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, 2010, 2011 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/>. */
23 #include "arch-utils.h"
28 #include "breakpoint.h"
29 #include "tracepoint.h"
31 #include "expression.h"
37 #include "gdbthread.h"
40 #include "gdb_string.h"
41 #include "gdb-demangle.h"
42 #include "filenames.h"
48 #include "completer.h"
51 #include "cli/cli-script.h"
52 #include "gdb_assert.h"
57 #include "exceptions.h"
64 #include "xml-syscall.h"
65 #include "parser-defs.h"
66 #include "cli/cli-utils.h"
67 #include "continuations.h"
72 /* readline include files */
73 #include "readline/readline.h"
74 #include "readline/history.h"
76 /* readline defines this. */
79 #include "mi/mi-common.h"
80 #include "python/python.h"
82 /* Prototypes for local functions. */
84 static void enable_delete_command (char *, int);
86 static void enable_once_command (char *, int);
88 static void disable_command (char *, int);
90 static void enable_command (char *, int);
92 static void map_breakpoint_numbers (char *, void (*) (struct breakpoint
*,
96 static void ignore_command (char *, int);
98 static int breakpoint_re_set_one (void *);
100 static void breakpoint_re_set_default (struct breakpoint
*);
102 static void clear_command (char *, int);
104 static void catch_command (char *, int);
106 static int can_use_hardware_watchpoint (struct value
*);
108 static void break_command_1 (char *, int, int);
110 static void mention (struct breakpoint
*);
112 static struct breakpoint
*set_raw_breakpoint_without_location (struct gdbarch
*,
114 const struct breakpoint_ops
*);
115 static struct bp_location
*add_location_to_breakpoint (struct breakpoint
*,
116 const struct symtab_and_line
*);
118 /* This function is used in gdbtk sources and thus can not be made
120 struct breakpoint
*set_raw_breakpoint (struct gdbarch
*gdbarch
,
121 struct symtab_and_line
,
123 const struct breakpoint_ops
*);
125 static struct breakpoint
*
126 momentary_breakpoint_from_master (struct breakpoint
*orig
,
128 const struct breakpoint_ops
*ops
);
130 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
132 static CORE_ADDR
adjust_breakpoint_address (struct gdbarch
*gdbarch
,
136 static void describe_other_breakpoints (struct gdbarch
*,
137 struct program_space
*, CORE_ADDR
,
138 struct obj_section
*, int);
140 static int breakpoint_address_match (struct address_space
*aspace1
,
142 struct address_space
*aspace2
,
145 static int watchpoint_locations_match (struct bp_location
*loc1
,
146 struct bp_location
*loc2
);
148 static int breakpoint_location_address_match (struct bp_location
*bl
,
149 struct address_space
*aspace
,
152 static void breakpoints_info (char *, int);
154 static void watchpoints_info (char *, int);
156 static int breakpoint_1 (char *, int,
157 int (*) (const struct breakpoint
*));
159 static int breakpoint_cond_eval (void *);
161 static void cleanup_executing_breakpoints (void *);
163 static void commands_command (char *, int);
165 static void condition_command (char *, int);
174 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
175 static int remove_breakpoint_1 (struct bp_location
*, insertion_state_t
);
177 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
179 static int watchpoint_check (void *);
181 static void maintenance_info_breakpoints (char *, int);
183 static int hw_breakpoint_used_count (void);
185 static int hw_watchpoint_use_count (struct breakpoint
*);
187 static int hw_watchpoint_used_count_others (struct breakpoint
*except
,
189 int *other_type_used
);
191 static void hbreak_command (char *, int);
193 static void thbreak_command (char *, int);
195 static void enable_breakpoint_disp (struct breakpoint
*, enum bpdisp
);
197 static void stop_command (char *arg
, int from_tty
);
199 static void stopin_command (char *arg
, int from_tty
);
201 static void stopat_command (char *arg
, int from_tty
);
203 static char *ep_parse_optional_if_clause (char **arg
);
205 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
206 char *arg
, int tempflag
, int from_tty
);
208 static void tcatch_command (char *arg
, int from_tty
);
210 static void detach_single_step_breakpoints (void);
212 static int single_step_breakpoint_inserted_here_p (struct address_space
*,
215 static void free_bp_location (struct bp_location
*loc
);
216 static void incref_bp_location (struct bp_location
*loc
);
217 static void decref_bp_location (struct bp_location
**loc
);
219 static struct bp_location
*allocate_bp_location (struct breakpoint
*bpt
);
221 static void update_global_location_list (int);
223 static void update_global_location_list_nothrow (int);
225 static int is_hardware_watchpoint (const struct breakpoint
*bpt
);
227 static void insert_breakpoint_locations (void);
229 static int syscall_catchpoint_p (struct breakpoint
*b
);
231 static void tracepoints_info (char *, int);
233 static void delete_trace_command (char *, int);
235 static void enable_trace_command (char *, int);
237 static void disable_trace_command (char *, int);
239 static void trace_pass_command (char *, int);
241 static int is_masked_watchpoint (const struct breakpoint
*b
);
243 /* Assuming we're creating a static tracepoint, does S look like a
244 static tracepoint marker spec ("-m MARKER_ID")? */
245 #define is_marker_spec(s) \
246 (s != NULL && strncmp (s, "-m", 2) == 0 && ((s)[2] == ' ' || (s)[2] == '\t'))
248 /* The abstract base class all breakpoint_ops structures inherit
250 static struct breakpoint_ops base_breakpoint_ops
;
252 /* The breakpoint_ops structure to be inherited by all breakpoint_ops
253 that are implemented on top of software or hardware breakpoints
254 (user breakpoints, internal and momentary breakpoints, etc.). */
255 static struct breakpoint_ops bkpt_base_breakpoint_ops
;
257 /* Internal breakpoints class type. */
258 static struct breakpoint_ops internal_breakpoint_ops
;
260 /* Momentary breakpoints class type. */
261 static struct breakpoint_ops momentary_breakpoint_ops
;
263 /* The breakpoint_ops structure to be used in regular user created
265 struct breakpoint_ops bkpt_breakpoint_ops
;
267 /* A reference-counted struct command_line. This lets multiple
268 breakpoints share a single command list. */
269 struct counted_command_line
271 /* The reference count. */
274 /* The command list. */
275 struct command_line
*commands
;
278 struct command_line
*
279 breakpoint_commands (struct breakpoint
*b
)
281 return b
->commands
? b
->commands
->commands
: NULL
;
284 /* Flag indicating that a command has proceeded the inferior past the
285 current breakpoint. */
287 static int breakpoint_proceeded
;
290 bpdisp_text (enum bpdisp disp
)
292 /* NOTE: the following values are a part of MI protocol and
293 represent values of 'disp' field returned when inferior stops at
295 static const char * const bpdisps
[] = {"del", "dstp", "dis", "keep"};
297 return bpdisps
[(int) disp
];
300 /* Prototypes for exported functions. */
301 /* If FALSE, gdb will not use hardware support for watchpoints, even
302 if such is available. */
303 static int can_use_hw_watchpoints
;
306 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
307 struct cmd_list_element
*c
,
310 fprintf_filtered (file
,
311 _("Debugger's willingness to use "
312 "watchpoint hardware is %s.\n"),
316 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
317 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
318 for unrecognized breakpoint locations.
319 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
320 static enum auto_boolean pending_break_support
;
322 show_pending_break_support (struct ui_file
*file
, int from_tty
,
323 struct cmd_list_element
*c
,
326 fprintf_filtered (file
,
327 _("Debugger's behavior regarding "
328 "pending breakpoints is %s.\n"),
332 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
333 set with "break" but falling in read-only memory.
334 If 0, gdb will warn about such breakpoints, but won't automatically
335 use hardware breakpoints. */
336 static int automatic_hardware_breakpoints
;
338 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
339 struct cmd_list_element
*c
,
342 fprintf_filtered (file
,
343 _("Automatic usage of hardware breakpoints is %s.\n"),
347 /* If on, gdb will keep breakpoints inserted even as inferior is
348 stopped, and immediately insert any new breakpoints. If off, gdb
349 will insert breakpoints into inferior only when resuming it, and
350 will remove breakpoints upon stop. If auto, GDB will behave as ON
351 if in non-stop mode, and as OFF if all-stop mode.*/
353 static const char always_inserted_auto
[] = "auto";
354 static const char always_inserted_on
[] = "on";
355 static const char always_inserted_off
[] = "off";
356 static const char *always_inserted_enums
[] = {
357 always_inserted_auto
,
362 static const char *always_inserted_mode
= always_inserted_auto
;
364 show_always_inserted_mode (struct ui_file
*file
, int from_tty
,
365 struct cmd_list_element
*c
, const char *value
)
367 if (always_inserted_mode
== always_inserted_auto
)
368 fprintf_filtered (file
,
369 _("Always inserted breakpoint "
370 "mode is %s (currently %s).\n"),
372 breakpoints_always_inserted_mode () ? "on" : "off");
374 fprintf_filtered (file
, _("Always inserted breakpoint mode is %s.\n"),
379 breakpoints_always_inserted_mode (void)
381 return ((always_inserted_mode
== always_inserted_on
382 || (always_inserted_mode
== always_inserted_auto
&& non_stop
))
386 void _initialize_breakpoint (void);
388 /* Are we executing breakpoint commands? */
389 static int executing_breakpoint_commands
;
391 /* Are overlay event breakpoints enabled? */
392 static int overlay_events_enabled
;
394 /* See description in breakpoint.h. */
395 int target_exact_watchpoints
= 0;
397 /* Walk the following statement or block through all breakpoints.
398 ALL_BREAKPOINTS_SAFE does so even if the statement deletes the
399 current breakpoint. */
401 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
403 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
404 for (B = breakpoint_chain; \
405 B ? (TMP=B->next, 1): 0; \
408 /* Similar iterator for the low-level breakpoints. SAFE variant is
409 not provided so update_global_location_list must not be called
410 while executing the block of ALL_BP_LOCATIONS. */
412 #define ALL_BP_LOCATIONS(B,BP_TMP) \
413 for (BP_TMP = bp_location; \
414 BP_TMP < bp_location + bp_location_count && (B = *BP_TMP); \
417 /* Iterator for tracepoints only. */
419 #define ALL_TRACEPOINTS(B) \
420 for (B = breakpoint_chain; B; B = B->next) \
421 if (is_tracepoint (B))
423 /* Chains of all breakpoints defined. */
425 struct breakpoint
*breakpoint_chain
;
427 /* Array is sorted by bp_location_compare - primarily by the ADDRESS. */
429 static struct bp_location
**bp_location
;
431 /* Number of elements of BP_LOCATION. */
433 static unsigned bp_location_count
;
435 /* Maximum alignment offset between bp_target_info.PLACED_ADDRESS and
436 ADDRESS for the current elements of BP_LOCATION which get a valid
437 result from bp_location_has_shadow. You can use it for roughly
438 limiting the subrange of BP_LOCATION to scan for shadow bytes for
439 an address you need to read. */
441 static CORE_ADDR bp_location_placed_address_before_address_max
;
443 /* Maximum offset plus alignment between bp_target_info.PLACED_ADDRESS
444 + bp_target_info.SHADOW_LEN and ADDRESS for the current elements of
445 BP_LOCATION which get a valid result from bp_location_has_shadow.
446 You can use it for roughly limiting the subrange of BP_LOCATION to
447 scan for shadow bytes for an address you need to read. */
449 static CORE_ADDR bp_location_shadow_len_after_address_max
;
451 /* The locations that no longer correspond to any breakpoint, unlinked
452 from bp_location array, but for which a hit may still be reported
454 VEC(bp_location_p
) *moribund_locations
= NULL
;
456 /* Number of last breakpoint made. */
458 static int breakpoint_count
;
460 /* The value of `breakpoint_count' before the last command that
461 created breakpoints. If the last (break-like) command created more
462 than one breakpoint, then the difference between BREAKPOINT_COUNT
463 and PREV_BREAKPOINT_COUNT is more than one. */
464 static int prev_breakpoint_count
;
466 /* Number of last tracepoint made. */
468 static int tracepoint_count
;
470 static struct cmd_list_element
*breakpoint_set_cmdlist
;
471 static struct cmd_list_element
*breakpoint_show_cmdlist
;
472 struct cmd_list_element
*save_cmdlist
;
474 /* Return whether a breakpoint is an active enabled breakpoint. */
476 breakpoint_enabled (struct breakpoint
*b
)
478 return (b
->enable_state
== bp_enabled
);
481 /* Set breakpoint count to NUM. */
484 set_breakpoint_count (int num
)
486 prev_breakpoint_count
= breakpoint_count
;
487 breakpoint_count
= num
;
488 set_internalvar_integer (lookup_internalvar ("bpnum"), num
);
491 /* Used by `start_rbreak_breakpoints' below, to record the current
492 breakpoint count before "rbreak" creates any breakpoint. */
493 static int rbreak_start_breakpoint_count
;
495 /* Called at the start an "rbreak" command to record the first
499 start_rbreak_breakpoints (void)
501 rbreak_start_breakpoint_count
= breakpoint_count
;
504 /* Called at the end of an "rbreak" command to record the last
508 end_rbreak_breakpoints (void)
510 prev_breakpoint_count
= rbreak_start_breakpoint_count
;
513 /* Used in run_command to zero the hit count when a new run starts. */
516 clear_breakpoint_hit_counts (void)
518 struct breakpoint
*b
;
524 /* Allocate a new counted_command_line with reference count of 1.
525 The new structure owns COMMANDS. */
527 static struct counted_command_line
*
528 alloc_counted_command_line (struct command_line
*commands
)
530 struct counted_command_line
*result
531 = xmalloc (sizeof (struct counted_command_line
));
534 result
->commands
= commands
;
538 /* Increment reference count. This does nothing if CMD is NULL. */
541 incref_counted_command_line (struct counted_command_line
*cmd
)
547 /* Decrement reference count. If the reference count reaches 0,
548 destroy the counted_command_line. Sets *CMDP to NULL. This does
549 nothing if *CMDP is NULL. */
552 decref_counted_command_line (struct counted_command_line
**cmdp
)
556 if (--(*cmdp
)->refc
== 0)
558 free_command_lines (&(*cmdp
)->commands
);
565 /* A cleanup function that calls decref_counted_command_line. */
568 do_cleanup_counted_command_line (void *arg
)
570 decref_counted_command_line (arg
);
573 /* Create a cleanup that calls decref_counted_command_line on the
576 static struct cleanup
*
577 make_cleanup_decref_counted_command_line (struct counted_command_line
**cmdp
)
579 return make_cleanup (do_cleanup_counted_command_line
, cmdp
);
583 /* Return the breakpoint with the specified number, or NULL
584 if the number does not refer to an existing breakpoint. */
587 get_breakpoint (int num
)
589 struct breakpoint
*b
;
592 if (b
->number
== num
)
601 set_breakpoint_condition (struct breakpoint
*b
, char *exp
,
604 xfree (b
->cond_string
);
605 b
->cond_string
= NULL
;
607 if (is_watchpoint (b
))
609 struct watchpoint
*w
= (struct watchpoint
*) b
;
616 struct bp_location
*loc
;
618 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
628 printf_filtered (_("Breakpoint %d now unconditional.\n"), b
->number
);
634 /* I don't know if it matters whether this is the string the user
635 typed in or the decompiled expression. */
636 b
->cond_string
= xstrdup (arg
);
637 b
->condition_not_parsed
= 0;
639 if (is_watchpoint (b
))
641 struct watchpoint
*w
= (struct watchpoint
*) b
;
643 innermost_block
= NULL
;
645 w
->cond_exp
= parse_exp_1 (&arg
, 0, 0);
647 error (_("Junk at end of expression"));
648 w
->cond_exp_valid_block
= innermost_block
;
652 struct bp_location
*loc
;
654 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
658 parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
660 error (_("Junk at end of expression"));
664 breakpoints_changed ();
665 observer_notify_breakpoint_modified (b
);
668 /* condition N EXP -- set break condition of breakpoint N to EXP. */
671 condition_command (char *arg
, int from_tty
)
673 struct breakpoint
*b
;
678 error_no_arg (_("breakpoint number"));
681 bnum
= get_number (&p
);
683 error (_("Bad breakpoint argument: '%s'"), arg
);
686 if (b
->number
== bnum
)
688 /* Check if this breakpoint has a Python object assigned to
689 it, and if it has a definition of the "stop"
690 method. This method and conditions entered into GDB from
691 the CLI are mutually exclusive. */
693 && gdbpy_breakpoint_has_py_cond (b
->py_bp_object
))
694 error (_("Cannot set a condition where a Python 'stop' "
695 "method has been defined in the breakpoint."));
696 set_breakpoint_condition (b
, p
, from_tty
);
700 error (_("No breakpoint number %d."), bnum
);
703 /* Check that COMMAND do not contain commands that are suitable
704 only for tracepoints and not suitable for ordinary breakpoints.
705 Throw if any such commands is found. */
708 check_no_tracepoint_commands (struct command_line
*commands
)
710 struct command_line
*c
;
712 for (c
= commands
; c
; c
= c
->next
)
716 if (c
->control_type
== while_stepping_control
)
717 error (_("The 'while-stepping' command can "
718 "only be used for tracepoints"));
720 for (i
= 0; i
< c
->body_count
; ++i
)
721 check_no_tracepoint_commands ((c
->body_list
)[i
]);
723 /* Not that command parsing removes leading whitespace and comment
724 lines and also empty lines. So, we only need to check for
726 if (strstr (c
->line
, "collect ") == c
->line
)
727 error (_("The 'collect' command can only be used for tracepoints"));
729 if (strstr (c
->line
, "teval ") == c
->line
)
730 error (_("The 'teval' command can only be used for tracepoints"));
734 /* Encapsulate tests for different types of tracepoints. */
737 is_tracepoint_type (enum bptype type
)
739 return (type
== bp_tracepoint
740 || type
== bp_fast_tracepoint
741 || type
== bp_static_tracepoint
);
745 is_tracepoint (const struct breakpoint
*b
)
747 return is_tracepoint_type (b
->type
);
750 /* A helper function that validates that COMMANDS are valid for a
751 breakpoint. This function will throw an exception if a problem is
755 validate_commands_for_breakpoint (struct breakpoint
*b
,
756 struct command_line
*commands
)
758 if (is_tracepoint (b
))
760 /* We need to verify that each top-level element of commands is
761 valid for tracepoints, that there's at most one
762 while-stepping element, and that while-stepping's body has
763 valid tracing commands excluding nested while-stepping. */
764 struct command_line
*c
;
765 struct command_line
*while_stepping
= 0;
766 for (c
= commands
; c
; c
= c
->next
)
768 if (c
->control_type
== while_stepping_control
)
770 if (b
->type
== bp_fast_tracepoint
)
771 error (_("The 'while-stepping' command "
772 "cannot be used for fast tracepoint"));
773 else if (b
->type
== bp_static_tracepoint
)
774 error (_("The 'while-stepping' command "
775 "cannot be used for static tracepoint"));
778 error (_("The 'while-stepping' command "
779 "can be used only once"));
786 struct command_line
*c2
;
788 gdb_assert (while_stepping
->body_count
== 1);
789 c2
= while_stepping
->body_list
[0];
790 for (; c2
; c2
= c2
->next
)
792 if (c2
->control_type
== while_stepping_control
)
793 error (_("The 'while-stepping' command cannot be nested"));
799 check_no_tracepoint_commands (commands
);
803 /* Return a vector of all the static tracepoints set at ADDR. The
804 caller is responsible for releasing the vector. */
807 static_tracepoints_here (CORE_ADDR addr
)
809 struct breakpoint
*b
;
810 VEC(breakpoint_p
) *found
= 0;
811 struct bp_location
*loc
;
814 if (b
->type
== bp_static_tracepoint
)
816 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
817 if (loc
->address
== addr
)
818 VEC_safe_push(breakpoint_p
, found
, b
);
824 /* Set the command list of B to COMMANDS. If breakpoint is tracepoint,
825 validate that only allowed commands are included. */
828 breakpoint_set_commands (struct breakpoint
*b
,
829 struct command_line
*commands
)
831 validate_commands_for_breakpoint (b
, commands
);
833 decref_counted_command_line (&b
->commands
);
834 b
->commands
= alloc_counted_command_line (commands
);
835 breakpoints_changed ();
836 observer_notify_breakpoint_modified (b
);
839 /* Set the internal `silent' flag on the breakpoint. Note that this
840 is not the same as the "silent" that may appear in the breakpoint's
844 breakpoint_set_silent (struct breakpoint
*b
, int silent
)
846 int old_silent
= b
->silent
;
849 if (old_silent
!= silent
)
850 observer_notify_breakpoint_modified (b
);
853 /* Set the thread for this breakpoint. If THREAD is -1, make the
854 breakpoint work for any thread. */
857 breakpoint_set_thread (struct breakpoint
*b
, int thread
)
859 int old_thread
= b
->thread
;
862 if (old_thread
!= thread
)
863 observer_notify_breakpoint_modified (b
);
866 /* Set the task for this breakpoint. If TASK is 0, make the
867 breakpoint work for any task. */
870 breakpoint_set_task (struct breakpoint
*b
, int task
)
872 int old_task
= b
->task
;
875 if (old_task
!= task
)
876 observer_notify_breakpoint_modified (b
);
880 check_tracepoint_command (char *line
, void *closure
)
882 struct breakpoint
*b
= closure
;
884 validate_actionline (&line
, b
);
887 /* A structure used to pass information through
888 map_breakpoint_numbers. */
892 /* True if the command was typed at a tty. */
895 /* The breakpoint range spec. */
898 /* Non-NULL if the body of the commands are being read from this
899 already-parsed command. */
900 struct command_line
*control
;
902 /* The command lines read from the user, or NULL if they have not
904 struct counted_command_line
*cmd
;
907 /* A callback for map_breakpoint_numbers that sets the commands for
911 do_map_commands_command (struct breakpoint
*b
, void *data
)
913 struct commands_info
*info
= data
;
915 if (info
->cmd
== NULL
)
917 struct command_line
*l
;
919 if (info
->control
!= NULL
)
920 l
= copy_command_lines (info
->control
->body_list
[0]);
923 struct cleanup
*old_chain
;
926 str
= xstrprintf (_("Type commands for breakpoint(s) "
927 "%s, one per line."),
930 old_chain
= make_cleanup (xfree
, str
);
932 l
= read_command_lines (str
,
935 ? check_tracepoint_command
: 0),
938 do_cleanups (old_chain
);
941 info
->cmd
= alloc_counted_command_line (l
);
944 /* If a breakpoint was on the list more than once, we don't need to
946 if (b
->commands
!= info
->cmd
)
948 validate_commands_for_breakpoint (b
, info
->cmd
->commands
);
949 incref_counted_command_line (info
->cmd
);
950 decref_counted_command_line (&b
->commands
);
951 b
->commands
= info
->cmd
;
952 breakpoints_changed ();
953 observer_notify_breakpoint_modified (b
);
958 commands_command_1 (char *arg
, int from_tty
,
959 struct command_line
*control
)
961 struct cleanup
*cleanups
;
962 struct commands_info info
;
964 info
.from_tty
= from_tty
;
965 info
.control
= control
;
967 /* If we read command lines from the user, then `info' will hold an
968 extra reference to the commands that we must clean up. */
969 cleanups
= make_cleanup_decref_counted_command_line (&info
.cmd
);
971 if (arg
== NULL
|| !*arg
)
973 if (breakpoint_count
- prev_breakpoint_count
> 1)
974 arg
= xstrprintf ("%d-%d", prev_breakpoint_count
+ 1,
976 else if (breakpoint_count
> 0)
977 arg
= xstrprintf ("%d", breakpoint_count
);
980 /* So that we don't try to free the incoming non-NULL
981 argument in the cleanup below. Mapping breakpoint
982 numbers will fail in this case. */
987 /* The command loop has some static state, so we need to preserve
992 make_cleanup (xfree
, arg
);
996 map_breakpoint_numbers (arg
, do_map_commands_command
, &info
);
998 if (info
.cmd
== NULL
)
999 error (_("No breakpoints specified."));
1001 do_cleanups (cleanups
);
1005 commands_command (char *arg
, int from_tty
)
1007 commands_command_1 (arg
, from_tty
, NULL
);
1010 /* Like commands_command, but instead of reading the commands from
1011 input stream, takes them from an already parsed command structure.
1013 This is used by cli-script.c to DTRT with breakpoint commands
1014 that are part of if and while bodies. */
1015 enum command_control_type
1016 commands_from_control_command (char *arg
, struct command_line
*cmd
)
1018 commands_command_1 (arg
, 0, cmd
);
1019 return simple_control
;
1022 /* Return non-zero if BL->TARGET_INFO contains valid information. */
1025 bp_location_has_shadow (struct bp_location
*bl
)
1027 if (bl
->loc_type
!= bp_loc_software_breakpoint
)
1031 if (bl
->target_info
.shadow_len
== 0)
1032 /* BL isn't valid, or doesn't shadow memory. */
1037 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
1038 by replacing any memory breakpoints with their shadowed contents.
1040 The range of shadowed area by each bp_location is:
1041 bl->address - bp_location_placed_address_before_address_max
1042 up to bl->address + bp_location_shadow_len_after_address_max
1043 The range we were requested to resolve shadows for is:
1044 memaddr ... memaddr + len
1045 Thus the safe cutoff boundaries for performance optimization are
1046 memaddr + len <= (bl->address
1047 - bp_location_placed_address_before_address_max)
1049 bl->address + bp_location_shadow_len_after_address_max <= memaddr */
1052 breakpoint_xfer_memory (gdb_byte
*readbuf
, gdb_byte
*writebuf
,
1053 const gdb_byte
*writebuf_org
,
1054 ULONGEST memaddr
, LONGEST len
)
1056 /* Left boundary, right boundary and median element of our binary
1058 unsigned bc_l
, bc_r
, bc
;
1060 /* Find BC_L which is a leftmost element which may affect BUF
1061 content. It is safe to report lower value but a failure to
1062 report higher one. */
1065 bc_r
= bp_location_count
;
1066 while (bc_l
+ 1 < bc_r
)
1068 struct bp_location
*bl
;
1070 bc
= (bc_l
+ bc_r
) / 2;
1071 bl
= bp_location
[bc
];
1073 /* Check first BL->ADDRESS will not overflow due to the added
1074 constant. Then advance the left boundary only if we are sure
1075 the BC element can in no way affect the BUF content (MEMADDR
1076 to MEMADDR + LEN range).
1078 Use the BP_LOCATION_SHADOW_LEN_AFTER_ADDRESS_MAX safety
1079 offset so that we cannot miss a breakpoint with its shadow
1080 range tail still reaching MEMADDR. */
1082 if ((bl
->address
+ bp_location_shadow_len_after_address_max
1084 && (bl
->address
+ bp_location_shadow_len_after_address_max
1091 /* Due to the binary search above, we need to make sure we pick the
1092 first location that's at BC_L's address. E.g., if there are
1093 multiple locations at the same address, BC_L may end up pointing
1094 at a duplicate location, and miss the "master"/"inserted"
1095 location. Say, given locations L1, L2 and L3 at addresses A and
1098 L1@A, L2@A, L3@B, ...
1100 BC_L could end up pointing at location L2, while the "master"
1101 location could be L1. Since the `loc->inserted' flag is only set
1102 on "master" locations, we'd forget to restore the shadow of L1
1105 && bp_location
[bc_l
]->address
== bp_location
[bc_l
- 1]->address
)
1108 /* Now do full processing of the found relevant range of elements. */
1110 for (bc
= bc_l
; bc
< bp_location_count
; bc
++)
1112 struct bp_location
*bl
= bp_location
[bc
];
1113 CORE_ADDR bp_addr
= 0;
1117 /* bp_location array has BL->OWNER always non-NULL. */
1118 if (bl
->owner
->type
== bp_none
)
1119 warning (_("reading through apparently deleted breakpoint #%d?"),
1122 /* Performance optimization: any further element can no longer affect BUF
1125 if (bl
->address
>= bp_location_placed_address_before_address_max
1126 && memaddr
+ len
<= (bl
->address
1127 - bp_location_placed_address_before_address_max
))
1130 if (!bp_location_has_shadow (bl
))
1132 if (!breakpoint_address_match (bl
->target_info
.placed_address_space
, 0,
1133 current_program_space
->aspace
, 0))
1136 /* Addresses and length of the part of the breakpoint that
1138 bp_addr
= bl
->target_info
.placed_address
;
1139 bp_size
= bl
->target_info
.shadow_len
;
1141 if (bp_addr
+ bp_size
<= memaddr
)
1142 /* The breakpoint is entirely before the chunk of memory we
1146 if (bp_addr
>= memaddr
+ len
)
1147 /* The breakpoint is entirely after the chunk of memory we are
1151 /* Offset within shadow_contents. */
1152 if (bp_addr
< memaddr
)
1154 /* Only copy the second part of the breakpoint. */
1155 bp_size
-= memaddr
- bp_addr
;
1156 bptoffset
= memaddr
- bp_addr
;
1160 if (bp_addr
+ bp_size
> memaddr
+ len
)
1162 /* Only copy the first part of the breakpoint. */
1163 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
1166 if (readbuf
!= NULL
)
1168 /* Update the read buffer with this inserted breakpoint's
1170 memcpy (readbuf
+ bp_addr
- memaddr
,
1171 bl
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
1175 struct gdbarch
*gdbarch
= bl
->gdbarch
;
1176 const unsigned char *bp
;
1177 CORE_ADDR placed_address
= bl
->target_info
.placed_address
;
1178 unsigned placed_size
= bl
->target_info
.placed_size
;
1180 /* Update the shadow with what we want to write to memory. */
1181 memcpy (bl
->target_info
.shadow_contents
+ bptoffset
,
1182 writebuf_org
+ bp_addr
- memaddr
, bp_size
);
1184 /* Determine appropriate breakpoint contents and size for this
1186 bp
= gdbarch_breakpoint_from_pc (gdbarch
, &placed_address
, &placed_size
);
1188 /* Update the final write buffer with this inserted
1189 breakpoint's INSN. */
1190 memcpy (writebuf
+ bp_addr
- memaddr
, bp
+ bptoffset
, bp_size
);
1196 /* Return true if BPT is of any hardware watchpoint kind. */
1199 is_hardware_watchpoint (const struct breakpoint
*bpt
)
1201 return (bpt
->type
== bp_hardware_watchpoint
1202 || bpt
->type
== bp_read_watchpoint
1203 || bpt
->type
== bp_access_watchpoint
);
1206 /* Return true if BPT is of any watchpoint kind, hardware or
1210 is_watchpoint (const struct breakpoint
*bpt
)
1212 return (is_hardware_watchpoint (bpt
)
1213 || bpt
->type
== bp_watchpoint
);
1216 /* Returns true if the current thread and its running state are safe
1217 to evaluate or update watchpoint B. Watchpoints on local
1218 expressions need to be evaluated in the context of the thread that
1219 was current when the watchpoint was created, and, that thread needs
1220 to be stopped to be able to select the correct frame context.
1221 Watchpoints on global expressions can be evaluated on any thread,
1222 and in any state. It is presently left to the target allowing
1223 memory accesses when threads are running. */
1226 watchpoint_in_thread_scope (struct watchpoint
*b
)
1228 return (ptid_equal (b
->watchpoint_thread
, null_ptid
)
1229 || (ptid_equal (inferior_ptid
, b
->watchpoint_thread
)
1230 && !is_executing (inferior_ptid
)));
1233 /* Set watchpoint B to disp_del_at_next_stop, even including its possible
1234 associated bp_watchpoint_scope breakpoint. */
1237 watchpoint_del_at_next_stop (struct watchpoint
*w
)
1239 struct breakpoint
*b
= &w
->base
;
1241 if (b
->related_breakpoint
!= b
)
1243 gdb_assert (b
->related_breakpoint
->type
== bp_watchpoint_scope
);
1244 gdb_assert (b
->related_breakpoint
->related_breakpoint
== b
);
1245 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1246 b
->related_breakpoint
->related_breakpoint
= b
->related_breakpoint
;
1247 b
->related_breakpoint
= b
;
1249 b
->disposition
= disp_del_at_next_stop
;
1252 /* Assuming that B is a watchpoint:
1253 - Reparse watchpoint expression, if REPARSE is non-zero
1254 - Evaluate expression and store the result in B->val
1255 - Evaluate the condition if there is one, and store the result
1257 - Update the list of values that must be watched in B->loc.
1259 If the watchpoint disposition is disp_del_at_next_stop, then do
1260 nothing. If this is local watchpoint that is out of scope, delete
1263 Even with `set breakpoint always-inserted on' the watchpoints are
1264 removed + inserted on each stop here. Normal breakpoints must
1265 never be removed because they might be missed by a running thread
1266 when debugging in non-stop mode. On the other hand, hardware
1267 watchpoints (is_hardware_watchpoint; processed here) are specific
1268 to each LWP since they are stored in each LWP's hardware debug
1269 registers. Therefore, such LWP must be stopped first in order to
1270 be able to modify its hardware watchpoints.
1272 Hardware watchpoints must be reset exactly once after being
1273 presented to the user. It cannot be done sooner, because it would
1274 reset the data used to present the watchpoint hit to the user. And
1275 it must not be done later because it could display the same single
1276 watchpoint hit during multiple GDB stops. Note that the latter is
1277 relevant only to the hardware watchpoint types bp_read_watchpoint
1278 and bp_access_watchpoint. False hit by bp_hardware_watchpoint is
1279 not user-visible - its hit is suppressed if the memory content has
1282 The following constraints influence the location where we can reset
1283 hardware watchpoints:
1285 * target_stopped_by_watchpoint and target_stopped_data_address are
1286 called several times when GDB stops.
1289 * Multiple hardware watchpoints can be hit at the same time,
1290 causing GDB to stop. GDB only presents one hardware watchpoint
1291 hit at a time as the reason for stopping, and all the other hits
1292 are presented later, one after the other, each time the user
1293 requests the execution to be resumed. Execution is not resumed
1294 for the threads still having pending hit event stored in
1295 LWP_INFO->STATUS. While the watchpoint is already removed from
1296 the inferior on the first stop the thread hit event is kept being
1297 reported from its cached value by linux_nat_stopped_data_address
1298 until the real thread resume happens after the watchpoint gets
1299 presented and thus its LWP_INFO->STATUS gets reset.
1301 Therefore the hardware watchpoint hit can get safely reset on the
1302 watchpoint removal from inferior. */
1305 update_watchpoint (struct watchpoint
*b
, int reparse
)
1307 int within_current_scope
;
1308 struct frame_id saved_frame_id
;
1311 /* If this is a local watchpoint, we only want to check if the
1312 watchpoint frame is in scope if the current thread is the thread
1313 that was used to create the watchpoint. */
1314 if (!watchpoint_in_thread_scope (b
))
1317 if (b
->base
.disposition
== disp_del_at_next_stop
)
1322 /* Determine if the watchpoint is within scope. */
1323 if (b
->exp_valid_block
== NULL
)
1324 within_current_scope
= 1;
1327 struct frame_info
*fi
= get_current_frame ();
1328 struct gdbarch
*frame_arch
= get_frame_arch (fi
);
1329 CORE_ADDR frame_pc
= get_frame_pc (fi
);
1331 /* If we're in a function epilogue, unwinding may not work
1332 properly, so do not attempt to recreate locations at this
1333 point. See similar comments in watchpoint_check. */
1334 if (gdbarch_in_function_epilogue_p (frame_arch
, frame_pc
))
1337 /* Save the current frame's ID so we can restore it after
1338 evaluating the watchpoint expression on its own frame. */
1339 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
1340 took a frame parameter, so that we didn't have to change the
1343 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
1345 fi
= frame_find_by_id (b
->watchpoint_frame
);
1346 within_current_scope
= (fi
!= NULL
);
1347 if (within_current_scope
)
1351 /* We don't free locations. They are stored in the bp_location array
1352 and update_global_location_list will eventually delete them and
1353 remove breakpoints if needed. */
1356 if (within_current_scope
&& reparse
)
1365 s
= b
->exp_string_reparse
? b
->exp_string_reparse
: b
->exp_string
;
1366 b
->exp
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
1367 /* If the meaning of expression itself changed, the old value is
1368 no longer relevant. We don't want to report a watchpoint hit
1369 to the user when the old value and the new value may actually
1370 be completely different objects. */
1371 value_free (b
->val
);
1375 /* Note that unlike with breakpoints, the watchpoint's condition
1376 expression is stored in the breakpoint object, not in the
1377 locations (re)created below. */
1378 if (b
->base
.cond_string
!= NULL
)
1380 if (b
->cond_exp
!= NULL
)
1382 xfree (b
->cond_exp
);
1386 s
= b
->base
.cond_string
;
1387 b
->cond_exp
= parse_exp_1 (&s
, b
->cond_exp_valid_block
, 0);
1391 /* If we failed to parse the expression, for example because
1392 it refers to a global variable in a not-yet-loaded shared library,
1393 don't try to insert watchpoint. We don't automatically delete
1394 such watchpoint, though, since failure to parse expression
1395 is different from out-of-scope watchpoint. */
1396 if ( !target_has_execution
)
1398 /* Without execution, memory can't change. No use to try and
1399 set watchpoint locations. The watchpoint will be reset when
1400 the target gains execution, through breakpoint_re_set. */
1402 else if (within_current_scope
&& b
->exp
)
1405 struct value
*val_chain
, *v
, *result
, *next
;
1406 struct program_space
*frame_pspace
;
1408 fetch_subexp_value (b
->exp
, &pc
, &v
, &result
, &val_chain
);
1410 /* Avoid setting b->val if it's already set. The meaning of
1411 b->val is 'the last value' user saw, and we should update
1412 it only if we reported that last value to user. As it
1413 happens, the code that reports it updates b->val directly.
1414 We don't keep track of the memory value for masked
1416 if (!b
->val_valid
&& !is_masked_watchpoint (&b
->base
))
1422 frame_pspace
= get_frame_program_space (get_selected_frame (NULL
));
1424 /* Look at each value on the value chain. */
1425 for (v
= val_chain
; v
; v
= value_next (v
))
1427 /* If it's a memory location, and GDB actually needed
1428 its contents to evaluate the expression, then we
1429 must watch it. If the first value returned is
1430 still lazy, that means an error occurred reading it;
1431 watch it anyway in case it becomes readable. */
1432 if (VALUE_LVAL (v
) == lval_memory
1433 && (v
== val_chain
|| ! value_lazy (v
)))
1435 struct type
*vtype
= check_typedef (value_type (v
));
1437 /* We only watch structs and arrays if user asked
1438 for it explicitly, never if they just happen to
1439 appear in the middle of some value chain. */
1441 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1442 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1446 struct bp_location
*loc
, **tmp
;
1448 addr
= value_address (v
);
1449 len
= TYPE_LENGTH (value_type (v
));
1451 if (b
->base
.type
== bp_read_watchpoint
)
1453 else if (b
->base
.type
== bp_access_watchpoint
)
1456 loc
= allocate_bp_location (&b
->base
);
1457 for (tmp
= &(b
->base
.loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
1460 loc
->gdbarch
= get_type_arch (value_type (v
));
1462 loc
->pspace
= frame_pspace
;
1463 loc
->address
= addr
;
1465 loc
->watchpoint_type
= type
;
1470 /* Change the type of breakpoint between hardware assisted or
1471 an ordinary watchpoint depending on the hardware support
1472 and free hardware slots. REPARSE is set when the inferior
1477 enum bp_loc_type loc_type
;
1478 struct bp_location
*bl
;
1480 reg_cnt
= can_use_hardware_watchpoint (val_chain
);
1484 int i
, target_resources_ok
, other_type_used
;
1487 /* Use an exact watchpoint when there's only one memory region to be
1488 watched, and only one debug register is needed to watch it. */
1489 b
->exact
= target_exact_watchpoints
&& reg_cnt
== 1;
1491 /* We need to determine how many resources are already
1492 used for all other hardware watchpoints plus this one
1493 to see if we still have enough resources to also fit
1494 this watchpoint in as well. */
1496 /* If this is a software watchpoint, we try to turn it
1497 to a hardware one -- count resources as if B was of
1498 hardware watchpoint type. */
1499 type
= b
->base
.type
;
1500 if (type
== bp_watchpoint
)
1501 type
= bp_hardware_watchpoint
;
1503 /* This watchpoint may or may not have been placed on
1504 the list yet at this point (it won't be in the list
1505 if we're trying to create it for the first time,
1506 through watch_command), so always account for it
1509 /* Count resources used by all watchpoints except B. */
1510 i
= hw_watchpoint_used_count_others (&b
->base
, type
, &other_type_used
);
1512 /* Add in the resources needed for B. */
1513 i
+= hw_watchpoint_use_count (&b
->base
);
1516 = target_can_use_hardware_watchpoint (type
, i
, other_type_used
);
1517 if (target_resources_ok
<= 0)
1519 int sw_mode
= b
->base
.ops
->works_in_software_mode (&b
->base
);
1521 if (target_resources_ok
== 0 && !sw_mode
)
1522 error (_("Target does not support this type of "
1523 "hardware watchpoint."));
1524 else if (target_resources_ok
< 0 && !sw_mode
)
1525 error (_("There are not enough available hardware "
1526 "resources for this watchpoint."));
1528 /* Downgrade to software watchpoint. */
1529 b
->base
.type
= bp_watchpoint
;
1533 /* If this was a software watchpoint, we've just
1534 found we have enough resources to turn it to a
1535 hardware watchpoint. Otherwise, this is a
1537 b
->base
.type
= type
;
1540 else if (!b
->base
.ops
->works_in_software_mode (&b
->base
))
1541 error (_("Expression cannot be implemented with "
1542 "read/access watchpoint."));
1544 b
->base
.type
= bp_watchpoint
;
1546 loc_type
= (b
->base
.type
== bp_watchpoint
? bp_loc_other
1547 : bp_loc_hardware_watchpoint
);
1548 for (bl
= b
->base
.loc
; bl
; bl
= bl
->next
)
1549 bl
->loc_type
= loc_type
;
1552 for (v
= val_chain
; v
; v
= next
)
1554 next
= value_next (v
);
1559 /* If a software watchpoint is not watching any memory, then the
1560 above left it without any location set up. But,
1561 bpstat_stop_status requires a location to be able to report
1562 stops, so make sure there's at least a dummy one. */
1563 if (b
->base
.type
== bp_watchpoint
&& b
->base
.loc
== NULL
)
1565 struct breakpoint
*base
= &b
->base
;
1566 base
->loc
= allocate_bp_location (base
);
1567 base
->loc
->pspace
= frame_pspace
;
1568 base
->loc
->address
= -1;
1569 base
->loc
->length
= -1;
1570 base
->loc
->watchpoint_type
= -1;
1573 else if (!within_current_scope
)
1575 printf_filtered (_("\
1576 Watchpoint %d deleted because the program has left the block\n\
1577 in which its expression is valid.\n"),
1579 watchpoint_del_at_next_stop (b
);
1582 /* Restore the selected frame. */
1584 select_frame (frame_find_by_id (saved_frame_id
));
1588 /* Returns 1 iff breakpoint location should be
1589 inserted in the inferior. We don't differentiate the type of BL's owner
1590 (breakpoint vs. tracepoint), although insert_location in tracepoint's
1591 breakpoint_ops is not defined, because in insert_bp_location,
1592 tracepoint's insert_location will not be called. */
1594 should_be_inserted (struct bp_location
*bl
)
1596 if (bl
->owner
== NULL
|| !breakpoint_enabled (bl
->owner
))
1599 if (bl
->owner
->disposition
== disp_del_at_next_stop
)
1602 if (!bl
->enabled
|| bl
->shlib_disabled
|| bl
->duplicate
)
1605 if (user_breakpoint_p (bl
->owner
) && bl
->pspace
->executing_startup
)
1608 /* This is set for example, when we're attached to the parent of a
1609 vfork, and have detached from the child. The child is running
1610 free, and we expect it to do an exec or exit, at which point the
1611 OS makes the parent schedulable again (and the target reports
1612 that the vfork is done). Until the child is done with the shared
1613 memory region, do not insert breakpoints in the parent, otherwise
1614 the child could still trip on the parent's breakpoints. Since
1615 the parent is blocked anyway, it won't miss any breakpoint. */
1616 if (bl
->pspace
->breakpoints_not_allowed
)
1622 /* Same as should_be_inserted but does the check assuming
1623 that the location is not duplicated. */
1626 unduplicated_should_be_inserted (struct bp_location
*bl
)
1629 const int save_duplicate
= bl
->duplicate
;
1632 result
= should_be_inserted (bl
);
1633 bl
->duplicate
= save_duplicate
;
1637 /* Insert a low-level "breakpoint" of some type. BL is the breakpoint
1638 location. Any error messages are printed to TMP_ERROR_STREAM; and
1639 DISABLED_BREAKS, and HW_BREAKPOINT_ERROR are used to report problems.
1640 Returns 0 for success, 1 if the bp_location type is not supported or
1643 NOTE drow/2003-09-09: This routine could be broken down to an
1644 object-style method for each breakpoint or catchpoint type. */
1646 insert_bp_location (struct bp_location
*bl
,
1647 struct ui_file
*tmp_error_stream
,
1648 int *disabled_breaks
,
1649 int *hw_breakpoint_error
)
1653 if (!should_be_inserted (bl
) || bl
->inserted
)
1656 /* Initialize the target-specific information. */
1657 memset (&bl
->target_info
, 0, sizeof (bl
->target_info
));
1658 bl
->target_info
.placed_address
= bl
->address
;
1659 bl
->target_info
.placed_address_space
= bl
->pspace
->aspace
;
1660 bl
->target_info
.length
= bl
->length
;
1662 if (bl
->loc_type
== bp_loc_software_breakpoint
1663 || bl
->loc_type
== bp_loc_hardware_breakpoint
)
1665 if (bl
->owner
->type
!= bp_hardware_breakpoint
)
1667 /* If the explicitly specified breakpoint type
1668 is not hardware breakpoint, check the memory map to see
1669 if the breakpoint address is in read only memory or not.
1671 Two important cases are:
1672 - location type is not hardware breakpoint, memory
1673 is readonly. We change the type of the location to
1674 hardware breakpoint.
1675 - location type is hardware breakpoint, memory is
1676 read-write. This means we've previously made the
1677 location hardware one, but then the memory map changed,
1680 When breakpoints are removed, remove_breakpoints will use
1681 location types we've just set here, the only possible
1682 problem is that memory map has changed during running
1683 program, but it's not going to work anyway with current
1685 struct mem_region
*mr
1686 = lookup_mem_region (bl
->target_info
.placed_address
);
1690 if (automatic_hardware_breakpoints
)
1692 enum bp_loc_type new_type
;
1694 if (mr
->attrib
.mode
!= MEM_RW
)
1695 new_type
= bp_loc_hardware_breakpoint
;
1697 new_type
= bp_loc_software_breakpoint
;
1699 if (new_type
!= bl
->loc_type
)
1701 static int said
= 0;
1703 bl
->loc_type
= new_type
;
1706 fprintf_filtered (gdb_stdout
,
1707 _("Note: automatically using "
1708 "hardware breakpoints for "
1709 "read-only addresses.\n"));
1714 else if (bl
->loc_type
== bp_loc_software_breakpoint
1715 && mr
->attrib
.mode
!= MEM_RW
)
1716 warning (_("cannot set software breakpoint "
1717 "at readonly address %s"),
1718 paddress (bl
->gdbarch
, bl
->address
));
1722 /* First check to see if we have to handle an overlay. */
1723 if (overlay_debugging
== ovly_off
1724 || bl
->section
== NULL
1725 || !(section_is_overlay (bl
->section
)))
1727 /* No overlay handling: just set the breakpoint. */
1729 val
= bl
->owner
->ops
->insert_location (bl
);
1733 /* This breakpoint is in an overlay section.
1734 Shall we set a breakpoint at the LMA? */
1735 if (!overlay_events_enabled
)
1737 /* Yes -- overlay event support is not active,
1738 so we must try to set a breakpoint at the LMA.
1739 This will not work for a hardware breakpoint. */
1740 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
1741 warning (_("hardware breakpoint %d not supported in overlay!"),
1745 CORE_ADDR addr
= overlay_unmapped_address (bl
->address
,
1747 /* Set a software (trap) breakpoint at the LMA. */
1748 bl
->overlay_target_info
= bl
->target_info
;
1749 bl
->overlay_target_info
.placed_address
= addr
;
1750 val
= target_insert_breakpoint (bl
->gdbarch
,
1751 &bl
->overlay_target_info
);
1753 fprintf_unfiltered (tmp_error_stream
,
1754 "Overlay breakpoint %d "
1755 "failed: in ROM?\n",
1759 /* Shall we set a breakpoint at the VMA? */
1760 if (section_is_mapped (bl
->section
))
1762 /* Yes. This overlay section is mapped into memory. */
1763 val
= bl
->owner
->ops
->insert_location (bl
);
1767 /* No. This breakpoint will not be inserted.
