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 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"
60 #include "mi/mi-common.h"
62 /* Prototypes for local functions. */
64 static void catch_command_1 (char *, int, int);
66 static void enable_delete_command (char *, int);
68 static void enable_delete_breakpoint (struct breakpoint
*);
70 static void enable_once_command (char *, int);
72 static void enable_once_breakpoint (struct breakpoint
*);
74 static void disable_command (char *, int);
76 static void enable_command (char *, int);
78 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
80 static void ignore_command (char *, int);
82 static int breakpoint_re_set_one (void *);
84 static void clear_command (char *, int);
86 static void catch_command (char *, int);
88 static void watch_command (char *, int);
90 static int can_use_hardware_watchpoint (struct value
*);
92 static void break_command_1 (char *, int, int);
94 static void mention (struct breakpoint
*);
96 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
98 static void check_duplicates (struct breakpoint
*);
100 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
102 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
105 static void describe_other_breakpoints (CORE_ADDR
, asection
*, int);
107 static void breakpoints_info (char *, int);
109 static void breakpoint_1 (int, int);
111 static bpstat
bpstat_alloc (const struct bp_location
*, bpstat
);
113 static int breakpoint_cond_eval (void *);
115 static void cleanup_executing_breakpoints (void *);
117 static void commands_command (char *, int);
119 static void condition_command (char *, int);
121 static int get_number_trailer (char **, int);
123 void set_breakpoint_count (int);
132 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
134 static enum print_stop_action
print_it_typical (bpstat
);
136 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
138 static int watchpoint_check (void *);
140 static void maintenance_info_breakpoints (char *, int);
142 static void create_overlay_event_breakpoint (char *);
144 static int hw_breakpoint_used_count (void);
146 static int hw_watchpoint_used_count (enum bptype
, int *);
148 static void hbreak_command (char *, int);
150 static void thbreak_command (char *, int);
152 static void watch_command_1 (char *, int, int);
154 static void rwatch_command (char *, int);
156 static void awatch_command (char *, int);
158 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
160 static void create_fork_vfork_event_catchpoint (int tempflag
,
162 enum bptype bp_kind
);
164 static void stop_command (char *arg
, int from_tty
);
166 static void stopin_command (char *arg
, int from_tty
);
168 static void stopat_command (char *arg
, int from_tty
);
170 static char *ep_find_event_name_end (char *arg
);
172 static char *ep_parse_optional_if_clause (char **arg
);
174 static char *ep_parse_optional_filename (char **arg
);
176 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
177 char *arg
, int tempflag
, int from_tty
);
179 static void tcatch_command (char *arg
, int from_tty
);
181 static void ep_skip_leading_whitespace (char **s
);
183 static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc
);
185 static void free_bp_location (struct bp_location
*loc
);
187 static struct bp_location
*
188 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
);
190 static void update_global_location_list (int);
192 static void update_global_location_list_nothrow (int);
194 static int is_hardware_watchpoint (struct breakpoint
*bpt
);
196 static void insert_breakpoint_locations (void);
199 bpdisp_text (enum bpdisp disp
)
201 /* NOTE: the following values are a part of MI protocol and represent
202 values of 'disp' field returned when inferior stops at a breakpoint. */
203 static char *bpdisps
[] = {"del", "dstp", "dis", "keep"};
204 return bpdisps
[(int) disp
];
207 /* Prototypes for exported functions. */
208 /* If FALSE, gdb will not use hardware support for watchpoints, even
209 if such is available. */
210 static int can_use_hw_watchpoints
;
213 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
214 struct cmd_list_element
*c
,
217 fprintf_filtered (file
, _("\
218 Debugger's willingness to use watchpoint hardware is %s.\n"),
222 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
223 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
224 for unrecognized breakpoint locations.
225 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
226 static enum auto_boolean pending_break_support
;
228 show_pending_break_support (struct ui_file
*file
, int from_tty
,
229 struct cmd_list_element
*c
,
232 fprintf_filtered (file
, _("\
233 Debugger's behavior regarding pending breakpoints is %s.\n"),
237 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
238 set with "break" but falling in read-only memory.
239 If 0, gdb will warn about such breakpoints, but won't automatically
240 use hardware breakpoints. */
241 static int automatic_hardware_breakpoints
;
243 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
244 struct cmd_list_element
*c
,
247 fprintf_filtered (file
, _("\
248 Automatic usage of hardware breakpoints is %s.\n"),
252 /* If 1, gdb will keep breakpoints inserted even as inferior is stopped,
253 and immediately insert any new breakpoints. If 0, gdb will insert
254 breakpoints into inferior only when resuming it, and will remove
255 breakpoints upon stop. */
256 static int always_inserted_mode
= 0;
258 show_always_inserted_mode (struct ui_file
*file
, int from_tty
,
259 struct cmd_list_element
*c
, const char *value
)
261 fprintf_filtered (file
, _("Always inserted breakpoint mode is %s.\n"), value
);
265 void _initialize_breakpoint (void);
267 extern int addressprint
; /* Print machine addresses? */
269 /* Are we executing breakpoint commands? */
270 static int executing_breakpoint_commands
;
272 /* Are overlay event breakpoints enabled? */
273 static int overlay_events_enabled
;
275 /* Walk the following statement or block through all breakpoints.
276 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
279 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
281 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
282 for (B = breakpoint_chain; \
283 B ? (TMP=B->next, 1): 0; \
286 /* Similar iterators for the low-level breakpoints. */
288 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->global_next)
290 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
291 for (B = bp_location_chain; \
292 B ? (TMP=B->global_next, 1): 0; \
295 /* True if breakpoint hit counts should be displayed in breakpoint info. */
297 int show_breakpoint_hit_counts
= 1;
299 /* Chains of all breakpoints defined. */
301 struct breakpoint
*breakpoint_chain
;
303 struct bp_location
*bp_location_chain
;
305 /* The locations that no longer correspond to any breakpoint,
306 unlinked from bp_location_chain, but for which a hit
307 may still be reported by a target. */
308 VEC(bp_location_p
) *moribund_locations
= NULL
;
310 /* Number of last breakpoint made. */
312 int breakpoint_count
;
314 /* This function returns a pointer to the string representation of the
315 pathname of the dynamically-linked library that has just been
318 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
319 or undefined results are guaranteed.
321 This string's contents are only valid immediately after the
322 inferior has stopped in the dynamic linker hook, and becomes
323 invalid as soon as the inferior is continued. Clients should make
324 a copy of this string if they wish to continue the inferior and
325 then access the string. */
327 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
328 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
331 /* This function returns a pointer to the string representation of the
332 pathname of the dynamically-linked library that has just been
335 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
336 TRUE, or undefined results are guaranteed.
338 This string's contents are only valid immediately after the
339 inferior has stopped in the dynamic linker hook, and becomes
340 invalid as soon as the inferior is continued. Clients should make
341 a copy of this string if they wish to continue the inferior and
342 then access the string. */
344 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
345 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
348 /* This function is called by the "catch load" command. It allows the
349 debugger to be notified by the dynamic linker when a specified
350 library file (or any library file, if filename is NULL) is loaded. */
352 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
353 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
354 error (_("catch of library loads not yet implemented on this platform"))
357 /* This function is called by the "catch unload" command. It allows
358 the debugger to be notified by the dynamic linker when a specified
359 library file (or any library file, if filename is NULL) is
362 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
363 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid, tempflag, filename, cond_string) \
364 error (_("catch of library unloads not yet implemented on this platform"))
367 /* Return whether a breakpoint is an active enabled breakpoint. */
369 breakpoint_enabled (struct breakpoint
*b
)
371 return (b
->enable_state
== bp_enabled
);
374 /* Set breakpoint count to NUM. */
377 set_breakpoint_count (int num
)
379 breakpoint_count
= num
;
380 set_internalvar (lookup_internalvar ("bpnum"),
381 value_from_longest (builtin_type_int
, (LONGEST
) num
));
384 /* Used in run_command to zero the hit count when a new run starts. */
387 clear_breakpoint_hit_counts (void)
389 struct breakpoint
*b
;
395 /* Default address, symtab and line to put a breakpoint at
396 for "break" command with no arg.
397 if default_breakpoint_valid is zero, the other three are
398 not valid, and "break" with no arg is an error.
400 This set by print_stack_frame, which calls set_default_breakpoint. */
402 int default_breakpoint_valid
;
403 CORE_ADDR default_breakpoint_address
;
404 struct symtab
*default_breakpoint_symtab
;
405 int default_breakpoint_line
;
407 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
408 Advance *PP after the string and any trailing whitespace.
410 Currently the string can either be a number or "$" followed by the name
411 of a convenience variable. Making it an expression wouldn't work well
412 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
414 If the string is a NULL pointer, that denotes the last breakpoint.
416 TRAILER is a character which can be found after the number; most
417 commonly this is `-'. If you don't want a trailer, use \0. */
419 get_number_trailer (char **pp
, int trailer
)
421 int retval
= 0; /* default */
425 /* Empty line means refer to the last breakpoint. */
426 return breakpoint_count
;
429 /* Make a copy of the name, so we can null-terminate it
430 to pass to lookup_internalvar(). */
435 while (isalnum (*p
) || *p
== '_')
437 varname
= (char *) alloca (p
- start
+ 1);
438 strncpy (varname
, start
, p
- start
);
439 varname
[p
- start
] = '\0';
440 val
= value_of_internalvar (lookup_internalvar (varname
));
441 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
442 retval
= (int) value_as_long (val
);
445 printf_filtered (_("Convenience variable must have integer value.\n"));
453 while (*p
>= '0' && *p
<= '9')
456 /* There is no number here. (e.g. "cond a == b"). */
458 /* Skip non-numeric token */
459 while (*p
&& !isspace((int) *p
))
461 /* Return zero, which caller must interpret as error. */
467 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
469 /* Trailing junk: return 0 and let caller print error msg. */
470 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
481 /* Like get_number_trailer, but don't allow a trailer. */
483 get_number (char **pp
)
485 return get_number_trailer (pp
, '\0');
488 /* Parse a number or a range.
489 * A number will be of the form handled by get_number.
490 * A range will be of the form <number1> - <number2>, and
491 * will represent all the integers between number1 and number2,
494 * While processing a range, this fuction is called iteratively;
495 * At each call it will return the next value in the range.
497 * At the beginning of parsing a range, the char pointer PP will
498 * be advanced past <number1> and left pointing at the '-' token.
499 * Subsequent calls will not advance the pointer until the range
500 * is completed. The call that completes the range will advance
501 * pointer PP past <number2>.
505 get_number_or_range (char **pp
)
507 static int last_retval
, end_value
;
508 static char *end_ptr
;
509 static int in_range
= 0;
513 /* Default case: pp is pointing either to a solo number,
514 or to the first number of a range. */
515 last_retval
= get_number_trailer (pp
, '-');
520 /* This is the start of a range (<number1> - <number2>).
521 Skip the '-', parse and remember the second number,
522 and also remember the end of the final token. */
526 while (isspace ((int) *end_ptr
))
527 end_ptr
++; /* skip white space */
528 end_value
= get_number (temp
);
529 if (end_value
< last_retval
)
531 error (_("inverted range"));
533 else if (end_value
== last_retval
)
535 /* degenerate range (number1 == number2). Advance the
536 token pointer so that the range will be treated as a
545 error (_("negative value"));
548 /* pp points to the '-' that betokens a range. All
549 number-parsing has already been done. Return the next
550 integer value (one greater than the saved previous value).
551 Do not advance the token pointer 'pp' until the end of range
554 if (++last_retval
== end_value
)
556 /* End of range reached; advance token pointer. */
566 /* condition N EXP -- set break condition of breakpoint N to EXP. */
569 condition_command (char *arg
, int from_tty
)
571 struct breakpoint
*b
;
576 error_no_arg (_("breakpoint number"));
579 bnum
= get_number (&p
);
581 error (_("Bad breakpoint argument: '%s'"), arg
);
584 if (b
->number
== bnum
)
586 struct bp_location
*loc
= b
->loc
;
587 for (; loc
; loc
= loc
->next
)
595 if (b
->cond_string
!= NULL
)
596 xfree (b
->cond_string
);
600 b
->cond_string
= NULL
;
602 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
607 /* I don't know if it matters whether this is the string the user
608 typed in or the decompiled expression. */
609 b
->cond_string
= savestring (arg
, strlen (arg
));
610 b
->condition_not_parsed
= 0;
611 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
615 parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
617 error (_("Junk at end of expression"));
620 breakpoints_changed ();
621 observer_notify_breakpoint_modified (b
->number
);
625 error (_("No breakpoint number %d."), bnum
);
629 commands_command (char *arg
, int from_tty
)
631 struct breakpoint
*b
;
634 struct command_line
*l
;
636 /* If we allowed this, we would have problems with when to
637 free the storage, if we change the commands currently
640 if (executing_breakpoint_commands
)
641 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
644 bnum
= get_number (&p
);
647 error (_("Unexpected extra arguments following breakpoint number."));
650 if (b
->number
== bnum
)
652 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
654 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
655 l
= read_command_lines (tmpbuf
, from_tty
);
656 do_cleanups (cleanups
);
657 free_command_lines (&b
->commands
);
659 breakpoints_changed ();
660 observer_notify_breakpoint_modified (b
->number
);
663 error (_("No breakpoint number %d."), bnum
);
666 /* Like commands_command, but instead of reading the commands from
667 input stream, takes them from an already parsed command structure.
669 This is used by cli-script.c to DTRT with breakpoint commands
670 that are part of if and while bodies. */
671 enum command_control_type
672 commands_from_control_command (char *arg
, struct command_line
*cmd
)
674 struct breakpoint
*b
;
678 /* If we allowed this, we would have problems with when to
679 free the storage, if we change the commands currently
682 if (executing_breakpoint_commands
)
683 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
685 /* An empty string for the breakpoint number means the last
686 breakpoint, but get_number expects a NULL pointer. */
691 bnum
= get_number (&p
);
694 error (_("Unexpected extra arguments following breakpoint number."));
697 if (b
->number
== bnum
)
699 free_command_lines (&b
->commands
);
700 if (cmd
->body_count
!= 1)
701 error (_("Invalid \"commands\" block structure."));
702 /* We need to copy the commands because if/while will free the
703 list after it finishes execution. */
704 b
->commands
= copy_command_lines (cmd
->body_list
[0]);
705 breakpoints_changed ();
706 observer_notify_breakpoint_modified (b
->number
);
707 return simple_control
;
709 error (_("No breakpoint number %d."), bnum
);
712 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
713 by replacing any memory breakpoints with their shadowed contents. */
716 breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
, LONGEST len
)
718 struct bp_location
*b
;
719 CORE_ADDR bp_addr
= 0;
725 if (b
->owner
->type
== bp_none
)
726 warning (_("reading through apparently deleted breakpoint #%d?"),
729 if (b
->loc_type
!= bp_loc_software_breakpoint
)
733 /* Addresses and length of the part of the breakpoint that
735 bp_addr
= b
->target_info
.placed_address
;
736 bp_size
= b
->target_info
.shadow_len
;
738 /* bp isn't valid, or doesn't shadow memory. */
741 if (bp_addr
+ bp_size
<= memaddr
)
742 /* The breakpoint is entirely before the chunk of memory we
746 if (bp_addr
>= memaddr
+ len
)
747 /* The breakpoint is entirely after the chunk of memory we are
751 /* Offset within shadow_contents. */
752 if (bp_addr
< memaddr
)
754 /* Only copy the second part of the breakpoint. */
755 bp_size
-= memaddr
- bp_addr
;
756 bptoffset
= memaddr
- bp_addr
;
760 if (bp_addr
+ bp_size
> memaddr
+ len
)
762 /* Only copy the first part of the breakpoint. */
763 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
766 memcpy (buf
+ bp_addr
- memaddr
,
767 b
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
772 /* A wrapper function for inserting catchpoints. */
774 insert_catchpoint (struct ui_out
*uo
, void *args
)
776 struct breakpoint
*b
= (struct breakpoint
*) args
;
782 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
785 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
788 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
791 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
797 is_hardware_watchpoint (struct breakpoint
*bpt
)
799 return (bpt
->type
== bp_hardware_watchpoint
800 || bpt
->type
== bp_read_watchpoint
801 || bpt
->type
== bp_access_watchpoint
);
804 /* Find the current value of a watchpoint on EXP. Return the value in
805 *VALP and *RESULTP and the chain of intermediate and final values
806 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
809 If an error occurs while evaluating the expression, *RESULTP will
810 be set to NULL. *RESULTP may be a lazy value, if the result could
811 not be read from memory. It is used to determine whether a value
812 is user-specified (we should watch the whole value) or intermediate
813 (we should watch only the bit used to locate the final value).
815 If the final value, or any intermediate value, could not be read
816 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
817 set to any referenced values. *VALP will never be a lazy value.
818 This is the value which we store in struct breakpoint.
820 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
821 value chain. The caller must free the values individually. If
822 VAL_CHAIN is NULL, all generated values will be left on the value
826 fetch_watchpoint_value (struct expression
*exp
, struct value
**valp
,
827 struct value
**resultp
, struct value
**val_chain
)
829 struct value
*mark
, *new_mark
, *result
;
837 /* Evaluate the expression. */
838 mark
= value_mark ();
840 gdb_evaluate_expression (exp
, &result
);
841 new_mark
= value_mark ();
842 if (mark
== new_mark
)
847 /* Make sure it's not lazy, so that after the target stops again we
848 have a non-lazy previous value to compare with. */
850 && (!value_lazy (result
) || gdb_value_fetch_lazy (result
)))
855 /* Return the chain of intermediate values. We use this to
856 decide which addresses to watch. */
857 *val_chain
= new_mark
;
858 value_release_to_mark (mark
);
862 /* Assuming that B is a hardware watchpoint:
863 - Reparse watchpoint expression, is REPARSE is non-zero
864 - Evaluate expression and store the result in B->val
865 - Update the list of values that must be watched in B->loc.
867 If the watchpoint is disabled, do nothing. If this is
868 local watchpoint that is out of scope, delete it. */
870 update_watchpoint (struct breakpoint
*b
, int reparse
)
872 int within_current_scope
;
873 struct frame_id saved_frame_id
;
874 struct bp_location
*loc
;
877 /* We don't free locations. They are stored in
878 bp_location_chain and update_global_locations will
879 eventually delete them and remove breakpoints if
883 if (b
->disposition
== disp_del_at_next_stop
)
886 /* Save the current frame's ID so we can restore it after
887 evaluating the watchpoint expression on its own frame. */
888 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
889 took a frame parameter, so that we didn't have to change the
891 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
893 /* Determine if the watchpoint is within scope. */
894 if (b
->exp_valid_block
== NULL
)
895 within_current_scope
= 1;
898 struct frame_info
*fi
;
899 fi
= frame_find_by_id (b
->watchpoint_frame
);
900 within_current_scope
= (fi
!= NULL
);
901 if (within_current_scope
)
905 if (within_current_scope
&& reparse
)
914 b
->exp
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
915 /* If the meaning of expression itself changed, the old value is
916 no longer relevant. We don't want to report a watchpoint hit
917 to the user when the old value and the new value may actually
918 be completely different objects. */
924 /* If we failed to parse the expression, for example because
925 it refers to a global variable in a not-yet-loaded shared library,
926 don't try to insert watchpoint. We don't automatically delete
927 such watchpoint, though, since failure to parse expression
928 is different from out-of-scope watchpoint. */
929 if (within_current_scope
&& b
->exp
)
931 struct value
*val_chain
, *v
, *result
, *next
;
933 fetch_watchpoint_value (b
->exp
, &v
, &result
, &val_chain
);
935 /* Avoid setting b->val if it's already set. The meaning of
936 b->val is 'the last value' user saw, and we should update
937 it only if we reported that last value to user. As it
938 happens, the code that reports it updates b->val directly. */
945 /* Look at each value on the value chain. */
946 for (v
= val_chain
; v
; v
= next
)
948 /* If it's a memory location, and GDB actually needed
949 its contents to evaluate the expression, then we
950 must watch it. If the first value returned is
951 still lazy, that means an error occurred reading it;
952 watch it anyway in case it becomes readable. */
953 if (VALUE_LVAL (v
) == lval_memory
954 && (v
== val_chain
|| ! value_lazy (v
)))
956 struct type
*vtype
= check_typedef (value_type (v
));
958 /* We only watch structs and arrays if user asked
959 for it explicitly, never if they just happen to
960 appear in the middle of some value chain. */
962 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
963 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
967 struct bp_location
*loc
, **tmp
;
969 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
970 len
= TYPE_LENGTH (value_type (v
));
972 if (b
->type
== bp_read_watchpoint
)
974 else if (b
->type
== bp_access_watchpoint
)
977 loc
= allocate_bp_location (b
, bp_hardware_watchpoint
);
978 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
983 loc
->watchpoint_type
= type
;
987 next
= value_next (v
);
992 /* We just regenerated the list of breakpoint locations.
993 The new location does not have its condition field set to anything
994 and therefore, we must always reparse the cond_string, independently
995 of the value of the reparse flag. */
996 if (b
->cond_string
!= NULL
)
998 char *s
= b
->cond_string
;
999 b
->loc
->cond
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
1002 else if (!within_current_scope
)
1004 printf_filtered (_("\
1005 Hardware watchpoint %d deleted because the program has left the block \n\
1006 in which its expression is valid.\n"),
1008 if (b
->related_breakpoint
)
1009 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1010 b
->disposition
= disp_del_at_next_stop
;
1013 /* Restore the selected frame. */
1014 select_frame (frame_find_by_id (saved_frame_id
));
1018 /* Returns 1 iff breakpoint location should be
1019 inserted in the inferior. */
1021 should_be_inserted (struct bp_location
*bpt
)
1023 if (!breakpoint_enabled (bpt
->owner
))
1026 if (bpt
->owner
->disposition
== disp_del_at_next_stop
)
1029 if (!bpt
->enabled
|| bpt
->shlib_disabled
|| bpt
->duplicate
)
1035 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1036 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1037 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
1039 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1040 method for each breakpoint or catchpoint type. */
1042 insert_bp_location (struct bp_location
*bpt
,
1043 struct ui_file
*tmp_error_stream
,
1044 int *disabled_breaks
, int *process_warning
,
1045 int *hw_breakpoint_error
)
1049 if (!should_be_inserted (bpt
) || bpt
->inserted
)
1052 /* Initialize the target-specific information. */
1053 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
1054 bpt
->target_info
.placed_address
= bpt
->address
;
1056 if (bpt
->loc_type
== bp_loc_software_breakpoint
1057 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1059 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
1061 /* If the explicitly specified breakpoint type
1062 is not hardware breakpoint, check the memory map to see
1063 if the breakpoint address is in read only memory or not.
1064 Two important cases are:
1065 - location type is not hardware breakpoint, memory
1066 is readonly. We change the type of the location to
1067 hardware breakpoint.
1068 - location type is hardware breakpoint, memory is read-write.
1069 This means we've previously made the location hardware one, but
1070 then the memory map changed, so we undo.
1072 When breakpoints are removed, remove_breakpoints will
1073 use location types we've just set here, the only possible
1074 problem is that memory map has changed during running program,
1075 but it's not going to work anyway with current gdb. */
1076 struct mem_region
*mr
1077 = lookup_mem_region (bpt
->target_info
.placed_address
);
1081 if (automatic_hardware_breakpoints
)
1084 enum bp_loc_type new_type
;
1086 if (mr
->attrib
.mode
!= MEM_RW
)
1087 new_type
= bp_loc_hardware_breakpoint
;
1089 new_type
= bp_loc_software_breakpoint
;
1091 if (new_type
!= bpt
->loc_type
)
1093 static int said
= 0;
1094 bpt
->loc_type
= new_type
;
1097 fprintf_filtered (gdb_stdout
, _("\
1098 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1103 else if (bpt
->loc_type
== bp_loc_software_breakpoint
1104 && mr
->attrib
.mode
!= MEM_RW
)
1105 warning (_("cannot set software breakpoint at readonly address %s"),
1106 paddr (bpt
->address
));
1110 /* First check to see if we have to handle an overlay. */
1111 if (overlay_debugging
== ovly_off
1112 || bpt
->section
== NULL
1113 || !(section_is_overlay (bpt
->section
)))
1115 /* No overlay handling: just set the breakpoint. */
1117 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1118 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1120 val
= target_insert_breakpoint (&bpt
->target_info
);
1124 /* This breakpoint is in an overlay section.
1125 Shall we set a breakpoint at the LMA? */
1126 if (!overlay_events_enabled
)
1128 /* Yes -- overlay event support is not active,
1129 so we must try to set a breakpoint at the LMA.
1130 This will not work for a hardware breakpoint. */
1131 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1132 warning (_("hardware breakpoint %d not supported in overlay!"),
1133 bpt
->owner
->number
);
1136 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
1138 /* Set a software (trap) breakpoint at the LMA. */
1139 bpt
->overlay_target_info
= bpt
->target_info
;
1140 bpt
->overlay_target_info
.placed_address
= addr
;
1141 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
1143 fprintf_unfiltered (tmp_error_stream
,
1144 "Overlay breakpoint %d failed: in ROM?",
1145 bpt
->owner
->number
);
1148 /* Shall we set a breakpoint at the VMA? */
1149 if (section_is_mapped (bpt
->section
))
1151 /* Yes. This overlay section is mapped into memory. */
1152 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1153 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1155 val
= target_insert_breakpoint (&bpt
->target_info
);
1159 /* No. This breakpoint will not be inserted.
