1 /* Everything about breakpoints, for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "breakpoint.h"
29 #include "expression.h"
35 #include "gdbthread.h"
38 #include "gdb_string.h"
45 #include "completer.h"
48 #include "cli/cli-script.h"
49 #include "gdb_assert.h"
54 #include "exceptions.h"
60 #include "gdb-events.h"
61 #include "mi/mi-common.h"
63 #include "gdb_stdint.h"
65 /* Prototypes for local functions. */
67 static void until_break_command_continuation (struct continuation_arg
*arg
,
70 static void catch_command_1 (char *, int, int);
72 static void enable_delete_command (char *, int);
74 static void enable_delete_breakpoint (struct breakpoint
*);
76 static void enable_once_command (char *, int);
78 static void enable_once_breakpoint (struct breakpoint
*);
80 static void disable_command (char *, int);
82 static void enable_command (char *, int);
84 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
86 static void ignore_command (char *, int);
88 static int breakpoint_re_set_one (void *);
90 static void clear_command (char *, int);
92 static void catch_command (char *, int);
94 static void watch_command (char *, int);
96 static int can_use_hardware_watchpoint (struct value
*);
98 static void break_command_1 (char *, int, int);
100 static void mention (struct breakpoint
*);
102 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
104 static void check_duplicates (struct breakpoint
*);
106 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
108 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
111 static void describe_other_breakpoints (CORE_ADDR
, asection
*, int);
113 static void breakpoints_info (char *, int);
115 static void breakpoint_1 (int, int);
117 static bpstat
bpstat_alloc (const struct bp_location
*, bpstat
);
119 static int breakpoint_cond_eval (void *);
121 static void cleanup_executing_breakpoints (void *);
123 static void commands_command (char *, int);
125 static void condition_command (char *, int);
127 static int get_number_trailer (char **, int);
129 void set_breakpoint_count (int);
138 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
140 static enum print_stop_action
print_it_typical (bpstat
);
142 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
144 static int watchpoint_check (void *);
146 static void maintenance_info_breakpoints (char *, int);
148 static void create_longjmp_breakpoint (char *);
150 static void create_overlay_event_breakpoint (char *);
152 static int hw_breakpoint_used_count (void);
154 static int hw_watchpoint_used_count (enum bptype
, int *);
156 static void hbreak_command (char *, int);
158 static void thbreak_command (char *, int);
160 static void watch_command_1 (char *, int, int);
162 static void rwatch_command (char *, int);
164 static void awatch_command (char *, int);
166 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
168 static void create_fork_vfork_event_catchpoint (int tempflag
,
170 enum bptype bp_kind
);
172 static void stop_command (char *arg
, int from_tty
);
174 static void stopin_command (char *arg
, int from_tty
);
176 static void stopat_command (char *arg
, int from_tty
);
178 static char *ep_find_event_name_end (char *arg
);
180 static char *ep_parse_optional_if_clause (char **arg
);
182 static char *ep_parse_optional_filename (char **arg
);
184 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
185 char *arg
, int tempflag
, int from_tty
);
187 static void tcatch_command (char *arg
, int from_tty
);
189 static void ep_skip_leading_whitespace (char **s
);
191 static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc
);
193 static void free_bp_location (struct bp_location
*loc
);
195 static void mark_breakpoints_out (void);
197 static struct bp_location
*
198 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
);
200 static void update_global_location_list (void);
202 static void update_global_location_list_nothrow (void);
204 static int is_hardware_watchpoint (struct breakpoint
*bpt
);
206 static void insert_breakpoint_locations (void);
209 bpdisp_text (enum bpdisp disp
)
211 /* NOTE: the following values are a part of MI protocol and represent
212 values of 'disp' field returned when inferior stops at a breakpoint. */
213 static char *bpdisps
[] = {"del", "dstp", "dis", "keep"};
214 return bpdisps
[(int) disp
];
217 /* Prototypes for exported functions. */
218 /* If FALSE, gdb will not use hardware support for watchpoints, even
219 if such is available. */
220 static int can_use_hw_watchpoints
;
223 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
224 struct cmd_list_element
*c
,
227 fprintf_filtered (file
, _("\
228 Debugger's willingness to use watchpoint hardware is %s.\n"),
232 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
233 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
234 for unrecognized breakpoint locations.
235 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
236 static enum auto_boolean pending_break_support
;
238 show_pending_break_support (struct ui_file
*file
, int from_tty
,
239 struct cmd_list_element
*c
,
242 fprintf_filtered (file
, _("\
243 Debugger's behavior regarding pending breakpoints is %s.\n"),
247 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
248 set with "break" but falling in read-only memory.
249 If 0, gdb will warn about such breakpoints, but won't automatically
250 use hardware breakpoints. */
251 static int automatic_hardware_breakpoints
;
253 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
254 struct cmd_list_element
*c
,
257 fprintf_filtered (file
, _("\
258 Automatic usage of hardware breakpoints is %s.\n"),
262 /* If 1, gdb will keep breakpoints inserted even as inferior is stopped,
263 and immediately insert any new breakpoints. If 0, gdb will insert
264 breakpoints into inferior only when resuming it, and will remove
265 breakpoints upon stop. */
266 static int always_inserted_mode
= 0;
268 show_always_inserted_mode (struct ui_file
*file
, int from_tty
,
269 struct cmd_list_element
*c
, const char *value
)
271 fprintf_filtered (file
, _("Always inserted breakpoint mode is %s.\n"), value
);
275 void _initialize_breakpoint (void);
277 extern int addressprint
; /* Print machine addresses? */
279 /* Are we executing breakpoint commands? */
280 static int executing_breakpoint_commands
;
282 /* Are overlay event breakpoints enabled? */
283 static int overlay_events_enabled
;
285 /* Walk the following statement or block through all breakpoints.
286 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
289 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
291 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
292 for (B = breakpoint_chain; \
293 B ? (TMP=B->next, 1): 0; \
296 /* Similar iterators for the low-level breakpoints. */
298 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->global_next)
300 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
301 for (B = bp_location_chain; \
302 B ? (TMP=B->global_next, 1): 0; \
305 /* True if breakpoint hit counts should be displayed in breakpoint info. */
307 int show_breakpoint_hit_counts
= 1;
309 /* Chains of all breakpoints defined. */
311 struct breakpoint
*breakpoint_chain
;
313 struct bp_location
*bp_location_chain
;
315 /* Number of last breakpoint made. */
317 int breakpoint_count
;
319 /* This function returns a pointer to the string representation of the
320 pathname of the dynamically-linked library that has just been
323 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
324 or undefined results are guaranteed.
326 This string's contents are only valid immediately after the
327 inferior has stopped in the dynamic linker hook, and becomes
328 invalid as soon as the inferior is continued. Clients should make
329 a copy of this string if they wish to continue the inferior and
330 then access the string. */
332 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
333 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
336 /* This function returns a pointer to the string representation of the
337 pathname of the dynamically-linked library that has just been
340 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
341 TRUE, or undefined results are guaranteed.
343 This string's contents are only valid immediately after the
344 inferior has stopped in the dynamic linker hook, and becomes
345 invalid as soon as the inferior is continued. Clients should make
346 a copy of this string if they wish to continue the inferior and
347 then access the string. */
349 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
350 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
353 /* This function is called by the "catch load" command. It allows the
354 debugger to be notified by the dynamic linker when a specified
355 library file (or any library file, if filename is NULL) is loaded. */
357 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
358 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
359 error (_("catch of library loads not yet implemented on this platform"))
362 /* This function is called by the "catch unload" command. It allows
363 the debugger to be notified by the dynamic linker when a specified
364 library file (or any library file, if filename is NULL) is
367 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
368 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid, tempflag, filename, cond_string) \
369 error (_("catch of library unloads not yet implemented on this platform"))
372 /* Return whether a breakpoint is an active enabled breakpoint. */
374 breakpoint_enabled (struct breakpoint
*b
)
376 return (b
->enable_state
== bp_enabled
);
379 /* Set breakpoint count to NUM. */
382 set_breakpoint_count (int num
)
384 breakpoint_count
= num
;
385 set_internalvar (lookup_internalvar ("bpnum"),
386 value_from_longest (builtin_type_int
, (LONGEST
) num
));
389 /* Used in run_command to zero the hit count when a new run starts. */
392 clear_breakpoint_hit_counts (void)
394 struct breakpoint
*b
;
400 /* Default address, symtab and line to put a breakpoint at
401 for "break" command with no arg.
402 if default_breakpoint_valid is zero, the other three are
403 not valid, and "break" with no arg is an error.
405 This set by print_stack_frame, which calls set_default_breakpoint. */
407 int default_breakpoint_valid
;
408 CORE_ADDR default_breakpoint_address
;
409 struct symtab
*default_breakpoint_symtab
;
410 int default_breakpoint_line
;
412 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
413 Advance *PP after the string and any trailing whitespace.
415 Currently the string can either be a number or "$" followed by the name
416 of a convenience variable. Making it an expression wouldn't work well
417 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
419 If the string is a NULL pointer, that denotes the last breakpoint.
421 TRAILER is a character which can be found after the number; most
422 commonly this is `-'. If you don't want a trailer, use \0. */
424 get_number_trailer (char **pp
, int trailer
)
426 int retval
= 0; /* default */
430 /* Empty line means refer to the last breakpoint. */
431 return breakpoint_count
;
434 /* Make a copy of the name, so we can null-terminate it
435 to pass to lookup_internalvar(). */
440 while (isalnum (*p
) || *p
== '_')
442 varname
= (char *) alloca (p
- start
+ 1);
443 strncpy (varname
, start
, p
- start
);
444 varname
[p
- start
] = '\0';
445 val
= value_of_internalvar (lookup_internalvar (varname
));
446 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
447 retval
= (int) value_as_long (val
);
450 printf_filtered (_("Convenience variable must have integer value.\n"));
458 while (*p
>= '0' && *p
<= '9')
461 /* There is no number here. (e.g. "cond a == b"). */
463 /* Skip non-numeric token */
464 while (*p
&& !isspace((int) *p
))
466 /* Return zero, which caller must interpret as error. */
472 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
474 /* Trailing junk: return 0 and let caller print error msg. */
475 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
486 /* Like get_number_trailer, but don't allow a trailer. */
488 get_number (char **pp
)
490 return get_number_trailer (pp
, '\0');
493 /* Parse a number or a range.
494 * A number will be of the form handled by get_number.
495 * A range will be of the form <number1> - <number2>, and
496 * will represent all the integers between number1 and number2,
499 * While processing a range, this fuction is called iteratively;
500 * At each call it will return the next value in the range.
502 * At the beginning of parsing a range, the char pointer PP will
503 * be advanced past <number1> and left pointing at the '-' token.
504 * Subsequent calls will not advance the pointer until the range
505 * is completed. The call that completes the range will advance
506 * pointer PP past <number2>.
510 get_number_or_range (char **pp
)
512 static int last_retval
, end_value
;
513 static char *end_ptr
;
514 static int in_range
= 0;
518 /* Default case: pp is pointing either to a solo number,
519 or to the first number of a range. */
520 last_retval
= get_number_trailer (pp
, '-');
525 /* This is the start of a range (<number1> - <number2>).
526 Skip the '-', parse and remember the second number,
527 and also remember the end of the final token. */
531 while (isspace ((int) *end_ptr
))
532 end_ptr
++; /* skip white space */
533 end_value
= get_number (temp
);
534 if (end_value
< last_retval
)
536 error (_("inverted range"));
538 else if (end_value
== last_retval
)
540 /* degenerate range (number1 == number2). Advance the
541 token pointer so that the range will be treated as a
550 error (_("negative value"));
553 /* pp points to the '-' that betokens a range. All
554 number-parsing has already been done. Return the next
555 integer value (one greater than the saved previous value).
556 Do not advance the token pointer 'pp' until the end of range
559 if (++last_retval
== end_value
)
561 /* End of range reached; advance token pointer. */
571 /* condition N EXP -- set break condition of breakpoint N to EXP. */
574 condition_command (char *arg
, int from_tty
)
576 struct breakpoint
*b
;
581 error_no_arg (_("breakpoint number"));
584 bnum
= get_number (&p
);
586 error (_("Bad breakpoint argument: '%s'"), arg
);
589 if (b
->number
== bnum
)
591 struct bp_location
*loc
= b
->loc
;
592 for (; loc
; loc
= loc
->next
)
600 if (b
->cond_string
!= NULL
)
601 xfree (b
->cond_string
);
605 b
->cond_string
= NULL
;
607 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
612 /* I don't know if it matters whether this is the string the user
613 typed in or the decompiled expression. */
614 b
->cond_string
= savestring (arg
, strlen (arg
));
615 b
->condition_not_parsed
= 0;
616 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
620 parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
622 error (_("Junk at end of expression"));
625 breakpoints_changed ();
626 breakpoint_modify_event (b
->number
);
630 error (_("No breakpoint number %d."), bnum
);
634 commands_command (char *arg
, int from_tty
)
636 struct breakpoint
*b
;
639 struct command_line
*l
;
641 /* If we allowed this, we would have problems with when to
642 free the storage, if we change the commands currently
645 if (executing_breakpoint_commands
)
646 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
649 bnum
= get_number (&p
);
652 error (_("Unexpected extra arguments following breakpoint number."));
655 if (b
->number
== bnum
)
657 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
659 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
660 l
= read_command_lines (tmpbuf
, from_tty
);
661 do_cleanups (cleanups
);
662 free_command_lines (&b
->commands
);
664 breakpoints_changed ();
665 breakpoint_modify_event (b
->number
);
668 error (_("No breakpoint number %d."), bnum
);
671 /* Like commands_command, but instead of reading the commands from
672 input stream, takes them from an already parsed command structure.
674 This is used by cli-script.c to DTRT with breakpoint commands
675 that are part of if and while bodies. */
676 enum command_control_type
677 commands_from_control_command (char *arg
, struct command_line
*cmd
)
679 struct breakpoint
*b
;
683 /* If we allowed this, we would have problems with when to
684 free the storage, if we change the commands currently
687 if (executing_breakpoint_commands
)
688 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
690 /* An empty string for the breakpoint number means the last
691 breakpoint, but get_number expects a NULL pointer. */
696 bnum
= get_number (&p
);
699 error (_("Unexpected extra arguments following breakpoint number."));
702 if (b
->number
== bnum
)
704 free_command_lines (&b
->commands
);
705 if (cmd
->body_count
!= 1)
706 error (_("Invalid \"commands\" block structure."));
707 /* We need to copy the commands because if/while will free the
708 list after it finishes execution. */
709 b
->commands
= copy_command_lines (cmd
->body_list
[0]);
710 breakpoints_changed ();
711 breakpoint_modify_event (b
->number
);
712 return simple_control
;
714 error (_("No breakpoint number %d."), bnum
);
717 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
718 by replacing any memory breakpoints with their shadowed contents. */
721 breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
, LONGEST len
)
723 struct bp_location
*b
;
724 CORE_ADDR bp_addr
= 0;
730 if (b
->owner
->type
== bp_none
)
731 warning (_("reading through apparently deleted breakpoint #%d?"),
734 if (b
->loc_type
!= bp_loc_software_breakpoint
)
738 /* Addresses and length of the part of the breakpoint that
740 bp_addr
= b
->target_info
.placed_address
;
741 bp_size
= b
->target_info
.shadow_len
;
743 /* bp isn't valid, or doesn't shadow memory. */
746 if (bp_addr
+ bp_size
<= memaddr
)
747 /* The breakpoint is entirely before the chunk of memory we
751 if (bp_addr
>= memaddr
+ len
)
752 /* The breakpoint is entirely after the chunk of memory we are
756 /* Offset within shadow_contents. */
757 if (bp_addr
< memaddr
)
759 /* Only copy the second part of the breakpoint. */
760 bp_size
-= memaddr
- bp_addr
;
761 bptoffset
= memaddr
- bp_addr
;
765 if (bp_addr
+ bp_size
> memaddr
+ len
)
767 /* Only copy the first part of the breakpoint. */
768 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
771 memcpy (buf
+ bp_addr
- memaddr
,
772 b
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
777 /* A wrapper function for inserting catchpoints. */
779 insert_catchpoint (struct ui_out
*uo
, void *args
)
781 struct breakpoint
*b
= (struct breakpoint
*) args
;
787 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
790 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
793 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
796 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
802 is_hardware_watchpoint (struct breakpoint
*bpt
)
804 return (bpt
->type
== bp_hardware_watchpoint
805 || bpt
->type
== bp_read_watchpoint
806 || bpt
->type
== bp_access_watchpoint
);
809 /* Find the current value of a watchpoint on EXP. Return the value in
810 *VALP and *RESULTP and the chain of intermediate and final values
811 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
814 If an error occurs while evaluating the expression, *RESULTP will
815 be set to NULL. *RESULTP may be a lazy value, if the result could
816 not be read from memory. It is used to determine whether a value
817 is user-specified (we should watch the whole value) or intermediate
818 (we should watch only the bit used to locate the final value).
820 If the final value, or any intermediate value, could not be read
821 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
822 set to any referenced values. *VALP will never be a lazy value.
823 This is the value which we store in struct breakpoint.
825 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
826 value chain. The caller must free the values individually. If
827 VAL_CHAIN is NULL, all generated values will be left on the value
831 fetch_watchpoint_value (struct expression
*exp
, struct value
**valp
,
832 struct value
**resultp
, struct value
**val_chain
)
834 struct value
*mark
, *new_mark
, *result
;
842 /* Evaluate the expression. */
843 mark
= value_mark ();
845 gdb_evaluate_expression (exp
, &result
);
846 new_mark
= value_mark ();
847 if (mark
== new_mark
)
852 /* Make sure it's not lazy, so that after the target stops again we
853 have a non-lazy previous value to compare with. */
855 && (!value_lazy (result
) || gdb_value_fetch_lazy (result
)))
860 /* Return the chain of intermediate values. We use this to
861 decide which addresses to watch. */
862 *val_chain
= new_mark
;
863 value_release_to_mark (mark
);
867 /* Assuming that B is a hardware watchpoint:
868 - Reparse watchpoint expression, is REPARSE is non-zero
869 - Evaluate expression and store the result in B->val
870 - Update the list of values that must be watched in B->loc.
872 If the watchpoint is disabled, do nothing. If this is
873 local watchpoint that is out of scope, delete it. */
875 update_watchpoint (struct breakpoint
*b
, int reparse
)
877 int within_current_scope
;
878 struct frame_id saved_frame_id
;
879 struct bp_location
*loc
;
882 /* We don't free locations. They are stored in
883 bp_location_chain and update_global_locations will
884 eventually delete them and remove breakpoints if
888 if (b
->disposition
== disp_del_at_next_stop
)
891 /* Save the current frame's ID so we can restore it after
892 evaluating the watchpoint expression on its own frame. */
893 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
894 took a frame parameter, so that we didn't have to change the
896 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
898 /* Determine if the watchpoint is within scope. */
899 if (b
->exp_valid_block
== NULL
)
900 within_current_scope
= 1;
903 struct frame_info
*fi
;
904 fi
= frame_find_by_id (b
->watchpoint_frame
);
905 within_current_scope
= (fi
!= NULL
);
906 if (within_current_scope
)
910 if (within_current_scope
&& reparse
)
919 b
->exp
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
920 /* If the meaning of expression itself changed, the old value is
921 no longer relevant. We don't want to report a watchpoint hit
922 to the user when the old value and the new value may actually
923 be completely different objects. */
929 /* If we failed to parse the expression, for example because
930 it refers to a global variable in a not-yet-loaded shared library,
931 don't try to insert watchpoint. We don't automatically delete
932 such watchpoint, though, since failure to parse expression
933 is different from out-of-scope watchpoint. */
934 if (within_current_scope
&& b
->exp
)
936 struct value
*val_chain
, *v
, *result
, *next
;
938 fetch_watchpoint_value (b
->exp
, &v
, &result
, &val_chain
);
940 /* Avoid setting b->val if it's already set. The meaning of
941 b->val is 'the last value' user saw, and we should update
942 it only if we reported that last value to user. As it
943 happens, the code that reports it updates b->val directly. */
950 /* Look at each value on the value chain. */
951 for (v
= val_chain
; v
; v
= next
)
953 /* If it's a memory location, and GDB actually needed
954 its contents to evaluate the expression, then we
955 must watch it. If the first value returned is
956 still lazy, that means an error occurred reading it;
957 watch it anyway in case it becomes readable. */
958 if (VALUE_LVAL (v
) == lval_memory
959 && (v
== val_chain
|| ! value_lazy (v
)))
961 struct type
*vtype
= check_typedef (value_type (v
));
963 /* We only watch structs and arrays if user asked
964 for it explicitly, never if they just happen to
965 appear in the middle of some value chain. */
967 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
968 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
972 struct bp_location
*loc
, **tmp
;
974 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
975 len
= TYPE_LENGTH (value_type (v
));
977 if (b
->type
== bp_read_watchpoint
)
979 else if (b
->type
== bp_access_watchpoint
)
982 loc
= allocate_bp_location (b
, bp_hardware_watchpoint
);
983 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
988 loc
->watchpoint_type
= type
;
992 next
= value_next (v
);
997 /* We just regenerated the list of breakpoint locations.
998 The new location does not have its condition field set to anything
999 and therefore, we must always reparse the cond_string, independently
1000 of the value of the reparse flag. */
1001 if (b
->cond_string
!= NULL
)
1003 char *s
= b
->cond_string
;
1004 b
->loc
->cond
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
1007 else if (!within_current_scope
)
1009 printf_filtered (_("\
1010 Hardware watchpoint %d deleted because the program has left the block \n\
1011 in which its expression is valid.\n"),
1013 if (b
->related_breakpoint
)
1014 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1015 b
->disposition
= disp_del_at_next_stop
;
1018 /* Restore the selected frame. */
1019 select_frame (frame_find_by_id (saved_frame_id
));
1023 /* Returns 1 iff breakpoint location should be
1024 inserted in the inferior. */
1026 should_be_inserted (struct bp_location
*bpt
)
1028 if (!breakpoint_enabled (bpt
->owner
))
1031 if (bpt
->owner
->disposition
== disp_del_at_next_stop
)
1034 if (!bpt
->enabled
|| bpt
->shlib_disabled
|| bpt
->duplicate
)
1040 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1041 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1042 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
1044 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1045 method for each breakpoint or catchpoint type. */
1047 insert_bp_location (struct bp_location
*bpt
,
1048 struct ui_file
*tmp_error_stream
,
1049 int *disabled_breaks
, int *process_warning
,
1050 int *hw_breakpoint_error
)
1054 if (!should_be_inserted (bpt
) || bpt
->inserted
)
1057 /* Initialize the target-specific information. */
1058 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
1059 bpt
->target_info
.placed_address
= bpt
->address
;
1061 if (bpt
->loc_type
== bp_loc_software_breakpoint
1062 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1064 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
1066 /* If the explicitly specified breakpoint type
1067 is not hardware breakpoint, check the memory map to see
1068 if the breakpoint address is in read only memory or not.
1069 Two important cases are:
1070 - location type is not hardware breakpoint, memory
1071 is readonly. We change the type of the location to
1072 hardware breakpoint.
1073 - location type is hardware breakpoint, memory is read-write.
1074 This means we've previously made the location hardware one, but
1075 then the memory map changed, so we undo.
1077 When breakpoints are removed, remove_breakpoints will
1078 use location types we've just set here, the only possible
1079 problem is that memory map has changed during running program,
1080 but it's not going to work anyway with current gdb. */
1081 struct mem_region
*mr
1082 = lookup_mem_region (bpt
->target_info
.placed_address
);
1086 if (automatic_hardware_breakpoints
)
1089 enum bp_loc_type new_type
;
1091 if (mr
->attrib
.mode
!= MEM_RW
)
1092 new_type
= bp_loc_hardware_breakpoint
;
1094 new_type
= bp_loc_software_breakpoint
;
1096 if (new_type
!= bpt
->loc_type
)
1098 static int said
= 0;
1099 bpt
->loc_type
= new_type
;
1102 fprintf_filtered (gdb_stdout
, _("\
1103 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1108 else if (bpt
->loc_type
== bp_loc_software_breakpoint
1109 && mr
->attrib
.mode
!= MEM_RW
)
1110 warning (_("cannot set software breakpoint at readonly address %s"),
1111 paddr (bpt
->address
));
1115 /* First check to see if we have to handle an overlay. */
1116 if (overlay_debugging
== ovly_off
1117 || bpt
->section
== NULL
1118 || !(section_is_overlay (bpt
->section
)))
1120 /* No overlay handling: just set the breakpoint. */
1122 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1123 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1125 val
= target_insert_breakpoint (&bpt
->target_info
);
1129 /* This breakpoint is in an overlay section.
1130 Shall we set a breakpoint at the LMA? */
1131 if (!overlay_events_enabled
)
1133 /* Yes -- overlay event support is not active,
1134 so we must try to set a breakpoint at the LMA.
1135 This will not work for a hardware breakpoint. */
1136 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1137 warning (_("hardware breakpoint %d not supported in overlay!"),
1138 bpt
->owner
->number
);
1141 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
1143 /* Set a software (trap) breakpoint at the LMA. */
1144 bpt
->overlay_target_info
= bpt
->target_info
;
1145 bpt
->overlay_target_info
.placed_address
= addr
;
1146 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
1148 fprintf_unfiltered (tmp_error_stream
,
1149 "Overlay breakpoint %d failed: in ROM?",
1150 bpt
->owner
->number
);
1153 /* Shall we set a breakpoint at the VMA? */
1154 if (section_is_mapped (bpt
->section
))
1156 /* Yes. This overlay section is mapped into memory. */
1157 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1158 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1160 val
= target_insert_breakpoint (&bpt
->target_info
);
1164 /* No. This breakpoint will not be inserted.
