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
113 /* Master copies of longjmp breakpoints. These are always installed
114 as soon as an objfile containing longjmp is loaded, but they are
115 always disabled. While necessary, temporary clones of bp_longjmp
116 type will be created and enabled. */
125 /* States of enablement of breakpoint. */
129 bp_disabled
, /* The eventpoint is inactive, and cannot trigger. */
130 bp_enabled
, /* The eventpoint is active, and can trigger. */
131 bp_call_disabled
, /* The eventpoint has been disabled while a call
132 into the inferior is "in flight", because some
133 eventpoints interfere with the implementation of
134 a call on some targets. The eventpoint will be
135 automatically enabled and reset when the call
136 "lands" (either completes, or stops at another
138 bp_permanent
/* There is a breakpoint instruction hard-wired into
139 the target's code. Don't try to write another
140 breakpoint instruction on top of it, or restore
141 its value. Step over it using the architecture's
146 /* Disposition of breakpoint. Ie: what to do after hitting it. */
150 disp_del
, /* Delete it */
151 disp_del_at_next_stop
, /* Delete at next stop, whether hit or not */
152 disp_disable
, /* Disable it */
153 disp_donttouch
/* Leave it alone */
156 enum target_hw_bp_type
158 hw_write
= 0, /* Common HW watchpoint */
159 hw_read
= 1, /* Read HW watchpoint */
160 hw_access
= 2, /* Access HW watchpoint */
161 hw_execute
= 3 /* Execute HW breakpoint */
165 /* Information used by targets to insert and remove breakpoints. */
167 struct bp_target_info
169 /* Address at which the breakpoint was placed. This is normally the
170 same as ADDRESS from the bp_location, except when adjustment
171 happens in gdbarch_breakpoint_from_pc. The most common form of
172 adjustment is stripping an alternate ISA marker from the PC which
173 is used to determine the type of breakpoint to insert. */
174 CORE_ADDR placed_address
;
176 /* If the breakpoint lives in memory and reading that memory would
177 give back the breakpoint, instead of the original contents, then
178 the original contents are cached here. Only SHADOW_LEN bytes of
179 this buffer are valid, and only when the breakpoint is inserted. */
180 gdb_byte shadow_contents
[BREAKPOINT_MAX
];
182 /* The length of the data cached in SHADOW_CONTENTS. */
185 /* The size of the placed breakpoint, according to
186 gdbarch_breakpoint_from_pc, when the breakpoint was inserted. This is
187 generally the same as SHADOW_LEN, unless we did not need
188 to read from the target to implement the memory breakpoint
189 (e.g. if a remote stub handled the details). We may still
190 need the size to remove the breakpoint safely. */
194 /* GDB maintains two types of information about each breakpoint (or
195 watchpoint, or other related event). The first type corresponds
196 to struct breakpoint; this is a relatively high-level structure
197 which contains the source location(s), stopping conditions, user
198 commands to execute when the breakpoint is hit, and so forth.
200 The second type of information corresponds to struct bp_location.
201 Each breakpoint has one or (eventually) more locations associated
202 with it, which represent target-specific and machine-specific
203 mechanisms for stopping the program. For instance, a watchpoint
204 expression may require multiple hardware watchpoints in order to
205 catch all changes in the value of the expression being watched. */
209 bp_loc_software_breakpoint
,
210 bp_loc_hardware_breakpoint
,
211 bp_loc_hardware_watchpoint
,
212 bp_loc_other
/* Miscellaneous... */
217 /* Chain pointer to the next breakpoint location for
218 the same parent breakpoint. */
219 struct bp_location
*next
;
221 /* Pointer to the next breakpoint location, in a global
222 list of all breakpoint locations. */
223 struct bp_location
*global_next
;
225 /* Type of this breakpoint location. */
226 enum bp_loc_type loc_type
;
228 /* Each breakpoint location must belong to exactly one higher-level
229 breakpoint. This and the DUPLICATE flag are more straightforward
230 than reference counting. */
231 struct breakpoint
*owner
;
233 /* Conditional. Break only if this expression's value is nonzero.
