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 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
113 /* These breakpoints are used to implement the "catch load" command
114 on platforms whose dynamic linkers support such functionality. */
117 /* These breakpoints are used to implement the "catch unload" command
118 on platforms whose dynamic linkers support such functionality. */
121 /* These are not really breakpoints, but are catchpoints that
122 implement the "catch fork", "catch vfork" and "catch exec" commands
123 on platforms whose kernel support such functionality. (I.e.,
124 kernels which can raise an event when a fork or exec occurs, as
125 opposed to the debugger setting breakpoints on functions named
126 "fork" or "exec".) */
132 /* States of enablement of breakpoint. */
136 bp_disabled
, /* The eventpoint is inactive, and cannot trigger. */
137 bp_enabled
, /* The eventpoint is active, and can trigger. */
138 bp_call_disabled
, /* The eventpoint has been disabled while a call
139 into the inferior is "in flight", because some
140 eventpoints interfere with the implementation of
141 a call on some targets. The eventpoint will be
142 automatically enabled and reset when the call
143 "lands" (either completes, or stops at another
145 bp_permanent
/* There is a breakpoint instruction hard-wired into
146 the target's code. Don't try to write another
147 breakpoint instruction on top of it, or restore
148 its value. Step over it using the architecture's
153 /* Disposition of breakpoint. Ie: what to do after hitting it. */
157 disp_del
, /* Delete it */
158 disp_del_at_next_stop
, /* Delete at next stop, whether hit or not */
159 disp_disable
, /* Disable it */
160 disp_donttouch
/* Leave it alone */
163 enum target_hw_bp_type
165 hw_write
= 0, /* Common HW watchpoint */
166 hw_read
= 1, /* Read HW watchpoint */
167 hw_access
= 2, /* Access HW watchpoint */
168 hw_execute
= 3 /* Execute HW breakpoint */
172 /* Information used by targets to insert and remove breakpoints. */
174 struct bp_target_info
176 /* Address at which the breakpoint was placed. This is normally the
177 same as ADDRESS from the bp_location, except when adjustment
178 happens in gdbarch_breakpoint_from_pc. The most common form of
179 adjustment is stripping an alternate ISA marker from the PC which
180 is used to determine the type of breakpoint to insert. */
181 CORE_ADDR placed_address
;
183 /* If the breakpoint lives in memory and reading that memory would
184 give back the breakpoint, instead of the original contents, then
185 the original contents are cached here. Only SHADOW_LEN bytes of
186 this buffer are valid, and only when the breakpoint is inserted. */
187 gdb_byte shadow_contents
[BREAKPOINT_MAX
];
189 /* The length of the data cached in SHADOW_CONTENTS. */
192 /* The size of the placed breakpoint, according to
193 gdbarch_breakpoint_from_pc, when the breakpoint was inserted. This is
194 generally the same as SHADOW_LEN, unless we did not need
195 to read from the target to implement the memory breakpoint
196 (e.g. if a remote stub handled the details). We may still
197 need the size to remove the breakpoint safely. */
201 /* GDB maintains two types of information about each breakpoint (or
202 watchpoint, or other related event). The first type corresponds
203 to struct breakpoint; this is a relatively high-level structure
204 which contains the source location(s), stopping conditions, user
205 commands to execute when the breakpoint is hit, and so forth.
207 The second type of information corresponds to struct bp_location.
208 Each breakpoint has one or (eventually) more locations associated
209 with it, which represent target-specific and machine-specific
210 mechanisms for stopping the program. For instance, a watchpoint
211 expression may require multiple hardware watchpoints in order to
212 catch all changes in the value of the expression being watched. */
216 bp_loc_software_breakpoint
,
217 bp_loc_hardware_breakpoint
,
218 bp_loc_hardware_watchpoint
,
219 bp_loc_other
/* Miscellaneous... */
224 /* Chain pointer to the next breakpoint location for
225 the same parent breakpoint. */
226 struct bp_location
*next
;
228 /* Pointer to the next breakpoint location, in a global
229 list of all breakpoint locations. */
230 struct bp_location
*global_next
;
232 /* Type of this breakpoint location. */
233 enum bp_loc_type loc_type
;
235 /* Each breakpoint location must belong to exactly one higher-level
236 breakpoint. This and the DUPLICATE flag are more straightforward
237 than reference counting. */
238 struct breakpoint
*owner
;
240 /* Conditional. Break only if this expression's value is nonzero.
