1 /* Everything about breakpoints, for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "breakpoint.h"
29 #include "expression.h"
35 #include "gdbthread.h"
38 #include "gdb_string.h"
45 #include "completer.h"
48 #include "cli/cli-script.h"
49 #include "gdb_assert.h"
54 #include "exceptions.h"
60 #include "mi/mi-common.h"
62 /* Arguments to pass as context to some catch command handlers. */
63 #define CATCH_PERMANENT ((void *) (uintptr_t) 0)
64 #define CATCH_TEMPORARY ((void *) (uintptr_t) 1)
66 /* Prototypes for local functions. */
68 static void enable_delete_command (char *, int);
70 static void enable_delete_breakpoint (struct breakpoint
*);
72 static void enable_once_command (char *, int);
74 static void enable_once_breakpoint (struct breakpoint
*);
76 static void disable_command (char *, int);
78 static void enable_command (char *, int);
80 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
82 static void ignore_command (char *, int);
84 static int breakpoint_re_set_one (void *);
86 static void clear_command (char *, int);
88 static void catch_command (char *, int);
90 static void watch_command (char *, int);
92 static int can_use_hardware_watchpoint (struct value
*);
94 static void break_command_1 (char *, int, int);
96 static void mention (struct breakpoint
*);
98 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
100 static void check_duplicates (struct breakpoint
*);
102 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
104 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
107 static void describe_other_breakpoints (CORE_ADDR
, struct obj_section
*, int);
109 static void breakpoints_info (char *, int);
111 static void breakpoint_1 (int, int);
113 static bpstat
bpstat_alloc (const struct bp_location
*, bpstat
);
115 static int breakpoint_cond_eval (void *);
117 static void cleanup_executing_breakpoints (void *);
119 static void commands_command (char *, int);
121 static void condition_command (char *, int);
123 static int get_number_trailer (char **, int);
125 void set_breakpoint_count (int);
134 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
136 static enum print_stop_action
print_it_typical (bpstat
);
138 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
140 static int watchpoint_check (void *);
142 static void maintenance_info_breakpoints (char *, int);
144 static void create_overlay_event_breakpoint (char *);
146 static int hw_breakpoint_used_count (void);
148 static int hw_watchpoint_used_count (enum bptype
, int *);
150 static void hbreak_command (char *, int);
152 static void thbreak_command (char *, int);
154 static void watch_command_1 (char *, int, int);
156 static void rwatch_command (char *, int);
158 static void awatch_command (char *, int);
160 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
162 static void create_fork_vfork_event_catchpoint (int tempflag
,
164 enum bptype bp_kind
);
166 static void stop_command (char *arg
, int from_tty
);
168 static void stopin_command (char *arg
, int from_tty
);
170 static void stopat_command (char *arg
, int from_tty
);
172 static char *ep_parse_optional_if_clause (char **arg
);
174 static char *ep_parse_optional_filename (char **arg
);
176 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
177 char *arg
, int tempflag
, int from_tty
);
179 static void tcatch_command (char *arg
, int from_tty
);
181 static void ep_skip_leading_whitespace (char **s
);
183 static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc
);
185 static void free_bp_location (struct bp_location
*loc
);
187 static struct bp_location
*
188 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
);
190 static void update_global_location_list (int);
192 static void update_global_location_list_nothrow (int);
194 static int is_hardware_watchpoint (struct breakpoint
*bpt
);
196 static void insert_breakpoint_locations (void);
199 bpdisp_text (enum bpdisp disp
)
201 /* NOTE: the following values are a part of MI protocol and represent
202 values of 'disp' field returned when inferior stops at a breakpoint. */
203 static char *bpdisps
[] = {"del", "dstp", "dis", "keep"};
204 return bpdisps
[(int) disp
];
207 /* Prototypes for exported functions. */
208 /* If FALSE, gdb will not use hardware support for watchpoints, even
209 if such is available. */
210 static int can_use_hw_watchpoints
;
213 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
214 struct cmd_list_element
*c
,
217 fprintf_filtered (file
, _("\
218 Debugger's willingness to use watchpoint hardware is %s.\n"),
222 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
223 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
224 for unrecognized breakpoint locations.
225 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
226 static enum auto_boolean pending_break_support
;
228 show_pending_break_support (struct ui_file
*file
, int from_tty
,
229 struct cmd_list_element
*c
,
232 fprintf_filtered (file
, _("\
233 Debugger's behavior regarding pending breakpoints is %s.\n"),
237 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
238 set with "break" but falling in read-only memory.
239 If 0, gdb will warn about such breakpoints, but won't automatically
240 use hardware breakpoints. */
241 static int automatic_hardware_breakpoints
;
243 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
244 struct cmd_list_element
*c
,
247 fprintf_filtered (file
, _("\
248 Automatic usage of hardware breakpoints is %s.\n"),
252 /* If on, gdb will keep breakpoints inserted even as inferior is
253 stopped, and immediately insert any new breakpoints. If off, gdb
254 will insert breakpoints into inferior only when resuming it, and
255 will remove breakpoints upon stop. If auto, GDB will behave as ON
256 if in non-stop mode, and as OFF if all-stop mode.*/
258 static const char always_inserted_auto
[] = "auto";
259 static const char always_inserted_on
[] = "on";
260 static const char always_inserted_off
[] = "off";
261 static const char *always_inserted_enums
[] = {
262 always_inserted_auto
,
267 static const char *always_inserted_mode
= always_inserted_auto
;
269 show_always_inserted_mode (struct ui_file
*file
, int from_tty
,
270 struct cmd_list_element
*c
, const char *value
)
272 if (always_inserted_mode
== always_inserted_auto
)
273 fprintf_filtered (file
, _("\
274 Always inserted breakpoint mode is %s (currently %s).\n"),
276 breakpoints_always_inserted_mode () ? "on" : "off");
278 fprintf_filtered (file
, _("Always inserted breakpoint mode is %s.\n"), value
);
282 breakpoints_always_inserted_mode (void)
284 return (always_inserted_mode
== always_inserted_on
285 || (always_inserted_mode
== always_inserted_auto
&& non_stop
));
288 void _initialize_breakpoint (void);
290 extern int addressprint
; /* Print machine addresses? */
292 /* Are we executing breakpoint commands? */
293 static int executing_breakpoint_commands
;
295 /* Are overlay event breakpoints enabled? */
296 static int overlay_events_enabled
;
298 /* Walk the following statement or block through all breakpoints.
299 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
302 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
304 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
305 for (B = breakpoint_chain; \
306 B ? (TMP=B->next, 1): 0; \
309 /* Similar iterators for the low-level breakpoints. */
311 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->global_next)
313 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
314 for (B = bp_location_chain; \
315 B ? (TMP=B->global_next, 1): 0; \
318 /* True if breakpoint hit counts should be displayed in breakpoint info. */
320 int show_breakpoint_hit_counts
= 1;
322 /* Chains of all breakpoints defined. */
324 struct breakpoint
*breakpoint_chain
;
326 struct bp_location
*bp_location_chain
;
328 /* The locations that no longer correspond to any breakpoint,
329 unlinked from bp_location_chain, but for which a hit
330 may still be reported by a target. */
331 VEC(bp_location_p
) *moribund_locations
= NULL
;
333 /* Number of last breakpoint made. */
335 int breakpoint_count
;
337 /* This function returns a pointer to the string representation of the
338 pathname of the dynamically-linked library that has just been
341 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
342 or undefined results are guaranteed.
344 This string's contents are only valid immediately after the
345 inferior has stopped in the dynamic linker hook, and becomes
346 invalid as soon as the inferior is continued. Clients should make
347 a copy of this string if they wish to continue the inferior and
348 then access the string. */
350 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
351 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
354 /* This function returns a pointer to the string representation of the
355 pathname of the dynamically-linked library that has just been
358 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
359 TRUE, or undefined results are guaranteed.
361 This string's contents are only valid immediately after the
362 inferior has stopped in the dynamic linker hook, and becomes
363 invalid as soon as the inferior is continued. Clients should make
364 a copy of this string if they wish to continue the inferior and
365 then access the string. */
367 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
368 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
371 /* This function is called by the "catch load" command. It allows the
372 debugger to be notified by the dynamic linker when a specified
373 library file (or any library file, if filename is NULL) is loaded. */
375 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
376 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
377 error (_("catch of library loads not yet implemented on this platform"))
380 /* This function is called by the "catch unload" command. It allows
381 the debugger to be notified by the dynamic linker when a specified
382 library file (or any library file, if filename is NULL) is
385 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
386 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid, tempflag, filename, cond_string) \
387 error (_("catch of library unloads not yet implemented on this platform"))
390 /* Return whether a breakpoint is an active enabled breakpoint. */
392 breakpoint_enabled (struct breakpoint
*b
)
394 return (b
->enable_state
== bp_enabled
);
397 /* Set breakpoint count to NUM. */
400 set_breakpoint_count (int num
)
402 breakpoint_count
= num
;
403 set_internalvar (lookup_internalvar ("bpnum"),
404 value_from_longest (builtin_type_int32
, (LONGEST
) num
));
407 /* Used in run_command to zero the hit count when a new run starts. */
410 clear_breakpoint_hit_counts (void)
412 struct breakpoint
*b
;
418 /* Default address, symtab and line to put a breakpoint at
419 for "break" command with no arg.
420 if default_breakpoint_valid is zero, the other three are
421 not valid, and "break" with no arg is an error.
423 This set by print_stack_frame, which calls set_default_breakpoint. */
425 int default_breakpoint_valid
;
426 CORE_ADDR default_breakpoint_address
;
427 struct symtab
*default_breakpoint_symtab
;
428 int default_breakpoint_line
;
430 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
431 Advance *PP after the string and any trailing whitespace.
433 Currently the string can either be a number or "$" followed by the name
434 of a convenience variable. Making it an expression wouldn't work well
435 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
437 If the string is a NULL pointer, that denotes the last breakpoint.
439 TRAILER is a character which can be found after the number; most
440 commonly this is `-'. If you don't want a trailer, use \0. */
442 get_number_trailer (char **pp
, int trailer
)
444 int retval
= 0; /* default */
448 /* Empty line means refer to the last breakpoint. */
449 return breakpoint_count
;
452 /* Make a copy of the name, so we can null-terminate it
453 to pass to lookup_internalvar(). */
458 while (isalnum (*p
) || *p
== '_')
460 varname
= (char *) alloca (p
- start
+ 1);
461 strncpy (varname
, start
, p
- start
);
462 varname
[p
- start
] = '\0';
463 val
= value_of_internalvar (lookup_internalvar (varname
));
464 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
465 retval
= (int) value_as_long (val
);
468 printf_filtered (_("Convenience variable must have integer value.\n"));
476 while (*p
>= '0' && *p
<= '9')
479 /* There is no number here. (e.g. "cond a == b"). */
481 /* Skip non-numeric token */
482 while (*p
&& !isspace((int) *p
))
484 /* Return zero, which caller must interpret as error. */
490 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
492 /* Trailing junk: return 0 and let caller print error msg. */
493 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
504 /* Like get_number_trailer, but don't allow a trailer. */
506 get_number (char **pp
)
508 return get_number_trailer (pp
, '\0');
511 /* Parse a number or a range.
512 * A number will be of the form handled by get_number.
513 * A range will be of the form <number1> - <number2>, and
514 * will represent all the integers between number1 and number2,
517 * While processing a range, this fuction is called iteratively;
518 * At each call it will return the next value in the range.
520 * At the beginning of parsing a range, the char pointer PP will
521 * be advanced past <number1> and left pointing at the '-' token.
522 * Subsequent calls will not advance the pointer until the range
523 * is completed. The call that completes the range will advance
524 * pointer PP past <number2>.
528 get_number_or_range (char **pp
)
530 static int last_retval
, end_value
;
531 static char *end_ptr
;
532 static int in_range
= 0;
536 /* Default case: pp is pointing either to a solo number,
537 or to the first number of a range. */
538 last_retval
= get_number_trailer (pp
, '-');
543 /* This is the start of a range (<number1> - <number2>).
544 Skip the '-', parse and remember the second number,
545 and also remember the end of the final token. */
549 while (isspace ((int) *end_ptr
))
550 end_ptr
++; /* skip white space */
551 end_value
= get_number (temp
);
552 if (end_value
< last_retval
)
554 error (_("inverted range"));
556 else if (end_value
== last_retval
)
558 /* degenerate range (number1 == number2). Advance the
559 token pointer so that the range will be treated as a
568 error (_("negative value"));
571 /* pp points to the '-' that betokens a range. All
572 number-parsing has already been done. Return the next
573 integer value (one greater than the saved previous value).
574 Do not advance the token pointer 'pp' until the end of range
577 if (++last_retval
== end_value
)
579 /* End of range reached; advance token pointer. */
589 /* condition N EXP -- set break condition of breakpoint N to EXP. */
592 condition_command (char *arg
, int from_tty
)
594 struct breakpoint
*b
;
599 error_no_arg (_("breakpoint number"));
602 bnum
= get_number (&p
);
604 error (_("Bad breakpoint argument: '%s'"), arg
);
607 if (b
->number
== bnum
)
609 struct bp_location
*loc
= b
->loc
;
610 for (; loc
; loc
= loc
->next
)
618 if (b
->cond_string
!= NULL
)
619 xfree (b
->cond_string
);
623 b
->cond_string
= NULL
;
625 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
630 /* I don't know if it matters whether this is the string the user
631 typed in or the decompiled expression. */
632 b
->cond_string
= savestring (arg
, strlen (arg
));
633 b
->condition_not_parsed
= 0;
634 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
638 parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
640 error (_("Junk at end of expression"));
643 breakpoints_changed ();
644 observer_notify_breakpoint_modified (b
->number
);
648 error (_("No breakpoint number %d."), bnum
);
652 commands_command (char *arg
, int from_tty
)
654 struct breakpoint
*b
;
657 struct command_line
*l
;
659 /* If we allowed this, we would have problems with when to
660 free the storage, if we change the commands currently
663 if (executing_breakpoint_commands
)
664 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
667 bnum
= get_number (&p
);
670 error (_("Unexpected extra arguments following breakpoint number."));
673 if (b
->number
== bnum
)
675 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
677 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
678 l
= read_command_lines (tmpbuf
, from_tty
, 1);
679 do_cleanups (cleanups
);
680 free_command_lines (&b
->commands
);
682 breakpoints_changed ();
683 observer_notify_breakpoint_modified (b
->number
);
686 error (_("No breakpoint number %d."), bnum
);
689 /* Like commands_command, but instead of reading the commands from
690 input stream, takes them from an already parsed command structure.
692 This is used by cli-script.c to DTRT with breakpoint commands
693 that are part of if and while bodies. */
694 enum command_control_type
695 commands_from_control_command (char *arg
, struct command_line
*cmd
)
697 struct breakpoint
*b
;
701 /* If we allowed this, we would have problems with when to
702 free the storage, if we change the commands currently
705 if (executing_breakpoint_commands
)
706 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
708 /* An empty string for the breakpoint number means the last
709 breakpoint, but get_number expects a NULL pointer. */
714 bnum
= get_number (&p
);
717 error (_("Unexpected extra arguments following breakpoint number."));
720 if (b
->number
== bnum
)
722 free_command_lines (&b
->commands
);
723 if (cmd
->body_count
!= 1)
724 error (_("Invalid \"commands\" block structure."));
725 /* We need to copy the commands because if/while will free the
726 list after it finishes execution. */
727 b
->commands
= copy_command_lines (cmd
->body_list
[0]);
728 breakpoints_changed ();
729 observer_notify_breakpoint_modified (b
->number
);
730 return simple_control
;
732 error (_("No breakpoint number %d."), bnum
);
735 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
736 by replacing any memory breakpoints with their shadowed contents. */
739 breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
, LONGEST len
)
741 struct bp_location
*b
;
742 CORE_ADDR bp_addr
= 0;
748 if (b
->owner
->type
== bp_none
)
749 warning (_("reading through apparently deleted breakpoint #%d?"),
752 if (b
->loc_type
!= bp_loc_software_breakpoint
)
756 /* Addresses and length of the part of the breakpoint that
758 bp_addr
= b
->target_info
.placed_address
;
759 bp_size
= b
->target_info
.shadow_len
;
761 /* bp isn't valid, or doesn't shadow memory. */
764 if (bp_addr
+ bp_size
<= memaddr
)
765 /* The breakpoint is entirely before the chunk of memory we
769 if (bp_addr
>= memaddr
+ len
)
770 /* The breakpoint is entirely after the chunk of memory we are
774 /* Offset within shadow_contents. */
775 if (bp_addr
< memaddr
)
777 /* Only copy the second part of the breakpoint. */
778 bp_size
-= memaddr
- bp_addr
;
779 bptoffset
= memaddr
- bp_addr
;
783 if (bp_addr
+ bp_size
> memaddr
+ len
)
785 /* Only copy the first part of the breakpoint. */
786 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
789 memcpy (buf
+ bp_addr
- memaddr
,
790 b
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
795 /* A wrapper function for inserting catchpoints. */
797 insert_catchpoint (struct ui_out
*uo
, void *args
)
799 struct breakpoint
*b
= (struct breakpoint
*) args
;
805 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
808 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
811 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
814 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
820 is_hardware_watchpoint (struct breakpoint
*bpt
)
822 return (bpt
->type
== bp_hardware_watchpoint
823 || bpt
->type
== bp_read_watchpoint
824 || bpt
->type
== bp_access_watchpoint
);
827 /* Find the current value of a watchpoint on EXP. Return the value in
828 *VALP and *RESULTP and the chain of intermediate and final values
829 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
832 If an error occurs while evaluating the expression, *RESULTP will
833 be set to NULL. *RESULTP may be a lazy value, if the result could
834 not be read from memory. It is used to determine whether a value
835 is user-specified (we should watch the whole value) or intermediate
836 (we should watch only the bit used to locate the final value).
838 If the final value, or any intermediate value, could not be read
839 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
840 set to any referenced values. *VALP will never be a lazy value.
841 This is the value which we store in struct breakpoint.
843 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
844 value chain. The caller must free the values individually. If
845 VAL_CHAIN is NULL, all generated values will be left on the value
849 fetch_watchpoint_value (struct expression
*exp
, struct value
**valp
,
850 struct value
**resultp
, struct value
**val_chain
)
852 struct value
*mark
, *new_mark
, *result
;
860 /* Evaluate the expression. */
861 mark
= value_mark ();
863 gdb_evaluate_expression (exp
, &result
);
864 new_mark
= value_mark ();
865 if (mark
== new_mark
)
870 /* Make sure it's not lazy, so that after the target stops again we
871 have a non-lazy previous value to compare with. */
873 && (!value_lazy (result
) || gdb_value_fetch_lazy (result
)))
878 /* Return the chain of intermediate values. We use this to
879 decide which addresses to watch. */
880 *val_chain
= new_mark
;
881 value_release_to_mark (mark
);
885 /* Assuming that B is a hardware watchpoint:
886 - Reparse watchpoint expression, is REPARSE is non-zero
887 - Evaluate expression and store the result in B->val
888 - Update the list of values that must be watched in B->loc.
890 If the watchpoint is disabled, do nothing. If this is
891 local watchpoint that is out of scope, delete it. */
893 update_watchpoint (struct breakpoint
*b
, int reparse
)
895 int within_current_scope
;
896 struct frame_id saved_frame_id
;
897 struct bp_location
*loc
;
900 /* We don't free locations. They are stored in
901 bp_location_chain and update_global_locations will
902 eventually delete them and remove breakpoints if
906 if (b
->disposition
== disp_del_at_next_stop
)
909 /* Save the current frame's ID so we can restore it after
910 evaluating the watchpoint expression on its own frame. */
911 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
912 took a frame parameter, so that we didn't have to change the
914 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
916 /* Determine if the watchpoint is within scope. */
917 if (b
->exp_valid_block
== NULL
)
918 within_current_scope
= 1;
921 struct frame_info
*fi
;
922 fi
= frame_find_by_id (b
->watchpoint_frame
);
923 within_current_scope
= (fi
!= NULL
);
924 if (within_current_scope
)
928 if (within_current_scope
&& reparse
)
937 b
->exp
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
938 /* If the meaning of expression itself changed, the old value is
939 no longer relevant. We don't want to report a watchpoint hit
940 to the user when the old value and the new value may actually
941 be completely different objects. */
947 /* If we failed to parse the expression, for example because
948 it refers to a global variable in a not-yet-loaded shared library,
949 don't try to insert watchpoint. We don't automatically delete
950 such watchpoint, though, since failure to parse expression
951 is different from out-of-scope watchpoint. */
952 if (within_current_scope
&& b
->exp
)
954 struct value
*val_chain
, *v
, *result
, *next
;
956 fetch_watchpoint_value (b
->exp
, &v
, &result
, &val_chain
);
958 /* Avoid setting b->val if it's already set. The meaning of
959 b->val is 'the last value' user saw, and we should update
960 it only if we reported that last value to user. As it
961 happens, the code that reports it updates b->val directly. */
968 /* Look at each value on the value chain. */
969 for (v
= val_chain
; v
; v
= next
)
971 /* If it's a memory location, and GDB actually needed
972 its contents to evaluate the expression, then we
973 must watch it. If the first value returned is
974 still lazy, that means an error occurred reading it;
975 watch it anyway in case it becomes readable. */
976 if (VALUE_LVAL (v
) == lval_memory
977 && (v
== val_chain
|| ! value_lazy (v
)))
979 struct type
*vtype
= check_typedef (value_type (v
));
981 /* We only watch structs and arrays if user asked
982 for it explicitly, never if they just happen to
983 appear in the middle of some value chain. */
985 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
986 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
990 struct bp_location
*loc
, **tmp
;
992 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
993 len
= TYPE_LENGTH (value_type (v
));
995 if (b
->type
== bp_read_watchpoint
)
997 else if (b
->type
== bp_access_watchpoint
)
1000 loc
= allocate_bp_location (b
, bp_hardware_watchpoint
);
1001 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
1004 loc
->address
= addr
;
1006 loc
->watchpoint_type
= type
;
1010 next
= value_next (v
);
1015 /* We just regenerated the list of breakpoint locations.
1016 The new location does not have its condition field set to anything
1017 and therefore, we must always reparse the cond_string, independently
1018 of the value of the reparse flag. */
1019 if (b
->cond_string
!= NULL
)
1021 char *s
= b
->cond_string
;
1022 b
->loc
->cond
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
1025 else if (!within_current_scope
)
1027 printf_filtered (_("\
1028 Hardware watchpoint %d deleted because the program has left the block \n\
1029 in which its expression is valid.\n"),
1031 if (b
->related_breakpoint
)
1032 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1033 b
->disposition
= disp_del_at_next_stop
;
1036 /* Restore the selected frame. */
1037 select_frame (frame_find_by_id (saved_frame_id
));
1041 /* Returns 1 iff breakpoint location should be
1042 inserted in the inferior. */
1044 should_be_inserted (struct bp_location
*bpt
)
1046 if (!breakpoint_enabled (bpt
->owner
))
1049 if (bpt
->owner
->disposition
== disp_del_at_next_stop
)
1052 if (!bpt
->enabled
|| bpt
->shlib_disabled
|| bpt
->duplicate
)
1058 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1059 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1060 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
1062 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1063 method for each breakpoint or catchpoint type. */
1065 insert_bp_location (struct bp_location
*bpt
,
1066 struct ui_file
*tmp_error_stream
,
1067 int *disabled_breaks
, int *process_warning
,
1068 int *hw_breakpoint_error
)
1072 if (!should_be_inserted (bpt
) || bpt
->inserted
)
1075 /* Initialize the target-specific information. */
1076 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
1077 bpt
->target_info
.placed_address
= bpt
->address
;
1079 if (bpt
->loc_type
== bp_loc_software_breakpoint
1080 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1082 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
1084 /* If the explicitly specified breakpoint type
1085 is not hardware breakpoint, check the memory map to see
1086 if the breakpoint address is in read only memory or not.
1087 Two important cases are:
1088 - location type is not hardware breakpoint, memory
1089 is readonly. We change the type of the location to
1090 hardware breakpoint.
1091 - location type is hardware breakpoint, memory is read-write.
1092 This means we've previously made the location hardware one, but
1093 then the memory map changed, so we undo.
1095 When breakpoints are removed, remove_breakpoints will
1096 use location types we've just set here, the only possible
1097 problem is that memory map has changed during running program,
1098 but it's not going to work anyway with current gdb. */
1099 struct mem_region
*mr
1100 = lookup_mem_region (bpt
->target_info
.placed_address
);
1104 if (automatic_hardware_breakpoints
)
1107 enum bp_loc_type new_type
;
1109 if (mr
->attrib
.mode
!= MEM_RW
)
1110 new_type
= bp_loc_hardware_breakpoint
;
1112 new_type
= bp_loc_software_breakpoint
;
1114 if (new_type
!= bpt
->loc_type
)
1116 static int said
= 0;
1117 bpt
->loc_type
= new_type
;
1120 fprintf_filtered (gdb_stdout
, _("\
1121 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1126 else if (bpt
->loc_type
== bp_loc_software_breakpoint
1127 && mr
->attrib
.mode
!= MEM_RW
)
1128 warning (_("cannot set software breakpoint at readonly address %s"),
1129 paddr (bpt
->address
));
1133 /* First check to see if we have to handle an overlay. */
1134 if (overlay_debugging
== ovly_off
1135 || bpt
->section
== NULL
1136 || !(section_is_overlay (bpt
->section
)))
1138 /* No overlay handling: just set the breakpoint. */
1140 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1141 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1143 val
= target_insert_breakpoint (&bpt
->target_info
);
1147 /* This breakpoint is in an overlay section.
1148 Shall we set a breakpoint at the LMA? */
1149 if (!overlay_events_enabled
)
1151 /* Yes -- overlay event support is not active,
1152 so we must try to set a breakpoint at the LMA.
1153 This will not work for a hardware breakpoint. */
1154 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1155 warning (_("hardware breakpoint %d not supported in overlay!"),
1156 bpt
->owner
->number
);
1159 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
1161 /* Set a software (trap) breakpoint at the LMA. */
1162 bpt
->overlay_target_info
= bpt
->target_info
;
1163 bpt
->overlay_target_info
.placed_address
= addr
;
1164 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
1166 fprintf_unfiltered (tmp_error_stream
,
1167 "Overlay breakpoint %d failed: in ROM?",
1168 bpt
->owner
->number
);
1171 /* Shall we set a breakpoint at the VMA? */
1172 if (section_is_mapped (bpt
->section
))
1174 /* Yes. This overlay section is mapped into memory. */
1175 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1176 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1178 val
= target_insert_breakpoint (&bpt
->target_info
);
1182 /* No. This breakpoint will not be inserted.