1160 No error, but do not mark the bp as 'inserted'. */
1167 /* Can't set the breakpoint. */
1168 if (solib_address (bpt
->address
))
1170 /* See also: disable_breakpoints_in_shlibs. */
1172 bpt
->shlib_disabled
= 1;
1173 if (!*disabled_breaks
)
1175 fprintf_unfiltered (tmp_error_stream
,
1176 "Cannot insert breakpoint %d.\n",
1177 bpt
->owner
->number
);
1178 fprintf_unfiltered (tmp_error_stream
,
1179 "Temporarily disabling shared library breakpoints:\n");
1181 *disabled_breaks
= 1;
1182 fprintf_unfiltered (tmp_error_stream
,
1183 "breakpoint #%d\n", bpt
->owner
->number
);
1187 #ifdef ONE_PROCESS_WRITETEXT
1188 *process_warning
= 1;
1190 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1192 *hw_breakpoint_error
= 1;
1193 fprintf_unfiltered (tmp_error_stream
,
1194 "Cannot insert hardware breakpoint %d.\n",
1195 bpt
->owner
->number
);
1199 fprintf_unfiltered (tmp_error_stream
,
1200 "Cannot insert breakpoint %d.\n",
1201 bpt
->owner
->number
);
1202 fprintf_filtered (tmp_error_stream
,
1203 "Error accessing memory address ");
1204 fputs_filtered (paddress (bpt
->address
), tmp_error_stream
);
1205 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1206 safe_strerror (val
));
1217 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
1218 /* NOTE drow/2003-09-08: This state only exists for removing
1219 watchpoints. It's not clear that it's necessary... */
1220 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
1222 val
= target_insert_watchpoint (bpt
->address
,
1224 bpt
->watchpoint_type
);
1225 bpt
->inserted
= (val
!= -1);
1228 else if (bpt
->owner
->type
== bp_catch_fork
1229 || bpt
->owner
->type
== bp_catch_vfork
1230 || bpt
->owner
->type
== bp_catch_exec
)
1232 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1233 bpt
->owner
, RETURN_MASK_ERROR
);
1234 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1235 bpt
->owner
->number
);
1237 bpt
->owner
->enable_state
= bp_disabled
;
1241 /* We've already printed an error message if there was a problem
1242 inserting this catchpoint, and we've disabled the catchpoint,
1243 so just return success. */
1250 /* Make sure all breakpoints are inserted in inferior.
1251 Throws exception on any error.
1252 A breakpoint that is already inserted won't be inserted
1253 again, so calling this function twice is safe. */
1255 insert_breakpoints (void)
1257 struct breakpoint
*bpt
;
1259 ALL_BREAKPOINTS (bpt
)
1260 if (is_hardware_watchpoint (bpt
))
1261 update_watchpoint (bpt
, 0 /* don't reparse. */);
1263 update_global_location_list (1);
1265 if (!always_inserted_mode
&& target_has_execution
)
1266 /* update_global_location_list does not insert breakpoints
1267 when always_inserted_mode is not enabled. Explicitly
1269 insert_breakpoint_locations ();
1272 /* insert_breakpoints is used when starting or continuing the program.
1273 remove_breakpoints is used when the program stops.
1274 Both return zero if successful,
1275 or an `errno' value if could not write the inferior. */
1278 insert_breakpoint_locations (void)
1280 struct breakpoint
*bpt
;
1281 struct bp_location
*b
, *temp
;
1284 int disabled_breaks
= 0;
1285 int hw_breakpoint_error
= 0;
1286 int process_warning
= 0;
1288 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1289 make_cleanup_ui_file_delete (tmp_error_stream
);
1291 /* Explicitly mark the warning -- this will only be printed if
1292 there was an error. */
1293 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1295 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1297 if (!should_be_inserted (b
) || b
->inserted
)
1300 /* There is no point inserting thread-specific breakpoints if the
1301 thread no longer exists. */
1302 if (b
->owner
->thread
!= -1
1303 && !valid_thread_id (b
->owner
->thread
))
1306 val
= insert_bp_location (b
, tmp_error_stream
,
1307 &disabled_breaks
, &process_warning
,
1308 &hw_breakpoint_error
);
1313 /* If we failed to insert all locations of a watchpoint,
1314 remove them, as half-inserted watchpoint is of limited use. */
1315 ALL_BREAKPOINTS (bpt
)
1317 int some_failed
= 0;
1318 struct bp_location
*loc
;
1320 if (!is_hardware_watchpoint (bpt
))
1323 if (bpt
->enable_state
!= bp_enabled
)
1326 if (bpt
->disposition
== disp_del_at_next_stop
)
1329 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1337 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1339 remove_breakpoint (loc
, mark_uninserted
);
1341 hw_breakpoint_error
= 1;
1342 fprintf_unfiltered (tmp_error_stream
,
1343 "Could not insert hardware watchpoint %d.\n",
1351 /* If a hardware breakpoint or watchpoint was inserted, add a
1352 message about possibly exhausted resources. */
1353 if (hw_breakpoint_error
)
1355 fprintf_unfiltered (tmp_error_stream
,
1356 "Could not insert hardware breakpoints:\n\
1357 You may have requested too many hardware breakpoints/watchpoints.\n");
1359 #ifdef ONE_PROCESS_WRITETEXT
1360 if (process_warning
)
1361 fprintf_unfiltered (tmp_error_stream
,
1362 "The same program may be running in another process.");
1364 target_terminal_ours_for_output ();
1365 error_stream (tmp_error_stream
);
1370 remove_breakpoints (void)
1372 struct bp_location
*b
;
1375 ALL_BP_LOCATIONS (b
)
1379 val
= remove_breakpoint (b
, mark_uninserted
);
1388 remove_hw_watchpoints (void)
1390 struct bp_location
*b
;
1393 ALL_BP_LOCATIONS (b
)
1395 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1397 val
= remove_breakpoint (b
, mark_uninserted
);
1406 reattach_breakpoints (int pid
)
1408 struct bp_location
*b
;
1410 struct cleanup
*old_chain
= save_inferior_ptid ();
1411 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1412 int dummy1
= 0, dummy2
= 0, dummy3
= 0;
1414 make_cleanup_ui_file_delete (tmp_error_stream
);
1416 inferior_ptid
= pid_to_ptid (pid
);
1417 ALL_BP_LOCATIONS (b
)
1422 val
= insert_bp_location (b
, tmp_error_stream
,
1423 &dummy1
, &dummy2
, &dummy3
);
1426 do_cleanups (old_chain
);
1431 do_cleanups (old_chain
);
1436 update_breakpoints_after_exec (void)
1438 struct breakpoint
*b
;
1439 struct breakpoint
*temp
;
1440 struct bp_location
*bploc
;
1442 /* We're about to delete breakpoints from GDB's lists. If the
1443 INSERTED flag is true, GDB will try to lift the breakpoints by
1444 writing the breakpoints' "shadow contents" back into memory. The
1445 "shadow contents" are NOT valid after an exec, so GDB should not
1446 do that. Instead, the target is responsible from marking
1447 breakpoints out as soon as it detects an exec. We don't do that
1448 here instead, because there may be other attempts to delete
1449 breakpoints after detecting an exec and before reaching here. */
1450 ALL_BP_LOCATIONS (bploc
)
1451 gdb_assert (!bploc
->inserted
);
1453 ALL_BREAKPOINTS_SAFE (b
, temp
)
1455 /* Solib breakpoints must be explicitly reset after an exec(). */
1456 if (b
->type
== bp_shlib_event
)
1458 delete_breakpoint (b
);
1462 /* Thread event breakpoints must be set anew after an exec(),
1463 as must overlay event breakpoints. */
1464 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1466 delete_breakpoint (b
);
1470 /* Step-resume breakpoints are meaningless after an exec(). */
1471 if (b
->type
== bp_step_resume
)
1473 delete_breakpoint (b
);
1477 /* Longjmp and longjmp-resume breakpoints are also meaningless
1479 if (b
->type
== bp_longjmp
|| b
->type
== bp_longjmp_resume
)
1481 delete_breakpoint (b
);
1485 /* Don't delete an exec catchpoint, because else the inferior
1486 won't stop when it ought!
1488 Similarly, we probably ought to keep vfork catchpoints, 'cause
1489 on this target, we may not be able to stop when the vfork is
1490 seen, but only when the subsequent exec is seen. (And because
1491 deleting fork catchpoints here but not vfork catchpoints will
1492 seem mysterious to users, keep those too.) */
1493 if ((b
->type
== bp_catch_exec
) ||
1494 (b
->type
== bp_catch_vfork
) ||
1495 (b
->type
== bp_catch_fork
))
1500 /* bp_finish is a special case. The only way we ought to be able
1501 to see one of these when an exec() has happened, is if the user
1502 caught a vfork, and then said "finish". Ordinarily a finish just
1503 carries them to the call-site of the current callee, by setting
1504 a temporary bp there and resuming. But in this case, the finish
1505 will carry them entirely through the vfork & exec.
1507 We don't want to allow a bp_finish to remain inserted now. But
1508 we can't safely delete it, 'cause finish_command has a handle to
1509 the bp on a bpstat, and will later want to delete it. There's a
1510 chance (and I've seen it happen) that if we delete the bp_finish
1511 here, that its storage will get reused by the time finish_command
1512 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1513 We really must allow finish_command to delete a bp_finish.
1515 In the absense of a general solution for the "how do we know
1516 it's safe to delete something others may have handles to?"
1517 problem, what we'll do here is just uninsert the bp_finish, and
1518 let finish_command delete it.
1520 (We know the bp_finish is "doomed" in the sense that it's
1521 momentary, and will be deleted as soon as finish_command sees
1522 the inferior stopped. So it doesn't matter that the bp's
1523 address is probably bogus in the new a.out, unlike e.g., the
1524 solib breakpoints.) */
1526 if (b
->type
== bp_finish
)
1531 /* Without a symbolic address, we have little hope of the
1532 pre-exec() address meaning the same thing in the post-exec()
1534 if (b
->addr_string
== NULL
)
1536 delete_breakpoint (b
);
1540 /* FIXME what about longjmp breakpoints? Re-create them here? */
1541 create_overlay_event_breakpoint ("_ovly_debug_event");
1545 detach_breakpoints (int pid
)
1547 struct bp_location
*b
;
1549 struct cleanup
*old_chain
= save_inferior_ptid ();
1551 if (pid
== PIDGET (inferior_ptid
))
1552 error (_("Cannot detach breakpoints of inferior_ptid"));
1554 /* Set inferior_ptid; remove_breakpoint uses this global. */
1555 inferior_ptid
= pid_to_ptid (pid
);
1556 ALL_BP_LOCATIONS (b
)
1560 val
= remove_breakpoint (b
, mark_inserted
);
1563 do_cleanups (old_chain
);
1568 do_cleanups (old_chain
);
1573 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1577 if (b
->owner
->enable_state
== bp_permanent
)
1578 /* Permanent breakpoints cannot be inserted or removed. */
1581 /* The type of none suggests that owner is actually deleted.
1582 This should not ever happen. */
1583 gdb_assert (b
->owner
->type
!= bp_none
);
1585 if (b
->loc_type
== bp_loc_software_breakpoint
1586 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1588 /* "Normal" instruction breakpoint: either the standard
1589 trap-instruction bp (bp_breakpoint), or a
1590 bp_hardware_breakpoint. */
1592 /* First check to see if we have to handle an overlay. */
1593 if (overlay_debugging
== ovly_off
1594 || b
->section
== NULL
1595 || !(section_is_overlay (b
->section
)))
1597 /* No overlay handling: just remove the breakpoint. */
1599 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1600 val
= target_remove_hw_breakpoint (&b
->target_info
);
1602 val
= target_remove_breakpoint (&b
->target_info
);
1606 /* This breakpoint is in an overlay section.
1607 Did we set a breakpoint at the LMA? */
1608 if (!overlay_events_enabled
)
1610 /* Yes -- overlay event support is not active, so we
1611 should have set a breakpoint at the LMA. Remove it.
1613 /* Ignore any failures: if the LMA is in ROM, we will
1614 have already warned when we failed to insert it. */
1615 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1616 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1618 target_remove_breakpoint (&b
->overlay_target_info
);
1620 /* Did we set a breakpoint at the VMA?
1621 If so, we will have marked the breakpoint 'inserted'. */
1624 /* Yes -- remove it. Previously we did not bother to
1625 remove the breakpoint if the section had been
1626 unmapped, but let's not rely on that being safe. We
1627 don't know what the overlay manager might do. */
1628 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1629 val
= target_remove_hw_breakpoint (&b
->target_info
);
1631 /* However, we should remove *software* breakpoints only
1632 if the section is still mapped, or else we overwrite
1633 wrong code with the saved shadow contents. */
1634 else if (section_is_mapped (b
->section
))
1635 val
= target_remove_breakpoint (&b
->target_info
);
1641 /* No -- not inserted, so no need to remove. No error. */
1647 b
->inserted
= (is
== mark_inserted
);
1649 else if (b
->loc_type
== bp_loc_hardware_watchpoint
)
1654 b
->inserted
= (is
== mark_inserted
);
1655 val
= target_remove_watchpoint (b
->address
, b
->length
,
1656 b
->watchpoint_type
);
1658 /* Failure to remove any of the hardware watchpoints comes here. */
1659 if ((is
== mark_uninserted
) && (b
->inserted
))
1660 warning (_("Could not remove hardware watchpoint %d."),
1663 else if ((b
->owner
->type
== bp_catch_fork
||
1664 b
->owner
->type
== bp_catch_vfork
||
1665 b
->owner
->type
== bp_catch_exec
)
1666 && breakpoint_enabled (b
->owner
)
1670 switch (b
->owner
->type
)
1673 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1675 case bp_catch_vfork
:
1676 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1679 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1682 warning (_("Internal error, %s line %d."), __FILE__
, __LINE__
);
1687 b
->inserted
= (is
== mark_inserted
);
1693 /* Clear the "inserted" flag in all breakpoints. */
1696 mark_breakpoints_out (void)
1698 struct bp_location
*bpt
;
1700 ALL_BP_LOCATIONS (bpt
)
1704 /* Clear the "inserted" flag in all breakpoints and delete any
1705 breakpoints which should go away between runs of the program.
1707 Plus other such housekeeping that has to be done for breakpoints
1710 Note: this function gets called at the end of a run (by
1711 generic_mourn_inferior) and when a run begins (by
1712 init_wait_for_inferior). */
1717 breakpoint_init_inferior (enum inf_context context
)
1719 struct breakpoint
*b
, *temp
;
1720 struct bp_location
*bpt
;
1722 ALL_BP_LOCATIONS (bpt
)
1725 ALL_BREAKPOINTS_SAFE (b
, temp
)
1730 case bp_watchpoint_scope
:
1732 /* If the call dummy breakpoint is at the entry point it will
1733 cause problems when the inferior is rerun, so we better
1736 Also get rid of scope breakpoints. */
1737 delete_breakpoint (b
);
1741 case bp_hardware_watchpoint
:
1742 case bp_read_watchpoint
:
1743 case bp_access_watchpoint
:
1745 /* Likewise for watchpoints on local expressions. */
1746 if (b
->exp_valid_block
!= NULL
)
1747 delete_breakpoint (b
);
1748 else if (context
== inf_starting
)
1750 /* Reset val field to force reread of starting value
1751 in insert_breakpoints. */
1753 value_free (b
->val
);
1764 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1765 exists at PC. It returns ordinary_breakpoint_here if it's an
1766 ordinary breakpoint, or permanent_breakpoint_here if it's a
1767 permanent breakpoint.
1768 - When continuing from a location with an ordinary breakpoint, we
1769 actually single step once before calling insert_breakpoints.
1770 - When continuing from a localion with a permanent breakpoint, we
1771 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1772 the target, to advance the PC past the breakpoint. */
1774 enum breakpoint_here
1775 breakpoint_here_p (CORE_ADDR pc
)
1777 const struct bp_location
*bpt
;
1778 int any_breakpoint_here
= 0;
1780 ALL_BP_LOCATIONS (bpt
)
1782 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1783 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1786 if ((breakpoint_enabled (bpt
->owner
)
1787 || bpt
->owner
->enable_state
== bp_permanent
)
1788 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1790 if (overlay_debugging
1791 && section_is_overlay (bpt
->section
)
1792 && !section_is_mapped (bpt
->section
))
1793 continue; /* unmapped overlay -- can't be a match */
1794 else if (bpt
->owner
->enable_state
== bp_permanent
)
1795 return permanent_breakpoint_here
;
1797 any_breakpoint_here
= 1;
1801 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1805 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1806 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1807 This does not check for single-step breakpoints, which are
1808 inserted and removed using direct target manipulation. */
1811 regular_breakpoint_inserted_here_p (CORE_ADDR pc
)
1813 const struct bp_location
*bpt
;
1815 ALL_BP_LOCATIONS (bpt
)
1817 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1818 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1822 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1824 if (overlay_debugging
1825 && section_is_overlay (bpt
->section
)
1826 && !section_is_mapped (bpt
->section
))
1827 continue; /* unmapped overlay -- can't be a match */
1835 /* Returns non-zero iff there's either regular breakpoint
1836 or a single step breakpoint inserted at PC. */
1839 breakpoint_inserted_here_p (CORE_ADDR pc
)
1841 if (regular_breakpoint_inserted_here_p (pc
))
1844 if (single_step_breakpoint_inserted_here_p (pc
))
1850 /* This function returns non-zero iff there is a software breakpoint
1854 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1856 const struct bp_location
*bpt
;
1857 int any_breakpoint_here
= 0;
1859 ALL_BP_LOCATIONS (bpt
)
1861 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1865 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1867 if (overlay_debugging
1868 && section_is_overlay (bpt
->section
)
1869 && !section_is_mapped (bpt
->section
))
1870 continue; /* unmapped overlay -- can't be a match */
1876 /* Also check for software single-step breakpoints. */
1877 if (single_step_breakpoint_inserted_here_p (pc
))
1883 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1884 PC is valid for process/thread PTID. */
1887 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1889 const struct bp_location
*bpt
;
1892 thread
= pid_to_thread_id (ptid
);
1894 ALL_BP_LOCATIONS (bpt
)
1896 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1897 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1900 if ((breakpoint_enabled (bpt
->owner
)
1901 || bpt
->owner
->enable_state
== bp_permanent
)
1902 && bpt
->address
== pc
1903 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1905 if (overlay_debugging
1906 && section_is_overlay (bpt
->section
)
1907 && !section_is_mapped (bpt
->section
))
1908 continue; /* unmapped overlay -- can't be a match */
1918 /* bpstat stuff. External routines' interfaces are documented
1922 ep_is_catchpoint (struct breakpoint
*ep
)
1925 (ep
->type
== bp_catch_load
)
1926 || (ep
->type
== bp_catch_unload
)
1927 || (ep
->type
== bp_catch_fork
)
1928 || (ep
->type
== bp_catch_vfork
)
1929 || (ep
->type
== bp_catch_exec
);
1931 /* ??rehrauer: Add more kinds here, as are implemented... */
1935 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1938 (ep
->type
== bp_catch_load
)
1939 || (ep
->type
== bp_catch_unload
);
1943 bpstat_free (bpstat bs
)
1945 if (bs
->old_val
!= NULL
)
1946 value_free (bs
->old_val
);
1947 free_command_lines (&bs
->commands
);
1951 /* Clear a bpstat so that it says we are not at any breakpoint.
1952 Also free any storage that is part of a bpstat. */
1955 bpstat_clear (bpstat
*bsp
)
1972 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1973 is part of the bpstat is copied as well. */
1976 bpstat_copy (bpstat bs
)
1980 bpstat retval
= NULL
;
1985 for (; bs
!= NULL
; bs
= bs
->next
)
1987 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1988 memcpy (tmp
, bs
, sizeof (*tmp
));
1989 if (bs
->commands
!= NULL
)
1990 tmp
->commands
= copy_command_lines (bs
->commands
);
1991 if (bs
->old_val
!= NULL
)
1993 tmp
->old_val
= value_copy (bs
->old_val
);
1994 release_value (tmp
->old_val
);
1998 /* This is the first thing in the chain. */
2008 /* Find the bpstat associated with this breakpoint */
2011 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
2016 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2018 if (bsp
->breakpoint_at
&& bsp
->breakpoint_at
->owner
== breakpoint
)
2024 /* Find a step_resume breakpoint associated with this bpstat.
2025 (If there are multiple step_resume bp's on the list, this function
2026 will arbitrarily pick one.)
2028 It is an error to use this function if BPSTAT doesn't contain a
2029 step_resume breakpoint.
2031 See wait_for_inferior's use of this function. */
2033 bpstat_find_step_resume_breakpoint (bpstat bsp
)
2037 gdb_assert (bsp
!= NULL
);
2039 current_thread
= pid_to_thread_id (inferior_ptid
);
2041 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2043 if ((bsp
->breakpoint_at
!= NULL
) &&
2044 (bsp
->breakpoint_at
->owner
->type
== bp_step_resume
) &&
2045 (bsp
->breakpoint_at
->owner
->thread
== current_thread
||
2046 bsp
->breakpoint_at
->owner
->thread
== -1))
2047 return bsp
->breakpoint_at
->owner
;
2050 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2054 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2055 at. *BSP upon return is a bpstat which points to the remaining
2056 breakpoints stopped at (but which is not guaranteed to be good for
2057 anything but further calls to bpstat_num).
2058 Return 0 if passed a bpstat which does not indicate any breakpoints.
2059 Return -1 if stopped at a breakpoint that has been deleted since
2061 Return 1 otherwise. */
2064 bpstat_num (bpstat
*bsp
, int *num
)
2066 struct breakpoint
*b
;
2069 return 0; /* No more breakpoint values */
2071 /* We assume we'll never have several bpstats that
2072 correspond to a single breakpoint -- otherwise,
2073 this function might return the same number more
2074 than once and this will look ugly. */
2075 b
= (*bsp
)->breakpoint_at
? (*bsp
)->breakpoint_at
->owner
: NULL
;
2076 *bsp
= (*bsp
)->next
;
2078 return -1; /* breakpoint that's been deleted since */
2080 *num
= b
->number
; /* We have its number */
2084 /* Modify BS so that the actions will not be performed. */
2087 bpstat_clear_actions (bpstat bs
)
2089 for (; bs
!= NULL
; bs
= bs
->next
)
2091 free_command_lines (&bs
->commands
);
2092 if (bs
->old_val
!= NULL
)
2094 value_free (bs
->old_val
);
2100 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2102 cleanup_executing_breakpoints (void *ignore
)
2104 executing_breakpoint_commands
= 0;
2107 /* Execute all the commands associated with all the breakpoints at this
2108 location. Any of these commands could cause the process to proceed
2109 beyond this point, etc. We look out for such changes by checking
2110 the global "breakpoint_proceeded" after each command. */
2113 bpstat_do_actions (bpstat
*bsp
)
2116 struct cleanup
*old_chain
;
2118 /* Avoid endless recursion if a `source' command is contained
2120 if (executing_breakpoint_commands
)
2123 executing_breakpoint_commands
= 1;
2124 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2127 /* Note that (as of this writing), our callers all appear to
2128 be passing us the address of global stop_bpstat. And, if
2129 our calls to execute_control_command cause the inferior to
2130 proceed, that global (and hence, *bsp) will change.
2132 We must be careful to not touch *bsp unless the inferior
2133 has not proceeded. */
2135 /* This pointer will iterate over the list of bpstat's. */
2138 breakpoint_proceeded
= 0;
2139 for (; bs
!= NULL
; bs
= bs
->next
)
2141 struct command_line
*cmd
;
2142 struct cleanup
*this_cmd_tree_chain
;
2144 /* Take ownership of the BSP's command tree, if it has one.
2146 The command tree could legitimately contain commands like
2147 'step' and 'next', which call clear_proceed_status, which
2148 frees stop_bpstat's command tree. To make sure this doesn't
2149 free the tree we're executing out from under us, we need to
2150 take ownership of the tree ourselves. Since a given bpstat's
2151 commands are only executed once, we don't need to copy it; we
2152 can clear the pointer in the bpstat, and make sure we free
2153 the tree when we're done. */
2156 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2160 execute_control_command (cmd
);
2162 if (breakpoint_proceeded
)
2168 /* We can free this command tree now. */
2169 do_cleanups (this_cmd_tree_chain
);
2171 if (breakpoint_proceeded
)
2173 if (target_can_async_p ())
2174 /* If we are in async mode, then the target might
2175 be still running, not stopped at any breakpoint,
2176 so nothing for us to do here -- just return to
2180 /* In sync mode, when execute_control_command returns
2181 we're already standing on the next breakpoint.
2182 Breakpoint commands for that stop were not run,
2183 since execute_command does not run breakpoint
2184 commands -- only command_line_handler does, but
2185 that one is not involved in execution of breakpoint
2186 commands. So, we can now execute breakpoint commands.
2187 There's an implicit assumption that we're called with
2188 stop_bpstat, so our parameter is the new bpstat to
2190 It should be noted that making execute_command do
2191 bpstat actions is not an option -- in this case we'll
2192 have recursive invocation of bpstat for each breakpoint
2193 with a command, and can easily blow up GDB stack. */
2197 do_cleanups (old_chain
);
2200 /* Print out the (old or new) value associated with a watchpoint. */
2203 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2206 fprintf_unfiltered (stream
, _("<unreadable>"));
2208 value_print (val
, stream
, 0, Val_pretty_default
);
2211 /* This is the normal print function for a bpstat. In the future,
2212 much of this logic could (should?) be moved to bpstat_stop_status,
2213 by having it set different print_it values.
2215 Current scheme: When we stop, bpstat_print() is called. It loops
2216 through the bpstat list of things causing this stop, calling the
2217 print_bp_stop_message function on each one. The behavior of the
2218 print_bp_stop_message function depends on the print_it field of
2219 bpstat. If such field so indicates, call this function here.
2221 Return values from this routine (ultimately used by bpstat_print()
2222 and normal_stop() to decide what to do):
2223 PRINT_NOTHING: Means we already printed all we needed to print,
2224 don't print anything else.
2225 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2226 that something to be followed by a location.
2227 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2228 that something to be followed by a location.
2229 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2232 static enum print_stop_action
2233 print_it_typical (bpstat bs
)
2235 struct cleanup
*old_chain
, *ui_out_chain
;
2236 struct breakpoint
*b
;
2237 const struct bp_location
*bl
;
2238 struct ui_stream
*stb
;
2240 stb
= ui_out_stream_new (uiout
);
2241 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2242 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2243 which has since been deleted. */
2244 if (bs
->breakpoint_at
== NULL
)
2245 return PRINT_UNKNOWN
;
2246 bl
= bs
->breakpoint_at
;
2252 case bp_hardware_breakpoint
:
2253 bp_temp
= bs
->breakpoint_at
->owner
->disposition
== disp_del
;
2254 if (bl
->address
!= bl
->requested_address
)
2255 breakpoint_adjustment_warning (bl
->requested_address
,
2258 annotate_breakpoint (b
->number
);
2260 ui_out_text (uiout
, "\nTemporary breakpoint ");
2262 ui_out_text (uiout
, "\nBreakpoint ");
2263 if (ui_out_is_mi_like_p (uiout
))
2265 ui_out_field_string (uiout
, "reason",
2266 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2267 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
2269 ui_out_field_int (uiout
, "bkptno", b
->number
);
2270 ui_out_text (uiout
, ", ");
2271 return PRINT_SRC_AND_LOC
;
2274 case bp_shlib_event
:
2275 /* Did we stop because the user set the stop_on_solib_events
2276 variable? (If so, we report this as a generic, "Stopped due
2277 to shlib event" message.) */
2278 printf_filtered (_("Stopped due to shared library event\n"));
2279 return PRINT_NOTHING
;
2282 case bp_thread_event
:
2283 /* Not sure how we will get here.