1768 No error, but do not mark the bp as 'inserted'. */
1775 /* Can't set the breakpoint. */
1776 if (solib_name_from_address (bl
->pspace
, bl
->address
))
1778 /* See also: disable_breakpoints_in_shlibs. */
1780 bl
->shlib_disabled
= 1;
1781 observer_notify_breakpoint_modified (bl
->owner
);
1782 if (!*disabled_breaks
)
1784 fprintf_unfiltered (tmp_error_stream
,
1785 "Cannot insert breakpoint %d.\n",
1787 fprintf_unfiltered (tmp_error_stream
,
1788 "Temporarily disabling shared "
1789 "library breakpoints:\n");
1791 *disabled_breaks
= 1;
1792 fprintf_unfiltered (tmp_error_stream
,
1793 "breakpoint #%d\n", bl
->owner
->number
);
1797 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
1799 *hw_breakpoint_error
= 1;
1800 fprintf_unfiltered (tmp_error_stream
,
1801 "Cannot insert hardware "
1807 fprintf_unfiltered (tmp_error_stream
,
1808 "Cannot insert breakpoint %d.\n",
1810 fprintf_filtered (tmp_error_stream
,
1811 "Error accessing memory address ");
1812 fputs_filtered (paddress (bl
->gdbarch
, bl
->address
),
1814 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1815 safe_strerror (val
));
1826 else if (bl
->loc_type
== bp_loc_hardware_watchpoint
1827 /* NOTE drow/2003-09-08: This state only exists for removing
1828 watchpoints. It's not clear that it's necessary... */
1829 && bl
->owner
->disposition
!= disp_del_at_next_stop
)
1831 gdb_assert (bl
->owner
->ops
!= NULL
1832 && bl
->owner
->ops
->insert_location
!= NULL
);
1834 val
= bl
->owner
->ops
->insert_location (bl
);
1836 /* If trying to set a read-watchpoint, and it turns out it's not
1837 supported, try emulating one with an access watchpoint. */
1838 if (val
== 1 && bl
->watchpoint_type
== hw_read
)
1840 struct bp_location
*loc
, **loc_temp
;
1842 /* But don't try to insert it, if there's already another
1843 hw_access location that would be considered a duplicate
1845 ALL_BP_LOCATIONS (loc
, loc_temp
)
1847 && loc
->watchpoint_type
== hw_access
1848 && watchpoint_locations_match (bl
, loc
))
1852 bl
->target_info
= loc
->target_info
;
1853 bl
->watchpoint_type
= hw_access
;
1860 bl
->watchpoint_type
= hw_access
;
1861 val
= bl
->owner
->ops
->insert_location (bl
);
1864 /* Back to the original value. */
1865 bl
->watchpoint_type
= hw_read
;
1869 bl
->inserted
= (val
== 0);
1872 else if (bl
->owner
->type
== bp_catchpoint
)
1874 gdb_assert (bl
->owner
->ops
!= NULL
1875 && bl
->owner
->ops
->insert_location
!= NULL
);
1877 val
= bl
->owner
->ops
->insert_location (bl
);
1880 bl
->owner
->enable_state
= bp_disabled
;
1884 Error inserting catchpoint %d: Your system does not support this type\n\
1885 of catchpoint."), bl
->owner
->number
);
1887 warning (_("Error inserting catchpoint %d."), bl
->owner
->number
);
1890 bl
->inserted
= (val
== 0);
1892 /* We've already printed an error message if there was a problem
1893 inserting this catchpoint, and we've disabled the catchpoint,
1894 so just return success. */
1901 /* This function is called when program space PSPACE is about to be
1902 deleted. It takes care of updating breakpoints to not reference
1906 breakpoint_program_space_exit (struct program_space
*pspace
)
1908 struct breakpoint
*b
, *b_temp
;
1909 struct bp_location
*loc
, **loc_temp
;
1911 /* Remove any breakpoint that was set through this program space. */
1912 ALL_BREAKPOINTS_SAFE (b
, b_temp
)
1914 if (b
->pspace
== pspace
)
1915 delete_breakpoint (b
);
1918 /* Breakpoints set through other program spaces could have locations
1919 bound to PSPACE as well. Remove those. */
1920 ALL_BP_LOCATIONS (loc
, loc_temp
)
1922 struct bp_location
*tmp
;
1924 if (loc
->pspace
== pspace
)
1926 /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */
1927 if (loc
->owner
->loc
== loc
)
1928 loc
->owner
->loc
= loc
->next
;
1930 for (tmp
= loc
->owner
->loc
; tmp
->next
!= NULL
; tmp
= tmp
->next
)
1931 if (tmp
->next
== loc
)
1933 tmp
->next
= loc
->next
;
1939 /* Now update the global location list to permanently delete the
1940 removed locations above. */
1941 update_global_location_list (0);
1944 /* Make sure all breakpoints are inserted in inferior.
1945 Throws exception on any error.
1946 A breakpoint that is already inserted won't be inserted
1947 again, so calling this function twice is safe. */
1949 insert_breakpoints (void)
1951 struct breakpoint
*bpt
;
1953 ALL_BREAKPOINTS (bpt
)
1954 if (is_hardware_watchpoint (bpt
))
1956 struct watchpoint
*w
= (struct watchpoint
*) bpt
;
1958 update_watchpoint (w
, 0 /* don't reparse. */);
1961 update_global_location_list (1);
1963 /* update_global_location_list does not insert breakpoints when
1964 always_inserted_mode is not enabled. Explicitly insert them
1966 if (!breakpoints_always_inserted_mode ())
1967 insert_breakpoint_locations ();
1970 /* Used when starting or continuing the program. */
1973 insert_breakpoint_locations (void)
1975 struct breakpoint
*bpt
;
1976 struct bp_location
*bl
, **blp_tmp
;
1979 int disabled_breaks
= 0;
1980 int hw_breakpoint_error
= 0;
1982 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1983 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (tmp_error_stream
);
1985 /* Explicitly mark the warning -- this will only be printed if
1986 there was an error. */
1987 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1989 save_current_space_and_thread ();
1991 ALL_BP_LOCATIONS (bl
, blp_tmp
)
1993 if (!should_be_inserted (bl
) || bl
->inserted
)
1996 /* There is no point inserting thread-specific breakpoints if
1997 the thread no longer exists. ALL_BP_LOCATIONS bp_location
1998 has BL->OWNER always non-NULL. */
1999 if (bl
->owner
->thread
!= -1
2000 && !valid_thread_id (bl
->owner
->thread
))
2003 switch_to_program_space_and_thread (bl
->pspace
);
2005 /* For targets that support global breakpoints, there's no need
2006 to select an inferior to insert breakpoint to. In fact, even
2007 if we aren't attached to any process yet, we should still
2008 insert breakpoints. */
2009 if (!gdbarch_has_global_breakpoints (target_gdbarch
)
2010 && ptid_equal (inferior_ptid
, null_ptid
))
2013 val
= insert_bp_location (bl
, tmp_error_stream
, &disabled_breaks
,
2014 &hw_breakpoint_error
);
2019 /* If we failed to insert all locations of a watchpoint, remove
2020 them, as half-inserted watchpoint is of limited use. */
2021 ALL_BREAKPOINTS (bpt
)
2023 int some_failed
= 0;
2024 struct bp_location
*loc
;
2026 if (!is_hardware_watchpoint (bpt
))
2029 if (!breakpoint_enabled (bpt
))
2032 if (bpt
->disposition
== disp_del_at_next_stop
)
2035 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
2036 if (!loc
->inserted
&& should_be_inserted (loc
))
2043 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
2045 remove_breakpoint (loc
, mark_uninserted
);
2047 hw_breakpoint_error
= 1;
2048 fprintf_unfiltered (tmp_error_stream
,
2049 "Could not insert hardware watchpoint %d.\n",
2057 /* If a hardware breakpoint or watchpoint was inserted, add a
2058 message about possibly exhausted resources. */
2059 if (hw_breakpoint_error
)
2061 fprintf_unfiltered (tmp_error_stream
,
2062 "Could not insert hardware breakpoints:\n\
2063 You may have requested too many hardware breakpoints/watchpoints.\n");
2065 target_terminal_ours_for_output ();
2066 error_stream (tmp_error_stream
);
2069 do_cleanups (cleanups
);
2072 /* Used when the program stops.
2073 Returns zero if successful, or non-zero if there was a problem
2074 removing a breakpoint location. */
2077 remove_breakpoints (void)
2079 struct bp_location
*bl
, **blp_tmp
;
2082 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2084 if (bl
->inserted
&& !is_tracepoint (bl
->owner
))
2085 val
|= remove_breakpoint (bl
, mark_uninserted
);
2090 /* Remove breakpoints of process PID. */
2093 remove_breakpoints_pid (int pid
)
2095 struct bp_location
*bl
, **blp_tmp
;
2097 struct inferior
*inf
= find_inferior_pid (pid
);
2099 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2101 if (bl
->pspace
!= inf
->pspace
)
2106 val
= remove_breakpoint (bl
, mark_uninserted
);
2115 reattach_breakpoints (int pid
)
2117 struct cleanup
*old_chain
;
2118 struct bp_location
*bl
, **blp_tmp
;
2120 struct ui_file
*tmp_error_stream
;
2121 int dummy1
= 0, dummy2
= 0;
2122 struct inferior
*inf
;
2123 struct thread_info
*tp
;
2125 tp
= any_live_thread_of_process (pid
);
2129 inf
= find_inferior_pid (pid
);
2130 old_chain
= save_inferior_ptid ();
2132 inferior_ptid
= tp
->ptid
;
2134 tmp_error_stream
= mem_fileopen ();
2135 make_cleanup_ui_file_delete (tmp_error_stream
);
2137 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2139 if (bl
->pspace
!= inf
->pspace
)
2145 val
= insert_bp_location (bl
, tmp_error_stream
, &dummy1
, &dummy2
);
2148 do_cleanups (old_chain
);
2153 do_cleanups (old_chain
);
2157 static int internal_breakpoint_number
= -1;
2159 /* Set the breakpoint number of B, depending on the value of INTERNAL.
2160 If INTERNAL is non-zero, the breakpoint number will be populated
2161 from internal_breakpoint_number and that variable decremented.
2162 Otherwise the breakpoint number will be populated from
2163 breakpoint_count and that value incremented. Internal breakpoints
2164 do not set the internal var bpnum. */
2166 set_breakpoint_number (int internal
, struct breakpoint
*b
)
2169 b
->number
= internal_breakpoint_number
--;
2172 set_breakpoint_count (breakpoint_count
+ 1);
2173 b
->number
= breakpoint_count
;
2177 static struct breakpoint
*
2178 create_internal_breakpoint (struct gdbarch
*gdbarch
,
2179 CORE_ADDR address
, enum bptype type
,
2180 const struct breakpoint_ops
*ops
)
2182 struct symtab_and_line sal
;
2183 struct breakpoint
*b
;
2185 init_sal (&sal
); /* Initialize to zeroes. */
2188 sal
.section
= find_pc_overlay (sal
.pc
);
2189 sal
.pspace
= current_program_space
;
2191 b
= set_raw_breakpoint (gdbarch
, sal
, type
, ops
);
2192 b
->number
= internal_breakpoint_number
--;
2193 b
->disposition
= disp_donttouch
;
2198 static const char *const longjmp_names
[] =
2200 "longjmp", "_longjmp", "siglongjmp", "_siglongjmp"
2202 #define NUM_LONGJMP_NAMES ARRAY_SIZE(longjmp_names)
2204 /* Per-objfile data private to breakpoint.c. */
2205 struct breakpoint_objfile_data
2207 /* Minimal symbol for "_ovly_debug_event" (if any). */
2208 struct minimal_symbol
*overlay_msym
;
2210 /* Minimal symbol(s) for "longjmp", "siglongjmp", etc. (if any). */
2211 struct minimal_symbol
*longjmp_msym
[NUM_LONGJMP_NAMES
];
2213 /* Minimal symbol for "std::terminate()" (if any). */
2214 struct minimal_symbol
*terminate_msym
;
2216 /* Minimal symbol for "_Unwind_DebugHook" (if any). */
2217 struct minimal_symbol
*exception_msym
;
2220 static const struct objfile_data
*breakpoint_objfile_key
;
2222 /* Minimal symbol not found sentinel. */
2223 static struct minimal_symbol msym_not_found
;
2225 /* Returns TRUE if MSYM point to the "not found" sentinel. */
2228 msym_not_found_p (const struct minimal_symbol
*msym
)
2230 return msym
== &msym_not_found
;
2233 /* Return per-objfile data needed by breakpoint.c.
2234 Allocate the data if necessary. */
2236 static struct breakpoint_objfile_data
*
2237 get_breakpoint_objfile_data (struct objfile
*objfile
)
2239 struct breakpoint_objfile_data
*bp_objfile_data
;
2241 bp_objfile_data
= objfile_data (objfile
, breakpoint_objfile_key
);
2242 if (bp_objfile_data
== NULL
)
2244 bp_objfile_data
= obstack_alloc (&objfile
->objfile_obstack
,
2245 sizeof (*bp_objfile_data
));
2247 memset (bp_objfile_data
, 0, sizeof (*bp_objfile_data
));
2248 set_objfile_data (objfile
, breakpoint_objfile_key
, bp_objfile_data
);
2250 return bp_objfile_data
;
2254 create_overlay_event_breakpoint (void)
2256 struct objfile
*objfile
;
2257 const char *const func_name
= "_ovly_debug_event";
2259 ALL_OBJFILES (objfile
)
2261 struct breakpoint
*b
;
2262 struct breakpoint_objfile_data
*bp_objfile_data
;
2265 bp_objfile_data
= get_breakpoint_objfile_data (objfile
);
2267 if (msym_not_found_p (bp_objfile_data
->overlay_msym
))
2270 if (bp_objfile_data
->overlay_msym
== NULL
)
2272 struct minimal_symbol
*m
;
2274 m
= lookup_minimal_symbol_text (func_name
, objfile
);
2277 /* Avoid future lookups in this objfile. */
2278 bp_objfile_data
->overlay_msym
= &msym_not_found
;
2281 bp_objfile_data
->overlay_msym
= m
;
2284 addr
= SYMBOL_VALUE_ADDRESS (bp_objfile_data
->overlay_msym
);
2285 b
= create_internal_breakpoint (get_objfile_arch (objfile
), addr
,
2287 &internal_breakpoint_ops
);
2288 b
->addr_string
= xstrdup (func_name
);
2290 if (overlay_debugging
== ovly_auto
)
2292 b
->enable_state
= bp_enabled
;
2293 overlay_events_enabled
= 1;
2297 b
->enable_state
= bp_disabled
;
2298 overlay_events_enabled
= 0;
2301 update_global_location_list (1);
2305 create_longjmp_master_breakpoint (void)
2307 struct program_space
*pspace
;
2308 struct cleanup
*old_chain
;
2310 old_chain
= save_current_program_space ();
2312 ALL_PSPACES (pspace
)
2314 struct objfile
*objfile
;
2316 set_current_program_space (pspace
);
2318 ALL_OBJFILES (objfile
)
2321 struct gdbarch
*gdbarch
;
2322 struct breakpoint_objfile_data
*bp_objfile_data
;
2324 gdbarch
= get_objfile_arch (objfile
);
2325 if (!gdbarch_get_longjmp_target_p (gdbarch
))
2328 bp_objfile_data
= get_breakpoint_objfile_data (objfile
);
2330 for (i
= 0; i
< NUM_LONGJMP_NAMES
; i
++)
2332 struct breakpoint
*b
;
2333 const char *func_name
;
2336 if (msym_not_found_p (bp_objfile_data
->longjmp_msym
[i
]))
2339 func_name
= longjmp_names
[i
];
2340 if (bp_objfile_data
->longjmp_msym
[i
] == NULL
)
2342 struct minimal_symbol
*m
;
2344 m
= lookup_minimal_symbol_text (func_name
, objfile
);
2347 /* Prevent future lookups in this objfile. */
2348 bp_objfile_data
->longjmp_msym
[i
] = &msym_not_found
;
2351 bp_objfile_data
->longjmp_msym
[i
] = m
;
2354 addr
= SYMBOL_VALUE_ADDRESS (bp_objfile_data
->longjmp_msym
[i
]);
2355 b
= create_internal_breakpoint (gdbarch
, addr
, bp_longjmp_master
,
2356 &internal_breakpoint_ops
);
2357 b
->addr_string
= xstrdup (func_name
);
2358 b
->enable_state
= bp_disabled
;
2362 update_global_location_list (1);
2364 do_cleanups (old_chain
);
2367 /* Create a master std::terminate breakpoint. */
2369 create_std_terminate_master_breakpoint (void)
2371 struct program_space
*pspace
;
2372 struct cleanup
*old_chain
;
2373 const char *const func_name
= "std::terminate()";
2375 old_chain
= save_current_program_space ();
2377 ALL_PSPACES (pspace
)
2379 struct objfile
*objfile
;
2382 set_current_program_space (pspace
);
2384 ALL_OBJFILES (objfile
)
2386 struct breakpoint
*b
;
2387 struct breakpoint_objfile_data
*bp_objfile_data
;
2389 bp_objfile_data
= get_breakpoint_objfile_data (objfile
);
2391 if (msym_not_found_p (bp_objfile_data
->terminate_msym
))
2394 if (bp_objfile_data
->terminate_msym
== NULL
)
2396 struct minimal_symbol
*m
;
2398 m
= lookup_minimal_symbol (func_name
, NULL
, objfile
);
2399 if (m
== NULL
|| (MSYMBOL_TYPE (m
) != mst_text
2400 && MSYMBOL_TYPE (m
) != mst_file_text
))
2402 /* Prevent future lookups in this objfile. */
2403 bp_objfile_data
->terminate_msym
= &msym_not_found
;
2406 bp_objfile_data
->terminate_msym
= m
;
2409 addr
= SYMBOL_VALUE_ADDRESS (bp_objfile_data
->terminate_msym
);
2410 b
= create_internal_breakpoint (get_objfile_arch (objfile
), addr
,
2411 bp_std_terminate_master
,
2412 &internal_breakpoint_ops
);
2413 b
->addr_string
= xstrdup (func_name
);
2414 b
->enable_state
= bp_disabled
;
2418 update_global_location_list (1);
2420 do_cleanups (old_chain
);
2423 /* Install a master breakpoint on the unwinder's debug hook. */
2426 create_exception_master_breakpoint (void)
2428 struct objfile
*objfile
;
2429 const char *const func_name
= "_Unwind_DebugHook";
2431 ALL_OBJFILES (objfile
)
2433 struct breakpoint
*b
;
2434 struct gdbarch
*gdbarch
;
2435 struct breakpoint_objfile_data
*bp_objfile_data
;
2438 bp_objfile_data
= get_breakpoint_objfile_data (objfile
);
2440 if (msym_not_found_p (bp_objfile_data
->exception_msym
))
2443 gdbarch
= get_objfile_arch (objfile
);
2445 if (bp_objfile_data
->exception_msym
== NULL
)
2447 struct minimal_symbol
*debug_hook
;
2449 debug_hook
= lookup_minimal_symbol (func_name
, NULL
, objfile
);
2450 if (debug_hook
== NULL
)
2452 bp_objfile_data
->exception_msym
= &msym_not_found
;
2456 bp_objfile_data
->exception_msym
= debug_hook
;
2459 addr
= SYMBOL_VALUE_ADDRESS (bp_objfile_data
->exception_msym
);
2460 addr
= gdbarch_convert_from_func_ptr_addr (gdbarch
, addr
,
2462 b
= create_internal_breakpoint (gdbarch
, addr
, bp_exception_master
,
2463 &internal_breakpoint_ops
);
2464 b
->addr_string
= xstrdup (func_name
);
2465 b
->enable_state
= bp_disabled
;
2468 update_global_location_list (1);
2472 update_breakpoints_after_exec (void)
2474 struct breakpoint
*b
, *b_tmp
;
2475 struct bp_location
*bploc
, **bplocp_tmp
;
2477 /* We're about to delete breakpoints from GDB's lists. If the
2478 INSERTED flag is true, GDB will try to lift the breakpoints by
2479 writing the breakpoints' "shadow contents" back into memory. The
2480 "shadow contents" are NOT valid after an exec, so GDB should not
2481 do that. Instead, the target is responsible from marking
2482 breakpoints out as soon as it detects an exec. We don't do that
2483 here instead, because there may be other attempts to delete
2484 breakpoints after detecting an exec and before reaching here. */
2485 ALL_BP_LOCATIONS (bploc
, bplocp_tmp
)
2486 if (bploc
->pspace
== current_program_space
)
2487 gdb_assert (!bploc
->inserted
);
2489 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
2491 if (b
->pspace
!= current_program_space
)
2494 /* Solib breakpoints must be explicitly reset after an exec(). */
2495 if (b
->type
== bp_shlib_event
)
2497 delete_breakpoint (b
);
2501 /* JIT breakpoints must be explicitly reset after an exec(). */
2502 if (b
->type
== bp_jit_event
)
2504 delete_breakpoint (b
);
2508 /* Thread event breakpoints must be set anew after an exec(),
2509 as must overlay event and longjmp master breakpoints. */
2510 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
2511 || b
->type
== bp_longjmp_master
|| b
->type
== bp_std_terminate_master
2512 || b
->type
== bp_exception_master
)
2514 delete_breakpoint (b
);
2518 /* Step-resume breakpoints are meaningless after an exec(). */
2519 if (b
->type
== bp_step_resume
|| b
->type
== bp_hp_step_resume
)
2521 delete_breakpoint (b
);
2525 /* Longjmp and longjmp-resume breakpoints are also meaningless
2527 if (b
->type
== bp_longjmp
|| b
->type
== bp_longjmp_resume
2528 || b
->type
== bp_exception
|| b
->type
== bp_exception_resume
)
2530 delete_breakpoint (b
);
2534 if (b
->type
== bp_catchpoint
)
2536 /* For now, none of the bp_catchpoint breakpoints need to
2537 do anything at this point. In the future, if some of
2538 the catchpoints need to something, we will need to add
2539 a new method, and call this method from here. */
2543 /* bp_finish is a special case. The only way we ought to be able
2544 to see one of these when an exec() has happened, is if the user
2545 caught a vfork, and then said "finish". Ordinarily a finish just
2546 carries them to the call-site of the current callee, by setting
2547 a temporary bp there and resuming. But in this case, the finish
2548 will carry them entirely through the vfork & exec.
2550 We don't want to allow a bp_finish to remain inserted now. But
2551 we can't safely delete it, 'cause finish_command has a handle to
2552 the bp on a bpstat, and will later want to delete it. There's a
2553 chance (and I've seen it happen) that if we delete the bp_finish
2554 here, that its storage will get reused by the time finish_command
2555 gets 'round to deleting the "use to be a bp_finish" breakpoint.
2556 We really must allow finish_command to delete a bp_finish.
2558 In the absence of a general solution for the "how do we know
2559 it's safe to delete something others may have handles to?"
2560 problem, what we'll do here is just uninsert the bp_finish, and
2561 let finish_command delete it.
2563 (We know the bp_finish is "doomed" in the sense that it's
2564 momentary, and will be deleted as soon as finish_command sees
2565 the inferior stopped. So it doesn't matter that the bp's
2566 address is probably bogus in the new a.out, unlike e.g., the
2567 solib breakpoints.) */
2569 if (b
->type
== bp_finish
)
2574 /* Without a symbolic address, we have little hope of the
2575 pre-exec() address meaning the same thing in the post-exec()
2577 if (b
->addr_string
== NULL
)
2579 delete_breakpoint (b
);
2583 /* FIXME what about longjmp breakpoints? Re-create them here? */
2584 create_overlay_event_breakpoint ();
2585 create_longjmp_master_breakpoint ();
2586 create_std_terminate_master_breakpoint ();
2587 create_exception_master_breakpoint ();
2591 detach_breakpoints (int pid
)
2593 struct bp_location
*bl
, **blp_tmp
;
2595 struct cleanup
*old_chain
= save_inferior_ptid ();
2596 struct inferior
*inf
= current_inferior ();
2598 if (pid
== PIDGET (inferior_ptid
))
2599 error (_("Cannot detach breakpoints of inferior_ptid"));
2601 /* Set inferior_ptid; remove_breakpoint_1 uses this global. */
2602 inferior_ptid
= pid_to_ptid (pid
);
2603 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2605 if (bl
->pspace
!= inf
->pspace
)
2609 val
|= remove_breakpoint_1 (bl
, mark_inserted
);
2612 /* Detach single-step breakpoints as well. */
2613 detach_single_step_breakpoints ();
2615 do_cleanups (old_chain
);
2619 /* Remove the breakpoint location BL from the current address space.
2620 Note that this is used to detach breakpoints from a child fork.
2621 When we get here, the child isn't in the inferior list, and neither
2622 do we have objects to represent its address space --- we should
2623 *not* look at bl->pspace->aspace here. */
2626 remove_breakpoint_1 (struct bp_location
*bl
, insertion_state_t is
)
2630 /* BL is never in moribund_locations by our callers. */
2631 gdb_assert (bl
->owner
!= NULL
);
2633 if (bl
->owner
->enable_state
== bp_permanent
)
2634 /* Permanent breakpoints cannot be inserted or removed. */
2637 /* The type of none suggests that owner is actually deleted.
2638 This should not ever happen. */
2639 gdb_assert (bl
->owner
->type
!= bp_none
);
2641 if (bl
->loc_type
== bp_loc_software_breakpoint
2642 || bl
->loc_type
== bp_loc_hardware_breakpoint
)
2644 /* "Normal" instruction breakpoint: either the standard
2645 trap-instruction bp (bp_breakpoint), or a
2646 bp_hardware_breakpoint. */
2648 /* First check to see if we have to handle an overlay. */
2649 if (overlay_debugging
== ovly_off
2650 || bl
->section
== NULL
2651 || !(section_is_overlay (bl
->section
)))
2653 /* No overlay handling: just remove the breakpoint. */
2654 val
= bl
->owner
->ops
->remove_location (bl
);
2658 /* This breakpoint is in an overlay section.
2659 Did we set a breakpoint at the LMA? */
2660 if (!overlay_events_enabled
)
2662 /* Yes -- overlay event support is not active, so we
2663 should have set a breakpoint at the LMA. Remove it.
2665 /* Ignore any failures: if the LMA is in ROM, we will
2666 have already warned when we failed to insert it. */
2667 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
2668 target_remove_hw_breakpoint (bl
->gdbarch
,
2669 &bl
->overlay_target_info
);
2671 target_remove_breakpoint (bl
->gdbarch
,
2672 &bl
->overlay_target_info
);
2674 /* Did we set a breakpoint at the VMA?
2675 If so, we will have marked the breakpoint 'inserted'. */
2678 /* Yes -- remove it. Previously we did not bother to
2679 remove the breakpoint if the section had been
2680 unmapped, but let's not rely on that being safe. We
2681 don't know what the overlay manager might do. */
2683 /* However, we should remove *software* breakpoints only
2684 if the section is still mapped, or else we overwrite
2685 wrong code with the saved shadow contents. */
2686 if (bl
->loc_type
== bp_loc_hardware_breakpoint
2687 || section_is_mapped (bl
->section
))
2688 val
= bl
->owner
->ops
->remove_location (bl
);
2694 /* No -- not inserted, so no need to remove. No error. */
2699 /* In some cases, we might not be able to remove a breakpoint
2700 in a shared library that has already been removed, but we
2701 have not yet processed the shlib unload event. */
2702 if (val
&& solib_name_from_address (bl
->pspace
, bl
->address
))
2707 bl
->inserted
= (is
== mark_inserted
);
2709 else if (bl
->loc_type
== bp_loc_hardware_watchpoint
)
2711 gdb_assert (bl
->owner
->ops
!= NULL
2712 && bl
->owner
->ops
->remove_location
!= NULL
);
2714 bl
->inserted
= (is
== mark_inserted
);
2715 bl
->owner
->ops
->remove_location (bl
);
2717 /* Failure to remove any of the hardware watchpoints comes here. */
2718 if ((is
== mark_uninserted
) && (bl
->inserted
))
2719 warning (_("Could not remove hardware watchpoint %d."),
2722 else if (bl
->owner
->type
== bp_catchpoint
2723 && breakpoint_enabled (bl
->owner
)
2726 gdb_assert (bl
->owner
->ops
!= NULL
2727 && bl
->owner
->ops
->remove_location
!= NULL
);
2729 val
= bl
->owner
->ops
->remove_location (bl
);
2733 bl
->inserted
= (is
== mark_inserted
);
2740 remove_breakpoint (struct bp_location
*bl
, insertion_state_t is
)
2743 struct cleanup
*old_chain
;
2745 /* BL is never in moribund_locations by our callers. */
2746 gdb_assert (bl
->owner
!= NULL
);
2748 if (bl
->owner
->enable_state
== bp_permanent
)
2749 /* Permanent breakpoints cannot be inserted or removed. */
2752 /* The type of none suggests that owner is actually deleted.
2753 This should not ever happen. */
2754 gdb_assert (bl
->owner
->type
!= bp_none
);
2756 old_chain
= save_current_space_and_thread ();
2758 switch_to_program_space_and_thread (bl
->pspace
);
2760 ret
= remove_breakpoint_1 (bl
, is
);
2762 do_cleanups (old_chain
);
2766 /* Clear the "inserted" flag in all breakpoints. */
2769 mark_breakpoints_out (void)
2771 struct bp_location
*bl
, **blp_tmp
;
2773 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2774 if (bl
->pspace
== current_program_space
)
2778 /* Clear the "inserted" flag in all breakpoints and delete any
2779 breakpoints which should go away between runs of the program.
2781 Plus other such housekeeping that has to be done for breakpoints
2784 Note: this function gets called at the end of a run (by
2785 generic_mourn_inferior) and when a run begins (by
2786 init_wait_for_inferior). */
2791 breakpoint_init_inferior (enum inf_context context
)
2793 struct breakpoint
*b
, *b_tmp
;
2794 struct bp_location
*bl
, **blp_tmp
;
2796 struct program_space
*pspace
= current_program_space
;
2798 /* If breakpoint locations are shared across processes, then there's
2800 if (gdbarch_has_global_breakpoints (target_gdbarch
))
2803 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2805 /* ALL_BP_LOCATIONS bp_location has BL->OWNER always non-NULL. */
2806 if (bl
->pspace
== pspace
2807 && bl
->owner
->enable_state
!= bp_permanent
)
2811 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
2813 if (b
->loc
&& b
->loc
->pspace
!= pspace
)
2820 /* If the call dummy breakpoint is at the entry point it will
2821 cause problems when the inferior is rerun, so we better get
2824 case bp_watchpoint_scope
:
2826 /* Also get rid of scope breakpoints. */
2828 case bp_shlib_event
:
2830 /* Also remove solib event breakpoints. Their addresses may
2831 have changed since the last time we ran the program.
2832 Actually we may now be debugging against different target;
2833 and so the solib backend that installed this breakpoint may
2834 not be used in by the target. E.g.,
2836 (gdb) file prog-linux
2837 (gdb) run # native linux target
2840 (gdb) file prog-win.exe
2841 (gdb) tar rem :9999 # remote Windows gdbserver.
2844 delete_breakpoint (b
);
2848 case bp_hardware_watchpoint
:
2849 case bp_read_watchpoint
:
2850 case bp_access_watchpoint
:
2852 struct watchpoint
*w
= (struct watchpoint
*) b
;
2854 /* Likewise for watchpoints on local expressions. */
2855 if (w
->exp_valid_block
!= NULL
)
2856 delete_breakpoint (b
);
2857 else if (context
== inf_starting
)
2859 /* Reset val field to force reread of starting value in
2860 insert_breakpoints. */
2862 value_free (w
->val
);
2873 /* Get rid of the moribund locations. */
2874 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, bl
); ++ix
)
2875 decref_bp_location (&bl
);
2876 VEC_free (bp_location_p
, moribund_locations
);
2879 /* These functions concern about actual breakpoints inserted in the
2880 target --- to e.g. check if we need to do decr_pc adjustment or if
2881 we need to hop over the bkpt --- so we check for address space
2882 match, not program space. */
2884 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
2885 exists at PC. It returns ordinary_breakpoint_here if it's an
2886 ordinary breakpoint, or permanent_breakpoint_here if it's a
2887 permanent breakpoint.
2888 - When continuing from a location with an ordinary breakpoint, we
2889 actually single step once before calling insert_breakpoints.
2890 - When continuing from a location with a permanent breakpoint, we
2891 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
2892 the target, to advance the PC past the breakpoint. */
2894 enum breakpoint_here
2895 breakpoint_here_p (struct address_space
*aspace
, CORE_ADDR pc
)
2897 struct bp_location
*bl
, **blp_tmp
;
2898 int any_breakpoint_here
= 0;
2900 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2902 if (bl
->loc_type
!= bp_loc_software_breakpoint
2903 && bl
->loc_type
!= bp_loc_hardware_breakpoint
)
2906 /* ALL_BP_LOCATIONS bp_location has BL->OWNER always non-NULL. */
2907 if ((breakpoint_enabled (bl
->owner
)
2908 || bl
->owner
->enable_state
== bp_permanent
)
2909 && breakpoint_location_address_match (bl
, aspace
, pc
))
2911 if (overlay_debugging
2912 && section_is_overlay (bl
->section
)
2913 && !section_is_mapped (bl
->section
))
2914 continue; /* unmapped overlay -- can't be a match */
2915 else if (bl
->owner
->enable_state
== bp_permanent
)
2916 return permanent_breakpoint_here
;
2918 any_breakpoint_here
= 1;
2922 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
2925 /* Return true if there's a moribund breakpoint at PC. */
2928 moribund_breakpoint_here_p (struct address_space
*aspace
, CORE_ADDR pc
)
2930 struct bp_location
*loc
;
2933 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
2934 if (breakpoint_location_address_match (loc
, aspace
, pc
))
2940 /* Returns non-zero if there's a breakpoint inserted at PC, which is
2941 inserted using regular breakpoint_chain / bp_location array
2942 mechanism. This does not check for single-step breakpoints, which
2943 are inserted and removed using direct target manipulation. */
2946 regular_breakpoint_inserted_here_p (struct address_space
*aspace
,
2949 struct bp_location
*bl
, **blp_tmp
;
2951 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2953 if (bl
->loc_type
!= bp_loc_software_breakpoint
2954 && bl
->loc_type
!= bp_loc_hardware_breakpoint
)
2958 && breakpoint_location_address_match (bl
, aspace
, pc
))
2960 if (overlay_debugging
2961 && section_is_overlay (bl
->section
)
2962 && !section_is_mapped (bl
->section
))
2963 continue; /* unmapped overlay -- can't be a match */
2971 /* Returns non-zero iff there's either regular breakpoint
2972 or a single step breakpoint inserted at PC. */
2975 breakpoint_inserted_here_p (struct address_space
*aspace
, CORE_ADDR pc
)
2977 if (regular_breakpoint_inserted_here_p (aspace
, pc
))
2980 if (single_step_breakpoint_inserted_here_p (aspace
, pc
))
2986 /* This function returns non-zero iff there is a software breakpoint
2990 software_breakpoint_inserted_here_p (struct address_space
*aspace
,
2993 struct bp_location
*bl
, **blp_tmp
;
2995 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2997 if (bl
->loc_type
!= bp_loc_software_breakpoint
)
3001 && breakpoint_address_match (bl
->pspace
->aspace
, bl
->address
,
3004 if (overlay_debugging
3005 && section_is_overlay (bl
->section
)
3006 && !section_is_mapped (bl
->section
))
3007 continue; /* unmapped overlay -- can't be a match */
3013 /* Also check for software single-step breakpoints. */
3014 if (single_step_breakpoint_inserted_here_p (aspace
, pc
))
3021 hardware_watchpoint_inserted_in_range (struct address_space
*aspace
,
3022 CORE_ADDR addr
, ULONGEST len
)
3024 struct breakpoint
*bpt
;
3026 ALL_BREAKPOINTS (bpt
)
3028 struct bp_location
*loc
;
3030 if (bpt
->type
!= bp_hardware_watchpoint
3031 && bpt
->type
!= bp_access_watchpoint
)
3034 if (!breakpoint_enabled (bpt
))
3037 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
3038 if (loc
->pspace
->aspace
== aspace
&& loc
->inserted
)
3042 /* Check for intersection. */
3043 l
= max (loc
->address
, addr
);
3044 h
= min (loc
->address
+ loc
->length
, addr
+ len
);
3052 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
3053 PC is valid for process/thread PTID. */
3056 breakpoint_thread_match (struct address_space
*aspace
, CORE_ADDR pc
,
3059 struct bp_location
*bl
, **blp_tmp
;
3060 /* The thread and task IDs associated to PTID, computed lazily. */
3064 ALL_BP_LOCATIONS (bl
, blp_tmp
)
3066 if (bl
->loc_type
!= bp_loc_software_breakpoint
3067 && bl
->loc_type
!= bp_loc_hardware_breakpoint
)
3070 /* ALL_BP_LOCATIONS bp_location has bl->OWNER always non-NULL. */
3071 if (!breakpoint_enabled (bl
->owner
)
3072 && bl
->owner
->enable_state
!= bp_permanent
)
3075 if (!breakpoint_location_address_match (bl
, aspace
, pc
))
3078 if (bl
->owner
->thread
!= -1)
3080 /* This is a thread-specific breakpoint. Check that ptid
3081 matches that thread. If thread hasn't been computed yet,
3082 it is now time to do so. */
3084 thread
= pid_to_thread_id (ptid
);
3085 if (bl
->owner
->thread
!= thread
)
3089 if (bl
->owner
->task
!= 0)
3091 /* This is a task-specific breakpoint. Check that ptid
3092 matches that task. If task hasn't been computed yet,
3093 it is now time to do so. */
3095 task
= ada_get_task_number (ptid
);
3096 if (bl
->owner
->task
!= task
)
3100 if (overlay_debugging
3101 && section_is_overlay (bl
->section
)
3102 && !section_is_mapped (bl
->section
))
3103 continue; /* unmapped overlay -- can't be a match */
3112 /* bpstat stuff. External routines' interfaces are documented
3116 ep_is_catchpoint (struct breakpoint
*ep
)
3118 return (ep
->type
== bp_catchpoint
);
3121 /* Frees any storage that is part of a bpstat. Does not walk the
3125 bpstat_free (bpstat bs
)
3127 if (bs
->old_val
!= NULL
)
3128 value_free (bs
->old_val
);
3129 decref_counted_command_line (&bs
->commands
);
3130 decref_bp_location (&bs
->bp_location_at
);
3134 /* Clear a bpstat so that it says we are not at any breakpoint.
3135 Also free any storage that is part of a bpstat. */
3138 bpstat_clear (bpstat
*bsp
)
3155 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
3156 is part of the bpstat is copied as well. */
3159 bpstat_copy (bpstat bs
)
3163 bpstat retval
= NULL
;
3168 for (; bs
!= NULL
; bs
= bs
->next
)
3170 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
3171 memcpy (tmp
, bs
, sizeof (*tmp
));
3172 incref_counted_command_line (tmp
->commands
);
3173 incref_bp_location (tmp
->bp_location_at
);
3174 if (bs
->old_val
!= NULL
)
3176 tmp
->old_val
= value_copy (bs
->old_val
);
3177 release_value (tmp
->old_val
);
3181 /* This is the first thing in the chain. */
3191 /* Find the bpstat associated with this breakpoint. */
3194 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
3199 for (; bsp
!= NULL
; bsp
= bsp
->next
)
3201 if (bsp
->breakpoint_at
== breakpoint
)
3207 /* Put in *NUM the breakpoint number of the first breakpoint we are
3208 stopped at. *BSP upon return is a bpstat which points to the
3209 remaining breakpoints stopped at (but which is not guaranteed to be
3210 good for anything but further calls to bpstat_num).
3212 Return 0 if passed a bpstat which does not indicate any breakpoints.
3213 Return -1 if stopped at a breakpoint that has been deleted since
3215 Return 1 otherwise. */
3218 bpstat_num (bpstat
*bsp
, int *num
)
3220 struct breakpoint
*b
;
3223 return 0; /* No more breakpoint values */
3225 /* We assume we'll never have several bpstats that correspond to a
3226 single breakpoint -- otherwise, this function might return the
3227 same number more than once and this will look ugly. */
3228 b
= (*bsp
)->breakpoint_at
;
3229 *bsp
= (*bsp
)->next
;
3231 return -1; /* breakpoint that's been deleted since */
3233 *num
= b
->number
; /* We have its number */
3237 /* See breakpoint.h. */
3240 bpstat_clear_actions (void)
3242 struct thread_info
*tp
;
3245 if (ptid_equal (inferior_ptid
, null_ptid
))
3248 tp
= find_thread_ptid (inferior_ptid
);
3252 for (bs
= tp
->control
.stop_bpstat
; bs
!= NULL
; bs
= bs
->next
)
3254 decref_counted_command_line (&bs
->commands
);
3256 if (bs
->old_val
!= NULL
)
3258 value_free (bs
->old_val
);
3264 /* Called when a command is about to proceed the inferior. */
3267 breakpoint_about_to_proceed (void)
3269 if (!ptid_equal (inferior_ptid
, null_ptid
))
3271 struct thread_info
*tp
= inferior_thread ();
3273 /* Allow inferior function calls in breakpoint commands to not
3274 interrupt the command list. When the call finishes
3275 successfully, the inferior will be standing at the same
3276 breakpoint as if nothing happened. */
3277 if (tp
->control
.in_infcall
)
3281 breakpoint_proceeded
= 1;
3284 /* Stub for cleaning up our state if we error-out of a breakpoint
3287 cleanup_executing_breakpoints (void *ignore
)
3289 executing_breakpoint_commands
= 0;
3292 /* Return non-zero iff CMD as the first line of a command sequence is `silent'
3293 or its equivalent. */
3296 command_line_is_silent (struct command_line
*cmd
)
3298 return cmd
&& (strcmp ("silent", cmd
->line
) == 0
3299 || (xdb_commands
&& strcmp ("Q", cmd
->line
) == 0));
3302 /* Execute all the commands associated with all the breakpoints at
3303 this location. Any of these commands could cause the process to
3304 proceed beyond this point, etc. We look out for such changes by
3305 checking the global "breakpoint_proceeded" after each command.
3307 Returns true if a breakpoint command resumed the inferior. In that
3308 case, it is the caller's responsibility to recall it again with the
3309 bpstat of the current thread. */
3312 bpstat_do_actions_1 (bpstat
*bsp
)
3315 struct cleanup
*old_chain
;
3318 /* Avoid endless recursion if a `source' command is contained
3320 if (executing_breakpoint_commands
)
3323 executing_breakpoint_commands
= 1;
3324 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
3326 prevent_dont_repeat ();
3328 /* This pointer will iterate over the list of bpstat's. */
3331 breakpoint_proceeded
= 0;
3332 for (; bs
!= NULL
; bs
= bs
->next
)
3334 struct counted_command_line
*ccmd
;
3335 struct command_line
*cmd
;
3336 struct cleanup
*this_cmd_tree_chain
;
3338 /* Take ownership of the BSP's command tree, if it has one.
3340 The command tree could legitimately contain commands like
3341 'step' and 'next', which call clear_proceed_status, which
3342 frees stop_bpstat's command tree. To make sure this doesn't
3343 free the tree we're executing out from under us, we need to
3344 take ownership of the tree ourselves. Since a given bpstat's
3345 commands are only executed once, we don't need to copy it; we
3346 can clear the pointer in the bpstat, and make sure we free
3347 the tree when we're done. */
3348 ccmd
= bs
->commands
;
3349 bs
->commands
= NULL
;
3350 this_cmd_tree_chain
= make_cleanup_decref_counted_command_line (&ccmd
);
3351 cmd
= ccmd
? ccmd
->commands
: NULL
;
3352 if (command_line_is_silent (cmd
))
3354 /* The action has been already done by bpstat_stop_status. */
3360 execute_control_command (cmd
);
3362 if (breakpoint_proceeded
)
3368 /* We can free this command tree now. */
3369 do_cleanups (this_cmd_tree_chain
);
3371 if (breakpoint_proceeded
)
3373 if (target_can_async_p ())
3374 /* If we are in async mode, then the target might be still
3375 running, not stopped at any breakpoint, so nothing for
3376 us to do here -- just return to the event loop. */
3379 /* In sync mode, when execute_control_command returns
3380 we're already standing on the next breakpoint.
3381 Breakpoint commands for that stop were not run, since
3382 execute_command does not run breakpoint commands --
3383 only command_line_handler does, but that one is not
3384 involved in execution of breakpoint commands. So, we
3385 can now execute breakpoint commands. It should be
3386 noted that making execute_command do bpstat actions is
3387 not an option -- in this case we'll have recursive
3388 invocation of bpstat for each breakpoint with a
3389 command, and can easily blow up GDB stack. Instead, we
3390 return true, which will trigger the caller to recall us
3391 with the new stop_bpstat. */
3396 do_cleanups (old_chain
);
3401 bpstat_do_actions (void)
3403 struct cleanup
*cleanup_if_error
= make_bpstat_clear_actions_cleanup ();
3405 /* Do any commands attached to breakpoint we are stopped at. */
3406 while (!ptid_equal (inferior_ptid
, null_ptid
)
3407 && target_has_execution
3408 && !is_exited (inferior_ptid
)
3409 && !is_executing (inferior_ptid
))
3410 /* Since in sync mode, bpstat_do_actions may resume the inferior,
3411 and only return when it is stopped at the next breakpoint, we
3412 keep doing breakpoint actions until it returns false to
3413 indicate the inferior was not resumed. */
3414 if (!bpstat_do_actions_1 (&inferior_thread ()->control
.stop_bpstat
))
3417 discard_cleanups (cleanup_if_error
);
3420 /* Print out the (old or new) value associated with a watchpoint. */
3423 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
3426 fprintf_unfiltered (stream
, _("<unreadable>"));
3429 struct value_print_options opts
;
3430 get_user_print_options (&opts
);
3431 value_print (val
, stream
, &opts
);
3435 /* Generic routine for printing messages indicating why we
3436 stopped. The behavior of this function depends on the value
3437 'print_it' in the bpstat structure. Under some circumstances we
3438 may decide not to print anything here and delegate the task to
3441 static enum print_stop_action
3442 print_bp_stop_message (bpstat bs
)
3444 switch (bs
->print_it
)
3447 /* Nothing should be printed for this bpstat entry. */
3448 return PRINT_UNKNOWN
;
3452 /* We still want to print the frame, but we already printed the
3453 relevant messages. */
3454 return PRINT_SRC_AND_LOC
;
3457 case print_it_normal
:
3459 struct breakpoint
*b
= bs
->breakpoint_at
;
3461 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
3462 which has since been deleted. */
3464 return PRINT_UNKNOWN
;
3466 /* Normal case. Call the breakpoint's print_it method. */
3467 return b
->ops
->print_it (bs
);
3472 internal_error (__FILE__
, __LINE__
,
3473 _("print_bp_stop_message: unrecognized enum value"));
3478 /* Print a message indicating what happened. This is called from
3479 normal_stop(). The input to this routine is the head of the bpstat
3480 list - a list of the eventpoints that caused this stop. KIND is
3481 the target_waitkind for the stopping event. This
3482 routine calls the generic print routine for printing a message
3483 about reasons for stopping. This will print (for example) the
3484 "Breakpoint n," part of the output. The return value of this
3487 PRINT_UNKNOWN: Means we printed nothing.
3488 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
3489 code to print the location. An example is
3490 "Breakpoint 1, " which should be followed by
3492 PRINT_SRC_ONLY: Means we printed something, but there is no need
3493 to also print the location part of the message.
3494 An example is the catch/throw messages, which
3495 don't require a location appended to the end.
3496 PRINT_NOTHING: We have done some printing and we don't need any
3497 further info to be printed. */
3499 enum print_stop_action
3500 bpstat_print (bpstat bs
, int kind
)
3504 /* Maybe another breakpoint in the chain caused us to stop.
3505 (Currently all watchpoints go on the bpstat whether hit or not.
3506 That probably could (should) be changed, provided care is taken
3507 with respect to bpstat_explains_signal). */
3508 for (; bs
; bs
= bs
->next
)
3510 val
= print_bp_stop_message (bs
);
3511 if (val
== PRINT_SRC_ONLY
3512 || val
== PRINT_SRC_AND_LOC
3513 || val
== PRINT_NOTHING
)
3517 /* If we had hit a shared library event breakpoint,
3518 print_bp_stop_message would print out this message. If we hit an
3519 OS-level shared library event, do the same thing. */
3520 if (kind
== TARGET_WAITKIND_LOADED
)
3522 ui_out_text (current_uiout
, _("Stopped due to shared library event\n"));
3523 if (ui_out_is_mi_like_p (current_uiout
))
3524 ui_out_field_string (current_uiout
, "reason",
3525 async_reason_lookup (EXEC_ASYNC_SOLIB_EVENT
));
3526 return PRINT_NOTHING
;
3529 /* We reached the end of the chain, or we got a null BS to start
3530 with and nothing was printed. */
3531 return PRINT_UNKNOWN
;
3534 /* Evaluate the expression EXP and return 1 if value is zero. This is
3535 used inside a catch_errors to evaluate the breakpoint condition.
3536 The argument is a "struct expression *" that has been cast to a
3537 "char *" to make it pass through catch_errors. */
3540 breakpoint_cond_eval (void *exp
)
3542 struct value
*mark
= value_mark ();
3543 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
3545 value_free_to_mark (mark
);
3549 /* Allocate a new bpstat. Link it to the FIFO list by BS_LINK_POINTER. */
3552 bpstat_alloc (struct bp_location
*bl
, bpstat
**bs_link_pointer
)
3556 bs
= (bpstat
) xmalloc (sizeof (*bs
));
3558 **bs_link_pointer
= bs
;
3559 *bs_link_pointer
= &bs
->next
;
3560 bs
->breakpoint_at
= bl
->owner
;
3561 bs
->bp_location_at
= bl
;
3562 incref_bp_location (bl
);
3563 /* If the condition is false, etc., don't do the commands. */
3564 bs
->commands
= NULL
;
3566 bs
->print_it
= print_it_normal
;
3570 /* The target has stopped with waitstatus WS. Check if any hardware
3571 watchpoints have triggered, according to the target. */
3574 watchpoints_triggered (struct target_waitstatus
*ws
)
3576 int stopped_by_watchpoint
= target_stopped_by_watchpoint ();
3578 struct breakpoint
*b
;
3580 if (!stopped_by_watchpoint
)
3582 /* We were not stopped by a watchpoint. Mark all watchpoints
3583 as not triggered. */
3585 if (is_hardware_watchpoint (b
))
3587 struct watchpoint
*w
= (struct watchpoint
*) b
;
3589 w
->watchpoint_triggered
= watch_triggered_no
;
3595 if (!target_stopped_data_address (¤t_target
, &addr
))
3597 /* We were stopped by a watchpoint, but we don't know where.
