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
);
67 static void catch_command_1 (char *, int, int);
69 static void enable_delete_command (char *, int);
71 static void enable_delete_breakpoint (struct breakpoint
*);
73 static void enable_once_command (char *, int);
75 static void enable_once_breakpoint (struct breakpoint
*);
77 static void disable_command (char *, int);
79 static void enable_command (char *, int);
81 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
83 static void ignore_command (char *, int);
85 static int breakpoint_re_set_one (void *);
87 static void clear_command (char *, int);
89 static void catch_command (char *, int);
91 static void watch_command (char *, int);
93 static int can_use_hardware_watchpoint (struct value
*);
95 static void break_command_1 (char *, int, int);
97 static void mention (struct breakpoint
*);
99 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
101 static void check_duplicates (struct breakpoint
*);
103 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
105 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
108 static void describe_other_breakpoints (CORE_ADDR
, asection
*, int);
110 static void breakpoints_info (char *, int);
112 static void breakpoint_1 (int, int);
114 static bpstat
bpstat_alloc (const struct bp_location
*, bpstat
);
116 static int breakpoint_cond_eval (void *);
118 static void cleanup_executing_breakpoints (void *);
120 static void commands_command (char *, int);
122 static void condition_command (char *, int);
124 static int get_number_trailer (char **, int);
126 void set_breakpoint_count (int);
135 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
137 static enum print_stop_action
print_it_typical (bpstat
);
139 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
143 enum exception_event_kind kind
;
146 args_for_catchpoint_enable
;
148 static int watchpoint_check (void *);
150 static void maintenance_info_breakpoints (char *, int);
152 static void create_longjmp_breakpoint (char *);
154 static void create_overlay_event_breakpoint (char *);
156 static int hw_breakpoint_used_count (void);
158 static int hw_watchpoint_used_count (enum bptype
, int *);
160 static void hbreak_command (char *, int);
162 static void thbreak_command (char *, int);
164 static void watch_command_1 (char *, int, int);
166 static void rwatch_command (char *, int);
168 static void awatch_command (char *, int);
170 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
172 static void create_fork_vfork_event_catchpoint (int tempflag
,
174 enum bptype bp_kind
);
176 static void stop_command (char *arg
, int from_tty
);
178 static void stopin_command (char *arg
, int from_tty
);
180 static void stopat_command (char *arg
, int from_tty
);
182 static char *ep_find_event_name_end (char *arg
);
184 static char *ep_parse_optional_if_clause (char **arg
);
186 static char *ep_parse_optional_filename (char **arg
);
188 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
189 enum exception_event_kind ex_event
,
190 struct symtab_and_line
*sal
);
192 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
193 char *arg
, int tempflag
, int from_tty
);
195 static void tcatch_command (char *arg
, int from_tty
);
197 static void ep_skip_leading_whitespace (char **s
);
199 static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc
);
201 static void free_bp_location (struct bp_location
*loc
);
203 static void mark_breakpoints_out (void);
205 static struct bp_location
*
206 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
);
209 unlink_locations_from_global_list (struct breakpoint
*bpt
);
212 is_hardware_watchpoint (struct breakpoint
*bpt
);
214 /* Prototypes for exported functions. */
216 /* If FALSE, gdb will not use hardware support for watchpoints, even
217 if such is available. */
218 static int can_use_hw_watchpoints
;
221 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
222 struct cmd_list_element
*c
,
225 fprintf_filtered (file
, _("\
226 Debugger's willingness to use watchpoint hardware is %s.\n"),
230 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
231 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
232 for unrecognized breakpoint locations.
233 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
234 static enum auto_boolean pending_break_support
;
236 show_pending_break_support (struct ui_file
*file
, int from_tty
,
237 struct cmd_list_element
*c
,
240 fprintf_filtered (file
, _("\
241 Debugger's behavior regarding pending breakpoints is %s.\n"),
245 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
246 set with "break" but falling in read-only memory.
247 If 0, gdb will warn about such breakpoints, but won't automatically
248 use hardware breakpoints. */
249 static int automatic_hardware_breakpoints
;
251 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
252 struct cmd_list_element
*c
,
255 fprintf_filtered (file
, _("\
256 Automatic usage of hardware breakpoints is %s.\n"),
261 void _initialize_breakpoint (void);
263 extern int addressprint
; /* Print machine addresses? */
265 /* Are we executing breakpoint commands? */
266 static int executing_breakpoint_commands
;
268 /* Are overlay event breakpoints enabled? */
269 static int overlay_events_enabled
;
271 /* Walk the following statement or block through all breakpoints.
272 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
275 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
277 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
278 for (B = breakpoint_chain; \
279 B ? (TMP=B->next, 1): 0; \
282 /* Similar iterators for the low-level breakpoints. */
284 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->global_next)
286 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
287 for (B = bp_location_chain; \
288 B ? (TMP=B->global_next, 1): 0; \
291 /* True if breakpoint hit counts should be displayed in breakpoint info. */
293 int show_breakpoint_hit_counts
= 1;
295 /* Chains of all breakpoints defined. */
297 struct breakpoint
*breakpoint_chain
;
299 struct bp_location
*bp_location_chain
;
301 /* Number of last breakpoint made. */
303 int breakpoint_count
;
305 /* Pointer to current exception event record */
306 static struct exception_event_record
*current_exception_event
;
308 /* This function returns a pointer to the string representation of the
309 pathname of the dynamically-linked library that has just been
312 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
313 or undefined results are guaranteed.
315 This string's contents are only valid immediately after the
316 inferior has stopped in the dynamic linker hook, and becomes
317 invalid as soon as the inferior is continued. Clients should make
318 a copy of this string if they wish to continue the inferior and
319 then access the string. */
321 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
322 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
325 /* This function returns a pointer to the string representation of the
326 pathname of the dynamically-linked library that has just been
329 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
330 TRUE, or undefined results are guaranteed.
332 This string's contents are only valid immediately after the
333 inferior has stopped in the dynamic linker hook, and becomes
334 invalid as soon as the inferior is continued. Clients should make
335 a copy of this string if they wish to continue the inferior and
336 then access the string. */
338 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
339 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
342 /* This function is called by the "catch load" command. It allows the
343 debugger to be notified by the dynamic linker when a specified
344 library file (or any library file, if filename is NULL) is loaded. */
346 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
347 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
348 error (_("catch of library loads not yet implemented on this platform"))
351 /* This function is called by the "catch unload" command. It allows
352 the debugger to be notified by the dynamic linker when a specified
353 library file (or any library file, if filename is NULL) is
356 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
357 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid, tempflag, filename, cond_string) \
358 error (_("catch of library unloads not yet implemented on this platform"))
361 /* Return whether a breakpoint is an active enabled breakpoint. */
363 breakpoint_enabled (struct breakpoint
*b
)
365 return (b
->enable_state
== bp_enabled
);
368 /* Set breakpoint count to NUM. */
371 set_breakpoint_count (int num
)
373 breakpoint_count
= num
;
374 set_internalvar (lookup_internalvar ("bpnum"),
375 value_from_longest (builtin_type_int
, (LONGEST
) num
));
378 /* Used in run_command to zero the hit count when a new run starts. */
381 clear_breakpoint_hit_counts (void)
383 struct breakpoint
*b
;
389 /* Default address, symtab and line to put a breakpoint at
390 for "break" command with no arg.
391 if default_breakpoint_valid is zero, the other three are
392 not valid, and "break" with no arg is an error.
394 This set by print_stack_frame, which calls set_default_breakpoint. */
396 int default_breakpoint_valid
;
397 CORE_ADDR default_breakpoint_address
;
398 struct symtab
*default_breakpoint_symtab
;
399 int default_breakpoint_line
;
401 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
402 Advance *PP after the string and any trailing whitespace.
404 Currently the string can either be a number or "$" followed by the name
405 of a convenience variable. Making it an expression wouldn't work well
406 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
408 If the string is a NULL pointer, that denotes the last breakpoint.
410 TRAILER is a character which can be found after the number; most
411 commonly this is `-'. If you don't want a trailer, use \0. */
413 get_number_trailer (char **pp
, int trailer
)
415 int retval
= 0; /* default */
419 /* Empty line means refer to the last breakpoint. */
420 return breakpoint_count
;
423 /* Make a copy of the name, so we can null-terminate it
424 to pass to lookup_internalvar(). */
429 while (isalnum (*p
) || *p
== '_')
431 varname
= (char *) alloca (p
- start
+ 1);
432 strncpy (varname
, start
, p
- start
);
433 varname
[p
- start
] = '\0';
434 val
= value_of_internalvar (lookup_internalvar (varname
));
435 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
436 retval
= (int) value_as_long (val
);
439 printf_filtered (_("Convenience variable must have integer value.\n"));
447 while (*p
>= '0' && *p
<= '9')
450 /* There is no number here. (e.g. "cond a == b"). */
452 /* Skip non-numeric token */
453 while (*p
&& !isspace((int) *p
))
455 /* Return zero, which caller must interpret as error. */
461 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
463 /* Trailing junk: return 0 and let caller print error msg. */
464 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
475 /* Like get_number_trailer, but don't allow a trailer. */
477 get_number (char **pp
)
479 return get_number_trailer (pp
, '\0');
482 /* Parse a number or a range.
483 * A number will be of the form handled by get_number.
484 * A range will be of the form <number1> - <number2>, and
485 * will represent all the integers between number1 and number2,
488 * While processing a range, this fuction is called iteratively;
489 * At each call it will return the next value in the range.
491 * At the beginning of parsing a range, the char pointer PP will
492 * be advanced past <number1> and left pointing at the '-' token.
493 * Subsequent calls will not advance the pointer until the range
494 * is completed. The call that completes the range will advance
495 * pointer PP past <number2>.
499 get_number_or_range (char **pp
)
501 static int last_retval
, end_value
;
502 static char *end_ptr
;
503 static int in_range
= 0;
507 /* Default case: pp is pointing either to a solo number,
508 or to the first number of a range. */
509 last_retval
= get_number_trailer (pp
, '-');
514 /* This is the start of a range (<number1> - <number2>).
515 Skip the '-', parse and remember the second number,
516 and also remember the end of the final token. */
520 while (isspace ((int) *end_ptr
))
521 end_ptr
++; /* skip white space */
522 end_value
= get_number (temp
);
523 if (end_value
< last_retval
)
525 error (_("inverted range"));
527 else if (end_value
== last_retval
)
529 /* degenerate range (number1 == number2). Advance the
530 token pointer so that the range will be treated as a
539 error (_("negative value"));
542 /* pp points to the '-' that betokens a range. All
543 number-parsing has already been done. Return the next
544 integer value (one greater than the saved previous value).
545 Do not advance the token pointer 'pp' until the end of range
548 if (++last_retval
== end_value
)
550 /* End of range reached; advance token pointer. */
560 /* condition N EXP -- set break condition of breakpoint N to EXP. */
563 condition_command (char *arg
, int from_tty
)
565 struct breakpoint
*b
;
570 error_no_arg (_("breakpoint number"));
573 bnum
= get_number (&p
);
575 error (_("Bad breakpoint argument: '%s'"), arg
);
578 if (b
->number
== bnum
)
580 struct bp_location
*loc
= b
->loc
;
581 for (; loc
; loc
= loc
->next
)
589 if (b
->cond_string
!= NULL
)
590 xfree (b
->cond_string
);
594 b
->cond_string
= NULL
;
596 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
601 /* I don't know if it matters whether this is the string the user
602 typed in or the decompiled expression. */
603 b
->cond_string
= savestring (arg
, strlen (arg
));
604 b
->condition_not_parsed
= 0;
605 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
608 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
610 error (_("Junk at end of expression"));
613 breakpoints_changed ();
614 breakpoint_modify_event (b
->number
);
618 error (_("No breakpoint number %d."), bnum
);
622 commands_command (char *arg
, int from_tty
)
624 struct breakpoint
*b
;
627 struct command_line
*l
;
629 /* If we allowed this, we would have problems with when to
630 free the storage, if we change the commands currently
633 if (executing_breakpoint_commands
)
634 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
637 bnum
= get_number (&p
);
640 error (_("Unexpected extra arguments following breakpoint number."));
643 if (b
->number
== bnum
)
645 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
647 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
648 l
= read_command_lines (tmpbuf
, from_tty
);
649 do_cleanups (cleanups
);
650 free_command_lines (&b
->commands
);
652 breakpoints_changed ();
653 breakpoint_modify_event (b
->number
);
656 error (_("No breakpoint number %d."), bnum
);
659 /* Like commands_command, but instead of reading the commands from
660 input stream, takes them from an already parsed command structure.
662 This is used by cli-script.c to DTRT with breakpoint commands
663 that are part of if and while bodies. */
664 enum command_control_type
665 commands_from_control_command (char *arg
, struct command_line
*cmd
)
667 struct breakpoint
*b
;
671 /* If we allowed this, we would have problems with when to
672 free the storage, if we change the commands currently
675 if (executing_breakpoint_commands
)
676 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
678 /* An empty string for the breakpoint number means the last
679 breakpoint, but get_number expects a NULL pointer. */
684 bnum
= get_number (&p
);
687 error (_("Unexpected extra arguments following breakpoint number."));
690 if (b
->number
== bnum
)
692 free_command_lines (&b
->commands
);
693 if (cmd
->body_count
!= 1)
694 error (_("Invalid \"commands\" block structure."));
695 /* We need to copy the commands because if/while will free the
696 list after it finishes execution. */
697 b
->commands
= copy_command_lines (cmd
->body_list
[0]);
698 breakpoints_changed ();
699 breakpoint_modify_event (b
->number
);
700 return simple_control
;
702 error (_("No breakpoint number %d."), bnum
);
705 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
706 by replacing any memory breakpoints with their shadowed contents. */
709 breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
, LONGEST len
)
711 struct bp_location
*b
;
712 CORE_ADDR bp_addr
= 0;
718 if (b
->owner
->type
== bp_none
)
719 warning (_("reading through apparently deleted breakpoint #%d?"),
722 if (b
->loc_type
!= bp_loc_software_breakpoint
)
726 /* Addresses and length of the part of the breakpoint that
728 bp_addr
= b
->target_info
.placed_address
;
729 bp_size
= b
->target_info
.shadow_len
;
731 /* bp isn't valid, or doesn't shadow memory. */
734 if (bp_addr
+ bp_size
<= memaddr
)
735 /* The breakpoint is entirely before the chunk of memory we
739 if (bp_addr
>= memaddr
+ len
)
740 /* The breakpoint is entirely after the chunk of memory we are
744 /* Offset within shadow_contents. */
745 if (bp_addr
< memaddr
)
747 /* Only copy the second part of the breakpoint. */
748 bp_size
-= memaddr
- bp_addr
;
749 bptoffset
= memaddr
- bp_addr
;
753 if (bp_addr
+ bp_size
> memaddr
+ len
)
755 /* Only copy the first part of the breakpoint. */
756 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
759 memcpy (buf
+ bp_addr
- memaddr
,
760 b
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
765 /* A wrapper function for inserting catchpoints. */
767 insert_catchpoint (struct ui_out
*uo
, void *args
)
769 struct breakpoint
*b
= (struct breakpoint
*) args
;
775 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
778 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
781 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
784 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
790 is_hardware_watchpoint (struct breakpoint
*bpt
)
792 return (bpt
->type
== bp_hardware_watchpoint
793 || bpt
->type
== bp_read_watchpoint
794 || bpt
->type
== bp_access_watchpoint
);
797 /* Find the current value of a watchpoint on EXP. Return the value in
798 *VALP and *RESULTP and the chain of intermediate and final values
799 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
802 If an error occurs while evaluating the expression, *RESULTP will
803 be set to NULL. *RESULTP may be a lazy value, if the result could
804 not be read from memory. It is used to determine whether a value
805 is user-specified (we should watch the whole value) or intermediate
806 (we should watch only the bit used to locate the final value).
808 If the final value, or any intermediate value, could not be read
809 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
810 set to any referenced values. *VALP will never be a lazy value.
811 This is the value which we store in struct breakpoint.
813 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
814 value chain. The caller must free the values individually. If
815 VAL_CHAIN is NULL, all generated values will be left on the value
819 fetch_watchpoint_value (struct expression
*exp
, struct value
**valp
,
820 struct value
**resultp
, struct value
**val_chain
)
822 struct value
*mark
, *new_mark
, *result
;
830 /* Evaluate the expression. */
831 mark
= value_mark ();
833 gdb_evaluate_expression (exp
, &result
);
834 new_mark
= value_mark ();
835 if (mark
== new_mark
)
840 /* Make sure it's not lazy, so that after the target stops again we
841 have a non-lazy previous value to compare with. */
843 && (!value_lazy (result
) || gdb_value_fetch_lazy (result
)))
848 /* Return the chain of intermediate values. We use this to
849 decide which addresses to watch. */
850 *val_chain
= new_mark
;
851 value_release_to_mark (mark
);
855 /* Assuming that B is a hardware watchpoint:
856 - Reparse watchpoint expression, is REPARSE is non-zero
857 - Evaluate expression and store the result in B->val
858 - Update the list of values that must be watched in B->loc.
860 If the watchpoint is disabled, do nothing. If this is
861 local watchpoint that is out of scope, delete it. */
863 update_watchpoint (struct breakpoint
*b
, int reparse
)
865 int within_current_scope
;
866 struct frame_id saved_frame_id
;
867 struct bp_location
*loc
;
870 unlink_locations_from_global_list (b
);
871 for (loc
= b
->loc
; loc
;)
873 struct bp_location
*loc_next
= loc
->next
;
874 remove_breakpoint (loc
, mark_uninserted
);
880 if (b
->disposition
== disp_del_at_next_stop
)
883 /* Save the current frame's ID so we can restore it after
884 evaluating the watchpoint expression on its own frame. */
885 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
886 took a frame parameter, so that we didn't have to change the
888 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
890 /* Determine if the watchpoint is within scope. */
891 if (b
->exp_valid_block
== NULL
)
892 within_current_scope
= 1;
895 struct frame_info
*fi
;
896 fi
= frame_find_by_id (b
->watchpoint_frame
);
897 within_current_scope
= (fi
!= NULL
);
898 if (within_current_scope
)
902 if (within_current_scope
&& reparse
)
911 b
->exp
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
912 /* If the meaning of expression itself changed, the old value is
913 no longer relevant. We don't want to report a watchpoint hit
914 to the user when the old value and the new value may actually
915 be completely different objects. */
921 /* If we failed to parse the expression, for example because
922 it refers to a global variable in a not-yet-loaded shared library,
923 don't try to insert watchpoint. We don't automatically delete
924 such watchpoint, though, since failure to parse expression
925 is different from out-of-scope watchpoint. */
926 if (within_current_scope
&& b
->exp
)
928 struct value
*val_chain
, *v
, *result
, *next
;
930 fetch_watchpoint_value (b
->exp
, &v
, &result
, &val_chain
);
932 /* Avoid setting b->val if it's already set. The meaning of
933 b->val is 'the last value' user saw, and we should update
934 it only if we reported that last value to user. As it
935 happens, the code that reports it updates b->val directly. */
942 /* Look at each value on the value chain. */
943 for (v
= val_chain
; v
; v
= next
)
945 /* If it's a memory location, and GDB actually needed
946 its contents to evaluate the expression, then we
947 must watch it. If the first value returned is
948 still lazy, that means an error occurred reading it;
949 watch it anyway in case it becomes readable. */
950 if (VALUE_LVAL (v
) == lval_memory
951 && (v
== val_chain
|| ! value_lazy (v
)))
953 struct type
*vtype
= check_typedef (value_type (v
));
955 /* We only watch structs and arrays if user asked
956 for it explicitly, never if they just happen to
957 appear in the middle of some value chain. */
959 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
960 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
964 struct bp_location
*loc
, **tmp
;
966 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
967 len
= TYPE_LENGTH (value_type (v
));
969 if (b
->type
== bp_read_watchpoint
)
971 else if (b
->type
== bp_access_watchpoint
)
974 loc
= allocate_bp_location (b
, bp_hardware_watchpoint
);
975 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
980 loc
->watchpoint_type
= type
;
984 next
= value_next (v
);
989 if (reparse
&& b
->cond_string
!= NULL
)
991 char *s
= b
->cond_string
;
994 xfree (b
->loc
->cond
);
997 b
->loc
->cond
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
1000 else if (!within_current_scope
)
1002 printf_filtered (_("\
1003 Hardware watchpoint %d deleted because the program has left the block \n\
1004 in which its expression is valid.\n"),
1006 if (b
->related_breakpoint
)
1007 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1008 b
->disposition
= disp_del_at_next_stop
;
1011 /* Restore the selected frame. */
1012 select_frame (frame_find_by_id (saved_frame_id
));
1016 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1017 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1018 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
1020 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1021 method for each breakpoint or catchpoint type. */
1023 insert_bp_location (struct bp_location
*bpt
,
1024 struct ui_file
*tmp_error_stream
,
1025 int *disabled_breaks
, int *process_warning
,
1026 int *hw_breakpoint_error
)
1030 if (!breakpoint_enabled (bpt
->owner
))
1033 if (!bpt
->enabled
|| bpt
->shlib_disabled
|| bpt
->inserted
|| bpt
->duplicate
)
1036 /* Initialize the target-specific information. */
1037 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
1038 bpt
->target_info
.placed_address
= bpt
->address
;
1040 if (bpt
->loc_type
== bp_loc_software_breakpoint
1041 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1043 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
1045 /* If the explicitly specified breakpoint type
1046 is not hardware breakpoint, check the memory map to see
1047 if the breakpoint address is in read only memory or not.
1048 Two important cases are:
1049 - location type is not hardware breakpoint, memory
1050 is readonly. We change the type of the location to
1051 hardware breakpoint.
1052 - location type is hardware breakpoint, memory is read-write.
1053 This means we've previously made the location hardware one, but
1054 then the memory map changed, so we undo.
1056 When breakpoints are removed, remove_breakpoints will
1057 use location types we've just set here, the only possible
1058 problem is that memory map has changed during running program,
1059 but it's not going to work anyway with current gdb. */
1060 struct mem_region
*mr
1061 = lookup_mem_region (bpt
->target_info
.placed_address
);
1065 if (automatic_hardware_breakpoints
)
1068 enum bp_loc_type new_type
;
1070 if (mr
->attrib
.mode
!= MEM_RW
)
1071 new_type
= bp_loc_hardware_breakpoint
;
1073 new_type
= bp_loc_software_breakpoint
;
1075 if (new_type
!= bpt
->loc_type
)
1077 static int said
= 0;
1078 bpt
->loc_type
= new_type
;
1081 fprintf_filtered (gdb_stdout
, _("\
1082 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1087 else if (bpt
->loc_type
== bp_loc_software_breakpoint
1088 && mr
->attrib
.mode
!= MEM_RW
)
1089 warning (_("cannot set software breakpoint at readonly address %s"),
1090 paddr (bpt
->address
));
1094 /* First check to see if we have to handle an overlay. */
1095 if (overlay_debugging
== ovly_off
1096 || bpt
->section
== NULL
1097 || !(section_is_overlay (bpt
->section
)))
1099 /* No overlay handling: just set the breakpoint. */
1101 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1102 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1104 val
= target_insert_breakpoint (&bpt
->target_info
);
1108 /* This breakpoint is in an overlay section.
1109 Shall we set a breakpoint at the LMA? */
1110 if (!overlay_events_enabled
)
1112 /* Yes -- overlay event support is not active,
1113 so we must try to set a breakpoint at the LMA.
1114 This will not work for a hardware breakpoint. */
1115 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1116 warning (_("hardware breakpoint %d not supported in overlay!"),
1117 bpt
->owner
->number
);
1120 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
1122 /* Set a software (trap) breakpoint at the LMA. */
1123 bpt
->overlay_target_info
= bpt
->target_info
;
1124 bpt
->overlay_target_info
.placed_address
= addr
;
1125 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
1127 fprintf_unfiltered (tmp_error_stream
,
1128 "Overlay breakpoint %d failed: in ROM?",
1129 bpt
->owner
->number
);
1132 /* Shall we set a breakpoint at the VMA? */
1133 if (section_is_mapped (bpt
->section
))
1135 /* Yes. This overlay section is mapped into memory. */
1136 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1137 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1139 val
= target_insert_breakpoint (&bpt
->target_info
);
1143 /* No. This breakpoint will not be inserted.
1144 No error, but do not mark the bp as 'inserted'. */
1151 /* Can't set the breakpoint. */
1152 if (solib_address (bpt
->address
))
1154 /* See also: disable_breakpoints_in_shlibs. */
1156 bpt
->shlib_disabled
= 1;
1157 if (!*disabled_breaks
)
1159 fprintf_unfiltered (tmp_error_stream
,
1160 "Cannot insert breakpoint %d.\n",
1161 bpt
->owner
->number
);
1162 fprintf_unfiltered (tmp_error_stream
,
1163 "Temporarily disabling shared library breakpoints:\n");
1165 *disabled_breaks
= 1;
1166 fprintf_unfiltered (tmp_error_stream
,
1167 "breakpoint #%d\n", bpt
->owner
->number
);
1171 #ifdef ONE_PROCESS_WRITETEXT
1172 *process_warning
= 1;
1174 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1176 *hw_breakpoint_error
= 1;
1177 fprintf_unfiltered (tmp_error_stream
,
1178 "Cannot insert hardware breakpoint %d.\n",
1179 bpt
->owner
->number
);
1183 fprintf_unfiltered (tmp_error_stream
,
1184 "Cannot insert breakpoint %d.\n",
1185 bpt
->owner
->number
);
1186 fprintf_filtered (tmp_error_stream
,
1187 "Error accessing memory address ");
1188 fputs_filtered (paddress (bpt
->address
), tmp_error_stream
);
1189 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1190 safe_strerror (val
));
1201 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
1202 /* NOTE drow/2003-09-08: This state only exists for removing
1203 watchpoints. It's not clear that it's necessary... */
1204 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
1206 val
= target_insert_watchpoint (bpt
->address
,
1208 bpt
->watchpoint_type
);
1209 bpt
->inserted
= (val
!= -1);
1212 else if (bpt
->owner
->type
== bp_catch_fork
1213 || bpt
->owner
->type
== bp_catch_vfork
1214 || bpt
->owner
->type
== bp_catch_exec
)
1216 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1217 bpt
->owner
, RETURN_MASK_ERROR
);
1218 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1219 bpt
->owner
->number
);
1221 bpt
->owner
->enable_state
= bp_disabled
;
1225 /* We've already printed an error message if there was a problem
1226 inserting this catchpoint, and we've disabled the catchpoint,
1227 so just return success. */
1234 /* insert_breakpoints is used when starting or continuing the program.
