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, 2009 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"
28 #include "tracepoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
55 #include "exceptions.h"
62 /* readline include files */
63 #include "readline/readline.h"
64 #include "readline/history.h"
66 /* readline defines this. */
69 #include "mi/mi-common.h"
71 /* Arguments to pass as context to some catch command handlers. */
72 #define CATCH_PERMANENT ((void *) (uintptr_t) 0)
73 #define CATCH_TEMPORARY ((void *) (uintptr_t) 1)
75 /* Prototypes for local functions. */
77 static void enable_delete_command (char *, int);
79 static void enable_delete_breakpoint (struct breakpoint
*);
81 static void enable_once_command (char *, int);
83 static void enable_once_breakpoint (struct breakpoint
*);
85 static void disable_command (char *, int);
87 static void enable_command (char *, int);
89 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
91 static void ignore_command (char *, int);
93 static int breakpoint_re_set_one (void *);
95 static void clear_command (char *, int);
97 static void catch_command (char *, int);
99 static void watch_command (char *, int);
101 static int can_use_hardware_watchpoint (struct value
*);
103 static void break_command_1 (char *, int, int);
105 static void mention (struct breakpoint
*);
107 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
109 static void check_duplicates (struct breakpoint
*);
111 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
113 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
116 static void describe_other_breakpoints (CORE_ADDR
, struct obj_section
*, int);
118 static void breakpoints_info (char *, int);
120 static void breakpoint_1 (int, int);
122 static bpstat
bpstat_alloc (const struct bp_location
*, bpstat
);
124 static int breakpoint_cond_eval (void *);
126 static void cleanup_executing_breakpoints (void *);
128 static void commands_command (char *, int);
130 static void condition_command (char *, int);
132 static int get_number_trailer (char **, int);
134 void set_breakpoint_count (int);
143 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
145 static enum print_stop_action
print_it_typical (bpstat
);
147 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
149 static int watchpoint_check (void *);
151 static void maintenance_info_breakpoints (char *, int);
153 static void create_overlay_event_breakpoint (char *);
155 static int hw_breakpoint_used_count (void);
157 static int hw_watchpoint_used_count (enum bptype
, int *);
159 static void hbreak_command (char *, int);
161 static void thbreak_command (char *, int);
163 static void watch_command_1 (char *, int, int);
165 static void rwatch_command (char *, int);
167 static void awatch_command (char *, int);
169 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
171 static void stop_command (char *arg
, int from_tty
);
173 static void stopin_command (char *arg
, int from_tty
);
175 static void stopat_command (char *arg
, int from_tty
);
177 static char *ep_parse_optional_if_clause (char **arg
);
179 static char *ep_parse_optional_filename (char **arg
);
181 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
182 char *arg
, int tempflag
, int from_tty
);
184 static void tcatch_command (char *arg
, int from_tty
);
186 static void ep_skip_leading_whitespace (char **s
);
188 static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc
);
190 static void free_bp_location (struct bp_location
*loc
);
192 static struct bp_location
*allocate_bp_location (struct breakpoint
*bpt
);
194 static void update_global_location_list (int);
196 static void update_global_location_list_nothrow (int);
198 static int is_hardware_watchpoint (struct breakpoint
*bpt
);
200 static void insert_breakpoint_locations (void);
202 static void tracepoints_info (char *, int);
204 static void delete_trace_command (char *, int);
206 static void enable_trace_command (char *, int);
208 static void disable_trace_command (char *, int);
210 static void trace_pass_command (char *, int);
212 /* Flag indicating that a command has proceeded the inferior past the
213 current breakpoint. */
215 static int breakpoint_proceeded
;
218 bpdisp_text (enum bpdisp disp
)
220 /* NOTE: the following values are a part of MI protocol and represent
221 values of 'disp' field returned when inferior stops at a breakpoint. */
222 static char *bpdisps
[] = {"del", "dstp", "dis", "keep"};
223 return bpdisps
[(int) disp
];
226 /* Prototypes for exported functions. */
227 /* If FALSE, gdb will not use hardware support for watchpoints, even
228 if such is available. */
229 static int can_use_hw_watchpoints
;
232 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
233 struct cmd_list_element
*c
,
236 fprintf_filtered (file
, _("\
237 Debugger's willingness to use watchpoint hardware is %s.\n"),
241 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
242 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
243 for unrecognized breakpoint locations.
244 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
245 static enum auto_boolean pending_break_support
;
247 show_pending_break_support (struct ui_file
*file
, int from_tty
,
248 struct cmd_list_element
*c
,
251 fprintf_filtered (file
, _("\
252 Debugger's behavior regarding pending breakpoints is %s.\n"),
256 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
257 set with "break" but falling in read-only memory.
258 If 0, gdb will warn about such breakpoints, but won't automatically
259 use hardware breakpoints. */
260 static int automatic_hardware_breakpoints
;
262 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
263 struct cmd_list_element
*c
,
266 fprintf_filtered (file
, _("\
267 Automatic usage of hardware breakpoints is %s.\n"),
271 /* If on, gdb will keep breakpoints inserted even as inferior is
272 stopped, and immediately insert any new breakpoints. If off, gdb
273 will insert breakpoints into inferior only when resuming it, and
274 will remove breakpoints upon stop. If auto, GDB will behave as ON
275 if in non-stop mode, and as OFF if all-stop mode.*/
277 static const char always_inserted_auto
[] = "auto";
278 static const char always_inserted_on
[] = "on";
279 static const char always_inserted_off
[] = "off";
280 static const char *always_inserted_enums
[] = {
281 always_inserted_auto
,
286 static const char *always_inserted_mode
= always_inserted_auto
;
288 show_always_inserted_mode (struct ui_file
*file
, int from_tty
,
289 struct cmd_list_element
*c
, const char *value
)
291 if (always_inserted_mode
== always_inserted_auto
)
292 fprintf_filtered (file
, _("\
293 Always inserted breakpoint mode is %s (currently %s).\n"),
295 breakpoints_always_inserted_mode () ? "on" : "off");
297 fprintf_filtered (file
, _("Always inserted breakpoint mode is %s.\n"), value
);
301 breakpoints_always_inserted_mode (void)
303 return (always_inserted_mode
== always_inserted_on
304 || (always_inserted_mode
== always_inserted_auto
&& non_stop
));
307 void _initialize_breakpoint (void);
309 /* Are we executing breakpoint commands? */
310 static int executing_breakpoint_commands
;
312 /* Are overlay event breakpoints enabled? */
313 static int overlay_events_enabled
;
315 /* Walk the following statement or block through all breakpoints.
316 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
319 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
321 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
322 for (B = breakpoint_chain; \
323 B ? (TMP=B->next, 1): 0; \
326 /* Similar iterators for the low-level breakpoints. */
328 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->global_next)
330 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
331 for (B = bp_location_chain; \
332 B ? (TMP=B->global_next, 1): 0; \
335 /* Iterator for tracepoints only. */
337 #define ALL_TRACEPOINTS(B) \
338 for (B = breakpoint_chain; B; B = B->next) \
339 if ((B)->type == bp_tracepoint)
341 /* Chains of all breakpoints defined. */
343 struct breakpoint
*breakpoint_chain
;
345 struct bp_location
*bp_location_chain
;
347 /* The locations that no longer correspond to any breakpoint,
348 unlinked from bp_location_chain, but for which a hit
349 may still be reported by a target. */
350 VEC(bp_location_p
) *moribund_locations
= NULL
;
352 /* Number of last breakpoint made. */
354 int breakpoint_count
;
356 /* Number of last tracepoint made. */
358 int tracepoint_count
;
360 /* Return whether a breakpoint is an active enabled breakpoint. */
362 breakpoint_enabled (struct breakpoint
*b
)
364 return (b
->enable_state
== bp_enabled
);
367 /* Set breakpoint count to NUM. */
370 set_breakpoint_count (int num
)
372 breakpoint_count
= num
;
373 set_internalvar (lookup_internalvar ("bpnum"),
374 value_from_longest (builtin_type_int32
, (LONGEST
) num
));
377 /* Used in run_command to zero the hit count when a new run starts. */
380 clear_breakpoint_hit_counts (void)
382 struct breakpoint
*b
;
388 /* Default address, symtab and line to put a breakpoint at
389 for "break" command with no arg.
390 if default_breakpoint_valid is zero, the other three are
391 not valid, and "break" with no arg is an error.
393 This set by print_stack_frame, which calls set_default_breakpoint. */
395 int default_breakpoint_valid
;
396 CORE_ADDR default_breakpoint_address
;
397 struct symtab
*default_breakpoint_symtab
;
398 int default_breakpoint_line
;
400 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
401 Advance *PP after the string and any trailing whitespace.
403 Currently the string can either be a number or "$" followed by the name
404 of a convenience variable. Making it an expression wouldn't work well
405 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
407 If the string is a NULL pointer, that denotes the last breakpoint.
409 TRAILER is a character which can be found after the number; most
410 commonly this is `-'. If you don't want a trailer, use \0. */
412 get_number_trailer (char **pp
, int trailer
)
414 int retval
= 0; /* default */
418 /* Empty line means refer to the last breakpoint. */
419 return breakpoint_count
;
422 /* Make a copy of the name, so we can null-terminate it
423 to pass to lookup_internalvar(). */
428 while (isalnum (*p
) || *p
== '_')
430 varname
= (char *) alloca (p
- start
+ 1);
431 strncpy (varname
, start
, p
- start
);
432 varname
[p
- start
] = '\0';
433 val
= value_of_internalvar (lookup_internalvar (varname
));
434 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
435 retval
= (int) value_as_long (val
);
438 printf_filtered (_("Convenience variable must have integer value.\n"));
446 while (*p
>= '0' && *p
<= '9')
449 /* There is no number here. (e.g. "cond a == b"). */
451 /* Skip non-numeric token */
452 while (*p
&& !isspace((int) *p
))
454 /* Return zero, which caller must interpret as error. */
460 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
462 /* Trailing junk: return 0 and let caller print error msg. */
463 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
474 /* Like get_number_trailer, but don't allow a trailer. */
476 get_number (char **pp
)
478 return get_number_trailer (pp
, '\0');
481 /* Parse a number or a range.
482 * A number will be of the form handled by get_number.
483 * A range will be of the form <number1> - <number2>, and
484 * will represent all the integers between number1 and number2,
487 * While processing a range, this fuction is called iteratively;
488 * At each call it will return the next value in the range.
490 * At the beginning of parsing a range, the char pointer PP will
491 * be advanced past <number1> and left pointing at the '-' token.
492 * Subsequent calls will not advance the pointer until the range
493 * is completed. The call that completes the range will advance
494 * pointer PP past <number2>.
498 get_number_or_range (char **pp
)
500 static int last_retval
, end_value
;
501 static char *end_ptr
;
502 static int in_range
= 0;
506 /* Default case: pp is pointing either to a solo number,
507 or to the first number of a range. */
508 last_retval
= get_number_trailer (pp
, '-');
513 /* This is the start of a range (<number1> - <number2>).
514 Skip the '-', parse and remember the second number,
515 and also remember the end of the final token. */
519 while (isspace ((int) *end_ptr
))
520 end_ptr
++; /* skip white space */
521 end_value
= get_number (temp
);
522 if (end_value
< last_retval
)
524 error (_("inverted range"));
526 else if (end_value
== last_retval
)
528 /* degenerate range (number1 == number2). Advance the
529 token pointer so that the range will be treated as a
538 error (_("negative value"));
541 /* pp points to the '-' that betokens a range. All
542 number-parsing has already been done. Return the next
543 integer value (one greater than the saved previous value).
544 Do not advance the token pointer 'pp' until the end of range
547 if (++last_retval
== end_value
)
549 /* End of range reached; advance token pointer. */
559 /* condition N EXP -- set break condition of breakpoint N to EXP. */
562 condition_command (char *arg
, int from_tty
)
564 struct breakpoint
*b
;
569 error_no_arg (_("breakpoint number"));
572 bnum
= get_number (&p
);
574 error (_("Bad breakpoint argument: '%s'"), arg
);
577 if (b
->number
== bnum
)
579 struct bp_location
*loc
= b
->loc
;
580 for (; loc
; loc
= loc
->next
)
588 if (b
->cond_string
!= NULL
)
589 xfree (b
->cond_string
);
593 b
->cond_string
= NULL
;
595 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
600 /* I don't know if it matters whether this is the string the user
601 typed in or the decompiled expression. */
602 b
->cond_string
= savestring (arg
, strlen (arg
));
603 b
->condition_not_parsed
= 0;
604 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
608 parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
610 error (_("Junk at end of expression"));
613 breakpoints_changed ();
614 observer_notify_breakpoint_modified (b
->number
);
618 error (_("No breakpoint number %d."), bnum
);
622 commands_command (char *arg
, int from_tty
)
624 struct breakpoint
*b
;
627 struct command_line
*l
;
629 /* If we allowed this, we would have problems with when to
630 free the storage, if we change the commands currently
633 if (executing_breakpoint_commands
)
634 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
637 bnum
= get_number (&p
);
640 error (_("Unexpected extra arguments following breakpoint number."));
643 if (b
->number
== bnum
)
645 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
647 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
648 l
= read_command_lines (tmpbuf
, from_tty
, 1);
649 do_cleanups (cleanups
);
650 free_command_lines (&b
->commands
);
652 breakpoints_changed ();
653 observer_notify_breakpoint_modified (b
->number
);
656 error (_("No breakpoint number %d."), bnum
);
659 /* Like commands_command, but instead of reading the commands from
660 input stream, takes them from an already parsed command structure.
662 This is used by cli-script.c to DTRT with breakpoint commands
663 that are part of if and while bodies. */
664 enum command_control_type
665 commands_from_control_command (char *arg
, struct command_line
*cmd
)
667 struct breakpoint
*b
;
671 /* If we allowed this, we would have problems with when to
672 free the storage, if we change the commands currently
675 if (executing_breakpoint_commands
)
676 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
678 /* An empty string for the breakpoint number means the last
679 breakpoint, but get_number expects a NULL pointer. */
684 bnum
= get_number (&p
);
687 error (_("Unexpected extra arguments following breakpoint number."));
690 if (b
->number
== bnum
)
692 free_command_lines (&b
->commands
);
693 if (cmd
->body_count
!= 1)
694 error (_("Invalid \"commands\" block structure."));
695 /* We need to copy the commands because if/while will free the
696 list after it finishes execution. */
697 b
->commands
= copy_command_lines (cmd
->body_list
[0]);
698 breakpoints_changed ();
699 observer_notify_breakpoint_modified (b
->number
);
700 return simple_control
;
702 error (_("No breakpoint number %d."), bnum
);
705 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
706 by replacing any memory breakpoints with their shadowed contents. */
709 breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
, LONGEST len
)
711 struct bp_location
*b
;
712 CORE_ADDR bp_addr
= 0;
718 if (b
->owner
->type
== bp_none
)
719 warning (_("reading through apparently deleted breakpoint #%d?"),
722 if (b
->loc_type
!= bp_loc_software_breakpoint
)
726 /* Addresses and length of the part of the breakpoint that
728 bp_addr
= b
->target_info
.placed_address
;
729 bp_size
= b
->target_info
.shadow_len
;
731 /* bp isn't valid, or doesn't shadow memory. */
734 if (bp_addr
+ bp_size
<= memaddr
)
735 /* The breakpoint is entirely before the chunk of memory we
739 if (bp_addr
>= memaddr
+ len
)
740 /* The breakpoint is entirely after the chunk of memory we are
744 /* Offset within shadow_contents. */
745 if (bp_addr
< memaddr
)
747 /* Only copy the second part of the breakpoint. */
748 bp_size
-= memaddr
- bp_addr
;
749 bptoffset
= memaddr
- bp_addr
;
753 if (bp_addr
+ bp_size
> memaddr
+ len
)
755 /* Only copy the first part of the breakpoint. */
756 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
759 memcpy (buf
+ bp_addr
- memaddr
,
760 b
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
765 /* A wrapper function for inserting catchpoints. */
767 insert_catchpoint (struct ui_out
*uo
, void *args
)
769 struct breakpoint
*b
= (struct breakpoint
*) args
;
772 gdb_assert (b
->type
== bp_catchpoint
);
773 gdb_assert (b
->ops
!= NULL
&& b
->ops
->insert
!= NULL
);
779 is_hardware_watchpoint (struct breakpoint
*bpt
)
781 return (bpt
->type
== bp_hardware_watchpoint
782 || bpt
->type
== bp_read_watchpoint
783 || bpt
->type
== bp_access_watchpoint
);
786 /* Find the current value of a watchpoint on EXP. Return the value in
787 *VALP and *RESULTP and the chain of intermediate and final values
788 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
791 If a memory error occurs while evaluating the expression, *RESULTP will
792 be set to NULL. *RESULTP may be a lazy value, if the result could
793 not be read from memory. It is used to determine whether a value
794 is user-specified (we should watch the whole value) or intermediate
795 (we should watch only the bit used to locate the final value).
797 If the final value, or any intermediate value, could not be read
798 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
799 set to any referenced values. *VALP will never be a lazy value.
800 This is the value which we store in struct breakpoint.
802 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
803 value chain. The caller must free the values individually. If
804 VAL_CHAIN is NULL, all generated values will be left on the value
808 fetch_watchpoint_value (struct expression
*exp
, struct value
**valp
,
809 struct value
**resultp
, struct value
**val_chain
)
811 struct value
*mark
, *new_mark
, *result
;
812 volatile struct gdb_exception ex
;
820 /* Evaluate the expression. */
821 mark
= value_mark ();
824 TRY_CATCH (ex
, RETURN_MASK_ALL
)
826 result
= evaluate_expression (exp
);
830 /* Ignore memory errors, we want watchpoints pointing at
831 inaccessible memory to still be created; otherwise, throw the
832 error to some higher catcher. */
838 throw_exception (ex
);
843 new_mark
= value_mark ();
844 if (mark
== new_mark
)
849 /* Make sure it's not lazy, so that after the target stops again we
850 have a non-lazy previous value to compare with. */
852 && (!value_lazy (result
) || gdb_value_fetch_lazy (result
)))
857 /* Return the chain of intermediate values. We use this to
858 decide which addresses to watch. */
859 *val_chain
= new_mark
;
860 value_release_to_mark (mark
);
864 /* Assuming that B is a watchpoint:
865 - Reparse watchpoint expression, if REPARSE is non-zero
866 - Evaluate expression and store the result in B->val
867 - Evaluate the condition if there is one, and store the result
869 - Update the list of values that must be watched in B->loc.
871 If the watchpoint disposition is disp_del_at_next_stop, then do nothing.
872 If this is local watchpoint that is out of scope, delete it. */
874 update_watchpoint (struct breakpoint
*b
, int reparse
)
876 int within_current_scope
;
877 struct frame_id saved_frame_id
;
878 struct bp_location
*loc
;
881 /* We don't free locations. They are stored in bp_location_chain and
882 update_global_locations will eventually delete them and remove
883 breakpoints if needed. */
886 if (b
->disposition
== disp_del_at_next_stop
)
889 /* Save the current frame's ID so we can restore it after
890 evaluating the watchpoint expression on its own frame. */
891 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
892 took a frame parameter, so that we didn't have to change the
894 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
896 /* Determine if the watchpoint is within scope. */
897 if (b
->exp_valid_block
== NULL
)
898 within_current_scope
= 1;
901 struct frame_info
*fi
;
902 fi
= frame_find_by_id (b
->watchpoint_frame
);
903 within_current_scope
= (fi
!= NULL
);
904 if (within_current_scope
)
908 if (within_current_scope
&& reparse
)
917 b
->exp
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
918 /* If the meaning of expression itself changed, the old value is
919 no longer relevant. We don't want to report a watchpoint hit
920 to the user when the old value and the new value may actually
921 be completely different objects. */
927 /* If we failed to parse the expression, for example because
928 it refers to a global variable in a not-yet-loaded shared library,
929 don't try to insert watchpoint. We don't automatically delete
930 such watchpoint, though, since failure to parse expression
931 is different from out-of-scope watchpoint. */
932 if (within_current_scope
&& b
->exp
)
934 struct value
*val_chain
, *v
, *result
, *next
;
936 fetch_watchpoint_value (b
->exp
, &v
, &result
, &val_chain
);
938 /* Avoid setting b->val if it's already set. The meaning of
939 b->val is 'the last value' user saw, and we should update
940 it only if we reported that last value to user. As it
941 happens, the code that reports it updates b->val directly. */
948 /* Change the type of breakpoint between hardware assisted or an
949 ordinary watchpoint depending on the hardware support and free
950 hardware slots. REPARSE is set when the inferior is started. */
951 if ((b
->type
== bp_watchpoint
|| b
->type
== bp_hardware_watchpoint
)
954 int i
, mem_cnt
, other_type_used
;
956 i
= hw_watchpoint_used_count (bp_hardware_watchpoint
,
958 mem_cnt
= can_use_hardware_watchpoint (val_chain
);
961 b
->type
= bp_watchpoint
;
964 int target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT
965 (bp_hardware_watchpoint
, i
+ mem_cnt
, other_type_used
);
966 if (target_resources_ok
<= 0)
967 b
->type
= bp_watchpoint
;
969 b
->type
= bp_hardware_watchpoint
;
973 /* Look at each value on the value chain. */
974 for (v
= val_chain
; v
; v
= next
)
976 /* If it's a memory location, and GDB actually needed
977 its contents to evaluate the expression, then we
978 must watch it. If the first value returned is
979 still lazy, that means an error occurred reading it;
980 watch it anyway in case it becomes readable. */
981 if (VALUE_LVAL (v
) == lval_memory
982 && (v
== val_chain
|| ! value_lazy (v
)))
984 struct type
*vtype
= check_typedef (value_type (v
));
986 /* We only watch structs and arrays if user asked
987 for it explicitly, never if they just happen to
988 appear in the middle of some value chain. */
990 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
991 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
995 struct bp_location
*loc
, **tmp
;
997 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
998 len
= TYPE_LENGTH (value_type (v
));
1000 if (b
->type
== bp_read_watchpoint
)
1002 else if (b
->type
== bp_access_watchpoint
)
1005 loc
= allocate_bp_location (b
);
1006 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
1009 loc
->address
= addr
;
1011 loc
->watchpoint_type
= type
;
1015 next
= value_next (v
);
1020 /* We just regenerated the list of breakpoint locations.
1021 The new location does not have its condition field set to anything
1022 and therefore, we must always reparse the cond_string, independently
1023 of the value of the reparse flag. */
1024 if (b
->cond_string
!= NULL
)
1026 char *s
= b
->cond_string
;
1027 b
->loc
->cond
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
1030 else if (!within_current_scope
)
1032 printf_filtered (_("\
1033 Watchpoint %d deleted because the program has left the block \n\
1034 in which its expression is valid.\n"),
1036 if (b
->related_breakpoint
)
1037 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1038 b
->disposition
= disp_del_at_next_stop
;
1041 /* Restore the selected frame. */
1042 select_frame (frame_find_by_id (saved_frame_id
));
1046 /* Returns 1 iff breakpoint location should be
1047 inserted in the inferior. */
1049 should_be_inserted (struct bp_location
*bpt
)
1051 if (!breakpoint_enabled (bpt
->owner
))
1054 if (bpt
->owner
->disposition
== disp_del_at_next_stop
)
1057 if (!bpt
->enabled
|| bpt
->shlib_disabled
|| bpt
->duplicate
)
1060 /* Tracepoints are inserted by the target at a time of its choosing,
1062 if (bpt
->owner
->type
== bp_tracepoint
)
1068 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1069 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1070 and HW_BREAKPOINT_ERROR are used to report problems.
1072 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1073 method for each breakpoint or catchpoint type. */
1075 insert_bp_location (struct bp_location
*bpt
,
1076 struct ui_file
*tmp_error_stream
,
1077 int *disabled_breaks
,
1078 int *hw_breakpoint_error
)
1082 if (!should_be_inserted (bpt
) || bpt
->inserted
)
1085 /* Initialize the target-specific information. */
1086 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
1087 bpt
->target_info
.placed_address
= bpt
->address
;
1089 if (bpt
->loc_type
== bp_loc_software_breakpoint
1090 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1092 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
1094 /* If the explicitly specified breakpoint type
1095 is not hardware breakpoint, check the memory map to see
1096 if the breakpoint address is in read only memory or not.
1097 Two important cases are:
1098 - location type is not hardware breakpoint, memory
1099 is readonly. We change the type of the location to
1100 hardware breakpoint.
1101 - location type is hardware breakpoint, memory is read-write.
1102 This means we've previously made the location hardware one, but
1103 then the memory map changed, so we undo.
1105 When breakpoints are removed, remove_breakpoints will
1106 use location types we've just set here, the only possible
1107 problem is that memory map has changed during running program,
1108 but it's not going to work anyway with current gdb. */
1109 struct mem_region
*mr
1110 = lookup_mem_region (bpt
->target_info
.placed_address
);
1114 if (automatic_hardware_breakpoints
)
1117 enum bp_loc_type new_type
;
1119 if (mr
->attrib
.mode
!= MEM_RW
)
1120 new_type
= bp_loc_hardware_breakpoint
;
1122 new_type
= bp_loc_software_breakpoint
;
1124 if (new_type
!= bpt
->loc_type
)
1126 static int said
= 0;
1127 bpt
->loc_type
= new_type
;
1130 fprintf_filtered (gdb_stdout
, _("\
1131 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1136 else if (bpt
->loc_type
== bp_loc_software_breakpoint
1137 && mr
->attrib
.mode
!= MEM_RW
)
1138 warning (_("cannot set software breakpoint at readonly address %s"),
1139 paddr (bpt
->address
));
1143 /* First check to see if we have to handle an overlay. */
1144 if (overlay_debugging
== ovly_off
1145 || bpt
->section
== NULL
1146 || !(section_is_overlay (bpt
->section
)))
1148 /* No overlay handling: just set the breakpoint. */
1150 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1151 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1153 val
= target_insert_breakpoint (&bpt
->target_info
);
1157 /* This breakpoint is in an overlay section.
1158 Shall we set a breakpoint at the LMA? */
1159 if (!overlay_events_enabled
)
1161 /* Yes -- overlay event support is not active,
1162 so we must try to set a breakpoint at the LMA.
1163 This will not work for a hardware breakpoint. */
1164 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1165 warning (_("hardware breakpoint %d not supported in overlay!"),
1166 bpt
->owner
->number
);
1169 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
1171 /* Set a software (trap) breakpoint at the LMA. */
1172 bpt
->overlay_target_info
= bpt
->target_info
;
1173 bpt
->overlay_target_info
.placed_address
= addr
;
1174 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
1176 fprintf_unfiltered (tmp_error_stream
,
1177 "Overlay breakpoint %d failed: in ROM?\n",
1178 bpt
->owner
->number
);
1181 /* Shall we set a breakpoint at the VMA? */
1182 if (section_is_mapped (bpt
->section
))
1184 /* Yes. This overlay section is mapped into memory. */
1185 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1186 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1188 val
= target_insert_breakpoint (&bpt
->target_info
);
1192 /* No. This breakpoint will not be inserted.