3598 Mark all watchpoints as unknown. */
3600 if (is_hardware_watchpoint (b
))
3602 struct watchpoint
*w
= (struct watchpoint
*) b
;
3604 w
->watchpoint_triggered
= watch_triggered_unknown
;
3607 return stopped_by_watchpoint
;
3610 /* The target could report the data address. Mark watchpoints
3611 affected by this data address as triggered, and all others as not
3615 if (is_hardware_watchpoint (b
))
3617 struct watchpoint
*w
= (struct watchpoint
*) b
;
3618 struct bp_location
*loc
;
3620 w
->watchpoint_triggered
= watch_triggered_no
;
3621 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
3623 if (is_masked_watchpoint (b
))
3625 CORE_ADDR newaddr
= addr
& w
->hw_wp_mask
;
3626 CORE_ADDR start
= loc
->address
& w
->hw_wp_mask
;
3628 if (newaddr
== start
)
3630 w
->watchpoint_triggered
= watch_triggered_yes
;
3634 /* Exact match not required. Within range is sufficient. */
3635 else if (target_watchpoint_addr_within_range (¤t_target
,
3639 w
->watchpoint_triggered
= watch_triggered_yes
;
3648 /* Possible return values for watchpoint_check (this can't be an enum
3649 because of check_errors). */
3650 /* The watchpoint has been deleted. */
3651 #define WP_DELETED 1
3652 /* The value has changed. */
3653 #define WP_VALUE_CHANGED 2
3654 /* The value has not changed. */
3655 #define WP_VALUE_NOT_CHANGED 3
3656 /* Ignore this watchpoint, no matter if the value changed or not. */
3659 #define BP_TEMPFLAG 1
3660 #define BP_HARDWAREFLAG 2
3662 /* Evaluate watchpoint condition expression and check if its value
3665 P should be a pointer to struct bpstat, but is defined as a void *
3666 in order for this function to be usable with catch_errors. */
3669 watchpoint_check (void *p
)
3671 bpstat bs
= (bpstat
) p
;
3672 struct watchpoint
*b
;
3673 struct frame_info
*fr
;
3674 int within_current_scope
;
3676 /* BS is built from an existing struct breakpoint. */
3677 gdb_assert (bs
->breakpoint_at
!= NULL
);
3678 b
= (struct watchpoint
*) bs
->breakpoint_at
;
3680 /* If this is a local watchpoint, we only want to check if the
3681 watchpoint frame is in scope if the current thread is the thread
3682 that was used to create the watchpoint. */
3683 if (!watchpoint_in_thread_scope (b
))
3686 if (b
->exp_valid_block
== NULL
)
3687 within_current_scope
= 1;
3690 struct frame_info
*frame
= get_current_frame ();
3691 struct gdbarch
*frame_arch
= get_frame_arch (frame
);
3692 CORE_ADDR frame_pc
= get_frame_pc (frame
);
3694 /* in_function_epilogue_p() returns a non-zero value if we're
3695 still in the function but the stack frame has already been
3696 invalidated. Since we can't rely on the values of local
3697 variables after the stack has been destroyed, we are treating
3698 the watchpoint in that state as `not changed' without further
3699 checking. Don't mark watchpoints as changed if the current
3700 frame is in an epilogue - even if they are in some other
3701 frame, our view of the stack is likely to be wrong and
3702 frame_find_by_id could error out. */
3703 if (gdbarch_in_function_epilogue_p (frame_arch
, frame_pc
))
3706 fr
= frame_find_by_id (b
->watchpoint_frame
);
3707 within_current_scope
= (fr
!= NULL
);
3709 /* If we've gotten confused in the unwinder, we might have
3710 returned a frame that can't describe this variable. */
3711 if (within_current_scope
)
3713 struct symbol
*function
;
3715 function
= get_frame_function (fr
);
3716 if (function
== NULL
3717 || !contained_in (b
->exp_valid_block
,
3718 SYMBOL_BLOCK_VALUE (function
)))
3719 within_current_scope
= 0;
3722 if (within_current_scope
)
3723 /* If we end up stopping, the current frame will get selected
3724 in normal_stop. So this call to select_frame won't affect
3729 if (within_current_scope
)
3731 /* We use value_{,free_to_}mark because it could be a *long*
3732 time before we return to the command level and call
3733 free_all_values. We can't call free_all_values because we
3734 might be in the middle of evaluating a function call. */
3738 struct value
*new_val
;
3740 if (is_masked_watchpoint (&b
->base
))
3741 /* Since we don't know the exact trigger address (from
3742 stopped_data_address), just tell the user we've triggered
3743 a mask watchpoint. */
3744 return WP_VALUE_CHANGED
;
3746 mark
= value_mark ();
3747 fetch_subexp_value (b
->exp
, &pc
, &new_val
, NULL
, NULL
);
3749 /* We use value_equal_contents instead of value_equal because
3750 the latter coerces an array to a pointer, thus comparing just
3751 the address of the array instead of its contents. This is
3752 not what we want. */
3753 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
3754 || (b
->val
!= NULL
&& !value_equal_contents (b
->val
, new_val
)))
3756 if (new_val
!= NULL
)
3758 release_value (new_val
);
3759 value_free_to_mark (mark
);
3761 bs
->old_val
= b
->val
;
3764 return WP_VALUE_CHANGED
;
3768 /* Nothing changed. */
3769 value_free_to_mark (mark
);
3770 return WP_VALUE_NOT_CHANGED
;
3775 struct ui_out
*uiout
= current_uiout
;
3777 /* This seems like the only logical thing to do because
3778 if we temporarily ignored the watchpoint, then when
3779 we reenter the block in which it is valid it contains
3780 garbage (in the case of a function, it may have two
3781 garbage values, one before and one after the prologue).
3782 So we can't even detect the first assignment to it and
3783 watch after that (since the garbage may or may not equal
3784 the first value assigned). */
3785 /* We print all the stop information in
3786 breakpoint_ops->print_it, but in this case, by the time we
3787 call breakpoint_ops->print_it this bp will be deleted
3788 already. So we have no choice but print the information
3790 if (ui_out_is_mi_like_p (uiout
))
3792 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
3793 ui_out_text (uiout
, "\nWatchpoint ");
3794 ui_out_field_int (uiout
, "wpnum", b
->base
.number
);
3796 " deleted because the program has left the block in\n\
3797 which its expression is valid.\n");
3799 /* Make sure the watchpoint's commands aren't executed. */
3800 decref_counted_command_line (&b
->base
.commands
);
3801 watchpoint_del_at_next_stop (b
);
3807 /* Return true if it looks like target has stopped due to hitting
3808 breakpoint location BL. This function does not check if we should
3809 stop, only if BL explains the stop. */
3812 bpstat_check_location (const struct bp_location
*bl
,
3813 struct address_space
*aspace
, CORE_ADDR bp_addr
)
3815 struct breakpoint
*b
= bl
->owner
;
3817 /* BL is from an existing breakpoint. */
3818 gdb_assert (b
!= NULL
);
3820 return b
->ops
->breakpoint_hit (bl
, aspace
, bp_addr
);
3823 /* Determine if the watched values have actually changed, and we
3824 should stop. If not, set BS->stop to 0. */
3827 bpstat_check_watchpoint (bpstat bs
)
3829 const struct bp_location
*bl
;
3830 struct watchpoint
*b
;
3832 /* BS is built for existing struct breakpoint. */
3833 bl
= bs
->bp_location_at
;
3834 gdb_assert (bl
!= NULL
);
3835 b
= (struct watchpoint
*) bs
->breakpoint_at
;
3836 gdb_assert (b
!= NULL
);
3839 int must_check_value
= 0;
3841 if (b
->base
.type
== bp_watchpoint
)
3842 /* For a software watchpoint, we must always check the
3844 must_check_value
= 1;
3845 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
3846 /* We have a hardware watchpoint (read, write, or access)
3847 and the target earlier reported an address watched by
3849 must_check_value
= 1;
3850 else if (b
->watchpoint_triggered
== watch_triggered_unknown
3851 && b
->base
.type
== bp_hardware_watchpoint
)
3852 /* We were stopped by a hardware watchpoint, but the target could
3853 not report the data address. We must check the watchpoint's
3854 value. Access and read watchpoints are out of luck; without
3855 a data address, we can't figure it out. */
3856 must_check_value
= 1;
3858 if (must_check_value
)
3861 = xstrprintf ("Error evaluating expression for watchpoint %d\n",
3863 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
3864 int e
= catch_errors (watchpoint_check
, bs
, message
,
3866 do_cleanups (cleanups
);
3870 /* We've already printed what needs to be printed. */
3871 bs
->print_it
= print_it_done
;
3875 bs
->print_it
= print_it_noop
;
3878 case WP_VALUE_CHANGED
:
3879 if (b
->base
.type
== bp_read_watchpoint
)
3881 /* There are two cases to consider here:
3883 1. We're watching the triggered memory for reads.
3884 In that case, trust the target, and always report
3885 the watchpoint hit to the user. Even though
3886 reads don't cause value changes, the value may
3887 have changed since the last time it was read, and
3888 since we're not trapping writes, we will not see
3889 those, and as such we should ignore our notion of
3892 2. We're watching the triggered memory for both
3893 reads and writes. There are two ways this may
3896 2.1. This is a target that can't break on data
3897 reads only, but can break on accesses (reads or
3898 writes), such as e.g., x86. We detect this case
3899 at the time we try to insert read watchpoints.
3901 2.2. Otherwise, the target supports read
3902 watchpoints, but, the user set an access or write
3903 watchpoint watching the same memory as this read
3906 If we're watching memory writes as well as reads,
3907 ignore watchpoint hits when we find that the
3908 value hasn't changed, as reads don't cause
3909 changes. This still gives false positives when
3910 the program writes the same value to memory as
3911 what there was already in memory (we will confuse
3912 it for a read), but it's much better than
3915 int other_write_watchpoint
= 0;
3917 if (bl
->watchpoint_type
== hw_read
)
3919 struct breakpoint
*other_b
;
3921 ALL_BREAKPOINTS (other_b
)
3922 if (other_b
->type
== bp_hardware_watchpoint
3923 || other_b
->type
== bp_access_watchpoint
)
3925 struct watchpoint
*other_w
=
3926 (struct watchpoint
*) other_b
;
3928 if (other_w
->watchpoint_triggered
3929 == watch_triggered_yes
)
3931 other_write_watchpoint
= 1;
3937 if (other_write_watchpoint
3938 || bl
->watchpoint_type
== hw_access
)
3940 /* We're watching the same memory for writes,
3941 and the value changed since the last time we
3942 updated it, so this trap must be for a write.
3944 bs
->print_it
= print_it_noop
;
3949 case WP_VALUE_NOT_CHANGED
:
3950 if (b
->base
.type
== bp_hardware_watchpoint
3951 || b
->base
.type
== bp_watchpoint
)
3953 /* Don't stop: write watchpoints shouldn't fire if
3954 the value hasn't changed. */
3955 bs
->print_it
= print_it_noop
;
3963 /* Error from catch_errors. */
3964 printf_filtered (_("Watchpoint %d deleted.\n"), b
->base
.number
);
3965 watchpoint_del_at_next_stop (b
);
3966 /* We've already printed what needs to be printed. */
3967 bs
->print_it
= print_it_done
;
3971 else /* must_check_value == 0 */
3973 /* This is a case where some watchpoint(s) triggered, but
3974 not at the address of this watchpoint, or else no
3975 watchpoint triggered after all. So don't print
3976 anything for this watchpoint. */
3977 bs
->print_it
= print_it_noop
;
3984 /* Check conditions (condition proper, frame, thread and ignore count)
3985 of breakpoint referred to by BS. If we should not stop for this
3986 breakpoint, set BS->stop to 0. */
3989 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
3991 int thread_id
= pid_to_thread_id (ptid
);
3992 const struct bp_location
*bl
;
3993 struct breakpoint
*b
;
3995 /* BS is built for existing struct breakpoint. */
3996 bl
= bs
->bp_location_at
;
3997 gdb_assert (bl
!= NULL
);
3998 b
= bs
->breakpoint_at
;
3999 gdb_assert (b
!= NULL
);
4001 if (frame_id_p (b
->frame_id
)
4002 && !frame_id_eq (b
->frame_id
, get_stack_frame_id (get_current_frame ())))
4006 int value_is_zero
= 0;
4007 struct expression
*cond
;
4009 /* Evaluate Python breakpoints that have a "stop"
4010 method implemented. */
4011 if (b
->py_bp_object
)
4012 bs
->stop
= gdbpy_should_stop (b
->py_bp_object
);
4014 if (is_watchpoint (b
))
4016 struct watchpoint
*w
= (struct watchpoint
*) b
;
4023 if (cond
&& b
->disposition
!= disp_del_at_next_stop
)
4025 int within_current_scope
= 1;
4026 struct watchpoint
* w
;
4028 /* We use value_mark and value_free_to_mark because it could
4029 be a long time before we return to the command level and
4030 call free_all_values. We can't call free_all_values
4031 because we might be in the middle of evaluating a
4033 struct value
*mark
= value_mark ();
4035 if (is_watchpoint (b
))
4036 w
= (struct watchpoint
*) b
;
4040 /* Need to select the frame, with all that implies so that
4041 the conditions will have the right context. Because we
4042 use the frame, we will not see an inlined function's
4043 variables when we arrive at a breakpoint at the start
4044 of the inlined function; the current frame will be the
4046 if (w
== NULL
|| w
->cond_exp_valid_block
== NULL
)
4047 select_frame (get_current_frame ());
4050 struct frame_info
*frame
;
4052 /* For local watchpoint expressions, which particular
4053 instance of a local is being watched matters, so we
4054 keep track of the frame to evaluate the expression
4055 in. To evaluate the condition however, it doesn't
4056 really matter which instantiation of the function
4057 where the condition makes sense triggers the
4058 watchpoint. This allows an expression like "watch
4059 global if q > 10" set in `func', catch writes to
4060 global on all threads that call `func', or catch
4061 writes on all recursive calls of `func' by a single
4062 thread. We simply always evaluate the condition in
4063 the innermost frame that's executing where it makes
4064 sense to evaluate the condition. It seems
4066 frame
= block_innermost_frame (w
->cond_exp_valid_block
);
4068 select_frame (frame
);
4070 within_current_scope
= 0;
4072 if (within_current_scope
)
4074 = catch_errors (breakpoint_cond_eval
, cond
,
4075 "Error in testing breakpoint condition:\n",
4079 warning (_("Watchpoint condition cannot be tested "
4080 "in the current scope"));
4081 /* If we failed to set the right context for this
4082 watchpoint, unconditionally report it. */
4085 /* FIXME-someday, should give breakpoint #. */
4086 value_free_to_mark (mark
);
4089 if (cond
&& value_is_zero
)
4093 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
4097 else if (b
->ignore_count
> 0)
4100 annotate_ignore_count_change ();
4102 /* Increase the hit count even though we don't stop. */
4104 observer_notify_breakpoint_modified (b
);
4110 /* Get a bpstat associated with having just stopped at address
4111 BP_ADDR in thread PTID.
4113 Determine whether we stopped at a breakpoint, etc, or whether we
4114 don't understand this stop. Result is a chain of bpstat's such
4117 if we don't understand the stop, the result is a null pointer.
4119 if we understand why we stopped, the result is not null.
4121 Each element of the chain refers to a particular breakpoint or
4122 watchpoint at which we have stopped. (We may have stopped for
4123 several reasons concurrently.)
4125 Each element of the chain has valid next, breakpoint_at,
4126 commands, FIXME??? fields. */
4129 bpstat_stop_status (struct address_space
*aspace
,
4130 CORE_ADDR bp_addr
, ptid_t ptid
)
4132 struct breakpoint
*b
= NULL
;
4133 struct bp_location
*bl
;
4134 struct bp_location
*loc
;
4135 /* First item of allocated bpstat's. */
4136 bpstat bs_head
= NULL
, *bs_link
= &bs_head
;
4137 /* Pointer to the last thing in the chain currently. */
4140 int need_remove_insert
;
4143 /* First, build the bpstat chain with locations that explain a
4144 target stop, while being careful to not set the target running,
4145 as that may invalidate locations (in particular watchpoint
4146 locations are recreated). Resuming will happen here with
4147 breakpoint conditions or watchpoint expressions that include
4148 inferior function calls. */
4152 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
4155 for (bl
= b
->loc
; bl
!= NULL
; bl
= bl
->next
)
4157 /* For hardware watchpoints, we look only at the first
4158 location. The watchpoint_check function will work on the
4159 entire expression, not the individual locations. For
4160 read watchpoints, the watchpoints_triggered function has
4161 checked all locations already. */
4162 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
4165 if (bl
->shlib_disabled
)
4168 if (!bpstat_check_location (bl
, aspace
, bp_addr
))
4171 /* Come here if it's a watchpoint, or if the break address
4174 bs
= bpstat_alloc (bl
, &bs_link
); /* Alloc a bpstat to
4177 /* Assume we stop. Should we find a watchpoint that is not
4178 actually triggered, or if the condition of the breakpoint
4179 evaluates as false, we'll reset 'stop' to 0. */
4183 /* If this is a scope breakpoint, mark the associated
4184 watchpoint as triggered so that we will handle the
4185 out-of-scope event. We'll get to the watchpoint next
4187 if (b
->type
== bp_watchpoint_scope
&& b
->related_breakpoint
!= b
)
4189 struct watchpoint
*w
= (struct watchpoint
*) b
->related_breakpoint
;
4191 w
->watchpoint_triggered
= watch_triggered_yes
;
4196 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
4198 if (breakpoint_location_address_match (loc
, aspace
, bp_addr
))
4200 bs
= bpstat_alloc (loc
, &bs_link
);
4201 /* For hits of moribund locations, we should just proceed. */
4204 bs
->print_it
= print_it_noop
;
4208 /* Now go through the locations that caused the target to stop, and
4209 check whether we're interested in reporting this stop to higher
4210 layers, or whether we should resume the target transparently. */
4214 for (bs
= bs_head
; bs
!= NULL
; bs
= bs
->next
)
4219 b
= bs
->breakpoint_at
;
4220 b
->ops
->check_status (bs
);
4223 bpstat_check_breakpoint_conditions (bs
, ptid
);
4228 observer_notify_breakpoint_modified (b
);
4230 /* We will stop here. */
4231 if (b
->disposition
== disp_disable
)
4233 if (b
->enable_state
!= bp_permanent
)
4234 b
->enable_state
= bp_disabled
;
4239 bs
->commands
= b
->commands
;
4240 incref_counted_command_line (bs
->commands
);
4241 if (command_line_is_silent (bs
->commands
4242 ? bs
->commands
->commands
: NULL
))
4246 /* Print nothing for this entry if we don't stop or don't print. */
4247 if (bs
->stop
== 0 || bs
->print
== 0)
4248 bs
->print_it
= print_it_noop
;
4252 /* If we aren't stopping, the value of some hardware watchpoint may
4253 not have changed, but the intermediate memory locations we are
4254 watching may have. Don't bother if we're stopping; this will get
4256 need_remove_insert
= 0;
4257 if (! bpstat_causes_stop (bs_head
))
4258 for (bs
= bs_head
; bs
!= NULL
; bs
= bs
->next
)
4260 && bs
->breakpoint_at
4261 && is_hardware_watchpoint (bs
->breakpoint_at
))
4263 struct watchpoint
*w
= (struct watchpoint
*) bs
->breakpoint_at
;
4265 update_watchpoint (w
, 0 /* don't reparse. */);
4266 need_remove_insert
= 1;
4269 if (need_remove_insert
)
4270 update_global_location_list (1);
4271 else if (removed_any
)
4272 update_global_location_list (0);
4278 handle_jit_event (void)
4280 struct frame_info
*frame
;
4281 struct gdbarch
*gdbarch
;
4283 /* Switch terminal for any messages produced by
4284 breakpoint_re_set. */
4285 target_terminal_ours_for_output ();
4287 frame
= get_current_frame ();
4288 gdbarch
= get_frame_arch (frame
);
4290 jit_event_handler (gdbarch
);
4292 target_terminal_inferior ();
4295 /* Prepare WHAT final decision for infrun. */
4297 /* Decide what infrun needs to do with this bpstat. */
4300 bpstat_what (bpstat bs_head
)
4302 struct bpstat_what retval
;
4303 /* We need to defer calling `solib_add', as adding new symbols
4304 resets breakpoints, which in turn deletes breakpoint locations,
4305 and hence may clear unprocessed entries in the BS chain. */
4306 int shlib_event
= 0;
4310 retval
.main_action
= BPSTAT_WHAT_KEEP_CHECKING
;
4311 retval
.call_dummy
= STOP_NONE
;
4312 retval
.is_longjmp
= 0;
4314 for (bs
= bs_head
; bs
!= NULL
; bs
= bs
->next
)
4316 /* Extract this BS's action. After processing each BS, we check
4317 if its action overrides all we've seem so far. */
4318 enum bpstat_what_main_action this_action
= BPSTAT_WHAT_KEEP_CHECKING
;
4321 if (bs
->breakpoint_at
== NULL
)
4323 /* I suspect this can happen if it was a momentary
4324 breakpoint which has since been deleted. */
4328 bptype
= bs
->breakpoint_at
->type
;
4335 case bp_hardware_breakpoint
:
4341 this_action
= BPSTAT_WHAT_STOP_NOISY
;
4343 this_action
= BPSTAT_WHAT_STOP_SILENT
;
4346 this_action
= BPSTAT_WHAT_SINGLE
;
4349 case bp_hardware_watchpoint
:
4350 case bp_read_watchpoint
:
4351 case bp_access_watchpoint
:
4355 this_action
= BPSTAT_WHAT_STOP_NOISY
;
4357 this_action
= BPSTAT_WHAT_STOP_SILENT
;
4361 /* There was a watchpoint, but we're not stopping.
4362 This requires no further action. */
4367 this_action
= BPSTAT_WHAT_SET_LONGJMP_RESUME
;
4368 retval
.is_longjmp
= bptype
== bp_longjmp
;
4370 case bp_longjmp_resume
:
4371 case bp_exception_resume
:
4372 this_action
= BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
;
4373 retval
.is_longjmp
= bptype
== bp_longjmp_resume
;
4375 case bp_step_resume
:
4377 this_action
= BPSTAT_WHAT_STEP_RESUME
;
4380 /* It is for the wrong frame. */
4381 this_action
= BPSTAT_WHAT_SINGLE
;
4384 case bp_hp_step_resume
:
4386 this_action
= BPSTAT_WHAT_HP_STEP_RESUME
;
4389 /* It is for the wrong frame. */
4390 this_action
= BPSTAT_WHAT_SINGLE
;
4393 case bp_watchpoint_scope
:
4394 case bp_thread_event
:
4395 case bp_overlay_event
:
4396 case bp_longjmp_master
:
4397 case bp_std_terminate_master
:
4398 case bp_exception_master
:
4399 this_action
= BPSTAT_WHAT_SINGLE
;
4405 this_action
= BPSTAT_WHAT_STOP_NOISY
;
4407 this_action
= BPSTAT_WHAT_STOP_SILENT
;
4411 /* There was a catchpoint, but we're not stopping.
4412 This requires no further action. */
4415 case bp_shlib_event
:
4418 /* If requested, stop when the dynamic linker notifies GDB
4419 of events. This allows the user to get control and place
4420 breakpoints in initializer routines for dynamically
4421 loaded objects (among other things). */
4422 if (stop_on_solib_events
)
4423 this_action
= BPSTAT_WHAT_STOP_NOISY
;
4425 this_action
= BPSTAT_WHAT_SINGLE
;
4429 this_action
= BPSTAT_WHAT_SINGLE
;
4432 /* Make sure the action is stop (silent or noisy),
4433 so infrun.c pops the dummy frame. */
4434 retval
.call_dummy
= STOP_STACK_DUMMY
;
4435 this_action
= BPSTAT_WHAT_STOP_SILENT
;
4437 case bp_std_terminate
:
4438 /* Make sure the action is stop (silent or noisy),
4439 so infrun.c pops the dummy frame. */
4440 retval
.call_dummy
= STOP_STD_TERMINATE
;
4441 this_action
= BPSTAT_WHAT_STOP_SILENT
;
4444 case bp_fast_tracepoint
:
4445 case bp_static_tracepoint
:
4446 /* Tracepoint hits should not be reported back to GDB, and
4447 if one got through somehow, it should have been filtered
4449 internal_error (__FILE__
, __LINE__
,
4450 _("bpstat_what: tracepoint encountered"));
4452 case bp_gnu_ifunc_resolver
:
4453 /* Step over it (and insert bp_gnu_ifunc_resolver_return). */
4454 this_action
= BPSTAT_WHAT_SINGLE
;
4456 case bp_gnu_ifunc_resolver_return
:
4457 /* The breakpoint will be removed, execution will restart from the
4458 PC of the former breakpoint. */
4459 this_action
= BPSTAT_WHAT_KEEP_CHECKING
;
4462 internal_error (__FILE__
, __LINE__
,
4463 _("bpstat_what: unhandled bptype %d"), (int) bptype
);
4466 retval
.main_action
= max (retval
.main_action
, this_action
);
4469 /* These operations may affect the bs->breakpoint_at state so they are
4470 delayed after MAIN_ACTION is decided above. */
4475 fprintf_unfiltered (gdb_stdlog
, "bpstat_what: bp_shlib_event\n");
4477 /* Check for any newly added shared libraries if we're supposed
4478 to be adding them automatically. */
4480 /* Switch terminal for any messages produced by
4481 breakpoint_re_set. */
4482 target_terminal_ours_for_output ();
4485 SOLIB_ADD (NULL
, 0, ¤t_target
, auto_solib_add
);
4487 solib_add (NULL
, 0, ¤t_target
, auto_solib_add
);
4490 target_terminal_inferior ();
4496 fprintf_unfiltered (gdb_stdlog
, "bpstat_what: bp_jit_event\n");
4498 handle_jit_event ();
4501 for (bs
= bs_head
; bs
!= NULL
; bs
= bs
->next
)
4503 struct breakpoint
*b
= bs
->breakpoint_at
;
4509 case bp_gnu_ifunc_resolver
:
4510 gnu_ifunc_resolver_stop (b
);
4512 case bp_gnu_ifunc_resolver_return
:
4513 gnu_ifunc_resolver_return_stop (b
);
4521 /* Nonzero if we should step constantly (e.g. watchpoints on machines
4522 without hardware support). This isn't related to a specific bpstat,
4523 just to things like whether watchpoints are set. */
4526 bpstat_should_step (void)
4528 struct breakpoint
*b
;
4531 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
&& b
->loc
!= NULL
)
4537 bpstat_causes_stop (bpstat bs
)
4539 for (; bs
!= NULL
; bs
= bs
->next
)
4548 /* Compute a string of spaces suitable to indent the next line
4549 so it starts at the position corresponding to the table column
4550 named COL_NAME in the currently active table of UIOUT. */
4553 wrap_indent_at_field (struct ui_out
*uiout
, const char *col_name
)
4555 static char wrap_indent
[80];
4556 int i
, total_width
, width
, align
;
4560 for (i
= 1; ui_out_query_field (uiout
, i
, &width
, &align
, &text
); i
++)
4562 if (strcmp (text
, col_name
) == 0)
4564 gdb_assert (total_width
< sizeof wrap_indent
);
4565 memset (wrap_indent
, ' ', total_width
);
4566 wrap_indent
[total_width
] = 0;
4571 total_width
+= width
+ 1;
4577 /* Print the LOC location out of the list of B->LOC locations. */
4580 print_breakpoint_location (struct breakpoint
*b
,
4581 struct bp_location
*loc
)
4583 struct ui_out
*uiout
= current_uiout
;
4584 struct cleanup
*old_chain
= save_current_program_space ();
4586 if (loc
!= NULL
&& loc
->shlib_disabled
)
4590 set_current_program_space (loc
->pspace
);
4592 if (b
->display_canonical
)
4593 ui_out_field_string (uiout
, "what", b
->addr_string
);
4594 else if (loc
&& loc
->source_file
)
4597 = find_pc_sect_function (loc
->address
, loc
->section
);
4600 ui_out_text (uiout
, "in ");
4601 ui_out_field_string (uiout
, "func",
4602 SYMBOL_PRINT_NAME (sym
));
4603 ui_out_text (uiout
, " ");
4604 ui_out_wrap_hint (uiout
, wrap_indent_at_field (uiout
, "what"));
4605 ui_out_text (uiout
, "at ");
4607 ui_out_field_string (uiout
, "file", loc
->source_file
);
4608 ui_out_text (uiout
, ":");
4610 if (ui_out_is_mi_like_p (uiout
))
4612 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
4613 char *fullname
= symtab_to_fullname (sal
.symtab
);
4616 ui_out_field_string (uiout
, "fullname", fullname
);
4619 ui_out_field_int (uiout
, "line", loc
->line_number
);
4623 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
4624 struct cleanup
*stb_chain
= make_cleanup_ui_out_stream_delete (stb
);
4626 print_address_symbolic (loc
->gdbarch
, loc
->address
, stb
->stream
,
4628 ui_out_field_stream (uiout
, "at", stb
);
4630 do_cleanups (stb_chain
);
4633 ui_out_field_string (uiout
, "pending", b
->addr_string
);
4635 do_cleanups (old_chain
);
4639 bptype_string (enum bptype type
)
4641 struct ep_type_description
4646 static struct ep_type_description bptypes
[] =
4648 {bp_none
, "?deleted?"},
4649 {bp_breakpoint
, "breakpoint"},
4650 {bp_hardware_breakpoint
, "hw breakpoint"},
4651 {bp_until
, "until"},
4652 {bp_finish
, "finish"},
4653 {bp_watchpoint
, "watchpoint"},
4654 {bp_hardware_watchpoint
, "hw watchpoint"},
4655 {bp_read_watchpoint
, "read watchpoint"},
4656 {bp_access_watchpoint
, "acc watchpoint"},
4657 {bp_longjmp
, "longjmp"},
4658 {bp_longjmp_resume
, "longjmp resume"},
4659 {bp_exception
, "exception"},
4660 {bp_exception_resume
, "exception resume"},
4661 {bp_step_resume
, "step resume"},
4662 {bp_hp_step_resume
, "high-priority step resume"},
4663 {bp_watchpoint_scope
, "watchpoint scope"},
4664 {bp_call_dummy
, "call dummy"},
4665 {bp_std_terminate
, "std::terminate"},
4666 {bp_shlib_event
, "shlib events"},
4667 {bp_thread_event
, "thread events"},
4668 {bp_overlay_event
, "overlay events"},
4669 {bp_longjmp_master
, "longjmp master"},
4670 {bp_std_terminate_master
, "std::terminate master"},
4671 {bp_exception_master
, "exception master"},
4672 {bp_catchpoint
, "catchpoint"},
4673 {bp_tracepoint
, "tracepoint"},
4674 {bp_fast_tracepoint
, "fast tracepoint"},
4675 {bp_static_tracepoint
, "static tracepoint"},
4676 {bp_jit_event
, "jit events"},
4677 {bp_gnu_ifunc_resolver
, "STT_GNU_IFUNC resolver"},
4678 {bp_gnu_ifunc_resolver_return
, "STT_GNU_IFUNC resolver return"},
4681 if (((int) type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
4682 || ((int) type
!= bptypes
[(int) type
].type
))
4683 internal_error (__FILE__
, __LINE__
,
4684 _("bptypes table does not describe type #%d."),
4687 return bptypes
[(int) type
].description
;
4690 /* Print B to gdb_stdout. */
4693 print_one_breakpoint_location (struct breakpoint
*b
,
4694 struct bp_location
*loc
,
4696 struct bp_location
**last_loc
,
4699 struct command_line
*l
;
4700 static char bpenables
[] = "nynny";
4702 struct ui_out
*uiout
= current_uiout
;
4703 int header_of_multiple
= 0;
4704 int part_of_multiple
= (loc
!= NULL
);
4705 struct value_print_options opts
;
4707 get_user_print_options (&opts
);
4709 gdb_assert (!loc
|| loc_number
!= 0);
4710 /* See comment in print_one_breakpoint concerning treatment of
4711 breakpoints with single disabled location. */
4714 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
4715 header_of_multiple
= 1;
4723 if (part_of_multiple
)
4726 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
4727 ui_out_field_string (uiout
, "number", formatted
);
4732 ui_out_field_int (uiout
, "number", b
->number
);
4737 if (part_of_multiple
)
4738 ui_out_field_skip (uiout
, "type");
4740 ui_out_field_string (uiout
, "type", bptype_string (b
->type
));
4744 if (part_of_multiple
)
4745 ui_out_field_skip (uiout
, "disp");
4747 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
4752 if (part_of_multiple
)
4753 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
4755 ui_out_field_fmt (uiout
, "enabled", "%c",
4756 bpenables
[(int) b
->enable_state
]);
4757 ui_out_spaces (uiout
, 2);
4761 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
4763 /* Although the print_one can possibly print all locations,
4764 calling it here is not likely to get any nice result. So,
4765 make sure there's just one location. */
4766 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
4767 b
->ops
->print_one (b
, last_loc
);
4773 internal_error (__FILE__
, __LINE__
,
4774 _("print_one_breakpoint: bp_none encountered\n"));
4778 case bp_hardware_watchpoint
:
4779 case bp_read_watchpoint
:
4780 case bp_access_watchpoint
:
4782 struct watchpoint
*w
= (struct watchpoint
*) b
;
4784 /* Field 4, the address, is omitted (which makes the columns
4785 not line up too nicely with the headers, but the effect
4786 is relatively readable). */
4787 if (opts
.addressprint
)
4788 ui_out_field_skip (uiout
, "addr");
4790 ui_out_field_string (uiout
, "what", w
->exp_string
);
4795 case bp_hardware_breakpoint
:
4799 case bp_longjmp_resume
:
4801 case bp_exception_resume
:
4802 case bp_step_resume
:
4803 case bp_hp_step_resume
:
4804 case bp_watchpoint_scope
:
4806 case bp_std_terminate
:
4807 case bp_shlib_event
:
4808 case bp_thread_event
:
4809 case bp_overlay_event
:
4810 case bp_longjmp_master
:
4811 case bp_std_terminate_master
:
4812 case bp_exception_master
:
4814 case bp_fast_tracepoint
:
4815 case bp_static_tracepoint
:
4817 case bp_gnu_ifunc_resolver
:
4818 case bp_gnu_ifunc_resolver_return
:
4819 if (opts
.addressprint
)
4822 if (header_of_multiple
)
4823 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
4824 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
4825 ui_out_field_string (uiout
, "addr", "<PENDING>");
4827 ui_out_field_core_addr (uiout
, "addr",
4828 loc
->gdbarch
, loc
->address
);
4831 if (!header_of_multiple
)
4832 print_breakpoint_location (b
, loc
);
4839 /* For backward compatibility, don't display inferiors unless there
4842 && !header_of_multiple
4844 || (!gdbarch_has_global_breakpoints (target_gdbarch
)
4845 && (number_of_program_spaces () > 1
4846 || number_of_inferiors () > 1)
4847 /* LOC is for existing B, it cannot be in
4848 moribund_locations and thus having NULL OWNER. */
4849 && loc
->owner
->type
!= bp_catchpoint
)))
4851 struct inferior
*inf
;
4854 for (inf
= inferior_list
; inf
!= NULL
; inf
= inf
->next
)
4856 if (inf
->pspace
== loc
->pspace
)
4861 ui_out_text (uiout
, " inf ");
4864 ui_out_text (uiout
, ", ");
4865 ui_out_text (uiout
, plongest (inf
->num
));
4870 if (!part_of_multiple
)
4872 if (b
->thread
!= -1)
4874 /* FIXME: This seems to be redundant and lost here; see the
4875 "stop only in" line a little further down. */
4876 ui_out_text (uiout
, " thread ");
4877 ui_out_field_int (uiout
, "thread", b
->thread
);
4879 else if (b
->task
!= 0)
4881 ui_out_text (uiout
, " task ");
4882 ui_out_field_int (uiout
, "task", b
->task
);
4886 ui_out_text (uiout
, "\n");
4888 if (!part_of_multiple
)
4889 b
->ops
->print_one_detail (b
, uiout
);
4891 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
4894 ui_out_text (uiout
, "\tstop only in stack frame at ");
4895 /* FIXME: cagney/2002-12-01: Shouldn't be poking around inside
4897 ui_out_field_core_addr (uiout
, "frame",
4898 b
->gdbarch
, b
->frame_id
.stack_addr
);
4899 ui_out_text (uiout
, "\n");
4902 if (!part_of_multiple
&& b
->cond_string
)
4905 if (is_tracepoint (b
))
4906 ui_out_text (uiout
, "\ttrace only if ");
4908 ui_out_text (uiout
, "\tstop only if ");
4909 ui_out_field_string (uiout
, "cond", b
->cond_string
);
4910 ui_out_text (uiout
, "\n");
4913 if (!part_of_multiple
&& b
->thread
!= -1)
4915 /* FIXME should make an annotation for this. */
4916 ui_out_text (uiout
, "\tstop only in thread ");
4917 ui_out_field_int (uiout
, "thread", b
->thread
);
4918 ui_out_text (uiout
, "\n");
4921 if (!part_of_multiple
&& b
->hit_count
)
4923 /* FIXME should make an annotation for this. */
4924 if (ep_is_catchpoint (b
))
4925 ui_out_text (uiout
, "\tcatchpoint");
4926 else if (is_tracepoint (b
))
4927 ui_out_text (uiout
, "\ttracepoint");
4929 ui_out_text (uiout
, "\tbreakpoint");
4930 ui_out_text (uiout
, " already hit ");
4931 ui_out_field_int (uiout
, "times", b
->hit_count
);
4932 if (b
->hit_count
== 1)
4933 ui_out_text (uiout
, " time\n");
4935 ui_out_text (uiout
, " times\n");
4938 /* Output the count also if it is zero, but only if this is mi.
4939 FIXME: Should have a better test for this. */
4940 if (ui_out_is_mi_like_p (uiout
))
4941 if (!part_of_multiple
&& b
->hit_count
== 0)
4942 ui_out_field_int (uiout
, "times", b
->hit_count
);
4944 if (!part_of_multiple
&& b
->ignore_count
)
4947 ui_out_text (uiout
, "\tignore next ");
4948 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
4949 ui_out_text (uiout
, " hits\n");
4952 if (!part_of_multiple
&& is_tracepoint (b
))
4954 struct tracepoint
*tp
= (struct tracepoint
*) b
;
4956 if (tp
->traceframe_usage
)
4958 ui_out_text (uiout
, "\ttrace buffer usage ");
4959 ui_out_field_int (uiout
, "traceframe-usage", tp
->traceframe_usage
);
4960 ui_out_text (uiout
, " bytes\n");
4964 l
= b
->commands
? b
->commands
->commands
: NULL
;
4965 if (!part_of_multiple
&& l
)
4967 struct cleanup
*script_chain
;
4970 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
4971 print_command_lines (uiout
, l
, 4);
4972 do_cleanups (script_chain
);
4975 if (is_tracepoint (b
))
4977 struct tracepoint
*t
= (struct tracepoint
*) b
;
4979 if (!part_of_multiple
&& t
->pass_count
)
4981 annotate_field (10);
4982 ui_out_text (uiout
, "\tpass count ");
4983 ui_out_field_int (uiout
, "pass", t
->pass_count
);
4984 ui_out_text (uiout
, " \n");
4988 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
4990 if (is_watchpoint (b
))
4992 struct watchpoint
*w
= (struct watchpoint
*) b
;
4994 ui_out_field_string (uiout
, "original-location", w
->exp_string
);
4996 else if (b
->addr_string
)
4997 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
5002 print_one_breakpoint (struct breakpoint
*b
,
5003 struct bp_location
**last_loc
,
5006 struct cleanup
*bkpt_chain
;
5007 struct ui_out
*uiout
= current_uiout
;
5009 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
5011 print_one_breakpoint_location (b
, NULL
, 0, last_loc
, allflag
);
5012 do_cleanups (bkpt_chain
);
5014 /* If this breakpoint has custom print function,
5015 it's already printed. Otherwise, print individual
5016 locations, if any. */
5017 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
5019 /* If breakpoint has a single location that is disabled, we
5020 print it as if it had several locations, since otherwise it's
5021 hard to represent "breakpoint enabled, location disabled"
5024 Note that while hardware watchpoints have several locations
5025 internally, that's not a property exposed to user. */
5027 && !is_hardware_watchpoint (b
)
5028 && (b
->loc
->next
|| !b
->loc
->enabled
))
5030 struct bp_location
*loc
;
5033 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
5035 struct cleanup
*inner2
=
5036 make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
5037 print_one_breakpoint_location (b
, loc
, n
, last_loc
, allflag
);
5038 do_cleanups (inner2
);
5045 breakpoint_address_bits (struct breakpoint
*b
)
5047 int print_address_bits
= 0;
5048 struct bp_location
*loc
;
5050 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
5054 /* Software watchpoints that aren't watching memory don't have
5055 an address to print. */
5056 if (b
->type
== bp_watchpoint
&& loc
->watchpoint_type
== -1)
5059 addr_bit
= gdbarch_addr_bit (loc
->gdbarch
);
5060 if (addr_bit
> print_address_bits
)
5061 print_address_bits
= addr_bit
;
5064 return print_address_bits
;
5067 struct captured_breakpoint_query_args
5073 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
5075 struct captured_breakpoint_query_args
*args
= data
;
5076 struct breakpoint
*b
;
5077 struct bp_location
*dummy_loc
= NULL
;
5081 if (args
->bnum
== b
->number
)
5083 print_one_breakpoint (b
, &dummy_loc
, 0);
5091 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
,
5092 char **error_message
)
5094 struct captured_breakpoint_query_args args
;
5097 /* For the moment we don't trust print_one_breakpoint() to not throw
5099 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
5100 error_message
, RETURN_MASK_ALL
) < 0)
5106 /* Return true if this breakpoint was set by the user, false if it is
5107 internal or momentary. */
5110 user_breakpoint_p (struct breakpoint
*b
)
5112 return b
->number
> 0;
5115 /* Print information on user settable breakpoint (watchpoint, etc)
5116 number BNUM. If BNUM is -1 print all user-settable breakpoints.
5117 If ALLFLAG is non-zero, include non-user-settable breakpoints. If
5118 FILTER is non-NULL, call it on each breakpoint and only include the
5119 ones for which it returns non-zero. Return the total number of
5120 breakpoints listed. */
5123 breakpoint_1 (char *args
, int allflag
,
5124 int (*filter
) (const struct breakpoint
*))
5126 struct breakpoint
*b
;
5127 struct bp_location
*last_loc
= NULL
;
5128 int nr_printable_breakpoints
;
5129 struct cleanup
*bkpttbl_chain
;
5130 struct value_print_options opts
;
5131 int print_address_bits
= 0;
5132 int print_type_col_width
= 14;
5133 struct ui_out
*uiout
= current_uiout
;
5135 get_user_print_options (&opts
);
5137 /* Compute the number of rows in the table, as well as the size
5138 required for address fields. */
5139 nr_printable_breakpoints
= 0;
5142 /* If we have a filter, only list the breakpoints it accepts. */
5143 if (filter
&& !filter (b
))
5146 /* If we have an "args" string, it is a list of breakpoints to
5147 accept. Skip the others. */
5148 if (args
!= NULL
&& *args
!= '\0')
5150 if (allflag
&& parse_and_eval_long (args
) != b
->number
)
5152 if (!allflag
&& !number_is_in_list (args
, b
->number
))
5156 if (allflag
|| user_breakpoint_p (b
))
5158 int addr_bit
, type_len
;
5160 addr_bit
= breakpoint_address_bits (b
);
5161 if (addr_bit
> print_address_bits
)
5162 print_address_bits
= addr_bit
;
5164 type_len
= strlen (bptype_string (b
->type
));
5165 if (type_len
> print_type_col_width
)
5166 print_type_col_width
= type_len
;
5168 nr_printable_breakpoints
++;
5172 if (opts
.addressprint
)
5174 = make_cleanup_ui_out_table_begin_end (uiout
, 6,
5175 nr_printable_breakpoints
,
5179 = make_cleanup_ui_out_table_begin_end (uiout
, 5,
5180 nr_printable_breakpoints
,
5183 if (nr_printable_breakpoints
> 0)
5184 annotate_breakpoints_headers ();
5185 if (nr_printable_breakpoints
> 0)
5187 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
5188 if (nr_printable_breakpoints
> 0)
5190 ui_out_table_header (uiout
, print_type_col_width
, ui_left
,
5191 "type", "Type"); /* 2 */
5192 if (nr_printable_breakpoints
> 0)
5194 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
5195 if (nr_printable_breakpoints
> 0)
5197 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
5198 if (opts
.addressprint
)
5200 if (nr_printable_breakpoints
> 0)
5202 if (print_address_bits
<= 32)
5203 ui_out_table_header (uiout
, 10, ui_left
,
5204 "addr", "Address"); /* 5 */
5206 ui_out_table_header (uiout
, 18, ui_left
,
5207 "addr", "Address"); /* 5 */
5209 if (nr_printable_breakpoints
> 0)
5211 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
5212 ui_out_table_body (uiout
);
5213 if (nr_printable_breakpoints
> 0)
5214 annotate_breakpoints_table ();
5219 /* If we have a filter, only list the breakpoints it accepts. */
5220 if (filter
&& !filter (b
))
5223 /* If we have an "args" string, it is a list of breakpoints to
5224 accept. Skip the others. */
5226 if (args
!= NULL
&& *args
!= '\0')
5228 if (allflag
) /* maintenance info breakpoint */
5230 if (parse_and_eval_long (args
) != b
->number
)
5233 else /* all others */
5235 if (!number_is_in_list (args
, b
->number
))
5239 /* We only print out user settable breakpoints unless the
5241 if (allflag
|| user_breakpoint_p (b
))
5242 print_one_breakpoint (b
, &last_loc
, allflag
);
5245 do_cleanups (bkpttbl_chain
);
5247 if (nr_printable_breakpoints
== 0)
5249 /* If there's a filter, let the caller decide how to report
5253 if (args
== NULL
|| *args
== '\0')
5254 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
5256 ui_out_message (uiout
, 0,
5257 "No breakpoint or watchpoint matching '%s'.\n",
5263 if (last_loc
&& !server_command
)
5264 set_next_address (last_loc
->gdbarch
, last_loc
->address
);
5267 /* FIXME? Should this be moved up so that it is only called when
5268 there have been breakpoints? */
5269 annotate_breakpoints_table_end ();
5271 return nr_printable_breakpoints
;
5274 /* Display the value of default-collect in a way that is generally
5275 compatible with the breakpoint list. */
5278 default_collect_info (void)
5280 struct ui_out
*uiout
= current_uiout
;
5282 /* If it has no value (which is frequently the case), say nothing; a
5283 message like "No default-collect." gets in user's face when it's
5285 if (!*default_collect
)
5288 /* The following phrase lines up nicely with per-tracepoint collect
5290 ui_out_text (uiout
, "default collect ");
5291 ui_out_field_string (uiout
, "default-collect", default_collect
);
5292 ui_out_text (uiout
, " \n");
5296 breakpoints_info (char *args
, int from_tty
)
5298 breakpoint_1 (args
, 0, NULL
);
5300 default_collect_info ();
5304 watchpoints_info (char *args
, int from_tty
)
5306 int num_printed
= breakpoint_1 (args
, 0, is_watchpoint
);
5307 struct ui_out
*uiout
= current_uiout
;
5309 if (num_printed
== 0)
5311 if (args
== NULL
|| *args
== '\0')
5312 ui_out_message (uiout
, 0, "No watchpoints.\n");
5314 ui_out_message (uiout
, 0, "No watchpoint matching '%s'.\n", args
);
5319 maintenance_info_breakpoints (char *args
, int from_tty
)
5321 breakpoint_1 (args
, 1, NULL
);
5323 default_collect_info ();
5327 breakpoint_has_pc (struct breakpoint
*b
,
5328 struct program_space
*pspace
,
5329 CORE_ADDR pc
, struct obj_section
*section
)
5331 struct bp_location
*bl
= b
->loc
;
5333 for (; bl
; bl
= bl
->next
)
5335 if (bl
->pspace
== pspace
5336 && bl
->address
== pc
5337 && (!overlay_debugging
|| bl
->section
== section
))
5343 /* Print a message describing any user-breakpoints set at PC. This
5344 concerns with logical breakpoints, so we match program spaces, not
5348 describe_other_breakpoints (struct gdbarch
*gdbarch
,
5349 struct program_space
*pspace
, CORE_ADDR pc
,
5350 struct obj_section
*section
, int thread
)
5353 struct breakpoint
*b
;
5356 others
+= (user_breakpoint_p (b
)
5357 && breakpoint_has_pc (b
, pspace
, pc
, section
));
5361 printf_filtered (_("Note: breakpoint "));
5362 else /* if (others == ???) */
5363 printf_filtered (_("Note: breakpoints "));
5365 if (user_breakpoint_p (b
) && breakpoint_has_pc (b
, pspace
, pc
, section
))
5368 printf_filtered ("%d", b
->number
);
5369 if (b
->thread
== -1 && thread
!= -1)
5370 printf_filtered (" (all threads)");
5371 else if (b
->thread
!= -1)
5372 printf_filtered (" (thread %d)", b
->thread
);
5373 printf_filtered ("%s%s ",
5374 ((b
->enable_state
== bp_disabled
5375 || b
->enable_state
== bp_call_disabled
)
5377 : b
->enable_state
== bp_permanent
5381 : ((others
== 1) ? " and" : ""));
5383 printf_filtered (_("also set at pc "));
5384 fputs_filtered (paddress (gdbarch
, pc
), gdb_stdout
);
5385 printf_filtered (".\n");
5390 /* Return true iff it is meaningful to use the address member of
5391 BPT. For some breakpoint types, the address member is irrelevant
5392 and it makes no sense to attempt to compare it to other addresses
5393 (or use it for any other purpose either).
5395 More specifically, each of the following breakpoint types will
5396 always have a zero valued address and we don't want to mark
5397 breakpoints of any of these types to be a duplicate of an actual
5398 breakpoint at address zero:
5406 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
5408 enum bptype type
= bpt
->type
;
5410 return (type
!= bp_watchpoint
&& type
!= bp_catchpoint
);
5413 /* Assuming LOC1 and LOC2's owners are hardware watchpoints, returns
5414 true if LOC1 and LOC2 represent the same watchpoint location. */
5417 watchpoint_locations_match (struct bp_location
*loc1
,
5418 struct bp_location
*loc2
)
5420 struct watchpoint
*w1
= (struct watchpoint
*) loc1
->owner
;
5421 struct watchpoint
*w2
= (struct watchpoint
*) loc2
->owner
;
5423 /* Both of them must exist. */
5424 gdb_assert (w1
!= NULL
);
5425 gdb_assert (w2
!= NULL
);
5427 /* If the target can evaluate the condition expression in hardware,
5428 then we we need to insert both watchpoints even if they are at
5429 the same place. Otherwise the watchpoint will only trigger when
5430 the condition of whichever watchpoint was inserted evaluates to
5431 true, not giving a chance for GDB to check the condition of the
5432 other watchpoint. */
5434 && target_can_accel_watchpoint_condition (loc1
->address
,
5436 loc1
->watchpoint_type
,
5439 && target_can_accel_watchpoint_condition (loc2
->address
,
5441 loc2
->watchpoint_type
,
5445 /* Note that this checks the owner's type, not the location's. In
5446 case the target does not support read watchpoints, but does
5447 support access watchpoints, we'll have bp_read_watchpoint
5448 watchpoints with hw_access locations. Those should be considered
5449 duplicates of hw_read locations. The hw_read locations will
5450 become hw_access locations later. */
5451 return (loc1
->owner
->type
== loc2
->owner
->type
5452 && loc1
->pspace
->aspace
== loc2
->pspace
->aspace
5453 && loc1
->address
== loc2
->address
5454 && loc1
->length
== loc2
->length
);
5457 /* Returns true if {ASPACE1,ADDR1} and {ASPACE2,ADDR2} represent the
5458 same breakpoint location. In most targets, this can only be true
5459 if ASPACE1 matches ASPACE2. On targets that have global
5460 breakpoints, the address space doesn't really matter. */
5463 breakpoint_address_match (struct address_space
*aspace1
, CORE_ADDR addr1
,
5464 struct address_space
*aspace2
, CORE_ADDR addr2
)
5466 return ((gdbarch_has_global_breakpoints (target_gdbarch
)
5467 || aspace1
== aspace2
)
5471 /* Returns true if {ASPACE2,ADDR2} falls within the range determined by
5472 {ASPACE1,ADDR1,LEN1}. In most targets, this can only be true if ASPACE1
5473 matches ASPACE2. On targets that have global breakpoints, the address
5474 space doesn't really matter. */
5477 breakpoint_address_match_range (struct address_space
*aspace1
, CORE_ADDR addr1
,
5478 int len1
, struct address_space
*aspace2
,
5481 return ((gdbarch_has_global_breakpoints (target_gdbarch
)
5482 || aspace1
== aspace2
)
5483 && addr2
>= addr1
&& addr2
< addr1
+ len1
);
5486 /* Returns true if {ASPACE,ADDR} matches the breakpoint BL. BL may be
5487 a ranged breakpoint. In most targets, a match happens only if ASPACE
5488 matches the breakpoint's address space. On targets that have global
5489 breakpoints, the address space doesn't really matter. */
5492 breakpoint_location_address_match (struct bp_location
*bl
,
5493 struct address_space
*aspace
,
5496 return (breakpoint_address_match (bl
->pspace
->aspace
, bl
->address
,
5499 && breakpoint_address_match_range (bl
->pspace
->aspace
,
5500 bl
->address
, bl
->length
,
5504 /* If LOC1 and LOC2's owners are not tracepoints, returns false directly.
