoints (void)
4404 struct breakpoint
*b
, *temp
;
4406 ALL_BREAKPOINTS_SAFE (b
, temp
)
4407 if (b
->type
== bp_shlib_event
)
4408 delete_breakpoint (b
);
4412 create_solib_event_breakpoint (CORE_ADDR address
)
4414 struct breakpoint
*b
;
4416 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4417 update_global_location_list_nothrow (1);
4421 /* Disable any breakpoints that are on code in shared libraries. Only
4422 apply to enabled breakpoints, disabled ones can just stay disabled. */
4425 disable_breakpoints_in_shlibs (void)
4427 struct bp_location
*loc
;
4428 int disabled_shlib_breaks
= 0;
4430 ALL_BP_LOCATIONS (loc
)
4432 struct breakpoint
*b
= loc
->owner
;
4433 /* We apply the check to all breakpoints, including disabled
4434 for those with loc->duplicate set. This is so that when breakpoint
4435 becomes enabled, or the duplicate is removed, gdb will try to insert
4436 all breakpoints. If we don't set shlib_disabled here, we'll try
4437 to insert those breakpoints and fail. */
4438 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4439 && !loc
->shlib_disabled
4441 && PC_SOLIB (loc
->address
)
4443 && solib_address (loc
->address
)
4447 loc
->shlib_disabled
= 1;
4452 /* Disable any breakpoints that are in in an unloaded shared library. Only
4453 apply to enabled breakpoints, disabled ones can just stay disabled. */
4456 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4458 struct bp_location
*loc
;
4459 int disabled_shlib_breaks
= 0;
4461 ALL_BP_LOCATIONS (loc
)
4463 struct breakpoint
*b
= loc
->owner
;
4464 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4465 || loc
->loc_type
== bp_loc_software_breakpoint
)
4466 && !loc
->shlib_disabled
)
4469 char *so_name
= PC_SOLIB (loc
->address
);
4471 char *so_name
= solib_address (loc
->address
);
4473 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4475 loc
->shlib_disabled
= 1;
4476 /* At this point, we cannot rely on remove_breakpoint
4477 succeeding so we must mark the breakpoint as not inserted
4478 to prevent future errors occurring in remove_breakpoints. */
4480 if (!disabled_shlib_breaks
)
4482 target_terminal_ours_for_output ();
4483 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4486 disabled_shlib_breaks
= 1;
4492 /* FORK & VFORK catchpoints. */
4494 /* Implement the "insert" breakpoint_ops method for fork catchpoints. */
4497 insert_catch_fork (struct breakpoint
*b
)
4499 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
4502 /* Implement the "remove" breakpoint_ops method for fork catchpoints. */
4505 remove_catch_fork (struct breakpoint
*b
)
4507 return target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
4510 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
4514 breakpoint_hit_catch_fork (struct breakpoint
*b
)
4516 return inferior_has_forked (inferior_ptid
, &b
->forked_inferior_pid
);
4519 /* Implement the "print_it" breakpoint_ops method for fork catchpoints. */
4521 static enum print_stop_action
4522 print_it_catch_fork (struct breakpoint
*b
)
4524 annotate_catchpoint (b
->number
);
4525 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
4526 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4527 return PRINT_SRC_AND_LOC
;
4530 /* Implement the "print_one" breakpoint_ops method for fork catchpoints. */
4533 print_one_catch_fork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4535 struct value_print_options opts
;
4537 get_user_print_options (&opts
);
4539 /* Field 4, the address, is omitted (which makes the columns
4540 not line up too nicely with the headers, but the effect
4541 is relatively readable). */
4542 if (opts
.addressprint
)
4543 ui_out_field_skip (uiout
, "addr");
4545 ui_out_text (uiout
, "fork");
4546 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4548 ui_out_text (uiout
, ", process ");
4549 ui_out_field_int (uiout
, "what",
4550 ptid_get_pid (b
->forked_inferior_pid
));
4551 ui_out_spaces (uiout
, 1);
4555 /* Implement the "print_mention" breakpoint_ops method for fork
4559 print_mention_catch_fork (struct breakpoint
*b
)
4561 printf_filtered (_("Catchpoint %d (fork)"), b
->number
);
4564 /* The breakpoint_ops structure to be used in fork catchpoints. */
4566 static struct breakpoint_ops catch_fork_breakpoint_ops
=
4570 breakpoint_hit_catch_fork
,
4571 print_it_catch_fork
,
4572 print_one_catch_fork
,
4573 print_mention_catch_fork
4576 /* Implement the "insert" breakpoint_ops method for vfork catchpoints. */
4579 insert_catch_vfork (struct breakpoint
*b
)
4581 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
4584 /* Implement the "remove" breakpoint_ops method for vfork catchpoints. */
4587 remove_catch_vfork (struct breakpoint
*b
)
4589 return target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
4592 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
4596 breakpoint_hit_catch_vfork (struct breakpoint
*b
)
4598 return inferior_has_vforked (inferior_ptid
, &b
->forked_inferior_pid
);
4601 /* Implement the "print_it" breakpoint_ops method for vfork catchpoints. */
4603 static enum print_stop_action
4604 print_it_catch_vfork (struct breakpoint
*b
)
4606 annotate_catchpoint (b
->number
);
4607 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
4608 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4609 return PRINT_SRC_AND_LOC
;
4612 /* Implement the "print_one" breakpoint_ops method for vfork catchpoints. */
4615 print_one_catch_vfork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4617 struct value_print_options opts
;
4619 get_user_print_options (&opts
);
4620 /* Field 4, the address, is omitted (which makes the columns
4621 not line up too nicely with the headers, but the effect
4622 is relatively readable). */
4623 if (opts
.addressprint
)
4624 ui_out_field_skip (uiout
, "addr");
4626 ui_out_text (uiout
, "vfork");
4627 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4629 ui_out_text (uiout
, ", process ");
4630 ui_out_field_int (uiout
, "what",
4631 ptid_get_pid (b
->forked_inferior_pid
));
4632 ui_out_spaces (uiout
, 1);
4636 /* Implement the "print_mention" breakpoint_ops method for vfork
4640 print_mention_catch_vfork (struct breakpoint
*b
)
4642 printf_filtered (_("Catchpoint %d (vfork)"), b
->number
);
4645 /* The breakpoint_ops structure to be used in vfork catchpoints. */
4647 static struct breakpoint_ops catch_vfork_breakpoint_ops
=
4651 breakpoint_hit_catch_vfork
,
4652 print_it_catch_vfork
,
4653 print_one_catch_vfork
,
4654 print_mention_catch_vfork
4657 /* Create a new breakpoint of the bp_catchpoint kind and return it.
4659 If TEMPFLAG is non-zero, then make the breakpoint temporary.
4660 If COND_STRING is not NULL, then store it in the breakpoint.
4661 OPS, if not NULL, is the breakpoint_ops structure associated
4662 to the catchpoint. */
4664 static struct breakpoint
*
4665 create_catchpoint (int tempflag
, char *cond_string
,
4666 struct breakpoint_ops
*ops
)
4668 struct symtab_and_line sal
;
4669 struct breakpoint
*b
;
4676 b
= set_raw_breakpoint (sal
, bp_catchpoint
);
4677 set_breakpoint_count (breakpoint_count
+ 1);
4678 b
->number
= breakpoint_count
;
4680 b
->cond_string
= (cond_string
== NULL
) ?
4681 NULL
: savestring (cond_string
, strlen (cond_string
));
4683 b
->addr_string
= NULL
;
4684 b
->enable_state
= bp_enabled
;
4685 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4689 update_global_location_list (1);
4695 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4696 struct breakpoint_ops
*ops
)
4698 struct breakpoint
*b
= create_catchpoint (tempflag
, cond_string
, ops
);
4700 /* FIXME: We should put this information in a breakpoint private data
4702 b
->forked_inferior_pid
= null_ptid
;
4705 /* Exec catchpoints. */
4708 insert_catch_exec (struct breakpoint
*b
)
4710 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
4714 remove_catch_exec (struct breakpoint
*b
)
4716 return target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
4720 breakpoint_hit_catch_exec (struct breakpoint
*b
)
4722 return inferior_has_execd (inferior_ptid
, &b
->exec_pathname
);
4725 static enum print_stop_action
4726 print_it_catch_exec (struct breakpoint
*b
)
4728 annotate_catchpoint (b
->number
);
4729 printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b
->number
,
4731 return PRINT_SRC_AND_LOC
;
4735 print_one_catch_exec (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4737 struct value_print_options opts
;
4739 get_user_print_options (&opts
);
4741 /* Field 4, the address, is omitted (which makes the columns
4742 not line up too nicely with the headers, but the effect
4743 is relatively readable). */
4744 if (opts
.addressprint
)
4745 ui_out_field_skip (uiout
, "addr");
4747 ui_out_text (uiout
, "exec");
4748 if (b
->exec_pathname
!= NULL
)
4750 ui_out_text (uiout
, ", program \"");
4751 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
4752 ui_out_text (uiout
, "\" ");
4757 print_mention_catch_exec (struct breakpoint
*b
)
4759 printf_filtered (_("Catchpoint %d (exec)"), b
->number
);
4762 static struct breakpoint_ops catch_exec_breakpoint_ops
=
4766 breakpoint_hit_catch_exec
,
4767 print_it_catch_exec
,
4768 print_one_catch_exec
,
4769 print_mention_catch_exec
4773 hw_breakpoint_used_count (void)
4775 struct breakpoint
*b
;
4780 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
4788 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4790 struct breakpoint
*b
;
4793 *other_type_used
= 0;
4796 if (breakpoint_enabled (b
))
4798 if (b
->type
== type
)
4800 else if ((b
->type
== bp_hardware_watchpoint
||
4801 b
->type
== bp_read_watchpoint
||
4802 b
->type
== bp_access_watchpoint
))
4803 *other_type_used
= 1;
4810 disable_watchpoints_before_interactive_call_start (void)
4812 struct breakpoint
*b
;
4816 if (((b
->type
== bp_watchpoint
)
4817 || (b
->type
== bp_hardware_watchpoint
)
4818 || (b
->type
== bp_read_watchpoint
)
4819 || (b
->type
== bp_access_watchpoint
))
4820 && breakpoint_enabled (b
))
4822 b
->enable_state
= bp_call_disabled
;
4823 update_global_location_list (0);
4829 enable_watchpoints_after_interactive_call_stop (void)
4831 struct breakpoint
*b
;
4835 if (((b
->type
== bp_watchpoint
)
4836 || (b
->type
== bp_hardware_watchpoint
)
4837 || (b
->type
== bp_read_watchpoint
)
4838 || (b
->type
== bp_access_watchpoint
))
4839 && (b
->enable_state
== bp_call_disabled
))
4841 b
->enable_state
= bp_enabled
;
4842 update_global_location_list (1);
4848 /* Set a breakpoint that will evaporate an end of command
4849 at address specified by SAL.
