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. */
124 /* Event for JIT compiled code generation or deletion. */
128 /* States of enablement of breakpoint. */
132 bp_disabled
, /* The eventpoint is inactive, and cannot trigger. */
133 bp_enabled
, /* The eventpoint is active, and can trigger. */
134 bp_call_disabled
, /* The eventpoint has been disabled while a call
135 into the inferior is "in flight", because some
136 eventpoints interfere with the implementation of
137 a call on some targets. The eventpoint will be
138 automatically enabled and reset when the call
139 "lands" (either completes, or stops at another
141 bp_startup_disabled
,/* The eventpoint has been disabled during inferior
142 startup. This is necessary on some targets where
143 the main executable will get relocated during
144 startup, making breakpoint addresses invalid.
145 The eventpoint will be automatically enabled and
146 reset once inferior startup is complete. */
147 bp_permanent
/* There is a breakpoint instruction hard-wired into
148 the target's code. Don't try to write another
149 breakpoint instruction on top of it, or restore
150 its value. Step over it using the architecture's
155 /* Disposition of breakpoint. Ie: what to do after hitting it. */
159 disp_del
, /* Delete it */
160 disp_del_at_next_stop
, /* Delete at next stop, whether hit or not */
161 disp_disable
, /* Disable it */
162 disp_donttouch
/* Leave it alone */
165 enum target_hw_bp_type
167 hw_write
= 0, /* Common HW watchpoint */
168 hw_read
= 1, /* Read HW watchpoint */
169 hw_access
= 2, /* Access HW watchpoint */
170 hw_execute
= 3 /* Execute HW breakpoint */
174 /* Information used by targets to insert and remove breakpoints. */
176 struct bp_target_info
178 /* Address at which the breakpoint was placed. This is normally the
179 same as ADDRESS from the bp_location, except when adjustment
180 happens in gdbarch_breakpoint_from_pc. The most common form of
181 adjustment is stripping an alternate ISA marker from the PC which
182 is used to determine the type of breakpoint to insert. */
183 CORE_ADDR placed_address
;
185 /* If the breakpoint lives in memory and reading that memory would
186 give back the breakpoint, instead of the original contents, then
187 the original contents are cached here. Only SHADOW_LEN bytes of
188 this buffer are valid, and only when the breakpoint is inserted. */
189 gdb_byte shadow_contents
[BREAKPOINT_MAX
];
191 /* The length of the data cached in SHADOW_CONTENTS. */
194 /* The size of the placed breakpoint, according to
195 gdbarch_breakpoint_from_pc, when the breakpoint was inserted. This is
196 generally the same as SHADOW_LEN, unless we did not need
197 to read from the target to implement the memory breakpoint
198 (e.g. if a remote stub handled the details). We may still
199 need the size to remove the breakpoint safely. */
203 /* GDB maintains two types of information about each breakpoint (or
204 watchpoint, or other related event). The first type corresponds
205 to struct breakpoint; this is a relatively high-level structure
206 which contains the source location(s), stopping conditions, user
207 commands to execute when the breakpoint is hit, and so forth.
209 The second type of information corresponds to struct bp_location.
210 Each breakpoint has one or (eventually) more locations associated
211 with it, which represent target-specific and machine-specific
212 mechanisms for stopping the program. For instance, a watchpoint
213 expression may require multiple hardware watchpoints in order to
214 catch all changes in the value of the expression being watched. */
218 bp_loc_software_breakpoint
,
219 bp_loc_hardware_breakpoint
,
220 bp_loc_hardware_watchpoint
,
221 bp_loc_other
/* Miscellaneous... */
226 /* Chain pointer to the next breakpoint location for
227 the same parent breakpoint. */
228 struct bp_location
*next
;
230 /* Pointer to the next breakpoint location, in a global
231 list of all breakpoint locations. */
232 struct bp_location
*global_next
;
234 /* Type of this breakpoint location. */
235 enum bp_loc_type loc_type
;
237 /* Each breakpoint location must belong to exactly one higher-level
238 breakpoint. This and the DUPLICATE flag are more straightforward
239 than reference counting. */
240 struct breakpoint
*owner
;
242 /* Conditional. Break only if this expression's value is nonzero.
