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
*brk
;
7208 gdb_byte
*target_mem
;
7209 struct cleanup
*cleanup
;
7212 gdb_assert (loc
!= NULL
);
7214 addr
= loc
->address
;
7215 brk
= 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
, brk
, 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 lsal
.canonical
= xstrdup (copy_arg
);
7736 VEC_safe_push (linespec_sals
, canonical
.sals
, &lsal
);
7741 TRY_CATCH (e
, RETURN_MASK_ALL
)
7743 parse_breakpoint_sals (&arg
, &canonical
);
7746 /* If caller is interested in rc value from parse, set value. */
7750 throw_exception (e
);
7754 case NOT_FOUND_ERROR
:
7756 /* If pending breakpoint support is turned off, throw
7759 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
7760 throw_exception (e
);
7762 exception_print (gdb_stderr
, e
);
7764 /* If pending breakpoint support is auto query and the user
7765 selects no, then simply return the error code. */
7766 if (pending_break_support
== AUTO_BOOLEAN_AUTO
7767 && !nquery (_("Make %s pending on future shared library load? "),
7768 bptype_string (type_wanted
)))
7771 /* At this point, either the user was queried about setting
7772 a pending breakpoint and selected yes, or pending
7773 breakpoint behavior is on and thus a pending breakpoint
7774 is defaulted on behalf of the user. */
7776 struct linespec_sals lsal
;
7778 copy_arg
= xstrdup (addr_start
);
7779 lsal
.canonical
= xstrdup (copy_arg
);
7780 lsal
.sals
.nelts
= 1;
7781 lsal
.sals
.sals
= XNEW (struct symtab_and_line
);
7782 init_sal (&lsal
.sals
.sals
[0]);
7784 VEC_safe_push (linespec_sals
, canonical
.sals
, &lsal
);
7788 throw_exception (e
);
7792 if (VEC_empty (linespec_sals
, canonical
.sals
))
7798 /* Create a chain of things that always need to be cleaned up. */
7799 old_chain
= make_cleanup_destroy_linespec_result (&canonical
);
7801 /* ----------------------------- SNIP -----------------------------
7802 Anything added to the cleanup chain beyond this point is assumed
7803 to be part of a breakpoint. If the breakpoint create succeeds
7804 then the memory is not reclaimed. */
7805 bkpt_chain
= make_cleanup (null_cleanup
, 0);
7807 /* Resolve all line numbers to PC's and verify that the addresses
7808 are ok for the target. */
7812 struct linespec_sals
*iter
;
7814 for (ix
= 0; VEC_iterate (linespec_sals
, canonical
.sals
, ix
, iter
); ++ix
)
7815 breakpoint_sals_to_pc (&iter
->sals
);
7818 /* Fast tracepoints may have additional restrictions on location. */
7819 if (!pending
&& type_wanted
== bp_fast_tracepoint
)
7822 struct linespec_sals
*iter
;
7824 for (ix
= 0; VEC_iterate (linespec_sals
, canonical
.sals
, ix
, iter
); ++ix
)
7825 check_fast_tracepoint_sals (gdbarch
, &iter
->sals
);
7828 /* Verify that condition can be parsed, before setting any
7829 breakpoints. Allocate a separate condition expression for each
7833 struct linespec_sals
*lsal
;
7835 lsal
= VEC_index (linespec_sals
, canonical
.sals
, 0);
7837 if (parse_condition_and_thread
)
7839 /* Here we only parse 'arg' to separate condition
7840 from thread number, so parsing in context of first
7841 sal is OK. When setting the breakpoint we'll
7842 re-parse it in context of each sal. */
7845 find_condition_and_thread (arg
, lsal
->sals
.sals
[0].pc
, &cond_string
,
7848 make_cleanup (xfree
, cond_string
);
7852 /* Create a private copy of condition string. */
7855 cond_string
= xstrdup (cond_string
);
7856 make_cleanup (xfree
, cond_string
);
7860 /* If the user is creating a static tracepoint by marker id
7861 (strace -m MARKER_ID), then store the sals index, so that
7862 breakpoint_re_set can try to match up which of the newly
7863 found markers corresponds to this one, and, don't try to
7864 expand multiple locations for each sal, given than SALS
7865 already should contain all sals for MARKER_ID. */
7866 if (type_wanted
== bp_static_tracepoint
7867 && is_marker_spec (copy_arg
))
7871 for (i
= 0; i
< lsal
->sals
.nelts
; ++i
)
7873 struct symtabs_and_lines expanded
;
7874 struct tracepoint
*tp
;
7875 struct cleanup
*old_chain
;
7879 expanded
.sals
= &lsal
->sals
.sals
[i
];
7881 addr_string
= xstrdup (canonical
.addr_string
);
7882 old_chain
= make_cleanup (xfree
, addr_string
);
7884 tp
= XCNEW (struct tracepoint
);
7885 init_breakpoint_sal (&tp
->base
, gdbarch
, expanded
,
7887 cond_string
, type_wanted
,
7888 tempflag
? disp_del
: disp_donttouch
,
7889 thread
, task
, ignore_count
, ops
,
7890 from_tty
, enabled
, internal
,
7891 canonical
.special_display
);
7892 /* Given that its possible to have multiple markers with
7893 the same string id, if the user is creating a static
7894 tracepoint by marker id ("strace -m MARKER_ID"), then
7895 store the sals index, so that breakpoint_re_set can
7896 try to match up which of the newly found markers
7897 corresponds to this one */
7898 tp
->static_trace_marker_id_idx
= i
;
7900 install_breakpoint (internal
, &tp
->base
, 0);
7902 discard_cleanups (old_chain
);
7906 create_breakpoints_sal (gdbarch
, &canonical
, cond_string
,
7908 tempflag
? disp_del
: disp_donttouch
,
7909 thread
, task
, ignore_count
, ops
, from_tty
,
7914 struct breakpoint
*b
;
7916 make_cleanup (xfree
, copy_arg
);
7918 if (is_tracepoint_type (type_wanted
))
7920 struct tracepoint
*t
;
7922 t
= XCNEW (struct tracepoint
);
7926 b
= XNEW (struct breakpoint
);
7928 init_raw_breakpoint_without_location (b
, gdbarch
, type_wanted
, ops
);
7930 b
->addr_string
= copy_arg
;
7931 b
->cond_string
= NULL
;
7932 b
->ignore_count
= ignore_count
;
7933 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
7934 b
->condition_not_parsed
= 1;
7935 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
7936 if (type_wanted
!= bp_breakpoint
&& type_wanted
!= bp_hardware_breakpoint
)
7937 b
->pspace
= current_program_space
;
7939 install_breakpoint (internal
, b
, 0);
7942 if (VEC_length (linespec_sals
, canonical
.sals
) > 1)
7944 warning (_("Multiple breakpoints were set.\nUse the "
7945 "\"delete\" command to delete unwanted breakpoints."));
7946 prev_breakpoint_count
= prev_bkpt_count
;
7949 /* That's it. Discard the cleanups for data inserted into the
7951 discard_cleanups (bkpt_chain
);
7952 /* But cleanup everything else. */
7953 do_cleanups (old_chain
);
7955 /* error call may happen here - have BKPT_CHAIN already discarded. */
7956 update_global_location_list (1);
7961 /* Set a breakpoint.
7962 ARG is a string describing breakpoint address,
7963 condition, and thread.
7964 FLAG specifies if a breakpoint is hardware on,
7965 and if breakpoint is temporary, using BP_HARDWARE_FLAG
7969 break_command_1 (char *arg
, int flag
, int from_tty
)
7971 int tempflag
= flag
& BP_TEMPFLAG
;
7972 enum bptype type_wanted
= (flag
& BP_HARDWAREFLAG
7973 ? bp_hardware_breakpoint
7976 create_breakpoint (get_current_arch (),
7978 NULL
, 0, 1 /* parse arg */,
7979 tempflag
, type_wanted
,
7980 0 /* Ignore count */,
7981 pending_break_support
,
7982 &bkpt_breakpoint_ops
,
7988 /* Helper function for break_command_1 and disassemble_command. */
7991 resolve_sal_pc (struct symtab_and_line
*sal
)
7995 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
7997 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
7998 error (_("No line %d in file \"%s\"."),
7999 sal
->line
, sal
->symtab
->filename
);
8002 /* If this SAL corresponds to a breakpoint inserted using a line
8003 number, then skip the function prologue if necessary. */
8004 if (sal
->explicit_line
)
8005 skip_prologue_sal (sal
);
8008 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
8010 struct blockvector
*bv
;
8014 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
8017 sym
= block_linkage_function (b
);
8020 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
8021 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
8025 /* It really is worthwhile to have the section, so we'll
8026 just have to look harder. This case can be executed
8027 if we have line numbers but no functions (as can
8028 happen in assembly source). */
8030 struct minimal_symbol
*msym
;
8031 struct cleanup
*old_chain
= save_current_space_and_thread ();
8033 switch_to_program_space_and_thread (sal
->pspace
);
8035 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
8037 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
8039 do_cleanups (old_chain
);
8046 break_command (char *arg
, int from_tty
)
8048 break_command_1 (arg
, 0, from_tty
);
8052 tbreak_command (char *arg
, int from_tty
)
8054 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
8058 hbreak_command (char *arg
, int from_tty
)
8060 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
8064 thbreak_command (char *arg
, int from_tty
)
8066 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
8070 stop_command (char *arg
, int from_tty
)
8072 printf_filtered (_("Specify the type of breakpoint to set.\n\
8073 Usage: stop in <function | address>\n\
8074 stop at <line>\n"));
8078 stopin_command (char *arg
, int from_tty
)
8082 if (arg
== (char *) NULL
)
8084 else if (*arg
!= '*')
8089 /* Look for a ':'. If this is a line number specification, then
8090 say it is bad, otherwise, it should be an address or
8091 function/method name. */
8092 while (*argptr
&& !hasColon
)
8094 hasColon
= (*argptr
== ':');
8099 badInput
= (*argptr
!= ':'); /* Not a class::method */
8101 badInput
= isdigit (*arg
); /* a simple line number */
8105 printf_filtered (_("Usage: stop in <function | address>\n"));
8107 break_command_1 (arg
, 0, from_tty
);
8111 stopat_command (char *arg
, int from_tty
)
8115 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
8122 /* Look for a ':'. If there is a '::' then get out, otherwise
8123 it is probably a line number. */
8124 while (*argptr
&& !hasColon
)
8126 hasColon
= (*argptr
== ':');
8131 badInput
= (*argptr
== ':'); /* we have class::method */
8133 badInput
= !isdigit (*arg
); /* not a line number */
8137 printf_filtered (_("Usage: stop at <line>\n"));
8139 break_command_1 (arg
, 0, from_tty
);
8142 /* Implement the "breakpoint_hit" breakpoint_ops method for
8143 ranged breakpoints. */
8146 breakpoint_hit_ranged_breakpoint (const struct bp_location
*bl
,
8147 struct address_space
*aspace
,
8150 return breakpoint_address_match_range (bl
->pspace
->aspace
, bl
->address
,
8151 bl
->length
, aspace
, bp_addr
);
8154 /* Implement the "resources_needed" breakpoint_ops method for
8155 ranged breakpoints. */
8158 resources_needed_ranged_breakpoint (const struct bp_location
*bl
)
8160 return target_ranged_break_num_registers ();
8163 /* Implement the "print_it" breakpoint_ops method for
8164 ranged breakpoints. */
8166 static enum print_stop_action
8167 print_it_ranged_breakpoint (bpstat bs
)
8169 struct breakpoint
*b
= bs
->breakpoint_at
;
8170 struct bp_location
*bl
= b
->loc
;
8171 struct ui_out
*uiout
= current_uiout
;
8173 gdb_assert (b
->type
== bp_hardware_breakpoint
);
8175 /* Ranged breakpoints have only one location. */
8176 gdb_assert (bl
&& bl
->next
== NULL
);
8178 annotate_breakpoint (b
->number
);
8179 if (b
->disposition
== disp_del
)
8180 ui_out_text (uiout
, "\nTemporary ranged breakpoint ");
8182 ui_out_text (uiout
, "\nRanged breakpoint ");
8183 if (ui_out_is_mi_like_p (uiout
))
8185 ui_out_field_string (uiout
, "reason",
8186 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
8187 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
8189 ui_out_field_int (uiout
, "bkptno", b
->number
);
8190 ui_out_text (uiout
, ", ");
8192 return PRINT_SRC_AND_LOC
;
8195 /* Implement the "print_one" breakpoint_ops method for
8196 ranged breakpoints. */
8199 print_one_ranged_breakpoint (struct breakpoint
*b
,
8200 struct bp_location
**last_loc
)
8202 struct bp_location
*bl
= b
->loc
;
8203 struct value_print_options opts
;
8204 struct ui_out
*uiout
= current_uiout
;
8206 /* Ranged breakpoints have only one location. */
8207 gdb_assert (bl
&& bl
->next
== NULL
);
8209 get_user_print_options (&opts
);
8211 if (opts
.addressprint
)
8212 /* We don't print the address range here, it will be printed later
8213 by print_one_detail_ranged_breakpoint. */
8214 ui_out_field_skip (uiout
, "addr");
8216 print_breakpoint_location (b
, bl
);
8220 /* Implement the "print_one_detail" breakpoint_ops method for
8221 ranged breakpoints. */
8224 print_one_detail_ranged_breakpoint (const struct breakpoint
*b
,
8225 struct ui_out
*uiout
)
8227 CORE_ADDR address_start
, address_end
;
8228 struct bp_location
*bl
= b
->loc
;
8229 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
8230 struct cleanup
*cleanup
= make_cleanup_ui_out_stream_delete (stb
);
8234 address_start
= bl
->address
;
8235 address_end
= address_start
+ bl
->length
- 1;
8237 ui_out_text (uiout
, "\taddress range: ");
8238 fprintf_unfiltered (stb
->stream
, "[%s, %s]",
8239 print_core_address (bl
->gdbarch
, address_start
),
8240 print_core_address (bl
->gdbarch
, address_end
));
8241 ui_out_field_stream (uiout
, "addr", stb
);
8242 ui_out_text (uiout
, "\n");
8244 do_cleanups (cleanup
);
8247 /* Implement the "print_mention" breakpoint_ops method for
8248 ranged breakpoints. */
8251 print_mention_ranged_breakpoint (struct breakpoint
*b
)
8253 struct bp_location
*bl
= b
->loc
;
8254 struct ui_out
*uiout
= current_uiout
;
8257 gdb_assert (b
->type
== bp_hardware_breakpoint
);
8259 if (ui_out_is_mi_like_p (uiout
))
8262 printf_filtered (_("Hardware assisted ranged breakpoint %d from %s to %s."),
8263 b
->number
, paddress (bl
->gdbarch
, bl
->address
),
8264 paddress (bl
->gdbarch
, bl
->address
+ bl
->length
- 1));
8267 /* Implement the "print_recreate" breakpoint_ops method for
8268 ranged breakpoints. */
8271 print_recreate_ranged_breakpoint (struct breakpoint
*b
, struct ui_file
*fp
)
8273 fprintf_unfiltered (fp
, "break-range %s, %s", b
->addr_string
,
8274 b
->addr_string_range_end
);
8275 print_recreate_thread (b
, fp
);
8278 /* The breakpoint_ops structure to be used in ranged breakpoints. */
8280 static struct breakpoint_ops ranged_breakpoint_ops
;
8282 /* Find the address where the end of the breakpoint range should be
8283 placed, given the SAL of the end of the range. This is so that if
8284 the user provides a line number, the end of the range is set to the
8285 last instruction of the given line. */
8288 find_breakpoint_range_end (struct symtab_and_line sal
)
8292 /* If the user provided a PC value, use it. Otherwise,
8293 find the address of the end of the given location. */
8294 if (sal
.explicit_pc
)
8301 ret
= find_line_pc_range (sal
, &start
, &end
);
8303 error (_("Could not find location of the end of the range."));
8305 /* find_line_pc_range returns the start of the next line. */
8312 /* Implement the "break-range" CLI command. */
8315 break_range_command (char *arg
, int from_tty
)
8317 char *arg_start
, *addr_string_start
, *addr_string_end
;
8318 struct linespec_result canonical_start
, canonical_end
;
8319 int bp_count
, can_use_bp
, length
;
8321 struct breakpoint
*b
;
8322 struct symtab_and_line sal_start
, sal_end
;
8323 struct cleanup
*cleanup_bkpt
;
8324 struct linespec_sals
*lsal_start
, *lsal_end
;
8326 /* We don't support software ranged breakpoints. */
8327 if (target_ranged_break_num_registers () < 0)
8328 error (_("This target does not support hardware ranged breakpoints."));
8330 bp_count
= hw_breakpoint_used_count ();
8331 bp_count
+= target_ranged_break_num_registers ();
8332 can_use_bp
= target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
8335 error (_("Hardware breakpoints used exceeds limit."));
8337 arg
= skip_spaces (arg
);
8338 if (arg
== NULL
|| arg
[0] == '\0')
8339 error(_("No address range specified."));
8341 init_linespec_result (&canonical_start
);
8344 parse_breakpoint_sals (&arg
, &canonical_start
);
8346 cleanup_bkpt
= make_cleanup_destroy_linespec_result (&canonical_start
);
8349 error (_("Too few arguments."));
8350 else if (VEC_empty (linespec_sals
, canonical_start
.sals
))
8351 error (_("Could not find location of the beginning of the range."));
8353 lsal_start
= VEC_index (linespec_sals
, canonical_start
.sals
, 0);
8355 if (VEC_length (linespec_sals
, canonical_start
.sals
) > 1
8356 || lsal_start
->sals
.nelts
!= 1)
8357 error (_("Cannot create a ranged breakpoint with multiple locations."));
8359 sal_start
= lsal_start
->sals
.sals
[0];
8360 addr_string_start
= savestring (arg_start
, arg
- arg_start
);
8361 make_cleanup (xfree
, addr_string_start
);
8363 arg
++; /* Skip the comma. */
8364 arg
= skip_spaces (arg
);
8366 /* Parse the end location. */
8368 init_linespec_result (&canonical_end
);
8371 /* We call decode_line_full directly here instead of using
8372 parse_breakpoint_sals because we need to specify the start location's
8373 symtab and line as the default symtab and line for the end of the
8374 range. This makes it possible to have ranges like "foo.c:27, +14",
8375 where +14 means 14 lines from the start location. */
8376 decode_line_full (&arg
, DECODE_LINE_FUNFIRSTLINE
,
8377 sal_start
.symtab
, sal_start
.line
,
8378 &canonical_end
, NULL
, NULL
);
8380 make_cleanup_destroy_linespec_result (&canonical_end
);
8382 if (VEC_empty (linespec_sals
, canonical_end
.sals
))
8383 error (_("Could not find location of the end of the range."));
8385 lsal_end
= VEC_index (linespec_sals
, canonical_end
.sals
, 0);
8386 if (VEC_length (linespec_sals
, canonical_end
.sals
) > 1
8387 || lsal_end
->sals
.nelts
!= 1)
8388 error (_("Cannot create a ranged breakpoint with multiple locations."));
8390 sal_end
= lsal_end
->sals
.sals
[0];
8391 addr_string_end
= savestring (arg_start
, arg
- arg_start
);
8392 make_cleanup (xfree
, addr_string_end
);
8394 end
= find_breakpoint_range_end (sal_end
);
8395 if (sal_start
.pc
> end
)
8396 error (_("Invalid address range, end precedes start."));
8398 length
= end
- sal_start
.pc
+ 1;
8400 /* Length overflowed. */
8401 error (_("Address range too large."));
8402 else if (length
== 1)
8404 /* This range is simple enough to be handled by
8405 the `hbreak' command. */
8406 hbreak_command (addr_string_start
, 1);
8408 do_cleanups (cleanup_bkpt
);
8413 /* Now set up the breakpoint. */
8414 b
= set_raw_breakpoint (get_current_arch (), sal_start
,
8415 bp_hardware_breakpoint
, &ranged_breakpoint_ops
);
8416 set_breakpoint_count (breakpoint_count
+ 1);
8417 b
->number
= breakpoint_count
;
8418 b
->disposition
= disp_donttouch
;
8419 b
->addr_string
= xstrdup (addr_string_start
);
8420 b
->addr_string_range_end
= xstrdup (addr_string_end
);
8421 b
->loc
->length
= length
;
8423 do_cleanups (cleanup_bkpt
);
8426 observer_notify_breakpoint_created (b
);
8427 update_global_location_list (1);
8430 /* Return non-zero if EXP is verified as constant. Returned zero
8431 means EXP is variable. Also the constant detection may fail for
8432 some constant expressions and in such case still falsely return
8435 watchpoint_exp_is_const (const struct expression
*exp
)
8443 /* We are only interested in the descriptor of each element. */
8444 operator_length (exp
, i
, &oplenp
, &argsp
);
8447 switch (exp
->elts
[i
].opcode
)
8457 case BINOP_LOGICAL_AND
:
8458 case BINOP_LOGICAL_OR
:
8459 case BINOP_BITWISE_AND
:
8460 case BINOP_BITWISE_IOR
:
8461 case BINOP_BITWISE_XOR
:
8463 case BINOP_NOTEQUAL
:
8479 case TERNOP_SLICE_COUNT
:
8491 case OP_OBJC_NSSTRING
:
8494 case UNOP_LOGICAL_NOT
:
8495 case UNOP_COMPLEMENT
:
8498 /* Unary, binary and ternary operators: We have to check
8499 their operands. If they are constant, then so is the
8500 result of that operation. For instance, if A and B are
8501 determined to be constants, then so is "A + B".
8503 UNOP_IND is one exception to the rule above, because the
8504 value of *ADDR is not necessarily a constant, even when
8509 /* Check whether the associated symbol is a constant.
8511 We use SYMBOL_CLASS rather than TYPE_CONST because it's
8512 possible that a buggy compiler could mark a variable as
8513 constant even when it is not, and TYPE_CONST would return
8514 true in this case, while SYMBOL_CLASS wouldn't.
8516 We also have to check for function symbols because they
8517 are always constant. */
8519 struct symbol
*s
= exp
->elts
[i
+ 2].symbol
;
8521 if (SYMBOL_CLASS (s
) != LOC_BLOCK
8522 && SYMBOL_CLASS (s
) != LOC_CONST
8523 && SYMBOL_CLASS (s
) != LOC_CONST_BYTES
)
8528 /* The default action is to return 0 because we are using
8529 the optimistic approach here: If we don't know something,
8530 then it is not a constant. */
8539 /* Implement the "dtor" breakpoint_ops method for watchpoints. */
8542 dtor_watchpoint (struct breakpoint
*self
)
8544 struct watchpoint
*w
= (struct watchpoint
*) self
;
8546 xfree (w
->cond_exp
);
8548 xfree (w
->exp_string
);
8549 xfree (w
->exp_string_reparse
);
8550 value_free (w
->val
);
8552 base_breakpoint_ops
.dtor (self
);
8555 /* Implement the "re_set" breakpoint_ops method for watchpoints. */
8558 re_set_watchpoint (struct breakpoint
*b
)
8560 struct watchpoint
*w
= (struct watchpoint
*) b
;
8562 /* Watchpoint can be either on expression using entirely global
8563 variables, or it can be on local variables.
8565 Watchpoints of the first kind are never auto-deleted, and even
8566 persist across program restarts. Since they can use variables
8567 from shared libraries, we need to reparse expression as libraries
8568 are loaded and unloaded.
8570 Watchpoints on local variables can also change meaning as result
8571 of solib event. For example, if a watchpoint uses both a local
8572 and a global variables in expression, it's a local watchpoint,
8573 but unloading of a shared library will make the expression
8574 invalid. This is not a very common use case, but we still
8575 re-evaluate expression, to avoid surprises to the user.