241 Unlike string form of condition, which is associated with breakpoint,
242 this is associated with location, since if breakpoint has several
243 locations, the evaluation of expression can be different for
244 different locations. */
245 struct expression
*cond
;
247 /* This location's address is in an unloaded solib, and so this
248 location should not be inserted. It will be automatically
249 enabled when that solib is loaded. */
252 /* Is this particular location enabled. */
255 /* Nonzero if this breakpoint is now inserted. */
258 /* Nonzero if this is not the first breakpoint in the list
259 for the given address. */
262 /* If we someday support real thread-specific breakpoints, then
263 the breakpoint location will need a thread identifier. */
265 /* Data for specific breakpoint types. These could be a union, but
266 simplicity is more important than memory usage for breakpoints. */
268 /* Note that zero is a perfectly valid code address on some platforms
269 (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
270 is not a special value for this field. Valid for all types except
274 /* For hardware watchpoints, the size of data ad ADDRESS being watches. */
277 /* Type of hardware watchpoint. */
278 enum target_hw_bp_type watchpoint_type
;
280 /* For any breakpoint type with an address, this is the section
281 associated with the address. Used primarily for overlay debugging. */
282 struct obj_section
*section
;
284 /* Address at which breakpoint was requested, either by the user or
285 by GDB for internal breakpoints. This will usually be the same
286 as ``address'' (above) except for cases in which
287 ADJUST_BREAKPOINT_ADDRESS has computed a different address at
288 which to place the breakpoint in order to comply with a
289 processor's architectual constraints. */
290 CORE_ADDR requested_address
;
294 /* Details of the placed breakpoint, when inserted. */
295 struct bp_target_info target_info
;
297 /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
298 struct bp_target_info overlay_target_info
;
300 /* In a non-stop mode, it's possible that we delete a breakpoint,
301 but as we do that, some still running thread hits that breakpoint.
302 For that reason, we need to keep locations belonging to deleted
303 breakpoints for a bit, so that don't report unexpected SIGTRAP.
304 We can't keep such locations forever, so we use a heuristic --
305 after we process certain number of inferior events since
306 breakpoint was deleted, we retire all locations of that breakpoint.
307 This variable keeps a number of events still to go, when
308 it becomes 0 this location is retired. */
309 int events_till_retirement
;
312 /* This structure is a collection of function pointers that, if available,
313 will be called instead of the performing the default action for this
316 struct breakpoint_ops
318 /* The normal print routine for this breakpoint, called when we
320 enum print_stop_action (*print_it
) (struct breakpoint
*);
322 /* Display information about this breakpoint, for "info breakpoints". */
323 void (*print_one
) (struct breakpoint
*, CORE_ADDR
*);
325 /* Display information about this breakpoint after setting it (roughly
326 speaking; this is called from "mention"). */
327 void (*print_mention
) (struct breakpoint
*);
330 enum watchpoint_triggered
332 /* This watchpoint definitely did not trigger. */
333 watch_triggered_no
= 0,
335 /* Some hardware watchpoint triggered, and it might have been this
336 one, but we do not know which it was. */
337 watch_triggered_unknown
,
339 /* This hardware watchpoint definitely did trigger. */
343 typedef struct bp_location
*bp_location_p
;
344 DEF_VEC_P(bp_location_p
);
346 /* Note that the ->silent field is not currently used by any commands
347 (though the code is in there if it was to be, and set_raw_breakpoint
348 does set it to 0). I implemented it because I thought it would be
349 useful for a hack I had to put in; I'm going to leave it in because
350 I can see how there might be times when it would indeed be useful */
352 /* This is for a breakpoint or a watchpoint. */
