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_int
, (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. */
2144 bpstat_do_actions (bpstat
*bsp
)
2147 struct cleanup
*old_chain
;
2149 /* Avoid endless recursion if a `source' command is contained
2151 if (executing_breakpoint_commands
)
2154 executing_breakpoint_commands
= 1;
2155 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2158 /* Note that (as of this writing), our callers all appear to
2159 be passing us the address of global stop_bpstat. And, if
2160 our calls to execute_control_command cause the inferior to
2161 proceed, that global (and hence, *bsp) will change.
2163 We must be careful to not touch *bsp unless the inferior
2164 has not proceeded. */
2166 /* This pointer will iterate over the list of bpstat's. */
2169 breakpoint_proceeded
= 0;
2170 for (; bs
!= NULL
; bs
= bs
->next
)
2172 struct command_line
*cmd
;
2173 struct cleanup
*this_cmd_tree_chain
;
2175 /* Take ownership of the BSP's command tree, if it has one.
2177 The command tree could legitimately contain commands like
2178 'step' and 'next', which call clear_proceed_status, which
2179 frees stop_bpstat's command tree. To make sure this doesn't
2180 free the tree we're executing out from under us, we need to
2181 take ownership of the tree ourselves. Since a given bpstat's
2182 commands are only executed once, we don't need to copy it; we
2183 can clear the pointer in the bpstat, and make sure we free
2184 the tree when we're done. */
2187 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2191 execute_control_command (cmd
);
2193 if (breakpoint_proceeded
)
2199 /* We can free this command tree now. */
2200 do_cleanups (this_cmd_tree_chain
);
2202 if (breakpoint_proceeded
)
2204 if (target_can_async_p ())
2205 /* If we are in async mode, then the target might
2206 be still running, not stopped at any breakpoint,
2207 so nothing for us to do here -- just return to
2211 /* In sync mode, when execute_control_command returns
2212 we're already standing on the next breakpoint.
2213 Breakpoint commands for that stop were not run,
2214 since execute_command does not run breakpoint
2215 commands -- only command_line_handler does, but
2216 that one is not involved in execution of breakpoint
2217 commands. So, we can now execute breakpoint commands.
2218 There's an implicit assumption that we're called with
2219 stop_bpstat, so our parameter is the new bpstat to
2221 It should be noted that making execute_command do
2222 bpstat actions is not an option -- in this case we'll
2223 have recursive invocation of bpstat for each breakpoint
2224 with a command, and can easily blow up GDB stack. */
2228 do_cleanups (old_chain
);
2231 /* Print out the (old or new) value associated with a watchpoint. */
2234 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2237 fprintf_unfiltered (stream
, _("<unreadable>"));
2239 value_print (val
, stream
, 0, Val_pretty_default
);
2242 /* This is the normal print function for a bpstat. In the future,
2243 much of this logic could (should?) be moved to bpstat_stop_status,
2244 by having it set different print_it values.
2246 Current scheme: When we stop, bpstat_print() is called. It loops
2247 through the bpstat list of things causing this stop, calling the
2248 print_bp_stop_message function on each one. The behavior of the
2249 print_bp_stop_message function depends on the print_it field of
2250 bpstat. If such field so indicates, call this function here.
2252 Return values from this routine (ultimately used by bpstat_print()
2253 and normal_stop() to decide what to do):
2254 PRINT_NOTHING: Means we already printed all we needed to print,
2255 don't print anything else.
2256 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2257 that something to be followed by a location.
2258 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2259 that something to be followed by a location.
2260 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2263 static enum print_stop_action
2264 print_it_typical (bpstat bs
)
2266 struct cleanup
*old_chain
, *ui_out_chain
;
2267 struct breakpoint
*b
;
2268 const struct bp_location
*bl
;
2269 struct ui_stream
*stb
;
2271 stb
= ui_out_stream_new (uiout
);
2272 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2273 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2274 which has since been deleted. */
2275 if (bs
->breakpoint_at
== NULL
)
2276 return PRINT_UNKNOWN
;
2277 bl
= bs
->breakpoint_at
;
2283 case bp_hardware_breakpoint
:
2284 bp_temp
= bs
->breakpoint_at
->owner
->disposition
== disp_del
;
2285 if (bl
->address
!= bl
->requested_address
)
2286 breakpoint_adjustment_warning (bl
->requested_address
,
2289 annotate_breakpoint (b
->number
);
2291 ui_out_text (uiout
, "\nTemporary breakpoint ");
2293 ui_out_text (uiout
, "\nBreakpoint ");
2294 if (ui_out_is_mi_like_p (uiout
))
2296 ui_out_field_string (uiout
, "reason",
2297 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2298 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
2300 ui_out_field_int (uiout
, "bkptno", b
->number
);
2301 ui_out_text (uiout
, ", ");
2302 return PRINT_SRC_AND_LOC
;
2305 case bp_shlib_event
:
2306 /* Did we stop because the user set the stop_on_solib_events
2307 variable? (If so, we report this as a generic, "Stopped due
2308 to shlib event" message.) */
2309 printf_filtered (_("Stopped due to shared library event\n"));
2310 return PRINT_NOTHING
;
2313 case bp_thread_event
:
2314 /* Not sure how we will get here.
2315 GDB should not stop for these breakpoints. */
2316 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2317 return PRINT_NOTHING
;
2320 case bp_overlay_event
:
2321 /* By analogy with the thread event, GDB should not stop for these. */
2322 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2323 return PRINT_NOTHING
;
2327 annotate_catchpoint (b
->number
);
2328 printf_filtered (_("\nCatchpoint %d (loaded %s), "),
2330 b
->triggered_dll_pathname
);
2331 return PRINT_SRC_AND_LOC
;
2334 case bp_catch_unload
:
2335 annotate_catchpoint (b
->number
);
2336 printf_filtered (_("\nCatchpoint %d (unloaded %s), "),
2338 b
->triggered_dll_pathname
);
2339 return PRINT_SRC_AND_LOC
;
2343 annotate_catchpoint (b
->number
);
2344 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
2346 ptid_get_pid (b
->forked_inferior_pid
));
2347 return PRINT_SRC_AND_LOC
;
2350 case bp_catch_vfork
:
2351 annotate_catchpoint (b
->number
);
2352 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
2354 ptid_get_pid (b
->forked_inferior_pid
));
2355 return PRINT_SRC_AND_LOC
;
2359 annotate_catchpoint (b
->number
);
2360 printf_filtered (_("\nCatchpoint %d (exec'd %s), "),
2363 return PRINT_SRC_AND_LOC
;
2367 case bp_hardware_watchpoint
:
2368 annotate_watchpoint (b
->number
);
2369 if (ui_out_is_mi_like_p (uiout
))
2372 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2374 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2375 ui_out_text (uiout
, "\nOld value = ");
2376 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2377 ui_out_field_stream (uiout
, "old", stb
);
2378 ui_out_text (uiout
, "\nNew value = ");
2379 watchpoint_value_print (b
->val
, stb
->stream
);
2380 ui_out_field_stream (uiout
, "new", stb
);
2381 do_cleanups (ui_out_chain
);
2382 ui_out_text (uiout
, "\n");
2383 /* More than one watchpoint may have been triggered. */
2384 return PRINT_UNKNOWN
;
2387 case bp_read_watchpoint
:
2388 if (ui_out_is_mi_like_p (uiout
))
2391 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2393 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2394 ui_out_text (uiout
, "\nValue = ");
2395 watchpoint_value_print (b
->val
, stb
->stream
);
2396 ui_out_field_stream (uiout
, "value", stb
);
2397 do_cleanups (ui_out_chain
);
2398 ui_out_text (uiout
, "\n");
2399 return PRINT_UNKNOWN
;
2402 case bp_access_watchpoint
:
2403 if (bs
->old_val
!= NULL
)
2405 annotate_watchpoint (b
->number
);
2406 if (ui_out_is_mi_like_p (uiout
))
2409 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2411 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2412 ui_out_text (uiout
, "\nOld value = ");
2413 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2414 ui_out_field_stream (uiout
, "old", stb
);
2415 ui_out_text (uiout
, "\nNew value = ");
2420 if (ui_out_is_mi_like_p (uiout
))
2423 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2424 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2425 ui_out_text (uiout
, "\nValue = ");
2427 watchpoint_value_print (b
->val
, stb
->stream
);
2428 ui_out_field_stream (uiout
, "new", stb
);
2429 do_cleanups (ui_out_chain
);
2430 ui_out_text (uiout
, "\n");
2431 return PRINT_UNKNOWN
;
2434 /* Fall through, we don't deal with these types of breakpoints
2438 if (ui_out_is_mi_like_p (uiout
))
2441 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2442 return PRINT_UNKNOWN
;
2446 if (ui_out_is_mi_like_p (uiout
))
2449 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2450 return PRINT_UNKNOWN
;
2455 case bp_longjmp_resume
:
2456 case bp_step_resume
:
2457 case bp_watchpoint_scope
:
2460 return PRINT_UNKNOWN
;
2464 /* Generic routine for printing messages indicating why we
2465 stopped. The behavior of this function depends on the value
2466 'print_it' in the bpstat structure. Under some circumstances we
2467 may decide not to print anything here and delegate the task to
2470 static enum print_stop_action
2471 print_bp_stop_message (bpstat bs
)
2473 switch (bs
->print_it
)
2476 /* Nothing should be printed for this bpstat entry. */
2477 return PRINT_UNKNOWN
;
2481 /* We still want to print the frame, but we already printed the
2482 relevant messages. */
2483 return PRINT_SRC_AND_LOC
;
2486 case print_it_normal
:
2488 const struct bp_location
*bl
= bs
->breakpoint_at
;
2489 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2491 /* Normal case. Call the breakpoint's print_it method, or
2492 print_it_typical. */
2493 /* FIXME: how breakpoint can ever be NULL here? */
2494 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2495 return b
->ops
->print_it (b
);
2497 return print_it_typical (bs
);
2502 internal_error (__FILE__
, __LINE__
,
2503 _("print_bp_stop_message: unrecognized enum value"));
2508 /* Print a message indicating what happened. This is called from
2509 normal_stop(). The input to this routine is the head of the bpstat
2510 list - a list of the eventpoints that caused this stop. This
2511 routine calls the generic print routine for printing a message
2512 about reasons for stopping. This will print (for example) the
2513 "Breakpoint n," part of the output. The return value of this
2516 PRINT_UNKNOWN: Means we printed nothing
2517 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2518 code to print the location. An example is
2519 "Breakpoint 1, " which should be followed by
2521 PRINT_SRC_ONLY: Means we printed something, but there is no need
2522 to also print the location part of the message.
2523 An example is the catch/throw messages, which
2524 don't require a location appended to the end.
2525 PRINT_NOTHING: We have done some printing and we don't need any
2526 further info to be printed.*/
2528 enum print_stop_action
2529 bpstat_print (bpstat bs
)
2533 /* Maybe another breakpoint in the chain caused us to stop.
2534 (Currently all watchpoints go on the bpstat whether hit or not.
2535 That probably could (should) be changed, provided care is taken
2536 with respect to bpstat_explains_signal). */
2537 for (; bs
; bs
= bs
->next
)
2539 val
= print_bp_stop_message (bs
);
2540 if (val
== PRINT_SRC_ONLY
2541 || val
== PRINT_SRC_AND_LOC
2542 || val
== PRINT_NOTHING
)
2546 /* We reached the end of the chain, or we got a null BS to start
2547 with and nothing was printed. */
2548 return PRINT_UNKNOWN
;
2551 /* Evaluate the expression EXP and return 1 if value is zero.
2552 This is used inside a catch_errors to evaluate the breakpoint condition.
2553 The argument is a "struct expression *" that has been cast to char * to
2554 make it pass through catch_errors. */
2557 breakpoint_cond_eval (void *exp
)
2559 struct value
*mark
= value_mark ();
2560 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2561 value_free_to_mark (mark
);
2565 /* Allocate a new bpstat and chain it to the current one. */
2568 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2572 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2574 bs
->breakpoint_at
= bl
;
2575 /* If the condition is false, etc., don't do the commands. */
2576 bs
->commands
= NULL
;
2578 bs
->print_it
= print_it_normal
;
2582 /* The target has stopped with waitstatus WS. Check if any hardware
2583 watchpoints have triggered, according to the target. */
2586 watchpoints_triggered (struct target_waitstatus
*ws
)
2588 int stopped_by_watchpoint
= STOPPED_BY_WATCHPOINT (*ws
);
2590 struct breakpoint
*b
;
2592 if (!stopped_by_watchpoint
)
2594 /* We were not stopped by a watchpoint. Mark all watchpoints
2595 as not triggered. */
2597 if (b
->type
== bp_hardware_watchpoint
2598 || b
->type
== bp_read_watchpoint
2599 || b
->type
== bp_access_watchpoint
)
2600 b
->watchpoint_triggered
= watch_triggered_no
;
2605 if (!target_stopped_data_address (¤t_target
, &addr
))
2607 /* We were stopped by a watchpoint, but we don't know where.
2608 Mark all watchpoints as unknown. */
2610 if (b
->type
== bp_hardware_watchpoint
2611 || b
->type
== bp_read_watchpoint
2612 || b
->type
== bp_access_watchpoint
)
2613 b
->watchpoint_triggered
= watch_triggered_unknown
;
2615 return stopped_by_watchpoint
;
2618 /* The target could report the data address. Mark watchpoints
2619 affected by this data address as triggered, and all others as not
2623 if (b
->type
== bp_hardware_watchpoint
2624 || b
->type
== bp_read_watchpoint
2625 || b
->type
== bp_access_watchpoint
)
2627 struct bp_location
*loc
;
2630 b
->watchpoint_triggered
= watch_triggered_no
;
2631 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2632 /* Exact match not required. Within range is
2634 if (target_watchpoint_addr_within_range (¤t_target
,
2638 b
->watchpoint_triggered
= watch_triggered_yes
;
2646 /* Possible return values for watchpoint_check (this can't be an enum
2647 because of check_errors). */
2648 /* The watchpoint has been deleted. */
2649 #define WP_DELETED 1
2650 /* The value has changed. */
2651 #define WP_VALUE_CHANGED 2
2652 /* The value has not changed. */
2653 #define WP_VALUE_NOT_CHANGED 3
2655 #define BP_TEMPFLAG 1
2656 #define BP_HARDWAREFLAG 2
2658 /* Check watchpoint condition. */
2661 watchpoint_check (void *p
)
2663 bpstat bs
= (bpstat
) p
;
2664 struct breakpoint
*b
;
2665 struct frame_info
*fr
;
2666 int within_current_scope
;
2668 b
= bs
->breakpoint_at
->owner
;
2670 if (b
->exp_valid_block
== NULL
)
2671 within_current_scope
= 1;
2674 /* There is no current frame at this moment. If we're going to have
2675 any chance of handling watchpoints on local variables, we'll need
2676 the frame chain (so we can determine if we're in scope). */
2677 reinit_frame_cache ();
2678 fr
= frame_find_by_id (b
->watchpoint_frame
);
2679 within_current_scope
= (fr
!= NULL
);
2681 /* If we've gotten confused in the unwinder, we might have
2682 returned a frame that can't describe this variable. */
2683 if (within_current_scope
2684 && (block_linkage_function (b
->exp_valid_block
)
2685 != get_frame_function (fr
)))
2686 within_current_scope
= 0;
2688 /* in_function_epilogue_p() returns a non-zero value if we're still
2689 in the function but the stack frame has already been invalidated.
2690 Since we can't rely on the values of local variables after the
2691 stack has been destroyed, we are treating the watchpoint in that
2692 state as `not changed' without further checking.
2694 vinschen/2003-09-04: The former implementation left out the case
2695 that the watchpoint frame couldn't be found by frame_find_by_id()
2696 because the current PC is currently in an epilogue. Calling
2697 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2698 if ((!within_current_scope
|| fr
== get_current_frame ())
2699 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2700 return WP_VALUE_NOT_CHANGED
;
2701 if (fr
&& within_current_scope
)
2702 /* If we end up stopping, the current frame will get selected
2703 in normal_stop. So this call to select_frame won't affect
2708 if (within_current_scope
)
2710 /* We use value_{,free_to_}mark because it could be a
2711 *long* time before we return to the command level and
2712 call free_all_values. We can't call free_all_values because
2713 we might be in the middle of evaluating a function call. */
2715 struct value
*mark
= value_mark ();
2716 struct value
*new_val
;
2718 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2719 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2720 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2722 if (new_val
!= NULL
)
2724 release_value (new_val
);
2725 value_free_to_mark (mark
);
2727 bs
->old_val
= b
->val
;
2730 /* We will stop here */
2731 return WP_VALUE_CHANGED
;
2735 /* Nothing changed, don't do anything. */
2736 value_free_to_mark (mark
);
2737 /* We won't stop here */
2738 return WP_VALUE_NOT_CHANGED
;
2743 /* This seems like the only logical thing to do because
2744 if we temporarily ignored the watchpoint, then when
2745 we reenter the block in which it is valid it contains
2746 garbage (in the case of a function, it may have two
2747 garbage values, one before and one after the prologue).