1235 remove_breakpoints is used when the program stops.
1236 Both return zero if successful,
1237 or an `errno' value if could not write the inferior. */
1240 insert_breakpoints (void)
1242 struct breakpoint
*bpt
;
1243 struct bp_location
*b
, *temp
;
1246 int disabled_breaks
= 0;
1247 int hw_breakpoint_error
= 0;
1248 int process_warning
= 0;
1250 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1251 make_cleanup_ui_file_delete (tmp_error_stream
);
1253 /* Explicitly mark the warning -- this will only be printed if
1254 there was an error. */
1255 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1257 ALL_BREAKPOINTS (bpt
)
1258 if (is_hardware_watchpoint (bpt
))
1259 update_watchpoint (bpt
, 0 /* don't reparse */);
1261 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1263 if (!breakpoint_enabled (b
->owner
))
1266 /* There is no point inserting thread-specific breakpoints if the
1267 thread no longer exists. */
1268 if (b
->owner
->thread
!= -1
1269 && !valid_thread_id (b
->owner
->thread
))
1272 val
= insert_bp_location (b
, tmp_error_stream
,
1273 &disabled_breaks
, &process_warning
,
1274 &hw_breakpoint_error
);
1279 /* If we failed to insert all locations of a watchpoint,
1280 remove them, as half-inserted watchpoint is of limited use. */
1281 ALL_BREAKPOINTS (bpt
)
1283 int some_failed
= 0;
1284 struct bp_location
*loc
;
1286 if (!is_hardware_watchpoint (bpt
))
1289 if (bpt
->enable_state
!= bp_enabled
)
1292 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1300 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1302 remove_breakpoint (loc
, mark_uninserted
);
1304 hw_breakpoint_error
= 1;
1305 fprintf_unfiltered (tmp_error_stream
,
1306 "Could not insert hardware watchpoint %d.\n",
1314 /* If a hardware breakpoint or watchpoint was inserted, add a
1315 message about possibly exhausted resources. */
1316 if (hw_breakpoint_error
)
1318 fprintf_unfiltered (tmp_error_stream
,
1319 "Could not insert hardware breakpoints:\n\
1320 You may have requested too many hardware breakpoints/watchpoints.\n");
1322 #ifdef ONE_PROCESS_WRITETEXT
1323 if (process_warning
)
1324 fprintf_unfiltered (tmp_error_stream
,
1325 "The same program may be running in another process.");
1327 target_terminal_ours_for_output ();
1328 error_stream (tmp_error_stream
);
1333 remove_breakpoints (void)
1335 struct bp_location
*b
;
1338 ALL_BP_LOCATIONS (b
)
1342 val
= remove_breakpoint (b
, mark_uninserted
);
1351 remove_hw_watchpoints (void)
1353 struct bp_location
*b
;
1356 ALL_BP_LOCATIONS (b
)
1358 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1360 val
= remove_breakpoint (b
, mark_uninserted
);
1369 reattach_breakpoints (int pid
)
1371 struct bp_location
*b
;
1373 struct cleanup
*old_chain
= save_inferior_ptid ();
1374 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1375 int dummy1
= 0, dummy2
= 0, dummy3
= 0;
1377 make_cleanup_ui_file_delete (tmp_error_stream
);
1379 inferior_ptid
= pid_to_ptid (pid
);
1380 ALL_BP_LOCATIONS (b
)
1385 val
= insert_bp_location (b
, tmp_error_stream
,
1386 &dummy1
, &dummy2
, &dummy3
);
1389 do_cleanups (old_chain
);
1394 do_cleanups (old_chain
);
1399 update_breakpoints_after_exec (void)
1401 struct breakpoint
*b
;
1402 struct breakpoint
*temp
;
1404 /* Doing this first prevents the badness of having delete_breakpoint()
1405 write a breakpoint's current "shadow contents" to lift the bp. That
1406 shadow is NOT valid after an exec()! */
1407 mark_breakpoints_out ();
1409 ALL_BREAKPOINTS_SAFE (b
, temp
)
1411 /* Solib breakpoints must be explicitly reset after an exec(). */
1412 if (b
->type
== bp_shlib_event
)
1414 delete_breakpoint (b
);
1418 /* Thread event breakpoints must be set anew after an exec(),
1419 as must overlay event breakpoints. */
1420 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1422 delete_breakpoint (b
);
1426 /* Step-resume breakpoints are meaningless after an exec(). */
1427 if (b
->type
== bp_step_resume
)
1429 delete_breakpoint (b
);
1433 /* Don't delete an exec catchpoint, because else the inferior
1434 won't stop when it ought!
1436 Similarly, we probably ought to keep vfork catchpoints, 'cause
1437 on this target, we may not be able to stop when the vfork is
1438 seen, but only when the subsequent exec is seen. (And because
1439 deleting fork catchpoints here but not vfork catchpoints will
1440 seem mysterious to users, keep those too.) */
1441 if ((b
->type
== bp_catch_exec
) ||
1442 (b
->type
== bp_catch_vfork
) ||
1443 (b
->type
== bp_catch_fork
))
1448 /* bp_finish is a special case. The only way we ought to be able
1449 to see one of these when an exec() has happened, is if the user
1450 caught a vfork, and then said "finish". Ordinarily a finish just
1451 carries them to the call-site of the current callee, by setting
1452 a temporary bp there and resuming. But in this case, the finish
1453 will carry them entirely through the vfork & exec.
1455 We don't want to allow a bp_finish to remain inserted now. But
1456 we can't safely delete it, 'cause finish_command has a handle to
1457 the bp on a bpstat, and will later want to delete it. There's a
1458 chance (and I've seen it happen) that if we delete the bp_finish
1459 here, that its storage will get reused by the time finish_command
1460 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1461 We really must allow finish_command to delete a bp_finish.
1463 In the absense of a general solution for the "how do we know
1464 it's safe to delete something others may have handles to?"
1465 problem, what we'll do here is just uninsert the bp_finish, and
1466 let finish_command delete it.
1468 (We know the bp_finish is "doomed" in the sense that it's
1469 momentary, and will be deleted as soon as finish_command sees
1470 the inferior stopped. So it doesn't matter that the bp's
1471 address is probably bogus in the new a.out, unlike e.g., the
1472 solib breakpoints.) */
1474 if (b
->type
== bp_finish
)
1479 /* Without a symbolic address, we have little hope of the
1480 pre-exec() address meaning the same thing in the post-exec()
1482 if (b
->addr_string
== NULL
)
1484 delete_breakpoint (b
);
1488 /* FIXME what about longjmp breakpoints? Re-create them here? */
1489 create_overlay_event_breakpoint ("_ovly_debug_event");
1493 detach_breakpoints (int pid
)
1495 struct bp_location
*b
;
1497 struct cleanup
*old_chain
= save_inferior_ptid ();
1499 if (pid
== PIDGET (inferior_ptid
))
1500 error (_("Cannot detach breakpoints of inferior_ptid"));
1502 /* Set inferior_ptid; remove_breakpoint uses this global. */
1503 inferior_ptid
= pid_to_ptid (pid
);
1504 ALL_BP_LOCATIONS (b
)
1508 val
= remove_breakpoint (b
, mark_inserted
);
1511 do_cleanups (old_chain
);
1516 do_cleanups (old_chain
);
1521 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1525 if (b
->owner
->enable_state
== bp_permanent
)
1526 /* Permanent breakpoints cannot be inserted or removed. */
1529 if (b
->owner
->type
== bp_none
)
1530 warning (_("attempted to remove apparently deleted breakpoint #%d?"),
1533 if (b
->loc_type
== bp_loc_software_breakpoint
1534 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1536 /* "Normal" instruction breakpoint: either the standard
1537 trap-instruction bp (bp_breakpoint), or a
1538 bp_hardware_breakpoint. */
1540 /* First check to see if we have to handle an overlay. */
1541 if (overlay_debugging
== ovly_off
1542 || b
->section
== NULL
1543 || !(section_is_overlay (b
->section
)))
1545 /* No overlay handling: just remove the breakpoint. */
1547 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1548 val
= target_remove_hw_breakpoint (&b
->target_info
);
1550 val
= target_remove_breakpoint (&b
->target_info
);
1554 /* This breakpoint is in an overlay section.
1555 Did we set a breakpoint at the LMA? */
1556 if (!overlay_events_enabled
)
1558 /* Yes -- overlay event support is not active, so we
1559 should have set a breakpoint at the LMA. Remove it.
1561 /* Ignore any failures: if the LMA is in ROM, we will
1562 have already warned when we failed to insert it. */
1563 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1564 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1566 target_remove_breakpoint (&b
->overlay_target_info
);
1568 /* Did we set a breakpoint at the VMA?
1569 If so, we will have marked the breakpoint 'inserted'. */
1572 /* Yes -- remove it. Previously we did not bother to
1573 remove the breakpoint if the section had been
1574 unmapped, but let's not rely on that being safe. We
1575 don't know what the overlay manager might do. */
1576 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1577 val
= target_remove_hw_breakpoint (&b
->target_info
);
1579 /* However, we should remove *software* breakpoints only
1580 if the section is still mapped, or else we overwrite
1581 wrong code with the saved shadow contents. */
1582 else if (section_is_mapped (b
->section
))
1583 val
= target_remove_breakpoint (&b
->target_info
);
1589 /* No -- not inserted, so no need to remove. No error. */
1595 b
->inserted
= (is
== mark_inserted
);
1597 else if (b
->loc_type
== bp_loc_hardware_watchpoint
)
1602 b
->inserted
= (is
== mark_inserted
);
1603 val
= target_remove_watchpoint (b
->address
, b
->length
,
1604 b
->watchpoint_type
);
1606 /* Failure to remove any of the hardware watchpoints comes here. */
1607 if ((is
== mark_uninserted
) && (b
->inserted
))
1608 warning (_("Could not remove hardware watchpoint %d."),
1611 else if ((b
->owner
->type
== bp_catch_fork
||
1612 b
->owner
->type
== bp_catch_vfork
||
1613 b
->owner
->type
== bp_catch_exec
)
1614 && breakpoint_enabled (b
->owner
)
1618 switch (b
->owner
->type
)
1621 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1623 case bp_catch_vfork
:
1624 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1627 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1630 warning (_("Internal error, %s line %d."), __FILE__
, __LINE__
);
1635 b
->inserted
= (is
== mark_inserted
);
1641 /* Clear the "inserted" flag in all breakpoints. */
1644 mark_breakpoints_out (void)
1646 struct bp_location
*bpt
;
1648 ALL_BP_LOCATIONS (bpt
)
1652 /* Clear the "inserted" flag in all breakpoints and delete any
1653 breakpoints which should go away between runs of the program.
1655 Plus other such housekeeping that has to be done for breakpoints
1658 Note: this function gets called at the end of a run (by
1659 generic_mourn_inferior) and when a run begins (by
1660 init_wait_for_inferior). */
1665 breakpoint_init_inferior (enum inf_context context
)
1667 struct breakpoint
*b
, *temp
;
1668 struct bp_location
*bpt
;
1670 ALL_BP_LOCATIONS (bpt
)
1673 ALL_BREAKPOINTS_SAFE (b
, temp
)
1678 case bp_watchpoint_scope
:
1680 /* If the call dummy breakpoint is at the entry point it will
1681 cause problems when the inferior is rerun, so we better
1684 Also get rid of scope breakpoints. */
1685 delete_breakpoint (b
);
1689 case bp_hardware_watchpoint
:
1690 case bp_read_watchpoint
:
1691 case bp_access_watchpoint
:
1693 /* Likewise for watchpoints on local expressions. */
1694 if (b
->exp_valid_block
!= NULL
)
1695 delete_breakpoint (b
);
1696 else if (context
== inf_starting
)
1698 /* Reset val field to force reread of starting value
1699 in insert_breakpoints. */
1701 value_free (b
->val
);
1712 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1713 exists at PC. It returns ordinary_breakpoint_here if it's an
1714 ordinary breakpoint, or permanent_breakpoint_here if it's a
1715 permanent breakpoint.
1716 - When continuing from a location with an ordinary breakpoint, we
1717 actually single step once before calling insert_breakpoints.
1718 - When continuing from a localion with a permanent breakpoint, we
1719 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1720 the target, to advance the PC past the breakpoint. */
1722 enum breakpoint_here
1723 breakpoint_here_p (CORE_ADDR pc
)
1725 const struct bp_location
*bpt
;
1726 int any_breakpoint_here
= 0;
1728 ALL_BP_LOCATIONS (bpt
)
1730 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1731 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1734 if ((breakpoint_enabled (bpt
->owner
)
1735 || bpt
->owner
->enable_state
== bp_permanent
)
1736 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1738 if (overlay_debugging
1739 && section_is_overlay (bpt
->section
)
1740 && !section_is_mapped (bpt
->section
))
1741 continue; /* unmapped overlay -- can't be a match */
1742 else if (bpt
->owner
->enable_state
== bp_permanent
)
1743 return permanent_breakpoint_here
;
1745 any_breakpoint_here
= 1;
1749 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1753 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1754 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1755 This does not check for single-step breakpoints, which are
1756 inserted and removed using direct target manipulation. */
1759 regular_breakpoint_inserted_here_p (CORE_ADDR pc
)
1761 const struct bp_location
*bpt
;
1763 ALL_BP_LOCATIONS (bpt
)
1765 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1766 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1770 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1772 if (overlay_debugging
1773 && section_is_overlay (bpt
->section
)
1774 && !section_is_mapped (bpt
->section
))
1775 continue; /* unmapped overlay -- can't be a match */
1783 /* Returns non-zero iff there's either regular breakpoint
1784 or a single step breakpoint inserted at PC. */
1787 breakpoint_inserted_here_p (CORE_ADDR pc
)
1789 if (regular_breakpoint_inserted_here_p (pc
))
1792 if (single_step_breakpoint_inserted_here_p (pc
))
1798 /* This function returns non-zero iff there is a software breakpoint
1802 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1804 const struct bp_location
*bpt
;
1805 int any_breakpoint_here
= 0;
1807 ALL_BP_LOCATIONS (bpt
)
1809 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1813 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1815 if (overlay_debugging
1816 && section_is_overlay (bpt
->section
)
1817 && !section_is_mapped (bpt
->section
))
1818 continue; /* unmapped overlay -- can't be a match */
1824 /* Also check for software single-step breakpoints. */
1825 if (single_step_breakpoint_inserted_here_p (pc
))
1831 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1832 PC is valid for process/thread PTID. */
1835 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1837 const struct bp_location
*bpt
;
1840 thread
= pid_to_thread_id (ptid
);
1842 ALL_BP_LOCATIONS (bpt
)
1844 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1845 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1848 if ((breakpoint_enabled (bpt
->owner
)
1849 || bpt
->owner
->enable_state
== bp_permanent
)
1850 && bpt
->address
== pc
1851 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1853 if (overlay_debugging
1854 && section_is_overlay (bpt
->section
)
1855 && !section_is_mapped (bpt
->section
))
1856 continue; /* unmapped overlay -- can't be a match */
1866 /* bpstat stuff. External routines' interfaces are documented
1870 ep_is_catchpoint (struct breakpoint
*ep
)
1873 (ep
->type
== bp_catch_load
)
1874 || (ep
->type
== bp_catch_unload
)
1875 || (ep
->type
== bp_catch_fork
)
1876 || (ep
->type
== bp_catch_vfork
)
1877 || (ep
->type
== bp_catch_exec
);
1879 /* ??rehrauer: Add more kinds here, as are implemented... */
1883 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1886 (ep
->type
== bp_catch_load
)
1887 || (ep
->type
== bp_catch_unload
);
1891 bpstat_free (bpstat bs
)
1893 if (bs
->old_val
!= NULL
)
1894 value_free (bs
->old_val
);
1895 free_command_lines (&bs
->commands
);
1899 /* Clear a bpstat so that it says we are not at any breakpoint.
1900 Also free any storage that is part of a bpstat. */
1903 bpstat_clear (bpstat
*bsp
)
1920 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1921 is part of the bpstat is copied as well. */
1924 bpstat_copy (bpstat bs
)
1928 bpstat retval
= NULL
;
1933 for (; bs
!= NULL
; bs
= bs
->next
)
1935 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1936 memcpy (tmp
, bs
, sizeof (*tmp
));
1937 if (bs
->commands
!= NULL
)
1938 tmp
->commands
= copy_command_lines (bs
->commands
);
1939 if (bs
->old_val
!= NULL
)
1940 tmp
->old_val
= value_copy (bs
->old_val
);
1943 /* This is the first thing in the chain. */
1953 /* Find the bpstat associated with this breakpoint */
1956 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1961 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1963 if (bsp
->breakpoint_at
&& bsp
->breakpoint_at
->owner
== breakpoint
)
1969 /* Find a step_resume breakpoint associated with this bpstat.
1970 (If there are multiple step_resume bp's on the list, this function
1971 will arbitrarily pick one.)
1973 It is an error to use this function if BPSTAT doesn't contain a
1974 step_resume breakpoint.
1976 See wait_for_inferior's use of this function. */
1978 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1982 gdb_assert (bsp
!= NULL
);
1984 current_thread
= pid_to_thread_id (inferior_ptid
);
1986 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1988 if ((bsp
->breakpoint_at
!= NULL
) &&
1989 (bsp
->breakpoint_at
->owner
->type
== bp_step_resume
) &&
1990 (bsp
->breakpoint_at
->owner
->thread
== current_thread
||
1991 bsp
->breakpoint_at
->owner
->thread
== -1))
1992 return bsp
->breakpoint_at
->owner
;
1995 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
1999 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2000 at. *BSP upon return is a bpstat which points to the remaining
2001 breakpoints stopped at (but which is not guaranteed to be good for
2002 anything but further calls to bpstat_num).
2003 Return 0 if passed a bpstat which does not indicate any breakpoints.
2004 Return -1 if stopped at a breakpoint that has been deleted since
2006 Return 1 otherwise. */
2009 bpstat_num (bpstat
*bsp
, int *num
)
2011 struct breakpoint
*b
;
2014 return 0; /* No more breakpoint values */
2016 /* We assume we'll never have several bpstats that
2017 correspond to a single breakpoint -- otherwise,
2018 this function might return the same number more
2019 than once and this will look ugly. */
2020 b
= (*bsp
)->breakpoint_at
? (*bsp
)->breakpoint_at
->owner
: NULL
;
2021 *bsp
= (*bsp
)->next
;
2023 return -1; /* breakpoint that's been deleted since */
2025 *num
= b
->number
; /* We have its number */
2029 /* Modify BS so that the actions will not be performed. */
2032 bpstat_clear_actions (bpstat bs
)
2034 for (; bs
!= NULL
; bs
= bs
->next
)
2036 free_command_lines (&bs
->commands
);
2037 if (bs
->old_val
!= NULL
)
2039 value_free (bs
->old_val
);
2045 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2047 cleanup_executing_breakpoints (void *ignore
)
2049 executing_breakpoint_commands
= 0;
2052 /* Execute all the commands associated with all the breakpoints at this
2053 location. Any of these commands could cause the process to proceed
2054 beyond this point, etc. We look out for such changes by checking
2055 the global "breakpoint_proceeded" after each command. */
2058 bpstat_do_actions (bpstat
*bsp
)
2061 struct cleanup
*old_chain
;
2063 /* Avoid endless recursion if a `source' command is contained
2065 if (executing_breakpoint_commands
)
2068 executing_breakpoint_commands
= 1;
2069 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2072 /* Note that (as of this writing), our callers all appear to
2073 be passing us the address of global stop_bpstat. And, if
2074 our calls to execute_control_command cause the inferior to
2075 proceed, that global (and hence, *bsp) will change.
2077 We must be careful to not touch *bsp unless the inferior
2078 has not proceeded. */
2080 /* This pointer will iterate over the list of bpstat's. */
2083 breakpoint_proceeded
= 0;
2084 for (; bs
!= NULL
; bs
= bs
->next
)
2086 struct command_line
*cmd
;
2087 struct cleanup
*this_cmd_tree_chain
;
2089 /* Take ownership of the BSP's command tree, if it has one.
2091 The command tree could legitimately contain commands like
2092 'step' and 'next', which call clear_proceed_status, which
2093 frees stop_bpstat's command tree. To make sure this doesn't
2094 free the tree we're executing out from under us, we need to
2095 take ownership of the tree ourselves. Since a given bpstat's
2096 commands are only executed once, we don't need to copy it; we
2097 can clear the pointer in the bpstat, and make sure we free
2098 the tree when we're done. */
2101 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2105 execute_control_command (cmd
);
2107 if (breakpoint_proceeded
)
2113 /* We can free this command tree now. */
2114 do_cleanups (this_cmd_tree_chain
);
2116 if (breakpoint_proceeded
)
2118 if (target_can_async_p ())
2119 /* If we are in async mode, then the target might
2120 be still running, not stopped at any breakpoint,
2121 so nothing for us to do here -- just return to
2125 /* In sync mode, when execute_control_command returns
2126 we're already standing on the next breakpoint.
2127 Breakpoint commands for that stop were not run,
2128 since execute_command does not run breakpoint
2129 commands -- only command_line_handler does, but
2130 that one is not involved in execution of breakpoint
2131 commands. So, we can now execute breakpoint commands.
2132 There's an implicit assumption that we're called with
2133 stop_bpstat, so our parameter is the new bpstat to
2135 It should be noted that making execute_command do
2136 bpstat actions is not an option -- in this case we'll
2137 have recursive invocation of bpstat for each breakpoint
2138 with a command, and can easily blow up GDB stack. */
2142 do_cleanups (old_chain
);
2145 /* Print out the (old or new) value associated with a watchpoint. */
2148 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2151 fprintf_unfiltered (stream
, _("<unreadable>"));
2153 value_print (val
, stream
, 0, Val_pretty_default
);
2156 /* This is the normal print function for a bpstat. In the future,
2157 much of this logic could (should?) be moved to bpstat_stop_status,
2158 by having it set different print_it values.
2160 Current scheme: When we stop, bpstat_print() is called. It loops
2161 through the bpstat list of things causing this stop, calling the
2162 print_bp_stop_message function on each one. The behavior of the
2163 print_bp_stop_message function depends on the print_it field of
2164 bpstat. If such field so indicates, call this function here.
2166 Return values from this routine (ultimately used by bpstat_print()
2167 and normal_stop() to decide what to do):
2168 PRINT_NOTHING: Means we already printed all we needed to print,
2169 don't print anything else.
2170 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2171 that something to be followed by a location.
2172 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2173 that something to be followed by a location.
2174 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2177 static enum print_stop_action
2178 print_it_typical (bpstat bs
)
2180 struct cleanup
*old_chain
, *ui_out_chain
;
2181 struct breakpoint
*b
;
2182 const struct bp_location
*bl
;
2183 struct ui_stream
*stb
;
2184 stb
= ui_out_stream_new (uiout
);
2185 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2186 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2187 which has since been deleted. */
2188 if (bs
->breakpoint_at
== NULL
)
2189 return PRINT_UNKNOWN
;
2190 bl
= bs
->breakpoint_at
;
2196 case bp_hardware_breakpoint
:
2197 if (bl
->address
!= bl
->requested_address
)
2198 breakpoint_adjustment_warning (bl
->requested_address
,
2201 annotate_breakpoint (b
->number
);
2202 ui_out_text (uiout
, "\nBreakpoint ");
2203 if (ui_out_is_mi_like_p (uiout
))
2204 ui_out_field_string (uiout
, "reason",
2205 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2206 ui_out_field_int (uiout
, "bkptno", b
->number
);
2207 ui_out_text (uiout
, ", ");
2208 return PRINT_SRC_AND_LOC
;
2211 case bp_shlib_event
:
2212 /* Did we stop because the user set the stop_on_solib_events
2213 variable? (If so, we report this as a generic, "Stopped due
2214 to shlib event" message.) */
2215 printf_filtered (_("Stopped due to shared library event\n"));
2216 return PRINT_NOTHING
;
2219 case bp_thread_event
:
2220 /* Not sure how we will get here.
