1 /* Everything about breakpoints, for GDB.
3 Copyright (C) 1986-2019 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "arch-utils.h"
26 #include "breakpoint.h"
27 #include "tracepoint.h"
29 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb-demangle.h"
40 #include "filenames.h"
46 #include "completer.h"
48 #include "cli/cli-script.h"
52 #include "observable.h"
58 #include "parser-defs.h"
59 #include "gdb_regex.h"
61 #include "cli/cli-utils.h"
62 #include "continuations.h"
66 #include "dummy-frame.h"
68 #include "common/format.h"
69 #include "thread-fsm.h"
70 #include "tid-parse.h"
71 #include "cli/cli-style.h"
73 /* readline include files */
74 #include "readline/readline.h"
75 #include "readline/history.h"
77 /* readline defines this. */
80 #include "mi/mi-common.h"
81 #include "extension.h"
83 #include "progspace-and-thread.h"
84 #include "common/array-view.h"
85 #include "common/gdb_optional.h"
87 /* Enums for exception-handling support. */
88 enum exception_event_kind
95 /* Prototypes for local functions. */
97 static void map_breakpoint_numbers (const char *,
98 gdb::function_view
<void (breakpoint
*)>);
100 static void breakpoint_re_set_default (struct breakpoint
*);
103 create_sals_from_location_default (const struct event_location
*location
,
104 struct linespec_result
*canonical
,
105 enum bptype type_wanted
);
107 static void create_breakpoints_sal_default (struct gdbarch
*,
108 struct linespec_result
*,
109 gdb::unique_xmalloc_ptr
<char>,
110 gdb::unique_xmalloc_ptr
<char>,
112 enum bpdisp
, int, int,
114 const struct breakpoint_ops
*,
115 int, int, int, unsigned);
117 static std::vector
<symtab_and_line
> decode_location_default
118 (struct breakpoint
*b
, const struct event_location
*location
,
119 struct program_space
*search_pspace
);
121 static int can_use_hardware_watchpoint
122 (const std::vector
<value_ref_ptr
> &vals
);
124 static void mention (struct breakpoint
*);
126 static struct breakpoint
*set_raw_breakpoint_without_location (struct gdbarch
*,
128 const struct breakpoint_ops
*);
129 static struct bp_location
*add_location_to_breakpoint (struct breakpoint
*,
130 const struct symtab_and_line
*);
132 /* This function is used in gdbtk sources and thus can not be made
134 struct breakpoint
*set_raw_breakpoint (struct gdbarch
*gdbarch
,
135 struct symtab_and_line
,
137 const struct breakpoint_ops
*);
139 static struct breakpoint
*
140 momentary_breakpoint_from_master (struct breakpoint
*orig
,
142 const struct breakpoint_ops
*ops
,
145 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
147 static CORE_ADDR
adjust_breakpoint_address (struct gdbarch
*gdbarch
,
151 static void describe_other_breakpoints (struct gdbarch
*,
152 struct program_space
*, CORE_ADDR
,
153 struct obj_section
*, int);
155 static int watchpoint_locations_match (struct bp_location
*loc1
,
156 struct bp_location
*loc2
);
158 static int breakpoint_location_address_match (struct bp_location
*bl
,
159 const struct address_space
*aspace
,
162 static int breakpoint_location_address_range_overlap (struct bp_location
*,
163 const address_space
*,
166 static int remove_breakpoint (struct bp_location
*);
167 static int remove_breakpoint_1 (struct bp_location
*, enum remove_bp_reason
);
169 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
171 static int hw_breakpoint_used_count (void);
173 static int hw_watchpoint_use_count (struct breakpoint
*);
175 static int hw_watchpoint_used_count_others (struct breakpoint
*except
,
177 int *other_type_used
);
179 static void enable_breakpoint_disp (struct breakpoint
*, enum bpdisp
,
182 static void free_bp_location (struct bp_location
*loc
);
183 static void incref_bp_location (struct bp_location
*loc
);
184 static void decref_bp_location (struct bp_location
**loc
);
186 static struct bp_location
*allocate_bp_location (struct breakpoint
*bpt
);
188 /* update_global_location_list's modes of operation wrt to whether to
189 insert locations now. */
190 enum ugll_insert_mode
192 /* Don't insert any breakpoint locations into the inferior, only
193 remove already-inserted locations that no longer should be
194 inserted. Functions that delete a breakpoint or breakpoints
195 should specify this mode, so that deleting a breakpoint doesn't
196 have the side effect of inserting the locations of other
197 breakpoints that are marked not-inserted, but should_be_inserted
198 returns true on them.
200 This behavior is useful is situations close to tear-down -- e.g.,
201 after an exec, while the target still has execution, but
202 breakpoint shadows of the previous executable image should *NOT*
203 be restored to the new image; or before detaching, where the
204 target still has execution and wants to delete breakpoints from
205 GDB's lists, and all breakpoints had already been removed from
209 /* May insert breakpoints iff breakpoints_should_be_inserted_now
210 claims breakpoints should be inserted now. */
213 /* Insert locations now, irrespective of
214 breakpoints_should_be_inserted_now. E.g., say all threads are
215 stopped right now, and the user did "continue". We need to
216 insert breakpoints _before_ resuming the target, but
217 UGLL_MAY_INSERT wouldn't insert them, because
218 breakpoints_should_be_inserted_now returns false at that point,
219 as no thread is running yet. */
223 static void update_global_location_list (enum ugll_insert_mode
);
225 static void update_global_location_list_nothrow (enum ugll_insert_mode
);
227 static int is_hardware_watchpoint (const struct breakpoint
*bpt
);
229 static void insert_breakpoint_locations (void);
231 static void trace_pass_command (const char *, int);
233 static void set_tracepoint_count (int num
);
235 static int is_masked_watchpoint (const struct breakpoint
*b
);
237 static struct bp_location
**get_first_locp_gte_addr (CORE_ADDR address
);
239 /* Return 1 if B refers to a static tracepoint set by marker ("-m"), zero
242 static int strace_marker_p (struct breakpoint
*b
);
244 /* The breakpoint_ops structure to be inherited by all breakpoint_ops
245 that are implemented on top of software or hardware breakpoints
246 (user breakpoints, internal and momentary breakpoints, etc.). */
247 static struct breakpoint_ops bkpt_base_breakpoint_ops
;
249 /* Internal breakpoints class type. */
250 static struct breakpoint_ops internal_breakpoint_ops
;
252 /* Momentary breakpoints class type. */
253 static struct breakpoint_ops momentary_breakpoint_ops
;
255 /* The breakpoint_ops structure to be used in regular user created
257 struct breakpoint_ops bkpt_breakpoint_ops
;
259 /* Breakpoints set on probes. */
260 static struct breakpoint_ops bkpt_probe_breakpoint_ops
;
262 /* Dynamic printf class type. */
263 struct breakpoint_ops dprintf_breakpoint_ops
;
265 /* The style in which to perform a dynamic printf. This is a user
266 option because different output options have different tradeoffs;
267 if GDB does the printing, there is better error handling if there
268 is a problem with any of the arguments, but using an inferior
269 function lets you have special-purpose printers and sending of
270 output to the same place as compiled-in print functions. */
272 static const char dprintf_style_gdb
[] = "gdb";
273 static const char dprintf_style_call
[] = "call";
274 static const char dprintf_style_agent
[] = "agent";
275 static const char *const dprintf_style_enums
[] = {
281 static const char *dprintf_style
= dprintf_style_gdb
;
283 /* The function to use for dynamic printf if the preferred style is to
284 call into the inferior. The value is simply a string that is
285 copied into the command, so it can be anything that GDB can
286 evaluate to a callable address, not necessarily a function name. */
288 static char *dprintf_function
;
290 /* The channel to use for dynamic printf if the preferred style is to
291 call into the inferior; if a nonempty string, it will be passed to
292 the call as the first argument, with the format string as the
293 second. As with the dprintf function, this can be anything that
294 GDB knows how to evaluate, so in addition to common choices like
295 "stderr", this could be an app-specific expression like
296 "mystreams[curlogger]". */
298 static char *dprintf_channel
;
300 /* True if dprintf commands should continue to operate even if GDB
302 static int disconnected_dprintf
= 1;
304 struct command_line
*
305 breakpoint_commands (struct breakpoint
*b
)
307 return b
->commands
? b
->commands
.get () : NULL
;
310 /* Flag indicating that a command has proceeded the inferior past the
311 current breakpoint. */
313 static int breakpoint_proceeded
;
316 bpdisp_text (enum bpdisp disp
)
318 /* NOTE: the following values are a part of MI protocol and
319 represent values of 'disp' field returned when inferior stops at
321 static const char * const bpdisps
[] = {"del", "dstp", "dis", "keep"};
323 return bpdisps
[(int) disp
];
326 /* Prototypes for exported functions. */
327 /* If FALSE, gdb will not use hardware support for watchpoints, even
328 if such is available. */
329 static int can_use_hw_watchpoints
;
332 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
333 struct cmd_list_element
*c
,
336 fprintf_filtered (file
,
337 _("Debugger's willingness to use "
338 "watchpoint hardware is %s.\n"),
342 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
343 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
344 for unrecognized breakpoint locations.
345 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
346 static enum auto_boolean pending_break_support
;
348 show_pending_break_support (struct ui_file
*file
, int from_tty
,
349 struct cmd_list_element
*c
,
352 fprintf_filtered (file
,
353 _("Debugger's behavior regarding "
354 "pending breakpoints is %s.\n"),
358 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
359 set with "break" but falling in read-only memory.
360 If 0, gdb will warn about such breakpoints, but won't automatically
361 use hardware breakpoints. */
362 static int automatic_hardware_breakpoints
;
364 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
365 struct cmd_list_element
*c
,
368 fprintf_filtered (file
,
369 _("Automatic usage of hardware breakpoints is %s.\n"),
373 /* If on, GDB keeps breakpoints inserted even if the inferior is
374 stopped, and immediately inserts any new breakpoints as soon as
375 they're created. If off (default), GDB keeps breakpoints off of
376 the target as long as possible. That is, it delays inserting
377 breakpoints until the next resume, and removes them again when the
378 target fully stops. This is a bit safer in case GDB crashes while
379 processing user input. */
380 static int always_inserted_mode
= 0;
383 show_always_inserted_mode (struct ui_file
*file
, int from_tty
,
384 struct cmd_list_element
*c
, const char *value
)
386 fprintf_filtered (file
, _("Always inserted breakpoint mode is %s.\n"),
390 /* See breakpoint.h. */
393 breakpoints_should_be_inserted_now (void)
395 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
397 /* If breakpoints are global, they should be inserted even if no
398 thread under gdb's control is running, or even if there are
399 no threads under GDB's control yet. */
402 else if (target_has_execution
)
404 if (always_inserted_mode
)
406 /* The user wants breakpoints inserted even if all threads
411 if (threads_are_executing ())
414 /* Don't remove breakpoints yet if, even though all threads are
415 stopped, we still have events to process. */
416 for (thread_info
*tp
: all_non_exited_threads ())
418 && tp
->suspend
.waitstatus_pending_p
)
424 static const char condition_evaluation_both
[] = "host or target";
426 /* Modes for breakpoint condition evaluation. */
427 static const char condition_evaluation_auto
[] = "auto";
428 static const char condition_evaluation_host
[] = "host";
429 static const char condition_evaluation_target
[] = "target";
430 static const char *const condition_evaluation_enums
[] = {
431 condition_evaluation_auto
,
432 condition_evaluation_host
,
433 condition_evaluation_target
,
437 /* Global that holds the current mode for breakpoint condition evaluation. */
438 static const char *condition_evaluation_mode_1
= condition_evaluation_auto
;
440 /* Global that we use to display information to the user (gets its value from
441 condition_evaluation_mode_1. */
442 static const char *condition_evaluation_mode
= condition_evaluation_auto
;
444 /* Translate a condition evaluation mode MODE into either "host"
445 or "target". This is used mostly to translate from "auto" to the
446 real setting that is being used. It returns the translated
450 translate_condition_evaluation_mode (const char *mode
)
452 if (mode
== condition_evaluation_auto
)
454 if (target_supports_evaluation_of_breakpoint_conditions ())
455 return condition_evaluation_target
;
457 return condition_evaluation_host
;
463 /* Discovers what condition_evaluation_auto translates to. */
466 breakpoint_condition_evaluation_mode (void)
468 return translate_condition_evaluation_mode (condition_evaluation_mode
);
471 /* Return true if GDB should evaluate breakpoint conditions or false
475 gdb_evaluates_breakpoint_condition_p (void)
477 const char *mode
= breakpoint_condition_evaluation_mode ();
479 return (mode
== condition_evaluation_host
);
482 /* Are we executing breakpoint commands? */
483 static int executing_breakpoint_commands
;
485 /* Are overlay event breakpoints enabled? */
486 static int overlay_events_enabled
;
488 /* See description in breakpoint.h. */
489 int target_exact_watchpoints
= 0;
491 /* Walk the following statement or block through all breakpoints.
492 ALL_BREAKPOINTS_SAFE does so even if the statement deletes the
493 current breakpoint. */
495 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
497 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
498 for (B = breakpoint_chain; \
499 B ? (TMP=B->next, 1): 0; \
502 /* Similar iterator for the low-level breakpoints. SAFE variant is
503 not provided so update_global_location_list must not be called
504 while executing the block of ALL_BP_LOCATIONS. */
506 #define ALL_BP_LOCATIONS(B,BP_TMP) \
507 for (BP_TMP = bp_locations; \
508 BP_TMP < bp_locations + bp_locations_count && (B = *BP_TMP);\
511 /* Iterates through locations with address ADDRESS for the currently selected
512 program space. BP_LOCP_TMP points to each object. BP_LOCP_START points
513 to where the loop should start from.
514 If BP_LOCP_START is a NULL pointer, the macro automatically seeks the
515 appropriate location to start with. */
517 #define ALL_BP_LOCATIONS_AT_ADDR(BP_LOCP_TMP, BP_LOCP_START, ADDRESS) \
518 for (BP_LOCP_START = BP_LOCP_START == NULL ? get_first_locp_gte_addr (ADDRESS) : BP_LOCP_START, \
519 BP_LOCP_TMP = BP_LOCP_START; \
521 && (BP_LOCP_TMP < bp_locations + bp_locations_count \
522 && (*BP_LOCP_TMP)->address == ADDRESS); \
525 /* Iterator for tracepoints only. */
527 #define ALL_TRACEPOINTS(B) \
528 for (B = breakpoint_chain; B; B = B->next) \
529 if (is_tracepoint (B))
531 /* Chains of all breakpoints defined. */
533 struct breakpoint
*breakpoint_chain
;
535 /* Array is sorted by bp_locations_compare - primarily by the ADDRESS. */
537 static struct bp_location
**bp_locations
;
539 /* Number of elements of BP_LOCATIONS. */
541 static unsigned bp_locations_count
;
543 /* Maximum alignment offset between bp_target_info.PLACED_ADDRESS and
544 ADDRESS for the current elements of BP_LOCATIONS which get a valid
545 result from bp_location_has_shadow. You can use it for roughly
546 limiting the subrange of BP_LOCATIONS to scan for shadow bytes for
547 an address you need to read. */
549 static CORE_ADDR bp_locations_placed_address_before_address_max
;
551 /* Maximum offset plus alignment between bp_target_info.PLACED_ADDRESS
552 + bp_target_info.SHADOW_LEN and ADDRESS for the current elements of
553 BP_LOCATIONS which get a valid result from bp_location_has_shadow.
554 You can use it for roughly limiting the subrange of BP_LOCATIONS to
555 scan for shadow bytes for an address you need to read. */
557 static CORE_ADDR bp_locations_shadow_len_after_address_max
;
559 /* The locations that no longer correspond to any breakpoint, unlinked
560 from the bp_locations array, but for which a hit may still be
561 reported by a target. */
562 static std::vector
<bp_location
*> moribund_locations
;
564 /* Number of last breakpoint made. */
566 static int breakpoint_count
;
568 /* The value of `breakpoint_count' before the last command that
569 created breakpoints. If the last (break-like) command created more
570 than one breakpoint, then the difference between BREAKPOINT_COUNT
571 and PREV_BREAKPOINT_COUNT is more than one. */
572 static int prev_breakpoint_count
;
574 /* Number of last tracepoint made. */
576 static int tracepoint_count
;
578 static struct cmd_list_element
*breakpoint_set_cmdlist
;
579 static struct cmd_list_element
*breakpoint_show_cmdlist
;
580 struct cmd_list_element
*save_cmdlist
;
582 /* See declaration at breakpoint.h. */
585 breakpoint_find_if (int (*func
) (struct breakpoint
*b
, void *d
),
588 struct breakpoint
*b
= NULL
;
592 if (func (b
, user_data
) != 0)
599 /* Return whether a breakpoint is an active enabled breakpoint. */
601 breakpoint_enabled (struct breakpoint
*b
)
603 return (b
->enable_state
== bp_enabled
);
606 /* Set breakpoint count to NUM. */
609 set_breakpoint_count (int num
)
611 prev_breakpoint_count
= breakpoint_count
;
612 breakpoint_count
= num
;
613 set_internalvar_integer (lookup_internalvar ("bpnum"), num
);
616 /* Used by `start_rbreak_breakpoints' below, to record the current
617 breakpoint count before "rbreak" creates any breakpoint. */
618 static int rbreak_start_breakpoint_count
;
620 /* Called at the start an "rbreak" command to record the first
623 scoped_rbreak_breakpoints::scoped_rbreak_breakpoints ()
625 rbreak_start_breakpoint_count
= breakpoint_count
;
628 /* Called at the end of an "rbreak" command to record the last
631 scoped_rbreak_breakpoints::~scoped_rbreak_breakpoints ()
633 prev_breakpoint_count
= rbreak_start_breakpoint_count
;
636 /* Used in run_command to zero the hit count when a new run starts. */
639 clear_breakpoint_hit_counts (void)
641 struct breakpoint
*b
;
648 /* Return the breakpoint with the specified number, or NULL
649 if the number does not refer to an existing breakpoint. */
652 get_breakpoint (int num
)
654 struct breakpoint
*b
;
657 if (b
->number
== num
)
665 /* Mark locations as "conditions have changed" in case the target supports
666 evaluating conditions on its side. */
669 mark_breakpoint_modified (struct breakpoint
*b
)
671 struct bp_location
*loc
;
673 /* This is only meaningful if the target is
674 evaluating conditions and if the user has
675 opted for condition evaluation on the target's
677 if (gdb_evaluates_breakpoint_condition_p ()
678 || !target_supports_evaluation_of_breakpoint_conditions ())
681 if (!is_breakpoint (b
))
684 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
685 loc
->condition_changed
= condition_modified
;
688 /* Mark location as "conditions have changed" in case the target supports
689 evaluating conditions on its side. */
692 mark_breakpoint_location_modified (struct bp_location
*loc
)
694 /* This is only meaningful if the target is
695 evaluating conditions and if the user has
696 opted for condition evaluation on the target's
698 if (gdb_evaluates_breakpoint_condition_p ()
699 || !target_supports_evaluation_of_breakpoint_conditions ())
703 if (!is_breakpoint (loc
->owner
))
706 loc
->condition_changed
= condition_modified
;
709 /* Sets the condition-evaluation mode using the static global
710 condition_evaluation_mode. */
713 set_condition_evaluation_mode (const char *args
, int from_tty
,
714 struct cmd_list_element
*c
)
716 const char *old_mode
, *new_mode
;
718 if ((condition_evaluation_mode_1
== condition_evaluation_target
)
719 && !target_supports_evaluation_of_breakpoint_conditions ())
721 condition_evaluation_mode_1
= condition_evaluation_mode
;
722 warning (_("Target does not support breakpoint condition evaluation.\n"
723 "Using host evaluation mode instead."));
727 new_mode
= translate_condition_evaluation_mode (condition_evaluation_mode_1
);
728 old_mode
= translate_condition_evaluation_mode (condition_evaluation_mode
);
730 /* Flip the switch. Flip it even if OLD_MODE == NEW_MODE as one of the
731 settings was "auto". */
732 condition_evaluation_mode
= condition_evaluation_mode_1
;
734 /* Only update the mode if the user picked a different one. */
735 if (new_mode
!= old_mode
)
737 struct bp_location
*loc
, **loc_tmp
;
738 /* If the user switched to a different evaluation mode, we
739 need to synch the changes with the target as follows:
741 "host" -> "target": Send all (valid) conditions to the target.
742 "target" -> "host": Remove all the conditions from the target.
745 if (new_mode
== condition_evaluation_target
)
747 /* Mark everything modified and synch conditions with the
749 ALL_BP_LOCATIONS (loc
, loc_tmp
)
750 mark_breakpoint_location_modified (loc
);
754 /* Manually mark non-duplicate locations to synch conditions
755 with the target. We do this to remove all the conditions the
756 target knows about. */
757 ALL_BP_LOCATIONS (loc
, loc_tmp
)
758 if (is_breakpoint (loc
->owner
) && loc
->inserted
)
759 loc
->needs_update
= 1;
763 update_global_location_list (UGLL_MAY_INSERT
);
769 /* Shows the current mode of breakpoint condition evaluation. Explicitly shows
770 what "auto" is translating to. */
773 show_condition_evaluation_mode (struct ui_file
*file
, int from_tty
,
774 struct cmd_list_element
*c
, const char *value
)
776 if (condition_evaluation_mode
== condition_evaluation_auto
)
777 fprintf_filtered (file
,
778 _("Breakpoint condition evaluation "
779 "mode is %s (currently %s).\n"),
781 breakpoint_condition_evaluation_mode ());
783 fprintf_filtered (file
, _("Breakpoint condition evaluation mode is %s.\n"),
787 /* A comparison function for bp_location AP and BP that is used by
788 bsearch. This comparison function only cares about addresses, unlike
789 the more general bp_locations_compare function. */
792 bp_locations_compare_addrs (const void *ap
, const void *bp
)
794 const struct bp_location
*a
= *(const struct bp_location
**) ap
;
795 const struct bp_location
*b
= *(const struct bp_location
**) bp
;
797 if (a
->address
== b
->address
)
800 return ((a
->address
> b
->address
) - (a
->address
< b
->address
));
803 /* Helper function to skip all bp_locations with addresses
804 less than ADDRESS. It returns the first bp_location that
805 is greater than or equal to ADDRESS. If none is found, just
808 static struct bp_location
**
809 get_first_locp_gte_addr (CORE_ADDR address
)
811 struct bp_location dummy_loc
;
812 struct bp_location
*dummy_locp
= &dummy_loc
;
813 struct bp_location
**locp_found
= NULL
;
815 /* Initialize the dummy location's address field. */
816 dummy_loc
.address
= address
;
818 /* Find a close match to the first location at ADDRESS. */
819 locp_found
= ((struct bp_location
**)
820 bsearch (&dummy_locp
, bp_locations
, bp_locations_count
,
821 sizeof (struct bp_location
**),
822 bp_locations_compare_addrs
));
824 /* Nothing was found, nothing left to do. */
825 if (locp_found
== NULL
)
828 /* We may have found a location that is at ADDRESS but is not the first in the
829 location's list. Go backwards (if possible) and locate the first one. */
830 while ((locp_found
- 1) >= bp_locations
831 && (*(locp_found
- 1))->address
== address
)
838 set_breakpoint_condition (struct breakpoint
*b
, const char *exp
,
841 xfree (b
->cond_string
);
842 b
->cond_string
= NULL
;
844 if (is_watchpoint (b
))
846 struct watchpoint
*w
= (struct watchpoint
*) b
;
848 w
->cond_exp
.reset ();
852 struct bp_location
*loc
;
854 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
858 /* No need to free the condition agent expression
859 bytecode (if we have one). We will handle this
860 when we go through update_global_location_list. */
867 printf_filtered (_("Breakpoint %d now unconditional.\n"), b
->number
);
871 const char *arg
= exp
;
873 /* I don't know if it matters whether this is the string the user
874 typed in or the decompiled expression. */
875 b
->cond_string
= xstrdup (arg
);
876 b
->condition_not_parsed
= 0;
878 if (is_watchpoint (b
))
880 struct watchpoint
*w
= (struct watchpoint
*) b
;
882 innermost_block
.reset ();
884 w
->cond_exp
= parse_exp_1 (&arg
, 0, 0, 0);
886 error (_("Junk at end of expression"));
887 w
->cond_exp_valid_block
= innermost_block
.block ();
891 struct bp_location
*loc
;
893 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
897 parse_exp_1 (&arg
, loc
->address
,
898 block_for_pc (loc
->address
), 0);
900 error (_("Junk at end of expression"));
904 mark_breakpoint_modified (b
);
906 gdb::observers::breakpoint_modified
.notify (b
);
909 /* Completion for the "condition" command. */
912 condition_completer (struct cmd_list_element
*cmd
,
913 completion_tracker
&tracker
,
914 const char *text
, const char *word
)
918 text
= skip_spaces (text
);
919 space
= skip_to_space (text
);
923 struct breakpoint
*b
;
927 /* We don't support completion of history indices. */
928 if (!isdigit (text
[1]))
929 complete_internalvar (tracker
, &text
[1]);
933 /* We're completing the breakpoint number. */
940 xsnprintf (number
, sizeof (number
), "%d", b
->number
);
942 if (strncmp (number
, text
, len
) == 0)
944 gdb::unique_xmalloc_ptr
<char> copy (xstrdup (number
));
945 tracker
.add_completion (std::move (copy
));
952 /* We're completing the expression part. */
953 text
= skip_spaces (space
);
954 expression_completer (cmd
, tracker
, text
, word
);
957 /* condition N EXP -- set break condition of breakpoint N to EXP. */
960 condition_command (const char *arg
, int from_tty
)
962 struct breakpoint
*b
;
967 error_no_arg (_("breakpoint number"));
970 bnum
= get_number (&p
);
972 error (_("Bad breakpoint argument: '%s'"), arg
);
975 if (b
->number
== bnum
)
977 /* Check if this breakpoint has a "stop" method implemented in an
978 extension language. This method and conditions entered into GDB
979 from the CLI are mutually exclusive. */
980 const struct extension_language_defn
*extlang
981 = get_breakpoint_cond_ext_lang (b
, EXT_LANG_NONE
);
985 error (_("Only one stop condition allowed. There is currently"
986 " a %s stop condition defined for this breakpoint."),
987 ext_lang_capitalized_name (extlang
));
989 set_breakpoint_condition (b
, p
, from_tty
);
991 if (is_breakpoint (b
))
992 update_global_location_list (UGLL_MAY_INSERT
);
997 error (_("No breakpoint number %d."), bnum
);
1000 /* Check that COMMAND do not contain commands that are suitable
1001 only for tracepoints and not suitable for ordinary breakpoints.
1002 Throw if any such commands is found. */
1005 check_no_tracepoint_commands (struct command_line
*commands
)
1007 struct command_line
*c
;
1009 for (c
= commands
; c
; c
= c
->next
)
1011 if (c
->control_type
== while_stepping_control
)
1012 error (_("The 'while-stepping' command can "
1013 "only be used for tracepoints"));
1015 check_no_tracepoint_commands (c
->body_list_0
.get ());
1016 check_no_tracepoint_commands (c
->body_list_1
.get ());
1018 /* Not that command parsing removes leading whitespace and comment
1019 lines and also empty lines. So, we only need to check for
1020 command directly. */
1021 if (strstr (c
->line
, "collect ") == c
->line
)
1022 error (_("The 'collect' command can only be used for tracepoints"));
1024 if (strstr (c
->line
, "teval ") == c
->line
)
1025 error (_("The 'teval' command can only be used for tracepoints"));
1029 struct longjmp_breakpoint
: public breakpoint
1031 ~longjmp_breakpoint () override
;
1034 /* Encapsulate tests for different types of tracepoints. */
1037 is_tracepoint_type (bptype type
)
1039 return (type
== bp_tracepoint
1040 || type
== bp_fast_tracepoint
1041 || type
== bp_static_tracepoint
);
1045 is_longjmp_type (bptype type
)
1047 return type
== bp_longjmp
|| type
== bp_exception
;
1051 is_tracepoint (const struct breakpoint
*b
)
1053 return is_tracepoint_type (b
->type
);
1056 /* Factory function to create an appropriate instance of breakpoint given
1059 static std::unique_ptr
<breakpoint
>
1060 new_breakpoint_from_type (bptype type
)
1064 if (is_tracepoint_type (type
))
1065 b
= new tracepoint ();
1066 else if (is_longjmp_type (type
))
1067 b
= new longjmp_breakpoint ();
1069 b
= new breakpoint ();
1071 return std::unique_ptr
<breakpoint
> (b
);
1074 /* A helper function that validates that COMMANDS are valid for a
1075 breakpoint. This function will throw an exception if a problem is
1079 validate_commands_for_breakpoint (struct breakpoint
*b
,
1080 struct command_line
*commands
)
1082 if (is_tracepoint (b
))
1084 struct tracepoint
*t
= (struct tracepoint
*) b
;
1085 struct command_line
*c
;
1086 struct command_line
*while_stepping
= 0;
1088 /* Reset the while-stepping step count. The previous commands
1089 might have included a while-stepping action, while the new
1093 /* We need to verify that each top-level element of commands is
1094 valid for tracepoints, that there's at most one
1095 while-stepping element, and that the while-stepping's body
1096 has valid tracing commands excluding nested while-stepping.
1097 We also need to validate the tracepoint action line in the
1098 context of the tracepoint --- validate_actionline actually
1099 has side effects, like setting the tracepoint's
1100 while-stepping STEP_COUNT, in addition to checking if the
1101 collect/teval actions parse and make sense in the
1102 tracepoint's context. */
1103 for (c
= commands
; c
; c
= c
->next
)
1105 if (c
->control_type
== while_stepping_control
)
1107 if (b
->type
== bp_fast_tracepoint
)
1108 error (_("The 'while-stepping' command "
1109 "cannot be used for fast tracepoint"));
1110 else if (b
->type
== bp_static_tracepoint
)
1111 error (_("The 'while-stepping' command "
1112 "cannot be used for static tracepoint"));
1115 error (_("The 'while-stepping' command "
1116 "can be used only once"));
1121 validate_actionline (c
->line
, b
);
1125 struct command_line
*c2
;
1127 gdb_assert (while_stepping
->body_list_1
== nullptr);
1128 c2
= while_stepping
->body_list_0
.get ();
1129 for (; c2
; c2
= c2
->next
)
1131 if (c2
->control_type
== while_stepping_control
)
1132 error (_("The 'while-stepping' command cannot be nested"));
1138 check_no_tracepoint_commands (commands
);
1142 /* Return a vector of all the static tracepoints set at ADDR. The
1143 caller is responsible for releasing the vector. */
1145 std::vector
<breakpoint
*>
1146 static_tracepoints_here (CORE_ADDR addr
)
1148 struct breakpoint
*b
;
1149 std::vector
<breakpoint
*> found
;
1150 struct bp_location
*loc
;
1153 if (b
->type
== bp_static_tracepoint
)
1155 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
1156 if (loc
->address
== addr
)
1157 found
.push_back (b
);
1163 /* Set the command list of B to COMMANDS. If breakpoint is tracepoint,
1164 validate that only allowed commands are included. */
1167 breakpoint_set_commands (struct breakpoint
*b
,
1168 counted_command_line
&&commands
)
1170 validate_commands_for_breakpoint (b
, commands
.get ());
1172 b
->commands
= std::move (commands
);
1173 gdb::observers::breakpoint_modified
.notify (b
);
1176 /* Set the internal `silent' flag on the breakpoint. Note that this
1177 is not the same as the "silent" that may appear in the breakpoint's
1181 breakpoint_set_silent (struct breakpoint
*b
, int silent
)
1183 int old_silent
= b
->silent
;
1186 if (old_silent
!= silent
)
1187 gdb::observers::breakpoint_modified
.notify (b
);
1190 /* Set the thread for this breakpoint. If THREAD is -1, make the
1191 breakpoint work for any thread. */
1194 breakpoint_set_thread (struct breakpoint
*b
, int thread
)
1196 int old_thread
= b
->thread
;
1199 if (old_thread
!= thread
)
1200 gdb::observers::breakpoint_modified
.notify (b
);
1203 /* Set the task for this breakpoint. If TASK is 0, make the
1204 breakpoint work for any task. */
1207 breakpoint_set_task (struct breakpoint
*b
, int task
)
1209 int old_task
= b
->task
;
1212 if (old_task
!= task
)
1213 gdb::observers::breakpoint_modified
.notify (b
);
1217 commands_command_1 (const char *arg
, int from_tty
,
1218 struct command_line
*control
)
1220 counted_command_line cmd
;
1221 /* cmd_read will be true once we have read cmd. Note that cmd might still be
1222 NULL after the call to read_command_lines if the user provides an empty
1223 list of command by just typing "end". */
1224 bool cmd_read
= false;
1226 std::string new_arg
;
1228 if (arg
== NULL
|| !*arg
)
1230 if (breakpoint_count
- prev_breakpoint_count
> 1)
1231 new_arg
= string_printf ("%d-%d", prev_breakpoint_count
+ 1,
1233 else if (breakpoint_count
> 0)
1234 new_arg
= string_printf ("%d", breakpoint_count
);
1235 arg
= new_arg
.c_str ();
1238 map_breakpoint_numbers
1239 (arg
, [&] (breakpoint
*b
)
1243 gdb_assert (cmd
== NULL
);
1244 if (control
!= NULL
)
1245 cmd
= control
->body_list_0
;
1249 = string_printf (_("Type commands for breakpoint(s) "
1250 "%s, one per line."),
1253 auto do_validate
= [=] (const char *line
)
1255 validate_actionline (line
, b
);
1257 gdb::function_view
<void (const char *)> validator
;
1258 if (is_tracepoint (b
))
1259 validator
= do_validate
;
1261 cmd
= read_command_lines (str
.c_str (), from_tty
, 1, validator
);
1266 /* If a breakpoint was on the list more than once, we don't need to
1268 if (b
->commands
!= cmd
)
1270 validate_commands_for_breakpoint (b
, cmd
.get ());
1272 gdb::observers::breakpoint_modified
.notify (b
);
1278 commands_command (const char *arg
, int from_tty
)
1280 commands_command_1 (arg
, from_tty
, NULL
);
1283 /* Like commands_command, but instead of reading the commands from
1284 input stream, takes them from an already parsed command structure.
1286 This is used by cli-script.c to DTRT with breakpoint commands
1287 that are part of if and while bodies. */
1288 enum command_control_type
1289 commands_from_control_command (const char *arg
, struct command_line
*cmd
)
1291 commands_command_1 (arg
, 0, cmd
);
1292 return simple_control
;
1295 /* Return non-zero if BL->TARGET_INFO contains valid information. */
1298 bp_location_has_shadow (struct bp_location
*bl
)
1300 if (bl
->loc_type
!= bp_loc_software_breakpoint
)
1304 if (bl
->target_info
.shadow_len
== 0)
1305 /* BL isn't valid, or doesn't shadow memory. */
1310 /* Update BUF, which is LEN bytes read from the target address
1311 MEMADDR, by replacing a memory breakpoint with its shadowed
1314 If READBUF is not NULL, this buffer must not overlap with the of
1315 the breakpoint location's shadow_contents buffer. Otherwise, a
1316 failed assertion internal error will be raised. */
1319 one_breakpoint_xfer_memory (gdb_byte
*readbuf
, gdb_byte
*writebuf
,
1320 const gdb_byte
*writebuf_org
,
1321 ULONGEST memaddr
, LONGEST len
,
1322 struct bp_target_info
*target_info
,
1323 struct gdbarch
*gdbarch
)
1325 /* Now do full processing of the found relevant range of elements. */
1326 CORE_ADDR bp_addr
= 0;
1330 if (!breakpoint_address_match (target_info
->placed_address_space
, 0,
1331 current_program_space
->aspace
, 0))
1333 /* The breakpoint is inserted in a different address space. */
1337 /* Addresses and length of the part of the breakpoint that
1339 bp_addr
= target_info
->placed_address
;
1340 bp_size
= target_info
->shadow_len
;
1342 if (bp_addr
+ bp_size
<= memaddr
)
1344 /* The breakpoint is entirely before the chunk of memory we are
1349 if (bp_addr
>= memaddr
+ len
)
1351 /* The breakpoint is entirely after the chunk of memory we are
1356 /* Offset within shadow_contents. */
1357 if (bp_addr
< memaddr
)
1359 /* Only copy the second part of the breakpoint. */
1360 bp_size
-= memaddr
- bp_addr
;
1361 bptoffset
= memaddr
- bp_addr
;
1365 if (bp_addr
+ bp_size
> memaddr
+ len
)
1367 /* Only copy the first part of the breakpoint. */
1368 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
1371 if (readbuf
!= NULL
)
1373 /* Verify that the readbuf buffer does not overlap with the
1374 shadow_contents buffer. */
1375 gdb_assert (target_info
->shadow_contents
>= readbuf
+ len
1376 || readbuf
>= (target_info
->shadow_contents
1377 + target_info
->shadow_len
));
1379 /* Update the read buffer with this inserted breakpoint's
1381 memcpy (readbuf
+ bp_addr
- memaddr
,
1382 target_info
->shadow_contents
+ bptoffset
, bp_size
);
1386 const unsigned char *bp
;
1387 CORE_ADDR addr
= target_info
->reqstd_address
;
1390 /* Update the shadow with what we want to write to memory. */
1391 memcpy (target_info
->shadow_contents
+ bptoffset
,
1392 writebuf_org
+ bp_addr
- memaddr
, bp_size
);
1394 /* Determine appropriate breakpoint contents and size for this
1396 bp
= gdbarch_breakpoint_from_pc (gdbarch
, &addr
, &placed_size
);
1398 /* Update the final write buffer with this inserted
1399 breakpoint's INSN. */
1400 memcpy (writebuf
+ bp_addr
- memaddr
, bp
+ bptoffset
, bp_size
);
1404 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
1405 by replacing any memory breakpoints with their shadowed contents.
1407 If READBUF is not NULL, this buffer must not overlap with any of
1408 the breakpoint location's shadow_contents buffers. Otherwise,
1409 a failed assertion internal error will be raised.
1411 The range of shadowed area by each bp_location is:
1412 bl->address - bp_locations_placed_address_before_address_max
1413 up to bl->address + bp_locations_shadow_len_after_address_max
1414 The range we were requested to resolve shadows for is:
1415 memaddr ... memaddr + len
1416 Thus the safe cutoff boundaries for performance optimization are
1417 memaddr + len <= (bl->address
1418 - bp_locations_placed_address_before_address_max)
1420 bl->address + bp_locations_shadow_len_after_address_max <= memaddr */
1423 breakpoint_xfer_memory (gdb_byte
*readbuf
, gdb_byte
*writebuf
,
1424 const gdb_byte
*writebuf_org
,
1425 ULONGEST memaddr
, LONGEST len
)
1427 /* Left boundary, right boundary and median element of our binary
1429 unsigned bc_l
, bc_r
, bc
;
1431 /* Find BC_L which is a leftmost element which may affect BUF
1432 content. It is safe to report lower value but a failure to
1433 report higher one. */
1436 bc_r
= bp_locations_count
;
1437 while (bc_l
+ 1 < bc_r
)
1439 struct bp_location
*bl
;
1441 bc
= (bc_l
+ bc_r
) / 2;
1442 bl
= bp_locations
[bc
];
1444 /* Check first BL->ADDRESS will not overflow due to the added
1445 constant. Then advance the left boundary only if we are sure
1446 the BC element can in no way affect the BUF content (MEMADDR
1447 to MEMADDR + LEN range).
1449 Use the BP_LOCATIONS_SHADOW_LEN_AFTER_ADDRESS_MAX safety
1450 offset so that we cannot miss a breakpoint with its shadow
1451 range tail still reaching MEMADDR. */
1453 if ((bl
->address
+ bp_locations_shadow_len_after_address_max
1455 && (bl
->address
+ bp_locations_shadow_len_after_address_max
1462 /* Due to the binary search above, we need to make sure we pick the
1463 first location that's at BC_L's address. E.g., if there are
1464 multiple locations at the same address, BC_L may end up pointing
1465 at a duplicate location, and miss the "master"/"inserted"
1466 location. Say, given locations L1, L2 and L3 at addresses A and
1469 L1@A, L2@A, L3@B, ...
1471 BC_L could end up pointing at location L2, while the "master"
1472 location could be L1. Since the `loc->inserted' flag is only set
1473 on "master" locations, we'd forget to restore the shadow of L1
1476 && bp_locations
[bc_l
]->address
== bp_locations
[bc_l
- 1]->address
)
1479 /* Now do full processing of the found relevant range of elements. */
1481 for (bc
= bc_l
; bc
< bp_locations_count
; bc
++)
1483 struct bp_location
*bl
= bp_locations
[bc
];
1485 /* bp_location array has BL->OWNER always non-NULL. */
1486 if (bl
->owner
->type
== bp_none
)
1487 warning (_("reading through apparently deleted breakpoint #%d?"),
1490 /* Performance optimization: any further element can no longer affect BUF
1493 if (bl
->address
>= bp_locations_placed_address_before_address_max
1494 && memaddr
+ len
<= (bl
->address
1495 - bp_locations_placed_address_before_address_max
))
1498 if (!bp_location_has_shadow (bl
))
1501 one_breakpoint_xfer_memory (readbuf
, writebuf
, writebuf_org
,
1502 memaddr
, len
, &bl
->target_info
, bl
->gdbarch
);
1508 /* Return true if BPT is either a software breakpoint or a hardware
1512 is_breakpoint (const struct breakpoint
*bpt
)
1514 return (bpt
->type
== bp_breakpoint
1515 || bpt
->type
== bp_hardware_breakpoint
1516 || bpt
->type
== bp_dprintf
);
1519 /* Return true if BPT is of any hardware watchpoint kind. */
1522 is_hardware_watchpoint (const struct breakpoint
*bpt
)
1524 return (bpt
->type
== bp_hardware_watchpoint
1525 || bpt
->type
== bp_read_watchpoint
1526 || bpt
->type
== bp_access_watchpoint
);
1529 /* Return true if BPT is of any watchpoint kind, hardware or
1533 is_watchpoint (const struct breakpoint
*bpt
)
1535 return (is_hardware_watchpoint (bpt
)
1536 || bpt
->type
== bp_watchpoint
);
1539 /* Returns true if the current thread and its running state are safe
1540 to evaluate or update watchpoint B. Watchpoints on local
1541 expressions need to be evaluated in the context of the thread that
1542 was current when the watchpoint was created, and, that thread needs
1543 to be stopped to be able to select the correct frame context.
1544 Watchpoints on global expressions can be evaluated on any thread,
1545 and in any state. It is presently left to the target allowing
1546 memory accesses when threads are running. */
1549 watchpoint_in_thread_scope (struct watchpoint
*b
)
1551 return (b
->pspace
== current_program_space
1552 && (b
->watchpoint_thread
== null_ptid
1553 || (inferior_ptid
== b
->watchpoint_thread
1554 && !inferior_thread ()->executing
)));
1557 /* Set watchpoint B to disp_del_at_next_stop, even including its possible
1558 associated bp_watchpoint_scope breakpoint. */
1561 watchpoint_del_at_next_stop (struct watchpoint
*w
)
1563 if (w
->related_breakpoint
!= w
)
1565 gdb_assert (w
->related_breakpoint
->type
== bp_watchpoint_scope
);
1566 gdb_assert (w
->related_breakpoint
->related_breakpoint
== w
);
1567 w
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1568 w
->related_breakpoint
->related_breakpoint
= w
->related_breakpoint
;
1569 w
->related_breakpoint
= w
;
1571 w
->disposition
= disp_del_at_next_stop
;
1574 /* Extract a bitfield value from value VAL using the bit parameters contained in
1577 static struct value
*
1578 extract_bitfield_from_watchpoint_value (struct watchpoint
*w
, struct value
*val
)
1580 struct value
*bit_val
;
1585 bit_val
= allocate_value (value_type (val
));
1587 unpack_value_bitfield (bit_val
,
1590 value_contents_for_printing (val
),
1597 /* Allocate a dummy location and add it to B, which must be a software
1598 watchpoint. This is required because even if a software watchpoint
1599 is not watching any memory, bpstat_stop_status requires a location
1600 to be able to report stops. */
1603 software_watchpoint_add_no_memory_location (struct breakpoint
*b
,
1604 struct program_space
*pspace
)
1606 gdb_assert (b
->type
== bp_watchpoint
&& b
->loc
== NULL
);
1608 b
->loc
= allocate_bp_location (b
);
1609 b
->loc
->pspace
= pspace
;
1610 b
->loc
->address
= -1;
1611 b
->loc
->length
= -1;
1614 /* Returns true if B is a software watchpoint that is not watching any
1615 memory (e.g., "watch $pc"). */
1618 is_no_memory_software_watchpoint (struct breakpoint
*b
)
1620 return (b
->type
== bp_watchpoint
1622 && b
->loc
->next
== NULL
1623 && b
->loc
->address
== -1
1624 && b
->loc
->length
== -1);
1627 /* Assuming that B is a watchpoint:
1628 - Reparse watchpoint expression, if REPARSE is non-zero
1629 - Evaluate expression and store the result in B->val
1630 - Evaluate the condition if there is one, and store the result
1632 - Update the list of values that must be watched in B->loc.
1634 If the watchpoint disposition is disp_del_at_next_stop, then do
1635 nothing. If this is local watchpoint that is out of scope, delete
1638 Even with `set breakpoint always-inserted on' the watchpoints are
1639 removed + inserted on each stop here. Normal breakpoints must
1640 never be removed because they might be missed by a running thread
1641 when debugging in non-stop mode. On the other hand, hardware
1642 watchpoints (is_hardware_watchpoint; processed here) are specific
1643 to each LWP since they are stored in each LWP's hardware debug
1644 registers. Therefore, such LWP must be stopped first in order to
1645 be able to modify its hardware watchpoints.
1647 Hardware watchpoints must be reset exactly once after being
1648 presented to the user. It cannot be done sooner, because it would
1649 reset the data used to present the watchpoint hit to the user. And
1650 it must not be done later because it could display the same single
1651 watchpoint hit during multiple GDB stops. Note that the latter is
1652 relevant only to the hardware watchpoint types bp_read_watchpoint
1653 and bp_access_watchpoint. False hit by bp_hardware_watchpoint is
1654 not user-visible - its hit is suppressed if the memory content has
1657 The following constraints influence the location where we can reset
1658 hardware watchpoints:
1660 * target_stopped_by_watchpoint and target_stopped_data_address are
1661 called several times when GDB stops.
1664 * Multiple hardware watchpoints can be hit at the same time,
1665 causing GDB to stop. GDB only presents one hardware watchpoint
1666 hit at a time as the reason for stopping, and all the other hits
1667 are presented later, one after the other, each time the user
1668 requests the execution to be resumed. Execution is not resumed
1669 for the threads still having pending hit event stored in
1670 LWP_INFO->STATUS. While the watchpoint is already removed from
1671 the inferior on the first stop the thread hit event is kept being
1672 reported from its cached value by linux_nat_stopped_data_address
1673 until the real thread resume happens after the watchpoint gets
1674 presented and thus its LWP_INFO->STATUS gets reset.
1676 Therefore the hardware watchpoint hit can get safely reset on the
1677 watchpoint removal from inferior. */
1680 update_watchpoint (struct watchpoint
*b
, int reparse
)
1682 int within_current_scope
;
1683 struct frame_id saved_frame_id
;
1686 /* If this is a local watchpoint, we only want to check if the
1687 watchpoint frame is in scope if the current thread is the thread
1688 that was used to create the watchpoint. */
1689 if (!watchpoint_in_thread_scope (b
))
1692 if (b
->disposition
== disp_del_at_next_stop
)
1697 /* Determine if the watchpoint is within scope. */
1698 if (b
->exp_valid_block
== NULL
)
1699 within_current_scope
= 1;
1702 struct frame_info
*fi
= get_current_frame ();
1703 struct gdbarch
*frame_arch
= get_frame_arch (fi
);
1704 CORE_ADDR frame_pc
= get_frame_pc (fi
);
1706 /* If we're at a point where the stack has been destroyed
1707 (e.g. in a function epilogue), unwinding may not work
1708 properly. Do not attempt to recreate locations at this
1709 point. See similar comments in watchpoint_check. */
1710 if (gdbarch_stack_frame_destroyed_p (frame_arch
, frame_pc
))
1713 /* Save the current frame's ID so we can restore it after
1714 evaluating the watchpoint expression on its own frame. */
1715 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
1716 took a frame parameter, so that we didn't have to change the
1719 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
1721 fi
= frame_find_by_id (b
->watchpoint_frame
);
1722 within_current_scope
= (fi
!= NULL
);
1723 if (within_current_scope
)
1727 /* We don't free locations. They are stored in the bp_location array
1728 and update_global_location_list will eventually delete them and
1729 remove breakpoints if needed. */
1732 if (within_current_scope
&& reparse
)
1737 s
= b
->exp_string_reparse
? b
->exp_string_reparse
: b
->exp_string
;
1738 b
->exp
= parse_exp_1 (&s
, 0, b
->exp_valid_block
, 0);
1739 /* If the meaning of expression itself changed, the old value is
1740 no longer relevant. We don't want to report a watchpoint hit
1741 to the user when the old value and the new value may actually
1742 be completely different objects. */
1746 /* Note that unlike with breakpoints, the watchpoint's condition
1747 expression is stored in the breakpoint object, not in the
1748 locations (re)created below. */
1749 if (b
->cond_string
!= NULL
)
1751 b
->cond_exp
.reset ();
1754 b
->cond_exp
= parse_exp_1 (&s
, 0, b
->cond_exp_valid_block
, 0);
1758 /* If we failed to parse the expression, for example because
1759 it refers to a global variable in a not-yet-loaded shared library,
1760 don't try to insert watchpoint. We don't automatically delete
1761 such watchpoint, though, since failure to parse expression
1762 is different from out-of-scope watchpoint. */
1763 if (!target_has_execution
)
1765 /* Without execution, memory can't change. No use to try and
1766 set watchpoint locations. The watchpoint will be reset when
1767 the target gains execution, through breakpoint_re_set. */
1768 if (!can_use_hw_watchpoints
)
1770 if (b
->ops
->works_in_software_mode (b
))
1771 b
->type
= bp_watchpoint
;
1773 error (_("Can't set read/access watchpoint when "
1774 "hardware watchpoints are disabled."));
1777 else if (within_current_scope
&& b
->exp
)
1780 std::vector
<value_ref_ptr
> val_chain
;
1781 struct value
*v
, *result
;
1782 struct program_space
*frame_pspace
;
1784 fetch_subexp_value (b
->exp
.get (), &pc
, &v
, &result
, &val_chain
, 0);
1786 /* Avoid setting b->val if it's already set. The meaning of
1787 b->val is 'the last value' user saw, and we should update
1788 it only if we reported that last value to user. As it
1789 happens, the code that reports it updates b->val directly.
1790 We don't keep track of the memory value for masked
1792 if (!b
->val_valid
&& !is_masked_watchpoint (b
))
1794 if (b
->val_bitsize
!= 0)
1795 v
= extract_bitfield_from_watchpoint_value (b
, v
);
1796 b
->val
= release_value (v
);
1800 frame_pspace
= get_frame_program_space (get_selected_frame (NULL
));
1802 /* Look at each value on the value chain. */
1803 gdb_assert (!val_chain
.empty ());
1804 for (const value_ref_ptr
&iter
: val_chain
)
1808 /* If it's a memory location, and GDB actually needed
1809 its contents to evaluate the expression, then we
1810 must watch it. If the first value returned is
1811 still lazy, that means an error occurred reading it;
1812 watch it anyway in case it becomes readable. */
1813 if (VALUE_LVAL (v
) == lval_memory
1814 && (v
== val_chain
[0] || ! value_lazy (v
)))
1816 struct type
*vtype
= check_typedef (value_type (v
));
1818 /* We only watch structs and arrays if user asked
1819 for it explicitly, never if they just happen to
1820 appear in the middle of some value chain. */
1822 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1823 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1826 enum target_hw_bp_type type
;
1827 struct bp_location
*loc
, **tmp
;
1828 int bitpos
= 0, bitsize
= 0;
1830 if (value_bitsize (v
) != 0)
1832 /* Extract the bit parameters out from the bitfield
1834 bitpos
= value_bitpos (v
);
1835 bitsize
= value_bitsize (v
);
1837 else if (v
== result
&& b
->val_bitsize
!= 0)
1839 /* If VAL_BITSIZE != 0 then RESULT is actually a bitfield
1840 lvalue whose bit parameters are saved in the fields
1841 VAL_BITPOS and VAL_BITSIZE. */
1842 bitpos
= b
->val_bitpos
;
1843 bitsize
= b
->val_bitsize
;
1846 addr
= value_address (v
);
1849 /* Skip the bytes that don't contain the bitfield. */
1854 if (b
->type
== bp_read_watchpoint
)
1856 else if (b
->type
== bp_access_watchpoint
)
1859 loc
= allocate_bp_location (b
);
1860 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
1863 loc
->gdbarch
= get_type_arch (value_type (v
));
1865 loc
->pspace
= frame_pspace
;
1866 loc
->address
= address_significant (loc
->gdbarch
, addr
);
1870 /* Just cover the bytes that make up the bitfield. */
1871 loc
->length
= ((bitpos
% 8) + bitsize
+ 7) / 8;
1874 loc
->length
= TYPE_LENGTH (value_type (v
));
1876 loc
->watchpoint_type
= type
;
1881 /* Change the type of breakpoint between hardware assisted or
1882 an ordinary watchpoint depending on the hardware support
1883 and free hardware slots. REPARSE is set when the inferior
1888 enum bp_loc_type loc_type
;
1889 struct bp_location
*bl
;
1891 reg_cnt
= can_use_hardware_watchpoint (val_chain
);
1895 int i
, target_resources_ok
, other_type_used
;
1898 /* Use an exact watchpoint when there's only one memory region to be
1899 watched, and only one debug register is needed to watch it. */
1900 b
->exact
= target_exact_watchpoints
&& reg_cnt
== 1;
1902 /* We need to determine how many resources are already
1903 used for all other hardware watchpoints plus this one
1904 to see if we still have enough resources to also fit
1905 this watchpoint in as well. */
1907 /* If this is a software watchpoint, we try to turn it
1908 to a hardware one -- count resources as if B was of
1909 hardware watchpoint type. */
1911 if (type
== bp_watchpoint
)
1912 type
= bp_hardware_watchpoint
;
1914 /* This watchpoint may or may not have been placed on
1915 the list yet at this point (it won't be in the list
1916 if we're trying to create it for the first time,
1917 through watch_command), so always account for it
1920 /* Count resources used by all watchpoints except B. */
1921 i
= hw_watchpoint_used_count_others (b
, type
, &other_type_used
);
1923 /* Add in the resources needed for B. */
1924 i
+= hw_watchpoint_use_count (b
);
1927 = target_can_use_hardware_watchpoint (type
, i
, other_type_used
);
1928 if (target_resources_ok
<= 0)
1930 int sw_mode
= b
->ops
->works_in_software_mode (b
);
1932 if (target_resources_ok
== 0 && !sw_mode
)
1933 error (_("Target does not support this type of "
1934 "hardware watchpoint."));
1935 else if (target_resources_ok
< 0 && !sw_mode
)
1936 error (_("There are not enough available hardware "
1937 "resources for this watchpoint."));
1939 /* Downgrade to software watchpoint. */
1940 b
->type
= bp_watchpoint
;
1944 /* If this was a software watchpoint, we've just
1945 found we have enough resources to turn it to a
1946 hardware watchpoint. Otherwise, this is a
1951 else if (!b
->ops
->works_in_software_mode (b
))
1953 if (!can_use_hw_watchpoints
)
1954 error (_("Can't set read/access watchpoint when "
1955 "hardware watchpoints are disabled."));
1957 error (_("Expression cannot be implemented with "
1958 "read/access watchpoint."));
1961 b
->type
= bp_watchpoint
;
1963 loc_type
= (b
->type
== bp_watchpoint
? bp_loc_other
1964 : bp_loc_hardware_watchpoint
);
1965 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
1966 bl
->loc_type
= loc_type
;
1969 /* If a software watchpoint is not watching any memory, then the
1970 above left it without any location set up. But,
1971 bpstat_stop_status requires a location to be able to report
1972 stops, so make sure there's at least a dummy one. */
1973 if (b
->type
== bp_watchpoint
&& b
->loc
== NULL
)
1974 software_watchpoint_add_no_memory_location (b
, frame_pspace
);
1976 else if (!within_current_scope
)
1978 printf_filtered (_("\
1979 Watchpoint %d deleted because the program has left the block\n\
1980 in which its expression is valid.\n"),
1982 watchpoint_del_at_next_stop (b
);
1985 /* Restore the selected frame. */
1987 select_frame (frame_find_by_id (saved_frame_id
));
1991 /* Returns 1 iff breakpoint location should be
1992 inserted in the inferior. We don't differentiate the type of BL's owner
1993 (breakpoint vs. tracepoint), although insert_location in tracepoint's
1994 breakpoint_ops is not defined, because in insert_bp_location,
1995 tracepoint's insert_location will not be called. */
1997 should_be_inserted (struct bp_location
*bl
)
1999 if (bl
->owner
== NULL
|| !breakpoint_enabled (bl
->owner
))
2002 if (bl
->owner
->disposition
== disp_del_at_next_stop
)
2005 if (!bl
->enabled
|| bl
->shlib_disabled
|| bl
->duplicate
)
2008 if (user_breakpoint_p (bl
->owner
) && bl
->pspace
->executing_startup
)
2011 /* This is set for example, when we're attached to the parent of a
2012 vfork, and have detached from the child. The child is running
2013 free, and we expect it to do an exec or exit, at which point the
2014 OS makes the parent schedulable again (and the target reports
2015 that the vfork is done). Until the child is done with the shared
2016 memory region, do not insert breakpoints in the parent, otherwise
2017 the child could still trip on the parent's breakpoints. Since
2018 the parent is blocked anyway, it won't miss any breakpoint. */
2019 if (bl
->pspace
->breakpoints_not_allowed
)
2022 /* Don't insert a breakpoint if we're trying to step past its
2023 location, except if the breakpoint is a single-step breakpoint,
2024 and the breakpoint's thread is the thread which is stepping past
2026 if ((bl
->loc_type
== bp_loc_software_breakpoint
2027 || bl
->loc_type
== bp_loc_hardware_breakpoint
)
2028 && stepping_past_instruction_at (bl
->pspace
->aspace
,
2030 /* The single-step breakpoint may be inserted at the location
2031 we're trying to step if the instruction branches to itself.
2032 However, the instruction won't be executed at all and it may
2033 break the semantics of the instruction, for example, the
2034 instruction is a conditional branch or updates some flags.
2035 We can't fix it unless GDB is able to emulate the instruction
2036 or switch to displaced stepping. */
2037 && !(bl
->owner
->type
== bp_single_step
2038 && thread_is_stepping_over_breakpoint (bl
->owner
->thread
)))
2042 fprintf_unfiltered (gdb_stdlog
,
2043 "infrun: skipping breakpoint: "
2044 "stepping past insn at: %s\n",
2045 paddress (bl
->gdbarch
, bl
->address
));
2050 /* Don't insert watchpoints if we're trying to step past the
2051 instruction that triggered one. */
2052 if ((bl
->loc_type
== bp_loc_hardware_watchpoint
)
2053 && stepping_past_nonsteppable_watchpoint ())
2057 fprintf_unfiltered (gdb_stdlog
,
2058 "infrun: stepping past non-steppable watchpoint. "
2059 "skipping watchpoint at %s:%d\n",
2060 paddress (bl
->gdbarch
, bl
->address
),
2069 /* Same as should_be_inserted but does the check assuming
2070 that the location is not duplicated. */
2073 unduplicated_should_be_inserted (struct bp_location
*bl
)
2076 const int save_duplicate
= bl
->duplicate
;
2079 result
= should_be_inserted (bl
);
2080 bl
->duplicate
= save_duplicate
;
2084 /* Parses a conditional described by an expression COND into an
2085 agent expression bytecode suitable for evaluation
2086 by the bytecode interpreter. Return NULL if there was
2087 any error during parsing. */
2089 static agent_expr_up
2090 parse_cond_to_aexpr (CORE_ADDR scope
, struct expression
*cond
)
2095 agent_expr_up aexpr
;
2097 /* We don't want to stop processing, so catch any errors
2098 that may show up. */
2101 aexpr
= gen_eval_for_expr (scope
, cond
);
2104 CATCH (ex
, RETURN_MASK_ERROR
)
2106 /* If we got here, it means the condition could not be parsed to a valid
2107 bytecode expression and thus can't be evaluated on the target's side.