2748 So we can't even detect the first assignment to it and
2749 watch after that (since the garbage may or may not equal
2750 the first value assigned). */
2751 /* We print all the stop information in print_it_typical(), but
2752 in this case, by the time we call print_it_typical() this bp
2753 will be deleted already. So we have no choice but print the
2754 information here. */
2755 if (ui_out_is_mi_like_p (uiout
))
2757 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2758 ui_out_text (uiout
, "\nWatchpoint ");
2759 ui_out_field_int (uiout
, "wpnum", b
->number
);
2760 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2761 which its expression is valid.\n");
2763 if (b
->related_breakpoint
)
2764 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2765 b
->disposition
= disp_del_at_next_stop
;
2771 /* Return true if it looks like target has stopped due to hitting
2772 breakpoint location BL. This function does not check if we
2773 should stop, only if BL explains the stop. */
2775 bpstat_check_location (const struct bp_location
*bl
, CORE_ADDR bp_addr
)
2777 struct breakpoint
*b
= bl
->owner
;
2779 if (b
->type
!= bp_watchpoint
2780 && b
->type
!= bp_hardware_watchpoint
2781 && b
->type
!= bp_read_watchpoint
2782 && b
->type
!= bp_access_watchpoint
2783 && b
->type
!= bp_hardware_breakpoint
2784 && b
->type
!= bp_catch_fork
2785 && b
->type
!= bp_catch_vfork
2786 && b
->type
!= bp_catch_exec
) /* a non-watchpoint bp */
2788 if (bl
->address
!= bp_addr
) /* address doesn't match */
2790 if (overlay_debugging
/* unmapped overlay section */
2791 && section_is_overlay (bl
->section
)
2792 && !section_is_mapped (bl
->section
))
2796 /* Continuable hardware watchpoints are treated as non-existent if the
2797 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2798 some data address). Otherwise gdb won't stop on a break instruction
2799 in the code (not from a breakpoint) when a hardware watchpoint has
2800 been defined. Also skip watchpoints which we know did not trigger
2801 (did not match the data address). */
2803 if ((b
->type
== bp_hardware_watchpoint
2804 || b
->type
== bp_read_watchpoint
2805 || b
->type
== bp_access_watchpoint
)
2806 && b
->watchpoint_triggered
== watch_triggered_no
)
2809 if (b
->type
== bp_hardware_breakpoint
)
2811 if (bl
->address
!= bp_addr
)
2813 if (overlay_debugging
/* unmapped overlay section */
2814 && section_is_overlay (bl
->section
)
2815 && !section_is_mapped (bl
->section
))
2819 /* Is this a catchpoint of a load or unload? If so, did we
2820 get a load or unload of the specified library? If not,
2822 if ((b
->type
== bp_catch_load
)
2823 #if defined(SOLIB_HAVE_LOAD_EVENT)
2824 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2825 || ((b
->dll_pathname
!= NULL
)
2826 && (strcmp (b
->dll_pathname
,
2827 SOLIB_LOADED_LIBRARY_PATHNAME (
2828 PIDGET (inferior_ptid
)))
2834 if ((b
->type
== bp_catch_unload
)
2835 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2836 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2837 || ((b
->dll_pathname
!= NULL
)
2838 && (strcmp (b
->dll_pathname
,
2839 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2840 PIDGET (inferior_ptid
)))
2846 if ((b
->type
== bp_catch_fork
)
2847 && !inferior_has_forked (inferior_ptid
,
2848 &b
->forked_inferior_pid
))
2851 if ((b
->type
== bp_catch_vfork
)
2852 && !inferior_has_vforked (inferior_ptid
,
2853 &b
->forked_inferior_pid
))
2856 if ((b
->type
== bp_catch_exec
)
2857 && !inferior_has_execd (inferior_ptid
, &b
->exec_pathname
))
2863 /* If BS refers to a watchpoint, determine if the watched values
2864 has actually changed, and we should stop. If not, set BS->stop
2867 bpstat_check_watchpoint (bpstat bs
)
2869 const struct bp_location
*bl
= bs
->breakpoint_at
;
2870 struct breakpoint
*b
= bl
->owner
;
2872 if (b
->type
== bp_watchpoint
2873 || b
->type
== bp_read_watchpoint
2874 || b
->type
== bp_access_watchpoint
2875 || b
->type
== bp_hardware_watchpoint
)
2879 int must_check_value
= 0;
2881 if (b
->type
== bp_watchpoint
)
2882 /* For a software watchpoint, we must always check the
2884 must_check_value
= 1;
2885 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2886 /* We have a hardware watchpoint (read, write, or access)
2887 and the target earlier reported an address watched by
2889 must_check_value
= 1;
2890 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2891 && b
->type
== bp_hardware_watchpoint
)
2892 /* We were stopped by a hardware watchpoint, but the target could
2893 not report the data address. We must check the watchpoint's
2894 value. Access and read watchpoints are out of luck; without
2895 a data address, we can't figure it out. */
2896 must_check_value
= 1;
2898 if (must_check_value
)
2900 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2902 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2903 int e
= catch_errors (watchpoint_check
, bs
, message
,
2905 do_cleanups (cleanups
);
2909 /* We've already printed what needs to be printed. */
2910 bs
->print_it
= print_it_done
;
2913 case WP_VALUE_CHANGED
:
2914 if (b
->type
== bp_read_watchpoint
)
2916 /* Don't stop: read watchpoints shouldn't fire if
2917 the value has changed. This is for targets
2918 which cannot set read-only watchpoints. */
2919 bs
->print_it
= print_it_noop
;
2923 case WP_VALUE_NOT_CHANGED
:
2924 if (b
->type
== bp_hardware_watchpoint
2925 || b
->type
== bp_watchpoint
)
2927 /* Don't stop: write watchpoints shouldn't fire if
2928 the value hasn't changed. */
2929 bs
->print_it
= print_it_noop
;
2937 /* Error from catch_errors. */
2938 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2939 if (b
->related_breakpoint
)
2940 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2941 b
->disposition
= disp_del_at_next_stop
;
2942 /* We've already printed what needs to be printed. */
2943 bs
->print_it
= print_it_done
;
2947 else /* must_check_value == 0 */
2949 /* This is a case where some watchpoint(s) triggered, but
2950 not at the address of this watchpoint, or else no
2951 watchpoint triggered after all. So don't print
2952 anything for this watchpoint. */
2953 bs
->print_it
= print_it_noop
;
2960 /* Check conditions (condition proper, frame, thread and ignore count)
2961 of breakpoint referred to by BS. If we should not stop for this
2962 breakpoint, set BS->stop to 0. */
2964 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
2966 int thread_id
= pid_to_thread_id (ptid
);
2967 const struct bp_location
*bl
= bs
->breakpoint_at
;
2968 struct breakpoint
*b
= bl
->owner
;
2970 if (frame_id_p (b
->frame_id
)
2971 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2975 int value_is_zero
= 0;
2977 /* If this is a scope breakpoint, mark the associated
2978 watchpoint as triggered so that we will handle the
2979 out-of-scope event. We'll get to the watchpoint next
2981 if (b
->type
== bp_watchpoint_scope
)
2982 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
2984 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
2986 /* Need to select the frame, with all that implies
2987 so that the conditions will have the right context. */
2988 select_frame (get_current_frame ());
2990 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
2991 "Error in testing breakpoint condition:\n",
2993 /* FIXME-someday, should give breakpoint # */
2996 if (bl
->cond
&& value_is_zero
)
3000 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
3004 else if (b
->ignore_count
> 0)
3007 annotate_ignore_count_change ();
3009 /* Increase the hit count even though we don't
3017 /* Get a bpstat associated with having just stopped at address
3018 BP_ADDR in thread PTID.
3020 Determine whether we stopped at a breakpoint, etc, or whether we
3021 don't understand this stop. Result is a chain of bpstat's such that:
3023 if we don't understand the stop, the result is a null pointer.
3025 if we understand why we stopped, the result is not null.
3027 Each element of the chain refers to a particular breakpoint or
3028 watchpoint at which we have stopped. (We may have stopped for
3029 several reasons concurrently.)
3031 Each element of the chain has valid next, breakpoint_at,
3032 commands, FIXME??? fields. */
3035 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
3037 struct breakpoint
*b
= NULL
;
3038 const struct bp_location
*bl
;
3039 struct bp_location
*loc
;
3040 /* Root of the chain of bpstat's */
3041 struct bpstats root_bs
[1];
3042 /* Pointer to the last thing in the chain currently. */
3043 bpstat bs
= root_bs
;
3046 ALL_BP_LOCATIONS (bl
)
3050 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
3053 /* For hardware watchpoints, we look only at the first location.
3054 The watchpoint_check function will work on entire expression,
3055 not the individual locations. For read watchopints, the
3056 watchpoints_triggered function have checked all locations
3059 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
3062 if (!bpstat_check_location (bl
, bp_addr
))
3065 /* Come here if it's a watchpoint, or if the break address matches */
3067 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
3069 /* Assume we stop. Should we find watchpoint that is not actually
3070 triggered, or if condition of breakpoint is false, we'll reset
3075 bpstat_check_watchpoint (bs
);
3079 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
3080 /* We do not stop for these. */
3083 bpstat_check_breakpoint_conditions (bs
, ptid
);
3089 /* We will stop here */
3090 if (b
->disposition
== disp_disable
)
3092 if (b
->enable_state
!= bp_permanent
)
3093 b
->enable_state
= bp_disabled
;
3094 update_global_location_list (0);
3098 bs
->commands
= b
->commands
;
3100 (strcmp ("silent", bs
->commands
->line
) == 0
3101 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3103 bs
->commands
= bs
->commands
->next
;
3106 bs
->commands
= copy_command_lines (bs
->commands
);
3109 /* Print nothing for this entry if we dont stop or if we dont print. */
3110 if (bs
->stop
== 0 || bs
->print
== 0)
3111 bs
->print_it
= print_it_noop
;
3114 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
3116 if (loc
->address
== bp_addr
)
3118 bs
= bpstat_alloc (loc
, bs
);
3119 /* For hits of moribund locations, we should just proceed. */
3122 bs
->print_it
= print_it_noop
;
3126 bs
->next
= NULL
; /* Terminate the chain */
3127 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3129 /* If we aren't stopping, the value of some hardware watchpoint may
3130 not have changed, but the intermediate memory locations we are
3131 watching may have. Don't bother if we're stopping; this will get
3133 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3138 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3140 && bs
->breakpoint_at
->owner
3141 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3142 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3143 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3145 /* remove/insert can invalidate bs->breakpoint_at, if this
3146 location is no longer used by the watchpoint. Prevent
3147 further code from trying to use it. */
3148 bs
->breakpoint_at
= NULL
;
3149 remove_breakpoints ();
3150 insert_breakpoints ();
3154 return root_bs
->next
;
3157 /* Tell what to do about this bpstat. */
3159 bpstat_what (bpstat bs
)
3161 /* Classify each bpstat as one of the following. */
3164 /* This bpstat element has no effect on the main_action. */
3167 /* There was a watchpoint, stop but don't print. */
3170 /* There was a watchpoint, stop and print. */
3173 /* There was a breakpoint but we're not stopping. */
3176 /* There was a breakpoint, stop but don't print. */
3179 /* There was a breakpoint, stop and print. */
3182 /* We hit the longjmp breakpoint. */
3185 /* We hit the longjmp_resume breakpoint. */
3188 /* We hit the step_resume breakpoint. */
3191 /* We hit the shared library event breakpoint. */
3194 /* We caught a shared library event. */
3197 /* This is just used to count how many enums there are. */
3201 /* Here is the table which drives this routine. So that we can
3202 format it pretty, we define some abbreviations for the
3203 enum bpstat_what codes. */
3204 #define kc BPSTAT_WHAT_KEEP_CHECKING
3205 #define ss BPSTAT_WHAT_STOP_SILENT
3206 #define sn BPSTAT_WHAT_STOP_NOISY
3207 #define sgl BPSTAT_WHAT_SINGLE
3208 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3209 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3210 #define sr BPSTAT_WHAT_STEP_RESUME
3211 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3212 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
3214 /* "Can't happen." Might want to print an error message.
3215 abort() is not out of the question, but chances are GDB is just
3216 a bit confused, not unusable. */
3217 #define err BPSTAT_WHAT_STOP_NOISY
3219 /* Given an old action and a class, come up with a new action. */
3220 /* One interesting property of this table is that wp_silent is the same
3221 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3222 after stopping, the check for whether to step over a breakpoint
3223 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3224 reference to how we stopped. We retain separate wp_silent and
3225 bp_silent codes in case we want to change that someday.
3227 Another possibly interesting property of this table is that
3228 there's a partial ordering, priority-like, of the actions. Once
3229 you've decided that some action is appropriate, you'll never go
3230 back and decide something of a lower priority is better. The
3233 kc < clr sgl shl shlr slr sn sr ss
3234 sgl < shl shlr slr sn sr ss
3235 slr < err shl shlr sn sr ss
3236 clr < err shl shlr sn sr ss
3243 What I think this means is that we don't need a damned table
3244 here. If you just put the rows and columns in the right order,
3245 it'd look awfully regular. We could simply walk the bpstat list
3246 and choose the highest priority action we find, with a little
3247 logic to handle the 'err' cases. */
3249 /* step_resume entries: a step resume breakpoint overrides another
3250 breakpoint of signal handling (see comment in wait_for_inferior
3251 at where we set the step_resume breakpoint). */
3253 static const enum bpstat_what_main_action
3254 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3257 /* kc ss sn sgl slr clr sr shl shlr
3260 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
, shlr
},
3262 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
, shlr
},
3264 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3266 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
, shlr
},
3268 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
, shlr
},
3270 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3272 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
, shlr
},
3274 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
, shlr
},
3276 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3278 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
, shlr
},
3280 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, sr
, shlr
, shlr
}
3294 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3295 struct bpstat_what retval
;
3297 retval
.call_dummy
= 0;
3298 for (; bs
!= NULL
; bs
= bs
->next
)
3300 enum class bs_class
= no_effect
;
3301 if (bs
->breakpoint_at
== NULL
)
3302 /* I suspect this can happen if it was a momentary breakpoint
3303 which has since been deleted. */
3305 if (bs
->breakpoint_at
->owner
== NULL
)
3306 bs_class
= bp_nostop
;
3308 switch (bs
->breakpoint_at
->owner
->type
)
3314 case bp_hardware_breakpoint
:
3320 bs_class
= bp_noisy
;
3322 bs_class
= bp_silent
;
3325 bs_class
= bp_nostop
;
3328 case bp_hardware_watchpoint
:
3329 case bp_read_watchpoint
:
3330 case bp_access_watchpoint
:
3334 bs_class
= wp_noisy
;
3336 bs_class
= wp_silent
;
3339 /* There was a watchpoint, but we're not stopping.
3340 This requires no further action. */
3341 bs_class
= no_effect
;
3344 bs_class
= long_jump
;
3346 case bp_longjmp_resume
:
3347 bs_class
= long_resume
;
3349 case bp_step_resume
:
3352 bs_class
= step_resume
;
3355 /* It is for the wrong frame. */
3356 bs_class
= bp_nostop
;
3358 case bp_watchpoint_scope
:
3359 bs_class
= bp_nostop
;
3361 case bp_shlib_event
:
3362 bs_class
= shlib_event
;
3364 case bp_thread_event
:
3365 case bp_overlay_event
:
3366 bs_class
= bp_nostop
;
3369 case bp_catch_unload
:
3370 /* Only if this catchpoint triggered should we cause the
3371 step-out-of-dld behaviour. Otherwise, we ignore this
3374 bs_class
= catch_shlib_event
;
3376 bs_class
= no_effect
;
3379 case bp_catch_vfork
:
3384 bs_class
= bp_noisy
;
3386 bs_class
= bp_silent
;
3389 /* There was a catchpoint, but we're not stopping.
3390 This requires no further action. */
3391 bs_class
= no_effect
;
3394 /* Make sure the action is stop (silent or noisy),
3395 so infrun.c pops the dummy frame. */
3396 bs_class
= bp_silent
;
3397 retval
.call_dummy
= 1;
3400 current_action
= table
[(int) bs_class
][(int) current_action
];
3402 retval
.main_action
= current_action
;
3406 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3407 without hardware support). This isn't related to a specific bpstat,
3408 just to things like whether watchpoints are set. */
3411 bpstat_should_step (void)
3413 struct breakpoint
*b
;
3415 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3422 /* Given a bpstat that records zero or more triggered eventpoints, this
3423 function returns another bpstat which contains only the catchpoints
3424 on that first list, if any. */
3426 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3428 struct bpstats root_bs
[1];
3429 bpstat bs
= root_bs
;
3430 struct breakpoint
*ep
;
3433 bpstat_clear (cp_list
);
3434 root_bs
->next
= NULL
;
3436 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3438 /* Is this eventpoint a catchpoint? If not, ignore it. */
3439 ep
= ep_list
->breakpoint_at
->owner
;
3442 if ((ep
->type
!= bp_catch_load
) &&
3443 (ep
->type
!= bp_catch_unload
))
3444 /* pai: (temp) ADD fork/vfork here!! */
3447 /* Yes; add it to the list. */
3448 bs
= bpstat_alloc (ep_list
->breakpoint_at
, bs
);
3453 #if defined(SOLIB_ADD)
3454 /* Also, for each triggered catchpoint, tag it with the name of
3455 the library that caused this trigger. (We copy the name now,
3456 because it's only guaranteed to be available NOW, when the
3457 catchpoint triggers. Clients who may wish to know the name
3458 later must get it from the catchpoint itself.) */
3459 if (ep
->triggered_dll_pathname
!= NULL
)
3460 xfree (ep
->triggered_dll_pathname
);
3461 if (ep
->type
== bp_catch_load
)
3462 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3463 PIDGET (inferior_ptid
));
3465 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3466 PIDGET (inferior_ptid
));
3468 dll_pathname
= NULL
;
3472 ep
->triggered_dll_pathname
= (char *)
3473 xmalloc (strlen (dll_pathname
) + 1);
3474 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3477 ep
->triggered_dll_pathname
= NULL
;
3483 static void print_breakpoint_location (struct breakpoint
*b
,
3484 struct bp_location
*loc
,
3486 struct ui_stream
*stb
)
3491 = find_pc_sect_function (loc
->address
, loc
->section
);
3494 ui_out_text (uiout
, "in ");
3495 ui_out_field_string (uiout
, "func",
3496 SYMBOL_PRINT_NAME (sym
));
3497 ui_out_wrap_hint (uiout
, wrap_indent
);
3498 ui_out_text (uiout
, " at ");
3500 ui_out_field_string (uiout
, "file", b
->source_file
);
3501 ui_out_text (uiout
, ":");
3503 if (ui_out_is_mi_like_p (uiout
))
3505 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3506 char *fullname
= symtab_to_fullname (sal
.symtab
);
3509 ui_out_field_string (uiout
, "fullname", fullname
);
3512 ui_out_field_int (uiout
, "line", b
->line_number
);
3516 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3520 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3521 ui_out_field_stream (uiout
, "at", stb
);
3525 /* Print B to gdb_stdout. */
3527 print_one_breakpoint_location (struct breakpoint
*b
,
3528 struct bp_location
*loc
,
3530 CORE_ADDR
*last_addr
)
3532 struct command_line
*l
;
3534 struct ep_type_description
3539 static struct ep_type_description bptypes
[] =
3541 {bp_none
, "?deleted?"},
3542 {bp_breakpoint
, "breakpoint"},
3543 {bp_hardware_breakpoint
, "hw breakpoint"},
3544 {bp_until
, "until"},
3545 {bp_finish
, "finish"},
3546 {bp_watchpoint
, "watchpoint"},
3547 {bp_hardware_watchpoint
, "hw watchpoint"},
3548 {bp_read_watchpoint
, "read watchpoint"},
3549 {bp_access_watchpoint
, "acc watchpoint"},
3550 {bp_longjmp
, "longjmp"},
3551 {bp_longjmp_resume
, "longjmp resume"},
3552 {bp_step_resume
, "step resume"},
3553 {bp_watchpoint_scope
, "watchpoint scope"},
3554 {bp_call_dummy
, "call dummy"},
3555 {bp_shlib_event
, "shlib events"},
3556 {bp_thread_event
, "thread events"},
3557 {bp_overlay_event
, "overlay events"},
3558 {bp_catch_load
, "catch load"},
3559 {bp_catch_unload
, "catch unload"},
3560 {bp_catch_fork
, "catch fork"},
3561 {bp_catch_vfork
, "catch vfork"},
3562 {bp_catch_exec
, "catch exec"}
3565 static char bpenables
[] = "nynny";
3566 char wrap_indent
[80];
3567 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3568 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3569 struct cleanup
*bkpt_chain
;
3571 int header_of_multiple
= 0;
3572 int part_of_multiple
= (loc
!= NULL
);
3574 gdb_assert (!loc
|| loc_number
!= 0);
3575 /* See comment in print_one_breakpoint concerning
3576 treatment of breakpoints with single disabled
3580 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3581 header_of_multiple
= 1;
3586 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3590 if (part_of_multiple
)
3593 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3594 ui_out_field_string (uiout
, "number", formatted
);
3599 ui_out_field_int (uiout
, "number", b
->number
);
3604 if (part_of_multiple
)
3605 ui_out_field_skip (uiout
, "type");
3608 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3609 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3610 internal_error (__FILE__
, __LINE__
,
3611 _("bptypes table does not describe type #%d."),
3613 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3618 if (part_of_multiple
)
3619 ui_out_field_skip (uiout
, "disp");
3621 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3626 if (part_of_multiple
)
3627 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3629 ui_out_field_fmt (uiout
, "enabled", "%c",
3630 bpenables
[(int) b
->enable_state
]);
3631 ui_out_spaces (uiout
, 2);
3635 strcpy (wrap_indent
, " ");
3638 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3639 strcat (wrap_indent
, " ");
3641 strcat (wrap_indent
, " ");
3644 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3646 /* Although the print_one can possibly print
3647 all locations, calling it here is not likely
3648 to get any nice result. So, make sure there's
3649 just one location. */
3650 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3651 b
->ops
->print_one (b
, last_addr
);
3657 internal_error (__FILE__
, __LINE__
,
3658 _("print_one_breakpoint: bp_none encountered\n"));
3662 case bp_hardware_watchpoint
:
3663 case bp_read_watchpoint
:
3664 case bp_access_watchpoint
:
3665 /* Field 4, the address, is omitted (which makes the columns
3666 not line up too nicely with the headers, but the effect
3667 is relatively readable). */
3669 ui_out_field_skip (uiout
, "addr");
3671 print_expression (b
->exp
, stb
->stream
);
3672 ui_out_field_stream (uiout
, "what", stb
);
3676 case bp_catch_unload
:
3677 /* Field 4, the address, is omitted (which makes the columns
3678 not line up too nicely with the headers, but the effect
3679 is relatively readable). */
3681 ui_out_field_skip (uiout
, "addr");
3683 if (b
->dll_pathname
== NULL
)
3685 ui_out_field_string (uiout
, "what", "<any library>");
3686 ui_out_spaces (uiout
, 1);
3690 ui_out_text (uiout
, "library \"");
3691 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3692 ui_out_text (uiout
, "\" ");
3697 case bp_catch_vfork
:
3698 /* Field 4, the address, is omitted (which makes the columns
3699 not line up too nicely with the headers, but the effect
3700 is relatively readable). */
3702 ui_out_field_skip (uiout
, "addr");
3704 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
3706 ui_out_text (uiout
, "process ");
3707 ui_out_field_int (uiout
, "what",
3708 ptid_get_pid (b
->forked_inferior_pid
));
3709 ui_out_spaces (uiout
, 1);
3714 /* Field 4, the address, is omitted (which makes the columns
3715 not line up too nicely with the headers, but the effect
3716 is relatively readable). */
3718 ui_out_field_skip (uiout
, "addr");
3720 if (b
->exec_pathname
!= NULL
)
3722 ui_out_text (uiout
, "program \"");
3723 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3724 ui_out_text (uiout
, "\" ");
3729 case bp_hardware_breakpoint
:
3733 case bp_longjmp_resume
:
3734 case bp_step_resume
:
3735 case bp_watchpoint_scope
:
3737 case bp_shlib_event
:
3738 case bp_thread_event
:
3739 case bp_overlay_event
:
3743 if (header_of_multiple
)
3744 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3745 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3746 ui_out_field_string (uiout
, "addr", "<PENDING>");
3748 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3751 if (!header_of_multiple
)
3752 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3754 *last_addr
= b
->loc
->address
;
3758 if (!part_of_multiple
&& b
->thread
!= -1)
3760 /* FIXME: This seems to be redundant and lost here; see the
3761 "stop only in" line a little further down. */
3762 ui_out_text (uiout
, " thread ");
3763 ui_out_field_int (uiout
, "thread", b
->thread
);
3766 ui_out_text (uiout
, "\n");
3768 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3771 ui_out_text (uiout
, "\tstop only in stack frame at ");
3772 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3774 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3775 ui_out_text (uiout
, "\n");
3778 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3780 /* We do not print the condition for Ada exception catchpoints
3781 because the condition is an internal implementation detail
3782 that we do not want to expose to the user. */
3784 ui_out_text (uiout
, "\tstop only if ");
3785 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3786 ui_out_text (uiout
, "\n");
3789 if (!part_of_multiple
&& b
->thread
!= -1)
3791 /* FIXME should make an annotation for this */
3792 ui_out_text (uiout
, "\tstop only in thread ");
3793 ui_out_field_int (uiout
, "thread", b
->thread
);
3794 ui_out_text (uiout
, "\n");
3797 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
)
3799 /* FIXME should make an annotation for this */
3800 if (ep_is_catchpoint (b
))
3801 ui_out_text (uiout
, "\tcatchpoint");
3803 ui_out_text (uiout
, "\tbreakpoint");
3804 ui_out_text (uiout
, " already hit ");
3805 ui_out_field_int (uiout
, "times", b
->hit_count
);
3806 if (b
->hit_count
== 1)
3807 ui_out_text (uiout
, " time\n");
3809 ui_out_text (uiout
, " times\n");
3812 /* Output the count also if it is zero, but only if this is
3813 mi. FIXME: Should have a better test for this. */
3814 if (ui_out_is_mi_like_p (uiout
))
3815 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3816 ui_out_field_int (uiout
, "times", b
->hit_count
);
3818 if (!part_of_multiple
&& b
->ignore_count
)
3821 ui_out_text (uiout
, "\tignore next ");
3822 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3823 ui_out_text (uiout
, " hits\n");
3826 if (!part_of_multiple
&& (l
= b
->commands
))
3828 struct cleanup
*script_chain
;
3831 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3832 print_command_lines (uiout
, l
, 4);
3833 do_cleanups (script_chain
);
3836 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3839 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3840 else if (b
->exp_string
)
3841 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3844 do_cleanups (bkpt_chain
);
3845 do_cleanups (old_chain
);
3849 print_one_breakpoint (struct breakpoint
*b
,
3850 CORE_ADDR
*last_addr
)
3852 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3854 /* If this breakpoint has custom print function,
3855 it's already printed. Otherwise, print individual
3856 locations, if any. */
3857 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3859 /* If breakpoint has a single location that is
3860 disabled, we print it as if it had
3861 several locations, since otherwise it's hard to
3862 represent "breakpoint enabled, location disabled"
3864 Note that while hardware watchpoints have
3865 several locations internally, that's no a property
3868 && !is_hardware_watchpoint (b
)
3869 && (b
->loc
->next
|| !b
->loc
->enabled
)
3870 && !ui_out_is_mi_like_p (uiout
))
3872 struct bp_location
*loc
;
3874 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3875 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3881 struct captured_breakpoint_query_args
3887 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3889 struct captured_breakpoint_query_args
*args
= data
;
3890 struct breakpoint
*b
;
3891 CORE_ADDR dummy_addr
= 0;
3894 if (args
->bnum
== b
->number
)
3896 print_one_breakpoint (b
, &dummy_addr
);
3904 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3906 struct captured_breakpoint_query_args args
;
3908 /* For the moment we don't trust print_one_breakpoint() to not throw
3910 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3911 error_message
, RETURN_MASK_ALL
) < 0)
3917 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3918 catchpoints, et.al.). */
3921 user_settable_breakpoint (const struct breakpoint
*b
)
3923 return (b
->type
== bp_breakpoint
3924 || b
->type
== bp_catch_load
3925 || b
->type
== bp_catch_unload
3926 || b
->type
== bp_catch_fork
3927 || b
->type
== bp_catch_vfork
3928 || b
->type
== bp_catch_exec
3929 || b
->type
== bp_hardware_breakpoint
3930 || b
->type
== bp_watchpoint
3931 || b
->type
== bp_read_watchpoint
3932 || b
->type
== bp_access_watchpoint
3933 || b
->type
== bp_hardware_watchpoint
);
3936 /* Print information on user settable breakpoint (watchpoint, etc)
3937 number BNUM. If BNUM is -1 print all user settable breakpoints.