2221 GDB should not stop for these breakpoints. */
2222 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2223 return PRINT_NOTHING
;
2226 case bp_overlay_event
:
2227 /* By analogy with the thread event, GDB should not stop for these. */
2228 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2229 return PRINT_NOTHING
;
2233 annotate_catchpoint (b
->number
);
2234 printf_filtered (_("\nCatchpoint %d (loaded %s), "),
2236 b
->triggered_dll_pathname
);
2237 return PRINT_SRC_AND_LOC
;
2240 case bp_catch_unload
:
2241 annotate_catchpoint (b
->number
);
2242 printf_filtered (_("\nCatchpoint %d (unloaded %s), "),
2244 b
->triggered_dll_pathname
);
2245 return PRINT_SRC_AND_LOC
;
2249 annotate_catchpoint (b
->number
);
2250 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
2252 b
->forked_inferior_pid
);
2253 return PRINT_SRC_AND_LOC
;
2256 case bp_catch_vfork
:
2257 annotate_catchpoint (b
->number
);
2258 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
2260 b
->forked_inferior_pid
);
2261 return PRINT_SRC_AND_LOC
;
2265 annotate_catchpoint (b
->number
);
2266 printf_filtered (_("\nCatchpoint %d (exec'd %s), "),
2269 return PRINT_SRC_AND_LOC
;
2273 case bp_hardware_watchpoint
:
2274 annotate_watchpoint (b
->number
);
2275 if (ui_out_is_mi_like_p (uiout
))
2278 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2280 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2281 ui_out_text (uiout
, "\nOld value = ");
2282 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2283 ui_out_field_stream (uiout
, "old", stb
);
2284 ui_out_text (uiout
, "\nNew value = ");
2285 watchpoint_value_print (b
->val
, stb
->stream
);
2286 ui_out_field_stream (uiout
, "new", stb
);
2287 do_cleanups (ui_out_chain
);
2288 ui_out_text (uiout
, "\n");
2289 /* More than one watchpoint may have been triggered. */
2290 return PRINT_UNKNOWN
;
2293 case bp_read_watchpoint
:
2294 if (ui_out_is_mi_like_p (uiout
))
2297 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2299 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2300 ui_out_text (uiout
, "\nValue = ");
2301 watchpoint_value_print (b
->val
, stb
->stream
);
2302 ui_out_field_stream (uiout
, "value", stb
);
2303 do_cleanups (ui_out_chain
);
2304 ui_out_text (uiout
, "\n");
2305 return PRINT_UNKNOWN
;
2308 case bp_access_watchpoint
:
2309 if (bs
->old_val
!= NULL
)
2311 annotate_watchpoint (b
->number
);
2312 if (ui_out_is_mi_like_p (uiout
))
2315 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2317 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2318 ui_out_text (uiout
, "\nOld value = ");
2319 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2320 ui_out_field_stream (uiout
, "old", stb
);
2321 ui_out_text (uiout
, "\nNew value = ");
2326 if (ui_out_is_mi_like_p (uiout
))
2329 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2330 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2331 ui_out_text (uiout
, "\nValue = ");
2333 watchpoint_value_print (b
->val
, stb
->stream
);
2334 ui_out_field_stream (uiout
, "new", stb
);
2335 do_cleanups (ui_out_chain
);
2336 ui_out_text (uiout
, "\n");
2337 return PRINT_UNKNOWN
;
2340 /* Fall through, we don't deal with these types of breakpoints
2344 if (ui_out_is_mi_like_p (uiout
))
2347 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2348 return PRINT_UNKNOWN
;
2352 if (ui_out_is_mi_like_p (uiout
))
2355 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2356 return PRINT_UNKNOWN
;
2361 case bp_longjmp_resume
:
2362 case bp_step_resume
:
2363 case bp_watchpoint_scope
:
2366 return PRINT_UNKNOWN
;
2370 /* Generic routine for printing messages indicating why we
2371 stopped. The behavior of this function depends on the value
2372 'print_it' in the bpstat structure. Under some circumstances we
2373 may decide not to print anything here and delegate the task to
2376 static enum print_stop_action
2377 print_bp_stop_message (bpstat bs
)
2379 switch (bs
->print_it
)
2382 /* Nothing should be printed for this bpstat entry. */
2383 return PRINT_UNKNOWN
;
2387 /* We still want to print the frame, but we already printed the
2388 relevant messages. */
2389 return PRINT_SRC_AND_LOC
;
2392 case print_it_normal
:
2394 const struct bp_location
*bl
= bs
->breakpoint_at
;
2395 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2397 /* Normal case. Call the breakpoint's print_it method, or
2398 print_it_typical. */
2399 /* FIXME: how breakpoint can ever be NULL here? */
2400 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2401 return b
->ops
->print_it (b
);
2403 return print_it_typical (bs
);
2408 internal_error (__FILE__
, __LINE__
,
2409 _("print_bp_stop_message: unrecognized enum value"));
2414 /* Print a message indicating what happened. This is called from
2415 normal_stop(). The input to this routine is the head of the bpstat
2416 list - a list of the eventpoints that caused this stop. This
2417 routine calls the generic print routine for printing a message
2418 about reasons for stopping. This will print (for example) the
2419 "Breakpoint n," part of the output. The return value of this
2422 PRINT_UNKNOWN: Means we printed nothing
2423 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2424 code to print the location. An example is
2425 "Breakpoint 1, " which should be followed by
2427 PRINT_SRC_ONLY: Means we printed something, but there is no need
2428 to also print the location part of the message.
2429 An example is the catch/throw messages, which
2430 don't require a location appended to the end.
2431 PRINT_NOTHING: We have done some printing and we don't need any
2432 further info to be printed.*/
2434 enum print_stop_action
2435 bpstat_print (bpstat bs
)
2439 /* Maybe another breakpoint in the chain caused us to stop.
2440 (Currently all watchpoints go on the bpstat whether hit or not.
2441 That probably could (should) be changed, provided care is taken
2442 with respect to bpstat_explains_signal). */
2443 for (; bs
; bs
= bs
->next
)
2445 val
= print_bp_stop_message (bs
);
2446 if (val
== PRINT_SRC_ONLY
2447 || val
== PRINT_SRC_AND_LOC
2448 || val
== PRINT_NOTHING
)
2452 /* We reached the end of the chain, or we got a null BS to start
2453 with and nothing was printed. */
2454 return PRINT_UNKNOWN
;
2457 /* Evaluate the expression EXP and return 1 if value is zero.
2458 This is used inside a catch_errors to evaluate the breakpoint condition.
2459 The argument is a "struct expression *" that has been cast to char * to
2460 make it pass through catch_errors. */
2463 breakpoint_cond_eval (void *exp
)
2465 struct value
*mark
= value_mark ();
2466 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2467 value_free_to_mark (mark
);
2471 /* Allocate a new bpstat and chain it to the current one. */
2474 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2478 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2480 bs
->breakpoint_at
= bl
;
2481 /* If the condition is false, etc., don't do the commands. */
2482 bs
->commands
= NULL
;
2484 bs
->print_it
= print_it_normal
;
2488 /* The target has stopped with waitstatus WS. Check if any hardware
2489 watchpoints have triggered, according to the target. */
2492 watchpoints_triggered (struct target_waitstatus
*ws
)
2494 int stopped_by_watchpoint
= STOPPED_BY_WATCHPOINT (*ws
);
2496 struct breakpoint
*b
;
2498 if (!stopped_by_watchpoint
)
2500 /* We were not stopped by a watchpoint. Mark all watchpoints
2501 as not triggered. */
2503 if (b
->type
== bp_hardware_watchpoint
2504 || b
->type
== bp_read_watchpoint
2505 || b
->type
== bp_access_watchpoint
)
2506 b
->watchpoint_triggered
= watch_triggered_no
;
2511 if (!target_stopped_data_address (¤t_target
, &addr
))
2513 /* We were stopped by a watchpoint, but we don't know where.
2514 Mark all watchpoints as unknown. */
2516 if (b
->type
== bp_hardware_watchpoint
2517 || b
->type
== bp_read_watchpoint
2518 || b
->type
== bp_access_watchpoint
)
2519 b
->watchpoint_triggered
= watch_triggered_unknown
;
2521 return stopped_by_watchpoint
;
2524 /* The target could report the data address. Mark watchpoints
2525 affected by this data address as triggered, and all others as not
2529 if (b
->type
== bp_hardware_watchpoint
2530 || b
->type
== bp_read_watchpoint
2531 || b
->type
== bp_access_watchpoint
)
2533 struct bp_location
*loc
;
2536 b
->watchpoint_triggered
= watch_triggered_no
;
2537 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2538 /* Exact match not required. Within range is
2540 if (addr
>= loc
->address
2541 && addr
< loc
->address
+ loc
->length
)
2543 b
->watchpoint_triggered
= watch_triggered_yes
;
2551 /* Possible return values for watchpoint_check (this can't be an enum
2552 because of check_errors). */
2553 /* The watchpoint has been deleted. */
2554 #define WP_DELETED 1
2555 /* The value has changed. */
2556 #define WP_VALUE_CHANGED 2
2557 /* The value has not changed. */
2558 #define WP_VALUE_NOT_CHANGED 3
2560 #define BP_TEMPFLAG 1
2561 #define BP_HARDWAREFLAG 2
2563 /* Check watchpoint condition. */
2566 watchpoint_check (void *p
)
2568 bpstat bs
= (bpstat
) p
;
2569 struct breakpoint
*b
;
2570 struct frame_info
*fr
;
2571 int within_current_scope
;
2573 b
= bs
->breakpoint_at
->owner
;
2575 if (b
->exp_valid_block
== NULL
)
2576 within_current_scope
= 1;
2579 /* There is no current frame at this moment. If we're going to have
2580 any chance of handling watchpoints on local variables, we'll need
2581 the frame chain (so we can determine if we're in scope). */
2582 reinit_frame_cache ();
2583 fr
= frame_find_by_id (b
->watchpoint_frame
);
2584 within_current_scope
= (fr
!= NULL
);
2586 /* If we've gotten confused in the unwinder, we might have
2587 returned a frame that can't describe this variable. */
2588 if (within_current_scope
2589 && block_function (b
->exp_valid_block
) != get_frame_function (fr
))
2590 within_current_scope
= 0;
2592 /* in_function_epilogue_p() returns a non-zero value if we're still
2593 in the function but the stack frame has already been invalidated.
2594 Since we can't rely on the values of local variables after the
2595 stack has been destroyed, we are treating the watchpoint in that
2596 state as `not changed' without further checking.
2598 vinschen/2003-09-04: The former implementation left out the case
2599 that the watchpoint frame couldn't be found by frame_find_by_id()
2600 because the current PC is currently in an epilogue. Calling
2601 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2602 if ((!within_current_scope
|| fr
== get_current_frame ())
2603 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2604 return WP_VALUE_NOT_CHANGED
;
2605 if (fr
&& within_current_scope
)
2606 /* If we end up stopping, the current frame will get selected
2607 in normal_stop. So this call to select_frame won't affect
2612 if (within_current_scope
)
2614 /* We use value_{,free_to_}mark because it could be a
2615 *long* time before we return to the command level and
2616 call free_all_values. We can't call free_all_values because
2617 we might be in the middle of evaluating a function call. */
2619 struct value
*mark
= value_mark ();
2620 struct value
*new_val
;
2622 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2623 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2624 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2626 if (new_val
!= NULL
)
2628 release_value (new_val
);
2629 value_free_to_mark (mark
);
2631 bs
->old_val
= b
->val
;
2634 /* We will stop here */
2635 return WP_VALUE_CHANGED
;
2639 /* Nothing changed, don't do anything. */
2640 value_free_to_mark (mark
);
2641 /* We won't stop here */
2642 return WP_VALUE_NOT_CHANGED
;
2647 /* This seems like the only logical thing to do because
2648 if we temporarily ignored the watchpoint, then when
2649 we reenter the block in which it is valid it contains
2650 garbage (in the case of a function, it may have two
2651 garbage values, one before and one after the prologue).
2652 So we can't even detect the first assignment to it and
2653 watch after that (since the garbage may or may not equal
2654 the first value assigned). */
2655 /* We print all the stop information in print_it_typical(), but
2656 in this case, by the time we call print_it_typical() this bp
2657 will be deleted already. So we have no choice but print the
2658 information here. */
2659 if (ui_out_is_mi_like_p (uiout
))
2661 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2662 ui_out_text (uiout
, "\nWatchpoint ");
2663 ui_out_field_int (uiout
, "wpnum", b
->number
);
2664 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2665 which its expression is valid.\n");
2667 if (b
->related_breakpoint
)
2668 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2669 b
->disposition
= disp_del_at_next_stop
;
2675 /* Get a bpstat associated with having just stopped at address
2676 BP_ADDR in thread PTID.
2678 Determine whether we stopped at a breakpoint, etc, or whether we
2679 don't understand this stop. Result is a chain of bpstat's such that:
2681 if we don't understand the stop, the result is a null pointer.
2683 if we understand why we stopped, the result is not null.
2685 Each element of the chain refers to a particular breakpoint or
2686 watchpoint at which we have stopped. (We may have stopped for
2687 several reasons concurrently.)
2689 Each element of the chain has valid next, breakpoint_at,
2690 commands, FIXME??? fields. */
2693 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
2695 struct breakpoint
*b
= NULL
;
2696 const struct bp_location
*bl
;
2697 /* Root of the chain of bpstat's */
2698 struct bpstats root_bs
[1];
2699 /* Pointer to the last thing in the chain currently. */
2700 bpstat bs
= root_bs
;
2701 int thread_id
= pid_to_thread_id (ptid
);
2703 ALL_BP_LOCATIONS (bl
)
2707 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2710 if (b
->type
!= bp_watchpoint
2711 && b
->type
!= bp_hardware_watchpoint
2712 && b
->type
!= bp_read_watchpoint
2713 && b
->type
!= bp_access_watchpoint
2714 && b
->type
!= bp_hardware_breakpoint
2715 && b
->type
!= bp_catch_fork
2716 && b
->type
!= bp_catch_vfork
2717 && b
->type
!= bp_catch_exec
) /* a non-watchpoint bp */
2719 if (bl
->address
!= bp_addr
) /* address doesn't match */
2721 if (overlay_debugging
/* unmapped overlay section */
2722 && section_is_overlay (bl
->section
)
2723 && !section_is_mapped (bl
->section
))
2727 /* Continuable hardware watchpoints are treated as non-existent if the
2728 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2729 some data address). Otherwise gdb won't stop on a break instruction
2730 in the code (not from a breakpoint) when a hardware watchpoint has
2731 been defined. Also skip watchpoints which we know did not trigger
2732 (did not match the data address). */
2734 if ((b
->type
== bp_hardware_watchpoint
2735 || b
->type
== bp_read_watchpoint
2736 || b
->type
== bp_access_watchpoint
)
2737 && b
->watchpoint_triggered
== watch_triggered_no
)
2740 if (b
->type
== bp_hardware_breakpoint
)
2742 if (bl
->address
!= bp_addr
)
2744 if (overlay_debugging
/* unmapped overlay section */
2745 && section_is_overlay (bl
->section
)
2746 && !section_is_mapped (bl
->section
))
2750 /* Is this a catchpoint of a load or unload? If so, did we
2751 get a load or unload of the specified library? If not,
2753 if ((b
->type
== bp_catch_load
)
2754 #if defined(SOLIB_HAVE_LOAD_EVENT)
2755 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2756 || ((b
->dll_pathname
!= NULL
)
2757 && (strcmp (b
->dll_pathname
,
2758 SOLIB_LOADED_LIBRARY_PATHNAME (
2759 PIDGET (inferior_ptid
)))
2765 if ((b
->type
== bp_catch_unload
)
2766 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2767 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2768 || ((b
->dll_pathname
!= NULL
)
2769 && (strcmp (b
->dll_pathname
,
2770 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2771 PIDGET (inferior_ptid
)))
2777 if ((b
->type
== bp_catch_fork
)
2778 && !inferior_has_forked (PIDGET (inferior_ptid
),
2779 &b
->forked_inferior_pid
))
2782 if ((b
->type
== bp_catch_vfork
)
2783 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2784 &b
->forked_inferior_pid
))
2787 if ((b
->type
== bp_catch_exec
)
2788 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2791 /* For hardware watchpoints, we look only at the first location.
2792 The watchpoint_check function will work on entire expression,
2793 not the individual locations. For read watchopints, the
2794 watchpoints_triggered function have checked all locations
2797 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
2800 /* Come here if it's a watchpoint, or if the break address matches */
2802 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
2804 /* Watchpoints may change this, if not found to have triggered. */
2808 if (b
->type
== bp_watchpoint
2809 || b
->type
== bp_read_watchpoint
2810 || b
->type
== bp_access_watchpoint
2811 || b
->type
== bp_hardware_watchpoint
)
2815 int must_check_value
= 0;
2817 if (b
->type
== bp_watchpoint
)
2818 /* For a software watchpoint, we must always check the
2820 must_check_value
= 1;
2821 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2822 /* We have a hardware watchpoint (read, write, or access)
2823 and the target earlier reported an address watched by
2825 must_check_value
= 1;
2826 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2827 && b
->type
== bp_hardware_watchpoint
)
2828 /* We were stopped by a hardware watchpoint, but the target could
2829 not report the data address. We must check the watchpoint's
2830 value. Access and read watchpoints are out of luck; without
2831 a data address, we can't figure it out. */
2832 must_check_value
= 1;
2834 if (must_check_value
)
2836 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2838 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2839 int e
= catch_errors (watchpoint_check
, bs
, message
,
2841 do_cleanups (cleanups
);
2845 /* We've already printed what needs to be printed. */
2846 bs
->print_it
= print_it_done
;
2849 case WP_VALUE_CHANGED
:
2850 if (b
->type
== bp_read_watchpoint
)
2852 /* Don't stop: read watchpoints shouldn't fire if
2853 the value has changed. This is for targets
2854 which cannot set read-only watchpoints. */
2855 bs
->print_it
= print_it_noop
;
2861 case WP_VALUE_NOT_CHANGED
:
2862 if (b
->type
== bp_hardware_watchpoint
2863 || b
->type
== bp_watchpoint
)
2865 /* Don't stop: write watchpoints shouldn't fire if
2866 the value hasn't changed. */
2867 bs
->print_it
= print_it_noop
;
2877 /* Error from catch_errors. */
2878 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2879 if (b
->related_breakpoint
)
2880 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2881 b
->disposition
= disp_del_at_next_stop
;
2882 /* We've already printed what needs to be printed. */
2883 bs
->print_it
= print_it_done
;
2887 else /* must_check_value == 0 */
2889 /* This is a case where some watchpoint(s) triggered, but
2890 not at the address of this watchpoint, or else no
2891 watchpoint triggered after all. So don't print
2892 anything for this watchpoint. */
2893 bs
->print_it
= print_it_noop
;
2900 /* By definition, an encountered breakpoint is a triggered
2905 if (frame_id_p (b
->frame_id
)
2906 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2910 int value_is_zero
= 0;
2912 /* If this is a scope breakpoint, mark the associated
2913 watchpoint as triggered so that we will handle the
2914 out-of-scope event. We'll get to the watchpoint next
2916 if (b
->type
== bp_watchpoint_scope
)
2917 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
2919 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
2921 /* Need to select the frame, with all that implies
2922 so that the conditions will have the right context. */
2923 select_frame (get_current_frame ());
2925 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
2926 "Error in testing breakpoint condition:\n",
2928 /* FIXME-someday, should give breakpoint # */
2931 if (bl
->cond
&& value_is_zero
)
2934 /* Don't consider this a hit. */
2937 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2940 /* Don't consider this a hit. */
2943 else if (b
->ignore_count
> 0)
2946 annotate_ignore_count_change ();
2949 else if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
2950 /* We do not stop for these. */
2954 /* We will stop here */
2955 if (b
->disposition
== disp_disable
)
2956 b
->enable_state
= bp_disabled
;
2959 bs
->commands
= b
->commands
;
2961 (strcmp ("silent", bs
->commands
->line
) == 0
2962 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2964 bs
->commands
= bs
->commands
->next
;
2967 bs
->commands
= copy_command_lines (bs
->commands
);
2970 /* Print nothing for this entry if we dont stop or if we dont print. */
2971 if (bs
->stop
== 0 || bs
->print
== 0)
2972 bs
->print_it
= print_it_noop
;
2975 bs
->next
= NULL
; /* Terminate the chain */
2976 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2978 /* If we aren't stopping, the value of some hardware watchpoint may
2979 not have changed, but the intermediate memory locations we are
2980 watching may have. Don't bother if we're stopping; this will get
2982 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
2987 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
2989 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
2990 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
2991 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
2993 /* remove/insert can invalidate bs->breakpoint_at, if this
2994 location is no longer used by the watchpoint. Prevent
2995 further code from trying to use it. */
2996 bs
->breakpoint_at
= NULL
;
2997 remove_breakpoints ();
2998 insert_breakpoints ();
3002 return root_bs
->next
;
3005 /* Tell what to do about this bpstat. */
3007 bpstat_what (bpstat bs
)
3009 /* Classify each bpstat as one of the following. */
3012 /* This bpstat element has no effect on the main_action. */
3015 /* There was a watchpoint, stop but don't print. */
3018 /* There was a watchpoint, stop and print. */
3021 /* There was a breakpoint but we're not stopping. */
3024 /* There was a breakpoint, stop but don't print. */
3027 /* There was a breakpoint, stop and print. */
3030 /* We hit the longjmp breakpoint. */
3033 /* We hit the longjmp_resume breakpoint. */
3036 /* We hit the step_resume breakpoint. */
3039 /* We hit the shared library event breakpoint. */
3042 /* We caught a shared library event. */
3045 /* This is just used to count how many enums there are. */
3049 /* Here is the table which drives this routine. So that we can
3050 format it pretty, we define some abbreviations for the
3051 enum bpstat_what codes. */
3052 #define kc BPSTAT_WHAT_KEEP_CHECKING
3053 #define ss BPSTAT_WHAT_STOP_SILENT
3054 #define sn BPSTAT_WHAT_STOP_NOISY
3055 #define sgl BPSTAT_WHAT_SINGLE
3056 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3057 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3058 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
3059 #define sr BPSTAT_WHAT_STEP_RESUME
3060 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3061 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
3063 /* "Can't happen." Might want to print an error message.
3064 abort() is not out of the question, but chances are GDB is just
3065 a bit confused, not unusable. */
3066 #define err BPSTAT_WHAT_STOP_NOISY
3068 /* Given an old action and a class, come up with a new action. */
3069 /* One interesting property of this table is that wp_silent is the same
3070 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3071 after stopping, the check for whether to step over a breakpoint
3072 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3073 reference to how we stopped. We retain separate wp_silent and
3074 bp_silent codes in case we want to change that someday.
3076 Another possibly interesting property of this table is that
3077 there's a partial ordering, priority-like, of the actions. Once
3078 you've decided that some action is appropriate, you'll never go
3079 back and decide something of a lower priority is better. The
3082 kc < clr sgl shl shlr slr sn sr ss
3083 sgl < clrs shl shlr slr sn sr ss
3084 slr < err shl shlr sn sr ss
3085 clr < clrs err shl shlr sn sr ss
3086 clrs < err shl shlr sn sr ss
3093 What I think this means is that we don't need a damned table
3094 here. If you just put the rows and columns in the right order,
3095 it'd look awfully regular. We could simply walk the bpstat list
3096 and choose the highest priority action we find, with a little
3097 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
3098 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
3099 is messy anyway). */
3101 /* step_resume entries: a step resume breakpoint overrides another
3102 breakpoint of signal handling (see comment in wait_for_inferior
3103 at where we set the step_resume breakpoint). */
3105 static const enum bpstat_what_main_action
3106 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3109 /* kc ss sn sgl slr clr clrs sr shl shlr
3112 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, shl
, shlr
},
3114 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, shl
, shlr
},
3116 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3118 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, shl
, shlr
},
3120 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, shl
, shlr
},
3122 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3124 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, shl
, shlr
},
3126 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, shl
, shlr
},
3128 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3130 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
, shlr
},
3132 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, sr
, shlr
, shlr
}
3147 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3148 struct bpstat_what retval
;
3150 retval
.call_dummy
= 0;
3151 for (; bs
!= NULL
; bs
= bs
->next
)
3153 enum class bs_class
= no_effect
;
3154 if (bs
->breakpoint_at
== NULL
)
3155 /* I suspect this can happen if it was a momentary breakpoint
3156 which has since been deleted. */
3158 switch (bs
->breakpoint_at
->owner
->type
)
3164 case bp_hardware_breakpoint
:
3170 bs_class
= bp_noisy
;
3172 bs_class
= bp_silent
;
3175 bs_class
= bp_nostop
;
3178 case bp_hardware_watchpoint
:
3179 case bp_read_watchpoint
:
3180 case bp_access_watchpoint
:
3184 bs_class
= wp_noisy
;
3186 bs_class
= wp_silent
;
3189 /* There was a watchpoint, but we're not stopping.
3190 This requires no further action. */
3191 bs_class
= no_effect
;
3194 bs_class
= long_jump
;
3196 case bp_longjmp_resume
:
3197 bs_class
= long_resume
;
3199 case bp_step_resume
:
3202 bs_class
= step_resume
;
3205 /* It is for the wrong frame. */
3206 bs_class
= bp_nostop
;
3208 case bp_watchpoint_scope
:
3209 bs_class
= bp_nostop
;
3211 case bp_shlib_event
:
3212 bs_class
= shlib_event
;
3214 case bp_thread_event
:
3215 case bp_overlay_event
:
3216 bs_class
= bp_nostop
;
3219 case bp_catch_unload
:
3220 /* Only if this catchpoint triggered should we cause the
3221 step-out-of-dld behaviour. Otherwise, we ignore this
3224 bs_class
= catch_shlib_event
;
3226 bs_class
= no_effect
;
3229 case bp_catch_vfork
:
3234 bs_class
= bp_noisy
;
3236 bs_class
= bp_silent
;
3239 /* There was a catchpoint, but we're not stopping.