2108 It's no use iterating through the conditions. */
2112 /* We have a valid agent expression. */
2116 /* Based on location BL, create a list of breakpoint conditions to be
2117 passed on to the target. If we have duplicated locations with different
2118 conditions, we will add such conditions to the list. The idea is that the
2119 target will evaluate the list of conditions and will only notify GDB when
2120 one of them is true. */
2123 build_target_condition_list (struct bp_location
*bl
)
2125 struct bp_location
**locp
= NULL
, **loc2p
;
2126 int null_condition_or_parse_error
= 0;
2127 int modified
= bl
->needs_update
;
2128 struct bp_location
*loc
;
2130 /* Release conditions left over from a previous insert. */
2131 bl
->target_info
.conditions
.clear ();
2133 /* This is only meaningful if the target is
2134 evaluating conditions and if the user has
2135 opted for condition evaluation on the target's
2137 if (gdb_evaluates_breakpoint_condition_p ()
2138 || !target_supports_evaluation_of_breakpoint_conditions ())
2141 /* Do a first pass to check for locations with no assigned
2142 conditions or conditions that fail to parse to a valid agent expression
2143 bytecode. If any of these happen, then it's no use to send conditions
2144 to the target since this location will always trigger and generate a
2145 response back to GDB. */
2146 ALL_BP_LOCATIONS_AT_ADDR (loc2p
, locp
, bl
->address
)
2149 if (is_breakpoint (loc
->owner
) && loc
->pspace
->num
== bl
->pspace
->num
)
2153 /* Re-parse the conditions since something changed. In that
2154 case we already freed the condition bytecodes (see
2155 force_breakpoint_reinsertion). We just
2156 need to parse the condition to bytecodes again. */
2157 loc
->cond_bytecode
= parse_cond_to_aexpr (bl
->address
,
2161 /* If we have a NULL bytecode expression, it means something
2162 went wrong or we have a null condition expression. */
2163 if (!loc
->cond_bytecode
)
2165 null_condition_or_parse_error
= 1;
2171 /* If any of these happened, it means we will have to evaluate the conditions
2172 for the location's address on gdb's side. It is no use keeping bytecodes
2173 for all the other duplicate locations, thus we free all of them here.
2175 This is so we have a finer control over which locations' conditions are
2176 being evaluated by GDB or the remote stub. */
2177 if (null_condition_or_parse_error
)
2179 ALL_BP_LOCATIONS_AT_ADDR (loc2p
, locp
, bl
->address
)
2182 if (is_breakpoint (loc
->owner
) && loc
->pspace
->num
== bl
->pspace
->num
)
2184 /* Only go as far as the first NULL bytecode is
2186 if (!loc
->cond_bytecode
)
2189 loc
->cond_bytecode
.reset ();
2194 /* No NULL conditions or failed bytecode generation. Build a condition list
2195 for this location's address. */
2196 ALL_BP_LOCATIONS_AT_ADDR (loc2p
, locp
, bl
->address
)
2200 && is_breakpoint (loc
->owner
)
2201 && loc
->pspace
->num
== bl
->pspace
->num
2202 && loc
->owner
->enable_state
== bp_enabled
2205 /* Add the condition to the vector. This will be used later
2206 to send the conditions to the target. */
2207 bl
->target_info
.conditions
.push_back (loc
->cond_bytecode
.get ());
2214 /* Parses a command described by string CMD into an agent expression
2215 bytecode suitable for evaluation by the bytecode interpreter.
2216 Return NULL if there was any error during parsing. */
2218 static agent_expr_up
2219 parse_cmd_to_aexpr (CORE_ADDR scope
, char *cmd
)
2221 const char *cmdrest
;
2222 const char *format_start
, *format_end
;
2223 struct gdbarch
*gdbarch
= get_current_arch ();
2230 if (*cmdrest
== ',')
2232 cmdrest
= skip_spaces (cmdrest
);
2234 if (*cmdrest
++ != '"')
2235 error (_("No format string following the location"));
2237 format_start
= cmdrest
;
2239 format_pieces
fpieces (&cmdrest
);
2241 format_end
= cmdrest
;
2243 if (*cmdrest
++ != '"')
2244 error (_("Bad format string, non-terminated '\"'."));
2246 cmdrest
= skip_spaces (cmdrest
);
2248 if (!(*cmdrest
== ',' || *cmdrest
== '\0'))
2249 error (_("Invalid argument syntax"));
2251 if (*cmdrest
== ',')
2253 cmdrest
= skip_spaces (cmdrest
);
2255 /* For each argument, make an expression. */
2257 std::vector
<struct expression
*> argvec
;
2258 while (*cmdrest
!= '\0')
2263 expression_up expr
= parse_exp_1 (&cmd1
, scope
, block_for_pc (scope
), 1);
2264 argvec
.push_back (expr
.release ());
2266 if (*cmdrest
== ',')
2270 agent_expr_up aexpr
;
2272 /* We don't want to stop processing, so catch any errors
2273 that may show up. */
2276 aexpr
= gen_printf (scope
, gdbarch
, 0, 0,
2277 format_start
, format_end
- format_start
,
2278 argvec
.size (), argvec
.data ());
2280 CATCH (ex
, RETURN_MASK_ERROR
)
2282 /* If we got here, it means the command could not be parsed to a valid
2283 bytecode expression and thus can't be evaluated on the target's side.
2284 It's no use iterating through the other commands. */
2288 /* We have a valid agent expression, return it. */
2292 /* Based on location BL, create a list of breakpoint commands to be
2293 passed on to the target. If we have duplicated locations with
2294 different commands, we will add any such to the list. */
2297 build_target_command_list (struct bp_location
*bl
)
2299 struct bp_location
**locp
= NULL
, **loc2p
;
2300 int null_command_or_parse_error
= 0;
2301 int modified
= bl
->needs_update
;
2302 struct bp_location
*loc
;
2304 /* Clear commands left over from a previous insert. */
2305 bl
->target_info
.tcommands
.clear ();
2307 if (!target_can_run_breakpoint_commands ())
2310 /* For now, limit to agent-style dprintf breakpoints. */
2311 if (dprintf_style
!= dprintf_style_agent
)
2314 /* For now, if we have any duplicate location that isn't a dprintf,
2315 don't install the target-side commands, as that would make the
2316 breakpoint not be reported to the core, and we'd lose
2318 ALL_BP_LOCATIONS_AT_ADDR (loc2p
, locp
, bl
->address
)
2321 if (is_breakpoint (loc
->owner
)
2322 && loc
->pspace
->num
== bl
->pspace
->num
2323 && loc
->owner
->type
!= bp_dprintf
)
2327 /* Do a first pass to check for locations with no assigned
2328 conditions or conditions that fail to parse to a valid agent expression
2329 bytecode. If any of these happen, then it's no use to send conditions
2330 to the target since this location will always trigger and generate a
2331 response back to GDB. */
2332 ALL_BP_LOCATIONS_AT_ADDR (loc2p
, locp
, bl
->address
)
2335 if (is_breakpoint (loc
->owner
) && loc
->pspace
->num
== bl
->pspace
->num
)
2339 /* Re-parse the commands since something changed. In that
2340 case we already freed the command bytecodes (see
2341 force_breakpoint_reinsertion). We just
2342 need to parse the command to bytecodes again. */
2344 = parse_cmd_to_aexpr (bl
->address
,
2345 loc
->owner
->extra_string
);
2348 /* If we have a NULL bytecode expression, it means something
2349 went wrong or we have a null command expression. */
2350 if (!loc
->cmd_bytecode
)
2352 null_command_or_parse_error
= 1;
2358 /* If anything failed, then we're not doing target-side commands,
2360 if (null_command_or_parse_error
)
2362 ALL_BP_LOCATIONS_AT_ADDR (loc2p
, locp
, bl
->address
)
2365 if (is_breakpoint (loc
->owner
)
2366 && loc
->pspace
->num
== bl
->pspace
->num
)
2368 /* Only go as far as the first NULL bytecode is
2370 if (loc
->cmd_bytecode
== NULL
)
2373 loc
->cmd_bytecode
.reset ();
2378 /* No NULL commands or failed bytecode generation. Build a command list
2379 for this location's address. */
2380 ALL_BP_LOCATIONS_AT_ADDR (loc2p
, locp
, bl
->address
)
2383 if (loc
->owner
->extra_string
2384 && is_breakpoint (loc
->owner
)
2385 && loc
->pspace
->num
== bl
->pspace
->num
2386 && loc
->owner
->enable_state
== bp_enabled
2389 /* Add the command to the vector. This will be used later
2390 to send the commands to the target. */
2391 bl
->target_info
.tcommands
.push_back (loc
->cmd_bytecode
.get ());
2395 bl
->target_info
.persist
= 0;
2396 /* Maybe flag this location as persistent. */
2397 if (bl
->owner
->type
== bp_dprintf
&& disconnected_dprintf
)
2398 bl
->target_info
.persist
= 1;
2401 /* Return the kind of breakpoint on address *ADDR. Get the kind
2402 of breakpoint according to ADDR except single-step breakpoint.
2403 Get the kind of single-step breakpoint according to the current
2407 breakpoint_kind (struct bp_location
*bl
, CORE_ADDR
*addr
)
2409 if (bl
->owner
->type
== bp_single_step
)
2411 struct thread_info
*thr
= find_thread_global_id (bl
->owner
->thread
);
2412 struct regcache
*regcache
;
2414 regcache
= get_thread_regcache (thr
);
2416 return gdbarch_breakpoint_kind_from_current_state (bl
->gdbarch
,
2420 return gdbarch_breakpoint_kind_from_pc (bl
->gdbarch
, addr
);
2423 /* Insert a low-level "breakpoint" of some type. BL is the breakpoint
2424 location. Any error messages are printed to TMP_ERROR_STREAM; and
2425 DISABLED_BREAKS, and HW_BREAKPOINT_ERROR are used to report problems.
2426 Returns 0 for success, 1 if the bp_location type is not supported or
2429 NOTE drow/2003-09-09: This routine could be broken down to an
2430 object-style method for each breakpoint or catchpoint type. */
2432 insert_bp_location (struct bp_location
*bl
,
2433 struct ui_file
*tmp_error_stream
,
2434 int *disabled_breaks
,
2435 int *hw_breakpoint_error
,
2436 int *hw_bp_error_explained_already
)
2438 gdb_exception bp_excpt
= exception_none
;
2440 if (!should_be_inserted (bl
) || (bl
->inserted
&& !bl
->needs_update
))
2443 /* Note we don't initialize bl->target_info, as that wipes out
2444 the breakpoint location's shadow_contents if the breakpoint
2445 is still inserted at that location. This in turn breaks
2446 target_read_memory which depends on these buffers when
2447 a memory read is requested at the breakpoint location:
2448 Once the target_info has been wiped, we fail to see that
2449 we have a breakpoint inserted at that address and thus
2450 read the breakpoint instead of returning the data saved in
2451 the breakpoint location's shadow contents. */
2452 bl
->target_info
.reqstd_address
= bl
->address
;
2453 bl
->target_info
.placed_address_space
= bl
->pspace
->aspace
;
2454 bl
->target_info
.length
= bl
->length
;
2456 /* When working with target-side conditions, we must pass all the conditions
2457 for the same breakpoint address down to the target since GDB will not
2458 insert those locations. With a list of breakpoint conditions, the target
2459 can decide when to stop and notify GDB. */
2461 if (is_breakpoint (bl
->owner
))
2463 build_target_condition_list (bl
);
2464 build_target_command_list (bl
);
2465 /* Reset the modification marker. */
2466 bl
->needs_update
= 0;
2469 if (bl
->loc_type
== bp_loc_software_breakpoint
2470 || bl
->loc_type
== bp_loc_hardware_breakpoint
)
2472 if (bl
->owner
->type
!= bp_hardware_breakpoint
)
2474 /* If the explicitly specified breakpoint type
2475 is not hardware breakpoint, check the memory map to see
2476 if the breakpoint address is in read only memory or not.
2478 Two important cases are:
2479 - location type is not hardware breakpoint, memory
2480 is readonly. We change the type of the location to
2481 hardware breakpoint.
2482 - location type is hardware breakpoint, memory is
2483 read-write. This means we've previously made the
2484 location hardware one, but then the memory map changed,
2487 When breakpoints are removed, remove_breakpoints will use
2488 location types we've just set here, the only possible
2489 problem is that memory map has changed during running
2490 program, but it's not going to work anyway with current
2492 struct mem_region
*mr
2493 = lookup_mem_region (bl
->target_info
.reqstd_address
);
2497 if (automatic_hardware_breakpoints
)
2499 enum bp_loc_type new_type
;
2501 if (mr
->attrib
.mode
!= MEM_RW
)
2502 new_type
= bp_loc_hardware_breakpoint
;
2504 new_type
= bp_loc_software_breakpoint
;
2506 if (new_type
!= bl
->loc_type
)
2508 static int said
= 0;
2510 bl
->loc_type
= new_type
;
2513 fprintf_filtered (gdb_stdout
,
2514 _("Note: automatically using "
2515 "hardware breakpoints for "
2516 "read-only addresses.\n"));
2521 else if (bl
->loc_type
== bp_loc_software_breakpoint
2522 && mr
->attrib
.mode
!= MEM_RW
)
2524 fprintf_unfiltered (tmp_error_stream
,
2525 _("Cannot insert breakpoint %d.\n"
2526 "Cannot set software breakpoint "
2527 "at read-only address %s\n"),
2529 paddress (bl
->gdbarch
, bl
->address
));
2535 /* First check to see if we have to handle an overlay. */
2536 if (overlay_debugging
== ovly_off
2537 || bl
->section
== NULL
2538 || !(section_is_overlay (bl
->section
)))
2540 /* No overlay handling: just set the breakpoint. */
2545 val
= bl
->owner
->ops
->insert_location (bl
);
2547 bp_excpt
= gdb_exception
{RETURN_ERROR
, GENERIC_ERROR
};
2549 CATCH (e
, RETURN_MASK_ALL
)
2557 /* This breakpoint is in an overlay section.
2558 Shall we set a breakpoint at the LMA? */
2559 if (!overlay_events_enabled
)
2561 /* Yes -- overlay event support is not active,
2562 so we must try to set a breakpoint at the LMA.
2563 This will not work for a hardware breakpoint. */
2564 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
2565 warning (_("hardware breakpoint %d not supported in overlay!"),
2569 CORE_ADDR addr
= overlay_unmapped_address (bl
->address
,
2571 /* Set a software (trap) breakpoint at the LMA. */
2572 bl
->overlay_target_info
= bl
->target_info
;
2573 bl
->overlay_target_info
.reqstd_address
= addr
;
2575 /* No overlay handling: just set the breakpoint. */
2580 bl
->overlay_target_info
.kind
2581 = breakpoint_kind (bl
, &addr
);
2582 bl
->overlay_target_info
.placed_address
= addr
;
2583 val
= target_insert_breakpoint (bl
->gdbarch
,
2584 &bl
->overlay_target_info
);
2587 = gdb_exception
{RETURN_ERROR
, GENERIC_ERROR
};
2589 CATCH (e
, RETURN_MASK_ALL
)
2595 if (bp_excpt
.reason
!= 0)
2596 fprintf_unfiltered (tmp_error_stream
,
2597 "Overlay breakpoint %d "
2598 "failed: in ROM?\n",
2602 /* Shall we set a breakpoint at the VMA? */
2603 if (section_is_mapped (bl
->section
))
2605 /* Yes. This overlay section is mapped into memory. */
2610 val
= bl
->owner
->ops
->insert_location (bl
);
2612 bp_excpt
= gdb_exception
{RETURN_ERROR
, GENERIC_ERROR
};
2614 CATCH (e
, RETURN_MASK_ALL
)
2622 /* No. This breakpoint will not be inserted.
2623 No error, but do not mark the bp as 'inserted'. */
2628 if (bp_excpt
.reason
!= 0)
2630 /* Can't set the breakpoint. */
2632 /* In some cases, we might not be able to insert a
2633 breakpoint in a shared library that has already been
2634 removed, but we have not yet processed the shlib unload
2635 event. Unfortunately, some targets that implement
2636 breakpoint insertion themselves can't tell why the
2637 breakpoint insertion failed (e.g., the remote target
2638 doesn't define error codes), so we must treat generic
2639 errors as memory errors. */
2640 if (bp_excpt
.reason
== RETURN_ERROR
2641 && (bp_excpt
.error
== GENERIC_ERROR
2642 || bp_excpt
.error
== MEMORY_ERROR
)
2643 && bl
->loc_type
== bp_loc_software_breakpoint
2644 && (solib_name_from_address (bl
->pspace
, bl
->address
)
2645 || shared_objfile_contains_address_p (bl
->pspace
,
2648 /* See also: disable_breakpoints_in_shlibs. */
2649 bl
->shlib_disabled
= 1;
2650 gdb::observers::breakpoint_modified
.notify (bl
->owner
);
2651 if (!*disabled_breaks
)
2653 fprintf_unfiltered (tmp_error_stream
,
2654 "Cannot insert breakpoint %d.\n",
2656 fprintf_unfiltered (tmp_error_stream
,
2657 "Temporarily disabling shared "
2658 "library breakpoints:\n");
2660 *disabled_breaks
= 1;
2661 fprintf_unfiltered (tmp_error_stream
,
2662 "breakpoint #%d\n", bl
->owner
->number
);
2667 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
2669 *hw_breakpoint_error
= 1;
2670 *hw_bp_error_explained_already
= bp_excpt
.message
!= NULL
;
2671 fprintf_unfiltered (tmp_error_stream
,
2672 "Cannot insert hardware breakpoint %d%s",
2674 bp_excpt
.message
? ":" : ".\n");
2675 if (bp_excpt
.message
!= NULL
)
2676 fprintf_unfiltered (tmp_error_stream
, "%s.\n",
2681 if (bp_excpt
.message
== NULL
)
2684 = memory_error_message (TARGET_XFER_E_IO
,
2685 bl
->gdbarch
, bl
->address
);
2687 fprintf_unfiltered (tmp_error_stream
,
2688 "Cannot insert breakpoint %d.\n"
2690 bl
->owner
->number
, message
.c_str ());
2694 fprintf_unfiltered (tmp_error_stream
,
2695 "Cannot insert breakpoint %d: %s\n",
2710 else if (bl
->loc_type
== bp_loc_hardware_watchpoint
2711 /* NOTE drow/2003-09-08: This state only exists for removing
2712 watchpoints. It's not clear that it's necessary... */
2713 && bl
->owner
->disposition
!= disp_del_at_next_stop
)
2717 gdb_assert (bl
->owner
->ops
!= NULL
2718 && bl
->owner
->ops
->insert_location
!= NULL
);
2720 val
= bl
->owner
->ops
->insert_location (bl
);
2722 /* If trying to set a read-watchpoint, and it turns out it's not
2723 supported, try emulating one with an access watchpoint. */
2724 if (val
== 1 && bl
->watchpoint_type
== hw_read
)
2726 struct bp_location
*loc
, **loc_temp
;
2728 /* But don't try to insert it, if there's already another
2729 hw_access location that would be considered a duplicate
2731 ALL_BP_LOCATIONS (loc
, loc_temp
)
2733 && loc
->watchpoint_type
== hw_access
2734 && watchpoint_locations_match (bl
, loc
))
2738 bl
->target_info
= loc
->target_info
;
2739 bl
->watchpoint_type
= hw_access
;
2746 bl
->watchpoint_type
= hw_access
;
2747 val
= bl
->owner
->ops
->insert_location (bl
);
2750 /* Back to the original value. */
2751 bl
->watchpoint_type
= hw_read
;
2755 bl
->inserted
= (val
== 0);
2758 else if (bl
->owner
->type
== bp_catchpoint
)
2762 gdb_assert (bl
->owner
->ops
!= NULL
2763 && bl
->owner
->ops
->insert_location
!= NULL
);
2765 val
= bl
->owner
->ops
->insert_location (bl
);
2768 bl
->owner
->enable_state
= bp_disabled
;
2772 Error inserting catchpoint %d: Your system does not support this type\n\
2773 of catchpoint."), bl
->owner
->number
);
2775 warning (_("Error inserting catchpoint %d."), bl
->owner
->number
);
2778 bl
->inserted
= (val
== 0);
2780 /* We've already printed an error message if there was a problem
2781 inserting this catchpoint, and we've disabled the catchpoint,
2782 so just return success. */
2789 /* This function is called when program space PSPACE is about to be
2790 deleted. It takes care of updating breakpoints to not reference
2794 breakpoint_program_space_exit (struct program_space
*pspace
)
2796 struct breakpoint
*b
, *b_temp
;
2797 struct bp_location
*loc
, **loc_temp
;
2799 /* Remove any breakpoint that was set through this program space. */
2800 ALL_BREAKPOINTS_SAFE (b
, b_temp
)
2802 if (b
->pspace
== pspace
)
2803 delete_breakpoint (b
);
2806 /* Breakpoints set through other program spaces could have locations
2807 bound to PSPACE as well. Remove those. */
2808 ALL_BP_LOCATIONS (loc
, loc_temp
)
2810 struct bp_location
*tmp
;
2812 if (loc
->pspace
== pspace
)
2814 /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */
2815 if (loc
->owner
->loc
== loc
)
2816 loc
->owner
->loc
= loc
->next
;
2818 for (tmp
= loc
->owner
->loc
; tmp
->next
!= NULL
; tmp
= tmp
->next
)
2819 if (tmp
->next
== loc
)
2821 tmp
->next
= loc
->next
;
2827 /* Now update the global location list to permanently delete the
2828 removed locations above. */
2829 update_global_location_list (UGLL_DONT_INSERT
);
2832 /* Make sure all breakpoints are inserted in inferior.
2833 Throws exception on any error.
2834 A breakpoint that is already inserted won't be inserted
2835 again, so calling this function twice is safe. */
2837 insert_breakpoints (void)
2839 struct breakpoint
*bpt
;
2841 ALL_BREAKPOINTS (bpt
)
2842 if (is_hardware_watchpoint (bpt
))
2844 struct watchpoint
*w
= (struct watchpoint
*) bpt
;
2846 update_watchpoint (w
, 0 /* don't reparse. */);
2849 /* Updating watchpoints creates new locations, so update the global
2850 location list. Explicitly tell ugll to insert locations and
2851 ignore breakpoints_always_inserted_mode. */
2852 update_global_location_list (UGLL_INSERT
);
2855 /* Invoke CALLBACK for each of bp_location. */
2858 iterate_over_bp_locations (walk_bp_location_callback callback
)
2860 struct bp_location
*loc
, **loc_tmp
;
2862 ALL_BP_LOCATIONS (loc
, loc_tmp
)
2864 callback (loc
, NULL
);
2868 /* This is used when we need to synch breakpoint conditions between GDB and the
2869 target. It is the case with deleting and disabling of breakpoints when using
2870 always-inserted mode. */
2873 update_inserted_breakpoint_locations (void)
2875 struct bp_location
*bl
, **blp_tmp
;
2878 int disabled_breaks
= 0;
2879 int hw_breakpoint_error
= 0;
2880 int hw_bp_details_reported
= 0;
2882 string_file tmp_error_stream
;
2884 /* Explicitly mark the warning -- this will only be printed if
2885 there was an error. */
2886 tmp_error_stream
.puts ("Warning:\n");
2888 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
2890 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2892 /* We only want to update software breakpoints and hardware
2894 if (!is_breakpoint (bl
->owner
))
2897 /* We only want to update locations that are already inserted
2898 and need updating. This is to avoid unwanted insertion during
2899 deletion of breakpoints. */
2900 if (!bl
->inserted
|| !bl
->needs_update
)
2903 switch_to_program_space_and_thread (bl
->pspace
);
2905 /* For targets that support global breakpoints, there's no need
2906 to select an inferior to insert breakpoint to. In fact, even
2907 if we aren't attached to any process yet, we should still
2908 insert breakpoints. */
2909 if (!gdbarch_has_global_breakpoints (target_gdbarch ())
2910 && inferior_ptid
== null_ptid
)
2913 val
= insert_bp_location (bl
, &tmp_error_stream
, &disabled_breaks
,
2914 &hw_breakpoint_error
, &hw_bp_details_reported
);
2921 target_terminal::ours_for_output ();
2922 error_stream (tmp_error_stream
);
2926 /* Used when starting or continuing the program. */
2929 insert_breakpoint_locations (void)
2931 struct breakpoint
*bpt
;
2932 struct bp_location
*bl
, **blp_tmp
;
2935 int disabled_breaks
= 0;
2936 int hw_breakpoint_error
= 0;
2937 int hw_bp_error_explained_already
= 0;
2939 string_file tmp_error_stream
;
2941 /* Explicitly mark the warning -- this will only be printed if
2942 there was an error. */
2943 tmp_error_stream
.puts ("Warning:\n");
2945 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
2947 ALL_BP_LOCATIONS (bl
, blp_tmp
)
2949 if (!should_be_inserted (bl
) || (bl
->inserted
&& !bl
->needs_update
))
2952 /* There is no point inserting thread-specific breakpoints if
2953 the thread no longer exists. ALL_BP_LOCATIONS bp_location
2954 has BL->OWNER always non-NULL. */
2955 if (bl
->owner
->thread
!= -1
2956 && !valid_global_thread_id (bl
->owner
->thread
))
2959 switch_to_program_space_and_thread (bl
->pspace
);
2961 /* For targets that support global breakpoints, there's no need
2962 to select an inferior to insert breakpoint to. In fact, even
2963 if we aren't attached to any process yet, we should still
2964 insert breakpoints. */
2965 if (!gdbarch_has_global_breakpoints (target_gdbarch ())
2966 && inferior_ptid
== null_ptid
)
2969 val
= insert_bp_location (bl
, &tmp_error_stream
, &disabled_breaks
,
2970 &hw_breakpoint_error
, &hw_bp_error_explained_already
);
2975 /* If we failed to insert all locations of a watchpoint, remove
2976 them, as half-inserted watchpoint is of limited use. */
2977 ALL_BREAKPOINTS (bpt
)
2979 int some_failed
= 0;
2980 struct bp_location
*loc
;
2982 if (!is_hardware_watchpoint (bpt
))
2985 if (!breakpoint_enabled (bpt
))
2988 if (bpt
->disposition
== disp_del_at_next_stop
)
2991 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
2992 if (!loc
->inserted
&& should_be_inserted (loc
))
2999 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
3001 remove_breakpoint (loc
);
3003 hw_breakpoint_error
= 1;
3004 tmp_error_stream
.printf ("Could not insert "
3005 "hardware watchpoint %d.\n",
3013 /* If a hardware breakpoint or watchpoint was inserted, add a
3014 message about possibly exhausted resources. */
3015 if (hw_breakpoint_error
&& !hw_bp_error_explained_already
)
3017 tmp_error_stream
.printf ("Could not insert hardware breakpoints:\n\
3018 You may have requested too many hardware breakpoints/watchpoints.\n");
3020 target_terminal::ours_for_output ();
3021 error_stream (tmp_error_stream
);
3025 /* Used when the program stops.
3026 Returns zero if successful, or non-zero if there was a problem
3027 removing a breakpoint location. */
3030 remove_breakpoints (void)
3032 struct bp_location
*bl
, **blp_tmp
;
3035 ALL_BP_LOCATIONS (bl
, blp_tmp
)
3037 if (bl
->inserted
&& !is_tracepoint (bl
->owner
))
3038 val
|= remove_breakpoint (bl
);
3043 /* When a thread exits, remove breakpoints that are related to
3047 remove_threaded_breakpoints (struct thread_info
*tp
, int silent
)
3049 struct breakpoint
*b
, *b_tmp
;
3051 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
3053 if (b
->thread
== tp
->global_num
&& user_breakpoint_p (b
))
3055 b
->disposition
= disp_del_at_next_stop
;
3057 printf_filtered (_("\
3058 Thread-specific breakpoint %d deleted - thread %s no longer in the thread list.\n"),
3059 b
->number
, print_thread_id (tp
));
3061 /* Hide it from the user. */
3067 /* Remove breakpoints of inferior INF. */
3070 remove_breakpoints_inf (inferior
*inf
)
3072 struct bp_location
*bl
, **blp_tmp
;
3075 ALL_BP_LOCATIONS (bl
, blp_tmp
)
3077 if (bl
->pspace
!= inf
->pspace
)
3080 if (bl
->inserted
&& !bl
->target_info
.persist
)
3082 val
= remove_breakpoint (bl
);
3090 static int internal_breakpoint_number
= -1;
3092 /* Set the breakpoint number of B, depending on the value of INTERNAL.
3093 If INTERNAL is non-zero, the breakpoint number will be populated
3094 from internal_breakpoint_number and that variable decremented.
3095 Otherwise the breakpoint number will be populated from
3096 breakpoint_count and that value incremented. Internal breakpoints
3097 do not set the internal var bpnum. */
3099 set_breakpoint_number (int internal
, struct breakpoint
*b
)
3102 b
->number
= internal_breakpoint_number
--;
3105 set_breakpoint_count (breakpoint_count
+ 1);
3106 b
->number
= breakpoint_count
;
3110 static struct breakpoint
*
3111 create_internal_breakpoint (struct gdbarch
*gdbarch
,
3112 CORE_ADDR address
, enum bptype type
,
3113 const struct breakpoint_ops
*ops
)
3115 symtab_and_line sal
;
3117 sal
.section
= find_pc_overlay (sal
.pc
);
3118 sal
.pspace
= current_program_space
;
3120 breakpoint
*b
= set_raw_breakpoint (gdbarch
, sal
, type
, ops
);
3121 b
->number
= internal_breakpoint_number
--;
3122 b
->disposition
= disp_donttouch
;
3127 static const char *const longjmp_names
[] =
3129 "longjmp", "_longjmp", "siglongjmp", "_siglongjmp"
3131 #define NUM_LONGJMP_NAMES ARRAY_SIZE(longjmp_names)
3133 /* Per-objfile data private to breakpoint.c. */
3134 struct breakpoint_objfile_data
3136 /* Minimal symbol for "_ovly_debug_event" (if any). */
3137 struct bound_minimal_symbol overlay_msym
{};
3139 /* Minimal symbol(s) for "longjmp", "siglongjmp", etc. (if any). */
3140 struct bound_minimal_symbol longjmp_msym
[NUM_LONGJMP_NAMES
] {};
3142 /* True if we have looked for longjmp probes. */
3143 int longjmp_searched
= 0;
3145 /* SystemTap probe points for longjmp (if any). These are non-owning
3147 std::vector
<probe
*> longjmp_probes
;
3149 /* Minimal symbol for "std::terminate()" (if any). */
3150 struct bound_minimal_symbol terminate_msym
{};
3152 /* Minimal symbol for "_Unwind_DebugHook" (if any). */
3153 struct bound_minimal_symbol exception_msym
{};
3155 /* True if we have looked for exception probes. */
3156 int exception_searched
= 0;
3158 /* SystemTap probe points for unwinding (if any). These are non-owning
3160 std::vector
<probe
*> exception_probes
;
3163 static const struct objfile_data
*breakpoint_objfile_key
;
3165 /* Minimal symbol not found sentinel. */
3166 static struct minimal_symbol msym_not_found
;
3168 /* Returns TRUE if MSYM point to the "not found" sentinel. */
3171 msym_not_found_p (const struct minimal_symbol
*msym
)
3173 return msym
== &msym_not_found
;
3176 /* Return per-objfile data needed by breakpoint.c.
3177 Allocate the data if necessary. */
3179 static struct breakpoint_objfile_data
*
3180 get_breakpoint_objfile_data (struct objfile
*objfile
)
3182 struct breakpoint_objfile_data
*bp_objfile_data
;
3184 bp_objfile_data
= ((struct breakpoint_objfile_data
*)
3185 objfile_data (objfile
, breakpoint_objfile_key
));
3186 if (bp_objfile_data
== NULL
)
3188 bp_objfile_data
= new breakpoint_objfile_data ();
3189 set_objfile_data (objfile
, breakpoint_objfile_key
, bp_objfile_data
);
3191 return bp_objfile_data
;
3195 free_breakpoint_objfile_data (struct objfile
*obj
, void *data
)
3197 struct breakpoint_objfile_data
*bp_objfile_data
3198 = (struct breakpoint_objfile_data
*) data
;
3200 delete bp_objfile_data
;
3204 create_overlay_event_breakpoint (void)
3206 const char *const func_name
= "_ovly_debug_event";
3208 for (objfile
*objfile
: current_program_space
->objfiles ())
3210 struct breakpoint
*b
;
3211 struct breakpoint_objfile_data
*bp_objfile_data
;
3213 struct explicit_location explicit_loc
;
3215 bp_objfile_data
= get_breakpoint_objfile_data (objfile
);
3217 if (msym_not_found_p (bp_objfile_data
->overlay_msym
.minsym
))
3220 if (bp_objfile_data
->overlay_msym
.minsym
== NULL
)
3222 struct bound_minimal_symbol m
;
3224 m
= lookup_minimal_symbol_text (func_name
, objfile
);
3225 if (m
.minsym
== NULL
)
3227 /* Avoid future lookups in this objfile. */
3228 bp_objfile_data
->overlay_msym
.minsym
= &msym_not_found
;
3231 bp_objfile_data
->overlay_msym
= m
;
3234 addr
= BMSYMBOL_VALUE_ADDRESS (bp_objfile_data
->overlay_msym
);
3235 b
= create_internal_breakpoint (get_objfile_arch (objfile
), addr
,
3237 &internal_breakpoint_ops
);
3238 initialize_explicit_location (&explicit_loc
);
3239 explicit_loc
.function_name
= ASTRDUP (func_name
);
3240 b
->location
= new_explicit_location (&explicit_loc
);
3242 if (overlay_debugging
== ovly_auto
)
3244 b
->enable_state
= bp_enabled
;
3245 overlay_events_enabled
= 1;
3249 b
->enable_state
= bp_disabled
;
3250 overlay_events_enabled
= 0;
3256 create_longjmp_master_breakpoint (void)
3258 struct program_space
*pspace
;
3260 scoped_restore_current_program_space restore_pspace
;
3262 ALL_PSPACES (pspace
)
3264 set_current_program_space (pspace
);
3266 for (objfile
*objfile
: current_program_space
->objfiles ())
3269 struct gdbarch
*gdbarch
;
3270 struct breakpoint_objfile_data
*bp_objfile_data
;
3272 gdbarch
= get_objfile_arch (objfile
);
3274 bp_objfile_data
= get_breakpoint_objfile_data (objfile
);
3276 if (!bp_objfile_data
->longjmp_searched
)
3278 std::vector
<probe
*> ret
3279 = find_probes_in_objfile (objfile
, "libc", "longjmp");
3283 /* We are only interested in checking one element. */
3286 if (!p
->can_evaluate_arguments ())
3288 /* We cannot use the probe interface here, because it does
3289 not know how to evaluate arguments. */
3293 bp_objfile_data
->longjmp_probes
= ret
;
3294 bp_objfile_data
->longjmp_searched
= 1;
3297 if (!bp_objfile_data
->longjmp_probes
.empty ())
3299 for (probe
*p
: bp_objfile_data
->longjmp_probes
)
3301 struct breakpoint
*b
;
3303 b
= create_internal_breakpoint (gdbarch
,
3304 p
->get_relocated_address (objfile
),
3306 &internal_breakpoint_ops
);
3307 b
->location
= new_probe_location ("-probe-stap libc:longjmp");
3308 b
->enable_state
= bp_disabled
;
3314 if (!gdbarch_get_longjmp_target_p (gdbarch
))
3317 for (i
= 0; i
< NUM_LONGJMP_NAMES
; i
++)
3319 struct breakpoint
*b
;
3320 const char *func_name
;
3322 struct explicit_location explicit_loc
;
3324 if (msym_not_found_p (bp_objfile_data
->longjmp_msym
[i
].minsym
))
3327 func_name
= longjmp_names
[i
];
3328 if (bp_objfile_data
->longjmp_msym
[i
].minsym
== NULL
)
3330 struct bound_minimal_symbol m
;
3332 m
= lookup_minimal_symbol_text (func_name
, objfile
);
3333 if (m
.minsym
== NULL
)
3335 /* Prevent future lookups in this objfile. */
3336 bp_objfile_data
->longjmp_msym
[i
].minsym
= &msym_not_found
;
3339 bp_objfile_data
->longjmp_msym
[i
] = m
;
3342 addr
= BMSYMBOL_VALUE_ADDRESS (bp_objfile_data
->longjmp_msym
[i
]);
3343 b
= create_internal_breakpoint (gdbarch
, addr
, bp_longjmp_master
,
3344 &internal_breakpoint_ops
);
3345 initialize_explicit_location (&explicit_loc
);
3346 explicit_loc
.function_name
= ASTRDUP (func_name
);
3347 b
->location
= new_explicit_location (&explicit_loc
);
3348 b
->enable_state
= bp_disabled
;
3354 /* Create a master std::terminate breakpoint. */
3356 create_std_terminate_master_breakpoint (void)
3358 struct program_space
*pspace
;
3359 const char *const func_name
= "std::terminate()";
3361 scoped_restore_current_program_space restore_pspace
;
3363 ALL_PSPACES (pspace
)
3367 set_current_program_space (pspace
);
3369 for (objfile
*objfile
: current_program_space
->objfiles ())
3371 struct breakpoint
*b
;
3372 struct breakpoint_objfile_data
*bp_objfile_data
;
3373 struct explicit_location explicit_loc
;
3375 bp_objfile_data
= get_breakpoint_objfile_data (objfile
);
3377 if (msym_not_found_p (bp_objfile_data
->terminate_msym
.minsym
))
3380 if (bp_objfile_data
->terminate_msym
.minsym
== NULL
)
3382 struct bound_minimal_symbol m
;
3384 m
= lookup_minimal_symbol (func_name
, NULL
, objfile
);
3385 if (m
.minsym
== NULL
|| (MSYMBOL_TYPE (m
.minsym
) != mst_text
3386 && MSYMBOL_TYPE (m
.minsym
) != mst_file_text
))
3388 /* Prevent future lookups in this objfile. */
3389 bp_objfile_data
->terminate_msym
.minsym
= &msym_not_found
;
3392 bp_objfile_data
->terminate_msym
= m
;
3395 addr
= BMSYMBOL_VALUE_ADDRESS (bp_objfile_data
->terminate_msym
);
3396 b
= create_internal_breakpoint (get_objfile_arch (objfile
), addr
,
3397 bp_std_terminate_master
,
3398 &internal_breakpoint_ops
);
3399 initialize_explicit_location (&explicit_loc
);
3400 explicit_loc
.function_name
= ASTRDUP (func_name
);
3401 b
->location
= new_explicit_location (&explicit_loc
);
3402 b
->enable_state
= bp_disabled
;
3407 /* Install a master breakpoint on the unwinder's debug hook. */
3410 create_exception_master_breakpoint (void)
3412 const char *const func_name
= "_Unwind_DebugHook";
3414 for (objfile
*objfile
: current_program_space
->objfiles ())
3416 struct breakpoint
*b
;
3417 struct gdbarch
*gdbarch
;
3418 struct breakpoint_objfile_data
*bp_objfile_data
;
3420 struct explicit_location explicit_loc
;
3422 bp_objfile_data
= get_breakpoint_objfile_data (objfile
);
3424 /* We prefer the SystemTap probe point if it exists. */
3425 if (!bp_objfile_data
->exception_searched
)
3427 std::vector
<probe
*> ret
3428 = find_probes_in_objfile (objfile
, "libgcc", "unwind");
3432 /* We are only interested in checking one element. */
3435 if (!p
->can_evaluate_arguments ())
3437 /* We cannot use the probe interface here, because it does
3438 not know how to evaluate arguments. */
3442 bp_objfile_data
->exception_probes
= ret
;
3443 bp_objfile_data
->exception_searched
= 1;
3446 if (!bp_objfile_data
->exception_probes
.empty ())
3448 gdbarch
= get_objfile_arch (objfile
);
3450 for (probe
*p
: bp_objfile_data
->exception_probes
)
3452 b
= create_internal_breakpoint (gdbarch
,
3453 p
->get_relocated_address (objfile
),
3454 bp_exception_master
,
3455 &internal_breakpoint_ops
);
3456 b
->location
= new_probe_location ("-probe-stap libgcc:unwind");
3457 b
->enable_state
= bp_disabled
;
3463 /* Otherwise, try the hook function. */
3465 if (msym_not_found_p (bp_objfile_data
->exception_msym
.minsym
))
3468 gdbarch
= get_objfile_arch (objfile
);
3470 if (bp_objfile_data
->exception_msym
.minsym
== NULL
)
3472 struct bound_minimal_symbol debug_hook
;
3474 debug_hook
= lookup_minimal_symbol (func_name
, NULL
, objfile
);
3475 if (debug_hook
.minsym
== NULL
)
3477 bp_objfile_data
->exception_msym
.minsym
= &msym_not_found
;
3481 bp_objfile_data
->exception_msym
= debug_hook
;
3484 addr
= BMSYMBOL_VALUE_ADDRESS (bp_objfile_data
->exception_msym
);
3485 addr
= gdbarch_convert_from_func_ptr_addr (gdbarch
, addr
,
3486 current_top_target ());
3487 b
= create_internal_breakpoint (gdbarch
, addr
, bp_exception_master
,
3488 &internal_breakpoint_ops
);
3489 initialize_explicit_location (&explicit_loc
);
3490 explicit_loc
.function_name
= ASTRDUP (func_name
);
3491 b
->location
= new_explicit_location (&explicit_loc
);
3492 b
->enable_state
= bp_disabled
;
3496 /* Does B have a location spec? */
3499 breakpoint_event_location_empty_p (const struct breakpoint
*b
)
3501 return b
->location
!= NULL
&& event_location_empty_p (b
->location
.get ());
3505 update_breakpoints_after_exec (void)
3507 struct breakpoint
*b
, *b_tmp
;
3508 struct bp_location
*bploc
, **bplocp_tmp
;
3510 /* We're about to delete breakpoints from GDB's lists. If the
3511 INSERTED flag is true, GDB will try to lift the breakpoints by
3512 writing the breakpoints' "shadow contents" back into memory. The
3513 "shadow contents" are NOT valid after an exec, so GDB should not
3514 do that. Instead, the target is responsible from marking
3515 breakpoints out as soon as it detects an exec. We don't do that
3516 here instead, because there may be other attempts to delete
3517 breakpoints after detecting an exec and before reaching here. */
3518 ALL_BP_LOCATIONS (bploc
, bplocp_tmp
)
3519 if (bploc
->pspace
== current_program_space
)
3520 gdb_assert (!bploc
->inserted
);
3522 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
3524 if (b
->pspace
!= current_program_space
)
3527 /* Solib breakpoints must be explicitly reset after an exec(). */
3528 if (b
->type
== bp_shlib_event
)
3530 delete_breakpoint (b
);
3534 /* JIT breakpoints must be explicitly reset after an exec(). */
3535 if (b
->type
== bp_jit_event
)
3537 delete_breakpoint (b
);
3541 /* Thread event breakpoints must be set anew after an exec(),
3542 as must overlay event and longjmp master breakpoints. */
3543 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
3544 || b
->type
== bp_longjmp_master
|| b
->type
== bp_std_terminate_master
3545 || b
->type
== bp_exception_master
)
3547 delete_breakpoint (b
);
3551 /* Step-resume breakpoints are meaningless after an exec(). */
3552 if (b
->type
== bp_step_resume
|| b
->type
== bp_hp_step_resume
)
3554 delete_breakpoint (b
);
3558 /* Just like single-step breakpoints. */
3559 if (b
->type
== bp_single_step
)
3561 delete_breakpoint (b
);
3565 /* Longjmp and longjmp-resume breakpoints are also meaningless
3567 if (b
->type
== bp_longjmp
|| b
->type
== bp_longjmp_resume
3568 || b
->type
== bp_longjmp_call_dummy
3569 || b
->type
== bp_exception
|| b
->type
== bp_exception_resume
)
3571 delete_breakpoint (b
);
3575 if (b
->type
== bp_catchpoint
)
3577 /* For now, none of the bp_catchpoint breakpoints need to
3578 do anything at this point. In the future, if some of
3579 the catchpoints need to something, we will need to add
3580 a new method, and call this method from here. */
3584 /* bp_finish is a special case. The only way we ought to be able
3585 to see one of these when an exec() has happened, is if the user
3586 caught a vfork, and then said "finish". Ordinarily a finish just
3587 carries them to the call-site of the current callee, by setting
3588 a temporary bp there and resuming. But in this case, the finish
3589 will carry them entirely through the vfork & exec.
3591 We don't want to allow a bp_finish to remain inserted now. But
3592 we can't safely delete it, 'cause finish_command has a handle to
3593 the bp on a bpstat, and will later want to delete it. There's a
3594 chance (and I've seen it happen) that if we delete the bp_finish
3595 here, that its storage will get reused by the time finish_command
3596 gets 'round to deleting the "use to be a bp_finish" breakpoint.
3597 We really must allow finish_command to delete a bp_finish.
3599 In the absence of a general solution for the "how do we know
3600 it's safe to delete something others may have handles to?"
3601 problem, what we'll do here is just uninsert the bp_finish, and
3602 let finish_command delete it.
3604 (We know the bp_finish is "doomed" in the sense that it's
3605 momentary, and will be deleted as soon as finish_command sees
3606 the inferior stopped. So it doesn't matter that the bp's
3607 address is probably bogus in the new a.out, unlike e.g., the
3608 solib breakpoints.) */
3610 if (b
->type
== bp_finish
)
3615 /* Without a symbolic address, we have little hope of the
3616 pre-exec() address meaning the same thing in the post-exec()
3618 if (breakpoint_event_location_empty_p (b
))
3620 delete_breakpoint (b
);
3627 detach_breakpoints (ptid_t ptid
)
3629 struct bp_location
*bl
, **blp_tmp
;
3631 scoped_restore save_inferior_ptid
= make_scoped_restore (&inferior_ptid
);
3632 struct inferior
*inf
= current_inferior ();
3634 if (ptid
.pid () == inferior_ptid
.pid ())
3635 error (_("Cannot detach breakpoints of inferior_ptid"));
3637 /* Set inferior_ptid; remove_breakpoint_1 uses this global. */
3638 inferior_ptid
= ptid
;
3639 ALL_BP_LOCATIONS (bl
, blp_tmp
)
3641 if (bl
->pspace
!= inf
->pspace
)
3644 /* This function must physically remove breakpoints locations
3645 from the specified ptid, without modifying the breakpoint
3646 package's state. Locations of type bp_loc_other are only
3647 maintained at GDB side. So, there is no need to remove
3648 these bp_loc_other locations. Moreover, removing these
3649 would modify the breakpoint package's state. */
3650 if (bl
->loc_type
== bp_loc_other
)
3654 val
|= remove_breakpoint_1 (bl
, DETACH_BREAKPOINT
);
3660 /* Remove the breakpoint location BL from the current address space.
3661 Note that this is used to detach breakpoints from a child fork.
3662 When we get here, the child isn't in the inferior list, and neither
3663 do we have objects to represent its address space --- we should
3664 *not* look at bl->pspace->aspace here. */
3667 remove_breakpoint_1 (struct bp_location
*bl
, enum remove_bp_reason reason
)
3671 /* BL is never in moribund_locations by our callers. */
3672 gdb_assert (bl
->owner
!= NULL
);
3674 /* The type of none suggests that owner is actually deleted.
3675 This should not ever happen. */
3676 gdb_assert (bl
->owner
->type
!= bp_none
);
3678 if (bl
->loc_type
== bp_loc_software_breakpoint
3679 || bl
->loc_type
== bp_loc_hardware_breakpoint
)
3681 /* "Normal" instruction breakpoint: either the standard
3682 trap-instruction bp (bp_breakpoint), or a
3683 bp_hardware_breakpoint. */
3685 /* First check to see if we have to handle an overlay. */
3686 if (overlay_debugging
== ovly_off
3687 || bl
->section
== NULL
3688 || !(section_is_overlay (bl
->section
)))
3690 /* No overlay handling: just remove the breakpoint. */
3692 /* If we're trying to uninsert a memory breakpoint that we
3693 know is set in a dynamic object that is marked
3694 shlib_disabled, then either the dynamic object was
3695 removed with "remove-symbol-file" or with
3696 "nosharedlibrary". In the former case, we don't know
3697 whether another dynamic object might have loaded over the
3698 breakpoint's address -- the user might well let us know
3699 about it next with add-symbol-file (the whole point of
3700 add-symbol-file is letting the user manually maintain a
3701 list of dynamically loaded objects). If we have the
3702 breakpoint's shadow memory, that is, this is a software
3703 breakpoint managed by GDB, check whether the breakpoint
3704 is still inserted in memory, to avoid overwriting wrong
3705 code with stale saved shadow contents. Note that HW
3706 breakpoints don't have shadow memory, as they're
3707 implemented using a mechanism that is not dependent on
3708 being able to modify the target's memory, and as such
3709 they should always be removed. */
3710 if (bl
->shlib_disabled
3711 && bl
->target_info
.shadow_len
!= 0
3712 && !memory_validate_breakpoint (bl
->gdbarch
, &bl
->target_info
))
3715 val
= bl
->owner
->ops
->remove_location (bl
, reason
);
3719 /* This breakpoint is in an overlay section.
3720 Did we set a breakpoint at the LMA? */
3721 if (!overlay_events_enabled
)
3723 /* Yes -- overlay event support is not active, so we
3724 should have set a breakpoint at the LMA. Remove it.
3726 /* Ignore any failures: if the LMA is in ROM, we will
3727 have already warned when we failed to insert it. */
3728 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
3729 target_remove_hw_breakpoint (bl
->gdbarch
,
3730 &bl
->overlay_target_info
);
3732 target_remove_breakpoint (bl
->gdbarch
,
3733 &bl
->overlay_target_info
,
3736 /* Did we set a breakpoint at the VMA?
3737 If so, we will have marked the breakpoint 'inserted'. */
3740 /* Yes -- remove it. Previously we did not bother to
3741 remove the breakpoint if the section had been
3742 unmapped, but let's not rely on that being safe. We
3743 don't know what the overlay manager might do. */
3745 /* However, we should remove *software* breakpoints only
3746 if the section is still mapped, or else we overwrite
3747 wrong code with the saved shadow contents. */
3748 if (bl
->loc_type
== bp_loc_hardware_breakpoint
3749 || section_is_mapped (bl
->section
))
3750 val
= bl
->owner
->ops
->remove_location (bl
, reason
);
3756 /* No -- not inserted, so no need to remove. No error. */
3761 /* In some cases, we might not be able to remove a breakpoint in
3762 a shared library that has already been removed, but we have
3763 not yet processed the shlib unload event. Similarly for an
3764 unloaded add-symbol-file object - the user might not yet have
3765 had the chance to remove-symbol-file it. shlib_disabled will
3766 be set if the library/object has already been removed, but
3767 the breakpoint hasn't been uninserted yet, e.g., after
3768 "nosharedlibrary" or "remove-symbol-file" with breakpoints
3769 always-inserted mode. */
3771 && (bl
->loc_type
== bp_loc_software_breakpoint
3772 && (bl
->shlib_disabled
3773 || solib_name_from_address (bl
->pspace
, bl
->address
)
3774 || shared_objfile_contains_address_p (bl
->pspace
,
3780 bl
->inserted
= (reason
== DETACH_BREAKPOINT
);
3782 else if (bl
->loc_type
== bp_loc_hardware_watchpoint
)
3784 gdb_assert (bl
->owner
->ops
!= NULL
3785 && bl
->owner
->ops
->remove_location
!= NULL
);
3787 bl
->inserted
= (reason
== DETACH_BREAKPOINT
);
3788 bl
->owner
->ops
->remove_location (bl
, reason
);
3790 /* Failure to remove any of the hardware watchpoints comes here. */
3791 if (reason
== REMOVE_BREAKPOINT
&& bl
->inserted
)
3792 warning (_("Could not remove hardware watchpoint %d."),
3795 else if (bl
->owner
->type
== bp_catchpoint
3796 && breakpoint_enabled (bl
->owner
)
3799 gdb_assert (bl
->owner
->ops
!= NULL
3800 && bl
->owner
->ops
->remove_location
!= NULL
);
3802 val
= bl
->owner
->ops
->remove_location (bl
, reason
);
3806 bl
->inserted
= (reason
== DETACH_BREAKPOINT
);
3813 remove_breakpoint (struct bp_location
*bl
)
3815 /* BL is never in moribund_locations by our callers. */
3816 gdb_assert (bl
->owner
!= NULL
);
3818 /* The type of none suggests that owner is actually deleted.
3819 This should not ever happen. */
3820 gdb_assert (bl
->owner
->type
!= bp_none
);
3822 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
3824 switch_to_program_space_and_thread (bl
->pspace
);
3826 return remove_breakpoint_1 (bl
, REMOVE_BREAKPOINT
);
3829 /* Clear the "inserted" flag in all breakpoints. */
3832 mark_breakpoints_out (void)
3834 struct bp_location
*bl
, **blp_tmp
;
3836 ALL_BP_LOCATIONS (bl
, blp_tmp
)
3837 if (bl
->pspace
== current_program_space
)
3841 /* Clear the "inserted" flag in all breakpoints and delete any
3842 breakpoints which should go away between runs of the program.
3844 Plus other such housekeeping that has to be done for breakpoints
3847 Note: this function gets called at the end of a run (by
3848 generic_mourn_inferior) and when a run begins (by
3849 init_wait_for_inferior). */
3854 breakpoint_init_inferior (enum inf_context context
)
3856 struct breakpoint
*b
, *b_tmp
;
3857 struct program_space
*pspace
= current_program_space
;
3859 /* If breakpoint locations are shared across processes, then there's
3861 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
3864 mark_breakpoints_out ();
3866 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
3868 if (b
->loc
&& b
->loc
->pspace
!= pspace
)
3874 case bp_longjmp_call_dummy
:
3876 /* If the call dummy breakpoint is at the entry point it will
3877 cause problems when the inferior is rerun, so we better get
3880 case bp_watchpoint_scope
:
3882 /* Also get rid of scope breakpoints. */
3884 case bp_shlib_event
:
3886 /* Also remove solib event breakpoints. Their addresses may
3887 have changed since the last time we ran the program.
3888 Actually we may now be debugging against different target;
3889 and so the solib backend that installed this breakpoint may
3890 not be used in by the target. E.g.,
3892 (gdb) file prog-linux
3893 (gdb) run # native linux target
3896 (gdb) file prog-win.exe
3897 (gdb) tar rem :9999 # remote Windows gdbserver.
3900 case bp_step_resume
:
3902 /* Also remove step-resume breakpoints. */
3904 case bp_single_step
:
3906 /* Also remove single-step breakpoints. */
3908 delete_breakpoint (b
);
3912 case bp_hardware_watchpoint
:
3913 case bp_read_watchpoint
:
3914 case bp_access_watchpoint
:
3916 struct watchpoint
*w
= (struct watchpoint
*) b
;
3918 /* Likewise for watchpoints on local expressions. */
3919 if (w
->exp_valid_block
!= NULL
)
3920 delete_breakpoint (b
);
3923 /* Get rid of existing locations, which are no longer
3924 valid. New ones will be created in
3925 update_watchpoint, when the inferior is restarted.
3926 The next update_global_location_list call will
3927 garbage collect them. */
3930 if (context
== inf_starting
)
3932 /* Reset val field to force reread of starting value in
3933 insert_breakpoints. */
3934 w
->val
.reset (nullptr);
3945 /* Get rid of the moribund locations. */
3946 for (bp_location
*bl
: moribund_locations
)
3947 decref_bp_location (&bl
);
3948 moribund_locations
.clear ();
3951 /* These functions concern about actual breakpoints inserted in the
3952 target --- to e.g. check if we need to do decr_pc adjustment or if
3953 we need to hop over the bkpt --- so we check for address space
3954 match, not program space. */
3956 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
3957 exists at PC. It returns ordinary_breakpoint_here if it's an
3958 ordinary breakpoint, or permanent_breakpoint_here if it's a
3959 permanent breakpoint.
3960 - When continuing from a location with an ordinary breakpoint, we
3961 actually single step once before calling insert_breakpoints.
3962 - When continuing from a location with a permanent breakpoint, we
3963 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
3964 the target, to advance the PC past the breakpoint. */
3966 enum breakpoint_here
3967 breakpoint_here_p (const address_space
*aspace
, CORE_ADDR pc
)
3969 struct bp_location
*bl
, **blp_tmp
;
3970 int any_breakpoint_here
= 0;
3972 ALL_BP_LOCATIONS (bl
, blp_tmp
)
3974 if (bl
->loc_type
!= bp_loc_software_breakpoint
3975 && bl
->loc_type
!= bp_loc_hardware_breakpoint
)
3978 /* ALL_BP_LOCATIONS bp_location has BL->OWNER always non-NULL. */
3979 if ((breakpoint_enabled (bl
->owner
)
3981 && breakpoint_location_address_match (bl
, aspace
, pc
))
3983 if (overlay_debugging
3984 && section_is_overlay (bl
->section
)
3985 && !section_is_mapped (bl
->section
))
3986 continue; /* unmapped overlay -- can't be a match */
3987 else if (bl
->permanent
)
3988 return permanent_breakpoint_here
;
3990 any_breakpoint_here
= 1;
3994 return any_breakpoint_here
? ordinary_breakpoint_here
: no_breakpoint_here
;
3997 /* See breakpoint.h. */
4000 breakpoint_in_range_p (const address_space
*aspace
,
4001 CORE_ADDR addr
, ULONGEST len
)
4003 struct bp_location
*bl
, **blp_tmp
;
4005 ALL_BP_LOCATIONS (bl
, blp_tmp
)
4007 if (bl
->loc_type
!= bp_loc_software_breakpoint
4008 && bl
->loc_type
!= bp_loc_hardware_breakpoint
)
4011 if ((breakpoint_enabled (bl
->owner
)
4013 && breakpoint_location_address_range_overlap (bl
, aspace
,
4016 if (overlay_debugging
4017 && section_is_overlay (bl
->section
)
4018 && !section_is_mapped (bl
->section
))
4020 /* Unmapped overlay -- can't be a match. */
4031 /* Return true if there's a moribund breakpoint at PC. */
4034 moribund_breakpoint_here_p (const address_space
*aspace
, CORE_ADDR pc
)
4036 for (bp_location
*loc
: moribund_locations
)
4037 if (breakpoint_location_address_match (loc
, aspace
, pc
))
4043 /* Returns non-zero iff BL is inserted at PC, in address space
4047 bp_location_inserted_here_p (struct bp_location
*bl
,
4048 const address_space
*aspace
, CORE_ADDR pc
)
4051 && breakpoint_address_match (bl
->pspace
->aspace
, bl
->address
,
4054 if (overlay_debugging
4055 && section_is_overlay (bl
->section
)
4056 && !section_is_mapped (bl
->section
))
4057 return 0; /* unmapped overlay -- can't be a match */
4064 /* Returns non-zero iff there's a breakpoint inserted at PC. */
4067 breakpoint_inserted_here_p (const address_space
*aspace
, CORE_ADDR pc
)
4069 struct bp_location
**blp
, **blp_tmp
= NULL
;
4071 ALL_BP_LOCATIONS_AT_ADDR (blp
, blp_tmp
, pc
)
4073 struct bp_location
*bl
= *blp
;
4075 if (bl
->loc_type
!= bp_loc_software_breakpoint
4076 && bl
->loc_type
!= bp_loc_hardware_breakpoint
)
4079 if (bp_location_inserted_here_p (bl
, aspace
, pc
))
4085 /* This function returns non-zero iff there is a software breakpoint
4089 software_breakpoint_inserted_here_p (const address_space
*aspace
,
4092 struct bp_location
**blp
, **blp_tmp
= NULL
;
4094 ALL_BP_LOCATIONS_AT_ADDR (blp
, blp_tmp
, pc
)
4096 struct bp_location
*bl
= *blp
;
4098 if (bl
->loc_type
!= bp_loc_software_breakpoint
)
4101 if (bp_location_inserted_here_p (bl
, aspace
, pc
))
4108 /* See breakpoint.h. */
4111 hardware_breakpoint_inserted_here_p (const address_space
*aspace
,
4114 struct bp_location
**blp
, **blp_tmp
= NULL
;
4116 ALL_BP_LOCATIONS_AT_ADDR (blp
, blp_tmp
, pc
)
4118 struct bp_location
*bl
= *blp
;
4120 if (bl
->loc_type
!= bp_loc_hardware_breakpoint
)
4123 if (bp_location_inserted_here_p (bl
, aspace
, pc
))
4131 hardware_watchpoint_inserted_in_range (const address_space
*aspace
,
4132 CORE_ADDR addr
, ULONGEST len
)
4134 struct breakpoint
*bpt
;
4136 ALL_BREAKPOINTS (bpt
)
4138 struct bp_location
*loc
;
4140 if (bpt
->type
!= bp_hardware_watchpoint
4141 && bpt
->type
!= bp_access_watchpoint
)
4144 if (!breakpoint_enabled (bpt
))
4147 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
4148 if (loc
->pspace
->aspace
== aspace
&& loc
->inserted
)
4152 /* Check for intersection. */
4153 l
= std::max
<CORE_ADDR
> (loc
->address
, addr
);
4154 h
= std::min
<CORE_ADDR
> (loc
->address
+ loc
->length
, addr
+ len
);
4163 /* bpstat stuff. External routines' interfaces are documented
4167 is_catchpoint (struct breakpoint
*ep
)
4169 return (ep
->type
== bp_catchpoint
);
4172 /* Frees any storage that is part of a bpstat. Does not walk the
4175 bpstats::~bpstats ()
4177 if (bp_location_at
!= NULL
)
4178 decref_bp_location (&bp_location_at
);
4181 /* Clear a bpstat so that it says we are not at any breakpoint.
