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 "gdb-events.h"
61 #include "mi/mi-common.h"
63 /* Prototypes for local functions. */
65 static void until_break_command_continuation (struct continuation_arg
*arg
,
68 static void catch_command_1 (char *, int, int);
70 static void enable_delete_command (char *, int);
72 static void enable_delete_breakpoint (struct breakpoint
*);
74 static void enable_once_command (char *, int);
76 static void enable_once_breakpoint (struct breakpoint
*);
78 static void disable_command (char *, int);
80 static void enable_command (char *, int);
82 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
84 static void ignore_command (char *, int);
86 static int breakpoint_re_set_one (void *);
88 static void clear_command (char *, int);
90 static void catch_command (char *, int);
92 static void watch_command (char *, int);
94 static int can_use_hardware_watchpoint (struct value
*);
96 static void break_command_1 (char *, int, int);
98 static void mention (struct breakpoint
*);
100 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
102 static void check_duplicates (struct breakpoint
*);
104 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
106 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
109 static void describe_other_breakpoints (CORE_ADDR
, asection
*, int);
111 static void breakpoints_info (char *, int);
113 static void breakpoint_1 (int, int);
115 static bpstat
bpstat_alloc (const struct bp_location
*, bpstat
);
117 static int breakpoint_cond_eval (void *);
119 static void cleanup_executing_breakpoints (void *);
121 static void commands_command (char *, int);
123 static void condition_command (char *, int);
125 static int get_number_trailer (char **, int);
127 void set_breakpoint_count (int);
136 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
138 static enum print_stop_action
print_it_typical (bpstat
);
140 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
142 static int watchpoint_check (void *);
144 static void maintenance_info_breakpoints (char *, int);
146 static void create_overlay_event_breakpoint (char *);
148 static int hw_breakpoint_used_count (void);
150 static int hw_watchpoint_used_count (enum bptype
, int *);
152 static void hbreak_command (char *, int);
154 static void thbreak_command (char *, int);
156 static void watch_command_1 (char *, int, int);
158 static void rwatch_command (char *, int);
160 static void awatch_command (char *, int);
162 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
164 static void create_fork_vfork_event_catchpoint (int tempflag
,
166 enum bptype bp_kind
);
168 static void stop_command (char *arg
, int from_tty
);
170 static void stopin_command (char *arg
, int from_tty
);
172 static void stopat_command (char *arg
, int from_tty
);
174 static char *ep_find_event_name_end (char *arg
);
176 static char *ep_parse_optional_if_clause (char **arg
);
178 static char *ep_parse_optional_filename (char **arg
);
180 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
181 char *arg
, int tempflag
, int from_tty
);
183 static void tcatch_command (char *arg
, int from_tty
);
185 static void ep_skip_leading_whitespace (char **s
);
187 static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc
);
189 static void free_bp_location (struct bp_location
*loc
);
191 static void mark_breakpoints_out (void);
193 static struct bp_location
*
194 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
);
196 static void update_global_location_list (void);
198 static void update_global_location_list_nothrow (void);
200 static int is_hardware_watchpoint (struct breakpoint
*bpt
);
202 static void insert_breakpoint_locations (void);
205 bpdisp_text (enum bpdisp disp
)
207 /* NOTE: the following values are a part of MI protocol and represent
208 values of 'disp' field returned when inferior stops at a breakpoint. */
209 static char *bpdisps
[] = {"del", "dstp", "dis", "keep"};
210 return bpdisps
[(int) disp
];
213 /* Prototypes for exported functions. */
214 /* If FALSE, gdb will not use hardware support for watchpoints, even
215 if such is available. */
216 static int can_use_hw_watchpoints
;
219 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
220 struct cmd_list_element
*c
,
223 fprintf_filtered (file
, _("\
224 Debugger's willingness to use watchpoint hardware is %s.\n"),
228 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
229 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
230 for unrecognized breakpoint locations.
231 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
232 static enum auto_boolean pending_break_support
;
234 show_pending_break_support (struct ui_file
*file
, int from_tty
,
235 struct cmd_list_element
*c
,
238 fprintf_filtered (file
, _("\
239 Debugger's behavior regarding pending breakpoints is %s.\n"),
243 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
244 set with "break" but falling in read-only memory.
245 If 0, gdb will warn about such breakpoints, but won't automatically
246 use hardware breakpoints. */
247 static int automatic_hardware_breakpoints
;
249 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
250 struct cmd_list_element
*c
,
253 fprintf_filtered (file
, _("\
254 Automatic usage of hardware breakpoints is %s.\n"),
258 /* If 1, gdb will keep breakpoints inserted even as inferior is stopped,
259 and immediately insert any new breakpoints. If 0, gdb will insert
260 breakpoints into inferior only when resuming it, and will remove
261 breakpoints upon stop. */
262 static int always_inserted_mode
= 0;
264 show_always_inserted_mode (struct ui_file
*file
, int from_tty
,
265 struct cmd_list_element
*c
, const char *value
)
267 fprintf_filtered (file
, _("Always inserted breakpoint mode is %s.\n"), value
);
271 void _initialize_breakpoint (void);
273 extern int addressprint
; /* Print machine addresses? */
275 /* Are we executing breakpoint commands? */
276 static int executing_breakpoint_commands
;
278 /* Are overlay event breakpoints enabled? */
279 static int overlay_events_enabled
;
281 /* Walk the following statement or block through all breakpoints.
282 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
285 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
287 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
288 for (B = breakpoint_chain; \
289 B ? (TMP=B->next, 1): 0; \
292 /* Similar iterators for the low-level breakpoints. */
294 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->global_next)
296 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
297 for (B = bp_location_chain; \
298 B ? (TMP=B->global_next, 1): 0; \
301 /* True if breakpoint hit counts should be displayed in breakpoint info. */
303 int show_breakpoint_hit_counts
= 1;
305 /* Chains of all breakpoints defined. */
307 struct breakpoint
*breakpoint_chain
;
309 struct bp_location
*bp_location_chain
;
311 /* The locations that no longer correspond to any breakpoint,
312 unlinked from bp_location_chain, but for which a hit
313 may still be reported by a target. */
314 VEC(bp_location_p
) *moribund_locations
= NULL
;
316 /* Number of last breakpoint made. */
318 int breakpoint_count
;
320 /* This function returns a pointer to the string representation of the
321 pathname of the dynamically-linked library that has just been
324 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
325 or undefined results are guaranteed.
327 This string's contents are only valid immediately after the
328 inferior has stopped in the dynamic linker hook, and becomes
329 invalid as soon as the inferior is continued. Clients should make
330 a copy of this string if they wish to continue the inferior and
331 then access the string. */
333 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
334 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
337 /* This function returns a pointer to the string representation of the
338 pathname of the dynamically-linked library that has just been
341 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
342 TRUE, or undefined results are guaranteed.
344 This string's contents are only valid immediately after the
345 inferior has stopped in the dynamic linker hook, and becomes
346 invalid as soon as the inferior is continued. Clients should make
347 a copy of this string if they wish to continue the inferior and
348 then access the string. */
350 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
351 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
354 /* This function is called by the "catch load" command. It allows the
355 debugger to be notified by the dynamic linker when a specified
356 library file (or any library file, if filename is NULL) is loaded. */
358 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
359 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
360 error (_("catch of library loads not yet implemented on this platform"))
363 /* This function is called by the "catch unload" command. It allows
364 the debugger to be notified by the dynamic linker when a specified
365 library file (or any library file, if filename is NULL) is
368 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
369 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid, tempflag, filename, cond_string) \
370 error (_("catch of library unloads not yet implemented on this platform"))
373 /* Return whether a breakpoint is an active enabled breakpoint. */
375 breakpoint_enabled (struct breakpoint
*b
)
377 return (b
->enable_state
== bp_enabled
);
380 /* Set breakpoint count to NUM. */
383 set_breakpoint_count (int num
)
385 breakpoint_count
= num
;
386 set_internalvar (lookup_internalvar ("bpnum"),
387 value_from_longest (builtin_type_int
, (LONGEST
) num
));
390 /* Used in run_command to zero the hit count when a new run starts. */
393 clear_breakpoint_hit_counts (void)
395 struct breakpoint
*b
;
401 /* Default address, symtab and line to put a breakpoint at
402 for "break" command with no arg.
403 if default_breakpoint_valid is zero, the other three are
404 not valid, and "break" with no arg is an error.
406 This set by print_stack_frame, which calls set_default_breakpoint. */
408 int default_breakpoint_valid
;
409 CORE_ADDR default_breakpoint_address
;
410 struct symtab
*default_breakpoint_symtab
;
411 int default_breakpoint_line
;
413 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
414 Advance *PP after the string and any trailing whitespace.
416 Currently the string can either be a number or "$" followed by the name
417 of a convenience variable. Making it an expression wouldn't work well
418 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
420 If the string is a NULL pointer, that denotes the last breakpoint.
422 TRAILER is a character which can be found after the number; most
423 commonly this is `-'. If you don't want a trailer, use \0. */
425 get_number_trailer (char **pp
, int trailer
)
427 int retval
= 0; /* default */
431 /* Empty line means refer to the last breakpoint. */
432 return breakpoint_count
;
435 /* Make a copy of the name, so we can null-terminate it
436 to pass to lookup_internalvar(). */
441 while (isalnum (*p
) || *p
== '_')
443 varname
= (char *) alloca (p
- start
+ 1);
444 strncpy (varname
, start
, p
- start
);
445 varname
[p
- start
] = '\0';
446 val
= value_of_internalvar (lookup_internalvar (varname
));
447 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
448 retval
= (int) value_as_long (val
);
451 printf_filtered (_("Convenience variable must have integer value.\n"));
459 while (*p
>= '0' && *p
<= '9')
462 /* There is no number here. (e.g. "cond a == b"). */
464 /* Skip non-numeric token */
465 while (*p
&& !isspace((int) *p
))
467 /* Return zero, which caller must interpret as error. */
473 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
475 /* Trailing junk: return 0 and let caller print error msg. */
476 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
487 /* Like get_number_trailer, but don't allow a trailer. */
489 get_number (char **pp
)
491 return get_number_trailer (pp
, '\0');
494 /* Parse a number or a range.
495 * A number will be of the form handled by get_number.
496 * A range will be of the form <number1> - <number2>, and
497 * will represent all the integers between number1 and number2,
500 * While processing a range, this fuction is called iteratively;
501 * At each call it will return the next value in the range.
503 * At the beginning of parsing a range, the char pointer PP will
504 * be advanced past <number1> and left pointing at the '-' token.
505 * Subsequent calls will not advance the pointer until the range
506 * is completed. The call that completes the range will advance
507 * pointer PP past <number2>.
511 get_number_or_range (char **pp
)
513 static int last_retval
, end_value
;
514 static char *end_ptr
;
515 static int in_range
= 0;
519 /* Default case: pp is pointing either to a solo number,
520 or to the first number of a range. */
521 last_retval
= get_number_trailer (pp
, '-');
526 /* This is the start of a range (<number1> - <number2>).
527 Skip the '-', parse and remember the second number,
528 and also remember the end of the final token. */
532 while (isspace ((int) *end_ptr
))
533 end_ptr
++; /* skip white space */
534 end_value
= get_number (temp
);
535 if (end_value
< last_retval
)
537 error (_("inverted range"));
539 else if (end_value
== last_retval
)
541 /* degenerate range (number1 == number2). Advance the
542 token pointer so that the range will be treated as a
551 error (_("negative value"));
554 /* pp points to the '-' that betokens a range. All
555 number-parsing has already been done. Return the next
556 integer value (one greater than the saved previous value).
557 Do not advance the token pointer 'pp' until the end of range
560 if (++last_retval
== end_value
)
562 /* End of range reached; advance token pointer. */
572 /* condition N EXP -- set break condition of breakpoint N to EXP. */
575 condition_command (char *arg
, int from_tty
)
577 struct breakpoint
*b
;
582 error_no_arg (_("breakpoint number"));
585 bnum
= get_number (&p
);
587 error (_("Bad breakpoint argument: '%s'"), arg
);
590 if (b
->number
== bnum
)
592 struct bp_location
*loc
= b
->loc
;
593 for (; loc
; loc
= loc
->next
)
601 if (b
->cond_string
!= NULL
)
602 xfree (b
->cond_string
);
606 b
->cond_string
= NULL
;
608 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
613 /* I don't know if it matters whether this is the string the user
614 typed in or the decompiled expression. */
615 b
->cond_string
= savestring (arg
, strlen (arg
));
616 b
->condition_not_parsed
= 0;
617 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
621 parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
623 error (_("Junk at end of expression"));
626 breakpoints_changed ();
627 breakpoint_modify_event (b
->number
);
631 error (_("No breakpoint number %d."), bnum
);
635 commands_command (char *arg
, int from_tty
)
637 struct breakpoint
*b
;
640 struct command_line
*l
;
642 /* If we allowed this, we would have problems with when to
643 free the storage, if we change the commands currently
646 if (executing_breakpoint_commands
)
647 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
650 bnum
= get_number (&p
);
653 error (_("Unexpected extra arguments following breakpoint number."));
656 if (b
->number
== bnum
)
658 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
660 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
661 l
= read_command_lines (tmpbuf
, from_tty
);
662 do_cleanups (cleanups
);
663 free_command_lines (&b
->commands
);
665 breakpoints_changed ();
666 breakpoint_modify_event (b
->number
);
669 error (_("No breakpoint number %d."), bnum
);
672 /* Like commands_command, but instead of reading the commands from
673 input stream, takes them from an already parsed command structure.
675 This is used by cli-script.c to DTRT with breakpoint commands
676 that are part of if and while bodies. */
677 enum command_control_type
678 commands_from_control_command (char *arg
, struct command_line
*cmd
)
680 struct breakpoint
*b
;
684 /* If we allowed this, we would have problems with when to
685 free the storage, if we change the commands currently
688 if (executing_breakpoint_commands
)
689 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
691 /* An empty string for the breakpoint number means the last
692 breakpoint, but get_number expects a NULL pointer. */
697 bnum
= get_number (&p
);
700 error (_("Unexpected extra arguments following breakpoint number."));
703 if (b
->number
== bnum
)
705 free_command_lines (&b
->commands
);
706 if (cmd
->body_count
!= 1)
707 error (_("Invalid \"commands\" block structure."));
708 /* We need to copy the commands because if/while will free the
709 list after it finishes execution. */
710 b
->commands
= copy_command_lines (cmd
->body_list
[0]);
711 breakpoints_changed ();
712 breakpoint_modify_event (b
->number
);
713 return simple_control
;
715 error (_("No breakpoint number %d."), bnum
);
718 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
719 by replacing any memory breakpoints with their shadowed contents. */
722 breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
, LONGEST len
)
724 struct bp_location
*b
;
725 CORE_ADDR bp_addr
= 0;
731 if (b
->owner
->type
== bp_none
)
732 warning (_("reading through apparently deleted breakpoint #%d?"),
735 if (b
->loc_type
!= bp_loc_software_breakpoint
)
739 /* Addresses and length of the part of the breakpoint that
741 bp_addr
= b
->target_info
.placed_address
;
742 bp_size
= b
->target_info
.shadow_len
;
744 /* bp isn't valid, or doesn't shadow memory. */
747 if (bp_addr
+ bp_size
<= memaddr
)
748 /* The breakpoint is entirely before the chunk of memory we
752 if (bp_addr
>= memaddr
+ len
)
753 /* The breakpoint is entirely after the chunk of memory we are
757 /* Offset within shadow_contents. */
758 if (bp_addr
< memaddr
)
760 /* Only copy the second part of the breakpoint. */
761 bp_size
-= memaddr
- bp_addr
;
762 bptoffset
= memaddr
- bp_addr
;
766 if (bp_addr
+ bp_size
> memaddr
+ len
)
768 /* Only copy the first part of the breakpoint. */
769 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
772 memcpy (buf
+ bp_addr
- memaddr
,
773 b
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
778 /* A wrapper function for inserting catchpoints. */
780 insert_catchpoint (struct ui_out
*uo
, void *args
)
782 struct breakpoint
*b
= (struct breakpoint
*) args
;
788 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
791 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
794 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
797 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
803 is_hardware_watchpoint (struct breakpoint
*bpt
)
805 return (bpt
->type
== bp_hardware_watchpoint
806 || bpt
->type
== bp_read_watchpoint
807 || bpt
->type
== bp_access_watchpoint
);
810 /* Find the current value of a watchpoint on EXP. Return the value in
811 *VALP and *RESULTP and the chain of intermediate and final values
812 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
815 If an error occurs while evaluating the expression, *RESULTP will
816 be set to NULL. *RESULTP may be a lazy value, if the result could
817 not be read from memory. It is used to determine whether a value
818 is user-specified (we should watch the whole value) or intermediate
819 (we should watch only the bit used to locate the final value).
821 If the final value, or any intermediate value, could not be read
822 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
823 set to any referenced values. *VALP will never be a lazy value.
824 This is the value which we store in struct breakpoint.
826 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
827 value chain. The caller must free the values individually. If
828 VAL_CHAIN is NULL, all generated values will be left on the value
832 fetch_watchpoint_value (struct expression
*exp
, struct value
**valp
,
833 struct value
**resultp
, struct value
**val_chain
)
835 struct value
*mark
, *new_mark
, *result
;
843 /* Evaluate the expression. */
844 mark
= value_mark ();
846 gdb_evaluate_expression (exp
, &result
);
847 new_mark
= value_mark ();
848 if (mark
== new_mark
)
853 /* Make sure it's not lazy, so that after the target stops again we
854 have a non-lazy previous value to compare with. */
856 && (!value_lazy (result
) || gdb_value_fetch_lazy (result
)))
861 /* Return the chain of intermediate values. We use this to
862 decide which addresses to watch. */
863 *val_chain
= new_mark
;
864 value_release_to_mark (mark
);
868 /* Assuming that B is a hardware watchpoint:
869 - Reparse watchpoint expression, is REPARSE is non-zero
870 - Evaluate expression and store the result in B->val
871 - Update the list of values that must be watched in B->loc.
873 If the watchpoint is disabled, do nothing. If this is
874 local watchpoint that is out of scope, delete it. */
876 update_watchpoint (struct breakpoint
*b
, int reparse
)
878 int within_current_scope
;
879 struct frame_id saved_frame_id
;
880 struct bp_location
*loc
;
883 /* We don't free locations. They are stored in
884 bp_location_chain and update_global_locations will
885 eventually delete them and remove breakpoints if
889 if (b
->disposition
== disp_del_at_next_stop
)
892 /* Save the current frame's ID so we can restore it after
893 evaluating the watchpoint expression on its own frame. */
894 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
895 took a frame parameter, so that we didn't have to change the
897 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
899 /* Determine if the watchpoint is within scope. */
900 if (b
->exp_valid_block
== NULL
)
901 within_current_scope
= 1;
904 struct frame_info
*fi
;
905 fi
= frame_find_by_id (b
->watchpoint_frame
);
906 within_current_scope
= (fi
!= NULL
);
907 if (within_current_scope
)
911 if (within_current_scope
&& reparse
)
920 b
->exp
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
921 /* If the meaning of expression itself changed, the old value is
922 no longer relevant. We don't want to report a watchpoint hit
923 to the user when the old value and the new value may actually
924 be completely different objects. */
930 /* If we failed to parse the expression, for example because
931 it refers to a global variable in a not-yet-loaded shared library,
932 don't try to insert watchpoint. We don't automatically delete
933 such watchpoint, though, since failure to parse expression
934 is different from out-of-scope watchpoint. */
935 if (within_current_scope
&& b
->exp
)
937 struct value
*val_chain
, *v
, *result
, *next
;
939 fetch_watchpoint_value (b
->exp
, &v
, &result
, &val_chain
);
941 /* Avoid setting b->val if it's already set. The meaning of
942 b->val is 'the last value' user saw, and we should update
943 it only if we reported that last value to user. As it
944 happens, the code that reports it updates b->val directly. */
951 /* Look at each value on the value chain. */
952 for (v
= val_chain
; v
; v
= next
)
954 /* If it's a memory location, and GDB actually needed
955 its contents to evaluate the expression, then we
956 must watch it. If the first value returned is
957 still lazy, that means an error occurred reading it;
958 watch it anyway in case it becomes readable. */
959 if (VALUE_LVAL (v
) == lval_memory
960 && (v
== val_chain
|| ! value_lazy (v
)))
962 struct type
*vtype
= check_typedef (value_type (v
));
964 /* We only watch structs and arrays if user asked
965 for it explicitly, never if they just happen to
966 appear in the middle of some value chain. */
968 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
969 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
973 struct bp_location
*loc
, **tmp
;
975 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
976 len
= TYPE_LENGTH (value_type (v
));
978 if (b
->type
== bp_read_watchpoint
)
980 else if (b
->type
== bp_access_watchpoint
)
983 loc
= allocate_bp_location (b
, bp_hardware_watchpoint
);
984 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
989 loc
->watchpoint_type
= type
;
993 next
= value_next (v
);
998 /* We just regenerated the list of breakpoint locations.
999 The new location does not have its condition field set to anything
1000 and therefore, we must always reparse the cond_string, independently
1001 of the value of the reparse flag. */
1002 if (b
->cond_string
!= NULL
)
1004 char *s
= b
->cond_string
;
1005 b
->loc
->cond
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
1008 else if (!within_current_scope
)
1010 printf_filtered (_("\
1011 Hardware watchpoint %d deleted because the program has left the block \n\
1012 in which its expression is valid.\n"),
1014 if (b
->related_breakpoint
)
1015 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1016 b
->disposition
= disp_del_at_next_stop
;
1019 /* Restore the selected frame. */
1020 select_frame (frame_find_by_id (saved_frame_id
));
1024 /* Returns 1 iff breakpoint location should be
1025 inserted in the inferior. */
1027 should_be_inserted (struct bp_location
*bpt
)
1029 if (!breakpoint_enabled (bpt
->owner
))
1032 if (bpt
->owner
->disposition
== disp_del_at_next_stop
)
1035 if (!bpt
->enabled
|| bpt
->shlib_disabled
|| bpt
->duplicate
)
1041 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1042 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1043 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
1045 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1046 method for each breakpoint or catchpoint type. */
1048 insert_bp_location (struct bp_location
*bpt
,
1049 struct ui_file
*tmp_error_stream
,
1050 int *disabled_breaks
, int *process_warning
,
1051 int *hw_breakpoint_error
)
1055 if (!should_be_inserted (bpt
) || bpt
->inserted
)
1058 /* Initialize the target-specific information. */
1059 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
1060 bpt
->target_info
.placed_address
= bpt
->address
;
1062 if (bpt
->loc_type
== bp_loc_software_breakpoint
1063 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1065 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
1067 /* If the explicitly specified breakpoint type
1068 is not hardware breakpoint, check the memory map to see
1069 if the breakpoint address is in read only memory or not.
1070 Two important cases are:
1071 - location type is not hardware breakpoint, memory
1072 is readonly. We change the type of the location to
1073 hardware breakpoint.
1074 - location type is hardware breakpoint, memory is read-write.
1075 This means we've previously made the location hardware one, but
1076 then the memory map changed, so we undo.
1078 When breakpoints are removed, remove_breakpoints will
1079 use location types we've just set here, the only possible
1080 problem is that memory map has changed during running program,
1081 but it's not going to work anyway with current gdb. */
1082 struct mem_region
*mr
1083 = lookup_mem_region (bpt
->target_info
.placed_address
);
1087 if (automatic_hardware_breakpoints
)
1090 enum bp_loc_type new_type
;
1092 if (mr
->attrib
.mode
!= MEM_RW
)
1093 new_type
= bp_loc_hardware_breakpoint
;
1095 new_type
= bp_loc_software_breakpoint
;
1097 if (new_type
!= bpt
->loc_type
)
1099 static int said
= 0;
1100 bpt
->loc_type
= new_type
;
1103 fprintf_filtered (gdb_stdout
, _("\
1104 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1109 else if (bpt
->loc_type
== bp_loc_software_breakpoint
1110 && mr
->attrib
.mode
!= MEM_RW
)
1111 warning (_("cannot set software breakpoint at readonly address %s"),
1112 paddr (bpt
->address
));
1116 /* First check to see if we have to handle an overlay. */
1117 if (overlay_debugging
== ovly_off
1118 || bpt
->section
== NULL
1119 || !(section_is_overlay (bpt
->section
)))
1121 /* No overlay handling: just set the breakpoint. */
1123 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1124 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1126 val
= target_insert_breakpoint (&bpt
->target_info
);
1130 /* This breakpoint is in an overlay section.
1131 Shall we set a breakpoint at the LMA? */
1132 if (!overlay_events_enabled
)
1134 /* Yes -- overlay event support is not active,
1135 so we must try to set a breakpoint at the LMA.
1136 This will not work for a hardware breakpoint. */
1137 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1138 warning (_("hardware breakpoint %d not supported in overlay!"),
1139 bpt
->owner
->number
);
1142 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
1144 /* Set a software (trap) breakpoint at the LMA. */
1145 bpt
->overlay_target_info
= bpt
->target_info
;
1146 bpt
->overlay_target_info
.placed_address
= addr
;
1147 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
1149 fprintf_unfiltered (tmp_error_stream
,
1150 "Overlay breakpoint %d failed: in ROM?",
1151 bpt
->owner
->number
);
1154 /* Shall we set a breakpoint at the VMA? */
1155 if (section_is_mapped (bpt
->section
))
1157 /* Yes. This overlay section is mapped into memory. */
1158 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1159 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1161 val
= target_insert_breakpoint (&bpt
->target_info
);
1165 /* No. This breakpoint will not be inserted.