1193 No error, but do not mark the bp as 'inserted'. */
1200 /* Can't set the breakpoint. */
1201 if (solib_name_from_address (bpt
->address
))
1203 /* See also: disable_breakpoints_in_shlibs. */
1205 bpt
->shlib_disabled
= 1;
1206 if (!*disabled_breaks
)
1208 fprintf_unfiltered (tmp_error_stream
,
1209 "Cannot insert breakpoint %d.\n",
1210 bpt
->owner
->number
);
1211 fprintf_unfiltered (tmp_error_stream
,
1212 "Temporarily disabling shared library breakpoints:\n");
1214 *disabled_breaks
= 1;
1215 fprintf_unfiltered (tmp_error_stream
,
1216 "breakpoint #%d\n", bpt
->owner
->number
);
1220 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1222 *hw_breakpoint_error
= 1;
1223 fprintf_unfiltered (tmp_error_stream
,
1224 "Cannot insert hardware breakpoint %d.\n",
1225 bpt
->owner
->number
);
1229 fprintf_unfiltered (tmp_error_stream
,
1230 "Cannot insert breakpoint %d.\n",
1231 bpt
->owner
->number
);
1232 fprintf_filtered (tmp_error_stream
,
1233 "Error accessing memory address ");
1234 fputs_filtered (paddress (bpt
->address
), tmp_error_stream
);
1235 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1236 safe_strerror (val
));
1247 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
1248 /* NOTE drow/2003-09-08: This state only exists for removing
1249 watchpoints. It's not clear that it's necessary... */
1250 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
1252 val
= target_insert_watchpoint (bpt
->address
,
1254 bpt
->watchpoint_type
);
1255 bpt
->inserted
= (val
!= -1);
1258 else if (bpt
->owner
->type
== bp_catchpoint
)
1260 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1261 bpt
->owner
, RETURN_MASK_ERROR
);
1262 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1263 bpt
->owner
->number
);
1265 bpt
->owner
->enable_state
= bp_disabled
;
1269 /* We've already printed an error message if there was a problem
1270 inserting this catchpoint, and we've disabled the catchpoint,
1271 so just return success. */
1278 /* Make sure all breakpoints are inserted in inferior.
1279 Throws exception on any error.
1280 A breakpoint that is already inserted won't be inserted
1281 again, so calling this function twice is safe. */
1283 insert_breakpoints (void)
1285 struct breakpoint
*bpt
;
1287 ALL_BREAKPOINTS (bpt
)
1288 if (is_hardware_watchpoint (bpt
))
1289 update_watchpoint (bpt
, 0 /* don't reparse. */);
1291 update_global_location_list (1);
1293 if (!breakpoints_always_inserted_mode ()
1294 && (target_has_execution
1295 || (gdbarch_has_global_solist (target_gdbarch
)
1296 && target_supports_multi_process ())))
1297 /* update_global_location_list does not insert breakpoints
1298 when always_inserted_mode is not enabled. Explicitly
1300 insert_breakpoint_locations ();
1303 /* insert_breakpoints is used when starting or continuing the program.
1304 remove_breakpoints is used when the program stops.
1305 Both return zero if successful,
1306 or an `errno' value if could not write the inferior. */
1309 insert_breakpoint_locations (void)
1311 struct breakpoint
*bpt
;
1312 struct bp_location
*b
, *temp
;
1315 int disabled_breaks
= 0;
1316 int hw_breakpoint_error
= 0;
1318 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1319 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (tmp_error_stream
);
1321 /* Explicitly mark the warning -- this will only be printed if
1322 there was an error. */
1323 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1325 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1327 if (!should_be_inserted (b
) || b
->inserted
)
1330 /* There is no point inserting thread-specific breakpoints if the
1331 thread no longer exists. */
1332 if (b
->owner
->thread
!= -1
1333 && !valid_thread_id (b
->owner
->thread
))
1336 val
= insert_bp_location (b
, tmp_error_stream
,
1338 &hw_breakpoint_error
);
1343 /* If we failed to insert all locations of a watchpoint,
1344 remove them, as half-inserted watchpoint is of limited use. */
1345 ALL_BREAKPOINTS (bpt
)
1347 int some_failed
= 0;
1348 struct bp_location
*loc
;
1350 if (!is_hardware_watchpoint (bpt
))
1353 if (!breakpoint_enabled (bpt
))
1356 if (bpt
->disposition
== disp_del_at_next_stop
)
1359 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1367 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1369 remove_breakpoint (loc
, mark_uninserted
);
1371 hw_breakpoint_error
= 1;
1372 fprintf_unfiltered (tmp_error_stream
,
1373 "Could not insert hardware watchpoint %d.\n",
1381 /* If a hardware breakpoint or watchpoint was inserted, add a
1382 message about possibly exhausted resources. */
1383 if (hw_breakpoint_error
)
1385 fprintf_unfiltered (tmp_error_stream
,
1386 "Could not insert hardware breakpoints:\n\
1387 You may have requested too many hardware breakpoints/watchpoints.\n");
1389 target_terminal_ours_for_output ();
1390 error_stream (tmp_error_stream
);
1393 do_cleanups (cleanups
);
1397 remove_breakpoints (void)
1399 struct bp_location
*b
;
1402 ALL_BP_LOCATIONS (b
)
1406 val
= remove_breakpoint (b
, mark_uninserted
);
1415 remove_hw_watchpoints (void)
1417 struct bp_location
*b
;
1420 ALL_BP_LOCATIONS (b
)
1422 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1424 val
= remove_breakpoint (b
, mark_uninserted
);
1433 reattach_breakpoints (int pid
)
1435 struct bp_location
*b
;
1437 struct cleanup
*old_chain
= save_inferior_ptid ();
1438 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1439 int dummy1
= 0, dummy2
= 0;
1441 make_cleanup_ui_file_delete (tmp_error_stream
);
1443 inferior_ptid
= pid_to_ptid (pid
);
1444 ALL_BP_LOCATIONS (b
)
1449 val
= insert_bp_location (b
, tmp_error_stream
,
1453 do_cleanups (old_chain
);
1458 do_cleanups (old_chain
);
1463 update_breakpoints_after_exec (void)
1465 struct breakpoint
*b
;
1466 struct breakpoint
*temp
;
1467 struct bp_location
*bploc
;
1469 /* We're about to delete breakpoints from GDB's lists. If the
1470 INSERTED flag is true, GDB will try to lift the breakpoints by
1471 writing the breakpoints' "shadow contents" back into memory. The
1472 "shadow contents" are NOT valid after an exec, so GDB should not
1473 do that. Instead, the target is responsible from marking
1474 breakpoints out as soon as it detects an exec. We don't do that
1475 here instead, because there may be other attempts to delete
1476 breakpoints after detecting an exec and before reaching here. */
1477 ALL_BP_LOCATIONS (bploc
)
1478 gdb_assert (!bploc
->inserted
);
1480 ALL_BREAKPOINTS_SAFE (b
, temp
)
1482 /* Solib breakpoints must be explicitly reset after an exec(). */
1483 if (b
->type
== bp_shlib_event
)
1485 delete_breakpoint (b
);
1489 /* Thread event breakpoints must be set anew after an exec(),
1490 as must overlay event breakpoints. */
1491 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1493 delete_breakpoint (b
);
1497 /* Step-resume breakpoints are meaningless after an exec(). */
1498 if (b
->type
== bp_step_resume
)
1500 delete_breakpoint (b
);
1504 /* Longjmp and longjmp-resume breakpoints are also meaningless
1506 if (b
->type
== bp_longjmp
|| b
->type
== bp_longjmp_resume
)
1508 delete_breakpoint (b
);
1512 if (b
->type
== bp_catchpoint
)
1514 /* For now, none of the bp_catchpoint breakpoints need to
1515 do anything at this point. In the future, if some of
1516 the catchpoints need to something, we will need to add
1517 a new method, and call this method from here. */
1521 /* bp_finish is a special case. The only way we ought to be able
1522 to see one of these when an exec() has happened, is if the user
1523 caught a vfork, and then said "finish". Ordinarily a finish just
1524 carries them to the call-site of the current callee, by setting
1525 a temporary bp there and resuming. But in this case, the finish
1526 will carry them entirely through the vfork & exec.
1528 We don't want to allow a bp_finish to remain inserted now. But
1529 we can't safely delete it, 'cause finish_command has a handle to
1530 the bp on a bpstat, and will later want to delete it. There's a
1531 chance (and I've seen it happen) that if we delete the bp_finish
1532 here, that its storage will get reused by the time finish_command
1533 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1534 We really must allow finish_command to delete a bp_finish.
1536 In the absense of a general solution for the "how do we know
1537 it's safe to delete something others may have handles to?"
1538 problem, what we'll do here is just uninsert the bp_finish, and
1539 let finish_command delete it.
1541 (We know the bp_finish is "doomed" in the sense that it's
1542 momentary, and will be deleted as soon as finish_command sees
1543 the inferior stopped. So it doesn't matter that the bp's
1544 address is probably bogus in the new a.out, unlike e.g., the
1545 solib breakpoints.) */
1547 if (b
->type
== bp_finish
)
1552 /* Without a symbolic address, we have little hope of the
1553 pre-exec() address meaning the same thing in the post-exec()
1555 if (b
->addr_string
== NULL
)
1557 delete_breakpoint (b
);
1561 /* FIXME what about longjmp breakpoints? Re-create them here? */
1562 create_overlay_event_breakpoint ("_ovly_debug_event");
1566 detach_breakpoints (int pid
)
1568 struct bp_location
*b
;
1570 struct cleanup
*old_chain
= save_inferior_ptid ();
1572 if (pid
== PIDGET (inferior_ptid
))
1573 error (_("Cannot detach breakpoints of inferior_ptid"));
1575 /* Set inferior_ptid; remove_breakpoint uses this global. */
1576 inferior_ptid
= pid_to_ptid (pid
);
1577 ALL_BP_LOCATIONS (b
)
1581 val
= remove_breakpoint (b
, mark_inserted
);
1584 do_cleanups (old_chain
);
1589 do_cleanups (old_chain
);
1594 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1598 if (b
->owner
->enable_state
== bp_permanent
)
1599 /* Permanent breakpoints cannot be inserted or removed. */
1602 /* The type of none suggests that owner is actually deleted.
1603 This should not ever happen. */
1604 gdb_assert (b
->owner
->type
!= bp_none
);
1606 if (b
->loc_type
== bp_loc_software_breakpoint
1607 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1609 /* "Normal" instruction breakpoint: either the standard
1610 trap-instruction bp (bp_breakpoint), or a
1611 bp_hardware_breakpoint. */
1613 /* First check to see if we have to handle an overlay. */
1614 if (overlay_debugging
== ovly_off
1615 || b
->section
== NULL
1616 || !(section_is_overlay (b
->section
)))
1618 /* No overlay handling: just remove the breakpoint. */
1620 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1621 val
= target_remove_hw_breakpoint (&b
->target_info
);
1623 val
= target_remove_breakpoint (&b
->target_info
);
1627 /* This breakpoint is in an overlay section.
1628 Did we set a breakpoint at the LMA? */
1629 if (!overlay_events_enabled
)
1631 /* Yes -- overlay event support is not active, so we
1632 should have set a breakpoint at the LMA. Remove it.
1634 /* Ignore any failures: if the LMA is in ROM, we will
1635 have already warned when we failed to insert it. */
1636 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1637 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1639 target_remove_breakpoint (&b
->overlay_target_info
);
1641 /* Did we set a breakpoint at the VMA?
1642 If so, we will have marked the breakpoint 'inserted'. */
1645 /* Yes -- remove it. Previously we did not bother to
1646 remove the breakpoint if the section had been
1647 unmapped, but let's not rely on that being safe. We
1648 don't know what the overlay manager might do. */
1649 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1650 val
= target_remove_hw_breakpoint (&b
->target_info
);
1652 /* However, we should remove *software* breakpoints only
1653 if the section is still mapped, or else we overwrite
1654 wrong code with the saved shadow contents. */
1655 else if (section_is_mapped (b
->section
))
1656 val
= target_remove_breakpoint (&b
->target_info
);
1662 /* No -- not inserted, so no need to remove. No error. */
1667 /* In some cases, we might not be able to remove a breakpoint
1668 in a shared library that has already been removed, but we
1669 have not yet processed the shlib unload event. */
1670 if (val
&& solib_name_from_address (b
->address
))
1675 b
->inserted
= (is
== mark_inserted
);
1677 else if (b
->loc_type
== bp_loc_hardware_watchpoint
)
1682 b
->inserted
= (is
== mark_inserted
);
1683 val
= target_remove_watchpoint (b
->address
, b
->length
,
1684 b
->watchpoint_type
);
1686 /* Failure to remove any of the hardware watchpoints comes here. */
1687 if ((is
== mark_uninserted
) && (b
->inserted
))
1688 warning (_("Could not remove hardware watchpoint %d."),
1691 else if (b
->owner
->type
== bp_catchpoint
1692 && breakpoint_enabled (b
->owner
)
1695 gdb_assert (b
->owner
->ops
!= NULL
&& b
->owner
->ops
->remove
!= NULL
);
1697 val
= b
->owner
->ops
->remove (b
->owner
);
1700 b
->inserted
= (is
== mark_inserted
);
1706 /* Clear the "inserted" flag in all breakpoints. */
1709 mark_breakpoints_out (void)
1711 struct bp_location
*bpt
;
1713 ALL_BP_LOCATIONS (bpt
)
1717 /* Clear the "inserted" flag in all breakpoints and delete any
1718 breakpoints which should go away between runs of the program.
1720 Plus other such housekeeping that has to be done for breakpoints
1723 Note: this function gets called at the end of a run (by
1724 generic_mourn_inferior) and when a run begins (by
1725 init_wait_for_inferior). */
1730 breakpoint_init_inferior (enum inf_context context
)
1732 struct breakpoint
*b
, *temp
;
1733 struct bp_location
*bpt
;
1736 /* If breakpoint locations are shared across processes, then there's
1738 if (gdbarch_has_global_solist (target_gdbarch
))
1741 ALL_BP_LOCATIONS (bpt
)
1742 if (bpt
->owner
->enable_state
!= bp_permanent
)
1745 ALL_BREAKPOINTS_SAFE (b
, temp
)
1750 case bp_watchpoint_scope
:
1752 /* If the call dummy breakpoint is at the entry point it will
1753 cause problems when the inferior is rerun, so we better
1756 Also get rid of scope breakpoints. */
1757 delete_breakpoint (b
);
1761 case bp_hardware_watchpoint
:
1762 case bp_read_watchpoint
:
1763 case bp_access_watchpoint
:
1765 /* Likewise for watchpoints on local expressions. */
1766 if (b
->exp_valid_block
!= NULL
)
1767 delete_breakpoint (b
);
1768 else if (context
== inf_starting
)
1770 /* Reset val field to force reread of starting value
1771 in insert_breakpoints. */
1773 value_free (b
->val
);
1783 /* Get rid of the moribund locations. */
1784 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, bpt
); ++ix
)
1785 free_bp_location (bpt
);
1786 VEC_free (bp_location_p
, moribund_locations
);
1789 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1790 exists at PC. It returns ordinary_breakpoint_here if it's an
1791 ordinary breakpoint, or permanent_breakpoint_here if it's a
1792 permanent breakpoint.
1793 - When continuing from a location with an ordinary breakpoint, we
1794 actually single step once before calling insert_breakpoints.
1795 - When continuing from a localion with a permanent breakpoint, we
1796 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1797 the target, to advance the PC past the breakpoint. */
1799 enum breakpoint_here
1800 breakpoint_here_p (CORE_ADDR pc
)
1802 const struct bp_location
*bpt
;
1803 int any_breakpoint_here
= 0;
1805 ALL_BP_LOCATIONS (bpt
)
1807 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1808 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1811 if ((breakpoint_enabled (bpt
->owner
)
1812 || bpt
->owner
->enable_state
== bp_permanent
)
1813 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1815 if (overlay_debugging
1816 && section_is_overlay (bpt
->section
)
1817 && !section_is_mapped (bpt
->section
))
1818 continue; /* unmapped overlay -- can't be a match */
1819 else if (bpt
->owner
->enable_state
== bp_permanent
)
1820 return permanent_breakpoint_here
;
1822 any_breakpoint_here
= 1;
1826 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1829 /* Return true if there's a moribund breakpoint at PC. */
1832 moribund_breakpoint_here_p (CORE_ADDR pc
)
1834 struct bp_location
*loc
;
1837 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
1838 if (loc
->address
== pc
)
1844 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1845 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1846 This does not check for single-step breakpoints, which are
1847 inserted and removed using direct target manipulation. */
1850 regular_breakpoint_inserted_here_p (CORE_ADDR pc
)
1852 const struct bp_location
*bpt
;
1854 ALL_BP_LOCATIONS (bpt
)
1856 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1857 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1861 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1863 if (overlay_debugging
1864 && section_is_overlay (bpt
->section
)
1865 && !section_is_mapped (bpt
->section
))
1866 continue; /* unmapped overlay -- can't be a match */
1874 /* Returns non-zero iff there's either regular breakpoint
1875 or a single step breakpoint inserted at PC. */
1878 breakpoint_inserted_here_p (CORE_ADDR pc
)
1880 if (regular_breakpoint_inserted_here_p (pc
))
1883 if (single_step_breakpoint_inserted_here_p (pc
))
1889 /* This function returns non-zero iff there is a software breakpoint
1893 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1895 const struct bp_location
*bpt
;
1896 int any_breakpoint_here
= 0;
1898 ALL_BP_LOCATIONS (bpt
)
1900 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1904 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1906 if (overlay_debugging
1907 && section_is_overlay (bpt
->section
)
1908 && !section_is_mapped (bpt
->section
))
1909 continue; /* unmapped overlay -- can't be a match */
1915 /* Also check for software single-step breakpoints. */
1916 if (single_step_breakpoint_inserted_here_p (pc
))
1922 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1923 PC is valid for process/thread PTID. */
1926 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1928 const struct bp_location
*bpt
;
1929 /* The thread ID associated to PTID, computed lazily. */
1932 ALL_BP_LOCATIONS (bpt
)
1934 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1935 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1938 if (!breakpoint_enabled (bpt
->owner
)
1939 && bpt
->owner
->enable_state
!= bp_permanent
)
1942 if (bpt
->address
!= pc
)
1945 if (bpt
->owner
->thread
!= -1)
1947 /* This is a thread-specific breakpoint. Check that ptid
1948 matches that thread. If thread hasn't been computed yet,
1949 it is now time to do so. */
1951 thread
= pid_to_thread_id (ptid
);
1952 if (bpt
->owner
->thread
!= thread
)
1956 if (overlay_debugging
1957 && section_is_overlay (bpt
->section
)
1958 && !section_is_mapped (bpt
->section
))
1959 continue; /* unmapped overlay -- can't be a match */
1968 /* bpstat stuff. External routines' interfaces are documented
1972 ep_is_catchpoint (struct breakpoint
*ep
)
1974 return (ep
->type
== bp_catchpoint
);
1978 bpstat_free (bpstat bs
)
1980 if (bs
->old_val
!= NULL
)
1981 value_free (bs
->old_val
);
1982 free_command_lines (&bs
->commands
);
1986 /* Clear a bpstat so that it says we are not at any breakpoint.
1987 Also free any storage that is part of a bpstat. */
1990 bpstat_clear (bpstat
*bsp
)
2007 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
2008 is part of the bpstat is copied as well. */
2011 bpstat_copy (bpstat bs
)
2015 bpstat retval
= NULL
;
2020 for (; bs
!= NULL
; bs
= bs
->next
)
2022 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
2023 memcpy (tmp
, bs
, sizeof (*tmp
));
2024 if (bs
->commands
!= NULL
)
2025 tmp
->commands
= copy_command_lines (bs
->commands
);
2026 if (bs
->old_val
!= NULL
)
2028 tmp
->old_val
= value_copy (bs
->old_val
);
2029 release_value (tmp
->old_val
);
2033 /* This is the first thing in the chain. */
2043 /* Find the bpstat associated with this breakpoint */
2046 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
2051 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2053 if (bsp
->breakpoint_at
&& bsp
->breakpoint_at
->owner
== breakpoint
)
2059 /* Find a step_resume breakpoint associated with this bpstat.
2060 (If there are multiple step_resume bp's on the list, this function
2061 will arbitrarily pick one.)
2063 It is an error to use this function if BPSTAT doesn't contain a
2064 step_resume breakpoint.
2066 See wait_for_inferior's use of this function. */
2068 bpstat_find_step_resume_breakpoint (bpstat bsp
)
2072 gdb_assert (bsp
!= NULL
);
2074 current_thread
= pid_to_thread_id (inferior_ptid
);
2076 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2078 if ((bsp
->breakpoint_at
!= NULL
) &&
2079 (bsp
->breakpoint_at
->owner
->type
== bp_step_resume
) &&
2080 (bsp
->breakpoint_at
->owner
->thread
== current_thread
||
2081 bsp
->breakpoint_at
->owner
->thread
== -1))
2082 return bsp
->breakpoint_at
->owner
;
2085 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2089 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2090 at. *BSP upon return is a bpstat which points to the remaining
2091 breakpoints stopped at (but which is not guaranteed to be good for
2092 anything but further calls to bpstat_num).
2093 Return 0 if passed a bpstat which does not indicate any breakpoints.
2094 Return -1 if stopped at a breakpoint that has been deleted since
2096 Return 1 otherwise. */
2099 bpstat_num (bpstat
*bsp
, int *num
)
2101 struct breakpoint
*b
;
2104 return 0; /* No more breakpoint values */
2106 /* We assume we'll never have several bpstats that
2107 correspond to a single breakpoint -- otherwise,
2108 this function might return the same number more
2109 than once and this will look ugly. */
2110 b
= (*bsp
)->breakpoint_at
? (*bsp
)->breakpoint_at
->owner
: NULL
;
2111 *bsp
= (*bsp
)->next
;
2113 return -1; /* breakpoint that's been deleted since */
2115 *num
= b
->number
; /* We have its number */
2119 /* Modify BS so that the actions will not be performed. */
2122 bpstat_clear_actions (bpstat bs
)
2124 for (; bs
!= NULL
; bs
= bs
->next
)
2126 free_command_lines (&bs
->commands
);
2127 if (bs
->old_val
!= NULL
)
2129 value_free (bs
->old_val
);
2135 /* Called when a command is about to proceed the inferior. */
2138 breakpoint_about_to_proceed (void)
2140 if (!ptid_equal (inferior_ptid
, null_ptid
))
2142 struct thread_info
*tp
= inferior_thread ();
2144 /* Allow inferior function calls in breakpoint commands to not
2145 interrupt the command list. When the call finishes
2146 successfully, the inferior will be standing at the same
2147 breakpoint as if nothing happened. */
2152 breakpoint_proceeded
= 1;
2155 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2157 cleanup_executing_breakpoints (void *ignore
)
2159 executing_breakpoint_commands
= 0;
2162 /* Execute all the commands associated with all the breakpoints at this
2163 location. Any of these commands could cause the process to proceed
2164 beyond this point, etc. We look out for such changes by checking
2165 the global "breakpoint_proceeded" after each command.
2167 Returns true if a breakpoint command resumed the inferior. In that
2168 case, it is the caller's responsibility to recall it again with the
2169 bpstat of the current thread. */
2172 bpstat_do_actions_1 (bpstat
*bsp
)
2175 struct cleanup
*old_chain
;
2178 /* Avoid endless recursion if a `source' command is contained
2180 if (executing_breakpoint_commands
)
2183 executing_breakpoint_commands
= 1;
2184 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2186 /* This pointer will iterate over the list of bpstat's. */
2189 breakpoint_proceeded
= 0;
2190 for (; bs
!= NULL
; bs
= bs
->next
)
2192 struct command_line
*cmd
;
2193 struct cleanup
*this_cmd_tree_chain
;
2195 /* Take ownership of the BSP's command tree, if it has one.
2197 The command tree could legitimately contain commands like
2198 'step' and 'next', which call clear_proceed_status, which
2199 frees stop_bpstat's command tree. To make sure this doesn't
2200 free the tree we're executing out from under us, we need to
2201 take ownership of the tree ourselves. Since a given bpstat's
2202 commands are only executed once, we don't need to copy it; we
2203 can clear the pointer in the bpstat, and make sure we free
2204 the tree when we're done. */
2207 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2211 execute_control_command (cmd
);
2213 if (breakpoint_proceeded
)
2219 /* We can free this command tree now. */
2220 do_cleanups (this_cmd_tree_chain
);
2222 if (breakpoint_proceeded
)
2224 if (target_can_async_p ())
2225 /* If we are in async mode, then the target might be still
2226 running, not stopped at any breakpoint, so nothing for
2227 us to do here -- just return to the event loop. */
2230 /* In sync mode, when execute_control_command returns
2231 we're already standing on the next breakpoint.
2232 Breakpoint commands for that stop were not run, since
2233 execute_command does not run breakpoint commands --
2234 only command_line_handler does, but that one is not
2235 involved in execution of breakpoint commands. So, we
2236 can now execute breakpoint commands. It should be
2237 noted that making execute_command do bpstat actions is
2238 not an option -- in this case we'll have recursive
2239 invocation of bpstat for each breakpoint with a
2240 command, and can easily blow up GDB stack. Instead, we
2241 return true, which will trigger the caller to recall us
2242 with the new stop_bpstat. */
2247 do_cleanups (old_chain
);
2252 bpstat_do_actions (void)
2254 /* Do any commands attached to breakpoint we are stopped at. */
2255 while (!ptid_equal (inferior_ptid
, null_ptid
)
2256 && target_has_execution
2257 && !is_exited (inferior_ptid
)
2258 && !is_executing (inferior_ptid
))
2259 /* Since in sync mode, bpstat_do_actions may resume the inferior,
2260 and only return when it is stopped at the next breakpoint, we
2261 keep doing breakpoint actions until it returns false to
2262 indicate the inferior was not resumed. */
2263 if (!bpstat_do_actions_1 (&inferior_thread ()->stop_bpstat
))
2267 /* Print out the (old or new) value associated with a watchpoint. */
2270 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2273 fprintf_unfiltered (stream
, _("<unreadable>"));
2276 struct value_print_options opts
;
2277 get_user_print_options (&opts
);
2278 value_print (val
, stream
, &opts
);
2282 /* This is the normal print function for a bpstat. In the future,
2283 much of this logic could (should?) be moved to bpstat_stop_status,
2284 by having it set different print_it values.
2286 Current scheme: When we stop, bpstat_print() is called. It loops
2287 through the bpstat list of things causing this stop, calling the
2288 print_bp_stop_message function on each one. The behavior of the
2289 print_bp_stop_message function depends on the print_it field of
2290 bpstat. If such field so indicates, call this function here.
2292 Return values from this routine (ultimately used by bpstat_print()
2293 and normal_stop() to decide what to do):
2294 PRINT_NOTHING: Means we already printed all we needed to print,
2295 don't print anything else.
2296 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2297 that something to be followed by a location.
2298 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2299 that something to be followed by a location.
2300 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2303 static enum print_stop_action
2304 print_it_typical (bpstat bs
)
2306 struct cleanup
*old_chain
;
2307 struct breakpoint
*b
;
2308 const struct bp_location
*bl
;
2309 struct ui_stream
*stb
;
2311 enum print_stop_action result
;
2313 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2314 which has since been deleted. */
2315 if (bs
->breakpoint_at
== NULL
)
2316 return PRINT_UNKNOWN
;
2317 bl
= bs
->breakpoint_at
;
2320 stb
= ui_out_stream_new (uiout
);
2321 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2326 case bp_hardware_breakpoint
:
2327 bp_temp
= bs
->breakpoint_at
->owner
->disposition
== disp_del
;
2328 if (bl
->address
!= bl
->requested_address
)
2329 breakpoint_adjustment_warning (bl
->requested_address
,
2332 annotate_breakpoint (b
->number
);
2334 ui_out_text (uiout
, "\nTemporary breakpoint ");
2336 ui_out_text (uiout
, "\nBreakpoint ");
2337 if (ui_out_is_mi_like_p (uiout
))
2339 ui_out_field_string (uiout
, "reason",
2340 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2341 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
2343 ui_out_field_int (uiout
, "bkptno", b
->number
);
2344 ui_out_text (uiout
, ", ");
2345 result
= PRINT_SRC_AND_LOC
;
2348 case bp_shlib_event
:
2349 /* Did we stop because the user set the stop_on_solib_events
2350 variable? (If so, we report this as a generic, "Stopped due
2351 to shlib event" message.) */
2352 printf_filtered (_("Stopped due to shared library event\n"));
2353 result
= PRINT_NOTHING
;
2356 case bp_thread_event
:
2357 /* Not sure how we will get here.