2284 GDB should not stop for these breakpoints. */
2285 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2286 return PRINT_NOTHING
;
2289 case bp_overlay_event
:
2290 /* By analogy with the thread event, GDB should not stop for these. */
2291 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2292 return PRINT_NOTHING
;
2296 annotate_catchpoint (b
->number
);
2297 printf_filtered (_("\nCatchpoint %d (loaded %s), "),
2299 b
->triggered_dll_pathname
);
2300 return PRINT_SRC_AND_LOC
;
2303 case bp_catch_unload
:
2304 annotate_catchpoint (b
->number
);
2305 printf_filtered (_("\nCatchpoint %d (unloaded %s), "),
2307 b
->triggered_dll_pathname
);
2308 return PRINT_SRC_AND_LOC
;
2312 annotate_catchpoint (b
->number
);
2313 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
2315 ptid_get_pid (b
->forked_inferior_pid
));
2316 return PRINT_SRC_AND_LOC
;
2319 case bp_catch_vfork
:
2320 annotate_catchpoint (b
->number
);
2321 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
2323 ptid_get_pid (b
->forked_inferior_pid
));
2324 return PRINT_SRC_AND_LOC
;
2328 annotate_catchpoint (b
->number
);
2329 printf_filtered (_("\nCatchpoint %d (exec'd %s), "),
2332 return PRINT_SRC_AND_LOC
;
2336 case bp_hardware_watchpoint
:
2337 annotate_watchpoint (b
->number
);
2338 if (ui_out_is_mi_like_p (uiout
))
2341 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2343 ui_out_chain
= 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 = ");
2348 watchpoint_value_print (b
->val
, stb
->stream
);
2349 ui_out_field_stream (uiout
, "new", stb
);
2350 do_cleanups (ui_out_chain
);
2351 ui_out_text (uiout
, "\n");
2352 /* More than one watchpoint may have been triggered. */
2353 return PRINT_UNKNOWN
;
2356 case bp_read_watchpoint
:
2357 if (ui_out_is_mi_like_p (uiout
))
2360 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2362 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2363 ui_out_text (uiout
, "\nValue = ");
2364 watchpoint_value_print (b
->val
, stb
->stream
);
2365 ui_out_field_stream (uiout
, "value", stb
);
2366 do_cleanups (ui_out_chain
);
2367 ui_out_text (uiout
, "\n");
2368 return PRINT_UNKNOWN
;
2371 case bp_access_watchpoint
:
2372 if (bs
->old_val
!= NULL
)
2374 annotate_watchpoint (b
->number
);
2375 if (ui_out_is_mi_like_p (uiout
))
2378 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2380 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2381 ui_out_text (uiout
, "\nOld value = ");
2382 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2383 ui_out_field_stream (uiout
, "old", stb
);
2384 ui_out_text (uiout
, "\nNew value = ");
2389 if (ui_out_is_mi_like_p (uiout
))
2392 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2393 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2394 ui_out_text (uiout
, "\nValue = ");
2396 watchpoint_value_print (b
->val
, stb
->stream
);
2397 ui_out_field_stream (uiout
, "new", stb
);
2398 do_cleanups (ui_out_chain
);
2399 ui_out_text (uiout
, "\n");
2400 return PRINT_UNKNOWN
;
2403 /* Fall through, we don't deal with these types of breakpoints
2407 if (ui_out_is_mi_like_p (uiout
))
2410 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2411 return PRINT_UNKNOWN
;
2415 if (ui_out_is_mi_like_p (uiout
))
2418 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2419 return PRINT_UNKNOWN
;
2424 case bp_longjmp_resume
:
2425 case bp_step_resume
:
2426 case bp_watchpoint_scope
:
2429 return PRINT_UNKNOWN
;
2433 /* Generic routine for printing messages indicating why we
2434 stopped. The behavior of this function depends on the value
2435 'print_it' in the bpstat structure. Under some circumstances we
2436 may decide not to print anything here and delegate the task to
2439 static enum print_stop_action
2440 print_bp_stop_message (bpstat bs
)
2442 switch (bs
->print_it
)
2445 /* Nothing should be printed for this bpstat entry. */
2446 return PRINT_UNKNOWN
;
2450 /* We still want to print the frame, but we already printed the
2451 relevant messages. */
2452 return PRINT_SRC_AND_LOC
;
2455 case print_it_normal
:
2457 const struct bp_location
*bl
= bs
->breakpoint_at
;
2458 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2460 /* Normal case. Call the breakpoint's print_it method, or
2461 print_it_typical. */
2462 /* FIXME: how breakpoint can ever be NULL here? */
2463 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2464 return b
->ops
->print_it (b
);
2466 return print_it_typical (bs
);
2471 internal_error (__FILE__
, __LINE__
,
2472 _("print_bp_stop_message: unrecognized enum value"));
2477 /* Print a message indicating what happened. This is called from
2478 normal_stop(). The input to this routine is the head of the bpstat
2479 list - a list of the eventpoints that caused this stop. This
2480 routine calls the generic print routine for printing a message
2481 about reasons for stopping. This will print (for example) the
2482 "Breakpoint n," part of the output. The return value of this
2485 PRINT_UNKNOWN: Means we printed nothing
2486 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2487 code to print the location. An example is
2488 "Breakpoint 1, " which should be followed by
2490 PRINT_SRC_ONLY: Means we printed something, but there is no need
2491 to also print the location part of the message.
2492 An example is the catch/throw messages, which
2493 don't require a location appended to the end.
2494 PRINT_NOTHING: We have done some printing and we don't need any
2495 further info to be printed.*/
2497 enum print_stop_action
2498 bpstat_print (bpstat bs
)
2502 /* Maybe another breakpoint in the chain caused us to stop.
2503 (Currently all watchpoints go on the bpstat whether hit or not.
2504 That probably could (should) be changed, provided care is taken
2505 with respect to bpstat_explains_signal). */
2506 for (; bs
; bs
= bs
->next
)
2508 val
= print_bp_stop_message (bs
);
2509 if (val
== PRINT_SRC_ONLY
2510 || val
== PRINT_SRC_AND_LOC
2511 || val
== PRINT_NOTHING
)
2515 /* We reached the end of the chain, or we got a null BS to start
2516 with and nothing was printed. */
2517 return PRINT_UNKNOWN
;
2520 /* Evaluate the expression EXP and return 1 if value is zero.
2521 This is used inside a catch_errors to evaluate the breakpoint condition.
2522 The argument is a "struct expression *" that has been cast to char * to
2523 make it pass through catch_errors. */
2526 breakpoint_cond_eval (void *exp
)
2528 struct value
*mark
= value_mark ();
2529 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2530 value_free_to_mark (mark
);
2534 /* Allocate a new bpstat and chain it to the current one. */
2537 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2541 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2543 bs
->breakpoint_at
= bl
;
2544 /* If the condition is false, etc., don't do the commands. */
2545 bs
->commands
= NULL
;
2547 bs
->print_it
= print_it_normal
;
2551 /* The target has stopped with waitstatus WS. Check if any hardware
2552 watchpoints have triggered, according to the target. */
2555 watchpoints_triggered (struct target_waitstatus
*ws
)
2557 int stopped_by_watchpoint
= STOPPED_BY_WATCHPOINT (*ws
);
2559 struct breakpoint
*b
;
2561 if (!stopped_by_watchpoint
)
2563 /* We were not stopped by a watchpoint. Mark all watchpoints
2564 as not triggered. */
2566 if (b
->type
== bp_hardware_watchpoint
2567 || b
->type
== bp_read_watchpoint
2568 || b
->type
== bp_access_watchpoint
)
2569 b
->watchpoint_triggered
= watch_triggered_no
;
2574 if (!target_stopped_data_address (¤t_target
, &addr
))
2576 /* We were stopped by a watchpoint, but we don't know where.
2577 Mark all watchpoints as unknown. */
2579 if (b
->type
== bp_hardware_watchpoint
2580 || b
->type
== bp_read_watchpoint
2581 || b
->type
== bp_access_watchpoint
)
2582 b
->watchpoint_triggered
= watch_triggered_unknown
;
2584 return stopped_by_watchpoint
;
2587 /* The target could report the data address. Mark watchpoints
2588 affected by this data address as triggered, and all others as not
2592 if (b
->type
== bp_hardware_watchpoint
2593 || b
->type
== bp_read_watchpoint
2594 || b
->type
== bp_access_watchpoint
)
2596 struct bp_location
*loc
;
2599 b
->watchpoint_triggered
= watch_triggered_no
;
2600 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2601 /* Exact match not required. Within range is
2603 if (target_watchpoint_addr_within_range (¤t_target
,
2607 b
->watchpoint_triggered
= watch_triggered_yes
;
2615 /* Possible return values for watchpoint_check (this can't be an enum
2616 because of check_errors). */
2617 /* The watchpoint has been deleted. */
2618 #define WP_DELETED 1
2619 /* The value has changed. */
2620 #define WP_VALUE_CHANGED 2
2621 /* The value has not changed. */
2622 #define WP_VALUE_NOT_CHANGED 3
2624 #define BP_TEMPFLAG 1
2625 #define BP_HARDWAREFLAG 2
2627 /* Check watchpoint condition. */
2630 watchpoint_check (void *p
)
2632 bpstat bs
= (bpstat
) p
;
2633 struct breakpoint
*b
;
2634 struct frame_info
*fr
;
2635 int within_current_scope
;
2637 b
= bs
->breakpoint_at
->owner
;
2639 if (b
->exp_valid_block
== NULL
)
2640 within_current_scope
= 1;
2643 /* There is no current frame at this moment. If we're going to have
2644 any chance of handling watchpoints on local variables, we'll need
2645 the frame chain (so we can determine if we're in scope). */
2646 reinit_frame_cache ();
2647 fr
= frame_find_by_id (b
->watchpoint_frame
);
2648 within_current_scope
= (fr
!= NULL
);
2650 /* If we've gotten confused in the unwinder, we might have
2651 returned a frame that can't describe this variable. */
2652 if (within_current_scope
2653 && (block_linkage_function (b
->exp_valid_block
)
2654 != get_frame_function (fr
)))
2655 within_current_scope
= 0;
2657 /* in_function_epilogue_p() returns a non-zero value if we're still
2658 in the function but the stack frame has already been invalidated.
2659 Since we can't rely on the values of local variables after the
2660 stack has been destroyed, we are treating the watchpoint in that
2661 state as `not changed' without further checking.
2663 vinschen/2003-09-04: The former implementation left out the case
2664 that the watchpoint frame couldn't be found by frame_find_by_id()
2665 because the current PC is currently in an epilogue. Calling
2666 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2667 if ((!within_current_scope
|| fr
== get_current_frame ())
2668 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2669 return WP_VALUE_NOT_CHANGED
;
2670 if (fr
&& within_current_scope
)
2671 /* If we end up stopping, the current frame will get selected
2672 in normal_stop. So this call to select_frame won't affect
2677 if (within_current_scope
)
2679 /* We use value_{,free_to_}mark because it could be a
2680 *long* time before we return to the command level and
2681 call free_all_values. We can't call free_all_values because
2682 we might be in the middle of evaluating a function call. */
2684 struct value
*mark
= value_mark ();
2685 struct value
*new_val
;
2687 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2688 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2689 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2691 if (new_val
!= NULL
)
2693 release_value (new_val
);
2694 value_free_to_mark (mark
);
2696 bs
->old_val
= b
->val
;
2699 /* We will stop here */
2700 return WP_VALUE_CHANGED
;
2704 /* Nothing changed, don't do anything. */
2705 value_free_to_mark (mark
);
2706 /* We won't stop here */
2707 return WP_VALUE_NOT_CHANGED
;
2712 /* This seems like the only logical thing to do because
2713 if we temporarily ignored the watchpoint, then when
2714 we reenter the block in which it is valid it contains
2715 garbage (in the case of a function, it may have two
2716 garbage values, one before and one after the prologue).
2717 So we can't even detect the first assignment to it and
2718 watch after that (since the garbage may or may not equal
2719 the first value assigned). */
2720 /* We print all the stop information in print_it_typical(), but
2721 in this case, by the time we call print_it_typical() this bp
2722 will be deleted already. So we have no choice but print the
2723 information here. */
2724 if (ui_out_is_mi_like_p (uiout
))
2726 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2727 ui_out_text (uiout
, "\nWatchpoint ");
2728 ui_out_field_int (uiout
, "wpnum", b
->number
);
2729 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2730 which its expression is valid.\n");
2732 if (b
->related_breakpoint
)
2733 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2734 b
->disposition
= disp_del_at_next_stop
;
2740 /* Return true if it looks like target has stopped due to hitting
2741 breakpoint location BL. This function does not check if we
2742 should stop, only if BL explains the stop. */
2744 bpstat_check_location (const struct bp_location
*bl
, CORE_ADDR bp_addr
)
2746 struct breakpoint
*b
= bl
->owner
;
2748 if (b
->type
!= bp_watchpoint
2749 && b
->type
!= bp_hardware_watchpoint
2750 && b
->type
!= bp_read_watchpoint
2751 && b
->type
!= bp_access_watchpoint
2752 && b
->type
!= bp_hardware_breakpoint
2753 && b
->type
!= bp_catch_fork
2754 && b
->type
!= bp_catch_vfork
2755 && b
->type
!= bp_catch_exec
) /* a non-watchpoint bp */
2757 if (bl
->address
!= bp_addr
) /* address doesn't match */
2759 if (overlay_debugging
/* unmapped overlay section */
2760 && section_is_overlay (bl
->section
)
2761 && !section_is_mapped (bl
->section
))
2765 /* Continuable hardware watchpoints are treated as non-existent if the
2766 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2767 some data address). Otherwise gdb won't stop on a break instruction
2768 in the code (not from a breakpoint) when a hardware watchpoint has
2769 been defined. Also skip watchpoints which we know did not trigger
2770 (did not match the data address). */
2772 if ((b
->type
== bp_hardware_watchpoint
2773 || b
->type
== bp_read_watchpoint
2774 || b
->type
== bp_access_watchpoint
)
2775 && b
->watchpoint_triggered
== watch_triggered_no
)
2778 if (b
->type
== bp_hardware_breakpoint
)
2780 if (bl
->address
!= bp_addr
)
2782 if (overlay_debugging
/* unmapped overlay section */
2783 && section_is_overlay (bl
->section
)
2784 && !section_is_mapped (bl
->section
))
2788 /* Is this a catchpoint of a load or unload? If so, did we
2789 get a load or unload of the specified library? If not,
2791 if ((b
->type
== bp_catch_load
)
2792 #if defined(SOLIB_HAVE_LOAD_EVENT)
2793 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2794 || ((b
->dll_pathname
!= NULL
)
2795 && (strcmp (b
->dll_pathname
,
2796 SOLIB_LOADED_LIBRARY_PATHNAME (
2797 PIDGET (inferior_ptid
)))
2803 if ((b
->type
== bp_catch_unload
)
2804 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2805 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2806 || ((b
->dll_pathname
!= NULL
)
2807 && (strcmp (b
->dll_pathname
,
2808 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2809 PIDGET (inferior_ptid
)))
2815 if ((b
->type
== bp_catch_fork
)
2816 && !inferior_has_forked (inferior_ptid
,
2817 &b
->forked_inferior_pid
))
2820 if ((b
->type
== bp_catch_vfork
)
2821 && !inferior_has_vforked (inferior_ptid
,
2822 &b
->forked_inferior_pid
))
2825 if ((b
->type
== bp_catch_exec
)
2826 && !inferior_has_execd (inferior_ptid
, &b
->exec_pathname
))
2832 /* If BS refers to a watchpoint, determine if the watched values
2833 has actually changed, and we should stop. If not, set BS->stop
2836 bpstat_check_watchpoint (bpstat bs
)
2838 const struct bp_location
*bl
= bs
->breakpoint_at
;
2839 struct breakpoint
*b
= bl
->owner
;
2841 if (b
->type
== bp_watchpoint
2842 || b
->type
== bp_read_watchpoint
2843 || b
->type
== bp_access_watchpoint
2844 || b
->type
== bp_hardware_watchpoint
)
2848 int must_check_value
= 0;
2850 if (b
->type
== bp_watchpoint
)
2851 /* For a software watchpoint, we must always check the
2853 must_check_value
= 1;
2854 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2855 /* We have a hardware watchpoint (read, write, or access)
2856 and the target earlier reported an address watched by
2858 must_check_value
= 1;
2859 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2860 && b
->type
== bp_hardware_watchpoint
)
2861 /* We were stopped by a hardware watchpoint, but the target could
2862 not report the data address. We must check the watchpoint's
2863 value. Access and read watchpoints are out of luck; without
2864 a data address, we can't figure it out. */
2865 must_check_value
= 1;
2867 if (must_check_value
)
2869 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2871 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2872 int e
= catch_errors (watchpoint_check
, bs
, message
,
2874 do_cleanups (cleanups
);
2878 /* We've already printed what needs to be printed. */
2879 bs
->print_it
= print_it_done
;
2882 case WP_VALUE_CHANGED
:
2883 if (b
->type
== bp_read_watchpoint
)
2885 /* Don't stop: read watchpoints shouldn't fire if
2886 the value has changed. This is for targets
2887 which cannot set read-only watchpoints. */
2888 bs
->print_it
= print_it_noop
;
2892 case WP_VALUE_NOT_CHANGED
:
2893 if (b
->type
== bp_hardware_watchpoint
2894 || b
->type
== bp_watchpoint
)
2896 /* Don't stop: write watchpoints shouldn't fire if
2897 the value hasn't changed. */
2898 bs
->print_it
= print_it_noop
;
2906 /* Error from catch_errors. */
2907 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2908 if (b
->related_breakpoint
)
2909 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2910 b
->disposition
= disp_del_at_next_stop
;
2911 /* We've already printed what needs to be printed. */
2912 bs
->print_it
= print_it_done
;
2916 else /* must_check_value == 0 */
2918 /* This is a case where some watchpoint(s) triggered, but
2919 not at the address of this watchpoint, or else no
2920 watchpoint triggered after all. So don't print
2921 anything for this watchpoint. */
2922 bs
->print_it
= print_it_noop
;
2929 /* Check conditions (condition proper, frame, thread and ignore count)
2930 of breakpoint referred to by BS. If we should not stop for this
2931 breakpoint, set BS->stop to 0. */
2933 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
2935 int thread_id
= pid_to_thread_id (ptid
);
2936 const struct bp_location
*bl
= bs
->breakpoint_at
;
2937 struct breakpoint
*b
= bl
->owner
;
2939 if (frame_id_p (b
->frame_id
)
2940 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2944 int value_is_zero
= 0;
2946 /* If this is a scope breakpoint, mark the associated
2947 watchpoint as triggered so that we will handle the
2948 out-of-scope event. We'll get to the watchpoint next
2950 if (b
->type
== bp_watchpoint_scope
)
2951 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
2953 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
2955 /* Need to select the frame, with all that implies
2956 so that the conditions will have the right context. */
2957 select_frame (get_current_frame ());
2959 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
2960 "Error in testing breakpoint condition:\n",
2962 /* FIXME-someday, should give breakpoint # */
2965 if (bl
->cond
&& value_is_zero
)
2969 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2973 else if (b
->ignore_count
> 0)
2976 annotate_ignore_count_change ();
2978 /* Increase the hit count even though we don't
2986 /* Get a bpstat associated with having just stopped at address
2987 BP_ADDR in thread PTID.
2989 Determine whether we stopped at a breakpoint, etc, or whether we
2990 don't understand this stop. Result is a chain of bpstat's such that:
2992 if we don't understand the stop, the result is a null pointer.
2994 if we understand why we stopped, the result is not null.
2996 Each element of the chain refers to a particular breakpoint or
2997 watchpoint at which we have stopped. (We may have stopped for
2998 several reasons concurrently.)
3000 Each element of the chain has valid next, breakpoint_at,
3001 commands, FIXME??? fields. */
3004 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
3006 struct breakpoint
*b
= NULL
;
3007 const struct bp_location
*bl
;
3008 struct bp_location
*loc
;
3009 /* Root of the chain of bpstat's */
3010 struct bpstats root_bs
[1];
3011 /* Pointer to the last thing in the chain currently. */
3012 bpstat bs
= root_bs
;
3015 ALL_BP_LOCATIONS (bl
)
3019 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
3022 /* For hardware watchpoints, we look only at the first location.
3023 The watchpoint_check function will work on entire expression,
3024 not the individual locations. For read watchopints, the
3025 watchpoints_triggered function have checked all locations
3028 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
3031 if (!bpstat_check_location (bl
, bp_addr
))
3034 /* Come here if it's a watchpoint, or if the break address matches */
3036 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
3038 /* Assume we stop. Should we find watchpoint that is not actually
3039 triggered, or if condition of breakpoint is false, we'll reset
3044 bpstat_check_watchpoint (bs
);
3048 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
3049 /* We do not stop for these. */
3052 bpstat_check_breakpoint_conditions (bs
, ptid
);
3058 /* We will stop here */
3059 if (b
->disposition
== disp_disable
)
3061 b
->enable_state
= bp_disabled
;
3062 update_global_location_list (0);
3066 bs
->commands
= b
->commands
;
3068 (strcmp ("silent", bs
->commands
->line
) == 0
3069 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3071 bs
->commands
= bs
->commands
->next
;
3074 bs
->commands
= copy_command_lines (bs
->commands
);
3077 /* Print nothing for this entry if we dont stop or if we dont print. */
3078 if (bs
->stop
== 0 || bs
->print
== 0)
3079 bs
->print_it
= print_it_noop
;
3082 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
3084 if (loc
->address
== bp_addr
)
3086 bs
= bpstat_alloc (loc
, bs
);
3087 /* For hits of moribund locations, we should just proceed. */
3090 bs
->print_it
= print_it_noop
;
3094 bs
->next
= NULL
; /* Terminate the chain */
3095 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3097 /* If we aren't stopping, the value of some hardware watchpoint may
3098 not have changed, but the intermediate memory locations we are
3099 watching may have. Don't bother if we're stopping; this will get
3101 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3106 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3108 && bs
->breakpoint_at
->owner
3109 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3110 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3111 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3113 /* remove/insert can invalidate bs->breakpoint_at, if this
3114 location is no longer used by the watchpoint. Prevent
3115 further code from trying to use it. */
3116 bs
->breakpoint_at
= NULL
;
3117 remove_breakpoints ();
3118 insert_breakpoints ();
3122 return root_bs
->next
;
3125 /* Tell what to do about this bpstat. */
3127 bpstat_what (bpstat bs
)
3129 /* Classify each bpstat as one of the following. */
3132 /* This bpstat element has no effect on the main_action. */
3135 /* There was a watchpoint, stop but don't print. */
3138 /* There was a watchpoint, stop and print. */
3141 /* There was a breakpoint but we're not stopping. */
3144 /* There was a breakpoint, stop but don't print. */
3147 /* There was a breakpoint, stop and print. */
3150 /* We hit the longjmp breakpoint. */
3153 /* We hit the longjmp_resume breakpoint. */
3156 /* We hit the step_resume breakpoint. */
3159 /* We hit the shared library event breakpoint. */
3162 /* We caught a shared library event. */
3165 /* This is just used to count how many enums there are. */
3169 /* Here is the table which drives this routine. So that we can
3170 format it pretty, we define some abbreviations for the
3171 enum bpstat_what codes. */
3172 #define kc BPSTAT_WHAT_KEEP_CHECKING
3173 #define ss BPSTAT_WHAT_STOP_SILENT
3174 #define sn BPSTAT_WHAT_STOP_NOISY
3175 #define sgl BPSTAT_WHAT_SINGLE
3176 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3177 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3178 #define sr BPSTAT_WHAT_STEP_RESUME
3179 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3180 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
3182 /* "Can't happen." Might want to print an error message.
3183 abort() is not out of the question, but chances are GDB is just
3184 a bit confused, not unusable. */
3185 #define err BPSTAT_WHAT_STOP_NOISY
3187 /* Given an old action and a class, come up with a new action. */
3188 /* One interesting property of this table is that wp_silent is the same
3189 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3190 after stopping, the check for whether to step over a breakpoint
3191 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3192 reference to how we stopped. We retain separate wp_silent and
3193 bp_silent codes in case we want to change that someday.
3195 Another possibly interesting property of this table is that
3196 there's a partial ordering, priority-like, of the actions. Once
3197 you've decided that some action is appropriate, you'll never go
3198 back and decide something of a lower priority is better. The
3201 kc < clr sgl shl shlr slr sn sr ss
3202 sgl < shl shlr slr sn sr ss
3203 slr < err shl shlr sn sr ss
3204 clr < err shl shlr sn sr ss
3211 What I think this means is that we don't need a damned table
3212 here. If you just put the rows and columns in the right order,
3213 it'd look awfully regular. We could simply walk the bpstat list
3214 and choose the highest priority action we find, with a little
3215 logic to handle the 'err' cases. */
3217 /* step_resume entries: a step resume breakpoint overrides another
3218 breakpoint of signal handling (see comment in wait_for_inferior
3219 at where we set the step_resume breakpoint). */
3221 static const enum bpstat_what_main_action
3222 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3225 /* kc ss sn sgl slr clr sr shl shlr
3228 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
, shlr
},
3230 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
, shlr
},
3232 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3234 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
, shlr
},
3236 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
, shlr
},
3238 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3240 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
, shlr
},
3242 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
, shlr
},
3244 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3246 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
, shlr
},
3248 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, sr
, shlr
, shlr
}
3262 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3263 struct bpstat_what retval
;
3265 retval
.call_dummy
= 0;
3266 for (; bs
!= NULL
; bs
= bs
->next
)
3268 enum class bs_class
= no_effect
;
3269 if (bs
->breakpoint_at
== NULL
)
3270 /* I suspect this can happen if it was a momentary breakpoint
3271 which has since been deleted. */
3273 if (bs
->breakpoint_at
->owner
== NULL
)
3274 bs_class
= bp_nostop
;
3276 switch (bs
->breakpoint_at
->owner
->type
)
3282 case bp_hardware_breakpoint
:
3288 bs_class
= bp_noisy
;
3290 bs_class
= bp_silent
;
3293 bs_class
= bp_nostop
;
3296 case bp_hardware_watchpoint
:
3297 case bp_read_watchpoint
:
3298 case bp_access_watchpoint
:
3302 bs_class
= wp_noisy
;
3304 bs_class
= wp_silent
;
3307 /* There was a watchpoint, but we're not stopping.