8577 Note that for local watchpoints, we re-evaluate it only if
8578 watchpoints frame id is still valid. If it's not, it means the
8579 watchpoint is out of scope and will be deleted soon. In fact,
8580 I'm not sure we'll ever be called in this case.
8582 If a local watchpoint's frame id is still valid, then
8583 w->exp_valid_block is likewise valid, and we can safely use it.
8585 Don't do anything about disabled watchpoints, since they will be
8586 reevaluated again when enabled. */
8587 update_watchpoint (w
, 1 /* reparse */);
8590 /* Implement the "insert" breakpoint_ops method for hardware watchpoints. */
8593 insert_watchpoint (struct bp_location
*bl
)
8595 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8596 int length
= w
->exact
? 1 : bl
->length
;
8598 return target_insert_watchpoint (bl
->address
, length
, bl
->watchpoint_type
,
8602 /* Implement the "remove" breakpoint_ops method for hardware watchpoints. */
8605 remove_watchpoint (struct bp_location
*bl
)
8607 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8608 int length
= w
->exact
? 1 : bl
->length
;
8610 return target_remove_watchpoint (bl
->address
, length
, bl
->watchpoint_type
,
8615 breakpoint_hit_watchpoint (const struct bp_location
*bl
,
8616 struct address_space
*aspace
, CORE_ADDR bp_addr
)
8618 struct breakpoint
*b
= bl
->owner
;
8619 struct watchpoint
*w
= (struct watchpoint
*) b
;
8621 /* Continuable hardware watchpoints are treated as non-existent if the
8622 reason we stopped wasn't a hardware watchpoint (we didn't stop on
8623 some data address). Otherwise gdb won't stop on a break instruction
8624 in the code (not from a breakpoint) when a hardware watchpoint has
8625 been defined. Also skip watchpoints which we know did not trigger
8626 (did not match the data address). */
8627 if (is_hardware_watchpoint (b
)
8628 && w
->watchpoint_triggered
== watch_triggered_no
)
8635 check_status_watchpoint (bpstat bs
)
8637 gdb_assert (is_watchpoint (bs
->breakpoint_at
));
8639 bpstat_check_watchpoint (bs
);
8642 /* Implement the "resources_needed" breakpoint_ops method for
8643 hardware watchpoints. */
8646 resources_needed_watchpoint (const struct bp_location
*bl
)
8648 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8649 int length
= w
->exact
? 1 : bl
->length
;
8651 return target_region_ok_for_hw_watchpoint (bl
->address
, length
);
8654 /* Implement the "works_in_software_mode" breakpoint_ops method for
8655 hardware watchpoints. */
8658 works_in_software_mode_watchpoint (const struct breakpoint
*b
)
8660 /* Read and access watchpoints only work with hardware support. */
8661 return b
->type
== bp_watchpoint
|| b
->type
== bp_hardware_watchpoint
;
8664 static enum print_stop_action
8665 print_it_watchpoint (bpstat bs
)
8667 struct cleanup
*old_chain
;
8668 struct breakpoint
*b
;
8669 const struct bp_location
*bl
;
8670 struct ui_stream
*stb
;
8671 enum print_stop_action result
;
8672 struct watchpoint
*w
;
8673 struct ui_out
*uiout
= current_uiout
;
8675 gdb_assert (bs
->bp_location_at
!= NULL
);
8677 bl
= bs
->bp_location_at
;
8678 b
= bs
->breakpoint_at
;
8679 w
= (struct watchpoint
*) b
;
8681 stb
= ui_out_stream_new (uiout
);
8682 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
8687 case bp_hardware_watchpoint
:
8688 annotate_watchpoint (b
->number
);
8689 if (ui_out_is_mi_like_p (uiout
))
8692 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
8694 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
8695 ui_out_text (uiout
, "\nOld value = ");
8696 watchpoint_value_print (bs
->old_val
, stb
->stream
);
8697 ui_out_field_stream (uiout
, "old", stb
);
8698 ui_out_text (uiout
, "\nNew value = ");
8699 watchpoint_value_print (w
->val
, stb
->stream
);
8700 ui_out_field_stream (uiout
, "new", stb
);
8701 ui_out_text (uiout
, "\n");
8702 /* More than one watchpoint may have been triggered. */
8703 result
= PRINT_UNKNOWN
;
8706 case bp_read_watchpoint
:
8707 if (ui_out_is_mi_like_p (uiout
))
8710 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
8712 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
8713 ui_out_text (uiout
, "\nValue = ");
8714 watchpoint_value_print (w
->val
, stb
->stream
);
8715 ui_out_field_stream (uiout
, "value", stb
);
8716 ui_out_text (uiout
, "\n");
8717 result
= PRINT_UNKNOWN
;
8720 case bp_access_watchpoint
:
8721 if (bs
->old_val
!= NULL
)
8723 annotate_watchpoint (b
->number
);
8724 if (ui_out_is_mi_like_p (uiout
))
8727 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
8729 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
8730 ui_out_text (uiout
, "\nOld value = ");
8731 watchpoint_value_print (bs
->old_val
, stb
->stream
);
8732 ui_out_field_stream (uiout
, "old", stb
);
8733 ui_out_text (uiout
, "\nNew value = ");
8738 if (ui_out_is_mi_like_p (uiout
))
8741 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
8742 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
8743 ui_out_text (uiout
, "\nValue = ");
8745 watchpoint_value_print (w
->val
, stb
->stream
);
8746 ui_out_field_stream (uiout
, "new", stb
);
8747 ui_out_text (uiout
, "\n");
8748 result
= PRINT_UNKNOWN
;
8751 result
= PRINT_UNKNOWN
;
8754 do_cleanups (old_chain
);
8758 /* Implement the "print_mention" breakpoint_ops method for hardware
8762 print_mention_watchpoint (struct breakpoint
*b
)
8764 struct cleanup
*ui_out_chain
;
8765 struct watchpoint
*w
= (struct watchpoint
*) b
;
8766 struct ui_out
*uiout
= current_uiout
;
8771 ui_out_text (uiout
, "Watchpoint ");
8772 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
8774 case bp_hardware_watchpoint
:
8775 ui_out_text (uiout
, "Hardware watchpoint ");
8776 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
8778 case bp_read_watchpoint
:
8779 ui_out_text (uiout
, "Hardware read watchpoint ");
8780 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
8782 case bp_access_watchpoint
:
8783 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
8784 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
8787 internal_error (__FILE__
, __LINE__
,
8788 _("Invalid hardware watchpoint type."));
8791 ui_out_field_int (uiout
, "number", b
->number
);
8792 ui_out_text (uiout
, ": ");
8793 ui_out_field_string (uiout
, "exp", w
->exp_string
);
8794 do_cleanups (ui_out_chain
);
8797 /* Implement the "print_recreate" breakpoint_ops method for
8801 print_recreate_watchpoint (struct breakpoint
*b
, struct ui_file
*fp
)
8803 struct watchpoint
*w
= (struct watchpoint
*) b
;
8808 case bp_hardware_watchpoint
:
8809 fprintf_unfiltered (fp
, "watch");
8811 case bp_read_watchpoint
:
8812 fprintf_unfiltered (fp
, "rwatch");
8814 case bp_access_watchpoint
:
8815 fprintf_unfiltered (fp
, "awatch");
8818 internal_error (__FILE__
, __LINE__
,
8819 _("Invalid watchpoint type."));
8822 fprintf_unfiltered (fp
, " %s", w
->exp_string
);
8823 print_recreate_thread (b
, fp
);
8826 /* The breakpoint_ops structure to be used in hardware watchpoints. */
8828 static struct breakpoint_ops watchpoint_breakpoint_ops
;
8830 /* Implement the "insert" breakpoint_ops method for
8831 masked hardware watchpoints. */
8834 insert_masked_watchpoint (struct bp_location
*bl
)
8836 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8838 return target_insert_mask_watchpoint (bl
->address
, w
->hw_wp_mask
,
8839 bl
->watchpoint_type
);
8842 /* Implement the "remove" breakpoint_ops method for
8843 masked hardware watchpoints. */
8846 remove_masked_watchpoint (struct bp_location
*bl
)
8848 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8850 return target_remove_mask_watchpoint (bl
->address
, w
->hw_wp_mask
,
8851 bl
->watchpoint_type
);
8854 /* Implement the "resources_needed" breakpoint_ops method for
8855 masked hardware watchpoints. */
8858 resources_needed_masked_watchpoint (const struct bp_location
*bl
)
8860 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
8862 return target_masked_watch_num_registers (bl
->address
, w
->hw_wp_mask
);
8865 /* Implement the "works_in_software_mode" breakpoint_ops method for
8866 masked hardware watchpoints. */
8869 works_in_software_mode_masked_watchpoint (const struct breakpoint
*b
)
8874 /* Implement the "print_it" breakpoint_ops method for
8875 masked hardware watchpoints. */
8877 static enum print_stop_action
8878 print_it_masked_watchpoint (bpstat bs
)
8880 struct breakpoint
*b
= bs
->breakpoint_at
;
8881 struct ui_out
*uiout
= current_uiout
;
8883 /* Masked watchpoints have only one location. */
8884 gdb_assert (b
->loc
&& b
->loc
->next
== NULL
);
8888 case bp_hardware_watchpoint
:
8889 annotate_watchpoint (b
->number
);
8890 if (ui_out_is_mi_like_p (uiout
))
8893 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
8896 case bp_read_watchpoint
:
8897 if (ui_out_is_mi_like_p (uiout
))
8900 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
8903 case bp_access_watchpoint
:
8904 if (ui_out_is_mi_like_p (uiout
))
8907 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
8910 internal_error (__FILE__
, __LINE__
,
8911 _("Invalid hardware watchpoint type."));
8915 ui_out_text (uiout
, _("\n\
8916 Check the underlying instruction at PC for the memory\n\
8917 address and value which triggered this watchpoint.\n"));
8918 ui_out_text (uiout
, "\n");
8920 /* More than one watchpoint may have been triggered. */
8921 return PRINT_UNKNOWN
;
8924 /* Implement the "print_one_detail" breakpoint_ops method for
8925 masked hardware watchpoints. */
8928 print_one_detail_masked_watchpoint (const struct breakpoint
*b
,
8929 struct ui_out
*uiout
)
8931 struct watchpoint
*w
= (struct watchpoint
*) b
;
8933 /* Masked watchpoints have only one location. */
8934 gdb_assert (b
->loc
&& b
->loc
->next
== NULL
);
8936 ui_out_text (uiout
, "\tmask ");
8937 ui_out_field_core_addr (uiout
, "mask", b
->loc
->gdbarch
, w
->hw_wp_mask
);
8938 ui_out_text (uiout
, "\n");
8941 /* Implement the "print_mention" breakpoint_ops method for
8942 masked hardware watchpoints. */
8945 print_mention_masked_watchpoint (struct breakpoint
*b
)
8947 struct watchpoint
*w
= (struct watchpoint
*) b
;
8948 struct ui_out
*uiout
= current_uiout
;
8949 struct cleanup
*ui_out_chain
;
8953 case bp_hardware_watchpoint
:
8954 ui_out_text (uiout
, "Masked hardware watchpoint ");
8955 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
8957 case bp_read_watchpoint
:
8958 ui_out_text (uiout
, "Masked hardware read watchpoint ");
8959 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
8961 case bp_access_watchpoint
:
8962 ui_out_text (uiout
, "Masked hardware access (read/write) watchpoint ");
8963 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
8966 internal_error (__FILE__
, __LINE__
,
8967 _("Invalid hardware watchpoint type."));
8970 ui_out_field_int (uiout
, "number", b
->number
);
8971 ui_out_text (uiout
, ": ");
8972 ui_out_field_string (uiout
, "exp", w
->exp_string
);
8973 do_cleanups (ui_out_chain
);
8976 /* Implement the "print_recreate" breakpoint_ops method for
8977 masked hardware watchpoints. */
8980 print_recreate_masked_watchpoint (struct breakpoint
*b
, struct ui_file
*fp
)
8982 struct watchpoint
*w
= (struct watchpoint
*) b
;
8987 case bp_hardware_watchpoint
:
8988 fprintf_unfiltered (fp
, "watch");
8990 case bp_read_watchpoint
:
8991 fprintf_unfiltered (fp
, "rwatch");
8993 case bp_access_watchpoint
:
8994 fprintf_unfiltered (fp
, "awatch");
8997 internal_error (__FILE__
, __LINE__
,
8998 _("Invalid hardware watchpoint type."));
9001 sprintf_vma (tmp
, w
->hw_wp_mask
);
9002 fprintf_unfiltered (fp
, " %s mask 0x%s", w
->exp_string
, tmp
);
9003 print_recreate_thread (b
, fp
);
9006 /* The breakpoint_ops structure to be used in masked hardware watchpoints. */
9008 static struct breakpoint_ops masked_watchpoint_breakpoint_ops
;
9010 /* Tell whether the given watchpoint is a masked hardware watchpoint. */
9013 is_masked_watchpoint (const struct breakpoint
*b
)
9015 return b
->ops
== &masked_watchpoint_breakpoint_ops
;
9018 /* accessflag: hw_write: watch write,
9019 hw_read: watch read,
9020 hw_access: watch access (read or write) */
9022 watch_command_1 (char *arg
, int accessflag
, int from_tty
,
9023 int just_location
, int internal
)
9025 volatile struct gdb_exception e
;
9026 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
9027 struct expression
*exp
;
9028 struct block
*exp_valid_block
= NULL
, *cond_exp_valid_block
= NULL
;
9029 struct value
*val
, *mark
, *result
;
9030 struct frame_info
*frame
;
9031 char *exp_start
= NULL
;
9032 char *exp_end
= NULL
;
9033 char *tok
, *end_tok
;
9035 char *cond_start
= NULL
;
9036 char *cond_end
= NULL
;
9037 enum bptype bp_type
;
9040 /* Flag to indicate whether we are going to use masks for
9041 the hardware watchpoint. */
9044 struct watchpoint
*w
;
9046 /* Make sure that we actually have parameters to parse. */
9047 if (arg
!= NULL
&& arg
[0] != '\0')
9051 /* Look for "parameter value" pairs at the end
9052 of the arguments string. */
9053 for (tok
= arg
+ strlen (arg
) - 1; tok
> arg
; tok
--)
9055 /* Skip whitespace at the end of the argument list. */
9056 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
9059 /* Find the beginning of the last token.
9060 This is the value of the parameter. */
9061 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
9063 value_start
= tok
+ 1;
9065 /* Skip whitespace. */
9066 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
9071 /* Find the beginning of the second to last token.
9072 This is the parameter itself. */
9073 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
9076 toklen
= end_tok
- tok
+ 1;
9078 if (toklen
== 6 && !strncmp (tok
, "thread", 6))
9080 /* At this point we've found a "thread" token, which means
9081 the user is trying to set a watchpoint that triggers
9082 only in a specific thread. */
9086 error(_("You can specify only one thread."));
9088 /* Extract the thread ID from the next token. */
9089 thread
= strtol (value_start
, &endp
, 0);
9091 /* Check if the user provided a valid numeric value for the
9093 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
9094 error (_("Invalid thread ID specification %s."), value_start
);
9096 /* Check if the thread actually exists. */
9097 if (!valid_thread_id (thread
))
9098 error (_("Unknown thread %d."), thread
);
9100 else if (toklen
== 4 && !strncmp (tok
, "mask", 4))
9102 /* We've found a "mask" token, which means the user wants to
9103 create a hardware watchpoint that is going to have the mask
9105 struct value
*mask_value
, *mark
;
9108 error(_("You can specify only one mask."));
9110 use_mask
= just_location
= 1;
9112 mark
= value_mark ();
9113 mask_value
= parse_to_comma_and_eval (&value_start
);
9114 mask
= value_as_address (mask_value
);
9115 value_free_to_mark (mark
);
9118 /* We didn't recognize what we found. We should stop here. */
9121 /* Truncate the string and get rid of the "parameter value" pair before
9122 the arguments string is parsed by the parse_exp_1 function. */
9127 /* Parse the rest of the arguments. */
9128 innermost_block
= NULL
;
9130 exp
= parse_exp_1 (&arg
, 0, 0);
9132 /* Remove trailing whitespace from the expression before saving it.
9133 This makes the eventual display of the expression string a bit
9135 while (exp_end
> exp_start
&& (exp_end
[-1] == ' ' || exp_end
[-1] == '\t'))
9138 /* Checking if the expression is not constant. */
9139 if (watchpoint_exp_is_const (exp
))
9143 len
= exp_end
- exp_start
;
9144 while (len
> 0 && isspace (exp_start
[len
- 1]))
9146 error (_("Cannot watch constant value `%.*s'."), len
, exp_start
);
9149 exp_valid_block
= innermost_block
;
9150 mark
= value_mark ();
9151 fetch_subexp_value (exp
, &pc
, &val
, &result
, NULL
);
9157 exp_valid_block
= NULL
;
9158 val
= value_addr (result
);
9159 release_value (val
);
9160 value_free_to_mark (mark
);
9164 ret
= target_masked_watch_num_registers (value_as_address (val
),
9167 error (_("This target does not support masked watchpoints."));
9169 error (_("Invalid mask or memory region."));
9172 else if (val
!= NULL
)
9173 release_value (val
);
9175 tok
= skip_spaces (arg
);
9176 end_tok
= skip_to_space (tok
);
9178 toklen
= end_tok
- tok
;
9179 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
9181 struct expression
*cond
;
9183 innermost_block
= NULL
;
9184 tok
= cond_start
= end_tok
+ 1;
9185 cond
= parse_exp_1 (&tok
, 0, 0);
9187 /* The watchpoint expression may not be local, but the condition
9188 may still be. E.g.: `watch global if local > 0'. */
9189 cond_exp_valid_block
= innermost_block
;
9195 error (_("Junk at end of command."));
9197 if (accessflag
== hw_read
)
9198 bp_type
= bp_read_watchpoint
;
9199 else if (accessflag
== hw_access
)
9200 bp_type
= bp_access_watchpoint
;
9202 bp_type
= bp_hardware_watchpoint
;
9204 frame
= block_innermost_frame (exp_valid_block
);
9206 /* If the expression is "local", then set up a "watchpoint scope"
9207 breakpoint at the point where we've left the scope of the watchpoint
9208 expression. Create the scope breakpoint before the watchpoint, so
9209 that we will encounter it first in bpstat_stop_status. */
9210 if (exp_valid_block
&& frame
)
9212 if (frame_id_p (frame_unwind_caller_id (frame
)))
9215 = create_internal_breakpoint (frame_unwind_caller_arch (frame
),
9216 frame_unwind_caller_pc (frame
),
9217 bp_watchpoint_scope
,
9218 &momentary_breakpoint_ops
);
9220 scope_breakpoint
->enable_state
= bp_enabled
;
9222 /* Automatically delete the breakpoint when it hits. */
9223 scope_breakpoint
->disposition
= disp_del
;
9225 /* Only break in the proper frame (help with recursion). */
9226 scope_breakpoint
->frame_id
= frame_unwind_caller_id (frame
);
9228 /* Set the address at which we will stop. */
9229 scope_breakpoint
->loc
->gdbarch
9230 = frame_unwind_caller_arch (frame
);
9231 scope_breakpoint
->loc
->requested_address
9232 = frame_unwind_caller_pc (frame
);
9233 scope_breakpoint
->loc
->address
9234 = adjust_breakpoint_address (scope_breakpoint
->loc
->gdbarch
,
9235 scope_breakpoint
->loc
->requested_address
,
9236 scope_breakpoint
->type
);
9240 /* Now set up the breakpoint. */
9242 w
= XCNEW (struct watchpoint
);
9245 init_raw_breakpoint_without_location (b
, NULL
, bp_type
,
9246 &masked_watchpoint_breakpoint_ops
);
9248 init_raw_breakpoint_without_location (b
, NULL
, bp_type
,
9249 &watchpoint_breakpoint_ops
);
9251 b
->disposition
= disp_donttouch
;
9252 b
->pspace
= current_program_space
;
9254 w
->exp_valid_block
= exp_valid_block
;
9255 w
->cond_exp_valid_block
= cond_exp_valid_block
;
9258 struct type
*t
= value_type (val
);
9259 CORE_ADDR addr
= value_as_address (val
);
9262 t
= check_typedef (TYPE_TARGET_TYPE (check_typedef (t
)));
9263 name
= type_to_string (t
);
9265 w
->exp_string_reparse
= xstrprintf ("* (%s *) %s", name
,
9266 core_addr_to_string (addr
));
9269 w
->exp_string
= xstrprintf ("-location %.*s",
9270 (int) (exp_end
- exp_start
), exp_start
);
9272 /* The above expression is in C. */
9273 b
->language
= language_c
;
9276 w
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
9280 w
->hw_wp_mask
= mask
;
9289 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
9295 w
->watchpoint_frame
= get_frame_id (frame
);
9296 w
->watchpoint_thread
= inferior_ptid
;
9300 w
->watchpoint_frame
= null_frame_id
;
9301 w
->watchpoint_thread
= null_ptid
;
9304 if (scope_breakpoint
!= NULL
)
9306 /* The scope breakpoint is related to the watchpoint. We will
9307 need to act on them together. */
9308 b
->related_breakpoint
= scope_breakpoint
;
9309 scope_breakpoint
->related_breakpoint
= b
;
9313 value_free_to_mark (mark
);
9315 TRY_CATCH (e
, RETURN_MASK_ALL
)
9317 /* Finally update the new watchpoint. This creates the locations
9318 that should be inserted. */
9319 update_watchpoint (w
, 1);
9323 delete_breakpoint (b
);
9324 throw_exception (e
);
9327 install_breakpoint (internal
, b
, 1);
9330 /* Return count of debug registers needed to watch the given expression.
9331 If the watchpoint cannot be handled in hardware return zero. */
9334 can_use_hardware_watchpoint (struct value
*v
)
9336 int found_memory_cnt
= 0;
9337 struct value
*head
= v
;
9339 /* Did the user specifically forbid us to use hardware watchpoints? */
9340 if (!can_use_hw_watchpoints
)
9343 /* Make sure that the value of the expression depends only upon
9344 memory contents, and values computed from them within GDB. If we
9345 find any register references or function calls, we can't use a
9346 hardware watchpoint.
9348 The idea here is that evaluating an expression generates a series
9349 of values, one holding the value of every subexpression. (The
9350 expression a*b+c has five subexpressions: a, b, a*b, c, and
9351 a*b+c.) GDB's values hold almost enough information to establish
9352 the criteria given above --- they identify memory lvalues,
9353 register lvalues, computed values, etcetera. So we can evaluate
9354 the expression, and then scan the chain of values that leaves
9355 behind to decide whether we can detect any possible change to the
9356 expression's final value using only hardware watchpoints.
9358 However, I don't think that the values returned by inferior
9359 function calls are special in any way. So this function may not
9360 notice that an expression involving an inferior function call
9361 can't be watched with hardware watchpoints. FIXME. */
9362 for (; v
; v
= value_next (v
))
9364 if (VALUE_LVAL (v
) == lval_memory
)
9366 if (v
!= head
&& value_lazy (v
))
9367 /* A lazy memory lvalue in the chain is one that GDB never
9368 needed to fetch; we either just used its address (e.g.,
9369 `a' in `a.b') or we never needed it at all (e.g., `a'
9370 in `a,b'). This doesn't apply to HEAD; if that is
9371 lazy then it was not readable, but watch it anyway. */
9375 /* Ahh, memory we actually used! Check if we can cover
9376 it with hardware watchpoints. */
9377 struct type
*vtype
= check_typedef (value_type (v
));
9379 /* We only watch structs and arrays if user asked for it
9380 explicitly, never if they just happen to appear in a
9381 middle of some value chain. */
9383 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
9384 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
9386 CORE_ADDR vaddr
= value_address (v
);
9390 len
= (target_exact_watchpoints
9391 && is_scalar_type_recursive (vtype
))?