2358 GDB should not stop for these breakpoints. */
2359 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2360 result
= PRINT_NOTHING
;
2363 case bp_overlay_event
:
2364 /* By analogy with the thread event, GDB should not stop for these. */
2365 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2366 result
= PRINT_NOTHING
;
2370 case bp_hardware_watchpoint
:
2371 annotate_watchpoint (b
->number
);
2372 if (ui_out_is_mi_like_p (uiout
))
2375 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2377 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2378 ui_out_text (uiout
, "\nOld value = ");
2379 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2380 ui_out_field_stream (uiout
, "old", stb
);
2381 ui_out_text (uiout
, "\nNew value = ");
2382 watchpoint_value_print (b
->val
, stb
->stream
);
2383 ui_out_field_stream (uiout
, "new", stb
);
2384 ui_out_text (uiout
, "\n");
2385 /* More than one watchpoint may have been triggered. */
2386 result
= PRINT_UNKNOWN
;
2389 case bp_read_watchpoint
:
2390 if (ui_out_is_mi_like_p (uiout
))
2393 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2395 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2396 ui_out_text (uiout
, "\nValue = ");
2397 watchpoint_value_print (b
->val
, stb
->stream
);
2398 ui_out_field_stream (uiout
, "value", stb
);
2399 ui_out_text (uiout
, "\n");
2400 result
= PRINT_UNKNOWN
;
2403 case bp_access_watchpoint
:
2404 if (bs
->old_val
!= NULL
)
2406 annotate_watchpoint (b
->number
);
2407 if (ui_out_is_mi_like_p (uiout
))
2410 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2412 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2413 ui_out_text (uiout
, "\nOld value = ");
2414 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2415 ui_out_field_stream (uiout
, "old", stb
);
2416 ui_out_text (uiout
, "\nNew value = ");
2421 if (ui_out_is_mi_like_p (uiout
))
2424 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2425 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2426 ui_out_text (uiout
, "\nValue = ");
2428 watchpoint_value_print (b
->val
, stb
->stream
);
2429 ui_out_field_stream (uiout
, "new", stb
);
2430 ui_out_text (uiout
, "\n");
2431 result
= PRINT_UNKNOWN
;
2434 /* Fall through, we don't deal with these types of breakpoints
2438 if (ui_out_is_mi_like_p (uiout
))
2441 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2442 result
= PRINT_UNKNOWN
;
2446 if (ui_out_is_mi_like_p (uiout
))
2449 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2450 result
= PRINT_UNKNOWN
;
2455 case bp_longjmp_resume
:
2456 case bp_step_resume
:
2457 case bp_watchpoint_scope
:
2461 result
= PRINT_UNKNOWN
;
2465 do_cleanups (old_chain
);
2469 /* Generic routine for printing messages indicating why we
2470 stopped. The behavior of this function depends on the value
2471 'print_it' in the bpstat structure. Under some circumstances we
2472 may decide not to print anything here and delegate the task to
2475 static enum print_stop_action
2476 print_bp_stop_message (bpstat bs
)
2478 switch (bs
->print_it
)
2481 /* Nothing should be printed for this bpstat entry. */
2482 return PRINT_UNKNOWN
;
2486 /* We still want to print the frame, but we already printed the
2487 relevant messages. */
2488 return PRINT_SRC_AND_LOC
;
2491 case print_it_normal
:
2493 const struct bp_location
*bl
= bs
->breakpoint_at
;
2494 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2496 /* Normal case. Call the breakpoint's print_it method, or
2497 print_it_typical. */
2498 /* FIXME: how breakpoint can ever be NULL here? */
2499 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2500 return b
->ops
->print_it (b
);
2502 return print_it_typical (bs
);
2507 internal_error (__FILE__
, __LINE__
,
2508 _("print_bp_stop_message: unrecognized enum value"));
2513 /* Print a message indicating what happened. This is called from
2514 normal_stop(). The input to this routine is the head of the bpstat
2515 list - a list of the eventpoints that caused this stop. This
2516 routine calls the generic print routine for printing a message
2517 about reasons for stopping. This will print (for example) the
2518 "Breakpoint n," part of the output. The return value of this
2521 PRINT_UNKNOWN: Means we printed nothing
2522 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2523 code to print the location. An example is
2524 "Breakpoint 1, " which should be followed by
2526 PRINT_SRC_ONLY: Means we printed something, but there is no need
2527 to also print the location part of the message.
2528 An example is the catch/throw messages, which
2529 don't require a location appended to the end.
2530 PRINT_NOTHING: We have done some printing and we don't need any
2531 further info to be printed.*/
2533 enum print_stop_action
2534 bpstat_print (bpstat bs
)
2538 /* Maybe another breakpoint in the chain caused us to stop.
2539 (Currently all watchpoints go on the bpstat whether hit or not.
2540 That probably could (should) be changed, provided care is taken
2541 with respect to bpstat_explains_signal). */
2542 for (; bs
; bs
= bs
->next
)
2544 val
= print_bp_stop_message (bs
);
2545 if (val
== PRINT_SRC_ONLY
2546 || val
== PRINT_SRC_AND_LOC
2547 || val
== PRINT_NOTHING
)
2551 /* We reached the end of the chain, or we got a null BS to start
2552 with and nothing was printed. */
2553 return PRINT_UNKNOWN
;
2556 /* Evaluate the expression EXP and return 1 if value is zero.
2557 This is used inside a catch_errors to evaluate the breakpoint condition.
2558 The argument is a "struct expression *" that has been cast to char * to
2559 make it pass through catch_errors. */
2562 breakpoint_cond_eval (void *exp
)
2564 struct value
*mark
= value_mark ();
2565 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2566 value_free_to_mark (mark
);
2570 /* Allocate a new bpstat and chain it to the current one. */
2573 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2577 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2579 bs
->breakpoint_at
= bl
;
2580 /* If the condition is false, etc., don't do the commands. */
2581 bs
->commands
= NULL
;
2583 bs
->print_it
= print_it_normal
;
2587 /* The target has stopped with waitstatus WS. Check if any hardware
2588 watchpoints have triggered, according to the target. */
2591 watchpoints_triggered (struct target_waitstatus
*ws
)
2593 int stopped_by_watchpoint
= STOPPED_BY_WATCHPOINT (*ws
);
2595 struct breakpoint
*b
;
2597 if (!stopped_by_watchpoint
)
2599 /* We were not stopped by a watchpoint. Mark all watchpoints
2600 as not triggered. */
2602 if (b
->type
== bp_hardware_watchpoint
2603 || b
->type
== bp_read_watchpoint
2604 || b
->type
== bp_access_watchpoint
)
2605 b
->watchpoint_triggered
= watch_triggered_no
;
2610 if (!target_stopped_data_address (¤t_target
, &addr
))
2612 /* We were stopped by a watchpoint, but we don't know where.
2613 Mark all watchpoints as unknown. */
2615 if (b
->type
== bp_hardware_watchpoint
2616 || b
->type
== bp_read_watchpoint
2617 || b
->type
== bp_access_watchpoint
)
2618 b
->watchpoint_triggered
= watch_triggered_unknown
;
2620 return stopped_by_watchpoint
;
2623 /* The target could report the data address. Mark watchpoints
2624 affected by this data address as triggered, and all others as not
2628 if (b
->type
== bp_hardware_watchpoint
2629 || b
->type
== bp_read_watchpoint
2630 || b
->type
== bp_access_watchpoint
)
2632 struct bp_location
*loc
;
2635 b
->watchpoint_triggered
= watch_triggered_no
;
2636 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2637 /* Exact match not required. Within range is
2639 if (target_watchpoint_addr_within_range (¤t_target
,
2643 b
->watchpoint_triggered
= watch_triggered_yes
;
2651 /* Possible return values for watchpoint_check (this can't be an enum
2652 because of check_errors). */
2653 /* The watchpoint has been deleted. */
2654 #define WP_DELETED 1
2655 /* The value has changed. */
2656 #define WP_VALUE_CHANGED 2
2657 /* The value has not changed. */
2658 #define WP_VALUE_NOT_CHANGED 3
2660 #define BP_TEMPFLAG 1
2661 #define BP_HARDWAREFLAG 2
2663 /* Check watchpoint condition. */
2666 watchpoint_check (void *p
)
2668 bpstat bs
= (bpstat
) p
;
2669 struct breakpoint
*b
;
2670 struct frame_info
*fr
;
2671 int within_current_scope
;
2673 b
= bs
->breakpoint_at
->owner
;
2675 if (b
->exp_valid_block
== NULL
)
2676 within_current_scope
= 1;
2679 /* There is no current frame at this moment. If we're going to have
2680 any chance of handling watchpoints on local variables, we'll need
2681 the frame chain (so we can determine if we're in scope). */
2682 reinit_frame_cache ();
2683 fr
= frame_find_by_id (b
->watchpoint_frame
);
2684 within_current_scope
= (fr
!= NULL
);
2686 /* If we've gotten confused in the unwinder, we might have
2687 returned a frame that can't describe this variable. */
2688 if (within_current_scope
2689 && (block_linkage_function (b
->exp_valid_block
)
2690 != get_frame_function (fr
)))
2691 within_current_scope
= 0;
2693 /* in_function_epilogue_p() returns a non-zero value if we're still
2694 in the function but the stack frame has already been invalidated.
2695 Since we can't rely on the values of local variables after the
2696 stack has been destroyed, we are treating the watchpoint in that
2697 state as `not changed' without further checking.
2699 vinschen/2003-09-04: The former implementation left out the case
2700 that the watchpoint frame couldn't be found by frame_find_by_id()
2701 because the current PC is currently in an epilogue. Calling
2702 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2703 if ((!within_current_scope
|| fr
== get_current_frame ())
2704 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2705 return WP_VALUE_NOT_CHANGED
;
2706 if (fr
&& within_current_scope
)
2707 /* If we end up stopping, the current frame will get selected
2708 in normal_stop. So this call to select_frame won't affect
2713 if (within_current_scope
)
2715 /* We use value_{,free_to_}mark because it could be a
2716 *long* time before we return to the command level and
2717 call free_all_values. We can't call free_all_values because
2718 we might be in the middle of evaluating a function call. */
2720 struct value
*mark
= value_mark ();
2721 struct value
*new_val
;
2723 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2724 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2725 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2727 if (new_val
!= NULL
)
2729 release_value (new_val
);
2730 value_free_to_mark (mark
);
2732 bs
->old_val
= b
->val
;
2735 /* We will stop here */
2736 return WP_VALUE_CHANGED
;
2740 /* Nothing changed, don't do anything. */
2741 value_free_to_mark (mark
);
2742 /* We won't stop here */
2743 return WP_VALUE_NOT_CHANGED
;
2748 /* This seems like the only logical thing to do because
2749 if we temporarily ignored the watchpoint, then when
2750 we reenter the block in which it is valid it contains
2751 garbage (in the case of a function, it may have two
2752 garbage values, one before and one after the prologue).
2753 So we can't even detect the first assignment to it and
2754 watch after that (since the garbage may or may not equal
2755 the first value assigned). */
2756 /* We print all the stop information in print_it_typical(), but
2757 in this case, by the time we call print_it_typical() this bp
2758 will be deleted already. So we have no choice but print the
2759 information here. */
2760 if (ui_out_is_mi_like_p (uiout
))
2762 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2763 ui_out_text (uiout
, "\nWatchpoint ");
2764 ui_out_field_int (uiout
, "wpnum", b
->number
);
2765 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2766 which its expression is valid.\n");
2768 if (b
->related_breakpoint
)
2769 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2770 b
->disposition
= disp_del_at_next_stop
;
2776 /* Return true if it looks like target has stopped due to hitting
2777 breakpoint location BL. This function does not check if we
2778 should stop, only if BL explains the stop. */
2780 bpstat_check_location (const struct bp_location
*bl
, CORE_ADDR bp_addr
)
2782 struct breakpoint
*b
= bl
->owner
;
2784 if (b
->type
!= bp_watchpoint
2785 && b
->type
!= bp_hardware_watchpoint
2786 && b
->type
!= bp_read_watchpoint
2787 && b
->type
!= bp_access_watchpoint
2788 && b
->type
!= bp_hardware_breakpoint
2789 && b
->type
!= bp_catchpoint
) /* a non-watchpoint bp */
2791 if (bl
->address
!= bp_addr
) /* address doesn't match */
2793 if (overlay_debugging
/* unmapped overlay section */
2794 && section_is_overlay (bl
->section
)
2795 && !section_is_mapped (bl
->section
))
2799 /* Continuable hardware watchpoints are treated as non-existent if the
2800 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2801 some data address). Otherwise gdb won't stop on a break instruction
2802 in the code (not from a breakpoint) when a hardware watchpoint has
2803 been defined. Also skip watchpoints which we know did not trigger
2804 (did not match the data address). */
2806 if ((b
->type
== bp_hardware_watchpoint
2807 || b
->type
== bp_read_watchpoint
2808 || b
->type
== bp_access_watchpoint
)
2809 && b
->watchpoint_triggered
== watch_triggered_no
)
2812 if (b
->type
== bp_hardware_breakpoint
)
2814 if (bl
->address
!= bp_addr
)
2816 if (overlay_debugging
/* unmapped overlay section */
2817 && section_is_overlay (bl
->section
)
2818 && !section_is_mapped (bl
->section
))
2822 if (b
->type
== bp_catchpoint
)
2824 gdb_assert (b
->ops
!= NULL
&& b
->ops
->breakpoint_hit
!= NULL
);
2825 if (!b
->ops
->breakpoint_hit (b
))
2832 /* If BS refers to a watchpoint, determine if the watched values
2833 has actually changed, and we should stop. If not, set BS->stop
2836 bpstat_check_watchpoint (bpstat bs
)
2838 const struct bp_location
*bl
= bs
->breakpoint_at
;
2839 struct breakpoint
*b
= bl
->owner
;
2841 if (b
->type
== bp_watchpoint
2842 || b
->type
== bp_read_watchpoint
2843 || b
->type
== bp_access_watchpoint
2844 || b
->type
== bp_hardware_watchpoint
)
2848 int must_check_value
= 0;
2850 if (b
->type
== bp_watchpoint
)
2851 /* For a software watchpoint, we must always check the
2853 must_check_value
= 1;
2854 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2855 /* We have a hardware watchpoint (read, write, or access)
2856 and the target earlier reported an address watched by
2858 must_check_value
= 1;
2859 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2860 && b
->type
== bp_hardware_watchpoint
)
2861 /* We were stopped by a hardware watchpoint, but the target could
2862 not report the data address. We must check the watchpoint's
2863 value. Access and read watchpoints are out of luck; without
2864 a data address, we can't figure it out. */
2865 must_check_value
= 1;
2867 if (must_check_value
)
2869 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2871 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2872 int e
= catch_errors (watchpoint_check
, bs
, message
,
2874 do_cleanups (cleanups
);
2878 /* We've already printed what needs to be printed. */
2879 bs
->print_it
= print_it_done
;
2882 case WP_VALUE_CHANGED
:
2883 if (b
->type
== bp_read_watchpoint
)
2885 /* Don't stop: read watchpoints shouldn't fire if
2886 the value has changed. This is for targets
2887 which cannot set read-only watchpoints. */
2888 bs
->print_it
= print_it_noop
;
2892 case WP_VALUE_NOT_CHANGED
:
2893 if (b
->type
== bp_hardware_watchpoint
2894 || b
->type
== bp_watchpoint
)
2896 /* Don't stop: write watchpoints shouldn't fire if
2897 the value hasn't changed. */
2898 bs
->print_it
= print_it_noop
;
2906 /* Error from catch_errors. */
2907 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2908 if (b
->related_breakpoint
)
2909 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2910 b
->disposition
= disp_del_at_next_stop
;
2911 /* We've already printed what needs to be printed. */
2912 bs
->print_it
= print_it_done
;
2916 else /* must_check_value == 0 */
2918 /* This is a case where some watchpoint(s) triggered, but
2919 not at the address of this watchpoint, or else no
2920 watchpoint triggered after all. So don't print
2921 anything for this watchpoint. */
2922 bs
->print_it
= print_it_noop
;
2929 /* Check conditions (condition proper, frame, thread and ignore count)
2930 of breakpoint referred to by BS. If we should not stop for this
2931 breakpoint, set BS->stop to 0. */
2933 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
2935 int thread_id
= pid_to_thread_id (ptid
);
2936 const struct bp_location
*bl
= bs
->breakpoint_at
;
2937 struct breakpoint
*b
= bl
->owner
;
2939 if (frame_id_p (b
->frame_id
)
2940 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2944 int value_is_zero
= 0;
2946 /* If this is a scope breakpoint, mark the associated
2947 watchpoint as triggered so that we will handle the
2948 out-of-scope event. We'll get to the watchpoint next
2950 if (b
->type
== bp_watchpoint_scope
)
2951 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
2953 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
2955 /* We use value_mark and value_free_to_mark because it could
2956 be a long time before we return to the command level and
2957 call free_all_values. We can't call free_all_values
2958 because we might be in the middle of evaluating a
2960 struct value
*mark
= value_mark ();
2962 /* Need to select the frame, with all that implies
2963 so that the conditions will have the right context. */
2964 select_frame (get_current_frame ());
2966 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
2967 "Error in testing breakpoint condition:\n",
2969 /* FIXME-someday, should give breakpoint # */
2970 value_free_to_mark (mark
);
2972 if (bl
->cond
&& value_is_zero
)
2976 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2980 else if (b
->ignore_count
> 0)
2983 annotate_ignore_count_change ();
2985 /* Increase the hit count even though we don't
2993 /* Get a bpstat associated with having just stopped at address
2994 BP_ADDR in thread PTID.
2996 Determine whether we stopped at a breakpoint, etc, or whether we
2997 don't understand this stop. Result is a chain of bpstat's such that:
2999 if we don't understand the stop, the result is a null pointer.
3001 if we understand why we stopped, the result is not null.
3003 Each element of the chain refers to a particular breakpoint or
3004 watchpoint at which we have stopped. (We may have stopped for
3005 several reasons concurrently.)
3007 Each element of the chain has valid next, breakpoint_at,
3008 commands, FIXME??? fields. */
3011 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
3013 struct breakpoint
*b
= NULL
;
3014 const struct bp_location
*bl
;
3015 struct bp_location
*loc
;
3016 /* Root of the chain of bpstat's */
3017 struct bpstats root_bs
[1];
3018 /* Pointer to the last thing in the chain currently. */
3019 bpstat bs
= root_bs
;
3021 int need_remove_insert
;
3023 ALL_BP_LOCATIONS (bl
)
3027 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
3030 /* For hardware watchpoints, we look only at the first location.
3031 The watchpoint_check function will work on entire expression,
3032 not the individual locations. For read watchopints, the
3033 watchpoints_triggered function have checked all locations
3036 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
3039 if (!bpstat_check_location (bl
, bp_addr
))
3042 /* Come here if it's a watchpoint, or if the break address matches */
3044 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
3046 /* Assume we stop. Should we find watchpoint that is not actually
3047 triggered, or if condition of breakpoint is false, we'll reset
3052 bpstat_check_watchpoint (bs
);
3056 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
3057 /* We do not stop for these. */
3060 bpstat_check_breakpoint_conditions (bs
, ptid
);
3066 /* We will stop here */
3067 if (b
->disposition
== disp_disable
)
3069 if (b
->enable_state
!= bp_permanent
)
3070 b
->enable_state
= bp_disabled
;
3071 update_global_location_list (0);
3075 bs
->commands
= b
->commands
;
3077 (strcmp ("silent", bs
->commands
->line
) == 0
3078 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3080 bs
->commands
= bs
->commands
->next
;
3083 bs
->commands
= copy_command_lines (bs
->commands
);
3086 /* Print nothing for this entry if we dont stop or if we dont print. */
3087 if (bs
->stop
== 0 || bs
->print
== 0)
3088 bs
->print_it
= print_it_noop
;
3091 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
3093 if (loc
->address
== bp_addr
)
3095 bs
= bpstat_alloc (loc
, bs
);
3096 /* For hits of moribund locations, we should just proceed. */
3099 bs
->print_it
= print_it_noop
;
3103 bs
->next
= NULL
; /* Terminate the chain */
3104 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3106 /* If we aren't stopping, the value of some hardware watchpoint may
3107 not have changed, but the intermediate memory locations we are
3108 watching may have. Don't bother if we're stopping; this will get
3110 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3114 need_remove_insert
= 0;
3116 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3118 && bs
->breakpoint_at
->owner
3119 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3120 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3121 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3123 /* remove/insert can invalidate bs->breakpoint_at, if this
3124 location is no longer used by the watchpoint. Prevent
3125 further code from trying to use it. */
3126 bs
->breakpoint_at
= NULL
;
3127 need_remove_insert
= 1;
3130 if (need_remove_insert
)
3132 remove_breakpoints ();
3133 insert_breakpoints ();
3136 return root_bs
->next
;
3139 /* Tell what to do about this bpstat. */
3141 bpstat_what (bpstat bs
)
3143 /* Classify each bpstat as one of the following. */
3146 /* This bpstat element has no effect on the main_action. */
3149 /* There was a watchpoint, stop but don't print. */
3152 /* There was a watchpoint, stop and print. */
3155 /* There was a breakpoint but we're not stopping. */
3158 /* There was a breakpoint, stop but don't print. */
3161 /* There was a breakpoint, stop and print. */
3164 /* We hit the longjmp breakpoint. */
3167 /* We hit the longjmp_resume breakpoint. */
3170 /* We hit the step_resume breakpoint. */
3173 /* We hit the shared library event breakpoint. */
3176 /* This is just used to count how many enums there are. */
3180 /* Here is the table which drives this routine. So that we can
3181 format it pretty, we define some abbreviations for the
3182 enum bpstat_what codes. */
3183 #define kc BPSTAT_WHAT_KEEP_CHECKING
3184 #define ss BPSTAT_WHAT_STOP_SILENT
3185 #define sn BPSTAT_WHAT_STOP_NOISY
3186 #define sgl BPSTAT_WHAT_SINGLE
3187 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3188 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3189 #define sr BPSTAT_WHAT_STEP_RESUME
3190 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3192 /* "Can't happen." Might want to print an error message.
3193 abort() is not out of the question, but chances are GDB is just
3194 a bit confused, not unusable. */
3195 #define err BPSTAT_WHAT_STOP_NOISY
3197 /* Given an old action and a class, come up with a new action. */
3198 /* One interesting property of this table is that wp_silent is the same
3199 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3200 after stopping, the check for whether to step over a breakpoint
3201 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3202 reference to how we stopped. We retain separate wp_silent and
3203 bp_silent codes in case we want to change that someday.
3205 Another possibly interesting property of this table is that
3206 there's a partial ordering, priority-like, of the actions. Once
3207 you've decided that some action is appropriate, you'll never go
3208 back and decide something of a lower priority is better. The
3211 kc < clr sgl shl slr sn sr ss
3212 sgl < shl slr sn sr ss
3213 slr < err shl sn sr ss
3214 clr < err shl sn sr ss
3220 What I think this means is that we don't need a damned table
3221 here. If you just put the rows and columns in the right order,
3222 it'd look awfully regular. We could simply walk the bpstat list
3223 and choose the highest priority action we find, with a little
3224 logic to handle the 'err' cases. */
3226 /* step_resume entries: a step resume breakpoint overrides another
3227 breakpoint of signal handling (see comment in wait_for_inferior
3228 at where we set the step_resume breakpoint). */
3230 static const enum bpstat_what_main_action
3231 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3234 /* kc ss sn sgl slr clr sr shl
3237 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
},
3239 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3241 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3243 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
},
3245 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3247 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3249 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
},
3251 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
},
3253 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3255 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
}
3268 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3269 struct bpstat_what retval
;
3271 retval
.call_dummy
= 0;
3272 for (; bs
!= NULL
; bs
= bs
->next
)
3274 enum class bs_class
= no_effect
;
3275 if (bs
->breakpoint_at
== NULL
)
3276 /* I suspect this can happen if it was a momentary breakpoint
3277 which has since been deleted. */
3279 if (bs
->breakpoint_at
->owner
== NULL
)
3280 bs_class
= bp_nostop
;
3282 switch (bs
->breakpoint_at
->owner
->type
)
3288 case bp_hardware_breakpoint
:
3294 bs_class
= bp_noisy
;
3296 bs_class
= bp_silent
;
3299 bs_class
= bp_nostop
;
3302 case bp_hardware_watchpoint
:
3303 case bp_read_watchpoint
:
3304 case bp_access_watchpoint
:
3308 bs_class
= wp_noisy
;
3310 bs_class
= wp_silent
;
3313 /* There was a watchpoint, but we're not stopping.
3314 This requires no further action. */
3315 bs_class
= no_effect
;
3318 bs_class
= long_jump
;
3320 case bp_longjmp_resume
:
3321 bs_class
= long_resume
;
3323 case bp_step_resume
:
3326 bs_class
= step_resume
;
3329 /* It is for the wrong frame. */
3330 bs_class
= bp_nostop
;
3332 case bp_watchpoint_scope
:
3333 bs_class
= bp_nostop
;
3335 case bp_shlib_event
:
3336 bs_class
= shlib_event
;
3338 case bp_thread_event
:
3339 case bp_overlay_event
:
3340 bs_class
= bp_nostop
;
3346 bs_class
= bp_noisy
;
3348 bs_class
= bp_silent
;
3351 /* There was a catchpoint, but we're not stopping.