3938 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3941 breakpoint_1 (int bnum
, int allflag
)
3943 struct breakpoint
*b
;
3944 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3945 int nr_printable_breakpoints
;
3946 struct cleanup
*bkpttbl_chain
;
3948 /* Compute the number of rows in the table. */
3949 nr_printable_breakpoints
= 0;
3952 || bnum
== b
->number
)
3954 if (allflag
|| user_settable_breakpoint (b
))
3955 nr_printable_breakpoints
++;
3960 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3964 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3967 if (nr_printable_breakpoints
> 0)
3968 annotate_breakpoints_headers ();
3969 if (nr_printable_breakpoints
> 0)
3971 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3972 if (nr_printable_breakpoints
> 0)
3974 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3975 if (nr_printable_breakpoints
> 0)
3977 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3978 if (nr_printable_breakpoints
> 0)
3980 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3983 if (nr_printable_breakpoints
> 0)
3985 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3986 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3988 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3990 if (nr_printable_breakpoints
> 0)
3992 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3993 ui_out_table_body (uiout
);
3994 if (nr_printable_breakpoints
> 0)
3995 annotate_breakpoints_table ();
3999 || bnum
== b
->number
)
4001 /* We only print out user settable breakpoints unless the
4003 if (allflag
|| user_settable_breakpoint (b
))
4004 print_one_breakpoint (b
, &last_addr
);
4007 do_cleanups (bkpttbl_chain
);
4009 if (nr_printable_breakpoints
== 0)
4012 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
4014 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
4019 /* Compare against (CORE_ADDR)-1 in case some compiler decides
4020 that a comparison of an unsigned with -1 is always false. */
4021 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
4022 set_next_address (last_addr
);
4025 /* FIXME? Should this be moved up so that it is only called when
4026 there have been breakpoints? */
4027 annotate_breakpoints_table_end ();
4031 breakpoints_info (char *bnum_exp
, int from_tty
)
4036 bnum
= parse_and_eval_long (bnum_exp
);
4038 breakpoint_1 (bnum
, 0);
4042 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
4047 bnum
= parse_and_eval_long (bnum_exp
);
4049 breakpoint_1 (bnum
, 1);
4053 breakpoint_has_pc (struct breakpoint
*b
,
4054 CORE_ADDR pc
, struct obj_section
*section
)
4056 struct bp_location
*bl
= b
->loc
;
4057 for (; bl
; bl
= bl
->next
)
4059 if (bl
->address
== pc
4060 && (!overlay_debugging
|| bl
->section
== section
))
4066 /* Print a message describing any breakpoints set at PC. */
4069 describe_other_breakpoints (CORE_ADDR pc
, struct obj_section
*section
,
4073 struct breakpoint
*b
;
4076 others
+= breakpoint_has_pc (b
, pc
, section
);
4080 printf_filtered (_("Note: breakpoint "));
4081 else /* if (others == ???) */
4082 printf_filtered (_("Note: breakpoints "));
4084 if (breakpoint_has_pc (b
, pc
, section
))
4087 printf_filtered ("%d", b
->number
);
4088 if (b
->thread
== -1 && thread
!= -1)
4089 printf_filtered (" (all threads)");
4090 else if (b
->thread
!= -1)
4091 printf_filtered (" (thread %d)", b
->thread
);
4092 printf_filtered ("%s%s ",
4093 ((b
->enable_state
== bp_disabled
||
4094 b
->enable_state
== bp_call_disabled
)
4096 : b
->enable_state
== bp_permanent
4100 : ((others
== 1) ? " and" : ""));
4102 printf_filtered (_("also set at pc "));
4103 fputs_filtered (paddress (pc
), gdb_stdout
);
4104 printf_filtered (".\n");
4108 /* Set the default place to put a breakpoint
4109 for the `break' command with no arguments. */
4112 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
4115 default_breakpoint_valid
= valid
;
4116 default_breakpoint_address
= addr
;
4117 default_breakpoint_symtab
= symtab
;
4118 default_breakpoint_line
= line
;
4121 /* Return true iff it is meaningful to use the address member of
4122 BPT. For some breakpoint types, the address member is irrelevant
4123 and it makes no sense to attempt to compare it to other addresses
4124 (or use it for any other purpose either).
4126 More specifically, each of the following breakpoint types will always
4127 have a zero valued address and we don't want check_duplicates() to mark
4128 breakpoints of any of these types to be a duplicate of an actual
4129 breakpoint at address zero:
4132 bp_hardware_watchpoint
4134 bp_access_watchpoint
4140 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
4142 enum bptype type
= bpt
->type
;
4144 return (type
!= bp_watchpoint
4145 && type
!= bp_hardware_watchpoint
4146 && type
!= bp_read_watchpoint
4147 && type
!= bp_access_watchpoint
4148 && type
!= bp_catch_exec
4149 && type
!= bp_catch_fork
4150 && type
!= bp_catch_vfork
);
4153 /* Rescan breakpoints at the same address and section as BPT,
4154 marking the first one as "first" and any others as "duplicates".
4155 This is so that the bpt instruction is only inserted once.
4156 If we have a permanent breakpoint at the same place as BPT, make
4157 that one the official one, and the rest as duplicates. */
4160 check_duplicates_for (CORE_ADDR address
, struct obj_section
*section
)
4162 struct bp_location
*b
;
4164 struct bp_location
*perm_bp
= 0;
4166 ALL_BP_LOCATIONS (b
)
4167 if (b
->owner
->enable_state
!= bp_disabled
4168 && b
->owner
->enable_state
!= bp_call_disabled
4170 && !b
->shlib_disabled
4171 && b
->address
== address
/* address / overlay match */
4172 && (!overlay_debugging
|| b
->section
== section
)
4173 && breakpoint_address_is_meaningful (b
->owner
))
4175 /* Have we found a permanent breakpoint? */
4176 if (b
->owner
->enable_state
== bp_permanent
)
4183 b
->duplicate
= count
> 1;
4186 /* If we found a permanent breakpoint at this address, go over the
4187 list again and declare all the other breakpoints there to be the
4191 perm_bp
->duplicate
= 0;
4193 /* Permanent breakpoint should always be inserted. */
4194 if (! perm_bp
->inserted
)
4195 internal_error (__FILE__
, __LINE__
,
4196 _("allegedly permanent breakpoint is not "
4197 "actually inserted"));
4199 ALL_BP_LOCATIONS (b
)
4202 if (b
->owner
->enable_state
!= bp_disabled
4203 && b
->owner
->enable_state
!= bp_call_disabled
4204 && b
->enabled
&& !b
->shlib_disabled
4205 && b
->address
== address
/* address / overlay match */
4206 && (!overlay_debugging
|| b
->section
== section
)
4207 && breakpoint_address_is_meaningful (b
->owner
))
4210 internal_error (__FILE__
, __LINE__
,
4211 _("another breakpoint was inserted on top of "
4212 "a permanent breakpoint"));
4221 check_duplicates (struct breakpoint
*bpt
)
4223 struct bp_location
*bl
= bpt
->loc
;
4225 if (! breakpoint_address_is_meaningful (bpt
))
4228 for (; bl
; bl
= bl
->next
)
4229 check_duplicates_for (bl
->address
, bl
->section
);
4233 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4234 int bnum
, int have_bnum
)
4239 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4240 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4242 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4243 bnum
, astr1
, astr2
);
4245 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4248 /* Adjust a breakpoint's address to account for architectural constraints
4249 on breakpoint placement. Return the adjusted address. Note: Very
4250 few targets require this kind of adjustment. For most targets,
4251 this function is simply the identity function. */
4254 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4256 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4258 /* Very few targets need any kind of breakpoint adjustment. */
4261 else if (bptype
== bp_watchpoint
4262 || bptype
== bp_hardware_watchpoint
4263 || bptype
== bp_read_watchpoint
4264 || bptype
== bp_access_watchpoint
4265 || bptype
== bp_catch_fork
4266 || bptype
== bp_catch_vfork
4267 || bptype
== bp_catch_exec
)
4269 /* Watchpoints and the various bp_catch_* eventpoints should not
4270 have their addresses modified. */
4275 CORE_ADDR adjusted_bpaddr
;
4277 /* Some targets have architectural constraints on the placement
4278 of breakpoint instructions. Obtain the adjusted address. */
4279 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4282 /* An adjusted breakpoint address can significantly alter
4283 a user's expectations. Print a warning if an adjustment
4285 if (adjusted_bpaddr
!= bpaddr
)
4286 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4288 return adjusted_bpaddr
;
4292 /* Allocate a struct bp_location. */
4294 static struct bp_location
*
4295 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
4297 struct bp_location
*loc
, *loc_p
;
4299 loc
= xmalloc (sizeof (struct bp_location
));
4300 memset (loc
, 0, sizeof (*loc
));
4304 loc
->shlib_disabled
= 0;
4313 case bp_longjmp_resume
:
4314 case bp_step_resume
:
4315 case bp_watchpoint_scope
:
4317 case bp_shlib_event
:
4318 case bp_thread_event
:
4319 case bp_overlay_event
:
4321 case bp_catch_unload
:
4322 loc
->loc_type
= bp_loc_software_breakpoint
;
4324 case bp_hardware_breakpoint
:
4325 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4327 case bp_hardware_watchpoint
:
4328 case bp_read_watchpoint
:
4329 case bp_access_watchpoint
:
4330 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4334 case bp_catch_vfork
:
4336 loc
->loc_type
= bp_loc_other
;
4339 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4345 static void free_bp_location (struct bp_location
*loc
)
4350 if (loc
->function_name
)
4351 xfree (loc
->function_name
);
4356 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4357 that has type BPTYPE and has no locations as yet. */
4359 static struct breakpoint
*
4360 set_raw_breakpoint_without_location (enum bptype bptype
)
4362 struct breakpoint
*b
, *b1
;
4364 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4365 memset (b
, 0, sizeof (*b
));
4368 b
->language
= current_language
->la_language
;
4369 b
->input_radix
= input_radix
;
4371 b
->enable_state
= bp_enabled
;
4374 b
->ignore_count
= 0;
4376 b
->frame_id
= null_frame_id
;
4377 b
->dll_pathname
= NULL
;
4378 b
->triggered_dll_pathname
= NULL
;
4379 b
->forked_inferior_pid
= null_ptid
;
4380 b
->exec_pathname
= NULL
;
4382 b
->condition_not_parsed
= 0;
4384 /* Add this breakpoint to the end of the chain
4385 so that a list of breakpoints will come out in order
4386 of increasing numbers. */
4388 b1
= breakpoint_chain
;
4390 breakpoint_chain
= b
;
4400 /* Initialize loc->function_name. */
4402 set_breakpoint_location_function (struct bp_location
*loc
)
4404 if (loc
->owner
->type
== bp_breakpoint
4405 || loc
->owner
->type
== bp_hardware_breakpoint
)
4407 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4409 if (loc
->function_name
)
4410 loc
->function_name
= xstrdup (loc
->function_name
);
4414 /* set_raw_breakpoint is a low level routine for allocating and
4415 partially initializing a breakpoint of type BPTYPE. The newly
4416 created breakpoint's address, section, source file name, and line
4417 number are provided by SAL. The newly created and partially
4418 initialized breakpoint is added to the breakpoint chain and
4419 is also returned as the value of this function.
4421 It is expected that the caller will complete the initialization of
4422 the newly created breakpoint struct as well as output any status
4423 information regarding the creation of a new breakpoint. In
4424 particular, set_raw_breakpoint does NOT set the breakpoint
4425 number! Care should be taken to not allow an error to occur
4426 prior to completing the initialization of the breakpoint. If this
4427 should happen, a bogus breakpoint will be left on the chain. */
4430 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4432 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4433 CORE_ADDR adjusted_address
;
4435 /* Adjust the breakpoint's address prior to allocating a location.
4436 Once we call allocate_bp_location(), that mostly uninitialized
4437 location will be placed on the location chain. Adjustment of the
4438 breakpoint may cause target_read_memory() to be called and we do
4439 not want its scan of the location chain to find a breakpoint and
4440 location that's only been partially initialized. */
4441 adjusted_address
= adjust_breakpoint_address (sal
.pc
, bptype
);
4443 b
->loc
= allocate_bp_location (b
, bptype
);
4444 b
->loc
->requested_address
= sal
.pc
;
4445 b
->loc
->address
= adjusted_address
;
4447 if (sal
.symtab
== NULL
)
4448 b
->source_file
= NULL
;
4450 b
->source_file
= savestring (sal
.symtab
->filename
,
4451 strlen (sal
.symtab
->filename
));
4452 b
->loc
->section
= sal
.section
;
4453 b
->line_number
= sal
.line
;
4455 set_breakpoint_location_function (b
->loc
);
4457 breakpoints_changed ();
4463 /* Note that the breakpoint object B describes a permanent breakpoint
4464 instruction, hard-wired into the inferior's code. */
4466 make_breakpoint_permanent (struct breakpoint
*b
)
4468 struct bp_location
*bl
;
4469 b
->enable_state
= bp_permanent
;
4471 /* By definition, permanent breakpoints are already present in the code.