356 struct breakpoint
*next
;
357 /* Type of breakpoint. */
359 /* Zero means disabled; remember the info but don't break here. */
360 enum enable_state enable_state
;
361 /* What to do with this breakpoint after we hit it. */
362 enum bpdisp disposition
;
363 /* Number assigned to distinguish breakpoints. */
366 /* Location(s) associated with this high-level breakpoint. */
367 struct bp_location
*loc
;
369 /* Line number of this address. */
373 /* Source file name of this address. */
377 /* Non-zero means a silent breakpoint (don't print frame info
379 unsigned char silent
;
380 /* Number of stops at this breakpoint that should
381 be continued automatically before really stopping. */
383 /* Chain of command lines to execute when this breakpoint is hit. */
384 struct command_line
*commands
;
385 /* Stack depth (address of frame). If nonzero, break only if fp
387 struct frame_id frame_id
;
389 /* String we used to set the breakpoint (malloc'd). */
391 /* Language we used to set the breakpoint. */
392 enum language language
;
393 /* Input radix we used to set the breakpoint. */
395 /* String form of the breakpoint condition (malloc'd), or NULL if there
398 /* String form of exp (malloc'd), or NULL if none. */
401 /* The expression we are watching, or NULL if not a watchpoint. */
402 struct expression
*exp
;
403 /* The largest block within which it is valid, or NULL if it is
404 valid anywhere (e.g. consists just of global symbols). */
405 struct block
*exp_valid_block
;
406 /* Value of the watchpoint the last time we checked it, or NULL
407 when we do not know the value yet or the value was not
408 readable. VAL is never lazy. */
410 /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
411 then an error occurred reading the value. */
414 /* Holds the address of the related watchpoint_scope breakpoint
415 when using watchpoints on local variables (might the concept
416 of a related breakpoint be useful elsewhere, if not just call
417 it the watchpoint_scope breakpoint or something like that. FIXME). */
418 struct breakpoint
*related_breakpoint
;
420 /* Holds the frame address which identifies the frame this
421 watchpoint should be evaluated in, or `null' if the watchpoint
422 should be evaluated on the outermost frame. */
423 struct frame_id watchpoint_frame
;
425 /* For hardware watchpoints, the triggered status according to the
427 enum watchpoint_triggered watchpoint_triggered
;
429 /* Thread number for thread-specific breakpoint, or -1 if don't care */
432 /* Count of the number of times this breakpoint was taken, dumped
433 with the info, but not used for anything else. Useful for
434 seeing how many times you hit a break prior to the program
435 aborting, so you can back up to just before the abort. */
438 /* Filename of a dynamically-linked library (dll), used for
439 bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
440 library is significant. */
443 /* Filename of a dll whose state change (e.g., load or unload)
444 triggered this catchpoint. This field is only valid immediately
445 after this catchpoint has triggered. */
446 char *triggered_dll_pathname
;
448 /* Process id of a child process whose forking triggered this
449 catchpoint. This field is only valid immediately after this
450 catchpoint has triggered. */
451 ptid_t forked_inferior_pid
;
453 /* Filename of a program whose exec triggered this catchpoint.
454 This field is only valid immediately after this catchpoint has
458 /* Methods associated with this breakpoint. */
459 struct breakpoint_ops
*ops
;
461 /* Is breakpoint's condition not yet parsed because we found
462 no location initially so had no context to parse
464 int condition_not_parsed
;
467 typedef struct breakpoint
*breakpoint_p
;
468 DEF_VEC_P(breakpoint_p
);
470 /* The following stuff is an abstract data type "bpstat" ("breakpoint
471 status"). This provides the ability to determine whether we have
472 stopped at a breakpoint, and what we should do about it. */
474 typedef struct bpstats
*bpstat
;
476 /* Frees any storage that is part of a bpstat.