9392 1 : TYPE_LENGTH (value_type (v
));
9394 num_regs
= target_region_ok_for_hw_watchpoint (vaddr
, len
);
9398 found_memory_cnt
+= num_regs
;
9402 else if (VALUE_LVAL (v
) != not_lval
9403 && deprecated_value_modifiable (v
) == 0)
9404 return 0; /* These are values from the history (e.g., $1). */
9405 else if (VALUE_LVAL (v
) == lval_register
)
9406 return 0; /* Cannot watch a register with a HW watchpoint. */
9409 /* The expression itself looks suitable for using a hardware
9410 watchpoint, but give the target machine a chance to reject it. */
9411 return found_memory_cnt
;
9415 watch_command_wrapper (char *arg
, int from_tty
, int internal
)
9417 watch_command_1 (arg
, hw_write
, from_tty
, 0, internal
);
9420 /* A helper function that looks for an argument at the start of a
9421 string. The argument must also either be at the end of the string,
9422 or be followed by whitespace. Returns 1 if it finds the argument,
9423 0 otherwise. If the argument is found, it updates *STR. */
9426 check_for_argument (char **str
, char *arg
, int arg_len
)
9428 if (strncmp (*str
, arg
, arg_len
) == 0
9429 && ((*str
)[arg_len
] == '\0' || isspace ((*str
)[arg_len
])))
9437 /* A helper function that looks for the "-location" argument and then
9438 calls watch_command_1. */
9441 watch_maybe_just_location (char *arg
, int accessflag
, int from_tty
)
9443 int just_location
= 0;
9446 && (check_for_argument (&arg
, "-location", sizeof ("-location") - 1)
9447 || check_for_argument (&arg
, "-l", sizeof ("-l") - 1)))
9449 arg
= skip_spaces (arg
);
9453 watch_command_1 (arg
, accessflag
, from_tty
, just_location
, 0);
9457 watch_command (char *arg
, int from_tty
)
9459 watch_maybe_just_location (arg
, hw_write
, from_tty
);
9463 rwatch_command_wrapper (char *arg
, int from_tty
, int internal
)
9465 watch_command_1 (arg
, hw_read
, from_tty
, 0, internal
);
9469 rwatch_command (char *arg
, int from_tty
)
9471 watch_maybe_just_location (arg
, hw_read
, from_tty
);
9475 awatch_command_wrapper (char *arg
, int from_tty
, int internal
)
9477 watch_command_1 (arg
, hw_access
, from_tty
, 0, internal
);
9481 awatch_command (char *arg
, int from_tty
)
9483 watch_maybe_just_location (arg
, hw_access
, from_tty
);
9487 /* Helper routines for the until_command routine in infcmd.c. Here
9488 because it uses the mechanisms of breakpoints. */
9490 struct until_break_command_continuation_args
9492 struct breakpoint
*breakpoint
;
9493 struct breakpoint
*breakpoint2
;
9497 /* This function is called by fetch_inferior_event via the
9498 cmd_continuation pointer, to complete the until command. It takes
9499 care of cleaning up the temporary breakpoints set up by the until
9502 until_break_command_continuation (void *arg
, int err
)
9504 struct until_break_command_continuation_args
*a
= arg
;
9506 delete_breakpoint (a
->breakpoint
);
9508 delete_breakpoint (a
->breakpoint2
);
9509 delete_longjmp_breakpoint (a
->thread_num
);
9513 until_break_command (char *arg
, int from_tty
, int anywhere
)
9515 struct symtabs_and_lines sals
;
9516 struct symtab_and_line sal
;
9517 struct frame_info
*frame
= get_selected_frame (NULL
);
9518 struct breakpoint
*breakpoint
;
9519 struct breakpoint
*breakpoint2
= NULL
;
9520 struct cleanup
*old_chain
;
9522 struct thread_info
*tp
;
9524 clear_proceed_status ();
9526 /* Set a breakpoint where the user wants it and at return from
9529 if (last_displayed_sal_is_valid ())
9530 sals
= decode_line_1 (&arg
, DECODE_LINE_FUNFIRSTLINE
,
9531 get_last_displayed_symtab (),
9532 get_last_displayed_line ());
9534 sals
= decode_line_1 (&arg
, DECODE_LINE_FUNFIRSTLINE
,
9535 (struct symtab
*) NULL
, 0);
9537 if (sals
.nelts
!= 1)
9538 error (_("Couldn't get information on specified line."));
9541 xfree (sals
.sals
); /* malloc'd, so freed. */
9544 error (_("Junk at end of arguments."));
9546 resolve_sal_pc (&sal
);
9549 /* If the user told us to continue until a specified location,
9550 we don't specify a frame at which we need to stop. */
9551 breakpoint
= set_momentary_breakpoint (get_frame_arch (frame
), sal
,
9552 null_frame_id
, bp_until
);
9554 /* Otherwise, specify the selected frame, because we want to stop
9555 only at the very same frame. */
9556 breakpoint
= set_momentary_breakpoint (get_frame_arch (frame
), sal
,
9557 get_stack_frame_id (frame
),
9560 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
9562 tp
= inferior_thread ();
9565 /* Keep within the current frame, or in frames called by the current
9568 if (frame_id_p (frame_unwind_caller_id (frame
)))
9570 sal
= find_pc_line (frame_unwind_caller_pc (frame
), 0);
9571 sal
.pc
= frame_unwind_caller_pc (frame
);
9572 breakpoint2
= set_momentary_breakpoint (frame_unwind_caller_arch (frame
),
9574 frame_unwind_caller_id (frame
),
9576 make_cleanup_delete_breakpoint (breakpoint2
);
9578 set_longjmp_breakpoint (tp
, frame_unwind_caller_id (frame
));
9579 make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
9582 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
9584 /* If we are running asynchronously, and proceed call above has
9585 actually managed to start the target, arrange for breakpoints to
9586 be deleted when the target stops. Otherwise, we're already
9587 stopped and delete breakpoints via cleanup chain. */
9589 if (target_can_async_p () && is_running (inferior_ptid
))
9591 struct until_break_command_continuation_args
*args
;
9592 args
= xmalloc (sizeof (*args
));
9594 args
->breakpoint
= breakpoint
;
9595 args
->breakpoint2
= breakpoint2
;
9596 args
->thread_num
= thread
;
9598 discard_cleanups (old_chain
);
9599 add_continuation (inferior_thread (),
9600 until_break_command_continuation
, args
,
9604 do_cleanups (old_chain
);
9607 /* This function attempts to parse an optional "if <cond>" clause
9608 from the arg string. If one is not found, it returns NULL.
9610 Else, it returns a pointer to the condition string. (It does not
9611 attempt to evaluate the string against a particular block.) And,
9612 it updates arg to point to the first character following the parsed
9613 if clause in the arg string. */
9616 ep_parse_optional_if_clause (char **arg
)
9620 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
9623 /* Skip the "if" keyword. */
9626 /* Skip any extra leading whitespace, and record the start of the
9627 condition string. */
9628 *arg
= skip_spaces (*arg
);
9631 /* Assume that the condition occupies the remainder of the arg
9633 (*arg
) += strlen (cond_string
);
9638 /* Commands to deal with catching events, such as signals, exceptions,
9639 process start/exit, etc. */
9643 catch_fork_temporary
, catch_vfork_temporary
,
9644 catch_fork_permanent
, catch_vfork_permanent
9649 catch_fork_command_1 (char *arg
, int from_tty
,
9650 struct cmd_list_element
*command
)
9652 struct gdbarch
*gdbarch
= get_current_arch ();
9653 char *cond_string
= NULL
;
9654 catch_fork_kind fork_kind
;
9657 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
9658 tempflag
= (fork_kind
== catch_fork_temporary
9659 || fork_kind
== catch_vfork_temporary
);
9663 arg
= skip_spaces (arg
);
9665 /* The allowed syntax is:
9667 catch [v]fork if <cond>
9669 First, check if there's an if clause. */
9670 cond_string
= ep_parse_optional_if_clause (&arg
);
9672 if ((*arg
!= '\0') && !isspace (*arg
))
9673 error (_("Junk at end of arguments."));
9675 /* If this target supports it, create a fork or vfork catchpoint
9676 and enable reporting of such events. */
9679 case catch_fork_temporary
:
9680 case catch_fork_permanent
:
9681 create_fork_vfork_event_catchpoint (gdbarch
, tempflag
, cond_string
,
9682 &catch_fork_breakpoint_ops
);
9684 case catch_vfork_temporary
:
9685 case catch_vfork_permanent
:
9686 create_fork_vfork_event_catchpoint (gdbarch
, tempflag
, cond_string
,
9687 &catch_vfork_breakpoint_ops
);
9690 error (_("unsupported or unknown fork kind; cannot catch it"));
9696 catch_exec_command_1 (char *arg
, int from_tty
,
9697 struct cmd_list_element
*command
)
9699 struct exec_catchpoint
*c
;
9700 struct gdbarch
*gdbarch
= get_current_arch ();
9702 char *cond_string
= NULL
;
9704 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
9708 arg
= skip_spaces (arg
);
9710 /* The allowed syntax is:
9712 catch exec if <cond>
9714 First, check if there's an if clause. */
9715 cond_string
= ep_parse_optional_if_clause (&arg
);
9717 if ((*arg
!= '\0') && !isspace (*arg
))
9718 error (_("Junk at end of arguments."));
9720 c
= XNEW (struct exec_catchpoint
);
9721 init_catchpoint (&c
->base
, gdbarch
, tempflag
, cond_string
,
9722 &catch_exec_breakpoint_ops
);
9723 c
->exec_pathname
= NULL
;
9725 install_breakpoint (0, &c
->base
, 1);
9728 static enum print_stop_action
9729 print_it_exception_catchpoint (bpstat bs
)
9731 struct ui_out
*uiout
= current_uiout
;
9732 struct breakpoint
*b
= bs
->breakpoint_at
;
9733 int bp_temp
, bp_throw
;
9735 annotate_catchpoint (b
->number
);
9737 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
9738 if (b
->loc
->address
!= b
->loc
->requested_address
)
9739 breakpoint_adjustment_warning (b
->loc
->requested_address
,
9742 bp_temp
= b
->disposition
== disp_del
;
9744 bp_temp
? "Temporary catchpoint "
9746 if (!ui_out_is_mi_like_p (uiout
))
9747 ui_out_field_int (uiout
, "bkptno", b
->number
);
9749 bp_throw
? " (exception thrown), "
9750 : " (exception caught), ");
9751 if (ui_out_is_mi_like_p (uiout
))
9753 ui_out_field_string (uiout
, "reason",
9754 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
9755 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
9756 ui_out_field_int (uiout
, "bkptno", b
->number
);
9758 return PRINT_SRC_AND_LOC
;
9762 print_one_exception_catchpoint (struct breakpoint
*b
,
9763 struct bp_location
**last_loc
)
9765 struct value_print_options opts
;
9766 struct ui_out
*uiout
= current_uiout
;
9768 get_user_print_options (&opts
);
9769 if (opts
.addressprint
)
9772 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
9773 ui_out_field_string (uiout
, "addr", "<PENDING>");
9775 ui_out_field_core_addr (uiout
, "addr",
9776 b
->loc
->gdbarch
, b
->loc
->address
);
9781 if (strstr (b
->addr_string
, "throw") != NULL
)
9782 ui_out_field_string (uiout
, "what", "exception throw");
9784 ui_out_field_string (uiout
, "what", "exception catch");
9788 print_mention_exception_catchpoint (struct breakpoint
*b
)
9790 struct ui_out
*uiout
= current_uiout
;
9794 bp_temp
= b
->disposition
== disp_del
;
9795 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
9796 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
9797 : _("Catchpoint "));
9798 ui_out_field_int (uiout
, "bkptno", b
->number
);
9799 ui_out_text (uiout
, bp_throw
? _(" (throw)")
9803 /* Implement the "print_recreate" breakpoint_ops method for throw and
9804 catch catchpoints. */
9807 print_recreate_exception_catchpoint (struct breakpoint
*b
,
9813 bp_temp
= b
->disposition
== disp_del
;
9814 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
9815 fprintf_unfiltered (fp
, bp_temp
? "tcatch " : "catch ");
9816 fprintf_unfiltered (fp
, bp_throw
? "throw" : "catch");
9817 print_recreate_thread (b
, fp
);
9820 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
;
9823 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
9824 enum exception_event_kind ex_event
, int from_tty
)
9826 char *trigger_func_name
;
9828 if (ex_event
== EX_EVENT_CATCH
)
9829 trigger_func_name
= "__cxa_begin_catch";
9831 trigger_func_name
= "__cxa_throw";
9833 create_breakpoint (get_current_arch (),
9834 trigger_func_name
, cond_string
, -1,
9835 0 /* condition and thread are valid. */,
9836 tempflag
, bp_breakpoint
,
9838 AUTO_BOOLEAN_TRUE
/* pending */,
9839 &gnu_v3_exception_catchpoint_ops
, from_tty
,
9846 /* Deal with "catch catch" and "catch throw" commands. */
9849 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
9850 int tempflag
, int from_tty
)
9852 char *cond_string
= NULL
;
9856 arg
= skip_spaces (arg
);
9858 cond_string
= ep_parse_optional_if_clause (&arg
);
9860 if ((*arg
!= '\0') && !isspace (*arg
))
9861 error (_("Junk at end of arguments."));
9863 if (ex_event
!= EX_EVENT_THROW
9864 && ex_event
!= EX_EVENT_CATCH
)
9865 error (_("Unsupported or unknown exception event; cannot catch it"));
9867 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
9870 warning (_("Unsupported with this platform/compiler combination."));
9873 /* Implementation of "catch catch" command. */
9876 catch_catch_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
9878 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
9880 catch_exception_command_1 (EX_EVENT_CATCH
, arg
, tempflag
, from_tty
);
9883 /* Implementation of "catch throw" command. */
9886 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
9888 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
9890 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
9894 init_ada_exception_breakpoint (struct breakpoint
*b
,
9895 struct gdbarch
*gdbarch
,
9896 struct symtab_and_line sal
,
9898 const struct breakpoint_ops
*ops
,
9904 struct gdbarch
*loc_gdbarch
= get_sal_arch (sal
);
9906 loc_gdbarch
= gdbarch
;
9908 describe_other_breakpoints (loc_gdbarch
,
9909 sal
.pspace
, sal
.pc
, sal
.section
, -1);
9910 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
9911 version for exception catchpoints, because two catchpoints
9912 used for different exception names will use the same address.
9913 In this case, a "breakpoint ... also set at..." warning is
9914 unproductive. Besides, the warning phrasing is also a bit
9915 inappropriate, we should use the word catchpoint, and tell
9916 the user what type of catchpoint it is. The above is good
9917 enough for now, though. */
9920 init_raw_breakpoint (b
, gdbarch
, sal
, bp_breakpoint
, ops
);
9922 b
->enable_state
= bp_enabled
;
9923 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
9924 b
->addr_string
= addr_string
;
9925 b
->language
= language_ada
;
9928 /* Splits the argument using space as delimiter. Returns an xmalloc'd
9929 filter list, or NULL if no filtering is required. */
9931 catch_syscall_split_args (char *arg
)
9933 VEC(int) *result
= NULL
;
9934 struct cleanup
*cleanup
= make_cleanup (VEC_cleanup (int), &result
);
9936 while (*arg
!= '\0')
9938 int i
, syscall_number
;
9943 /* Skip whitespace. */
9944 while (isspace (*arg
))
9947 for (i
= 0; i
< 127 && arg
[i
] && !isspace (arg
[i
]); ++i
)
9948 cur_name
[i
] = arg
[i
];
9952 /* Check if the user provided a syscall name or a number. */
9953 syscall_number
= (int) strtol (cur_name
, &endptr
, 0);
9954 if (*endptr
== '\0')
9955 get_syscall_by_number (syscall_number
, &s
);
9958 /* We have a name. Let's check if it's valid and convert it
9960 get_syscall_by_name (cur_name
, &s
);
9962 if (s
.number
== UNKNOWN_SYSCALL
)
9963 /* Here we have to issue an error instead of a warning,
9964 because GDB cannot do anything useful if there's no
9965 syscall number to be caught. */
9966 error (_("Unknown syscall name '%s'."), cur_name
);
9969 /* Ok, it's valid. */
9970 VEC_safe_push (int, result
, s
.number
);
9973 discard_cleanups (cleanup
);
9977 /* Implement the "catch syscall" command. */
9980 catch_syscall_command_1 (char *arg
, int from_tty
,
9981 struct cmd_list_element
*command
)
9986 struct gdbarch
*gdbarch
= get_current_arch ();
9988 /* Checking if the feature if supported. */
9989 if (gdbarch_get_syscall_number_p (gdbarch
) == 0)
9990 error (_("The feature 'catch syscall' is not supported on \
9991 this architecture yet."));
9993 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
9995 arg
= skip_spaces (arg
);
9997 /* We need to do this first "dummy" translation in order
9998 to get the syscall XML file loaded or, most important,
9999 to display a warning to the user if there's no XML file
10000 for his/her architecture. */
10001 get_syscall_by_number (0, &s
);
10003 /* The allowed syntax is:
10005 catch syscall <name | number> [<name | number> ... <name | number>]
10007 Let's check if there's a syscall name. */
10010 filter
= catch_syscall_split_args (arg
);
10014 create_syscall_event_catchpoint (tempflag
, filter
,
10015 &catch_syscall_breakpoint_ops
);
10019 catch_command (char *arg
, int from_tty
)
10021 error (_("Catch requires an event name."));
10026 tcatch_command (char *arg
, int from_tty
)
10028 error (_("Catch requires an event name."));
10031 /* A qsort comparison function that sorts breakpoints in order. */
10034 compare_breakpoints (const void *a
, const void *b
)
10036 const breakpoint_p
*ba
= a
;
10037 uintptr_t ua
= (uintptr_t) *ba
;
10038 const breakpoint_p
*bb
= b
;
10039 uintptr_t ub
= (uintptr_t) *bb
;
10041 if ((*ba
)->number
< (*bb
)->number
)
10043 else if ((*ba
)->number
> (*bb
)->number
)
10046 /* Now sort by address, in case we see, e..g, two breakpoints with
10050 return ub
> ub
? 1 : 0;
10053 /* Delete breakpoints by address or line. */
10056 clear_command (char *arg
, int from_tty
)
10058 struct breakpoint
*b
, *prev
;
10059 VEC(breakpoint_p
) *found
= 0;
10062 struct symtabs_and_lines sals
;
10063 struct symtab_and_line sal
;
10065 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
10069 sals
= decode_line_spec (arg
, (DECODE_LINE_FUNFIRSTLINE
10070 | DECODE_LINE_LIST_MODE
));
10075 sals
.sals
= (struct symtab_and_line
*)
10076 xmalloc (sizeof (struct symtab_and_line
));
10077 make_cleanup (xfree
, sals
.sals
);
10078 init_sal (&sal
); /* Initialize to zeroes. */
10080 /* Set sal's line, symtab, pc, and pspace to the values
10081 corresponding to the last call to print_frame_info. If the
10082 codepoint is not valid, this will set all the fields to 0. */
10083 get_last_displayed_sal (&sal
);
10084 if (sal
.symtab
== 0)
10085 error (_("No source file specified."));
10087 sals
.sals
[0] = sal
;
10093 /* We don't call resolve_sal_pc here. That's not as bad as it
10094 seems, because all existing breakpoints typically have both
10095 file/line and pc set. So, if clear is given file/line, we can
10096 match this to existing breakpoint without obtaining pc at all.
10098 We only support clearing given the address explicitly
10099 present in breakpoint table. Say, we've set breakpoint
10100 at file:line. There were several PC values for that file:line,
10101 due to optimization, all in one block.
10103 We've picked one PC value. If "clear" is issued with another
10104 PC corresponding to the same file:line, the breakpoint won't
10105 be cleared. We probably can still clear the breakpoint, but
10106 since the other PC value is never presented to user, user
10107 can only find it by guessing, and it does not seem important
10108 to support that. */
10110 /* For each line spec given, delete bps which correspond to it. Do
10111 it in two passes, solely to preserve the current behavior that
10112 from_tty is forced true if we delete more than one
10116 make_cleanup (VEC_cleanup (breakpoint_p
), &found
);
10117 for (i
= 0; i
< sals
.nelts
; i
++)
10119 /* If exact pc given, clear bpts at that pc.
10120 If line given (pc == 0), clear all bpts on specified line.
10121 If defaulting, clear all bpts on default line
10124 defaulting sal.pc != 0 tests to do
10129 1 0 <can't happen> */
10131 sal
= sals
.sals
[i
];
10133 /* Find all matching breakpoints and add them to 'found'. */
10134 ALL_BREAKPOINTS (b
)
10137 /* Are we going to delete b? */
10138 if (b
->type
!= bp_none
&& !is_watchpoint (b
))
10140 struct bp_location
*loc
= b
->loc
;
10141 for (; loc
; loc
= loc
->next
)
10143 /* If the user specified file:line, don't allow a PC
10144 match. This matches historical gdb behavior. */
10145 int pc_match
= (!sal
.explicit_line
10147 && (loc
->pspace
== sal
.pspace
)
10148 && (loc
->address
== sal
.pc
)
10149 && (!section_is_overlay (loc
->section
)
10150 || loc
->section
== sal
.section
));
10151 int line_match
= ((default_match
|| sal
.explicit_line
)
10152 && loc
->source_file
!= NULL
10153 && sal
.symtab
!= NULL
10154 && sal
.pspace
== loc
->pspace
10155 && filename_cmp (loc
->source_file
,
10156 sal
.symtab
->filename
) == 0
10157 && loc
->line_number
== sal
.line
);
10158 if (pc_match
|| line_match
)
10167 VEC_safe_push(breakpoint_p
, found
, b
);
10171 /* Now go thru the 'found' chain and delete them. */
10172 if (VEC_empty(breakpoint_p
, found
))
10175 error (_("No breakpoint at %s."), arg
);
10177 error (_("No breakpoint at this line."));
10180 /* Remove duplicates from the vec. */
10181 qsort (VEC_address (breakpoint_p
, found
),
10182 VEC_length (breakpoint_p
, found
),
10183 sizeof (breakpoint_p
),
10184 compare_breakpoints
);
10185 prev
= VEC_index (breakpoint_p
, found
, 0);
10186 for (ix
= 1; VEC_iterate (breakpoint_p
, found
, ix
, b
); ++ix
)
10190 VEC_ordered_remove (breakpoint_p
, found
, ix
);
10195 if (VEC_length(breakpoint_p
, found
) > 1)
10196 from_tty
= 1; /* Always report if deleted more than one. */
10199 if (VEC_length(breakpoint_p
, found
) == 1)
10200 printf_unfiltered (_("Deleted breakpoint "));
10202 printf_unfiltered (_("Deleted breakpoints "));
10204 breakpoints_changed ();
10206 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
10209 printf_unfiltered ("%d ", b
->number
);
10210 delete_breakpoint (b
);
10213 putchar_unfiltered ('\n');
10215 do_cleanups (cleanups
);
10218 /* Delete breakpoint in BS if they are `delete' breakpoints and
10219 all breakpoints that are marked for deletion, whether hit or not.