3352 This requires no further action. */
3353 bs_class
= no_effect
;
3356 /* Make sure the action is stop (silent or noisy),
3357 so infrun.c pops the dummy frame. */
3358 bs_class
= bp_silent
;
3359 retval
.call_dummy
= 1;
3362 /* Tracepoint hits should not be reported back to GDB, and
3363 if one got through somehow, it should have been filtered
3365 internal_error (__FILE__
, __LINE__
,
3366 _("bpstat_what: bp_tracepoint encountered"));
3369 current_action
= table
[(int) bs_class
][(int) current_action
];
3371 retval
.main_action
= current_action
;
3375 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3376 without hardware support). This isn't related to a specific bpstat,
3377 just to things like whether watchpoints are set. */
3380 bpstat_should_step (void)
3382 struct breakpoint
*b
;
3384 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
&& b
->loc
!= NULL
)
3391 static void print_breakpoint_location (struct breakpoint
*b
,
3392 struct bp_location
*loc
,
3394 struct ui_stream
*stb
)
3399 = find_pc_sect_function (loc
->address
, loc
->section
);
3402 ui_out_text (uiout
, "in ");
3403 ui_out_field_string (uiout
, "func",
3404 SYMBOL_PRINT_NAME (sym
));
3405 ui_out_wrap_hint (uiout
, wrap_indent
);
3406 ui_out_text (uiout
, " at ");
3408 ui_out_field_string (uiout
, "file", b
->source_file
);
3409 ui_out_text (uiout
, ":");
3411 if (ui_out_is_mi_like_p (uiout
))
3413 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3414 char *fullname
= symtab_to_fullname (sal
.symtab
);
3417 ui_out_field_string (uiout
, "fullname", fullname
);
3420 ui_out_field_int (uiout
, "line", b
->line_number
);
3424 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3428 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3429 ui_out_field_stream (uiout
, "at", stb
);
3433 /* Print B to gdb_stdout. */
3435 print_one_breakpoint_location (struct breakpoint
*b
,
3436 struct bp_location
*loc
,
3438 CORE_ADDR
*last_addr
)
3440 struct command_line
*l
;
3442 struct ep_type_description
3447 static struct ep_type_description bptypes
[] =
3449 {bp_none
, "?deleted?"},
3450 {bp_breakpoint
, "breakpoint"},
3451 {bp_hardware_breakpoint
, "hw breakpoint"},
3452 {bp_until
, "until"},
3453 {bp_finish
, "finish"},
3454 {bp_watchpoint
, "watchpoint"},
3455 {bp_hardware_watchpoint
, "hw watchpoint"},
3456 {bp_read_watchpoint
, "read watchpoint"},
3457 {bp_access_watchpoint
, "acc watchpoint"},
3458 {bp_longjmp
, "longjmp"},
3459 {bp_longjmp_resume
, "longjmp resume"},
3460 {bp_step_resume
, "step resume"},
3461 {bp_watchpoint_scope
, "watchpoint scope"},
3462 {bp_call_dummy
, "call dummy"},
3463 {bp_shlib_event
, "shlib events"},
3464 {bp_thread_event
, "thread events"},
3465 {bp_overlay_event
, "overlay events"},
3466 {bp_catchpoint
, "catchpoint"},
3467 {bp_tracepoint
, "tracepoint"},
3470 static char bpenables
[] = "nynny";
3471 char wrap_indent
[80];
3472 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3473 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3474 struct cleanup
*bkpt_chain
;
3476 int header_of_multiple
= 0;
3477 int part_of_multiple
= (loc
!= NULL
);
3478 struct value_print_options opts
;
3480 get_user_print_options (&opts
);
3482 gdb_assert (!loc
|| loc_number
!= 0);
3483 /* See comment in print_one_breakpoint concerning
3484 treatment of breakpoints with single disabled
3488 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3489 header_of_multiple
= 1;
3494 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3498 if (part_of_multiple
)
3501 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3502 ui_out_field_string (uiout
, "number", formatted
);
3507 ui_out_field_int (uiout
, "number", b
->number
);
3512 if (part_of_multiple
)
3513 ui_out_field_skip (uiout
, "type");
3516 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3517 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3518 internal_error (__FILE__
, __LINE__
,
3519 _("bptypes table does not describe type #%d."),
3521 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3526 if (part_of_multiple
)
3527 ui_out_field_skip (uiout
, "disp");
3529 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3534 if (part_of_multiple
)
3535 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3537 ui_out_field_fmt (uiout
, "enabled", "%c",
3538 bpenables
[(int) b
->enable_state
]);
3539 ui_out_spaces (uiout
, 2);
3543 strcpy (wrap_indent
, " ");
3544 if (opts
.addressprint
)
3546 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3547 strcat (wrap_indent
, " ");
3549 strcat (wrap_indent
, " ");
3552 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3554 /* Although the print_one can possibly print
3555 all locations, calling it here is not likely
3556 to get any nice result. So, make sure there's
3557 just one location. */
3558 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3559 b
->ops
->print_one (b
, last_addr
);
3565 internal_error (__FILE__
, __LINE__
,
3566 _("print_one_breakpoint: bp_none encountered\n"));
3570 case bp_hardware_watchpoint
:
3571 case bp_read_watchpoint
:
3572 case bp_access_watchpoint
:
3573 /* Field 4, the address, is omitted (which makes the columns
3574 not line up too nicely with the headers, but the effect
3575 is relatively readable). */
3576 if (opts
.addressprint
)
3577 ui_out_field_skip (uiout
, "addr");
3579 ui_out_field_string (uiout
, "what", b
->exp_string
);
3583 case bp_hardware_breakpoint
:
3587 case bp_longjmp_resume
:
3588 case bp_step_resume
:
3589 case bp_watchpoint_scope
:
3591 case bp_shlib_event
:
3592 case bp_thread_event
:
3593 case bp_overlay_event
:
3595 if (opts
.addressprint
)
3598 if (header_of_multiple
)
3599 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3600 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3601 ui_out_field_string (uiout
, "addr", "<PENDING>");
3603 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3606 if (!header_of_multiple
)
3607 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3609 *last_addr
= b
->loc
->address
;
3613 if (!part_of_multiple
&& b
->thread
!= -1)
3615 /* FIXME: This seems to be redundant and lost here; see the
3616 "stop only in" line a little further down. */
3617 ui_out_text (uiout
, " thread ");
3618 ui_out_field_int (uiout
, "thread", b
->thread
);
3621 ui_out_text (uiout
, "\n");
3623 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3626 ui_out_text (uiout
, "\tstop only in stack frame at ");
3627 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3629 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3630 ui_out_text (uiout
, "\n");
3633 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3635 /* We do not print the condition for Ada exception catchpoints
3636 because the condition is an internal implementation detail
3637 that we do not want to expose to the user. */
3639 if (b
->type
== bp_tracepoint
)
3640 ui_out_text (uiout
, "\ttrace only if ");
3642 ui_out_text (uiout
, "\tstop only if ");
3643 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3644 ui_out_text (uiout
, "\n");
3647 if (!part_of_multiple
&& b
->thread
!= -1)
3649 /* FIXME should make an annotation for this */
3650 ui_out_text (uiout
, "\tstop only in thread ");
3651 ui_out_field_int (uiout
, "thread", b
->thread
);
3652 ui_out_text (uiout
, "\n");
3655 if (!part_of_multiple
&& b
->hit_count
)
3657 /* FIXME should make an annotation for this */
3658 if (ep_is_catchpoint (b
))
3659 ui_out_text (uiout
, "\tcatchpoint");
3661 ui_out_text (uiout
, "\tbreakpoint");
3662 ui_out_text (uiout
, " already hit ");
3663 ui_out_field_int (uiout
, "times", b
->hit_count
);
3664 if (b
->hit_count
== 1)
3665 ui_out_text (uiout
, " time\n");
3667 ui_out_text (uiout
, " times\n");
3670 /* Output the count also if it is zero, but only if this is
3671 mi. FIXME: Should have a better test for this. */
3672 if (ui_out_is_mi_like_p (uiout
))
3673 if (!part_of_multiple
&& b
->hit_count
== 0)
3674 ui_out_field_int (uiout
, "times", b
->hit_count
);
3676 if (!part_of_multiple
&& b
->ignore_count
)
3679 ui_out_text (uiout
, "\tignore next ");
3680 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3681 ui_out_text (uiout
, " hits\n");
3684 if (!part_of_multiple
&& (l
= b
->commands
))
3686 struct cleanup
*script_chain
;
3689 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3690 print_command_lines (uiout
, l
, 4);
3691 do_cleanups (script_chain
);
3694 if (!part_of_multiple
&& b
->pass_count
)
3696 annotate_field (10);
3697 ui_out_text (uiout
, "\tpass count ");
3698 ui_out_field_int (uiout
, "pass", b
->pass_count
);
3699 ui_out_text (uiout
, " \n");
3702 if (!part_of_multiple
&& b
->step_count
)
3704 annotate_field (11);
3705 ui_out_text (uiout
, "\tstep count ");
3706 ui_out_field_int (uiout
, "step", b
->step_count
);
3707 ui_out_text (uiout
, " \n");
3710 if (!part_of_multiple
&& b
->actions
)
3712 struct action_line
*action
;
3713 annotate_field (12);
3714 for (action
= b
->actions
; action
; action
= action
->next
)
3716 ui_out_text (uiout
, " A\t");
3717 ui_out_text (uiout
, action
->action
);
3718 ui_out_text (uiout
, "\n");
3722 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3725 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3726 else if (b
->exp_string
)
3727 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3730 do_cleanups (bkpt_chain
);
3731 do_cleanups (old_chain
);
3735 print_one_breakpoint (struct breakpoint
*b
,
3736 CORE_ADDR
*last_addr
)
3738 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3740 /* If this breakpoint has custom print function,
3741 it's already printed. Otherwise, print individual
3742 locations, if any. */
3743 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3745 /* If breakpoint has a single location that is
3746 disabled, we print it as if it had
3747 several locations, since otherwise it's hard to
3748 represent "breakpoint enabled, location disabled"
3750 Note that while hardware watchpoints have
3751 several locations internally, that's no a property
3754 && !is_hardware_watchpoint (b
)
3755 && (b
->loc
->next
|| !b
->loc
->enabled
)
3756 && !ui_out_is_mi_like_p (uiout
))
3758 struct bp_location
*loc
;
3760 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3761 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3767 struct captured_breakpoint_query_args
3773 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3775 struct captured_breakpoint_query_args
*args
= data
;
3776 struct breakpoint
*b
;
3777 CORE_ADDR dummy_addr
= 0;
3780 if (args
->bnum
== b
->number
)
3782 print_one_breakpoint (b
, &dummy_addr
);
3790 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3792 struct captured_breakpoint_query_args args
;
3794 /* For the moment we don't trust print_one_breakpoint() to not throw
3796 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3797 error_message
, RETURN_MASK_ALL
) < 0)
3803 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3804 catchpoints, et.al.). */
3807 user_settable_breakpoint (const struct breakpoint
*b
)
3809 return (b
->type
== bp_breakpoint
3810 || b
->type
== bp_catchpoint
3811 || b
->type
== bp_hardware_breakpoint
3812 || b
->type
== bp_tracepoint
3813 || b
->type
== bp_watchpoint
3814 || b
->type
== bp_read_watchpoint
3815 || b
->type
== bp_access_watchpoint
3816 || b
->type
== bp_hardware_watchpoint
);
3819 /* Print information on user settable breakpoint (watchpoint, etc)
3820 number BNUM. If BNUM is -1 print all user settable breakpoints.
3821 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3824 breakpoint_1 (int bnum
, int allflag
)
3826 struct breakpoint
*b
;
3827 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3828 int nr_printable_breakpoints
;
3829 struct cleanup
*bkpttbl_chain
;
3830 struct value_print_options opts
;
3832 get_user_print_options (&opts
);
3834 /* Compute the number of rows in the table. */
3835 nr_printable_breakpoints
= 0;
3838 || bnum
== b
->number
)
3840 if (allflag
|| user_settable_breakpoint (b
))
3841 nr_printable_breakpoints
++;
3844 if (opts
.addressprint
)
3846 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3850 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3853 if (nr_printable_breakpoints
> 0)
3854 annotate_breakpoints_headers ();
3855 if (nr_printable_breakpoints
> 0)
3857 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3858 if (nr_printable_breakpoints
> 0)
3860 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3861 if (nr_printable_breakpoints
> 0)
3863 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3864 if (nr_printable_breakpoints
> 0)
3866 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3867 if (opts
.addressprint
)
3869 if (nr_printable_breakpoints
> 0)
3871 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3872 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3874 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3876 if (nr_printable_breakpoints
> 0)
3878 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3879 ui_out_table_body (uiout
);
3880 if (nr_printable_breakpoints
> 0)
3881 annotate_breakpoints_table ();
3885 || bnum
== b
->number
)
3887 /* We only print out user settable breakpoints unless the
3889 if (allflag
|| user_settable_breakpoint (b
))
3890 print_one_breakpoint (b
, &last_addr
);
3893 do_cleanups (bkpttbl_chain
);
3895 if (nr_printable_breakpoints
== 0)
3898 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3900 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3905 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3906 that a comparison of an unsigned with -1 is always false. */
3907 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3908 set_next_address (current_gdbarch
, last_addr
);
3911 /* FIXME? Should this be moved up so that it is only called when
3912 there have been breakpoints? */
3913 annotate_breakpoints_table_end ();
3917 breakpoints_info (char *bnum_exp
, int from_tty
)
3922 bnum
= parse_and_eval_long (bnum_exp
);
3924 breakpoint_1 (bnum
, 0);
3928 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3933 bnum
= parse_and_eval_long (bnum_exp
);
3935 breakpoint_1 (bnum
, 1);
3939 breakpoint_has_pc (struct breakpoint
*b
,
3940 CORE_ADDR pc
, struct obj_section
*section
)
3942 struct bp_location
*bl
= b
->loc
;
3943 for (; bl
; bl
= bl
->next
)
3945 if (bl
->address
== pc
3946 && (!overlay_debugging
|| bl
->section
== section
))
3952 /* Print a message describing any breakpoints set at PC. */
3955 describe_other_breakpoints (CORE_ADDR pc
, struct obj_section
*section
,
3959 struct breakpoint
*b
;
3962 others
+= breakpoint_has_pc (b
, pc
, section
);
3966 printf_filtered (_("Note: breakpoint "));
3967 else /* if (others == ???) */
3968 printf_filtered (_("Note: breakpoints "));
3970 if (breakpoint_has_pc (b
, pc
, section
))
3973 printf_filtered ("%d", b
->number
);
3974 if (b
->thread
== -1 && thread
!= -1)
3975 printf_filtered (" (all threads)");
3976 else if (b
->thread
!= -1)
3977 printf_filtered (" (thread %d)", b
->thread
);
3978 printf_filtered ("%s%s ",
3979 ((b
->enable_state
== bp_disabled
||
3980 b
->enable_state
== bp_call_disabled
)
3982 : b
->enable_state
== bp_permanent
3986 : ((others
== 1) ? " and" : ""));
3988 printf_filtered (_("also set at pc "));
3989 fputs_filtered (paddress (pc
), gdb_stdout
);
3990 printf_filtered (".\n");
3994 /* Set the default place to put a breakpoint
3995 for the `break' command with no arguments. */
3998 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
4001 default_breakpoint_valid
= valid
;
4002 default_breakpoint_address
= addr
;
4003 default_breakpoint_symtab
= symtab
;
4004 default_breakpoint_line
= line
;
4007 /* Return true iff it is meaningful to use the address member of
4008 BPT. For some breakpoint types, the address member is irrelevant
4009 and it makes no sense to attempt to compare it to other addresses
4010 (or use it for any other purpose either).
4012 More specifically, each of the following breakpoint types will always
4013 have a zero valued address and we don't want check_duplicates() to mark
4014 breakpoints of any of these types to be a duplicate of an actual
4015 breakpoint at address zero:
4018 bp_hardware_watchpoint
4020 bp_access_watchpoint
4024 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
4026 enum bptype type
= bpt
->type
;
4028 return (type
!= bp_watchpoint
4029 && type
!= bp_hardware_watchpoint
4030 && type
!= bp_read_watchpoint
4031 && type
!= bp_access_watchpoint
4032 && type
!= bp_catchpoint
);
4035 /* Rescan breakpoints at the same address and section as BPT,
4036 marking the first one as "first" and any others as "duplicates".
4037 This is so that the bpt instruction is only inserted once.
4038 If we have a permanent breakpoint at the same place as BPT, make
4039 that one the official one, and the rest as duplicates. */
4042 check_duplicates_for (CORE_ADDR address
, struct obj_section
*section
)
4044 struct bp_location
*b
;
4046 struct bp_location
*perm_bp
= 0;
4048 ALL_BP_LOCATIONS (b
)
4049 if (b
->owner
->enable_state
!= bp_disabled
4050 && b
->owner
->enable_state
!= bp_call_disabled
4052 && !b
->shlib_disabled
4053 && b
->address
== address
/* address / overlay match */
4054 && (!overlay_debugging
|| b
->section
== section
)
4055 && breakpoint_address_is_meaningful (b
->owner
))
4057 /* Have we found a permanent breakpoint? */
4058 if (b
->owner
->enable_state
== bp_permanent
)
4065 b
->duplicate
= count
> 1;
4068 /* If we found a permanent breakpoint at this address, go over the
4069 list again and declare all the other breakpoints there (except
4070 other permanent breakpoints) to be the duplicates. */
4073 perm_bp
->duplicate
= 0;
4075 /* Permanent breakpoint should always be inserted. */
4076 if (! perm_bp
->inserted
)
4077 internal_error (__FILE__
, __LINE__
,
4078 _("allegedly permanent breakpoint is not "
4079 "actually inserted"));
4081 ALL_BP_LOCATIONS (b
)
4084 if (b
->owner
->enable_state
!= bp_permanent
4085 && b
->owner
->enable_state
!= bp_disabled
4086 && b
->owner
->enable_state
!= bp_call_disabled
4087 && b
->enabled
&& !b
->shlib_disabled
4088 && b
->address
== address
/* address / overlay match */
4089 && (!overlay_debugging
|| b
->section
== section
)
4090 && breakpoint_address_is_meaningful (b
->owner
))
4093 internal_error (__FILE__
, __LINE__
,
4094 _("another breakpoint was inserted on top of "
4095 "a permanent breakpoint"));
4104 check_duplicates (struct breakpoint
*bpt
)
4106 struct bp_location
*bl
= bpt
->loc
;
4108 if (! breakpoint_address_is_meaningful (bpt
))
4111 for (; bl
; bl
= bl
->next
)
4112 check_duplicates_for (bl
->address
, bl
->section
);
4116 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4117 int bnum
, int have_bnum
)
4122 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4123 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4125 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4126 bnum
, astr1
, astr2
);
4128 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4131 /* Adjust a breakpoint's address to account for architectural constraints
4132 on breakpoint placement. Return the adjusted address. Note: Very
4133 few targets require this kind of adjustment. For most targets,
4134 this function is simply the identity function. */
4137 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4139 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4141 /* Very few targets need any kind of breakpoint adjustment. */
4144 else if (bptype
== bp_watchpoint
4145 || bptype
== bp_hardware_watchpoint
4146 || bptype
== bp_read_watchpoint
4147 || bptype
== bp_access_watchpoint
4148 || bptype
== bp_catchpoint
)
4150 /* Watchpoints and the various bp_catch_* eventpoints should not
4151 have their addresses modified. */
4156 CORE_ADDR adjusted_bpaddr
;
4158 /* Some targets have architectural constraints on the placement
4159 of breakpoint instructions. Obtain the adjusted address. */
4160 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4163 /* An adjusted breakpoint address can significantly alter
4164 a user's expectations. Print a warning if an adjustment
4166 if (adjusted_bpaddr
!= bpaddr
)
4167 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4169 return adjusted_bpaddr
;
4173 /* Allocate a struct bp_location. */
4175 static struct bp_location
*
4176 allocate_bp_location (struct breakpoint
*bpt
)
4178 struct bp_location
*loc
, *loc_p
;
4180 loc
= xmalloc (sizeof (struct bp_location
));
4181 memset (loc
, 0, sizeof (*loc
));
4185 loc
->shlib_disabled
= 0;
4195 case bp_longjmp_resume
:
4196 case bp_step_resume
:
4197 case bp_watchpoint_scope
:
4199 case bp_shlib_event
:
4200 case bp_thread_event
:
4201 case bp_overlay_event
:
4202 loc
->loc_type
= bp_loc_software_breakpoint
;
4204 case bp_hardware_breakpoint
:
4205 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4207 case bp_hardware_watchpoint
:
4208 case bp_read_watchpoint
:
4209 case bp_access_watchpoint
:
4210 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4214 loc
->loc_type
= bp_loc_other
;
4217 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4223 static void free_bp_location (struct bp_location
*loc
)
4228 if (loc
->function_name
)
4229 xfree (loc
->function_name
);
4234 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4235 that has type BPTYPE and has no locations as yet. */
4237 static struct breakpoint
*
4238 set_raw_breakpoint_without_location (enum bptype bptype
)
4240 struct breakpoint
*b
, *b1
;
4242 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4243 memset (b
, 0, sizeof (*b
));
4246 b
->language
= current_language
->la_language
;
4247 b
->input_radix
= input_radix
;
4249 b
->enable_state
= bp_enabled
;
4252 b
->ignore_count
= 0;
4254 b
->frame_id
= null_frame_id
;
4255 b
->forked_inferior_pid
= null_ptid
;
4256 b
->exec_pathname
= NULL
;
4258 b
->condition_not_parsed
= 0;
4260 /* Add this breakpoint to the end of the chain
4261 so that a list of breakpoints will come out in order
4262 of increasing numbers. */
4264 b1
= breakpoint_chain
;
4266 breakpoint_chain
= b
;
4276 /* Initialize loc->function_name. */
4278 set_breakpoint_location_function (struct bp_location
*loc
)
4280 if (loc
->owner
->type
== bp_breakpoint
4281 || loc
->owner
->type
== bp_hardware_breakpoint
4282 || loc
->owner
->type
== bp_tracepoint
)
4284 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4286 if (loc
->function_name
)
4287 loc
->function_name
= xstrdup (loc
->function_name
);
4291 /* set_raw_breakpoint is a low level routine for allocating and
4292 partially initializing a breakpoint of type BPTYPE. The newly
4293 created breakpoint's address, section, source file name, and line
4294 number are provided by SAL. The newly created and partially
4295 initialized breakpoint is added to the breakpoint chain and
4296 is also returned as the value of this function.
4298 It is expected that the caller will complete the initialization of
4299 the newly created breakpoint struct as well as output any status
4300 information regarding the creation of a new breakpoint. In
4301 particular, set_raw_breakpoint does NOT set the breakpoint
4302 number! Care should be taken to not allow an error to occur
4303 prior to completing the initialization of the breakpoint. If this
4304 should happen, a bogus breakpoint will be left on the chain. */
4307 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4309 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4310 CORE_ADDR adjusted_address
;
4312 /* Adjust the breakpoint's address prior to allocating a location.
4313 Once we call allocate_bp_location(), that mostly uninitialized
4314 location will be placed on the location chain. Adjustment of the
4315 breakpoint may cause target_read_memory() to be called and we do
4316 not want its scan of the location chain to find a breakpoint and
4317 location that's only been partially initialized. */
4318 adjusted_address
= adjust_breakpoint_address (sal
.pc
, b
->type
);
4320 b
->loc
= allocate_bp_location (b
);
4321 b
->loc
->requested_address
= sal
.pc
;
4322 b
->loc
->address
= adjusted_address
;
4324 if (sal
.symtab
== NULL
)
4325 b
->source_file
= NULL
;
4327 b
->source_file
= savestring (sal
.symtab
->filename
,
4328 strlen (sal
.symtab
->filename
));
4329 b
->loc
->section
= sal
.section
;
4330 b
->line_number
= sal
.line
;
4332 set_breakpoint_location_function (b
->loc
);
4334 breakpoints_changed ();
4340 /* Note that the breakpoint object B describes a permanent breakpoint
4341 instruction, hard-wired into the inferior's code. */
4343 make_breakpoint_permanent (struct breakpoint
*b
)
4345 struct bp_location
*bl
;
4346 b
->enable_state
= bp_permanent
;
4348 /* By definition, permanent breakpoints are already present in the code.
4349 Mark all locations as inserted. For now, make_breakpoint_permanent
4350 is called in just one place, so it's hard to say if it's reasonable
4351 to have permanent breakpoint with multiple locations or not,
4352 but it's easy to implmement. */
4353 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4357 static struct breakpoint
*
4358 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4360 static int internal_breakpoint_number
= -1;
4361 struct symtab_and_line sal
;
4362 struct breakpoint
*b
;
4364 init_sal (&sal
); /* initialize to zeroes */
4367 sal
.section
= find_pc_overlay (sal
.pc
);
4369 b
= set_raw_breakpoint (sal
, type
);
4370 b
->number
= internal_breakpoint_number
--;
4371 b
->disposition
= disp_donttouch
;
4378 create_longjmp_breakpoint (char *func_name
)
4380 struct minimal_symbol
*m
;
4382 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4384 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4385 update_global_location_list (1);
4388 /* Call this routine when stepping and nexting to enable a breakpoint
4389 if we do a longjmp(). When we hit that breakpoint, call
4390 set_longjmp_resume_breakpoint() to figure out where we are going. */
4393 set_longjmp_breakpoint (void)
4395 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4397 create_longjmp_breakpoint ("longjmp");
4398 create_longjmp_breakpoint ("_longjmp");
4399 create_longjmp_breakpoint ("siglongjmp");
4400 create_longjmp_breakpoint ("_siglongjmp");
4404 /* Delete all longjmp breakpoints from THREAD. */
4406 delete_longjmp_breakpoint (int thread
)
4408 struct breakpoint
*b
, *temp
;
4410 ALL_BREAKPOINTS_SAFE (b
, temp
)
4411 if (b
->type
== bp_longjmp
)
4413 if (b
->thread
== thread
)
4414 delete_breakpoint (b
);
4419 create_overlay_event_breakpoint_1 (char *func_name
, struct objfile
*objfile
)
4421 struct breakpoint
*b
;
4422 struct minimal_symbol
*m
;
4424 if ((m
= lookup_minimal_symbol_text (func_name
, objfile
)) == NULL
)
4427 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4429 b
->addr_string
= xstrdup (func_name
);
4431 if (overlay_debugging
== ovly_auto
)
4433 b
->enable_state
= bp_enabled
;
4434 overlay_events_enabled
= 1;
4438 b
->enable_state
= bp_disabled
;
4439 overlay_events_enabled
= 0;
4441 update_global_location_list (1);
4445 create_overlay_event_breakpoint (char *func_name
)
4447 struct objfile
*objfile
;
4448 ALL_OBJFILES (objfile
)
4449 create_overlay_event_breakpoint_1 (func_name
, objfile
);
4453 enable_overlay_breakpoints (void)
4455 struct breakpoint
*b
;
4458 if (b
->type
== bp_overlay_event
)
4460 b
->enable_state
= bp_enabled
;
4461 update_global_location_list (1);
4462 overlay_events_enabled
= 1;
4467 disable_overlay_breakpoints (void)
4469 struct breakpoint
*b
;
4472 if (b
->type
== bp_overlay_event
)
4474 b
->enable_state
= bp_disabled
;
4475 update_global_location_list (0);
4476 overlay_events_enabled
= 0;
4481 create_thread_event_breakpoint (CORE_ADDR address
)
4483 struct breakpoint
*b
;
4485 b
= create_internal_breakpoint (address
, bp_thread_event
);
4487 b
->enable_state
= bp_enabled
;
4488 /* addr_string has to be used or breakpoint_re_set will delete me. */
4489 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4491 update_global_location_list_nothrow (1);
4497 remove_thread_event_breakpoints (void)
4499 struct breakpoint
*b
, *temp
;
4501 ALL_BREAKPOINTS_SAFE (b
, temp
)
4502 if (b
->type
== bp_thread_event
)
4503 delete_breakpoint (b
);
4506 struct captured_parse_breakpoint_args
4509 struct symtabs_and_lines
*sals_p
;
4510 char ***addr_string_p
;
4514 struct lang_and_radix
4522 remove_solib_event_breakpoints (void)
4524 struct breakpoint
*b
, *temp
;
4526 ALL_BREAKPOINTS_SAFE (b
, temp
)
4527 if (b
->type
== bp_shlib_event
)
4528 delete_breakpoint (b
);
4532 create_solib_event_breakpoint (CORE_ADDR address
)
4534 struct breakpoint
*b
;
4536 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4537 update_global_location_list_nothrow (1);
4541 /* Disable any breakpoints that are on code in shared libraries. Only
4542 apply to enabled breakpoints, disabled ones can just stay disabled. */
4545 disable_breakpoints_in_shlibs (void)
4547 struct bp_location
*loc
;
4549 ALL_BP_LOCATIONS (loc
)
4551 struct breakpoint
*b
= loc
->owner
;
4552 /* We apply the check to all breakpoints, including disabled
4553 for those with loc->duplicate set. This is so that when breakpoint
4554 becomes enabled, or the duplicate is removed, gdb will try to insert
4555 all breakpoints. If we don't set shlib_disabled here, we'll try
4556 to insert those breakpoints and fail. */
4557 if (((b
->type
== bp_breakpoint
)
4558 || (b
->type
== bp_hardware_breakpoint
)
4559 || (b
->type
== bp_tracepoint
))
4560 && !loc
->shlib_disabled
4562 && PC_SOLIB (loc
->address
)
4564 && solib_name_from_address (loc
->address
)
4568 loc
->shlib_disabled
= 1;
4573 /* Disable any breakpoints that are in in an unloaded shared library. Only
4574 apply to enabled breakpoints, disabled ones can just stay disabled. */
4577 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4579 struct bp_location
*loc
;
4580 int disabled_shlib_breaks
= 0;
4582 /* SunOS a.out shared libraries are always mapped, so do not
4583 disable breakpoints; they will only be reported as unloaded
4584 through clear_solib when GDB discards its shared library
4585 list. See clear_solib for more information. */
4586 if (exec_bfd
!= NULL
4587 && bfd_get_flavour (exec_bfd
) == bfd_target_aout_flavour
)
4590 ALL_BP_LOCATIONS (loc
)
4592 struct breakpoint
*b
= loc
->owner
;
4593 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4594 || loc
->loc_type
== bp_loc_software_breakpoint
)
4595 && !loc
->shlib_disabled
4596 && (b
->type
== bp_breakpoint
|| b
->type
== bp_hardware_breakpoint
)
4597 && solib_contains_address_p (solib
, loc
->address
))
4599 loc
->shlib_disabled
= 1;
4600 /* At this point, we cannot rely on remove_breakpoint
4601 succeeding so we must mark the breakpoint as not inserted
4602 to prevent future errors occurring in remove_breakpoints. */
4604 if (!disabled_shlib_breaks
)
4606 target_terminal_ours_for_output ();
4607 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4610 disabled_shlib_breaks
= 1;
4615 /* FORK & VFORK catchpoints. */
4617 /* Implement the "insert" breakpoint_ops method for fork catchpoints. */
4620 insert_catch_fork (struct breakpoint
*b
)
4622 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
4625 /* Implement the "remove" breakpoint_ops method for fork catchpoints. */
4628 remove_catch_fork (struct breakpoint
*b
)
4630 return target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
4633 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
4637 breakpoint_hit_catch_fork (struct breakpoint
*b
)
4639 return inferior_has_forked (inferior_ptid
, &b
->forked_inferior_pid
);
4642 /* Implement the "print_it" breakpoint_ops method for fork catchpoints. */
4644 static enum print_stop_action
4645 print_it_catch_fork (struct breakpoint
*b
)
4647 annotate_catchpoint (b
->number
);
4648 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
4649 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4650 return PRINT_SRC_AND_LOC
;
4653 /* Implement the "print_one" breakpoint_ops method for fork catchpoints. */
4656 print_one_catch_fork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4658 struct value_print_options opts
;
4660 get_user_print_options (&opts
);
4662 /* Field 4, the address, is omitted (which makes the columns
4663 not line up too nicely with the headers, but the effect
4664 is relatively readable). */
4665 if (opts
.addressprint
)
4666 ui_out_field_skip (uiout
, "addr");
4668 ui_out_text (uiout
, "fork");
4669 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4671 ui_out_text (uiout
, ", process ");
4672 ui_out_field_int (uiout
, "what",
4673 ptid_get_pid (b
->forked_inferior_pid
));
4674 ui_out_spaces (uiout
, 1);
4678 /* Implement the "print_mention" breakpoint_ops method for fork
4682 print_mention_catch_fork (struct breakpoint
*b
)
4684 printf_filtered (_("Catchpoint %d (fork)"), b
->number
);
4687 /* The breakpoint_ops structure to be used in fork catchpoints. */
4689 static struct breakpoint_ops catch_fork_breakpoint_ops
=
4693 breakpoint_hit_catch_fork
,
4694 print_it_catch_fork
,
4695 print_one_catch_fork
,
4696 print_mention_catch_fork
4699 /* Implement the "insert" breakpoint_ops method for vfork catchpoints. */
4702 insert_catch_vfork (struct breakpoint
*b
)
4704 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
4707 /* Implement the "remove" breakpoint_ops method for vfork catchpoints. */
4710 remove_catch_vfork (struct breakpoint
*b
)
4712 return target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
4715 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
4719 breakpoint_hit_catch_vfork (struct breakpoint
*b
)
4721 return inferior_has_vforked (inferior_ptid
, &b
->forked_inferior_pid
);
4724 /* Implement the "print_it" breakpoint_ops method for vfork catchpoints. */
4726 static enum print_stop_action
4727 print_it_catch_vfork (struct breakpoint
*b
)
4729 annotate_catchpoint (b
->number
);
4730 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
4731 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4732 return PRINT_SRC_AND_LOC
;
4735 /* Implement the "print_one" breakpoint_ops method for vfork catchpoints. */
4738 print_one_catch_vfork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4740 struct value_print_options opts
;
4742 get_user_print_options (&opts
);
4743 /* Field 4, the address, is omitted (which makes the columns
4744 not line up too nicely with the headers, but the effect
4745 is relatively readable). */
4746 if (opts
.addressprint
)
4747 ui_out_field_skip (uiout
, "addr");
4749 ui_out_text (uiout
, "vfork");
4750 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4752 ui_out_text (uiout
, ", process ");
4753 ui_out_field_int (uiout
, "what",
4754 ptid_get_pid (b
->forked_inferior_pid
));
4755 ui_out_spaces (uiout
, 1);
4759 /* Implement the "print_mention" breakpoint_ops method for vfork
4763 print_mention_catch_vfork (struct breakpoint
*b
)
4765 printf_filtered (_("Catchpoint %d (vfork)"), b
->number
);
4768 /* The breakpoint_ops structure to be used in vfork catchpoints. */
4770 static struct breakpoint_ops catch_vfork_breakpoint_ops
=
4774 breakpoint_hit_catch_vfork
,
4775 print_it_catch_vfork
,
4776 print_one_catch_vfork
,
4777 print_mention_catch_vfork
4780 /* Create a new breakpoint of the bp_catchpoint kind and return it.