1165 No error, but do not mark the bp as 'inserted'. */
1172 /* Can't set the breakpoint. */
1173 if (solib_address (bpt
->address
))
1175 /* See also: disable_breakpoints_in_shlibs. */
1177 bpt
->shlib_disabled
= 1;
1178 if (!*disabled_breaks
)
1180 fprintf_unfiltered (tmp_error_stream
,
1181 "Cannot insert breakpoint %d.\n",
1182 bpt
->owner
->number
);
1183 fprintf_unfiltered (tmp_error_stream
,
1184 "Temporarily disabling shared library breakpoints:\n");
1186 *disabled_breaks
= 1;
1187 fprintf_unfiltered (tmp_error_stream
,
1188 "breakpoint #%d\n", bpt
->owner
->number
);
1192 #ifdef ONE_PROCESS_WRITETEXT
1193 *process_warning
= 1;
1195 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1197 *hw_breakpoint_error
= 1;
1198 fprintf_unfiltered (tmp_error_stream
,
1199 "Cannot insert hardware breakpoint %d.\n",
1200 bpt
->owner
->number
);
1204 fprintf_unfiltered (tmp_error_stream
,
1205 "Cannot insert breakpoint %d.\n",
1206 bpt
->owner
->number
);
1207 fprintf_filtered (tmp_error_stream
,
1208 "Error accessing memory address ");
1209 fputs_filtered (paddress (bpt
->address
), tmp_error_stream
);
1210 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1211 safe_strerror (val
));
1222 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
1223 /* NOTE drow/2003-09-08: This state only exists for removing
1224 watchpoints. It's not clear that it's necessary... */
1225 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
1227 val
= target_insert_watchpoint (bpt
->address
,
1229 bpt
->watchpoint_type
);
1230 bpt
->inserted
= (val
!= -1);
1233 else if (bpt
->owner
->type
== bp_catch_fork
1234 || bpt
->owner
->type
== bp_catch_vfork
1235 || bpt
->owner
->type
== bp_catch_exec
)
1237 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1238 bpt
->owner
, RETURN_MASK_ERROR
);
1239 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1240 bpt
->owner
->number
);
1242 bpt
->owner
->enable_state
= bp_disabled
;
1246 /* We've already printed an error message if there was a problem
1247 inserting this catchpoint, and we've disabled the catchpoint,
1248 so just return success. */
1255 /* Make sure all breakpoints are inserted in inferior.
1256 Throws exception on any error.
1257 A breakpoint that is already inserted won't be inserted
1258 again, so calling this function twice is safe. */
1260 insert_breakpoints (void)
1262 struct breakpoint
*bpt
;
1264 ALL_BREAKPOINTS (bpt
)
1265 if (is_hardware_watchpoint (bpt
))
1266 update_watchpoint (bpt
, 0 /* don't reparse. */);
1268 update_global_location_list ();
1270 if (!always_inserted_mode
&& target_has_execution
)
1271 /* update_global_location_list does not insert breakpoints
1272 when always_inserted_mode is not enabled. Explicitly
1274 insert_breakpoint_locations ();
1277 /* insert_breakpoints is used when starting or continuing the program.
1278 remove_breakpoints is used when the program stops.
1279 Both return zero if successful,
1280 or an `errno' value if could not write the inferior. */
1283 insert_breakpoint_locations (void)
1285 struct breakpoint
*bpt
;
1286 struct bp_location
*b
, *temp
;
1289 int disabled_breaks
= 0;
1290 int hw_breakpoint_error
= 0;
1291 int process_warning
= 0;
1293 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1294 make_cleanup_ui_file_delete (tmp_error_stream
);
1296 /* Explicitly mark the warning -- this will only be printed if
1297 there was an error. */
1298 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1300 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1302 if (!should_be_inserted (b
) || b
->inserted
)
1305 /* There is no point inserting thread-specific breakpoints if the
1306 thread no longer exists. */
1307 if (b
->owner
->thread
!= -1
1308 && !valid_thread_id (b
->owner
->thread
))
1311 val
= insert_bp_location (b
, tmp_error_stream
,
1312 &disabled_breaks
, &process_warning
,
1313 &hw_breakpoint_error
);
1318 /* If we failed to insert all locations of a watchpoint,
1319 remove them, as half-inserted watchpoint is of limited use. */
1320 ALL_BREAKPOINTS (bpt
)
1322 int some_failed
= 0;
1323 struct bp_location
*loc
;
1325 if (!is_hardware_watchpoint (bpt
))
1328 if (bpt
->enable_state
!= bp_enabled
)
1331 if (bpt
->disposition
== disp_del_at_next_stop
)
1334 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1342 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1344 remove_breakpoint (loc
, mark_uninserted
);
1346 hw_breakpoint_error
= 1;
1347 fprintf_unfiltered (tmp_error_stream
,
1348 "Could not insert hardware watchpoint %d.\n",
1356 /* If a hardware breakpoint or watchpoint was inserted, add a
1357 message about possibly exhausted resources. */
1358 if (hw_breakpoint_error
)
1360 fprintf_unfiltered (tmp_error_stream
,
1361 "Could not insert hardware breakpoints:\n\
1362 You may have requested too many hardware breakpoints/watchpoints.\n");
1364 #ifdef ONE_PROCESS_WRITETEXT
1365 if (process_warning
)
1366 fprintf_unfiltered (tmp_error_stream
,
1367 "The same program may be running in another process.");
1369 target_terminal_ours_for_output ();
1370 error_stream (tmp_error_stream
);
1375 remove_breakpoints (void)
1377 struct bp_location
*b
;
1380 ALL_BP_LOCATIONS (b
)
1384 val
= remove_breakpoint (b
, mark_uninserted
);
1393 remove_hw_watchpoints (void)
1395 struct bp_location
*b
;
1398 ALL_BP_LOCATIONS (b
)
1400 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1402 val
= remove_breakpoint (b
, mark_uninserted
);
1411 reattach_breakpoints (int pid
)
1413 struct bp_location
*b
;
1415 struct cleanup
*old_chain
= save_inferior_ptid ();
1416 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1417 int dummy1
= 0, dummy2
= 0, dummy3
= 0;
1419 make_cleanup_ui_file_delete (tmp_error_stream
);
1421 inferior_ptid
= pid_to_ptid (pid
);
1422 ALL_BP_LOCATIONS (b
)
1427 val
= insert_bp_location (b
, tmp_error_stream
,
1428 &dummy1
, &dummy2
, &dummy3
);
1431 do_cleanups (old_chain
);
1436 do_cleanups (old_chain
);
1441 restore_always_inserted_mode (void *p
)
1443 always_inserted_mode
= (uintptr_t) p
;
1447 update_breakpoints_after_exec (void)
1449 struct breakpoint
*b
;
1450 struct breakpoint
*temp
;
1451 struct cleanup
*cleanup
;
1453 /* Doing this first prevents the badness of having delete_breakpoint()
1454 write a breakpoint's current "shadow contents" to lift the bp. That
1455 shadow is NOT valid after an exec()! */
1456 mark_breakpoints_out ();
1458 /* The binary we used to debug is now gone, and we're updating
1459 breakpoints for the new binary. Until we're done, we should not
1460 try to insert breakpoints. */
1461 cleanup
= make_cleanup (restore_always_inserted_mode
,
1462 (void *) (uintptr_t) always_inserted_mode
);
1463 always_inserted_mode
= 0;
1465 ALL_BREAKPOINTS_SAFE (b
, temp
)
1467 /* Solib breakpoints must be explicitly reset after an exec(). */
1468 if (b
->type
== bp_shlib_event
)
1470 delete_breakpoint (b
);
1474 /* Thread event breakpoints must be set anew after an exec(),
1475 as must overlay event breakpoints. */
1476 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1478 delete_breakpoint (b
);
1482 /* Step-resume breakpoints are meaningless after an exec(). */
1483 if (b
->type
== bp_step_resume
)
1485 delete_breakpoint (b
);
1489 /* Don't delete an exec catchpoint, because else the inferior
1490 won't stop when it ought!
1492 Similarly, we probably ought to keep vfork catchpoints, 'cause
1493 on this target, we may not be able to stop when the vfork is
1494 seen, but only when the subsequent exec is seen. (And because
1495 deleting fork catchpoints here but not vfork catchpoints will
1496 seem mysterious to users, keep those too.) */
1497 if ((b
->type
== bp_catch_exec
) ||
1498 (b
->type
== bp_catch_vfork
) ||
1499 (b
->type
== bp_catch_fork
))
1504 /* bp_finish is a special case. The only way we ought to be able
1505 to see one of these when an exec() has happened, is if the user
1506 caught a vfork, and then said "finish". Ordinarily a finish just
1507 carries them to the call-site of the current callee, by setting
1508 a temporary bp there and resuming. But in this case, the finish
1509 will carry them entirely through the vfork & exec.
1511 We don't want to allow a bp_finish to remain inserted now. But
1512 we can't safely delete it, 'cause finish_command has a handle to
1513 the bp on a bpstat, and will later want to delete it. There's a
1514 chance (and I've seen it happen) that if we delete the bp_finish
1515 here, that its storage will get reused by the time finish_command
1516 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1517 We really must allow finish_command to delete a bp_finish.
1519 In the absense of a general solution for the "how do we know
1520 it's safe to delete something others may have handles to?"
1521 problem, what we'll do here is just uninsert the bp_finish, and
1522 let finish_command delete it.
1524 (We know the bp_finish is "doomed" in the sense that it's
1525 momentary, and will be deleted as soon as finish_command sees
1526 the inferior stopped. So it doesn't matter that the bp's
1527 address is probably bogus in the new a.out, unlike e.g., the
1528 solib breakpoints.) */
1530 if (b
->type
== bp_finish
)
1535 /* Without a symbolic address, we have little hope of the
1536 pre-exec() address meaning the same thing in the post-exec()
1538 if (b
->addr_string
== NULL
)
1540 delete_breakpoint (b
);
1544 /* FIXME what about longjmp breakpoints? Re-create them here? */
1545 create_overlay_event_breakpoint ("_ovly_debug_event");
1546 do_cleanups (cleanup
);
1550 detach_breakpoints (int pid
)
1552 struct bp_location
*b
;
1554 struct cleanup
*old_chain
= save_inferior_ptid ();
1556 if (pid
== PIDGET (inferior_ptid
))
1557 error (_("Cannot detach breakpoints of inferior_ptid"));
1559 /* Set inferior_ptid; remove_breakpoint uses this global. */
1560 inferior_ptid
= pid_to_ptid (pid
);
1561 ALL_BP_LOCATIONS (b
)
1565 val
= remove_breakpoint (b
, mark_inserted
);
1568 do_cleanups (old_chain
);
1573 do_cleanups (old_chain
);
1578 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1582 if (b
->owner
->enable_state
== bp_permanent
)
1583 /* Permanent breakpoints cannot be inserted or removed. */
1586 /* The type of none suggests that owner is actually deleted.
1587 This should not ever happen. */
1588 gdb_assert (b
->owner
->type
!= bp_none
);
1590 if (b
->loc_type
== bp_loc_software_breakpoint
1591 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1593 /* "Normal" instruction breakpoint: either the standard
1594 trap-instruction bp (bp_breakpoint), or a
1595 bp_hardware_breakpoint. */
1597 /* First check to see if we have to handle an overlay. */
1598 if (overlay_debugging
== ovly_off
1599 || b
->section
== NULL
1600 || !(section_is_overlay (b
->section
)))
1602 /* No overlay handling: just remove the breakpoint. */
1604 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1605 val
= target_remove_hw_breakpoint (&b
->target_info
);
1607 val
= target_remove_breakpoint (&b
->target_info
);
1611 /* This breakpoint is in an overlay section.
1612 Did we set a breakpoint at the LMA? */
1613 if (!overlay_events_enabled
)
1615 /* Yes -- overlay event support is not active, so we
1616 should have set a breakpoint at the LMA. Remove it.
1618 /* Ignore any failures: if the LMA is in ROM, we will
1619 have already warned when we failed to insert it. */
1620 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1621 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1623 target_remove_breakpoint (&b
->overlay_target_info
);
1625 /* Did we set a breakpoint at the VMA?
1626 If so, we will have marked the breakpoint 'inserted'. */
1629 /* Yes -- remove it. Previously we did not bother to
1630 remove the breakpoint if the section had been
1631 unmapped, but let's not rely on that being safe. We
1632 don't know what the overlay manager might do. */
1633 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1634 val
= target_remove_hw_breakpoint (&b
->target_info
);
1636 /* However, we should remove *software* breakpoints only
1637 if the section is still mapped, or else we overwrite
1638 wrong code with the saved shadow contents. */
1639 else if (section_is_mapped (b
->section
))
1640 val
= target_remove_breakpoint (&b
->target_info
);
1646 /* No -- not inserted, so no need to remove. No error. */
1652 b
->inserted
= (is
== mark_inserted
);
1654 else if (b
->loc_type
== bp_loc_hardware_watchpoint
)
1659 b
->inserted
= (is
== mark_inserted
);
1660 val
= target_remove_watchpoint (b
->address
, b
->length
,
1661 b
->watchpoint_type
);
1663 /* Failure to remove any of the hardware watchpoints comes here. */
1664 if ((is
== mark_uninserted
) && (b
->inserted
))
1665 warning (_("Could not remove hardware watchpoint %d."),
1668 else if ((b
->owner
->type
== bp_catch_fork
||
1669 b
->owner
->type
== bp_catch_vfork
||
1670 b
->owner
->type
== bp_catch_exec
)
1671 && breakpoint_enabled (b
->owner
)
1675 switch (b
->owner
->type
)
1678 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1680 case bp_catch_vfork
:
1681 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1684 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1687 warning (_("Internal error, %s line %d."), __FILE__
, __LINE__
);
1692 b
->inserted
= (is
== mark_inserted
);
1698 /* Clear the "inserted" flag in all breakpoints. */
1701 mark_breakpoints_out (void)
1703 struct bp_location
*bpt
;
1705 ALL_BP_LOCATIONS (bpt
)
1709 /* Clear the "inserted" flag in all breakpoints and delete any
1710 breakpoints which should go away between runs of the program.
1712 Plus other such housekeeping that has to be done for breakpoints
1715 Note: this function gets called at the end of a run (by
1716 generic_mourn_inferior) and when a run begins (by
1717 init_wait_for_inferior). */
1722 breakpoint_init_inferior (enum inf_context context
)
1724 struct breakpoint
*b
, *temp
;
1725 struct bp_location
*bpt
;
1727 ALL_BP_LOCATIONS (bpt
)
1730 ALL_BREAKPOINTS_SAFE (b
, temp
)
1735 case bp_watchpoint_scope
:
1737 /* If the call dummy breakpoint is at the entry point it will
1738 cause problems when the inferior is rerun, so we better
1741 Also get rid of scope breakpoints. */
1742 delete_breakpoint (b
);
1746 case bp_hardware_watchpoint
:
1747 case bp_read_watchpoint
:
1748 case bp_access_watchpoint
:
1750 /* Likewise for watchpoints on local expressions. */
1751 if (b
->exp_valid_block
!= NULL
)
1752 delete_breakpoint (b
);
1753 else if (context
== inf_starting
)
1755 /* Reset val field to force reread of starting value
1756 in insert_breakpoints. */
1758 value_free (b
->val
);
1769 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1770 exists at PC. It returns ordinary_breakpoint_here if it's an
1771 ordinary breakpoint, or permanent_breakpoint_here if it's a
1772 permanent breakpoint.
1773 - When continuing from a location with an ordinary breakpoint, we
1774 actually single step once before calling insert_breakpoints.
1775 - When continuing from a localion with a permanent breakpoint, we
1776 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1777 the target, to advance the PC past the breakpoint. */
1779 enum breakpoint_here
1780 breakpoint_here_p (CORE_ADDR pc
)
1782 const struct bp_location
*bpt
;
1783 int any_breakpoint_here
= 0;
1785 ALL_BP_LOCATIONS (bpt
)
1787 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1788 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1791 if ((breakpoint_enabled (bpt
->owner
)
1792 || bpt
->owner
->enable_state
== bp_permanent
)
1793 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1795 if (overlay_debugging
1796 && section_is_overlay (bpt
->section
)
1797 && !section_is_mapped (bpt
->section
))
1798 continue; /* unmapped overlay -- can't be a match */
1799 else if (bpt
->owner
->enable_state
== bp_permanent
)
1800 return permanent_breakpoint_here
;
1802 any_breakpoint_here
= 1;
1806 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1810 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1811 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1812 This does not check for single-step breakpoints, which are
1813 inserted and removed using direct target manipulation. */
1816 regular_breakpoint_inserted_here_p (CORE_ADDR pc
)
1818 const struct bp_location
*bpt
;
1820 ALL_BP_LOCATIONS (bpt
)
1822 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1823 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1827 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1829 if (overlay_debugging
1830 && section_is_overlay (bpt
->section
)
1831 && !section_is_mapped (bpt
->section
))
1832 continue; /* unmapped overlay -- can't be a match */
1840 /* Returns non-zero iff there's either regular breakpoint
1841 or a single step breakpoint inserted at PC. */
1844 breakpoint_inserted_here_p (CORE_ADDR pc
)
1846 if (regular_breakpoint_inserted_here_p (pc
))
1849 if (single_step_breakpoint_inserted_here_p (pc
))
1855 /* This function returns non-zero iff there is a software breakpoint
1859 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1861 const struct bp_location
*bpt
;
1862 int any_breakpoint_here
= 0;
1864 ALL_BP_LOCATIONS (bpt
)
1866 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1870 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1872 if (overlay_debugging
1873 && section_is_overlay (bpt
->section
)
1874 && !section_is_mapped (bpt
->section
))
1875 continue; /* unmapped overlay -- can't be a match */
1881 /* Also check for software single-step breakpoints. */
1882 if (single_step_breakpoint_inserted_here_p (pc
))
1888 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1889 PC is valid for process/thread PTID. */
1892 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1894 const struct bp_location
*bpt
;
1897 thread
= pid_to_thread_id (ptid
);
1899 ALL_BP_LOCATIONS (bpt
)
1901 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1902 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1905 if ((breakpoint_enabled (bpt
->owner
)
1906 || bpt
->owner
->enable_state
== bp_permanent
)
1907 && bpt
->address
== pc
1908 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1910 if (overlay_debugging
1911 && section_is_overlay (bpt
->section
)
1912 && !section_is_mapped (bpt
->section
))
1913 continue; /* unmapped overlay -- can't be a match */
1923 /* bpstat stuff. External routines' interfaces are documented
1927 ep_is_catchpoint (struct breakpoint
*ep
)
1930 (ep
->type
== bp_catch_load
)
1931 || (ep
->type
== bp_catch_unload
)
1932 || (ep
->type
== bp_catch_fork
)
1933 || (ep
->type
== bp_catch_vfork
)
1934 || (ep
->type
== bp_catch_exec
);
1936 /* ??rehrauer: Add more kinds here, as are implemented... */
1940 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1943 (ep
->type
== bp_catch_load
)
1944 || (ep
->type
== bp_catch_unload
);
1948 bpstat_free (bpstat bs
)
1950 if (bs
->old_val
!= NULL
)
1951 value_free (bs
->old_val
);
1952 free_command_lines (&bs
->commands
);
1956 /* Clear a bpstat so that it says we are not at any breakpoint.
1957 Also free any storage that is part of a bpstat. */
1960 bpstat_clear (bpstat
*bsp
)
1977 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1978 is part of the bpstat is copied as well. */
1981 bpstat_copy (bpstat bs
)
1985 bpstat retval
= NULL
;
1990 for (; bs
!= NULL
; bs
= bs
->next
)
1992 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1993 memcpy (tmp
, bs
, sizeof (*tmp
));
1994 if (bs
->commands
!= NULL
)
1995 tmp
->commands
= copy_command_lines (bs
->commands
);
1996 if (bs
->old_val
!= NULL
)
1997 tmp
->old_val
= value_copy (bs
->old_val
);
2000 /* This is the first thing in the chain. */
2010 /* Find the bpstat associated with this breakpoint */
2013 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
2018 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2020 if (bsp
->breakpoint_at
&& bsp
->breakpoint_at
->owner
== breakpoint
)
2026 /* Find a step_resume breakpoint associated with this bpstat.
2027 (If there are multiple step_resume bp's on the list, this function
2028 will arbitrarily pick one.)
2030 It is an error to use this function if BPSTAT doesn't contain a
2031 step_resume breakpoint.
2033 See wait_for_inferior's use of this function. */
2035 bpstat_find_step_resume_breakpoint (bpstat bsp
)
2039 gdb_assert (bsp
!= NULL
);
2041 current_thread
= pid_to_thread_id (inferior_ptid
);
2043 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2045 if ((bsp
->breakpoint_at
!= NULL
) &&
2046 (bsp
->breakpoint_at
->owner
->type
== bp_step_resume
) &&
2047 (bsp
->breakpoint_at
->owner
->thread
== current_thread
||
2048 bsp
->breakpoint_at
->owner
->thread
== -1))
2049 return bsp
->breakpoint_at
->owner
;
2052 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2056 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2057 at. *BSP upon return is a bpstat which points to the remaining
2058 breakpoints stopped at (but which is not guaranteed to be good for
2059 anything but further calls to bpstat_num).
2060 Return 0 if passed a bpstat which does not indicate any breakpoints.
2061 Return -1 if stopped at a breakpoint that has been deleted since
2063 Return 1 otherwise. */
2066 bpstat_num (bpstat
*bsp
, int *num
)
2068 struct breakpoint
*b
;
2071 return 0; /* No more breakpoint values */
2073 /* We assume we'll never have several bpstats that
2074 correspond to a single breakpoint -- otherwise,
2075 this function might return the same number more
2076 than once and this will look ugly. */
2077 b
= (*bsp
)->breakpoint_at
? (*bsp
)->breakpoint_at
->owner
: NULL
;
2078 *bsp
= (*bsp
)->next
;
2080 return -1; /* breakpoint that's been deleted since */
2082 *num
= b
->number
; /* We have its number */
2086 /* Modify BS so that the actions will not be performed. */
2089 bpstat_clear_actions (bpstat bs
)
2091 for (; bs
!= NULL
; bs
= bs
->next
)
2093 free_command_lines (&bs
->commands
);
2094 if (bs
->old_val
!= NULL
)
2096 value_free (bs
->old_val
);
2102 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2104 cleanup_executing_breakpoints (void *ignore
)
2106 executing_breakpoint_commands
= 0;
2109 /* Execute all the commands associated with all the breakpoints at this
2110 location. Any of these commands could cause the process to proceed
2111 beyond this point, etc. We look out for such changes by checking
2112 the global "breakpoint_proceeded" after each command. */
2115 bpstat_do_actions (bpstat
*bsp
)
2118 struct cleanup
*old_chain
;
2120 /* Avoid endless recursion if a `source' command is contained
2122 if (executing_breakpoint_commands
)
2125 executing_breakpoint_commands
= 1;
2126 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2129 /* Note that (as of this writing), our callers all appear to
2130 be passing us the address of global stop_bpstat. And, if
2131 our calls to execute_control_command cause the inferior to
2132 proceed, that global (and hence, *bsp) will change.
2134 We must be careful to not touch *bsp unless the inferior
2135 has not proceeded. */
2137 /* This pointer will iterate over the list of bpstat's. */
2140 breakpoint_proceeded
= 0;
2141 for (; bs
!= NULL
; bs
= bs
->next
)
2143 struct command_line
*cmd
;
2144 struct cleanup
*this_cmd_tree_chain
;
2146 /* Take ownership of the BSP's command tree, if it has one.
2148 The command tree could legitimately contain commands like
2149 'step' and 'next', which call clear_proceed_status, which
2150 frees stop_bpstat's command tree. To make sure this doesn't
2151 free the tree we're executing out from under us, we need to
2152 take ownership of the tree ourselves. Since a given bpstat's
2153 commands are only executed once, we don't need to copy it; we
2154 can clear the pointer in the bpstat, and make sure we free
2155 the tree when we're done. */
2158 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2162 execute_control_command (cmd
);
2164 if (breakpoint_proceeded
)
2170 /* We can free this command tree now. */
2171 do_cleanups (this_cmd_tree_chain
);
2173 if (breakpoint_proceeded
)
2175 if (target_can_async_p ())
2176 /* If we are in async mode, then the target might
2177 be still running, not stopped at any breakpoint,
2178 so nothing for us to do here -- just return to
2182 /* In sync mode, when execute_control_command returns
2183 we're already standing on the next breakpoint.
2184 Breakpoint commands for that stop were not run,
2185 since execute_command does not run breakpoint
2186 commands -- only command_line_handler does, but
2187 that one is not involved in execution of breakpoint
2188 commands. So, we can now execute breakpoint commands.
2189 There's an implicit assumption that we're called with
2190 stop_bpstat, so our parameter is the new bpstat to
2192 It should be noted that making execute_command do
2193 bpstat actions is not an option -- in this case we'll
2194 have recursive invocation of bpstat for each breakpoint
2195 with a command, and can easily blow up GDB stack. */
2199 do_cleanups (old_chain
);
2202 /* Print out the (old or new) value associated with a watchpoint. */
2205 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2208 fprintf_unfiltered (stream
, _("<unreadable>"));
2210 value_print (val
, stream
, 0, Val_pretty_default
);
2213 /* This is the normal print function for a bpstat. In the future,
2214 much of this logic could (should?) be moved to bpstat_stop_status,
2215 by having it set different print_it values.
2217 Current scheme: When we stop, bpstat_print() is called. It loops
2218 through the bpstat list of things causing this stop, calling the
2219 print_bp_stop_message function on each one. The behavior of the
2220 print_bp_stop_message function depends on the print_it field of
2221 bpstat. If such field so indicates, call this function here.
2223 Return values from this routine (ultimately used by bpstat_print()
2224 and normal_stop() to decide what to do):
2225 PRINT_NOTHING: Means we already printed all we needed to print,
2226 don't print anything else.
2227 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2228 that something to be followed by a location.
2229 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2230 that something to be followed by a location.