10220 This is called after any breakpoint is hit, or after errors. */
10223 breakpoint_auto_delete (bpstat bs
)
10225 struct breakpoint
*b
, *b_tmp
;
10227 for (; bs
; bs
= bs
->next
)
10228 if (bs
->breakpoint_at
10229 && bs
->breakpoint_at
->disposition
== disp_del
10231 delete_breakpoint (bs
->breakpoint_at
);
10233 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
10235 if (b
->disposition
== disp_del_at_next_stop
)
10236 delete_breakpoint (b
);
10240 /* A comparison function for bp_location AP and BP being interfaced to
10241 qsort. Sort elements primarily by their ADDRESS (no matter what
10242 does breakpoint_address_is_meaningful say for its OWNER),
10243 secondarily by ordering first bp_permanent OWNERed elements and
10244 terciarily just ensuring the array is sorted stable way despite
10245 qsort being an unstable algorithm. */
10248 bp_location_compare (const void *ap
, const void *bp
)
10250 struct bp_location
*a
= *(void **) ap
;
10251 struct bp_location
*b
= *(void **) bp
;
10252 /* A and B come from existing breakpoints having non-NULL OWNER. */
10253 int a_perm
= a
->owner
->enable_state
== bp_permanent
;
10254 int b_perm
= b
->owner
->enable_state
== bp_permanent
;
10256 if (a
->address
!= b
->address
)
10257 return (a
->address
> b
->address
) - (a
->address
< b
->address
);
10259 /* Sort permanent breakpoints first. */
10260 if (a_perm
!= b_perm
)
10261 return (a_perm
< b_perm
) - (a_perm
> b_perm
);
10263 /* Make the user-visible order stable across GDB runs. Locations of
10264 the same breakpoint can be sorted in arbitrary order. */
10266 if (a
->owner
->number
!= b
->owner
->number
)
10267 return (a
->owner
->number
> b
->owner
->number
)
10268 - (a
->owner
->number
< b
->owner
->number
);
10270 return (a
> b
) - (a
< b
);
10273 /* Set bp_location_placed_address_before_address_max and
10274 bp_location_shadow_len_after_address_max according to the current
10275 content of the bp_location array. */
10278 bp_location_target_extensions_update (void)
10280 struct bp_location
*bl
, **blp_tmp
;
10282 bp_location_placed_address_before_address_max
= 0;
10283 bp_location_shadow_len_after_address_max
= 0;
10285 ALL_BP_LOCATIONS (bl
, blp_tmp
)
10287 CORE_ADDR start
, end
, addr
;
10289 if (!bp_location_has_shadow (bl
))
10292 start
= bl
->target_info
.placed_address
;
10293 end
= start
+ bl
->target_info
.shadow_len
;
10295 gdb_assert (bl
->address
>= start
);
10296 addr
= bl
->address
- start
;
10297 if (addr
> bp_location_placed_address_before_address_max
)
10298 bp_location_placed_address_before_address_max
= addr
;
10300 /* Zero SHADOW_LEN would not pass bp_location_has_shadow. */
10302 gdb_assert (bl
->address
< end
);
10303 addr
= end
- bl
->address
;
10304 if (addr
> bp_location_shadow_len_after_address_max
)
10305 bp_location_shadow_len_after_address_max
= addr
;
10309 /* Download tracepoint locations if they haven't been. */
10312 download_tracepoint_locations (void)
10314 struct bp_location
*bl
, **blp_tmp
;
10315 struct cleanup
*old_chain
;
10317 if (!target_can_download_tracepoint ())
10320 old_chain
= save_current_space_and_thread ();
10322 ALL_BP_LOCATIONS (bl
, blp_tmp
)
10324 struct tracepoint
*t
;
10326 if (!is_tracepoint (bl
->owner
))
10329 if ((bl
->owner
->type
== bp_fast_tracepoint
10330 ? !may_insert_fast_tracepoints
10331 : !may_insert_tracepoints
))
10334 /* In tracepoint, locations are _never_ duplicated, so
10335 should_be_inserted is equivalent to
10336 unduplicated_should_be_inserted. */
10337 if (!should_be_inserted (bl
) || bl
->inserted
)
10340 switch_to_program_space_and_thread (bl
->pspace
);
10342 target_download_tracepoint (bl
);
10345 t
= (struct tracepoint
*) bl
->owner
;
10346 t
->number_on_target
= bl
->owner
->number
;
10349 do_cleanups (old_chain
);
10352 /* Swap the insertion/duplication state between two locations. */
10355 swap_insertion (struct bp_location
*left
, struct bp_location
*right
)
10357 const int left_inserted
= left
->inserted
;
10358 const int left_duplicate
= left
->duplicate
;
10359 const struct bp_target_info left_target_info
= left
->target_info
;
10361 /* Locations of tracepoints can never be duplicated. */
10362 if (is_tracepoint (left
->owner
))
10363 gdb_assert (!left
->duplicate
);
10364 if (is_tracepoint (right
->owner
))
10365 gdb_assert (!right
->duplicate
);
10367 left
->inserted
= right
->inserted
;
10368 left
->duplicate
= right
->duplicate
;
10369 left
->target_info
= right
->target_info
;
10370 right
->inserted
= left_inserted
;
10371 right
->duplicate
= left_duplicate
;
10372 right
->target_info
= left_target_info
;
10375 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
10376 into the inferior, only remove already-inserted locations that no
10377 longer should be inserted. Functions that delete a breakpoint or
10378 breakpoints should pass false, so that deleting a breakpoint
10379 doesn't have the side effect of inserting the locations of other
10380 breakpoints that are marked not-inserted, but should_be_inserted
10381 returns true on them.
10383 This behaviour is useful is situations close to tear-down -- e.g.,
10384 after an exec, while the target still has execution, but breakpoint
10385 shadows of the previous executable image should *NOT* be restored
10386 to the new image; or before detaching, where the target still has
10387 execution and wants to delete breakpoints from GDB's lists, and all
10388 breakpoints had already been removed from the inferior. */
10391 update_global_location_list (int should_insert
)
10393 struct breakpoint
*b
;
10394 struct bp_location
**locp
, *loc
;
10395 struct cleanup
*cleanups
;
10397 /* Used in the duplicates detection below. When iterating over all
10398 bp_locations, points to the first bp_location of a given address.
10399 Breakpoints and watchpoints of different types are never
10400 duplicates of each other. Keep one pointer for each type of
10401 breakpoint/watchpoint, so we only need to loop over all locations
10403 struct bp_location
*bp_loc_first
; /* breakpoint */
10404 struct bp_location
*wp_loc_first
; /* hardware watchpoint */
10405 struct bp_location
*awp_loc_first
; /* access watchpoint */
10406 struct bp_location
*rwp_loc_first
; /* read watchpoint */
10408 /* Saved former bp_location array which we compare against the newly
10409 built bp_location from the current state of ALL_BREAKPOINTS. */
10410 struct bp_location
**old_location
, **old_locp
;
10411 unsigned old_location_count
;
10413 old_location
= bp_location
;
10414 old_location_count
= bp_location_count
;
10415 bp_location
= NULL
;
10416 bp_location_count
= 0;
10417 cleanups
= make_cleanup (xfree
, old_location
);
10419 ALL_BREAKPOINTS (b
)
10420 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
10421 bp_location_count
++;
10423 bp_location
= xmalloc (sizeof (*bp_location
) * bp_location_count
);
10424 locp
= bp_location
;
10425 ALL_BREAKPOINTS (b
)
10426 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
10428 qsort (bp_location
, bp_location_count
, sizeof (*bp_location
),
10429 bp_location_compare
);
10431 bp_location_target_extensions_update ();
10433 /* Identify bp_location instances that are no longer present in the
10434 new list, and therefore should be freed. Note that it's not
10435 necessary that those locations should be removed from inferior --
10436 if there's another location at the same address (previously
10437 marked as duplicate), we don't need to remove/insert the
10440 LOCP is kept in sync with OLD_LOCP, each pointing to the current
10441 and former bp_location array state respectively. */
10443 locp
= bp_location
;
10444 for (old_locp
= old_location
; old_locp
< old_location
+ old_location_count
;
10447 struct bp_location
*old_loc
= *old_locp
;
10448 struct bp_location
**loc2p
;
10450 /* Tells if 'old_loc' is found among the new locations. If
10451 not, we have to free it. */
10452 int found_object
= 0;
10453 /* Tells if the location should remain inserted in the target. */
10454 int keep_in_target
= 0;
10457 /* Skip LOCP entries which will definitely never be needed.
10458 Stop either at or being the one matching OLD_LOC. */
10459 while (locp
< bp_location
+ bp_location_count
10460 && (*locp
)->address
< old_loc
->address
)
10464 (loc2p
< bp_location
+ bp_location_count
10465 && (*loc2p
)->address
== old_loc
->address
);
10468 if (*loc2p
== old_loc
)
10475 /* If this location is no longer present, and inserted, look if
10476 there's maybe a new location at the same address. If so,
10477 mark that one inserted, and don't remove this one. This is
10478 needed so that we don't have a time window where a breakpoint
10479 at certain location is not inserted. */
10481 if (old_loc
->inserted
)
10483 /* If the location is inserted now, we might have to remove
10486 if (found_object
&& should_be_inserted (old_loc
))
10488 /* The location is still present in the location list,
10489 and still should be inserted. Don't do anything. */
10490 keep_in_target
= 1;
10494 /* The location is either no longer present, or got
10495 disabled. See if there's another location at the
10496 same address, in which case we don't need to remove
10497 this one from the target. */
10499 /* OLD_LOC comes from existing struct breakpoint. */
10500 if (breakpoint_address_is_meaningful (old_loc
->owner
))
10503 (loc2p
< bp_location
+ bp_location_count
10504 && (*loc2p
)->address
== old_loc
->address
);
10507 struct bp_location
*loc2
= *loc2p
;
10509 if (breakpoint_locations_match (loc2
, old_loc
))
10511 /* Read watchpoint locations are switched to
10512 access watchpoints, if the former are not
10513 supported, but the latter are. */
10514 if (is_hardware_watchpoint (old_loc
->owner
))
10516 gdb_assert (is_hardware_watchpoint (loc2
->owner
));
10517 loc2
->watchpoint_type
= old_loc
->watchpoint_type
;
10520 /* loc2 is a duplicated location. We need to check
10521 if it should be inserted in case it will be
10523 if (loc2
!= old_loc
10524 && unduplicated_should_be_inserted (loc2
))
10526 swap_insertion (old_loc
, loc2
);
10527 keep_in_target
= 1;
10535 if (!keep_in_target
)
10537 if (remove_breakpoint (old_loc
, mark_uninserted
))
10539 /* This is just about all we can do. We could keep
10540 this location on the global list, and try to
10541 remove it next time, but there's no particular
10542 reason why we will succeed next time.
10544 Note that at this point, old_loc->owner is still
10545 valid, as delete_breakpoint frees the breakpoint
10546 only after calling us. */
10547 printf_filtered (_("warning: Error removing "
10548 "breakpoint %d\n"),
10549 old_loc
->owner
->number
);
10557 if (removed
&& non_stop
10558 && breakpoint_address_is_meaningful (old_loc
->owner
)
10559 && !is_hardware_watchpoint (old_loc
->owner
))
10561 /* This location was removed from the target. In
10562 non-stop mode, a race condition is possible where
10563 we've removed a breakpoint, but stop events for that
10564 breakpoint are already queued and will arrive later.
10565 We apply an heuristic to be able to distinguish such
10566 SIGTRAPs from other random SIGTRAPs: we keep this
10567 breakpoint location for a bit, and will retire it
10568 after we see some number of events. The theory here
10569 is that reporting of events should, "on the average",
10570 be fair, so after a while we'll see events from all
10571 threads that have anything of interest, and no longer
10572 need to keep this breakpoint location around. We
10573 don't hold locations forever so to reduce chances of
10574 mistaking a non-breakpoint SIGTRAP for a breakpoint
10577 The heuristic failing can be disastrous on
10578 decr_pc_after_break targets.
10580 On decr_pc_after_break targets, like e.g., x86-linux,
10581 if we fail to recognize a late breakpoint SIGTRAP,
10582 because events_till_retirement has reached 0 too
10583 soon, we'll fail to do the PC adjustment, and report
10584 a random SIGTRAP to the user. When the user resumes
10585 the inferior, it will most likely immediately crash
10586 with SIGILL/SIGBUS/SIGSEGV, or worse, get silently
10587 corrupted, because of being resumed e.g., in the
10588 middle of a multi-byte instruction, or skipped a
10589 one-byte instruction. This was actually seen happen
10590 on native x86-linux, and should be less rare on
10591 targets that do not support new thread events, like
10592 remote, due to the heuristic depending on
10595 Mistaking a random SIGTRAP for a breakpoint trap
10596 causes similar symptoms (PC adjustment applied when
10597 it shouldn't), but then again, playing with SIGTRAPs
10598 behind the debugger's back is asking for trouble.
10600 Since hardware watchpoint traps are always
10601 distinguishable from other traps, so we don't need to
10602 apply keep hardware watchpoint moribund locations
10603 around. We simply always ignore hardware watchpoint
10604 traps we can no longer explain. */
10606 old_loc
->events_till_retirement
= 3 * (thread_count () + 1);
10607 old_loc
->owner
= NULL
;
10609 VEC_safe_push (bp_location_p
, moribund_locations
, old_loc
);
10613 old_loc
->owner
= NULL
;
10614 decref_bp_location (&old_loc
);
10619 /* Rescan breakpoints at the same address and section, marking the
10620 first one as "first" and any others as "duplicates". This is so
10621 that the bpt instruction is only inserted once. If we have a
10622 permanent breakpoint at the same place as BPT, make that one the
10623 official one, and the rest as duplicates. Permanent breakpoints
10624 are sorted first for the same address.
10626 Do the same for hardware watchpoints, but also considering the
10627 watchpoint's type (regular/access/read) and length. */
10629 bp_loc_first
= NULL
;
10630 wp_loc_first
= NULL
;
10631 awp_loc_first
= NULL
;
10632 rwp_loc_first
= NULL
;
10633 ALL_BP_LOCATIONS (loc
, locp
)
10635 /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always
10637 struct breakpoint
*b
= loc
->owner
;
10638 struct bp_location
**loc_first_p
;
10640 if (!should_be_inserted (loc
)
10641 || !breakpoint_address_is_meaningful (b
)
10642 /* Don't detect duplicate for tracepoint locations because they are
10643 never duplicated. See the comments in field `duplicate' of
10644 `struct bp_location'. */
10645 || is_tracepoint (b
))
10648 /* Permanent breakpoint should always be inserted. */
10649 if (b
->enable_state
== bp_permanent
&& ! loc
->inserted
)
10650 internal_error (__FILE__
, __LINE__
,
10651 _("allegedly permanent breakpoint is not "
10652 "actually inserted"));
10654 if (b
->type
== bp_hardware_watchpoint
)
10655 loc_first_p
= &wp_loc_first
;
10656 else if (b
->type
== bp_read_watchpoint
)
10657 loc_first_p
= &rwp_loc_first
;
10658 else if (b
->type
== bp_access_watchpoint
)
10659 loc_first_p
= &awp_loc_first
;
10661 loc_first_p
= &bp_loc_first
;
10663 if (*loc_first_p
== NULL
10664 || (overlay_debugging
&& loc
->section
!= (*loc_first_p
)->section
)
10665 || !breakpoint_locations_match (loc
, *loc_first_p
))
10667 *loc_first_p
= loc
;
10668 loc
->duplicate
= 0;
10673 /* This and the above ensure the invariant that the first location
10674 is not duplicated, and is the inserted one.
10675 All following are marked as duplicated, and are not inserted. */
10677 swap_insertion (loc
, *loc_first_p
);
10678 loc
->duplicate
= 1;
10680 if ((*loc_first_p
)->owner
->enable_state
== bp_permanent
&& loc
->inserted
10681 && b
->enable_state
!= bp_permanent
)
10682 internal_error (__FILE__
, __LINE__
,
10683 _("another breakpoint was inserted on top of "
10684 "a permanent breakpoint"));
10687 if (breakpoints_always_inserted_mode () && should_insert
10688 && (have_live_inferiors ()
10689 || (gdbarch_has_global_breakpoints (target_gdbarch
))))
10690 insert_breakpoint_locations ();
10693 download_tracepoint_locations ();
10695 do_cleanups (cleanups
);
10699 breakpoint_retire_moribund (void)
10701 struct bp_location
*loc
;
10704 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
10705 if (--(loc
->events_till_retirement
) == 0)
10707 decref_bp_location (&loc
);
10708 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
10714 update_global_location_list_nothrow (int inserting
)
10716 struct gdb_exception e
;
10718 TRY_CATCH (e
, RETURN_MASK_ERROR
)
10719 update_global_location_list (inserting
);
10722 /* Clear BKP from a BPS. */
10725 bpstat_remove_bp_location (bpstat bps
, struct breakpoint
*bpt
)
10729 for (bs
= bps
; bs
; bs
= bs
->next
)
10730 if (bs
->breakpoint_at
== bpt
)
10732 bs
->breakpoint_at
= NULL
;
10733 bs
->old_val
= NULL
;
10734 /* bs->commands will be freed later. */
10738 /* Callback for iterate_over_threads. */
10740 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
10742 struct breakpoint
*bpt
= data
;
10744 bpstat_remove_bp_location (th
->control
.stop_bpstat
, bpt
);
10748 /* Helper for breakpoint and tracepoint breakpoint_ops->mention
10752 say_where (struct breakpoint
*b
)
10754 struct ui_out
*uiout
= current_uiout
;
10755 struct value_print_options opts
;
10757 get_user_print_options (&opts
);
10759 /* i18n: cagney/2005-02-11: Below needs to be merged into a
10761 if (b
->loc
== NULL
)
10763 printf_filtered (_(" (%s) pending."), b
->addr_string
);
10767 if (opts
.addressprint
|| b
->loc
->source_file
== NULL
)
10769 printf_filtered (" at ");
10770 fputs_filtered (paddress (b
->loc
->gdbarch
, b
->loc
->address
),
10773 if (b
->loc
->source_file
)
10775 /* If there is a single location, we can print the location
10777 if (b
->loc
->next
== NULL
)
10778 printf_filtered (": file %s, line %d.",
10779 b
->loc
->source_file
, b
->loc
->line_number
);
10781 /* This is not ideal, but each location may have a
10782 different file name, and this at least reflects the
10783 real situation somewhat. */
10784 printf_filtered (": %s.", b
->addr_string
);
10789 struct bp_location
*loc
= b
->loc
;
10791 for (; loc
; loc
= loc
->next
)
10793 printf_filtered (" (%d locations)", n
);
10798 /* Default bp_location_ops methods. */
10801 bp_location_dtor (struct bp_location
*self
)
10803 xfree (self
->cond
);
10804 xfree (self
->function_name
);
10805 xfree (self
->source_file
);
10808 static const struct bp_location_ops bp_location_ops
=
10813 /* Default breakpoint_ops methods all breakpoint_ops ultimately
10817 base_breakpoint_dtor (struct breakpoint
*self
)
10819 decref_counted_command_line (&self
->commands
);
10820 xfree (self
->cond_string
);
10821 xfree (self
->addr_string
);
10822 xfree (self
->filter
);
10823 xfree (self
->addr_string_range_end
);
10826 static struct bp_location
*
10827 base_breakpoint_allocate_location (struct breakpoint
*self
)
10829 struct bp_location
*loc
;
10831 loc
= XNEW (struct bp_location
);
10832 init_bp_location (loc
, &bp_location_ops
, self
);
10837 base_breakpoint_re_set (struct breakpoint
*b
)
10839 /* Nothing to re-set. */
10842 #define internal_error_pure_virtual_called() \
10843 gdb_assert_not_reached ("pure virtual function called")
10846 base_breakpoint_insert_location (struct bp_location
*bl
)
10848 internal_error_pure_virtual_called ();
10852 base_breakpoint_remove_location (struct bp_location
*bl
)
10854 internal_error_pure_virtual_called ();
10858 base_breakpoint_breakpoint_hit (const struct bp_location
*bl
,
10859 struct address_space
*aspace
,
10862 internal_error_pure_virtual_called ();
10866 base_breakpoint_check_status (bpstat bs
)
10871 /* A "works_in_software_mode" breakpoint_ops method that just internal
10875 base_breakpoint_works_in_software_mode (const struct breakpoint
*b
)
10877 internal_error_pure_virtual_called ();
10880 /* A "resources_needed" breakpoint_ops method that just internal
10884 base_breakpoint_resources_needed (const struct bp_location
*bl
)
10886 internal_error_pure_virtual_called ();
10889 static enum print_stop_action
10890 base_breakpoint_print_it (bpstat bs
)
10892 internal_error_pure_virtual_called ();
10896 base_breakpoint_print_one_detail (const struct breakpoint
*self
,
10897 struct ui_out
*uiout
)
10903 base_breakpoint_print_mention (struct breakpoint
*b
)
10905 internal_error_pure_virtual_called ();
10909 base_breakpoint_print_recreate (struct breakpoint
*b
, struct ui_file
*fp
)
10911 internal_error_pure_virtual_called ();
10914 static struct breakpoint_ops base_breakpoint_ops
=
10916 base_breakpoint_dtor
,
10917 base_breakpoint_allocate_location
,
10918 base_breakpoint_re_set
,
10919 base_breakpoint_insert_location
,
10920 base_breakpoint_remove_location
,
10921 base_breakpoint_breakpoint_hit
,
10922 base_breakpoint_check_status
,
10923 base_breakpoint_resources_needed
,
10924 base_breakpoint_works_in_software_mode
,
10925 base_breakpoint_print_it
,
10927 base_breakpoint_print_one_detail
,
10928 base_breakpoint_print_mention
,
10929 base_breakpoint_print_recreate
10932 /* Default breakpoint_ops methods. */
10935 bkpt_re_set (struct breakpoint
*b
)
10937 /* FIXME: is this still reachable? */
10938 if (b
->addr_string
== NULL
)
10940 /* Anything without a string can't be re-set. */
10941 delete_breakpoint (b
);
10945 breakpoint_re_set_default (b
);
10949 bkpt_insert_location (struct bp_location
*bl
)
10951 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
10952 return target_insert_hw_breakpoint (bl
->gdbarch
,
10955 return target_insert_breakpoint (bl
->gdbarch
,
10960 bkpt_remove_location (struct bp_location
*bl
)
10962 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
10963 return target_remove_hw_breakpoint (bl
->gdbarch
, &bl
->target_info
);
10965 return target_remove_breakpoint (bl
->gdbarch
, &bl
->target_info
);
10969 bkpt_breakpoint_hit (const struct bp_location
*bl
,
10970 struct address_space
*aspace
, CORE_ADDR bp_addr
)
10972 struct breakpoint
*b
= bl
->owner
;
10974 if (!breakpoint_address_match (bl
->pspace
->aspace
, bl
->address
,
10978 if (overlay_debugging
/* unmapped overlay section */
10979 && section_is_overlay (bl
->section
)
10980 && !section_is_mapped (bl
->section
))
10987 bkpt_resources_needed (const struct bp_location
*bl
)
10989 gdb_assert (bl
->owner
->type
== bp_hardware_breakpoint
);
10994 static enum print_stop_action
10995 bkpt_print_it (bpstat bs
)
10997 struct breakpoint
*b
;
10998 const struct bp_location
*bl
;
11000 struct ui_out
*uiout
= current_uiout
;
11002 gdb_assert (bs
->bp_location_at
!= NULL
);
11004 bl
= bs
->bp_location_at
;
11005 b
= bs
->breakpoint_at
;
11007 bp_temp
= b
->disposition
== disp_del
;
11008 if (bl
->address
!= bl
->requested_address
)
11009 breakpoint_adjustment_warning (bl
->requested_address
,
11012 annotate_breakpoint (b
->number
);
11014 ui_out_text (uiout
, "\nTemporary breakpoint ");
11016 ui_out_text (uiout
, "\nBreakpoint ");
11017 if (ui_out_is_mi_like_p (uiout
))
11019 ui_out_field_string (uiout
, "reason",
11020 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
11021 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
11023 ui_out_field_int (uiout
, "bkptno", b
->number
);
11024 ui_out_text (uiout
, ", ");
11026 return PRINT_SRC_AND_LOC
;
11030 bkpt_print_mention (struct breakpoint
*b
)
11032 if (ui_out_is_mi_like_p (current_uiout
))
11037 case bp_breakpoint
:
11038 case bp_gnu_ifunc_resolver
:
11039 if (b
->disposition
== disp_del
)
11040 printf_filtered (_("Temporary breakpoint"));
11042 printf_filtered (_("Breakpoint"));
11043 printf_filtered (_(" %d"), b
->number
);
11044 if (b
->type
== bp_gnu_ifunc_resolver
)
11045 printf_filtered (_(" at gnu-indirect-function resolver"));
11047 case bp_hardware_breakpoint
:
11048 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
11056 bkpt_print_recreate (struct breakpoint
*tp
, struct ui_file
*fp
)
11058 if (tp
->type
== bp_breakpoint
&& tp
->disposition
== disp_del
)
11059 fprintf_unfiltered (fp
, "tbreak");
11060 else if (tp
->type
== bp_breakpoint
)
11061 fprintf_unfiltered (fp
, "break");
11062 else if (tp
->type
== bp_hardware_breakpoint
11063 && tp
->disposition
== disp_del
)
11064 fprintf_unfiltered (fp
, "thbreak");
11065 else if (tp
->type
== bp_hardware_breakpoint
)
11066 fprintf_unfiltered (fp
, "hbreak");
11068 internal_error (__FILE__
, __LINE__
,
11069 _("unhandled breakpoint type %d"), (int) tp
->type
);
11071 fprintf_unfiltered (fp
, " %s", tp
->addr_string
);
11072 print_recreate_thread (tp
, fp
);
11075 /* Virtual table for internal breakpoints. */
11078 internal_bkpt_re_set (struct breakpoint
*b
)
11082 /* Delete overlay event and longjmp master breakpoints; they
11083 will be reset later by breakpoint_re_set. */
11084 case bp_overlay_event
:
11085 case bp_longjmp_master
:
11086 case bp_std_terminate_master
:
11087 case bp_exception_master
:
11088 delete_breakpoint (b
);
11091 /* This breakpoint is special, it's set up when the inferior
11092 starts and we really don't want to touch it. */
11093 case bp_shlib_event
:
11095 /* Like bp_shlib_event, this breakpoint type is special. Once
11096 it is set up, we do not want to touch it. */
11097 case bp_thread_event
:
11103 internal_bkpt_check_status (bpstat bs
)
11105 /* We do not stop for these. */
11109 static enum print_stop_action
11110 internal_bkpt_print_it (bpstat bs
)
11112 struct ui_out
*uiout
= current_uiout
;
11113 struct breakpoint
*b
;
11115 b
= bs
->breakpoint_at
;
11119 case bp_shlib_event
:
11120 /* Did we stop because the user set the stop_on_solib_events
11121 variable? (If so, we report this as a generic, "Stopped due
11122 to shlib event" message.) */
11123 ui_out_text (uiout
, _("Stopped due to shared library event\n"));
11124 if (ui_out_is_mi_like_p (uiout
))
11125 ui_out_field_string (uiout
, "reason",
11126 async_reason_lookup (EXEC_ASYNC_SOLIB_EVENT
));
11129 case bp_thread_event
:
11130 /* Not sure how we will get here.