3308 This requires no further action. */
3309 bs_class
= no_effect
;
3312 bs_class
= long_jump
;
3314 case bp_longjmp_resume
:
3315 bs_class
= long_resume
;
3317 case bp_step_resume
:
3320 bs_class
= step_resume
;
3323 /* It is for the wrong frame. */
3324 bs_class
= bp_nostop
;
3326 case bp_watchpoint_scope
:
3327 bs_class
= bp_nostop
;
3329 case bp_shlib_event
:
3330 bs_class
= shlib_event
;
3332 case bp_thread_event
:
3333 case bp_overlay_event
:
3334 bs_class
= bp_nostop
;
3337 case bp_catch_unload
:
3338 /* Only if this catchpoint triggered should we cause the
3339 step-out-of-dld behaviour. Otherwise, we ignore this
3342 bs_class
= catch_shlib_event
;
3344 bs_class
= no_effect
;
3347 case bp_catch_vfork
:
3352 bs_class
= bp_noisy
;
3354 bs_class
= bp_silent
;
3357 /* There was a catchpoint, but we're not stopping.
3358 This requires no further action. */
3359 bs_class
= no_effect
;
3362 /* Make sure the action is stop (silent or noisy),
3363 so infrun.c pops the dummy frame. */
3364 bs_class
= bp_silent
;
3365 retval
.call_dummy
= 1;
3368 current_action
= table
[(int) bs_class
][(int) current_action
];
3370 retval
.main_action
= current_action
;
3374 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3375 without hardware support). This isn't related to a specific bpstat,
3376 just to things like whether watchpoints are set. */
3379 bpstat_should_step (void)
3381 struct breakpoint
*b
;
3383 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3390 /* Given a bpstat that records zero or more triggered eventpoints, this
3391 function returns another bpstat which contains only the catchpoints
3392 on that first list, if any. */
3394 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3396 struct bpstats root_bs
[1];
3397 bpstat bs
= root_bs
;
3398 struct breakpoint
*ep
;
3401 bpstat_clear (cp_list
);
3402 root_bs
->next
= NULL
;
3404 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3406 /* Is this eventpoint a catchpoint? If not, ignore it. */
3407 ep
= ep_list
->breakpoint_at
->owner
;
3410 if ((ep
->type
!= bp_catch_load
) &&
3411 (ep
->type
!= bp_catch_unload
))
3412 /* pai: (temp) ADD fork/vfork here!! */
3415 /* Yes; add it to the list. */
3416 bs
= bpstat_alloc (ep_list
->breakpoint_at
, bs
);
3421 #if defined(SOLIB_ADD)
3422 /* Also, for each triggered catchpoint, tag it with the name of
3423 the library that caused this trigger. (We copy the name now,
3424 because it's only guaranteed to be available NOW, when the
3425 catchpoint triggers. Clients who may wish to know the name
3426 later must get it from the catchpoint itself.) */
3427 if (ep
->triggered_dll_pathname
!= NULL
)
3428 xfree (ep
->triggered_dll_pathname
);
3429 if (ep
->type
== bp_catch_load
)
3430 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3431 PIDGET (inferior_ptid
));
3433 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3434 PIDGET (inferior_ptid
));
3436 dll_pathname
= NULL
;
3440 ep
->triggered_dll_pathname
= (char *)
3441 xmalloc (strlen (dll_pathname
) + 1);
3442 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3445 ep
->triggered_dll_pathname
= NULL
;
3451 static void print_breakpoint_location (struct breakpoint
*b
,
3452 struct bp_location
*loc
,
3454 struct ui_stream
*stb
)
3459 = find_pc_sect_function (loc
->address
, loc
->section
);
3462 ui_out_text (uiout
, "in ");
3463 ui_out_field_string (uiout
, "func",
3464 SYMBOL_PRINT_NAME (sym
));
3465 ui_out_wrap_hint (uiout
, wrap_indent
);
3466 ui_out_text (uiout
, " at ");
3468 ui_out_field_string (uiout
, "file", b
->source_file
);
3469 ui_out_text (uiout
, ":");
3471 if (ui_out_is_mi_like_p (uiout
))
3473 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3474 char *fullname
= symtab_to_fullname (sal
.symtab
);
3477 ui_out_field_string (uiout
, "fullname", fullname
);
3480 ui_out_field_int (uiout
, "line", b
->line_number
);
3484 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3488 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3489 ui_out_field_stream (uiout
, "at", stb
);
3493 /* Print B to gdb_stdout. */
3495 print_one_breakpoint_location (struct breakpoint
*b
,
3496 struct bp_location
*loc
,
3498 CORE_ADDR
*last_addr
)
3500 struct command_line
*l
;
3502 struct ep_type_description
3507 static struct ep_type_description bptypes
[] =
3509 {bp_none
, "?deleted?"},
3510 {bp_breakpoint
, "breakpoint"},
3511 {bp_hardware_breakpoint
, "hw breakpoint"},
3512 {bp_until
, "until"},
3513 {bp_finish
, "finish"},
3514 {bp_watchpoint
, "watchpoint"},
3515 {bp_hardware_watchpoint
, "hw watchpoint"},
3516 {bp_read_watchpoint
, "read watchpoint"},
3517 {bp_access_watchpoint
, "acc watchpoint"},
3518 {bp_longjmp
, "longjmp"},
3519 {bp_longjmp_resume
, "longjmp resume"},
3520 {bp_step_resume
, "step resume"},
3521 {bp_watchpoint_scope
, "watchpoint scope"},
3522 {bp_call_dummy
, "call dummy"},
3523 {bp_shlib_event
, "shlib events"},
3524 {bp_thread_event
, "thread events"},
3525 {bp_overlay_event
, "overlay events"},
3526 {bp_catch_load
, "catch load"},
3527 {bp_catch_unload
, "catch unload"},
3528 {bp_catch_fork
, "catch fork"},
3529 {bp_catch_vfork
, "catch vfork"},
3530 {bp_catch_exec
, "catch exec"}
3533 static char bpenables
[] = "nynny";
3534 char wrap_indent
[80];
3535 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3536 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3537 struct cleanup
*bkpt_chain
;
3539 int header_of_multiple
= 0;
3540 int part_of_multiple
= (loc
!= NULL
);
3542 gdb_assert (!loc
|| loc_number
!= 0);
3543 /* See comment in print_one_breakpoint concerning
3544 treatment of breakpoints with single disabled
3548 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3549 header_of_multiple
= 1;
3554 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3558 if (part_of_multiple
)
3561 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3562 ui_out_field_string (uiout
, "number", formatted
);
3567 ui_out_field_int (uiout
, "number", b
->number
);
3572 if (part_of_multiple
)
3573 ui_out_field_skip (uiout
, "type");
3576 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3577 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3578 internal_error (__FILE__
, __LINE__
,
3579 _("bptypes table does not describe type #%d."),
3581 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3586 if (part_of_multiple
)
3587 ui_out_field_skip (uiout
, "disp");
3589 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3594 if (part_of_multiple
)
3595 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3597 ui_out_field_fmt (uiout
, "enabled", "%c",
3598 bpenables
[(int) b
->enable_state
]);
3599 ui_out_spaces (uiout
, 2);
3603 strcpy (wrap_indent
, " ");
3606 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3607 strcat (wrap_indent
, " ");
3609 strcat (wrap_indent
, " ");
3612 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3614 /* Although the print_one can possibly print
3615 all locations, calling it here is not likely
3616 to get any nice result. So, make sure there's
3617 just one location. */
3618 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3619 b
->ops
->print_one (b
, last_addr
);
3625 internal_error (__FILE__
, __LINE__
,
3626 _("print_one_breakpoint: bp_none encountered\n"));
3630 case bp_hardware_watchpoint
:
3631 case bp_read_watchpoint
:
3632 case bp_access_watchpoint
:
3633 /* Field 4, the address, is omitted (which makes the columns
3634 not line up too nicely with the headers, but the effect
3635 is relatively readable). */
3637 ui_out_field_skip (uiout
, "addr");
3639 print_expression (b
->exp
, stb
->stream
);
3640 ui_out_field_stream (uiout
, "what", stb
);
3644 case bp_catch_unload
:
3645 /* Field 4, the address, is omitted (which makes the columns
3646 not line up too nicely with the headers, but the effect
3647 is relatively readable). */
3649 ui_out_field_skip (uiout
, "addr");
3651 if (b
->dll_pathname
== NULL
)
3653 ui_out_field_string (uiout
, "what", "<any library>");
3654 ui_out_spaces (uiout
, 1);
3658 ui_out_text (uiout
, "library \"");
3659 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3660 ui_out_text (uiout
, "\" ");
3665 case bp_catch_vfork
:
3666 /* Field 4, the address, is omitted (which makes the columns
3667 not line up too nicely with the headers, but the effect
3668 is relatively readable). */
3670 ui_out_field_skip (uiout
, "addr");
3672 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
3674 ui_out_text (uiout
, "process ");
3675 ui_out_field_int (uiout
, "what",
3676 ptid_get_pid (b
->forked_inferior_pid
));
3677 ui_out_spaces (uiout
, 1);
3682 /* Field 4, the address, is omitted (which makes the columns
3683 not line up too nicely with the headers, but the effect
3684 is relatively readable). */
3686 ui_out_field_skip (uiout
, "addr");
3688 if (b
->exec_pathname
!= NULL
)
3690 ui_out_text (uiout
, "program \"");
3691 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3692 ui_out_text (uiout
, "\" ");
3697 case bp_hardware_breakpoint
:
3701 case bp_longjmp_resume
:
3702 case bp_step_resume
:
3703 case bp_watchpoint_scope
:
3705 case bp_shlib_event
:
3706 case bp_thread_event
:
3707 case bp_overlay_event
:
3711 if (header_of_multiple
)
3712 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3713 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3714 ui_out_field_string (uiout
, "addr", "<PENDING>");
3716 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3719 if (!header_of_multiple
)
3720 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3722 *last_addr
= b
->loc
->address
;
3726 if (!part_of_multiple
&& b
->thread
!= -1)
3728 /* FIXME: This seems to be redundant and lost here; see the
3729 "stop only in" line a little further down. */
3730 ui_out_text (uiout
, " thread ");
3731 ui_out_field_int (uiout
, "thread", b
->thread
);
3734 ui_out_text (uiout
, "\n");
3736 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3739 ui_out_text (uiout
, "\tstop only in stack frame at ");
3740 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3742 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3743 ui_out_text (uiout
, "\n");
3746 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3748 /* We do not print the condition for Ada exception catchpoints
3749 because the condition is an internal implementation detail
3750 that we do not want to expose to the user. */
3752 ui_out_text (uiout
, "\tstop only if ");
3753 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3754 ui_out_text (uiout
, "\n");
3757 if (!part_of_multiple
&& b
->thread
!= -1)
3759 /* FIXME should make an annotation for this */
3760 ui_out_text (uiout
, "\tstop only in thread ");
3761 ui_out_field_int (uiout
, "thread", b
->thread
);
3762 ui_out_text (uiout
, "\n");
3765 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
)
3767 /* FIXME should make an annotation for this */
3768 if (ep_is_catchpoint (b
))
3769 ui_out_text (uiout
, "\tcatchpoint");
3771 ui_out_text (uiout
, "\tbreakpoint");
3772 ui_out_text (uiout
, " already hit ");
3773 ui_out_field_int (uiout
, "times", b
->hit_count
);
3774 if (b
->hit_count
== 1)
3775 ui_out_text (uiout
, " time\n");
3777 ui_out_text (uiout
, " times\n");
3780 /* Output the count also if it is zero, but only if this is
3781 mi. FIXME: Should have a better test for this. */
3782 if (ui_out_is_mi_like_p (uiout
))
3783 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3784 ui_out_field_int (uiout
, "times", b
->hit_count
);
3786 if (!part_of_multiple
&& b
->ignore_count
)
3789 ui_out_text (uiout
, "\tignore next ");
3790 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3791 ui_out_text (uiout
, " hits\n");
3794 if (!part_of_multiple
&& (l
= b
->commands
))
3796 struct cleanup
*script_chain
;
3799 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3800 print_command_lines (uiout
, l
, 4);
3801 do_cleanups (script_chain
);
3804 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3807 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3808 else if (b
->exp_string
)
3809 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3812 do_cleanups (bkpt_chain
);
3813 do_cleanups (old_chain
);
3817 print_one_breakpoint (struct breakpoint
*b
,
3818 CORE_ADDR
*last_addr
)
3820 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3822 /* If this breakpoint has custom print function,
3823 it's already printed. Otherwise, print individual
3824 locations, if any. */
3825 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3827 /* If breakpoint has a single location that is
3828 disabled, we print it as if it had
3829 several locations, since otherwise it's hard to
3830 represent "breakpoint enabled, location disabled"
3832 Note that while hardware watchpoints have
3833 several locations internally, that's no a property
3836 && !is_hardware_watchpoint (b
)
3837 && (b
->loc
->next
|| !b
->loc
->enabled
)
3838 && !ui_out_is_mi_like_p (uiout
))
3840 struct bp_location
*loc
;
3842 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3843 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3849 struct captured_breakpoint_query_args
3855 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3857 struct captured_breakpoint_query_args
*args
= data
;
3858 struct breakpoint
*b
;
3859 CORE_ADDR dummy_addr
= 0;
3862 if (args
->bnum
== b
->number
)
3864 print_one_breakpoint (b
, &dummy_addr
);
3872 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3874 struct captured_breakpoint_query_args args
;
3876 /* For the moment we don't trust print_one_breakpoint() to not throw
3878 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3879 error_message
, RETURN_MASK_ALL
) < 0)
3885 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3886 catchpoints, et.al.). */
3889 user_settable_breakpoint (const struct breakpoint
*b
)
3891 return (b
->type
== bp_breakpoint
3892 || b
->type
== bp_catch_load
3893 || b
->type
== bp_catch_unload
3894 || b
->type
== bp_catch_fork
3895 || b
->type
== bp_catch_vfork
3896 || b
->type
== bp_catch_exec
3897 || b
->type
== bp_hardware_breakpoint
3898 || b
->type
== bp_watchpoint
3899 || b
->type
== bp_read_watchpoint
3900 || b
->type
== bp_access_watchpoint
3901 || b
->type
== bp_hardware_watchpoint
);
3904 /* Print information on user settable breakpoint (watchpoint, etc)
3905 number BNUM. If BNUM is -1 print all user settable breakpoints.
3906 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3909 breakpoint_1 (int bnum
, int allflag
)
3911 struct breakpoint
*b
;
3912 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3913 int nr_printable_breakpoints
;
3914 struct cleanup
*bkpttbl_chain
;
3916 /* Compute the number of rows in the table. */
3917 nr_printable_breakpoints
= 0;
3920 || bnum
== b
->number
)
3922 if (allflag
|| user_settable_breakpoint (b
))
3923 nr_printable_breakpoints
++;
3928 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3932 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3935 if (nr_printable_breakpoints
> 0)
3936 annotate_breakpoints_headers ();
3937 if (nr_printable_breakpoints
> 0)
3939 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3940 if (nr_printable_breakpoints
> 0)
3942 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3943 if (nr_printable_breakpoints
> 0)
3945 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3946 if (nr_printable_breakpoints
> 0)
3948 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3951 if (nr_printable_breakpoints
> 0)
3953 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3954 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3956 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3958 if (nr_printable_breakpoints
> 0)
3960 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3961 ui_out_table_body (uiout
);
3962 if (nr_printable_breakpoints
> 0)
3963 annotate_breakpoints_table ();
3967 || bnum
== b
->number
)
3969 /* We only print out user settable breakpoints unless the
3971 if (allflag
|| user_settable_breakpoint (b
))
3972 print_one_breakpoint (b
, &last_addr
);
3975 do_cleanups (bkpttbl_chain
);
3977 if (nr_printable_breakpoints
== 0)
3980 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3982 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3987 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3988 that a comparison of an unsigned with -1 is always false. */
3989 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3990 set_next_address (last_addr
);
3993 /* FIXME? Should this be moved up so that it is only called when
3994 there have been breakpoints? */
3995 annotate_breakpoints_table_end ();
3999 breakpoints_info (char *bnum_exp
, int from_tty
)
4004 bnum
= parse_and_eval_long (bnum_exp
);
4006 breakpoint_1 (bnum
, 0);
4010 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
4015 bnum
= parse_and_eval_long (bnum_exp
);
4017 breakpoint_1 (bnum
, 1);
4021 breakpoint_has_pc (struct breakpoint
*b
, CORE_ADDR pc
, asection
*section
)
4023 struct bp_location
*bl
= b
->loc
;
4024 for (; bl
; bl
= bl
->next
)
4026 if (bl
->address
== pc
4027 && (!overlay_debugging
|| bl
->section
== section
))
4033 /* Print a message describing any breakpoints set at PC. */
4036 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
, int thread
)
4039 struct breakpoint
*b
;
4042 others
+= breakpoint_has_pc (b
, pc
, section
);
4046 printf_filtered (_("Note: breakpoint "));
4047 else /* if (others == ???) */
4048 printf_filtered (_("Note: breakpoints "));
4050 if (breakpoint_has_pc (b
, pc
, section
))
4053 printf_filtered ("%d", b
->number
);
4054 if (b
->thread
== -1 && thread
!= -1)
4055 printf_filtered (" (all threads)");
4056 else if (b
->thread
!= -1)
4057 printf_filtered (" (thread %d)", b
->thread
);
4058 printf_filtered ("%s%s ",
4059 ((b
->enable_state
== bp_disabled
||
4060 b
->enable_state
== bp_call_disabled
)
4062 : b
->enable_state
== bp_permanent
4066 : ((others
== 1) ? " and" : ""));
4068 printf_filtered (_("also set at pc "));
4069 fputs_filtered (paddress (pc
), gdb_stdout
);
4070 printf_filtered (".\n");
4074 /* Set the default place to put a breakpoint
4075 for the `break' command with no arguments. */
4078 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
4081 default_breakpoint_valid
= valid
;
4082 default_breakpoint_address
= addr
;
4083 default_breakpoint_symtab
= symtab
;
4084 default_breakpoint_line
= line
;
4087 /* Return true iff it is meaningful to use the address member of
4088 BPT. For some breakpoint types, the address member is irrelevant
4089 and it makes no sense to attempt to compare it to other addresses
4090 (or use it for any other purpose either).
4092 More specifically, each of the following breakpoint types will always
4093 have a zero valued address and we don't want check_duplicates() to mark
4094 breakpoints of any of these types to be a duplicate of an actual
4095 breakpoint at address zero:
4098 bp_hardware_watchpoint
4100 bp_access_watchpoint
4106 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
4108 enum bptype type
= bpt
->type
;
4110 return (type
!= bp_watchpoint
4111 && type
!= bp_hardware_watchpoint
4112 && type
!= bp_read_watchpoint
4113 && type
!= bp_access_watchpoint
4114 && type
!= bp_catch_exec
4115 && type
!= bp_catch_fork
4116 && type
!= bp_catch_vfork
);
4119 /* Rescan breakpoints at the same address and section as BPT,
4120 marking the first one as "first" and any others as "duplicates".
4121 This is so that the bpt instruction is only inserted once.
4122 If we have a permanent breakpoint at the same place as BPT, make
4123 that one the official one, and the rest as duplicates. */
4126 check_duplicates_for (CORE_ADDR address
, asection
*section
)
4128 struct bp_location
*b
;
4130 struct bp_location
*perm_bp
= 0;
4132 ALL_BP_LOCATIONS (b
)
4133 if (b
->owner
->enable_state
!= bp_disabled
4134 && b
->owner
->enable_state
!= bp_call_disabled
4136 && !b
->shlib_disabled
4137 && b
->address
== address
/* address / overlay match */
4138 && (!overlay_debugging
|| b
->section
== section
)
4139 && breakpoint_address_is_meaningful (b
->owner
))
4141 /* Have we found a permanent breakpoint? */
4142 if (b
->owner
->enable_state
== bp_permanent
)
4149 b
->duplicate
= count
> 1;
4152 /* If we found a permanent breakpoint at this address, go over the
4153 list again and declare all the other breakpoints there to be the
4157 perm_bp
->duplicate
= 0;
4159 /* Permanent breakpoint should always be inserted. */
4160 if (! perm_bp
->inserted
)
4161 internal_error (__FILE__
, __LINE__
,
4162 _("allegedly permanent breakpoint is not "
4163 "actually inserted"));
4165 ALL_BP_LOCATIONS (b
)
4168 if (b
->owner
->enable_state
!= bp_disabled
4169 && b
->owner
->enable_state
!= bp_call_disabled
4170 && b
->enabled
&& !b
->shlib_disabled
4171 && b
->address
== address
/* address / overlay match */
4172 && (!overlay_debugging
|| b
->section
== section
)
4173 && breakpoint_address_is_meaningful (b
->owner
))
4176 internal_error (__FILE__
, __LINE__
,
4177 _("another breakpoint was inserted on top of "
4178 "a permanent breakpoint"));
4187 check_duplicates (struct breakpoint
*bpt
)
4189 struct bp_location
*bl
= bpt
->loc
;
4191 if (! breakpoint_address_is_meaningful (bpt
))
4194 for (; bl
; bl
= bl
->next
)
4195 check_duplicates_for (bl
->address
, bl
->section
);
4199 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4200 int bnum
, int have_bnum
)
4205 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4206 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4208 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4209 bnum
, astr1
, astr2
);
4211 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4214 /* Adjust a breakpoint's address to account for architectural constraints
4215 on breakpoint placement. Return the adjusted address. Note: Very
4216 few targets require this kind of adjustment. For most targets,
4217 this function is simply the identity function. */
4220 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4222 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4224 /* Very few targets need any kind of breakpoint adjustment. */
4227 else if (bptype
== bp_watchpoint
4228 || bptype
== bp_hardware_watchpoint
4229 || bptype
== bp_read_watchpoint
4230 || bptype
== bp_access_watchpoint
4231 || bptype
== bp_catch_fork
4232 || bptype
== bp_catch_vfork
4233 || bptype
== bp_catch_exec
)
4235 /* Watchpoints and the various bp_catch_* eventpoints should not
4236 have their addresses modified. */
4241 CORE_ADDR adjusted_bpaddr
;
4243 /* Some targets have architectural constraints on the placement
4244 of breakpoint instructions. Obtain the adjusted address. */
4245 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4248 /* An adjusted breakpoint address can significantly alter
4249 a user's expectations. Print a warning if an adjustment
4251 if (adjusted_bpaddr
!= bpaddr
)
4252 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4254 return adjusted_bpaddr
;
4258 /* Allocate a struct bp_location. */
4260 static struct bp_location
*
4261 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
4263 struct bp_location
*loc
, *loc_p
;
4265 loc
= xmalloc (sizeof (struct bp_location
));
4266 memset (loc
, 0, sizeof (*loc
));
4270 loc
->shlib_disabled
= 0;
4279 case bp_longjmp_resume
:
4280 case bp_step_resume
:
4281 case bp_watchpoint_scope
:
4283 case bp_shlib_event
:
4284 case bp_thread_event
:
4285 case bp_overlay_event
:
4287 case bp_catch_unload
:
4288 loc
->loc_type
= bp_loc_software_breakpoint
;
4290 case bp_hardware_breakpoint
:
4291 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4293 case bp_hardware_watchpoint
:
4294 case bp_read_watchpoint
:
4295 case bp_access_watchpoint
:
4296 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4300 case bp_catch_vfork
:
4302 loc
->loc_type
= bp_loc_other
;
4305 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4311 static void free_bp_location (struct bp_location
*loc
)
4316 if (loc
->function_name
)
4317 xfree (loc
->function_name
);
4322 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4323 that has type BPTYPE and has no locations as yet. */
4325 static struct breakpoint
*
4326 set_raw_breakpoint_without_location (enum bptype bptype
)
4328 struct breakpoint
*b
, *b1
;
4330 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4331 memset (b
, 0, sizeof (*b
));
4334 b
->language
= current_language
->la_language
;
4335 b
->input_radix
= input_radix
;
4337 b
->enable_state
= bp_enabled
;
4340 b
->ignore_count
= 0;
4342 b
->frame_id
= null_frame_id
;
4343 b
->dll_pathname
= NULL
;
4344 b
->triggered_dll_pathname
= NULL
;
4345 b
->forked_inferior_pid
= null_ptid
;
4346 b
->exec_pathname
= NULL
;
4348 b
->condition_not_parsed
= 0;
4350 /* Add this breakpoint to the end of the chain
4351 so that a list of breakpoints will come out in order
4352 of increasing numbers. */
4354 b1
= breakpoint_chain
;
4356 breakpoint_chain
= b
;
4366 /* Initialize loc->function_name. */
4368 set_breakpoint_location_function (struct bp_location
*loc
)
4370 if (loc
->owner
->type
== bp_breakpoint
4371 || loc
->owner
->type
== bp_hardware_breakpoint
)
4373 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4375 if (loc
->function_name
)
4376 loc
->function_name
= xstrdup (loc
->function_name
);
4380 /* set_raw_breakpoint is a low level routine for allocating and
4381 partially initializing a breakpoint of type BPTYPE. The newly
4382 created breakpoint's address, section, source file name, and line
4383 number are provided by SAL. The newly created and partially
4384 initialized breakpoint is added to the breakpoint chain and
4385 is also returned as the value of this function.
4387 It is expected that the caller will complete the initialization of
4388 the newly created breakpoint struct as well as output any status
4389 information regarding the creation of a new breakpoint. In
4390 particular, set_raw_breakpoint does NOT set the breakpoint
4391 number! Care should be taken to not allow an error to occur
4392 prior to completing the initialization of the breakpoint. If this
4393 should happen, a bogus breakpoint will be left on the chain. */
4396 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4398 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4399 CORE_ADDR adjusted_address
;
4401 /* Adjust the breakpoint's address prior to allocating a location.