5505 Then, if LOC1 and LOC2 represent the same tracepoint location, returns
5506 true, otherwise returns false. */
5509 tracepoint_locations_match (struct bp_location
*loc1
,
5510 struct bp_location
*loc2
)
5512 if (is_tracepoint (loc1
->owner
) && is_tracepoint (loc2
->owner
))
5513 /* Since tracepoint locations are never duplicated with others', tracepoint
5514 locations at the same address of different tracepoints are regarded as
5515 different locations. */
5516 return (loc1
->address
== loc2
->address
&& loc1
->owner
== loc2
->owner
);
5521 /* Assuming LOC1 and LOC2's types' have meaningful target addresses
5522 (breakpoint_address_is_meaningful), returns true if LOC1 and LOC2
5523 represent the same location. */
5526 breakpoint_locations_match (struct bp_location
*loc1
,
5527 struct bp_location
*loc2
)
5529 int hw_point1
, hw_point2
;
5531 /* Both of them must not be in moribund_locations. */
5532 gdb_assert (loc1
->owner
!= NULL
);
5533 gdb_assert (loc2
->owner
!= NULL
);
5535 hw_point1
= is_hardware_watchpoint (loc1
->owner
);
5536 hw_point2
= is_hardware_watchpoint (loc2
->owner
);
5538 if (hw_point1
!= hw_point2
)
5541 return watchpoint_locations_match (loc1
, loc2
);
5542 else if (is_tracepoint (loc1
->owner
) || is_tracepoint (loc2
->owner
))
5543 return tracepoint_locations_match (loc1
, loc2
);
5545 /* We compare bp_location.length in order to cover ranged breakpoints. */
5546 return (breakpoint_address_match (loc1
->pspace
->aspace
, loc1
->address
,
5547 loc2
->pspace
->aspace
, loc2
->address
)
5548 && loc1
->length
== loc2
->length
);
5552 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
5553 int bnum
, int have_bnum
)
5555 /* The longest string possibly returned by hex_string_custom
5556 is 50 chars. These must be at least that big for safety. */
5560 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
5561 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
5563 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
5564 bnum
, astr1
, astr2
);
5566 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
5569 /* Adjust a breakpoint's address to account for architectural
5570 constraints on breakpoint placement. Return the adjusted address.
5571 Note: Very few targets require this kind of adjustment. For most
5572 targets, this function is simply the identity function. */
5575 adjust_breakpoint_address (struct gdbarch
*gdbarch
,
5576 CORE_ADDR bpaddr
, enum bptype bptype
)
5578 if (!gdbarch_adjust_breakpoint_address_p (gdbarch
))
5580 /* Very few targets need any kind of breakpoint adjustment. */
5583 else if (bptype
== bp_watchpoint
5584 || bptype
== bp_hardware_watchpoint
5585 || bptype
== bp_read_watchpoint
5586 || bptype
== bp_access_watchpoint
5587 || bptype
== bp_catchpoint
)
5589 /* Watchpoints and the various bp_catch_* eventpoints should not
5590 have their addresses modified. */
5595 CORE_ADDR adjusted_bpaddr
;
5597 /* Some targets have architectural constraints on the placement
5598 of breakpoint instructions. Obtain the adjusted address. */
5599 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (gdbarch
, bpaddr
);
5601 /* An adjusted breakpoint address can significantly alter
5602 a user's expectations. Print a warning if an adjustment
5604 if (adjusted_bpaddr
!= bpaddr
)
5605 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
5607 return adjusted_bpaddr
;
5612 init_bp_location (struct bp_location
*loc
, const struct bp_location_ops
*ops
,
5613 struct breakpoint
*owner
)
5615 memset (loc
, 0, sizeof (*loc
));
5617 gdb_assert (ops
!= NULL
);
5622 loc
->shlib_disabled
= 0;
5625 switch (owner
->type
)
5631 case bp_longjmp_resume
:
5633 case bp_exception_resume
:
5634 case bp_step_resume
:
5635 case bp_hp_step_resume
:
5636 case bp_watchpoint_scope
:
5638 case bp_std_terminate
:
5639 case bp_shlib_event
:
5640 case bp_thread_event
:
5641 case bp_overlay_event
:
5643 case bp_longjmp_master
:
5644 case bp_std_terminate_master
:
5645 case bp_exception_master
:
5646 case bp_gnu_ifunc_resolver
:
5647 case bp_gnu_ifunc_resolver_return
:
5648 loc
->loc_type
= bp_loc_software_breakpoint
;
5650 case bp_hardware_breakpoint
:
5651 loc
->loc_type
= bp_loc_hardware_breakpoint
;
5653 case bp_hardware_watchpoint
:
5654 case bp_read_watchpoint
:
5655 case bp_access_watchpoint
:
5656 loc
->loc_type
= bp_loc_hardware_watchpoint
;
5661 case bp_fast_tracepoint
:
5662 case bp_static_tracepoint
:
5663 loc
->loc_type
= bp_loc_other
;
5666 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
5672 /* Allocate a struct bp_location. */
5674 static struct bp_location
*
5675 allocate_bp_location (struct breakpoint
*bpt
)
5677 return bpt
->ops
->allocate_location (bpt
);
5681 free_bp_location (struct bp_location
*loc
)
5683 loc
->ops
->dtor (loc
);
5687 /* Increment reference count. */
5690 incref_bp_location (struct bp_location
*bl
)
5695 /* Decrement reference count. If the reference count reaches 0,
5696 destroy the bp_location. Sets *BLP to NULL. */
5699 decref_bp_location (struct bp_location
**blp
)
5701 gdb_assert ((*blp
)->refc
> 0);
5703 if (--(*blp
)->refc
== 0)
5704 free_bp_location (*blp
);
5708 /* Add breakpoint B at the end of the global breakpoint chain. */
5711 add_to_breakpoint_chain (struct breakpoint
*b
)
5713 struct breakpoint
*b1
;
5715 /* Add this breakpoint to the end of the chain so that a list of
5716 breakpoints will come out in order of increasing numbers. */
5718 b1
= breakpoint_chain
;
5720 breakpoint_chain
= b
;
5729 /* Initializes breakpoint B with type BPTYPE and no locations yet. */
5732 init_raw_breakpoint_without_location (struct breakpoint
*b
,
5733 struct gdbarch
*gdbarch
,
5735 const struct breakpoint_ops
*ops
)
5737 memset (b
, 0, sizeof (*b
));
5739 gdb_assert (ops
!= NULL
);
5743 b
->gdbarch
= gdbarch
;
5744 b
->language
= current_language
->la_language
;
5745 b
->input_radix
= input_radix
;
5747 b
->enable_state
= bp_enabled
;
5750 b
->ignore_count
= 0;
5752 b
->frame_id
= null_frame_id
;
5753 b
->condition_not_parsed
= 0;
5754 b
->py_bp_object
= NULL
;
5755 b
->related_breakpoint
= b
;
5758 /* Helper to set_raw_breakpoint below. Creates a breakpoint
5759 that has type BPTYPE and has no locations as yet. */
5761 static struct breakpoint
*
5762 set_raw_breakpoint_without_location (struct gdbarch
*gdbarch
,
5764 const struct breakpoint_ops
*ops
)
5766 struct breakpoint
*b
= XNEW (struct breakpoint
);
5768 init_raw_breakpoint_without_location (b
, gdbarch
, bptype
, ops
);
5769 add_to_breakpoint_chain (b
);
5773 /* Initialize loc->function_name. EXPLICIT_LOC says no indirect function
5774 resolutions should be made as the user specified the location explicitly
5778 set_breakpoint_location_function (struct bp_location
*loc
, int explicit_loc
)
5780 gdb_assert (loc
->owner
!= NULL
);
5782 if (loc
->owner
->type
== bp_breakpoint
5783 || loc
->owner
->type
== bp_hardware_breakpoint
5784 || is_tracepoint (loc
->owner
))
5788 find_pc_partial_function_gnu_ifunc (loc
->address
, &loc
->function_name
,
5789 NULL
, NULL
, &is_gnu_ifunc
);
5791 if (is_gnu_ifunc
&& !explicit_loc
)
5793 struct breakpoint
*b
= loc
->owner
;
5795 gdb_assert (loc
->pspace
== current_program_space
);
5796 if (gnu_ifunc_resolve_name (loc
->function_name
,
5797 &loc
->requested_address
))
5799 /* Recalculate ADDRESS based on new REQUESTED_ADDRESS. */
5800 loc
->address
= adjust_breakpoint_address (loc
->gdbarch
,
5801 loc
->requested_address
,
5804 else if (b
->type
== bp_breakpoint
&& b
->loc
== loc
5805 && loc
->next
== NULL
&& b
->related_breakpoint
== b
)
5807 /* Create only the whole new breakpoint of this type but do not
5808 mess more complicated breakpoints with multiple locations. */
5809 b
->type
= bp_gnu_ifunc_resolver
;
5813 if (loc
->function_name
)
5814 loc
->function_name
= xstrdup (loc
->function_name
);
5818 /* Attempt to determine architecture of location identified by SAL. */
5820 get_sal_arch (struct symtab_and_line sal
)
5823 return get_objfile_arch (sal
.section
->objfile
);
5825 return get_objfile_arch (sal
.symtab
->objfile
);
5830 /* Low level routine for partially initializing a breakpoint of type
5831 BPTYPE. The newly created breakpoint's address, section, source
5832 file name, and line number are provided by SAL.
5834 It is expected that the caller will complete the initialization of
5835 the newly created breakpoint struct as well as output any status
5836 information regarding the creation of a new breakpoint. */
5839 init_raw_breakpoint (struct breakpoint
*b
, struct gdbarch
*gdbarch
,
5840 struct symtab_and_line sal
, enum bptype bptype
,
5841 const struct breakpoint_ops
*ops
)
5843 init_raw_breakpoint_without_location (b
, gdbarch
, bptype
, ops
);
5845 add_location_to_breakpoint (b
, &sal
);
5847 if (bptype
!= bp_catchpoint
)
5848 gdb_assert (sal
.pspace
!= NULL
);
5850 /* Store the program space that was used to set the breakpoint,
5851 except for ordinary breakpoints, which are independent of the
5853 if (bptype
!= bp_breakpoint
&& bptype
!= bp_hardware_breakpoint
)
5854 b
->pspace
= sal
.pspace
;
5856 breakpoints_changed ();
5859 /* set_raw_breakpoint is a low level routine for allocating and
5860 partially initializing a breakpoint of type BPTYPE. The newly
5861 created breakpoint's address, section, source file name, and line
5862 number are provided by SAL. The newly created and partially
5863 initialized breakpoint is added to the breakpoint chain and
5864 is also returned as the value of this function.
5866 It is expected that the caller will complete the initialization of
5867 the newly created breakpoint struct as well as output any status
5868 information regarding the creation of a new breakpoint. In
5869 particular, set_raw_breakpoint does NOT set the breakpoint
5870 number! Care should be taken to not allow an error to occur
5871 prior to completing the initialization of the breakpoint. If this
5872 should happen, a bogus breakpoint will be left on the chain. */
5875 set_raw_breakpoint (struct gdbarch
*gdbarch
,
5876 struct symtab_and_line sal
, enum bptype bptype
,
5877 const struct breakpoint_ops
*ops
)
5879 struct breakpoint
*b
= XNEW (struct breakpoint
);
5881 init_raw_breakpoint (b
, gdbarch
, sal
, bptype
, ops
);
5882 add_to_breakpoint_chain (b
);
5887 /* Note that the breakpoint object B describes a permanent breakpoint
5888 instruction, hard-wired into the inferior's code. */
5890 make_breakpoint_permanent (struct breakpoint
*b
)
5892 struct bp_location
*bl
;
5894 b
->enable_state
= bp_permanent
;
5896 /* By definition, permanent breakpoints are already present in the
5897 code. Mark all locations as inserted. For now,
5898 make_breakpoint_permanent is called in just one place, so it's
5899 hard to say if it's reasonable to have permanent breakpoint with
5900 multiple locations or not, but it's easy to implement. */
5901 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
5905 /* Call this routine when stepping and nexting to enable a breakpoint
5906 if we do a longjmp() or 'throw' in TP. FRAME is the frame which
5907 initiated the operation. */
5910 set_longjmp_breakpoint (struct thread_info
*tp
, struct frame_id frame
)
5912 struct breakpoint
*b
, *b_tmp
;
5913 int thread
= tp
->num
;
5915 /* To avoid having to rescan all objfile symbols at every step,
5916 we maintain a list of continually-inserted but always disabled
5917 longjmp "master" breakpoints. Here, we simply create momentary
5918 clones of those and enable them for the requested thread. */
5919 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
5920 if (b
->pspace
== current_program_space
5921 && (b
->type
== bp_longjmp_master
5922 || b
->type
== bp_exception_master
))
5924 enum bptype type
= b
->type
== bp_longjmp_master
? bp_longjmp
: bp_exception
;
5925 struct breakpoint
*clone
;
5927 clone
= momentary_breakpoint_from_master (b
, type
,
5928 &momentary_breakpoint_ops
);
5929 clone
->thread
= thread
;
5932 tp
->initiating_frame
= frame
;
5935 /* Delete all longjmp breakpoints from THREAD. */
5937 delete_longjmp_breakpoint (int thread
)
5939 struct breakpoint
*b
, *b_tmp
;
5941 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
5942 if (b
->type
== bp_longjmp
|| b
->type
== bp_exception
)
5944 if (b
->thread
== thread
)
5945 delete_breakpoint (b
);
5950 enable_overlay_breakpoints (void)
5952 struct breakpoint
*b
;
5955 if (b
->type
== bp_overlay_event
)
5957 b
->enable_state
= bp_enabled
;
5958 update_global_location_list (1);
5959 overlay_events_enabled
= 1;
5964 disable_overlay_breakpoints (void)
5966 struct breakpoint
*b
;
5969 if (b
->type
== bp_overlay_event
)
5971 b
->enable_state
= bp_disabled
;
5972 update_global_location_list (0);
5973 overlay_events_enabled
= 0;
5977 /* Set an active std::terminate breakpoint for each std::terminate
5978 master breakpoint. */
5980 set_std_terminate_breakpoint (void)
5982 struct breakpoint
*b
, *b_tmp
;
5984 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
5985 if (b
->pspace
== current_program_space
5986 && b
->type
== bp_std_terminate_master
)
5988 momentary_breakpoint_from_master (b
, bp_std_terminate
,
5989 &momentary_breakpoint_ops
);
5993 /* Delete all the std::terminate breakpoints. */
5995 delete_std_terminate_breakpoint (void)
5997 struct breakpoint
*b
, *b_tmp
;
5999 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
6000 if (b
->type
== bp_std_terminate
)
6001 delete_breakpoint (b
);
6005 create_thread_event_breakpoint (struct gdbarch
*gdbarch
, CORE_ADDR address
)
6007 struct breakpoint
*b
;
6009 b
= create_internal_breakpoint (gdbarch
, address
, bp_thread_event
,
6010 &internal_breakpoint_ops
);
6012 b
->enable_state
= bp_enabled
;
6013 /* addr_string has to be used or breakpoint_re_set will delete me. */
6015 = xstrprintf ("*%s", paddress (b
->loc
->gdbarch
, b
->loc
->address
));
6017 update_global_location_list_nothrow (1);
6023 remove_thread_event_breakpoints (void)
6025 struct breakpoint
*b
, *b_tmp
;
6027 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
6028 if (b
->type
== bp_thread_event
6029 && b
->loc
->pspace
== current_program_space
)
6030 delete_breakpoint (b
);
6033 struct lang_and_radix
6039 /* Create a breakpoint for JIT code registration and unregistration. */
6042 create_jit_event_breakpoint (struct gdbarch
*gdbarch
, CORE_ADDR address
)
6044 struct breakpoint
*b
;
6046 b
= create_internal_breakpoint (gdbarch
, address
, bp_jit_event
,
6047 &internal_breakpoint_ops
);
6048 update_global_location_list_nothrow (1);
6052 /* Remove JIT code registration and unregistration breakpoint(s). */
6055 remove_jit_event_breakpoints (void)
6057 struct breakpoint
*b
, *b_tmp
;
6059 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
6060 if (b
->type
== bp_jit_event
6061 && b
->loc
->pspace
== current_program_space
)
6062 delete_breakpoint (b
);
6066 remove_solib_event_breakpoints (void)
6068 struct breakpoint
*b
, *b_tmp
;
6070 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
6071 if (b
->type
== bp_shlib_event
6072 && b
->loc
->pspace
== current_program_space
)
6073 delete_breakpoint (b
);
6077 create_solib_event_breakpoint (struct gdbarch
*gdbarch
, CORE_ADDR address
)
6079 struct breakpoint
*b
;
6081 b
= create_internal_breakpoint (gdbarch
, address
, bp_shlib_event
,
6082 &internal_breakpoint_ops
);
6083 update_global_location_list_nothrow (1);
6087 /* Disable any breakpoints that are on code in shared libraries. Only
6088 apply to enabled breakpoints, disabled ones can just stay disabled. */
6091 disable_breakpoints_in_shlibs (void)
6093 struct bp_location
*loc
, **locp_tmp
;
6095 ALL_BP_LOCATIONS (loc
, locp_tmp
)
6097 /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */
6098 struct breakpoint
*b
= loc
->owner
;
6100 /* We apply the check to all breakpoints, including disabled for
6101 those with loc->duplicate set. This is so that when breakpoint
6102 becomes enabled, or the duplicate is removed, gdb will try to
6103 insert all breakpoints. If we don't set shlib_disabled here,
6104 we'll try to insert those breakpoints and fail. */
6105 if (((b
->type
== bp_breakpoint
)
6106 || (b
->type
== bp_jit_event
)
6107 || (b
->type
== bp_hardware_breakpoint
)
6108 || (is_tracepoint (b
)))
6109 && loc
->pspace
== current_program_space
6110 && !loc
->shlib_disabled
6112 && PC_SOLIB (loc
->address
)
6114 && solib_name_from_address (loc
->pspace
, loc
->address
)
6118 loc
->shlib_disabled
= 1;
6123 /* Disable any breakpoints and tracepoints that are in an unloaded shared
6124 library. Only apply to enabled breakpoints, disabled ones can just stay
6128 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
6130 struct bp_location
*loc
, **locp_tmp
;
6131 int disabled_shlib_breaks
= 0;
6133 /* SunOS a.out shared libraries are always mapped, so do not
6134 disable breakpoints; they will only be reported as unloaded
6135 through clear_solib when GDB discards its shared library
6136 list. See clear_solib for more information. */
6137 if (exec_bfd
!= NULL
6138 && bfd_get_flavour (exec_bfd
) == bfd_target_aout_flavour
)
6141 ALL_BP_LOCATIONS (loc
, locp_tmp
)
6143 /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */
6144 struct breakpoint
*b
= loc
->owner
;
6146 if (solib
->pspace
== loc
->pspace
6147 && !loc
->shlib_disabled
6148 && (((b
->type
== bp_breakpoint
6149 || b
->type
== bp_jit_event
6150 || b
->type
== bp_hardware_breakpoint
)
6151 && (loc
->loc_type
== bp_loc_hardware_breakpoint
6152 || loc
->loc_type
== bp_loc_software_breakpoint
))
6153 || is_tracepoint (b
))
6154 && solib_contains_address_p (solib
, loc
->address
))
6156 loc
->shlib_disabled
= 1;
6157 /* At this point, we cannot rely on remove_breakpoint
6158 succeeding so we must mark the breakpoint as not inserted
6159 to prevent future errors occurring in remove_breakpoints. */
6162 /* This may cause duplicate notifications for the same breakpoint. */
6163 observer_notify_breakpoint_modified (b
);
6165 if (!disabled_shlib_breaks
)
6167 target_terminal_ours_for_output ();
6168 warning (_("Temporarily disabling breakpoints "
6169 "for unloaded shared library \"%s\""),
6172 disabled_shlib_breaks
= 1;
6177 /* FORK & VFORK catchpoints. */
6179 /* An instance of this type is used to represent a fork or vfork
6180 catchpoint. It includes a "struct breakpoint" as a kind of base
6181 class; users downcast to "struct breakpoint *" when needed. A
6182 breakpoint is really of this type iff its ops pointer points to
6183 CATCH_FORK_BREAKPOINT_OPS. */
6185 struct fork_catchpoint
6187 /* The base class. */
6188 struct breakpoint base
;
6190 /* Process id of a child process whose forking triggered this
6191 catchpoint. This field is only valid immediately after this
6192 catchpoint has triggered. */
6193 ptid_t forked_inferior_pid
;
6196 /* Implement the "insert" breakpoint_ops method for fork
6200 insert_catch_fork (struct bp_location
*bl
)
6202 return target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
6205 /* Implement the "remove" breakpoint_ops method for fork
6209 remove_catch_fork (struct bp_location
*bl
)
6211 return target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
6214 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
6218 breakpoint_hit_catch_fork (const struct bp_location
*bl
,
6219 struct address_space
*aspace
, CORE_ADDR bp_addr
)
6221 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) bl
->owner
;
6223 return inferior_has_forked (inferior_ptid
, &c
->forked_inferior_pid
);
6226 /* Implement the "print_it" breakpoint_ops method for fork
6229 static enum print_stop_action
6230 print_it_catch_fork (bpstat bs
)
6232 struct ui_out
*uiout
= current_uiout
;
6233 struct breakpoint
*b
= bs
->breakpoint_at
;
6234 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) bs
->breakpoint_at
;
6236 annotate_catchpoint (b
->number
);
6237 if (b
->disposition
== disp_del
)
6238 ui_out_text (uiout
, "\nTemporary catchpoint ");
6240 ui_out_text (uiout
, "\nCatchpoint ");
6241 if (ui_out_is_mi_like_p (uiout
))
6243 ui_out_field_string (uiout
, "reason",
6244 async_reason_lookup (EXEC_ASYNC_FORK
));
6245 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6247 ui_out_field_int (uiout
, "bkptno", b
->number
);
6248 ui_out_text (uiout
, " (forked process ");
6249 ui_out_field_int (uiout
, "newpid", ptid_get_pid (c
->forked_inferior_pid
));
6250 ui_out_text (uiout
, "), ");
6251 return PRINT_SRC_AND_LOC
;
6254 /* Implement the "print_one" breakpoint_ops method for fork
6258 print_one_catch_fork (struct breakpoint
*b
, struct bp_location
**last_loc
)
6260 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) b
;
6261 struct value_print_options opts
;
6262 struct ui_out
*uiout
= current_uiout
;
6264 get_user_print_options (&opts
);
6266 /* Field 4, the address, is omitted (which makes the columns not
6267 line up too nicely with the headers, but the effect is relatively
6269 if (opts
.addressprint
)
6270 ui_out_field_skip (uiout
, "addr");
6272 ui_out_text (uiout
, "fork");
6273 if (!ptid_equal (c
->forked_inferior_pid
, null_ptid
))
6275 ui_out_text (uiout
, ", process ");
6276 ui_out_field_int (uiout
, "what",
6277 ptid_get_pid (c
->forked_inferior_pid
));
6278 ui_out_spaces (uiout
, 1);
6282 /* Implement the "print_mention" breakpoint_ops method for fork
6286 print_mention_catch_fork (struct breakpoint
*b
)
6288 printf_filtered (_("Catchpoint %d (fork)"), b
->number
);
6291 /* Implement the "print_recreate" breakpoint_ops method for fork
6295 print_recreate_catch_fork (struct breakpoint
*b
, struct ui_file
*fp
)
6297 fprintf_unfiltered (fp
, "catch fork");
6298 print_recreate_thread (b
, fp
);
6301 /* The breakpoint_ops structure to be used in fork catchpoints. */
6303 static struct breakpoint_ops catch_fork_breakpoint_ops
;
6305 /* Implement the "insert" breakpoint_ops method for vfork
6309 insert_catch_vfork (struct bp_location
*bl
)
6311 return target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
6314 /* Implement the "remove" breakpoint_ops method for vfork
6318 remove_catch_vfork (struct bp_location
*bl
)
6320 return target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
6323 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
6327 breakpoint_hit_catch_vfork (const struct bp_location
*bl
,
6328 struct address_space
*aspace
, CORE_ADDR bp_addr
)
6330 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) bl
->owner
;
6332 return inferior_has_vforked (inferior_ptid
, &c
->forked_inferior_pid
);
6335 /* Implement the "print_it" breakpoint_ops method for vfork
6338 static enum print_stop_action
6339 print_it_catch_vfork (bpstat bs
)
6341 struct ui_out
*uiout
= current_uiout
;
6342 struct breakpoint
*b
= bs
->breakpoint_at
;
6343 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) b
;
6345 annotate_catchpoint (b
->number
);
6346 if (b
->disposition
== disp_del
)
6347 ui_out_text (uiout
, "\nTemporary catchpoint ");
6349 ui_out_text (uiout
, "\nCatchpoint ");
6350 if (ui_out_is_mi_like_p (uiout
))
6352 ui_out_field_string (uiout
, "reason",
6353 async_reason_lookup (EXEC_ASYNC_VFORK
));
6354 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6356 ui_out_field_int (uiout
, "bkptno", b
->number
);
6357 ui_out_text (uiout
, " (vforked process ");
6358 ui_out_field_int (uiout
, "newpid", ptid_get_pid (c
->forked_inferior_pid
));
6359 ui_out_text (uiout
, "), ");
6360 return PRINT_SRC_AND_LOC
;
6363 /* Implement the "print_one" breakpoint_ops method for vfork
6367 print_one_catch_vfork (struct breakpoint
*b
, struct bp_location
**last_loc
)
6369 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) b
;
6370 struct value_print_options opts
;
6371 struct ui_out
*uiout
= current_uiout
;
6373 get_user_print_options (&opts
);
6374 /* Field 4, the address, is omitted (which makes the columns not
6375 line up too nicely with the headers, but the effect is relatively
6377 if (opts
.addressprint
)
6378 ui_out_field_skip (uiout
, "addr");
6380 ui_out_text (uiout
, "vfork");
6381 if (!ptid_equal (c
->forked_inferior_pid
, null_ptid
))
6383 ui_out_text (uiout
, ", process ");
6384 ui_out_field_int (uiout
, "what",
6385 ptid_get_pid (c
->forked_inferior_pid
));
6386 ui_out_spaces (uiout
, 1);
6390 /* Implement the "print_mention" breakpoint_ops method for vfork
6394 print_mention_catch_vfork (struct breakpoint
*b
)
6396 printf_filtered (_("Catchpoint %d (vfork)"), b
->number
);
6399 /* Implement the "print_recreate" breakpoint_ops method for vfork
6403 print_recreate_catch_vfork (struct breakpoint
*b
, struct ui_file
*fp
)
6405 fprintf_unfiltered (fp
, "catch vfork");
6406 print_recreate_thread (b
, fp
);
6409 /* The breakpoint_ops structure to be used in vfork catchpoints. */
6411 static struct breakpoint_ops catch_vfork_breakpoint_ops
;
6413 /* An instance of this type is used to represent a syscall catchpoint.
6414 It includes a "struct breakpoint" as a kind of base class; users
6415 downcast to "struct breakpoint *" when needed. A breakpoint is
6416 really of this type iff its ops pointer points to
6417 CATCH_SYSCALL_BREAKPOINT_OPS. */
6419 struct syscall_catchpoint
6421 /* The base class. */
6422 struct breakpoint base
;
6424 /* Syscall numbers used for the 'catch syscall' feature. If no
6425 syscall has been specified for filtering, its value is NULL.
6426 Otherwise, it holds a list of all syscalls to be caught. The
6427 list elements are allocated with xmalloc. */
6428 VEC(int) *syscalls_to_be_caught
;
6431 /* Implement the "dtor" breakpoint_ops method for syscall
6435 dtor_catch_syscall (struct breakpoint
*b
)
6437 struct syscall_catchpoint
*c
= (struct syscall_catchpoint
*) b
;
6439 VEC_free (int, c
->syscalls_to_be_caught
);
6441 base_breakpoint_ops
.dtor (b
);
6444 /* Implement the "insert" breakpoint_ops method for syscall
6448 insert_catch_syscall (struct bp_location
*bl
)
6450 struct syscall_catchpoint
*c
= (struct syscall_catchpoint
*) bl
->owner
;
6451 struct inferior
*inf
= current_inferior ();
6453 ++inf
->total_syscalls_count
;
6454 if (!c
->syscalls_to_be_caught
)
6455 ++inf
->any_syscall_count
;
6461 VEC_iterate (int, c
->syscalls_to_be_caught
, i
, iter
);
6466 if (iter
>= VEC_length (int, inf
->syscalls_counts
))
6468 int old_size
= VEC_length (int, inf
->syscalls_counts
);
6469 uintptr_t vec_addr_offset
6470 = old_size
* ((uintptr_t) sizeof (int));
6472 VEC_safe_grow (int, inf
->syscalls_counts
, iter
+ 1);
6473 vec_addr
= (uintptr_t) VEC_address (int, inf
->syscalls_counts
) +
6475 memset ((void *) vec_addr
, 0,
6476 (iter
+ 1 - old_size
) * sizeof (int));
6478 elem
= VEC_index (int, inf
->syscalls_counts
, iter
);
6479 VEC_replace (int, inf
->syscalls_counts
, iter
, ++elem
);
6483 return target_set_syscall_catchpoint (PIDGET (inferior_ptid
),
6484 inf
->total_syscalls_count
!= 0,
6485 inf
->any_syscall_count
,
6486 VEC_length (int, inf
->syscalls_counts
),
6487 VEC_address (int, inf
->syscalls_counts
));
6490 /* Implement the "remove" breakpoint_ops method for syscall
6494 remove_catch_syscall (struct bp_location
*bl
)
6496 struct syscall_catchpoint
*c
= (struct syscall_catchpoint
*) bl
->owner
;
6497 struct inferior
*inf
= current_inferior ();
6499 --inf
->total_syscalls_count
;
6500 if (!c
->syscalls_to_be_caught
)
6501 --inf
->any_syscall_count
;
6507 VEC_iterate (int, c
->syscalls_to_be_caught
, i
, iter
);
6511 if (iter
>= VEC_length (int, inf
->syscalls_counts
))
6512 /* Shouldn't happen. */
6514 elem
= VEC_index (int, inf
->syscalls_counts
, iter
);
6515 VEC_replace (int, inf
->syscalls_counts
, iter
, --elem
);
6519 return target_set_syscall_catchpoint (PIDGET (inferior_ptid
),
6520 inf
->total_syscalls_count
!= 0,
6521 inf
->any_syscall_count
,
6522 VEC_length (int, inf
->syscalls_counts
),
6524 inf
->syscalls_counts
));
6527 /* Implement the "breakpoint_hit" breakpoint_ops method for syscall
6531 breakpoint_hit_catch_syscall (const struct bp_location
*bl
,
6532 struct address_space
*aspace
, CORE_ADDR bp_addr
)
6534 /* We must check if we are catching specific syscalls in this
6535 breakpoint. If we are, then we must guarantee that the called
6536 syscall is the same syscall we are catching. */
6537 int syscall_number
= 0;
6538 const struct syscall_catchpoint
*c
6539 = (const struct syscall_catchpoint
*) bl
->owner
;
6541 if (!inferior_has_called_syscall (inferior_ptid
, &syscall_number
))
6544 /* Now, checking if the syscall is the same. */
6545 if (c
->syscalls_to_be_caught
)
6550 VEC_iterate (int, c
->syscalls_to_be_caught
, i
, iter
);
6552 if (syscall_number
== iter
)
6562 /* Implement the "print_it" breakpoint_ops method for syscall
6565 static enum print_stop_action
6566 print_it_catch_syscall (bpstat bs
)
6568 struct ui_out
*uiout
= current_uiout
;
6569 struct breakpoint
*b
= bs
->breakpoint_at
;
6570 /* These are needed because we want to know in which state a
6571 syscall is. It can be in the TARGET_WAITKIND_SYSCALL_ENTRY
6572 or TARGET_WAITKIND_SYSCALL_RETURN, and depending on it we
6573 must print "called syscall" or "returned from syscall". */
6575 struct target_waitstatus last
;
6579 get_last_target_status (&ptid
, &last
);
6581 get_syscall_by_number (last
.value
.syscall_number
, &s
);
6583 annotate_catchpoint (b
->number
);
6585 if (b
->disposition
== disp_del
)
6586 ui_out_text (uiout
, "\nTemporary catchpoint ");
6588 ui_out_text (uiout
, "\nCatchpoint ");
6589 if (ui_out_is_mi_like_p (uiout
))
6591 ui_out_field_string (uiout
, "reason",
6592 async_reason_lookup (last
.kind
== TARGET_WAITKIND_SYSCALL_ENTRY
6593 ? EXEC_ASYNC_SYSCALL_ENTRY
6594 : EXEC_ASYNC_SYSCALL_RETURN
));
6595 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6597 ui_out_field_int (uiout
, "bkptno", b
->number
);
6599 if (last
.kind
== TARGET_WAITKIND_SYSCALL_ENTRY
)
6600 ui_out_text (uiout
, " (call to syscall ");
6602 ui_out_text (uiout
, " (returned from syscall ");
6604 if (s
.name
== NULL
|| ui_out_is_mi_like_p (uiout
))
6605 ui_out_field_int (uiout
, "syscall-number", last
.value
.syscall_number
);
6607 ui_out_field_string (uiout
, "syscall-name", s
.name
);
6609 ui_out_text (uiout
, "), ");
6611 return PRINT_SRC_AND_LOC
;
6614 /* Implement the "print_one" breakpoint_ops method for syscall
6618 print_one_catch_syscall (struct breakpoint
*b
,
6619 struct bp_location
**last_loc
)
6621 struct syscall_catchpoint
*c
= (struct syscall_catchpoint
*) b
;
6622 struct value_print_options opts
;
6623 struct ui_out
*uiout
= current_uiout
;
6625 get_user_print_options (&opts
);
6626 /* Field 4, the address, is omitted (which makes the columns not
6627 line up too nicely with the headers, but the effect is relatively
6629 if (opts
.addressprint
)
6630 ui_out_field_skip (uiout
, "addr");
6633 if (c
->syscalls_to_be_caught
6634 && VEC_length (int, c
->syscalls_to_be_caught
) > 1)
6635 ui_out_text (uiout
, "syscalls \"");
6637 ui_out_text (uiout
, "syscall \"");
6639 if (c
->syscalls_to_be_caught
)
6642 char *text
= xstrprintf ("%s", "");
6645 VEC_iterate (int, c
->syscalls_to_be_caught
, i
, iter
);
6650 get_syscall_by_number (iter
, &s
);
6653 text
= xstrprintf ("%s%s, ", text
, s
.name
);
6655 text
= xstrprintf ("%s%d, ", text
, iter
);
6657 /* We have to xfree the last 'text' (now stored at 'x')
6658 because xstrprintf dynamically allocates new space for it
6662 /* Remove the last comma. */
6663 text
[strlen (text
) - 2] = '\0';
6664 ui_out_field_string (uiout
, "what", text
);
6667 ui_out_field_string (uiout
, "what", "<any syscall>");
6668 ui_out_text (uiout
, "\" ");
6671 /* Implement the "print_mention" breakpoint_ops method for syscall
6675 print_mention_catch_syscall (struct breakpoint
*b
)
6677 struct syscall_catchpoint
*c
= (struct syscall_catchpoint
*) b
;
6679 if (c
->syscalls_to_be_caught
)
6683 if (VEC_length (int, c
->syscalls_to_be_caught
) > 1)
6684 printf_filtered (_("Catchpoint %d (syscalls"), b
->number
);
6686 printf_filtered (_("Catchpoint %d (syscall"), b
->number
);
6689 VEC_iterate (int, c
->syscalls_to_be_caught
, i
, iter
);
6693 get_syscall_by_number (iter
, &s
);
6696 printf_filtered (" '%s' [%d]", s
.name
, s
.number
);
6698 printf_filtered (" %d", s
.number
);
6700 printf_filtered (")");
6703 printf_filtered (_("Catchpoint %d (any syscall)"),
6707 /* Implement the "print_recreate" breakpoint_ops method for syscall
6711 print_recreate_catch_syscall (struct breakpoint
*b
, struct ui_file
*fp
)
6713 struct syscall_catchpoint
*c
= (struct syscall_catchpoint
*) b
;
6715 fprintf_unfiltered (fp
, "catch syscall");
6717 if (c
->syscalls_to_be_caught
)
6722 VEC_iterate (int, c
->syscalls_to_be_caught
, i
, iter
);
6727 get_syscall_by_number (iter
, &s
);
6729 fprintf_unfiltered (fp
, " %s", s
.name
);
6731 fprintf_unfiltered (fp
, " %d", s
.number
);
6734 print_recreate_thread (b
, fp
);
6737 /* The breakpoint_ops structure to be used in syscall catchpoints. */
6739 static struct breakpoint_ops catch_syscall_breakpoint_ops
;
6741 /* Returns non-zero if 'b' is a syscall catchpoint. */
6744 syscall_catchpoint_p (struct breakpoint
*b
)
6746 return (b
->ops
== &catch_syscall_breakpoint_ops
);
6749 /* Initialize a new breakpoint of the bp_catchpoint kind. If TEMPFLAG
6750 is non-zero, then make the breakpoint temporary. If COND_STRING is
6751 not NULL, then store it in the breakpoint. OPS, if not NULL, is
6752 the breakpoint_ops structure associated to the catchpoint. */
6755 init_catchpoint (struct breakpoint
*b
,
6756 struct gdbarch
*gdbarch
, int tempflag
,
6758 const struct breakpoint_ops
*ops
)
6760 struct symtab_and_line sal
;
6763 sal
.pspace
= current_program_space
;
6765 init_raw_breakpoint (b
, gdbarch
, sal
, bp_catchpoint
, ops
);
6767 b
->cond_string
= (cond_string
== NULL
) ? NULL
: xstrdup (cond_string
);
6768 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6772 install_breakpoint (int internal
, struct breakpoint
*b
, int update_gll
)
6774 add_to_breakpoint_chain (b
);
6775 set_breakpoint_number (internal
, b
);
6778 observer_notify_breakpoint_created (b
);
6781 update_global_location_list (1);
6785 create_fork_vfork_event_catchpoint (struct gdbarch
*gdbarch
,
6786 int tempflag
, char *cond_string
,
6787 const struct breakpoint_ops
*ops
)
6789 struct fork_catchpoint
*c
= XNEW (struct fork_catchpoint
);
6791 init_catchpoint (&c
->base
, gdbarch
, tempflag
, cond_string
, ops
);
6793 c
->forked_inferior_pid
= null_ptid
;
6795 install_breakpoint (0, &c
->base
, 1);
6798 /* Exec catchpoints. */
6800 /* An instance of this type is used to represent an exec catchpoint.
6801 It includes a "struct breakpoint" as a kind of base class; users
6802 downcast to "struct breakpoint *" when needed. A breakpoint is
6803 really of this type iff its ops pointer points to
6804 CATCH_EXEC_BREAKPOINT_OPS. */
6806 struct exec_catchpoint
6808 /* The base class. */
6809 struct breakpoint base
;
6811 /* Filename of a program whose exec triggered this catchpoint.
6812 This field is only valid immediately after this catchpoint has
6814 char *exec_pathname
;
6817 /* Implement the "dtor" breakpoint_ops method for exec
6821 dtor_catch_exec (struct breakpoint
*b
)
6823 struct exec_catchpoint
*c
= (struct exec_catchpoint
*) b
;
6825 xfree (c
->exec_pathname
);
6827 base_breakpoint_ops
.dtor (b
);
6831 insert_catch_exec (struct bp_location
*bl
)
6833 return target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
6837 remove_catch_exec (struct bp_location
*bl
)
6839 return target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
6843 breakpoint_hit_catch_exec (const struct bp_location
*bl
,
6844 struct address_space
*aspace
, CORE_ADDR bp_addr
)
6846 struct exec_catchpoint
*c
= (struct exec_catchpoint
*) bl
->owner
;
6848 return inferior_has_execd (inferior_ptid
, &c
->exec_pathname
);
6851 static enum print_stop_action
6852 print_it_catch_exec (bpstat bs
)
6854 struct ui_out
*uiout
= current_uiout
;
6855 struct breakpoint
*b
= bs
->breakpoint_at
;
6856 struct exec_catchpoint
*c
= (struct exec_catchpoint
*) b
;
6858 annotate_catchpoint (b
->number
);
6859 if (b
->disposition
== disp_del
)
6860 ui_out_text (uiout
, "\nTemporary catchpoint ");
6862 ui_out_text (uiout
, "\nCatchpoint ");
6863 if (ui_out_is_mi_like_p (uiout
))
6865 ui_out_field_string (uiout
, "reason",
6866 async_reason_lookup (EXEC_ASYNC_EXEC
));
6867 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6869 ui_out_field_int (uiout
, "bkptno", b
->number
);
6870 ui_out_text (uiout
, " (exec'd ");
6871 ui_out_field_string (uiout
, "new-exec", c
->exec_pathname
);
6872 ui_out_text (uiout
, "), ");
6874 return PRINT_SRC_AND_LOC
;
6878 print_one_catch_exec (struct breakpoint
*b
, struct bp_location
**last_loc
)
6880 struct exec_catchpoint
*c
= (struct exec_catchpoint
*) b
;
6881 struct value_print_options opts
;
6882 struct ui_out
*uiout
= current_uiout
;
6884 get_user_print_options (&opts
);
6886 /* Field 4, the address, is omitted (which makes the columns
6887 not line up too nicely with the headers, but the effect
6888 is relatively readable). */
6889 if (opts
.addressprint
)
6890 ui_out_field_skip (uiout
, "addr");
6892 ui_out_text (uiout
, "exec");
6893 if (c
->exec_pathname
!= NULL
)
6895 ui_out_text (uiout
, ", program \"");
6896 ui_out_field_string (uiout
, "what", c
->exec_pathname
);
6897 ui_out_text (uiout
, "\" ");
6902 print_mention_catch_exec (struct breakpoint
*b
)
6904 printf_filtered (_("Catchpoint %d (exec)"), b
->number
);
6907 /* Implement the "print_recreate" breakpoint_ops method for exec
6911 print_recreate_catch_exec (struct breakpoint
*b
, struct ui_file
*fp
)
6913 fprintf_unfiltered (fp
, "catch exec");
6914 print_recreate_thread (b
, fp
);
6917 static struct breakpoint_ops catch_exec_breakpoint_ops
;
6920 create_syscall_event_catchpoint (int tempflag
, VEC(int) *filter
,
6921 const struct breakpoint_ops
*ops
)
6923 struct syscall_catchpoint
*c
;
6924 struct gdbarch
*gdbarch
= get_current_arch ();
6926 c
= XNEW (struct syscall_catchpoint
);
6927 init_catchpoint (&c
->base
, gdbarch
, tempflag
, NULL
, ops
);
6928 c
->syscalls_to_be_caught
= filter
;
6930 install_breakpoint (0, &c
->base
, 1);
6934 hw_breakpoint_used_count (void)
6937 struct breakpoint
*b
;
6938 struct bp_location
*bl
;
6942 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
6943 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
6945 /* Special types of hardware breakpoints may use more than
6947 i
+= b
->ops
->resources_needed (bl
);
6954 /* Returns the resources B would use if it were a hardware
6958 hw_watchpoint_use_count (struct breakpoint
*b
)
6961 struct bp_location
*bl
;
6963 if (!breakpoint_enabled (b
))
6966 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
6968 /* Special types of hardware watchpoints may use more than
6970 i
+= b
->ops
->resources_needed (bl
);
6976 /* Returns the sum the used resources of all hardware watchpoints of
6977 type TYPE in the breakpoints list. Also returns in OTHER_TYPE_USED
6978 the sum of the used resources of all hardware watchpoints of other
6979 types _not_ TYPE. */
6982 hw_watchpoint_used_count_others (struct breakpoint
*except
,
6983 enum bptype type
, int *other_type_used
)
6986 struct breakpoint
*b
;
6988 *other_type_used
= 0;
6993 if (!breakpoint_enabled (b
))
6996 if (b
->type
== type
)
6997 i
+= hw_watchpoint_use_count (b
);
6998 else if (is_hardware_watchpoint (b
))
6999 *other_type_used
= 1;
7006 disable_watchpoints_before_interactive_call_start (void)
7008 struct breakpoint
*b
;
7012 if (is_watchpoint (b
) && breakpoint_enabled (b
))
7014 b
->enable_state
= bp_call_disabled
;
7015 update_global_location_list (0);
7021 enable_watchpoints_after_interactive_call_stop (void)
7023 struct breakpoint
*b
;
7027 if (is_watchpoint (b
) && b
->enable_state
== bp_call_disabled
)
7029 b
->enable_state
= bp_enabled
;
7030 update_global_location_list (1);
7036 disable_breakpoints_before_startup (void)
7038 current_program_space
->executing_startup
= 1;
7039 update_global_location_list (0);
7043 enable_breakpoints_after_startup (void)
7045 current_program_space
->executing_startup
= 0;
7046 breakpoint_re_set ();
7050 /* Set a breakpoint that will evaporate an end of command
7051 at address specified by SAL.
7052 Restrict it to frame FRAME if FRAME is nonzero. */
7055 set_momentary_breakpoint (struct gdbarch
*gdbarch
, struct symtab_and_line sal
,
7056 struct frame_id frame_id
, enum bptype type
)
7058 struct breakpoint
*b
;
7060 /* If FRAME_ID is valid, it should be a real frame, not an inlined
7062 gdb_assert (!frame_id_inlined_p (frame_id
));
7064 b
= set_raw_breakpoint (gdbarch
, sal
, type
, &momentary_breakpoint_ops
);
7065 b
->enable_state
= bp_enabled
;
7066 b
->disposition
= disp_donttouch
;
7067 b
->frame_id
= frame_id
;
7069 /* If we're debugging a multi-threaded program, then we want
7070 momentary breakpoints to be active in only a single thread of
7072 if (in_thread_list (inferior_ptid
))
7073 b
->thread
= pid_to_thread_id (inferior_ptid
);
7075 update_global_location_list_nothrow (1);
7080 /* Make a momentary breakpoint based on the master breakpoint ORIG.
7081 The new breakpoint will have type TYPE, and use OPS as it
7084 static struct breakpoint
*
7085 momentary_breakpoint_from_master (struct breakpoint
*orig
,
7087 const struct breakpoint_ops
*ops
)
7089 struct breakpoint
*copy
;
7091 copy
= set_raw_breakpoint_without_location (orig
->gdbarch
, type
, ops
);
7092 copy
->loc
= allocate_bp_location (copy
);
7093 set_breakpoint_location_function (copy
->loc
, 1);
7095 copy
->loc
->gdbarch
= orig
->loc
->gdbarch
;
7096 copy
->loc
->requested_address
= orig
->loc
->requested_address
;
7097 copy
->loc
->address
= orig
->loc
->address
;
7098 copy
->loc
->section
= orig
->loc
->section
;
7099 copy
->loc
->pspace
= orig
->loc
->pspace
;
7101 if (orig
->loc
->source_file
!= NULL
)
7102 copy
->loc
->source_file
= xstrdup (orig
->loc
->source_file
);
7104 copy
->loc
->line_number
= orig
->loc
->line_number
;
7105 copy
->frame_id
= orig
->frame_id
;
7106 copy
->thread
= orig
->thread
;
7107 copy
->pspace
= orig
->pspace
;
7109 copy
->enable_state
= bp_enabled
;
7110 copy
->disposition
= disp_donttouch
;
7111 copy
->number
= internal_breakpoint_number
--;
7113 update_global_location_list_nothrow (0);
7117 /* Make a deep copy of momentary breakpoint ORIG. Returns NULL if
7121 clone_momentary_breakpoint (struct breakpoint
*orig
)
7123 /* If there's nothing to clone, then return nothing. */
7127 return momentary_breakpoint_from_master (orig
, orig
->type
, orig
->ops
);
7131 set_momentary_breakpoint_at_pc (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
7134 struct symtab_and_line sal
;
7136 sal
= find_pc_line (pc
, 0);
7138 sal
.section
= find_pc_overlay (pc
);
7139 sal
.explicit_pc
= 1;
7141 return set_momentary_breakpoint (gdbarch
, sal
, null_frame_id
, type
);
7145 /* Tell the user we have just set a breakpoint B. */
7148 mention (struct breakpoint
*b
)
7150 b
->ops
->print_mention (b
);
7151 if (ui_out_is_mi_like_p (current_uiout
))
7153 printf_filtered ("\n");
7157 static struct bp_location
*
7158 add_location_to_breakpoint (struct breakpoint
*b
,
7159 const struct symtab_and_line
*sal
)
7161 struct bp_location
*loc
, **tmp
;
7162 CORE_ADDR adjusted_address
;
7163 struct gdbarch
*loc_gdbarch
= get_sal_arch (*sal
);
7165 if (loc_gdbarch
== NULL
)
7166 loc_gdbarch
= b
->gdbarch
;
7168 /* Adjust the breakpoint's address prior to allocating a location.
