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"
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 : all_objfiles (current_program_space))
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 : all_objfiles (current_program_space))
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 : all_objfiles (current_program_space))
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 : all_objfiles (current_program_space))
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 struct cleanup *cleanup_if_error = make_bpstat_clear_actions_cleanup ();
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 discard_cleanups (cleanup_if_error);
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;
9233 struct cleanup *bkpt_chain = NULL;
9236 int prev_bkpt_count = breakpoint_count;
9238 gdb_assert (ops != NULL);
9240 /* If extra_string isn't useful, set it to NULL. */
9241 if (extra_string != NULL && *extra_string == '\0')
9242 extra_string = NULL;
9246 ops->create_sals_from_location (location, &canonical, type_wanted);
9248 CATCH (e, RETURN_MASK_ERROR)
9250 /* If caller is interested in rc value from parse, set
9252 if (e.error == NOT_FOUND_ERROR)
9254 /* If pending breakpoint support is turned off, throw
9257 if (pending_break_support == AUTO_BOOLEAN_FALSE)
9258 throw_exception (e);
9260 exception_print (gdb_stderr, e);
9262 /* If pending breakpoint support is auto query and the user
9263 selects no, then simply return the error code. */
9264 if (pending_break_support == AUTO_BOOLEAN_AUTO
9265 && !nquery (_("Make %s pending on future shared library load? "),
9266 bptype_string (type_wanted)))
9269 /* At this point, either the user was queried about setting
9270 a pending breakpoint and selected yes, or pending
9271 breakpoint behavior is on and thus a pending breakpoint
9272 is defaulted on behalf of the user. */
9276 throw_exception (e);
9280 if (!pending && canonical.lsals.empty ())
9283 /* ----------------------------- SNIP -----------------------------
9284 Anything added to the cleanup chain beyond this point is assumed
9285 to be part of a breakpoint. If the breakpoint create succeeds
9286 then the memory is not reclaimed. */
9287 bkpt_chain = make_cleanup (null_cleanup, 0);
9289 /* Resolve all line numbers to PC's and verify that the addresses
9290 are ok for the target. */
9293 for (auto &lsal : canonical.lsals)
9294 breakpoint_sals_to_pc (lsal.sals);
9297 /* Fast tracepoints may have additional restrictions on location. */
9298 if (!pending && type_wanted == bp_fast_tracepoint)
9300 for (const auto &lsal : canonical.lsals)
9301 check_fast_tracepoint_sals (gdbarch, lsal.sals);
9304 /* Verify that condition can be parsed, before setting any
9305 breakpoints. Allocate a separate condition expression for each
9309 gdb::unique_xmalloc_ptr<char> cond_string_copy;
9310 gdb::unique_xmalloc_ptr<char> extra_string_copy;
9317 const linespec_sals &lsal = canonical.lsals[0];
9319 /* Here we only parse 'arg' to separate condition
9320 from thread number, so parsing in context of first
9321 sal is OK. When setting the breakpoint we'll
9322 re-parse it in context of each sal. */
9324 find_condition_and_thread (extra_string, lsal.sals[0].pc,
9325 &cond, &thread, &task, &rest);
9326 cond_string_copy.reset (cond);
9327 extra_string_copy.reset (rest);
9331 if (type_wanted != bp_dprintf
9332 && extra_string != NULL && *extra_string != '\0')
9333 error (_("Garbage '%s' at end of location"), extra_string);
9335 /* Create a private copy of condition string. */
9337 cond_string_copy.reset (xstrdup (cond_string));
9338 /* Create a private copy of any extra string. */
9340 extra_string_copy.reset (xstrdup (extra_string));
9343 ops->create_breakpoints_sal (gdbarch, &canonical,
9344 std::move (cond_string_copy),
9345 std::move (extra_string_copy),
9347 tempflag ? disp_del : disp_donttouch,
9348 thread, task, ignore_count, ops,
9349 from_tty, enabled, internal, flags);
9353 std::unique_ptr <breakpoint> b = new_breakpoint_from_type (type_wanted);
9355 init_raw_breakpoint_without_location (b.get (), gdbarch, type_wanted, ops);
9356 b->location = copy_event_location (location);
9359 b->cond_string = NULL;
9362 /* Create a private copy of condition string. */
9363 b->cond_string = cond_string != NULL ? xstrdup (cond_string) : NULL;
9367 /* Create a private copy of any extra string. */
9368 b->extra_string = extra_string != NULL ? xstrdup (extra_string) : NULL;
9369 b->ignore_count = ignore_count;
9370 b->disposition = tempflag ? disp_del : disp_donttouch;
9371 b->condition_not_parsed = 1;
9372 b->enable_state = enabled ? bp_enabled : bp_disabled;
9373 if ((type_wanted != bp_breakpoint
9374 && type_wanted != bp_hardware_breakpoint) || thread != -1)
9375 b->pspace = current_program_space;
9377 install_breakpoint (internal, std::move (b), 0);
9380 if (canonical.lsals.size () > 1)
9382 warning (_("Multiple breakpoints were set.\nUse the "
9383 "\"delete\" command to delete unwanted breakpoints."));
9384 prev_breakpoint_count = prev_bkpt_count;
9387 /* That's it. Discard the cleanups for data inserted into the
9389 discard_cleanups (bkpt_chain);
9391 /* error call may happen here - have BKPT_CHAIN already discarded. */
9392 update_global_location_list (UGLL_MAY_INSERT);
9397 /* Set a breakpoint.
9398 ARG is a string describing breakpoint address,
9399 condition, and thread.
9400 FLAG specifies if a breakpoint is hardware on,
9401 and if breakpoint is temporary, using BP_HARDWARE_FLAG
9405 break_command_1 (const char *arg, int flag, int from_tty)
9407 int tempflag = flag & BP_TEMPFLAG;
9408 enum bptype type_wanted = (flag & BP_HARDWAREFLAG
9409 ? bp_hardware_breakpoint
9411 struct breakpoint_ops *ops;
9413 event_location_up location = string_to_event_location (&arg, current_language);
9415 /* Matching breakpoints on probes. */
9416 if (location != NULL
9417 && event_location_type (location.get ()) == PROBE_LOCATION)
9418 ops = &bkpt_probe_breakpoint_ops;
9420 ops = &bkpt_breakpoint_ops;
9422 create_breakpoint (get_current_arch (),
9424 NULL, 0, arg, 1 /* parse arg */,
9425 tempflag, type_wanted,
9426 0 /* Ignore count */,
9427 pending_break_support,
9435 /* Helper function for break_command_1 and disassemble_command. */
9438 resolve_sal_pc (struct symtab_and_line *sal)
9442 if (sal->pc == 0 && sal->symtab != NULL)
9444 if (!find_line_pc (sal->symtab, sal->line, &pc))
9445 error (_("No line %d in file \"%s\"."),
9446 sal->line, symtab_to_filename_for_display (sal->symtab));
9449 /* If this SAL corresponds to a breakpoint inserted using a line
9450 number, then skip the function prologue if necessary. */
9451 if (sal->explicit_line)
9452 skip_prologue_sal (sal);
9455 if (sal->section == 0 && sal->symtab != NULL)
9457 const struct blockvector *bv;
9458 const struct block *b;
9461 bv = blockvector_for_pc_sect (sal->pc, 0, &b,
9462 SYMTAB_COMPUNIT (sal->symtab));
9465 sym = block_linkage_function (b);
9468 fixup_symbol_section (sym, SYMTAB_OBJFILE (sal->symtab));
9469 sal->section = SYMBOL_OBJ_SECTION (SYMTAB_OBJFILE (sal->symtab),
9474 /* It really is worthwhile to have the section, so we'll
9475 just have to look harder. This case can be executed
9476 if we have line numbers but no functions (as can
9477 happen in assembly source). */
9479 scoped_restore_current_pspace_and_thread restore_pspace_thread;
9480 switch_to_program_space_and_thread (sal->pspace);
9482 bound_minimal_symbol msym = lookup_minimal_symbol_by_pc (sal->pc);
9484 sal->section = MSYMBOL_OBJ_SECTION (msym.objfile, msym.minsym);
9491 break_command (const char *arg, int from_tty)
9493 break_command_1 (arg, 0, from_tty);
9497 tbreak_command (const char *arg, int from_tty)
9499 break_command_1 (arg, BP_TEMPFLAG, from_tty);
9503 hbreak_command (const char *arg, int from_tty)
9505 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
9509 thbreak_command (const char *arg, int from_tty)
9511 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
9515 stop_command (const char *arg, int from_tty)
9517 printf_filtered (_("Specify the type of breakpoint to set.\n\
9518 Usage: stop in <function | address>\n\
9519 stop at <line>\n"));
9523 stopin_command (const char *arg, int from_tty)
9527 if (arg == (char *) NULL)
9529 else if (*arg != '*')
9531 const char *argptr = arg;
9534 /* Look for a ':'. If this is a line number specification, then
9535 say it is bad, otherwise, it should be an address or
9536 function/method name. */
9537 while (*argptr && !hasColon)
9539 hasColon = (*argptr == ':');
9544 badInput = (*argptr != ':'); /* Not a class::method */
9546 badInput = isdigit (*arg); /* a simple line number */
9550 printf_filtered (_("Usage: stop in <function | address>\n"));
9552 break_command_1 (arg, 0, from_tty);
9556 stopat_command (const char *arg, int from_tty)
9560 if (arg == (char *) NULL || *arg == '*') /* no line number */
9564 const char *argptr = arg;
9567 /* Look for a ':'. If there is a '::' then get out, otherwise
9568 it is probably a line number. */
9569 while (*argptr && !hasColon)
9571 hasColon = (*argptr == ':');
9576 badInput = (*argptr == ':'); /* we have class::method */
9578 badInput = !isdigit (*arg); /* not a line number */
9582 printf_filtered (_("Usage: stop at LINE\n"));
9584 break_command_1 (arg, 0, from_tty);
9587 /* The dynamic printf command is mostly like a regular breakpoint, but
9588 with a prewired command list consisting of a single output command,
9589 built from extra arguments supplied on the dprintf command
9593 dprintf_command (const char *arg, int from_tty)
9595 event_location_up location = string_to_event_location (&arg, current_language);
9597 /* If non-NULL, ARG should have been advanced past the location;
9598 the next character must be ','. */
9601 if (arg[0] != ',' || arg[1] == '\0')
9602 error (_("Format string required"));
9605 /* Skip the comma. */
9610 create_breakpoint (get_current_arch (),
9612 NULL, 0, arg, 1 /* parse arg */,
9614 0 /* Ignore count */,
9615 pending_break_support,
9616 &dprintf_breakpoint_ops,
9624 agent_printf_command (const char *arg, int from_tty)
9626 error (_("May only run agent-printf on the target"));
9629 /* Implement the "breakpoint_hit" breakpoint_ops method for
9630 ranged breakpoints. */
9633 breakpoint_hit_ranged_breakpoint (const struct bp_location *bl,
9634 const address_space *aspace,
9636 const struct target_waitstatus *ws)
9638 if (ws->kind != TARGET_WAITKIND_STOPPED
9639 || ws->value.sig != GDB_SIGNAL_TRAP)
9642 return breakpoint_address_match_range (bl->pspace->aspace, bl->address,
9643 bl->length, aspace, bp_addr);
9646 /* Implement the "resources_needed" breakpoint_ops method for
9647 ranged breakpoints. */
9650 resources_needed_ranged_breakpoint (const struct bp_location *bl)
9652 return target_ranged_break_num_registers ();
9655 /* Implement the "print_it" breakpoint_ops method for
9656 ranged breakpoints. */
9658 static enum print_stop_action
9659 print_it_ranged_breakpoint (bpstat bs)
9661 struct breakpoint *b = bs->breakpoint_at;
9662 struct bp_location *bl = b->loc;
9663 struct ui_out *uiout = current_uiout;
9665 gdb_assert (b->type == bp_hardware_breakpoint);
9667 /* Ranged breakpoints have only one location. */
9668 gdb_assert (bl && bl->next == NULL);
9670 annotate_breakpoint (b->number);
9672 maybe_print_thread_hit_breakpoint (uiout);
9674 if (b->disposition == disp_del)
9675 uiout->text ("Temporary ranged breakpoint ");
9677 uiout->text ("Ranged breakpoint ");
9678 if (uiout->is_mi_like_p ())
9680 uiout->field_string ("reason",
9681 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
9682 uiout->field_string ("disp", bpdisp_text (b->disposition));
9684 uiout->field_int ("bkptno", b->number);
9687 return PRINT_SRC_AND_LOC;
9690 /* Implement the "print_one" breakpoint_ops method for
9691 ranged breakpoints. */
9694 print_one_ranged_breakpoint (struct breakpoint *b,
9695 struct bp_location **last_loc)
9697 struct bp_location *bl = b->loc;
9698 struct value_print_options opts;
9699 struct ui_out *uiout = current_uiout;
9701 /* Ranged breakpoints have only one location. */
9702 gdb_assert (bl && bl->next == NULL);
9704 get_user_print_options (&opts);
9706 if (opts.addressprint)
9707 /* We don't print the address range here, it will be printed later
9708 by print_one_detail_ranged_breakpoint. */
9709 uiout->field_skip ("addr");
9711 print_breakpoint_location (b, bl);
9715 /* Implement the "print_one_detail" breakpoint_ops method for
9716 ranged breakpoints. */
9719 print_one_detail_ranged_breakpoint (const struct breakpoint *b,
9720 struct ui_out *uiout)
9722 CORE_ADDR address_start, address_end;
9723 struct bp_location *bl = b->loc;
9728 address_start = bl->address;
9729 address_end = address_start + bl->length - 1;
9731 uiout->text ("\taddress range: ");
9732 stb.printf ("[%s, %s]",
9733 print_core_address (bl->gdbarch, address_start),
9734 print_core_address (bl->gdbarch, address_end));
9735 uiout->field_stream ("addr", stb);
9739 /* Implement the "print_mention" breakpoint_ops method for
9740 ranged breakpoints. */
9743 print_mention_ranged_breakpoint (struct breakpoint *b)
9745 struct bp_location *bl = b->loc;
9746 struct ui_out *uiout = current_uiout;
9749 gdb_assert (b->type == bp_hardware_breakpoint);
9751 uiout->message (_("Hardware assisted ranged breakpoint %d from %s to %s."),
9752 b->number, paddress (bl->gdbarch, bl->address),
9753 paddress (bl->gdbarch, bl->address + bl->length - 1));
9756 /* Implement the "print_recreate" breakpoint_ops method for
9757 ranged breakpoints. */
9760 print_recreate_ranged_breakpoint (struct breakpoint *b, struct ui_file *fp)
9762 fprintf_unfiltered (fp, "break-range %s, %s",
9763 event_location_to_string (b->location.get ()),
9764 event_location_to_string (b->location_range_end.get ()));
9765 print_recreate_thread (b, fp);
9768 /* The breakpoint_ops structure to be used in ranged breakpoints. */
9770 static struct breakpoint_ops ranged_breakpoint_ops;
9772 /* Find the address where the end of the breakpoint range should be
9773 placed, given the SAL of the end of the range. This is so that if
9774 the user provides a line number, the end of the range is set to the
9775 last instruction of the given line. */
9778 find_breakpoint_range_end (struct symtab_and_line sal)
9782 /* If the user provided a PC value, use it. Otherwise,
9783 find the address of the end of the given location. */
9784 if (sal.explicit_pc)
9791 ret = find_line_pc_range (sal, &start, &end);
9793 error (_("Could not find location of the end of the range."));
9795 /* find_line_pc_range returns the start of the next line. */
9802 /* Implement the "break-range" CLI command. */
9805 break_range_command (const char *arg, int from_tty)
9807 const char *arg_start;
9808 struct linespec_result canonical_start, canonical_end;
9809 int bp_count, can_use_bp, length;
9811 struct breakpoint *b;
9813 /* We don't support software ranged breakpoints. */
9814 if (target_ranged_break_num_registers () < 0)
9815 error (_("This target does not support hardware ranged breakpoints."));
9817 bp_count = hw_breakpoint_used_count ();
9818 bp_count += target_ranged_break_num_registers ();
9819 can_use_bp = target_can_use_hardware_watchpoint (bp_hardware_breakpoint,
9822 error (_("Hardware breakpoints used exceeds limit."));
9824 arg = skip_spaces (arg);
9825 if (arg == NULL || arg[0] == '\0')
9826 error(_("No address range specified."));
9829 event_location_up start_location = string_to_event_location (&arg,
9831 parse_breakpoint_sals (start_location.get (), &canonical_start);
9834 error (_("Too few arguments."));
9835 else if (canonical_start.lsals.empty ())
9836 error (_("Could not find location of the beginning of the range."));
9838 const linespec_sals &lsal_start = canonical_start.lsals[0];
9840 if (canonical_start.lsals.size () > 1
9841 || lsal_start.sals.size () != 1)
9842 error (_("Cannot create a ranged breakpoint with multiple locations."));
9844 const symtab_and_line &sal_start = lsal_start.sals[0];
9845 std::string addr_string_start (arg_start, arg - arg_start);
9847 arg++; /* Skip the comma. */
9848 arg = skip_spaces (arg);
9850 /* Parse the end location. */
9854 /* We call decode_line_full directly here instead of using
9855 parse_breakpoint_sals because we need to specify the start location's
9856 symtab and line as the default symtab and line for the end of the
9857 range. This makes it possible to have ranges like "foo.c:27, +14",
9858 where +14 means 14 lines from the start location. */
9859 event_location_up end_location = string_to_event_location (&arg,
9861 decode_line_full (end_location.get (), DECODE_LINE_FUNFIRSTLINE, NULL,
9862 sal_start.symtab, sal_start.line,
9863 &canonical_end, NULL, NULL);
9865 if (canonical_end.lsals.empty ())
9866 error (_("Could not find location of the end of the range."));
9868 const linespec_sals &lsal_end = canonical_end.lsals[0];
9869 if (canonical_end.lsals.size () > 1
9870 || lsal_end.sals.size () != 1)
9871 error (_("Cannot create a ranged breakpoint with multiple locations."));
9873 const symtab_and_line &sal_end = lsal_end.sals[0];
9875 end = find_breakpoint_range_end (sal_end);
9876 if (sal_start.pc > end)
9877 error (_("Invalid address range, end precedes start."));
9879 length = end - sal_start.pc + 1;
9881 /* Length overflowed. */
9882 error (_("Address range too large."));
9883 else if (length == 1)
9885 /* This range is simple enough to be handled by
9886 the `hbreak' command. */
9887 hbreak_command (&addr_string_start[0], 1);
9892 /* Now set up the breakpoint. */
9893 b = set_raw_breakpoint (get_current_arch (), sal_start,
9894 bp_hardware_breakpoint, &ranged_breakpoint_ops);
9895 set_breakpoint_count (breakpoint_count + 1);
9896 b->number = breakpoint_count;
9897 b->disposition = disp_donttouch;
9898 b->location = std::move (start_location);
9899 b->location_range_end = std::move (end_location);
9900 b->loc->length = length;
9903 gdb::observers::breakpoint_created.notify (b);
9904 update_global_location_list (UGLL_MAY_INSERT);
9907 /* Return non-zero if EXP is verified as constant. Returned zero
9908 means EXP is variable. Also the constant detection may fail for
9909 some constant expressions and in such case still falsely return
9913 watchpoint_exp_is_const (const struct expression *exp)
9921 /* We are only interested in the descriptor of each element. */
9922 operator_length (exp, i, &oplenp, &argsp);
9925 switch (exp->elts[i].opcode)
9935 case BINOP_LOGICAL_AND:
9936 case BINOP_LOGICAL_OR:
9937 case BINOP_BITWISE_AND:
9938 case BINOP_BITWISE_IOR:
9939 case BINOP_BITWISE_XOR:
9941 case BINOP_NOTEQUAL:
9967 case OP_OBJC_NSSTRING:
9970 case UNOP_LOGICAL_NOT:
9971 case UNOP_COMPLEMENT:
9976 case UNOP_CAST_TYPE:
9977 case UNOP_REINTERPRET_CAST:
9978 case UNOP_DYNAMIC_CAST:
9979 /* Unary, binary and ternary operators: We have to check
9980 their operands. If they are constant, then so is the
9981 result of that operation. For instance, if A and B are
9982 determined to be constants, then so is "A + B".
9984 UNOP_IND is one exception to the rule above, because the
9985 value of *ADDR is not necessarily a constant, even when
9990 /* Check whether the associated symbol is a constant.
9992 We use SYMBOL_CLASS rather than TYPE_CONST because it's
9993 possible that a buggy compiler could mark a variable as
9994 constant even when it is not, and TYPE_CONST would return
9995 true in this case, while SYMBOL_CLASS wouldn't.
9997 We also have to check for function symbols because they
9998 are always constant. */
10000 struct symbol *s = exp->elts[i + 2].symbol;
10002 if (SYMBOL_CLASS (s) != LOC_BLOCK
10003 && SYMBOL_CLASS (s) != LOC_CONST
10004 && SYMBOL_CLASS (s) != LOC_CONST_BYTES)
10009 /* The default action is to return 0 because we are using
10010 the optimistic approach here: If we don't know something,
10011 then it is not a constant. */
10020 /* Watchpoint destructor. */
10022 watchpoint::~watchpoint ()
10024 xfree (this->exp_string);
10025 xfree (this->exp_string_reparse);
10028 /* Implement the "re_set" breakpoint_ops method for watchpoints. */
10031 re_set_watchpoint (struct breakpoint *b)
10033 struct watchpoint *w = (struct watchpoint *) b;
10035 /* Watchpoint can be either on expression using entirely global
10036 variables, or it can be on local variables.
10038 Watchpoints of the first kind are never auto-deleted, and even
10039 persist across program restarts. Since they can use variables
10040 from shared libraries, we need to reparse expression as libraries
10041 are loaded and unloaded.
10043 Watchpoints on local variables can also change meaning as result
10044 of solib event. For example, if a watchpoint uses both a local
10045 and a global variables in expression, it's a local watchpoint,
10046 but unloading of a shared library will make the expression
10047 invalid. This is not a very common use case, but we still
10048 re-evaluate expression, to avoid surprises to the user.
10050 Note that for local watchpoints, we re-evaluate it only if
10051 watchpoints frame id is still valid. If it's not, it means the
10052 watchpoint is out of scope and will be deleted soon. In fact,
10053 I'm not sure we'll ever be called in this case.
10055 If a local watchpoint's frame id is still valid, then
10056 w->exp_valid_block is likewise valid, and we can safely use it.