4472 Mark all locations as inserted. For now, make_breakpoint_permanent
4473 is called in just one place, so it's hard to say if it's reasonable
4474 to have permanent breakpoint with multiple locations or not,
4475 but it's easy to implmement. */
4476 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4480 static struct breakpoint
*
4481 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4483 static int internal_breakpoint_number
= -1;
4484 struct symtab_and_line sal
;
4485 struct breakpoint
*b
;
4487 init_sal (&sal
); /* initialize to zeroes */
4490 sal
.section
= find_pc_overlay (sal
.pc
);
4492 b
= set_raw_breakpoint (sal
, type
);
4493 b
->number
= internal_breakpoint_number
--;
4494 b
->disposition
= disp_donttouch
;
4501 create_longjmp_breakpoint (char *func_name
)
4503 struct minimal_symbol
*m
;
4505 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4507 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4508 update_global_location_list (1);
4511 /* Call this routine when stepping and nexting to enable a breakpoint
4512 if we do a longjmp(). When we hit that breakpoint, call
4513 set_longjmp_resume_breakpoint() to figure out where we are going. */
4516 set_longjmp_breakpoint (void)
4518 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4520 create_longjmp_breakpoint ("longjmp");
4521 create_longjmp_breakpoint ("_longjmp");
4522 create_longjmp_breakpoint ("siglongjmp");
4523 create_longjmp_breakpoint ("_siglongjmp");
4527 /* Delete all longjmp breakpoints from THREAD. */
4529 delete_longjmp_breakpoint (int thread
)
4531 struct breakpoint
*b
, *temp
;
4533 ALL_BREAKPOINTS_SAFE (b
, temp
)
4534 if (b
->type
== bp_longjmp
)
4536 if (b
->thread
== thread
)
4537 delete_breakpoint (b
);
4542 create_overlay_event_breakpoint_1 (char *func_name
, struct objfile
*objfile
)
4544 struct breakpoint
*b
;
4545 struct minimal_symbol
*m
;
4547 if ((m
= lookup_minimal_symbol_text (func_name
, objfile
)) == NULL
)
4550 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4552 b
->addr_string
= xstrdup (func_name
);
4554 if (overlay_debugging
== ovly_auto
)
4556 b
->enable_state
= bp_enabled
;
4557 overlay_events_enabled
= 1;
4561 b
->enable_state
= bp_disabled
;
4562 overlay_events_enabled
= 0;
4564 update_global_location_list (1);
4568 create_overlay_event_breakpoint (char *func_name
)
4570 struct objfile
*objfile
;
4571 ALL_OBJFILES (objfile
)
4572 create_overlay_event_breakpoint_1 (func_name
, objfile
);
4576 enable_overlay_breakpoints (void)
4578 struct breakpoint
*b
;
4581 if (b
->type
== bp_overlay_event
)
4583 b
->enable_state
= bp_enabled
;
4584 update_global_location_list (1);
4585 overlay_events_enabled
= 1;
4590 disable_overlay_breakpoints (void)
4592 struct breakpoint
*b
;
4595 if (b
->type
== bp_overlay_event
)
4597 b
->enable_state
= bp_disabled
;
4598 update_global_location_list (0);
4599 overlay_events_enabled
= 0;
4604 create_thread_event_breakpoint (CORE_ADDR address
)
4606 struct breakpoint
*b
;
4608 b
= create_internal_breakpoint (address
, bp_thread_event
);
4610 b
->enable_state
= bp_enabled
;
4611 /* addr_string has to be used or breakpoint_re_set will delete me. */
4612 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4614 update_global_location_list_nothrow (1);
4620 remove_thread_event_breakpoints (void)
4622 struct breakpoint
*b
, *temp
;
4624 ALL_BREAKPOINTS_SAFE (b
, temp
)
4625 if (b
->type
== bp_thread_event
)
4626 delete_breakpoint (b
);
4629 struct captured_parse_breakpoint_args
4632 struct symtabs_and_lines
*sals_p
;
4633 char ***addr_string_p
;
4637 struct lang_and_radix
4645 remove_solib_event_breakpoints (void)
4647 struct breakpoint
*b
, *temp
;
4649 ALL_BREAKPOINTS_SAFE (b
, temp
)
4650 if (b
->type
== bp_shlib_event
)
4651 delete_breakpoint (b
);
4655 create_solib_event_breakpoint (CORE_ADDR address
)
4657 struct breakpoint
*b
;
4659 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4660 update_global_location_list_nothrow (1);
4664 /* Disable any breakpoints that are on code in shared libraries. Only
4665 apply to enabled breakpoints, disabled ones can just stay disabled. */
4668 disable_breakpoints_in_shlibs (void)
4670 struct bp_location
*loc
;
4671 int disabled_shlib_breaks
= 0;
4673 ALL_BP_LOCATIONS (loc
)
4675 struct breakpoint
*b
= loc
->owner
;
4676 /* We apply the check to all breakpoints, including disabled
4677 for those with loc->duplicate set. This is so that when breakpoint
4678 becomes enabled, or the duplicate is removed, gdb will try to insert
4679 all breakpoints. If we don't set shlib_disabled here, we'll try
4680 to insert those breakpoints and fail. */
4681 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4682 && !loc
->shlib_disabled
4684 && PC_SOLIB (loc
->address
)
4686 && solib_address (loc
->address
)
4690 loc
->shlib_disabled
= 1;
4695 /* Disable any breakpoints that are in in an unloaded shared library. Only
4696 apply to enabled breakpoints, disabled ones can just stay disabled. */
4699 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4701 struct bp_location
*loc
;
4702 int disabled_shlib_breaks
= 0;
4704 ALL_BP_LOCATIONS (loc
)
4706 struct breakpoint
*b
= loc
->owner
;
4707 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4708 || loc
->loc_type
== bp_loc_software_breakpoint
)
4709 && !loc
->shlib_disabled
)
4712 char *so_name
= PC_SOLIB (loc
->address
);
4714 char *so_name
= solib_address (loc
->address
);
4716 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4718 loc
->shlib_disabled
= 1;
4719 /* At this point, we cannot rely on remove_breakpoint
4720 succeeding so we must mark the breakpoint as not inserted
4721 to prevent future errors occurring in remove_breakpoints. */
4723 if (!disabled_shlib_breaks
)
4725 target_terminal_ours_for_output ();
4726 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4729 disabled_shlib_breaks
= 1;
4736 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4737 enum bptype bp_kind
)
4739 struct symtab_and_line sal
;
4740 struct breakpoint
*b
;
4741 int thread
= -1; /* All threads. */
4748 b
= set_raw_breakpoint (sal
, bp_kind
);
4749 set_breakpoint_count (breakpoint_count
+ 1);
4750 b
->number
= breakpoint_count
;
4751 b
->cond_string
= (cond_string
== NULL
) ?
4752 NULL
: savestring (cond_string
, strlen (cond_string
));
4754 b
->addr_string
= NULL
;
4755 b
->enable_state
= bp_enabled
;
4756 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4757 b
->forked_inferior_pid
= null_ptid
;
4758 update_global_location_list (1);
4765 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4767 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4771 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4773 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4777 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4779 struct symtab_and_line sal
;
4780 struct breakpoint
*b
;
4781 int thread
= -1; /* All threads. */
4788 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4789 set_breakpoint_count (breakpoint_count
+ 1);
4790 b
->number
= breakpoint_count
;
4791 b
->cond_string
= (cond_string
== NULL
) ?
4792 NULL
: savestring (cond_string
, strlen (cond_string
));
4794 b
->addr_string
= NULL
;
4795 b
->enable_state
= bp_enabled
;
4796 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4797 update_global_location_list (1);
4803 hw_breakpoint_used_count (void)
4805 struct breakpoint
*b
;
4810 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
4818 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4820 struct breakpoint
*b
;
4823 *other_type_used
= 0;
4826 if (breakpoint_enabled (b
))
4828 if (b
->type
== type
)
4830 else if ((b
->type
== bp_hardware_watchpoint
||
4831 b
->type
== bp_read_watchpoint
||
4832 b
->type
== bp_access_watchpoint
))
4833 *other_type_used
= 1;
4840 disable_watchpoints_before_interactive_call_start (void)
4842 struct breakpoint
*b
;
4846 if (((b
->type
== bp_watchpoint
)
4847 || (b
->type
== bp_hardware_watchpoint
)
4848 || (b
->type
== bp_read_watchpoint
)
4849 || (b
->type
== bp_access_watchpoint
))
4850 && breakpoint_enabled (b
))
4852 b
->enable_state
= bp_call_disabled
;
4853 update_global_location_list (0);
4859 enable_watchpoints_after_interactive_call_stop (void)
4861 struct breakpoint
*b
;
4865 if (((b
->type
== bp_watchpoint
)
4866 || (b
->type
== bp_hardware_watchpoint
)
4867 || (b
->type
== bp_read_watchpoint
)
4868 || (b
->type
== bp_access_watchpoint
))
4869 && (b
->enable_state
== bp_call_disabled
))
4871 b
->enable_state
= bp_enabled
;
4872 update_global_location_list (1);
4878 /* Set a breakpoint that will evaporate an end of command
4879 at address specified by SAL.
4880 Restrict it to frame FRAME if FRAME is nonzero. */
4883 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4886 struct breakpoint
*b
;
4887 b
= set_raw_breakpoint (sal
, type
);
4888 b
->enable_state
= bp_enabled
;
4889 b
->disposition
= disp_donttouch
;
4890 b
->frame_id
= frame_id
;
4892 /* If we're debugging a multi-threaded program, then we
4893 want momentary breakpoints to be active in only a
4894 single thread of control. */
4895 if (in_thread_list (inferior_ptid
))
4896 b
->thread
= pid_to_thread_id (inferior_ptid
);
4898 update_global_location_list_nothrow (1);
4904 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
4906 struct symtab_and_line sal
;
4908 sal
= find_pc_line (pc
, 0);
4910 sal
.section
= find_pc_overlay (pc
);
4911 sal
.explicit_pc
= 1;
4913 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
4917 /* Tell the user we have just set a breakpoint B. */
4920 mention (struct breakpoint
*b
)
4923 struct cleanup
*old_chain
, *ui_out_chain
;
4924 struct ui_stream
*stb
;
4926 stb
= ui_out_stream_new (uiout
);
4927 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4929 /* FIXME: This is misplaced; mention() is called by things (like
4930 hitting a watchpoint) other than breakpoint creation. It should
4931 be possible to clean this up and at the same time replace the
4932 random calls to breakpoint_changed with this hook. */
4933 observer_notify_breakpoint_created (b
->number
);
4935 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4936 b
->ops
->print_mention (b
);
4941 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4944 ui_out_text (uiout
, "Watchpoint ");
4945 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4946 ui_out_field_int (uiout
, "number", b
->number
);
4947 ui_out_text (uiout
, ": ");
4948 print_expression (b
->exp
, stb
->stream
);
4949 ui_out_field_stream (uiout
, "exp", stb
);
4950 do_cleanups (ui_out_chain
);
4952 case bp_hardware_watchpoint
:
4953 ui_out_text (uiout
, "Hardware watchpoint ");
4954 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4955 ui_out_field_int (uiout
, "number", b
->number
);
4956 ui_out_text (uiout
, ": ");
4957 print_expression (b
->exp
, stb
->stream
);
4958 ui_out_field_stream (uiout
, "exp", stb
);
4959 do_cleanups (ui_out_chain
);
4961 case bp_read_watchpoint
:
4962 ui_out_text (uiout
, "Hardware read watchpoint ");
4963 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
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_access_watchpoint
:
4971 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4972 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
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
);
4980 if (ui_out_is_mi_like_p (uiout
))
4985 if (b
->disposition
== disp_del
)
4986 printf_filtered (_("Temporary breakpoint"));
4988 printf_filtered (_("Breakpoint"));
4989 printf_filtered (_(" %d"), b
->number
);
4992 case bp_hardware_breakpoint
:
4993 if (ui_out_is_mi_like_p (uiout
))
4998 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
5002 case bp_catch_unload
:
5003 printf_filtered (_("Catchpoint %d (%s %s)"),
5005 (b
->type
== bp_catch_load
) ? "load" : "unload",
5006 (b
->dll_pathname
!= NULL
) ?
5007 b
->dll_pathname
: "<any library>");
5010 case bp_catch_vfork
:
5011 printf_filtered (_("Catchpoint %d (%s)"),
5013 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
5016 printf_filtered (_("Catchpoint %d (exec)"),
5023 case bp_longjmp_resume
:
5024 case bp_step_resume
:
5026 case bp_watchpoint_scope
:
5027 case bp_shlib_event
:
5028 case bp_thread_event
:
5029 case bp_overlay_event
:
5035 /* i18n: cagney/2005-02-11: Below needs to be merged into a
5039 printf_filtered (_(" (%s) pending."), b
->addr_string
);
5043 if (addressprint
|| b
->source_file
== NULL
)
5045 printf_filtered (" at ");
5046 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5049 printf_filtered (": file %s, line %d.",
5050 b
->source_file
, b
->line_number
);
5054 struct bp_location
*loc
= b
->loc
;
5056 for (; loc
; loc
= loc
->next
)
5058 printf_filtered (" (%d locations)", n
);
5063 do_cleanups (old_chain
);
5064 if (ui_out_is_mi_like_p (uiout
))
5066 printf_filtered ("\n");
5070 static struct bp_location
*
5071 add_location_to_breakpoint (struct breakpoint
*b
, enum bptype bptype
,
5072 const struct symtab_and_line
*sal
)
5074 struct bp_location
*loc
, **tmp
;
5076 loc
= allocate_bp_location (b
, bptype
);
5077 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5080 loc
->requested_address
= sal
->pc
;
5081 loc
->address
= adjust_breakpoint_address (loc
->requested_address
,
5083 loc
->section
= sal
->section
;
5085 set_breakpoint_location_function (loc
);
5090 /* Return 1 if LOC is pointing to a permanent breakpoint,
5091 return 0 otherwise. */
5094 bp_loc_is_permanent (struct bp_location
*loc
)
5098 const gdb_byte
*brk
;
5099 gdb_byte
*target_mem
;
5101 gdb_assert (loc
!= NULL
);
5103 addr
= loc
->address
;
5104 brk
= gdbarch_breakpoint_from_pc (current_gdbarch
, &addr
, &len
);
5106 target_mem
= alloca (len
);
5108 if (target_read_memory (loc
->address
, target_mem
, len
) == 0
5109 && memcmp (target_mem
, brk
, len
) == 0)
5117 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5118 as textual description of the location, and COND_STRING
5119 as condition expression. */
5122 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5124 enum bptype type
, enum bpdisp disposition
,
5125 int thread
, int ignore_count
,
5126 struct breakpoint_ops
*ops
, int from_tty
)
5128 struct breakpoint
*b
= NULL
;
5131 if (type
== bp_hardware_breakpoint
)
5133 int i
= hw_breakpoint_used_count ();
5134 int target_resources_ok
=
5135 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5137 if (target_resources_ok
== 0)
5138 error (_("No hardware breakpoint support in the target."));
5139 else if (target_resources_ok
< 0)
5140 error (_("Hardware breakpoints used exceeds limit."));
5143 for (i
= 0; i
< sals
.nelts
; ++i
)
5145 struct symtab_and_line sal
= sals
.sals
[i
];
5146 struct bp_location
*loc
;
5149 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5153 b
= set_raw_breakpoint (sal
, type
);
5154 set_breakpoint_count (breakpoint_count
+ 1);
5155 b
->number
= breakpoint_count
;
5158 b
->cond_string
= cond_string
;
5159 b
->ignore_count
= ignore_count
;
5160 b
->enable_state
= bp_enabled
;
5161 b
->disposition
= disposition
;
5167 loc
= add_location_to_breakpoint (b
, type
, &sal
);
5170 if (bp_loc_is_permanent (loc
))
5171 make_breakpoint_permanent (b
);
5175 char *arg
= b
->cond_string
;
5176 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5178 error (_("Garbage %s follows condition"), arg
);
5183 b
->addr_string
= addr_string
;
5185 /* addr_string has to be used or breakpoint_re_set will delete
5187 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5193 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5194 elements to fill the void space. */
5195 static void remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5197 int i
= index_to_remove
+1;
5198 int last_index
= sal
->nelts
-1;
5200 for (;i
<= last_index
; ++i
)
5201 sal
->sals
[i
-1] = sal
->sals
[i
];
5206 /* If appropriate, obtains all sals that correspond
5207 to the same file and line as SAL. This is done
5208 only if SAL does not have explicit PC and has
5209 line and file information. If we got just a single
5210 expanded sal, return the original.
5212 Otherwise, if SAL.explicit_line is not set, filter out
5213 all sals for which the name of enclosing function
5214 is different from SAL. This makes sure that if we have
5215 breakpoint originally set in template instantiation, say
5216 foo<int>(), we won't expand SAL to locations at the same
5217 line in all existing instantiations of 'foo'.
5220 struct symtabs_and_lines
5221 expand_line_sal_maybe (struct symtab_and_line sal
)
5223 struct symtabs_and_lines expanded
;
5224 CORE_ADDR original_pc
= sal
.pc
;
5225 char *original_function
= NULL
;
5229 /* If we have explicit pc, don't expand.
5230 If we have no line number, we can't expand. */
5231 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5234 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5235 expanded
.sals
[0] = sal
;
5240 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5242 expanded
= expand_line_sal (sal
);
5243 if (expanded
.nelts
== 1)
5245 /* We had one sal, we got one sal. Without futher
5246 processing, just return the original sal. */
5247 xfree (expanded
.sals
);
5249 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5250 sal
.pc
= original_pc
;
5251 expanded
.sals
[0] = sal
;
5255 if (!sal
.explicit_line
)
5257 CORE_ADDR func_addr
, func_end
;
5258 for (i
= 0; i
< expanded
.nelts
; ++i
)
5260 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5261 char *this_function
;
5262 if (find_pc_partial_function (pc
, &this_function
,
5263 &func_addr
, &func_end
))
5265 if (this_function
&&
5266 strcmp (this_function
, original_function
) != 0)
5268 remove_sal (&expanded
, i
);
5271 else if (func_addr
== pc
)
5273 /* We're at beginning of a function, and should
5275 struct symbol
*sym
= find_pc_function (pc
);
5277 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5280 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5287 if (expanded
.nelts
<= 1)
5289 /* This is un ugly workaround. If we get zero
5290 expanded sals then something is really wrong.
5291 Fix that by returnign the original sal. */
5292 xfree (expanded
.sals
);
5294 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5295 sal
.pc
= original_pc
;
5296 expanded
.sals
[0] = sal
;
5303 for (i
= 0; i
< expanded
.nelts
; ++i
)
5304 if (expanded
.sals
[i
].pc
== original_pc
)
5315 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5316 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5317 value. COND_STRING, if not NULL, specified the condition to be
5318 used for all breakpoints. Essentially the only case where
5319 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5320 function. In that case, it's still not possible to specify
5321 separate conditions for different overloaded functions, so
5322 we take just a single condition string.
5324 NOTE: If the function succeeds, the caller is expected to cleanup
5325 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5326 array contents). If the function fails (error() is called), the
5327 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5328 COND and SALS arrays and each of those arrays contents. */
5331 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5333 enum bptype type
, enum bpdisp disposition
,
5334 int thread
, int ignore_count
,
5335 struct breakpoint_ops
*ops
, int from_tty
)
5338 for (i
= 0; i
< sals
.nelts
; ++i
)
5340 struct symtabs_and_lines expanded
=
5341 expand_line_sal_maybe (sals
.sals
[i
]);
5343 create_breakpoint (expanded
, addr_string
[i
],
5344 cond_string
, type
, disposition
,
5345 thread
, ignore_count
, ops
, from_tty
);
5348 update_global_location_list (1);
5351 /* Parse ARG which is assumed to be a SAL specification possibly
5352 followed by conditionals. On return, SALS contains an array of SAL
5353 addresses found. ADDR_STRING contains a vector of (canonical)
5354 address strings. ARG points to the end of the SAL. */
5357 parse_breakpoint_sals (char **address
,
5358 struct symtabs_and_lines
*sals
,
5359 char ***addr_string
,
5362 char *addr_start
= *address
;
5363 *addr_string
= NULL
;
5364 /* If no arg given, or if first arg is 'if ', use the default
5366 if ((*address
) == NULL
5367 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5369 if (default_breakpoint_valid
)
5371 struct symtab_and_line sal
;
5372 init_sal (&sal
); /* initialize to zeroes */
5373 sals
->sals
= (struct symtab_and_line
*)
5374 xmalloc (sizeof (struct symtab_and_line
));
5375 sal
.pc
= default_breakpoint_address
;
5376 sal
.line
= default_breakpoint_line
;
5377 sal
.symtab
= default_breakpoint_symtab
;
5378 sal
.section
= find_pc_overlay (sal
.pc
);
5379 sals
->sals
[0] = sal
;
5383 error (_("No default breakpoint address now."));
5387 /* Force almost all breakpoints to be in terms of the
5388 current_source_symtab (which is decode_line_1's default). This
5389 should produce the results we want almost all of the time while
5390 leaving default_breakpoint_* alone.
5391 ObjC: However, don't match an Objective-C method name which
5392 may have a '+' or '-' succeeded by a '[' */
5394 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5396 if (default_breakpoint_valid
5398 || ((strchr ("+-", (*address
)[0]) != NULL
)
5399 && ((*address
)[1] != '['))))
5400 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5401 default_breakpoint_line
, addr_string
,
5404 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5405 addr_string
, not_found_ptr
);
5407 /* For any SAL that didn't have a canonical string, fill one in. */
5408 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5409 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5410 if (addr_start
!= (*address
))
5413 for (i
= 0; i
< sals
->nelts
; i
++)
5415 /* Add the string if not present. */
5416 if ((*addr_string
)[i
] == NULL
)
5417 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5423 /* Convert each SAL into a real PC. Verify that the PC can be
5424 inserted as a breakpoint. If it can't throw an error. */
5427 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5431 for (i
= 0; i
< sals
->nelts
; i
++)
5432 resolve_sal_pc (&sals
->sals
[i
]);
5436 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5438 struct captured_parse_breakpoint_args
*args
= data
;
5440 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5441 args
->not_found_ptr
);
5444 /* Given TOK, a string specification of condition and thread, as
5445 accepted by the 'break' command, extract the condition
5446 string and thread number and set *COND_STRING and *THREAD.