4850 Restrict it to frame FRAME if FRAME is nonzero. */
4853 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4856 struct breakpoint
*b
;
4857 b
= set_raw_breakpoint (sal
, type
);
4858 b
->enable_state
= bp_enabled
;
4859 b
->disposition
= disp_donttouch
;
4860 b
->frame_id
= frame_id
;
4862 /* If we're debugging a multi-threaded program, then we
4863 want momentary breakpoints to be active in only a
4864 single thread of control. */
4865 if (in_thread_list (inferior_ptid
))
4866 b
->thread
= pid_to_thread_id (inferior_ptid
);
4868 update_global_location_list_nothrow (1);
4874 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
4876 struct symtab_and_line sal
;
4878 sal
= find_pc_line (pc
, 0);
4880 sal
.section
= find_pc_overlay (pc
);
4881 sal
.explicit_pc
= 1;
4883 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
4887 /* Tell the user we have just set a breakpoint B. */
4890 mention (struct breakpoint
*b
)
4893 struct cleanup
*old_chain
, *ui_out_chain
;
4894 struct ui_stream
*stb
;
4895 struct value_print_options opts
;
4897 get_user_print_options (&opts
);
4899 stb
= ui_out_stream_new (uiout
);
4900 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4902 /* FIXME: This is misplaced; mention() is called by things (like
4903 hitting a watchpoint) other than breakpoint creation. It should
4904 be possible to clean this up and at the same time replace the
4905 random calls to breakpoint_changed with this hook. */
4906 observer_notify_breakpoint_created (b
->number
);
4908 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4909 b
->ops
->print_mention (b
);
4914 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4917 ui_out_text (uiout
, "Watchpoint ");
4918 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4919 ui_out_field_int (uiout
, "number", b
->number
);
4920 ui_out_text (uiout
, ": ");
4921 print_expression (b
->exp
, stb
->stream
);
4922 ui_out_field_stream (uiout
, "exp", stb
);
4923 do_cleanups (ui_out_chain
);
4925 case bp_hardware_watchpoint
:
4926 ui_out_text (uiout
, "Hardware watchpoint ");
4927 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4928 ui_out_field_int (uiout
, "number", b
->number
);
4929 ui_out_text (uiout
, ": ");
4930 print_expression (b
->exp
, stb
->stream
);
4931 ui_out_field_stream (uiout
, "exp", stb
);
4932 do_cleanups (ui_out_chain
);
4934 case bp_read_watchpoint
:
4935 ui_out_text (uiout
, "Hardware read watchpoint ");
4936 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4937 ui_out_field_int (uiout
, "number", b
->number
);
4938 ui_out_text (uiout
, ": ");
4939 print_expression (b
->exp
, stb
->stream
);
4940 ui_out_field_stream (uiout
, "exp", stb
);
4941 do_cleanups (ui_out_chain
);
4943 case bp_access_watchpoint
:
4944 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4945 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4946 ui_out_field_int (uiout
, "number", b
->number
);
4947 ui_out_text (uiout
, ": ");
4948 print_expression (b
->exp
, stb
->stream
);
4949 ui_out_field_stream (uiout
, "exp", stb
);
4950 do_cleanups (ui_out_chain
);
4953 if (ui_out_is_mi_like_p (uiout
))
4958 if (b
->disposition
== disp_del
)
4959 printf_filtered (_("Temporary breakpoint"));
4961 printf_filtered (_("Breakpoint"));
4962 printf_filtered (_(" %d"), b
->number
);
4965 case bp_hardware_breakpoint
:
4966 if (ui_out_is_mi_like_p (uiout
))
4971 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4978 case bp_longjmp_resume
:
4979 case bp_step_resume
:
4981 case bp_watchpoint_scope
:
4982 case bp_shlib_event
:
4983 case bp_thread_event
:
4984 case bp_overlay_event
:
4990 /* i18n: cagney/2005-02-11: Below needs to be merged into a
4994 printf_filtered (_(" (%s) pending."), b
->addr_string
);
4998 if (opts
.addressprint
|| b
->source_file
== NULL
)
5000 printf_filtered (" at ");
5001 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5004 printf_filtered (": file %s, line %d.",
5005 b
->source_file
, b
->line_number
);
5009 struct bp_location
*loc
= b
->loc
;
5011 for (; loc
; loc
= loc
->next
)
5013 printf_filtered (" (%d locations)", n
);
5018 do_cleanups (old_chain
);
5019 if (ui_out_is_mi_like_p (uiout
))
5021 printf_filtered ("\n");
5025 static struct bp_location
*
5026 add_location_to_breakpoint (struct breakpoint
*b
,
5027 const struct symtab_and_line
*sal
)
5029 struct bp_location
*loc
, **tmp
;
5031 loc
= allocate_bp_location (b
);
5032 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5035 loc
->requested_address
= sal
->pc
;
5036 loc
->address
= adjust_breakpoint_address (loc
->requested_address
, b
->type
);
5037 loc
->section
= sal
->section
;
5039 set_breakpoint_location_function (loc
);
5044 /* Return 1 if LOC is pointing to a permanent breakpoint,
5045 return 0 otherwise. */
5048 bp_loc_is_permanent (struct bp_location
*loc
)
5052 const gdb_byte
*brk
;
5053 gdb_byte
*target_mem
;
5054 struct cleanup
*cleanup
;
5057 gdb_assert (loc
!= NULL
);
5059 addr
= loc
->address
;
5060 brk
= gdbarch_breakpoint_from_pc (current_gdbarch
, &addr
, &len
);
5062 /* Software breakpoints unsupported? */
5066 target_mem
= alloca (len
);
5068 /* Enable the automatic memory restoration from breakpoints while
5069 we read the memory. Otherwise we could say about our temporary
5070 breakpoints they are permanent. */
5071 cleanup
= make_show_memory_breakpoints_cleanup (0);
5073 if (target_read_memory (loc
->address
, target_mem
, len
) == 0
5074 && memcmp (target_mem
, brk
, len
) == 0)
5077 do_cleanups (cleanup
);
5084 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5085 as textual description of the location, and COND_STRING
5086 as condition expression. */
5089 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5091 enum bptype type
, enum bpdisp disposition
,
5092 int thread
, int ignore_count
,
5093 struct breakpoint_ops
*ops
, int from_tty
)
5095 struct breakpoint
*b
= NULL
;
5098 if (type
== bp_hardware_breakpoint
)
5100 int i
= hw_breakpoint_used_count ();
5101 int target_resources_ok
=
5102 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5104 if (target_resources_ok
== 0)
5105 error (_("No hardware breakpoint support in the target."));
5106 else if (target_resources_ok
< 0)
5107 error (_("Hardware breakpoints used exceeds limit."));
5110 for (i
= 0; i
< sals
.nelts
; ++i
)
5112 struct symtab_and_line sal
= sals
.sals
[i
];
5113 struct bp_location
*loc
;
5116 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5120 b
= set_raw_breakpoint (sal
, type
);
5121 set_breakpoint_count (breakpoint_count
+ 1);
5122 b
->number
= breakpoint_count
;
5125 b
->cond_string
= cond_string
;
5126 b
->ignore_count
= ignore_count
;
5127 b
->enable_state
= bp_enabled
;
5128 b
->disposition
= disposition
;
5134 loc
= add_location_to_breakpoint (b
, &sal
);
5137 if (bp_loc_is_permanent (loc
))
5138 make_breakpoint_permanent (b
);
5142 char *arg
= b
->cond_string
;
5143 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5145 error (_("Garbage %s follows condition"), arg
);
5150 b
->addr_string
= addr_string
;
5152 /* addr_string has to be used or breakpoint_re_set will delete
5154 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5160 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5161 elements to fill the void space. */
5162 static void remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5164 int i
= index_to_remove
+1;
5165 int last_index
= sal
->nelts
-1;
5167 for (;i
<= last_index
; ++i
)
5168 sal
->sals
[i
-1] = sal
->sals
[i
];
5173 /* If appropriate, obtains all sals that correspond
5174 to the same file and line as SAL. This is done
5175 only if SAL does not have explicit PC and has
5176 line and file information. If we got just a single
5177 expanded sal, return the original.
5179 Otherwise, if SAL.explicit_line is not set, filter out
5180 all sals for which the name of enclosing function
5181 is different from SAL. This makes sure that if we have
5182 breakpoint originally set in template instantiation, say
5183 foo<int>(), we won't expand SAL to locations at the same
5184 line in all existing instantiations of 'foo'.
5187 struct symtabs_and_lines
5188 expand_line_sal_maybe (struct symtab_and_line sal
)
5190 struct symtabs_and_lines expanded
;
5191 CORE_ADDR original_pc
= sal
.pc
;
5192 char *original_function
= NULL
;
5196 /* If we have explicit pc, don't expand.
5197 If we have no line number, we can't expand. */
5198 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5201 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5202 expanded
.sals
[0] = sal
;
5207 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5209 expanded
= expand_line_sal (sal
);
5210 if (expanded
.nelts
== 1)
5212 /* We had one sal, we got one sal. Without futher
5213 processing, just return the original sal. */
5214 xfree (expanded
.sals
);
5216 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5217 sal
.pc
= original_pc
;
5218 expanded
.sals
[0] = sal
;
5222 if (!sal
.explicit_line
)
5224 CORE_ADDR func_addr
, func_end
;
5225 for (i
= 0; i
< expanded
.nelts
; ++i
)
5227 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5228 char *this_function
;
5229 if (find_pc_partial_function (pc
, &this_function
,
5230 &func_addr
, &func_end
))
5232 if (this_function
&&
5233 strcmp (this_function
, original_function
) != 0)
5235 remove_sal (&expanded
, i
);
5238 else if (func_addr
== pc
)
5240 /* We're at beginning of a function, and should
5242 struct symbol
*sym
= find_pc_function (pc
);
5244 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5247 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5254 if (expanded
.nelts
<= 1)
5256 /* This is un ugly workaround. If we get zero
5257 expanded sals then something is really wrong.
5258 Fix that by returnign the original sal. */
5259 xfree (expanded
.sals
);
5261 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5262 sal
.pc
= original_pc
;
5263 expanded
.sals
[0] = sal
;
5270 for (i
= 0; i
< expanded
.nelts
; ++i
)
5271 if (expanded
.sals
[i
].pc
== original_pc
)
5282 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5283 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5284 value. COND_STRING, if not NULL, specified the condition to be
5285 used for all breakpoints. Essentially the only case where
5286 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5287 function. In that case, it's still not possible to specify
5288 separate conditions for different overloaded functions, so
5289 we take just a single condition string.
5291 NOTE: If the function succeeds, the caller is expected to cleanup
5292 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5293 array contents). If the function fails (error() is called), the
5294 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5295 COND and SALS arrays and each of those arrays contents. */
5298 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5300 enum bptype type
, enum bpdisp disposition
,
5301 int thread
, int ignore_count
,
5302 struct breakpoint_ops
*ops
, int from_tty
)
5305 for (i
= 0; i
< sals
.nelts
; ++i
)
5307 struct symtabs_and_lines expanded
=
5308 expand_line_sal_maybe (sals
.sals
[i
]);
5310 create_breakpoint (expanded
, addr_string
[i
],
5311 cond_string
, type
, disposition
,
5312 thread
, ignore_count
, ops
, from_tty
);
5315 update_global_location_list (1);
5318 /* Parse ARG which is assumed to be a SAL specification possibly
5319 followed by conditionals. On return, SALS contains an array of SAL
5320 addresses found. ADDR_STRING contains a vector of (canonical)
5321 address strings. ARG points to the end of the SAL. */
5324 parse_breakpoint_sals (char **address
,
5325 struct symtabs_and_lines
*sals
,
5326 char ***addr_string
,
5329 char *addr_start
= *address
;
5330 *addr_string
= NULL
;
5331 /* If no arg given, or if first arg is 'if ', use the default
5333 if ((*address
) == NULL
5334 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5336 if (default_breakpoint_valid
)
5338 struct symtab_and_line sal
;
5339 init_sal (&sal
); /* initialize to zeroes */
5340 sals
->sals
= (struct symtab_and_line
*)
5341 xmalloc (sizeof (struct symtab_and_line
));
5342 sal
.pc
= default_breakpoint_address
;
5343 sal
.line
= default_breakpoint_line
;
5344 sal
.symtab
= default_breakpoint_symtab
;
5345 sal
.section
= find_pc_overlay (sal
.pc
);
5346 sals
->sals
[0] = sal
;
5350 error (_("No default breakpoint address now."));
5354 /* Force almost all breakpoints to be in terms of the
5355 current_source_symtab (which is decode_line_1's default). This
5356 should produce the results we want almost all of the time while
5357 leaving default_breakpoint_* alone.
5358 ObjC: However, don't match an Objective-C method name which
5359 may have a '+' or '-' succeeded by a '[' */
5361 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5363 if (default_breakpoint_valid
5365 || ((strchr ("+-", (*address
)[0]) != NULL
)
5366 && ((*address
)[1] != '['))))
5367 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5368 default_breakpoint_line
, addr_string
,
5371 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5372 addr_string
, not_found_ptr
);
5374 /* For any SAL that didn't have a canonical string, fill one in. */
5375 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5376 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5377 if (addr_start
!= (*address
))
5380 for (i
= 0; i
< sals
->nelts
; i
++)
5382 /* Add the string if not present. */
5383 if ((*addr_string
)[i
] == NULL
)
5384 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5390 /* Convert each SAL into a real PC. Verify that the PC can be
5391 inserted as a breakpoint. If it can't throw an error. */
5394 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5398 for (i
= 0; i
< sals
->nelts
; i
++)
5399 resolve_sal_pc (&sals
->sals
[i
]);
5403 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5405 struct captured_parse_breakpoint_args
*args
= data
;
5407 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5408 args
->not_found_ptr
);
5411 /* Given TOK, a string specification of condition and thread, as
5412 accepted by the 'break' command, extract the condition
5413 string and thread number and set *COND_STRING and *THREAD.
5414 PC identifies the context at which the condition should be parsed.
5415 If no condition is found, *COND_STRING is set to NULL.
5416 If no thread is found, *THREAD is set to -1. */
5418 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5419 char **cond_string
, int *thread
)
5421 *cond_string
= NULL
;
5427 char *cond_start
= NULL
;
5428 char *cond_end
= NULL
;
5429 while (*tok
== ' ' || *tok
== '\t')
5434 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5437 toklen
= end_tok
- tok
;
5439 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5441 struct expression
*expr
;
5443 tok
= cond_start
= end_tok
+ 1;
5444 expr
= parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5447 *cond_string
= savestring (cond_start
,
5448 cond_end
- cond_start
);
5450 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5456 *thread
= strtol (tok
, &tok
, 0);
5458 error (_("Junk after thread keyword."));
5459 if (!valid_thread_id (*thread
))
5460 error (_("Unknown thread %d."), *thread
);
5463 error (_("Junk at end of arguments."));
5467 /* Set a breakpoint. This function is shared between
5468 CLI and MI functions for setting a breakpoint.
5469 This function has two major modes of operations,
5470 selected by the PARSE_CONDITION_AND_THREAD parameter.