7169 Once we call allocate_bp_location(), that mostly uninitialized
7170 location will be placed on the location chain. Adjustment of the
7171 breakpoint may cause target_read_memory() to be called and we do
7172 not want its scan of the location chain to find a breakpoint and
7173 location that's only been partially initialized. */
7174 adjusted_address
= adjust_breakpoint_address (loc_gdbarch
,
7177 loc
= allocate_bp_location (b
);
7178 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
7182 loc
->requested_address
= sal
->pc
;
7183 loc
->address
= adjusted_address
;
7184 loc
->pspace
= sal
->pspace
;
7185 gdb_assert (loc
->pspace
!= NULL
);
7186 loc
->section
= sal
->section
;
7187 loc
->gdbarch
= loc_gdbarch
;
7189 if (sal
->symtab
!= NULL
)
7190 loc
->source_file
= xstrdup (sal
->symtab
->filename
);
7191 loc
->line_number
= sal
->line
;
7193 set_breakpoint_location_function (loc
,
7194 sal
->explicit_pc
|| sal
->explicit_line
);
7199 /* Return 1 if LOC is pointing to a permanent breakpoint,
7200 return 0 otherwise. */
7203 bp_loc_is_permanent (struct bp_location
*loc
)
7207 const gdb_byte
*bpoint
;
7208 gdb_byte
*target_mem
;
7209 struct cleanup
*cleanup
;
7212 gdb_assert (loc
!= NULL
);
7214 addr
= loc
->address
;
7215 bpoint
= gdbarch_breakpoint_from_pc (loc
->gdbarch
, &addr
, &len
);
7217 /* Software breakpoints unsupported? */
7221 target_mem
= alloca (len
);
7223 /* Enable the automatic memory restoration from breakpoints while
7224 we read the memory. Otherwise we could say about our temporary
7225 breakpoints they are permanent. */
7226 cleanup
= save_current_space_and_thread ();
7228 switch_to_program_space_and_thread (loc
->pspace
);
7229 make_show_memory_breakpoints_cleanup (0);
7231 if (target_read_memory (loc
->address
, target_mem
, len
) == 0
7232 && memcmp (target_mem
, bpoint
, len
) == 0)
7235 do_cleanups (cleanup
);
7242 /* Create a breakpoint with SAL as location. Use ADDR_STRING
7243 as textual description of the location, and COND_STRING
7244 as condition expression. */
7247 init_breakpoint_sal (struct breakpoint
*b
, struct gdbarch
*gdbarch
,
7248 struct symtabs_and_lines sals
, char *addr_string
,
7249 char *filter
, char *cond_string
,
7250 enum bptype type
, enum bpdisp disposition
,
7251 int thread
, int task
, int ignore_count
,
7252 const struct breakpoint_ops
*ops
, int from_tty
,
7253 int enabled
, int internal
, int display_canonical
)
7257 if (type
== bp_hardware_breakpoint
)
7259 int target_resources_ok
;
7261 i
= hw_breakpoint_used_count ();
7262 target_resources_ok
=
7263 target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
7265 if (target_resources_ok
== 0)
7266 error (_("No hardware breakpoint support in the target."));
7267 else if (target_resources_ok
< 0)
7268 error (_("Hardware breakpoints used exceeds limit."));
7271 gdb_assert (sals
.nelts
> 0);
7273 for (i
= 0; i
< sals
.nelts
; ++i
)
7275 struct symtab_and_line sal
= sals
.sals
[i
];
7276 struct bp_location
*loc
;
7280 struct gdbarch
*loc_gdbarch
= get_sal_arch (sal
);
7282 loc_gdbarch
= gdbarch
;
7284 describe_other_breakpoints (loc_gdbarch
,
7285 sal
.pspace
, sal
.pc
, sal
.section
, thread
);
7290 init_raw_breakpoint (b
, gdbarch
, sal
, type
, ops
);
7294 b
->cond_string
= cond_string
;
7295 b
->ignore_count
= ignore_count
;
7296 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
7297 b
->disposition
= disposition
;
7299 if (type
== bp_static_tracepoint
)
7301 struct tracepoint
*t
= (struct tracepoint
*) b
;
7302 struct static_tracepoint_marker marker
;
7304 if (is_marker_spec (addr_string
))
7306 /* We already know the marker exists, otherwise, we
7307 wouldn't see a sal for it. */
7308 char *p
= &addr_string
[3];
7312 p
= skip_spaces (p
);
7314 endp
= skip_to_space (p
);
7316 marker_str
= savestring (p
, endp
- p
);
7317 t
->static_trace_marker_id
= marker_str
;
7319 printf_filtered (_("Probed static tracepoint "
7321 t
->static_trace_marker_id
);
7323 else if (target_static_tracepoint_marker_at (sal
.pc
, &marker
))
7325 t
->static_trace_marker_id
= xstrdup (marker
.str_id
);
7326 release_static_tracepoint_marker (&marker
);
7328 printf_filtered (_("Probed static tracepoint "
7330 t
->static_trace_marker_id
);
7333 warning (_("Couldn't determine the static "
7334 "tracepoint marker to probe"));
7341 loc
= add_location_to_breakpoint (b
, &sal
);
7344 if (bp_loc_is_permanent (loc
))
7345 make_breakpoint_permanent (b
);
7349 char *arg
= b
->cond_string
;
7350 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
7352 error (_("Garbage %s follows condition"), arg
);
7356 b
->display_canonical
= display_canonical
;
7358 b
->addr_string
= addr_string
;
7360 /* addr_string has to be used or breakpoint_re_set will delete
7363 = xstrprintf ("*%s", paddress (b
->loc
->gdbarch
, b
->loc
->address
));
7368 create_breakpoint_sal (struct gdbarch
*gdbarch
,
7369 struct symtabs_and_lines sals
, char *addr_string
,
7370 char *filter
, char *cond_string
,
7371 enum bptype type
, enum bpdisp disposition
,
7372 int thread
, int task
, int ignore_count
,
7373 const struct breakpoint_ops
*ops
, int from_tty
,
7374 int enabled
, int internal
, int display_canonical
)
7376 struct breakpoint
*b
;
7377 struct cleanup
*old_chain
;
7379 if (is_tracepoint_type (type
))
7381 struct tracepoint
*t
;
7383 t
= XCNEW (struct tracepoint
);
7387 b
= XNEW (struct breakpoint
);
7389 old_chain
= make_cleanup (xfree
, b
);
7391 init_breakpoint_sal (b
, gdbarch
,
7393 filter
, cond_string
,
7395 thread
, task
, ignore_count
,
7397 enabled
, internal
, display_canonical
);
7398 discard_cleanups (old_chain
);
7400 install_breakpoint (internal
, b
, 0);
7403 /* Add SALS.nelts breakpoints to the breakpoint table. For each
7404 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
7405 value. COND_STRING, if not NULL, specified the condition to be
7406 used for all breakpoints. Essentially the only case where
7407 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
7408 function. In that case, it's still not possible to specify
7409 separate conditions for different overloaded functions, so
7410 we take just a single condition string.
7412 NOTE: If the function succeeds, the caller is expected to cleanup
7413 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
7414 array contents). If the function fails (error() is called), the
7415 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
7416 COND and SALS arrays and each of those arrays contents. */
7419 create_breakpoints_sal (struct gdbarch
*gdbarch
,
7420 struct linespec_result
*canonical
,
7422 enum bptype type
, enum bpdisp disposition
,
7423 int thread
, int task
, int ignore_count
,
7424 const struct breakpoint_ops
*ops
, int from_tty
,
7425 int enabled
, int internal
)
7428 struct linespec_sals
*lsal
;
7430 if (canonical
->pre_expanded
)
7431 gdb_assert (VEC_length (linespec_sals
, canonical
->sals
) == 1);
7433 for (i
= 0; VEC_iterate (linespec_sals
, canonical
->sals
, i
, lsal
); ++i
)
7435 /* Note that 'addr_string' can be NULL in the case of a plain
7436 'break', without arguments. */
7437 char *addr_string
= (canonical
->addr_string
7438 ? xstrdup (canonical
->addr_string
)
7440 char *filter_string
= lsal
->canonical
? xstrdup (lsal
->canonical
) : NULL
;
7441 struct cleanup
*inner
= make_cleanup (xfree
, addr_string
);
7443 make_cleanup (xfree
, filter_string
);
7444 create_breakpoint_sal (gdbarch
, lsal
->sals
,
7447 cond_string
, type
, disposition
,
7448 thread
, task
, ignore_count
, ops
,
7449 from_tty
, enabled
, internal
,
7450 canonical
->special_display
);
7451 discard_cleanups (inner
);
7455 /* Parse ADDRESS which is assumed to be a SAL specification possibly
7456 followed by conditionals. On return, SALS contains an array of SAL
7457 addresses found. ADDR_STRING contains a vector of (canonical)
7458 address strings. ADDRESS points to the end of the SAL.
7460 The array and the line spec strings are allocated on the heap, it is
7461 the caller's responsibility to free them. */
7464 parse_breakpoint_sals (char **address
,
7465 struct linespec_result
*canonical
)
7467 char *addr_start
= *address
;
7469 /* If no arg given, or if first arg is 'if ', use the default
7471 if ((*address
) == NULL
7472 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
7474 /* The last displayed codepoint, if it's valid, is our default breakpoint
7476 if (last_displayed_sal_is_valid ())
7478 struct linespec_sals lsal
;
7479 struct symtab_and_line sal
;
7481 init_sal (&sal
); /* Initialize to zeroes. */
7482 lsal
.sals
.sals
= (struct symtab_and_line
*)
7483 xmalloc (sizeof (struct symtab_and_line
));
7485 /* Set sal's pspace, pc, symtab, and line to the values
7486 corresponding to the last call to print_frame_info. */
7487 get_last_displayed_sal (&sal
);
7488 sal
.section
= find_pc_overlay (sal
.pc
);
7490 /* "break" without arguments is equivalent to "break *PC"
7491 where PC is the last displayed codepoint's address. So
7492 make sure to set sal.explicit_pc to prevent GDB from
7493 trying to expand the list of sals to include all other
7494 instances with the same symtab and line. */
7495 sal
.explicit_pc
= 1;
7497 lsal
.sals
.sals
[0] = sal
;
7498 lsal
.sals
.nelts
= 1;
7499 lsal
.canonical
= NULL
;
7501 VEC_safe_push (linespec_sals
, canonical
->sals
, &lsal
);
7504 error (_("No default breakpoint address now."));
7508 /* Force almost all breakpoints to be in terms of the
7509 current_source_symtab (which is decode_line_1's default).
7510 This should produce the results we want almost all of the
7511 time while leaving default_breakpoint_* alone. */
7512 if (last_displayed_sal_is_valid ())
7513 decode_line_full (address
, DECODE_LINE_FUNFIRSTLINE
,
7514 get_last_displayed_symtab (),
7515 get_last_displayed_line (),
7516 canonical
, NULL
, NULL
);
7518 decode_line_full (address
, DECODE_LINE_FUNFIRSTLINE
,
7519 (struct symtab
*) NULL
, 0,
7520 canonical
, NULL
, NULL
);
7525 /* Convert each SAL into a real PC. Verify that the PC can be
7526 inserted as a breakpoint. If it can't throw an error. */
7529 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
)
7533 for (i
= 0; i
< sals
->nelts
; i
++)
7534 resolve_sal_pc (&sals
->sals
[i
]);
7537 /* Fast tracepoints may have restrictions on valid locations. For
7538 instance, a fast tracepoint using a jump instead of a trap will
7539 likely have to overwrite more bytes than a trap would, and so can
7540 only be placed where the instruction is longer than the jump, or a
7541 multi-instruction sequence does not have a jump into the middle of
7545 check_fast_tracepoint_sals (struct gdbarch
*gdbarch
,
7546 struct symtabs_and_lines
*sals
)
7549 struct symtab_and_line
*sal
;
7551 struct cleanup
*old_chain
;
7553 for (i
= 0; i
< sals
->nelts
; i
++)
7555 struct gdbarch
*sarch
;
7557 sal
= &sals
->sals
[i
];
7559 sarch
= get_sal_arch (*sal
);
7560 /* We fall back to GDBARCH if there is no architecture
7561 associated with SAL. */
7564 rslt
= gdbarch_fast_tracepoint_valid_at (sarch
, sal
->pc
,
7566 old_chain
= make_cleanup (xfree
, msg
);
7569 error (_("May not have a fast tracepoint at 0x%s%s"),
7570 paddress (sarch
, sal
->pc
), (msg
? msg
: ""));
7572 do_cleanups (old_chain
);
7576 /* Given TOK, a string specification of condition and thread, as
7577 accepted by the 'break' command, extract the condition
7578 string and thread number and set *COND_STRING and *THREAD.
7579 PC identifies the context at which the condition should be parsed.
7580 If no condition is found, *COND_STRING is set to NULL.
7581 If no thread is found, *THREAD is set to -1. */
7583 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
7584 char **cond_string
, int *thread
, int *task
)
7586 *cond_string
= NULL
;
7592 char *cond_start
= NULL
;
7593 char *cond_end
= NULL
;
7595 tok
= skip_spaces (tok
);
7597 end_tok
= skip_to_space (tok
);
7599 toklen
= end_tok
- tok
;
7601 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
7603 struct expression
*expr
;
7605 tok
= cond_start
= end_tok
+ 1;
7606 expr
= parse_exp_1 (&tok
, block_for_pc (pc
), 0);
7609 *cond_string
= savestring (cond_start
,
7610 cond_end
- cond_start
);
7612 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
7618 *thread
= strtol (tok
, &tok
, 0);
7620 error (_("Junk after thread keyword."));
7621 if (!valid_thread_id (*thread
))
7622 error (_("Unknown thread %d."), *thread
);
7624 else if (toklen
>= 1 && strncmp (tok
, "task", toklen
) == 0)
7630 *task
= strtol (tok
, &tok
, 0);
7632 error (_("Junk after task keyword."));
7633 if (!valid_task_id (*task
))
7634 error (_("Unknown task %d."), *task
);
7637 error (_("Junk at end of arguments."));
7641 /* Decode a static tracepoint marker spec. */
7643 static struct symtabs_and_lines
7644 decode_static_tracepoint_spec (char **arg_p
)
7646 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
7647 struct symtabs_and_lines sals
;
7648 struct symtab_and_line sal
;
7650 struct cleanup
*old_chain
;
7651 char *p
= &(*arg_p
)[3];
7656 p
= skip_spaces (p
);
7658 endp
= skip_to_space (p
);
7660 marker_str
= savestring (p
, endp
- p
);
7661 old_chain
= make_cleanup (xfree
, marker_str
);
7663 markers
= target_static_tracepoint_markers_by_strid (marker_str
);
7664 if (VEC_empty(static_tracepoint_marker_p
, markers
))
7665 error (_("No known static tracepoint marker named %s"), marker_str
);
7667 sals
.nelts
= VEC_length(static_tracepoint_marker_p
, markers
);
7668 sals
.sals
= xmalloc (sizeof *sals
.sals
* sals
.nelts
);
7670 for (i
= 0; i
< sals
.nelts
; i
++)
7672 struct static_tracepoint_marker
*marker
;
7674 marker
= VEC_index (static_tracepoint_marker_p
, markers
, i
);
7676 init_sal (&sals
.sals
[i
]);
7678 sals
.sals
[i
] = find_pc_line (marker
->address
, 0);
7679 sals
.sals
[i
].pc
= marker
->address
;
7681 release_static_tracepoint_marker (marker
);
7684 do_cleanups (old_chain
);
7690 /* Set a breakpoint. This function is shared between CLI and MI
7691 functions for setting a breakpoint. This function has two major
7692 modes of operations, selected by the PARSE_CONDITION_AND_THREAD
7693 parameter. If non-zero, the function will parse arg, extracting
7694 breakpoint location, address and thread. Otherwise, ARG is just
7695 the location of breakpoint, with condition and thread specified by
7696 the COND_STRING and THREAD parameters. If INTERNAL is non-zero,
7697 the breakpoint number will be allocated from the internal
7698 breakpoint count. Returns true if any breakpoint was created;
7702 create_breakpoint (struct gdbarch
*gdbarch
,
7703 char *arg
, char *cond_string
, int thread
,
7704 int parse_condition_and_thread
,
7705 int tempflag
, enum bptype type_wanted
,
7707 enum auto_boolean pending_break_support
,
7708 const struct breakpoint_ops
*ops
,
7709 int from_tty
, int enabled
, int internal
)
7711 volatile struct gdb_exception e
;
7712 char *copy_arg
= NULL
;
7713 char *addr_start
= arg
;
7714 struct linespec_result canonical
;
7715 struct cleanup
*old_chain
;
7716 struct cleanup
*bkpt_chain
= NULL
;
7720 int prev_bkpt_count
= breakpoint_count
;
7722 gdb_assert (ops
!= NULL
);
7724 init_linespec_result (&canonical
);
7726 if (type_wanted
== bp_static_tracepoint
&& is_marker_spec (arg
))
7729 struct linespec_sals lsal
;
7731 lsal
.sals
= decode_static_tracepoint_spec (&arg
);
7733 copy_arg
= savestring (addr_start
, arg
- addr_start
);
7735 canonical
.addr_string
= xstrdup (copy_arg
);
7736 lsal
.canonical
= xstrdup (copy_arg
);
7737 VEC_safe_push (linespec_sals
, canonical
.sals
, &lsal
);
7742 TRY_CATCH (e
, RETURN_MASK_ALL
)
7744 parse_breakpoint_sals (&arg
, &canonical
);
7747 /* If caller is interested in rc value from parse, set value. */
7751 throw_exception (e
);
7755 case NOT_FOUND_ERROR
:
7757 /* If pending breakpoint support is turned off, throw
7760 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
7761 throw_exception (e
);
7763 exception_print (gdb_stderr
, e
);
7765 /* If pending breakpoint support is auto query and the user
7766 selects no, then simply return the error code. */
7767 if (pending_break_support
== AUTO_BOOLEAN_AUTO
7768 && !nquery (_("Make %s pending on future shared library load? "),
7769 bptype_string (type_wanted
)))
7772 /* At this point, either the user was queried about setting
7773 a pending breakpoint and selected yes, or pending
7774 breakpoint behavior is on and thus a pending breakpoint
7775 is defaulted on behalf of the user. */
7777 struct linespec_sals lsal
;
7779 copy_arg
= xstrdup (addr_start
);
7780 lsal
.canonical
= xstrdup (copy_arg
);
7781 lsal
.sals
.nelts
= 1;
7782 lsal
.sals
.sals
= XNEW (struct symtab_and_line
);
7783 init_sal (&lsal
.sals
.sals
[0]);
7785 VEC_safe_push (linespec_sals
, canonical
.sals
, &lsal
);
7789 throw_exception (e
);
7793 if (VEC_empty (linespec_sals
, canonical
.sals
))
7799 /* Create a chain of things that always need to be cleaned up. */
7800 old_chain
= make_cleanup_destroy_linespec_result (&canonical
);
7802 /* ----------------------------- SNIP -----------------------------
7803 Anything added to the cleanup chain beyond this point is assumed
7804 to be part of a breakpoint. If the breakpoint create succeeds
7805 then the memory is not reclaimed. */
7806 bkpt_chain
= make_cleanup (null_cleanup
, 0);
7808 /* Resolve all line numbers to PC's and verify that the addresses
7809 are ok for the target. */
7813 struct linespec_sals
*iter
;
7815 for (ix
= 0; VEC_iterate (linespec_sals
, canonical
.sals
, ix
, iter
); ++ix
)
7816 breakpoint_sals_to_pc (&iter
->sals
);
7819 /* Fast tracepoints may have additional restrictions on location. */
7820 if (!pending
&& type_wanted
== bp_fast_tracepoint
)
7823 struct linespec_sals
*iter
;
7825 for (ix
= 0; VEC_iterate (linespec_sals
, canonical
.sals
, ix
, iter
); ++ix
)
7826 check_fast_tracepoint_sals (gdbarch
, &iter
->sals
);
7829 /* Verify that condition can be parsed, before setting any
7830 breakpoints. Allocate a separate condition expression for each
7834 struct linespec_sals
*lsal
;
7836 lsal
= VEC_index (linespec_sals
, canonical
.sals
, 0);
7838 if (parse_condition_and_thread
)
7840 /* Here we only parse 'arg' to separate condition
7841 from thread number, so parsing in context of first
7842 sal is OK. When setting the breakpoint we'll
7843 re-parse it in context of each sal. */
7846 find_condition_and_thread (arg
, lsal
->sals
.sals
[0].pc
, &cond_string
,
7849 make_cleanup (xfree
, cond_string
);
7853 /* Create a private copy of condition string. */
7856 cond_string
= xstrdup (cond_string
);
7857 make_cleanup (xfree
, cond_string
);
7861 /* If the user is creating a static tracepoint by marker id
7862 (strace -m MARKER_ID), then store the sals index, so that
7863 breakpoint_re_set can try to match up which of the newly
7864 found markers corresponds to this one, and, don't try to
7865 expand multiple locations for each sal, given than SALS
7866 already should contain all sals for MARKER_ID. */
7867 if (type_wanted
== bp_static_tracepoint
7868 && is_marker_spec (copy_arg
))
7872 for (i
= 0; i
< lsal
->sals
.nelts
; ++i
)
7874 struct symtabs_and_lines expanded
;
7875 struct tracepoint
*tp
;
7876 struct cleanup
*old_chain
;
7880 expanded
.sals
= &lsal
->sals
.sals
[i
];
7882 addr_string
= xstrdup (canonical
.addr_string
);
7883 old_chain
= make_cleanup (xfree
, addr_string
);
7885 tp
= XCNEW (struct tracepoint
);
7886 init_breakpoint_sal (&tp
->base
, gdbarch
, expanded
,
7888 cond_string
, type_wanted
,
7889 tempflag
? disp_del
: disp_donttouch
,
7890 thread
, task
, ignore_count
, ops
,
7891 from_tty
, enabled
, internal
,
7892 canonical
.special_display
);
7893 /* Given that its possible to have multiple markers with
7894 the same string id, if the user is creating a static
7895 tracepoint by marker id ("strace -m MARKER_ID"), then
7896 store the sals index, so that breakpoint_re_set can
7897 try to match up which of the newly found markers
7898 corresponds to this one */
7899 tp
->static_trace_marker_id_idx
= i
;
7901 install_breakpoint (internal
, &tp
->base
, 0);
7903 discard_cleanups (old_chain
);
7907 create_breakpoints_sal (gdbarch
, &canonical
, cond_string
,
7909 tempflag
? disp_del
: disp_donttouch
,
7910 thread
, task
, ignore_count
, ops
, from_tty
,
7915 struct breakpoint
*b
;
7917 make_cleanup (xfree
, copy_arg
);
7919 if (is_tracepoint_type (type_wanted
))
7921 struct tracepoint
*t
;
7923 t
= XCNEW (struct tracepoint
);
7927 b
= XNEW (struct breakpoint
);
7929 init_raw_breakpoint_without_location (b
, gdbarch
, type_wanted
, ops
);
7931 b
->addr_string
= copy_arg
;
7932 b
->cond_string
= NULL
;
7933 b
->ignore_count
= ignore_count
;
7934 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
7935 b
->condition_not_parsed
= 1;
7936 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
7937 if (type_wanted
!= bp_breakpoint
&& type_wanted
!= bp_hardware_breakpoint
)
7938 b
->pspace
= current_program_space
;
7940 install_breakpoint (internal
, b
, 0);
7943 if (VEC_length (linespec_sals
, canonical
.sals
) > 1)
7945 warning (_("Multiple breakpoints were set.\nUse the "
7946 "\"delete\" command to delete unwanted breakpoints."));
7947 prev_breakpoint_count
= prev_bkpt_count
;
7950 /* That's it. Discard the cleanups for data inserted into the
7952 discard_cleanups (bkpt_chain
);
7953 /* But cleanup everything else. */
7954 do_cleanups (old_chain
);
7956 /* error call may happen here - have BKPT_CHAIN already discarded. */
7957 update_global_location_list (1);
7962 /* Set a breakpoint.
7963 ARG is a string describing breakpoint address,
7964 condition, and thread.
7965 FLAG specifies if a breakpoint is hardware on,
7966 and if breakpoint is temporary, using BP_HARDWARE_FLAG
7970 break_command_1 (char *arg
, int flag
, int from_tty
)
7972 int tempflag
= flag
& BP_TEMPFLAG
;
7973 enum bptype type_wanted
= (flag
& BP_HARDWAREFLAG
7974 ? bp_hardware_breakpoint
7977 create_breakpoint (get_current_arch (),
7979 NULL
, 0, 1 /* parse arg */,
7980 tempflag
, type_wanted
,
7981 0 /* Ignore count */,
7982 pending_break_support
,
7983 &bkpt_breakpoint_ops
,
7989 /* Helper function for break_command_1 and disassemble_command. */
7992 resolve_sal_pc (struct symtab_and_line
*sal
)
7996 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
7998 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
7999 error (_("No line %d in file \"%s\"."),
8000 sal
->line
, sal
->symtab
->filename
);
8003 /* If this SAL corresponds to a breakpoint inserted using a line
8004 number, then skip the function prologue if necessary. */
8005 if (sal
->explicit_line
)
8006 skip_prologue_sal (sal
);
8009 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
8011 struct blockvector
*bv
;
8015 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
8018 sym
= block_linkage_function (b
);
8021 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
8022 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
8026 /* It really is worthwhile to have the section, so we'll
8027 just have to look harder. This case can be executed
8028 if we have line numbers but no functions (as can
8029 happen in assembly source). */
8031 struct minimal_symbol
*msym
;
8032 struct cleanup
*old_chain
= save_current_space_and_thread ();
8034 switch_to_program_space_and_thread (sal
->pspace
);
8036 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
8038 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
8040 do_cleanups (old_chain
);
8047 break_command (char *arg
, int from_tty
)
8049 break_command_1 (arg
, 0, from_tty
);
8053 tbreak_command (char *arg
, int from_tty
)
8055 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
8059 hbreak_command (char *arg
, int from_tty
)
8061 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
8065 thbreak_command (char *arg
, int from_tty
)
8067 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
8071 stop_command (char *arg
, int from_tty
)
8073 printf_filtered (_("Specify the type of breakpoint to set.\n\
8074 Usage: stop in <function | address>\n\
8075 stop at <line>\n"));
8079 stopin_command (char *arg
, int from_tty
)
8083 if (arg
== (char *) NULL
)
8085 else if (*arg
!= '*')
8090 /* Look for a ':'. If this is a line number specification, then
8091 say it is bad, otherwise, it should be an address or
8092 function/method name. */
8093 while (*argptr
&& !hasColon
)
8095 hasColon
= (*argptr
== ':');
8100 badInput
= (*argptr
!= ':'); /* Not a class::method */
8102 badInput
= isdigit (*arg
); /* a simple line number */
8106 printf_filtered (_("Usage: stop in <function | address>\n"));
8108 break_command_1 (arg
, 0, from_tty
);
8112 stopat_command (char *arg
, int from_tty
)
8116 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
8123 /* Look for a ':'. If there is a '::' then get out, otherwise
8124 it is probably a line number. */
8125 while (*argptr
&& !hasColon
)
8127 hasColon
= (*argptr
== ':');
8132 badInput
= (*argptr
== ':'); /* we have class::method */
8134 badInput
= !isdigit (*arg
); /* not a line number */
8138 printf_filtered (_("Usage: stop at <line>\n"));
8140 break_command_1 (arg
, 0, from_tty
);
8143 /* Implement the "breakpoint_hit" breakpoint_ops method for
8144 ranged breakpoints. */
8147 breakpoint_hit_ranged_breakpoint (const struct bp_location
*bl
,
8148 struct address_space
*aspace
,
8151 return breakpoint_address_match_range (bl
->pspace
->aspace
, bl
->address
,
8152 bl
->length
, aspace
, bp_addr
);
8155 /* Implement the "resources_needed" breakpoint_ops method for
8156 ranged breakpoints. */
8159 resources_needed_ranged_breakpoint (const struct bp_location
*bl
)
8161 return target_ranged_break_num_registers ();
8164 /* Implement the "print_it" breakpoint_ops method for
8165 ranged breakpoints. */
8167 static enum print_stop_action
8168 print_it_ranged_breakpoint (bpstat bs
)
8170 struct breakpoint
*b
= bs
->breakpoint_at
;
8171 struct bp_location
*bl
= b
->loc
;
8172 struct ui_out
*uiout
= current_uiout
;
8174 gdb_assert (b
->type
== bp_hardware_breakpoint
);
8176 /* Ranged breakpoints have only one location. */
8177 gdb_assert (bl
&& bl
->next
== NULL
);
8179 annotate_breakpoint (b
->number
);
8180 if (b
->disposition
== disp_del
)
8181 ui_out_text (uiout
, "\nTemporary ranged breakpoint ");
8183 ui_out_text (uiout
, "\nRanged breakpoint ");
8184 if (ui_out_is_mi_like_p (uiout
))
8186 ui_out_field_string (uiout
, "reason",
8187 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
8188 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
8190 ui_out_field_int (uiout
, "bkptno", b
->number
);
8191 ui_out_text (uiout
, ", ");
8193 return PRINT_SRC_AND_LOC
;
8196 /* Implement the "print_one" breakpoint_ops method for
8197 ranged breakpoints. */
8200 print_one_ranged_breakpoint (struct breakpoint
*b
,
8201 struct bp_location
**last_loc
)
8203 struct bp_location
*bl
= b
->loc
;
8204 struct value_print_options opts
;
8205 struct ui_out
*uiout
= current_uiout
;
8207 /* Ranged breakpoints have only one location. */
8208 gdb_assert (bl
&& bl
->next
== NULL
);
8210 get_user_print_options (&opts
);
8212 if (opts
.addressprint
)
8213 /* We don't print the address range here, it will be printed later
8214 by print_one_detail_ranged_breakpoint. */
8215 ui_out_field_skip (uiout
, "addr");
8217 print_breakpoint_location (b
, bl
);
8221 /* Implement the "print_one_detail" breakpoint_ops method for
8222 ranged breakpoints. */
8225 print_one_detail_ranged_breakpoint (const struct breakpoint
*b
,
8226 struct ui_out
*uiout
)
8228 CORE_ADDR address_start
, address_end
;
8229 struct bp_location
*bl
= b
->loc
;
8230 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
8231 struct cleanup
*cleanup
= make_cleanup_ui_out_stream_delete (stb
);
8235 address_start
= bl
->address
;
8236 address_end
= address_start
+ bl
->length
- 1;
8238 ui_out_text (uiout
, "\taddress range: ");
8239 fprintf_unfiltered (stb
->stream
, "[%s, %s]",
8240 print_core_address (bl
->gdbarch
, address_start
),
8241 print_core_address (bl
->gdbarch
, address_end
));
8242 ui_out_field_stream (uiout
, "addr", stb
);
8243 ui_out_text (uiout
, "\n");
8245 do_cleanups (cleanup
);
8248 /* Implement the "print_mention" breakpoint_ops method for
8249 ranged breakpoints. */
8252 print_mention_ranged_breakpoint (struct breakpoint
*b
)
8254 struct bp_location
*bl
= b
->loc
;
8255 struct ui_out
*uiout
= current_uiout
;
8258 gdb_assert (b
->type
== bp_hardware_breakpoint
);
8260 if (ui_out_is_mi_like_p (uiout
))
8263 printf_filtered (_("Hardware assisted ranged breakpoint %d from %s to %s."),
8264 b
->number
, paddress (bl
->gdbarch
, bl
->address
),
8265 paddress (bl
->gdbarch
, bl
->address
+ bl
->length
- 1));
8268 /* Implement the "print_recreate" breakpoint_ops method for
8269 ranged breakpoints. */
8272 print_recreate_ranged_breakpoint (struct breakpoint
*b
, struct ui_file
*fp
)
8274 fprintf_unfiltered (fp
, "break-range %s, %s", b
->addr_string
,
8275 b
->addr_string_range_end
);
8276 print_recreate_thread (b
, fp
);
8279 /* The breakpoint_ops structure to be used in ranged breakpoints. */
8281 static struct breakpoint_ops ranged_breakpoint_ops
;
8283 /* Find the address where the end of the breakpoint range should be
8284 placed, given the SAL of the end of the range. This is so that if
8285 the user provides a line number, the end of the range is set to the
8286 last instruction of the given line. */
8289 find_breakpoint_range_end (struct symtab_and_line sal
)
8293 /* If the user provided a PC value, use it. Otherwise,
8294 find the address of the end of the given location. */
8295 if (sal
.explicit_pc
)
8302 ret
= find_line_pc_range (sal
, &start
, &end
);
8304 error (_("Could not find location of the end of the range."));
8306 /* find_line_pc_range returns the start of the next line. */
8313 /* Implement the "break-range" CLI command. */
8316 break_range_command (char *arg
, int from_tty
)
8318 char *arg_start
, *addr_string_start
, *addr_string_end
;
8319 struct linespec_result canonical_start
, canonical_end
;
8320 int bp_count
, can_use_bp
, length
;
8322 struct breakpoint
*b
;
8323 struct symtab_and_line sal_start
, sal_end
;
8324 struct cleanup
*cleanup_bkpt
;
8325 struct linespec_sals
*lsal_start
, *lsal_end
;
8327 /* We don't support software ranged breakpoints. */
8328 if (target_ranged_break_num_registers () < 0)
8329 error (_("This target does not support hardware ranged breakpoints."));
8331 bp_count
= hw_breakpoint_used_count ();
8332 bp_count
+= target_ranged_break_num_registers ();
8333 can_use_bp
= target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
8336 error (_("Hardware breakpoints used exceeds limit."));
8338 arg
= skip_spaces (arg
);
8339 if (arg
== NULL
|| arg
[0] == '\0')
8340 error(_("No address range specified."));
8342 init_linespec_result (&canonical_start
);
8345 parse_breakpoint_sals (&arg
, &canonical_start
);
8347 cleanup_bkpt
= make_cleanup_destroy_linespec_result (&canonical_start
);
8350 error (_("Too few arguments."));
8351 else if (VEC_empty (linespec_sals
, canonical_start
.sals
))
8352 error (_("Could not find location of the beginning of the range."));
8354 lsal_start
= VEC_index (linespec_sals
, canonical_start
.sals
, 0);
8356 if (VEC_length (linespec_sals
, canonical_start
.sals
) > 1
8357 || lsal_start
->sals
.nelts
!= 1)
8358 error (_("Cannot create a ranged breakpoint with multiple locations."));
8360 sal_start
= lsal_start
->sals
.sals
[0];
8361 addr_string_start
= savestring (arg_start
, arg
- arg_start
);
8362 make_cleanup (xfree
, addr_string_start
);
8364 arg
++; /* Skip the comma. */
8365 arg
= skip_spaces (arg
);
8367 /* Parse the end location. */
8369 init_linespec_result (&canonical_end
);
8372 /* We call decode_line_full directly here instead of using
8373 parse_breakpoint_sals because we need to specify the start location's
8374 symtab and line as the default symtab and line for the end of the
8375 range. This makes it possible to have ranges like "foo.c:27, +14",
8376 where +14 means 14 lines from the start location. */
8377 decode_line_full (&arg
, DECODE_LINE_FUNFIRSTLINE
,
8378 sal_start
.symtab
, sal_start
.line
,
8379 &canonical_end
, NULL
, NULL
);
8381 make_cleanup_destroy_linespec_result (&canonical_end
);
8383 if (VEC_empty (linespec_sals
, canonical_end
.sals
))
8384 error (_("Could not find location of the end of the range."));
8386 lsal_end
= VEC_index (linespec_sals
, canonical_end
.sals
, 0);
8387 if (VEC_length (linespec_sals
, canonical_end
.sals
) > 1
8388 || lsal_end
->sals
.nelts
!= 1)
8389 error (_("Cannot create a ranged breakpoint with multiple locations."));
8391 sal_end
= lsal_end
->sals
.sals
[0];
8392 addr_string_end
= savestring (arg_start
, arg
- arg_start
);
8393 make_cleanup (xfree
, addr_string_end
);
8395 end
= find_breakpoint_range_end (sal_end
);
8396 if (sal_start
.pc
> end
)
8397 error (_("Invalid address range, end precedes start."));
8399 length
= end
- sal_start
.pc
+ 1;
8401 /* Length overflowed. */
8402 error (_("Address range too large."));
8403 else if (length
== 1)
8405 /* This range is simple enough to be handled by
8406 the `hbreak' command. */
8407 hbreak_command (addr_string_start
, 1);
8409 do_cleanups (cleanup_bkpt
);
8414 /* Now set up the breakpoint. */
8415 b
= set_raw_breakpoint (get_current_arch (), sal_start
,
8416 bp_hardware_breakpoint
, &ranged_breakpoint_ops
);
8417 set_breakpoint_count (breakpoint_count
+ 1);
8418 b
->number
= breakpoint_count
;
8419 b
->disposition
= disp_donttouch
;
8420 b
->addr_string
= xstrdup (addr_string_start
);
8421 b
->addr_string_range_end
= xstrdup (addr_string_end
);
8422 b
->loc
->length
= length
;
8424 do_cleanups (cleanup_bkpt
);
8427 observer_notify_breakpoint_created (b
);
8428 update_global_location_list (1);
8431 /* Return non-zero if EXP is verified as constant. Returned zero
8432 means EXP is variable. Also the constant detection may fail for
8433 some constant expressions and in such case still falsely return
8436 watchpoint_exp_is_const (const struct expression
*exp
)
8444 /* We are only interested in the descriptor of each element. */
8445 operator_length (exp
, i
, &oplenp
, &argsp
);
8448 switch (exp
->elts
[i
].opcode
)
8458 case BINOP_LOGICAL_AND
:
8459 case BINOP_LOGICAL_OR
:
8460 case BINOP_BITWISE_AND
:
8461 case BINOP_BITWISE_IOR
:
8462 case BINOP_BITWISE_XOR
:
8464 case BINOP_NOTEQUAL
:
8480 case TERNOP_SLICE_COUNT
:
8492 case OP_OBJC_NSSTRING
:
8495 case UNOP_LOGICAL_NOT
:
8496 case UNOP_COMPLEMENT
:
8499 /* Unary, binary and ternary operators: We have to check
8500 their operands. If they are constant, then so is the
8501 result of that operation. For instance, if A and B are
8502 determined to be constants, then so is "A + B".
8504 UNOP_IND is one exception to the rule above, because the
8505 value of *ADDR is not necessarily a constant, even when
8510 /* Check whether the associated symbol is a constant.
8512 We use SYMBOL_CLASS rather than TYPE_CONST because it's
8513 possible that a buggy compiler could mark a variable as
8514 constant even when it is not, and TYPE_CONST would return
8515 true in this case, while SYMBOL_CLASS wouldn't.
8517 We also have to check for function symbols because they
8518 are always constant. */
8520 struct symbol
*s
= exp
->elts
[i
+ 2].symbol
;
8522 if (SYMBOL_CLASS (s
) != LOC_BLOCK
8523 && SYMBOL_CLASS (s
) != LOC_CONST
8524 && SYMBOL_CLASS (s
) != LOC_CONST_BYTES
)
8529 /* The default action is to return 0 because we are using
8530 the optimistic approach here: If we don't know something,
8531 then it is not a constant. */
8540 /* Implement the "dtor" breakpoint_ops method for watchpoints. */
8543 dtor_watchpoint (struct breakpoint
*self
)
8545 struct watchpoint
*w
= (struct watchpoint
*) self
;
8547 xfree (w
->cond_exp
);
8549 xfree (w
->exp_string
);
8550 xfree (w
->exp_string_reparse
);
8551 value_free (w
->val
);
8553 base_breakpoint_ops
.dtor (self
);
8556 /* Implement the "re_set" breakpoint_ops method for watchpoints. */
8559 re_set_watchpoint (struct breakpoint
*b
)
8561 struct watchpoint
*w
= (struct watchpoint
*) b
;
8563 /* Watchpoint can be either on expression using entirely global
8564 variables, or it can be on local variables.
8566 Watchpoints of the first kind are never auto-deleted, and even
8567 persist across program restarts. Since they can use variables
8568 from shared libraries, we need to reparse expression as libraries
8569 are loaded and unloaded.
8571 Watchpoints on local variables can also change meaning as result
8572 of solib event. For example, if a watchpoint uses both a local
8573 and a global variables in expression, it's a local watchpoint,
8574 but unloading of a shared library will make the expression
8575 invalid. This is not a very common use case, but we still
8576 re-evaluate expression, to avoid surprises to the user.
8578 Note that for local watchpoints, we re-evaluate it only if
8579 watchpoints frame id is still valid. If it's not, it means the
8580 watchpoint is out of scope and will be deleted soon. In fact,
8581 I'm not sure we'll ever be called in this case.
8583 If a local watchpoint's frame id is still valid, then
8584 w->exp_valid_block is likewise valid, and we can safely use it.
8586 Don't do anything about disabled watchpoints, since they will be
8587 reevaluated again when enabled. */
8588 update_watchpoint (w
, 1 /* reparse */);
8591 /* Implement the "insert" breakpoint_ops method for hardware watchpoints. */
8594 insert_watchpoint (struct bp_location
*bl
)
8596 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8597 int length
= w
->exact
? 1 : bl
->length
;
8599 return target_insert_watchpoint (bl
->address
, length
, bl
->watchpoint_type
,
8603 /* Implement the "remove" breakpoint_ops method for hardware watchpoints. */
8606 remove_watchpoint (struct bp_location
*bl
)
8608 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8609 int length
= w
->exact
? 1 : bl
->length
;
8611 return target_remove_watchpoint (bl
->address
, length
, bl
->watchpoint_type
,
8616 breakpoint_hit_watchpoint (const struct bp_location
*bl
,
8617 struct address_space
*aspace
, CORE_ADDR bp_addr
)
8619 struct breakpoint
*b
= bl
->owner
;
8620 struct watchpoint
*w
= (struct watchpoint
*) b
;
8622 /* Continuable hardware watchpoints are treated as non-existent if the
8623 reason we stopped wasn't a hardware watchpoint (we didn't stop on
8624 some data address). Otherwise gdb won't stop on a break instruction
8625 in the code (not from a breakpoint) when a hardware watchpoint has
8626 been defined. Also skip watchpoints which we know did not trigger
8627 (did not match the data address). */
8628 if (is_hardware_watchpoint (b
)
8629 && w
->watchpoint_triggered
== watch_triggered_no
)
8636 check_status_watchpoint (bpstat bs
)
8638 gdb_assert (is_watchpoint (bs
->breakpoint_at
));
8640 bpstat_check_watchpoint (bs
);
8643 /* Implement the "resources_needed" breakpoint_ops method for
8644 hardware watchpoints. */
8647 resources_needed_watchpoint (const struct bp_location
*bl
)
8649 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8650 int length
= w
->exact
? 1 : bl
->length
;
8652 return target_region_ok_for_hw_watchpoint (bl
->address
, length
);
8655 /* Implement the "works_in_software_mode" breakpoint_ops method for
8656 hardware watchpoints. */
8659 works_in_software_mode_watchpoint (const struct breakpoint
*b
)
8661 /* Read and access watchpoints only work with hardware support. */
8662 return b
->type
== bp_watchpoint
|| b
->type
== bp_hardware_watchpoint
;
8665 static enum print_stop_action
8666 print_it_watchpoint (bpstat bs
)
8668 struct cleanup
*old_chain
;
8669 struct breakpoint
*b
;
8670 const struct bp_location
*bl
;
8671 struct ui_stream
*stb
;
8672 enum print_stop_action result
;
8673 struct watchpoint
*w
;
8674 struct ui_out
*uiout
= current_uiout
;
8676 gdb_assert (bs
->bp_location_at
!= NULL
);
8678 bl
= bs
->bp_location_at
;
8679 b
= bs
->breakpoint_at
;
8680 w
= (struct watchpoint
*) b
;
8682 stb
= ui_out_stream_new (uiout
);
8683 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
8688 case bp_hardware_watchpoint
:
8689 annotate_watchpoint (b
->number
);
8690 if (ui_out_is_mi_like_p (uiout
))
8693 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
8695 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
8696 ui_out_text (uiout
, "\nOld value = ");
8697 watchpoint_value_print (bs
->old_val
, stb
->stream
);
8698 ui_out_field_stream (uiout
, "old", stb
);
8699 ui_out_text (uiout
, "\nNew value = ");
8700 watchpoint_value_print (w
->val
, stb
->stream
);
8701 ui_out_field_stream (uiout
, "new", stb
);
8702 ui_out_text (uiout
, "\n");
8703 /* More than one watchpoint may have been triggered. */
8704 result
= PRINT_UNKNOWN
;
8707 case bp_read_watchpoint
:
8708 if (ui_out_is_mi_like_p (uiout
))
8711 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
8713 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
8714 ui_out_text (uiout
, "\nValue = ");
8715 watchpoint_value_print (w
->val
, stb
->stream
);
8716 ui_out_field_stream (uiout
, "value", stb
);
8717 ui_out_text (uiout
, "\n");
8718 result
= PRINT_UNKNOWN
;
8721 case bp_access_watchpoint
:
8722 if (bs
->old_val
!= NULL
)
8724 annotate_watchpoint (b
->number
);
8725 if (ui_out_is_mi_like_p (uiout
))
8728 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
8730 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
8731 ui_out_text (uiout
, "\nOld value = ");
8732 watchpoint_value_print (bs
->old_val
, stb
->stream
);
8733 ui_out_field_stream (uiout
, "old", stb
);
8734 ui_out_text (uiout
, "\nNew value = ");
8739 if (ui_out_is_mi_like_p (uiout
))
8742 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
8743 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
8744 ui_out_text (uiout
, "\nValue = ");
8746 watchpoint_value_print (w
->val
, stb
->stream
);
8747 ui_out_field_stream (uiout
, "new", stb
);
8748 ui_out_text (uiout
, "\n");
8749 result
= PRINT_UNKNOWN
;
8752 result
= PRINT_UNKNOWN
;
8755 do_cleanups (old_chain
);
8759 /* Implement the "print_mention" breakpoint_ops method for hardware
8763 print_mention_watchpoint (struct breakpoint
*b
)
8765 struct cleanup
*ui_out_chain
;
8766 struct watchpoint
*w
= (struct watchpoint
*) b
;
8767 struct ui_out
*uiout
= current_uiout
;
8772 ui_out_text (uiout
, "Watchpoint ");
8773 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
8775 case bp_hardware_watchpoint
:
8776 ui_out_text (uiout
, "Hardware watchpoint ");
8777 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
8779 case bp_read_watchpoint
:
8780 ui_out_text (uiout
, "Hardware read watchpoint ");
8781 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
8783 case bp_access_watchpoint
:
8784 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
8785 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
8788 internal_error (__FILE__
, __LINE__
,
8789 _("Invalid hardware watchpoint type."));
8792 ui_out_field_int (uiout
, "number", b
->number
);
8793 ui_out_text (uiout
, ": ");
8794 ui_out_field_string (uiout
, "exp", w
->exp_string
);
8795 do_cleanups (ui_out_chain
);
8798 /* Implement the "print_recreate" breakpoint_ops method for
8802 print_recreate_watchpoint (struct breakpoint
*b
, struct ui_file
*fp
)
8804 struct watchpoint
*w
= (struct watchpoint
*) b
;
8809 case bp_hardware_watchpoint
:
8810 fprintf_unfiltered (fp
, "watch");
8812 case bp_read_watchpoint
:
8813 fprintf_unfiltered (fp
, "rwatch");
8815 case bp_access_watchpoint
:
8816 fprintf_unfiltered (fp
, "awatch");
8819 internal_error (__FILE__
, __LINE__
,
8820 _("Invalid watchpoint type."));
8823 fprintf_unfiltered (fp
, " %s", w
->exp_string
);
8824 print_recreate_thread (b
, fp
);
8827 /* The breakpoint_ops structure to be used in hardware watchpoints. */
8829 static struct breakpoint_ops watchpoint_breakpoint_ops
;
8831 /* Implement the "insert" breakpoint_ops method for
8832 masked hardware watchpoints. */
8835 insert_masked_watchpoint (struct bp_location
*bl
)
8837 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8839 return target_insert_mask_watchpoint (bl
->address
, w
->hw_wp_mask
,
8840 bl
->watchpoint_type
);
8843 /* Implement the "remove" breakpoint_ops method for
8844 masked hardware watchpoints. */
8847 remove_masked_watchpoint (struct bp_location
*bl
)
8849 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8851 return target_remove_mask_watchpoint (bl
->address
, w
->hw_wp_mask
,
8852 bl
->watchpoint_type
);
8855 /* Implement the "resources_needed" breakpoint_ops method for
8856 masked hardware watchpoints. */
8859 resources_needed_masked_watchpoint (const struct bp_location
*bl
)
8861 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8863 return target_masked_watch_num_registers (bl
->address
, w
->hw_wp_mask
);
8866 /* Implement the "works_in_software_mode" breakpoint_ops method for
8867 masked hardware watchpoints. */
8870 works_in_software_mode_masked_watchpoint (const struct breakpoint
*b
)
8875 /* Implement the "print_it" breakpoint_ops method for
8876 masked hardware watchpoints. */
8878 static enum print_stop_action
8879 print_it_masked_watchpoint (bpstat bs
)
8881 struct breakpoint
*b
= bs
->breakpoint_at
;
8882 struct ui_out
*uiout
= current_uiout
;
8884 /* Masked watchpoints have only one location. */
8885 gdb_assert (b
->loc
&& b
->loc
->next
== NULL
);
8889 case bp_hardware_watchpoint
:
8890 annotate_watchpoint (b
->number
);
8891 if (ui_out_is_mi_like_p (uiout
))
8894 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
8897 case bp_read_watchpoint
:
8898 if (ui_out_is_mi_like_p (uiout
))
8901 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
8904 case bp_access_watchpoint
:
8905 if (ui_out_is_mi_like_p (uiout
))
8908 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
8911 internal_error (__FILE__
, __LINE__
,
8912 _("Invalid hardware watchpoint type."));
8916 ui_out_text (uiout
, _("\n\
8917 Check the underlying instruction at PC for the memory\n\
8918 address and value which triggered this watchpoint.\n"));
8919 ui_out_text (uiout
, "\n");
8921 /* More than one watchpoint may have been triggered. */
8922 return PRINT_UNKNOWN
;
8925 /* Implement the "print_one_detail" breakpoint_ops method for
8926 masked hardware watchpoints. */
8929 print_one_detail_masked_watchpoint (const struct breakpoint
*b
,
8930 struct ui_out
*uiout
)
8932 struct watchpoint
*w
= (struct watchpoint
*) b
;
8934 /* Masked watchpoints have only one location. */
8935 gdb_assert (b
->loc
&& b
->loc
->next
== NULL
);
8937 ui_out_text (uiout
, "\tmask ");
8938 ui_out_field_core_addr (uiout
, "mask", b
->loc
->gdbarch
, w
->hw_wp_mask
);
8939 ui_out_text (uiout
, "\n");
8942 /* Implement the "print_mention" breakpoint_ops method for
8943 masked hardware watchpoints. */
8946 print_mention_masked_watchpoint (struct breakpoint
*b
)
8948 struct watchpoint
*w
= (struct watchpoint
*) b
;
8949 struct ui_out
*uiout
= current_uiout
;
8950 struct cleanup
*ui_out_chain
;
8954 case bp_hardware_watchpoint
:
8955 ui_out_text (uiout
, "Masked hardware watchpoint ");
8956 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
8958 case bp_read_watchpoint
:
8959 ui_out_text (uiout
, "Masked hardware read watchpoint ");
8960 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
8962 case bp_access_watchpoint
:
8963 ui_out_text (uiout
, "Masked hardware access (read/write) watchpoint ");
8964 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
8967 internal_error (__FILE__
, __LINE__
,
8968 _("Invalid hardware watchpoint type."));
8971 ui_out_field_int (uiout
, "number", b
->number
);
8972 ui_out_text (uiout
, ": ");
8973 ui_out_field_string (uiout
, "exp", w
->exp_string
);
8974 do_cleanups (ui_out_chain
);
8977 /* Implement the "print_recreate" breakpoint_ops method for
8978 masked hardware watchpoints. */
8981 print_recreate_masked_watchpoint (struct breakpoint
*b
, struct ui_file
*fp
)
8983 struct watchpoint
*w
= (struct watchpoint
*) b
;
8988 case bp_hardware_watchpoint
:
8989 fprintf_unfiltered (fp
, "watch");
8991 case bp_read_watchpoint
:
8992 fprintf_unfiltered (fp
, "rwatch");
8994 case bp_access_watchpoint
:
8995 fprintf_unfiltered (fp
, "awatch");
8998 internal_error (__FILE__
, __LINE__
,
8999 _("Invalid hardware watchpoint type."));
9002 sprintf_vma (tmp
, w
->hw_wp_mask
);
9003 fprintf_unfiltered (fp
, " %s mask 0x%s", w
->exp_string
, tmp
);
9004 print_recreate_thread (b
, fp
);
9007 /* The breakpoint_ops structure to be used in masked hardware watchpoints. */
9009 static struct breakpoint_ops masked_watchpoint_breakpoint_ops
;
9011 /* Tell whether the given watchpoint is a masked hardware watchpoint. */
9014 is_masked_watchpoint (const struct breakpoint
*b
)
9016 return b
->ops
== &masked_watchpoint_breakpoint_ops
;
9019 /* accessflag: hw_write: watch write,
9020 hw_read: watch read,
9021 hw_access: watch access (read or write) */
9023 watch_command_1 (char *arg
, int accessflag
, int from_tty
,
9024 int just_location
, int internal
)
9026 volatile struct gdb_exception e
;
9027 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
9028 struct expression
*exp
;
9029 struct block
*exp_valid_block
= NULL
, *cond_exp_valid_block
= NULL
;
9030 struct value
*val
, *mark
, *result
;
9031 struct frame_info
*frame
;
9032 char *exp_start
= NULL
;
9033 char *exp_end
= NULL
;
9034 char *tok
, *end_tok
;
9036 char *cond_start
= NULL
;
9037 char *cond_end
= NULL
;
9038 enum bptype bp_type
;
9041 /* Flag to indicate whether we are going to use masks for
9042 the hardware watchpoint. */
9045 struct watchpoint
*w
;
9047 /* Make sure that we actually have parameters to parse. */
9048 if (arg
!= NULL
&& arg
[0] != '\0')
9052 /* Look for "parameter value" pairs at the end
9053 of the arguments string. */
9054 for (tok
= arg
+ strlen (arg
) - 1; tok
> arg
; tok
--)
9056 /* Skip whitespace at the end of the argument list. */
9057 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
9060 /* Find the beginning of the last token.