2231 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2234 static enum print_stop_action
2235 print_it_typical (bpstat bs
)
2237 struct cleanup
*old_chain
, *ui_out_chain
;
2238 struct breakpoint
*b
;
2239 const struct bp_location
*bl
;
2240 struct ui_stream
*stb
;
2242 stb
= ui_out_stream_new (uiout
);
2243 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2244 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2245 which has since been deleted. */
2246 if (bs
->breakpoint_at
== NULL
)
2247 return PRINT_UNKNOWN
;
2248 bl
= bs
->breakpoint_at
;
2254 case bp_hardware_breakpoint
:
2255 bp_temp
= bs
->breakpoint_at
->owner
->disposition
== disp_del
;
2256 if (bl
->address
!= bl
->requested_address
)
2257 breakpoint_adjustment_warning (bl
->requested_address
,
2260 annotate_breakpoint (b
->number
);
2262 ui_out_text (uiout
, "\nTemporary breakpoint ");
2264 ui_out_text (uiout
, "\nBreakpoint ");
2265 if (ui_out_is_mi_like_p (uiout
))
2267 ui_out_field_string (uiout
, "reason",
2268 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2269 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
2271 ui_out_field_int (uiout
, "bkptno", b
->number
);
2272 ui_out_text (uiout
, ", ");
2273 return PRINT_SRC_AND_LOC
;
2276 case bp_shlib_event
:
2277 /* Did we stop because the user set the stop_on_solib_events
2278 variable? (If so, we report this as a generic, "Stopped due
2279 to shlib event" message.) */
2280 printf_filtered (_("Stopped due to shared library event\n"));
2281 return PRINT_NOTHING
;
2284 case bp_thread_event
:
2285 /* Not sure how we will get here.
2286 GDB should not stop for these breakpoints. */
2287 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2288 return PRINT_NOTHING
;
2291 case bp_overlay_event
:
2292 /* By analogy with the thread event, GDB should not stop for these. */
2293 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2294 return PRINT_NOTHING
;
2298 annotate_catchpoint (b
->number
);
2299 printf_filtered (_("\nCatchpoint %d (loaded %s), "),
2301 b
->triggered_dll_pathname
);
2302 return PRINT_SRC_AND_LOC
;
2305 case bp_catch_unload
:
2306 annotate_catchpoint (b
->number
);
2307 printf_filtered (_("\nCatchpoint %d (unloaded %s), "),
2309 b
->triggered_dll_pathname
);
2310 return PRINT_SRC_AND_LOC
;
2314 annotate_catchpoint (b
->number
);
2315 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
2317 b
->forked_inferior_pid
);
2318 return PRINT_SRC_AND_LOC
;
2321 case bp_catch_vfork
:
2322 annotate_catchpoint (b
->number
);
2323 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
2325 b
->forked_inferior_pid
);
2326 return PRINT_SRC_AND_LOC
;
2330 annotate_catchpoint (b
->number
);
2331 printf_filtered (_("\nCatchpoint %d (exec'd %s), "),
2334 return PRINT_SRC_AND_LOC
;
2338 case bp_hardware_watchpoint
:
2339 annotate_watchpoint (b
->number
);
2340 if (ui_out_is_mi_like_p (uiout
))
2343 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2345 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2346 ui_out_text (uiout
, "\nOld value = ");
2347 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2348 ui_out_field_stream (uiout
, "old", stb
);
2349 ui_out_text (uiout
, "\nNew value = ");
2350 watchpoint_value_print (b
->val
, stb
->stream
);
2351 ui_out_field_stream (uiout
, "new", stb
);
2352 do_cleanups (ui_out_chain
);
2353 ui_out_text (uiout
, "\n");
2354 /* More than one watchpoint may have been triggered. */
2355 return PRINT_UNKNOWN
;
2358 case bp_read_watchpoint
:
2359 if (ui_out_is_mi_like_p (uiout
))
2362 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2364 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2365 ui_out_text (uiout
, "\nValue = ");
2366 watchpoint_value_print (b
->val
, stb
->stream
);
2367 ui_out_field_stream (uiout
, "value", stb
);
2368 do_cleanups (ui_out_chain
);
2369 ui_out_text (uiout
, "\n");
2370 return PRINT_UNKNOWN
;
2373 case bp_access_watchpoint
:
2374 if (bs
->old_val
!= NULL
)
2376 annotate_watchpoint (b
->number
);
2377 if (ui_out_is_mi_like_p (uiout
))
2380 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2382 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2383 ui_out_text (uiout
, "\nOld value = ");
2384 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2385 ui_out_field_stream (uiout
, "old", stb
);
2386 ui_out_text (uiout
, "\nNew value = ");
2391 if (ui_out_is_mi_like_p (uiout
))
2394 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2395 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2396 ui_out_text (uiout
, "\nValue = ");
2398 watchpoint_value_print (b
->val
, stb
->stream
);
2399 ui_out_field_stream (uiout
, "new", stb
);
2400 do_cleanups (ui_out_chain
);
2401 ui_out_text (uiout
, "\n");
2402 return PRINT_UNKNOWN
;
2405 /* Fall through, we don't deal with these types of breakpoints
2409 if (ui_out_is_mi_like_p (uiout
))
2412 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2413 return PRINT_UNKNOWN
;
2417 if (ui_out_is_mi_like_p (uiout
))
2420 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2421 return PRINT_UNKNOWN
;
2426 case bp_longjmp_resume
:
2427 case bp_step_resume
:
2428 case bp_watchpoint_scope
:
2431 return PRINT_UNKNOWN
;
2435 /* Generic routine for printing messages indicating why we
2436 stopped. The behavior of this function depends on the value
2437 'print_it' in the bpstat structure. Under some circumstances we
2438 may decide not to print anything here and delegate the task to
2441 static enum print_stop_action
2442 print_bp_stop_message (bpstat bs
)
2444 switch (bs
->print_it
)
2447 /* Nothing should be printed for this bpstat entry. */
2448 return PRINT_UNKNOWN
;
2452 /* We still want to print the frame, but we already printed the
2453 relevant messages. */
2454 return PRINT_SRC_AND_LOC
;
2457 case print_it_normal
:
2459 const struct bp_location
*bl
= bs
->breakpoint_at
;
2460 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2462 /* Normal case. Call the breakpoint's print_it method, or
2463 print_it_typical. */
2464 /* FIXME: how breakpoint can ever be NULL here? */
2465 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2466 return b
->ops
->print_it (b
);
2468 return print_it_typical (bs
);
2473 internal_error (__FILE__
, __LINE__
,
2474 _("print_bp_stop_message: unrecognized enum value"));
2479 /* Print a message indicating what happened. This is called from
2480 normal_stop(). The input to this routine is the head of the bpstat
2481 list - a list of the eventpoints that caused this stop. This
2482 routine calls the generic print routine for printing a message
2483 about reasons for stopping. This will print (for example) the
2484 "Breakpoint n," part of the output. The return value of this
2487 PRINT_UNKNOWN: Means we printed nothing
2488 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2489 code to print the location. An example is
2490 "Breakpoint 1, " which should be followed by
2492 PRINT_SRC_ONLY: Means we printed something, but there is no need
2493 to also print the location part of the message.
2494 An example is the catch/throw messages, which
2495 don't require a location appended to the end.
2496 PRINT_NOTHING: We have done some printing and we don't need any
2497 further info to be printed.*/
2499 enum print_stop_action
2500 bpstat_print (bpstat bs
)
2504 /* Maybe another breakpoint in the chain caused us to stop.
2505 (Currently all watchpoints go on the bpstat whether hit or not.
2506 That probably could (should) be changed, provided care is taken
2507 with respect to bpstat_explains_signal). */
2508 for (; bs
; bs
= bs
->next
)
2510 val
= print_bp_stop_message (bs
);
2511 if (val
== PRINT_SRC_ONLY
2512 || val
== PRINT_SRC_AND_LOC
2513 || val
== PRINT_NOTHING
)
2517 /* We reached the end of the chain, or we got a null BS to start
2518 with and nothing was printed. */
2519 return PRINT_UNKNOWN
;
2522 /* Evaluate the expression EXP and return 1 if value is zero.
2523 This is used inside a catch_errors to evaluate the breakpoint condition.
2524 The argument is a "struct expression *" that has been cast to char * to
2525 make it pass through catch_errors. */
2528 breakpoint_cond_eval (void *exp
)
2530 struct value
*mark
= value_mark ();
2531 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2532 value_free_to_mark (mark
);
2536 /* Allocate a new bpstat and chain it to the current one. */
2539 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2543 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2545 bs
->breakpoint_at
= bl
;
2546 /* If the condition is false, etc., don't do the commands. */
2547 bs
->commands
= NULL
;
2549 bs
->print_it
= print_it_normal
;
2553 /* The target has stopped with waitstatus WS. Check if any hardware
2554 watchpoints have triggered, according to the target. */
2557 watchpoints_triggered (struct target_waitstatus
*ws
)
2559 int stopped_by_watchpoint
= STOPPED_BY_WATCHPOINT (*ws
);
2561 struct breakpoint
*b
;
2563 if (!stopped_by_watchpoint
)
2565 /* We were not stopped by a watchpoint. Mark all watchpoints
2566 as not triggered. */
2568 if (b
->type
== bp_hardware_watchpoint
2569 || b
->type
== bp_read_watchpoint
2570 || b
->type
== bp_access_watchpoint
)
2571 b
->watchpoint_triggered
= watch_triggered_no
;
2576 if (!target_stopped_data_address (¤t_target
, &addr
))
2578 /* We were stopped by a watchpoint, but we don't know where.
2579 Mark all watchpoints as unknown. */
2581 if (b
->type
== bp_hardware_watchpoint
2582 || b
->type
== bp_read_watchpoint
2583 || b
->type
== bp_access_watchpoint
)
2584 b
->watchpoint_triggered
= watch_triggered_unknown
;
2586 return stopped_by_watchpoint
;
2589 /* The target could report the data address. Mark watchpoints
2590 affected by this data address as triggered, and all others as not
2594 if (b
->type
== bp_hardware_watchpoint
2595 || b
->type
== bp_read_watchpoint
2596 || b
->type
== bp_access_watchpoint
)
2598 struct bp_location
*loc
;
2601 b
->watchpoint_triggered
= watch_triggered_no
;
2602 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2603 /* Exact match not required. Within range is
2605 if (target_watchpoint_addr_within_range (¤t_target
,
2609 b
->watchpoint_triggered
= watch_triggered_yes
;
2617 /* Possible return values for watchpoint_check (this can't be an enum
2618 because of check_errors). */
2619 /* The watchpoint has been deleted. */
2620 #define WP_DELETED 1
2621 /* The value has changed. */
2622 #define WP_VALUE_CHANGED 2
2623 /* The value has not changed. */
2624 #define WP_VALUE_NOT_CHANGED 3
2626 #define BP_TEMPFLAG 1
2627 #define BP_HARDWAREFLAG 2
2629 /* Check watchpoint condition. */
2632 watchpoint_check (void *p
)
2634 bpstat bs
= (bpstat
) p
;
2635 struct breakpoint
*b
;
2636 struct frame_info
*fr
;
2637 int within_current_scope
;
2639 b
= bs
->breakpoint_at
->owner
;
2641 if (b
->exp_valid_block
== NULL
)
2642 within_current_scope
= 1;
2645 /* There is no current frame at this moment. If we're going to have
2646 any chance of handling watchpoints on local variables, we'll need
2647 the frame chain (so we can determine if we're in scope). */
2648 reinit_frame_cache ();
2649 fr
= frame_find_by_id (b
->watchpoint_frame
);
2650 within_current_scope
= (fr
!= NULL
);
2652 /* If we've gotten confused in the unwinder, we might have
2653 returned a frame that can't describe this variable. */
2654 if (within_current_scope
2655 && block_function (b
->exp_valid_block
) != get_frame_function (fr
))
2656 within_current_scope
= 0;
2658 /* in_function_epilogue_p() returns a non-zero value if we're still
2659 in the function but the stack frame has already been invalidated.
2660 Since we can't rely on the values of local variables after the
2661 stack has been destroyed, we are treating the watchpoint in that
2662 state as `not changed' without further checking.
2664 vinschen/2003-09-04: The former implementation left out the case
2665 that the watchpoint frame couldn't be found by frame_find_by_id()
2666 because the current PC is currently in an epilogue. Calling
2667 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2668 if ((!within_current_scope
|| fr
== get_current_frame ())
2669 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2670 return WP_VALUE_NOT_CHANGED
;
2671 if (fr
&& within_current_scope
)
2672 /* If we end up stopping, the current frame will get selected
2673 in normal_stop. So this call to select_frame won't affect
2678 if (within_current_scope
)
2680 /* We use value_{,free_to_}mark because it could be a
2681 *long* time before we return to the command level and
2682 call free_all_values. We can't call free_all_values because
2683 we might be in the middle of evaluating a function call. */
2685 struct value
*mark
= value_mark ();
2686 struct value
*new_val
;
2688 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2689 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2690 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2692 if (new_val
!= NULL
)
2694 release_value (new_val
);
2695 value_free_to_mark (mark
);
2697 bs
->old_val
= b
->val
;
2700 /* We will stop here */
2701 return WP_VALUE_CHANGED
;
2705 /* Nothing changed, don't do anything. */
2706 value_free_to_mark (mark
);
2707 /* We won't stop here */
2708 return WP_VALUE_NOT_CHANGED
;
2713 /* This seems like the only logical thing to do because
2714 if we temporarily ignored the watchpoint, then when
2715 we reenter the block in which it is valid it contains
2716 garbage (in the case of a function, it may have two
2717 garbage values, one before and one after the prologue).
2718 So we can't even detect the first assignment to it and
2719 watch after that (since the garbage may or may not equal
2720 the first value assigned). */
2721 /* We print all the stop information in print_it_typical(), but
2722 in this case, by the time we call print_it_typical() this bp
2723 will be deleted already. So we have no choice but print the
2724 information here. */
2725 if (ui_out_is_mi_like_p (uiout
))
2727 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2728 ui_out_text (uiout
, "\nWatchpoint ");
2729 ui_out_field_int (uiout
, "wpnum", b
->number
);
2730 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2731 which its expression is valid.\n");
2733 if (b
->related_breakpoint
)
2734 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2735 b
->disposition
= disp_del_at_next_stop
;
2741 /* Return true if it looks like target has stopped due to hitting
2742 breakpoint location BL. This function does not check if we
2743 should stop, only if BL explains the stop. */
2745 bpstat_check_location (const struct bp_location
*bl
, CORE_ADDR bp_addr
)
2747 struct breakpoint
*b
= bl
->owner
;
2749 if (b
->type
!= bp_watchpoint
2750 && b
->type
!= bp_hardware_watchpoint
2751 && b
->type
!= bp_read_watchpoint
2752 && b
->type
!= bp_access_watchpoint
2753 && b
->type
!= bp_hardware_breakpoint
2754 && b
->type
!= bp_catch_fork
2755 && b
->type
!= bp_catch_vfork
2756 && b
->type
!= bp_catch_exec
) /* a non-watchpoint bp */
2758 if (bl
->address
!= bp_addr
) /* address doesn't match */
2760 if (overlay_debugging
/* unmapped overlay section */
2761 && section_is_overlay (bl
->section
)
2762 && !section_is_mapped (bl
->section
))
2766 /* Continuable hardware watchpoints are treated as non-existent if the
2767 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2768 some data address). Otherwise gdb won't stop on a break instruction
2769 in the code (not from a breakpoint) when a hardware watchpoint has
2770 been defined. Also skip watchpoints which we know did not trigger
2771 (did not match the data address). */
2773 if ((b
->type
== bp_hardware_watchpoint
2774 || b
->type
== bp_read_watchpoint
2775 || b
->type
== bp_access_watchpoint
)
2776 && b
->watchpoint_triggered
== watch_triggered_no
)
2779 if (b
->type
== bp_hardware_breakpoint
)
2781 if (bl
->address
!= bp_addr
)
2783 if (overlay_debugging
/* unmapped overlay section */
2784 && section_is_overlay (bl
->section
)
2785 && !section_is_mapped (bl
->section
))
2789 /* Is this a catchpoint of a load or unload? If so, did we
2790 get a load or unload of the specified library? If not,
2792 if ((b
->type
== bp_catch_load
)
2793 #if defined(SOLIB_HAVE_LOAD_EVENT)
2794 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2795 || ((b
->dll_pathname
!= NULL
)
2796 && (strcmp (b
->dll_pathname
,
2797 SOLIB_LOADED_LIBRARY_PATHNAME (
2798 PIDGET (inferior_ptid
)))
2804 if ((b
->type
== bp_catch_unload
)
2805 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2806 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2807 || ((b
->dll_pathname
!= NULL
)
2808 && (strcmp (b
->dll_pathname
,
2809 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2810 PIDGET (inferior_ptid
)))
2816 if ((b
->type
== bp_catch_fork
)
2817 && !inferior_has_forked (PIDGET (inferior_ptid
),
2818 &b
->forked_inferior_pid
))
2821 if ((b
->type
== bp_catch_vfork
)
2822 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2823 &b
->forked_inferior_pid
))
2826 if ((b
->type
== bp_catch_exec
)
2827 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2833 /* If BS refers to a watchpoint, determine if the watched values
2834 has actually changed, and we should stop. If not, set BS->stop
2837 bpstat_check_watchpoint (bpstat bs
)
2839 const struct bp_location
*bl
= bs
->breakpoint_at
;
2840 struct breakpoint
*b
= bl
->owner
;
2842 if (b
->type
== bp_watchpoint
2843 || b
->type
== bp_read_watchpoint
2844 || b
->type
== bp_access_watchpoint
2845 || b
->type
== bp_hardware_watchpoint
)
2849 int must_check_value
= 0;
2851 if (b
->type
== bp_watchpoint
)
2852 /* For a software watchpoint, we must always check the
2854 must_check_value
= 1;
2855 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2856 /* We have a hardware watchpoint (read, write, or access)
2857 and the target earlier reported an address watched by
2859 must_check_value
= 1;
2860 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2861 && b
->type
== bp_hardware_watchpoint
)
2862 /* We were stopped by a hardware watchpoint, but the target could
2863 not report the data address. We must check the watchpoint's
2864 value. Access and read watchpoints are out of luck; without
2865 a data address, we can't figure it out. */
2866 must_check_value
= 1;
2868 if (must_check_value
)
2870 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2872 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2873 int e
= catch_errors (watchpoint_check
, bs
, message
,
2875 do_cleanups (cleanups
);
2879 /* We've already printed what needs to be printed. */
2880 bs
->print_it
= print_it_done
;
2883 case WP_VALUE_CHANGED
:
2884 if (b
->type
== bp_read_watchpoint
)
2886 /* Don't stop: read watchpoints shouldn't fire if
2887 the value has changed. This is for targets
2888 which cannot set read-only watchpoints. */
2889 bs
->print_it
= print_it_noop
;
2893 case WP_VALUE_NOT_CHANGED
:
2894 if (b
->type
== bp_hardware_watchpoint
2895 || b
->type
== bp_watchpoint
)
2897 /* Don't stop: write watchpoints shouldn't fire if
2898 the value hasn't changed. */
2899 bs
->print_it
= print_it_noop
;
2907 /* Error from catch_errors. */
2908 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2909 if (b
->related_breakpoint
)
2910 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2911 b
->disposition
= disp_del_at_next_stop
;
2912 /* We've already printed what needs to be printed. */
2913 bs
->print_it
= print_it_done
;
2917 else /* must_check_value == 0 */
2919 /* This is a case where some watchpoint(s) triggered, but
2920 not at the address of this watchpoint, or else no
2921 watchpoint triggered after all. So don't print
2922 anything for this watchpoint. */
2923 bs
->print_it
= print_it_noop
;
2930 /* Check conditions (condition proper, frame, thread and ignore count)
2931 of breakpoint referred to by BS. If we should not stop for this
2932 breakpoint, set BS->stop to 0. */
2934 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
2936 int thread_id
= pid_to_thread_id (ptid
);
2937 const struct bp_location
*bl
= bs
->breakpoint_at
;
2938 struct breakpoint
*b
= bl
->owner
;
2940 if (frame_id_p (b
->frame_id
)
2941 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2945 int value_is_zero
= 0;
2947 /* If this is a scope breakpoint, mark the associated
2948 watchpoint as triggered so that we will handle the
2949 out-of-scope event. We'll get to the watchpoint next
2951 if (b
->type
== bp_watchpoint_scope
)
2952 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
2954 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
2956 /* Need to select the frame, with all that implies
2957 so that the conditions will have the right context. */
2958 select_frame (get_current_frame ());
2960 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
2961 "Error in testing breakpoint condition:\n",
2963 /* FIXME-someday, should give breakpoint # */
2966 if (bl
->cond
&& value_is_zero
)
2970 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2974 else if (b
->ignore_count
> 0)
2977 annotate_ignore_count_change ();
2979 /* Increase the hit count even though we don't
2987 /* Get a bpstat associated with having just stopped at address
2988 BP_ADDR in thread PTID.
2990 Determine whether we stopped at a breakpoint, etc, or whether we
2991 don't understand this stop. Result is a chain of bpstat's such that:
2993 if we don't understand the stop, the result is a null pointer.
2995 if we understand why we stopped, the result is not null.
2997 Each element of the chain refers to a particular breakpoint or
2998 watchpoint at which we have stopped. (We may have stopped for
2999 several reasons concurrently.)
3001 Each element of the chain has valid next, breakpoint_at,
3002 commands, FIXME??? fields. */
3005 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
3007 struct breakpoint
*b
= NULL
;
3008 const struct bp_location
*bl
;
3009 /* Root of the chain of bpstat's */
3010 struct bpstats root_bs
[1];
3011 /* Pointer to the last thing in the chain currently. */
3012 bpstat bs
= root_bs
;
3014 ALL_BP_LOCATIONS (bl
)
3018 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
3021 /* For hardware watchpoints, we look only at the first location.
3022 The watchpoint_check function will work on entire expression,
3023 not the individual locations. For read watchopints, the
3024 watchpoints_triggered function have checked all locations
3027 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
3030 if (!bpstat_check_location (bl
, bp_addr
))
3033 /* Come here if it's a watchpoint, or if the break address matches */
3035 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
3037 /* Assume we stop. Should we find watchpoint that is not actually
3038 triggered, or if condition of breakpoint is false, we'll reset
3043 bpstat_check_watchpoint (bs
);
3047 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
3048 /* We do not stop for these. */
3051 bpstat_check_breakpoint_conditions (bs
, ptid
);
3057 /* We will stop here */
3058 if (b
->disposition
== disp_disable
)
3060 b
->enable_state
= bp_disabled
;
3061 update_global_location_list ();
3065 bs
->commands
= b
->commands
;
3067 (strcmp ("silent", bs
->commands
->line
) == 0
3068 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3070 bs
->commands
= bs
->commands
->next
;
3073 bs
->commands
= copy_command_lines (bs
->commands
);
3076 /* Print nothing for this entry if we dont stop or if we dont print. */
3077 if (bs
->stop
== 0 || bs
->print
== 0)
3078 bs
->print_it
= print_it_noop
;
3081 bs
->next
= NULL
; /* Terminate the chain */
3082 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3084 /* If we aren't stopping, the value of some hardware watchpoint may
3085 not have changed, but the intermediate memory locations we are
3086 watching may have. Don't bother if we're stopping; this will get
3088 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3093 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3095 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3096 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3097 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3099 /* remove/insert can invalidate bs->breakpoint_at, if this
3100 location is no longer used by the watchpoint. Prevent
3101 further code from trying to use it. */
3102 bs
->breakpoint_at
= NULL
;
3103 remove_breakpoints ();
3104 insert_breakpoints ();
3108 return root_bs
->next
;
3111 /* Tell what to do about this bpstat. */
3113 bpstat_what (bpstat bs
)
3115 /* Classify each bpstat as one of the following. */
3118 /* This bpstat element has no effect on the main_action. */
3121 /* There was a watchpoint, stop but don't print. */
3124 /* There was a watchpoint, stop and print. */
3127 /* There was a breakpoint but we're not stopping. */
3130 /* There was a breakpoint, stop but don't print. */
3133 /* There was a breakpoint, stop and print. */
3136 /* We hit the longjmp breakpoint. */
3139 /* We hit the longjmp_resume breakpoint. */
3142 /* We hit the step_resume breakpoint. */
3145 /* We hit the shared library event breakpoint. */
3148 /* We caught a shared library event. */
3151 /* This is just used to count how many enums there are. */
3155 /* Here is the table which drives this routine. So that we can
3156 format it pretty, we define some abbreviations for the
3157 enum bpstat_what codes. */
3158 #define kc BPSTAT_WHAT_KEEP_CHECKING
3159 #define ss BPSTAT_WHAT_STOP_SILENT
3160 #define sn BPSTAT_WHAT_STOP_NOISY
3161 #define sgl BPSTAT_WHAT_SINGLE
3162 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3163 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3164 #define sr BPSTAT_WHAT_STEP_RESUME
3165 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3166 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
3168 /* "Can't happen." Might want to print an error message.
3169 abort() is not out of the question, but chances are GDB is just
3170 a bit confused, not unusable. */
3171 #define err BPSTAT_WHAT_STOP_NOISY
3173 /* Given an old action and a class, come up with a new action. */
3174 /* One interesting property of this table is that wp_silent is the same
3175 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3176 after stopping, the check for whether to step over a breakpoint
3177 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3178 reference to how we stopped. We retain separate wp_silent and
3179 bp_silent codes in case we want to change that someday.
3181 Another possibly interesting property of this table is that
3182 there's a partial ordering, priority-like, of the actions. Once
3183 you've decided that some action is appropriate, you'll never go
3184 back and decide something of a lower priority is better. The
3187 kc < clr sgl shl shlr slr sn sr ss
3188 sgl < shl shlr slr sn sr ss
3189 slr < err shl shlr sn sr ss
3190 clr < err shl shlr sn sr ss
3197 What I think this means is that we don't need a damned table
3198 here. If you just put the rows and columns in the right order,
3199 it'd look awfully regular. We could simply walk the bpstat list
3200 and choose the highest priority action we find, with a little
3201 logic to handle the 'err' cases. */
3203 /* step_resume entries: a step resume breakpoint overrides another
3204 breakpoint of signal handling (see comment in wait_for_inferior
3205 at where we set the step_resume breakpoint). */
3207 static const enum bpstat_what_main_action
3208 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3211 /* kc ss sn sgl slr clr sr shl shlr
3214 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
, shlr
},
3216 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
, shlr
},
3218 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3220 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
, shlr
},
3222 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
, shlr
},
3224 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
, shlr
},
3226 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
, shlr
},
3228 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
, shlr
},
3230 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3232 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
, shlr
},
3234 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, sr
, shlr
, shlr
}
3248 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3249 struct bpstat_what retval
;
3251 retval
.call_dummy
= 0;
3252 for (; bs
!= NULL
; bs
= bs
->next
)
3254 enum class bs_class
= no_effect
;
3255 if (bs
->breakpoint_at
== NULL
)
3256 /* I suspect this can happen if it was a momentary breakpoint
3257 which has since been deleted. */
3259 switch (bs
->breakpoint_at
->owner
->type
)
3265 case bp_hardware_breakpoint
:
3271 bs_class
= bp_noisy
;
3273 bs_class
= bp_silent
;
3276 bs_class
= bp_nostop
;
3279 case bp_hardware_watchpoint
:
3280 case bp_read_watchpoint
:
3281 case bp_access_watchpoint
:
3285 bs_class
= wp_noisy
;
3287 bs_class
= wp_silent
;
3290 /* There was a watchpoint, but we're not stopping.