4782 If TEMPFLAG is non-zero, then make the breakpoint temporary.
4783 If COND_STRING is not NULL, then store it in the breakpoint.
4784 OPS, if not NULL, is the breakpoint_ops structure associated
4785 to the catchpoint. */
4787 static struct breakpoint
*
4788 create_catchpoint (int tempflag
, char *cond_string
,
4789 struct breakpoint_ops
*ops
)
4791 struct symtab_and_line sal
;
4792 struct breakpoint
*b
;
4799 b
= set_raw_breakpoint (sal
, bp_catchpoint
);
4800 set_breakpoint_count (breakpoint_count
+ 1);
4801 b
->number
= breakpoint_count
;
4803 b
->cond_string
= (cond_string
== NULL
) ?
4804 NULL
: savestring (cond_string
, strlen (cond_string
));
4806 b
->addr_string
= NULL
;
4807 b
->enable_state
= bp_enabled
;
4808 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4812 update_global_location_list (1);
4818 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4819 struct breakpoint_ops
*ops
)
4821 struct breakpoint
*b
= create_catchpoint (tempflag
, cond_string
, ops
);
4823 /* FIXME: We should put this information in a breakpoint private data
4825 b
->forked_inferior_pid
= null_ptid
;
4828 /* Exec catchpoints. */
4831 insert_catch_exec (struct breakpoint
*b
)
4833 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
4837 remove_catch_exec (struct breakpoint
*b
)
4839 return target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
4843 breakpoint_hit_catch_exec (struct breakpoint
*b
)
4845 return inferior_has_execd (inferior_ptid
, &b
->exec_pathname
);
4848 static enum print_stop_action
4849 print_it_catch_exec (struct breakpoint
*b
)
4851 annotate_catchpoint (b
->number
);
4852 printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b
->number
,
4854 return PRINT_SRC_AND_LOC
;
4858 print_one_catch_exec (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4860 struct value_print_options opts
;
4862 get_user_print_options (&opts
);
4864 /* Field 4, the address, is omitted (which makes the columns
4865 not line up too nicely with the headers, but the effect
4866 is relatively readable). */
4867 if (opts
.addressprint
)
4868 ui_out_field_skip (uiout
, "addr");
4870 ui_out_text (uiout
, "exec");
4871 if (b
->exec_pathname
!= NULL
)
4873 ui_out_text (uiout
, ", program \"");
4874 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
4875 ui_out_text (uiout
, "\" ");
4880 print_mention_catch_exec (struct breakpoint
*b
)
4882 printf_filtered (_("Catchpoint %d (exec)"), b
->number
);
4885 static struct breakpoint_ops catch_exec_breakpoint_ops
=
4889 breakpoint_hit_catch_exec
,
4890 print_it_catch_exec
,
4891 print_one_catch_exec
,
4892 print_mention_catch_exec
4896 hw_breakpoint_used_count (void)
4898 struct breakpoint
*b
;
4903 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
4911 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4913 struct breakpoint
*b
;
4916 *other_type_used
= 0;
4919 if (breakpoint_enabled (b
))
4921 if (b
->type
== type
)
4923 else if ((b
->type
== bp_hardware_watchpoint
||
4924 b
->type
== bp_read_watchpoint
||
4925 b
->type
== bp_access_watchpoint
))
4926 *other_type_used
= 1;
4933 disable_watchpoints_before_interactive_call_start (void)
4935 struct breakpoint
*b
;
4939 if (((b
->type
== bp_watchpoint
)
4940 || (b
->type
== bp_hardware_watchpoint
)
4941 || (b
->type
== bp_read_watchpoint
)
4942 || (b
->type
== bp_access_watchpoint
))
4943 && breakpoint_enabled (b
))
4945 b
->enable_state
= bp_call_disabled
;
4946 update_global_location_list (0);
4952 enable_watchpoints_after_interactive_call_stop (void)
4954 struct breakpoint
*b
;
4958 if (((b
->type
== bp_watchpoint
)
4959 || (b
->type
== bp_hardware_watchpoint
)
4960 || (b
->type
== bp_read_watchpoint
)
4961 || (b
->type
== bp_access_watchpoint
))
4962 && (b
->enable_state
== bp_call_disabled
))
4964 b
->enable_state
= bp_enabled
;
4965 update_global_location_list (1);
4971 /* Set a breakpoint that will evaporate an end of command
4972 at address specified by SAL.
4973 Restrict it to frame FRAME if FRAME is nonzero. */
4976 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4979 struct breakpoint
*b
;
4980 b
= set_raw_breakpoint (sal
, type
);
4981 b
->enable_state
= bp_enabled
;
4982 b
->disposition
= disp_donttouch
;
4983 b
->frame_id
= frame_id
;
4985 /* If we're debugging a multi-threaded program, then we
4986 want momentary breakpoints to be active in only a
4987 single thread of control. */
4988 if (in_thread_list (inferior_ptid
))
4989 b
->thread
= pid_to_thread_id (inferior_ptid
);
4991 update_global_location_list_nothrow (1);
4997 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
4999 struct symtab_and_line sal
;
5001 sal
= find_pc_line (pc
, 0);
5003 sal
.section
= find_pc_overlay (pc
);
5004 sal
.explicit_pc
= 1;
5006 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
5010 /* Tell the user we have just set a breakpoint B. */
5013 mention (struct breakpoint
*b
)
5016 struct cleanup
*ui_out_chain
;
5017 struct value_print_options opts
;
5019 get_user_print_options (&opts
);
5021 /* FIXME: This is misplaced; mention() is called by things (like
5022 hitting a watchpoint) other than breakpoint creation. It should
5023 be possible to clean this up and at the same time replace the
5024 random calls to breakpoint_changed with this hook. */
5025 observer_notify_breakpoint_created (b
->number
);
5027 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
5028 b
->ops
->print_mention (b
);
5033 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
5036 ui_out_text (uiout
, "Watchpoint ");
5037 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
5038 ui_out_field_int (uiout
, "number", b
->number
);
5039 ui_out_text (uiout
, ": ");
5040 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5041 do_cleanups (ui_out_chain
);
5043 case bp_hardware_watchpoint
:
5044 ui_out_text (uiout
, "Hardware watchpoint ");
5045 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
5046 ui_out_field_int (uiout
, "number", b
->number
);
5047 ui_out_text (uiout
, ": ");
5048 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5049 do_cleanups (ui_out_chain
);
5051 case bp_read_watchpoint
:
5052 ui_out_text (uiout
, "Hardware read watchpoint ");
5053 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
5054 ui_out_field_int (uiout
, "number", b
->number
);
5055 ui_out_text (uiout
, ": ");
5056 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5057 do_cleanups (ui_out_chain
);
5059 case bp_access_watchpoint
:
5060 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
5061 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
5062 ui_out_field_int (uiout
, "number", b
->number
);
5063 ui_out_text (uiout
, ": ");
5064 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5065 do_cleanups (ui_out_chain
);
5068 if (ui_out_is_mi_like_p (uiout
))
5073 if (b
->disposition
== disp_del
)
5074 printf_filtered (_("Temporary breakpoint"));
5076 printf_filtered (_("Breakpoint"));
5077 printf_filtered (_(" %d"), b
->number
);
5080 case bp_hardware_breakpoint
:
5081 if (ui_out_is_mi_like_p (uiout
))
5086 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
5090 if (ui_out_is_mi_like_p (uiout
))
5095 printf_filtered (_("Tracepoint"));
5096 printf_filtered (_(" %d"), b
->number
);
5103 case bp_longjmp_resume
:
5104 case bp_step_resume
:
5106 case bp_watchpoint_scope
:
5107 case bp_shlib_event
:
5108 case bp_thread_event
:
5109 case bp_overlay_event
:
5115 /* i18n: cagney/2005-02-11: Below needs to be merged into a
5119 printf_filtered (_(" (%s) pending."), b
->addr_string
);
5123 if (opts
.addressprint
|| b
->source_file
== NULL
)
5125 printf_filtered (" at ");
5126 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5129 printf_filtered (": file %s, line %d.",
5130 b
->source_file
, b
->line_number
);
5134 struct bp_location
*loc
= b
->loc
;
5136 for (; loc
; loc
= loc
->next
)
5138 printf_filtered (" (%d locations)", n
);
5143 if (ui_out_is_mi_like_p (uiout
))
5145 printf_filtered ("\n");
5149 static struct bp_location
*
5150 add_location_to_breakpoint (struct breakpoint
*b
,
5151 const struct symtab_and_line
*sal
)
5153 struct bp_location
*loc
, **tmp
;
5155 loc
= allocate_bp_location (b
);
5156 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5159 loc
->requested_address
= sal
->pc
;
5160 loc
->address
= adjust_breakpoint_address (loc
->requested_address
, b
->type
);
5161 loc
->section
= sal
->section
;
5163 set_breakpoint_location_function (loc
);
5168 /* Return 1 if LOC is pointing to a permanent breakpoint,
5169 return 0 otherwise. */
5172 bp_loc_is_permanent (struct bp_location
*loc
)
5176 const gdb_byte
*brk
;
5177 gdb_byte
*target_mem
;
5178 struct cleanup
*cleanup
;
5181 gdb_assert (loc
!= NULL
);
5183 addr
= loc
->address
;
5184 brk
= gdbarch_breakpoint_from_pc (current_gdbarch
, &addr
, &len
);
5186 /* Software breakpoints unsupported? */
5190 target_mem
= alloca (len
);
5192 /* Enable the automatic memory restoration from breakpoints while
5193 we read the memory. Otherwise we could say about our temporary
5194 breakpoints they are permanent. */
5195 cleanup
= make_show_memory_breakpoints_cleanup (0);
5197 if (target_read_memory (loc
->address
, target_mem
, len
) == 0
5198 && memcmp (target_mem
, brk
, len
) == 0)
5201 do_cleanups (cleanup
);
5208 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5209 as textual description of the location, and COND_STRING
5210 as condition expression. */
5213 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5215 enum bptype type
, enum bpdisp disposition
,
5216 int thread
, int ignore_count
,
5217 struct breakpoint_ops
*ops
, int from_tty
, int enabled
)
5219 struct breakpoint
*b
= NULL
;
5222 if (type
== bp_hardware_breakpoint
)
5224 int i
= hw_breakpoint_used_count ();
5225 int target_resources_ok
=
5226 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
5228 if (target_resources_ok
== 0)
5229 error (_("No hardware breakpoint support in the target."));
5230 else if (target_resources_ok
< 0)
5231 error (_("Hardware breakpoints used exceeds limit."));
5234 for (i
= 0; i
< sals
.nelts
; ++i
)
5236 struct symtab_and_line sal
= sals
.sals
[i
];
5237 struct bp_location
*loc
;
5240 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5244 b
= set_raw_breakpoint (sal
, type
);
5245 set_breakpoint_count (breakpoint_count
+ 1);
5246 b
->number
= breakpoint_count
;
5249 b
->cond_string
= cond_string
;
5250 b
->ignore_count
= ignore_count
;
5251 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5252 b
->disposition
= disposition
;
5258 loc
= add_location_to_breakpoint (b
, &sal
);
5261 if (bp_loc_is_permanent (loc
))
5262 make_breakpoint_permanent (b
);
5266 char *arg
= b
->cond_string
;
5267 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5269 error (_("Garbage %s follows condition"), arg
);
5274 b
->addr_string
= addr_string
;
5276 /* addr_string has to be used or breakpoint_re_set will delete
5278 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5284 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5285 elements to fill the void space. */
5287 remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5289 int i
= index_to_remove
+1;
5290 int last_index
= sal
->nelts
-1;
5292 for (;i
<= last_index
; ++i
)
5293 sal
->sals
[i
-1] = sal
->sals
[i
];
5298 /* If appropriate, obtains all sals that correspond
5299 to the same file and line as SAL. This is done
5300 only if SAL does not have explicit PC and has
5301 line and file information. If we got just a single
5302 expanded sal, return the original.
5304 Otherwise, if SAL.explicit_line is not set, filter out
5305 all sals for which the name of enclosing function
5306 is different from SAL. This makes sure that if we have
5307 breakpoint originally set in template instantiation, say
5308 foo<int>(), we won't expand SAL to locations at the same
5309 line in all existing instantiations of 'foo'.
5312 static struct symtabs_and_lines
5313 expand_line_sal_maybe (struct symtab_and_line sal
)
5315 struct symtabs_and_lines expanded
;
5316 CORE_ADDR original_pc
= sal
.pc
;
5317 char *original_function
= NULL
;
5321 /* If we have explicit pc, don't expand.
5322 If we have no line number, we can't expand. */
5323 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5326 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5327 expanded
.sals
[0] = sal
;
5332 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5334 expanded
= expand_line_sal (sal
);
5335 if (expanded
.nelts
== 1)
5337 /* We had one sal, we got one sal. Without futher
5338 processing, just return the original sal. */
5339 xfree (expanded
.sals
);
5341 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5342 sal
.pc
= original_pc
;
5343 expanded
.sals
[0] = sal
;
5347 if (!sal
.explicit_line
)
5349 CORE_ADDR func_addr
, func_end
;
5350 for (i
= 0; i
< expanded
.nelts
; ++i
)
5352 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5353 char *this_function
;
5354 if (find_pc_partial_function (pc
, &this_function
,
5355 &func_addr
, &func_end
))
5357 if (this_function
&&
5358 strcmp (this_function
, original_function
) != 0)
5360 remove_sal (&expanded
, i
);
5363 else if (func_addr
== pc
)
5365 /* We're at beginning of a function, and should
5367 struct symbol
*sym
= find_pc_function (pc
);
5369 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5372 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5379 if (expanded
.nelts
<= 1)
5381 /* This is un ugly workaround. If we get zero
5382 expanded sals then something is really wrong.
5383 Fix that by returnign the original sal. */
5384 xfree (expanded
.sals
);
5386 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5387 sal
.pc
= original_pc
;
5388 expanded
.sals
[0] = sal
;
5395 for (i
= 0; i
< expanded
.nelts
; ++i
)
5396 if (expanded
.sals
[i
].pc
== original_pc
)
5407 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5408 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5409 value. COND_STRING, if not NULL, specified the condition to be
5410 used for all breakpoints. Essentially the only case where
5411 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5412 function. In that case, it's still not possible to specify
5413 separate conditions for different overloaded functions, so
5414 we take just a single condition string.
5416 NOTE: If the function succeeds, the caller is expected to cleanup
5417 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5418 array contents). If the function fails (error() is called), the
5419 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5420 COND and SALS arrays and each of those arrays contents. */
5423 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5425 enum bptype type
, enum bpdisp disposition
,
5426 int thread
, int ignore_count
,
5427 struct breakpoint_ops
*ops
, int from_tty
,
5431 for (i
= 0; i
< sals
.nelts
; ++i
)
5433 struct symtabs_and_lines expanded
=
5434 expand_line_sal_maybe (sals
.sals
[i
]);
5436 create_breakpoint (expanded
, addr_string
[i
],
5437 cond_string
, type
, disposition
,
5438 thread
, ignore_count
, ops
, from_tty
, enabled
);
5441 update_global_location_list (1);
5444 /* Parse ARG which is assumed to be a SAL specification possibly
5445 followed by conditionals. On return, SALS contains an array of SAL
5446 addresses found. ADDR_STRING contains a vector of (canonical)
5447 address strings. ARG points to the end of the SAL. */
5450 parse_breakpoint_sals (char **address
,
5451 struct symtabs_and_lines
*sals
,
5452 char ***addr_string
,
5455 char *addr_start
= *address
;
5456 *addr_string
= NULL
;
5457 /* If no arg given, or if first arg is 'if ', use the default
5459 if ((*address
) == NULL
5460 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5462 if (default_breakpoint_valid
)
5464 struct symtab_and_line sal
;
5465 init_sal (&sal
); /* initialize to zeroes */
5466 sals
->sals
= (struct symtab_and_line
*)
5467 xmalloc (sizeof (struct symtab_and_line
));
5468 sal
.pc
= default_breakpoint_address
;
5469 sal
.line
= default_breakpoint_line
;
5470 sal
.symtab
= default_breakpoint_symtab
;
5471 sal
.section
= find_pc_overlay (sal
.pc
);
5472 sals
->sals
[0] = sal
;
5476 error (_("No default breakpoint address now."));
5480 /* Force almost all breakpoints to be in terms of the
5481 current_source_symtab (which is decode_line_1's default). This
5482 should produce the results we want almost all of the time while
5483 leaving default_breakpoint_* alone.
5484 ObjC: However, don't match an Objective-C method name which
5485 may have a '+' or '-' succeeded by a '[' */
5487 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5489 if (default_breakpoint_valid
5491 || ((strchr ("+-", (*address
)[0]) != NULL
)
5492 && ((*address
)[1] != '['))))
5493 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5494 default_breakpoint_line
, addr_string
,
5497 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5498 addr_string
, not_found_ptr
);
5500 /* For any SAL that didn't have a canonical string, fill one in. */
5501 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5502 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5503 if (addr_start
!= (*address
))
5506 for (i
= 0; i
< sals
->nelts
; i
++)
5508 /* Add the string if not present. */
5509 if ((*addr_string
)[i
] == NULL
)
5510 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5516 /* Convert each SAL into a real PC. Verify that the PC can be
5517 inserted as a breakpoint. If it can't throw an error. */
5520 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5524 for (i
= 0; i
< sals
->nelts
; i
++)
5525 resolve_sal_pc (&sals
->sals
[i
]);
5529 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5531 struct captured_parse_breakpoint_args
*args
= data
;
5533 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5534 args
->not_found_ptr
);
5537 /* Given TOK, a string specification of condition and thread, as
5538 accepted by the 'break' command, extract the condition
5539 string and thread number and set *COND_STRING and *THREAD.
5540 PC identifies the context at which the condition should be parsed.
5541 If no condition is found, *COND_STRING is set to NULL.
5542 If no thread is found, *THREAD is set to -1. */
5544 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5545 char **cond_string
, int *thread
)
5547 *cond_string
= NULL
;
5553 char *cond_start
= NULL
;
5554 char *cond_end
= NULL
;
5555 while (*tok
== ' ' || *tok
== '\t')
5560 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5563 toklen
= end_tok
- tok
;
5565 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5567 struct expression
*expr
;
5569 tok
= cond_start
= end_tok
+ 1;
5570 expr
= parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5573 *cond_string
= savestring (cond_start
,
5574 cond_end
- cond_start
);
5576 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5582 *thread
= strtol (tok
, &tok
, 0);
5584 error (_("Junk after thread keyword."));
5585 if (!valid_thread_id (*thread
))
5586 error (_("Unknown thread %d."), *thread
);
5589 error (_("Junk at end of arguments."));
5593 /* Set a breakpoint. This function is shared between
5594 CLI and MI functions for setting a breakpoint.
5595 This function has two major modes of operations,
5596 selected by the PARSE_CONDITION_AND_THREAD parameter.
5597 If non-zero, the function will parse arg, extracting
5598 breakpoint location, address and thread. Otherwise,
5599 ARG is just the location of breakpoint, with condition
5600 and thread specified by the COND_STRING and THREAD
5604 break_command_really (char *arg
, char *cond_string
, int thread
,
5605 int parse_condition_and_thread
,
5606 int tempflag
, int hardwareflag
, int traceflag
,
5608 enum auto_boolean pending_break_support
,
5609 struct breakpoint_ops
*ops
,
5613 struct gdb_exception e
;
5614 struct symtabs_and_lines sals
;
5615 struct symtab_and_line pending_sal
;
5618 char *addr_start
= arg
;
5620 struct cleanup
*old_chain
;
5621 struct cleanup
*breakpoint_chain
= NULL
;
5622 struct captured_parse_breakpoint_args parse_args
;
5626 enum bptype type_wanted
;
5632 parse_args
.arg_p
= &arg
;
5633 parse_args
.sals_p
= &sals
;
5634 parse_args
.addr_string_p
= &addr_string
;
5635 parse_args
.not_found_ptr
= ¬_found
;
5637 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5638 &parse_args
, RETURN_MASK_ALL
);
5640 /* If caller is interested in rc value from parse, set value. */
5644 throw_exception (e
);
5648 case NOT_FOUND_ERROR
:
5650 /* If pending breakpoint support is turned off, throw
5653 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5654 throw_exception (e
);
5656 exception_print (gdb_stderr
, e
);
5658 /* If pending breakpoint support is auto query and the user
5659 selects no, then simply return the error code. */
5660 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5661 !nquery ("Make breakpoint pending on future shared library load? "))
5664 /* At this point, either the user was queried about setting
5665 a pending breakpoint and selected yes, or pending
5666 breakpoint behavior is on and thus a pending breakpoint
5667 is defaulted on behalf of the user. */
5668 copy_arg
= xstrdup (addr_start
);
5669 addr_string
= ©_arg
;
5671 sals
.sals
= &pending_sal
;
5676 throw_exception (e
);
5683 /* Create a chain of things that always need to be cleaned up. */
5684 old_chain
= make_cleanup (null_cleanup
, 0);
5688 /* Make sure that all storage allocated to SALS gets freed. */
5689 make_cleanup (xfree
, sals
.sals
);
5691 /* Cleanup the addr_string array but not its contents. */
5692 make_cleanup (xfree
, addr_string
);
5695 /* ----------------------------- SNIP -----------------------------
5696 Anything added to the cleanup chain beyond this point is assumed
5697 to be part of a breakpoint. If the breakpoint create succeeds
5698 then the memory is not reclaimed. */
5699 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5701 /* Mark the contents of the addr_string for cleanup. These go on
5702 the breakpoint_chain and only occure if the breakpoint create
5704 for (i
= 0; i
< sals
.nelts
; i
++)
5706 if (addr_string
[i
] != NULL
)
5707 make_cleanup (xfree
, addr_string
[i
]);
5710 /* Resolve all line numbers to PC's and verify that the addresses
5711 are ok for the target. */
5713 breakpoint_sals_to_pc (&sals
, addr_start
);
5715 type_wanted
= (traceflag
5717 : (hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
));
5719 /* Verify that condition can be parsed, before setting any
5720 breakpoints. Allocate a separate condition expression for each
5724 if (parse_condition_and_thread
)
5726 /* Here we only parse 'arg' to separate condition
5727 from thread number, so parsing in context of first
5728 sal is OK. When setting the breakpoint we'll
5729 re-parse it in context of each sal. */
5732 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
, &thread
);
5734 make_cleanup (xfree
, cond_string
);
5738 /* Create a private copy of condition string. */
5741 cond_string
= xstrdup (cond_string
);
5742 make_cleanup (xfree
, cond_string
);
5745 create_breakpoints (sals
, addr_string
, cond_string
, type_wanted
,
5746 tempflag
? disp_del
: disp_donttouch
,
5747 thread
, ignore_count
, ops
, from_tty
, enabled
);
5751 struct symtab_and_line sal
= {0};
5752 struct breakpoint
*b
;
5754 make_cleanup (xfree
, copy_arg
);
5756 b
= set_raw_breakpoint_without_location (type_wanted
);
5757 set_breakpoint_count (breakpoint_count
+ 1);
5758 b
->number
= breakpoint_count
;
5760 b
->addr_string
= addr_string
[0];
5761 b
->cond_string
= NULL
;
5762 b
->ignore_count
= ignore_count
;
5763 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5764 b
->condition_not_parsed
= 1;
5766 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5768 update_global_location_list (1);
5773 warning (_("Multiple breakpoints were set.\n"
5774 "Use the \"delete\" command to delete unwanted breakpoints."));
5775 /* That's it. Discard the cleanups for data inserted into the
5777 discard_cleanups (breakpoint_chain
);
5778 /* But cleanup everything else. */
5779 do_cleanups (old_chain
);
5782 /* Set a breakpoint.