243 Unlike string form of condition, which is associated with breakpoint,
244 this is associated with location, since if breakpoint has several
245 locations, the evaluation of expression can be different for
246 different locations. */
247 struct expression
*cond
;
249 /* This location's address is in an unloaded solib, and so this
250 location should not be inserted. It will be automatically
251 enabled when that solib is loaded. */
254 /* Is this particular location enabled. */
257 /* Nonzero if this breakpoint is now inserted. */
260 /* Nonzero if this is not the first breakpoint in the list
261 for the given address. */
264 /* If we someday support real thread-specific breakpoints, then
265 the breakpoint location will need a thread identifier. */
267 /* Data for specific breakpoint types. These could be a union, but
268 simplicity is more important than memory usage for breakpoints. */
270 /* Architecture associated with this location's address. May be
271 different from the breakpoint architecture. */
272 struct gdbarch
*gdbarch
;
274 /* Note that zero is a perfectly valid code address on some platforms
275 (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
276 is not a special value for this field. Valid for all types except
280 /* For hardware watchpoints, the size of data ad ADDRESS being watches. */
283 /* Type of hardware watchpoint. */
284 enum target_hw_bp_type watchpoint_type
;
286 /* For any breakpoint type with an address, this is the section
287 associated with the address. Used primarily for overlay debugging. */
288 struct obj_section
*section
;
290 /* Address at which breakpoint was requested, either by the user or
291 by GDB for internal breakpoints. This will usually be the same
292 as ``address'' (above) except for cases in which
293 ADJUST_BREAKPOINT_ADDRESS has computed a different address at
294 which to place the breakpoint in order to comply with a
295 processor's architectual constraints. */
296 CORE_ADDR requested_address
;
300 /* Details of the placed breakpoint, when inserted. */
301 struct bp_target_info target_info
;
303 /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
304 struct bp_target_info overlay_target_info
;
306 /* In a non-stop mode, it's possible that we delete a breakpoint,
307 but as we do that, some still running thread hits that breakpoint.
308 For that reason, we need to keep locations belonging to deleted
309 breakpoints for a bit, so that don't report unexpected SIGTRAP.
310 We can't keep such locations forever, so we use a heuristic --
311 after we process certain number of inferior events since
312 breakpoint was deleted, we retire all locations of that breakpoint.
313 This variable keeps a number of events still to go, when
314 it becomes 0 this location is retired. */
315 int events_till_retirement
;
318 /* This structure is a collection of function pointers that, if available,
319 will be called instead of the performing the default action for this
322 struct breakpoint_ops
324 /* Insert the breakpoint or activate the catchpoint. Should raise
325 an exception if the operation failed. */
326 void (*insert
) (struct breakpoint
*);
328 /* Remove the breakpoint/catchpoint that was previously inserted
329 with the "insert" method above. Return non-zero if the operation
331 int (*remove
) (struct breakpoint
*);
333 /* Return non-zero if the debugger should tell the user that this
334 breakpoint was hit. */
335 int (*breakpoint_hit
) (struct breakpoint
*);
337 /* The normal print routine for this breakpoint, called when we
339 enum print_stop_action (*print_it
) (struct breakpoint
*);
341 /* Display information about this breakpoint, for "info breakpoints". */
342 void (*print_one
) (struct breakpoint
*, struct bp_location
**);
344 /* Display information about this breakpoint after setting it (roughly
345 speaking; this is called from "mention"). */
346 void (*print_mention
) (struct breakpoint
*);
349 enum watchpoint_triggered