3291 This requires no further action. */
3292 bs_class
= no_effect
;
3295 bs_class
= long_jump
;
3297 case bp_longjmp_resume
:
3298 bs_class
= long_resume
;
3300 case bp_step_resume
:
3303 bs_class
= step_resume
;
3306 /* It is for the wrong frame. */
3307 bs_class
= bp_nostop
;
3309 case bp_watchpoint_scope
:
3310 bs_class
= bp_nostop
;
3312 case bp_shlib_event
:
3313 bs_class
= shlib_event
;
3315 case bp_thread_event
:
3316 case bp_overlay_event
:
3317 bs_class
= bp_nostop
;
3320 case bp_catch_unload
:
3321 /* Only if this catchpoint triggered should we cause the
3322 step-out-of-dld behaviour. Otherwise, we ignore this
3325 bs_class
= catch_shlib_event
;
3327 bs_class
= no_effect
;
3330 case bp_catch_vfork
:
3335 bs_class
= bp_noisy
;
3337 bs_class
= bp_silent
;
3340 /* There was a catchpoint, but we're not stopping.
3341 This requires no further action. */
3342 bs_class
= no_effect
;
3345 /* Make sure the action is stop (silent or noisy),
3346 so infrun.c pops the dummy frame. */
3347 bs_class
= bp_silent
;
3348 retval
.call_dummy
= 1;
3351 current_action
= table
[(int) bs_class
][(int) current_action
];
3353 retval
.main_action
= current_action
;
3357 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3358 without hardware support). This isn't related to a specific bpstat,
3359 just to things like whether watchpoints are set. */
3362 bpstat_should_step (void)
3364 struct breakpoint
*b
;
3366 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3373 /* Given a bpstat that records zero or more triggered eventpoints, this
3374 function returns another bpstat which contains only the catchpoints
3375 on that first list, if any. */
3377 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3379 struct bpstats root_bs
[1];
3380 bpstat bs
= root_bs
;
3381 struct breakpoint
*ep
;
3384 bpstat_clear (cp_list
);
3385 root_bs
->next
= NULL
;
3387 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3389 /* Is this eventpoint a catchpoint? If not, ignore it. */
3390 ep
= ep_list
->breakpoint_at
->owner
;
3393 if ((ep
->type
!= bp_catch_load
) &&
3394 (ep
->type
!= bp_catch_unload
))
3395 /* pai: (temp) ADD fork/vfork here!! */
3398 /* Yes; add it to the list. */
3399 bs
= bpstat_alloc (ep_list
->breakpoint_at
, bs
);
3404 #if defined(SOLIB_ADD)
3405 /* Also, for each triggered catchpoint, tag it with the name of
3406 the library that caused this trigger. (We copy the name now,
3407 because it's only guaranteed to be available NOW, when the
3408 catchpoint triggers. Clients who may wish to know the name
3409 later must get it from the catchpoint itself.) */
3410 if (ep
->triggered_dll_pathname
!= NULL
)
3411 xfree (ep
->triggered_dll_pathname
);
3412 if (ep
->type
== bp_catch_load
)
3413 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3414 PIDGET (inferior_ptid
));
3416 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3417 PIDGET (inferior_ptid
));
3419 dll_pathname
= NULL
;
3423 ep
->triggered_dll_pathname
= (char *)
3424 xmalloc (strlen (dll_pathname
) + 1);
3425 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3428 ep
->triggered_dll_pathname
= NULL
;
3434 static void print_breakpoint_location (struct breakpoint
*b
,
3435 struct bp_location
*loc
,
3437 struct ui_stream
*stb
)
3442 = find_pc_sect_function (loc
->address
, loc
->section
);
3445 ui_out_text (uiout
, "in ");
3446 ui_out_field_string (uiout
, "func",
3447 SYMBOL_PRINT_NAME (sym
));
3448 ui_out_wrap_hint (uiout
, wrap_indent
);
3449 ui_out_text (uiout
, " at ");
3451 ui_out_field_string (uiout
, "file", b
->source_file
);
3452 ui_out_text (uiout
, ":");
3454 if (ui_out_is_mi_like_p (uiout
))
3456 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3457 char *fullname
= symtab_to_fullname (sal
.symtab
);
3460 ui_out_field_string (uiout
, "fullname", fullname
);
3463 ui_out_field_int (uiout
, "line", b
->line_number
);
3467 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3471 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3472 ui_out_field_stream (uiout
, "at", stb
);
3476 /* Print B to gdb_stdout. */
3478 print_one_breakpoint_location (struct breakpoint
*b
,
3479 struct bp_location
*loc
,
3481 CORE_ADDR
*last_addr
)
3483 struct command_line
*l
;
3485 struct ep_type_description
3490 static struct ep_type_description bptypes
[] =
3492 {bp_none
, "?deleted?"},
3493 {bp_breakpoint
, "breakpoint"},
3494 {bp_hardware_breakpoint
, "hw breakpoint"},
3495 {bp_until
, "until"},
3496 {bp_finish
, "finish"},
3497 {bp_watchpoint
, "watchpoint"},
3498 {bp_hardware_watchpoint
, "hw watchpoint"},
3499 {bp_read_watchpoint
, "read watchpoint"},
3500 {bp_access_watchpoint
, "acc watchpoint"},
3501 {bp_longjmp
, "longjmp"},
3502 {bp_longjmp_resume
, "longjmp resume"},
3503 {bp_step_resume
, "step resume"},
3504 {bp_watchpoint_scope
, "watchpoint scope"},
3505 {bp_call_dummy
, "call dummy"},
3506 {bp_shlib_event
, "shlib events"},
3507 {bp_thread_event
, "thread events"},
3508 {bp_overlay_event
, "overlay events"},
3509 {bp_catch_load
, "catch load"},
3510 {bp_catch_unload
, "catch unload"},
3511 {bp_catch_fork
, "catch fork"},
3512 {bp_catch_vfork
, "catch vfork"},
3513 {bp_catch_exec
, "catch exec"}
3516 static char bpenables
[] = "nynny";
3517 char wrap_indent
[80];
3518 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3519 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3520 struct cleanup
*bkpt_chain
;
3522 int header_of_multiple
= 0;
3523 int part_of_multiple
= (loc
!= NULL
);
3525 gdb_assert (!loc
|| loc_number
!= 0);
3526 /* See comment in print_one_breakpoint concerning
3527 treatment of breakpoints with single disabled
3531 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3532 header_of_multiple
= 1;
3537 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3541 if (part_of_multiple
)
3544 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3545 ui_out_field_string (uiout
, "number", formatted
);
3550 ui_out_field_int (uiout
, "number", b
->number
);
3555 if (part_of_multiple
)
3556 ui_out_field_skip (uiout
, "type");
3559 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3560 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3561 internal_error (__FILE__
, __LINE__
,
3562 _("bptypes table does not describe type #%d."),
3564 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3569 if (part_of_multiple
)
3570 ui_out_field_skip (uiout
, "disp");
3572 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3577 if (part_of_multiple
)
3578 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3580 ui_out_field_fmt (uiout
, "enabled", "%c",
3581 bpenables
[(int) b
->enable_state
]);
3582 ui_out_spaces (uiout
, 2);
3586 strcpy (wrap_indent
, " ");
3589 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3590 strcat (wrap_indent
, " ");
3592 strcat (wrap_indent
, " ");
3595 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3597 /* Although the print_one can possibly print
3598 all locations, calling it here is not likely
3599 to get any nice result. So, make sure there's
3600 just one location. */
3601 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3602 b
->ops
->print_one (b
, last_addr
);
3608 internal_error (__FILE__
, __LINE__
,
3609 _("print_one_breakpoint: bp_none encountered\n"));
3613 case bp_hardware_watchpoint
:
3614 case bp_read_watchpoint
:
3615 case bp_access_watchpoint
:
3616 /* Field 4, the address, is omitted (which makes the columns
3617 not line up too nicely with the headers, but the effect
3618 is relatively readable). */
3620 ui_out_field_skip (uiout
, "addr");
3622 print_expression (b
->exp
, stb
->stream
);
3623 ui_out_field_stream (uiout
, "what", stb
);
3627 case bp_catch_unload
:
3628 /* Field 4, the address, is omitted (which makes the columns
3629 not line up too nicely with the headers, but the effect
3630 is relatively readable). */
3632 ui_out_field_skip (uiout
, "addr");
3634 if (b
->dll_pathname
== NULL
)
3636 ui_out_field_string (uiout
, "what", "<any library>");
3637 ui_out_spaces (uiout
, 1);
3641 ui_out_text (uiout
, "library \"");
3642 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3643 ui_out_text (uiout
, "\" ");
3648 case bp_catch_vfork
:
3649 /* Field 4, the address, is omitted (which makes the columns
3650 not line up too nicely with the headers, but the effect
3651 is relatively readable). */
3653 ui_out_field_skip (uiout
, "addr");
3655 if (b
->forked_inferior_pid
!= 0)
3657 ui_out_text (uiout
, "process ");
3658 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3659 ui_out_spaces (uiout
, 1);
3664 /* Field 4, the address, is omitted (which makes the columns
3665 not line up too nicely with the headers, but the effect
3666 is relatively readable). */
3668 ui_out_field_skip (uiout
, "addr");
3670 if (b
->exec_pathname
!= NULL
)
3672 ui_out_text (uiout
, "program \"");
3673 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3674 ui_out_text (uiout
, "\" ");
3679 case bp_hardware_breakpoint
:
3683 case bp_longjmp_resume
:
3684 case bp_step_resume
:
3685 case bp_watchpoint_scope
:
3687 case bp_shlib_event
:
3688 case bp_thread_event
:
3689 case bp_overlay_event
:
3693 if (header_of_multiple
)
3694 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3695 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3696 ui_out_field_string (uiout
, "addr", "<PENDING>");
3698 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3701 if (!header_of_multiple
)
3702 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3704 *last_addr
= b
->loc
->address
;
3708 if (!part_of_multiple
&& b
->thread
!= -1)
3710 /* FIXME: This seems to be redundant and lost here; see the
3711 "stop only in" line a little further down. */
3712 ui_out_text (uiout
, " thread ");
3713 ui_out_field_int (uiout
, "thread", b
->thread
);
3716 ui_out_text (uiout
, "\n");
3718 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3721 ui_out_text (uiout
, "\tstop only in stack frame at ");
3722 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3724 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3725 ui_out_text (uiout
, "\n");
3728 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3730 /* We do not print the condition for Ada exception catchpoints
3731 because the condition is an internal implementation detail
3732 that we do not want to expose to the user. */
3734 ui_out_text (uiout
, "\tstop only if ");
3735 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3736 ui_out_text (uiout
, "\n");
3739 if (!part_of_multiple
&& b
->thread
!= -1)
3741 /* FIXME should make an annotation for this */
3742 ui_out_text (uiout
, "\tstop only in thread ");
3743 ui_out_field_int (uiout
, "thread", b
->thread
);
3744 ui_out_text (uiout
, "\n");
3747 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
)
3749 /* FIXME should make an annotation for this */
3750 if (ep_is_catchpoint (b
))
3751 ui_out_text (uiout
, "\tcatchpoint");
3753 ui_out_text (uiout
, "\tbreakpoint");
3754 ui_out_text (uiout
, " already hit ");
3755 ui_out_field_int (uiout
, "times", b
->hit_count
);
3756 if (b
->hit_count
== 1)
3757 ui_out_text (uiout
, " time\n");
3759 ui_out_text (uiout
, " times\n");
3762 /* Output the count also if it is zero, but only if this is
3763 mi. FIXME: Should have a better test for this. */
3764 if (ui_out_is_mi_like_p (uiout
))
3765 if (!part_of_multiple
&& show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3766 ui_out_field_int (uiout
, "times", b
->hit_count
);
3768 if (!part_of_multiple
&& b
->ignore_count
)
3771 ui_out_text (uiout
, "\tignore next ");
3772 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3773 ui_out_text (uiout
, " hits\n");
3776 if (!part_of_multiple
&& (l
= b
->commands
))
3778 struct cleanup
*script_chain
;
3781 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3782 print_command_lines (uiout
, l
, 4);
3783 do_cleanups (script_chain
);
3786 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3789 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3790 else if (b
->exp_string
)
3791 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3794 do_cleanups (bkpt_chain
);
3795 do_cleanups (old_chain
);
3799 print_one_breakpoint (struct breakpoint
*b
,
3800 CORE_ADDR
*last_addr
)
3802 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3804 /* If this breakpoint has custom print function,
3805 it's already printed. Otherwise, print individual
3806 locations, if any. */
3807 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3809 /* If breakpoint has a single location that is
3810 disabled, we print it as if it had
3811 several locations, since otherwise it's hard to
3812 represent "breakpoint enabled, location disabled"
3814 Note that while hardware watchpoints have
3815 several locations internally, that's no a property
3818 && !is_hardware_watchpoint (b
)
3819 && (b
->loc
->next
|| !b
->loc
->enabled
)
3820 && !ui_out_is_mi_like_p (uiout
))
3822 struct bp_location
*loc
;
3824 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3825 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3831 struct captured_breakpoint_query_args
3837 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3839 struct captured_breakpoint_query_args
*args
= data
;
3840 struct breakpoint
*b
;
3841 CORE_ADDR dummy_addr
= 0;
3844 if (args
->bnum
== b
->number
)
3846 print_one_breakpoint (b
, &dummy_addr
);
3854 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3856 struct captured_breakpoint_query_args args
;
3858 /* For the moment we don't trust print_one_breakpoint() to not throw
3860 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3861 error_message
, RETURN_MASK_ALL
) < 0)
3867 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3868 catchpoints, et.al.). */
3871 user_settable_breakpoint (const struct breakpoint
*b
)
3873 return (b
->type
== bp_breakpoint
3874 || b
->type
== bp_catch_load
3875 || b
->type
== bp_catch_unload
3876 || b
->type
== bp_catch_fork
3877 || b
->type
== bp_catch_vfork
3878 || b
->type
== bp_catch_exec
3879 || b
->type
== bp_hardware_breakpoint
3880 || b
->type
== bp_watchpoint
3881 || b
->type
== bp_read_watchpoint
3882 || b
->type
== bp_access_watchpoint
3883 || b
->type
== bp_hardware_watchpoint
);
3886 /* Print information on user settable breakpoint (watchpoint, etc)
3887 number BNUM. If BNUM is -1 print all user settable breakpoints.
3888 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3891 breakpoint_1 (int bnum
, int allflag
)
3893 struct breakpoint
*b
;
3894 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3895 int nr_printable_breakpoints
;
3896 struct cleanup
*bkpttbl_chain
;
3898 /* Compute the number of rows in the table. */
3899 nr_printable_breakpoints
= 0;
3902 || bnum
== b
->number
)
3904 if (allflag
|| user_settable_breakpoint (b
))
3905 nr_printable_breakpoints
++;
3910 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3914 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3917 if (nr_printable_breakpoints
> 0)
3918 annotate_breakpoints_headers ();
3919 if (nr_printable_breakpoints
> 0)
3921 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3922 if (nr_printable_breakpoints
> 0)
3924 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3925 if (nr_printable_breakpoints
> 0)
3927 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3928 if (nr_printable_breakpoints
> 0)
3930 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3933 if (nr_printable_breakpoints
> 0)
3935 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3936 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3938 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3940 if (nr_printable_breakpoints
> 0)
3942 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3943 ui_out_table_body (uiout
);
3944 if (nr_printable_breakpoints
> 0)
3945 annotate_breakpoints_table ();
3949 || bnum
== b
->number
)
3951 /* We only print out user settable breakpoints unless the
3953 if (allflag
|| user_settable_breakpoint (b
))
3954 print_one_breakpoint (b
, &last_addr
);
3957 do_cleanups (bkpttbl_chain
);
3959 if (nr_printable_breakpoints
== 0)
3962 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3964 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3969 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3970 that a comparison of an unsigned with -1 is always false. */
3971 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3972 set_next_address (last_addr
);
3975 /* FIXME? Should this be moved up so that it is only called when
3976 there have been breakpoints? */
3977 annotate_breakpoints_table_end ();
3981 breakpoints_info (char *bnum_exp
, int from_tty
)
3986 bnum
= parse_and_eval_long (bnum_exp
);
3988 breakpoint_1 (bnum
, 0);
3992 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3997 bnum
= parse_and_eval_long (bnum_exp
);
3999 breakpoint_1 (bnum
, 1);
4003 breakpoint_has_pc (struct breakpoint
*b
, CORE_ADDR pc
, asection
*section
)
4005 struct bp_location
*bl
= b
->loc
;
4006 for (; bl
; bl
= bl
->next
)
4008 if (bl
->address
== pc
4009 && (!overlay_debugging
|| bl
->section
== section
))
4015 /* Print a message describing any breakpoints set at PC. */
4018 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
, int thread
)
4021 struct breakpoint
*b
;
4024 others
+= breakpoint_has_pc (b
, pc
, section
);
4028 printf_filtered (_("Note: breakpoint "));
4029 else /* if (others == ???) */
4030 printf_filtered (_("Note: breakpoints "));
4032 if (breakpoint_has_pc (b
, pc
, section
))
4035 printf_filtered ("%d", b
->number
);
4036 if (b
->thread
== -1 && thread
!= -1)
4037 printf_filtered (" (all threads)");
4038 else if (b
->thread
!= -1)
4039 printf_filtered (" (thread %d)", b
->thread
);
4040 printf_filtered ("%s%s ",
4041 ((b
->enable_state
== bp_disabled
||
4042 b
->enable_state
== bp_call_disabled
)
4044 : b
->enable_state
== bp_permanent
4048 : ((others
== 1) ? " and" : ""));
4050 printf_filtered (_("also set at pc "));
4051 fputs_filtered (paddress (pc
), gdb_stdout
);
4052 printf_filtered (".\n");
4056 /* Set the default place to put a breakpoint
4057 for the `break' command with no arguments. */
4060 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
4063 default_breakpoint_valid
= valid
;
4064 default_breakpoint_address
= addr
;
4065 default_breakpoint_symtab
= symtab
;
4066 default_breakpoint_line
= line
;
4069 /* Return true iff it is meaningful to use the address member of
4070 BPT. For some breakpoint types, the address member is irrelevant
4071 and it makes no sense to attempt to compare it to other addresses
4072 (or use it for any other purpose either).
4074 More specifically, each of the following breakpoint types will always
4075 have a zero valued address and we don't want check_duplicates() to mark
4076 breakpoints of any of these types to be a duplicate of an actual
4077 breakpoint at address zero:
4080 bp_hardware_watchpoint
4082 bp_access_watchpoint
4089 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
4091 enum bptype type
= bpt
->type
;
4093 return (type
!= bp_watchpoint
4094 && type
!= bp_hardware_watchpoint
4095 && type
!= bp_read_watchpoint
4096 && type
!= bp_access_watchpoint
4097 && type
!= bp_catch_exec
4098 && type
!= bp_longjmp_resume
4099 && type
!= bp_catch_fork
4100 && type
!= bp_catch_vfork
);
4103 /* Rescan breakpoints at the same address and section as BPT,
4104 marking the first one as "first" and any others as "duplicates".
4105 This is so that the bpt instruction is only inserted once.
4106 If we have a permanent breakpoint at the same place as BPT, make
4107 that one the official one, and the rest as duplicates. */
4110 check_duplicates_for (CORE_ADDR address
, asection
*section
)
4112 struct bp_location
*b
;
4114 struct bp_location
*perm_bp
= 0;
4116 ALL_BP_LOCATIONS (b
)
4117 if (b
->owner
->enable_state
!= bp_disabled
4118 && b
->owner
->enable_state
!= bp_call_disabled
4120 && !b
->shlib_disabled
4121 && b
->address
== address
/* address / overlay match */
4122 && (!overlay_debugging
|| b
->section
== section
)
4123 && breakpoint_address_is_meaningful (b
->owner
))
4125 /* Have we found a permanent breakpoint? */
4126 if (b
->owner
->enable_state
== bp_permanent
)
4133 b
->duplicate
= count
> 1;
4136 /* If we found a permanent breakpoint at this address, go over the
4137 list again and declare all the other breakpoints there to be the
4141 perm_bp
->duplicate
= 0;
4143 /* Permanent breakpoint should always be inserted. */
4144 if (! perm_bp
->inserted
)
4145 internal_error (__FILE__
, __LINE__
,
4146 _("allegedly permanent breakpoint is not "
4147 "actually inserted"));
4149 ALL_BP_LOCATIONS (b
)
4152 if (b
->owner
->enable_state
!= bp_disabled
4153 && b
->owner
->enable_state
!= bp_call_disabled
4154 && b
->enabled
&& !b
->shlib_disabled
4155 && b
->address
== address
/* address / overlay match */
4156 && (!overlay_debugging
|| b
->section
== section
)
4157 && breakpoint_address_is_meaningful (b
->owner
))
4160 internal_error (__FILE__
, __LINE__
,
4161 _("another breakpoint was inserted on top of "
4162 "a permanent breakpoint"));
4171 check_duplicates (struct breakpoint
*bpt
)
4173 struct bp_location
*bl
= bpt
->loc
;
4175 if (! breakpoint_address_is_meaningful (bpt
))
4178 for (; bl
; bl
= bl
->next
)
4179 check_duplicates_for (bl
->address
, bl
->section
);
4183 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4184 int bnum
, int have_bnum
)
4189 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4190 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4192 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4193 bnum
, astr1
, astr2
);
4195 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4198 /* Adjust a breakpoint's address to account for architectural constraints
4199 on breakpoint placement. Return the adjusted address. Note: Very
4200 few targets require this kind of adjustment. For most targets,
4201 this function is simply the identity function. */
4204 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4206 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4208 /* Very few targets need any kind of breakpoint adjustment. */
4211 else if (bptype
== bp_watchpoint
4212 || bptype
== bp_hardware_watchpoint
4213 || bptype
== bp_read_watchpoint
4214 || bptype
== bp_access_watchpoint
4215 || bptype
== bp_catch_fork
4216 || bptype
== bp_catch_vfork
4217 || bptype
== bp_catch_exec
)
4219 /* Watchpoints and the various bp_catch_* eventpoints should not
4220 have their addresses modified. */
4225 CORE_ADDR adjusted_bpaddr
;
4227 /* Some targets have architectural constraints on the placement
4228 of breakpoint instructions. Obtain the adjusted address. */
4229 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4232 /* An adjusted breakpoint address can significantly alter
4233 a user's expectations. Print a warning if an adjustment
4235 if (adjusted_bpaddr
!= bpaddr
)
4236 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4238 return adjusted_bpaddr
;
4242 /* Allocate a struct bp_location. */
4244 static struct bp_location
*
4245 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
4247 struct bp_location
*loc
, *loc_p
;
4249 loc
= xmalloc (sizeof (struct bp_location
));
4250 memset (loc
, 0, sizeof (*loc
));
4254 loc
->shlib_disabled
= 0;
4263 case bp_longjmp_resume
:
4264 case bp_step_resume
:
4265 case bp_watchpoint_scope
:
4267 case bp_shlib_event
:
4268 case bp_thread_event
:
4269 case bp_overlay_event
:
4271 case bp_catch_unload
:
4272 loc
->loc_type
= bp_loc_software_breakpoint
;
4274 case bp_hardware_breakpoint
:
4275 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4277 case bp_hardware_watchpoint
:
4278 case bp_read_watchpoint
:
4279 case bp_access_watchpoint
:
4280 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4284 case bp_catch_vfork
:
4286 loc
->loc_type
= bp_loc_other
;
4289 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4295 static void free_bp_location (struct bp_location
*loc
)
4300 if (loc
->function_name
)
4301 xfree (loc
->function_name
);
4306 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4307 that has type BPTYPE and has no locations as yet. */
4309 static struct breakpoint
*
4310 set_raw_breakpoint_without_location (enum bptype bptype
)
4312 struct breakpoint
*b
, *b1
;
4314 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4315 memset (b
, 0, sizeof (*b
));
4318 b
->language
= current_language
->la_language
;
4319 b
->input_radix
= input_radix
;
4321 b
->enable_state
= bp_enabled
;
4324 b
->ignore_count
= 0;
4326 b
->frame_id
= null_frame_id
;
4327 b
->dll_pathname
= NULL
;
4328 b
->triggered_dll_pathname
= NULL
;
4329 b
->forked_inferior_pid
= 0;
4330 b
->exec_pathname
= NULL
;
4332 b
->condition_not_parsed
= 0;
4334 /* Add this breakpoint to the end of the chain
4335 so that a list of breakpoints will come out in order
4336 of increasing numbers. */
4338 b1
= breakpoint_chain
;
4340 breakpoint_chain
= b
;
4350 /* Initialize loc->function_name. */
4352 set_breakpoint_location_function (struct bp_location
*loc
)
4354 if (loc
->owner
->type
== bp_breakpoint
4355 || loc
->owner
->type
== bp_hardware_breakpoint
)
4357 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4359 if (loc
->function_name
)
4360 loc
->function_name
= xstrdup (loc
->function_name
);
4364 /* set_raw_breakpoint is a low level routine for allocating and
4365 partially initializing a breakpoint of type BPTYPE. The newly
4366 created breakpoint's address, section, source file name, and line
4367 number are provided by SAL. The newly created and partially
4368 initialized breakpoint is added to the breakpoint chain and
4369 is also returned as the value of this function.