5783 ARG is a string describing breakpoint address,
5784 condition, and thread.
5785 FLAG specifies if a breakpoint is hardware on,
5786 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5790 break_command_1 (char *arg
, int flag
, int from_tty
)
5792 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5793 int tempflag
= flag
& BP_TEMPFLAG
;
5795 break_command_really (arg
,
5796 NULL
, 0, 1 /* parse arg */,
5797 tempflag
, hardwareflag
, 0 /* traceflag */,
5798 0 /* Ignore count */,
5799 pending_break_support
,
5800 NULL
/* breakpoint_ops */,
5807 set_breakpoint (char *address
, char *condition
,
5808 int hardwareflag
, int tempflag
,
5809 int thread
, int ignore_count
,
5810 int pending
, int enabled
)
5812 break_command_really (address
, condition
, thread
,
5813 0 /* condition and thread are valid. */,
5814 tempflag
, hardwareflag
, 0 /* traceflag */,
5817 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5821 /* Adjust SAL to the first instruction past the function prologue.
5822 The end of the prologue is determined using the line table from
5823 the debugging information.
5825 If SAL is already past the prologue, then do nothing. */
5828 skip_prologue_sal (struct symtab_and_line
*sal
)
5830 struct symbol
*sym
= find_pc_function (sal
->pc
);
5831 struct symtab_and_line start_sal
;
5836 start_sal
= find_function_start_sal (sym
, 1);
5837 if (sal
->pc
< start_sal
.pc
)
5841 /* Helper function for break_command_1 and disassemble_command. */
5844 resolve_sal_pc (struct symtab_and_line
*sal
)
5848 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5850 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5851 error (_("No line %d in file \"%s\"."),
5852 sal
->line
, sal
->symtab
->filename
);
5855 /* If this SAL corresponds to a breakpoint inserted using
5856 a line number, then skip the function prologue if necessary. */
5857 if (sal
->explicit_line
)
5859 /* Preserve the original line number. */
5860 int saved_line
= sal
->line
;
5861 skip_prologue_sal (sal
);
5862 sal
->line
= saved_line
;
5866 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5868 struct blockvector
*bv
;
5872 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5875 sym
= block_linkage_function (b
);
5878 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5879 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
5883 /* It really is worthwhile to have the section, so we'll just
5884 have to look harder. This case can be executed if we have
5885 line numbers but no functions (as can happen in assembly
5888 struct minimal_symbol
*msym
;
5890 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5892 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
5899 break_command (char *arg
, int from_tty
)
5901 break_command_1 (arg
, 0, from_tty
);
5905 tbreak_command (char *arg
, int from_tty
)
5907 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5911 hbreak_command (char *arg
, int from_tty
)
5913 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5917 thbreak_command (char *arg
, int from_tty
)
5919 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5923 stop_command (char *arg
, int from_tty
)
5925 printf_filtered (_("Specify the type of breakpoint to set.\n\
5926 Usage: stop in <function | address>\n\
5927 stop at <line>\n"));
5931 stopin_command (char *arg
, int from_tty
)
5935 if (arg
== (char *) NULL
)
5937 else if (*arg
!= '*')
5942 /* look for a ':'. If this is a line number specification, then
5943 say it is bad, otherwise, it should be an address or
5944 function/method name */
5945 while (*argptr
&& !hasColon
)
5947 hasColon
= (*argptr
== ':');
5952 badInput
= (*argptr
!= ':'); /* Not a class::method */
5954 badInput
= isdigit (*arg
); /* a simple line number */
5958 printf_filtered (_("Usage: stop in <function | address>\n"));
5960 break_command_1 (arg
, 0, from_tty
);
5964 stopat_command (char *arg
, int from_tty
)
5968 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5975 /* look for a ':'. If there is a '::' then get out, otherwise
5976 it is probably a line number. */
5977 while (*argptr
&& !hasColon
)
5979 hasColon
= (*argptr
== ':');
5984 badInput
= (*argptr
== ':'); /* we have class::method */
5986 badInput
= !isdigit (*arg
); /* not a line number */
5990 printf_filtered (_("Usage: stop at <line>\n"));
5992 break_command_1 (arg
, 0, from_tty
);
5995 /* accessflag: hw_write: watch write,
5996 hw_read: watch read,
5997 hw_access: watch access (read or write) */
5999 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
6001 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
6002 struct symtab_and_line sal
;
6003 struct expression
*exp
;
6004 struct block
*exp_valid_block
;
6005 struct value
*val
, *mark
;
6006 struct frame_info
*frame
;
6007 struct frame_info
*prev_frame
= NULL
;
6008 char *exp_start
= NULL
;
6009 char *exp_end
= NULL
;
6010 char *tok
, *id_tok_start
, *end_tok
;
6012 char *cond_start
= NULL
;
6013 char *cond_end
= NULL
;
6014 struct expression
*cond
= NULL
;
6015 int i
, other_type_used
, target_resources_ok
= 0;
6016 enum bptype bp_type
;
6020 init_sal (&sal
); /* initialize to zeroes */
6022 /* Make sure that we actually have parameters to parse. */
6023 if (arg
!= NULL
&& arg
[0] != '\0')
6025 toklen
= strlen (arg
); /* Size of argument list. */
6027 /* Points tok to the end of the argument list. */
6028 tok
= arg
+ toklen
- 1;
6030 /* Go backwards in the parameters list. Skip the last parameter.
6031 If we're expecting a 'thread <thread_num>' parameter, this should
6032 be the thread identifier. */
6033 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
6035 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
6038 /* Points end_tok to the beginning of the last token. */
6039 id_tok_start
= tok
+ 1;
6041 /* Go backwards in the parameters list. Skip one more parameter.
6042 If we're expecting a 'thread <thread_num>' parameter, we should
6043 reach a "thread" token. */
6044 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
6049 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
6052 /* Move the pointer forward to skip the whitespace and
6053 calculate the length of the token. */
6055 toklen
= end_tok
- tok
;
6057 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
6059 /* At this point we've found a "thread" token, which means
6060 the user is trying to set a watchpoint that triggers
6061 only in a specific thread. */
6064 /* Extract the thread ID from the next token. */
6065 thread
= strtol (id_tok_start
, &endp
, 0);
6067 /* Check if the user provided a valid numeric value for the
6069 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
6070 error (_("Invalid thread ID specification %s."), id_tok_start
);
6072 /* Check if the thread actually exists. */
6073 if (!valid_thread_id (thread
))
6074 error (_("Unknown thread %d."), thread
);
6076 /* Truncate the string and get rid of the thread <thread_num>
6077 parameter before the parameter list is parsed by the
6078 evaluate_expression() function. */
6083 /* Parse the rest of the arguments. */
6084 innermost_block
= NULL
;
6086 exp
= parse_exp_1 (&arg
, 0, 0);
6088 /* Remove trailing whitespace from the expression before saving it.
6089 This makes the eventual display of the expression string a bit
6091 while (exp_end
> exp_start
&& (exp_end
[-1] == ' ' || exp_end
[-1] == '\t'))
6094 exp_valid_block
= innermost_block
;
6095 mark
= value_mark ();
6096 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
6098 release_value (val
);
6101 while (*tok
== ' ' || *tok
== '\t')
6105 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
6108 toklen
= end_tok
- tok
;
6109 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
6111 tok
= cond_start
= end_tok
+ 1;
6112 cond
= parse_exp_1 (&tok
, 0, 0);
6116 error (_("Junk at end of command."));
6118 if (accessflag
== hw_read
)
6119 bp_type
= bp_read_watchpoint
;
6120 else if (accessflag
== hw_access
)
6121 bp_type
= bp_access_watchpoint
;
6123 bp_type
= bp_hardware_watchpoint
;
6125 mem_cnt
= can_use_hardware_watchpoint (val
);
6126 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
6127 error (_("Expression cannot be implemented with read/access watchpoint."));
6130 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
6131 target_resources_ok
=
6132 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
6134 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
6135 error (_("Target does not support this type of hardware watchpoint."));
6137 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
6138 error (_("Target can only support one kind of HW watchpoint at a time."));
6141 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
6142 watchpoint could not be set. */
6143 if (!mem_cnt
|| target_resources_ok
<= 0)
6144 bp_type
= bp_watchpoint
;
6146 frame
= block_innermost_frame (exp_valid_block
);
6148 prev_frame
= get_prev_frame (frame
);
6152 /* If the expression is "local", then set up a "watchpoint scope"
6153 breakpoint at the point where we've left the scope of the watchpoint
6154 expression. Create the scope breakpoint before the watchpoint, so
6155 that we will encounter it first in bpstat_stop_status. */
6156 if (innermost_block
&& prev_frame
)
6158 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
6159 bp_watchpoint_scope
);
6161 scope_breakpoint
->enable_state
= bp_enabled
;
6163 /* Automatically delete the breakpoint when it hits. */
6164 scope_breakpoint
->disposition
= disp_del
;
6166 /* Only break in the proper frame (help with recursion). */
6167 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
6169 /* Set the address at which we will stop. */
6170 scope_breakpoint
->loc
->requested_address
6171 = get_frame_pc (prev_frame
);
6172 scope_breakpoint
->loc
->address
6173 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
6174 scope_breakpoint
->type
);
6177 /* Now set up the breakpoint. */
6178 b
= set_raw_breakpoint (sal
, bp_type
);
6179 set_breakpoint_count (breakpoint_count
+ 1);
6180 b
->number
= breakpoint_count
;
6182 b
->disposition
= disp_donttouch
;
6184 b
->exp_valid_block
= exp_valid_block
;
6185 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6188 b
->loc
->cond
= cond
;
6190 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6195 b
->watchpoint_frame
= get_frame_id (frame
);
6197 b
->watchpoint_frame
= null_frame_id
;
6199 if (scope_breakpoint
!= NULL
)
6201 /* The scope breakpoint is related to the watchpoint. We will
6202 need to act on them together. */
6203 b
->related_breakpoint
= scope_breakpoint
;
6204 scope_breakpoint
->related_breakpoint
= b
;
6207 value_free_to_mark (mark
);
6209 update_global_location_list (1);
6212 /* Return count of locations need to be watched and can be handled
6213 in hardware. If the watchpoint can not be handled
6214 in hardware return zero. */
6217 can_use_hardware_watchpoint (struct value
*v
)
6219 int found_memory_cnt
= 0;
6220 struct value
*head
= v
;
6222 /* Did the user specifically forbid us to use hardware watchpoints? */
6223 if (!can_use_hw_watchpoints
)
6226 /* Make sure that the value of the expression depends only upon
6227 memory contents, and values computed from them within GDB. If we
6228 find any register references or function calls, we can't use a
6229 hardware watchpoint.
6231 The idea here is that evaluating an expression generates a series
6232 of values, one holding the value of every subexpression. (The
6233 expression a*b+c has five subexpressions: a, b, a*b, c, and
6234 a*b+c.) GDB's values hold almost enough information to establish
6235 the criteria given above --- they identify memory lvalues,
6236 register lvalues, computed values, etcetera. So we can evaluate
6237 the expression, and then scan the chain of values that leaves
6238 behind to decide whether we can detect any possible change to the
6239 expression's final value using only hardware watchpoints.
6241 However, I don't think that the values returned by inferior
6242 function calls are special in any way. So this function may not
6243 notice that an expression involving an inferior function call
6244 can't be watched with hardware watchpoints. FIXME. */
6245 for (; v
; v
= value_next (v
))
6247 if (VALUE_LVAL (v
) == lval_memory
)
6250 /* A lazy memory lvalue is one that GDB never needed to fetch;
6251 we either just used its address (e.g., `a' in `a.b') or
6252 we never needed it at all (e.g., `a' in `a,b'). */
6256 /* Ahh, memory we actually used! Check if we can cover
6257 it with hardware watchpoints. */
6258 struct type
*vtype
= check_typedef (value_type (v
));
6260 /* We only watch structs and arrays if user asked for it
6261 explicitly, never if they just happen to appear in a
6262 middle of some value chain. */
6264 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6265 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6267 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
6268 int len
= TYPE_LENGTH (value_type (v
));
6270 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6277 else if (VALUE_LVAL (v
) != not_lval
6278 && deprecated_value_modifiable (v
) == 0)
6279 return 0; /* ??? What does this represent? */
6280 else if (VALUE_LVAL (v
) == lval_register
)
6281 return 0; /* cannot watch a register with a HW watchpoint */
6284 /* The expression itself looks suitable for using a hardware
6285 watchpoint, but give the target machine a chance to reject it. */
6286 return found_memory_cnt
;
6290 watch_command_wrapper (char *arg
, int from_tty
)
6292 watch_command (arg
, from_tty
);
6296 watch_command (char *arg
, int from_tty
)
6298 watch_command_1 (arg
, hw_write
, from_tty
);
6302 rwatch_command_wrapper (char *arg
, int from_tty
)
6304 rwatch_command (arg
, from_tty
);
6308 rwatch_command (char *arg
, int from_tty
)
6310 watch_command_1 (arg
, hw_read
, from_tty
);
6314 awatch_command_wrapper (char *arg
, int from_tty
)
6316 awatch_command (arg
, from_tty
);
6320 awatch_command (char *arg
, int from_tty
)
6322 watch_command_1 (arg
, hw_access
, from_tty
);
6326 /* Helper routines for the until_command routine in infcmd.c. Here
6327 because it uses the mechanisms of breakpoints. */
6329 struct until_break_command_continuation_args
6331 struct breakpoint
*breakpoint
;
6332 struct breakpoint
*breakpoint2
;
6335 /* This function is called by fetch_inferior_event via the
6336 cmd_continuation pointer, to complete the until command. It takes
6337 care of cleaning up the temporary breakpoints set up by the until
6340 until_break_command_continuation (void *arg
)
6342 struct until_break_command_continuation_args
*a
= arg
;
6344 delete_breakpoint (a
->breakpoint
);
6346 delete_breakpoint (a
->breakpoint2
);
6350 until_break_command (char *arg
, int from_tty
, int anywhere
)
6352 struct symtabs_and_lines sals
;
6353 struct symtab_and_line sal
;
6354 struct frame_info
*frame
= get_selected_frame (NULL
);
6355 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6356 struct breakpoint
*breakpoint
;
6357 struct breakpoint
*breakpoint2
= NULL
;
6358 struct cleanup
*old_chain
;
6360 clear_proceed_status ();
6362 /* Set a breakpoint where the user wants it and at return from
6365 if (default_breakpoint_valid
)
6366 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6367 default_breakpoint_line
, (char ***) NULL
, NULL
);
6369 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6370 0, (char ***) NULL
, NULL
);
6372 if (sals
.nelts
!= 1)
6373 error (_("Couldn't get information on specified line."));
6376 xfree (sals
.sals
); /* malloc'd, so freed */
6379 error (_("Junk at end of arguments."));
6381 resolve_sal_pc (&sal
);
6384 /* If the user told us to continue until a specified location,
6385 we don't specify a frame at which we need to stop. */
6386 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6388 /* Otherwise, specify the current frame, because we want to stop only
6389 at the very same frame. */
6390 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6393 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6395 /* Keep within the current frame, or in frames called by the current
6399 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6400 sal
.pc
= get_frame_pc (prev_frame
);
6401 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6403 make_cleanup_delete_breakpoint (breakpoint2
);
6406 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6408 /* If we are running asynchronously, and proceed call above has actually
6409 managed to start the target, arrange for breakpoints to be
6410 deleted when the target stops. Otherwise, we're already stopped and
6411 delete breakpoints via cleanup chain. */
6413 if (target_can_async_p () && is_running (inferior_ptid
))
6415 struct until_break_command_continuation_args
*args
;
6416 args
= xmalloc (sizeof (*args
));
6418 args
->breakpoint
= breakpoint
;
6419 args
->breakpoint2
= breakpoint2
;
6421 discard_cleanups (old_chain
);
6422 add_continuation (inferior_thread (),
6423 until_break_command_continuation
, args
,
6427 do_cleanups (old_chain
);
6431 ep_skip_leading_whitespace (char **s
)
6433 if ((s
== NULL
) || (*s
== NULL
))
6435 while (isspace (**s
))
6439 /* This function attempts to parse an optional "if <cond>" clause
6440 from the arg string. If one is not found, it returns NULL.
6442 Else, it returns a pointer to the condition string. (It does not
6443 attempt to evaluate the string against a particular block.) And,
6444 it updates arg to point to the first character following the parsed
6445 if clause in the arg string. */
6448 ep_parse_optional_if_clause (char **arg
)
6452 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6455 /* Skip the "if" keyword. */
6458 /* Skip any extra leading whitespace, and record the start of the
6459 condition string. */
6460 ep_skip_leading_whitespace (arg
);
6463 /* Assume that the condition occupies the remainder of the arg string. */
6464 (*arg
) += strlen (cond_string
);
6469 /* This function attempts to parse an optional filename from the arg
6470 string. If one is not found, it returns NULL.
6472 Else, it returns a pointer to the parsed filename. (This function
6473 makes no attempt to verify that a file of that name exists, or is
6474 accessible.) And, it updates arg to point to the first character
6475 following the parsed filename in the arg string.
6477 Note that clients needing to preserve the returned filename for
6478 future access should copy it to their own buffers. */
6480 ep_parse_optional_filename (char **arg
)
6482 static char filename
[1024];
6487 if ((*arg_p
== '\0') || isspace (*arg_p
))
6505 /* Commands to deal with catching events, such as signals, exceptions,
6506 process start/exit, etc. */
6510 catch_fork_temporary
, catch_vfork_temporary
,
6511 catch_fork_permanent
, catch_vfork_permanent
6516 catch_fork_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6518 char *cond_string
= NULL
;
6519 catch_fork_kind fork_kind
;
6522 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
6523 tempflag
= (fork_kind
== catch_fork_temporary
6524 || fork_kind
== catch_vfork_temporary
);
6528 ep_skip_leading_whitespace (&arg
);
6530 /* The allowed syntax is:
6532 catch [v]fork if <cond>
6534 First, check if there's an if clause. */
6535 cond_string
= ep_parse_optional_if_clause (&arg
);
6537 if ((*arg
!= '\0') && !isspace (*arg
))
6538 error (_("Junk at end of arguments."));
6540 /* If this target supports it, create a fork or vfork catchpoint
6541 and enable reporting of such events. */
6544 case catch_fork_temporary
:
6545 case catch_fork_permanent
:
6546 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6547 &catch_fork_breakpoint_ops
);
6549 case catch_vfork_temporary
:
6550 case catch_vfork_permanent
:
6551 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6552 &catch_vfork_breakpoint_ops
);
6555 error (_("unsupported or unknown fork kind; cannot catch it"));
6561 catch_exec_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6564 char *cond_string
= NULL
;
6566 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6570 ep_skip_leading_whitespace (&arg
);
6572 /* The allowed syntax is:
6574 catch exec if <cond>
6576 First, check if there's an if clause. */
6577 cond_string
= ep_parse_optional_if_clause (&arg
);
6579 if ((*arg
!= '\0') && !isspace (*arg
))
6580 error (_("Junk at end of arguments."));
6582 /* If this target supports it, create an exec catchpoint
6583 and enable reporting of such events. */
6584 create_catchpoint (tempflag
, cond_string
, &catch_exec_breakpoint_ops
);
6587 static enum print_stop_action
6588 print_exception_catchpoint (struct breakpoint
*b
)
6590 int bp_temp
, bp_throw
;
6592 annotate_catchpoint (b
->number
);
6594 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6595 if (b
->loc
->address
!= b
->loc
->requested_address
)
6596 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6599 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6601 bp_temp
? "Temporary catchpoint "
6603 if (!ui_out_is_mi_like_p (uiout
))
6604 ui_out_field_int (uiout
, "bkptno", b
->number
);
6606 bp_throw
? " (exception thrown), "
6607 : " (exception caught), ");
6608 if (ui_out_is_mi_like_p (uiout
))
6610 ui_out_field_string (uiout
, "reason",
6611 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6612 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6613 ui_out_field_int (uiout
, "bkptno", b
->number
);
6615 return PRINT_SRC_AND_LOC
;
6619 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6621 struct value_print_options opts
;
6622 get_user_print_options (&opts
);
6623 if (opts
.addressprint
)
6626 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6627 ui_out_field_string (uiout
, "addr", "<PENDING>");
6629 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6633 *last_addr
= b
->loc
->address
;
6634 if (strstr (b
->addr_string
, "throw") != NULL
)
6635 ui_out_field_string (uiout
, "what", "exception throw");
6637 ui_out_field_string (uiout
, "what", "exception catch");
6641 print_mention_exception_catchpoint (struct breakpoint
*b
)
6646 bp_temp
= b
->loc
->owner
->disposition
== disp_del
;
6647 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6648 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6649 : _("Catchpoint "));
6650 ui_out_field_int (uiout
, "bkptno", b
->number
);
6651 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6655 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6658 NULL
, /* breakpoint_hit */
6659 print_exception_catchpoint
,
6660 print_one_exception_catchpoint
,
6661 print_mention_exception_catchpoint
6665 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6666 enum exception_event_kind ex_event
, int from_tty
)
6668 char *trigger_func_name
;
6670 if (ex_event
== EX_EVENT_CATCH
)
6671 trigger_func_name
= "__cxa_begin_catch";
6673 trigger_func_name
= "__cxa_throw";
6675 break_command_really (trigger_func_name
, cond_string
, -1,
6676 0 /* condition and thread are valid. */,
6679 AUTO_BOOLEAN_TRUE
/* pending */,
6680 &gnu_v3_exception_catchpoint_ops
, from_tty
,
6686 /* Deal with "catch catch" and "catch throw" commands */
6689 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6690 int tempflag
, int from_tty
)
6692 char *cond_string
= NULL
;
6693 struct symtab_and_line
*sal
= NULL
;
6697 ep_skip_leading_whitespace (&arg
);
6699 cond_string
= ep_parse_optional_if_clause (&arg
);
6701 if ((*arg
!= '\0') && !isspace (*arg
))
6702 error (_("Junk at end of arguments."));
6704 if ((ex_event
!= EX_EVENT_THROW
) &&
6705 (ex_event
!= EX_EVENT_CATCH
))
6706 error (_("Unsupported or unknown exception event; cannot catch it"));
6708 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6711 warning (_("Unsupported with this platform/compiler combination."));
6714 /* Implementation of "catch catch" command. */
6717 catch_catch_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6719 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6720 catch_exception_command_1 (EX_EVENT_CATCH
, arg
, tempflag
, from_tty
);
6723 /* Implementation of "catch throw" command. */
6726 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6728 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6729 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
6732 /* Create a breakpoint struct for Ada exception catchpoints. */
6735 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6739 struct expression
*cond
,
6740 struct breakpoint_ops
*ops
,
6744 struct breakpoint
*b
;
6748 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6749 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6750 version for exception catchpoints, because two catchpoints
6751 used for different exception names will use the same address.
6752 In this case, a "breakpoint ... also set at..." warning is
6753 unproductive. Besides. the warning phrasing is also a bit
6754 inapropriate, we should use the word catchpoint, and tell
6755 the user what type of catchpoint it is. The above is good
6756 enough for now, though. */
6759 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6760 set_breakpoint_count (breakpoint_count
+ 1);
6762 b
->enable_state
= bp_enabled
;
6763 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6764 b
->number
= breakpoint_count
;
6765 b
->ignore_count
= 0;
6766 b
->loc
->cond
= cond
;
6767 b
->addr_string
= addr_string
;
6768 b
->language
= language_ada
;
6769 b
->cond_string
= cond_string
;
6770 b
->exp_string
= exp_string
;
6775 update_global_location_list (1);
6778 /* Implement the "catch exception" command. */
6781 catch_ada_exception_command (char *arg
, int from_tty
,
6782 struct cmd_list_element
*command
)
6785 struct symtab_and_line sal
;
6787 char *addr_string
= NULL
;
6788 char *exp_string
= NULL
;
6789 char *cond_string
= NULL
;
6790 struct expression
*cond
= NULL
;
6791 struct breakpoint_ops
*ops
= NULL
;
6793 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6797 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6798 &cond_string
, &cond
, &ops
);
6799 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6800 cond_string
, cond
, ops
, tempflag
,
6804 /* Implement the "catch assert" command. */
6807 catch_assert_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6810 struct symtab_and_line sal
;
6811 char *addr_string
= NULL
;
6812 struct breakpoint_ops
*ops
= NULL
;
6814 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6818 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6819 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6820 tempflag
, from_tty
);
6824 catch_command (char *arg
, int from_tty
)
6826 error (_("Catch requires an event name."));
6831 tcatch_command (char *arg
, int from_tty
)
6833 error (_("Catch requires an event name."));
6836 /* Delete breakpoints by address or line. */
6839 clear_command (char *arg
, int from_tty
)
6841 struct breakpoint
*b
;
6842 VEC(breakpoint_p
) *found
= 0;
6845 struct symtabs_and_lines sals
;
6846 struct symtab_and_line sal
;
6851 sals
= decode_line_spec (arg
, 1);
6856 sals
.sals
= (struct symtab_and_line
*)
6857 xmalloc (sizeof (struct symtab_and_line
));
6858 make_cleanup (xfree
, sals
.sals
);
6859 init_sal (&sal
); /* initialize to zeroes */
6860 sal
.line
= default_breakpoint_line
;
6861 sal
.symtab
= default_breakpoint_symtab
;
6862 sal
.pc
= default_breakpoint_address
;
6863 if (sal
.symtab
== 0)
6864 error (_("No source file specified."));
6872 /* We don't call resolve_sal_pc here. That's not
6873 as bad as it seems, because all existing breakpoints
6874 typically have both file/line and pc set. So, if
6875 clear is given file/line, we can match this to existing
6876 breakpoint without obtaining pc at all.
6878 We only support clearing given the address explicitly
6879 present in breakpoint table. Say, we've set breakpoint
6880 at file:line. There were several PC values for that file:line,
6881 due to optimization, all in one block.
6882 We've picked one PC value. If "clear" is issued with another
6883 PC corresponding to the same file:line, the breakpoint won't
6884 be cleared. We probably can still clear the breakpoint, but
6885 since the other PC value is never presented to user, user
6886 can only find it by guessing, and it does not seem important
6889 /* For each line spec given, delete bps which correspond
6890 to it. Do it in two passes, solely to preserve the current
6891 behavior that from_tty is forced true if we delete more than
6895 for (i
= 0; i
< sals
.nelts
; i
++)
6897 /* If exact pc given, clear bpts at that pc.