4182 Also free any storage that is part of a bpstat. */
4185 bpstat_clear (bpstat
*bsp
)
4202 bpstats::bpstats (const bpstats
&other
)
4204 bp_location_at (other
.bp_location_at
),
4205 breakpoint_at (other
.breakpoint_at
),
4206 commands (other
.commands
),
4207 print (other
.print
),
4209 print_it (other
.print_it
)
4211 if (other
.old_val
!= NULL
)
4212 old_val
= release_value (value_copy (other
.old_val
.get ()));
4213 incref_bp_location (bp_location_at
);
4216 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
4217 is part of the bpstat is copied as well. */
4220 bpstat_copy (bpstat bs
)
4224 bpstat retval
= NULL
;
4229 for (; bs
!= NULL
; bs
= bs
->next
)
4231 tmp
= new bpstats (*bs
);
4234 /* This is the first thing in the chain. */
4244 /* Find the bpstat associated with this breakpoint. */
4247 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
4252 for (; bsp
!= NULL
; bsp
= bsp
->next
)
4254 if (bsp
->breakpoint_at
== breakpoint
)
4260 /* See breakpoint.h. */
4263 bpstat_explains_signal (bpstat bsp
, enum gdb_signal sig
)
4265 for (; bsp
!= NULL
; bsp
= bsp
->next
)
4267 if (bsp
->breakpoint_at
== NULL
)
4269 /* A moribund location can never explain a signal other than
4271 if (sig
== GDB_SIGNAL_TRAP
)
4276 if (bsp
->breakpoint_at
->ops
->explains_signal (bsp
->breakpoint_at
,
4285 /* Put in *NUM the breakpoint number of the first breakpoint we are
4286 stopped at. *BSP upon return is a bpstat which points to the
4287 remaining breakpoints stopped at (but which is not guaranteed to be
4288 good for anything but further calls to bpstat_num).
4290 Return 0 if passed a bpstat which does not indicate any breakpoints.
4291 Return -1 if stopped at a breakpoint that has been deleted since
4293 Return 1 otherwise. */
4296 bpstat_num (bpstat
*bsp
, int *num
)
4298 struct breakpoint
*b
;
4301 return 0; /* No more breakpoint values */
4303 /* We assume we'll never have several bpstats that correspond to a
4304 single breakpoint -- otherwise, this function might return the
4305 same number more than once and this will look ugly. */
4306 b
= (*bsp
)->breakpoint_at
;
4307 *bsp
= (*bsp
)->next
;
4309 return -1; /* breakpoint that's been deleted since */
4311 *num
= b
->number
; /* We have its number */
4315 /* See breakpoint.h. */
4318 bpstat_clear_actions (void)
4322 if (inferior_ptid
== null_ptid
)
4325 thread_info
*tp
= inferior_thread ();
4326 for (bs
= tp
->control
.stop_bpstat
; bs
!= NULL
; bs
= bs
->next
)
4328 bs
->commands
= NULL
;
4329 bs
->old_val
.reset (nullptr);
4333 /* Called when a command is about to proceed the inferior. */
4336 breakpoint_about_to_proceed (void)
4338 if (inferior_ptid
!= null_ptid
)
4340 struct thread_info
*tp
= inferior_thread ();
4342 /* Allow inferior function calls in breakpoint commands to not
4343 interrupt the command list. When the call finishes
4344 successfully, the inferior will be standing at the same
4345 breakpoint as if nothing happened. */
4346 if (tp
->control
.in_infcall
)
4350 breakpoint_proceeded
= 1;
4353 /* Return non-zero iff CMD as the first line of a command sequence is `silent'
4354 or its equivalent. */
4357 command_line_is_silent (struct command_line
*cmd
)
4359 return cmd
&& (strcmp ("silent", cmd
->line
) == 0);
4362 /* Execute all the commands associated with all the breakpoints at
4363 this location. Any of these commands could cause the process to
4364 proceed beyond this point, etc. We look out for such changes by
4365 checking the global "breakpoint_proceeded" after each command.
4367 Returns true if a breakpoint command resumed the inferior. In that
4368 case, it is the caller's responsibility to recall it again with the
4369 bpstat of the current thread. */
4372 bpstat_do_actions_1 (bpstat
*bsp
)
4377 /* Avoid endless recursion if a `source' command is contained
4379 if (executing_breakpoint_commands
)
4382 scoped_restore save_executing
4383 = make_scoped_restore (&executing_breakpoint_commands
, 1);
4385 scoped_restore preventer
= prevent_dont_repeat ();
4387 /* This pointer will iterate over the list of bpstat's. */
4390 breakpoint_proceeded
= 0;
4391 for (; bs
!= NULL
; bs
= bs
->next
)
4393 struct command_line
*cmd
= NULL
;
4395 /* Take ownership of the BSP's command tree, if it has one.
4397 The command tree could legitimately contain commands like
4398 'step' and 'next', which call clear_proceed_status, which
4399 frees stop_bpstat's command tree. To make sure this doesn't
4400 free the tree we're executing out from under us, we need to
4401 take ownership of the tree ourselves. Since a given bpstat's
4402 commands are only executed once, we don't need to copy it; we
4403 can clear the pointer in the bpstat, and make sure we free
4404 the tree when we're done. */
4405 counted_command_line ccmd
= bs
->commands
;
4406 bs
->commands
= NULL
;
4409 if (command_line_is_silent (cmd
))
4411 /* The action has been already done by bpstat_stop_status. */
4417 execute_control_command (cmd
);
4419 if (breakpoint_proceeded
)
4425 if (breakpoint_proceeded
)
4427 if (current_ui
->async
)
4428 /* If we are in async mode, then the target might be still
4429 running, not stopped at any breakpoint, so nothing for
4430 us to do here -- just return to the event loop. */
4433 /* In sync mode, when execute_control_command returns
4434 we're already standing on the next breakpoint.
4435 Breakpoint commands for that stop were not run, since
4436 execute_command does not run breakpoint commands --
4437 only command_line_handler does, but that one is not
4438 involved in execution of breakpoint commands. So, we
4439 can now execute breakpoint commands. It should be
4440 noted that making execute_command do bpstat actions is
4441 not an option -- in this case we'll have recursive
4442 invocation of bpstat for each breakpoint with a
4443 command, and can easily blow up GDB stack. Instead, we
4444 return true, which will trigger the caller to recall us
4445 with the new stop_bpstat. */
4453 /* Helper for bpstat_do_actions. Get the current thread, if there's
4454 one, is alive and has execution. Return NULL otherwise. */
4456 static thread_info
*
4457 get_bpstat_thread ()
4459 if (inferior_ptid
== null_ptid
|| !target_has_execution
)
4462 thread_info
*tp
= inferior_thread ();
4463 if (tp
->state
== THREAD_EXITED
|| tp
->executing
)
4469 bpstat_do_actions (void)
4471 auto cleanup_if_error
= make_scope_exit (bpstat_clear_actions
);
4474 /* Do any commands attached to breakpoint we are stopped at. */
4475 while ((tp
= get_bpstat_thread ()) != NULL
)
4477 /* Since in sync mode, bpstat_do_actions may resume the
4478 inferior, and only return when it is stopped at the next
4479 breakpoint, we keep doing breakpoint actions until it returns
4480 false to indicate the inferior was not resumed. */
4481 if (!bpstat_do_actions_1 (&tp
->control
.stop_bpstat
))
4485 cleanup_if_error
.release ();
4488 /* Print out the (old or new) value associated with a watchpoint. */
4491 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
4494 fprintf_unfiltered (stream
, _("<unreadable>"));
4497 struct value_print_options opts
;
4498 get_user_print_options (&opts
);
4499 value_print (val
, stream
, &opts
);
4503 /* Print the "Thread ID hit" part of "Thread ID hit Breakpoint N" if
4504 debugging multiple threads. */
4507 maybe_print_thread_hit_breakpoint (struct ui_out
*uiout
)
4509 if (uiout
->is_mi_like_p ())
4514 if (show_thread_that_caused_stop ())
4517 struct thread_info
*thr
= inferior_thread ();
4519 uiout
->text ("Thread ");
4520 uiout
->field_fmt ("thread-id", "%s", print_thread_id (thr
));
4522 name
= thr
->name
!= NULL
? thr
->name
: target_thread_name (thr
);
4525 uiout
->text (" \"");
4526 uiout
->field_fmt ("name", "%s", name
);
4530 uiout
->text (" hit ");
4534 /* Generic routine for printing messages indicating why we
4535 stopped. The behavior of this function depends on the value
4536 'print_it' in the bpstat structure. Under some circumstances we
4537 may decide not to print anything here and delegate the task to
4540 static enum print_stop_action
4541 print_bp_stop_message (bpstat bs
)
4543 switch (bs
->print_it
)
4546 /* Nothing should be printed for this bpstat entry. */
4547 return PRINT_UNKNOWN
;
4551 /* We still want to print the frame, but we already printed the
4552 relevant messages. */
4553 return PRINT_SRC_AND_LOC
;
4556 case print_it_normal
:
4558 struct breakpoint
*b
= bs
->breakpoint_at
;
4560 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
4561 which has since been deleted. */
4563 return PRINT_UNKNOWN
;
4565 /* Normal case. Call the breakpoint's print_it method. */
4566 return b
->ops
->print_it (bs
);
4571 internal_error (__FILE__
, __LINE__
,
4572 _("print_bp_stop_message: unrecognized enum value"));
4577 /* A helper function that prints a shared library stopped event. */
4580 print_solib_event (int is_catchpoint
)
4582 bool any_deleted
= !current_program_space
->deleted_solibs
.empty ();
4583 bool any_added
= !current_program_space
->added_solibs
.empty ();
4587 if (any_added
|| any_deleted
)
4588 current_uiout
->text (_("Stopped due to shared library event:\n"));
4590 current_uiout
->text (_("Stopped due to shared library event (no "
4591 "libraries added or removed)\n"));
4594 if (current_uiout
->is_mi_like_p ())
4595 current_uiout
->field_string ("reason",
4596 async_reason_lookup (EXEC_ASYNC_SOLIB_EVENT
));
4600 current_uiout
->text (_(" Inferior unloaded "));
4601 ui_out_emit_list
list_emitter (current_uiout
, "removed");
4602 for (int ix
= 0; ix
< current_program_space
->deleted_solibs
.size (); ix
++)
4604 const std::string
&name
= current_program_space
->deleted_solibs
[ix
];
4607 current_uiout
->text (" ");
4608 current_uiout
->field_string ("library", name
);
4609 current_uiout
->text ("\n");
4615 current_uiout
->text (_(" Inferior loaded "));
4616 ui_out_emit_list
list_emitter (current_uiout
, "added");
4618 for (so_list
*iter
: current_program_space
->added_solibs
)
4621 current_uiout
->text (" ");
4623 current_uiout
->field_string ("library", iter
->so_name
);
4624 current_uiout
->text ("\n");
4629 /* Print a message indicating what happened. This is called from
4630 normal_stop(). The input to this routine is the head of the bpstat
4631 list - a list of the eventpoints that caused this stop. KIND is
4632 the target_waitkind for the stopping event. This
4633 routine calls the generic print routine for printing a message
4634 about reasons for stopping. This will print (for example) the
4635 "Breakpoint n," part of the output. The return value of this
4638 PRINT_UNKNOWN: Means we printed nothing.
4639 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
4640 code to print the location. An example is
4641 "Breakpoint 1, " which should be followed by
4643 PRINT_SRC_ONLY: Means we printed something, but there is no need
4644 to also print the location part of the message.
4645 An example is the catch/throw messages, which
4646 don't require a location appended to the end.
4647 PRINT_NOTHING: We have done some printing and we don't need any
4648 further info to be printed. */
4650 enum print_stop_action
4651 bpstat_print (bpstat bs
, int kind
)
4653 enum print_stop_action val
;
4655 /* Maybe another breakpoint in the chain caused us to stop.
4656 (Currently all watchpoints go on the bpstat whether hit or not.
4657 That probably could (should) be changed, provided care is taken
4658 with respect to bpstat_explains_signal). */
4659 for (; bs
; bs
= bs
->next
)
4661 val
= print_bp_stop_message (bs
);
4662 if (val
== PRINT_SRC_ONLY
4663 || val
== PRINT_SRC_AND_LOC
4664 || val
== PRINT_NOTHING
)
4668 /* If we had hit a shared library event breakpoint,
4669 print_bp_stop_message would print out this message. If we hit an
4670 OS-level shared library event, do the same thing. */
4671 if (kind
== TARGET_WAITKIND_LOADED
)
4673 print_solib_event (0);
4674 return PRINT_NOTHING
;
4677 /* We reached the end of the chain, or we got a null BS to start
4678 with and nothing was printed. */
4679 return PRINT_UNKNOWN
;
4682 /* Evaluate the boolean expression EXP and return the result. */
4685 breakpoint_cond_eval (expression
*exp
)
4687 struct value
*mark
= value_mark ();
4688 bool res
= value_true (evaluate_expression (exp
));
4690 value_free_to_mark (mark
);
4694 /* Allocate a new bpstat. Link it to the FIFO list by BS_LINK_POINTER. */
4696 bpstats::bpstats (struct bp_location
*bl
, bpstat
**bs_link_pointer
)
4698 bp_location_at (bl
),
4699 breakpoint_at (bl
->owner
),
4703 print_it (print_it_normal
)
4705 incref_bp_location (bl
);
4706 **bs_link_pointer
= this;
4707 *bs_link_pointer
= &next
;
4712 bp_location_at (NULL
),
4713 breakpoint_at (NULL
),
4717 print_it (print_it_normal
)
4721 /* The target has stopped with waitstatus WS. Check if any hardware
4722 watchpoints have triggered, according to the target. */
4725 watchpoints_triggered (struct target_waitstatus
*ws
)
4727 bool stopped_by_watchpoint
= target_stopped_by_watchpoint ();
4729 struct breakpoint
*b
;
4731 if (!stopped_by_watchpoint
)
4733 /* We were not stopped by a watchpoint. Mark all watchpoints
4734 as not triggered. */
4736 if (is_hardware_watchpoint (b
))
4738 struct watchpoint
*w
= (struct watchpoint
*) b
;
4740 w
->watchpoint_triggered
= watch_triggered_no
;
4746 if (!target_stopped_data_address (current_top_target (), &addr
))
4748 /* We were stopped by a watchpoint, but we don't know where.
4749 Mark all watchpoints as unknown. */
4751 if (is_hardware_watchpoint (b
))
4753 struct watchpoint
*w
= (struct watchpoint
*) b
;
4755 w
->watchpoint_triggered
= watch_triggered_unknown
;
4761 /* The target could report the data address. Mark watchpoints
4762 affected by this data address as triggered, and all others as not
4766 if (is_hardware_watchpoint (b
))
4768 struct watchpoint
*w
= (struct watchpoint
*) b
;
4769 struct bp_location
*loc
;
4771 w
->watchpoint_triggered
= watch_triggered_no
;
4772 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
4774 if (is_masked_watchpoint (b
))
4776 CORE_ADDR newaddr
= addr
& w
->hw_wp_mask
;
4777 CORE_ADDR start
= loc
->address
& w
->hw_wp_mask
;
4779 if (newaddr
== start
)
4781 w
->watchpoint_triggered
= watch_triggered_yes
;
4785 /* Exact match not required. Within range is sufficient. */
4786 else if (target_watchpoint_addr_within_range (current_top_target (),
4790 w
->watchpoint_triggered
= watch_triggered_yes
;
4799 /* Possible return values for watchpoint_check. */
4800 enum wp_check_result
4802 /* The watchpoint has been deleted. */
4805 /* The value has changed. */
4806 WP_VALUE_CHANGED
= 2,
4808 /* The value has not changed. */
4809 WP_VALUE_NOT_CHANGED
= 3,
4811 /* Ignore this watchpoint, no matter if the value changed or not. */
4815 #define BP_TEMPFLAG 1
4816 #define BP_HARDWAREFLAG 2
4818 /* Evaluate watchpoint condition expression and check if its value
4821 static wp_check_result
4822 watchpoint_check (bpstat bs
)
4824 struct watchpoint
*b
;
4825 struct frame_info
*fr
;
4826 int within_current_scope
;
4828 /* BS is built from an existing struct breakpoint. */
4829 gdb_assert (bs
->breakpoint_at
!= NULL
);
4830 b
= (struct watchpoint
*) bs
->breakpoint_at
;
4832 /* If this is a local watchpoint, we only want to check if the
4833 watchpoint frame is in scope if the current thread is the thread
4834 that was used to create the watchpoint. */
4835 if (!watchpoint_in_thread_scope (b
))
4838 if (b
->exp_valid_block
== NULL
)
4839 within_current_scope
= 1;
4842 struct frame_info
*frame
= get_current_frame ();
4843 struct gdbarch
*frame_arch
= get_frame_arch (frame
);
4844 CORE_ADDR frame_pc
= get_frame_pc (frame
);
4846 /* stack_frame_destroyed_p() returns a non-zero value if we're
4847 still in the function but the stack frame has already been
4848 invalidated. Since we can't rely on the values of local
4849 variables after the stack has been destroyed, we are treating
4850 the watchpoint in that state as `not changed' without further
4851 checking. Don't mark watchpoints as changed if the current
4852 frame is in an epilogue - even if they are in some other
4853 frame, our view of the stack is likely to be wrong and
4854 frame_find_by_id could error out. */
4855 if (gdbarch_stack_frame_destroyed_p (frame_arch
, frame_pc
))
4858 fr
= frame_find_by_id (b
->watchpoint_frame
);
4859 within_current_scope
= (fr
!= NULL
);
4861 /* If we've gotten confused in the unwinder, we might have
4862 returned a frame that can't describe this variable. */
4863 if (within_current_scope
)
4865 struct symbol
*function
;
4867 function
= get_frame_function (fr
);
4868 if (function
== NULL
4869 || !contained_in (b
->exp_valid_block
,
4870 SYMBOL_BLOCK_VALUE (function
)))
4871 within_current_scope
= 0;
4874 if (within_current_scope
)
4875 /* If we end up stopping, the current frame will get selected
4876 in normal_stop. So this call to select_frame won't affect
4881 if (within_current_scope
)
4883 /* We use value_{,free_to_}mark because it could be a *long*
4884 time before we return to the command level and call
4885 free_all_values. We can't call free_all_values because we
4886 might be in the middle of evaluating a function call. */
4890 struct value
*new_val
;
4892 if (is_masked_watchpoint (b
))
4893 /* Since we don't know the exact trigger address (from
4894 stopped_data_address), just tell the user we've triggered
4895 a mask watchpoint. */
4896 return WP_VALUE_CHANGED
;
4898 mark
= value_mark ();
4899 fetch_subexp_value (b
->exp
.get (), &pc
, &new_val
, NULL
, NULL
, 0);
4901 if (b
->val_bitsize
!= 0)
4902 new_val
= extract_bitfield_from_watchpoint_value (b
, new_val
);
4904 /* We use value_equal_contents instead of value_equal because
4905 the latter coerces an array to a pointer, thus comparing just
4906 the address of the array instead of its contents. This is
4907 not what we want. */
4908 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
4909 || (b
->val
!= NULL
&& !value_equal_contents (b
->val
.get (),
4912 bs
->old_val
= b
->val
;
4913 b
->val
= release_value (new_val
);
4915 if (new_val
!= NULL
)
4916 value_free_to_mark (mark
);
4917 return WP_VALUE_CHANGED
;
4921 /* Nothing changed. */
4922 value_free_to_mark (mark
);
4923 return WP_VALUE_NOT_CHANGED
;
4928 /* This seems like the only logical thing to do because
4929 if we temporarily ignored the watchpoint, then when
4930 we reenter the block in which it is valid it contains
4931 garbage (in the case of a function, it may have two
4932 garbage values, one before and one after the prologue).
4933 So we can't even detect the first assignment to it and
4934 watch after that (since the garbage may or may not equal
4935 the first value assigned). */
4936 /* We print all the stop information in
4937 breakpoint_ops->print_it, but in this case, by the time we
4938 call breakpoint_ops->print_it this bp will be deleted
4939 already. So we have no choice but print the information
4942 SWITCH_THRU_ALL_UIS ()
4944 struct ui_out
*uiout
= current_uiout
;
4946 if (uiout
->is_mi_like_p ())
4948 ("reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
4949 uiout
->text ("\nWatchpoint ");
4950 uiout
->field_int ("wpnum", b
->number
);
4951 uiout
->text (" deleted because the program has left the block in\n"
4952 "which its expression is valid.\n");
4955 /* Make sure the watchpoint's commands aren't executed. */
4957 watchpoint_del_at_next_stop (b
);
4963 /* Return true if it looks like target has stopped due to hitting
4964 breakpoint location BL. This function does not check if we should
4965 stop, only if BL explains the stop. */
4968 bpstat_check_location (const struct bp_location
*bl
,
4969 const address_space
*aspace
, CORE_ADDR bp_addr
,
4970 const struct target_waitstatus
*ws
)
4972 struct breakpoint
*b
= bl
->owner
;
4974 /* BL is from an existing breakpoint. */
4975 gdb_assert (b
!= NULL
);
4977 return b
->ops
->breakpoint_hit (bl
, aspace
, bp_addr
, ws
);
4980 /* Determine if the watched values have actually changed, and we
4981 should stop. If not, set BS->stop to 0. */
4984 bpstat_check_watchpoint (bpstat bs
)
4986 const struct bp_location
*bl
;
4987 struct watchpoint
*b
;
4989 /* BS is built for existing struct breakpoint. */
4990 bl
= bs
->bp_location_at
;
4991 gdb_assert (bl
!= NULL
);
4992 b
= (struct watchpoint
*) bs
->breakpoint_at
;
4993 gdb_assert (b
!= NULL
);
4996 int must_check_value
= 0;
4998 if (b
->type
== bp_watchpoint
)
4999 /* For a software watchpoint, we must always check the
5001 must_check_value
= 1;
5002 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
5003 /* We have a hardware watchpoint (read, write, or access)
5004 and the target earlier reported an address watched by
5006 must_check_value
= 1;
5007 else if (b
->watchpoint_triggered
== watch_triggered_unknown
5008 && b
->type
== bp_hardware_watchpoint
)
5009 /* We were stopped by a hardware watchpoint, but the target could
5010 not report the data address. We must check the watchpoint's
5011 value. Access and read watchpoints are out of luck; without
5012 a data address, we can't figure it out. */
5013 must_check_value
= 1;
5015 if (must_check_value
)
5021 e
= watchpoint_check (bs
);
5023 CATCH (ex
, RETURN_MASK_ALL
)
5025 exception_fprintf (gdb_stderr
, ex
,
5026 "Error evaluating expression "
5027 "for watchpoint %d\n",
5030 SWITCH_THRU_ALL_UIS ()
5032 printf_filtered (_("Watchpoint %d deleted.\n"),
5035 watchpoint_del_at_next_stop (b
);
5043 /* We've already printed what needs to be printed. */
5044 bs
->print_it
= print_it_done
;
5048 bs
->print_it
= print_it_noop
;
5051 case WP_VALUE_CHANGED
:
5052 if (b
->type
== bp_read_watchpoint
)
5054 /* There are two cases to consider here:
5056 1. We're watching the triggered memory for reads.
5057 In that case, trust the target, and always report
5058 the watchpoint hit to the user. Even though
5059 reads don't cause value changes, the value may
5060 have changed since the last time it was read, and
5061 since we're not trapping writes, we will not see
5062 those, and as such we should ignore our notion of
5065 2. We're watching the triggered memory for both
5066 reads and writes. There are two ways this may
5069 2.1. This is a target that can't break on data
5070 reads only, but can break on accesses (reads or
5071 writes), such as e.g., x86. We detect this case
5072 at the time we try to insert read watchpoints.
5074 2.2. Otherwise, the target supports read
5075 watchpoints, but, the user set an access or write
5076 watchpoint watching the same memory as this read
5079 If we're watching memory writes as well as reads,
5080 ignore watchpoint hits when we find that the
5081 value hasn't changed, as reads don't cause
5082 changes. This still gives false positives when
5083 the program writes the same value to memory as
5084 what there was already in memory (we will confuse
5085 it for a read), but it's much better than
5088 int other_write_watchpoint
= 0;
5090 if (bl
->watchpoint_type
== hw_read
)
5092 struct breakpoint
*other_b
;
5094 ALL_BREAKPOINTS (other_b
)
5095 if (other_b
->type
== bp_hardware_watchpoint
5096 || other_b
->type
== bp_access_watchpoint
)
5098 struct watchpoint
*other_w
=
5099 (struct watchpoint
*) other_b
;
5101 if (other_w
->watchpoint_triggered
5102 == watch_triggered_yes
)
5104 other_write_watchpoint
= 1;
5110 if (other_write_watchpoint
5111 || bl
->watchpoint_type
== hw_access
)
5113 /* We're watching the same memory for writes,
5114 and the value changed since the last time we
5115 updated it, so this trap must be for a write.
5117 bs
->print_it
= print_it_noop
;
5122 case WP_VALUE_NOT_CHANGED
:
5123 if (b
->type
== bp_hardware_watchpoint
5124 || b
->type
== bp_watchpoint
)
5126 /* Don't stop: write watchpoints shouldn't fire if
5127 the value hasn't changed. */
5128 bs
->print_it
= print_it_noop
;
5138 else /* must_check_value == 0 */
5140 /* This is a case where some watchpoint(s) triggered, but
5141 not at the address of this watchpoint, or else no
5142 watchpoint triggered after all. So don't print
5143 anything for this watchpoint. */
5144 bs
->print_it
= print_it_noop
;
5150 /* For breakpoints that are currently marked as telling gdb to stop,
5151 check conditions (condition proper, frame, thread and ignore count)
5152 of breakpoint referred to by BS. If we should not stop for this
5153 breakpoint, set BS->stop to 0. */
5156 bpstat_check_breakpoint_conditions (bpstat bs
, thread_info
*thread
)
5158 const struct bp_location
*bl
;
5159 struct breakpoint
*b
;
5161 bool condition_result
= true;
5162 struct expression
*cond
;
5164 gdb_assert (bs
->stop
);
5166 /* BS is built for existing struct breakpoint. */
5167 bl
= bs
->bp_location_at
;
5168 gdb_assert (bl
!= NULL
);
5169 b
= bs
->breakpoint_at
;
5170 gdb_assert (b
!= NULL
);
5172 /* Even if the target evaluated the condition on its end and notified GDB, we
5173 need to do so again since GDB does not know if we stopped due to a
5174 breakpoint or a single step breakpoint. */
5176 if (frame_id_p (b
->frame_id
)
5177 && !frame_id_eq (b
->frame_id
, get_stack_frame_id (get_current_frame ())))
5183 /* If this is a thread/task-specific breakpoint, don't waste cpu
5184 evaluating the condition if this isn't the specified
5186 if ((b
->thread
!= -1 && b
->thread
!= thread
->global_num
)
5187 || (b
->task
!= 0 && b
->task
!= ada_get_task_number (thread
)))
5193 /* Evaluate extension language breakpoints that have a "stop" method
5195 bs
->stop
= breakpoint_ext_lang_cond_says_stop (b
);
5197 if (is_watchpoint (b
))
5199 struct watchpoint
*w
= (struct watchpoint
*) b
;
5201 cond
= w
->cond_exp
.get ();
5204 cond
= bl
->cond
.get ();
5206 if (cond
&& b
->disposition
!= disp_del_at_next_stop
)
5208 int within_current_scope
= 1;
5209 struct watchpoint
* w
;
5211 /* We use value_mark and value_free_to_mark because it could
5212 be a long time before we return to the command level and
5213 call free_all_values. We can't call free_all_values
5214 because we might be in the middle of evaluating a
5216 struct value
*mark
= value_mark ();
5218 if (is_watchpoint (b
))
5219 w
= (struct watchpoint
*) b
;
5223 /* Need to select the frame, with all that implies so that
5224 the conditions will have the right context. Because we
5225 use the frame, we will not see an inlined function's
5226 variables when we arrive at a breakpoint at the start
5227 of the inlined function; the current frame will be the
5229 if (w
== NULL
|| w
->cond_exp_valid_block
== NULL
)
5230 select_frame (get_current_frame ());
5233 struct frame_info
*frame
;
5235 /* For local watchpoint expressions, which particular
5236 instance of a local is being watched matters, so we
5237 keep track of the frame to evaluate the expression
5238 in. To evaluate the condition however, it doesn't
5239 really matter which instantiation of the function
5240 where the condition makes sense triggers the
5241 watchpoint. This allows an expression like "watch
5242 global if q > 10" set in `func', catch writes to
5243 global on all threads that call `func', or catch
5244 writes on all recursive calls of `func' by a single
5245 thread. We simply always evaluate the condition in
5246 the innermost frame that's executing where it makes
5247 sense to evaluate the condition. It seems
5249 frame
= block_innermost_frame (w
->cond_exp_valid_block
);
5251 select_frame (frame
);
5253 within_current_scope
= 0;
5255 if (within_current_scope
)
5259 condition_result
= breakpoint_cond_eval (cond
);
5261 CATCH (ex
, RETURN_MASK_ALL
)
5263 exception_fprintf (gdb_stderr
, ex
,
5264 "Error in testing breakpoint condition:\n");
5270 warning (_("Watchpoint condition cannot be tested "
5271 "in the current scope"));
5272 /* If we failed to set the right context for this
5273 watchpoint, unconditionally report it. */
5275 /* FIXME-someday, should give breakpoint #. */
5276 value_free_to_mark (mark
);
5279 if (cond
&& !condition_result
)
5283 else if (b
->ignore_count
> 0)
5287 /* Increase the hit count even though we don't stop. */
5289 gdb::observers::breakpoint_modified
.notify (b
);
5293 /* Returns true if we need to track moribund locations of LOC's type
5294 on the current target. */
5297 need_moribund_for_location_type (struct bp_location
*loc
)
5299 return ((loc
->loc_type
== bp_loc_software_breakpoint
5300 && !target_supports_stopped_by_sw_breakpoint ())
5301 || (loc
->loc_type
== bp_loc_hardware_breakpoint
5302 && !target_supports_stopped_by_hw_breakpoint ()));
5305 /* See breakpoint.h. */
5308 build_bpstat_chain (const address_space
*aspace
, CORE_ADDR bp_addr
,
5309 const struct target_waitstatus
*ws
)
5311 struct breakpoint
*b
;
5312 bpstat bs_head
= NULL
, *bs_link
= &bs_head
;
5316 if (!breakpoint_enabled (b
))
5319 for (bp_location
*bl
= b
->loc
; bl
!= NULL
; bl
= bl
->next
)
5321 /* For hardware watchpoints, we look only at the first
5322 location. The watchpoint_check function will work on the
5323 entire expression, not the individual locations. For
5324 read watchpoints, the watchpoints_triggered function has
5325 checked all locations already. */
5326 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
5329 if (!bl
->enabled
|| bl
->shlib_disabled
)
5332 if (!bpstat_check_location (bl
, aspace
, bp_addr
, ws
))
5335 /* Come here if it's a watchpoint, or if the break address
5338 bpstat bs
= new bpstats (bl
, &bs_link
); /* Alloc a bpstat to
5341 /* Assume we stop. Should we find a watchpoint that is not
5342 actually triggered, or if the condition of the breakpoint
5343 evaluates as false, we'll reset 'stop' to 0. */
5347 /* If this is a scope breakpoint, mark the associated
5348 watchpoint as triggered so that we will handle the
5349 out-of-scope event. We'll get to the watchpoint next
5351 if (b
->type
== bp_watchpoint_scope
&& b
->related_breakpoint
!= b
)
5353 struct watchpoint
*w
= (struct watchpoint
*) b
->related_breakpoint
;
5355 w
->watchpoint_triggered
= watch_triggered_yes
;
5360 /* Check if a moribund breakpoint explains the stop. */
5361 if (!target_supports_stopped_by_sw_breakpoint ()
5362 || !target_supports_stopped_by_hw_breakpoint ())
5364 for (bp_location
*loc
: moribund_locations
)
5366 if (breakpoint_location_address_match (loc
, aspace
, bp_addr
)
5367 && need_moribund_for_location_type (loc
))
5369 bpstat bs
= new bpstats (loc
, &bs_link
);
5370 /* For hits of moribund locations, we should just proceed. */
5373 bs
->print_it
= print_it_noop
;
5381 /* See breakpoint.h. */
5384 bpstat_stop_status (const address_space
*aspace
,
5385 CORE_ADDR bp_addr
, thread_info
*thread
,
5386 const struct target_waitstatus
*ws
,
5389 struct breakpoint
*b
= NULL
;
5390 /* First item of allocated bpstat's. */
5391 bpstat bs_head
= stop_chain
;
5393 int need_remove_insert
;
5396 /* First, build the bpstat chain with locations that explain a
5397 target stop, while being careful to not set the target running,
5398 as that may invalidate locations (in particular watchpoint
5399 locations are recreated). Resuming will happen here with
5400 breakpoint conditions or watchpoint expressions that include
5401 inferior function calls. */
5402 if (bs_head
== NULL
)
5403 bs_head
= build_bpstat_chain (aspace
, bp_addr
, ws
);
5405 /* A bit of special processing for shlib breakpoints. We need to
5406 process solib loading here, so that the lists of loaded and
5407 unloaded libraries are correct before we handle "catch load" and
5409 for (bs
= bs_head
; bs
!= NULL
; bs
= bs
->next
)
5411 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->type
== bp_shlib_event
)
5413 handle_solib_event ();
5418 /* Now go through the locations that caused the target to stop, and
5419 check whether we're interested in reporting this stop to higher
5420 layers, or whether we should resume the target transparently. */
5424 for (bs
= bs_head
; bs
!= NULL
; bs
= bs
->next
)
5429 b
= bs
->breakpoint_at
;
5430 b
->ops
->check_status (bs
);
5433 bpstat_check_breakpoint_conditions (bs
, thread
);
5438 gdb::observers::breakpoint_modified
.notify (b
);
5440 /* We will stop here. */
5441 if (b
->disposition
== disp_disable
)
5443 --(b
->enable_count
);
5444 if (b
->enable_count
<= 0)
5445 b
->enable_state
= bp_disabled
;
5450 bs
->commands
= b
->commands
;
5451 if (command_line_is_silent (bs
->commands
5452 ? bs
->commands
.get () : NULL
))
5455 b
->ops
->after_condition_true (bs
);
5460 /* Print nothing for this entry if we don't stop or don't
5462 if (!bs
->stop
|| !bs
->print
)
5463 bs
->print_it
= print_it_noop
;
5466 /* If we aren't stopping, the value of some hardware watchpoint may
5467 not have changed, but the intermediate memory locations we are
5468 watching may have. Don't bother if we're stopping; this will get
5470 need_remove_insert
= 0;
5471 if (! bpstat_causes_stop (bs_head
))
5472 for (bs
= bs_head
; bs
!= NULL
; bs
= bs
->next
)
5474 && bs
->breakpoint_at
5475 && is_hardware_watchpoint (bs
->breakpoint_at
))
5477 struct watchpoint
*w
= (struct watchpoint
*) bs
->breakpoint_at
;
5479 update_watchpoint (w
, 0 /* don't reparse. */);
5480 need_remove_insert
= 1;
5483 if (need_remove_insert
)
5484 update_global_location_list (UGLL_MAY_INSERT
);
5485 else if (removed_any
)
5486 update_global_location_list (UGLL_DONT_INSERT
);
5492 handle_jit_event (void)
5494 struct frame_info
*frame
;
5495 struct gdbarch
*gdbarch
;
5498 fprintf_unfiltered (gdb_stdlog
, "handling bp_jit_event\n");
5500 /* Switch terminal for any messages produced by
5501 breakpoint_re_set. */
5502 target_terminal::ours_for_output ();
5504 frame
= get_current_frame ();
5505 gdbarch
= get_frame_arch (frame
);
5507 jit_event_handler (gdbarch
);
5509 target_terminal::inferior ();
5512 /* Prepare WHAT final decision for infrun. */
5514 /* Decide what infrun needs to do with this bpstat. */
5517 bpstat_what (bpstat bs_head
)
5519 struct bpstat_what retval
;
5522 retval
.main_action
= BPSTAT_WHAT_KEEP_CHECKING
;
5523 retval
.call_dummy
= STOP_NONE
;
5524 retval
.is_longjmp
= 0;
5526 for (bs
= bs_head
; bs
!= NULL
; bs
= bs
->next
)
5528 /* Extract this BS's action. After processing each BS, we check
5529 if its action overrides all we've seem so far. */
5530 enum bpstat_what_main_action this_action
= BPSTAT_WHAT_KEEP_CHECKING
;
5533 if (bs
->breakpoint_at
== NULL
)
5535 /* I suspect this can happen if it was a momentary
5536 breakpoint which has since been deleted. */
5540 bptype
= bs
->breakpoint_at
->type
;
5547 case bp_hardware_breakpoint
:
5548 case bp_single_step
:
5551 case bp_shlib_event
:
5555 this_action
= BPSTAT_WHAT_STOP_NOISY
;
5557 this_action
= BPSTAT_WHAT_STOP_SILENT
;
5560 this_action
= BPSTAT_WHAT_SINGLE
;
5563 case bp_hardware_watchpoint
:
5564 case bp_read_watchpoint
:
5565 case bp_access_watchpoint
:
5569 this_action
= BPSTAT_WHAT_STOP_NOISY
;
5571 this_action
= BPSTAT_WHAT_STOP_SILENT
;
5575 /* There was a watchpoint, but we're not stopping.
5576 This requires no further action. */
5580 case bp_longjmp_call_dummy
:
5584 this_action
= BPSTAT_WHAT_SET_LONGJMP_RESUME
;
5585 retval
.is_longjmp
= bptype
!= bp_exception
;
5588 this_action
= BPSTAT_WHAT_SINGLE
;
5590 case bp_longjmp_resume
:
5591 case bp_exception_resume
:
5594 this_action
= BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
;
5595 retval
.is_longjmp
= bptype
== bp_longjmp_resume
;
5598 this_action
= BPSTAT_WHAT_SINGLE
;
5600 case bp_step_resume
:
5602 this_action
= BPSTAT_WHAT_STEP_RESUME
;
5605 /* It is for the wrong frame. */
5606 this_action
= BPSTAT_WHAT_SINGLE
;
5609 case bp_hp_step_resume
:
5611 this_action
= BPSTAT_WHAT_HP_STEP_RESUME
;
5614 /* It is for the wrong frame. */
5615 this_action
= BPSTAT_WHAT_SINGLE
;
5618 case bp_watchpoint_scope
:
5619 case bp_thread_event
:
5620 case bp_overlay_event
:
5621 case bp_longjmp_master
:
5622 case bp_std_terminate_master
:
5623 case bp_exception_master
:
5624 this_action
= BPSTAT_WHAT_SINGLE
;
5630 this_action
= BPSTAT_WHAT_STOP_NOISY
;
5632 this_action
= BPSTAT_WHAT_STOP_SILENT
;
5636 /* There was a catchpoint, but we're not stopping.
5637 This requires no further action. */
5641 this_action
= BPSTAT_WHAT_SINGLE
;
5644 /* Make sure the action is stop (silent or noisy),
5645 so infrun.c pops the dummy frame. */
5646 retval
.call_dummy
= STOP_STACK_DUMMY
;
5647 this_action
= BPSTAT_WHAT_STOP_SILENT
;
5649 case bp_std_terminate
:
5650 /* Make sure the action is stop (silent or noisy),
5651 so infrun.c pops the dummy frame. */
5652 retval
.call_dummy
= STOP_STD_TERMINATE
;
5653 this_action
= BPSTAT_WHAT_STOP_SILENT
;
5656 case bp_fast_tracepoint
:
5657 case bp_static_tracepoint
:
5658 /* Tracepoint hits should not be reported back to GDB, and
5659 if one got through somehow, it should have been filtered
5661 internal_error (__FILE__
, __LINE__
,
5662 _("bpstat_what: tracepoint encountered"));
5664 case bp_gnu_ifunc_resolver
:
5665 /* Step over it (and insert bp_gnu_ifunc_resolver_return). */
5666 this_action
= BPSTAT_WHAT_SINGLE
;
5668 case bp_gnu_ifunc_resolver_return
:
5669 /* The breakpoint will be removed, execution will restart from the
5670 PC of the former breakpoint. */
5671 this_action
= BPSTAT_WHAT_KEEP_CHECKING
;
5676 this_action
= BPSTAT_WHAT_STOP_SILENT
;
5678 this_action
= BPSTAT_WHAT_SINGLE
;
5682 internal_error (__FILE__
, __LINE__
,
5683 _("bpstat_what: unhandled bptype %d"), (int) bptype
);
5686 retval
.main_action
= std::max (retval
.main_action
, this_action
);
5693 bpstat_run_callbacks (bpstat bs_head
)
5697 for (bs
= bs_head
; bs
!= NULL
; bs
= bs
->next
)
5699 struct breakpoint
*b
= bs
->breakpoint_at
;
5706 handle_jit_event ();
5708 case bp_gnu_ifunc_resolver
:
5709 gnu_ifunc_resolver_stop (b
);
5711 case bp_gnu_ifunc_resolver_return
:
5712 gnu_ifunc_resolver_return_stop (b
);
5718 /* Nonzero if we should step constantly (e.g. watchpoints on machines
5719 without hardware support). This isn't related to a specific bpstat,
5720 just to things like whether watchpoints are set. */
5723 bpstat_should_step (void)
5725 struct breakpoint
*b
;
5728 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
&& b
->loc
!= NULL
)
5734 bpstat_causes_stop (bpstat bs
)
5736 for (; bs
!= NULL
; bs
= bs
->next
)
5745 /* Compute a string of spaces suitable to indent the next line
5746 so it starts at the position corresponding to the table column
5747 named COL_NAME in the currently active table of UIOUT. */
5750 wrap_indent_at_field (struct ui_out
*uiout
, const char *col_name
)
5752 static char wrap_indent
[80];
5753 int i
, total_width
, width
, align
;
5757 for (i
= 1; uiout
->query_table_field (i
, &width
, &align
, &text
); i
++)
5759 if (strcmp (text
, col_name
) == 0)
5761 gdb_assert (total_width
< sizeof wrap_indent
);
5762 memset (wrap_indent
, ' ', total_width
);
5763 wrap_indent
[total_width
] = 0;
5768 total_width
+= width
+ 1;
5774 /* Determine if the locations of this breakpoint will have their conditions
5775 evaluated by the target, host or a mix of both. Returns the following:
5777 "host": Host evals condition.
5778 "host or target": Host or Target evals condition.
5779 "target": Target evals condition.
5783 bp_condition_evaluator (struct breakpoint
*b
)
5785 struct bp_location
*bl
;
5786 char host_evals
= 0;
5787 char target_evals
= 0;
5792 if (!is_breakpoint (b
))
5795 if (gdb_evaluates_breakpoint_condition_p ()
5796 || !target_supports_evaluation_of_breakpoint_conditions ())
5797 return condition_evaluation_host
;
5799 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
5801 if (bl
->cond_bytecode
)
5807 if (host_evals
&& target_evals
)
5808 return condition_evaluation_both
;
5809 else if (target_evals
)
5810 return condition_evaluation_target
;
5812 return condition_evaluation_host
;
5815 /* Determine the breakpoint location's condition evaluator. This is
5816 similar to bp_condition_evaluator, but for locations. */
5819 bp_location_condition_evaluator (struct bp_location
*bl
)
5821 if (bl
&& !is_breakpoint (bl
->owner
))
5824 if (gdb_evaluates_breakpoint_condition_p ()
5825 || !target_supports_evaluation_of_breakpoint_conditions ())
5826 return condition_evaluation_host
;
5828 if (bl
&& bl
->cond_bytecode
)
5829 return condition_evaluation_target
;
5831 return condition_evaluation_host
;
5834 /* Print the LOC location out of the list of B->LOC locations. */
5837 print_breakpoint_location (struct breakpoint
*b
,
5838 struct bp_location
*loc
)
5840 struct ui_out
*uiout
= current_uiout
;
5842 scoped_restore_current_program_space restore_pspace
;
5844 if (loc
!= NULL
&& loc
->shlib_disabled
)
5848 set_current_program_space (loc
->pspace
);
5850 if (b
->display_canonical
)
5851 uiout
->field_string ("what", event_location_to_string (b
->location
.get ()));
5852 else if (loc
&& loc
->symtab
)
5854 const struct symbol
*sym
= loc
->symbol
;
5858 uiout
->text ("in ");
5859 uiout
->field_string ("func", SYMBOL_PRINT_NAME (sym
),
5860 ui_out_style_kind::FUNCTION
);
5862 uiout
->wrap_hint (wrap_indent_at_field (uiout
, "what"));
5863 uiout
->text ("at ");
5865 uiout
->field_string ("file",
5866 symtab_to_filename_for_display (loc
->symtab
),
5867 ui_out_style_kind::FILE);
5870 if (uiout
->is_mi_like_p ())
5871 uiout
->field_string ("fullname", symtab_to_fullname (loc
->symtab
));
5873 uiout
->field_int ("line", loc
->line_number
);
5879 print_address_symbolic (loc
->gdbarch
, loc
->address
, &stb
,
5881 uiout
->field_stream ("at", stb
);
5885 uiout
->field_string ("pending",
5886 event_location_to_string (b
->location
.get ()));
5887 /* If extra_string is available, it could be holding a condition
5888 or dprintf arguments. In either case, make sure it is printed,
5889 too, but only for non-MI streams. */
5890 if (!uiout
->is_mi_like_p () && b
->extra_string
!= NULL
)
5892 if (b
->type
== bp_dprintf
)
5896 uiout
->text (b
->extra_string
);
5900 if (loc
&& is_breakpoint (b
)
5901 && breakpoint_condition_evaluation_mode () == condition_evaluation_target
5902 && bp_condition_evaluator (b
) == condition_evaluation_both
)
5905 uiout
->field_string ("evaluated-by",
5906 bp_location_condition_evaluator (loc
));
5912 bptype_string (enum bptype type
)
5914 struct ep_type_description
5917 const char *description
;
5919 static struct ep_type_description bptypes
[] =
5921 {bp_none
, "?deleted?"},
5922 {bp_breakpoint
, "breakpoint"},
5923 {bp_hardware_breakpoint
, "hw breakpoint"},
5924 {bp_single_step
, "sw single-step"},
5925 {bp_until
, "until"},
5926 {bp_finish
, "finish"},
5927 {bp_watchpoint
, "watchpoint"},
5928 {bp_hardware_watchpoint
, "hw watchpoint"},
5929 {bp_read_watchpoint
, "read watchpoint"},
5930 {bp_access_watchpoint
, "acc watchpoint"},
5931 {bp_longjmp
, "longjmp"},
5932 {bp_longjmp_resume
, "longjmp resume"},
5933 {bp_longjmp_call_dummy
, "longjmp for call dummy"},
5934 {bp_exception
, "exception"},
5935 {bp_exception_resume
, "exception resume"},
5936 {bp_step_resume
, "step resume"},
5937 {bp_hp_step_resume
, "high-priority step resume"},
5938 {bp_watchpoint_scope
, "watchpoint scope"},
5939 {bp_call_dummy
, "call dummy"},
5940 {bp_std_terminate
, "std::terminate"},
5941 {bp_shlib_event
, "shlib events"},
5942 {bp_thread_event
, "thread events"},
5943 {bp_overlay_event
, "overlay events"},
5944 {bp_longjmp_master
, "longjmp master"},
5945 {bp_std_terminate_master
, "std::terminate master"},
5946 {bp_exception_master
, "exception master"},
5947 {bp_catchpoint
, "catchpoint"},
5948 {bp_tracepoint
, "tracepoint"},
5949 {bp_fast_tracepoint
, "fast tracepoint"},
5950 {bp_static_tracepoint
, "static tracepoint"},
5951 {bp_dprintf
, "dprintf"},
5952 {bp_jit_event
, "jit events"},
5953 {bp_gnu_ifunc_resolver
, "STT_GNU_IFUNC resolver"},
5954 {bp_gnu_ifunc_resolver_return
, "STT_GNU_IFUNC resolver return"},
5957 if (((int) type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
5958 || ((int) type
!= bptypes
[(int) type
].type
))
5959 internal_error (__FILE__
, __LINE__
,
5960 _("bptypes table does not describe type #%d."),
5963 return bptypes
[(int) type
].description
;
5966 /* For MI, output a field named 'thread-groups' with a list as the value.
5967 For CLI, prefix the list with the string 'inf'. */
5970 output_thread_groups (struct ui_out
*uiout
,
5971 const char *field_name
,
5972 const std::vector
<int> &inf_nums
,
5975 int is_mi
= uiout
->is_mi_like_p ();
5977 /* For backward compatibility, don't display inferiors in CLI unless
5978 there are several. Always display them for MI. */
5979 if (!is_mi
&& mi_only
)
5982 ui_out_emit_list
list_emitter (uiout
, field_name
);
5984 for (size_t i
= 0; i
< inf_nums
.size (); i
++)
5990 xsnprintf (mi_group
, sizeof (mi_group
), "i%d", inf_nums
[i
]);
5991 uiout
->field_string (NULL
, mi_group
);
5996 uiout
->text (" inf ");
6000 uiout
->text (plongest (inf_nums
[i
]));
6005 /* Print B to gdb_stdout. */
6008 print_one_breakpoint_location (struct breakpoint
*b
,
6009 struct bp_location
*loc
,
6011 struct bp_location
**last_loc
,
6014 struct command_line
*l
;
6015 static char bpenables
[] = "nynny";
6017 struct ui_out
*uiout
= current_uiout
;
6018 int header_of_multiple
= 0;
6019 int part_of_multiple
= (loc
!= NULL
);
6020 struct value_print_options opts
;
6022 get_user_print_options (&opts
);
6024 gdb_assert (!loc
|| loc_number
!= 0);
6025 /* See comment in print_one_breakpoint concerning treatment of
6026 breakpoints with single disabled location. */
6029 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
6030 header_of_multiple
= 1;
6038 if (part_of_multiple
)
6039 uiout
->field_fmt ("number", "%d.%d", b
->number
, loc_number
);
6041 uiout
->field_int ("number", b
->number
);
6045 if (part_of_multiple
)
6046 uiout
->field_skip ("type");
6048 uiout
->field_string ("type", bptype_string (b
->type
));
6052 if (part_of_multiple
)
6053 uiout
->field_skip ("disp");
6055 uiout
->field_string ("disp", bpdisp_text (b
->disposition
));
6059 if (part_of_multiple
)
6060 uiout
->field_string ("enabled", loc
->enabled
? "y" : "n");
6062 uiout
->field_fmt ("enabled", "%c", bpenables
[(int) b
->enable_state
]);
6065 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
6067 /* Although the print_one can possibly print all locations,
6068 calling it here is not likely to get any nice result. So,
6069 make sure there's just one location. */
6070 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
6071 b
->ops
->print_one (b
, last_loc
);
6077 internal_error (__FILE__
, __LINE__
,
6078 _("print_one_breakpoint: bp_none encountered\n"));
6082 case bp_hardware_watchpoint
:
6083 case bp_read_watchpoint
:
6084 case bp_access_watchpoint
:
6086 struct watchpoint
*w
= (struct watchpoint
*) b
;
6088 /* Field 4, the address, is omitted (which makes the columns
6089 not line up too nicely with the headers, but the effect
6090 is relatively readable). */
6091 if (opts
.addressprint
)
6092 uiout
->field_skip ("addr");
6094 uiout
->field_string ("what", w
->exp_string
);
6099 case bp_hardware_breakpoint
:
6100 case bp_single_step
:
6104 case bp_longjmp_resume
:
6105 case bp_longjmp_call_dummy
:
6107 case bp_exception_resume
:
6108 case bp_step_resume
:
6109 case bp_hp_step_resume
:
6110 case bp_watchpoint_scope
:
6112 case bp_std_terminate
:
6113 case bp_shlib_event
:
6114 case bp_thread_event
:
6115 case bp_overlay_event
:
6116 case bp_longjmp_master
:
6117 case bp_std_terminate_master
:
6118 case bp_exception_master
:
6120 case bp_fast_tracepoint
:
6121 case bp_static_tracepoint
:
6124 case bp_gnu_ifunc_resolver
:
6125 case bp_gnu_ifunc_resolver_return
:
6126 if (opts
.addressprint
)
6129 if (header_of_multiple
)
6130 uiout
->field_string ("addr", "<MULTIPLE>");
6131 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
6132 uiout
->field_string ("addr", "<PENDING>");
6134 uiout
->field_core_addr ("addr",
6135 loc
->gdbarch
, loc
->address
);
6138 if (!header_of_multiple
)
6139 print_breakpoint_location (b
, loc
);
6146 if (loc
!= NULL
&& !header_of_multiple
)
6148 std::vector
<int> inf_nums
;
6151 for (inferior
*inf
: all_inferiors ())
6153 if (inf
->pspace
== loc
->pspace
)
6154 inf_nums
.push_back (inf
->num
);
6157 /* For backward compatibility, don't display inferiors in CLI unless
6158 there are several. Always display for MI. */
6160 || (!gdbarch_has_global_breakpoints (target_gdbarch ())
6161 && (number_of_program_spaces () > 1
6162 || number_of_inferiors () > 1)
6163 /* LOC is for existing B, it cannot be in
6164 moribund_locations and thus having NULL OWNER. */
6165 && loc
->owner
->type
!= bp_catchpoint
))
6167 output_thread_groups (uiout
, "thread-groups", inf_nums
, mi_only
);
6170 if (!part_of_multiple
)
6172 if (b
->thread
!= -1)
6174 /* FIXME: This seems to be redundant and lost here; see the
6175 "stop only in" line a little further down. */
6176 uiout
->text (" thread ");
6177 uiout
->field_int ("thread", b
->thread
);
6179 else if (b
->task
!= 0)
6181 uiout
->text (" task ");
6182 uiout
->field_int ("task", b
->task
);
6188 if (!part_of_multiple
)
6189 b
->ops
->print_one_detail (b
, uiout
);
6191 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
6194 uiout
->text ("\tstop only in stack frame at ");
6195 /* FIXME: cagney/2002-12-01: Shouldn't be poking around inside
6197 uiout
->field_core_addr ("frame",
6198 b
->gdbarch
, b
->frame_id
.stack_addr
);
6202 if (!part_of_multiple
&& b
->cond_string
)
6205 if (is_tracepoint (b
))
6206 uiout
->text ("\ttrace only if ");
6208 uiout
->text ("\tstop only if ");
6209 uiout
->field_string ("cond", b
->cond_string
);
6211 /* Print whether the target is doing the breakpoint's condition
6212 evaluation. If GDB is doing the evaluation, don't print anything. */
6213 if (is_breakpoint (b
)
6214 && breakpoint_condition_evaluation_mode ()
6215 == condition_evaluation_target
)
6218 uiout
->field_string ("evaluated-by",
6219 bp_condition_evaluator (b
));
6220 uiout
->text (" evals)");
6225 if (!part_of_multiple
&& b
->thread
!= -1)
6227 /* FIXME should make an annotation for this. */
6228 uiout
->text ("\tstop only in thread ");
6229 if (uiout
->is_mi_like_p ())
6230 uiout
->field_int ("thread", b
->thread
);
6233 struct thread_info
*thr
= find_thread_global_id (b
->thread
);
6235 uiout
->field_string ("thread", print_thread_id (thr
));
6240 if (!part_of_multiple
)
6244 /* FIXME should make an annotation for this. */
6245 if (is_catchpoint (b
))
6246 uiout
->text ("\tcatchpoint");
6247 else if (is_tracepoint (b
))
6248 uiout
->text ("\ttracepoint");
6250 uiout
->text ("\tbreakpoint");
6251 uiout
->text (" already hit ");
6252 uiout
->field_int ("times", b
->hit_count
);
6253 if (b
->hit_count
== 1)
6254 uiout
->text (" time\n");
6256 uiout
->text (" times\n");
6260 /* Output the count also if it is zero, but only if this is mi. */
6261 if (uiout
->is_mi_like_p ())
6262 uiout
->field_int ("times", b
->hit_count
);
6266 if (!part_of_multiple
&& b
->ignore_count
)
6269 uiout
->text ("\tignore next ");
6270 uiout
->field_int ("ignore", b
->ignore_count
);
6271 uiout
->text (" hits\n");
6274 /* Note that an enable count of 1 corresponds to "enable once"
6275 behavior, which is reported by the combination of enablement and
6276 disposition, so we don't need to mention it here. */
6277 if (!part_of_multiple
&& b
->enable_count
> 1)
6280 uiout
->text ("\tdisable after ");
6281 /* Tweak the wording to clarify that ignore and enable counts
6282 are distinct, and have additive effect. */
6283 if (b
->ignore_count
)
6284 uiout
->text ("additional ");
6286 uiout
->text ("next ");
6287 uiout
->field_int ("enable", b
->enable_count
);
6288 uiout
->text (" hits\n");
6291 if (!part_of_multiple
&& is_tracepoint (b
))
6293 struct tracepoint
*tp
= (struct tracepoint
*) b
;
6295 if (tp
->traceframe_usage
)
6297 uiout
->text ("\ttrace buffer usage ");
6298 uiout
->field_int ("traceframe-usage", tp
->traceframe_usage
);
6299 uiout
->text (" bytes\n");
6303 l
= b
->commands
? b
->commands
.get () : NULL
;
6304 if (!part_of_multiple
&& l
)
6307 ui_out_emit_tuple
tuple_emitter (uiout
, "script");
6308 print_command_lines (uiout
, l
, 4);
6311 if (is_tracepoint (b
))
6313 struct tracepoint
*t
= (struct tracepoint
*) b
;
6315 if (!part_of_multiple
&& t
->pass_count
)
6317 annotate_field (10);
6318 uiout
->text ("\tpass count ");
6319 uiout
->field_int ("pass", t
->pass_count
);
6320 uiout
->text (" \n");
6323 /* Don't display it when tracepoint or tracepoint location is
6325 if (!header_of_multiple
&& loc
!= NULL
&& !loc
->shlib_disabled
)
6327 annotate_field (11);
6329 if (uiout
->is_mi_like_p ())
6330 uiout
->field_string ("installed",
6331 loc
->inserted
? "y" : "n");
6337 uiout
->text ("\tnot ");
6338 uiout
->text ("installed on target\n");
6343 if (uiout
->is_mi_like_p () && !part_of_multiple
)
6345 if (is_watchpoint (b
))
6347 struct watchpoint
*w
= (struct watchpoint
*) b
;
6349 uiout
->field_string ("original-location", w
->exp_string
);
6351 else if (b
->location
!= NULL
6352 && event_location_to_string (b
->location
.get ()) != NULL
)
6353 uiout
->field_string ("original-location",
6354 event_location_to_string (b
->location
.get ()));
6359 print_one_breakpoint (struct breakpoint
*b
,
6360 struct bp_location
**last_loc
,
6363 struct ui_out
*uiout
= current_uiout
;
6366 ui_out_emit_tuple
tuple_emitter (uiout
, "bkpt");
6368 print_one_breakpoint_location (b
, NULL
, 0, last_loc
, allflag
);
6371 /* If this breakpoint has custom print function,
6372 it's already printed. Otherwise, print individual
6373 locations, if any. */
6374 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
6376 /* If breakpoint has a single location that is disabled, we
6377 print it as if it had several locations, since otherwise it's
6378 hard to represent "breakpoint enabled, location disabled"
6381 Note that while hardware watchpoints have several locations
6382 internally, that's not a property exposed to user. */
6384 && !is_hardware_watchpoint (b
)
6385 && (b
->loc
->next
|| !b
->loc
->enabled
))
6387 struct bp_location
*loc
;
6390 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
6392 ui_out_emit_tuple
tuple_emitter (uiout
, NULL
);
6393 print_one_breakpoint_location (b
, loc
, n
, last_loc
, allflag
);
6400 breakpoint_address_bits (struct breakpoint
*b
)
6402 int print_address_bits
= 0;
6403 struct bp_location
*loc
;
6405 /* Software watchpoints that aren't watching memory don't have an
6406 address to print. */
6407 if (is_no_memory_software_watchpoint (b
))
6410 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
6414 addr_bit
= gdbarch_addr_bit (loc
->gdbarch
);
6415 if (addr_bit
> print_address_bits
)
6416 print_address_bits
= addr_bit
;
6419 return print_address_bits
;
6422 /* See breakpoint.h. */
6425 print_breakpoint (breakpoint
*b
)
6427 struct bp_location
*dummy_loc
= NULL
;
6428 print_one_breakpoint (b
, &dummy_loc
, 0);
6431 /* Return true if this breakpoint was set by the user, false if it is
6432 internal or momentary. */
6435 user_breakpoint_p (struct breakpoint
*b
)
6437 return b
->number
> 0;
6440 /* See breakpoint.h. */
6443 pending_breakpoint_p (struct breakpoint
*b
)
6445 return b
->loc
== NULL
;
6448 /* Print information on user settable breakpoint (watchpoint, etc)
6449 number BNUM. If BNUM is -1 print all user-settable breakpoints.