4371 It is expected that the caller will complete the initialization of
4372 the newly created breakpoint struct as well as output any status
4373 information regarding the creation of a new breakpoint. In
4374 particular, set_raw_breakpoint does NOT set the breakpoint
4375 number! Care should be taken to not allow an error to occur
4376 prior to completing the initialization of the breakpoint. If this
4377 should happen, a bogus breakpoint will be left on the chain. */
4380 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4382 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4383 CORE_ADDR adjusted_address
;
4385 /* Adjust the breakpoint's address prior to allocating a location.
4386 Once we call allocate_bp_location(), that mostly uninitialized
4387 location will be placed on the location chain. Adjustment of the
4388 breakpoint may cause target_read_memory() to be called and we do
4389 not want its scan of the location chain to find a breakpoint and
4390 location that's only been partially initialized. */
4391 adjusted_address
= adjust_breakpoint_address (sal
.pc
, bptype
);
4393 b
->loc
= allocate_bp_location (b
, bptype
);
4394 b
->loc
->requested_address
= sal
.pc
;
4395 b
->loc
->address
= adjusted_address
;
4397 if (sal
.symtab
== NULL
)
4398 b
->source_file
= NULL
;
4400 b
->source_file
= savestring (sal
.symtab
->filename
,
4401 strlen (sal
.symtab
->filename
));
4402 b
->loc
->section
= sal
.section
;
4403 b
->line_number
= sal
.line
;
4405 set_breakpoint_location_function (b
->loc
);
4407 breakpoints_changed ();
4413 /* Note that the breakpoint object B describes a permanent breakpoint
4414 instruction, hard-wired into the inferior's code. */
4416 make_breakpoint_permanent (struct breakpoint
*b
)
4418 struct bp_location
*bl
;
4419 b
->enable_state
= bp_permanent
;
4421 /* By definition, permanent breakpoints are already present in the code.
4422 Mark all locations as inserted. For now, make_breakpoint_permanent
4423 is called in just one place, so it's hard to say if it's reasonable
4424 to have permanent breakpoint with multiple locations or not,
4425 but it's easy to implmement. */
4426 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4430 static struct breakpoint
*
4431 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4433 static int internal_breakpoint_number
= -1;
4434 struct symtab_and_line sal
;
4435 struct breakpoint
*b
;
4437 init_sal (&sal
); /* initialize to zeroes */
4440 sal
.section
= find_pc_overlay (sal
.pc
);
4442 b
= set_raw_breakpoint (sal
, type
);
4443 b
->number
= internal_breakpoint_number
--;
4444 b
->disposition
= disp_donttouch
;
4451 create_longjmp_breakpoint (char *func_name
)
4453 struct breakpoint
*b
;
4454 struct minimal_symbol
*m
;
4456 if (func_name
== NULL
)
4457 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4460 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4463 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4466 b
->enable_state
= bp_disabled
;
4469 b
->addr_string
= xstrdup (func_name
);
4470 update_global_location_list ();
4473 /* Call this routine when stepping and nexting to enable a breakpoint
4474 if we do a longjmp(). When we hit that breakpoint, call
4475 set_longjmp_resume_breakpoint() to figure out where we are going. */
4478 enable_longjmp_breakpoint (void)
4480 struct breakpoint
*b
;
4483 if (b
->type
== bp_longjmp
)
4485 b
->enable_state
= bp_enabled
;
4486 update_global_location_list ();
4491 disable_longjmp_breakpoint (void)
4493 struct breakpoint
*b
;
4496 if (b
->type
== bp_longjmp
4497 || b
->type
== bp_longjmp_resume
)
4499 b
->enable_state
= bp_disabled
;
4500 update_global_location_list ();
4505 create_overlay_event_breakpoint (char *func_name
)
4507 struct breakpoint
*b
;
4508 struct minimal_symbol
*m
;
4510 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4513 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4515 b
->addr_string
= xstrdup (func_name
);
4517 if (overlay_debugging
== ovly_auto
)
4519 b
->enable_state
= bp_enabled
;
4520 overlay_events_enabled
= 1;
4524 b
->enable_state
= bp_disabled
;
4525 overlay_events_enabled
= 0;
4527 update_global_location_list ();
4531 enable_overlay_breakpoints (void)
4533 struct breakpoint
*b
;
4536 if (b
->type
== bp_overlay_event
)
4538 b
->enable_state
= bp_enabled
;
4539 update_global_location_list ();
4540 overlay_events_enabled
= 1;
4545 disable_overlay_breakpoints (void)
4547 struct breakpoint
*b
;
4550 if (b
->type
== bp_overlay_event
)
4552 b
->enable_state
= bp_disabled
;
4553 update_global_location_list ();
4554 overlay_events_enabled
= 0;
4559 create_thread_event_breakpoint (CORE_ADDR address
)
4561 struct breakpoint
*b
;
4563 b
= create_internal_breakpoint (address
, bp_thread_event
);
4565 b
->enable_state
= bp_enabled
;
4566 /* addr_string has to be used or breakpoint_re_set will delete me. */
4567 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4569 update_global_location_list_nothrow ();
4575 remove_thread_event_breakpoints (void)
4577 struct breakpoint
*b
, *temp
;
4579 ALL_BREAKPOINTS_SAFE (b
, temp
)
4580 if (b
->type
== bp_thread_event
)
4581 delete_breakpoint (b
);
4584 struct captured_parse_breakpoint_args
4587 struct symtabs_and_lines
*sals_p
;
4588 char ***addr_string_p
;
4592 struct lang_and_radix
4600 remove_solib_event_breakpoints (void)
4602 struct breakpoint
*b
, *temp
;
4604 ALL_BREAKPOINTS_SAFE (b
, temp
)
4605 if (b
->type
== bp_shlib_event
)
4606 delete_breakpoint (b
);
4610 create_solib_event_breakpoint (CORE_ADDR address
)
4612 struct breakpoint
*b
;
4614 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4615 update_global_location_list_nothrow ();
4619 /* Disable any breakpoints that are on code in shared libraries. Only
4620 apply to enabled breakpoints, disabled ones can just stay disabled. */
4623 disable_breakpoints_in_shlibs (void)
4625 struct bp_location
*loc
;
4626 int disabled_shlib_breaks
= 0;
4628 ALL_BP_LOCATIONS (loc
)
4630 struct breakpoint
*b
= loc
->owner
;
4631 /* We apply the check to all breakpoints, including disabled
4632 for those with loc->duplicate set. This is so that when breakpoint
4633 becomes enabled, or the duplicate is removed, gdb will try to insert
4634 all breakpoints. If we don't set shlib_disabled here, we'll try
4635 to insert those breakpoints and fail. */
4636 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4637 && !loc
->shlib_disabled
4639 && PC_SOLIB (loc
->address
)
4641 && solib_address (loc
->address
)
4645 loc
->shlib_disabled
= 1;
4650 /* Disable any breakpoints that are in in an unloaded shared library. Only
4651 apply to enabled breakpoints, disabled ones can just stay disabled. */
4654 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4656 struct bp_location
*loc
;
4657 int disabled_shlib_breaks
= 0;
4659 ALL_BP_LOCATIONS (loc
)
4661 struct breakpoint
*b
= loc
->owner
;
4662 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4663 || loc
->loc_type
== bp_loc_software_breakpoint
)
4664 && !loc
->shlib_disabled
)
4667 char *so_name
= PC_SOLIB (loc
->address
);
4669 char *so_name
= solib_address (loc
->address
);
4671 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4673 loc
->shlib_disabled
= 1;
4674 /* At this point, we cannot rely on remove_breakpoint
4675 succeeding so we must mark the breakpoint as not inserted
4676 to prevent future errors occurring in remove_breakpoints. */
4678 if (!disabled_shlib_breaks
)
4680 target_terminal_ours_for_output ();
4681 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4684 disabled_shlib_breaks
= 1;
4691 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4692 enum bptype bp_kind
)
4694 struct symtab_and_line sal
;
4695 struct breakpoint
*b
;
4696 int thread
= -1; /* All threads. */
4703 b
= set_raw_breakpoint (sal
, bp_kind
);
4704 set_breakpoint_count (breakpoint_count
+ 1);
4705 b
->number
= breakpoint_count
;
4706 b
->cond_string
= (cond_string
== NULL
) ?
4707 NULL
: savestring (cond_string
, strlen (cond_string
));
4709 b
->addr_string
= NULL
;
4710 b
->enable_state
= bp_enabled
;
4711 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4712 b
->forked_inferior_pid
= 0;
4713 update_global_location_list ();
4720 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4722 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4726 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4728 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4732 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4734 struct symtab_and_line sal
;
4735 struct breakpoint
*b
;
4736 int thread
= -1; /* All threads. */
4743 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4744 set_breakpoint_count (breakpoint_count
+ 1);
4745 b
->number
= breakpoint_count
;
4746 b
->cond_string
= (cond_string
== NULL
) ?
4747 NULL
: savestring (cond_string
, strlen (cond_string
));
4749 b
->addr_string
= NULL
;
4750 b
->enable_state
= bp_enabled
;
4751 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4752 update_global_location_list ();
4758 hw_breakpoint_used_count (void)
4760 struct breakpoint
*b
;
4765 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4773 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4775 struct breakpoint
*b
;
4778 *other_type_used
= 0;
4781 if (breakpoint_enabled (b
))
4783 if (b
->type
== type
)
4785 else if ((b
->type
== bp_hardware_watchpoint
||
4786 b
->type
== bp_read_watchpoint
||
4787 b
->type
== bp_access_watchpoint
))
4788 *other_type_used
= 1;
4794 /* Call this after hitting the longjmp() breakpoint. Use this to set
4795 a new breakpoint at the target of the jmp_buf.
4797 FIXME - This ought to be done by setting a temporary breakpoint
4798 that gets deleted automatically... */
4801 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4803 struct breakpoint
*b
;
4806 if (b
->type
== bp_longjmp_resume
)
4808 b
->loc
->requested_address
= pc
;
4809 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4811 b
->enable_state
= bp_enabled
;
4812 b
->frame_id
= frame_id
;
4813 update_global_location_list ();
4819 disable_watchpoints_before_interactive_call_start (void)
4821 struct breakpoint
*b
;
4825 if (((b
->type
== bp_watchpoint
)
4826 || (b
->type
== bp_hardware_watchpoint
)
4827 || (b
->type
== bp_read_watchpoint
)
4828 || (b
->type
== bp_access_watchpoint
))
4829 && breakpoint_enabled (b
))
4831 b
->enable_state
= bp_call_disabled
;
4832 update_global_location_list ();
4838 enable_watchpoints_after_interactive_call_stop (void)
4840 struct breakpoint
*b
;
4844 if (((b
->type
== bp_watchpoint
)
4845 || (b
->type
== bp_hardware_watchpoint
)
4846 || (b
->type
== bp_read_watchpoint
)
4847 || (b
->type
== bp_access_watchpoint
))
4848 && (b
->enable_state
== bp_call_disabled
))
4850 b
->enable_state
= bp_enabled
;
4851 update_global_location_list ();
4857 /* Set a breakpoint that will evaporate an end of command
4858 at address specified by SAL.
4859 Restrict it to frame FRAME if FRAME is nonzero. */
4862 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4865 struct breakpoint
*b
;
4866 b
= set_raw_breakpoint (sal
, type
);
4867 b
->enable_state
= bp_enabled
;
4868 b
->disposition
= disp_donttouch
;
4869 b
->frame_id
= frame_id
;
4871 /* If we're debugging a multi-threaded program, then we
4872 want momentary breakpoints to be active in only a
4873 single thread of control. */
4874 if (in_thread_list (inferior_ptid
))
4875 b
->thread
= pid_to_thread_id (inferior_ptid
);
4877 update_global_location_list_nothrow ();
4883 /* Tell the user we have just set a breakpoint B. */
4886 mention (struct breakpoint
*b
)
4889 struct cleanup
*old_chain
, *ui_out_chain
;
4890 struct ui_stream
*stb
;
4892 stb
= ui_out_stream_new (uiout
);
4893 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4895 /* FIXME: This is misplaced; mention() is called by things (like
4896 hitting a watchpoint) other than breakpoint creation. It should
4897 be possible to clean this up and at the same time replace the
4898 random calls to breakpoint_changed with this hook, as has already
4899 been done for deprecated_delete_breakpoint_hook and so on. */
4900 if (deprecated_create_breakpoint_hook
)
4901 deprecated_create_breakpoint_hook (b
);
4902 breakpoint_create_event (b
->number
);
4904 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4905 b
->ops
->print_mention (b
);
4910 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4913 ui_out_text (uiout
, "Watchpoint ");
4914 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4915 ui_out_field_int (uiout
, "number", b
->number
);
4916 ui_out_text (uiout
, ": ");
4917 print_expression (b
->exp
, stb
->stream
);
4918 ui_out_field_stream (uiout
, "exp", stb
);
4919 do_cleanups (ui_out_chain
);
4921 case bp_hardware_watchpoint
:
4922 ui_out_text (uiout
, "Hardware watchpoint ");
4923 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4924 ui_out_field_int (uiout
, "number", b
->number
);
4925 ui_out_text (uiout
, ": ");
4926 print_expression (b
->exp
, stb
->stream
);
4927 ui_out_field_stream (uiout
, "exp", stb
);
4928 do_cleanups (ui_out_chain
);
4930 case bp_read_watchpoint
:
4931 ui_out_text (uiout
, "Hardware read watchpoint ");
4932 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4933 ui_out_field_int (uiout
, "number", b
->number
);
4934 ui_out_text (uiout
, ": ");
4935 print_expression (b
->exp
, stb
->stream
);
4936 ui_out_field_stream (uiout
, "exp", stb
);
4937 do_cleanups (ui_out_chain
);
4939 case bp_access_watchpoint
:
4940 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4941 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4942 ui_out_field_int (uiout
, "number", b
->number
);
4943 ui_out_text (uiout
, ": ");
4944 print_expression (b
->exp
, stb
->stream
);
4945 ui_out_field_stream (uiout
, "exp", stb
);
4946 do_cleanups (ui_out_chain
);
4949 if (ui_out_is_mi_like_p (uiout
))
4954 if (b
->disposition
== disp_del
)
4955 printf_filtered (_("Temporary breakpoint"));
4957 printf_filtered (_("Breakpoint"));
4958 printf_filtered (_(" %d"), b
->number
);
4961 case bp_hardware_breakpoint
:
4962 if (ui_out_is_mi_like_p (uiout
))
4967 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4971 case bp_catch_unload
:
4972 printf_filtered (_("Catchpoint %d (%s %s)"),
4974 (b
->type
== bp_catch_load
) ? "load" : "unload",
4975 (b
->dll_pathname
!= NULL
) ?
4976 b
->dll_pathname
: "<any library>");
4979 case bp_catch_vfork
:
4980 printf_filtered (_("Catchpoint %d (%s)"),
4982 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4985 printf_filtered (_("Catchpoint %d (exec)"),
4992 case bp_longjmp_resume
:
4993 case bp_step_resume
:
4995 case bp_watchpoint_scope
:
4996 case bp_shlib_event
:
4997 case bp_thread_event
:
4998 case bp_overlay_event
:
5004 /* i18n: cagney/2005-02-11: Below needs to be merged into a
5008 printf_filtered (_(" (%s) pending."), b
->addr_string
);
5012 if (addressprint
|| b
->source_file
== NULL
)
5014 printf_filtered (" at ");
5015 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5018 printf_filtered (": file %s, line %d.",
5019 b
->source_file
, b
->line_number
);
5023 struct bp_location
*loc
= b
->loc
;
5025 for (; loc
; loc
= loc
->next
)
5027 printf_filtered (" (%d locations)", n
);
5032 do_cleanups (old_chain
);
5033 if (ui_out_is_mi_like_p (uiout
))
5035 printf_filtered ("\n");
5039 static struct bp_location
*
5040 add_location_to_breakpoint (struct breakpoint
*b
, enum bptype bptype
,
5041 const struct symtab_and_line
*sal
)
5043 struct bp_location
*loc
, **tmp
;
5045 loc
= allocate_bp_location (b
, bptype
);
5046 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5049 loc
->requested_address
= sal
->pc
;
5050 loc
->address
= adjust_breakpoint_address (loc
->requested_address
,
5052 loc
->section
= sal
->section
;
5054 set_breakpoint_location_function (loc
);
5058 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5059 as textual description of the location, and COND_STRING
5060 as condition expression. */
5063 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5065 enum bptype type
, enum bpdisp disposition
,
5066 int thread
, int ignore_count
,
5067 struct breakpoint_ops
*ops
, int from_tty
)
5069 struct breakpoint
*b
= NULL
;
5072 if (type
== bp_hardware_breakpoint
)
5074 int i
= hw_breakpoint_used_count ();
5075 int target_resources_ok
=
5076 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5078 if (target_resources_ok
== 0)
5079 error (_("No hardware breakpoint support in the target."));
5080 else if (target_resources_ok
< 0)
5081 error (_("Hardware breakpoints used exceeds limit."));
5084 for (i
= 0; i
< sals
.nelts
; ++i
)
5086 struct symtab_and_line sal
= sals
.sals
[i
];
5087 struct bp_location
*loc
;
5090 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5094 b
= set_raw_breakpoint (sal
, type
);
5095 set_breakpoint_count (breakpoint_count
+ 1);
5096 b
->number
= breakpoint_count
;
5099 b
->cond_string
= cond_string
;
5100 b
->ignore_count
= ignore_count
;
5101 b
->enable_state
= bp_enabled
;
5102 b
->disposition
= disposition
;
5108 loc
= add_location_to_breakpoint (b
, type
, &sal
);
5113 char *arg
= b
->cond_string
;
5114 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5116 error (_("Garbage %s follows condition"), arg
);
5121 b
->addr_string
= addr_string
;
5123 /* addr_string has to be used or breakpoint_re_set will delete
5125 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5131 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5132 elements to fill the void space. */
5133 static void remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5135 int i
= index_to_remove
+1;
5136 int last_index
= sal
->nelts
-1;
5138 for (;i
<= last_index
; ++i
)
5139 sal
->sals
[i
-1] = sal
->sals
[i
];
5144 /* If appropriate, obtains all sals that correspond
5145 to the same file and line as SAL. This is done
5146 only if SAL does not have explicit PC and has
5147 line and file information. If we got just a single
5148 expanded sal, return the original.
5150 Otherwise, if SAL.explicit_line is not set, filter out
5151 all sals for which the name of enclosing function
5152 is different from SAL. This makes sure that if we have
5153 breakpoint originally set in template instantiation, say
5154 foo<int>(), we won't expand SAL to locations at the same
5155 line in all existing instantiations of 'foo'.
5158 struct symtabs_and_lines
5159 expand_line_sal_maybe (struct symtab_and_line sal
)
5161 struct symtabs_and_lines expanded
;
5162 CORE_ADDR original_pc
= sal
.pc
;
5163 char *original_function
= NULL
;
5167 /* If we have explicit pc, don't expand.
5168 If we have no line number, we can't expand. */
5169 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5172 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5173 expanded
.sals
[0] = sal
;
5178 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5180 expanded
= expand_line_sal (sal
);
5181 if (expanded
.nelts
== 1)
5183 /* We had one sal, we got one sal. Without futher
5184 processing, just return the original sal. */
5185 xfree (expanded
.sals
);
5187 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5188 sal
.pc
= original_pc
;
5189 expanded
.sals
[0] = sal
;
5193 if (!sal
.explicit_line
)
5195 CORE_ADDR func_addr
, func_end
;
5196 for (i
= 0; i
< expanded
.nelts
; ++i
)
5198 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5199 char *this_function
;
5200 if (find_pc_partial_function (pc
, &this_function
,
5201 &func_addr
, &func_end
))
5203 if (this_function
&&
5204 strcmp (this_function
, original_function
) != 0)
5206 remove_sal (&expanded
, i
);
5209 else if (func_addr
== pc
)
5211 /* We're at beginning of a function, and should
5213 struct symbol
*sym
= find_pc_function (pc
);
5215 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5218 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5225 if (expanded
.nelts
<= 1)
5227 /* This is un ugly workaround. If we get zero
5228 expanded sals then something is really wrong.
5229 Fix that by returnign the original sal. */
5230 xfree (expanded
.sals
);
5232 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5233 sal
.pc
= original_pc
;
5234 expanded
.sals
[0] = sal
;
5241 for (i
= 0; i
< expanded
.nelts
; ++i
)
5242 if (expanded
.sals
[i
].pc
== original_pc
)
5253 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5254 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5255 value. COND_STRING, if not NULL, specified the condition to be
5256 used for all breakpoints. Essentially the only case where
5257 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5258 function. In that case, it's still not possible to specify
5259 separate conditions for different overloaded functions, so
5260 we take just a single condition string.
5262 NOTE: If the function succeeds, the caller is expected to cleanup
5263 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5264 array contents). If the function fails (error() is called), the
5265 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5266 COND and SALS arrays and each of those arrays contents. */
5269 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5271 enum bptype type
, enum bpdisp disposition
,
5272 int thread
, int ignore_count
,
5273 struct breakpoint_ops
*ops
, int from_tty
)
5276 for (i
= 0; i
< sals
.nelts
; ++i
)
5278 struct symtabs_and_lines expanded
=
5279 expand_line_sal_maybe (sals
.sals
[i
]);
5281 create_breakpoint (expanded
, addr_string
[i
],
5282 cond_string
, type
, disposition
,
5283 thread
, ignore_count
, ops
, from_tty
);
5286 update_global_location_list ();
5289 /* Parse ARG which is assumed to be a SAL specification possibly
5290 followed by conditionals. On return, SALS contains an array of SAL
5291 addresses found. ADDR_STRING contains a vector of (canonical)
5292 address strings. ARG points to the end of the SAL. */
5295 parse_breakpoint_sals (char **address
,
5296 struct symtabs_and_lines
*sals
,
5297 char ***addr_string
,
5300 char *addr_start
= *address
;
5301 *addr_string
= NULL
;
5302 /* If no arg given, or if first arg is 'if ', use the default
5304 if ((*address
) == NULL
5305 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5307 if (default_breakpoint_valid
)
5309 struct symtab_and_line sal
;
5310 init_sal (&sal
); /* initialize to zeroes */
5311 sals
->sals
= (struct symtab_and_line
*)
5312 xmalloc (sizeof (struct symtab_and_line
));
5313 sal
.pc
= default_breakpoint_address
;
5314 sal
.line
= default_breakpoint_line
;
5315 sal
.symtab
= default_breakpoint_symtab
;
5316 sal
.section
= find_pc_overlay (sal
.pc
);
5317 sals
->sals
[0] = sal
;
5321 error (_("No default breakpoint address now."));
5325 /* Force almost all breakpoints to be in terms of the
5326 current_source_symtab (which is decode_line_1's default). This
5327 should produce the results we want almost all of the time while
5328 leaving default_breakpoint_* alone.
5329 ObjC: However, don't match an Objective-C method name which
5330 may have a '+' or '-' succeeded by a '[' */
5332 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5334 if (default_breakpoint_valid
5336 || ((strchr ("+-", (*address
)[0]) != NULL
)
5337 && ((*address
)[1] != '['))))
5338 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5339 default_breakpoint_line
, addr_string
,
5342 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5343 addr_string
, not_found_ptr
);
5345 /* For any SAL that didn't have a canonical string, fill one in. */
5346 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5347 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5348 if (addr_start
!= (*address
))
5351 for (i
= 0; i
< sals
->nelts
; i
++)
5353 /* Add the string if not present. */
5354 if ((*addr_string
)[i
] == NULL
)
5355 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5361 /* Convert each SAL into a real PC. Verify that the PC can be
5362 inserted as a breakpoint. If it can't throw an error. */
5365 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5369 for (i
= 0; i
< sals
->nelts
; i
++)
5370 resolve_sal_pc (&sals
->sals
[i
]);
5374 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5376 struct captured_parse_breakpoint_args
*args
= data
;
5378 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5379 args
->not_found_ptr
);
5382 /* Given TOK, a string specification of condition and thread, as
5383 accepted by the 'break' command, extract the condition
5384 string and thread number and set *COND_STRING and *THREAD.
5385 PC identifies the context at which the condition should be parsed.
5386 If no condition is found, *COND_STRING is set to NULL.
5387 If no thread is found, *THREAD is set to -1. */
5389 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5390 char **cond_string
, int *thread
)
5392 *cond_string
= NULL
;
5398 char *cond_start
= NULL
;
5399 char *cond_end
= NULL
;
5400 while (*tok
== ' ' || *tok
== '\t')
5405 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5408 toklen
= end_tok
- tok
;
5410 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5412 tok
= cond_start
= end_tok
+ 1;
5413 parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5415 *cond_string
= savestring (cond_start
,
5416 cond_end
- cond_start
);
5418 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5424 *thread
= strtol (tok
, &tok
, 0);
5426 error (_("Junk after thread keyword."));
5427 if (!valid_thread_id (*thread
))
5428 error (_("Unknown thread %d."), *thread
);
5431 error (_("Junk at end of arguments."));
5435 /* Set a breakpoint. This function is shared between
5436 CLI and MI functions for setting a breakpoint.
5437 This function has two major modes of operations,
5438 selected by the PARSE_CONDITION_AND_THREAD parameter.