4402 Once we call allocate_bp_location(), that mostly uninitialized
4403 location will be placed on the location chain. Adjustment of the
4404 breakpoint may cause target_read_memory() to be called and we do
4405 not want its scan of the location chain to find a breakpoint and
4406 location that's only been partially initialized. */
4407 adjusted_address
= adjust_breakpoint_address (sal
.pc
, bptype
);
4409 b
->loc
= allocate_bp_location (b
, bptype
);
4410 b
->loc
->requested_address
= sal
.pc
;
4411 b
->loc
->address
= adjusted_address
;
4413 if (sal
.symtab
== NULL
)
4414 b
->source_file
= NULL
;
4416 b
->source_file
= savestring (sal
.symtab
->filename
,
4417 strlen (sal
.symtab
->filename
));
4418 b
->loc
->section
= sal
.section
;
4419 b
->line_number
= sal
.line
;
4421 set_breakpoint_location_function (b
->loc
);
4423 breakpoints_changed ();
4429 /* Note that the breakpoint object B describes a permanent breakpoint
4430 instruction, hard-wired into the inferior's code. */
4432 make_breakpoint_permanent (struct breakpoint
*b
)
4434 struct bp_location
*bl
;
4435 b
->enable_state
= bp_permanent
;
4437 /* By definition, permanent breakpoints are already present in the code.
4438 Mark all locations as inserted. For now, make_breakpoint_permanent
4439 is called in just one place, so it's hard to say if it's reasonable
4440 to have permanent breakpoint with multiple locations or not,
4441 but it's easy to implmement. */
4442 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4446 static struct breakpoint
*
4447 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4449 static int internal_breakpoint_number
= -1;
4450 struct symtab_and_line sal
;
4451 struct breakpoint
*b
;
4453 init_sal (&sal
); /* initialize to zeroes */
4456 sal
.section
= find_pc_overlay (sal
.pc
);
4458 b
= set_raw_breakpoint (sal
, type
);
4459 b
->number
= internal_breakpoint_number
--;
4460 b
->disposition
= disp_donttouch
;
4467 create_longjmp_breakpoint (char *func_name
)
4469 struct breakpoint
*b
;
4470 struct minimal_symbol
*m
;
4472 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4474 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4475 update_global_location_list (1);
4478 /* Call this routine when stepping and nexting to enable a breakpoint
4479 if we do a longjmp(). When we hit that breakpoint, call
4480 set_longjmp_resume_breakpoint() to figure out where we are going. */
4483 set_longjmp_breakpoint (void)
4485 struct breakpoint
*b
;
4487 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4489 create_longjmp_breakpoint ("longjmp");
4490 create_longjmp_breakpoint ("_longjmp");
4491 create_longjmp_breakpoint ("siglongjmp");
4492 create_longjmp_breakpoint ("_siglongjmp");
4496 /* Delete all longjmp breakpoints from THREAD. */
4498 delete_longjmp_breakpoint (int thread
)
4500 struct breakpoint
*b
, *temp
;
4502 ALL_BREAKPOINTS_SAFE (b
, temp
)
4503 if (b
->type
== bp_longjmp
)
4505 if (b
->thread
== thread
)
4506 delete_breakpoint (b
);
4511 create_overlay_event_breakpoint (char *func_name
)
4513 struct breakpoint
*b
;
4514 struct minimal_symbol
*m
;
4516 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4519 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4521 b
->addr_string
= xstrdup (func_name
);
4523 if (overlay_debugging
== ovly_auto
)
4525 b
->enable_state
= bp_enabled
;
4526 overlay_events_enabled
= 1;
4530 b
->enable_state
= bp_disabled
;
4531 overlay_events_enabled
= 0;
4533 update_global_location_list (1);
4537 enable_overlay_breakpoints (void)
4539 struct breakpoint
*b
;
4542 if (b
->type
== bp_overlay_event
)
4544 b
->enable_state
= bp_enabled
;
4545 update_global_location_list (1);
4546 overlay_events_enabled
= 1;
4551 disable_overlay_breakpoints (void)
4553 struct breakpoint
*b
;
4556 if (b
->type
== bp_overlay_event
)
4558 b
->enable_state
= bp_disabled
;
4559 update_global_location_list (0);
4560 overlay_events_enabled
= 0;
4565 create_thread_event_breakpoint (CORE_ADDR address
)
4567 struct breakpoint
*b
;
4569 b
= create_internal_breakpoint (address
, bp_thread_event
);
4571 b
->enable_state
= bp_enabled
;
4572 /* addr_string has to be used or breakpoint_re_set will delete me. */
4573 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4575 update_global_location_list_nothrow (1);
4581 remove_thread_event_breakpoints (void)
4583 struct breakpoint
*b
, *temp
;
4585 ALL_BREAKPOINTS_SAFE (b
, temp
)
4586 if (b
->type
== bp_thread_event
)
4587 delete_breakpoint (b
);
4590 struct captured_parse_breakpoint_args
4593 struct symtabs_and_lines
*sals_p
;
4594 char ***addr_string_p
;
4598 struct lang_and_radix
4606 remove_solib_event_breakpoints (void)
4608 struct breakpoint
*b
, *temp
;
4610 ALL_BREAKPOINTS_SAFE (b
, temp
)
4611 if (b
->type
== bp_shlib_event
)
4612 delete_breakpoint (b
);
4616 create_solib_event_breakpoint (CORE_ADDR address
)
4618 struct breakpoint
*b
;
4620 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4621 update_global_location_list_nothrow (1);
4625 /* Disable any breakpoints that are on code in shared libraries. Only
4626 apply to enabled breakpoints, disabled ones can just stay disabled. */
4629 disable_breakpoints_in_shlibs (void)
4631 struct bp_location
*loc
;
4632 int disabled_shlib_breaks
= 0;
4634 ALL_BP_LOCATIONS (loc
)
4636 struct breakpoint
*b
= loc
->owner
;
4637 /* We apply the check to all breakpoints, including disabled
4638 for those with loc->duplicate set. This is so that when breakpoint
4639 becomes enabled, or the duplicate is removed, gdb will try to insert
4640 all breakpoints. If we don't set shlib_disabled here, we'll try
4641 to insert those breakpoints and fail. */
4642 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4643 && !loc
->shlib_disabled
4645 && PC_SOLIB (loc
->address
)
4647 && solib_address (loc
->address
)
4651 loc
->shlib_disabled
= 1;
4656 /* Disable any breakpoints that are in in an unloaded shared library. Only
4657 apply to enabled breakpoints, disabled ones can just stay disabled. */
4660 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4662 struct bp_location
*loc
;
4663 int disabled_shlib_breaks
= 0;
4665 ALL_BP_LOCATIONS (loc
)
4667 struct breakpoint
*b
= loc
->owner
;
4668 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4669 || loc
->loc_type
== bp_loc_software_breakpoint
)
4670 && !loc
->shlib_disabled
)
4673 char *so_name
= PC_SOLIB (loc
->address
);
4675 char *so_name
= solib_address (loc
->address
);
4677 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4679 loc
->shlib_disabled
= 1;
4680 /* At this point, we cannot rely on remove_breakpoint
4681 succeeding so we must mark the breakpoint as not inserted
4682 to prevent future errors occurring in remove_breakpoints. */
4684 if (!disabled_shlib_breaks
)
4686 target_terminal_ours_for_output ();
4687 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4690 disabled_shlib_breaks
= 1;
4697 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4698 enum bptype bp_kind
)
4700 struct symtab_and_line sal
;
4701 struct breakpoint
*b
;
4702 int thread
= -1; /* All threads. */
4709 b
= set_raw_breakpoint (sal
, bp_kind
);
4710 set_breakpoint_count (breakpoint_count
+ 1);
4711 b
->number
= breakpoint_count
;
4712 b
->cond_string
= (cond_string
== NULL
) ?
4713 NULL
: savestring (cond_string
, strlen (cond_string
));
4715 b
->addr_string
= NULL
;
4716 b
->enable_state
= bp_enabled
;
4717 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4718 b
->forked_inferior_pid
= null_ptid
;
4719 update_global_location_list (1);
4726 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4728 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4732 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4734 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4738 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4740 struct symtab_and_line sal
;
4741 struct breakpoint
*b
;
4742 int thread
= -1; /* All threads. */
4749 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4750 set_breakpoint_count (breakpoint_count
+ 1);
4751 b
->number
= breakpoint_count
;
4752 b
->cond_string
= (cond_string
== NULL
) ?
4753 NULL
: savestring (cond_string
, strlen (cond_string
));
4755 b
->addr_string
= NULL
;
4756 b
->enable_state
= bp_enabled
;
4757 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4758 update_global_location_list (1);
4764 hw_breakpoint_used_count (void)
4766 struct breakpoint
*b
;
4771 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4779 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4781 struct breakpoint
*b
;
4784 *other_type_used
= 0;
4787 if (breakpoint_enabled (b
))
4789 if (b
->type
== type
)
4791 else if ((b
->type
== bp_hardware_watchpoint
||
4792 b
->type
== bp_read_watchpoint
||
4793 b
->type
== bp_access_watchpoint
))
4794 *other_type_used
= 1;
4801 disable_watchpoints_before_interactive_call_start (void)
4803 struct breakpoint
*b
;
4807 if (((b
->type
== bp_watchpoint
)
4808 || (b
->type
== bp_hardware_watchpoint
)
4809 || (b
->type
== bp_read_watchpoint
)
4810 || (b
->type
== bp_access_watchpoint
))
4811 && breakpoint_enabled (b
))
4813 b
->enable_state
= bp_call_disabled
;
4814 update_global_location_list (0);
4820 enable_watchpoints_after_interactive_call_stop (void)
4822 struct breakpoint
*b
;
4826 if (((b
->type
== bp_watchpoint
)
4827 || (b
->type
== bp_hardware_watchpoint
)
4828 || (b
->type
== bp_read_watchpoint
)
4829 || (b
->type
== bp_access_watchpoint
))
4830 && (b
->enable_state
== bp_call_disabled
))
4832 b
->enable_state
= bp_enabled
;
4833 update_global_location_list (1);
4839 /* Set a breakpoint that will evaporate an end of command
4840 at address specified by SAL.
4841 Restrict it to frame FRAME if FRAME is nonzero. */
4844 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4847 struct breakpoint
*b
;
4848 b
= set_raw_breakpoint (sal
, type
);
4849 b
->enable_state
= bp_enabled
;
4850 b
->disposition
= disp_donttouch
;
4851 b
->frame_id
= frame_id
;
4853 /* If we're debugging a multi-threaded program, then we
4854 want momentary breakpoints to be active in only a
4855 single thread of control. */
4856 if (in_thread_list (inferior_ptid
))
4857 b
->thread
= pid_to_thread_id (inferior_ptid
);
4859 update_global_location_list_nothrow (1);
4865 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
4867 struct symtab_and_line sal
;
4869 sal
= find_pc_line (pc
, 0);
4871 sal
.section
= find_pc_overlay (pc
);
4872 sal
.explicit_pc
= 1;
4874 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
4878 /* Tell the user we have just set a breakpoint B. */
4881 mention (struct breakpoint
*b
)
4884 struct cleanup
*old_chain
, *ui_out_chain
;
4885 struct ui_stream
*stb
;
4887 stb
= ui_out_stream_new (uiout
);
4888 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4890 /* FIXME: This is misplaced; mention() is called by things (like
4891 hitting a watchpoint) other than breakpoint creation. It should
4892 be possible to clean this up and at the same time replace the
4893 random calls to breakpoint_changed with this hook. */
4894 observer_notify_breakpoint_created (b
->number
);
4896 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4897 b
->ops
->print_mention (b
);
4902 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4905 ui_out_text (uiout
, "Watchpoint ");
4906 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4907 ui_out_field_int (uiout
, "number", b
->number
);
4908 ui_out_text (uiout
, ": ");
4909 print_expression (b
->exp
, stb
->stream
);
4910 ui_out_field_stream (uiout
, "exp", stb
);
4911 do_cleanups (ui_out_chain
);
4913 case bp_hardware_watchpoint
:
4914 ui_out_text (uiout
, "Hardware watchpoint ");
4915 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4916 ui_out_field_int (uiout
, "number", b
->number
);
4917 ui_out_text (uiout
, ": ");
4918 print_expression (b
->exp
, stb
->stream
);
4919 ui_out_field_stream (uiout
, "exp", stb
);
4920 do_cleanups (ui_out_chain
);
4922 case bp_read_watchpoint
:
4923 ui_out_text (uiout
, "Hardware read watchpoint ");
4924 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4925 ui_out_field_int (uiout
, "number", b
->number
);
4926 ui_out_text (uiout
, ": ");
4927 print_expression (b
->exp
, stb
->stream
);
4928 ui_out_field_stream (uiout
, "exp", stb
);
4929 do_cleanups (ui_out_chain
);
4931 case bp_access_watchpoint
:
4932 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4933 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4934 ui_out_field_int (uiout
, "number", b
->number
);
4935 ui_out_text (uiout
, ": ");
4936 print_expression (b
->exp
, stb
->stream
);
4937 ui_out_field_stream (uiout
, "exp", stb
);
4938 do_cleanups (ui_out_chain
);
4941 if (ui_out_is_mi_like_p (uiout
))
4946 if (b
->disposition
== disp_del
)
4947 printf_filtered (_("Temporary breakpoint"));
4949 printf_filtered (_("Breakpoint"));
4950 printf_filtered (_(" %d"), b
->number
);
4953 case bp_hardware_breakpoint
:
4954 if (ui_out_is_mi_like_p (uiout
))
4959 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4963 case bp_catch_unload
:
4964 printf_filtered (_("Catchpoint %d (%s %s)"),
4966 (b
->type
== bp_catch_load
) ? "load" : "unload",
4967 (b
->dll_pathname
!= NULL
) ?
4968 b
->dll_pathname
: "<any library>");
4971 case bp_catch_vfork
:
4972 printf_filtered (_("Catchpoint %d (%s)"),
4974 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4977 printf_filtered (_("Catchpoint %d (exec)"),
4984 case bp_longjmp_resume
:
4985 case bp_step_resume
:
4987 case bp_watchpoint_scope
:
4988 case bp_shlib_event
:
4989 case bp_thread_event
:
4990 case bp_overlay_event
:
4996 /* i18n: cagney/2005-02-11: Below needs to be merged into a
5000 printf_filtered (_(" (%s) pending."), b
->addr_string
);
5004 if (addressprint
|| b
->source_file
== NULL
)
5006 printf_filtered (" at ");
5007 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5010 printf_filtered (": file %s, line %d.",
5011 b
->source_file
, b
->line_number
);
5015 struct bp_location
*loc
= b
->loc
;
5017 for (; loc
; loc
= loc
->next
)
5019 printf_filtered (" (%d locations)", n
);
5024 do_cleanups (old_chain
);
5025 if (ui_out_is_mi_like_p (uiout
))
5027 printf_filtered ("\n");
5031 static struct bp_location
*
5032 add_location_to_breakpoint (struct breakpoint
*b
, enum bptype bptype
,
5033 const struct symtab_and_line
*sal
)
5035 struct bp_location
*loc
, **tmp
;
5037 loc
= allocate_bp_location (b
, bptype
);
5038 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5041 loc
->requested_address
= sal
->pc
;
5042 loc
->address
= adjust_breakpoint_address (loc
->requested_address
,
5044 loc
->section
= sal
->section
;
5046 set_breakpoint_location_function (loc
);
5050 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5051 as textual description of the location, and COND_STRING
5052 as condition expression. */
5055 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5057 enum bptype type
, enum bpdisp disposition
,
5058 int thread
, int ignore_count
,
5059 struct breakpoint_ops
*ops
, int from_tty
)
5061 struct breakpoint
*b
= NULL
;
5064 if (type
== bp_hardware_breakpoint
)
5066 int i
= hw_breakpoint_used_count ();
5067 int target_resources_ok
=
5068 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5070 if (target_resources_ok
== 0)
5071 error (_("No hardware breakpoint support in the target."));
5072 else if (target_resources_ok
< 0)
5073 error (_("Hardware breakpoints used exceeds limit."));
5076 for (i
= 0; i
< sals
.nelts
; ++i
)
5078 struct symtab_and_line sal
= sals
.sals
[i
];
5079 struct bp_location
*loc
;
5082 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5086 b
= set_raw_breakpoint (sal
, type
);
5087 set_breakpoint_count (breakpoint_count
+ 1);
5088 b
->number
= breakpoint_count
;
5091 b
->cond_string
= cond_string
;
5092 b
->ignore_count
= ignore_count
;
5093 b
->enable_state
= bp_enabled
;
5094 b
->disposition
= disposition
;
5100 loc
= add_location_to_breakpoint (b
, type
, &sal
);
5105 char *arg
= b
->cond_string
;
5106 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5108 error (_("Garbage %s follows condition"), arg
);
5113 b
->addr_string
= addr_string
;
5115 /* addr_string has to be used or breakpoint_re_set will delete
5117 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5123 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5124 elements to fill the void space. */
5125 static void remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5127 int i
= index_to_remove
+1;
5128 int last_index
= sal
->nelts
-1;
5130 for (;i
<= last_index
; ++i
)
5131 sal
->sals
[i
-1] = sal
->sals
[i
];
5136 /* If appropriate, obtains all sals that correspond
5137 to the same file and line as SAL. This is done
5138 only if SAL does not have explicit PC and has
5139 line and file information. If we got just a single
5140 expanded sal, return the original.
5142 Otherwise, if SAL.explicit_line is not set, filter out
5143 all sals for which the name of enclosing function
5144 is different from SAL. This makes sure that if we have
5145 breakpoint originally set in template instantiation, say
5146 foo<int>(), we won't expand SAL to locations at the same
5147 line in all existing instantiations of 'foo'.
5150 struct symtabs_and_lines
5151 expand_line_sal_maybe (struct symtab_and_line sal
)
5153 struct symtabs_and_lines expanded
;
5154 CORE_ADDR original_pc
= sal
.pc
;
5155 char *original_function
= NULL
;
5159 /* If we have explicit pc, don't expand.
5160 If we have no line number, we can't expand. */
5161 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5164 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5165 expanded
.sals
[0] = sal
;
5170 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5172 expanded
= expand_line_sal (sal
);
5173 if (expanded
.nelts
== 1)
5175 /* We had one sal, we got one sal. Without futher
5176 processing, just return the original sal. */
5177 xfree (expanded
.sals
);
5179 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5180 sal
.pc
= original_pc
;
5181 expanded
.sals
[0] = sal
;
5185 if (!sal
.explicit_line
)
5187 CORE_ADDR func_addr
, func_end
;
5188 for (i
= 0; i
< expanded
.nelts
; ++i
)
5190 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5191 char *this_function
;
5192 if (find_pc_partial_function (pc
, &this_function
,
5193 &func_addr
, &func_end
))
5195 if (this_function
&&
5196 strcmp (this_function
, original_function
) != 0)
5198 remove_sal (&expanded
, i
);
5201 else if (func_addr
== pc
)
5203 /* We're at beginning of a function, and should
5205 struct symbol
*sym
= find_pc_function (pc
);
5207 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5210 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5217 if (expanded
.nelts
<= 1)
5219 /* This is un ugly workaround. If we get zero
5220 expanded sals then something is really wrong.
5221 Fix that by returnign the original sal. */
5222 xfree (expanded
.sals
);
5224 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5225 sal
.pc
= original_pc
;
5226 expanded
.sals
[0] = sal
;
5233 for (i
= 0; i
< expanded
.nelts
; ++i
)
5234 if (expanded
.sals
[i
].pc
== original_pc
)
5245 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5246 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5247 value. COND_STRING, if not NULL, specified the condition to be
5248 used for all breakpoints. Essentially the only case where
5249 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5250 function. In that case, it's still not possible to specify
5251 separate conditions for different overloaded functions, so
5252 we take just a single condition string.
5254 NOTE: If the function succeeds, the caller is expected to cleanup
5255 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5256 array contents). If the function fails (error() is called), the
5257 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5258 COND and SALS arrays and each of those arrays contents. */
5261 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5263 enum bptype type
, enum bpdisp disposition
,
5264 int thread
, int ignore_count
,
5265 struct breakpoint_ops
*ops
, int from_tty
)
5268 for (i
= 0; i
< sals
.nelts
; ++i
)
5270 struct symtabs_and_lines expanded
=
5271 expand_line_sal_maybe (sals
.sals
[i
]);
5273 create_breakpoint (expanded
, addr_string
[i
],
5274 cond_string
, type
, disposition
,
5275 thread
, ignore_count
, ops
, from_tty
);
5278 update_global_location_list (1);
5281 /* Parse ARG which is assumed to be a SAL specification possibly
5282 followed by conditionals. On return, SALS contains an array of SAL
5283 addresses found. ADDR_STRING contains a vector of (canonical)
5284 address strings. ARG points to the end of the SAL. */
5287 parse_breakpoint_sals (char **address
,
5288 struct symtabs_and_lines
*sals
,
5289 char ***addr_string
,
5292 char *addr_start
= *address
;
5293 *addr_string
= NULL
;
5294 /* If no arg given, or if first arg is 'if ', use the default
5296 if ((*address
) == NULL
5297 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5299 if (default_breakpoint_valid
)
5301 struct symtab_and_line sal
;
5302 init_sal (&sal
); /* initialize to zeroes */
5303 sals
->sals
= (struct symtab_and_line
*)
5304 xmalloc (sizeof (struct symtab_and_line
));
5305 sal
.pc
= default_breakpoint_address
;
5306 sal
.line
= default_breakpoint_line
;
5307 sal
.symtab
= default_breakpoint_symtab
;
5308 sal
.section
= find_pc_overlay (sal
.pc
);
5309 sals
->sals
[0] = sal
;
5313 error (_("No default breakpoint address now."));
5317 /* Force almost all breakpoints to be in terms of the
5318 current_source_symtab (which is decode_line_1's default). This
5319 should produce the results we want almost all of the time while
5320 leaving default_breakpoint_* alone.
5321 ObjC: However, don't match an Objective-C method name which
5322 may have a '+' or '-' succeeded by a '[' */
5324 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5326 if (default_breakpoint_valid
5328 || ((strchr ("+-", (*address
)[0]) != NULL
)
5329 && ((*address
)[1] != '['))))
5330 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5331 default_breakpoint_line
, addr_string
,
5334 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5335 addr_string
, not_found_ptr
);
5337 /* For any SAL that didn't have a canonical string, fill one in. */
5338 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5339 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5340 if (addr_start
!= (*address
))
5343 for (i
= 0; i
< sals
->nelts
; i
++)
5345 /* Add the string if not present. */
5346 if ((*addr_string
)[i
] == NULL
)
5347 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5353 /* Convert each SAL into a real PC. Verify that the PC can be
5354 inserted as a breakpoint. If it can't throw an error. */
5357 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5361 for (i
= 0; i
< sals
->nelts
; i
++)
5362 resolve_sal_pc (&sals
->sals
[i
]);
5366 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5368 struct captured_parse_breakpoint_args
*args
= data
;
5370 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5371 args
->not_found_ptr
);
5374 /* Given TOK, a string specification of condition and thread, as
5375 accepted by the 'break' command, extract the condition
5376 string and thread number and set *COND_STRING and *THREAD.
5377 PC identifies the context at which the condition should be parsed.
5378 If no condition is found, *COND_STRING is set to NULL.
5379 If no thread is found, *THREAD is set to -1. */
5381 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5382 char **cond_string
, int *thread
)
5384 *cond_string
= NULL
;
5390 char *cond_start
= NULL
;
5391 char *cond_end
= NULL
;
5392 while (*tok
== ' ' || *tok
== '\t')
5397 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5400 toklen
= end_tok
- tok
;
5402 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5404 tok
= cond_start
= end_tok
+ 1;
5405 parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5407 *cond_string
= savestring (cond_start
,
5408 cond_end
- cond_start
);
5410 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5416 *thread
= strtol (tok
, &tok
, 0);
5418 error (_("Junk after thread keyword."));
5419 if (!valid_thread_id (*thread
))
5420 error (_("Unknown thread %d."), *thread
);
5423 error (_("Junk at end of arguments."));
5427 /* Set a breakpoint. This function is shared between
5428 CLI and MI functions for setting a breakpoint.
5429 This function has two major modes of operations,
5430 selected by the PARSE_CONDITION_AND_THREAD parameter.