6450 If ALLFLAG is non-zero, include non-user-settable breakpoints. If
6451 FILTER is non-NULL, call it on each breakpoint and only include the
6452 ones for which it returns non-zero. Return the total number of
6453 breakpoints listed. */
6456 breakpoint_1 (const char *args
, int allflag
,
6457 int (*filter
) (const struct breakpoint
*))
6459 struct breakpoint
*b
;
6460 struct bp_location
*last_loc
= NULL
;
6461 int nr_printable_breakpoints
;
6462 struct value_print_options opts
;
6463 int print_address_bits
= 0;
6464 int print_type_col_width
= 14;
6465 struct ui_out
*uiout
= current_uiout
;
6467 get_user_print_options (&opts
);
6469 /* Compute the number of rows in the table, as well as the size
6470 required for address fields. */
6471 nr_printable_breakpoints
= 0;
6474 /* If we have a filter, only list the breakpoints it accepts. */
6475 if (filter
&& !filter (b
))
6478 /* If we have an "args" string, it is a list of breakpoints to
6479 accept. Skip the others. */
6480 if (args
!= NULL
&& *args
!= '\0')
6482 if (allflag
&& parse_and_eval_long (args
) != b
->number
)
6484 if (!allflag
&& !number_is_in_list (args
, b
->number
))
6488 if (allflag
|| user_breakpoint_p (b
))
6490 int addr_bit
, type_len
;
6492 addr_bit
= breakpoint_address_bits (b
);
6493 if (addr_bit
> print_address_bits
)
6494 print_address_bits
= addr_bit
;
6496 type_len
= strlen (bptype_string (b
->type
));
6497 if (type_len
> print_type_col_width
)
6498 print_type_col_width
= type_len
;
6500 nr_printable_breakpoints
++;
6505 ui_out_emit_table
table_emitter (uiout
,
6506 opts
.addressprint
? 6 : 5,
6507 nr_printable_breakpoints
,
6510 if (nr_printable_breakpoints
> 0)
6511 annotate_breakpoints_headers ();
6512 if (nr_printable_breakpoints
> 0)
6514 uiout
->table_header (7, ui_left
, "number", "Num"); /* 1 */
6515 if (nr_printable_breakpoints
> 0)
6517 uiout
->table_header (print_type_col_width
, ui_left
, "type", "Type"); /* 2 */
6518 if (nr_printable_breakpoints
> 0)
6520 uiout
->table_header (4, ui_left
, "disp", "Disp"); /* 3 */
6521 if (nr_printable_breakpoints
> 0)
6523 uiout
->table_header (3, ui_left
, "enabled", "Enb"); /* 4 */
6524 if (opts
.addressprint
)
6526 if (nr_printable_breakpoints
> 0)
6528 if (print_address_bits
<= 32)
6529 uiout
->table_header (10, ui_left
, "addr", "Address"); /* 5 */
6531 uiout
->table_header (18, ui_left
, "addr", "Address"); /* 5 */
6533 if (nr_printable_breakpoints
> 0)
6535 uiout
->table_header (40, ui_noalign
, "what", "What"); /* 6 */
6536 uiout
->table_body ();
6537 if (nr_printable_breakpoints
> 0)
6538 annotate_breakpoints_table ();
6543 /* If we have a filter, only list the breakpoints it accepts. */
6544 if (filter
&& !filter (b
))
6547 /* If we have an "args" string, it is a list of breakpoints to
6548 accept. Skip the others. */
6550 if (args
!= NULL
&& *args
!= '\0')
6552 if (allflag
) /* maintenance info breakpoint */
6554 if (parse_and_eval_long (args
) != b
->number
)
6557 else /* all others */
6559 if (!number_is_in_list (args
, b
->number
))
6563 /* We only print out user settable breakpoints unless the
6565 if (allflag
|| user_breakpoint_p (b
))
6566 print_one_breakpoint (b
, &last_loc
, allflag
);
6570 if (nr_printable_breakpoints
== 0)
6572 /* If there's a filter, let the caller decide how to report
6576 if (args
== NULL
|| *args
== '\0')
6577 uiout
->message ("No breakpoints or watchpoints.\n");
6579 uiout
->message ("No breakpoint or watchpoint matching '%s'.\n",
6585 if (last_loc
&& !server_command
)
6586 set_next_address (last_loc
->gdbarch
, last_loc
->address
);
6589 /* FIXME? Should this be moved up so that it is only called when
6590 there have been breakpoints? */
6591 annotate_breakpoints_table_end ();
6593 return nr_printable_breakpoints
;
6596 /* Display the value of default-collect in a way that is generally
6597 compatible with the breakpoint list. */
6600 default_collect_info (void)
6602 struct ui_out
*uiout
= current_uiout
;
6604 /* If it has no value (which is frequently the case), say nothing; a
6605 message like "No default-collect." gets in user's face when it's
6607 if (!*default_collect
)
6610 /* The following phrase lines up nicely with per-tracepoint collect
6612 uiout
->text ("default collect ");
6613 uiout
->field_string ("default-collect", default_collect
);
6614 uiout
->text (" \n");
6618 info_breakpoints_command (const char *args
, int from_tty
)
6620 breakpoint_1 (args
, 0, NULL
);
6622 default_collect_info ();
6626 info_watchpoints_command (const char *args
, int from_tty
)
6628 int num_printed
= breakpoint_1 (args
, 0, is_watchpoint
);
6629 struct ui_out
*uiout
= current_uiout
;
6631 if (num_printed
== 0)
6633 if (args
== NULL
|| *args
== '\0')
6634 uiout
->message ("No watchpoints.\n");
6636 uiout
->message ("No watchpoint matching '%s'.\n", args
);
6641 maintenance_info_breakpoints (const char *args
, int from_tty
)
6643 breakpoint_1 (args
, 1, NULL
);
6645 default_collect_info ();
6649 breakpoint_has_pc (struct breakpoint
*b
,
6650 struct program_space
*pspace
,
6651 CORE_ADDR pc
, struct obj_section
*section
)
6653 struct bp_location
*bl
= b
->loc
;
6655 for (; bl
; bl
= bl
->next
)
6657 if (bl
->pspace
== pspace
6658 && bl
->address
== pc
6659 && (!overlay_debugging
|| bl
->section
== section
))
6665 /* Print a message describing any user-breakpoints set at PC. This
6666 concerns with logical breakpoints, so we match program spaces, not
6670 describe_other_breakpoints (struct gdbarch
*gdbarch
,
6671 struct program_space
*pspace
, CORE_ADDR pc
,
6672 struct obj_section
*section
, int thread
)
6675 struct breakpoint
*b
;
6678 others
+= (user_breakpoint_p (b
)
6679 && breakpoint_has_pc (b
, pspace
, pc
, section
));
6683 printf_filtered (_("Note: breakpoint "));
6684 else /* if (others == ???) */
6685 printf_filtered (_("Note: breakpoints "));
6687 if (user_breakpoint_p (b
) && breakpoint_has_pc (b
, pspace
, pc
, section
))
6690 printf_filtered ("%d", b
->number
);
6691 if (b
->thread
== -1 && thread
!= -1)
6692 printf_filtered (" (all threads)");
6693 else if (b
->thread
!= -1)
6694 printf_filtered (" (thread %d)", b
->thread
);
6695 printf_filtered ("%s%s ",
6696 ((b
->enable_state
== bp_disabled
6697 || b
->enable_state
== bp_call_disabled
)
6701 : ((others
== 1) ? " and" : ""));
6703 printf_filtered (_("also set at pc "));
6704 fputs_filtered (paddress (gdbarch
, pc
), gdb_stdout
);
6705 printf_filtered (".\n");
6710 /* Return true iff it is meaningful to use the address member of
6711 BPT locations. For some breakpoint types, the locations' address members
6712 are irrelevant and it makes no sense to attempt to compare them to other
6713 addresses (or use them for any other purpose either).
6715 More specifically, each of the following breakpoint types will
6716 always have a zero valued location address and we don't want to mark
6717 breakpoints of any of these types to be a duplicate of an actual
6718 breakpoint location at address zero:
6726 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
6728 enum bptype type
= bpt
->type
;
6730 return (type
!= bp_watchpoint
&& type
!= bp_catchpoint
);
6733 /* Assuming LOC1 and LOC2's owners are hardware watchpoints, returns
6734 true if LOC1 and LOC2 represent the same watchpoint location. */
6737 watchpoint_locations_match (struct bp_location
*loc1
,
6738 struct bp_location
*loc2
)
6740 struct watchpoint
*w1
= (struct watchpoint
*) loc1
->owner
;
6741 struct watchpoint
*w2
= (struct watchpoint
*) loc2
->owner
;
6743 /* Both of them must exist. */
6744 gdb_assert (w1
!= NULL
);
6745 gdb_assert (w2
!= NULL
);
6747 /* If the target can evaluate the condition expression in hardware,
6748 then we we need to insert both watchpoints even if they are at
6749 the same place. Otherwise the watchpoint will only trigger when
6750 the condition of whichever watchpoint was inserted evaluates to
6751 true, not giving a chance for GDB to check the condition of the
6752 other watchpoint. */
6754 && target_can_accel_watchpoint_condition (loc1
->address
,
6756 loc1
->watchpoint_type
,
6757 w1
->cond_exp
.get ()))
6759 && target_can_accel_watchpoint_condition (loc2
->address
,
6761 loc2
->watchpoint_type
,
6762 w2
->cond_exp
.get ())))
6765 /* Note that this checks the owner's type, not the location's. In
6766 case the target does not support read watchpoints, but does
6767 support access watchpoints, we'll have bp_read_watchpoint
6768 watchpoints with hw_access locations. Those should be considered
6769 duplicates of hw_read locations. The hw_read locations will
6770 become hw_access locations later. */
6771 return (loc1
->owner
->type
== loc2
->owner
->type
6772 && loc1
->pspace
->aspace
== loc2
->pspace
->aspace
6773 && loc1
->address
== loc2
->address
6774 && loc1
->length
== loc2
->length
);
6777 /* See breakpoint.h. */
6780 breakpoint_address_match (const address_space
*aspace1
, CORE_ADDR addr1
,
6781 const address_space
*aspace2
, CORE_ADDR addr2
)
6783 return ((gdbarch_has_global_breakpoints (target_gdbarch ())
6784 || aspace1
== aspace2
)
6788 /* Returns true if {ASPACE2,ADDR2} falls within the range determined by
6789 {ASPACE1,ADDR1,LEN1}. In most targets, this can only be true if ASPACE1
6790 matches ASPACE2. On targets that have global breakpoints, the address
6791 space doesn't really matter. */
6794 breakpoint_address_match_range (const address_space
*aspace1
,
6796 int len1
, const address_space
*aspace2
,
6799 return ((gdbarch_has_global_breakpoints (target_gdbarch ())
6800 || aspace1
== aspace2
)
6801 && addr2
>= addr1
&& addr2
< addr1
+ len1
);
6804 /* Returns true if {ASPACE,ADDR} matches the breakpoint BL. BL may be
6805 a ranged breakpoint. In most targets, a match happens only if ASPACE
6806 matches the breakpoint's address space. On targets that have global
6807 breakpoints, the address space doesn't really matter. */
6810 breakpoint_location_address_match (struct bp_location
*bl
,
6811 const address_space
*aspace
,
6814 return (breakpoint_address_match (bl
->pspace
->aspace
, bl
->address
,
6817 && breakpoint_address_match_range (bl
->pspace
->aspace
,
6818 bl
->address
, bl
->length
,
6822 /* Returns true if the [ADDR,ADDR+LEN) range in ASPACE overlaps
6823 breakpoint BL. BL may be a ranged breakpoint. In most targets, a
6824 match happens only if ASPACE matches the breakpoint's address
6825 space. On targets that have global breakpoints, the address space
6826 doesn't really matter. */
6829 breakpoint_location_address_range_overlap (struct bp_location
*bl
,
6830 const address_space
*aspace
,
6831 CORE_ADDR addr
, int len
)
6833 if (gdbarch_has_global_breakpoints (target_gdbarch ())
6834 || bl
->pspace
->aspace
== aspace
)
6836 int bl_len
= bl
->length
!= 0 ? bl
->length
: 1;
6838 if (mem_ranges_overlap (addr
, len
, bl
->address
, bl_len
))
6844 /* If LOC1 and LOC2's owners are not tracepoints, returns false directly.
6845 Then, if LOC1 and LOC2 represent the same tracepoint location, returns
6846 true, otherwise returns false. */
6849 tracepoint_locations_match (struct bp_location
*loc1
,
6850 struct bp_location
*loc2
)
6852 if (is_tracepoint (loc1
->owner
) && is_tracepoint (loc2
->owner
))
6853 /* Since tracepoint locations are never duplicated with others', tracepoint
6854 locations at the same address of different tracepoints are regarded as
6855 different locations. */
6856 return (loc1
->address
== loc2
->address
&& loc1
->owner
== loc2
->owner
);
6861 /* Assuming LOC1 and LOC2's types' have meaningful target addresses
6862 (breakpoint_address_is_meaningful), returns true if LOC1 and LOC2
6863 represent the same location. */
6866 breakpoint_locations_match (struct bp_location
*loc1
,
6867 struct bp_location
*loc2
)
6869 int hw_point1
, hw_point2
;
6871 /* Both of them must not be in moribund_locations. */
6872 gdb_assert (loc1
->owner
!= NULL
);
6873 gdb_assert (loc2
->owner
!= NULL
);
6875 hw_point1
= is_hardware_watchpoint (loc1
->owner
);
6876 hw_point2
= is_hardware_watchpoint (loc2
->owner
);
6878 if (hw_point1
!= hw_point2
)
6881 return watchpoint_locations_match (loc1
, loc2
);
6882 else if (is_tracepoint (loc1
->owner
) || is_tracepoint (loc2
->owner
))
6883 return tracepoint_locations_match (loc1
, loc2
);
6885 /* We compare bp_location.length in order to cover ranged breakpoints. */
6886 return (breakpoint_address_match (loc1
->pspace
->aspace
, loc1
->address
,
6887 loc2
->pspace
->aspace
, loc2
->address
)
6888 && loc1
->length
== loc2
->length
);
6892 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
6893 int bnum
, int have_bnum
)
6895 /* The longest string possibly returned by hex_string_custom
6896 is 50 chars. These must be at least that big for safety. */
6900 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
6901 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
6903 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
6904 bnum
, astr1
, astr2
);
6906 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
6909 /* Adjust a breakpoint's address to account for architectural
6910 constraints on breakpoint placement. Return the adjusted address.
6911 Note: Very few targets require this kind of adjustment. For most
6912 targets, this function is simply the identity function. */
6915 adjust_breakpoint_address (struct gdbarch
*gdbarch
,
6916 CORE_ADDR bpaddr
, enum bptype bptype
)
6918 if (bptype
== bp_watchpoint
6919 || bptype
== bp_hardware_watchpoint
6920 || bptype
== bp_read_watchpoint
6921 || bptype
== bp_access_watchpoint
6922 || bptype
== bp_catchpoint
)
6924 /* Watchpoints and the various bp_catch_* eventpoints should not
6925 have their addresses modified. */
6928 else if (bptype
== bp_single_step
)
6930 /* Single-step breakpoints should not have their addresses
6931 modified. If there's any architectural constrain that
6932 applies to this address, then it should have already been
6933 taken into account when the breakpoint was created in the
6934 first place. If we didn't do this, stepping through e.g.,
6935 Thumb-2 IT blocks would break. */
6940 CORE_ADDR adjusted_bpaddr
= bpaddr
;
6942 if (gdbarch_adjust_breakpoint_address_p (gdbarch
))
6944 /* Some targets have architectural constraints on the placement
6945 of breakpoint instructions. Obtain the adjusted address. */
6946 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (gdbarch
, bpaddr
);
6949 adjusted_bpaddr
= address_significant (gdbarch
, adjusted_bpaddr
);
6951 /* An adjusted breakpoint address can significantly alter
6952 a user's expectations. Print a warning if an adjustment
6954 if (adjusted_bpaddr
!= bpaddr
)
6955 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
6957 return adjusted_bpaddr
;
6961 bp_location::bp_location (const bp_location_ops
*ops
, breakpoint
*owner
)
6963 bp_location
*loc
= this;
6965 gdb_assert (ops
!= NULL
);
6969 loc
->cond_bytecode
= NULL
;
6970 loc
->shlib_disabled
= 0;
6973 switch (owner
->type
)
6976 case bp_single_step
:
6980 case bp_longjmp_resume
:
6981 case bp_longjmp_call_dummy
:
6983 case bp_exception_resume
:
6984 case bp_step_resume
:
6985 case bp_hp_step_resume
:
6986 case bp_watchpoint_scope
:
6988 case bp_std_terminate
:
6989 case bp_shlib_event
:
6990 case bp_thread_event
:
6991 case bp_overlay_event
:
6993 case bp_longjmp_master
:
6994 case bp_std_terminate_master
:
6995 case bp_exception_master
:
6996 case bp_gnu_ifunc_resolver
:
6997 case bp_gnu_ifunc_resolver_return
:
6999 loc
->loc_type
= bp_loc_software_breakpoint
;
7000 mark_breakpoint_location_modified (loc
);
7002 case bp_hardware_breakpoint
:
7003 loc
->loc_type
= bp_loc_hardware_breakpoint
;
7004 mark_breakpoint_location_modified (loc
);
7006 case bp_hardware_watchpoint
:
7007 case bp_read_watchpoint
:
7008 case bp_access_watchpoint
:
7009 loc
->loc_type
= bp_loc_hardware_watchpoint
;
7014 case bp_fast_tracepoint
:
7015 case bp_static_tracepoint
:
7016 loc
->loc_type
= bp_loc_other
;
7019 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
7025 /* Allocate a struct bp_location. */
7027 static struct bp_location
*
7028 allocate_bp_location (struct breakpoint
*bpt
)
7030 return bpt
->ops
->allocate_location (bpt
);
7034 free_bp_location (struct bp_location
*loc
)
7036 loc
->ops
->dtor (loc
);
7040 /* Increment reference count. */
7043 incref_bp_location (struct bp_location
*bl
)
7048 /* Decrement reference count. If the reference count reaches 0,
7049 destroy the bp_location. Sets *BLP to NULL. */
7052 decref_bp_location (struct bp_location
**blp
)
7054 gdb_assert ((*blp
)->refc
> 0);
7056 if (--(*blp
)->refc
== 0)
7057 free_bp_location (*blp
);
7061 /* Add breakpoint B at the end of the global breakpoint chain. */
7064 add_to_breakpoint_chain (std::unique_ptr
<breakpoint
> &&b
)
7066 struct breakpoint
*b1
;
7067 struct breakpoint
*result
= b
.get ();
7069 /* Add this breakpoint to the end of the chain so that a list of
7070 breakpoints will come out in order of increasing numbers. */
7072 b1
= breakpoint_chain
;
7074 breakpoint_chain
= b
.release ();
7079 b1
->next
= b
.release ();
7085 /* Initializes breakpoint B with type BPTYPE and no locations yet. */
7088 init_raw_breakpoint_without_location (struct breakpoint
*b
,
7089 struct gdbarch
*gdbarch
,
7091 const struct breakpoint_ops
*ops
)
7093 gdb_assert (ops
!= NULL
);
7097 b
->gdbarch
= gdbarch
;
7098 b
->language
= current_language
->la_language
;
7099 b
->input_radix
= input_radix
;
7100 b
->related_breakpoint
= b
;
7103 /* Helper to set_raw_breakpoint below. Creates a breakpoint
7104 that has type BPTYPE and has no locations as yet. */
7106 static struct breakpoint
*
7107 set_raw_breakpoint_without_location (struct gdbarch
*gdbarch
,
7109 const struct breakpoint_ops
*ops
)
7111 std::unique_ptr
<breakpoint
> b
= new_breakpoint_from_type (bptype
);
7113 init_raw_breakpoint_without_location (b
.get (), gdbarch
, bptype
, ops
);
7114 return add_to_breakpoint_chain (std::move (b
));
7117 /* Initialize loc->function_name. EXPLICIT_LOC says no indirect function
7118 resolutions should be made as the user specified the location explicitly
7122 set_breakpoint_location_function (struct bp_location
*loc
, int explicit_loc
)
7124 gdb_assert (loc
->owner
!= NULL
);
7126 if (loc
->owner
->type
== bp_breakpoint
7127 || loc
->owner
->type
== bp_hardware_breakpoint
7128 || is_tracepoint (loc
->owner
))
7130 const char *function_name
;
7132 if (loc
->msymbol
!= NULL
7133 && (MSYMBOL_TYPE (loc
->msymbol
) == mst_text_gnu_ifunc
7134 || MSYMBOL_TYPE (loc
->msymbol
) == mst_data_gnu_ifunc
)
7137 struct breakpoint
*b
= loc
->owner
;
7139 function_name
= MSYMBOL_LINKAGE_NAME (loc
->msymbol
);
7141 if (b
->type
== bp_breakpoint
&& b
->loc
== loc
7142 && loc
->next
== NULL
&& b
->related_breakpoint
== b
)
7144 /* Create only the whole new breakpoint of this type but do not
7145 mess more complicated breakpoints with multiple locations. */
7146 b
->type
= bp_gnu_ifunc_resolver
;
7147 /* Remember the resolver's address for use by the return
7149 loc
->related_address
= loc
->address
;
7153 find_pc_partial_function (loc
->address
, &function_name
, NULL
, NULL
);
7156 loc
->function_name
= xstrdup (function_name
);
7160 /* Attempt to determine architecture of location identified by SAL. */
7162 get_sal_arch (struct symtab_and_line sal
)
7165 return get_objfile_arch (sal
.section
->objfile
);
7167 return get_objfile_arch (SYMTAB_OBJFILE (sal
.symtab
));
7172 /* Low level routine for partially initializing a breakpoint of type
7173 BPTYPE. The newly created breakpoint's address, section, source
7174 file name, and line number are provided by SAL.
7176 It is expected that the caller will complete the initialization of
7177 the newly created breakpoint struct as well as output any status
7178 information regarding the creation of a new breakpoint. */
7181 init_raw_breakpoint (struct breakpoint
*b
, struct gdbarch
*gdbarch
,
7182 struct symtab_and_line sal
, enum bptype bptype
,
7183 const struct breakpoint_ops
*ops
)
7185 init_raw_breakpoint_without_location (b
, gdbarch
, bptype
, ops
);
7187 add_location_to_breakpoint (b
, &sal
);
7189 if (bptype
!= bp_catchpoint
)
7190 gdb_assert (sal
.pspace
!= NULL
);
7192 /* Store the program space that was used to set the breakpoint,
7193 except for ordinary breakpoints, which are independent of the
7195 if (bptype
!= bp_breakpoint
&& bptype
!= bp_hardware_breakpoint
)
7196 b
->pspace
= sal
.pspace
;
7199 /* set_raw_breakpoint is a low level routine for allocating and
7200 partially initializing a breakpoint of type BPTYPE. The newly
7201 created breakpoint's address, section, source file name, and line
7202 number are provided by SAL. The newly created and partially
7203 initialized breakpoint is added to the breakpoint chain and
7204 is also returned as the value of this function.
7206 It is expected that the caller will complete the initialization of
7207 the newly created breakpoint struct as well as output any status
7208 information regarding the creation of a new breakpoint. In
7209 particular, set_raw_breakpoint does NOT set the breakpoint
7210 number! Care should be taken to not allow an error to occur
7211 prior to completing the initialization of the breakpoint. If this
7212 should happen, a bogus breakpoint will be left on the chain. */
7215 set_raw_breakpoint (struct gdbarch
*gdbarch
,
7216 struct symtab_and_line sal
, enum bptype bptype
,
7217 const struct breakpoint_ops
*ops
)
7219 std::unique_ptr
<breakpoint
> b
= new_breakpoint_from_type (bptype
);
7221 init_raw_breakpoint (b
.get (), gdbarch
, sal
, bptype
, ops
);
7222 return add_to_breakpoint_chain (std::move (b
));
7225 /* Call this routine when stepping and nexting to enable a breakpoint
7226 if we do a longjmp() or 'throw' in TP. FRAME is the frame which
7227 initiated the operation. */
7230 set_longjmp_breakpoint (struct thread_info
*tp
, struct frame_id frame
)
7232 struct breakpoint
*b
, *b_tmp
;
7233 int thread
= tp
->global_num
;
7235 /* To avoid having to rescan all objfile symbols at every step,
7236 we maintain a list of continually-inserted but always disabled
7237 longjmp "master" breakpoints. Here, we simply create momentary
7238 clones of those and enable them for the requested thread. */
7239 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
7240 if (b
->pspace
== current_program_space
7241 && (b
->type
== bp_longjmp_master
7242 || b
->type
== bp_exception_master
))
7244 enum bptype type
= b
->type
== bp_longjmp_master
? bp_longjmp
: bp_exception
;
7245 struct breakpoint
*clone
;
7247 /* longjmp_breakpoint_ops ensures INITIATING_FRAME is cleared again
7248 after their removal. */
7249 clone
= momentary_breakpoint_from_master (b
, type
,
7250 &momentary_breakpoint_ops
, 1);
7251 clone
->thread
= thread
;
7254 tp
->initiating_frame
= frame
;
7257 /* Delete all longjmp breakpoints from THREAD. */
7259 delete_longjmp_breakpoint (int thread
)
7261 struct breakpoint
*b
, *b_tmp
;
7263 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
7264 if (b
->type
== bp_longjmp
|| b
->type
== bp_exception
)
7266 if (b
->thread
== thread
)
7267 delete_breakpoint (b
);
7272 delete_longjmp_breakpoint_at_next_stop (int thread
)
7274 struct breakpoint
*b
, *b_tmp
;
7276 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
7277 if (b
->type
== bp_longjmp
|| b
->type
== bp_exception
)
7279 if (b
->thread
== thread
)
7280 b
->disposition
= disp_del_at_next_stop
;
7284 /* Place breakpoints of type bp_longjmp_call_dummy to catch longjmp for
7285 INFERIOR_PTID thread. Chain them all by RELATED_BREAKPOINT and return
7286 pointer to any of them. Return NULL if this system cannot place longjmp
7290 set_longjmp_breakpoint_for_call_dummy (void)
7292 struct breakpoint
*b
, *retval
= NULL
;
7295 if (b
->pspace
== current_program_space
&& b
->type
== bp_longjmp_master
)
7297 struct breakpoint
*new_b
;
7299 new_b
= momentary_breakpoint_from_master (b
, bp_longjmp_call_dummy
,
7300 &momentary_breakpoint_ops
,
7302 new_b
->thread
= inferior_thread ()->global_num
;
7304 /* Link NEW_B into the chain of RETVAL breakpoints. */
7306 gdb_assert (new_b
->related_breakpoint
== new_b
);
7309 new_b
->related_breakpoint
= retval
;
7310 while (retval
->related_breakpoint
!= new_b
->related_breakpoint
)
7311 retval
= retval
->related_breakpoint
;
7312 retval
->related_breakpoint
= new_b
;
7318 /* Verify all existing dummy frames and their associated breakpoints for
7319 TP. Remove those which can no longer be found in the current frame
7322 You should call this function only at places where it is safe to currently
7323 unwind the whole stack. Failed stack unwind would discard live dummy
7327 check_longjmp_breakpoint_for_call_dummy (struct thread_info
*tp
)
7329 struct breakpoint
*b
, *b_tmp
;
7331 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
7332 if (b
->type
== bp_longjmp_call_dummy
&& b
->thread
== tp
->global_num
)
7334 struct breakpoint
*dummy_b
= b
->related_breakpoint
;
7336 while (dummy_b
!= b
&& dummy_b
->type
!= bp_call_dummy
)
7337 dummy_b
= dummy_b
->related_breakpoint
;
7338 if (dummy_b
->type
!= bp_call_dummy
7339 || frame_find_by_id (dummy_b
->frame_id
) != NULL
)
7342 dummy_frame_discard (dummy_b
->frame_id
, tp
);
7344 while (b
->related_breakpoint
!= b
)
7346 if (b_tmp
== b
->related_breakpoint
)
7347 b_tmp
= b
->related_breakpoint
->next
;
7348 delete_breakpoint (b
->related_breakpoint
);
7350 delete_breakpoint (b
);
7355 enable_overlay_breakpoints (void)
7357 struct breakpoint
*b
;
7360 if (b
->type
== bp_overlay_event
)
7362 b
->enable_state
= bp_enabled
;
7363 update_global_location_list (UGLL_MAY_INSERT
);
7364 overlay_events_enabled
= 1;
7369 disable_overlay_breakpoints (void)
7371 struct breakpoint
*b
;
7374 if (b
->type
== bp_overlay_event
)
7376 b
->enable_state
= bp_disabled
;
7377 update_global_location_list (UGLL_DONT_INSERT
);
7378 overlay_events_enabled
= 0;
7382 /* Set an active std::terminate breakpoint for each std::terminate
7383 master breakpoint. */
7385 set_std_terminate_breakpoint (void)
7387 struct breakpoint
*b
, *b_tmp
;
7389 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
7390 if (b
->pspace
== current_program_space
7391 && b
->type
== bp_std_terminate_master
)
7393 momentary_breakpoint_from_master (b
, bp_std_terminate
,
7394 &momentary_breakpoint_ops
, 1);
7398 /* Delete all the std::terminate breakpoints. */
7400 delete_std_terminate_breakpoint (void)
7402 struct breakpoint
*b
, *b_tmp
;
7404 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
7405 if (b
->type
== bp_std_terminate
)
7406 delete_breakpoint (b
);
7410 create_thread_event_breakpoint (struct gdbarch
*gdbarch
, CORE_ADDR address
)
7412 struct breakpoint
*b
;
7414 b
= create_internal_breakpoint (gdbarch
, address
, bp_thread_event
,
7415 &internal_breakpoint_ops
);
7417 b
->enable_state
= bp_enabled
;
7418 /* location has to be used or breakpoint_re_set will delete me. */
7419 b
->location
= new_address_location (b
->loc
->address
, NULL
, 0);
7421 update_global_location_list_nothrow (UGLL_MAY_INSERT
);
7426 struct lang_and_radix
7432 /* Create a breakpoint for JIT code registration and unregistration. */
7435 create_jit_event_breakpoint (struct gdbarch
*gdbarch
, CORE_ADDR address
)
7437 return create_internal_breakpoint (gdbarch
, address
, bp_jit_event
,
7438 &internal_breakpoint_ops
);
7441 /* Remove JIT code registration and unregistration breakpoint(s). */
7444 remove_jit_event_breakpoints (void)
7446 struct breakpoint
*b
, *b_tmp
;
7448 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
7449 if (b
->type
== bp_jit_event
7450 && b
->loc
->pspace
== current_program_space
)
7451 delete_breakpoint (b
);
7455 remove_solib_event_breakpoints (void)
7457 struct breakpoint
*b
, *b_tmp
;
7459 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
7460 if (b
->type
== bp_shlib_event
7461 && b
->loc
->pspace
== current_program_space
)
7462 delete_breakpoint (b
);
7465 /* See breakpoint.h. */
7468 remove_solib_event_breakpoints_at_next_stop (void)
7470 struct breakpoint
*b
, *b_tmp
;
7472 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
7473 if (b
->type
== bp_shlib_event
7474 && b
->loc
->pspace
== current_program_space
)
7475 b
->disposition
= disp_del_at_next_stop
;
7478 /* Helper for create_solib_event_breakpoint /
7479 create_and_insert_solib_event_breakpoint. Allows specifying which
7480 INSERT_MODE to pass through to update_global_location_list. */
7482 static struct breakpoint
*
7483 create_solib_event_breakpoint_1 (struct gdbarch
*gdbarch
, CORE_ADDR address
,
7484 enum ugll_insert_mode insert_mode
)
7486 struct breakpoint
*b
;
7488 b
= create_internal_breakpoint (gdbarch
, address
, bp_shlib_event
,
7489 &internal_breakpoint_ops
);
7490 update_global_location_list_nothrow (insert_mode
);
7495 create_solib_event_breakpoint (struct gdbarch
*gdbarch
, CORE_ADDR address
)
7497 return create_solib_event_breakpoint_1 (gdbarch
, address
, UGLL_MAY_INSERT
);
7500 /* See breakpoint.h. */
7503 create_and_insert_solib_event_breakpoint (struct gdbarch
*gdbarch
, CORE_ADDR address
)
7505 struct breakpoint
*b
;
7507 /* Explicitly tell update_global_location_list to insert
7509 b
= create_solib_event_breakpoint_1 (gdbarch
, address
, UGLL_INSERT
);
7510 if (!b
->loc
->inserted
)
7512 delete_breakpoint (b
);
7518 /* Disable any breakpoints that are on code in shared libraries. Only
7519 apply to enabled breakpoints, disabled ones can just stay disabled. */
7522 disable_breakpoints_in_shlibs (void)
7524 struct bp_location
*loc
, **locp_tmp
;
7526 ALL_BP_LOCATIONS (loc
, locp_tmp
)
7528 /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */
7529 struct breakpoint
*b
= loc
->owner
;
7531 /* We apply the check to all breakpoints, including disabled for
7532 those with loc->duplicate set. This is so that when breakpoint
7533 becomes enabled, or the duplicate is removed, gdb will try to
7534 insert all breakpoints. If we don't set shlib_disabled here,
7535 we'll try to insert those breakpoints and fail. */
7536 if (((b
->type
== bp_breakpoint
)
7537 || (b
->type
== bp_jit_event
)
7538 || (b
->type
== bp_hardware_breakpoint
)
7539 || (is_tracepoint (b
)))
7540 && loc
->pspace
== current_program_space
7541 && !loc
->shlib_disabled
7542 && solib_name_from_address (loc
->pspace
, loc
->address
)
7545 loc
->shlib_disabled
= 1;
7550 /* Disable any breakpoints and tracepoints that are in SOLIB upon
7551 notification of unloaded_shlib. Only apply to enabled breakpoints,
7552 disabled ones can just stay disabled. */
7555 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
7557 struct bp_location
*loc
, **locp_tmp
;
7558 int disabled_shlib_breaks
= 0;
7560 ALL_BP_LOCATIONS (loc
, locp_tmp
)
7562 /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */
7563 struct breakpoint
*b
= loc
->owner
;
7565 if (solib
->pspace
== loc
->pspace
7566 && !loc
->shlib_disabled
7567 && (((b
->type
== bp_breakpoint
7568 || b
->type
== bp_jit_event
7569 || b
->type
== bp_hardware_breakpoint
)
7570 && (loc
->loc_type
== bp_loc_hardware_breakpoint
7571 || loc
->loc_type
== bp_loc_software_breakpoint
))
7572 || is_tracepoint (b
))
7573 && solib_contains_address_p (solib
, loc
->address
))
7575 loc
->shlib_disabled
= 1;
7576 /* At this point, we cannot rely on remove_breakpoint
7577 succeeding so we must mark the breakpoint as not inserted
7578 to prevent future errors occurring in remove_breakpoints. */
7581 /* This may cause duplicate notifications for the same breakpoint. */
7582 gdb::observers::breakpoint_modified
.notify (b
);
7584 if (!disabled_shlib_breaks
)
7586 target_terminal::ours_for_output ();
7587 warning (_("Temporarily disabling breakpoints "
7588 "for unloaded shared library \"%s\""),
7591 disabled_shlib_breaks
= 1;
7596 /* Disable any breakpoints and tracepoints in OBJFILE upon
7597 notification of free_objfile. Only apply to enabled breakpoints,
7598 disabled ones can just stay disabled. */
7601 disable_breakpoints_in_freed_objfile (struct objfile
*objfile
)
7603 struct breakpoint
*b
;
7605 if (objfile
== NULL
)
7608 /* OBJF_SHARED|OBJF_USERLOADED objfiles are dynamic modules manually
7609 managed by the user with add-symbol-file/remove-symbol-file.
7610 Similarly to how breakpoints in shared libraries are handled in
7611 response to "nosharedlibrary", mark breakpoints in such modules
7612 shlib_disabled so they end up uninserted on the next global
7613 location list update. Shared libraries not loaded by the user
7614 aren't handled here -- they're already handled in
7615 disable_breakpoints_in_unloaded_shlib, called by solib.c's
7616 solib_unloaded observer. We skip objfiles that are not
7617 OBJF_SHARED as those aren't considered dynamic objects (e.g. the
7619 if ((objfile
->flags
& OBJF_SHARED
) == 0
7620 || (objfile
->flags
& OBJF_USERLOADED
) == 0)
7625 struct bp_location
*loc
;
7626 int bp_modified
= 0;
7628 if (!is_breakpoint (b
) && !is_tracepoint (b
))
7631 for (loc
= b
->loc
; loc
!= NULL
; loc
= loc
->next
)
7633 CORE_ADDR loc_addr
= loc
->address
;
7635 if (loc
->loc_type
!= bp_loc_hardware_breakpoint
7636 && loc
->loc_type
!= bp_loc_software_breakpoint
)
7639 if (loc
->shlib_disabled
!= 0)
7642 if (objfile
->pspace
!= loc
->pspace
)
7645 if (loc
->loc_type
!= bp_loc_hardware_breakpoint
7646 && loc
->loc_type
!= bp_loc_software_breakpoint
)
7649 if (is_addr_in_objfile (loc_addr
, objfile
))
7651 loc
->shlib_disabled
= 1;
7652 /* At this point, we don't know whether the object was
7653 unmapped from the inferior or not, so leave the
7654 inserted flag alone. We'll handle failure to
7655 uninsert quietly, in case the object was indeed
7658 mark_breakpoint_location_modified (loc
);
7665 gdb::observers::breakpoint_modified
.notify (b
);
7669 /* FORK & VFORK catchpoints. */
7671 /* An instance of this type is used to represent a fork or vfork
7672 catchpoint. A breakpoint is really of this type iff its ops pointer points
7673 to CATCH_FORK_BREAKPOINT_OPS. */
7675 struct fork_catchpoint
: public breakpoint
7677 /* Process id of a child process whose forking triggered this
7678 catchpoint. This field is only valid immediately after this
7679 catchpoint has triggered. */
7680 ptid_t forked_inferior_pid
;
7683 /* Implement the "insert" breakpoint_ops method for fork
7687 insert_catch_fork (struct bp_location
*bl
)
7689 return target_insert_fork_catchpoint (inferior_ptid
.pid ());
7692 /* Implement the "remove" breakpoint_ops method for fork
7696 remove_catch_fork (struct bp_location
*bl
, enum remove_bp_reason reason
)
7698 return target_remove_fork_catchpoint (inferior_ptid
.pid ());
7701 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
7705 breakpoint_hit_catch_fork (const struct bp_location
*bl
,
7706 const address_space
*aspace
, CORE_ADDR bp_addr
,
7707 const struct target_waitstatus
*ws
)
7709 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) bl
->owner
;
7711 if (ws
->kind
!= TARGET_WAITKIND_FORKED
)
7714 c
->forked_inferior_pid
= ws
->value
.related_pid
;
7718 /* Implement the "print_it" breakpoint_ops method for fork
7721 static enum print_stop_action
7722 print_it_catch_fork (bpstat bs
)
7724 struct ui_out
*uiout
= current_uiout
;
7725 struct breakpoint
*b
= bs
->breakpoint_at
;
7726 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) bs
->breakpoint_at
;
7728 annotate_catchpoint (b
->number
);
7729 maybe_print_thread_hit_breakpoint (uiout
);
7730 if (b
->disposition
== disp_del
)
7731 uiout
->text ("Temporary catchpoint ");
7733 uiout
->text ("Catchpoint ");
7734 if (uiout
->is_mi_like_p ())
7736 uiout
->field_string ("reason", async_reason_lookup (EXEC_ASYNC_FORK
));
7737 uiout
->field_string ("disp", bpdisp_text (b
->disposition
));
7739 uiout
->field_int ("bkptno", b
->number
);
7740 uiout
->text (" (forked process ");
7741 uiout
->field_int ("newpid", c
->forked_inferior_pid
.pid ());
7742 uiout
->text ("), ");
7743 return PRINT_SRC_AND_LOC
;
7746 /* Implement the "print_one" breakpoint_ops method for fork
7750 print_one_catch_fork (struct breakpoint
*b
, struct bp_location
**last_loc
)
7752 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) b
;
7753 struct value_print_options opts
;
7754 struct ui_out
*uiout
= current_uiout
;
7756 get_user_print_options (&opts
);
7758 /* Field 4, the address, is omitted (which makes the columns not
7759 line up too nicely with the headers, but the effect is relatively
7761 if (opts
.addressprint
)
7762 uiout
->field_skip ("addr");
7764 uiout
->text ("fork");
7765 if (c
->forked_inferior_pid
!= null_ptid
)
7767 uiout
->text (", process ");
7768 uiout
->field_int ("what", c
->forked_inferior_pid
.pid ());
7772 if (uiout
->is_mi_like_p ())
7773 uiout
->field_string ("catch-type", "fork");
7776 /* Implement the "print_mention" breakpoint_ops method for fork
7780 print_mention_catch_fork (struct breakpoint
*b
)
7782 printf_filtered (_("Catchpoint %d (fork)"), b
->number
);
7785 /* Implement the "print_recreate" breakpoint_ops method for fork
7789 print_recreate_catch_fork (struct breakpoint
*b
, struct ui_file
*fp
)
7791 fprintf_unfiltered (fp
, "catch fork");
7792 print_recreate_thread (b
, fp
);
7795 /* The breakpoint_ops structure to be used in fork catchpoints. */
7797 static struct breakpoint_ops catch_fork_breakpoint_ops
;
7799 /* Implement the "insert" breakpoint_ops method for vfork
7803 insert_catch_vfork (struct bp_location
*bl
)
7805 return target_insert_vfork_catchpoint (inferior_ptid
.pid ());
7808 /* Implement the "remove" breakpoint_ops method for vfork
7812 remove_catch_vfork (struct bp_location
*bl
, enum remove_bp_reason reason
)
7814 return target_remove_vfork_catchpoint (inferior_ptid
.pid ());
7817 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
7821 breakpoint_hit_catch_vfork (const struct bp_location
*bl
,
7822 const address_space
*aspace
, CORE_ADDR bp_addr
,
7823 const struct target_waitstatus
*ws
)
7825 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) bl
->owner
;
7827 if (ws
->kind
!= TARGET_WAITKIND_VFORKED
)
7830 c
->forked_inferior_pid
= ws
->value
.related_pid
;
7834 /* Implement the "print_it" breakpoint_ops method for vfork
7837 static enum print_stop_action
7838 print_it_catch_vfork (bpstat bs
)
7840 struct ui_out
*uiout
= current_uiout
;
7841 struct breakpoint
*b
= bs
->breakpoint_at
;
7842 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) b
;
7844 annotate_catchpoint (b
->number
);
7845 maybe_print_thread_hit_breakpoint (uiout
);
7846 if (b
->disposition
== disp_del
)
7847 uiout
->text ("Temporary catchpoint ");
7849 uiout
->text ("Catchpoint ");
7850 if (uiout
->is_mi_like_p ())
7852 uiout
->field_string ("reason", async_reason_lookup (EXEC_ASYNC_VFORK
));
7853 uiout
->field_string ("disp", bpdisp_text (b
->disposition
));
7855 uiout
->field_int ("bkptno", b
->number
);
7856 uiout
->text (" (vforked process ");
7857 uiout
->field_int ("newpid", c
->forked_inferior_pid
.pid ());
7858 uiout
->text ("), ");
7859 return PRINT_SRC_AND_LOC
;
7862 /* Implement the "print_one" breakpoint_ops method for vfork
7866 print_one_catch_vfork (struct breakpoint
*b
, struct bp_location
**last_loc
)
7868 struct fork_catchpoint
*c
= (struct fork_catchpoint
*) b
;
7869 struct value_print_options opts
;
7870 struct ui_out
*uiout
= current_uiout
;
7872 get_user_print_options (&opts
);
7873 /* Field 4, the address, is omitted (which makes the columns not
7874 line up too nicely with the headers, but the effect is relatively
7876 if (opts
.addressprint
)
7877 uiout
->field_skip ("addr");
7879 uiout
->text ("vfork");
7880 if (c
->forked_inferior_pid
!= null_ptid
)
7882 uiout
->text (", process ");
7883 uiout
->field_int ("what", c
->forked_inferior_pid
.pid ());
7887 if (uiout
->is_mi_like_p ())
7888 uiout
->field_string ("catch-type", "vfork");
7891 /* Implement the "print_mention" breakpoint_ops method for vfork
7895 print_mention_catch_vfork (struct breakpoint
*b
)
7897 printf_filtered (_("Catchpoint %d (vfork)"), b
->number
);
7900 /* Implement the "print_recreate" breakpoint_ops method for vfork
7904 print_recreate_catch_vfork (struct breakpoint
*b
, struct ui_file
*fp
)
7906 fprintf_unfiltered (fp
, "catch vfork");
7907 print_recreate_thread (b
, fp
);
7910 /* The breakpoint_ops structure to be used in vfork catchpoints. */
7912 static struct breakpoint_ops catch_vfork_breakpoint_ops
;
7914 /* An instance of this type is used to represent an solib catchpoint.
7915 A breakpoint is really of this type iff its ops pointer points to
7916 CATCH_SOLIB_BREAKPOINT_OPS. */
7918 struct solib_catchpoint
: public breakpoint
7920 ~solib_catchpoint () override
;
7922 /* True for "catch load", false for "catch unload". */
7923 unsigned char is_load
;
7925 /* Regular expression to match, if any. COMPILED is only valid when
7926 REGEX is non-NULL. */
7928 std::unique_ptr
<compiled_regex
> compiled
;
7931 solib_catchpoint::~solib_catchpoint ()
7933 xfree (this->regex
);
7937 insert_catch_solib (struct bp_location
*ignore
)
7943 remove_catch_solib (struct bp_location
*ignore
, enum remove_bp_reason reason
)
7949 breakpoint_hit_catch_solib (const struct bp_location
*bl
,
7950 const address_space
*aspace
,
7952 const struct target_waitstatus
*ws
)
7954 struct solib_catchpoint
*self
= (struct solib_catchpoint
*) bl
->owner
;
7955 struct breakpoint
*other
;
7957 if (ws
->kind
== TARGET_WAITKIND_LOADED
)
7960 ALL_BREAKPOINTS (other
)
7962 struct bp_location
*other_bl
;
7964 if (other
== bl
->owner
)
7967 if (other
->type
!= bp_shlib_event
)
7970 if (self
->pspace
!= NULL
&& other
->pspace
!= self
->pspace
)
7973 for (other_bl
= other
->loc
; other_bl
!= NULL
; other_bl
= other_bl
->next
)
7975 if (other
->ops
->breakpoint_hit (other_bl
, aspace
, bp_addr
, ws
))
7984 check_status_catch_solib (struct bpstats
*bs
)
7986 struct solib_catchpoint
*self
7987 = (struct solib_catchpoint
*) bs
->breakpoint_at
;
7991 for (so_list
*iter
: current_program_space
->added_solibs
)
7994 || self
->compiled
->exec (iter
->so_name
, 0, NULL
, 0) == 0)
8000 for (const std::string
&iter
: current_program_space
->deleted_solibs
)
8003 || self
->compiled
->exec (iter
.c_str (), 0, NULL
, 0) == 0)
8009 bs
->print_it
= print_it_noop
;
8012 static enum print_stop_action
8013 print_it_catch_solib (bpstat bs
)
8015 struct breakpoint
*b
= bs
->breakpoint_at
;
8016 struct ui_out
*uiout
= current_uiout
;
8018 annotate_catchpoint (b
->number
);
8019 maybe_print_thread_hit_breakpoint (uiout
);
8020 if (b
->disposition
== disp_del
)
8021 uiout
->text ("Temporary catchpoint ");
8023 uiout
->text ("Catchpoint ");
8024 uiout
->field_int ("bkptno", b
->number
);
8026 if (uiout
->is_mi_like_p ())
8027 uiout
->field_string ("disp", bpdisp_text (b
->disposition
));
8028 print_solib_event (1);
8029 return PRINT_SRC_AND_LOC
;
8033 print_one_catch_solib (struct breakpoint
*b
, struct bp_location
**locs
)
8035 struct solib_catchpoint
*self
= (struct solib_catchpoint
*) b
;
8036 struct value_print_options opts
;
8037 struct ui_out
*uiout
= current_uiout
;
8039 get_user_print_options (&opts
);
8040 /* Field 4, the address, is omitted (which makes the columns not
8041 line up too nicely with the headers, but the effect is relatively
8043 if (opts
.addressprint
)
8046 uiout
->field_skip ("addr");
8054 msg
= string_printf (_("load of library matching %s"), self
->regex
);
8056 msg
= _("load of library");
8061 msg
= string_printf (_("unload of library matching %s"), self
->regex
);
8063 msg
= _("unload of library");
8065 uiout
->field_string ("what", msg
);
8067 if (uiout
->is_mi_like_p ())
8068 uiout
->field_string ("catch-type", self
->is_load
? "load" : "unload");
8072 print_mention_catch_solib (struct breakpoint
*b
)
8074 struct solib_catchpoint
*self
= (struct solib_catchpoint
*) b
;
8076 printf_filtered (_("Catchpoint %d (%s)"), b
->number
,
8077 self
->is_load
? "load" : "unload");
8081 print_recreate_catch_solib (struct breakpoint
*b
, struct ui_file
*fp
)
8083 struct solib_catchpoint
*self
= (struct solib_catchpoint
*) b
;
8085 fprintf_unfiltered (fp
, "%s %s",
8086 b
->disposition
== disp_del
? "tcatch" : "catch",
8087 self
->is_load
? "load" : "unload");
8089 fprintf_unfiltered (fp
, " %s", self
->regex
);
8090 fprintf_unfiltered (fp
, "\n");
8093 static struct breakpoint_ops catch_solib_breakpoint_ops
;
8095 /* Shared helper function (MI and CLI) for creating and installing
8096 a shared object event catchpoint. If IS_LOAD is non-zero then
8097 the events to be caught are load events, otherwise they are
8098 unload events. If IS_TEMP is non-zero the catchpoint is a
8099 temporary one. If ENABLED is non-zero the catchpoint is
8100 created in an enabled state. */
8103 add_solib_catchpoint (const char *arg
, int is_load
, int is_temp
, int enabled
)
8105 struct gdbarch
*gdbarch
= get_current_arch ();
8109 arg
= skip_spaces (arg
);
8111 std::unique_ptr
<solib_catchpoint
> c (new solib_catchpoint ());
8115 c
->compiled
.reset (new compiled_regex (arg
, REG_NOSUB
,
8116 _("Invalid regexp")));
8117 c
->regex
= xstrdup (arg
);
8120 c
->is_load
= is_load
;
8121 init_catchpoint (c
.get (), gdbarch
, is_temp
, NULL
,
8122 &catch_solib_breakpoint_ops
);
8124 c
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
8126 install_breakpoint (0, std::move (c
), 1);
8129 /* A helper function that does all the work for "catch load" and
8133 catch_load_or_unload (const char *arg
, int from_tty
, int is_load
,
8134 struct cmd_list_element
*command
)
8137 const int enabled
= 1;
8139 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
8141 add_solib_catchpoint (arg
, is_load
, tempflag
, enabled
);
8145 catch_load_command_1 (const char *arg
, int from_tty
,
8146 struct cmd_list_element
*command
)
8148 catch_load_or_unload (arg
, from_tty
, 1, command
);
8152 catch_unload_command_1 (const char *arg
, int from_tty
,
8153 struct cmd_list_element
*command
)
8155 catch_load_or_unload (arg
, from_tty
, 0, command
);
8158 /* Initialize a new breakpoint of the bp_catchpoint kind. If TEMPFLAG
8159 is non-zero, then make the breakpoint temporary. If COND_STRING is
8160 not NULL, then store it in the breakpoint. OPS, if not NULL, is
8161 the breakpoint_ops structure associated to the catchpoint. */
8164 init_catchpoint (struct breakpoint
*b
,
8165 struct gdbarch
*gdbarch
, int tempflag
,
8166 const char *cond_string
,
8167 const struct breakpoint_ops
*ops
)
8169 symtab_and_line sal
;
8170 sal
.pspace
= current_program_space
;
8172 init_raw_breakpoint (b
, gdbarch
, sal
, bp_catchpoint
, ops
);
8174 b
->cond_string
= (cond_string
== NULL
) ? NULL
: xstrdup (cond_string
);
8175 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
8179 install_breakpoint (int internal
, std::unique_ptr
<breakpoint
> &&arg
, int update_gll
)
8181 breakpoint
*b
= add_to_breakpoint_chain (std::move (arg
));
8182 set_breakpoint_number (internal
, b
);
8183 if (is_tracepoint (b
))
8184 set_tracepoint_count (breakpoint_count
);
8187 gdb::observers::breakpoint_created
.notify (b
);
8190 update_global_location_list (UGLL_MAY_INSERT
);
8194 create_fork_vfork_event_catchpoint (struct gdbarch
*gdbarch
,
8195 int tempflag
, const char *cond_string
,
8196 const struct breakpoint_ops
*ops
)
8198 std::unique_ptr
<fork_catchpoint
> c (new fork_catchpoint ());
8200 init_catchpoint (c
.get (), gdbarch
, tempflag
, cond_string
, ops
);
8202 c
->forked_inferior_pid
= null_ptid
;
8204 install_breakpoint (0, std::move (c
), 1);
8207 /* Exec catchpoints. */
8209 /* An instance of this type is used to represent an exec catchpoint.
8210 A breakpoint is really of this type iff its ops pointer points to
8211 CATCH_EXEC_BREAKPOINT_OPS. */
8213 struct exec_catchpoint
: public breakpoint
8215 ~exec_catchpoint () override
;
8217 /* Filename of a program whose exec triggered this catchpoint.