1183 No error, but do not mark the bp as 'inserted'. */
1190 /* Can't set the breakpoint. */
1191 if (solib_address (bpt
->address
))
1193 /* See also: disable_breakpoints_in_shlibs. */
1195 bpt
->shlib_disabled
= 1;
1196 if (!*disabled_breaks
)
1198 fprintf_unfiltered (tmp_error_stream
,
1199 "Cannot insert breakpoint %d.\n",
1200 bpt
->owner
->number
);
1201 fprintf_unfiltered (tmp_error_stream
,
1202 "Temporarily disabling shared library breakpoints:\n");
1204 *disabled_breaks
= 1;
1205 fprintf_unfiltered (tmp_error_stream
,
1206 "breakpoint #%d\n", bpt
->owner
->number
);
1210 #ifdef ONE_PROCESS_WRITETEXT
1211 *process_warning
= 1;
1213 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1215 *hw_breakpoint_error
= 1;
1216 fprintf_unfiltered (tmp_error_stream
,
1217 "Cannot insert hardware breakpoint %d.\n",
1218 bpt
->owner
->number
);
1222 fprintf_unfiltered (tmp_error_stream
,
1223 "Cannot insert breakpoint %d.\n",
1224 bpt
->owner
->number
);
1225 fprintf_filtered (tmp_error_stream
,
1226 "Error accessing memory address ");
1227 fputs_filtered (paddress (bpt
->address
), tmp_error_stream
);
1228 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1229 safe_strerror (val
));
1240 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
1241 /* NOTE drow/2003-09-08: This state only exists for removing
1242 watchpoints. It's not clear that it's necessary... */
1243 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
1245 val
= target_insert_watchpoint (bpt
->address
,
1247 bpt
->watchpoint_type
);
1248 bpt
->inserted
= (val
!= -1);
1251 else if (bpt
->owner
->type
== bp_catch_fork
1252 || bpt
->owner
->type
== bp_catch_vfork
1253 || bpt
->owner
->type
== bp_catch_exec
)
1255 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1256 bpt
->owner
, RETURN_MASK_ERROR
);
1257 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1258 bpt
->owner
->number
);
1260 bpt
->owner
->enable_state
= bp_disabled
;
1264 /* We've already printed an error message if there was a problem
1265 inserting this catchpoint, and we've disabled the catchpoint,
1266 so just return success. */
1273 /* Make sure all breakpoints are inserted in inferior.
1274 Throws exception on any error.
1275 A breakpoint that is already inserted won't be inserted
1276 again, so calling this function twice is safe. */
1278 insert_breakpoints (void)
1280 struct breakpoint
*bpt
;
1282 ALL_BREAKPOINTS (bpt
)
1283 if (is_hardware_watchpoint (bpt
))
1284 update_watchpoint (bpt
, 0 /* don't reparse. */);
1286 update_global_location_list (1);
1288 if (!breakpoints_always_inserted_mode () && target_has_execution
)
1289 /* update_global_location_list does not insert breakpoints
1290 when always_inserted_mode is not enabled. Explicitly
1292 insert_breakpoint_locations ();
1295 /* insert_breakpoints is used when starting or continuing the program.
1296 remove_breakpoints is used when the program stops.
1297 Both return zero if successful,
1298 or an `errno' value if could not write the inferior. */
1301 insert_breakpoint_locations (void)
1303 struct breakpoint
*bpt
;
1304 struct bp_location
*b
, *temp
;
1307 int disabled_breaks
= 0;
1308 int hw_breakpoint_error
= 0;
1309 int process_warning
= 0;
1311 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1312 make_cleanup_ui_file_delete (tmp_error_stream
);
1314 /* Explicitly mark the warning -- this will only be printed if
1315 there was an error. */
1316 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1318 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1320 if (!should_be_inserted (b
) || b
->inserted
)
1323 /* There is no point inserting thread-specific breakpoints if the
1324 thread no longer exists. */
1325 if (b
->owner
->thread
!= -1
1326 && !valid_thread_id (b
->owner
->thread
))
1329 val
= insert_bp_location (b
, tmp_error_stream
,
1330 &disabled_breaks
, &process_warning
,
1331 &hw_breakpoint_error
);
1336 /* If we failed to insert all locations of a watchpoint,
1337 remove them, as half-inserted watchpoint is of limited use. */
1338 ALL_BREAKPOINTS (bpt
)
1340 int some_failed
= 0;
1341 struct bp_location
*loc
;
1343 if (!is_hardware_watchpoint (bpt
))
1346 if (!breakpoint_enabled (bpt
))
1349 if (bpt
->disposition
== disp_del_at_next_stop
)
1352 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1360 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1362 remove_breakpoint (loc
, mark_uninserted
);
1364 hw_breakpoint_error
= 1;
1365 fprintf_unfiltered (tmp_error_stream
,
1366 "Could not insert hardware watchpoint %d.\n",
1374 /* If a hardware breakpoint or watchpoint was inserted, add a
1375 message about possibly exhausted resources. */
1376 if (hw_breakpoint_error
)
1378 fprintf_unfiltered (tmp_error_stream
,
1379 "Could not insert hardware breakpoints:\n\
1380 You may have requested too many hardware breakpoints/watchpoints.\n");
1382 #ifdef ONE_PROCESS_WRITETEXT
1383 if (process_warning
)
1384 fprintf_unfiltered (tmp_error_stream
,
1385 "The same program may be running in another process.");
1387 target_terminal_ours_for_output ();
1388 error_stream (tmp_error_stream
);
1393 remove_breakpoints (void)
1395 struct bp_location
*b
;
1398 ALL_BP_LOCATIONS (b
)
1402 val
= remove_breakpoint (b
, mark_uninserted
);
1411 remove_hw_watchpoints (void)
1413 struct bp_location
*b
;
1416 ALL_BP_LOCATIONS (b
)
1418 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1420 val
= remove_breakpoint (b
, mark_uninserted
);
1429 reattach_breakpoints (int pid
)
1431 struct bp_location
*b
;
1433 struct cleanup
*old_chain
= save_inferior_ptid ();
1434 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1435 int dummy1
= 0, dummy2
= 0, dummy3
= 0;
1437 make_cleanup_ui_file_delete (tmp_error_stream
);
1439 inferior_ptid
= pid_to_ptid (pid
);
1440 ALL_BP_LOCATIONS (b
)
1445 val
= insert_bp_location (b
, tmp_error_stream
,
1446 &dummy1
, &dummy2
, &dummy3
);
1449 do_cleanups (old_chain
);
1454 do_cleanups (old_chain
);
1459 update_breakpoints_after_exec (void)
1461 struct breakpoint
*b
;
1462 struct breakpoint
*temp
;
1463 struct bp_location
*bploc
;
1465 /* We're about to delete breakpoints from GDB's lists. If the
1466 INSERTED flag is true, GDB will try to lift the breakpoints by
1467 writing the breakpoints' "shadow contents" back into memory. The
1468 "shadow contents" are NOT valid after an exec, so GDB should not
1469 do that. Instead, the target is responsible from marking
1470 breakpoints out as soon as it detects an exec. We don't do that
1471 here instead, because there may be other attempts to delete
1472 breakpoints after detecting an exec and before reaching here. */
1473 ALL_BP_LOCATIONS (bploc
)
1474 gdb_assert (!bploc
->inserted
);
1476 ALL_BREAKPOINTS_SAFE (b
, temp
)
1478 /* Solib breakpoints must be explicitly reset after an exec(). */
1479 if (b
->type
== bp_shlib_event
)
1481 delete_breakpoint (b
);
1485 /* Thread event breakpoints must be set anew after an exec(),
1486 as must overlay event breakpoints. */
1487 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1489 delete_breakpoint (b
);
1493 /* Step-resume breakpoints are meaningless after an exec(). */
1494 if (b
->type
== bp_step_resume
)
1496 delete_breakpoint (b
);
1500 /* Longjmp and longjmp-resume breakpoints are also meaningless
1502 if (b
->type
== bp_longjmp
|| b
->type
== bp_longjmp_resume
)
1504 delete_breakpoint (b
);
1508 /* Don't delete an exec catchpoint, because else the inferior
1509 won't stop when it ought!
1511 Similarly, we probably ought to keep vfork catchpoints, 'cause
1512 on this target, we may not be able to stop when the vfork is
1513 seen, but only when the subsequent exec is seen. (And because
1514 deleting fork catchpoints here but not vfork catchpoints will
1515 seem mysterious to users, keep those too.) */
1516 if ((b
->type
== bp_catch_exec
) ||
1517 (b
->type
== bp_catch_vfork
) ||
1518 (b
->type
== bp_catch_fork
))
1523 /* bp_finish is a special case. The only way we ought to be able
1524 to see one of these when an exec() has happened, is if the user
1525 caught a vfork, and then said "finish". Ordinarily a finish just
1526 carries them to the call-site of the current callee, by setting
1527 a temporary bp there and resuming. But in this case, the finish
1528 will carry them entirely through the vfork & exec.
1530 We don't want to allow a bp_finish to remain inserted now. But
1531 we can't safely delete it, 'cause finish_command has a handle to
1532 the bp on a bpstat, and will later want to delete it. There's a
1533 chance (and I've seen it happen) that if we delete the bp_finish
1534 here, that its storage will get reused by the time finish_command
1535 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1536 We really must allow finish_command to delete a bp_finish.
1538 In the absense of a general solution for the "how do we know
1539 it's safe to delete something others may have handles to?"
1540 problem, what we'll do here is just uninsert the bp_finish, and
1541 let finish_command delete it.
1543 (We know the bp_finish is "doomed" in the sense that it's
1544 momentary, and will be deleted as soon as finish_command sees
1545 the inferior stopped. So it doesn't matter that the bp's
1546 address is probably bogus in the new a.out, unlike e.g., the
1547 solib breakpoints.) */
1549 if (b
->type
== bp_finish
)
1554 /* Without a symbolic address, we have little hope of the
1555 pre-exec() address meaning the same thing in the post-exec()
1557 if (b
->addr_string
== NULL
)
1559 delete_breakpoint (b
);
1563 /* FIXME what about longjmp breakpoints? Re-create them here? */
1564 create_overlay_event_breakpoint ("_ovly_debug_event");
1568 detach_breakpoints (int pid
)
1570 struct bp_location
*b
;
1572 struct cleanup
*old_chain
= save_inferior_ptid ();
1574 if (pid
== PIDGET (inferior_ptid
))
1575 error (_("Cannot detach breakpoints of inferior_ptid"));
1577 /* Set inferior_ptid; remove_breakpoint uses this global. */
1578 inferior_ptid
= pid_to_ptid (pid
);
1579 ALL_BP_LOCATIONS (b
)
1583 val
= remove_breakpoint (b
, mark_inserted
);
1586 do_cleanups (old_chain
);
1591 do_cleanups (old_chain
);
1596 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1600 if (b
->owner
->enable_state
== bp_permanent
)
1601 /* Permanent breakpoints cannot be inserted or removed. */
1604 /* The type of none suggests that owner is actually deleted.
1605 This should not ever happen. */
1606 gdb_assert (b
->owner
->type
!= bp_none
);
1608 if (b
->loc_type
== bp_loc_software_breakpoint
1609 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1611 /* "Normal" instruction breakpoint: either the standard
1612 trap-instruction bp (bp_breakpoint), or a
1613 bp_hardware_breakpoint. */
1615 /* First check to see if we have to handle an overlay. */
1616 if (overlay_debugging
== ovly_off
1617 || b
->section
== NULL
1618 || !(section_is_overlay (b
->section
)))
1620 /* No overlay handling: just remove the breakpoint. */
1622 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1623 val
= target_remove_hw_breakpoint (&b
->target_info
);
1625 val
= target_remove_breakpoint (&b
->target_info
);
1629 /* This breakpoint is in an overlay section.
1630 Did we set a breakpoint at the LMA? */
1631 if (!overlay_events_enabled
)
1633 /* Yes -- overlay event support is not active, so we
1634 should have set a breakpoint at the LMA. Remove it.
1636 /* Ignore any failures: if the LMA is in ROM, we will
1637 have already warned when we failed to insert it. */
1638 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1639 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1641 target_remove_breakpoint (&b
->overlay_target_info
);
1643 /* Did we set a breakpoint at the VMA?
1644 If so, we will have marked the breakpoint 'inserted'. */
1647 /* Yes -- remove it. Previously we did not bother to
1648 remove the breakpoint if the section had been
1649 unmapped, but let's not rely on that being safe. We
1650 don't know what the overlay manager might do. */
1651 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1652 val
= target_remove_hw_breakpoint (&b
->target_info
);
1654 /* However, we should remove *software* breakpoints only
1655 if the section is still mapped, or else we overwrite
1656 wrong code with the saved shadow contents. */
1657 else if (section_is_mapped (b
->section
))
1658 val
= target_remove_breakpoint (&b
->target_info
);
1664 /* No -- not inserted, so no need to remove. No error. */
1669 /* In some cases, we might not be able to remove a breakpoint
1670 in a shared library that has already been removed, but we
1671 have not yet processed the shlib unload event. */
1672 if (val
&& solib_address (b
->address
))
1677 b
->inserted
= (is
== mark_inserted
);
1679 else if (b
->loc_type
== bp_loc_hardware_watchpoint
)
1684 b
->inserted
= (is
== mark_inserted
);
1685 val
= target_remove_watchpoint (b
->address
, b
->length
,
1686 b
->watchpoint_type
);
1688 /* Failure to remove any of the hardware watchpoints comes here. */
1689 if ((is
== mark_uninserted
) && (b
->inserted
))
1690 warning (_("Could not remove hardware watchpoint %d."),
1693 else if ((b
->owner
->type
== bp_catch_fork
||
1694 b
->owner
->type
== bp_catch_vfork
||
1695 b
->owner
->type
== bp_catch_exec
)
1696 && breakpoint_enabled (b
->owner
)
1700 switch (b
->owner
->type
)
1703 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1705 case bp_catch_vfork
:
1706 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1709 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1712 warning (_("Internal error, %s line %d."), __FILE__
, __LINE__
);
1717 b
->inserted
= (is
== mark_inserted
);
1723 /* Clear the "inserted" flag in all breakpoints. */
1726 mark_breakpoints_out (void)
1728 struct bp_location
*bpt
;
1730 ALL_BP_LOCATIONS (bpt
)
1734 /* Clear the "inserted" flag in all breakpoints and delete any
1735 breakpoints which should go away between runs of the program.
1737 Plus other such housekeeping that has to be done for breakpoints
1740 Note: this function gets called at the end of a run (by
1741 generic_mourn_inferior) and when a run begins (by
1742 init_wait_for_inferior). */
1747 breakpoint_init_inferior (enum inf_context context
)
1749 struct breakpoint
*b
, *temp
;
1750 struct bp_location
*bpt
;
1752 ALL_BP_LOCATIONS (bpt
)
1753 if (bpt
->owner
->enable_state
!= bp_permanent
)
1756 ALL_BREAKPOINTS_SAFE (b
, temp
)
1761 case bp_watchpoint_scope
:
1763 /* If the call dummy breakpoint is at the entry point it will
1764 cause problems when the inferior is rerun, so we better
1767 Also get rid of scope breakpoints. */
1768 delete_breakpoint (b
);
1772 case bp_hardware_watchpoint
:
1773 case bp_read_watchpoint
:
1774 case bp_access_watchpoint
:
1776 /* Likewise for watchpoints on local expressions. */
1777 if (b
->exp_valid_block
!= NULL
)
1778 delete_breakpoint (b
);
1779 else if (context
== inf_starting
)
1781 /* Reset val field to force reread of starting value
1782 in insert_breakpoints. */
1784 value_free (b
->val
);
1795 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1796 exists at PC. It returns ordinary_breakpoint_here if it's an
1797 ordinary breakpoint, or permanent_breakpoint_here if it's a
1798 permanent breakpoint.
1799 - When continuing from a location with an ordinary breakpoint, we
1800 actually single step once before calling insert_breakpoints.
1801 - When continuing from a localion with a permanent breakpoint, we
1802 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1803 the target, to advance the PC past the breakpoint. */
1805 enum breakpoint_here
1806 breakpoint_here_p (CORE_ADDR pc
)
1808 const struct bp_location
*bpt
;
1809 int any_breakpoint_here
= 0;
1811 ALL_BP_LOCATIONS (bpt
)
1813 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1814 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1817 if ((breakpoint_enabled (bpt
->owner
)
1818 || bpt
->owner
->enable_state
== bp_permanent
)
1819 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1821 if (overlay_debugging
1822 && section_is_overlay (bpt
->section
)
1823 && !section_is_mapped (bpt
->section
))
1824 continue; /* unmapped overlay -- can't be a match */
1825 else if (bpt
->owner
->enable_state
== bp_permanent
)
1826 return permanent_breakpoint_here
;
1828 any_breakpoint_here
= 1;
1832 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1836 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1837 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1838 This does not check for single-step breakpoints, which are
1839 inserted and removed using direct target manipulation. */
1842 regular_breakpoint_inserted_here_p (CORE_ADDR pc
)
1844 const struct bp_location
*bpt
;
1846 ALL_BP_LOCATIONS (bpt
)
1848 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1849 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1853 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1855 if (overlay_debugging
1856 && section_is_overlay (bpt
->section
)
1857 && !section_is_mapped (bpt
->section
))
1858 continue; /* unmapped overlay -- can't be a match */
1866 /* Returns non-zero iff there's either regular breakpoint
1867 or a single step breakpoint inserted at PC. */
1870 breakpoint_inserted_here_p (CORE_ADDR pc
)
1872 if (regular_breakpoint_inserted_here_p (pc
))
1875 if (single_step_breakpoint_inserted_here_p (pc
))
1881 /* This function returns non-zero iff there is a software breakpoint
1885 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1887 const struct bp_location
*bpt
;
1888 int any_breakpoint_here
= 0;
1890 ALL_BP_LOCATIONS (bpt
)
1892 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1896 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1898 if (overlay_debugging
1899 && section_is_overlay (bpt
->section
)
1900 && !section_is_mapped (bpt
->section
))
1901 continue; /* unmapped overlay -- can't be a match */
1907 /* Also check for software single-step breakpoints. */
1908 if (single_step_breakpoint_inserted_here_p (pc
))
1914 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1915 PC is valid for process/thread PTID. */
1918 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1920 const struct bp_location
*bpt
;
1923 thread
= pid_to_thread_id (ptid
);
1925 ALL_BP_LOCATIONS (bpt
)
1927 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1928 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1931 if ((breakpoint_enabled (bpt
->owner
)
1932 || bpt
->owner
->enable_state
== bp_permanent
)
1933 && bpt
->address
== pc
1934 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1936 if (overlay_debugging
1937 && section_is_overlay (bpt
->section
)
1938 && !section_is_mapped (bpt
->section
))
1939 continue; /* unmapped overlay -- can't be a match */
1949 /* bpstat stuff. External routines' interfaces are documented
1953 ep_is_catchpoint (struct breakpoint
*ep
)
1956 (ep
->type
== bp_catch_load
)
1957 || (ep
->type
== bp_catch_unload
)
1958 || (ep
->type
== bp_catch_fork
)
1959 || (ep
->type
== bp_catch_vfork
)
1960 || (ep
->type
== bp_catch_exec
);
1962 /* ??rehrauer: Add more kinds here, as are implemented... */
1966 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1969 (ep
->type
== bp_catch_load
)
1970 || (ep
->type
== bp_catch_unload
);
1974 bpstat_free (bpstat bs
)
1976 if (bs
->old_val
!= NULL
)
1977 value_free (bs
->old_val
);
1978 free_command_lines (&bs
->commands
);
1982 /* Clear a bpstat so that it says we are not at any breakpoint.
1983 Also free any storage that is part of a bpstat. */
1986 bpstat_clear (bpstat
*bsp
)
2003 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
2004 is part of the bpstat is copied as well. */
2007 bpstat_copy (bpstat bs
)
2011 bpstat retval
= NULL
;
2016 for (; bs
!= NULL
; bs
= bs
->next
)
2018 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
2019 memcpy (tmp
, bs
, sizeof (*tmp
));
2020 if (bs
->commands
!= NULL
)
2021 tmp
->commands
= copy_command_lines (bs
->commands
);
2022 if (bs
->old_val
!= NULL
)
2024 tmp
->old_val
= value_copy (bs
->old_val
);
2025 release_value (tmp
->old_val
);
2029 /* This is the first thing in the chain. */
2039 /* Find the bpstat associated with this breakpoint */
2042 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
2047 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2049 if (bsp
->breakpoint_at
&& bsp
->breakpoint_at
->owner
== breakpoint
)
2055 /* Find a step_resume breakpoint associated with this bpstat.
2056 (If there are multiple step_resume bp's on the list, this function
2057 will arbitrarily pick one.)
2059 It is an error to use this function if BPSTAT doesn't contain a
2060 step_resume breakpoint.
2062 See wait_for_inferior's use of this function. */
2064 bpstat_find_step_resume_breakpoint (bpstat bsp
)
2068 gdb_assert (bsp
!= NULL
);
2070 current_thread
= pid_to_thread_id (inferior_ptid
);
2072 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2074 if ((bsp
->breakpoint_at
!= NULL
) &&
2075 (bsp
->breakpoint_at
->owner
->type
== bp_step_resume
) &&
2076 (bsp
->breakpoint_at
->owner
->thread
== current_thread
||
2077 bsp
->breakpoint_at
->owner
->thread
== -1))
2078 return bsp
->breakpoint_at
->owner
;
2081 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2085 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2086 at. *BSP upon return is a bpstat which points to the remaining
2087 breakpoints stopped at (but which is not guaranteed to be good for
2088 anything but further calls to bpstat_num).
2089 Return 0 if passed a bpstat which does not indicate any breakpoints.
2090 Return -1 if stopped at a breakpoint that has been deleted since
2092 Return 1 otherwise. */
2095 bpstat_num (bpstat
*bsp
, int *num
)
2097 struct breakpoint
*b
;
2100 return 0; /* No more breakpoint values */
2102 /* We assume we'll never have several bpstats that
2103 correspond to a single breakpoint -- otherwise,
2104 this function might return the same number more
2105 than once and this will look ugly. */
2106 b
= (*bsp
)->breakpoint_at
? (*bsp
)->breakpoint_at
->owner
: NULL
;
2107 *bsp
= (*bsp
)->next
;
2109 return -1; /* breakpoint that's been deleted since */
2111 *num
= b
->number
; /* We have its number */
2115 /* Modify BS so that the actions will not be performed. */
2118 bpstat_clear_actions (bpstat bs
)
2120 for (; bs
!= NULL
; bs
= bs
->next
)
2122 free_command_lines (&bs
->commands
);
2123 if (bs
->old_val
!= NULL
)
2125 value_free (bs
->old_val
);
2131 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2133 cleanup_executing_breakpoints (void *ignore
)
2135 executing_breakpoint_commands
= 0;
2138 /* Execute all the commands associated with all the breakpoints at this
2139 location. Any of these commands could cause the process to proceed
2140 beyond this point, etc. We look out for such changes by checking
2141 the global "breakpoint_proceeded" after each command.
2143 Returns true if a breakpoint command resumed the inferior. In that
2144 case, it is the caller's responsibility to recall it again with the
2145 bpstat of the current thread. */
2148 bpstat_do_actions_1 (bpstat
*bsp
)
2151 struct cleanup
*old_chain
;
2154 /* Avoid endless recursion if a `source' command is contained
2156 if (executing_breakpoint_commands
)
2159 executing_breakpoint_commands
= 1;
2160 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2162 /* This pointer will iterate over the list of bpstat's. */
2165 breakpoint_proceeded
= 0;
2166 for (; bs
!= NULL
; bs
= bs
->next
)
2168 struct command_line
*cmd
;
2169 struct cleanup
*this_cmd_tree_chain
;
2171 /* Take ownership of the BSP's command tree, if it has one.
2173 The command tree could legitimately contain commands like
2174 'step' and 'next', which call clear_proceed_status, which
2175 frees stop_bpstat's command tree. To make sure this doesn't
2176 free the tree we're executing out from under us, we need to
2177 take ownership of the tree ourselves. Since a given bpstat's
2178 commands are only executed once, we don't need to copy it; we
2179 can clear the pointer in the bpstat, and make sure we free
2180 the tree when we're done. */
2183 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2187 execute_control_command (cmd
);
2189 if (breakpoint_proceeded
)
2195 /* We can free this command tree now. */
2196 do_cleanups (this_cmd_tree_chain
);
2198 if (breakpoint_proceeded
)
2200 if (target_can_async_p ())
2201 /* If we are in async mode, then the target might be still
2202 running, not stopped at any breakpoint, so nothing for
2203 us to do here -- just return to the event loop. */
2206 /* In sync mode, when execute_control_command returns
2207 we're already standing on the next breakpoint.
2208 Breakpoint commands for that stop were not run, since
2209 execute_command does not run breakpoint commands --
2210 only command_line_handler does, but that one is not
2211 involved in execution of breakpoint commands. So, we
2212 can now execute breakpoint commands. It should be
2213 noted that making execute_command do bpstat actions is
2214 not an option -- in this case we'll have recursive
2215 invocation of bpstat for each breakpoint with a
2216 command, and can easily blow up GDB stack. Instead, we
2217 return true, which will trigger the caller to recall us
2218 with the new stop_bpstat. */
2223 do_cleanups (old_chain
);
2228 bpstat_do_actions (void)
2230 /* Do any commands attached to breakpoint we are stopped at. */
2231 while (!ptid_equal (inferior_ptid
, null_ptid
)
2232 && target_has_execution
2233 && !is_exited (inferior_ptid
)
2234 && !is_executing (inferior_ptid
))
2235 /* Since in sync mode, bpstat_do_actions may resume the inferior,
2236 and only return when it is stopped at the next breakpoint, we
2237 keep doing breakpoint actions until it returns false to
2238 indicate the inferior was not resumed. */
2239 if (!bpstat_do_actions_1 (&inferior_thread ()->stop_bpstat
))
2243 /* Print out the (old or new) value associated with a watchpoint. */
2246 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2249 fprintf_unfiltered (stream
, _("<unreadable>"));
2251 value_print (val
, stream
, 0, Val_pretty_default
);
2254 /* This is the normal print function for a bpstat. In the future,
2255 much of this logic could (should?) be moved to bpstat_stop_status,
2256 by having it set different print_it values.
2258 Current scheme: When we stop, bpstat_print() is called. It loops
2259 through the bpstat list of things causing this stop, calling the
2260 print_bp_stop_message function on each one. The behavior of the
2261 print_bp_stop_message function depends on the print_it field of
2262 bpstat. If such field so indicates, call this function here.