234 Unlike string form of condition, which is associated with breakpoint,
235 this is associated with location, since if breakpoint has several
236 locations, the evaluation of expression can be different for
237 different locations. */
238 struct expression
*cond
;
240 /* This location's address is in an unloaded solib, and so this
241 location should not be inserted. It will be automatically
242 enabled when that solib is loaded. */
245 /* Is this particular location enabled. */
248 /* Nonzero if this breakpoint is now inserted. */
251 /* Nonzero if this is not the first breakpoint in the list
252 for the given address. */
255 /* If we someday support real thread-specific breakpoints, then
256 the breakpoint location will need a thread identifier. */
258 /* Data for specific breakpoint types. These could be a union, but
259 simplicity is more important than memory usage for breakpoints. */
261 /* Note that zero is a perfectly valid code address on some platforms
262 (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
263 is not a special value for this field. Valid for all types except
267 /* For hardware watchpoints, the size of data ad ADDRESS being watches. */
270 /* Type of hardware watchpoint. */
271 enum target_hw_bp_type watchpoint_type
;
273 /* For any breakpoint type with an address, this is the section
274 associated with the address. Used primarily for overlay debugging. */
275 struct obj_section
*section
;
277 /* Address at which breakpoint was requested, either by the user or
278 by GDB for internal breakpoints. This will usually be the same
279 as ``address'' (above) except for cases in which
280 ADJUST_BREAKPOINT_ADDRESS has computed a different address at
281 which to place the breakpoint in order to comply with a
282 processor's architectual constraints. */
283 CORE_ADDR requested_address
;
287 /* Details of the placed breakpoint, when inserted. */
288 struct bp_target_info target_info
;
290 /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
291 struct bp_target_info overlay_target_info
;
293 /* In a non-stop mode, it's possible that we delete a breakpoint,
294 but as we do that, some still running thread hits that breakpoint.
295 For that reason, we need to keep locations belonging to deleted
296 breakpoints for a bit, so that don't report unexpected SIGTRAP.
297 We can't keep such locations forever, so we use a heuristic --
298 after we process certain number of inferior events since
299 breakpoint was deleted, we retire all locations of that breakpoint.
300 This variable keeps a number of events still to go, when
301 it becomes 0 this location is retired. */
302 int events_till_retirement
;
305 /* This structure is a collection of function pointers that, if available,
306 will be called instead of the performing the default action for this
309 struct breakpoint_ops
311 /* Insert the breakpoint or activate the catchpoint. Should raise
312 an exception if the operation failed. */
313 void (*insert
) (struct breakpoint
*);
315 /* Remove the breakpoint/catchpoint that was previously inserted
316 with the "insert" method above. Return non-zero if the operation
318 int (*remove
) (struct breakpoint
*);
320 /* Return non-zero if the debugger should tell the user that this
321 breakpoint was hit. */
322 int (*breakpoint_hit
) (struct breakpoint
*);
324 /* The normal print routine for this breakpoint, called when we
326 enum print_stop_action (*print_it
) (struct breakpoint
*);
328 /* Display information about this breakpoint, for "info breakpoints". */
329 void (*print_one
) (struct breakpoint
*, CORE_ADDR
*);
331 /* Display information about this breakpoint after setting it (roughly
332 speaking; this is called from "mention"). */
333 void (*print_mention
) (struct breakpoint
*);
336 enum watchpoint_triggered
338 /* This watchpoint definitely did not trigger. */
339 watch_triggered_no
= 0,
341 /* Some hardware watchpoint triggered, and it might have been this
342 one, but we do not know which it was. */
343 watch_triggered_unknown
,
345 /* This hardware watchpoint definitely did trigger. */
349 typedef struct bp_location
*bp_location_p
;
350 DEF_VEC_P(bp_location_p
);
352 /* Note that the ->silent field is not currently used by any commands
353 (though the code is in there if it was to be, and set_raw_breakpoint