5439 If non-zero, the function will parse arg, extracting
5440 breakpoint location, address and thread. Otherwise,
5441 ARG is just the location of breakpoint, with condition
5442 and thread specified by the COND_STRING and THREAD
5446 break_command_really (char *arg
, char *cond_string
, int thread
,
5447 int parse_condition_and_thread
,
5448 int tempflag
, int hardwareflag
,
5450 enum auto_boolean pending_break_support
,
5451 struct breakpoint_ops
*ops
,
5454 struct gdb_exception e
;
5455 struct symtabs_and_lines sals
;
5456 struct symtab_and_line pending_sal
;
5459 char *addr_start
= arg
;
5461 struct cleanup
*old_chain
;
5462 struct cleanup
*breakpoint_chain
= NULL
;
5463 struct captured_parse_breakpoint_args parse_args
;
5472 parse_args
.arg_p
= &arg
;
5473 parse_args
.sals_p
= &sals
;
5474 parse_args
.addr_string_p
= &addr_string
;
5475 parse_args
.not_found_ptr
= ¬_found
;
5477 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5478 &parse_args
, RETURN_MASK_ALL
);
5480 /* If caller is interested in rc value from parse, set value. */
5484 throw_exception (e
);
5488 case NOT_FOUND_ERROR
:
5490 /* If pending breakpoint support is turned off, throw
5493 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5494 throw_exception (e
);
5496 exception_print (gdb_stderr
, e
);
5498 /* If pending breakpoint support is auto query and the user
5499 selects no, then simply return the error code. */
5500 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5501 !nquery ("Make breakpoint pending on future shared library load? "))
5504 /* At this point, either the user was queried about setting
5505 a pending breakpoint and selected yes, or pending
5506 breakpoint behavior is on and thus a pending breakpoint
5507 is defaulted on behalf of the user. */
5508 copy_arg
= xstrdup (addr_start
);
5509 addr_string
= ©_arg
;
5511 sals
.sals
= &pending_sal
;
5516 throw_exception (e
);
5523 /* Create a chain of things that always need to be cleaned up. */
5524 old_chain
= make_cleanup (null_cleanup
, 0);
5528 /* Make sure that all storage allocated to SALS gets freed. */
5529 make_cleanup (xfree
, sals
.sals
);
5531 /* Cleanup the addr_string array but not its contents. */
5532 make_cleanup (xfree
, addr_string
);
5535 /* ----------------------------- SNIP -----------------------------
5536 Anything added to the cleanup chain beyond this point is assumed
5537 to be part of a breakpoint. If the breakpoint create succeeds
5538 then the memory is not reclaimed. */
5539 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5541 /* Mark the contents of the addr_string for cleanup. These go on
5542 the breakpoint_chain and only occure if the breakpoint create
5544 for (i
= 0; i
< sals
.nelts
; i
++)
5546 if (addr_string
[i
] != NULL
)
5547 make_cleanup (xfree
, addr_string
[i
]);
5550 /* Resolve all line numbers to PC's and verify that the addresses
5551 are ok for the target. */
5553 breakpoint_sals_to_pc (&sals
, addr_start
);
5555 /* Verify that condition can be parsed, before setting any
5556 breakpoints. Allocate a separate condition expression for each
5560 if (parse_condition_and_thread
)
5562 /* Here we only parse 'arg' to separate condition
5563 from thread number, so parsing in context of first
5564 sal is OK. When setting the breakpoint we'll
5565 re-parse it in context of each sal. */
5568 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5570 make_cleanup (xfree
, cond_string
);
5574 /* Create a private copy of condition string. */
5577 cond_string
= xstrdup (cond_string
);
5578 make_cleanup (xfree
, cond_string
);
5581 create_breakpoints (sals
, addr_string
, cond_string
,
5582 hardwareflag
? bp_hardware_breakpoint
5584 tempflag
? disp_del
: disp_donttouch
,
5585 thread
, ignore_count
, ops
, from_tty
);
5589 struct symtab_and_line sal
= {0};
5590 struct breakpoint
*b
;
5592 make_cleanup (xfree
, copy_arg
);
5594 b
= set_raw_breakpoint_without_location (hardwareflag
5595 ? bp_hardware_breakpoint
5597 set_breakpoint_count (breakpoint_count
+ 1);
5598 b
->number
= breakpoint_count
;
5600 b
->addr_string
= addr_string
[0];
5601 b
->cond_string
= NULL
;
5602 b
->ignore_count
= ignore_count
;
5603 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5604 b
->condition_not_parsed
= 1;
5607 update_global_location_list ();
5612 warning (_("Multiple breakpoints were set.\n"
5613 "Use the \"delete\" command to delete unwanted breakpoints."));
5614 /* That's it. Discard the cleanups for data inserted into the
5616 discard_cleanups (breakpoint_chain
);
5617 /* But cleanup everything else. */
5618 do_cleanups (old_chain
);
5621 /* Set a breakpoint.
5622 ARG is a string describing breakpoint address,
5623 condition, and thread.
5624 FLAG specifies if a breakpoint is hardware on,
5625 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5629 break_command_1 (char *arg
, int flag
, int from_tty
)
5631 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5632 int tempflag
= flag
& BP_TEMPFLAG
;
5634 break_command_really (arg
,
5635 NULL
, 0, 1 /* parse arg */,
5636 tempflag
, hardwareflag
,
5637 0 /* Ignore count */,
5638 pending_break_support
,
5639 NULL
/* breakpoint_ops */,
5645 set_breakpoint (char *address
, char *condition
,
5646 int hardwareflag
, int tempflag
,
5647 int thread
, int ignore_count
,
5650 break_command_really (address
, condition
, thread
,
5651 0 /* condition and thread are valid. */,
5652 tempflag
, hardwareflag
,
5655 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5659 /* Adjust SAL to the first instruction past the function prologue.
5660 The end of the prologue is determined using the line table from
5661 the debugging information.
5663 If SAL is already past the prologue, then do nothing. */
5666 skip_prologue_sal (struct symtab_and_line
*sal
)
5668 struct symbol
*sym
= find_pc_function (sal
->pc
);
5669 struct symtab_and_line start_sal
;
5674 start_sal
= find_function_start_sal (sym
, 1);
5675 if (sal
->pc
< start_sal
.pc
)
5679 /* Helper function for break_command_1 and disassemble_command. */
5682 resolve_sal_pc (struct symtab_and_line
*sal
)
5686 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5688 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5689 error (_("No line %d in file \"%s\"."),
5690 sal
->line
, sal
->symtab
->filename
);
5693 /* If this SAL corresponds to a breakpoint inserted using
5694 a line number, then skip the function prologue if necessary. */
5695 if (sal
->explicit_line
)
5696 skip_prologue_sal (sal
);
5699 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5701 struct blockvector
*bv
;
5705 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5708 sym
= block_function (b
);
5711 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5712 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5716 /* It really is worthwhile to have the section, so we'll just
5717 have to look harder. This case can be executed if we have
5718 line numbers but no functions (as can happen in assembly
5721 struct minimal_symbol
*msym
;
5723 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5725 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5732 break_command (char *arg
, int from_tty
)
5734 break_command_1 (arg
, 0, from_tty
);
5738 tbreak_command (char *arg
, int from_tty
)
5740 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5744 hbreak_command (char *arg
, int from_tty
)
5746 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5750 thbreak_command (char *arg
, int from_tty
)
5752 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5756 stop_command (char *arg
, int from_tty
)
5758 printf_filtered (_("Specify the type of breakpoint to set.\n\
5759 Usage: stop in <function | address>\n\
5760 stop at <line>\n"));
5764 stopin_command (char *arg
, int from_tty
)
5768 if (arg
== (char *) NULL
)
5770 else if (*arg
!= '*')
5775 /* look for a ':'. If this is a line number specification, then
5776 say it is bad, otherwise, it should be an address or
5777 function/method name */
5778 while (*argptr
&& !hasColon
)
5780 hasColon
= (*argptr
== ':');
5785 badInput
= (*argptr
!= ':'); /* Not a class::method */
5787 badInput
= isdigit (*arg
); /* a simple line number */
5791 printf_filtered (_("Usage: stop in <function | address>\n"));
5793 break_command_1 (arg
, 0, from_tty
);
5797 stopat_command (char *arg
, int from_tty
)
5801 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5808 /* look for a ':'. If there is a '::' then get out, otherwise
5809 it is probably a line number. */
5810 while (*argptr
&& !hasColon
)
5812 hasColon
= (*argptr
== ':');
5817 badInput
= (*argptr
== ':'); /* we have class::method */
5819 badInput
= !isdigit (*arg
); /* not a line number */
5823 printf_filtered (_("Usage: stop at <line>\n"));
5825 break_command_1 (arg
, 0, from_tty
);
5828 /* accessflag: hw_write: watch write,
5829 hw_read: watch read,
5830 hw_access: watch access (read or write) */
5832 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5834 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
5835 struct symtab_and_line sal
;
5836 struct expression
*exp
;
5837 struct block
*exp_valid_block
;
5838 struct value
*val
, *mark
;
5839 struct frame_info
*frame
;
5840 struct frame_info
*prev_frame
= NULL
;
5841 char *exp_start
= NULL
;
5842 char *exp_end
= NULL
;
5843 char *tok
, *id_tok_start
, *end_tok
;
5845 char *cond_start
= NULL
;
5846 char *cond_end
= NULL
;
5847 struct expression
*cond
= NULL
;
5848 int i
, other_type_used
, target_resources_ok
= 0;
5849 enum bptype bp_type
;
5853 init_sal (&sal
); /* initialize to zeroes */
5855 /* Make sure that we actually have parameters to parse. */
5856 if (arg
!= NULL
&& arg
[0] != '\0')
5858 toklen
= strlen (arg
); /* Size of argument list. */
5860 /* Points tok to the end of the argument list. */
5861 tok
= arg
+ toklen
- 1;
5863 /* Go backwards in the parameters list. Skip the last parameter.
5864 If we're expecting a 'thread <thread_num>' parameter, this should
5865 be the thread identifier. */
5866 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5868 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5871 /* Points end_tok to the beginning of the last token. */
5872 id_tok_start
= tok
+ 1;
5874 /* Go backwards in the parameters list. Skip one more parameter.
5875 If we're expecting a 'thread <thread_num>' parameter, we should
5876 reach a "thread" token. */
5877 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
5882 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
5885 /* Move the pointer forward to skip the whitespace and
5886 calculate the length of the token. */
5888 toklen
= end_tok
- tok
;
5890 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5892 /* At this point we've found a "thread" token, which means
5893 the user is trying to set a watchpoint that triggers
5894 only in a specific thread. */
5897 /* Extract the thread ID from the next token. */
5898 thread
= strtol (id_tok_start
, &endp
, 0);
5900 /* Check if the user provided a valid numeric value for the
5902 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
5903 error (_("Invalid thread ID specification %s."), id_tok_start
);
5905 /* Check if the thread actually exists. */
5906 if (!valid_thread_id (thread
))
5907 error (_("Unknown thread %d."), thread
);
5909 /* Truncate the string and get rid of the thread <thread_num>
5910 parameter before the parameter list is parsed by the
5911 evaluate_expression() function. */
5916 /* Parse the rest of the arguments. */
5917 innermost_block
= NULL
;
5919 exp
= parse_exp_1 (&arg
, 0, 0);
5921 exp_valid_block
= innermost_block
;
5922 mark
= value_mark ();
5923 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
5925 release_value (val
);
5928 while (*tok
== ' ' || *tok
== '\t')
5932 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5935 toklen
= end_tok
- tok
;
5936 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5938 tok
= cond_start
= end_tok
+ 1;
5939 cond
= parse_exp_1 (&tok
, 0, 0);
5943 error (_("Junk at end of command."));
5945 if (accessflag
== hw_read
)
5946 bp_type
= bp_read_watchpoint
;
5947 else if (accessflag
== hw_access
)
5948 bp_type
= bp_access_watchpoint
;
5950 bp_type
= bp_hardware_watchpoint
;
5952 mem_cnt
= can_use_hardware_watchpoint (val
);
5953 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5954 error (_("Expression cannot be implemented with read/access watchpoint."));
5957 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5958 target_resources_ok
=
5959 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5961 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5962 error (_("Target does not support this type of hardware watchpoint."));
5964 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5965 error (_("Target can only support one kind of HW watchpoint at a time."));
5968 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5969 watchpoint could not be set. */
5970 if (!mem_cnt
|| target_resources_ok
<= 0)
5971 bp_type
= bp_watchpoint
;
5973 frame
= block_innermost_frame (exp_valid_block
);
5975 prev_frame
= get_prev_frame (frame
);
5979 /* If the expression is "local", then set up a "watchpoint scope"
5980 breakpoint at the point where we've left the scope of the watchpoint
5981 expression. Create the scope breakpoint before the watchpoint, so
5982 that we will encounter it first in bpstat_stop_status. */
5983 if (innermost_block
&& prev_frame
)
5985 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5986 bp_watchpoint_scope
);
5988 scope_breakpoint
->enable_state
= bp_enabled
;
5990 /* Automatically delete the breakpoint when it hits. */
5991 scope_breakpoint
->disposition
= disp_del
;
5993 /* Only break in the proper frame (help with recursion). */
5994 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5996 /* Set the address at which we will stop. */
5997 scope_breakpoint
->loc
->requested_address
5998 = get_frame_pc (prev_frame
);
5999 scope_breakpoint
->loc
->address
6000 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
6001 scope_breakpoint
->type
);
6004 /* Now set up the breakpoint. */
6005 b
= set_raw_breakpoint (sal
, bp_type
);
6006 set_breakpoint_count (breakpoint_count
+ 1);
6007 b
->number
= breakpoint_count
;
6009 b
->disposition
= disp_donttouch
;
6011 b
->exp_valid_block
= exp_valid_block
;
6012 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6015 b
->loc
->cond
= cond
;
6017 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6022 b
->watchpoint_frame
= get_frame_id (frame
);
6024 b
->watchpoint_frame
= null_frame_id
;
6026 if (scope_breakpoint
!= NULL
)
6028 /* The scope breakpoint is related to the watchpoint. We will
6029 need to act on them together. */
6030 b
->related_breakpoint
= scope_breakpoint
;
6031 scope_breakpoint
->related_breakpoint
= b
;
6034 value_free_to_mark (mark
);
6036 update_global_location_list ();
6039 /* Return count of locations need to be watched and can be handled
6040 in hardware. If the watchpoint can not be handled
6041 in hardware return zero. */
6044 can_use_hardware_watchpoint (struct value
*v
)
6046 int found_memory_cnt
= 0;
6047 struct value
*head
= v
;
6049 /* Did the user specifically forbid us to use hardware watchpoints? */
6050 if (!can_use_hw_watchpoints
)
6053 /* Make sure that the value of the expression depends only upon
6054 memory contents, and values computed from them within GDB. If we
6055 find any register references or function calls, we can't use a
6056 hardware watchpoint.
6058 The idea here is that evaluating an expression generates a series
6059 of values, one holding the value of every subexpression. (The
6060 expression a*b+c has five subexpressions: a, b, a*b, c, and
6061 a*b+c.) GDB's values hold almost enough information to establish
6062 the criteria given above --- they identify memory lvalues,
6063 register lvalues, computed values, etcetera. So we can evaluate
6064 the expression, and then scan the chain of values that leaves
6065 behind to decide whether we can detect any possible change to the
6066 expression's final value using only hardware watchpoints.
6068 However, I don't think that the values returned by inferior
6069 function calls are special in any way. So this function may not
6070 notice that an expression involving an inferior function call
6071 can't be watched with hardware watchpoints. FIXME. */
6072 for (; v
; v
= value_next (v
))
6074 if (VALUE_LVAL (v
) == lval_memory
)
6077 /* A lazy memory lvalue is one that GDB never needed to fetch;
6078 we either just used its address (e.g., `a' in `a.b') or
6079 we never needed it at all (e.g., `a' in `a,b'). */
6083 /* Ahh, memory we actually used! Check if we can cover
6084 it with hardware watchpoints. */
6085 struct type
*vtype
= check_typedef (value_type (v
));
6087 /* We only watch structs and arrays if user asked for it
6088 explicitly, never if they just happen to appear in a
6089 middle of some value chain. */
6091 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6092 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6094 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
6095 int len
= TYPE_LENGTH (value_type (v
));
6097 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6104 else if (VALUE_LVAL (v
) != not_lval
6105 && deprecated_value_modifiable (v
) == 0)
6106 return 0; /* ??? What does this represent? */
6107 else if (VALUE_LVAL (v
) == lval_register
)
6108 return 0; /* cannot watch a register with a HW watchpoint */
6111 /* The expression itself looks suitable for using a hardware
6112 watchpoint, but give the target machine a chance to reject it. */
6113 return found_memory_cnt
;
6117 watch_command_wrapper (char *arg
, int from_tty
)
6119 watch_command (arg
, from_tty
);
6123 watch_command (char *arg
, int from_tty
)
6125 watch_command_1 (arg
, hw_write
, from_tty
);
6129 rwatch_command_wrapper (char *arg
, int from_tty
)
6131 rwatch_command (arg
, from_tty
);
6135 rwatch_command (char *arg
, int from_tty
)
6137 watch_command_1 (arg
, hw_read
, from_tty
);
6141 awatch_command_wrapper (char *arg
, int from_tty
)
6143 awatch_command (arg
, from_tty
);
6147 awatch_command (char *arg
, int from_tty
)
6149 watch_command_1 (arg
, hw_access
, from_tty
);
6153 /* Helper routines for the until_command routine in infcmd.c. Here
6154 because it uses the mechanisms of breakpoints. */
6156 /* This function is called by fetch_inferior_event via the
6157 cmd_continuation pointer, to complete the until command. It takes
6158 care of cleaning up the temporary breakpoints set up by the until
6161 until_break_command_continuation (struct continuation_arg
*arg
, int error
)
6163 delete_breakpoint ((struct breakpoint
*)(arg
->data
.pointer
));
6165 delete_breakpoint ((struct breakpoint
*)(arg
->next
->data
.pointer
));
6169 until_break_command (char *arg
, int from_tty
, int anywhere
)
6171 struct symtabs_and_lines sals
;
6172 struct symtab_and_line sal
;
6173 struct frame_info
*frame
= get_selected_frame (NULL
);
6174 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6175 struct breakpoint
*breakpoint
;
6176 struct breakpoint
*breakpoint2
= NULL
;
6177 struct cleanup
*old_chain
;
6178 struct continuation_arg
*arg1
;
6179 struct continuation_arg
*arg2
;
6182 clear_proceed_status ();
6184 /* Set a breakpoint where the user wants it and at return from
6187 if (default_breakpoint_valid
)
6188 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6189 default_breakpoint_line
, (char ***) NULL
, NULL
);
6191 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6192 0, (char ***) NULL
, NULL
);
6194 if (sals
.nelts
!= 1)
6195 error (_("Couldn't get information on specified line."));
6198 xfree (sals
.sals
); /* malloc'd, so freed */
6201 error (_("Junk at end of arguments."));
6203 resolve_sal_pc (&sal
);
6206 /* If the user told us to continue until a specified location,
6207 we don't specify a frame at which we need to stop. */
6208 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6210 /* Otherwise, specify the current frame, because we want to stop only
6211 at the very same frame. */
6212 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6215 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6217 /* Keep within the current frame, or in frames called by the current
6221 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6222 sal
.pc
= get_frame_pc (prev_frame
);
6223 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6225 make_cleanup_delete_breakpoint (breakpoint2
);
6228 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6230 /* If we are running asynchronously, and proceed call above has actually
6231 managed to start the target, arrange for breakpoints to be
6232 deleted when the target stops. Otherwise, we're already stopped and
6233 delete breakpoints via cleanup chain. */
6235 if (target_can_async_p () && target_executing
)
6238 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
6240 arg1
->data
.pointer
= breakpoint
;
6244 arg2
= (struct continuation_arg
*)
6245 xmalloc ( sizeof (struct continuation_arg
));
6247 arg2
->data
.pointer
= breakpoint2
;
6251 discard_cleanups (old_chain
);
6252 add_continuation (until_break_command_continuation
, arg1
);
6255 do_cleanups (old_chain
);
6259 ep_skip_leading_whitespace (char **s
)
6261 if ((s
== NULL
) || (*s
== NULL
))
6263 while (isspace (**s
))
6267 /* This function examines a string, and attempts to find a token
6268 that might be an event name in the leading characters. If a
6269 possible match is found, a pointer to the last character of
6270 the token is returned. Else, NULL is returned. */
6273 ep_find_event_name_end (char *arg
)
6276 char *event_name_end
= NULL
;
6278 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6282 /* We break out of the loop when we find a token delimiter.
6283 Basically, we're looking for alphanumerics and underscores;
6284 anything else delimites the token. */
6287 if (!isalnum (*s
) && (*s
!= '_'))
6293 return event_name_end
;
6297 /* This function attempts to parse an optional "if <cond>" clause
6298 from the arg string. If one is not found, it returns NULL.
6300 Else, it returns a pointer to the condition string. (It does not
6301 attempt to evaluate the string against a particular block.) And,
6302 it updates arg to point to the first character following the parsed
6303 if clause in the arg string. */
6306 ep_parse_optional_if_clause (char **arg
)
6310 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6313 /* Skip the "if" keyword. */
6316 /* Skip any extra leading whitespace, and record the start of the
6317 condition string. */
6318 ep_skip_leading_whitespace (arg
);
6321 /* Assume that the condition occupies the remainder of the arg string. */
6322 (*arg
) += strlen (cond_string
);
6327 /* This function attempts to parse an optional filename from the arg
6328 string. If one is not found, it returns NULL.
6330 Else, it returns a pointer to the parsed filename. (This function
6331 makes no attempt to verify that a file of that name exists, or is
6332 accessible.) And, it updates arg to point to the first character
6333 following the parsed filename in the arg string.
6335 Note that clients needing to preserve the returned filename for
6336 future access should copy it to their own buffers. */
6338 ep_parse_optional_filename (char **arg
)
6340 static char filename
[1024];
6345 if ((*arg_p
== '\0') || isspace (*arg_p
))
6363 /* Commands to deal with catching events, such as signals, exceptions,
6364 process start/exit, etc. */
6368 catch_fork
, catch_vfork
6373 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6376 char *cond_string
= NULL
;
6378 ep_skip_leading_whitespace (&arg
);
6380 /* The allowed syntax is:
6382 catch [v]fork if <cond>
6384 First, check if there's an if clause. */
6385 cond_string
= ep_parse_optional_if_clause (&arg
);
6387 if ((*arg
!= '\0') && !isspace (*arg
))
6388 error (_("Junk at end of arguments."));
6390 /* If this target supports it, create a fork or vfork catchpoint
6391 and enable reporting of such events. */
6395 create_fork_event_catchpoint (tempflag
, cond_string
);
6398 create_vfork_event_catchpoint (tempflag
, cond_string
);
6401 error (_("unsupported or unknown fork kind; cannot catch it"));
6407 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6409 char *cond_string
= NULL
;
6411 ep_skip_leading_whitespace (&arg
);
6413 /* The allowed syntax is:
6415 catch exec if <cond>
6417 First, check if there's an if clause. */
6418 cond_string
= ep_parse_optional_if_clause (&arg
);
6420 if ((*arg
!= '\0') && !isspace (*arg
))
6421 error (_("Junk at end of arguments."));
6423 /* If this target supports it, create an exec catchpoint
6424 and enable reporting of such events. */
6425 create_exec_event_catchpoint (tempflag
, cond_string
);
6429 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6431 char *dll_pathname
= NULL
;
6432 char *cond_string
= NULL
;
6434 ep_skip_leading_whitespace (&arg
);
6436 /* The allowed syntax is:
6438 catch load if <cond>
6439 catch load <filename>
6440 catch load <filename> if <cond>
6442 The user is not allowed to specify the <filename> after an
6445 We'll ignore the pathological case of a file named "if".
6447 First, check if there's an if clause. If so, then there
6448 cannot be a filename. */
6449 cond_string
= ep_parse_optional_if_clause (&arg
);
6451 /* If there was an if clause, then there cannot be a filename.
6452 Else, there might be a filename and an if clause. */
6453 if (cond_string
== NULL
)
6455 dll_pathname
= ep_parse_optional_filename (&arg
);
6456 ep_skip_leading_whitespace (&arg
);
6457 cond_string
= ep_parse_optional_if_clause (&arg
);
6460 if ((*arg
!= '\0') && !isspace (*arg
))
6461 error (_("Junk at end of arguments."));
6463 /* Create a load breakpoint that only triggers when a load of
6464 the specified dll (or any dll, if no pathname was specified)
6466 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6467 dll_pathname
, cond_string
);
6471 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6473 char *dll_pathname
= NULL
;
6474 char *cond_string
= NULL
;
6476 ep_skip_leading_whitespace (&arg
);
6478 /* The allowed syntax is:
6480 catch unload if <cond>
6481 catch unload <filename>
6482 catch unload <filename> if <cond>
6484 The user is not allowed to specify the <filename> after an
6487 We'll ignore the pathological case of a file named "if".
6489 First, check if there's an if clause. If so, then there
6490 cannot be a filename. */
6491 cond_string
= ep_parse_optional_if_clause (&arg
);
6493 /* If there was an if clause, then there cannot be a filename.