351 /* This watchpoint definitely did not trigger. */
352 watch_triggered_no
= 0,
354 /* Some hardware watchpoint triggered, and it might have been this
355 one, but we do not know which it was. */
356 watch_triggered_unknown
,
358 /* This hardware watchpoint definitely did trigger. */
362 typedef struct bp_location
*bp_location_p
;
363 DEF_VEC_P(bp_location_p
);
365 /* Note that the ->silent field is not currently used by any commands
366 (though the code is in there if it was to be, and set_raw_breakpoint
367 does set it to 0). I implemented it because I thought it would be
368 useful for a hack I had to put in; I'm going to leave it in because
369 I can see how there might be times when it would indeed be useful */
371 /* This is for a breakpoint or a watchpoint. */
375 struct breakpoint
*next
;
376 /* Type of breakpoint. */
378 /* Zero means disabled; remember the info but don't break here. */
379 enum enable_state enable_state
;
380 /* What to do with this breakpoint after we hit it. */
381 enum bpdisp disposition
;
382 /* Number assigned to distinguish breakpoints. */
385 /* Location(s) associated with this high-level breakpoint. */
386 struct bp_location
*loc
;
388 /* Line number of this address. */
392 /* Source file name of this address. */
396 /* Non-zero means a silent breakpoint (don't print frame info
398 unsigned char silent
;
399 /* Number of stops at this breakpoint that should
400 be continued automatically before really stopping. */
402 /* Chain of command lines to execute when this breakpoint is hit. */
403 struct command_line
*commands
;
404 /* Stack depth (address of frame). If nonzero, break only if fp
406 struct frame_id frame_id
;
408 /* String we used to set the breakpoint (malloc'd). */
410 /* Architecture we used to set the breakpoint. */
411 struct gdbarch
*gdbarch
;
412 /* Language we used to set the breakpoint. */
413 enum language language
;
414 /* Input radix we used to set the breakpoint. */
416 /* String form of the breakpoint condition (malloc'd), or NULL if there
419 /* String form of exp (malloc'd), or NULL if none. */
422 /* The expression we are watching, or NULL if not a watchpoint. */
423 struct expression
*exp
;
424 /* The largest block within which it is valid, or NULL if it is
425 valid anywhere (e.g. consists just of global symbols). */
426 struct block
*exp_valid_block
;
427 /* Value of the watchpoint the last time we checked it, or NULL
428 when we do not know the value yet or the value was not
429 readable. VAL is never lazy. */
431 /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
432 then an error occurred reading the value. */
435 /* Holds the address of the related watchpoint_scope breakpoint
436 when using watchpoints on local variables (might the concept
437 of a related breakpoint be useful elsewhere, if not just call
438 it the watchpoint_scope breakpoint or something like that. FIXME). */
439 struct breakpoint
*related_breakpoint
;
441 /* Holds the frame address which identifies the frame this
442 watchpoint should be evaluated in, or `null' if the watchpoint
443 should be evaluated on the outermost frame. */
444 struct frame_id watchpoint_frame
;
446 /* For hardware watchpoints, the triggered status according to the
448 enum watchpoint_triggered watchpoint_triggered
;
450 /* Thread number for thread-specific breakpoint, or -1 if don't care. */
453 /* Ada task number for task-specific breakpoint, or 0 if don't care. */
456 /* Count of the number of times this breakpoint was taken, dumped
457 with the info, but not used for anything else. Useful for
458 seeing how many times you hit a break prior to the program
459 aborting, so you can back up to just before the abort. */
462 /* Process id of a child process whose forking triggered this
463 catchpoint. This field is only valid immediately after this
464 catchpoint has triggered. */
465 ptid_t forked_inferior_pid
;
467 /* Filename of a program whose exec triggered this catchpoint.