477 Does not walk the 'next' chain. */
478 extern void bpstat_free (bpstat
);
480 /* Clears a chain of bpstat, freeing storage
482 extern void bpstat_clear (bpstat
*);
484 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
485 is part of the bpstat is copied as well. */
486 extern bpstat
bpstat_copy (bpstat
);
488 extern bpstat
bpstat_stop_status (CORE_ADDR pc
, ptid_t ptid
);
490 /* This bpstat_what stuff tells wait_for_inferior what to do with a
491 breakpoint (a challenging task). */
493 enum bpstat_what_main_action
495 /* Perform various other tests; that is, this bpstat does not
496 say to perform any action (e.g. failed watchpoint and nothing
498 BPSTAT_WHAT_KEEP_CHECKING
,
500 /* Rather than distinguish between noisy and silent stops here, it
501 might be cleaner to have bpstat_print make that decision (also
502 taking into account stop_print_frame and source_only). But the
503 implications are a bit scary (interaction with auto-displays, etc.),
504 so I won't try it. */
507 BPSTAT_WHAT_STOP_SILENT
,
509 /* Stop and print. */
510 BPSTAT_WHAT_STOP_NOISY
,
512 /* Remove breakpoints, single step once, then put them back in and
513 go back to what we were doing. It's possible that this should be
514 removed from the main_action and put into a separate field, to more
515 cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
518 /* Set longjmp_resume breakpoint, remove all other breakpoints,
519 and continue. The "remove all other breakpoints" part is required
520 if we are also stepping over another breakpoint as well as doing
521 the longjmp handling. */
522 BPSTAT_WHAT_SET_LONGJMP_RESUME
,
524 /* Clear longjmp_resume breakpoint, then handle as
525 BPSTAT_WHAT_KEEP_CHECKING. */
526 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
,
528 /* Clear step resume breakpoint, and keep checking. */
529 BPSTAT_WHAT_STEP_RESUME
,
531 /* Check the dynamic linker's data structures for new libraries, then
533 BPSTAT_WHAT_CHECK_SHLIBS
,
535 /* Check the dynamic linker's data structures for new libraries, then
536 resume out of the dynamic linker's callback, stop and print. */
537 BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
,
539 /* This is just used to keep track of how many enums there are. */
545 enum bpstat_what_main_action main_action
;
547 /* Did we hit a call dummy breakpoint? This only goes with a main_action
548 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
549 continuing from a call dummy without popping the frame is not a
554 /* The possible return values for print_bpstat, print_it_normal,
555 print_it_done, print_it_noop. */
556 enum print_stop_action
564 /* Tell what to do about this bpstat. */
565 struct bpstat_what
bpstat_what (bpstat
);
567 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
568 bpstat
bpstat_find_breakpoint (bpstat
, struct breakpoint
*);
570 /* Find a step_resume breakpoint associated with this bpstat.
571 (If there are multiple step_resume bp's on the list, this function
572 will arbitrarily pick one.)
574 It is an error to use this function if BPSTAT doesn't contain a
575 step_resume breakpoint.
577 See wait_for_inferior's use of this function.
579 extern struct breakpoint
*bpstat_find_step_resume_breakpoint (bpstat
);
581 /* Nonzero if a signal that we got in wait() was due to circumstances
582 explained by the BS. */
583 /* Currently that is true if we have hit a breakpoint, or if there is
584 a watchpoint enabled. */
585 #define bpstat_explains_signal(bs) ((bs) != NULL)
587 /* Nonzero if we should step constantly (e.g. watchpoints on machines
588 without hardware support). This isn't related to a specific bpstat,
589 just to things like whether watchpoints are set. */
590 extern int bpstat_should_step (void);
592 /* Print a message indicating what happened. Returns nonzero to
593 say that only the source line should be printed after this (zero
594 return means print the frame as well as the source line). */
595 extern enum print_stop_action
bpstat_print (bpstat
);
597 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
598 at. *BSP upon return is a bpstat which points to the remaining
599 breakpoints stopped at (but which is not guaranteed to be good for
600 anything but further calls to bpstat_num).
601 Return 0 if passed a bpstat which does not indicate any breakpoints.
602 Return -1 if stopped at a breakpoint that has been deleted since
604 Return 1 otherwise. */
605 extern int bpstat_num (bpstat
*, int *);
607 /* Perform actions associated with the stopped inferior. Actually, we
608 just use this for breakpoint commands. Perhaps other actions will
609 go here later, but this is executed at a late time (from the
611 extern void bpstat_do_actions (void);
613 /* Modify BS so that the actions will not be performed. */
614 extern void bpstat_clear_actions (bpstat
);
616 /* Given a bpstat that records zero or more triggered eventpoints, this
617 function returns another bpstat which contains only the catchpoints
618 on that first list, if any.