6494 Else, there might be a filename and an if clause. */
6495 if (cond_string
== NULL
)
6497 dll_pathname
= ep_parse_optional_filename (&arg
);
6498 ep_skip_leading_whitespace (&arg
);
6499 cond_string
= ep_parse_optional_if_clause (&arg
);
6502 if ((*arg
!= '\0') && !isspace (*arg
))
6503 error (_("Junk at end of arguments."));
6505 /* Create an unload breakpoint that only triggers when an unload of
6506 the specified dll (or any dll, if no pathname was specified)
6508 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6509 dll_pathname
, cond_string
);
6512 static enum print_stop_action
6513 print_exception_catchpoint (struct breakpoint
*b
)
6515 annotate_catchpoint (b
->number
);
6517 if (strstr (b
->addr_string
, "throw") != NULL
)
6518 printf_filtered (_("\nCatchpoint %d (exception thrown)\n"),
6521 printf_filtered (_("\nCatchpoint %d (exception caught)\n"),
6524 return PRINT_SRC_AND_LOC
;
6528 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6533 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6534 ui_out_field_string (uiout
, "addr", "<PENDING>");
6536 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6540 *last_addr
= b
->loc
->address
;
6541 if (strstr (b
->addr_string
, "throw") != NULL
)
6542 ui_out_field_string (uiout
, "what", "exception throw");
6544 ui_out_field_string (uiout
, "what", "exception catch");
6548 print_mention_exception_catchpoint (struct breakpoint
*b
)
6550 if (strstr (b
->addr_string
, "throw") != NULL
)
6551 printf_filtered (_("Catchpoint %d (throw)"), b
->number
);
6553 printf_filtered (_("Catchpoint %d (catch)"), b
->number
);
6556 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6557 print_exception_catchpoint
,
6558 print_one_exception_catchpoint
,
6559 print_mention_exception_catchpoint
6563 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6564 enum exception_event_kind ex_event
, int from_tty
)
6566 char *trigger_func_name
;
6568 if (ex_event
== EX_EVENT_CATCH
)
6569 trigger_func_name
= "__cxa_begin_catch";
6571 trigger_func_name
= "__cxa_throw";
6573 break_command_really (trigger_func_name
, cond_string
, -1,
6574 0 /* condition and thread are valid. */,
6577 AUTO_BOOLEAN_TRUE
/* pending */,
6578 &gnu_v3_exception_catchpoint_ops
, from_tty
);
6583 /* Deal with "catch catch" and "catch throw" commands */
6586 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6587 int tempflag
, int from_tty
)
6589 char *cond_string
= NULL
;
6590 struct symtab_and_line
*sal
= NULL
;
6592 ep_skip_leading_whitespace (&arg
);
6594 cond_string
= ep_parse_optional_if_clause (&arg
);
6596 if ((*arg
!= '\0') && !isspace (*arg
))
6597 error (_("Junk at end of arguments."));
6599 if ((ex_event
!= EX_EVENT_THROW
) &&
6600 (ex_event
!= EX_EVENT_CATCH
))
6601 error (_("Unsupported or unknown exception event; cannot catch it"));
6603 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6606 warning (_("Unsupported with this platform/compiler combination."));
6609 /* Create a breakpoint struct for Ada exception catchpoints. */
6612 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6616 struct expression
*cond
,
6617 struct breakpoint_ops
*ops
,
6621 struct breakpoint
*b
;
6625 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6626 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6627 version for exception catchpoints, because two catchpoints
6628 used for different exception names will use the same address.
6629 In this case, a "breakpoint ... also set at..." warning is
6630 unproductive. Besides. the warning phrasing is also a bit
6631 inapropriate, we should use the word catchpoint, and tell
6632 the user what type of catchpoint it is. The above is good
6633 enough for now, though. */
6636 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6637 set_breakpoint_count (breakpoint_count
+ 1);
6639 b
->enable_state
= bp_enabled
;
6640 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6641 b
->number
= breakpoint_count
;
6642 b
->ignore_count
= 0;
6643 b
->loc
->cond
= cond
;
6644 b
->addr_string
= addr_string
;
6645 b
->language
= language_ada
;
6646 b
->cond_string
= cond_string
;
6647 b
->exp_string
= exp_string
;
6652 update_global_location_list ();
6655 /* Implement the "catch exception" command. */
6658 catch_ada_exception_command (char *arg
, int tempflag
, int from_tty
)
6660 struct symtab_and_line sal
;
6662 char *addr_string
= NULL
;
6663 char *exp_string
= NULL
;
6664 char *cond_string
= NULL
;
6665 struct expression
*cond
= NULL
;
6666 struct breakpoint_ops
*ops
= NULL
;
6668 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6669 &cond_string
, &cond
, &ops
);
6670 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6671 cond_string
, cond
, ops
, tempflag
,
6675 /* Implement the "catch assert" command. */
6678 catch_assert_command (char *arg
, int tempflag
, int from_tty
)
6680 struct symtab_and_line sal
;
6681 char *addr_string
= NULL
;
6682 struct breakpoint_ops
*ops
= NULL
;
6684 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6685 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6686 tempflag
, from_tty
);
6690 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6693 /* The first argument may be an event name, such as "start" or "load".
6694 If so, then handle it as such. If it doesn't match an event name,
6695 then attempt to interpret it as an exception name. (This latter is
6696 the v4.16-and-earlier GDB meaning of the "catch" command.)
6698 First, try to find the bounds of what might be an event name. */
6699 char *arg1_start
= arg
;
6703 if (arg1_start
== NULL
)
6705 /* Old behaviour was to use pre-v-4.16 syntax */
6706 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6708 /* Now, this is not allowed */
6709 error (_("Catch requires an event name."));
6712 arg1_end
= ep_find_event_name_end (arg1_start
);
6713 if (arg1_end
== NULL
)
6714 error (_("catch requires an event"));
6715 arg1_length
= arg1_end
+ 1 - arg1_start
;
6717 /* Try to match what we found against known event names. */
6718 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6720 error (_("Catch of signal not yet implemented"));
6722 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6724 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6725 tempflag
, from_tty
);
6727 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6729 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6730 tempflag
, from_tty
);
6732 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6734 error (_("Catch of thread_start not yet implemented"));
6736 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6738 error (_("Catch of thread_exit not yet implemented"));
6740 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6742 error (_("Catch of thread_join not yet implemented"));
6744 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6746 error (_("Catch of start not yet implemented"));
6748 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6750 error (_("Catch of exit not yet implemented"));
6752 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6754 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6756 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6758 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6760 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6762 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6764 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6766 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6768 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6770 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6772 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6774 error (_("Catch of stop not yet implemented"));
6776 else if (strncmp (arg1_start
, "exception", arg1_length
) == 0)
6778 catch_ada_exception_command (arg1_end
+ 1, tempflag
, from_tty
);
6781 else if (strncmp (arg1_start
, "assert", arg1_length
) == 0)
6783 catch_assert_command (arg1_end
+ 1, tempflag
, from_tty
);
6786 /* This doesn't appear to be an event name */
6790 /* Pre-v.4.16 behaviour was to treat the argument
6791 as the name of an exception */
6792 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6793 /* Now this is not allowed */
6794 error (_("Unknown event kind specified for catch"));
6800 catch_command (char *arg
, int from_tty
)
6802 catch_command_1 (arg
, 0, from_tty
);
6807 tcatch_command (char *arg
, int from_tty
)
6809 catch_command_1 (arg
, 1, from_tty
);
6812 /* Delete breakpoints by address or line. */
6815 clear_command (char *arg
, int from_tty
)
6817 struct breakpoint
*b
;
6818 VEC(breakpoint_p
) *found
= 0;
6821 struct symtabs_and_lines sals
;
6822 struct symtab_and_line sal
;
6827 sals
= decode_line_spec (arg
, 1);
6832 sals
.sals
= (struct symtab_and_line
*)
6833 xmalloc (sizeof (struct symtab_and_line
));
6834 make_cleanup (xfree
, sals
.sals
);
6835 init_sal (&sal
); /* initialize to zeroes */
6836 sal
.line
= default_breakpoint_line
;
6837 sal
.symtab
= default_breakpoint_symtab
;
6838 sal
.pc
= default_breakpoint_address
;
6839 if (sal
.symtab
== 0)
6840 error (_("No source file specified."));
6848 /* We don't call resolve_sal_pc here. That's not
6849 as bad as it seems, because all existing breakpoints
6850 typically have both file/line and pc set. So, if
6851 clear is given file/line, we can match this to existing
6852 breakpoint without obtaining pc at all.
6854 We only support clearing given the address explicitly
6855 present in breakpoint table. Say, we've set breakpoint
6856 at file:line. There were several PC values for that file:line,
6857 due to optimization, all in one block.
6858 We've picked one PC value. If "clear" is issued with another
6859 PC corresponding to the same file:line, the breakpoint won't
6860 be cleared. We probably can still clear the breakpoint, but
6861 since the other PC value is never presented to user, user
6862 can only find it by guessing, and it does not seem important
6865 /* For each line spec given, delete bps which correspond
6866 to it. Do it in two passes, solely to preserve the current
6867 behavior that from_tty is forced true if we delete more than
6871 for (i
= 0; i
< sals
.nelts
; i
++)
6873 /* If exact pc given, clear bpts at that pc.
6874 If line given (pc == 0), clear all bpts on specified line.
6875 If defaulting, clear all bpts on default line
6878 defaulting sal.pc != 0 tests to do
6883 1 0 <can't happen> */
6887 /* Find all matching breakpoints and add them to
6892 /* Are we going to delete b? */
6893 if (b
->type
!= bp_none
6894 && b
->type
!= bp_watchpoint
6895 && b
->type
!= bp_hardware_watchpoint
6896 && b
->type
!= bp_read_watchpoint
6897 && b
->type
!= bp_access_watchpoint
)
6899 struct bp_location
*loc
= b
->loc
;
6900 for (; loc
; loc
= loc
->next
)
6902 int pc_match
= sal
.pc
6903 && (loc
->address
== sal
.pc
)
6904 && (!section_is_overlay (loc
->section
)
6905 || loc
->section
== sal
.section
);
6906 int line_match
= ((default_match
|| (0 == sal
.pc
))
6907 && b
->source_file
!= NULL
6908 && sal
.symtab
!= NULL
6909 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6910 && b
->line_number
== sal
.line
);
6911 if (pc_match
|| line_match
)
6920 VEC_safe_push(breakpoint_p
, found
, b
);
6923 /* Now go thru the 'found' chain and delete them. */
6924 if (VEC_empty(breakpoint_p
, found
))
6927 error (_("No breakpoint at %s."), arg
);
6929 error (_("No breakpoint at this line."));
6932 if (VEC_length(breakpoint_p
, found
) > 1)
6933 from_tty
= 1; /* Always report if deleted more than one */
6936 if (VEC_length(breakpoint_p
, found
) == 1)
6937 printf_unfiltered (_("Deleted breakpoint "));
6939 printf_unfiltered (_("Deleted breakpoints "));
6941 breakpoints_changed ();
6943 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6946 printf_unfiltered ("%d ", b
->number
);
6947 delete_breakpoint (b
);
6950 putchar_unfiltered ('\n');
6953 /* Delete breakpoint in BS if they are `delete' breakpoints and
6954 all breakpoints that are marked for deletion, whether hit or not.
6955 This is called after any breakpoint is hit, or after errors. */
6958 breakpoint_auto_delete (bpstat bs
)
6960 struct breakpoint
*b
, *temp
;
6962 for (; bs
; bs
= bs
->next
)
6963 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
->disposition
== disp_del
6965 delete_breakpoint (bs
->breakpoint_at
->owner
);
6967 ALL_BREAKPOINTS_SAFE (b
, temp
)
6969 if (b
->disposition
== disp_del_at_next_stop
)
6970 delete_breakpoint (b
);
6975 update_global_location_list (void)
6977 struct breakpoint
*b
;
6978 struct bp_location
**next
= &bp_location_chain
;
6979 struct bp_location
*loc
;
6980 struct bp_location
*loc2
;
6981 struct gdb_exception e
;
6982 VEC(bp_location_p
) *old_locations
= NULL
;
6986 /* Store old locations for future reference. */
6987 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
6988 VEC_safe_push (bp_location_p
, old_locations
, loc
);
6990 bp_location_chain
= NULL
;
6993 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
6996 next
= &(loc
->global_next
);
7001 /* Identify bp_location instances that are no longer present in the new
7002 list, and therefore should be freed. Note that it's not necessary that
7003 those locations should be removed from inferior -- if there's another
7004 location at the same address (previously marked as duplicate),
7005 we don't need to remove/insert the location. */
7006 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
7008 /* Tells if 'loc' is found amoung the new locations. If not, we
7010 int found_object
= 0;
7011 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7018 /* If this location is no longer present, and inserted, look if there's
7019 maybe a new location at the same address. If so, mark that one
7020 inserted, and don't remove this one. This is needed so that we
7021 don't have a time window where a breakpoint at certain location is not
7026 /* If the location is inserted now, we might have to remove it. */
7029 if (found_object
&& should_be_inserted (loc
))
7031 /* The location is still present in the location list, and still
7032 should be inserted. Don't do anything. */
7037 /* The location is either no longer present, or got disabled.
7038 See if there's another location at the same address, in which
7039 case we don't need to remove this one from the target. */
7040 if (breakpoint_address_is_meaningful (loc
->owner
))
7041 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7043 /* For the sake of should_insert_location. The
7044 call to check_duplicates will fix up this later. */
7045 loc2
->duplicate
= 0;
7046 if (should_be_inserted (loc2
)
7047 && loc2
!= loc
&& loc2
->address
== loc
->address
)
7050 loc2
->target_info
= loc
->target_info
;
7058 if (remove_breakpoint (loc
, mark_uninserted
))
7060 /* This is just about all we can do. We could keep this
7061 location on the global list, and try to remove it next
7062 time, but there's no particular reason why we will
7065 Note that at this point, loc->owner is still valid,
7066 as delete_breakpoint frees the breakpoint only
7067 after calling us. */
7068 printf_filtered (_("warning: Error removing breakpoint %d\n"),
7069 loc
->owner
->number
);
7074 free_bp_location (loc
);
7079 check_duplicates (b
);
7082 if (always_inserted_mode
&& target_has_execution
)
7083 insert_breakpoint_locations ();
7087 update_global_location_list_nothrow (void)
7089 struct gdb_exception e
;
7090 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7091 update_global_location_list ();
7094 /* Delete a breakpoint and clean up all traces of it in the data
7098 delete_breakpoint (struct breakpoint
*bpt
)
7100 struct breakpoint
*b
;
7102 struct bp_location
*loc
, *next
;
7104 gdb_assert (bpt
!= NULL
);
7106 /* Has this bp already been deleted? This can happen because multiple
7107 lists can hold pointers to bp's. bpstat lists are especial culprits.
7109 One example of this happening is a watchpoint's scope bp. When the
7110 scope bp triggers, we notice that the watchpoint is out of scope, and
7111 delete it. We also delete its scope bp. But the scope bp is marked
7112 "auto-deleting", and is already on a bpstat. That bpstat is then
7113 checked for auto-deleting bp's, which are deleted.
7115 A real solution to this problem might involve reference counts in bp's,
7116 and/or giving them pointers back to their referencing bpstat's, and
7117 teaching delete_breakpoint to only free a bp's storage when no more
7118 references were extent. A cheaper bandaid was chosen. */
7119 if (bpt
->type
== bp_none
)
7122 if (deprecated_delete_breakpoint_hook
)
7123 deprecated_delete_breakpoint_hook (bpt
);
7124 breakpoint_delete_event (bpt
->number
);
7126 if (breakpoint_chain
== bpt
)
7127 breakpoint_chain
= bpt
->next
;
7132 b
->next
= bpt
->next
;
7136 free_command_lines (&bpt
->commands
);
7137 if (bpt
->cond_string
!= NULL
)
7138 xfree (bpt
->cond_string
);
7139 if (bpt
->addr_string
!= NULL
)
7140 xfree (bpt
->addr_string
);
7141 if (bpt
->exp
!= NULL
)
7143 if (bpt
->exp_string
!= NULL
)
7144 xfree (bpt
->exp_string
);
7145 if (bpt
->val
!= NULL
)
7146 value_free (bpt
->val
);
7147 if (bpt
->source_file
!= NULL
)
7148 xfree (bpt
->source_file
);
7149 if (bpt
->dll_pathname
!= NULL
)
7150 xfree (bpt
->dll_pathname
);
7151 if (bpt
->triggered_dll_pathname
!= NULL
)
7152 xfree (bpt
->triggered_dll_pathname
);
7153 if (bpt
->exec_pathname
!= NULL
)
7154 xfree (bpt
->exec_pathname
);
7156 /* Be sure no bpstat's are pointing at it after it's been freed. */
7157 /* FIXME, how can we find all bpstat's?
7158 We just check stop_bpstat for now. Note that we cannot just
7159 remove bpstats pointing at bpt from the stop_bpstat list
7160 entirely, as breakpoint commands are associated with the bpstat;
7161 if we remove it here, then the later call to
7162 bpstat_do_actions (&stop_bpstat);
7163 in event-top.c won't do anything, and temporary breakpoints
7164 with commands won't work. */
7165 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
7166 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7168 bs
->breakpoint_at
= NULL
;
7170 /* bs->commands will be freed later. */
7173 /* Now that breakpoint is removed from breakpoint
7174 list, update the global location list. This
7175 will remove locations that used to belong to
7176 this breakpoint. Do this before freeing
7177 the breakpoint itself, since remove_breakpoint
7178 looks at location's owner. It might be better
7179 design to have location completely self-contained,
7180 but it's not the case now. */
7181 update_global_location_list ();
7184 /* On the chance that someone will soon try again to delete this same
7185 bp, we mark it as deleted before freeing its storage. */
7186 bpt
->type
= bp_none
;
7192 do_delete_breakpoint_cleanup (void *b
)
7194 delete_breakpoint (b
);
7198 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7200 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7204 delete_command (char *arg
, int from_tty
)
7206 struct breakpoint
*b
, *temp
;
7212 int breaks_to_delete
= 0;
7214 /* Delete all breakpoints if no argument.
7215 Do not delete internal or call-dummy breakpoints, these
7216 have to be deleted with an explicit breakpoint number argument. */
7219 if (b
->type
!= bp_call_dummy
&&
7220 b
->type
!= bp_shlib_event
&&
7221 b
->type
!= bp_thread_event
&&
7222 b
->type
!= bp_overlay_event
&&
7225 breaks_to_delete
= 1;
7230 /* Ask user only if there are some breakpoints to delete. */
7232 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7234 ALL_BREAKPOINTS_SAFE (b
, temp
)
7236 if (b
->type
!= bp_call_dummy
&&
7237 b
->type
!= bp_shlib_event
&&
7238 b
->type
!= bp_thread_event
&&
7239 b
->type
!= bp_overlay_event
&&
7241 delete_breakpoint (b
);
7246 map_breakpoint_numbers (arg
, delete_breakpoint
);
7250 all_locations_are_pending (struct bp_location
*loc
)
7252 for (; loc
; loc
= loc
->next
)
7253 if (!loc
->shlib_disabled
)
7258 /* Subroutine of update_breakpoint_locations to simplify it.
7259 Return non-zero if multiple fns in list LOC have the same name.
7260 Null names are ignored. */
7263 ambiguous_names_p (struct bp_location
*loc
)
7265 struct bp_location
*l
;
7266 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7267 (int (*) (const void *, const void *)) streq
,
7268 NULL
, xcalloc
, xfree
);
7270 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7273 const char *name
= l
->function_name
;
7275 /* Allow for some names to be NULL, ignore them. */
7279 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7281 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7296 update_breakpoint_locations (struct breakpoint
*b
,
7297 struct symtabs_and_lines sals
)
7301 struct bp_location
*existing_locations
= b
->loc
;
7303 /* If there's no new locations, and all existing locations
7304 are pending, don't do anything. This optimizes
7305 the common case where all locations are in the same
7306 shared library, that was unloaded. We'd like to
7307 retain the location, so that when the library
7308 is loaded again, we don't loose the enabled/disabled
7309 status of the individual locations. */
7310 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7315 for (i
= 0; i
< sals
.nelts
; ++i
)
7317 struct bp_location
*new_loc
=
7318 add_location_to_breakpoint (b
, b
->type
, &(sals
.sals
[i
]));
7320 /* Reparse conditions, they might contain references to the
7322 if (b
->cond_string
!= NULL
)
7324 struct gdb_exception e
;
7327 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7329 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7334 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7335 b
->number
, e
.message
);
7336 new_loc
->enabled
= 0;
7340 if (b
->source_file
!= NULL
)
7341 xfree (b
->source_file
);
7342 if (sals
.sals
[i
].symtab
== NULL
)
7343 b
->source_file
= NULL
;
7346 savestring (sals
.sals
[i
].symtab
->filename
,
7347 strlen (sals
.sals
[i
].symtab
->filename
));
7349 if (b
->line_number
== 0)
7350 b
->line_number
= sals
.sals
[i
].line
;
7353 /* If possible, carry over 'disable' status from existing breakpoints. */
7355 struct bp_location
*e
= existing_locations
;
7356 /* If there are multiple breakpoints with the same function name,
7357 e.g. for inline functions, comparing function names won't work.
7358 Instead compare pc addresses; this is just a heuristic as things
7359 may have moved, but in practice it gives the correct answer
7360 often enough until a better solution is found. */
7361 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7363 for (; e
; e
= e
->next
)
7365 if (!e
->enabled
&& e
->function_name
)
7367 struct bp_location
*l
= b
->loc
;
7368 if (have_ambiguous_names
)
7370 for (; l
; l
= l
->next
)
7371 if (e
->address
== l
->address
)
7379 for (; l
; l
= l
->next
)
7380 if (l
->function_name
7381 && strcmp (e
->function_name
, l
->function_name
) == 0)
7391 update_global_location_list ();
7395 /* Reset a breakpoint given it's struct breakpoint * BINT.
7396 The value we return ends up being the return value from catch_errors.
7397 Unused in this case. */
7400 breakpoint_re_set_one (void *bint
)
7402 /* get past catch_errs */
7403 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7407 int *not_found_ptr
= ¬_found
;
7408 struct symtabs_and_lines sals
= {};
7409 struct symtabs_and_lines expanded
;
7411 enum enable_state save_enable
;
7412 struct gdb_exception e
;
7418 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7422 case bp_hardware_breakpoint
:
7424 case bp_catch_unload
:
7425 if (b
->addr_string
== NULL
)
7427 /* Anything without a string can't be re-set. */
7428 delete_breakpoint (b
);
7432 set_language (b
->language
);
7433 input_radix
= b
->input_radix
;
7435 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7437 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7442 int not_found_and_ok
= 0;
7443 /* For pending breakpoints, it's expected that parsing
7444 will fail until the right shared library is loaded.
7445 User has already told to create pending breakpoints and
7446 don't need extra messages. If breakpoint is in bp_shlib_disabled
7447 state, then user already saw the message about that breakpoint
7448 being disabled, and don't want to see more errors. */
7450 && (b
->condition_not_parsed
7451 || (b
->loc
&& b
->loc
->shlib_disabled
)
7452 || b
->enable_state
== bp_disabled
))
7453 not_found_and_ok
= 1;
7455 if (!not_found_and_ok
)
7457 /* We surely don't want to warn about the same breakpoint
7458 10 times. One solution, implemented here, is disable
7459 the breakpoint on error. Another solution would be to
7460 have separate 'warning emitted' flag. Since this
7461 happens only when a binary has changed, I don't know
7462 which approach is better. */
7463 b
->enable_state
= bp_disabled
;
7464 throw_exception (e
);
7471 gdb_assert (sals
.nelts
== 1);
7472 resolve_sal_pc (&sals
.sals
[0]);
7473 if (b
->condition_not_parsed
&& s
&& s
[0])
7475 char *cond_string
= 0;
7477 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7478 &cond_string
, &thread
);
7480 b
->cond_string
= cond_string
;
7482 b
->condition_not_parsed
= 0;
7484 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7485 update_breakpoint_locations (b
, expanded
);
7491 case bp_hardware_watchpoint
:
7492 case bp_read_watchpoint
:
7493 case bp_access_watchpoint
:
7494 /* Watchpoint can be either on expression using entirely global variables,
7495 or it can be on local variables.
7497 Watchpoints of the first kind are never auto-deleted, and even persist
7498 across program restarts. Since they can use variables from shared
7499 libraries, we need to reparse expression as libraries are loaded
7502 Watchpoints on local variables can also change meaning as result
7503 of solib event. For example, if a watchpoint uses both a local and
7504 a global variables in expression, it's a local watchpoint, but
7505 unloading of a shared library will make the expression invalid.
7506 This is not a very common use case, but we still re-evaluate
7507 expression, to avoid surprises to the user.
7509 Note that for local watchpoints, we re-evaluate it only if
7510 watchpoints frame id is still valid. If it's not, it means
7511 the watchpoint is out of scope and will be deleted soon. In fact,
7512 I'm not sure we'll ever be called in this case.
7514 If a local watchpoint's frame id is still valid, then
7515 b->exp_valid_block is likewise valid, and we can safely use it.
7517 Don't do anything about disabled watchpoints, since they will
7518 be reevaluated again when enabled. */
7519 update_watchpoint (b
, 1 /* reparse */);
7521 /* We needn't really do anything to reset these, since the mask
7522 that requests them is unaffected by e.g., new libraries being
7525 case bp_catch_vfork
:
7530 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7532 /* Delete longjmp and overlay event breakpoints; they will be
7533 reset later by breakpoint_re_set. */
7535 case bp_longjmp_resume
:
7536 case bp_overlay_event
:
7537 delete_breakpoint (b
);
7540 /* This breakpoint is special, it's set up when the inferior
7541 starts and we really don't want to touch it. */
7542 case bp_shlib_event
:
7544 /* Like bp_shlib_event, this breakpoint type is special.
7545 Once it is set up, we do not want to touch it. */
7546 case bp_thread_event
:
7548 /* Keep temporary breakpoints, which can be encountered when we step
7549 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7550 Otherwise these should have been blown away via the cleanup chain
7551 or by breakpoint_init_inferior when we rerun the executable. */
7554 case bp_watchpoint_scope
:
7556 case bp_step_resume
:
7563 /* Re-set all breakpoints after symbols have been re-loaded. */
7565 breakpoint_re_set (void)
7567 struct breakpoint
*b
, *temp
;
7568 enum language save_language
;
7569 int save_input_radix
;
7571 save_language
= current_language
->la_language
;
7572 save_input_radix
= input_radix
;
7573 ALL_BREAKPOINTS_SAFE (b
, temp
)
7575 /* Format possible error msg */
7576 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7578 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7579 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7580 do_cleanups (cleanups
);
7582 set_language (save_language
);
7583 input_radix
= save_input_radix
;
7585 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
7587 create_longjmp_breakpoint ("longjmp");
7588 create_longjmp_breakpoint ("_longjmp");
7589 create_longjmp_breakpoint ("siglongjmp");
7590 create_longjmp_breakpoint ("_siglongjmp");
7591 create_longjmp_breakpoint (NULL
);
7594 create_overlay_event_breakpoint ("_ovly_debug_event");
7597 /* Reset the thread number of this breakpoint:
7599 - If the breakpoint is for all threads, leave it as-is.