11131 GDB should not stop for these breakpoints. */
11132 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
11135 case bp_overlay_event
:
11136 /* By analogy with the thread event, GDB should not stop for these. */
11137 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
11140 case bp_longjmp_master
:
11141 /* These should never be enabled. */
11142 printf_filtered (_("Longjmp Master Breakpoint: gdb should not stop!\n"));
11145 case bp_std_terminate_master
:
11146 /* These should never be enabled. */
11147 printf_filtered (_("std::terminate Master Breakpoint: "
11148 "gdb should not stop!\n"));
11151 case bp_exception_master
:
11152 /* These should never be enabled. */
11153 printf_filtered (_("Exception Master Breakpoint: "
11154 "gdb should not stop!\n"));
11158 return PRINT_NOTHING
;
11162 internal_bkpt_print_mention (struct breakpoint
*b
)
11164 /* Nothing to mention. These breakpoints are internal. */
11167 /* Virtual table for momentary breakpoints */
11170 momentary_bkpt_re_set (struct breakpoint
*b
)
11172 /* Keep temporary breakpoints, which can be encountered when we step
11173 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
11174 Otherwise these should have been blown away via the cleanup chain
11175 or by breakpoint_init_inferior when we rerun the executable. */
11179 momentary_bkpt_check_status (bpstat bs
)
11181 /* Nothing. The point of these breakpoints is causing a stop. */
11184 static enum print_stop_action
11185 momentary_bkpt_print_it (bpstat bs
)
11187 struct ui_out
*uiout
= current_uiout
;
11189 if (ui_out_is_mi_like_p (uiout
))
11191 struct breakpoint
*b
= bs
->breakpoint_at
;
11196 ui_out_field_string
11198 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
11202 ui_out_field_string
11204 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
11209 return PRINT_UNKNOWN
;
11213 momentary_bkpt_print_mention (struct breakpoint
*b
)
11215 /* Nothing to mention. These breakpoints are internal. */
11218 /* The breakpoint_ops structure to be used in tracepoints. */
11221 tracepoint_re_set (struct breakpoint
*b
)
11223 breakpoint_re_set_default (b
);
11227 tracepoint_breakpoint_hit (const struct bp_location
*bl
,
11228 struct address_space
*aspace
, CORE_ADDR bp_addr
)
11230 /* By definition, the inferior does not report stops at
11236 tracepoint_print_one_detail (const struct breakpoint
*self
,
11237 struct ui_out
*uiout
)
11239 struct tracepoint
*tp
= (struct tracepoint
*) self
;
11240 if (tp
->static_trace_marker_id
)
11242 gdb_assert (self
->type
== bp_static_tracepoint
);
11244 ui_out_text (uiout
, "\tmarker id is ");
11245 ui_out_field_string (uiout
, "static-tracepoint-marker-string-id",
11246 tp
->static_trace_marker_id
);
11247 ui_out_text (uiout
, "\n");
11252 tracepoint_print_mention (struct breakpoint
*b
)
11254 if (ui_out_is_mi_like_p (current_uiout
))
11259 case bp_tracepoint
:
11260 printf_filtered (_("Tracepoint"));
11261 printf_filtered (_(" %d"), b
->number
);
11263 case bp_fast_tracepoint
:
11264 printf_filtered (_("Fast tracepoint"));
11265 printf_filtered (_(" %d"), b
->number
);
11267 case bp_static_tracepoint
:
11268 printf_filtered (_("Static tracepoint"));
11269 printf_filtered (_(" %d"), b
->number
);
11272 internal_error (__FILE__
, __LINE__
,
11273 _("unhandled tracepoint type %d"), (int) b
->type
);
11280 tracepoint_print_recreate (struct breakpoint
*self
, struct ui_file
*fp
)
11282 struct tracepoint
*tp
= (struct tracepoint
*) self
;
11284 if (self
->type
== bp_fast_tracepoint
)
11285 fprintf_unfiltered (fp
, "ftrace");
11286 if (self
->type
== bp_static_tracepoint
)
11287 fprintf_unfiltered (fp
, "strace");
11288 else if (self
->type
== bp_tracepoint
)
11289 fprintf_unfiltered (fp
, "trace");
11291 internal_error (__FILE__
, __LINE__
,
11292 _("unhandled tracepoint type %d"), (int) self
->type
);
11294 fprintf_unfiltered (fp
, " %s", self
->addr_string
);
11295 print_recreate_thread (self
, fp
);
11297 if (tp
->pass_count
)
11298 fprintf_unfiltered (fp
, " passcount %d\n", tp
->pass_count
);
11301 struct breakpoint_ops tracepoint_breakpoint_ops
;
11303 /* Delete a breakpoint and clean up all traces of it in the data
11307 delete_breakpoint (struct breakpoint
*bpt
)
11309 struct breakpoint
*b
;
11311 gdb_assert (bpt
!= NULL
);
11313 /* Has this bp already been deleted? This can happen because
11314 multiple lists can hold pointers to bp's. bpstat lists are
11317 One example of this happening is a watchpoint's scope bp. When
11318 the scope bp triggers, we notice that the watchpoint is out of
11319 scope, and delete it. We also delete its scope bp. But the
11320 scope bp is marked "auto-deleting", and is already on a bpstat.
11321 That bpstat is then checked for auto-deleting bp's, which are
11324 A real solution to this problem might involve reference counts in
11325 bp's, and/or giving them pointers back to their referencing
11326 bpstat's, and teaching delete_breakpoint to only free a bp's
11327 storage when no more references were extent. A cheaper bandaid
11329 if (bpt
->type
== bp_none
)
11332 /* At least avoid this stale reference until the reference counting
11333 of breakpoints gets resolved. */
11334 if (bpt
->related_breakpoint
!= bpt
)
11336 struct breakpoint
*related
;
11337 struct watchpoint
*w
;
11339 if (bpt
->type
== bp_watchpoint_scope
)
11340 w
= (struct watchpoint
*) bpt
->related_breakpoint
;
11341 else if (bpt
->related_breakpoint
->type
== bp_watchpoint_scope
)
11342 w
= (struct watchpoint
*) bpt
;
11346 watchpoint_del_at_next_stop (w
);
11348 /* Unlink bpt from the bpt->related_breakpoint ring. */
11349 for (related
= bpt
; related
->related_breakpoint
!= bpt
;
11350 related
= related
->related_breakpoint
);
11351 related
->related_breakpoint
= bpt
->related_breakpoint
;
11352 bpt
->related_breakpoint
= bpt
;
11355 /* watch_command_1 creates a watchpoint but only sets its number if
11356 update_watchpoint succeeds in creating its bp_locations. If there's
11357 a problem in that process, we'll be asked to delete the half-created
11358 watchpoint. In that case, don't announce the deletion. */
11360 observer_notify_breakpoint_deleted (bpt
);
11362 if (breakpoint_chain
== bpt
)
11363 breakpoint_chain
= bpt
->next
;
11365 ALL_BREAKPOINTS (b
)
11366 if (b
->next
== bpt
)
11368 b
->next
= bpt
->next
;
11372 /* Be sure no bpstat's are pointing at the breakpoint after it's
11374 /* FIXME, how can we find all bpstat's? We just check stop_bpstat
11375 in all threads for now. Note that we cannot just remove bpstats
11376 pointing at bpt from the stop_bpstat list entirely, as breakpoint
11377 commands are associated with the bpstat; if we remove it here,
11378 then the later call to bpstat_do_actions (&stop_bpstat); in
11379 event-top.c won't do anything, and temporary breakpoints with
11380 commands won't work. */
11382 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
11384 /* Now that breakpoint is removed from breakpoint list, update the
11385 global location list. This will remove locations that used to
11386 belong to this breakpoint. Do this before freeing the breakpoint
11387 itself, since remove_breakpoint looks at location's owner. It
11388 might be better design to have location completely
11389 self-contained, but it's not the case now. */
11390 update_global_location_list (0);
11392 bpt
->ops
->dtor (bpt
);
11393 /* On the chance that someone will soon try again to delete this
11394 same bp, we mark it as deleted before freeing its storage. */
11395 bpt
->type
= bp_none
;
11400 do_delete_breakpoint_cleanup (void *b
)
11402 delete_breakpoint (b
);
11406 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
11408 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
11411 /* Iterator function to call a user-provided callback function once
11412 for each of B and its related breakpoints. */
11415 iterate_over_related_breakpoints (struct breakpoint
*b
,
11416 void (*function
) (struct breakpoint
*,
11420 struct breakpoint
*related
;
11425 struct breakpoint
*next
;
11427 /* FUNCTION may delete RELATED. */
11428 next
= related
->related_breakpoint
;
11430 if (next
== related
)
11432 /* RELATED is the last ring entry. */
11433 function (related
, data
);
11435 /* FUNCTION may have deleted it, so we'd never reach back to
11436 B. There's nothing left to do anyway, so just break
11441 function (related
, data
);
11445 while (related
!= b
);
11449 do_delete_breakpoint (struct breakpoint
*b
, void *ignore
)
11451 delete_breakpoint (b
);
11454 /* A callback for map_breakpoint_numbers that calls
11455 delete_breakpoint. */
11458 do_map_delete_breakpoint (struct breakpoint
*b
, void *ignore
)
11460 iterate_over_related_breakpoints (b
, do_delete_breakpoint
, NULL
);
11464 delete_command (char *arg
, int from_tty
)
11466 struct breakpoint
*b
, *b_tmp
;
11472 int breaks_to_delete
= 0;
11474 /* Delete all breakpoints if no argument. Do not delete
11475 internal breakpoints, these have to be deleted with an
11476 explicit breakpoint number argument. */
11477 ALL_BREAKPOINTS (b
)
11478 if (user_breakpoint_p (b
))
11480 breaks_to_delete
= 1;
11484 /* Ask user only if there are some breakpoints to delete. */
11486 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
11488 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
11489 if (user_breakpoint_p (b
))
11490 delete_breakpoint (b
);
11494 map_breakpoint_numbers (arg
, do_map_delete_breakpoint
, NULL
);
11498 all_locations_are_pending (struct bp_location
*loc
)
11500 for (; loc
; loc
= loc
->next
)
11501 if (!loc
->shlib_disabled
)
11506 /* Subroutine of update_breakpoint_locations to simplify it.
11507 Return non-zero if multiple fns in list LOC have the same name.
11508 Null names are ignored. */
11511 ambiguous_names_p (struct bp_location
*loc
)
11513 struct bp_location
*l
;
11514 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
11515 (int (*) (const void *,
11516 const void *)) streq
,
11517 NULL
, xcalloc
, xfree
);
11519 for (l
= loc
; l
!= NULL
; l
= l
->next
)
11522 const char *name
= l
->function_name
;
11524 /* Allow for some names to be NULL, ignore them. */
11528 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
11530 /* NOTE: We can assume slot != NULL here because xcalloc never
11534 htab_delete (htab
);
11540 htab_delete (htab
);
11544 /* When symbols change, it probably means the sources changed as well,
11545 and it might mean the static tracepoint markers are no longer at
11546 the same address or line numbers they used to be at last we
11547 checked. Losing your static tracepoints whenever you rebuild is
11548 undesirable. This function tries to resync/rematch gdb static
11549 tracepoints with the markers on the target, for static tracepoints
11550 that have not been set by marker id. Static tracepoint that have
11551 been set by marker id are reset by marker id in breakpoint_re_set.
11554 1) For a tracepoint set at a specific address, look for a marker at
11555 the old PC. If one is found there, assume to be the same marker.
11556 If the name / string id of the marker found is different from the
11557 previous known name, assume that means the user renamed the marker
11558 in the sources, and output a warning.
11560 2) For a tracepoint set at a given line number, look for a marker
11561 at the new address of the old line number. If one is found there,
11562 assume to be the same marker. If the name / string id of the
11563 marker found is different from the previous known name, assume that
11564 means the user renamed the marker in the sources, and output a
11567 3) If a marker is no longer found at the same address or line, it
11568 may mean the marker no longer exists. But it may also just mean
11569 the code changed a bit. Maybe the user added a few lines of code
11570 that made the marker move up or down (in line number terms). Ask
11571 the target for info about the marker with the string id as we knew
11572 it. If found, update line number and address in the matching
11573 static tracepoint. This will get confused if there's more than one
11574 marker with the same ID (possible in UST, although unadvised
11575 precisely because it confuses tools). */
11577 static struct symtab_and_line
11578 update_static_tracepoint (struct breakpoint
*b
, struct symtab_and_line sal
)
11580 struct tracepoint
*tp
= (struct tracepoint
*) b
;
11581 struct static_tracepoint_marker marker
;
11587 find_line_pc (sal
.symtab
, sal
.line
, &pc
);
11589 if (target_static_tracepoint_marker_at (pc
, &marker
))
11591 if (strcmp (tp
->static_trace_marker_id
, marker
.str_id
) != 0)
11592 warning (_("static tracepoint %d changed probed marker from %s to %s"),
11594 tp
->static_trace_marker_id
, marker
.str_id
);
11596 xfree (tp
->static_trace_marker_id
);
11597 tp
->static_trace_marker_id
= xstrdup (marker
.str_id
);
11598 release_static_tracepoint_marker (&marker
);
11603 /* Old marker wasn't found on target at lineno. Try looking it up
11605 if (!sal
.explicit_pc
11607 && sal
.symtab
!= NULL
11608 && tp
->static_trace_marker_id
!= NULL
)
11610 VEC(static_tracepoint_marker_p
) *markers
;
11613 = target_static_tracepoint_markers_by_strid (tp
->static_trace_marker_id
);
11615 if (!VEC_empty(static_tracepoint_marker_p
, markers
))
11617 struct symtab_and_line sal
;
11618 struct symbol
*sym
;
11619 struct static_tracepoint_marker
*marker
;
11620 struct ui_out
*uiout
= current_uiout
;
11622 marker
= VEC_index (static_tracepoint_marker_p
, markers
, 0);
11624 xfree (tp
->static_trace_marker_id
);
11625 tp
->static_trace_marker_id
= xstrdup (marker
->str_id
);
11627 warning (_("marker for static tracepoint %d (%s) not "
11628 "found at previous line number"),
11629 b
->number
, tp
->static_trace_marker_id
);
11633 sal
.pc
= marker
->address
;
11635 sal
= find_pc_line (marker
->address
, 0);
11636 sym
= find_pc_sect_function (marker
->address
, NULL
);
11637 ui_out_text (uiout
, "Now in ");
11640 ui_out_field_string (uiout
, "func",
11641 SYMBOL_PRINT_NAME (sym
));
11642 ui_out_text (uiout
, " at ");
11644 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
11645 ui_out_text (uiout
, ":");
11647 if (ui_out_is_mi_like_p (uiout
))
11649 char *fullname
= symtab_to_fullname (sal
.symtab
);
11652 ui_out_field_string (uiout
, "fullname", fullname
);
11655 ui_out_field_int (uiout
, "line", sal
.line
);
11656 ui_out_text (uiout
, "\n");
11658 b
->loc
->line_number
= sal
.line
;
11660 xfree (b
->loc
->source_file
);
11662 b
->loc
->source_file
= xstrdup (sal
.symtab
->filename
);
11664 b
->loc
->source_file
= NULL
;
11666 xfree (b
->addr_string
);
11667 b
->addr_string
= xstrprintf ("%s:%d",
11668 sal
.symtab
->filename
,
11669 b
->loc
->line_number
);
11671 /* Might be nice to check if function changed, and warn if
11674 release_static_tracepoint_marker (marker
);
11680 /* Returns 1 iff locations A and B are sufficiently same that
11681 we don't need to report breakpoint as changed. */
11684 locations_are_equal (struct bp_location
*a
, struct bp_location
*b
)
11688 if (a
->address
!= b
->address
)
11691 if (a
->shlib_disabled
!= b
->shlib_disabled
)
11694 if (a
->enabled
!= b
->enabled
)
11701 if ((a
== NULL
) != (b
== NULL
))
11707 /* Create new breakpoint locations for B (a hardware or software breakpoint)
11708 based on SALS and SALS_END. If SALS_END.NELTS is not zero, then B is
11709 a ranged breakpoint. */
11712 update_breakpoint_locations (struct breakpoint
*b
,
11713 struct symtabs_and_lines sals
,
11714 struct symtabs_and_lines sals_end
)
11717 struct bp_location
*existing_locations
= b
->loc
;
11719 if (sals_end
.nelts
!= 0 && (sals
.nelts
!= 1 || sals_end
.nelts
!= 1))
11721 /* Ranged breakpoints have only one start location and one end
11723 b
->enable_state
= bp_disabled
;
11724 update_global_location_list (1);
11725 printf_unfiltered (_("Could not reset ranged breakpoint %d: "
11726 "multiple locations found\n"),
11731 /* If there's no new locations, and all existing locations are
11732 pending, don't do anything. This optimizes the common case where
11733 all locations are in the same shared library, that was unloaded.
11734 We'd like to retain the location, so that when the library is
11735 loaded again, we don't loose the enabled/disabled status of the
11736 individual locations. */
11737 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
11742 for (i
= 0; i
< sals
.nelts
; ++i
)
11744 struct bp_location
*new_loc
;
11746 switch_to_program_space_and_thread (sals
.sals
[i
].pspace
);
11748 new_loc
= add_location_to_breakpoint (b
, &(sals
.sals
[i
]));
11750 /* Reparse conditions, they might contain references to the
11752 if (b
->cond_string
!= NULL
)
11755 struct gdb_exception e
;
11757 s
= b
->cond_string
;
11758 TRY_CATCH (e
, RETURN_MASK_ERROR
)
11760 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
11765 warning (_("failed to reevaluate condition "
11766 "for breakpoint %d: %s"),
11767 b
->number
, e
.message
);
11768 new_loc
->enabled
= 0;
11772 if (sals_end
.nelts
)
11774 CORE_ADDR end
= find_breakpoint_range_end (sals_end
.sals
[0]);
11776 new_loc
->length
= end
- sals
.sals
[0].pc
+ 1;
11780 /* Update locations of permanent breakpoints. */
11781 if (b
->enable_state
== bp_permanent
)
11782 make_breakpoint_permanent (b
);
11784 /* If possible, carry over 'disable' status from existing
11787 struct bp_location
*e
= existing_locations
;
11788 /* If there are multiple breakpoints with the same function name,
11789 e.g. for inline functions, comparing function names won't work.
11790 Instead compare pc addresses; this is just a heuristic as things
11791 may have moved, but in practice it gives the correct answer
11792 often enough until a better solution is found. */
11793 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
11795 for (; e
; e
= e
->next
)
11797 if (!e
->enabled
&& e
->function_name
)
11799 struct bp_location
*l
= b
->loc
;
11800 if (have_ambiguous_names
)
11802 for (; l
; l
= l
->next
)
11803 if (breakpoint_locations_match (e
, l
))
11811 for (; l
; l
= l
->next
)
11812 if (l
->function_name
11813 && strcmp (e
->function_name
, l
->function_name
) == 0)
11823 if (!locations_are_equal (existing_locations
, b
->loc
))
11824 observer_notify_breakpoint_modified (b
);
11826 update_global_location_list (1);
11829 /* Find the SaL locations corresponding to the given ADDR_STRING.