2264 Return values from this routine (ultimately used by bpstat_print()
2265 and normal_stop() to decide what to do):
2266 PRINT_NOTHING: Means we already printed all we needed to print,
2267 don't print anything else.
2268 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2269 that something to be followed by a location.
2270 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2271 that something to be followed by a location.
2272 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2275 static enum print_stop_action
2276 print_it_typical (bpstat bs
)
2278 struct cleanup
*old_chain
, *ui_out_chain
;
2279 struct breakpoint
*b
;
2280 const struct bp_location
*bl
;
2281 struct ui_stream
*stb
;
2283 stb
= ui_out_stream_new (uiout
);
2284 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2285 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2286 which has since been deleted. */
2287 if (bs
->breakpoint_at
== NULL
)
2288 return PRINT_UNKNOWN
;
2289 bl
= bs
->breakpoint_at
;
2295 case bp_hardware_breakpoint
:
2296 bp_temp
= bs
->breakpoint_at
->owner
->disposition
== disp_del
;
2297 if (bl
->address
!= bl
->requested_address
)
2298 breakpoint_adjustment_warning (bl
->requested_address
,
2301 annotate_breakpoint (b
->number
);
2303 ui_out_text (uiout
, "\nTemporary breakpoint ");
2305 ui_out_text (uiout
, "\nBreakpoint ");
2306 if (ui_out_is_mi_like_p (uiout
))
2308 ui_out_field_string (uiout
, "reason",
2309 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2310 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
2312 ui_out_field_int (uiout
, "bkptno", b
->number
);
2313 ui_out_text (uiout
, ", ");
2314 return PRINT_SRC_AND_LOC
;
2317 case bp_shlib_event
:
2318 /* Did we stop because the user set the stop_on_solib_events
2319 variable? (If so, we report this as a generic, "Stopped due
2320 to shlib event" message.) */
2321 printf_filtered (_("Stopped due to shared library event\n"));
2322 return PRINT_NOTHING
;
2325 case bp_thread_event
:
2326 /* Not sure how we will get here.
2327 GDB should not stop for these breakpoints. */
2328 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2329 return PRINT_NOTHING
;
2332 case bp_overlay_event
:
2333 /* By analogy with the thread event, GDB should not stop for these. */
2334 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2335 return PRINT_NOTHING
;
2339 annotate_catchpoint (b
->number
);
2340 printf_filtered (_("\nCatchpoint %d (loaded %s), "),
2342 b
->triggered_dll_pathname
);
2343 return PRINT_SRC_AND_LOC
;
2346 case bp_catch_unload
:
2347 annotate_catchpoint (b
->number
);
2348 printf_filtered (_("\nCatchpoint %d (unloaded %s), "),
2350 b
->triggered_dll_pathname
);
2351 return PRINT_SRC_AND_LOC
;
2355 annotate_catchpoint (b
->number
);
2356 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
2358 ptid_get_pid (b
->forked_inferior_pid
));
2359 return PRINT_SRC_AND_LOC
;
2362 case bp_catch_vfork
:
2363 annotate_catchpoint (b
->number
);
2364 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
2366 ptid_get_pid (b
->forked_inferior_pid
));
2367 return PRINT_SRC_AND_LOC
;
2371 annotate_catchpoint (b
->number
);
2372 printf_filtered (_("\nCatchpoint %d (exec'd %s), "),
2375 return PRINT_SRC_AND_LOC
;
2379 case bp_hardware_watchpoint
:
2380 annotate_watchpoint (b
->number
);
2381 if (ui_out_is_mi_like_p (uiout
))
2384 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2386 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2387 ui_out_text (uiout
, "\nOld value = ");
2388 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2389 ui_out_field_stream (uiout
, "old", stb
);
2390 ui_out_text (uiout
, "\nNew value = ");
2391 watchpoint_value_print (b
->val
, stb
->stream
);
2392 ui_out_field_stream (uiout
, "new", stb
);
2393 do_cleanups (ui_out_chain
);
2394 ui_out_text (uiout
, "\n");
2395 /* More than one watchpoint may have been triggered. */
2396 return PRINT_UNKNOWN
;
2399 case bp_read_watchpoint
:
2400 if (ui_out_is_mi_like_p (uiout
))
2403 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2405 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2406 ui_out_text (uiout
, "\nValue = ");
2407 watchpoint_value_print (b
->val
, stb
->stream
);
2408 ui_out_field_stream (uiout
, "value", stb
);
2409 do_cleanups (ui_out_chain
);
2410 ui_out_text (uiout
, "\n");
2411 return PRINT_UNKNOWN
;
2414 case bp_access_watchpoint
:
2415 if (bs
->old_val
!= NULL
)
2417 annotate_watchpoint (b
->number
);
2418 if (ui_out_is_mi_like_p (uiout
))
2421 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2423 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2424 ui_out_text (uiout
, "\nOld value = ");
2425 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2426 ui_out_field_stream (uiout
, "old", stb
);
2427 ui_out_text (uiout
, "\nNew value = ");
2432 if (ui_out_is_mi_like_p (uiout
))
2435 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2436 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2437 ui_out_text (uiout
, "\nValue = ");
2439 watchpoint_value_print (b
->val
, stb
->stream
);
2440 ui_out_field_stream (uiout
, "new", stb
);
2441 do_cleanups (ui_out_chain
);
2442 ui_out_text (uiout
, "\n");
2443 return PRINT_UNKNOWN
;
2446 /* Fall through, we don't deal with these types of breakpoints
2450 if (ui_out_is_mi_like_p (uiout
))
2453 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2454 return PRINT_UNKNOWN
;
2458 if (ui_out_is_mi_like_p (uiout
))
2461 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2462 return PRINT_UNKNOWN
;
2467 case bp_longjmp_resume
:
2468 case bp_step_resume
:
2469 case bp_watchpoint_scope
:
2472 return PRINT_UNKNOWN
;
2476 /* Generic routine for printing messages indicating why we
2477 stopped. The behavior of this function depends on the value
2478 'print_it' in the bpstat structure. Under some circumstances we
2479 may decide not to print anything here and delegate the task to
2482 static enum print_stop_action
2483 print_bp_stop_message (bpstat bs
)
2485 switch (bs
->print_it
)
2488 /* Nothing should be printed for this bpstat entry. */
2489 return PRINT_UNKNOWN
;
2493 /* We still want to print the frame, but we already printed the
2494 relevant messages. */
2495 return PRINT_SRC_AND_LOC
;
2498 case print_it_normal
:
2500 const struct bp_location
*bl
= bs
->breakpoint_at
;
2501 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2503 /* Normal case. Call the breakpoint's print_it method, or
2504 print_it_typical. */
2505 /* FIXME: how breakpoint can ever be NULL here? */
2506 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2507 return b
->ops
->print_it (b
);
2509 return print_it_typical (bs
);
2514 internal_error (__FILE__
, __LINE__
,
2515 _("print_bp_stop_message: unrecognized enum value"));
2520 /* Print a message indicating what happened. This is called from
2521 normal_stop(). The input to this routine is the head of the bpstat
2522 list - a list of the eventpoints that caused this stop. This
2523 routine calls the generic print routine for printing a message
2524 about reasons for stopping. This will print (for example) the
2525 "Breakpoint n," part of the output. The return value of this
2528 PRINT_UNKNOWN: Means we printed nothing
2529 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2530 code to print the location. An example is
2531 "Breakpoint 1, " which should be followed by
2533 PRINT_SRC_ONLY: Means we printed something, but there is no need
2534 to also print the location part of the message.
2535 An example is the catch/throw messages, which
2536 don't require a location appended to the end.
2537 PRINT_NOTHING: We have done some printing and we don't need any
2538 further info to be printed.*/
2540 enum print_stop_action
2541 bpstat_print (bpstat bs
)
2545 /* Maybe another breakpoint in the chain caused us to stop.
2546 (Currently all watchpoints go on the bpstat whether hit or not.
2547 That probably could (should) be changed, provided care is taken
2548 with respect to bpstat_explains_signal). */
2549 for (; bs
; bs
= bs
->next
)
2551 val
= print_bp_stop_message (bs
);
2552 if (val
== PRINT_SRC_ONLY
2553 || val
== PRINT_SRC_AND_LOC
2554 || val
== PRINT_NOTHING
)
2558 /* We reached the end of the chain, or we got a null BS to start
2559 with and nothing was printed. */
2560 return PRINT_UNKNOWN
;
2563 /* Evaluate the expression EXP and return 1 if value is zero.
2564 This is used inside a catch_errors to evaluate the breakpoint condition.
2565 The argument is a "struct expression *" that has been cast to char * to
2566 make it pass through catch_errors. */
2569 breakpoint_cond_eval (void *exp
)
2571 struct value
*mark
= value_mark ();
2572 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2573 value_free_to_mark (mark
);
2577 /* Allocate a new bpstat and chain it to the current one. */
2580 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2584 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2586 bs
->breakpoint_at
= bl
;
2587 /* If the condition is false, etc., don't do the commands. */
2588 bs
->commands
= NULL
;
2590 bs
->print_it
= print_it_normal
;
2594 /* The target has stopped with waitstatus WS. Check if any hardware
2595 watchpoints have triggered, according to the target. */
2598 watchpoints_triggered (struct target_waitstatus
*ws
)
2600 int stopped_by_watchpoint
= STOPPED_BY_WATCHPOINT (*ws
);
2602 struct breakpoint
*b
;
2604 if (!stopped_by_watchpoint
)
2606 /* We were not stopped by a watchpoint. Mark all watchpoints
2607 as not triggered. */
2609 if (b
->type
== bp_hardware_watchpoint
2610 || b
->type
== bp_read_watchpoint
2611 || b
->type
== bp_access_watchpoint
)
2612 b
->watchpoint_triggered
= watch_triggered_no
;
2617 if (!target_stopped_data_address (¤t_target
, &addr
))
2619 /* We were stopped by a watchpoint, but we don't know where.
2620 Mark all watchpoints as unknown. */
2622 if (b
->type
== bp_hardware_watchpoint
2623 || b
->type
== bp_read_watchpoint
2624 || b
->type
== bp_access_watchpoint
)
2625 b
->watchpoint_triggered
= watch_triggered_unknown
;
2627 return stopped_by_watchpoint
;
2630 /* The target could report the data address. Mark watchpoints
2631 affected by this data address as triggered, and all others as not
2635 if (b
->type
== bp_hardware_watchpoint
2636 || b
->type
== bp_read_watchpoint
2637 || b
->type
== bp_access_watchpoint
)
2639 struct bp_location
*loc
;
2642 b
->watchpoint_triggered
= watch_triggered_no
;
2643 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2644 /* Exact match not required. Within range is
2646 if (target_watchpoint_addr_within_range (¤t_target
,
2650 b
->watchpoint_triggered
= watch_triggered_yes
;
2658 /* Possible return values for watchpoint_check (this can't be an enum
2659 because of check_errors). */
2660 /* The watchpoint has been deleted. */
2661 #define WP_DELETED 1
2662 /* The value has changed. */
2663 #define WP_VALUE_CHANGED 2
2664 /* The value has not changed. */
2665 #define WP_VALUE_NOT_CHANGED 3
2667 #define BP_TEMPFLAG 1
2668 #define BP_HARDWAREFLAG 2
2670 /* Check watchpoint condition. */
2673 watchpoint_check (void *p
)
2675 bpstat bs
= (bpstat
) p
;
2676 struct breakpoint
*b
;
2677 struct frame_info
*fr
;
2678 int within_current_scope
;
2680 b
= bs
->breakpoint_at
->owner
;
2682 if (b
->exp_valid_block
== NULL
)
2683 within_current_scope
= 1;
2686 /* There is no current frame at this moment. If we're going to have
2687 any chance of handling watchpoints on local variables, we'll need
2688 the frame chain (so we can determine if we're in scope). */
2689 reinit_frame_cache ();
2690 fr
= frame_find_by_id (b
->watchpoint_frame
);
2691 within_current_scope
= (fr
!= NULL
);
2693 /* If we've gotten confused in the unwinder, we might have
2694 returned a frame that can't describe this variable. */
2695 if (within_current_scope
2696 && (block_linkage_function (b
->exp_valid_block
)
2697 != get_frame_function (fr
)))
2698 within_current_scope
= 0;
2700 /* in_function_epilogue_p() returns a non-zero value if we're still
2701 in the function but the stack frame has already been invalidated.
2702 Since we can't rely on the values of local variables after the
2703 stack has been destroyed, we are treating the watchpoint in that
2704 state as `not changed' without further checking.
2706 vinschen/2003-09-04: The former implementation left out the case
2707 that the watchpoint frame couldn't be found by frame_find_by_id()
2708 because the current PC is currently in an epilogue. Calling
2709 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2710 if ((!within_current_scope
|| fr
== get_current_frame ())
2711 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2712 return WP_VALUE_NOT_CHANGED
;
2713 if (fr
&& within_current_scope
)
2714 /* If we end up stopping, the current frame will get selected
2715 in normal_stop. So this call to select_frame won't affect
2720 if (within_current_scope
)
2722 /* We use value_{,free_to_}mark because it could be a
2723 *long* time before we return to the command level and
2724 call free_all_values. We can't call free_all_values because
2725 we might be in the middle of evaluating a function call. */
2727 struct value
*mark
= value_mark ();
2728 struct value
*new_val
;
2730 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2731 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2732 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2734 if (new_val
!= NULL
)
2736 release_value (new_val
);
2737 value_free_to_mark (mark
);
2739 bs
->old_val
= b
->val
;
2742 /* We will stop here */
2743 return WP_VALUE_CHANGED
;
2747 /* Nothing changed, don't do anything. */
2748 value_free_to_mark (mark
);
2749 /* We won't stop here */
2750 return WP_VALUE_NOT_CHANGED
;
2755 /* This seems like the only logical thing to do because
2756 if we temporarily ignored the watchpoint, then when
2757 we reenter the block in which it is valid it contains
2758 garbage (in the case of a function, it may have two
2759 garbage values, one before and one after the prologue).
2760 So we can't even detect the first assignment to it and
2761 watch after that (since the garbage may or may not equal
2762 the first value assigned). */
2763 /* We print all the stop information in print_it_typical(), but
2764 in this case, by the time we call print_it_typical() this bp
2765 will be deleted already. So we have no choice but print the
2766 information here. */
2767 if (ui_out_is_mi_like_p (uiout
))
2769 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2770 ui_out_text (uiout
, "\nWatchpoint ");
2771 ui_out_field_int (uiout
, "wpnum", b
->number
);
2772 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2773 which its expression is valid.\n");
2775 if (b
->related_breakpoint
)
2776 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2777 b
->disposition
= disp_del_at_next_stop
;
2783 /* Return true if it looks like target has stopped due to hitting
2784 breakpoint location BL. This function does not check if we
2785 should stop, only if BL explains the stop. */
2787 bpstat_check_location (const struct bp_location
*bl
, CORE_ADDR bp_addr
)
2789 struct breakpoint
*b
= bl
->owner
;
2791 if (b
->type
!= bp_watchpoint
2792 && b
->type
!= bp_hardware_watchpoint
2793 && b
->type
!= bp_read_watchpoint
2794 && b
->type
!= bp_access_watchpoint
2795 && b
->type
!= bp_hardware_breakpoint
2796 && b
->type
!= bp_catch_fork
2797 && b
->type
!= bp_catch_vfork
2798 && b
->type
!= bp_catch_exec
) /* a non-watchpoint bp */
2800 if (bl
->address
!= bp_addr
) /* address doesn't match */
2802 if (overlay_debugging
/* unmapped overlay section */
2803 && section_is_overlay (bl
->section
)
2804 && !section_is_mapped (bl
->section
))
2808 /* Continuable hardware watchpoints are treated as non-existent if the
2809 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2810 some data address). Otherwise gdb won't stop on a break instruction
2811 in the code (not from a breakpoint) when a hardware watchpoint has
2812 been defined. Also skip watchpoints which we know did not trigger
2813 (did not match the data address). */
2815 if ((b
->type
== bp_hardware_watchpoint
2816 || b
->type
== bp_read_watchpoint
2817 || b
->type
== bp_access_watchpoint
)
2818 && b
->watchpoint_triggered
== watch_triggered_no
)
2821 if (b
->type
== bp_hardware_breakpoint
)
2823 if (bl
->address
!= bp_addr
)
2825 if (overlay_debugging
/* unmapped overlay section */
2826 && section_is_overlay (bl
->section
)
2827 && !section_is_mapped (bl
->section
))
2831 /* Is this a catchpoint of a load or unload? If so, did we
2832 get a load or unload of the specified library? If not,
2834 if ((b
->type
== bp_catch_load
)
2835 #if defined(SOLIB_HAVE_LOAD_EVENT)
2836 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2837 || ((b
->dll_pathname
!= NULL
)
2838 && (strcmp (b
->dll_pathname
,
2839 SOLIB_LOADED_LIBRARY_PATHNAME (
2840 PIDGET (inferior_ptid
)))
2846 if ((b
->type
== bp_catch_unload
)
2847 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2848 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2849 || ((b
->dll_pathname
!= NULL
)
2850 && (strcmp (b
->dll_pathname
,
2851 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2852 PIDGET (inferior_ptid
)))
2858 if ((b
->type
== bp_catch_fork
)
2859 && !inferior_has_forked (inferior_ptid
,
2860 &b
->forked_inferior_pid
))
2863 if ((b
->type
== bp_catch_vfork
)
2864 && !inferior_has_vforked (inferior_ptid
,
2865 &b
->forked_inferior_pid
))
2868 if ((b
->type
== bp_catch_exec
)
2869 && !inferior_has_execd (inferior_ptid
, &b
->exec_pathname
))
2875 /* If BS refers to a watchpoint, determine if the watched values
2876 has actually changed, and we should stop. If not, set BS->stop
2879 bpstat_check_watchpoint (bpstat bs
)
2881 const struct bp_location
*bl
= bs
->breakpoint_at
;
2882 struct breakpoint
*b
= bl
->owner
;
2884 if (b
->type
== bp_watchpoint
2885 || b
->type
== bp_read_watchpoint
2886 || b
->type
== bp_access_watchpoint
2887 || b
->type
== bp_hardware_watchpoint
)
2891 int must_check_value
= 0;
2893 if (b
->type
== bp_watchpoint
)
2894 /* For a software watchpoint, we must always check the
2896 must_check_value
= 1;
2897 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2898 /* We have a hardware watchpoint (read, write, or access)
2899 and the target earlier reported an address watched by
2901 must_check_value
= 1;
2902 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2903 && b
->type
== bp_hardware_watchpoint
)
2904 /* We were stopped by a hardware watchpoint, but the target could
2905 not report the data address. We must check the watchpoint's
2906 value. Access and read watchpoints are out of luck; without
2907 a data address, we can't figure it out. */
2908 must_check_value
= 1;
2910 if (must_check_value
)
2912 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2914 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2915 int e
= catch_errors (watchpoint_check
, bs
, message
,
2917 do_cleanups (cleanups
);
2921 /* We've already printed what needs to be printed. */
2922 bs
->print_it
= print_it_done
;
2925 case WP_VALUE_CHANGED
:
2926 if (b
->type
== bp_read_watchpoint
)
2928 /* Don't stop: read watchpoints shouldn't fire if
2929 the value has changed. This is for targets
2930 which cannot set read-only watchpoints. */
2931 bs
->print_it
= print_it_noop
;
2935 case WP_VALUE_NOT_CHANGED
:
2936 if (b
->type
== bp_hardware_watchpoint
2937 || b
->type
== bp_watchpoint
)
2939 /* Don't stop: write watchpoints shouldn't fire if
2940 the value hasn't changed. */
2941 bs
->print_it
= print_it_noop
;
2949 /* Error from catch_errors. */
2950 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2951 if (b
->related_breakpoint
)
2952 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2953 b
->disposition
= disp_del_at_next_stop
;
2954 /* We've already printed what needs to be printed. */
2955 bs
->print_it
= print_it_done
;
2959 else /* must_check_value == 0 */
2961 /* This is a case where some watchpoint(s) triggered, but
2962 not at the address of this watchpoint, or else no
2963 watchpoint triggered after all. So don't print
2964 anything for this watchpoint. */
2965 bs
->print_it
= print_it_noop
;
2972 /* Check conditions (condition proper, frame, thread and ignore count)
2973 of breakpoint referred to by BS. If we should not stop for this
2974 breakpoint, set BS->stop to 0. */
2976 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
2978 int thread_id
= pid_to_thread_id (ptid
);
2979 const struct bp_location
*bl
= bs
->breakpoint_at
;
2980 struct breakpoint
*b
= bl
->owner
;
2982 if (frame_id_p (b
->frame_id
)
2983 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2987 int value_is_zero
= 0;
2989 /* If this is a scope breakpoint, mark the associated
2990 watchpoint as triggered so that we will handle the
2991 out-of-scope event. We'll get to the watchpoint next
2993 if (b
->type
== bp_watchpoint_scope
)
2994 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
2996 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
2998 /* Need to select the frame, with all that implies
2999 so that the conditions will have the right context. */
3000 select_frame (get_current_frame ());
3002 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
3003 "Error in testing breakpoint condition:\n",
3005 /* FIXME-someday, should give breakpoint # */
3008 if (bl
->cond
&& value_is_zero
)
3012 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
3016 else if (b
->ignore_count
> 0)
3019 annotate_ignore_count_change ();
3021 /* Increase the hit count even though we don't
3029 /* Get a bpstat associated with having just stopped at address
3030 BP_ADDR in thread PTID.
3032 Determine whether we stopped at a breakpoint, etc, or whether we
3033 don't understand this stop. Result is a chain of bpstat's such that:
3035 if we don't understand the stop, the result is a null pointer.
3037 if we understand why we stopped, the result is not null.
3039 Each element of the chain refers to a particular breakpoint or
3040 watchpoint at which we have stopped. (We may have stopped for
3041 several reasons concurrently.)
3043 Each element of the chain has valid next, breakpoint_at,
3044 commands, FIXME??? fields. */
3047 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
3049 struct breakpoint
*b
= NULL
;
3050 const struct bp_location
*bl
;
3051 struct bp_location
*loc
;
3052 /* Root of the chain of bpstat's */
3053 struct bpstats root_bs
[1];
3054 /* Pointer to the last thing in the chain currently. */
3055 bpstat bs
= root_bs
;
3057 int need_remove_insert
;
3059 ALL_BP_LOCATIONS (bl
)
3063 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
3066 /* For hardware watchpoints, we look only at the first location.
3067 The watchpoint_check function will work on entire expression,
3068 not the individual locations. For read watchopints, the
3069 watchpoints_triggered function have checked all locations
3072 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
3075 if (!bpstat_check_location (bl
, bp_addr
))
3078 /* Come here if it's a watchpoint, or if the break address matches */
3080 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
3082 /* Assume we stop. Should we find watchpoint that is not actually
3083 triggered, or if condition of breakpoint is false, we'll reset
3088 bpstat_check_watchpoint (bs
);
3092 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
3093 /* We do not stop for these. */
3096 bpstat_check_breakpoint_conditions (bs
, ptid
);
3102 /* We will stop here */
3103 if (b
->disposition
== disp_disable
)
3105 if (b
->enable_state
!= bp_permanent
)
3106 b
->enable_state
= bp_disabled
;
3107 update_global_location_list (0);
3111 bs
->commands
= b
->commands
;
3113 (strcmp ("silent", bs
->commands
->line
) == 0
3114 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3116 bs
->commands
= bs
->commands
->next
;
3119 bs
->commands
= copy_command_lines (bs
->commands
);
3122 /* Print nothing for this entry if we dont stop or if we dont print. */
3123 if (bs
->stop
== 0 || bs
->print
== 0)
3124 bs
->print_it
= print_it_noop
;
3127 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
3129 if (loc
->address
== bp_addr
)
3131 bs
= bpstat_alloc (loc
, bs
);
3132 /* For hits of moribund locations, we should just proceed. */
3135 bs
->print_it
= print_it_noop
;
3139 bs
->next
= NULL
; /* Terminate the chain */
3140 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3142 /* If we aren't stopping, the value of some hardware watchpoint may
3143 not have changed, but the intermediate memory locations we are
3144 watching may have. Don't bother if we're stopping; this will get
3146 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3150 need_remove_insert
= 0;
3152 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3154 && bs
->breakpoint_at
->owner
3155 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3156 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3157 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3159 /* remove/insert can invalidate bs->breakpoint_at, if this
3160 location is no longer used by the watchpoint. Prevent
3161 further code from trying to use it. */
3162 bs
->breakpoint_at
= NULL
;
3163 need_remove_insert
= 1;
3166 if (need_remove_insert
)
3168 remove_breakpoints ();
3169 insert_breakpoints ();
3172 return root_bs
->next
;
3175 /* Tell what to do about this bpstat. */
3177 bpstat_what (bpstat bs
)
3179 /* Classify each bpstat as one of the following. */
3182 /* This bpstat element has no effect on the main_action. */
3185 /* There was a watchpoint, stop but don't print. */
3188 /* There was a watchpoint, stop and print. */
3191 /* There was a breakpoint but we're not stopping. */
3194 /* There was a breakpoint, stop but don't print. */
3197 /* There was a breakpoint, stop and print. */
3200 /* We hit the longjmp breakpoint. */
3203 /* We hit the longjmp_resume breakpoint. */
3206 /* We hit the step_resume breakpoint. */
3209 /* We hit the shared library event breakpoint. */
3212 /* We caught a shared library event. */
3215 /* This is just used to count how many enums there are. */
3219 /* Here is the table which drives this routine. So that we can
3220 format it pretty, we define some abbreviations for the
3221 enum bpstat_what codes. */
3222 #define kc BPSTAT_WHAT_KEEP_CHECKING
3223 #define ss BPSTAT_WHAT_STOP_SILENT
3224 #define sn BPSTAT_WHAT_STOP_NOISY
3225 #define sgl BPSTAT_WHAT_SINGLE
3226 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3227 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3228 #define sr BPSTAT_WHAT_STEP_RESUME
3229 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3230 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
3232 /* "Can't happen." Might want to print an error message.
3233 abort() is not out of the question, but chances are GDB is just
3234 a bit confused, not unusable. */
3235 #define err BPSTAT_WHAT_STOP_NOISY
3237 /* Given an old action and a class, come up with a new action. */
3238 /* One interesting property of this table is that wp_silent is the same
3239 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3240 after stopping, the check for whether to step over a breakpoint
3241 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3242 reference to how we stopped. We retain separate wp_silent and
3243 bp_silent codes in case we want to change that someday.