7600 - Else, reset it to the current thread for inferior_ptid. */
7602 breakpoint_re_set_thread (struct breakpoint
*b
)
7604 if (b
->thread
!= -1)
7606 if (in_thread_list (inferior_ptid
))
7607 b
->thread
= pid_to_thread_id (inferior_ptid
);
7611 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7612 If from_tty is nonzero, it prints a message to that effect,
7613 which ends with a period (no newline). */
7616 set_ignore_count (int bptnum
, int count
, int from_tty
)
7618 struct breakpoint
*b
;
7624 if (b
->number
== bptnum
)
7626 b
->ignore_count
= count
;
7630 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7632 else if (count
== 1)
7633 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7636 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7639 breakpoints_changed ();
7640 breakpoint_modify_event (b
->number
);
7644 error (_("No breakpoint number %d."), bptnum
);
7647 /* Clear the ignore counts of all breakpoints. */
7649 breakpoint_clear_ignore_counts (void)
7651 struct breakpoint
*b
;
7654 b
->ignore_count
= 0;
7657 /* Command to set ignore-count of breakpoint N to COUNT. */
7660 ignore_command (char *args
, int from_tty
)
7666 error_no_arg (_("a breakpoint number"));
7668 num
= get_number (&p
);
7670 error (_("bad breakpoint number: '%s'"), args
);
7672 error (_("Second argument (specified ignore-count) is missing."));
7674 set_ignore_count (num
,
7675 longest_to_int (value_as_long (parse_and_eval (p
))),
7678 printf_filtered ("\n");
7681 /* Call FUNCTION on each of the breakpoints
7682 whose numbers are given in ARGS. */
7685 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7690 struct breakpoint
*b
, *tmp
;
7694 error_no_arg (_("one or more breakpoint numbers"));
7701 num
= get_number_or_range (&p1
);
7704 warning (_("bad breakpoint number at or near '%s'"), p
);
7708 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7709 if (b
->number
== num
)
7711 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7714 if (related_breakpoint
)
7715 function (related_breakpoint
);
7719 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7725 static struct bp_location
*
7726 find_location_by_number (char *number
)
7728 char *dot
= strchr (number
, '.');
7732 struct breakpoint
*b
;
7733 struct bp_location
*loc
;
7738 bp_num
= get_number_or_range (&p1
);
7740 error (_("Bad breakpoint number '%s'"), number
);
7743 if (b
->number
== bp_num
)
7748 if (!b
|| b
->number
!= bp_num
)
7749 error (_("Bad breakpoint number '%s'"), number
);
7752 loc_num
= get_number_or_range (&p1
);
7754 error (_("Bad breakpoint location number '%s'"), number
);
7758 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7761 error (_("Bad breakpoint location number '%s'"), dot
+1);
7767 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7768 If from_tty is nonzero, it prints a message to that effect,
7769 which ends with a period (no newline). */
7772 disable_breakpoint (struct breakpoint
*bpt
)
7774 /* Never disable a watchpoint scope breakpoint; we want to
7775 hit them when we leave scope so we can delete both the
7776 watchpoint and its scope breakpoint at that time. */
7777 if (bpt
->type
== bp_watchpoint_scope
)
7780 /* You can't disable permanent breakpoints. */
7781 if (bpt
->enable_state
== bp_permanent
)
7784 bpt
->enable_state
= bp_disabled
;
7786 update_global_location_list ();
7788 if (deprecated_modify_breakpoint_hook
)
7789 deprecated_modify_breakpoint_hook (bpt
);
7790 breakpoint_modify_event (bpt
->number
);
7794 disable_command (char *args
, int from_tty
)
7796 struct breakpoint
*bpt
;
7798 ALL_BREAKPOINTS (bpt
)
7802 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7807 case bp_catch_unload
:
7809 case bp_catch_vfork
:
7811 case bp_hardware_breakpoint
:
7813 case bp_hardware_watchpoint
:
7814 case bp_read_watchpoint
:
7815 case bp_access_watchpoint
:
7816 disable_breakpoint (bpt
);
7820 else if (strchr (args
, '.'))
7822 struct bp_location
*loc
= find_location_by_number (args
);
7825 update_global_location_list ();
7828 map_breakpoint_numbers (args
, disable_breakpoint
);
7832 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7834 int target_resources_ok
, other_type_used
;
7837 if (bpt
->type
== bp_hardware_breakpoint
)
7840 i
= hw_breakpoint_used_count ();
7841 target_resources_ok
=
7842 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7844 if (target_resources_ok
== 0)
7845 error (_("No hardware breakpoint support in the target."));
7846 else if (target_resources_ok
< 0)
7847 error (_("Hardware breakpoints used exceeds limit."));
7850 if (bpt
->type
== bp_watchpoint
||
7851 bpt
->type
== bp_hardware_watchpoint
||
7852 bpt
->type
== bp_read_watchpoint
||
7853 bpt
->type
== bp_access_watchpoint
)
7855 struct frame_id saved_frame_id
;
7857 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7858 if (bpt
->exp_valid_block
!= NULL
)
7860 struct frame_info
*fr
=
7861 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7864 printf_filtered (_("\
7865 Cannot enable watchpoint %d because the block in which its expression\n\
7866 is valid is not currently in scope.\n"), bpt
->number
);
7873 value_free (bpt
->val
);
7874 mark
= value_mark ();
7875 fetch_watchpoint_value (bpt
->exp
, &bpt
->val
, NULL
, NULL
);
7877 release_value (bpt
->val
);
7880 if (bpt
->type
== bp_hardware_watchpoint
||
7881 bpt
->type
== bp_read_watchpoint
||
7882 bpt
->type
== bp_access_watchpoint
)
7884 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7885 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7887 /* Hack around 'unused var' error for some targets here */
7888 (void) mem_cnt
, (void) i
;
7889 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7890 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7891 /* we can consider of type is bp_hardware_watchpoint, convert to
7892 bp_watchpoint in the following condition */
7893 if (target_resources_ok
< 0)
7895 printf_filtered (_("\
7896 Cannot enable watchpoint %d because target watch resources\n\
7897 have been allocated for other watchpoints.\n"), bpt
->number
);
7898 value_free_to_mark (mark
);
7903 select_frame (frame_find_by_id (saved_frame_id
));
7904 value_free_to_mark (mark
);
7907 if (bpt
->enable_state
!= bp_permanent
)
7908 bpt
->enable_state
= bp_enabled
;
7909 bpt
->disposition
= disposition
;
7910 update_global_location_list ();
7911 breakpoints_changed ();
7913 if (deprecated_modify_breakpoint_hook
)
7914 deprecated_modify_breakpoint_hook (bpt
);
7915 breakpoint_modify_event (bpt
->number
);
7920 enable_breakpoint (struct breakpoint
*bpt
)
7922 do_enable_breakpoint (bpt
, bpt
->disposition
);
7925 /* The enable command enables the specified breakpoints (or all defined
7926 breakpoints) so they once again become (or continue to be) effective
7927 in stopping the inferior. */
7930 enable_command (char *args
, int from_tty
)
7932 struct breakpoint
*bpt
;
7934 ALL_BREAKPOINTS (bpt
)
7938 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7943 case bp_catch_unload
:
7945 case bp_catch_vfork
:
7947 case bp_hardware_breakpoint
:
7949 case bp_hardware_watchpoint
:
7950 case bp_read_watchpoint
:
7951 case bp_access_watchpoint
:
7952 enable_breakpoint (bpt
);
7956 else if (strchr (args
, '.'))
7958 struct bp_location
*loc
= find_location_by_number (args
);
7961 update_global_location_list ();
7964 map_breakpoint_numbers (args
, enable_breakpoint
);
7968 enable_once_breakpoint (struct breakpoint
*bpt
)
7970 do_enable_breakpoint (bpt
, disp_disable
);
7974 enable_once_command (char *args
, int from_tty
)
7976 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7980 enable_delete_breakpoint (struct breakpoint
*bpt
)
7982 do_enable_breakpoint (bpt
, disp_del
);
7986 enable_delete_command (char *args
, int from_tty
)
7988 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7992 set_breakpoint_cmd (char *args
, int from_tty
)
7997 show_breakpoint_cmd (char *args
, int from_tty
)
8001 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
8003 struct symtabs_and_lines
8004 decode_line_spec_1 (char *string
, int funfirstline
)
8006 struct symtabs_and_lines sals
;
8008 error (_("Empty line specification."));
8009 if (default_breakpoint_valid
)
8010 sals
= decode_line_1 (&string
, funfirstline
,
8011 default_breakpoint_symtab
,
8012 default_breakpoint_line
,
8013 (char ***) NULL
, NULL
);
8015 sals
= decode_line_1 (&string
, funfirstline
,
8016 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
8018 error (_("Junk at end of line specification: %s"), string
);
8022 /* Create and insert a raw software breakpoint at PC. Return an
8023 identifier, which should be used to remove the breakpoint later.
8024 In general, places which call this should be using something on the
8025 breakpoint chain instead; this function should be eliminated
8029 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
8031 struct bp_target_info
*bp_tgt
;
8033 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
8034 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
8036 bp_tgt
->placed_address
= pc
;
8037 if (target_insert_breakpoint (bp_tgt
) != 0)
8039 /* Could not insert the breakpoint. */
8047 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
8050 deprecated_remove_raw_breakpoint (void *bp
)
8052 struct bp_target_info
*bp_tgt
= bp
;
8055 ret
= target_remove_breakpoint (bp_tgt
);
8061 /* One (or perhaps two) breakpoints used for software single stepping. */
8063 static void *single_step_breakpoints
[2];
8065 /* Create and insert a breakpoint for software single step. */
8068 insert_single_step_breakpoint (CORE_ADDR next_pc
)
8072 if (single_step_breakpoints
[0] == NULL
)
8073 bpt_p
= &single_step_breakpoints
[0];
8076 gdb_assert (single_step_breakpoints
[1] == NULL
);
8077 bpt_p
= &single_step_breakpoints
[1];
8080 /* NOTE drow/2006-04-11: A future improvement to this function would be
8081 to only create the breakpoints once, and actually put them on the
8082 breakpoint chain. That would let us use set_raw_breakpoint. We could
8083 adjust the addresses each time they were needed. Doing this requires
8084 corresponding changes elsewhere where single step breakpoints are
8085 handled, however. So, for now, we use this. */
8087 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
8089 error (_("Could not insert single-step breakpoint at 0x%s"),
8090 paddr_nz (next_pc
));
8093 /* Remove and delete any breakpoints used for software single step. */
8096 remove_single_step_breakpoints (void)
8098 gdb_assert (single_step_breakpoints
[0] != NULL
);
8100 /* See insert_single_step_breakpoint for more about this deprecated
8102 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8103 single_step_breakpoints
[0] = NULL
;
8105 if (single_step_breakpoints
[1] != NULL
)
8107 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8108 single_step_breakpoints
[1] = NULL
;
8112 /* Check whether a software single-step breakpoint is inserted at PC. */
8115 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8119 for (i
= 0; i
< 2; i
++)
8121 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8122 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8129 int breakpoints_always_inserted_mode (void)
8131 return always_inserted_mode
;
8135 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8136 It is defined as a macro to prevent duplication.
8137 COMMAND should be a string constant containing the name of the command. */
8138 #define BREAK_ARGS_HELP(command) \
8139 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8140 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8141 If a line number is specified, break at start of code for that line.\n\
8142 If a function is specified, break at start of code for that function.\n\
8143 If an address is specified, break at that exact address.\n\
8144 With no LOCATION, uses current execution address of selected stack frame.\n\
8145 This is useful for breaking on return to a stack frame.\n\
8147 THREADNUM is the number from \"info threads\".\n\
8148 CONDITION is a boolean expression.\n\
8150 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8152 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8155 _initialize_breakpoint (void)
8157 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8158 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8159 struct cmd_list_element
*c
;
8161 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8163 breakpoint_chain
= 0;
8164 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8165 before a breakpoint is set. */
8166 breakpoint_count
= 0;
8168 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8169 Set ignore-count of breakpoint number N to COUNT.\n\
8170 Usage is `ignore N COUNT'."));
8172 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8174 add_com ("commands", class_breakpoint
, commands_command
, _("\
8175 Set commands to be executed when a breakpoint is hit.\n\
8176 Give breakpoint number as argument after \"commands\".\n\
8177 With no argument, the targeted breakpoint is the last one set.\n\
8178 The commands themselves follow starting on the next line.\n\
8179 Type a line containing \"end\" to indicate the end of them.\n\
8180 Give \"silent\" as the first line to make the breakpoint silent;\n\
8181 then no output is printed when it is hit, except what the commands print."));
8183 add_com ("condition", class_breakpoint
, condition_command
, _("\
8184 Specify breakpoint number N to break only if COND is true.\n\
8185 Usage is `condition N COND', where N is an integer and COND is an\n\
8186 expression to be evaluated whenever breakpoint N is reached."));
8188 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8189 Set a temporary breakpoint.\n\
8190 Like \"break\" except the breakpoint is only temporary,\n\
8191 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8192 by using \"enable delete\" on the breakpoint number.\n\
8194 BREAK_ARGS_HELP ("tbreak")));
8195 set_cmd_completer (c
, location_completer
);
8197 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8198 Set a hardware assisted breakpoint.\n\
8199 Like \"break\" except the breakpoint requires hardware support,\n\
8200 some target hardware may not have this support.\n\
8202 BREAK_ARGS_HELP ("hbreak")));
8203 set_cmd_completer (c
, location_completer
);
8205 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8206 Set a temporary hardware assisted breakpoint.\n\
8207 Like \"hbreak\" except the breakpoint is only temporary,\n\
8208 so it will be deleted when hit.\n\
8210 BREAK_ARGS_HELP ("thbreak")));
8211 set_cmd_completer (c
, location_completer
);
8213 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8214 Enable some breakpoints.\n\
8215 Give breakpoint numbers (separated by spaces) as arguments.\n\
8216 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8217 This is used to cancel the effect of the \"disable\" command.\n\
8218 With a subcommand you can enable temporarily."),
8219 &enablelist
, "enable ", 1, &cmdlist
);
8221 add_com ("ab", class_breakpoint
, enable_command
, _("\
8222 Enable some breakpoints.\n\
8223 Give breakpoint numbers (separated by spaces) as arguments.\n\
8224 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8225 This is used to cancel the effect of the \"disable\" command.\n\
8226 With a subcommand you can enable temporarily."));
8228 add_com_alias ("en", "enable", class_breakpoint
, 1);
8230 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8231 Enable some breakpoints.\n\
8232 Give breakpoint numbers (separated by spaces) as arguments.\n\
8233 This is used to cancel the effect of the \"disable\" command.\n\
8234 May be abbreviated to simply \"enable\".\n"),
8235 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8237 add_cmd ("once", no_class
, enable_once_command
, _("\
8238 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8239 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8242 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8243 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8244 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8247 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8248 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8249 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8252 add_cmd ("once", no_class
, enable_once_command
, _("\
8253 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8254 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8257 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8258 Disable some breakpoints.\n\
8259 Arguments are breakpoint numbers with spaces in between.\n\
8260 To disable all breakpoints, give no argument.\n\
8261 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8262 &disablelist
, "disable ", 1, &cmdlist
);
8263 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8264 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8266 add_com ("sb", class_breakpoint
, disable_command
, _("\
8267 Disable some breakpoints.\n\
8268 Arguments are breakpoint numbers with spaces in between.\n\
8269 To disable all breakpoints, give no argument.\n\
8270 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8272 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8273 Disable some breakpoints.\n\
8274 Arguments are breakpoint numbers with spaces in between.\n\
8275 To disable all breakpoints, give no argument.\n\
8276 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8277 This command may be abbreviated \"disable\"."),
8280 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8281 Delete some breakpoints or auto-display expressions.\n\
8282 Arguments are breakpoint numbers with spaces in between.\n\
8283 To delete all breakpoints, give no argument.\n\
8285 Also a prefix command for deletion of other GDB objects.\n\
8286 The \"unset\" command is also an alias for \"delete\"."),
8287 &deletelist
, "delete ", 1, &cmdlist
);
8288 add_com_alias ("d", "delete", class_breakpoint
, 1);
8289 add_com_alias ("del", "delete", class_breakpoint
, 1);
8291 add_com ("db", class_breakpoint
, delete_command
, _("\
8292 Delete some breakpoints.\n\
8293 Arguments are breakpoint numbers with spaces in between.\n\
8294 To delete all breakpoints, give no argument.\n"));
8296 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8297 Delete some breakpoints or auto-display expressions.\n\
8298 Arguments are breakpoint numbers with spaces in between.\n\
8299 To delete all breakpoints, give no argument.\n\
8300 This command may be abbreviated \"delete\"."),
8303 add_com ("clear", class_breakpoint
, clear_command
, _("\
8304 Clear breakpoint at specified line or function.\n\
8305 Argument may be line number, function name, or \"*\" and an address.\n\
8306 If line number is specified, all breakpoints in that line are cleared.\n\
8307 If function is specified, breakpoints at beginning of function are cleared.\n\
8308 If an address is specified, breakpoints at that address are cleared.\n\
8310 With no argument, clears all breakpoints in the line that the selected frame\n\
8313 See also the \"delete\" command which clears breakpoints by number."));
8315 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8316 Set breakpoint at specified line or function.\n"
8317 BREAK_ARGS_HELP ("break")));
8318 set_cmd_completer (c
, location_completer
);
8320 add_com_alias ("b", "break", class_run
, 1);
8321 add_com_alias ("br", "break", class_run
, 1);
8322 add_com_alias ("bre", "break", class_run
, 1);
8323 add_com_alias ("brea", "break", class_run
, 1);
8327 add_com_alias ("ba", "break", class_breakpoint
, 1);
8328 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8333 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8334 Break in function/address or break at a line in the current file."),
8335 &stoplist
, "stop ", 1, &cmdlist
);
8336 add_cmd ("in", class_breakpoint
, stopin_command
,
8337 _("Break in function or address."), &stoplist
);
8338 add_cmd ("at", class_breakpoint
, stopat_command
,
8339 _("Break at a line in the current file."), &stoplist
);
8340 add_com ("status", class_info
, breakpoints_info
, _("\
8341 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8342 The \"Type\" column indicates one of:\n\
8343 \tbreakpoint - normal breakpoint\n\
8344 \twatchpoint - watchpoint\n\
8345 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8346 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8347 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8348 address and file/line number respectively.\n\
8350 Convenience variable \"$_\" and default examine address for \"x\"\n\
8351 are set to the address of the last breakpoint listed unless the command\n\
8352 is prefixed with \"server \".\n\n\
8353 Convenience variable \"$bpnum\" contains the number of the last\n\
8357 add_info ("breakpoints", breakpoints_info
, _("\
8358 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8359 The \"Type\" column indicates one of:\n\
8360 \tbreakpoint - normal breakpoint\n\
8361 \twatchpoint - watchpoint\n\
8362 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8363 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8364 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8365 address and file/line number respectively.\n\
8367 Convenience variable \"$_\" and default examine address for \"x\"\n\
8368 are set to the address of the last breakpoint listed unless the command\n\
8369 is prefixed with \"server \".\n\n\
8370 Convenience variable \"$bpnum\" contains the number of the last\n\
8374 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8375 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8376 The \"Type\" column indicates one of:\n\
8377 \tbreakpoint - normal breakpoint\n\
8378 \twatchpoint - watchpoint\n\
8379 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8380 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8381 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8382 address and file/line number respectively.\n\
8384 Convenience variable \"$_\" and default examine address for \"x\"\n\
8385 are set to the address of the last breakpoint listed unless the command\n\
8386 is prefixed with \"server \".\n\n\
8387 Convenience variable \"$bpnum\" contains the number of the last\n\
8390 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8391 Status of all breakpoints, or breakpoint number NUMBER.\n\
8392 The \"Type\" column indicates one of:\n\
8393 \tbreakpoint - normal breakpoint\n\
8394 \twatchpoint - watchpoint\n\
8395 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8396 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8397 \tuntil - internal breakpoint used by the \"until\" command\n\
8398 \tfinish - internal breakpoint used by the \"finish\" command\n\
8399 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8400 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8401 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8402 address and file/line number respectively.\n\
8404 Convenience variable \"$_\" and default examine address for \"x\"\n\
8405 are set to the address of the last breakpoint listed unless the command\n\
8406 is prefixed with \"server \".\n\n\
8407 Convenience variable \"$bpnum\" contains the number of the last\n\
8409 &maintenanceinfolist
);
8411 add_com ("catch", class_breakpoint
, catch_command
, _("\
8412 Set catchpoints to catch events.\n\
8413 Raised signals may be caught:\n\
8414 \tcatch signal - all signals\n\
8415 \tcatch signal <signame> - a particular signal\n\
8416 Raised exceptions may be caught:\n\
8417 \tcatch throw - all exceptions, when thrown\n\
8418 \tcatch throw <exceptname> - a particular exception, when thrown\n\
8419 \tcatch catch - all exceptions, when caught\n\
8420 \tcatch catch <exceptname> - a particular exception, when caught\n\
8421 Thread or process events may be caught:\n\
8422 \tcatch thread_start - any threads, just after creation\n\
8423 \tcatch thread_exit - any threads, just before expiration\n\
8424 \tcatch thread_join - any threads, just after joins\n\
8425 Process events may be caught:\n\
8426 \tcatch start - any processes, just after creation\n\
8427 \tcatch exit - any processes, just before expiration\n\
8428 \tcatch fork - calls to fork()\n\
8429 \tcatch vfork - calls to vfork()\n\
8430 \tcatch exec - calls to exec()\n\
8431 Dynamically-linked library events may be caught:\n\
8432 \tcatch load - loads of any library\n\
8433 \tcatch load <libname> - loads of a particular library\n\
8434 \tcatch unload - unloads of any library\n\
8435 \tcatch unload <libname> - unloads of a particular library\n\
8436 The act of your program's execution stopping may also be caught:\n\
8438 C++ exceptions may be caught:\n\
8439 \tcatch throw - all exceptions, when thrown\n\
8440 \tcatch catch - all exceptions, when caught\n\
8441 Ada exceptions may be caught:\n\
8442 \tcatch exception - all exceptions, when raised\n\
8443 \tcatch exception <name> - a particular exception, when raised\n\
8444 \tcatch exception unhandled - all unhandled exceptions, when raised\n\
8445 \tcatch assert - all failed assertions, when raised\n\
8447 Do \"help set follow-fork-mode\" for info on debugging your program\n\
8448 after a fork or vfork is caught.\n\n\
8449 Do \"help breakpoints\" for info on other commands dealing with breakpoints."));
8451 add_com ("tcatch", class_breakpoint
, tcatch_command
, _("\
8452 Set temporary catchpoints to catch events.\n\
8453 Args like \"catch\" command.\n\
8454 Like \"catch\" except the catchpoint is only temporary,\n\
8455 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
8456 by using \"enable delete\" on the catchpoint number."));
8458 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8459 Set a watchpoint for an expression.\n\
8460 A watchpoint stops execution of your program whenever the value of\n\
8461 an expression changes."));
8462 set_cmd_completer (c
, location_completer
);
8464 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8465 Set a read watchpoint for an expression.\n\
8466 A watchpoint stops execution of your program whenever the value of\n\
8467 an expression is read."));
8468 set_cmd_completer (c
, location_completer
);
8470 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8471 Set a watchpoint for an expression.\n\
8472 A watchpoint stops execution of your program whenever the value of\n\
8473 an expression is either read or written."));
8474 set_cmd_completer (c
, location_completer
);
8476 add_info ("watchpoints", breakpoints_info
,
8477 _("Synonym for ``info breakpoints''."));
8480 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8481 respond to changes - contrary to the description. */
8482 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8483 &can_use_hw_watchpoints
, _("\
8484 Set debugger's willingness to use watchpoint hardware."), _("\
8485 Show debugger's willingness to use watchpoint hardware."), _("\
8486 If zero, gdb will not use hardware for new watchpoints, even if\n\
8487 such is available. (However, any hardware watchpoints that were\n\
8488 created before setting this to nonzero, will continue to use watchpoint\n\
8491 show_can_use_hw_watchpoints
,
8492 &setlist
, &showlist
);
8494 can_use_hw_watchpoints
= 1;
8496 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8497 Breakpoint specific settings\n\
8498 Configure various breakpoint-specific variables such as\n\
8499 pending breakpoint behavior"),
8500 &breakpoint_set_cmdlist
, "set breakpoint ",
8501 0/*allow-unknown*/, &setlist
);
8502 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8503 Breakpoint specific settings\n\
8504 Configure various breakpoint-specific variables such as\n\
8505 pending breakpoint behavior"),
8506 &breakpoint_show_cmdlist
, "show breakpoint ",
8507 0/*allow-unknown*/, &showlist
);
8509 add_setshow_auto_boolean_cmd ("pending", no_class
,
8510 &pending_break_support
, _("\
8511 Set debugger's behavior regarding pending breakpoints."), _("\
8512 Show debugger's behavior regarding pending breakpoints."), _("\
8513 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8514 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8515 an error. If auto, an unrecognized breakpoint location results in a\n\
8516 user-query to see if a pending breakpoint should be created."),
8518 show_pending_break_support
,
8519 &breakpoint_set_cmdlist
,
8520 &breakpoint_show_cmdlist
);
8522 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8524 add_setshow_boolean_cmd ("auto-hw", no_class
,
8525 &automatic_hardware_breakpoints
, _("\
8526 Set automatic usage of hardware breakpoints."), _("\
8527 Show automatic usage of hardware breakpoints."), _("\
8528 If set, the debugger will automatically use hardware breakpoints for\n\
8529 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8530 a warning will be emitted for such breakpoints."),
8532 show_automatic_hardware_breakpoints
,
8533 &breakpoint_set_cmdlist
,
8534 &breakpoint_show_cmdlist
);
8536 add_setshow_boolean_cmd ("always-inserted", class_support
,
8537 &always_inserted_mode
, _("\
8538 Set mode for inserting breakpoints."), _("\
8539 Show mode for inserting breakpoints."), _("\
8540 When this mode is off (which is the default), breakpoints are inserted in\n\
8541 inferior when it is resumed, and removed when execution stops. When this\n\
8542 mode is on, breakpoints are inserted immediately and removed only when\n\
8543 the user deletes the breakpoint."),
8545 &show_always_inserted_mode
,
8546 &breakpoint_set_cmdlist
,
8547 &breakpoint_show_cmdlist
);
8549 automatic_hardware_breakpoints
= 1;