1166 No error, but do not mark the bp as 'inserted'. */
1173 /* Can't set the breakpoint. */
1174 if (solib_address (bpt
->address
))
1176 /* See also: disable_breakpoints_in_shlibs. */
1178 bpt
->shlib_disabled
= 1;
1179 if (!*disabled_breaks
)
1181 fprintf_unfiltered (tmp_error_stream
,
1182 "Cannot insert breakpoint %d.\n",
1183 bpt
->owner
->number
);
1184 fprintf_unfiltered (tmp_error_stream
,
1185 "Temporarily disabling shared library breakpoints:\n");
1187 *disabled_breaks
= 1;
1188 fprintf_unfiltered (tmp_error_stream
,
1189 "breakpoint #%d\n", bpt
->owner
->number
);
1193 #ifdef ONE_PROCESS_WRITETEXT
1194 *process_warning
= 1;
1196 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1198 *hw_breakpoint_error
= 1;
1199 fprintf_unfiltered (tmp_error_stream
,
1200 "Cannot insert hardware breakpoint %d.\n",
1201 bpt
->owner
->number
);
1205 fprintf_unfiltered (tmp_error_stream
,
1206 "Cannot insert breakpoint %d.\n",
1207 bpt
->owner
->number
);
1208 fprintf_filtered (tmp_error_stream
,
1209 "Error accessing memory address ");
1210 fputs_filtered (paddress (bpt
->address
), tmp_error_stream
);
1211 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1212 safe_strerror (val
));
1223 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
1224 /* NOTE drow/2003-09-08: This state only exists for removing
1225 watchpoints. It's not clear that it's necessary... */
1226 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
1228 val
= target_insert_watchpoint (bpt
->address
,
1230 bpt
->watchpoint_type
);
1231 bpt
->inserted
= (val
!= -1);
1234 else if (bpt
->owner
->type
== bp_catch_fork
1235 || bpt
->owner
->type
== bp_catch_vfork
1236 || bpt
->owner
->type
== bp_catch_exec
)
1238 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1239 bpt
->owner
, RETURN_MASK_ERROR
);
1240 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1241 bpt
->owner
->number
);
1243 bpt
->owner
->enable_state
= bp_disabled
;
1247 /* We've already printed an error message if there was a problem
1248 inserting this catchpoint, and we've disabled the catchpoint,
1249 so just return success. */
1256 /* Make sure all breakpoints are inserted in inferior.
1257 Throws exception on any error.
1258 A breakpoint that is already inserted won't be inserted
1259 again, so calling this function twice is safe. */
1261 insert_breakpoints (void)
1263 struct breakpoint
*bpt
;
1265 ALL_BREAKPOINTS (bpt
)
1266 if (is_hardware_watchpoint (bpt
))
1267 update_watchpoint (bpt
, 0 /* don't reparse. */);
1269 update_global_location_list ();
1271 if (!always_inserted_mode
&& target_has_execution
)
1272 /* update_global_location_list does not insert breakpoints
1273 when always_inserted_mode is not enabled. Explicitly
1275 insert_breakpoint_locations ();
1278 /* insert_breakpoints is used when starting or continuing the program.
1279 remove_breakpoints is used when the program stops.
1280 Both return zero if successful,
1281 or an `errno' value if could not write the inferior. */
1284 insert_breakpoint_locations (void)
1286 struct breakpoint
*bpt
;
1287 struct bp_location
*b
, *temp
;
1290 int disabled_breaks
= 0;
1291 int hw_breakpoint_error
= 0;
1292 int process_warning
= 0;
1294 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1295 make_cleanup_ui_file_delete (tmp_error_stream
);
1297 /* Explicitly mark the warning -- this will only be printed if
1298 there was an error. */
1299 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1301 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1303 if (!should_be_inserted (b
) || b
->inserted
)
1306 /* There is no point inserting thread-specific breakpoints if the
1307 thread no longer exists. */
1308 if (b
->owner
->thread
!= -1
1309 && !valid_thread_id (b
->owner
->thread
))
1312 val
= insert_bp_location (b
, tmp_error_stream
,
1313 &disabled_breaks
, &process_warning
,
1314 &hw_breakpoint_error
);
1319 /* If we failed to insert all locations of a watchpoint,
1320 remove them, as half-inserted watchpoint is of limited use. */
1321 ALL_BREAKPOINTS (bpt
)
1323 int some_failed
= 0;
1324 struct bp_location
*loc
;
1326 if (!is_hardware_watchpoint (bpt
))
1329 if (bpt
->enable_state
!= bp_enabled
)
1332 if (bpt
->disposition
== disp_del_at_next_stop
)
1335 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1343 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1345 remove_breakpoint (loc
, mark_uninserted
);
1347 hw_breakpoint_error
= 1;
1348 fprintf_unfiltered (tmp_error_stream
,
1349 "Could not insert hardware watchpoint %d.\n",
1357 /* If a hardware breakpoint or watchpoint was inserted, add a
1358 message about possibly exhausted resources. */
1359 if (hw_breakpoint_error
)
1361 fprintf_unfiltered (tmp_error_stream
,
1362 "Could not insert hardware breakpoints:\n\
1363 You may have requested too many hardware breakpoints/watchpoints.\n");
1365 #ifdef ONE_PROCESS_WRITETEXT
1366 if (process_warning
)
1367 fprintf_unfiltered (tmp_error_stream
,
1368 "The same program may be running in another process.");
1370 target_terminal_ours_for_output ();
1371 error_stream (tmp_error_stream
);
1376 remove_breakpoints (void)
1378 struct bp_location
*b
;
1381 ALL_BP_LOCATIONS (b
)
1385 val
= remove_breakpoint (b
, mark_uninserted
);
1394 remove_hw_watchpoints (void)
1396 struct bp_location
*b
;
1399 ALL_BP_LOCATIONS (b
)
1401 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1403 val
= remove_breakpoint (b
, mark_uninserted
);
1412 reattach_breakpoints (int pid
)
1414 struct bp_location
*b
;
1416 struct cleanup
*old_chain
= save_inferior_ptid ();
1417 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1418 int dummy1
= 0, dummy2
= 0, dummy3
= 0;
1420 make_cleanup_ui_file_delete (tmp_error_stream
);
1422 inferior_ptid
= pid_to_ptid (pid
);
1423 ALL_BP_LOCATIONS (b
)
1428 val
= insert_bp_location (b
, tmp_error_stream
,
1429 &dummy1
, &dummy2
, &dummy3
);
1432 do_cleanups (old_chain
);
1437 do_cleanups (old_chain
);
1442 update_breakpoints_after_exec (void)
1444 struct breakpoint
*b
;
1445 struct breakpoint
*temp
;
1446 struct cleanup
*cleanup
;
1448 /* Doing this first prevents the badness of having delete_breakpoint()
1449 write a breakpoint's current "shadow contents" to lift the bp. That
1450 shadow is NOT valid after an exec()! */
1451 mark_breakpoints_out ();
1453 /* The binary we used to debug is now gone, and we're updating
1454 breakpoints for the new binary. Until we're done, we should not
1455 try to insert breakpoints. */
1456 cleanup
= make_cleanup_restore_integer (&always_inserted_mode
);
1457 always_inserted_mode
= 0;
1459 ALL_BREAKPOINTS_SAFE (b
, temp
)
1461 /* Solib breakpoints must be explicitly reset after an exec(). */
1462 if (b
->type
== bp_shlib_event
)
1464 delete_breakpoint (b
);
1468 /* Thread event breakpoints must be set anew after an exec(),
1469 as must overlay event breakpoints. */
1470 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1472 delete_breakpoint (b
);
1476 /* Step-resume breakpoints are meaningless after an exec(). */
1477 if (b
->type
== bp_step_resume
)
1479 delete_breakpoint (b
);
1483 /* Longjmp and longjmp-resume breakpoints are also meaningless
1485 if (b
->type
== bp_longjmp
|| b
->type
== bp_longjmp_resume
)
1487 delete_breakpoint (b
);
1491 /* Don't delete an exec catchpoint, because else the inferior
1492 won't stop when it ought!
1494 Similarly, we probably ought to keep vfork catchpoints, 'cause
1495 on this target, we may not be able to stop when the vfork is
1496 seen, but only when the subsequent exec is seen. (And because
1497 deleting fork catchpoints here but not vfork catchpoints will
1498 seem mysterious to users, keep those too.) */
1499 if ((b
->type
== bp_catch_exec
) ||
1500 (b
->type
== bp_catch_vfork
) ||
1501 (b
->type
== bp_catch_fork
))
1506 /* bp_finish is a special case. The only way we ought to be able
1507 to see one of these when an exec() has happened, is if the user
1508 caught a vfork, and then said "finish". Ordinarily a finish just
1509 carries them to the call-site of the current callee, by setting
1510 a temporary bp there and resuming. But in this case, the finish
1511 will carry them entirely through the vfork & exec.
1513 We don't want to allow a bp_finish to remain inserted now. But
1514 we can't safely delete it, 'cause finish_command has a handle to
1515 the bp on a bpstat, and will later want to delete it. There's a
1516 chance (and I've seen it happen) that if we delete the bp_finish
1517 here, that its storage will get reused by the time finish_command
1518 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1519 We really must allow finish_command to delete a bp_finish.
1521 In the absense of a general solution for the "how do we know
1522 it's safe to delete something others may have handles to?"
1523 problem, what we'll do here is just uninsert the bp_finish, and
1524 let finish_command delete it.
1526 (We know the bp_finish is "doomed" in the sense that it's
1527 momentary, and will be deleted as soon as finish_command sees
1528 the inferior stopped. So it doesn't matter that the bp's
1529 address is probably bogus in the new a.out, unlike e.g., the
1530 solib breakpoints.) */
1532 if (b
->type
== bp_finish
)
1537 /* Without a symbolic address, we have little hope of the
1538 pre-exec() address meaning the same thing in the post-exec()
1540 if (b
->addr_string
== NULL
)
1542 delete_breakpoint (b
);
1546 /* FIXME what about longjmp breakpoints? Re-create them here? */
1547 create_overlay_event_breakpoint ("_ovly_debug_event");
1548 do_cleanups (cleanup
);
1552 detach_breakpoints (int pid
)
1554 struct bp_location
*b
;
1556 struct cleanup
*old_chain
= save_inferior_ptid ();
1558 if (pid
== PIDGET (inferior_ptid
))
1559 error (_("Cannot detach breakpoints of inferior_ptid"));
1561 /* Set inferior_ptid; remove_breakpoint uses this global. */
1562 inferior_ptid
= pid_to_ptid (pid
);
1563 ALL_BP_LOCATIONS (b
)
1567 val
= remove_breakpoint (b
, mark_inserted
);
1570 do_cleanups (old_chain
);
1575 do_cleanups (old_chain
);
1580 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1584 if (b
->owner
->enable_state
== bp_permanent
)
1585 /* Permanent breakpoints cannot be inserted or removed. */
1588 /* The type of none suggests that owner is actually deleted.
1589 This should not ever happen. */
1590 gdb_assert (b
->owner
->type
!= bp_none
);
1592 if (b
->loc_type
== bp_loc_software_breakpoint
1593 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1595 /* "Normal" instruction breakpoint: either the standard
1596 trap-instruction bp (bp_breakpoint), or a
1597 bp_hardware_breakpoint. */
1599 /* First check to see if we have to handle an overlay. */
1600 if (overlay_debugging
== ovly_off
1601 || b
->section
== NULL
1602 || !(section_is_overlay (b
->section
)))
1604 /* No overlay handling: just remove the breakpoint. */
1606 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1607 val
= target_remove_hw_breakpoint (&b
->target_info
);
1609 val
= target_remove_breakpoint (&b
->target_info
);
1613 /* This breakpoint is in an overlay section.
1614 Did we set a breakpoint at the LMA? */
1615 if (!overlay_events_enabled
)
1617 /* Yes -- overlay event support is not active, so we
1618 should have set a breakpoint at the LMA. Remove it.
1620 /* Ignore any failures: if the LMA is in ROM, we will
1621 have already warned when we failed to insert it. */
1622 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1623 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1625 target_remove_breakpoint (&b
->overlay_target_info
);
1627 /* Did we set a breakpoint at the VMA?
1628 If so, we will have marked the breakpoint 'inserted'. */
1631 /* Yes -- remove it. Previously we did not bother to
1632 remove the breakpoint if the section had been
1633 unmapped, but let's not rely on that being safe. We
1634 don't know what the overlay manager might do. */
1635 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1636 val
= target_remove_hw_breakpoint (&b
->target_info
);
1638 /* However, we should remove *software* breakpoints only
1639 if the section is still mapped, or else we overwrite
1640 wrong code with the saved shadow contents. */
1641 else if (section_is_mapped (b
->section
))
1642 val
= target_remove_breakpoint (&b
->target_info
);
1648 /* No -- not inserted, so no need to remove. No error. */
1654 b
->inserted
= (is
== mark_inserted
);
1656 else if (b
->loc_type
== bp_loc_hardware_watchpoint
)
1661 b
->inserted
= (is
== mark_inserted
);
1662 val
= target_remove_watchpoint (b
->address
, b
->length
,
1663 b
->watchpoint_type
);
1665 /* Failure to remove any of the hardware watchpoints comes here. */
1666 if ((is
== mark_uninserted
) && (b
->inserted
))
1667 warning (_("Could not remove hardware watchpoint %d."),
1670 else if ((b
->owner
->type
== bp_catch_fork
||
1671 b
->owner
->type
== bp_catch_vfork
||
1672 b
->owner
->type
== bp_catch_exec
)
1673 && breakpoint_enabled (b
->owner
)
1677 switch (b
->owner
->type
)
1680 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1682 case bp_catch_vfork
:
1683 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1686 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1689 warning (_("Internal error, %s line %d."), __FILE__
, __LINE__
);
1694 b
->inserted
= (is
== mark_inserted
);
1700 /* Clear the "inserted" flag in all breakpoints. */
1703 mark_breakpoints_out (void)
1705 struct bp_location
*bpt
;
1707 ALL_BP_LOCATIONS (bpt
)
1711 /* Clear the "inserted" flag in all breakpoints and delete any
1712 breakpoints which should go away between runs of the program.
1714 Plus other such housekeeping that has to be done for breakpoints
1717 Note: this function gets called at the end of a run (by
1718 generic_mourn_inferior) and when a run begins (by
1719 init_wait_for_inferior). */
1724 breakpoint_init_inferior (enum inf_context context
)
1726 struct breakpoint
*b
, *temp
;
1727 struct bp_location
*bpt
;
1729 ALL_BP_LOCATIONS (bpt
)
1732 ALL_BREAKPOINTS_SAFE (b
, temp
)
1737 case bp_watchpoint_scope
:
1739 /* If the call dummy breakpoint is at the entry point it will
1740 cause problems when the inferior is rerun, so we better
1743 Also get rid of scope breakpoints. */
1744 delete_breakpoint (b
);
1748 case bp_hardware_watchpoint
:
1749 case bp_read_watchpoint
:
1750 case bp_access_watchpoint
:
1752 /* Likewise for watchpoints on local expressions. */
1753 if (b
->exp_valid_block
!= NULL
)
1754 delete_breakpoint (b
);
1755 else if (context
== inf_starting
)
1757 /* Reset val field to force reread of starting value
1758 in insert_breakpoints. */
1760 value_free (b
->val
);
1771 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1772 exists at PC. It returns ordinary_breakpoint_here if it's an
1773 ordinary breakpoint, or permanent_breakpoint_here if it's a
1774 permanent breakpoint.
1775 - When continuing from a location with an ordinary breakpoint, we
1776 actually single step once before calling insert_breakpoints.
1777 - When continuing from a localion with a permanent breakpoint, we
1778 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1779 the target, to advance the PC past the breakpoint. */
1781 enum breakpoint_here
1782 breakpoint_here_p (CORE_ADDR pc
)
1784 const struct bp_location
*bpt
;
1785 int any_breakpoint_here
= 0;
1787 ALL_BP_LOCATIONS (bpt
)
1789 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1790 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1793 if ((breakpoint_enabled (bpt
->owner
)
1794 || bpt
->owner
->enable_state
== bp_permanent
)
1795 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1797 if (overlay_debugging
1798 && section_is_overlay (bpt
->section
)
1799 && !section_is_mapped (bpt
->section
))
1800 continue; /* unmapped overlay -- can't be a match */
1801 else if (bpt
->owner
->enable_state
== bp_permanent
)
1802 return permanent_breakpoint_here
;
1804 any_breakpoint_here
= 1;
1808 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1812 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1813 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1814 This does not check for single-step breakpoints, which are
1815 inserted and removed using direct target manipulation. */
1818 regular_breakpoint_inserted_here_p (CORE_ADDR pc
)
1820 const struct bp_location
*bpt
;
1822 ALL_BP_LOCATIONS (bpt
)
1824 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1825 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1829 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1831 if (overlay_debugging
1832 && section_is_overlay (bpt
->section
)
1833 && !section_is_mapped (bpt
->section
))
1834 continue; /* unmapped overlay -- can't be a match */
1842 /* Returns non-zero iff there's either regular breakpoint
1843 or a single step breakpoint inserted at PC. */
1846 breakpoint_inserted_here_p (CORE_ADDR pc
)
1848 if (regular_breakpoint_inserted_here_p (pc
))
1851 if (single_step_breakpoint_inserted_here_p (pc
))
1857 /* This function returns non-zero iff there is a software breakpoint
1861 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1863 const struct bp_location
*bpt
;
1864 int any_breakpoint_here
= 0;
1866 ALL_BP_LOCATIONS (bpt
)
1868 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1872 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1874 if (overlay_debugging
1875 && section_is_overlay (bpt
->section
)
1876 && !section_is_mapped (bpt
->section
))
1877 continue; /* unmapped overlay -- can't be a match */
1883 /* Also check for software single-step breakpoints. */
1884 if (single_step_breakpoint_inserted_here_p (pc
))
1890 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1891 PC is valid for process/thread PTID. */
1894 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1896 const struct bp_location
*bpt
;
1899 thread
= pid_to_thread_id (ptid
);
1901 ALL_BP_LOCATIONS (bpt
)
1903 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1904 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1907 if ((breakpoint_enabled (bpt
->owner
)
1908 || bpt
->owner
->enable_state
== bp_permanent
)
1909 && bpt
->address
== pc
1910 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1912 if (overlay_debugging
1913 && section_is_overlay (bpt
->section
)
1914 && !section_is_mapped (bpt
->section
))
1915 continue; /* unmapped overlay -- can't be a match */
1925 /* bpstat stuff. External routines' interfaces are documented
1929 ep_is_catchpoint (struct breakpoint
*ep
)
1932 (ep
->type
== bp_catch_load
)
1933 || (ep
->type
== bp_catch_unload
)
1934 || (ep
->type
== bp_catch_fork
)
1935 || (ep
->type
== bp_catch_vfork
)
1936 || (ep
->type
== bp_catch_exec
);
1938 /* ??rehrauer: Add more kinds here, as are implemented... */
1942 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1945 (ep
->type
== bp_catch_load
)
1946 || (ep
->type
== bp_catch_unload
);
1950 bpstat_free (bpstat bs
)
1952 if (bs
->old_val
!= NULL
)
1953 value_free (bs
->old_val
);
1954 free_command_lines (&bs
->commands
);
1958 /* Clear a bpstat so that it says we are not at any breakpoint.
1959 Also free any storage that is part of a bpstat. */
1962 bpstat_clear (bpstat
*bsp
)
1979 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1980 is part of the bpstat is copied as well. */
1983 bpstat_copy (bpstat bs
)
1987 bpstat retval
= NULL
;
1992 for (; bs
!= NULL
; bs
= bs
->next
)
1994 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1995 memcpy (tmp
, bs
, sizeof (*tmp
));
1996 if (bs
->commands
!= NULL
)
1997 tmp
->commands
= copy_command_lines (bs
->commands
);
1998 if (bs
->old_val
!= NULL
)
1999 tmp
->old_val
= value_copy (bs
->old_val
);
2002 /* This is the first thing in the chain. */
2012 /* Find the bpstat associated with this breakpoint */
2015 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
2020 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2022 if (bsp
->breakpoint_at
&& bsp
->breakpoint_at
->owner
== breakpoint
)
2028 /* Find a step_resume breakpoint associated with this bpstat.
2029 (If there are multiple step_resume bp's on the list, this function
2030 will arbitrarily pick one.)
2032 It is an error to use this function if BPSTAT doesn't contain a
2033 step_resume breakpoint.
2035 See wait_for_inferior's use of this function. */
2037 bpstat_find_step_resume_breakpoint (bpstat bsp
)
2041 gdb_assert (bsp
!= NULL
);
2043 current_thread
= pid_to_thread_id (inferior_ptid
);
2045 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2047 if ((bsp
->breakpoint_at
!= NULL
) &&
2048 (bsp
->breakpoint_at
->owner
->type
== bp_step_resume
) &&
2049 (bsp
->breakpoint_at
->owner
->thread
== current_thread
||
2050 bsp
->breakpoint_at
->owner
->thread
== -1))
2051 return bsp
->breakpoint_at
->owner
;
2054 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2058 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2059 at. *BSP upon return is a bpstat which points to the remaining
2060 breakpoints stopped at (but which is not guaranteed to be good for
2061 anything but further calls to bpstat_num).
2062 Return 0 if passed a bpstat which does not indicate any breakpoints.
2063 Return -1 if stopped at a breakpoint that has been deleted since
2065 Return 1 otherwise. */
2068 bpstat_num (bpstat
*bsp
, int *num
)
2070 struct breakpoint
*b
;
2073 return 0; /* No more breakpoint values */
2075 /* We assume we'll never have several bpstats that
2076 correspond to a single breakpoint -- otherwise,
2077 this function might return the same number more
2078 than once and this will look ugly. */
2079 b
= (*bsp
)->breakpoint_at
? (*bsp
)->breakpoint_at
->owner
: NULL
;
2080 *bsp
= (*bsp
)->next
;
2082 return -1; /* breakpoint that's been deleted since */
2084 *num
= b
->number
; /* We have its number */
2088 /* Modify BS so that the actions will not be performed. */
2091 bpstat_clear_actions (bpstat bs
)
2093 for (; bs
!= NULL
; bs
= bs
->next
)
2095 free_command_lines (&bs
->commands
);
2096 if (bs
->old_val
!= NULL
)
2098 value_free (bs
->old_val
);
2104 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2106 cleanup_executing_breakpoints (void *ignore
)
2108 executing_breakpoint_commands
= 0;
2111 /* Execute all the commands associated with all the breakpoints at this
2112 location. Any of these commands could cause the process to proceed
2113 beyond this point, etc. We look out for such changes by checking
2114 the global "breakpoint_proceeded" after each command. */
2117 bpstat_do_actions (bpstat
*bsp
)
2120 struct cleanup
*old_chain
;
2122 /* Avoid endless recursion if a `source' command is contained
2124 if (executing_breakpoint_commands
)
2127 executing_breakpoint_commands
= 1;
2128 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2131 /* Note that (as of this writing), our callers all appear to
2132 be passing us the address of global stop_bpstat. And, if
2133 our calls to execute_control_command cause the inferior to
2134 proceed, that global (and hence, *bsp) will change.
2136 We must be careful to not touch *bsp unless the inferior
2137 has not proceeded. */
2139 /* This pointer will iterate over the list of bpstat's. */
2142 breakpoint_proceeded
= 0;
2143 for (; bs
!= NULL
; bs
= bs
->next
)
2145 struct command_line
*cmd
;
2146 struct cleanup
*this_cmd_tree_chain
;
2148 /* Take ownership of the BSP's command tree, if it has one.
2150 The command tree could legitimately contain commands like
2151 'step' and 'next', which call clear_proceed_status, which
2152 frees stop_bpstat's command tree. To make sure this doesn't
2153 free the tree we're executing out from under us, we need to
2154 take ownership of the tree ourselves. Since a given bpstat's
2155 commands are only executed once, we don't need to copy it; we
2156 can clear the pointer in the bpstat, and make sure we free
2157 the tree when we're done. */
2160 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2164 execute_control_command (cmd
);
2166 if (breakpoint_proceeded
)
2172 /* We can free this command tree now. */
2173 do_cleanups (this_cmd_tree_chain
);
2175 if (breakpoint_proceeded
)
2177 if (target_can_async_p ())
2178 /* If we are in async mode, then the target might
2179 be still running, not stopped at any breakpoint,
2180 so nothing for us to do here -- just return to
2184 /* In sync mode, when execute_control_command returns
2185 we're already standing on the next breakpoint.
2186 Breakpoint commands for that stop were not run,
2187 since execute_command does not run breakpoint
2188 commands -- only command_line_handler does, but
2189 that one is not involved in execution of breakpoint
2190 commands. So, we can now execute breakpoint commands.
2191 There's an implicit assumption that we're called with
2192 stop_bpstat, so our parameter is the new bpstat to
2194 It should be noted that making execute_command do
2195 bpstat actions is not an option -- in this case we'll
2196 have recursive invocation of bpstat for each breakpoint
2197 with a command, and can easily blow up GDB stack. */
2201 do_cleanups (old_chain
);
2204 /* Print out the (old or new) value associated with a watchpoint. */
2207 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2210 fprintf_unfiltered (stream
, _("<unreadable>"));
2212 value_print (val
, stream
, 0, Val_pretty_default
);
2215 /* This is the normal print function for a bpstat. In the future,
2216 much of this logic could (should?) be moved to bpstat_stop_status,
2217 by having it set different print_it values.
2219 Current scheme: When we stop, bpstat_print() is called. It loops
2220 through the bpstat list of things causing this stop, calling the
2221 print_bp_stop_message function on each one. The behavior of the
2222 print_bp_stop_message function depends on the print_it field of
2223 bpstat. If such field so indicates, call this function here.
2225 Return values from this routine (ultimately used by bpstat_print()
2226 and normal_stop() to decide what to do):
2227 PRINT_NOTHING: Means we already printed all we needed to print,
2228 don't print anything else.
2229 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2230 that something to be followed by a location.
2231 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2232 that something to be followed by a location.