3245 Another possibly interesting property of this table is that
3246 there's a partial ordering, priority-like, of the actions. Once
3247 you've decided that some action is appropriate, you'll never go
3248 back and decide something of a lower priority is better. The
3251 kc < clr sgl shl shlr slr sn sr ss
3252 sgl < shl shlr slr sn sr ss
3253 slr < err shl shlr sn sr ss
3254 clr < err shl shlr sn sr ss
3261 What I think this means is that we don't need a damned table
3262 here. If you just put the rows and columns in the right order,
3263 it'd look awfully regular. We could simply walk the bpstat list
3264 and choose the highest priority action we find, with a little
3265 logic to handle the 'err' cases. */
3267 /* step_resume entries: a step resume breakpoint overrides another
3268 breakpoint of signal handling (see comment in wait_for_inferior
3269 at where we set the step_resume breakpoint). */
3271 static const enum bpstat_what_main_action
3272 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3275 /* kc ss sn sgl slr clr sr shl shlr
3278 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
, shlr
},
3280 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
, shlr
},
3282 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3284 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
, shlr
},
3286 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
, shlr
},
3288 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3290 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
, shlr
},
3292 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
, shlr
},
3294 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3296 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
, shlr
},
3298 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, sr
, shlr
, shlr
}
3312 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3313 struct bpstat_what retval
;
3315 retval
.call_dummy
= 0;
3316 for (; bs
!= NULL
; bs
= bs
->next
)
3318 enum class bs_class
= no_effect
;
3319 if (bs
->breakpoint_at
== NULL
)
3320 /* I suspect this can happen if it was a momentary breakpoint
3321 which has since been deleted. */
3323 if (bs
->breakpoint_at
->owner
== NULL
)
3324 bs_class
= bp_nostop
;
3326 switch (bs
->breakpoint_at
->owner
->type
)
3332 case bp_hardware_breakpoint
:
3338 bs_class
= bp_noisy
;
3340 bs_class
= bp_silent
;
3343 bs_class
= bp_nostop
;
3346 case bp_hardware_watchpoint
:
3347 case bp_read_watchpoint
:
3348 case bp_access_watchpoint
:
3352 bs_class
= wp_noisy
;
3354 bs_class
= wp_silent
;
3357 /* There was a watchpoint, but we're not stopping.
3358 This requires no further action. */
3359 bs_class
= no_effect
;
3362 bs_class
= long_jump
;
3364 case bp_longjmp_resume
:
3365 bs_class
= long_resume
;
3367 case bp_step_resume
:
3370 bs_class
= step_resume
;
3373 /* It is for the wrong frame. */
3374 bs_class
= bp_nostop
;
3376 case bp_watchpoint_scope
:
3377 bs_class
= bp_nostop
;
3379 case bp_shlib_event
:
3380 bs_class
= shlib_event
;
3382 case bp_thread_event
:
3383 case bp_overlay_event
:
3384 bs_class
= bp_nostop
;
3387 case bp_catch_unload
:
3388 /* Only if this catchpoint triggered should we cause the
3389 step-out-of-dld behaviour. Otherwise, we ignore this
3392 bs_class
= catch_shlib_event
;
3394 bs_class
= no_effect
;
3397 case bp_catch_vfork
:
3402 bs_class
= bp_noisy
;
3404 bs_class
= bp_silent
;
3407 /* There was a catchpoint, but we're not stopping.
3408 This requires no further action. */
3409 bs_class
= no_effect
;
3412 /* Make sure the action is stop (silent or noisy),
3413 so infrun.c pops the dummy frame. */
3414 bs_class
= bp_silent
;
3415 retval
.call_dummy
= 1;
3418 current_action
= table
[(int) bs_class
][(int) current_action
];
3420 retval
.main_action
= current_action
;
3424 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3425 without hardware support). This isn't related to a specific bpstat,
3426 just to things like whether watchpoints are set. */
3429 bpstat_should_step (void)
3431 struct breakpoint
*b
;
3433 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3440 /* Given a bpstat that records zero or more triggered eventpoints, this
3441 function returns another bpstat which contains only the catchpoints
3442 on that first list, if any. */
3444 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3446 struct bpstats root_bs
[1];
3447 bpstat bs
= root_bs
;
3448 struct breakpoint
*ep
;
3451 bpstat_clear (cp_list
);
3452 root_bs
->next
= NULL
;
3454 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3456 /* Is this eventpoint a catchpoint? If not, ignore it. */
3457 ep
= ep_list
->breakpoint_at
->owner
;
3460 if ((ep
->type
!= bp_catch_load
) &&
3461 (ep
->type
!= bp_catch_unload
))
3462 /* pai: (temp) ADD fork/vfork here!! */
3465 /* Yes; add it to the list. */
3466 bs
= bpstat_alloc (ep_list
->breakpoint_at
, bs
);
3471 #if defined(SOLIB_ADD)
3472 /* Also, for each triggered catchpoint, tag it with the name of
3473 the library that caused this trigger. (We copy the name now,
3474 because it's only guaranteed to be available NOW, when the
3475 catchpoint triggers. Clients who may wish to know the name
3476 later must get it from the catchpoint itself.) */
3477 if (ep
->triggered_dll_pathname
!= NULL
)
3478 xfree (ep
->triggered_dll_pathname
);
3479 if (ep
->type
== bp_catch_load
)
3480 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3481 PIDGET (inferior_ptid
));
3483 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3484 PIDGET (inferior_ptid
));
3486 dll_pathname
= NULL
;
3490 ep
->triggered_dll_pathname
= (char *)
3491 xmalloc (strlen (dll_pathname
) + 1);
3492 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3495 ep
->triggered_dll_pathname
= NULL
;
3501 static void print_breakpoint_location (struct breakpoint
*b
,
3502 struct bp_location
*loc
,
3504 struct ui_stream
*stb
)
3509 = find_pc_sect_function (loc
->address
, loc
->section
);
3512 ui_out_text (uiout
, "in ");
3513 ui_out_field_string (uiout
, "func",
3514 SYMBOL_PRINT_NAME (sym
));
3515 ui_out_wrap_hint (uiout
, wrap_indent
);
3516 ui_out_text (uiout
, " at ");
3518 ui_out_field_string (uiout
, "file", b
->source_file
);
3519 ui_out_text (uiout
, ":");
3521 if (ui_out_is_mi_like_p (uiout
))
3523 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3524 char *fullname
= symtab_to_fullname (sal
.symtab
);
3527 ui_out_field_string (uiout
, "fullname", fullname
);
3530 ui_out_field_int (uiout
, "line", b
->line_number
);
3534 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3538 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3539 ui_out_field_stream (uiout
, "at", stb
);
3543 /* Print B to gdb_stdout. */
3545 print_one_breakpoint_location (struct breakpoint
*b
,
3546 struct bp_location
*loc
,
3548 CORE_ADDR
*last_addr
)
3550 struct command_line
*l
;
3552 struct ep_type_description
3557 static struct ep_type_description bptypes
[] =
3559 {bp_none
, "?deleted?"},
3560 {bp_breakpoint
, "breakpoint"},
3561 {bp_hardware_breakpoint
, "hw breakpoint"},
3562 {bp_until
, "until"},
3563 {bp_finish
, "finish"},
3564 {bp_watchpoint
, "watchpoint"},
3565 {bp_hardware_watchpoint
, "hw watchpoint"},
3566 {bp_read_watchpoint
, "read watchpoint"},
3567 {bp_access_watchpoint
, "acc watchpoint"},
3568 {bp_longjmp
, "longjmp"},
3569 {bp_longjmp_resume
, "longjmp resume"},
3570 {bp_step_resume
, "step resume"},
3571 {bp_watchpoint_scope
, "watchpoint scope"},
3572 {bp_call_dummy
, "call dummy"},
3573 {bp_shlib_event
, "shlib events"},
3574 {bp_thread_event
, "thread events"},
3575 {bp_overlay_event
, "overlay events"},
3576 {bp_catch_load
, "catch load"},
3577 {bp_catch_unload
, "catch unload"},
3578 {bp_catch_fork
, "catch fork"},
3579 {bp_catch_vfork
, "catch vfork"},
3580 {bp_catch_exec
, "catch exec"}
3583 static char bpenables
[] = "nynny";
3584 char wrap_indent
[80];
3585 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3586 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3587 struct cleanup
*bkpt_chain
;
3589 int header_of_multiple
= 0;
3590 int part_of_multiple
= (loc
!= NULL
);
3592 gdb_assert (!loc
|| loc_number
!= 0);
3593 /* See comment in print_one_breakpoint concerning
3594 treatment of breakpoints with single disabled
3598 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3599 header_of_multiple
= 1;
3604 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3608 if (part_of_multiple
)
3611 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3612 ui_out_field_string (uiout
, "number", formatted
);
3617 ui_out_field_int (uiout
, "number", b
->number
);
3622 if (part_of_multiple
)
3623 ui_out_field_skip (uiout
, "type");
3626 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3627 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3628 internal_error (__FILE__
, __LINE__
,
3629 _("bptypes table does not describe type #%d."),
3631 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3636 if (part_of_multiple
)
3637 ui_out_field_skip (uiout
, "disp");
3639 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3644 if (part_of_multiple
)
3645 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3647 ui_out_field_fmt (uiout
, "enabled", "%c",
3648 bpenables
[(int) b
->enable_state
]);
3649 ui_out_spaces (uiout
, 2);
3653 strcpy (wrap_indent
, " ");
3656 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3657 strcat (wrap_indent
, " ");
3659 strcat (wrap_indent
, " ");
3662 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3664 /* Although the print_one can possibly print
3665 all locations, calling it here is not likely
3666 to get any nice result. So, make sure there's
3667 just one location. */
3668 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3669 b
->ops
->print_one (b
, last_addr
);
3675 internal_error (__FILE__
, __LINE__
,
3676 _("print_one_breakpoint: bp_none encountered\n"));
3680 case bp_hardware_watchpoint
:
3681 case bp_read_watchpoint
:
3682 case bp_access_watchpoint
:
3683 /* Field 4, the address, is omitted (which makes the columns
3684 not line up too nicely with the headers, but the effect
3685 is relatively readable). */
3687 ui_out_field_skip (uiout
, "addr");
3689 print_expression (b
->exp
, stb
->stream
);
3690 ui_out_field_stream (uiout
, "what", stb
);
3694 case bp_catch_unload
:
3695 /* Field 4, the address, is omitted (which makes the columns
3696 not line up too nicely with the headers, but the effect
3697 is relatively readable). */
3699 ui_out_field_skip (uiout
, "addr");
3701 if (b
->dll_pathname
== NULL
)
3703 ui_out_field_string (uiout
, "what", "<any library>");
3704 ui_out_spaces (uiout
, 1);
3708 ui_out_text (uiout
, "library \"");
3709 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3710 ui_out_text (uiout
, "\" ");
3715 case bp_catch_vfork
:
3716 /* Field 4, the address, is omitted (which makes the columns
3717 not line up too nicely with the headers, but the effect
3718 is relatively readable). */
3720 ui_out_field_skip (uiout
, "addr");
3722 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
3724 ui_out_text (uiout
, "process ");
3725 ui_out_field_int (uiout
, "what",
3726 ptid_get_pid (b
->forked_inferior_pid
));
3727 ui_out_spaces (uiout
, 1);
3732 /* Field 4, the address, is omitted (which makes the columns
3733 not line up too nicely with the headers, but the effect
3734 is relatively readable). */
3736 ui_out_field_skip (uiout
, "addr");
3738 if (b
->exec_pathname
!= NULL
)
3740 ui_out_text (uiout
, "program \"");
3741 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3742 ui_out_text (uiout
, "\" ");
3747 case bp_hardware_breakpoint
:
3751 case bp_longjmp_resume
:
3752 case bp_step_resume
:
3753 case bp_watchpoint_scope
:
3755 case bp_shlib_event
:
3756 case bp_thread_event
:
3757 case bp_overlay_event
:
3761 if (header_of_multiple
)
3762 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3763 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3764 ui_out_field_string (uiout
, "addr", "<PENDING>");
3766 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3769 if (!header_of_multiple
)
3770 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3772 *last_addr
= b
->loc
->address
;
3776 if (!part_of_multiple
&& b
->thread
!= -1)
3778 /* FIXME: This seems to be redundant and lost here; see the
3779 "stop only in" line a little further down. */
3780 ui_out_text (uiout
, " thread ");
3781 ui_out_field_int (uiout
, "thread", b
->thread
);
3784 ui_out_text (uiout
, "\n");
3786 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3789 ui_out_text (uiout
, "\tstop only in stack frame at ");
3790 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3792 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3793 ui_out_text (uiout
, "\n");
3796 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3798 /* We do not print the condition for Ada exception catchpoints
3799 because the condition is an internal implementation detail
3800 that we do not want to expose to the user. */
3802 ui_out_text (uiout
, "\tstop only if ");
3803 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3804 ui_out_text (uiout
, "\n");
3807 if (!part_of_multiple
&& b
->thread
!= -1)
3809 /* FIXME should make an annotation for this */
3810 ui_out_text (uiout
, "\tstop only in thread ");
3811 ui_out_field_int (uiout
, "thread", b
->thread
);
3812 ui_out_text (uiout
, "\n");
3815 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
)
3817 /* FIXME should make an annotation for this */
3818 if (ep_is_catchpoint (b
))
3819 ui_out_text (uiout
, "\tcatchpoint");
3821 ui_out_text (uiout
, "\tbreakpoint");
3822 ui_out_text (uiout
, " already hit ");
3823 ui_out_field_int (uiout
, "times", b
->hit_count
);
3824 if (b
->hit_count
== 1)
3825 ui_out_text (uiout
, " time\n");
3827 ui_out_text (uiout
, " times\n");
3830 /* Output the count also if it is zero, but only if this is
3831 mi. FIXME: Should have a better test for this. */
3832 if (ui_out_is_mi_like_p (uiout
))
3833 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3834 ui_out_field_int (uiout
, "times", b
->hit_count
);
3836 if (!part_of_multiple
&& b
->ignore_count
)
3839 ui_out_text (uiout
, "\tignore next ");
3840 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3841 ui_out_text (uiout
, " hits\n");
3844 if (!part_of_multiple
&& (l
= b
->commands
))
3846 struct cleanup
*script_chain
;
3849 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3850 print_command_lines (uiout
, l
, 4);
3851 do_cleanups (script_chain
);
3854 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3857 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3858 else if (b
->exp_string
)
3859 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3862 do_cleanups (bkpt_chain
);
3863 do_cleanups (old_chain
);
3867 print_one_breakpoint (struct breakpoint
*b
,
3868 CORE_ADDR
*last_addr
)
3870 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3872 /* If this breakpoint has custom print function,
3873 it's already printed. Otherwise, print individual
3874 locations, if any. */
3875 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3877 /* If breakpoint has a single location that is
3878 disabled, we print it as if it had
3879 several locations, since otherwise it's hard to
3880 represent "breakpoint enabled, location disabled"
3882 Note that while hardware watchpoints have
3883 several locations internally, that's no a property
3886 && !is_hardware_watchpoint (b
)
3887 && (b
->loc
->next
|| !b
->loc
->enabled
)
3888 && !ui_out_is_mi_like_p (uiout
))
3890 struct bp_location
*loc
;
3892 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3893 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3899 struct captured_breakpoint_query_args
3905 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3907 struct captured_breakpoint_query_args
*args
= data
;
3908 struct breakpoint
*b
;
3909 CORE_ADDR dummy_addr
= 0;
3912 if (args
->bnum
== b
->number
)
3914 print_one_breakpoint (b
, &dummy_addr
);
3922 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3924 struct captured_breakpoint_query_args args
;
3926 /* For the moment we don't trust print_one_breakpoint() to not throw
3928 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3929 error_message
, RETURN_MASK_ALL
) < 0)
3935 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3936 catchpoints, et.al.). */
3939 user_settable_breakpoint (const struct breakpoint
*b
)
3941 return (b
->type
== bp_breakpoint
3942 || b
->type
== bp_catch_load
3943 || b
->type
== bp_catch_unload
3944 || b
->type
== bp_catch_fork
3945 || b
->type
== bp_catch_vfork
3946 || b
->type
== bp_catch_exec
3947 || b
->type
== bp_hardware_breakpoint
3948 || b
->type
== bp_watchpoint
3949 || b
->type
== bp_read_watchpoint
3950 || b
->type
== bp_access_watchpoint
3951 || b
->type
== bp_hardware_watchpoint
);
3954 /* Print information on user settable breakpoint (watchpoint, etc)
3955 number BNUM. If BNUM is -1 print all user settable breakpoints.
3956 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3959 breakpoint_1 (int bnum
, int allflag
)
3961 struct breakpoint
*b
;
3962 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3963 int nr_printable_breakpoints
;
3964 struct cleanup
*bkpttbl_chain
;
3966 /* Compute the number of rows in the table. */
3967 nr_printable_breakpoints
= 0;
3970 || bnum
== b
->number
)
3972 if (allflag
|| user_settable_breakpoint (b
))
3973 nr_printable_breakpoints
++;
3978 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3982 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3985 if (nr_printable_breakpoints
> 0)
3986 annotate_breakpoints_headers ();
3987 if (nr_printable_breakpoints
> 0)
3989 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3990 if (nr_printable_breakpoints
> 0)
3992 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3993 if (nr_printable_breakpoints
> 0)
3995 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3996 if (nr_printable_breakpoints
> 0)
3998 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
4001 if (nr_printable_breakpoints
> 0)
4003 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
4004 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
4006 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
4008 if (nr_printable_breakpoints
> 0)
4010 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
4011 ui_out_table_body (uiout
);
4012 if (nr_printable_breakpoints
> 0)
4013 annotate_breakpoints_table ();
4017 || bnum
== b
->number
)
4019 /* We only print out user settable breakpoints unless the
4021 if (allflag
|| user_settable_breakpoint (b
))
4022 print_one_breakpoint (b
, &last_addr
);
4025 do_cleanups (bkpttbl_chain
);
4027 if (nr_printable_breakpoints
== 0)
4030 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
4032 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
4037 /* Compare against (CORE_ADDR)-1 in case some compiler decides
4038 that a comparison of an unsigned with -1 is always false. */
4039 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
4040 set_next_address (current_gdbarch
, last_addr
);
4043 /* FIXME? Should this be moved up so that it is only called when
4044 there have been breakpoints? */
4045 annotate_breakpoints_table_end ();
4049 breakpoints_info (char *bnum_exp
, int from_tty
)
4054 bnum
= parse_and_eval_long (bnum_exp
);
4056 breakpoint_1 (bnum
, 0);
4060 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
4065 bnum
= parse_and_eval_long (bnum_exp
);
4067 breakpoint_1 (bnum
, 1);
4071 breakpoint_has_pc (struct breakpoint
*b
,
4072 CORE_ADDR pc
, struct obj_section
*section
)
4074 struct bp_location
*bl
= b
->loc
;
4075 for (; bl
; bl
= bl
->next
)
4077 if (bl
->address
== pc
4078 && (!overlay_debugging
|| bl
->section
== section
))
4084 /* Print a message describing any breakpoints set at PC. */
4087 describe_other_breakpoints (CORE_ADDR pc
, struct obj_section
*section
,
4091 struct breakpoint
*b
;
4094 others
+= breakpoint_has_pc (b
, pc
, section
);
4098 printf_filtered (_("Note: breakpoint "));
4099 else /* if (others == ???) */
4100 printf_filtered (_("Note: breakpoints "));
4102 if (breakpoint_has_pc (b
, pc
, section
))
4105 printf_filtered ("%d", b
->number
);
4106 if (b
->thread
== -1 && thread
!= -1)
4107 printf_filtered (" (all threads)");
4108 else if (b
->thread
!= -1)
4109 printf_filtered (" (thread %d)", b
->thread
);
4110 printf_filtered ("%s%s ",
4111 ((b
->enable_state
== bp_disabled
||
4112 b
->enable_state
== bp_call_disabled
)
4114 : b
->enable_state
== bp_permanent
4118 : ((others
== 1) ? " and" : ""));
4120 printf_filtered (_("also set at pc "));
4121 fputs_filtered (paddress (pc
), gdb_stdout
);
4122 printf_filtered (".\n");
4126 /* Set the default place to put a breakpoint
4127 for the `break' command with no arguments. */
4130 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
4133 default_breakpoint_valid
= valid
;
4134 default_breakpoint_address
= addr
;
4135 default_breakpoint_symtab
= symtab
;
4136 default_breakpoint_line
= line
;
4139 /* Return true iff it is meaningful to use the address member of
4140 BPT. For some breakpoint types, the address member is irrelevant
4141 and it makes no sense to attempt to compare it to other addresses
4142 (or use it for any other purpose either).
4144 More specifically, each of the following breakpoint types will always
4145 have a zero valued address and we don't want check_duplicates() to mark
4146 breakpoints of any of these types to be a duplicate of an actual
4147 breakpoint at address zero:
4150 bp_hardware_watchpoint
4152 bp_access_watchpoint
4158 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
4160 enum bptype type
= bpt
->type
;
4162 return (type
!= bp_watchpoint
4163 && type
!= bp_hardware_watchpoint
4164 && type
!= bp_read_watchpoint
4165 && type
!= bp_access_watchpoint
4166 && type
!= bp_catch_exec
4167 && type
!= bp_catch_fork
4168 && type
!= bp_catch_vfork
);
4171 /* Rescan breakpoints at the same address and section as BPT,
4172 marking the first one as "first" and any others as "duplicates".
4173 This is so that the bpt instruction is only inserted once.
4174 If we have a permanent breakpoint at the same place as BPT, make
4175 that one the official one, and the rest as duplicates. */
4178 check_duplicates_for (CORE_ADDR address
, struct obj_section
*section
)
4180 struct bp_location
*b
;
4182 struct bp_location
*perm_bp
= 0;
4184 ALL_BP_LOCATIONS (b
)
4185 if (b
->owner
->enable_state
!= bp_disabled
4186 && b
->owner
->enable_state
!= bp_call_disabled
4188 && !b
->shlib_disabled
4189 && b
->address
== address
/* address / overlay match */
4190 && (!overlay_debugging
|| b
->section
== section
)
4191 && breakpoint_address_is_meaningful (b
->owner
))
4193 /* Have we found a permanent breakpoint? */
4194 if (b
->owner
->enable_state
== bp_permanent
)
4201 b
->duplicate
= count
> 1;
4204 /* If we found a permanent breakpoint at this address, go over the
4205 list again and declare all the other breakpoints there to be the
4209 perm_bp
->duplicate
= 0;
4211 /* Permanent breakpoint should always be inserted. */
4212 if (! perm_bp
->inserted
)
4213 internal_error (__FILE__
, __LINE__
,
4214 _("allegedly permanent breakpoint is not "
4215 "actually inserted"));
4217 ALL_BP_LOCATIONS (b
)
4220 if (b
->owner
->enable_state
!= bp_disabled
4221 && b
->owner
->enable_state
!= bp_call_disabled
4222 && b
->enabled
&& !b
->shlib_disabled
4223 && b
->address
== address
/* address / overlay match */
4224 && (!overlay_debugging
|| b
->section
== section
)
4225 && breakpoint_address_is_meaningful (b
->owner
))
4228 internal_error (__FILE__
, __LINE__
,
4229 _("another breakpoint was inserted on top of "
4230 "a permanent breakpoint"));
4239 check_duplicates (struct breakpoint
*bpt
)
4241 struct bp_location
*bl
= bpt
->loc
;
4243 if (! breakpoint_address_is_meaningful (bpt
))
4246 for (; bl
; bl
= bl
->next
)
4247 check_duplicates_for (bl
->address
, bl
->section
);
4251 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4252 int bnum
, int have_bnum
)
4257 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4258 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4260 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4261 bnum
, astr1
, astr2
);
4263 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4266 /* Adjust a breakpoint's address to account for architectural constraints
4267 on breakpoint placement. Return the adjusted address. Note: Very
4268 few targets require this kind of adjustment. For most targets,
4269 this function is simply the identity function. */
4272 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4274 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4276 /* Very few targets need any kind of breakpoint adjustment. */
4279 else if (bptype
== bp_watchpoint
4280 || bptype
== bp_hardware_watchpoint
4281 || bptype
== bp_read_watchpoint
4282 || bptype
== bp_access_watchpoint
4283 || bptype
== bp_catch_fork
4284 || bptype
== bp_catch_vfork
4285 || bptype
== bp_catch_exec
)
4287 /* Watchpoints and the various bp_catch_* eventpoints should not
4288 have their addresses modified. */
4293 CORE_ADDR adjusted_bpaddr
;
4295 /* Some targets have architectural constraints on the placement
4296 of breakpoint instructions. Obtain the adjusted address. */
4297 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4300 /* An adjusted breakpoint address can significantly alter
4301 a user's expectations. Print a warning if an adjustment
4303 if (adjusted_bpaddr
!= bpaddr
)
4304 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4306 return adjusted_bpaddr
;
4310 /* Allocate a struct bp_location. */
4312 static struct bp_location
*
4313 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
4315 struct bp_location
*loc
, *loc_p
;
4317 loc
= xmalloc (sizeof (struct bp_location
));
4318 memset (loc
, 0, sizeof (*loc
));
4322 loc
->shlib_disabled
= 0;
4331 case bp_longjmp_resume
:
4332 case bp_step_resume
:
4333 case bp_watchpoint_scope
:
4335 case bp_shlib_event
:
4336 case bp_thread_event
:
4337 case bp_overlay_event
:
4339 case bp_catch_unload
:
4340 loc
->loc_type
= bp_loc_software_breakpoint
;
4342 case bp_hardware_breakpoint
:
4343 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4345 case bp_hardware_watchpoint
:
4346 case bp_read_watchpoint
:
4347 case bp_access_watchpoint
:
4348 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4352 case bp_catch_vfork
:
4354 loc
->loc_type
= bp_loc_other
;
4357 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4363 static void free_bp_location (struct bp_location
*loc
)
4368 if (loc
->function_name
)
4369 xfree (loc
->function_name
);
4374 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4375 that has type BPTYPE and has no locations as yet. */
4377 static struct breakpoint
*
4378 set_raw_breakpoint_without_location (enum bptype bptype
)
4380 struct breakpoint
*b
, *b1
;
4382 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4383 memset (b
, 0, sizeof (*b
));
4386 b
->language
= current_language
->la_language
;
4387 b
->input_radix
= input_radix
;
4389 b
->enable_state
= bp_enabled
;
4392 b
->ignore_count
= 0;
4394 b
->frame_id
= null_frame_id
;
4395 b
->dll_pathname
= NULL
;
4396 b
->triggered_dll_pathname
= NULL
;
4397 b
->forked_inferior_pid
= null_ptid
;
4398 b
->exec_pathname
= NULL
;
4400 b
->condition_not_parsed
= 0;
4402 /* Add this breakpoint to the end of the chain
4403 so that a list of breakpoints will come out in order
4404 of increasing numbers. */
4406 b1
= breakpoint_chain
;
4408 breakpoint_chain
= b
;
4418 /* Initialize loc->function_name. */
4420 set_breakpoint_location_function (struct bp_location
*loc
)
4422 if (loc
->owner
->type
== bp_breakpoint
4423 || loc
->owner
->type
== bp_hardware_breakpoint
)
4425 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4427 if (loc
->function_name
)
4428 loc
->function_name
= xstrdup (loc
->function_name
);
4432 /* set_raw_breakpoint is a low level routine for allocating and
4433 partially initializing a breakpoint of type BPTYPE. The newly
4434 created breakpoint's address, section, source file name, and line
4435 number are provided by SAL. The newly created and partially
4436 initialized breakpoint is added to the breakpoint chain and
4437 is also returned as the value of this function.