9061 This is the value of the parameter. */
9062 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
9064 value_start
= tok
+ 1;
9066 /* Skip whitespace. */
9067 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
9072 /* Find the beginning of the second to last token.
9073 This is the parameter itself. */
9074 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
9077 toklen
= end_tok
- tok
+ 1;
9079 if (toklen
== 6 && !strncmp (tok
, "thread", 6))
9081 /* At this point we've found a "thread" token, which means
9082 the user is trying to set a watchpoint that triggers
9083 only in a specific thread. */
9087 error(_("You can specify only one thread."));
9089 /* Extract the thread ID from the next token. */
9090 thread
= strtol (value_start
, &endp
, 0);
9092 /* Check if the user provided a valid numeric value for the
9094 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
9095 error (_("Invalid thread ID specification %s."), value_start
);
9097 /* Check if the thread actually exists. */
9098 if (!valid_thread_id (thread
))
9099 error (_("Unknown thread %d."), thread
);
9101 else if (toklen
== 4 && !strncmp (tok
, "mask", 4))
9103 /* We've found a "mask" token, which means the user wants to
9104 create a hardware watchpoint that is going to have the mask
9106 struct value
*mask_value
, *mark
;
9109 error(_("You can specify only one mask."));
9111 use_mask
= just_location
= 1;
9113 mark
= value_mark ();
9114 mask_value
= parse_to_comma_and_eval (&value_start
);
9115 mask
= value_as_address (mask_value
);
9116 value_free_to_mark (mark
);
9119 /* We didn't recognize what we found. We should stop here. */
9122 /* Truncate the string and get rid of the "parameter value" pair before
9123 the arguments string is parsed by the parse_exp_1 function. */
9128 /* Parse the rest of the arguments. */
9129 innermost_block
= NULL
;
9131 exp
= parse_exp_1 (&arg
, 0, 0);
9133 /* Remove trailing whitespace from the expression before saving it.
9134 This makes the eventual display of the expression string a bit
9136 while (exp_end
> exp_start
&& (exp_end
[-1] == ' ' || exp_end
[-1] == '\t'))
9139 /* Checking if the expression is not constant. */
9140 if (watchpoint_exp_is_const (exp
))
9144 len
= exp_end
- exp_start
;
9145 while (len
> 0 && isspace (exp_start
[len
- 1]))
9147 error (_("Cannot watch constant value `%.*s'."), len
, exp_start
);
9150 exp_valid_block
= innermost_block
;
9151 mark
= value_mark ();
9152 fetch_subexp_value (exp
, &pc
, &val
, &result
, NULL
);
9158 exp_valid_block
= NULL
;
9159 val
= value_addr (result
);
9160 release_value (val
);
9161 value_free_to_mark (mark
);
9165 ret
= target_masked_watch_num_registers (value_as_address (val
),
9168 error (_("This target does not support masked watchpoints."));
9170 error (_("Invalid mask or memory region."));
9173 else if (val
!= NULL
)
9174 release_value (val
);
9176 tok
= skip_spaces (arg
);
9177 end_tok
= skip_to_space (tok
);
9179 toklen
= end_tok
- tok
;
9180 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
9182 struct expression
*cond
;
9184 innermost_block
= NULL
;
9185 tok
= cond_start
= end_tok
+ 1;
9186 cond
= parse_exp_1 (&tok
, 0, 0);
9188 /* The watchpoint expression may not be local, but the condition
9189 may still be. E.g.: `watch global if local > 0'. */
9190 cond_exp_valid_block
= innermost_block
;
9196 error (_("Junk at end of command."));
9198 if (accessflag
== hw_read
)
9199 bp_type
= bp_read_watchpoint
;
9200 else if (accessflag
== hw_access
)
9201 bp_type
= bp_access_watchpoint
;
9203 bp_type
= bp_hardware_watchpoint
;
9205 frame
= block_innermost_frame (exp_valid_block
);
9207 /* If the expression is "local", then set up a "watchpoint scope"
9208 breakpoint at the point where we've left the scope of the watchpoint
9209 expression. Create the scope breakpoint before the watchpoint, so
9210 that we will encounter it first in bpstat_stop_status. */
9211 if (exp_valid_block
&& frame
)
9213 if (frame_id_p (frame_unwind_caller_id (frame
)))
9216 = create_internal_breakpoint (frame_unwind_caller_arch (frame
),
9217 frame_unwind_caller_pc (frame
),
9218 bp_watchpoint_scope
,
9219 &momentary_breakpoint_ops
);
9221 scope_breakpoint
->enable_state
= bp_enabled
;
9223 /* Automatically delete the breakpoint when it hits. */
9224 scope_breakpoint
->disposition
= disp_del
;
9226 /* Only break in the proper frame (help with recursion). */
9227 scope_breakpoint
->frame_id
= frame_unwind_caller_id (frame
);
9229 /* Set the address at which we will stop. */
9230 scope_breakpoint
->loc
->gdbarch
9231 = frame_unwind_caller_arch (frame
);
9232 scope_breakpoint
->loc
->requested_address
9233 = frame_unwind_caller_pc (frame
);
9234 scope_breakpoint
->loc
->address
9235 = adjust_breakpoint_address (scope_breakpoint
->loc
->gdbarch
,
9236 scope_breakpoint
->loc
->requested_address
,
9237 scope_breakpoint
->type
);
9241 /* Now set up the breakpoint. */
9243 w
= XCNEW (struct watchpoint
);
9246 init_raw_breakpoint_without_location (b
, NULL
, bp_type
,
9247 &masked_watchpoint_breakpoint_ops
);
9249 init_raw_breakpoint_without_location (b
, NULL
, bp_type
,
9250 &watchpoint_breakpoint_ops
);
9252 b
->disposition
= disp_donttouch
;
9253 b
->pspace
= current_program_space
;
9255 w
->exp_valid_block
= exp_valid_block
;
9256 w
->cond_exp_valid_block
= cond_exp_valid_block
;
9259 struct type
*t
= value_type (val
);
9260 CORE_ADDR addr
= value_as_address (val
);
9263 t
= check_typedef (TYPE_TARGET_TYPE (check_typedef (t
)));
9264 name
= type_to_string (t
);
9266 w
->exp_string_reparse
= xstrprintf ("* (%s *) %s", name
,
9267 core_addr_to_string (addr
));
9270 w
->exp_string
= xstrprintf ("-location %.*s",
9271 (int) (exp_end
- exp_start
), exp_start
);
9273 /* The above expression is in C. */
9274 b
->language
= language_c
;
9277 w
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
9281 w
->hw_wp_mask
= mask
;
9290 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
9296 w
->watchpoint_frame
= get_frame_id (frame
);
9297 w
->watchpoint_thread
= inferior_ptid
;
9301 w
->watchpoint_frame
= null_frame_id
;
9302 w
->watchpoint_thread
= null_ptid
;
9305 if (scope_breakpoint
!= NULL
)
9307 /* The scope breakpoint is related to the watchpoint. We will
9308 need to act on them together. */
9309 b
->related_breakpoint
= scope_breakpoint
;
9310 scope_breakpoint
->related_breakpoint
= b
;
9314 value_free_to_mark (mark
);
9316 TRY_CATCH (e
, RETURN_MASK_ALL
)
9318 /* Finally update the new watchpoint. This creates the locations
9319 that should be inserted. */
9320 update_watchpoint (w
, 1);
9324 delete_breakpoint (b
);
9325 throw_exception (e
);
9328 install_breakpoint (internal
, b
, 1);
9331 /* Return count of debug registers needed to watch the given expression.
9332 If the watchpoint cannot be handled in hardware return zero. */
9335 can_use_hardware_watchpoint (struct value
*v
)
9337 int found_memory_cnt
= 0;
9338 struct value
*head
= v
;
9340 /* Did the user specifically forbid us to use hardware watchpoints? */
9341 if (!can_use_hw_watchpoints
)
9344 /* Make sure that the value of the expression depends only upon
9345 memory contents, and values computed from them within GDB. If we
9346 find any register references or function calls, we can't use a
9347 hardware watchpoint.
9349 The idea here is that evaluating an expression generates a series
9350 of values, one holding the value of every subexpression. (The
9351 expression a*b+c has five subexpressions: a, b, a*b, c, and
9352 a*b+c.) GDB's values hold almost enough information to establish
9353 the criteria given above --- they identify memory lvalues,
9354 register lvalues, computed values, etcetera. So we can evaluate
9355 the expression, and then scan the chain of values that leaves
9356 behind to decide whether we can detect any possible change to the
9357 expression's final value using only hardware watchpoints.
9359 However, I don't think that the values returned by inferior
9360 function calls are special in any way. So this function may not
9361 notice that an expression involving an inferior function call
9362 can't be watched with hardware watchpoints. FIXME. */
9363 for (; v
; v
= value_next (v
))
9365 if (VALUE_LVAL (v
) == lval_memory
)
9367 if (v
!= head
&& value_lazy (v
))
9368 /* A lazy memory lvalue in the chain is one that GDB never
9369 needed to fetch; we either just used its address (e.g.,
9370 `a' in `a.b') or we never needed it at all (e.g., `a'
9371 in `a,b'). This doesn't apply to HEAD; if that is
9372 lazy then it was not readable, but watch it anyway. */
9376 /* Ahh, memory we actually used! Check if we can cover
9377 it with hardware watchpoints. */
9378 struct type
*vtype
= check_typedef (value_type (v
));
9380 /* We only watch structs and arrays if user asked for it
9381 explicitly, never if they just happen to appear in a
9382 middle of some value chain. */
9384 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
9385 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
9387 CORE_ADDR vaddr
= value_address (v
);
9391 len
= (target_exact_watchpoints
9392 && is_scalar_type_recursive (vtype
))?
9393 1 : TYPE_LENGTH (value_type (v
));
9395 num_regs
= target_region_ok_for_hw_watchpoint (vaddr
, len
);
9399 found_memory_cnt
+= num_regs
;
9403 else if (VALUE_LVAL (v
) != not_lval
9404 && deprecated_value_modifiable (v
) == 0)
9405 return 0; /* These are values from the history (e.g., $1). */
9406 else if (VALUE_LVAL (v
) == lval_register
)
9407 return 0; /* Cannot watch a register with a HW watchpoint. */
9410 /* The expression itself looks suitable for using a hardware
9411 watchpoint, but give the target machine a chance to reject it. */
9412 return found_memory_cnt
;
9416 watch_command_wrapper (char *arg
, int from_tty
, int internal
)
9418 watch_command_1 (arg
, hw_write
, from_tty
, 0, internal
);
9421 /* A helper function that looks for an argument at the start of a
9422 string. The argument must also either be at the end of the string,
9423 or be followed by whitespace. Returns 1 if it finds the argument,
9424 0 otherwise. If the argument is found, it updates *STR. */
9427 check_for_argument (char **str
, char *arg
, int arg_len
)
9429 if (strncmp (*str
, arg
, arg_len
) == 0
9430 && ((*str
)[arg_len
] == '\0' || isspace ((*str
)[arg_len
])))
9438 /* A helper function that looks for the "-location" argument and then
9439 calls watch_command_1. */
9442 watch_maybe_just_location (char *arg
, int accessflag
, int from_tty
)
9444 int just_location
= 0;
9447 && (check_for_argument (&arg
, "-location", sizeof ("-location") - 1)
9448 || check_for_argument (&arg
, "-l", sizeof ("-l") - 1)))
9450 arg
= skip_spaces (arg
);
9454 watch_command_1 (arg
, accessflag
, from_tty
, just_location
, 0);
9458 watch_command (char *arg
, int from_tty
)
9460 watch_maybe_just_location (arg
, hw_write
, from_tty
);
9464 rwatch_command_wrapper (char *arg
, int from_tty
, int internal
)
9466 watch_command_1 (arg
, hw_read
, from_tty
, 0, internal
);
9470 rwatch_command (char *arg
, int from_tty
)
9472 watch_maybe_just_location (arg
, hw_read
, from_tty
);
9476 awatch_command_wrapper (char *arg
, int from_tty
, int internal
)
9478 watch_command_1 (arg
, hw_access
, from_tty
, 0, internal
);
9482 awatch_command (char *arg
, int from_tty
)
9484 watch_maybe_just_location (arg
, hw_access
, from_tty
);
9488 /* Helper routines for the until_command routine in infcmd.c. Here
9489 because it uses the mechanisms of breakpoints. */
9491 struct until_break_command_continuation_args
9493 struct breakpoint
*breakpoint
;
9494 struct breakpoint
*breakpoint2
;
9498 /* This function is called by fetch_inferior_event via the
9499 cmd_continuation pointer, to complete the until command. It takes
9500 care of cleaning up the temporary breakpoints set up by the until
9503 until_break_command_continuation (void *arg
, int err
)
9505 struct until_break_command_continuation_args
*a
= arg
;
9507 delete_breakpoint (a
->breakpoint
);
9509 delete_breakpoint (a
->breakpoint2
);
9510 delete_longjmp_breakpoint (a
->thread_num
);
9514 until_break_command (char *arg
, int from_tty
, int anywhere
)
9516 struct symtabs_and_lines sals
;
9517 struct symtab_and_line sal
;
9518 struct frame_info
*frame
= get_selected_frame (NULL
);
9519 struct breakpoint
*breakpoint
;
9520 struct breakpoint
*breakpoint2
= NULL
;
9521 struct cleanup
*old_chain
;
9523 struct thread_info
*tp
;
9525 clear_proceed_status ();
9527 /* Set a breakpoint where the user wants it and at return from
9530 if (last_displayed_sal_is_valid ())
9531 sals
= decode_line_1 (&arg
, DECODE_LINE_FUNFIRSTLINE
,
9532 get_last_displayed_symtab (),
9533 get_last_displayed_line ());
9535 sals
= decode_line_1 (&arg
, DECODE_LINE_FUNFIRSTLINE
,
9536 (struct symtab
*) NULL
, 0);
9538 if (sals
.nelts
!= 1)
9539 error (_("Couldn't get information on specified line."));
9542 xfree (sals
.sals
); /* malloc'd, so freed. */
9545 error (_("Junk at end of arguments."));
9547 resolve_sal_pc (&sal
);
9550 /* If the user told us to continue until a specified location,
9551 we don't specify a frame at which we need to stop. */
9552 breakpoint
= set_momentary_breakpoint (get_frame_arch (frame
), sal
,
9553 null_frame_id
, bp_until
);
9555 /* Otherwise, specify the selected frame, because we want to stop
9556 only at the very same frame. */
9557 breakpoint
= set_momentary_breakpoint (get_frame_arch (frame
), sal
,
9558 get_stack_frame_id (frame
),
9561 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
9563 tp
= inferior_thread ();
9566 /* Keep within the current frame, or in frames called by the current
9569 if (frame_id_p (frame_unwind_caller_id (frame
)))
9571 sal
= find_pc_line (frame_unwind_caller_pc (frame
), 0);
9572 sal
.pc
= frame_unwind_caller_pc (frame
);
9573 breakpoint2
= set_momentary_breakpoint (frame_unwind_caller_arch (frame
),
9575 frame_unwind_caller_id (frame
),
9577 make_cleanup_delete_breakpoint (breakpoint2
);
9579 set_longjmp_breakpoint (tp
, frame_unwind_caller_id (frame
));
9580 make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
9583 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
9585 /* If we are running asynchronously, and proceed call above has
9586 actually managed to start the target, arrange for breakpoints to
9587 be deleted when the target stops. Otherwise, we're already
9588 stopped and delete breakpoints via cleanup chain. */
9590 if (target_can_async_p () && is_running (inferior_ptid
))
9592 struct until_break_command_continuation_args
*args
;
9593 args
= xmalloc (sizeof (*args
));
9595 args
->breakpoint
= breakpoint
;
9596 args
->breakpoint2
= breakpoint2
;
9597 args
->thread_num
= thread
;
9599 discard_cleanups (old_chain
);
9600 add_continuation (inferior_thread (),
9601 until_break_command_continuation
, args
,
9605 do_cleanups (old_chain
);
9608 /* This function attempts to parse an optional "if <cond>" clause
9609 from the arg string. If one is not found, it returns NULL.
9611 Else, it returns a pointer to the condition string. (It does not
9612 attempt to evaluate the string against a particular block.) And,
9613 it updates arg to point to the first character following the parsed
9614 if clause in the arg string. */
9617 ep_parse_optional_if_clause (char **arg
)
9621 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
9624 /* Skip the "if" keyword. */
9627 /* Skip any extra leading whitespace, and record the start of the
9628 condition string. */
9629 *arg
= skip_spaces (*arg
);
9632 /* Assume that the condition occupies the remainder of the arg
9634 (*arg
) += strlen (cond_string
);
9639 /* Commands to deal with catching events, such as signals, exceptions,
9640 process start/exit, etc. */
9644 catch_fork_temporary
, catch_vfork_temporary
,
9645 catch_fork_permanent
, catch_vfork_permanent
9650 catch_fork_command_1 (char *arg
, int from_tty
,
9651 struct cmd_list_element
*command
)
9653 struct gdbarch
*gdbarch
= get_current_arch ();
9654 char *cond_string
= NULL
;
9655 catch_fork_kind fork_kind
;
9658 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
9659 tempflag
= (fork_kind
== catch_fork_temporary
9660 || fork_kind
== catch_vfork_temporary
);
9664 arg
= skip_spaces (arg
);
9666 /* The allowed syntax is:
9668 catch [v]fork if <cond>
9670 First, check if there's an if clause. */
9671 cond_string
= ep_parse_optional_if_clause (&arg
);
9673 if ((*arg
!= '\0') && !isspace (*arg
))
9674 error (_("Junk at end of arguments."));
9676 /* If this target supports it, create a fork or vfork catchpoint
9677 and enable reporting of such events. */
9680 case catch_fork_temporary
:
9681 case catch_fork_permanent
:
9682 create_fork_vfork_event_catchpoint (gdbarch
, tempflag
, cond_string
,
9683 &catch_fork_breakpoint_ops
);
9685 case catch_vfork_temporary
:
9686 case catch_vfork_permanent
:
9687 create_fork_vfork_event_catchpoint (gdbarch
, tempflag
, cond_string
,
9688 &catch_vfork_breakpoint_ops
);
9691 error (_("unsupported or unknown fork kind; cannot catch it"));
9697 catch_exec_command_1 (char *arg
, int from_tty
,
9698 struct cmd_list_element
*command
)
9700 struct exec_catchpoint
*c
;
9701 struct gdbarch
*gdbarch
= get_current_arch ();
9703 char *cond_string
= NULL
;
9705 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
9709 arg
= skip_spaces (arg
);
9711 /* The allowed syntax is:
9713 catch exec if <cond>
9715 First, check if there's an if clause. */
9716 cond_string
= ep_parse_optional_if_clause (&arg
);
9718 if ((*arg
!= '\0') && !isspace (*arg
))
9719 error (_("Junk at end of arguments."));
9721 c
= XNEW (struct exec_catchpoint
);
9722 init_catchpoint (&c
->base
, gdbarch
, tempflag
, cond_string
,
9723 &catch_exec_breakpoint_ops
);
9724 c
->exec_pathname
= NULL
;
9726 install_breakpoint (0, &c
->base
, 1);
9729 static enum print_stop_action
9730 print_it_exception_catchpoint (bpstat bs
)
9732 struct ui_out
*uiout
= current_uiout
;
9733 struct breakpoint
*b
= bs
->breakpoint_at
;
9734 int bp_temp
, bp_throw
;
9736 annotate_catchpoint (b
->number
);
9738 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
9739 if (b
->loc
->address
!= b
->loc
->requested_address
)
9740 breakpoint_adjustment_warning (b
->loc
->requested_address
,
9743 bp_temp
= b
->disposition
== disp_del
;
9745 bp_temp
? "Temporary catchpoint "
9747 if (!ui_out_is_mi_like_p (uiout
))
9748 ui_out_field_int (uiout
, "bkptno", b
->number
);
9750 bp_throw
? " (exception thrown), "
9751 : " (exception caught), ");
9752 if (ui_out_is_mi_like_p (uiout
))
9754 ui_out_field_string (uiout
, "reason",
9755 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
9756 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
9757 ui_out_field_int (uiout
, "bkptno", b
->number
);
9759 return PRINT_SRC_AND_LOC
;
9763 print_one_exception_catchpoint (struct breakpoint
*b
,
9764 struct bp_location
**last_loc
)
9766 struct value_print_options opts
;
9767 struct ui_out
*uiout
= current_uiout
;
9769 get_user_print_options (&opts
);
9770 if (opts
.addressprint
)
9773 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
9774 ui_out_field_string (uiout
, "addr", "<PENDING>");
9776 ui_out_field_core_addr (uiout
, "addr",
9777 b
->loc
->gdbarch
, b
->loc
->address
);
9782 if (strstr (b
->addr_string
, "throw") != NULL
)
9783 ui_out_field_string (uiout
, "what", "exception throw");
9785 ui_out_field_string (uiout
, "what", "exception catch");
9789 print_mention_exception_catchpoint (struct breakpoint
*b
)
9791 struct ui_out
*uiout
= current_uiout
;
9795 bp_temp
= b
->disposition
== disp_del
;
9796 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
9797 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
9798 : _("Catchpoint "));
9799 ui_out_field_int (uiout
, "bkptno", b
->number
);
9800 ui_out_text (uiout
, bp_throw
? _(" (throw)")
9804 /* Implement the "print_recreate" breakpoint_ops method for throw and
9805 catch catchpoints. */
9808 print_recreate_exception_catchpoint (struct breakpoint
*b
,
9814 bp_temp
= b
->disposition
== disp_del
;
9815 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
9816 fprintf_unfiltered (fp
, bp_temp
? "tcatch " : "catch ");
9817 fprintf_unfiltered (fp
, bp_throw
? "throw" : "catch");
9818 print_recreate_thread (b
, fp
);
9821 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
;
9824 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
9825 enum exception_event_kind ex_event
, int from_tty
)
9827 char *trigger_func_name
;
9829 if (ex_event
== EX_EVENT_CATCH
)
9830 trigger_func_name
= "__cxa_begin_catch";
9832 trigger_func_name
= "__cxa_throw";
9834 create_breakpoint (get_current_arch (),
9835 trigger_func_name
, cond_string
, -1,
9836 0 /* condition and thread are valid. */,
9837 tempflag
, bp_breakpoint
,
9839 AUTO_BOOLEAN_TRUE
/* pending */,
9840 &gnu_v3_exception_catchpoint_ops
, from_tty
,
9847 /* Deal with "catch catch" and "catch throw" commands. */
9850 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
9851 int tempflag
, int from_tty
)
9853 char *cond_string
= NULL
;
9857 arg
= skip_spaces (arg
);
9859 cond_string
= ep_parse_optional_if_clause (&arg
);
9861 if ((*arg
!= '\0') && !isspace (*arg
))
9862 error (_("Junk at end of arguments."));
9864 if (ex_event
!= EX_EVENT_THROW
9865 && ex_event
!= EX_EVENT_CATCH
)
9866 error (_("Unsupported or unknown exception event; cannot catch it"));
9868 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
9871 warning (_("Unsupported with this platform/compiler combination."));
9874 /* Implementation of "catch catch" command. */
9877 catch_catch_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
9879 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
9881 catch_exception_command_1 (EX_EVENT_CATCH
, arg
, tempflag
, from_tty
);
9884 /* Implementation of "catch throw" command. */
9887 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
9889 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
9891 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
9895 init_ada_exception_breakpoint (struct breakpoint
*b
,
9896 struct gdbarch
*gdbarch
,
9897 struct symtab_and_line sal
,
9899 const struct breakpoint_ops
*ops
,
9905 struct gdbarch
*loc_gdbarch
= get_sal_arch (sal
);
9907 loc_gdbarch
= gdbarch
;
9909 describe_other_breakpoints (loc_gdbarch
,
9910 sal
.pspace
, sal
.pc
, sal
.section
, -1);
9911 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
9912 version for exception catchpoints, because two catchpoints
9913 used for different exception names will use the same address.
9914 In this case, a "breakpoint ... also set at..." warning is
9915 unproductive. Besides, the warning phrasing is also a bit
9916 inappropriate, we should use the word catchpoint, and tell
9917 the user what type of catchpoint it is. The above is good
9918 enough for now, though. */
9921 init_raw_breakpoint (b
, gdbarch
, sal
, bp_breakpoint
, ops
);
9923 b
->enable_state
= bp_enabled
;
9924 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
9925 b
->addr_string
= addr_string
;
9926 b
->language
= language_ada
;
9929 /* Splits the argument using space as delimiter. Returns an xmalloc'd
9930 filter list, or NULL if no filtering is required. */
9932 catch_syscall_split_args (char *arg
)
9934 VEC(int) *result
= NULL
;
9935 struct cleanup
*cleanup
= make_cleanup (VEC_cleanup (int), &result
);
9937 while (*arg
!= '\0')
9939 int i
, syscall_number
;
9944 /* Skip whitespace. */
9945 while (isspace (*arg
))
9948 for (i
= 0; i
< 127 && arg
[i
] && !isspace (arg
[i
]); ++i
)
9949 cur_name
[i
] = arg
[i
];
9953 /* Check if the user provided a syscall name or a number. */
9954 syscall_number
= (int) strtol (cur_name
, &endptr
, 0);
9955 if (*endptr
== '\0')
9956 get_syscall_by_number (syscall_number
, &s
);
9959 /* We have a name. Let's check if it's valid and convert it
9961 get_syscall_by_name (cur_name
, &s
);
9963 if (s
.number
== UNKNOWN_SYSCALL
)
9964 /* Here we have to issue an error instead of a warning,
9965 because GDB cannot do anything useful if there's no
9966 syscall number to be caught. */
9967 error (_("Unknown syscall name '%s'."), cur_name
);
9970 /* Ok, it's valid. */
9971 VEC_safe_push (int, result
, s
.number
);
9974 discard_cleanups (cleanup
);
9978 /* Implement the "catch syscall" command. */
9981 catch_syscall_command_1 (char *arg
, int from_tty
,
9982 struct cmd_list_element
*command
)
9987 struct gdbarch
*gdbarch
= get_current_arch ();
9989 /* Checking if the feature if supported. */
9990 if (gdbarch_get_syscall_number_p (gdbarch
) == 0)
9991 error (_("The feature 'catch syscall' is not supported on \
9992 this architecture yet."));
9994 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
9996 arg
= skip_spaces (arg
);
9998 /* We need to do this first "dummy" translation in order
9999 to get the syscall XML file loaded or, most important,
10000 to display a warning to the user if there's no XML file
10001 for his/her architecture. */
10002 get_syscall_by_number (0, &s
);
10004 /* The allowed syntax is:
10006 catch syscall <name | number> [<name | number> ... <name | number>]
10008 Let's check if there's a syscall name. */
10011 filter
= catch_syscall_split_args (arg
);
10015 create_syscall_event_catchpoint (tempflag
, filter
,
10016 &catch_syscall_breakpoint_ops
);
10020 catch_command (char *arg
, int from_tty
)
10022 error (_("Catch requires an event name."));
10027 tcatch_command (char *arg
, int from_tty
)
10029 error (_("Catch requires an event name."));
10032 /* A qsort comparison function that sorts breakpoints in order. */
10035 compare_breakpoints (const void *a
, const void *b
)
10037 const breakpoint_p
*ba
= a
;
10038 uintptr_t ua
= (uintptr_t) *ba
;
10039 const breakpoint_p
*bb
= b
;
10040 uintptr_t ub
= (uintptr_t) *bb
;
10042 if ((*ba
)->number
< (*bb
)->number
)
10044 else if ((*ba
)->number
> (*bb
)->number
)
10047 /* Now sort by address, in case we see, e..g, two breakpoints with
10051 return ub
> ub
? 1 : 0;
10054 /* Delete breakpoints by address or line. */
10057 clear_command (char *arg
, int from_tty
)
10059 struct breakpoint
*b
, *prev
;
10060 VEC(breakpoint_p
) *found
= 0;
10063 struct symtabs_and_lines sals
;
10064 struct symtab_and_line sal
;
10066 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
10070 sals
= decode_line_spec (arg
, (DECODE_LINE_FUNFIRSTLINE
10071 | DECODE_LINE_LIST_MODE
));
10076 sals
.sals
= (struct symtab_and_line
*)
10077 xmalloc (sizeof (struct symtab_and_line
));
10078 make_cleanup (xfree
, sals
.sals
);
10079 init_sal (&sal
); /* Initialize to zeroes. */
10081 /* Set sal's line, symtab, pc, and pspace to the values
10082 corresponding to the last call to print_frame_info. If the
10083 codepoint is not valid, this will set all the fields to 0. */
10084 get_last_displayed_sal (&sal
);
10085 if (sal
.symtab
== 0)
10086 error (_("No source file specified."));
10088 sals
.sals
[0] = sal
;
10094 /* We don't call resolve_sal_pc here. That's not as bad as it
10095 seems, because all existing breakpoints typically have both
10096 file/line and pc set. So, if clear is given file/line, we can
10097 match this to existing breakpoint without obtaining pc at all.
10099 We only support clearing given the address explicitly
10100 present in breakpoint table. Say, we've set breakpoint
10101 at file:line. There were several PC values for that file:line,
10102 due to optimization, all in one block.
10104 We've picked one PC value. If "clear" is issued with another
10105 PC corresponding to the same file:line, the breakpoint won't
10106 be cleared. We probably can still clear the breakpoint, but
10107 since the other PC value is never presented to user, user
10108 can only find it by guessing, and it does not seem important
10109 to support that. */
10111 /* For each line spec given, delete bps which correspond to it. Do
10112 it in two passes, solely to preserve the current behavior that
10113 from_tty is forced true if we delete more than one
10117 make_cleanup (VEC_cleanup (breakpoint_p
), &found
);
10118 for (i
= 0; i
< sals
.nelts
; i
++)
10120 /* If exact pc given, clear bpts at that pc.
10121 If line given (pc == 0), clear all bpts on specified line.
10122 If defaulting, clear all bpts on default line
10125 defaulting sal.pc != 0 tests to do
10130 1 0 <can't happen> */
10132 sal
= sals
.sals
[i
];
10134 /* Find all matching breakpoints and add them to 'found'. */
10135 ALL_BREAKPOINTS (b
)
10138 /* Are we going to delete b? */
10139 if (b
->type
!= bp_none
&& !is_watchpoint (b
))
10141 struct bp_location
*loc
= b
->loc
;
10142 for (; loc
; loc
= loc
->next
)
10144 /* If the user specified file:line, don't allow a PC
10145 match. This matches historical gdb behavior. */
10146 int pc_match
= (!sal
.explicit_line
10148 && (loc
->pspace
== sal
.pspace
)
10149 && (loc
->address
== sal
.pc
)
10150 && (!section_is_overlay (loc
->section
)
10151 || loc
->section
== sal
.section
));
10152 int line_match
= ((default_match
|| sal
.explicit_line
)
10153 && loc
->source_file
!= NULL
10154 && sal
.symtab
!= NULL
10155 && sal
.pspace
== loc
->pspace
10156 && filename_cmp (loc
->source_file
,
10157 sal
.symtab
->filename
) == 0
10158 && loc
->line_number
== sal
.line
);
10159 if (pc_match
|| line_match
)
10168 VEC_safe_push(breakpoint_p
, found
, b
);
10172 /* Now go thru the 'found' chain and delete them. */
10173 if (VEC_empty(breakpoint_p
, found
))
10176 error (_("No breakpoint at %s."), arg
);
10178 error (_("No breakpoint at this line."));
10181 /* Remove duplicates from the vec. */
10182 qsort (VEC_address (breakpoint_p
, found
),
10183 VEC_length (breakpoint_p
, found
),
10184 sizeof (breakpoint_p
),
10185 compare_breakpoints
);
10186 prev
= VEC_index (breakpoint_p
, found
, 0);
10187 for (ix
= 1; VEC_iterate (breakpoint_p
, found
, ix
, b
); ++ix
)
10191 VEC_ordered_remove (breakpoint_p
, found
, ix
);
10196 if (VEC_length(breakpoint_p
, found
) > 1)
10197 from_tty
= 1; /* Always report if deleted more than one. */
10200 if (VEC_length(breakpoint_p
, found
) == 1)
10201 printf_unfiltered (_("Deleted breakpoint "));
10203 printf_unfiltered (_("Deleted breakpoints "));
10205 breakpoints_changed ();
10207 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
10210 printf_unfiltered ("%d ", b
->number
);
10211 delete_breakpoint (b
);
10214 putchar_unfiltered ('\n');
10216 do_cleanups (cleanups
);
10219 /* Delete breakpoint in BS if they are `delete' breakpoints and
10220 all breakpoints that are marked for deletion, whether hit or not.
10221 This is called after any breakpoint is hit, or after errors. */
10224 breakpoint_auto_delete (bpstat bs
)
10226 struct breakpoint
*b
, *b_tmp
;
10228 for (; bs
; bs
= bs
->next
)
10229 if (bs
->breakpoint_at
10230 && bs
->breakpoint_at
->disposition
== disp_del
10232 delete_breakpoint (bs
->breakpoint_at
);
10234 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
10236 if (b
->disposition
== disp_del_at_next_stop
)
10237 delete_breakpoint (b
);
10241 /* A comparison function for bp_location AP and BP being interfaced to
10242 qsort. Sort elements primarily by their ADDRESS (no matter what
10243 does breakpoint_address_is_meaningful say for its OWNER),
10244 secondarily by ordering first bp_permanent OWNERed elements and
10245 terciarily just ensuring the array is sorted stable way despite
10246 qsort being an unstable algorithm. */
10249 bp_location_compare (const void *ap
, const void *bp
)
10251 struct bp_location
*a
= *(void **) ap
;
10252 struct bp_location
*b
= *(void **) bp
;
10253 /* A and B come from existing breakpoints having non-NULL OWNER. */
10254 int a_perm
= a
->owner
->enable_state
== bp_permanent
;
10255 int b_perm
= b
->owner
->enable_state
== bp_permanent
;
10257 if (a
->address
!= b
->address
)
10258 return (a
->address
> b
->address
) - (a
->address
< b
->address
);
10260 /* Sort permanent breakpoints first. */
10261 if (a_perm
!= b_perm
)
10262 return (a_perm
< b_perm
) - (a_perm
> b_perm
);
10264 /* Make the user-visible order stable across GDB runs. Locations of
10265 the same breakpoint can be sorted in arbitrary order. */
10267 if (a
->owner
->number
!= b
->owner
->number
)
10268 return (a
->owner
->number
> b
->owner
->number
)
10269 - (a
->owner
->number
< b
->owner
->number
);
10271 return (a
> b
) - (a
< b
);
10274 /* Set bp_location_placed_address_before_address_max and
10275 bp_location_shadow_len_after_address_max according to the current
10276 content of the bp_location array. */
10279 bp_location_target_extensions_update (void)
10281 struct bp_location
*bl
, **blp_tmp
;
10283 bp_location_placed_address_before_address_max
= 0;
10284 bp_location_shadow_len_after_address_max
= 0;
10286 ALL_BP_LOCATIONS (bl
, blp_tmp
)
10288 CORE_ADDR start
, end
, addr
;
10290 if (!bp_location_has_shadow (bl
))
10293 start
= bl
->target_info
.placed_address
;
10294 end
= start
+ bl
->target_info
.shadow_len
;
10296 gdb_assert (bl
->address
>= start
);
10297 addr
= bl
->address
- start
;
10298 if (addr
> bp_location_placed_address_before_address_max
)
10299 bp_location_placed_address_before_address_max
= addr
;
10301 /* Zero SHADOW_LEN would not pass bp_location_has_shadow. */
10303 gdb_assert (bl
->address
< end
);
10304 addr
= end
- bl
->address
;
10305 if (addr
> bp_location_shadow_len_after_address_max
)
10306 bp_location_shadow_len_after_address_max
= addr
;
10310 /* Download tracepoint locations if they haven't been. */
10313 download_tracepoint_locations (void)
10315 struct bp_location
*bl
, **blp_tmp
;
10316 struct cleanup
*old_chain
;
10318 if (!target_can_download_tracepoint ())
10321 old_chain
= save_current_space_and_thread ();
10323 ALL_BP_LOCATIONS (bl
, blp_tmp
)
10325 struct tracepoint
*t
;
10327 if (!is_tracepoint (bl
->owner
))
10330 if ((bl
->owner
->type
== bp_fast_tracepoint
10331 ? !may_insert_fast_tracepoints
10332 : !may_insert_tracepoints
))
10335 /* In tracepoint, locations are _never_ duplicated, so
10336 should_be_inserted is equivalent to
10337 unduplicated_should_be_inserted. */
10338 if (!should_be_inserted (bl
) || bl
->inserted
)
10341 switch_to_program_space_and_thread (bl
->pspace
);
10343 target_download_tracepoint (bl
);
10346 t
= (struct tracepoint
*) bl
->owner
;
10347 t
->number_on_target
= bl
->owner
->number
;
10350 do_cleanups (old_chain
);
10353 /* Swap the insertion/duplication state between two locations. */
10356 swap_insertion (struct bp_location
*left
, struct bp_location
*right
)
10358 const int left_inserted
= left
->inserted
;
10359 const int left_duplicate
= left
->duplicate
;
10360 const struct bp_target_info left_target_info
= left
->target_info
;
10362 /* Locations of tracepoints can never be duplicated. */
10363 if (is_tracepoint (left
->owner
))
10364 gdb_assert (!left
->duplicate
);
10365 if (is_tracepoint (right
->owner
))
10366 gdb_assert (!right
->duplicate
);
10368 left
->inserted
= right
->inserted
;
10369 left
->duplicate
= right
->duplicate
;
10370 left
->target_info
= right
->target_info
;
10371 right
->inserted
= left_inserted
;
10372 right
->duplicate
= left_duplicate
;
10373 right
->target_info
= left_target_info
;
10376 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
10377 into the inferior, only remove already-inserted locations that no
10378 longer should be inserted. Functions that delete a breakpoint or
10379 breakpoints should pass false, so that deleting a breakpoint
10380 doesn't have the side effect of inserting the locations of other
10381 breakpoints that are marked not-inserted, but should_be_inserted
10382 returns true on them.
10384 This behaviour is useful is situations close to tear-down -- e.g.,
10385 after an exec, while the target still has execution, but breakpoint
10386 shadows of the previous executable image should *NOT* be restored
10387 to the new image; or before detaching, where the target still has
10388 execution and wants to delete breakpoints from GDB's lists, and all
10389 breakpoints had already been removed from the inferior. */
10392 update_global_location_list (int should_insert
)
10394 struct breakpoint
*b
;
10395 struct bp_location
**locp
, *loc
;
10396 struct cleanup
*cleanups
;
10398 /* Used in the duplicates detection below. When iterating over all
10399 bp_locations, points to the first bp_location of a given address.
10400 Breakpoints and watchpoints of different types are never
10401 duplicates of each other. Keep one pointer for each type of
10402 breakpoint/watchpoint, so we only need to loop over all locations
10404 struct bp_location
*bp_loc_first
; /* breakpoint */
10405 struct bp_location
*wp_loc_first
; /* hardware watchpoint */
10406 struct bp_location
*awp_loc_first
; /* access watchpoint */
10407 struct bp_location
*rwp_loc_first
; /* read watchpoint */
10409 /* Saved former bp_location array which we compare against the newly
10410 built bp_location from the current state of ALL_BREAKPOINTS. */
10411 struct bp_location
**old_location
, **old_locp
;
10412 unsigned old_location_count
;
10414 old_location
= bp_location
;
10415 old_location_count
= bp_location_count
;
10416 bp_location
= NULL
;
10417 bp_location_count
= 0;
10418 cleanups
= make_cleanup (xfree
, old_location
);
10420 ALL_BREAKPOINTS (b
)
10421 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
10422 bp_location_count
++;
10424 bp_location
= xmalloc (sizeof (*bp_location
) * bp_location_count
);
10425 locp
= bp_location
;
10426 ALL_BREAKPOINTS (b
)
10427 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
10429 qsort (bp_location
, bp_location_count
, sizeof (*bp_location
),
10430 bp_location_compare
);
10432 bp_location_target_extensions_update ();
10434 /* Identify bp_location instances that are no longer present in the
10435 new list, and therefore should be freed. Note that it's not
10436 necessary that those locations should be removed from inferior --
10437 if there's another location at the same address (previously
10438 marked as duplicate), we don't need to remove/insert the
10441 LOCP is kept in sync with OLD_LOCP, each pointing to the current
10442 and former bp_location array state respectively. */
10444 locp
= bp_location
;
10445 for (old_locp
= old_location
; old_locp
< old_location
+ old_location_count
;
10448 struct bp_location
*old_loc
= *old_locp
;
10449 struct bp_location
**loc2p
;
10451 /* Tells if 'old_loc' is found among the new locations. If
10452 not, we have to free it. */
10453 int found_object
= 0;
10454 /* Tells if the location should remain inserted in the target. */
10455 int keep_in_target
= 0;
10458 /* Skip LOCP entries which will definitely never be needed.
10459 Stop either at or being the one matching OLD_LOC. */
10460 while (locp
< bp_location
+ bp_location_count
10461 && (*locp
)->address
< old_loc
->address
)
10465 (loc2p
< bp_location
+ bp_location_count
10466 && (*loc2p
)->address
== old_loc
->address
);
10469 if (*loc2p
== old_loc
)
10476 /* If this location is no longer present, and inserted, look if
10477 there's maybe a new location at the same address. If so,
10478 mark that one inserted, and don't remove this one. This is
10479 needed so that we don't have a time window where a breakpoint
10480 at certain location is not inserted. */
10482 if (old_loc
->inserted
)
10484 /* If the location is inserted now, we might have to remove
10487 if (found_object
&& should_be_inserted (old_loc
))
10489 /* The location is still present in the location list,
10490 and still should be inserted. Don't do anything. */
10491 keep_in_target
= 1;
10495 /* The location is either no longer present, or got
10496 disabled. See if there's another location at the
10497 same address, in which case we don't need to remove
10498 this one from the target. */
10500 /* OLD_LOC comes from existing struct breakpoint. */
10501 if (breakpoint_address_is_meaningful (old_loc
->owner
))
10504 (loc2p
< bp_location
+ bp_location_count
10505 && (*loc2p
)->address
== old_loc
->address
);
10508 struct bp_location
*loc2
= *loc2p
;
10510 if (breakpoint_locations_match (loc2
, old_loc
))
10512 /* Read watchpoint locations are switched to
10513 access watchpoints, if the former are not
10514 supported, but the latter are. */
10515 if (is_hardware_watchpoint (old_loc
->owner
))
10517 gdb_assert (is_hardware_watchpoint (loc2
->owner
));
10518 loc2
->watchpoint_type
= old_loc
->watchpoint_type
;
10521 /* loc2 is a duplicated location. We need to check
10522 if it should be inserted in case it will be
10524 if (loc2
!= old_loc
10525 && unduplicated_should_be_inserted (loc2
))
10527 swap_insertion (old_loc
, loc2
);
10528 keep_in_target
= 1;
10536 if (!keep_in_target
)
10538 if (remove_breakpoint (old_loc
, mark_uninserted
))
10540 /* This is just about all we can do. We could keep
10541 this location on the global list, and try to
10542 remove it next time, but there's no particular
10543 reason why we will succeed next time.
10545 Note that at this point, old_loc->owner is still
10546 valid, as delete_breakpoint frees the breakpoint
10547 only after calling us. */
10548 printf_filtered (_("warning: Error removing "
10549 "breakpoint %d\n"),
10550 old_loc
->owner
->number
);
10558 if (removed
&& non_stop
10559 && breakpoint_address_is_meaningful (old_loc
->owner
)
10560 && !is_hardware_watchpoint (old_loc
->owner
))
10562 /* This location was removed from the target. In
10563 non-stop mode, a race condition is possible where
10564 we've removed a breakpoint, but stop events for that
10565 breakpoint are already queued and will arrive later.
10566 We apply an heuristic to be able to distinguish such
10567 SIGTRAPs from other random SIGTRAPs: we keep this
10568 breakpoint location for a bit, and will retire it
10569 after we see some number of events. The theory here
10570 is that reporting of events should, "on the average",
10571 be fair, so after a while we'll see events from all
10572 threads that have anything of interest, and no longer
10573 need to keep this breakpoint location around. We
10574 don't hold locations forever so to reduce chances of
10575 mistaking a non-breakpoint SIGTRAP for a breakpoint
10578 The heuristic failing can be disastrous on
10579 decr_pc_after_break targets.
10581 On decr_pc_after_break targets, like e.g., x86-linux,
10582 if we fail to recognize a late breakpoint SIGTRAP,
10583 because events_till_retirement has reached 0 too
10584 soon, we'll fail to do the PC adjustment, and report
10585 a random SIGTRAP to the user. When the user resumes
10586 the inferior, it will most likely immediately crash
10587 with SIGILL/SIGBUS/SIGSEGV, or worse, get silently
10588 corrupted, because of being resumed e.g., in the
10589 middle of a multi-byte instruction, or skipped a
10590 one-byte instruction. This was actually seen happen
10591 on native x86-linux, and should be less rare on
10592 targets that do not support new thread events, like
10593 remote, due to the heuristic depending on
10596 Mistaking a random SIGTRAP for a breakpoint trap
10597 causes similar symptoms (PC adjustment applied when
10598 it shouldn't), but then again, playing with SIGTRAPs
10599 behind the debugger's back is asking for trouble.
10601 Since hardware watchpoint traps are always
10602 distinguishable from other traps, so we don't need to
10603 apply keep hardware watchpoint moribund locations
10604 around. We simply always ignore hardware watchpoint
10605 traps we can no longer explain. */
10607 old_loc
->events_till_retirement
= 3 * (thread_count () + 1);
10608 old_loc
->owner
= NULL
;
10610 VEC_safe_push (bp_location_p
, moribund_locations
, old_loc
);
10614 old_loc
->owner
= NULL
;
10615 decref_bp_location (&old_loc
);
10620 /* Rescan breakpoints at the same address and section, marking the
10621 first one as "first" and any others as "duplicates". This is so
10622 that the bpt instruction is only inserted once. If we have a
10623 permanent breakpoint at the same place as BPT, make that one the
10624 official one, and the rest as duplicates. Permanent breakpoints
10625 are sorted first for the same address.
10627 Do the same for hardware watchpoints, but also considering the
10628 watchpoint's type (regular/access/read) and length. */
10630 bp_loc_first
= NULL
;
10631 wp_loc_first
= NULL
;
10632 awp_loc_first
= NULL
;
10633 rwp_loc_first
= NULL
;
10634 ALL_BP_LOCATIONS (loc
, locp
)
10636 /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always
10638 struct bp_location
**loc_first_p
;
10641 if (!should_be_inserted (loc
)
10642 || !breakpoint_address_is_meaningful (b
)
10643 /* Don't detect duplicate for tracepoint locations because they are
10644 never duplicated. See the comments in field `duplicate' of
10645 `struct bp_location'. */
10646 || is_tracepoint (b
))
10649 /* Permanent breakpoint should always be inserted. */
10650 if (b
->enable_state
== bp_permanent
&& ! loc
->inserted
)
10651 internal_error (__FILE__
, __LINE__
,
10652 _("allegedly permanent breakpoint is not "
10653 "actually inserted"));
10655 if (b
->type
== bp_hardware_watchpoint
)
10656 loc_first_p
= &wp_loc_first
;
10657 else if (b
->type
== bp_read_watchpoint
)
10658 loc_first_p
= &rwp_loc_first
;
10659 else if (b
->type
== bp_access_watchpoint
)
10660 loc_first_p
= &awp_loc_first
;
10662 loc_first_p
= &bp_loc_first
;
10664 if (*loc_first_p
== NULL
10665 || (overlay_debugging
&& loc
->section
!= (*loc_first_p
)->section
)
10666 || !breakpoint_locations_match (loc
, *loc_first_p
))
10668 *loc_first_p
= loc
;
10669 loc
->duplicate
= 0;
10674 /* This and the above ensure the invariant that the first location
10675 is not duplicated, and is the inserted one.
