1 /* Data structures associated with breakpoints in GDB.
2 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
3 2002, 2003, 2004, 2007, 2008, 2009 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/>. */
20 #if !defined (BREAKPOINT_H)
21 #define BREAKPOINT_H 1
30 /* This is the maximum number of bytes a breakpoint instruction can take.
31 Feel free to increase it. It's just used in a few places to size
32 arrays that should be independent of the target architecture. */
34 #define BREAKPOINT_MAX 16
36 /* Type of breakpoint. */
37 /* FIXME In the future, we should fold all other breakpoint-like things into
40 * single-step (for machines where we have to simulate single stepping)
41 (probably, though perhaps it is better for it to look as much as
42 possible like a single-step to wait_for_inferior). */
46 bp_none = 0, /* Eventpoint has been deleted. */
47 bp_breakpoint, /* Normal breakpoint */
48 bp_hardware_breakpoint, /* Hardware assisted breakpoint */
49 bp_until, /* used by until command */
50 bp_finish, /* used by finish command */
51 bp_watchpoint, /* Watchpoint */
52 bp_hardware_watchpoint, /* Hardware assisted watchpoint */
53 bp_read_watchpoint, /* read watchpoint, (hardware assisted) */
54 bp_access_watchpoint, /* access watchpoint, (hardware assisted) */
55 bp_longjmp, /* secret breakpoint to find longjmp() */
56 bp_longjmp_resume, /* secret breakpoint to escape longjmp() */
58 /* Used by wait_for_inferior for stepping over subroutine calls, for
59 stepping over signal handlers, and for skipping prologues. */
62 /* Used to detect when a watchpoint expression has gone out of
63 scope. These breakpoints are usually not visible to the user.
65 This breakpoint has some interesting properties:
67 1) There's always a 1:1 mapping between watchpoints
68 on local variables and watchpoint_scope breakpoints.
70 2) It automatically deletes itself and the watchpoint it's
71 associated with when hit.
73 3) It can never be disabled. */
76 /* The breakpoint at the end of a call dummy. */
77 /* FIXME: What if the function we are calling longjmp()s out of the
78 call, or the user gets out with the "return" command? We currently
79 have no way of cleaning up the breakpoint in these (obscure) situations.
80 (Probably can solve this by noticing longjmp, "return", etc., it's
81 similar to noticing when a watchpoint on a local variable goes out
82 of scope (with hardware support for watchpoints)). */
85 /* Some dynamic linkers (HP, maybe Solaris) can arrange for special
86 code in the inferior to run when significant events occur in the
87 dynamic linker (for example a library is loaded or unloaded).
89 By placing a breakpoint in this magic code GDB will get control
90 when these significant events occur. GDB can then re-examine
91 the dynamic linker's data structures to discover any newly loaded
95 /* Some multi-threaded systems can arrange for a location in the
96 inferior to be executed when certain thread-related events occur
97 (such as thread creation or thread death).