3240 This requires no further action. */
3241 bs_class
= no_effect
;
3244 /* Make sure the action is stop (silent or noisy),
3245 so infrun.c pops the dummy frame. */
3246 bs_class
= bp_silent
;
3247 retval
.call_dummy
= 1;
3250 current_action
= table
[(int) bs_class
][(int) current_action
];
3252 retval
.main_action
= current_action
;
3256 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3257 without hardware support). This isn't related to a specific bpstat,
3258 just to things like whether watchpoints are set. */
3261 bpstat_should_step (void)
3263 struct breakpoint
*b
;
3265 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3272 /* Given a bpstat that records zero or more triggered eventpoints, this
3273 function returns another bpstat which contains only the catchpoints
3274 on that first list, if any. */
3276 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3278 struct bpstats root_bs
[1];
3279 bpstat bs
= root_bs
;
3280 struct breakpoint
*ep
;
3283 bpstat_clear (cp_list
);
3284 root_bs
->next
= NULL
;
3286 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3288 /* Is this eventpoint a catchpoint? If not, ignore it. */
3289 ep
= ep_list
->breakpoint_at
->owner
;
3292 if ((ep
->type
!= bp_catch_load
) &&
3293 (ep
->type
!= bp_catch_unload
))
3294 /* pai: (temp) ADD fork/vfork here!! */
3297 /* Yes; add it to the list. */
3298 bs
= bpstat_alloc (ep_list
->breakpoint_at
, bs
);
3303 #if defined(SOLIB_ADD)
3304 /* Also, for each triggered catchpoint, tag it with the name of
3305 the library that caused this trigger. (We copy the name now,
3306 because it's only guaranteed to be available NOW, when the
3307 catchpoint triggers. Clients who may wish to know the name
3308 later must get it from the catchpoint itself.) */
3309 if (ep
->triggered_dll_pathname
!= NULL
)
3310 xfree (ep
->triggered_dll_pathname
);
3311 if (ep
->type
== bp_catch_load
)
3312 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3313 PIDGET (inferior_ptid
));
3315 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3316 PIDGET (inferior_ptid
));
3318 dll_pathname
= NULL
;
3322 ep
->triggered_dll_pathname
= (char *)
3323 xmalloc (strlen (dll_pathname
) + 1);
3324 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3327 ep
->triggered_dll_pathname
= NULL
;
3333 static void print_breakpoint_location (struct breakpoint
*b
,
3334 struct bp_location
*loc
,
3336 struct ui_stream
*stb
)
3341 = find_pc_sect_function (loc
->address
, loc
->section
);
3344 ui_out_text (uiout
, "in ");
3345 ui_out_field_string (uiout
, "func",
3346 SYMBOL_PRINT_NAME (sym
));
3347 ui_out_wrap_hint (uiout
, wrap_indent
);
3348 ui_out_text (uiout
, " at ");
3350 ui_out_field_string (uiout
, "file", b
->source_file
);
3351 ui_out_text (uiout
, ":");
3353 if (ui_out_is_mi_like_p (uiout
))
3355 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3356 char *fullname
= symtab_to_fullname (sal
.symtab
);
3359 ui_out_field_string (uiout
, "fullname", fullname
);
3362 ui_out_field_int (uiout
, "line", b
->line_number
);
3366 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3370 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3371 ui_out_field_stream (uiout
, "at", stb
);
3375 /* Print B to gdb_stdout. */
3377 print_one_breakpoint_location (struct breakpoint
*b
,
3378 struct bp_location
*loc
,
3380 CORE_ADDR
*last_addr
)
3382 struct command_line
*l
;
3384 struct ep_type_description
3389 static struct ep_type_description bptypes
[] =
3391 {bp_none
, "?deleted?"},
3392 {bp_breakpoint
, "breakpoint"},
3393 {bp_hardware_breakpoint
, "hw breakpoint"},
3394 {bp_until
, "until"},
3395 {bp_finish
, "finish"},
3396 {bp_watchpoint
, "watchpoint"},
3397 {bp_hardware_watchpoint
, "hw watchpoint"},
3398 {bp_read_watchpoint
, "read watchpoint"},
3399 {bp_access_watchpoint
, "acc watchpoint"},
3400 {bp_longjmp
, "longjmp"},
3401 {bp_longjmp_resume
, "longjmp resume"},
3402 {bp_step_resume
, "step resume"},
3403 {bp_watchpoint_scope
, "watchpoint scope"},
3404 {bp_call_dummy
, "call dummy"},
3405 {bp_shlib_event
, "shlib events"},
3406 {bp_thread_event
, "thread events"},
3407 {bp_overlay_event
, "overlay events"},
3408 {bp_catch_load
, "catch load"},
3409 {bp_catch_unload
, "catch unload"},
3410 {bp_catch_fork
, "catch fork"},
3411 {bp_catch_vfork
, "catch vfork"},
3412 {bp_catch_exec
, "catch exec"}
3415 static char *bpdisps
[] =
3416 {"del", "dstp", "dis", "keep"};
3417 static char bpenables
[] = "nynny";
3418 char wrap_indent
[80];
3419 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3420 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3421 struct cleanup
*bkpt_chain
;
3423 int header_of_multiple
= 0;
3424 int part_of_multiple
= (loc
!= NULL
);
3426 gdb_assert (!loc
|| loc_number
!= 0);
3427 /* See comment in print_one_breakpoint concerning
3428 treatment of breakpoints with single disabled
3432 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3433 header_of_multiple
= 1;
3438 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3442 if (part_of_multiple
)
3445 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3446 ui_out_field_string (uiout
, "number", formatted
);
3451 ui_out_field_int (uiout
, "number", b
->number
);
3456 if (part_of_multiple
)
3457 ui_out_field_skip (uiout
, "type");
3460 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3461 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3462 internal_error (__FILE__
, __LINE__
,
3463 _("bptypes table does not describe type #%d."),
3465 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3470 if (part_of_multiple
)
3471 ui_out_field_skip (uiout
, "disp");
3473 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3478 if (part_of_multiple
)
3479 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3481 ui_out_field_fmt (uiout
, "enabled", "%c",
3482 bpenables
[(int) b
->enable_state
]);
3483 ui_out_spaces (uiout
, 2);
3487 strcpy (wrap_indent
, " ");
3490 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3491 strcat (wrap_indent
, " ");
3493 strcat (wrap_indent
, " ");
3496 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3498 /* Although the print_one can possibly print
3499 all locations, calling it here is not likely
3500 to get any nice result. So, make sure there's
3501 just one location. */
3502 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3503 b
->ops
->print_one (b
, last_addr
);
3509 internal_error (__FILE__
, __LINE__
,
3510 _("print_one_breakpoint: bp_none encountered\n"));
3514 case bp_hardware_watchpoint
:
3515 case bp_read_watchpoint
:
3516 case bp_access_watchpoint
:
3517 /* Field 4, the address, is omitted (which makes the columns
3518 not line up too nicely with the headers, but the effect
3519 is relatively readable). */
3521 ui_out_field_skip (uiout
, "addr");
3523 print_expression (b
->exp
, stb
->stream
);
3524 ui_out_field_stream (uiout
, "what", stb
);
3528 case bp_catch_unload
:
3529 /* Field 4, the address, is omitted (which makes the columns
3530 not line up too nicely with the headers, but the effect
3531 is relatively readable). */
3533 ui_out_field_skip (uiout
, "addr");
3535 if (b
->dll_pathname
== NULL
)
3537 ui_out_field_string (uiout
, "what", "<any library>");
3538 ui_out_spaces (uiout
, 1);
3542 ui_out_text (uiout
, "library \"");
3543 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3544 ui_out_text (uiout
, "\" ");
3549 case bp_catch_vfork
:
3550 /* Field 4, the address, is omitted (which makes the columns
3551 not line up too nicely with the headers, but the effect
3552 is relatively readable). */
3554 ui_out_field_skip (uiout
, "addr");
3556 if (b
->forked_inferior_pid
!= 0)
3558 ui_out_text (uiout
, "process ");
3559 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3560 ui_out_spaces (uiout
, 1);
3565 /* Field 4, the address, is omitted (which makes the columns
3566 not line up too nicely with the headers, but the effect
3567 is relatively readable). */
3569 ui_out_field_skip (uiout
, "addr");
3571 if (b
->exec_pathname
!= NULL
)
3573 ui_out_text (uiout
, "program \"");
3574 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3575 ui_out_text (uiout
, "\" ");
3580 case bp_hardware_breakpoint
:
3584 case bp_longjmp_resume
:
3585 case bp_step_resume
:
3586 case bp_watchpoint_scope
:
3588 case bp_shlib_event
:
3589 case bp_thread_event
:
3590 case bp_overlay_event
:
3594 if (header_of_multiple
)
3595 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3596 if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3597 ui_out_field_string (uiout
, "addr", "<PENDING>");
3599 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3602 if (!header_of_multiple
)
3603 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3605 *last_addr
= b
->loc
->address
;
3609 if (!part_of_multiple
&& b
->thread
!= -1)
3611 /* FIXME: This seems to be redundant and lost here; see the
3612 "stop only in" line a little further down. */
3613 ui_out_text (uiout
, " thread ");
3614 ui_out_field_int (uiout
, "thread", b
->thread
);
3617 ui_out_text (uiout
, "\n");
3619 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3622 ui_out_text (uiout
, "\tstop only in stack frame at ");
3623 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3625 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3626 ui_out_text (uiout
, "\n");
3629 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3631 /* We do not print the condition for Ada exception catchpoints
3632 because the condition is an internal implementation detail
3633 that we do not want to expose to the user. */
3635 ui_out_text (uiout
, "\tstop only if ");
3636 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3637 ui_out_text (uiout
, "\n");
3640 if (!part_of_multiple
&& b
->thread
!= -1)
3642 /* FIXME should make an annotation for this */
3643 ui_out_text (uiout
, "\tstop only in thread ");
3644 ui_out_field_int (uiout
, "thread", b
->thread
);
3645 ui_out_text (uiout
, "\n");
3648 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
)
3650 /* FIXME should make an annotation for this */
3651 if (ep_is_catchpoint (b
))
3652 ui_out_text (uiout
, "\tcatchpoint");
3654 ui_out_text (uiout
, "\tbreakpoint");
3655 ui_out_text (uiout
, " already hit ");
3656 ui_out_field_int (uiout
, "times", b
->hit_count
);
3657 if (b
->hit_count
== 1)
3658 ui_out_text (uiout
, " time\n");
3660 ui_out_text (uiout
, " times\n");
3663 /* Output the count also if it is zero, but only if this is
3664 mi. FIXME: Should have a better test for this. */
3665 if (ui_out_is_mi_like_p (uiout
))
3666 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3667 ui_out_field_int (uiout
, "times", b
->hit_count
);
3669 if (!part_of_multiple
&& b
->ignore_count
)
3672 ui_out_text (uiout
, "\tignore next ");
3673 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3674 ui_out_text (uiout
, " hits\n");
3677 if (!part_of_multiple
&& (l
= b
->commands
))
3679 struct cleanup
*script_chain
;
3682 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3683 print_command_lines (uiout
, l
, 4);
3684 do_cleanups (script_chain
);
3686 do_cleanups (bkpt_chain
);
3687 do_cleanups (old_chain
);
3691 print_one_breakpoint (struct breakpoint
*b
,
3692 CORE_ADDR
*last_addr
)
3694 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3696 /* If this breakpoint has custom print function,
3697 it's already printed. Otherwise, print individual
3698 locations, if any. */
3699 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3701 /* If breakpoint has a single location that is
3702 disabled, we print it as if it had
3703 several locations, since otherwise it's hard to
3704 represent "breakpoint enabled, location disabled"
3706 Note that while hardware watchpoints have
3707 several locations internally, that's no a property
3710 && !is_hardware_watchpoint (b
)
3711 && (b
->loc
->next
|| !b
->loc
->enabled
)
3712 && !ui_out_is_mi_like_p (uiout
))
3714 struct bp_location
*loc
;
3716 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3717 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3723 struct captured_breakpoint_query_args
3729 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3731 struct captured_breakpoint_query_args
*args
= data
;
3732 struct breakpoint
*b
;
3733 CORE_ADDR dummy_addr
= 0;
3736 if (args
->bnum
== b
->number
)
3738 print_one_breakpoint (b
, &dummy_addr
);
3746 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3748 struct captured_breakpoint_query_args args
;
3750 /* For the moment we don't trust print_one_breakpoint() to not throw
3752 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3753 error_message
, RETURN_MASK_ALL
) < 0)
3759 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3760 catchpoints, et.al.). */
3763 user_settable_breakpoint (const struct breakpoint
*b
)
3765 return (b
->type
== bp_breakpoint
3766 || b
->type
== bp_catch_load
3767 || b
->type
== bp_catch_unload
3768 || b
->type
== bp_catch_fork
3769 || b
->type
== bp_catch_vfork
3770 || b
->type
== bp_catch_exec
3771 || b
->type
== bp_hardware_breakpoint
3772 || b
->type
== bp_watchpoint
3773 || b
->type
== bp_read_watchpoint
3774 || b
->type
== bp_access_watchpoint
3775 || b
->type
== bp_hardware_watchpoint
);
3778 /* Print information on user settable breakpoint (watchpoint, etc)
3779 number BNUM. If BNUM is -1 print all user settable breakpoints.
3780 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3783 breakpoint_1 (int bnum
, int allflag
)
3785 struct breakpoint
*b
;
3786 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3787 int nr_printable_breakpoints
;
3788 struct cleanup
*bkpttbl_chain
;
3790 /* Compute the number of rows in the table. */
3791 nr_printable_breakpoints
= 0;
3794 || bnum
== b
->number
)
3796 if (allflag
|| user_settable_breakpoint (b
))
3797 nr_printable_breakpoints
++;
3802 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3806 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3809 if (nr_printable_breakpoints
> 0)
3810 annotate_breakpoints_headers ();
3811 if (nr_printable_breakpoints
> 0)
3813 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3814 if (nr_printable_breakpoints
> 0)
3816 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3817 if (nr_printable_breakpoints
> 0)
3819 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3820 if (nr_printable_breakpoints
> 0)
3822 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3825 if (nr_printable_breakpoints
> 0)
3827 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3828 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3830 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3832 if (nr_printable_breakpoints
> 0)
3834 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3835 ui_out_table_body (uiout
);
3836 if (nr_printable_breakpoints
> 0)
3837 annotate_breakpoints_table ();
3841 || bnum
== b
->number
)
3843 /* We only print out user settable breakpoints unless the
3845 if (allflag
|| user_settable_breakpoint (b
))
3846 print_one_breakpoint (b
, &last_addr
);
3849 do_cleanups (bkpttbl_chain
);
3851 if (nr_printable_breakpoints
== 0)
3854 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3856 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3861 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3862 that a comparison of an unsigned with -1 is always false. */
3863 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3864 set_next_address (last_addr
);
3867 /* FIXME? Should this be moved up so that it is only called when
3868 there have been breakpoints? */
3869 annotate_breakpoints_table_end ();
3873 breakpoints_info (char *bnum_exp
, int from_tty
)
3878 bnum
= parse_and_eval_long (bnum_exp
);
3880 breakpoint_1 (bnum
, 0);
3884 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3889 bnum
= parse_and_eval_long (bnum_exp
);
3891 breakpoint_1 (bnum
, 1);
3895 breakpoint_has_pc (struct breakpoint
*b
, CORE_ADDR pc
, asection
*section
)
3897 struct bp_location
*bl
= b
->loc
;
3898 for (; bl
; bl
= bl
->next
)
3900 if (bl
->address
== pc
3901 && (!overlay_debugging
|| bl
->section
== section
))
3907 /* Print a message describing any breakpoints set at PC. */
3910 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
, int thread
)
3913 struct breakpoint
*b
;
3916 others
+= breakpoint_has_pc (b
, pc
, section
);
3920 printf_filtered (_("Note: breakpoint "));
3921 else /* if (others == ???) */
3922 printf_filtered (_("Note: breakpoints "));
3924 if (breakpoint_has_pc (b
, pc
, section
))
3927 printf_filtered ("%d", b
->number
);
3928 if (b
->thread
== -1 && thread
!= -1)
3929 printf_filtered (" (all threads)");
3930 else if (b
->thread
!= -1)
3931 printf_filtered (" (thread %d)", b
->thread
);
3932 printf_filtered ("%s%s ",
3933 ((b
->enable_state
== bp_disabled
||
3934 b
->enable_state
== bp_call_disabled
)
3936 : b
->enable_state
== bp_permanent
3940 : ((others
== 1) ? " and" : ""));
3942 printf_filtered (_("also set at pc "));
3943 fputs_filtered (paddress (pc
), gdb_stdout
);
3944 printf_filtered (".\n");
3948 /* Set the default place to put a breakpoint
3949 for the `break' command with no arguments. */
3952 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3955 default_breakpoint_valid
= valid
;
3956 default_breakpoint_address
= addr
;
3957 default_breakpoint_symtab
= symtab
;
3958 default_breakpoint_line
= line
;
3961 /* Return true iff it is meaningful to use the address member of
3962 BPT. For some breakpoint types, the address member is irrelevant
3963 and it makes no sense to attempt to compare it to other addresses
3964 (or use it for any other purpose either).
3966 More specifically, each of the following breakpoint types will always
3967 have a zero valued address and we don't want check_duplicates() to mark
3968 breakpoints of any of these types to be a duplicate of an actual
3969 breakpoint at address zero:
3972 bp_hardware_watchpoint
3974 bp_access_watchpoint
3981 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3983 enum bptype type
= bpt
->type
;
3985 return (type
!= bp_watchpoint
3986 && type
!= bp_hardware_watchpoint
3987 && type
!= bp_read_watchpoint
3988 && type
!= bp_access_watchpoint
3989 && type
!= bp_catch_exec
3990 && type
!= bp_longjmp_resume
3991 && type
!= bp_catch_fork
3992 && type
!= bp_catch_vfork
);
3995 /* Rescan breakpoints at the same address and section as BPT,
3996 marking the first one as "first" and any others as "duplicates".
3997 This is so that the bpt instruction is only inserted once.
3998 If we have a permanent breakpoint at the same place as BPT, make
3999 that one the official one, and the rest as duplicates. */
4002 check_duplicates_for (CORE_ADDR address
, asection
*section
)
4004 struct bp_location
*b
;
4006 struct bp_location
*perm_bp
= 0;
4008 ALL_BP_LOCATIONS (b
)
4009 if (b
->owner
->enable_state
!= bp_disabled
4010 && b
->owner
->enable_state
!= bp_call_disabled
4012 && !b
->shlib_disabled
4013 && b
->address
== address
/* address / overlay match */
4014 && (!overlay_debugging
|| b
->section
== section
)
4015 && breakpoint_address_is_meaningful (b
->owner
))
4017 /* Have we found a permanent breakpoint? */
4018 if (b
->owner
->enable_state
== bp_permanent
)
4025 b
->duplicate
= count
> 1;
4028 /* If we found a permanent breakpoint at this address, go over the
4029 list again and declare all the other breakpoints there to be the
4033 perm_bp
->duplicate
= 0;
4035 /* Permanent breakpoint should always be inserted. */
4036 if (! perm_bp
->inserted
)
4037 internal_error (__FILE__
, __LINE__
,
4038 _("allegedly permanent breakpoint is not "
4039 "actually inserted"));
4041 ALL_BP_LOCATIONS (b
)
4044 if (b
->owner
->enable_state
!= bp_disabled
4045 && b
->owner
->enable_state
!= bp_call_disabled
4046 && b
->enabled
&& !b
->shlib_disabled
4047 && b
->address
== address
/* address / overlay match */
4048 && (!overlay_debugging
|| b
->section
== section
)
4049 && breakpoint_address_is_meaningful (b
->owner
))
4052 internal_error (__FILE__
, __LINE__
,
4053 _("another breakpoint was inserted on top of "
4054 "a permanent breakpoint"));
4063 check_duplicates (struct breakpoint
*bpt
)
4065 struct bp_location
*bl
= bpt
->loc
;
4067 if (! breakpoint_address_is_meaningful (bpt
))
4070 for (; bl
; bl
= bl
->next
)
4071 check_duplicates_for (bl
->address
, bl
->section
);
4075 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4076 int bnum
, int have_bnum
)
4081 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4082 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4084 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4085 bnum
, astr1
, astr2
);
4087 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4090 /* Adjust a breakpoint's address to account for architectural constraints
4091 on breakpoint placement. Return the adjusted address. Note: Very
4092 few targets require this kind of adjustment. For most targets,
4093 this function is simply the identity function. */
4096 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4098 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4100 /* Very few targets need any kind of breakpoint adjustment. */
4103 else if (bptype
== bp_watchpoint
4104 || bptype
== bp_hardware_watchpoint
4105 || bptype
== bp_read_watchpoint
4106 || bptype
== bp_access_watchpoint
4107 || bptype
== bp_catch_fork
4108 || bptype
== bp_catch_vfork
4109 || bptype
== bp_catch_exec
)
4111 /* Watchpoints and the various bp_catch_* eventpoints should not
4112 have their addresses modified. */
4117 CORE_ADDR adjusted_bpaddr
;
4119 /* Some targets have architectural constraints on the placement
4120 of breakpoint instructions. Obtain the adjusted address. */
4121 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4124 /* An adjusted breakpoint address can significantly alter
4125 a user's expectations. Print a warning if an adjustment
4127 if (adjusted_bpaddr
!= bpaddr
)
4128 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4130 return adjusted_bpaddr
;
4134 /* Allocate a struct bp_location. */
4136 static struct bp_location
*
4137 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
4139 struct bp_location
*loc
, *loc_p
;
4141 loc
= xmalloc (sizeof (struct bp_location
));
4142 memset (loc
, 0, sizeof (*loc
));
4146 loc
->shlib_disabled
= 0;
4155 case bp_longjmp_resume
:
4156 case bp_step_resume
:
4157 case bp_watchpoint_scope
:
4159 case bp_shlib_event
:
4160 case bp_thread_event
:
4161 case bp_overlay_event
:
4163 case bp_catch_unload
:
4164 loc
->loc_type
= bp_loc_software_breakpoint
;
4166 case bp_hardware_breakpoint
:
4167 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4169 case bp_hardware_watchpoint
:
4170 case bp_read_watchpoint
:
4171 case bp_access_watchpoint
:
4172 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4176 case bp_catch_vfork
:
4178 loc
->loc_type
= bp_loc_other
;
4181 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4184 /* Add this breakpoint to the end of the chain. */
4186 loc_p
= bp_location_chain
;
4188 bp_location_chain
= loc
;
4191 while (loc_p
->global_next
)
4192 loc_p
= loc_p
->global_next
;
4193 loc_p
->global_next
= loc
;
4199 static void free_bp_location (struct bp_location
*loc
)
4206 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4207 that has type BPTYPE and has no locations as yet. */
4209 static struct breakpoint
*
4210 set_raw_breakpoint_without_location (enum bptype bptype
)
4212 struct breakpoint
*b
, *b1
;
4214 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4215 memset (b
, 0, sizeof (*b
));
4218 b
->language
= current_language
->la_language
;
4219 b
->input_radix
= input_radix
;
4221 b
->enable_state
= bp_enabled
;
4224 b
->ignore_count
= 0;
4226 b
->frame_id
= null_frame_id
;
4227 b
->dll_pathname
= NULL
;
4228 b
->triggered_dll_pathname
= NULL
;
4229 b
->forked_inferior_pid
= 0;
4230 b
->exec_pathname
= NULL
;
4232 b
->condition_not_parsed
= 0;
4234 /* Add this breakpoint to the end of the chain
4235 so that a list of breakpoints will come out in order
4236 of increasing numbers. */
4238 b1
= breakpoint_chain
;
4240 breakpoint_chain
= b
;
4250 /* Initialize loc->function_name. */
4252 set_breakpoint_location_function (struct bp_location
*loc
)
4254 if (loc
->owner
->type
== bp_breakpoint
4255 || loc
->owner
->type
== bp_hardware_breakpoint
)
4257 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4259 if (loc
->function_name
)
4260 loc
->function_name
= xstrdup (loc
->function_name
);
4264 /* set_raw_breakpoint is a low level routine for allocating and
4265 partially initializing a breakpoint of type BPTYPE. The newly
4266 created breakpoint's address, section, source file name, and line
4267 number are provided by SAL. The newly created and partially
4268 initialized breakpoint is added to the breakpoint chain and
4269 is also returned as the value of this function.
4271 It is expected that the caller will complete the initialization of
4272 the newly created breakpoint struct as well as output any status
4273 information regarding the creation of a new breakpoint. In
4274 particular, set_raw_breakpoint does NOT set the breakpoint
4275 number! Care should be taken to not allow an error to occur
4276 prior to completing the initialization of the breakpoint. If this
4277 should happen, a bogus breakpoint will be left on the chain. */
4280 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4282 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4283 CORE_ADDR adjusted_address
;
4285 /* Adjust the breakpoint's address prior to allocating a location.
4286 Once we call allocate_bp_location(), that mostly uninitialized
4287 location will be placed on the location chain. Adjustment of the
4288 breakpoint may cause target_read_memory() to be called and we do
4289 not want its scan of the location chain to find a breakpoint and
4290 location that's only been partially initialized. */
4291 adjusted_address
= adjust_breakpoint_address (sal
.pc
, bptype
);
4293 b
->loc
= allocate_bp_location (b
, bptype
);
4294 b
->loc
->requested_address
= sal
.pc
;
4295 b
->loc
->address
= adjusted_address
;
4297 if (sal
.symtab
== NULL
)
4298 b
->source_file
= NULL
;
4300 b
->source_file
= savestring (sal
.symtab
->filename
,
4301 strlen (sal
.symtab
->filename
));
4302 b
->loc
->section
= sal
.section
;
4303 b
->line_number
= sal
.line
;
4305 set_breakpoint_location_function (b
->loc
);
4307 check_duplicates (b
);
4308 breakpoints_changed ();
4314 /* Note that the breakpoint object B describes a permanent breakpoint
4315 instruction, hard-wired into the inferior's code. */
4317 make_breakpoint_permanent (struct breakpoint
*b
)
4319 struct bp_location
*bl
;
4320 b
->enable_state
= bp_permanent
;
4322 /* By definition, permanent breakpoints are already present in the code.