4439 It is expected that the caller will complete the initialization of
4440 the newly created breakpoint struct as well as output any status
4441 information regarding the creation of a new breakpoint. In
4442 particular, set_raw_breakpoint does NOT set the breakpoint
4443 number! Care should be taken to not allow an error to occur
4444 prior to completing the initialization of the breakpoint. If this
4445 should happen, a bogus breakpoint will be left on the chain. */
4448 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4450 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4451 CORE_ADDR adjusted_address
;
4453 /* Adjust the breakpoint's address prior to allocating a location.
4454 Once we call allocate_bp_location(), that mostly uninitialized
4455 location will be placed on the location chain. Adjustment of the
4456 breakpoint may cause target_read_memory() to be called and we do
4457 not want its scan of the location chain to find a breakpoint and
4458 location that's only been partially initialized. */
4459 adjusted_address
= adjust_breakpoint_address (sal
.pc
, bptype
);
4461 b
->loc
= allocate_bp_location (b
, bptype
);
4462 b
->loc
->requested_address
= sal
.pc
;
4463 b
->loc
->address
= adjusted_address
;
4465 if (sal
.symtab
== NULL
)
4466 b
->source_file
= NULL
;
4468 b
->source_file
= savestring (sal
.symtab
->filename
,
4469 strlen (sal
.symtab
->filename
));
4470 b
->loc
->section
= sal
.section
;
4471 b
->line_number
= sal
.line
;
4473 set_breakpoint_location_function (b
->loc
);
4475 breakpoints_changed ();
4481 /* Note that the breakpoint object B describes a permanent breakpoint
4482 instruction, hard-wired into the inferior's code. */
4484 make_breakpoint_permanent (struct breakpoint
*b
)
4486 struct bp_location
*bl
;
4487 b
->enable_state
= bp_permanent
;
4489 /* By definition, permanent breakpoints are already present in the code.
4490 Mark all locations as inserted. For now, make_breakpoint_permanent
4491 is called in just one place, so it's hard to say if it's reasonable
4492 to have permanent breakpoint with multiple locations or not,
4493 but it's easy to implmement. */
4494 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4498 static struct breakpoint
*
4499 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4501 static int internal_breakpoint_number
= -1;
4502 struct symtab_and_line sal
;
4503 struct breakpoint
*b
;
4505 init_sal (&sal
); /* initialize to zeroes */
4508 sal
.section
= find_pc_overlay (sal
.pc
);
4510 b
= set_raw_breakpoint (sal
, type
);
4511 b
->number
= internal_breakpoint_number
--;
4512 b
->disposition
= disp_donttouch
;
4519 create_longjmp_breakpoint (char *func_name
)
4521 struct minimal_symbol
*m
;
4523 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4525 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4526 update_global_location_list (1);
4529 /* Call this routine when stepping and nexting to enable a breakpoint
4530 if we do a longjmp(). When we hit that breakpoint, call
4531 set_longjmp_resume_breakpoint() to figure out where we are going. */
4534 set_longjmp_breakpoint (void)
4536 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4538 create_longjmp_breakpoint ("longjmp");
4539 create_longjmp_breakpoint ("_longjmp");
4540 create_longjmp_breakpoint ("siglongjmp");
4541 create_longjmp_breakpoint ("_siglongjmp");
4545 /* Delete all longjmp breakpoints from THREAD. */
4547 delete_longjmp_breakpoint (int thread
)
4549 struct breakpoint
*b
, *temp
;
4551 ALL_BREAKPOINTS_SAFE (b
, temp
)
4552 if (b
->type
== bp_longjmp
)
4554 if (b
->thread
== thread
)
4555 delete_breakpoint (b
);
4560 create_overlay_event_breakpoint_1 (char *func_name
, struct objfile
*objfile
)
4562 struct breakpoint
*b
;
4563 struct minimal_symbol
*m
;
4565 if ((m
= lookup_minimal_symbol_text (func_name
, objfile
)) == NULL
)
4568 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4570 b
->addr_string
= xstrdup (func_name
);
4572 if (overlay_debugging
== ovly_auto
)
4574 b
->enable_state
= bp_enabled
;
4575 overlay_events_enabled
= 1;
4579 b
->enable_state
= bp_disabled
;
4580 overlay_events_enabled
= 0;
4582 update_global_location_list (1);
4586 create_overlay_event_breakpoint (char *func_name
)
4588 struct objfile
*objfile
;
4589 ALL_OBJFILES (objfile
)
4590 create_overlay_event_breakpoint_1 (func_name
, objfile
);
4594 enable_overlay_breakpoints (void)
4596 struct breakpoint
*b
;
4599 if (b
->type
== bp_overlay_event
)
4601 b
->enable_state
= bp_enabled
;
4602 update_global_location_list (1);
4603 overlay_events_enabled
= 1;
4608 disable_overlay_breakpoints (void)
4610 struct breakpoint
*b
;
4613 if (b
->type
== bp_overlay_event
)
4615 b
->enable_state
= bp_disabled
;
4616 update_global_location_list (0);
4617 overlay_events_enabled
= 0;
4622 create_thread_event_breakpoint (CORE_ADDR address
)
4624 struct breakpoint
*b
;
4626 b
= create_internal_breakpoint (address
, bp_thread_event
);
4628 b
->enable_state
= bp_enabled
;
4629 /* addr_string has to be used or breakpoint_re_set will delete me. */
4630 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4632 update_global_location_list_nothrow (1);
4638 remove_thread_event_breakpoints (void)
4640 struct breakpoint
*b
, *temp
;
4642 ALL_BREAKPOINTS_SAFE (b
, temp
)
4643 if (b
->type
== bp_thread_event
)
4644 delete_breakpoint (b
);
4647 struct captured_parse_breakpoint_args
4650 struct symtabs_and_lines
*sals_p
;
4651 char ***addr_string_p
;
4655 struct lang_and_radix
4663 remove_solib_event_breakpoints (void)
4665 struct breakpoint
*b
, *temp
;
4667 ALL_BREAKPOINTS_SAFE (b
, temp
)
4668 if (b
->type
== bp_shlib_event
)
4669 delete_breakpoint (b
);
4673 create_solib_event_breakpoint (CORE_ADDR address
)
4675 struct breakpoint
*b
;
4677 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4678 update_global_location_list_nothrow (1);
4682 /* Disable any breakpoints that are on code in shared libraries. Only
4683 apply to enabled breakpoints, disabled ones can just stay disabled. */
4686 disable_breakpoints_in_shlibs (void)
4688 struct bp_location
*loc
;
4689 int disabled_shlib_breaks
= 0;
4691 ALL_BP_LOCATIONS (loc
)
4693 struct breakpoint
*b
= loc
->owner
;
4694 /* We apply the check to all breakpoints, including disabled
4695 for those with loc->duplicate set. This is so that when breakpoint
4696 becomes enabled, or the duplicate is removed, gdb will try to insert
4697 all breakpoints. If we don't set shlib_disabled here, we'll try
4698 to insert those breakpoints and fail. */
4699 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4700 && !loc
->shlib_disabled
4702 && PC_SOLIB (loc
->address
)
4704 && solib_address (loc
->address
)
4708 loc
->shlib_disabled
= 1;
4713 /* Disable any breakpoints that are in in an unloaded shared library. Only
4714 apply to enabled breakpoints, disabled ones can just stay disabled. */
4717 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4719 struct bp_location
*loc
;
4720 int disabled_shlib_breaks
= 0;
4722 ALL_BP_LOCATIONS (loc
)
4724 struct breakpoint
*b
= loc
->owner
;
4725 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4726 || loc
->loc_type
== bp_loc_software_breakpoint
)
4727 && !loc
->shlib_disabled
)
4730 char *so_name
= PC_SOLIB (loc
->address
);
4732 char *so_name
= solib_address (loc
->address
);
4734 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4736 loc
->shlib_disabled
= 1;
4737 /* At this point, we cannot rely on remove_breakpoint
4738 succeeding so we must mark the breakpoint as not inserted
4739 to prevent future errors occurring in remove_breakpoints. */
4741 if (!disabled_shlib_breaks
)
4743 target_terminal_ours_for_output ();
4744 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4747 disabled_shlib_breaks
= 1;
4754 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4755 enum bptype bp_kind
)
4757 struct symtab_and_line sal
;
4758 struct breakpoint
*b
;
4759 int thread
= -1; /* All threads. */
4766 b
= set_raw_breakpoint (sal
, bp_kind
);
4767 set_breakpoint_count (breakpoint_count
+ 1);
4768 b
->number
= breakpoint_count
;
4769 b
->cond_string
= (cond_string
== NULL
) ?
4770 NULL
: savestring (cond_string
, strlen (cond_string
));
4772 b
->addr_string
= NULL
;
4773 b
->enable_state
= bp_enabled
;
4774 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4775 b
->forked_inferior_pid
= null_ptid
;
4776 update_global_location_list (1);
4783 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4785 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4789 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4791 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4795 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4797 struct symtab_and_line sal
;
4798 struct breakpoint
*b
;
4799 int thread
= -1; /* All threads. */
4806 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4807 set_breakpoint_count (breakpoint_count
+ 1);
4808 b
->number
= breakpoint_count
;
4809 b
->cond_string
= (cond_string
== NULL
) ?
4810 NULL
: savestring (cond_string
, strlen (cond_string
));
4812 b
->addr_string
= NULL
;
4813 b
->enable_state
= bp_enabled
;
4814 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4815 update_global_location_list (1);
4821 hw_breakpoint_used_count (void)
4823 struct breakpoint
*b
;
4828 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
4836 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4838 struct breakpoint
*b
;
4841 *other_type_used
= 0;
4844 if (breakpoint_enabled (b
))
4846 if (b
->type
== type
)
4848 else if ((b
->type
== bp_hardware_watchpoint
||
4849 b
->type
== bp_read_watchpoint
||
4850 b
->type
== bp_access_watchpoint
))
4851 *other_type_used
= 1;
4858 disable_watchpoints_before_interactive_call_start (void)
4860 struct breakpoint
*b
;
4864 if (((b
->type
== bp_watchpoint
)
4865 || (b
->type
== bp_hardware_watchpoint
)
4866 || (b
->type
== bp_read_watchpoint
)
4867 || (b
->type
== bp_access_watchpoint
))
4868 && breakpoint_enabled (b
))
4870 b
->enable_state
= bp_call_disabled
;
4871 update_global_location_list (0);
4877 enable_watchpoints_after_interactive_call_stop (void)
4879 struct breakpoint
*b
;
4883 if (((b
->type
== bp_watchpoint
)
4884 || (b
->type
== bp_hardware_watchpoint
)
4885 || (b
->type
== bp_read_watchpoint
)
4886 || (b
->type
== bp_access_watchpoint
))
4887 && (b
->enable_state
== bp_call_disabled
))
4889 b
->enable_state
= bp_enabled
;
4890 update_global_location_list (1);
4896 /* Set a breakpoint that will evaporate an end of command
4897 at address specified by SAL.
4898 Restrict it to frame FRAME if FRAME is nonzero. */
4901 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4904 struct breakpoint
*b
;
4905 b
= set_raw_breakpoint (sal
, type
);
4906 b
->enable_state
= bp_enabled
;
4907 b
->disposition
= disp_donttouch
;
4908 b
->frame_id
= frame_id
;
4910 /* If we're debugging a multi-threaded program, then we
4911 want momentary breakpoints to be active in only a
4912 single thread of control. */
4913 if (in_thread_list (inferior_ptid
))
4914 b
->thread
= pid_to_thread_id (inferior_ptid
);
4916 update_global_location_list_nothrow (1);
4922 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
4924 struct symtab_and_line sal
;
4926 sal
= find_pc_line (pc
, 0);
4928 sal
.section
= find_pc_overlay (pc
);
4929 sal
.explicit_pc
= 1;
4931 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
4935 /* Tell the user we have just set a breakpoint B. */
4938 mention (struct breakpoint
*b
)
4941 struct cleanup
*old_chain
, *ui_out_chain
;
4942 struct ui_stream
*stb
;
4944 stb
= ui_out_stream_new (uiout
);
4945 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4947 /* FIXME: This is misplaced; mention() is called by things (like
4948 hitting a watchpoint) other than breakpoint creation. It should
4949 be possible to clean this up and at the same time replace the
4950 random calls to breakpoint_changed with this hook. */
4951 observer_notify_breakpoint_created (b
->number
);
4953 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4954 b
->ops
->print_mention (b
);
4959 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4962 ui_out_text (uiout
, "Watchpoint ");
4963 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4964 ui_out_field_int (uiout
, "number", b
->number
);
4965 ui_out_text (uiout
, ": ");
4966 print_expression (b
->exp
, stb
->stream
);
4967 ui_out_field_stream (uiout
, "exp", stb
);
4968 do_cleanups (ui_out_chain
);
4970 case bp_hardware_watchpoint
:
4971 ui_out_text (uiout
, "Hardware watchpoint ");
4972 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4973 ui_out_field_int (uiout
, "number", b
->number
);
4974 ui_out_text (uiout
, ": ");
4975 print_expression (b
->exp
, stb
->stream
);
4976 ui_out_field_stream (uiout
, "exp", stb
);
4977 do_cleanups (ui_out_chain
);
4979 case bp_read_watchpoint
:
4980 ui_out_text (uiout
, "Hardware read watchpoint ");
4981 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4982 ui_out_field_int (uiout
, "number", b
->number
);
4983 ui_out_text (uiout
, ": ");
4984 print_expression (b
->exp
, stb
->stream
);
4985 ui_out_field_stream (uiout
, "exp", stb
);
4986 do_cleanups (ui_out_chain
);
4988 case bp_access_watchpoint
:
4989 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4990 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4991 ui_out_field_int (uiout
, "number", b
->number
);
4992 ui_out_text (uiout
, ": ");
4993 print_expression (b
->exp
, stb
->stream
);
4994 ui_out_field_stream (uiout
, "exp", stb
);
4995 do_cleanups (ui_out_chain
);
4998 if (ui_out_is_mi_like_p (uiout
))
5003 if (b
->disposition
== disp_del
)
5004 printf_filtered (_("Temporary breakpoint"));
5006 printf_filtered (_("Breakpoint"));
5007 printf_filtered (_(" %d"), b
->number
);
5010 case bp_hardware_breakpoint
:
5011 if (ui_out_is_mi_like_p (uiout
))
5016 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
5020 case bp_catch_unload
:
5021 printf_filtered (_("Catchpoint %d (%s %s)"),
5023 (b
->type
== bp_catch_load
) ? "load" : "unload",
5024 (b
->dll_pathname
!= NULL
) ?
5025 b
->dll_pathname
: "<any library>");
5028 case bp_catch_vfork
:
5029 printf_filtered (_("Catchpoint %d (%s)"),
5031 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
5034 printf_filtered (_("Catchpoint %d (exec)"),
5041 case bp_longjmp_resume
:
5042 case bp_step_resume
:
5044 case bp_watchpoint_scope
:
5045 case bp_shlib_event
:
5046 case bp_thread_event
:
5047 case bp_overlay_event
:
5053 /* i18n: cagney/2005-02-11: Below needs to be merged into a
5057 printf_filtered (_(" (%s) pending."), b
->addr_string
);
5061 if (addressprint
|| b
->source_file
== NULL
)
5063 printf_filtered (" at ");
5064 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5067 printf_filtered (": file %s, line %d.",
5068 b
->source_file
, b
->line_number
);
5072 struct bp_location
*loc
= b
->loc
;
5074 for (; loc
; loc
= loc
->next
)
5076 printf_filtered (" (%d locations)", n
);
5081 do_cleanups (old_chain
);
5082 if (ui_out_is_mi_like_p (uiout
))
5084 printf_filtered ("\n");
5088 static struct bp_location
*
5089 add_location_to_breakpoint (struct breakpoint
*b
, enum bptype bptype
,
5090 const struct symtab_and_line
*sal
)
5092 struct bp_location
*loc
, **tmp
;
5094 loc
= allocate_bp_location (b
, bptype
);
5095 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5098 loc
->requested_address
= sal
->pc
;
5099 loc
->address
= adjust_breakpoint_address (loc
->requested_address
,
5101 loc
->section
= sal
->section
;
5103 set_breakpoint_location_function (loc
);
5108 /* Return 1 if LOC is pointing to a permanent breakpoint,
5109 return 0 otherwise. */
5112 bp_loc_is_permanent (struct bp_location
*loc
)
5116 const gdb_byte
*brk
;
5117 gdb_byte
*target_mem
;
5119 gdb_assert (loc
!= NULL
);
5121 addr
= loc
->address
;
5122 brk
= gdbarch_breakpoint_from_pc (current_gdbarch
, &addr
, &len
);
5124 target_mem
= alloca (len
);
5126 if (target_read_memory (loc
->address
, target_mem
, len
) == 0
5127 && memcmp (target_mem
, brk
, len
) == 0)
5135 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5136 as textual description of the location, and COND_STRING
5137 as condition expression. */
5140 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5142 enum bptype type
, enum bpdisp disposition
,
5143 int thread
, int ignore_count
,
5144 struct breakpoint_ops
*ops
, int from_tty
)
5146 struct breakpoint
*b
= NULL
;
5149 if (type
== bp_hardware_breakpoint
)
5151 int i
= hw_breakpoint_used_count ();
5152 int target_resources_ok
=
5153 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5155 if (target_resources_ok
== 0)
5156 error (_("No hardware breakpoint support in the target."));
5157 else if (target_resources_ok
< 0)
5158 error (_("Hardware breakpoints used exceeds limit."));
5161 for (i
= 0; i
< sals
.nelts
; ++i
)
5163 struct symtab_and_line sal
= sals
.sals
[i
];
5164 struct bp_location
*loc
;
5167 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5171 b
= set_raw_breakpoint (sal
, type
);
5172 set_breakpoint_count (breakpoint_count
+ 1);
5173 b
->number
= breakpoint_count
;
5176 b
->cond_string
= cond_string
;
5177 b
->ignore_count
= ignore_count
;
5178 b
->enable_state
= bp_enabled
;
5179 b
->disposition
= disposition
;
5185 loc
= add_location_to_breakpoint (b
, type
, &sal
);
5188 if (bp_loc_is_permanent (loc
))
5189 make_breakpoint_permanent (b
);
5193 char *arg
= b
->cond_string
;
5194 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5196 error (_("Garbage %s follows condition"), arg
);
5201 b
->addr_string
= addr_string
;
5203 /* addr_string has to be used or breakpoint_re_set will delete
5205 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5211 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5212 elements to fill the void space. */
5213 static void remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5215 int i
= index_to_remove
+1;
5216 int last_index
= sal
->nelts
-1;
5218 for (;i
<= last_index
; ++i
)
5219 sal
->sals
[i
-1] = sal
->sals
[i
];
5224 /* If appropriate, obtains all sals that correspond
5225 to the same file and line as SAL. This is done
5226 only if SAL does not have explicit PC and has
5227 line and file information. If we got just a single
5228 expanded sal, return the original.
5230 Otherwise, if SAL.explicit_line is not set, filter out
5231 all sals for which the name of enclosing function
5232 is different from SAL. This makes sure that if we have
5233 breakpoint originally set in template instantiation, say
5234 foo<int>(), we won't expand SAL to locations at the same
5235 line in all existing instantiations of 'foo'.
5238 struct symtabs_and_lines
5239 expand_line_sal_maybe (struct symtab_and_line sal
)
5241 struct symtabs_and_lines expanded
;
5242 CORE_ADDR original_pc
= sal
.pc
;
5243 char *original_function
= NULL
;
5247 /* If we have explicit pc, don't expand.
5248 If we have no line number, we can't expand. */
5249 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5252 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5253 expanded
.sals
[0] = sal
;
5258 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5260 expanded
= expand_line_sal (sal
);
5261 if (expanded
.nelts
== 1)
5263 /* We had one sal, we got one sal. Without futher
5264 processing, just return the original sal. */
5265 xfree (expanded
.sals
);
5267 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5268 sal
.pc
= original_pc
;
5269 expanded
.sals
[0] = sal
;
5273 if (!sal
.explicit_line
)
5275 CORE_ADDR func_addr
, func_end
;
5276 for (i
= 0; i
< expanded
.nelts
; ++i
)
5278 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5279 char *this_function
;
5280 if (find_pc_partial_function (pc
, &this_function
,
5281 &func_addr
, &func_end
))
5283 if (this_function
&&
5284 strcmp (this_function
, original_function
) != 0)
5286 remove_sal (&expanded
, i
);
5289 else if (func_addr
== pc
)
5291 /* We're at beginning of a function, and should
5293 struct symbol
*sym
= find_pc_function (pc
);
5295 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5298 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5305 if (expanded
.nelts
<= 1)
5307 /* This is un ugly workaround. If we get zero
5308 expanded sals then something is really wrong.
5309 Fix that by returnign the original sal. */
5310 xfree (expanded
.sals
);
5312 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5313 sal
.pc
= original_pc
;
5314 expanded
.sals
[0] = sal
;
5321 for (i
= 0; i
< expanded
.nelts
; ++i
)
5322 if (expanded
.sals
[i
].pc
== original_pc
)
5333 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5334 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5335 value. COND_STRING, if not NULL, specified the condition to be
5336 used for all breakpoints. Essentially the only case where
5337 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5338 function. In that case, it's still not possible to specify
5339 separate conditions for different overloaded functions, so
5340 we take just a single condition string.
5342 NOTE: If the function succeeds, the caller is expected to cleanup
5343 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5344 array contents). If the function fails (error() is called), the
5345 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5346 COND and SALS arrays and each of those arrays contents. */
5349 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5351 enum bptype type
, enum bpdisp disposition
,
5352 int thread
, int ignore_count
,
5353 struct breakpoint_ops
*ops
, int from_tty
)
5356 for (i
= 0; i
< sals
.nelts
; ++i
)
5358 struct symtabs_and_lines expanded
=
5359 expand_line_sal_maybe (sals
.sals
[i
]);
5361 create_breakpoint (expanded
, addr_string
[i
],
5362 cond_string
, type
, disposition
,
5363 thread
, ignore_count
, ops
, from_tty
);
5366 update_global_location_list (1);
5369 /* Parse ARG which is assumed to be a SAL specification possibly
5370 followed by conditionals. On return, SALS contains an array of SAL
5371 addresses found. ADDR_STRING contains a vector of (canonical)
5372 address strings. ARG points to the end of the SAL. */
5375 parse_breakpoint_sals (char **address
,
5376 struct symtabs_and_lines
*sals
,
5377 char ***addr_string
,
5380 char *addr_start
= *address
;
5381 *addr_string
= NULL
;
5382 /* If no arg given, or if first arg is 'if ', use the default
5384 if ((*address
) == NULL
5385 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5387 if (default_breakpoint_valid
)
5389 struct symtab_and_line sal
;
5390 init_sal (&sal
); /* initialize to zeroes */
5391 sals
->sals
= (struct symtab_and_line
*)
5392 xmalloc (sizeof (struct symtab_and_line
));
5393 sal
.pc
= default_breakpoint_address
;
5394 sal
.line
= default_breakpoint_line
;
5395 sal
.symtab
= default_breakpoint_symtab
;
5396 sal
.section
= find_pc_overlay (sal
.pc
);
5397 sals
->sals
[0] = sal
;
5401 error (_("No default breakpoint address now."));
5405 /* Force almost all breakpoints to be in terms of the
5406 current_source_symtab (which is decode_line_1's default). This
5407 should produce the results we want almost all of the time while
5408 leaving default_breakpoint_* alone.
5409 ObjC: However, don't match an Objective-C method name which
5410 may have a '+' or '-' succeeded by a '[' */
5412 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5414 if (default_breakpoint_valid
5416 || ((strchr ("+-", (*address
)[0]) != NULL
)
5417 && ((*address
)[1] != '['))))
5418 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5419 default_breakpoint_line
, addr_string
,
5422 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5423 addr_string
, not_found_ptr
);
5425 /* For any SAL that didn't have a canonical string, fill one in. */
5426 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5427 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5428 if (addr_start
!= (*address
))
5431 for (i
= 0; i
< sals
->nelts
; i
++)
5433 /* Add the string if not present. */
5434 if ((*addr_string
)[i
] == NULL
)
5435 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5441 /* Convert each SAL into a real PC. Verify that the PC can be
5442 inserted as a breakpoint. If it can't throw an error. */
5445 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5449 for (i
= 0; i
< sals
->nelts
; i
++)
5450 resolve_sal_pc (&sals
->sals
[i
]);
5454 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5456 struct captured_parse_breakpoint_args
*args
= data
;
5458 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5459 args
->not_found_ptr
);
5462 /* Given TOK, a string specification of condition and thread, as
5463 accepted by the 'break' command, extract the condition
5464 string and thread number and set *COND_STRING and *THREAD.
5465 PC identifies the context at which the condition should be parsed.
5466 If no condition is found, *COND_STRING is set to NULL.
5467 If no thread is found, *THREAD is set to -1. */
5469 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5470 char **cond_string
, int *thread
)
5472 *cond_string
= NULL
;
5478 char *cond_start
= NULL
;
5479 char *cond_end
= NULL
;
5480 while (*tok
== ' ' || *tok
== '\t')
5485 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5488 toklen
= end_tok
- tok
;
5490 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5492 tok
= cond_start
= end_tok
+ 1;
5493 parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5495 *cond_string
= savestring (cond_start
,
5496 cond_end
- cond_start
);
5498 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5504 *thread
= strtol (tok
, &tok
, 0);
5506 error (_("Junk after thread keyword."));
5507 if (!valid_thread_id (*thread
))
5508 error (_("Unknown thread %d."), *thread
);
5511 error (_("Junk at end of arguments."));
5515 /* Set a breakpoint. This function is shared between
5516 CLI and MI functions for setting a breakpoint.
5517 This function has two major modes of operations,
5518 selected by the PARSE_CONDITION_AND_THREAD parameter.