354 does set it to 0). I implemented it because I thought it would be
355 useful for a hack I had to put in; I'm going to leave it in because
356 I can see how there might be times when it would indeed be useful */
358 /* This is for a breakpoint or a watchpoint. */
362 struct breakpoint
*next
;
363 /* Type of breakpoint. */
365 /* Zero means disabled; remember the info but don't break here. */
366 enum enable_state enable_state
;
367 /* What to do with this breakpoint after we hit it. */
368 enum bpdisp disposition
;
369 /* Number assigned to distinguish breakpoints. */
372 /* Location(s) associated with this high-level breakpoint. */
373 struct bp_location
*loc
;
375 /* Line number of this address. */
379 /* Source file name of this address. */
383 /* Non-zero means a silent breakpoint (don't print frame info
385 unsigned char silent
;
386 /* Number of stops at this breakpoint that should
387 be continued automatically before really stopping. */
389 /* Chain of command lines to execute when this breakpoint is hit. */
390 struct command_line
*commands
;
391 /* Stack depth (address of frame). If nonzero, break only if fp
393 struct frame_id frame_id
;
395 /* String we used to set the breakpoint (malloc'd). */
397 /* Language we used to set the breakpoint. */
398 enum language language
;
399 /* Input radix we used to set the breakpoint. */
401 /* String form of the breakpoint condition (malloc'd), or NULL if there
404 /* String form of exp (malloc'd), or NULL if none. */
407 /* The expression we are watching, or NULL if not a watchpoint. */
408 struct expression
*exp
;
409 /* The largest block within which it is valid, or NULL if it is
410 valid anywhere (e.g. consists just of global symbols). */
411 struct block
*exp_valid_block
;
412 /* Value of the watchpoint the last time we checked it, or NULL
413 when we do not know the value yet or the value was not
414 readable. VAL is never lazy. */
416 /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
417 then an error occurred reading the value. */
420 /* Holds the address of the related watchpoint_scope breakpoint
421 when using watchpoints on local variables (might the concept
422 of a related breakpoint be useful elsewhere, if not just call
423 it the watchpoint_scope breakpoint or something like that. FIXME). */
424 struct breakpoint
*related_breakpoint
;
426 /* Holds the frame address which identifies the frame this
427 watchpoint should be evaluated in, or `null' if the watchpoint
428 should be evaluated on the outermost frame. */
429 struct frame_id watchpoint_frame
;
431 /* For hardware watchpoints, the triggered status according to the
433 enum watchpoint_triggered watchpoint_triggered
;
435 /* Thread number for thread-specific breakpoint, or -1 if don't care. */
438 /* Ada task number for task-specific breakpoint, or 0 if don't care. */
441 /* Count of the number of times this breakpoint was taken, dumped
442 with the info, but not used for anything else. Useful for
443 seeing how many times you hit a break prior to the program
444 aborting, so you can back up to just before the abort. */
447 /* Process id of a child process whose forking triggered this
448 catchpoint. This field is only valid immediately after this
449 catchpoint has triggered. */
450 ptid_t forked_inferior_pid
;
452 /* Filename of a program whose exec triggered this catchpoint.
453 This field is only valid immediately after this catchpoint has
457 /* Methods associated with this breakpoint. */
458 struct breakpoint_ops
*ops
;
460 /* Is breakpoint's condition not yet parsed because we found
461 no location initially so had no context to parse
463 int condition_not_parsed
;
465 /* Number of times this tracepoint should single-step
466 and collect additional data. */
469 /* Number of times this tracepoint should be hit before
473 /* Chain of action lines to execute when this tracepoint is hit. */
474 struct action_line
*actions
;
477 typedef struct breakpoint
*breakpoint_p
;
478 DEF_VEC_P(breakpoint_p
);
480 /* The following stuff is an abstract data type "bpstat" ("breakpoint
481 status"). This provides the ability to determine whether we have
482 stopped at a breakpoint, and what we should do about it. */
484 typedef struct bpstats
*bpstat
;
486 /* Frees any storage that is part of a bpstat.