10058 Don't do anything about disabled watchpoints, since they will be
10059 reevaluated again when enabled. */
10060 update_watchpoint (w, 1 /* reparse */);
10063 /* Implement the "insert" breakpoint_ops method for hardware watchpoints. */
10066 insert_watchpoint (struct bp_location *bl)
10068 struct watchpoint *w = (struct watchpoint *) bl->owner;
10069 int length = w->exact ? 1 : bl->length;
10071 return target_insert_watchpoint (bl->address, length, bl->watchpoint_type,
10072 w->cond_exp.get ());
10075 /* Implement the "remove" breakpoint_ops method for hardware watchpoints. */
10078 remove_watchpoint (struct bp_location *bl, enum remove_bp_reason reason)
10080 struct watchpoint *w = (struct watchpoint *) bl->owner;
10081 int length = w->exact ? 1 : bl->length;
10083 return target_remove_watchpoint (bl->address, length, bl->watchpoint_type,
10084 w->cond_exp.get ());
10088 breakpoint_hit_watchpoint (const struct bp_location *bl,
10089 const address_space *aspace, CORE_ADDR bp_addr,
10090 const struct target_waitstatus *ws)
10092 struct breakpoint *b = bl->owner;
10093 struct watchpoint *w = (struct watchpoint *) b;
10095 /* Continuable hardware watchpoints are treated as non-existent if the
10096 reason we stopped wasn't a hardware watchpoint (we didn't stop on
10097 some data address). Otherwise gdb won't stop on a break instruction
10098 in the code (not from a breakpoint) when a hardware watchpoint has
10099 been defined. Also skip watchpoints which we know did not trigger
10100 (did not match the data address). */
10101 if (is_hardware_watchpoint (b)
10102 && w->watchpoint_triggered == watch_triggered_no)
10109 check_status_watchpoint (bpstat bs)
10111 gdb_assert (is_watchpoint (bs->breakpoint_at));
10113 bpstat_check_watchpoint (bs);
10116 /* Implement the "resources_needed" breakpoint_ops method for
10117 hardware watchpoints. */
10120 resources_needed_watchpoint (const struct bp_location *bl)
10122 struct watchpoint *w = (struct watchpoint *) bl->owner;
10123 int length = w->exact? 1 : bl->length;
10125 return target_region_ok_for_hw_watchpoint (bl->address, length);
10128 /* Implement the "works_in_software_mode" breakpoint_ops method for
10129 hardware watchpoints. */
10132 works_in_software_mode_watchpoint (const struct breakpoint *b)
10134 /* Read and access watchpoints only work with hardware support. */
10135 return b->type == bp_watchpoint || b->type == bp_hardware_watchpoint;
10138 static enum print_stop_action
10139 print_it_watchpoint (bpstat bs)
10141 struct breakpoint *b;
10142 enum print_stop_action result;
10143 struct watchpoint *w;
10144 struct ui_out *uiout = current_uiout;
10146 gdb_assert (bs->bp_location_at != NULL);
10148 b = bs->breakpoint_at;
10149 w = (struct watchpoint *) b;
10151 annotate_watchpoint (b->number);
10152 maybe_print_thread_hit_breakpoint (uiout);
10156 gdb::optional<ui_out_emit_tuple> tuple_emitter;
10159 case bp_watchpoint:
10160 case bp_hardware_watchpoint:
10161 if (uiout->is_mi_like_p ())
10162 uiout->field_string
10163 ("reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER));
10165 tuple_emitter.emplace (uiout, "value");
10166 uiout->text ("\nOld value = ");
10167 watchpoint_value_print (bs->old_val.get (), &stb);
10168 uiout->field_stream ("old", stb);
10169 uiout->text ("\nNew value = ");
10170 watchpoint_value_print (w->val.get (), &stb);
10171 uiout->field_stream ("new", stb);
10172 uiout->text ("\n");
10173 /* More than one watchpoint may have been triggered. */
10174 result = PRINT_UNKNOWN;
10177 case bp_read_watchpoint:
10178 if (uiout->is_mi_like_p ())
10179 uiout->field_string
10180 ("reason", async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER));
10182 tuple_emitter.emplace (uiout, "value");
10183 uiout->text ("\nValue = ");
10184 watchpoint_value_print (w->val.get (), &stb);
10185 uiout->field_stream ("value", stb);
10186 uiout->text ("\n");
10187 result = PRINT_UNKNOWN;
10190 case bp_access_watchpoint:
10191 if (bs->old_val != NULL)
10193 if (uiout->is_mi_like_p ())
10194 uiout->field_string
10196 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER));
10198 tuple_emitter.emplace (uiout, "value");
10199 uiout->text ("\nOld value = ");
10200 watchpoint_value_print (bs->old_val.get (), &stb);
10201 uiout->field_stream ("old", stb);
10202 uiout->text ("\nNew value = ");
10207 if (uiout->is_mi_like_p ())
10208 uiout->field_string
10210 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER));
10211 tuple_emitter.emplace (uiout, "value");
10212 uiout->text ("\nValue = ");
10214 watchpoint_value_print (w->val.get (), &stb);
10215 uiout->field_stream ("new", stb);
10216 uiout->text ("\n");
10217 result = PRINT_UNKNOWN;
10220 result = PRINT_UNKNOWN;
10226 /* Implement the "print_mention" breakpoint_ops method for hardware
10230 print_mention_watchpoint (struct breakpoint *b)
10232 struct watchpoint *w = (struct watchpoint *) b;
10233 struct ui_out *uiout = current_uiout;
10234 const char *tuple_name;
10238 case bp_watchpoint:
10239 uiout->text ("Watchpoint ");
10240 tuple_name = "wpt";
10242 case bp_hardware_watchpoint:
10243 uiout->text ("Hardware watchpoint ");
10244 tuple_name = "wpt";
10246 case bp_read_watchpoint:
10247 uiout->text ("Hardware read watchpoint ");
10248 tuple_name = "hw-rwpt";
10250 case bp_access_watchpoint:
10251 uiout->text ("Hardware access (read/write) watchpoint ");
10252 tuple_name = "hw-awpt";
10255 internal_error (__FILE__, __LINE__,
10256 _("Invalid hardware watchpoint type."));
10259 ui_out_emit_tuple tuple_emitter (uiout, tuple_name);
10260 uiout->field_int ("number", b->number);
10261 uiout->text (": ");
10262 uiout->field_string ("exp", w->exp_string);
10265 /* Implement the "print_recreate" breakpoint_ops method for
10269 print_recreate_watchpoint (struct breakpoint *b, struct ui_file *fp)
10271 struct watchpoint *w = (struct watchpoint *) b;
10275 case bp_watchpoint:
10276 case bp_hardware_watchpoint:
10277 fprintf_unfiltered (fp, "watch");
10279 case bp_read_watchpoint:
10280 fprintf_unfiltered (fp, "rwatch");
10282 case bp_access_watchpoint:
10283 fprintf_unfiltered (fp, "awatch");
10286 internal_error (__FILE__, __LINE__,
10287 _("Invalid watchpoint type."));
10290 fprintf_unfiltered (fp, " %s", w->exp_string);
10291 print_recreate_thread (b, fp);
10294 /* Implement the "explains_signal" breakpoint_ops method for
10298 explains_signal_watchpoint (struct breakpoint *b, enum gdb_signal sig)
10300 /* A software watchpoint cannot cause a signal other than
10301 GDB_SIGNAL_TRAP. */
10302 if (b->type == bp_watchpoint && sig != GDB_SIGNAL_TRAP)
10308 /* The breakpoint_ops structure to be used in hardware watchpoints. */
10310 static struct breakpoint_ops watchpoint_breakpoint_ops;
10312 /* Implement the "insert" breakpoint_ops method for
10313 masked hardware watchpoints. */
10316 insert_masked_watchpoint (struct bp_location *bl)
10318 struct watchpoint *w = (struct watchpoint *) bl->owner;
10320 return target_insert_mask_watchpoint (bl->address, w->hw_wp_mask,
10321 bl->watchpoint_type);
10324 /* Implement the "remove" breakpoint_ops method for
10325 masked hardware watchpoints. */
10328 remove_masked_watchpoint (struct bp_location *bl, enum remove_bp_reason reason)
10330 struct watchpoint *w = (struct watchpoint *) bl->owner;
10332 return target_remove_mask_watchpoint (bl->address, w->hw_wp_mask,
10333 bl->watchpoint_type);
10336 /* Implement the "resources_needed" breakpoint_ops method for
10337 masked hardware watchpoints. */
10340 resources_needed_masked_watchpoint (const struct bp_location *bl)
10342 struct watchpoint *w = (struct watchpoint *) bl->owner;
10344 return target_masked_watch_num_registers (bl->address, w->hw_wp_mask);
10347 /* Implement the "works_in_software_mode" breakpoint_ops method for
10348 masked hardware watchpoints. */
10351 works_in_software_mode_masked_watchpoint (const struct breakpoint *b)
10356 /* Implement the "print_it" breakpoint_ops method for
10357 masked hardware watchpoints. */
10359 static enum print_stop_action
10360 print_it_masked_watchpoint (bpstat bs)
10362 struct breakpoint *b = bs->breakpoint_at;
10363 struct ui_out *uiout = current_uiout;
10365 /* Masked watchpoints have only one location. */
10366 gdb_assert (b->loc && b->loc->next == NULL);
10368 annotate_watchpoint (b->number);
10369 maybe_print_thread_hit_breakpoint (uiout);
10373 case bp_hardware_watchpoint:
10374 if (uiout->is_mi_like_p ())
10375 uiout->field_string
10376 ("reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER));
10379 case bp_read_watchpoint:
10380 if (uiout->is_mi_like_p ())
10381 uiout->field_string
10382 ("reason", async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER));
10385 case bp_access_watchpoint:
10386 if (uiout->is_mi_like_p ())
10387 uiout->field_string
10389 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER));
10392 internal_error (__FILE__, __LINE__,
10393 _("Invalid hardware watchpoint type."));
10397 uiout->text (_("\n\
10398 Check the underlying instruction at PC for the memory\n\
10399 address and value which triggered this watchpoint.\n"));
10400 uiout->text ("\n");
10402 /* More than one watchpoint may have been triggered. */
10403 return PRINT_UNKNOWN;
10406 /* Implement the "print_one_detail" breakpoint_ops method for
10407 masked hardware watchpoints. */
10410 print_one_detail_masked_watchpoint (const struct breakpoint *b,
10411 struct ui_out *uiout)
10413 struct watchpoint *w = (struct watchpoint *) b;
10415 /* Masked watchpoints have only one location. */
10416 gdb_assert (b->loc && b->loc->next == NULL);
10418 uiout->text ("\tmask ");
10419 uiout->field_core_addr ("mask", b->loc->gdbarch, w->hw_wp_mask);
10420 uiout->text ("\n");
10423 /* Implement the "print_mention" breakpoint_ops method for
10424 masked hardware watchpoints. */
10427 print_mention_masked_watchpoint (struct breakpoint *b)
10429 struct watchpoint *w = (struct watchpoint *) b;
10430 struct ui_out *uiout = current_uiout;
10431 const char *tuple_name;
10435 case bp_hardware_watchpoint:
10436 uiout->text ("Masked hardware watchpoint ");
10437 tuple_name = "wpt";
10439 case bp_read_watchpoint:
10440 uiout->text ("Masked hardware read watchpoint ");
10441 tuple_name = "hw-rwpt";
10443 case bp_access_watchpoint:
10444 uiout->text ("Masked hardware access (read/write) watchpoint ");
10445 tuple_name = "hw-awpt";
10448 internal_error (__FILE__, __LINE__,
10449 _("Invalid hardware watchpoint type."));
10452 ui_out_emit_tuple tuple_emitter (uiout, tuple_name);
10453 uiout->field_int ("number", b->number);
10454 uiout->text (": ");
10455 uiout->field_string ("exp", w->exp_string);
10458 /* Implement the "print_recreate" breakpoint_ops method for
10459 masked hardware watchpoints. */
10462 print_recreate_masked_watchpoint (struct breakpoint *b, struct ui_file *fp)
10464 struct watchpoint *w = (struct watchpoint *) b;
10469 case bp_hardware_watchpoint:
10470 fprintf_unfiltered (fp, "watch");
10472 case bp_read_watchpoint:
10473 fprintf_unfiltered (fp, "rwatch");
10475 case bp_access_watchpoint:
10476 fprintf_unfiltered (fp, "awatch");
10479 internal_error (__FILE__, __LINE__,
10480 _("Invalid hardware watchpoint type."));
10483 sprintf_vma (tmp, w->hw_wp_mask);
10484 fprintf_unfiltered (fp, " %s mask 0x%s", w->exp_string, tmp);
10485 print_recreate_thread (b, fp);
10488 /* The breakpoint_ops structure to be used in masked hardware watchpoints. */
10490 static struct breakpoint_ops masked_watchpoint_breakpoint_ops;
10492 /* Tell whether the given watchpoint is a masked hardware watchpoint. */
10495 is_masked_watchpoint (const struct breakpoint *b)
10497 return b->ops == &masked_watchpoint_breakpoint_ops;
10500 /* accessflag: hw_write: watch write,
10501 hw_read: watch read,
10502 hw_access: watch access (read or write) */
10504 watch_command_1 (const char *arg, int accessflag, int from_tty,
10505 int just_location, int internal)
10507 struct breakpoint *scope_breakpoint = NULL;
10508 const struct block *exp_valid_block = NULL, *cond_exp_valid_block = NULL;
10509 struct value *result;
10510 int saved_bitpos = 0, saved_bitsize = 0;
10511 const char *exp_start = NULL;
10512 const char *exp_end = NULL;
10513 const char *tok, *end_tok;
10515 const char *cond_start = NULL;
10516 const char *cond_end = NULL;
10517 enum bptype bp_type;
10520 /* Flag to indicate whether we are going to use masks for
10521 the hardware watchpoint. */
10523 CORE_ADDR mask = 0;
10525 /* Make sure that we actually have parameters to parse. */
10526 if (arg != NULL && arg[0] != '\0')
10528 const char *value_start;
10530 exp_end = arg + strlen (arg);
10532 /* Look for "parameter value" pairs at the end
10533 of the arguments string. */
10534 for (tok = exp_end - 1; tok > arg; tok--)
10536 /* Skip whitespace at the end of the argument list. */
10537 while (tok > arg && (*tok == ' ' || *tok == '\t'))
10540 /* Find the beginning of the last token.
10541 This is the value of the parameter. */
10542 while (tok > arg && (*tok != ' ' && *tok != '\t'))
10544 value_start = tok + 1;
10546 /* Skip whitespace. */
10547 while (tok > arg && (*tok == ' ' || *tok == '\t'))
10552 /* Find the beginning of the second to last token.
10553 This is the parameter itself. */
10554 while (tok > arg && (*tok != ' ' && *tok != '\t'))
10557 toklen = end_tok - tok + 1;
10559 if (toklen == 6 && startswith (tok, "thread"))
10561 struct thread_info *thr;
10562 /* At this point we've found a "thread" token, which means
10563 the user is trying to set a watchpoint that triggers
10564 only in a specific thread. */
10568 error(_("You can specify only one thread."));
10570 /* Extract the thread ID from the next token. */
10571 thr = parse_thread_id (value_start, &endp);
10573 /* Check if the user provided a valid thread ID. */
10574 if (*endp != ' ' && *endp != '\t' && *endp != '\0')
10575 invalid_thread_id_error (value_start);
10577 thread = thr->global_num;
10579 else if (toklen == 4 && startswith (tok, "mask"))
10581 /* We've found a "mask" token, which means the user wants to
10582 create a hardware watchpoint that is going to have the mask
10584 struct value *mask_value, *mark;
10587 error(_("You can specify only one mask."));
10589 use_mask = just_location = 1;
10591 mark = value_mark ();
10592 mask_value = parse_to_comma_and_eval (&value_start);
10593 mask = value_as_address (mask_value);
10594 value_free_to_mark (mark);
10597 /* We didn't recognize what we found. We should stop here. */
10600 /* Truncate the string and get rid of the "parameter value" pair before
10601 the arguments string is parsed by the parse_exp_1 function. */
10608 /* Parse the rest of the arguments. From here on out, everything
10609 is in terms of a newly allocated string instead of the original
10611 innermost_block.reset ();
10612 std::string expression (arg, exp_end - arg);
10613 exp_start = arg = expression.c_str ();
10614 expression_up exp = parse_exp_1 (&arg, 0, 0, 0);
10616 /* Remove trailing whitespace from the expression before saving it.
10617 This makes the eventual display of the expression string a bit
10619 while (exp_end > exp_start && (exp_end[-1] == ' ' || exp_end[-1] == '\t'))
10622 /* Checking if the expression is not constant. */
10623 if (watchpoint_exp_is_const (exp.get ()))
10627 len = exp_end - exp_start;
10628 while (len > 0 && isspace (exp_start[len - 1]))
10630 error (_("Cannot watch constant value `%.*s'."), len, exp_start);
10633 exp_valid_block = innermost_block.block ();
10634 struct value *mark = value_mark ();
10635 struct value *val_as_value = nullptr;
10636 fetch_subexp_value (exp.get (), &pc, &val_as_value, &result, NULL,
10639 if (val_as_value != NULL && just_location)
10641 saved_bitpos = value_bitpos (val_as_value);
10642 saved_bitsize = value_bitsize (val_as_value);
10650 exp_valid_block = NULL;
10651 val = release_value (value_addr (result));
10652 value_free_to_mark (mark);
10656 ret = target_masked_watch_num_registers (value_as_address (val.get ()),
10659 error (_("This target does not support masked watchpoints."));
10660 else if (ret == -2)
10661 error (_("Invalid mask or memory region."));
10664 else if (val_as_value != NULL)
10665 val = release_value (val_as_value);
10667 tok = skip_spaces (arg);
10668 end_tok = skip_to_space (tok);
10670 toklen = end_tok - tok;
10671 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
10673 innermost_block.reset ();
10674 tok = cond_start = end_tok + 1;
10675 parse_exp_1 (&tok, 0, 0, 0);
10677 /* The watchpoint expression may not be local, but the condition
10678 may still be. E.g.: `watch global if local > 0'. */
10679 cond_exp_valid_block = innermost_block.block ();
10684 error (_("Junk at end of command."));
10686 frame_info *wp_frame = block_innermost_frame (exp_valid_block);
10688 /* Save this because create_internal_breakpoint below invalidates
10690 frame_id watchpoint_frame = get_frame_id (wp_frame);
10692 /* If the expression is "local", then set up a "watchpoint scope"
10693 breakpoint at the point where we've left the scope of the watchpoint
10694 expression. Create the scope breakpoint before the watchpoint, so
10695 that we will encounter it first in bpstat_stop_status. */
10696 if (exp_valid_block != NULL && wp_frame != NULL)
10698 frame_id caller_frame_id = frame_unwind_caller_id (wp_frame);
10700 if (frame_id_p (caller_frame_id))
10702 gdbarch *caller_arch = frame_unwind_caller_arch (wp_frame);
10703 CORE_ADDR caller_pc = frame_unwind_caller_pc (wp_frame);
10706 = create_internal_breakpoint (caller_arch, caller_pc,
10707 bp_watchpoint_scope,
10708 &momentary_breakpoint_ops);
10710 /* create_internal_breakpoint could invalidate WP_FRAME. */
10713 scope_breakpoint->enable_state = bp_enabled;
10715 /* Automatically delete the breakpoint when it hits. */
10716 scope_breakpoint->disposition = disp_del;
10718 /* Only break in the proper frame (help with recursion). */
10719 scope_breakpoint->frame_id = caller_frame_id;
10721 /* Set the address at which we will stop. */
10722 scope_breakpoint->loc->gdbarch = caller_arch;
10723 scope_breakpoint->loc->requested_address = caller_pc;
10724 scope_breakpoint->loc->address
10725 = adjust_breakpoint_address (scope_breakpoint->loc->gdbarch,
10726 scope_breakpoint->loc->requested_address,
10727 scope_breakpoint->type);
10731 /* Now set up the breakpoint. We create all watchpoints as hardware
10732 watchpoints here even if hardware watchpoints are turned off, a call
10733 to update_watchpoint later in this function will cause the type to
10734 drop back to bp_watchpoint (software watchpoint) if required. */
10736 if (accessflag == hw_read)
10737 bp_type = bp_read_watchpoint;
10738 else if (accessflag == hw_access)
10739 bp_type = bp_access_watchpoint;
10741 bp_type = bp_hardware_watchpoint;
10743 std::unique_ptr<watchpoint> w (new watchpoint ());
10746 init_raw_breakpoint_without_location (w.get (), NULL, bp_type,
10747 &masked_watchpoint_breakpoint_ops);
10749 init_raw_breakpoint_without_location (w.get (), NULL, bp_type,
10750 &watchpoint_breakpoint_ops);
10751 w->thread = thread;
10752 w->disposition = disp_donttouch;
10753 w->pspace = current_program_space;
10754 w->exp = std::move (exp);
10755 w->exp_valid_block = exp_valid_block;
10756 w->cond_exp_valid_block = cond_exp_valid_block;
10759 struct type *t = value_type (val.get ());
10760 CORE_ADDR addr = value_as_address (val.get ());
10762 w->exp_string_reparse
10763 = current_language->la_watch_location_expression (t, addr).release ();
10765 w->exp_string = xstrprintf ("-location %.*s",
10766 (int) (exp_end - exp_start), exp_start);
10769 w->exp_string = savestring (exp_start, exp_end - exp_start);
10773 w->hw_wp_mask = mask;
10778 w->val_bitpos = saved_bitpos;
10779 w->val_bitsize = saved_bitsize;
10784 w->cond_string = savestring (cond_start, cond_end - cond_start);
10786 w->cond_string = 0;
10788 if (frame_id_p (watchpoint_frame))
10790 w->watchpoint_frame = watchpoint_frame;
10791 w->watchpoint_thread = inferior_ptid;
10795 w->watchpoint_frame = null_frame_id;
10796 w->watchpoint_thread = null_ptid;
10799 if (scope_breakpoint != NULL)
10801 /* The scope breakpoint is related to the watchpoint. We will
10802 need to act on them together. */
10803 w->related_breakpoint = scope_breakpoint;
10804 scope_breakpoint->related_breakpoint = w.get ();
10807 if (!just_location)
10808 value_free_to_mark (mark);
10810 /* Finally update the new watchpoint. This creates the locations
10811 that should be inserted. */
10812 update_watchpoint (w.get (), 1);
10814 install_breakpoint (internal, std::move (w), 1);
10817 /* Return count of debug registers needed to watch the given expression.
10818 If the watchpoint cannot be handled in hardware return zero. */
10821 can_use_hardware_watchpoint (const std::vector<value_ref_ptr> &vals)
10823 int found_memory_cnt = 0;
10825 /* Did the user specifically forbid us to use hardware watchpoints? */
10826 if (!can_use_hw_watchpoints)
10829 gdb_assert (!vals.empty ());
10830 struct value *head = vals[0].get ();
10832 /* Make sure that the value of the expression depends only upon
10833 memory contents, and values computed from them within GDB. If we
10834 find any register references or function calls, we can't use a
10835 hardware watchpoint.
10837 The idea here is that evaluating an expression generates a series
10838 of values, one holding the value of every subexpression. (The
10839 expression a*b+c has five subexpressions: a, b, a*b, c, and
10840 a*b+c.) GDB's values hold almost enough information to establish
10841 the criteria given above --- they identify memory lvalues,
10842 register lvalues, computed values, etcetera. So we can evaluate
10843 the expression, and then scan the chain of values that leaves
10844 behind to decide whether we can detect any possible change to the
10845 expression's final value using only hardware watchpoints.
10847 However, I don't think that the values returned by inferior
10848 function calls are special in any way. So this function may not
10849 notice that an expression involving an inferior function call
10850 can't be watched with hardware watchpoints. FIXME. */
10851 for (const value_ref_ptr &iter : vals)
10853 struct value *v = iter.get ();
10855 if (VALUE_LVAL (v) == lval_memory)
10857 if (v != head && value_lazy (v))
10858 /* A lazy memory lvalue in the chain is one that GDB never
10859 needed to fetch; we either just used its address (e.g.,
10860 `a' in `a.b') or we never needed it at all (e.g., `a'
10861 in `a,b'). This doesn't apply to HEAD; if that is
10862 lazy then it was not readable, but watch it anyway. */
10866 /* Ahh, memory we actually used! Check if we can cover
10867 it with hardware watchpoints. */
10868 struct type *vtype = check_typedef (value_type (v));
10870 /* We only watch structs and arrays if user asked for it
10871 explicitly, never if they just happen to appear in a
10872 middle of some value chain. */
10874 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
10875 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
10877 CORE_ADDR vaddr = value_address (v);
10881 len = (target_exact_watchpoints
10882 && is_scalar_type_recursive (vtype))?
10883 1 : TYPE_LENGTH (value_type (v));
10885 num_regs = target_region_ok_for_hw_watchpoint (vaddr, len);
10889 found_memory_cnt += num_regs;
10893 else if (VALUE_LVAL (v) != not_lval
10894 && deprecated_value_modifiable (v) == 0)
10895 return 0; /* These are values from the history (e.g., $1). */
10896 else if (VALUE_LVAL (v) == lval_register)
10897 return 0; /* Cannot watch a register with a HW watchpoint. */
10900 /* The expression itself looks suitable for using a hardware
10901 watchpoint, but give the target machine a chance to reject it. */
10902 return found_memory_cnt;
10906 watch_command_wrapper (const char *arg, int from_tty, int internal)
10908 watch_command_1 (arg, hw_write, from_tty, 0, internal);
10911 /* A helper function that looks for the "-location" argument and then
10912 calls watch_command_1. */
10915 watch_maybe_just_location (const char *arg, int accessflag, int from_tty)
10917 int just_location = 0;
10920 && (check_for_argument (&arg, "-location", sizeof ("-location") - 1)
10921 || check_for_argument (&arg, "-l", sizeof ("-l") - 1)))
10923 arg = skip_spaces (arg);
10927 watch_command_1 (arg, accessflag, from_tty, just_location, 0);
10931 watch_command (const char *arg, int from_tty)
10933 watch_maybe_just_location (arg, hw_write, from_tty);
10937 rwatch_command_wrapper (const char *arg, int from_tty, int internal)
10939 watch_command_1 (arg, hw_read, from_tty, 0, internal);
10943 rwatch_command (const char *arg, int from_tty)
10945 watch_maybe_just_location (arg, hw_read, from_tty);
10949 awatch_command_wrapper (const char *arg, int from_tty, int internal)
10951 watch_command_1 (arg, hw_access, from_tty, 0, internal);
10955 awatch_command (const char *arg, int from_tty)
10957 watch_maybe_just_location (arg, hw_access, from_tty);
10961 /* Data for the FSM that manages the until(location)/advance commands
10962 in infcmd.c. Here because it uses the mechanisms of
10965 struct until_break_fsm
10967 /* The base class. */
10968 struct thread_fsm thread_fsm;
10970 /* The thread that as current when the command was executed. */
10973 /* The breakpoint set at the destination location. */
10974 struct breakpoint *location_breakpoint;
10976 /* Breakpoint set at the return address in the caller frame. May be
10978 struct breakpoint *caller_breakpoint;
10981 static void until_break_fsm_clean_up (struct thread_fsm *self,
10982 struct thread_info *thread);
10983 static int until_break_fsm_should_stop (struct thread_fsm *self,
10984 struct thread_info *thread);
10985 static enum async_reply_reason
10986 until_break_fsm_async_reply_reason (struct thread_fsm *self);
10988 /* until_break_fsm's vtable. */
10990 static struct thread_fsm_ops until_break_fsm_ops =
10993 until_break_fsm_clean_up,
10994 until_break_fsm_should_stop,
10995 NULL, /* return_value */
10996 until_break_fsm_async_reply_reason,
10999 /* Allocate a new until_break_command_fsm. */
11001 static struct until_break_fsm *
11002 new_until_break_fsm (struct interp *cmd_interp, int thread,
11003 breakpoint_up &&location_breakpoint,
11004 breakpoint_up &&caller_breakpoint)
11006 struct until_break_fsm *sm;
11008 sm = XCNEW (struct until_break_fsm);
11009 thread_fsm_ctor (&sm->thread_fsm, &until_break_fsm_ops, cmd_interp);
11011 sm->thread = thread;
11012 sm->location_breakpoint = location_breakpoint.release ();
11013 sm->caller_breakpoint = caller_breakpoint.release ();
11018 /* Implementation of the 'should_stop' FSM method for the
11019 until(location)/advance commands. */
11022 until_break_fsm_should_stop (struct thread_fsm *self,
11023 struct thread_info *tp)
11025 struct until_break_fsm *sm = (struct until_break_fsm *) self;
11027 if (bpstat_find_breakpoint (tp->control.stop_bpstat,
11028 sm->location_breakpoint) != NULL
11029 || (sm->caller_breakpoint != NULL
11030 && bpstat_find_breakpoint (tp->control.stop_bpstat,
11031 sm->caller_breakpoint) != NULL))
11032 thread_fsm_set_finished (self);
11037 /* Implementation of the 'clean_up' FSM method for the
11038 until(location)/advance commands. */
11041 until_break_fsm_clean_up (struct thread_fsm *self,
11042 struct thread_info *thread)
11044 struct until_break_fsm *sm = (struct until_break_fsm *) self;
11046 /* Clean up our temporary breakpoints. */
11047 if (sm->location_breakpoint != NULL)
11049 delete_breakpoint (sm->location_breakpoint);
11050 sm->location_breakpoint = NULL;
11052 if (sm->caller_breakpoint != NULL)
11054 delete_breakpoint (sm->caller_breakpoint);
11055 sm->caller_breakpoint = NULL;
11057 delete_longjmp_breakpoint (sm->thread);
11060 /* Implementation of the 'async_reply_reason' FSM method for the
11061 until(location)/advance commands. */
11063 static enum async_reply_reason
11064 until_break_fsm_async_reply_reason (struct thread_fsm *self)
11066 return EXEC_ASYNC_LOCATION_REACHED;
11070 until_break_command (const char *arg, int from_tty, int anywhere)
11072 struct frame_info *frame;
11073 struct gdbarch *frame_gdbarch;
11074 struct frame_id stack_frame_id;
11075 struct frame_id caller_frame_id;
11076 struct cleanup *old_chain;
11078 struct thread_info *tp;
11079 struct until_break_fsm *sm;
11081 clear_proceed_status (0);
11083 /* Set a breakpoint where the user wants it and at return from
11086 event_location_up location = string_to_event_location (&arg, current_language);
11088 std::vector<symtab_and_line> sals
11089 = (last_displayed_sal_is_valid ()
11090 ? decode_line_1 (location.get (), DECODE_LINE_FUNFIRSTLINE, NULL,
11091 get_last_displayed_symtab (),
11092 get_last_displayed_line ())
11093 : decode_line_1 (location.get (), DECODE_LINE_FUNFIRSTLINE,
11094 NULL, (struct symtab *) NULL, 0));
11096 if (sals.size () != 1)
11097 error (_("Couldn't get information on specified line."));
11099 symtab_and_line &sal = sals[0];
11102 error (_("Junk at end of arguments."));
11104 resolve_sal_pc (&sal);
11106 tp = inferior_thread ();
11107 thread = tp->global_num;
11109 old_chain = make_cleanup (null_cleanup, NULL);
11111 /* Note linespec handling above invalidates the frame chain.