5519 If non-zero, the function will parse arg, extracting
5520 breakpoint location, address and thread. Otherwise,
5521 ARG is just the location of breakpoint, with condition
5522 and thread specified by the COND_STRING and THREAD
5526 break_command_really (char *arg
, char *cond_string
, int thread
,
5527 int parse_condition_and_thread
,
5528 int tempflag
, int hardwareflag
,
5530 enum auto_boolean pending_break_support
,
5531 struct breakpoint_ops
*ops
,
5534 struct gdb_exception e
;
5535 struct symtabs_and_lines sals
;
5536 struct symtab_and_line pending_sal
;
5539 char *addr_start
= arg
;
5541 struct cleanup
*old_chain
;
5542 struct cleanup
*breakpoint_chain
= NULL
;
5543 struct captured_parse_breakpoint_args parse_args
;
5552 parse_args
.arg_p
= &arg
;
5553 parse_args
.sals_p
= &sals
;
5554 parse_args
.addr_string_p
= &addr_string
;
5555 parse_args
.not_found_ptr
= ¬_found
;
5557 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5558 &parse_args
, RETURN_MASK_ALL
);
5560 /* If caller is interested in rc value from parse, set value. */
5564 throw_exception (e
);
5568 case NOT_FOUND_ERROR
:
5570 /* If pending breakpoint support is turned off, throw
5573 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5574 throw_exception (e
);
5576 exception_print (gdb_stderr
, e
);
5578 /* If pending breakpoint support is auto query and the user
5579 selects no, then simply return the error code. */
5580 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5581 !nquery ("Make breakpoint pending on future shared library load? "))
5584 /* At this point, either the user was queried about setting
5585 a pending breakpoint and selected yes, or pending
5586 breakpoint behavior is on and thus a pending breakpoint
5587 is defaulted on behalf of the user. */
5588 copy_arg
= xstrdup (addr_start
);
5589 addr_string
= ©_arg
;
5591 sals
.sals
= &pending_sal
;
5596 throw_exception (e
);
5603 /* Create a chain of things that always need to be cleaned up. */
5604 old_chain
= make_cleanup (null_cleanup
, 0);
5608 /* Make sure that all storage allocated to SALS gets freed. */
5609 make_cleanup (xfree
, sals
.sals
);
5611 /* Cleanup the addr_string array but not its contents. */
5612 make_cleanup (xfree
, addr_string
);
5615 /* ----------------------------- SNIP -----------------------------
5616 Anything added to the cleanup chain beyond this point is assumed
5617 to be part of a breakpoint. If the breakpoint create succeeds
5618 then the memory is not reclaimed. */
5619 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5621 /* Mark the contents of the addr_string for cleanup. These go on
5622 the breakpoint_chain and only occure if the breakpoint create
5624 for (i
= 0; i
< sals
.nelts
; i
++)
5626 if (addr_string
[i
] != NULL
)
5627 make_cleanup (xfree
, addr_string
[i
]);
5630 /* Resolve all line numbers to PC's and verify that the addresses
5631 are ok for the target. */
5633 breakpoint_sals_to_pc (&sals
, addr_start
);
5635 /* Verify that condition can be parsed, before setting any
5636 breakpoints. Allocate a separate condition expression for each
5640 if (parse_condition_and_thread
)
5642 /* Here we only parse 'arg' to separate condition
5643 from thread number, so parsing in context of first
5644 sal is OK. When setting the breakpoint we'll
5645 re-parse it in context of each sal. */
5648 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5650 make_cleanup (xfree
, cond_string
);
5654 /* Create a private copy of condition string. */
5657 cond_string
= xstrdup (cond_string
);
5658 make_cleanup (xfree
, cond_string
);
5661 create_breakpoints (sals
, addr_string
, cond_string
,
5662 hardwareflag
? bp_hardware_breakpoint
5664 tempflag
? disp_del
: disp_donttouch
,
5665 thread
, ignore_count
, ops
, from_tty
);
5669 struct symtab_and_line sal
= {0};
5670 struct breakpoint
*b
;
5672 make_cleanup (xfree
, copy_arg
);
5674 b
= set_raw_breakpoint_without_location (hardwareflag
5675 ? bp_hardware_breakpoint
5677 set_breakpoint_count (breakpoint_count
+ 1);
5678 b
->number
= breakpoint_count
;
5680 b
->addr_string
= addr_string
[0];
5681 b
->cond_string
= NULL
;
5682 b
->ignore_count
= ignore_count
;
5683 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5684 b
->condition_not_parsed
= 1;
5687 update_global_location_list (1);
5692 warning (_("Multiple breakpoints were set.\n"
5693 "Use the \"delete\" command to delete unwanted breakpoints."));
5694 /* That's it. Discard the cleanups for data inserted into the
5696 discard_cleanups (breakpoint_chain
);
5697 /* But cleanup everything else. */
5698 do_cleanups (old_chain
);
5701 /* Set a breakpoint.
5702 ARG is a string describing breakpoint address,
5703 condition, and thread.
5704 FLAG specifies if a breakpoint is hardware on,
5705 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5709 break_command_1 (char *arg
, int flag
, int from_tty
)
5711 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5712 int tempflag
= flag
& BP_TEMPFLAG
;
5714 break_command_really (arg
,
5715 NULL
, 0, 1 /* parse arg */,
5716 tempflag
, hardwareflag
,
5717 0 /* Ignore count */,
5718 pending_break_support
,
5719 NULL
/* breakpoint_ops */,
5725 set_breakpoint (char *address
, char *condition
,
5726 int hardwareflag
, int tempflag
,
5727 int thread
, int ignore_count
,
5730 break_command_really (address
, condition
, thread
,
5731 0 /* condition and thread are valid. */,
5732 tempflag
, hardwareflag
,
5735 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5739 /* Adjust SAL to the first instruction past the function prologue.
5740 The end of the prologue is determined using the line table from
5741 the debugging information.
5743 If SAL is already past the prologue, then do nothing. */
5746 skip_prologue_sal (struct symtab_and_line
*sal
)
5748 struct symbol
*sym
= find_pc_function (sal
->pc
);
5749 struct symtab_and_line start_sal
;
5754 start_sal
= find_function_start_sal (sym
, 1);
5755 if (sal
->pc
< start_sal
.pc
)
5759 /* Helper function for break_command_1 and disassemble_command. */
5762 resolve_sal_pc (struct symtab_and_line
*sal
)
5766 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5768 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5769 error (_("No line %d in file \"%s\"."),
5770 sal
->line
, sal
->symtab
->filename
);
5773 /* If this SAL corresponds to a breakpoint inserted using
5774 a line number, then skip the function prologue if necessary. */
5775 if (sal
->explicit_line
)
5776 skip_prologue_sal (sal
);
5779 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5781 struct blockvector
*bv
;
5785 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5788 sym
= block_linkage_function (b
);
5791 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5792 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
5796 /* It really is worthwhile to have the section, so we'll just
5797 have to look harder. This case can be executed if we have
5798 line numbers but no functions (as can happen in assembly
5801 struct minimal_symbol
*msym
;
5803 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5805 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
5812 break_command (char *arg
, int from_tty
)
5814 break_command_1 (arg
, 0, from_tty
);
5818 tbreak_command (char *arg
, int from_tty
)
5820 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5824 hbreak_command (char *arg
, int from_tty
)
5826 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5830 thbreak_command (char *arg
, int from_tty
)
5832 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5836 stop_command (char *arg
, int from_tty
)
5838 printf_filtered (_("Specify the type of breakpoint to set.\n\
5839 Usage: stop in <function | address>\n\
5840 stop at <line>\n"));
5844 stopin_command (char *arg
, int from_tty
)
5848 if (arg
== (char *) NULL
)
5850 else if (*arg
!= '*')
5855 /* look for a ':'. If this is a line number specification, then
5856 say it is bad, otherwise, it should be an address or
5857 function/method name */
5858 while (*argptr
&& !hasColon
)
5860 hasColon
= (*argptr
== ':');
5865 badInput
= (*argptr
!= ':'); /* Not a class::method */
5867 badInput
= isdigit (*arg
); /* a simple line number */
5871 printf_filtered (_("Usage: stop in <function | address>\n"));
5873 break_command_1 (arg
, 0, from_tty
);
5877 stopat_command (char *arg
, int from_tty
)
5881 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5888 /* look for a ':'. If there is a '::' then get out, otherwise
5889 it is probably a line number. */
5890 while (*argptr
&& !hasColon
)
5892 hasColon
= (*argptr
== ':');
5897 badInput
= (*argptr
== ':'); /* we have class::method */
5899 badInput
= !isdigit (*arg
); /* not a line number */
5903 printf_filtered (_("Usage: stop at <line>\n"));
5905 break_command_1 (arg
, 0, from_tty
);
5908 /* accessflag: hw_write: watch write,
5909 hw_read: watch read,
5910 hw_access: watch access (read or write) */
5912 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5914 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
5915 struct symtab_and_line sal
;
5916 struct expression
*exp
;
5917 struct block
*exp_valid_block
;
5918 struct value
*val
, *mark
;
5919 struct frame_info
*frame
;
5920 struct frame_info
*prev_frame
= NULL
;
5921 char *exp_start
= NULL
;
5922 char *exp_end
= NULL
;
5923 char *tok
, *id_tok_start
, *end_tok
;
5925 char *cond_start
= NULL
;
5926 char *cond_end
= NULL
;
5927 struct expression
*cond
= NULL
;
5928 int i
, other_type_used
, target_resources_ok
= 0;
5929 enum bptype bp_type
;
5933 init_sal (&sal
); /* initialize to zeroes */
5935 /* Make sure that we actually have parameters to parse. */
5936 if (arg
!= NULL
&& arg
[0] != '\0')
5938 toklen
= strlen (arg
); /* Size of argument list. */
5940 /* Points tok to the end of the argument list. */
5941 tok
= arg
+ toklen
- 1;
5943 /* Go backwards in the parameters list. Skip the last parameter.
5944 If we're expecting a 'thread <thread_num>' parameter, this should
5945 be the thread identifier. */
5946 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5948 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5951 /* Points end_tok to the beginning of the last token. */
5952 id_tok_start
= tok
+ 1;
5954 /* Go backwards in the parameters list. Skip one more parameter.
5955 If we're expecting a 'thread <thread_num>' parameter, we should
5956 reach a "thread" token. */
5957 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5962 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5965 /* Move the pointer forward to skip the whitespace and
5966 calculate the length of the token. */
5968 toklen
= end_tok
- tok
;
5970 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5972 /* At this point we've found a "thread" token, which means
5973 the user is trying to set a watchpoint that triggers
5974 only in a specific thread. */
5977 /* Extract the thread ID from the next token. */
5978 thread
= strtol (id_tok_start
, &endp
, 0);
5980 /* Check if the user provided a valid numeric value for the
5982 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
5983 error (_("Invalid thread ID specification %s."), id_tok_start
);
5985 /* Check if the thread actually exists. */
5986 if (!valid_thread_id (thread
))
5987 error (_("Unknown thread %d."), thread
);
5989 /* Truncate the string and get rid of the thread <thread_num>
5990 parameter before the parameter list is parsed by the
5991 evaluate_expression() function. */
5996 /* Parse the rest of the arguments. */
5997 innermost_block
= NULL
;
5999 exp
= parse_exp_1 (&arg
, 0, 0);
6001 exp_valid_block
= innermost_block
;
6002 mark
= value_mark ();
6003 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
6005 release_value (val
);
6008 while (*tok
== ' ' || *tok
== '\t')
6012 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
6015 toklen
= end_tok
- tok
;
6016 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
6018 tok
= cond_start
= end_tok
+ 1;
6019 cond
= parse_exp_1 (&tok
, 0, 0);
6023 error (_("Junk at end of command."));
6025 if (accessflag
== hw_read
)
6026 bp_type
= bp_read_watchpoint
;
6027 else if (accessflag
== hw_access
)
6028 bp_type
= bp_access_watchpoint
;
6030 bp_type
= bp_hardware_watchpoint
;
6032 mem_cnt
= can_use_hardware_watchpoint (val
);
6033 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
6034 error (_("Expression cannot be implemented with read/access watchpoint."));
6037 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
6038 target_resources_ok
=
6039 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
6041 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
6042 error (_("Target does not support this type of hardware watchpoint."));
6044 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
6045 error (_("Target can only support one kind of HW watchpoint at a time."));
6048 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
6049 watchpoint could not be set. */
6050 if (!mem_cnt
|| target_resources_ok
<= 0)
6051 bp_type
= bp_watchpoint
;
6053 frame
= block_innermost_frame (exp_valid_block
);
6055 prev_frame
= get_prev_frame (frame
);
6059 /* If the expression is "local", then set up a "watchpoint scope"
6060 breakpoint at the point where we've left the scope of the watchpoint
6061 expression. Create the scope breakpoint before the watchpoint, so
6062 that we will encounter it first in bpstat_stop_status. */
6063 if (innermost_block
&& prev_frame
)
6065 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
6066 bp_watchpoint_scope
);
6068 scope_breakpoint
->enable_state
= bp_enabled
;
6070 /* Automatically delete the breakpoint when it hits. */
6071 scope_breakpoint
->disposition
= disp_del
;
6073 /* Only break in the proper frame (help with recursion). */
6074 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
6076 /* Set the address at which we will stop. */
6077 scope_breakpoint
->loc
->requested_address
6078 = get_frame_pc (prev_frame
);
6079 scope_breakpoint
->loc
->address
6080 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
6081 scope_breakpoint
->type
);
6084 /* Now set up the breakpoint. */
6085 b
= set_raw_breakpoint (sal
, bp_type
);
6086 set_breakpoint_count (breakpoint_count
+ 1);
6087 b
->number
= breakpoint_count
;
6089 b
->disposition
= disp_donttouch
;
6091 b
->exp_valid_block
= exp_valid_block
;
6092 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6095 b
->loc
->cond
= cond
;
6097 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6102 b
->watchpoint_frame
= get_frame_id (frame
);
6104 b
->watchpoint_frame
= null_frame_id
;
6106 if (scope_breakpoint
!= NULL
)
6108 /* The scope breakpoint is related to the watchpoint. We will
6109 need to act on them together. */
6110 b
->related_breakpoint
= scope_breakpoint
;
6111 scope_breakpoint
->related_breakpoint
= b
;
6114 value_free_to_mark (mark
);
6116 update_global_location_list (1);
6119 /* Return count of locations need to be watched and can be handled
6120 in hardware. If the watchpoint can not be handled
6121 in hardware return zero. */
6124 can_use_hardware_watchpoint (struct value
*v
)
6126 int found_memory_cnt
= 0;
6127 struct value
*head
= v
;
6129 /* Did the user specifically forbid us to use hardware watchpoints? */
6130 if (!can_use_hw_watchpoints
)
6133 /* Make sure that the value of the expression depends only upon
6134 memory contents, and values computed from them within GDB. If we
6135 find any register references or function calls, we can't use a
6136 hardware watchpoint.
6138 The idea here is that evaluating an expression generates a series
6139 of values, one holding the value of every subexpression. (The
6140 expression a*b+c has five subexpressions: a, b, a*b, c, and
6141 a*b+c.) GDB's values hold almost enough information to establish
6142 the criteria given above --- they identify memory lvalues,
6143 register lvalues, computed values, etcetera. So we can evaluate
6144 the expression, and then scan the chain of values that leaves
6145 behind to decide whether we can detect any possible change to the
6146 expression's final value using only hardware watchpoints.
6148 However, I don't think that the values returned by inferior
6149 function calls are special in any way. So this function may not
6150 notice that an expression involving an inferior function call
6151 can't be watched with hardware watchpoints. FIXME. */
6152 for (; v
; v
= value_next (v
))
6154 if (VALUE_LVAL (v
) == lval_memory
)
6157 /* A lazy memory lvalue is one that GDB never needed to fetch;
6158 we either just used its address (e.g., `a' in `a.b') or
6159 we never needed it at all (e.g., `a' in `a,b'). */
6163 /* Ahh, memory we actually used! Check if we can cover
6164 it with hardware watchpoints. */
6165 struct type
*vtype
= check_typedef (value_type (v
));
6167 /* We only watch structs and arrays if user asked for it
6168 explicitly, never if they just happen to appear in a
6169 middle of some value chain. */
6171 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6172 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6174 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
6175 int len
= TYPE_LENGTH (value_type (v
));
6177 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6184 else if (VALUE_LVAL (v
) != not_lval
6185 && deprecated_value_modifiable (v
) == 0)
6186 return 0; /* ??? What does this represent? */
6187 else if (VALUE_LVAL (v
) == lval_register
)
6188 return 0; /* cannot watch a register with a HW watchpoint */
6191 /* The expression itself looks suitable for using a hardware
6192 watchpoint, but give the target machine a chance to reject it. */
6193 return found_memory_cnt
;
6197 watch_command_wrapper (char *arg
, int from_tty
)
6199 watch_command (arg
, from_tty
);
6203 watch_command (char *arg
, int from_tty
)
6205 watch_command_1 (arg
, hw_write
, from_tty
);
6209 rwatch_command_wrapper (char *arg
, int from_tty
)
6211 rwatch_command (arg
, from_tty
);
6215 rwatch_command (char *arg
, int from_tty
)
6217 watch_command_1 (arg
, hw_read
, from_tty
);
6221 awatch_command_wrapper (char *arg
, int from_tty
)
6223 awatch_command (arg
, from_tty
);
6227 awatch_command (char *arg
, int from_tty
)
6229 watch_command_1 (arg
, hw_access
, from_tty
);
6233 /* Helper routines for the until_command routine in infcmd.c. Here
6234 because it uses the mechanisms of breakpoints. */
6236 struct until_break_command_continuation_args
6238 struct breakpoint
*breakpoint
;
6239 struct breakpoint
*breakpoint2
;
6242 /* This function is called by fetch_inferior_event via the
6243 cmd_continuation pointer, to complete the until command. It takes
6244 care of cleaning up the temporary breakpoints set up by the until
6247 until_break_command_continuation (void *arg
)
6249 struct until_break_command_continuation_args
*a
= arg
;
6251 delete_breakpoint (a
->breakpoint
);
6253 delete_breakpoint (a
->breakpoint2
);
6257 until_break_command (char *arg
, int from_tty
, int anywhere
)
6259 struct symtabs_and_lines sals
;
6260 struct symtab_and_line sal
;
6261 struct frame_info
*frame
= get_selected_frame (NULL
);
6262 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6263 struct breakpoint
*breakpoint
;
6264 struct breakpoint
*breakpoint2
= NULL
;
6265 struct cleanup
*old_chain
;
6267 clear_proceed_status ();
6269 /* Set a breakpoint where the user wants it and at return from
6272 if (default_breakpoint_valid
)
6273 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6274 default_breakpoint_line
, (char ***) NULL
, NULL
);
6276 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6277 0, (char ***) NULL
, NULL
);
6279 if (sals
.nelts
!= 1)
6280 error (_("Couldn't get information on specified line."));
6283 xfree (sals
.sals
); /* malloc'd, so freed */
6286 error (_("Junk at end of arguments."));
6288 resolve_sal_pc (&sal
);
6291 /* If the user told us to continue until a specified location,
6292 we don't specify a frame at which we need to stop. */
6293 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6295 /* Otherwise, specify the current frame, because we want to stop only
6296 at the very same frame. */
6297 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6300 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6302 /* Keep within the current frame, or in frames called by the current
6306 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6307 sal
.pc
= get_frame_pc (prev_frame
);
6308 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6310 make_cleanup_delete_breakpoint (breakpoint2
);
6313 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6315 /* If we are running asynchronously, and proceed call above has actually
6316 managed to start the target, arrange for breakpoints to be
6317 deleted when the target stops. Otherwise, we're already stopped and
6318 delete breakpoints via cleanup chain. */
6320 if (target_can_async_p () && is_running (inferior_ptid
))
6322 struct until_break_command_continuation_args
*args
;
6323 args
= xmalloc (sizeof (*args
));
6325 args
->breakpoint
= breakpoint
;
6326 args
->breakpoint2
= breakpoint2
;
6328 discard_cleanups (old_chain
);
6329 add_continuation (inferior_thread (),
6330 until_break_command_continuation
, args
,
6334 do_cleanups (old_chain
);
6338 ep_skip_leading_whitespace (char **s
)
6340 if ((s
== NULL
) || (*s
== NULL
))
6342 while (isspace (**s
))
6346 /* This function attempts to parse an optional "if <cond>" clause
6347 from the arg string. If one is not found, it returns NULL.
6349 Else, it returns a pointer to the condition string. (It does not
6350 attempt to evaluate the string against a particular block.) And,
6351 it updates arg to point to the first character following the parsed
6352 if clause in the arg string. */
6355 ep_parse_optional_if_clause (char **arg
)
6359 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6362 /* Skip the "if" keyword. */
6365 /* Skip any extra leading whitespace, and record the start of the
6366 condition string. */
6367 ep_skip_leading_whitespace (arg
);
6370 /* Assume that the condition occupies the remainder of the arg string. */
6371 (*arg
) += strlen (cond_string
);
6376 /* This function attempts to parse an optional filename from the arg
6377 string. If one is not found, it returns NULL.
6379 Else, it returns a pointer to the parsed filename. (This function
6380 makes no attempt to verify that a file of that name exists, or is
6381 accessible.) And, it updates arg to point to the first character
6382 following the parsed filename in the arg string.
6384 Note that clients needing to preserve the returned filename for
6385 future access should copy it to their own buffers. */
6387 ep_parse_optional_filename (char **arg
)
6389 static char filename
[1024];
6394 if ((*arg_p
== '\0') || isspace (*arg_p
))
6412 /* Commands to deal with catching events, such as signals, exceptions,
6413 process start/exit, etc. */
6417 catch_fork_temporary
, catch_vfork_temporary
,
6418 catch_fork_permanent
, catch_vfork_permanent
6423 catch_fork_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6425 char *cond_string
= NULL
;
6426 catch_fork_kind fork_kind
;
6429 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
6430 tempflag
= (fork_kind
== catch_fork_temporary
6431 || fork_kind
== catch_vfork_temporary
);
6435 ep_skip_leading_whitespace (&arg
);
6437 /* The allowed syntax is:
6439 catch [v]fork if <cond>
6441 First, check if there's an if clause. */
6442 cond_string
= ep_parse_optional_if_clause (&arg
);
6444 if ((*arg
!= '\0') && !isspace (*arg
))
6445 error (_("Junk at end of arguments."));
6447 /* If this target supports it, create a fork or vfork catchpoint
6448 and enable reporting of such events. */
6451 case catch_fork_temporary
:
6452 case catch_fork_permanent
:
6453 create_fork_event_catchpoint (tempflag
, cond_string
);
6455 case catch_vfork_temporary
:
6456 case catch_vfork_permanent
:
6457 create_vfork_event_catchpoint (tempflag
, cond_string
);
6460 error (_("unsupported or unknown fork kind; cannot catch it"));
6466 catch_exec_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6469 char *cond_string
= NULL
;
6471 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6475 ep_skip_leading_whitespace (&arg
);
6477 /* The allowed syntax is:
6479 catch exec if <cond>
6481 First, check if there's an if clause. */
6482 cond_string
= ep_parse_optional_if_clause (&arg
);
6484 if ((*arg
!= '\0') && !isspace (*arg
))
6485 error (_("Junk at end of arguments."));
6487 /* If this target supports it, create an exec catchpoint
6488 and enable reporting of such events. */
6489 create_exec_event_catchpoint (tempflag
, cond_string
);
6493 catch_load_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6496 char *dll_pathname
= NULL
;
6497 char *cond_string
= NULL
;
6499 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6503 ep_skip_leading_whitespace (&arg
);
6505 /* The allowed syntax is:
6507 catch load if <cond>
6508 catch load <filename>
6509 catch load <filename> if <cond>
6511 The user is not allowed to specify the <filename> after an
6514 We'll ignore the pathological case of a file named "if".
6516 First, check if there's an if clause. If so, then there
6517 cannot be a filename. */
6518 cond_string
= ep_parse_optional_if_clause (&arg
);
6520 /* If there was an if clause, then there cannot be a filename.
6521 Else, there might be a filename and an if clause. */
6522 if (cond_string
== NULL
)
6524 dll_pathname
= ep_parse_optional_filename (&arg
);
6525 ep_skip_leading_whitespace (&arg
);
6526 cond_string
= ep_parse_optional_if_clause (&arg
);
6529 if ((*arg
!= '\0') && !isspace (*arg
))
6530 error (_("Junk at end of arguments."));
6532 /* Create a load breakpoint that only triggers when a load of
6533 the specified dll (or any dll, if no pathname was specified)
6535 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6536 dll_pathname
, cond_string
);
6540 catch_unload_command_1 (char *arg
, int from_tty
,
6541 struct cmd_list_element
*command
)
6544 char *dll_pathname
= NULL
;
6545 char *cond_string
= NULL
;
6547 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6551 ep_skip_leading_whitespace (&arg
);
6553 /* The allowed syntax is:
6555 catch unload if <cond>
6556 catch unload <filename>
6557 catch unload <filename> if <cond>
6559 The user is not allowed to specify the <filename> after an
6562 We'll ignore the pathological case of a file named "if".
6564 First, check if there's an if clause. If so, then there
6565 cannot be a filename. */
6566 cond_string
= ep_parse_optional_if_clause (&arg
);
6568 /* If there was an if clause, then there cannot be a filename.