10676 All following are marked as duplicated, and are not inserted. */
10678 swap_insertion (loc
, *loc_first_p
);
10679 loc
->duplicate
= 1;
10681 if ((*loc_first_p
)->owner
->enable_state
== bp_permanent
&& loc
->inserted
10682 && b
->enable_state
!= bp_permanent
)
10683 internal_error (__FILE__
, __LINE__
,
10684 _("another breakpoint was inserted on top of "
10685 "a permanent breakpoint"));
10688 if (breakpoints_always_inserted_mode () && should_insert
10689 && (have_live_inferiors ()
10690 || (gdbarch_has_global_breakpoints (target_gdbarch
))))
10691 insert_breakpoint_locations ();
10694 download_tracepoint_locations ();
10696 do_cleanups (cleanups
);
10700 breakpoint_retire_moribund (void)
10702 struct bp_location
*loc
;
10705 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
10706 if (--(loc
->events_till_retirement
) == 0)
10708 decref_bp_location (&loc
);
10709 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
10715 update_global_location_list_nothrow (int inserting
)
10717 struct gdb_exception e
;
10719 TRY_CATCH (e
, RETURN_MASK_ERROR
)
10720 update_global_location_list (inserting
);
10723 /* Clear BKP from a BPS. */
10726 bpstat_remove_bp_location (bpstat bps
, struct breakpoint
*bpt
)
10730 for (bs
= bps
; bs
; bs
= bs
->next
)
10731 if (bs
->breakpoint_at
== bpt
)
10733 bs
->breakpoint_at
= NULL
;
10734 bs
->old_val
= NULL
;
10735 /* bs->commands will be freed later. */
10739 /* Callback for iterate_over_threads. */
10741 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
10743 struct breakpoint
*bpt
= data
;
10745 bpstat_remove_bp_location (th
->control
.stop_bpstat
, bpt
);
10749 /* Helper for breakpoint and tracepoint breakpoint_ops->mention
10753 say_where (struct breakpoint
*b
)
10755 struct ui_out
*uiout
= current_uiout
;
10756 struct value_print_options opts
;
10758 get_user_print_options (&opts
);
10760 /* i18n: cagney/2005-02-11: Below needs to be merged into a
10762 if (b
->loc
== NULL
)
10764 printf_filtered (_(" (%s) pending."), b
->addr_string
);
10768 if (opts
.addressprint
|| b
->loc
->source_file
== NULL
)
10770 printf_filtered (" at ");
10771 fputs_filtered (paddress (b
->loc
->gdbarch
, b
->loc
->address
),
10774 if (b
->loc
->source_file
)
10776 /* If there is a single location, we can print the location
10778 if (b
->loc
->next
== NULL
)
10779 printf_filtered (": file %s, line %d.",
10780 b
->loc
->source_file
, b
->loc
->line_number
);
10782 /* This is not ideal, but each location may have a
10783 different file name, and this at least reflects the
10784 real situation somewhat. */
10785 printf_filtered (": %s.", b
->addr_string
);
10790 struct bp_location
*loc
= b
->loc
;
10792 for (; loc
; loc
= loc
->next
)
10794 printf_filtered (" (%d locations)", n
);
10799 /* Default bp_location_ops methods. */
10802 bp_location_dtor (struct bp_location
*self
)
10804 xfree (self
->cond
);
10805 xfree (self
->function_name
);
10806 xfree (self
->source_file
);
10809 static const struct bp_location_ops bp_location_ops
=
10814 /* Default breakpoint_ops methods all breakpoint_ops ultimately
10818 base_breakpoint_dtor (struct breakpoint
*self
)
10820 decref_counted_command_line (&self
->commands
);
10821 xfree (self
->cond_string
);
10822 xfree (self
->addr_string
);
10823 xfree (self
->filter
);
10824 xfree (self
->addr_string_range_end
);
10827 static struct bp_location
*
10828 base_breakpoint_allocate_location (struct breakpoint
*self
)
10830 struct bp_location
*loc
;
10832 loc
= XNEW (struct bp_location
);
10833 init_bp_location (loc
, &bp_location_ops
, self
);
10838 base_breakpoint_re_set (struct breakpoint
*b
)
10840 /* Nothing to re-set. */
10843 #define internal_error_pure_virtual_called() \
10844 gdb_assert_not_reached ("pure virtual function called")
10847 base_breakpoint_insert_location (struct bp_location
*bl
)
10849 internal_error_pure_virtual_called ();
10853 base_breakpoint_remove_location (struct bp_location
*bl
)
10855 internal_error_pure_virtual_called ();
10859 base_breakpoint_breakpoint_hit (const struct bp_location
*bl
,
10860 struct address_space
*aspace
,
10863 internal_error_pure_virtual_called ();
10867 base_breakpoint_check_status (bpstat bs
)
10872 /* A "works_in_software_mode" breakpoint_ops method that just internal
10876 base_breakpoint_works_in_software_mode (const struct breakpoint
*b
)
10878 internal_error_pure_virtual_called ();
10881 /* A "resources_needed" breakpoint_ops method that just internal
10885 base_breakpoint_resources_needed (const struct bp_location
*bl
)
10887 internal_error_pure_virtual_called ();
10890 static enum print_stop_action
10891 base_breakpoint_print_it (bpstat bs
)
10893 internal_error_pure_virtual_called ();
10897 base_breakpoint_print_one_detail (const struct breakpoint
*self
,
10898 struct ui_out
*uiout
)
10904 base_breakpoint_print_mention (struct breakpoint
*b
)
10906 internal_error_pure_virtual_called ();
10910 base_breakpoint_print_recreate (struct breakpoint
*b
, struct ui_file
*fp
)
10912 internal_error_pure_virtual_called ();
10915 static struct breakpoint_ops base_breakpoint_ops
=
10917 base_breakpoint_dtor
,
10918 base_breakpoint_allocate_location
,
10919 base_breakpoint_re_set
,
10920 base_breakpoint_insert_location
,
10921 base_breakpoint_remove_location
,
10922 base_breakpoint_breakpoint_hit
,
10923 base_breakpoint_check_status
,
10924 base_breakpoint_resources_needed
,
10925 base_breakpoint_works_in_software_mode
,
10926 base_breakpoint_print_it
,
10928 base_breakpoint_print_one_detail
,
10929 base_breakpoint_print_mention
,
10930 base_breakpoint_print_recreate
10933 /* Default breakpoint_ops methods. */
10936 bkpt_re_set (struct breakpoint
*b
)
10938 /* FIXME: is this still reachable? */
10939 if (b
->addr_string
== NULL
)
10941 /* Anything without a string can't be re-set. */
10942 delete_breakpoint (b
);
10946 breakpoint_re_set_default (b
);
10950 bkpt_insert_location (struct bp_location
*bl
)
10952 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
10953 return target_insert_hw_breakpoint (bl
->gdbarch
,
10956 return target_insert_breakpoint (bl
->gdbarch
,
10961 bkpt_remove_location (struct bp_location
*bl
)
10963 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
10964 return target_remove_hw_breakpoint (bl
->gdbarch
, &bl
->target_info
);
10966 return target_remove_breakpoint (bl
->gdbarch
, &bl
->target_info
);
10970 bkpt_breakpoint_hit (const struct bp_location
*bl
,
10971 struct address_space
*aspace
, CORE_ADDR bp_addr
)
10973 struct breakpoint
*b
= bl
->owner
;
10975 if (!breakpoint_address_match (bl
->pspace
->aspace
, bl
->address
,
10979 if (overlay_debugging
/* unmapped overlay section */
10980 && section_is_overlay (bl
->section
)
10981 && !section_is_mapped (bl
->section
))
10988 bkpt_resources_needed (const struct bp_location
*bl
)
10990 gdb_assert (bl
->owner
->type
== bp_hardware_breakpoint
);
10995 static enum print_stop_action
10996 bkpt_print_it (bpstat bs
)
10998 struct breakpoint
*b
;
10999 const struct bp_location
*bl
;
11001 struct ui_out
*uiout
= current_uiout
;
11003 gdb_assert (bs
->bp_location_at
!= NULL
);
11005 bl
= bs
->bp_location_at
;
11006 b
= bs
->breakpoint_at
;
11008 bp_temp
= b
->disposition
== disp_del
;
11009 if (bl
->address
!= bl
->requested_address
)
11010 breakpoint_adjustment_warning (bl
->requested_address
,
11013 annotate_breakpoint (b
->number
);
11015 ui_out_text (uiout
, "\nTemporary breakpoint ");
11017 ui_out_text (uiout
, "\nBreakpoint ");
11018 if (ui_out_is_mi_like_p (uiout
))
11020 ui_out_field_string (uiout
, "reason",
11021 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
11022 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
11024 ui_out_field_int (uiout
, "bkptno", b
->number
);
11025 ui_out_text (uiout
, ", ");
11027 return PRINT_SRC_AND_LOC
;
11031 bkpt_print_mention (struct breakpoint
*b
)
11033 if (ui_out_is_mi_like_p (current_uiout
))
11038 case bp_breakpoint
:
11039 case bp_gnu_ifunc_resolver
:
11040 if (b
->disposition
== disp_del
)
11041 printf_filtered (_("Temporary breakpoint"));
11043 printf_filtered (_("Breakpoint"));
11044 printf_filtered (_(" %d"), b
->number
);
11045 if (b
->type
== bp_gnu_ifunc_resolver
)
11046 printf_filtered (_(" at gnu-indirect-function resolver"));
11048 case bp_hardware_breakpoint
:
11049 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
11057 bkpt_print_recreate (struct breakpoint
*tp
, struct ui_file
*fp
)
11059 if (tp
->type
== bp_breakpoint
&& tp
->disposition
== disp_del
)
11060 fprintf_unfiltered (fp
, "tbreak");
11061 else if (tp
->type
== bp_breakpoint
)
11062 fprintf_unfiltered (fp
, "break");
11063 else if (tp
->type
== bp_hardware_breakpoint
11064 && tp
->disposition
== disp_del
)
11065 fprintf_unfiltered (fp
, "thbreak");
11066 else if (tp
->type
== bp_hardware_breakpoint
)
11067 fprintf_unfiltered (fp
, "hbreak");
11069 internal_error (__FILE__
, __LINE__
,
11070 _("unhandled breakpoint type %d"), (int) tp
->type
);
11072 fprintf_unfiltered (fp
, " %s", tp
->addr_string
);
11073 print_recreate_thread (tp
, fp
);
11076 /* Virtual table for internal breakpoints. */
11079 internal_bkpt_re_set (struct breakpoint
*b
)
11083 /* Delete overlay event and longjmp master breakpoints; they
11084 will be reset later by breakpoint_re_set. */
11085 case bp_overlay_event
:
11086 case bp_longjmp_master
:
11087 case bp_std_terminate_master
:
11088 case bp_exception_master
:
11089 delete_breakpoint (b
);
11092 /* This breakpoint is special, it's set up when the inferior
11093 starts and we really don't want to touch it. */
11094 case bp_shlib_event
:
11096 /* Like bp_shlib_event, this breakpoint type is special. Once
11097 it is set up, we do not want to touch it. */
11098 case bp_thread_event
:
11104 internal_bkpt_check_status (bpstat bs
)
11106 /* We do not stop for these. */
11110 static enum print_stop_action
11111 internal_bkpt_print_it (bpstat bs
)
11113 struct ui_out
*uiout
= current_uiout
;
11114 struct breakpoint
*b
;
11116 b
= bs
->breakpoint_at
;
11120 case bp_shlib_event
:
11121 /* Did we stop because the user set the stop_on_solib_events
11122 variable? (If so, we report this as a generic, "Stopped due
11123 to shlib event" message.) */
11124 ui_out_text (uiout
, _("Stopped due to shared library event\n"));
11125 if (ui_out_is_mi_like_p (uiout
))
11126 ui_out_field_string (uiout
, "reason",
11127 async_reason_lookup (EXEC_ASYNC_SOLIB_EVENT
));
11130 case bp_thread_event
:
11131 /* Not sure how we will get here.
11132 GDB should not stop for these breakpoints. */
11133 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
11136 case bp_overlay_event
:
11137 /* By analogy with the thread event, GDB should not stop for these. */
11138 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
11141 case bp_longjmp_master
:
11142 /* These should never be enabled. */
11143 printf_filtered (_("Longjmp Master Breakpoint: gdb should not stop!\n"));
11146 case bp_std_terminate_master
:
11147 /* These should never be enabled. */
11148 printf_filtered (_("std::terminate Master Breakpoint: "
11149 "gdb should not stop!\n"));
11152 case bp_exception_master
:
11153 /* These should never be enabled. */
11154 printf_filtered (_("Exception Master Breakpoint: "
11155 "gdb should not stop!\n"));
11159 return PRINT_NOTHING
;
11163 internal_bkpt_print_mention (struct breakpoint
*b
)
11165 /* Nothing to mention. These breakpoints are internal. */
11168 /* Virtual table for momentary breakpoints */
11171 momentary_bkpt_re_set (struct breakpoint
*b
)
11173 /* Keep temporary breakpoints, which can be encountered when we step
11174 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
11175 Otherwise these should have been blown away via the cleanup chain
11176 or by breakpoint_init_inferior when we rerun the executable. */
11180 momentary_bkpt_check_status (bpstat bs
)
11182 /* Nothing. The point of these breakpoints is causing a stop. */
11185 static enum print_stop_action
11186 momentary_bkpt_print_it (bpstat bs
)
11188 struct ui_out
*uiout
= current_uiout
;
11190 if (ui_out_is_mi_like_p (uiout
))
11192 struct breakpoint
*b
= bs
->breakpoint_at
;
11197 ui_out_field_string
11199 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
11203 ui_out_field_string
11205 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
11210 return PRINT_UNKNOWN
;
11214 momentary_bkpt_print_mention (struct breakpoint
*b
)
11216 /* Nothing to mention. These breakpoints are internal. */
11219 /* The breakpoint_ops structure to be used in tracepoints. */
11222 tracepoint_re_set (struct breakpoint
*b
)
11224 breakpoint_re_set_default (b
);
11228 tracepoint_breakpoint_hit (const struct bp_location
*bl
,
11229 struct address_space
*aspace
, CORE_ADDR bp_addr
)
11231 /* By definition, the inferior does not report stops at
11237 tracepoint_print_one_detail (const struct breakpoint
*self
,
11238 struct ui_out
*uiout
)
11240 struct tracepoint
*tp
= (struct tracepoint
*) self
;
11241 if (tp
->static_trace_marker_id
)
11243 gdb_assert (self
->type
== bp_static_tracepoint
);
11245 ui_out_text (uiout
, "\tmarker id is ");
11246 ui_out_field_string (uiout
, "static-tracepoint-marker-string-id",
11247 tp
->static_trace_marker_id
);
11248 ui_out_text (uiout
, "\n");
11253 tracepoint_print_mention (struct breakpoint
*b
)
11255 if (ui_out_is_mi_like_p (current_uiout
))
11260 case bp_tracepoint
:
11261 printf_filtered (_("Tracepoint"));
11262 printf_filtered (_(" %d"), b
->number
);
11264 case bp_fast_tracepoint
:
11265 printf_filtered (_("Fast tracepoint"));
11266 printf_filtered (_(" %d"), b
->number
);
11268 case bp_static_tracepoint
:
11269 printf_filtered (_("Static tracepoint"));
11270 printf_filtered (_(" %d"), b
->number
);
11273 internal_error (__FILE__
, __LINE__
,
11274 _("unhandled tracepoint type %d"), (int) b
->type
);
11281 tracepoint_print_recreate (struct breakpoint
*self
, struct ui_file
*fp
)
11283 struct tracepoint
*tp
= (struct tracepoint
*) self
;
11285 if (self
->type
== bp_fast_tracepoint
)
11286 fprintf_unfiltered (fp
, "ftrace");
11287 if (self
->type
== bp_static_tracepoint
)
11288 fprintf_unfiltered (fp
, "strace");
11289 else if (self
->type
== bp_tracepoint
)
11290 fprintf_unfiltered (fp
, "trace");
11292 internal_error (__FILE__
, __LINE__
,
11293 _("unhandled tracepoint type %d"), (int) self
->type
);
11295 fprintf_unfiltered (fp
, " %s", self
->addr_string
);
11296 print_recreate_thread (self
, fp
);
11298 if (tp
->pass_count
)
11299 fprintf_unfiltered (fp
, " passcount %d\n", tp
->pass_count
);
11302 struct breakpoint_ops tracepoint_breakpoint_ops
;
11304 /* Delete a breakpoint and clean up all traces of it in the data
11308 delete_breakpoint (struct breakpoint
*bpt
)
11310 struct breakpoint
*b
;
11312 gdb_assert (bpt
!= NULL
);
11314 /* Has this bp already been deleted? This can happen because
11315 multiple lists can hold pointers to bp's. bpstat lists are
11318 One example of this happening is a watchpoint's scope bp. When
11319 the scope bp triggers, we notice that the watchpoint is out of
11320 scope, and delete it. We also delete its scope bp. But the
11321 scope bp is marked "auto-deleting", and is already on a bpstat.
11322 That bpstat is then checked for auto-deleting bp's, which are
11325 A real solution to this problem might involve reference counts in
11326 bp's, and/or giving them pointers back to their referencing
11327 bpstat's, and teaching delete_breakpoint to only free a bp's
11328 storage when no more references were extent. A cheaper bandaid
11330 if (bpt
->type
== bp_none
)
11333 /* At least avoid this stale reference until the reference counting
11334 of breakpoints gets resolved. */
11335 if (bpt
->related_breakpoint
!= bpt
)
11337 struct breakpoint
*related
;
11338 struct watchpoint
*w
;
11340 if (bpt
->type
== bp_watchpoint_scope
)
11341 w
= (struct watchpoint
*) bpt
->related_breakpoint
;
11342 else if (bpt
->related_breakpoint
->type
== bp_watchpoint_scope
)
11343 w
= (struct watchpoint
*) bpt
;
11347 watchpoint_del_at_next_stop (w
);
11349 /* Unlink bpt from the bpt->related_breakpoint ring. */
11350 for (related
= bpt
; related
->related_breakpoint
!= bpt
;
11351 related
= related
->related_breakpoint
);
11352 related
->related_breakpoint
= bpt
->related_breakpoint
;
11353 bpt
->related_breakpoint
= bpt
;
11356 /* watch_command_1 creates a watchpoint but only sets its number if
11357 update_watchpoint succeeds in creating its bp_locations. If there's
11358 a problem in that process, we'll be asked to delete the half-created
11359 watchpoint. In that case, don't announce the deletion. */
11361 observer_notify_breakpoint_deleted (bpt
);
11363 if (breakpoint_chain
== bpt
)
11364 breakpoint_chain
= bpt
->next
;
11366 ALL_BREAKPOINTS (b
)
11367 if (b
->next
== bpt
)
11369 b
->next
= bpt
->next
;
11373 /* Be sure no bpstat's are pointing at the breakpoint after it's
11375 /* FIXME, how can we find all bpstat's? We just check stop_bpstat
11376 in all threads for now. Note that we cannot just remove bpstats
11377 pointing at bpt from the stop_bpstat list entirely, as breakpoint
11378 commands are associated with the bpstat; if we remove it here,
11379 then the later call to bpstat_do_actions (&stop_bpstat); in
11380 event-top.c won't do anything, and temporary breakpoints with
11381 commands won't work. */
11383 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
11385 /* Now that breakpoint is removed from breakpoint list, update the
11386 global location list. This will remove locations that used to
11387 belong to this breakpoint. Do this before freeing the breakpoint
11388 itself, since remove_breakpoint looks at location's owner. It
11389 might be better design to have location completely
11390 self-contained, but it's not the case now. */
11391 update_global_location_list (0);
11393 bpt
->ops
->dtor (bpt
);
11394 /* On the chance that someone will soon try again to delete this
11395 same bp, we mark it as deleted before freeing its storage. */
11396 bpt
->type
= bp_none
;
11401 do_delete_breakpoint_cleanup (void *b
)
11403 delete_breakpoint (b
);
11407 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
11409 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
11412 /* Iterator function to call a user-provided callback function once
11413 for each of B and its related breakpoints. */
11416 iterate_over_related_breakpoints (struct breakpoint
*b
,
11417 void (*function
) (struct breakpoint
*,
11421 struct breakpoint
*related
;
11426 struct breakpoint
*next
;
11428 /* FUNCTION may delete RELATED. */
11429 next
= related
->related_breakpoint
;
11431 if (next
== related
)
11433 /* RELATED is the last ring entry. */
11434 function (related
, data
);
11436 /* FUNCTION may have deleted it, so we'd never reach back to
11437 B. There's nothing left to do anyway, so just break
11442 function (related
, data
);
11446 while (related
!= b
);
11450 do_delete_breakpoint (struct breakpoint
*b
, void *ignore
)
11452 delete_breakpoint (b
);
11455 /* A callback for map_breakpoint_numbers that calls
11456 delete_breakpoint. */
11459 do_map_delete_breakpoint (struct breakpoint
*b
, void *ignore
)
11461 iterate_over_related_breakpoints (b
, do_delete_breakpoint
, NULL
);
11465 delete_command (char *arg
, int from_tty
)
11467 struct breakpoint
*b
, *b_tmp
;
11473 int breaks_to_delete
= 0;
11475 /* Delete all breakpoints if no argument. Do not delete
11476 internal breakpoints, these have to be deleted with an
11477 explicit breakpoint number argument. */
11478 ALL_BREAKPOINTS (b
)
11479 if (user_breakpoint_p (b
))
11481 breaks_to_delete
= 1;
11485 /* Ask user only if there are some breakpoints to delete. */
11487 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
11489 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
11490 if (user_breakpoint_p (b
))
11491 delete_breakpoint (b
);
11495 map_breakpoint_numbers (arg
, do_map_delete_breakpoint
, NULL
);
11499 all_locations_are_pending (struct bp_location
*loc
)
11501 for (; loc
; loc
= loc
->next
)
11502 if (!loc
->shlib_disabled
)
11507 /* Subroutine of update_breakpoint_locations to simplify it.
11508 Return non-zero if multiple fns in list LOC have the same name.
11509 Null names are ignored. */
11512 ambiguous_names_p (struct bp_location
*loc
)
11514 struct bp_location
*l
;
11515 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
11516 (int (*) (const void *,
11517 const void *)) streq
,
11518 NULL
, xcalloc
, xfree
);
11520 for (l
= loc
; l
!= NULL
; l
= l
->next
)
11523 const char *name
= l
->function_name
;
11525 /* Allow for some names to be NULL, ignore them. */
11529 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
11531 /* NOTE: We can assume slot != NULL here because xcalloc never
11535 htab_delete (htab
);
11541 htab_delete (htab
);
11545 /* When symbols change, it probably means the sources changed as well,
11546 and it might mean the static tracepoint markers are no longer at
11547 the same address or line numbers they used to be at last we
11548 checked. Losing your static tracepoints whenever you rebuild is
11549 undesirable. This function tries to resync/rematch gdb static
11550 tracepoints with the markers on the target, for static tracepoints
11551 that have not been set by marker id. Static tracepoint that have
11552 been set by marker id are reset by marker id in breakpoint_re_set.
11555 1) For a tracepoint set at a specific address, look for a marker at
11556 the old PC. If one is found there, assume to be the same marker.
11557 If the name / string id of the marker found is different from the
11558 previous known name, assume that means the user renamed the marker
11559 in the sources, and output a warning.
11561 2) For a tracepoint set at a given line number, look for a marker
11562 at the new address of the old line number. If one is found there,
11563 assume to be the same marker. If the name / string id of the
11564 marker found is different from the previous known name, assume that
11565 means the user renamed the marker in the sources, and output a
11568 3) If a marker is no longer found at the same address or line, it
11569 may mean the marker no longer exists. But it may also just mean
11570 the code changed a bit. Maybe the user added a few lines of code
11571 that made the marker move up or down (in line number terms). Ask
11572 the target for info about the marker with the string id as we knew
11573 it. If found, update line number and address in the matching
11574 static tracepoint. This will get confused if there's more than one
11575 marker with the same ID (possible in UST, although unadvised
11576 precisely because it confuses tools). */
11578 static struct symtab_and_line
11579 update_static_tracepoint (struct breakpoint
*b
, struct symtab_and_line sal
)
11581 struct tracepoint
*tp
= (struct tracepoint
*) b
;
11582 struct static_tracepoint_marker marker
;
11588 find_line_pc (sal
.symtab
, sal
.line
, &pc
);
11590 if (target_static_tracepoint_marker_at (pc
, &marker
))
11592 if (strcmp (tp
->static_trace_marker_id
, marker
.str_id
) != 0)
11593 warning (_("static tracepoint %d changed probed marker from %s to %s"),
11595 tp
->static_trace_marker_id
, marker
.str_id
);
11597 xfree (tp
->static_trace_marker_id
);
11598 tp
->static_trace_marker_id
= xstrdup (marker
.str_id
);
11599 release_static_tracepoint_marker (&marker
);
11604 /* Old marker wasn't found on target at lineno. Try looking it up
11606 if (!sal
.explicit_pc
11608 && sal
.symtab
!= NULL
11609 && tp
->static_trace_marker_id
!= NULL
)
11611 VEC(static_tracepoint_marker_p
) *markers
;
11614 = target_static_tracepoint_markers_by_strid (tp
->static_trace_marker_id
);
11616 if (!VEC_empty(static_tracepoint_marker_p
, markers
))
11618 struct symtab_and_line sal2
;
11619 struct symbol
*sym
;
11620 struct static_tracepoint_marker
*tpmarker
;
11621 struct ui_out
*uiout
= current_uiout
;
11623 tpmarker
= VEC_index (static_tracepoint_marker_p
, markers
, 0);
11625 xfree (tp
->static_trace_marker_id
);
11626 tp
->static_trace_marker_id
= xstrdup (tpmarker
->str_id
);
11628 warning (_("marker for static tracepoint %d (%s) not "
11629 "found at previous line number"),
11630 b
->number
, tp
->static_trace_marker_id
);
11634 sal2
.pc
= tpmarker
->address
;
11636 sal2
= find_pc_line (tpmarker
->address
, 0);
11637 sym
= find_pc_sect_function (tpmarker
->address
, NULL
);
11638 ui_out_text (uiout
, "Now in ");
11641 ui_out_field_string (uiout
, "func",
11642 SYMBOL_PRINT_NAME (sym
));
11643 ui_out_text (uiout
, " at ");
11645 ui_out_field_string (uiout
, "file", sal2
.symtab
->filename
);
11646 ui_out_text (uiout
, ":");
11648 if (ui_out_is_mi_like_p (uiout
))
11650 char *fullname
= symtab_to_fullname (sal2
.symtab
);
11653 ui_out_field_string (uiout
, "fullname", fullname
);
11656 ui_out_field_int (uiout
, "line", sal2
.line
);
11657 ui_out_text (uiout
, "\n");
11659 b
->loc
->line_number
= sal2
.line
;
11661 xfree (b
->loc
->source_file
);
11663 b
->loc
->source_file
= xstrdup (sal2
.symtab
->filename
);
11665 b
->loc
->source_file
= NULL
;
11667 xfree (b
->addr_string
);
11668 b
->addr_string
= xstrprintf ("%s:%d",
11669 sal2
.symtab
->filename
,
11670 b
->loc
->line_number
);
11672 /* Might be nice to check if function changed, and warn if
11675 release_static_tracepoint_marker (tpmarker
);
11681 /* Returns 1 iff locations A and B are sufficiently same that
11682 we don't need to report breakpoint as changed. */
11685 locations_are_equal (struct bp_location
*a
, struct bp_location
*b
)
11689 if (a
->address
!= b
->address
)
11692 if (a
->shlib_disabled
!= b
->shlib_disabled
)
11695 if (a
->enabled
!= b
->enabled
)
11702 if ((a
== NULL
) != (b
== NULL
))
11708 /* Create new breakpoint locations for B (a hardware or software breakpoint)
11709 based on SALS and SALS_END. If SALS_END.NELTS is not zero, then B is
11710 a ranged breakpoint. */
11713 update_breakpoint_locations (struct breakpoint
*b
,
11714 struct symtabs_and_lines sals
,
11715 struct symtabs_and_lines sals_end
)
11718 struct bp_location
*existing_locations
= b
->loc
;
11720 if (sals_end
.nelts
!= 0 && (sals
.nelts
!= 1 || sals_end
.nelts
!= 1))
11722 /* Ranged breakpoints have only one start location and one end
11724 b
->enable_state
= bp_disabled
;
11725 update_global_location_list (1);
11726 printf_unfiltered (_("Could not reset ranged breakpoint %d: "
11727 "multiple locations found\n"),
11732 /* If there's no new locations, and all existing locations are
11733 pending, don't do anything. This optimizes the common case where
11734 all locations are in the same shared library, that was unloaded.
11735 We'd like to retain the location, so that when the library is
11736 loaded again, we don't loose the enabled/disabled status of the
11737 individual locations. */
11738 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
11743 for (i
= 0; i
< sals
.nelts
; ++i
)
11745 struct bp_location
*new_loc
;
11747 switch_to_program_space_and_thread (sals
.sals
[i
].pspace
);
11749 new_loc
= add_location_to_breakpoint (b
, &(sals
.sals
[i
]));
11751 /* Reparse conditions, they might contain references to the
11753 if (b
->cond_string
!= NULL
)
11756 struct gdb_exception e
;
11758 s
= b
->cond_string
;
11759 TRY_CATCH (e
, RETURN_MASK_ERROR
)
11761 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
11766 warning (_("failed to reevaluate condition "
11767 "for breakpoint %d: %s"),
11768 b
->number
, e
.message
);
11769 new_loc
->enabled
= 0;
11773 if (sals_end
.nelts
)
11775 CORE_ADDR end
= find_breakpoint_range_end (sals_end
.sals
[0]);
11777 new_loc
->length
= end
- sals
.sals
[0].pc
+ 1;
11781 /* Update locations of permanent breakpoints. */
11782 if (b
->enable_state
== bp_permanent
)
11783 make_breakpoint_permanent (b
);
11785 /* If possible, carry over 'disable' status from existing
11788 struct bp_location
*e
= existing_locations
;
11789 /* If there are multiple breakpoints with the same function name,
11790 e.g. for inline functions, comparing function names won't work.
11791 Instead compare pc addresses; this is just a heuristic as things
11792 may have moved, but in practice it gives the correct answer
11793 often enough until a better solution is found. */
11794 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
11796 for (; e
; e
= e
->next
)
11798 if (!e
->enabled
&& e
->function_name
)
11800 struct bp_location
*l
= b
->loc
;
11801 if (have_ambiguous_names
)
11803 for (; l
; l
= l
->next
)
11804 if (breakpoint_locations_match (e
, l
))
11812 for (; l
; l
= l
->next
)
11813 if (l
->function_name
11814 && strcmp (e
->function_name
, l
->function_name
) == 0)
11824 if (!locations_are_equal (existing_locations
, b
->loc
))
11825 observer_notify_breakpoint_modified (b
);
11827 update_global_location_list (1);
11830 /* Find the SaL locations corresponding to the given ADDR_STRING.
11831 On return, FOUND will be 1 if any SaL was found, zero otherwise. */
11833 static struct symtabs_and_lines
11834 addr_string_to_sals (struct breakpoint
*b
, char *addr_string
, int *found
)
11838 struct symtabs_and_lines sals
= {0};
11839 volatile struct gdb_exception e
;
11842 marker_spec
= b
->type
== bp_static_tracepoint
&& is_marker_spec (s
);
11844 TRY_CATCH (e
, RETURN_MASK_ERROR
)
11848 struct tracepoint
*tp
= (struct tracepoint
*) b
;
11850 sals
= decode_static_tracepoint_spec (&s
);
11851 if (sals
.nelts
> tp
->static_trace_marker_id_idx
)
11853 sals
.sals
[0] = sals
.sals
[tp
->static_trace_marker_id_idx
];
11857 error (_("marker %s not found"), tp
->static_trace_marker_id
);
11861 struct linespec_result canonical
;
11863 init_linespec_result (&canonical
);
11864 decode_line_full (&s
, DECODE_LINE_FUNFIRSTLINE
,
11865 (struct symtab
*) NULL
, 0,
11866 &canonical
, multiple_symbols_all
,
11869 /* We should get 0 or 1 resulting SALs. */
11870 gdb_assert (VEC_length (linespec_sals
, canonical
.sals
) < 2);
11872 if (VEC_length (linespec_sals
, canonical
.sals
) > 0)
11874 struct linespec_sals
*lsal
;
11876 lsal
= VEC_index (linespec_sals
, canonical
.sals
, 0);
11878 /* Arrange it so the destructor does not free the
11880 lsal
->sals
.sals
= NULL
;
11883 destroy_linespec_result (&canonical
);
11888 int not_found_and_ok
= 0;
11889 /* For pending breakpoints, it's expected that parsing will
11890 fail until the right shared library is loaded. User has
11891 already told to create pending breakpoints and don't need
11892 extra messages. If breakpoint is in bp_shlib_disabled
11893 state, then user already saw the message about that
11894 breakpoint being disabled, and don't want to see more
11896 if (e
.error
== NOT_FOUND_ERROR
11897 && (b
->condition_not_parsed
11898 || (b
->loc
&& b
->loc
->shlib_disabled
)
11899 || (b
->loc
&& b
->loc
->pspace
->executing_startup
)
11900 || b
->enable_state
== bp_disabled
))
11901 not_found_and_ok
= 1;
11903 if (!not_found_and_ok
)
11905 /* We surely don't want to warn about the same breakpoint
11906 10 times. One solution, implemented here, is disable
11907 the breakpoint on error. Another solution would be to
11908 have separate 'warning emitted' flag. Since this
11909 happens only when a binary has changed, I don't know
11910 which approach is better. */
11911 b
->enable_state
= bp_disabled
;
11912 throw_exception (e
);
11916 if (e
.reason
== 0 || e
.error
!= NOT_FOUND_ERROR
)
11920 for (i
= 0; i
< sals
.nelts
; ++i
)
11921 resolve_sal_pc (&sals
.sals
[i
]);
11922 if (b
->condition_not_parsed
&& s
&& s
[0])
11924 char *cond_string
= 0;
11928 find_condition_and_thread (s
, sals
.sals
[0].pc
,
11929 &cond_string
, &thread
, &task
);
11931 b
->cond_string
= cond_string
;
11932 b
->thread
= thread
;
11934 b
->condition_not_parsed
= 0;
11937 if (b
->type
== bp_static_tracepoint
&& !marker_spec
)
11938 sals
.sals
[0] = update_static_tracepoint (b
, sals
.sals
[0]);
11948 /* The default re_set method, for typical hardware or software
11949 breakpoints. Reevaluate the breakpoint and recreate its
11953 breakpoint_re_set_default (struct breakpoint
*b
)
11956 struct symtabs_and_lines sals
, sals_end
;
11957 struct symtabs_and_lines expanded
= {0};
11958 struct symtabs_and_lines expanded_end
= {0};
11960 sals
= addr_string_to_sals (b
, b
->addr_string
, &found
);
11963 make_cleanup (xfree
, sals
.sals
);
11967 if (b
->addr_string_range_end
)
11969 sals_end
= addr_string_to_sals (b
, b
->addr_string_range_end
, &found
);
11972 make_cleanup (xfree
, sals_end
.sals
);
11973 expanded_end
= sals_end
;
11977 update_breakpoint_locations (b
, expanded
, expanded_end
);
11980 /* Prepare the global context for a re-set of breakpoint B. */
11982 static struct cleanup
*
11983 prepare_re_set_context (struct breakpoint
*b
)
11985 struct cleanup
*cleanups
;
11987 input_radix
= b
->input_radix
;
11988 cleanups
= save_current_space_and_thread ();
11989 if (b
->pspace
!= NULL
)
11990 switch_to_program_space_and_thread (b
->pspace
);
11991 set_language (b
->language
);
11996 /* Reset a breakpoint given it's struct breakpoint * BINT.
11997 The value we return ends up being the return value from catch_errors.
11998 Unused in this case. */
12001 breakpoint_re_set_one (void *bint
)
12003 /* Get past catch_errs. */
12004 struct breakpoint
*b
= (struct breakpoint
*) bint
;
12005 struct cleanup
*cleanups
;
12007 cleanups
= prepare_re_set_context (b
);
12008 b
->ops
->re_set (b
);
12009 do_cleanups (cleanups
);
12013 /* Re-set all breakpoints after symbols have been re-loaded. */
12015 breakpoint_re_set (void)
12017 struct breakpoint
*b
, *b_tmp
;
12018 enum language save_language
;
12019 int save_input_radix
;
12020 struct cleanup
*old_chain
;
12022 save_language
= current_language
->la_language
;
12023 save_input_radix
= input_radix
;
12024 old_chain
= save_current_program_space ();
12026 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
12028 /* Format possible error msg. */
12029 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
12031 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
12032 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
12033 do_cleanups (cleanups
);
12035 set_language (save_language
);
12036 input_radix
= save_input_radix
;
12038 jit_breakpoint_re_set ();
12040 do_cleanups (old_chain
);
12042 create_overlay_event_breakpoint ();
12043 create_longjmp_master_breakpoint ();
12044 create_std_terminate_master_breakpoint ();
12045 create_exception_master_breakpoint ();
12047 /* While we're at it, reset the skip list too. */
12051 /* Reset the thread number of this breakpoint:
12053 - If the breakpoint is for all threads, leave it as-is.
12054 - Else, reset it to the current thread for inferior_ptid. */
12056 breakpoint_re_set_thread (struct breakpoint
*b
)
12058 if (b
->thread
!= -1)
12060 if (in_thread_list (inferior_ptid
))
12061 b
->thread
= pid_to_thread_id (inferior_ptid
);
12063 /* We're being called after following a fork. The new fork is
12064 selected as current, and unless this was a vfork will have a
12065 different program space from the original thread. Reset that
12067 b
->loc
->pspace
= current_program_space
;
12071 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
12072 If from_tty is nonzero, it prints a message to that effect,
12073 which ends with a period (no newline). */
12076 set_ignore_count (int bptnum
, int count
, int from_tty
)
12078 struct breakpoint
*b
;
12083 ALL_BREAKPOINTS (b
)
12084 if (b
->number
== bptnum
)
12086 if (is_tracepoint (b
))
12088 if (from_tty
&& count
!= 0)
12089 printf_filtered (_("Ignore count ignored for tracepoint %d."),
12094 b
->ignore_count
= count
;
12098 printf_filtered (_("Will stop next time "
12099 "breakpoint %d is reached."),
12101 else if (count
== 1)
12102 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
12105 printf_filtered (_("Will ignore next %d "
12106 "crossings of breakpoint %d."),
12109 breakpoints_changed ();
12110 observer_notify_breakpoint_modified (b
);
12114 error (_("No breakpoint number %d."), bptnum
);
12117 /* Command to set ignore-count of breakpoint N to COUNT. */
12120 ignore_command (char *args
, int from_tty
)
12126 error_no_arg (_("a breakpoint number"));
12128 num
= get_number (&p
);
12130 error (_("bad breakpoint number: '%s'"), args
);
12132 error (_("Second argument (specified ignore-count) is missing."));
12134 set_ignore_count (num
,
12135 longest_to_int (value_as_long (parse_and_eval (p
))),
12138 printf_filtered ("\n");
12141 /* Call FUNCTION on each of the breakpoints
12142 whose numbers are given in ARGS. */
12145 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*,
12150 struct breakpoint
*b
, *tmp
;
12152 struct get_number_or_range_state state
;
12155 error_no_arg (_("one or more breakpoint numbers"));
12157 init_number_or_range (&state
, args
);
12159 while (!state
.finished
)
12161 char *p
= state
.string
;
12165 num
= get_number_or_range (&state
);
12168 warning (_("bad breakpoint number at or near '%s'"), p
);
12172 ALL_BREAKPOINTS_SAFE (b
, tmp
)
12173 if (b
->number
== num
)
12176 function (b
, data
);
12180 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
12185 static struct bp_location
*
12186 find_location_by_number (char *number
)
12188 char *dot
= strchr (number
, '.');
12192 struct breakpoint
*b
;
12193 struct bp_location
*loc
;
12198 bp_num
= get_number (&p1
);
12200 error (_("Bad breakpoint number '%s'"), number
);
12202 ALL_BREAKPOINTS (b
)
12203 if (b
->number
== bp_num
)
12208 if (!b
|| b
->number
!= bp_num
)
12209 error (_("Bad breakpoint number '%s'"), number
);
12212 loc_num
= get_number (&p1
);
12214 error (_("Bad breakpoint location number '%s'"), number
);
12218 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
12221 error (_("Bad breakpoint location number '%s'"), dot
+1);
12227 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
12228 If from_tty is nonzero, it prints a message to that effect,
12229 which ends with a period (no newline). */
12232 disable_breakpoint (struct breakpoint
*bpt
)
12234 /* Never disable a watchpoint scope breakpoint; we want to
12235 hit them when we leave scope so we can delete both the
12236 watchpoint and its scope breakpoint at that time. */
12237 if (bpt
->type
== bp_watchpoint_scope
)
12240 /* You can't disable permanent breakpoints. */
12241 if (bpt
->enable_state
== bp_permanent
)
12244 bpt
->enable_state
= bp_disabled
;
12246 if (target_supports_enable_disable_tracepoint ()
12247 && current_trace_status ()->running
&& is_tracepoint (bpt
))
12249 struct bp_location
*location
;
12251 for (location
= bpt
->loc
; location
; location
= location
->next
)
12252 target_disable_tracepoint (location
);
12255 update_global_location_list (0);
12257 observer_notify_breakpoint_modified (bpt
);
12260 /* A callback for iterate_over_related_breakpoints. */
12263 do_disable_breakpoint (struct breakpoint
*b
, void *ignore
)
12265 disable_breakpoint (b
);
12268 /* A callback for map_breakpoint_numbers that calls
12269 disable_breakpoint. */
12272 do_map_disable_breakpoint (struct breakpoint
*b
, void *ignore
)
12274 iterate_over_related_breakpoints (b
, do_disable_breakpoint
, NULL
);
12278 disable_command (char *args
, int from_tty
)
12282 struct breakpoint
*bpt
;
12284 ALL_BREAKPOINTS (bpt
)
12285 if (user_breakpoint_p (bpt
))
12286 disable_breakpoint (bpt
);
12288 else if (strchr (args
, '.'))
12290 struct bp_location
*loc
= find_location_by_number (args
);
12294 if (target_supports_enable_disable_tracepoint ()
12295 && current_trace_status ()->running
&& loc
->owner
12296 && is_tracepoint (loc
->owner
))
12297 target_disable_tracepoint (loc
);
12299 update_global_location_list (0);
12302 map_breakpoint_numbers (args
, do_map_disable_breakpoint
, NULL
);
12306 enable_breakpoint_disp (struct breakpoint
*bpt
, enum bpdisp disposition
)
12308 int target_resources_ok
;
12310 if (bpt
->type
== bp_hardware_breakpoint
)
12313 i
= hw_breakpoint_used_count ();
12314 target_resources_ok
=
12315 target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
12317 if (target_resources_ok
== 0)
12318 error (_("No hardware breakpoint support in the target."));
12319 else if (target_resources_ok
< 0)
12320 error (_("Hardware breakpoints used exceeds limit."));
12323 if (is_watchpoint (bpt
))
12325 /* Initialize it just to avoid a GCC false warning. */
12326 enum enable_state orig_enable_state
= 0;
12327 struct gdb_exception e
;
12329 TRY_CATCH (e
, RETURN_MASK_ALL
)
12331 struct watchpoint
*w
= (struct watchpoint
*) bpt
;
12333 orig_enable_state
= bpt
->enable_state
;
12334 bpt
->enable_state
= bp_enabled
;
12335 update_watchpoint (w
, 1 /* reparse */);
12339 bpt
->enable_state
= orig_enable_state
;
12340 exception_fprintf (gdb_stderr
, e
, _("Cannot enable watchpoint %d: "),
12346 if (bpt
->enable_state
!= bp_permanent
)
12347 bpt
->enable_state
= bp_enabled
;
12349 if (target_supports_enable_disable_tracepoint ()
12350 && current_trace_status ()->running
&& is_tracepoint (bpt
))
12352 struct bp_location
*location
;
12354 for (location
= bpt
->loc
; location
; location
= location
->next
)
12355 target_enable_tracepoint (location
);
12358 bpt
->disposition
= disposition
;
12359 update_global_location_list (1);
12360 breakpoints_changed ();
12362 observer_notify_breakpoint_modified (bpt
);
12367 enable_breakpoint (struct breakpoint
*bpt
)
12369 enable_breakpoint_disp (bpt
, bpt
->disposition
);
12373 do_enable_breakpoint (struct breakpoint
*bpt
, void *arg
)
12375 enable_breakpoint (bpt
);
12378 /* A callback for map_breakpoint_numbers that calls
12379 enable_breakpoint. */
12382 do_map_enable_breakpoint (struct breakpoint
*b
, void *ignore
)
12384 iterate_over_related_breakpoints (b
, do_enable_breakpoint
, NULL
);
12387 /* The enable command enables the specified breakpoints (or all defined
12388 breakpoints) so they once again become (or continue to be) effective
12389 in stopping the inferior. */
12392 enable_command (char *args
, int from_tty
)
12396 struct breakpoint
*bpt
;
12398 ALL_BREAKPOINTS (bpt
)
12399 if (user_breakpoint_p (bpt
))
12400 enable_breakpoint (bpt
);
12402 else if (strchr (args
, '.'))
12404 struct bp_location
*loc
= find_location_by_number (args
);
12408 if (target_supports_enable_disable_tracepoint ()
12409 && current_trace_status ()->running
&& loc
->owner
12410 && is_tracepoint (loc
->owner
))
12411 target_enable_tracepoint (loc
);
12413 update_global_location_list (1);
12416 map_breakpoint_numbers (args
, do_map_enable_breakpoint
, NULL
);
12420 do_enable_breakpoint_disp (struct breakpoint
*bpt
, void *arg
)
12422 enum bpdisp disp
= *(enum bpdisp
*) arg
;
12424 enable_breakpoint_disp (bpt
, disp
);
12428 do_map_enable_once_breakpoint (struct breakpoint
*bpt
, void *ignore
)
12430 enum bpdisp disp
= disp_disable
;
12432 iterate_over_related_breakpoints (bpt
, do_enable_breakpoint_disp
, &disp
);
12436 enable_once_command (char *args
, int from_tty
)
12438 map_breakpoint_numbers (args
, do_map_enable_once_breakpoint
, NULL
);
12442 do_map_enable_delete_breakpoint (struct breakpoint
*bpt
, void *ignore
)
12444 enum bpdisp disp
= disp_del
;
12446 iterate_over_related_breakpoints (bpt
, do_enable_breakpoint_disp
, &disp
);
12450 enable_delete_command (char *args
, int from_tty
)
12452 map_breakpoint_numbers (args
, do_map_enable_delete_breakpoint
, NULL
);
12456 set_breakpoint_cmd (char *args
, int from_tty
)
12461 show_breakpoint_cmd (char *args
, int from_tty
)
12465 /* Invalidate last known value of any hardware watchpoint if
12466 the memory which that value represents has been written to by
12470 invalidate_bp_value_on_memory_change (CORE_ADDR addr
, int len
,
12471 const bfd_byte
*data
)
12473 struct breakpoint
*bp
;
12475 ALL_BREAKPOINTS (bp
)
12476 if (bp
->enable_state
== bp_enabled
12477 && bp
->type
== bp_hardware_watchpoint
)
12479 struct watchpoint
*wp
= (struct watchpoint
*) bp
;
12481 if (wp
->val_valid
&& wp
->val
)
12483 struct bp_location
*loc
;
12485 for (loc
= bp
->loc
; loc
!= NULL
; loc
= loc
->next
)
12486 if (loc
->loc_type
== bp_loc_hardware_watchpoint
12487 && loc
->address
+ loc
->length
> addr
12488 && addr
+ len
> loc
->address
)
12490 value_free (wp
->val
);
12498 /* Use the last displayed codepoint's values, or nothing
12499 if they aren't valid. */
12501 struct symtabs_and_lines
12502 decode_line_spec_1 (char *string
, int flags
)
12504 struct symtabs_and_lines sals
;
12507 error (_("Empty line specification."));
12508 if (last_displayed_sal_is_valid ())
12509 sals
= decode_line_1 (&string
, flags
,
12510 get_last_displayed_symtab (),
12511 get_last_displayed_line ());
12513 sals
= decode_line_1 (&string
, flags
, (struct symtab
*) NULL
, 0);
12515 error (_("Junk at end of line specification: %s"), string
);
12519 /* Create and insert a raw software breakpoint at PC. Return an
12520 identifier, which should be used to remove the breakpoint later.
12521 In general, places which call this should be using something on the
12522 breakpoint chain instead; this function should be eliminated
12526 deprecated_insert_raw_breakpoint (struct gdbarch
*gdbarch
,
12527 struct address_space
*aspace
, CORE_ADDR pc
)
12529 struct bp_target_info
*bp_tgt
;
12531 bp_tgt
= XZALLOC (struct bp_target_info
);
12533 bp_tgt
->placed_address_space
= aspace
;
12534 bp_tgt
->placed_address
= pc
;
12536 if (target_insert_breakpoint (gdbarch
, bp_tgt
) != 0)
12538 /* Could not insert the breakpoint. */
12546 /* Remove a breakpoint BP inserted by
12547 deprecated_insert_raw_breakpoint. */
12550 deprecated_remove_raw_breakpoint (struct gdbarch
*gdbarch
, void *bp
)
12552 struct bp_target_info
*bp_tgt
= bp
;
12555 ret
= target_remove_breakpoint (gdbarch
, bp_tgt
);
12561 /* One (or perhaps two) breakpoints used for software single
12564 static void *single_step_breakpoints
[2];
12565 static struct gdbarch
*single_step_gdbarch
[2];
12567 /* Create and insert a breakpoint for software single step. */
12570 insert_single_step_breakpoint (struct gdbarch
*gdbarch
,
12571 struct address_space
*aspace
,
12576 if (single_step_breakpoints
[0] == NULL
)
12578 bpt_p
= &single_step_breakpoints
[0];
12579 single_step_gdbarch
[0] = gdbarch
;
12583 gdb_assert (single_step_breakpoints
[1] == NULL
);
12584 bpt_p
= &single_step_breakpoints
[1];
12585 single_step_gdbarch
[1] = gdbarch
;
12588 /* NOTE drow/2006-04-11: A future improvement to this function would
12589 be to only create the breakpoints once, and actually put them on
12590 the breakpoint chain. That would let us use set_raw_breakpoint.