5471 If non-zero, the function will parse arg, extracting
5472 breakpoint location, address and thread. Otherwise,
5473 ARG is just the location of breakpoint, with condition
5474 and thread specified by the COND_STRING and THREAD
5478 break_command_really (char *arg
, char *cond_string
, int thread
,
5479 int parse_condition_and_thread
,
5480 int tempflag
, int hardwareflag
,
5482 enum auto_boolean pending_break_support
,
5483 struct breakpoint_ops
*ops
,
5486 struct gdb_exception e
;
5487 struct symtabs_and_lines sals
;
5488 struct symtab_and_line pending_sal
;
5491 char *addr_start
= arg
;
5493 struct cleanup
*old_chain
;
5494 struct cleanup
*breakpoint_chain
= NULL
;
5495 struct captured_parse_breakpoint_args parse_args
;
5504 parse_args
.arg_p
= &arg
;
5505 parse_args
.sals_p
= &sals
;
5506 parse_args
.addr_string_p
= &addr_string
;
5507 parse_args
.not_found_ptr
= ¬_found
;
5509 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5510 &parse_args
, RETURN_MASK_ALL
);
5512 /* If caller is interested in rc value from parse, set value. */
5516 throw_exception (e
);
5520 case NOT_FOUND_ERROR
:
5522 /* If pending breakpoint support is turned off, throw
5525 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5526 throw_exception (e
);
5528 exception_print (gdb_stderr
, e
);
5530 /* If pending breakpoint support is auto query and the user
5531 selects no, then simply return the error code. */
5532 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5533 !nquery ("Make breakpoint pending on future shared library load? "))
5536 /* At this point, either the user was queried about setting
5537 a pending breakpoint and selected yes, or pending
5538 breakpoint behavior is on and thus a pending breakpoint
5539 is defaulted on behalf of the user. */
5540 copy_arg
= xstrdup (addr_start
);
5541 addr_string
= ©_arg
;
5543 sals
.sals
= &pending_sal
;
5548 throw_exception (e
);
5555 /* Create a chain of things that always need to be cleaned up. */
5556 old_chain
= make_cleanup (null_cleanup
, 0);
5560 /* Make sure that all storage allocated to SALS gets freed. */
5561 make_cleanup (xfree
, sals
.sals
);
5563 /* Cleanup the addr_string array but not its contents. */
5564 make_cleanup (xfree
, addr_string
);
5567 /* ----------------------------- SNIP -----------------------------
5568 Anything added to the cleanup chain beyond this point is assumed
5569 to be part of a breakpoint. If the breakpoint create succeeds
5570 then the memory is not reclaimed. */
5571 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5573 /* Mark the contents of the addr_string for cleanup. These go on
5574 the breakpoint_chain and only occure if the breakpoint create
5576 for (i
= 0; i
< sals
.nelts
; i
++)
5578 if (addr_string
[i
] != NULL
)
5579 make_cleanup (xfree
, addr_string
[i
]);
5582 /* Resolve all line numbers to PC's and verify that the addresses
5583 are ok for the target. */
5585 breakpoint_sals_to_pc (&sals
, addr_start
);
5587 /* Verify that condition can be parsed, before setting any
5588 breakpoints. Allocate a separate condition expression for each
5592 if (parse_condition_and_thread
)
5594 /* Here we only parse 'arg' to separate condition
5595 from thread number, so parsing in context of first
5596 sal is OK. When setting the breakpoint we'll
5597 re-parse it in context of each sal. */
5600 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5602 make_cleanup (xfree
, cond_string
);
5606 /* Create a private copy of condition string. */
5609 cond_string
= xstrdup (cond_string
);
5610 make_cleanup (xfree
, cond_string
);
5613 create_breakpoints (sals
, addr_string
, cond_string
,
5614 hardwareflag
? bp_hardware_breakpoint
5616 tempflag
? disp_del
: disp_donttouch
,
5617 thread
, ignore_count
, ops
, from_tty
);
5621 struct symtab_and_line sal
= {0};
5622 struct breakpoint
*b
;
5624 make_cleanup (xfree
, copy_arg
);
5626 b
= set_raw_breakpoint_without_location (hardwareflag
5627 ? bp_hardware_breakpoint
5629 set_breakpoint_count (breakpoint_count
+ 1);
5630 b
->number
= breakpoint_count
;
5632 b
->addr_string
= addr_string
[0];
5633 b
->cond_string
= NULL
;
5634 b
->ignore_count
= ignore_count
;
5635 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5636 b
->condition_not_parsed
= 1;
5639 update_global_location_list (1);
5644 warning (_("Multiple breakpoints were set.\n"
5645 "Use the \"delete\" command to delete unwanted breakpoints."));
5646 /* That's it. Discard the cleanups for data inserted into the
5648 discard_cleanups (breakpoint_chain
);
5649 /* But cleanup everything else. */
5650 do_cleanups (old_chain
);
5653 /* Set a breakpoint.
5654 ARG is a string describing breakpoint address,
5655 condition, and thread.
5656 FLAG specifies if a breakpoint is hardware on,
5657 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5661 break_command_1 (char *arg
, int flag
, int from_tty
)
5663 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5664 int tempflag
= flag
& BP_TEMPFLAG
;
5666 break_command_really (arg
,
5667 NULL
, 0, 1 /* parse arg */,
5668 tempflag
, hardwareflag
,
5669 0 /* Ignore count */,
5670 pending_break_support
,
5671 NULL
/* breakpoint_ops */,
5677 set_breakpoint (char *address
, char *condition
,
5678 int hardwareflag
, int tempflag
,
5679 int thread
, int ignore_count
,
5682 break_command_really (address
, condition
, thread
,
5683 0 /* condition and thread are valid. */,
5684 tempflag
, hardwareflag
,
5687 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5691 /* Adjust SAL to the first instruction past the function prologue.
5692 The end of the prologue is determined using the line table from
5693 the debugging information.
5695 If SAL is already past the prologue, then do nothing. */
5698 skip_prologue_sal (struct symtab_and_line
*sal
)
5700 struct symbol
*sym
= find_pc_function (sal
->pc
);
5701 struct symtab_and_line start_sal
;
5706 start_sal
= find_function_start_sal (sym
, 1);
5707 if (sal
->pc
< start_sal
.pc
)
5711 /* Helper function for break_command_1 and disassemble_command. */
5714 resolve_sal_pc (struct symtab_and_line
*sal
)
5718 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5720 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5721 error (_("No line %d in file \"%s\"."),
5722 sal
->line
, sal
->symtab
->filename
);
5725 /* If this SAL corresponds to a breakpoint inserted using
5726 a line number, then skip the function prologue if necessary. */
5727 if (sal
->explicit_line
)
5728 skip_prologue_sal (sal
);
5731 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5733 struct blockvector
*bv
;
5737 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5740 sym
= block_linkage_function (b
);
5743 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5744 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
5748 /* It really is worthwhile to have the section, so we'll just
5749 have to look harder. This case can be executed if we have
5750 line numbers but no functions (as can happen in assembly
5753 struct minimal_symbol
*msym
;
5755 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5757 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
5764 break_command (char *arg
, int from_tty
)
5766 break_command_1 (arg
, 0, from_tty
);
5770 tbreak_command (char *arg
, int from_tty
)
5772 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5776 hbreak_command (char *arg
, int from_tty
)
5778 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5782 thbreak_command (char *arg
, int from_tty
)
5784 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5788 stop_command (char *arg
, int from_tty
)
5790 printf_filtered (_("Specify the type of breakpoint to set.\n\
5791 Usage: stop in <function | address>\n\
5792 stop at <line>\n"));
5796 stopin_command (char *arg
, int from_tty
)
5800 if (arg
== (char *) NULL
)
5802 else if (*arg
!= '*')
5807 /* look for a ':'. If this is a line number specification, then
5808 say it is bad, otherwise, it should be an address or
5809 function/method name */
5810 while (*argptr
&& !hasColon
)
5812 hasColon
= (*argptr
== ':');
5817 badInput
= (*argptr
!= ':'); /* Not a class::method */
5819 badInput
= isdigit (*arg
); /* a simple line number */
5823 printf_filtered (_("Usage: stop in <function | address>\n"));
5825 break_command_1 (arg
, 0, from_tty
);
5829 stopat_command (char *arg
, int from_tty
)
5833 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5840 /* look for a ':'. If there is a '::' then get out, otherwise
5841 it is probably a line number. */
5842 while (*argptr
&& !hasColon
)
5844 hasColon
= (*argptr
== ':');
5849 badInput
= (*argptr
== ':'); /* we have class::method */
5851 badInput
= !isdigit (*arg
); /* not a line number */
5855 printf_filtered (_("Usage: stop at <line>\n"));
5857 break_command_1 (arg
, 0, from_tty
);
5860 /* accessflag: hw_write: watch write,
5861 hw_read: watch read,
5862 hw_access: watch access (read or write) */
5864 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5866 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
5867 struct symtab_and_line sal
;
5868 struct expression
*exp
;
5869 struct block
*exp_valid_block
;
5870 struct value
*val
, *mark
;
5871 struct frame_info
*frame
;
5872 struct frame_info
*prev_frame
= NULL
;
5873 char *exp_start
= NULL
;
5874 char *exp_end
= NULL
;
5875 char *tok
, *id_tok_start
, *end_tok
;
5877 char *cond_start
= NULL
;
5878 char *cond_end
= NULL
;
5879 struct expression
*cond
= NULL
;
5880 int i
, other_type_used
, target_resources_ok
= 0;
5881 enum bptype bp_type
;
5885 init_sal (&sal
); /* initialize to zeroes */
5887 /* Make sure that we actually have parameters to parse. */
5888 if (arg
!= NULL
&& arg
[0] != '\0')
5890 toklen
= strlen (arg
); /* Size of argument list. */
5892 /* Points tok to the end of the argument list. */
5893 tok
= arg
+ toklen
- 1;
5895 /* Go backwards in the parameters list. Skip the last parameter.
5896 If we're expecting a 'thread <thread_num>' parameter, this should
5897 be the thread identifier. */
5898 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5900 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5903 /* Points end_tok to the beginning of the last token. */
5904 id_tok_start
= tok
+ 1;
5906 /* Go backwards in the parameters list. Skip one more parameter.