2233 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2236 static enum print_stop_action
2237 print_it_typical (bpstat bs
)
2239 struct cleanup
*old_chain
, *ui_out_chain
;
2240 struct breakpoint
*b
;
2241 const struct bp_location
*bl
;
2242 struct ui_stream
*stb
;
2244 stb
= ui_out_stream_new (uiout
);
2245 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2246 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2247 which has since been deleted. */
2248 if (bs
->breakpoint_at
== NULL
)
2249 return PRINT_UNKNOWN
;
2250 bl
= bs
->breakpoint_at
;
2256 case bp_hardware_breakpoint
:
2257 bp_temp
= bs
->breakpoint_at
->owner
->disposition
== disp_del
;
2258 if (bl
->address
!= bl
->requested_address
)
2259 breakpoint_adjustment_warning (bl
->requested_address
,
2262 annotate_breakpoint (b
->number
);
2264 ui_out_text (uiout
, "\nTemporary breakpoint ");
2266 ui_out_text (uiout
, "\nBreakpoint ");
2267 if (ui_out_is_mi_like_p (uiout
))
2269 ui_out_field_string (uiout
, "reason",
2270 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2271 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
2273 ui_out_field_int (uiout
, "bkptno", b
->number
);
2274 ui_out_text (uiout
, ", ");
2275 return PRINT_SRC_AND_LOC
;
2278 case bp_shlib_event
:
2279 /* Did we stop because the user set the stop_on_solib_events
2280 variable? (If so, we report this as a generic, "Stopped due
2281 to shlib event" message.) */
2282 printf_filtered (_("Stopped due to shared library event\n"));
2283 return PRINT_NOTHING
;
2286 case bp_thread_event
:
2287 /* Not sure how we will get here.
2288 GDB should not stop for these breakpoints. */
2289 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2290 return PRINT_NOTHING
;
2293 case bp_overlay_event
:
2294 /* By analogy with the thread event, GDB should not stop for these. */
2295 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2296 return PRINT_NOTHING
;
2300 annotate_catchpoint (b
->number
);
2301 printf_filtered (_("\nCatchpoint %d (loaded %s), "),
2303 b
->triggered_dll_pathname
);
2304 return PRINT_SRC_AND_LOC
;
2307 case bp_catch_unload
:
2308 annotate_catchpoint (b
->number
);
2309 printf_filtered (_("\nCatchpoint %d (unloaded %s), "),
2311 b
->triggered_dll_pathname
);
2312 return PRINT_SRC_AND_LOC
;
2316 annotate_catchpoint (b
->number
);
2317 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
2319 b
->forked_inferior_pid
);
2320 return PRINT_SRC_AND_LOC
;
2323 case bp_catch_vfork
:
2324 annotate_catchpoint (b
->number
);
2325 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
2327 b
->forked_inferior_pid
);
2328 return PRINT_SRC_AND_LOC
;
2332 annotate_catchpoint (b
->number
);
2333 printf_filtered (_("\nCatchpoint %d (exec'd %s), "),
2336 return PRINT_SRC_AND_LOC
;
2340 case bp_hardware_watchpoint
:
2341 annotate_watchpoint (b
->number
);
2342 if (ui_out_is_mi_like_p (uiout
))
2345 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2347 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2348 ui_out_text (uiout
, "\nOld value = ");
2349 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2350 ui_out_field_stream (uiout
, "old", stb
);
2351 ui_out_text (uiout
, "\nNew value = ");
2352 watchpoint_value_print (b
->val
, stb
->stream
);
2353 ui_out_field_stream (uiout
, "new", stb
);
2354 do_cleanups (ui_out_chain
);
2355 ui_out_text (uiout
, "\n");
2356 /* More than one watchpoint may have been triggered. */
2357 return PRINT_UNKNOWN
;
2360 case bp_read_watchpoint
:
2361 if (ui_out_is_mi_like_p (uiout
))
2364 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2366 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2367 ui_out_text (uiout
, "\nValue = ");
2368 watchpoint_value_print (b
->val
, stb
->stream
);
2369 ui_out_field_stream (uiout
, "value", stb
);
2370 do_cleanups (ui_out_chain
);
2371 ui_out_text (uiout
, "\n");
2372 return PRINT_UNKNOWN
;
2375 case bp_access_watchpoint
:
2376 if (bs
->old_val
!= NULL
)
2378 annotate_watchpoint (b
->number
);
2379 if (ui_out_is_mi_like_p (uiout
))
2382 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2384 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2385 ui_out_text (uiout
, "\nOld value = ");
2386 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2387 ui_out_field_stream (uiout
, "old", stb
);
2388 ui_out_text (uiout
, "\nNew value = ");
2393 if (ui_out_is_mi_like_p (uiout
))
2396 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2397 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2398 ui_out_text (uiout
, "\nValue = ");
2400 watchpoint_value_print (b
->val
, stb
->stream
);
2401 ui_out_field_stream (uiout
, "new", stb
);
2402 do_cleanups (ui_out_chain
);
2403 ui_out_text (uiout
, "\n");
2404 return PRINT_UNKNOWN
;
2407 /* Fall through, we don't deal with these types of breakpoints
2411 if (ui_out_is_mi_like_p (uiout
))
2414 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2415 return PRINT_UNKNOWN
;
2419 if (ui_out_is_mi_like_p (uiout
))
2422 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2423 return PRINT_UNKNOWN
;
2428 case bp_longjmp_resume
:
2429 case bp_step_resume
:
2430 case bp_watchpoint_scope
:
2433 return PRINT_UNKNOWN
;
2437 /* Generic routine for printing messages indicating why we
2438 stopped. The behavior of this function depends on the value
2439 'print_it' in the bpstat structure. Under some circumstances we
2440 may decide not to print anything here and delegate the task to
2443 static enum print_stop_action
2444 print_bp_stop_message (bpstat bs
)
2446 switch (bs
->print_it
)
2449 /* Nothing should be printed for this bpstat entry. */
2450 return PRINT_UNKNOWN
;
2454 /* We still want to print the frame, but we already printed the
2455 relevant messages. */
2456 return PRINT_SRC_AND_LOC
;
2459 case print_it_normal
:
2461 const struct bp_location
*bl
= bs
->breakpoint_at
;
2462 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2464 /* Normal case. Call the breakpoint's print_it method, or
2465 print_it_typical. */
2466 /* FIXME: how breakpoint can ever be NULL here? */
2467 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2468 return b
->ops
->print_it (b
);
2470 return print_it_typical (bs
);
2475 internal_error (__FILE__
, __LINE__
,
2476 _("print_bp_stop_message: unrecognized enum value"));
2481 /* Print a message indicating what happened. This is called from
2482 normal_stop(). The input to this routine is the head of the bpstat
2483 list - a list of the eventpoints that caused this stop. This
2484 routine calls the generic print routine for printing a message
2485 about reasons for stopping. This will print (for example) the
2486 "Breakpoint n," part of the output. The return value of this
2489 PRINT_UNKNOWN: Means we printed nothing
2490 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2491 code to print the location. An example is
2492 "Breakpoint 1, " which should be followed by
2494 PRINT_SRC_ONLY: Means we printed something, but there is no need
2495 to also print the location part of the message.
2496 An example is the catch/throw messages, which
2497 don't require a location appended to the end.
2498 PRINT_NOTHING: We have done some printing and we don't need any
2499 further info to be printed.*/
2501 enum print_stop_action
2502 bpstat_print (bpstat bs
)
2506 /* Maybe another breakpoint in the chain caused us to stop.
2507 (Currently all watchpoints go on the bpstat whether hit or not.
2508 That probably could (should) be changed, provided care is taken
2509 with respect to bpstat_explains_signal). */
2510 for (; bs
; bs
= bs
->next
)
2512 val
= print_bp_stop_message (bs
);
2513 if (val
== PRINT_SRC_ONLY
2514 || val
== PRINT_SRC_AND_LOC
2515 || val
== PRINT_NOTHING
)
2519 /* We reached the end of the chain, or we got a null BS to start
2520 with and nothing was printed. */
2521 return PRINT_UNKNOWN
;
2524 /* Evaluate the expression EXP and return 1 if value is zero.
2525 This is used inside a catch_errors to evaluate the breakpoint condition.
2526 The argument is a "struct expression *" that has been cast to char * to
2527 make it pass through catch_errors. */
2530 breakpoint_cond_eval (void *exp
)
2532 struct value
*mark
= value_mark ();
2533 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2534 value_free_to_mark (mark
);
2538 /* Allocate a new bpstat and chain it to the current one. */
2541 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2545 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2547 bs
->breakpoint_at
= bl
;
2548 /* If the condition is false, etc., don't do the commands. */
2549 bs
->commands
= NULL
;
2551 bs
->print_it
= print_it_normal
;
2555 /* The target has stopped with waitstatus WS. Check if any hardware
2556 watchpoints have triggered, according to the target. */
2559 watchpoints_triggered (struct target_waitstatus
*ws
)
2561 int stopped_by_watchpoint
= STOPPED_BY_WATCHPOINT (*ws
);
2563 struct breakpoint
*b
;
2565 if (!stopped_by_watchpoint
)
2567 /* We were not stopped by a watchpoint. Mark all watchpoints
2568 as not triggered. */
2570 if (b
->type
== bp_hardware_watchpoint
2571 || b
->type
== bp_read_watchpoint
2572 || b
->type
== bp_access_watchpoint
)
2573 b
->watchpoint_triggered
= watch_triggered_no
;
2578 if (!target_stopped_data_address (¤t_target
, &addr
))
2580 /* We were stopped by a watchpoint, but we don't know where.
2581 Mark all watchpoints as unknown. */
2583 if (b
->type
== bp_hardware_watchpoint
2584 || b
->type
== bp_read_watchpoint
2585 || b
->type
== bp_access_watchpoint
)
2586 b
->watchpoint_triggered
= watch_triggered_unknown
;
2588 return stopped_by_watchpoint
;
2591 /* The target could report the data address. Mark watchpoints
2592 affected by this data address as triggered, and all others as not
2596 if (b
->type
== bp_hardware_watchpoint
2597 || b
->type
== bp_read_watchpoint
2598 || b
->type
== bp_access_watchpoint
)
2600 struct bp_location
*loc
;
2603 b
->watchpoint_triggered
= watch_triggered_no
;
2604 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2605 /* Exact match not required. Within range is
2607 if (target_watchpoint_addr_within_range (¤t_target
,
2611 b
->watchpoint_triggered
= watch_triggered_yes
;
2619 /* Possible return values for watchpoint_check (this can't be an enum
2620 because of check_errors). */
2621 /* The watchpoint has been deleted. */
2622 #define WP_DELETED 1
2623 /* The value has changed. */
2624 #define WP_VALUE_CHANGED 2
2625 /* The value has not changed. */
2626 #define WP_VALUE_NOT_CHANGED 3
2628 #define BP_TEMPFLAG 1
2629 #define BP_HARDWAREFLAG 2
2631 /* Check watchpoint condition. */
2634 watchpoint_check (void *p
)
2636 bpstat bs
= (bpstat
) p
;
2637 struct breakpoint
*b
;
2638 struct frame_info
*fr
;
2639 int within_current_scope
;
2641 b
= bs
->breakpoint_at
->owner
;
2643 if (b
->exp_valid_block
== NULL
)
2644 within_current_scope
= 1;
2647 /* There is no current frame at this moment. If we're going to have
2648 any chance of handling watchpoints on local variables, we'll need
2649 the frame chain (so we can determine if we're in scope). */
2650 reinit_frame_cache ();
2651 fr
= frame_find_by_id (b
->watchpoint_frame
);
2652 within_current_scope
= (fr
!= NULL
);
2654 /* If we've gotten confused in the unwinder, we might have
2655 returned a frame that can't describe this variable. */
2656 if (within_current_scope
2657 && block_function (b
->exp_valid_block
) != get_frame_function (fr
))
2658 within_current_scope
= 0;
2660 /* in_function_epilogue_p() returns a non-zero value if we're still
2661 in the function but the stack frame has already been invalidated.
2662 Since we can't rely on the values of local variables after the
2663 stack has been destroyed, we are treating the watchpoint in that
2664 state as `not changed' without further checking.
2666 vinschen/2003-09-04: The former implementation left out the case
2667 that the watchpoint frame couldn't be found by frame_find_by_id()
2668 because the current PC is currently in an epilogue. Calling
2669 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2670 if ((!within_current_scope
|| fr
== get_current_frame ())
2671 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2672 return WP_VALUE_NOT_CHANGED
;
2673 if (fr
&& within_current_scope
)
2674 /* If we end up stopping, the current frame will get selected
2675 in normal_stop. So this call to select_frame won't affect
2680 if (within_current_scope
)
2682 /* We use value_{,free_to_}mark because it could be a
2683 *long* time before we return to the command level and
2684 call free_all_values. We can't call free_all_values because
2685 we might be in the middle of evaluating a function call. */
2687 struct value
*mark
= value_mark ();
2688 struct value
*new_val
;
2690 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2691 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2692 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2694 if (new_val
!= NULL
)
2696 release_value (new_val
);
2697 value_free_to_mark (mark
);
2699 bs
->old_val
= b
->val
;
2702 /* We will stop here */
2703 return WP_VALUE_CHANGED
;
2707 /* Nothing changed, don't do anything. */
2708 value_free_to_mark (mark
);
2709 /* We won't stop here */
2710 return WP_VALUE_NOT_CHANGED
;
2715 /* This seems like the only logical thing to do because
2716 if we temporarily ignored the watchpoint, then when
2717 we reenter the block in which it is valid it contains
2718 garbage (in the case of a function, it may have two
2719 garbage values, one before and one after the prologue).
2720 So we can't even detect the first assignment to it and
2721 watch after that (since the garbage may or may not equal
2722 the first value assigned). */
2723 /* We print all the stop information in print_it_typical(), but
2724 in this case, by the time we call print_it_typical() this bp
2725 will be deleted already. So we have no choice but print the
2726 information here. */
2727 if (ui_out_is_mi_like_p (uiout
))
2729 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2730 ui_out_text (uiout
, "\nWatchpoint ");
2731 ui_out_field_int (uiout
, "wpnum", b
->number
);
2732 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2733 which its expression is valid.\n");
2735 if (b
->related_breakpoint
)
2736 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2737 b
->disposition
= disp_del_at_next_stop
;
2743 /* Return true if it looks like target has stopped due to hitting
2744 breakpoint location BL. This function does not check if we
2745 should stop, only if BL explains the stop. */
2747 bpstat_check_location (const struct bp_location
*bl
, CORE_ADDR bp_addr
)
2749 struct breakpoint
*b
= bl
->owner
;
2751 if (b
->type
!= bp_watchpoint
2752 && b
->type
!= bp_hardware_watchpoint
2753 && b
->type
!= bp_read_watchpoint
2754 && b
->type
!= bp_access_watchpoint
2755 && b
->type
!= bp_hardware_breakpoint
2756 && b
->type
!= bp_catch_fork
2757 && b
->type
!= bp_catch_vfork
2758 && b
->type
!= bp_catch_exec
) /* a non-watchpoint bp */
2760 if (bl
->address
!= bp_addr
) /* address doesn't match */
2762 if (overlay_debugging
/* unmapped overlay section */
2763 && section_is_overlay (bl
->section
)
2764 && !section_is_mapped (bl
->section
))
2768 /* Continuable hardware watchpoints are treated as non-existent if the
2769 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2770 some data address). Otherwise gdb won't stop on a break instruction
2771 in the code (not from a breakpoint) when a hardware watchpoint has
2772 been defined. Also skip watchpoints which we know did not trigger
2773 (did not match the data address). */
2775 if ((b
->type
== bp_hardware_watchpoint
2776 || b
->type
== bp_read_watchpoint
2777 || b
->type
== bp_access_watchpoint
)
2778 && b
->watchpoint_triggered
== watch_triggered_no
)
2781 if (b
->type
== bp_hardware_breakpoint
)
2783 if (bl
->address
!= bp_addr
)
2785 if (overlay_debugging
/* unmapped overlay section */
2786 && section_is_overlay (bl
->section
)
2787 && !section_is_mapped (bl
->section
))
2791 /* Is this a catchpoint of a load or unload? If so, did we
2792 get a load or unload of the specified library? If not,
2794 if ((b
->type
== bp_catch_load
)
2795 #if defined(SOLIB_HAVE_LOAD_EVENT)
2796 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2797 || ((b
->dll_pathname
!= NULL
)
2798 && (strcmp (b
->dll_pathname
,
2799 SOLIB_LOADED_LIBRARY_PATHNAME (
2800 PIDGET (inferior_ptid
)))
2806 if ((b
->type
== bp_catch_unload
)
2807 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2808 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2809 || ((b
->dll_pathname
!= NULL
)
2810 && (strcmp (b
->dll_pathname
,
2811 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2812 PIDGET (inferior_ptid
)))
2818 if ((b
->type
== bp_catch_fork
)
2819 && !inferior_has_forked (PIDGET (inferior_ptid
),
2820 &b
->forked_inferior_pid
))
2823 if ((b
->type
== bp_catch_vfork
)
2824 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2825 &b
->forked_inferior_pid
))
2828 if ((b
->type
== bp_catch_exec
)
2829 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2835 /* If BS refers to a watchpoint, determine if the watched values
2836 has actually changed, and we should stop. If not, set BS->stop
2839 bpstat_check_watchpoint (bpstat bs
)
2841 const struct bp_location
*bl
= bs
->breakpoint_at
;
2842 struct breakpoint
*b
= bl
->owner
;
2844 if (b
->type
== bp_watchpoint
2845 || b
->type
== bp_read_watchpoint
2846 || b
->type
== bp_access_watchpoint
2847 || b
->type
== bp_hardware_watchpoint
)
2851 int must_check_value
= 0;
2853 if (b
->type
== bp_watchpoint
)
2854 /* For a software watchpoint, we must always check the
2856 must_check_value
= 1;
2857 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2858 /* We have a hardware watchpoint (read, write, or access)
2859 and the target earlier reported an address watched by
2861 must_check_value
= 1;
2862 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2863 && b
->type
== bp_hardware_watchpoint
)
2864 /* We were stopped by a hardware watchpoint, but the target could
2865 not report the data address. We must check the watchpoint's
2866 value. Access and read watchpoints are out of luck; without
2867 a data address, we can't figure it out. */
2868 must_check_value
= 1;
2870 if (must_check_value
)
2872 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2874 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2875 int e
= catch_errors (watchpoint_check
, bs
, message
,
2877 do_cleanups (cleanups
);
2881 /* We've already printed what needs to be printed. */
2882 bs
->print_it
= print_it_done
;
2885 case WP_VALUE_CHANGED
:
2886 if (b
->type
== bp_read_watchpoint
)
2888 /* Don't stop: read watchpoints shouldn't fire if
2889 the value has changed. This is for targets
2890 which cannot set read-only watchpoints. */
2891 bs
->print_it
= print_it_noop
;
2895 case WP_VALUE_NOT_CHANGED
:
2896 if (b
->type
== bp_hardware_watchpoint
2897 || b
->type
== bp_watchpoint
)
2899 /* Don't stop: write watchpoints shouldn't fire if
2900 the value hasn't changed. */
2901 bs
->print_it
= print_it_noop
;
2909 /* Error from catch_errors. */
2910 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2911 if (b
->related_breakpoint
)
2912 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2913 b
->disposition
= disp_del_at_next_stop
;
2914 /* We've already printed what needs to be printed. */
2915 bs
->print_it
= print_it_done
;
2919 else /* must_check_value == 0 */
2921 /* This is a case where some watchpoint(s) triggered, but
2922 not at the address of this watchpoint, or else no
2923 watchpoint triggered after all. So don't print
2924 anything for this watchpoint. */
2925 bs
->print_it
= print_it_noop
;
2932 /* Check conditions (condition proper, frame, thread and ignore count)
2933 of breakpoint referred to by BS. If we should not stop for this
2934 breakpoint, set BS->stop to 0. */
2936 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
2938 int thread_id
= pid_to_thread_id (ptid
);
2939 const struct bp_location
*bl
= bs
->breakpoint_at
;
2940 struct breakpoint
*b
= bl
->owner
;
2942 if (frame_id_p (b
->frame_id
)
2943 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2947 int value_is_zero
= 0;
2949 /* If this is a scope breakpoint, mark the associated
2950 watchpoint as triggered so that we will handle the
2951 out-of-scope event. We'll get to the watchpoint next
2953 if (b
->type
== bp_watchpoint_scope
)
2954 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
2956 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
2958 /* Need to select the frame, with all that implies
2959 so that the conditions will have the right context. */
2960 select_frame (get_current_frame ());
2962 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
2963 "Error in testing breakpoint condition:\n",
2965 /* FIXME-someday, should give breakpoint # */
2968 if (bl
->cond
&& value_is_zero
)
2972 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2976 else if (b
->ignore_count
> 0)
2979 annotate_ignore_count_change ();
2981 /* Increase the hit count even though we don't
2989 /* Get a bpstat associated with having just stopped at address
2990 BP_ADDR in thread PTID.
2992 Determine whether we stopped at a breakpoint, etc, or whether we
2993 don't understand this stop. Result is a chain of bpstat's such that:
2995 if we don't understand the stop, the result is a null pointer.
2997 if we understand why we stopped, the result is not null.
2999 Each element of the chain refers to a particular breakpoint or
3000 watchpoint at which we have stopped. (We may have stopped for
3001 several reasons concurrently.)
3003 Each element of the chain has valid next, breakpoint_at,
3004 commands, FIXME??? fields. */
3007 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
3009 struct breakpoint
*b
= NULL
;
3010 const struct bp_location
*bl
;
3011 struct bp_location
*loc
;
3012 /* Root of the chain of bpstat's */
3013 struct bpstats root_bs
[1];
3014 /* Pointer to the last thing in the chain currently. */
3015 bpstat bs
= root_bs
;
3018 ALL_BP_LOCATIONS (bl
)
3022 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
3025 /* For hardware watchpoints, we look only at the first location.
3026 The watchpoint_check function will work on entire expression,
3027 not the individual locations. For read watchopints, the
3028 watchpoints_triggered function have checked all locations
3031 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
3034 if (!bpstat_check_location (bl
, bp_addr
))
3037 /* Come here if it's a watchpoint, or if the break address matches */
3039 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
3041 /* Assume we stop. Should we find watchpoint that is not actually
3042 triggered, or if condition of breakpoint is false, we'll reset
3047 bpstat_check_watchpoint (bs
);
3051 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
3052 /* We do not stop for these. */
3055 bpstat_check_breakpoint_conditions (bs
, ptid
);
3061 /* We will stop here */
3062 if (b
->disposition
== disp_disable
)
3064 b
->enable_state
= bp_disabled
;
3065 update_global_location_list ();
3069 bs
->commands
= b
->commands
;
3071 (strcmp ("silent", bs
->commands
->line
) == 0
3072 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3074 bs
->commands
= bs
->commands
->next
;
3077 bs
->commands
= copy_command_lines (bs
->commands
);
3080 /* Print nothing for this entry if we dont stop or if we dont print. */
3081 if (bs
->stop
== 0 || bs
->print
== 0)
3082 bs
->print_it
= print_it_noop
;
3085 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
3087 if (loc
->address
== bp_addr
)
3089 bs
= bpstat_alloc (loc
, bs
);
3090 /* For hits of moribund locations, we should just proceed. */
3093 bs
->print_it
= print_it_noop
;
3097 bs
->next
= NULL
; /* Terminate the chain */
3098 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3100 /* If we aren't stopping, the value of some hardware watchpoint may
3101 not have changed, but the intermediate memory locations we are
3102 watching may have. Don't bother if we're stopping; this will get
3104 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3109 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3111 && bs
->breakpoint_at
->owner
3112 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3113 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3114 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3116 /* remove/insert can invalidate bs->breakpoint_at, if this
3117 location is no longer used by the watchpoint. Prevent
3118 further code from trying to use it. */
3119 bs
->breakpoint_at
= NULL
;
3120 remove_breakpoints ();
3121 insert_breakpoints ();
3125 return root_bs
->next
;
3128 /* Tell what to do about this bpstat. */
3130 bpstat_what (bpstat bs
)
3132 /* Classify each bpstat as one of the following. */
3135 /* This bpstat element has no effect on the main_action. */
3138 /* There was a watchpoint, stop but don't print. */
3141 /* There was a watchpoint, stop and print. */
3144 /* There was a breakpoint but we're not stopping. */
3147 /* There was a breakpoint, stop but don't print. */
3150 /* There was a breakpoint, stop and print. */
3153 /* We hit the longjmp breakpoint. */
3156 /* We hit the longjmp_resume breakpoint. */
3159 /* We hit the step_resume breakpoint. */
3162 /* We hit the shared library event breakpoint. */
3165 /* We caught a shared library event. */
3168 /* This is just used to count how many enums there are. */
3172 /* Here is the table which drives this routine. So that we can
3173 format it pretty, we define some abbreviations for the
3174 enum bpstat_what codes. */
3175 #define kc BPSTAT_WHAT_KEEP_CHECKING
3176 #define ss BPSTAT_WHAT_STOP_SILENT
3177 #define sn BPSTAT_WHAT_STOP_NOISY
3178 #define sgl BPSTAT_WHAT_SINGLE
3179 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3180 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3181 #define sr BPSTAT_WHAT_STEP_RESUME
3182 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3183 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
3185 /* "Can't happen." Might want to print an error message.
3186 abort() is not out of the question, but chances are GDB is just
3187 a bit confused, not unusable. */
3188 #define err BPSTAT_WHAT_STOP_NOISY
3190 /* Given an old action and a class, come up with a new action. */
3191 /* One interesting property of this table is that wp_silent is the same
3192 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3193 after stopping, the check for whether to step over a breakpoint
3194 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3195 reference to how we stopped. We retain separate wp_silent and
3196 bp_silent codes in case we want to change that someday.