8218 This field is only valid immediately after this catchpoint has
8220 char *exec_pathname
;
8223 /* Exec catchpoint destructor. */
8225 exec_catchpoint::~exec_catchpoint ()
8227 xfree (this->exec_pathname
);
8231 insert_catch_exec (struct bp_location
*bl
)
8233 return target_insert_exec_catchpoint (inferior_ptid
.pid ());
8237 remove_catch_exec (struct bp_location
*bl
, enum remove_bp_reason reason
)
8239 return target_remove_exec_catchpoint (inferior_ptid
.pid ());
8243 breakpoint_hit_catch_exec (const struct bp_location
*bl
,
8244 const address_space
*aspace
, CORE_ADDR bp_addr
,
8245 const struct target_waitstatus
*ws
)
8247 struct exec_catchpoint
*c
= (struct exec_catchpoint
*) bl
->owner
;
8249 if (ws
->kind
!= TARGET_WAITKIND_EXECD
)
8252 c
->exec_pathname
= xstrdup (ws
->value
.execd_pathname
);
8256 static enum print_stop_action
8257 print_it_catch_exec (bpstat bs
)
8259 struct ui_out
*uiout
= current_uiout
;
8260 struct breakpoint
*b
= bs
->breakpoint_at
;
8261 struct exec_catchpoint
*c
= (struct exec_catchpoint
*) b
;
8263 annotate_catchpoint (b
->number
);
8264 maybe_print_thread_hit_breakpoint (uiout
);
8265 if (b
->disposition
== disp_del
)
8266 uiout
->text ("Temporary catchpoint ");
8268 uiout
->text ("Catchpoint ");
8269 if (uiout
->is_mi_like_p ())
8271 uiout
->field_string ("reason", async_reason_lookup (EXEC_ASYNC_EXEC
));
8272 uiout
->field_string ("disp", bpdisp_text (b
->disposition
));
8274 uiout
->field_int ("bkptno", b
->number
);
8275 uiout
->text (" (exec'd ");
8276 uiout
->field_string ("new-exec", c
->exec_pathname
);
8277 uiout
->text ("), ");
8279 return PRINT_SRC_AND_LOC
;
8283 print_one_catch_exec (struct breakpoint
*b
, struct bp_location
**last_loc
)
8285 struct exec_catchpoint
*c
= (struct exec_catchpoint
*) b
;
8286 struct value_print_options opts
;
8287 struct ui_out
*uiout
= current_uiout
;
8289 get_user_print_options (&opts
);
8291 /* Field 4, the address, is omitted (which makes the columns
8292 not line up too nicely with the headers, but the effect
8293 is relatively readable). */
8294 if (opts
.addressprint
)
8295 uiout
->field_skip ("addr");
8297 uiout
->text ("exec");
8298 if (c
->exec_pathname
!= NULL
)
8300 uiout
->text (", program \"");
8301 uiout
->field_string ("what", c
->exec_pathname
);
8302 uiout
->text ("\" ");
8305 if (uiout
->is_mi_like_p ())
8306 uiout
->field_string ("catch-type", "exec");
8310 print_mention_catch_exec (struct breakpoint
*b
)
8312 printf_filtered (_("Catchpoint %d (exec)"), b
->number
);
8315 /* Implement the "print_recreate" breakpoint_ops method for exec
8319 print_recreate_catch_exec (struct breakpoint
*b
, struct ui_file
*fp
)
8321 fprintf_unfiltered (fp
, "catch exec");
8322 print_recreate_thread (b
, fp
);
8325 static struct breakpoint_ops catch_exec_breakpoint_ops
;
8328 hw_breakpoint_used_count (void)
8331 struct breakpoint
*b
;
8332 struct bp_location
*bl
;
8336 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
8337 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
8339 /* Special types of hardware breakpoints may use more than
8341 i
+= b
->ops
->resources_needed (bl
);
8348 /* Returns the resources B would use if it were a hardware
8352 hw_watchpoint_use_count (struct breakpoint
*b
)
8355 struct bp_location
*bl
;
8357 if (!breakpoint_enabled (b
))
8360 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
8362 /* Special types of hardware watchpoints may use more than
8364 i
+= b
->ops
->resources_needed (bl
);
8370 /* Returns the sum the used resources of all hardware watchpoints of
8371 type TYPE in the breakpoints list. Also returns in OTHER_TYPE_USED
8372 the sum of the used resources of all hardware watchpoints of other
8373 types _not_ TYPE. */
8376 hw_watchpoint_used_count_others (struct breakpoint
*except
,
8377 enum bptype type
, int *other_type_used
)
8380 struct breakpoint
*b
;
8382 *other_type_used
= 0;
8387 if (!breakpoint_enabled (b
))
8390 if (b
->type
== type
)
8391 i
+= hw_watchpoint_use_count (b
);
8392 else if (is_hardware_watchpoint (b
))
8393 *other_type_used
= 1;
8400 disable_watchpoints_before_interactive_call_start (void)
8402 struct breakpoint
*b
;
8406 if (is_watchpoint (b
) && breakpoint_enabled (b
))
8408 b
->enable_state
= bp_call_disabled
;
8409 update_global_location_list (UGLL_DONT_INSERT
);
8415 enable_watchpoints_after_interactive_call_stop (void)
8417 struct breakpoint
*b
;
8421 if (is_watchpoint (b
) && b
->enable_state
== bp_call_disabled
)
8423 b
->enable_state
= bp_enabled
;
8424 update_global_location_list (UGLL_MAY_INSERT
);
8430 disable_breakpoints_before_startup (void)
8432 current_program_space
->executing_startup
= 1;
8433 update_global_location_list (UGLL_DONT_INSERT
);
8437 enable_breakpoints_after_startup (void)
8439 current_program_space
->executing_startup
= 0;
8440 breakpoint_re_set ();
8443 /* Create a new single-step breakpoint for thread THREAD, with no
8446 static struct breakpoint
*
8447 new_single_step_breakpoint (int thread
, struct gdbarch
*gdbarch
)
8449 std::unique_ptr
<breakpoint
> b (new breakpoint ());
8451 init_raw_breakpoint_without_location (b
.get (), gdbarch
, bp_single_step
,
8452 &momentary_breakpoint_ops
);
8454 b
->disposition
= disp_donttouch
;
8455 b
->frame_id
= null_frame_id
;
8458 gdb_assert (b
->thread
!= 0);
8460 return add_to_breakpoint_chain (std::move (b
));
8463 /* Set a momentary breakpoint of type TYPE at address specified by
8464 SAL. If FRAME_ID is valid, the breakpoint is restricted to that
8468 set_momentary_breakpoint (struct gdbarch
*gdbarch
, struct symtab_and_line sal
,
8469 struct frame_id frame_id
, enum bptype type
)
8471 struct breakpoint
*b
;
8473 /* If FRAME_ID is valid, it should be a real frame, not an inlined or
8475 gdb_assert (!frame_id_artificial_p (frame_id
));
8477 b
= set_raw_breakpoint (gdbarch
, sal
, type
, &momentary_breakpoint_ops
);
8478 b
->enable_state
= bp_enabled
;
8479 b
->disposition
= disp_donttouch
;
8480 b
->frame_id
= frame_id
;
8482 b
->thread
= inferior_thread ()->global_num
;
8484 update_global_location_list_nothrow (UGLL_MAY_INSERT
);
8486 return breakpoint_up (b
);
8489 /* Make a momentary breakpoint based on the master breakpoint ORIG.
8490 The new breakpoint will have type TYPE, use OPS as its
8491 breakpoint_ops, and will set enabled to LOC_ENABLED. */
8493 static struct breakpoint
*
8494 momentary_breakpoint_from_master (struct breakpoint
*orig
,
8496 const struct breakpoint_ops
*ops
,
8499 struct breakpoint
*copy
;
8501 copy
= set_raw_breakpoint_without_location (orig
->gdbarch
, type
, ops
);
8502 copy
->loc
= allocate_bp_location (copy
);
8503 set_breakpoint_location_function (copy
->loc
, 1);
8505 copy
->loc
->gdbarch
= orig
->loc
->gdbarch
;
8506 copy
->loc
->requested_address
= orig
->loc
->requested_address
;
8507 copy
->loc
->address
= orig
->loc
->address
;
8508 copy
->loc
->section
= orig
->loc
->section
;
8509 copy
->loc
->pspace
= orig
->loc
->pspace
;
8510 copy
->loc
->probe
= orig
->loc
->probe
;
8511 copy
->loc
->line_number
= orig
->loc
->line_number
;
8512 copy
->loc
->symtab
= orig
->loc
->symtab
;
8513 copy
->loc
->enabled
= loc_enabled
;
8514 copy
->frame_id
= orig
->frame_id
;
8515 copy
->thread
= orig
->thread
;
8516 copy
->pspace
= orig
->pspace
;
8518 copy
->enable_state
= bp_enabled
;
8519 copy
->disposition
= disp_donttouch
;
8520 copy
->number
= internal_breakpoint_number
--;
8522 update_global_location_list_nothrow (UGLL_DONT_INSERT
);
8526 /* Make a deep copy of momentary breakpoint ORIG. Returns NULL if
8530 clone_momentary_breakpoint (struct breakpoint
*orig
)
8532 /* If there's nothing to clone, then return nothing. */
8536 return momentary_breakpoint_from_master (orig
, orig
->type
, orig
->ops
, 0);
8540 set_momentary_breakpoint_at_pc (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
8543 struct symtab_and_line sal
;
8545 sal
= find_pc_line (pc
, 0);
8547 sal
.section
= find_pc_overlay (pc
);
8548 sal
.explicit_pc
= 1;
8550 return set_momentary_breakpoint (gdbarch
, sal
, null_frame_id
, type
);
8554 /* Tell the user we have just set a breakpoint B. */
8557 mention (struct breakpoint
*b
)
8559 b
->ops
->print_mention (b
);
8560 current_uiout
->text ("\n");
8564 static int bp_loc_is_permanent (struct bp_location
*loc
);
8566 static struct bp_location
*
8567 add_location_to_breakpoint (struct breakpoint
*b
,
8568 const struct symtab_and_line
*sal
)
8570 struct bp_location
*loc
, **tmp
;
8571 CORE_ADDR adjusted_address
;
8572 struct gdbarch
*loc_gdbarch
= get_sal_arch (*sal
);
8574 if (loc_gdbarch
== NULL
)
8575 loc_gdbarch
= b
->gdbarch
;
8577 /* Adjust the breakpoint's address prior to allocating a location.
8578 Once we call allocate_bp_location(), that mostly uninitialized
8579 location will be placed on the location chain. Adjustment of the
8580 breakpoint may cause target_read_memory() to be called and we do
8581 not want its scan of the location chain to find a breakpoint and
8582 location that's only been partially initialized. */
8583 adjusted_address
= adjust_breakpoint_address (loc_gdbarch
,
8586 /* Sort the locations by their ADDRESS. */
8587 loc
= allocate_bp_location (b
);
8588 for (tmp
= &(b
->loc
); *tmp
!= NULL
&& (*tmp
)->address
<= adjusted_address
;
8589 tmp
= &((*tmp
)->next
))
8594 loc
->requested_address
= sal
->pc
;
8595 loc
->address
= adjusted_address
;
8596 loc
->pspace
= sal
->pspace
;
8597 loc
->probe
.prob
= sal
->prob
;
8598 loc
->probe
.objfile
= sal
->objfile
;
8599 gdb_assert (loc
->pspace
!= NULL
);
8600 loc
->section
= sal
->section
;
8601 loc
->gdbarch
= loc_gdbarch
;
8602 loc
->line_number
= sal
->line
;
8603 loc
->symtab
= sal
->symtab
;
8604 loc
->symbol
= sal
->symbol
;
8605 loc
->msymbol
= sal
->msymbol
;
8606 loc
->objfile
= sal
->objfile
;
8608 set_breakpoint_location_function (loc
,
8609 sal
->explicit_pc
|| sal
->explicit_line
);
8611 /* While by definition, permanent breakpoints are already present in the
8612 code, we don't mark the location as inserted. Normally one would expect
8613 that GDB could rely on that breakpoint instruction to stop the program,
8614 thus removing the need to insert its own breakpoint, except that executing
8615 the breakpoint instruction can kill the target instead of reporting a
8616 SIGTRAP. E.g., on SPARC, when interrupts are disabled, executing the
8617 instruction resets the CPU, so QEMU 2.0.0 for SPARC correspondingly dies
8618 with "Trap 0x02 while interrupts disabled, Error state". Letting the
8619 breakpoint be inserted normally results in QEMU knowing about the GDB
8620 breakpoint, and thus trap before the breakpoint instruction is executed.
8621 (If GDB later needs to continue execution past the permanent breakpoint,
8622 it manually increments the PC, thus avoiding executing the breakpoint
8624 if (bp_loc_is_permanent (loc
))
8631 /* See breakpoint.h. */
8634 program_breakpoint_here_p (struct gdbarch
*gdbarch
, CORE_ADDR address
)
8638 const gdb_byte
*bpoint
;
8639 gdb_byte
*target_mem
;
8642 bpoint
= gdbarch_breakpoint_from_pc (gdbarch
, &addr
, &len
);
8644 /* Software breakpoints unsupported? */
8648 target_mem
= (gdb_byte
*) alloca (len
);
8650 /* Enable the automatic memory restoration from breakpoints while
8651 we read the memory. Otherwise we could say about our temporary
8652 breakpoints they are permanent. */
8653 scoped_restore restore_memory
8654 = make_scoped_restore_show_memory_breakpoints (0);
8656 if (target_read_memory (address
, target_mem
, len
) == 0
8657 && memcmp (target_mem
, bpoint
, len
) == 0)
8663 /* Return 1 if LOC is pointing to a permanent breakpoint,
8664 return 0 otherwise. */
8667 bp_loc_is_permanent (struct bp_location
*loc
)
8669 gdb_assert (loc
!= NULL
);
8671 /* If we have a catchpoint or a watchpoint, just return 0. We should not
8672 attempt to read from the addresses the locations of these breakpoint types
8673 point to. program_breakpoint_here_p, below, will attempt to read
8675 if (!breakpoint_address_is_meaningful (loc
->owner
))
8678 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
8679 switch_to_program_space_and_thread (loc
->pspace
);
8680 return program_breakpoint_here_p (loc
->gdbarch
, loc
->address
);
8683 /* Build a command list for the dprintf corresponding to the current
8684 settings of the dprintf style options. */
8687 update_dprintf_command_list (struct breakpoint
*b
)
8689 char *dprintf_args
= b
->extra_string
;
8690 char *printf_line
= NULL
;
8695 dprintf_args
= skip_spaces (dprintf_args
);
8697 /* Allow a comma, as it may have terminated a location, but don't
8699 if (*dprintf_args
== ',')
8701 dprintf_args
= skip_spaces (dprintf_args
);
8703 if (*dprintf_args
!= '"')
8704 error (_("Bad format string, missing '\"'."));
8706 if (strcmp (dprintf_style
, dprintf_style_gdb
) == 0)
8707 printf_line
= xstrprintf ("printf %s", dprintf_args
);
8708 else if (strcmp (dprintf_style
, dprintf_style_call
) == 0)
8710 if (!dprintf_function
)
8711 error (_("No function supplied for dprintf call"));
8713 if (dprintf_channel
&& strlen (dprintf_channel
) > 0)
8714 printf_line
= xstrprintf ("call (void) %s (%s,%s)",
8719 printf_line
= xstrprintf ("call (void) %s (%s)",
8723 else if (strcmp (dprintf_style
, dprintf_style_agent
) == 0)
8725 if (target_can_run_breakpoint_commands ())
8726 printf_line
= xstrprintf ("agent-printf %s", dprintf_args
);
8729 warning (_("Target cannot run dprintf commands, falling back to GDB printf"));
8730 printf_line
= xstrprintf ("printf %s", dprintf_args
);
8734 internal_error (__FILE__
, __LINE__
,
8735 _("Invalid dprintf style."));
8737 gdb_assert (printf_line
!= NULL
);
8739 /* Manufacture a printf sequence. */
8740 struct command_line
*printf_cmd_line
8741 = new struct command_line (simple_control
, printf_line
);
8742 breakpoint_set_commands (b
, counted_command_line (printf_cmd_line
,
8743 command_lines_deleter ()));
8746 /* Update all dprintf commands, making their command lists reflect
8747 current style settings. */
8750 update_dprintf_commands (const char *args
, int from_tty
,
8751 struct cmd_list_element
*c
)
8753 struct breakpoint
*b
;
8757 if (b
->type
== bp_dprintf
)
8758 update_dprintf_command_list (b
);
8762 /* Create a breakpoint with SAL as location. Use LOCATION
8763 as a description of the location, and COND_STRING
8764 as condition expression. If LOCATION is NULL then create an
8765 "address location" from the address in the SAL. */
8768 init_breakpoint_sal (struct breakpoint
*b
, struct gdbarch
*gdbarch
,
8769 gdb::array_view
<const symtab_and_line
> sals
,
8770 event_location_up
&&location
,
8771 gdb::unique_xmalloc_ptr
<char> filter
,
8772 gdb::unique_xmalloc_ptr
<char> cond_string
,
8773 gdb::unique_xmalloc_ptr
<char> extra_string
,
8774 enum bptype type
, enum bpdisp disposition
,
8775 int thread
, int task
, int ignore_count
,
8776 const struct breakpoint_ops
*ops
, int from_tty
,
8777 int enabled
, int internal
, unsigned flags
,
8778 int display_canonical
)
8782 if (type
== bp_hardware_breakpoint
)
8784 int target_resources_ok
;
8786 i
= hw_breakpoint_used_count ();
8787 target_resources_ok
=
8788 target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
8790 if (target_resources_ok
== 0)
8791 error (_("No hardware breakpoint support in the target."));
8792 else if (target_resources_ok
< 0)
8793 error (_("Hardware breakpoints used exceeds limit."));
8796 gdb_assert (!sals
.empty ());
8798 for (const auto &sal
: sals
)
8800 struct bp_location
*loc
;
8804 struct gdbarch
*loc_gdbarch
= get_sal_arch (sal
);
8806 loc_gdbarch
= gdbarch
;
8808 describe_other_breakpoints (loc_gdbarch
,
8809 sal
.pspace
, sal
.pc
, sal
.section
, thread
);
8812 if (&sal
== &sals
[0])
8814 init_raw_breakpoint (b
, gdbarch
, sal
, type
, ops
);
8818 b
->cond_string
= cond_string
.release ();
8819 b
->extra_string
= extra_string
.release ();
8820 b
->ignore_count
= ignore_count
;
8821 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
8822 b
->disposition
= disposition
;
8824 if ((flags
& CREATE_BREAKPOINT_FLAGS_INSERTED
) != 0)
8825 b
->loc
->inserted
= 1;
8827 if (type
== bp_static_tracepoint
)
8829 struct tracepoint
*t
= (struct tracepoint
*) b
;
8830 struct static_tracepoint_marker marker
;
8832 if (strace_marker_p (b
))
8834 /* We already know the marker exists, otherwise, we
8835 wouldn't see a sal for it. */
8837 = &event_location_to_string (b
->location
.get ())[3];
8840 p
= skip_spaces (p
);
8842 endp
= skip_to_space (p
);
8844 t
->static_trace_marker_id
.assign (p
, endp
- p
);
8846 printf_filtered (_("Probed static tracepoint "
8848 t
->static_trace_marker_id
.c_str ());
8850 else if (target_static_tracepoint_marker_at (sal
.pc
, &marker
))
8852 t
->static_trace_marker_id
= std::move (marker
.str_id
);
8854 printf_filtered (_("Probed static tracepoint "
8856 t
->static_trace_marker_id
.c_str ());
8859 warning (_("Couldn't determine the static "
8860 "tracepoint marker to probe"));
8867 loc
= add_location_to_breakpoint (b
, &sal
);
8868 if ((flags
& CREATE_BREAKPOINT_FLAGS_INSERTED
) != 0)
8874 const char *arg
= b
->cond_string
;
8876 loc
->cond
= parse_exp_1 (&arg
, loc
->address
,
8877 block_for_pc (loc
->address
), 0);
8879 error (_("Garbage '%s' follows condition"), arg
);
8882 /* Dynamic printf requires and uses additional arguments on the
8883 command line, otherwise it's an error. */
8884 if (type
== bp_dprintf
)
8886 if (b
->extra_string
)
8887 update_dprintf_command_list (b
);
8889 error (_("Format string required"));
8891 else if (b
->extra_string
)
8892 error (_("Garbage '%s' at end of command"), b
->extra_string
);
8895 b
->display_canonical
= display_canonical
;
8896 if (location
!= NULL
)
8897 b
->location
= std::move (location
);
8899 b
->location
= new_address_location (b
->loc
->address
, NULL
, 0);
8900 b
->filter
= filter
.release ();
8904 create_breakpoint_sal (struct gdbarch
*gdbarch
,
8905 gdb::array_view
<const symtab_and_line
> sals
,
8906 event_location_up
&&location
,
8907 gdb::unique_xmalloc_ptr
<char> filter
,
8908 gdb::unique_xmalloc_ptr
<char> cond_string
,
8909 gdb::unique_xmalloc_ptr
<char> extra_string
,
8910 enum bptype type
, enum bpdisp disposition
,
8911 int thread
, int task
, int ignore_count
,
8912 const struct breakpoint_ops
*ops
, int from_tty
,
8913 int enabled
, int internal
, unsigned flags
,
8914 int display_canonical
)
8916 std::unique_ptr
<breakpoint
> b
= new_breakpoint_from_type (type
);
8918 init_breakpoint_sal (b
.get (), gdbarch
,
8919 sals
, std::move (location
),
8921 std::move (cond_string
),
8922 std::move (extra_string
),
8924 thread
, task
, ignore_count
,
8926 enabled
, internal
, flags
,
8929 install_breakpoint (internal
, std::move (b
), 0);
8932 /* Add SALS.nelts breakpoints to the breakpoint table. For each
8933 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
8934 value. COND_STRING, if not NULL, specified the condition to be
8935 used for all breakpoints. Essentially the only case where
8936 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
8937 function. In that case, it's still not possible to specify
8938 separate conditions for different overloaded functions, so
8939 we take just a single condition string.
8941 NOTE: If the function succeeds, the caller is expected to cleanup
8942 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
8943 array contents). If the function fails (error() is called), the
8944 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
8945 COND and SALS arrays and each of those arrays contents. */
8948 create_breakpoints_sal (struct gdbarch
*gdbarch
,
8949 struct linespec_result
*canonical
,
8950 gdb::unique_xmalloc_ptr
<char> cond_string
,
8951 gdb::unique_xmalloc_ptr
<char> extra_string
,
8952 enum bptype type
, enum bpdisp disposition
,
8953 int thread
, int task
, int ignore_count
,
8954 const struct breakpoint_ops
*ops
, int from_tty
,
8955 int enabled
, int internal
, unsigned flags
)
8957 if (canonical
->pre_expanded
)
8958 gdb_assert (canonical
->lsals
.size () == 1);
8960 for (const auto &lsal
: canonical
->lsals
)
8962 /* Note that 'location' can be NULL in the case of a plain
8963 'break', without arguments. */
8964 event_location_up location
8965 = (canonical
->location
!= NULL
8966 ? copy_event_location (canonical
->location
.get ()) : NULL
);
8967 gdb::unique_xmalloc_ptr
<char> filter_string
8968 (lsal
.canonical
!= NULL
? xstrdup (lsal
.canonical
) : NULL
);
8970 create_breakpoint_sal (gdbarch
, lsal
.sals
,
8971 std::move (location
),
8972 std::move (filter_string
),
8973 std::move (cond_string
),
8974 std::move (extra_string
),
8976 thread
, task
, ignore_count
, ops
,
8977 from_tty
, enabled
, internal
, flags
,
8978 canonical
->special_display
);
8982 /* Parse LOCATION which is assumed to be a SAL specification possibly
8983 followed by conditionals. On return, SALS contains an array of SAL
8984 addresses found. LOCATION points to the end of the SAL (for
8985 linespec locations).
8987 The array and the line spec strings are allocated on the heap, it is
8988 the caller's responsibility to free them. */
8991 parse_breakpoint_sals (const struct event_location
*location
,
8992 struct linespec_result
*canonical
)
8994 struct symtab_and_line cursal
;
8996 if (event_location_type (location
) == LINESPEC_LOCATION
)
8998 const char *spec
= get_linespec_location (location
)->spec_string
;
9002 /* The last displayed codepoint, if it's valid, is our default
9003 breakpoint address. */
9004 if (last_displayed_sal_is_valid ())
9006 /* Set sal's pspace, pc, symtab, and line to the values
9007 corresponding to the last call to print_frame_info.
9008 Be sure to reinitialize LINE with NOTCURRENT == 0
9009 as the breakpoint line number is inappropriate otherwise.
9010 find_pc_line would adjust PC, re-set it back. */
9011 symtab_and_line sal
= get_last_displayed_sal ();
9012 CORE_ADDR pc
= sal
.pc
;
9014 sal
= find_pc_line (pc
, 0);
9016 /* "break" without arguments is equivalent to "break *PC"
9017 where PC is the last displayed codepoint's address. So
9018 make sure to set sal.explicit_pc to prevent GDB from
9019 trying to expand the list of sals to include all other
9020 instances with the same symtab and line. */
9022 sal
.explicit_pc
= 1;
9024 struct linespec_sals lsal
;
9026 lsal
.canonical
= NULL
;
9028 canonical
->lsals
.push_back (std::move (lsal
));
9032 error (_("No default breakpoint address now."));
9036 /* Force almost all breakpoints to be in terms of the
9037 current_source_symtab (which is decode_line_1's default).
9038 This should produce the results we want almost all of the
9039 time while leaving default_breakpoint_* alone.
9041 ObjC: However, don't match an Objective-C method name which
9042 may have a '+' or '-' succeeded by a '['. */
9043 cursal
= get_current_source_symtab_and_line ();
9044 if (last_displayed_sal_is_valid ())
9046 const char *spec
= NULL
;
9048 if (event_location_type (location
) == LINESPEC_LOCATION
)
9049 spec
= get_linespec_location (location
)->spec_string
;
9053 && strchr ("+-", spec
[0]) != NULL
9056 decode_line_full (location
, DECODE_LINE_FUNFIRSTLINE
, NULL
,
9057 get_last_displayed_symtab (),
9058 get_last_displayed_line (),
9059 canonical
, NULL
, NULL
);
9064 decode_line_full (location
, DECODE_LINE_FUNFIRSTLINE
, NULL
,
9065 cursal
.symtab
, cursal
.line
, canonical
, NULL
, NULL
);
9069 /* Convert each SAL into a real PC. Verify that the PC can be
9070 inserted as a breakpoint. If it can't throw an error. */
9073 breakpoint_sals_to_pc (std::vector
<symtab_and_line
> &sals
)
9075 for (auto &sal
: sals
)
9076 resolve_sal_pc (&sal
);
9079 /* Fast tracepoints may have restrictions on valid locations. For
9080 instance, a fast tracepoint using a jump instead of a trap will
9081 likely have to overwrite more bytes than a trap would, and so can
9082 only be placed where the instruction is longer than the jump, or a
9083 multi-instruction sequence does not have a jump into the middle of
9087 check_fast_tracepoint_sals (struct gdbarch
*gdbarch
,
9088 gdb::array_view
<const symtab_and_line
> sals
)
9090 for (const auto &sal
: sals
)
9092 struct gdbarch
*sarch
;
9094 sarch
= get_sal_arch (sal
);
9095 /* We fall back to GDBARCH if there is no architecture
9096 associated with SAL. */
9100 if (!gdbarch_fast_tracepoint_valid_at (sarch
, sal
.pc
, &msg
))
9101 error (_("May not have a fast tracepoint at %s%s"),
9102 paddress (sarch
, sal
.pc
), msg
.c_str ());
9106 /* Given TOK, a string specification of condition and thread, as
9107 accepted by the 'break' command, extract the condition
9108 string and thread number and set *COND_STRING and *THREAD.
9109 PC identifies the context at which the condition should be parsed.
9110 If no condition is found, *COND_STRING is set to NULL.
9111 If no thread is found, *THREAD is set to -1. */
9114 find_condition_and_thread (const char *tok
, CORE_ADDR pc
,
9115 char **cond_string
, int *thread
, int *task
,
9118 *cond_string
= NULL
;
9125 const char *end_tok
;
9127 const char *cond_start
= NULL
;
9128 const char *cond_end
= NULL
;
9130 tok
= skip_spaces (tok
);
9132 if ((*tok
== '"' || *tok
== ',') && rest
)
9134 *rest
= savestring (tok
, strlen (tok
));
9138 end_tok
= skip_to_space (tok
);
9140 toklen
= end_tok
- tok
;
9142 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
9144 tok
= cond_start
= end_tok
+ 1;
9145 parse_exp_1 (&tok
, pc
, block_for_pc (pc
), 0);
9147 *cond_string
= savestring (cond_start
, cond_end
- cond_start
);
9149 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
9152 struct thread_info
*thr
;
9155 thr
= parse_thread_id (tok
, &tmptok
);
9157 error (_("Junk after thread keyword."));
9158 *thread
= thr
->global_num
;
9161 else if (toklen
>= 1 && strncmp (tok
, "task", toklen
) == 0)
9166 *task
= strtol (tok
, &tmptok
, 0);
9168 error (_("Junk after task keyword."));
9169 if (!valid_task_id (*task
))
9170 error (_("Unknown task %d."), *task
);
9175 *rest
= savestring (tok
, strlen (tok
));
9179 error (_("Junk at end of arguments."));
9183 /* Decode a static tracepoint marker spec. */
9185 static std::vector
<symtab_and_line
>
9186 decode_static_tracepoint_spec (const char **arg_p
)
9188 const char *p
= &(*arg_p
)[3];
9191 p
= skip_spaces (p
);
9193 endp
= skip_to_space (p
);
9195 std::string
marker_str (p
, endp
- p
);
9197 std::vector
<static_tracepoint_marker
> markers
9198 = target_static_tracepoint_markers_by_strid (marker_str
.c_str ());
9199 if (markers
.empty ())
9200 error (_("No known static tracepoint marker named %s"),
9201 marker_str
.c_str ());
9203 std::vector
<symtab_and_line
> sals
;
9204 sals
.reserve (markers
.size ());
9206 for (const static_tracepoint_marker
&marker
: markers
)
9208 symtab_and_line sal
= find_pc_line (marker
.address
, 0);
9209 sal
.pc
= marker
.address
;
9210 sals
.push_back (sal
);
9217 /* See breakpoint.h. */
9220 create_breakpoint (struct gdbarch
*gdbarch
,
9221 const struct event_location
*location
,
9222 const char *cond_string
,
9223 int thread
, const char *extra_string
,
9225 int tempflag
, enum bptype type_wanted
,
9227 enum auto_boolean pending_break_support
,
9228 const struct breakpoint_ops
*ops
,
9229 int from_tty
, int enabled
, int internal
,
9232 struct linespec_result canonical
;
9235 int prev_bkpt_count
= breakpoint_count
;
9237 gdb_assert (ops
!= NULL
);
9239 /* If extra_string isn't useful, set it to NULL. */
9240 if (extra_string
!= NULL
&& *extra_string
== '\0')
9241 extra_string
= NULL
;
9245 ops
->create_sals_from_location (location
, &canonical
, type_wanted
);
9247 CATCH (e
, RETURN_MASK_ERROR
)
9249 /* If caller is interested in rc value from parse, set
9251 if (e
.error
== NOT_FOUND_ERROR
)
9253 /* If pending breakpoint support is turned off, throw
9256 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
9257 throw_exception (e
);
9259 exception_print (gdb_stderr
, e
);
9261 /* If pending breakpoint support is auto query and the user
9262 selects no, then simply return the error code. */
9263 if (pending_break_support
== AUTO_BOOLEAN_AUTO
9264 && !nquery (_("Make %s pending on future shared library load? "),
9265 bptype_string (type_wanted
)))
9268 /* At this point, either the user was queried about setting
9269 a pending breakpoint and selected yes, or pending
9270 breakpoint behavior is on and thus a pending breakpoint
9271 is defaulted on behalf of the user. */
9275 throw_exception (e
);
9279 if (!pending
&& canonical
.lsals
.empty ())
9282 /* Resolve all line numbers to PC's and verify that the addresses
9283 are ok for the target. */
9286 for (auto &lsal
: canonical
.lsals
)
9287 breakpoint_sals_to_pc (lsal
.sals
);
9290 /* Fast tracepoints may have additional restrictions on location. */
9291 if (!pending
&& type_wanted
== bp_fast_tracepoint
)
9293 for (const auto &lsal
: canonical
.lsals
)
9294 check_fast_tracepoint_sals (gdbarch
, lsal
.sals
);
9297 /* Verify that condition can be parsed, before setting any
9298 breakpoints. Allocate a separate condition expression for each
9302 gdb::unique_xmalloc_ptr
<char> cond_string_copy
;
9303 gdb::unique_xmalloc_ptr
<char> extra_string_copy
;
9310 const linespec_sals
&lsal
= canonical
.lsals
[0];
9312 /* Here we only parse 'arg' to separate condition
9313 from thread number, so parsing in context of first
9314 sal is OK. When setting the breakpoint we'll
9315 re-parse it in context of each sal. */
9317 find_condition_and_thread (extra_string
, lsal
.sals
[0].pc
,
9318 &cond
, &thread
, &task
, &rest
);
9319 cond_string_copy
.reset (cond
);
9320 extra_string_copy
.reset (rest
);
9324 if (type_wanted
!= bp_dprintf
9325 && extra_string
!= NULL
&& *extra_string
!= '\0')
9326 error (_("Garbage '%s' at end of location"), extra_string
);
9328 /* Create a private copy of condition string. */
9330 cond_string_copy
.reset (xstrdup (cond_string
));
9331 /* Create a private copy of any extra string. */
9333 extra_string_copy
.reset (xstrdup (extra_string
));
9336 ops
->create_breakpoints_sal (gdbarch
, &canonical
,
9337 std::move (cond_string_copy
),
9338 std::move (extra_string_copy
),
9340 tempflag
? disp_del
: disp_donttouch
,
9341 thread
, task
, ignore_count
, ops
,
9342 from_tty
, enabled
, internal
, flags
);
9346 std::unique_ptr
<breakpoint
> b
= new_breakpoint_from_type (type_wanted
);
9348 init_raw_breakpoint_without_location (b
.get (), gdbarch
, type_wanted
, ops
);
9349 b
->location
= copy_event_location (location
);
9352 b
->cond_string
= NULL
;
9355 /* Create a private copy of condition string. */
9356 b
->cond_string
= cond_string
!= NULL
? xstrdup (cond_string
) : NULL
;
9360 /* Create a private copy of any extra string. */
9361 b
->extra_string
= extra_string
!= NULL
? xstrdup (extra_string
) : NULL
;
9362 b
->ignore_count
= ignore_count
;
9363 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
9364 b
->condition_not_parsed
= 1;
9365 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
9366 if ((type_wanted
!= bp_breakpoint
9367 && type_wanted
!= bp_hardware_breakpoint
) || thread
!= -1)
9368 b
->pspace
= current_program_space
;
9370 install_breakpoint (internal
, std::move (b
), 0);
9373 if (canonical
.lsals
.size () > 1)
9375 warning (_("Multiple breakpoints were set.\nUse the "
9376 "\"delete\" command to delete unwanted breakpoints."));
9377 prev_breakpoint_count
= prev_bkpt_count
;
9380 update_global_location_list (UGLL_MAY_INSERT
);
9385 /* Set a breakpoint.
9386 ARG is a string describing breakpoint address,
9387 condition, and thread.
9388 FLAG specifies if a breakpoint is hardware on,
9389 and if breakpoint is temporary, using BP_HARDWARE_FLAG
9393 break_command_1 (const char *arg
, int flag
, int from_tty
)
9395 int tempflag
= flag
& BP_TEMPFLAG
;
9396 enum bptype type_wanted
= (flag
& BP_HARDWAREFLAG
9397 ? bp_hardware_breakpoint
9399 struct breakpoint_ops
*ops
;
9401 event_location_up location
= string_to_event_location (&arg
, current_language
);
9403 /* Matching breakpoints on probes. */
9404 if (location
!= NULL
9405 && event_location_type (location
.get ()) == PROBE_LOCATION
)
9406 ops
= &bkpt_probe_breakpoint_ops
;
9408 ops
= &bkpt_breakpoint_ops
;
9410 create_breakpoint (get_current_arch (),
9412 NULL
, 0, arg
, 1 /* parse arg */,
9413 tempflag
, type_wanted
,
9414 0 /* Ignore count */,
9415 pending_break_support
,
9423 /* Helper function for break_command_1 and disassemble_command. */
9426 resolve_sal_pc (struct symtab_and_line
*sal
)
9430 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
9432 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
9433 error (_("No line %d in file \"%s\"."),
9434 sal
->line
, symtab_to_filename_for_display (sal
->symtab
));
9437 /* If this SAL corresponds to a breakpoint inserted using a line
9438 number, then skip the function prologue if necessary. */
9439 if (sal
->explicit_line
)
9440 skip_prologue_sal (sal
);
9443 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
9445 const struct blockvector
*bv
;
9446 const struct block
*b
;
9449 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
,
9450 SYMTAB_COMPUNIT (sal
->symtab
));
9453 sym
= block_linkage_function (b
);
9456 fixup_symbol_section (sym
, SYMTAB_OBJFILE (sal
->symtab
));
9457 sal
->section
= SYMBOL_OBJ_SECTION (SYMTAB_OBJFILE (sal
->symtab
),
9462 /* It really is worthwhile to have the section, so we'll
9463 just have to look harder. This case can be executed
9464 if we have line numbers but no functions (as can
9465 happen in assembly source). */
9467 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
9468 switch_to_program_space_and_thread (sal
->pspace
);
9470 bound_minimal_symbol msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
9472 sal
->section
= MSYMBOL_OBJ_SECTION (msym
.objfile
, msym
.minsym
);
9479 break_command (const char *arg
, int from_tty
)
9481 break_command_1 (arg
, 0, from_tty
);
9485 tbreak_command (const char *arg
, int from_tty
)
9487 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
9491 hbreak_command (const char *arg
, int from_tty
)
9493 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
9497 thbreak_command (const char *arg
, int from_tty
)
9499 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
9503 stop_command (const char *arg
, int from_tty
)
9505 printf_filtered (_("Specify the type of breakpoint to set.\n\
9506 Usage: stop in <function | address>\n\
9507 stop at <line>\n"));
9511 stopin_command (const char *arg
, int from_tty
)
9515 if (arg
== (char *) NULL
)
9517 else if (*arg
!= '*')
9519 const char *argptr
= arg
;
9522 /* Look for a ':'. If this is a line number specification, then
9523 say it is bad, otherwise, it should be an address or
9524 function/method name. */
9525 while (*argptr
&& !hasColon
)
9527 hasColon
= (*argptr
== ':');
9532 badInput
= (*argptr
!= ':'); /* Not a class::method */
9534 badInput
= isdigit (*arg
); /* a simple line number */
9538 printf_filtered (_("Usage: stop in <function | address>\n"));
9540 break_command_1 (arg
, 0, from_tty
);
9544 stopat_command (const char *arg
, int from_tty
)
9548 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
9552 const char *argptr
= arg
;
9555 /* Look for a ':'. If there is a '::' then get out, otherwise
9556 it is probably a line number. */
9557 while (*argptr
&& !hasColon
)
9559 hasColon
= (*argptr
== ':');
9564 badInput
= (*argptr
== ':'); /* we have class::method */
9566 badInput
= !isdigit (*arg
); /* not a line number */
9570 printf_filtered (_("Usage: stop at LINE\n"));
9572 break_command_1 (arg
, 0, from_tty
);
9575 /* The dynamic printf command is mostly like a regular breakpoint, but
9576 with a prewired command list consisting of a single output command,
9577 built from extra arguments supplied on the dprintf command
9581 dprintf_command (const char *arg
, int from_tty
)
9583 event_location_up location
= string_to_event_location (&arg
, current_language
);
9585 /* If non-NULL, ARG should have been advanced past the location;
9586 the next character must be ','. */
9589 if (arg
[0] != ',' || arg
[1] == '\0')
9590 error (_("Format string required"));
9593 /* Skip the comma. */
9598 create_breakpoint (get_current_arch (),
9600 NULL
, 0, arg
, 1 /* parse arg */,
9602 0 /* Ignore count */,
9603 pending_break_support
,
9604 &dprintf_breakpoint_ops
,
9612 agent_printf_command (const char *arg
, int from_tty
)
9614 error (_("May only run agent-printf on the target"));
9617 /* Implement the "breakpoint_hit" breakpoint_ops method for
9618 ranged breakpoints. */
9621 breakpoint_hit_ranged_breakpoint (const struct bp_location
*bl
,
9622 const address_space
*aspace
,
9624 const struct target_waitstatus
*ws
)
9626 if (ws
->kind
!= TARGET_WAITKIND_STOPPED
9627 || ws
->value
.sig
!= GDB_SIGNAL_TRAP
)
9630 return breakpoint_address_match_range (bl
->pspace
->aspace
, bl
->address
,
9631 bl
->length
, aspace
, bp_addr
);
9634 /* Implement the "resources_needed" breakpoint_ops method for
9635 ranged breakpoints. */
9638 resources_needed_ranged_breakpoint (const struct bp_location
*bl
)
9640 return target_ranged_break_num_registers ();
9643 /* Implement the "print_it" breakpoint_ops method for
9644 ranged breakpoints. */
9646 static enum print_stop_action
9647 print_it_ranged_breakpoint (bpstat bs
)
9649 struct breakpoint
*b
= bs
->breakpoint_at
;
9650 struct bp_location
*bl
= b
->loc
;
9651 struct ui_out
*uiout
= current_uiout
;
9653 gdb_assert (b
->type
== bp_hardware_breakpoint
);
9655 /* Ranged breakpoints have only one location. */
9656 gdb_assert (bl
&& bl
->next
== NULL
);
9658 annotate_breakpoint (b
->number
);
9660 maybe_print_thread_hit_breakpoint (uiout
);
9662 if (b
->disposition
== disp_del
)
9663 uiout
->text ("Temporary ranged breakpoint ");
9665 uiout
->text ("Ranged breakpoint ");
9666 if (uiout
->is_mi_like_p ())
9668 uiout
->field_string ("reason",
9669 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
9670 uiout
->field_string ("disp", bpdisp_text (b
->disposition
));
9672 uiout
->field_int ("bkptno", b
->number
);
9675 return PRINT_SRC_AND_LOC
;
9678 /* Implement the "print_one" breakpoint_ops method for
9679 ranged breakpoints. */
9682 print_one_ranged_breakpoint (struct breakpoint
*b
,
9683 struct bp_location
**last_loc
)
9685 struct bp_location
*bl
= b
->loc
;
9686 struct value_print_options opts
;
9687 struct ui_out
*uiout
= current_uiout
;
9689 /* Ranged breakpoints have only one location. */
9690 gdb_assert (bl
&& bl
->next
== NULL
);
9692 get_user_print_options (&opts
);
9694 if (opts
.addressprint
)
9695 /* We don't print the address range here, it will be printed later
9696 by print_one_detail_ranged_breakpoint. */
9697 uiout
->field_skip ("addr");
9699 print_breakpoint_location (b
, bl
);
9703 /* Implement the "print_one_detail" breakpoint_ops method for
9704 ranged breakpoints. */
9707 print_one_detail_ranged_breakpoint (const struct breakpoint
*b
,
9708 struct ui_out
*uiout
)
9710 CORE_ADDR address_start
, address_end
;
9711 struct bp_location
*bl
= b
->loc
;
9716 address_start
= bl
->address
;
9717 address_end
= address_start
+ bl
->length
- 1;
9719 uiout
->text ("\taddress range: ");
9720 stb
.printf ("[%s, %s]",
9721 print_core_address (bl
->gdbarch
, address_start
),
9722 print_core_address (bl
->gdbarch
, address_end
));
9723 uiout
->field_stream ("addr", stb
);
9727 /* Implement the "print_mention" breakpoint_ops method for
9728 ranged breakpoints. */
9731 print_mention_ranged_breakpoint (struct breakpoint
*b
)
9733 struct bp_location
*bl
= b
->loc
;
9734 struct ui_out
*uiout
= current_uiout
;
9737 gdb_assert (b
->type
== bp_hardware_breakpoint
);
9739 uiout
->message (_("Hardware assisted ranged breakpoint %d from %s to %s."),
9740 b
->number
, paddress (bl
->gdbarch
, bl
->address
),
9741 paddress (bl
->gdbarch
, bl
->address
+ bl
->length
- 1));
9744 /* Implement the "print_recreate" breakpoint_ops method for
9745 ranged breakpoints. */
9748 print_recreate_ranged_breakpoint (struct breakpoint
*b
, struct ui_file
*fp
)
9750 fprintf_unfiltered (fp
, "break-range %s, %s",
9751 event_location_to_string (b
->location
.get ()),
9752 event_location_to_string (b
->location_range_end
.get ()));
9753 print_recreate_thread (b
, fp
);
9756 /* The breakpoint_ops structure to be used in ranged breakpoints. */
9758 static struct breakpoint_ops ranged_breakpoint_ops
;
9760 /* Find the address where the end of the breakpoint range should be
9761 placed, given the SAL of the end of the range. This is so that if
9762 the user provides a line number, the end of the range is set to the
9763 last instruction of the given line. */
9766 find_breakpoint_range_end (struct symtab_and_line sal
)
9770 /* If the user provided a PC value, use it. Otherwise,
9771 find the address of the end of the given location. */
9772 if (sal
.explicit_pc
)
9779 ret
= find_line_pc_range (sal
, &start
, &end
);
9781 error (_("Could not find location of the end of the range."));
9783 /* find_line_pc_range returns the start of the next line. */
9790 /* Implement the "break-range" CLI command. */
9793 break_range_command (const char *arg
, int from_tty
)
9795 const char *arg_start
;
9796 struct linespec_result canonical_start
, canonical_end
;
9797 int bp_count
, can_use_bp
, length
;
9799 struct breakpoint
*b
;
9801 /* We don't support software ranged breakpoints. */
9802 if (target_ranged_break_num_registers () < 0)
9803 error (_("This target does not support hardware ranged breakpoints."));
9805 bp_count
= hw_breakpoint_used_count ();
9806 bp_count
+= target_ranged_break_num_registers ();
9807 can_use_bp
= target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
9810 error (_("Hardware breakpoints used exceeds limit."));
9812 arg
= skip_spaces (arg
);
9813 if (arg
== NULL
|| arg
[0] == '\0')
9814 error(_("No address range specified."));
9817 event_location_up start_location
= string_to_event_location (&arg
,
9819 parse_breakpoint_sals (start_location
.get (), &canonical_start
);
9822 error (_("Too few arguments."));
9823 else if (canonical_start
.lsals
.empty ())
9824 error (_("Could not find location of the beginning of the range."));
9826 const linespec_sals
&lsal_start
= canonical_start
.lsals
[0];
9828 if (canonical_start
.lsals
.size () > 1
9829 || lsal_start
.sals
.size () != 1)
9830 error (_("Cannot create a ranged breakpoint with multiple locations."));
9832 const symtab_and_line
&sal_start
= lsal_start
.sals
[0];
9833 std::string
addr_string_start (arg_start
, arg
- arg_start
);
9835 arg
++; /* Skip the comma. */
9836 arg
= skip_spaces (arg
);
9838 /* Parse the end location. */
9842 /* We call decode_line_full directly here instead of using
9843 parse_breakpoint_sals because we need to specify the start location's
9844 symtab and line as the default symtab and line for the end of the
9845 range. This makes it possible to have ranges like "foo.c:27, +14",
9846 where +14 means 14 lines from the start location. */
9847 event_location_up end_location
= string_to_event_location (&arg
,
9849 decode_line_full (end_location
.get (), DECODE_LINE_FUNFIRSTLINE
, NULL
,
9850 sal_start
.symtab
, sal_start
.line
,
9851 &canonical_end
, NULL
, NULL
);
9853 if (canonical_end
.lsals
.empty ())
9854 error (_("Could not find location of the end of the range."));
9856 const linespec_sals
&lsal_end
= canonical_end
.lsals
[0];
9857 if (canonical_end
.lsals
.size () > 1
9858 || lsal_end
.sals
.size () != 1)
9859 error (_("Cannot create a ranged breakpoint with multiple locations."));
9861 const symtab_and_line
&sal_end
= lsal_end
.sals
[0];
9863 end
= find_breakpoint_range_end (sal_end
);
9864 if (sal_start
.pc
> end
)
9865 error (_("Invalid address range, end precedes start."));
9867 length
= end
- sal_start
.pc
+ 1;
9869 /* Length overflowed. */
9870 error (_("Address range too large."));
9871 else if (length
== 1)
9873 /* This range is simple enough to be handled by
9874 the `hbreak' command. */
9875 hbreak_command (&addr_string_start
[0], 1);
9880 /* Now set up the breakpoint. */
9881 b
= set_raw_breakpoint (get_current_arch (), sal_start
,
9882 bp_hardware_breakpoint
, &ranged_breakpoint_ops
);
9883 set_breakpoint_count (breakpoint_count
+ 1);
9884 b
->number
= breakpoint_count
;
9885 b
->disposition
= disp_donttouch
;
9886 b
->location
= std::move (start_location
);
9887 b
->location_range_end
= std::move (end_location
);
9888 b
->loc
->length
= length
;
9891 gdb::observers::breakpoint_created
.notify (b
);
9892 update_global_location_list (UGLL_MAY_INSERT
);
9895 /* Return non-zero if EXP is verified as constant. Returned zero
9896 means EXP is variable. Also the constant detection may fail for
9897 some constant expressions and in such case still falsely return
9901 watchpoint_exp_is_const (const struct expression
*exp
)
9909 /* We are only interested in the descriptor of each element. */
9910 operator_length (exp
, i
, &oplenp
, &argsp
);
9913 switch (exp
->elts
[i
].opcode
)
9923 case BINOP_LOGICAL_AND
:
9924 case BINOP_LOGICAL_OR
:
9925 case BINOP_BITWISE_AND
:
9926 case BINOP_BITWISE_IOR
:
9927 case BINOP_BITWISE_XOR
:
9929 case BINOP_NOTEQUAL
:
9955 case OP_OBJC_NSSTRING
:
9958 case UNOP_LOGICAL_NOT
:
9959 case UNOP_COMPLEMENT
:
9964 case UNOP_CAST_TYPE
:
9965 case UNOP_REINTERPRET_CAST
:
9966 case UNOP_DYNAMIC_CAST
:
9967 /* Unary, binary and ternary operators: We have to check
9968 their operands. If they are constant, then so is the
9969 result of that operation. For instance, if A and B are
9970 determined to be constants, then so is "A + B".
9972 UNOP_IND is one exception to the rule above, because the
9973 value of *ADDR is not necessarily a constant, even when
9978 /* Check whether the associated symbol is a constant.
9980 We use SYMBOL_CLASS rather than TYPE_CONST because it's
9981 possible that a buggy compiler could mark a variable as
9982 constant even when it is not, and TYPE_CONST would return
9983 true in this case, while SYMBOL_CLASS wouldn't.
9985 We also have to check for function symbols because they
9986 are always constant. */
9988 struct symbol
*s
= exp
->elts
[i
+ 2].symbol
;
9990 if (SYMBOL_CLASS (s
) != LOC_BLOCK
9991 && SYMBOL_CLASS (s
) != LOC_CONST
9992 && SYMBOL_CLASS (s
) != LOC_CONST_BYTES
)
9997 /* The default action is to return 0 because we are using
9998 the optimistic approach here: If we don't know something,
9999 then it is not a constant. */
10008 /* Watchpoint destructor. */
10010 watchpoint::~watchpoint ()
10012 xfree (this->exp_string
);
10013 xfree (this->exp_string_reparse
);
10016 /* Implement the "re_set" breakpoint_ops method for watchpoints. */
10019 re_set_watchpoint (struct breakpoint
*b
)
10021 struct watchpoint
*w
= (struct watchpoint
*) b
;
10023 /* Watchpoint can be either on expression using entirely global
10024 variables, or it can be on local variables.
10026 Watchpoints of the first kind are never auto-deleted, and even
10027 persist across program restarts. Since they can use variables
10028 from shared libraries, we need to reparse expression as libraries
10029 are loaded and unloaded.
10031 Watchpoints on local variables can also change meaning as result
10032 of solib event. For example, if a watchpoint uses both a local
10033 and a global variables in expression, it's a local watchpoint,
10034 but unloading of a shared library will make the expression
10035 invalid. This is not a very common use case, but we still
10036 re-evaluate expression, to avoid surprises to the user.
10038 Note that for local watchpoints, we re-evaluate it only if
10039 watchpoints frame id is still valid. If it's not, it means the
10040 watchpoint is out of scope and will be deleted soon. In fact,
10041 I'm not sure we'll ever be called in this case.
10043 If a local watchpoint's frame id is still valid, then
10044 w->exp_valid_block is likewise valid, and we can safely use it.
10046 Don't do anything about disabled watchpoints, since they will be
10047 reevaluated again when enabled. */
10048 update_watchpoint (w
, 1 /* reparse */);
10051 /* Implement the "insert" breakpoint_ops method for hardware watchpoints. */
10054 insert_watchpoint (struct bp_location
*bl
)
10056 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
10057 int length
= w
->exact
? 1 : bl
->length
;
10059 return target_insert_watchpoint (bl
->address
, length
, bl
->watchpoint_type
,
10060 w
->cond_exp
.get ());
10063 /* Implement the "remove" breakpoint_ops method for hardware watchpoints. */
10066 remove_watchpoint (struct bp_location
*bl
, enum remove_bp_reason reason
)
10068 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
10069 int length
= w
->exact
? 1 : bl
->length
;
10071 return target_remove_watchpoint (bl
->address
, length
, bl
->watchpoint_type
,
10072 w
->cond_exp
.get ());
10076 breakpoint_hit_watchpoint (const struct bp_location
*bl
,
10077 const address_space
*aspace
, CORE_ADDR bp_addr
,
10078 const struct target_waitstatus
*ws
)
10080 struct breakpoint
*b
= bl
->owner
;
10081 struct watchpoint
*w
= (struct watchpoint
*) b
;
10083 /* Continuable hardware watchpoints are treated as non-existent if the
10084 reason we stopped wasn't a hardware watchpoint (we didn't stop on
10085 some data address). Otherwise gdb won't stop on a break instruction
10086 in the code (not from a breakpoint) when a hardware watchpoint has
10087 been defined. Also skip watchpoints which we know did not trigger
10088 (did not match the data address). */
10089 if (is_hardware_watchpoint (b
)
10090 && w
->watchpoint_triggered
== watch_triggered_no
)
10097 check_status_watchpoint (bpstat bs
)
10099 gdb_assert (is_watchpoint (bs
->breakpoint_at
));
10101 bpstat_check_watchpoint (bs
);
10104 /* Implement the "resources_needed" breakpoint_ops method for
10105 hardware watchpoints. */
10108 resources_needed_watchpoint (const struct bp_location
*bl
)
10110 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
10111 int length
= w
->exact
? 1 : bl
->length
;
10113 return target_region_ok_for_hw_watchpoint (bl
->address
, length
);
10116 /* Implement the "works_in_software_mode" breakpoint_ops method for
10117 hardware watchpoints. */
10120 works_in_software_mode_watchpoint (const struct breakpoint
*b
)
10122 /* Read and access watchpoints only work with hardware support. */
10123 return b
->type
== bp_watchpoint
|| b
->type
== bp_hardware_watchpoint
;
10126 static enum print_stop_action
10127 print_it_watchpoint (bpstat bs
)
10129 struct breakpoint
*b
;
10130 enum print_stop_action result
;
10131 struct watchpoint
*w
;
10132 struct ui_out
*uiout
= current_uiout
;
10134 gdb_assert (bs
->bp_location_at
!= NULL
);
10136 b
= bs
->breakpoint_at
;
10137 w
= (struct watchpoint
*) b
;
10139 annotate_watchpoint (b
->number
);
10140 maybe_print_thread_hit_breakpoint (uiout
);
10144 gdb::optional
<ui_out_emit_tuple
> tuple_emitter
;
10147 case bp_watchpoint
:
10148 case bp_hardware_watchpoint
:
10149 if (uiout
->is_mi_like_p ())
10150 uiout
->field_string
10151 ("reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
10153 tuple_emitter
.emplace (uiout
, "value");
10154 uiout
->text ("\nOld value = ");
10155 watchpoint_value_print (bs
->old_val
.get (), &stb
);
10156 uiout
->field_stream ("old", stb
);
10157 uiout
->text ("\nNew value = ");
10158 watchpoint_value_print (w
->val
.get (), &stb
);
10159 uiout
->field_stream ("new", stb
);
10160 uiout
->text ("\n");
10161 /* More than one watchpoint may have been triggered. */
10162 result
= PRINT_UNKNOWN
;
10165 case bp_read_watchpoint
:
10166 if (uiout
->is_mi_like_p ())
10167 uiout
->field_string
10168 ("reason", async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
10170 tuple_emitter
.emplace (uiout
, "value");
10171 uiout
->text ("\nValue = ");
10172 watchpoint_value_print (w
->val
.get (), &stb
);
10173 uiout
->field_stream ("value", stb
);
10174 uiout
->text ("\n");
10175 result
= PRINT_UNKNOWN
;
10178 case bp_access_watchpoint
:
10179 if (bs
->old_val
!= NULL
)
10181 if (uiout
->is_mi_like_p ())
10182 uiout
->field_string
10184 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
10186 tuple_emitter
.emplace (uiout
, "value");
10187 uiout
->text ("\nOld value = ");
10188 watchpoint_value_print (bs
->old_val
.get (), &stb
);
10189 uiout
->field_stream ("old", stb
);
10190 uiout
->text ("\nNew value = ");
10195 if (uiout
->is_mi_like_p ())
10196 uiout
->field_string
10198 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
10199 tuple_emitter
.emplace (uiout
, "value");
10200 uiout
->text ("\nValue = ");
10202 watchpoint_value_print (w
->val
.get (), &stb
);
10203 uiout
->field_stream ("new", stb
);
10204 uiout
->text ("\n");
10205 result
= PRINT_UNKNOWN
;
10208 result
= PRINT_UNKNOWN
;
10214 /* Implement the "print_mention" breakpoint_ops method for hardware
10218 print_mention_watchpoint (struct breakpoint
*b
)
10220 struct watchpoint
*w
= (struct watchpoint
*) b
;
10221 struct ui_out
*uiout
= current_uiout
;
10222 const char *tuple_name
;
10226 case bp_watchpoint
:
10227 uiout
->text ("Watchpoint ");
10228 tuple_name
= "wpt";
10230 case bp_hardware_watchpoint
:
10231 uiout
->text ("Hardware watchpoint ");
10232 tuple_name
= "wpt";
10234 case bp_read_watchpoint
:
10235 uiout
->text ("Hardware read watchpoint ");
10236 tuple_name
= "hw-rwpt";
10238 case bp_access_watchpoint
:
10239 uiout
->text ("Hardware access (read/write) watchpoint ");
10240 tuple_name
= "hw-awpt";
10243 internal_error (__FILE__
, __LINE__
,
10244 _("Invalid hardware watchpoint type."));
10247 ui_out_emit_tuple
tuple_emitter (uiout
, tuple_name
);
10248 uiout
->field_int ("number", b
->number
);
10249 uiout
->text (": ");
10250 uiout
->field_string ("exp", w
->exp_string
);
10253 /* Implement the "print_recreate" breakpoint_ops method for
10257 print_recreate_watchpoint (struct breakpoint
*b
, struct ui_file
*fp
)
10259 struct watchpoint
*w
= (struct watchpoint
*) b
;
10263 case bp_watchpoint
:
10264 case bp_hardware_watchpoint
:
10265 fprintf_unfiltered (fp
, "watch");
10267 case bp_read_watchpoint
:
10268 fprintf_unfiltered (fp
, "rwatch");
10270 case bp_access_watchpoint
:
10271 fprintf_unfiltered (fp
, "awatch");
10274 internal_error (__FILE__
, __LINE__
,
10275 _("Invalid watchpoint type."));
10278 fprintf_unfiltered (fp
, " %s", w
->exp_string
);
10279 print_recreate_thread (b
, fp
);
10282 /* Implement the "explains_signal" breakpoint_ops method for
10286 explains_signal_watchpoint (struct breakpoint
*b
, enum gdb_signal sig
)
10288 /* A software watchpoint cannot cause a signal other than
10289 GDB_SIGNAL_TRAP. */
10290 if (b
->type
== bp_watchpoint
&& sig
!= GDB_SIGNAL_TRAP
)
10296 /* The breakpoint_ops structure to be used in hardware watchpoints. */
10298 static struct breakpoint_ops watchpoint_breakpoint_ops
;
10300 /* Implement the "insert" breakpoint_ops method for
10301 masked hardware watchpoints. */
10304 insert_masked_watchpoint (struct bp_location
*bl
)
10306 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
10308 return target_insert_mask_watchpoint (bl
->address
, w
->hw_wp_mask
,
10309 bl
->watchpoint_type
);
10312 /* Implement the "remove" breakpoint_ops method for
10313 masked hardware watchpoints. */
10316 remove_masked_watchpoint (struct bp_location
*bl
, enum remove_bp_reason reason
)
10318 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
10320 return target_remove_mask_watchpoint (bl
->address
, w
->hw_wp_mask
,
10321 bl
->watchpoint_type
);
10324 /* Implement the "resources_needed" breakpoint_ops method for
10325 masked hardware watchpoints. */
10328 resources_needed_masked_watchpoint (const struct bp_location
*bl
)
10330 struct watchpoint
*w
= (struct watchpoint
*) bl
->owner
;
10332 return target_masked_watch_num_registers (bl
->address
, w
->hw_wp_mask
);
10335 /* Implement the "works_in_software_mode" breakpoint_ops method for
10336 masked hardware watchpoints. */
10339 works_in_software_mode_masked_watchpoint (const struct breakpoint
*b
)
10344 /* Implement the "print_it" breakpoint_ops method for
10345 masked hardware watchpoints. */
10347 static enum print_stop_action
10348 print_it_masked_watchpoint (bpstat bs
)
10350 struct breakpoint
*b
= bs
->breakpoint_at
;
10351 struct ui_out
*uiout
= current_uiout
;
10353 /* Masked watchpoints have only one location. */
10354 gdb_assert (b
->loc
&& b
->loc
->next
== NULL
);
10356 annotate_watchpoint (b
->number
);
10357 maybe_print_thread_hit_breakpoint (uiout
);
10361 case bp_hardware_watchpoint
:
10362 if (uiout
->is_mi_like_p ())
10363 uiout
->field_string
10364 ("reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
10367 case bp_read_watchpoint
:
10368 if (uiout
->is_mi_like_p ())
10369 uiout
->field_string
10370 ("reason", async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
10373 case bp_access_watchpoint
:
10374 if (uiout
->is_mi_like_p ())
10375 uiout
->field_string
10377 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
10380 internal_error (__FILE__
, __LINE__
,
10381 _("Invalid hardware watchpoint type."));
10385 uiout
->text (_("\n\
10386 Check the underlying instruction at PC for the memory\n\
10387 address and value which triggered this watchpoint.\n"));
10388 uiout
->text ("\n");
10390 /* More than one watchpoint may have been triggered. */
10391 return PRINT_UNKNOWN
;
10394 /* Implement the "print_one_detail" breakpoint_ops method for
10395 masked hardware watchpoints. */
10398 print_one_detail_masked_watchpoint (const struct breakpoint
*b
,
10399 struct ui_out
*uiout
)
10401 struct watchpoint
*w
= (struct watchpoint
*) b
;
10403 /* Masked watchpoints have only one location. */
10404 gdb_assert (b
->loc
&& b
->loc
->next
== NULL
);
10406 uiout
->text ("\tmask ");
10407 uiout
->field_core_addr ("mask", b
->loc
->gdbarch
, w
->hw_wp_mask
);
10408 uiout
->text ("\n");
10411 /* Implement the "print_mention" breakpoint_ops method for
10412 masked hardware watchpoints. */
10415 print_mention_masked_watchpoint (struct breakpoint
*b
)
10417 struct watchpoint
*w
= (struct watchpoint
*) b
;
10418 struct ui_out
*uiout
= current_uiout
;
10419 const char *tuple_name
;
10423 case bp_hardware_watchpoint
:
10424 uiout
->text ("Masked hardware watchpoint ");
10425 tuple_name
= "wpt";
10427 case bp_read_watchpoint
:
10428 uiout
->text ("Masked hardware read watchpoint ");
10429 tuple_name
= "hw-rwpt";
10431 case bp_access_watchpoint
:
10432 uiout
->text ("Masked hardware access (read/write) watchpoint ");
10433 tuple_name
= "hw-awpt";
10436 internal_error (__FILE__
, __LINE__
,
10437 _("Invalid hardware watchpoint type."));
10440 ui_out_emit_tuple
tuple_emitter (uiout
, tuple_name
);
10441 uiout
->field_int ("number", b
->number
);
10442 uiout
->text (": ");
10443 uiout
->field_string ("exp", w
->exp_string
);
10446 /* Implement the "print_recreate" breakpoint_ops method for
10447 masked hardware watchpoints. */
10450 print_recreate_masked_watchpoint (struct breakpoint
*b
, struct ui_file
*fp
)
10452 struct watchpoint
*w
= (struct watchpoint
*) b
;
10457 case bp_hardware_watchpoint
:
10458 fprintf_unfiltered (fp
, "watch");
10460 case bp_read_watchpoint
:
10461 fprintf_unfiltered (fp
, "rwatch");
10463 case bp_access_watchpoint
:
10464 fprintf_unfiltered (fp
, "awatch");
10467 internal_error (__FILE__
, __LINE__
,
10468 _("Invalid hardware watchpoint type."));
10471 sprintf_vma (tmp
, w
->hw_wp_mask
);
10472 fprintf_unfiltered (fp
, " %s mask 0x%s", w
->exp_string
, tmp
);
10473 print_recreate_thread (b
, fp
);
10476 /* The breakpoint_ops structure to be used in masked hardware watchpoints. */
10478 static struct breakpoint_ops masked_watchpoint_breakpoint_ops
;
10480 /* Tell whether the given watchpoint is a masked hardware watchpoint. */
10483 is_masked_watchpoint (const struct breakpoint
*b
)
10485 return b
->ops
== &masked_watchpoint_breakpoint_ops
;
10488 /* accessflag: hw_write: watch write,
10489 hw_read: watch read,
10490 hw_access: watch access (read or write) */
10492 watch_command_1 (const char *arg
, int accessflag
, int from_tty
,
10493 int just_location
, int internal
)
10495 struct breakpoint
*scope_breakpoint
= NULL
;
10496 const struct block
*exp_valid_block
= NULL
, *cond_exp_valid_block
= NULL
;
10497 struct value
*result
;
10498 int saved_bitpos
= 0, saved_bitsize
= 0;
10499 const char *exp_start
= NULL
;
10500 const char *exp_end
= NULL
;
10501 const char *tok
, *end_tok
;
10503 const char *cond_start
= NULL
;
10504 const char *cond_end
= NULL
;
10505 enum bptype bp_type
;
10508 /* Flag to indicate whether we are going to use masks for
10509 the hardware watchpoint. */
10511 CORE_ADDR mask
= 0;
10513 /* Make sure that we actually have parameters to parse. */
10514 if (arg
!= NULL
&& arg
[0] != '\0')
10516 const char *value_start
;
10518 exp_end
= arg
+ strlen (arg
);
10520 /* Look for "parameter value" pairs at the end
10521 of the arguments string. */
10522 for (tok
= exp_end
- 1; tok
> arg
; tok
--)
10524 /* Skip whitespace at the end of the argument list. */
10525 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
10528 /* Find the beginning of the last token.