99 By placing a breakpoint at one of these locations, GDB will get
100 control when these events occur. GDB can then update its thread
105 /* On the same principal, an overlay manager can arrange to call a
106 magic location in the inferior whenever there is an interesting
107 change in overlay status. GDB can update its overlay tables
108 and fiddle with breakpoints in overlays when this breakpoint
116 /* States of enablement of breakpoint. */
120 bp_disabled, /* The eventpoint is inactive, and cannot trigger. */
121 bp_enabled, /* The eventpoint is active, and can trigger. */
122 bp_call_disabled, /* The eventpoint has been disabled while a call
123 into the inferior is "in flight", because some
124 eventpoints interfere with the implementation of
125 a call on some targets. The eventpoint will be
126 automatically enabled and reset when the call
127 "lands" (either completes, or stops at another
129 bp_permanent /* There is a breakpoint instruction hard-wired into
130 the target's code. Don't try to write another
131 breakpoint instruction on top of it, or restore
132 its value. Step over it using the architecture's
137 /* Disposition of breakpoint. Ie: what to do after hitting it. */
141 disp_del, /* Delete it */
142 disp_del_at_next_stop, /* Delete at next stop, whether hit or not */
143 disp_disable, /* Disable it */
144 disp_donttouch /* Leave it alone */
147 enum target_hw_bp_type
149 hw_write = 0, /* Common HW watchpoint */
150 hw_read = 1, /* Read HW watchpoint */
151 hw_access = 2, /* Access HW watchpoint */
152 hw_execute = 3 /* Execute HW breakpoint */
156 /* Information used by targets to insert and remove breakpoints. */
158 struct bp_target_info
160 /* Address at which the breakpoint was placed. This is normally the
161 same as ADDRESS from the bp_location, except when adjustment
162 happens in gdbarch_breakpoint_from_pc. The most common form of
163 adjustment is stripping an alternate ISA marker from the PC which
164 is used to determine the type of breakpoint to insert. */
165 CORE_ADDR placed_address;
167 /* If the breakpoint lives in memory and reading that memory would
168 give back the breakpoint, instead of the original contents, then
169 the original contents are cached here. Only SHADOW_LEN bytes of
170 this buffer are valid, and only when the breakpoint is inserted. */
171 gdb_byte shadow_contents[BREAKPOINT_MAX];
173 /* The length of the data cached in SHADOW_CONTENTS. */
176 /* The size of the placed breakpoint, according to
177 gdbarch_breakpoint_from_pc, when the breakpoint was inserted. This is
178 generally the same as SHADOW_LEN, unless we did not need
179 to read from the target to implement the memory breakpoint
180 (e.g. if a remote stub handled the details). We may still
181 need the size to remove the breakpoint safely. */
185 /* GDB maintains two types of information about each breakpoint (or
186 watchpoint, or other related event). The first type corresponds
187 to struct breakpoint; this is a relatively high-level structure
188 which contains the source location(s), stopping conditions, user
189 commands to execute when the breakpoint is hit, and so forth.
191 The second type of information corresponds to struct bp_location.
192 Each breakpoint has one or (eventually) more locations associated
193 with it, which represent target-specific and machine-specific
194 mechanisms for stopping the program. For instance, a watchpoint
195 expression may require multiple hardware watchpoints in order to
196 catch all changes in the value of the expression being watched. */
200 bp_loc_software_breakpoint,
201 bp_loc_hardware_breakpoint,
202 bp_loc_hardware_watchpoint,
203 bp_loc_other /* Miscellaneous... */
208 /* Chain pointer to the next breakpoint location for
209 the same parent breakpoint. */
210 struct bp_location *next;
212 /* Pointer to the next breakpoint location, in a global
213 list of all breakpoint locations. */
214 struct bp_location *global_next;
216 /* Type of this breakpoint location. */
217 enum bp_loc_type loc_type;
219 /* Each breakpoint location must belong to exactly one higher-level
220 breakpoint. This and the DUPLICATE flag are more straightforward
221 than reference counting. */
222 struct breakpoint *owner;
224 /* Conditional. Break only if this expression's value is nonzero.