6569 Else, there might be a filename and an if clause. */
6570 if (cond_string
== NULL
)
6572 dll_pathname
= ep_parse_optional_filename (&arg
);
6573 ep_skip_leading_whitespace (&arg
);
6574 cond_string
= ep_parse_optional_if_clause (&arg
);
6577 if ((*arg
!= '\0') && !isspace (*arg
))
6578 error (_("Junk at end of arguments."));
6580 /* Create an unload breakpoint that only triggers when an unload of
6581 the specified dll (or any dll, if no pathname was specified)
6583 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6584 dll_pathname
, cond_string
);
6587 static enum print_stop_action
6588 print_exception_catchpoint (struct breakpoint
*b
)
6590 int bp_temp
, bp_throw
;
6592 annotate_catchpoint (b
->number
);
6594 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6595 if (b
->loc
->address
!= b
->loc
->requested_address
)
6596 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6599 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6601 bp_temp
? "Temporary catchpoint "
6603 if (!ui_out_is_mi_like_p (uiout
))
6604 ui_out_field_int (uiout
, "bkptno", b
->number
);
6606 bp_throw
? " (exception thrown), "
6607 : " (exception caught), ");
6608 if (ui_out_is_mi_like_p (uiout
))
6610 ui_out_field_string (uiout
, "reason",
6611 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6612 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6613 ui_out_field_int (uiout
, "bkptno", b
->number
);
6615 return PRINT_SRC_AND_LOC
;
6619 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6624 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6625 ui_out_field_string (uiout
, "addr", "<PENDING>");
6627 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6631 *last_addr
= b
->loc
->address
;
6632 if (strstr (b
->addr_string
, "throw") != NULL
)
6633 ui_out_field_string (uiout
, "what", "exception throw");
6635 ui_out_field_string (uiout
, "what", "exception catch");
6639 print_mention_exception_catchpoint (struct breakpoint
*b
)
6644 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6645 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6646 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6647 : _("Catchpoint "));
6648 ui_out_field_int (uiout
, "bkptno", b
->number
);
6649 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6653 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6654 print_exception_catchpoint
,
6655 print_one_exception_catchpoint
,
6656 print_mention_exception_catchpoint
6660 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6661 enum exception_event_kind ex_event
, int from_tty
)
6663 char *trigger_func_name
;
6665 if (ex_event
== EX_EVENT_CATCH
)
6666 trigger_func_name
= "__cxa_begin_catch";
6668 trigger_func_name
= "__cxa_throw";
6670 break_command_really (trigger_func_name
, cond_string
, -1,
6671 0 /* condition and thread are valid. */,
6674 AUTO_BOOLEAN_TRUE
/* pending */,
6675 &gnu_v3_exception_catchpoint_ops
, from_tty
);
6680 /* Deal with "catch catch" and "catch throw" commands */
6683 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6684 int tempflag
, int from_tty
)
6686 char *cond_string
= NULL
;
6687 struct symtab_and_line
*sal
= NULL
;
6691 ep_skip_leading_whitespace (&arg
);
6693 cond_string
= ep_parse_optional_if_clause (&arg
);
6695 if ((*arg
!= '\0') && !isspace (*arg
))
6696 error (_("Junk at end of arguments."));
6698 if ((ex_event
!= EX_EVENT_THROW
) &&
6699 (ex_event
!= EX_EVENT_CATCH
))
6700 error (_("Unsupported or unknown exception event; cannot catch it"));
6702 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6705 warning (_("Unsupported with this platform/compiler combination."));
6708 /* Implementation of "catch catch" command. */
6711 catch_catch_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6713 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6714 catch_exception_command_1 (EX_EVENT_CATCH
, arg
, tempflag
, from_tty
);
6717 /* Implementation of "catch throw" command. */
6720 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6722 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6723 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
6726 /* Create a breakpoint struct for Ada exception catchpoints. */
6729 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6733 struct expression
*cond
,
6734 struct breakpoint_ops
*ops
,
6738 struct breakpoint
*b
;
6742 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6743 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6744 version for exception catchpoints, because two catchpoints
6745 used for different exception names will use the same address.
6746 In this case, a "breakpoint ... also set at..." warning is
6747 unproductive. Besides. the warning phrasing is also a bit
6748 inapropriate, we should use the word catchpoint, and tell
6749 the user what type of catchpoint it is. The above is good
6750 enough for now, though. */
6753 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6754 set_breakpoint_count (breakpoint_count
+ 1);
6756 b
->enable_state
= bp_enabled
;
6757 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6758 b
->number
= breakpoint_count
;
6759 b
->ignore_count
= 0;
6760 b
->loc
->cond
= cond
;
6761 b
->addr_string
= addr_string
;
6762 b
->language
= language_ada
;
6763 b
->cond_string
= cond_string
;
6764 b
->exp_string
= exp_string
;
6769 update_global_location_list (1);
6772 /* Implement the "catch exception" command. */
6775 catch_ada_exception_command (char *arg
, int from_tty
,
6776 struct cmd_list_element
*command
)
6779 struct symtab_and_line sal
;
6781 char *addr_string
= NULL
;
6782 char *exp_string
= NULL
;
6783 char *cond_string
= NULL
;
6784 struct expression
*cond
= NULL
;
6785 struct breakpoint_ops
*ops
= NULL
;
6787 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6791 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6792 &cond_string
, &cond
, &ops
);
6793 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6794 cond_string
, cond
, ops
, tempflag
,
6798 /* Implement the "catch assert" command. */
6801 catch_assert_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6804 struct symtab_and_line sal
;
6805 char *addr_string
= NULL
;
6806 struct breakpoint_ops
*ops
= NULL
;
6808 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6812 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6813 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6814 tempflag
, from_tty
);
6818 catch_command (char *arg
, int from_tty
)
6820 error (_("Catch requires an event name."));
6825 tcatch_command (char *arg
, int from_tty
)
6827 error (_("Catch requires an event name."));
6830 /* Delete breakpoints by address or line. */
6833 clear_command (char *arg
, int from_tty
)
6835 struct breakpoint
*b
;
6836 VEC(breakpoint_p
) *found
= 0;
6839 struct symtabs_and_lines sals
;
6840 struct symtab_and_line sal
;
6845 sals
= decode_line_spec (arg
, 1);
6850 sals
.sals
= (struct symtab_and_line
*)
6851 xmalloc (sizeof (struct symtab_and_line
));
6852 make_cleanup (xfree
, sals
.sals
);
6853 init_sal (&sal
); /* initialize to zeroes */
6854 sal
.line
= default_breakpoint_line
;
6855 sal
.symtab
= default_breakpoint_symtab
;
6856 sal
.pc
= default_breakpoint_address
;
6857 if (sal
.symtab
== 0)
6858 error (_("No source file specified."));
6866 /* We don't call resolve_sal_pc here. That's not
6867 as bad as it seems, because all existing breakpoints
6868 typically have both file/line and pc set. So, if
6869 clear is given file/line, we can match this to existing
6870 breakpoint without obtaining pc at all.
6872 We only support clearing given the address explicitly
6873 present in breakpoint table. Say, we've set breakpoint
6874 at file:line. There were several PC values for that file:line,
6875 due to optimization, all in one block.
6876 We've picked one PC value. If "clear" is issued with another
6877 PC corresponding to the same file:line, the breakpoint won't
6878 be cleared. We probably can still clear the breakpoint, but
6879 since the other PC value is never presented to user, user
6880 can only find it by guessing, and it does not seem important
6883 /* For each line spec given, delete bps which correspond
6884 to it. Do it in two passes, solely to preserve the current
6885 behavior that from_tty is forced true if we delete more than
6889 for (i
= 0; i
< sals
.nelts
; i
++)
6891 /* If exact pc given, clear bpts at that pc.
6892 If line given (pc == 0), clear all bpts on specified line.
6893 If defaulting, clear all bpts on default line
6896 defaulting sal.pc != 0 tests to do
6901 1 0 <can't happen> */
6905 /* Find all matching breakpoints and add them to
6910 /* Are we going to delete b? */
6911 if (b
->type
!= bp_none
6912 && b
->type
!= bp_watchpoint
6913 && b
->type
!= bp_hardware_watchpoint
6914 && b
->type
!= bp_read_watchpoint
6915 && b
->type
!= bp_access_watchpoint
)
6917 struct bp_location
*loc
= b
->loc
;
6918 for (; loc
; loc
= loc
->next
)
6920 int pc_match
= sal
.pc
6921 && (loc
->address
== sal
.pc
)
6922 && (!section_is_overlay (loc
->section
)
6923 || loc
->section
== sal
.section
);
6924 int line_match
= ((default_match
|| (0 == sal
.pc
))
6925 && b
->source_file
!= NULL
6926 && sal
.symtab
!= NULL
6927 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6928 && b
->line_number
== sal
.line
);
6929 if (pc_match
|| line_match
)
6938 VEC_safe_push(breakpoint_p
, found
, b
);
6941 /* Now go thru the 'found' chain and delete them. */
6942 if (VEC_empty(breakpoint_p
, found
))
6945 error (_("No breakpoint at %s."), arg
);
6947 error (_("No breakpoint at this line."));
6950 if (VEC_length(breakpoint_p
, found
) > 1)
6951 from_tty
= 1; /* Always report if deleted more than one */
6954 if (VEC_length(breakpoint_p
, found
) == 1)
6955 printf_unfiltered (_("Deleted breakpoint "));
6957 printf_unfiltered (_("Deleted breakpoints "));
6959 breakpoints_changed ();
6961 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6964 printf_unfiltered ("%d ", b
->number
);
6965 delete_breakpoint (b
);
6968 putchar_unfiltered ('\n');
6971 /* Delete breakpoint in BS if they are `delete' breakpoints and
6972 all breakpoints that are marked for deletion, whether hit or not.
6973 This is called after any breakpoint is hit, or after errors. */
6976 breakpoint_auto_delete (bpstat bs
)
6978 struct breakpoint
*b
, *temp
;
6980 for (; bs
; bs
= bs
->next
)
6981 if (bs
->breakpoint_at
6982 && bs
->breakpoint_at
->owner
6983 && bs
->breakpoint_at
->owner
->disposition
== disp_del
6985 delete_breakpoint (bs
->breakpoint_at
->owner
);
6987 ALL_BREAKPOINTS_SAFE (b
, temp
)
6989 if (b
->disposition
== disp_del_at_next_stop
)
6990 delete_breakpoint (b
);
6994 /* If SHOULD_INSERT is true, do not insert any breakpoint locations
6995 into the inferior, only remove already-inserted locations that no
6996 longer should be inserted. Functions that delete a breakpoint or
6997 breakpoints should pass false, so that deleting a breakpoint
6998 doesn't have the side effect of inserting the locations of other
6999 breakpoints that are marked not-inserted, but should_be_inserted
7000 returns true on them.
7002 This behaviour is useful is situations close to tear-down -- e.g.,
7003 after an exec, while the target still has execution, but breakpoint
7004 shadows of the previous executable image should *NOT* be restored
7005 to the new image; or before detaching, where the target still has
7006 execution and wants to delete breakpoints from GDB's lists, and all
7007 breakpoints had already been removed from the inferior. */
7010 update_global_location_list (int should_insert
)
7012 struct breakpoint
*b
;
7013 struct bp_location
**next
= &bp_location_chain
;
7014 struct bp_location
*loc
;
7015 struct bp_location
*loc2
;
7016 struct gdb_exception e
;
7017 VEC(bp_location_p
) *old_locations
= NULL
;
7021 /* Store old locations for future reference. */
7022 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
7023 VEC_safe_push (bp_location_p
, old_locations
, loc
);
7025 bp_location_chain
= NULL
;
7028 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
7031 next
= &(loc
->global_next
);
7036 /* Identify bp_location instances that are no longer present in the new
7037 list, and therefore should be freed. Note that it's not necessary that
7038 those locations should be removed from inferior -- if there's another
7039 location at the same address (previously marked as duplicate),
7040 we don't need to remove/insert the location. */
7041 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
7043 /* Tells if 'loc' is found amoung the new locations. If not, we
7045 int found_object
= 0;
7046 /* Tells if the location should remain inserted in the target. */
7047 int keep_in_target
= 0;
7049 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7056 /* If this location is no longer present, and inserted, look if there's
7057 maybe a new location at the same address. If so, mark that one
7058 inserted, and don't remove this one. This is needed so that we
7059 don't have a time window where a breakpoint at certain location is not
7064 /* If the location is inserted now, we might have to remove it. */
7066 if (found_object
&& should_be_inserted (loc
))
7068 /* The location is still present in the location list, and still
7069 should be inserted. Don't do anything. */
7074 /* The location is either no longer present, or got disabled.
7075 See if there's another location at the same address, in which
7076 case we don't need to remove this one from the target. */
7077 if (breakpoint_address_is_meaningful (loc
->owner
))
7078 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7080 /* For the sake of should_insert_location. The
7081 call to check_duplicates will fix up this later. */
7082 loc2
->duplicate
= 0;
7083 if (should_be_inserted (loc2
)
7084 && loc2
!= loc
&& loc2
->address
== loc
->address
)
7087 loc2
->target_info
= loc
->target_info
;
7094 if (!keep_in_target
)
7096 if (remove_breakpoint (loc
, mark_uninserted
))
7098 /* This is just about all we can do. We could keep this
7099 location on the global list, and try to remove it next
7100 time, but there's no particular reason why we will
7103 Note that at this point, loc->owner is still valid,
7104 as delete_breakpoint frees the breakpoint only
7105 after calling us. */
7106 printf_filtered (_("warning: Error removing breakpoint %d\n"),
7107 loc
->owner
->number
);
7117 /* This location was removed from the targets. In non-stop mode,
7118 a race condition is possible where we've removed a breakpoint,
7119 but stop events for that breakpoint are already queued and will
7120 arrive later. To suppress spurious SIGTRAPs reported to user,
7121 we keep this breakpoint location for a bit, and will retire it
7122 after we see 3 * thread_count events.
7123 The theory here is that reporting of events should,
7124 "on the average", be fair, so after that many event we'll see
7125 events from all threads that have anything of interest, and no
7126 longer need to keep this breakpoint. This is just a
7127 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7128 which is usability issue, but not a correctness problem. */
7129 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7133 free_bp_location (loc
);
7139 check_duplicates (b
);
7142 if (breakpoints_always_inserted_mode ()
7144 && target_has_execution
)
7145 insert_breakpoint_locations ();
7149 breakpoint_retire_moribund (void)
7151 struct bp_location
*loc
;
7154 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7155 if (--(loc
->events_till_retirement
) == 0)
7157 free_bp_location (loc
);
7158 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7164 update_global_location_list_nothrow (int inserting
)
7166 struct gdb_exception e
;
7167 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7168 update_global_location_list (inserting
);
7171 /* Clear BPT from a BPS. */
7173 bpstat_remove_breakpoint (bpstat bps
, struct breakpoint
*bpt
)
7176 for (bs
= bps
; bs
; bs
= bs
->next
)
7177 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7179 bs
->breakpoint_at
= NULL
;
7181 /* bs->commands will be freed later. */
7185 /* Callback for iterate_over_threads. */
7187 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
7189 struct breakpoint
*bpt
= data
;
7190 bpstat_remove_breakpoint (th
->stop_bpstat
, bpt
);
7194 /* Delete a breakpoint and clean up all traces of it in the data
7198 delete_breakpoint (struct breakpoint
*bpt
)
7200 struct breakpoint
*b
;
7201 struct bp_location
*loc
, *next
;
7203 gdb_assert (bpt
!= NULL
);
7205 /* Has this bp already been deleted? This can happen because multiple
7206 lists can hold pointers to bp's. bpstat lists are especial culprits.
7208 One example of this happening is a watchpoint's scope bp. When the
7209 scope bp triggers, we notice that the watchpoint is out of scope, and
7210 delete it. We also delete its scope bp. But the scope bp is marked
7211 "auto-deleting", and is already on a bpstat. That bpstat is then
7212 checked for auto-deleting bp's, which are deleted.
7214 A real solution to this problem might involve reference counts in bp's,
7215 and/or giving them pointers back to their referencing bpstat's, and
7216 teaching delete_breakpoint to only free a bp's storage when no more
7217 references were extent. A cheaper bandaid was chosen. */
7218 if (bpt
->type
== bp_none
)
7221 observer_notify_breakpoint_deleted (bpt
->number
);
7223 if (breakpoint_chain
== bpt
)
7224 breakpoint_chain
= bpt
->next
;
7229 b
->next
= bpt
->next
;
7233 free_command_lines (&bpt
->commands
);
7234 if (bpt
->cond_string
!= NULL
)
7235 xfree (bpt
->cond_string
);
7236 if (bpt
->addr_string
!= NULL
)
7237 xfree (bpt
->addr_string
);
7238 if (bpt
->exp
!= NULL
)
7240 if (bpt
->exp_string
!= NULL
)
7241 xfree (bpt
->exp_string
);
7242 if (bpt
->val
!= NULL
)
7243 value_free (bpt
->val
);
7244 if (bpt
->source_file
!= NULL
)
7245 xfree (bpt
->source_file
);
7246 if (bpt
->dll_pathname
!= NULL
)
7247 xfree (bpt
->dll_pathname
);
7248 if (bpt
->triggered_dll_pathname
!= NULL
)
7249 xfree (bpt
->triggered_dll_pathname
);
7250 if (bpt
->exec_pathname
!= NULL
)
7251 xfree (bpt
->exec_pathname
);
7253 /* Be sure no bpstat's are pointing at it after it's been freed. */
7254 /* FIXME, how can we find all bpstat's?
7255 We just check stop_bpstat for now. Note that we cannot just
7256 remove bpstats pointing at bpt from the stop_bpstat list
7257 entirely, as breakpoint commands are associated with the bpstat;
7258 if we remove it here, then the later call to
7259 bpstat_do_actions (&stop_bpstat);
7260 in event-top.c won't do anything, and temporary breakpoints
7261 with commands won't work. */
7263 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
7265 /* Now that breakpoint is removed from breakpoint
7266 list, update the global location list. This
7267 will remove locations that used to belong to
7268 this breakpoint. Do this before freeing
7269 the breakpoint itself, since remove_breakpoint
7270 looks at location's owner. It might be better
7271 design to have location completely self-contained,
7272 but it's not the case now. */
7273 update_global_location_list (0);
7276 /* On the chance that someone will soon try again to delete this same
7277 bp, we mark it as deleted before freeing its storage. */
7278 bpt
->type
= bp_none
;
7284 do_delete_breakpoint_cleanup (void *b
)
7286 delete_breakpoint (b
);
7290 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7292 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7296 delete_command (char *arg
, int from_tty
)
7298 struct breakpoint
*b
, *temp
;
7304 int breaks_to_delete
= 0;
7306 /* Delete all breakpoints if no argument.
7307 Do not delete internal or call-dummy breakpoints, these
7308 have to be deleted with an explicit breakpoint number argument. */
7311 if (b
->type
!= bp_call_dummy
&&
7312 b
->type
!= bp_shlib_event
&&
7313 b
->type
!= bp_thread_event
&&
7314 b
->type
!= bp_overlay_event
&&
7317 breaks_to_delete
= 1;
7322 /* Ask user only if there are some breakpoints to delete. */
7324 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7326 ALL_BREAKPOINTS_SAFE (b
, temp
)
7328 if (b
->type
!= bp_call_dummy
&&
7329 b
->type
!= bp_shlib_event
&&
7330 b
->type
!= bp_thread_event
&&
7331 b
->type
!= bp_overlay_event
&&
7333 delete_breakpoint (b
);
7338 map_breakpoint_numbers (arg
, delete_breakpoint
);
7342 all_locations_are_pending (struct bp_location
*loc
)
7344 for (; loc
; loc
= loc
->next
)
7345 if (!loc
->shlib_disabled
)
7350 /* Subroutine of update_breakpoint_locations to simplify it.
7351 Return non-zero if multiple fns in list LOC have the same name.
7352 Null names are ignored. */
7355 ambiguous_names_p (struct bp_location
*loc
)
7357 struct bp_location
*l
;
7358 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7359 (int (*) (const void *, const void *)) streq
,
7360 NULL
, xcalloc
, xfree
);
7362 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7365 const char *name
= l
->function_name
;
7367 /* Allow for some names to be NULL, ignore them. */
7371 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7373 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7388 update_breakpoint_locations (struct breakpoint
*b
,
7389 struct symtabs_and_lines sals
)
7393 struct bp_location
*existing_locations
= b
->loc
;
7395 /* If there's no new locations, and all existing locations
7396 are pending, don't do anything. This optimizes
7397 the common case where all locations are in the same
7398 shared library, that was unloaded. We'd like to
7399 retain the location, so that when the library
7400 is loaded again, we don't loose the enabled/disabled
7401 status of the individual locations. */
7402 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7407 for (i
= 0; i
< sals
.nelts
; ++i
)
7409 struct bp_location
*new_loc
=
7410 add_location_to_breakpoint (b
, b
->type
, &(sals
.sals
[i
]));
7412 /* Reparse conditions, they might contain references to the
7414 if (b
->cond_string
!= NULL
)
7416 struct gdb_exception e
;
7419 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7421 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7426 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7427 b
->number
, e
.message
);
7428 new_loc
->enabled
= 0;
7432 if (b
->source_file
!= NULL
)
7433 xfree (b
->source_file
);
7434 if (sals
.sals
[i
].symtab
== NULL
)
7435 b
->source_file
= NULL
;
7438 savestring (sals
.sals
[i
].symtab
->filename
,
7439 strlen (sals
.sals
[i
].symtab
->filename
));
7441 if (b
->line_number
== 0)
7442 b
->line_number
= sals
.sals
[i
].line
;
7445 /* Update locations of permanent breakpoints. */
7446 if (b
->enable_state
== bp_permanent
)
7447 make_breakpoint_permanent (b
);
7449 /* If possible, carry over 'disable' status from existing breakpoints. */
7451 struct bp_location
*e
= existing_locations
;
7452 /* If there are multiple breakpoints with the same function name,
7453 e.g. for inline functions, comparing function names won't work.
7454 Instead compare pc addresses; this is just a heuristic as things
7455 may have moved, but in practice it gives the correct answer
7456 often enough until a better solution is found. */
7457 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7459 for (; e
; e
= e
->next
)
7461 if (!e
->enabled
&& e
->function_name
)
7463 struct bp_location
*l
= b
->loc
;
7464 if (have_ambiguous_names
)
7466 for (; l
; l
= l
->next
)
7467 if (e
->address
== l
->address
)
7475 for (; l
; l
= l
->next
)
7476 if (l
->function_name
7477 && strcmp (e
->function_name
, l
->function_name
) == 0)
7487 update_global_location_list (1);
7491 /* Reset a breakpoint given it's struct breakpoint * BINT.
7492 The value we return ends up being the return value from catch_errors.
7493 Unused in this case. */
7496 breakpoint_re_set_one (void *bint
)
7498 /* get past catch_errs */
7499 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7503 int *not_found_ptr
= ¬_found
;
7504 struct symtabs_and_lines sals
= {};
7505 struct symtabs_and_lines expanded
;
7507 enum enable_state save_enable
;
7508 struct gdb_exception e
;
7514 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7518 case bp_hardware_breakpoint
:
7520 case bp_catch_unload
:
7521 if (b
->addr_string
== NULL
)
7523 /* Anything without a string can't be re-set. */
7524 delete_breakpoint (b
);
7528 set_language (b
->language
);
7529 input_radix
= b
->input_radix
;
7531 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7533 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7538 int not_found_and_ok
= 0;
7539 /* For pending breakpoints, it's expected that parsing
7540 will fail until the right shared library is loaded.
7541 User has already told to create pending breakpoints and
7542 don't need extra messages. If breakpoint is in bp_shlib_disabled
7543 state, then user already saw the message about that breakpoint
7544 being disabled, and don't want to see more errors. */
7546 && (b
->condition_not_parsed
7547 || (b
->loc
&& b
->loc
->shlib_disabled
)
7548 || b
->enable_state
== bp_disabled
))
7549 not_found_and_ok
= 1;
7551 if (!not_found_and_ok
)
7553 /* We surely don't want to warn about the same breakpoint
7554 10 times. One solution, implemented here, is disable
7555 the breakpoint on error. Another solution would be to
7556 have separate 'warning emitted' flag. Since this
7557 happens only when a binary has changed, I don't know
7558 which approach is better. */
7559 b
->enable_state
= bp_disabled
;
7560 throw_exception (e
);
7567 gdb_assert (sals
.nelts
== 1);
7568 resolve_sal_pc (&sals
.sals
[0]);
7569 if (b
->condition_not_parsed
&& s
&& s
[0])
7571 char *cond_string
= 0;
7573 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7574 &cond_string
, &thread
);
7576 b
->cond_string
= cond_string
;
7578 b
->condition_not_parsed
= 0;
7580 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7581 update_breakpoint_locations (b
, expanded
);
7587 case bp_hardware_watchpoint
:
7588 case bp_read_watchpoint
:
7589 case bp_access_watchpoint
:
7590 /* Watchpoint can be either on expression using entirely global variables,
7591 or it can be on local variables.
7593 Watchpoints of the first kind are never auto-deleted, and even persist
7594 across program restarts. Since they can use variables from shared
7595 libraries, we need to reparse expression as libraries are loaded
7598 Watchpoints on local variables can also change meaning as result
7599 of solib event. For example, if a watchpoint uses both a local and
7600 a global variables in expression, it's a local watchpoint, but
7601 unloading of a shared library will make the expression invalid.
7602 This is not a very common use case, but we still re-evaluate
7603 expression, to avoid surprises to the user.
7605 Note that for local watchpoints, we re-evaluate it only if
7606 watchpoints frame id is still valid. If it's not, it means
7607 the watchpoint is out of scope and will be deleted soon. In fact,
7608 I'm not sure we'll ever be called in this case.
7610 If a local watchpoint's frame id is still valid, then
7611 b->exp_valid_block is likewise valid, and we can safely use it.
7613 Don't do anything about disabled watchpoints, since they will
7614 be reevaluated again when enabled. */
7615 update_watchpoint (b
, 1 /* reparse */);
7617 /* We needn't really do anything to reset these, since the mask
7618 that requests them is unaffected by e.g., new libraries being
7621 case bp_catch_vfork
:
7626 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7628 /* Delete overlay event breakpoints; they will be reset later by
7629 breakpoint_re_set. */
7630 case bp_overlay_event
:
7631 delete_breakpoint (b
);
7634 /* This breakpoint is special, it's set up when the inferior
7635 starts and we really don't want to touch it. */
7636 case bp_shlib_event
:
7638 /* Like bp_shlib_event, this breakpoint type is special.
7639 Once it is set up, we do not want to touch it. */
7640 case bp_thread_event
:
7642 /* Keep temporary breakpoints, which can be encountered when we step
7643 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7644 Otherwise these should have been blown away via the cleanup chain
7645 or by breakpoint_init_inferior when we rerun the executable. */
7648 case bp_watchpoint_scope
:
7650 case bp_step_resume
:
7652 case bp_longjmp_resume
:
7659 /* Re-set all breakpoints after symbols have been re-loaded. */
7661 breakpoint_re_set (void)
7663 struct breakpoint
*b
, *temp
;
7664 enum language save_language
;
7665 int save_input_radix
;
7667 save_language
= current_language
->la_language
;
7668 save_input_radix
= input_radix
;
7669 ALL_BREAKPOINTS_SAFE (b
, temp
)
7671 /* Format possible error msg */
7672 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7674 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7675 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7676 do_cleanups (cleanups
);
7678 set_language (save_language
);
7679 input_radix
= save_input_radix
;
7681 create_overlay_event_breakpoint ("_ovly_debug_event");
7684 /* Reset the thread number of this breakpoint:
7686 - If the breakpoint is for all threads, leave it as-is.