11830 On return, FOUND will be 1 if any SaL was found, zero otherwise. */
11832 static struct symtabs_and_lines
11833 addr_string_to_sals (struct breakpoint
*b
, char *addr_string
, int *found
)
11837 struct symtabs_and_lines sals
= {0};
11838 volatile struct gdb_exception e
;
11841 marker_spec
= b
->type
== bp_static_tracepoint
&& is_marker_spec (s
);
11843 TRY_CATCH (e
, RETURN_MASK_ERROR
)
11847 struct tracepoint
*tp
= (struct tracepoint
*) b
;
11849 sals
= decode_static_tracepoint_spec (&s
);
11850 if (sals
.nelts
> tp
->static_trace_marker_id_idx
)
11852 sals
.sals
[0] = sals
.sals
[tp
->static_trace_marker_id_idx
];
11856 error (_("marker %s not found"), tp
->static_trace_marker_id
);
11860 struct linespec_result canonical
;
11862 init_linespec_result (&canonical
);
11863 decode_line_full (&s
, DECODE_LINE_FUNFIRSTLINE
,
11864 (struct symtab
*) NULL
, 0,
11865 &canonical
, multiple_symbols_all
,
11868 /* We should get 0 or 1 resulting SALs. */
11869 gdb_assert (VEC_length (linespec_sals
, canonical
.sals
) < 2);
11871 if (VEC_length (linespec_sals
, canonical
.sals
) > 0)
11873 struct linespec_sals
*lsal
;
11875 lsal
= VEC_index (linespec_sals
, canonical
.sals
, 0);
11877 /* Arrange it so the destructor does not free the
11879 lsal
->sals
.sals
= NULL
;
11882 destroy_linespec_result (&canonical
);
11887 int not_found_and_ok
= 0;
11888 /* For pending breakpoints, it's expected that parsing will
11889 fail until the right shared library is loaded. User has
11890 already told to create pending breakpoints and don't need
11891 extra messages. If breakpoint is in bp_shlib_disabled
11892 state, then user already saw the message about that
11893 breakpoint being disabled, and don't want to see more
11895 if (e
.error
== NOT_FOUND_ERROR
11896 && (b
->condition_not_parsed
11897 || (b
->loc
&& b
->loc
->shlib_disabled
)
11898 || (b
->loc
&& b
->loc
->pspace
->executing_startup
)
11899 || b
->enable_state
== bp_disabled
))
11900 not_found_and_ok
= 1;
11902 if (!not_found_and_ok
)
11904 /* We surely don't want to warn about the same breakpoint
11905 10 times. One solution, implemented here, is disable
11906 the breakpoint on error. Another solution would be to
11907 have separate 'warning emitted' flag. Since this
11908 happens only when a binary has changed, I don't know
11909 which approach is better. */
11910 b
->enable_state
= bp_disabled
;
11911 throw_exception (e
);
11915 if (e
.reason
== 0 || e
.error
!= NOT_FOUND_ERROR
)
11919 for (i
= 0; i
< sals
.nelts
; ++i
)
11920 resolve_sal_pc (&sals
.sals
[i
]);
11921 if (b
->condition_not_parsed
&& s
&& s
[0])
11923 char *cond_string
= 0;
11927 find_condition_and_thread (s
, sals
.sals
[0].pc
,
11928 &cond_string
, &thread
, &task
);
11930 b
->cond_string
= cond_string
;
11931 b
->thread
= thread
;
11933 b
->condition_not_parsed
= 0;
11936 if (b
->type
== bp_static_tracepoint
&& !marker_spec
)
11937 sals
.sals
[0] = update_static_tracepoint (b
, sals
.sals
[0]);
11947 /* The default re_set method, for typical hardware or software
11948 breakpoints. Reevaluate the breakpoint and recreate its
11952 breakpoint_re_set_default (struct breakpoint
*b
)
11955 struct symtabs_and_lines sals
, sals_end
;
11956 struct symtabs_and_lines expanded
= {0};
11957 struct symtabs_and_lines expanded_end
= {0};
11959 sals
= addr_string_to_sals (b
, b
->addr_string
, &found
);
11962 make_cleanup (xfree
, sals
.sals
);
11966 if (b
->addr_string_range_end
)
11968 sals_end
= addr_string_to_sals (b
, b
->addr_string_range_end
, &found
);
11971 make_cleanup (xfree
, sals_end
.sals
);
11972 expanded_end
= sals_end
;
11976 update_breakpoint_locations (b
, expanded
, expanded_end
);
11979 /* Prepare the global context for a re-set of breakpoint B. */
11981 static struct cleanup
*
11982 prepare_re_set_context (struct breakpoint
*b
)
11984 struct cleanup
*cleanups
;
11986 input_radix
= b
->input_radix
;
11987 cleanups
= save_current_space_and_thread ();
11988 if (b
->pspace
!= NULL
)
11989 switch_to_program_space_and_thread (b
->pspace
);
11990 set_language (b
->language
);
11995 /* Reset a breakpoint given it's struct breakpoint * BINT.
11996 The value we return ends up being the return value from catch_errors.
11997 Unused in this case. */
12000 breakpoint_re_set_one (void *bint
)
12002 /* Get past catch_errs. */
12003 struct breakpoint
*b
= (struct breakpoint
*) bint
;
12004 struct cleanup
*cleanups
;
12006 cleanups
= prepare_re_set_context (b
);
12007 b
->ops
->re_set (b
);
12008 do_cleanups (cleanups
);
12012 /* Re-set all breakpoints after symbols have been re-loaded. */
12014 breakpoint_re_set (void)
12016 struct breakpoint
*b
, *b_tmp
;
12017 enum language save_language
;
12018 int save_input_radix
;
12019 struct cleanup
*old_chain
;
12021 save_language
= current_language
->la_language
;
12022 save_input_radix
= input_radix
;
12023 old_chain
= save_current_program_space ();
12025 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
12027 /* Format possible error msg. */
12028 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
12030 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
12031 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
12032 do_cleanups (cleanups
);
12034 set_language (save_language
);
12035 input_radix
= save_input_radix
;
12037 jit_breakpoint_re_set ();
12039 do_cleanups (old_chain
);
12041 create_overlay_event_breakpoint ();
12042 create_longjmp_master_breakpoint ();
12043 create_std_terminate_master_breakpoint ();
12044 create_exception_master_breakpoint ();
12046 /* While we're at it, reset the skip list too. */
12050 /* Reset the thread number of this breakpoint:
12052 - If the breakpoint is for all threads, leave it as-is.
12053 - Else, reset it to the current thread for inferior_ptid. */
12055 breakpoint_re_set_thread (struct breakpoint
*b
)
12057 if (b
->thread
!= -1)
12059 if (in_thread_list (inferior_ptid
))
12060 b
->thread
= pid_to_thread_id (inferior_ptid
);
12062 /* We're being called after following a fork. The new fork is
12063 selected as current, and unless this was a vfork will have a
12064 different program space from the original thread. Reset that
12066 b
->loc
->pspace
= current_program_space
;
12070 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
12071 If from_tty is nonzero, it prints a message to that effect,
12072 which ends with a period (no newline). */
12075 set_ignore_count (int bptnum
, int count
, int from_tty
)
12077 struct breakpoint
*b
;
12082 ALL_BREAKPOINTS (b
)
12083 if (b
->number
== bptnum
)
12085 if (is_tracepoint (b
))
12087 if (from_tty
&& count
!= 0)
12088 printf_filtered (_("Ignore count ignored for tracepoint %d."),
12093 b
->ignore_count
= count
;
12097 printf_filtered (_("Will stop next time "
12098 "breakpoint %d is reached."),
12100 else if (count
== 1)
12101 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
12104 printf_filtered (_("Will ignore next %d "
12105 "crossings of breakpoint %d."),
12108 breakpoints_changed ();
12109 observer_notify_breakpoint_modified (b
);
12113 error (_("No breakpoint number %d."), bptnum
);
12116 /* Command to set ignore-count of breakpoint N to COUNT. */
12119 ignore_command (char *args
, int from_tty
)
12125 error_no_arg (_("a breakpoint number"));
12127 num
= get_number (&p
);
12129 error (_("bad breakpoint number: '%s'"), args
);
12131 error (_("Second argument (specified ignore-count) is missing."));
12133 set_ignore_count (num
,
12134 longest_to_int (value_as_long (parse_and_eval (p
))),
12137 printf_filtered ("\n");
12140 /* Call FUNCTION on each of the breakpoints
12141 whose numbers are given in ARGS. */
12144 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*,
12149 struct breakpoint
*b
, *tmp
;
12151 struct get_number_or_range_state state
;
12154 error_no_arg (_("one or more breakpoint numbers"));
12156 init_number_or_range (&state
, args
);
12158 while (!state
.finished
)
12160 char *p
= state
.string
;
12164 num
= get_number_or_range (&state
);
12167 warning (_("bad breakpoint number at or near '%s'"), p
);
12171 ALL_BREAKPOINTS_SAFE (b
, tmp
)
12172 if (b
->number
== num
)
12175 function (b
, data
);
12179 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
12184 static struct bp_location
*
12185 find_location_by_number (char *number
)
12187 char *dot
= strchr (number
, '.');
12191 struct breakpoint
*b
;
12192 struct bp_location
*loc
;
12197 bp_num
= get_number (&p1
);
12199 error (_("Bad breakpoint number '%s'"), number
);
12201 ALL_BREAKPOINTS (b
)
12202 if (b
->number
== bp_num
)
12207 if (!b
|| b
->number
!= bp_num
)
12208 error (_("Bad breakpoint number '%s'"), number
);
12211 loc_num
= get_number (&p1
);
12213 error (_("Bad breakpoint location number '%s'"), number
);
12217 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
12220 error (_("Bad breakpoint location number '%s'"), dot
+1);
12226 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
12227 If from_tty is nonzero, it prints a message to that effect,
12228 which ends with a period (no newline). */
12231 disable_breakpoint (struct breakpoint
*bpt
)
12233 /* Never disable a watchpoint scope breakpoint; we want to
12234 hit them when we leave scope so we can delete both the
12235 watchpoint and its scope breakpoint at that time. */
12236 if (bpt
->type
== bp_watchpoint_scope
)
12239 /* You can't disable permanent breakpoints. */
12240 if (bpt
->enable_state
== bp_permanent
)
12243 bpt
->enable_state
= bp_disabled
;
12245 if (target_supports_enable_disable_tracepoint ()
12246 && current_trace_status ()->running
&& is_tracepoint (bpt
))
12248 struct bp_location
*location
;
12250 for (location
= bpt
->loc
; location
; location
= location
->next
)
12251 target_disable_tracepoint (location
);
12254 update_global_location_list (0);
12256 observer_notify_breakpoint_modified (bpt
);
12259 /* A callback for iterate_over_related_breakpoints. */
12262 do_disable_breakpoint (struct breakpoint
*b
, void *ignore
)
12264 disable_breakpoint (b
);
12267 /* A callback for map_breakpoint_numbers that calls
12268 disable_breakpoint. */
12271 do_map_disable_breakpoint (struct breakpoint
*b
, void *ignore
)
12273 iterate_over_related_breakpoints (b
, do_disable_breakpoint
, NULL
);
12277 disable_command (char *args
, int from_tty
)
12281 struct breakpoint
*bpt
;
12283 ALL_BREAKPOINTS (bpt
)
12284 if (user_breakpoint_p (bpt
))
12285 disable_breakpoint (bpt
);
12287 else if (strchr (args
, '.'))
12289 struct bp_location
*loc
= find_location_by_number (args
);
12293 if (target_supports_enable_disable_tracepoint ()
12294 && current_trace_status ()->running
&& loc
->owner
12295 && is_tracepoint (loc
->owner
))
12296 target_disable_tracepoint (loc
);
12298 update_global_location_list (0);
12301 map_breakpoint_numbers (args
, do_map_disable_breakpoint
, NULL
);
12305 enable_breakpoint_disp (struct breakpoint
*bpt
, enum bpdisp disposition
)
12307 int target_resources_ok
;
12309 if (bpt
->type
== bp_hardware_breakpoint
)
12312 i
= hw_breakpoint_used_count ();
12313 target_resources_ok
=
12314 target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
12316 if (target_resources_ok
== 0)
12317 error (_("No hardware breakpoint support in the target."));
12318 else if (target_resources_ok
< 0)
12319 error (_("Hardware breakpoints used exceeds limit."));
12322 if (is_watchpoint (bpt
))
12324 /* Initialize it just to avoid a GCC false warning. */
12325 enum enable_state orig_enable_state
= 0;
12326 struct gdb_exception e
;
12328 TRY_CATCH (e
, RETURN_MASK_ALL
)
12330 struct watchpoint
*w
= (struct watchpoint
*) bpt
;
12332 orig_enable_state
= bpt
->enable_state
;
12333 bpt
->enable_state
= bp_enabled
;
12334 update_watchpoint (w
, 1 /* reparse */);
12338 bpt
->enable_state
= orig_enable_state
;
12339 exception_fprintf (gdb_stderr
, e
, _("Cannot enable watchpoint %d: "),
12345 if (bpt
->enable_state
!= bp_permanent
)
12346 bpt
->enable_state
= bp_enabled
;
12348 if (target_supports_enable_disable_tracepoint ()
12349 && current_trace_status ()->running
&& is_tracepoint (bpt
))
12351 struct bp_location
*location
;
12353 for (location
= bpt
->loc
; location
; location
= location
->next
)
12354 target_enable_tracepoint (location
);
12357 bpt
->disposition
= disposition
;
12358 update_global_location_list (1);
12359 breakpoints_changed ();
12361 observer_notify_breakpoint_modified (bpt
);
12366 enable_breakpoint (struct breakpoint
*bpt
)
12368 enable_breakpoint_disp (bpt
, bpt
->disposition
);
12372 do_enable_breakpoint (struct breakpoint
*bpt
, void *arg
)
12374 enable_breakpoint (bpt
);
12377 /* A callback for map_breakpoint_numbers that calls
12378 enable_breakpoint. */
12381 do_map_enable_breakpoint (struct breakpoint
*b
, void *ignore
)
12383 iterate_over_related_breakpoints (b
, do_enable_breakpoint
, NULL
);
12386 /* The enable command enables the specified breakpoints (or all defined
12387 breakpoints) so they once again become (or continue to be) effective
12388 in stopping the inferior. */
12391 enable_command (char *args
, int from_tty
)
12395 struct breakpoint
*bpt
;
12397 ALL_BREAKPOINTS (bpt
)
12398 if (user_breakpoint_p (bpt
))
12399 enable_breakpoint (bpt
);
12401 else if (strchr (args
, '.'))
12403 struct bp_location
*loc
= find_location_by_number (args
);
12407 if (target_supports_enable_disable_tracepoint ()
12408 && current_trace_status ()->running
&& loc
->owner
12409 && is_tracepoint (loc
->owner
))
12410 target_enable_tracepoint (loc
);
12412 update_global_location_list (1);
12415 map_breakpoint_numbers (args
, do_map_enable_breakpoint
, NULL
);
12419 do_enable_breakpoint_disp (struct breakpoint
*bpt
, void *arg
)
12421 enum bpdisp disp
= *(enum bpdisp
*) arg
;
12423 enable_breakpoint_disp (bpt
, disp
);
12427 do_map_enable_once_breakpoint (struct breakpoint
*bpt
, void *ignore
)
12429 enum bpdisp disp
= disp_disable
;
12431 iterate_over_related_breakpoints (bpt
, do_enable_breakpoint_disp
, &disp
);
12435 enable_once_command (char *args
, int from_tty
)
12437 map_breakpoint_numbers (args
, do_map_enable_once_breakpoint
, NULL
);
12441 do_map_enable_delete_breakpoint (struct breakpoint
*bpt
, void *ignore
)
12443 enum bpdisp disp
= disp_del
;
12445 iterate_over_related_breakpoints (bpt
, do_enable_breakpoint_disp
, &disp
);
12449 enable_delete_command (char *args
, int from_tty
)
12451 map_breakpoint_numbers (args
, do_map_enable_delete_breakpoint
, NULL
);
12455 set_breakpoint_cmd (char *args
, int from_tty
)
12460 show_breakpoint_cmd (char *args
, int from_tty
)
12464 /* Invalidate last known value of any hardware watchpoint if
12465 the memory which that value represents has been written to by
12469 invalidate_bp_value_on_memory_change (CORE_ADDR addr
, int len
,
12470 const bfd_byte
*data
)
12472 struct breakpoint
*bp
;
12474 ALL_BREAKPOINTS (bp
)
12475 if (bp
->enable_state
== bp_enabled
12476 && bp
->type
== bp_hardware_watchpoint
)
12478 struct watchpoint
*wp
= (struct watchpoint
*) bp
;
12480 if (wp
->val_valid
&& wp
->val
)
12482 struct bp_location
*loc
;
12484 for (loc
= bp
->loc
; loc
!= NULL
; loc
= loc
->next
)
12485 if (loc
->loc_type
== bp_loc_hardware_watchpoint
12486 && loc
->address
+ loc
->length
> addr
12487 && addr
+ len
> loc
->address
)
12489 value_free (wp
->val
);
12497 /* Use the last displayed codepoint's values, or nothing
12498 if they aren't valid. */
12500 struct symtabs_and_lines
12501 decode_line_spec_1 (char *string
, int flags
)
12503 struct symtabs_and_lines sals
;
12506 error (_("Empty line specification."));
12507 if (last_displayed_sal_is_valid ())
12508 sals
= decode_line_1 (&string
, flags
,
12509 get_last_displayed_symtab (),
12510 get_last_displayed_line ());
12512 sals
= decode_line_1 (&string
, flags
, (struct symtab
*) NULL
, 0);
12514 error (_("Junk at end of line specification: %s"), string
);
12518 /* Create and insert a raw software breakpoint at PC. Return an
12519 identifier, which should be used to remove the breakpoint later.
12520 In general, places which call this should be using something on the
12521 breakpoint chain instead; this function should be eliminated
12525 deprecated_insert_raw_breakpoint (struct gdbarch
*gdbarch
,
12526 struct address_space
*aspace
, CORE_ADDR pc
)
12528 struct bp_target_info
*bp_tgt
;
12530 bp_tgt
= XZALLOC (struct bp_target_info
);
12532 bp_tgt
->placed_address_space
= aspace
;
12533 bp_tgt
->placed_address
= pc
;
12535 if (target_insert_breakpoint (gdbarch
, bp_tgt
) != 0)
12537 /* Could not insert the breakpoint. */
12545 /* Remove a breakpoint BP inserted by
12546 deprecated_insert_raw_breakpoint. */
12549 deprecated_remove_raw_breakpoint (struct gdbarch
*gdbarch
, void *bp
)
12551 struct bp_target_info
*bp_tgt
= bp
;
12554 ret
= target_remove_breakpoint (gdbarch
, bp_tgt
);
12560 /* One (or perhaps two) breakpoints used for software single
12563 static void *single_step_breakpoints
[2];
12564 static struct gdbarch
*single_step_gdbarch
[2];
12566 /* Create and insert a breakpoint for software single step. */
12569 insert_single_step_breakpoint (struct gdbarch
*gdbarch
,
12570 struct address_space
*aspace
,
12575 if (single_step_breakpoints
[0] == NULL
)
12577 bpt_p
= &single_step_breakpoints
[0];
12578 single_step_gdbarch
[0] = gdbarch
;
12582 gdb_assert (single_step_breakpoints
[1] == NULL
);
12583 bpt_p
= &single_step_breakpoints
[1];
12584 single_step_gdbarch
[1] = gdbarch
;
12587 /* NOTE drow/2006-04-11: A future improvement to this function would
12588 be to only create the breakpoints once, and actually put them on
12589 the breakpoint chain. That would let us use set_raw_breakpoint.
12590 We could adjust the addresses each time they were needed. Doing
12591 this requires corresponding changes elsewhere where single step
12592 breakpoints are handled, however. So, for now, we use this. */
12594 *bpt_p
= deprecated_insert_raw_breakpoint (gdbarch
, aspace
, next_pc
);
12595 if (*bpt_p
== NULL
)
12596 error (_("Could not insert single-step breakpoint at %s"),
12597 paddress (gdbarch
, next_pc
));
12600 /* Check if the breakpoints used for software single stepping
12601 were inserted or not. */
12604 single_step_breakpoints_inserted (void)
12606 return (single_step_breakpoints
[0] != NULL
12607 || single_step_breakpoints
[1] != NULL
);
12610 /* Remove and delete any breakpoints used for software single step. */
12613 remove_single_step_breakpoints (void)
12615 gdb_assert (single_step_breakpoints
[0] != NULL
);
12617 /* See insert_single_step_breakpoint for more about this deprecated
12619 deprecated_remove_raw_breakpoint (single_step_gdbarch
[0],
12620 single_step_breakpoints
[0]);
12621 single_step_gdbarch
[0] = NULL
;
12622 single_step_breakpoints
[0] = NULL
;
12624 if (single_step_breakpoints
[1] != NULL
)
12626 deprecated_remove_raw_breakpoint (single_step_gdbarch
[1],
12627 single_step_breakpoints
[1]);
12628 single_step_gdbarch
[1] = NULL
;
12629 single_step_breakpoints
[1] = NULL
;
12633 /* Delete software single step breakpoints without removing them from
12634 the inferior. This is intended to be used if the inferior's address
12635 space where they were inserted is already gone, e.g. after exit or
12639 cancel_single_step_breakpoints (void)
12643 for (i
= 0; i
< 2; i
++)
12644 if (single_step_breakpoints
[i
])
12646 xfree (single_step_breakpoints
[i
]);
12647 single_step_breakpoints
[i
] = NULL
;
12648 single_step_gdbarch
[i
] = NULL
;
12652 /* Detach software single-step breakpoints from INFERIOR_PTID without
12656 detach_single_step_breakpoints (void)
12660 for (i
= 0; i
< 2; i
++)
12661 if (single_step_breakpoints
[i
])
12662 target_remove_breakpoint (single_step_gdbarch
[i
],
12663 single_step_breakpoints
[i
]);
12666 /* Check whether a software single-step breakpoint is inserted at
12670 single_step_breakpoint_inserted_here_p (struct address_space
*aspace
,
12675 for (i
= 0; i
< 2; i
++)
12677 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
12679 && breakpoint_address_match (bp_tgt
->placed_address_space
,
12680 bp_tgt
->placed_address
,
12688 /* Returns 0 if 'bp' is NOT a syscall catchpoint,
12689 non-zero otherwise. */
12691 is_syscall_catchpoint_enabled (struct breakpoint
*bp
)
12693 if (syscall_catchpoint_p (bp
)
12694 && bp
->enable_state
!= bp_disabled
12695 && bp
->enable_state
!= bp_call_disabled
)
12702 catch_syscall_enabled (void)
12704 struct inferior
*inf
= current_inferior ();
12706 return inf
->total_syscalls_count
!= 0;
12710 catching_syscall_number (int syscall_number
)
12712 struct breakpoint
*bp
;
12714 ALL_BREAKPOINTS (bp
)
12715 if (is_syscall_catchpoint_enabled (bp
))
12717 struct syscall_catchpoint
*c
= (struct syscall_catchpoint
*) bp
;
12719 if (c
->syscalls_to_be_caught
)
12723 VEC_iterate (int, c
->syscalls_to_be_caught
, i
, iter
);
12725 if (syscall_number
== iter
)
12735 /* Complete syscall names. Used by "catch syscall". */
12737 catch_syscall_completer (struct cmd_list_element
*cmd
,
12738 char *text
, char *word
)
12740 const char **list
= get_syscall_names ();
12742 = (list
== NULL
) ? NULL
: complete_on_enum (list
, text
, word
);
12748 /* Tracepoint-specific operations. */
12750 /* Set tracepoint count to NUM. */
12752 set_tracepoint_count (int num
)
12754 tracepoint_count
= num
;
12755 set_internalvar_integer (lookup_internalvar ("tpnum"), num
);
12759 trace_command (char *arg
, int from_tty
)
12761 if (create_breakpoint (get_current_arch (),
12763 NULL
, 0, 1 /* parse arg */,
12765 bp_tracepoint
/* type_wanted */,
12766 0 /* Ignore count */,
12767 pending_break_support
,
12768 &tracepoint_breakpoint_ops
,
12772 set_tracepoint_count (breakpoint_count
);
12776 ftrace_command (char *arg
, int from_tty
)
12778 if (create_breakpoint (get_current_arch (),
12780 NULL
, 0, 1 /* parse arg */,
12782 bp_fast_tracepoint
/* type_wanted */,
12783 0 /* Ignore count */,
12784 pending_break_support
,
12785 &tracepoint_breakpoint_ops
,
12789 set_tracepoint_count (breakpoint_count
);
12792 /* strace command implementation. Creates a static tracepoint. */
12795 strace_command (char *arg
, int from_tty
)
12797 if (create_breakpoint (get_current_arch (),
12799 NULL
, 0, 1 /* parse arg */,
12801 bp_static_tracepoint
/* type_wanted */,
12802 0 /* Ignore count */,
12803 pending_break_support
,
12804 &tracepoint_breakpoint_ops
,
12808 set_tracepoint_count (breakpoint_count
);
12811 /* Set up a fake reader function that gets command lines from a linked
12812 list that was acquired during tracepoint uploading. */
12814 static struct uploaded_tp
*this_utp
;
12815 static int next_cmd
;
12818 read_uploaded_action (void)
12822 VEC_iterate (char_ptr
, this_utp
->cmd_strings
, next_cmd
, rslt
);
12829 /* Given information about a tracepoint as recorded on a target (which
12830 can be either a live system or a trace file), attempt to create an
12831 equivalent GDB tracepoint. This is not a reliable process, since
12832 the target does not necessarily have all the information used when
12833 the tracepoint was originally defined. */
12835 struct tracepoint
*
12836 create_tracepoint_from_upload (struct uploaded_tp
*utp
)
12838 char *addr_str
, small_buf
[100];
12839 struct tracepoint
*tp
;
12841 if (utp
->at_string
)
12842 addr_str
= utp
->at_string
;
12845 /* In the absence of a source location, fall back to raw
12846 address. Since there is no way to confirm that the address
12847 means the same thing as when the trace was started, warn the
12849 warning (_("Uploaded tracepoint %d has no "
12850 "source location, using raw address"),
12852 sprintf (small_buf
, "*%s", hex_string (utp
->addr
));
12853 addr_str
= small_buf
;
12856 /* There's not much we can do with a sequence of bytecodes. */
12857 if (utp
->cond
&& !utp
->cond_string
)
12858 warning (_("Uploaded tracepoint %d condition "
12859 "has no source form, ignoring it"),
12862 if (!create_breakpoint (get_current_arch (),
12864 utp
->cond_string
, -1, 0 /* parse cond/thread */,
12866 utp
->type
/* type_wanted */,
12867 0 /* Ignore count */,
12868 pending_break_support
,
12869 &tracepoint_breakpoint_ops
,
12871 utp
->enabled
/* enabled */,
12875 set_tracepoint_count (breakpoint_count
);
12877 /* Get the tracepoint we just created. */
12878 tp
= get_tracepoint (tracepoint_count
);
12879 gdb_assert (tp
!= NULL
);
12883 sprintf (small_buf
, "%d %d", utp
->pass
, tp
->base
.number
);
12885 trace_pass_command (small_buf
, 0);
12888 /* If we have uploaded versions of the original commands, set up a
12889 special-purpose "reader" function and call the usual command line
12890 reader, then pass the result to the breakpoint command-setting
12892 if (!VEC_empty (char_ptr
, utp
->cmd_strings
))
12894 struct command_line
*cmd_list
;
12899 cmd_list
= read_command_lines_1 (read_uploaded_action
, 1, NULL
, NULL
);
12901 breakpoint_set_commands (&tp
->base
, cmd_list
);
12903 else if (!VEC_empty (char_ptr
, utp
->actions
)
12904 || !VEC_empty (char_ptr
, utp
->step_actions
))
12905 warning (_("Uploaded tracepoint %d actions "
12906 "have no source form, ignoring them"),
12909 /* Copy any status information that might be available. */
12910 tp
->base
.hit_count
= utp
->hit_count
;
12911 tp
->traceframe_usage
= utp
->traceframe_usage
;
12916 /* Print information on tracepoint number TPNUM_EXP, or all if
12920 tracepoints_info (char *args
, int from_tty
)
12922 struct ui_out
*uiout
= current_uiout
;
12925 num_printed
= breakpoint_1 (args
, 0, is_tracepoint
);
12927 if (num_printed
== 0)
12929 if (args
== NULL
|| *args
== '\0')
12930 ui_out_message (uiout
, 0, "No tracepoints.\n");
12932 ui_out_message (uiout
, 0, "No tracepoint matching '%s'.\n", args
);
12935 default_collect_info ();
12938 /* The 'enable trace' command enables tracepoints.