487 Does not walk the 'next' chain. */
488 extern void bpstat_free (bpstat
);
490 /* Clears a chain of bpstat, freeing storage
492 extern void bpstat_clear (bpstat
*);
494 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
495 is part of the bpstat is copied as well. */
496 extern bpstat
bpstat_copy (bpstat
);
498 extern bpstat
bpstat_stop_status (CORE_ADDR pc
, ptid_t ptid
);
500 /* This bpstat_what stuff tells wait_for_inferior what to do with a
501 breakpoint (a challenging task). */
503 enum bpstat_what_main_action
505 /* Perform various other tests; that is, this bpstat does not
506 say to perform any action (e.g. failed watchpoint and nothing
508 BPSTAT_WHAT_KEEP_CHECKING
,
510 /* Rather than distinguish between noisy and silent stops here, it
511 might be cleaner to have bpstat_print make that decision (also
512 taking into account stop_print_frame and source_only). But the
513 implications are a bit scary (interaction with auto-displays, etc.),
514 so I won't try it. */
517 BPSTAT_WHAT_STOP_SILENT
,
519 /* Stop and print. */
520 BPSTAT_WHAT_STOP_NOISY
,
522 /* Remove breakpoints, single step once, then put them back in and
523 go back to what we were doing. It's possible that this should be
524 removed from the main_action and put into a separate field, to more
525 cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
528 /* Set longjmp_resume breakpoint, remove all other breakpoints,
529 and continue. The "remove all other breakpoints" part is required
530 if we are also stepping over another breakpoint as well as doing
531 the longjmp handling. */
532 BPSTAT_WHAT_SET_LONGJMP_RESUME
,
534 /* Clear longjmp_resume breakpoint, then handle as
535 BPSTAT_WHAT_KEEP_CHECKING. */
536 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
,
538 /* Clear step resume breakpoint, and keep checking. */
539 BPSTAT_WHAT_STEP_RESUME
,
541 /* Check the dynamic linker's data structures for new libraries, then
543 BPSTAT_WHAT_CHECK_SHLIBS
,
545 /* This is just used to keep track of how many enums there are. */
551 enum bpstat_what_main_action main_action
;
553 /* Did we hit a call dummy breakpoint? This only goes with a main_action
554 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
555 continuing from a call dummy without popping the frame is not a
560 /* The possible return values for print_bpstat, print_it_normal,
561 print_it_done, print_it_noop. */
562 enum print_stop_action
570 /* Tell what to do about this bpstat. */
571 struct bpstat_what
bpstat_what (bpstat
);
573 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
574 bpstat
bpstat_find_breakpoint (bpstat
, struct breakpoint
*);
576 /* Find a step_resume breakpoint associated with this bpstat.
577 (If there are multiple step_resume bp's on the list, this function
578 will arbitrarily pick one.)
580 It is an error to use this function if BPSTAT doesn't contain a
581 step_resume breakpoint.
583 See wait_for_inferior's use of this function.
585 extern struct breakpoint
*bpstat_find_step_resume_breakpoint (bpstat
);
587 /* Nonzero if a signal that we got in wait() was due to circumstances
588 explained by the BS. */
589 /* Currently that is true if we have hit a breakpoint, or if there is
590 a watchpoint enabled. */
591 #define bpstat_explains_signal(bs) ((bs) != NULL)
593 /* Nonzero if we should step constantly (e.g. watchpoints on machines
594 without hardware support). This isn't related to a specific bpstat,
595 just to things like whether watchpoints are set. */
596 extern int bpstat_should_step (void);
598 /* Print a message indicating what happened. Returns nonzero to
599 say that only the source line should be printed after this (zero
600 return means print the frame as well as the source line). */
601 extern enum print_stop_action
bpstat_print (bpstat
);
603 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
604 at. *BSP upon return is a bpstat which points to the remaining
605 breakpoints stopped at (but which is not guaranteed to be good for
606 anything but further calls to bpstat_num).