11112 Installing a breakpoint also invalidates the frame chain (as it
11113 may need to switch threads), so do any frame handling before
11116 frame = get_selected_frame (NULL);
11117 frame_gdbarch = get_frame_arch (frame);
11118 stack_frame_id = get_stack_frame_id (frame);
11119 caller_frame_id = frame_unwind_caller_id (frame);
11121 /* Keep within the current frame, or in frames called by the current
11124 breakpoint_up caller_breakpoint;
11125 if (frame_id_p (caller_frame_id))
11127 struct symtab_and_line sal2;
11128 struct gdbarch *caller_gdbarch;
11130 sal2 = find_pc_line (frame_unwind_caller_pc (frame), 0);
11131 sal2.pc = frame_unwind_caller_pc (frame);
11132 caller_gdbarch = frame_unwind_caller_arch (frame);
11133 caller_breakpoint = set_momentary_breakpoint (caller_gdbarch,
11138 set_longjmp_breakpoint (tp, caller_frame_id);
11139 make_cleanup (delete_longjmp_breakpoint_cleanup, &thread);
11142 /* set_momentary_breakpoint could invalidate FRAME. */
11145 breakpoint_up location_breakpoint;
11147 /* If the user told us to continue until a specified location,
11148 we don't specify a frame at which we need to stop. */
11149 location_breakpoint = set_momentary_breakpoint (frame_gdbarch, sal,
11150 null_frame_id, bp_until);
11152 /* Otherwise, specify the selected frame, because we want to stop
11153 only at the very same frame. */
11154 location_breakpoint = set_momentary_breakpoint (frame_gdbarch, sal,
11155 stack_frame_id, bp_until);
11157 sm = new_until_break_fsm (command_interp (), tp->global_num,
11158 std::move (location_breakpoint),
11159 std::move (caller_breakpoint));
11160 tp->thread_fsm = &sm->thread_fsm;
11162 discard_cleanups (old_chain);
11164 proceed (-1, GDB_SIGNAL_DEFAULT);
11167 /* This function attempts to parse an optional "if <cond>" clause
11168 from the arg string. If one is not found, it returns NULL.
11170 Else, it returns a pointer to the condition string. (It does not
11171 attempt to evaluate the string against a particular block.) And,
11172 it updates arg to point to the first character following the parsed
11173 if clause in the arg string. */
11176 ep_parse_optional_if_clause (const char **arg)
11178 const char *cond_string;
11180 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
11183 /* Skip the "if" keyword. */
11186 /* Skip any extra leading whitespace, and record the start of the
11187 condition string. */
11188 *arg = skip_spaces (*arg);
11189 cond_string = *arg;
11191 /* Assume that the condition occupies the remainder of the arg
11193 (*arg) += strlen (cond_string);
11195 return cond_string;
11198 /* Commands to deal with catching events, such as signals, exceptions,
11199 process start/exit, etc. */
11203 catch_fork_temporary, catch_vfork_temporary,
11204 catch_fork_permanent, catch_vfork_permanent
11209 catch_fork_command_1 (const char *arg, int from_tty,
11210 struct cmd_list_element *command)
11212 struct gdbarch *gdbarch = get_current_arch ();
11213 const char *cond_string = NULL;
11214 catch_fork_kind fork_kind;
11217 fork_kind = (catch_fork_kind) (uintptr_t) get_cmd_context (command);
11218 tempflag = (fork_kind == catch_fork_temporary
11219 || fork_kind == catch_vfork_temporary);
11223 arg = skip_spaces (arg);
11225 /* The allowed syntax is:
11227 catch [v]fork if <cond>
11229 First, check if there's an if clause. */
11230 cond_string = ep_parse_optional_if_clause (&arg);
11232 if ((*arg != '\0') && !isspace (*arg))
11233 error (_("Junk at end of arguments."));
11235 /* If this target supports it, create a fork or vfork catchpoint
11236 and enable reporting of such events. */
11239 case catch_fork_temporary:
11240 case catch_fork_permanent:
11241 create_fork_vfork_event_catchpoint (gdbarch, tempflag, cond_string,
11242 &catch_fork_breakpoint_ops);
11244 case catch_vfork_temporary:
11245 case catch_vfork_permanent:
11246 create_fork_vfork_event_catchpoint (gdbarch, tempflag, cond_string,
11247 &catch_vfork_breakpoint_ops);
11250 error (_("unsupported or unknown fork kind; cannot catch it"));
11256 catch_exec_command_1 (const char *arg, int from_tty,
11257 struct cmd_list_element *command)
11259 struct gdbarch *gdbarch = get_current_arch ();
11261 const char *cond_string = NULL;
11263 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
11267 arg = skip_spaces (arg);
11269 /* The allowed syntax is:
11271 catch exec if <cond>
11273 First, check if there's an if clause. */
11274 cond_string = ep_parse_optional_if_clause (&arg);
11276 if ((*arg != '\0') && !isspace (*arg))
11277 error (_("Junk at end of arguments."));
11279 std::unique_ptr<exec_catchpoint> c (new exec_catchpoint ());
11280 init_catchpoint (c.get (), gdbarch, tempflag, cond_string,
11281 &catch_exec_breakpoint_ops);
11282 c->exec_pathname = NULL;
11284 install_breakpoint (0, std::move (c), 1);
11288 init_ada_exception_breakpoint (struct breakpoint *b,
11289 struct gdbarch *gdbarch,
11290 struct symtab_and_line sal,
11291 const char *addr_string,
11292 const struct breakpoint_ops *ops,
11299 struct gdbarch *loc_gdbarch = get_sal_arch (sal);
11301 loc_gdbarch = gdbarch;
11303 describe_other_breakpoints (loc_gdbarch,
11304 sal.pspace, sal.pc, sal.section, -1);
11305 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
11306 version for exception catchpoints, because two catchpoints
11307 used for different exception names will use the same address.
11308 In this case, a "breakpoint ... also set at..." warning is
11309 unproductive. Besides, the warning phrasing is also a bit
11310 inappropriate, we should use the word catchpoint, and tell
11311 the user what type of catchpoint it is. The above is good
11312 enough for now, though. */
11315 init_raw_breakpoint (b, gdbarch, sal, bp_breakpoint, ops);
11317 b->enable_state = enabled ? bp_enabled : bp_disabled;
11318 b->disposition = tempflag ? disp_del : disp_donttouch;
11319 b->location = string_to_event_location (&addr_string,
11320 language_def (language_ada));
11321 b->language = language_ada;
11325 catch_command (const char *arg, int from_tty)
11327 error (_("Catch requires an event name."));
11332 tcatch_command (const char *arg, int from_tty)
11334 error (_("Catch requires an event name."));
11337 /* Compare two breakpoints and return a strcmp-like result. */
11340 compare_breakpoints (const breakpoint *a, const breakpoint *b)
11342 uintptr_t ua = (uintptr_t) a;
11343 uintptr_t ub = (uintptr_t) b;
11345 if (a->number < b->number)
11347 else if (a->number > b->number)
11350 /* Now sort by address, in case we see, e..g, two breakpoints with
11354 return ua > ub ? 1 : 0;
11357 /* Delete breakpoints by address or line. */
11360 clear_command (const char *arg, int from_tty)
11362 struct breakpoint *b;
11365 std::vector<symtab_and_line> decoded_sals;
11366 symtab_and_line last_sal;
11367 gdb::array_view<symtab_and_line> sals;
11371 = decode_line_with_current_source (arg,
11372 (DECODE_LINE_FUNFIRSTLINE
11373 | DECODE_LINE_LIST_MODE));
11375 sals = decoded_sals;
11379 /* Set sal's line, symtab, pc, and pspace to the values
11380 corresponding to the last call to print_frame_info. If the
11381 codepoint is not valid, this will set all the fields to 0. */
11382 last_sal = get_last_displayed_sal ();
11383 if (last_sal.symtab == 0)
11384 error (_("No source file specified."));
11390 /* We don't call resolve_sal_pc here. That's not as bad as it
11391 seems, because all existing breakpoints typically have both
11392 file/line and pc set. So, if clear is given file/line, we can
11393 match this to existing breakpoint without obtaining pc at all.
11395 We only support clearing given the address explicitly
11396 present in breakpoint table. Say, we've set breakpoint
11397 at file:line. There were several PC values for that file:line,
11398 due to optimization, all in one block.
11400 We've picked one PC value. If "clear" is issued with another
11401 PC corresponding to the same file:line, the breakpoint won't
11402 be cleared. We probably can still clear the breakpoint, but
11403 since the other PC value is never presented to user, user
11404 can only find it by guessing, and it does not seem important
11405 to support that. */
11407 /* For each line spec given, delete bps which correspond to it. Do
11408 it in two passes, solely to preserve the current behavior that
11409 from_tty is forced true if we delete more than one
11412 std::vector<struct breakpoint *> found;
11413 for (const auto &sal : sals)
11415 const char *sal_fullname;
11417 /* If exact pc given, clear bpts at that pc.
11418 If line given (pc == 0), clear all bpts on specified line.
11419 If defaulting, clear all bpts on default line
11422 defaulting sal.pc != 0 tests to do
11427 1 0 <can't happen> */
11429 sal_fullname = (sal.symtab == NULL
11430 ? NULL : symtab_to_fullname (sal.symtab));
11432 /* Find all matching breakpoints and add them to 'found'. */
11433 ALL_BREAKPOINTS (b)
11436 /* Are we going to delete b? */
11437 if (b->type != bp_none && !is_watchpoint (b))
11439 struct bp_location *loc = b->loc;
11440 for (; loc; loc = loc->next)
11442 /* If the user specified file:line, don't allow a PC
11443 match. This matches historical gdb behavior. */
11444 int pc_match = (!sal.explicit_line
11446 && (loc->pspace == sal.pspace)
11447 && (loc->address == sal.pc)
11448 && (!section_is_overlay (loc->section)
11449 || loc->section == sal.section));
11450 int line_match = 0;
11452 if ((default_match || sal.explicit_line)
11453 && loc->symtab != NULL
11454 && sal_fullname != NULL
11455 && sal.pspace == loc->pspace
11456 && loc->line_number == sal.line
11457 && filename_cmp (symtab_to_fullname (loc->symtab),
11458 sal_fullname) == 0)
11461 if (pc_match || line_match)
11470 found.push_back (b);
11474 /* Now go thru the 'found' chain and delete them. */
11475 if (found.empty ())
11478 error (_("No breakpoint at %s."), arg);
11480 error (_("No breakpoint at this line."));
11483 /* Remove duplicates from the vec. */
11484 std::sort (found.begin (), found.end (),
11485 [] (const breakpoint *bp_a, const breakpoint *bp_b)
11487 return compare_breakpoints (bp_a, bp_b) < 0;
11489 found.erase (std::unique (found.begin (), found.end (),
11490 [] (const breakpoint *bp_a, const breakpoint *bp_b)
11492 return compare_breakpoints (bp_a, bp_b) == 0;
11496 if (found.size () > 1)
11497 from_tty = 1; /* Always report if deleted more than one. */
11500 if (found.size () == 1)
11501 printf_unfiltered (_("Deleted breakpoint "));
11503 printf_unfiltered (_("Deleted breakpoints "));
11506 for (breakpoint *iter : found)
11509 printf_unfiltered ("%d ", iter->number);
11510 delete_breakpoint (iter);
11513 putchar_unfiltered ('\n');
11516 /* Delete breakpoint in BS if they are `delete' breakpoints and
11517 all breakpoints that are marked for deletion, whether hit or not.
11518 This is called after any breakpoint is hit, or after errors. */
11521 breakpoint_auto_delete (bpstat bs)
11523 struct breakpoint *b, *b_tmp;
11525 for (; bs; bs = bs->next)
11526 if (bs->breakpoint_at
11527 && bs->breakpoint_at->disposition == disp_del
11529 delete_breakpoint (bs->breakpoint_at);
11531 ALL_BREAKPOINTS_SAFE (b, b_tmp)
11533 if (b->disposition == disp_del_at_next_stop)
11534 delete_breakpoint (b);
11538 /* A comparison function for bp_location AP and BP being interfaced to
11539 qsort. Sort elements primarily by their ADDRESS (no matter what
11540 does breakpoint_address_is_meaningful say for its OWNER),
11541 secondarily by ordering first permanent elements and
11542 terciarily just ensuring the array is sorted stable way despite
11543 qsort being an unstable algorithm. */
11546 bp_locations_compare (const void *ap, const void *bp)
11548 const struct bp_location *a = *(const struct bp_location **) ap;
11549 const struct bp_location *b = *(const struct bp_location **) bp;
11551 if (a->address != b->address)
11552 return (a->address > b->address) - (a->address < b->address);
11554 /* Sort locations at the same address by their pspace number, keeping
11555 locations of the same inferior (in a multi-inferior environment)
11558 if (a->pspace->num != b->pspace->num)
11559 return ((a->pspace->num > b->pspace->num)
11560 - (a->pspace->num < b->pspace->num));
11562 /* Sort permanent breakpoints first. */
11563 if (a->permanent != b->permanent)
11564 return (a->permanent < b->permanent) - (a->permanent > b->permanent);
11566 /* Make the internal GDB representation stable across GDB runs
11567 where A and B memory inside GDB can differ. Breakpoint locations of
11568 the same type at the same address can be sorted in arbitrary order. */
11570 if (a->owner->number != b->owner->number)
11571 return ((a->owner->number > b->owner->number)
11572 - (a->owner->number < b->owner->number));
11574 return (a > b) - (a < b);
11577 /* Set bp_locations_placed_address_before_address_max and
11578 bp_locations_shadow_len_after_address_max according to the current
11579 content of the bp_locations array. */
11582 bp_locations_target_extensions_update (void)
11584 struct bp_location *bl, **blp_tmp;
11586 bp_locations_placed_address_before_address_max = 0;
11587 bp_locations_shadow_len_after_address_max = 0;
11589 ALL_BP_LOCATIONS (bl, blp_tmp)
11591 CORE_ADDR start, end, addr;
11593 if (!bp_location_has_shadow (bl))
11596 start = bl->target_info.placed_address;
11597 end = start + bl->target_info.shadow_len;
11599 gdb_assert (bl->address >= start);
11600 addr = bl->address - start;
11601 if (addr > bp_locations_placed_address_before_address_max)
11602 bp_locations_placed_address_before_address_max = addr;
11604 /* Zero SHADOW_LEN would not pass bp_location_has_shadow. */
11606 gdb_assert (bl->address < end);
11607 addr = end - bl->address;
11608 if (addr > bp_locations_shadow_len_after_address_max)
11609 bp_locations_shadow_len_after_address_max = addr;
11613 /* Download tracepoint locations if they haven't been. */
11616 download_tracepoint_locations (void)
11618 struct breakpoint *b;
11619 enum tribool can_download_tracepoint = TRIBOOL_UNKNOWN;
11621 scoped_restore_current_pspace_and_thread restore_pspace_thread;
11623 ALL_TRACEPOINTS (b)
11625 struct bp_location *bl;
11626 struct tracepoint *t;
11627 int bp_location_downloaded = 0;
11629 if ((b->type == bp_fast_tracepoint
11630 ? !may_insert_fast_tracepoints
11631 : !may_insert_tracepoints))
11634 if (can_download_tracepoint == TRIBOOL_UNKNOWN)
11636 if (target_can_download_tracepoint ())
11637 can_download_tracepoint = TRIBOOL_TRUE;
11639 can_download_tracepoint = TRIBOOL_FALSE;
11642 if (can_download_tracepoint == TRIBOOL_FALSE)
11645 for (bl = b->loc; bl; bl = bl->next)
11647 /* In tracepoint, locations are _never_ duplicated, so
11648 should_be_inserted is equivalent to
11649 unduplicated_should_be_inserted. */
11650 if (!should_be_inserted (bl) || bl->inserted)
11653 switch_to_program_space_and_thread (bl->pspace);
11655 target_download_tracepoint (bl);
11658 bp_location_downloaded = 1;
11660 t = (struct tracepoint *) b;
11661 t->number_on_target = b->number;
11662 if (bp_location_downloaded)
11663 gdb::observers::breakpoint_modified.notify (b);
11667 /* Swap the insertion/duplication state between two locations. */
11670 swap_insertion (struct bp_location *left, struct bp_location *right)
11672 const int left_inserted = left->inserted;
11673 const int left_duplicate = left->duplicate;
11674 const int left_needs_update = left->needs_update;
11675 const struct bp_target_info left_target_info = left->target_info;
11677 /* Locations of tracepoints can never be duplicated. */
11678 if (is_tracepoint (left->owner))
11679 gdb_assert (!left->duplicate);
11680 if (is_tracepoint (right->owner))
11681 gdb_assert (!right->duplicate);
11683 left->inserted = right->inserted;
11684 left->duplicate = right->duplicate;
11685 left->needs_update = right->needs_update;
11686 left->target_info = right->target_info;
11687 right->inserted = left_inserted;
11688 right->duplicate = left_duplicate;
11689 right->needs_update = left_needs_update;
11690 right->target_info = left_target_info;
11693 /* Force the re-insertion of the locations at ADDRESS. This is called
11694 once a new/deleted/modified duplicate location is found and we are evaluating
11695 conditions on the target's side. Such conditions need to be updated on
11699 force_breakpoint_reinsertion (struct bp_location *bl)
11701 struct bp_location **locp = NULL, **loc2p;
11702 struct bp_location *loc;
11703 CORE_ADDR address = 0;
11706 address = bl->address;
11707 pspace_num = bl->pspace->num;
11709 /* This is only meaningful if the target is
11710 evaluating conditions and if the user has
11711 opted for condition evaluation on the target's
11713 if (gdb_evaluates_breakpoint_condition_p ()
11714 || !target_supports_evaluation_of_breakpoint_conditions ())
11717 /* Flag all breakpoint locations with this address and
11718 the same program space as the location
11719 as "its condition has changed". We need to
11720 update the conditions on the target's side. */
11721 ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, address)
11725 if (!is_breakpoint (loc->owner)
11726 || pspace_num != loc->pspace->num)
11729 /* Flag the location appropriately. We use a different state to
11730 let everyone know that we already updated the set of locations
11731 with addr bl->address and program space bl->pspace. This is so
11732 we don't have to keep calling these functions just to mark locations
11733 that have already been marked. */
11734 loc->condition_changed = condition_updated;
11736 /* Free the agent expression bytecode as well. We will compute
11738 loc->cond_bytecode.reset ();
11741 /* Called whether new breakpoints are created, or existing breakpoints
11742 deleted, to update the global location list and recompute which
11743 locations are duplicate of which.
11745 The INSERT_MODE flag determines whether locations may not, may, or
11746 shall be inserted now. See 'enum ugll_insert_mode' for more
11750 update_global_location_list (enum ugll_insert_mode insert_mode)
11752 struct breakpoint *b;
11753 struct bp_location **locp, *loc;
11754 /* Last breakpoint location address that was marked for update. */
11755 CORE_ADDR last_addr = 0;
11756 /* Last breakpoint location program space that was marked for update. */
11757 int last_pspace_num = -1;
11759 /* Used in the duplicates detection below. When iterating over all
11760 bp_locations, points to the first bp_location of a given address.
11761 Breakpoints and watchpoints of different types are never
11762 duplicates of each other. Keep one pointer for each type of
11763 breakpoint/watchpoint, so we only need to loop over all locations
11765 struct bp_location *bp_loc_first; /* breakpoint */
11766 struct bp_location *wp_loc_first; /* hardware watchpoint */
11767 struct bp_location *awp_loc_first; /* access watchpoint */
11768 struct bp_location *rwp_loc_first; /* read watchpoint */
11770 /* Saved former bp_locations array which we compare against the newly
11771 built bp_locations from the current state of ALL_BREAKPOINTS. */
11772 struct bp_location **old_locp;
11773 unsigned old_locations_count;
11774 gdb::unique_xmalloc_ptr<struct bp_location *> old_locations (bp_locations);
11776 old_locations_count = bp_locations_count;
11777 bp_locations = NULL;
11778 bp_locations_count = 0;
11780 ALL_BREAKPOINTS (b)
11781 for (loc = b->loc; loc; loc = loc->next)
11782 bp_locations_count++;
11784 bp_locations = XNEWVEC (struct bp_location *, bp_locations_count);
11785 locp = bp_locations;
11786 ALL_BREAKPOINTS (b)
11787 for (loc = b->loc; loc; loc = loc->next)
11789 qsort (bp_locations, bp_locations_count, sizeof (*bp_locations),
11790 bp_locations_compare);
11792 bp_locations_target_extensions_update ();
11794 /* Identify bp_location instances that are no longer present in the
11795 new list, and therefore should be freed. Note that it's not
11796 necessary that those locations should be removed from inferior --
11797 if there's another location at the same address (previously
11798 marked as duplicate), we don't need to remove/insert the
11801 LOCP is kept in sync with OLD_LOCP, each pointing to the current
11802 and former bp_location array state respectively. */
11804 locp = bp_locations;
11805 for (old_locp = old_locations.get ();
11806 old_locp < old_locations.get () + old_locations_count;
11809 struct bp_location *old_loc = *old_locp;
11810 struct bp_location **loc2p;
11812 /* Tells if 'old_loc' is found among the new locations. If
11813 not, we have to free it. */
11814 int found_object = 0;
11815 /* Tells if the location should remain inserted in the target. */
11816 int keep_in_target = 0;
11819 /* Skip LOCP entries which will definitely never be needed.
11820 Stop either at or being the one matching OLD_LOC. */
11821 while (locp < bp_locations + bp_locations_count
11822 && (*locp)->address < old_loc->address)
11826 (loc2p < bp_locations + bp_locations_count
11827 && (*loc2p)->address == old_loc->address);
11830 /* Check if this is a new/duplicated location or a duplicated
11831 location that had its condition modified. If so, we want to send
11832 its condition to the target if evaluation of conditions is taking
11834 if ((*loc2p)->condition_changed == condition_modified
11835 && (last_addr != old_loc->address
11836 || last_pspace_num != old_loc->pspace->num))
11838 force_breakpoint_reinsertion (*loc2p);
11839 last_pspace_num = old_loc->pspace->num;
11842 if (*loc2p == old_loc)
11846 /* We have already handled this address, update it so that we don't
11847 have to go through updates again. */
11848 last_addr = old_loc->address;
11850 /* Target-side condition evaluation: Handle deleted locations. */
11852 force_breakpoint_reinsertion (old_loc);
11854 /* If this location is no longer present, and inserted, look if
11855 there's maybe a new location at the same address. If so,
11856 mark that one inserted, and don't remove this one. This is
11857 needed so that we don't have a time window where a breakpoint
11858 at certain location is not inserted. */
11860 if (old_loc->inserted)
11862 /* If the location is inserted now, we might have to remove
11865 if (found_object && should_be_inserted (old_loc))
11867 /* The location is still present in the location list,
11868 and still should be inserted. Don't do anything. */
11869 keep_in_target = 1;
11873 /* This location still exists, but it won't be kept in the
11874 target since it may have been disabled. We proceed to
11875 remove its target-side condition. */
11877 /* The location is either no longer present, or got
11878 disabled. See if there's another location at the
11879 same address, in which case we don't need to remove
11880 this one from the target. */
11882 /* OLD_LOC comes from existing struct breakpoint. */
11883 if (breakpoint_address_is_meaningful (old_loc->owner))
11886 (loc2p < bp_locations + bp_locations_count
11887 && (*loc2p)->address == old_loc->address);
11890 struct bp_location *loc2 = *loc2p;
11892 if (breakpoint_locations_match (loc2, old_loc))
11894 /* Read watchpoint locations are switched to
11895 access watchpoints, if the former are not
11896 supported, but the latter are. */
11897 if (is_hardware_watchpoint (old_loc->owner))
11899 gdb_assert (is_hardware_watchpoint (loc2->owner));
11900 loc2->watchpoint_type = old_loc->watchpoint_type;
11903 /* loc2 is a duplicated location. We need to check
11904 if it should be inserted in case it will be
11906 if (loc2 != old_loc
11907 && unduplicated_should_be_inserted (loc2))
11909 swap_insertion (old_loc, loc2);
11910 keep_in_target = 1;
11918 if (!keep_in_target)
11920 if (remove_breakpoint (old_loc))
11922 /* This is just about all we can do. We could keep
11923 this location on the global list, and try to
11924 remove it next time, but there's no particular
11925 reason why we will succeed next time.