468 This field is only valid immediately after this catchpoint has
472 /* Methods associated with this breakpoint. */
473 struct breakpoint_ops
*ops
;
475 /* Is breakpoint's condition not yet parsed because we found
476 no location initially so had no context to parse
478 int condition_not_parsed
;
480 /* Number of times this tracepoint should single-step
481 and collect additional data. */
484 /* Number of times this tracepoint should be hit before
488 /* Chain of action lines to execute when this tracepoint is hit. */
489 struct action_line
*actions
;
492 typedef struct breakpoint
*breakpoint_p
;
493 DEF_VEC_P(breakpoint_p
);
495 /* The following stuff is an abstract data type "bpstat" ("breakpoint
496 status"). This provides the ability to determine whether we have
497 stopped at a breakpoint, and what we should do about it. */
499 typedef struct bpstats
*bpstat
;
501 /* Frees any storage that is part of a bpstat.
502 Does not walk the 'next' chain. */
503 extern void bpstat_free (bpstat
);
505 /* Clears a chain of bpstat, freeing storage
507 extern void bpstat_clear (bpstat
*);
509 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
510 is part of the bpstat is copied as well. */
511 extern bpstat
bpstat_copy (bpstat
);
513 extern bpstat
bpstat_stop_status (CORE_ADDR pc
, ptid_t ptid
);
515 /* This bpstat_what stuff tells wait_for_inferior what to do with a
516 breakpoint (a challenging task). */
518 enum bpstat_what_main_action
520 /* Perform various other tests; that is, this bpstat does not
521 say to perform any action (e.g. failed watchpoint and nothing
523 BPSTAT_WHAT_KEEP_CHECKING
,
525 /* Rather than distinguish between noisy and silent stops here, it
526 might be cleaner to have bpstat_print make that decision (also
527 taking into account stop_print_frame and source_only). But the
528 implications are a bit scary (interaction with auto-displays, etc.),
529 so I won't try it. */
532 BPSTAT_WHAT_STOP_SILENT
,
534 /* Stop and print. */
535 BPSTAT_WHAT_STOP_NOISY
,
537 /* Remove breakpoints, single step once, then put them back in and
538 go back to what we were doing. It's possible that this should be
539 removed from the main_action and put into a separate field, to more
540 cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
543 /* Set longjmp_resume breakpoint, remove all other breakpoints,
544 and continue. The "remove all other breakpoints" part is required
545 if we are also stepping over another breakpoint as well as doing
546 the longjmp handling. */
547 BPSTAT_WHAT_SET_LONGJMP_RESUME
,
549 /* Clear longjmp_resume breakpoint, then handle as
550 BPSTAT_WHAT_KEEP_CHECKING. */
551 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
,
553 /* Clear step resume breakpoint, and keep checking. */
554 BPSTAT_WHAT_STEP_RESUME
,
556 /* Check the dynamic linker's data structures for new libraries, then
558 BPSTAT_WHAT_CHECK_SHLIBS
,
560 /* Check for new JITed code. */
561 BPSTAT_WHAT_CHECK_JIT
,
563 /* This is just used to keep track of how many enums there are. */
569 enum bpstat_what_main_action main_action
;
571 /* Did we hit a call dummy breakpoint? This only goes with a main_action
572 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
573 continuing from a call dummy without popping the frame is not a
578 /* The possible return values for print_bpstat, print_it_normal,
579 print_it_done, print_it_noop. */
580 enum print_stop_action
588 /* Tell what to do about this bpstat. */
589 struct bpstat_what
bpstat_what (bpstat
);
591 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
592 bpstat
bpstat_find_breakpoint (bpstat
, struct breakpoint
*);
594 /* Find a step_resume breakpoint associated with this bpstat.
595 (If there are multiple step_resume bp's on the list, this function
596 will arbitrarily pick one.)
598 It is an error to use this function if BPSTAT doesn't contain a
599 step_resume breakpoint.