3198 Another possibly interesting property of this table is that
3199 there's a partial ordering, priority-like, of the actions. Once
3200 you've decided that some action is appropriate, you'll never go
3201 back and decide something of a lower priority is better. The
3204 kc < clr sgl shl shlr slr sn sr ss
3205 sgl < shl shlr slr sn sr ss
3206 slr < err shl shlr sn sr ss
3207 clr < err shl shlr sn sr ss
3214 What I think this means is that we don't need a damned table
3215 here. If you just put the rows and columns in the right order,
3216 it'd look awfully regular. We could simply walk the bpstat list
3217 and choose the highest priority action we find, with a little
3218 logic to handle the 'err' cases. */
3220 /* step_resume entries: a step resume breakpoint overrides another
3221 breakpoint of signal handling (see comment in wait_for_inferior
3222 at where we set the step_resume breakpoint). */
3224 static const enum bpstat_what_main_action
3225 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3228 /* kc ss sn sgl slr clr sr shl shlr
3231 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
, shlr
},
3233 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
, shlr
},
3235 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3237 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
, shlr
},
3239 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
, shlr
},
3241 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3243 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
, shlr
},
3245 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
, shlr
},
3247 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3249 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
, shlr
},
3251 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, sr
, shlr
, shlr
}
3265 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3266 struct bpstat_what retval
;
3268 retval
.call_dummy
= 0;
3269 for (; bs
!= NULL
; bs
= bs
->next
)
3271 enum class bs_class
= no_effect
;
3272 if (bs
->breakpoint_at
== NULL
)
3273 /* I suspect this can happen if it was a momentary breakpoint
3274 which has since been deleted. */
3276 if (bs
->breakpoint_at
->owner
== NULL
)
3277 bs_class
= bp_nostop
;
3279 switch (bs
->breakpoint_at
->owner
->type
)
3285 case bp_hardware_breakpoint
:
3291 bs_class
= bp_noisy
;
3293 bs_class
= bp_silent
;
3296 bs_class
= bp_nostop
;
3299 case bp_hardware_watchpoint
:
3300 case bp_read_watchpoint
:
3301 case bp_access_watchpoint
:
3305 bs_class
= wp_noisy
;
3307 bs_class
= wp_silent
;
3310 /* There was a watchpoint, but we're not stopping.
3311 This requires no further action. */
3312 bs_class
= no_effect
;
3315 bs_class
= long_jump
;
3317 case bp_longjmp_resume
:
3318 bs_class
= long_resume
;
3320 case bp_step_resume
:
3323 bs_class
= step_resume
;
3326 /* It is for the wrong frame. */
3327 bs_class
= bp_nostop
;
3329 case bp_watchpoint_scope
:
3330 bs_class
= bp_nostop
;
3332 case bp_shlib_event
:
3333 bs_class
= shlib_event
;
3335 case bp_thread_event
:
3336 case bp_overlay_event
:
3337 bs_class
= bp_nostop
;
3340 case bp_catch_unload
:
3341 /* Only if this catchpoint triggered should we cause the
3342 step-out-of-dld behaviour. Otherwise, we ignore this
3345 bs_class
= catch_shlib_event
;
3347 bs_class
= no_effect
;
3350 case bp_catch_vfork
:
3355 bs_class
= bp_noisy
;
3357 bs_class
= bp_silent
;
3360 /* There was a catchpoint, but we're not stopping.
3361 This requires no further action. */
3362 bs_class
= no_effect
;
3365 /* Make sure the action is stop (silent or noisy),
3366 so infrun.c pops the dummy frame. */
3367 bs_class
= bp_silent
;
3368 retval
.call_dummy
= 1;
3371 current_action
= table
[(int) bs_class
][(int) current_action
];
3373 retval
.main_action
= current_action
;
3377 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3378 without hardware support). This isn't related to a specific bpstat,
3379 just to things like whether watchpoints are set. */
3382 bpstat_should_step (void)
3384 struct breakpoint
*b
;
3386 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3393 /* Given a bpstat that records zero or more triggered eventpoints, this
3394 function returns another bpstat which contains only the catchpoints
3395 on that first list, if any. */
3397 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3399 struct bpstats root_bs
[1];
3400 bpstat bs
= root_bs
;
3401 struct breakpoint
*ep
;
3404 bpstat_clear (cp_list
);
3405 root_bs
->next
= NULL
;
3407 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3409 /* Is this eventpoint a catchpoint? If not, ignore it. */
3410 ep
= ep_list
->breakpoint_at
->owner
;
3413 if ((ep
->type
!= bp_catch_load
) &&
3414 (ep
->type
!= bp_catch_unload
))
3415 /* pai: (temp) ADD fork/vfork here!! */
3418 /* Yes; add it to the list. */
3419 bs
= bpstat_alloc (ep_list
->breakpoint_at
, bs
);
3424 #if defined(SOLIB_ADD)
3425 /* Also, for each triggered catchpoint, tag it with the name of
3426 the library that caused this trigger. (We copy the name now,
3427 because it's only guaranteed to be available NOW, when the
3428 catchpoint triggers. Clients who may wish to know the name
3429 later must get it from the catchpoint itself.) */
3430 if (ep
->triggered_dll_pathname
!= NULL
)
3431 xfree (ep
->triggered_dll_pathname
);
3432 if (ep
->type
== bp_catch_load
)
3433 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3434 PIDGET (inferior_ptid
));
3436 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3437 PIDGET (inferior_ptid
));
3439 dll_pathname
= NULL
;
3443 ep
->triggered_dll_pathname
= (char *)
3444 xmalloc (strlen (dll_pathname
) + 1);
3445 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3448 ep
->triggered_dll_pathname
= NULL
;
3454 static void print_breakpoint_location (struct breakpoint
*b
,
3455 struct bp_location
*loc
,
3457 struct ui_stream
*stb
)
3462 = find_pc_sect_function (loc
->address
, loc
->section
);
3465 ui_out_text (uiout
, "in ");
3466 ui_out_field_string (uiout
, "func",
3467 SYMBOL_PRINT_NAME (sym
));
3468 ui_out_wrap_hint (uiout
, wrap_indent
);
3469 ui_out_text (uiout
, " at ");
3471 ui_out_field_string (uiout
, "file", b
->source_file
);
3472 ui_out_text (uiout
, ":");
3474 if (ui_out_is_mi_like_p (uiout
))
3476 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3477 char *fullname
= symtab_to_fullname (sal
.symtab
);
3480 ui_out_field_string (uiout
, "fullname", fullname
);
3483 ui_out_field_int (uiout
, "line", b
->line_number
);
3487 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3491 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3492 ui_out_field_stream (uiout
, "at", stb
);
3496 /* Print B to gdb_stdout. */
3498 print_one_breakpoint_location (struct breakpoint
*b
,
3499 struct bp_location
*loc
,
3501 CORE_ADDR
*last_addr
)
3503 struct command_line
*l
;
3505 struct ep_type_description
3510 static struct ep_type_description bptypes
[] =
3512 {bp_none
, "?deleted?"},
3513 {bp_breakpoint
, "breakpoint"},
3514 {bp_hardware_breakpoint
, "hw breakpoint"},
3515 {bp_until
, "until"},
3516 {bp_finish
, "finish"},
3517 {bp_watchpoint
, "watchpoint"},
3518 {bp_hardware_watchpoint
, "hw watchpoint"},
3519 {bp_read_watchpoint
, "read watchpoint"},
3520 {bp_access_watchpoint
, "acc watchpoint"},
3521 {bp_longjmp
, "longjmp"},
3522 {bp_longjmp_resume
, "longjmp resume"},
3523 {bp_step_resume
, "step resume"},
3524 {bp_watchpoint_scope
, "watchpoint scope"},
3525 {bp_call_dummy
, "call dummy"},
3526 {bp_shlib_event
, "shlib events"},
3527 {bp_thread_event
, "thread events"},
3528 {bp_overlay_event
, "overlay events"},
3529 {bp_catch_load
, "catch load"},
3530 {bp_catch_unload
, "catch unload"},
3531 {bp_catch_fork
, "catch fork"},
3532 {bp_catch_vfork
, "catch vfork"},
3533 {bp_catch_exec
, "catch exec"}
3536 static char bpenables
[] = "nynny";
3537 char wrap_indent
[80];
3538 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3539 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3540 struct cleanup
*bkpt_chain
;
3542 int header_of_multiple
= 0;
3543 int part_of_multiple
= (loc
!= NULL
);
3545 gdb_assert (!loc
|| loc_number
!= 0);
3546 /* See comment in print_one_breakpoint concerning
3547 treatment of breakpoints with single disabled
3551 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3552 header_of_multiple
= 1;
3557 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3561 if (part_of_multiple
)
3564 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3565 ui_out_field_string (uiout
, "number", formatted
);
3570 ui_out_field_int (uiout
, "number", b
->number
);
3575 if (part_of_multiple
)
3576 ui_out_field_skip (uiout
, "type");
3579 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3580 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3581 internal_error (__FILE__
, __LINE__
,
3582 _("bptypes table does not describe type #%d."),
3584 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3589 if (part_of_multiple
)
3590 ui_out_field_skip (uiout
, "disp");
3592 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3597 if (part_of_multiple
)
3598 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3600 ui_out_field_fmt (uiout
, "enabled", "%c",
3601 bpenables
[(int) b
->enable_state
]);
3602 ui_out_spaces (uiout
, 2);
3606 strcpy (wrap_indent
, " ");
3609 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3610 strcat (wrap_indent
, " ");
3612 strcat (wrap_indent
, " ");
3615 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3617 /* Although the print_one can possibly print
3618 all locations, calling it here is not likely
3619 to get any nice result. So, make sure there's
3620 just one location. */
3621 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3622 b
->ops
->print_one (b
, last_addr
);
3628 internal_error (__FILE__
, __LINE__
,
3629 _("print_one_breakpoint: bp_none encountered\n"));
3633 case bp_hardware_watchpoint
:
3634 case bp_read_watchpoint
:
3635 case bp_access_watchpoint
:
3636 /* Field 4, the address, is omitted (which makes the columns
3637 not line up too nicely with the headers, but the effect
3638 is relatively readable). */
3640 ui_out_field_skip (uiout
, "addr");
3642 print_expression (b
->exp
, stb
->stream
);
3643 ui_out_field_stream (uiout
, "what", stb
);
3647 case bp_catch_unload
:
3648 /* Field 4, the address, is omitted (which makes the columns
3649 not line up too nicely with the headers, but the effect
3650 is relatively readable). */
3652 ui_out_field_skip (uiout
, "addr");
3654 if (b
->dll_pathname
== NULL
)
3656 ui_out_field_string (uiout
, "what", "<any library>");
3657 ui_out_spaces (uiout
, 1);
3661 ui_out_text (uiout
, "library \"");
3662 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3663 ui_out_text (uiout
, "\" ");
3668 case bp_catch_vfork
:
3669 /* Field 4, the address, is omitted (which makes the columns
3670 not line up too nicely with the headers, but the effect
3671 is relatively readable). */
3673 ui_out_field_skip (uiout
, "addr");
3675 if (b
->forked_inferior_pid
!= 0)
3677 ui_out_text (uiout
, "process ");
3678 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3679 ui_out_spaces (uiout
, 1);
3684 /* Field 4, the address, is omitted (which makes the columns
3685 not line up too nicely with the headers, but the effect
3686 is relatively readable). */
3688 ui_out_field_skip (uiout
, "addr");
3690 if (b
->exec_pathname
!= NULL
)
3692 ui_out_text (uiout
, "program \"");
3693 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3694 ui_out_text (uiout
, "\" ");
3699 case bp_hardware_breakpoint
:
3703 case bp_longjmp_resume
:
3704 case bp_step_resume
:
3705 case bp_watchpoint_scope
:
3707 case bp_shlib_event
:
3708 case bp_thread_event
:
3709 case bp_overlay_event
:
3713 if (header_of_multiple
)
3714 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3715 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3716 ui_out_field_string (uiout
, "addr", "<PENDING>");
3718 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3721 if (!header_of_multiple
)
3722 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3724 *last_addr
= b
->loc
->address
;
3728 if (!part_of_multiple
&& b
->thread
!= -1)
3730 /* FIXME: This seems to be redundant and lost here; see the
3731 "stop only in" line a little further down. */
3732 ui_out_text (uiout
, " thread ");
3733 ui_out_field_int (uiout
, "thread", b
->thread
);
3736 ui_out_text (uiout
, "\n");
3738 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3741 ui_out_text (uiout
, "\tstop only in stack frame at ");
3742 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3744 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3745 ui_out_text (uiout
, "\n");
3748 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3750 /* We do not print the condition for Ada exception catchpoints
3751 because the condition is an internal implementation detail
3752 that we do not want to expose to the user. */
3754 ui_out_text (uiout
, "\tstop only if ");
3755 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3756 ui_out_text (uiout
, "\n");
3759 if (!part_of_multiple
&& b
->thread
!= -1)
3761 /* FIXME should make an annotation for this */
3762 ui_out_text (uiout
, "\tstop only in thread ");
3763 ui_out_field_int (uiout
, "thread", b
->thread
);
3764 ui_out_text (uiout
, "\n");
3767 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
)
3769 /* FIXME should make an annotation for this */
3770 if (ep_is_catchpoint (b
))
3771 ui_out_text (uiout
, "\tcatchpoint");
3773 ui_out_text (uiout
, "\tbreakpoint");
3774 ui_out_text (uiout
, " already hit ");
3775 ui_out_field_int (uiout
, "times", b
->hit_count
);
3776 if (b
->hit_count
== 1)
3777 ui_out_text (uiout
, " time\n");
3779 ui_out_text (uiout
, " times\n");
3782 /* Output the count also if it is zero, but only if this is
3783 mi. FIXME: Should have a better test for this. */
3784 if (ui_out_is_mi_like_p (uiout
))
3785 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3786 ui_out_field_int (uiout
, "times", b
->hit_count
);
3788 if (!part_of_multiple
&& b
->ignore_count
)
3791 ui_out_text (uiout
, "\tignore next ");
3792 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3793 ui_out_text (uiout
, " hits\n");
3796 if (!part_of_multiple
&& (l
= b
->commands
))
3798 struct cleanup
*script_chain
;
3801 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3802 print_command_lines (uiout
, l
, 4);
3803 do_cleanups (script_chain
);
3806 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3809 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3810 else if (b
->exp_string
)
3811 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3814 do_cleanups (bkpt_chain
);
3815 do_cleanups (old_chain
);
3819 print_one_breakpoint (struct breakpoint
*b
,
3820 CORE_ADDR
*last_addr
)
3822 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3824 /* If this breakpoint has custom print function,
3825 it's already printed. Otherwise, print individual
3826 locations, if any. */
3827 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3829 /* If breakpoint has a single location that is
3830 disabled, we print it as if it had
3831 several locations, since otherwise it's hard to
3832 represent "breakpoint enabled, location disabled"
3834 Note that while hardware watchpoints have
3835 several locations internally, that's no a property
3838 && !is_hardware_watchpoint (b
)
3839 && (b
->loc
->next
|| !b
->loc
->enabled
)
3840 && !ui_out_is_mi_like_p (uiout
))
3842 struct bp_location
*loc
;
3844 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3845 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3851 struct captured_breakpoint_query_args
3857 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3859 struct captured_breakpoint_query_args
*args
= data
;
3860 struct breakpoint
*b
;
3861 CORE_ADDR dummy_addr
= 0;
3864 if (args
->bnum
== b
->number
)
3866 print_one_breakpoint (b
, &dummy_addr
);
3874 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3876 struct captured_breakpoint_query_args args
;
3878 /* For the moment we don't trust print_one_breakpoint() to not throw
3880 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3881 error_message
, RETURN_MASK_ALL
) < 0)
3887 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3888 catchpoints, et.al.). */
3891 user_settable_breakpoint (const struct breakpoint
*b
)
3893 return (b
->type
== bp_breakpoint
3894 || b
->type
== bp_catch_load
3895 || b
->type
== bp_catch_unload
3896 || b
->type
== bp_catch_fork
3897 || b
->type
== bp_catch_vfork
3898 || b
->type
== bp_catch_exec
3899 || b
->type
== bp_hardware_breakpoint
3900 || b
->type
== bp_watchpoint
3901 || b
->type
== bp_read_watchpoint
3902 || b
->type
== bp_access_watchpoint
3903 || b
->type
== bp_hardware_watchpoint
);
3906 /* Print information on user settable breakpoint (watchpoint, etc)
3907 number BNUM. If BNUM is -1 print all user settable breakpoints.
3908 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3911 breakpoint_1 (int bnum
, int allflag
)
3913 struct breakpoint
*b
;
3914 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3915 int nr_printable_breakpoints
;
3916 struct cleanup
*bkpttbl_chain
;
3918 /* Compute the number of rows in the table. */
3919 nr_printable_breakpoints
= 0;
3922 || bnum
== b
->number
)
3924 if (allflag
|| user_settable_breakpoint (b
))
3925 nr_printable_breakpoints
++;
3930 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3934 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3937 if (nr_printable_breakpoints
> 0)
3938 annotate_breakpoints_headers ();
3939 if (nr_printable_breakpoints
> 0)
3941 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3942 if (nr_printable_breakpoints
> 0)
3944 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3945 if (nr_printable_breakpoints
> 0)
3947 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3948 if (nr_printable_breakpoints
> 0)
3950 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3953 if (nr_printable_breakpoints
> 0)
3955 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3956 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3958 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3960 if (nr_printable_breakpoints
> 0)
3962 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3963 ui_out_table_body (uiout
);
3964 if (nr_printable_breakpoints
> 0)
3965 annotate_breakpoints_table ();
3969 || bnum
== b
->number
)
3971 /* We only print out user settable breakpoints unless the
3973 if (allflag
|| user_settable_breakpoint (b
))
3974 print_one_breakpoint (b
, &last_addr
);
3977 do_cleanups (bkpttbl_chain
);
3979 if (nr_printable_breakpoints
== 0)
3982 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3984 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3989 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3990 that a comparison of an unsigned with -1 is always false. */
3991 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3992 set_next_address (last_addr
);
3995 /* FIXME? Should this be moved up so that it is only called when
3996 there have been breakpoints? */
3997 annotate_breakpoints_table_end ();
4001 breakpoints_info (char *bnum_exp
, int from_tty
)
4006 bnum
= parse_and_eval_long (bnum_exp
);
4008 breakpoint_1 (bnum
, 0);
4012 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
4017 bnum
= parse_and_eval_long (bnum_exp
);
4019 breakpoint_1 (bnum
, 1);
4023 breakpoint_has_pc (struct breakpoint
*b
, CORE_ADDR pc
, asection
*section
)
4025 struct bp_location
*bl
= b
->loc
;
4026 for (; bl
; bl
= bl
->next
)
4028 if (bl
->address
== pc
4029 && (!overlay_debugging
|| bl
->section
== section
))
4035 /* Print a message describing any breakpoints set at PC. */
4038 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
, int thread
)
4041 struct breakpoint
*b
;
4044 others
+= breakpoint_has_pc (b
, pc
, section
);
4048 printf_filtered (_("Note: breakpoint "));
4049 else /* if (others == ???) */
4050 printf_filtered (_("Note: breakpoints "));
4052 if (breakpoint_has_pc (b
, pc
, section
))
4055 printf_filtered ("%d", b
->number
);
4056 if (b
->thread
== -1 && thread
!= -1)
4057 printf_filtered (" (all threads)");
4058 else if (b
->thread
!= -1)
4059 printf_filtered (" (thread %d)", b
->thread
);
4060 printf_filtered ("%s%s ",
4061 ((b
->enable_state
== bp_disabled
||
4062 b
->enable_state
== bp_call_disabled
)
4064 : b
->enable_state
== bp_permanent
4068 : ((others
== 1) ? " and" : ""));
4070 printf_filtered (_("also set at pc "));
4071 fputs_filtered (paddress (pc
), gdb_stdout
);
4072 printf_filtered (".\n");
4076 /* Set the default place to put a breakpoint
4077 for the `break' command with no arguments. */
4080 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
4083 default_breakpoint_valid
= valid
;
4084 default_breakpoint_address
= addr
;
4085 default_breakpoint_symtab
= symtab
;
4086 default_breakpoint_line
= line
;
4089 /* Return true iff it is meaningful to use the address member of
4090 BPT. For some breakpoint types, the address member is irrelevant
4091 and it makes no sense to attempt to compare it to other addresses
4092 (or use it for any other purpose either).
4094 More specifically, each of the following breakpoint types will always
4095 have a zero valued address and we don't want check_duplicates() to mark
4096 breakpoints of any of these types to be a duplicate of an actual
4097 breakpoint at address zero:
4100 bp_hardware_watchpoint
4102 bp_access_watchpoint
4108 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
4110 enum bptype type
= bpt
->type
;
4112 return (type
!= bp_watchpoint
4113 && type
!= bp_hardware_watchpoint
4114 && type
!= bp_read_watchpoint
4115 && type
!= bp_access_watchpoint
4116 && type
!= bp_catch_exec
4117 && type
!= bp_catch_fork
4118 && type
!= bp_catch_vfork
);
4121 /* Rescan breakpoints at the same address and section as BPT,
4122 marking the first one as "first" and any others as "duplicates".
4123 This is so that the bpt instruction is only inserted once.
4124 If we have a permanent breakpoint at the same place as BPT, make
4125 that one the official one, and the rest as duplicates. */
4128 check_duplicates_for (CORE_ADDR address
, asection
*section
)
4130 struct bp_location
*b
;
4132 struct bp_location
*perm_bp
= 0;
4134 ALL_BP_LOCATIONS (b
)
4135 if (b
->owner
->enable_state
!= bp_disabled
4136 && b
->owner
->enable_state
!= bp_call_disabled
4138 && !b
->shlib_disabled
4139 && b
->address
== address
/* address / overlay match */
4140 && (!overlay_debugging
|| b
->section
== section
)
4141 && breakpoint_address_is_meaningful (b
->owner
))
4143 /* Have we found a permanent breakpoint? */
4144 if (b
->owner
->enable_state
== bp_permanent
)
4151 b
->duplicate
= count
> 1;
4154 /* If we found a permanent breakpoint at this address, go over the
4155 list again and declare all the other breakpoints there to be the
4159 perm_bp
->duplicate
= 0;
4161 /* Permanent breakpoint should always be inserted. */
4162 if (! perm_bp
->inserted
)
4163 internal_error (__FILE__
, __LINE__
,
4164 _("allegedly permanent breakpoint is not "
4165 "actually inserted"));
4167 ALL_BP_LOCATIONS (b
)
4170 if (b
->owner
->enable_state
!= bp_disabled
4171 && b
->owner
->enable_state
!= bp_call_disabled
4172 && b
->enabled
&& !b
->shlib_disabled
4173 && b
->address
== address
/* address / overlay match */
4174 && (!overlay_debugging
|| b
->section
== section
)
4175 && breakpoint_address_is_meaningful (b
->owner
))
4178 internal_error (__FILE__
, __LINE__
,
4179 _("another breakpoint was inserted on top of "
4180 "a permanent breakpoint"));
4189 check_duplicates (struct breakpoint
*bpt
)
4191 struct bp_location
*bl
= bpt
->loc
;
4193 if (! breakpoint_address_is_meaningful (bpt
))
4196 for (; bl
; bl
= bl
->next
)
4197 check_duplicates_for (bl
->address
, bl
->section
);
4201 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4202 int bnum
, int have_bnum
)
4207 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4208 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4210 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4211 bnum
, astr1
, astr2
);
4213 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4216 /* Adjust a breakpoint's address to account for architectural constraints
4217 on breakpoint placement. Return the adjusted address. Note: Very
4218 few targets require this kind of adjustment. For most targets,
4219 this function is simply the identity function. */
4222 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4224 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4226 /* Very few targets need any kind of breakpoint adjustment. */
4229 else if (bptype
== bp_watchpoint
4230 || bptype
== bp_hardware_watchpoint
4231 || bptype
== bp_read_watchpoint
4232 || bptype
== bp_access_watchpoint
4233 || bptype
== bp_catch_fork
4234 || bptype
== bp_catch_vfork
4235 || bptype
== bp_catch_exec
)
4237 /* Watchpoints and the various bp_catch_* eventpoints should not
4238 have their addresses modified. */
4243 CORE_ADDR adjusted_bpaddr
;
4245 /* Some targets have architectural constraints on the placement
4246 of breakpoint instructions. Obtain the adjusted address. */
4247 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4250 /* An adjusted breakpoint address can significantly alter
4251 a user's expectations. Print a warning if an adjustment
4253 if (adjusted_bpaddr
!= bpaddr
)
4254 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4256 return adjusted_bpaddr
;
4260 /* Allocate a struct bp_location. */
4262 static struct bp_location
*
4263 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
4265 struct bp_location
*loc
, *loc_p
;
4267 loc
= xmalloc (sizeof (struct bp_location
));
4268 memset (loc
, 0, sizeof (*loc
));
4272 loc
->shlib_disabled
= 0;
4281 case bp_longjmp_resume
:
4282 case bp_step_resume
:
4283 case bp_watchpoint_scope
:
4285 case bp_shlib_event
:
4286 case bp_thread_event
:
4287 case bp_overlay_event
:
4289 case bp_catch_unload
:
4290 loc
->loc_type
= bp_loc_software_breakpoint
;
4292 case bp_hardware_breakpoint
:
4293 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4295 case bp_hardware_watchpoint
:
4296 case bp_read_watchpoint
:
4297 case bp_access_watchpoint
:
4298 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4302 case bp_catch_vfork
:
4304 loc
->loc_type
= bp_loc_other
;
4307 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4313 static void free_bp_location (struct bp_location
*loc
)
4318 if (loc
->function_name
)
4319 xfree (loc
->function_name
);
4324 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4325 that has type BPTYPE and has no locations as yet. */
4327 static struct breakpoint
*
4328 set_raw_breakpoint_without_location (enum bptype bptype
)
4330 struct breakpoint
*b
, *b1
;
4332 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4333 memset (b
, 0, sizeof (*b
));
4336 b
->language
= current_language
->la_language
;
4337 b
->input_radix
= input_radix
;
4339 b
->enable_state
= bp_enabled
;
4342 b
->ignore_count
= 0;
4344 b
->frame_id
= null_frame_id
;
4345 b
->dll_pathname
= NULL
;
4346 b
->triggered_dll_pathname
= NULL
;
4347 b
->forked_inferior_pid
= 0;
4348 b
->exec_pathname
= NULL
;
4350 b
->condition_not_parsed
= 0;
4352 /* Add this breakpoint to the end of the chain
4353 so that a list of breakpoints will come out in order
4354 of increasing numbers. */
4356 b1
= breakpoint_chain
;
4358 breakpoint_chain
= b
;
4368 /* Initialize loc->function_name. */
4370 set_breakpoint_location_function (struct bp_location
*loc
)
4372 if (loc
->owner
->type
== bp_breakpoint
4373 || loc
->owner
->type
== bp_hardware_breakpoint
)
4375 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4377 if (loc
->function_name
)
4378 loc
->function_name
= xstrdup (loc
->function_name
);
4382 /* set_raw_breakpoint is a low level routine for allocating and
4383 partially initializing a breakpoint of type BPTYPE. The newly
4384 created breakpoint's address, section, source file name, and line
4385 number are provided by SAL. The newly created and partially
4386 initialized breakpoint is added to the breakpoint chain and
4387 is also returned as the value of this function.