6898 If line given (pc == 0), clear all bpts on specified line.
6899 If defaulting, clear all bpts on default line
6902 defaulting sal.pc != 0 tests to do
6907 1 0 <can't happen> */
6911 /* Find all matching breakpoints and add them to
6916 /* Are we going to delete b? */
6917 if (b
->type
!= bp_none
6918 && b
->type
!= bp_watchpoint
6919 && b
->type
!= bp_hardware_watchpoint
6920 && b
->type
!= bp_read_watchpoint
6921 && b
->type
!= bp_access_watchpoint
)
6923 struct bp_location
*loc
= b
->loc
;
6924 for (; loc
; loc
= loc
->next
)
6926 int pc_match
= sal
.pc
6927 && (loc
->address
== sal
.pc
)
6928 && (!section_is_overlay (loc
->section
)
6929 || loc
->section
== sal
.section
);
6930 int line_match
= ((default_match
|| (0 == sal
.pc
))
6931 && b
->source_file
!= NULL
6932 && sal
.symtab
!= NULL
6933 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6934 && b
->line_number
== sal
.line
);
6935 if (pc_match
|| line_match
)
6944 VEC_safe_push(breakpoint_p
, found
, b
);
6947 /* Now go thru the 'found' chain and delete them. */
6948 if (VEC_empty(breakpoint_p
, found
))
6951 error (_("No breakpoint at %s."), arg
);
6953 error (_("No breakpoint at this line."));
6956 if (VEC_length(breakpoint_p
, found
) > 1)
6957 from_tty
= 1; /* Always report if deleted more than one */
6960 if (VEC_length(breakpoint_p
, found
) == 1)
6961 printf_unfiltered (_("Deleted breakpoint "));
6963 printf_unfiltered (_("Deleted breakpoints "));
6965 breakpoints_changed ();
6967 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
6970 printf_unfiltered ("%d ", b
->number
);
6971 delete_breakpoint (b
);
6974 putchar_unfiltered ('\n');
6977 /* Delete breakpoint in BS if they are `delete' breakpoints and
6978 all breakpoints that are marked for deletion, whether hit or not.
6979 This is called after any breakpoint is hit, or after errors. */
6982 breakpoint_auto_delete (bpstat bs
)
6984 struct breakpoint
*b
, *temp
;
6986 for (; bs
; bs
= bs
->next
)
6987 if (bs
->breakpoint_at
6988 && bs
->breakpoint_at
->owner
6989 && bs
->breakpoint_at
->owner
->disposition
== disp_del
6991 delete_breakpoint (bs
->breakpoint_at
->owner
);
6993 ALL_BREAKPOINTS_SAFE (b
, temp
)
6995 if (b
->disposition
== disp_del_at_next_stop
)
6996 delete_breakpoint (b
);
7000 /* A cleanup function which destroys a vector. */
7003 do_vec_free (void *p
)
7005 VEC(bp_location_p
) **vec
= p
;
7007 VEC_free (bp_location_p
, *vec
);
7010 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
7011 into the inferior, only remove already-inserted locations that no
7012 longer should be inserted. Functions that delete a breakpoint or
7013 breakpoints should pass false, so that deleting a breakpoint
7014 doesn't have the side effect of inserting the locations of other
7015 breakpoints that are marked not-inserted, but should_be_inserted
7016 returns true on them.
7018 This behaviour is useful is situations close to tear-down -- e.g.,
7019 after an exec, while the target still has execution, but breakpoint
7020 shadows of the previous executable image should *NOT* be restored
7021 to the new image; or before detaching, where the target still has
7022 execution and wants to delete breakpoints from GDB's lists, and all
7023 breakpoints had already been removed from the inferior. */
7026 update_global_location_list (int should_insert
)
7028 struct breakpoint
*b
;
7029 struct bp_location
**next
= &bp_location_chain
;
7030 struct bp_location
*loc
;
7031 struct bp_location
*loc2
;
7032 VEC(bp_location_p
) *old_locations
= NULL
;
7035 struct cleanup
*cleanups
;
7037 cleanups
= make_cleanup (do_vec_free
, &old_locations
);
7038 /* Store old locations for future reference. */
7039 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
7040 VEC_safe_push (bp_location_p
, old_locations
, loc
);
7042 bp_location_chain
= NULL
;
7045 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
7048 next
= &(loc
->global_next
);
7053 /* Identify bp_location instances that are no longer present in the new
7054 list, and therefore should be freed. Note that it's not necessary that
7055 those locations should be removed from inferior -- if there's another
7056 location at the same address (previously marked as duplicate),
7057 we don't need to remove/insert the location. */
7058 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
7060 /* Tells if 'loc' is found amoung the new locations. If not, we
7062 int found_object
= 0;
7063 /* Tells if the location should remain inserted in the target. */
7064 int keep_in_target
= 0;
7066 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7073 /* If this location is no longer present, and inserted, look if there's
7074 maybe a new location at the same address. If so, mark that one
7075 inserted, and don't remove this one. This is needed so that we
7076 don't have a time window where a breakpoint at certain location is not
7081 /* If the location is inserted now, we might have to remove it. */
7083 if (found_object
&& should_be_inserted (loc
))
7085 /* The location is still present in the location list, and still
7086 should be inserted. Don't do anything. */
7091 /* The location is either no longer present, or got disabled.
7092 See if there's another location at the same address, in which
7093 case we don't need to remove this one from the target. */
7094 if (breakpoint_address_is_meaningful (loc
->owner
))
7095 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7097 /* For the sake of should_insert_location. The
7098 call to check_duplicates will fix up this later. */
7099 loc2
->duplicate
= 0;
7100 if (should_be_inserted (loc2
)
7101 && loc2
!= loc
&& loc2
->address
== loc
->address
)
7104 loc2
->target_info
= loc
->target_info
;
7111 if (!keep_in_target
)
7113 if (remove_breakpoint (loc
, mark_uninserted
))
7115 /* This is just about all we can do. We could keep this
7116 location on the global list, and try to remove it next
7117 time, but there's no particular reason why we will
7120 Note that at this point, loc->owner is still valid,
7121 as delete_breakpoint frees the breakpoint only
7122 after calling us. */
7123 printf_filtered (_("warning: Error removing breakpoint %d\n"),
7124 loc
->owner
->number
);
7132 if (removed
&& non_stop
)
7134 /* This location was removed from the targets. In non-stop mode,
7135 a race condition is possible where we've removed a breakpoint,
7136 but stop events for that breakpoint are already queued and will
7137 arrive later. To suppress spurious SIGTRAPs reported to user,
7138 we keep this breakpoint location for a bit, and will retire it
7139 after we see 3 * thread_count events.
7140 The theory here is that reporting of events should,
7141 "on the average", be fair, so after that many event we'll see
7142 events from all threads that have anything of interest, and no
7143 longer need to keep this breakpoint. This is just a
7144 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7145 which is usability issue, but not a correctness problem. */
7146 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7149 VEC_safe_push (bp_location_p
, moribund_locations
, loc
);
7152 free_bp_location (loc
);
7158 check_duplicates (b
);
7161 if (breakpoints_always_inserted_mode () && should_insert
7162 && (target_has_execution
7163 || (gdbarch_has_global_solist (target_gdbarch
)
7164 && target_supports_multi_process ())))
7165 insert_breakpoint_locations ();
7167 do_cleanups (cleanups
);
7171 breakpoint_retire_moribund (void)
7173 struct bp_location
*loc
;
7176 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7177 if (--(loc
->events_till_retirement
) == 0)
7179 free_bp_location (loc
);
7180 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7186 update_global_location_list_nothrow (int inserting
)
7188 struct gdb_exception e
;
7189 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7190 update_global_location_list (inserting
);
7193 /* Clear BPT from a BPS. */
7195 bpstat_remove_breakpoint (bpstat bps
, struct breakpoint
*bpt
)
7198 for (bs
= bps
; bs
; bs
= bs
->next
)
7199 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7201 bs
->breakpoint_at
= NULL
;
7203 /* bs->commands will be freed later. */
7207 /* Callback for iterate_over_threads. */
7209 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
7211 struct breakpoint
*bpt
= data
;
7212 bpstat_remove_breakpoint (th
->stop_bpstat
, bpt
);
7216 /* Delete a breakpoint and clean up all traces of it in the data
7220 delete_breakpoint (struct breakpoint
*bpt
)
7222 struct breakpoint
*b
;
7223 struct bp_location
*loc
, *next
;
7225 gdb_assert (bpt
!= NULL
);
7227 /* Has this bp already been deleted? This can happen because multiple
7228 lists can hold pointers to bp's. bpstat lists are especial culprits.
7230 One example of this happening is a watchpoint's scope bp. When the
7231 scope bp triggers, we notice that the watchpoint is out of scope, and
7232 delete it. We also delete its scope bp. But the scope bp is marked
7233 "auto-deleting", and is already on a bpstat. That bpstat is then
7234 checked for auto-deleting bp's, which are deleted.
7236 A real solution to this problem might involve reference counts in bp's,
7237 and/or giving them pointers back to their referencing bpstat's, and
7238 teaching delete_breakpoint to only free a bp's storage when no more
7239 references were extent. A cheaper bandaid was chosen. */
7240 if (bpt
->type
== bp_none
)
7243 observer_notify_breakpoint_deleted (bpt
->number
);
7245 if (breakpoint_chain
== bpt
)
7246 breakpoint_chain
= bpt
->next
;
7251 b
->next
= bpt
->next
;
7255 free_command_lines (&bpt
->commands
);
7256 if (bpt
->cond_string
!= NULL
)
7257 xfree (bpt
->cond_string
);
7258 if (bpt
->addr_string
!= NULL
)
7259 xfree (bpt
->addr_string
);
7260 if (bpt
->exp
!= NULL
)
7262 if (bpt
->exp_string
!= NULL
)
7263 xfree (bpt
->exp_string
);
7264 if (bpt
->val
!= NULL
)
7265 value_free (bpt
->val
);
7266 if (bpt
->source_file
!= NULL
)
7267 xfree (bpt
->source_file
);
7268 if (bpt
->exec_pathname
!= NULL
)
7269 xfree (bpt
->exec_pathname
);
7271 /* Be sure no bpstat's are pointing at it after it's been freed. */
7272 /* FIXME, how can we find all bpstat's?
7273 We just check stop_bpstat for now. Note that we cannot just
7274 remove bpstats pointing at bpt from the stop_bpstat list
7275 entirely, as breakpoint commands are associated with the bpstat;
7276 if we remove it here, then the later call to
7277 bpstat_do_actions (&stop_bpstat);
7278 in event-top.c won't do anything, and temporary breakpoints
7279 with commands won't work. */
7281 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
7283 /* Now that breakpoint is removed from breakpoint
7284 list, update the global location list. This
7285 will remove locations that used to belong to
7286 this breakpoint. Do this before freeing
7287 the breakpoint itself, since remove_breakpoint
7288 looks at location's owner. It might be better
7289 design to have location completely self-contained,
7290 but it's not the case now. */
7291 update_global_location_list (0);
7294 /* On the chance that someone will soon try again to delete this same
7295 bp, we mark it as deleted before freeing its storage. */
7296 bpt
->type
= bp_none
;
7302 do_delete_breakpoint_cleanup (void *b
)
7304 delete_breakpoint (b
);
7308 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7310 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7314 delete_command (char *arg
, int from_tty
)
7316 struct breakpoint
*b
, *temp
;
7322 int breaks_to_delete
= 0;
7324 /* Delete all breakpoints if no argument.
7325 Do not delete internal or call-dummy breakpoints, these
7326 have to be deleted with an explicit breakpoint number argument. */
7329 if (b
->type
!= bp_call_dummy
&&
7330 b
->type
!= bp_shlib_event
&&
7331 b
->type
!= bp_thread_event
&&
7332 b
->type
!= bp_overlay_event
&&
7335 breaks_to_delete
= 1;
7340 /* Ask user only if there are some breakpoints to delete. */
7342 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7344 ALL_BREAKPOINTS_SAFE (b
, temp
)
7346 if (b
->type
!= bp_call_dummy
&&
7347 b
->type
!= bp_shlib_event
&&
7348 b
->type
!= bp_thread_event
&&
7349 b
->type
!= bp_overlay_event
&&
7351 delete_breakpoint (b
);
7356 map_breakpoint_numbers (arg
, delete_breakpoint
);
7360 all_locations_are_pending (struct bp_location
*loc
)
7362 for (; loc
; loc
= loc
->next
)
7363 if (!loc
->shlib_disabled
)
7368 /* Subroutine of update_breakpoint_locations to simplify it.
7369 Return non-zero if multiple fns in list LOC have the same name.
7370 Null names are ignored. */
7373 ambiguous_names_p (struct bp_location
*loc
)
7375 struct bp_location
*l
;
7376 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7377 (int (*) (const void *, const void *)) streq
,
7378 NULL
, xcalloc
, xfree
);
7380 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7383 const char *name
= l
->function_name
;
7385 /* Allow for some names to be NULL, ignore them. */
7389 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7391 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7406 update_breakpoint_locations (struct breakpoint
*b
,
7407 struct symtabs_and_lines sals
)
7411 struct bp_location
*existing_locations
= b
->loc
;
7413 /* If there's no new locations, and all existing locations
7414 are pending, don't do anything. This optimizes
7415 the common case where all locations are in the same
7416 shared library, that was unloaded. We'd like to
7417 retain the location, so that when the library
7418 is loaded again, we don't loose the enabled/disabled
7419 status of the individual locations. */
7420 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7425 for (i
= 0; i
< sals
.nelts
; ++i
)
7427 struct bp_location
*new_loc
=
7428 add_location_to_breakpoint (b
, &(sals
.sals
[i
]));
7430 /* Reparse conditions, they might contain references to the
7432 if (b
->cond_string
!= NULL
)
7434 struct gdb_exception e
;
7437 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7439 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7444 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7445 b
->number
, e
.message
);
7446 new_loc
->enabled
= 0;
7450 if (b
->source_file
!= NULL
)
7451 xfree (b
->source_file
);
7452 if (sals
.sals
[i
].symtab
== NULL
)
7453 b
->source_file
= NULL
;
7456 savestring (sals
.sals
[i
].symtab
->filename
,
7457 strlen (sals
.sals
[i
].symtab
->filename
));
7459 if (b
->line_number
== 0)
7460 b
->line_number
= sals
.sals
[i
].line
;
7463 /* Update locations of permanent breakpoints. */
7464 if (b
->enable_state
== bp_permanent
)
7465 make_breakpoint_permanent (b
);
7467 /* If possible, carry over 'disable' status from existing breakpoints. */
7469 struct bp_location
*e
= existing_locations
;
7470 /* If there are multiple breakpoints with the same function name,
7471 e.g. for inline functions, comparing function names won't work.
7472 Instead compare pc addresses; this is just a heuristic as things
7473 may have moved, but in practice it gives the correct answer
7474 often enough until a better solution is found. */
7475 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7477 for (; e
; e
= e
->next
)
7479 if (!e
->enabled
&& e
->function_name
)
7481 struct bp_location
*l
= b
->loc
;
7482 if (have_ambiguous_names
)
7484 for (; l
; l
= l
->next
)
7485 if (e
->address
== l
->address
)
7493 for (; l
; l
= l
->next
)
7494 if (l
->function_name
7495 && strcmp (e
->function_name
, l
->function_name
) == 0)
7505 update_global_location_list (1);
7509 /* Reset a breakpoint given it's struct breakpoint * BINT.
7510 The value we return ends up being the return value from catch_errors.
7511 Unused in this case. */
7514 breakpoint_re_set_one (void *bint
)
7516 /* get past catch_errs */
7517 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7521 int *not_found_ptr
= ¬_found
;
7522 struct symtabs_and_lines sals
= {};
7523 struct symtabs_and_lines expanded
;
7525 enum enable_state save_enable
;
7526 struct gdb_exception e
;
7527 struct cleanup
*cleanups
;
7532 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7536 case bp_hardware_breakpoint
:
7538 if (b
->addr_string
== NULL
)
7540 /* Anything without a string can't be re-set. */
7541 delete_breakpoint (b
);
7545 set_language (b
->language
);
7546 input_radix
= b
->input_radix
;
7548 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7550 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7555 int not_found_and_ok
= 0;
7556 /* For pending breakpoints, it's expected that parsing
7557 will fail until the right shared library is loaded.
7558 User has already told to create pending breakpoints and
7559 don't need extra messages. If breakpoint is in bp_shlib_disabled
7560 state, then user already saw the message about that breakpoint
7561 being disabled, and don't want to see more errors. */
7563 && (b
->condition_not_parsed
7564 || (b
->loc
&& b
->loc
->shlib_disabled
)
7565 || b
->enable_state
== bp_disabled
))
7566 not_found_and_ok
= 1;
7568 if (!not_found_and_ok
)
7570 /* We surely don't want to warn about the same breakpoint
7571 10 times. One solution, implemented here, is disable
7572 the breakpoint on error. Another solution would be to
7573 have separate 'warning emitted' flag. Since this
7574 happens only when a binary has changed, I don't know
7575 which approach is better. */
7576 b
->enable_state
= bp_disabled
;
7577 throw_exception (e
);
7584 gdb_assert (sals
.nelts
== 1);
7585 resolve_sal_pc (&sals
.sals
[0]);
7586 if (b
->condition_not_parsed
&& s
&& s
[0])
7588 char *cond_string
= 0;
7590 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7591 &cond_string
, &thread
);
7593 b
->cond_string
= cond_string
;
7595 b
->condition_not_parsed
= 0;
7597 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7598 cleanups
= make_cleanup (xfree
, sals
.sals
);
7599 update_breakpoint_locations (b
, expanded
);
7600 do_cleanups (cleanups
);
7604 case bp_hardware_watchpoint
:
7605 case bp_read_watchpoint
:
7606 case bp_access_watchpoint
:
7607 /* Watchpoint can be either on expression using entirely global variables,
7608 or it can be on local variables.
7610 Watchpoints of the first kind are never auto-deleted, and even persist
7611 across program restarts. Since they can use variables from shared
7612 libraries, we need to reparse expression as libraries are loaded
7615 Watchpoints on local variables can also change meaning as result
7616 of solib event. For example, if a watchpoint uses both a local and
7617 a global variables in expression, it's a local watchpoint, but
7618 unloading of a shared library will make the expression invalid.
7619 This is not a very common use case, but we still re-evaluate
7620 expression, to avoid surprises to the user.
7622 Note that for local watchpoints, we re-evaluate it only if
7623 watchpoints frame id is still valid. If it's not, it means
7624 the watchpoint is out of scope and will be deleted soon. In fact,
7625 I'm not sure we'll ever be called in this case.
7627 If a local watchpoint's frame id is still valid, then
7628 b->exp_valid_block is likewise valid, and we can safely use it.
7630 Don't do anything about disabled watchpoints, since they will
7631 be reevaluated again when enabled. */
7632 update_watchpoint (b
, 1 /* reparse */);
7634 /* We needn't really do anything to reset these, since the mask
7635 that requests them is unaffected by e.g., new libraries being
7641 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7643 /* Delete overlay event breakpoints; they will be reset later by
7644 breakpoint_re_set. */
7645 case bp_overlay_event
:
7646 delete_breakpoint (b
);
7649 /* This breakpoint is special, it's set up when the inferior
7650 starts and we really don't want to touch it. */
7651 case bp_shlib_event
:
7653 /* Like bp_shlib_event, this breakpoint type is special.
7654 Once it is set up, we do not want to touch it. */
7655 case bp_thread_event
:
7657 /* Keep temporary breakpoints, which can be encountered when we step
7658 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7659 Otherwise these should have been blown away via the cleanup chain
7660 or by breakpoint_init_inferior when we rerun the executable. */
7663 case bp_watchpoint_scope
:
7665 case bp_step_resume
:
7667 case bp_longjmp_resume
:
7674 /* Re-set all breakpoints after symbols have been re-loaded. */
7676 breakpoint_re_set (void)
7678 struct breakpoint
*b
, *temp
;
7679 enum language save_language
;
7680 int save_input_radix
;
7682 save_language
= current_language
->la_language
;
7683 save_input_radix
= input_radix
;
7684 ALL_BREAKPOINTS_SAFE (b
, temp
)
7686 /* Format possible error msg */
7687 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7689 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7690 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7691 do_cleanups (cleanups
);
7693 set_language (save_language
);
7694 input_radix
= save_input_radix
;
7696 create_overlay_event_breakpoint ("_ovly_debug_event");
7699 /* Reset the thread number of this breakpoint:
7701 - If the breakpoint is for all threads, leave it as-is.
7702 - Else, reset it to the current thread for inferior_ptid. */
7704 breakpoint_re_set_thread (struct breakpoint
*b
)
7706 if (b
->thread
!= -1)
7708 if (in_thread_list (inferior_ptid
))
7709 b
->thread
= pid_to_thread_id (inferior_ptid
);
7713 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7714 If from_tty is nonzero, it prints a message to that effect,
7715 which ends with a period (no newline). */
7718 set_ignore_count (int bptnum
, int count
, int from_tty
)
7720 struct breakpoint
*b
;
7726 if (b
->number
== bptnum
)
7728 b
->ignore_count
= count
;
7732 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7734 else if (count
== 1)
7735 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7738 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7741 breakpoints_changed ();
7742 observer_notify_breakpoint_modified (b
->number
);
7746 error (_("No breakpoint number %d."), bptnum
);
7750 make_breakpoint_silent (struct breakpoint
*b
)
7752 /* Silence the breakpoint. */
7756 /* Command to set ignore-count of breakpoint N to COUNT. */
7759 ignore_command (char *args
, int from_tty
)
7765 error_no_arg (_("a breakpoint number"));
7767 num
= get_number (&p
);
7769 error (_("bad breakpoint number: '%s'"), args
);
7771 error (_("Second argument (specified ignore-count) is missing."));
7773 set_ignore_count (num
,
7774 longest_to_int (value_as_long (parse_and_eval (p
))),
7777 printf_filtered ("\n");
7780 /* Call FUNCTION on each of the breakpoints
7781 whose numbers are given in ARGS. */
7784 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7789 struct breakpoint
*b
, *tmp
;
7793 error_no_arg (_("one or more breakpoint numbers"));
7800 num
= get_number_or_range (&p1
);
7803 warning (_("bad breakpoint number at or near '%s'"), p
);
7807 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7808 if (b
->number
== num
)
7810 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7813 if (related_breakpoint
)
7814 function (related_breakpoint
);
7818 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7824 static struct bp_location
*
7825 find_location_by_number (char *number
)
7827 char *dot
= strchr (number
, '.');
7831 struct breakpoint
*b
;
7832 struct bp_location
*loc
;
7837 bp_num
= get_number_or_range (&p1
);
7839 error (_("Bad breakpoint number '%s'"), number
);
7842 if (b
->number
== bp_num
)
7847 if (!b
|| b
->number
!= bp_num
)
7848 error (_("Bad breakpoint number '%s'"), number
);
7851 loc_num
= get_number_or_range (&p1
);
7853 error (_("Bad breakpoint location number '%s'"), number
);
7857 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7860 error (_("Bad breakpoint location number '%s'"), dot
+1);
7866 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7867 If from_tty is nonzero, it prints a message to that effect,
7868 which ends with a period (no newline). */
7871 disable_breakpoint (struct breakpoint
*bpt
)
7873 /* Never disable a watchpoint scope breakpoint; we want to
7874 hit them when we leave scope so we can delete both the
7875 watchpoint and its scope breakpoint at that time. */
7876 if (bpt
->type
== bp_watchpoint_scope
)
7879 /* You can't disable permanent breakpoints. */
7880 if (bpt
->enable_state
== bp_permanent
)
7883 bpt
->enable_state
= bp_disabled
;
7885 update_global_location_list (0);
7887 observer_notify_breakpoint_modified (bpt
->number
);
7891 disable_command (char *args
, int from_tty
)
7893 struct breakpoint
*bpt
;
7895 ALL_BREAKPOINTS (bpt
)
7899 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7905 case bp_hardware_breakpoint
:
7907 case bp_hardware_watchpoint
:
7908 case bp_read_watchpoint
:
7909 case bp_access_watchpoint
:
7910 disable_breakpoint (bpt
);
7914 else if (strchr (args
, '.'))
7916 struct bp_location
*loc
= find_location_by_number (args
);
7919 update_global_location_list (0);
7922 map_breakpoint_numbers (args
, disable_breakpoint
);
7926 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7928 int target_resources_ok
, other_type_used
;
7931 if (bpt
->type
== bp_hardware_breakpoint
)
7934 i
= hw_breakpoint_used_count ();
7935 target_resources_ok
=
7936 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7938 if (target_resources_ok
== 0)
7939 error (_("No hardware breakpoint support in the target."));
7940 else if (target_resources_ok
< 0)
7941 error (_("Hardware breakpoints used exceeds limit."));
7944 if (bpt
->type
== bp_watchpoint
||
7945 bpt
->type
== bp_hardware_watchpoint
||
7946 bpt
->type
== bp_read_watchpoint
||
7947 bpt
->type
== bp_access_watchpoint
)
7949 struct gdb_exception e
;
7951 TRY_CATCH (e
, RETURN_MASK_ALL
)
7953 update_watchpoint (bpt
, 1 /* reparse */);
7957 exception_fprintf (gdb_stderr
, e
, _("Cannot enable watchpoint %d: "),
7963 if (bpt
->enable_state
!= bp_permanent
)
7964 bpt
->enable_state
= bp_enabled
;
7965 bpt
->disposition
= disposition
;
7966 update_global_location_list (1);
7967 breakpoints_changed ();
7969 observer_notify_breakpoint_modified (bpt
->number
);
7974 enable_breakpoint (struct breakpoint
*bpt
)
7976 do_enable_breakpoint (bpt
, bpt
->disposition
);
7979 /* The enable command enables the specified breakpoints (or all defined
7980 breakpoints) so they once again become (or continue to be) effective
7981 in stopping the inferior. */
7984 enable_command (char *args
, int from_tty
)
7986 struct breakpoint
*bpt
;
7988 ALL_BREAKPOINTS (bpt
)
7992 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7998 case bp_hardware_breakpoint
:
8000 case bp_hardware_watchpoint
:
8001 case bp_read_watchpoint
:
8002 case bp_access_watchpoint
:
8003 enable_breakpoint (bpt
);
8007 else if (strchr (args
, '.'))
8009 struct bp_location
*loc
= find_location_by_number (args
);
8012 update_global_location_list (1);
8015 map_breakpoint_numbers (args
, enable_breakpoint
);
8019 enable_once_breakpoint (struct breakpoint
*bpt
)
8021 do_enable_breakpoint (bpt
, disp_disable
);
8025 enable_once_command (char *args
, int from_tty
)
8027 map_breakpoint_numbers (args
, enable_once_breakpoint
);
8031 enable_delete_breakpoint (struct breakpoint
*bpt
)
8033 do_enable_breakpoint (bpt
, disp_del
);
8037 enable_delete_command (char *args
, int from_tty
)
8039 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
8043 set_breakpoint_cmd (char *args
, int from_tty
)
8048 show_breakpoint_cmd (char *args
, int from_tty
)
8052 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
8054 struct symtabs_and_lines
8055 decode_line_spec_1 (char *string
, int funfirstline
)
8057 struct symtabs_and_lines sals
;
8059 error (_("Empty line specification."));
8060 if (default_breakpoint_valid
)
8061 sals
= decode_line_1 (&string
, funfirstline
,
8062 default_breakpoint_symtab
,
8063 default_breakpoint_line
,
8064 (char ***) NULL
, NULL
);
8066 sals
= decode_line_1 (&string
, funfirstline
,
8067 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
8069 error (_("Junk at end of line specification: %s"), string
);
8073 /* Create and insert a raw software breakpoint at PC. Return an
8074 identifier, which should be used to remove the breakpoint later.