601 See wait_for_inferior's use of this function.
603 extern struct breakpoint
*bpstat_find_step_resume_breakpoint (bpstat
);
605 /* Nonzero if a signal that we got in wait() was due to circumstances
606 explained by the BS. */
607 /* Currently that is true if we have hit a breakpoint, or if there is
608 a watchpoint enabled. */
609 #define bpstat_explains_signal(bs) ((bs) != NULL)
611 /* Nonzero if we should step constantly (e.g. watchpoints on machines
612 without hardware support). This isn't related to a specific bpstat,
613 just to things like whether watchpoints are set. */
614 extern int bpstat_should_step (void);
616 /* Print a message indicating what happened. Returns nonzero to
617 say that only the source line should be printed after this (zero
618 return means print the frame as well as the source line). */
619 extern enum print_stop_action
bpstat_print (bpstat
);
621 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
622 at. *BSP upon return is a bpstat which points to the remaining
623 breakpoints stopped at (but which is not guaranteed to be good for
624 anything but further calls to bpstat_num).
625 Return 0 if passed a bpstat which does not indicate any breakpoints.
626 Return -1 if stopped at a breakpoint that has been deleted since
628 Return 1 otherwise. */
629 extern int bpstat_num (bpstat
*, int *);
631 /* Perform actions associated with the stopped inferior. Actually, we
632 just use this for breakpoint commands. Perhaps other actions will
633 go here later, but this is executed at a late time (from the
635 extern void bpstat_do_actions (void);
637 /* Modify BS so that the actions will not be performed. */
638 extern void bpstat_clear_actions (bpstat
);
640 /* Implementation: */
642 /* Values used to tell the printing routine how to behave for this bpstat. */
645 /* This is used when we want to do a normal printing of the reason
646 for stopping. The output will depend on the type of eventpoint
647 we are dealing with. This is the default value, most commonly
650 /* This is used when nothing should be printed for this bpstat entry. */
652 /* This is used when everything which needs to be printed has
653 already been printed. But we still want to print the frame. */
659 /* Linked list because there can be two breakpoints at the same
660 place, and a bpstat reflects the fact that both have been hit. */
662 /* Breakpoint that we are at. */
663 const struct bp_location
*breakpoint_at
;
664 /* Commands left to be done. */
665 struct command_line
*commands
;
666 /* Old value associated with a watchpoint. */
667 struct value
*old_val
;
669 /* Nonzero if this breakpoint tells us to print the frame. */
672 /* Nonzero if this breakpoint tells us to stop. */
675 /* Tell bpstat_print and print_bp_stop_message how to print stuff
676 associated with this element of the bpstat chain. */
677 enum bp_print_how print_it
;
688 /* The possible return values for breakpoint_here_p.
689 We guarantee that zero always means "no breakpoint here". */
692 no_breakpoint_here
= 0,
693 ordinary_breakpoint_here
,
694 permanent_breakpoint_here
698 /* Prototypes for breakpoint-related functions. */
700 extern enum breakpoint_here
breakpoint_here_p (CORE_ADDR
);
702 extern int moribund_breakpoint_here_p (CORE_ADDR
);
704 extern int breakpoint_inserted_here_p (CORE_ADDR
);
706 extern int regular_breakpoint_inserted_here_p (CORE_ADDR
);
708 extern int software_breakpoint_inserted_here_p (CORE_ADDR
);
710 extern int breakpoint_thread_match (CORE_ADDR
, ptid_t
);
712 extern void until_break_command (char *, int, int);
714 extern void breakpoint_re_set (void);
716 extern void breakpoint_re_set_thread (struct breakpoint
*);
718 extern struct breakpoint
*set_momentary_breakpoint
719 (struct gdbarch
*, struct symtab_and_line
, struct frame_id
, enum bptype
);
721 extern struct breakpoint
*set_momentary_breakpoint_at_pc
722 (struct gdbarch
*, CORE_ADDR pc
, enum bptype type
);
724 extern struct breakpoint
*clone_momentary_breakpoint (struct breakpoint
*bpkt
);
726 extern void set_ignore_count (int, int, int);
728 extern void set_default_breakpoint (int, CORE_ADDR
, struct symtab
*, int);
730 extern void breakpoint_init_inferior (enum inf_context