4389 It is expected that the caller will complete the initialization of
4390 the newly created breakpoint struct as well as output any status
4391 information regarding the creation of a new breakpoint. In
4392 particular, set_raw_breakpoint does NOT set the breakpoint
4393 number! Care should be taken to not allow an error to occur
4394 prior to completing the initialization of the breakpoint. If this
4395 should happen, a bogus breakpoint will be left on the chain. */
4398 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4400 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4401 CORE_ADDR adjusted_address
;
4403 /* Adjust the breakpoint's address prior to allocating a location.
4404 Once we call allocate_bp_location(), that mostly uninitialized
4405 location will be placed on the location chain. Adjustment of the
4406 breakpoint may cause target_read_memory() to be called and we do
4407 not want its scan of the location chain to find a breakpoint and
4408 location that's only been partially initialized. */
4409 adjusted_address
= adjust_breakpoint_address (sal
.pc
, bptype
);
4411 b
->loc
= allocate_bp_location (b
, bptype
);
4412 b
->loc
->requested_address
= sal
.pc
;
4413 b
->loc
->address
= adjusted_address
;
4415 if (sal
.symtab
== NULL
)
4416 b
->source_file
= NULL
;
4418 b
->source_file
= savestring (sal
.symtab
->filename
,
4419 strlen (sal
.symtab
->filename
));
4420 b
->loc
->section
= sal
.section
;
4421 b
->line_number
= sal
.line
;
4423 set_breakpoint_location_function (b
->loc
);
4425 breakpoints_changed ();
4431 /* Note that the breakpoint object B describes a permanent breakpoint
4432 instruction, hard-wired into the inferior's code. */
4434 make_breakpoint_permanent (struct breakpoint
*b
)
4436 struct bp_location
*bl
;
4437 b
->enable_state
= bp_permanent
;
4439 /* By definition, permanent breakpoints are already present in the code.
4440 Mark all locations as inserted. For now, make_breakpoint_permanent
4441 is called in just one place, so it's hard to say if it's reasonable
4442 to have permanent breakpoint with multiple locations or not,
4443 but it's easy to implmement. */
4444 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4448 static struct breakpoint
*
4449 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4451 static int internal_breakpoint_number
= -1;
4452 struct symtab_and_line sal
;
4453 struct breakpoint
*b
;
4455 init_sal (&sal
); /* initialize to zeroes */
4458 sal
.section
= find_pc_overlay (sal
.pc
);
4460 b
= set_raw_breakpoint (sal
, type
);
4461 b
->number
= internal_breakpoint_number
--;
4462 b
->disposition
= disp_donttouch
;
4469 create_longjmp_breakpoint (char *func_name
)
4471 struct breakpoint
*b
;
4472 struct minimal_symbol
*m
;
4474 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4476 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4477 update_global_location_list ();
4480 /* Call this routine when stepping and nexting to enable a breakpoint
4481 if we do a longjmp(). When we hit that breakpoint, call
4482 set_longjmp_resume_breakpoint() to figure out where we are going. */
4485 set_longjmp_breakpoint (void)
4487 struct breakpoint
*b
;
4489 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4491 create_longjmp_breakpoint ("longjmp");
4492 create_longjmp_breakpoint ("_longjmp");
4493 create_longjmp_breakpoint ("siglongjmp");
4494 create_longjmp_breakpoint ("_siglongjmp");
4498 /* Delete all longjmp breakpoints from THREAD. */
4500 delete_longjmp_breakpoint (int thread
)
4502 struct breakpoint
*b
, *temp
;
4504 ALL_BREAKPOINTS_SAFE (b
, temp
)
4505 if (b
->type
== bp_longjmp
)
4507 if (b
->thread
== thread
)
4508 delete_breakpoint (b
);
4513 create_overlay_event_breakpoint (char *func_name
)
4515 struct breakpoint
*b
;
4516 struct minimal_symbol
*m
;
4518 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4521 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4523 b
->addr_string
= xstrdup (func_name
);
4525 if (overlay_debugging
== ovly_auto
)
4527 b
->enable_state
= bp_enabled
;
4528 overlay_events_enabled
= 1;
4532 b
->enable_state
= bp_disabled
;
4533 overlay_events_enabled
= 0;
4535 update_global_location_list ();
4539 enable_overlay_breakpoints (void)
4541 struct breakpoint
*b
;
4544 if (b
->type
== bp_overlay_event
)
4546 b
->enable_state
= bp_enabled
;
4547 update_global_location_list ();
4548 overlay_events_enabled
= 1;
4553 disable_overlay_breakpoints (void)
4555 struct breakpoint
*b
;
4558 if (b
->type
== bp_overlay_event
)
4560 b
->enable_state
= bp_disabled
;
4561 update_global_location_list ();
4562 overlay_events_enabled
= 0;
4567 create_thread_event_breakpoint (CORE_ADDR address
)
4569 struct breakpoint
*b
;
4571 b
= create_internal_breakpoint (address
, bp_thread_event
);
4573 b
->enable_state
= bp_enabled
;
4574 /* addr_string has to be used or breakpoint_re_set will delete me. */
4575 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4577 update_global_location_list_nothrow ();
4583 remove_thread_event_breakpoints (void)
4585 struct breakpoint
*b
, *temp
;
4587 ALL_BREAKPOINTS_SAFE (b
, temp
)
4588 if (b
->type
== bp_thread_event
)
4589 delete_breakpoint (b
);
4592 struct captured_parse_breakpoint_args
4595 struct symtabs_and_lines
*sals_p
;
4596 char ***addr_string_p
;
4600 struct lang_and_radix
4608 remove_solib_event_breakpoints (void)
4610 struct breakpoint
*b
, *temp
;
4612 ALL_BREAKPOINTS_SAFE (b
, temp
)
4613 if (b
->type
== bp_shlib_event
)
4614 delete_breakpoint (b
);
4618 create_solib_event_breakpoint (CORE_ADDR address
)
4620 struct breakpoint
*b
;
4622 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4623 update_global_location_list_nothrow ();
4627 /* Disable any breakpoints that are on code in shared libraries. Only
4628 apply to enabled breakpoints, disabled ones can just stay disabled. */
4631 disable_breakpoints_in_shlibs (void)
4633 struct bp_location
*loc
;
4634 int disabled_shlib_breaks
= 0;
4636 ALL_BP_LOCATIONS (loc
)
4638 struct breakpoint
*b
= loc
->owner
;
4639 /* We apply the check to all breakpoints, including disabled
4640 for those with loc->duplicate set. This is so that when breakpoint
4641 becomes enabled, or the duplicate is removed, gdb will try to insert
4642 all breakpoints. If we don't set shlib_disabled here, we'll try
4643 to insert those breakpoints and fail. */
4644 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4645 && !loc
->shlib_disabled
4647 && PC_SOLIB (loc
->address
)
4649 && solib_address (loc
->address
)
4653 loc
->shlib_disabled
= 1;
4658 /* Disable any breakpoints that are in in an unloaded shared library. Only
4659 apply to enabled breakpoints, disabled ones can just stay disabled. */
4662 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4664 struct bp_location
*loc
;
4665 int disabled_shlib_breaks
= 0;
4667 ALL_BP_LOCATIONS (loc
)
4669 struct breakpoint
*b
= loc
->owner
;
4670 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4671 || loc
->loc_type
== bp_loc_software_breakpoint
)
4672 && !loc
->shlib_disabled
)
4675 char *so_name
= PC_SOLIB (loc
->address
);
4677 char *so_name
= solib_address (loc
->address
);
4679 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4681 loc
->shlib_disabled
= 1;
4682 /* At this point, we cannot rely on remove_breakpoint
4683 succeeding so we must mark the breakpoint as not inserted
4684 to prevent future errors occurring in remove_breakpoints. */
4686 if (!disabled_shlib_breaks
)
4688 target_terminal_ours_for_output ();
4689 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4692 disabled_shlib_breaks
= 1;
4699 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4700 enum bptype bp_kind
)
4702 struct symtab_and_line sal
;
4703 struct breakpoint
*b
;
4704 int thread
= -1; /* All threads. */
4711 b
= set_raw_breakpoint (sal
, bp_kind
);
4712 set_breakpoint_count (breakpoint_count
+ 1);
4713 b
->number
= breakpoint_count
;
4714 b
->cond_string
= (cond_string
== NULL
) ?
4715 NULL
: savestring (cond_string
, strlen (cond_string
));
4717 b
->addr_string
= NULL
;
4718 b
->enable_state
= bp_enabled
;
4719 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4720 b
->forked_inferior_pid
= 0;
4721 update_global_location_list ();
4728 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4730 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4734 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4736 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4740 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4742 struct symtab_and_line sal
;
4743 struct breakpoint
*b
;
4744 int thread
= -1; /* All threads. */
4751 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4752 set_breakpoint_count (breakpoint_count
+ 1);
4753 b
->number
= breakpoint_count
;
4754 b
->cond_string
= (cond_string
== NULL
) ?
4755 NULL
: savestring (cond_string
, strlen (cond_string
));
4757 b
->addr_string
= NULL
;
4758 b
->enable_state
= bp_enabled
;
4759 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4760 update_global_location_list ();
4766 hw_breakpoint_used_count (void)
4768 struct breakpoint
*b
;
4773 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4781 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4783 struct breakpoint
*b
;
4786 *other_type_used
= 0;
4789 if (breakpoint_enabled (b
))
4791 if (b
->type
== type
)
4793 else if ((b
->type
== bp_hardware_watchpoint
||
4794 b
->type
== bp_read_watchpoint
||
4795 b
->type
== bp_access_watchpoint
))
4796 *other_type_used
= 1;
4803 disable_watchpoints_before_interactive_call_start (void)
4805 struct breakpoint
*b
;
4809 if (((b
->type
== bp_watchpoint
)
4810 || (b
->type
== bp_hardware_watchpoint
)
4811 || (b
->type
== bp_read_watchpoint
)
4812 || (b
->type
== bp_access_watchpoint
))
4813 && breakpoint_enabled (b
))
4815 b
->enable_state
= bp_call_disabled
;
4816 update_global_location_list ();
4822 enable_watchpoints_after_interactive_call_stop (void)
4824 struct breakpoint
*b
;
4828 if (((b
->type
== bp_watchpoint
)
4829 || (b
->type
== bp_hardware_watchpoint
)
4830 || (b
->type
== bp_read_watchpoint
)
4831 || (b
->type
== bp_access_watchpoint
))
4832 && (b
->enable_state
== bp_call_disabled
))
4834 b
->enable_state
= bp_enabled
;
4835 update_global_location_list ();
4841 /* Set a breakpoint that will evaporate an end of command
4842 at address specified by SAL.
4843 Restrict it to frame FRAME if FRAME is nonzero. */
4846 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4849 struct breakpoint
*b
;
4850 b
= set_raw_breakpoint (sal
, type
);
4851 b
->enable_state
= bp_enabled
;
4852 b
->disposition
= disp_donttouch
;
4853 b
->frame_id
= frame_id
;
4855 /* If we're debugging a multi-threaded program, then we
4856 want momentary breakpoints to be active in only a
4857 single thread of control. */
4858 if (in_thread_list (inferior_ptid
))
4859 b
->thread
= pid_to_thread_id (inferior_ptid
);
4861 update_global_location_list_nothrow ();
4867 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
4869 struct symtab_and_line sal
;
4871 sal
= find_pc_line (pc
, 0);
4873 sal
.section
= find_pc_overlay (pc
);
4874 sal
.explicit_pc
= 1;
4876 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
4880 /* Tell the user we have just set a breakpoint B. */
4883 mention (struct breakpoint
*b
)
4886 struct cleanup
*old_chain
, *ui_out_chain
;
4887 struct ui_stream
*stb
;
4889 stb
= ui_out_stream_new (uiout
);
4890 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4892 /* FIXME: This is misplaced; mention() is called by things (like
4893 hitting a watchpoint) other than breakpoint creation. It should
4894 be possible to clean this up and at the same time replace the
4895 random calls to breakpoint_changed with this hook, as has already
4896 been done for deprecated_delete_breakpoint_hook and so on. */
4897 if (deprecated_create_breakpoint_hook
)
4898 deprecated_create_breakpoint_hook (b
);
4899 breakpoint_create_event (b
->number
);
4901 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4902 b
->ops
->print_mention (b
);
4907 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4910 ui_out_text (uiout
, "Watchpoint ");
4911 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4912 ui_out_field_int (uiout
, "number", b
->number
);
4913 ui_out_text (uiout
, ": ");
4914 print_expression (b
->exp
, stb
->stream
);
4915 ui_out_field_stream (uiout
, "exp", stb
);
4916 do_cleanups (ui_out_chain
);
4918 case bp_hardware_watchpoint
:
4919 ui_out_text (uiout
, "Hardware watchpoint ");
4920 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4921 ui_out_field_int (uiout
, "number", b
->number
);
4922 ui_out_text (uiout
, ": ");
4923 print_expression (b
->exp
, stb
->stream
);
4924 ui_out_field_stream (uiout
, "exp", stb
);
4925 do_cleanups (ui_out_chain
);
4927 case bp_read_watchpoint
:
4928 ui_out_text (uiout
, "Hardware read watchpoint ");
4929 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4930 ui_out_field_int (uiout
, "number", b
->number
);
4931 ui_out_text (uiout
, ": ");
4932 print_expression (b
->exp
, stb
->stream
);
4933 ui_out_field_stream (uiout
, "exp", stb
);
4934 do_cleanups (ui_out_chain
);
4936 case bp_access_watchpoint
:
4937 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4938 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4939 ui_out_field_int (uiout
, "number", b
->number
);
4940 ui_out_text (uiout
, ": ");
4941 print_expression (b
->exp
, stb
->stream
);
4942 ui_out_field_stream (uiout
, "exp", stb
);
4943 do_cleanups (ui_out_chain
);
4946 if (ui_out_is_mi_like_p (uiout
))
4951 if (b
->disposition
== disp_del
)
4952 printf_filtered (_("Temporary breakpoint"));
4954 printf_filtered (_("Breakpoint"));
4955 printf_filtered (_(" %d"), b
->number
);
4958 case bp_hardware_breakpoint
:
4959 if (ui_out_is_mi_like_p (uiout
))
4964 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4968 case bp_catch_unload
:
4969 printf_filtered (_("Catchpoint %d (%s %s)"),
4971 (b
->type
== bp_catch_load
) ? "load" : "unload",
4972 (b
->dll_pathname
!= NULL
) ?
4973 b
->dll_pathname
: "<any library>");
4976 case bp_catch_vfork
:
4977 printf_filtered (_("Catchpoint %d (%s)"),
4979 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4982 printf_filtered (_("Catchpoint %d (exec)"),
4989 case bp_longjmp_resume
:
4990 case bp_step_resume
:
4992 case bp_watchpoint_scope
:
4993 case bp_shlib_event
:
4994 case bp_thread_event
:
4995 case bp_overlay_event
:
5001 /* i18n: cagney/2005-02-11: Below needs to be merged into a
5005 printf_filtered (_(" (%s) pending."), b
->addr_string
);
5009 if (addressprint
|| b
->source_file
== NULL
)
5011 printf_filtered (" at ");
5012 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5015 printf_filtered (": file %s, line %d.",
5016 b
->source_file
, b
->line_number
);
5020 struct bp_location
*loc
= b
->loc
;
5022 for (; loc
; loc
= loc
->next
)
5024 printf_filtered (" (%d locations)", n
);
5029 do_cleanups (old_chain
);
5030 if (ui_out_is_mi_like_p (uiout
))
5032 printf_filtered ("\n");
5036 static struct bp_location
*
5037 add_location_to_breakpoint (struct breakpoint
*b
, enum bptype bptype
,
5038 const struct symtab_and_line
*sal
)
5040 struct bp_location
*loc
, **tmp
;
5042 loc
= allocate_bp_location (b
, bptype
);
5043 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5046 loc
->requested_address
= sal
->pc
;
5047 loc
->address
= adjust_breakpoint_address (loc
->requested_address
,
5049 loc
->section
= sal
->section
;
5051 set_breakpoint_location_function (loc
);
5055 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5056 as textual description of the location, and COND_STRING
5057 as condition expression. */
5060 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5062 enum bptype type
, enum bpdisp disposition
,
5063 int thread
, int ignore_count
,
5064 struct breakpoint_ops
*ops
, int from_tty
)
5066 struct breakpoint
*b
= NULL
;
5069 if (type
== bp_hardware_breakpoint
)
5071 int i
= hw_breakpoint_used_count ();
5072 int target_resources_ok
=
5073 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5075 if (target_resources_ok
== 0)
5076 error (_("No hardware breakpoint support in the target."));
5077 else if (target_resources_ok
< 0)
5078 error (_("Hardware breakpoints used exceeds limit."));
5081 for (i
= 0; i
< sals
.nelts
; ++i
)
5083 struct symtab_and_line sal
= sals
.sals
[i
];
5084 struct bp_location
*loc
;
5087 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5091 b
= set_raw_breakpoint (sal
, type
);
5092 set_breakpoint_count (breakpoint_count
+ 1);
5093 b
->number
= breakpoint_count
;
5096 b
->cond_string
= cond_string
;
5097 b
->ignore_count
= ignore_count
;
5098 b
->enable_state
= bp_enabled
;
5099 b
->disposition
= disposition
;
5105 loc
= add_location_to_breakpoint (b
, type
, &sal
);
5110 char *arg
= b
->cond_string
;
5111 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5113 error (_("Garbage %s follows condition"), arg
);
5118 b
->addr_string
= addr_string
;
5120 /* addr_string has to be used or breakpoint_re_set will delete
5122 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5128 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5129 elements to fill the void space. */
5130 static void remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5132 int i
= index_to_remove
+1;
5133 int last_index
= sal
->nelts
-1;
5135 for (;i
<= last_index
; ++i
)
5136 sal
->sals
[i
-1] = sal
->sals
[i
];
5141 /* If appropriate, obtains all sals that correspond
5142 to the same file and line as SAL. This is done
5143 only if SAL does not have explicit PC and has
5144 line and file information. If we got just a single
5145 expanded sal, return the original.
5147 Otherwise, if SAL.explicit_line is not set, filter out
5148 all sals for which the name of enclosing function
5149 is different from SAL. This makes sure that if we have
5150 breakpoint originally set in template instantiation, say
5151 foo<int>(), we won't expand SAL to locations at the same
5152 line in all existing instantiations of 'foo'.
5155 struct symtabs_and_lines
5156 expand_line_sal_maybe (struct symtab_and_line sal
)
5158 struct symtabs_and_lines expanded
;
5159 CORE_ADDR original_pc
= sal
.pc
;
5160 char *original_function
= NULL
;
5164 /* If we have explicit pc, don't expand.
5165 If we have no line number, we can't expand. */
5166 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5169 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5170 expanded
.sals
[0] = sal
;
5175 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5177 expanded
= expand_line_sal (sal
);
5178 if (expanded
.nelts
== 1)
5180 /* We had one sal, we got one sal. Without futher
5181 processing, just return the original sal. */
5182 xfree (expanded
.sals
);
5184 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5185 sal
.pc
= original_pc
;
5186 expanded
.sals
[0] = sal
;
5190 if (!sal
.explicit_line
)
5192 CORE_ADDR func_addr
, func_end
;
5193 for (i
= 0; i
< expanded
.nelts
; ++i
)
5195 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5196 char *this_function
;
5197 if (find_pc_partial_function (pc
, &this_function
,
5198 &func_addr
, &func_end
))
5200 if (this_function
&&
5201 strcmp (this_function
, original_function
) != 0)
5203 remove_sal (&expanded
, i
);
5206 else if (func_addr
== pc
)
5208 /* We're at beginning of a function, and should
5210 struct symbol
*sym
= find_pc_function (pc
);
5212 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5215 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5222 if (expanded
.nelts
<= 1)
5224 /* This is un ugly workaround. If we get zero
5225 expanded sals then something is really wrong.
5226 Fix that by returnign the original sal. */
5227 xfree (expanded
.sals
);
5229 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5230 sal
.pc
= original_pc
;
5231 expanded
.sals
[0] = sal
;
5238 for (i
= 0; i
< expanded
.nelts
; ++i
)
5239 if (expanded
.sals
[i
].pc
== original_pc
)
5250 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5251 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5252 value. COND_STRING, if not NULL, specified the condition to be
5253 used for all breakpoints. Essentially the only case where
5254 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5255 function. In that case, it's still not possible to specify
5256 separate conditions for different overloaded functions, so
5257 we take just a single condition string.
5259 NOTE: If the function succeeds, the caller is expected to cleanup
5260 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5261 array contents). If the function fails (error() is called), the
5262 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5263 COND and SALS arrays and each of those arrays contents. */
5266 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5268 enum bptype type
, enum bpdisp disposition
,
5269 int thread
, int ignore_count
,
5270 struct breakpoint_ops
*ops
, int from_tty
)
5273 for (i
= 0; i
< sals
.nelts
; ++i
)
5275 struct symtabs_and_lines expanded
=
5276 expand_line_sal_maybe (sals
.sals
[i
]);
5278 create_breakpoint (expanded
, addr_string
[i
],
5279 cond_string
, type
, disposition
,
5280 thread
, ignore_count
, ops
, from_tty
);
5283 update_global_location_list ();
5286 /* Parse ARG which is assumed to be a SAL specification possibly
5287 followed by conditionals. On return, SALS contains an array of SAL
5288 addresses found. ADDR_STRING contains a vector of (canonical)
5289 address strings. ARG points to the end of the SAL. */
5292 parse_breakpoint_sals (char **address
,
5293 struct symtabs_and_lines
*sals
,
5294 char ***addr_string
,
5297 char *addr_start
= *address
;
5298 *addr_string
= NULL
;
5299 /* If no arg given, or if first arg is 'if ', use the default
5301 if ((*address
) == NULL
5302 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5304 if (default_breakpoint_valid
)
5306 struct symtab_and_line sal
;
5307 init_sal (&sal
); /* initialize to zeroes */
5308 sals
->sals
= (struct symtab_and_line
*)
5309 xmalloc (sizeof (struct symtab_and_line
));
5310 sal
.pc
= default_breakpoint_address
;
5311 sal
.line
= default_breakpoint_line
;
5312 sal
.symtab
= default_breakpoint_symtab
;
5313 sal
.section
= find_pc_overlay (sal
.pc
);
5314 sals
->sals
[0] = sal
;
5318 error (_("No default breakpoint address now."));
5322 /* Force almost all breakpoints to be in terms of the
5323 current_source_symtab (which is decode_line_1's default). This
5324 should produce the results we want almost all of the time while
5325 leaving default_breakpoint_* alone.
5326 ObjC: However, don't match an Objective-C method name which
5327 may have a '+' or '-' succeeded by a '[' */
5329 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5331 if (default_breakpoint_valid
5333 || ((strchr ("+-", (*address
)[0]) != NULL
)
5334 && ((*address
)[1] != '['))))
5335 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5336 default_breakpoint_line
, addr_string
,
5339 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5340 addr_string
, not_found_ptr
);
5342 /* For any SAL that didn't have a canonical string, fill one in. */
5343 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5344 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5345 if (addr_start
!= (*address
))
5348 for (i
= 0; i
< sals
->nelts
; i
++)
5350 /* Add the string if not present. */
5351 if ((*addr_string
)[i
] == NULL
)
5352 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5358 /* Convert each SAL into a real PC. Verify that the PC can be
5359 inserted as a breakpoint. If it can't throw an error. */
5362 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5366 for (i
= 0; i
< sals
->nelts
; i
++)
5367 resolve_sal_pc (&sals
->sals
[i
]);
5371 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5373 struct captured_parse_breakpoint_args
*args
= data
;
5375 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5376 args
->not_found_ptr
);
5379 /* Given TOK, a string specification of condition and thread, as
5380 accepted by the 'break' command, extract the condition
5381 string and thread number and set *COND_STRING and *THREAD.
5382 PC identifies the context at which the condition should be parsed.
5383 If no condition is found, *COND_STRING is set to NULL.
5384 If no thread is found, *THREAD is set to -1. */
5386 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5387 char **cond_string
, int *thread
)
5389 *cond_string
= NULL
;
5395 char *cond_start
= NULL
;
5396 char *cond_end
= NULL
;
5397 while (*tok
== ' ' || *tok
== '\t')
5402 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5405 toklen
= end_tok
- tok
;
5407 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5409 tok
= cond_start
= end_tok
+ 1;
5410 parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5412 *cond_string
= savestring (cond_start
,
5413 cond_end
- cond_start
);
5415 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5421 *thread
= strtol (tok
, &tok
, 0);
5423 error (_("Junk after thread keyword."));
5424 if (!valid_thread_id (*thread
))
5425 error (_("Unknown thread %d."), *thread
);
5428 error (_("Junk at end of arguments."));
5432 /* Set a breakpoint. This function is shared between
5433 CLI and MI functions for setting a breakpoint.
5434 This function has two major modes of operations,
5435 selected by the PARSE_CONDITION_AND_THREAD parameter.