11927 Note that at this point, old_loc->owner is still
11928 valid, as delete_breakpoint frees the breakpoint
11929 only after calling us. */
11930 printf_filtered (_("warning: Error removing "
11931 "breakpoint %d\n"),
11932 old_loc->owner->number);
11940 if (removed && target_is_non_stop_p ()
11941 && need_moribund_for_location_type (old_loc))
11943 /* This location was removed from the target. In
11944 non-stop mode, a race condition is possible where
11945 we've removed a breakpoint, but stop events for that
11946 breakpoint are already queued and will arrive later.
11947 We apply an heuristic to be able to distinguish such
11948 SIGTRAPs from other random SIGTRAPs: we keep this
11949 breakpoint location for a bit, and will retire it
11950 after we see some number of events. The theory here
11951 is that reporting of events should, "on the average",
11952 be fair, so after a while we'll see events from all
11953 threads that have anything of interest, and no longer
11954 need to keep this breakpoint location around. We
11955 don't hold locations forever so to reduce chances of
11956 mistaking a non-breakpoint SIGTRAP for a breakpoint
11959 The heuristic failing can be disastrous on
11960 decr_pc_after_break targets.
11962 On decr_pc_after_break targets, like e.g., x86-linux,
11963 if we fail to recognize a late breakpoint SIGTRAP,
11964 because events_till_retirement has reached 0 too
11965 soon, we'll fail to do the PC adjustment, and report
11966 a random SIGTRAP to the user. When the user resumes
11967 the inferior, it will most likely immediately crash
11968 with SIGILL/SIGBUS/SIGSEGV, or worse, get silently
11969 corrupted, because of being resumed e.g., in the
11970 middle of a multi-byte instruction, or skipped a
11971 one-byte instruction. This was actually seen happen
11972 on native x86-linux, and should be less rare on
11973 targets that do not support new thread events, like
11974 remote, due to the heuristic depending on
11977 Mistaking a random SIGTRAP for a breakpoint trap
11978 causes similar symptoms (PC adjustment applied when
11979 it shouldn't), but then again, playing with SIGTRAPs
11980 behind the debugger's back is asking for trouble.
11982 Since hardware watchpoint traps are always
11983 distinguishable from other traps, so we don't need to
11984 apply keep hardware watchpoint moribund locations
11985 around. We simply always ignore hardware watchpoint
11986 traps we can no longer explain. */
11988 old_loc->events_till_retirement = 3 * (thread_count () + 1);
11989 old_loc->owner = NULL;
11991 moribund_locations.push_back (old_loc);
11995 old_loc->owner = NULL;
11996 decref_bp_location (&old_loc);
12001 /* Rescan breakpoints at the same address and section, marking the
12002 first one as "first" and any others as "duplicates". This is so
12003 that the bpt instruction is only inserted once. If we have a
12004 permanent breakpoint at the same place as BPT, make that one the
12005 official one, and the rest as duplicates. Permanent breakpoints
12006 are sorted first for the same address.
12008 Do the same for hardware watchpoints, but also considering the
12009 watchpoint's type (regular/access/read) and length. */
12011 bp_loc_first = NULL;
12012 wp_loc_first = NULL;
12013 awp_loc_first = NULL;
12014 rwp_loc_first = NULL;
12015 ALL_BP_LOCATIONS (loc, locp)
12017 /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always
12019 struct bp_location **loc_first_p;
12022 if (!unduplicated_should_be_inserted (loc)
12023 || !breakpoint_address_is_meaningful (b)
12024 /* Don't detect duplicate for tracepoint locations because they are
12025 never duplicated. See the comments in field `duplicate' of
12026 `struct bp_location'. */
12027 || is_tracepoint (b))
12029 /* Clear the condition modification flag. */
12030 loc->condition_changed = condition_unchanged;
12034 if (b->type == bp_hardware_watchpoint)
12035 loc_first_p = &wp_loc_first;
12036 else if (b->type == bp_read_watchpoint)
12037 loc_first_p = &rwp_loc_first;
12038 else if (b->type == bp_access_watchpoint)
12039 loc_first_p = &awp_loc_first;
12041 loc_first_p = &bp_loc_first;
12043 if (*loc_first_p == NULL
12044 || (overlay_debugging && loc->section != (*loc_first_p)->section)
12045 || !breakpoint_locations_match (loc, *loc_first_p))
12047 *loc_first_p = loc;
12048 loc->duplicate = 0;
12050 if (is_breakpoint (loc->owner) && loc->condition_changed)
12052 loc->needs_update = 1;
12053 /* Clear the condition modification flag. */
12054 loc->condition_changed = condition_unchanged;
12060 /* This and the above ensure the invariant that the first location
12061 is not duplicated, and is the inserted one.
12062 All following are marked as duplicated, and are not inserted. */
12064 swap_insertion (loc, *loc_first_p);
12065 loc->duplicate = 1;
12067 /* Clear the condition modification flag. */
12068 loc->condition_changed = condition_unchanged;
12071 if (insert_mode == UGLL_INSERT || breakpoints_should_be_inserted_now ())
12073 if (insert_mode != UGLL_DONT_INSERT)
12074 insert_breakpoint_locations ();
12077 /* Even though the caller told us to not insert new
12078 locations, we may still need to update conditions on the
12079 target's side of breakpoints that were already inserted
12080 if the target is evaluating breakpoint conditions. We
12081 only update conditions for locations that are marked
12083 update_inserted_breakpoint_locations ();
12087 if (insert_mode != UGLL_DONT_INSERT)
12088 download_tracepoint_locations ();
12092 breakpoint_retire_moribund (void)
12094 for (int ix = 0; ix < moribund_locations.size (); ++ix)
12096 struct bp_location *loc = moribund_locations[ix];
12097 if (--(loc->events_till_retirement) == 0)
12099 decref_bp_location (&loc);
12100 unordered_remove (moribund_locations, ix);
12107 update_global_location_list_nothrow (enum ugll_insert_mode insert_mode)
12112 update_global_location_list (insert_mode);
12114 CATCH (e, RETURN_MASK_ERROR)
12120 /* Clear BKP from a BPS. */
12123 bpstat_remove_bp_location (bpstat bps, struct breakpoint *bpt)
12127 for (bs = bps; bs; bs = bs->next)
12128 if (bs->breakpoint_at == bpt)
12130 bs->breakpoint_at = NULL;
12131 bs->old_val = NULL;
12132 /* bs->commands will be freed later. */
12136 /* Callback for iterate_over_threads. */
12138 bpstat_remove_breakpoint_callback (struct thread_info *th, void *data)
12140 struct breakpoint *bpt = (struct breakpoint *) data;
12142 bpstat_remove_bp_location (th->control.stop_bpstat, bpt);
12146 /* Helper for breakpoint and tracepoint breakpoint_ops->mention
12150 say_where (struct breakpoint *b)
12152 struct value_print_options opts;
12154 get_user_print_options (&opts);
12156 /* i18n: cagney/2005-02-11: Below needs to be merged into a
12158 if (b->loc == NULL)
12160 /* For pending locations, the output differs slightly based
12161 on b->extra_string. If this is non-NULL, it contains either
12162 a condition or dprintf arguments. */
12163 if (b->extra_string == NULL)
12165 printf_filtered (_(" (%s) pending."),
12166 event_location_to_string (b->location.get ()));
12168 else if (b->type == bp_dprintf)
12170 printf_filtered (_(" (%s,%s) pending."),
12171 event_location_to_string (b->location.get ()),
12176 printf_filtered (_(" (%s %s) pending."),
12177 event_location_to_string (b->location.get ()),
12183 if (opts.addressprint || b->loc->symtab == NULL)
12185 printf_filtered (" at ");
12186 fputs_filtered (paddress (b->loc->gdbarch, b->loc->address),
12189 if (b->loc->symtab != NULL)
12191 /* If there is a single location, we can print the location
12193 if (b->loc->next == NULL)
12195 puts_filtered (": file ");
12196 fputs_styled (symtab_to_filename_for_display (b->loc->symtab),
12197 file_name_style.style (),
12199 printf_filtered (", line %d.",
12200 b->loc->line_number);
12203 /* This is not ideal, but each location may have a
12204 different file name, and this at least reflects the
12205 real situation somewhat. */
12206 printf_filtered (": %s.",
12207 event_location_to_string (b->location.get ()));
12212 struct bp_location *loc = b->loc;
12214 for (; loc; loc = loc->next)
12216 printf_filtered (" (%d locations)", n);
12221 /* Default bp_location_ops methods. */
12224 bp_location_dtor (struct bp_location *self)
12226 xfree (self->function_name);
12229 static const struct bp_location_ops bp_location_ops =
12234 /* Destructor for the breakpoint base class. */
12236 breakpoint::~breakpoint ()
12238 xfree (this->cond_string);
12239 xfree (this->extra_string);
12240 xfree (this->filter);
12243 static struct bp_location *
12244 base_breakpoint_allocate_location (struct breakpoint *self)
12246 return new bp_location (&bp_location_ops, self);
12250 base_breakpoint_re_set (struct breakpoint *b)
12252 /* Nothing to re-set. */
12255 #define internal_error_pure_virtual_called() \
12256 gdb_assert_not_reached ("pure virtual function called")
12259 base_breakpoint_insert_location (struct bp_location *bl)
12261 internal_error_pure_virtual_called ();
12265 base_breakpoint_remove_location (struct bp_location *bl,
12266 enum remove_bp_reason reason)
12268 internal_error_pure_virtual_called ();
12272 base_breakpoint_breakpoint_hit (const struct bp_location *bl,
12273 const address_space *aspace,
12275 const struct target_waitstatus *ws)
12277 internal_error_pure_virtual_called ();
12281 base_breakpoint_check_status (bpstat bs)
12286 /* A "works_in_software_mode" breakpoint_ops method that just internal
12290 base_breakpoint_works_in_software_mode (const struct breakpoint *b)
12292 internal_error_pure_virtual_called ();
12295 /* A "resources_needed" breakpoint_ops method that just internal
12299 base_breakpoint_resources_needed (const struct bp_location *bl)
12301 internal_error_pure_virtual_called ();
12304 static enum print_stop_action
12305 base_breakpoint_print_it (bpstat bs)
12307 internal_error_pure_virtual_called ();
12311 base_breakpoint_print_one_detail (const struct breakpoint *self,
12312 struct ui_out *uiout)
12318 base_breakpoint_print_mention (struct breakpoint *b)
12320 internal_error_pure_virtual_called ();
12324 base_breakpoint_print_recreate (struct breakpoint *b, struct ui_file *fp)
12326 internal_error_pure_virtual_called ();
12330 base_breakpoint_create_sals_from_location
12331 (const struct event_location *location,
12332 struct linespec_result *canonical,
12333 enum bptype type_wanted)
12335 internal_error_pure_virtual_called ();
12339 base_breakpoint_create_breakpoints_sal (struct gdbarch *gdbarch,
12340 struct linespec_result *c,
12341 gdb::unique_xmalloc_ptr<char> cond_string,
12342 gdb::unique_xmalloc_ptr<char> extra_string,
12343 enum bptype type_wanted,
12344 enum bpdisp disposition,
12346 int task, int ignore_count,
12347 const struct breakpoint_ops *o,
12348 int from_tty, int enabled,
12349 int internal, unsigned flags)
12351 internal_error_pure_virtual_called ();
12354 static std::vector<symtab_and_line>
12355 base_breakpoint_decode_location (struct breakpoint *b,
12356 const struct event_location *location,
12357 struct program_space *search_pspace)
12359 internal_error_pure_virtual_called ();
12362 /* The default 'explains_signal' method. */
12365 base_breakpoint_explains_signal (struct breakpoint *b, enum gdb_signal sig)
12370 /* The default "after_condition_true" method. */
12373 base_breakpoint_after_condition_true (struct bpstats *bs)
12375 /* Nothing to do. */
12378 struct breakpoint_ops base_breakpoint_ops =
12380 base_breakpoint_allocate_location,
12381 base_breakpoint_re_set,
12382 base_breakpoint_insert_location,
12383 base_breakpoint_remove_location,
12384 base_breakpoint_breakpoint_hit,
12385 base_breakpoint_check_status,
12386 base_breakpoint_resources_needed,
12387 base_breakpoint_works_in_software_mode,
12388 base_breakpoint_print_it,
12390 base_breakpoint_print_one_detail,
12391 base_breakpoint_print_mention,
12392 base_breakpoint_print_recreate,
12393 base_breakpoint_create_sals_from_location,
12394 base_breakpoint_create_breakpoints_sal,
12395 base_breakpoint_decode_location,
12396 base_breakpoint_explains_signal,
12397 base_breakpoint_after_condition_true,
12400 /* Default breakpoint_ops methods. */
12403 bkpt_re_set (struct breakpoint *b)
12405 /* FIXME: is this still reachable? */
12406 if (breakpoint_event_location_empty_p (b))
12408 /* Anything without a location can't be re-set. */
12409 delete_breakpoint (b);
12413 breakpoint_re_set_default (b);
12417 bkpt_insert_location (struct bp_location *bl)
12419 CORE_ADDR addr = bl->target_info.reqstd_address;
12421 bl->target_info.kind = breakpoint_kind (bl, &addr);
12422 bl->target_info.placed_address = addr;
12424 if (bl->loc_type == bp_loc_hardware_breakpoint)
12425 return target_insert_hw_breakpoint (bl->gdbarch, &bl->target_info);
12427 return target_insert_breakpoint (bl->gdbarch, &bl->target_info);
12431 bkpt_remove_location (struct bp_location *bl, enum remove_bp_reason reason)
12433 if (bl->loc_type == bp_loc_hardware_breakpoint)
12434 return target_remove_hw_breakpoint (bl->gdbarch, &bl->target_info);
12436 return target_remove_breakpoint (bl->gdbarch, &bl->target_info, reason);
12440 bkpt_breakpoint_hit (const struct bp_location *bl,
12441 const address_space *aspace, CORE_ADDR bp_addr,
12442 const struct target_waitstatus *ws)
12444 if (ws->kind != TARGET_WAITKIND_STOPPED
12445 || ws->value.sig != GDB_SIGNAL_TRAP)
12448 if (!breakpoint_address_match (bl->pspace->aspace, bl->address,
12452 if (overlay_debugging /* unmapped overlay section */
12453 && section_is_overlay (bl->section)
12454 && !section_is_mapped (bl->section))
12461 dprintf_breakpoint_hit (const struct bp_location *bl,
12462 const address_space *aspace, CORE_ADDR bp_addr,
12463 const struct target_waitstatus *ws)
12465 if (dprintf_style == dprintf_style_agent
12466 && target_can_run_breakpoint_commands ())
12468 /* An agent-style dprintf never causes a stop. If we see a trap
12469 for this address it must be for a breakpoint that happens to
12470 be set at the same address. */
12474 return bkpt_breakpoint_hit (bl, aspace, bp_addr, ws);
12478 bkpt_resources_needed (const struct bp_location *bl)
12480 gdb_assert (bl->owner->type == bp_hardware_breakpoint);
12485 static enum print_stop_action
12486 bkpt_print_it (bpstat bs)
12488 struct breakpoint *b;
12489 const struct bp_location *bl;
12491 struct ui_out *uiout = current_uiout;
12493 gdb_assert (bs->bp_location_at != NULL);
12495 bl = bs->bp_location_at;
12496 b = bs->breakpoint_at;
12498 bp_temp = b->disposition == disp_del;
12499 if (bl->address != bl->requested_address)
12500 breakpoint_adjustment_warning (bl->requested_address,
12503 annotate_breakpoint (b->number);
12504 maybe_print_thread_hit_breakpoint (uiout);
12507 uiout->text ("Temporary breakpoint ");
12509 uiout->text ("Breakpoint ");
12510 if (uiout->is_mi_like_p ())
12512 uiout->field_string ("reason",
12513 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
12514 uiout->field_string ("disp", bpdisp_text (b->disposition));
12516 uiout->field_int ("bkptno", b->number);
12517 uiout->text (", ");
12519 return PRINT_SRC_AND_LOC;
12523 bkpt_print_mention (struct breakpoint *b)
12525 if (current_uiout->is_mi_like_p ())
12530 case bp_breakpoint:
12531 case bp_gnu_ifunc_resolver:
12532 if (b->disposition == disp_del)
12533 printf_filtered (_("Temporary breakpoint"));
12535 printf_filtered (_("Breakpoint"));
12536 printf_filtered (_(" %d"), b->number);
12537 if (b->type == bp_gnu_ifunc_resolver)
12538 printf_filtered (_(" at gnu-indirect-function resolver"));
12540 case bp_hardware_breakpoint:
12541 printf_filtered (_("Hardware assisted breakpoint %d"), b->number);
12544 printf_filtered (_("Dprintf %d"), b->number);
12552 bkpt_print_recreate (struct breakpoint *tp, struct ui_file *fp)
12554 if (tp->type == bp_breakpoint && tp->disposition == disp_del)
12555 fprintf_unfiltered (fp, "tbreak");
12556 else if (tp->type == bp_breakpoint)
12557 fprintf_unfiltered (fp, "break");
12558 else if (tp->type == bp_hardware_breakpoint
12559 && tp->disposition == disp_del)
12560 fprintf_unfiltered (fp, "thbreak");
12561 else if (tp->type == bp_hardware_breakpoint)
12562 fprintf_unfiltered (fp, "hbreak");
12564 internal_error (__FILE__, __LINE__,
12565 _("unhandled breakpoint type %d"), (int) tp->type);
12567 fprintf_unfiltered (fp, " %s",
12568 event_location_to_string (tp->location.get ()));
12570 /* Print out extra_string if this breakpoint is pending. It might
12571 contain, for example, conditions that were set by the user. */
12572 if (tp->loc == NULL && tp->extra_string != NULL)
12573 fprintf_unfiltered (fp, " %s", tp->extra_string);
12575 print_recreate_thread (tp, fp);
12579 bkpt_create_sals_from_location (const struct event_location *location,
12580 struct linespec_result *canonical,
12581 enum bptype type_wanted)
12583 create_sals_from_location_default (location, canonical, type_wanted);
12587 bkpt_create_breakpoints_sal (struct gdbarch *gdbarch,
12588 struct linespec_result *canonical,
12589 gdb::unique_xmalloc_ptr<char> cond_string,
12590 gdb::unique_xmalloc_ptr<char> extra_string,
12591 enum bptype type_wanted,
12592 enum bpdisp disposition,
12594 int task, int ignore_count,
12595 const struct breakpoint_ops *ops,
12596 int from_tty, int enabled,
12597 int internal, unsigned flags)
12599 create_breakpoints_sal_default (gdbarch, canonical,
12600 std::move (cond_string),
12601 std::move (extra_string),
12603 disposition, thread, task,
12604 ignore_count, ops, from_tty,
12605 enabled, internal, flags);
12608 static std::vector<symtab_and_line>
12609 bkpt_decode_location (struct breakpoint *b,
12610 const struct event_location *location,
12611 struct program_space *search_pspace)
12613 return decode_location_default (b, location, search_pspace);
12616 /* Virtual table for internal breakpoints. */
12619 internal_bkpt_re_set (struct breakpoint *b)
12623 /* Delete overlay event and longjmp master breakpoints; they
12624 will be reset later by breakpoint_re_set. */
12625 case bp_overlay_event:
12626 case bp_longjmp_master:
12627 case bp_std_terminate_master:
12628 case bp_exception_master:
12629 delete_breakpoint (b);
12632 /* This breakpoint is special, it's set up when the inferior
12633 starts and we really don't want to touch it. */
12634 case bp_shlib_event:
12636 /* Like bp_shlib_event, this breakpoint type is special. Once
12637 it is set up, we do not want to touch it. */
12638 case bp_thread_event:
12644 internal_bkpt_check_status (bpstat bs)
12646 if (bs->breakpoint_at->type == bp_shlib_event)
12648 /* If requested, stop when the dynamic linker notifies GDB of
12649 events. This allows the user to get control and place
12650 breakpoints in initializer routines for dynamically loaded
12651 objects (among other things). */
12652 bs->stop = stop_on_solib_events;
12653 bs->print = stop_on_solib_events;
12659 static enum print_stop_action
12660 internal_bkpt_print_it (bpstat bs)
12662 struct breakpoint *b;
12664 b = bs->breakpoint_at;
12668 case bp_shlib_event:
12669 /* Did we stop because the user set the stop_on_solib_events
12670 variable? (If so, we report this as a generic, "Stopped due
12671 to shlib event" message.) */
12672 print_solib_event (0);
12675 case bp_thread_event:
12676 /* Not sure how we will get here.
12677 GDB should not stop for these breakpoints. */
12678 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
12681 case bp_overlay_event:
12682 /* By analogy with the thread event, GDB should not stop for these. */
12683 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
12686 case bp_longjmp_master:
12687 /* These should never be enabled. */
12688 printf_filtered (_("Longjmp Master Breakpoint: gdb should not stop!\n"));
12691 case bp_std_terminate_master:
12692 /* These should never be enabled. */
12693 printf_filtered (_("std::terminate Master Breakpoint: "
12694 "gdb should not stop!\n"));
12697 case bp_exception_master:
12698 /* These should never be enabled. */
12699 printf_filtered (_("Exception Master Breakpoint: "
12700 "gdb should not stop!\n"));
12704 return PRINT_NOTHING;
12708 internal_bkpt_print_mention (struct breakpoint *b)
12710 /* Nothing to mention. These breakpoints are internal. */
12713 /* Virtual table for momentary breakpoints */
12716 momentary_bkpt_re_set (struct breakpoint *b)
12718 /* Keep temporary breakpoints, which can be encountered when we step
12719 over a dlopen call and solib_add is resetting the breakpoints.
12720 Otherwise these should have been blown away via the cleanup chain
12721 or by breakpoint_init_inferior when we rerun the executable. */
12725 momentary_bkpt_check_status (bpstat bs)
12727 /* Nothing. The point of these breakpoints is causing a stop. */
12730 static enum print_stop_action
12731 momentary_bkpt_print_it (bpstat bs)
12733 return PRINT_UNKNOWN;
12737 momentary_bkpt_print_mention (struct breakpoint *b)
12739 /* Nothing to mention. These breakpoints are internal. */
12742 /* Ensure INITIATING_FRAME is cleared when no such breakpoint exists.