);
732 extern struct cleanup
*make_cleanup_delete_breakpoint (struct breakpoint
*);
734 extern void delete_breakpoint (struct breakpoint
*);
736 extern void breakpoint_auto_delete (bpstat
);
738 extern void break_command (char *, int);
740 extern void hbreak_command_wrapper (char *, int);
741 extern void thbreak_command_wrapper (char *, int);
742 extern void rbreak_command_wrapper (char *, int);
743 extern void watch_command_wrapper (char *, int);
744 extern void awatch_command_wrapper (char *, int);
745 extern void rwatch_command_wrapper (char *, int);
746 extern void tbreak_command (char *, int);
748 extern void set_breakpoint (struct gdbarch
*gdbarch
,
749 char *address
, char *condition
,
750 int hardwareflag
, int tempflag
,
751 int thread
, int ignore_count
,
755 extern void insert_breakpoints (void);
757 extern int remove_breakpoints (void);
759 /* This function can be used to physically insert eventpoints from the
760 specified traced inferior process, without modifying the breakpoint
761 package's state. This can be useful for those targets which support
762 following the processes of a fork() or vfork() system call, when both
763 of the resulting two processes are to be followed. */
764 extern int reattach_breakpoints (int);
766 /* This function can be used to update the breakpoint package's state
767 after an exec() system call has been executed.
769 This function causes the following:
771 - All eventpoints are marked "not inserted".
772 - All eventpoints with a symbolic address are reset such that
773 the symbolic address must be reevaluated before the eventpoints
775 - The solib breakpoints are explicitly removed from the breakpoint
777 - A step-resume breakpoint, if any, is explicitly removed from the
779 - All eventpoints without a symbolic address are removed from the
781 extern void update_breakpoints_after_exec (void);
783 /* This function can be used to physically remove hardware breakpoints
784 and watchpoints from the specified traced inferior process, without
785 modifying the breakpoint package's state. This can be useful for
786 those targets which support following the processes of a fork() or
787 vfork() system call, when one of the resulting two processes is to
788 be detached and allowed to run free.
790 It is an error to use this function on the process whose id is
792 extern int detach_breakpoints (int);
794 extern void set_longjmp_breakpoint (int thread
);
795 extern void delete_longjmp_breakpoint (int thread
);
797 extern void enable_overlay_breakpoints (void);
798 extern void disable_overlay_breakpoints (void);
800 /* These functions respectively disable or reenable all currently
801 enabled watchpoints. When disabled, the watchpoints are marked
802 call_disabled. When reenabled, they are marked enabled.
804 The intended client of these functions is call_function_by_hand.
806 The inferior must be stopped, and all breakpoints removed, when
807 these functions are used.
809 The need for these functions is that on some targets (e.g., HP-UX),
810 gdb is unable to unwind through the dummy frame that is pushed as
811 part of the implementation of a call command. Watchpoints can
812 cause the inferior to stop in places where this frame is visible,
813 and that can cause execution control to become very confused.
815 Note that if a user sets breakpoints in an interactively called
816 function, the call_disabled watchpoints will have been reenabled
817 when the first such breakpoint is reached. However, on targets
818 that are unable to unwind through the call dummy frame, watches
819 of stack-based storage may then be deleted, because gdb will
820 believe that their watched storage is out of scope. (Sigh.) */
821 extern void disable_watchpoints_before_interactive_call_start (void);
823 extern void enable_watchpoints_after_interactive_call_stop (void);
825 /* These functions disable and re-enable all breakpoints during
826 inferior startup. They are intended to be called from solib
827 code where necessary. This is needed on platforms where the
828 main executable is relocated at some point during startup
829 processing, making breakpoint addresses invalid.