225 Unlike string form of condition, which is associated with breakpoint,
226 this is associated with location, since if breakpoint has several
227 locations, the evaluation of expression can be different for
228 different locations. */
229 struct expression *cond;
231 /* This location's address is in an unloaded solib, and so this
232 location should not be inserted. It will be automatically
233 enabled when that solib is loaded. */
236 /* Is this particular location enabled. */
239 /* Nonzero if this breakpoint is now inserted. */
242 /* Nonzero if this is not the first breakpoint in the list
243 for the given address. */
246 /* If we someday support real thread-specific breakpoints, then
247 the breakpoint location will need a thread identifier. */
249 /* Data for specific breakpoint types. These could be a union, but
250 simplicity is more important than memory usage for breakpoints. */
252 /* Note that zero is a perfectly valid code address on some platforms
253 (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
254 is not a special value for this field. Valid for all types except
258 /* For hardware watchpoints, the size of data ad ADDRESS being watches. */
261 /* Type of hardware watchpoint. */
262 enum target_hw_bp_type watchpoint_type;
264 /* For any breakpoint type with an address, this is the section
265 associated with the address. Used primarily for overlay debugging. */
266 struct obj_section *section;
268 /* Address at which breakpoint was requested, either by the user or
269 by GDB for internal breakpoints. This will usually be the same
270 as ``address'' (above) except for cases in which
271 ADJUST_BREAKPOINT_ADDRESS has computed a different address at
272 which to place the breakpoint in order to comply with a
273 processor's architectual constraints. */
274 CORE_ADDR requested_address;
278 /* Details of the placed breakpoint, when inserted. */
279 struct bp_target_info target_info;
281 /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
282 struct bp_target_info overlay_target_info;
284 /* In a non-stop mode, it's possible that we delete a breakpoint,
285 but as we do that, some still running thread hits that breakpoint.
286 For that reason, we need to keep locations belonging to deleted
287 breakpoints for a bit, so that don't report unexpected SIGTRAP.
288 We can't keep such locations forever, so we use a heuristic --
289 after we process certain number of inferior events since
290 breakpoint was deleted, we retire all locations of that breakpoint.
291 This variable keeps a number of events still to go, when
292 it becomes 0 this location is retired. */
293 int events_till_retirement;
296 /* This structure is a collection of function pointers that, if available,
297 will be called instead of the performing the default action for this
300 struct breakpoint_ops
302 /* Insert the breakpoint or activate the catchpoint. Should raise
303 an exception if the operation failed. */
304 void (*insert) (struct breakpoint *);
306 /* Remove the breakpoint/catchpoint that was previously inserted
307 with the "insert" method above. Return non-zero if the operation
309 int (*remove) (struct breakpoint *);
311 /* Return non-zero if the debugger should tell the user that this
312 breakpoint was hit. */
313 int (*breakpoint_hit) (struct breakpoint *);
315 /* The normal print routine for this breakpoint, called when we
317 enum print_stop_action (*print_it) (struct breakpoint *);
319 /* Display information about this breakpoint, for "info breakpoints". */
320 void (*print_one) (struct breakpoint *, CORE_ADDR *);
322 /* Display information about this breakpoint after setting it (roughly
323 speaking; this is called from "mention"). */
324 void (*print_mention) (struct breakpoint *);
327 enum watchpoint_triggered
329 /* This watchpoint definitely did not trigger. */
330 watch_triggered_no = 0,
332 /* Some hardware watchpoint triggered, and it might have been this
333 one, but we do not know which it was. */
334 watch_triggered_unknown,
336 /* This hardware watchpoint definitely did trigger. */
340 typedef struct bp_location *bp_location_p;
341 DEF_VEC_P(bp_location_p);
343 /* Note that the ->silent field is not currently used by any commands
344 (though the code is in there if it was to be, and set_raw_breakpoint
345 does set it to 0). I implemented it because I thought it would be
346 useful for a hack I had to put in; I'm going to leave it in because
347 I can see how there might be times when it would indeed be useful */
349 /* This is for a breakpoint or a watchpoint. */
353 struct breakpoint *next;
354 /* Type of breakpoint. */
356 /* Zero means disabled; remember the info but don't break here. */