12744 It gets cleared already on the removal of the first one of such placed
12745 breakpoints. This is OK as they get all removed altogether. */
12747 longjmp_breakpoint::~longjmp_breakpoint ()
12749 thread_info *tp = find_thread_global_id (this->thread);
12752 tp->initiating_frame = null_frame_id;
12755 /* Specific methods for probe breakpoints. */
12758 bkpt_probe_insert_location (struct bp_location *bl)
12760 int v = bkpt_insert_location (bl);
12764 /* The insertion was successful, now let's set the probe's semaphore
12766 bl->probe.prob->set_semaphore (bl->probe.objfile, bl->gdbarch);
12773 bkpt_probe_remove_location (struct bp_location *bl,
12774 enum remove_bp_reason reason)
12776 /* Let's clear the semaphore before removing the location. */
12777 bl->probe.prob->clear_semaphore (bl->probe.objfile, bl->gdbarch);
12779 return bkpt_remove_location (bl, reason);
12783 bkpt_probe_create_sals_from_location (const struct event_location *location,
12784 struct linespec_result *canonical,
12785 enum bptype type_wanted)
12787 struct linespec_sals lsal;
12789 lsal.sals = parse_probes (location, NULL, canonical);
12791 = xstrdup (event_location_to_string (canonical->location.get ()));
12792 canonical->lsals.push_back (std::move (lsal));
12795 static std::vector<symtab_and_line>
12796 bkpt_probe_decode_location (struct breakpoint *b,
12797 const struct event_location *location,
12798 struct program_space *search_pspace)
12800 std::vector<symtab_and_line> sals = parse_probes (location, search_pspace, NULL);
12802 error (_("probe not found"));
12806 /* The breakpoint_ops structure to be used in tracepoints. */
12809 tracepoint_re_set (struct breakpoint *b)
12811 breakpoint_re_set_default (b);
12815 tracepoint_breakpoint_hit (const struct bp_location *bl,
12816 const address_space *aspace, CORE_ADDR bp_addr,
12817 const struct target_waitstatus *ws)
12819 /* By definition, the inferior does not report stops at
12825 tracepoint_print_one_detail (const struct breakpoint *self,
12826 struct ui_out *uiout)
12828 struct tracepoint *tp = (struct tracepoint *) self;
12829 if (!tp->static_trace_marker_id.empty ())
12831 gdb_assert (self->type == bp_static_tracepoint);
12833 uiout->text ("\tmarker id is ");
12834 uiout->field_string ("static-tracepoint-marker-string-id",
12835 tp->static_trace_marker_id);
12836 uiout->text ("\n");
12841 tracepoint_print_mention (struct breakpoint *b)
12843 if (current_uiout->is_mi_like_p ())
12848 case bp_tracepoint:
12849 printf_filtered (_("Tracepoint"));
12850 printf_filtered (_(" %d"), b->number);
12852 case bp_fast_tracepoint:
12853 printf_filtered (_("Fast tracepoint"));
12854 printf_filtered (_(" %d"), b->number);
12856 case bp_static_tracepoint:
12857 printf_filtered (_("Static tracepoint"));
12858 printf_filtered (_(" %d"), b->number);
12861 internal_error (__FILE__, __LINE__,
12862 _("unhandled tracepoint type %d"), (int) b->type);
12869 tracepoint_print_recreate (struct breakpoint *self, struct ui_file *fp)
12871 struct tracepoint *tp = (struct tracepoint *) self;
12873 if (self->type == bp_fast_tracepoint)
12874 fprintf_unfiltered (fp, "ftrace");
12875 else if (self->type == bp_static_tracepoint)
12876 fprintf_unfiltered (fp, "strace");
12877 else if (self->type == bp_tracepoint)
12878 fprintf_unfiltered (fp, "trace");
12880 internal_error (__FILE__, __LINE__,
12881 _("unhandled tracepoint type %d"), (int) self->type);
12883 fprintf_unfiltered (fp, " %s",
12884 event_location_to_string (self->location.get ()));
12885 print_recreate_thread (self, fp);
12887 if (tp->pass_count)
12888 fprintf_unfiltered (fp, " passcount %d\n", tp->pass_count);
12892 tracepoint_create_sals_from_location (const struct event_location *location,
12893 struct linespec_result *canonical,
12894 enum bptype type_wanted)
12896 create_sals_from_location_default (location, canonical, type_wanted);
12900 tracepoint_create_breakpoints_sal (struct gdbarch *gdbarch,
12901 struct linespec_result *canonical,
12902 gdb::unique_xmalloc_ptr<char> cond_string,
12903 gdb::unique_xmalloc_ptr<char> extra_string,
12904 enum bptype type_wanted,
12905 enum bpdisp disposition,
12907 int task, int ignore_count,
12908 const struct breakpoint_ops *ops,
12909 int from_tty, int enabled,
12910 int internal, unsigned flags)
12912 create_breakpoints_sal_default (gdbarch, canonical,
12913 std::move (cond_string),
12914 std::move (extra_string),
12916 disposition, thread, task,
12917 ignore_count, ops, from_tty,
12918 enabled, internal, flags);
12921 static std::vector<symtab_and_line>
12922 tracepoint_decode_location (struct breakpoint *b,
12923 const struct event_location *location,
12924 struct program_space *search_pspace)
12926 return decode_location_default (b, location, search_pspace);
12929 struct breakpoint_ops tracepoint_breakpoint_ops;
12931 /* The breakpoint_ops structure to be use on tracepoints placed in a
12935 tracepoint_probe_create_sals_from_location
12936 (const struct event_location *location,
12937 struct linespec_result *canonical,
12938 enum bptype type_wanted)
12940 /* We use the same method for breakpoint on probes. */
12941 bkpt_probe_create_sals_from_location (location, canonical, type_wanted);
12944 static std::vector<symtab_and_line>
12945 tracepoint_probe_decode_location (struct breakpoint *b,
12946 const struct event_location *location,
12947 struct program_space *search_pspace)
12949 /* We use the same method for breakpoint on probes. */
12950 return bkpt_probe_decode_location (b, location, search_pspace);
12953 static struct breakpoint_ops tracepoint_probe_breakpoint_ops;
12955 /* Dprintf breakpoint_ops methods. */
12958 dprintf_re_set (struct breakpoint *b)
12960 breakpoint_re_set_default (b);
12962 /* extra_string should never be non-NULL for dprintf. */
12963 gdb_assert (b->extra_string != NULL);
12965 /* 1 - connect to target 1, that can run breakpoint commands.
12966 2 - create a dprintf, which resolves fine.
12967 3 - disconnect from target 1
12968 4 - connect to target 2, that can NOT run breakpoint commands.
12970 After steps #3/#4, you'll want the dprintf command list to
12971 be updated, because target 1 and 2 may well return different
12972 answers for target_can_run_breakpoint_commands().
12973 Given absence of finer grained resetting, we get to do
12974 it all the time. */
12975 if (b->extra_string != NULL)
12976 update_dprintf_command_list (b);
12979 /* Implement the "print_recreate" breakpoint_ops method for dprintf. */
12982 dprintf_print_recreate (struct breakpoint *tp, struct ui_file *fp)
12984 fprintf_unfiltered (fp, "dprintf %s,%s",
12985 event_location_to_string (tp->location.get ()),
12987 print_recreate_thread (tp, fp);
12990 /* Implement the "after_condition_true" breakpoint_ops method for
12993 dprintf's are implemented with regular commands in their command
12994 list, but we run the commands here instead of before presenting the
12995 stop to the user, as dprintf's don't actually cause a stop. This
12996 also makes it so that the commands of multiple dprintfs at the same
12997 address are all handled. */
13000 dprintf_after_condition_true (struct bpstats *bs)
13002 struct bpstats tmp_bs;
13003 struct bpstats *tmp_bs_p = &tmp_bs;
13005 /* dprintf's never cause a stop. This wasn't set in the
13006 check_status hook instead because that would make the dprintf's
13007 condition not be evaluated. */
13010 /* Run the command list here. Take ownership of it instead of
13011 copying. We never want these commands to run later in
13012 bpstat_do_actions, if a breakpoint that causes a stop happens to
13013 be set at same address as this dprintf, or even if running the
13014 commands here throws. */
13015 tmp_bs.commands = bs->commands;
13016 bs->commands = NULL;
13018 bpstat_do_actions_1 (&tmp_bs_p);
13020 /* 'tmp_bs.commands' will usually be NULL by now, but
13021 bpstat_do_actions_1 may return early without processing the whole
13025 /* The breakpoint_ops structure to be used on static tracepoints with
13029 strace_marker_create_sals_from_location (const struct event_location *location,
13030 struct linespec_result *canonical,
13031 enum bptype type_wanted)
13033 struct linespec_sals lsal;
13034 const char *arg_start, *arg;
13036 arg = arg_start = get_linespec_location (location)->spec_string;
13037 lsal.sals = decode_static_tracepoint_spec (&arg);
13039 std::string str (arg_start, arg - arg_start);
13040 const char *ptr = str.c_str ();
13041 canonical->location
13042 = new_linespec_location (&ptr, symbol_name_match_type::FULL);
13045 = xstrdup (event_location_to_string (canonical->location.get ()));
13046 canonical->lsals.push_back (std::move (lsal));
13050 strace_marker_create_breakpoints_sal (struct gdbarch *gdbarch,
13051 struct linespec_result *canonical,
13052 gdb::unique_xmalloc_ptr<char> cond_string,
13053 gdb::unique_xmalloc_ptr<char> extra_string,
13054 enum bptype type_wanted,
13055 enum bpdisp disposition,
13057 int task, int ignore_count,
13058 const struct breakpoint_ops *ops,
13059 int from_tty, int enabled,
13060 int internal, unsigned flags)
13062 const linespec_sals &lsal = canonical->lsals[0];
13064 /* If the user is creating a static tracepoint by marker id
13065 (strace -m MARKER_ID), then store the sals index, so that
13066 breakpoint_re_set can try to match up which of the newly
13067 found markers corresponds to this one, and, don't try to
13068 expand multiple locations for each sal, given than SALS
13069 already should contain all sals for MARKER_ID. */
13071 for (size_t i = 0; i < lsal.sals.size (); i++)
13073 event_location_up location
13074 = copy_event_location (canonical->location.get ());
13076 std::unique_ptr<tracepoint> tp (new tracepoint ());
13077 init_breakpoint_sal (tp.get (), gdbarch, lsal.sals[i],
13078 std::move (location), NULL,
13079 std::move (cond_string),
13080 std::move (extra_string),
13081 type_wanted, disposition,
13082 thread, task, ignore_count, ops,
13083 from_tty, enabled, internal, flags,
13084 canonical->special_display);
13085 /* Given that its possible to have multiple markers with
13086 the same string id, if the user is creating a static
13087 tracepoint by marker id ("strace -m MARKER_ID"), then
13088 store the sals index, so that breakpoint_re_set can
13089 try to match up which of the newly found markers
13090 corresponds to this one */
13091 tp->static_trace_marker_id_idx = i;
13093 install_breakpoint (internal, std::move (tp), 0);
13097 static std::vector<symtab_and_line>
13098 strace_marker_decode_location (struct breakpoint *b,
13099 const struct event_location *location,
13100 struct program_space *search_pspace)
13102 struct tracepoint *tp = (struct tracepoint *) b;
13103 const char *s = get_linespec_location (location)->spec_string;
13105 std::vector<symtab_and_line> sals = decode_static_tracepoint_spec (&s);
13106 if (sals.size () > tp->static_trace_marker_id_idx)
13108 sals[0] = sals[tp->static_trace_marker_id_idx];
13113 error (_("marker %s not found"), tp->static_trace_marker_id.c_str ());
13116 static struct breakpoint_ops strace_marker_breakpoint_ops;
13119 strace_marker_p (struct breakpoint *b)
13121 return b->ops == &strace_marker_breakpoint_ops;
13124 /* Delete a breakpoint and clean up all traces of it in the data
13128 delete_breakpoint (struct breakpoint *bpt)
13130 struct breakpoint *b;
13132 gdb_assert (bpt != NULL);
13134 /* Has this bp already been deleted? This can happen because
13135 multiple lists can hold pointers to bp's. bpstat lists are
13138 One example of this happening is a watchpoint's scope bp. When
13139 the scope bp triggers, we notice that the watchpoint is out of
13140 scope, and delete it. We also delete its scope bp. But the
13141 scope bp is marked "auto-deleting", and is already on a bpstat.
13142 That bpstat is then checked for auto-deleting bp's, which are
13145 A real solution to this problem might involve reference counts in
13146 bp's, and/or giving them pointers back to their referencing
13147 bpstat's, and teaching delete_breakpoint to only free a bp's
13148 storage when no more references were extent. A cheaper bandaid
13150 if (bpt->type == bp_none)
13153 /* At least avoid this stale reference until the reference counting
13154 of breakpoints gets resolved. */
13155 if (bpt->related_breakpoint != bpt)
13157 struct breakpoint *related;
13158 struct watchpoint *w;
13160 if (bpt->type == bp_watchpoint_scope)
13161 w = (struct watchpoint *) bpt->related_breakpoint;
13162 else if (bpt->related_breakpoint->type == bp_watchpoint_scope)
13163 w = (struct watchpoint *) bpt;
13167 watchpoint_del_at_next_stop (w);
13169 /* Unlink bpt from the bpt->related_breakpoint ring. */
13170 for (related = bpt; related->related_breakpoint != bpt;
13171 related = related->related_breakpoint);
13172 related->related_breakpoint = bpt->related_breakpoint;
13173 bpt->related_breakpoint = bpt;
13176 /* watch_command_1 creates a watchpoint but only sets its number if
13177 update_watchpoint succeeds in creating its bp_locations. If there's
13178 a problem in that process, we'll be asked to delete the half-created
13179 watchpoint. In that case, don't announce the deletion. */
13181 gdb::observers::breakpoint_deleted.notify (bpt);
13183 if (breakpoint_chain == bpt)
13184 breakpoint_chain = bpt->next;
13186 ALL_BREAKPOINTS (b)
13187 if (b->next == bpt)
13189 b->next = bpt->next;
13193 /* Be sure no bpstat's are pointing at the breakpoint after it's
13195 /* FIXME, how can we find all bpstat's? We just check stop_bpstat
13196 in all threads for now. Note that we cannot just remove bpstats
13197 pointing at bpt from the stop_bpstat list entirely, as breakpoint
13198 commands are associated with the bpstat; if we remove it here,
13199 then the later call to bpstat_do_actions (&stop_bpstat); in
13200 event-top.c won't do anything, and temporary breakpoints with
13201 commands won't work. */
13203 iterate_over_threads (bpstat_remove_breakpoint_callback, bpt);
13205 /* Now that breakpoint is removed from breakpoint list, update the
13206 global location list. This will remove locations that used to
13207 belong to this breakpoint. Do this before freeing the breakpoint
13208 itself, since remove_breakpoint looks at location's owner. It
13209 might be better design to have location completely
13210 self-contained, but it's not the case now. */
13211 update_global_location_list (UGLL_DONT_INSERT);
13213 /* On the chance that someone will soon try again to delete this
13214 same bp, we mark it as deleted before freeing its storage. */
13215 bpt->type = bp_none;
13219 /* Iterator function to call a user-provided callback function once
13220 for each of B and its related breakpoints. */
13223 iterate_over_related_breakpoints (struct breakpoint *b,
13224 gdb::function_view<void (breakpoint *)> function)
13226 struct breakpoint *related;
13231 struct breakpoint *next;
13233 /* FUNCTION may delete RELATED. */
13234 next = related->related_breakpoint;
13236 if (next == related)
13238 /* RELATED is the last ring entry. */
13239 function (related);
13241 /* FUNCTION may have deleted it, so we'd never reach back to
13242 B. There's nothing left to do anyway, so just break
13247 function (related);
13251 while (related != b);
13255 delete_command (const char *arg, int from_tty)
13257 struct breakpoint *b, *b_tmp;
13263 int breaks_to_delete = 0;
13265 /* Delete all breakpoints if no argument. Do not delete
13266 internal breakpoints, these have to be deleted with an
13267 explicit breakpoint number argument. */
13268 ALL_BREAKPOINTS (b)
13269 if (user_breakpoint_p (b))
13271 breaks_to_delete = 1;
13275 /* Ask user only if there are some breakpoints to delete. */
13277 || (breaks_to_delete && query (_("Delete all breakpoints? "))))
13279 ALL_BREAKPOINTS_SAFE (b, b_tmp)
13280 if (user_breakpoint_p (b))
13281 delete_breakpoint (b);
13285 map_breakpoint_numbers
13286 (arg, [&] (breakpoint *br)
13288 iterate_over_related_breakpoints (br, delete_breakpoint);
13292 /* Return true if all locations of B bound to PSPACE are pending. If
13293 PSPACE is NULL, all locations of all program spaces are
13297 all_locations_are_pending (struct breakpoint *b, struct program_space *pspace)
13299 struct bp_location *loc;
13301 for (loc = b->loc; loc != NULL; loc = loc->next)
13302 if ((pspace == NULL
13303 || loc->pspace == pspace)
13304 && !loc->shlib_disabled
13305 && !loc->pspace->executing_startup)
13310 /* Subroutine of update_breakpoint_locations to simplify it.
13311 Return non-zero if multiple fns in list LOC have the same name.
13312 Null names are ignored. */
13315 ambiguous_names_p (struct bp_location *loc)
13317 struct bp_location *l;
13318 htab_t htab = htab_create_alloc (13, htab_hash_string, streq_hash, NULL,
13321 for (l = loc; l != NULL; l = l->next)
13324 const char *name = l->function_name;
13326 /* Allow for some names to be NULL, ignore them. */
13330 slot = (const char **) htab_find_slot (htab, (const void *) name,
13332 /* NOTE: We can assume slot != NULL here because xcalloc never
13336 htab_delete (htab);
13342 htab_delete (htab);
13346 /* When symbols change, it probably means the sources changed as well,
13347 and it might mean the static tracepoint markers are no longer at
13348 the same address or line numbers they used to be at last we
13349 checked. Losing your static tracepoints whenever you rebuild is
13350 undesirable. This function tries to resync/rematch gdb static
13351 tracepoints with the markers on the target, for static tracepoints
13352 that have not been set by marker id. Static tracepoint that have
13353 been set by marker id are reset by marker id in breakpoint_re_set.
13356 1) For a tracepoint set at a specific address, look for a marker at
13357 the old PC. If one is found there, assume to be the same marker.
13358 If the name / string id of the marker found is different from the
13359 previous known name, assume that means the user renamed the marker
13360 in the sources, and output a warning.
13362 2) For a tracepoint set at a given line number, look for a marker
13363 at the new address of the old line number. If one is found there,
13364 assume to be the same marker. If the name / string id of the
13365 marker found is different from the previous known name, assume that
13366 means the user renamed the marker in the sources, and output a
13369 3) If a marker is no longer found at the same address or line, it
13370 may mean the marker no longer exists. But it may also just mean
13371 the code changed a bit. Maybe the user added a few lines of code
13372 that made the marker move up or down (in line number terms). Ask
13373 the target for info about the marker with the string id as we knew
13374 it. If found, update line number and address in the matching
13375 static tracepoint. This will get confused if there's more than one
13376 marker with the same ID (possible in UST, although unadvised
13377 precisely because it confuses tools). */
13379 static struct symtab_and_line
13380 update_static_tracepoint (struct breakpoint *b, struct symtab_and_line sal)
13382 struct tracepoint *tp = (struct tracepoint *) b;
13383 struct static_tracepoint_marker marker;
13388 find_line_pc (sal.symtab, sal.line, &pc);
13390 if (target_static_tracepoint_marker_at (pc, &marker))
13392 if (tp->static_trace_marker_id != marker.str_id)
13393 warning (_("static tracepoint %d changed probed marker from %s to %s"),
13394 b->number, tp->static_trace_marker_id.c_str (),
13395 marker.str_id.c_str ());
13397 tp->static_trace_marker_id = std::move (marker.str_id);
13402 /* Old marker wasn't found on target at lineno. Try looking it up
13404 if (!sal.explicit_pc
13406 && sal.symtab != NULL
13407 && !tp->static_trace_marker_id.empty ())
13409 std::vector<static_tracepoint_marker> markers
13410 = target_static_tracepoint_markers_by_strid
13411 (tp->static_trace_marker_id.c_str ());
13413 if (!markers.empty ())
13415 struct symbol *sym;
13416 struct static_tracepoint_marker *tpmarker;
13417 struct ui_out *uiout = current_uiout;
13418 struct explicit_location explicit_loc;
13420 tpmarker = &markers[0];
13422 tp->static_trace_marker_id = std::move (tpmarker->str_id);
13424 warning (_("marker for static tracepoint %d (%s) not "
13425 "found at previous line number"),
13426 b->number, tp->static_trace_marker_id.c_str ());
13428 symtab_and_line sal2 = find_pc_line (tpmarker->address, 0);
13429 sym = find_pc_sect_function (tpmarker->address, NULL);
13430 uiout->text ("Now in ");
13433 uiout->field_string ("func", SYMBOL_PRINT_NAME (sym),
13434 ui_out_style_kind::FUNCTION);
13435 uiout->text (" at ");
13437 uiout->field_string ("file",
13438 symtab_to_filename_for_display (sal2.symtab),
13439 ui_out_style_kind::FILE);
13442 if (uiout->is_mi_like_p ())
13444 const char *fullname = symtab_to_fullname (sal2.symtab);
13446 uiout->field_string ("fullname", fullname);
13449 uiout->field_int ("line", sal2.line);
13450 uiout->text ("\n");
13452 b->loc->line_number = sal2.line;
13453 b->loc->symtab = sym != NULL ? sal2.symtab : NULL;
13455 b->location.reset (NULL);
13456 initialize_explicit_location (&explicit_loc);
13457 explicit_loc.source_filename
13458 = ASTRDUP (symtab_to_filename_for_display (sal2.symtab));
13459 explicit_loc.line_offset.offset = b->loc->line_number;
13460 explicit_loc.line_offset.sign = LINE_OFFSET_NONE;
13461 b->location = new_explicit_location (&explicit_loc);
13463 /* Might be nice to check if function changed, and warn if
13470 /* Returns 1 iff locations A and B are sufficiently same that
13471 we don't need to report breakpoint as changed. */
13474 locations_are_equal (struct bp_location *a, struct bp_location *b)
13478 if (a->address != b->address)
13481 if (a->shlib_disabled != b->shlib_disabled)
13484 if (a->enabled != b->enabled)
13491 if ((a == NULL) != (b == NULL))
13497 /* Split all locations of B that are bound to PSPACE out of B's
13498 location list to a separate list and return that list's head. If
13499 PSPACE is NULL, hoist out all locations of B. */
13501 static struct bp_location *
13502 hoist_existing_locations (struct breakpoint *b, struct program_space *pspace)
13504 struct bp_location head;
13505 struct bp_location *i = b->loc;
13506 struct bp_location **i_link = &b->loc;
13507 struct bp_location *hoisted = &head;
13509 if (pspace == NULL)
13520 if (i->pspace == pspace)
13535 /* Create new breakpoint locations for B (a hardware or software
13536 breakpoint) based on SALS and SALS_END. If SALS_END.NELTS is not
13537 zero, then B is a ranged breakpoint. Only recreates locations for
13538 FILTER_PSPACE. Locations of other program spaces are left
13542 update_breakpoint_locations (struct breakpoint *b,
13543 struct program_space *filter_pspace,
13544 gdb::array_view<const symtab_and_line> sals,
13545 gdb::array_view<const symtab_and_line> sals_end)
13547 struct bp_location *existing_locations;
13549 if (!sals_end.empty () && (sals.size () != 1 || sals_end.size () != 1))
13551 /* Ranged breakpoints have only one start location and one end
13553 b->enable_state = bp_disabled;
13554 printf_unfiltered (_("Could not reset ranged breakpoint %d: "
13555 "multiple locations found\n"),
13560 /* If there's no new locations, and all existing locations are
13561 pending, don't do anything. This optimizes the common case where
13562 all locations are in the same shared library, that was unloaded.
13563 We'd like to retain the location, so that when the library is
13564 loaded again, we don't loose the enabled/disabled status of the
13565 individual locations. */
13566 if (all_locations_are_pending (b, filter_pspace) && sals.empty ())
13569 existing_locations = hoist_existing_locations (b, filter_pspace);
13571 for (const auto &sal : sals)
13573 struct bp_location *new_loc;
13575 switch_to_program_space_and_thread (sal.pspace);
13577 new_loc = add_location_to_breakpoint (b, &sal);
13579 /* Reparse conditions, they might contain references to the
13581 if (b->cond_string != NULL)
13585 s = b->cond_string;
13588 new_loc->cond = parse_exp_1 (&s, sal.pc,
13589 block_for_pc (sal.pc),
13592 CATCH (e, RETURN_MASK_ERROR)
13594 warning (_("failed to reevaluate condition "
13595 "for breakpoint %d: %s"),
13596 b->number, e.message);
13597 new_loc->enabled = 0;
13602 if (!sals_end.empty ())
13604 CORE_ADDR end = find_breakpoint_range_end (sals_end[0]);
13606 new_loc->length = end - sals[0].pc + 1;
13610 /* If possible, carry over 'disable' status from existing
13613 struct bp_location *e = existing_locations;
13614 /* If there are multiple breakpoints with the same function name,
13615 e.g. for inline functions, comparing function names won't work.
13616 Instead compare pc addresses; this is just a heuristic as things
13617 may have moved, but in practice it gives the correct answer
13618 often enough until a better solution is found. */
13619 int have_ambiguous_names = ambiguous_names_p (b->loc);
13621 for (; e; e = e->next)
13623 if (!e->enabled && e->function_name)
13625 struct bp_location *l = b->loc;
13626 if (have_ambiguous_names)
13628 for (; l; l = l->next)
13629 if (breakpoint_locations_match (e, l))
13637 for (; l; l = l->next)
13638 if (l->function_name
13639 && strcmp (e->function_name, l->function_name) == 0)
13649 if (!locations_are_equal (existing_locations, b->loc))
13650 gdb::observers::breakpoint_modified.notify (b);
13653 /* Find the SaL locations corresponding to the given LOCATION.