12939 Not supported by all targets. */
12941 enable_trace_command (char *args
, int from_tty
)
12943 enable_command (args
, from_tty
);
12946 /* The 'disable trace' command disables tracepoints.
12947 Not supported by all targets. */
12949 disable_trace_command (char *args
, int from_tty
)
12951 disable_command (args
, from_tty
);
12954 /* Remove a tracepoint (or all if no argument). */
12956 delete_trace_command (char *arg
, int from_tty
)
12958 struct breakpoint
*b
, *b_tmp
;
12964 int breaks_to_delete
= 0;
12966 /* Delete all breakpoints if no argument.
12967 Do not delete internal or call-dummy breakpoints, these
12968 have to be deleted with an explicit breakpoint number
12970 ALL_TRACEPOINTS (b
)
12971 if (is_tracepoint (b
) && user_breakpoint_p (b
))
12973 breaks_to_delete
= 1;
12977 /* Ask user only if there are some breakpoints to delete. */
12979 || (breaks_to_delete
&& query (_("Delete all tracepoints? "))))
12981 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
12982 if (is_tracepoint (b
) && user_breakpoint_p (b
))
12983 delete_breakpoint (b
);
12987 map_breakpoint_numbers (arg
, do_map_delete_breakpoint
, NULL
);
12990 /* Helper function for trace_pass_command. */
12993 trace_pass_set_count (struct tracepoint
*tp
, int count
, int from_tty
)
12995 tp
->pass_count
= count
;
12996 observer_notify_tracepoint_modified (tp
->base
.number
);
12998 printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
12999 tp
->base
.number
, count
);
13002 /* Set passcount for tracepoint.
13004 First command argument is passcount, second is tracepoint number.
13005 If tracepoint number omitted, apply to most recently defined.
13006 Also accepts special argument "all". */
13009 trace_pass_command (char *args
, int from_tty
)
13011 struct tracepoint
*t1
;
13012 unsigned int count
;
13014 if (args
== 0 || *args
== 0)
13015 error (_("passcount command requires an "
13016 "argument (count + optional TP num)"));
13018 count
= strtoul (args
, &args
, 10); /* Count comes first, then TP num. */
13020 while (*args
&& isspace ((int) *args
))
13023 if (*args
&& strncasecmp (args
, "all", 3) == 0)
13025 struct breakpoint
*b
;
13027 args
+= 3; /* Skip special argument "all". */
13029 error (_("Junk at end of arguments."));
13031 ALL_TRACEPOINTS (b
)
13033 t1
= (struct tracepoint
*) b
;
13034 trace_pass_set_count (t1
, count
, from_tty
);
13037 else if (*args
== '\0')
13039 t1
= get_tracepoint_by_number (&args
, NULL
, 1);
13041 trace_pass_set_count (t1
, count
, from_tty
);
13045 struct get_number_or_range_state state
;
13047 init_number_or_range (&state
, args
);
13048 while (!state
.finished
)
13050 t1
= get_tracepoint_by_number (&args
, &state
, 1);
13052 trace_pass_set_count (t1
, count
, from_tty
);
13057 struct tracepoint
*
13058 get_tracepoint (int num
)
13060 struct breakpoint
*t
;
13062 ALL_TRACEPOINTS (t
)
13063 if (t
->number
== num
)
13064 return (struct tracepoint
*) t
;
13069 /* Find the tracepoint with the given target-side number (which may be
13070 different from the tracepoint number after disconnecting and
13073 struct tracepoint
*
13074 get_tracepoint_by_number_on_target (int num
)
13076 struct breakpoint
*b
;
13078 ALL_TRACEPOINTS (b
)
13080 struct tracepoint
*t
= (struct tracepoint
*) b
;
13082 if (t
->number_on_target
== num
)
13089 /* Utility: parse a tracepoint number and look it up in the list.
13090 If STATE is not NULL, use, get_number_or_range_state and ignore ARG.
13091 If OPTIONAL_P is true, then if the argument is missing, the most
13092 recent tracepoint (tracepoint_count) is returned. */
13093 struct tracepoint
*
13094 get_tracepoint_by_number (char **arg
,
13095 struct get_number_or_range_state
*state
,
13098 extern int tracepoint_count
;
13099 struct breakpoint
*t
;
13101 char *instring
= arg
== NULL
? NULL
: *arg
;
13105 gdb_assert (!state
->finished
);
13106 tpnum
= get_number_or_range (state
);
13108 else if (arg
== NULL
|| *arg
== NULL
|| ! **arg
)
13111 tpnum
= tracepoint_count
;
13113 error_no_arg (_("tracepoint number"));
13116 tpnum
= get_number (arg
);
13120 if (instring
&& *instring
)
13121 printf_filtered (_("bad tracepoint number at or near '%s'\n"),
13124 printf_filtered (_("Tracepoint argument missing "
13125 "and no previous tracepoint\n"));
13129 ALL_TRACEPOINTS (t
)
13130 if (t
->number
== tpnum
)
13132 return (struct tracepoint
*) t
;
13135 printf_unfiltered ("No tracepoint number %d.\n", tpnum
);
13140 print_recreate_thread (struct breakpoint
*b
, struct ui_file
*fp
)
13142 if (b
->thread
!= -1)
13143 fprintf_unfiltered (fp
, " thread %d", b
->thread
);
13146 fprintf_unfiltered (fp
, " task %d", b
->task
);
13148 fprintf_unfiltered (fp
, "\n");
13151 /* Save information on user settable breakpoints (watchpoints, etc) to
13152 a new script file named FILENAME. If FILTER is non-NULL, call it
13153 on each breakpoint and only include the ones for which it returns
13157 save_breakpoints (char *filename
, int from_tty
,
13158 int (*filter
) (const struct breakpoint
*))
13160 struct breakpoint
*tp
;
13163 struct cleanup
*cleanup
;
13164 struct ui_file
*fp
;
13165 int extra_trace_bits
= 0;
13167 if (filename
== 0 || *filename
== 0)
13168 error (_("Argument required (file name in which to save)"));
13170 /* See if we have anything to save. */
13171 ALL_BREAKPOINTS (tp
)
13173 /* Skip internal and momentary breakpoints. */
13174 if (!user_breakpoint_p (tp
))
13177 /* If we have a filter, only save the breakpoints it accepts. */
13178 if (filter
&& !filter (tp
))
13183 if (is_tracepoint (tp
))
13185 extra_trace_bits
= 1;
13187 /* We can stop searching. */
13194 warning (_("Nothing to save."));
13198 pathname
= tilde_expand (filename
);
13199 cleanup
= make_cleanup (xfree
, pathname
);
13200 fp
= gdb_fopen (pathname
, "w");
13202 error (_("Unable to open file '%s' for saving (%s)"),
13203 filename
, safe_strerror (errno
));
13204 make_cleanup_ui_file_delete (fp
);
13206 if (extra_trace_bits
)
13207 save_trace_state_variables (fp
);
13209 ALL_BREAKPOINTS (tp
)
13211 /* Skip internal and momentary breakpoints. */
13212 if (!user_breakpoint_p (tp
))
13215 /* If we have a filter, only save the breakpoints it accepts. */
13216 if (filter
&& !filter (tp
))
13219 tp
->ops
->print_recreate (tp
, fp
);
13221 /* Note, we can't rely on tp->number for anything, as we can't
13222 assume the recreated breakpoint numbers will match. Use $bpnum
13225 if (tp
->cond_string
)
13226 fprintf_unfiltered (fp
, " condition $bpnum %s\n", tp
->cond_string
);
13228 if (tp
->ignore_count
)
13229 fprintf_unfiltered (fp
, " ignore $bpnum %d\n", tp
->ignore_count
);
13233 volatile struct gdb_exception ex
;
13235 fprintf_unfiltered (fp
, " commands\n");
13237 ui_out_redirect (current_uiout
, fp
);
13238 TRY_CATCH (ex
, RETURN_MASK_ALL
)
13240 print_command_lines (current_uiout
, tp
->commands
->commands
, 2);
13242 ui_out_redirect (current_uiout
, NULL
);
13245 throw_exception (ex
);
13247 fprintf_unfiltered (fp
, " end\n");
13250 if (tp
->enable_state
== bp_disabled
)
13251 fprintf_unfiltered (fp
, "disable\n");
13253 /* If this is a multi-location breakpoint, check if the locations
13254 should be individually disabled. Watchpoint locations are
13255 special, and not user visible. */
13256 if (!is_watchpoint (tp
) && tp
->loc
&& tp
->loc
->next
)
13258 struct bp_location
*loc
;
13261 for (loc
= tp
->loc
; loc
!= NULL
; loc
= loc
->next
, n
++)
13263 fprintf_unfiltered (fp
, "disable $bpnum.%d\n", n
);
13267 if (extra_trace_bits
&& *default_collect
)
13268 fprintf_unfiltered (fp
, "set default-collect %s\n", default_collect
);
13270 do_cleanups (cleanup
);
13272 printf_filtered (_("Saved to file '%s'.\n"), filename
);
13275 /* The `save breakpoints' command. */
13278 save_breakpoints_command (char *args
, int from_tty
)
13280 save_breakpoints (args
, from_tty
, NULL
);
13283 /* The `save tracepoints' command. */
13286 save_tracepoints_command (char *args
, int from_tty
)
13288 save_breakpoints (args
, from_tty
, is_tracepoint
);
13291 /* Create a vector of all tracepoints. */
13293 VEC(breakpoint_p
) *
13294 all_tracepoints (void)
13296 VEC(breakpoint_p
) *tp_vec
= 0;
13297 struct breakpoint
*tp
;
13299 ALL_TRACEPOINTS (tp
)
13301 VEC_safe_push (breakpoint_p
, tp_vec
, tp
);
13308 /* This help string is used for the break, hbreak, tbreak and thbreak
13309 commands. It is defined as a macro to prevent duplication.
13310 COMMAND should be a string constant containing the name of the
13312 #define BREAK_ARGS_HELP(command) \
13313 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
13314 LOCATION may be a line number, function name, or \"*\" and an address.\n\
13315 If a line number is specified, break at start of code for that line.\n\
13316 If a function is specified, break at start of code for that function.\n\
13317 If an address is specified, break at that exact address.\n\
13318 With no LOCATION, uses current execution address of the selected\n\
13319 stack frame. This is useful for breaking on return to a stack frame.\n\
13321 THREADNUM is the number from \"info threads\".\n\
13322 CONDITION is a boolean expression.\n\
13324 Multiple breakpoints at one place are permitted, and useful if their\n\
13325 conditions are different.\n\
13327 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
13329 /* List of subcommands for "catch". */
13330 static struct cmd_list_element
*catch_cmdlist
;
13332 /* List of subcommands for "tcatch". */
13333 static struct cmd_list_element
*tcatch_cmdlist
;
13336 add_catch_command (char *name
, char *docstring
,
13337 void (*sfunc
) (char *args
, int from_tty
,
13338 struct cmd_list_element
*command
),
13339 char **(*completer
) (struct cmd_list_element
*cmd
,
13340 char *text
, char *word
),
13341 void *user_data_catch
,
13342 void *user_data_tcatch
)
13344 struct cmd_list_element
*command
;
13346 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
13348 set_cmd_sfunc (command
, sfunc
);
13349 set_cmd_context (command
, user_data_catch
);
13350 set_cmd_completer (command
, completer
);
13352 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
13354 set_cmd_sfunc (command
, sfunc
);
13355 set_cmd_context (command
, user_data_tcatch
);
13356 set_cmd_completer (command
, completer
);
13360 clear_syscall_counts (struct inferior
*inf
)
13362 inf
->total_syscalls_count
= 0;
13363 inf
->any_syscall_count
= 0;
13364 VEC_free (int, inf
->syscalls_counts
);
13368 save_command (char *arg
, int from_tty
)
13370 printf_unfiltered (_("\"save\" must be followed by "
13371 "the name of a save subcommand.\n"));
13372 help_list (save_cmdlist
, "save ", -1, gdb_stdout
);
13375 struct breakpoint
*
13376 iterate_over_breakpoints (int (*callback
) (struct breakpoint
*, void *),
13379 struct breakpoint
*b
, *b_tmp
;
13381 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
13383 if ((*callback
) (b
, data
))
13390 /* Zero if any of the breakpoint's locations could be a location where
13391 functions have been inlined, nonzero otherwise. */
13394 is_non_inline_function (struct breakpoint
*b
)
13396 /* The shared library event breakpoint is set on the address of a
13397 non-inline function. */
13398 if (b
->type
== bp_shlib_event
)
13404 /* Nonzero if the specified PC cannot be a location where functions
13405 have been inlined. */
13408 pc_at_non_inline_function (struct address_space
*aspace
, CORE_ADDR pc
)
13410 struct breakpoint
*b
;
13411 struct bp_location
*bl
;
13413 ALL_BREAKPOINTS (b
)
13415 if (!is_non_inline_function (b
))
13418 for (bl
= b
->loc
; bl
!= NULL
; bl
= bl
->next
)
13420 if (!bl
->shlib_disabled
13421 && bpstat_check_location (bl
, aspace
, pc
))
13430 initialize_breakpoint_ops (void)
13432 static int initialized
= 0;
13434 struct breakpoint_ops
*ops
;
13440 /* The breakpoint_ops structure to be inherit by all kinds of
13441 breakpoints (real breakpoints, i.e., user "break" breakpoints,
13442 internal and momentary breakpoints, etc.). */
13443 ops
= &bkpt_base_breakpoint_ops
;
13444 *ops
= base_breakpoint_ops
;
13445 ops
->re_set
= bkpt_re_set
;
13446 ops
->insert_location
= bkpt_insert_location
;
13447 ops
->remove_location
= bkpt_remove_location
;
13448 ops
->breakpoint_hit
= bkpt_breakpoint_hit
;
13450 /* The breakpoint_ops structure to be used in regular breakpoints. */
13451 ops
= &bkpt_breakpoint_ops
;
13452 *ops
= bkpt_base_breakpoint_ops
;
13453 ops
->re_set
= bkpt_re_set
;
13454 ops
->resources_needed
= bkpt_resources_needed
;
13455 ops
->print_it
= bkpt_print_it
;
13456 ops
->print_mention
= bkpt_print_mention
;
13457 ops
->print_recreate
= bkpt_print_recreate
;
13459 /* Ranged breakpoints. */
13460 ops
= &ranged_breakpoint_ops
;
13461 *ops
= bkpt_breakpoint_ops
;
13462 ops
->breakpoint_hit
= breakpoint_hit_ranged_breakpoint
;
13463 ops
->resources_needed
= resources_needed_ranged_breakpoint
;
13464 ops
->print_it
= print_it_ranged_breakpoint
;
13465 ops
->print_one
= print_one_ranged_breakpoint
;
13466 ops
->print_one_detail
= print_one_detail_ranged_breakpoint
;
13467 ops
->print_mention
= print_mention_ranged_breakpoint
;
13468 ops
->print_recreate
= print_recreate_ranged_breakpoint
;
13470 /* Internal breakpoints. */
13471 ops
= &internal_breakpoint_ops
;
13472 *ops
= bkpt_base_breakpoint_ops
;
13473 ops
->re_set
= internal_bkpt_re_set
;
13474 ops
->check_status
= internal_bkpt_check_status
;
13475 ops
->print_it
= internal_bkpt_print_it
;
13476 ops
->print_mention
= internal_bkpt_print_mention
;
13478 /* Momentary breakpoints. */
13479 ops
= &momentary_breakpoint_ops
;
13480 *ops
= bkpt_base_breakpoint_ops
;
13481 ops
->re_set
= momentary_bkpt_re_set
;
13482 ops
->check_status
= momentary_bkpt_check_status
;
13483 ops
->print_it
= momentary_bkpt_print_it
;
13484 ops
->print_mention
= momentary_bkpt_print_mention
;
13486 /* GNU v3 exception catchpoints. */
13487 ops
= &gnu_v3_exception_catchpoint_ops
;
13488 *ops
= bkpt_breakpoint_ops
;
13489 ops
->print_it
= print_it_exception_catchpoint
;
13490 ops
->print_one
= print_one_exception_catchpoint
;
13491 ops
->print_mention
= print_mention_exception_catchpoint
;
13492 ops
->print_recreate
= print_recreate_exception_catchpoint
;
13495 ops
= &watchpoint_breakpoint_ops
;
13496 *ops
= base_breakpoint_ops
;
13497 ops
->dtor
= dtor_watchpoint
;
13498 ops
->re_set
= re_set_watchpoint
;
13499 ops
->insert_location
= insert_watchpoint
;
13500 ops
->remove_location
= remove_watchpoint
;
13501 ops
->breakpoint_hit
= breakpoint_hit_watchpoint
;
13502 ops
->check_status
= check_status_watchpoint
;
13503 ops
->resources_needed
= resources_needed_watchpoint
;
13504 ops
->works_in_software_mode
= works_in_software_mode_watchpoint
;
13505 ops
->print_it
= print_it_watchpoint
;
13506 ops
->print_mention
= print_mention_watchpoint
;
13507 ops
->print_recreate
= print_recreate_watchpoint
;
13509 /* Masked watchpoints. */
13510 ops
= &masked_watchpoint_breakpoint_ops
;
13511 *ops
= watchpoint_breakpoint_ops
;
13512 ops
->insert_location
= insert_masked_watchpoint
;
13513 ops
->remove_location
= remove_masked_watchpoint
;
13514 ops
->resources_needed
= resources_needed_masked_watchpoint
;
13515 ops
->works_in_software_mode
= works_in_software_mode_masked_watchpoint
;
13516 ops
->print_it
= print_it_masked_watchpoint
;
13517 ops
->print_one_detail
= print_one_detail_masked_watchpoint
;
13518 ops
->print_mention
= print_mention_masked_watchpoint
;
13519 ops
->print_recreate
= print_recreate_masked_watchpoint
;
13522 ops
= &tracepoint_breakpoint_ops
;
13523 *ops
= base_breakpoint_ops
;
13524 ops
->re_set
= tracepoint_re_set
;
13525 ops
->breakpoint_hit
= tracepoint_breakpoint_hit
;
13526 ops
->print_one_detail
= tracepoint_print_one_detail
;
13527 ops
->print_mention
= tracepoint_print_mention
;
13528 ops
->print_recreate
= tracepoint_print_recreate
;
13530 /* Fork catchpoints. */
13531 ops
= &catch_fork_breakpoint_ops
;
13532 *ops
= base_breakpoint_ops
;
13533 ops
->insert_location
= insert_catch_fork
;
13534 ops
->remove_location
= remove_catch_fork
;
13535 ops
->breakpoint_hit
= breakpoint_hit_catch_fork
;
13536 ops
->print_it
= print_it_catch_fork
;
13537 ops
->print_one
= print_one_catch_fork
;
13538 ops
->print_mention
= print_mention_catch_fork
;
13539 ops
->print_recreate
= print_recreate_catch_fork
;
13541 /* Vfork catchpoints. */
13542 ops
= &catch_vfork_breakpoint_ops
;
13543 *ops
= base_breakpoint_ops
;
13544 ops
->insert_location
= insert_catch_vfork
;
13545 ops
->remove_location
= remove_catch_vfork
;
13546 ops
->breakpoint_hit
= breakpoint_hit_catch_vfork
;
13547 ops
->print_it
= print_it_catch_vfork
;
13548 ops
->print_one
= print_one_catch_vfork
;
13549 ops
->print_mention
= print_mention_catch_vfork
;
13550 ops
->print_recreate
= print_recreate_catch_vfork
;
13552 /* Exec catchpoints. */
13553 ops
= &catch_exec_breakpoint_ops
;
13554 *ops
= base_breakpoint_ops
;
13555 ops
->dtor
= dtor_catch_exec
;
13556 ops
->insert_location
= insert_catch_exec
;
13557 ops
->remove_location
= remove_catch_exec
;
13558 ops
->breakpoint_hit
= breakpoint_hit_catch_exec
;
13559 ops
->print_it
= print_it_catch_exec
;
13560 ops
->print_one
= print_one_catch_exec
;
13561 ops
->print_mention
= print_mention_catch_exec
;
13562 ops
->print_recreate
= print_recreate_catch_exec
;
13564 /* Syscall catchpoints. */
13565 ops
= &catch_syscall_breakpoint_ops
;
13566 *ops
= base_breakpoint_ops
;
13567 ops
->dtor
= dtor_catch_syscall
;
13568 ops
->insert_location
= insert_catch_syscall
;
13569 ops
->remove_location
= remove_catch_syscall
;
13570 ops
->breakpoint_hit
= breakpoint_hit_catch_syscall
;
13571 ops
->print_it
= print_it_catch_syscall
;
13572 ops
->print_one
= print_one_catch_syscall
;
13573 ops
->print_mention
= print_mention_catch_syscall
;
13574 ops
->print_recreate
= print_recreate_catch_syscall
;
13578 _initialize_breakpoint (void)
13580 struct cmd_list_element
*c
;
13582 initialize_breakpoint_ops ();
13584 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
13585 observer_attach_inferior_exit (clear_syscall_counts
);
13586 observer_attach_memory_changed (invalidate_bp_value_on_memory_change
);
13588 breakpoint_objfile_key
= register_objfile_data ();
13590 breakpoint_chain
= 0;
13591 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
13592 before a breakpoint is set. */
13593 breakpoint_count
= 0;
13595 tracepoint_count
= 0;
13597 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
13598 Set ignore-count of breakpoint number N to COUNT.\n\
13599 Usage is `ignore N COUNT'."));
13601 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
13603 add_com ("commands", class_breakpoint
, commands_command
, _("\
13604 Set commands to be executed when a breakpoint is hit.\n\
13605 Give breakpoint number as argument after \"commands\".\n\
13606 With no argument, the targeted breakpoint is the last one set.\n\
13607 The commands themselves follow starting on the next line.\n\
13608 Type a line containing \"end\" to indicate the end of them.\n\
13609 Give \"silent\" as the first line to make the breakpoint silent;\n\
13610 then no output is printed when it is hit, except what the commands print."));
13612 add_com ("condition", class_breakpoint
, condition_command
, _("\
13613 Specify breakpoint number N to break only if COND is true.\n\
13614 Usage is `condition N COND', where N is an integer and COND is an\n\
13615 expression to be evaluated whenever breakpoint N is reached."));
13617 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
13618 Set a temporary breakpoint.\n\
13619 Like \"break\" except the breakpoint is only temporary,\n\
13620 so it will be deleted when hit. Equivalent to \"break\" followed\n\
13621 by using \"enable delete\" on the breakpoint number.\n\
13623 BREAK_ARGS_HELP ("tbreak")));
13624 set_cmd_completer (c
, location_completer
);
13626 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
13627 Set a hardware assisted breakpoint.\n\
13628 Like \"break\" except the breakpoint requires hardware support,\n\
13629 some target hardware may not have this support.\n\
13631 BREAK_ARGS_HELP ("hbreak")));
13632 set_cmd_completer (c
, location_completer
);
13634 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
13635 Set a temporary hardware assisted breakpoint.\n\
13636 Like \"hbreak\" except the breakpoint is only temporary,\n\
13637 so it will be deleted when hit.\n\
13639 BREAK_ARGS_HELP ("thbreak")));
13640 set_cmd_completer (c
, location_completer
);
13642 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
13643 Enable some breakpoints.\n\
13644 Give breakpoint numbers (separated by spaces) as arguments.\n\
13645 With no subcommand, breakpoints are enabled until you command otherwise.\n\
13646 This is used to cancel the effect of the \"disable\" command.\n\
13647 With a subcommand you can enable temporarily."),
13648 &enablelist
, "enable ", 1, &cmdlist
);
13650 add_com ("ab", class_breakpoint