12591 We could adjust the addresses each time they were needed. Doing
12592 this requires corresponding changes elsewhere where single step
12593 breakpoints are handled, however. So, for now, we use this. */
12595 *bpt_p
= deprecated_insert_raw_breakpoint (gdbarch
, aspace
, next_pc
);
12596 if (*bpt_p
== NULL
)
12597 error (_("Could not insert single-step breakpoint at %s"),
12598 paddress (gdbarch
, next_pc
));
12601 /* Check if the breakpoints used for software single stepping
12602 were inserted or not. */
12605 single_step_breakpoints_inserted (void)
12607 return (single_step_breakpoints
[0] != NULL
12608 || single_step_breakpoints
[1] != NULL
);
12611 /* Remove and delete any breakpoints used for software single step. */
12614 remove_single_step_breakpoints (void)
12616 gdb_assert (single_step_breakpoints
[0] != NULL
);
12618 /* See insert_single_step_breakpoint for more about this deprecated
12620 deprecated_remove_raw_breakpoint (single_step_gdbarch
[0],
12621 single_step_breakpoints
[0]);
12622 single_step_gdbarch
[0] = NULL
;
12623 single_step_breakpoints
[0] = NULL
;
12625 if (single_step_breakpoints
[1] != NULL
)
12627 deprecated_remove_raw_breakpoint (single_step_gdbarch
[1],
12628 single_step_breakpoints
[1]);
12629 single_step_gdbarch
[1] = NULL
;
12630 single_step_breakpoints
[1] = NULL
;
12634 /* Delete software single step breakpoints without removing them from
12635 the inferior. This is intended to be used if the inferior's address
12636 space where they were inserted is already gone, e.g. after exit or
12640 cancel_single_step_breakpoints (void)
12644 for (i
= 0; i
< 2; i
++)
12645 if (single_step_breakpoints
[i
])
12647 xfree (single_step_breakpoints
[i
]);
12648 single_step_breakpoints
[i
] = NULL
;
12649 single_step_gdbarch
[i
] = NULL
;
12653 /* Detach software single-step breakpoints from INFERIOR_PTID without
12657 detach_single_step_breakpoints (void)
12661 for (i
= 0; i
< 2; i
++)
12662 if (single_step_breakpoints
[i
])
12663 target_remove_breakpoint (single_step_gdbarch
[i
],
12664 single_step_breakpoints
[i
]);
12667 /* Check whether a software single-step breakpoint is inserted at
12671 single_step_breakpoint_inserted_here_p (struct address_space
*aspace
,
12676 for (i
= 0; i
< 2; i
++)
12678 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
12680 && breakpoint_address_match (bp_tgt
->placed_address_space
,
12681 bp_tgt
->placed_address
,
12689 /* Returns 0 if 'bp' is NOT a syscall catchpoint,
12690 non-zero otherwise. */
12692 is_syscall_catchpoint_enabled (struct breakpoint
*bp
)
12694 if (syscall_catchpoint_p (bp
)
12695 && bp
->enable_state
!= bp_disabled
12696 && bp
->enable_state
!= bp_call_disabled
)
12703 catch_syscall_enabled (void)
12705 struct inferior
*inf
= current_inferior ();
12707 return inf
->total_syscalls_count
!= 0;
12711 catching_syscall_number (int syscall_number
)
12713 struct breakpoint
*bp
;
12715 ALL_BREAKPOINTS (bp
)
12716 if (is_syscall_catchpoint_enabled (bp
))
12718 struct syscall_catchpoint
*c
= (struct syscall_catchpoint
*) bp
;
12720 if (c
->syscalls_to_be_caught
)
12724 VEC_iterate (int, c
->syscalls_to_be_caught
, i
, iter
);
12726 if (syscall_number
== iter
)
12736 /* Complete syscall names. Used by "catch syscall". */
12738 catch_syscall_completer (struct cmd_list_element
*cmd
,
12739 char *text
, char *word
)
12741 const char **list
= get_syscall_names ();
12743 = (list
== NULL
) ? NULL
: complete_on_enum (list
, text
, word
);
12749 /* Tracepoint-specific operations. */
12751 /* Set tracepoint count to NUM. */
12753 set_tracepoint_count (int num
)
12755 tracepoint_count
= num
;
12756 set_internalvar_integer (lookup_internalvar ("tpnum"), num
);
12760 trace_command (char *arg
, int from_tty
)
12762 if (create_breakpoint (get_current_arch (),
12764 NULL
, 0, 1 /* parse arg */,
12766 bp_tracepoint
/* type_wanted */,
12767 0 /* Ignore count */,
12768 pending_break_support
,
12769 &tracepoint_breakpoint_ops
,
12773 set_tracepoint_count (breakpoint_count
);
12777 ftrace_command (char *arg
, int from_tty
)
12779 if (create_breakpoint (get_current_arch (),
12781 NULL
, 0, 1 /* parse arg */,
12783 bp_fast_tracepoint
/* type_wanted */,
12784 0 /* Ignore count */,
12785 pending_break_support
,
12786 &tracepoint_breakpoint_ops
,
12790 set_tracepoint_count (breakpoint_count
);
12793 /* strace command implementation. Creates a static tracepoint. */
12796 strace_command (char *arg
, int from_tty
)
12798 if (create_breakpoint (get_current_arch (),
12800 NULL
, 0, 1 /* parse arg */,
12802 bp_static_tracepoint
/* type_wanted */,
12803 0 /* Ignore count */,
12804 pending_break_support
,
12805 &tracepoint_breakpoint_ops
,
12809 set_tracepoint_count (breakpoint_count
);
12812 /* Set up a fake reader function that gets command lines from a linked
12813 list that was acquired during tracepoint uploading. */
12815 static struct uploaded_tp
*this_utp
;
12816 static int next_cmd
;
12819 read_uploaded_action (void)
12823 VEC_iterate (char_ptr
, this_utp
->cmd_strings
, next_cmd
, rslt
);
12830 /* Given information about a tracepoint as recorded on a target (which
12831 can be either a live system or a trace file), attempt to create an
12832 equivalent GDB tracepoint. This is not a reliable process, since
12833 the target does not necessarily have all the information used when
12834 the tracepoint was originally defined. */
12836 struct tracepoint
*
12837 create_tracepoint_from_upload (struct uploaded_tp
*utp
)
12839 char *addr_str
, small_buf
[100];
12840 struct tracepoint
*tp
;
12842 if (utp
->at_string
)
12843 addr_str
= utp
->at_string
;
12846 /* In the absence of a source location, fall back to raw
12847 address. Since there is no way to confirm that the address
12848 means the same thing as when the trace was started, warn the
12850 warning (_("Uploaded tracepoint %d has no "
12851 "source location, using raw address"),
12853 sprintf (small_buf
, "*%s", hex_string (utp
->addr
));
12854 addr_str
= small_buf
;
12857 /* There's not much we can do with a sequence of bytecodes. */
12858 if (utp
->cond
&& !utp
->cond_string
)
12859 warning (_("Uploaded tracepoint %d condition "
12860 "has no source form, ignoring it"),
12863 if (!create_breakpoint (get_current_arch (),
12865 utp
->cond_string
, -1, 0 /* parse cond/thread */,
12867 utp
->type
/* type_wanted */,
12868 0 /* Ignore count */,
12869 pending_break_support
,
12870 &tracepoint_breakpoint_ops
,
12872 utp
->enabled
/* enabled */,
12876 set_tracepoint_count (breakpoint_count
);
12878 /* Get the tracepoint we just created. */
12879 tp
= get_tracepoint (tracepoint_count
);
12880 gdb_assert (tp
!= NULL
);
12884 sprintf (small_buf
, "%d %d", utp
->pass
, tp
->base
.number
);
12886 trace_pass_command (small_buf
, 0);
12889 /* If we have uploaded versions of the original commands, set up a
12890 special-purpose "reader" function and call the usual command line
12891 reader, then pass the result to the breakpoint command-setting
12893 if (!VEC_empty (char_ptr
, utp
->cmd_strings
))
12895 struct command_line
*cmd_list
;
12900 cmd_list
= read_command_lines_1 (read_uploaded_action
, 1, NULL
, NULL
);
12902 breakpoint_set_commands (&tp
->base
, cmd_list
);
12904 else if (!VEC_empty (char_ptr
, utp
->actions
)
12905 || !VEC_empty (char_ptr
, utp
->step_actions
))
12906 warning (_("Uploaded tracepoint %d actions "
12907 "have no source form, ignoring them"),
12910 /* Copy any status information that might be available. */
12911 tp
->base
.hit_count
= utp
->hit_count
;
12912 tp
->traceframe_usage
= utp
->traceframe_usage
;
12917 /* Print information on tracepoint number TPNUM_EXP, or all if
12921 tracepoints_info (char *args
, int from_tty
)
12923 struct ui_out
*uiout
= current_uiout
;
12926 num_printed
= breakpoint_1 (args
, 0, is_tracepoint
);
12928 if (num_printed
== 0)
12930 if (args
== NULL
|| *args
== '\0')
12931 ui_out_message (uiout
, 0, "No tracepoints.\n");
12933 ui_out_message (uiout
, 0, "No tracepoint matching '%s'.\n", args
);
12936 default_collect_info ();
12939 /* The 'enable trace' command enables tracepoints.
12940 Not supported by all targets. */
12942 enable_trace_command (char *args
, int from_tty
)
12944 enable_command (args
, from_tty
);
12947 /* The 'disable trace' command disables tracepoints.
12948 Not supported by all targets. */
12950 disable_trace_command (char *args
, int from_tty
)
12952 disable_command (args
, from_tty
);
12955 /* Remove a tracepoint (or all if no argument). */
12957 delete_trace_command (char *arg
, int from_tty
)
12959 struct breakpoint
*b
, *b_tmp
;
12965 int breaks_to_delete
= 0;
12967 /* Delete all breakpoints if no argument.
12968 Do not delete internal or call-dummy breakpoints, these
12969 have to be deleted with an explicit breakpoint number
12971 ALL_TRACEPOINTS (b
)
12972 if (is_tracepoint (b
) && user_breakpoint_p (b
))
12974 breaks_to_delete
= 1;
12978 /* Ask user only if there are some breakpoints to delete. */
12980 || (breaks_to_delete
&& query (_("Delete all tracepoints? "))))
12982 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
12983 if (is_tracepoint (b
) && user_breakpoint_p (b
))
12984 delete_breakpoint (b
);
12988 map_breakpoint_numbers (arg
, do_map_delete_breakpoint
, NULL
);
12991 /* Helper function for trace_pass_command. */
12994 trace_pass_set_count (struct tracepoint
*tp
, int count
, int from_tty
)
12996 tp
->pass_count
= count
;
12997 observer_notify_tracepoint_modified (tp
->base
.number
);
12999 printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
13000 tp
->base
.number
, count
);
13003 /* Set passcount for tracepoint.
13005 First command argument is passcount, second is tracepoint number.
13006 If tracepoint number omitted, apply to most recently defined.
13007 Also accepts special argument "all". */
13010 trace_pass_command (char *args
, int from_tty
)
13012 struct tracepoint
*t1
;
13013 unsigned int count
;
13015 if (args
== 0 || *args
== 0)
13016 error (_("passcount command requires an "
13017 "argument (count + optional TP num)"));
13019 count
= strtoul (args
, &args
, 10); /* Count comes first, then TP num. */
13021 while (*args
&& isspace ((int) *args
))
13024 if (*args
&& strncasecmp (args
, "all", 3) == 0)
13026 struct breakpoint
*b
;
13028 args
+= 3; /* Skip special argument "all". */
13030 error (_("Junk at end of arguments."));
13032 ALL_TRACEPOINTS (b
)
13034 t1
= (struct tracepoint
*) b
;
13035 trace_pass_set_count (t1
, count
, from_tty
);
13038 else if (*args
== '\0')
13040 t1
= get_tracepoint_by_number (&args
, NULL
, 1);
13042 trace_pass_set_count (t1
, count
, from_tty
);
13046 struct get_number_or_range_state state
;
13048 init_number_or_range (&state
, args
);
13049 while (!state
.finished
)
13051 t1
= get_tracepoint_by_number (&args
, &state
, 1);
13053 trace_pass_set_count (t1
, count
, from_tty
);
13058 struct tracepoint
*
13059 get_tracepoint (int num
)
13061 struct breakpoint
*t
;
13063 ALL_TRACEPOINTS (t
)
13064 if (t
->number
== num
)
13065 return (struct tracepoint
*) t
;
13070 /* Find the tracepoint with the given target-side number (which may be
13071 different from the tracepoint number after disconnecting and
13074 struct tracepoint
*
13075 get_tracepoint_by_number_on_target (int num
)
13077 struct breakpoint
*b
;
13079 ALL_TRACEPOINTS (b
)
13081 struct tracepoint
*t
= (struct tracepoint
*) b
;
13083 if (t
->number_on_target
== num
)
13090 /* Utility: parse a tracepoint number and look it up in the list.
13091 If STATE is not NULL, use, get_number_or_range_state and ignore ARG.
13092 If OPTIONAL_P is true, then if the argument is missing, the most
13093 recent tracepoint (tracepoint_count) is returned. */
13094 struct tracepoint
*
13095 get_tracepoint_by_number (char **arg
,
13096 struct get_number_or_range_state
*state
,
13099 extern int tracepoint_count
;
13100 struct breakpoint
*t
;
13102 char *instring
= arg
== NULL
? NULL
: *arg
;
13106 gdb_assert (!state
->finished
);
13107 tpnum
= get_number_or_range (state
);
13109 else if (arg
== NULL
|| *arg
== NULL
|| ! **arg
)
13112 tpnum
= tracepoint_count
;
13114 error_no_arg (_("tracepoint number"));
13117 tpnum
= get_number (arg
);
13121 if (instring
&& *instring
)
13122 printf_filtered (_("bad tracepoint number at or near '%s'\n"),
13125 printf_filtered (_("Tracepoint argument missing "
13126 "and no previous tracepoint\n"));
13130 ALL_TRACEPOINTS (t
)
13131 if (t
->number
== tpnum
)
13133 return (struct tracepoint
*) t
;
13136 printf_unfiltered ("No tracepoint number %d.\n", tpnum
);
13141 print_recreate_thread (struct breakpoint
*b
, struct ui_file
*fp
)
13143 if (b
->thread
!= -1)
13144 fprintf_unfiltered (fp
, " thread %d", b
->thread
);
13147 fprintf_unfiltered (fp
, " task %d", b
->task
);
13149 fprintf_unfiltered (fp
, "\n");
13152 /* Save information on user settable breakpoints (watchpoints, etc) to
13153 a new script file named FILENAME. If FILTER is non-NULL, call it
13154 on each breakpoint and only include the ones for which it returns
13158 save_breakpoints (char *filename
, int from_tty
,
13159 int (*filter
) (const struct breakpoint
*))
13161 struct breakpoint
*tp
;
13164 struct cleanup
*cleanup
;
13165 struct ui_file
*fp
;
13166 int extra_trace_bits
= 0;
13168 if (filename
== 0 || *filename
== 0)
13169 error (_("Argument required (file name in which to save)"));
13171 /* See if we have anything to save. */
13172 ALL_BREAKPOINTS (tp
)
13174 /* Skip internal and momentary breakpoints. */
13175 if (!user_breakpoint_p (tp
))
13178 /* If we have a filter, only save the breakpoints it accepts. */
13179 if (filter
&& !filter (tp
))
13184 if (is_tracepoint (tp
))
13186 extra_trace_bits
= 1;
13188 /* We can stop searching. */
13195 warning (_("Nothing to save."));
13199 pathname
= tilde_expand (filename
);
13200 cleanup
= make_cleanup (xfree
, pathname
);
13201 fp
= gdb_fopen (pathname
, "w");
13203 error (_("Unable to open file '%s' for saving (%s)"),
13204 filename
, safe_strerror (errno
));
13205 make_cleanup_ui_file_delete (fp
);
13207 if (extra_trace_bits
)
13208 save_trace_state_variables (fp
);
13210 ALL_BREAKPOINTS (tp
)
13212 /* Skip internal and momentary breakpoints. */
13213 if (!user_breakpoint_p (tp
))
13216 /* If we have a filter, only save the breakpoints it accepts. */
13217 if (filter
&& !filter (tp
))
13220 tp
->ops
->print_recreate (tp
, fp
);
13222 /* Note, we can't rely on tp->number for anything, as we can't
13223 assume the recreated breakpoint numbers will match. Use $bpnum
13226 if (tp
->cond_string
)
13227 fprintf_unfiltered (fp
, " condition $bpnum %s\n", tp
->cond_string
);
13229 if (tp
->ignore_count
)
13230 fprintf_unfiltered (fp
, " ignore $bpnum %d\n", tp
->ignore_count
);
13234 volatile struct gdb_exception ex
;
13236 fprintf_unfiltered (fp
, " commands\n");
13238 ui_out_redirect (current_uiout
, fp
);
13239 TRY_CATCH (ex
, RETURN_MASK_ALL
)
13241 print_command_lines (current_uiout
, tp
->commands
->commands
, 2);
13243 ui_out_redirect (current_uiout
, NULL
);
13246 throw_exception (ex
);
13248 fprintf_unfiltered (fp
, " end\n");
13251 if (tp
->enable_state
== bp_disabled
)
13252 fprintf_unfiltered (fp
, "disable\n");
13254 /* If this is a multi-location breakpoint, check if the locations
13255 should be individually disabled. Watchpoint locations are
13256 special, and not user visible. */
13257 if (!is_watchpoint (tp
) && tp
->loc
&& tp
->loc
->next
)
13259 struct bp_location
*loc
;
13262 for (loc
= tp
->loc
; loc
!= NULL
; loc
= loc
->next
, n
++)
13264 fprintf_unfiltered (fp
, "disable $bpnum.%d\n", n
);
13268 if (extra_trace_bits
&& *default_collect
)
13269 fprintf_unfiltered (fp
, "set default-collect %s\n", default_collect
);
13271 do_cleanups (cleanup
);
13273 printf_filtered (_("Saved to file '%s'.\n"), filename
);
13276 /* The `save breakpoints' command. */
13279 save_breakpoints_command (char *args
, int from_tty
)
13281 save_breakpoints (args
, from_tty
, NULL
);
13284 /* The `save tracepoints' command. */
13287 save_tracepoints_command (char *args
, int from_tty
)
13289 save_breakpoints (args
, from_tty
, is_tracepoint
);
13292 /* Create a vector of all tracepoints. */
13294 VEC(breakpoint_p
) *
13295 all_tracepoints (void)
13297 VEC(breakpoint_p
) *tp_vec
= 0;
13298 struct breakpoint
*tp
;
13300 ALL_TRACEPOINTS (tp
)
13302 VEC_safe_push (breakpoint_p
, tp_vec
, tp
);
13309 /* This help string is used for the break, hbreak, tbreak and thbreak
13310 commands. It is defined as a macro to prevent duplication.
13311 COMMAND should be a string constant containing the name of the
13313 #define BREAK_ARGS_HELP(command) \
13314 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
13315 LOCATION may be a line number, function name, or \"*\" and an address.\n\
13316 If a line number is specified, break at start of code for that line.\n\
13317 If a function is specified, break at start of code for that function.\n\
13318 If an address is specified, break at that exact address.\n\
13319 With no LOCATION, uses current execution address of the selected\n\
13320 stack frame. This is useful for breaking on return to a stack frame.\n\
13322 THREADNUM is the number from \"info threads\".\n\
13323 CONDITION is a boolean expression.\n\
13325 Multiple breakpoints at one place are permitted, and useful if their\n\
13326 conditions are different.\n\
13328 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
13330 /* List of subcommands for "catch". */
13331 static struct cmd_list_element
*catch_cmdlist
;
13333 /* List of subcommands for "tcatch". */
13334 static struct cmd_list_element
*tcatch_cmdlist
;
13337 add_catch_command (char *name
, char *docstring
,
13338 void (*sfunc
) (char *args
, int from_tty
,
13339 struct cmd_list_element
*command
),
13340 char **(*completer
) (struct cmd_list_element
*cmd
,
13341 char *text
, char *word
),
13342 void *user_data_catch
,
13343 void *user_data_tcatch
)
13345 struct cmd_list_element
*command
;
13347 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
13349 set_cmd_sfunc (command
, sfunc
);
13350 set_cmd_context (command
, user_data_catch
);
13351 set_cmd_completer (command
, completer
);
13353 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
13355 set_cmd_sfunc (command
, sfunc
);
13356 set_cmd_context (command
, user_data_tcatch
);
13357 set_cmd_completer (command
, completer
);
13361 clear_syscall_counts (struct inferior
*inf
)
13363 inf
->total_syscalls_count
= 0;
13364 inf
->any_syscall_count
= 0;
13365 VEC_free (int, inf
->syscalls_counts
);
13369 save_command (char *arg
, int from_tty
)
13371 printf_unfiltered (_("\"save\" must be followed by "
13372 "the name of a save subcommand.\n"));
13373 help_list (save_cmdlist
, "save ", -1, gdb_stdout
);
13376 struct breakpoint
*
13377 iterate_over_breakpoints (int (*callback
) (struct breakpoint
*, void *),
13380 struct breakpoint
*b
, *b_tmp
;
13382 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
13384 if ((*callback
) (b
, data
))
13391 /* Zero if any of the breakpoint's locations could be a location where
13392 functions have been inlined, nonzero otherwise. */
13395 is_non_inline_function (struct breakpoint
*b
)
13397 /* The shared library event breakpoint is set on the address of a
13398 non-inline function. */
13399 if (b
->type
== bp_shlib_event
)
13405 /* Nonzero if the specified PC cannot be a location where functions
13406 have been inlined. */
13409 pc_at_non_inline_function (struct address_space
*aspace
, CORE_ADDR pc
)
13411 struct breakpoint
*b
;
13412 struct bp_location
*bl
;
13414 ALL_BREAKPOINTS (b
)
13416 if (!is_non_inline_function (b
))
13419 for (bl
= b
->loc
; bl
!= NULL
; bl
= bl
->next
)
13421 if (!bl
->shlib_disabled
13422 && bpstat_check_location (bl
, aspace
, pc
))
13431 initialize_breakpoint_ops (void)
13433 static int initialized
= 0;
13435 struct breakpoint_ops
*ops
;
13441 /* The breakpoint_ops structure to be inherit by all kinds of
13442 breakpoints (real breakpoints, i.e., user "break" breakpoints,
13443 internal and momentary breakpoints, etc.). */
13444 ops
= &bkpt_base_breakpoint_ops
;
13445 *ops
= base_breakpoint_ops
;
13446 ops
->re_set
= bkpt_re_set
;
13447 ops
->insert_location
= bkpt_insert_location
;
13448 ops
->remove_location
= bkpt_remove_location
;
13449 ops
->breakpoint_hit
= bkpt_breakpoint_hit
;
13451 /* The breakpoint_ops structure to be used in regular breakpoints. */
13452 ops
= &bkpt_breakpoint_ops
;
13453 *ops
= bkpt_base_breakpoint_ops
;
13454 ops
->re_set
= bkpt_re_set
;
13455 ops
->resources_needed
= bkpt_resources_needed
;
13456 ops
->print_it
= bkpt_print_it
;
13457 ops
->print_mention
= bkpt_print_mention
;
13458 ops
->print_recreate
= bkpt_print_recreate
;
13460 /* Ranged breakpoints. */
13461 ops
= &ranged_breakpoint_ops
;
13462 *ops
= bkpt_breakpoint_ops
;
13463 ops
->breakpoint_hit
= breakpoint_hit_ranged_breakpoint
;
13464 ops
->resources_needed
= resources_needed_ranged_breakpoint
;
13465 ops
->print_it
= print_it_ranged_breakpoint
;
13466 ops
->print_one
= print_one_ranged_breakpoint
;
13467 ops
->print_one_detail
= print_one_detail_ranged_breakpoint
;
13468 ops
->print_mention
= print_mention_ranged_breakpoint
;
13469 ops
->print_recreate
= print_recreate_ranged_breakpoint
;
13471 /* Internal breakpoints. */
13472 ops
= &internal_breakpoint_ops
;
13473 *ops
= bkpt_base_breakpoint_ops
;
13474 ops
->re_set
= internal_bkpt_re_set
;
13475 ops
->check_status
= internal_bkpt_check_status
;
13476 ops
->print_it
= internal_bkpt_print_it
;
13477 ops
->print_mention
= internal_bkpt_print_mention
;
13479 /* Momentary breakpoints. */
13480 ops
= &momentary_breakpoint_ops
;
13481 *ops
= bkpt_base_breakpoint_ops
;
13482 ops
->re_set
= momentary_bkpt_re_set
;
13483 ops
->check_status
= momentary_bkpt_check_status
;
13484 ops
->print_it
= momentary_bkpt_print_it
;
13485 ops
->print_mention
= momentary_bkpt_print_mention
;
13487 /* GNU v3 exception catchpoints. */
13488 ops
= &gnu_v3_exception_catchpoint_ops
;
13489 *ops
= bkpt_breakpoint_ops
;
13490 ops
->print_it
= print_it_exception_catchpoint
;
13491 ops
->print_one
= print_one_exception_catchpoint
;
13492 ops
->print_mention
= print_mention_exception_catchpoint
;
13493 ops
->print_recreate
= print_recreate_exception_catchpoint
;
13496 ops
= &watchpoint_breakpoint_ops
;
13497 *ops
= base_breakpoint_ops
;
13498 ops
->dtor
= dtor_watchpoint
;
13499 ops
->re_set
= re_set_watchpoint
;
13500 ops
->insert_location
= insert_watchpoint
;
13501 ops
->remove_location
= remove_watchpoint
;
13502 ops
->breakpoint_hit
= breakpoint_hit_watchpoint
;
13503 ops
->check_status
= check_status_watchpoint
;
13504 ops
->resources_needed
= resources_needed_watchpoint
;
13505 ops
->works_in_software_mode
= works_in_software_mode_watchpoint
;
13506 ops
->print_it
= print_it_watchpoint
;
13507 ops
->print_mention
= print_mention_watchpoint
;
13508 ops
->print_recreate
= print_recreate_watchpoint
;
13510 /* Masked watchpoints. */
13511 ops
= &masked_watchpoint_breakpoint_ops
;
13512 *ops
= watchpoint_breakpoint_ops
;
13513 ops
->insert_location
= insert_masked_watchpoint
;
13514 ops
->remove_location
= remove_masked_watchpoint
;
13515 ops
->resources_needed
= resources_needed_masked_watchpoint
;
13516 ops
->works_in_software_mode
= works_in_software_mode_masked_watchpoint
;
13517 ops
->print_it
= print_it_masked_watchpoint
;
13518 ops
->print_one_detail
= print_one_detail_masked_watchpoint
;
13519 ops
->print_mention
= print_mention_masked_watchpoint
;
13520 ops
->print_recreate
= print_recreate_masked_watchpoint
;
13523 ops
= &tracepoint_breakpoint_ops
;
13524 *ops
= base_breakpoint_ops
;
13525 ops
->re_set
= tracepoint_re_set
;
13526 ops
->breakpoint_hit
= tracepoint_breakpoint_hit
;
13527 ops
->print_one_detail
= tracepoint_print_one_detail
;
13528 ops
->print_mention
= tracepoint_print_mention
;
13529 ops
->print_recreate
= tracepoint_print_recreate
;
13531 /* Fork catchpoints. */
13532 ops
= &catch_fork_breakpoint_ops
;
13533 *ops
= base_breakpoint_ops
;
13534 ops
->insert_location
= insert_catch_fork
;
13535 ops
->remove_location
= remove_catch_fork
;
13536 ops
->breakpoint_hit
= breakpoint_hit_catch_fork
;
13537 ops
->print_it
= print_it_catch_fork
;
13538 ops
->print_one
= print_one_catch_fork
;
13539 ops
->print_mention
= print_mention_catch_fork
;
13540 ops
->print_recreate
= print_recreate_catch_fork
;
13542 /* Vfork catchpoints. */
13543 ops
= &catch_vfork_breakpoint_ops
;
13544 *ops
= base_breakpoint_ops
;
13545 ops
->insert_location
= insert_catch_vfork
;
13546 ops
->remove_location
= remove_catch_vfork
;
13547 ops
->breakpoint_hit
= breakpoint_hit_catch_vfork
;
13548 ops
->print_it
= print_it_catch_vfork
;
13549 ops
->print_one
= print_one_catch_vfork
;
13550 ops
->print_mention
= print_mention_catch_vfork
;
13551 ops
->print_recreate
= print_recreate_catch_vfork
;
13553 /* Exec catchpoints. */
13554 ops
= &catch_exec_breakpoint_ops
;
13555 *ops
= base_breakpoint_ops
;
13556 ops
->dtor
= dtor_catch_exec
;
13557 ops
->insert_location
= insert_catch_exec
;
13558 ops
->remove_location
= remove_catch_exec
;
13559 ops
->breakpoint_hit
= breakpoint_hit_catch_exec
;
13560 ops
->print_it
= print_it_catch_exec
;
13561 ops
->print_one
= print_one_catch_exec
;
13562 ops
->print_mention
= print_mention_catch_exec
;
13563 ops
->print_recreate
= print_recreate_catch_exec
;
13565 /* Syscall catchpoints. */
13566 ops
= &catch_syscall_breakpoint_ops
;
13567 *ops
= base_breakpoint_ops
;
13568 ops
->dtor
= dtor_catch_syscall
;
13569 ops
->insert_location
= insert_catch_syscall
;
13570 ops
->remove_location
= remove_catch_syscall
;
13571 ops
->breakpoint_hit
= breakpoint_hit_catch_syscall
;
13572 ops
->print_it
= print_it_catch_syscall
;
13573 ops
->print_one
= print_one_catch_syscall
;
13574 ops
->print_mention
= print_mention_catch_syscall
;
13575 ops
->print_recreate
= print_recreate_catch_syscall
;
13579 _initialize_breakpoint (void)
13581 struct cmd_list_element
*c
;
13583 initialize_breakpoint_ops ();
13585 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
13586 observer_attach_inferior_exit (clear_syscall_counts
);
13587 observer_attach_memory_changed (invalidate_bp_value_on_memory_change
);
13589 breakpoint_objfile_key
= register_objfile_data ();
13591 breakpoint_chain
= 0;
13592 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
13593 before a breakpoint is set. */
13594 breakpoint_count
= 0;
13596 tracepoint_count
= 0;
13598 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
13599 Set ignore-count of breakpoint number N to COUNT.\n\
13600 Usage is `ignore N COUNT'."));
13602 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
13604 add_com ("commands", class_breakpoint
, commands_command
, _("\
13605 Set commands to be executed when a breakpoint is hit.\n\
13606 Give breakpoint number as argument after \"commands\".\n\
13607 With no argument, the targeted breakpoint is the last one set.\n\
13608 The commands themselves follow starting on the next line.\n\
13609 Type a line containing \"end\" to indicate the end of them.\n\
13610 Give \"silent\" as the first line to make the breakpoint silent;\n\
13611 then no output is printed when it is hit, except what the commands print."));
13613 add_com ("condition", class_breakpoint
, condition_command
, _("\
13614 Specify breakpoint number N to break only if COND is true.\n\
13615 Usage is `condition N COND', where N is an integer and COND is an\n\
13616 expression to be evaluated whenever breakpoint N is reached."));
13618 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
13619 Set a temporary breakpoint.\n\
13620 Like \"break\" except the breakpoint is only temporary,\n\
13621 so it will be deleted when hit. Equivalent to \"break\" followed\n\
13622 by using \"enable delete\" on the breakpoint number.\n\
13624 BREAK_ARGS_HELP ("tbreak")));
13625 set_cmd_completer (c
, location_completer
);
13627 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
13628 Set a hardware assisted breakpoint.\n\
13629 Like \"break\" except the breakpoint requires hardware support,\n\
13630 some target hardware may not have this support.\n\
13632 BREAK_ARGS_HELP ("hbreak")));
13633 set_cmd_completer (c
, location_completer
);
13635 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
13636 Set a temporary hardware assisted breakpoint.\n\
13637 Like \"hbreak\" except the breakpoint is only temporary,\n\
13638 so it will be deleted when hit.\n\
13640 BREAK_ARGS_HELP ("thbreak")));
13641 set_cmd_completer (c
, location_completer
);
13643 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
13644 Enable some breakpoints.\n\
13645 Give breakpoint numbers (separated by spaces) as arguments.\n\
13646 With no subcommand, breakpoints are enabled until you command otherwise.\n\
13647 This is used to cancel the effect of the \"disable\" command.\n\
13648 With a subcommand you can enable temporarily."),
13649 &enablelist
, "enable ", 1, &cmdlist
);
13651 add_com ("ab", class_breakpoint
, enable_command
, _("\
13652 Enable some breakpoints.\n\
13653 Give breakpoint numbers (separated by spaces) as arguments.\n\
13654 With no subcommand, breakpoints are enabled until you command otherwise.\n\
13655 This is used to cancel the effect of the \"disable\" command.\n\
13656 With a subcommand you can enable temporarily."));
13658 add_com_alias ("en", "enable", class_breakpoint
, 1);
13660 add_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
13661 Enable some breakpoints.\n\
13662 Give breakpoint numbers (separated by spaces) as arguments.\n\
13663 This is used to cancel the effect of the \"disable\" command.\n\
13664 May be abbreviated to simply \"enable\".\n"),
13665 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
13667 add_cmd ("once", no_class
, enable_once_command
, _("\
13668 Enable breakpoints for one hit. Give breakpoint numbers.\n\
13669 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
13672 add_cmd ("delete", no_class
, enable_delete_command
, _("\
13673 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
13674 If a breakpoint is hit while enabled in this fashion, it is deleted."),
13677 add_cmd ("delete", no_class
, enable_delete_command
, _("\
13678 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
13679 If a breakpoint is hit while enabled in this fashion, it is deleted."),
13682 add_cmd ("once", no_class
, enable_once_command
, _("\
13683 Enable breakpoints for one hit. Give breakpoint numbers.\n\
13684 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
13687 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
13688 Disable some breakpoints.\n\
13689 Arguments are breakpoint numbers with spaces in between.\n\
13690 To disable all breakpoints, give no argument.\n\
13691 A disabled breakpoint is not forgotten, but has no effect until re-enabled."),
13692 &disablelist
, "disable ", 1, &cmdlist
);
13693 add_com_alias ("dis", "disable", class_breakpoint
, 1);
13694 add_com_alias ("disa", "disable", class_breakpoint
, 1);
13696 add_com ("sb", class_breakpoint
, disable_command
, _("\
13697 Disable some breakpoints.\n\
13698 Arguments are breakpoint numbers with spaces in between.\n\
13699 To disable all breakpoints, give no argument.\n\
13700 A disabled breakpoint is not forgotten, but has no effect until re-enabled."));
13702 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
13703 Disable some breakpoints.\n\
13704 Arguments are breakpoint numbers with spaces in between.\n\
13705 To disable all breakpoints, give no argument.\n\
13706 A disabled breakpoint is not forgotten, but has no effect until re-enabled.\n\
13707 This command may be abbreviated \"disable\"."),
13710 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
13711 Delete some breakpoints or auto-display expressions.\n\
13712 Arguments are breakpoint numbers with spaces in between.\n\
13713 To delete all breakpoints, give no argument.\n\
13715 Also a prefix command for deletion of other GDB objects.\n\
13716 The \"unset\" command is also an alias for \"delete\"."),
13717 &deletelist
, "delete ", 1, &cmdlist
);
13718 add_com_alias ("d", "delete", class_breakpoint
, 1);
13719 add_com_alias ("del", "delete", class_breakpoint
, 1);
13721 add_com ("db", class_breakpoint
, delete_command
, _("\
13722 Delete some breakpoints.\n\
13723 Arguments are breakpoint numbers with spaces in between.\n\
13724 To delete all breakpoints, give no argument.\n"));
13726 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
13727 Delete some breakpoints or auto-display expressions.\n\
13728 Arguments are breakpoint numbers with spaces in between.\n\
13729 To delete all breakpoints, give no argument.\n\
13730 This command may be abbreviated \"delete\"."),
13733 add_com ("clear", class_breakpoint
, clear_command
, _("\
13734 Clear breakpoint at specified line or function.\n\
13735 Argument may be line number, function name, or \"*\" and an address.\n\
13736 If line number is specified, all breakpoints in that line are cleared.\n\
13737 If function is specified, breakpoints at beginning of function are cleared.\n\
13738 If an address is specified, breakpoints at that address are cleared.\n\
13740 With no argument, clears all breakpoints in the line that the selected frame\n\
13741 is executing in.\n\
13743 See also the \"delete\" command which clears breakpoints by number."));
13744 add_com_alias ("cl", "clear", class_breakpoint
, 1);
13746 c
= add_com ("break", class_breakpoint
, break_command
, _("\
13747 Set breakpoint at specified line or function.\n"
13748 BREAK_ARGS_HELP ("break")));
13749 set_cmd_completer (c
, location_completer
);
13751 add_com_alias ("b", "break", class_run
, 1);
13752 add_com_alias ("br", "break", class_run
, 1);
13753 add_com_alias ("bre", "break", class_run
, 1);
13754 add_com_alias ("brea", "break", class_run
, 1);
13757 add_com_alias ("ba", "break", class_breakpoint
, 1);
13761 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
13762 Break in function/address or break at a line in the current file."),
13763 &stoplist
, "stop ", 1, &cmdlist
);
13764 add_cmd ("in", class_breakpoint
, stopin_command
,
13765 _("Break in function or address."), &stoplist
);
13766 add_cmd ("at", class_breakpoint
, stopat_command
,
13767 _("Break at a line in the current file."), &stoplist
);
13768 add_com ("status", class_info
, breakpoints_info
, _("\
13769 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
13770 The \"Type\" column indicates one of:\n\
13771 \tbreakpoint - normal breakpoint\n\
13772 \twatchpoint - watchpoint\n\
13773 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
13774 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
13775 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
13776 address and file/line number respectively.\n\
13778 Convenience variable \"$_\" and default examine address for \"x\"\n\
13779 are set to the address of the last breakpoint listed unless the command\n\
13780 is prefixed with \"server \".\n\n\
13781 Convenience variable \"$bpnum\" contains the number of the last\n\
13782 breakpoint set."));
13785 add_info ("breakpoints", breakpoints_info
, _("\
13786 Status of specified breakpoints (all user-settable breakpoints if no argument).\n\
13787 The \"Type\" column indicates one of:\n\
13788 \tbreakpoint - normal breakpoint\n\
13789 \twatchpoint - watchpoint\n\
13790 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
13791 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
13792 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
13793 address and file/line number respectively.\n\
13795 Convenience variable \"$_\" and default examine address for \"x\"\n\
13796 are set to the address of the last breakpoint listed unless the command\n\
13797 is prefixed with \"server \".\n\n\
13798 Convenience variable \"$bpnum\" contains the number of the last\n\
13799 breakpoint set."));
13801 add_info_alias ("b", "breakpoints", 1);
13804 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
13805 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
13806 The \"Type\" column indicates one of:\n\
13807 \tbreakpoint - normal breakpoint\n\
13808 \twatchpoint - watchpoint\n\
13809 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
13810 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
13811 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
13812 address and file/line number respectively.\n\
13814 Convenience variable \"$_\" and default examine address for \"x\"\n\
13815 are set to the address of the last breakpoint listed unless the command\n\
13816 is prefixed with \"server \".\n\n\
13817 Convenience variable \"$bpnum\" contains the number of the last\n\
13818 breakpoint set."));
13820 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
13821 Status of all breakpoints, or breakpoint number NUMBER.\n\
13822 The \"Type\" column indicates one of:\n\
13823 \tbreakpoint - normal breakpoint\n\
13824 \twatchpoint - watchpoint\n\
13825 \tlongjmp - internal breakpoint used to step through longjmp()\n\
13826 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
13827 \tuntil - internal breakpoint used by the \"until\" command\n\
13828 \tfinish - internal breakpoint used by the \"finish\" command\n\
13829 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
13830 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
13831 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
13832 address and file/line number respectively.\n\
13834 Convenience variable \"$_\" and default examine address for \"x\"\n\
13835 are set to the address of the last breakpoint listed unless the command\n\
13836 is prefixed with \"server \".\n\n\
13837 Convenience variable \"$bpnum\" contains the number of the last\n\
13839 &maintenanceinfolist
);
13841 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
13842 Set catchpoints to catch events."),
13843 &catch_cmdlist
, "catch ",
13844 0/*allow-unknown*/, &cmdlist
);
13846 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
13847 Set temporary catchpoints to catch events."),
13848 &tcatch_cmdlist
, "tcatch ",
13849 0/*allow-unknown*/, &cmdlist
);
13851 /* Add catch and tcatch sub-commands. */
13852 add_catch_command ("catch", _("\
13853 Catch an exception, when caught.\n\
13854 With an argument, catch only exceptions with the given name."),
13855 catch_catch_command
,
13859 add_catch_command ("throw", _("\
13860 Catch an exception, when thrown.\n\
13861 With an argument, catch only exceptions with the given name."),
13862 catch_throw_command
,
13866 add_catch_command ("fork", _("Catch calls to fork."),
13867 catch_fork_command_1
,
13869 (void *) (uintptr_t) catch_fork_permanent
,
13870 (void *) (uintptr_t) catch_fork_temporary
);
13871 add_catch_command ("vfork", _("Catch calls to vfork."),
13872 catch_fork_command_1
,
13874 (void *) (uintptr_t) catch_vfork_permanent
,
13875 (void *) (uintptr_t) catch_vfork_temporary
);
13876 add_catch_command ("exec", _("Catch calls to exec."),
13877 catch_exec_command_1
,
13881 add_catch_command ("syscall", _("\
13882 Catch system calls by their names and/or numbers.\n\
13883 Arguments say which system calls to catch. If no arguments\n\
13884 are given, every system call will be caught.\n\
13885 Arguments, if given, should be one or more system call names\n\
13886 (if your system supports that), or system call numbers."),
13887 catch_syscall_command_1
,
13888 catch_syscall_completer
,
13892 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
13893 Set a watchpoint for an expression.\n\
13894 Usage: watch [-l|-location] EXPRESSION\n\
13895 A watchpoint stops execution of your program whenever the value of\n\
13896 an expression changes.\n\
13897 If -l or -location is given, this evaluates EXPRESSION and watches\n\
13898 the memory to which it refers."));
13899 set_cmd_completer (c
, expression_completer
);
13901 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
13902 Set a read watchpoint for an expression.\n\
13903 Usage: rwatch [-l|-location] EXPRESSION\n\
13904 A watchpoint stops execution of your program whenever the value of\n\
13905 an expression is read.\n\
13906 If -l or -location is given, this evaluates EXPRESSION and watches\n\
13907 the memory to which it refers."));
13908 set_cmd_completer (c
, expression_completer
);
13910 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
13911 Set a watchpoint for an expression.\n\
13912 Usage: awatch [-l|-location] EXPRESSION\n\
13913 A watchpoint stops execution of your program whenever the value of\n\
13914 an expression is either read or written.\n\
13915 If -l or -location is given, this evaluates EXPRESSION and watches\n\
13916 the memory to which it refers."));
13917 set_cmd_completer (c
, expression_completer
);
13919 add_info ("watchpoints", watchpoints_info
, _("\
13920 Status of specified watchpoints (all watchpoints if no argument)."));
13922 /* XXX: cagney/2005-02-23: This should be a boolean, and should
13923 respond to changes - contrary to the description. */
13924 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
13925 &can_use_hw_watchpoints
, _("\
13926 Set debugger's willingness to use watchpoint hardware."), _("\
13927 Show debugger's willingness to use watchpoint hardware."), _("\
13928 If zero, gdb will not use hardware for new watchpoints, even if\n\
13929 such is available. (However, any hardware watchpoints that were\n\
13930 created before setting this to nonzero, will continue to use watchpoint\n\
13933 show_can_use_hw_watchpoints
,
13934 &setlist
, &showlist
);
13936 can_use_hw_watchpoints
= 1;
13938 /* Tracepoint manipulation commands. */
13940 c
= add_com ("trace", class_breakpoint
, trace_command
, _("\
13941 Set a tracepoint at specified line or function.\n\
13943 BREAK_ARGS_HELP ("trace") "\n\
13944 Do \"help tracepoints\" for info on other tracepoint commands."));
13945 set_cmd_completer (c
, location_completer
);
13947 add_com_alias ("tp", "trace", class_alias
, 0);
13948 add_com_alias ("tr", "trace", class_alias
, 1);
13949 add_com_alias ("tra", "trace", class_alias
, 1);
13950 add_com_alias ("trac", "trace", class_alias
, 1);
13952 c
= add_com ("ftrace", class_breakpoint
, ftrace_command
, _("\
13953 Set a fast tracepoint at specified line or function.\n\
13955 BREAK_ARGS_HELP ("ftrace") "\n\
13956 Do \"help tracepoints\" for info on other tracepoint commands."));
13957 set_cmd_completer (c
, location_completer
);
13959 c
= add_com ("strace", class_breakpoint
, strace_command
, _("\
13960 Set a static tracepoint at specified line, function or marker.\n\
13962 strace [LOCATION] [if CONDITION]\n\
13963 LOCATION may be a line number, function name, \"*\" and an address,\n\
13964 or -m MARKER_ID.\n\
13965 If a line number is specified, probe the marker at start of code\n\
13966 for that line. If a function is specified, probe the marker at start\n\
13967 of code for that function. If an address is specified, probe the marker\n\
13968 at that exact address. If a marker id is specified, probe the marker\n\
13969 with that name. With no LOCATION, uses current execution address of\n\
13970 the selected stack frame.\n\
13971 Static tracepoints accept an extra collect action -- ``collect $_sdata''.\n\
13972 This collects arbitrary user data passed in the probe point call to the\n\
13973 tracing library. You can inspect it when analyzing the trace buffer,\n\
13974 by printing the $_sdata variable like any other convenience variable.\n\
13976 CONDITION is a boolean expression.\n\
13978 Multiple tracepoints at one place are permitted, and useful if their\n\
13979 conditions are different.\n\
13981 Do \"help breakpoints\" for info on other commands dealing with breakpoints.\n\
13982 Do \"help tracepoints\" for info on other tracepoint commands."));
13983 set_cmd_completer (c
, location_completer
);
13985 add_info ("tracepoints", tracepoints_info
, _("\
13986 Status of specified tracepoints (all tracepoints if no argument).\n\
13987 Convenience variable \"$tpnum\" contains the number of the\n\
13988 last tracepoint set."));
13990 add_info_alias ("tp", "tracepoints", 1);
13992 add_cmd ("tracepoints", class_trace
, delete_trace_command
, _("\
13993 Delete specified tracepoints.\n\
13994 Arguments are tracepoint numbers, separated by spaces.\n\
13995 No argument means delete all tracepoints."),
13998 c
= add_cmd ("tracepoints", class_trace
, disable_trace_command
, _("\
13999 Disable specified tracepoints.\n\
14000 Arguments are tracepoint numbers, separated by spaces.\n\
14001 No argument means disable all tracepoints."),
14003 deprecate_cmd (c
, "disable");
14005 c
= add_cmd ("tracepoints", class_trace
, enable_trace_command
, _("\
14006 Enable specified tracepoints.\n\
14007 Arguments are tracepoint numbers, separated by spaces.\n\
14008 No argument means enable all tracepoints."),
14010 deprecate_cmd (c
, "enable");
14012 add_com ("passcount", class_trace
, trace_pass_command
, _("\
14013 Set the passcount for a tracepoint.\n\
14014 The trace will end when the tracepoint has been passed 'count' times.\n\
14015 Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
14016 if TPNUM is omitted, passcount refers to the last tracepoint defined."));
14018 add_prefix_cmd ("save", class_breakpoint
, save_command
,
14019 _("Save breakpoint definitions as a script."),
14020 &save_cmdlist
, "save ",
14021 0/*allow-unknown*/, &cmdlist
);
14023 c
= add_cmd ("breakpoints", class_breakpoint
, save_breakpoints_command
, _("\
14024 Save current breakpoint definitions as a script.\n\
14025 This includes all types of breakpoints (breakpoints, watchpoints,\n\
14026 catchpoints, tracepoints). Use the 'source' command in another debug\n\
14027 session to restore them."),
14029 set_cmd_completer (c
, filename_completer
);
14031 c
= add_cmd ("tracepoints", class_trace
, save_tracepoints_command
, _("\
14032 Save current tracepoint definitions as a script.\n\
14033 Use the 'source' command in another debug session to restore them."),
14035 set_cmd_completer (c
, filename_completer
);
14037 c
= add_com_alias ("save-tracepoints", "save tracepoints", class_trace
, 0);
14038 deprecate_cmd (c
, "save tracepoints");
14040 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
14041 Breakpoint specific settings\n\
14042 Configure various breakpoint-specific variables such as\n\
14043 pending breakpoint behavior"),
14044 &breakpoint_set_cmdlist
, "set breakpoint ",
14045 0/*allow-unknown*/, &setlist
);
14046 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
14047 Breakpoint specific settings\n\
14048 Configure various breakpoint-specific variables such as\n\
14049 pending breakpoint behavior"),
14050 &breakpoint_show_cmdlist
, "show breakpoint ",
14051 0/*allow-unknown*/, &showlist
);
14053 add_setshow_auto_boolean_cmd ("pending", no_class
,
14054 &pending_break_support
, _("\
14055 Set debugger's behavior regarding pending breakpoints."), _("\
14056 Show debugger's behavior regarding pending breakpoints."), _("\
14057 If on, an unrecognized breakpoint location will cause gdb to create a\n\
14058 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
14059 an error. If auto, an unrecognized breakpoint location results in a\n\
14060 user-query to see if a pending breakpoint should be created."),
14062 show_pending_break_support
,
14063 &breakpoint_set_cmdlist
,
14064 &breakpoint_show_cmdlist
);
14066 pending_break_support
= AUTO_BOOLEAN_AUTO
;
14068 add_setshow_boolean_cmd ("auto-hw", no_class
,
14069 &automatic_hardware_breakpoints
, _("\
14070 Set automatic usage of hardware breakpoints."), _("\
14071 Show automatic usage of hardware breakpoints."), _("\
14072 If set, the debugger will automatically use hardware breakpoints for\n\
14073 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
14074 a warning will be emitted for such breakpoints."),
14076 show_automatic_hardware_breakpoints
,
14077 &breakpoint_set_cmdlist
,
14078 &breakpoint_show_cmdlist
);
14080 add_setshow_enum_cmd ("always-inserted", class_support
,
14081 always_inserted_enums
, &always_inserted_mode
, _("\
14082 Set mode for inserting breakpoints."), _("\
14083 Show mode for inserting breakpoints."), _("\
14084 When this mode is off, breakpoints are inserted in inferior when it is\n\
14085 resumed, and removed when execution stops. When this mode is on,\n\
14086 breakpoints are inserted immediately and removed only when the user\n\
14087 deletes the breakpoint. When this mode is auto (which is the default),\n\
14088 the behaviour depends on the non-stop setting (see help set non-stop).\n\
14089 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
14090 behaves as if always-inserted mode is on; if gdb is controlling the\n\
14091 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
14093 &show_always_inserted_mode
,
14094 &breakpoint_set_cmdlist
,
14095 &breakpoint_show_cmdlist
);
14097 add_com ("break-range", class_breakpoint
, break_range_command
, _("\
14098 Set a breakpoint for an address range.\n\
14099 break-range START-LOCATION, END-LOCATION\n\
14100 where START-LOCATION and END-LOCATION can be one of the following:\n\
14101 LINENUM, for that line in the current file,\n\
14102 FILE:LINENUM, for that line in that file,\n\
14103 +OFFSET, for that number of lines after the current line\n\
14104 or the start of the range\n\
14105 FUNCTION, for the first line in that function,\n\
14106 FILE:FUNCTION, to distinguish among like-named static functions.\n\
14107 *ADDRESS, for the instruction at that address.\n\
14109 The breakpoint will stop execution of the inferior whenever it executes\n\
14110 an instruction at any address within the [START-LOCATION, END-LOCATION]\n\
14111 range (including START-LOCATION and END-LOCATION)."));
14113 automatic_hardware_breakpoints
= 1;
14115 observer_attach_about_to_proceed (breakpoint_about_to_proceed
);