5447 PC identifies the context at which the condition should be parsed.
5448 If no condition is found, *COND_STRING is set to NULL.
5449 If no thread is found, *THREAD is set to -1. */
5451 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5452 char **cond_string
, int *thread
)
5454 *cond_string
= NULL
;
5460 char *cond_start
= NULL
;
5461 char *cond_end
= NULL
;
5462 while (*tok
== ' ' || *tok
== '\t')
5467 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5470 toklen
= end_tok
- tok
;
5472 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5474 tok
= cond_start
= end_tok
+ 1;
5475 parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5477 *cond_string
= savestring (cond_start
,
5478 cond_end
- cond_start
);
5480 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5486 *thread
= strtol (tok
, &tok
, 0);
5488 error (_("Junk after thread keyword."));
5489 if (!valid_thread_id (*thread
))
5490 error (_("Unknown thread %d."), *thread
);
5493 error (_("Junk at end of arguments."));
5497 /* Set a breakpoint. This function is shared between
5498 CLI and MI functions for setting a breakpoint.
5499 This function has two major modes of operations,
5500 selected by the PARSE_CONDITION_AND_THREAD parameter.
5501 If non-zero, the function will parse arg, extracting
5502 breakpoint location, address and thread. Otherwise,
5503 ARG is just the location of breakpoint, with condition
5504 and thread specified by the COND_STRING and THREAD
5508 break_command_really (char *arg
, char *cond_string
, int thread
,
5509 int parse_condition_and_thread
,
5510 int tempflag
, int hardwareflag
,
5512 enum auto_boolean pending_break_support
,
5513 struct breakpoint_ops
*ops
,
5516 struct gdb_exception e
;
5517 struct symtabs_and_lines sals
;
5518 struct symtab_and_line pending_sal
;
5521 char *addr_start
= arg
;
5523 struct cleanup
*old_chain
;
5524 struct cleanup
*breakpoint_chain
= NULL
;
5525 struct captured_parse_breakpoint_args parse_args
;
5534 parse_args
.arg_p
= &arg
;
5535 parse_args
.sals_p
= &sals
;
5536 parse_args
.addr_string_p
= &addr_string
;
5537 parse_args
.not_found_ptr
= ¬_found
;
5539 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5540 &parse_args
, RETURN_MASK_ALL
);
5542 /* If caller is interested in rc value from parse, set value. */
5546 throw_exception (e
);
5550 case NOT_FOUND_ERROR
:
5552 /* If pending breakpoint support is turned off, throw
5555 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5556 throw_exception (e
);
5558 exception_print (gdb_stderr
, e
);
5560 /* If pending breakpoint support is auto query and the user
5561 selects no, then simply return the error code. */
5562 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5563 !nquery ("Make breakpoint pending on future shared library load? "))
5566 /* At this point, either the user was queried about setting
5567 a pending breakpoint and selected yes, or pending
5568 breakpoint behavior is on and thus a pending breakpoint
5569 is defaulted on behalf of the user. */
5570 copy_arg
= xstrdup (addr_start
);
5571 addr_string
= ©_arg
;
5573 sals
.sals
= &pending_sal
;
5578 throw_exception (e
);
5585 /* Create a chain of things that always need to be cleaned up. */
5586 old_chain
= make_cleanup (null_cleanup
, 0);
5590 /* Make sure that all storage allocated to SALS gets freed. */
5591 make_cleanup (xfree
, sals
.sals
);
5593 /* Cleanup the addr_string array but not its contents. */
5594 make_cleanup (xfree
, addr_string
);
5597 /* ----------------------------- SNIP -----------------------------
5598 Anything added to the cleanup chain beyond this point is assumed
5599 to be part of a breakpoint. If the breakpoint create succeeds
5600 then the memory is not reclaimed. */
5601 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5603 /* Mark the contents of the addr_string for cleanup. These go on
5604 the breakpoint_chain and only occure if the breakpoint create
5606 for (i
= 0; i
< sals
.nelts
; i
++)
5608 if (addr_string
[i
] != NULL
)
5609 make_cleanup (xfree
, addr_string
[i
]);
5612 /* Resolve all line numbers to PC's and verify that the addresses
5613 are ok for the target. */
5615 breakpoint_sals_to_pc (&sals
, addr_start
);
5617 /* Verify that condition can be parsed, before setting any
5618 breakpoints. Allocate a separate condition expression for each
5622 if (parse_condition_and_thread
)
5624 /* Here we only parse 'arg' to separate condition
5625 from thread number, so parsing in context of first
5626 sal is OK. When setting the breakpoint we'll
5627 re-parse it in context of each sal. */
5630 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5632 make_cleanup (xfree
, cond_string
);
5636 /* Create a private copy of condition string. */
5639 cond_string
= xstrdup (cond_string
);
5640 make_cleanup (xfree
, cond_string
);
5643 create_breakpoints (sals
, addr_string
, cond_string
,
5644 hardwareflag
? bp_hardware_breakpoint
5646 tempflag
? disp_del
: disp_donttouch
,
5647 thread
, ignore_count
, ops
, from_tty
);
5651 struct symtab_and_line sal
= {0};
5652 struct breakpoint
*b
;
5654 make_cleanup (xfree
, copy_arg
);
5656 b
= set_raw_breakpoint_without_location (hardwareflag
5657 ? bp_hardware_breakpoint
5659 set_breakpoint_count (breakpoint_count
+ 1);
5660 b
->number
= breakpoint_count
;
5662 b
->addr_string
= addr_string
[0];
5663 b
->cond_string
= NULL
;
5664 b
->ignore_count
= ignore_count
;
5665 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5666 b
->condition_not_parsed
= 1;
5669 update_global_location_list (1);
5674 warning (_("Multiple breakpoints were set.\n"
5675 "Use the \"delete\" command to delete unwanted breakpoints."));
5676 /* That's it. Discard the cleanups for data inserted into the
5678 discard_cleanups (breakpoint_chain
);
5679 /* But cleanup everything else. */
5680 do_cleanups (old_chain
);
5683 /* Set a breakpoint.
5684 ARG is a string describing breakpoint address,
5685 condition, and thread.
5686 FLAG specifies if a breakpoint is hardware on,
5687 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5691 break_command_1 (char *arg
, int flag
, int from_tty
)
5693 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5694 int tempflag
= flag
& BP_TEMPFLAG
;
5696 break_command_really (arg
,
5697 NULL
, 0, 1 /* parse arg */,
5698 tempflag
, hardwareflag
,
5699 0 /* Ignore count */,
5700 pending_break_support
,
5701 NULL
/* breakpoint_ops */,
5707 set_breakpoint (char *address
, char *condition
,
5708 int hardwareflag
, int tempflag
,
5709 int thread
, int ignore_count
,
5712 break_command_really (address
, condition
, thread
,
5713 0 /* condition and thread are valid. */,
5714 tempflag
, hardwareflag
,
5717 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5721 /* Adjust SAL to the first instruction past the function prologue.
5722 The end of the prologue is determined using the line table from
5723 the debugging information.
5725 If SAL is already past the prologue, then do nothing. */
5728 skip_prologue_sal (struct symtab_and_line
*sal
)
5730 struct symbol
*sym
= find_pc_function (sal
->pc
);
5731 struct symtab_and_line start_sal
;
5736 start_sal
= find_function_start_sal (sym
, 1);
5737 if (sal
->pc
< start_sal
.pc
)
5741 /* Helper function for break_command_1 and disassemble_command. */
5744 resolve_sal_pc (struct symtab_and_line
*sal
)
5748 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5750 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5751 error (_("No line %d in file \"%s\"."),
5752 sal
->line
, sal
->symtab
->filename
);
5755 /* If this SAL corresponds to a breakpoint inserted using
5756 a line number, then skip the function prologue if necessary. */
5757 if (sal
->explicit_line
)
5758 skip_prologue_sal (sal
);
5761 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5763 struct blockvector
*bv
;
5767 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5770 sym
= block_linkage_function (b
);
5773 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5774 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
5778 /* It really is worthwhile to have the section, so we'll just
5779 have to look harder. This case can be executed if we have
5780 line numbers but no functions (as can happen in assembly
5783 struct minimal_symbol
*msym
;
5785 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5787 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
5794 break_command (char *arg
, int from_tty
)
5796 break_command_1 (arg
, 0, from_tty
);
5800 tbreak_command (char *arg
, int from_tty
)
5802 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5806 hbreak_command (char *arg
, int from_tty
)
5808 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5812 thbreak_command (char *arg
, int from_tty
)
5814 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5818 stop_command (char *arg
, int from_tty
)
5820 printf_filtered (_("Specify the type of breakpoint to set.\n\
5821 Usage: stop in <function | address>\n\
5822 stop at <line>\n"));
5826 stopin_command (char *arg
, int from_tty
)
5830 if (arg
== (char *) NULL
)
5832 else if (*arg
!= '*')
5837 /* look for a ':'. If this is a line number specification, then
5838 say it is bad, otherwise, it should be an address or
5839 function/method name */
5840 while (*argptr
&& !hasColon
)
5842 hasColon
= (*argptr
== ':');
5847 badInput
= (*argptr
!= ':'); /* Not a class::method */
5849 badInput
= isdigit (*arg
); /* a simple line number */
5853 printf_filtered (_("Usage: stop in <function | address>\n"));
5855 break_command_1 (arg
, 0, from_tty
);
5859 stopat_command (char *arg
, int from_tty
)
5863 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5870 /* look for a ':'. If there is a '::' then get out, otherwise
5871 it is probably a line number. */
5872 while (*argptr
&& !hasColon
)
5874 hasColon
= (*argptr
== ':');
5879 badInput
= (*argptr
== ':'); /* we have class::method */
5881 badInput
= !isdigit (*arg
); /* not a line number */
5885 printf_filtered (_("Usage: stop at <line>\n"));
5887 break_command_1 (arg
, 0, from_tty
);
5890 /* accessflag: hw_write: watch write,
5891 hw_read: watch read,
5892 hw_access: watch access (read or write) */
5894 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5896 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
5897 struct symtab_and_line sal
;
5898 struct expression
*exp
;
5899 struct block
*exp_valid_block
;
5900 struct value
*val
, *mark
;
5901 struct frame_info
*frame
;
5902 struct frame_info
*prev_frame
= NULL
;
5903 char *exp_start
= NULL
;
5904 char *exp_end
= NULL
;
5905 char *tok
, *id_tok_start
, *end_tok
;
5907 char *cond_start
= NULL
;
5908 char *cond_end
= NULL
;
5909 struct expression
*cond
= NULL
;
5910 int i
, other_type_used
, target_resources_ok
= 0;
5911 enum bptype bp_type
;
5915 init_sal (&sal
); /* initialize to zeroes */
5917 /* Make sure that we actually have parameters to parse. */
5918 if (arg
!= NULL
&& arg
[0] != '\0')
5920 toklen
= strlen (arg
); /* Size of argument list. */
5922 /* Points tok to the end of the argument list. */
5923 tok
= arg
+ toklen
- 1;
5925 /* Go backwards in the parameters list. Skip the last parameter.
5926 If we're expecting a 'thread <thread_num>' parameter, this should
5927 be the thread identifier. */
5928 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5930 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5933 /* Points end_tok to the beginning of the last token. */
5934 id_tok_start
= tok
+ 1;
5936 /* Go backwards in the parameters list. Skip one more parameter.
5937 If we're expecting a 'thread <thread_num>' parameter, we should
5938 reach a "thread" token. */
5939 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5944 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5947 /* Move the pointer forward to skip the whitespace and
5948 calculate the length of the token. */
5950 toklen
= end_tok
- tok
;
5952 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5954 /* At this point we've found a "thread" token, which means
5955 the user is trying to set a watchpoint that triggers
5956 only in a specific thread. */
5959 /* Extract the thread ID from the next token. */
5960 thread
= strtol (id_tok_start
, &endp
, 0);
5962 /* Check if the user provided a valid numeric value for the
5964 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
5965 error (_("Invalid thread ID specification %s."), id_tok_start
);
5967 /* Check if the thread actually exists. */
5968 if (!valid_thread_id (thread
))
5969 error (_("Unknown thread %d."), thread
);
5971 /* Truncate the string and get rid of the thread <thread_num>
5972 parameter before the parameter list is parsed by the
5973 evaluate_expression() function. */
5978 /* Parse the rest of the arguments. */
5979 innermost_block
= NULL
;
5981 exp
= parse_exp_1 (&arg
, 0, 0);
5983 exp_valid_block
= innermost_block
;
5984 mark
= value_mark ();
5985 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
5987 release_value (val
);
5990 while (*tok
== ' ' || *tok
== '\t')
5994 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5997 toklen
= end_tok
- tok
;
5998 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
6000 tok
= cond_start
= end_tok
+ 1;
6001 cond
= parse_exp_1 (&tok
, 0, 0);
6005 error (_("Junk at end of command."));
6007 if (accessflag
== hw_read
)
6008 bp_type
= bp_read_watchpoint
;
6009 else if (accessflag
== hw_access
)
6010 bp_type
= bp_access_watchpoint
;
6012 bp_type
= bp_hardware_watchpoint
;
6014 mem_cnt
= can_use_hardware_watchpoint (val
);
6015 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
6016 error (_("Expression cannot be implemented with read/access watchpoint."));
6019 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
6020 target_resources_ok
=
6021 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
6023 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
6024 error (_("Target does not support this type of hardware watchpoint."));
6026 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
6027 error (_("Target can only support one kind of HW watchpoint at a time."));
6030 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
6031 watchpoint could not be set. */
6032 if (!mem_cnt
|| target_resources_ok
<= 0)
6033 bp_type
= bp_watchpoint
;
6035 frame
= block_innermost_frame (exp_valid_block
);
6037 prev_frame
= get_prev_frame (frame
);
6041 /* If the expression is "local", then set up a "watchpoint scope"
6042 breakpoint at the point where we've left the scope of the watchpoint
6043 expression. Create the scope breakpoint before the watchpoint, so
6044 that we will encounter it first in bpstat_stop_status. */
6045 if (innermost_block
&& prev_frame
)
6047 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
6048 bp_watchpoint_scope
);
6050 scope_breakpoint
->enable_state
= bp_enabled
;
6052 /* Automatically delete the breakpoint when it hits. */
6053 scope_breakpoint
->disposition
= disp_del
;
6055 /* Only break in the proper frame (help with recursion). */
6056 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
6058 /* Set the address at which we will stop. */
6059 scope_breakpoint
->loc
->requested_address
6060 = get_frame_pc (prev_frame
);
6061 scope_breakpoint
->loc
->address
6062 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
6063 scope_breakpoint
->type
);
6066 /* Now set up the breakpoint. */
6067 b
= set_raw_breakpoint (sal
, bp_type
);
6068 set_breakpoint_count (breakpoint_count
+ 1);
6069 b
->number
= breakpoint_count
;
6071 b
->disposition
= disp_donttouch
;
6073 b
->exp_valid_block
= exp_valid_block
;
6074 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6077 b
->loc
->cond
= cond
;
6079 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6084 b
->watchpoint_frame
= get_frame_id (frame
);
6086 b
->watchpoint_frame
= null_frame_id
;
6088 if (scope_breakpoint
!= NULL
)
6090 /* The scope breakpoint is related to the watchpoint. We will
6091 need to act on them together. */
6092 b
->related_breakpoint
= scope_breakpoint
;
6093 scope_breakpoint
->related_breakpoint
= b
;
6096 value_free_to_mark (mark
);
6098 update_global_location_list (1);
6101 /* Return count of locations need to be watched and can be handled
6102 in hardware. If the watchpoint can not be handled
6103 in hardware return zero. */
6106 can_use_hardware_watchpoint (struct value
*v
)
6108 int found_memory_cnt
= 0;
6109 struct value
*head
= v
;
6111 /* Did the user specifically forbid us to use hardware watchpoints? */
6112 if (!can_use_hw_watchpoints
)
6115 /* Make sure that the value of the expression depends only upon
6116 memory contents, and values computed from them within GDB. If we
6117 find any register references or function calls, we can't use a
6118 hardware watchpoint.
6120 The idea here is that evaluating an expression generates a series
6121 of values, one holding the value of every subexpression. (The
6122 expression a*b+c has five subexpressions: a, b, a*b, c, and
6123 a*b+c.) GDB's values hold almost enough information to establish
6124 the criteria given above --- they identify memory lvalues,
6125 register lvalues, computed values, etcetera. So we can evaluate
6126 the expression, and then scan the chain of values that leaves
6127 behind to decide whether we can detect any possible change to the
6128 expression's final value using only hardware watchpoints.
6130 However, I don't think that the values returned by inferior
6131 function calls are special in any way. So this function may not
6132 notice that an expression involving an inferior function call
6133 can't be watched with hardware watchpoints. FIXME. */
6134 for (; v
; v
= value_next (v
))
6136 if (VALUE_LVAL (v
) == lval_memory
)
6139 /* A lazy memory lvalue is one that GDB never needed to fetch;
6140 we either just used its address (e.g., `a' in `a.b') or
6141 we never needed it at all (e.g., `a' in `a,b'). */
6145 /* Ahh, memory we actually used! Check if we can cover
6146 it with hardware watchpoints. */
6147 struct type
*vtype
= check_typedef (value_type (v
));
6149 /* We only watch structs and arrays if user asked for it
6150 explicitly, never if they just happen to appear in a
6151 middle of some value chain. */
6153 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6154 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6156 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
6157 int len
= TYPE_LENGTH (value_type (v
));
6159 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6166 else if (VALUE_LVAL (v
) != not_lval
6167 && deprecated_value_modifiable (v
) == 0)
6168 return 0; /* ??? What does this represent? */
6169 else if (VALUE_LVAL (v
) == lval_register
)
6170 return 0; /* cannot watch a register with a HW watchpoint */
6173 /* The expression itself looks suitable for using a hardware
6174 watchpoint, but give the target machine a chance to reject it. */
6175 return found_memory_cnt
;
6179 watch_command_wrapper (char *arg
, int from_tty
)
6181 watch_command (arg
, from_tty
);
6185 watch_command (char *arg
, int from_tty
)
6187 watch_command_1 (arg
, hw_write
, from_tty
);
6191 rwatch_command_wrapper (char *arg
, int from_tty
)
6193 rwatch_command (arg
, from_tty
);
6197 rwatch_command (char *arg
, int from_tty
)
6199 watch_command_1 (arg
, hw_read
, from_tty
);
6203 awatch_command_wrapper (char *arg
, int from_tty
)
6205 awatch_command (arg
, from_tty
);
6209 awatch_command (char *arg
, int from_tty
)
6211 watch_command_1 (arg
, hw_access
, from_tty
);
6215 /* Helper routines for the until_command routine in infcmd.c. Here
6216 because it uses the mechanisms of breakpoints. */
6218 struct until_break_command_continuation_args
6220 struct breakpoint
*breakpoint
;
6221 struct breakpoint
*breakpoint2
;
6224 /* This function is called by fetch_inferior_event via the
6225 cmd_continuation pointer, to complete the until command. It takes
6226 care of cleaning up the temporary breakpoints set up by the until
6229 until_break_command_continuation (void *arg
)
6231 struct until_break_command_continuation_args
*a
= arg
;
6233 delete_breakpoint (a
->breakpoint
);
6235 delete_breakpoint (a
->breakpoint2
);
6239 until_break_command (char *arg
, int from_tty
, int anywhere
)
6241 struct symtabs_and_lines sals
;
6242 struct symtab_and_line sal
;
6243 struct frame_info
*frame
= get_selected_frame (NULL
);
6244 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6245 struct breakpoint
*breakpoint
;
6246 struct breakpoint
*breakpoint2
= NULL
;
6247 struct cleanup
*old_chain
;
6249 clear_proceed_status ();
6251 /* Set a breakpoint where the user wants it and at return from
6254 if (default_breakpoint_valid
)
6255 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6256 default_breakpoint_line
, (char ***) NULL
, NULL
);
6258 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6259 0, (char ***) NULL
, NULL
);
6261 if (sals
.nelts
!= 1)
6262 error (_("Couldn't get information on specified line."));
6265 xfree (sals
.sals
); /* malloc'd, so freed */
6268 error (_("Junk at end of arguments."));
6270 resolve_sal_pc (&sal
);
6273 /* If the user told us to continue until a specified location,
6274 we don't specify a frame at which we need to stop. */
6275 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6277 /* Otherwise, specify the current frame, because we want to stop only
6278 at the very same frame. */
6279 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6282 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6284 /* Keep within the current frame, or in frames called by the current
6288 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6289 sal
.pc
= get_frame_pc (prev_frame
);
6290 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6292 make_cleanup_delete_breakpoint (breakpoint2
);
6295 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6297 /* If we are running asynchronously, and proceed call above has actually
6298 managed to start the target, arrange for breakpoints to be
6299 deleted when the target stops. Otherwise, we're already stopped and
6300 delete breakpoints via cleanup chain. */
6302 if (target_can_async_p () && is_running (inferior_ptid
))
6304 struct until_break_command_continuation_args
*args
;
6305 args
= xmalloc (sizeof (*args
));
6307 args
->breakpoint
= breakpoint
;
6308 args
->breakpoint2
= breakpoint2
;
6310 discard_cleanups (old_chain
);
6311 add_continuation (until_break_command_continuation
, args
,
6315 do_cleanups (old_chain
);
6319 ep_skip_leading_whitespace (char **s
)
6321 if ((s
== NULL
) || (*s
== NULL
))
6323 while (isspace (**s
))
6327 /* This function attempts to parse an optional "if <cond>" clause
6328 from the arg string. If one is not found, it returns NULL.