357 enum enable_state enable_state;
358 /* What to do with this breakpoint after we hit it. */
359 enum bpdisp disposition;
360 /* Number assigned to distinguish breakpoints. */
363 /* Location(s) associated with this high-level breakpoint. */
364 struct bp_location *loc;
366 /* Line number of this address. */
370 /* Source file name of this address. */
374 /* Non-zero means a silent breakpoint (don't print frame info
376 unsigned char silent;
377 /* Number of stops at this breakpoint that should
378 be continued automatically before really stopping. */
380 /* Chain of command lines to execute when this breakpoint is hit. */
381 struct command_line *commands;
382 /* Stack depth (address of frame). If nonzero, break only if fp
384 struct frame_id frame_id;
386 /* String we used to set the breakpoint (malloc'd). */
388 /* Language we used to set the breakpoint. */
389 enum language language;
390 /* Input radix we used to set the breakpoint. */
392 /* String form of the breakpoint condition (malloc'd), or NULL if there
395 /* String form of exp (malloc'd), or NULL if none. */
398 /* The expression we are watching, or NULL if not a watchpoint. */
399 struct expression *exp;
400 /* The largest block within which it is valid, or NULL if it is
401 valid anywhere (e.g. consists just of global symbols). */
402 struct block *exp_valid_block;
403 /* Value of the watchpoint the last time we checked it, or NULL
404 when we do not know the value yet or the value was not
405 readable. VAL is never lazy. */
407 /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
408 then an error occurred reading the value. */
411 /* Holds the address of the related watchpoint_scope breakpoint
412 when using watchpoints on local variables (might the concept
413 of a related breakpoint be useful elsewhere, if not just call
414 it the watchpoint_scope breakpoint or something like that. FIXME). */
415 struct breakpoint *related_breakpoint;
417 /* Holds the frame address which identifies the frame this
418 watchpoint should be evaluated in, or `null' if the watchpoint
419 should be evaluated on the outermost frame. */
420 struct frame_id watchpoint_frame;
422 /* For hardware watchpoints, the triggered status according to the
424 enum watchpoint_triggered watchpoint_triggered;
426 /* Thread number for thread-specific breakpoint, or -1 if don't care */
429 /* Count of the number of times this breakpoint was taken, dumped
430 with the info, but not used for anything else. Useful for
431 seeing how many times you hit a break prior to the program
432 aborting, so you can back up to just before the abort. */
435 /* Process id of a child process whose forking triggered this
436 catchpoint. This field is only valid immediately after this
437 catchpoint has triggered. */
438 ptid_t forked_inferior_pid;
440 /* Filename of a program whose exec triggered this catchpoint.
441 This field is only valid immediately after this catchpoint has
445 /* Methods associated with this breakpoint. */
446 struct breakpoint_ops *ops;
448 /* Is breakpoint's condition not yet parsed because we found
449 no location initially so had no context to parse
451 int condition_not_parsed;
454 typedef struct breakpoint *breakpoint_p;
455 DEF_VEC_P(breakpoint_p);
457 /* The following stuff is an abstract data type "bpstat" ("breakpoint
458 status"). This provides the ability to determine whether we have
459 stopped at a breakpoint, and what we should do about it. */
461 typedef struct bpstats *bpstat;
463 /* Frees any storage that is part of a bpstat.
464 Does not walk the 'next' chain. */
465 extern void bpstat_free (bpstat);
467 /* Clears a chain of bpstat, freeing storage
469 extern void bpstat_clear (bpstat *);
471 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
472 is part of the bpstat is copied as well. */
473 extern bpstat bpstat_copy (bpstat);
475 extern bpstat bpstat_stop_status (CORE_ADDR pc, ptid_t ptid);
477 /* This bpstat_what stuff tells wait_for_inferior what to do with a
478 breakpoint (a challenging task). */
480 enum bpstat_what_main_action
482 /* Perform various other tests; that is, this bpstat does not
483 say to perform any action (e.g. failed watchpoint and nothing
485 BPSTAT_WHAT_KEEP_CHECKING,
487 /* Rather than distinguish between noisy and silent stops here, it
488 might be cleaner to have bpstat_print make that decision (also
489 taking into account stop_print_frame and source_only). But the
490 implications are a bit scary (interaction with auto-displays, etc.),
491 so I won't try it. */
494 BPSTAT_WHAT_STOP_SILENT,
496 /* Stop and print. */
497 BPSTAT_WHAT_STOP_NOISY,
499 /* Remove breakpoints, single step once, then put them back in and