5431 If non-zero, the function will parse arg, extracting
5432 breakpoint location, address and thread. Otherwise,
5433 ARG is just the location of breakpoint, with condition
5434 and thread specified by the COND_STRING and THREAD
5438 break_command_really (char *arg
, char *cond_string
, int thread
,
5439 int parse_condition_and_thread
,
5440 int tempflag
, int hardwareflag
,
5442 enum auto_boolean pending_break_support
,
5443 struct breakpoint_ops
*ops
,
5446 struct gdb_exception e
;
5447 struct symtabs_and_lines sals
;
5448 struct symtab_and_line pending_sal
;
5451 char *addr_start
= arg
;
5453 struct cleanup
*old_chain
;
5454 struct cleanup
*breakpoint_chain
= NULL
;
5455 struct captured_parse_breakpoint_args parse_args
;
5464 parse_args
.arg_p
= &arg
;
5465 parse_args
.sals_p
= &sals
;
5466 parse_args
.addr_string_p
= &addr_string
;
5467 parse_args
.not_found_ptr
= ¬_found
;
5469 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5470 &parse_args
, RETURN_MASK_ALL
);
5472 /* If caller is interested in rc value from parse, set value. */
5476 throw_exception (e
);
5480 case NOT_FOUND_ERROR
:
5482 /* If pending breakpoint support is turned off, throw
5485 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5486 throw_exception (e
);
5488 exception_print (gdb_stderr
, e
);
5490 /* If pending breakpoint support is auto query and the user
5491 selects no, then simply return the error code. */
5492 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5493 !nquery ("Make breakpoint pending on future shared library load? "))
5496 /* At this point, either the user was queried about setting
5497 a pending breakpoint and selected yes, or pending
5498 breakpoint behavior is on and thus a pending breakpoint
5499 is defaulted on behalf of the user. */
5500 copy_arg
= xstrdup (addr_start
);
5501 addr_string
= ©_arg
;
5503 sals
.sals
= &pending_sal
;
5508 throw_exception (e
);
5515 /* Create a chain of things that always need to be cleaned up. */
5516 old_chain
= make_cleanup (null_cleanup
, 0);
5520 /* Make sure that all storage allocated to SALS gets freed. */
5521 make_cleanup (xfree
, sals
.sals
);
5523 /* Cleanup the addr_string array but not its contents. */
5524 make_cleanup (xfree
, addr_string
);
5527 /* ----------------------------- SNIP -----------------------------
5528 Anything added to the cleanup chain beyond this point is assumed
5529 to be part of a breakpoint. If the breakpoint create succeeds
5530 then the memory is not reclaimed. */
5531 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5533 /* Mark the contents of the addr_string for cleanup. These go on
5534 the breakpoint_chain and only occure if the breakpoint create
5536 for (i
= 0; i
< sals
.nelts
; i
++)
5538 if (addr_string
[i
] != NULL
)
5539 make_cleanup (xfree
, addr_string
[i
]);
5542 /* Resolve all line numbers to PC's and verify that the addresses
5543 are ok for the target. */
5545 breakpoint_sals_to_pc (&sals
, addr_start
);
5547 /* Verify that condition can be parsed, before setting any
5548 breakpoints. Allocate a separate condition expression for each
5552 if (parse_condition_and_thread
)
5554 /* Here we only parse 'arg' to separate condition
5555 from thread number, so parsing in context of first
5556 sal is OK. When setting the breakpoint we'll
5557 re-parse it in context of each sal. */
5560 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5562 make_cleanup (xfree
, cond_string
);
5566 /* Create a private copy of condition string. */
5569 cond_string
= xstrdup (cond_string
);
5570 make_cleanup (xfree
, cond_string
);
5573 create_breakpoints (sals
, addr_string
, cond_string
,
5574 hardwareflag
? bp_hardware_breakpoint
5576 tempflag
? disp_del
: disp_donttouch
,
5577 thread
, ignore_count
, ops
, from_tty
);
5581 struct symtab_and_line sal
= {0};
5582 struct breakpoint
*b
;
5584 make_cleanup (xfree
, copy_arg
);
5586 b
= set_raw_breakpoint_without_location (hardwareflag
5587 ? bp_hardware_breakpoint
5589 set_breakpoint_count (breakpoint_count
+ 1);
5590 b
->number
= breakpoint_count
;
5592 b
->addr_string
= addr_string
[0];
5593 b
->cond_string
= NULL
;
5594 b
->ignore_count
= ignore_count
;
5595 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5596 b
->condition_not_parsed
= 1;
5599 update_global_location_list (1);
5604 warning (_("Multiple breakpoints were set.\n"
5605 "Use the \"delete\" command to delete unwanted breakpoints."));
5606 /* That's it. Discard the cleanups for data inserted into the
5608 discard_cleanups (breakpoint_chain
);
5609 /* But cleanup everything else. */
5610 do_cleanups (old_chain
);
5613 /* Set a breakpoint.
5614 ARG is a string describing breakpoint address,
5615 condition, and thread.
5616 FLAG specifies if a breakpoint is hardware on,
5617 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5621 break_command_1 (char *arg
, int flag
, int from_tty
)
5623 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5624 int tempflag
= flag
& BP_TEMPFLAG
;
5626 break_command_really (arg
,
5627 NULL
, 0, 1 /* parse arg */,
5628 tempflag
, hardwareflag
,
5629 0 /* Ignore count */,
5630 pending_break_support
,
5631 NULL
/* breakpoint_ops */,
5637 set_breakpoint (char *address
, char *condition
,
5638 int hardwareflag
, int tempflag
,
5639 int thread
, int ignore_count
,
5642 break_command_really (address
, condition
, thread
,
5643 0 /* condition and thread are valid. */,
5644 tempflag
, hardwareflag
,
5647 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5651 /* Adjust SAL to the first instruction past the function prologue.
5652 The end of the prologue is determined using the line table from
5653 the debugging information.
5655 If SAL is already past the prologue, then do nothing. */
5658 skip_prologue_sal (struct symtab_and_line
*sal
)
5660 struct symbol
*sym
= find_pc_function (sal
->pc
);
5661 struct symtab_and_line start_sal
;
5666 start_sal
= find_function_start_sal (sym
, 1);
5667 if (sal
->pc
< start_sal
.pc
)
5671 /* Helper function for break_command_1 and disassemble_command. */
5674 resolve_sal_pc (struct symtab_and_line
*sal
)
5678 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5680 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5681 error (_("No line %d in file \"%s\"."),
5682 sal
->line
, sal
->symtab
->filename
);
5685 /* If this SAL corresponds to a breakpoint inserted using
5686 a line number, then skip the function prologue if necessary. */
5687 if (sal
->explicit_line
)
5688 skip_prologue_sal (sal
);
5691 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5693 struct blockvector
*bv
;
5697 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5700 sym
= block_linkage_function (b
);
5703 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5704 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5708 /* It really is worthwhile to have the section, so we'll just
5709 have to look harder. This case can be executed if we have
5710 line numbers but no functions (as can happen in assembly
5713 struct minimal_symbol
*msym
;
5715 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5717 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5724 break_command (char *arg
, int from_tty
)
5726 break_command_1 (arg
, 0, from_tty
);
5730 tbreak_command (char *arg
, int from_tty
)
5732 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5736 hbreak_command (char *arg
, int from_tty
)
5738 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5742 thbreak_command (char *arg
, int from_tty
)
5744 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5748 stop_command (char *arg
, int from_tty
)
5750 printf_filtered (_("Specify the type of breakpoint to set.\n\
5751 Usage: stop in <function | address>\n\
5752 stop at <line>\n"));
5756 stopin_command (char *arg
, int from_tty
)
5760 if (arg
== (char *) NULL
)
5762 else if (*arg
!= '*')
5767 /* look for a ':'. If this is a line number specification, then
5768 say it is bad, otherwise, it should be an address or
5769 function/method name */
5770 while (*argptr
&& !hasColon
)
5772 hasColon
= (*argptr
== ':');
5777 badInput
= (*argptr
!= ':'); /* Not a class::method */
5779 badInput
= isdigit (*arg
); /* a simple line number */
5783 printf_filtered (_("Usage: stop in <function | address>\n"));
5785 break_command_1 (arg
, 0, from_tty
);
5789 stopat_command (char *arg
, int from_tty
)
5793 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5800 /* look for a ':'. If there is a '::' then get out, otherwise
5801 it is probably a line number. */
5802 while (*argptr
&& !hasColon
)
5804 hasColon
= (*argptr
== ':');
5809 badInput
= (*argptr
== ':'); /* we have class::method */
5811 badInput
= !isdigit (*arg
); /* not a line number */
5815 printf_filtered (_("Usage: stop at <line>\n"));
5817 break_command_1 (arg
, 0, from_tty
);
5820 /* accessflag: hw_write: watch write,
5821 hw_read: watch read,
5822 hw_access: watch access (read or write) */
5824 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5826 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
5827 struct symtab_and_line sal
;
5828 struct expression
*exp
;
5829 struct block
*exp_valid_block
;
5830 struct value
*val
, *mark
;
5831 struct frame_info
*frame
;
5832 struct frame_info
*prev_frame
= NULL
;
5833 char *exp_start
= NULL
;
5834 char *exp_end
= NULL
;
5835 char *tok
, *id_tok_start
, *end_tok
;
5837 char *cond_start
= NULL
;
5838 char *cond_end
= NULL
;
5839 struct expression
*cond
= NULL
;
5840 int i
, other_type_used
, target_resources_ok
= 0;
5841 enum bptype bp_type
;
5845 init_sal (&sal
); /* initialize to zeroes */
5847 /* Make sure that we actually have parameters to parse. */
5848 if (arg
!= NULL
&& arg
[0] != '\0')
5850 toklen
= strlen (arg
); /* Size of argument list. */
5852 /* Points tok to the end of the argument list. */
5853 tok
= arg
+ toklen
- 1;
5855 /* Go backwards in the parameters list. Skip the last parameter.
5856 If we're expecting a 'thread <thread_num>' parameter, this should
5857 be the thread identifier. */
5858 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5860 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5863 /* Points end_tok to the beginning of the last token. */
5864 id_tok_start
= tok
+ 1;
5866 /* Go backwards in the parameters list. Skip one more parameter.
5867 If we're expecting a 'thread <thread_num>' parameter, we should
5868 reach a "thread" token. */
5869 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5874 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5877 /* Move the pointer forward to skip the whitespace and
5878 calculate the length of the token. */
5880 toklen
= end_tok
- tok
;
5882 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5884 /* At this point we've found a "thread" token, which means
5885 the user is trying to set a watchpoint that triggers
5886 only in a specific thread. */
5889 /* Extract the thread ID from the next token. */
5890 thread
= strtol (id_tok_start
, &endp
, 0);
5892 /* Check if the user provided a valid numeric value for the
5894 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
5895 error (_("Invalid thread ID specification %s."), id_tok_start
);
5897 /* Check if the thread actually exists. */
5898 if (!valid_thread_id (thread
))
5899 error (_("Unknown thread %d."), thread
);
5901 /* Truncate the string and get rid of the thread <thread_num>
5902 parameter before the parameter list is parsed by the
5903 evaluate_expression() function. */
5908 /* Parse the rest of the arguments. */
5909 innermost_block
= NULL
;
5911 exp
= parse_exp_1 (&arg
, 0, 0);
5913 exp_valid_block
= innermost_block
;
5914 mark
= value_mark ();
5915 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
5917 release_value (val
);
5920 while (*tok
== ' ' || *tok
== '\t')
5924 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5927 toklen
= end_tok
- tok
;
5928 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5930 tok
= cond_start
= end_tok
+ 1;
5931 cond
= parse_exp_1 (&tok
, 0, 0);
5935 error (_("Junk at end of command."));
5937 if (accessflag
== hw_read
)
5938 bp_type
= bp_read_watchpoint
;
5939 else if (accessflag
== hw_access
)
5940 bp_type
= bp_access_watchpoint
;
5942 bp_type
= bp_hardware_watchpoint
;
5944 mem_cnt
= can_use_hardware_watchpoint (val
);
5945 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5946 error (_("Expression cannot be implemented with read/access watchpoint."));
5949 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5950 target_resources_ok
=
5951 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5953 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5954 error (_("Target does not support this type of hardware watchpoint."));
5956 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5957 error (_("Target can only support one kind of HW watchpoint at a time."));
5960 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5961 watchpoint could not be set. */
5962 if (!mem_cnt
|| target_resources_ok
<= 0)
5963 bp_type
= bp_watchpoint
;
5965 frame
= block_innermost_frame (exp_valid_block
);
5967 prev_frame
= get_prev_frame (frame
);
5971 /* If the expression is "local", then set up a "watchpoint scope"
5972 breakpoint at the point where we've left the scope of the watchpoint
5973 expression. Create the scope breakpoint before the watchpoint, so
5974 that we will encounter it first in bpstat_stop_status. */
5975 if (innermost_block
&& prev_frame
)
5977 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5978 bp_watchpoint_scope
);
5980 scope_breakpoint
->enable_state
= bp_enabled
;
5982 /* Automatically delete the breakpoint when it hits. */
5983 scope_breakpoint
->disposition
= disp_del
;
5985 /* Only break in the proper frame (help with recursion). */
5986 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5988 /* Set the address at which we will stop. */
5989 scope_breakpoint
->loc
->requested_address
5990 = get_frame_pc (prev_frame
);
5991 scope_breakpoint
->loc
->address
5992 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
5993 scope_breakpoint
->type
);
5996 /* Now set up the breakpoint. */
5997 b
= set_raw_breakpoint (sal
, bp_type
);
5998 set_breakpoint_count (breakpoint_count
+ 1);
5999 b
->number
= breakpoint_count
;
6001 b
->disposition
= disp_donttouch
;
6003 b
->exp_valid_block
= exp_valid_block
;
6004 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6007 b
->loc
->cond
= cond
;
6009 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6014 b
->watchpoint_frame
= get_frame_id (frame
);
6016 b
->watchpoint_frame
= null_frame_id
;
6018 if (scope_breakpoint
!= NULL
)
6020 /* The scope breakpoint is related to the watchpoint. We will
6021 need to act on them together. */
6022 b
->related_breakpoint
= scope_breakpoint
;
6023 scope_breakpoint
->related_breakpoint
= b
;
6026 value_free_to_mark (mark
);
6028 update_global_location_list (1);
6031 /* Return count of locations need to be watched and can be handled
6032 in hardware. If the watchpoint can not be handled
6033 in hardware return zero. */
6036 can_use_hardware_watchpoint (struct value
*v
)
6038 int found_memory_cnt
= 0;
6039 struct value
*head
= v
;
6041 /* Did the user specifically forbid us to use hardware watchpoints? */
6042 if (!can_use_hw_watchpoints
)
6045 /* Make sure that the value of the expression depends only upon
6046 memory contents, and values computed from them within GDB. If we
6047 find any register references or function calls, we can't use a
6048 hardware watchpoint.
6050 The idea here is that evaluating an expression generates a series
6051 of values, one holding the value of every subexpression. (The
6052 expression a*b+c has five subexpressions: a, b, a*b, c, and
6053 a*b+c.) GDB's values hold almost enough information to establish
6054 the criteria given above --- they identify memory lvalues,
6055 register lvalues, computed values, etcetera. So we can evaluate
6056 the expression, and then scan the chain of values that leaves
6057 behind to decide whether we can detect any possible change to the
6058 expression's final value using only hardware watchpoints.
6060 However, I don't think that the values returned by inferior
6061 function calls are special in any way. So this function may not
6062 notice that an expression involving an inferior function call
6063 can't be watched with hardware watchpoints. FIXME. */
6064 for (; v
; v
= value_next (v
))
6066 if (VALUE_LVAL (v
) == lval_memory
)
6069 /* A lazy memory lvalue is one that GDB never needed to fetch;
6070 we either just used its address (e.g., `a' in `a.b') or
6071 we never needed it at all (e.g., `a' in `a,b'). */
6075 /* Ahh, memory we actually used! Check if we can cover
6076 it with hardware watchpoints. */
6077 struct type
*vtype
= check_typedef (value_type (v
));
6079 /* We only watch structs and arrays if user asked for it
6080 explicitly, never if they just happen to appear in a
6081 middle of some value chain. */
6083 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6084 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6086 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
6087 int len
= TYPE_LENGTH (value_type (v
));
6089 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6096 else if (VALUE_LVAL (v
) != not_lval
6097 && deprecated_value_modifiable (v
) == 0)
6098 return 0; /* ??? What does this represent? */
6099 else if (VALUE_LVAL (v
) == lval_register
)
6100 return 0; /* cannot watch a register with a HW watchpoint */
6103 /* The expression itself looks suitable for using a hardware
6104 watchpoint, but give the target machine a chance to reject it. */
6105 return found_memory_cnt
;
6109 watch_command_wrapper (char *arg
, int from_tty
)
6111 watch_command (arg
, from_tty
);
6115 watch_command (char *arg
, int from_tty
)
6117 watch_command_1 (arg
, hw_write
, from_tty
);
6121 rwatch_command_wrapper (char *arg
, int from_tty
)
6123 rwatch_command (arg
, from_tty
);
6127 rwatch_command (char *arg
, int from_tty
)
6129 watch_command_1 (arg
, hw_read
, from_tty
);
6133 awatch_command_wrapper (char *arg
, int from_tty
)
6135 awatch_command (arg
, from_tty
);
6139 awatch_command (char *arg
, int from_tty
)
6141 watch_command_1 (arg
, hw_access
, from_tty
);
6145 /* Helper routines for the until_command routine in infcmd.c. Here
6146 because it uses the mechanisms of breakpoints. */
6148 struct until_break_command_continuation_args
6150 struct breakpoint
*breakpoint
;
6151 struct breakpoint
*breakpoint2
;
6154 /* This function is called by fetch_inferior_event via the
6155 cmd_continuation pointer, to complete the until command. It takes
6156 care of cleaning up the temporary breakpoints set up by the until
6159 until_break_command_continuation (void *arg
)
6161 struct until_break_command_continuation_args
*a
= arg
;
6163 delete_breakpoint (a
->breakpoint
);
6165 delete_breakpoint (a
->breakpoint2
);
6169 until_break_command (char *arg
, int from_tty
, int anywhere
)
6171 struct symtabs_and_lines sals
;
6172 struct symtab_and_line sal
;
6173 struct frame_info
*frame
= get_selected_frame (NULL
);
6174 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6175 struct breakpoint
*breakpoint
;
6176 struct breakpoint
*breakpoint2
= NULL
;
6177 struct cleanup
*old_chain
;
6179 clear_proceed_status ();
6181 /* Set a breakpoint where the user wants it and at return from
6184 if (default_breakpoint_valid
)
6185 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6186 default_breakpoint_line
, (char ***) NULL
, NULL
);
6188 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6189 0, (char ***) NULL
, NULL
);
6191 if (sals
.nelts
!= 1)
6192 error (_("Couldn't get information on specified line."));
6195 xfree (sals
.sals
); /* malloc'd, so freed */
6198 error (_("Junk at end of arguments."));
6200 resolve_sal_pc (&sal
);
6203 /* If the user told us to continue until a specified location,
6204 we don't specify a frame at which we need to stop. */
6205 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6207 /* Otherwise, specify the current frame, because we want to stop only
6208 at the very same frame. */
6209 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6212 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6214 /* Keep within the current frame, or in frames called by the current
6218 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6219 sal
.pc
= get_frame_pc (prev_frame
);
6220 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6222 make_cleanup_delete_breakpoint (breakpoint2
);
6225 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6227 /* If we are running asynchronously, and proceed call above has actually
6228 managed to start the target, arrange for breakpoints to be
6229 deleted when the target stops. Otherwise, we're already stopped and
6230 delete breakpoints via cleanup chain. */
6232 if (target_can_async_p () && is_running (inferior_ptid
))
6234 struct until_break_command_continuation_args
*args
;
6235 args
= xmalloc (sizeof (*args
));
6237 args
->breakpoint
= breakpoint
;
6238 args
->breakpoint2
= breakpoint2
;
6240 discard_cleanups (old_chain
);
6241 add_continuation (until_break_command_continuation
, args
,
6245 do_cleanups (old_chain
);
6249 ep_skip_leading_whitespace (char **s
)
6251 if ((s
== NULL
) || (*s
== NULL
))
6253 while (isspace (**s
))
6257 /* This function examines a string, and attempts to find a token
6258 that might be an event name in the leading characters. If a
6259 possible match is found, a pointer to the last character of
6260 the token is returned. Else, NULL is returned. */
6263 ep_find_event_name_end (char *arg
)
6266 char *event_name_end
= NULL
;
6268 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6272 /* We break out of the loop when we find a token delimiter.
6273 Basically, we're looking for alphanumerics and underscores;
6274 anything else delimites the token. */
6277 if (!isalnum (*s
) && (*s
!= '_'))
6283 return event_name_end
;
6287 /* This function attempts to parse an optional "if <cond>" clause
6288 from the arg string. If one is not found, it returns NULL.
6290 Else, it returns a pointer to the condition string. (It does not
6291 attempt to evaluate the string against a particular block.) And,
6292 it updates arg to point to the first character following the parsed
6293 if clause in the arg string. */
6296 ep_parse_optional_if_clause (char **arg
)
6300 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6303 /* Skip the "if" keyword. */
6306 /* Skip any extra leading whitespace, and record the start of the
6307 condition string. */
6308 ep_skip_leading_whitespace (arg
);
6311 /* Assume that the condition occupies the remainder of the arg string. */
6312 (*arg
) += strlen (cond_string
);
6317 /* This function attempts to parse an optional filename from the arg
6318 string. If one is not found, it returns NULL.
6320 Else, it returns a pointer to the parsed filename. (This function
6321 makes no attempt to verify that a file of that name exists, or is
6322 accessible.) And, it updates arg to point to the first character
6323 following the parsed filename in the arg string.
6325 Note that clients needing to preserve the returned filename for
6326 future access should copy it to their own buffers. */
6328 ep_parse_optional_filename (char **arg
)
6330 static char filename
[1024];
6335 if ((*arg_p
== '\0') || isspace (*arg_p
))
6353 /* Commands to deal with catching events, such as signals, exceptions,
6354 process start/exit, etc. */
6358 catch_fork
, catch_vfork
6363 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6366 char *cond_string
= NULL
;
6368 ep_skip_leading_whitespace (&arg
);
6370 /* The allowed syntax is:
6372 catch [v]fork if <cond>
6374 First, check if there's an if clause. */
6375 cond_string
= ep_parse_optional_if_clause (&arg
);
6377 if ((*arg
!= '\0') && !isspace (*arg
))
6378 error (_("Junk at end of arguments."));
6380 /* If this target supports it, create a fork or vfork catchpoint
6381 and enable reporting of such events. */
6385 create_fork_event_catchpoint (tempflag
, cond_string
);
6388 create_vfork_event_catchpoint (tempflag
, cond_string
);
6391 error (_("unsupported or unknown fork kind; cannot catch it"));
6397 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6399 char *cond_string
= NULL
;
6401 ep_skip_leading_whitespace (&arg
);
6403 /* The allowed syntax is:
6405 catch exec if <cond>
6407 First, check if there's an if clause. */
6408 cond_string
= ep_parse_optional_if_clause (&arg
);
6410 if ((*arg
!= '\0') && !isspace (*arg
))
6411 error (_("Junk at end of arguments."));
6413 /* If this target supports it, create an exec catchpoint
6414 and enable reporting of such events. */
6415 create_exec_event_catchpoint (tempflag
, cond_string
);
6419 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6421 char *dll_pathname
= NULL
;
6422 char *cond_string
= NULL
;
6424 ep_skip_leading_whitespace (&arg
);
6426 /* The allowed syntax is:
6428 catch load if <cond>
6429 catch load <filename>
6430 catch load <filename> if <cond>
6432 The user is not allowed to specify the <filename> after an
6435 We'll ignore the pathological case of a file named "if".
6437 First, check if there's an if clause. If so, then there
6438 cannot be a filename. */
6439 cond_string
= ep_parse_optional_if_clause (&arg
);
6441 /* If there was an if clause, then there cannot be a filename.
6442 Else, there might be a filename and an if clause. */
6443 if (cond_string
== NULL
)
6445 dll_pathname
= ep_parse_optional_filename (&arg
);
6446 ep_skip_leading_whitespace (&arg
);
6447 cond_string
= ep_parse_optional_if_clause (&arg
);
6450 if ((*arg
!= '\0') && !isspace (*arg
))
6451 error (_("Junk at end of arguments."));
6453 /* Create a load breakpoint that only triggers when a load of
6454 the specified dll (or any dll, if no pathname was specified)
6456 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6457 dll_pathname
, cond_string
);
6461 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6463 char *dll_pathname
= NULL
;
6464 char *cond_string
= NULL
;
6466 ep_skip_leading_whitespace (&arg
);
6468 /* The allowed syntax is:
6470 catch unload if <cond>
6471 catch unload <filename>
6472 catch unload <filename> if <cond>
6474 The user is not allowed to specify the <filename> after an
6477 We'll ignore the pathological case of a file named "if".
6479 First, check if there's an if clause. If so, then there
6480 cannot be a filename. */
6481 cond_string
= ep_parse_optional_if_clause (&arg
);
6483 /* If there was an if clause, then there cannot be a filename.
6484 Else, there might be a filename and an if clause. */
6485 if (cond_string
== NULL
)
6487 dll_pathname
= ep_parse_optional_filename (&arg
);
6488 ep_skip_leading_whitespace (&arg
);
6489 cond_string
= ep_parse_optional_if_clause (&arg
);
6492 if ((*arg
!= '\0') && !isspace (*arg
))
6493 error (_("Junk at end of arguments."));
6495 /* Create an unload breakpoint that only triggers when an unload of
6496 the specified dll (or any dll, if no pathname was specified)
6498 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6499 dll_pathname
, cond_string
);
6502 static enum print_stop_action
6503 print_exception_catchpoint (struct breakpoint
*b
)
6505 int bp_temp
, bp_throw
;
6507 annotate_catchpoint (b
->number
);
6509 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6510 if (b
->loc
->address
!= b
->loc
->requested_address
)
6511 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6514 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6516 bp_temp
? "Temporary catchpoint "
6518 if (!ui_out_is_mi_like_p (uiout
))
6519 ui_out_field_int (uiout
, "bkptno", b
->number
);
6521 bp_throw
? " (exception thrown), "
6522 : " (exception caught), ");
6523 if (ui_out_is_mi_like_p (uiout
))
6525 ui_out_field_string (uiout
, "reason",
6526 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6527 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6528 ui_out_field_int (uiout
, "bkptno", b
->number
);
6530 return PRINT_SRC_AND_LOC
;
6534 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6539 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6540 ui_out_field_string (uiout
, "addr", "<PENDING>");
6542 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6546 *last_addr
= b
->loc
->address
;
6547 if (strstr (b
->addr_string
, "throw") != NULL
)
6548 ui_out_field_string (uiout
, "what", "exception throw");
6550 ui_out_field_string (uiout
, "what", "exception catch");
6554 print_mention_exception_catchpoint (struct breakpoint
*b
)
6559 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6560 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6561 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6562 : _("Catchpoint "));
6563 ui_out_field_int (uiout
, "bkptno", b
->number
);
6564 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6568 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6569 print_exception_catchpoint
,
6570 print_one_exception_catchpoint
,
6571 print_mention_exception_catchpoint
6575 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6576 enum exception_event_kind ex_event
, int from_tty
)
6578 char *trigger_func_name
;
6580 if (ex_event
== EX_EVENT_CATCH
)
6581 trigger_func_name
= "__cxa_begin_catch";
6583 trigger_func_name
= "__cxa_throw";
6585 break_command_really (trigger_func_name
, cond_string
, -1,
6586 0 /* condition and thread are valid. */,
6589 AUTO_BOOLEAN_TRUE
/* pending */,
6590 &gnu_v3_exception_catchpoint_ops
, from_tty
);
6595 /* Deal with "catch catch" and "catch throw" commands */
6598 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6599 int tempflag
, int from_tty
)
6601 char *cond_string
= NULL
;
6602 struct symtab_and_line
*sal
= NULL
;
6604 ep_skip_leading_whitespace (&arg
);
6606 cond_string
= ep_parse_optional_if_clause (&arg
);
6608 if ((*arg
!= '\0') && !isspace (*arg
))
6609 error (_("Junk at end of arguments."));
6611 if ((ex_event
!= EX_EVENT_THROW
) &&
6612 (ex_event
!= EX_EVENT_CATCH
))
6613 error (_("Unsupported or unknown exception event; cannot catch it"));
6615 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6618 warning (_("Unsupported with this platform/compiler combination."));
6621 /* Create a breakpoint struct for Ada exception catchpoints. */
6624 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6628 struct expression
*cond
,
6629 struct breakpoint_ops
*ops
,
6633 struct breakpoint
*b
;
6637 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6638 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6639 version for exception catchpoints, because two catchpoints
6640 used for different exception names will use the same address.