5907 If we're expecting a 'thread <thread_num>' parameter, we should
5908 reach a "thread" token. */
5909 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5914 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5917 /* Move the pointer forward to skip the whitespace and
5918 calculate the length of the token. */
5920 toklen
= end_tok
- tok
;
5922 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5924 /* At this point we've found a "thread" token, which means
5925 the user is trying to set a watchpoint that triggers
5926 only in a specific thread. */
5929 /* Extract the thread ID from the next token. */
5930 thread
= strtol (id_tok_start
, &endp
, 0);
5932 /* Check if the user provided a valid numeric value for the
5934 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
5935 error (_("Invalid thread ID specification %s."), id_tok_start
);
5937 /* Check if the thread actually exists. */
5938 if (!valid_thread_id (thread
))
5939 error (_("Unknown thread %d."), thread
);
5941 /* Truncate the string and get rid of the thread <thread_num>
5942 parameter before the parameter list is parsed by the
5943 evaluate_expression() function. */
5948 /* Parse the rest of the arguments. */
5949 innermost_block
= NULL
;
5951 exp
= parse_exp_1 (&arg
, 0, 0);
5953 exp_valid_block
= innermost_block
;
5954 mark
= value_mark ();
5955 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
5957 release_value (val
);
5960 while (*tok
== ' ' || *tok
== '\t')
5964 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5967 toklen
= end_tok
- tok
;
5968 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5970 tok
= cond_start
= end_tok
+ 1;
5971 cond
= parse_exp_1 (&tok
, 0, 0);
5975 error (_("Junk at end of command."));
5977 if (accessflag
== hw_read
)
5978 bp_type
= bp_read_watchpoint
;
5979 else if (accessflag
== hw_access
)
5980 bp_type
= bp_access_watchpoint
;
5982 bp_type
= bp_hardware_watchpoint
;
5984 mem_cnt
= can_use_hardware_watchpoint (val
);
5985 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5986 error (_("Expression cannot be implemented with read/access watchpoint."));
5989 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5990 target_resources_ok
=
5991 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5993 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5994 error (_("Target does not support this type of hardware watchpoint."));
5996 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5997 error (_("Target can only support one kind of HW watchpoint at a time."));
6000 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
6001 watchpoint could not be set. */
6002 if (!mem_cnt
|| target_resources_ok
<= 0)
6003 bp_type
= bp_watchpoint
;
6005 frame
= block_innermost_frame (exp_valid_block
);
6007 prev_frame
= get_prev_frame (frame
);
6011 /* If the expression is "local", then set up a "watchpoint scope"
6012 breakpoint at the point where we've left the scope of the watchpoint
6013 expression. Create the scope breakpoint before the watchpoint, so
6014 that we will encounter it first in bpstat_stop_status. */
6015 if (innermost_block
&& prev_frame
)
6017 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
6018 bp_watchpoint_scope
);
6020 scope_breakpoint
->enable_state
= bp_enabled
;
6022 /* Automatically delete the breakpoint when it hits. */
6023 scope_breakpoint
->disposition
= disp_del
;
6025 /* Only break in the proper frame (help with recursion). */
6026 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
6028 /* Set the address at which we will stop. */
6029 scope_breakpoint
->loc
->requested_address
6030 = get_frame_pc (prev_frame
);
6031 scope_breakpoint
->loc
->address
6032 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
6033 scope_breakpoint
->type
);
6036 /* Now set up the breakpoint. */
6037 b
= set_raw_breakpoint (sal
, bp_type
);
6038 set_breakpoint_count (breakpoint_count
+ 1);
6039 b
->number
= breakpoint_count
;
6041 b
->disposition
= disp_donttouch
;
6043 b
->exp_valid_block
= exp_valid_block
;
6044 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6047 b
->loc
->cond
= cond
;
6049 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6054 b
->watchpoint_frame
= get_frame_id (frame
);
6056 b
->watchpoint_frame
= null_frame_id
;
6058 if (scope_breakpoint
!= NULL
)
6060 /* The scope breakpoint is related to the watchpoint. We will
6061 need to act on them together. */
6062 b
->related_breakpoint
= scope_breakpoint
;
6063 scope_breakpoint
->related_breakpoint
= b
;
6066 value_free_to_mark (mark
);
6068 update_global_location_list (1);
6071 /* Return count of locations need to be watched and can be handled
6072 in hardware. If the watchpoint can not be handled
6073 in hardware return zero. */
6076 can_use_hardware_watchpoint (struct value
*v
)
6078 int found_memory_cnt
= 0;
6079 struct value
*head
= v
;
6081 /* Did the user specifically forbid us to use hardware watchpoints? */
6082 if (!can_use_hw_watchpoints
)
6085 /* Make sure that the value of the expression depends only upon
6086 memory contents, and values computed from them within GDB. If we
6087 find any register references or function calls, we can't use a
6088 hardware watchpoint.
6090 The idea here is that evaluating an expression generates a series
6091 of values, one holding the value of every subexpression. (The
6092 expression a*b+c has five subexpressions: a, b, a*b, c, and
6093 a*b+c.) GDB's values hold almost enough information to establish
6094 the criteria given above --- they identify memory lvalues,
6095 register lvalues, computed values, etcetera. So we can evaluate
6096 the expression, and then scan the chain of values that leaves
6097 behind to decide whether we can detect any possible change to the
6098 expression's final value using only hardware watchpoints.
6100 However, I don't think that the values returned by inferior
6101 function calls are special in any way. So this function may not
6102 notice that an expression involving an inferior function call
6103 can't be watched with hardware watchpoints. FIXME. */
6104 for (; v
; v
= value_next (v
))
6106 if (VALUE_LVAL (v
) == lval_memory
)
6109 /* A lazy memory lvalue is one that GDB never needed to fetch;
6110 we either just used its address (e.g., `a' in `a.b') or
6111 we never needed it at all (e.g., `a' in `a,b'). */
6115 /* Ahh, memory we actually used! Check if we can cover
6116 it with hardware watchpoints. */
6117 struct type
*vtype
= check_typedef (value_type (v
));
6119 /* We only watch structs and arrays if user asked for it
6120 explicitly, never if they just happen to appear in a
6121 middle of some value chain. */
6123 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6124 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6126 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
6127 int len
= TYPE_LENGTH (value_type (v
));
6129 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6136 else if (VALUE_LVAL (v
) != not_lval
6137 && deprecated_value_modifiable (v
) == 0)
6138 return 0; /* ??? What does this represent? */
6139 else if (VALUE_LVAL (v
) == lval_register
)
6140 return 0; /* cannot watch a register with a HW watchpoint */
6143 /* The expression itself looks suitable for using a hardware
6144 watchpoint, but give the target machine a chance to reject it. */
6145 return found_memory_cnt
;
6149 watch_command_wrapper (char *arg
, int from_tty
)
6151 watch_command (arg
, from_tty
);
6155 watch_command (char *arg
, int from_tty
)
6157 watch_command_1 (arg
, hw_write
, from_tty
);
6161 rwatch_command_wrapper (char *arg
, int from_tty
)
6163 rwatch_command (arg
, from_tty
);
6167 rwatch_command (char *arg
, int from_tty
)
6169 watch_command_1 (arg
, hw_read
, from_tty
);
6173 awatch_command_wrapper (char *arg
, int from_tty
)
6175 awatch_command (arg
, from_tty
);
6179 awatch_command (char *arg
, int from_tty
)
6181 watch_command_1 (arg
, hw_access
, from_tty
);
6185 /* Helper routines for the until_command routine in infcmd.c. Here
6186 because it uses the mechanisms of breakpoints. */
6188 struct until_break_command_continuation_args
6190 struct breakpoint
*breakpoint
;
6191 struct breakpoint
*breakpoint2
;
6194 /* This function is called by fetch_inferior_event via the
6195 cmd_continuation pointer, to complete the until command. It takes
6196 care of cleaning up the temporary breakpoints set up by the until
6199 until_break_command_continuation (void *arg
)
6201 struct until_break_command_continuation_args
*a
= arg
;
6203 delete_breakpoint (a
->breakpoint
);
6205 delete_breakpoint (a
->breakpoint2
);
6209 until_break_command (char *arg
, int from_tty
, int anywhere
)
6211 struct symtabs_and_lines sals
;
6212 struct symtab_and_line sal
;
6213 struct frame_info
*frame
= get_selected_frame (NULL
);
6214 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6215 struct breakpoint
*breakpoint
;
6216 struct breakpoint
*breakpoint2
= NULL
;
6217 struct cleanup
*old_chain
;
6219 clear_proceed_status ();
6221 /* Set a breakpoint where the user wants it and at return from
6224 if (default_breakpoint_valid
)
6225 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6226 default_breakpoint_line
, (char ***) NULL
, NULL
);
6228 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6229 0, (char ***) NULL
, NULL
);
6231 if (sals
.nelts
!= 1)
6232 error (_("Couldn't get information on specified line."));
6235 xfree (sals
.sals
); /* malloc'd, so freed */
6238 error (_("Junk at end of arguments."));
6240 resolve_sal_pc (&sal
);
6243 /* If the user told us to continue until a specified location,
6244 we don't specify a frame at which we need to stop. */
6245 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6247 /* Otherwise, specify the current frame, because we want to stop only
6248 at the very same frame. */
6249 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6252 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6254 /* Keep within the current frame, or in frames called by the current
6258 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6259 sal
.pc
= get_frame_pc (prev_frame
);
6260 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6262 make_cleanup_delete_breakpoint (breakpoint2
);
6265 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6267 /* If we are running asynchronously, and proceed call above has actually
6268 managed to start the target, arrange for breakpoints to be
6269 deleted when the target stops. Otherwise, we're already stopped and
6270 delete breakpoints via cleanup chain. */
6272 if (target_can_async_p () && is_running (inferior_ptid
))
6274 struct until_break_command_continuation_args
*args
;
6275 args
= xmalloc (sizeof (*args
));
6277 args
->breakpoint
= breakpoint
;
6278 args
->breakpoint2
= breakpoint2
;
6280 discard_cleanups (old_chain
);
6281 add_continuation (inferior_thread (),
6282 until_break_command_continuation
, args
,
6286 do_cleanups (old_chain
);
6290 ep_skip_leading_whitespace (char **s
)
6292 if ((s
== NULL
) || (*s
== NULL
))
6294 while (isspace (**s
))
6298 /* This function attempts to parse an optional "if <cond>" clause
6299 from the arg string. If one is not found, it returns NULL.
6301 Else, it returns a pointer to the condition string. (It does not
6302 attempt to evaluate the string against a particular block.) And,
6303 it updates arg to point to the first character following the parsed
6304 if clause in the arg string. */
6307 ep_parse_optional_if_clause (char **arg
)
6311 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6314 /* Skip the "if" keyword. */
6317 /* Skip any extra leading whitespace, and record the start of the
6318 condition string. */
6319 ep_skip_leading_whitespace (arg
);
6322 /* Assume that the condition occupies the remainder of the arg string. */
6323 (*arg
) += strlen (cond_string
);
6328 /* This function attempts to parse an optional filename from the arg
6329 string. If one is not found, it returns NULL.
6331 Else, it returns a pointer to the parsed filename. (This function
6332 makes no attempt to verify that a file of that name exists, or is
6333 accessible.) And, it updates arg to point to the first character
6334 following the parsed filename in the arg string.
6336 Note that clients needing to preserve the returned filename for
6337 future access should copy it to their own buffers. */
6339 ep_parse_optional_filename (char **arg
)
6341 static char filename
[1024];
6346 if ((*arg_p
== '\0') || isspace (*arg_p
))
6364 /* Commands to deal with catching events, such as signals, exceptions,
6365 process start/exit, etc. */
6369 catch_fork_temporary
, catch_vfork_temporary
,
6370 catch_fork_permanent
, catch_vfork_permanent
6375 catch_fork_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6377 char *cond_string
= NULL
;
6378 catch_fork_kind fork_kind
;
6381 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
6382 tempflag
= (fork_kind
== catch_fork_temporary
6383 || fork_kind
== catch_vfork_temporary
);
6387 ep_skip_leading_whitespace (&arg
);
6389 /* The allowed syntax is:
6391 catch [v]fork if <cond>
6393 First, check if there's an if clause. */
6394 cond_string
= ep_parse_optional_if_clause (&arg
);
6396 if ((*arg
!= '\0') && !isspace (*arg
))
6397 error (_("Junk at end of arguments."));
6399 /* If this target supports it, create a fork or vfork catchpoint
6400 and enable reporting of such events. */
6403 case catch_fork_temporary
:
6404 case catch_fork_permanent
:
6405 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6406 &catch_fork_breakpoint_ops
);
6408 case catch_vfork_temporary
:
6409 case catch_vfork_permanent
:
6410 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6411 &catch_vfork_breakpoint_ops
);
6414 error (_("unsupported or unknown fork kind; cannot catch it"));
6420 catch_exec_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6423 char *cond_string
= NULL
;
6425 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6429 ep_skip_leading_whitespace (&arg
);
6431 /* The allowed syntax is:
6433 catch exec if <cond>
6435 First, check if there's an if clause. */
6436 cond_string
= ep_parse_optional_if_clause (&arg
);
6438 if ((*arg
!= '\0') && !isspace (*arg
))
6439 error (_("Junk at end of arguments."));
6441 /* If this target supports it, create an exec catchpoint
6442 and enable reporting of such events. */
6443 create_catchpoint (tempflag
, cond_string
, &catch_exec_breakpoint_ops
);
6446 static enum print_stop_action
6447 print_exception_catchpoint (struct breakpoint
*b
)
6449 int bp_temp
, bp_throw
;
6451 annotate_catchpoint (b
->number
);
6453 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6454 if (b
->loc
->address
!= b
->loc
->requested_address
)
6455 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6458 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6460 bp_temp
? "Temporary catchpoint "
6462 if (!ui_out_is_mi_like_p (uiout
))
6463 ui_out_field_int (uiout
, "bkptno", b
->number
);
6465 bp_throw
? " (exception thrown), "
6466 : " (exception caught), ");
6467 if (ui_out_is_mi_like_p (uiout
))
6469 ui_out_field_string (uiout
, "reason",
6470 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6471 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6472 ui_out_field_int (uiout
, "bkptno", b
->number
);
6474 return PRINT_SRC_AND_LOC
;
6478 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6480 struct value_print_options opts
;
6481 get_user_print_options (&opts
);
6482 if (opts
.addressprint
)
6485 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6486 ui_out_field_string (uiout
, "addr", "<PENDING>");
6488 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6492 *last_addr
= b
->loc
->address
;
6493 if (strstr (b
->addr_string
, "throw") != NULL
)
6494 ui_out_field_string (uiout
, "what", "exception throw");
6496 ui_out_field_string (uiout
, "what", "exception catch");
6500 print_mention_exception_catchpoint (struct breakpoint
*b
)
6505 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6506 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6507 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6508 : _("Catchpoint "));
6509 ui_out_field_int (uiout
, "bkptno", b
->number
);
6510 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6514 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6517 NULL
, /* breakpoint_hit */
6518 print_exception_catchpoint
,
6519 print_one_exception_catchpoint
,
6520 print_mention_exception_catchpoint
6524 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6525 enum exception_event_kind ex_event
, int from_tty
)
6527 char *trigger_func_name
;
6529 if (ex_event
== EX_EVENT_CATCH
)
6530 trigger_func_name
= "__cxa_begin_catch";
6532 trigger_func_name
= "__cxa_throw";
6534 break_command_really (trigger_func_name
, cond_string
, -1,
6535 0 /* condition and thread are valid. */,
6538 AUTO_BOOLEAN_TRUE
/* pending */,
6539 &gnu_v3_exception_catchpoint_ops
, from_tty
);
6544 /* Deal with "catch catch" and "catch throw" commands */
6547 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6548 int tempflag
, int from_tty
)
6550 char *cond_string
= NULL
;
6551 struct symtab_and_line
*sal
= NULL
;
6555 ep_skip_leading_whitespace (&arg
);
6557 cond_string
= ep_parse_optional_if_clause (&arg
);
6559 if ((*arg
!= '\0') && !isspace (*arg
))
6560 error (_("Junk at end of arguments."));
6562 if ((ex_event
!= EX_EVENT_THROW
) &&
6563 (ex_event
!= EX_EVENT_CATCH
))
6564 error (_("Unsupported or unknown exception event; cannot catch it"));
6566 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6569 warning (_("Unsupported with this platform/compiler combination."));
6572 /* Implementation of "catch catch" command. */
6575 catch_catch_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6577 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6578 catch_exception_command_1 (EX_EVENT_CATCH
, arg
, tempflag
, from_tty
);
6581 /* Implementation of "catch throw" command. */
6584 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6586 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6587 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
6590 /* Create a breakpoint struct for Ada exception catchpoints. */
6593 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6597 struct expression
*cond
,
6598 struct breakpoint_ops
*ops
,
6602 struct breakpoint
*b
;
6606 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6607 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6608 version for exception catchpoints, because two catchpoints
6609 used for different exception names will use the same address.