13654 On return, FOUND will be 1 if any SaL was found, zero otherwise. */
13656 static std::vector<symtab_and_line>
13657 location_to_sals (struct breakpoint *b, struct event_location *location,
13658 struct program_space *search_pspace, int *found)
13660 struct gdb_exception exception = exception_none;
13662 gdb_assert (b->ops != NULL);
13664 std::vector<symtab_and_line> sals;
13668 sals = b->ops->decode_location (b, location, search_pspace);
13670 CATCH (e, RETURN_MASK_ERROR)
13672 int not_found_and_ok = 0;
13676 /* For pending breakpoints, it's expected that parsing will
13677 fail until the right shared library is loaded. User has
13678 already told to create pending breakpoints and don't need
13679 extra messages. If breakpoint is in bp_shlib_disabled
13680 state, then user already saw the message about that
13681 breakpoint being disabled, and don't want to see more
13683 if (e.error == NOT_FOUND_ERROR
13684 && (b->condition_not_parsed
13686 && search_pspace != NULL
13687 && b->loc->pspace != search_pspace)
13688 || (b->loc && b->loc->shlib_disabled)
13689 || (b->loc && b->loc->pspace->executing_startup)
13690 || b->enable_state == bp_disabled))
13691 not_found_and_ok = 1;
13693 if (!not_found_and_ok)
13695 /* We surely don't want to warn about the same breakpoint
13696 10 times. One solution, implemented here, is disable
13697 the breakpoint on error. Another solution would be to
13698 have separate 'warning emitted' flag. Since this
13699 happens only when a binary has changed, I don't know
13700 which approach is better. */
13701 b->enable_state = bp_disabled;
13702 throw_exception (e);
13707 if (exception.reason == 0 || exception.error != NOT_FOUND_ERROR)
13709 for (auto &sal : sals)
13710 resolve_sal_pc (&sal);
13711 if (b->condition_not_parsed && b->extra_string != NULL)
13713 char *cond_string, *extra_string;
13716 find_condition_and_thread (b->extra_string, sals[0].pc,
13717 &cond_string, &thread, &task,
13719 gdb_assert (b->cond_string == NULL);
13721 b->cond_string = cond_string;
13722 b->thread = thread;
13726 xfree (b->extra_string);
13727 b->extra_string = extra_string;
13729 b->condition_not_parsed = 0;
13732 if (b->type == bp_static_tracepoint && !strace_marker_p (b))
13733 sals[0] = update_static_tracepoint (b, sals[0]);
13743 /* The default re_set method, for typical hardware or software
13744 breakpoints. Reevaluate the breakpoint and recreate its
13748 breakpoint_re_set_default (struct breakpoint *b)
13750 struct program_space *filter_pspace = current_program_space;
13751 std::vector<symtab_and_line> expanded, expanded_end;
13754 std::vector<symtab_and_line> sals = location_to_sals (b, b->location.get (),
13755 filter_pspace, &found);
13757 expanded = std::move (sals);
13759 if (b->location_range_end != NULL)
13761 std::vector<symtab_and_line> sals_end
13762 = location_to_sals (b, b->location_range_end.get (),
13763 filter_pspace, &found);
13765 expanded_end = std::move (sals_end);
13768 update_breakpoint_locations (b, filter_pspace, expanded, expanded_end);
13771 /* Default method for creating SALs from an address string. It basically
13772 calls parse_breakpoint_sals. Return 1 for success, zero for failure. */
13775 create_sals_from_location_default (const struct event_location *location,
13776 struct linespec_result *canonical,
13777 enum bptype type_wanted)
13779 parse_breakpoint_sals (location, canonical);
13782 /* Call create_breakpoints_sal for the given arguments. This is the default
13783 function for the `create_breakpoints_sal' method of
13787 create_breakpoints_sal_default (struct gdbarch *gdbarch,
13788 struct linespec_result *canonical,
13789 gdb::unique_xmalloc_ptr<char> cond_string,
13790 gdb::unique_xmalloc_ptr<char> extra_string,
13791 enum bptype type_wanted,
13792 enum bpdisp disposition,
13794 int task, int ignore_count,
13795 const struct breakpoint_ops *ops,
13796 int from_tty, int enabled,
13797 int internal, unsigned flags)
13799 create_breakpoints_sal (gdbarch, canonical,
13800 std::move (cond_string),
13801 std::move (extra_string),
13802 type_wanted, disposition,
13803 thread, task, ignore_count, ops, from_tty,
13804 enabled, internal, flags);
13807 /* Decode the line represented by S by calling decode_line_full. This is the
13808 default function for the `decode_location' method of breakpoint_ops. */
13810 static std::vector<symtab_and_line>
13811 decode_location_default (struct breakpoint *b,
13812 const struct event_location *location,
13813 struct program_space *search_pspace)
13815 struct linespec_result canonical;
13817 decode_line_full (location, DECODE_LINE_FUNFIRSTLINE, search_pspace,
13818 (struct symtab *) NULL, 0,
13819 &canonical, multiple_symbols_all,
13822 /* We should get 0 or 1 resulting SALs. */
13823 gdb_assert (canonical.lsals.size () < 2);
13825 if (!canonical.lsals.empty ())
13827 const linespec_sals &lsal = canonical.lsals[0];
13828 return std::move (lsal.sals);
13833 /* Reset a breakpoint. */
13836 breakpoint_re_set_one (breakpoint *b)
13838 input_radix = b->input_radix;
13839 set_language (b->language);
13841 b->ops->re_set (b);
13844 /* Re-set breakpoint locations for the current program space.
13845 Locations bound to other program spaces are left untouched. */
13848 breakpoint_re_set (void)
13850 struct breakpoint *b, *b_tmp;
13853 scoped_restore_current_language save_language;
13854 scoped_restore save_input_radix = make_scoped_restore (&input_radix);
13855 scoped_restore_current_pspace_and_thread restore_pspace_thread;
13857 /* breakpoint_re_set_one sets the current_language to the language
13858 of the breakpoint it is resetting (see prepare_re_set_context)
13859 before re-evaluating the breakpoint's location. This change can
13860 unfortunately get undone by accident if the language_mode is set
13861 to auto, and we either switch frames, or more likely in this context,
13862 we select the current frame.
13864 We prevent this by temporarily turning the language_mode to
13865 language_mode_manual. We restore it once all breakpoints
13866 have been reset. */
13867 scoped_restore save_language_mode = make_scoped_restore (&language_mode);
13868 language_mode = language_mode_manual;
13870 /* Note: we must not try to insert locations until after all
13871 breakpoints have been re-set. Otherwise, e.g., when re-setting
13872 breakpoint 1, we'd insert the locations of breakpoint 2, which
13873 hadn't been re-set yet, and thus may have stale locations. */
13875 ALL_BREAKPOINTS_SAFE (b, b_tmp)
13879 breakpoint_re_set_one (b);
13881 CATCH (ex, RETURN_MASK_ALL)
13883 exception_fprintf (gdb_stderr, ex,
13884 "Error in re-setting breakpoint %d: ",
13890 jit_breakpoint_re_set ();
13893 create_overlay_event_breakpoint ();
13894 create_longjmp_master_breakpoint ();
13895 create_std_terminate_master_breakpoint ();
13896 create_exception_master_breakpoint ();
13898 /* Now we can insert. */
13899 update_global_location_list (UGLL_MAY_INSERT);
13902 /* Reset the thread number of this breakpoint:
13904 - If the breakpoint is for all threads, leave it as-is.
13905 - Else, reset it to the current thread for inferior_ptid. */
13907 breakpoint_re_set_thread (struct breakpoint *b)
13909 if (b->thread != -1)
13911 b->thread = inferior_thread ()->global_num;
13913 /* We're being called after following a fork. The new fork is
13914 selected as current, and unless this was a vfork will have a
13915 different program space from the original thread. Reset that
13917 b->loc->pspace = current_program_space;
13921 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
13922 If from_tty is nonzero, it prints a message to that effect,
13923 which ends with a period (no newline). */
13926 set_ignore_count (int bptnum, int count, int from_tty)
13928 struct breakpoint *b;
13933 ALL_BREAKPOINTS (b)
13934 if (b->number == bptnum)
13936 if (is_tracepoint (b))
13938 if (from_tty && count != 0)
13939 printf_filtered (_("Ignore count ignored for tracepoint %d."),
13944 b->ignore_count = count;
13948 printf_filtered (_("Will stop next time "
13949 "breakpoint %d is reached."),
13951 else if (count == 1)
13952 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
13955 printf_filtered (_("Will ignore next %d "
13956 "crossings of breakpoint %d."),
13959 gdb::observers::breakpoint_modified.notify (b);
13963 error (_("No breakpoint number %d."), bptnum);
13966 /* Command to set ignore-count of breakpoint N to COUNT. */
13969 ignore_command (const char *args, int from_tty)
13971 const char *p = args;
13975 error_no_arg (_("a breakpoint number"));
13977 num = get_number (&p);
13979 error (_("bad breakpoint number: '%s'"), args);
13981 error (_("Second argument (specified ignore-count) is missing."));
13983 set_ignore_count (num,
13984 longest_to_int (value_as_long (parse_and_eval (p))),
13987 printf_filtered ("\n");
13991 /* Call FUNCTION on each of the breakpoints with numbers in the range
13992 defined by BP_NUM_RANGE (an inclusive range). */
13995 map_breakpoint_number_range (std::pair<int, int> bp_num_range,
13996 gdb::function_view<void (breakpoint *)> function)
13998 if (bp_num_range.first == 0)
14000 warning (_("bad breakpoint number at or near '%d'"),
14001 bp_num_range.first);
14005 struct breakpoint *b, *tmp;
14007 for (int i = bp_num_range.first; i <= bp_num_range.second; i++)
14009 bool match = false;
14011 ALL_BREAKPOINTS_SAFE (b, tmp)
14012 if (b->number == i)
14019 printf_unfiltered (_("No breakpoint number %d.\n"), i);
14024 /* Call FUNCTION on each of the breakpoints whose numbers are given in
14028 map_breakpoint_numbers (const char *args,
14029 gdb::function_view<void (breakpoint *)> function)
14031 if (args == NULL || *args == '\0')
14032 error_no_arg (_("one or more breakpoint numbers"));
14034 number_or_range_parser parser (args);
14036 while (!parser.finished ())
14038 int num = parser.get_number ();
14039 map_breakpoint_number_range (std::make_pair (num, num), function);
14043 /* Return the breakpoint location structure corresponding to the
14044 BP_NUM and LOC_NUM values. */
14046 static struct bp_location *
14047 find_location_by_number (int bp_num, int loc_num)
14049 struct breakpoint *b;
14051 ALL_BREAKPOINTS (b)
14052 if (b->number == bp_num)
14057 if (!b || b->number != bp_num)
14058 error (_("Bad breakpoint number '%d'"), bp_num);
14061 error (_("Bad breakpoint location number '%d'"), loc_num);
14064 for (bp_location *loc = b->loc; loc != NULL; loc = loc->next)
14065 if (++n == loc_num)
14068 error (_("Bad breakpoint location number '%d'"), loc_num);
14071 /* Modes of operation for extract_bp_num. */
14072 enum class extract_bp_kind
14074 /* Extracting a breakpoint number. */
14077 /* Extracting a location number. */
14081 /* Extract a breakpoint or location number (as determined by KIND)
14082 from the string starting at START. TRAILER is a character which
14083 can be found after the number. If you don't want a trailer, use
14084 '\0'. If END_OUT is not NULL, it is set to point after the parsed
14085 string. This always returns a positive integer. */
14088 extract_bp_num (extract_bp_kind kind, const char *start,
14089 int trailer, const char **end_out = NULL)
14091 const char *end = start;
14092 int num = get_number_trailer (&end, trailer);
14094 error (kind == extract_bp_kind::bp
14095 ? _("Negative breakpoint number '%.*s'")
14096 : _("Negative breakpoint location number '%.*s'"),
14097 int (end - start), start);
14099 error (kind == extract_bp_kind::bp
14100 ? _("Bad breakpoint number '%.*s'")
14101 : _("Bad breakpoint location number '%.*s'"),
14102 int (end - start), start);
14104 if (end_out != NULL)
14109 /* Extract a breakpoint or location range (as determined by KIND) in
14110 the form NUM1-NUM2 stored at &ARG[arg_offset]. Returns a std::pair
14111 representing the (inclusive) range. The returned pair's elements
14112 are always positive integers. */
14114 static std::pair<int, int>
14115 extract_bp_or_bp_range (extract_bp_kind kind,
14116 const std::string &arg,
14117 std::string::size_type arg_offset)
14119 std::pair<int, int> range;
14120 const char *bp_loc = &arg[arg_offset];
14121 std::string::size_type dash = arg.find ('-', arg_offset);
14122 if (dash != std::string::npos)
14124 /* bp_loc is a range (x-z). */
14125 if (arg.length () == dash + 1)
14126 error (kind == extract_bp_kind::bp
14127 ? _("Bad breakpoint number at or near: '%s'")
14128 : _("Bad breakpoint location number at or near: '%s'"),
14132 const char *start_first = bp_loc;
14133 const char *start_second = &arg[dash + 1];
14134 range.first = extract_bp_num (kind, start_first, '-');
14135 range.second = extract_bp_num (kind, start_second, '\0', &end);
14137 if (range.first > range.second)
14138 error (kind == extract_bp_kind::bp
14139 ? _("Inverted breakpoint range at '%.*s'")
14140 : _("Inverted breakpoint location range at '%.*s'"),
14141 int (end - start_first), start_first);
14145 /* bp_loc is a single value. */
14146 range.first = extract_bp_num (kind, bp_loc, '\0');
14147 range.second = range.first;
14152 /* Extract the breakpoint/location range specified by ARG. Returns
14153 the breakpoint range in BP_NUM_RANGE, and the location range in
14156 ARG may be in any of the following forms:
14158 x where 'x' is a breakpoint number.
14159 x-y where 'x' and 'y' specify a breakpoint numbers range.
14160 x.y where 'x' is a breakpoint number and 'y' a location number.
14161 x.y-z where 'x' is a breakpoint number and 'y' and 'z' specify a
14162 location number range.
14166 extract_bp_number_and_location (const std::string &arg,
14167 std::pair<int, int> &bp_num_range,
14168 std::pair<int, int> &bp_loc_range)
14170 std::string::size_type dot = arg.find ('.');
14172 if (dot != std::string::npos)
14174 /* Handle 'x.y' and 'x.y-z' cases. */
14176 if (arg.length () == dot + 1 || dot == 0)
14177 error (_("Bad breakpoint number at or near: '%s'"), arg.c_str ());
14180 = extract_bp_num (extract_bp_kind::bp, arg.c_str (), '.');
14181 bp_num_range.second = bp_num_range.first;
14183 bp_loc_range = extract_bp_or_bp_range (extract_bp_kind::loc,
14188 /* Handle x and x-y cases. */
14190 bp_num_range = extract_bp_or_bp_range (extract_bp_kind::bp, arg, 0);
14191 bp_loc_range.first = 0;
14192 bp_loc_range.second = 0;
14196 /* Enable or disable a breakpoint location BP_NUM.LOC_NUM. ENABLE
14197 specifies whether to enable or disable. */
14200 enable_disable_bp_num_loc (int bp_num, int loc_num, bool enable)
14202 struct bp_location *loc = find_location_by_number (bp_num, loc_num);
14205 if (loc->enabled != enable)
14207 loc->enabled = enable;
14208 mark_breakpoint_location_modified (loc);
14210 if (target_supports_enable_disable_tracepoint ()
14211 && current_trace_status ()->running && loc->owner
14212 && is_tracepoint (loc->owner))
14213 target_disable_tracepoint (loc);
14215 update_global_location_list (UGLL_DONT_INSERT);
14217 gdb::observers::breakpoint_modified.notify (loc->owner);
14220 /* Enable or disable a range of breakpoint locations. BP_NUM is the
14221 number of the breakpoint, and BP_LOC_RANGE specifies the
14222 (inclusive) range of location numbers of that breakpoint to
14223 enable/disable. ENABLE specifies whether to enable or disable the
14227 enable_disable_breakpoint_location_range (int bp_num,
14228 std::pair<int, int> &bp_loc_range,
14231 for (int i = bp_loc_range.first; i <= bp_loc_range.second; i++)
14232 enable_disable_bp_num_loc (bp_num, i, enable);
14235 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
14236 If from_tty is nonzero, it prints a message to that effect,
14237 which ends with a period (no newline). */
14240 disable_breakpoint (struct breakpoint *bpt)
14242 /* Never disable a watchpoint scope breakpoint; we want to
14243 hit them when we leave scope so we can delete both the
14244 watchpoint and its scope breakpoint at that time. */
14245 if (bpt->type == bp_watchpoint_scope)
14248 bpt->enable_state = bp_disabled;
14250 /* Mark breakpoint locations modified. */
14251 mark_breakpoint_modified (bpt);
14253 if (target_supports_enable_disable_tracepoint ()
14254 && current_trace_status ()->running && is_tracepoint (bpt))
14256 struct bp_location *location;
14258 for (location = bpt->loc; location; location = location->next)
14259 target_disable_tracepoint (location);
14262 update_global_location_list (UGLL_DONT_INSERT);
14264 gdb::observers::breakpoint_modified.notify (bpt);
14267 /* Enable or disable the breakpoint(s) or breakpoint location(s)
14268 specified in ARGS. ARGS may be in any of the formats handled by
14269 extract_bp_number_and_location. ENABLE specifies whether to enable
14270 or disable the breakpoints/locations. */
14273 enable_disable_command (const char *args, int from_tty, bool enable)
14277 struct breakpoint *bpt;
14279 ALL_BREAKPOINTS (bpt)
14280 if (user_breakpoint_p (bpt))
14283 enable_breakpoint (bpt);
14285 disable_breakpoint (bpt);
14290 std::string num = extract_arg (&args);
14292 while (!num.empty ())
14294 std::pair<int, int> bp_num_range, bp_loc_range;
14296 extract_bp_number_and_location (num, bp_num_range, bp_loc_range);
14298 if (bp_loc_range.first == bp_loc_range.second
14299 && bp_loc_range.first == 0)
14301 /* Handle breakpoint ids with formats 'x' or 'x-z'. */
14302 map_breakpoint_number_range (bp_num_range,
14304 ? enable_breakpoint
14305 : disable_breakpoint);
14309 /* Handle breakpoint ids with formats 'x.y' or
14311 enable_disable_breakpoint_location_range
14312 (bp_num_range.first, bp_loc_range, enable);
14314 num = extract_arg (&args);
14319 /* The disable command disables the specified breakpoints/locations
14320 (or all defined breakpoints) so they're no longer effective in
14321 stopping the inferior. ARGS may be in any of the forms defined in
14322 extract_bp_number_and_location. */
14325 disable_command (const char *args, int from_tty)
14327 enable_disable_command (args, from_tty, false);
14331 enable_breakpoint_disp (struct breakpoint *bpt, enum bpdisp disposition,
14334 int target_resources_ok;
14336 if (bpt->type == bp_hardware_breakpoint)
14339 i = hw_breakpoint_used_count ();
14340 target_resources_ok =
14341 target_can_use_hardware_watchpoint (bp_hardware_breakpoint,
14343 if (target_resources_ok == 0)
14344 error (_("No hardware breakpoint support in the target."));
14345 else if (target_resources_ok < 0)
14346 error (_("Hardware breakpoints used exceeds limit."));
14349 if (is_watchpoint (bpt))
14351 /* Initialize it just to avoid a GCC false warning. */
14352 enum enable_state orig_enable_state = bp_disabled;
14356 struct watchpoint *w = (struct watchpoint *) bpt;
14358 orig_enable_state = bpt->enable_state;
14359 bpt->enable_state = bp_enabled;
14360 update_watchpoint (w, 1 /* reparse */);
14362 CATCH (e, RETURN_MASK_ALL)
14364 bpt->enable_state = orig_enable_state;
14365 exception_fprintf (gdb_stderr, e, _("Cannot enable watchpoint %d: "),
14372 bpt->enable_state = bp_enabled;
14374 /* Mark breakpoint locations modified. */
14375 mark_breakpoint_modified (bpt);
14377 if (target_supports_enable_disable_tracepoint ()
14378 && current_trace_status ()->running && is_tracepoint (bpt))
14380 struct bp_location *location;
14382 for (location = bpt->loc; location; location = location->next)
14383 target_enable_tracepoint (location);
14386 bpt->disposition = disposition;
14387 bpt->enable_count = count;
14388 update_global_location_list (UGLL_MAY_INSERT);
14390 gdb::observers::breakpoint_modified.notify (bpt);
14395 enable_breakpoint (struct breakpoint *bpt)
14397 enable_breakpoint_disp (bpt, bpt->disposition, 0);
14400 /* The enable command enables the specified breakpoints/locations (or
14401 all defined breakpoints) so they once again become (or continue to
14402 be) effective in stopping the inferior. ARGS may be in any of the
14403 forms defined in extract_bp_number_and_location. */
14406 enable_command (const char *args, int from_tty)
14408 enable_disable_command (args, from_tty, true);
14412 enable_once_command (const char *args, int from_tty)
14414 map_breakpoint_numbers
14415 (args, [&] (breakpoint *b)
14417 iterate_over_related_breakpoints
14418 (b, [&] (breakpoint *bpt)
14420 enable_breakpoint_disp (bpt, disp_disable, 1);
14426 enable_count_command (const char *args, int from_tty)
14431 error_no_arg (_("hit count"));
14433 count = get_number (&args);
14435 map_breakpoint_numbers
14436 (args, [&] (breakpoint *b)
14438 iterate_over_related_breakpoints
14439 (b, [&] (breakpoint *bpt)
14441 enable_breakpoint_disp (bpt, disp_disable, count);
14447 enable_delete_command (const char *args, int from_tty)
14449 map_breakpoint_numbers
14450 (args, [&] (breakpoint *b)
14452 iterate_over_related_breakpoints
14453 (b, [&] (breakpoint *bpt)
14455 enable_breakpoint_disp (bpt, disp_del, 1);
14461 set_breakpoint_cmd (const char *args, int from_tty)
14466 show_breakpoint_cmd (const char *args, int from_tty)
14470 /* Invalidate last known value of any hardware watchpoint if
14471 the memory which that value represents has been written to by
14475 invalidate_bp_value_on_memory_change (struct inferior *inferior,
14476 CORE_ADDR addr, ssize_t len,
14477 const bfd_byte *data)
14479 struct breakpoint *bp;
14481 ALL_BREAKPOINTS (bp)
14482 if (bp->enable_state == bp_enabled
14483 && bp->type == bp_hardware_watchpoint)
14485 struct watchpoint *wp = (struct watchpoint *) bp;
14487 if (wp->val_valid && wp->val != nullptr)
14489 struct bp_location *loc;
14491 for (loc = bp->loc; loc != NULL; loc = loc->next)
14492 if (loc->loc_type == bp_loc_hardware_watchpoint
14493 && loc->address + loc->length > addr
14494 && addr + len > loc->address)
14503 /* Create and insert a breakpoint for software single step. */
14506 insert_single_step_breakpoint (struct gdbarch *gdbarch,
14507 const address_space *aspace,
14510 struct thread_info *tp = inferior_thread ();
14511 struct symtab_and_line sal;
14512 CORE_ADDR pc = next_pc;
14514 if (tp->control.single_step_breakpoints == NULL)
14516 tp->control.single_step_breakpoints
14517 = new_single_step_breakpoint (tp->global_num, gdbarch);
14520 sal = find_pc_line (pc, 0);
14522 sal.section = find_pc_overlay (pc);
14523 sal.explicit_pc = 1;
14524 add_location_to_breakpoint (tp->control.single_step_breakpoints, &sal);
14526 update_global_location_list (UGLL_INSERT);
14529 /* Insert single step breakpoints according to the current state. */
14532 insert_single_step_breakpoints (struct gdbarch *gdbarch)
14534 struct regcache *regcache = get_current_regcache ();
14535 std::vector<CORE_ADDR> next_pcs;
14537 next_pcs = gdbarch_software_single_step (gdbarch, regcache);
14539 if (!next_pcs.empty ())
14541 struct frame_info *frame = get_current_frame ();
14542 const address_space *aspace = get_frame_address_space (frame);
14544 for (CORE_ADDR pc : next_pcs)
14545 insert_single_step_breakpoint (gdbarch, aspace, pc);
14553 /* See breakpoint.h. */
14556 breakpoint_has_location_inserted_here (struct breakpoint *bp,
14557 const address_space *aspace,
14560 struct bp_location *loc;
14562 for (loc = bp->loc; loc != NULL; loc = loc->next)
14564 && breakpoint_location_address_match (loc, aspace, pc))
14570 /* Check whether a software single-step breakpoint is inserted at
14574 single_step_breakpoint_inserted_here_p (const address_space *aspace,
14577 struct breakpoint *bpt;
14579 ALL_BREAKPOINTS (bpt)
14581 if (bpt->type == bp_single_step
14582 && breakpoint_has_location_inserted_here (bpt, aspace, pc))
14588 /* Tracepoint-specific operations. */
14590 /* Set tracepoint count to NUM. */
14592 set_tracepoint_count (int num)
14594 tracepoint_count = num;
14595 set_internalvar_integer (lookup_internalvar ("tpnum"), num);
14599 trace_command (const char *arg, int from_tty)
14601 struct breakpoint_ops *ops;
14603 event_location_up location = string_to_event_location (&arg,
14605 if (location != NULL
14606 && event_location_type (location.get ()) == PROBE_LOCATION)
14607 ops = &tracepoint_probe_breakpoint_ops;
14609 ops = &tracepoint_breakpoint_ops;
14611 create_breakpoint (get_current_arch (),
14613 NULL, 0, arg, 1 /* parse arg */,
14615 bp_tracepoint /* type_wanted */,
14616 0 /* Ignore count */,
14617 pending_break_support,
14621 0 /* internal */, 0);
14625 ftrace_command (const char *arg, int from_tty)
14627 event_location_up location = string_to_event_location (&arg,
14629 create_breakpoint (get_current_arch (),
14631 NULL, 0, arg, 1 /* parse arg */,
14633 bp_fast_tracepoint /* type_wanted */,
14634 0 /* Ignore count */,
14635 pending_break_support,
14636 &tracepoint_breakpoint_ops,
14639 0 /* internal */, 0);
14642 /* strace command implementation. Creates a static tracepoint. */
14645 strace_command (const char *arg, int from_tty)
14647 struct breakpoint_ops *ops;
14648 event_location_up location;
14650 /* Decide if we are dealing with a static tracepoint marker (`-m'),
14651 or with a normal static tracepoint. */
14652 if (arg && startswith (arg, "-m") && isspace (arg[2]))
14654 ops = &strace_marker_breakpoint_ops;
14655 location = new_linespec_location (&arg, symbol_name_match_type::FULL);
14659 ops = &tracepoint_breakpoint_ops;
14660 location = string_to_event_location (&arg, current_language);
14663 create_breakpoint (get_current_arch (),
14665 NULL, 0, arg, 1 /* parse arg */,
14667 bp_static_tracepoint /* type_wanted */,
14668 0 /* Ignore count */,
14669 pending_break_support,
14673 0 /* internal */, 0);
14676 /* Set up a fake reader function that gets command lines from a linked
14677 list that was acquired during tracepoint uploading. */
14679 static struct uploaded_tp *this_utp;
14680 static int next_cmd;
14683 read_uploaded_action (void)
14685 char *rslt = nullptr;
14687 if (next_cmd < this_utp->cmd_strings.size ())
14689 rslt = this_utp->cmd_strings[next_cmd].get ();
14696 /* Given information about a tracepoint as recorded on a target (which
14697 can be either a live system or a trace file), attempt to create an
14698 equivalent GDB tracepoint. This is not a reliable process, since
14699 the target does not necessarily have all the information used when
14700 the tracepoint was originally defined. */
14702 struct tracepoint *
14703 create_tracepoint_from_upload (struct uploaded_tp *utp)
14705 const char *addr_str;
14706 char small_buf[100];
14707 struct tracepoint *tp;
14709 if (utp->at_string)
14710 addr_str = utp->at_string.get ();
14713 /* In the absence of a source location, fall back to raw
14714 address. Since there is no way to confirm that the address
14715 means the same thing as when the trace was started, warn the
14717 warning (_("Uploaded tracepoint %d has no "
14718 "source location, using raw address"),
14720 xsnprintf (small_buf, sizeof (small_buf), "*%s", hex_string (utp->addr));
14721 addr_str = small_buf;
14724 /* There's not much we can do with a sequence of bytecodes. */
14725 if (utp->cond && !utp->cond_string)
14726 warning (_("Uploaded tracepoint %d condition "
14727 "has no source form, ignoring it"),
14730 event_location_up location = string_to_event_location (&addr_str,
14732 if (!create_breakpoint (get_current_arch (),
14734 utp->cond_string.get (), -1, addr_str,
14735 0 /* parse cond/thread */,
14737 utp->type /* type_wanted */,
14738 0 /* Ignore count */,
14739 pending_break_support,
14740 &tracepoint_breakpoint_ops,
14742 utp->enabled /* enabled */,
14744 CREATE_BREAKPOINT_FLAGS_INSERTED))
14747 /* Get the tracepoint we just created. */
14748 tp = get_tracepoint (tracepoint_count);
14749 gdb_assert (tp != NULL);
14753 xsnprintf (small_buf, sizeof (small_buf), "%d %d", utp->pass,
14756 trace_pass_command (small_buf, 0);
14759 /* If we have uploaded versions of the original commands, set up a
14760 special-purpose "reader" function and call the usual command line
14761 reader, then pass the result to the breakpoint command-setting
14763 if (!utp->cmd_strings.empty ())
14765 counted_command_line cmd_list;
14770 cmd_list = read_command_lines_1 (read_uploaded_action, 1, NULL);
14772 breakpoint_set_commands (tp, std::move (cmd_list));
14774 else if (!utp->actions.empty ()
14775 || !utp->step_actions.empty ())
14776 warning (_("Uploaded tracepoint %d actions "
14777 "have no source form, ignoring them"),
14780 /* Copy any status information that might be available. */
14781 tp->hit_count = utp->hit_count;
14782 tp->traceframe_usage = utp->traceframe_usage;
14787 /* Print information on tracepoint number TPNUM_EXP, or all if
14791 info_tracepoints_command (const char *args, int from_tty)
14793 struct ui_out *uiout = current_uiout;
14796 num_printed = breakpoint_1 (args, 0, is_tracepoint);
14798 if (num_printed == 0)
14800 if (args == NULL || *args == '\0')
14801 uiout->message ("No tracepoints.\n");
14803 uiout->message ("No tracepoint matching '%s'.\n", args);
14806 default_collect_info ();
14809 /* The 'enable trace' command enables tracepoints.