500 go back to what we were doing. It's possible that this should be
501 removed from the main_action and put into a separate field, to more
502 cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
505 /* Set longjmp_resume breakpoint, remove all other breakpoints,
506 and continue. The "remove all other breakpoints" part is required
507 if we are also stepping over another breakpoint as well as doing
508 the longjmp handling. */
509 BPSTAT_WHAT_SET_LONGJMP_RESUME,
511 /* Clear longjmp_resume breakpoint, then handle as
512 BPSTAT_WHAT_KEEP_CHECKING. */
513 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME,
515 /* Clear step resume breakpoint, and keep checking. */
516 BPSTAT_WHAT_STEP_RESUME,
518 /* Check the dynamic linker's data structures for new libraries, then
520 BPSTAT_WHAT_CHECK_SHLIBS,
522 /* This is just used to keep track of how many enums there are. */
528 enum bpstat_what_main_action main_action;
530 /* Did we hit a call dummy breakpoint? This only goes with a main_action
531 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
532 continuing from a call dummy without popping the frame is not a
537 /* The possible return values for print_bpstat, print_it_normal,
538 print_it_done, print_it_noop. */
539 enum print_stop_action
547 /* Tell what to do about this bpstat. */
548 struct bpstat_what bpstat_what (bpstat);
550 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
551 bpstat bpstat_find_breakpoint (bpstat, struct breakpoint *);
553 /* Find a step_resume breakpoint associated with this bpstat.
554 (If there are multiple step_resume bp's on the list, this function
555 will arbitrarily pick one.)
557 It is an error to use this function if BPSTAT doesn't contain a
558 step_resume breakpoint.
560 See wait_for_inferior's use of this function.
562 extern struct breakpoint *bpstat_find_step_resume_breakpoint (bpstat);
564 /* Nonzero if a signal that we got in wait() was due to circumstances
565 explained by the BS. */
566 /* Currently that is true if we have hit a breakpoint, or if there is
567 a watchpoint enabled. */
568 #define bpstat_explains_signal(bs) ((bs) != NULL)
570 /* Nonzero if we should step constantly (e.g. watchpoints on machines
571 without hardware support). This isn't related to a specific bpstat,
572 just to things like whether watchpoints are set. */
573 extern int bpstat_should_step (void);
575 /* Print a message indicating what happened. Returns nonzero to
576 say that only the source line should be printed after this (zero
577 return means print the frame as well as the source line). */
578 extern enum print_stop_action bpstat_print (bpstat);
580 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
581 at. *BSP upon return is a bpstat which points to the remaining
582 breakpoints stopped at (but which is not guaranteed to be good for
583 anything but further calls to bpstat_num).
584 Return 0 if passed a bpstat which does not indicate any breakpoints.
585 Return -1 if stopped at a breakpoint that has been deleted since
587 Return 1 otherwise. */
588 extern int bpstat_num (bpstat *, int *);
590 /* Perform actions associated with the stopped inferior. Actually, we
591 just use this for breakpoint commands. Perhaps other actions will
592 go here later, but this is executed at a late time (from the
594 extern void bpstat_do_actions (void);
596 /* Modify BS so that the actions will not be performed. */
597 extern void bpstat_clear_actions (bpstat);
599 /* Implementation: */
601 /* Values used to tell the printing routine how to behave for this bpstat. */
604 /* This is used when we want to do a normal printing of the reason
605 for stopping. The output will depend on the type of eventpoint
606 we are dealing with. This is the default value, most commonly
609 /* This is used when nothing should be printed for this bpstat entry. */
611 /* This is used when everything which needs to be printed has
612 already been printed. But we still want to print the frame. */
618 /* Linked list because there can be two breakpoints at the same
619 place, and a bpstat reflects the fact that both have been hit. */
621 /* Breakpoint that we are at. */
622 const struct bp_location *breakpoint_at;
623 /* Commands left to be done. */
624 struct command_line *commands;
625 /* Old value associated with a watchpoint. */
626 struct value *old_val;
628 /* Nonzero if this breakpoint tells us to print the frame. */
631 /* Nonzero if this breakpoint tells us to stop. */
634 /* Tell bpstat_print and print_bp_stop_message how to print stuff
635 associated with this element of the bpstat chain. */
636 enum bp_print_how print_it;
647 /* The possible return values for breakpoint_here_p.