4323 Mark all locations as inserted. For now, make_breakpoint_permanent
4324 is called in just one place, so it's hard to say if it's reasonable
4325 to have permanent breakpoint with multiple locations or not,
4326 but it's easy to implmement. */
4327 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4331 static struct breakpoint
*
4332 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4334 static int internal_breakpoint_number
= -1;
4335 struct symtab_and_line sal
;
4336 struct breakpoint
*b
;
4338 init_sal (&sal
); /* initialize to zeroes */
4341 sal
.section
= find_pc_overlay (sal
.pc
);
4343 b
= set_raw_breakpoint (sal
, type
);
4344 b
->number
= internal_breakpoint_number
--;
4345 b
->disposition
= disp_donttouch
;
4352 create_longjmp_breakpoint (char *func_name
)
4354 struct breakpoint
*b
;
4355 struct minimal_symbol
*m
;
4357 if (func_name
== NULL
)
4358 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4361 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4364 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4367 b
->enable_state
= bp_disabled
;
4370 b
->addr_string
= xstrdup (func_name
);
4373 /* Call this routine when stepping and nexting to enable a breakpoint
4374 if we do a longjmp(). When we hit that breakpoint, call
4375 set_longjmp_resume_breakpoint() to figure out where we are going. */
4378 enable_longjmp_breakpoint (void)
4380 struct breakpoint
*b
;
4383 if (b
->type
== bp_longjmp
)
4385 b
->enable_state
= bp_enabled
;
4386 check_duplicates (b
);
4391 disable_longjmp_breakpoint (void)
4393 struct breakpoint
*b
;
4396 if (b
->type
== bp_longjmp
4397 || b
->type
== bp_longjmp_resume
)
4399 b
->enable_state
= bp_disabled
;
4400 check_duplicates (b
);
4405 create_overlay_event_breakpoint (char *func_name
)
4407 struct breakpoint
*b
;
4408 struct minimal_symbol
*m
;
4410 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4413 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4415 b
->addr_string
= xstrdup (func_name
);
4417 if (overlay_debugging
== ovly_auto
)
4419 b
->enable_state
= bp_enabled
;
4420 overlay_events_enabled
= 1;
4424 b
->enable_state
= bp_disabled
;
4425 overlay_events_enabled
= 0;
4430 enable_overlay_breakpoints (void)
4432 struct breakpoint
*b
;
4435 if (b
->type
== bp_overlay_event
)
4437 b
->enable_state
= bp_enabled
;
4438 check_duplicates (b
);
4439 overlay_events_enabled
= 1;
4444 disable_overlay_breakpoints (void)
4446 struct breakpoint
*b
;
4449 if (b
->type
== bp_overlay_event
)
4451 b
->enable_state
= bp_disabled
;
4452 check_duplicates (b
);
4453 overlay_events_enabled
= 0;
4458 create_thread_event_breakpoint (CORE_ADDR address
)
4460 struct breakpoint
*b
;
4462 b
= create_internal_breakpoint (address
, bp_thread_event
);
4464 b
->enable_state
= bp_enabled
;
4465 /* addr_string has to be used or breakpoint_re_set will delete me. */
4466 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4472 remove_thread_event_breakpoints (void)
4474 struct breakpoint
*b
, *temp
;
4476 ALL_BREAKPOINTS_SAFE (b
, temp
)
4477 if (b
->type
== bp_thread_event
)
4478 delete_breakpoint (b
);
4481 struct captured_parse_breakpoint_args
4484 struct symtabs_and_lines
*sals_p
;
4485 char ***addr_string_p
;
4489 struct lang_and_radix
4497 remove_solib_event_breakpoints (void)
4499 struct breakpoint
*b
, *temp
;
4501 ALL_BREAKPOINTS_SAFE (b
, temp
)
4502 if (b
->type
== bp_shlib_event
)
4503 delete_breakpoint (b
);
4507 create_solib_event_breakpoint (CORE_ADDR address
)
4509 struct breakpoint
*b
;
4511 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4515 /* Disable any breakpoints that are on code in shared libraries. Only
4516 apply to enabled breakpoints, disabled ones can just stay disabled. */
4519 disable_breakpoints_in_shlibs (void)
4521 struct bp_location
*loc
;
4522 int disabled_shlib_breaks
= 0;
4524 ALL_BP_LOCATIONS (loc
)
4526 struct breakpoint
*b
= loc
->owner
;
4527 /* We apply the check to all breakpoints, including disabled
4528 for those with loc->duplicate set. This is so that when breakpoint
4529 becomes enabled, or the duplicate is removed, gdb will try to insert
4530 all breakpoints. If we don't set shlib_disabled here, we'll try
4531 to insert those breakpoints and fail. */
4532 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4533 && !loc
->shlib_disabled
4535 && PC_SOLIB (loc
->address
)
4537 && solib_address (loc
->address
)
4541 loc
->shlib_disabled
= 1;
4546 /* Disable any breakpoints that are in in an unloaded shared library. Only
4547 apply to enabled breakpoints, disabled ones can just stay disabled. */
4550 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4552 struct bp_location
*loc
;
4553 int disabled_shlib_breaks
= 0;
4555 ALL_BP_LOCATIONS (loc
)
4557 struct breakpoint
*b
= loc
->owner
;
4558 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4559 || loc
->loc_type
== bp_loc_software_breakpoint
)
4560 && !loc
->shlib_disabled
)
4563 char *so_name
= PC_SOLIB (loc
->address
);
4565 char *so_name
= solib_address (loc
->address
);
4567 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4569 loc
->shlib_disabled
= 1;
4570 /* At this point, we cannot rely on remove_breakpoint
4571 succeeding so we must mark the breakpoint as not inserted
4572 to prevent future errors occurring in remove_breakpoints. */
4574 if (!disabled_shlib_breaks
)
4576 target_terminal_ours_for_output ();
4577 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4580 disabled_shlib_breaks
= 1;
4587 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4588 enum bptype bp_kind
)
4590 struct symtab_and_line sal
;
4591 struct breakpoint
*b
;
4592 int thread
= -1; /* All threads. */
4599 b
= set_raw_breakpoint (sal
, bp_kind
);
4600 set_breakpoint_count (breakpoint_count
+ 1);
4601 b
->number
= breakpoint_count
;
4602 b
->cond_string
= (cond_string
== NULL
) ?
4603 NULL
: savestring (cond_string
, strlen (cond_string
));
4605 b
->addr_string
= NULL
;
4606 b
->enable_state
= bp_enabled
;
4607 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4608 b
->forked_inferior_pid
= 0;
4614 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4616 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4620 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4622 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4626 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4628 struct symtab_and_line sal
;
4629 struct breakpoint
*b
;
4630 int thread
= -1; /* All threads. */
4637 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4638 set_breakpoint_count (breakpoint_count
+ 1);
4639 b
->number
= breakpoint_count
;
4640 b
->cond_string
= (cond_string
== NULL
) ?
4641 NULL
: savestring (cond_string
, strlen (cond_string
));
4643 b
->addr_string
= NULL
;
4644 b
->enable_state
= bp_enabled
;
4645 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4651 hw_breakpoint_used_count (void)
4653 struct breakpoint
*b
;
4658 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4666 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4668 struct breakpoint
*b
;
4671 *other_type_used
= 0;
4674 if (breakpoint_enabled (b
))
4676 if (b
->type
== type
)
4678 else if ((b
->type
== bp_hardware_watchpoint
||
4679 b
->type
== bp_read_watchpoint
||
4680 b
->type
== bp_access_watchpoint
))
4681 *other_type_used
= 1;
4687 /* Call this after hitting the longjmp() breakpoint. Use this to set
4688 a new breakpoint at the target of the jmp_buf.
4690 FIXME - This ought to be done by setting a temporary breakpoint
4691 that gets deleted automatically... */
4694 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4696 struct breakpoint
*b
;
4699 if (b
->type
== bp_longjmp_resume
)
4701 b
->loc
->requested_address
= pc
;
4702 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4704 b
->enable_state
= bp_enabled
;
4705 b
->frame_id
= frame_id
;
4706 check_duplicates (b
);
4712 disable_watchpoints_before_interactive_call_start (void)
4714 struct breakpoint
*b
;
4718 if (((b
->type
== bp_watchpoint
)
4719 || (b
->type
== bp_hardware_watchpoint
)
4720 || (b
->type
== bp_read_watchpoint
)
4721 || (b
->type
== bp_access_watchpoint
))
4722 && breakpoint_enabled (b
))
4724 b
->enable_state
= bp_call_disabled
;
4725 check_duplicates (b
);
4731 enable_watchpoints_after_interactive_call_stop (void)
4733 struct breakpoint
*b
;
4737 if (((b
->type
== bp_watchpoint
)
4738 || (b
->type
== bp_hardware_watchpoint
)
4739 || (b
->type
== bp_read_watchpoint
)
4740 || (b
->type
== bp_access_watchpoint
))
4741 && (b
->enable_state
== bp_call_disabled
))
4743 b
->enable_state
= bp_enabled
;
4744 check_duplicates (b
);
4750 /* Set a breakpoint that will evaporate an end of command
4751 at address specified by SAL.
4752 Restrict it to frame FRAME if FRAME is nonzero. */
4755 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4758 struct breakpoint
*b
;
4759 b
= set_raw_breakpoint (sal
, type
);
4760 b
->enable_state
= bp_enabled
;
4761 b
->disposition
= disp_donttouch
;
4762 b
->frame_id
= frame_id
;
4764 /* If we're debugging a multi-threaded program, then we
4765 want momentary breakpoints to be active in only a
4766 single thread of control. */
4767 if (in_thread_list (inferior_ptid
))
4768 b
->thread
= pid_to_thread_id (inferior_ptid
);
4774 /* Tell the user we have just set a breakpoint B. */
4777 mention (struct breakpoint
*b
)
4780 struct cleanup
*old_chain
, *ui_out_chain
;
4781 struct ui_stream
*stb
;
4783 stb
= ui_out_stream_new (uiout
);
4784 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4786 /* FIXME: This is misplaced; mention() is called by things (like
4787 hitting a watchpoint) other than breakpoint creation. It should
4788 be possible to clean this up and at the same time replace the
4789 random calls to breakpoint_changed with this hook, as has already
4790 been done for deprecated_delete_breakpoint_hook and so on. */
4791 if (deprecated_create_breakpoint_hook
)
4792 deprecated_create_breakpoint_hook (b
);
4793 breakpoint_create_event (b
->number
);
4795 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4796 b
->ops
->print_mention (b
);
4801 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4804 ui_out_text (uiout
, "Watchpoint ");
4805 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4806 ui_out_field_int (uiout
, "number", b
->number
);
4807 ui_out_text (uiout
, ": ");
4808 print_expression (b
->exp
, stb
->stream
);
4809 ui_out_field_stream (uiout
, "exp", stb
);
4810 do_cleanups (ui_out_chain
);
4812 case bp_hardware_watchpoint
:
4813 ui_out_text (uiout
, "Hardware watchpoint ");
4814 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4815 ui_out_field_int (uiout
, "number", b
->number
);
4816 ui_out_text (uiout
, ": ");
4817 print_expression (b
->exp
, stb
->stream
);
4818 ui_out_field_stream (uiout
, "exp", stb
);
4819 do_cleanups (ui_out_chain
);
4821 case bp_read_watchpoint
:
4822 ui_out_text (uiout
, "Hardware read watchpoint ");
4823 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4824 ui_out_field_int (uiout
, "number", b
->number
);
4825 ui_out_text (uiout
, ": ");
4826 print_expression (b
->exp
, stb
->stream
);
4827 ui_out_field_stream (uiout
, "exp", stb
);
4828 do_cleanups (ui_out_chain
);
4830 case bp_access_watchpoint
:
4831 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4832 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4833 ui_out_field_int (uiout
, "number", b
->number
);
4834 ui_out_text (uiout
, ": ");
4835 print_expression (b
->exp
, stb
->stream
);
4836 ui_out_field_stream (uiout
, "exp", stb
);
4837 do_cleanups (ui_out_chain
);
4840 if (ui_out_is_mi_like_p (uiout
))
4845 printf_filtered (_("Breakpoint %d"), b
->number
);
4848 case bp_hardware_breakpoint
:
4849 if (ui_out_is_mi_like_p (uiout
))
4854 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4858 case bp_catch_unload
:
4859 printf_filtered (_("Catchpoint %d (%s %s)"),
4861 (b
->type
== bp_catch_load
) ? "load" : "unload",
4862 (b
->dll_pathname
!= NULL
) ?
4863 b
->dll_pathname
: "<any library>");
4866 case bp_catch_vfork
:
4867 printf_filtered (_("Catchpoint %d (%s)"),
4869 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4872 printf_filtered (_("Catchpoint %d (exec)"),
4879 case bp_longjmp_resume
:
4880 case bp_step_resume
:
4882 case bp_watchpoint_scope
:
4883 case bp_shlib_event
:
4884 case bp_thread_event
:
4885 case bp_overlay_event
:
4891 /* i18n: cagney/2005-02-11: Below needs to be merged into a
4895 printf_filtered (_(" (%s) pending."), b
->addr_string
);
4899 if (addressprint
|| b
->source_file
== NULL
)
4901 printf_filtered (" at ");
4902 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
4905 printf_filtered (": file %s, line %d.",
4906 b
->source_file
, b
->line_number
);
4910 struct bp_location
*loc
= b
->loc
;
4912 for (; loc
; loc
= loc
->next
)
4914 printf_filtered (" (%d locations)", n
);
4919 do_cleanups (old_chain
);
4920 if (ui_out_is_mi_like_p (uiout
))
4922 printf_filtered ("\n");
4926 static struct bp_location
*
4927 add_location_to_breakpoint (struct breakpoint
*b
, enum bptype bptype
,
4928 const struct symtab_and_line
*sal
)
4930 struct bp_location
*loc
, **tmp
;
4932 loc
= allocate_bp_location (b
, bptype
);
4933 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
4936 loc
->requested_address
= sal
->pc
;
4937 loc
->address
= adjust_breakpoint_address (loc
->requested_address
,
4939 loc
->section
= sal
->section
;
4941 set_breakpoint_location_function (loc
);
4945 /* Create a breakpoint with SAL as location. Use ADDR_STRING
4946 as textual description of the location, and COND_STRING
4947 as condition expression. */
4950 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
4952 enum bptype type
, enum bpdisp disposition
,
4953 int thread
, int ignore_count
, int from_tty
)
4955 struct breakpoint
*b
= NULL
;
4958 if (type
== bp_hardware_breakpoint
)
4960 int i
= hw_breakpoint_used_count ();
4961 int target_resources_ok
=
4962 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4964 if (target_resources_ok
== 0)
4965 error (_("No hardware breakpoint support in the target."));
4966 else if (target_resources_ok
< 0)
4967 error (_("Hardware breakpoints used exceeds limit."));
4970 for (i
= 0; i
< sals
.nelts
; ++i
)
4972 struct symtab_and_line sal
= sals
.sals
[i
];
4973 struct bp_location
*loc
;
4976 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
4980 b
= set_raw_breakpoint (sal
, type
);
4981 set_breakpoint_count (breakpoint_count
+ 1);
4982 b
->number
= breakpoint_count
;
4985 b
->cond_string
= cond_string
;
4986 b
->ignore_count
= ignore_count
;
4987 b
->enable_state
= bp_enabled
;
4988 b
->disposition
= disposition
;
4994 loc
= add_location_to_breakpoint (b
, type
, &sal
);
4999 char *arg
= b
->cond_string
;
5000 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5002 error (_("Garbage %s follows condition"), arg
);
5007 b
->addr_string
= addr_string
;
5009 /* addr_string has to be used or breakpoint_re_set will delete
5011 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5016 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5017 elements to fill the void space. */
5018 static void remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5020 int i
= index_to_remove
+1;
5021 int last_index
= sal
->nelts
-1;
5023 for (;i
<= last_index
; ++i
)
5024 sal
->sals
[i
-1] = sal
->sals
[i
];
5029 /* If appropriate, obtains all sals that correspond
5030 to the same file and line as SAL. This is done
5031 only if SAL does not have explicit PC and has
5032 line and file information. If we got just a single
5033 expanded sal, return the original.
5035 Otherwise, if SAL.explicit_line is not set, filter out
5036 all sals for which the name of enclosing function
5037 is different from SAL. This makes sure that if we have
5038 breakpoint originally set in template instantiation, say
5039 foo<int>(), we won't expand SAL to locations at the same
5040 line in all existing instantiations of 'foo'.
5043 struct symtabs_and_lines
5044 expand_line_sal_maybe (struct symtab_and_line sal
)
5046 struct symtabs_and_lines expanded
;
5047 CORE_ADDR original_pc
= sal
.pc
;
5048 char *original_function
= NULL
;
5052 /* If we have explicit pc, don't expand.
5053 If we have no line number, we can't expand. */
5054 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5057 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5058 expanded
.sals
[0] = sal
;
5063 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5065 expanded
= expand_line_sal (sal
);
5066 if (expanded
.nelts
== 1)
5068 /* We had one sal, we got one sal. Without futher
5069 processing, just return the original sal. */
5070 xfree (expanded
.sals
);
5072 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5073 sal
.pc
= original_pc
;
5074 expanded
.sals
[0] = sal
;
5078 if (!sal
.explicit_line
)
5080 CORE_ADDR func_addr
, func_end
;
5081 for (i
= 0; i
< expanded
.nelts
; ++i
)
5083 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5084 char *this_function
;
5085 if (find_pc_partial_function (pc
, &this_function
,
5086 &func_addr
, &func_end
))
5088 if (this_function
&&
5089 strcmp (this_function
, original_function
) != 0)
5091 remove_sal (&expanded
, i
);
5094 else if (func_addr
== pc
)
5096 /* We're at beginning of a function, and should
5098 struct symbol
*sym
= find_pc_function (pc
);
5100 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5103 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5110 if (expanded
.nelts
<= 1)
5112 /* This is un ugly workaround. If we get zero
5113 expanded sals then something is really wrong.
5114 Fix that by returnign the original sal. */
5115 xfree (expanded
.sals
);
5117 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5118 sal
.pc
= original_pc
;
5119 expanded
.sals
[0] = sal
;
5126 for (i
= 0; i
< expanded
.nelts
; ++i
)
5127 if (expanded
.sals
[i
].pc
== original_pc
)
5138 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5139 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5140 value. COND_STRING, if not NULL, specified the condition to be
5141 used for all breakpoints. Essentially the only case where
5142 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5143 function. In that case, it's still not possible to specify
5144 separate conditions for different overloaded functions, so
5145 we take just a single condition string.
5147 NOTE: If the function succeeds, the caller is expected to cleanup
5148 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5149 array contents). If the function fails (error() is called), the
5150 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5151 COND and SALS arrays and each of those arrays contents. */
5154 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5156 enum bptype type
, enum bpdisp disposition
,
5157 int thread
, int ignore_count
, int from_tty
)
5160 for (i
= 0; i
< sals
.nelts
; ++i
)
5162 struct symtabs_and_lines expanded
=
5163 expand_line_sal_maybe (sals
.sals
[i
]);
5165 create_breakpoint (expanded
, addr_string
[i
],
5166 cond_string
, type
, disposition
,
5167 thread
, ignore_count
, from_tty
);
5171 /* Parse ARG which is assumed to be a SAL specification possibly
5172 followed by conditionals. On return, SALS contains an array of SAL
5173 addresses found. ADDR_STRING contains a vector of (canonical)
5174 address strings. ARG points to the end of the SAL. */
5177 parse_breakpoint_sals (char **address
,
5178 struct symtabs_and_lines
*sals
,
5179 char ***addr_string
,
5182 char *addr_start
= *address
;
5183 *addr_string
= NULL
;
5184 /* If no arg given, or if first arg is 'if ', use the default
5186 if ((*address
) == NULL
5187 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5189 if (default_breakpoint_valid
)
5191 struct symtab_and_line sal
;
5192 init_sal (&sal
); /* initialize to zeroes */
5193 sals
->sals
= (struct symtab_and_line
*)
5194 xmalloc (sizeof (struct symtab_and_line
));
5195 sal
.pc
= default_breakpoint_address
;
5196 sal
.line
= default_breakpoint_line
;
5197 sal
.symtab
= default_breakpoint_symtab
;
5198 sal
.section
= find_pc_overlay (sal
.pc
);
5199 sals
->sals
[0] = sal
;
5203 error (_("No default breakpoint address now."));
5207 /* Force almost all breakpoints to be in terms of the
5208 current_source_symtab (which is decode_line_1's default). This
5209 should produce the results we want almost all of the time while
5210 leaving default_breakpoint_* alone.
5211 ObjC: However, don't match an Objective-C method name which
5212 may have a '+' or '-' succeeded by a '[' */
5214 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5216 if (default_breakpoint_valid
5218 || ((strchr ("+-", (*address
)[0]) != NULL
)
5219 && ((*address
)[1] != '['))))
5220 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5221 default_breakpoint_line
, addr_string
,
5224 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5225 addr_string
, not_found_ptr
);
5227 /* For any SAL that didn't have a canonical string, fill one in. */
5228 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5229 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5230 if (addr_start
!= (*address
))
5233 for (i
= 0; i
< sals
->nelts
; i
++)
5235 /* Add the string if not present. */
5236 if ((*addr_string
)[i
] == NULL
)
5237 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5243 /* Convert each SAL into a real PC. Verify that the PC can be
5244 inserted as a breakpoint. If it can't throw an error. */
5247 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5251 for (i
= 0; i
< sals
->nelts
; i
++)
5252 resolve_sal_pc (&sals
->sals
[i
]);
5256 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5258 struct captured_parse_breakpoint_args
*args
= data
;
5260 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5261 args
->not_found_ptr
);
5264 /* Given TOK, a string specification of condition and thread, as
5265 accepted by the 'break' command, extract the condition
5266 string and thread number and set *COND_STRING and *THREAD.
5267 PC identifies the context at which the condition should be parsed.
5268 If no condition is found, *COND_STRING is set to NULL.
5269 If no thread is found, *THREAD is set to -1. */
5271 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5272 char **cond_string
, int *thread
)
5274 *cond_string
= NULL
;
5280 char *cond_start
= NULL
;
5281 char *cond_end
= NULL
;
5282 while (*tok
== ' ' || *tok
== '\t')
5287 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5290 toklen
= end_tok
- tok
;
5292 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5294 tok
= cond_start
= end_tok
+ 1;
5295 parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5297 *cond_string
= savestring (cond_start
,
5298 cond_end
- cond_start
);
5300 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5306 *thread
= strtol (tok
, &tok
, 0);
5308 error (_("Junk after thread keyword."));
5309 if (!valid_thread_id (*thread
))
5310 error (_("Unknown thread %d."), *thread
);
5313 error (_("Junk at end of arguments."));
5317 /* Set a breakpoint. This function is shared between
5318 CLI and MI functions for setting a breakpoint.
5319 This function has two major modes of operations,
5320 selected by the PARSE_CONDITION_AND_THREAD parameter.