7687 - Else, reset it to the current thread for inferior_ptid. */
7689 breakpoint_re_set_thread (struct breakpoint
*b
)
7691 if (b
->thread
!= -1)
7693 if (in_thread_list (inferior_ptid
))
7694 b
->thread
= pid_to_thread_id (inferior_ptid
);
7698 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7699 If from_tty is nonzero, it prints a message to that effect,
7700 which ends with a period (no newline). */
7703 set_ignore_count (int bptnum
, int count
, int from_tty
)
7705 struct breakpoint
*b
;
7711 if (b
->number
== bptnum
)
7713 b
->ignore_count
= count
;
7717 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7719 else if (count
== 1)
7720 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7723 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7726 breakpoints_changed ();
7727 observer_notify_breakpoint_modified (b
->number
);
7731 error (_("No breakpoint number %d."), bptnum
);
7734 /* Clear the ignore counts of all breakpoints. */
7736 breakpoint_clear_ignore_counts (void)
7738 struct breakpoint
*b
;
7741 b
->ignore_count
= 0;
7744 /* Command to set ignore-count of breakpoint N to COUNT. */
7747 ignore_command (char *args
, int from_tty
)
7753 error_no_arg (_("a breakpoint number"));
7755 num
= get_number (&p
);
7757 error (_("bad breakpoint number: '%s'"), args
);
7759 error (_("Second argument (specified ignore-count) is missing."));
7761 set_ignore_count (num
,
7762 longest_to_int (value_as_long (parse_and_eval (p
))),
7765 printf_filtered ("\n");
7768 /* Call FUNCTION on each of the breakpoints
7769 whose numbers are given in ARGS. */
7772 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7777 struct breakpoint
*b
, *tmp
;
7781 error_no_arg (_("one or more breakpoint numbers"));
7788 num
= get_number_or_range (&p1
);
7791 warning (_("bad breakpoint number at or near '%s'"), p
);
7795 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7796 if (b
->number
== num
)
7798 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7801 if (related_breakpoint
)
7802 function (related_breakpoint
);
7806 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7812 static struct bp_location
*
7813 find_location_by_number (char *number
)
7815 char *dot
= strchr (number
, '.');
7819 struct breakpoint
*b
;
7820 struct bp_location
*loc
;
7825 bp_num
= get_number_or_range (&p1
);
7827 error (_("Bad breakpoint number '%s'"), number
);
7830 if (b
->number
== bp_num
)
7835 if (!b
|| b
->number
!= bp_num
)
7836 error (_("Bad breakpoint number '%s'"), number
);
7839 loc_num
= get_number_or_range (&p1
);
7841 error (_("Bad breakpoint location number '%s'"), number
);
7845 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7848 error (_("Bad breakpoint location number '%s'"), dot
+1);
7854 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7855 If from_tty is nonzero, it prints a message to that effect,
7856 which ends with a period (no newline). */
7859 disable_breakpoint (struct breakpoint
*bpt
)
7861 /* Never disable a watchpoint scope breakpoint; we want to
7862 hit them when we leave scope so we can delete both the
7863 watchpoint and its scope breakpoint at that time. */
7864 if (bpt
->type
== bp_watchpoint_scope
)
7867 /* You can't disable permanent breakpoints. */
7868 if (bpt
->enable_state
== bp_permanent
)
7871 bpt
->enable_state
= bp_disabled
;
7873 update_global_location_list (0);
7875 observer_notify_breakpoint_modified (bpt
->number
);
7879 disable_command (char *args
, int from_tty
)
7881 struct breakpoint
*bpt
;
7883 ALL_BREAKPOINTS (bpt
)
7887 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7892 case bp_catch_unload
:
7894 case bp_catch_vfork
:
7896 case bp_hardware_breakpoint
:
7898 case bp_hardware_watchpoint
:
7899 case bp_read_watchpoint
:
7900 case bp_access_watchpoint
:
7901 disable_breakpoint (bpt
);
7905 else if (strchr (args
, '.'))
7907 struct bp_location
*loc
= find_location_by_number (args
);
7910 update_global_location_list (0);
7913 map_breakpoint_numbers (args
, disable_breakpoint
);
7917 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7919 int target_resources_ok
, other_type_used
;
7922 if (bpt
->type
== bp_hardware_breakpoint
)
7925 i
= hw_breakpoint_used_count ();
7926 target_resources_ok
=
7927 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7929 if (target_resources_ok
== 0)
7930 error (_("No hardware breakpoint support in the target."));
7931 else if (target_resources_ok
< 0)
7932 error (_("Hardware breakpoints used exceeds limit."));
7935 if (bpt
->type
== bp_watchpoint
||
7936 bpt
->type
== bp_hardware_watchpoint
||
7937 bpt
->type
== bp_read_watchpoint
||
7938 bpt
->type
== bp_access_watchpoint
)
7940 struct frame_id saved_frame_id
;
7942 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7943 if (bpt
->exp_valid_block
!= NULL
)
7945 struct frame_info
*fr
=
7946 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7949 printf_filtered (_("\
7950 Cannot enable watchpoint %d because the block in which its expression\n\
7951 is valid is not currently in scope.\n"), bpt
->number
);
7958 value_free (bpt
->val
);
7959 mark
= value_mark ();
7960 fetch_watchpoint_value (bpt
->exp
, &bpt
->val
, NULL
, NULL
);
7962 release_value (bpt
->val
);
7965 if (bpt
->type
== bp_hardware_watchpoint
||
7966 bpt
->type
== bp_read_watchpoint
||
7967 bpt
->type
== bp_access_watchpoint
)
7969 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7970 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7972 /* Hack around 'unused var' error for some targets here */
7973 (void) mem_cnt
, (void) i
;
7974 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7975 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7976 /* we can consider of type is bp_hardware_watchpoint, convert to
7977 bp_watchpoint in the following condition */
7978 if (target_resources_ok
< 0)
7980 printf_filtered (_("\
7981 Cannot enable watchpoint %d because target watch resources\n\
7982 have been allocated for other watchpoints.\n"), bpt
->number
);
7983 value_free_to_mark (mark
);
7988 select_frame (frame_find_by_id (saved_frame_id
));
7989 value_free_to_mark (mark
);
7992 if (bpt
->enable_state
!= bp_permanent
)
7993 bpt
->enable_state
= bp_enabled
;
7994 bpt
->disposition
= disposition
;
7995 update_global_location_list (1);
7996 breakpoints_changed ();
7998 observer_notify_breakpoint_modified (bpt
->number
);
8003 enable_breakpoint (struct breakpoint
*bpt
)
8005 do_enable_breakpoint (bpt
, bpt
->disposition
);
8008 /* The enable command enables the specified breakpoints (or all defined
8009 breakpoints) so they once again become (or continue to be) effective
8010 in stopping the inferior. */
8013 enable_command (char *args
, int from_tty
)
8015 struct breakpoint
*bpt
;
8017 ALL_BREAKPOINTS (bpt
)
8021 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
8026 case bp_catch_unload
:
8028 case bp_catch_vfork
:
8030 case bp_hardware_breakpoint
:
8032 case bp_hardware_watchpoint
:
8033 case bp_read_watchpoint
:
8034 case bp_access_watchpoint
:
8035 enable_breakpoint (bpt
);
8039 else if (strchr (args
, '.'))
8041 struct bp_location
*loc
= find_location_by_number (args
);
8044 update_global_location_list (1);
8047 map_breakpoint_numbers (args
, enable_breakpoint
);
8051 enable_once_breakpoint (struct breakpoint
*bpt
)
8053 do_enable_breakpoint (bpt
, disp_disable
);
8057 enable_once_command (char *args
, int from_tty
)
8059 map_breakpoint_numbers (args
, enable_once_breakpoint
);
8063 enable_delete_breakpoint (struct breakpoint
*bpt
)
8065 do_enable_breakpoint (bpt
, disp_del
);
8069 enable_delete_command (char *args
, int from_tty
)
8071 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
8075 set_breakpoint_cmd (char *args
, int from_tty
)
8080 show_breakpoint_cmd (char *args
, int from_tty
)
8084 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
8086 struct symtabs_and_lines
8087 decode_line_spec_1 (char *string
, int funfirstline
)
8089 struct symtabs_and_lines sals
;
8091 error (_("Empty line specification."));
8092 if (default_breakpoint_valid
)
8093 sals
= decode_line_1 (&string
, funfirstline
,
8094 default_breakpoint_symtab
,
8095 default_breakpoint_line
,
8096 (char ***) NULL
, NULL
);
8098 sals
= decode_line_1 (&string
, funfirstline
,
8099 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
8101 error (_("Junk at end of line specification: %s"), string
);
8105 /* Create and insert a raw software breakpoint at PC. Return an
8106 identifier, which should be used to remove the breakpoint later.
8107 In general, places which call this should be using something on the
8108 breakpoint chain instead; this function should be eliminated
8112 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
8114 struct bp_target_info
*bp_tgt
;
8116 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
8117 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
8119 bp_tgt
->placed_address
= pc
;
8120 if (target_insert_breakpoint (bp_tgt
) != 0)
8122 /* Could not insert the breakpoint. */
8130 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
8133 deprecated_remove_raw_breakpoint (void *bp
)
8135 struct bp_target_info
*bp_tgt
= bp
;
8138 ret
= target_remove_breakpoint (bp_tgt
);
8144 /* One (or perhaps two) breakpoints used for software single stepping. */
8146 static void *single_step_breakpoints
[2];
8148 /* Create and insert a breakpoint for software single step. */
8151 insert_single_step_breakpoint (CORE_ADDR next_pc
)
8155 if (single_step_breakpoints
[0] == NULL
)
8156 bpt_p
= &single_step_breakpoints
[0];
8159 gdb_assert (single_step_breakpoints
[1] == NULL
);
8160 bpt_p
= &single_step_breakpoints
[1];
8163 /* NOTE drow/2006-04-11: A future improvement to this function would be
8164 to only create the breakpoints once, and actually put them on the
8165 breakpoint chain. That would let us use set_raw_breakpoint. We could
8166 adjust the addresses each time they were needed. Doing this requires
8167 corresponding changes elsewhere where single step breakpoints are
8168 handled, however. So, for now, we use this. */
8170 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
8172 error (_("Could not insert single-step breakpoint at 0x%s"),
8173 paddr_nz (next_pc
));
8176 /* Remove and delete any breakpoints used for software single step. */
8179 remove_single_step_breakpoints (void)
8181 gdb_assert (single_step_breakpoints
[0] != NULL
);
8183 /* See insert_single_step_breakpoint for more about this deprecated
8185 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8186 single_step_breakpoints
[0] = NULL
;
8188 if (single_step_breakpoints
[1] != NULL
)
8190 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8191 single_step_breakpoints
[1] = NULL
;
8195 /* Check whether a software single-step breakpoint is inserted at PC. */
8198 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8202 for (i
= 0; i
< 2; i
++)
8204 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8205 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8213 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8214 It is defined as a macro to prevent duplication.
8215 COMMAND should be a string constant containing the name of the command. */
8216 #define BREAK_ARGS_HELP(command) \
8217 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8218 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8219 If a line number is specified, break at start of code for that line.\n\
8220 If a function is specified, break at start of code for that function.\n\
8221 If an address is specified, break at that exact address.\n\
8222 With no LOCATION, uses current execution address of selected stack frame.\n\
8223 This is useful for breaking on return to a stack frame.\n\
8225 THREADNUM is the number from \"info threads\".\n\
8226 CONDITION is a boolean expression.\n\
8228 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8230 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8232 /* List of subcommands for "catch". */
8233 static struct cmd_list_element
*catch_cmdlist
;
8235 /* List of subcommands for "tcatch". */
8236 static struct cmd_list_element
*tcatch_cmdlist
;
8238 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
8239 lists, and pass some additional user data to the command function. */
8241 add_catch_command (char *name
, char *docstring
,
8242 void (*sfunc
) (char *args
, int from_tty
,
8243 struct cmd_list_element
*command
),
8244 void *user_data_catch
,
8245 void *user_data_tcatch
)
8247 struct cmd_list_element
*command
;
8249 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8251 set_cmd_sfunc (command
, sfunc
);
8252 set_cmd_context (command
, user_data_catch
);
8254 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8256 set_cmd_sfunc (command
, sfunc
);
8257 set_cmd_context (command
, user_data_tcatch
);
8261 _initialize_breakpoint (void)
8263 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8264 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8265 struct cmd_list_element
*c
;
8267 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8269 breakpoint_chain
= 0;
8270 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8271 before a breakpoint is set. */
8272 breakpoint_count
= 0;
8274 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8275 Set ignore-count of breakpoint number N to COUNT.\n\
8276 Usage is `ignore N COUNT'."));
8278 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8280 add_com ("commands", class_breakpoint
, commands_command
, _("\
8281 Set commands to be executed when a breakpoint is hit.\n\
8282 Give breakpoint number as argument after \"commands\".\n\
8283 With no argument, the targeted breakpoint is the last one set.\n\
8284 The commands themselves follow starting on the next line.\n\
8285 Type a line containing \"end\" to indicate the end of them.\n\
8286 Give \"silent\" as the first line to make the breakpoint silent;\n\
8287 then no output is printed when it is hit, except what the commands print."));
8289 add_com ("condition", class_breakpoint
, condition_command
, _("\
8290 Specify breakpoint number N to break only if COND is true.\n\
8291 Usage is `condition N COND', where N is an integer and COND is an\n\
8292 expression to be evaluated whenever breakpoint N is reached."));
8294 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8295 Set a temporary breakpoint.\n\
8296 Like \"break\" except the breakpoint is only temporary,\n\
8297 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8298 by using \"enable delete\" on the breakpoint number.\n\
8300 BREAK_ARGS_HELP ("tbreak")));
8301 set_cmd_completer (c
, location_completer
);
8303 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8304 Set a hardware assisted breakpoint.\n\
8305 Like \"break\" except the breakpoint requires hardware support,\n\
8306 some target hardware may not have this support.\n\
8308 BREAK_ARGS_HELP ("hbreak")));
8309 set_cmd_completer (c
, location_completer
);
8311 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8312 Set a temporary hardware assisted breakpoint.\n\
8313 Like \"hbreak\" except the breakpoint is only temporary,\n\
8314 so it will be deleted when hit.\n\
8316 BREAK_ARGS_HELP ("thbreak")));
8317 set_cmd_completer (c
, location_completer
);
8319 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8320 Enable some breakpoints.\n\
8321 Give breakpoint numbers (separated by spaces) as arguments.\n\
8322 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8323 This is used to cancel the effect of the \"disable\" command.\n\
8324 With a subcommand you can enable temporarily."),
8325 &enablelist
, "enable ", 1, &cmdlist
);
8327 add_com ("ab", class_breakpoint
, enable_command
, _("\
8328 Enable some breakpoints.\n\
8329 Give breakpoint numbers (separated by spaces) as arguments.\n\
8330 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8331 This is used to cancel the effect of the \"disable\" command.\n\
8332 With a subcommand you can enable temporarily."));
8334 add_com_alias ("en", "enable", class_breakpoint
, 1);
8336 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8337 Enable some breakpoints.\n\
8338 Give breakpoint numbers (separated by spaces) as arguments.\n\
8339 This is used to cancel the effect of the \"disable\" command.\n\
8340 May be abbreviated to simply \"enable\".\n"),
8341 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8343 add_cmd ("once", no_class
, enable_once_command
, _("\
8344 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8345 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8348 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8349 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8350 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8353 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8354 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8355 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8358 add_cmd ("once", no_class
, enable_once_command
, _("\
8359 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8360 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8363 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8364 Disable some breakpoints.\n\
8365 Arguments are breakpoint numbers with spaces in between.\n\
8366 To disable all breakpoints, give no argument.\n\
8367 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8368 &disablelist
, "disable ", 1, &cmdlist
);
8369 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8370 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8372 add_com ("sb", class_breakpoint
, disable_command
, _("\
8373 Disable some breakpoints.\n\
8374 Arguments are breakpoint numbers with spaces in between.\n\
8375 To disable all breakpoints, give no argument.\n\
8376 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8378 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8379 Disable some breakpoints.\n\
8380 Arguments are breakpoint numbers with spaces in between.\n\
8381 To disable all breakpoints, give no argument.\n\
8382 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8383 This command may be abbreviated \"disable\"."),
8386 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8387 Delete some breakpoints or auto-display expressions.\n\
8388 Arguments are breakpoint numbers with spaces in between.\n\
8389 To delete all breakpoints, give no argument.\n\
8391 Also a prefix command for deletion of other GDB objects.\n\
8392 The \"unset\" command is also an alias for \"delete\"."),
8393 &deletelist
, "delete ", 1, &cmdlist
);
8394 add_com_alias ("d", "delete", class_breakpoint
, 1);
8395 add_com_alias ("del", "delete", class_breakpoint
, 1);
8397 add_com ("db", class_breakpoint
, delete_command
, _("\
8398 Delete some breakpoints.\n\
8399 Arguments are breakpoint numbers with spaces in between.\n\
8400 To delete all breakpoints, give no argument.\n"));
8402 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8403 Delete some breakpoints or auto-display expressions.\n\
8404 Arguments are breakpoint numbers with spaces in between.\n\
8405 To delete all breakpoints, give no argument.\n\
8406 This command may be abbreviated \"delete\"."),
8409 add_com ("clear", class_breakpoint
, clear_command
, _("\
8410 Clear breakpoint at specified line or function.\n\
8411 Argument may be line number, function name, or \"*\" and an address.\n\
8412 If line number is specified, all breakpoints in that line are cleared.\n\
8413 If function is specified, breakpoints at beginning of function are cleared.\n\
8414 If an address is specified, breakpoints at that address are cleared.\n\
8416 With no argument, clears all breakpoints in the line that the selected frame\n\
8419 See also the \"delete\" command which clears breakpoints by number."));
8421 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8422 Set breakpoint at specified line or function.\n"
8423 BREAK_ARGS_HELP ("break")));
8424 set_cmd_completer (c
, location_completer
);
8426 add_com_alias ("b", "break", class_run
, 1);
8427 add_com_alias ("br", "break", class_run
, 1);
8428 add_com_alias ("bre", "break", class_run
, 1);
8429 add_com_alias ("brea", "break", class_run
, 1);
8433 add_com_alias ("ba", "break", class_breakpoint
, 1);
8434 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8439 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8440 Break in function/address or break at a line in the current file."),
8441 &stoplist
, "stop ", 1, &cmdlist
);
8442 add_cmd ("in", class_breakpoint
, stopin_command
,
8443 _("Break in function or address."), &stoplist
);
8444 add_cmd ("at", class_breakpoint
, stopat_command
,
8445 _("Break at a line in the current file."), &stoplist
);
8446 add_com ("status", class_info
, breakpoints_info
, _("\
8447 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8448 The \"Type\" column indicates one of:\n\
8449 \tbreakpoint - normal breakpoint\n\
8450 \twatchpoint - watchpoint\n\
8451 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8452 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8453 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8454 address and file/line number respectively.\n\
8456 Convenience variable \"$_\" and default examine address for \"x\"\n\
8457 are set to the address of the last breakpoint listed unless the command\n\
8458 is prefixed with \"server \".\n\n\
8459 Convenience variable \"$bpnum\" contains the number of the last\n\
8463 add_info ("breakpoints", breakpoints_info
, _("\
8464 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8465 The \"Type\" column indicates one of:\n\
8466 \tbreakpoint - normal breakpoint\n\
8467 \twatchpoint - watchpoint\n\
8468 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8469 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8470 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8471 address and file/line number respectively.\n\
8473 Convenience variable \"$_\" and default examine address for \"x\"\n\
8474 are set to the address of the last breakpoint listed unless the command\n\
8475 is prefixed with \"server \".\n\n\
8476 Convenience variable \"$bpnum\" contains the number of the last\n\
8480 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8481 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8482 The \"Type\" column indicates one of:\n\
8483 \tbreakpoint - normal breakpoint\n\
8484 \twatchpoint - watchpoint\n\
8485 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8486 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8487 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8488 address and file/line number respectively.\n\
8490 Convenience variable \"$_\" and default examine address for \"x\"\n\
8491 are set to the address of the last breakpoint listed unless the command\n\
8492 is prefixed with \"server \".\n\n\
8493 Convenience variable \"$bpnum\" contains the number of the last\n\
8496 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8497 Status of all breakpoints, or breakpoint number NUMBER.\n\
8498 The \"Type\" column indicates one of:\n\
8499 \tbreakpoint - normal breakpoint\n\
8500 \twatchpoint - watchpoint\n\
8501 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8502 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8503 \tuntil - internal breakpoint used by the \"until\" command\n\
8504 \tfinish - internal breakpoint used by the \"finish\" command\n\
8505 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8506 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8507 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8508 address and file/line number respectively.\n\
8510 Convenience variable \"$_\" and default examine address for \"x\"\n\
8511 are set to the address of the last breakpoint listed unless the command\n\
8512 is prefixed with \"server \".\n\n\
8513 Convenience variable \"$bpnum\" contains the number of the last\n\
8515 &maintenanceinfolist
);
8517 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
8518 Set catchpoints to catch events."),
8519 &catch_cmdlist
, "catch ",
8520 0/*allow-unknown*/, &cmdlist
);
8522 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
8523 Set temporary catchpoints to catch events."),
8524 &tcatch_cmdlist
, "tcatch ",
8525 0/*allow-unknown*/, &cmdlist
);
8527 /* Add catch and tcatch sub-commands. */
8528 add_catch_command ("catch", _("\
8529 Catch an exception, when caught.\n\
8530 With an argument, catch only exceptions with the given name."),
8531 catch_catch_command
,
8534 add_catch_command ("throw", _("\
8535 Catch an exception, when thrown.\n\
8536 With an argument, catch only exceptions with the given name."),
8537 catch_throw_command
,
8540 add_catch_command ("fork", _("Catch calls to fork."),
8541 catch_fork_command_1
,
8542 (void *) (uintptr_t) catch_fork_permanent
,
8543 (void *) (uintptr_t) catch_fork_temporary
);
8544 add_catch_command ("vfork", _("Catch calls to vfork."),
8545 catch_fork_command_1
,
8546 (void *) (uintptr_t) catch_vfork_permanent
,
8547 (void *) (uintptr_t) catch_vfork_temporary
);
8548 add_catch_command ("exec", _("Catch calls to exec."),
8549 catch_exec_command_1
,
8552 add_catch_command ("load", _("\
8553 Catch library loads.\n\
8554 With an argument, catch only loads of that library."),
8555 catch_load_command_1
,
8558 add_catch_command ("unload", _("\
8559 Catch library unloads.\n\
8560 With an argument, catch only unloads of that library."),
8561 catch_unload_command_1
,
8564 add_catch_command ("exception", _("\
8565 Catch Ada exceptions, when raised.\n\
8566 With an argument, catch only exceptions with the given name."),
8567 catch_ada_exception_command
,
8570 add_catch_command ("assert", _("\
8571 Catch failed Ada assertions, when raised.\n\
8572 With an argument, catch only exceptions with the given name."),
8573 catch_assert_command
,
8577 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8578 Set a watchpoint for an expression.\n\
8579 A watchpoint stops execution of your program whenever the value of\n\
8580 an expression changes."));
8581 set_cmd_completer (c
, expression_completer
);
8583 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8584 Set a read watchpoint for an expression.\n\
8585 A watchpoint stops execution of your program whenever the value of\n\
8586 an expression is read."));
8587 set_cmd_completer (c
, expression_completer
);
8589 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8590 Set a watchpoint for an expression.\n\
8591 A watchpoint stops execution of your program whenever the value of\n\
8592 an expression is either read or written."));
8593 set_cmd_completer (c
, expression_completer
);
8595 add_info ("watchpoints", breakpoints_info
,
8596 _("Synonym for ``info breakpoints''."));
8599 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8600 respond to changes - contrary to the description. */
8601 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8602 &can_use_hw_watchpoints
, _("\
8603 Set debugger's willingness to use watchpoint hardware."), _("\
8604 Show debugger's willingness to use watchpoint hardware."), _("\
8605 If zero, gdb will not use hardware for new watchpoints, even if\n\
8606 such is available. (However, any hardware watchpoints that were\n\
8607 created before setting this to nonzero, will continue to use watchpoint\n\
8610 show_can_use_hw_watchpoints
,
8611 &setlist
, &showlist
);
8613 can_use_hw_watchpoints
= 1;
8615 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8616 Breakpoint specific settings\n\
8617 Configure various breakpoint-specific variables such as\n\
8618 pending breakpoint behavior"),
8619 &breakpoint_set_cmdlist
, "set breakpoint ",
8620 0/*allow-unknown*/, &setlist
);
8621 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8622 Breakpoint specific settings\n\
8623 Configure various breakpoint-specific variables such as\n\
8624 pending breakpoint behavior"),
8625 &breakpoint_show_cmdlist
, "show breakpoint ",
8626 0/*allow-unknown*/, &showlist
);
8628 add_setshow_auto_boolean_cmd ("pending", no_class
,
8629 &pending_break_support
, _("\
8630 Set debugger's behavior regarding pending breakpoints."), _("\
8631 Show debugger's behavior regarding pending breakpoints."), _("\
8632 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8633 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8634 an error. If auto, an unrecognized breakpoint location results in a\n\
8635 user-query to see if a pending breakpoint should be created."),
8637 show_pending_break_support
,
8638 &breakpoint_set_cmdlist
,
8639 &breakpoint_show_cmdlist
);
8641 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8643 add_setshow_boolean_cmd ("auto-hw", no_class
,
8644 &automatic_hardware_breakpoints
, _("\
8645 Set automatic usage of hardware breakpoints."), _("\
8646 Show automatic usage of hardware breakpoints."), _("\
8647 If set, the debugger will automatically use hardware breakpoints for\n\
8648 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8649 a warning will be emitted for such breakpoints."),
8651 show_automatic_hardware_breakpoints
,
8652 &breakpoint_set_cmdlist
,
8653 &breakpoint_show_cmdlist
);
8655 add_setshow_enum_cmd ("always-inserted", class_support
,
8656 always_inserted_enums
, &always_inserted_mode
, _("\
8657 Set mode for inserting breakpoints."), _("\
8658 Show mode for inserting breakpoints."), _("\
8659 When this mode is off, breakpoints are inserted in inferior when it is\n\
8660 resumed, and removed when execution stops. When this mode is on,\n\
8661 breakpoints are inserted immediately and removed only when the user\n\
8662 deletes the breakpoint. When this mode is auto (which is the default),\n\
8663 the behaviour depends on the non-stop setting (see help set non-stop).\n\
8664 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
8665 behaves as if always-inserted mode is on; if gdb is controlling the\n\
8666 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
8668 &show_always_inserted_mode
,
8669 &breakpoint_set_cmdlist
,
8670 &breakpoint_show_cmdlist
);
8672 automatic_hardware_breakpoints
= 1;