10529 This is the value of the parameter. */
10530 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
10532 value_start
= tok
+ 1;
10534 /* Skip whitespace. */
10535 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
10540 /* Find the beginning of the second to last token.
10541 This is the parameter itself. */
10542 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
10545 toklen
= end_tok
- tok
+ 1;
10547 if (toklen
== 6 && startswith (tok
, "thread"))
10549 struct thread_info
*thr
;
10550 /* At this point we've found a "thread" token, which means
10551 the user is trying to set a watchpoint that triggers
10552 only in a specific thread. */
10556 error(_("You can specify only one thread."));
10558 /* Extract the thread ID from the next token. */
10559 thr
= parse_thread_id (value_start
, &endp
);
10561 /* Check if the user provided a valid thread ID. */
10562 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
10563 invalid_thread_id_error (value_start
);
10565 thread
= thr
->global_num
;
10567 else if (toklen
== 4 && startswith (tok
, "mask"))
10569 /* We've found a "mask" token, which means the user wants to
10570 create a hardware watchpoint that is going to have the mask
10572 struct value
*mask_value
, *mark
;
10575 error(_("You can specify only one mask."));
10577 use_mask
= just_location
= 1;
10579 mark
= value_mark ();
10580 mask_value
= parse_to_comma_and_eval (&value_start
);
10581 mask
= value_as_address (mask_value
);
10582 value_free_to_mark (mark
);
10585 /* We didn't recognize what we found. We should stop here. */
10588 /* Truncate the string and get rid of the "parameter value" pair before
10589 the arguments string is parsed by the parse_exp_1 function. */
10596 /* Parse the rest of the arguments. From here on out, everything
10597 is in terms of a newly allocated string instead of the original
10599 innermost_block
.reset ();
10600 std::string
expression (arg
, exp_end
- arg
);
10601 exp_start
= arg
= expression
.c_str ();
10602 expression_up exp
= parse_exp_1 (&arg
, 0, 0, 0);
10604 /* Remove trailing whitespace from the expression before saving it.
10605 This makes the eventual display of the expression string a bit
10607 while (exp_end
> exp_start
&& (exp_end
[-1] == ' ' || exp_end
[-1] == '\t'))
10610 /* Checking if the expression is not constant. */
10611 if (watchpoint_exp_is_const (exp
.get ()))
10615 len
= exp_end
- exp_start
;
10616 while (len
> 0 && isspace (exp_start
[len
- 1]))
10618 error (_("Cannot watch constant value `%.*s'."), len
, exp_start
);
10621 exp_valid_block
= innermost_block
.block ();
10622 struct value
*mark
= value_mark ();
10623 struct value
*val_as_value
= nullptr;
10624 fetch_subexp_value (exp
.get (), &pc
, &val_as_value
, &result
, NULL
,
10627 if (val_as_value
!= NULL
&& just_location
)
10629 saved_bitpos
= value_bitpos (val_as_value
);
10630 saved_bitsize
= value_bitsize (val_as_value
);
10638 exp_valid_block
= NULL
;
10639 val
= release_value (value_addr (result
));
10640 value_free_to_mark (mark
);
10644 ret
= target_masked_watch_num_registers (value_as_address (val
.get ()),
10647 error (_("This target does not support masked watchpoints."));
10648 else if (ret
== -2)
10649 error (_("Invalid mask or memory region."));
10652 else if (val_as_value
!= NULL
)
10653 val
= release_value (val_as_value
);
10655 tok
= skip_spaces (arg
);
10656 end_tok
= skip_to_space (tok
);
10658 toklen
= end_tok
- tok
;
10659 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
10661 innermost_block
.reset ();
10662 tok
= cond_start
= end_tok
+ 1;
10663 parse_exp_1 (&tok
, 0, 0, 0);
10665 /* The watchpoint expression may not be local, but the condition
10666 may still be. E.g.: `watch global if local > 0'. */
10667 cond_exp_valid_block
= innermost_block
.block ();
10672 error (_("Junk at end of command."));
10674 frame_info
*wp_frame
= block_innermost_frame (exp_valid_block
);
10676 /* Save this because create_internal_breakpoint below invalidates
10678 frame_id watchpoint_frame
= get_frame_id (wp_frame
);
10680 /* If the expression is "local", then set up a "watchpoint scope"
10681 breakpoint at the point where we've left the scope of the watchpoint
10682 expression. Create the scope breakpoint before the watchpoint, so
10683 that we will encounter it first in bpstat_stop_status. */
10684 if (exp_valid_block
!= NULL
&& wp_frame
!= NULL
)
10686 frame_id caller_frame_id
= frame_unwind_caller_id (wp_frame
);
10688 if (frame_id_p (caller_frame_id
))
10690 gdbarch
*caller_arch
= frame_unwind_caller_arch (wp_frame
);
10691 CORE_ADDR caller_pc
= frame_unwind_caller_pc (wp_frame
);
10694 = create_internal_breakpoint (caller_arch
, caller_pc
,
10695 bp_watchpoint_scope
,
10696 &momentary_breakpoint_ops
);
10698 /* create_internal_breakpoint could invalidate WP_FRAME. */
10701 scope_breakpoint
->enable_state
= bp_enabled
;
10703 /* Automatically delete the breakpoint when it hits. */
10704 scope_breakpoint
->disposition
= disp_del
;
10706 /* Only break in the proper frame (help with recursion). */
10707 scope_breakpoint
->frame_id
= caller_frame_id
;
10709 /* Set the address at which we will stop. */
10710 scope_breakpoint
->loc
->gdbarch
= caller_arch
;
10711 scope_breakpoint
->loc
->requested_address
= caller_pc
;
10712 scope_breakpoint
->loc
->address
10713 = adjust_breakpoint_address (scope_breakpoint
->loc
->gdbarch
,
10714 scope_breakpoint
->loc
->requested_address
,
10715 scope_breakpoint
->type
);
10719 /* Now set up the breakpoint. We create all watchpoints as hardware
10720 watchpoints here even if hardware watchpoints are turned off, a call
10721 to update_watchpoint later in this function will cause the type to
10722 drop back to bp_watchpoint (software watchpoint) if required. */
10724 if (accessflag
== hw_read
)
10725 bp_type
= bp_read_watchpoint
;
10726 else if (accessflag
== hw_access
)
10727 bp_type
= bp_access_watchpoint
;
10729 bp_type
= bp_hardware_watchpoint
;
10731 std::unique_ptr
<watchpoint
> w (new watchpoint ());
10734 init_raw_breakpoint_without_location (w
.get (), NULL
, bp_type
,
10735 &masked_watchpoint_breakpoint_ops
);
10737 init_raw_breakpoint_without_location (w
.get (), NULL
, bp_type
,
10738 &watchpoint_breakpoint_ops
);
10739 w
->thread
= thread
;
10740 w
->disposition
= disp_donttouch
;
10741 w
->pspace
= current_program_space
;
10742 w
->exp
= std::move (exp
);
10743 w
->exp_valid_block
= exp_valid_block
;
10744 w
->cond_exp_valid_block
= cond_exp_valid_block
;
10747 struct type
*t
= value_type (val
.get ());
10748 CORE_ADDR addr
= value_as_address (val
.get ());
10750 w
->exp_string_reparse
10751 = current_language
->la_watch_location_expression (t
, addr
).release ();
10753 w
->exp_string
= xstrprintf ("-location %.*s",
10754 (int) (exp_end
- exp_start
), exp_start
);
10757 w
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
10761 w
->hw_wp_mask
= mask
;
10766 w
->val_bitpos
= saved_bitpos
;
10767 w
->val_bitsize
= saved_bitsize
;
10772 w
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
10774 w
->cond_string
= 0;
10776 if (frame_id_p (watchpoint_frame
))
10778 w
->watchpoint_frame
= watchpoint_frame
;
10779 w
->watchpoint_thread
= inferior_ptid
;
10783 w
->watchpoint_frame
= null_frame_id
;
10784 w
->watchpoint_thread
= null_ptid
;
10787 if (scope_breakpoint
!= NULL
)
10789 /* The scope breakpoint is related to the watchpoint. We will
10790 need to act on them together. */
10791 w
->related_breakpoint
= scope_breakpoint
;
10792 scope_breakpoint
->related_breakpoint
= w
.get ();
10795 if (!just_location
)
10796 value_free_to_mark (mark
);
10798 /* Finally update the new watchpoint. This creates the locations
10799 that should be inserted. */
10800 update_watchpoint (w
.get (), 1);
10802 install_breakpoint (internal
, std::move (w
), 1);
10805 /* Return count of debug registers needed to watch the given expression.
10806 If the watchpoint cannot be handled in hardware return zero. */
10809 can_use_hardware_watchpoint (const std::vector
<value_ref_ptr
> &vals
)
10811 int found_memory_cnt
= 0;
10813 /* Did the user specifically forbid us to use hardware watchpoints? */
10814 if (!can_use_hw_watchpoints
)
10817 gdb_assert (!vals
.empty ());
10818 struct value
*head
= vals
[0].get ();
10820 /* Make sure that the value of the expression depends only upon
10821 memory contents, and values computed from them within GDB. If we
10822 find any register references or function calls, we can't use a
10823 hardware watchpoint.
10825 The idea here is that evaluating an expression generates a series
10826 of values, one holding the value of every subexpression. (The
10827 expression a*b+c has five subexpressions: a, b, a*b, c, and
10828 a*b+c.) GDB's values hold almost enough information to establish
10829 the criteria given above --- they identify memory lvalues,
10830 register lvalues, computed values, etcetera. So we can evaluate
10831 the expression, and then scan the chain of values that leaves
10832 behind to decide whether we can detect any possible change to the
10833 expression's final value using only hardware watchpoints.
10835 However, I don't think that the values returned by inferior
10836 function calls are special in any way. So this function may not
10837 notice that an expression involving an inferior function call
10838 can't be watched with hardware watchpoints. FIXME. */
10839 for (const value_ref_ptr
&iter
: vals
)
10841 struct value
*v
= iter
.get ();
10843 if (VALUE_LVAL (v
) == lval_memory
)
10845 if (v
!= head
&& value_lazy (v
))
10846 /* A lazy memory lvalue in the chain is one that GDB never
10847 needed to fetch; we either just used its address (e.g.,
10848 `a' in `a.b') or we never needed it at all (e.g., `a'
10849 in `a,b'). This doesn't apply to HEAD; if that is
10850 lazy then it was not readable, but watch it anyway. */
10854 /* Ahh, memory we actually used! Check if we can cover
10855 it with hardware watchpoints. */
10856 struct type
*vtype
= check_typedef (value_type (v
));
10858 /* We only watch structs and arrays if user asked for it
10859 explicitly, never if they just happen to appear in a
10860 middle of some value chain. */
10862 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
10863 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
10865 CORE_ADDR vaddr
= value_address (v
);
10869 len
= (target_exact_watchpoints
10870 && is_scalar_type_recursive (vtype
))?
10871 1 : TYPE_LENGTH (value_type (v
));
10873 num_regs
= target_region_ok_for_hw_watchpoint (vaddr
, len
);
10877 found_memory_cnt
+= num_regs
;
10881 else if (VALUE_LVAL (v
) != not_lval
10882 && deprecated_value_modifiable (v
) == 0)
10883 return 0; /* These are values from the history (e.g., $1). */
10884 else if (VALUE_LVAL (v
) == lval_register
)
10885 return 0; /* Cannot watch a register with a HW watchpoint. */
10888 /* The expression itself looks suitable for using a hardware
10889 watchpoint, but give the target machine a chance to reject it. */
10890 return found_memory_cnt
;
10894 watch_command_wrapper (const char *arg
, int from_tty
, int internal
)
10896 watch_command_1 (arg
, hw_write
, from_tty
, 0, internal
);
10899 /* A helper function that looks for the "-location" argument and then
10900 calls watch_command_1. */
10903 watch_maybe_just_location (const char *arg
, int accessflag
, int from_tty
)
10905 int just_location
= 0;
10908 && (check_for_argument (&arg
, "-location", sizeof ("-location") - 1)
10909 || check_for_argument (&arg
, "-l", sizeof ("-l") - 1)))
10911 arg
= skip_spaces (arg
);
10915 watch_command_1 (arg
, accessflag
, from_tty
, just_location
, 0);
10919 watch_command (const char *arg
, int from_tty
)
10921 watch_maybe_just_location (arg
, hw_write
, from_tty
);
10925 rwatch_command_wrapper (const char *arg
, int from_tty
, int internal
)
10927 watch_command_1 (arg
, hw_read
, from_tty
, 0, internal
);
10931 rwatch_command (const char *arg
, int from_tty
)
10933 watch_maybe_just_location (arg
, hw_read
, from_tty
);
10937 awatch_command_wrapper (const char *arg
, int from_tty
, int internal
)
10939 watch_command_1 (arg
, hw_access
, from_tty
, 0, internal
);
10943 awatch_command (const char *arg
, int from_tty
)
10945 watch_maybe_just_location (arg
, hw_access
, from_tty
);
10949 /* Data for the FSM that manages the until(location)/advance commands
10950 in infcmd.c. Here because it uses the mechanisms of
10953 struct until_break_fsm
: public thread_fsm
10955 /* The thread that was current when the command was executed. */
10958 /* The breakpoint set at the destination location. */
10959 breakpoint_up location_breakpoint
;
10961 /* Breakpoint set at the return address in the caller frame. May be
10963 breakpoint_up caller_breakpoint
;
10965 until_break_fsm (struct interp
*cmd_interp
, int thread
,
10966 breakpoint_up
&&location_breakpoint
,
10967 breakpoint_up
&&caller_breakpoint
)
10968 : thread_fsm (cmd_interp
),
10970 location_breakpoint (std::move (location_breakpoint
)),
10971 caller_breakpoint (std::move (caller_breakpoint
))
10975 void clean_up (struct thread_info
*thread
) override
;
10976 bool should_stop (struct thread_info
*thread
) override
;
10977 enum async_reply_reason
do_async_reply_reason () override
;
10980 /* Implementation of the 'should_stop' FSM method for the
10981 until(location)/advance commands. */
10984 until_break_fsm::should_stop (struct thread_info
*tp
)
10986 if (bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
10987 location_breakpoint
.get ()) != NULL
10988 || (caller_breakpoint
!= NULL
10989 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
10990 caller_breakpoint
.get ()) != NULL
))
10996 /* Implementation of the 'clean_up' FSM method for the
10997 until(location)/advance commands. */
11000 until_break_fsm::clean_up (struct thread_info
*)
11002 /* Clean up our temporary breakpoints. */
11003 location_breakpoint
.reset ();
11004 caller_breakpoint
.reset ();
11005 delete_longjmp_breakpoint (thread
);
11008 /* Implementation of the 'async_reply_reason' FSM method for the
11009 until(location)/advance commands. */
11011 enum async_reply_reason
11012 until_break_fsm::do_async_reply_reason ()
11014 return EXEC_ASYNC_LOCATION_REACHED
;
11018 until_break_command (const char *arg
, int from_tty
, int anywhere
)
11020 struct frame_info
*frame
;
11021 struct gdbarch
*frame_gdbarch
;
11022 struct frame_id stack_frame_id
;
11023 struct frame_id caller_frame_id
;
11025 struct thread_info
*tp
;
11027 clear_proceed_status (0);
11029 /* Set a breakpoint where the user wants it and at return from
11032 event_location_up location
= string_to_event_location (&arg
, current_language
);
11034 std::vector
<symtab_and_line
> sals
11035 = (last_displayed_sal_is_valid ()
11036 ? decode_line_1 (location
.get (), DECODE_LINE_FUNFIRSTLINE
, NULL
,
11037 get_last_displayed_symtab (),
11038 get_last_displayed_line ())
11039 : decode_line_1 (location
.get (), DECODE_LINE_FUNFIRSTLINE
,
11040 NULL
, (struct symtab
*) NULL
, 0));
11042 if (sals
.size () != 1)
11043 error (_("Couldn't get information on specified line."));
11045 symtab_and_line
&sal
= sals
[0];
11048 error (_("Junk at end of arguments."));
11050 resolve_sal_pc (&sal
);
11052 tp
= inferior_thread ();
11053 thread
= tp
->global_num
;
11055 /* Note linespec handling above invalidates the frame chain.
11056 Installing a breakpoint also invalidates the frame chain (as it
11057 may need to switch threads), so do any frame handling before
11060 frame
= get_selected_frame (NULL
);
11061 frame_gdbarch
= get_frame_arch (frame
);
11062 stack_frame_id
= get_stack_frame_id (frame
);
11063 caller_frame_id
= frame_unwind_caller_id (frame
);
11065 /* Keep within the current frame, or in frames called by the current
11068 breakpoint_up caller_breakpoint
;
11070 gdb::optional
<delete_longjmp_breakpoint_cleanup
> lj_deleter
;
11072 if (frame_id_p (caller_frame_id
))
11074 struct symtab_and_line sal2
;
11075 struct gdbarch
*caller_gdbarch
;
11077 sal2
= find_pc_line (frame_unwind_caller_pc (frame
), 0);
11078 sal2
.pc
= frame_unwind_caller_pc (frame
);
11079 caller_gdbarch
= frame_unwind_caller_arch (frame
);
11080 caller_breakpoint
= set_momentary_breakpoint (caller_gdbarch
,
11085 set_longjmp_breakpoint (tp
, caller_frame_id
);
11086 lj_deleter
.emplace (thread
);
11089 /* set_momentary_breakpoint could invalidate FRAME. */
11092 breakpoint_up location_breakpoint
;
11094 /* If the user told us to continue until a specified location,
11095 we don't specify a frame at which we need to stop. */
11096 location_breakpoint
= set_momentary_breakpoint (frame_gdbarch
, sal
,
11097 null_frame_id
, bp_until
);
11099 /* Otherwise, specify the selected frame, because we want to stop
11100 only at the very same frame. */
11101 location_breakpoint
= set_momentary_breakpoint (frame_gdbarch
, sal
,
11102 stack_frame_id
, bp_until
);
11104 tp
->thread_fsm
= new until_break_fsm (command_interp (), tp
->global_num
,
11105 std::move (location_breakpoint
),
11106 std::move (caller_breakpoint
));
11109 lj_deleter
->release ();
11111 proceed (-1, GDB_SIGNAL_DEFAULT
);
11114 /* This function attempts to parse an optional "if <cond>" clause
11115 from the arg string. If one is not found, it returns NULL.
11117 Else, it returns a pointer to the condition string. (It does not
11118 attempt to evaluate the string against a particular block.) And,
11119 it updates arg to point to the first character following the parsed
11120 if clause in the arg string. */
11123 ep_parse_optional_if_clause (const char **arg
)
11125 const char *cond_string
;
11127 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
11130 /* Skip the "if" keyword. */
11133 /* Skip any extra leading whitespace, and record the start of the
11134 condition string. */
11135 *arg
= skip_spaces (*arg
);
11136 cond_string
= *arg
;
11138 /* Assume that the condition occupies the remainder of the arg
11140 (*arg
) += strlen (cond_string
);
11142 return cond_string
;
11145 /* Commands to deal with catching events, such as signals, exceptions,
11146 process start/exit, etc. */
11150 catch_fork_temporary
, catch_vfork_temporary
,
11151 catch_fork_permanent
, catch_vfork_permanent
11156 catch_fork_command_1 (const char *arg
, int from_tty
,
11157 struct cmd_list_element
*command
)
11159 struct gdbarch
*gdbarch
= get_current_arch ();
11160 const char *cond_string
= NULL
;
11161 catch_fork_kind fork_kind
;
11164 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
11165 tempflag
= (fork_kind
== catch_fork_temporary
11166 || fork_kind
== catch_vfork_temporary
);
11170 arg
= skip_spaces (arg
);
11172 /* The allowed syntax is:
11174 catch [v]fork if <cond>
11176 First, check if there's an if clause. */
11177 cond_string
= ep_parse_optional_if_clause (&arg
);
11179 if ((*arg
!= '\0') && !isspace (*arg
))
11180 error (_("Junk at end of arguments."));
11182 /* If this target supports it, create a fork or vfork catchpoint
11183 and enable reporting of such events. */
11186 case catch_fork_temporary
:
11187 case catch_fork_permanent
:
11188 create_fork_vfork_event_catchpoint (gdbarch
, tempflag
, cond_string
,
11189 &catch_fork_breakpoint_ops
);
11191 case catch_vfork_temporary
:
11192 case catch_vfork_permanent
:
11193 create_fork_vfork_event_catchpoint (gdbarch
, tempflag
, cond_string
,
11194 &catch_vfork_breakpoint_ops
);
11197 error (_("unsupported or unknown fork kind; cannot catch it"));
11203 catch_exec_command_1 (const char *arg
, int from_tty
,
11204 struct cmd_list_element
*command
)
11206 struct gdbarch
*gdbarch
= get_current_arch ();
11208 const char *cond_string
= NULL
;
11210 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
11214 arg
= skip_spaces (arg
);
11216 /* The allowed syntax is:
11218 catch exec if <cond>
11220 First, check if there's an if clause. */
11221 cond_string
= ep_parse_optional_if_clause (&arg
);
11223 if ((*arg
!= '\0') && !isspace (*arg
))
11224 error (_("Junk at end of arguments."));
11226 std::unique_ptr
<exec_catchpoint
> c (new exec_catchpoint ());
11227 init_catchpoint (c
.get (), gdbarch
, tempflag
, cond_string
,
11228 &catch_exec_breakpoint_ops
);
11229 c
->exec_pathname
= NULL
;
11231 install_breakpoint (0, std::move (c
), 1);
11235 init_ada_exception_breakpoint (struct breakpoint
*b
,
11236 struct gdbarch
*gdbarch
,
11237 struct symtab_and_line sal
,
11238 const char *addr_string
,
11239 const struct breakpoint_ops
*ops
,
11246 struct gdbarch
*loc_gdbarch
= get_sal_arch (sal
);
11248 loc_gdbarch
= gdbarch
;
11250 describe_other_breakpoints (loc_gdbarch
,
11251 sal
.pspace
, sal
.pc
, sal
.section
, -1);
11252 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
11253 version for exception catchpoints, because two catchpoints
11254 used for different exception names will use the same address.
11255 In this case, a "breakpoint ... also set at..." warning is
11256 unproductive. Besides, the warning phrasing is also a bit
11257 inappropriate, we should use the word catchpoint, and tell
11258 the user what type of catchpoint it is. The above is good
11259 enough for now, though. */
11262 init_raw_breakpoint (b
, gdbarch
, sal
, bp_breakpoint
, ops
);
11264 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
11265 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
11266 b
->location
= string_to_event_location (&addr_string
,
11267 language_def (language_ada
));
11268 b
->language
= language_ada
;
11272 catch_command (const char *arg
, int from_tty
)
11274 error (_("Catch requires an event name."));
11279 tcatch_command (const char *arg
, int from_tty
)
11281 error (_("Catch requires an event name."));
11284 /* Compare two breakpoints and return a strcmp-like result. */
11287 compare_breakpoints (const breakpoint
*a
, const breakpoint
*b
)
11289 uintptr_t ua
= (uintptr_t) a
;
11290 uintptr_t ub
= (uintptr_t) b
;
11292 if (a
->number
< b
->number
)
11294 else if (a
->number
> b
->number
)
11297 /* Now sort by address, in case we see, e..g, two breakpoints with
11301 return ua
> ub
? 1 : 0;
11304 /* Delete breakpoints by address or line. */
11307 clear_command (const char *arg
, int from_tty
)
11309 struct breakpoint
*b
;
11312 std::vector
<symtab_and_line
> decoded_sals
;
11313 symtab_and_line last_sal
;
11314 gdb::array_view
<symtab_and_line
> sals
;
11318 = decode_line_with_current_source (arg
,
11319 (DECODE_LINE_FUNFIRSTLINE
11320 | DECODE_LINE_LIST_MODE
));
11322 sals
= decoded_sals
;
11326 /* Set sal's line, symtab, pc, and pspace to the values
11327 corresponding to the last call to print_frame_info. If the
11328 codepoint is not valid, this will set all the fields to 0. */
11329 last_sal
= get_last_displayed_sal ();
11330 if (last_sal
.symtab
== 0)
11331 error (_("No source file specified."));
11337 /* We don't call resolve_sal_pc here. That's not as bad as it
11338 seems, because all existing breakpoints typically have both
11339 file/line and pc set. So, if clear is given file/line, we can
11340 match this to existing breakpoint without obtaining pc at all.
11342 We only support clearing given the address explicitly
11343 present in breakpoint table. Say, we've set breakpoint
11344 at file:line. There were several PC values for that file:line,
11345 due to optimization, all in one block.
11347 We've picked one PC value. If "clear" is issued with another
11348 PC corresponding to the same file:line, the breakpoint won't
11349 be cleared. We probably can still clear the breakpoint, but
11350 since the other PC value is never presented to user, user
11351 can only find it by guessing, and it does not seem important
11352 to support that. */
11354 /* For each line spec given, delete bps which correspond to it. Do
11355 it in two passes, solely to preserve the current behavior that
11356 from_tty is forced true if we delete more than one
11359 std::vector
<struct breakpoint
*> found
;
11360 for (const auto &sal
: sals
)
11362 const char *sal_fullname
;
11364 /* If exact pc given, clear bpts at that pc.
11365 If line given (pc == 0), clear all bpts on specified line.
11366 If defaulting, clear all bpts on default line
11369 defaulting sal.pc != 0 tests to do
11374 1 0 <can't happen> */
11376 sal_fullname
= (sal
.symtab
== NULL
11377 ? NULL
: symtab_to_fullname (sal
.symtab
));
11379 /* Find all matching breakpoints and add them to 'found'. */
11380 ALL_BREAKPOINTS (b
)
11383 /* Are we going to delete b? */
11384 if (b
->type
!= bp_none
&& !is_watchpoint (b
))
11386 struct bp_location
*loc
= b
->loc
;
11387 for (; loc
; loc
= loc
->next
)
11389 /* If the user specified file:line, don't allow a PC
11390 match. This matches historical gdb behavior. */
11391 int pc_match
= (!sal
.explicit_line
11393 && (loc
->pspace
== sal
.pspace
)
11394 && (loc
->address
== sal
.pc
)
11395 && (!section_is_overlay (loc
->section
)
11396 || loc
->section
== sal
.section
));
11397 int line_match
= 0;
11399 if ((default_match
|| sal
.explicit_line
)
11400 && loc
->symtab
!= NULL
11401 && sal_fullname
!= NULL
11402 && sal
.pspace
== loc
->pspace
11403 && loc
->line_number
== sal
.line
11404 && filename_cmp (symtab_to_fullname (loc
->symtab
),
11405 sal_fullname
) == 0)
11408 if (pc_match
|| line_match
)
11417 found
.push_back (b
);
11421 /* Now go thru the 'found' chain and delete them. */
11422 if (found
.empty ())
11425 error (_("No breakpoint at %s."), arg
);
11427 error (_("No breakpoint at this line."));
11430 /* Remove duplicates from the vec. */
11431 std::sort (found
.begin (), found
.end (),
11432 [] (const breakpoint
*bp_a
, const breakpoint
*bp_b
)
11434 return compare_breakpoints (bp_a
, bp_b
) < 0;
11436 found
.erase (std::unique (found
.begin (), found
.end (),
11437 [] (const breakpoint
*bp_a
, const breakpoint
*bp_b
)
11439 return compare_breakpoints (bp_a
, bp_b
) == 0;
11443 if (found
.size () > 1)
11444 from_tty
= 1; /* Always report if deleted more than one. */
11447 if (found
.size () == 1)
11448 printf_unfiltered (_("Deleted breakpoint "));
11450 printf_unfiltered (_("Deleted breakpoints "));
11453 for (breakpoint
*iter
: found
)
11456 printf_unfiltered ("%d ", iter
->number
);
11457 delete_breakpoint (iter
);
11460 putchar_unfiltered ('\n');
11463 /* Delete breakpoint in BS if they are `delete' breakpoints and
11464 all breakpoints that are marked for deletion, whether hit or not.
11465 This is called after any breakpoint is hit, or after errors. */
11468 breakpoint_auto_delete (bpstat bs
)
11470 struct breakpoint
*b
, *b_tmp
;
11472 for (; bs
; bs
= bs
->next
)
11473 if (bs
->breakpoint_at
11474 && bs
->breakpoint_at
->disposition
== disp_del
11476 delete_breakpoint (bs
->breakpoint_at
);
11478 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
11480 if (b
->disposition
== disp_del_at_next_stop
)
11481 delete_breakpoint (b
);
11485 /* A comparison function for bp_location AP and BP being interfaced to
11486 qsort. Sort elements primarily by their ADDRESS (no matter what
11487 does breakpoint_address_is_meaningful say for its OWNER),
11488 secondarily by ordering first permanent elements and
11489 terciarily just ensuring the array is sorted stable way despite
11490 qsort being an unstable algorithm. */
11493 bp_locations_compare (const void *ap
, const void *bp
)
11495 const struct bp_location
*a
= *(const struct bp_location
**) ap
;
11496 const struct bp_location
*b
= *(const struct bp_location
**) bp
;
11498 if (a
->address
!= b
->address
)
11499 return (a
->address
> b
->address
) - (a
->address
< b
->address
);
11501 /* Sort locations at the same address by their pspace number, keeping
11502 locations of the same inferior (in a multi-inferior environment)
11505 if (a
->pspace
->num
!= b
->pspace
->num
)
11506 return ((a
->pspace
->num
> b
->pspace
->num
)
11507 - (a
->pspace
->num
< b
->pspace
->num
));
11509 /* Sort permanent breakpoints first. */
11510 if (a
->permanent
!= b
->permanent
)
11511 return (a
->permanent
< b
->permanent
) - (a
->permanent
> b
->permanent
);
11513 /* Make the internal GDB representation stable across GDB runs
11514 where A and B memory inside GDB can differ. Breakpoint locations of
11515 the same type at the same address can be sorted in arbitrary order. */
11517 if (a
->owner
->number
!= b
->owner
->number
)
11518 return ((a
->owner
->number
> b
->owner
->number
)
11519 - (a
->owner
->number
< b
->owner
->number
));
11521 return (a
> b
) - (a
< b
);
11524 /* Set bp_locations_placed_address_before_address_max and
11525 bp_locations_shadow_len_after_address_max according to the current
11526 content of the bp_locations array. */
11529 bp_locations_target_extensions_update (void)
11531 struct bp_location
*bl
, **blp_tmp
;
11533 bp_locations_placed_address_before_address_max
= 0;
11534 bp_locations_shadow_len_after_address_max
= 0;
11536 ALL_BP_LOCATIONS (bl
, blp_tmp
)
11538 CORE_ADDR start
, end
, addr
;
11540 if (!bp_location_has_shadow (bl
))
11543 start
= bl
->target_info
.placed_address
;
11544 end
= start
+ bl
->target_info
.shadow_len
;
11546 gdb_assert (bl
->address
>= start
);
11547 addr
= bl
->address
- start
;
11548 if (addr
> bp_locations_placed_address_before_address_max
)
11549 bp_locations_placed_address_before_address_max
= addr
;
11551 /* Zero SHADOW_LEN would not pass bp_location_has_shadow. */
11553 gdb_assert (bl
->address
< end
);
11554 addr
= end
- bl
->address
;
11555 if (addr
> bp_locations_shadow_len_after_address_max
)
11556 bp_locations_shadow_len_after_address_max
= addr
;
11560 /* Download tracepoint locations if they haven't been. */
11563 download_tracepoint_locations (void)
11565 struct breakpoint
*b
;
11566 enum tribool can_download_tracepoint
= TRIBOOL_UNKNOWN
;
11568 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
11570 ALL_TRACEPOINTS (b
)
11572 struct bp_location
*bl
;
11573 struct tracepoint
*t
;
11574 int bp_location_downloaded
= 0;
11576 if ((b
->type
== bp_fast_tracepoint
11577 ? !may_insert_fast_tracepoints
11578 : !may_insert_tracepoints
))
11581 if (can_download_tracepoint
== TRIBOOL_UNKNOWN
)
11583 if (target_can_download_tracepoint ())
11584 can_download_tracepoint
= TRIBOOL_TRUE
;
11586 can_download_tracepoint
= TRIBOOL_FALSE
;
11589 if (can_download_tracepoint
== TRIBOOL_FALSE
)
11592 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
11594 /* In tracepoint, locations are _never_ duplicated, so
11595 should_be_inserted is equivalent to
11596 unduplicated_should_be_inserted. */
11597 if (!should_be_inserted (bl
) || bl
->inserted
)
11600 switch_to_program_space_and_thread (bl
->pspace
);
11602 target_download_tracepoint (bl
);
11605 bp_location_downloaded
= 1;
11607 t
= (struct tracepoint
*) b
;
11608 t
->number_on_target
= b
->number
;
11609 if (bp_location_downloaded
)
11610 gdb::observers::breakpoint_modified
.notify (b
);
11614 /* Swap the insertion/duplication state between two locations. */
11617 swap_insertion (struct bp_location
*left
, struct bp_location
*right
)
11619 const int left_inserted
= left
->inserted
;
11620 const int left_duplicate
= left
->duplicate
;
11621 const int left_needs_update
= left
->needs_update
;
11622 const struct bp_target_info left_target_info
= left
->target_info
;
11624 /* Locations of tracepoints can never be duplicated. */
11625 if (is_tracepoint (left
->owner
))
11626 gdb_assert (!left
->duplicate
);
11627 if (is_tracepoint (right
->owner
))
11628 gdb_assert (!right
->duplicate
);
11630 left
->inserted
= right
->inserted
;
11631 left
->duplicate
= right
->duplicate
;
11632 left
->needs_update
= right
->needs_update
;
11633 left
->target_info
= right
->target_info
;
11634 right
->inserted
= left_inserted
;
11635 right
->duplicate
= left_duplicate
;
11636 right
->needs_update
= left_needs_update
;
11637 right
->target_info
= left_target_info
;
11640 /* Force the re-insertion of the locations at ADDRESS. This is called
11641 once a new/deleted/modified duplicate location is found and we are evaluating
11642 conditions on the target's side. Such conditions need to be updated on
11646 force_breakpoint_reinsertion (struct bp_location
*bl
)
11648 struct bp_location
**locp
= NULL
, **loc2p
;
11649 struct bp_location
*loc
;
11650 CORE_ADDR address
= 0;
11653 address
= bl
->address
;
11654 pspace_num
= bl
->pspace
->num
;
11656 /* This is only meaningful if the target is
11657 evaluating conditions and if the user has
11658 opted for condition evaluation on the target's
11660 if (gdb_evaluates_breakpoint_condition_p ()
11661 || !target_supports_evaluation_of_breakpoint_conditions ())
11664 /* Flag all breakpoint locations with this address and
11665 the same program space as the location
11666 as "its condition has changed". We need to
11667 update the conditions on the target's side. */
11668 ALL_BP_LOCATIONS_AT_ADDR (loc2p
, locp
, address
)
11672 if (!is_breakpoint (loc
->owner
)
11673 || pspace_num
!= loc
->pspace
->num
)
11676 /* Flag the location appropriately. We use a different state to
11677 let everyone know that we already updated the set of locations
11678 with addr bl->address and program space bl->pspace. This is so
11679 we don't have to keep calling these functions just to mark locations
11680 that have already been marked. */
11681 loc
->condition_changed
= condition_updated
;
11683 /* Free the agent expression bytecode as well. We will compute
11685 loc
->cond_bytecode
.reset ();
11688 /* Called whether new breakpoints are created, or existing breakpoints
11689 deleted, to update the global location list and recompute which
11690 locations are duplicate of which.
11692 The INSERT_MODE flag determines whether locations may not, may, or
11693 shall be inserted now. See 'enum ugll_insert_mode' for more
11697 update_global_location_list (enum ugll_insert_mode insert_mode
)
11699 struct breakpoint
*b
;
11700 struct bp_location
**locp
, *loc
;
11701 /* Last breakpoint location address that was marked for update. */
11702 CORE_ADDR last_addr
= 0;
11703 /* Last breakpoint location program space that was marked for update. */
11704 int last_pspace_num
= -1;
11706 /* Used in the duplicates detection below. When iterating over all
11707 bp_locations, points to the first bp_location of a given address.
11708 Breakpoints and watchpoints of different types are never
11709 duplicates of each other. Keep one pointer for each type of
11710 breakpoint/watchpoint, so we only need to loop over all locations
11712 struct bp_location
*bp_loc_first
; /* breakpoint */
11713 struct bp_location
*wp_loc_first
; /* hardware watchpoint */
11714 struct bp_location
*awp_loc_first
; /* access watchpoint */
11715 struct bp_location
*rwp_loc_first
; /* read watchpoint */
11717 /* Saved former bp_locations array which we compare against the newly
11718 built bp_locations from the current state of ALL_BREAKPOINTS. */
11719 struct bp_location
**old_locp
;
11720 unsigned old_locations_count
;
11721 gdb::unique_xmalloc_ptr
<struct bp_location
*> old_locations (bp_locations
);
11723 old_locations_count
= bp_locations_count
;
11724 bp_locations
= NULL
;
11725 bp_locations_count
= 0;
11727 ALL_BREAKPOINTS (b
)
11728 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
11729 bp_locations_count
++;
11731 bp_locations
= XNEWVEC (struct bp_location
*, bp_locations_count
);
11732 locp
= bp_locations
;
11733 ALL_BREAKPOINTS (b
)
11734 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
11736 qsort (bp_locations
, bp_locations_count
, sizeof (*bp_locations
),
11737 bp_locations_compare
);
11739 bp_locations_target_extensions_update ();
11741 /* Identify bp_location instances that are no longer present in the
11742 new list, and therefore should be freed. Note that it's not
11743 necessary that those locations should be removed from inferior --
11744 if there's another location at the same address (previously
11745 marked as duplicate), we don't need to remove/insert the
11748 LOCP is kept in sync with OLD_LOCP, each pointing to the current
11749 and former bp_location array state respectively. */
11751 locp
= bp_locations
;
11752 for (old_locp
= old_locations
.get ();
11753 old_locp
< old_locations
.get () + old_locations_count
;
11756 struct bp_location
*old_loc
= *old_locp
;
11757 struct bp_location
**loc2p
;
11759 /* Tells if 'old_loc' is found among the new locations. If
11760 not, we have to free it. */
11761 int found_object
= 0;
11762 /* Tells if the location should remain inserted in the target. */
11763 int keep_in_target
= 0;
11766 /* Skip LOCP entries which will definitely never be needed.
11767 Stop either at or being the one matching OLD_LOC. */
11768 while (locp
< bp_locations
+ bp_locations_count
11769 && (*locp
)->address
< old_loc
->address
)
11773 (loc2p
< bp_locations
+ bp_locations_count
11774 && (*loc2p
)->address
== old_loc
->address
);
11777 /* Check if this is a new/duplicated location or a duplicated
11778 location that had its condition modified. If so, we want to send
11779 its condition to the target if evaluation of conditions is taking
11781 if ((*loc2p
)->condition_changed
== condition_modified
11782 && (last_addr
!= old_loc
->address
11783 || last_pspace_num
!= old_loc
->pspace
->num
))
11785 force_breakpoint_reinsertion (*loc2p
);
11786 last_pspace_num
= old_loc
->pspace
->num
;
11789 if (*loc2p
== old_loc
)
11793 /* We have already handled this address, update it so that we don't
11794 have to go through updates again. */
11795 last_addr
= old_loc
->address
;
11797 /* Target-side condition evaluation: Handle deleted locations. */
11799 force_breakpoint_reinsertion (old_loc
);
11801 /* If this location is no longer present, and inserted, look if
11802 there's maybe a new location at the same address. If so,
11803 mark that one inserted, and don't remove this one. This is
11804 needed so that we don't have a time window where a breakpoint
11805 at certain location is not inserted. */
11807 if (old_loc
->inserted
)
11809 /* If the location is inserted now, we might have to remove
11812 if (found_object
&& should_be_inserted (old_loc
))
11814 /* The location is still present in the location list,
11815 and still should be inserted. Don't do anything. */
11816 keep_in_target
= 1;
11820 /* This location still exists, but it won't be kept in the
11821 target since it may have been disabled. We proceed to
11822 remove its target-side condition. */
11824 /* The location is either no longer present, or got
11825 disabled. See if there's another location at the
11826 same address, in which case we don't need to remove
11827 this one from the target. */
11829 /* OLD_LOC comes from existing struct breakpoint. */
11830 if (breakpoint_address_is_meaningful (old_loc
->owner
))
11833 (loc2p
< bp_locations
+ bp_locations_count
11834 && (*loc2p
)->address
== old_loc
->address
);
11837 struct bp_location
*loc2
= *loc2p
;
11839 if (breakpoint_locations_match (loc2
, old_loc
))
11841 /* Read watchpoint locations are switched to
11842 access watchpoints, if the former are not
11843 supported, but the latter are. */
11844 if (is_hardware_watchpoint (old_loc
->owner
))
11846 gdb_assert (is_hardware_watchpoint (loc2
->owner
));
11847 loc2
->watchpoint_type
= old_loc
->watchpoint_type
;
11850 /* loc2 is a duplicated location. We need to check
11851 if it should be inserted in case it will be
11853 if (loc2
!= old_loc
11854 && unduplicated_should_be_inserted (loc2
))
11856 swap_insertion (old_loc
, loc2
);
11857 keep_in_target
= 1;
11865 if (!keep_in_target
)
11867 if (remove_breakpoint (old_loc
))
11869 /* This is just about all we can do. We could keep
11870 this location on the global list, and try to
11871 remove it next time, but there's no particular
11872 reason why we will succeed next time.
11874 Note that at this point, old_loc->owner is still
11875 valid, as delete_breakpoint frees the breakpoint
11876 only after calling us. */
11877 printf_filtered (_("warning: Error removing "
11878 "breakpoint %d\n"),
11879 old_loc
->owner
->number
);
11887 if (removed
&& target_is_non_stop_p ()
11888 && need_moribund_for_location_type (old_loc
))
11890 /* This location was removed from the target. In
11891 non-stop mode, a race condition is possible where
11892 we've removed a breakpoint, but stop events for that
11893 breakpoint are already queued and will arrive later.
11894 We apply an heuristic to be able to distinguish such
11895 SIGTRAPs from other random SIGTRAPs: we keep this
11896 breakpoint location for a bit, and will retire it
11897 after we see some number of events. The theory here
11898 is that reporting of events should, "on the average",
11899 be fair, so after a while we'll see events from all
11900 threads that have anything of interest, and no longer
11901 need to keep this breakpoint location around. We
11902 don't hold locations forever so to reduce chances of
11903 mistaking a non-breakpoint SIGTRAP for a breakpoint
11906 The heuristic failing can be disastrous on
11907 decr_pc_after_break targets.
11909 On decr_pc_after_break targets, like e.g., x86-linux,
11910 if we fail to recognize a late breakpoint SIGTRAP,
11911 because events_till_retirement has reached 0 too
11912 soon, we'll fail to do the PC adjustment, and report
11913 a random SIGTRAP to the user. When the user resumes
11914 the inferior, it will most likely immediately crash
11915 with SIGILL/SIGBUS/SIGSEGV, or worse, get silently
11916 corrupted, because of being resumed e.g., in the
11917 middle of a multi-byte instruction, or skipped a
11918 one-byte instruction. This was actually seen happen
11919 on native x86-linux, and should be less rare on
11920 targets that do not support new thread events, like
11921 remote, due to the heuristic depending on
11924 Mistaking a random SIGTRAP for a breakpoint trap
11925 causes similar symptoms (PC adjustment applied when
11926 it shouldn't), but then again, playing with SIGTRAPs
11927 behind the debugger's back is asking for trouble.
11929 Since hardware watchpoint traps are always
11930 distinguishable from other traps, so we don't need to
11931 apply keep hardware watchpoint moribund locations
11932 around. We simply always ignore hardware watchpoint
11933 traps we can no longer explain. */
11935 old_loc
->events_till_retirement
= 3 * (thread_count () + 1);
11936 old_loc
->owner
= NULL
;
11938 moribund_locations
.push_back (old_loc
);
11942 old_loc
->owner
= NULL
;
11943 decref_bp_location (&old_loc
);
11948 /* Rescan breakpoints at the same address and section, marking the
11949 first one as "first" and any others as "duplicates". This is so
11950 that the bpt instruction is only inserted once. If we have a
11951 permanent breakpoint at the same place as BPT, make that one the
11952 official one, and the rest as duplicates. Permanent breakpoints
11953 are sorted first for the same address.
11955 Do the same for hardware watchpoints, but also considering the
11956 watchpoint's type (regular/access/read) and length. */
11958 bp_loc_first
= NULL
;
11959 wp_loc_first
= NULL
;
11960 awp_loc_first
= NULL
;
11961 rwp_loc_first
= NULL
;
11962 ALL_BP_LOCATIONS (loc
, locp
)
11964 /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always
11966 struct bp_location
**loc_first_p
;
11969 if (!unduplicated_should_be_inserted (loc
)
11970 || !breakpoint_address_is_meaningful (b
)
11971 /* Don't detect duplicate for tracepoint locations because they are
11972 never duplicated. See the comments in field `duplicate' of
11973 `struct bp_location'. */
11974 || is_tracepoint (b
))
11976 /* Clear the condition modification flag. */
11977 loc
->condition_changed
= condition_unchanged
;
11981 if (b
->type
== bp_hardware_watchpoint
)
11982 loc_first_p
= &wp_loc_first
;
11983 else if (b
->type
== bp_read_watchpoint
)
11984 loc_first_p
= &rwp_loc_first
;
11985 else if (b
->type
== bp_access_watchpoint
)
11986 loc_first_p
= &awp_loc_first
;
11988 loc_first_p
= &bp_loc_first
;
11990 if (*loc_first_p
== NULL
11991 || (overlay_debugging
&& loc
->section
!= (*loc_first_p
)->section
)
11992 || !breakpoint_locations_match (loc
, *loc_first_p
))
11994 *loc_first_p
= loc
;
11995 loc
->duplicate
= 0;
11997 if (is_breakpoint (loc
->owner
) && loc
->condition_changed
)
11999 loc
->needs_update
= 1;
12000 /* Clear the condition modification flag. */
12001 loc
->condition_changed
= condition_unchanged
;
12007 /* This and the above ensure the invariant that the first location
12008 is not duplicated, and is the inserted one.