14810 Not supported by all targets. */
14812 enable_trace_command (const char *args, int from_tty)
14814 enable_command (args, from_tty);
14817 /* The 'disable trace' command disables tracepoints.
14818 Not supported by all targets. */
14820 disable_trace_command (const char *args, int from_tty)
14822 disable_command (args, from_tty);
14825 /* Remove a tracepoint (or all if no argument). */
14827 delete_trace_command (const char *arg, int from_tty)
14829 struct breakpoint *b, *b_tmp;
14835 int breaks_to_delete = 0;
14837 /* Delete all breakpoints if no argument.
14838 Do not delete internal or call-dummy breakpoints, these
14839 have to be deleted with an explicit breakpoint number
14841 ALL_TRACEPOINTS (b)
14842 if (is_tracepoint (b) && user_breakpoint_p (b))
14844 breaks_to_delete = 1;
14848 /* Ask user only if there are some breakpoints to delete. */
14850 || (breaks_to_delete && query (_("Delete all tracepoints? "))))
14852 ALL_BREAKPOINTS_SAFE (b, b_tmp)
14853 if (is_tracepoint (b) && user_breakpoint_p (b))
14854 delete_breakpoint (b);
14858 map_breakpoint_numbers
14859 (arg, [&] (breakpoint *br)
14861 iterate_over_related_breakpoints (br, delete_breakpoint);
14865 /* Helper function for trace_pass_command. */
14868 trace_pass_set_count (struct tracepoint *tp, int count, int from_tty)
14870 tp->pass_count = count;
14871 gdb::observers::breakpoint_modified.notify (tp);
14873 printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
14874 tp->number, count);
14877 /* Set passcount for tracepoint.
14879 First command argument is passcount, second is tracepoint number.
14880 If tracepoint number omitted, apply to most recently defined.
14881 Also accepts special argument "all". */
14884 trace_pass_command (const char *args, int from_tty)
14886 struct tracepoint *t1;
14889 if (args == 0 || *args == 0)
14890 error (_("passcount command requires an "
14891 "argument (count + optional TP num)"));
14893 count = strtoulst (args, &args, 10); /* Count comes first, then TP num. */
14895 args = skip_spaces (args);
14896 if (*args && strncasecmp (args, "all", 3) == 0)
14898 struct breakpoint *b;
14900 args += 3; /* Skip special argument "all". */
14902 error (_("Junk at end of arguments."));
14904 ALL_TRACEPOINTS (b)
14906 t1 = (struct tracepoint *) b;
14907 trace_pass_set_count (t1, count, from_tty);
14910 else if (*args == '\0')
14912 t1 = get_tracepoint_by_number (&args, NULL);
14914 trace_pass_set_count (t1, count, from_tty);
14918 number_or_range_parser parser (args);
14919 while (!parser.finished ())
14921 t1 = get_tracepoint_by_number (&args, &parser);
14923 trace_pass_set_count (t1, count, from_tty);
14928 struct tracepoint *
14929 get_tracepoint (int num)
14931 struct breakpoint *t;
14933 ALL_TRACEPOINTS (t)
14934 if (t->number == num)
14935 return (struct tracepoint *) t;
14940 /* Find the tracepoint with the given target-side number (which may be
14941 different from the tracepoint number after disconnecting and
14944 struct tracepoint *
14945 get_tracepoint_by_number_on_target (int num)
14947 struct breakpoint *b;
14949 ALL_TRACEPOINTS (b)
14951 struct tracepoint *t = (struct tracepoint *) b;
14953 if (t->number_on_target == num)
14960 /* Utility: parse a tracepoint number and look it up in the list.
14961 If STATE is not NULL, use, get_number_or_range_state and ignore ARG.
14962 If the argument is missing, the most recent tracepoint
14963 (tracepoint_count) is returned. */
14965 struct tracepoint *
14966 get_tracepoint_by_number (const char **arg,
14967 number_or_range_parser *parser)
14969 struct breakpoint *t;
14971 const char *instring = arg == NULL ? NULL : *arg;
14973 if (parser != NULL)
14975 gdb_assert (!parser->finished ());
14976 tpnum = parser->get_number ();
14978 else if (arg == NULL || *arg == NULL || ! **arg)
14979 tpnum = tracepoint_count;
14981 tpnum = get_number (arg);
14985 if (instring && *instring)
14986 printf_filtered (_("bad tracepoint number at or near '%s'\n"),
14989 printf_filtered (_("No previous tracepoint\n"));
14993 ALL_TRACEPOINTS (t)
14994 if (t->number == tpnum)
14996 return (struct tracepoint *) t;
14999 printf_unfiltered ("No tracepoint number %d.\n", tpnum);
15004 print_recreate_thread (struct breakpoint *b, struct ui_file *fp)
15006 if (b->thread != -1)
15007 fprintf_unfiltered (fp, " thread %d", b->thread);
15010 fprintf_unfiltered (fp, " task %d", b->task);
15012 fprintf_unfiltered (fp, "\n");
15015 /* Save information on user settable breakpoints (watchpoints, etc) to
15016 a new script file named FILENAME. If FILTER is non-NULL, call it
15017 on each breakpoint and only include the ones for which it returns
15021 save_breakpoints (const char *filename, int from_tty,
15022 int (*filter) (const struct breakpoint *))
15024 struct breakpoint *tp;
15026 int extra_trace_bits = 0;
15028 if (filename == 0 || *filename == 0)
15029 error (_("Argument required (file name in which to save)"));
15031 /* See if we have anything to save. */
15032 ALL_BREAKPOINTS (tp)
15034 /* Skip internal and momentary breakpoints. */
15035 if (!user_breakpoint_p (tp))
15038 /* If we have a filter, only save the breakpoints it accepts. */
15039 if (filter && !filter (tp))
15044 if (is_tracepoint (tp))
15046 extra_trace_bits = 1;
15048 /* We can stop searching. */
15055 warning (_("Nothing to save."));
15059 gdb::unique_xmalloc_ptr<char> expanded_filename (tilde_expand (filename));
15063 if (!fp.open (expanded_filename.get (), "w"))
15064 error (_("Unable to open file '%s' for saving (%s)"),
15065 expanded_filename.get (), safe_strerror (errno));
15067 if (extra_trace_bits)
15068 save_trace_state_variables (&fp);
15070 ALL_BREAKPOINTS (tp)
15072 /* Skip internal and momentary breakpoints. */
15073 if (!user_breakpoint_p (tp))
15076 /* If we have a filter, only save the breakpoints it accepts. */
15077 if (filter && !filter (tp))
15080 tp->ops->print_recreate (tp, &fp);
15082 /* Note, we can't rely on tp->number for anything, as we can't
15083 assume the recreated breakpoint numbers will match. Use $bpnum
15086 if (tp->cond_string)
15087 fp.printf (" condition $bpnum %s\n", tp->cond_string);
15089 if (tp->ignore_count)
15090 fp.printf (" ignore $bpnum %d\n", tp->ignore_count);
15092 if (tp->type != bp_dprintf && tp->commands)
15094 fp.puts (" commands\n");
15096 current_uiout->redirect (&fp);
15099 print_command_lines (current_uiout, tp->commands.get (), 2);
15101 CATCH (ex, RETURN_MASK_ALL)
15103 current_uiout->redirect (NULL);
15104 throw_exception (ex);
15108 current_uiout->redirect (NULL);
15109 fp.puts (" end\n");
15112 if (tp->enable_state == bp_disabled)
15113 fp.puts ("disable $bpnum\n");
15115 /* If this is a multi-location breakpoint, check if the locations
15116 should be individually disabled. Watchpoint locations are
15117 special, and not user visible. */
15118 if (!is_watchpoint (tp) && tp->loc && tp->loc->next)
15120 struct bp_location *loc;
15123 for (loc = tp->loc; loc != NULL; loc = loc->next, n++)
15125 fp.printf ("disable $bpnum.%d\n", n);
15129 if (extra_trace_bits && *default_collect)
15130 fp.printf ("set default-collect %s\n", default_collect);
15133 printf_filtered (_("Saved to file '%s'.\n"), expanded_filename.get ());
15136 /* The `save breakpoints' command. */
15139 save_breakpoints_command (const char *args, int from_tty)
15141 save_breakpoints (args, from_tty, NULL);
15144 /* The `save tracepoints' command. */
15147 save_tracepoints_command (const char *args, int from_tty)
15149 save_breakpoints (args, from_tty, is_tracepoint);
15152 /* Create a vector of all tracepoints. */
15154 std::vector<breakpoint *>
15155 all_tracepoints (void)
15157 std::vector<breakpoint *> tp_vec;
15158 struct breakpoint *tp;
15160 ALL_TRACEPOINTS (tp)
15162 tp_vec.push_back (tp);
15169 /* This help string is used to consolidate all the help string for specifying
15170 locations used by several commands. */
15172 #define LOCATION_HELP_STRING \
15173 "Linespecs are colon-separated lists of location parameters, such as\n\
15174 source filename, function name, label name, and line number.\n\
15175 Example: To specify the start of a label named \"the_top\" in the\n\
15176 function \"fact\" in the file \"factorial.c\", use\n\
15177 \"factorial.c:fact:the_top\".\n\
15179 Address locations begin with \"*\" and specify an exact address in the\n\
15180 program. Example: To specify the fourth byte past the start function\n\
15181 \"main\", use \"*main + 4\".\n\
15183 Explicit locations are similar to linespecs but use an option/argument\n\
15184 syntax to specify location parameters.\n\
15185 Example: To specify the start of the label named \"the_top\" in the\n\
15186 function \"fact\" in the file \"factorial.c\", use \"-source factorial.c\n\
15187 -function fact -label the_top\".\n\
15189 By default, a specified function is matched against the program's\n\
15190 functions in all scopes. For C++, this means in all namespaces and\n\
15191 classes. For Ada, this means in all packages. E.g., in C++,\n\
15192 \"func()\" matches \"A::func()\", \"A::B::func()\", etc. The\n\
15193 \"-qualified\" flag overrides this behavior, making GDB interpret the\n\
15194 specified name as a complete fully-qualified name instead.\n"
15196 /* This help string is used for the break, hbreak, tbreak and thbreak
15197 commands. It is defined as a macro to prevent duplication.
15198 COMMAND should be a string constant containing the name of the
15201 #define BREAK_ARGS_HELP(command) \
15202 command" [PROBE_MODIFIER] [LOCATION] [thread THREADNUM] [if CONDITION]\n\
15203 PROBE_MODIFIER shall be present if the command is to be placed in a\n\
15204 probe point. Accepted values are `-probe' (for a generic, automatically\n\
15205 guessed probe type), `-probe-stap' (for a SystemTap probe) or \n\
15206 `-probe-dtrace' (for a DTrace probe).\n\
15207 LOCATION may be a linespec, address, or explicit location as described\n\
15210 With no LOCATION, uses current execution address of the selected\n\
15211 stack frame. This is useful for breaking on return to a stack frame.\n\
15213 THREADNUM is the number from \"info threads\".\n\
15214 CONDITION is a boolean expression.\n\
15215 \n" LOCATION_HELP_STRING "\n\
15216 Multiple breakpoints at one place are permitted, and useful if their\n\
15217 conditions are different.\n\
15219 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
15221 /* List of subcommands for "catch". */
15222 static struct cmd_list_element *catch_cmdlist;
15224 /* List of subcommands for "tcatch". */
15225 static struct cmd_list_element *tcatch_cmdlist;
15228 add_catch_command (const char *name, const char *docstring,
15229 cmd_const_sfunc_ftype *sfunc,
15230 completer_ftype *completer,
15231 void *user_data_catch,
15232 void *user_data_tcatch)
15234 struct cmd_list_element *command;
15236 command = add_cmd (name, class_breakpoint, docstring,
15238 set_cmd_sfunc (command, sfunc);
15239 set_cmd_context (command, user_data_catch);
15240 set_cmd_completer (command, completer);
15242 command = add_cmd (name, class_breakpoint, docstring,
15244 set_cmd_sfunc (command, sfunc);
15245 set_cmd_context (command, user_data_tcatch);
15246 set_cmd_completer (command, completer);
15250 save_command (const char *arg, int from_tty)
15252 printf_unfiltered (_("\"save\" must be followed by "
15253 "the name of a save subcommand.\n"));
15254 help_list (save_cmdlist, "save ", all_commands, gdb_stdout);
15257 struct breakpoint *
15258 iterate_over_breakpoints (int (*callback) (struct breakpoint *, void *),
15261 struct breakpoint *b, *b_tmp;
15263 ALL_BREAKPOINTS_SAFE (b, b_tmp)
15265 if ((*callback) (b, data))
15272 /* Zero if any of the breakpoint's locations could be a location where
15273 functions have been inlined, nonzero otherwise. */
15276 is_non_inline_function (struct breakpoint *b)
15278 /* The shared library event breakpoint is set on the address of a
15279 non-inline function. */
15280 if (b->type == bp_shlib_event)
15286 /* Nonzero if the specified PC cannot be a location where functions
15287 have been inlined. */
15290 pc_at_non_inline_function (const address_space *aspace, CORE_ADDR pc,
15291 const struct target_waitstatus *ws)
15293 struct breakpoint *b;
15294 struct bp_location *bl;
15296 ALL_BREAKPOINTS (b)
15298 if (!is_non_inline_function (b))
15301 for (bl = b->loc; bl != NULL; bl = bl->next)
15303 if (!bl->shlib_disabled
15304 && bpstat_check_location (bl, aspace, pc, ws))
15312 /* Remove any references to OBJFILE which is going to be freed. */
15315 breakpoint_free_objfile (struct objfile *objfile)
15317 struct bp_location **locp, *loc;
15319 ALL_BP_LOCATIONS (loc, locp)
15320 if (loc->symtab != NULL && SYMTAB_OBJFILE (loc->symtab) == objfile)
15321 loc->symtab = NULL;
15325 initialize_breakpoint_ops (void)
15327 static int initialized = 0;
15329 struct breakpoint_ops *ops;
15335 /* The breakpoint_ops structure to be inherit by all kinds of
15336 breakpoints (real breakpoints, i.e., user "break" breakpoints,
15337 internal and momentary breakpoints, etc.). */
15338 ops = &bkpt_base_breakpoint_ops;
15339 *ops = base_breakpoint_ops;
15340 ops->re_set = bkpt_re_set;
15341 ops->insert_location = bkpt_insert_location;
15342 ops->remove_location = bkpt_remove_location;
15343 ops->breakpoint_hit = bkpt_breakpoint_hit;
15344 ops->create_sals_from_location = bkpt_create_sals_from_location;
15345 ops->create_breakpoints_sal = bkpt_create_breakpoints_sal;
15346 ops->decode_location = bkpt_decode_location;
15348 /* The breakpoint_ops structure to be used in regular breakpoints. */
15349 ops = &bkpt_breakpoint_ops;
15350 *ops = bkpt_base_breakpoint_ops;
15351 ops->re_set = bkpt_re_set;
15352 ops->resources_needed = bkpt_resources_needed;
15353 ops->print_it = bkpt_print_it;
15354 ops->print_mention = bkpt_print_mention;
15355 ops->print_recreate = bkpt_print_recreate;
15357 /* Ranged breakpoints. */
15358 ops = &ranged_breakpoint_ops;
15359 *ops = bkpt_breakpoint_ops;
15360 ops->breakpoint_hit = breakpoint_hit_ranged_breakpoint;
15361 ops->resources_needed = resources_needed_ranged_breakpoint;
15362 ops->print_it = print_it_ranged_breakpoint;
15363 ops->print_one = print_one_ranged_breakpoint;
15364 ops->print_one_detail = print_one_detail_ranged_breakpoint;
15365 ops->print_mention = print_mention_ranged_breakpoint;
15366 ops->print_recreate = print_recreate_ranged_breakpoint;
15368 /* Internal breakpoints. */
15369 ops = &internal_breakpoint_ops;
15370 *ops = bkpt_base_breakpoint_ops;
15371 ops->re_set = internal_bkpt_re_set;
15372 ops->check_status = internal_bkpt_check_status;
15373 ops->print_it = internal_bkpt_print_it;
15374 ops->print_mention = internal_bkpt_print_mention;
15376 /* Momentary breakpoints. */
15377 ops = &momentary_breakpoint_ops;
15378 *ops = bkpt_base_breakpoint_ops;
15379 ops->re_set = momentary_bkpt_re_set;
15380 ops->check_status = momentary_bkpt_check_status;
15381 ops->print_it = momentary_bkpt_print_it;
15382 ops->print_mention = momentary_bkpt_print_mention;
15384 /* Probe breakpoints. */
15385 ops = &bkpt_probe_breakpoint_ops;
15386 *ops = bkpt_breakpoint_ops;
15387 ops->insert_location = bkpt_probe_insert_location;
15388 ops->remove_location = bkpt_probe_remove_location;
15389 ops->create_sals_from_location = bkpt_probe_create_sals_from_location;
15390 ops->decode_location = bkpt_probe_decode_location;
15393 ops = &watchpoint_breakpoint_ops;
15394 *ops = base_breakpoint_ops;
15395 ops->re_set = re_set_watchpoint;
15396 ops->insert_location = insert_watchpoint;
15397 ops->remove_location = remove_watchpoint;
15398 ops->breakpoint_hit = breakpoint_hit_watchpoint;
15399 ops->check_status = check_status_watchpoint;
15400 ops->resources_needed = resources_needed_watchpoint;
15401 ops->works_in_software_mode = works_in_software_mode_watchpoint;
15402 ops->print_it = print_it_watchpoint;
15403 ops->print_mention = print_mention_watchpoint;
15404 ops->print_recreate = print_recreate_watchpoint;
15405 ops->explains_signal = explains_signal_watchpoint;
15407 /* Masked watchpoints. */
15408 ops = &masked_watchpoint_breakpoint_ops;
15409 *ops = watchpoint_breakpoint_ops;
15410 ops->insert_location = insert_masked_watchpoint;
15411 ops->remove_location = remove_masked_watchpoint;
15412 ops->resources_needed = resources_needed_masked_watchpoint;
15413 ops->works_in_software_mode = works_in_software_mode_masked_watchpoint;
15414 ops->print_it = print_it_masked_watchpoint;
15415 ops->print_one_detail = print_one_detail_masked_watchpoint;
15416 ops->print_mention = print_mention_masked_watchpoint;
15417 ops->print_recreate = print_recreate_masked_watchpoint;
15420 ops = &tracepoint_breakpoint_ops;
15421 *ops = base_breakpoint_ops;
15422 ops->re_set = tracepoint_re_set;
15423 ops->breakpoint_hit = tracepoint_breakpoint_hit;
15424 ops->print_one_detail = tracepoint_print_one_detail;
15425 ops->print_mention = tracepoint_print_mention;
15426 ops->print_recreate = tracepoint_print_recreate;
15427 ops->create_sals_from_location = tracepoint_create_sals_from_location;
15428 ops->create_breakpoints_sal = tracepoint_create_breakpoints_sal;
15429 ops->decode_location = tracepoint_decode_location;
15431 /* Probe tracepoints. */
15432 ops = &tracepoint_probe_breakpoint_ops;
15433 *ops = tracepoint_breakpoint_ops;
15434 ops->create_sals_from_location = tracepoint_probe_create_sals_from_location;
15435 ops->decode_location = tracepoint_probe_decode_location;
15437 /* Static tracepoints with marker (`-m'). */
15438 ops = &strace_marker_breakpoint_ops;
15439 *ops = tracepoint_breakpoint_ops;
15440 ops->create_sals_from_location = strace_marker_create_sals_from_location;
15441 ops->create_breakpoints_sal = strace_marker_create_breakpoints_sal;
15442 ops->decode_location = strace_marker_decode_location;
15444 /* Fork catchpoints. */
15445 ops = &catch_fork_breakpoint_ops;
15446 *ops = base_breakpoint_ops;
15447 ops->insert_location = insert_catch_fork;
15448 ops->remove_location = remove_catch_fork;
15449 ops->breakpoint_hit = breakpoint_hit_catch_fork;
15450 ops->print_it = print_it_catch_fork;
15451 ops->print_one = print_one_catch_fork;
15452 ops->print_mention = print_mention_catch_fork;
15453 ops->print_recreate = print_recreate_catch_fork;
15455 /* Vfork catchpoints. */
15456 ops = &catch_vfork_breakpoint_ops;
15457 *ops = base_breakpoint_ops;
15458 ops->insert_location = insert_catch_vfork;
15459 ops->remove_location = remove_catch_vfork;
15460 ops->breakpoint_hit = breakpoint_hit_catch_vfork;
15461 ops->print_it = print_it_catch_vfork;
15462 ops->print_one = print_one_catch_vfork;
15463 ops->print_mention = print_mention_catch_vfork;
15464 ops->print_recreate = print_recreate_catch_vfork;
15466 /* Exec catchpoints. */
15467 ops = &catch_exec_breakpoint_ops;
15468 *ops = base_breakpoint_ops;
15469 ops->insert_location = insert_catch_exec;
15470 ops->remove_location = remove_catch_exec;
15471 ops->breakpoint_hit = breakpoint_hit_catch_exec;
15472 ops->print_it = print_it_catch_exec;
15473 ops->print_one = print_one_catch_exec;
15474 ops->print_mention = print_mention_catch_exec;
15475 ops->print_recreate = print_recreate_catch_exec;
15477 /* Solib-related catchpoints. */
15478 ops = &catch_solib_breakpoint_ops;
15479 *ops = base_breakpoint_ops;
15480 ops->insert_location = insert_catch_solib;
15481 ops->remove_location = remove_catch_solib;
15482 ops->breakpoint_hit = breakpoint_hit_catch_solib;
15483 ops->check_status = check_status_catch_solib;
15484 ops->print_it = print_it_catch_solib;
15485 ops->print_one = print_one_catch_solib;
15486 ops->print_mention = print_mention_catch_solib;
15487 ops->print_recreate = print_recreate_catch_solib;
15489 ops = &dprintf_breakpoint_ops;
15490 *ops = bkpt_base_breakpoint_ops;
15491 ops->re_set = dprintf_re_set;
15492 ops->resources_needed = bkpt_resources_needed;
15493 ops->print_it = bkpt_print_it;
15494 ops->print_mention = bkpt_print_mention;
15495 ops->print_recreate = dprintf_print_recreate;
15496 ops->after_condition_true = dprintf_after_condition_true;
15497 ops->breakpoint_hit = dprintf_breakpoint_hit;
15500 /* Chain containing all defined "enable breakpoint" subcommands. */
15502 static struct cmd_list_element *enablebreaklist = NULL;
15504 /* See breakpoint.h. */
15506 cmd_list_element *commands_cmd_element = nullptr;
15509 _initialize_breakpoint (void)
15511 struct cmd_list_element *c;
15513 initialize_breakpoint_ops ();
15515 gdb::observers::solib_unloaded.attach (disable_breakpoints_in_unloaded_shlib);
15516 gdb::observers::free_objfile.attach (disable_breakpoints_in_freed_objfile);
15517 gdb::observers::memory_changed.attach (invalidate_bp_value_on_memory_change);
15519 breakpoint_objfile_key
15520 = register_objfile_data_with_cleanup (NULL, free_breakpoint_objfile_data);
15522 breakpoint_chain = 0;
15523 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
15524 before a breakpoint is set. */
15525 breakpoint_count = 0;
15527 tracepoint_count = 0;
15529 add_com ("ignore", class_breakpoint, ignore_command, _("\
15530 Set ignore-count of breakpoint number N to COUNT.\n\
15531 Usage is `ignore N COUNT'."));
15533 commands_cmd_element = add_com ("commands", class_breakpoint,
15534 commands_command, _("\
15535 Set commands to be executed when the given breakpoints are hit.\n\
15536 Give a space-separated breakpoint list as argument after \"commands\".\n\
15537 A list element can be a breakpoint number (e.g. `5') or a range of numbers\n\
15539 With no argument, the targeted breakpoint is the last one set.\n\
15540 The commands themselves follow starting on the next line.\n\
15541 Type a line containing \"end\" to indicate the end of them.\n\
15542 Give \"silent\" as the first line to make the breakpoint silent;\n\
15543 then no output is printed when it is hit, except what the commands print."));
15545 c = add_com ("condition", class_breakpoint, condition_command, _("\
15546 Specify breakpoint number N to break only if COND is true.\n\
15547 Usage is `condition N COND', where N is an integer and COND is an\n\
15548 expression to be evaluated whenever breakpoint N is reached."));
15549 set_cmd_completer (c, condition_completer);
15551 c = add_com ("tbreak", class_breakpoint, tbreak_command, _("\
15552 Set a temporary breakpoint.\n\
15553 Like \"break\" except the breakpoint is only temporary,\n\
15554 so it will be deleted when hit. Equivalent to \"break\" followed\n\
15555 by using \"enable delete\" on the breakpoint number.\n\
15557 BREAK_ARGS_HELP ("tbreak")));
15558 set_cmd_completer (c, location_completer);
15560 c = add_com ("hbreak", class_breakpoint, hbreak_command, _("\
15561 Set a hardware assisted breakpoint.\n\
15562 Like \"break\" except the breakpoint requires hardware support,\n\
15563 some target hardware may not have this support.\n\
15565 BREAK_ARGS_HELP ("hbreak")));