6641 In this case, a "breakpoint ... also set at..." warning is
6642 unproductive. Besides. the warning phrasing is also a bit
6643 inapropriate, we should use the word catchpoint, and tell
6644 the user what type of catchpoint it is. The above is good
6645 enough for now, though. */
6648 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6649 set_breakpoint_count (breakpoint_count
+ 1);
6651 b
->enable_state
= bp_enabled
;
6652 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6653 b
->number
= breakpoint_count
;
6654 b
->ignore_count
= 0;
6655 b
->loc
->cond
= cond
;
6656 b
->addr_string
= addr_string
;
6657 b
->language
= language_ada
;
6658 b
->cond_string
= cond_string
;
6659 b
->exp_string
= exp_string
;
6664 update_global_location_list (1);
6667 /* Implement the "catch exception" command. */
6670 catch_ada_exception_command (char *arg
, int tempflag
, int from_tty
)
6672 struct symtab_and_line sal
;
6674 char *addr_string
= NULL
;
6675 char *exp_string
= NULL
;
6676 char *cond_string
= NULL
;
6677 struct expression
*cond
= NULL
;
6678 struct breakpoint_ops
*ops
= NULL
;
6680 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6681 &cond_string
, &cond
, &ops
);
6682 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6683 cond_string
, cond
, ops
, tempflag
,
6687 /* Implement the "catch assert" command. */
6690 catch_assert_command (char *arg
, int tempflag
, int from_tty
)
6692 struct symtab_and_line sal
;
6693 char *addr_string
= NULL
;
6694 struct breakpoint_ops
*ops
= NULL
;
6696 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6697 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6698 tempflag
, from_tty
);
6702 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6705 /* The first argument may be an event name, such as "start" or "load".
6706 If so, then handle it as such. If it doesn't match an event name,
6707 then attempt to interpret it as an exception name. (This latter is
6708 the v4.16-and-earlier GDB meaning of the "catch" command.)
6710 First, try to find the bounds of what might be an event name. */
6711 char *arg1_start
= arg
;
6715 if (arg1_start
== NULL
)
6717 /* Old behaviour was to use pre-v-4.16 syntax */
6718 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6720 /* Now, this is not allowed */
6721 error (_("Catch requires an event name."));
6724 arg1_end
= ep_find_event_name_end (arg1_start
);
6725 if (arg1_end
== NULL
)
6726 error (_("catch requires an event"));
6727 arg1_length
= arg1_end
+ 1 - arg1_start
;
6729 /* Try to match what we found against known event names. */
6730 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6732 error (_("Catch of signal not yet implemented"));
6734 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6736 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6737 tempflag
, from_tty
);
6739 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6741 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6742 tempflag
, from_tty
);
6744 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6746 error (_("Catch of thread_start not yet implemented"));
6748 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6750 error (_("Catch of thread_exit not yet implemented"));
6752 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6754 error (_("Catch of thread_join not yet implemented"));
6756 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6758 error (_("Catch of start not yet implemented"));
6760 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6762 error (_("Catch of exit not yet implemented"));
6764 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6766 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6768 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6770 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6772 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6774 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6776 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6778 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6780 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6782 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6784 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6786 error (_("Catch of stop not yet implemented"));
6788 else if (strncmp (arg1_start
, "exception", arg1_length
) == 0)
6790 catch_ada_exception_command (arg1_end
+ 1, tempflag
, from_tty
);
6793 else if (strncmp (arg1_start
, "assert", arg1_length
) == 0)
6795 catch_assert_command (arg1_end
+ 1, tempflag
, from_tty
);
6798 /* This doesn't appear to be an event name */
6802 /* Pre-v.4.16 behaviour was to treat the argument
6803 as the name of an exception */
6804 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6805 /* Now this is not allowed */
6806 error (_("Unknown event kind specified for catch"));
6812 catch_command (char *arg
, int from_tty
)
6814 catch_command_1 (arg
, 0, from_tty
);
6819 tcatch_command (char *arg
, int from_tty
)
6821 catch_command_1 (arg
, 1, from_tty
);
6824 /* Delete breakpoints by address or line. */
6827 clear_command (char *arg
, int from_tty
)
6829 struct breakpoint
*b
;
6830 VEC(breakpoint_p
) *found
= 0;
6833 struct symtabs_and_lines sals
;
6834 struct symtab_and_line sal
;
6839 sals
= decode_line_spec (arg
, 1);
6844 sals
.sals
= (struct symtab_and_line
*)
6845 xmalloc (sizeof (struct symtab_and_line
));
6846 make_cleanup (xfree
, sals
.sals
);
6847 init_sal (&sal
); /* initialize to zeroes */
6848 sal
.line
= default_breakpoint_line
;
6849 sal
.symtab
= default_breakpoint_symtab
;
6850 sal
.pc
= default_breakpoint_address
;
6851 if (sal
.symtab
== 0)
6852 error (_("No source file specified."));
6860 /* We don't call resolve_sal_pc here. That's not
6861 as bad as it seems, because all existing breakpoints
6862 typically have both file/line and pc set. So, if
6863 clear is given file/line, we can match this to existing
6864 breakpoint without obtaining pc at all.
6866 We only support clearing given the address explicitly
6867 present in breakpoint table. Say, we've set breakpoint
6868 at file:line. There were several PC values for that file:line,
6869 due to optimization, all in one block.
6870 We've picked one PC value. If "clear" is issued with another
6871 PC corresponding to the same file:line, the breakpoint won't
6872 be cleared. We probably can still clear the breakpoint, but
6873 since the other PC value is never presented to user, user
6874 can only find it by guessing, and it does not seem important
6877 /* For each line spec given, delete bps which correspond
6878 to it. Do it in two passes, solely to preserve the current
6879 behavior that from_tty is forced true if we delete more than
6883 for (i
= 0; i
< sals
.nelts
; i
++)
6885 /* If exact pc given, clear bpts at that pc.
6886 If line given (pc == 0), clear all bpts on specified line.
6887 If defaulting, clear all bpts on default line
6890 defaulting sal.pc != 0 tests to do
6895 1 0 <can't happen> */
6899 /* Find all matching breakpoints and add them to
6904 /* Are we going to delete b? */
6905 if (b
->type
!= bp_none
6906 && b
->type
!= bp_watchpoint
6907 && b
->type
!= bp_hardware_watchpoint
6908 && b
->type
!= bp_read_watchpoint
6909 && b
->type
!= bp_access_watchpoint
)
6911 struct bp_location
*loc
= b
->loc
;
6912 for (; loc
; loc
= loc
->next
)
6914 int pc_match
= sal
.pc
6915 && (loc
->address
== sal
.pc
)
6916 && (!section_is_overlay (loc
->section
)
6917 || loc
->section
== sal
.section
);
6918 int line_match
= ((default_match
|| (0 == sal
.pc
))
6919 && b
->source_file
!= NULL
6920 && sal
.symtab
!= NULL
6921 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6922 && b
->line_number
== sal
.line
);
6923 if (pc_match
|| line_match
)
6932 VEC_safe_push(breakpoint_p
, found
, b
);
6935 /* Now go thru the 'found' chain and delete them. */
6936 if (VEC_empty(breakpoint_p
, found
))
6939 error (_("No breakpoint at %s."), arg
);
6941 error (_("No breakpoint at this line."));
6944 if (VEC_length(breakpoint_p
, found
) > 1)
6945 from_tty
= 1; /* Always report if deleted more than one */
6948 if (VEC_length(breakpoint_p
, found
) == 1)
6949 printf_unfiltered (_("Deleted breakpoint "));
6951 printf_unfiltered (_("Deleted breakpoints "));
6953 breakpoints_changed ();
6955 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6958 printf_unfiltered ("%d ", b
->number
);
6959 delete_breakpoint (b
);
6962 putchar_unfiltered ('\n');
6965 /* Delete breakpoint in BS if they are `delete' breakpoints and
6966 all breakpoints that are marked for deletion, whether hit or not.
6967 This is called after any breakpoint is hit, or after errors. */
6970 breakpoint_auto_delete (bpstat bs
)
6972 struct breakpoint
*b
, *temp
;
6974 for (; bs
; bs
= bs
->next
)
6975 if (bs
->breakpoint_at
6976 && bs
->breakpoint_at
->owner
6977 && bs
->breakpoint_at
->owner
->disposition
== disp_del
6979 delete_breakpoint (bs
->breakpoint_at
->owner
);
6981 ALL_BREAKPOINTS_SAFE (b
, temp
)
6983 if (b
->disposition
== disp_del_at_next_stop
)
6984 delete_breakpoint (b
);
6988 /* If SHOULD_INSERT is true, do not insert any breakpoint locations
6989 into the inferior, only remove already-inserted locations that no
6990 longer should be inserted. Functions that delete a breakpoint or
6991 breakpoints should pass false, so that deleting a breakpoint
6992 doesn't have the side effect of inserting the locations of other
6993 breakpoints that are marked not-inserted, but should_be_inserted
6994 returns true on them.
6996 This behaviour is useful is situations close to tear-down -- e.g.,
6997 after an exec, while the target still has execution, but breakpoint
6998 shadows of the previous executable image should *NOT* be restored
6999 to the new image; or before detaching, where the target still has
7000 execution and wants to delete breakpoints from GDB's lists, and all
7001 breakpoints had already been removed from the inferior. */
7004 update_global_location_list (int should_insert
)
7006 struct breakpoint
*b
;
7007 struct bp_location
**next
= &bp_location_chain
;
7008 struct bp_location
*loc
;
7009 struct bp_location
*loc2
;
7010 struct gdb_exception e
;
7011 VEC(bp_location_p
) *old_locations
= NULL
;
7015 /* Store old locations for future reference. */
7016 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
7017 VEC_safe_push (bp_location_p
, old_locations
, loc
);
7019 bp_location_chain
= NULL
;
7022 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
7025 next
= &(loc
->global_next
);
7030 /* Identify bp_location instances that are no longer present in the new
7031 list, and therefore should be freed. Note that it's not necessary that
7032 those locations should be removed from inferior -- if there's another
7033 location at the same address (previously marked as duplicate),
7034 we don't need to remove/insert the location. */
7035 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
7037 /* Tells if 'loc' is found amoung the new locations. If not, we
7039 int found_object
= 0;
7040 /* Tells if the location should remain inserted in the target. */
7041 int keep_in_target
= 0;
7043 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7050 /* If this location is no longer present, and inserted, look if there's
7051 maybe a new location at the same address. If so, mark that one
7052 inserted, and don't remove this one. This is needed so that we
7053 don't have a time window where a breakpoint at certain location is not
7058 /* If the location is inserted now, we might have to remove it. */
7060 if (found_object
&& should_be_inserted (loc
))
7062 /* The location is still present in the location list, and still
7063 should be inserted. Don't do anything. */
7068 /* The location is either no longer present, or got disabled.
7069 See if there's another location at the same address, in which
7070 case we don't need to remove this one from the target. */
7071 if (breakpoint_address_is_meaningful (loc
->owner
))
7072 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7074 /* For the sake of should_insert_location. The
7075 call to check_duplicates will fix up this later. */
7076 loc2
->duplicate
= 0;
7077 if (should_be_inserted (loc2
)
7078 && loc2
!= loc
&& loc2
->address
== loc
->address
)
7081 loc2
->target_info
= loc
->target_info
;
7088 if (!keep_in_target
)
7090 if (remove_breakpoint (loc
, mark_uninserted
))
7092 /* This is just about all we can do. We could keep this
7093 location on the global list, and try to remove it next
7094 time, but there's no particular reason why we will
7097 Note that at this point, loc->owner is still valid,
7098 as delete_breakpoint frees the breakpoint only
7099 after calling us. */
7100 printf_filtered (_("warning: Error removing breakpoint %d\n"),
7101 loc
->owner
->number
);
7111 /* This location was removed from the targets. In non-stop mode,
7112 a race condition is possible where we've removed a breakpoint,
7113 but stop events for that breakpoint are already queued and will
7114 arrive later. To suppress spurious SIGTRAPs reported to user,
7115 we keep this breakpoint location for a bit, and will retire it
7116 after we see 3 * thread_count events.
7117 The theory here is that reporting of events should,
7118 "on the average", be fair, so after that many event we'll see
7119 events from all threads that have anything of interest, and no
7120 longer need to keep this breakpoint. This is just a
7121 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7122 which is usability issue, but not a correctness problem. */
7123 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7127 free_bp_location (loc
);
7133 check_duplicates (b
);
7136 if (always_inserted_mode
&& should_insert
&& target_has_execution
)
7137 insert_breakpoint_locations ();
7141 breakpoint_retire_moribund (void)
7143 struct bp_location
*loc
;
7146 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7147 if (--(loc
->events_till_retirement
) == 0)
7149 free_bp_location (loc
);
7150 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7156 update_global_location_list_nothrow (int inserting
)
7158 struct gdb_exception e
;
7159 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7160 update_global_location_list (inserting
);
7163 /* Clear BPT from a BPS. */
7165 bpstat_remove_breakpoint (bpstat bps
, struct breakpoint
*bpt
)
7168 for (bs
= bps
; bs
; bs
= bs
->next
)
7169 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7171 bs
->breakpoint_at
= NULL
;
7173 /* bs->commands will be freed later. */
7177 /* Callback for iterate_over_threads. */
7179 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
7181 struct breakpoint
*bpt
= data
;
7182 bpstat_remove_breakpoint (th
->stop_bpstat
, bpt
);
7186 /* Delete a breakpoint and clean up all traces of it in the data
7190 delete_breakpoint (struct breakpoint
*bpt
)
7192 struct breakpoint
*b
;
7193 struct bp_location
*loc
, *next
;
7195 gdb_assert (bpt
!= NULL
);
7197 /* Has this bp already been deleted? This can happen because multiple
7198 lists can hold pointers to bp's. bpstat lists are especial culprits.
7200 One example of this happening is a watchpoint's scope bp. When the
7201 scope bp triggers, we notice that the watchpoint is out of scope, and
7202 delete it. We also delete its scope bp. But the scope bp is marked
7203 "auto-deleting", and is already on a bpstat. That bpstat is then
7204 checked for auto-deleting bp's, which are deleted.
7206 A real solution to this problem might involve reference counts in bp's,
7207 and/or giving them pointers back to their referencing bpstat's, and
7208 teaching delete_breakpoint to only free a bp's storage when no more
7209 references were extent. A cheaper bandaid was chosen. */
7210 if (bpt
->type
== bp_none
)
7213 observer_notify_breakpoint_deleted (bpt
->number
);
7215 if (breakpoint_chain
== bpt
)
7216 breakpoint_chain
= bpt
->next
;
7221 b
->next
= bpt
->next
;
7225 free_command_lines (&bpt
->commands
);
7226 if (bpt
->cond_string
!= NULL
)
7227 xfree (bpt
->cond_string
);
7228 if (bpt
->addr_string
!= NULL
)
7229 xfree (bpt
->addr_string
);
7230 if (bpt
->exp
!= NULL
)
7232 if (bpt
->exp_string
!= NULL
)
7233 xfree (bpt
->exp_string
);
7234 if (bpt
->val
!= NULL
)
7235 value_free (bpt
->val
);
7236 if (bpt
->source_file
!= NULL
)
7237 xfree (bpt
->source_file
);
7238 if (bpt
->dll_pathname
!= NULL
)
7239 xfree (bpt
->dll_pathname
);
7240 if (bpt
->triggered_dll_pathname
!= NULL
)
7241 xfree (bpt
->triggered_dll_pathname
);
7242 if (bpt
->exec_pathname
!= NULL
)
7243 xfree (bpt
->exec_pathname
);
7245 /* Be sure no bpstat's are pointing at it after it's been freed. */
7246 /* FIXME, how can we find all bpstat's?
7247 We just check stop_bpstat for now. Note that we cannot just
7248 remove bpstats pointing at bpt from the stop_bpstat list
7249 entirely, as breakpoint commands are associated with the bpstat;
7250 if we remove it here, then the later call to
7251 bpstat_do_actions (&stop_bpstat);
7252 in event-top.c won't do anything, and temporary breakpoints
7253 with commands won't work. */
7255 /* Clear the current context. */
7256 bpstat_remove_breakpoint (stop_bpstat
, bpt
);
7257 /* And from all threads. */
7258 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
7260 /* Now that breakpoint is removed from breakpoint
7261 list, update the global location list. This
7262 will remove locations that used to belong to
7263 this breakpoint. Do this before freeing
7264 the breakpoint itself, since remove_breakpoint
7265 looks at location's owner. It might be better
7266 design to have location completely self-contained,
7267 but it's not the case now. */
7268 update_global_location_list (0);
7271 /* On the chance that someone will soon try again to delete this same
7272 bp, we mark it as deleted before freeing its storage. */
7273 bpt
->type
= bp_none
;
7279 do_delete_breakpoint_cleanup (void *b
)
7281 delete_breakpoint (b
);
7285 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7287 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7291 delete_command (char *arg
, int from_tty
)
7293 struct breakpoint
*b
, *temp
;
7299 int breaks_to_delete
= 0;
7301 /* Delete all breakpoints if no argument.
7302 Do not delete internal or call-dummy breakpoints, these
7303 have to be deleted with an explicit breakpoint number argument. */
7306 if (b
->type
!= bp_call_dummy
&&
7307 b
->type
!= bp_shlib_event
&&
7308 b
->type
!= bp_thread_event
&&
7309 b
->type
!= bp_overlay_event
&&
7312 breaks_to_delete
= 1;
7317 /* Ask user only if there are some breakpoints to delete. */
7319 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7321 ALL_BREAKPOINTS_SAFE (b
, temp
)
7323 if (b
->type
!= bp_call_dummy
&&
7324 b
->type
!= bp_shlib_event
&&
7325 b
->type
!= bp_thread_event
&&
7326 b
->type
!= bp_overlay_event
&&
7328 delete_breakpoint (b
);
7333 map_breakpoint_numbers (arg
, delete_breakpoint
);
7337 all_locations_are_pending (struct bp_location
*loc
)
7339 for (; loc
; loc
= loc
->next
)
7340 if (!loc
->shlib_disabled
)
7345 /* Subroutine of update_breakpoint_locations to simplify it.
7346 Return non-zero if multiple fns in list LOC have the same name.
7347 Null names are ignored. */
7350 ambiguous_names_p (struct bp_location
*loc
)
7352 struct bp_location
*l
;
7353 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7354 (int (*) (const void *, const void *)) streq
,
7355 NULL
, xcalloc
, xfree
);
7357 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7360 const char *name
= l
->function_name
;
7362 /* Allow for some names to be NULL, ignore them. */
7366 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7368 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7383 update_breakpoint_locations (struct breakpoint
*b
,
7384 struct symtabs_and_lines sals
)
7388 struct bp_location
*existing_locations
= b
->loc
;
7390 /* If there's no new locations, and all existing locations
7391 are pending, don't do anything. This optimizes
7392 the common case where all locations are in the same
7393 shared library, that was unloaded. We'd like to
7394 retain the location, so that when the library
7395 is loaded again, we don't loose the enabled/disabled
7396 status of the individual locations. */
7397 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7402 for (i
= 0; i
< sals
.nelts
; ++i
)
7404 struct bp_location
*new_loc
=
7405 add_location_to_breakpoint (b
, b
->type
, &(sals
.sals
[i
]));
7407 /* Reparse conditions, they might contain references to the
7409 if (b
->cond_string
!= NULL
)
7411 struct gdb_exception e
;
7414 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7416 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7421 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7422 b
->number
, e
.message
);
7423 new_loc
->enabled
= 0;
7427 if (b
->source_file
!= NULL
)
7428 xfree (b
->source_file
);
7429 if (sals
.sals
[i
].symtab
== NULL
)
7430 b
->source_file
= NULL
;
7433 savestring (sals
.sals
[i
].symtab
->filename
,
7434 strlen (sals
.sals
[i
].symtab
->filename
));
7436 if (b
->line_number
== 0)
7437 b
->line_number
= sals
.sals
[i
].line
;
7440 /* If possible, carry over 'disable' status from existing breakpoints. */
7442 struct bp_location
*e
= existing_locations
;
7443 /* If there are multiple breakpoints with the same function name,
7444 e.g. for inline functions, comparing function names won't work.
7445 Instead compare pc addresses; this is just a heuristic as things
7446 may have moved, but in practice it gives the correct answer
7447 often enough until a better solution is found. */
7448 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7450 for (; e
; e
= e
->next
)
7452 if (!e
->enabled
&& e
->function_name
)
7454 struct bp_location
*l
= b
->loc
;
7455 if (have_ambiguous_names
)
7457 for (; l
; l
= l
->next
)
7458 if (e
->address
== l
->address
)
7466 for (; l
; l
= l
->next
)
7467 if (l
->function_name
7468 && strcmp (e
->function_name
, l
->function_name
) == 0)
7478 update_global_location_list (1);
7482 /* Reset a breakpoint given it's struct breakpoint * BINT.
7483 The value we return ends up being the return value from catch_errors.
7484 Unused in this case. */
7487 breakpoint_re_set_one (void *bint
)
7489 /* get past catch_errs */
7490 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7494 int *not_found_ptr
= ¬_found
;
7495 struct symtabs_and_lines sals
= {};
7496 struct symtabs_and_lines expanded
;
7498 enum enable_state save_enable
;
7499 struct gdb_exception e
;
7505 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7509 case bp_hardware_breakpoint
:
7511 case bp_catch_unload
:
7512 if (b
->addr_string
== NULL
)
7514 /* Anything without a string can't be re-set. */
7515 delete_breakpoint (b
);
7519 set_language (b
->language
);
7520 input_radix
= b
->input_radix
;
7522 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7524 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7529 int not_found_and_ok
= 0;
7530 /* For pending breakpoints, it's expected that parsing
7531 will fail until the right shared library is loaded.
7532 User has already told to create pending breakpoints and
7533 don't need extra messages. If breakpoint is in bp_shlib_disabled
7534 state, then user already saw the message about that breakpoint
7535 being disabled, and don't want to see more errors. */
7537 && (b
->condition_not_parsed
7538 || (b
->loc
&& b
->loc
->shlib_disabled
)
7539 || b
->enable_state
== bp_disabled
))
7540 not_found_and_ok
= 1;
7542 if (!not_found_and_ok
)
7544 /* We surely don't want to warn about the same breakpoint
7545 10 times. One solution, implemented here, is disable
7546 the breakpoint on error. Another solution would be to
7547 have separate 'warning emitted' flag. Since this
7548 happens only when a binary has changed, I don't know
7549 which approach is better. */
7550 b
->enable_state
= bp_disabled
;
7551 throw_exception (e
);
7558 gdb_assert (sals
.nelts
== 1);
7559 resolve_sal_pc (&sals
.sals
[0]);
7560 if (b
->condition_not_parsed
&& s
&& s
[0])
7562 char *cond_string
= 0;
7564 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7565 &cond_string
, &thread
);
7567 b
->cond_string
= cond_string
;
7569 b
->condition_not_parsed
= 0;
7571 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7572 update_breakpoint_locations (b
, expanded
);
7578 case bp_hardware_watchpoint
:
7579 case bp_read_watchpoint
:
7580 case bp_access_watchpoint
:
7581 /* Watchpoint can be either on expression using entirely global variables,
7582 or it can be on local variables.
7584 Watchpoints of the first kind are never auto-deleted, and even persist
7585 across program restarts. Since they can use variables from shared
7586 libraries, we need to reparse expression as libraries are loaded
7589 Watchpoints on local variables can also change meaning as result
7590 of solib event. For example, if a watchpoint uses both a local and
7591 a global variables in expression, it's a local watchpoint, but
7592 unloading of a shared library will make the expression invalid.
7593 This is not a very common use case, but we still re-evaluate
7594 expression, to avoid surprises to the user.
7596 Note that for local watchpoints, we re-evaluate it only if
7597 watchpoints frame id is still valid. If it's not, it means
7598 the watchpoint is out of scope and will be deleted soon. In fact,
7599 I'm not sure we'll ever be called in this case.
7601 If a local watchpoint's frame id is still valid, then
7602 b->exp_valid_block is likewise valid, and we can safely use it.
7604 Don't do anything about disabled watchpoints, since they will
7605 be reevaluated again when enabled. */
7606 update_watchpoint (b
, 1 /* reparse */);
7608 /* We needn't really do anything to reset these, since the mask
7609 that requests them is unaffected by e.g., new libraries being
7612 case bp_catch_vfork
:
7617 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7619 /* Delete overlay event breakpoints; they will be reset later by
7620 breakpoint_re_set. */
7621 case bp_overlay_event
:
7622 delete_breakpoint (b
);
7625 /* This breakpoint is special, it's set up when the inferior
7626 starts and we really don't want to touch it. */
7627 case bp_shlib_event
:
7629 /* Like bp_shlib_event, this breakpoint type is special.
7630 Once it is set up, we do not want to touch it. */
7631 case bp_thread_event
:
7633 /* Keep temporary breakpoints, which can be encountered when we step
7634 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7635 Otherwise these should have been blown away via the cleanup chain
7636 or by breakpoint_init_inferior when we rerun the executable. */
7639 case bp_watchpoint_scope
:
7641 case bp_step_resume
:
7643 case bp_longjmp_resume
:
7650 /* Re-set all breakpoints after symbols have been re-loaded. */
7652 breakpoint_re_set (void)
7654 struct breakpoint
*b
, *temp
;
7655 enum language save_language
;
7656 int save_input_radix
;
7658 save_language
= current_language
->la_language
;
7659 save_input_radix
= input_radix
;
7660 ALL_BREAKPOINTS_SAFE (b
, temp
)
7662 /* Format possible error msg */
7663 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7665 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7666 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7667 do_cleanups (cleanups
);
7669 set_language (save_language
);
7670 input_radix
= save_input_radix
;
7672 create_overlay_event_breakpoint ("_ovly_debug_event");
7675 /* Reset the thread number of this breakpoint:
7677 - If the breakpoint is for all threads, leave it as-is.