12009 All following are marked as duplicated, and are not inserted. */
12011 swap_insertion (loc
, *loc_first_p
);
12012 loc
->duplicate
= 1;
12014 /* Clear the condition modification flag. */
12015 loc
->condition_changed
= condition_unchanged
;
12018 if (insert_mode
== UGLL_INSERT
|| breakpoints_should_be_inserted_now ())
12020 if (insert_mode
!= UGLL_DONT_INSERT
)
12021 insert_breakpoint_locations ();
12024 /* Even though the caller told us to not insert new
12025 locations, we may still need to update conditions on the
12026 target's side of breakpoints that were already inserted
12027 if the target is evaluating breakpoint conditions. We
12028 only update conditions for locations that are marked
12030 update_inserted_breakpoint_locations ();
12034 if (insert_mode
!= UGLL_DONT_INSERT
)
12035 download_tracepoint_locations ();
12039 breakpoint_retire_moribund (void)
12041 for (int ix
= 0; ix
< moribund_locations
.size (); ++ix
)
12043 struct bp_location
*loc
= moribund_locations
[ix
];
12044 if (--(loc
->events_till_retirement
) == 0)
12046 decref_bp_location (&loc
);
12047 unordered_remove (moribund_locations
, ix
);
12054 update_global_location_list_nothrow (enum ugll_insert_mode insert_mode
)
12059 update_global_location_list (insert_mode
);
12061 CATCH (e
, RETURN_MASK_ERROR
)
12067 /* Clear BKP from a BPS. */
12070 bpstat_remove_bp_location (bpstat bps
, struct breakpoint
*bpt
)
12074 for (bs
= bps
; bs
; bs
= bs
->next
)
12075 if (bs
->breakpoint_at
== bpt
)
12077 bs
->breakpoint_at
= NULL
;
12078 bs
->old_val
= NULL
;
12079 /* bs->commands will be freed later. */
12083 /* Callback for iterate_over_threads. */
12085 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
12087 struct breakpoint
*bpt
= (struct breakpoint
*) data
;
12089 bpstat_remove_bp_location (th
->control
.stop_bpstat
, bpt
);
12093 /* Helper for breakpoint and tracepoint breakpoint_ops->mention
12097 say_where (struct breakpoint
*b
)
12099 struct value_print_options opts
;
12101 get_user_print_options (&opts
);
12103 /* i18n: cagney/2005-02-11: Below needs to be merged into a
12105 if (b
->loc
== NULL
)
12107 /* For pending locations, the output differs slightly based
12108 on b->extra_string. If this is non-NULL, it contains either
12109 a condition or dprintf arguments. */
12110 if (b
->extra_string
== NULL
)
12112 printf_filtered (_(" (%s) pending."),
12113 event_location_to_string (b
->location
.get ()));
12115 else if (b
->type
== bp_dprintf
)
12117 printf_filtered (_(" (%s,%s) pending."),
12118 event_location_to_string (b
->location
.get ()),
12123 printf_filtered (_(" (%s %s) pending."),
12124 event_location_to_string (b
->location
.get ()),
12130 if (opts
.addressprint
|| b
->loc
->symtab
== NULL
)
12132 printf_filtered (" at ");
12133 fputs_filtered (paddress (b
->loc
->gdbarch
, b
->loc
->address
),
12136 if (b
->loc
->symtab
!= NULL
)
12138 /* If there is a single location, we can print the location
12140 if (b
->loc
->next
== NULL
)
12142 puts_filtered (": file ");
12143 fputs_styled (symtab_to_filename_for_display (b
->loc
->symtab
),
12144 file_name_style
.style (),
12146 printf_filtered (", line %d.",
12147 b
->loc
->line_number
);
12150 /* This is not ideal, but each location may have a
12151 different file name, and this at least reflects the
12152 real situation somewhat. */
12153 printf_filtered (": %s.",
12154 event_location_to_string (b
->location
.get ()));
12159 struct bp_location
*loc
= b
->loc
;
12161 for (; loc
; loc
= loc
->next
)
12163 printf_filtered (" (%d locations)", n
);
12168 /* Default bp_location_ops methods. */
12171 bp_location_dtor (struct bp_location
*self
)
12173 xfree (self
->function_name
);
12176 static const struct bp_location_ops bp_location_ops
=
12181 /* Destructor for the breakpoint base class. */
12183 breakpoint::~breakpoint ()
12185 xfree (this->cond_string
);
12186 xfree (this->extra_string
);
12187 xfree (this->filter
);
12190 static struct bp_location
*
12191 base_breakpoint_allocate_location (struct breakpoint
*self
)
12193 return new bp_location (&bp_location_ops
, self
);
12197 base_breakpoint_re_set (struct breakpoint
*b
)
12199 /* Nothing to re-set. */
12202 #define internal_error_pure_virtual_called() \
12203 gdb_assert_not_reached ("pure virtual function called")
12206 base_breakpoint_insert_location (struct bp_location
*bl
)
12208 internal_error_pure_virtual_called ();
12212 base_breakpoint_remove_location (struct bp_location
*bl
,
12213 enum remove_bp_reason reason
)
12215 internal_error_pure_virtual_called ();
12219 base_breakpoint_breakpoint_hit (const struct bp_location
*bl
,
12220 const address_space
*aspace
,
12222 const struct target_waitstatus
*ws
)
12224 internal_error_pure_virtual_called ();
12228 base_breakpoint_check_status (bpstat bs
)
12233 /* A "works_in_software_mode" breakpoint_ops method that just internal
12237 base_breakpoint_works_in_software_mode (const struct breakpoint
*b
)
12239 internal_error_pure_virtual_called ();
12242 /* A "resources_needed" breakpoint_ops method that just internal
12246 base_breakpoint_resources_needed (const struct bp_location
*bl
)
12248 internal_error_pure_virtual_called ();
12251 static enum print_stop_action
12252 base_breakpoint_print_it (bpstat bs
)
12254 internal_error_pure_virtual_called ();
12258 base_breakpoint_print_one_detail (const struct breakpoint
*self
,
12259 struct ui_out
*uiout
)
12265 base_breakpoint_print_mention (struct breakpoint
*b
)
12267 internal_error_pure_virtual_called ();
12271 base_breakpoint_print_recreate (struct breakpoint
*b
, struct ui_file
*fp
)
12273 internal_error_pure_virtual_called ();
12277 base_breakpoint_create_sals_from_location
12278 (const struct event_location
*location
,
12279 struct linespec_result
*canonical
,
12280 enum bptype type_wanted
)
12282 internal_error_pure_virtual_called ();
12286 base_breakpoint_create_breakpoints_sal (struct gdbarch
*gdbarch
,
12287 struct linespec_result
*c
,
12288 gdb::unique_xmalloc_ptr
<char> cond_string
,
12289 gdb::unique_xmalloc_ptr
<char> extra_string
,
12290 enum bptype type_wanted
,
12291 enum bpdisp disposition
,
12293 int task
, int ignore_count
,
12294 const struct breakpoint_ops
*o
,
12295 int from_tty
, int enabled
,
12296 int internal
, unsigned flags
)
12298 internal_error_pure_virtual_called ();
12301 static std::vector
<symtab_and_line
>
12302 base_breakpoint_decode_location (struct breakpoint
*b
,
12303 const struct event_location
*location
,
12304 struct program_space
*search_pspace
)
12306 internal_error_pure_virtual_called ();
12309 /* The default 'explains_signal' method. */
12312 base_breakpoint_explains_signal (struct breakpoint
*b
, enum gdb_signal sig
)
12317 /* The default "after_condition_true" method. */
12320 base_breakpoint_after_condition_true (struct bpstats
*bs
)
12322 /* Nothing to do. */
12325 struct breakpoint_ops base_breakpoint_ops
=
12327 base_breakpoint_allocate_location
,
12328 base_breakpoint_re_set
,
12329 base_breakpoint_insert_location
,
12330 base_breakpoint_remove_location
,
12331 base_breakpoint_breakpoint_hit
,
12332 base_breakpoint_check_status
,
12333 base_breakpoint_resources_needed
,
12334 base_breakpoint_works_in_software_mode
,
12335 base_breakpoint_print_it
,
12337 base_breakpoint_print_one_detail
,
12338 base_breakpoint_print_mention
,
12339 base_breakpoint_print_recreate
,
12340 base_breakpoint_create_sals_from_location
,
12341 base_breakpoint_create_breakpoints_sal
,
12342 base_breakpoint_decode_location
,
12343 base_breakpoint_explains_signal
,
12344 base_breakpoint_after_condition_true
,
12347 /* Default breakpoint_ops methods. */
12350 bkpt_re_set (struct breakpoint
*b
)
12352 /* FIXME: is this still reachable? */
12353 if (breakpoint_event_location_empty_p (b
))
12355 /* Anything without a location can't be re-set. */
12356 delete_breakpoint (b
);
12360 breakpoint_re_set_default (b
);
12364 bkpt_insert_location (struct bp_location
*bl
)
12366 CORE_ADDR addr
= bl
->target_info
.reqstd_address
;
12368 bl
->target_info
.kind
= breakpoint_kind (bl
, &addr
);
12369 bl
->target_info
.placed_address
= addr
;
12371 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
12372 return target_insert_hw_breakpoint (bl
->gdbarch
, &bl
->target_info
);
12374 return target_insert_breakpoint (bl
->gdbarch
, &bl
->target_info
);
12378 bkpt_remove_location (struct bp_location
*bl
, enum remove_bp_reason reason
)
12380 if (bl
->loc_type
== bp_loc_hardware_breakpoint
)
12381 return target_remove_hw_breakpoint (bl
->gdbarch
, &bl
->target_info
);
12383 return target_remove_breakpoint (bl
->gdbarch
, &bl
->target_info
, reason
);
12387 bkpt_breakpoint_hit (const struct bp_location
*bl
,
12388 const address_space
*aspace
, CORE_ADDR bp_addr
,
12389 const struct target_waitstatus
*ws
)
12391 if (ws
->kind
!= TARGET_WAITKIND_STOPPED
12392 || ws
->value
.sig
!= GDB_SIGNAL_TRAP
)
12395 if (!breakpoint_address_match (bl
->pspace
->aspace
, bl
->address
,
12399 if (overlay_debugging
/* unmapped overlay section */
12400 && section_is_overlay (bl
->section
)
12401 && !section_is_mapped (bl
->section
))
12408 dprintf_breakpoint_hit (const struct bp_location
*bl
,
12409 const address_space
*aspace
, CORE_ADDR bp_addr
,
12410 const struct target_waitstatus
*ws
)
12412 if (dprintf_style
== dprintf_style_agent
12413 && target_can_run_breakpoint_commands ())
12415 /* An agent-style dprintf never causes a stop. If we see a trap
12416 for this address it must be for a breakpoint that happens to
12417 be set at the same address. */
12421 return bkpt_breakpoint_hit (bl
, aspace
, bp_addr
, ws
);
12425 bkpt_resources_needed (const struct bp_location
*bl
)
12427 gdb_assert (bl
->owner
->type
== bp_hardware_breakpoint
);
12432 static enum print_stop_action
12433 bkpt_print_it (bpstat bs
)
12435 struct breakpoint
*b
;
12436 const struct bp_location
*bl
;
12438 struct ui_out
*uiout
= current_uiout
;
12440 gdb_assert (bs
->bp_location_at
!= NULL
);
12442 bl
= bs
->bp_location_at
;
12443 b
= bs
->breakpoint_at
;
12445 bp_temp
= b
->disposition
== disp_del
;
12446 if (bl
->address
!= bl
->requested_address
)
12447 breakpoint_adjustment_warning (bl
->requested_address
,
12450 annotate_breakpoint (b
->number
);
12451 maybe_print_thread_hit_breakpoint (uiout
);
12454 uiout
->text ("Temporary breakpoint ");
12456 uiout
->text ("Breakpoint ");
12457 if (uiout
->is_mi_like_p ())
12459 uiout
->field_string ("reason",
12460 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
12461 uiout
->field_string ("disp", bpdisp_text (b
->disposition
));
12463 uiout
->field_int ("bkptno", b
->number
);
12464 uiout
->text (", ");
12466 return PRINT_SRC_AND_LOC
;
12470 bkpt_print_mention (struct breakpoint
*b
)
12472 if (current_uiout
->is_mi_like_p ())
12477 case bp_breakpoint
:
12478 case bp_gnu_ifunc_resolver
:
12479 if (b
->disposition
== disp_del
)
12480 printf_filtered (_("Temporary breakpoint"));
12482 printf_filtered (_("Breakpoint"));
12483 printf_filtered (_(" %d"), b
->number
);
12484 if (b
->type
== bp_gnu_ifunc_resolver
)
12485 printf_filtered (_(" at gnu-indirect-function resolver"));
12487 case bp_hardware_breakpoint
:
12488 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
12491 printf_filtered (_("Dprintf %d"), b
->number
);
12499 bkpt_print_recreate (struct breakpoint
*tp
, struct ui_file
*fp
)
12501 if (tp
->type
== bp_breakpoint
&& tp
->disposition
== disp_del
)
12502 fprintf_unfiltered (fp
, "tbreak");
12503 else if (tp
->type
== bp_breakpoint
)
12504 fprintf_unfiltered (fp
, "break");
12505 else if (tp
->type
== bp_hardware_breakpoint
12506 && tp
->disposition
== disp_del
)
12507 fprintf_unfiltered (fp
, "thbreak");
12508 else if (tp
->type
== bp_hardware_breakpoint
)
12509 fprintf_unfiltered (fp
, "hbreak");
12511 internal_error (__FILE__
, __LINE__
,
12512 _("unhandled breakpoint type %d"), (int) tp
->type
);
12514 fprintf_unfiltered (fp
, " %s",
12515 event_location_to_string (tp
->location
.get ()));
12517 /* Print out extra_string if this breakpoint is pending. It might
12518 contain, for example, conditions that were set by the user. */
12519 if (tp
->loc
== NULL
&& tp
->extra_string
!= NULL
)
12520 fprintf_unfiltered (fp
, " %s", tp
->extra_string
);
12522 print_recreate_thread (tp
, fp
);
12526 bkpt_create_sals_from_location (const struct event_location
*location
,
12527 struct linespec_result
*canonical
,
12528 enum bptype type_wanted
)
12530 create_sals_from_location_default (location
, canonical
, type_wanted
);
12534 bkpt_create_breakpoints_sal (struct gdbarch
*gdbarch
,
12535 struct linespec_result
*canonical
,
12536 gdb::unique_xmalloc_ptr
<char> cond_string
,
12537 gdb::unique_xmalloc_ptr
<char> extra_string
,
12538 enum bptype type_wanted
,
12539 enum bpdisp disposition
,
12541 int task
, int ignore_count
,
12542 const struct breakpoint_ops
*ops
,
12543 int from_tty
, int enabled
,
12544 int internal
, unsigned flags
)
12546 create_breakpoints_sal_default (gdbarch
, canonical
,
12547 std::move (cond_string
),
12548 std::move (extra_string
),
12550 disposition
, thread
, task
,
12551 ignore_count
, ops
, from_tty
,
12552 enabled
, internal
, flags
);
12555 static std::vector
<symtab_and_line
>
12556 bkpt_decode_location (struct breakpoint
*b
,
12557 const struct event_location
*location
,
12558 struct program_space
*search_pspace
)
12560 return decode_location_default (b
, location
, search_pspace
);
12563 /* Virtual table for internal breakpoints. */
12566 internal_bkpt_re_set (struct breakpoint
*b
)
12570 /* Delete overlay event and longjmp master breakpoints; they
12571 will be reset later by breakpoint_re_set. */
12572 case bp_overlay_event
:
12573 case bp_longjmp_master
:
12574 case bp_std_terminate_master
:
12575 case bp_exception_master
:
12576 delete_breakpoint (b
);
12579 /* This breakpoint is special, it's set up when the inferior
12580 starts and we really don't want to touch it. */
12581 case bp_shlib_event
:
12583 /* Like bp_shlib_event, this breakpoint type is special. Once
12584 it is set up, we do not want to touch it. */
12585 case bp_thread_event
:
12591 internal_bkpt_check_status (bpstat bs
)
12593 if (bs
->breakpoint_at
->type
== bp_shlib_event
)
12595 /* If requested, stop when the dynamic linker notifies GDB of
12596 events. This allows the user to get control and place
12597 breakpoints in initializer routines for dynamically loaded
12598 objects (among other things). */
12599 bs
->stop
= stop_on_solib_events
;
12600 bs
->print
= stop_on_solib_events
;
12606 static enum print_stop_action
12607 internal_bkpt_print_it (bpstat bs
)
12609 struct breakpoint
*b
;
12611 b
= bs
->breakpoint_at
;
12615 case bp_shlib_event
:
12616 /* Did we stop because the user set the stop_on_solib_events
12617 variable? (If so, we report this as a generic, "Stopped due
12618 to shlib event" message.) */
12619 print_solib_event (0);
12622 case bp_thread_event
:
12623 /* Not sure how we will get here.
12624 GDB should not stop for these breakpoints. */
12625 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
12628 case bp_overlay_event
:
12629 /* By analogy with the thread event, GDB should not stop for these. */
12630 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
12633 case bp_longjmp_master
:
12634 /* These should never be enabled. */
12635 printf_filtered (_("Longjmp Master Breakpoint: gdb should not stop!\n"));
12638 case bp_std_terminate_master
:
12639 /* These should never be enabled. */
12640 printf_filtered (_("std::terminate Master Breakpoint: "
12641 "gdb should not stop!\n"));
12644 case bp_exception_master
:
12645 /* These should never be enabled. */
12646 printf_filtered (_("Exception Master Breakpoint: "
12647 "gdb should not stop!\n"));
12651 return PRINT_NOTHING
;
12655 internal_bkpt_print_mention (struct breakpoint
*b
)
12657 /* Nothing to mention. These breakpoints are internal. */
12660 /* Virtual table for momentary breakpoints */
12663 momentary_bkpt_re_set (struct breakpoint
*b
)
12665 /* Keep temporary breakpoints, which can be encountered when we step
12666 over a dlopen call and solib_add is resetting the breakpoints.
12667 Otherwise these should have been blown away via the cleanup chain
12668 or by breakpoint_init_inferior when we rerun the executable. */
12672 momentary_bkpt_check_status (bpstat bs
)
12674 /* Nothing. The point of these breakpoints is causing a stop. */
12677 static enum print_stop_action
12678 momentary_bkpt_print_it (bpstat bs
)
12680 return PRINT_UNKNOWN
;
12684 momentary_bkpt_print_mention (struct breakpoint
*b
)
12686 /* Nothing to mention. These breakpoints are internal. */
12689 /* Ensure INITIATING_FRAME is cleared when no such breakpoint exists.
12691 It gets cleared already on the removal of the first one of such placed
12692 breakpoints. This is OK as they get all removed altogether. */
12694 longjmp_breakpoint::~longjmp_breakpoint ()
12696 thread_info
*tp
= find_thread_global_id (this->thread
);
12699 tp
->initiating_frame
= null_frame_id
;
12702 /* Specific methods for probe breakpoints. */
12705 bkpt_probe_insert_location (struct bp_location
*bl
)
12707 int v
= bkpt_insert_location (bl
);
12711 /* The insertion was successful, now let's set the probe's semaphore
12713 bl
->probe
.prob
->set_semaphore (bl
->probe
.objfile
, bl
->gdbarch
);
12720 bkpt_probe_remove_location (struct bp_location
*bl
,
12721 enum remove_bp_reason reason
)
12723 /* Let's clear the semaphore before removing the location. */
12724 bl
->probe
.prob
->clear_semaphore (bl
->probe
.objfile
, bl
->gdbarch
);
12726 return bkpt_remove_location (bl
, reason
);
12730 bkpt_probe_create_sals_from_location (const struct event_location
*location
,
12731 struct linespec_result
*canonical
,
12732 enum bptype type_wanted
)
12734 struct linespec_sals lsal
;
12736 lsal
.sals
= parse_probes (location
, NULL
, canonical
);
12738 = xstrdup (event_location_to_string (canonical
->location
.get ()));
12739 canonical
->lsals
.push_back (std::move (lsal
));
12742 static std::vector
<symtab_and_line
>
12743 bkpt_probe_decode_location (struct breakpoint
*b
,
12744 const struct event_location
*location
,
12745 struct program_space
*search_pspace
)
12747 std::vector
<symtab_and_line
> sals
= parse_probes (location
, search_pspace
, NULL
);
12749 error (_("probe not found"));
12753 /* The breakpoint_ops structure to be used in tracepoints. */
12756 tracepoint_re_set (struct breakpoint
*b
)
12758 breakpoint_re_set_default (b
);
12762 tracepoint_breakpoint_hit (const struct bp_location
*bl
,
12763 const address_space
*aspace
, CORE_ADDR bp_addr
,
12764 const struct target_waitstatus
*ws
)
12766 /* By definition, the inferior does not report stops at
12772 tracepoint_print_one_detail (const struct breakpoint
*self
,
12773 struct ui_out
*uiout
)
12775 struct tracepoint
*tp
= (struct tracepoint
*) self
;
12776 if (!tp
->static_trace_marker_id
.empty ())
12778 gdb_assert (self
->type
== bp_static_tracepoint
);
12780 uiout
->text ("\tmarker id is ");
12781 uiout
->field_string ("static-tracepoint-marker-string-id",
12782 tp
->static_trace_marker_id
);
12783 uiout
->text ("\n");
12788 tracepoint_print_mention (struct breakpoint
*b
)
12790 if (current_uiout
->is_mi_like_p ())
12795 case bp_tracepoint
:
12796 printf_filtered (_("Tracepoint"));
12797 printf_filtered (_(" %d"), b
->number
);
12799 case bp_fast_tracepoint
:
12800 printf_filtered (_("Fast tracepoint"));
12801 printf_filtered (_(" %d"), b
->number
);
12803 case bp_static_tracepoint
:
12804 printf_filtered (_("Static tracepoint"));
12805 printf_filtered (_(" %d"), b
->number
);
12808 internal_error (__FILE__
, __LINE__
,
12809 _("unhandled tracepoint type %d"), (int) b
->type
);
12816 tracepoint_print_recreate (struct breakpoint
*self
, struct ui_file
*fp
)
12818 struct tracepoint
*tp
= (struct tracepoint
*) self
;
12820 if (self
->type
== bp_fast_tracepoint
)
12821 fprintf_unfiltered (fp
, "ftrace");
12822 else if (self
->type
== bp_static_tracepoint
)
12823 fprintf_unfiltered (fp
, "strace");
12824 else if (self
->type
== bp_tracepoint
)
12825 fprintf_unfiltered (fp
, "trace");
12827 internal_error (__FILE__
, __LINE__
,
12828 _("unhandled tracepoint type %d"), (int) self
->type
);
12830 fprintf_unfiltered (fp
, " %s",
12831 event_location_to_string (self
->location
.get ()));
12832 print_recreate_thread (self
, fp
);
12834 if (tp
->pass_count
)
12835 fprintf_unfiltered (fp
, " passcount %d\n", tp
->pass_count
);
12839 tracepoint_create_sals_from_location (const struct event_location
*location
,
12840 struct linespec_result
*canonical
,
12841 enum bptype type_wanted
)
12843 create_sals_from_location_default (location
, canonical
, type_wanted
);
12847 tracepoint_create_breakpoints_sal (struct gdbarch
*gdbarch
,
12848 struct linespec_result
*canonical
,
12849 gdb::unique_xmalloc_ptr
<char> cond_string
,
12850 gdb::unique_xmalloc_ptr
<char> extra_string
,
12851 enum bptype type_wanted
,
12852 enum bpdisp disposition
,
12854 int task
, int ignore_count
,
12855 const struct breakpoint_ops
*ops
,
12856 int from_tty
, int enabled
,
12857 int internal
, unsigned flags
)
12859 create_breakpoints_sal_default (gdbarch
, canonical
,
12860 std::move (cond_string
),
12861 std::move (extra_string
),
12863 disposition
, thread
, task
,
12864 ignore_count
, ops
, from_tty
,
12865 enabled
, internal
, flags
);
12868 static std::vector
<symtab_and_line
>
12869 tracepoint_decode_location (struct breakpoint
*b
,
12870 const struct event_location
*location
,
12871 struct program_space
*search_pspace
)
12873 return decode_location_default (b
, location
, search_pspace
);
12876 struct breakpoint_ops tracepoint_breakpoint_ops
;
12878 /* The breakpoint_ops structure to be use on tracepoints placed in a
12882 tracepoint_probe_create_sals_from_location
12883 (const struct event_location
*location
,
12884 struct linespec_result
*canonical
,
12885 enum bptype type_wanted
)
12887 /* We use the same method for breakpoint on probes. */
12888 bkpt_probe_create_sals_from_location (location
, canonical
, type_wanted
);
12891 static std::vector
<symtab_and_line
>
12892 tracepoint_probe_decode_location (struct breakpoint
*b
,
12893 const struct event_location
*location
,
12894 struct program_space
*search_pspace
)
12896 /* We use the same method for breakpoint on probes. */
12897 return bkpt_probe_decode_location (b
, location
, search_pspace
);
12900 static struct breakpoint_ops tracepoint_probe_breakpoint_ops
;
12902 /* Dprintf breakpoint_ops methods. */
12905 dprintf_re_set (struct breakpoint
*b
)
12907 breakpoint_re_set_default (b
);
12909 /* extra_string should never be non-NULL for dprintf. */
12910 gdb_assert (b
->extra_string
!= NULL
);
12912 /* 1 - connect to target 1, that can run breakpoint commands.
12913 2 - create a dprintf, which resolves fine.
12914 3 - disconnect from target 1
12915 4 - connect to target 2, that can NOT run breakpoint commands.
12917 After steps #3/#4, you'll want the dprintf command list to
12918 be updated, because target 1 and 2 may well return different
12919 answers for target_can_run_breakpoint_commands().
12920 Given absence of finer grained resetting, we get to do
12921 it all the time. */
12922 if (b
->extra_string
!= NULL
)
12923 update_dprintf_command_list (b
);
12926 /* Implement the "print_recreate" breakpoint_ops method for dprintf. */
12929 dprintf_print_recreate (struct breakpoint
*tp
, struct ui_file
*fp
)
12931 fprintf_unfiltered (fp
, "dprintf %s,%s",
12932 event_location_to_string (tp
->location
.get ()),
12934 print_recreate_thread (tp
, fp
);
12937 /* Implement the "after_condition_true" breakpoint_ops method for
12940 dprintf's are implemented with regular commands in their command
12941 list, but we run the commands here instead of before presenting the
12942 stop to the user, as dprintf's don't actually cause a stop. This
12943 also makes it so that the commands of multiple dprintfs at the same
12944 address are all handled. */
12947 dprintf_after_condition_true (struct bpstats
*bs
)
12949 struct bpstats tmp_bs
;
12950 struct bpstats
*tmp_bs_p
= &tmp_bs
;
12952 /* dprintf's never cause a stop. This wasn't set in the
12953 check_status hook instead because that would make the dprintf's
12954 condition not be evaluated. */
12957 /* Run the command list here. Take ownership of it instead of
12958 copying. We never want these commands to run later in
12959 bpstat_do_actions, if a breakpoint that causes a stop happens to
12960 be set at same address as this dprintf, or even if running the
12961 commands here throws. */
12962 tmp_bs
.commands
= bs
->commands
;
12963 bs
->commands
= NULL
;
12965 bpstat_do_actions_1 (&tmp_bs_p
);
12967 /* 'tmp_bs.commands' will usually be NULL by now, but
12968 bpstat_do_actions_1 may return early without processing the whole
12972 /* The breakpoint_ops structure to be used on static tracepoints with
12976 strace_marker_create_sals_from_location (const struct event_location
*location
,
12977 struct linespec_result
*canonical
,
12978 enum bptype type_wanted
)
12980 struct linespec_sals lsal
;
12981 const char *arg_start
, *arg
;
12983 arg
= arg_start
= get_linespec_location (location
)->spec_string
;
12984 lsal
.sals
= decode_static_tracepoint_spec (&arg
);
12986 std::string
str (arg_start
, arg
- arg_start
);
12987 const char *ptr
= str
.c_str ();
12988 canonical
->location
12989 = new_linespec_location (&ptr
, symbol_name_match_type::FULL
);
12992 = xstrdup (event_location_to_string (canonical
->location
.get ()));
12993 canonical
->lsals
.push_back (std::move (lsal
));
12997 strace_marker_create_breakpoints_sal (struct gdbarch
*gdbarch
,
12998 struct linespec_result
*canonical
,
12999 gdb::unique_xmalloc_ptr
<char> cond_string
,
13000 gdb::unique_xmalloc_ptr
<char> extra_string
,
13001 enum bptype type_wanted
,
13002 enum bpdisp disposition
,
13004 int task
, int ignore_count
,
13005 const struct breakpoint_ops
*ops
,
13006 int from_tty
, int enabled
,
13007 int internal
, unsigned flags
)
13009 const linespec_sals
&lsal
= canonical
->lsals
[0];
13011 /* If the user is creating a static tracepoint by marker id
13012 (strace -m MARKER_ID), then store the sals index, so that
13013 breakpoint_re_set can try to match up which of the newly
13014 found markers corresponds to this one, and, don't try to
13015 expand multiple locations for each sal, given than SALS
13016 already should contain all sals for MARKER_ID. */
13018 for (size_t i
= 0; i
< lsal
.sals
.size (); i
++)
13020 event_location_up location
13021 = copy_event_location (canonical
->location
.get ());
13023 std::unique_ptr
<tracepoint
> tp (new tracepoint ());
13024 init_breakpoint_sal (tp
.get (), gdbarch
, lsal
.sals
[i
],
13025 std::move (location
), NULL
,
13026 std::move (cond_string
),
13027 std::move (extra_string
),
13028 type_wanted
, disposition
,
13029 thread
, task
, ignore_count
, ops
,
13030 from_tty
, enabled
, internal
, flags
,
13031 canonical
->special_display
);
13032 /* Given that its possible to have multiple markers with
13033 the same string id, if the user is creating a static
13034 tracepoint by marker id ("strace -m MARKER_ID"), then
13035 store the sals index, so that breakpoint_re_set can
13036 try to match up which of the newly found markers
13037 corresponds to this one */
13038 tp
->static_trace_marker_id_idx
= i
;
13040 install_breakpoint (internal
, std::move (tp
), 0);
13044 static std::vector
<symtab_and_line
>
13045 strace_marker_decode_location (struct breakpoint
*b
,
13046 const struct event_location
*location
,
13047 struct program_space
*search_pspace
)
13049 struct tracepoint
*tp
= (struct tracepoint
*) b
;
13050 const char *s
= get_linespec_location (location
)->spec_string
;
13052 std::vector
<symtab_and_line
> sals
= decode_static_tracepoint_spec (&s
);
13053 if (sals
.size () > tp
->static_trace_marker_id_idx
)
13055 sals
[0] = sals
[tp
->static_trace_marker_id_idx
];
13060 error (_("marker %s not found"), tp
->static_trace_marker_id
.c_str ());
13063 static struct breakpoint_ops strace_marker_breakpoint_ops
;
13066 strace_marker_p (struct breakpoint
*b
)
13068 return b
->ops
== &strace_marker_breakpoint_ops
;
13071 /* Delete a breakpoint and clean up all traces of it in the data
13075 delete_breakpoint (struct breakpoint
*bpt
)
13077 struct breakpoint
*b
;
13079 gdb_assert (bpt
!= NULL
);
13081 /* Has this bp already been deleted? This can happen because
13082 multiple lists can hold pointers to bp's. bpstat lists are
13085 One example of this happening is a watchpoint's scope bp. When
13086 the scope bp triggers, we notice that the watchpoint is out of
13087 scope, and delete it. We also delete its scope bp. But the
13088 scope bp is marked "auto-deleting", and is already on a bpstat.
13089 That bpstat is then checked for auto-deleting bp's, which are
13092 A real solution to this problem might involve reference counts in
13093 bp's, and/or giving them pointers back to their referencing
13094 bpstat's, and teaching delete_breakpoint to only free a bp's
13095 storage when no more references were extent. A cheaper bandaid
13097 if (bpt
->type
== bp_none
)
13100 /* At least avoid this stale reference until the reference counting
13101 of breakpoints gets resolved. */
13102 if (bpt
->related_breakpoint
!= bpt
)
13104 struct breakpoint
*related
;
13105 struct watchpoint
*w
;
13107 if (bpt
->type
== bp_watchpoint_scope
)
13108 w
= (struct watchpoint
*) bpt
->related_breakpoint
;
13109 else if (bpt
->related_breakpoint
->type
== bp_watchpoint_scope
)
13110 w
= (struct watchpoint
*) bpt
;
13114 watchpoint_del_at_next_stop (w
);
13116 /* Unlink bpt from the bpt->related_breakpoint ring. */
13117 for (related
= bpt
; related
->related_breakpoint
!= bpt
;
13118 related
= related
->related_breakpoint
);
13119 related
->related_breakpoint
= bpt
->related_breakpoint
;
13120 bpt
->related_breakpoint
= bpt
;
13123 /* watch_command_1 creates a watchpoint but only sets its number if
13124 update_watchpoint succeeds in creating its bp_locations. If there's
13125 a problem in that process, we'll be asked to delete the half-created
13126 watchpoint. In that case, don't announce the deletion. */
13128 gdb::observers::breakpoint_deleted
.notify (bpt
);
13130 if (breakpoint_chain
== bpt
)
13131 breakpoint_chain
= bpt
->next
;
13133 ALL_BREAKPOINTS (b
)
13134 if (b
->next
== bpt
)
13136 b
->next
= bpt
->next
;
13140 /* Be sure no bpstat's are pointing at the breakpoint after it's
13142 /* FIXME, how can we find all bpstat's? We just check stop_bpstat
13143 in all threads for now. Note that we cannot just remove bpstats
13144 pointing at bpt from the stop_bpstat list entirely, as breakpoint
13145 commands are associated with the bpstat; if we remove it here,
13146 then the later call to bpstat_do_actions (&stop_bpstat); in
13147 event-top.c won't do anything, and temporary breakpoints with
13148 commands won't work. */
13150 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
13152 /* Now that breakpoint is removed from breakpoint list, update the
13153 global location list. This will remove locations that used to
13154 belong to this breakpoint. Do this before freeing the breakpoint
13155 itself, since remove_breakpoint looks at location's owner. It
13156 might be better design to have location completely
13157 self-contained, but it's not the case now. */
13158 update_global_location_list (UGLL_DONT_INSERT
);
13160 /* On the chance that someone will soon try again to delete this
13161 same bp, we mark it as deleted before freeing its storage. */
13162 bpt
->type
= bp_none
;
13166 /* Iterator function to call a user-provided callback function once
13167 for each of B and its related breakpoints. */
13170 iterate_over_related_breakpoints (struct breakpoint
*b
,
13171 gdb::function_view
<void (breakpoint
*)> function
)
13173 struct breakpoint
*related
;
13178 struct breakpoint
*next
;
13180 /* FUNCTION may delete RELATED. */
13181 next
= related
->related_breakpoint
;
13183 if (next
== related
)
13185 /* RELATED is the last ring entry. */
13186 function (related
);
13188 /* FUNCTION may have deleted it, so we'd never reach back to
13189 B. There's nothing left to do anyway, so just break
13194 function (related
);
13198 while (related
!= b
);
13202 delete_command (const char *arg
, int from_tty
)
13204 struct breakpoint
*b
, *b_tmp
;
13210 int breaks_to_delete
= 0;
13212 /* Delete all breakpoints if no argument. Do not delete
13213 internal breakpoints, these have to be deleted with an
13214 explicit breakpoint number argument. */
13215 ALL_BREAKPOINTS (b
)
13216 if (user_breakpoint_p (b
))
13218 breaks_to_delete
= 1;
13222 /* Ask user only if there are some breakpoints to delete. */
13224 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
13226 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
13227 if (user_breakpoint_p (b
))
13228 delete_breakpoint (b
);
13232 map_breakpoint_numbers
13233 (arg
, [&] (breakpoint
*br
)
13235 iterate_over_related_breakpoints (br
, delete_breakpoint
);
13239 /* Return true if all locations of B bound to PSPACE are pending. If
13240 PSPACE is NULL, all locations of all program spaces are
13244 all_locations_are_pending (struct breakpoint
*b
, struct program_space
*pspace
)
13246 struct bp_location
*loc
;
13248 for (loc
= b
->loc
; loc
!= NULL
; loc
= loc
->next
)
13249 if ((pspace
== NULL
13250 || loc
->pspace
== pspace
)
13251 && !loc
->shlib_disabled
13252 && !loc
->pspace
->executing_startup
)
13257 /* Subroutine of update_breakpoint_locations to simplify it.
13258 Return non-zero if multiple fns in list LOC have the same name.
13259 Null names are ignored. */
13262 ambiguous_names_p (struct bp_location
*loc
)
13264 struct bp_location
*l
;
13265 htab_t htab
= htab_create_alloc (13, htab_hash_string
, streq_hash
, NULL
,
13268 for (l
= loc
; l
!= NULL
; l
= l
->next
)
13271 const char *name
= l
->function_name
;
13273 /* Allow for some names to be NULL, ignore them. */
13277 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
13279 /* NOTE: We can assume slot != NULL here because xcalloc never
13283 htab_delete (htab
);
13289 htab_delete (htab
);
13293 /* When symbols change, it probably means the sources changed as well,
13294 and it might mean the static tracepoint markers are no longer at
13295 the same address or line numbers they used to be at last we
13296 checked. Losing your static tracepoints whenever you rebuild is
13297 undesirable. This function tries to resync/rematch gdb static
13298 tracepoints with the markers on the target, for static tracepoints
13299 that have not been set by marker id. Static tracepoint that have
13300 been set by marker id are reset by marker id in breakpoint_re_set.
13303 1) For a tracepoint set at a specific address, look for a marker at
13304 the old PC. If one is found there, assume to be the same marker.
13305 If the name / string id of the marker found is different from the
13306 previous known name, assume that means the user renamed the marker
13307 in the sources, and output a warning.
13309 2) For a tracepoint set at a given line number, look for a marker
13310 at the new address of the old line number. If one is found there,
13311 assume to be the same marker. If the name / string id of the
13312 marker found is different from the previous known name, assume that
13313 means the user renamed the marker in the sources, and output a
13316 3) If a marker is no longer found at the same address or line, it
13317 may mean the marker no longer exists. But it may also just mean
13318 the code changed a bit. Maybe the user added a few lines of code
13319 that made the marker move up or down (in line number terms). Ask
13320 the target for info about the marker with the string id as we knew
13321 it. If found, update line number and address in the matching
13322 static tracepoint. This will get confused if there's more than one
13323 marker with the same ID (possible in UST, although unadvised
13324 precisely because it confuses tools). */
13326 static struct symtab_and_line
13327 update_static_tracepoint (struct breakpoint
*b
, struct symtab_and_line sal
)
13329 struct tracepoint
*tp
= (struct tracepoint
*) b
;
13330 struct static_tracepoint_marker marker
;
13335 find_line_pc (sal
.symtab
, sal
.line
, &pc
);
13337 if (target_static_tracepoint_marker_at (pc
, &marker
))
13339 if (tp
->static_trace_marker_id
!= marker
.str_id
)
13340 warning (_("static tracepoint %d changed probed marker from %s to %s"),
13341 b
->number
, tp
->static_trace_marker_id
.c_str (),
13342 marker
.str_id
.c_str ());
13344 tp
->static_trace_marker_id
= std::move (marker
.str_id
);
13349 /* Old marker wasn't found on target at lineno. Try looking it up
13351 if (!sal
.explicit_pc
13353 && sal
.symtab
!= NULL
13354 && !tp
->static_trace_marker_id
.empty ())
13356 std::vector
<static_tracepoint_marker
> markers
13357 = target_static_tracepoint_markers_by_strid
13358 (tp
->static_trace_marker_id
.c_str ());
13360 if (!markers
.empty ())
13362 struct symbol
*sym
;
13363 struct static_tracepoint_marker
*tpmarker
;
13364 struct ui_out
*uiout
= current_uiout
;
13365 struct explicit_location explicit_loc
;
13367 tpmarker
= &markers
[0];
13369 tp
->static_trace_marker_id
= std::move (tpmarker
->str_id
);
13371 warning (_("marker for static tracepoint %d (%s) not "
13372 "found at previous line number"),
13373 b
->number
, tp
->static_trace_marker_id
.c_str ());
13375 symtab_and_line sal2
= find_pc_line (tpmarker
->address
, 0);
13376 sym
= find_pc_sect_function (tpmarker
->address
, NULL
);
13377 uiout
->text ("Now in ");
13380 uiout
->field_string ("func", SYMBOL_PRINT_NAME (sym
),
13381 ui_out_style_kind::FUNCTION
);
13382 uiout
->text (" at ");
13384 uiout
->field_string ("file",
13385 symtab_to_filename_for_display (sal2
.symtab
),
13386 ui_out_style_kind::FILE);
13389 if (uiout
->is_mi_like_p ())
13391 const char *fullname
= symtab_to_fullname (sal2
.symtab
);
13393 uiout
->field_string ("fullname", fullname
);
13396 uiout
->field_int ("line", sal2
.line
);
13397 uiout
->text ("\n");
13399 b
->loc
->line_number
= sal2
.line
;
13400 b
->loc
->symtab
= sym
!= NULL
? sal2
.symtab
: NULL
;
13402 b
->location
.reset (NULL
);
13403 initialize_explicit_location (&explicit_loc
);
13404 explicit_loc
.source_filename
13405 = ASTRDUP (symtab_to_filename_for_display (sal2
.symtab
));
13406 explicit_loc
.line_offset
.offset
= b
->loc
->line_number
;
13407 explicit_loc
.line_offset
.sign
= LINE_OFFSET_NONE
;
13408 b
->location
= new_explicit_location (&explicit_loc
);
13410 /* Might be nice to check if function changed, and warn if
13417 /* Returns 1 iff locations A and B are sufficiently same that
13418 we don't need to report breakpoint as changed. */
13421 locations_are_equal (struct bp_location
*a
, struct bp_location
*b
)
13425 if (a
->address
!= b
->address
)
13428 if (a
->shlib_disabled
!= b
->shlib_disabled
)
13431 if (a
->enabled
!= b
->enabled
)
13438 if ((a
== NULL
) != (b
== NULL
))
13444 /* Split all locations of B that are bound to PSPACE out of B's
13445 location list to a separate list and return that list's head. If
13446 PSPACE is NULL, hoist out all locations of B. */
13448 static struct bp_location
*
13449 hoist_existing_locations (struct breakpoint
*b
, struct program_space
*pspace
)
13451 struct bp_location head
;
13452 struct bp_location
*i
= b
->loc
;
13453 struct bp_location
**i_link
= &b
->loc
;
13454 struct bp_location
*hoisted
= &head
;
13456 if (pspace
== NULL
)
13467 if (i
->pspace
== pspace
)
13482 /* Create new breakpoint locations for B (a hardware or software
13483 breakpoint) based on SALS and SALS_END. If SALS_END.NELTS is not
13484 zero, then B is a ranged breakpoint. Only recreates locations for
13485 FILTER_PSPACE. Locations of other program spaces are left
13489 update_breakpoint_locations (struct breakpoint
*b
,
13490 struct program_space
*filter_pspace
,
13491 gdb::array_view
<const symtab_and_line
> sals
,
13492 gdb::array_view
<const symtab_and_line
> sals_end
)
13494 struct bp_location
*existing_locations
;
13496 if (!sals_end
.empty () && (sals
.size () != 1 || sals_end
.size () != 1))
13498 /* Ranged breakpoints have only one start location and one end
13500 b
->enable_state
= bp_disabled
;
13501 printf_unfiltered (_("Could not reset ranged breakpoint %d: "
13502 "multiple locations found\n"),
13507 /* If there's no new locations, and all existing locations are
13508 pending, don't do anything. This optimizes the common case where
13509 all locations are in the same shared library, that was unloaded.
13510 We'd like to retain the location, so that when the library is
13511 loaded again, we don't loose the enabled/disabled status of the
13512 individual locations. */
13513 if (all_locations_are_pending (b
, filter_pspace
) && sals
.empty ())
13516 existing_locations
= hoist_existing_locations (b
, filter_pspace
);
13518 for (const auto &sal
: sals
)
13520 struct bp_location
*new_loc
;
13522 switch_to_program_space_and_thread (sal
.pspace
);
13524 new_loc
= add_location_to_breakpoint (b
, &sal
);
13526 /* Reparse conditions, they might contain references to the
13528 if (b
->cond_string
!= NULL
)
13532 s
= b
->cond_string
;
13535 new_loc
->cond
= parse_exp_1 (&s
, sal
.pc
,
13536 block_for_pc (sal
.pc
),
13539 CATCH (e
, RETURN_MASK_ERROR
)
13541 warning (_("failed to reevaluate condition "
13542 "for breakpoint %d: %s"),
13543 b
->number
, e
.message
);
13544 new_loc
->enabled
= 0;
13549 if (!sals_end
.empty ())
13551 CORE_ADDR end
= find_breakpoint_range_end (sals_end
[0]);
13553 new_loc
->length
= end
- sals
[0].pc
+ 1;
13557 /* If possible, carry over 'disable' status from existing
13560 struct bp_location
*e
= existing_locations
;
13561 /* If there are multiple breakpoints with the same function name,
13562 e.g. for inline functions, comparing function names won't work.
13563 Instead compare pc addresses; this is just a heuristic as things
13564 may have moved, but in practice it gives the correct answer
13565 often enough until a better solution is found. */
13566 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
13568 for (; e
; e
= e
->next
)
13570 if (!e
->enabled
&& e
->function_name
)
13572 struct bp_location
*l
= b
->loc
;
13573 if (have_ambiguous_names
)
13575 for (; l
; l
= l
->next
)
13576 if (breakpoint_locations_match (e
, l
))
13584 for (; l
; l
= l
->next
)
13585 if (l
->function_name
13586 && strcmp (e
->function_name
, l
->function_name
) == 0)
13596 if (!locations_are_equal (existing_locations
, b
->loc
))
13597 gdb::observers::breakpoint_modified
.notify (b
);
13600 /* Find the SaL locations corresponding to the given LOCATION.
13601 On return, FOUND will be 1 if any SaL was found, zero otherwise. */
13603 static std::vector
<symtab_and_line
>
13604 location_to_sals (struct breakpoint
*b
, struct event_location
*location
,
13605 struct program_space
*search_pspace
, int *found
)
13607 struct gdb_exception exception
= exception_none
;
13609 gdb_assert (b
->ops
!= NULL
);
13611 std::vector
<symtab_and_line
> sals
;
13615 sals
= b
->ops
->decode_location (b
, location
, search_pspace
);
13617 CATCH (e
, RETURN_MASK_ERROR
)
13619 int not_found_and_ok
= 0;
13623 /* For pending breakpoints, it's expected that parsing will
13624 fail until the right shared library is loaded. User has
13625 already told to create pending breakpoints and don't need
13626 extra messages. If breakpoint is in bp_shlib_disabled
13627 state, then user already saw the message about that
13628 breakpoint being disabled, and don't want to see more
13630 if (e
.error
== NOT_FOUND_ERROR
13631 && (b
->condition_not_parsed
13633 && search_pspace
!= NULL
13634 && b
->loc
->pspace
!= search_pspace
)
13635 || (b
->loc
&& b
->loc
->shlib_disabled
)
13636 || (b
->loc
&& b
->loc
->pspace
->executing_startup
)
13637 || b
->enable_state
== bp_disabled
))
13638 not_found_and_ok
= 1;
13640 if (!not_found_and_ok
)
13642 /* We surely don't want to warn about the same breakpoint
13643 10 times. One solution, implemented here, is disable
13644 the breakpoint on error. Another solution would be to
13645 have separate 'warning emitted' flag. Since this
13646 happens only when a binary has changed, I don't know
13647 which approach is better. */
13648 b
->enable_state
= bp_disabled
;
13649 throw_exception (e
);
13654 if (exception
.reason
== 0 || exception
.error
!= NOT_FOUND_ERROR
)
13656 for (auto &sal
: sals
)
13657 resolve_sal_pc (&sal
);
13658 if (b
->condition_not_parsed
&& b
->extra_string
!= NULL
)
13660 char *cond_string
, *extra_string
;
13663 find_condition_and_thread (b
->extra_string
, sals
[0].pc
,
13664 &cond_string
, &thread
, &task
,
13666 gdb_assert (b
->cond_string
== NULL
);
13668 b
->cond_string
= cond_string
;
13669 b
->thread
= thread
;
13673 xfree (b
->extra_string
);
13674 b
->extra_string
= extra_string
;
13676 b
->condition_not_parsed
= 0;
13679 if (b
->type
== bp_static_tracepoint
&& !strace_marker_p (b
))
13680 sals
[0] = update_static_tracepoint (b
, sals
[0]);
13690 /* The default re_set method, for typical hardware or software
13691 breakpoints. Reevaluate the breakpoint and recreate its
13695 breakpoint_re_set_default (struct breakpoint
*b
)
13697 struct program_space
*filter_pspace
= current_program_space
;
13698 std::vector
<symtab_and_line
> expanded
, expanded_end
;
13701 std::vector
<symtab_and_line
> sals
= location_to_sals (b
, b
->location
.get (),
13702 filter_pspace
, &found
);
13704 expanded
= std::move (sals
);
13706 if (b
->location_range_end
!= NULL
)
13708 std::vector
<symtab_and_line
> sals_end
13709 = location_to_sals (b
, b
->location_range_end
.get (),
13710 filter_pspace
, &found
);
13712 expanded_end
= std::move (sals_end
);
13715 update_breakpoint_locations (b
, filter_pspace
, expanded
, expanded_end
);
13718 /* Default method for creating SALs from an address string. It basically
13719 calls parse_breakpoint_sals. Return 1 for success, zero for failure. */
13722 create_sals_from_location_default (const struct event_location
*location
,
13723 struct linespec_result
*canonical
,
13724 enum bptype type_wanted
)
13726 parse_breakpoint_sals (location
, canonical
);
13729 /* Call create_breakpoints_sal for the given arguments. This is the default
13730 function for the `create_breakpoints_sal' method of
13734 create_breakpoints_sal_default (struct gdbarch
*gdbarch
,
13735 struct linespec_result
*canonical
,
13736 gdb::unique_xmalloc_ptr
<char> cond_string
,
13737 gdb::unique_xmalloc_ptr
<char> extra_string
,
13738 enum bptype type_wanted
,
13739 enum bpdisp disposition
,
13741 int task
, int ignore_count
,
13742 const struct breakpoint_ops
*ops
,
13743 int from_tty
, int enabled
,
13744 int internal
, unsigned flags
)
13746 create_breakpoints_sal (gdbarch
, canonical
,
13747 std::move (cond_string
),
13748 std::move (extra_string
),
13749 type_wanted
, disposition
,
13750 thread
, task
, ignore_count
, ops
, from_tty
,
13751 enabled
, internal
, flags
);
13754 /* Decode the line represented by S by calling decode_line_full. This is the
13755 default function for the `decode_location' method of breakpoint_ops. */
13757 static std::vector
<symtab_and_line
>
13758 decode_location_default (struct breakpoint
*b
,
13759 const struct event_location
*location
,
13760 struct program_space
*search_pspace
)
13762 struct linespec_result canonical
;
13764 decode_line_full (location
, DECODE_LINE_FUNFIRSTLINE
, search_pspace
,
13765 (struct symtab
*) NULL
, 0,
13766 &canonical
, multiple_symbols_all
,
13769 /* We should get 0 or 1 resulting SALs. */
13770 gdb_assert (canonical
.lsals
.size () < 2);
13772 if (!canonical
.lsals
.empty ())
13774 const linespec_sals
&lsal
= canonical
.lsals
[0];
13775 return std::move (lsal
.sals
);
13780 /* Reset a breakpoint. */
13783 breakpoint_re_set_one (breakpoint
*b
)
13785 input_radix
= b
->input_radix
;
13786 set_language (b
->language
);
13788 b
->ops
->re_set (b
);
13791 /* Re-set breakpoint locations for the current program space.
13792 Locations bound to other program spaces are left untouched. */
13795 breakpoint_re_set (void)
13797 struct breakpoint
*b
, *b_tmp
;
13800 scoped_restore_current_language save_language
;
13801 scoped_restore save_input_radix
= make_scoped_restore (&input_radix
);
13802 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
13804 /* breakpoint_re_set_one sets the current_language to the language
13805 of the breakpoint it is resetting (see prepare_re_set_context)
13806 before re-evaluating the breakpoint's location. This change can
13807 unfortunately get undone by accident if the language_mode is set
13808 to auto, and we either switch frames, or more likely in this context,
13809 we select the current frame.
13811 We prevent this by temporarily turning the language_mode to
13812 language_mode_manual. We restore it once all breakpoints
13813 have been reset. */
13814 scoped_restore save_language_mode
= make_scoped_restore (&language_mode
);
13815 language_mode
= language_mode_manual
;
13817 /* Note: we must not try to insert locations until after all
13818 breakpoints have been re-set. Otherwise, e.g., when re-setting
13819 breakpoint 1, we'd insert the locations of breakpoint 2, which
13820 hadn't been re-set yet, and thus may have stale locations. */
13822 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
13826 breakpoint_re_set_one (b
);
13828 CATCH (ex
, RETURN_MASK_ALL
)
13830 exception_fprintf (gdb_stderr
, ex
,
13831 "Error in re-setting breakpoint %d: ",
13837 jit_breakpoint_re_set ();
13840 create_overlay_event_breakpoint ();
13841 create_longjmp_master_breakpoint ();
13842 create_std_terminate_master_breakpoint ();
13843 create_exception_master_breakpoint ();
13845 /* Now we can insert. */
13846 update_global_location_list (UGLL_MAY_INSERT
);
13849 /* Reset the thread number of this breakpoint:
13851 - If the breakpoint is for all threads, leave it as-is.
13852 - Else, reset it to the current thread for inferior_ptid. */
13854 breakpoint_re_set_thread (struct breakpoint
*b
)
13856 if (b
->thread
!= -1)
13858 b
->thread
= inferior_thread ()->global_num
;
13860 /* We're being called after following a fork. The new fork is
13861 selected as current, and unless this was a vfork will have a
13862 different program space from the original thread. Reset that
13864 b
->loc
->pspace
= current_program_space
;
13868 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
13869 If from_tty is nonzero, it prints a message to that effect,
13870 which ends with a period (no newline). */
13873 set_ignore_count (int bptnum
, int count
, int from_tty
)
13875 struct breakpoint
*b
;
13880 ALL_BREAKPOINTS (b
)
13881 if (b
->number
== bptnum
)
13883 if (is_tracepoint (b
))
13885 if (from_tty
&& count
!= 0)
13886 printf_filtered (_("Ignore count ignored for tracepoint %d."),
13891 b
->ignore_count
= count
;
13895 printf_filtered (_("Will stop next time "
13896 "breakpoint %d is reached."),
13898 else if (count
== 1)
13899 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
13902 printf_filtered (_("Will ignore next %d "
13903 "crossings of breakpoint %d."),
13906 gdb::observers::breakpoint_modified
.notify (b
);
13910 error (_("No breakpoint number %d."), bptnum
);
13913 /* Command to set ignore-count of breakpoint N to COUNT. */
13916 ignore_command (const char *args
, int from_tty
)
13918 const char *p
= args
;
13922 error_no_arg (_("a breakpoint number"));
13924 num
= get_number (&p
);
13926 error (_("bad breakpoint number: '%s'"), args
);
13928 error (_("Second argument (specified ignore-count) is missing."));
13930 set_ignore_count (num
,
13931 longest_to_int (value_as_long (parse_and_eval (p
))),
13934 printf_filtered ("\n");
13938 /* Call FUNCTION on each of the breakpoints with numbers in the range
13939 defined by BP_NUM_RANGE (an inclusive range). */
13942 map_breakpoint_number_range (std::pair
<int, int> bp_num_range
,
13943 gdb::function_view
<void (breakpoint
*)> function
)
13945 if (bp_num_range
.first
== 0)
13947 warning (_("bad breakpoint number at or near '%d'"),
13948 bp_num_range
.first
);
13952 struct breakpoint
*b
, *tmp
;
13954 for (int i
= bp_num_range
.first
; i
<= bp_num_range
.second
; i
++)
13956 bool match
= false;
13958 ALL_BREAKPOINTS_SAFE (b
, tmp
)
13959 if (b
->number
== i
)
13966 printf_unfiltered (_("No breakpoint number %d.\n"), i
);
13971 /* Call FUNCTION on each of the breakpoints whose numbers are given in
13975 map_breakpoint_numbers (const char *args
,
13976 gdb::function_view
<void (breakpoint
*)> function
)
13978 if (args
== NULL
|| *args
== '\0')
13979 error_no_arg (_("one or more breakpoint numbers"));
13981 number_or_range_parser
parser (args
);
13983 while (!parser
.finished ())
13985 int num
= parser
.get_number ();
13986 map_breakpoint_number_range (std::make_pair (num
, num
), function
);
13990 /* Return the breakpoint location structure corresponding to the
13991 BP_NUM and LOC_NUM values. */
13993 static struct bp_location
*
13994 find_location_by_number (int bp_num
, int loc_num
)
13996 struct breakpoint
*b
;
13998 ALL_BREAKPOINTS (b
)
13999 if (b
->number
== bp_num
)
14004 if (!b
|| b
->number
!= bp_num
)
14005 error (_("Bad breakpoint number '%d'"), bp_num
);
14008 error (_("Bad breakpoint location number '%d'"), loc_num
);
14011 for (bp_location
*loc
= b
->loc
; loc
!= NULL
; loc
= loc
->next
)
14012 if (++n
== loc_num
)
14015 error (_("Bad breakpoint location number '%d'"), loc_num
);
14018 /* Modes of operation for extract_bp_num. */
14019 enum class extract_bp_kind
14021 /* Extracting a breakpoint number. */
14024 /* Extracting a location number. */
14028 /* Extract a breakpoint or location number (as determined by KIND)
14029 from the string starting at START. TRAILER is a character which
14030 can be found after the number. If you don't want a trailer, use
14031 '\0'. If END_OUT is not NULL, it is set to point after the parsed
14032 string. This always returns a positive integer. */
14035 extract_bp_num (extract_bp_kind kind
, const char *start
,
14036 int trailer
, const char **end_out
= NULL
)
14038 const char *end
= start
;
14039 int num
= get_number_trailer (&end
, trailer
);
14041 error (kind
== extract_bp_kind::bp
14042 ? _("Negative breakpoint number '%.*s'")
14043 : _("Negative breakpoint location number '%.*s'"),
14044 int (end
- start
), start
);
14046 error (kind
== extract_bp_kind::bp
14047 ? _("Bad breakpoint number '%.*s'")
14048 : _("Bad breakpoint location number '%.*s'"),
14049 int (end
- start
), start
);
14051 if (end_out
!= NULL
)
14056 /* Extract a breakpoint or location range (as determined by KIND) in
14057 the form NUM1-NUM2 stored at &ARG[arg_offset]. Returns a std::pair
14058 representing the (inclusive) range. The returned pair's elements
14059 are always positive integers. */
14061 static std::pair
<int, int>
14062 extract_bp_or_bp_range (extract_bp_kind kind
,
14063 const std::string
&arg
,
14064 std::string::size_type arg_offset
)
14066 std::pair
<int, int> range
;
14067 const char *bp_loc
= &arg
[arg_offset
];
14068 std::string::size_type dash
= arg
.find ('-', arg_offset
);
14069 if (dash
!= std::string::npos
)
14071 /* bp_loc is a range (x-z). */
14072 if (arg
.length () == dash
+ 1)
14073 error (kind
== extract_bp_kind::bp
14074 ? _("Bad breakpoint number at or near: '%s'")
14075 : _("Bad breakpoint location number at or near: '%s'"),
14079 const char *start_first
= bp_loc
;
14080 const char *start_second
= &arg
[dash
+ 1];
14081 range
.first
= extract_bp_num (kind
, start_first
, '-');
14082 range
.second
= extract_bp_num (kind
, start_second
, '\0', &end
);
14084 if (range
.first
> range
.second
)
14085 error (kind
== extract_bp_kind::bp
14086 ? _("Inverted breakpoint range at '%.*s'")
14087 : _("Inverted breakpoint location range at '%.*s'"),
14088 int (end
- start_first
), start_first
);
14092 /* bp_loc is a single value. */
14093 range
.first
= extract_bp_num (kind
, bp_loc
, '\0');
14094 range
.second
= range
.first
;
14099 /* Extract the breakpoint/location range specified by ARG. Returns
14100 the breakpoint range in BP_NUM_RANGE, and the location range in
14103 ARG may be in any of the following forms:
14105 x where 'x' is a breakpoint number.
14106 x-y where 'x' and 'y' specify a breakpoint numbers range.
14107 x.y where 'x' is a breakpoint number and 'y' a location number.
14108 x.y-z where 'x' is a breakpoint number and 'y' and 'z' specify a
14109 location number range.