5321 If non-zero, the function will parse arg, extracting
5322 breakpoint location, address and thread. Otherwise,
5323 ARG is just the location of breakpoint, with condition
5324 and thread specified by the COND_STRING and THREAD
5328 break_command_really (char *arg
, char *cond_string
, int thread
,
5329 int parse_condition_and_thread
,
5330 int tempflag
, int hardwareflag
,
5332 enum auto_boolean pending_break_support
,
5335 struct gdb_exception e
;
5336 struct symtabs_and_lines sals
;
5337 struct symtab_and_line pending_sal
;
5340 char *addr_start
= arg
;
5342 struct cleanup
*old_chain
;
5343 struct cleanup
*breakpoint_chain
= NULL
;
5344 struct captured_parse_breakpoint_args parse_args
;
5353 parse_args
.arg_p
= &arg
;
5354 parse_args
.sals_p
= &sals
;
5355 parse_args
.addr_string_p
= &addr_string
;
5356 parse_args
.not_found_ptr
= ¬_found
;
5358 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5359 &parse_args
, RETURN_MASK_ALL
);
5361 /* If caller is interested in rc value from parse, set value. */
5365 throw_exception (e
);
5369 case NOT_FOUND_ERROR
:
5371 /* If pending breakpoint support is turned off, throw
5374 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5375 throw_exception (e
);
5377 exception_print (gdb_stderr
, e
);
5379 /* If pending breakpoint support is auto query and the user
5380 selects no, then simply return the error code. */
5381 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5382 !nquery ("Make breakpoint pending on future shared library load? "))
5385 /* At this point, either the user was queried about setting
5386 a pending breakpoint and selected yes, or pending
5387 breakpoint behavior is on and thus a pending breakpoint
5388 is defaulted on behalf of the user. */
5389 copy_arg
= xstrdup (addr_start
);
5390 addr_string
= ©_arg
;
5392 sals
.sals
= &pending_sal
;
5397 throw_exception (e
);
5404 /* Create a chain of things that always need to be cleaned up. */
5405 old_chain
= make_cleanup (null_cleanup
, 0);
5409 /* Make sure that all storage allocated to SALS gets freed. */
5410 make_cleanup (xfree
, sals
.sals
);
5412 /* Cleanup the addr_string array but not its contents. */
5413 make_cleanup (xfree
, addr_string
);
5416 /* ----------------------------- SNIP -----------------------------
5417 Anything added to the cleanup chain beyond this point is assumed
5418 to be part of a breakpoint. If the breakpoint create succeeds
5419 then the memory is not reclaimed. */
5420 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5422 /* Mark the contents of the addr_string for cleanup. These go on
5423 the breakpoint_chain and only occure if the breakpoint create
5425 for (i
= 0; i
< sals
.nelts
; i
++)
5427 if (addr_string
[i
] != NULL
)
5428 make_cleanup (xfree
, addr_string
[i
]);
5431 /* Resolve all line numbers to PC's and verify that the addresses
5432 are ok for the target. */
5434 breakpoint_sals_to_pc (&sals
, addr_start
);
5436 /* Verify that condition can be parsed, before setting any
5437 breakpoints. Allocate a separate condition expression for each
5441 if (parse_condition_and_thread
)
5443 /* Here we only parse 'arg' to separate condition
5444 from thread number, so parsing in context of first
5445 sal is OK. When setting the breakpoint we'll
5446 re-parse it in context of each sal. */
5449 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5451 make_cleanup (xfree
, cond_string
);
5455 /* Create a private copy of condition string. */
5458 cond_string
= xstrdup (cond_string
);
5459 make_cleanup (xfree
, cond_string
);
5462 create_breakpoints (sals
, addr_string
, cond_string
,
5463 hardwareflag
? bp_hardware_breakpoint
5465 tempflag
? disp_del
: disp_donttouch
,
5466 thread
, ignore_count
, from_tty
);
5470 struct symtab_and_line sal
= {0};
5471 struct breakpoint
*b
;
5473 make_cleanup (xfree
, copy_arg
);
5475 b
= set_raw_breakpoint_without_location (hardwareflag
5476 ? bp_hardware_breakpoint
5478 set_breakpoint_count (breakpoint_count
+ 1);
5479 b
->number
= breakpoint_count
;
5481 b
->addr_string
= addr_string
[0];
5482 b
->cond_string
= NULL
;
5483 b
->ignore_count
= ignore_count
;
5484 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5485 b
->condition_not_parsed
= 1;
5490 warning (_("Multiple breakpoints were set.\n"
5491 "Use the \"delete\" command to delete unwanted breakpoints."));
5492 /* That's it. Discard the cleanups for data inserted into the
5494 discard_cleanups (breakpoint_chain
);
5495 /* But cleanup everything else. */
5496 do_cleanups (old_chain
);
5499 /* Set a breakpoint.
5500 ARG is a string describing breakpoint address,
5501 condition, and thread.
5502 FLAG specifies if a breakpoint is hardware on,
5503 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5507 break_command_1 (char *arg
, int flag
, int from_tty
)
5509 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5510 int tempflag
= flag
& BP_TEMPFLAG
;
5512 break_command_really (arg
,
5513 NULL
, 0, 1 /* parse arg */,
5514 tempflag
, hardwareflag
,
5515 0 /* Ignore count */,
5516 pending_break_support
, from_tty
);
5521 set_breakpoint (char *address
, char *condition
,
5522 int hardwareflag
, int tempflag
,
5523 int thread
, int ignore_count
,
5526 break_command_really (address
, condition
, thread
,
5527 0 /* condition and thread are valid. */,
5528 tempflag
, hardwareflag
,
5531 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5535 /* Adjust SAL to the first instruction past the function prologue.
5536 The end of the prologue is determined using the line table from
5537 the debugging information.
5539 If SAL is already past the prologue, then do nothing. */
5542 skip_prologue_sal (struct symtab_and_line
*sal
)
5544 struct symbol
*sym
= find_pc_function (sal
->pc
);
5545 struct symtab_and_line start_sal
;
5550 start_sal
= find_function_start_sal (sym
, 1);
5551 if (sal
->pc
< start_sal
.pc
)
5555 /* Helper function for break_command_1 and disassemble_command. */
5558 resolve_sal_pc (struct symtab_and_line
*sal
)
5562 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5564 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5565 error (_("No line %d in file \"%s\"."),
5566 sal
->line
, sal
->symtab
->filename
);
5569 /* If this SAL corresponds to a breakpoint inserted using
5570 a line number, then skip the function prologue if necessary. */
5571 if (sal
->explicit_line
)
5572 skip_prologue_sal (sal
);
5575 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5577 struct blockvector
*bv
;
5581 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5584 sym
= block_function (b
);
5587 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5588 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5592 /* It really is worthwhile to have the section, so we'll just
5593 have to look harder. This case can be executed if we have
5594 line numbers but no functions (as can happen in assembly
5597 struct minimal_symbol
*msym
;
5599 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5601 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5608 break_command (char *arg
, int from_tty
)
5610 break_command_1 (arg
, 0, from_tty
);
5614 tbreak_command (char *arg
, int from_tty
)
5616 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5620 hbreak_command (char *arg
, int from_tty
)
5622 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5626 thbreak_command (char *arg
, int from_tty
)
5628 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5632 stop_command (char *arg
, int from_tty
)
5634 printf_filtered (_("Specify the type of breakpoint to set.\n\
5635 Usage: stop in <function | address>\n\
5636 stop at <line>\n"));
5640 stopin_command (char *arg
, int from_tty
)
5644 if (arg
== (char *) NULL
)
5646 else if (*arg
!= '*')
5651 /* look for a ':'. If this is a line number specification, then
5652 say it is bad, otherwise, it should be an address or
5653 function/method name */
5654 while (*argptr
&& !hasColon
)
5656 hasColon
= (*argptr
== ':');
5661 badInput
= (*argptr
!= ':'); /* Not a class::method */
5663 badInput
= isdigit (*arg
); /* a simple line number */
5667 printf_filtered (_("Usage: stop in <function | address>\n"));
5669 break_command_1 (arg
, 0, from_tty
);
5673 stopat_command (char *arg
, int from_tty
)
5677 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5684 /* look for a ':'. If there is a '::' then get out, otherwise
5685 it is probably a line number. */
5686 while (*argptr
&& !hasColon
)
5688 hasColon
= (*argptr
== ':');
5693 badInput
= (*argptr
== ':'); /* we have class::method */
5695 badInput
= !isdigit (*arg
); /* not a line number */
5699 printf_filtered (_("Usage: stop at <line>\n"));
5701 break_command_1 (arg
, 0, from_tty
);
5704 /* accessflag: hw_write: watch write,
5705 hw_read: watch read,
5706 hw_access: watch access (read or write) */
5708 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5710 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
5711 struct symtab_and_line sal
;
5712 struct expression
*exp
;
5713 struct block
*exp_valid_block
;
5714 struct value
*val
, *mark
;
5715 struct frame_info
*frame
;
5716 struct frame_info
*prev_frame
= NULL
;
5717 char *exp_start
= NULL
;
5718 char *exp_end
= NULL
;
5719 char *tok
, *id_tok_start
, *end_tok
;
5721 char *cond_start
= NULL
;
5722 char *cond_end
= NULL
;
5723 struct expression
*cond
= NULL
;
5724 int i
, other_type_used
, target_resources_ok
= 0;
5725 enum bptype bp_type
;
5729 init_sal (&sal
); /* initialize to zeroes */
5731 /* Make sure that we actually have parameters to parse. */
5732 if (arg
!= NULL
&& arg
[0] != '\0')
5734 toklen
= strlen (arg
); /* Size of argument list. */
5736 /* Points tok to the end of the argument list. */
5737 tok
= arg
+ toklen
- 1;
5739 /* Go backwards in the parameters list. Skip the last parameter.
5740 If we're expecting a 'thread <thread_num>' parameter, this should
5741 be the thread identifier. */
5742 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5744 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5747 /* Points end_tok to the beginning of the last token. */
5748 id_tok_start
= tok
+ 1;
5750 /* Go backwards in the parameters list. Skip one more parameter.
5751 If we're expecting a 'thread <thread_num>' parameter, we should
5752 reach a "thread" token. */
5753 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5758 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5761 /* Move the pointer forward to skip the whitespace and
5762 calculate the length of the token. */
5764 toklen
= end_tok
- tok
;
5766 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5768 /* At this point we've found a "thread" token, which means
5769 the user is trying to set a watchpoint that triggers
5770 only in a specific thread. */
5773 /* Extract the thread ID from the next token. */
5774 thread
= strtol (id_tok_start
, &endp
, 0);
5776 /* Check if the user provided a valid numeric value for the
5778 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
5779 error (_("Invalid thread ID specification %s."), id_tok_start
);
5781 /* Check if the thread actually exists. */
5782 if (!valid_thread_id (thread
))
5783 error (_("Unknown thread %d."), thread
);
5785 /* Truncate the string and get rid of the thread <thread_num>
5786 parameter before the parameter list is parsed by the
5787 evaluate_expression() function. */
5792 /* Parse the rest of the arguments. */
5793 innermost_block
= NULL
;
5795 exp
= parse_exp_1 (&arg
, 0, 0);
5797 exp_valid_block
= innermost_block
;
5798 mark
= value_mark ();
5799 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
5801 release_value (val
);
5804 while (*tok
== ' ' || *tok
== '\t')
5808 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5811 toklen
= end_tok
- tok
;
5812 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5814 tok
= cond_start
= end_tok
+ 1;
5815 cond
= parse_exp_1 (&tok
, 0, 0);
5819 error (_("Junk at end of command."));
5821 if (accessflag
== hw_read
)
5822 bp_type
= bp_read_watchpoint
;
5823 else if (accessflag
== hw_access
)
5824 bp_type
= bp_access_watchpoint
;
5826 bp_type
= bp_hardware_watchpoint
;
5828 mem_cnt
= can_use_hardware_watchpoint (val
);
5829 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5830 error (_("Expression cannot be implemented with read/access watchpoint."));
5833 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5834 target_resources_ok
=
5835 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5837 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5838 error (_("Target does not support this type of hardware watchpoint."));
5840 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5841 error (_("Target can only support one kind of HW watchpoint at a time."));
5844 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5845 watchpoint could not be set. */
5846 if (!mem_cnt
|| target_resources_ok
<= 0)
5847 bp_type
= bp_watchpoint
;
5849 frame
= block_innermost_frame (exp_valid_block
);
5851 prev_frame
= get_prev_frame (frame
);
5855 /* If the expression is "local", then set up a "watchpoint scope"
5856 breakpoint at the point where we've left the scope of the watchpoint
5857 expression. Create the scope breakpoint before the watchpoint, so
5858 that we will encounter it first in bpstat_stop_status. */
5859 if (innermost_block
&& prev_frame
)
5861 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5862 bp_watchpoint_scope
);
5864 scope_breakpoint
->enable_state
= bp_enabled
;
5866 /* Automatically delete the breakpoint when it hits. */
5867 scope_breakpoint
->disposition
= disp_del
;
5869 /* Only break in the proper frame (help with recursion). */
5870 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5872 /* Set the address at which we will stop. */
5873 scope_breakpoint
->loc
->requested_address
5874 = get_frame_pc (prev_frame
);
5875 scope_breakpoint
->loc
->address
5876 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
5877 scope_breakpoint
->type
);
5880 /* Now set up the breakpoint. */
5881 b
= set_raw_breakpoint (sal
, bp_type
);
5882 set_breakpoint_count (breakpoint_count
+ 1);
5883 b
->number
= breakpoint_count
;
5885 b
->disposition
= disp_donttouch
;
5887 b
->exp_valid_block
= exp_valid_block
;
5888 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5891 b
->loc
->cond
= cond
;
5893 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5898 b
->watchpoint_frame
= get_frame_id (frame
);
5900 b
->watchpoint_frame
= null_frame_id
;
5902 if (scope_breakpoint
!= NULL
)
5904 /* The scope breakpoint is related to the watchpoint. We will
5905 need to act on them together. */
5906 b
->related_breakpoint
= scope_breakpoint
;
5907 scope_breakpoint
->related_breakpoint
= b
;
5910 value_free_to_mark (mark
);
5914 /* Return count of locations need to be watched and can be handled
5915 in hardware. If the watchpoint can not be handled
5916 in hardware return zero. */
5919 can_use_hardware_watchpoint (struct value
*v
)
5921 int found_memory_cnt
= 0;
5922 struct value
*head
= v
;
5924 /* Did the user specifically forbid us to use hardware watchpoints? */
5925 if (!can_use_hw_watchpoints
)
5928 /* Make sure that the value of the expression depends only upon
5929 memory contents, and values computed from them within GDB. If we
5930 find any register references or function calls, we can't use a
5931 hardware watchpoint.
5933 The idea here is that evaluating an expression generates a series
5934 of values, one holding the value of every subexpression. (The
5935 expression a*b+c has five subexpressions: a, b, a*b, c, and
5936 a*b+c.) GDB's values hold almost enough information to establish
5937 the criteria given above --- they identify memory lvalues,
5938 register lvalues, computed values, etcetera. So we can evaluate
5939 the expression, and then scan the chain of values that leaves
5940 behind to decide whether we can detect any possible change to the
5941 expression's final value using only hardware watchpoints.
5943 However, I don't think that the values returned by inferior
5944 function calls are special in any way. So this function may not
5945 notice that an expression involving an inferior function call
5946 can't be watched with hardware watchpoints. FIXME. */
5947 for (; v
; v
= value_next (v
))
5949 if (VALUE_LVAL (v
) == lval_memory
)
5952 /* A lazy memory lvalue is one that GDB never needed to fetch;
5953 we either just used its address (e.g., `a' in `a.b') or
5954 we never needed it at all (e.g., `a' in `a,b'). */
5958 /* Ahh, memory we actually used! Check if we can cover
5959 it with hardware watchpoints. */
5960 struct type
*vtype
= check_typedef (value_type (v
));
5962 /* We only watch structs and arrays if user asked for it
5963 explicitly, never if they just happen to appear in a
5964 middle of some value chain. */
5966 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5967 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5969 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
5970 int len
= TYPE_LENGTH (value_type (v
));
5972 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5979 else if (VALUE_LVAL (v
) != not_lval
5980 && deprecated_value_modifiable (v
) == 0)
5981 return 0; /* ??? What does this represent? */
5982 else if (VALUE_LVAL (v
) == lval_register
)
5983 return 0; /* cannot watch a register with a HW watchpoint */
5986 /* The expression itself looks suitable for using a hardware
5987 watchpoint, but give the target machine a chance to reject it. */
5988 return found_memory_cnt
;
5992 watch_command_wrapper (char *arg
, int from_tty
)
5994 watch_command (arg
, from_tty
);
5998 watch_command (char *arg
, int from_tty
)
6000 watch_command_1 (arg
, hw_write
, from_tty
);
6004 rwatch_command_wrapper (char *arg
, int from_tty
)
6006 rwatch_command (arg
, from_tty
);
6010 rwatch_command (char *arg
, int from_tty
)
6012 watch_command_1 (arg
, hw_read
, from_tty
);
6016 awatch_command_wrapper (char *arg
, int from_tty
)
6018 awatch_command (arg
, from_tty
);
6022 awatch_command (char *arg
, int from_tty
)
6024 watch_command_1 (arg
, hw_access
, from_tty
);
6028 /* Helper routines for the until_command routine in infcmd.c. Here
6029 because it uses the mechanisms of breakpoints. */
6031 /* This function is called by fetch_inferior_event via the
6032 cmd_continuation pointer, to complete the until command. It takes
6033 care of cleaning up the temporary breakpoints set up by the until
6036 until_break_command_continuation (struct continuation_arg
*arg
)
6038 struct cleanup
*cleanups
;
6040 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
6041 do_exec_cleanups (cleanups
);
6045 until_break_command (char *arg
, int from_tty
, int anywhere
)
6047 struct symtabs_and_lines sals
;
6048 struct symtab_and_line sal
;
6049 struct frame_info
*frame
= get_selected_frame (NULL
);
6050 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6051 struct breakpoint
*breakpoint
;
6052 struct cleanup
*old_chain
;
6053 struct continuation_arg
*arg1
;
6056 clear_proceed_status ();
6058 /* Set a breakpoint where the user wants it and at return from
6061 if (default_breakpoint_valid
)
6062 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6063 default_breakpoint_line
, (char ***) NULL
, NULL
);
6065 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6066 0, (char ***) NULL
, NULL
);
6068 if (sals
.nelts
!= 1)
6069 error (_("Couldn't get information on specified line."));
6072 xfree (sals
.sals
); /* malloc'd, so freed */
6075 error (_("Junk at end of arguments."));
6077 resolve_sal_pc (&sal
);
6080 /* If the user told us to continue until a specified location,
6081 we don't specify a frame at which we need to stop. */
6082 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6084 /* Otherwise, specify the current frame, because we want to stop only
6085 at the very same frame. */
6086 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6089 if (!target_can_async_p ())
6090 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6092 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
6094 /* If we are running asynchronously, and the target supports async
6095 execution, we are not waiting for the target to stop, in the call
6096 tp proceed, below. This means that we cannot delete the
6097 brekpoints until the target has actually stopped. The only place
6098 where we get a chance to do that is in fetch_inferior_event, so
6099 we must set things up for that. */
6101 if (target_can_async_p ())
6103 /* In this case the arg for the continuation is just the point
6104 in the exec_cleanups chain from where to start doing
6105 cleanups, because all the continuation does is the cleanups in
6106 the exec_cleanup_chain. */
6108 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
6110 arg1
->data
.pointer
= old_chain
;
6112 add_continuation (until_break_command_continuation
, arg1
);
6115 /* Keep within the current frame, or in frames called by the current
6119 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6120 sal
.pc
= get_frame_pc (prev_frame
);
6121 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6123 if (!target_can_async_p ())
6124 make_cleanup_delete_breakpoint (breakpoint
);
6126 make_exec_cleanup_delete_breakpoint (breakpoint
);
6129 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6130 /* Do the cleanups now, anly if we are not running asynchronously,
6131 of if we are, but the target is still synchronous. */
6132 if (!target_can_async_p ())
6133 do_cleanups (old_chain
);
6137 ep_skip_leading_whitespace (char **s
)
6139 if ((s
== NULL
) || (*s
== NULL
))
6141 while (isspace (**s
))
6145 /* This function examines a string, and attempts to find a token
6146 that might be an event name in the leading characters. If a
6147 possible match is found, a pointer to the last character of
6148 the token is returned. Else, NULL is returned. */
6151 ep_find_event_name_end (char *arg
)
6154 char *event_name_end
= NULL
;
6156 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6160 /* We break out of the loop when we find a token delimiter.
6161 Basically, we're looking for alphanumerics and underscores;
6162 anything else delimites the token. */
6165 if (!isalnum (*s
) && (*s
!= '_'))
6171 return event_name_end
;
6175 /* This function attempts to parse an optional "if <cond>" clause
6176 from the arg string. If one is not found, it returns NULL.
6178 Else, it returns a pointer to the condition string. (It does not
6179 attempt to evaluate the string against a particular block.) And,
6180 it updates arg to point to the first character following the parsed
6181 if clause in the arg string. */
6184 ep_parse_optional_if_clause (char **arg
)
6188 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6191 /* Skip the "if" keyword. */
6194 /* Skip any extra leading whitespace, and record the start of the
6195 condition string. */
6196 ep_skip_leading_whitespace (arg
);
6199 /* Assume that the condition occupies the remainder of the arg string. */
6200 (*arg
) += strlen (cond_string
);
6205 /* This function attempts to parse an optional filename from the arg
6206 string. If one is not found, it returns NULL.
6208 Else, it returns a pointer to the parsed filename. (This function
6209 makes no attempt to verify that a file of that name exists, or is
6210 accessible.) And, it updates arg to point to the first character
6211 following the parsed filename in the arg string.
6213 Note that clients needing to preserve the returned filename for
6214 future access should copy it to their own buffers. */
6216 ep_parse_optional_filename (char **arg
)
6218 static char filename
[1024];
6223 if ((*arg_p
== '\0') || isspace (*arg_p
))
6241 /* Commands to deal with catching events, such as signals, exceptions,
6242 process start/exit, etc. */
6246 catch_fork
, catch_vfork
6251 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6254 char *cond_string
= NULL
;
6256 ep_skip_leading_whitespace (&arg
);
6258 /* The allowed syntax is:
6260 catch [v]fork if <cond>
6262 First, check if there's an if clause. */
6263 cond_string
= ep_parse_optional_if_clause (&arg
);
6265 if ((*arg
!= '\0') && !isspace (*arg
))
6266 error (_("Junk at end of arguments."));
6268 /* If this target supports it, create a fork or vfork catchpoint
6269 and enable reporting of such events. */
6273 create_fork_event_catchpoint (tempflag
, cond_string
);
6276 create_vfork_event_catchpoint (tempflag
, cond_string
);
6279 error (_("unsupported or unknown fork kind; cannot catch it"));
6285 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6287 char *cond_string
= NULL
;
6289 ep_skip_leading_whitespace (&arg
);
6291 /* The allowed syntax is:
6293 catch exec if <cond>
6295 First, check if there's an if clause. */
6296 cond_string
= ep_parse_optional_if_clause (&arg
);
6298 if ((*arg
!= '\0') && !isspace (*arg
))
6299 error (_("Junk at end of arguments."));
6301 /* If this target supports it, create an exec catchpoint
6302 and enable reporting of such events. */
6303 create_exec_event_catchpoint (tempflag
, cond_string
);
6307 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6309 char *dll_pathname
= NULL
;
6310 char *cond_string
= NULL
;
6312 ep_skip_leading_whitespace (&arg
);
6314 /* The allowed syntax is:
6316 catch load if <cond>
6317 catch load <filename>
6318 catch load <filename> if <cond>
6320 The user is not allowed to specify the <filename> after an
6323 We'll ignore the pathological case of a file named "if".
6325 First, check if there's an if clause. If so, then there
6326 cannot be a filename. */
6327 cond_string
= ep_parse_optional_if_clause (&arg
);
6329 /* If there was an if clause, then there cannot be a filename.
6330 Else, there might be a filename and an if clause. */
6331 if (cond_string
== NULL
)
6333 dll_pathname
= ep_parse_optional_filename (&arg
);
6334 ep_skip_leading_whitespace (&arg
);
6335 cond_string
= ep_parse_optional_if_clause (&arg
);
6338 if ((*arg
!= '\0') && !isspace (*arg
))
6339 error (_("Junk at end of arguments."));
6341 /* Create a load breakpoint that only triggers when a load of
6342 the specified dll (or any dll, if no pathname was specified)
6344 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6345 dll_pathname
, cond_string
);
6349 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6351 char *dll_pathname
= NULL
;
6352 char *cond_string
= NULL
;
6354 ep_skip_leading_whitespace (&arg
);
6356 /* The allowed syntax is:
6358 catch unload if <cond>
6359 catch unload <filename>
6360 catch unload <filename> if <cond>
6362 The user is not allowed to specify the <filename> after an
6365 We'll ignore the pathological case of a file named "if".
6367 First, check if there's an if clause. If so, then there
6368 cannot be a filename. */
6369 cond_string
= ep_parse_optional_if_clause (&arg
);
6371 /* If there was an if clause, then there cannot be a filename.
6372 Else, there might be a filename and an if clause. */
6373 if (cond_string
== NULL
)
6375 dll_pathname
= ep_parse_optional_filename (&arg
);
6376 ep_skip_leading_whitespace (&arg
);
6377 cond_string
= ep_parse_optional_if_clause (&arg
);
6380 if ((*arg
!= '\0') && !isspace (*arg
))
6381 error (_("Junk at end of arguments."));
6383 /* Create an unload breakpoint that only triggers when an unload of
6384 the specified dll (or any dll, if no pathname was specified)
6386 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6387 dll_pathname
, cond_string
);
6390 static enum print_stop_action
6391 print_exception_catchpoint (struct breakpoint
*b
)
6393 annotate_catchpoint (b
->number
);
6395 if (strstr (b
->addr_string
, "throw") != NULL
)
6396 printf_filtered (_("\nCatchpoint %d (exception thrown)\n"),
6399 printf_filtered (_("\nCatchpoint %d (exception caught)\n"),
6402 return PRINT_SRC_AND_LOC
;
6406 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6411 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6414 *last_addr
= b
->loc
->address
;
6415 if (strstr (b
->addr_string
, "throw") != NULL
)
6416 ui_out_field_string (uiout
, "what", "exception throw");
6418 ui_out_field_string (uiout
, "what", "exception catch");
6422 print_mention_exception_catchpoint (struct breakpoint
*b
)
6424 if (strstr (b
->addr_string
, "throw") != NULL
)
6425 printf_filtered (_("Catchpoint %d (throw)"), b
->number
);
6427 printf_filtered (_("Catchpoint %d (catch)"), b
->number
);
6430 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6431 print_exception_catchpoint
,
6432 print_one_exception_catchpoint
,
6433 print_mention_exception_catchpoint
6437 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6438 enum exception_event_kind ex_event
, int from_tty
)
6440 char *trigger_func_name
, *nameptr
;
6441 struct symtabs_and_lines sals
;
6442 struct breakpoint
*b
;
6444 if (ex_event
== EX_EVENT_CATCH
)
6445 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6447 trigger_func_name
= xstrdup ("__cxa_throw");
6449 nameptr
= trigger_func_name
;
6450 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6451 if (sals
.nelts
== 0)
6453 xfree (trigger_func_name
);
6457 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6458 set_breakpoint_count (breakpoint_count
+ 1);
6459 b
->number
= breakpoint_count
;
6460 b
->cond_string
= (cond_string
== NULL
) ?