831 If additional breakpoints are created after the routine
832 disable_breakpoints_before_startup but before the routine
833 enable_breakpoints_after_startup was called, they will also
834 be marked as disabled. */
835 extern void disable_breakpoints_before_startup (void);
836 extern void enable_breakpoints_after_startup (void);
838 /* For script interpreters that need to define breakpoint commands
839 after they've already read the commands into a struct command_line. */
840 extern enum command_control_type commands_from_control_command
841 (char *arg
, struct command_line
*cmd
);
843 extern void clear_breakpoint_hit_counts (void);
845 extern int get_number (char **);
847 extern int get_number_or_range (char **);
849 extern struct breakpoint
*get_breakpoint (int num
);
851 /* The following are for displays, which aren't really breakpoints, but
852 here is as good a place as any for them. */
854 extern void disable_current_display (void);
856 extern void do_displays (void);
858 extern void disable_display (int);
860 extern void clear_displays (void);
862 extern void disable_breakpoint (struct breakpoint
*);
864 extern void enable_breakpoint (struct breakpoint
*);
866 extern void breakpoint_set_commands (struct breakpoint
*b
,
867 struct command_line
*commands
);
869 /* Clear the "inserted" flag in all breakpoints. */
870 extern void mark_breakpoints_out (void);
872 extern void make_breakpoint_permanent (struct breakpoint
*);
874 extern struct breakpoint
*create_jit_event_breakpoint (struct gdbarch
*,
877 extern struct breakpoint
*create_solib_event_breakpoint (struct gdbarch
*,
880 extern struct breakpoint
*create_thread_event_breakpoint (struct gdbarch
*,
883 extern void remove_solib_event_breakpoints (void);
885 extern void remove_thread_event_breakpoints (void);
887 extern void disable_breakpoints_in_shlibs (void);
889 /* This function returns TRUE if ep is a catchpoint. */
890 extern int ep_is_catchpoint (struct breakpoint
*);
892 /* Enable breakpoints and delete when hit. Called with ARG == NULL
893 deletes all breakpoints. */
894 extern void delete_command (char *arg
, int from_tty
);
896 /* Pull all H/W watchpoints from the target. Return non-zero if the
898 extern int remove_hw_watchpoints (void);
900 /* Manage a software single step breakpoint (or two). Insert may be called
901 twice before remove is called. */
902 extern void insert_single_step_breakpoint (struct gdbarch
*, CORE_ADDR
);
903 extern void remove_single_step_breakpoints (void);
905 /* Manage manual breakpoints, separate from the normal chain of
906 breakpoints. These functions are used in murky target-specific
907 ways. Please do not add more uses! */
908 extern void *deprecated_insert_raw_breakpoint (struct gdbarch
*, CORE_ADDR
);
909 extern int deprecated_remove_raw_breakpoint (struct gdbarch
*, void *);
911 /* Check if any hardware watchpoints have triggered, according to the
913 int watchpoints_triggered (struct target_waitstatus
*);
915 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
916 by replacing any memory breakpoints with their shadowed contents. */
917 void breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
,
920 extern int breakpoints_always_inserted_mode (void);
922 /* Called each time new event from target is processed.
923 Retires previously deleted breakpoint locations that
924 in our opinion won't ever trigger. */
925 extern void breakpoint_retire_moribund (void);
927 /* Tell a breakpoint to be quiet. */
928 extern void make_breakpoint_silent (struct breakpoint
*);
930 /* Return a tracepoint with the given number if found. */
931 extern struct breakpoint
*get_tracepoint (int num
);
933 /* Find a tracepoint by parsing a number in the supplied string. */
934 extern struct breakpoint
*get_tracepoint_by_number (char **arg
, int multi_p
,
937 /* Return a vector of all tracepoints currently defined. The vector
938 is newly allocated; the caller should free when done with it. */
939 extern VEC(breakpoint_p
) *all_tracepoints (void);
941 #endif /* !defined (BREAKPOINT_H) */