6610 In this case, a "breakpoint ... also set at..." warning is
6611 unproductive. Besides. the warning phrasing is also a bit
6612 inapropriate, we should use the word catchpoint, and tell
6613 the user what type of catchpoint it is. The above is good
6614 enough for now, though. */
6617 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6618 set_breakpoint_count (breakpoint_count
+ 1);
6620 b
->enable_state
= bp_enabled
;
6621 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6622 b
->number
= breakpoint_count
;
6623 b
->ignore_count
= 0;
6624 b
->loc
->cond
= cond
;
6625 b
->addr_string
= addr_string
;
6626 b
->language
= language_ada
;
6627 b
->cond_string
= cond_string
;
6628 b
->exp_string
= exp_string
;
6633 update_global_location_list (1);
6636 /* Implement the "catch exception" command. */
6639 catch_ada_exception_command (char *arg
, int from_tty
,
6640 struct cmd_list_element
*command
)
6643 struct symtab_and_line sal
;
6645 char *addr_string
= NULL
;
6646 char *exp_string
= NULL
;
6647 char *cond_string
= NULL
;
6648 struct expression
*cond
= NULL
;
6649 struct breakpoint_ops
*ops
= NULL
;
6651 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6655 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6656 &cond_string
, &cond
, &ops
);
6657 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6658 cond_string
, cond
, ops
, tempflag
,
6662 /* Implement the "catch assert" command. */
6665 catch_assert_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6668 struct symtab_and_line sal
;
6669 char *addr_string
= NULL
;
6670 struct breakpoint_ops
*ops
= NULL
;
6672 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6676 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6677 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6678 tempflag
, from_tty
);
6682 catch_command (char *arg
, int from_tty
)
6684 error (_("Catch requires an event name."));
6689 tcatch_command (char *arg
, int from_tty
)
6691 error (_("Catch requires an event name."));
6694 /* Delete breakpoints by address or line. */
6697 clear_command (char *arg
, int from_tty
)
6699 struct breakpoint
*b
;
6700 VEC(breakpoint_p
) *found
= 0;
6703 struct symtabs_and_lines sals
;
6704 struct symtab_and_line sal
;
6709 sals
= decode_line_spec (arg
, 1);
6714 sals
.sals
= (struct symtab_and_line
*)
6715 xmalloc (sizeof (struct symtab_and_line
));
6716 make_cleanup (xfree
, sals
.sals
);
6717 init_sal (&sal
); /* initialize to zeroes */
6718 sal
.line
= default_breakpoint_line
;
6719 sal
.symtab
= default_breakpoint_symtab
;
6720 sal
.pc
= default_breakpoint_address
;
6721 if (sal
.symtab
== 0)
6722 error (_("No source file specified."));
6730 /* We don't call resolve_sal_pc here. That's not
6731 as bad as it seems, because all existing breakpoints
6732 typically have both file/line and pc set. So, if
6733 clear is given file/line, we can match this to existing
6734 breakpoint without obtaining pc at all.
6736 We only support clearing given the address explicitly
6737 present in breakpoint table. Say, we've set breakpoint
6738 at file:line. There were several PC values for that file:line,
6739 due to optimization, all in one block.
6740 We've picked one PC value. If "clear" is issued with another
6741 PC corresponding to the same file:line, the breakpoint won't
6742 be cleared. We probably can still clear the breakpoint, but
6743 since the other PC value is never presented to user, user
6744 can only find it by guessing, and it does not seem important
6747 /* For each line spec given, delete bps which correspond
6748 to it. Do it in two passes, solely to preserve the current
6749 behavior that from_tty is forced true if we delete more than
6753 for (i
= 0; i
< sals
.nelts
; i
++)
6755 /* If exact pc given, clear bpts at that pc.
6756 If line given (pc == 0), clear all bpts on specified line.
6757 If defaulting, clear all bpts on default line
6760 defaulting sal.pc != 0 tests to do
6765 1 0 <can't happen> */
6769 /* Find all matching breakpoints and add them to
6774 /* Are we going to delete b? */
6775 if (b
->type
!= bp_none
6776 && b
->type
!= bp_watchpoint
6777 && b
->type
!= bp_hardware_watchpoint
6778 && b
->type
!= bp_read_watchpoint
6779 && b
->type
!= bp_access_watchpoint
)
6781 struct bp_location
*loc
= b
->loc
;
6782 for (; loc
; loc
= loc
->next
)
6784 int pc_match
= sal
.pc
6785 && (loc
->address
== sal
.pc
)
6786 && (!section_is_overlay (loc
->section
)
6787 || loc
->section
== sal
.section
);
6788 int line_match
= ((default_match
|| (0 == sal
.pc
))
6789 && b
->source_file
!= NULL
6790 && sal
.symtab
!= NULL
6791 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6792 && b
->line_number
== sal
.line
);
6793 if (pc_match
|| line_match
)
6802 VEC_safe_push(breakpoint_p
, found
, b
);
6805 /* Now go thru the 'found' chain and delete them. */
6806 if (VEC_empty(breakpoint_p
, found
))
6809 error (_("No breakpoint at %s."), arg
);
6811 error (_("No breakpoint at this line."));
6814 if (VEC_length(breakpoint_p
, found
) > 1)
6815 from_tty
= 1; /* Always report if deleted more than one */
6818 if (VEC_length(breakpoint_p
, found
) == 1)
6819 printf_unfiltered (_("Deleted breakpoint "));
6821 printf_unfiltered (_("Deleted breakpoints "));
6823 breakpoints_changed ();
6825 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6828 printf_unfiltered ("%d ", b
->number
);
6829 delete_breakpoint (b
);
6832 putchar_unfiltered ('\n');
6835 /* Delete breakpoint in BS if they are `delete' breakpoints and
6836 all breakpoints that are marked for deletion, whether hit or not.
6837 This is called after any breakpoint is hit, or after errors. */
6840 breakpoint_auto_delete (bpstat bs
)
6842 struct breakpoint
*b
, *temp
;
6844 for (; bs
; bs
= bs
->next
)
6845 if (bs
->breakpoint_at
6846 && bs
->breakpoint_at
->owner
6847 && bs
->breakpoint_at
->owner
->disposition
== disp_del
6849 delete_breakpoint (bs
->breakpoint_at
->owner
);
6851 ALL_BREAKPOINTS_SAFE (b
, temp
)
6853 if (b
->disposition
== disp_del_at_next_stop
)
6854 delete_breakpoint (b
);
6858 /* A cleanup function which destroys a vector. */
6861 do_vec_free (void *p
)
6863 VEC(bp_location_p
) **vec
= p
;
6865 VEC_free (bp_location_p
, *vec
);
6868 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
6869 into the inferior, only remove already-inserted locations that no
6870 longer should be inserted. Functions that delete a breakpoint or
6871 breakpoints should pass false, so that deleting a breakpoint
6872 doesn't have the side effect of inserting the locations of other
6873 breakpoints that are marked not-inserted, but should_be_inserted
6874 returns true on them.
6876 This behaviour is useful is situations close to tear-down -- e.g.,
6877 after an exec, while the target still has execution, but breakpoint
6878 shadows of the previous executable image should *NOT* be restored
6879 to the new image; or before detaching, where the target still has
6880 execution and wants to delete breakpoints from GDB's lists, and all
6881 breakpoints had already been removed from the inferior. */
6884 update_global_location_list (int should_insert
)
6886 struct breakpoint
*b
;
6887 struct bp_location
**next
= &bp_location_chain
;
6888 struct bp_location
*loc
;
6889 struct bp_location
*loc2
;
6890 VEC(bp_location_p
) *old_locations
= NULL
;
6893 struct cleanup
*cleanups
;
6895 cleanups
= make_cleanup (do_vec_free
, &old_locations
);
6896 /* Store old locations for future reference. */
6897 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
6898 VEC_safe_push (bp_location_p
, old_locations
, loc
);
6900 bp_location_chain
= NULL
;
6903 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
6906 next
= &(loc
->global_next
);
6911 /* Identify bp_location instances that are no longer present in the new
6912 list, and therefore should be freed. Note that it's not necessary that
6913 those locations should be removed from inferior -- if there's another
6914 location at the same address (previously marked as duplicate),
6915 we don't need to remove/insert the location. */
6916 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
6918 /* Tells if 'loc' is found amoung the new locations. If not, we
6920 int found_object
= 0;
6921 /* Tells if the location should remain inserted in the target. */
6922 int keep_in_target
= 0;
6924 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
6931 /* If this location is no longer present, and inserted, look if there's
6932 maybe a new location at the same address. If so, mark that one
6933 inserted, and don't remove this one. This is needed so that we
6934 don't have a time window where a breakpoint at certain location is not
6939 /* If the location is inserted now, we might have to remove it. */
6941 if (found_object
&& should_be_inserted (loc
))
6943 /* The location is still present in the location list, and still
6944 should be inserted. Don't do anything. */
6949 /* The location is either no longer present, or got disabled.
6950 See if there's another location at the same address, in which
6951 case we don't need to remove this one from the target. */
6952 if (breakpoint_address_is_meaningful (loc
->owner
))
6953 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
6955 /* For the sake of should_insert_location. The
6956 call to check_duplicates will fix up this later. */
6957 loc2
->duplicate
= 0;
6958 if (should_be_inserted (loc2
)
6959 && loc2
!= loc
&& loc2
->address
== loc
->address
)
6962 loc2
->target_info
= loc
->target_info
;
6969 if (!keep_in_target
)
6971 if (remove_breakpoint (loc
, mark_uninserted
))
6973 /* This is just about all we can do. We could keep this
6974 location on the global list, and try to remove it next
6975 time, but there's no particular reason why we will
6978 Note that at this point, loc->owner is still valid,
6979 as delete_breakpoint frees the breakpoint only
6980 after calling us. */
6981 printf_filtered (_("warning: Error removing breakpoint %d\n"),
6982 loc
->owner
->number
);
6990 if (removed
&& non_stop
)
6992 /* This location was removed from the targets. In non-stop mode,
6993 a race condition is possible where we've removed a breakpoint,
6994 but stop events for that breakpoint are already queued and will
6995 arrive later. To suppress spurious SIGTRAPs reported to user,
6996 we keep this breakpoint location for a bit, and will retire it
6997 after we see 3 * thread_count events.