6461 NULL
: savestring (cond_string
, strlen (cond_string
));
6463 b
->addr_string
= trigger_func_name
;
6464 b
->enable_state
= bp_enabled
;
6465 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6466 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6473 /* Deal with "catch catch" and "catch throw" commands */
6476 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6477 int tempflag
, int from_tty
)
6479 char *cond_string
= NULL
;
6480 struct symtab_and_line
*sal
= NULL
;
6482 ep_skip_leading_whitespace (&arg
);
6484 cond_string
= ep_parse_optional_if_clause (&arg
);
6486 if ((*arg
!= '\0') && !isspace (*arg
))
6487 error (_("Junk at end of arguments."));
6489 if ((ex_event
!= EX_EVENT_THROW
) &&
6490 (ex_event
!= EX_EVENT_CATCH
))
6491 error (_("Unsupported or unknown exception event; cannot catch it"));
6493 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6496 warning (_("Unsupported with this platform/compiler combination."));
6499 /* Create a breakpoint struct for Ada exception catchpoints. */
6502 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6506 struct expression
*cond
,
6507 struct breakpoint_ops
*ops
,
6511 struct breakpoint
*b
;
6515 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6516 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6517 version for exception catchpoints, because two catchpoints
6518 used for different exception names will use the same address.
6519 In this case, a "breakpoint ... also set at..." warning is
6520 unproductive. Besides. the warning phrasing is also a bit
6521 inapropriate, we should use the word catchpoint, and tell
6522 the user what type of catchpoint it is. The above is good
6523 enough for now, though. */
6526 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6527 set_breakpoint_count (breakpoint_count
+ 1);
6529 b
->enable_state
= bp_enabled
;
6530 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6531 b
->number
= breakpoint_count
;
6532 b
->ignore_count
= 0;
6533 b
->loc
->cond
= cond
;
6534 b
->addr_string
= addr_string
;
6535 b
->language
= language_ada
;
6536 b
->cond_string
= cond_string
;
6537 b
->exp_string
= exp_string
;
6544 /* Implement the "catch exception" command. */
6547 catch_ada_exception_command (char *arg
, int tempflag
, int from_tty
)
6549 struct symtab_and_line sal
;
6551 char *addr_string
= NULL
;
6552 char *exp_string
= NULL
;
6553 char *cond_string
= NULL
;
6554 struct expression
*cond
= NULL
;
6555 struct breakpoint_ops
*ops
= NULL
;
6557 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6558 &cond_string
, &cond
, &ops
);
6559 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6560 cond_string
, cond
, ops
, tempflag
,
6564 /* Implement the "catch assert" command. */
6567 catch_assert_command (char *arg
, int tempflag
, int from_tty
)
6569 struct symtab_and_line sal
;
6570 char *addr_string
= NULL
;
6571 struct breakpoint_ops
*ops
= NULL
;
6573 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6574 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6575 tempflag
, from_tty
);
6579 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6582 /* The first argument may be an event name, such as "start" or "load".
6583 If so, then handle it as such. If it doesn't match an event name,
6584 then attempt to interpret it as an exception name. (This latter is
6585 the v4.16-and-earlier GDB meaning of the "catch" command.)
6587 First, try to find the bounds of what might be an event name. */
6588 char *arg1_start
= arg
;
6592 if (arg1_start
== NULL
)
6594 /* Old behaviour was to use pre-v-4.16 syntax */
6595 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6597 /* Now, this is not allowed */
6598 error (_("Catch requires an event name."));
6601 arg1_end
= ep_find_event_name_end (arg1_start
);
6602 if (arg1_end
== NULL
)
6603 error (_("catch requires an event"));
6604 arg1_length
= arg1_end
+ 1 - arg1_start
;
6606 /* Try to match what we found against known event names. */
6607 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6609 error (_("Catch of signal not yet implemented"));
6611 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6613 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6614 tempflag
, from_tty
);
6616 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6618 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6619 tempflag
, from_tty
);
6621 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6623 error (_("Catch of thread_start not yet implemented"));
6625 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6627 error (_("Catch of thread_exit not yet implemented"));
6629 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6631 error (_("Catch of thread_join not yet implemented"));
6633 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6635 error (_("Catch of start not yet implemented"));
6637 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6639 error (_("Catch of exit not yet implemented"));
6641 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6643 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6645 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6647 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6649 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6651 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6653 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6655 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6657 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6659 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6661 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6663 error (_("Catch of stop not yet implemented"));
6665 else if (strncmp (arg1_start
, "exception", arg1_length
) == 0)
6667 catch_ada_exception_command (arg1_end
+ 1, tempflag
, from_tty
);
6670 else if (strncmp (arg1_start
, "assert", arg1_length
) == 0)
6672 catch_assert_command (arg1_end
+ 1, tempflag
, from_tty
);
6675 /* This doesn't appear to be an event name */
6679 /* Pre-v.4.16 behaviour was to treat the argument
6680 as the name of an exception */
6681 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6682 /* Now this is not allowed */
6683 error (_("Unknown event kind specified for catch"));
6689 catch_command (char *arg
, int from_tty
)
6691 catch_command_1 (arg
, 0, from_tty
);
6696 tcatch_command (char *arg
, int from_tty
)
6698 catch_command_1 (arg
, 1, from_tty
);
6701 /* Delete breakpoints by address or line. */
6704 clear_command (char *arg
, int from_tty
)
6706 struct breakpoint
*b
;
6707 VEC(breakpoint_p
) *found
= 0;
6710 struct symtabs_and_lines sals
;
6711 struct symtab_and_line sal
;
6716 sals
= decode_line_spec (arg
, 1);
6721 sals
.sals
= (struct symtab_and_line
*)
6722 xmalloc (sizeof (struct symtab_and_line
));
6723 make_cleanup (xfree
, sals
.sals
);
6724 init_sal (&sal
); /* initialize to zeroes */
6725 sal
.line
= default_breakpoint_line
;
6726 sal
.symtab
= default_breakpoint_symtab
;
6727 sal
.pc
= default_breakpoint_address
;
6728 if (sal
.symtab
== 0)
6729 error (_("No source file specified."));
6737 /* We don't call resolve_sal_pc here. That's not
6738 as bad as it seems, because all existing breakpoints
6739 typically have both file/line and pc set. So, if
6740 clear is given file/line, we can match this to existing
6741 breakpoint without obtaining pc at all.
6743 We only support clearing given the address explicitly
6744 present in breakpoint table. Say, we've set breakpoint
6745 at file:line. There were several PC values for that file:line,
6746 due to optimization, all in one block.
6747 We've picked one PC value. If "clear" is issued with another
6748 PC corresponding to the same file:line, the breakpoint won't
6749 be cleared. We probably can still clear the breakpoint, but
6750 since the other PC value is never presented to user, user
6751 can only find it by guessing, and it does not seem important
6754 /* For each line spec given, delete bps which correspond
6755 to it. Do it in two passes, solely to preserve the current
6756 behavior that from_tty is forced true if we delete more than
6760 for (i
= 0; i
< sals
.nelts
; i
++)
6762 /* If exact pc given, clear bpts at that pc.
6763 If line given (pc == 0), clear all bpts on specified line.
6764 If defaulting, clear all bpts on default line
6767 defaulting sal.pc != 0 tests to do
6772 1 0 <can't happen> */
6776 /* Find all matching breakpoints and add them to
6781 /* Are we going to delete b? */
6782 if (b
->type
!= bp_none
6783 && b
->type
!= bp_watchpoint
6784 && b
->type
!= bp_hardware_watchpoint
6785 && b
->type
!= bp_read_watchpoint
6786 && b
->type
!= bp_access_watchpoint
)
6788 struct bp_location
*loc
= b
->loc
;
6789 for (; loc
; loc
= loc
->next
)
6791 int pc_match
= sal
.pc
6792 && (loc
->address
== sal
.pc
)
6793 && (!section_is_overlay (loc
->section
)
6794 || loc
->section
== sal
.section
);
6795 int line_match
= ((default_match
|| (0 == sal
.pc
))
6796 && b
->source_file
!= NULL
6797 && sal
.symtab
!= NULL
6798 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6799 && b
->line_number
== sal
.line
);
6800 if (pc_match
|| line_match
)
6809 VEC_safe_push(breakpoint_p
, found
, b
);
6812 /* Now go thru the 'found' chain and delete them. */
6813 if (VEC_empty(breakpoint_p
, found
))
6816 error (_("No breakpoint at %s."), arg
);
6818 error (_("No breakpoint at this line."));
6821 if (VEC_length(breakpoint_p
, found
) > 1)
6822 from_tty
= 1; /* Always report if deleted more than one */
6825 if (VEC_length(breakpoint_p
, found
) == 1)
6826 printf_unfiltered (_("Deleted breakpoint "));
6828 printf_unfiltered (_("Deleted breakpoints "));
6830 breakpoints_changed ();
6832 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6835 printf_unfiltered ("%d ", b
->number
);
6836 delete_breakpoint (b
);
6839 putchar_unfiltered ('\n');
6842 /* Delete breakpoint in BS if they are `delete' breakpoints and
6843 all breakpoints that are marked for deletion, whether hit or not.
6844 This is called after any breakpoint is hit, or after errors. */
6847 breakpoint_auto_delete (bpstat bs
)
6849 struct breakpoint
*b
, *temp
;
6851 for (; bs
; bs
= bs
->next
)
6852 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
->disposition
== disp_del
6854 delete_breakpoint (bs
->breakpoint_at
->owner
);
6856 ALL_BREAKPOINTS_SAFE (b
, temp
)
6858 if (b
->disposition
== disp_del_at_next_stop
)
6859 delete_breakpoint (b
);
6863 /* Remove locations of breakpoint BPT from
6864 the global list of breakpoint locations. */
6867 unlink_locations_from_global_list (struct breakpoint
*bpt
)
6869 /* This code assumes that the locations
6870 of a breakpoint are found in the global list
6871 in the same order, but not necessary adjacent. */
6872 struct bp_location
**tmp
= &bp_location_chain
;
6873 struct bp_location
*here
= bpt
->loc
;
6878 for (; *tmp
&& here
;)
6882 *tmp
= here
->global_next
;
6887 tmp
= &((*tmp
)->global_next
);
6892 /* Delete a breakpoint and clean up all traces of it in the data
6896 delete_breakpoint (struct breakpoint
*bpt
)
6898 struct breakpoint
*b
;
6900 struct bp_location
*loc
;
6902 gdb_assert (bpt
!= NULL
);
6904 /* Has this bp already been deleted? This can happen because multiple
6905 lists can hold pointers to bp's. bpstat lists are especial culprits.
6907 One example of this happening is a watchpoint's scope bp. When the
6908 scope bp triggers, we notice that the watchpoint is out of scope, and
6909 delete it. We also delete its scope bp. But the scope bp is marked
6910 "auto-deleting", and is already on a bpstat. That bpstat is then
6911 checked for auto-deleting bp's, which are deleted.
6913 A real solution to this problem might involve reference counts in bp's,
6914 and/or giving them pointers back to their referencing bpstat's, and
6915 teaching delete_breakpoint to only free a bp's storage when no more
6916 references were extent. A cheaper bandaid was chosen. */
6917 if (bpt
->type
== bp_none
)
6920 if (deprecated_delete_breakpoint_hook
)
6921 deprecated_delete_breakpoint_hook (bpt
);
6922 breakpoint_delete_event (bpt
->number
);
6924 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
6927 remove_breakpoint (loc
, mark_inserted
);
6932 if (loc
->function_name
)
6933 xfree (loc
->function_name
);
6936 if (breakpoint_chain
== bpt
)
6937 breakpoint_chain
= bpt
->next
;
6942 b
->next
= bpt
->next
;
6946 unlink_locations_from_global_list (bpt
);
6948 check_duplicates (bpt
);
6950 if (bpt
->type
!= bp_hardware_watchpoint
6951 && bpt
->type
!= bp_read_watchpoint
6952 && bpt
->type
!= bp_access_watchpoint
6953 && bpt
->type
!= bp_catch_fork
6954 && bpt
->type
!= bp_catch_vfork
6955 && bpt
->type
!= bp_catch_exec
)
6956 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
6958 /* If this breakpoint location was inserted, and there is
6959 another breakpoint at the same address, we need to
6960 insert the other breakpoint. */
6963 struct bp_location
*loc2
;
6964 ALL_BP_LOCATIONS (loc2
)
6965 if (loc2
->address
== loc
->address
6966 && loc2
->section
== loc
->section
6968 && loc2
->owner
->enable_state
!= bp_disabled
6970 && !loc2
->shlib_disabled
6971 && loc2
->owner
->enable_state
!= bp_call_disabled
)
6975 /* We should never reach this point if there is a permanent
6976 breakpoint at the same address as the one being deleted.
6977 If there is a permanent breakpoint somewhere, it should
6978 always be the only one inserted. */
6979 if (loc2
->owner
->enable_state
== bp_permanent
)
6980 internal_error (__FILE__
, __LINE__
,
6981 _("another breakpoint was inserted on top of "
6982 "a permanent breakpoint"));
6984 memset (&loc2
->target_info
, 0, sizeof (loc2
->target_info
));
6985 loc2
->target_info
.placed_address
= loc2
->address
;
6986 if (b
->type
== bp_hardware_breakpoint
)
6987 val
= target_insert_hw_breakpoint (&loc2
->target_info
);
6989 val
= target_insert_breakpoint (&loc2
->target_info
);
6991 /* If there was an error in the insert, print a message, then stop execution. */
6994 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6995 make_cleanup_ui_file_delete (tmp_error_stream
);
6998 if (b
->type
== bp_hardware_breakpoint
)
7000 fprintf_unfiltered (tmp_error_stream
,
7001 "Cannot insert hardware breakpoint %d.\n"
7002 "You may have requested too many hardware breakpoints.\n",
7007 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
7008 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
7009 fputs_filtered (paddress (loc2
->address
),
7011 fprintf_filtered (tmp_error_stream
, ": %s.\n",
7012 safe_strerror (val
));
7015 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
7016 target_terminal_ours_for_output ();
7017 error_stream(tmp_error_stream
);
7025 free_command_lines (&bpt
->commands
);
7026 if (bpt
->cond_string
!= NULL
)
7027 xfree (bpt
->cond_string
);
7028 if (bpt
->addr_string
!= NULL
)
7029 xfree (bpt
->addr_string
);
7030 if (bpt
->exp
!= NULL
)
7032 if (bpt
->exp_string
!= NULL
)
7033 xfree (bpt
->exp_string
);
7034 if (bpt
->val
!= NULL
)
7035 value_free (bpt
->val
);
7036 if (bpt
->source_file
!= NULL
)
7037 xfree (bpt
->source_file
);
7038 if (bpt
->dll_pathname
!= NULL
)
7039 xfree (bpt
->dll_pathname
);
7040 if (bpt
->triggered_dll_pathname
!= NULL
)
7041 xfree (bpt
->triggered_dll_pathname
);
7042 if (bpt
->exec_pathname
!= NULL
)
7043 xfree (bpt
->exec_pathname
);
7045 /* Be sure no bpstat's are pointing at it after it's been freed. */
7046 /* FIXME, how can we find all bpstat's?
7047 We just check stop_bpstat for now. Note that we cannot just
7048 remove bpstats pointing at bpt from the stop_bpstat list
7049 entirely, as breakpoint commands are associated with the bpstat;
7050 if we remove it here, then the later call to
7051 bpstat_do_actions (&stop_bpstat);
7052 in event-top.c won't do anything, and temporary breakpoints
7053 with commands won't work. */
7054 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
7055 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7057 bs
->breakpoint_at
= NULL
;
7059 /* bs->commands will be freed later. */
7061 /* On the chance that someone will soon try again to delete this same
7062 bp, we mark it as deleted before freeing its storage. */
7063 bpt
->type
= bp_none
;
7065 for (loc
= bpt
->loc
; loc
;)
7067 struct bp_location
*loc_next
= loc
->next
;
7075 do_delete_breakpoint_cleanup (void *b
)
7077 delete_breakpoint (b
);
7081 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7083 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7087 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
7089 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
7093 delete_command (char *arg
, int from_tty
)
7095 struct breakpoint
*b
, *temp
;
7101 int breaks_to_delete
= 0;
7103 /* Delete all breakpoints if no argument.
7104 Do not delete internal or call-dummy breakpoints, these
7105 have to be deleted with an explicit breakpoint number argument. */
7108 if (b
->type
!= bp_call_dummy
&&
7109 b
->type
!= bp_shlib_event
&&
7110 b
->type
!= bp_thread_event
&&
7111 b
->type
!= bp_overlay_event
&&
7114 breaks_to_delete
= 1;
7119 /* Ask user only if there are some breakpoints to delete. */
7121 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7123 ALL_BREAKPOINTS_SAFE (b
, temp
)
7125 if (b
->type
!= bp_call_dummy
&&
7126 b
->type
!= bp_shlib_event
&&
7127 b
->type
!= bp_thread_event
&&
7128 b
->type
!= bp_overlay_event
&&
7130 delete_breakpoint (b
);
7135 map_breakpoint_numbers (arg
, delete_breakpoint
);
7139 all_locations_are_pending (struct bp_location
*loc
)
7141 for (; loc
; loc
= loc
->next
)
7142 if (!loc
->shlib_disabled
)
7147 /* Subroutine of update_breakpoint_locations to simplify it.
7148 Return non-zero if multiple fns in list LOC have the same name.
7149 Null names are ignored. */
7152 ambiguous_names_p (struct bp_location
*loc
)
7154 struct bp_location
*l
;
7155 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7156 (int (*) (const void *, const void *)) streq
,
7157 NULL
, xcalloc
, xfree
);
7159 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7162 const char *name
= l
->function_name
;
7164 /* Allow for some names to be NULL, ignore them. */
7168 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7170 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7185 update_breakpoint_locations (struct breakpoint
*b
,
7186 struct symtabs_and_lines sals
)
7190 struct bp_location
*existing_locations
= b
->loc
;
7192 /* If there's no new locations, and all existing locations
7193 are pending, don't do anything. This optimizes
7194 the common case where all locations are in the same
7195 shared library, that was unloaded. We'd like to
7196 retain the location, so that when the library
7197 is loaded again, we don't loose the enabled/disabled
7198 status of the individual locations. */
7199 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7202 unlink_locations_from_global_list (b
);
7205 for (i
= 0; i
< sals
.nelts
; ++i
)
7207 struct bp_location
*new_loc
=
7208 add_location_to_breakpoint (b
, b
->type
, &(sals
.sals
[i
]));
7210 /* Reparse conditions, they might contain references to the
7212 if (b
->cond_string
!= NULL
)
7214 struct gdb_exception e
;
7217 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7219 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7224 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7225 b
->number
, e
.message
);
7226 new_loc
->enabled
= 0;
7230 if (b
->source_file
!= NULL
)
7231 xfree (b
->source_file
);
7232 if (sals
.sals
[i
].symtab
== NULL
)
7233 b
->source_file
= NULL
;
7236 savestring (sals
.sals
[i
].symtab
->filename
,
7237 strlen (sals
.sals
[i
].symtab
->filename
));
7239 if (b
->line_number
== 0)
7240 b
->line_number
= sals
.sals
[i
].line
;
7243 /* If possible, carry over 'disable' status from existing breakpoints. */
7245 struct bp_location
*e
= existing_locations
;
7246 /* If there are multiple breakpoints with the same function name,
7247 e.g. for inline functions, comparing function names won't work.
7248 Instead compare pc addresses; this is just a heuristic as things
7249 may have moved, but in practice it gives the correct answer
7250 often enough until a better solution is found. */
7251 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7253 for (; e
; e
= e
->next
)
7255 if (!e
->enabled
&& e
->function_name
)
7257 struct bp_location
*l
= b
->loc
;
7258 if (have_ambiguous_names
)
7260 for (; l
; l
= l
->next
)
7261 if (e
->address
== l
->address
)
7269 for (; l
; l
= l
->next
)
7270 if (l
->function_name
7271 && strcmp (e
->function_name
, l
->function_name
) == 0)
7281 while (existing_locations
)
7283 struct bp_location
*next
= existing_locations
->next
;
7284 free_bp_location (existing_locations
);
7285 existing_locations
= next
;
7290 /* Reset a breakpoint given it's struct breakpoint * BINT.
7291 The value we return ends up being the return value from catch_errors.
7292 Unused in this case. */
7295 breakpoint_re_set_one (void *bint
)
7297 /* get past catch_errs */
7298 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7302 int *not_found_ptr
= ¬_found
;
7303 struct symtabs_and_lines sals
= {};
7304 struct symtabs_and_lines expanded
;
7306 enum enable_state save_enable
;
7307 struct gdb_exception e
;
7313 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7317 case bp_hardware_breakpoint
:
7319 case bp_catch_unload
:
7320 if (b
->addr_string
== NULL
)
7322 /* Anything without a string can't be re-set. */
7323 delete_breakpoint (b
);
7327 set_language (b
->language
);
7328 input_radix
= b
->input_radix
;
7330 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7332 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7337 int not_found_and_ok
= 0;
7338 /* For pending breakpoints, it's expected that parsing
7339 will fail until the right shared library is loaded.
7340 User has already told to create pending breakpoints and
7341 don't need extra messages. If breakpoint is in bp_shlib_disabled
7342 state, then user already saw the message about that breakpoint
7343 being disabled, and don't want to see more errors. */
7345 && (b
->condition_not_parsed
7346 || (b
->loc
&& b
->loc
->shlib_disabled
)
7347 || b
->enable_state
== bp_disabled
))
7348 not_found_and_ok
= 1;
7350 if (!not_found_and_ok
)
7352 /* We surely don't want to warn about the same breakpoint
7353 10 times. One solution, implemented here, is disable
7354 the breakpoint on error. Another solution would be to
7355 have separate 'warning emitted' flag. Since this
7356 happens only when a binary has changed, I don't know
7357 which approach is better. */
7358 b
->enable_state
= bp_disabled
;
7359 throw_exception (e
);
7366 gdb_assert (sals
.nelts
== 1);
7367 resolve_sal_pc (&sals
.sals
[0]);
7368 if (b
->condition_not_parsed
&& s
&& s
[0])
7370 char *cond_string
= 0;
7372 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7373 &cond_string
, &thread
);
7375 b
->cond_string
= cond_string
;
7377 b
->condition_not_parsed
= 0;
7379 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7380 update_breakpoint_locations (b
, expanded
);
7382 /* Now that this is re-enabled, check_duplicates
7384 check_duplicates (b
);
7390 case bp_hardware_watchpoint
:
7391 case bp_read_watchpoint
:
7392 case bp_access_watchpoint
:
7393 /* Watchpoint can be either on expression using entirely global variables,
7394 or it can be on local variables.
7396 Watchpoints of the first kind are never auto-deleted, and even persist
7397 across program restarts. Since they can use variables from shared
7398 libraries, we need to reparse expression as libraries are loaded
7401 Watchpoints on local variables can also change meaning as result
7402 of solib event. For example, if a watchpoint uses both a local and
7403 a global variables in expression, it's a local watchpoint, but
7404 unloading of a shared library will make the expression invalid.
7405 This is not a very common use case, but we still re-evaluate
7406 expression, to avoid surprises to the user.
7408 Note that for local watchpoints, we re-evaluate it only if
7409 watchpoints frame id is still valid. If it's not, it means
7410 the watchpoint is out of scope and will be deleted soon. In fact,
7411 I'm not sure we'll ever be called in this case.
7413 If a local watchpoint's frame id is still valid, then
7414 b->exp_valid_block is likewise valid, and we can safely use it.
7416 Don't do anything about disabled watchpoints, since they will
7417 be reevaluated again when enabled. */
7418 update_watchpoint (b
, 1 /* reparse */);
7420 /* We needn't really do anything to reset these, since the mask
7421 that requests them is unaffected by e.g., new libraries being
7424 case bp_catch_vfork
:
7429 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7431 /* Delete longjmp and overlay event breakpoints; they will be
7432 reset later by breakpoint_re_set. */
7434 case bp_longjmp_resume
:
7435 case bp_overlay_event
:
7436 delete_breakpoint (b
);
7439 /* This breakpoint is special, it's set up when the inferior
7440 starts and we really don't want to touch it. */
7441 case bp_shlib_event
:
7443 /* Like bp_shlib_event, this breakpoint type is special.
7444 Once it is set up, we do not want to touch it. */
7445 case bp_thread_event
:
7447 /* Keep temporary breakpoints, which can be encountered when we step
7448 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7449 Otherwise these should have been blown away via the cleanup chain
7450 or by breakpoint_init_inferior when we rerun the executable. */
7453 case bp_watchpoint_scope
:
7455 case bp_step_resume
:
7462 /* Re-set all breakpoints after symbols have been re-loaded. */
7464 breakpoint_re_set (void)
7466 struct breakpoint
*b
, *temp
;
7467 enum language save_language
;
7468 int save_input_radix
;
7470 save_language
= current_language
->la_language
;
7471 save_input_radix
= input_radix
;
7472 ALL_BREAKPOINTS_SAFE (b
, temp
)
7474 /* Format possible error msg */
7475 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7477 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7478 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7479 do_cleanups (cleanups
);
7481 set_language (save_language
);
7482 input_radix
= save_input_radix
;
7484 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
7486 create_longjmp_breakpoint ("longjmp");
7487 create_longjmp_breakpoint ("_longjmp");
7488 create_longjmp_breakpoint ("siglongjmp");
7489 create_longjmp_breakpoint ("_siglongjmp");
7490 create_longjmp_breakpoint (NULL
);
7493 create_overlay_event_breakpoint ("_ovly_debug_event");
7496 /* Reset the thread number of this breakpoint:
7498 - If the breakpoint is for all threads, leave it as-is.