, enable_command
, _("\
13651 Enable some breakpoints.\n\
13652 Give breakpoint numbers (separated by spaces) as arguments.\n\
13653 With no subcommand, breakpoints are enabled until you command otherwise.\n\
13654 This is used to cancel the effect of the \"disable\" command.\n\
13655 With a subcommand you can enable temporarily."));
13657 add_com_alias ("en", "enable", class_breakpoint
, 1);
13659 add_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
13660 Enable some breakpoints.\n\
13661 Give breakpoint numbers (separated by spaces) as arguments.\n\
13662 This is used to cancel the effect of the \"disable\" command.\n\
13663 May be abbreviated to simply \"enable\".\n"),
13664 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
13666 add_cmd ("once", no_class
, enable_once_command
, _("\
13667 Enable breakpoints for one hit. Give breakpoint numbers.\n\
13668 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
13671 add_cmd ("delete", no_class
, enable_delete_command
, _("\
13672 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
13673 If a breakpoint is hit while enabled in this fashion, it is deleted."),
13676 add_cmd ("delete", no_class
, enable_delete_command
, _("\
13677 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
13678 If a breakpoint is hit while enabled in this fashion, it is deleted."),
13681 add_cmd ("once", no_class
, enable_once_command
, _("\
13682 Enable breakpoints for one hit. Give breakpoint numbers.\n\
13683 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
13686 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
13687 Disable some breakpoints.\n\
13688 Arguments are breakpoint numbers with spaces in between.\n\
13689 To disable all breakpoints, give no argument.\n\
13690 A disabled breakpoint is not forgotten, but has no effect until re-enabled."),
13691 &disablelist
, "disable ", 1, &cmdlist
);
13692 add_com_alias ("dis", "disable", class_breakpoint
, 1);
13693 add_com_alias ("disa", "disable", class_breakpoint
, 1);
13695 add_com ("sb", class_breakpoint
, disable_command
, _("\
13696 Disable some breakpoints.\n\
13697 Arguments are breakpoint numbers with spaces in between.\n\
13698 To disable all breakpoints, give no argument.\n\
13699 A disabled breakpoint is not forgotten, but has no effect until re-enabled."));
13701 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
13702 Disable some breakpoints.\n\
13703 Arguments are breakpoint numbers with spaces in between.\n\
13704 To disable all breakpoints, give no argument.\n\
13705 A disabled breakpoint is not forgotten, but has no effect until re-enabled.\n\
13706 This command may be abbreviated \"disable\"."),
13709 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
13710 Delete some breakpoints or auto-display expressions.\n\
13711 Arguments are breakpoint numbers with spaces in between.\n\
13712 To delete all breakpoints, give no argument.\n\
13714 Also a prefix command for deletion of other GDB objects.\n\
13715 The \"unset\" command is also an alias for \"delete\"."),
13716 &deletelist
, "delete ", 1, &cmdlist
);
13717 add_com_alias ("d", "delete", class_breakpoint
, 1);
13718 add_com_alias ("del", "delete", class_breakpoint
, 1);
13720 add_com ("db", class_breakpoint
, delete_command
, _("\
13721 Delete some breakpoints.\n\
13722 Arguments are breakpoint numbers with spaces in between.\n\
13723 To delete all breakpoints, give no argument.\n"));
13725 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
13726 Delete some breakpoints or auto-display expressions.\n\
13727 Arguments are breakpoint numbers with spaces in between.\n\
13728 To delete all breakpoints, give no argument.\n\
13729 This command may be abbreviated \"delete\"."),
13732 add_com ("clear", class_breakpoint
, clear_command
, _("\
13733 Clear breakpoint at specified line or function.\n\
13734 Argument may be line number, function name, or \"*\" and an address.\n\
13735 If line number is specified, all breakpoints in that line are cleared.\n\
13736 If function is specified, breakpoints at beginning of function are cleared.\n\
13737 If an address is specified, breakpoints at that address are cleared.\n\
13739 With no argument, clears all breakpoints in the line that the selected frame\n\
13740 is executing in.\n\
13742 See also the \"delete\" command which clears breakpoints by number."));
13743 add_com_alias ("cl", "clear", class_breakpoint
, 1);
13745 c
= add_com ("break", class_breakpoint
, break_command
, _("\
13746 Set breakpoint at specified line or function.\n"
13747 BREAK_ARGS_HELP ("break")));
13748 set_cmd_completer (c
, location_completer
);
13750 add_com_alias ("b", "break", class_run
, 1);
13751 add_com_alias ("br", "break", class_run
, 1);
13752 add_com_alias ("bre", "break", class_run
, 1);
13753 add_com_alias ("brea", "break", class_run
, 1);
13756 add_com_alias ("ba", "break", class_breakpoint
, 1);
13760 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
13761 Break in function/address or break at a line in the current file."),
13762 &stoplist
, "stop ", 1, &cmdlist
);
13763 add_cmd ("in", class_breakpoint
, stopin_command
,
13764 _("Break in function or address."), &stoplist
);
13765 add_cmd ("at", class_breakpoint
, stopat_command
,
13766 _("Break at a line in the current file."), &stoplist
);
13767 add_com ("status", class_info
, breakpoints_info
, _("\
13768 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
13769 The \"Type\" column indicates one of:\n\
13770 \tbreakpoint - normal breakpoint\n\
13771 \twatchpoint - watchpoint\n\
13772 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
13773 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
13774 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
13775 address and file/line number respectively.\n\
13777 Convenience variable \"$_\" and default examine address for \"x\"\n\
13778 are set to the address of the last breakpoint listed unless the command\n\
13779 is prefixed with \"server \".\n\n\
13780 Convenience variable \"$bpnum\" contains the number of the last\n\
13781 breakpoint set."));
13784 add_info ("breakpoints", breakpoints_info
, _("\
13785 Status of specified breakpoints (all user-settable breakpoints if no argument).\n\
13786 The \"Type\" column indicates one of:\n\
13787 \tbreakpoint - normal breakpoint\n\
13788 \twatchpoint - watchpoint\n\
13789 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
13790 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
13791 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
13792 address and file/line number respectively.\n\
13794 Convenience variable \"$_\" and default examine address for \"x\"\n\
13795 are set to the address of the last breakpoint listed unless the command\n\
13796 is prefixed with \"server \".\n\n\
13797 Convenience variable \"$bpnum\" contains the number of the last\n\
13798 breakpoint set."));
13800 add_info_alias ("b", "breakpoints", 1);
13803 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
13804 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
13805 The \"Type\" column indicates one of:\n\
13806 \tbreakpoint - normal breakpoint\n\
13807 \twatchpoint - watchpoint\n\
13808 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
13809 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
13810 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
13811 address and file/line number respectively.\n\
13813 Convenience variable \"$_\" and default examine address for \"x\"\n\
13814 are set to the address of the last breakpoint listed unless the command\n\
13815 is prefixed with \"server \".\n\n\
13816 Convenience variable \"$bpnum\" contains the number of the last\n\
13817 breakpoint set."));
13819 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
13820 Status of all breakpoints, or breakpoint number NUMBER.\n\
13821 The \"Type\" column indicates one of:\n\
13822 \tbreakpoint - normal breakpoint\n\
13823 \twatchpoint - watchpoint\n\
13824 \tlongjmp - internal breakpoint used to step through longjmp()\n\
13825 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
13826 \tuntil - internal breakpoint used by the \"until\" command\n\
13827 \tfinish - internal breakpoint used by the \"finish\" command\n\
13828 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
13829 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
13830 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
13831 address and file/line number respectively.\n\
13833 Convenience variable \"$_\" and default examine address for \"x\"\n\
13834 are set to the address of the last breakpoint listed unless the command\n\
13835 is prefixed with \"server \".\n\n\
13836 Convenience variable \"$bpnum\" contains the number of the last\n\
13838 &maintenanceinfolist
);
13840 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
13841 Set catchpoints to catch events."),
13842 &catch_cmdlist
, "catch ",
13843 0/*allow-unknown*/, &cmdlist
);
13845 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
13846 Set temporary catchpoints to catch events."),
13847 &tcatch_cmdlist
, "tcatch ",
13848 0/*allow-unknown*/, &cmdlist
);
13850 /* Add catch and tcatch sub-commands. */
13851 add_catch_command ("catch", _("\
13852 Catch an exception, when caught.\n\
13853 With an argument, catch only exceptions with the given name."),
13854 catch_catch_command
,
13858 add_catch_command ("throw", _("\
13859 Catch an exception, when thrown.\n\
13860 With an argument, catch only exceptions with the given name."),
13861 catch_throw_command
,
13865 add_catch_command ("fork", _("Catch calls to fork."),
13866 catch_fork_command_1
,
13868 (void *) (uintptr_t) catch_fork_permanent
,
13869 (void *) (uintptr_t) catch_fork_temporary
);
13870 add_catch_command ("vfork", _("Catch calls to vfork."),
13871 catch_fork_command_1
,
13873 (void *) (uintptr_t) catch_vfork_permanent
,
13874 (void *) (uintptr_t) catch_vfork_temporary
);
13875 add_catch_command ("exec", _("Catch calls to exec."),
13876 catch_exec_command_1
,
13880 add_catch_command ("syscall", _("\
13881 Catch system calls by their names and/or numbers.\n\
13882 Arguments say which system calls to catch. If no arguments\n\
13883 are given, every system call will be caught.\n\
13884 Arguments, if given, should be one or more system call names\n\
13885 (if your system supports that), or system call numbers."),
13886 catch_syscall_command_1
,
13887 catch_syscall_completer
,
13891 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
13892 Set a watchpoint for an expression.\n\
13893 Usage: watch [-l|-location] EXPRESSION\n\
13894 A watchpoint stops execution of your program whenever the value of\n\
13895 an expression changes.\n\
13896 If -l or -location is given, this evaluates EXPRESSION and watches\n\
13897 the memory to which it refers."));
13898 set_cmd_completer (c
, expression_completer
);
13900 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
13901 Set a read watchpoint for an expression.\n\
13902 Usage: rwatch [-l|-location] EXPRESSION\n\
13903 A watchpoint stops execution of your program whenever the value of\n\
13904 an expression is read.\n\
13905 If -l or -location is given, this evaluates EXPRESSION and watches\n\
13906 the memory to which it refers."));
13907 set_cmd_completer (c
, expression_completer
);
13909 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
13910 Set a watchpoint for an expression.\n\
13911 Usage: awatch [-l|-location] EXPRESSION\n\
13912 A watchpoint stops execution of your program whenever the value of\n\
13913 an expression is either read or written.\n\
13914 If -l or -location is given, this evaluates EXPRESSION and watches\n\
13915 the memory to which it refers."));
13916 set_cmd_completer (c
, expression_completer
);
13918 add_info ("watchpoints", watchpoints_info
, _("\
13919 Status of specified watchpoints (all watchpoints if no argument)."));
13921 /* XXX: cagney/2005-02-23: This should be a boolean, and should
13922 respond to changes - contrary to the description. */
13923 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
13924 &can_use_hw_watchpoints
, _("\
13925 Set debugger's willingness to use watchpoint hardware."), _("\
13926 Show debugger's willingness to use watchpoint hardware."), _("\
13927 If zero, gdb will not use hardware for new watchpoints, even if\n\
13928 such is available. (However, any hardware watchpoints that were\n\
13929 created before setting this to nonzero, will continue to use watchpoint\n\
13932 show_can_use_hw_watchpoints
,
13933 &setlist
, &showlist
);
13935 can_use_hw_watchpoints
= 1;
13937 /* Tracepoint manipulation commands. */
13939 c
= add_com ("trace", class_breakpoint
, trace_command
, _("\
13940 Set a tracepoint at specified line or function.\n\
13942 BREAK_ARGS_HELP ("trace") "\n\
13943 Do \"help tracepoints\" for info on other tracepoint commands."));
13944 set_cmd_completer (c
, location_completer
);
13946 add_com_alias ("tp", "trace", class_alias
, 0);
13947 add_com_alias ("tr", "trace", class_alias
, 1);
13948 add_com_alias ("tra", "trace", class_alias
, 1);
13949 add_com_alias ("trac", "trace", class_alias
, 1);
13951 c
= add_com ("ftrace", class_breakpoint
, ftrace_command
, _("\
13952 Set a fast tracepoint at specified line or function.\n\
13954 BREAK_ARGS_HELP ("ftrace") "\n\
13955 Do \"help tracepoints\" for info on other tracepoint commands."));
13956 set_cmd_completer (c
, location_completer
);
13958 c
= add_com ("strace", class_breakpoint
, strace_command
, _("\
13959 Set a static tracepoint at specified line, function or marker.\n\
13961 strace [LOCATION] [if CONDITION]\n\
13962 LOCATION may be a line number, function name, \"*\" and an address,\n\
13963 or -m MARKER_ID.\n\
13964 If a line number is specified, probe the marker at start of code\n\
13965 for that line. If a function is specified, probe the marker at start\n\
13966 of code for that function. If an address is specified, probe the marker\n\
13967 at that exact address. If a marker id is specified, probe the marker\n\
13968 with that name. With no LOCATION, uses current execution address of\n\
13969 the selected stack frame.\n\
13970 Static tracepoints accept an extra collect action -- ``collect $_sdata''.\n\
13971 This collects arbitrary user data passed in the probe point call to the\n\
13972 tracing library. You can inspect it when analyzing the trace buffer,\n\
13973 by printing the $_sdata variable like any other convenience variable.\n\
13975 CONDITION is a boolean expression.\n\
13977 Multiple tracepoints at one place are permitted, and useful if their\n\
13978 conditions are different.\n\
13980 Do \"help breakpoints\" for info on other commands dealing with breakpoints.\n\
13981 Do \"help tracepoints\" for info on other tracepoint commands."));
13982 set_cmd_completer (c
, location_completer
);
13984 add_info ("tracepoints", tracepoints_info
, _("\
13985 Status of specified tracepoints (all tracepoints if no argument).\n\
13986 Convenience variable \"$tpnum\" contains the number of the\n\
13987 last tracepoint set."));
13989 add_info_alias ("tp", "tracepoints", 1);
13991 add_cmd ("tracepoints", class_trace
, delete_trace_command
, _("\
13992 Delete specified tracepoints.\n\
13993 Arguments are tracepoint numbers, separated by spaces.\n\
13994 No argument means delete all tracepoints."),
13997 c
= add_cmd ("tracepoints", class_trace
, disable_trace_command
, _("\
13998 Disable specified tracepoints.\n\
13999 Arguments are tracepoint numbers, separated by spaces.\n\
14000 No argument means disable all tracepoints."),
14002 deprecate_cmd (c
, "disable");
14004 c
= add_cmd ("tracepoints", class_trace
, enable_trace_command
, _("\
14005 Enable specified tracepoints.\n\
14006 Arguments are tracepoint numbers, separated by spaces.\n\
14007 No argument means enable all tracepoints."),
14009 deprecate_cmd (c
, "enable");
14011 add_com ("passcount", class_trace
, trace_pass_command
, _("\
14012 Set the passcount for a tracepoint.\n\
14013 The trace will end when the tracepoint has been passed 'count' times.\n\
14014 Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
14015 if TPNUM is omitted, passcount refers to the last tracepoint defined."));
14017 add_prefix_cmd ("save", class_breakpoint
, save_command
,
14018 _("Save breakpoint definitions as a script."),
14019 &save_cmdlist
, "save ",
14020 0/*allow-unknown*/, &cmdlist
);
14022 c
= add_cmd ("breakpoints", class_breakpoint
, save_breakpoints_command
, _("\
14023 Save current breakpoint definitions as a script.\n\
14024 This includes all types of breakpoints (breakpoints, watchpoints,\n\
14025 catchpoints, tracepoints). Use the 'source' command in another debug\n\
14026 session to restore them."),
14028 set_cmd_completer (c
, filename_completer
);
14030 c
= add_cmd ("tracepoints", class_trace
, save_tracepoints_command
, _("\
14031 Save current tracepoint definitions as a script.\n\
14032 Use the 'source' command in another debug session to restore them."),
14034 set_cmd_completer (c
, filename_completer
);
14036 c
= add_com_alias ("save-tracepoints", "save tracepoints", class_trace
, 0);
14037 deprecate_cmd (c
, "save tracepoints");
14039 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
14040 Breakpoint specific settings\n\
14041 Configure various breakpoint-specific variables such as\n\
14042 pending breakpoint behavior"),
14043 &breakpoint_set_cmdlist
, "set breakpoint ",
14044 0/*allow-unknown*/, &setlist
);
14045 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
14046 Breakpoint specific settings\n\
14047 Configure various breakpoint-specific variables such as\n\
14048 pending breakpoint behavior"),
14049 &breakpoint_show_cmdlist
, "show breakpoint ",
14050 0/*allow-unknown*/, &showlist
);
14052 add_setshow_auto_boolean_cmd ("pending", no_class
,
14053 &pending_break_support
, _("\
14054 Set debugger's behavior regarding pending breakpoints."), _("\
14055 Show debugger's behavior regarding pending breakpoints."), _("\
14056 If on, an unrecognized breakpoint location will cause gdb to create a\n\
14057 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
14058 an error. If auto, an unrecognized breakpoint location results in a\n\
14059 user-query to see if a pending breakpoint should be created."),
14061 show_pending_break_support
,
14062 &breakpoint_set_cmdlist
,
14063 &breakpoint_show_cmdlist
);
14065 pending_break_support
= AUTO_BOOLEAN_AUTO
;
14067 add_setshow_boolean_cmd ("auto-hw", no_class
,
14068 &automatic_hardware_breakpoints
, _("\
14069 Set automatic usage of hardware breakpoints."), _("\
14070 Show automatic usage of hardware breakpoints."), _("\
14071 If set, the debugger will automatically use hardware breakpoints for\n\
14072 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
14073 a warning will be emitted for such breakpoints."),
14075 show_automatic_hardware_breakpoints
,
14076 &breakpoint_set_cmdlist
,
14077 &breakpoint_show_cmdlist
);
14079 add_setshow_enum_cmd ("always-inserted", class_support
,
14080 always_inserted_enums
, &always_inserted_mode
, _("\
14081 Set mode for inserting breakpoints."), _("\
14082 Show mode for inserting breakpoints."), _("\
14083 When this mode is off, breakpoints are inserted in inferior when it is\n\
14084 resumed, and removed when execution stops. When this mode is on,\n\
14085 breakpoints are inserted immediately and removed only when the user\n\
14086 deletes the breakpoint. When this mode is auto (which is the default),\n\
14087 the behaviour depends on the non-stop setting (see help set non-stop).\n\
14088 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
14089 behaves as if always-inserted mode is on; if gdb is controlling the\n\
14090 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
14092 &show_always_inserted_mode
,
14093 &breakpoint_set_cmdlist
,
14094 &breakpoint_show_cmdlist
);
14096 add_com ("break-range", class_breakpoint
, break_range_command
, _("\
14097 Set a breakpoint for an address range.\n\
14098 break-range START-LOCATION, END-LOCATION\n\
14099 where START-LOCATION and END-LOCATION can be one of the following:\n\
14100 LINENUM, for that line in the current file,\n\
14101 FILE:LINENUM, for that line in that file,\n\
14102 +OFFSET, for that number of lines after the current line\n\
14103 or the start of the range\n\
14104 FUNCTION, for the first line in that function,\n\
14105 FILE:FUNCTION, to distinguish among like-named static functions.\n\
14106 *ADDRESS, for the instruction at that address.\n\
14108 The breakpoint will stop execution of the inferior whenever it executes\n\
14109 an instruction at any address within the [START-LOCATION, END-LOCATION]\n\
14110 range (including START-LOCATION and END-LOCATION)."));
14112 automatic_hardware_breakpoints
= 1;
14114 observer_attach_about_to_proceed (breakpoint_about_to_proceed
);