6330 Else, it returns a pointer to the condition string. (It does not
6331 attempt to evaluate the string against a particular block.) And,
6332 it updates arg to point to the first character following the parsed
6333 if clause in the arg string. */
6336 ep_parse_optional_if_clause (char **arg
)
6340 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6343 /* Skip the "if" keyword. */
6346 /* Skip any extra leading whitespace, and record the start of the
6347 condition string. */
6348 ep_skip_leading_whitespace (arg
);
6351 /* Assume that the condition occupies the remainder of the arg string. */
6352 (*arg
) += strlen (cond_string
);
6357 /* This function attempts to parse an optional filename from the arg
6358 string. If one is not found, it returns NULL.
6360 Else, it returns a pointer to the parsed filename. (This function
6361 makes no attempt to verify that a file of that name exists, or is
6362 accessible.) And, it updates arg to point to the first character
6363 following the parsed filename in the arg string.
6365 Note that clients needing to preserve the returned filename for
6366 future access should copy it to their own buffers. */
6368 ep_parse_optional_filename (char **arg
)
6370 static char filename
[1024];
6375 if ((*arg_p
== '\0') || isspace (*arg_p
))
6393 /* Commands to deal with catching events, such as signals, exceptions,
6394 process start/exit, etc. */
6398 catch_fork_temporary
, catch_vfork_temporary
,
6399 catch_fork_permanent
, catch_vfork_permanent
6404 catch_fork_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6406 char *cond_string
= NULL
;
6407 catch_fork_kind fork_kind
;
6410 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
6411 tempflag
= (fork_kind
== catch_fork_temporary
6412 || fork_kind
== catch_vfork_temporary
);
6416 ep_skip_leading_whitespace (&arg
);
6418 /* The allowed syntax is:
6420 catch [v]fork if <cond>
6422 First, check if there's an if clause. */
6423 cond_string
= ep_parse_optional_if_clause (&arg
);
6425 if ((*arg
!= '\0') && !isspace (*arg
))
6426 error (_("Junk at end of arguments."));
6428 /* If this target supports it, create a fork or vfork catchpoint
6429 and enable reporting of such events. */
6432 case catch_fork_temporary
:
6433 case catch_fork_permanent
:
6434 create_fork_event_catchpoint (tempflag
, cond_string
);
6436 case catch_vfork_temporary
:
6437 case catch_vfork_permanent
:
6438 create_vfork_event_catchpoint (tempflag
, cond_string
);
6441 error (_("unsupported or unknown fork kind; cannot catch it"));
6447 catch_exec_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6450 char *cond_string
= NULL
;
6452 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6456 ep_skip_leading_whitespace (&arg
);
6458 /* The allowed syntax is:
6460 catch exec if <cond>
6462 First, check if there's an if clause. */
6463 cond_string
= ep_parse_optional_if_clause (&arg
);
6465 if ((*arg
!= '\0') && !isspace (*arg
))
6466 error (_("Junk at end of arguments."));
6468 /* If this target supports it, create an exec catchpoint
6469 and enable reporting of such events. */
6470 create_exec_event_catchpoint (tempflag
, cond_string
);
6474 catch_load_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6477 char *dll_pathname
= NULL
;
6478 char *cond_string
= NULL
;
6480 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6484 ep_skip_leading_whitespace (&arg
);
6486 /* The allowed syntax is:
6488 catch load if <cond>
6489 catch load <filename>
6490 catch load <filename> if <cond>
6492 The user is not allowed to specify the <filename> after an
6495 We'll ignore the pathological case of a file named "if".
6497 First, check if there's an if clause. If so, then there
6498 cannot be a filename. */
6499 cond_string
= ep_parse_optional_if_clause (&arg
);
6501 /* If there was an if clause, then there cannot be a filename.
6502 Else, there might be a filename and an if clause. */
6503 if (cond_string
== NULL
)
6505 dll_pathname
= ep_parse_optional_filename (&arg
);
6506 ep_skip_leading_whitespace (&arg
);
6507 cond_string
= ep_parse_optional_if_clause (&arg
);
6510 if ((*arg
!= '\0') && !isspace (*arg
))
6511 error (_("Junk at end of arguments."));
6513 /* Create a load breakpoint that only triggers when a load of
6514 the specified dll (or any dll, if no pathname was specified)
6516 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6517 dll_pathname
, cond_string
);
6521 catch_unload_command_1 (char *arg
, int from_tty
,
6522 struct cmd_list_element
*command
)
6525 char *dll_pathname
= NULL
;
6526 char *cond_string
= NULL
;
6528 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6532 ep_skip_leading_whitespace (&arg
);
6534 /* The allowed syntax is:
6536 catch unload if <cond>
6537 catch unload <filename>
6538 catch unload <filename> if <cond>
6540 The user is not allowed to specify the <filename> after an
6543 We'll ignore the pathological case of a file named "if".
6545 First, check if there's an if clause. If so, then there
6546 cannot be a filename. */
6547 cond_string
= ep_parse_optional_if_clause (&arg
);
6549 /* If there was an if clause, then there cannot be a filename.
6550 Else, there might be a filename and an if clause. */
6551 if (cond_string
== NULL
)
6553 dll_pathname
= ep_parse_optional_filename (&arg
);
6554 ep_skip_leading_whitespace (&arg
);
6555 cond_string
= ep_parse_optional_if_clause (&arg
);
6558 if ((*arg
!= '\0') && !isspace (*arg
))
6559 error (_("Junk at end of arguments."));
6561 /* Create an unload breakpoint that only triggers when an unload of
6562 the specified dll (or any dll, if no pathname was specified)
6564 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6565 dll_pathname
, cond_string
);
6568 static enum print_stop_action
6569 print_exception_catchpoint (struct breakpoint
*b
)
6571 int bp_temp
, bp_throw
;
6573 annotate_catchpoint (b
->number
);
6575 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6576 if (b
->loc
->address
!= b
->loc
->requested_address
)
6577 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6580 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6582 bp_temp
? "Temporary catchpoint "
6584 if (!ui_out_is_mi_like_p (uiout
))
6585 ui_out_field_int (uiout
, "bkptno", b
->number
);
6587 bp_throw
? " (exception thrown), "
6588 : " (exception caught), ");
6589 if (ui_out_is_mi_like_p (uiout
))
6591 ui_out_field_string (uiout
, "reason",
6592 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6593 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6594 ui_out_field_int (uiout
, "bkptno", b
->number
);
6596 return PRINT_SRC_AND_LOC
;
6600 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6605 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6606 ui_out_field_string (uiout
, "addr", "<PENDING>");
6608 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6612 *last_addr
= b
->loc
->address
;
6613 if (strstr (b
->addr_string
, "throw") != NULL
)
6614 ui_out_field_string (uiout
, "what", "exception throw");
6616 ui_out_field_string (uiout
, "what", "exception catch");
6620 print_mention_exception_catchpoint (struct breakpoint
*b
)
6625 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6626 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6627 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6628 : _("Catchpoint "));
6629 ui_out_field_int (uiout
, "bkptno", b
->number
);
6630 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6634 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6635 print_exception_catchpoint
,
6636 print_one_exception_catchpoint
,
6637 print_mention_exception_catchpoint
6641 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6642 enum exception_event_kind ex_event
, int from_tty
)
6644 char *trigger_func_name
;
6646 if (ex_event
== EX_EVENT_CATCH
)
6647 trigger_func_name
= "__cxa_begin_catch";
6649 trigger_func_name
= "__cxa_throw";
6651 break_command_really (trigger_func_name
, cond_string
, -1,
6652 0 /* condition and thread are valid. */,
6655 AUTO_BOOLEAN_TRUE
/* pending */,
6656 &gnu_v3_exception_catchpoint_ops
, from_tty
);
6661 /* Deal with "catch catch" and "catch throw" commands */
6664 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6665 int tempflag
, int from_tty
)
6667 char *cond_string
= NULL
;
6668 struct symtab_and_line
*sal
= NULL
;
6672 ep_skip_leading_whitespace (&arg
);
6674 cond_string
= ep_parse_optional_if_clause (&arg
);
6676 if ((*arg
!= '\0') && !isspace (*arg
))
6677 error (_("Junk at end of arguments."));
6679 if ((ex_event
!= EX_EVENT_THROW
) &&
6680 (ex_event
!= EX_EVENT_CATCH
))
6681 error (_("Unsupported or unknown exception event; cannot catch it"));
6683 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6686 warning (_("Unsupported with this platform/compiler combination."));
6689 /* Implementation of "catch catch" command. */
6692 catch_catch_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6694 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6695 catch_exception_command_1 (EX_EVENT_CATCH
, arg
, tempflag
, from_tty
);
6698 /* Implementation of "catch throw" command. */
6701 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6703 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6704 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
6707 /* Create a breakpoint struct for Ada exception catchpoints. */
6710 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6714 struct expression
*cond
,
6715 struct breakpoint_ops
*ops
,
6719 struct breakpoint
*b
;
6723 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6724 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6725 version for exception catchpoints, because two catchpoints
6726 used for different exception names will use the same address.
6727 In this case, a "breakpoint ... also set at..." warning is
6728 unproductive. Besides. the warning phrasing is also a bit
6729 inapropriate, we should use the word catchpoint, and tell
6730 the user what type of catchpoint it is. The above is good
6731 enough for now, though. */
6734 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6735 set_breakpoint_count (breakpoint_count
+ 1);
6737 b
->enable_state
= bp_enabled
;
6738 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6739 b
->number
= breakpoint_count
;
6740 b
->ignore_count
= 0;
6741 b
->loc
->cond
= cond
;
6742 b
->addr_string
= addr_string
;
6743 b
->language
= language_ada
;
6744 b
->cond_string
= cond_string
;
6745 b
->exp_string
= exp_string
;
6750 update_global_location_list (1);
6753 /* Implement the "catch exception" command. */
6756 catch_ada_exception_command (char *arg
, int from_tty
,
6757 struct cmd_list_element
*command
)
6760 struct symtab_and_line sal
;
6762 char *addr_string
= NULL
;
6763 char *exp_string
= NULL
;
6764 char *cond_string
= NULL
;
6765 struct expression
*cond
= NULL
;
6766 struct breakpoint_ops
*ops
= NULL
;
6768 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6772 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6773 &cond_string
, &cond
, &ops
);
6774 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6775 cond_string
, cond
, ops
, tempflag
,
6779 /* Implement the "catch assert" command. */
6782 catch_assert_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6785 struct symtab_and_line sal
;
6786 char *addr_string
= NULL
;
6787 struct breakpoint_ops
*ops
= NULL
;
6789 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6793 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6794 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6795 tempflag
, from_tty
);
6799 catch_command (char *arg
, int from_tty
)
6801 error (_("Catch requires an event name."));
6806 tcatch_command (char *arg
, int from_tty
)
6808 error (_("Catch requires an event name."));
6811 /* Delete breakpoints by address or line. */
6814 clear_command (char *arg
, int from_tty
)
6816 struct breakpoint
*b
;
6817 VEC(breakpoint_p
) *found
= 0;
6820 struct symtabs_and_lines sals
;
6821 struct symtab_and_line sal
;
6826 sals
= decode_line_spec (arg
, 1);
6831 sals
.sals
= (struct symtab_and_line
*)
6832 xmalloc (sizeof (struct symtab_and_line
));
6833 make_cleanup (xfree
, sals
.sals
);
6834 init_sal (&sal
); /* initialize to zeroes */
6835 sal
.line
= default_breakpoint_line
;
6836 sal
.symtab
= default_breakpoint_symtab
;
6837 sal
.pc
= default_breakpoint_address
;
6838 if (sal
.symtab
== 0)
6839 error (_("No source file specified."));
6847 /* We don't call resolve_sal_pc here. That's not
6848 as bad as it seems, because all existing breakpoints
6849 typically have both file/line and pc set. So, if
6850 clear is given file/line, we can match this to existing
6851 breakpoint without obtaining pc at all.
6853 We only support clearing given the address explicitly
6854 present in breakpoint table. Say, we've set breakpoint
6855 at file:line. There were several PC values for that file:line,
6856 due to optimization, all in one block.
6857 We've picked one PC value. If "clear" is issued with another
6858 PC corresponding to the same file:line, the breakpoint won't
6859 be cleared. We probably can still clear the breakpoint, but
6860 since the other PC value is never presented to user, user
6861 can only find it by guessing, and it does not seem important
6864 /* For each line spec given, delete bps which correspond
6865 to it. Do it in two passes, solely to preserve the current
6866 behavior that from_tty is forced true if we delete more than
6870 for (i
= 0; i
< sals
.nelts
; i
++)
6872 /* If exact pc given, clear bpts at that pc.
6873 If line given (pc == 0), clear all bpts on specified line.
6874 If defaulting, clear all bpts on default line
6877 defaulting sal.pc != 0 tests to do
6882 1 0 <can't happen> */
6886 /* Find all matching breakpoints and add them to
6891 /* Are we going to delete b? */
6892 if (b
->type
!= bp_none
6893 && b
->type
!= bp_watchpoint
6894 && b
->type
!= bp_hardware_watchpoint
6895 && b
->type
!= bp_read_watchpoint
6896 && b
->type
!= bp_access_watchpoint
)
6898 struct bp_location
*loc
= b
->loc
;
6899 for (; loc
; loc
= loc
->next
)
6901 int pc_match
= sal
.pc
6902 && (loc
->address
== sal
.pc
)
6903 && (!section_is_overlay (loc
->section
)
6904 || loc
->section
== sal
.section
);
6905 int line_match
= ((default_match
|| (0 == sal
.pc
))
6906 && b
->source_file
!= NULL
6907 && sal
.symtab
!= NULL
6908 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6909 && b
->line_number
== sal
.line
);
6910 if (pc_match
|| line_match
)
6919 VEC_safe_push(breakpoint_p
, found
, b
);
6922 /* Now go thru the 'found' chain and delete them. */
6923 if (VEC_empty(breakpoint_p
, found
))
6926 error (_("No breakpoint at %s."), arg
);
6928 error (_("No breakpoint at this line."));
6931 if (VEC_length(breakpoint_p
, found
) > 1)
6932 from_tty
= 1; /* Always report if deleted more than one */
6935 if (VEC_length(breakpoint_p
, found
) == 1)
6936 printf_unfiltered (_("Deleted breakpoint "));
6938 printf_unfiltered (_("Deleted breakpoints "));
6940 breakpoints_changed ();
6942 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6945 printf_unfiltered ("%d ", b
->number
);
6946 delete_breakpoint (b
);
6949 putchar_unfiltered ('\n');
6952 /* Delete breakpoint in BS if they are `delete' breakpoints and
6953 all breakpoints that are marked for deletion, whether hit or not.
6954 This is called after any breakpoint is hit, or after errors. */
6957 breakpoint_auto_delete (bpstat bs
)
6959 struct breakpoint
*b
, *temp
;
6961 for (; bs
; bs
= bs
->next
)
6962 if (bs
->breakpoint_at
6963 && bs
->breakpoint_at
->owner
6964 && bs
->breakpoint_at
->owner
->disposition
== disp_del
6966 delete_breakpoint (bs
->breakpoint_at
->owner
);
6968 ALL_BREAKPOINTS_SAFE (b
, temp
)
6970 if (b
->disposition
== disp_del_at_next_stop
)
6971 delete_breakpoint (b
);
6975 /* If SHOULD_INSERT is true, do not insert any breakpoint locations
6976 into the inferior, only remove already-inserted locations that no
6977 longer should be inserted. Functions that delete a breakpoint or
6978 breakpoints should pass false, so that deleting a breakpoint
6979 doesn't have the side effect of inserting the locations of other
6980 breakpoints that are marked not-inserted, but should_be_inserted
6981 returns true on them.
6983 This behaviour is useful is situations close to tear-down -- e.g.,
6984 after an exec, while the target still has execution, but breakpoint
6985 shadows of the previous executable image should *NOT* be restored
6986 to the new image; or before detaching, where the target still has
6987 execution and wants to delete breakpoints from GDB's lists, and all
6988 breakpoints had already been removed from the inferior. */
6991 update_global_location_list (int should_insert
)
6993 struct breakpoint
*b
;
6994 struct bp_location
**next
= &bp_location_chain
;
6995 struct bp_location
*loc
;
6996 struct bp_location
*loc2
;
6997 struct gdb_exception e
;
6998 VEC(bp_location_p
) *old_locations
= NULL
;
7002 /* Store old locations for future reference. */
7003 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
7004 VEC_safe_push (bp_location_p
, old_locations
, loc
);
7006 bp_location_chain
= NULL
;
7009 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
7012 next
= &(loc
->global_next
);
7017 /* Identify bp_location instances that are no longer present in the new
7018 list, and therefore should be freed. Note that it's not necessary that
7019 those locations should be removed from inferior -- if there's another
7020 location at the same address (previously marked as duplicate),
7021 we don't need to remove/insert the location. */
7022 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
7024 /* Tells if 'loc' is found amoung the new locations. If not, we
7026 int found_object
= 0;
7027 /* Tells if the location should remain inserted in the target. */
7028 int keep_in_target
= 0;
7030 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7037 /* If this location is no longer present, and inserted, look if there's
7038 maybe a new location at the same address. If so, mark that one
7039 inserted, and don't remove this one. This is needed so that we
7040 don't have a time window where a breakpoint at certain location is not
7045 /* If the location is inserted now, we might have to remove it. */
7047 if (found_object
&& should_be_inserted (loc
))
7049 /* The location is still present in the location list, and still
7050 should be inserted. Don't do anything. */
7055 /* The location is either no longer present, or got disabled.
7056 See if there's another location at the same address, in which
7057 case we don't need to remove this one from the target. */
7058 if (breakpoint_address_is_meaningful (loc
->owner
))
7059 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7061 /* For the sake of should_insert_location. The
7062 call to check_duplicates will fix up this later. */
7063 loc2
->duplicate
= 0;
7064 if (should_be_inserted (loc2
)
7065 && loc2
!= loc
&& loc2
->address
== loc
->address
)
7068 loc2
->target_info
= loc
->target_info
;
7075 if (!keep_in_target
)
7077 if (remove_breakpoint (loc
, mark_uninserted
))
7079 /* This is just about all we can do. We could keep this
7080 location on the global list, and try to remove it next
7081 time, but there's no particular reason why we will
7084 Note that at this point, loc->owner is still valid,
7085 as delete_breakpoint frees the breakpoint only
7086 after calling us. */
7087 printf_filtered (_("warning: Error removing breakpoint %d\n"),
7088 loc
->owner
->number
);
7098 /* This location was removed from the targets. In non-stop mode,
7099 a race condition is possible where we've removed a breakpoint,
7100 but stop events for that breakpoint are already queued and will
7101 arrive later. To suppress spurious SIGTRAPs reported to user,
7102 we keep this breakpoint location for a bit, and will retire it
7103 after we see 3 * thread_count events.