607 Return 0 if passed a bpstat which does not indicate any breakpoints.
608 Return -1 if stopped at a breakpoint that has been deleted since
610 Return 1 otherwise. */
611 extern int bpstat_num (bpstat
*, int *);
613 /* Perform actions associated with the stopped inferior. Actually, we
614 just use this for breakpoint commands. Perhaps other actions will
615 go here later, but this is executed at a late time (from the
617 extern void bpstat_do_actions (void);
619 /* Modify BS so that the actions will not be performed. */
620 extern void bpstat_clear_actions (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 struct breakpoint
*clone_momentary_breakpoint (struct breakpoint
*bpkt
);
708 extern void set_ignore_count (int, int, int);
710 extern void set_default_breakpoint (int, CORE_ADDR
, struct symtab
*, int);
712 extern void breakpoint_init_inferior (enum inf_context
);
714 extern struct cleanup
*make_cleanup_delete_breakpoint (struct breakpoint
*);
716 extern void delete_breakpoint (struct breakpoint
*);
718 extern void breakpoint_auto_delete (bpstat
);
720 extern void break_command (char *, int);
722 extern void hbreak_command_wrapper (char *, int);
723 extern void thbreak_command_wrapper (char *, int);
724 extern void rbreak_command_wrapper (char *, int);
725 extern void watch_command_wrapper (char *, int);
726 extern void awatch_command_wrapper (char *, int);
727 extern void rwatch_command_wrapper (char *, int);
728 extern void tbreak_command (char *, int);
730 extern void set_breakpoint (char *address
, char *condition
,
731 int hardwareflag
, int tempflag
,
732 int thread
, int ignore_count
,
736 extern void insert_breakpoints (void);
738 extern int remove_breakpoints (void);
740 /* This function can be used to physically insert eventpoints from the
741 specified traced inferior process, without modifying the breakpoint
742 package's state. This can be useful for those targets which support
743 following the processes of a fork() or vfork() system call, when both
744 of the resulting two processes are to be followed. */
745 extern int reattach_breakpoints (int);
747 /* This function can be used to update the breakpoint package's state
748 after an exec() system call has been executed.
750 This function causes the following:
752 - All eventpoints are marked "not inserted".
753 - All eventpoints with a symbolic address are reset such that
754 the symbolic address must be reevaluated before the eventpoints
756 - The solib breakpoints are explicitly removed from the breakpoint
758 - A step-resume breakpoint, if any, is explicitly removed from the
760 - All eventpoints without a symbolic address are removed from the
762 extern void update_breakpoints_after_exec (void);
764 /* This function can be used to physically remove hardware breakpoints
765 and watchpoints from the specified traced inferior process, without
766 modifying the breakpoint package's state. This can be useful for
767 those targets which support following the processes of a fork() or
768 vfork() system call, when one of the resulting two processes is to
769 be detached and allowed to run free.
771 It is an error to use this function on the process whose id is
773 extern int detach_breakpoints (int);
775 extern void set_longjmp_breakpoint (int thread
);
776 extern void delete_longjmp_breakpoint (int thread
);
778 extern void enable_overlay_breakpoints (void);
779 extern void disable_overlay_breakpoints (void);
781 /* These functions respectively disable or reenable all currently
782 enabled watchpoints. When disabled, the watchpoints are marked
783 call_disabled. When reenabled, they are marked enabled.
785 The intended client of these functions is call_function_by_hand.
787 The inferior must be stopped, and all breakpoints removed, when
788 these functions are used.
790 The need for these functions is that on some targets (e.g., HP-UX),
791 gdb is unable to unwind through the dummy frame that is pushed as
792 part of the implementation of a call command. Watchpoints can
793 cause the inferior to stop in places where this frame is visible,
794 and that can cause execution control to become very confused.