620 extern void bpstat_get_triggered_catchpoints (bpstat
, bpstat
*);
622 /* Implementation: */
624 /* Values used to tell the printing routine how to behave for this bpstat. */
627 /* This is used when we want to do a normal printing of the reason
628 for stopping. The output will depend on the type of eventpoint
629 we are dealing with. This is the default value, most commonly
632 /* This is used when nothing should be printed for this bpstat entry. */
634 /* This is used when everything which needs to be printed has
635 already been printed. But we still want to print the frame. */
641 /* Linked list because there can be two breakpoints at the same
642 place, and a bpstat reflects the fact that both have been hit. */
644 /* Breakpoint that we are at. */
645 const struct bp_location
*breakpoint_at
;
646 /* Commands left to be done. */
647 struct command_line
*commands
;
648 /* Old value associated with a watchpoint. */
649 struct value
*old_val
;
651 /* Nonzero if this breakpoint tells us to print the frame. */
654 /* Nonzero if this breakpoint tells us to stop. */
657 /* Tell bpstat_print and print_bp_stop_message how to print stuff
658 associated with this element of the bpstat chain. */
659 enum bp_print_how print_it
;
670 /* The possible return values for breakpoint_here_p.
671 We guarantee that zero always means "no breakpoint here". */
674 no_breakpoint_here
= 0,
675 ordinary_breakpoint_here
,
676 permanent_breakpoint_here
680 /* Prototypes for breakpoint-related functions. */
682 extern enum breakpoint_here
breakpoint_here_p (CORE_ADDR
);
684 extern int moribund_breakpoint_here_p (CORE_ADDR
);
686 extern int breakpoint_inserted_here_p (CORE_ADDR
);
688 extern int regular_breakpoint_inserted_here_p (CORE_ADDR
);
690 extern int software_breakpoint_inserted_here_p (CORE_ADDR
);
692 extern int breakpoint_thread_match (CORE_ADDR
, ptid_t
);
694 extern void until_break_command (char *, int, int);
696 extern void breakpoint_re_set (void);
698 extern void breakpoint_re_set_thread (struct breakpoint
*);
700 extern struct breakpoint
*set_momentary_breakpoint
701 (struct symtab_and_line
, struct frame_id
, enum bptype
);
703 extern struct breakpoint
*set_momentary_breakpoint_at_pc
704 (CORE_ADDR pc
, enum bptype type
);
706 extern void set_ignore_count (int, int, int);
708 extern void set_default_breakpoint (int, CORE_ADDR
, struct symtab
*, int);
710 extern void breakpoint_init_inferior (enum inf_context
);
712 extern struct cleanup
*make_cleanup_delete_breakpoint (struct breakpoint
*);
714 extern void delete_breakpoint (struct breakpoint
*);
716 extern void breakpoint_auto_delete (bpstat
);
718 extern void break_command (char *, int);
720 extern void hbreak_command_wrapper (char *, int);
721 extern void thbreak_command_wrapper (char *, int);
722 extern void rbreak_command_wrapper (char *, int);
723 extern void watch_command_wrapper (char *, int);
724 extern void awatch_command_wrapper (char *, int);
725 extern void rwatch_command_wrapper (char *, int);
726 extern void tbreak_command (char *, int);
728 extern void set_breakpoint (char *address
, char *condition
,
729 int hardwareflag
, int tempflag
,
730 int thread
, int ignore_count
,
733 extern void insert_breakpoints (void);
735 extern int remove_breakpoints (void);
737 /* This function can be used to physically insert eventpoints from the
738 specified traced inferior process, without modifying the breakpoint
739 package's state. This can be useful for those targets which support
740 following the processes of a fork() or vfork() system call, when both
741 of the resulting two processes are to be followed. */
742 extern int reattach_breakpoints (int);
744 /* This function can be used to update the breakpoint package's state
745 after an exec() system call has been executed.
747 This function causes the following:
749 - All eventpoints are marked "not inserted".
750 - All eventpoints with a symbolic address are reset such that
751 the symbolic address must be reevaluated before the eventpoints
753 - The solib breakpoints are explicitly removed from the breakpoint
755 - A step-resume breakpoint, if any, is explicitly removed from the
757 - All eventpoints without a symbolic address are removed from the
759 extern void update_breakpoints_after_exec (void);
761 /* This function can be used to physically remove hardware breakpoints
762 and watchpoints from the specified traced inferior process, without
763 modifying the breakpoint package's state. This can be useful for
764 those targets which support following the processes of a fork() or
765 vfork() system call, when one of the resulting two processes is to
766 be detached and allowed to run free.