7104 The theory here is that reporting of events should,
7105 "on the average", be fair, so after that many event we'll see
7106 events from all threads that have anything of interest, and no
7107 longer need to keep this breakpoint. This is just a
7108 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7109 which is usability issue, but not a correctness problem. */
7110 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7114 free_bp_location (loc
);
7120 check_duplicates (b
);
7123 if (breakpoints_always_inserted_mode ()
7125 && target_has_execution
)
7126 insert_breakpoint_locations ();
7130 breakpoint_retire_moribund (void)
7132 struct bp_location
*loc
;
7135 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7136 if (--(loc
->events_till_retirement
) == 0)
7138 free_bp_location (loc
);
7139 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7145 update_global_location_list_nothrow (int inserting
)
7147 struct gdb_exception e
;
7148 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7149 update_global_location_list (inserting
);
7152 /* Clear BPT from a BPS. */
7154 bpstat_remove_breakpoint (bpstat bps
, struct breakpoint
*bpt
)
7157 for (bs
= bps
; bs
; bs
= bs
->next
)
7158 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7160 bs
->breakpoint_at
= NULL
;
7162 /* bs->commands will be freed later. */
7166 /* Callback for iterate_over_threads. */
7168 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
7170 struct breakpoint
*bpt
= data
;
7171 bpstat_remove_breakpoint (th
->stop_bpstat
, bpt
);
7175 /* Delete a breakpoint and clean up all traces of it in the data
7179 delete_breakpoint (struct breakpoint
*bpt
)
7181 struct breakpoint
*b
;
7182 struct bp_location
*loc
, *next
;
7184 gdb_assert (bpt
!= NULL
);
7186 /* Has this bp already been deleted? This can happen because multiple
7187 lists can hold pointers to bp's. bpstat lists are especial culprits.
7189 One example of this happening is a watchpoint's scope bp. When the
7190 scope bp triggers, we notice that the watchpoint is out of scope, and
7191 delete it. We also delete its scope bp. But the scope bp is marked
7192 "auto-deleting", and is already on a bpstat. That bpstat is then
7193 checked for auto-deleting bp's, which are deleted.
7195 A real solution to this problem might involve reference counts in bp's,
7196 and/or giving them pointers back to their referencing bpstat's, and
7197 teaching delete_breakpoint to only free a bp's storage when no more
7198 references were extent. A cheaper bandaid was chosen. */
7199 if (bpt
->type
== bp_none
)
7202 observer_notify_breakpoint_deleted (bpt
->number
);
7204 if (breakpoint_chain
== bpt
)
7205 breakpoint_chain
= bpt
->next
;
7210 b
->next
= bpt
->next
;
7214 free_command_lines (&bpt
->commands
);
7215 if (bpt
->cond_string
!= NULL
)
7216 xfree (bpt
->cond_string
);
7217 if (bpt
->addr_string
!= NULL
)
7218 xfree (bpt
->addr_string
);
7219 if (bpt
->exp
!= NULL
)
7221 if (bpt
->exp_string
!= NULL
)
7222 xfree (bpt
->exp_string
);
7223 if (bpt
->val
!= NULL
)
7224 value_free (bpt
->val
);
7225 if (bpt
->source_file
!= NULL
)
7226 xfree (bpt
->source_file
);
7227 if (bpt
->dll_pathname
!= NULL
)
7228 xfree (bpt
->dll_pathname
);
7229 if (bpt
->triggered_dll_pathname
!= NULL
)
7230 xfree (bpt
->triggered_dll_pathname
);
7231 if (bpt
->exec_pathname
!= NULL
)
7232 xfree (bpt
->exec_pathname
);
7234 /* Be sure no bpstat's are pointing at it after it's been freed. */
7235 /* FIXME, how can we find all bpstat's?
7236 We just check stop_bpstat for now. Note that we cannot just
7237 remove bpstats pointing at bpt from the stop_bpstat list
7238 entirely, as breakpoint commands are associated with the bpstat;
7239 if we remove it here, then the later call to
7240 bpstat_do_actions (&stop_bpstat);
7241 in event-top.c won't do anything, and temporary breakpoints
7242 with commands won't work. */
7244 /* Clear the current context. */
7245 bpstat_remove_breakpoint (stop_bpstat
, bpt
);
7246 /* And from all threads. */
7247 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
7249 /* Now that breakpoint is removed from breakpoint
7250 list, update the global location list. This
7251 will remove locations that used to belong to
7252 this breakpoint. Do this before freeing
7253 the breakpoint itself, since remove_breakpoint
7254 looks at location's owner. It might be better
7255 design to have location completely self-contained,
7256 but it's not the case now. */
7257 update_global_location_list (0);
7260 /* On the chance that someone will soon try again to delete this same
7261 bp, we mark it as deleted before freeing its storage. */
7262 bpt
->type
= bp_none
;
7268 do_delete_breakpoint_cleanup (void *b
)
7270 delete_breakpoint (b
);
7274 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7276 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7280 delete_command (char *arg
, int from_tty
)
7282 struct breakpoint
*b
, *temp
;
7288 int breaks_to_delete
= 0;
7290 /* Delete all breakpoints if no argument.
7291 Do not delete internal or call-dummy breakpoints, these
7292 have to be deleted with an explicit breakpoint number argument. */
7295 if (b
->type
!= bp_call_dummy
&&
7296 b
->type
!= bp_shlib_event
&&
7297 b
->type
!= bp_thread_event
&&
7298 b
->type
!= bp_overlay_event
&&
7301 breaks_to_delete
= 1;
7306 /* Ask user only if there are some breakpoints to delete. */
7308 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7310 ALL_BREAKPOINTS_SAFE (b
, temp
)
7312 if (b
->type
!= bp_call_dummy
&&
7313 b
->type
!= bp_shlib_event
&&
7314 b
->type
!= bp_thread_event
&&
7315 b
->type
!= bp_overlay_event
&&
7317 delete_breakpoint (b
);
7322 map_breakpoint_numbers (arg
, delete_breakpoint
);
7326 all_locations_are_pending (struct bp_location
*loc
)
7328 for (; loc
; loc
= loc
->next
)
7329 if (!loc
->shlib_disabled
)
7334 /* Subroutine of update_breakpoint_locations to simplify it.
7335 Return non-zero if multiple fns in list LOC have the same name.
7336 Null names are ignored. */
7339 ambiguous_names_p (struct bp_location
*loc
)
7341 struct bp_location
*l
;
7342 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7343 (int (*) (const void *, const void *)) streq
,
7344 NULL
, xcalloc
, xfree
);
7346 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7349 const char *name
= l
->function_name
;
7351 /* Allow for some names to be NULL, ignore them. */
7355 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7357 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7372 update_breakpoint_locations (struct breakpoint
*b
,
7373 struct symtabs_and_lines sals
)
7377 struct bp_location
*existing_locations
= b
->loc
;
7379 /* If there's no new locations, and all existing locations
7380 are pending, don't do anything. This optimizes
7381 the common case where all locations are in the same
7382 shared library, that was unloaded. We'd like to
7383 retain the location, so that when the library
7384 is loaded again, we don't loose the enabled/disabled
7385 status of the individual locations. */
7386 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7391 for (i
= 0; i
< sals
.nelts
; ++i
)
7393 struct bp_location
*new_loc
=
7394 add_location_to_breakpoint (b
, b
->type
, &(sals
.sals
[i
]));
7396 /* Reparse conditions, they might contain references to the
7398 if (b
->cond_string
!= NULL
)
7400 struct gdb_exception e
;
7403 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7405 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7410 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7411 b
->number
, e
.message
);
7412 new_loc
->enabled
= 0;
7416 if (b
->source_file
!= NULL
)
7417 xfree (b
->source_file
);
7418 if (sals
.sals
[i
].symtab
== NULL
)
7419 b
->source_file
= NULL
;
7422 savestring (sals
.sals
[i
].symtab
->filename
,
7423 strlen (sals
.sals
[i
].symtab
->filename
));
7425 if (b
->line_number
== 0)
7426 b
->line_number
= sals
.sals
[i
].line
;
7429 /* Update locations of permanent breakpoints. */
7430 if (b
->enable_state
== bp_permanent
)
7431 make_breakpoint_permanent (b
);
7433 /* If possible, carry over 'disable' status from existing breakpoints. */
7435 struct bp_location
*e
= existing_locations
;
7436 /* If there are multiple breakpoints with the same function name,
7437 e.g. for inline functions, comparing function names won't work.
7438 Instead compare pc addresses; this is just a heuristic as things
7439 may have moved, but in practice it gives the correct answer
7440 often enough until a better solution is found. */
7441 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7443 for (; e
; e
= e
->next
)
7445 if (!e
->enabled
&& e
->function_name
)
7447 struct bp_location
*l
= b
->loc
;
7448 if (have_ambiguous_names
)
7450 for (; l
; l
= l
->next
)
7451 if (e
->address
== l
->address
)
7459 for (; l
; l
= l
->next
)
7460 if (l
->function_name
7461 && strcmp (e
->function_name
, l
->function_name
) == 0)
7471 update_global_location_list (1);
7475 /* Reset a breakpoint given it's struct breakpoint * BINT.
7476 The value we return ends up being the return value from catch_errors.
7477 Unused in this case. */
7480 breakpoint_re_set_one (void *bint
)
7482 /* get past catch_errs */
7483 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7487 int *not_found_ptr
= ¬_found
;
7488 struct symtabs_and_lines sals
= {};
7489 struct symtabs_and_lines expanded
;
7491 enum enable_state save_enable
;
7492 struct gdb_exception e
;
7498 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7502 case bp_hardware_breakpoint
:
7504 case bp_catch_unload
:
7505 if (b
->addr_string
== NULL
)
7507 /* Anything without a string can't be re-set. */
7508 delete_breakpoint (b
);
7512 set_language (b
->language
);
7513 input_radix
= b
->input_radix
;
7515 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7517 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7522 int not_found_and_ok
= 0;
7523 /* For pending breakpoints, it's expected that parsing
7524 will fail until the right shared library is loaded.
7525 User has already told to create pending breakpoints and
7526 don't need extra messages. If breakpoint is in bp_shlib_disabled
7527 state, then user already saw the message about that breakpoint
7528 being disabled, and don't want to see more errors. */
7530 && (b
->condition_not_parsed
7531 || (b
->loc
&& b
->loc
->shlib_disabled
)
7532 || b
->enable_state
== bp_disabled
))
7533 not_found_and_ok
= 1;
7535 if (!not_found_and_ok
)
7537 /* We surely don't want to warn about the same breakpoint
7538 10 times. One solution, implemented here, is disable
7539 the breakpoint on error. Another solution would be to
7540 have separate 'warning emitted' flag. Since this
7541 happens only when a binary has changed, I don't know
7542 which approach is better. */
7543 b
->enable_state
= bp_disabled
;
7544 throw_exception (e
);
7551 gdb_assert (sals
.nelts
== 1);
7552 resolve_sal_pc (&sals
.sals
[0]);
7553 if (b
->condition_not_parsed
&& s
&& s
[0])
7555 char *cond_string
= 0;
7557 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7558 &cond_string
, &thread
);
7560 b
->cond_string
= cond_string
;
7562 b
->condition_not_parsed
= 0;
7564 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7565 update_breakpoint_locations (b
, expanded
);
7571 case bp_hardware_watchpoint
:
7572 case bp_read_watchpoint
:
7573 case bp_access_watchpoint
:
7574 /* Watchpoint can be either on expression using entirely global variables,
7575 or it can be on local variables.
7577 Watchpoints of the first kind are never auto-deleted, and even persist
7578 across program restarts. Since they can use variables from shared
7579 libraries, we need to reparse expression as libraries are loaded
7582 Watchpoints on local variables can also change meaning as result
7583 of solib event. For example, if a watchpoint uses both a local and
7584 a global variables in expression, it's a local watchpoint, but
7585 unloading of a shared library will make the expression invalid.
7586 This is not a very common use case, but we still re-evaluate
7587 expression, to avoid surprises to the user.
7589 Note that for local watchpoints, we re-evaluate it only if
7590 watchpoints frame id is still valid. If it's not, it means
7591 the watchpoint is out of scope and will be deleted soon. In fact,
7592 I'm not sure we'll ever be called in this case.
7594 If a local watchpoint's frame id is still valid, then
7595 b->exp_valid_block is likewise valid, and we can safely use it.
7597 Don't do anything about disabled watchpoints, since they will
7598 be reevaluated again when enabled. */
7599 update_watchpoint (b
, 1 /* reparse */);
7601 /* We needn't really do anything to reset these, since the mask
7602 that requests them is unaffected by e.g., new libraries being
7605 case bp_catch_vfork
:
7610 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7612 /* Delete overlay event breakpoints; they will be reset later by
7613 breakpoint_re_set. */
7614 case bp_overlay_event
:
7615 delete_breakpoint (b
);
7618 /* This breakpoint is special, it's set up when the inferior
7619 starts and we really don't want to touch it. */
7620 case bp_shlib_event
:
7622 /* Like bp_shlib_event, this breakpoint type is special.
7623 Once it is set up, we do not want to touch it. */
7624 case bp_thread_event
:
7626 /* Keep temporary breakpoints, which can be encountered when we step
7627 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7628 Otherwise these should have been blown away via the cleanup chain
7629 or by breakpoint_init_inferior when we rerun the executable. */
7632 case bp_watchpoint_scope
:
7634 case bp_step_resume
:
7636 case bp_longjmp_resume
:
7643 /* Re-set all breakpoints after symbols have been re-loaded. */
7645 breakpoint_re_set (void)
7647 struct breakpoint
*b
, *temp
;
7648 enum language save_language
;
7649 int save_input_radix
;
7651 save_language
= current_language
->la_language
;
7652 save_input_radix
= input_radix
;
7653 ALL_BREAKPOINTS_SAFE (b
, temp
)
7655 /* Format possible error msg */
7656 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7658 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7659 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7660 do_cleanups (cleanups
);
7662 set_language (save_language
);
7663 input_radix
= save_input_radix
;
7665 create_overlay_event_breakpoint ("_ovly_debug_event");
7668 /* Reset the thread number of this breakpoint:
7670 - If the breakpoint is for all threads, leave it as-is.
7671 - Else, reset it to the current thread for inferior_ptid. */
7673 breakpoint_re_set_thread (struct breakpoint
*b
)
7675 if (b
->thread
!= -1)
7677 if (in_thread_list (inferior_ptid
))
7678 b
->thread
= pid_to_thread_id (inferior_ptid
);
7682 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7683 If from_tty is nonzero, it prints a message to that effect,
7684 which ends with a period (no newline). */
7687 set_ignore_count (int bptnum
, int count
, int from_tty
)
7689 struct breakpoint
*b
;
7695 if (b
->number
== bptnum
)
7697 b
->ignore_count
= count
;
7701 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7703 else if (count
== 1)
7704 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7707 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7710 breakpoints_changed ();
7711 observer_notify_breakpoint_modified (b
->number
);
7715 error (_("No breakpoint number %d."), bptnum
);
7718 /* Clear the ignore counts of all breakpoints. */
7720 breakpoint_clear_ignore_counts (void)
7722 struct breakpoint
*b
;
7725 b
->ignore_count
= 0;
7728 /* Command to set ignore-count of breakpoint N to COUNT. */
7731 ignore_command (char *args
, int from_tty
)
7737 error_no_arg (_("a breakpoint number"));
7739 num
= get_number (&p
);
7741 error (_("bad breakpoint number: '%s'"), args
);
7743 error (_("Second argument (specified ignore-count) is missing."));
7745 set_ignore_count (num
,
7746 longest_to_int (value_as_long (parse_and_eval (p
))),
7749 printf_filtered ("\n");
7752 /* Call FUNCTION on each of the breakpoints
7753 whose numbers are given in ARGS. */
7756 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7761 struct breakpoint
*b
, *tmp
;
7765 error_no_arg (_("one or more breakpoint numbers"));
7772 num
= get_number_or_range (&p1
);
7775 warning (_("bad breakpoint number at or near '%s'"), p
);
7779 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7780 if (b
->number
== num
)
7782 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7785 if (related_breakpoint
)
7786 function (related_breakpoint
);
7790 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7796 static struct bp_location
*
7797 find_location_by_number (char *number
)
7799 char *dot
= strchr (number
, '.');
7803 struct breakpoint
*b
;
7804 struct bp_location
*loc
;
7809 bp_num
= get_number_or_range (&p1
);
7811 error (_("Bad breakpoint number '%s'"), number
);
7814 if (b
->number
== bp_num
)
7819 if (!b
|| b
->number
!= bp_num
)
7820 error (_("Bad breakpoint number '%s'"), number
);
7823 loc_num
= get_number_or_range (&p1
);
7825 error (_("Bad breakpoint location number '%s'"), number
);
7829 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7832 error (_("Bad breakpoint location number '%s'"), dot
+1);
7838 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7839 If from_tty is nonzero, it prints a message to that effect,
7840 which ends with a period (no newline). */
7843 disable_breakpoint (struct breakpoint
*bpt
)
7845 /* Never disable a watchpoint scope breakpoint; we want to
7846 hit them when we leave scope so we can delete both the
7847 watchpoint and its scope breakpoint at that time. */
7848 if (bpt
->type
== bp_watchpoint_scope
)
7851 /* You can't disable permanent breakpoints. */
7852 if (bpt
->enable_state
== bp_permanent
)
7855 bpt
->enable_state
= bp_disabled
;
7857 update_global_location_list (0);
7859 observer_notify_breakpoint_modified (bpt
->number
);
7863 disable_command (char *args
, int from_tty
)
7865 struct breakpoint
*bpt
;
7867 ALL_BREAKPOINTS (bpt
)
7871 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7876 case bp_catch_unload
:
7878 case bp_catch_vfork
:
7880 case bp_hardware_breakpoint
:
7882 case bp_hardware_watchpoint
:
7883 case bp_read_watchpoint
:
7884 case bp_access_watchpoint
:
7885 disable_breakpoint (bpt
);
7889 else if (strchr (args
, '.'))
7891 struct bp_location
*loc
= find_location_by_number (args
);
7894 update_global_location_list (0);
7897 map_breakpoint_numbers (args
, disable_breakpoint
);
7901 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7903 int target_resources_ok
, other_type_used
;
7906 if (bpt
->type
== bp_hardware_breakpoint
)
7909 i
= hw_breakpoint_used_count ();
7910 target_resources_ok
=
7911 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7913 if (target_resources_ok
== 0)
7914 error (_("No hardware breakpoint support in the target."));
7915 else if (target_resources_ok
< 0)
7916 error (_("Hardware breakpoints used exceeds limit."));
7919 if (bpt
->type
== bp_watchpoint
||
7920 bpt
->type
== bp_hardware_watchpoint
||
7921 bpt
->type
== bp_read_watchpoint
||
7922 bpt
->type
== bp_access_watchpoint
)
7924 struct frame_id saved_frame_id
;
7926 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7927 if (bpt
->exp_valid_block
!= NULL
)
7929 struct frame_info
*fr
=
7930 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7933 printf_filtered (_("\
7934 Cannot enable watchpoint %d because the block in which its expression\n\
7935 is valid is not currently in scope.\n"), bpt
->number
);
7942 value_free (bpt
->val
);
7943 mark
= value_mark ();
7944 fetch_watchpoint_value (bpt
->exp
, &bpt
->val
, NULL
, NULL
);
7946 release_value (bpt
->val
);
7949 if (bpt
->type
== bp_hardware_watchpoint
||
7950 bpt
->type
== bp_read_watchpoint
||
7951 bpt
->type
== bp_access_watchpoint
)
7953 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7954 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7956 /* Hack around 'unused var' error for some targets here */
7957 (void) mem_cnt
, (void) i
;
7958 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7959 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7960 /* we can consider of type is bp_hardware_watchpoint, convert to
7961 bp_watchpoint in the following condition */
7962 if (target_resources_ok
< 0)
7964 printf_filtered (_("\
7965 Cannot enable watchpoint %d because target watch resources\n\
7966 have been allocated for other watchpoints.\n"), bpt
->number
);
7967 value_free_to_mark (mark
);
7972 select_frame (frame_find_by_id (saved_frame_id
));
7973 value_free_to_mark (mark
);
7976 if (bpt
->enable_state
!= bp_permanent
)
7977 bpt
->enable_state
= bp_enabled
;
7978 bpt
->disposition
= disposition
;
7979 update_global_location_list (1);
7980 breakpoints_changed ();
7982 observer_notify_breakpoint_modified (bpt
->number
);
7987 enable_breakpoint (struct breakpoint
*bpt
)
7989 do_enable_breakpoint (bpt
, bpt
->disposition
);
7992 /* The enable command enables the specified breakpoints (or all defined
7993 breakpoints) so they once again become (or continue to be) effective
7994 in stopping the inferior. */
7997 enable_command (char *args
, int from_tty
)
7999 struct breakpoint
*bpt
;
8001 ALL_BREAKPOINTS (bpt
)
8005 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
8010 case bp_catch_unload
:
8012 case bp_catch_vfork
:
8014 case bp_hardware_breakpoint
:
8016 case bp_hardware_watchpoint
:
8017 case bp_read_watchpoint
:
8018 case bp_access_watchpoint
:
8019 enable_breakpoint (bpt
);
8023 else if (strchr (args
, '.'))