5436 If non-zero, the function will parse arg, extracting
5437 breakpoint location, address and thread. Otherwise,
5438 ARG is just the location of breakpoint, with condition
5439 and thread specified by the COND_STRING and THREAD
5443 break_command_really (char *arg
, char *cond_string
, int thread
,
5444 int parse_condition_and_thread
,
5445 int tempflag
, int hardwareflag
,
5447 enum auto_boolean pending_break_support
,
5448 struct breakpoint_ops
*ops
,
5451 struct gdb_exception e
;
5452 struct symtabs_and_lines sals
;
5453 struct symtab_and_line pending_sal
;
5456 char *addr_start
= arg
;
5458 struct cleanup
*old_chain
;
5459 struct cleanup
*breakpoint_chain
= NULL
;
5460 struct captured_parse_breakpoint_args parse_args
;
5469 parse_args
.arg_p
= &arg
;
5470 parse_args
.sals_p
= &sals
;
5471 parse_args
.addr_string_p
= &addr_string
;
5472 parse_args
.not_found_ptr
= ¬_found
;
5474 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5475 &parse_args
, RETURN_MASK_ALL
);
5477 /* If caller is interested in rc value from parse, set value. */
5481 throw_exception (e
);
5485 case NOT_FOUND_ERROR
:
5487 /* If pending breakpoint support is turned off, throw
5490 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5491 throw_exception (e
);
5493 exception_print (gdb_stderr
, e
);
5495 /* If pending breakpoint support is auto query and the user
5496 selects no, then simply return the error code. */
5497 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5498 !nquery ("Make breakpoint pending on future shared library load? "))
5501 /* At this point, either the user was queried about setting
5502 a pending breakpoint and selected yes, or pending
5503 breakpoint behavior is on and thus a pending breakpoint
5504 is defaulted on behalf of the user. */
5505 copy_arg
= xstrdup (addr_start
);
5506 addr_string
= ©_arg
;
5508 sals
.sals
= &pending_sal
;
5513 throw_exception (e
);
5520 /* Create a chain of things that always need to be cleaned up. */
5521 old_chain
= make_cleanup (null_cleanup
, 0);
5525 /* Make sure that all storage allocated to SALS gets freed. */
5526 make_cleanup (xfree
, sals
.sals
);
5528 /* Cleanup the addr_string array but not its contents. */
5529 make_cleanup (xfree
, addr_string
);
5532 /* ----------------------------- SNIP -----------------------------
5533 Anything added to the cleanup chain beyond this point is assumed
5534 to be part of a breakpoint. If the breakpoint create succeeds
5535 then the memory is not reclaimed. */
5536 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5538 /* Mark the contents of the addr_string for cleanup. These go on
5539 the breakpoint_chain and only occure if the breakpoint create
5541 for (i
= 0; i
< sals
.nelts
; i
++)
5543 if (addr_string
[i
] != NULL
)
5544 make_cleanup (xfree
, addr_string
[i
]);
5547 /* Resolve all line numbers to PC's and verify that the addresses
5548 are ok for the target. */
5550 breakpoint_sals_to_pc (&sals
, addr_start
);
5552 /* Verify that condition can be parsed, before setting any
5553 breakpoints. Allocate a separate condition expression for each
5557 if (parse_condition_and_thread
)
5559 /* Here we only parse 'arg' to separate condition
5560 from thread number, so parsing in context of first
5561 sal is OK. When setting the breakpoint we'll
5562 re-parse it in context of each sal. */
5565 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5567 make_cleanup (xfree
, cond_string
);
5571 /* Create a private copy of condition string. */
5574 cond_string
= xstrdup (cond_string
);
5575 make_cleanup (xfree
, cond_string
);
5578 create_breakpoints (sals
, addr_string
, cond_string
,
5579 hardwareflag
? bp_hardware_breakpoint
5581 tempflag
? disp_del
: disp_donttouch
,
5582 thread
, ignore_count
, ops
, from_tty
);
5586 struct symtab_and_line sal
= {0};
5587 struct breakpoint
*b
;
5589 make_cleanup (xfree
, copy_arg
);
5591 b
= set_raw_breakpoint_without_location (hardwareflag
5592 ? bp_hardware_breakpoint
5594 set_breakpoint_count (breakpoint_count
+ 1);
5595 b
->number
= breakpoint_count
;
5597 b
->addr_string
= addr_string
[0];
5598 b
->cond_string
= NULL
;
5599 b
->ignore_count
= ignore_count
;
5600 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5601 b
->condition_not_parsed
= 1;
5604 update_global_location_list ();
5609 warning (_("Multiple breakpoints were set.\n"
5610 "Use the \"delete\" command to delete unwanted breakpoints."));
5611 /* That's it. Discard the cleanups for data inserted into the
5613 discard_cleanups (breakpoint_chain
);
5614 /* But cleanup everything else. */
5615 do_cleanups (old_chain
);
5618 /* Set a breakpoint.
5619 ARG is a string describing breakpoint address,
5620 condition, and thread.
5621 FLAG specifies if a breakpoint is hardware on,
5622 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5626 break_command_1 (char *arg
, int flag
, int from_tty
)
5628 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5629 int tempflag
= flag
& BP_TEMPFLAG
;
5631 break_command_really (arg
,
5632 NULL
, 0, 1 /* parse arg */,
5633 tempflag
, hardwareflag
,
5634 0 /* Ignore count */,
5635 pending_break_support
,
5636 NULL
/* breakpoint_ops */,
5642 set_breakpoint (char *address
, char *condition
,
5643 int hardwareflag
, int tempflag
,
5644 int thread
, int ignore_count
,
5647 break_command_really (address
, condition
, thread
,
5648 0 /* condition and thread are valid. */,
5649 tempflag
, hardwareflag
,
5652 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5656 /* Adjust SAL to the first instruction past the function prologue.
5657 The end of the prologue is determined using the line table from
5658 the debugging information.
5660 If SAL is already past the prologue, then do nothing. */
5663 skip_prologue_sal (struct symtab_and_line
*sal
)
5665 struct symbol
*sym
= find_pc_function (sal
->pc
);
5666 struct symtab_and_line start_sal
;
5671 start_sal
= find_function_start_sal (sym
, 1);
5672 if (sal
->pc
< start_sal
.pc
)
5676 /* Helper function for break_command_1 and disassemble_command. */
5679 resolve_sal_pc (struct symtab_and_line
*sal
)
5683 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5685 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5686 error (_("No line %d in file \"%s\"."),
5687 sal
->line
, sal
->symtab
->filename
);
5690 /* If this SAL corresponds to a breakpoint inserted using
5691 a line number, then skip the function prologue if necessary. */
5692 if (sal
->explicit_line
)
5693 skip_prologue_sal (sal
);
5696 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5698 struct blockvector
*bv
;
5702 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5705 sym
= block_function (b
);
5708 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5709 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5713 /* It really is worthwhile to have the section, so we'll just
5714 have to look harder. This case can be executed if we have
5715 line numbers but no functions (as can happen in assembly
5718 struct minimal_symbol
*msym
;
5720 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5722 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5729 break_command (char *arg
, int from_tty
)
5731 break_command_1 (arg
, 0, from_tty
);
5735 tbreak_command (char *arg
, int from_tty
)
5737 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5741 hbreak_command (char *arg
, int from_tty
)
5743 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5747 thbreak_command (char *arg
, int from_tty
)
5749 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5753 stop_command (char *arg
, int from_tty
)
5755 printf_filtered (_("Specify the type of breakpoint to set.\n\
5756 Usage: stop in <function | address>\n\
5757 stop at <line>\n"));
5761 stopin_command (char *arg
, int from_tty
)
5765 if (arg
== (char *) NULL
)
5767 else if (*arg
!= '*')
5772 /* look for a ':'. If this is a line number specification, then
5773 say it is bad, otherwise, it should be an address or
5774 function/method name */
5775 while (*argptr
&& !hasColon
)
5777 hasColon
= (*argptr
== ':');
5782 badInput
= (*argptr
!= ':'); /* Not a class::method */
5784 badInput
= isdigit (*arg
); /* a simple line number */
5788 printf_filtered (_("Usage: stop in <function | address>\n"));
5790 break_command_1 (arg
, 0, from_tty
);
5794 stopat_command (char *arg
, int from_tty
)
5798 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5805 /* look for a ':'. If there is a '::' then get out, otherwise
5806 it is probably a line number. */
5807 while (*argptr
&& !hasColon
)
5809 hasColon
= (*argptr
== ':');
5814 badInput
= (*argptr
== ':'); /* we have class::method */
5816 badInput
= !isdigit (*arg
); /* not a line number */
5820 printf_filtered (_("Usage: stop at <line>\n"));
5822 break_command_1 (arg
, 0, from_tty
);
5825 /* accessflag: hw_write: watch write,
5826 hw_read: watch read,
5827 hw_access: watch access (read or write) */
5829 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5831 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
5832 struct symtab_and_line sal
;
5833 struct expression
*exp
;
5834 struct block
*exp_valid_block
;
5835 struct value
*val
, *mark
;
5836 struct frame_info
*frame
;
5837 struct frame_info
*prev_frame
= NULL
;
5838 char *exp_start
= NULL
;
5839 char *exp_end
= NULL
;
5840 char *tok
, *id_tok_start
, *end_tok
;
5842 char *cond_start
= NULL
;
5843 char *cond_end
= NULL
;
5844 struct expression
*cond
= NULL
;
5845 int i
, other_type_used
, target_resources_ok
= 0;
5846 enum bptype bp_type
;
5850 init_sal (&sal
); /* initialize to zeroes */
5852 /* Make sure that we actually have parameters to parse. */
5853 if (arg
!= NULL
&& arg
[0] != '\0')
5855 toklen
= strlen (arg
); /* Size of argument list. */
5857 /* Points tok to the end of the argument list. */
5858 tok
= arg
+ toklen
- 1;
5860 /* Go backwards in the parameters list. Skip the last parameter.
5861 If we're expecting a 'thread <thread_num>' parameter, this should
5862 be the thread identifier. */
5863 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5865 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5868 /* Points end_tok to the beginning of the last token. */
5869 id_tok_start
= tok
+ 1;
5871 /* Go backwards in the parameters list. Skip one more parameter.
5872 If we're expecting a 'thread <thread_num>' parameter, we should
5873 reach a "thread" token. */
5874 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5879 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5882 /* Move the pointer forward to skip the whitespace and
5883 calculate the length of the token. */
5885 toklen
= end_tok
- tok
;
5887 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5889 /* At this point we've found a "thread" token, which means
5890 the user is trying to set a watchpoint that triggers
5891 only in a specific thread. */
5894 /* Extract the thread ID from the next token. */
5895 thread
= strtol (id_tok_start
, &endp
, 0);
5897 /* Check if the user provided a valid numeric value for the
5899 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
5900 error (_("Invalid thread ID specification %s."), id_tok_start
);
5902 /* Check if the thread actually exists. */
5903 if (!valid_thread_id (thread
))
5904 error (_("Unknown thread %d."), thread
);
5906 /* Truncate the string and get rid of the thread <thread_num>
5907 parameter before the parameter list is parsed by the
5908 evaluate_expression() function. */
5913 /* Parse the rest of the arguments. */
5914 innermost_block
= NULL
;
5916 exp
= parse_exp_1 (&arg
, 0, 0);
5918 exp_valid_block
= innermost_block
;
5919 mark
= value_mark ();
5920 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
5922 release_value (val
);
5925 while (*tok
== ' ' || *tok
== '\t')
5929 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5932 toklen
= end_tok
- tok
;
5933 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5935 tok
= cond_start
= end_tok
+ 1;
5936 cond
= parse_exp_1 (&tok
, 0, 0);
5940 error (_("Junk at end of command."));
5942 if (accessflag
== hw_read
)
5943 bp_type
= bp_read_watchpoint
;
5944 else if (accessflag
== hw_access
)
5945 bp_type
= bp_access_watchpoint
;
5947 bp_type
= bp_hardware_watchpoint
;
5949 mem_cnt
= can_use_hardware_watchpoint (val
);
5950 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5951 error (_("Expression cannot be implemented with read/access watchpoint."));
5954 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5955 target_resources_ok
=
5956 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5958 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5959 error (_("Target does not support this type of hardware watchpoint."));
5961 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5962 error (_("Target can only support one kind of HW watchpoint at a time."));
5965 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5966 watchpoint could not be set. */
5967 if (!mem_cnt
|| target_resources_ok
<= 0)
5968 bp_type
= bp_watchpoint
;
5970 frame
= block_innermost_frame (exp_valid_block
);
5972 prev_frame
= get_prev_frame (frame
);
5976 /* If the expression is "local", then set up a "watchpoint scope"
5977 breakpoint at the point where we've left the scope of the watchpoint
5978 expression. Create the scope breakpoint before the watchpoint, so
5979 that we will encounter it first in bpstat_stop_status. */
5980 if (innermost_block
&& prev_frame
)
5982 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5983 bp_watchpoint_scope
);
5985 scope_breakpoint
->enable_state
= bp_enabled
;
5987 /* Automatically delete the breakpoint when it hits. */
5988 scope_breakpoint
->disposition
= disp_del
;
5990 /* Only break in the proper frame (help with recursion). */
5991 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5993 /* Set the address at which we will stop. */
5994 scope_breakpoint
->loc
->requested_address
5995 = get_frame_pc (prev_frame
);
5996 scope_breakpoint
->loc
->address
5997 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
5998 scope_breakpoint
->type
);
6001 /* Now set up the breakpoint. */
6002 b
= set_raw_breakpoint (sal
, bp_type
);
6003 set_breakpoint_count (breakpoint_count
+ 1);
6004 b
->number
= breakpoint_count
;
6006 b
->disposition
= disp_donttouch
;
6008 b
->exp_valid_block
= exp_valid_block
;
6009 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6012 b
->loc
->cond
= cond
;
6014 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6019 b
->watchpoint_frame
= get_frame_id (frame
);
6021 b
->watchpoint_frame
= null_frame_id
;
6023 if (scope_breakpoint
!= NULL
)
6025 /* The scope breakpoint is related to the watchpoint. We will
6026 need to act on them together. */
6027 b
->related_breakpoint
= scope_breakpoint
;
6028 scope_breakpoint
->related_breakpoint
= b
;
6031 value_free_to_mark (mark
);
6033 update_global_location_list ();
6036 /* Return count of locations need to be watched and can be handled
6037 in hardware. If the watchpoint can not be handled
6038 in hardware return zero. */
6041 can_use_hardware_watchpoint (struct value
*v
)
6043 int found_memory_cnt
= 0;
6044 struct value
*head
= v
;
6046 /* Did the user specifically forbid us to use hardware watchpoints? */
6047 if (!can_use_hw_watchpoints
)
6050 /* Make sure that the value of the expression depends only upon
6051 memory contents, and values computed from them within GDB. If we
6052 find any register references or function calls, we can't use a
6053 hardware watchpoint.
6055 The idea here is that evaluating an expression generates a series
6056 of values, one holding the value of every subexpression. (The
6057 expression a*b+c has five subexpressions: a, b, a*b, c, and
6058 a*b+c.) GDB's values hold almost enough information to establish
6059 the criteria given above --- they identify memory lvalues,
6060 register lvalues, computed values, etcetera. So we can evaluate
6061 the expression, and then scan the chain of values that leaves
6062 behind to decide whether we can detect any possible change to the
6063 expression's final value using only hardware watchpoints.
6065 However, I don't think that the values returned by inferior
6066 function calls are special in any way. So this function may not
6067 notice that an expression involving an inferior function call
6068 can't be watched with hardware watchpoints. FIXME. */
6069 for (; v
; v
= value_next (v
))
6071 if (VALUE_LVAL (v
) == lval_memory
)
6074 /* A lazy memory lvalue is one that GDB never needed to fetch;
6075 we either just used its address (e.g., `a' in `a.b') or
6076 we never needed it at all (e.g., `a' in `a,b'). */
6080 /* Ahh, memory we actually used! Check if we can cover
6081 it with hardware watchpoints. */
6082 struct type
*vtype
= check_typedef (value_type (v
));
6084 /* We only watch structs and arrays if user asked for it
6085 explicitly, never if they just happen to appear in a
6086 middle of some value chain. */
6088 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6089 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6091 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
6092 int len
= TYPE_LENGTH (value_type (v
));
6094 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6101 else if (VALUE_LVAL (v
) != not_lval
6102 && deprecated_value_modifiable (v
) == 0)
6103 return 0; /* ??? What does this represent? */
6104 else if (VALUE_LVAL (v
) == lval_register
)
6105 return 0; /* cannot watch a register with a HW watchpoint */
6108 /* The expression itself looks suitable for using a hardware
6109 watchpoint, but give the target machine a chance to reject it. */
6110 return found_memory_cnt
;
6114 watch_command_wrapper (char *arg
, int from_tty
)
6116 watch_command (arg
, from_tty
);
6120 watch_command (char *arg
, int from_tty
)
6122 watch_command_1 (arg
, hw_write
, from_tty
);
6126 rwatch_command_wrapper (char *arg
, int from_tty
)
6128 rwatch_command (arg
, from_tty
);
6132 rwatch_command (char *arg
, int from_tty
)
6134 watch_command_1 (arg
, hw_read
, from_tty
);
6138 awatch_command_wrapper (char *arg
, int from_tty
)
6140 awatch_command (arg
, from_tty
);
6144 awatch_command (char *arg
, int from_tty
)
6146 watch_command_1 (arg
, hw_access
, from_tty
);
6150 /* Helper routines for the until_command routine in infcmd.c. Here
6151 because it uses the mechanisms of breakpoints. */
6153 /* This function is called by fetch_inferior_event via the
6154 cmd_continuation pointer, to complete the until command. It takes
6155 care of cleaning up the temporary breakpoints set up by the until
6158 until_break_command_continuation (struct continuation_arg
*arg
, int error
)
6160 delete_breakpoint ((struct breakpoint
*)(arg
->data
.pointer
));
6162 delete_breakpoint ((struct breakpoint
*)(arg
->next
->data
.pointer
));
6166 until_break_command (char *arg
, int from_tty
, int anywhere
)
6168 struct symtabs_and_lines sals
;
6169 struct symtab_and_line sal
;
6170 struct frame_info
*frame
= get_selected_frame (NULL
);
6171 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6172 struct breakpoint
*breakpoint
;
6173 struct breakpoint
*breakpoint2
= NULL
;
6174 struct cleanup
*old_chain
;
6175 struct continuation_arg
*arg1
;
6176 struct continuation_arg
*arg2
;
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 () && target_executing
)
6235 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
6237 arg1
->data
.pointer
= breakpoint
;
6241 arg2
= (struct continuation_arg
*)
6242 xmalloc ( sizeof (struct continuation_arg
));
6244 arg2
->data
.pointer
= breakpoint2
;
6248 discard_cleanups (old_chain
);
6249 add_continuation (until_break_command_continuation
, arg1
);
6252 do_cleanups (old_chain
);
6256 ep_skip_leading_whitespace (char **s
)
6258 if ((s
== NULL
) || (*s
== NULL
))
6260 while (isspace (**s
))
6264 /* This function examines a string, and attempts to find a token
6265 that might be an event name in the leading characters. If a
6266 possible match is found, a pointer to the last character of
6267 the token is returned. Else, NULL is returned. */
6270 ep_find_event_name_end (char *arg
)
6273 char *event_name_end
= NULL
;
6275 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6279 /* We break out of the loop when we find a token delimiter.
6280 Basically, we're looking for alphanumerics and underscores;
6281 anything else delimites the token. */
6284 if (!isalnum (*s
) && (*s
!= '_'))
6290 return event_name_end
;
6294 /* This function attempts to parse an optional "if <cond>" clause
6295 from the arg string. If one is not found, it returns NULL.
6297 Else, it returns a pointer to the condition string. (It does not
6298 attempt to evaluate the string against a particular block.) And,
6299 it updates arg to point to the first character following the parsed
6300 if clause in the arg string. */
6303 ep_parse_optional_if_clause (char **arg
)
6307 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6310 /* Skip the "if" keyword. */
6313 /* Skip any extra leading whitespace, and record the start of the
6314 condition string. */
6315 ep_skip_leading_whitespace (arg
);
6318 /* Assume that the condition occupies the remainder of the arg string. */
6319 (*arg
) += strlen (cond_string
);
6324 /* This function attempts to parse an optional filename from the arg
6325 string. If one is not found, it returns NULL.
6327 Else, it returns a pointer to the parsed filename. (This function
6328 makes no attempt to verify that a file of that name exists, or is
6329 accessible.) And, it updates arg to point to the first character
6330 following the parsed filename in the arg string.
6332 Note that clients needing to preserve the returned filename for
6333 future access should copy it to their own buffers. */
6335 ep_parse_optional_filename (char **arg
)
6337 static char filename
[1024];
6342 if ((*arg_p
== '\0') || isspace (*arg_p
))
6360 /* Commands to deal with catching events, such as signals, exceptions,
6361 process start/exit, etc. */
6365 catch_fork
, catch_vfork
6370 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6373 char *cond_string
= NULL
;
6375 ep_skip_leading_whitespace (&arg
);
6377 /* The allowed syntax is:
6379 catch [v]fork if <cond>
6381 First, check if there's an if clause. */
6382 cond_string
= ep_parse_optional_if_clause (&arg
);
6384 if ((*arg
!= '\0') && !isspace (*arg
))
6385 error (_("Junk at end of arguments."));
6387 /* If this target supports it, create a fork or vfork catchpoint
6388 and enable reporting of such events. */
6392 create_fork_event_catchpoint (tempflag
, cond_string
);
6395 create_vfork_event_catchpoint (tempflag
, cond_string
);
6398 error (_("unsupported or unknown fork kind; cannot catch it"));
6404 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6406 char *cond_string
= NULL
;
6408 ep_skip_leading_whitespace (&arg
);
6410 /* The allowed syntax is:
6412 catch exec if <cond>
6414 First, check if there's an if clause. */
6415 cond_string
= ep_parse_optional_if_clause (&arg
);
6417 if ((*arg
!= '\0') && !isspace (*arg
))
6418 error (_("Junk at end of arguments."));
6420 /* If this target supports it, create an exec catchpoint
6421 and enable reporting of such events. */
6422 create_exec_event_catchpoint (tempflag
, cond_string
);
6426 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6428 char *dll_pathname
= NULL
;
6429 char *cond_string
= NULL
;
6431 ep_skip_leading_whitespace (&arg
);
6433 /* The allowed syntax is:
6435 catch load if <cond>
6436 catch load <filename>
6437 catch load <filename> if <cond>
6439 The user is not allowed to specify the <filename> after an
6442 We'll ignore the pathological case of a file named "if".
6444 First, check if there's an if clause. If so, then there
6445 cannot be a filename. */
6446 cond_string
= ep_parse_optional_if_clause (&arg
);
6448 /* If there was an if clause, then there cannot be a filename.
6449 Else, there might be a filename and an if clause. */
6450 if (cond_string
== NULL
)
6452 dll_pathname
= ep_parse_optional_filename (&arg
);
6453 ep_skip_leading_whitespace (&arg
);
6454 cond_string
= ep_parse_optional_if_clause (&arg
);
6457 if ((*arg
!= '\0') && !isspace (*arg
))
6458 error (_("Junk at end of arguments."));
6460 /* Create a load breakpoint that only triggers when a load of
6461 the specified dll (or any dll, if no pathname was specified)
6463 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6464 dll_pathname
, cond_string
);
6468 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6470 char *dll_pathname
= NULL
;
6471 char *cond_string
= NULL
;
6473 ep_skip_leading_whitespace (&arg
);
6475 /* The allowed syntax is:
6477 catch unload if <cond>
6478 catch unload <filename>
6479 catch unload <filename> if <cond>
6481 The user is not allowed to specify the <filename> after an
6484 We'll ignore the pathological case of a file named "if".
6486 First, check if there's an if clause. If so, then there
6487 cannot be a filename. */
6488 cond_string
= ep_parse_optional_if_clause (&arg
);
6490 /* If there was an if clause, then there cannot be a filename.
6491 Else, there might be a filename and an if clause. */
6492 if (cond_string
== NULL
)
6494 dll_pathname
= ep_parse_optional_filename (&arg
);
6495 ep_skip_leading_whitespace (&arg
);
6496 cond_string
= ep_parse_optional_if_clause (&arg
);
6499 if ((*arg
!= '\0') && !isspace (*arg
))
6500 error (_("Junk at end of arguments."));
6502 /* Create an unload breakpoint that only triggers when an unload of
6503 the specified dll (or any dll, if no pathname was specified)
6505 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6506 dll_pathname
, cond_string
);
6509 static enum print_stop_action
6510 print_exception_catchpoint (struct breakpoint
*b
)
6512 int bp_temp
, bp_throw
;
6514 annotate_catchpoint (b
->number
);
6516 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6517 if (b
->loc
->address
!= b
->loc
->requested_address
)
6518 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6521 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6523 bp_temp
? "Temporary catchpoint "
6525 if (!ui_out_is_mi_like_p (uiout
))
6526 ui_out_field_int (uiout
, "bkptno", b
->number
);
6528 bp_throw
? " (exception thrown), "
6529 : " (exception caught), ");
6530 if (ui_out_is_mi_like_p (uiout
))
6532 ui_out_field_string (uiout
, "reason",
6533 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6534 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6535 ui_out_field_int (uiout
, "bkptno", b
->number
);
6537 return PRINT_SRC_AND_LOC
;
6541 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6546 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6547 ui_out_field_string (uiout
, "addr", "<PENDING>");
6549 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6553 *last_addr
= b
->loc
->address
;
6554 if (strstr (b
->addr_string
, "throw") != NULL
)
6555 ui_out_field_string (uiout
, "what", "exception throw");
6557 ui_out_field_string (uiout
, "what", "exception catch");
6561 print_mention_exception_catchpoint (struct breakpoint
*b
)
6566 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6567 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6568 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6569 : _("Catchpoint "));
6570 ui_out_field_int (uiout
, "bkptno", b
->number
);
6571 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6575 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6576 print_exception_catchpoint
,
6577 print_one_exception_catchpoint
,
6578 print_mention_exception_catchpoint
6582 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6583 enum exception_event_kind ex_event
, int from_tty
)
6585 char *trigger_func_name
;
6587 if (ex_event
== EX_EVENT_CATCH
)
6588 trigger_func_name
= "__cxa_begin_catch";
6590 trigger_func_name
= "__cxa_throw";
6592 break_command_really (trigger_func_name
, cond_string
, -1,
6593 0 /* condition and thread are valid. */,
6596 AUTO_BOOLEAN_TRUE
/* pending */,
6597 &gnu_v3_exception_catchpoint_ops
, from_tty
);
6602 /* Deal with "catch catch" and "catch throw" commands */
6605 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6606 int tempflag
, int from_tty
)
6608 char *cond_string
= NULL
;
6609 struct symtab_and_line
*sal
= NULL
;
6611 ep_skip_leading_whitespace (&arg
);
6613 cond_string
= ep_parse_optional_if_clause (&arg
);
6615 if ((*arg
!= '\0') && !isspace (*arg
))
6616 error (_("Junk at end of arguments."));
6618 if ((ex_event
!= EX_EVENT_THROW
) &&
6619 (ex_event
!= EX_EVENT_CATCH
))
6620 error (_("Unsupported or unknown exception event; cannot catch it"));
6622 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6625 warning (_("Unsupported with this platform/compiler combination."));
6628 /* Create a breakpoint struct for Ada exception catchpoints. */
6631 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6635 struct expression
*cond
,
6636 struct breakpoint_ops
*ops
,
6640 struct breakpoint
*b
;
6644 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6645 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6646 version for exception catchpoints, because two catchpoints
6647 used for different exception names will use the same address.