6998 The theory here is that reporting of events should,
6999 "on the average", be fair, so after that many event we'll see
7000 events from all threads that have anything of interest, and no
7001 longer need to keep this breakpoint. This is just a
7002 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7003 which is usability issue, but not a correctness problem. */
7004 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7007 VEC_safe_push (bp_location_p
, moribund_locations
, loc
);
7010 free_bp_location (loc
);
7016 check_duplicates (b
);
7019 if (breakpoints_always_inserted_mode () && should_insert
7020 && (target_has_execution
7021 || (gdbarch_has_global_solist (target_gdbarch
)
7022 && target_supports_multi_process ())))
7023 insert_breakpoint_locations ();
7025 do_cleanups (cleanups
);
7029 breakpoint_retire_moribund (void)
7031 struct bp_location
*loc
;
7034 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7035 if (--(loc
->events_till_retirement
) == 0)
7037 free_bp_location (loc
);
7038 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7044 update_global_location_list_nothrow (int inserting
)
7046 struct gdb_exception e
;
7047 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7048 update_global_location_list (inserting
);
7051 /* Clear BPT from a BPS. */
7053 bpstat_remove_breakpoint (bpstat bps
, struct breakpoint
*bpt
)
7056 for (bs
= bps
; bs
; bs
= bs
->next
)
7057 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7059 bs
->breakpoint_at
= NULL
;
7061 /* bs->commands will be freed later. */
7065 /* Callback for iterate_over_threads. */
7067 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
7069 struct breakpoint
*bpt
= data
;
7070 bpstat_remove_breakpoint (th
->stop_bpstat
, bpt
);
7074 /* Delete a breakpoint and clean up all traces of it in the data
7078 delete_breakpoint (struct breakpoint
*bpt
)
7080 struct breakpoint
*b
;
7081 struct bp_location
*loc
, *next
;
7083 gdb_assert (bpt
!= NULL
);
7085 /* Has this bp already been deleted? This can happen because multiple
7086 lists can hold pointers to bp's. bpstat lists are especial culprits.
7088 One example of this happening is a watchpoint's scope bp. When the
7089 scope bp triggers, we notice that the watchpoint is out of scope, and
7090 delete it. We also delete its scope bp. But the scope bp is marked
7091 "auto-deleting", and is already on a bpstat. That bpstat is then
7092 checked for auto-deleting bp's, which are deleted.
7094 A real solution to this problem might involve reference counts in bp's,
7095 and/or giving them pointers back to their referencing bpstat's, and
7096 teaching delete_breakpoint to only free a bp's storage when no more
7097 references were extent. A cheaper bandaid was chosen. */
7098 if (bpt
->type
== bp_none
)
7101 observer_notify_breakpoint_deleted (bpt
->number
);
7103 if (breakpoint_chain
== bpt
)
7104 breakpoint_chain
= bpt
->next
;
7109 b
->next
= bpt
->next
;
7113 free_command_lines (&bpt
->commands
);
7114 if (bpt
->cond_string
!= NULL
)
7115 xfree (bpt
->cond_string
);
7116 if (bpt
->addr_string
!= NULL
)
7117 xfree (bpt
->addr_string
);
7118 if (bpt
->exp
!= NULL
)
7120 if (bpt
->exp_string
!= NULL
)
7121 xfree (bpt
->exp_string
);
7122 if (bpt
->val
!= NULL
)
7123 value_free (bpt
->val
);
7124 if (bpt
->source_file
!= NULL
)
7125 xfree (bpt
->source_file
);
7126 if (bpt
->exec_pathname
!= NULL
)
7127 xfree (bpt
->exec_pathname
);
7129 /* Be sure no bpstat's are pointing at it after it's been freed. */
7130 /* FIXME, how can we find all bpstat's?
7131 We just check stop_bpstat for now. Note that we cannot just
7132 remove bpstats pointing at bpt from the stop_bpstat list
7133 entirely, as breakpoint commands are associated with the bpstat;
7134 if we remove it here, then the later call to
7135 bpstat_do_actions (&stop_bpstat);
7136 in event-top.c won't do anything, and temporary breakpoints
7137 with commands won't work. */
7139 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
7141 /* Now that breakpoint is removed from breakpoint
7142 list, update the global location list. This
7143 will remove locations that used to belong to
7144 this breakpoint. Do this before freeing
7145 the breakpoint itself, since remove_breakpoint
7146 looks at location's owner. It might be better
7147 design to have location completely self-contained,
7148 but it's not the case now. */
7149 update_global_location_list (0);
7152 /* On the chance that someone will soon try again to delete this same
7153 bp, we mark it as deleted before freeing its storage. */
7154 bpt
->type
= bp_none
;
7160 do_delete_breakpoint_cleanup (void *b
)
7162 delete_breakpoint (b
);
7166 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7168 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7172 delete_command (char *arg
, int from_tty
)
7174 struct breakpoint
*b
, *temp
;
7180 int breaks_to_delete
= 0;
7182 /* Delete all breakpoints if no argument.
7183 Do not delete internal or call-dummy breakpoints, these
7184 have to be deleted with an explicit breakpoint number argument. */
7187 if (b
->type
!= bp_call_dummy
&&
7188 b
->type
!= bp_shlib_event
&&
7189 b
->type
!= bp_thread_event
&&
7190 b
->type
!= bp_overlay_event
&&
7193 breaks_to_delete
= 1;
7198 /* Ask user only if there are some breakpoints to delete. */
7200 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7202 ALL_BREAKPOINTS_SAFE (b
, temp
)
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
&&
7209 delete_breakpoint (b
);
7214 map_breakpoint_numbers (arg
, delete_breakpoint
);
7218 all_locations_are_pending (struct bp_location
*loc
)
7220 for (; loc
; loc
= loc
->next
)
7221 if (!loc
->shlib_disabled
)
7226 /* Subroutine of update_breakpoint_locations to simplify it.
7227 Return non-zero if multiple fns in list LOC have the same name.
7228 Null names are ignored. */
7231 ambiguous_names_p (struct bp_location
*loc
)
7233 struct bp_location
*l
;
7234 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7235 (int (*) (const void *, const void *)) streq
,
7236 NULL
, xcalloc
, xfree
);
7238 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7241 const char *name
= l
->function_name
;
7243 /* Allow for some names to be NULL, ignore them. */
7247 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7249 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7264 update_breakpoint_locations (struct breakpoint
*b
,
7265 struct symtabs_and_lines sals
)
7269 struct bp_location
*existing_locations
= b
->loc
;
7271 /* If there's no new locations, and all existing locations
7272 are pending, don't do anything. This optimizes
7273 the common case where all locations are in the same
7274 shared library, that was unloaded. We'd like to
7275 retain the location, so that when the library
7276 is loaded again, we don't loose the enabled/disabled
7277 status of the individual locations. */
7278 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7283 for (i
= 0; i
< sals
.nelts
; ++i
)
7285 struct bp_location
*new_loc
=
7286 add_location_to_breakpoint (b
, &(sals
.sals
[i
]));
7288 /* Reparse conditions, they might contain references to the
7290 if (b
->cond_string
!= NULL
)
7292 struct gdb_exception e
;
7295 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7297 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7302 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7303 b
->number
, e
.message
);
7304 new_loc
->enabled
= 0;
7308 if (b
->source_file
!= NULL
)
7309 xfree (b
->source_file
);
7310 if (sals
.sals
[i
].symtab
== NULL
)
7311 b
->source_file
= NULL
;
7314 savestring (sals
.sals
[i
].symtab
->filename
,
7315 strlen (sals
.sals
[i
].symtab
->filename
));
7317 if (b
->line_number
== 0)
7318 b
->line_number
= sals
.sals
[i
].line
;
7321 /* Update locations of permanent breakpoints. */
7322 if (b
->enable_state
== bp_permanent
)
7323 make_breakpoint_permanent (b
);
7325 /* If possible, carry over 'disable' status from existing breakpoints. */
7327 struct bp_location
*e
= existing_locations
;
7328 /* If there are multiple breakpoints with the same function name,
7329 e.g. for inline functions, comparing function names won't work.
7330 Instead compare pc addresses; this is just a heuristic as things
7331 may have moved, but in practice it gives the correct answer
7332 often enough until a better solution is found. */
7333 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7335 for (; e
; e
= e
->next
)
7337 if (!e
->enabled
&& e
->function_name
)
7339 struct bp_location
*l
= b
->loc
;
7340 if (have_ambiguous_names
)
7342 for (; l
; l
= l
->next
)
7343 if (e
->address
== l
->address
)
7351 for (; l
; l
= l
->next
)
7352 if (l
->function_name
7353 && strcmp (e
->function_name
, l
->function_name
) == 0)
7363 update_global_location_list (1);
7367 /* Reset a breakpoint given it's struct breakpoint * BINT.
7368 The value we return ends up being the return value from catch_errors.
7369 Unused in this case. */
7372 breakpoint_re_set_one (void *bint
)
7374 /* get past catch_errs */
7375 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7379 int *not_found_ptr
= ¬_found
;
7380 struct symtabs_and_lines sals
= {};
7381 struct symtabs_and_lines expanded
;
7383 enum enable_state save_enable
;
7384 struct gdb_exception e
;
7385 struct cleanup
*cleanups
;
7390 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7394 case bp_hardware_breakpoint
:
7395 if (b
->addr_string
== NULL
)
7397 /* Anything without a string can't be re-set. */
7398 delete_breakpoint (b
);
7402 set_language (b
->language
);
7403 input_radix
= b
->input_radix
;
7405 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7407 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7412 int not_found_and_ok
= 0;
7413 /* For pending breakpoints, it's expected that parsing
7414 will fail until the right shared library is loaded.
7415 User has already told to create pending breakpoints and
7416 don't need extra messages. If breakpoint is in bp_shlib_disabled
7417 state, then user already saw the message about that breakpoint
7418 being disabled, and don't want to see more errors. */
7420 && (b
->condition_not_parsed
7421 || (b
->loc
&& b
->loc
->shlib_disabled
)
7422 || b
->enable_state
== bp_disabled
))
7423 not_found_and_ok
= 1;
7425 if (!not_found_and_ok
)
7427 /* We surely don't want to warn about the same breakpoint
7428 10 times. One solution, implemented here, is disable
7429 the breakpoint on error. Another solution would be to
7430 have separate 'warning emitted' flag. Since this
7431 happens only when a binary has changed, I don't know
7432 which approach is better. */
7433 b
->enable_state
= bp_disabled
;
7434 throw_exception (e
);
7441 gdb_assert (sals
.nelts
== 1);
7442 resolve_sal_pc (&sals
.sals
[0]);
7443 if (b
->condition_not_parsed
&& s
&& s
[0])
7445 char *cond_string
= 0;
7447 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7448 &cond_string
, &thread
);
7450 b
->cond_string
= cond_string
;
7452 b
->condition_not_parsed
= 0;
7454 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7455 cleanups
= make_cleanup (xfree
, sals
.sals
);
7456 update_breakpoint_locations (b
, expanded
);
7457 do_cleanups (cleanups
);
7461 case bp_hardware_watchpoint
:
7462 case bp_read_watchpoint
:
7463 case bp_access_watchpoint
:
7464 /* Watchpoint can be either on expression using entirely global variables,
7465 or it can be on local variables.
7467 Watchpoints of the first kind are never auto-deleted, and even persist
7468 across program restarts. Since they can use variables from shared
7469 libraries, we need to reparse expression as libraries are loaded
7472 Watchpoints on local variables can also change meaning as result
7473 of solib event. For example, if a watchpoint uses both a local and
7474 a global variables in expression, it's a local watchpoint, but
7475 unloading of a shared library will make the expression invalid.
7476 This is not a very common use case, but we still re-evaluate
7477 expression, to avoid surprises to the user.
7479 Note that for local watchpoints, we re-evaluate it only if
7480 watchpoints frame id is still valid. If it's not, it means
7481 the watchpoint is out of scope and will be deleted soon. In fact,
7482 I'm not sure we'll ever be called in this case.
7484 If a local watchpoint's frame id is still valid, then
7485 b->exp_valid_block is likewise valid, and we can safely use it.
7487 Don't do anything about disabled watchpoints, since they will
7488 be reevaluated again when enabled. */
7489 update_watchpoint (b
, 1 /* reparse */);
7491 /* We needn't really do anything to reset these, since the mask
7492 that requests them is unaffected by e.g., new libraries being
7498 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7500 /* Delete overlay event breakpoints; they will be reset later by
7501 breakpoint_re_set. */
7502 case bp_overlay_event
:
7503 delete_breakpoint (b
);
7506 /* This breakpoint is special, it's set up when the inferior
7507 starts and we really don't want to touch it. */
7508 case bp_shlib_event
:
7510 /* Like bp_shlib_event, this breakpoint type is special.