8025 struct bp_location
*loc
= find_location_by_number (args
);
8028 update_global_location_list (1);
8031 map_breakpoint_numbers (args
, enable_breakpoint
);
8035 enable_once_breakpoint (struct breakpoint
*bpt
)
8037 do_enable_breakpoint (bpt
, disp_disable
);
8041 enable_once_command (char *args
, int from_tty
)
8043 map_breakpoint_numbers (args
, enable_once_breakpoint
);
8047 enable_delete_breakpoint (struct breakpoint
*bpt
)
8049 do_enable_breakpoint (bpt
, disp_del
);
8053 enable_delete_command (char *args
, int from_tty
)
8055 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
8059 set_breakpoint_cmd (char *args
, int from_tty
)
8064 show_breakpoint_cmd (char *args
, int from_tty
)
8068 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
8070 struct symtabs_and_lines
8071 decode_line_spec_1 (char *string
, int funfirstline
)
8073 struct symtabs_and_lines sals
;
8075 error (_("Empty line specification."));
8076 if (default_breakpoint_valid
)
8077 sals
= decode_line_1 (&string
, funfirstline
,
8078 default_breakpoint_symtab
,
8079 default_breakpoint_line
,
8080 (char ***) NULL
, NULL
);
8082 sals
= decode_line_1 (&string
, funfirstline
,
8083 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
8085 error (_("Junk at end of line specification: %s"), string
);
8089 /* Create and insert a raw software breakpoint at PC. Return an
8090 identifier, which should be used to remove the breakpoint later.
8091 In general, places which call this should be using something on the
8092 breakpoint chain instead; this function should be eliminated
8096 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
8098 struct bp_target_info
*bp_tgt
;
8100 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
8101 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
8103 bp_tgt
->placed_address
= pc
;
8104 if (target_insert_breakpoint (bp_tgt
) != 0)
8106 /* Could not insert the breakpoint. */
8114 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
8117 deprecated_remove_raw_breakpoint (void *bp
)
8119 struct bp_target_info
*bp_tgt
= bp
;
8122 ret
= target_remove_breakpoint (bp_tgt
);
8128 /* One (or perhaps two) breakpoints used for software single stepping. */
8130 static void *single_step_breakpoints
[2];
8132 /* Create and insert a breakpoint for software single step. */
8135 insert_single_step_breakpoint (CORE_ADDR next_pc
)
8139 if (single_step_breakpoints
[0] == NULL
)
8140 bpt_p
= &single_step_breakpoints
[0];
8143 gdb_assert (single_step_breakpoints
[1] == NULL
);
8144 bpt_p
= &single_step_breakpoints
[1];
8147 /* NOTE drow/2006-04-11: A future improvement to this function would be
8148 to only create the breakpoints once, and actually put them on the
8149 breakpoint chain. That would let us use set_raw_breakpoint. We could
8150 adjust the addresses each time they were needed. Doing this requires
8151 corresponding changes elsewhere where single step breakpoints are
8152 handled, however. So, for now, we use this. */
8154 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
8156 error (_("Could not insert single-step breakpoint at 0x%s"),
8157 paddr_nz (next_pc
));
8160 /* Remove and delete any breakpoints used for software single step. */
8163 remove_single_step_breakpoints (void)
8165 gdb_assert (single_step_breakpoints
[0] != NULL
);
8167 /* See insert_single_step_breakpoint for more about this deprecated
8169 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8170 single_step_breakpoints
[0] = NULL
;
8172 if (single_step_breakpoints
[1] != NULL
)
8174 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8175 single_step_breakpoints
[1] = NULL
;
8179 /* Check whether a software single-step breakpoint is inserted at PC. */
8182 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8186 for (i
= 0; i
< 2; i
++)
8188 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8189 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8197 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8198 It is defined as a macro to prevent duplication.
8199 COMMAND should be a string constant containing the name of the command. */
8200 #define BREAK_ARGS_HELP(command) \
8201 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8202 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8203 If a line number is specified, break at start of code for that line.\n\
8204 If a function is specified, break at start of code for that function.\n\
8205 If an address is specified, break at that exact address.\n\
8206 With no LOCATION, uses current execution address of selected stack frame.\n\
8207 This is useful for breaking on return to a stack frame.\n\
8209 THREADNUM is the number from \"info threads\".\n\
8210 CONDITION is a boolean expression.\n\
8212 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8214 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8216 /* List of subcommands for "catch". */
8217 static struct cmd_list_element
*catch_cmdlist
;
8219 /* List of subcommands for "tcatch". */
8220 static struct cmd_list_element
*tcatch_cmdlist
;
8222 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
8223 lists, and pass some additional user data to the command function. */
8225 add_catch_command (char *name
, char *docstring
,
8226 void (*sfunc
) (char *args
, int from_tty
,
8227 struct cmd_list_element
*command
),
8228 void *user_data_catch
,
8229 void *user_data_tcatch
)
8231 struct cmd_list_element
*command
;
8233 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8235 set_cmd_sfunc (command
, sfunc
);
8236 set_cmd_context (command
, user_data_catch
);
8238 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8240 set_cmd_sfunc (command
, sfunc
);
8241 set_cmd_context (command
, user_data_tcatch
);
8245 _initialize_breakpoint (void)
8247 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8248 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8249 struct cmd_list_element
*c
;
8251 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8253 breakpoint_chain
= 0;
8254 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8255 before a breakpoint is set. */
8256 breakpoint_count
= 0;
8258 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8259 Set ignore-count of breakpoint number N to COUNT.\n\
8260 Usage is `ignore N COUNT'."));
8262 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8264 add_com ("commands", class_breakpoint
, commands_command
, _("\
8265 Set commands to be executed when a breakpoint is hit.\n\
8266 Give breakpoint number as argument after \"commands\".\n\
8267 With no argument, the targeted breakpoint is the last one set.\n\
8268 The commands themselves follow starting on the next line.\n\
8269 Type a line containing \"end\" to indicate the end of them.\n\
8270 Give \"silent\" as the first line to make the breakpoint silent;\n\
8271 then no output is printed when it is hit, except what the commands print."));
8273 add_com ("condition", class_breakpoint
, condition_command
, _("\
8274 Specify breakpoint number N to break only if COND is true.\n\
8275 Usage is `condition N COND', where N is an integer and COND is an\n\
8276 expression to be evaluated whenever breakpoint N is reached."));
8278 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8279 Set a temporary breakpoint.\n\
8280 Like \"break\" except the breakpoint is only temporary,\n\
8281 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8282 by using \"enable delete\" on the breakpoint number.\n\
8284 BREAK_ARGS_HELP ("tbreak")));
8285 set_cmd_completer (c
, location_completer
);
8287 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8288 Set a hardware assisted breakpoint.\n\
8289 Like \"break\" except the breakpoint requires hardware support,\n\
8290 some target hardware may not have this support.\n\
8292 BREAK_ARGS_HELP ("hbreak")));
8293 set_cmd_completer (c
, location_completer
);
8295 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8296 Set a temporary hardware assisted breakpoint.\n\
8297 Like \"hbreak\" except the breakpoint is only temporary,\n\
8298 so it will be deleted when hit.\n\
8300 BREAK_ARGS_HELP ("thbreak")));
8301 set_cmd_completer (c
, location_completer
);
8303 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8304 Enable some breakpoints.\n\
8305 Give breakpoint numbers (separated by spaces) as arguments.\n\
8306 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8307 This is used to cancel the effect of the \"disable\" command.\n\
8308 With a subcommand you can enable temporarily."),
8309 &enablelist
, "enable ", 1, &cmdlist
);
8311 add_com ("ab", class_breakpoint
, enable_command
, _("\
8312 Enable some breakpoints.\n\
8313 Give breakpoint numbers (separated by spaces) as arguments.\n\
8314 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8315 This is used to cancel the effect of the \"disable\" command.\n\
8316 With a subcommand you can enable temporarily."));
8318 add_com_alias ("en", "enable", class_breakpoint
, 1);
8320 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8321 Enable some breakpoints.\n\
8322 Give breakpoint numbers (separated by spaces) as arguments.\n\
8323 This is used to cancel the effect of the \"disable\" command.\n\
8324 May be abbreviated to simply \"enable\".\n"),
8325 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8327 add_cmd ("once", no_class
, enable_once_command
, _("\
8328 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8329 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8332 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8333 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8334 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8337 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8338 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8339 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8342 add_cmd ("once", no_class
, enable_once_command
, _("\
8343 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8344 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8347 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8348 Disable some breakpoints.\n\
8349 Arguments are breakpoint numbers with spaces in between.\n\
8350 To disable all breakpoints, give no argument.\n\
8351 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8352 &disablelist
, "disable ", 1, &cmdlist
);
8353 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8354 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8356 add_com ("sb", class_breakpoint
, disable_command
, _("\
8357 Disable some breakpoints.\n\
8358 Arguments are breakpoint numbers with spaces in between.\n\
8359 To disable all breakpoints, give no argument.\n\
8360 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8362 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8363 Disable some breakpoints.\n\
8364 Arguments are breakpoint numbers with spaces in between.\n\
8365 To disable all breakpoints, give no argument.\n\
8366 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8367 This command may be abbreviated \"disable\"."),
8370 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8371 Delete some breakpoints or auto-display expressions.\n\
8372 Arguments are breakpoint numbers with spaces in between.\n\
8373 To delete all breakpoints, give no argument.\n\
8375 Also a prefix command for deletion of other GDB objects.\n\
8376 The \"unset\" command is also an alias for \"delete\"."),
8377 &deletelist
, "delete ", 1, &cmdlist
);
8378 add_com_alias ("d", "delete", class_breakpoint
, 1);
8379 add_com_alias ("del", "delete", class_breakpoint
, 1);
8381 add_com ("db", class_breakpoint
, delete_command
, _("\
8382 Delete some breakpoints.\n\
8383 Arguments are breakpoint numbers with spaces in between.\n\
8384 To delete all breakpoints, give no argument.\n"));
8386 add_cmd ("breakpoints", class_alias
, 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\
8390 This command may be abbreviated \"delete\"."),
8393 add_com ("clear", class_breakpoint
, clear_command
, _("\
8394 Clear breakpoint at specified line or function.\n\
8395 Argument may be line number, function name, or \"*\" and an address.\n\
8396 If line number is specified, all breakpoints in that line are cleared.\n\
8397 If function is specified, breakpoints at beginning of function are cleared.\n\
8398 If an address is specified, breakpoints at that address are cleared.\n\
8400 With no argument, clears all breakpoints in the line that the selected frame\n\
8403 See also the \"delete\" command which clears breakpoints by number."));
8405 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8406 Set breakpoint at specified line or function.\n"
8407 BREAK_ARGS_HELP ("break")));
8408 set_cmd_completer (c
, location_completer
);
8410 add_com_alias ("b", "break", class_run
, 1);
8411 add_com_alias ("br", "break", class_run
, 1);
8412 add_com_alias ("bre", "break", class_run
, 1);
8413 add_com_alias ("brea", "break", class_run
, 1);
8417 add_com_alias ("ba", "break", class_breakpoint
, 1);
8418 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8423 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8424 Break in function/address or break at a line in the current file."),
8425 &stoplist
, "stop ", 1, &cmdlist
);
8426 add_cmd ("in", class_breakpoint
, stopin_command
,
8427 _("Break in function or address."), &stoplist
);
8428 add_cmd ("at", class_breakpoint
, stopat_command
,
8429 _("Break at a line in the current file."), &stoplist
);
8430 add_com ("status", class_info
, breakpoints_info
, _("\
8431 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8432 The \"Type\" column indicates one of:\n\
8433 \tbreakpoint - normal breakpoint\n\
8434 \twatchpoint - watchpoint\n\
8435 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8436 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8437 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8438 address and file/line number respectively.\n\
8440 Convenience variable \"$_\" and default examine address for \"x\"\n\
8441 are set to the address of the last breakpoint listed unless the command\n\
8442 is prefixed with \"server \".\n\n\
8443 Convenience variable \"$bpnum\" contains the number of the last\n\
8447 add_info ("breakpoints", breakpoints_info
, _("\
8448 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8449 The \"Type\" column indicates one of:\n\
8450 \tbreakpoint - normal breakpoint\n\
8451 \twatchpoint - watchpoint\n\
8452 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8453 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8454 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8455 address and file/line number respectively.\n\
8457 Convenience variable \"$_\" and default examine address for \"x\"\n\
8458 are set to the address of the last breakpoint listed unless the command\n\
8459 is prefixed with \"server \".\n\n\
8460 Convenience variable \"$bpnum\" contains the number of the last\n\
8464 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8465 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8466 The \"Type\" column indicates one of:\n\
8467 \tbreakpoint - normal breakpoint\n\
8468 \twatchpoint - watchpoint\n\
8469 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8470 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8471 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8472 address and file/line number respectively.\n\
8474 Convenience variable \"$_\" and default examine address for \"x\"\n\
8475 are set to the address of the last breakpoint listed unless the command\n\
8476 is prefixed with \"server \".\n\n\
8477 Convenience variable \"$bpnum\" contains the number of the last\n\
8480 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8481 Status of all breakpoints, or breakpoint number NUMBER.\n\
8482 The \"Type\" column indicates one of:\n\
8483 \tbreakpoint - normal breakpoint\n\
8484 \twatchpoint - watchpoint\n\
8485 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8486 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8487 \tuntil - internal breakpoint used by the \"until\" command\n\
8488 \tfinish - internal breakpoint used by the \"finish\" command\n\
8489 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8490 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8491 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8492 address and file/line number respectively.\n\
8494 Convenience variable \"$_\" and default examine address for \"x\"\n\
8495 are set to the address of the last breakpoint listed unless the command\n\
8496 is prefixed with \"server \".\n\n\
8497 Convenience variable \"$bpnum\" contains the number of the last\n\
8499 &maintenanceinfolist
);
8501 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
8502 Set catchpoints to catch events."),
8503 &catch_cmdlist
, "catch ",
8504 0/*allow-unknown*/, &cmdlist
);
8506 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
8507 Set temporary catchpoints to catch events."),
8508 &tcatch_cmdlist
, "tcatch ",
8509 0/*allow-unknown*/, &cmdlist
);
8511 /* Add catch and tcatch sub-commands. */
8512 add_catch_command ("catch", _("\
8513 Catch an exception, when caught.\n\
8514 With an argument, catch only exceptions with the given name."),
8515 catch_catch_command
,
8518 add_catch_command ("throw", _("\
8519 Catch an exception, when thrown.\n\
8520 With an argument, catch only exceptions with the given name."),
8521 catch_throw_command
,
8524 add_catch_command ("fork", _("Catch calls to fork."),
8525 catch_fork_command_1
,
8526 (void *) (uintptr_t) catch_fork_permanent
,
8527 (void *) (uintptr_t) catch_fork_temporary
);
8528 add_catch_command ("vfork", _("Catch calls to vfork."),
8529 catch_fork_command_1
,
8530 (void *) (uintptr_t) catch_vfork_permanent
,
8531 (void *) (uintptr_t) catch_vfork_temporary
);
8532 add_catch_command ("exec", _("Catch calls to exec."),
8533 catch_exec_command_1
,
8536 add_catch_command ("load", _("\
8537 Catch library loads.\n\
8538 With an argument, catch only loads of that library."),
8539 catch_load_command_1
,
8542 add_catch_command ("unload", _("\
8543 Catch library unloads.\n\
8544 With an argument, catch only unloads of that library."),
8545 catch_unload_command_1
,
8548 add_catch_command ("exception", _("\
8549 Catch Ada exceptions, when raised.\n\
8550 With an argument, catch only exceptions with the given name."),
8551 catch_ada_exception_command
,
8554 add_catch_command ("assert", _("\
8555 Catch failed Ada assertions, when raised.\n\
8556 With an argument, catch only exceptions with the given name."),
8557 catch_assert_command
,
8561 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8562 Set a watchpoint for an expression.\n\
8563 A watchpoint stops execution of your program whenever the value of\n\
8564 an expression changes."));
8565 set_cmd_completer (c
, expression_completer
);
8567 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8568 Set a read watchpoint for an expression.\n\
8569 A watchpoint stops execution of your program whenever the value of\n\
8570 an expression is read."));
8571 set_cmd_completer (c
, expression_completer
);
8573 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8574 Set a watchpoint for an expression.\n\
8575 A watchpoint stops execution of your program whenever the value of\n\
8576 an expression is either read or written."));
8577 set_cmd_completer (c
, expression_completer
);
8579 add_info ("watchpoints", breakpoints_info
,
8580 _("Synonym for ``info breakpoints''."));
8583 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8584 respond to changes - contrary to the description. */
8585 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8586 &can_use_hw_watchpoints
, _("\
8587 Set debugger's willingness to use watchpoint hardware."), _("\
8588 Show debugger's willingness to use watchpoint hardware."), _("\
8589 If zero, gdb will not use hardware for new watchpoints, even if\n\
8590 such is available. (However, any hardware watchpoints that were\n\
8591 created before setting this to nonzero, will continue to use watchpoint\n\
8594 show_can_use_hw_watchpoints
,
8595 &setlist
, &showlist
);
8597 can_use_hw_watchpoints
= 1;
8599 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8600 Breakpoint specific settings\n\
8601 Configure various breakpoint-specific variables such as\n\
8602 pending breakpoint behavior"),
8603 &breakpoint_set_cmdlist
, "set breakpoint ",
8604 0/*allow-unknown*/, &setlist
);
8605 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8606 Breakpoint specific settings\n\
8607 Configure various breakpoint-specific variables such as\n\
8608 pending breakpoint behavior"),
8609 &breakpoint_show_cmdlist
, "show breakpoint ",
8610 0/*allow-unknown*/, &showlist
);
8612 add_setshow_auto_boolean_cmd ("pending", no_class
,
8613 &pending_break_support
, _("\
8614 Set debugger's behavior regarding pending breakpoints."), _("\
8615 Show debugger's behavior regarding pending breakpoints."), _("\
8616 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8617 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8618 an error. If auto, an unrecognized breakpoint location results in a\n\
8619 user-query to see if a pending breakpoint should be created."),
8621 show_pending_break_support
,
8622 &breakpoint_set_cmdlist
,
8623 &breakpoint_show_cmdlist
);
8625 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8627 add_setshow_boolean_cmd ("auto-hw", no_class
,
8628 &automatic_hardware_breakpoints
, _("\
8629 Set automatic usage of hardware breakpoints."), _("\
8630 Show automatic usage of hardware breakpoints."), _("\
8631 If set, the debugger will automatically use hardware breakpoints for\n\
8632 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8633 a warning will be emitted for such breakpoints."),
8635 show_automatic_hardware_breakpoints
,
8636 &breakpoint_set_cmdlist
,
8637 &breakpoint_show_cmdlist
);
8639 add_setshow_enum_cmd ("always-inserted", class_support
,
8640 always_inserted_enums
, &always_inserted_mode
, _("\
8641 Set mode for inserting breakpoints."), _("\
8642 Show mode for inserting breakpoints."), _("\
8643 When this mode is off, breakpoints are inserted in inferior when it is\n\
8644 resumed, and removed when execution stops. When this mode is on,\n\
8645 breakpoints are inserted immediately and removed only when the user\n\
8646 deletes the breakpoint. When this mode is auto (which is the default),\n\
8647 the behaviour depends on the non-stop setting (see help set non-stop).\n\
8648 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
8649 behaves as if always-inserted mode is on; if gdb is controlling the\n\
8650 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
8652 &show_always_inserted_mode
,
8653 &breakpoint_set_cmdlist
,
8654 &breakpoint_show_cmdlist
);
8656 automatic_hardware_breakpoints
= 1;