648 We guarantee that zero always means "no breakpoint here". */
651 no_breakpoint_here = 0,
652 ordinary_breakpoint_here,
653 permanent_breakpoint_here
657 /* Prototypes for breakpoint-related functions. */
659 extern enum breakpoint_here breakpoint_here_p (CORE_ADDR);
661 extern int moribund_breakpoint_here_p (CORE_ADDR);
663 extern int breakpoint_inserted_here_p (CORE_ADDR);
665 extern int regular_breakpoint_inserted_here_p (CORE_ADDR);
667 extern int software_breakpoint_inserted_here_p (CORE_ADDR);
669 extern int breakpoint_thread_match (CORE_ADDR, ptid_t);
671 extern void until_break_command (char *, int, int);
673 extern void breakpoint_re_set (void);
675 extern void breakpoint_re_set_thread (struct breakpoint *);
677 extern struct breakpoint *set_momentary_breakpoint
678 (struct symtab_and_line, struct frame_id, enum bptype);
680 extern struct breakpoint *set_momentary_breakpoint_at_pc
681 (CORE_ADDR pc, enum bptype type);
683 extern void set_ignore_count (int, int, int);
685 extern void set_default_breakpoint (int, CORE_ADDR, struct symtab *, int);
687 extern void breakpoint_init_inferior (enum inf_context);
689 extern struct cleanup *make_cleanup_delete_breakpoint (struct breakpoint *);
691 extern void delete_breakpoint (struct breakpoint *);
693 extern void breakpoint_auto_delete (bpstat);
695 extern void break_command (char *, int);
697 extern void hbreak_command_wrapper (char *, int);
698 extern void thbreak_command_wrapper (char *, int);
699 extern void rbreak_command_wrapper (char *, int);
700 extern void watch_command_wrapper (char *, int);
701 extern void awatch_command_wrapper (char *, int);
702 extern void rwatch_command_wrapper (char *, int);
703 extern void tbreak_command (char *, int);
705 extern void set_breakpoint (char *address, char *condition,
706 int hardwareflag, int tempflag,
707 int thread, int ignore_count,
711 extern void insert_breakpoints (void);
713 extern int remove_breakpoints (void);
715 /* This function can be used to physically insert eventpoints from the
716 specified traced inferior process, without modifying the breakpoint
717 package's state. This can be useful for those targets which support
718 following the processes of a fork() or vfork() system call, when both
719 of the resulting two processes are to be followed. */
720 extern int reattach_breakpoints (int);
722 /* This function can be used to update the breakpoint package's state
723 after an exec() system call has been executed.
725 This function causes the following:
727 - All eventpoints are marked "not inserted".
728 - All eventpoints with a symbolic address are reset such that
729 the symbolic address must be reevaluated before the eventpoints
731 - The solib breakpoints are explicitly removed from the breakpoint
733 - A step-resume breakpoint, if any, is explicitly removed from the
735 - All eventpoints without a symbolic address are removed from the
737 extern void update_breakpoints_after_exec (void);
739 /* This function can be used to physically remove hardware breakpoints
740 and watchpoints from the specified traced inferior process, without
741 modifying the breakpoint package's state. This can be useful for
742 those targets which support following the processes of a fork() or
743 vfork() system call, when one of the resulting two processes is to
744 be detached and allowed to run free.
746 It is an error to use this function on the process whose id is
748 extern int detach_breakpoints (int);
750 extern void set_longjmp_breakpoint (void);
751 extern void delete_longjmp_breakpoint (int thread);
753 extern void enable_overlay_breakpoints (void);
754 extern void disable_overlay_breakpoints (void);
756 /* These functions respectively disable or reenable all currently
757 enabled watchpoints. When disabled, the watchpoints are marked
758 call_disabled. When reenabled, they are marked enabled.