7511 Once it is set up, we do not want to touch it. */
7512 case bp_thread_event
:
7514 /* Keep temporary breakpoints, which can be encountered when we step
7515 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7516 Otherwise these should have been blown away via the cleanup chain
7517 or by breakpoint_init_inferior when we rerun the executable. */
7520 case bp_watchpoint_scope
:
7522 case bp_step_resume
:
7524 case bp_longjmp_resume
:
7531 /* Re-set all breakpoints after symbols have been re-loaded. */
7533 breakpoint_re_set (void)
7535 struct breakpoint
*b
, *temp
;
7536 enum language save_language
;
7537 int save_input_radix
;
7539 save_language
= current_language
->la_language
;
7540 save_input_radix
= input_radix
;
7541 ALL_BREAKPOINTS_SAFE (b
, temp
)
7543 /* Format possible error msg */
7544 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7546 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7547 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7548 do_cleanups (cleanups
);
7550 set_language (save_language
);
7551 input_radix
= save_input_radix
;
7553 create_overlay_event_breakpoint ("_ovly_debug_event");
7556 /* Reset the thread number of this breakpoint:
7558 - If the breakpoint is for all threads, leave it as-is.
7559 - Else, reset it to the current thread for inferior_ptid. */
7561 breakpoint_re_set_thread (struct breakpoint
*b
)
7563 if (b
->thread
!= -1)
7565 if (in_thread_list (inferior_ptid
))
7566 b
->thread
= pid_to_thread_id (inferior_ptid
);
7570 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7571 If from_tty is nonzero, it prints a message to that effect,
7572 which ends with a period (no newline). */
7575 set_ignore_count (int bptnum
, int count
, int from_tty
)
7577 struct breakpoint
*b
;
7583 if (b
->number
== bptnum
)
7585 b
->ignore_count
= count
;
7589 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7591 else if (count
== 1)
7592 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7595 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7598 breakpoints_changed ();
7599 observer_notify_breakpoint_modified (b
->number
);
7603 error (_("No breakpoint number %d."), bptnum
);
7607 make_breakpoint_silent (struct breakpoint
*b
)
7609 /* Silence the breakpoint. */
7613 /* Command to set ignore-count of breakpoint N to COUNT. */
7616 ignore_command (char *args
, int from_tty
)
7622 error_no_arg (_("a breakpoint number"));
7624 num
= get_number (&p
);
7626 error (_("bad breakpoint number: '%s'"), args
);
7628 error (_("Second argument (specified ignore-count) is missing."));
7630 set_ignore_count (num
,
7631 longest_to_int (value_as_long (parse_and_eval (p
))),
7634 printf_filtered ("\n");
7637 /* Call FUNCTION on each of the breakpoints
7638 whose numbers are given in ARGS. */
7641 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7646 struct breakpoint
*b
, *tmp
;
7650 error_no_arg (_("one or more breakpoint numbers"));
7657 num
= get_number_or_range (&p1
);
7660 warning (_("bad breakpoint number at or near '%s'"), p
);
7664 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7665 if (b
->number
== num
)
7667 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7670 if (related_breakpoint
)
7671 function (related_breakpoint
);
7675 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7681 static struct bp_location
*
7682 find_location_by_number (char *number
)
7684 char *dot
= strchr (number
, '.');
7688 struct breakpoint
*b
;
7689 struct bp_location
*loc
;
7694 bp_num
= get_number_or_range (&p1
);
7696 error (_("Bad breakpoint number '%s'"), number
);
7699 if (b
->number
== bp_num
)
7704 if (!b
|| b
->number
!= bp_num
)
7705 error (_("Bad breakpoint number '%s'"), number
);
7708 loc_num
= get_number_or_range (&p1
);
7710 error (_("Bad breakpoint location number '%s'"), number
);
7714 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7717 error (_("Bad breakpoint location number '%s'"), dot
+1);
7723 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7724 If from_tty is nonzero, it prints a message to that effect,
7725 which ends with a period (no newline). */
7728 disable_breakpoint (struct breakpoint
*bpt
)
7730 /* Never disable a watchpoint scope breakpoint; we want to
7731 hit them when we leave scope so we can delete both the
7732 watchpoint and its scope breakpoint at that time. */
7733 if (bpt
->type
== bp_watchpoint_scope
)
7736 /* You can't disable permanent breakpoints. */
7737 if (bpt
->enable_state
== bp_permanent
)
7740 bpt
->enable_state
= bp_disabled
;
7742 update_global_location_list (0);
7744 observer_notify_breakpoint_modified (bpt
->number
);
7748 disable_command (char *args
, int from_tty
)
7750 struct breakpoint
*bpt
;
7752 ALL_BREAKPOINTS (bpt
)
7756 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7761 case bp_hardware_breakpoint
:
7763 case bp_hardware_watchpoint
:
7764 case bp_read_watchpoint
:
7765 case bp_access_watchpoint
:
7766 disable_breakpoint (bpt
);
7770 else if (strchr (args
, '.'))
7772 struct bp_location
*loc
= find_location_by_number (args
);
7775 update_global_location_list (0);
7778 map_breakpoint_numbers (args
, disable_breakpoint
);
7782 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7784 int target_resources_ok
, other_type_used
;
7787 if (bpt
->type
== bp_hardware_breakpoint
)
7790 i
= hw_breakpoint_used_count ();
7791 target_resources_ok
=
7792 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7794 if (target_resources_ok
== 0)
7795 error (_("No hardware breakpoint support in the target."));
7796 else if (target_resources_ok
< 0)
7797 error (_("Hardware breakpoints used exceeds limit."));
7800 if (bpt
->type
== bp_watchpoint
||
7801 bpt
->type
== bp_hardware_watchpoint
||
7802 bpt
->type
== bp_read_watchpoint
||
7803 bpt
->type
== bp_access_watchpoint
)
7805 struct gdb_exception e
;
7807 TRY_CATCH (e
, RETURN_MASK_ALL
)
7809 update_watchpoint (bpt
, 1 /* reparse */);
7813 exception_fprintf (gdb_stderr
, e
, _("Cannot enable watchpoint %d: "),
7819 if (bpt
->enable_state
!= bp_permanent
)
7820 bpt
->enable_state
= bp_enabled
;
7821 bpt
->disposition
= disposition
;
7822 update_global_location_list (1);
7823 breakpoints_changed ();
7825 observer_notify_breakpoint_modified (bpt
->number
);
7830 enable_breakpoint (struct breakpoint
*bpt
)
7832 do_enable_breakpoint (bpt
, bpt
->disposition
);
7835 /* The enable command enables the specified breakpoints (or all defined
7836 breakpoints) so they once again become (or continue to be) effective
7837 in stopping the inferior. */
7840 enable_command (char *args
, int from_tty
)
7842 struct breakpoint
*bpt
;
7844 ALL_BREAKPOINTS (bpt
)
7848 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7853 case bp_hardware_breakpoint
:
7855 case bp_hardware_watchpoint
:
7856 case bp_read_watchpoint
:
7857 case bp_access_watchpoint
:
7858 enable_breakpoint (bpt
);
7862 else if (strchr (args
, '.'))
7864 struct bp_location
*loc
= find_location_by_number (args
);
7867 update_global_location_list (1);
7870 map_breakpoint_numbers (args
, enable_breakpoint
);
7874 enable_once_breakpoint (struct breakpoint
*bpt
)
7876 do_enable_breakpoint (bpt
, disp_disable
);
7880 enable_once_command (char *args
, int from_tty
)
7882 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7886 enable_delete_breakpoint (struct breakpoint
*bpt
)
7888 do_enable_breakpoint (bpt
, disp_del
);
7892 enable_delete_command (char *args
, int from_tty
)
7894 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7898 set_breakpoint_cmd (char *args
, int from_tty
)
7903 show_breakpoint_cmd (char *args
, int from_tty
)
7907 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7909 struct symtabs_and_lines
7910 decode_line_spec_1 (char *string
, int funfirstline
)
7912 struct symtabs_and_lines sals
;
7914 error (_("Empty line specification."));
7915 if (default_breakpoint_valid
)
7916 sals
= decode_line_1 (&string
, funfirstline
,
7917 default_breakpoint_symtab
,
7918 default_breakpoint_line
,
7919 (char ***) NULL
, NULL
);
7921 sals
= decode_line_1 (&string
, funfirstline
,
7922 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7924 error (_("Junk at end of line specification: %s"), string
);
7928 /* Create and insert a raw software breakpoint at PC. Return an
7929 identifier, which should be used to remove the breakpoint later.
7930 In general, places which call this should be using something on the
7931 breakpoint chain instead; this function should be eliminated
7935 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
7937 struct bp_target_info
*bp_tgt
;
7939 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
7940 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
7942 bp_tgt
->placed_address
= pc
;
7943 if (target_insert_breakpoint (bp_tgt
) != 0)
7945 /* Could not insert the breakpoint. */
7953 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
7956 deprecated_remove_raw_breakpoint (void *bp
)
7958 struct bp_target_info
*bp_tgt
= bp
;
7961 ret
= target_remove_breakpoint (bp_tgt
);
7967 /* One (or perhaps two) breakpoints used for software single stepping. */
7969 static void *single_step_breakpoints
[2];
7971 /* Create and insert a breakpoint for software single step. */
7974 insert_single_step_breakpoint (CORE_ADDR next_pc
)
7978 if (single_step_breakpoints
[0] == NULL
)
7979 bpt_p
= &single_step_breakpoints
[0];
7982 gdb_assert (single_step_breakpoints
[1] == NULL
);
7983 bpt_p
= &single_step_breakpoints
[1];
7986 /* NOTE drow/2006-04-11: A future improvement to this function would be
7987 to only create the breakpoints once, and actually put them on the
7988 breakpoint chain. That would let us use set_raw_breakpoint. We could
7989 adjust the addresses each time they were needed. Doing this requires
7990 corresponding changes elsewhere where single step breakpoints are
7991 handled, however. So, for now, we use this. */
7993 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
7995 error (_("Could not insert single-step breakpoint at 0x%s"),
7996 paddr_nz (next_pc
));
7999 /* Remove and delete any breakpoints used for software single step. */
8002 remove_single_step_breakpoints (void)
8004 gdb_assert (single_step_breakpoints
[0] != NULL
);
8006 /* See insert_single_step_breakpoint for more about this deprecated
8008 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8009 single_step_breakpoints
[0] = NULL
;
8011 if (single_step_breakpoints
[1] != NULL
)
8013 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8014 single_step_breakpoints
[1] = NULL
;
8018 /* Check whether a software single-step breakpoint is inserted at PC. */
8021 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8025 for (i
= 0; i
< 2; i
++)
8027 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8028 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8036 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8037 It is defined as a macro to prevent duplication.