6648 In this case, a "breakpoint ... also set at..." warning is
6649 unproductive. Besides. the warning phrasing is also a bit
6650 inapropriate, we should use the word catchpoint, and tell
6651 the user what type of catchpoint it is. The above is good
6652 enough for now, though. */
6655 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6656 set_breakpoint_count (breakpoint_count
+ 1);
6658 b
->enable_state
= bp_enabled
;
6659 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6660 b
->number
= breakpoint_count
;
6661 b
->ignore_count
= 0;
6662 b
->loc
->cond
= cond
;
6663 b
->addr_string
= addr_string
;
6664 b
->language
= language_ada
;
6665 b
->cond_string
= cond_string
;
6666 b
->exp_string
= exp_string
;
6671 update_global_location_list ();
6674 /* Implement the "catch exception" command. */
6677 catch_ada_exception_command (char *arg
, int tempflag
, int from_tty
)
6679 struct symtab_and_line sal
;
6681 char *addr_string
= NULL
;
6682 char *exp_string
= NULL
;
6683 char *cond_string
= NULL
;
6684 struct expression
*cond
= NULL
;
6685 struct breakpoint_ops
*ops
= NULL
;
6687 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6688 &cond_string
, &cond
, &ops
);
6689 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6690 cond_string
, cond
, ops
, tempflag
,
6694 /* Implement the "catch assert" command. */
6697 catch_assert_command (char *arg
, int tempflag
, int from_tty
)
6699 struct symtab_and_line sal
;
6700 char *addr_string
= NULL
;
6701 struct breakpoint_ops
*ops
= NULL
;
6703 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6704 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6705 tempflag
, from_tty
);
6709 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6712 /* The first argument may be an event name, such as "start" or "load".
6713 If so, then handle it as such. If it doesn't match an event name,
6714 then attempt to interpret it as an exception name. (This latter is
6715 the v4.16-and-earlier GDB meaning of the "catch" command.)
6717 First, try to find the bounds of what might be an event name. */
6718 char *arg1_start
= arg
;
6722 if (arg1_start
== NULL
)
6724 /* Old behaviour was to use pre-v-4.16 syntax */
6725 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6727 /* Now, this is not allowed */
6728 error (_("Catch requires an event name."));
6731 arg1_end
= ep_find_event_name_end (arg1_start
);
6732 if (arg1_end
== NULL
)
6733 error (_("catch requires an event"));
6734 arg1_length
= arg1_end
+ 1 - arg1_start
;
6736 /* Try to match what we found against known event names. */
6737 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6739 error (_("Catch of signal not yet implemented"));
6741 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6743 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6744 tempflag
, from_tty
);
6746 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6748 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6749 tempflag
, from_tty
);
6751 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6753 error (_("Catch of thread_start not yet implemented"));
6755 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6757 error (_("Catch of thread_exit not yet implemented"));
6759 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6761 error (_("Catch of thread_join not yet implemented"));
6763 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6765 error (_("Catch of start not yet implemented"));
6767 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6769 error (_("Catch of exit not yet implemented"));
6771 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6773 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6775 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6777 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6779 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6781 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6783 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6785 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6787 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6789 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6791 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6793 error (_("Catch of stop not yet implemented"));
6795 else if (strncmp (arg1_start
, "exception", arg1_length
) == 0)
6797 catch_ada_exception_command (arg1_end
+ 1, tempflag
, from_tty
);
6800 else if (strncmp (arg1_start
, "assert", arg1_length
) == 0)
6802 catch_assert_command (arg1_end
+ 1, tempflag
, from_tty
);
6805 /* This doesn't appear to be an event name */
6809 /* Pre-v.4.16 behaviour was to treat the argument
6810 as the name of an exception */
6811 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6812 /* Now this is not allowed */
6813 error (_("Unknown event kind specified for catch"));
6819 catch_command (char *arg
, int from_tty
)
6821 catch_command_1 (arg
, 0, from_tty
);
6826 tcatch_command (char *arg
, int from_tty
)
6828 catch_command_1 (arg
, 1, from_tty
);
6831 /* Delete breakpoints by address or line. */
6834 clear_command (char *arg
, int from_tty
)
6836 struct breakpoint
*b
;
6837 VEC(breakpoint_p
) *found
= 0;
6840 struct symtabs_and_lines sals
;
6841 struct symtab_and_line sal
;
6846 sals
= decode_line_spec (arg
, 1);
6851 sals
.sals
= (struct symtab_and_line
*)
6852 xmalloc (sizeof (struct symtab_and_line
));
6853 make_cleanup (xfree
, sals
.sals
);
6854 init_sal (&sal
); /* initialize to zeroes */
6855 sal
.line
= default_breakpoint_line
;
6856 sal
.symtab
= default_breakpoint_symtab
;
6857 sal
.pc
= default_breakpoint_address
;
6858 if (sal
.symtab
== 0)
6859 error (_("No source file specified."));
6867 /* We don't call resolve_sal_pc here. That's not
6868 as bad as it seems, because all existing breakpoints
6869 typically have both file/line and pc set. So, if
6870 clear is given file/line, we can match this to existing
6871 breakpoint without obtaining pc at all.
6873 We only support clearing given the address explicitly
6874 present in breakpoint table. Say, we've set breakpoint
6875 at file:line. There were several PC values for that file:line,
6876 due to optimization, all in one block.
6877 We've picked one PC value. If "clear" is issued with another
6878 PC corresponding to the same file:line, the breakpoint won't
6879 be cleared. We probably can still clear the breakpoint, but
6880 since the other PC value is never presented to user, user
6881 can only find it by guessing, and it does not seem important
6884 /* For each line spec given, delete bps which correspond
6885 to it. Do it in two passes, solely to preserve the current
6886 behavior that from_tty is forced true if we delete more than
6890 for (i
= 0; i
< sals
.nelts
; i
++)
6892 /* If exact pc given, clear bpts at that pc.
6893 If line given (pc == 0), clear all bpts on specified line.
6894 If defaulting, clear all bpts on default line
6897 defaulting sal.pc != 0 tests to do
6902 1 0 <can't happen> */
6906 /* Find all matching breakpoints and add them to
6911 /* Are we going to delete b? */
6912 if (b
->type
!= bp_none
6913 && b
->type
!= bp_watchpoint
6914 && b
->type
!= bp_hardware_watchpoint
6915 && b
->type
!= bp_read_watchpoint
6916 && b
->type
!= bp_access_watchpoint
)
6918 struct bp_location
*loc
= b
->loc
;
6919 for (; loc
; loc
= loc
->next
)
6921 int pc_match
= sal
.pc
6922 && (loc
->address
== sal
.pc
)
6923 && (!section_is_overlay (loc
->section
)
6924 || loc
->section
== sal
.section
);
6925 int line_match
= ((default_match
|| (0 == sal
.pc
))
6926 && b
->source_file
!= NULL
6927 && sal
.symtab
!= NULL
6928 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6929 && b
->line_number
== sal
.line
);
6930 if (pc_match
|| line_match
)
6939 VEC_safe_push(breakpoint_p
, found
, b
);
6942 /* Now go thru the 'found' chain and delete them. */
6943 if (VEC_empty(breakpoint_p
, found
))
6946 error (_("No breakpoint at %s."), arg
);
6948 error (_("No breakpoint at this line."));
6951 if (VEC_length(breakpoint_p
, found
) > 1)
6952 from_tty
= 1; /* Always report if deleted more than one */
6955 if (VEC_length(breakpoint_p
, found
) == 1)
6956 printf_unfiltered (_("Deleted breakpoint "));
6958 printf_unfiltered (_("Deleted breakpoints "));
6960 breakpoints_changed ();
6962 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6965 printf_unfiltered ("%d ", b
->number
);
6966 delete_breakpoint (b
);
6969 putchar_unfiltered ('\n');
6972 /* Delete breakpoint in BS if they are `delete' breakpoints and
6973 all breakpoints that are marked for deletion, whether hit or not.
6974 This is called after any breakpoint is hit, or after errors. */
6977 breakpoint_auto_delete (bpstat bs
)
6979 struct breakpoint
*b
, *temp
;
6981 for (; bs
; bs
= bs
->next
)
6982 if (bs
->breakpoint_at
6983 && bs
->breakpoint_at
->owner
6984 && bs
->breakpoint_at
->owner
->disposition
== disp_del
6986 delete_breakpoint (bs
->breakpoint_at
->owner
);
6988 ALL_BREAKPOINTS_SAFE (b
, temp
)
6990 if (b
->disposition
== disp_del_at_next_stop
)
6991 delete_breakpoint (b
);
6996 update_global_location_list (void)
6998 struct breakpoint
*b
;
6999 struct bp_location
**next
= &bp_location_chain
;
7000 struct bp_location
*loc
;
7001 struct bp_location
*loc2
;
7002 struct gdb_exception e
;
7003 VEC(bp_location_p
) *old_locations
= NULL
;
7007 /* Store old locations for future reference. */
7008 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
7009 VEC_safe_push (bp_location_p
, old_locations
, loc
);
7011 bp_location_chain
= NULL
;
7014 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
7017 next
= &(loc
->global_next
);
7022 /* Identify bp_location instances that are no longer present in the new
7023 list, and therefore should be freed. Note that it's not necessary that
7024 those locations should be removed from inferior -- if there's another
7025 location at the same address (previously marked as duplicate),
7026 we don't need to remove/insert the location. */
7027 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
7029 /* Tells if 'loc' is found amoung the new locations. If not, we
7031 int found_object
= 0;
7032 /* Tells if the location should remain inserted in the target. */
7033 int keep_in_target
= 0;
7035 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7042 /* If this location is no longer present, and inserted, look if there's
7043 maybe a new location at the same address. If so, mark that one
7044 inserted, and don't remove this one. This is needed so that we
7045 don't have a time window where a breakpoint at certain location is not
7050 /* If the location is inserted now, we might have to remove it. */
7052 if (found_object
&& should_be_inserted (loc
))
7054 /* The location is still present in the location list, and still
7055 should be inserted. Don't do anything. */
7060 /* The location is either no longer present, or got disabled.
7061 See if there's another location at the same address, in which
7062 case we don't need to remove this one from the target. */
7063 if (breakpoint_address_is_meaningful (loc
->owner
))
7064 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7066 /* For the sake of should_insert_location. The
7067 call to check_duplicates will fix up this later. */
7068 loc2
->duplicate
= 0;
7069 if (should_be_inserted (loc2
)
7070 && loc2
!= loc
&& loc2
->address
== loc
->address
)
7073 loc2
->target_info
= loc
->target_info
;
7080 if (!keep_in_target
)
7082 if (remove_breakpoint (loc
, mark_uninserted
))
7084 /* This is just about all we can do. We could keep this
7085 location on the global list, and try to remove it next
7086 time, but there's no particular reason why we will
7089 Note that at this point, loc->owner is still valid,
7090 as delete_breakpoint frees the breakpoint only
7091 after calling us. */
7092 printf_filtered (_("warning: Error removing breakpoint %d\n"),
7093 loc
->owner
->number
);
7103 /* This location was removed from the targets. In non-stop mode,
7104 a race condition is possible where we've removed a breakpoint,
7105 but stop events for that breakpoint are already queued and will
7106 arrive later. To suppress spurious SIGTRAPs reported to user,
7107 we keep this breakpoint location for a bit, and will retire it
7108 after we see 3 * thread_count events.
7109 The theory here is that reporting of events should,
7110 "on the average", be fair, so after that many event we'll see
7111 events from all threads that have anything of interest, and no
7112 longer need to keep this breakpoint. This is just a
7113 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7114 which is usability issue, but not a correctness problem. */
7115 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7119 free_bp_location (loc
);
7125 check_duplicates (b
);
7128 if (always_inserted_mode
&& target_has_execution
)
7129 insert_breakpoint_locations ();
7133 breakpoint_retire_moribund (void)
7135 struct bp_location
*loc
;
7138 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7139 if (--(loc
->events_till_retirement
) == 0)
7141 free_bp_location (loc
);
7142 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7148 update_global_location_list_nothrow (void)
7150 struct gdb_exception e
;
7151 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7152 update_global_location_list ();
7155 /* Delete a breakpoint and clean up all traces of it in the data
7159 delete_breakpoint (struct breakpoint
*bpt
)
7161 struct breakpoint
*b
;
7163 struct bp_location
*loc
, *next
;
7165 gdb_assert (bpt
!= NULL
);
7167 /* Has this bp already been deleted? This can happen because multiple
7168 lists can hold pointers to bp's. bpstat lists are especial culprits.
7170 One example of this happening is a watchpoint's scope bp. When the
7171 scope bp triggers, we notice that the watchpoint is out of scope, and
7172 delete it. We also delete its scope bp. But the scope bp is marked
7173 "auto-deleting", and is already on a bpstat. That bpstat is then
7174 checked for auto-deleting bp's, which are deleted.
7176 A real solution to this problem might involve reference counts in bp's,
7177 and/or giving them pointers back to their referencing bpstat's, and
7178 teaching delete_breakpoint to only free a bp's storage when no more
7179 references were extent. A cheaper bandaid was chosen. */
7180 if (bpt
->type
== bp_none
)
7183 if (deprecated_delete_breakpoint_hook
)
7184 deprecated_delete_breakpoint_hook (bpt
);
7185 breakpoint_delete_event (bpt
->number
);
7187 if (breakpoint_chain
== bpt
)
7188 breakpoint_chain
= bpt
->next
;
7193 b
->next
= bpt
->next
;
7197 free_command_lines (&bpt
->commands
);
7198 if (bpt
->cond_string
!= NULL
)
7199 xfree (bpt
->cond_string
);
7200 if (bpt
->addr_string
!= NULL
)
7201 xfree (bpt
->addr_string
);
7202 if (bpt
->exp
!= NULL
)
7204 if (bpt
->exp_string
!= NULL
)
7205 xfree (bpt
->exp_string
);
7206 if (bpt
->val
!= NULL
)
7207 value_free (bpt
->val
);
7208 if (bpt
->source_file
!= NULL
)
7209 xfree (bpt
->source_file
);
7210 if (bpt
->dll_pathname
!= NULL
)
7211 xfree (bpt
->dll_pathname
);
7212 if (bpt
->triggered_dll_pathname
!= NULL
)
7213 xfree (bpt
->triggered_dll_pathname
);
7214 if (bpt
->exec_pathname
!= NULL
)
7215 xfree (bpt
->exec_pathname
);
7217 /* Be sure no bpstat's are pointing at it after it's been freed. */
7218 /* FIXME, how can we find all bpstat's?
7219 We just check stop_bpstat for now. Note that we cannot just
7220 remove bpstats pointing at bpt from the stop_bpstat list
7221 entirely, as breakpoint commands are associated with the bpstat;
7222 if we remove it here, then the later call to
7223 bpstat_do_actions (&stop_bpstat);
7224 in event-top.c won't do anything, and temporary breakpoints
7225 with commands won't work. */
7226 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
7227 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7229 bs
->breakpoint_at
= NULL
;
7231 /* bs->commands will be freed later. */
7234 /* Now that breakpoint is removed from breakpoint
7235 list, update the global location list. This
7236 will remove locations that used to belong to
7237 this breakpoint. Do this before freeing
7238 the breakpoint itself, since remove_breakpoint
7239 looks at location's owner. It might be better
7240 design to have location completely self-contained,
7241 but it's not the case now. */
7242 update_global_location_list ();
7245 /* On the chance that someone will soon try again to delete this same
7246 bp, we mark it as deleted before freeing its storage. */
7247 bpt
->type
= bp_none
;
7253 do_delete_breakpoint_cleanup (void *b
)
7255 delete_breakpoint (b
);
7259 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7261 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7265 delete_command (char *arg
, int from_tty
)
7267 struct breakpoint
*b
, *temp
;
7273 int breaks_to_delete
= 0;
7275 /* Delete all breakpoints if no argument.
7276 Do not delete internal or call-dummy breakpoints, these
7277 have to be deleted with an explicit breakpoint number argument. */
7280 if (b
->type
!= bp_call_dummy
&&
7281 b
->type
!= bp_shlib_event
&&
7282 b
->type
!= bp_thread_event
&&
7283 b
->type
!= bp_overlay_event
&&
7286 breaks_to_delete
= 1;
7291 /* Ask user only if there are some breakpoints to delete. */
7293 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7295 ALL_BREAKPOINTS_SAFE (b
, temp
)
7297 if (b
->type
!= bp_call_dummy
&&
7298 b
->type
!= bp_shlib_event
&&
7299 b
->type
!= bp_thread_event
&&
7300 b
->type
!= bp_overlay_event
&&
7302 delete_breakpoint (b
);
7307 map_breakpoint_numbers (arg
, delete_breakpoint
);
7311 all_locations_are_pending (struct bp_location
*loc
)
7313 for (; loc
; loc
= loc
->next
)
7314 if (!loc
->shlib_disabled
)
7319 /* Subroutine of update_breakpoint_locations to simplify it.
7320 Return non-zero if multiple fns in list LOC have the same name.
7321 Null names are ignored. */
7324 ambiguous_names_p (struct bp_location
*loc
)
7326 struct bp_location
*l
;
7327 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7328 (int (*) (const void *, const void *)) streq
,
7329 NULL
, xcalloc
, xfree
);
7331 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7334 const char *name
= l
->function_name
;
7336 /* Allow for some names to be NULL, ignore them. */
7340 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7342 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7357 update_breakpoint_locations (struct breakpoint
*b
,
7358 struct symtabs_and_lines sals
)
7362 struct bp_location
*existing_locations
= b
->loc
;
7364 /* If there's no new locations, and all existing locations
7365 are pending, don't do anything. This optimizes
7366 the common case where all locations are in the same
7367 shared library, that was unloaded. We'd like to
7368 retain the location, so that when the library
7369 is loaded again, we don't loose the enabled/disabled
7370 status of the individual locations. */
7371 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7376 for (i
= 0; i
< sals
.nelts
; ++i
)
7378 struct bp_location
*new_loc
=
7379 add_location_to_breakpoint (b
, b
->type
, &(sals
.sals
[i
]));
7381 /* Reparse conditions, they might contain references to the
7383 if (b
->cond_string
!= NULL
)
7385 struct gdb_exception e
;
7388 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7390 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7395 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7396 b
->number
, e
.message
);
7397 new_loc
->enabled
= 0;
7401 if (b
->source_file
!= NULL
)
7402 xfree (b
->source_file
);
7403 if (sals
.sals
[i
].symtab
== NULL
)
7404 b
->source_file
= NULL
;
7407 savestring (sals
.sals
[i
].symtab
->filename
,
7408 strlen (sals
.sals
[i
].symtab
->filename
));
7410 if (b
->line_number
== 0)
7411 b
->line_number
= sals
.sals
[i
].line
;
7414 /* If possible, carry over 'disable' status from existing breakpoints. */
7416 struct bp_location
*e
= existing_locations
;
7417 /* If there are multiple breakpoints with the same function name,
7418 e.g. for inline functions, comparing function names won't work.
7419 Instead compare pc addresses; this is just a heuristic as things
7420 may have moved, but in practice it gives the correct answer
7421 often enough until a better solution is found. */
7422 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7424 for (; e
; e
= e
->next
)
7426 if (!e
->enabled
&& e
->function_name
)
7428 struct bp_location
*l
= b
->loc
;
7429 if (have_ambiguous_names
)
7431 for (; l
; l
= l
->next
)
7432 if (e
->address
== l
->address
)
7440 for (; l
; l
= l
->next
)
7441 if (l
->function_name
7442 && strcmp (e
->function_name
, l
->function_name
) == 0)
7452 update_global_location_list ();
7456 /* Reset a breakpoint given it's struct breakpoint * BINT.
7457 The value we return ends up being the return value from catch_errors.
7458 Unused in this case. */
7461 breakpoint_re_set_one (void *bint
)
7463 /* get past catch_errs */
7464 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7468 int *not_found_ptr
= ¬_found
;
7469 struct symtabs_and_lines sals
= {};
7470 struct symtabs_and_lines expanded
;
7472 enum enable_state save_enable
;
7473 struct gdb_exception e
;
7479 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7483 case bp_hardware_breakpoint
:
7485 case bp_catch_unload
:
7486 if (b
->addr_string
== NULL
)
7488 /* Anything without a string can't be re-set. */
7489 delete_breakpoint (b
);
7493 set_language (b
->language
);
7494 input_radix
= b
->input_radix
;
7496 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7498 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7503 int not_found_and_ok
= 0;
7504 /* For pending breakpoints, it's expected that parsing
7505 will fail until the right shared library is loaded.
7506 User has already told to create pending breakpoints and
7507 don't need extra messages. If breakpoint is in bp_shlib_disabled
7508 state, then user already saw the message about that breakpoint
7509 being disabled, and don't want to see more errors. */
7511 && (b
->condition_not_parsed
7512 || (b
->loc
&& b
->loc
->shlib_disabled
)
7513 || b
->enable_state
== bp_disabled
))
7514 not_found_and_ok
= 1;
7516 if (!not_found_and_ok
)
7518 /* We surely don't want to warn about the same breakpoint
7519 10 times. One solution, implemented here, is disable
7520 the breakpoint on error. Another solution would be to
7521 have separate 'warning emitted' flag. Since this
7522 happens only when a binary has changed, I don't know
7523 which approach is better. */
7524 b
->enable_state
= bp_disabled
;
7525 throw_exception (e
);
7532 gdb_assert (sals
.nelts
== 1);
7533 resolve_sal_pc (&sals
.sals
[0]);
7534 if (b
->condition_not_parsed
&& s
&& s
[0])
7536 char *cond_string
= 0;
7538 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7539 &cond_string
, &thread
);
7541 b
->cond_string
= cond_string
;
7543 b
->condition_not_parsed
= 0;
7545 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7546 update_breakpoint_locations (b
, expanded
);
7552 case bp_hardware_watchpoint
:
7553 case bp_read_watchpoint
:
7554 case bp_access_watchpoint
:
7555 /* Watchpoint can be either on expression using entirely global variables,
7556 or it can be on local variables.
7558 Watchpoints of the first kind are never auto-deleted, and even persist
7559 across program restarts. Since they can use variables from shared
7560 libraries, we need to reparse expression as libraries are loaded
7563 Watchpoints on local variables can also change meaning as result
7564 of solib event. For example, if a watchpoint uses both a local and
7565 a global variables in expression, it's a local watchpoint, but
7566 unloading of a shared library will make the expression invalid.
7567 This is not a very common use case, but we still re-evaluate
7568 expression, to avoid surprises to the user.
7570 Note that for local watchpoints, we re-evaluate it only if
7571 watchpoints frame id is still valid. If it's not, it means
7572 the watchpoint is out of scope and will be deleted soon. In fact,
7573 I'm not sure we'll ever be called in this case.
7575 If a local watchpoint's frame id is still valid, then
7576 b->exp_valid_block is likewise valid, and we can safely use it.
7578 Don't do anything about disabled watchpoints, since they will
7579 be reevaluated again when enabled. */
7580 update_watchpoint (b
, 1 /* reparse */);
7582 /* We needn't really do anything to reset these, since the mask
7583 that requests them is unaffected by e.g., new libraries being
7586 case bp_catch_vfork
:
7591 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7593 /* Delete overlay event breakpoints; they will be reset later by
7594 breakpoint_re_set. */
7595 case bp_overlay_event
:
7596 delete_breakpoint (b
);
7599 /* This breakpoint is special, it's set up when the inferior
7600 starts and we really don't want to touch it. */
7601 case bp_shlib_event
:
7603 /* Like bp_shlib_event, this breakpoint type is special.
7604 Once it is set up, we do not want to touch it. */
7605 case bp_thread_event
:
7607 /* Keep temporary breakpoints, which can be encountered when we step
7608 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7609 Otherwise these should have been blown away via the cleanup chain
7610 or by breakpoint_init_inferior when we rerun the executable. */
7613 case bp_watchpoint_scope
:
7615 case bp_step_resume
:
7617 case bp_longjmp_resume
:
7624 /* Re-set all breakpoints after symbols have been re-loaded. */
7626 breakpoint_re_set (void)
7628 struct breakpoint
*b
, *temp
;
7629 enum language save_language
;
7630 int save_input_radix
;
7632 save_language
= current_language
->la_language
;
7633 save_input_radix
= input_radix
;
7634 ALL_BREAKPOINTS_SAFE (b
, temp
)
7636 /* Format possible error msg */
7637 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7639 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7640 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7641 do_cleanups (cleanups
);
7643 set_language (save_language
);
7644 input_radix
= save_input_radix
;
7646 create_overlay_event_breakpoint ("_ovly_debug_event");
7649 /* Reset the thread number of this breakpoint:
7651 - If the breakpoint is for all threads, leave it as-is.