8075 In general, places which call this should be using something on the
8076 breakpoint chain instead; this function should be eliminated
8080 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
8082 struct bp_target_info
*bp_tgt
;
8084 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
8085 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
8087 bp_tgt
->placed_address
= pc
;
8088 if (target_insert_breakpoint (bp_tgt
) != 0)
8090 /* Could not insert the breakpoint. */
8098 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
8101 deprecated_remove_raw_breakpoint (void *bp
)
8103 struct bp_target_info
*bp_tgt
= bp
;
8106 ret
= target_remove_breakpoint (bp_tgt
);
8112 /* One (or perhaps two) breakpoints used for software single stepping. */
8114 static void *single_step_breakpoints
[2];
8116 /* Create and insert a breakpoint for software single step. */
8119 insert_single_step_breakpoint (CORE_ADDR next_pc
)
8123 if (single_step_breakpoints
[0] == NULL
)
8124 bpt_p
= &single_step_breakpoints
[0];
8127 gdb_assert (single_step_breakpoints
[1] == NULL
);
8128 bpt_p
= &single_step_breakpoints
[1];
8131 /* NOTE drow/2006-04-11: A future improvement to this function would be
8132 to only create the breakpoints once, and actually put them on the
8133 breakpoint chain. That would let us use set_raw_breakpoint. We could
8134 adjust the addresses each time they were needed. Doing this requires
8135 corresponding changes elsewhere where single step breakpoints are
8136 handled, however. So, for now, we use this. */
8138 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
8140 error (_("Could not insert single-step breakpoint at 0x%s"),
8141 paddr_nz (next_pc
));
8144 /* Remove and delete any breakpoints used for software single step. */
8147 remove_single_step_breakpoints (void)
8149 gdb_assert (single_step_breakpoints
[0] != NULL
);
8151 /* See insert_single_step_breakpoint for more about this deprecated
8153 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8154 single_step_breakpoints
[0] = NULL
;
8156 if (single_step_breakpoints
[1] != NULL
)
8158 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8159 single_step_breakpoints
[1] = NULL
;
8163 /* Check whether a software single-step breakpoint is inserted at PC. */
8166 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8170 for (i
= 0; i
< 2; i
++)
8172 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8173 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8180 /* Tracepoint-specific operations. */
8182 /* Set tracepoint count to NUM. */
8184 set_tracepoint_count (int num
)
8186 tracepoint_count
= num
;
8187 set_internalvar (lookup_internalvar ("tpnum"),
8188 value_from_longest (builtin_type_int32
, (LONGEST
) num
));
8192 trace_command (char *arg
, int from_tty
)
8194 break_command_really (arg
,
8195 NULL
, 0, 1 /* parse arg */,
8196 0 /* tempflag */, 0 /* hardwareflag */,
8198 0 /* Ignore count */,
8199 pending_break_support
,
8203 set_tracepoint_count (breakpoint_count
);
8206 /* Print information on tracepoint number TPNUM_EXP, or all if
8210 tracepoints_info (char *tpnum_exp
, int from_tty
)
8212 struct breakpoint
*b
;
8213 int tps_to_list
= 0;
8215 /* In the no-arguments case, say "No tracepoints" if none found. */
8228 ui_out_message (uiout
, 0, "No tracepoints.\n");
8233 /* Otherwise be the same as "info break". */
8234 breakpoints_info (tpnum_exp
, from_tty
);
8237 /* The 'enable trace' command enables tracepoints.
8238 Not supported by all targets. */
8240 enable_trace_command (char *args
, int from_tty
)
8242 enable_command (args
, from_tty
);
8245 /* The 'disable trace' command disables tracepoints.
8246 Not supported by all targets. */
8248 disable_trace_command (char *args
, int from_tty
)
8250 disable_command (args
, from_tty
);
8253 /* Remove a tracepoint (or all if no argument) */
8255 delete_trace_command (char *arg
, int from_tty
)
8257 struct breakpoint
*b
, *temp
;
8263 int breaks_to_delete
= 0;
8265 /* Delete all breakpoints if no argument.
8266 Do not delete internal or call-dummy breakpoints, these
8267 have to be deleted with an explicit breakpoint number argument. */
8272 breaks_to_delete
= 1;
8277 /* Ask user only if there are some breakpoints to delete. */
8279 || (breaks_to_delete
&& query (_("Delete all tracepoints? "))))
8281 ALL_BREAKPOINTS_SAFE (b
, temp
)
8283 if (b
->type
== bp_tracepoint
&&
8285 delete_breakpoint (b
);
8290 map_breakpoint_numbers (arg
, delete_breakpoint
);
8293 /* Set passcount for tracepoint.
8295 First command argument is passcount, second is tracepoint number.
8296 If tracepoint number omitted, apply to most recently defined.
8297 Also accepts special argument "all". */
8300 trace_pass_command (char *args
, int from_tty
)
8302 struct breakpoint
*t1
= (struct breakpoint
*) -1, *t2
;
8306 if (args
== 0 || *args
== 0)
8307 error (_("passcount command requires an argument (count + optional TP num)"));
8309 count
= strtoul (args
, &args
, 10); /* Count comes first, then TP num. */
8311 while (*args
&& isspace ((int) *args
))
8314 if (*args
&& strncasecmp (args
, "all", 3) == 0)
8316 args
+= 3; /* Skip special argument "all". */
8319 error (_("Junk at end of arguments."));
8322 t1
= get_tracepoint_by_number (&args
, 1, 1);
8328 ALL_TRACEPOINTS (t2
)
8329 if (t1
== (struct breakpoint
*) -1 || t1
== t2
)
8331 t2
->pass_count
= count
;
8332 observer_notify_tracepoint_modified (t2
->number
);
8334 printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
8338 t1
= get_tracepoint_by_number (&args
, 1, 0);
8345 get_tracepoint (int num
)
8347 struct breakpoint
*t
;
8350 if (t
->number
== num
)
8356 /* Utility: parse a tracepoint number and look it up in the list.
8357 If MULTI_P is true, there might be a range of tracepoints in ARG.
8358 if OPTIONAL_P is true, then if the argument is missing, the most
8359 recent tracepoint (tracepoint_count) is returned. */
8361 get_tracepoint_by_number (char **arg
, int multi_p
, int optional_p
)
8363 extern int tracepoint_count
;
8364 struct breakpoint
*t
;
8366 char *instring
= arg
== NULL
? NULL
: *arg
;
8368 if (arg
== NULL
|| *arg
== NULL
|| ! **arg
)
8371 tpnum
= tracepoint_count
;
8373 error_no_arg (_("tracepoint number"));
8376 tpnum
= multi_p
? get_number_or_range (arg
) : get_number (arg
);
8380 if (instring
&& *instring
)
8381 printf_filtered (_("bad tracepoint number at or near '%s'\n"),
8384 printf_filtered (_("Tracepoint argument missing and no previous tracepoint\n"));
8389 if (t
->number
== tpnum
)
8394 /* FIXME: if we are in the middle of a range we don't want to give
8395 a message. The current interface to get_number_or_range doesn't
8396 allow us to discover this. */
8397 printf_unfiltered ("No tracepoint number %d.\n", tpnum
);
8401 /* save-tracepoints command */
8403 tracepoint_save_command (char *args
, int from_tty
)
8405 struct breakpoint
*tp
;
8407 struct action_line
*line
;
8409 char *i1
= " ", *i2
= " ";
8410 char *indent
, *actionline
, *pathname
;
8412 struct cleanup
*cleanup
;
8414 if (args
== 0 || *args
== 0)
8415 error (_("Argument required (file name in which to save tracepoints)"));
8417 /* See if we have anything to save. */
8418 ALL_TRACEPOINTS (tp
)
8425 warning (_("save-tracepoints: no tracepoints to save."));
8429 pathname
= tilde_expand (args
);
8430 cleanup
= make_cleanup (xfree
, pathname
);
8431 if (!(fp
= fopen (pathname
, "w")))
8432 error (_("Unable to open file '%s' for saving tracepoints (%s)"),
8433 args
, safe_strerror (errno
));
8434 make_cleanup_fclose (fp
);
8436 ALL_TRACEPOINTS (tp
)
8438 if (tp
->addr_string
)
8439 fprintf (fp
, "trace %s\n", tp
->addr_string
);
8442 sprintf_vma (tmp
, tp
->loc
->address
);
8443 fprintf (fp
, "trace *0x%s\n", tmp
);
8447 fprintf (fp
, " passcount %d\n", tp
->pass_count
);
8451 fprintf (fp
, " actions\n");
8453 for (line
= tp
->actions
; line
; line
= line
->next
)
8455 struct cmd_list_element
*cmd
;
8457 QUIT
; /* allow user to bail out with ^C */
8458 actionline
= line
->action
;
8459 while (isspace ((int) *actionline
))
8462 fprintf (fp
, "%s%s\n", indent
, actionline
);
8463 if (*actionline
!= '#') /* skip for comment lines */
8465 cmd
= lookup_cmd (&actionline
, cmdlist
, "", -1, 1);
8467 error (_("Bad action list item: %s"), actionline
);
8468 if (cmd_cfunc_eq (cmd
, while_stepping_pseudocommand
))
8470 else if (cmd_cfunc_eq (cmd
, end_actions_pseudocommand
))
8476 do_cleanups (cleanup
);
8478 printf_filtered (_("Tracepoints saved to file '%s'.\n"), args
);
8482 /* Create a vector of all tracepoints. */
8487 VEC(breakpoint_p
) *tp_vec
= 0;
8488 struct breakpoint
*tp
;
8490 ALL_TRACEPOINTS (tp
)
8492 VEC_safe_push (breakpoint_p
, tp_vec
, tp
);
8499 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8500 It is defined as a macro to prevent duplication.
8501 COMMAND should be a string constant containing the name of the command. */
8502 #define BREAK_ARGS_HELP(command) \
8503 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8504 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8505 If a line number is specified, break at start of code for that line.\n\
8506 If a function is specified, break at start of code for that function.\n\
8507 If an address is specified, break at that exact address.\n\
8508 With no LOCATION, uses current execution address of selected stack frame.\n\
8509 This is useful for breaking on return to a stack frame.\n\
8511 THREADNUM is the number from \"info threads\".\n\
8512 CONDITION is a boolean expression.\n\
8514 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8516 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8518 /* List of subcommands for "catch". */
8519 static struct cmd_list_element
*catch_cmdlist
;
8521 /* List of subcommands for "tcatch". */
8522 static struct cmd_list_element
*tcatch_cmdlist
;
8524 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
8525 lists, and pass some additional user data to the command function. */
8527 add_catch_command (char *name
, char *docstring
,
8528 void (*sfunc
) (char *args
, int from_tty
,
8529 struct cmd_list_element
*command
),
8530 void *user_data_catch
,
8531 void *user_data_tcatch
)
8533 struct cmd_list_element
*command
;
8535 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8537 set_cmd_sfunc (command
, sfunc
);
8538 set_cmd_context (command
, user_data_catch
);
8540 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8542 set_cmd_sfunc (command
, sfunc
);
8543 set_cmd_context (command
, user_data_tcatch
);
8547 _initialize_breakpoint (void)
8549 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8550 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8551 struct cmd_list_element
*c
;
8553 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8555 breakpoint_chain
= 0;
8556 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8557 before a breakpoint is set. */
8558 breakpoint_count
= 0;
8560 tracepoint_count
= 0;
8562 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8563 Set ignore-count of breakpoint number N to COUNT.\n\
8564 Usage is `ignore N COUNT'."));
8566 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8568 add_com ("commands", class_breakpoint
, commands_command
, _("\
8569 Set commands to be executed when a breakpoint is hit.\n\
8570 Give breakpoint number as argument after \"commands\".\n\
8571 With no argument, the targeted breakpoint is the last one set.\n\
8572 The commands themselves follow starting on the next line.\n\
8573 Type a line containing \"end\" to indicate the end of them.\n\
8574 Give \"silent\" as the first line to make the breakpoint silent;\n\
8575 then no output is printed when it is hit, except what the commands print."));
8577 add_com ("condition", class_breakpoint
, condition_command
, _("\
8578 Specify breakpoint number N to break only if COND is true.\n\
8579 Usage is `condition N COND', where N is an integer and COND is an\n\
8580 expression to be evaluated whenever breakpoint N is reached."));
8582 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8583 Set a temporary breakpoint.\n\
8584 Like \"break\" except the breakpoint is only temporary,\n\
8585 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8586 by using \"enable delete\" on the breakpoint number.\n\
8588 BREAK_ARGS_HELP ("tbreak")));
8589 set_cmd_completer (c
, location_completer
);
8591 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8592 Set a hardware assisted breakpoint.\n\
8593 Like \"break\" except the breakpoint requires hardware support,\n\
8594 some target hardware may not have this support.\n\
8596 BREAK_ARGS_HELP ("hbreak")));
8597 set_cmd_completer (c
, location_completer
);
8599 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8600 Set a temporary hardware assisted breakpoint.\n\
8601 Like \"hbreak\" except the breakpoint is only temporary,\n\
8602 so it will be deleted when hit.\n\
8604 BREAK_ARGS_HELP ("thbreak")));
8605 set_cmd_completer (c
, location_completer
);
8607 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8608 Enable some breakpoints.\n\
8609 Give breakpoint numbers (separated by spaces) as arguments.\n\
8610 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8611 This is used to cancel the effect of the \"disable\" command.\n\
8612 With a subcommand you can enable temporarily."),
8613 &enablelist
, "enable ", 1, &cmdlist
);
8615 add_com ("ab", class_breakpoint
, enable_command
, _("\
8616 Enable some breakpoints.\n\
8617 Give breakpoint numbers (separated by spaces) as arguments.\n\
8618 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8619 This is used to cancel the effect of the \"disable\" command.\n\
8620 With a subcommand you can enable temporarily."));
8622 add_com_alias ("en", "enable", class_breakpoint
, 1);
8624 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8625 Enable some breakpoints.\n\
8626 Give breakpoint numbers (separated by spaces) as arguments.\n\
8627 This is used to cancel the effect of the \"disable\" command.\n\
8628 May be abbreviated to simply \"enable\".\n"),
8629 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8631 add_cmd ("once", no_class
, enable_once_command
, _("\
8632 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8633 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8636 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8637 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8638 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8641 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8642 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8643 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8646 add_cmd ("once", no_class
, enable_once_command
, _("\
8647 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8648 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8651 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8652 Disable some breakpoints.\n\
8653 Arguments are breakpoint numbers with spaces in between.\n\
8654 To disable all breakpoints, give no argument.\n\
8655 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8656 &disablelist
, "disable ", 1, &cmdlist
);
8657 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8658 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8660 add_com ("sb", class_breakpoint
, disable_command
, _("\
8661 Disable some breakpoints.\n\
8662 Arguments are breakpoint numbers with spaces in between.\n\
8663 To disable all breakpoints, give no argument.\n\
8664 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8666 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8667 Disable some breakpoints.\n\
8668 Arguments are breakpoint numbers with spaces in between.\n\
8669 To disable all breakpoints, give no argument.\n\
8670 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8671 This command may be abbreviated \"disable\"."),
8674 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8675 Delete some breakpoints or auto-display expressions.\n\
8676 Arguments are breakpoint numbers with spaces in between.\n\
8677 To delete all breakpoints, give no argument.\n\
8679 Also a prefix command for deletion of other GDB objects.\n\
8680 The \"unset\" command is also an alias for \"delete\"."),
8681 &deletelist
, "delete ", 1, &cmdlist
);
8682 add_com_alias ("d", "delete", class_breakpoint
, 1);
8683 add_com_alias ("del", "delete", class_breakpoint
, 1);
8685 add_com ("db", class_breakpoint
, delete_command
, _("\
8686 Delete some breakpoints.\n\
8687 Arguments are breakpoint numbers with spaces in between.\n\
8688 To delete all breakpoints, give no argument.\n"));
8690 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8691 Delete some breakpoints or auto-display expressions.\n\
8692 Arguments are breakpoint numbers with spaces in between.\n\
8693 To delete all breakpoints, give no argument.\n\
8694 This command may be abbreviated \"delete\"."),
8697 add_com ("clear", class_breakpoint
, clear_command
, _("\
8698 Clear breakpoint at specified line or function.\n\
8699 Argument may be line number, function name, or \"*\" and an address.\n\
8700 If line number is specified, all breakpoints in that line are cleared.\n\
8701 If function is specified, breakpoints at beginning of function are cleared.\n\
8702 If an address is specified, breakpoints at that address are cleared.\n\
8704 With no argument, clears all breakpoints in the line that the selected frame\n\
8707 See also the \"delete\" command which clears breakpoints by number."));
8709 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8710 Set breakpoint at specified line or function.\n"
8711 BREAK_ARGS_HELP ("break")));
8712 set_cmd_completer (c
, location_completer
);
8714 add_com_alias ("b", "break", class_run
, 1);
8715 add_com_alias ("br", "break", class_run
, 1);
8716 add_com_alias ("bre", "break", class_run
, 1);
8717 add_com_alias ("brea", "break", class_run
, 1);
8721 add_com_alias ("ba", "break", class_breakpoint
, 1);
8722 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8727 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8728 Break in function/address or break at a line in the current file."),
8729 &stoplist
, "stop ", 1, &cmdlist
);
8730 add_cmd ("in", class_breakpoint
, stopin_command
,
8731 _("Break in function or address."), &stoplist
);
8732 add_cmd ("at", class_breakpoint
, stopat_command
,
8733 _("Break at a line in the current file."), &stoplist
);
8734 add_com ("status", class_info
, breakpoints_info
, _("\
8735 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8736 The \"Type\" column indicates one of:\n\
8737 \tbreakpoint - normal breakpoint\n\
8738 \twatchpoint - watchpoint\n\
8739 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8740 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8741 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8742 address and file/line number respectively.\n\
8744 Convenience variable \"$_\" and default examine address for \"x\"\n\
8745 are set to the address of the last breakpoint listed unless the command\n\
8746 is prefixed with \"server \".\n\n\
8747 Convenience variable \"$bpnum\" contains the number of the last\n\
8751 add_info ("breakpoints", breakpoints_info
, _("\
8752 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8753 The \"Type\" column indicates one of:\n\
8754 \tbreakpoint - normal breakpoint\n\
8755 \twatchpoint - watchpoint\n\
8756 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8757 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8758 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8759 address and file/line number respectively.\n\
8761 Convenience variable \"$_\" and default examine address for \"x\"\n\
8762 are set to the address of the last breakpoint listed unless the command\n\
8763 is prefixed with \"server \".\n\n\
8764 Convenience variable \"$bpnum\" contains the number of the last\n\
8768 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8769 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8770 The \"Type\" column indicates one of:\n\
8771 \tbreakpoint - normal breakpoint\n\
8772 \twatchpoint - watchpoint\n\
8773 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8774 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8775 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8776 address and file/line number respectively.\n\
8778 Convenience variable \"$_\" and default examine address for \"x\"\n\
8779 are set to the address of the last breakpoint listed unless the command\n\
8780 is prefixed with \"server \".\n\n\
8781 Convenience variable \"$bpnum\" contains the number of the last\n\
8784 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8785 Status of all breakpoints, or breakpoint number NUMBER.\n\
8786 The \"Type\" column indicates one of:\n\
8787 \tbreakpoint - normal breakpoint\n\
8788 \twatchpoint - watchpoint\n\
8789 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8790 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8791 \tuntil - internal breakpoint used by the \"until\" command\n\
8792 \tfinish - internal breakpoint used by the \"finish\" command\n\
8793 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8794 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8795 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8796 address and file/line number respectively.\n\
8798 Convenience variable \"$_\" and default examine address for \"x\"\n\
8799 are set to the address of the last breakpoint listed unless the command\n\
8800 is prefixed with \"server \".\n\n\
8801 Convenience variable \"$bpnum\" contains the number of the last\n\
8803 &maintenanceinfolist
);
8805 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
8806 Set catchpoints to catch events."),
8807 &catch_cmdlist
, "catch ",
8808 0/*allow-unknown*/, &cmdlist
);
8810 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
8811 Set temporary catchpoints to catch events."),
8812 &tcatch_cmdlist
, "tcatch ",
8813 0/*allow-unknown*/, &cmdlist
);
8815 /* Add catch and tcatch sub-commands. */
8816 add_catch_command ("catch", _("\
8817 Catch an exception, when caught.\n\
8818 With an argument, catch only exceptions with the given name."),
8819 catch_catch_command
,
8822 add_catch_command ("throw", _("\
8823 Catch an exception, when thrown.\n\
8824 With an argument, catch only exceptions with the given name."),
8825 catch_throw_command
,
8828 add_catch_command ("fork", _("Catch calls to fork."),
8829 catch_fork_command_1
,
8830 (void *) (uintptr_t) catch_fork_permanent
,
8831 (void *) (uintptr_t) catch_fork_temporary
);
8832 add_catch_command ("vfork", _("Catch calls to vfork."),
8833 catch_fork_command_1
,
8834 (void *) (uintptr_t) catch_vfork_permanent
,
8835 (void *) (uintptr_t) catch_vfork_temporary
);
8836 add_catch_command ("exec", _("Catch calls to exec."),
8837 catch_exec_command_1
,
8840 add_catch_command ("exception", _("\
8841 Catch Ada exceptions, when raised.\n\
8842 With an argument, catch only exceptions with the given name."),
8843 catch_ada_exception_command
,
8846 add_catch_command ("assert", _("\
8847 Catch failed Ada assertions, when raised.\n\
8848 With an argument, catch only exceptions with the given name."),
8849 catch_assert_command
,
8853 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8854 Set a watchpoint for an expression.\n\
8855 A watchpoint stops execution of your program whenever the value of\n\
8856 an expression changes."));
8857 set_cmd_completer (c
, expression_completer
);
8859 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8860 Set a read watchpoint for an expression.\n\
8861 A watchpoint stops execution of your program whenever the value of\n\
8862 an expression is read."));
8863 set_cmd_completer (c
, expression_completer
);
8865 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8866 Set a watchpoint for an expression.\n\
8867 A watchpoint stops execution of your program whenever the value of\n\
8868 an expression is either read or written."));
8869 set_cmd_completer (c
, expression_completer
);
8871 add_info ("watchpoints", breakpoints_info
,
8872 _("Synonym for ``info breakpoints''."));
8875 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8876 respond to changes - contrary to the description. */
8877 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8878 &can_use_hw_watchpoints
, _("\
8879 Set debugger's willingness to use watchpoint hardware."), _("\
8880 Show debugger's willingness to use watchpoint hardware."), _("\
8881 If zero, gdb will not use hardware for new watchpoints, even if\n\
8882 such is available. (However, any hardware watchpoints that were\n\
8883 created before setting this to nonzero, will continue to use watchpoint\n\
8886 show_can_use_hw_watchpoints
,
8887 &setlist
, &showlist
);
8889 can_use_hw_watchpoints
= 1;
8891 /* Tracepoint manipulation commands. */
8893 c
= add_com ("trace", class_breakpoint
, trace_command
, _("\
8894 Set a tracepoint at specified line or function.\n\
8896 BREAK_ARGS_HELP ("trace") "\n\
8897 Do \"help tracepoints\" for info on other tracepoint commands."));
8898 set_cmd_completer (c
, location_completer
);
8900 add_com_alias ("tp", "trace", class_alias
, 0);
8901 add_com_alias ("tr", "trace", class_alias
, 1);
8902 add_com_alias ("tra", "trace", class_alias
, 1);
8903 add_com_alias ("trac", "trace", class_alias
, 1);
8905 add_info ("tracepoints", tracepoints_info
, _("\
8906 Status of tracepoints, or tracepoint number NUMBER.\n\
8907 Convenience variable \"$tpnum\" contains the number of the\n\
8908 last tracepoint set."));
8910 add_info_alias ("tp", "tracepoints", 1);
8912 add_cmd ("tracepoints", class_trace
, delete_trace_command
, _("\
8913 Delete specified tracepoints.\n\
8914 Arguments are tracepoint numbers, separated by spaces.\n\
8915 No argument means delete all tracepoints."),
8918 c
= add_cmd ("tracepoints", class_trace
, disable_trace_command
, _("\
8919 Disable specified tracepoints.\n\
8920 Arguments are tracepoint numbers, separated by spaces.\n\
8921 No argument means disable all tracepoints."),
8923 deprecate_cmd (c
, "disable");
8925 c
= add_cmd ("tracepoints", class_trace
, enable_trace_command
, _("\
8926 Enable specified tracepoints.\n\
8927 Arguments are tracepoint numbers, separated by spaces.\n\
8928 No argument means enable all tracepoints."),
8930 deprecate_cmd (c
, "enable");
8932 add_com ("passcount", class_trace
, trace_pass_command
, _("\
8933 Set the passcount for a tracepoint.\n\
8934 The trace will end when the tracepoint has been passed 'count' times.\n\
8935 Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
8936 if TPNUM is omitted, passcount refers to the last tracepoint defined."));
8938 c
= add_com ("save-tracepoints", class_trace
, tracepoint_save_command
, _("\
8939 Save current tracepoint definitions as a script.\n\
8940 Use the 'source' command in another debug session to restore them."));
8941 set_cmd_completer (c
, filename_completer
);
8943 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8944 Breakpoint specific settings\n\
8945 Configure various breakpoint-specific variables such as\n\
8946 pending breakpoint behavior"),
8947 &breakpoint_set_cmdlist
, "set breakpoint ",
8948 0/*allow-unknown*/, &setlist
);
8949 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8950 Breakpoint specific settings\n\
8951 Configure various breakpoint-specific variables such as\n\
8952 pending breakpoint behavior"),
8953 &breakpoint_show_cmdlist
, "show breakpoint ",
8954 0/*allow-unknown*/, &showlist
);
8956 add_setshow_auto_boolean_cmd ("pending", no_class
,
8957 &pending_break_support
, _("\
8958 Set debugger's behavior regarding pending breakpoints."), _("\
8959 Show debugger's behavior regarding pending breakpoints."), _("\
8960 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8961 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8962 an error. If auto, an unrecognized breakpoint location results in a\n\
8963 user-query to see if a pending breakpoint should be created."),
8965 show_pending_break_support
,
8966 &breakpoint_set_cmdlist
,
8967 &breakpoint_show_cmdlist
);
8969 pending_break_support
= AUTO_BOOLEAN_AUTO
;
8971 add_setshow_boolean_cmd ("auto-hw", no_class
,
8972 &automatic_hardware_breakpoints
, _("\
8973 Set automatic usage of hardware breakpoints."), _("\
8974 Show automatic usage of hardware breakpoints."), _("\
8975 If set, the debugger will automatically use hardware breakpoints for\n\
8976 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
8977 a warning will be emitted for such breakpoints."),
8979 show_automatic_hardware_breakpoints
,
8980 &breakpoint_set_cmdlist
,
8981 &breakpoint_show_cmdlist
);
8983 add_setshow_enum_cmd ("always-inserted", class_support
,
8984 always_inserted_enums
, &always_inserted_mode
, _("\
8985 Set mode for inserting breakpoints."), _("\
8986 Show mode for inserting breakpoints."), _("\
8987 When this mode is off, breakpoints are inserted in inferior when it is\n\
8988 resumed, and removed when execution stops. When this mode is on,\n\
8989 breakpoints are inserted immediately and removed only when the user\n\
8990 deletes the breakpoint. When this mode is auto (which is the default),\n\
8991 the behaviour depends on the non-stop setting (see help set non-stop).\n\
8992 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
8993 behaves as if always-inserted mode is on; if gdb is controlling the\n\
8994 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
8996 &show_always_inserted_mode
,
8997 &breakpoint_set_cmdlist
,
8998 &breakpoint_show_cmdlist
);
9000 automatic_hardware_breakpoints
= 1;
9002 observer_attach_about_to_proceed (breakpoint_about_to_proceed
);