8038 COMMAND should be a string constant containing the name of the command. */
8039 #define BREAK_ARGS_HELP(command) \
8040 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8041 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8042 If a line number is specified, break at start of code for that line.\n\
8043 If a function is specified, break at start of code for that function.\n\
8044 If an address is specified, break at that exact address.\n\
8045 With no LOCATION, uses current execution address of selected stack frame.\n\
8046 This is useful for breaking on return to a stack frame.\n\
8048 THREADNUM is the number from \"info threads\".\n\
8049 CONDITION is a boolean expression.\n\
8051 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8053 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8055 /* List of subcommands for "catch". */
8056 static struct cmd_list_element
*catch_cmdlist
;
8058 /* List of subcommands for "tcatch". */
8059 static struct cmd_list_element
*tcatch_cmdlist
;
8061 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
8062 lists, and pass some additional user data to the command function. */
8064 add_catch_command (char *name
, char *docstring
,
8065 void (*sfunc
) (char *args
, int from_tty
,
8066 struct cmd_list_element
*command
),
8067 void *user_data_catch
,
8068 void *user_data_tcatch
)
8070 struct cmd_list_element
*command
;
8072 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8074 set_cmd_sfunc (command
, sfunc
);
8075 set_cmd_context (command
, user_data_catch
);
8077 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8079 set_cmd_sfunc (command
, sfunc
);
8080 set_cmd_context (command
, user_data_tcatch
);
8084 _initialize_breakpoint (void)
8086 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8087 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8088 struct cmd_list_element
*c
;
8090 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8092 breakpoint_chain
= 0;
8093 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8094 before a breakpoint is set. */
8095 breakpoint_count
= 0;
8097 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8098 Set ignore-count of breakpoint number N to COUNT.\n\
8099 Usage is `ignore N COUNT'."));
8101 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8103 add_com ("commands", class_breakpoint
, commands_command
, _("\
8104 Set commands to be executed when a breakpoint is hit.\n\
8105 Give breakpoint number as argument after \"commands\".\n\
8106 With no argument, the targeted breakpoint is the last one set.\n\
8107 The commands themselves follow starting on the next line.\n\
8108 Type a line containing \"end\" to indicate the end of them.\n\
8109 Give \"silent\" as the first line to make the breakpoint silent;\n\
8110 then no output is printed when it is hit, except what the commands print."));
8112 add_com ("condition", class_breakpoint
, condition_command
, _("\
8113 Specify breakpoint number N to break only if COND is true.\n\
8114 Usage is `condition N COND', where N is an integer and COND is an\n\
8115 expression to be evaluated whenever breakpoint N is reached."));
8117 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8118 Set a temporary breakpoint.\n\
8119 Like \"break\" except the breakpoint is only temporary,\n\
8120 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8121 by using \"enable delete\" on the breakpoint number.\n\
8123 BREAK_ARGS_HELP ("tbreak")));
8124 set_cmd_completer (c
, location_completer
);
8126 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8127 Set a hardware assisted breakpoint.\n\
8128 Like \"break\" except the breakpoint requires hardware support,\n\
8129 some target hardware may not have this support.\n\
8131 BREAK_ARGS_HELP ("hbreak")));
8132 set_cmd_completer (c
, location_completer
);
8134 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8135 Set a temporary hardware assisted breakpoint.\n\
8136 Like \"hbreak\" except the breakpoint is only temporary,\n\
8137 so it will be deleted when hit.\n\
8139 BREAK_ARGS_HELP ("thbreak")));
8140 set_cmd_completer (c
, location_completer
);
8142 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8143 Enable some breakpoints.\n\
8144 Give breakpoint numbers (separated by spaces) as arguments.\n\
8145 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8146 This is used to cancel the effect of the \"disable\" command.\n\
8147 With a subcommand you can enable temporarily."),
8148 &enablelist
, "enable ", 1, &cmdlist
);
8150 add_com ("ab", class_breakpoint
, enable_command
, _("\
8151 Enable some breakpoints.\n\
8152 Give breakpoint numbers (separated by spaces) as arguments.\n\
8153 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8154 This is used to cancel the effect of the \"disable\" command.\n\
8155 With a subcommand you can enable temporarily."));
8157 add_com_alias ("en", "enable", class_breakpoint
, 1);
8159 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8160 Enable some breakpoints.\n\
8161 Give breakpoint numbers (separated by spaces) as arguments.\n\
8162 This is used to cancel the effect of the \"disable\" command.\n\
8163 May be abbreviated to simply \"enable\".\n"),
8164 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8166 add_cmd ("once", no_class
, enable_once_command
, _("\
8167 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8168 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8171 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8172 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8173 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8176 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8177 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8178 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8181 add_cmd ("once", no_class
, enable_once_command
, _("\
8182 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8183 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8186 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8187 Disable some breakpoints.\n\
8188 Arguments are breakpoint numbers with spaces in between.\n\
8189 To disable all breakpoints, give no argument.\n\
8190 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8191 &disablelist
, "disable ", 1, &cmdlist
);
8192 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8193 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8195 add_com ("sb", class_breakpoint
, disable_command
, _("\
8196 Disable some breakpoints.\n\
8197 Arguments are breakpoint numbers with spaces in between.\n\
8198 To disable all breakpoints, give no argument.\n\
8199 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8201 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8202 Disable some breakpoints.\n\
8203 Arguments are breakpoint numbers with spaces in between.\n\
8204 To disable all breakpoints, give no argument.\n\
8205 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8206 This command may be abbreviated \"disable\"."),
8209 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8210 Delete some breakpoints or auto-display expressions.\n\
8211 Arguments are breakpoint numbers with spaces in between.\n\
8212 To delete all breakpoints, give no argument.\n\
8214 Also a prefix command for deletion of other GDB objects.\n\
8215 The \"unset\" command is also an alias for \"delete\"."),
8216 &deletelist
, "delete ", 1, &cmdlist
);
8217 add_com_alias ("d", "delete", class_breakpoint
, 1);
8218 add_com_alias ("del", "delete", class_breakpoint
, 1);
8220 add_com ("db", class_breakpoint
, delete_command
, _("\
8221 Delete some breakpoints.\n\
8222 Arguments are breakpoint numbers with spaces in between.\n\
8223 To delete all breakpoints, give no argument.\n"));
8225 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8226 Delete some breakpoints or auto-display expressions.\n\
8227 Arguments are breakpoint numbers with spaces in between.\n\
8228 To delete all breakpoints, give no argument.\n\
8229 This command may be abbreviated \"delete\"."),
8232 add_com ("clear", class_breakpoint
, clear_command
, _("\
8233 Clear breakpoint at specified line or function.\n\
8234 Argument may be line number, function name, or \"*\" and an address.\n\
8235 If line number is specified, all breakpoints in that line are cleared.\n\
8236 If function is specified, breakpoints at beginning of function are cleared.\n\
8237 If an address is specified, breakpoints at that address are cleared.\n\
8239 With no argument, clears all breakpoints in the line that the selected frame\n\
8242 See also the \"delete\" command which clears breakpoints by number."));
8244 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8245 Set breakpoint at specified line or function.\n"
8246 BREAK_ARGS_HELP ("break")));
8247 set_cmd_completer (c
, location_completer
);
8249 add_com_alias ("b", "break", class_run
, 1);
8250 add_com_alias ("br", "break", class_run
, 1);
8251 add_com_alias ("bre", "break", class_run
, 1);
8252 add_com_alias ("brea", "break", class_run
, 1);
8256 add_com_alias ("ba", "break", class_breakpoint
, 1);
8257 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8262 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8263 Break in function/address or break at a line in the current file."),
8264 &stoplist
, "stop ", 1, &cmdlist
);
8265 add_cmd ("in", class_breakpoint
, stopin_command
,
8266 _("Break in function or address."), &stoplist
);
8267 add_cmd ("at", class_breakpoint
, stopat_command
,
8268 _("Break at a line in the current file."), &stoplist
);
8269 add_com ("status", class_info
, breakpoints_info
, _("\
8270 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8271 The \"Type\" column indicates one of:\n\
8272 \tbreakpoint - normal breakpoint\n\
8273 \twatchpoint - watchpoint\n\
8274 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8275 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8276 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8277 address and file/line number respectively.\n\
8279 Convenience variable \"$_\" and default examine address for \"x\"\n\
8280 are set to the address of the last breakpoint listed unless the command\n\
8281 is prefixed with \"server \".\n\n\
8282 Convenience variable \"$bpnum\" contains the number of the last\n\
8286 add_info ("breakpoints", breakpoints_info
, _("\
8287 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8288 The \"Type\" column indicates one of:\n\
8289 \tbreakpoint - normal breakpoint\n\
8290 \twatchpoint - watchpoint\n\
8291 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8292 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8293 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8294 address and file/line number respectively.\n\
8296 Convenience variable \"$_\" 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 \"$bpnum\" contains the number of the last\n\
8303 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8304 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8305 The \"Type\" column indicates one of:\n\
8306 \tbreakpoint - normal breakpoint\n\
8307 \twatchpoint - watchpoint\n\
8308 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8309 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8310 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8311 address and file/line number respectively.\n\
8313 Convenience variable \"$_\" 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 \"$bpnum\" contains the number of the last\n\
8319 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8320 Status of all breakpoints, or breakpoint number NUMBER.\n\
8321 The \"Type\" column indicates one of:\n\
8322 \tbreakpoint - normal breakpoint\n\
8323 \twatchpoint - watchpoint\n\
8324 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8325 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8326 \tuntil - internal breakpoint used by the \"until\" command\n\
8327 \tfinish - internal breakpoint used by the \"finish\" command\n\
8328 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8329 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8330 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8331 address and file/line number respectively.\n\
8333 Convenience variable \"$_\" and default examine address for \"x\"\n\
8334 are set to the address of the last breakpoint listed unless the command\n\
8335 is prefixed with \"server \".\n\n\
8336 Convenience variable \"$bpnum\" contains the number of the last\n\
8338 &maintenanceinfolist
);
8340 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
8341 Set catchpoints to catch events."),
8342 &catch_cmdlist
, "catch ",
8343 0/*allow-unknown*/, &cmdlist
);
8345 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
8346 Set temporary catchpoints to catch events."),
8347 &tcatch_cmdlist
, "tcatch ",
8348 0/*allow-unknown*/, &cmdlist
);
8350 /* Add catch and tcatch sub-commands. */
8351 add_catch_command ("catch", _("\
8352 Catch an exception, when caught.\n\
8353 With an argument, catch only exceptions with the given name."),
8354 catch_catch_command
,
8357 add_catch_command ("throw", _("\
8358 Catch an exception, when thrown.\n\
8359 With an argument, catch only exceptions with the given name."),
8360 catch_throw_command
,
8363 add_catch_command ("fork", _("Catch calls to fork."),
8364 catch_fork_command_1
,
8365 (void *) (uintptr_t) catch_fork_permanent
,
8366 (void *) (uintptr_t) catch_fork_temporary
);
8367 add_catch_command ("vfork", _("Catch calls to vfork."),
8368 catch_fork_command_1
,
8369 (void *) (uintptr_t) catch_vfork_permanent
,
8370 (void *) (uintptr_t) catch_vfork_temporary
);
8371 add_catch_command ("exec", _("Catch calls to exec."),
8372 catch_exec_command_1
,
8375 add_catch_command ("exception", _("\
8376 Catch Ada exceptions, when raised.\n\
8377 With an argument, catch only exceptions with the given name."),
8378 catch_ada_exception_command
,
8381 add_catch_command ("assert", _("\
8382 Catch failed Ada assertions, when raised.\n\
8383 With an argument, catch only exceptions with the given name."),
8384 catch_assert_command
,
8388 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8389 Set a watchpoint for an expression.\n\
8390 A watchpoint stops execution of your program whenever the value of\n\
8391 an expression changes."));
8392 set_cmd_completer (c
, expression_completer
);
8394 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8395 Set a read watchpoint for an expression.\n\
8396 A watchpoint stops execution of your program whenever the value of\n\
8397 an expression is read."));
8398 set_cmd_completer (c
, expression_completer
);
8400 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8401 Set a watchpoint for an expression.\n\
8402 A watchpoint stops execution of your program whenever the value of\n\
8403 an expression is either read or written."));
8404 set_cmd_completer (c
, expression_completer
);
8406 add_info ("watchpoints", breakpoints_info
,
8407 _("Synonym for ``info breakpoints''."));
8410 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8411 respond to changes - contrary to the description. */
8412 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8413 &can_use_hw_watchpoints
, _("\
8414 Set debugger's willingness to use watchpoint hardware."), _("\
8415 Show debugger's willingness to use watchpoint hardware."), _("\
8416 If zero, gdb will not use hardware for new watchpoints, even if\n\
8417 such is available. (However, any hardware watchpoints that were\n\
8418 created before setting this to nonzero, will continue to use watchpoint\n\
8421 show_can_use_hw_watchpoints
,
8422 &setlist
, &showlist
);
8424 can_use_hw_watchpoints
= 1;
8426 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8427 Breakpoint specific settings\n\
8428 Configure various breakpoint-specific variables such as\n\
8429 pending breakpoint behavior"),
8430 &breakpoint_set_cmdlist
, "set breakpoint ",
8431 0/*allow-unknown*/, &setlist
);
8432 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8433 Breakpoint specific settings\n\
8434 Configure various breakpoint-specific variables such as\n\
8435 pending breakpoint behavior"),
8436 &breakpoint_show_cmdlist
, "show breakpoint ",
8437 0/*allow-unknown*/, &showlist
);
8439 add_setshow_auto_boolean_cmd ("pending", no_class
,
8440 &pending_break_support
, _("\
8441 Set debugger's behavior regarding pending breakpoints."), _("\
8442 Show debugger's behavior regarding pending breakpoints."), _("\
8443 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8444 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8445 an error. If auto, an unrecognized breakpoint location results in a\n\
8446 user-query to see if a pending breakpoint should be created."),
8448 show_pending_break_support
,
8449 &breakpoint_set_cmdlist
,
8450 &breakpoint_show_cmdlist
);
8452 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8454 add_setshow_boolean_cmd ("auto-hw", no_class
,
8455 &automatic_hardware_breakpoints
, _("\
8456 Set automatic usage of hardware breakpoints."), _("\
8457 Show automatic usage of hardware breakpoints."), _("\
8458 If set, the debugger will automatically use hardware breakpoints for\n\
8459 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8460 a warning will be emitted for such breakpoints."),
8462 show_automatic_hardware_breakpoints
,
8463 &breakpoint_set_cmdlist
,
8464 &breakpoint_show_cmdlist
);
8466 add_setshow_enum_cmd ("always-inserted", class_support
,
8467 always_inserted_enums
, &always_inserted_mode
, _("\
8468 Set mode for inserting breakpoints."), _("\
8469 Show mode for inserting breakpoints."), _("\
8470 When this mode is off, breakpoints are inserted in inferior when it is\n\
8471 resumed, and removed when execution stops. When this mode is on,\n\
8472 breakpoints are inserted immediately and removed only when the user\n\
8473 deletes the breakpoint. When this mode is auto (which is the default),\n\
8474 the behaviour depends on the non-stop setting (see help set non-stop).\n\
8475 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
8476 behaves as if always-inserted mode is on; if gdb is controlling the\n\
8477 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
8479 &show_always_inserted_mode
,
8480 &breakpoint_set_cmdlist
,
8481 &breakpoint_show_cmdlist
);
8483 automatic_hardware_breakpoints
= 1;