760 The intended client of these functions is call_function_by_hand.
762 The inferior must be stopped, and all breakpoints removed, when
763 these functions are used.
765 The need for these functions is that on some targets (e.g., HP-UX),
766 gdb is unable to unwind through the dummy frame that is pushed as
767 part of the implementation of a call command. Watchpoints can
768 cause the inferior to stop in places where this frame is visible,
769 and that can cause execution control to become very confused.
771 Note that if a user sets breakpoints in an interactively called
772 function, the call_disabled watchpoints will have been reenabled
773 when the first such breakpoint is reached. However, on targets
774 that are unable to unwind through the call dummy frame, watches
775 of stack-based storage may then be deleted, because gdb will
776 believe that their watched storage is out of scope. (Sigh.) */
777 extern void disable_watchpoints_before_interactive_call_start (void);
779 extern void enable_watchpoints_after_interactive_call_stop (void);
781 /* For script interpreters that need to define breakpoint commands
782 after they've already read the commands into a struct command_line. */
783 extern enum command_control_type commands_from_control_command
784 (char *arg, struct command_line *cmd);
786 extern void clear_breakpoint_hit_counts (void);
788 extern int get_number (char **);
790 extern int get_number_or_range (char **);
792 /* The following are for displays, which aren't really breakpoints, but
793 here is as good a place as any for them. */
795 extern void disable_current_display (void);
797 extern void do_displays (void);
799 extern void disable_display (int);
801 extern void clear_displays (void);
803 extern void disable_breakpoint (struct breakpoint *);
805 extern void enable_breakpoint (struct breakpoint *);
807 /* Clear the "inserted" flag in all breakpoints. */
808 extern void mark_breakpoints_out (void);
810 extern void make_breakpoint_permanent (struct breakpoint *);
812 extern struct breakpoint *create_solib_event_breakpoint (CORE_ADDR);
814 extern struct breakpoint *create_thread_event_breakpoint (CORE_ADDR);
816 extern void remove_solib_event_breakpoints (void);
818 extern void remove_thread_event_breakpoints (void);
820 extern void disable_breakpoints_in_shlibs (void);
822 /* This function returns TRUE if ep is a catchpoint. */
823 extern int ep_is_catchpoint (struct breakpoint *);
825 /* Enable breakpoints and delete when hit. Called with ARG == NULL
826 deletes all breakpoints. */
827 extern void delete_command (char *arg, int from_tty);
829 /* Pull all H/W watchpoints from the target. Return non-zero if the
831 extern int remove_hw_watchpoints (void);
833 /* Manage a software single step breakpoint (or two). Insert may be called
834 twice before remove is called. */
835 extern void insert_single_step_breakpoint (CORE_ADDR);
836 extern void remove_single_step_breakpoints (void);
838 /* Manage manual breakpoints, separate from the normal chain of
839 breakpoints. These functions are used in murky target-specific
840 ways. Please do not add more uses! */
841 extern void *deprecated_insert_raw_breakpoint (CORE_ADDR);
842 extern int deprecated_remove_raw_breakpoint (void *);
844 /* Check if any hardware watchpoints have triggered, according to the
846 int watchpoints_triggered (struct target_waitstatus *);
848 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
849 by replacing any memory breakpoints with their shadowed contents. */
850 void breakpoint_restore_shadows (gdb_byte *buf, ULONGEST memaddr,
853 extern int breakpoints_always_inserted_mode (void);
855 /* Called each time new event from target is processed.
856 Retires previously deleted breakpoint locations that
857 in our opinion won't ever trigger. */
858 extern void breakpoint_retire_moribund (void);
860 /* Tell a breakpoint to be quiet. */
861 extern void make_breakpoint_silent (struct breakpoint *);
863 #endif /* !defined (BREAKPOINT_H) */