768 It is an error to use this function on the process whose id is
770 extern int detach_breakpoints (int);
772 extern void set_longjmp_breakpoint (void);
773 extern void delete_longjmp_breakpoint (int thread
);
775 extern void enable_overlay_breakpoints (void);
776 extern void disable_overlay_breakpoints (void);
778 /* These functions respectively disable or reenable all currently
779 enabled watchpoints. When disabled, the watchpoints are marked
780 call_disabled. When reenabled, they are marked enabled.
782 The intended client of these functions is call_function_by_hand.
784 The inferior must be stopped, and all breakpoints removed, when
785 these functions are used.
787 The need for these functions is that on some targets (e.g., HP-UX),
788 gdb is unable to unwind through the dummy frame that is pushed as
789 part of the implementation of a call command. Watchpoints can
790 cause the inferior to stop in places where this frame is visible,
791 and that can cause execution control to become very confused.
793 Note that if a user sets breakpoints in an interactively called
794 function, the call_disabled watchpoints will have been reenabled
795 when the first such breakpoint is reached. However, on targets
796 that are unable to unwind through the call dummy frame, watches
797 of stack-based storage may then be deleted, because gdb will
798 believe that their watched storage is out of scope. (Sigh.) */
799 extern void disable_watchpoints_before_interactive_call_start (void);
801 extern void enable_watchpoints_after_interactive_call_stop (void);
803 /* For script interpreters that need to define breakpoint commands
804 after they've already read the commands into a struct command_line. */
805 extern enum command_control_type commands_from_control_command
806 (char *arg
, struct command_line
*cmd
);
808 extern void clear_breakpoint_hit_counts (void);
810 extern int get_number (char **);
812 extern int get_number_or_range (char **);
814 /* The following are for displays, which aren't really breakpoints, but
815 here is as good a place as any for them. */
817 extern void disable_current_display (void);
819 extern void do_displays (void);
821 extern void disable_display (int);
823 extern void clear_displays (void);
825 extern void disable_breakpoint (struct breakpoint
*);
827 extern void enable_breakpoint (struct breakpoint
*);
829 /* Clear the "inserted" flag in all breakpoints. */
830 extern void mark_breakpoints_out (void);
832 extern void make_breakpoint_permanent (struct breakpoint
*);
834 extern struct breakpoint
*create_solib_event_breakpoint (CORE_ADDR
);
836 extern struct breakpoint
*create_thread_event_breakpoint (CORE_ADDR
);
838 extern void remove_solib_event_breakpoints (void);
840 extern void remove_thread_event_breakpoints (void);
842 extern void disable_breakpoints_in_shlibs (void);
844 /* This function returns TRUE if ep is a catchpoint. */
845 extern int ep_is_catchpoint (struct breakpoint
*);
847 /* This function returns TRUE if ep is a catchpoint of a
848 shared library (aka dynamically-linked library) event,
849 such as a library load or unload. */
850 extern int ep_is_shlib_catchpoint (struct breakpoint
*);
852 /* Enable breakpoints and delete when hit. Called with ARG == NULL
853 deletes all breakpoints. */
854 extern void delete_command (char *arg
, int from_tty
);
856 /* Pull all H/W watchpoints from the target. Return non-zero if the
858 extern int remove_hw_watchpoints (void);
860 /* Manage a software single step breakpoint (or two). Insert may be called
861 twice before remove is called. */
862 extern void insert_single_step_breakpoint (CORE_ADDR
);
863 extern void remove_single_step_breakpoints (void);
865 /* Manage manual breakpoints, separate from the normal chain of
866 breakpoints. These functions are used in murky target-specific
867 ways. Please do not add more uses! */
868 extern void *deprecated_insert_raw_breakpoint (CORE_ADDR
);
869 extern int deprecated_remove_raw_breakpoint (void *);
871 /* Check if any hardware watchpoints have triggered, according to the
873 int watchpoints_triggered (struct target_waitstatus
*);
875 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
876 by replacing any memory breakpoints with their shadowed contents. */
877 void breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
,
880 extern int breakpoints_always_inserted_mode (void);
882 /* Called each time new event from target is processed.
883 Retires previously deleted breakpoint locations that
884 in our opinion won't ever trigger. */
885 extern void breakpoint_retire_moribund (void);
887 #endif /* !defined (BREAKPOINT_H) */