796 Note that if a user sets breakpoints in an interactively called
797 function, the call_disabled watchpoints will have been reenabled
798 when the first such breakpoint is reached. However, on targets
799 that are unable to unwind through the call dummy frame, watches
800 of stack-based storage may then be deleted, because gdb will
801 believe that their watched storage is out of scope. (Sigh.) */
802 extern void disable_watchpoints_before_interactive_call_start (void);
804 extern void enable_watchpoints_after_interactive_call_stop (void);
806 /* For script interpreters that need to define breakpoint commands
807 after they've already read the commands into a struct command_line. */
808 extern enum command_control_type commands_from_control_command
809 (char *arg
, struct command_line
*cmd
);
811 extern void clear_breakpoint_hit_counts (void);
813 extern int get_number (char **);
815 extern int get_number_or_range (char **);
817 /* The following are for displays, which aren't really breakpoints, but
818 here is as good a place as any for them. */
820 extern void disable_current_display (void);
822 extern void do_displays (void);
824 extern void disable_display (int);
826 extern void clear_displays (void);
828 extern void disable_breakpoint (struct breakpoint
*);
830 extern void enable_breakpoint (struct breakpoint
*);
832 /* Clear the "inserted" flag in all breakpoints. */
833 extern void mark_breakpoints_out (void);
835 extern void make_breakpoint_permanent (struct breakpoint
*);
837 extern struct breakpoint
*create_solib_event_breakpoint (CORE_ADDR
);
839 extern struct breakpoint
*create_thread_event_breakpoint (CORE_ADDR
);
841 extern void remove_solib_event_breakpoints (void);
843 extern void remove_thread_event_breakpoints (void);
845 extern void disable_breakpoints_in_shlibs (void);
847 /* This function returns TRUE if ep is a catchpoint. */
848 extern int ep_is_catchpoint (struct breakpoint
*);
850 /* Enable breakpoints and delete when hit. Called with ARG == NULL
851 deletes all breakpoints. */
852 extern void delete_command (char *arg
, int from_tty
);
854 /* Pull all H/W watchpoints from the target. Return non-zero if the
856 extern int remove_hw_watchpoints (void);
858 /* Manage a software single step breakpoint (or two). Insert may be called
859 twice before remove is called. */
860 extern void insert_single_step_breakpoint (CORE_ADDR
);
861 extern void remove_single_step_breakpoints (void);
863 /* Manage manual breakpoints, separate from the normal chain of
864 breakpoints. These functions are used in murky target-specific
865 ways. Please do not add more uses! */
866 extern void *deprecated_insert_raw_breakpoint (CORE_ADDR
);
867 extern int deprecated_remove_raw_breakpoint (void *);
869 /* Check if any hardware watchpoints have triggered, according to the
871 int watchpoints_triggered (struct target_waitstatus
*);
873 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
874 by replacing any memory breakpoints with their shadowed contents. */
875 void breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
,
878 extern int breakpoints_always_inserted_mode (void);
880 /* Called each time new event from target is processed.
881 Retires previously deleted breakpoint locations that
882 in our opinion won't ever trigger. */
883 extern void breakpoint_retire_moribund (void);
885 /* Tell a breakpoint to be quiet. */
886 extern void make_breakpoint_silent (struct breakpoint
*);
888 /* Return a tracepoint with the given number if found. */
889 extern struct breakpoint
*get_tracepoint (int num
);
891 /* Find a tracepoint by parsing a number in the supplied string. */
892 extern struct breakpoint
*get_tracepoint_by_number (char **arg
, int multi_p
,
895 /* Return a vector of all tracepoints currently defined. The vector
896 is newly allocated; the caller should free when done with it. */
897 extern VEC(breakpoint_p
) *all_tracepoints (void);
899 #endif /* !defined (BREAKPOINT_H) */