7652 - Else, reset it to the current thread for inferior_ptid. */
7654 breakpoint_re_set_thread (struct breakpoint
*b
)
7656 if (b
->thread
!= -1)
7658 if (in_thread_list (inferior_ptid
))
7659 b
->thread
= pid_to_thread_id (inferior_ptid
);
7663 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7664 If from_tty is nonzero, it prints a message to that effect,
7665 which ends with a period (no newline). */
7668 set_ignore_count (int bptnum
, int count
, int from_tty
)
7670 struct breakpoint
*b
;
7676 if (b
->number
== bptnum
)
7678 b
->ignore_count
= count
;
7682 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7684 else if (count
== 1)
7685 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7688 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7691 breakpoints_changed ();
7692 breakpoint_modify_event (b
->number
);
7696 error (_("No breakpoint number %d."), bptnum
);
7699 /* Clear the ignore counts of all breakpoints. */
7701 breakpoint_clear_ignore_counts (void)
7703 struct breakpoint
*b
;
7706 b
->ignore_count
= 0;
7709 /* Command to set ignore-count of breakpoint N to COUNT. */
7712 ignore_command (char *args
, int from_tty
)
7718 error_no_arg (_("a breakpoint number"));
7720 num
= get_number (&p
);
7722 error (_("bad breakpoint number: '%s'"), args
);
7724 error (_("Second argument (specified ignore-count) is missing."));
7726 set_ignore_count (num
,
7727 longest_to_int (value_as_long (parse_and_eval (p
))),
7730 printf_filtered ("\n");
7733 /* Call FUNCTION on each of the breakpoints
7734 whose numbers are given in ARGS. */
7737 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7742 struct breakpoint
*b
, *tmp
;
7746 error_no_arg (_("one or more breakpoint numbers"));
7753 num
= get_number_or_range (&p1
);
7756 warning (_("bad breakpoint number at or near '%s'"), p
);
7760 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7761 if (b
->number
== num
)
7763 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7766 if (related_breakpoint
)
7767 function (related_breakpoint
);
7771 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7777 static struct bp_location
*
7778 find_location_by_number (char *number
)
7780 char *dot
= strchr (number
, '.');
7784 struct breakpoint
*b
;
7785 struct bp_location
*loc
;
7790 bp_num
= get_number_or_range (&p1
);
7792 error (_("Bad breakpoint number '%s'"), number
);
7795 if (b
->number
== bp_num
)
7800 if (!b
|| b
->number
!= bp_num
)
7801 error (_("Bad breakpoint number '%s'"), number
);
7804 loc_num
= get_number_or_range (&p1
);
7806 error (_("Bad breakpoint location number '%s'"), number
);
7810 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7813 error (_("Bad breakpoint location number '%s'"), dot
+1);
7819 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7820 If from_tty is nonzero, it prints a message to that effect,
7821 which ends with a period (no newline). */
7824 disable_breakpoint (struct breakpoint
*bpt
)
7826 /* Never disable a watchpoint scope breakpoint; we want to
7827 hit them when we leave scope so we can delete both the
7828 watchpoint and its scope breakpoint at that time. */
7829 if (bpt
->type
== bp_watchpoint_scope
)
7832 /* You can't disable permanent breakpoints. */
7833 if (bpt
->enable_state
== bp_permanent
)
7836 bpt
->enable_state
= bp_disabled
;
7838 update_global_location_list ();
7840 if (deprecated_modify_breakpoint_hook
)
7841 deprecated_modify_breakpoint_hook (bpt
);
7842 breakpoint_modify_event (bpt
->number
);
7846 disable_command (char *args
, int from_tty
)
7848 struct breakpoint
*bpt
;
7850 ALL_BREAKPOINTS (bpt
)
7854 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7859 case bp_catch_unload
:
7861 case bp_catch_vfork
:
7863 case bp_hardware_breakpoint
:
7865 case bp_hardware_watchpoint
:
7866 case bp_read_watchpoint
:
7867 case bp_access_watchpoint
:
7868 disable_breakpoint (bpt
);
7872 else if (strchr (args
, '.'))
7874 struct bp_location
*loc
= find_location_by_number (args
);
7877 update_global_location_list ();
7880 map_breakpoint_numbers (args
, disable_breakpoint
);
7884 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7886 int target_resources_ok
, other_type_used
;
7889 if (bpt
->type
== bp_hardware_breakpoint
)
7892 i
= hw_breakpoint_used_count ();
7893 target_resources_ok
=
7894 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7896 if (target_resources_ok
== 0)
7897 error (_("No hardware breakpoint support in the target."));
7898 else if (target_resources_ok
< 0)
7899 error (_("Hardware breakpoints used exceeds limit."));
7902 if (bpt
->type
== bp_watchpoint
||
7903 bpt
->type
== bp_hardware_watchpoint
||
7904 bpt
->type
== bp_read_watchpoint
||
7905 bpt
->type
== bp_access_watchpoint
)
7907 struct frame_id saved_frame_id
;
7909 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7910 if (bpt
->exp_valid_block
!= NULL
)
7912 struct frame_info
*fr
=
7913 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7916 printf_filtered (_("\
7917 Cannot enable watchpoint %d because the block in which its expression\n\
7918 is valid is not currently in scope.\n"), bpt
->number
);
7925 value_free (bpt
->val
);
7926 mark
= value_mark ();
7927 fetch_watchpoint_value (bpt
->exp
, &bpt
->val
, NULL
, NULL
);
7929 release_value (bpt
->val
);
7932 if (bpt
->type
== bp_hardware_watchpoint
||
7933 bpt
->type
== bp_read_watchpoint
||
7934 bpt
->type
== bp_access_watchpoint
)
7936 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7937 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7939 /* Hack around 'unused var' error for some targets here */
7940 (void) mem_cnt
, (void) i
;
7941 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7942 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7943 /* we can consider of type is bp_hardware_watchpoint, convert to
7944 bp_watchpoint in the following condition */
7945 if (target_resources_ok
< 0)
7947 printf_filtered (_("\
7948 Cannot enable watchpoint %d because target watch resources\n\
7949 have been allocated for other watchpoints.\n"), bpt
->number
);
7950 value_free_to_mark (mark
);
7955 select_frame (frame_find_by_id (saved_frame_id
));
7956 value_free_to_mark (mark
);
7959 if (bpt
->enable_state
!= bp_permanent
)
7960 bpt
->enable_state
= bp_enabled
;
7961 bpt
->disposition
= disposition
;
7962 update_global_location_list ();
7963 breakpoints_changed ();
7965 if (deprecated_modify_breakpoint_hook
)
7966 deprecated_modify_breakpoint_hook (bpt
);
7967 breakpoint_modify_event (bpt
->number
);
7972 enable_breakpoint (struct breakpoint
*bpt
)
7974 do_enable_breakpoint (bpt
, bpt
->disposition
);
7977 /* The enable command enables the specified breakpoints (or all defined
7978 breakpoints) so they once again become (or continue to be) effective
7979 in stopping the inferior. */
7982 enable_command (char *args
, int from_tty
)
7984 struct breakpoint
*bpt
;
7986 ALL_BREAKPOINTS (bpt
)
7990 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7995 case bp_catch_unload
:
7997 case bp_catch_vfork
:
7999 case bp_hardware_breakpoint
:
8001 case bp_hardware_watchpoint
:
8002 case bp_read_watchpoint
:
8003 case bp_access_watchpoint
:
8004 enable_breakpoint (bpt
);
8008 else if (strchr (args
, '.'))
8010 struct bp_location
*loc
= find_location_by_number (args
);
8013 update_global_location_list ();
8016 map_breakpoint_numbers (args
, enable_breakpoint
);
8020 enable_once_breakpoint (struct breakpoint
*bpt
)
8022 do_enable_breakpoint (bpt
, disp_disable
);
8026 enable_once_command (char *args
, int from_tty
)
8028 map_breakpoint_numbers (args
, enable_once_breakpoint
);
8032 enable_delete_breakpoint (struct breakpoint
*bpt
)
8034 do_enable_breakpoint (bpt
, disp_del
);
8038 enable_delete_command (char *args
, int from_tty
)
8040 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
8044 set_breakpoint_cmd (char *args
, int from_tty
)
8049 show_breakpoint_cmd (char *args
, int from_tty
)
8053 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
8055 struct symtabs_and_lines
8056 decode_line_spec_1 (char *string
, int funfirstline
)
8058 struct symtabs_and_lines sals
;
8060 error (_("Empty line specification."));
8061 if (default_breakpoint_valid
)
8062 sals
= decode_line_1 (&string
, funfirstline
,
8063 default_breakpoint_symtab
,
8064 default_breakpoint_line
,
8065 (char ***) NULL
, NULL
);
8067 sals
= decode_line_1 (&string
, funfirstline
,
8068 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
8070 error (_("Junk at end of line specification: %s"), string
);
8074 /* Create and insert a raw software breakpoint at PC. Return an
8075 identifier, which should be used to remove the breakpoint later.
8076 In general, places which call this should be using something on the
8077 breakpoint chain instead; this function should be eliminated
8081 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
8083 struct bp_target_info
*bp_tgt
;
8085 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
8086 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
8088 bp_tgt
->placed_address
= pc
;
8089 if (target_insert_breakpoint (bp_tgt
) != 0)
8091 /* Could not insert the breakpoint. */
8099 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
8102 deprecated_remove_raw_breakpoint (void *bp
)
8104 struct bp_target_info
*bp_tgt
= bp
;
8107 ret
= target_remove_breakpoint (bp_tgt
);
8113 /* One (or perhaps two) breakpoints used for software single stepping. */
8115 static void *single_step_breakpoints
[2];
8117 /* Create and insert a breakpoint for software single step. */
8120 insert_single_step_breakpoint (CORE_ADDR next_pc
)
8124 if (single_step_breakpoints
[0] == NULL
)
8125 bpt_p
= &single_step_breakpoints
[0];
8128 gdb_assert (single_step_breakpoints
[1] == NULL
);
8129 bpt_p
= &single_step_breakpoints
[1];
8132 /* NOTE drow/2006-04-11: A future improvement to this function would be
8133 to only create the breakpoints once, and actually put them on the
8134 breakpoint chain. That would let us use set_raw_breakpoint. We could
8135 adjust the addresses each time they were needed. Doing this requires
8136 corresponding changes elsewhere where single step breakpoints are
8137 handled, however. So, for now, we use this. */
8139 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
8141 error (_("Could not insert single-step breakpoint at 0x%s"),
8142 paddr_nz (next_pc
));
8145 /* Remove and delete any breakpoints used for software single step. */
8148 remove_single_step_breakpoints (void)
8150 gdb_assert (single_step_breakpoints
[0] != NULL
);
8152 /* See insert_single_step_breakpoint for more about this deprecated
8154 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8155 single_step_breakpoints
[0] = NULL
;
8157 if (single_step_breakpoints
[1] != NULL
)
8159 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8160 single_step_breakpoints
[1] = NULL
;
8164 /* Check whether a software single-step breakpoint is inserted at PC. */
8167 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8171 for (i
= 0; i
< 2; i
++)
8173 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8174 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8181 int breakpoints_always_inserted_mode (void)
8183 return always_inserted_mode
;
8187 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8188 It is defined as a macro to prevent duplication.
8189 COMMAND should be a string constant containing the name of the command. */
8190 #define BREAK_ARGS_HELP(command) \
8191 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8192 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8193 If a line number is specified, break at start of code for that line.\n\
8194 If a function is specified, break at start of code for that function.\n\
8195 If an address is specified, break at that exact address.\n\
8196 With no LOCATION, uses current execution address of selected stack frame.\n\
8197 This is useful for breaking on return to a stack frame.\n\
8199 THREADNUM is the number from \"info threads\".\n\
8200 CONDITION is a boolean expression.\n\
8202 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8204 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8207 _initialize_breakpoint (void)
8209 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8210 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8211 struct cmd_list_element
*c
;
8213 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8215 breakpoint_chain
= 0;
8216 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8217 before a breakpoint is set. */
8218 breakpoint_count
= 0;
8220 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8221 Set ignore-count of breakpoint number N to COUNT.\n\
8222 Usage is `ignore N COUNT'."));
8224 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8226 add_com ("commands", class_breakpoint
, commands_command
, _("\
8227 Set commands to be executed when a breakpoint is hit.\n\
8228 Give breakpoint number as argument after \"commands\".\n\
8229 With no argument, the targeted breakpoint is the last one set.\n\
8230 The commands themselves follow starting on the next line.\n\
8231 Type a line containing \"end\" to indicate the end of them.\n\
8232 Give \"silent\" as the first line to make the breakpoint silent;\n\
8233 then no output is printed when it is hit, except what the commands print."));
8235 add_com ("condition", class_breakpoint
, condition_command
, _("\
8236 Specify breakpoint number N to break only if COND is true.\n\
8237 Usage is `condition N COND', where N is an integer and COND is an\n\
8238 expression to be evaluated whenever breakpoint N is reached."));
8240 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8241 Set a temporary breakpoint.\n\
8242 Like \"break\" except the breakpoint is only temporary,\n\
8243 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8244 by using \"enable delete\" on the breakpoint number.\n\
8246 BREAK_ARGS_HELP ("tbreak")));
8247 set_cmd_completer (c
, location_completer
);
8249 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8250 Set a hardware assisted breakpoint.\n\
8251 Like \"break\" except the breakpoint requires hardware support,\n\
8252 some target hardware may not have this support.\n\
8254 BREAK_ARGS_HELP ("hbreak")));
8255 set_cmd_completer (c
, location_completer
);
8257 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8258 Set a temporary hardware assisted breakpoint.\n\
8259 Like \"hbreak\" except the breakpoint is only temporary,\n\
8260 so it will be deleted when hit.\n\
8262 BREAK_ARGS_HELP ("thbreak")));
8263 set_cmd_completer (c
, location_completer
);
8265 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8266 Enable some breakpoints.\n\
8267 Give breakpoint numbers (separated by spaces) as arguments.\n\
8268 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8269 This is used to cancel the effect of the \"disable\" command.\n\
8270 With a subcommand you can enable temporarily."),
8271 &enablelist
, "enable ", 1, &cmdlist
);
8273 add_com ("ab", class_breakpoint
, enable_command
, _("\
8274 Enable some breakpoints.\n\
8275 Give breakpoint numbers (separated by spaces) as arguments.\n\
8276 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8277 This is used to cancel the effect of the \"disable\" command.\n\
8278 With a subcommand you can enable temporarily."));
8280 add_com_alias ("en", "enable", class_breakpoint
, 1);
8282 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8283 Enable some breakpoints.\n\
8284 Give breakpoint numbers (separated by spaces) as arguments.\n\
8285 This is used to cancel the effect of the \"disable\" command.\n\
8286 May be abbreviated to simply \"enable\".\n"),
8287 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8289 add_cmd ("once", no_class
, enable_once_command
, _("\
8290 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8291 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8294 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8295 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8296 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8299 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8300 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8301 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8304 add_cmd ("once", no_class
, enable_once_command
, _("\
8305 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8306 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8309 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8310 Disable some breakpoints.\n\
8311 Arguments are breakpoint numbers with spaces in between.\n\
8312 To disable all breakpoints, give no argument.\n\
8313 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8314 &disablelist
, "disable ", 1, &cmdlist
);
8315 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8316 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8318 add_com ("sb", class_breakpoint
, disable_command
, _("\
8319 Disable some breakpoints.\n\
8320 Arguments are breakpoint numbers with spaces in between.\n\
8321 To disable all breakpoints, give no argument.\n\
8322 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8324 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8325 Disable some breakpoints.\n\
8326 Arguments are breakpoint numbers with spaces in between.\n\
8327 To disable all breakpoints, give no argument.\n\
8328 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8329 This command may be abbreviated \"disable\"."),
8332 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8333 Delete some breakpoints or auto-display expressions.\n\
8334 Arguments are breakpoint numbers with spaces in between.\n\
8335 To delete all breakpoints, give no argument.\n\
8337 Also a prefix command for deletion of other GDB objects.\n\
8338 The \"unset\" command is also an alias for \"delete\"."),
8339 &deletelist
, "delete ", 1, &cmdlist
);
8340 add_com_alias ("d", "delete", class_breakpoint
, 1);
8341 add_com_alias ("del", "delete", class_breakpoint
, 1);
8343 add_com ("db", class_breakpoint
, delete_command
, _("\
8344 Delete some breakpoints.\n\
8345 Arguments are breakpoint numbers with spaces in between.\n\
8346 To delete all breakpoints, give no argument.\n"));
8348 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8349 Delete some breakpoints or auto-display expressions.\n\
8350 Arguments are breakpoint numbers with spaces in between.\n\
8351 To delete all breakpoints, give no argument.\n\
8352 This command may be abbreviated \"delete\"."),
8355 add_com ("clear", class_breakpoint
, clear_command
, _("\
8356 Clear breakpoint at specified line or function.\n\
8357 Argument may be line number, function name, or \"*\" and an address.\n\
8358 If line number is specified, all breakpoints in that line are cleared.\n\
8359 If function is specified, breakpoints at beginning of function are cleared.\n\
8360 If an address is specified, breakpoints at that address are cleared.\n\
8362 With no argument, clears all breakpoints in the line that the selected frame\n\
8365 See also the \"delete\" command which clears breakpoints by number."));
8367 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8368 Set breakpoint at specified line or function.\n"
8369 BREAK_ARGS_HELP ("break")));
8370 set_cmd_completer (c
, location_completer
);
8372 add_com_alias ("b", "break", class_run
, 1);
8373 add_com_alias ("br", "break", class_run
, 1);
8374 add_com_alias ("bre", "break", class_run
, 1);
8375 add_com_alias ("brea", "break", class_run
, 1);
8379 add_com_alias ("ba", "break", class_breakpoint
, 1);
8380 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8385 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8386 Break in function/address or break at a line in the current file."),
8387 &stoplist
, "stop ", 1, &cmdlist
);
8388 add_cmd ("in", class_breakpoint
, stopin_command
,
8389 _("Break in function or address."), &stoplist
);
8390 add_cmd ("at", class_breakpoint
, stopat_command
,
8391 _("Break at a line in the current file."), &stoplist
);
8392 add_com ("status", class_info
, breakpoints_info
, _("\
8393 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8394 The \"Type\" column indicates one of:\n\
8395 \tbreakpoint - normal breakpoint\n\
8396 \twatchpoint - watchpoint\n\
8397 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8398 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8399 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8400 address and file/line number respectively.\n\
8402 Convenience variable \"$_\" and default examine address for \"x\"\n\
8403 are set to the address of the last breakpoint listed unless the command\n\
8404 is prefixed with \"server \".\n\n\
8405 Convenience variable \"$bpnum\" contains the number of the last\n\
8409 add_info ("breakpoints", breakpoints_info
, _("\
8410 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8411 The \"Type\" column indicates one of:\n\
8412 \tbreakpoint - normal breakpoint\n\
8413 \twatchpoint - watchpoint\n\
8414 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8415 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8416 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8417 address and file/line number respectively.\n\
8419 Convenience variable \"$_\" and default examine address for \"x\"\n\
8420 are set to the address of the last breakpoint listed unless the command\n\
8421 is prefixed with \"server \".\n\n\
8422 Convenience variable \"$bpnum\" contains the number of the last\n\
8426 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8427 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8428 The \"Type\" column indicates one of:\n\
8429 \tbreakpoint - normal breakpoint\n\
8430 \twatchpoint - watchpoint\n\
8431 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8432 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8433 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8434 address and file/line number respectively.\n\
8436 Convenience variable \"$_\" and default examine address for \"x\"\n\
8437 are set to the address of the last breakpoint listed unless the command\n\
8438 is prefixed with \"server \".\n\n\
8439 Convenience variable \"$bpnum\" contains the number of the last\n\
8442 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8443 Status of all breakpoints, or breakpoint number NUMBER.\n\
8444 The \"Type\" column indicates one of:\n\
8445 \tbreakpoint - normal breakpoint\n\
8446 \twatchpoint - watchpoint\n\
8447 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8448 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8449 \tuntil - internal breakpoint used by the \"until\" command\n\
8450 \tfinish - internal breakpoint used by the \"finish\" command\n\
8451 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8452 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8453 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8454 address and file/line number respectively.\n\
8456 Convenience variable \"$_\" and default examine address for \"x\"\n\
8457 are set to the address of the last breakpoint listed unless the command\n\
8458 is prefixed with \"server \".\n\n\
8459 Convenience variable \"$bpnum\" contains the number of the last\n\
8461 &maintenanceinfolist
);
8463 add_com ("catch", class_breakpoint
, catch_command
, _("\
8464 Set catchpoints to catch events.\n\
8465 Raised signals may be caught:\n\
8466 \tcatch signal - all signals\n\
8467 \tcatch signal <signame> - a particular signal\n\
8468 Raised exceptions may be caught:\n\
8469 \tcatch throw - all exceptions, when thrown\n\
8470 \tcatch throw <exceptname> - a particular exception, when thrown\n\
8471 \tcatch catch - all exceptions, when caught\n\
8472 \tcatch catch <exceptname> - a particular exception, when caught\n\
8473 Thread or process events may be caught:\n\
8474 \tcatch thread_start - any threads, just after creation\n\
8475 \tcatch thread_exit - any threads, just before expiration\n\
8476 \tcatch thread_join - any threads, just after joins\n\
8477 Process events may be caught:\n\
8478 \tcatch start - any processes, just after creation\n\
8479 \tcatch exit - any processes, just before expiration\n\
8480 \tcatch fork - calls to fork()\n\
8481 \tcatch vfork - calls to vfork()\n\
8482 \tcatch exec - calls to exec()\n\
8483 Dynamically-linked library events may be caught:\n\
8484 \tcatch load - loads of any library\n\
8485 \tcatch load <libname> - loads of a particular library\n\
8486 \tcatch unload - unloads of any library\n\
8487 \tcatch unload <libname> - unloads of a particular library\n\
8488 The act of your program's execution stopping may also be caught:\n\
8490 C++ exceptions may be caught:\n\
8491 \tcatch throw - all exceptions, when thrown\n\
8492 \tcatch catch - all exceptions, when caught\n\
8493 Ada exceptions may be caught:\n\
8494 \tcatch exception - all exceptions, when raised\n\
8495 \tcatch exception <name> - a particular exception, when raised\n\
8496 \tcatch exception unhandled - all unhandled exceptions, when raised\n\
8497 \tcatch assert - all failed assertions, when raised\n\
8499 Do \"help set follow-fork-mode\" for info on debugging your program\n\
8500 after a fork or vfork is caught.\n\n\
8501 Do \"help breakpoints\" for info on other commands dealing with breakpoints."));
8503 add_com ("tcatch", class_breakpoint
, tcatch_command
, _("\
8504 Set temporary catchpoints to catch events.\n\
8505 Args like \"catch\" command.\n\
8506 Like \"catch\" except the catchpoint is only temporary,\n\
8507 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
8508 by using \"enable delete\" on the catchpoint number."));
8510 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8511 Set a watchpoint for an expression.\n\
8512 A watchpoint stops execution of your program whenever the value of\n\
8513 an expression changes."));
8514 set_cmd_completer (c
, expression_completer
);
8516 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8517 Set a read watchpoint for an expression.\n\
8518 A watchpoint stops execution of your program whenever the value of\n\
8519 an expression is read."));
8520 set_cmd_completer (c
, expression_completer
);
8522 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8523 Set a watchpoint for an expression.\n\
8524 A watchpoint stops execution of your program whenever the value of\n\
8525 an expression is either read or written."));
8526 set_cmd_completer (c
, expression_completer
);
8528 add_info ("watchpoints", breakpoints_info
,
8529 _("Synonym for ``info breakpoints''."));
8532 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8533 respond to changes - contrary to the description. */
8534 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8535 &can_use_hw_watchpoints
, _("\
8536 Set debugger's willingness to use watchpoint hardware."), _("\
8537 Show debugger's willingness to use watchpoint hardware."), _("\
8538 If zero, gdb will not use hardware for new watchpoints, even if\n\
8539 such is available. (However, any hardware watchpoints that were\n\
8540 created before setting this to nonzero, will continue to use watchpoint\n\
8543 show_can_use_hw_watchpoints
,
8544 &setlist
, &showlist
);
8546 can_use_hw_watchpoints
= 1;
8548 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8549 Breakpoint specific settings\n\
8550 Configure various breakpoint-specific variables such as\n\
8551 pending breakpoint behavior"),
8552 &breakpoint_set_cmdlist
, "set breakpoint ",
8553 0/*allow-unknown*/, &setlist
);
8554 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8555 Breakpoint specific settings\n\
8556 Configure various breakpoint-specific variables such as\n\
8557 pending breakpoint behavior"),
8558 &breakpoint_show_cmdlist
, "show breakpoint ",
8559 0/*allow-unknown*/, &showlist
);
8561 add_setshow_auto_boolean_cmd ("pending", no_class
,
8562 &pending_break_support
, _("\
8563 Set debugger's behavior regarding pending breakpoints."), _("\
8564 Show debugger's behavior regarding pending breakpoints."), _("\
8565 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8566 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8567 an error. If auto, an unrecognized breakpoint location results in a\n\
8568 user-query to see if a pending breakpoint should be created."),
8570 show_pending_break_support
,
8571 &breakpoint_set_cmdlist
,
8572 &breakpoint_show_cmdlist
);
8574 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8576 add_setshow_boolean_cmd ("auto-hw", no_class
,
8577 &automatic_hardware_breakpoints
, _("\
8578 Set automatic usage of hardware breakpoints."), _("\
8579 Show automatic usage of hardware breakpoints."), _("\
8580 If set, the debugger will automatically use hardware breakpoints for\n\
8581 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8582 a warning will be emitted for such breakpoints."),
8584 show_automatic_hardware_breakpoints
,
8585 &breakpoint_set_cmdlist
,
8586 &breakpoint_show_cmdlist
);
8588 add_setshow_boolean_cmd ("always-inserted", class_support
,
8589 &always_inserted_mode
, _("\
8590 Set mode for inserting breakpoints."), _("\
8591 Show mode for inserting breakpoints."), _("\
8592 When this mode is off (which is the default), breakpoints are inserted in\n\
8593 inferior when it is resumed, and removed when execution stops. When this\n\
8594 mode is on, breakpoints are inserted immediately and removed only when\n\
8595 the user deletes the breakpoint."),
8597 &show_always_inserted_mode
,
8598 &breakpoint_set_cmdlist
,
8599 &breakpoint_show_cmdlist
);
8601 automatic_hardware_breakpoints
= 1;