7678 - Else, reset it to the current thread for inferior_ptid. */
7680 breakpoint_re_set_thread (struct breakpoint
*b
)
7682 if (b
->thread
!= -1)
7684 if (in_thread_list (inferior_ptid
))
7685 b
->thread
= pid_to_thread_id (inferior_ptid
);
7689 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7690 If from_tty is nonzero, it prints a message to that effect,
7691 which ends with a period (no newline). */
7694 set_ignore_count (int bptnum
, int count
, int from_tty
)
7696 struct breakpoint
*b
;
7702 if (b
->number
== bptnum
)
7704 b
->ignore_count
= count
;
7708 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7710 else if (count
== 1)
7711 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7714 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7717 breakpoints_changed ();
7718 observer_notify_breakpoint_modified (b
->number
);
7722 error (_("No breakpoint number %d."), bptnum
);
7725 /* Clear the ignore counts of all breakpoints. */
7727 breakpoint_clear_ignore_counts (void)
7729 struct breakpoint
*b
;
7732 b
->ignore_count
= 0;
7735 /* Command to set ignore-count of breakpoint N to COUNT. */
7738 ignore_command (char *args
, int from_tty
)
7744 error_no_arg (_("a breakpoint number"));
7746 num
= get_number (&p
);
7748 error (_("bad breakpoint number: '%s'"), args
);
7750 error (_("Second argument (specified ignore-count) is missing."));
7752 set_ignore_count (num
,
7753 longest_to_int (value_as_long (parse_and_eval (p
))),
7756 printf_filtered ("\n");
7759 /* Call FUNCTION on each of the breakpoints
7760 whose numbers are given in ARGS. */
7763 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7768 struct breakpoint
*b
, *tmp
;
7772 error_no_arg (_("one or more breakpoint numbers"));
7779 num
= get_number_or_range (&p1
);
7782 warning (_("bad breakpoint number at or near '%s'"), p
);
7786 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7787 if (b
->number
== num
)
7789 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7792 if (related_breakpoint
)
7793 function (related_breakpoint
);
7797 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7803 static struct bp_location
*
7804 find_location_by_number (char *number
)
7806 char *dot
= strchr (number
, '.');
7810 struct breakpoint
*b
;
7811 struct bp_location
*loc
;
7816 bp_num
= get_number_or_range (&p1
);
7818 error (_("Bad breakpoint number '%s'"), number
);
7821 if (b
->number
== bp_num
)
7826 if (!b
|| b
->number
!= bp_num
)
7827 error (_("Bad breakpoint number '%s'"), number
);
7830 loc_num
= get_number_or_range (&p1
);
7832 error (_("Bad breakpoint location number '%s'"), number
);
7836 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7839 error (_("Bad breakpoint location number '%s'"), dot
+1);
7845 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7846 If from_tty is nonzero, it prints a message to that effect,
7847 which ends with a period (no newline). */
7850 disable_breakpoint (struct breakpoint
*bpt
)
7852 /* Never disable a watchpoint scope breakpoint; we want to
7853 hit them when we leave scope so we can delete both the
7854 watchpoint and its scope breakpoint at that time. */
7855 if (bpt
->type
== bp_watchpoint_scope
)
7858 /* You can't disable permanent breakpoints. */
7859 if (bpt
->enable_state
== bp_permanent
)
7862 bpt
->enable_state
= bp_disabled
;
7864 update_global_location_list (0);
7866 observer_notify_breakpoint_modified (bpt
->number
);
7870 disable_command (char *args
, int from_tty
)
7872 struct breakpoint
*bpt
;
7874 ALL_BREAKPOINTS (bpt
)
7878 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7883 case bp_catch_unload
:
7885 case bp_catch_vfork
:
7887 case bp_hardware_breakpoint
:
7889 case bp_hardware_watchpoint
:
7890 case bp_read_watchpoint
:
7891 case bp_access_watchpoint
:
7892 disable_breakpoint (bpt
);
7896 else if (strchr (args
, '.'))
7898 struct bp_location
*loc
= find_location_by_number (args
);
7901 update_global_location_list (0);
7904 map_breakpoint_numbers (args
, disable_breakpoint
);
7908 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7910 int target_resources_ok
, other_type_used
;
7913 if (bpt
->type
== bp_hardware_breakpoint
)
7916 i
= hw_breakpoint_used_count ();
7917 target_resources_ok
=
7918 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7920 if (target_resources_ok
== 0)
7921 error (_("No hardware breakpoint support in the target."));
7922 else if (target_resources_ok
< 0)
7923 error (_("Hardware breakpoints used exceeds limit."));
7926 if (bpt
->type
== bp_watchpoint
||
7927 bpt
->type
== bp_hardware_watchpoint
||
7928 bpt
->type
== bp_read_watchpoint
||
7929 bpt
->type
== bp_access_watchpoint
)
7931 struct frame_id saved_frame_id
;
7933 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7934 if (bpt
->exp_valid_block
!= NULL
)
7936 struct frame_info
*fr
=
7937 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7940 printf_filtered (_("\
7941 Cannot enable watchpoint %d because the block in which its expression\n\
7942 is valid is not currently in scope.\n"), bpt
->number
);
7949 value_free (bpt
->val
);
7950 mark
= value_mark ();
7951 fetch_watchpoint_value (bpt
->exp
, &bpt
->val
, NULL
, NULL
);
7953 release_value (bpt
->val
);
7956 if (bpt
->type
== bp_hardware_watchpoint
||
7957 bpt
->type
== bp_read_watchpoint
||
7958 bpt
->type
== bp_access_watchpoint
)
7960 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7961 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7963 /* Hack around 'unused var' error for some targets here */
7964 (void) mem_cnt
, (void) i
;
7965 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7966 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7967 /* we can consider of type is bp_hardware_watchpoint, convert to
7968 bp_watchpoint in the following condition */
7969 if (target_resources_ok
< 0)
7971 printf_filtered (_("\
7972 Cannot enable watchpoint %d because target watch resources\n\
7973 have been allocated for other watchpoints.\n"), bpt
->number
);
7974 value_free_to_mark (mark
);
7979 select_frame (frame_find_by_id (saved_frame_id
));
7980 value_free_to_mark (mark
);
7983 if (bpt
->enable_state
!= bp_permanent
)
7984 bpt
->enable_state
= bp_enabled
;
7985 bpt
->disposition
= disposition
;
7986 update_global_location_list (1);
7987 breakpoints_changed ();
7989 observer_notify_breakpoint_modified (bpt
->number
);
7994 enable_breakpoint (struct breakpoint
*bpt
)
7996 do_enable_breakpoint (bpt
, bpt
->disposition
);
7999 /* The enable command enables the specified breakpoints (or all defined
8000 breakpoints) so they once again become (or continue to be) effective
8001 in stopping the inferior. */
8004 enable_command (char *args
, int from_tty
)
8006 struct breakpoint
*bpt
;
8008 ALL_BREAKPOINTS (bpt
)
8012 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
8017 case bp_catch_unload
:
8019 case bp_catch_vfork
:
8021 case bp_hardware_breakpoint
:
8023 case bp_hardware_watchpoint
:
8024 case bp_read_watchpoint
:
8025 case bp_access_watchpoint
:
8026 enable_breakpoint (bpt
);
8030 else if (strchr (args
, '.'))
8032 struct bp_location
*loc
= find_location_by_number (args
);
8035 update_global_location_list (1);
8038 map_breakpoint_numbers (args
, enable_breakpoint
);
8042 enable_once_breakpoint (struct breakpoint
*bpt
)
8044 do_enable_breakpoint (bpt
, disp_disable
);
8048 enable_once_command (char *args
, int from_tty
)
8050 map_breakpoint_numbers (args
, enable_once_breakpoint
);
8054 enable_delete_breakpoint (struct breakpoint
*bpt
)
8056 do_enable_breakpoint (bpt
, disp_del
);
8060 enable_delete_command (char *args
, int from_tty
)
8062 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
8066 set_breakpoint_cmd (char *args
, int from_tty
)
8071 show_breakpoint_cmd (char *args
, int from_tty
)
8075 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
8077 struct symtabs_and_lines
8078 decode_line_spec_1 (char *string
, int funfirstline
)
8080 struct symtabs_and_lines sals
;
8082 error (_("Empty line specification."));
8083 if (default_breakpoint_valid
)
8084 sals
= decode_line_1 (&string
, funfirstline
,
8085 default_breakpoint_symtab
,
8086 default_breakpoint_line
,
8087 (char ***) NULL
, NULL
);
8089 sals
= decode_line_1 (&string
, funfirstline
,
8090 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
8092 error (_("Junk at end of line specification: %s"), string
);
8096 /* Create and insert a raw software breakpoint at PC. Return an
8097 identifier, which should be used to remove the breakpoint later.
8098 In general, places which call this should be using something on the
8099 breakpoint chain instead; this function should be eliminated
8103 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
8105 struct bp_target_info
*bp_tgt
;
8107 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
8108 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
8110 bp_tgt
->placed_address
= pc
;
8111 if (target_insert_breakpoint (bp_tgt
) != 0)
8113 /* Could not insert the breakpoint. */
8121 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
8124 deprecated_remove_raw_breakpoint (void *bp
)
8126 struct bp_target_info
*bp_tgt
= bp
;
8129 ret
= target_remove_breakpoint (bp_tgt
);
8135 /* One (or perhaps two) breakpoints used for software single stepping. */
8137 static void *single_step_breakpoints
[2];
8139 /* Create and insert a breakpoint for software single step. */
8142 insert_single_step_breakpoint (CORE_ADDR next_pc
)
8146 if (single_step_breakpoints
[0] == NULL
)
8147 bpt_p
= &single_step_breakpoints
[0];
8150 gdb_assert (single_step_breakpoints
[1] == NULL
);
8151 bpt_p
= &single_step_breakpoints
[1];
8154 /* NOTE drow/2006-04-11: A future improvement to this function would be
8155 to only create the breakpoints once, and actually put them on the
8156 breakpoint chain. That would let us use set_raw_breakpoint. We could
8157 adjust the addresses each time they were needed. Doing this requires
8158 corresponding changes elsewhere where single step breakpoints are
8159 handled, however. So, for now, we use this. */
8161 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
8163 error (_("Could not insert single-step breakpoint at 0x%s"),
8164 paddr_nz (next_pc
));
8167 /* Remove and delete any breakpoints used for software single step. */
8170 remove_single_step_breakpoints (void)
8172 gdb_assert (single_step_breakpoints
[0] != NULL
);
8174 /* See insert_single_step_breakpoint for more about this deprecated
8176 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8177 single_step_breakpoints
[0] = NULL
;
8179 if (single_step_breakpoints
[1] != NULL
)
8181 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8182 single_step_breakpoints
[1] = NULL
;
8186 /* Check whether a software single-step breakpoint is inserted at PC. */
8189 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8193 for (i
= 0; i
< 2; i
++)
8195 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8196 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8203 int breakpoints_always_inserted_mode (void)
8205 return always_inserted_mode
;
8209 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8210 It is defined as a macro to prevent duplication.
8211 COMMAND should be a string constant containing the name of the command. */
8212 #define BREAK_ARGS_HELP(command) \
8213 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8214 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8215 If a line number is specified, break at start of code for that line.\n\
8216 If a function is specified, break at start of code for that function.\n\
8217 If an address is specified, break at that exact address.\n\
8218 With no LOCATION, uses current execution address of selected stack frame.\n\
8219 This is useful for breaking on return to a stack frame.\n\
8221 THREADNUM is the number from \"info threads\".\n\
8222 CONDITION is a boolean expression.\n\
8224 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8226 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8229 _initialize_breakpoint (void)
8231 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8232 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8233 struct cmd_list_element
*c
;
8235 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8237 breakpoint_chain
= 0;
8238 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8239 before a breakpoint is set. */
8240 breakpoint_count
= 0;
8242 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8243 Set ignore-count of breakpoint number N to COUNT.\n\
8244 Usage is `ignore N COUNT'."));
8246 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8248 add_com ("commands", class_breakpoint
, commands_command
, _("\
8249 Set commands to be executed when a breakpoint is hit.\n\
8250 Give breakpoint number as argument after \"commands\".\n\
8251 With no argument, the targeted breakpoint is the last one set.\n\
8252 The commands themselves follow starting on the next line.\n\
8253 Type a line containing \"end\" to indicate the end of them.\n\
8254 Give \"silent\" as the first line to make the breakpoint silent;\n\
8255 then no output is printed when it is hit, except what the commands print."));
8257 add_com ("condition", class_breakpoint
, condition_command
, _("\
8258 Specify breakpoint number N to break only if COND is true.\n\
8259 Usage is `condition N COND', where N is an integer and COND is an\n\
8260 expression to be evaluated whenever breakpoint N is reached."));
8262 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8263 Set a temporary breakpoint.\n\
8264 Like \"break\" except the breakpoint is only temporary,\n\
8265 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8266 by using \"enable delete\" on the breakpoint number.\n\
8268 BREAK_ARGS_HELP ("tbreak")));
8269 set_cmd_completer (c
, location_completer
);
8271 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8272 Set a hardware assisted breakpoint.\n\
8273 Like \"break\" except the breakpoint requires hardware support,\n\
8274 some target hardware may not have this support.\n\
8276 BREAK_ARGS_HELP ("hbreak")));
8277 set_cmd_completer (c
, location_completer
);
8279 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8280 Set a temporary hardware assisted breakpoint.\n\
8281 Like \"hbreak\" except the breakpoint is only temporary,\n\
8282 so it will be deleted when hit.\n\
8284 BREAK_ARGS_HELP ("thbreak")));
8285 set_cmd_completer (c
, location_completer
);
8287 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8288 Enable some breakpoints.\n\
8289 Give breakpoint numbers (separated by spaces) as arguments.\n\
8290 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8291 This is used to cancel the effect of the \"disable\" command.\n\
8292 With a subcommand you can enable temporarily."),
8293 &enablelist
, "enable ", 1, &cmdlist
);
8295 add_com ("ab", class_breakpoint
, enable_command
, _("\
8296 Enable some breakpoints.\n\
8297 Give breakpoint numbers (separated by spaces) as arguments.\n\
8298 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8299 This is used to cancel the effect of the \"disable\" command.\n\
8300 With a subcommand you can enable temporarily."));
8302 add_com_alias ("en", "enable", class_breakpoint
, 1);
8304 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8305 Enable some breakpoints.\n\
8306 Give breakpoint numbers (separated by spaces) as arguments.\n\
8307 This is used to cancel the effect of the \"disable\" command.\n\
8308 May be abbreviated to simply \"enable\".\n"),
8309 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8311 add_cmd ("once", no_class
, enable_once_command
, _("\
8312 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8313 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8316 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8317 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8318 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8321 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8322 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8323 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8326 add_cmd ("once", no_class
, enable_once_command
, _("\
8327 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8328 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8331 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8332 Disable some breakpoints.\n\
8333 Arguments are breakpoint numbers with spaces in between.\n\
8334 To disable all breakpoints, give no argument.\n\
8335 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8336 &disablelist
, "disable ", 1, &cmdlist
);
8337 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8338 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8340 add_com ("sb", class_breakpoint
, disable_command
, _("\
8341 Disable some breakpoints.\n\
8342 Arguments are breakpoint numbers with spaces in between.\n\
8343 To disable all breakpoints, give no argument.\n\
8344 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8346 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8347 Disable some breakpoints.\n\
8348 Arguments are breakpoint numbers with spaces in between.\n\
8349 To disable all breakpoints, give no argument.\n\
8350 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8351 This command may be abbreviated \"disable\"."),
8354 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8355 Delete some breakpoints or auto-display expressions.\n\
8356 Arguments are breakpoint numbers with spaces in between.\n\
8357 To delete all breakpoints, give no argument.\n\
8359 Also a prefix command for deletion of other GDB objects.\n\
8360 The \"unset\" command is also an alias for \"delete\"."),
8361 &deletelist
, "delete ", 1, &cmdlist
);
8362 add_com_alias ("d", "delete", class_breakpoint
, 1);
8363 add_com_alias ("del", "delete", class_breakpoint
, 1);
8365 add_com ("db", class_breakpoint
, delete_command
, _("\
8366 Delete some breakpoints.\n\
8367 Arguments are breakpoint numbers with spaces in between.\n\
8368 To delete all breakpoints, give no argument.\n"));
8370 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8371 Delete some breakpoints or auto-display expressions.\n\
8372 Arguments are breakpoint numbers with spaces in between.\n\
8373 To delete all breakpoints, give no argument.\n\
8374 This command may be abbreviated \"delete\"."),
8377 add_com ("clear", class_breakpoint
, clear_command
, _("\
8378 Clear breakpoint at specified line or function.\n\
8379 Argument may be line number, function name, or \"*\" and an address.\n\
8380 If line number is specified, all breakpoints in that line are cleared.\n\
8381 If function is specified, breakpoints at beginning of function are cleared.\n\
8382 If an address is specified, breakpoints at that address are cleared.\n\
8384 With no argument, clears all breakpoints in the line that the selected frame\n\
8387 See also the \"delete\" command which clears breakpoints by number."));
8389 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8390 Set breakpoint at specified line or function.\n"
8391 BREAK_ARGS_HELP ("break")));
8392 set_cmd_completer (c
, location_completer
);
8394 add_com_alias ("b", "break", class_run
, 1);
8395 add_com_alias ("br", "break", class_run
, 1);
8396 add_com_alias ("bre", "break", class_run
, 1);
8397 add_com_alias ("brea", "break", class_run
, 1);
8401 add_com_alias ("ba", "break", class_breakpoint
, 1);
8402 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8407 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8408 Break in function/address or break at a line in the current file."),
8409 &stoplist
, "stop ", 1, &cmdlist
);
8410 add_cmd ("in", class_breakpoint
, stopin_command
,
8411 _("Break in function or address."), &stoplist
);
8412 add_cmd ("at", class_breakpoint
, stopat_command
,
8413 _("Break at a line in the current file."), &stoplist
);
8414 add_com ("status", class_info
, breakpoints_info
, _("\
8415 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8416 The \"Type\" column indicates one of:\n\
8417 \tbreakpoint - normal breakpoint\n\
8418 \twatchpoint - watchpoint\n\
8419 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8420 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8421 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8422 address and file/line number respectively.\n\
8424 Convenience variable \"$_\" and default examine address for \"x\"\n\
8425 are set to the address of the last breakpoint listed unless the command\n\
8426 is prefixed with \"server \".\n\n\
8427 Convenience variable \"$bpnum\" contains the number of the last\n\
8431 add_info ("breakpoints", breakpoints_info
, _("\
8432 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8433 The \"Type\" column indicates one of:\n\
8434 \tbreakpoint - normal breakpoint\n\
8435 \twatchpoint - watchpoint\n\
8436 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8437 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8438 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8439 address and file/line number respectively.\n\
8441 Convenience variable \"$_\" and default examine address for \"x\"\n\
8442 are set to the address of the last breakpoint listed unless the command\n\
8443 is prefixed with \"server \".\n\n\
8444 Convenience variable \"$bpnum\" contains the number of the last\n\
8448 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8449 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8450 The \"Type\" column indicates one of:\n\
8451 \tbreakpoint - normal breakpoint\n\
8452 \twatchpoint - watchpoint\n\
8453 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8454 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8455 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8456 address and file/line number respectively.\n\
8458 Convenience variable \"$_\" and default examine address for \"x\"\n\
8459 are set to the address of the last breakpoint listed unless the command\n\
8460 is prefixed with \"server \".\n\n\
8461 Convenience variable \"$bpnum\" contains the number of the last\n\
8464 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8465 Status of all breakpoints, or breakpoint number NUMBER.\n\
8466 The \"Type\" column indicates one of:\n\
8467 \tbreakpoint - normal breakpoint\n\
8468 \twatchpoint - watchpoint\n\
8469 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8470 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8471 \tuntil - internal breakpoint used by the \"until\" command\n\
8472 \tfinish - internal breakpoint used by the \"finish\" command\n\
8473 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8474 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8475 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8476 address and file/line number respectively.\n\
8478 Convenience variable \"$_\" and default examine address for \"x\"\n\
8479 are set to the address of the last breakpoint listed unless the command\n\
8480 is prefixed with \"server \".\n\n\
8481 Convenience variable \"$bpnum\" contains the number of the last\n\
8483 &maintenanceinfolist
);
8485 add_com ("catch", class_breakpoint
, catch_command
, _("\
8486 Set catchpoints to catch events.\n\
8487 Raised signals may be caught:\n\
8488 \tcatch signal - all signals\n\
8489 \tcatch signal <signame> - a particular signal\n\
8490 Raised exceptions may be caught:\n\
8491 \tcatch throw - all exceptions, when thrown\n\
8492 \tcatch throw <exceptname> - a particular exception, when thrown\n\
8493 \tcatch catch - all exceptions, when caught\n\
8494 \tcatch catch <exceptname> - a particular exception, when caught\n\
8495 Thread or process events may be caught:\n\
8496 \tcatch thread_start - any threads, just after creation\n\
8497 \tcatch thread_exit - any threads, just before expiration\n\
8498 \tcatch thread_join - any threads, just after joins\n\
8499 Process events may be caught:\n\
8500 \tcatch start - any processes, just after creation\n\
8501 \tcatch exit - any processes, just before expiration\n\
8502 \tcatch fork - calls to fork()\n\
8503 \tcatch vfork - calls to vfork()\n\
8504 \tcatch exec - calls to exec()\n\
8505 Dynamically-linked library events may be caught:\n\
8506 \tcatch load - loads of any library\n\
8507 \tcatch load <libname> - loads of a particular library\n\
8508 \tcatch unload - unloads of any library\n\
8509 \tcatch unload <libname> - unloads of a particular library\n\
8510 The act of your program's execution stopping may also be caught:\n\
8512 C++ exceptions may be caught:\n\
8513 \tcatch throw - all exceptions, when thrown\n\
8514 \tcatch catch - all exceptions, when caught\n\
8515 Ada exceptions may be caught:\n\
8516 \tcatch exception - all exceptions, when raised\n\
8517 \tcatch exception <name> - a particular exception, when raised\n\
8518 \tcatch exception unhandled - all unhandled exceptions, when raised\n\
8519 \tcatch assert - all failed assertions, when raised\n\
8521 Do \"help set follow-fork-mode\" for info on debugging your program\n\
8522 after a fork or vfork is caught.\n\n\
8523 Do \"help breakpoints\" for info on other commands dealing with breakpoints."));
8525 add_com ("tcatch", class_breakpoint
, tcatch_command
, _("\
8526 Set temporary catchpoints to catch events.\n\
8527 Args like \"catch\" command.\n\
8528 Like \"catch\" except the catchpoint is only temporary,\n\
8529 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
8530 by using \"enable delete\" on the catchpoint number."));
8532 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8533 Set a watchpoint for an expression.\n\
8534 A watchpoint stops execution of your program whenever the value of\n\
8535 an expression changes."));
8536 set_cmd_completer (c
, expression_completer
);
8538 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8539 Set a read watchpoint for an expression.\n\
8540 A watchpoint stops execution of your program whenever the value of\n\
8541 an expression is read."));
8542 set_cmd_completer (c
, expression_completer
);
8544 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8545 Set a watchpoint for an expression.\n\
8546 A watchpoint stops execution of your program whenever the value of\n\
8547 an expression is either read or written."));
8548 set_cmd_completer (c
, expression_completer
);
8550 add_info ("watchpoints", breakpoints_info
,
8551 _("Synonym for ``info breakpoints''."));
8554 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8555 respond to changes - contrary to the description. */
8556 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8557 &can_use_hw_watchpoints
, _("\
8558 Set debugger's willingness to use watchpoint hardware."), _("\
8559 Show debugger's willingness to use watchpoint hardware."), _("\
8560 If zero, gdb will not use hardware for new watchpoints, even if\n\
8561 such is available. (However, any hardware watchpoints that were\n\
8562 created before setting this to nonzero, will continue to use watchpoint\n\
8565 show_can_use_hw_watchpoints
,
8566 &setlist
, &showlist
);
8568 can_use_hw_watchpoints
= 1;
8570 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8571 Breakpoint specific settings\n\
8572 Configure various breakpoint-specific variables such as\n\
8573 pending breakpoint behavior"),
8574 &breakpoint_set_cmdlist
, "set breakpoint ",
8575 0/*allow-unknown*/, &setlist
);
8576 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8577 Breakpoint specific settings\n\
8578 Configure various breakpoint-specific variables such as\n\
8579 pending breakpoint behavior"),
8580 &breakpoint_show_cmdlist
, "show breakpoint ",
8581 0/*allow-unknown*/, &showlist
);
8583 add_setshow_auto_boolean_cmd ("pending", no_class
,
8584 &pending_break_support
, _("\
8585 Set debugger's behavior regarding pending breakpoints."), _("\
8586 Show debugger's behavior regarding pending breakpoints."), _("\
8587 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8588 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8589 an error. If auto, an unrecognized breakpoint location results in a\n\
8590 user-query to see if a pending breakpoint should be created."),
8592 show_pending_break_support
,
8593 &breakpoint_set_cmdlist
,
8594 &breakpoint_show_cmdlist
);
8596 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8598 add_setshow_boolean_cmd ("auto-hw", no_class
,
8599 &automatic_hardware_breakpoints
, _("\
8600 Set automatic usage of hardware breakpoints."), _("\
8601 Show automatic usage of hardware breakpoints."), _("\
8602 If set, the debugger will automatically use hardware breakpoints for\n\
8603 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8604 a warning will be emitted for such breakpoints."),
8606 show_automatic_hardware_breakpoints
,
8607 &breakpoint_set_cmdlist
,
8608 &breakpoint_show_cmdlist
);
8610 add_setshow_boolean_cmd ("always-inserted", class_support
,
8611 &always_inserted_mode
, _("\
8612 Set mode for inserting breakpoints."), _("\
8613 Show mode for inserting breakpoints."), _("\
8614 When this mode is off (which is the default), breakpoints are inserted in\n\
8615 inferior when it is resumed, and removed when execution stops. When this\n\
8616 mode is on, breakpoints are inserted immediately and removed only when\n\
8617 the user deletes the breakpoint."),
8619 &show_always_inserted_mode
,
8620 &breakpoint_set_cmdlist
,
8621 &breakpoint_show_cmdlist
);
8623 automatic_hardware_breakpoints
= 1;