7499 - Else, reset it to the current thread for inferior_ptid. */
7501 breakpoint_re_set_thread (struct breakpoint
*b
)
7503 if (b
->thread
!= -1)
7505 if (in_thread_list (inferior_ptid
))
7506 b
->thread
= pid_to_thread_id (inferior_ptid
);
7510 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7511 If from_tty is nonzero, it prints a message to that effect,
7512 which ends with a period (no newline). */
7515 set_ignore_count (int bptnum
, int count
, int from_tty
)
7517 struct breakpoint
*b
;
7523 if (b
->number
== bptnum
)
7525 b
->ignore_count
= count
;
7529 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7531 else if (count
== 1)
7532 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7535 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7538 breakpoints_changed ();
7539 breakpoint_modify_event (b
->number
);
7543 error (_("No breakpoint number %d."), bptnum
);
7546 /* Clear the ignore counts of all breakpoints. */
7548 breakpoint_clear_ignore_counts (void)
7550 struct breakpoint
*b
;
7553 b
->ignore_count
= 0;
7556 /* Command to set ignore-count of breakpoint N to COUNT. */
7559 ignore_command (char *args
, int from_tty
)
7565 error_no_arg (_("a breakpoint number"));
7567 num
= get_number (&p
);
7569 error (_("bad breakpoint number: '%s'"), args
);
7571 error (_("Second argument (specified ignore-count) is missing."));
7573 set_ignore_count (num
,
7574 longest_to_int (value_as_long (parse_and_eval (p
))),
7577 printf_filtered ("\n");
7580 /* Call FUNCTION on each of the breakpoints
7581 whose numbers are given in ARGS. */
7584 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7589 struct breakpoint
*b
, *tmp
;
7593 error_no_arg (_("one or more breakpoint numbers"));
7600 num
= get_number_or_range (&p1
);
7603 warning (_("bad breakpoint number at or near '%s'"), p
);
7607 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7608 if (b
->number
== num
)
7610 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7613 if (related_breakpoint
)
7614 function (related_breakpoint
);
7618 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7624 static struct bp_location
*
7625 find_location_by_number (char *number
)
7627 char *dot
= strchr (number
, '.');
7631 struct breakpoint
*b
;
7632 struct bp_location
*loc
;
7637 bp_num
= get_number_or_range (&p1
);
7639 error (_("Bad breakpoint number '%s'"), number
);
7642 if (b
->number
== bp_num
)
7647 if (!b
|| b
->number
!= bp_num
)
7648 error (_("Bad breakpoint number '%s'"), number
);
7651 loc_num
= get_number_or_range (&p1
);
7653 error (_("Bad breakpoint location number '%s'"), number
);
7657 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7660 error (_("Bad breakpoint location number '%s'"), dot
+1);
7666 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7667 If from_tty is nonzero, it prints a message to that effect,
7668 which ends with a period (no newline). */
7671 disable_breakpoint (struct breakpoint
*bpt
)
7673 /* Never disable a watchpoint scope breakpoint; we want to
7674 hit them when we leave scope so we can delete both the
7675 watchpoint and its scope breakpoint at that time. */
7676 if (bpt
->type
== bp_watchpoint_scope
)
7679 /* You can't disable permanent breakpoints. */
7680 if (bpt
->enable_state
== bp_permanent
)
7683 bpt
->enable_state
= bp_disabled
;
7685 check_duplicates (bpt
);
7687 if (deprecated_modify_breakpoint_hook
)
7688 deprecated_modify_breakpoint_hook (bpt
);
7689 breakpoint_modify_event (bpt
->number
);
7693 disable_command (char *args
, int from_tty
)
7695 struct breakpoint
*bpt
;
7697 ALL_BREAKPOINTS (bpt
)
7701 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7706 case bp_catch_unload
:
7708 case bp_catch_vfork
:
7710 case bp_hardware_breakpoint
:
7712 case bp_hardware_watchpoint
:
7713 case bp_read_watchpoint
:
7714 case bp_access_watchpoint
:
7715 disable_breakpoint (bpt
);
7719 else if (strchr (args
, '.'))
7721 struct bp_location
*loc
= find_location_by_number (args
);
7724 check_duplicates (loc
->owner
);
7727 map_breakpoint_numbers (args
, disable_breakpoint
);
7731 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7733 int target_resources_ok
, other_type_used
;
7736 if (bpt
->type
== bp_hardware_breakpoint
)
7739 i
= hw_breakpoint_used_count ();
7740 target_resources_ok
=
7741 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7743 if (target_resources_ok
== 0)
7744 error (_("No hardware breakpoint support in the target."));
7745 else if (target_resources_ok
< 0)
7746 error (_("Hardware breakpoints used exceeds limit."));
7749 if (bpt
->type
== bp_watchpoint
||
7750 bpt
->type
== bp_hardware_watchpoint
||
7751 bpt
->type
== bp_read_watchpoint
||
7752 bpt
->type
== bp_access_watchpoint
)
7754 struct frame_id saved_frame_id
;
7756 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7757 if (bpt
->exp_valid_block
!= NULL
)
7759 struct frame_info
*fr
=
7760 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7763 printf_filtered (_("\
7764 Cannot enable watchpoint %d because the block in which its expression\n\
7765 is valid is not currently in scope.\n"), bpt
->number
);
7772 value_free (bpt
->val
);
7773 mark
= value_mark ();
7774 fetch_watchpoint_value (bpt
->exp
, &bpt
->val
, NULL
, NULL
);
7776 release_value (bpt
->val
);
7779 if (bpt
->type
== bp_hardware_watchpoint
||
7780 bpt
->type
== bp_read_watchpoint
||
7781 bpt
->type
== bp_access_watchpoint
)
7783 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7784 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7786 /* Hack around 'unused var' error for some targets here */
7787 (void) mem_cnt
, (void) i
;
7788 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7789 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7790 /* we can consider of type is bp_hardware_watchpoint, convert to
7791 bp_watchpoint in the following condition */
7792 if (target_resources_ok
< 0)
7794 printf_filtered (_("\
7795 Cannot enable watchpoint %d because target watch resources\n\
7796 have been allocated for other watchpoints.\n"), bpt
->number
);
7797 value_free_to_mark (mark
);
7802 select_frame (frame_find_by_id (saved_frame_id
));
7803 value_free_to_mark (mark
);
7806 if (bpt
->enable_state
!= bp_permanent
)
7807 bpt
->enable_state
= bp_enabled
;
7808 bpt
->disposition
= disposition
;
7809 check_duplicates (bpt
);
7810 breakpoints_changed ();
7812 if (deprecated_modify_breakpoint_hook
)
7813 deprecated_modify_breakpoint_hook (bpt
);
7814 breakpoint_modify_event (bpt
->number
);
7819 enable_breakpoint (struct breakpoint
*bpt
)
7821 do_enable_breakpoint (bpt
, bpt
->disposition
);
7824 /* The enable command enables the specified breakpoints (or all defined
7825 breakpoints) so they once again become (or continue to be) effective
7826 in stopping the inferior. */
7829 enable_command (char *args
, int from_tty
)
7831 struct breakpoint
*bpt
;
7833 ALL_BREAKPOINTS (bpt
)
7837 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7842 case bp_catch_unload
:
7844 case bp_catch_vfork
:
7846 case bp_hardware_breakpoint
:
7848 case bp_hardware_watchpoint
:
7849 case bp_read_watchpoint
:
7850 case bp_access_watchpoint
:
7851 enable_breakpoint (bpt
);
7855 else if (strchr (args
, '.'))
7857 struct bp_location
*loc
= find_location_by_number (args
);
7860 check_duplicates (loc
->owner
);
7863 map_breakpoint_numbers (args
, enable_breakpoint
);
7867 enable_once_breakpoint (struct breakpoint
*bpt
)
7869 do_enable_breakpoint (bpt
, disp_disable
);
7873 enable_once_command (char *args
, int from_tty
)
7875 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7879 enable_delete_breakpoint (struct breakpoint
*bpt
)
7881 do_enable_breakpoint (bpt
, disp_del
);
7885 enable_delete_command (char *args
, int from_tty
)
7887 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7891 set_breakpoint_cmd (char *args
, int from_tty
)
7896 show_breakpoint_cmd (char *args
, int from_tty
)
7900 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7902 struct symtabs_and_lines
7903 decode_line_spec_1 (char *string
, int funfirstline
)
7905 struct symtabs_and_lines sals
;
7907 error (_("Empty line specification."));
7908 if (default_breakpoint_valid
)
7909 sals
= decode_line_1 (&string
, funfirstline
,
7910 default_breakpoint_symtab
,
7911 default_breakpoint_line
,
7912 (char ***) NULL
, NULL
);
7914 sals
= decode_line_1 (&string
, funfirstline
,
7915 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7917 error (_("Junk at end of line specification: %s"), string
);
7921 /* Create and insert a raw software breakpoint at PC. Return an
7922 identifier, which should be used to remove the breakpoint later.
7923 In general, places which call this should be using something on the
7924 breakpoint chain instead; this function should be eliminated
7928 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
7930 struct bp_target_info
*bp_tgt
;
7932 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
7933 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
7935 bp_tgt
->placed_address
= pc
;
7936 if (target_insert_breakpoint (bp_tgt
) != 0)
7938 /* Could not insert the breakpoint. */
7946 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
7949 deprecated_remove_raw_breakpoint (void *bp
)
7951 struct bp_target_info
*bp_tgt
= bp
;
7954 ret
= target_remove_breakpoint (bp_tgt
);
7960 /* One (or perhaps two) breakpoints used for software single stepping. */
7962 static void *single_step_breakpoints
[2];
7964 /* Create and insert a breakpoint for software single step. */
7967 insert_single_step_breakpoint (CORE_ADDR next_pc
)
7971 if (single_step_breakpoints
[0] == NULL
)
7972 bpt_p
= &single_step_breakpoints
[0];
7975 gdb_assert (single_step_breakpoints
[1] == NULL
);
7976 bpt_p
= &single_step_breakpoints
[1];
7979 /* NOTE drow/2006-04-11: A future improvement to this function would be
7980 to only create the breakpoints once, and actually put them on the
7981 breakpoint chain. That would let us use set_raw_breakpoint. We could
7982 adjust the addresses each time they were needed. Doing this requires
7983 corresponding changes elsewhere where single step breakpoints are
7984 handled, however. So, for now, we use this. */
7986 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
7988 error (_("Could not insert single-step breakpoint at 0x%s"),
7989 paddr_nz (next_pc
));
7992 /* Remove and delete any breakpoints used for software single step. */
7995 remove_single_step_breakpoints (void)
7997 gdb_assert (single_step_breakpoints
[0] != NULL
);
7999 /* See insert_single_step_breakpoint for more about this deprecated
8001 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8002 single_step_breakpoints
[0] = NULL
;
8004 if (single_step_breakpoints
[1] != NULL
)
8006 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8007 single_step_breakpoints
[1] = NULL
;
8011 /* Check whether a software single-step breakpoint is inserted at PC. */
8014 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8018 for (i
= 0; i
< 2; i
++)
8020 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8021 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8029 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8030 It is defined as a macro to prevent duplication.
8031 COMMAND should be a string constant containing the name of the command. */
8032 #define BREAK_ARGS_HELP(command) \
8033 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8034 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8035 If a line number is specified, break at start of code for that line.\n\
8036 If a function is specified, break at start of code for that function.\n\
8037 If an address is specified, break at that exact address.\n\
8038 With no LOCATION, uses current execution address of selected stack frame.\n\
8039 This is useful for breaking on return to a stack frame.\n\
8041 THREADNUM is the number from \"info threads\".\n\
8042 CONDITION is a boolean expression.\n\
8044 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8046 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8049 _initialize_breakpoint (void)
8051 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8052 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8053 struct cmd_list_element
*c
;
8055 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8057 breakpoint_chain
= 0;
8058 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8059 before a breakpoint is set. */
8060 breakpoint_count
= 0;
8062 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8063 Set ignore-count of breakpoint number N to COUNT.\n\
8064 Usage is `ignore N COUNT'."));
8066 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8068 add_com ("commands", class_breakpoint
, commands_command
, _("\
8069 Set commands to be executed when a breakpoint is hit.\n\
8070 Give breakpoint number as argument after \"commands\".\n\
8071 With no argument, the targeted breakpoint is the last one set.\n\
8072 The commands themselves follow starting on the next line.\n\
8073 Type a line containing \"end\" to indicate the end of them.\n\
8074 Give \"silent\" as the first line to make the breakpoint silent;\n\
8075 then no output is printed when it is hit, except what the commands print."));
8077 add_com ("condition", class_breakpoint
, condition_command
, _("\
8078 Specify breakpoint number N to break only if COND is true.\n\
8079 Usage is `condition N COND', where N is an integer and COND is an\n\
8080 expression to be evaluated whenever breakpoint N is reached."));
8082 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8083 Set a temporary breakpoint.\n\
8084 Like \"break\" except the breakpoint is only temporary,\n\
8085 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8086 by using \"enable delete\" on the breakpoint number.\n\
8088 BREAK_ARGS_HELP ("tbreak")));
8089 set_cmd_completer (c
, location_completer
);
8091 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8092 Set a hardware assisted breakpoint.\n\
8093 Like \"break\" except the breakpoint requires hardware support,\n\
8094 some target hardware may not have this support.\n\
8096 BREAK_ARGS_HELP ("hbreak")));
8097 set_cmd_completer (c
, location_completer
);
8099 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8100 Set a temporary hardware assisted breakpoint.\n\
8101 Like \"hbreak\" except the breakpoint is only temporary,\n\
8102 so it will be deleted when hit.\n\
8104 BREAK_ARGS_HELP ("thbreak")));
8105 set_cmd_completer (c
, location_completer
);
8107 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8108 Enable some breakpoints.\n\
8109 Give breakpoint numbers (separated by spaces) as arguments.\n\
8110 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8111 This is used to cancel the effect of the \"disable\" command.\n\
8112 With a subcommand you can enable temporarily."),
8113 &enablelist
, "enable ", 1, &cmdlist
);
8115 add_com ("ab", class_breakpoint
, enable_command
, _("\
8116 Enable some breakpoints.\n\
8117 Give breakpoint numbers (separated by spaces) as arguments.\n\
8118 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8119 This is used to cancel the effect of the \"disable\" command.\n\
8120 With a subcommand you can enable temporarily."));
8122 add_com_alias ("en", "enable", class_breakpoint
, 1);
8124 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8125 Enable some breakpoints.\n\
8126 Give breakpoint numbers (separated by spaces) as arguments.\n\
8127 This is used to cancel the effect of the \"disable\" command.\n\
8128 May be abbreviated to simply \"enable\".\n"),
8129 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8131 add_cmd ("once", no_class
, enable_once_command
, _("\
8132 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8133 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8136 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8137 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8138 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8141 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8142 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8143 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8146 add_cmd ("once", no_class
, enable_once_command
, _("\
8147 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8148 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8151 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8152 Disable some breakpoints.\n\
8153 Arguments are breakpoint numbers with spaces in between.\n\
8154 To disable all breakpoints, give no argument.\n\
8155 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8156 &disablelist
, "disable ", 1, &cmdlist
);
8157 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8158 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8160 add_com ("sb", class_breakpoint
, disable_command
, _("\
8161 Disable some breakpoints.\n\
8162 Arguments are breakpoint numbers with spaces in between.\n\
8163 To disable all breakpoints, give no argument.\n\
8164 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8166 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8167 Disable some breakpoints.\n\
8168 Arguments are breakpoint numbers with spaces in between.\n\
8169 To disable all breakpoints, give no argument.\n\
8170 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8171 This command may be abbreviated \"disable\"."),
8174 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8175 Delete some breakpoints or auto-display expressions.\n\
8176 Arguments are breakpoint numbers with spaces in between.\n\
8177 To delete all breakpoints, give no argument.\n\
8179 Also a prefix command for deletion of other GDB objects.\n\
8180 The \"unset\" command is also an alias for \"delete\"."),
8181 &deletelist
, "delete ", 1, &cmdlist
);
8182 add_com_alias ("d", "delete", class_breakpoint
, 1);
8183 add_com_alias ("del", "delete", class_breakpoint
, 1);
8185 add_com ("db", class_breakpoint
, delete_command
, _("\
8186 Delete some breakpoints.\n\
8187 Arguments are breakpoint numbers with spaces in between.\n\
8188 To delete all breakpoints, give no argument.\n"));
8190 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8191 Delete some breakpoints or auto-display expressions.\n\
8192 Arguments are breakpoint numbers with spaces in between.\n\
8193 To delete all breakpoints, give no argument.\n\
8194 This command may be abbreviated \"delete\"."),
8197 add_com ("clear", class_breakpoint
, clear_command
, _("\
8198 Clear breakpoint at specified line or function.\n\
8199 Argument may be line number, function name, or \"*\" and an address.\n\
8200 If line number is specified, all breakpoints in that line are cleared.\n\
8201 If function is specified, breakpoints at beginning of function are cleared.\n\
8202 If an address is specified, breakpoints at that address are cleared.\n\
8204 With no argument, clears all breakpoints in the line that the selected frame\n\
8207 See also the \"delete\" command which clears breakpoints by number."));
8209 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8210 Set breakpoint at specified line or function.\n"
8211 BREAK_ARGS_HELP ("break")));
8212 set_cmd_completer (c
, location_completer
);
8214 add_com_alias ("b", "break", class_run
, 1);
8215 add_com_alias ("br", "break", class_run
, 1);
8216 add_com_alias ("bre", "break", class_run
, 1);
8217 add_com_alias ("brea", "break", class_run
, 1);
8221 add_com_alias ("ba", "break", class_breakpoint
, 1);
8222 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8227 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8228 Break in function/address or break at a line in the current file."),
8229 &stoplist
, "stop ", 1, &cmdlist
);
8230 add_cmd ("in", class_breakpoint
, stopin_command
,
8231 _("Break in function or address."), &stoplist
);
8232 add_cmd ("at", class_breakpoint
, stopat_command
,
8233 _("Break at a line in the current file."), &stoplist
);
8234 add_com ("status", class_info
, breakpoints_info
, _("\
8235 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8236 The \"Type\" column indicates one of:\n\
8237 \tbreakpoint - normal breakpoint\n\
8238 \twatchpoint - watchpoint\n\
8239 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8240 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8241 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8242 address and file/line number respectively.\n\
8244 Convenience variable \"$_\" and default examine address for \"x\"\n\
8245 are set to the address of the last breakpoint listed unless the command\n\
8246 is prefixed with \"server \".\n\n\
8247 Convenience variable \"$bpnum\" contains the number of the last\n\
8251 add_info ("breakpoints", breakpoints_info
, _("\
8252 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8253 The \"Type\" column indicates one of:\n\
8254 \tbreakpoint - normal breakpoint\n\
8255 \twatchpoint - watchpoint\n\
8256 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8257 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8258 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8259 address and file/line number respectively.\n\
8261 Convenience variable \"$_\" and default examine address for \"x\"\n\
8262 are set to the address of the last breakpoint listed unless the command\n\
8263 is prefixed with \"server \".\n\n\
8264 Convenience variable \"$bpnum\" contains the number of the last\n\
8268 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8269 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8270 The \"Type\" column indicates one of:\n\
8271 \tbreakpoint - normal breakpoint\n\
8272 \twatchpoint - watchpoint\n\
8273 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8274 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8275 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8276 address and file/line number respectively.\n\
8278 Convenience variable \"$_\" and default examine address for \"x\"\n\
8279 are set to the address of the last breakpoint listed unless the command\n\
8280 is prefixed with \"server \".\n\n\
8281 Convenience variable \"$bpnum\" contains the number of the last\n\
8284 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8285 Status of all breakpoints, or breakpoint number NUMBER.\n\
8286 The \"Type\" column indicates one of:\n\
8287 \tbreakpoint - normal breakpoint\n\
8288 \twatchpoint - watchpoint\n\
8289 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8290 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8291 \tuntil - internal breakpoint used by the \"until\" command\n\
8292 \tfinish - internal breakpoint used by the \"finish\" command\n\
8293 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8294 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8295 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8296 address and file/line number respectively.\n\
8298 Convenience variable \"$_\" and default examine address for \"x\"\n\
8299 are set to the address of the last breakpoint listed unless the command\n\
8300 is prefixed with \"server \".\n\n\
8301 Convenience variable \"$bpnum\" contains the number of the last\n\
8303 &maintenanceinfolist
);
8305 add_com ("catch", class_breakpoint
, catch_command
, _("\
8306 Set catchpoints to catch events.\n\
8307 Raised signals may be caught:\n\
8308 \tcatch signal - all signals\n\
8309 \tcatch signal <signame> - a particular signal\n\
8310 Raised exceptions may be caught:\n\
8311 \tcatch throw - all exceptions, when thrown\n\
8312 \tcatch throw <exceptname> - a particular exception, when thrown\n\
8313 \tcatch catch - all exceptions, when caught\n\
8314 \tcatch catch <exceptname> - a particular exception, when caught\n\
8315 Thread or process events may be caught:\n\
8316 \tcatch thread_start - any threads, just after creation\n\
8317 \tcatch thread_exit - any threads, just before expiration\n\
8318 \tcatch thread_join - any threads, just after joins\n\
8319 Process events may be caught:\n\
8320 \tcatch start - any processes, just after creation\n\
8321 \tcatch exit - any processes, just before expiration\n\
8322 \tcatch fork - calls to fork()\n\
8323 \tcatch vfork - calls to vfork()\n\
8324 \tcatch exec - calls to exec()\n\
8325 Dynamically-linked library events may be caught:\n\
8326 \tcatch load - loads of any library\n\
8327 \tcatch load <libname> - loads of a particular library\n\
8328 \tcatch unload - unloads of any library\n\
8329 \tcatch unload <libname> - unloads of a particular library\n\
8330 The act of your program's execution stopping may also be caught:\n\
8332 C++ exceptions may be caught:\n\
8333 \tcatch throw - all exceptions, when thrown\n\
8334 \tcatch catch - all exceptions, when caught\n\
8335 Ada exceptions may be caught:\n\
8336 \tcatch exception - all exceptions, when raised\n\
8337 \tcatch exception <name> - a particular exception, when raised\n\
8338 \tcatch exception unhandled - all unhandled exceptions, when raised\n\
8339 \tcatch assert - all failed assertions, when raised\n\
8341 Do \"help set follow-fork-mode\" for info on debugging your program\n\
8342 after a fork or vfork is caught.\n\n\
8343 Do \"help breakpoints\" for info on other commands dealing with breakpoints."));
8345 add_com ("tcatch", class_breakpoint
, tcatch_command
, _("\
8346 Set temporary catchpoints to catch events.\n\
8347 Args like \"catch\" command.\n\
8348 Like \"catch\" except the catchpoint is only temporary,\n\
8349 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
8350 by using \"enable delete\" on the catchpoint number."));
8352 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8353 Set a watchpoint for an expression.\n\
8354 A watchpoint stops execution of your program whenever the value of\n\
8355 an expression changes."));
8356 set_cmd_completer (c
, location_completer
);
8358 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8359 Set a read watchpoint for an expression.\n\
8360 A watchpoint stops execution of your program whenever the value of\n\
8361 an expression is read."));
8362 set_cmd_completer (c
, location_completer
);
8364 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8365 Set a watchpoint for an expression.\n\
8366 A watchpoint stops execution of your program whenever the value of\n\
8367 an expression is either read or written."));
8368 set_cmd_completer (c
, location_completer
);
8370 add_info ("watchpoints", breakpoints_info
,
8371 _("Synonym for ``info breakpoints''."));
8374 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8375 respond to changes - contrary to the description. */
8376 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8377 &can_use_hw_watchpoints
, _("\
8378 Set debugger's willingness to use watchpoint hardware."), _("\
8379 Show debugger's willingness to use watchpoint hardware."), _("\
8380 If zero, gdb will not use hardware for new watchpoints, even if\n\
8381 such is available. (However, any hardware watchpoints that were\n\
8382 created before setting this to nonzero, will continue to use watchpoint\n\
8385 show_can_use_hw_watchpoints
,
8386 &setlist
, &showlist
);
8388 can_use_hw_watchpoints
= 1;
8390 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8391 Breakpoint specific settings\n\
8392 Configure various breakpoint-specific variables such as\n\
8393 pending breakpoint behavior"),
8394 &breakpoint_set_cmdlist
, "set breakpoint ",
8395 0/*allow-unknown*/, &setlist
);
8396 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8397 Breakpoint specific settings\n\
8398 Configure various breakpoint-specific variables such as\n\
8399 pending breakpoint behavior"),
8400 &breakpoint_show_cmdlist
, "show breakpoint ",
8401 0/*allow-unknown*/, &showlist
);
8403 add_setshow_auto_boolean_cmd ("pending", no_class
,
8404 &pending_break_support
, _("\
8405 Set debugger's behavior regarding pending breakpoints."), _("\
8406 Show debugger's behavior regarding pending breakpoints."), _("\
8407 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8408 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8409 an error. If auto, an unrecognized breakpoint location results in a\n\
8410 user-query to see if a pending breakpoint should be created."),
8412 show_pending_break_support
,
8413 &breakpoint_set_cmdlist
,
8414 &breakpoint_show_cmdlist
);
8416 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8418 add_setshow_boolean_cmd ("auto-hw", no_class
,
8419 &automatic_hardware_breakpoints
, _("\
8420 Set automatic usage of hardware breakpoints."), _("\
8421 Show automatic usage of hardware breakpoints."), _("\
8422 If set, the debugger will automatically use hardware breakpoints for\n\
8423 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8424 a warning will be emitted for such breakpoints."),
8426 show_automatic_hardware_breakpoints
,
8427 &breakpoint_set_cmdlist
,
8428 &breakpoint_show_cmdlist
);
8430 automatic_hardware_breakpoints
= 1;