14113 extract_bp_number_and_location (const std::string
&arg
,
14114 std::pair
<int, int> &bp_num_range
,
14115 std::pair
<int, int> &bp_loc_range
)
14117 std::string::size_type dot
= arg
.find ('.');
14119 if (dot
!= std::string::npos
)
14121 /* Handle 'x.y' and 'x.y-z' cases. */
14123 if (arg
.length () == dot
+ 1 || dot
== 0)
14124 error (_("Bad breakpoint number at or near: '%s'"), arg
.c_str ());
14127 = extract_bp_num (extract_bp_kind::bp
, arg
.c_str (), '.');
14128 bp_num_range
.second
= bp_num_range
.first
;
14130 bp_loc_range
= extract_bp_or_bp_range (extract_bp_kind::loc
,
14135 /* Handle x and x-y cases. */
14137 bp_num_range
= extract_bp_or_bp_range (extract_bp_kind::bp
, arg
, 0);
14138 bp_loc_range
.first
= 0;
14139 bp_loc_range
.second
= 0;
14143 /* Enable or disable a breakpoint location BP_NUM.LOC_NUM. ENABLE
14144 specifies whether to enable or disable. */
14147 enable_disable_bp_num_loc (int bp_num
, int loc_num
, bool enable
)
14149 struct bp_location
*loc
= find_location_by_number (bp_num
, loc_num
);
14152 if (loc
->enabled
!= enable
)
14154 loc
->enabled
= enable
;
14155 mark_breakpoint_location_modified (loc
);
14157 if (target_supports_enable_disable_tracepoint ()
14158 && current_trace_status ()->running
&& loc
->owner
14159 && is_tracepoint (loc
->owner
))
14160 target_disable_tracepoint (loc
);
14162 update_global_location_list (UGLL_DONT_INSERT
);
14164 gdb::observers::breakpoint_modified
.notify (loc
->owner
);
14167 /* Enable or disable a range of breakpoint locations. BP_NUM is the
14168 number of the breakpoint, and BP_LOC_RANGE specifies the
14169 (inclusive) range of location numbers of that breakpoint to
14170 enable/disable. ENABLE specifies whether to enable or disable the
14174 enable_disable_breakpoint_location_range (int bp_num
,
14175 std::pair
<int, int> &bp_loc_range
,
14178 for (int i
= bp_loc_range
.first
; i
<= bp_loc_range
.second
; i
++)
14179 enable_disable_bp_num_loc (bp_num
, i
, enable
);
14182 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
14183 If from_tty is nonzero, it prints a message to that effect,
14184 which ends with a period (no newline). */
14187 disable_breakpoint (struct breakpoint
*bpt
)
14189 /* Never disable a watchpoint scope breakpoint; we want to
14190 hit them when we leave scope so we can delete both the
14191 watchpoint and its scope breakpoint at that time. */
14192 if (bpt
->type
== bp_watchpoint_scope
)
14195 bpt
->enable_state
= bp_disabled
;
14197 /* Mark breakpoint locations modified. */
14198 mark_breakpoint_modified (bpt
);
14200 if (target_supports_enable_disable_tracepoint ()
14201 && current_trace_status ()->running
&& is_tracepoint (bpt
))
14203 struct bp_location
*location
;
14205 for (location
= bpt
->loc
; location
; location
= location
->next
)
14206 target_disable_tracepoint (location
);
14209 update_global_location_list (UGLL_DONT_INSERT
);
14211 gdb::observers::breakpoint_modified
.notify (bpt
);
14214 /* Enable or disable the breakpoint(s) or breakpoint location(s)
14215 specified in ARGS. ARGS may be in any of the formats handled by
14216 extract_bp_number_and_location. ENABLE specifies whether to enable
14217 or disable the breakpoints/locations. */
14220 enable_disable_command (const char *args
, int from_tty
, bool enable
)
14224 struct breakpoint
*bpt
;
14226 ALL_BREAKPOINTS (bpt
)
14227 if (user_breakpoint_p (bpt
))
14230 enable_breakpoint (bpt
);
14232 disable_breakpoint (bpt
);
14237 std::string num
= extract_arg (&args
);
14239 while (!num
.empty ())
14241 std::pair
<int, int> bp_num_range
, bp_loc_range
;
14243 extract_bp_number_and_location (num
, bp_num_range
, bp_loc_range
);
14245 if (bp_loc_range
.first
== bp_loc_range
.second
14246 && bp_loc_range
.first
== 0)
14248 /* Handle breakpoint ids with formats 'x' or 'x-z'. */
14249 map_breakpoint_number_range (bp_num_range
,
14251 ? enable_breakpoint
14252 : disable_breakpoint
);
14256 /* Handle breakpoint ids with formats 'x.y' or
14258 enable_disable_breakpoint_location_range
14259 (bp_num_range
.first
, bp_loc_range
, enable
);
14261 num
= extract_arg (&args
);
14266 /* The disable command disables the specified breakpoints/locations
14267 (or all defined breakpoints) so they're no longer effective in
14268 stopping the inferior. ARGS may be in any of the forms defined in
14269 extract_bp_number_and_location. */
14272 disable_command (const char *args
, int from_tty
)
14274 enable_disable_command (args
, from_tty
, false);
14278 enable_breakpoint_disp (struct breakpoint
*bpt
, enum bpdisp disposition
,
14281 int target_resources_ok
;
14283 if (bpt
->type
== bp_hardware_breakpoint
)
14286 i
= hw_breakpoint_used_count ();
14287 target_resources_ok
=
14288 target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
14290 if (target_resources_ok
== 0)
14291 error (_("No hardware breakpoint support in the target."));
14292 else if (target_resources_ok
< 0)
14293 error (_("Hardware breakpoints used exceeds limit."));
14296 if (is_watchpoint (bpt
))
14298 /* Initialize it just to avoid a GCC false warning. */
14299 enum enable_state orig_enable_state
= bp_disabled
;
14303 struct watchpoint
*w
= (struct watchpoint
*) bpt
;
14305 orig_enable_state
= bpt
->enable_state
;
14306 bpt
->enable_state
= bp_enabled
;
14307 update_watchpoint (w
, 1 /* reparse */);
14309 CATCH (e
, RETURN_MASK_ALL
)
14311 bpt
->enable_state
= orig_enable_state
;
14312 exception_fprintf (gdb_stderr
, e
, _("Cannot enable watchpoint %d: "),
14319 bpt
->enable_state
= bp_enabled
;
14321 /* Mark breakpoint locations modified. */
14322 mark_breakpoint_modified (bpt
);
14324 if (target_supports_enable_disable_tracepoint ()
14325 && current_trace_status ()->running
&& is_tracepoint (bpt
))
14327 struct bp_location
*location
;
14329 for (location
= bpt
->loc
; location
; location
= location
->next
)
14330 target_enable_tracepoint (location
);
14333 bpt
->disposition
= disposition
;
14334 bpt
->enable_count
= count
;
14335 update_global_location_list (UGLL_MAY_INSERT
);
14337 gdb::observers::breakpoint_modified
.notify (bpt
);
14342 enable_breakpoint (struct breakpoint
*bpt
)
14344 enable_breakpoint_disp (bpt
, bpt
->disposition
, 0);
14347 /* The enable command enables the specified breakpoints/locations (or
14348 all defined breakpoints) so they once again become (or continue to
14349 be) effective in stopping the inferior. ARGS may be in any of the
14350 forms defined in extract_bp_number_and_location. */
14353 enable_command (const char *args
, int from_tty
)
14355 enable_disable_command (args
, from_tty
, true);
14359 enable_once_command (const char *args
, int from_tty
)
14361 map_breakpoint_numbers
14362 (args
, [&] (breakpoint
*b
)
14364 iterate_over_related_breakpoints
14365 (b
, [&] (breakpoint
*bpt
)
14367 enable_breakpoint_disp (bpt
, disp_disable
, 1);
14373 enable_count_command (const char *args
, int from_tty
)
14378 error_no_arg (_("hit count"));
14380 count
= get_number (&args
);
14382 map_breakpoint_numbers
14383 (args
, [&] (breakpoint
*b
)
14385 iterate_over_related_breakpoints
14386 (b
, [&] (breakpoint
*bpt
)
14388 enable_breakpoint_disp (bpt
, disp_disable
, count
);
14394 enable_delete_command (const char *args
, int from_tty
)
14396 map_breakpoint_numbers
14397 (args
, [&] (breakpoint
*b
)
14399 iterate_over_related_breakpoints
14400 (b
, [&] (breakpoint
*bpt
)
14402 enable_breakpoint_disp (bpt
, disp_del
, 1);
14408 set_breakpoint_cmd (const char *args
, int from_tty
)
14413 show_breakpoint_cmd (const char *args
, int from_tty
)
14417 /* Invalidate last known value of any hardware watchpoint if
14418 the memory which that value represents has been written to by
14422 invalidate_bp_value_on_memory_change (struct inferior
*inferior
,
14423 CORE_ADDR addr
, ssize_t len
,
14424 const bfd_byte
*data
)
14426 struct breakpoint
*bp
;
14428 ALL_BREAKPOINTS (bp
)
14429 if (bp
->enable_state
== bp_enabled
14430 && bp
->type
== bp_hardware_watchpoint
)
14432 struct watchpoint
*wp
= (struct watchpoint
*) bp
;
14434 if (wp
->val_valid
&& wp
->val
!= nullptr)
14436 struct bp_location
*loc
;
14438 for (loc
= bp
->loc
; loc
!= NULL
; loc
= loc
->next
)
14439 if (loc
->loc_type
== bp_loc_hardware_watchpoint
14440 && loc
->address
+ loc
->length
> addr
14441 && addr
+ len
> loc
->address
)
14450 /* Create and insert a breakpoint for software single step. */
14453 insert_single_step_breakpoint (struct gdbarch
*gdbarch
,
14454 const address_space
*aspace
,
14457 struct thread_info
*tp
= inferior_thread ();
14458 struct symtab_and_line sal
;
14459 CORE_ADDR pc
= next_pc
;
14461 if (tp
->control
.single_step_breakpoints
== NULL
)
14463 tp
->control
.single_step_breakpoints
14464 = new_single_step_breakpoint (tp
->global_num
, gdbarch
);
14467 sal
= find_pc_line (pc
, 0);
14469 sal
.section
= find_pc_overlay (pc
);
14470 sal
.explicit_pc
= 1;
14471 add_location_to_breakpoint (tp
->control
.single_step_breakpoints
, &sal
);
14473 update_global_location_list (UGLL_INSERT
);
14476 /* Insert single step breakpoints according to the current state. */
14479 insert_single_step_breakpoints (struct gdbarch
*gdbarch
)
14481 struct regcache
*regcache
= get_current_regcache ();
14482 std::vector
<CORE_ADDR
> next_pcs
;
14484 next_pcs
= gdbarch_software_single_step (gdbarch
, regcache
);
14486 if (!next_pcs
.empty ())
14488 struct frame_info
*frame
= get_current_frame ();
14489 const address_space
*aspace
= get_frame_address_space (frame
);
14491 for (CORE_ADDR pc
: next_pcs
)
14492 insert_single_step_breakpoint (gdbarch
, aspace
, pc
);
14500 /* See breakpoint.h. */
14503 breakpoint_has_location_inserted_here (struct breakpoint
*bp
,
14504 const address_space
*aspace
,
14507 struct bp_location
*loc
;
14509 for (loc
= bp
->loc
; loc
!= NULL
; loc
= loc
->next
)
14511 && breakpoint_location_address_match (loc
, aspace
, pc
))
14517 /* Check whether a software single-step breakpoint is inserted at
14521 single_step_breakpoint_inserted_here_p (const address_space
*aspace
,
14524 struct breakpoint
*bpt
;
14526 ALL_BREAKPOINTS (bpt
)
14528 if (bpt
->type
== bp_single_step
14529 && breakpoint_has_location_inserted_here (bpt
, aspace
, pc
))
14535 /* Tracepoint-specific operations. */
14537 /* Set tracepoint count to NUM. */
14539 set_tracepoint_count (int num
)
14541 tracepoint_count
= num
;
14542 set_internalvar_integer (lookup_internalvar ("tpnum"), num
);
14546 trace_command (const char *arg
, int from_tty
)
14548 struct breakpoint_ops
*ops
;
14550 event_location_up location
= string_to_event_location (&arg
,
14552 if (location
!= NULL
14553 && event_location_type (location
.get ()) == PROBE_LOCATION
)
14554 ops
= &tracepoint_probe_breakpoint_ops
;
14556 ops
= &tracepoint_breakpoint_ops
;
14558 create_breakpoint (get_current_arch (),
14560 NULL
, 0, arg
, 1 /* parse arg */,
14562 bp_tracepoint
/* type_wanted */,
14563 0 /* Ignore count */,
14564 pending_break_support
,
14568 0 /* internal */, 0);
14572 ftrace_command (const char *arg
, int from_tty
)
14574 event_location_up location
= string_to_event_location (&arg
,
14576 create_breakpoint (get_current_arch (),
14578 NULL
, 0, arg
, 1 /* parse arg */,
14580 bp_fast_tracepoint
/* type_wanted */,
14581 0 /* Ignore count */,
14582 pending_break_support
,
14583 &tracepoint_breakpoint_ops
,
14586 0 /* internal */, 0);
14589 /* strace command implementation. Creates a static tracepoint. */
14592 strace_command (const char *arg
, int from_tty
)
14594 struct breakpoint_ops
*ops
;
14595 event_location_up location
;
14597 /* Decide if we are dealing with a static tracepoint marker (`-m'),
14598 or with a normal static tracepoint. */
14599 if (arg
&& startswith (arg
, "-m") && isspace (arg
[2]))
14601 ops
= &strace_marker_breakpoint_ops
;
14602 location
= new_linespec_location (&arg
, symbol_name_match_type::FULL
);
14606 ops
= &tracepoint_breakpoint_ops
;
14607 location
= string_to_event_location (&arg
, current_language
);
14610 create_breakpoint (get_current_arch (),
14612 NULL
, 0, arg
, 1 /* parse arg */,
14614 bp_static_tracepoint
/* type_wanted */,
14615 0 /* Ignore count */,
14616 pending_break_support
,
14620 0 /* internal */, 0);
14623 /* Set up a fake reader function that gets command lines from a linked
14624 list that was acquired during tracepoint uploading. */
14626 static struct uploaded_tp
*this_utp
;
14627 static int next_cmd
;
14630 read_uploaded_action (void)
14632 char *rslt
= nullptr;
14634 if (next_cmd
< this_utp
->cmd_strings
.size ())
14636 rslt
= this_utp
->cmd_strings
[next_cmd
].get ();
14643 /* Given information about a tracepoint as recorded on a target (which
14644 can be either a live system or a trace file), attempt to create an
14645 equivalent GDB tracepoint. This is not a reliable process, since
14646 the target does not necessarily have all the information used when
14647 the tracepoint was originally defined. */
14649 struct tracepoint
*
14650 create_tracepoint_from_upload (struct uploaded_tp
*utp
)
14652 const char *addr_str
;
14653 char small_buf
[100];
14654 struct tracepoint
*tp
;
14656 if (utp
->at_string
)
14657 addr_str
= utp
->at_string
.get ();
14660 /* In the absence of a source location, fall back to raw
14661 address. Since there is no way to confirm that the address
14662 means the same thing as when the trace was started, warn the
14664 warning (_("Uploaded tracepoint %d has no "
14665 "source location, using raw address"),
14667 xsnprintf (small_buf
, sizeof (small_buf
), "*%s", hex_string (utp
->addr
));
14668 addr_str
= small_buf
;
14671 /* There's not much we can do with a sequence of bytecodes. */
14672 if (utp
->cond
&& !utp
->cond_string
)
14673 warning (_("Uploaded tracepoint %d condition "
14674 "has no source form, ignoring it"),
14677 event_location_up location
= string_to_event_location (&addr_str
,
14679 if (!create_breakpoint (get_current_arch (),
14681 utp
->cond_string
.get (), -1, addr_str
,
14682 0 /* parse cond/thread */,
14684 utp
->type
/* type_wanted */,
14685 0 /* Ignore count */,
14686 pending_break_support
,
14687 &tracepoint_breakpoint_ops
,
14689 utp
->enabled
/* enabled */,
14691 CREATE_BREAKPOINT_FLAGS_INSERTED
))
14694 /* Get the tracepoint we just created. */
14695 tp
= get_tracepoint (tracepoint_count
);
14696 gdb_assert (tp
!= NULL
);
14700 xsnprintf (small_buf
, sizeof (small_buf
), "%d %d", utp
->pass
,
14703 trace_pass_command (small_buf
, 0);
14706 /* If we have uploaded versions of the original commands, set up a
14707 special-purpose "reader" function and call the usual command line
14708 reader, then pass the result to the breakpoint command-setting
14710 if (!utp
->cmd_strings
.empty ())
14712 counted_command_line cmd_list
;
14717 cmd_list
= read_command_lines_1 (read_uploaded_action
, 1, NULL
);
14719 breakpoint_set_commands (tp
, std::move (cmd_list
));
14721 else if (!utp
->actions
.empty ()
14722 || !utp
->step_actions
.empty ())
14723 warning (_("Uploaded tracepoint %d actions "
14724 "have no source form, ignoring them"),
14727 /* Copy any status information that might be available. */
14728 tp
->hit_count
= utp
->hit_count
;
14729 tp
->traceframe_usage
= utp
->traceframe_usage
;
14734 /* Print information on tracepoint number TPNUM_EXP, or all if
14738 info_tracepoints_command (const char *args
, int from_tty
)
14740 struct ui_out
*uiout
= current_uiout
;
14743 num_printed
= breakpoint_1 (args
, 0, is_tracepoint
);
14745 if (num_printed
== 0)
14747 if (args
== NULL
|| *args
== '\0')
14748 uiout
->message ("No tracepoints.\n");
14750 uiout
->message ("No tracepoint matching '%s'.\n", args
);
14753 default_collect_info ();
14756 /* The 'enable trace' command enables tracepoints.
14757 Not supported by all targets. */
14759 enable_trace_command (const char *args
, int from_tty
)
14761 enable_command (args
, from_tty
);
14764 /* The 'disable trace' command disables tracepoints.
14765 Not supported by all targets. */
14767 disable_trace_command (const char *args
, int from_tty
)
14769 disable_command (args
, from_tty
);
14772 /* Remove a tracepoint (or all if no argument). */
14774 delete_trace_command (const char *arg
, int from_tty
)
14776 struct breakpoint
*b
, *b_tmp
;
14782 int breaks_to_delete
= 0;
14784 /* Delete all breakpoints if no argument.
14785 Do not delete internal or call-dummy breakpoints, these
14786 have to be deleted with an explicit breakpoint number
14788 ALL_TRACEPOINTS (b
)
14789 if (is_tracepoint (b
) && user_breakpoint_p (b
))
14791 breaks_to_delete
= 1;
14795 /* Ask user only if there are some breakpoints to delete. */
14797 || (breaks_to_delete
&& query (_("Delete all tracepoints? "))))
14799 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
14800 if (is_tracepoint (b
) && user_breakpoint_p (b
))
14801 delete_breakpoint (b
);
14805 map_breakpoint_numbers
14806 (arg
, [&] (breakpoint
*br
)
14808 iterate_over_related_breakpoints (br
, delete_breakpoint
);
14812 /* Helper function for trace_pass_command. */
14815 trace_pass_set_count (struct tracepoint
*tp
, int count
, int from_tty
)
14817 tp
->pass_count
= count
;
14818 gdb::observers::breakpoint_modified
.notify (tp
);
14820 printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
14821 tp
->number
, count
);
14824 /* Set passcount for tracepoint.
14826 First command argument is passcount, second is tracepoint number.
14827 If tracepoint number omitted, apply to most recently defined.
14828 Also accepts special argument "all". */
14831 trace_pass_command (const char *args
, int from_tty
)
14833 struct tracepoint
*t1
;
14836 if (args
== 0 || *args
== 0)
14837 error (_("passcount command requires an "
14838 "argument (count + optional TP num)"));
14840 count
= strtoulst (args
, &args
, 10); /* Count comes first, then TP num. */
14842 args
= skip_spaces (args
);
14843 if (*args
&& strncasecmp (args
, "all", 3) == 0)
14845 struct breakpoint
*b
;
14847 args
+= 3; /* Skip special argument "all". */
14849 error (_("Junk at end of arguments."));
14851 ALL_TRACEPOINTS (b
)
14853 t1
= (struct tracepoint
*) b
;
14854 trace_pass_set_count (t1
, count
, from_tty
);
14857 else if (*args
== '\0')
14859 t1
= get_tracepoint_by_number (&args
, NULL
);
14861 trace_pass_set_count (t1
, count
, from_tty
);
14865 number_or_range_parser
parser (args
);
14866 while (!parser
.finished ())
14868 t1
= get_tracepoint_by_number (&args
, &parser
);
14870 trace_pass_set_count (t1
, count
, from_tty
);
14875 struct tracepoint
*
14876 get_tracepoint (int num
)
14878 struct breakpoint
*t
;
14880 ALL_TRACEPOINTS (t
)
14881 if (t
->number
== num
)
14882 return (struct tracepoint
*) t
;
14887 /* Find the tracepoint with the given target-side number (which may be
14888 different from the tracepoint number after disconnecting and
14891 struct tracepoint
*
14892 get_tracepoint_by_number_on_target (int num
)
14894 struct breakpoint
*b
;
14896 ALL_TRACEPOINTS (b
)
14898 struct tracepoint
*t
= (struct tracepoint
*) b
;
14900 if (t
->number_on_target
== num
)
14907 /* Utility: parse a tracepoint number and look it up in the list.
14908 If STATE is not NULL, use, get_number_or_range_state and ignore ARG.
14909 If the argument is missing, the most recent tracepoint
14910 (tracepoint_count) is returned. */
14912 struct tracepoint
*
14913 get_tracepoint_by_number (const char **arg
,
14914 number_or_range_parser
*parser
)
14916 struct breakpoint
*t
;
14918 const char *instring
= arg
== NULL
? NULL
: *arg
;
14920 if (parser
!= NULL
)
14922 gdb_assert (!parser
->finished ());
14923 tpnum
= parser
->get_number ();
14925 else if (arg
== NULL
|| *arg
== NULL
|| ! **arg
)
14926 tpnum
= tracepoint_count
;
14928 tpnum
= get_number (arg
);
14932 if (instring
&& *instring
)
14933 printf_filtered (_("bad tracepoint number at or near '%s'\n"),
14936 printf_filtered (_("No previous tracepoint\n"));
14940 ALL_TRACEPOINTS (t
)
14941 if (t
->number
== tpnum
)
14943 return (struct tracepoint
*) t
;
14946 printf_unfiltered ("No tracepoint number %d.\n", tpnum
);
14951 print_recreate_thread (struct breakpoint
*b
, struct ui_file
*fp
)
14953 if (b
->thread
!= -1)
14954 fprintf_unfiltered (fp
, " thread %d", b
->thread
);
14957 fprintf_unfiltered (fp
, " task %d", b
->task
);
14959 fprintf_unfiltered (fp
, "\n");
14962 /* Save information on user settable breakpoints (watchpoints, etc) to
14963 a new script file named FILENAME. If FILTER is non-NULL, call it
14964 on each breakpoint and only include the ones for which it returns
14968 save_breakpoints (const char *filename
, int from_tty
,
14969 int (*filter
) (const struct breakpoint
*))
14971 struct breakpoint
*tp
;
14973 int extra_trace_bits
= 0;
14975 if (filename
== 0 || *filename
== 0)
14976 error (_("Argument required (file name in which to save)"));
14978 /* See if we have anything to save. */
14979 ALL_BREAKPOINTS (tp
)
14981 /* Skip internal and momentary breakpoints. */
14982 if (!user_breakpoint_p (tp
))
14985 /* If we have a filter, only save the breakpoints it accepts. */
14986 if (filter
&& !filter (tp
))
14991 if (is_tracepoint (tp
))
14993 extra_trace_bits
= 1;
14995 /* We can stop searching. */
15002 warning (_("Nothing to save."));
15006 gdb::unique_xmalloc_ptr
<char> expanded_filename (tilde_expand (filename
));
15010 if (!fp
.open (expanded_filename
.get (), "w"))
15011 error (_("Unable to open file '%s' for saving (%s)"),
15012 expanded_filename
.get (), safe_strerror (errno
));
15014 if (extra_trace_bits
)
15015 save_trace_state_variables (&fp
);
15017 ALL_BREAKPOINTS (tp
)
15019 /* Skip internal and momentary breakpoints. */
15020 if (!user_breakpoint_p (tp
))
15023 /* If we have a filter, only save the breakpoints it accepts. */
15024 if (filter
&& !filter (tp
))
15027 tp
->ops
->print_recreate (tp
, &fp
);
15029 /* Note, we can't rely on tp->number for anything, as we can't
15030 assume the recreated breakpoint numbers will match. Use $bpnum
15033 if (tp
->cond_string
)
15034 fp
.printf (" condition $bpnum %s\n", tp
->cond_string
);
15036 if (tp
->ignore_count
)
15037 fp
.printf (" ignore $bpnum %d\n", tp
->ignore_count
);
15039 if (tp
->type
!= bp_dprintf
&& tp
->commands
)
15041 fp
.puts (" commands\n");
15043 current_uiout
->redirect (&fp
);
15046 print_command_lines (current_uiout
, tp
->commands
.get (), 2);
15048 CATCH (ex
, RETURN_MASK_ALL
)
15050 current_uiout
->redirect (NULL
);
15051 throw_exception (ex
);
15055 current_uiout
->redirect (NULL
);
15056 fp
.puts (" end\n");
15059 if (tp
->enable_state
== bp_disabled
)
15060 fp
.puts ("disable $bpnum\n");
15062 /* If this is a multi-location breakpoint, check if the locations
15063 should be individually disabled. Watchpoint locations are
15064 special, and not user visible. */
15065 if (!is_watchpoint (tp
) && tp
->loc
&& tp
->loc
->next
)
15067 struct bp_location
*loc
;
15070 for (loc
= tp
->loc
; loc
!= NULL
; loc
= loc
->next
, n
++)
15072 fp
.printf ("disable $bpnum.%d\n", n
);
15076 if (extra_trace_bits
&& *default_collect
)
15077 fp
.printf ("set default-collect %s\n", default_collect
);
15080 printf_filtered (_("Saved to file '%s'.\n"), expanded_filename
.get ());
15083 /* The `save breakpoints' command. */
15086 save_breakpoints_command (const char *args
, int from_tty
)
15088 save_breakpoints (args
, from_tty
, NULL
);
15091 /* The `save tracepoints' command. */
15094 save_tracepoints_command (const char *args
, int from_tty
)
15096 save_breakpoints (args
, from_tty
, is_tracepoint
);
15099 /* Create a vector of all tracepoints. */
15101 std::vector
<breakpoint
*>
15102 all_tracepoints (void)
15104 std::vector
<breakpoint
*> tp_vec
;
15105 struct breakpoint
*tp
;
15107 ALL_TRACEPOINTS (tp
)
15109 tp_vec
.push_back (tp
);
15116 /* This help string is used to consolidate all the help string for specifying
15117 locations used by several commands. */
15119 #define LOCATION_HELP_STRING \
15120 "Linespecs are colon-separated lists of location parameters, such as\n\
15121 source filename, function name, label name, and line number.\n\
15122 Example: To specify the start of a label named \"the_top\" in the\n\
15123 function \"fact\" in the file \"factorial.c\", use\n\
15124 \"factorial.c:fact:the_top\".\n\
15126 Address locations begin with \"*\" and specify an exact address in the\n\
15127 program. Example: To specify the fourth byte past the start function\n\
15128 \"main\", use \"*main + 4\".\n\
15130 Explicit locations are similar to linespecs but use an option/argument\n\
15131 syntax to specify location parameters.\n\
15132 Example: To specify the start of the label named \"the_top\" in the\n\
15133 function \"fact\" in the file \"factorial.c\", use \"-source factorial.c\n\
15134 -function fact -label the_top\".\n\
15136 By default, a specified function is matched against the program's\n\
15137 functions in all scopes. For C++, this means in all namespaces and\n\
15138 classes. For Ada, this means in all packages. E.g., in C++,\n\
15139 \"func()\" matches \"A::func()\", \"A::B::func()\", etc. The\n\
15140 \"-qualified\" flag overrides this behavior, making GDB interpret the\n\
15141 specified name as a complete fully-qualified name instead.\n"
15143 /* This help string is used for the break, hbreak, tbreak and thbreak
15144 commands. It is defined as a macro to prevent duplication.
15145 COMMAND should be a string constant containing the name of the
15148 #define BREAK_ARGS_HELP(command) \
15149 command" [PROBE_MODIFIER] [LOCATION] [thread THREADNUM] [if CONDITION]\n\
15150 PROBE_MODIFIER shall be present if the command is to be placed in a\n\
15151 probe point. Accepted values are `-probe' (for a generic, automatically\n\
15152 guessed probe type), `-probe-stap' (for a SystemTap probe) or \n\
15153 `-probe-dtrace' (for a DTrace probe).\n\
15154 LOCATION may be a linespec, address, or explicit location as described\n\
15157 With no LOCATION, uses current execution address of the selected\n\
15158 stack frame. This is useful for breaking on return to a stack frame.\n\
15160 THREADNUM is the number from \"info threads\".\n\
15161 CONDITION is a boolean expression.\n\
15162 \n" LOCATION_HELP_STRING "\n\
15163 Multiple breakpoints at one place are permitted, and useful if their\n\
15164 conditions are different.\n\
15166 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
15168 /* List of subcommands for "catch". */
15169 static struct cmd_list_element
*catch_cmdlist
;
15171 /* List of subcommands for "tcatch". */
15172 static struct cmd_list_element
*tcatch_cmdlist
;
15175 add_catch_command (const char *name
, const char *docstring
,
15176 cmd_const_sfunc_ftype
*sfunc
,
15177 completer_ftype
*completer
,
15178 void *user_data_catch
,
15179 void *user_data_tcatch
)
15181 struct cmd_list_element
*command
;
15183 command
= add_cmd (name
, class_breakpoint
, docstring
,
15185 set_cmd_sfunc (command
, sfunc
);
15186 set_cmd_context (command
, user_data_catch
);
15187 set_cmd_completer (command
, completer
);
15189 command
= add_cmd (name
, class_breakpoint
, docstring
,
15191 set_cmd_sfunc (command
, sfunc
);
15192 set_cmd_context (command
, user_data_tcatch
);
15193 set_cmd_completer (command
, completer
);
15197 save_command (const char *arg
, int from_tty
)
15199 printf_unfiltered (_("\"save\" must be followed by "
15200 "the name of a save subcommand.\n"));
15201 help_list (save_cmdlist
, "save ", all_commands
, gdb_stdout
);
15204 struct breakpoint
*
15205 iterate_over_breakpoints (int (*callback
) (struct breakpoint
*, void *),
15208 struct breakpoint
*b
, *b_tmp
;
15210 ALL_BREAKPOINTS_SAFE (b
, b_tmp
)
15212 if ((*callback
) (b
, data
))
15219 /* Zero if any of the breakpoint's locations could be a location where
15220 functions have been inlined, nonzero otherwise. */
15223 is_non_inline_function (struct breakpoint
*b
)
15225 /* The shared library event breakpoint is set on the address of a
15226 non-inline function. */
15227 if (b
->type
== bp_shlib_event
)
15233 /* Nonzero if the specified PC cannot be a location where functions
15234 have been inlined. */
15237 pc_at_non_inline_function (const address_space
*aspace
, CORE_ADDR pc
,
15238 const struct target_waitstatus
*ws
)
15240 struct breakpoint
*b
;
15241 struct bp_location
*bl
;
15243 ALL_BREAKPOINTS (b
)
15245 if (!is_non_inline_function (b
))
15248 for (bl
= b
->loc
; bl
!= NULL
; bl
= bl
->next
)
15250 if (!bl
->shlib_disabled
15251 && bpstat_check_location (bl
, aspace
, pc
, ws
))
15259 /* Remove any references to OBJFILE which is going to be freed. */
15262 breakpoint_free_objfile (struct objfile
*objfile
)
15264 struct bp_location
**locp
, *loc
;
15266 ALL_BP_LOCATIONS (loc
, locp
)
15267 if (loc
->symtab
!= NULL
&& SYMTAB_OBJFILE (loc
->symtab
) == objfile
)
15268 loc
->symtab
= NULL
;
15272 initialize_breakpoint_ops (void)
15274 static int initialized
= 0;
15276 struct breakpoint_ops
*ops
;
15282 /* The breakpoint_ops structure to be inherit by all kinds of
15283 breakpoints (real breakpoints, i.e., user "break" breakpoints,
15284 internal and momentary breakpoints, etc.). */
15285 ops
= &bkpt_base_breakpoint_ops
;
15286 *ops
= base_breakpoint_ops
;
15287 ops
->re_set
= bkpt_re_set
;
15288 ops
->insert_location
= bkpt_insert_location
;
15289 ops
->remove_location
= bkpt_remove_location
;
15290 ops
->breakpoint_hit
= bkpt_breakpoint_hit
;
15291 ops
->create_sals_from_location
= bkpt_create_sals_from_location
;
15292 ops
->create_breakpoints_sal
= bkpt_create_breakpoints_sal
;
15293 ops
->decode_location
= bkpt_decode_location
;
15295 /* The breakpoint_ops structure to be used in regular breakpoints. */
15296 ops
= &bkpt_breakpoint_ops
;
15297 *ops
= bkpt_base_breakpoint_ops
;
15298 ops
->re_set
= bkpt_re_set
;
15299 ops
->resources_needed
= bkpt_resources_needed
;
15300 ops
->print_it
= bkpt_print_it
;
15301 ops
->print_mention
= bkpt_print_mention
;
15302 ops
->print_recreate
= bkpt_print_recreate
;
15304 /* Ranged breakpoints. */
15305 ops
= &ranged_breakpoint_ops
;
15306 *ops
= bkpt_breakpoint_ops
;
15307 ops
->breakpoint_hit
= breakpoint_hit_ranged_breakpoint
;
15308 ops
->resources_needed
= resources_needed_ranged_breakpoint
;
15309 ops
->print_it
= print_it_ranged_breakpoint
;
15310 ops
->print_one
= print_one_ranged_breakpoint
;
15311 ops
->print_one_detail
= print_one_detail_ranged_breakpoint
;
15312 ops
->print_mention
= print_mention_ranged_breakpoint
;
15313 ops
->print_recreate
= print_recreate_ranged_breakpoint
;
15315 /* Internal breakpoints. */
15316 ops
= &internal_breakpoint_ops
;
15317 *ops
= bkpt_base_breakpoint_ops
;
15318 ops
->re_set
= internal_bkpt_re_set
;
15319 ops
->check_status
= internal_bkpt_check_status
;
15320 ops
->print_it
= internal_bkpt_print_it
;
15321 ops
->print_mention
= internal_bkpt_print_mention
;
15323 /* Momentary breakpoints. */
15324 ops
= &momentary_breakpoint_ops
;
15325 *ops
= bkpt_base_breakpoint_ops
;
15326 ops
->re_set
= momentary_bkpt_re_set
;
15327 ops
->check_status
= momentary_bkpt_check_status
;
15328 ops
->print_it
= momentary_bkpt_print_it
;
15329 ops
->print_mention
= momentary_bkpt_print_mention
;
15331 /* Probe breakpoints. */
15332 ops
= &bkpt_probe_breakpoint_ops
;
15333 *ops
= bkpt_breakpoint_ops
;
15334 ops
->insert_location
= bkpt_probe_insert_location
;
15335 ops
->remove_location
= bkpt_probe_remove_location
;
15336 ops
->create_sals_from_location
= bkpt_probe_create_sals_from_location
;
15337 ops
->decode_location
= bkpt_probe_decode_location
;
15340 ops
= &watchpoint_breakpoint_ops
;
15341 *ops
= base_breakpoint_ops
;
15342 ops
->re_set
= re_set_watchpoint
;
15343 ops
->insert_location
= insert_watchpoint
;
15344 ops
->remove_location
= remove_watchpoint
;
15345 ops
->breakpoint_hit
= breakpoint_hit_watchpoint
;
15346 ops
->check_status
= check_status_watchpoint
;
15347 ops
->resources_needed
= resources_needed_watchpoint
;
15348 ops
->works_in_software_mode
= works_in_software_mode_watchpoint
;
15349 ops
->print_it
= print_it_watchpoint
;
15350 ops
->print_mention
= print_mention_watchpoint
;
15351 ops
->print_recreate
= print_recreate_watchpoint
;
15352 ops
->explains_signal
= explains_signal_watchpoint
;
15354 /* Masked watchpoints. */
15355 ops
= &masked_watchpoint_breakpoint_ops
;
15356 *ops
= watchpoint_breakpoint_ops
;
15357 ops
->insert_location
= insert_masked_watchpoint
;
15358 ops
->remove_location
= remove_masked_watchpoint
;
15359 ops
->resources_needed
= resources_needed_masked_watchpoint
;
15360 ops
->works_in_software_mode
= works_in_software_mode_masked_watchpoint
;
15361 ops
->print_it
= print_it_masked_watchpoint
;
15362 ops
->print_one_detail
= print_one_detail_masked_watchpoint
;
15363 ops
->print_mention
= print_mention_masked_watchpoint
;
15364 ops
->print_recreate
= print_recreate_masked_watchpoint
;
15367 ops
= &tracepoint_breakpoint_ops
;
15368 *ops
= base_breakpoint_ops
;
15369 ops
->re_set
= tracepoint_re_set
;
15370 ops
->breakpoint_hit
= tracepoint_breakpoint_hit
;
15371 ops
->print_one_detail
= tracepoint_print_one_detail
;
15372 ops
->print_mention
= tracepoint_print_mention
;
15373 ops
->print_recreate
= tracepoint_print_recreate
;
15374 ops
->create_sals_from_location
= tracepoint_create_sals_from_location
;
15375 ops
->create_breakpoints_sal
= tracepoint_create_breakpoints_sal
;
15376 ops
->decode_location
= tracepoint_decode_location
;
15378 /* Probe tracepoints. */
15379 ops
= &tracepoint_probe_breakpoint_ops
;
15380 *ops
= tracepoint_breakpoint_ops
;
15381 ops
->create_sals_from_location
= tracepoint_probe_create_sals_from_location
;
15382 ops
->decode_location
= tracepoint_probe_decode_location
;
15384 /* Static tracepoints with marker (`-m'). */
15385 ops
= &strace_marker_breakpoint_ops
;
15386 *ops
= tracepoint_breakpoint_ops
;
15387 ops
->create_sals_from_location
= strace_marker_create_sals_from_location
;
15388 ops
->create_breakpoints_sal
= strace_marker_create_breakpoints_sal
;
15389 ops
->decode_location
= strace_marker_decode_location
;
15391 /* Fork catchpoints. */
15392 ops
= &catch_fork_breakpoint_ops
;
15393 *ops
= base_breakpoint_ops
;
15394 ops
->insert_location
= insert_catch_fork
;
15395 ops
->remove_location
= remove_catch_fork
;
15396 ops
->breakpoint_hit
= breakpoint_hit_catch_fork
;
15397 ops
->print_it
= print_it_catch_fork
;
15398 ops
->print_one
= print_one_catch_fork
;
15399 ops
->print_mention
= print_mention_catch_fork
;
15400 ops
->print_recreate
= print_recreate_catch_fork
;
15402 /* Vfork catchpoints. */
15403 ops
= &catch_vfork_breakpoint_ops
;
15404 *ops
= base_breakpoint_ops
;
15405 ops
->insert_location
= insert_catch_vfork
;
15406 ops
->remove_location
= remove_catch_vfork
;
15407 ops
->breakpoint_hit
= breakpoint_hit_catch_vfork
;
15408 ops
->print_it
= print_it_catch_vfork
;
15409 ops
->print_one
= print_one_catch_vfork
;
15410 ops
->print_mention
= print_mention_catch_vfork
;
15411 ops
->print_recreate
= print_recreate_catch_vfork
;
15413 /* Exec catchpoints. */
15414 ops
= &catch_exec_breakpoint_ops
;
15415 *ops
= base_breakpoint_ops
;
15416 ops
->insert_location
= insert_catch_exec
;
15417 ops
->remove_location
= remove_catch_exec
;
15418 ops
->breakpoint_hit
= breakpoint_hit_catch_exec
;
15419 ops
->print_it
= print_it_catch_exec
;
15420 ops
->print_one
= print_one_catch_exec
;
15421 ops
->print_mention
= print_mention_catch_exec
;
15422 ops
->print_recreate
= print_recreate_catch_exec
;
15424 /* Solib-related catchpoints. */
15425 ops
= &catch_solib_breakpoint_ops
;
15426 *ops
= base_breakpoint_ops
;
15427 ops
->insert_location
= insert_catch_solib
;
15428 ops
->remove_location
= remove_catch_solib
;
15429 ops
->breakpoint_hit
= breakpoint_hit_catch_solib
;
15430 ops
->check_status
= check_status_catch_solib
;
15431 ops
->print_it
= print_it_catch_solib
;
15432 ops
->print_one
= print_one_catch_solib
;
15433 ops
->print_mention
= print_mention_catch_solib
;
15434 ops
->print_recreate
= print_recreate_catch_solib
;
15436 ops
= &dprintf_breakpoint_ops
;
15437 *ops
= bkpt_base_breakpoint_ops
;
15438 ops
->re_set
= dprintf_re_set
;
15439 ops
->resources_needed
= bkpt_resources_needed
;
15440 ops
->print_it
= bkpt_print_it
;
15441 ops
->print_mention
= bkpt_print_mention
;
15442 ops
->print_recreate
= dprintf_print_recreate
;
15443 ops
->after_condition_true
= dprintf_after_condition_true
;
15444 ops
->breakpoint_hit
= dprintf_breakpoint_hit
;
15447 /* Chain containing all defined "enable breakpoint" subcommands. */
15449 static struct cmd_list_element
*enablebreaklist
= NULL
;
15451 /* See breakpoint.h. */
15453 cmd_list_element
*commands_cmd_element
= nullptr;
15456 _initialize_breakpoint (void)
15458 struct cmd_list_element
*c
;
15460 initialize_breakpoint_ops ();
15462 gdb::observers::solib_unloaded
.attach (disable_breakpoints_in_unloaded_shlib
);
15463 gdb::observers::free_objfile
.attach (disable_breakpoints_in_freed_objfile
);
15464 gdb::observers::memory_changed
.attach (invalidate_bp_value_on_memory_change
);
15466 breakpoint_objfile_key
15467 = register_objfile_data_with_cleanup (NULL
, free_breakpoint_objfile_data
);
15469 breakpoint_chain
= 0;
15470 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
15471 before a breakpoint is set. */
15472 breakpoint_count
= 0;
15474 tracepoint_count
= 0;
15476 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
15477 Set ignore-count of breakpoint number N to COUNT.\n\
15478 Usage is `ignore N COUNT'."));
15480 commands_cmd_element
= add_com ("commands", class_breakpoint
,
15481 commands_command
, _("\
15482 Set commands to be executed when the given breakpoints are hit.\n\
15483 Give a space-separated breakpoint list as argument after \"commands\".\n\
15484 A list element can be a breakpoint number (e.g. `5') or a range of numbers\n\
15486 With no argument, the targeted breakpoint is the last one set.\n\
15487 The commands themselves follow starting on the next line.\n\
15488 Type a line containing \"end\" to indicate the end of them.\n\
15489 Give \"silent\" as the first line to make the breakpoint silent;\n\
15490 then no output is printed when it is hit, except what the commands print."));
15492 c
= add_com ("condition", class_breakpoint
, condition_command
, _("\
15493 Specify breakpoint number N to break only if COND is true.\n\
15494 Usage is `condition N COND', where N is an integer and COND is an\n\
15495 expression to be evaluated whenever breakpoint N is reached."));
15496 set_cmd_completer (c
, condition_completer
);
15498 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
15499 Set a temporary breakpoint.\n\
15500 Like \"break\" except the breakpoint is only temporary,\n\
15501 so it will be deleted when hit. Equivalent to \"break\" followed\n\
15502 by using \"enable delete\" on the breakpoint number.\n\
15504 BREAK_ARGS_HELP ("tbreak")));
15505 set_cmd_completer (c
, location_completer
);
15507 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
15508 Set a hardware assisted breakpoint.\n\
15509 Like \"break\" except the breakpoint requires hardware support,\n\
15510 some target hardware may not have this support.\n\
15512 BREAK_ARGS_HELP ("hbreak")));
15513 set_cmd_completer (c
, location_completer
);
15515 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
15516 Set a temporary hardware assisted breakpoint.\n\
15517 Like \"hbreak\" except the breakpoint is only temporary,\n\
15518 so it will be deleted when hit.\n\
15520 BREAK_ARGS_HELP ("thbreak")));
15521 set_cmd_completer (c
, location_completer
);
15523 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
15524 Enable some breakpoints.\n\
15525 Give breakpoint numbers (separated by spaces) as arguments.\n\
15526 With no subcommand, breakpoints are enabled until you command otherwise.\n\
15527 This is used to cancel the effect of the \"disable\" command.\n\
15528 With a subcommand you can enable temporarily."),
15529 &enablelist
, "enable ", 1, &cmdlist
);
15531 add_com_alias ("en", "enable", class_breakpoint
, 1);
15533 add_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
15534 Enable some breakpoints.\n\
15535 Give breakpoint numbers (separated by spaces) as arguments.\n\
15536 This is used to cancel the effect of the \"disable\" command.\n\
15537 May be abbreviated to simply \"enable\".\n"),
15538 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
15540 add_cmd ("once", no_class
, enable_once_command
, _("\
15541 Enable breakpoints for one hit. Give breakpoint numbers.\n\
15542 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
15545 add_cmd ("delete", no_class
, enable_delete_command
, _("\
15546 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
15547 If a breakpoint is hit while enabled in this fashion, it is deleted."),
15550 add_cmd ("count", no_class
, enable_count_command
, _("\
15551 Enable breakpoints for COUNT hits. Give count and then breakpoint numbers.\n\
15552 If a breakpoint is hit while enabled in this fashion,\n\
15553 the count is decremented; when it reaches zero, the breakpoint is disabled."),
15556 add_cmd ("delete", no_class
, enable_delete_command
, _("\
15557 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
15558 If a breakpoint is hit while enabled in this fashion, it is deleted."),
15561 add_cmd ("once", no_class
, enable_once_command
, _("\
15562 Enable breakpoints for one hit. Give breakpoint numbers.\n\
15563 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
15566 add_cmd ("count", no_class
, enable_count_command
, _("\
15567 Enable breakpoints for COUNT hits. Give count and then breakpoint numbers.\n\
15568 If a breakpoint is hit while enabled in this fashion,\n\
15569 the count is decremented; when it reaches zero, the breakpoint is disabled."),
15572 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
15573 Disable some breakpoints.\n\
15574 Arguments are breakpoint numbers with spaces in between.\n\
15575 To disable all breakpoints, give no argument.\n\
15576 A disabled breakpoint is not forgotten, but has no effect until re-enabled."),
15577 &disablelist
, "disable ", 1, &cmdlist
);
15578 add_com_alias ("dis", "disable", class_breakpoint
, 1);
15579 add_com_alias ("disa", "disable", class_breakpoint
, 1);
15581 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
15582 Disable some breakpoints.\n\
15583 Arguments are breakpoint numbers with spaces in between.\n\
15584 To disable all breakpoints, give no argument.\n\
15585 A disabled breakpoint is not forgotten, but has no effect until re-enabled.\n\
15586 This command may be abbreviated \"disable\"."),
15589 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
15590 Delete some breakpoints or auto-display expressions.\n\
15591 Arguments are breakpoint numbers with spaces in between.\n\
15592 To delete all breakpoints, give no argument.\n\
15594 Also a prefix command for deletion of other GDB objects.\n\
15595 The \"unset\" command is also an alias for \"delete\"."),
15596 &deletelist
, "delete ", 1, &cmdlist
);
15597 add_com_alias ("d", "delete", class_breakpoint
, 1);
15598 add_com_alias ("del", "delete", class_breakpoint
, 1);
15600 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
15601 Delete some breakpoints or auto-display expressions.\n\
15602 Arguments are breakpoint numbers with spaces in between.\n\
15603 To delete all breakpoints, give no argument.\n\
15604 This command may be abbreviated \"delete\"."),
15607 add_com ("clear", class_breakpoint
, clear_command
, _("\
15608 Clear breakpoint at specified location.\n\
15609 Argument may be a linespec, explicit, or address location as described below.\n\
15611 With no argument, clears all breakpoints in the line that the selected frame\n\
15612 is executing in.\n"
15613 "\n" LOCATION_HELP_STRING
"\n\
15614 See also the \"delete\" command which clears breakpoints by number."));
15615 add_com_alias ("cl", "clear", class_breakpoint
, 1);
15617 c
= add_com ("break", class_breakpoint
, break_command
, _("\
15618 Set breakpoint at specified location.\n"
15619 BREAK_ARGS_HELP ("break")));
15620 set_cmd_completer (c
, location_completer
);
15622 add_com_alias ("b", "break", class_run
, 1);
15623 add_com_alias ("br", "break", class_run
, 1);
15624 add_com_alias ("bre", "break", class_run
, 1);
15625 add_com_alias ("brea", "break", class_run
, 1);
15629 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
15630 Break in function/address or break at a line in the current file."),
15631 &stoplist
, "stop ", 1, &cmdlist
);
15632 add_cmd ("in", class_breakpoint
, stopin_command
,
15633 _("Break in function or address."), &stoplist
);
15634 add_cmd ("at", class_breakpoint
, stopat_command
,
15635 _("Break at a line in the current file."), &stoplist
);
15636 add_com ("status", class_info
, info_breakpoints_command
, _("\
15637 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
15638 The \"Type\" column indicates one of:\n\
15639 \tbreakpoint - normal breakpoint\n\
15640 \twatchpoint - watchpoint\n\
15641 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
15642 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
15643 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
15644 address and file/line number respectively.\n\
15646 Convenience variable \"$_\" and default examine address for \"x\"\n\
15647 are set to the address of the last breakpoint listed unless the command\n\
15648 is prefixed with \"server \".\n\n\
15649 Convenience variable \"$bpnum\" contains the number of the last\n\
15650 breakpoint set."));
15653 add_info ("breakpoints", info_breakpoints_command
, _("\
15654 Status of specified breakpoints (all user-settable breakpoints if no argument).\n\
15655 The \"Type\" column indicates one of:\n\
15656 \tbreakpoint - normal breakpoint\n\
15657 \twatchpoint - watchpoint\n\
15658 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
15659 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
15660 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
15661 address and file/line number respectively.\n\
15663 Convenience variable \"$_\" and default examine address for \"x\"\n\
15664 are set to the address of the last breakpoint listed unless the command\n\
15665 is prefixed with \"server \".\n\n\
15666 Convenience variable \"$bpnum\" contains the number of the last\n\
15667 breakpoint set."));
15669 add_info_alias ("b", "breakpoints", 1);
15671 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
15672 Status of all breakpoints, or breakpoint number NUMBER.\n\
15673 The \"Type\" column indicates one of:\n\
15674 \tbreakpoint - normal breakpoint\n\
15675 \twatchpoint - watchpoint\n\
15676 \tlongjmp - internal breakpoint used to step through longjmp()\n\
15677 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
15678 \tuntil - internal breakpoint used by the \"until\" command\n\
15679 \tfinish - internal breakpoint used by the \"finish\" command\n\
15680 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
15681 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
15682 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
15683 address and file/line number respectively.\n\
15685 Convenience variable \"$_\" and default examine address for \"x\"\n\
15686 are set to the address of the last breakpoint listed unless the command\n\
15687 is prefixed with \"server \".\n\n\
15688 Convenience variable \"$bpnum\" contains the number of the last\n\
15690 &maintenanceinfolist
);
15692 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
15693 Set catchpoints to catch events."),
15694 &catch_cmdlist
, "catch ",
15695 0/*allow-unknown*/, &cmdlist
);
15697 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
15698 Set temporary catchpoints to catch events."),
15699 &tcatch_cmdlist
, "tcatch ",
15700 0/*allow-unknown*/, &cmdlist
);
15702 add_catch_command ("fork", _("Catch calls to fork."),
15703 catch_fork_command_1
,
15705 (void *) (uintptr_t) catch_fork_permanent
,
15706 (void *) (uintptr_t) catch_fork_temporary
);
15707 add_catch_command ("vfork", _("Catch calls to vfork."),
15708 catch_fork_command_1
,
15710 (void *) (uintptr_t) catch_vfork_permanent
,
15711 (void *) (uintptr_t) catch_vfork_temporary
);
15712 add_catch_command ("exec", _("Catch calls to exec."),
15713 catch_exec_command_1
,
15717 add_catch_command ("load", _("Catch loads of shared libraries.\n\
15718 Usage: catch load [REGEX]\n\
15719 If REGEX is given, only stop for libraries matching the regular expression."),
15720 catch_load_command_1
,
15724 add_catch_command ("unload", _("Catch unloads of shared libraries.\n\
15725 Usage: catch unload [REGEX]\n\
15726 If REGEX is given, only stop for libraries matching the regular expression."),
15727 catch_unload_command_1
,
15732 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
15733 Set a watchpoint for an expression.\n\
15734 Usage: watch [-l|-location] EXPRESSION\n\
15735 A watchpoint stops execution of your program whenever the value of\n\
15736 an expression changes.\n\
15737 If -l or -location is given, this evaluates EXPRESSION and watches\n\
15738 the memory to which it refers."));
15739 set_cmd_completer (c
, expression_completer
);
15741 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
15742 Set a read watchpoint for an expression.\n\
15743 Usage: rwatch [-l|-location] EXPRESSION\n\
15744 A watchpoint stops execution of your program whenever the value of\n\
15745 an expression is read.\n\
15746 If -l or -location is given, this evaluates EXPRESSION and watches\n\
15747 the memory to which it refers."));
15748 set_cmd_completer (c
, expression_completer
);
15750 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
15751 Set a watchpoint for an expression.\n\
15752 Usage: awatch [-l|-location] EXPRESSION\n\
15753 A watchpoint stops execution of your program whenever the value of\n\
15754 an expression is either read or written.\n\
15755 If -l or -location is given, this evaluates EXPRESSION and watches\n\
15756 the memory to which it refers."));
15757 set_cmd_completer (c
, expression_completer
);
15759 add_info ("watchpoints", info_watchpoints_command
, _("\
15760 Status of specified watchpoints (all watchpoints if no argument)."));
15762 /* XXX: cagney/2005-02-23: This should be a boolean, and should
15763 respond to changes - contrary to the description. */
15764 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
15765 &can_use_hw_watchpoints
, _("\
15766 Set debugger's willingness to use watchpoint hardware."), _("\
15767 Show debugger's willingness to use watchpoint hardware."), _("\
15768 If zero, gdb will not use hardware for new watchpoints, even if\n\
15769 such is available. (However, any hardware watchpoints that were\n\
15770 created before setting this to nonzero, will continue to use watchpoint\n\
15773 show_can_use_hw_watchpoints
,
15774 &setlist
, &showlist
);
15776 can_use_hw_watchpoints
= 1;
15778 /* Tracepoint manipulation commands. */
15780 c
= add_com ("trace", class_breakpoint
, trace_command
, _("\
15781 Set a tracepoint at specified location.\n\
15783 BREAK_ARGS_HELP ("trace") "\n\
15784 Do \"help tracepoints\" for info on other tracepoint commands."));
15785 set_cmd_completer (c
, location_completer
);
15787 add_com_alias ("tp", "trace", class_alias
, 0);
15788 add_com_alias ("tr", "trace", class_alias
, 1);
15789 add_com_alias ("tra", "trace", class_alias
, 1);
15790 add_com_alias ("trac", "trace", class_alias
, 1);
15792 c
= add_com ("ftrace", class_breakpoint
, ftrace_command
, _("\
15793 Set a fast tracepoint at specified location.\n\
15795 BREAK_ARGS_HELP ("ftrace") "\n\
15796 Do \"help tracepoints\" for info on other tracepoint commands."));
15797 set_cmd_completer (c
, location_completer
);
15799 c
= add_com ("strace", class_breakpoint
, strace_command
, _("\
15800 Set a static tracepoint at location or marker.\n\
15802 strace [LOCATION] [if CONDITION]\n\
15803 LOCATION may be a linespec, explicit, or address location (described below) \n\
15804 or -m MARKER_ID.\n\n\
15805 If a marker id is specified, probe the marker with that name. With\n\
15806 no LOCATION, uses current execution address of the selected stack frame.\n\
15807 Static tracepoints accept an extra collect action -- ``collect $_sdata''.\n\
15808 This collects arbitrary user data passed in the probe point call to the\n\
15809 tracing library. You can inspect it when analyzing the trace buffer,\n\
15810 by printing the $_sdata variable like any other convenience variable.\n\
15812 CONDITION is a boolean expression.\n\
15813 \n" LOCATION_HELP_STRING
"\n\
15814 Multiple tracepoints at one place are permitted, and useful if their\n\
15815 conditions are different.\n\
15817 Do \"help breakpoints\" for info on other commands dealing with breakpoints.\n\
15818 Do \"help tracepoints\" for info on other tracepoint commands."));
15819 set_cmd_completer (c
, location_completer
);
15821 add_info ("tracepoints", info_tracepoints_command
, _("\
15822 Status of specified tracepoints (all tracepoints if no argument).\n\
15823 Convenience variable \"$tpnum\" contains the number of the\n\
15824 last tracepoint set."));
15826 add_info_alias ("tp", "tracepoints", 1);
15828 add_cmd ("tracepoints", class_trace
, delete_trace_command
, _("\
15829 Delete specified tracepoints.\n\
15830 Arguments are tracepoint numbers, separated by spaces.\n\
15831 No argument means delete all tracepoints."),
15833 add_alias_cmd ("tr", "tracepoints", class_trace
, 1, &deletelist
);
15835 c
= add_cmd ("tracepoints", class_trace
, disable_trace_command
, _("\
15836 Disable specified tracepoints.\n\
15837 Arguments are tracepoint numbers, separated by spaces.\n\
15838 No argument means disable all tracepoints."),
15840 deprecate_cmd (c
, "disable");
15842 c
= add_cmd ("tracepoints", class_trace
, enable_trace_command
, _("\
15843 Enable specified tracepoints.\n\
15844 Arguments are tracepoint numbers, separated by spaces.\n\
15845 No argument means enable all tracepoints."),
15847 deprecate_cmd (c
, "enable");
15849 add_com ("passcount", class_trace
, trace_pass_command
, _("\
15850 Set the passcount for a tracepoint.\n\
15851 The trace will end when the tracepoint has been passed 'count' times.\n\
15852 Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
15853 if TPNUM is omitted, passcount refers to the last tracepoint defined."));
15855 add_prefix_cmd ("save", class_breakpoint
, save_command
,
15856 _("Save breakpoint definitions as a script."),
15857 &save_cmdlist
, "save ",
15858 0/*allow-unknown*/, &cmdlist
);
15860 c
= add_cmd ("breakpoints", class_breakpoint
, save_breakpoints_command
, _("\
15861 Save current breakpoint definitions as a script.\n\
15862 This includes all types of breakpoints (breakpoints, watchpoints,\n\
15863 catchpoints, tracepoints). Use the 'source' command in another debug\n\
15864 session to restore them."),
15866 set_cmd_completer (c
, filename_completer
);
15868 c
= add_cmd ("tracepoints", class_trace
, save_tracepoints_command
, _("\
15869 Save current tracepoint definitions as a script.\n\
15870 Use the 'source' command in another debug session to restore them."),
15872 set_cmd_completer (c
, filename_completer
);
15874 c
= add_com_alias ("save-tracepoints", "save tracepoints", class_trace
, 0);
15875 deprecate_cmd (c
, "save tracepoints");
15877 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
15878 Breakpoint specific settings\n\
15879 Configure various breakpoint-specific variables such as\n\
15880 pending breakpoint behavior"),
15881 &breakpoint_set_cmdlist
, "set breakpoint ",
15882 0/*allow-unknown*/, &setlist
);
15883 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
15884 Breakpoint specific settings\n\
15885 Configure various breakpoint-specific variables such as\n\
15886 pending breakpoint behavior"),
15887 &breakpoint_show_cmdlist
, "show breakpoint ",
15888 0/*allow-unknown*/, &showlist
);
15890 add_setshow_auto_boolean_cmd ("pending", no_class
,
15891 &pending_break_support
, _("\
15892 Set debugger's behavior regarding pending breakpoints."), _("\
15893 Show debugger's behavior regarding pending breakpoints."), _("\
15894 If on, an unrecognized breakpoint location will cause gdb to create a\n\
15895 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
15896 an error. If auto, an unrecognized breakpoint location results in a\n\
15897 user-query to see if a pending breakpoint should be created."),
15899 show_pending_break_support
,
15900 &breakpoint_set_cmdlist
,
15901 &breakpoint_show_cmdlist
);
15903 pending_break_support
= AUTO_BOOLEAN_AUTO
;
15905 add_setshow_boolean_cmd ("auto-hw", no_class
,
15906 &automatic_hardware_breakpoints
, _("\
15907 Set automatic usage of hardware breakpoints."), _("\
15908 Show automatic usage of hardware breakpoints."), _("\
15909 If set, the debugger will automatically use hardware breakpoints for\n\
15910 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
15911 a warning will be emitted for such breakpoints."),
15913 show_automatic_hardware_breakpoints
,
15914 &breakpoint_set_cmdlist
,
15915 &breakpoint_show_cmdlist
);
15917 add_setshow_boolean_cmd ("always-inserted", class_support
,
15918 &always_inserted_mode
, _("\
15919 Set mode for inserting breakpoints."), _("\
15920 Show mode for inserting breakpoints."), _("\
15921 When this mode is on, breakpoints are inserted immediately as soon as\n\
15922 they're created, kept inserted even when execution stops, and removed\n\
15923 only when the user deletes them. When this mode is off (the default),\n\
15924 breakpoints are inserted only when execution continues, and removed\n\
15925 when execution stops."),
15927 &show_always_inserted_mode
,
15928 &breakpoint_set_cmdlist
,
15929 &breakpoint_show_cmdlist
);
15931 add_setshow_enum_cmd ("condition-evaluation", class_breakpoint
,
15932 condition_evaluation_enums
,
15933 &condition_evaluation_mode_1
, _("\
15934 Set mode of breakpoint condition evaluation."), _("\
15935 Show mode of breakpoint condition evaluation."), _("\
15936 When this is set to \"host\", breakpoint conditions will be\n\
15937 evaluated on the host's side by GDB. When it is set to \"target\",\n\
15938 breakpoint conditions will be downloaded to the target (if the target\n\
15939 supports such feature) and conditions will be evaluated on the target's side.\n\
15940 If this is set to \"auto\" (default), this will be automatically set to\n\
15941 \"target\" if it supports condition evaluation, otherwise it will\n\
15942 be set to \"gdb\""),
15943 &set_condition_evaluation_mode
,
15944 &show_condition_evaluation_mode
,
15945 &breakpoint_set_cmdlist
,
15946 &breakpoint_show_cmdlist
);
15948 add_com ("break-range", class_breakpoint
, break_range_command
, _("\
15949 Set a breakpoint for an address range.\n\
15950 break-range START-LOCATION, END-LOCATION\n\
15951 where START-LOCATION and END-LOCATION can be one of the following:\n\
15952 LINENUM, for that line in the current file,\n\
15953 FILE:LINENUM, for that line in that file,\n\
15954 +OFFSET, for that number of lines after the current line\n\
15955 or the start of the range\n\
15956 FUNCTION, for the first line in that function,\n\
15957 FILE:FUNCTION, to distinguish among like-named static functions.\n\
15958 *ADDRESS, for the instruction at that address.\n\
15960 The breakpoint will stop execution of the inferior whenever it executes\n\
15961 an instruction at any address within the [START-LOCATION, END-LOCATION]\n\
15962 range (including START-LOCATION and END-LOCATION)."));
15964 c
= add_com ("dprintf", class_breakpoint
, dprintf_command
, _("\
15965 Set a dynamic printf at specified location.\n\
15966 dprintf location,format string,arg1,arg2,...\n\
15967 location may be a linespec, explicit, or address location.\n"
15968 "\n" LOCATION_HELP_STRING
));
15969 set_cmd_completer (c
, location_completer
);
15971 add_setshow_enum_cmd ("dprintf-style", class_support
,
15972 dprintf_style_enums
, &dprintf_style
, _("\
15973 Set the style of usage for dynamic printf."), _("\
15974 Show the style of usage for dynamic printf."), _("\
15975 This setting chooses how GDB will do a dynamic printf.\n\
15976 If the value is \"gdb\", then the printing is done by GDB to its own\n\
15977 console, as with the \"printf\" command.\n\
15978 If the value is \"call\", the print is done by calling a function in your\n\
15979 program; by default printf(), but you can choose a different function or\n\
15980 output stream by setting dprintf-function and dprintf-channel."),
15981 update_dprintf_commands
, NULL
,
15982 &setlist
, &showlist
);
15984 dprintf_function
= xstrdup ("printf");
15985 add_setshow_string_cmd ("dprintf-function", class_support
,
15986 &dprintf_function
, _("\
15987 Set the function to use for dynamic printf"), _("\
15988 Show the function to use for dynamic printf"), NULL
,
15989 update_dprintf_commands
, NULL
,
15990 &setlist
, &showlist
);
15992 dprintf_channel
= xstrdup ("");
15993 add_setshow_string_cmd ("dprintf-channel", class_support
,
15994 &dprintf_channel
, _("\
15995 Set the channel to use for dynamic printf"), _("\
15996 Show the channel to use for dynamic printf"), NULL
,
15997 update_dprintf_commands
, NULL
,
15998 &setlist
, &showlist
);
16000 add_setshow_boolean_cmd ("disconnected-dprintf", no_class
,
16001 &disconnected_dprintf
, _("\
16002 Set whether dprintf continues after GDB disconnects."), _("\
16003 Show whether dprintf continues after GDB disconnects."), _("\
16004 Use this to let dprintf commands continue to hit and produce output\n\
16005 even if GDB disconnects or detaches from the target."),
16008 &setlist
, &showlist
);
16010 add_com ("agent-printf", class_vars
, agent_printf_command
, _("\
16011 agent-printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
16012 (target agent only) This is useful for formatted output in user-defined commands."));
16014 automatic_hardware_breakpoints
= 1;
16016 gdb::observers::about_to_proceed
.attach (breakpoint_about_to_proceed
);
16017 gdb::observers::thread_exit
.attach (remove_threaded_breakpoints
);