15566 set_cmd_completer (c, location_completer);
15568 c = add_com ("thbreak", class_breakpoint, thbreak_command, _("\
15569 Set a temporary hardware assisted breakpoint.\n\
15570 Like \"hbreak\" except the breakpoint is only temporary,\n\
15571 so it will be deleted when hit.\n\
15573 BREAK_ARGS_HELP ("thbreak")));
15574 set_cmd_completer (c, location_completer);
15576 add_prefix_cmd ("enable", class_breakpoint, enable_command, _("\
15577 Enable some breakpoints.\n\
15578 Give breakpoint numbers (separated by spaces) as arguments.\n\
15579 With no subcommand, breakpoints are enabled until you command otherwise.\n\
15580 This is used to cancel the effect of the \"disable\" command.\n\
15581 With a subcommand you can enable temporarily."),
15582 &enablelist, "enable ", 1, &cmdlist);
15584 add_com_alias ("en", "enable", class_breakpoint, 1);
15586 add_prefix_cmd ("breakpoints", class_breakpoint, enable_command, _("\
15587 Enable some breakpoints.\n\
15588 Give breakpoint numbers (separated by spaces) as arguments.\n\
15589 This is used to cancel the effect of the \"disable\" command.\n\
15590 May be abbreviated to simply \"enable\".\n"),
15591 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
15593 add_cmd ("once", no_class, enable_once_command, _("\
15594 Enable breakpoints for one hit. Give breakpoint numbers.\n\
15595 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
15598 add_cmd ("delete", no_class, enable_delete_command, _("\
15599 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
15600 If a breakpoint is hit while enabled in this fashion, it is deleted."),
15603 add_cmd ("count", no_class, enable_count_command, _("\
15604 Enable breakpoints for COUNT hits. Give count and then breakpoint numbers.\n\
15605 If a breakpoint is hit while enabled in this fashion,\n\
15606 the count is decremented; when it reaches zero, the breakpoint is disabled."),
15609 add_cmd ("delete", no_class, enable_delete_command, _("\
15610 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
15611 If a breakpoint is hit while enabled in this fashion, it is deleted."),
15614 add_cmd ("once", no_class, enable_once_command, _("\
15615 Enable breakpoints for one hit. Give breakpoint numbers.\n\
15616 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
15619 add_cmd ("count", no_class, enable_count_command, _("\
15620 Enable breakpoints for COUNT hits. Give count and then breakpoint numbers.\n\
15621 If a breakpoint is hit while enabled in this fashion,\n\
15622 the count is decremented; when it reaches zero, the breakpoint is disabled."),
15625 add_prefix_cmd ("disable", class_breakpoint, disable_command, _("\
15626 Disable some breakpoints.\n\
15627 Arguments are breakpoint numbers with spaces in between.\n\
15628 To disable all breakpoints, give no argument.\n\
15629 A disabled breakpoint is not forgotten, but has no effect until re-enabled."),
15630 &disablelist, "disable ", 1, &cmdlist);
15631 add_com_alias ("dis", "disable", class_breakpoint, 1);
15632 add_com_alias ("disa", "disable", class_breakpoint, 1);
15634 add_cmd ("breakpoints", class_alias, disable_command, _("\
15635 Disable some breakpoints.\n\
15636 Arguments are breakpoint numbers with spaces in between.\n\
15637 To disable all breakpoints, give no argument.\n\
15638 A disabled breakpoint is not forgotten, but has no effect until re-enabled.\n\
15639 This command may be abbreviated \"disable\"."),
15642 add_prefix_cmd ("delete", class_breakpoint, delete_command, _("\
15643 Delete some breakpoints or auto-display expressions.\n\
15644 Arguments are breakpoint numbers with spaces in between.\n\
15645 To delete all breakpoints, give no argument.\n\
15647 Also a prefix command for deletion of other GDB objects.\n\
15648 The \"unset\" command is also an alias for \"delete\"."),
15649 &deletelist, "delete ", 1, &cmdlist);
15650 add_com_alias ("d", "delete", class_breakpoint, 1);
15651 add_com_alias ("del", "delete", class_breakpoint, 1);
15653 add_cmd ("breakpoints", class_alias, delete_command, _("\
15654 Delete some breakpoints or auto-display expressions.\n\
15655 Arguments are breakpoint numbers with spaces in between.\n\
15656 To delete all breakpoints, give no argument.\n\
15657 This command may be abbreviated \"delete\"."),
15660 add_com ("clear", class_breakpoint, clear_command, _("\
15661 Clear breakpoint at specified location.\n\
15662 Argument may be a linespec, explicit, or address location as described below.\n\
15664 With no argument, clears all breakpoints in the line that the selected frame\n\
15665 is executing in.\n"
15666 "\n" LOCATION_HELP_STRING "\n\
15667 See also the \"delete\" command which clears breakpoints by number."));
15668 add_com_alias ("cl", "clear", class_breakpoint, 1);
15670 c = add_com ("break", class_breakpoint, break_command, _("\
15671 Set breakpoint at specified location.\n"
15672 BREAK_ARGS_HELP ("break")));
15673 set_cmd_completer (c, location_completer);
15675 add_com_alias ("b", "break", class_run, 1);
15676 add_com_alias ("br", "break", class_run, 1);
15677 add_com_alias ("bre", "break", class_run, 1);
15678 add_com_alias ("brea", "break", class_run, 1);
15682 add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command, _("\
15683 Break in function/address or break at a line in the current file."),
15684 &stoplist, "stop ", 1, &cmdlist);
15685 add_cmd ("in", class_breakpoint, stopin_command,
15686 _("Break in function or address."), &stoplist);
15687 add_cmd ("at", class_breakpoint, stopat_command,
15688 _("Break at a line in the current file."), &stoplist);
15689 add_com ("status", class_info, info_breakpoints_command, _("\
15690 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
15691 The \"Type\" column indicates one of:\n\
15692 \tbreakpoint - normal breakpoint\n\
15693 \twatchpoint - watchpoint\n\
15694 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
15695 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
15696 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
15697 address and file/line number respectively.\n\
15699 Convenience variable \"$_\" and default examine address for \"x\"\n\
15700 are set to the address of the last breakpoint listed unless the command\n\
15701 is prefixed with \"server \".\n\n\
15702 Convenience variable \"$bpnum\" contains the number of the last\n\
15703 breakpoint set."));
15706 add_info ("breakpoints", info_breakpoints_command, _("\
15707 Status of specified breakpoints (all user-settable breakpoints if no argument).\n\
15708 The \"Type\" column indicates one of:\n\
15709 \tbreakpoint - normal breakpoint\n\
15710 \twatchpoint - watchpoint\n\
15711 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
15712 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
15713 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
15714 address and file/line number respectively.\n\
15716 Convenience variable \"$_\" and default examine address for \"x\"\n\
15717 are set to the address of the last breakpoint listed unless the command\n\
15718 is prefixed with \"server \".\n\n\
15719 Convenience variable \"$bpnum\" contains the number of the last\n\
15720 breakpoint set."));
15722 add_info_alias ("b", "breakpoints", 1);
15724 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, _("\
15725 Status of all breakpoints, or breakpoint number NUMBER.\n\
15726 The \"Type\" column indicates one of:\n\
15727 \tbreakpoint - normal breakpoint\n\
15728 \twatchpoint - watchpoint\n\
15729 \tlongjmp - internal breakpoint used to step through longjmp()\n\
15730 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
15731 \tuntil - internal breakpoint used by the \"until\" command\n\
15732 \tfinish - internal breakpoint used by the \"finish\" command\n\
15733 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
15734 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
15735 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
15736 address and file/line number respectively.\n\
15738 Convenience variable \"$_\" and default examine address for \"x\"\n\
15739 are set to the address of the last breakpoint listed unless the command\n\
15740 is prefixed with \"server \".\n\n\
15741 Convenience variable \"$bpnum\" contains the number of the last\n\
15743 &maintenanceinfolist);
15745 add_prefix_cmd ("catch", class_breakpoint, catch_command, _("\
15746 Set catchpoints to catch events."),
15747 &catch_cmdlist, "catch ",
15748 0/*allow-unknown*/, &cmdlist);
15750 add_prefix_cmd ("tcatch", class_breakpoint, tcatch_command, _("\
15751 Set temporary catchpoints to catch events."),
15752 &tcatch_cmdlist, "tcatch ",
15753 0/*allow-unknown*/, &cmdlist);
15755 add_catch_command ("fork", _("Catch calls to fork."),
15756 catch_fork_command_1,
15758 (void *) (uintptr_t) catch_fork_permanent,
15759 (void *) (uintptr_t) catch_fork_temporary);
15760 add_catch_command ("vfork", _("Catch calls to vfork."),
15761 catch_fork_command_1,
15763 (void *) (uintptr_t) catch_vfork_permanent,
15764 (void *) (uintptr_t) catch_vfork_temporary);
15765 add_catch_command ("exec", _("Catch calls to exec."),
15766 catch_exec_command_1,
15770 add_catch_command ("load", _("Catch loads of shared libraries.\n\
15771 Usage: catch load [REGEX]\n\
15772 If REGEX is given, only stop for libraries matching the regular expression."),
15773 catch_load_command_1,
15777 add_catch_command ("unload", _("Catch unloads of shared libraries.\n\
15778 Usage: catch unload [REGEX]\n\
15779 If REGEX is given, only stop for libraries matching the regular expression."),
15780 catch_unload_command_1,
15785 c = add_com ("watch", class_breakpoint, watch_command, _("\
15786 Set a watchpoint for an expression.\n\
15787 Usage: watch [-l|-location] EXPRESSION\n\
15788 A watchpoint stops execution of your program whenever the value of\n\
15789 an expression changes.\n\
15790 If -l or -location is given, this evaluates EXPRESSION and watches\n\
15791 the memory to which it refers."));
15792 set_cmd_completer (c, expression_completer);
15794 c = add_com ("rwatch", class_breakpoint, rwatch_command, _("\
15795 Set a read watchpoint for an expression.\n\
15796 Usage: rwatch [-l|-location] EXPRESSION\n\
15797 A watchpoint stops execution of your program whenever the value of\n\
15798 an expression is read.\n\
15799 If -l or -location is given, this evaluates EXPRESSION and watches\n\
15800 the memory to which it refers."));
15801 set_cmd_completer (c, expression_completer);
15803 c = add_com ("awatch", class_breakpoint, awatch_command, _("\
15804 Set a watchpoint for an expression.\n\
15805 Usage: awatch [-l|-location] EXPRESSION\n\
15806 A watchpoint stops execution of your program whenever the value of\n\
15807 an expression is either read or written.\n\
15808 If -l or -location is given, this evaluates EXPRESSION and watches\n\
15809 the memory to which it refers."));
15810 set_cmd_completer (c, expression_completer);
15812 add_info ("watchpoints", info_watchpoints_command, _("\
15813 Status of specified watchpoints (all watchpoints if no argument)."));
15815 /* XXX: cagney/2005-02-23: This should be a boolean, and should
15816 respond to changes - contrary to the description. */
15817 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support,
15818 &can_use_hw_watchpoints, _("\
15819 Set debugger's willingness to use watchpoint hardware."), _("\
15820 Show debugger's willingness to use watchpoint hardware."), _("\
15821 If zero, gdb will not use hardware for new watchpoints, even if\n\
15822 such is available. (However, any hardware watchpoints that were\n\
15823 created before setting this to nonzero, will continue to use watchpoint\n\
15826 show_can_use_hw_watchpoints,
15827 &setlist, &showlist);
15829 can_use_hw_watchpoints = 1;
15831 /* Tracepoint manipulation commands. */
15833 c = add_com ("trace", class_breakpoint, trace_command, _("\
15834 Set a tracepoint at specified location.\n\
15836 BREAK_ARGS_HELP ("trace") "\n\
15837 Do \"help tracepoints\" for info on other tracepoint commands."));
15838 set_cmd_completer (c, location_completer);
15840 add_com_alias ("tp", "trace", class_alias, 0);
15841 add_com_alias ("tr", "trace", class_alias, 1);
15842 add_com_alias ("tra", "trace", class_alias, 1);
15843 add_com_alias ("trac", "trace", class_alias, 1);
15845 c = add_com ("ftrace", class_breakpoint, ftrace_command, _("\
15846 Set a fast tracepoint at specified location.\n\
15848 BREAK_ARGS_HELP ("ftrace") "\n\
15849 Do \"help tracepoints\" for info on other tracepoint commands."));
15850 set_cmd_completer (c, location_completer);
15852 c = add_com ("strace", class_breakpoint, strace_command, _("\
15853 Set a static tracepoint at location or marker.\n\
15855 strace [LOCATION] [if CONDITION]\n\
15856 LOCATION may be a linespec, explicit, or address location (described below) \n\
15857 or -m MARKER_ID.\n\n\
15858 If a marker id is specified, probe the marker with that name. With\n\
15859 no LOCATION, uses current execution address of the selected stack frame.\n\
15860 Static tracepoints accept an extra collect action -- ``collect $_sdata''.\n\
15861 This collects arbitrary user data passed in the probe point call to the\n\
15862 tracing library. You can inspect it when analyzing the trace buffer,\n\
15863 by printing the $_sdata variable like any other convenience variable.\n\
15865 CONDITION is a boolean expression.\n\
15866 \n" LOCATION_HELP_STRING "\n\
15867 Multiple tracepoints at one place are permitted, and useful if their\n\
15868 conditions are different.\n\
15870 Do \"help breakpoints\" for info on other commands dealing with breakpoints.\n\
15871 Do \"help tracepoints\" for info on other tracepoint commands."));
15872 set_cmd_completer (c, location_completer);
15874 add_info ("tracepoints", info_tracepoints_command, _("\
15875 Status of specified tracepoints (all tracepoints if no argument).\n\
15876 Convenience variable \"$tpnum\" contains the number of the\n\
15877 last tracepoint set."));
15879 add_info_alias ("tp", "tracepoints", 1);
15881 add_cmd ("tracepoints", class_trace, delete_trace_command, _("\
15882 Delete specified tracepoints.\n\
15883 Arguments are tracepoint numbers, separated by spaces.\n\
15884 No argument means delete all tracepoints."),
15886 add_alias_cmd ("tr", "tracepoints", class_trace, 1, &deletelist);
15888 c = add_cmd ("tracepoints", class_trace, disable_trace_command, _("\
15889 Disable specified tracepoints.\n\
15890 Arguments are tracepoint numbers, separated by spaces.\n\
15891 No argument means disable all tracepoints."),
15893 deprecate_cmd (c, "disable");
15895 c = add_cmd ("tracepoints", class_trace, enable_trace_command, _("\
15896 Enable specified tracepoints.\n\
15897 Arguments are tracepoint numbers, separated by spaces.\n\
15898 No argument means enable all tracepoints."),
15900 deprecate_cmd (c, "enable");
15902 add_com ("passcount", class_trace, trace_pass_command, _("\
15903 Set the passcount for a tracepoint.\n\
15904 The trace will end when the tracepoint has been passed 'count' times.\n\
15905 Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
15906 if TPNUM is omitted, passcount refers to the last tracepoint defined."));
15908 add_prefix_cmd ("save", class_breakpoint, save_command,
15909 _("Save breakpoint definitions as a script."),
15910 &save_cmdlist, "save ",
15911 0/*allow-unknown*/, &cmdlist);
15913 c = add_cmd ("breakpoints", class_breakpoint, save_breakpoints_command, _("\
15914 Save current breakpoint definitions as a script.\n\
15915 This includes all types of breakpoints (breakpoints, watchpoints,\n\
15916 catchpoints, tracepoints). Use the 'source' command in another debug\n\
15917 session to restore them."),
15919 set_cmd_completer (c, filename_completer);
15921 c = add_cmd ("tracepoints", class_trace, save_tracepoints_command, _("\
15922 Save current tracepoint definitions as a script.\n\
15923 Use the 'source' command in another debug session to restore them."),
15925 set_cmd_completer (c, filename_completer);
15927 c = add_com_alias ("save-tracepoints", "save tracepoints", class_trace, 0);
15928 deprecate_cmd (c, "save tracepoints");
15930 add_prefix_cmd ("breakpoint", class_maintenance, set_breakpoint_cmd, _("\
15931 Breakpoint specific settings\n\
15932 Configure various breakpoint-specific variables such as\n\
15933 pending breakpoint behavior"),
15934 &breakpoint_set_cmdlist, "set breakpoint ",
15935 0/*allow-unknown*/, &setlist);
15936 add_prefix_cmd ("breakpoint", class_maintenance, show_breakpoint_cmd, _("\
15937 Breakpoint specific settings\n\
15938 Configure various breakpoint-specific variables such as\n\
15939 pending breakpoint behavior"),
15940 &breakpoint_show_cmdlist, "show breakpoint ",
15941 0/*allow-unknown*/, &showlist);
15943 add_setshow_auto_boolean_cmd ("pending", no_class,
15944 &pending_break_support, _("\
15945 Set debugger's behavior regarding pending breakpoints."), _("\
15946 Show debugger's behavior regarding pending breakpoints."), _("\
15947 If on, an unrecognized breakpoint location will cause gdb to create a\n\
15948 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
15949 an error. If auto, an unrecognized breakpoint location results in a\n\
15950 user-query to see if a pending breakpoint should be created."),
15952 show_pending_break_support,
15953 &breakpoint_set_cmdlist,
15954 &breakpoint_show_cmdlist);
15956 pending_break_support = AUTO_BOOLEAN_AUTO;
15958 add_setshow_boolean_cmd ("auto-hw", no_class,
15959 &automatic_hardware_breakpoints, _("\
15960 Set automatic usage of hardware breakpoints."), _("\
15961 Show automatic usage of hardware breakpoints."), _("\
15962 If set, the debugger will automatically use hardware breakpoints for\n\
15963 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
15964 a warning will be emitted for such breakpoints."),
15966 show_automatic_hardware_breakpoints,
15967 &breakpoint_set_cmdlist,
15968 &breakpoint_show_cmdlist);
15970 add_setshow_boolean_cmd ("always-inserted", class_support,
15971 &always_inserted_mode, _("\
15972 Set mode for inserting breakpoints."), _("\
15973 Show mode for inserting breakpoints."), _("\
15974 When this mode is on, breakpoints are inserted immediately as soon as\n\
15975 they're created, kept inserted even when execution stops, and removed\n\
15976 only when the user deletes them. When this mode is off (the default),\n\
15977 breakpoints are inserted only when execution continues, and removed\n\
15978 when execution stops."),
15980 &show_always_inserted_mode,
15981 &breakpoint_set_cmdlist,
15982 &breakpoint_show_cmdlist);
15984 add_setshow_enum_cmd ("condition-evaluation", class_breakpoint,
15985 condition_evaluation_enums,
15986 &condition_evaluation_mode_1, _("\
15987 Set mode of breakpoint condition evaluation."), _("\
15988 Show mode of breakpoint condition evaluation."), _("\
15989 When this is set to \"host\", breakpoint conditions will be\n\
15990 evaluated on the host's side by GDB. When it is set to \"target\",\n\
15991 breakpoint conditions will be downloaded to the target (if the target\n\
15992 supports such feature) and conditions will be evaluated on the target's side.\n\
15993 If this is set to \"auto\" (default), this will be automatically set to\n\
15994 \"target\" if it supports condition evaluation, otherwise it will\n\
15995 be set to \"gdb\""),
15996 &set_condition_evaluation_mode,
15997 &show_condition_evaluation_mode,
15998 &breakpoint_set_cmdlist,
15999 &breakpoint_show_cmdlist);
16001 add_com ("break-range", class_breakpoint, break_range_command, _("\
16002 Set a breakpoint for an address range.\n\
16003 break-range START-LOCATION, END-LOCATION\n\
16004 where START-LOCATION and END-LOCATION can be one of the following:\n\
16005 LINENUM, for that line in the current file,\n\
16006 FILE:LINENUM, for that line in that file,\n\
16007 +OFFSET, for that number of lines after the current line\n\
16008 or the start of the range\n\
16009 FUNCTION, for the first line in that function,\n\
16010 FILE:FUNCTION, to distinguish among like-named static functions.\n\
16011 *ADDRESS, for the instruction at that address.\n\
16013 The breakpoint will stop execution of the inferior whenever it executes\n\
16014 an instruction at any address within the [START-LOCATION, END-LOCATION]\n\
16015 range (including START-LOCATION and END-LOCATION)."));
16017 c = add_com ("dprintf", class_breakpoint, dprintf_command, _("\
16018 Set a dynamic printf at specified location.\n\
16019 dprintf location,format string,arg1,arg2,...\n\
16020 location may be a linespec, explicit, or address location.\n"
16021 "\n" LOCATION_HELP_STRING));
16022 set_cmd_completer (c, location_completer);
16024 add_setshow_enum_cmd ("dprintf-style", class_support,
16025 dprintf_style_enums, &dprintf_style, _("\
16026 Set the style of usage for dynamic printf."), _("\
16027 Show the style of usage for dynamic printf."), _("\
16028 This setting chooses how GDB will do a dynamic printf.\n\
16029 If the value is \"gdb\", then the printing is done by GDB to its own\n\
16030 console, as with the \"printf\" command.\n\
16031 If the value is \"call\", the print is done by calling a function in your\n\
16032 program; by default printf(), but you can choose a different function or\n\
16033 output stream by setting dprintf-function and dprintf-channel."),
16034 update_dprintf_commands, NULL,
16035 &setlist, &showlist);
16037 dprintf_function = xstrdup ("printf");
16038 add_setshow_string_cmd ("dprintf-function", class_support,
16039 &dprintf_function, _("\
16040 Set the function to use for dynamic printf"), _("\
16041 Show the function to use for dynamic printf"), NULL,
16042 update_dprintf_commands, NULL,
16043 &setlist, &showlist);
16045 dprintf_channel = xstrdup ("");
16046 add_setshow_string_cmd ("dprintf-channel", class_support,
16047 &dprintf_channel, _("\
16048 Set the channel to use for dynamic printf"), _("\
16049 Show the channel to use for dynamic printf"), NULL,
16050 update_dprintf_commands, NULL,
16051 &setlist, &showlist);
16053 add_setshow_boolean_cmd ("disconnected-dprintf", no_class,
16054 &disconnected_dprintf, _("\
16055 Set whether dprintf continues after GDB disconnects."), _("\
16056 Show whether dprintf continues after GDB disconnects."), _("\
16057 Use this to let dprintf commands continue to hit and produce output\n\
16058 even if GDB disconnects or detaches from the target."),
16061 &setlist, &showlist);
16063 add_com ("agent-printf", class_vars, agent_printf_command, _("\
16064 agent-printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
16065 (target agent only) This is useful for formatted output in user-defined commands."));
16067 automatic_hardware_breakpoints = 1;
16069 gdb::observers::about_to_proceed.attach (breakpoint_about_to_proceed);
16070 gdb::observers::thread_exit.attach (remove_threaded_breakpoints);