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
27 #include "gdb-events.h"
32 /* This is the maximum number of bytes a breakpoint instruction can take.
33 Feel free to increase it. It's just used in a few places to size
34 arrays that should be independent of the target architecture. */
36 #define BREAKPOINT_MAX 16
38 /* Type of breakpoint. */
39 /* FIXME In the future, we should fold all other breakpoint-like things into
42 * single-step (for machines where we have to simulate single stepping)
43 (probably, though perhaps it is better for it to look as much as
44 possible like a single-step to wait_for_inferior). */
48 bp_none
= 0, /* Eventpoint has been deleted. */
49 bp_breakpoint
, /* Normal breakpoint */
50 bp_hardware_breakpoint
, /* Hardware assisted breakpoint */
51 bp_until
, /* used by until command */
52 bp_finish
, /* used by finish command */
53 bp_watchpoint
, /* Watchpoint */
54 bp_hardware_watchpoint
, /* Hardware assisted watchpoint */
55 bp_read_watchpoint
, /* read watchpoint, (hardware assisted) */
56 bp_access_watchpoint
, /* access watchpoint, (hardware assisted) */
57 bp_longjmp
, /* secret breakpoint to find longjmp() */
58 bp_longjmp_resume
, /* secret breakpoint to escape longjmp() */
60 /* Used by wait_for_inferior for stepping over subroutine calls, for
61 stepping over signal handlers, and for skipping prologues. */
64 /* Used to detect when a watchpoint expression has gone out of
65 scope. These breakpoints are usually not visible to the user.
67 This breakpoint has some interesting properties:
69 1) There's always a 1:1 mapping between watchpoints
70 on local variables and watchpoint_scope breakpoints.
72 2) It automatically deletes itself and the watchpoint it's
73 associated with when hit.
75 3) It can never be disabled. */
78 /* The breakpoint at the end of a call dummy. */
79 /* FIXME: What if the function we are calling longjmp()s out of the
80 call, or the user gets out with the "return" command? We currently
81 have no way of cleaning up the breakpoint in these (obscure) situations.
82 (Probably can solve this by noticing longjmp, "return", etc., it's
83 similar to noticing when a watchpoint on a local variable goes out
84 of scope (with hardware support for watchpoints)). */
87 /* Some dynamic linkers (HP, maybe Solaris) can arrange for special
88 code in the inferior to run when significant events occur in the
89 dynamic linker (for example a library is loaded or unloaded).
91 By placing a breakpoint in this magic code GDB will get control
92 when these significant events occur. GDB can then re-examine
93 the dynamic linker's data structures to discover any newly loaded
97 /* Some multi-threaded systems can arrange for a location in the
98 inferior to be executed when certain thread-related events occur
99 (such as thread creation or thread death).
101 By placing a breakpoint at one of these locations, GDB will get
102 control when these events occur. GDB can then update its thread
107 /* On the same principal, an overlay manager can arrange to call a
108 magic location in the inferior whenever there is an interesting
109 change in overlay status. GDB can update its overlay tables
110 and fiddle with breakpoints in overlays when this breakpoint
115 /* These breakpoints are used to implement the "catch load" command
116 on platforms whose dynamic linkers support such functionality. */
119 /* These breakpoints are used to implement the "catch unload" command
120 on platforms whose dynamic linkers support such functionality. */
123 /* These are not really breakpoints, but are catchpoints that
124 implement the "catch fork", "catch vfork" and "catch exec" commands
125 on platforms whose kernel support such functionality. (I.e.,
126 kernels which can raise an event when a fork or exec occurs, as
127 opposed to the debugger setting breakpoints on functions named
128 "fork" or "exec".) */
134 /* States of enablement of breakpoint. */
138 bp_disabled
, /* The eventpoint is inactive, and cannot trigger. */
139 bp_enabled
, /* The eventpoint is active, and can trigger. */
140 bp_call_disabled
, /* The eventpoint has been disabled while a call
141 into the inferior is "in flight", because some
142 eventpoints interfere with the implementation of
143 a call on some targets. The eventpoint will be
144 automatically enabled and reset when the call
145 "lands" (either completes, or stops at another
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 /* Note that zero is a perfectly valid code address on some platforms
271 (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
272 is not a special value for this field. Valid for all types except
276 /* For hardware watchpoints, the size of data ad ADDRESS being watches. */
279 /* Type of hardware watchpoint. */
280 enum target_hw_bp_type watchpoint_type
;
282 /* For any breakpoint type with an address, this is the BFD section
283 associated with the address. Used primarily for overlay debugging. */
286 /* Address at which breakpoint was requested, either by the user or
287 by GDB for internal breakpoints. This will usually be the same
288 as ``address'' (above) except for cases in which
289 ADJUST_BREAKPOINT_ADDRESS has computed a different address at
290 which to place the breakpoint in order to comply with a
291 processor's architectual constraints. */
292 CORE_ADDR requested_address
;
296 /* Details of the placed breakpoint, when inserted. */
297 struct bp_target_info target_info
;
299 /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
300 struct bp_target_info overlay_target_info
;
302 /* In a non-stop mode, it's possible that we delete a breakpoint,
303 but as we do that, some still running thread hits that breakpoint.
304 For that reason, we need to keep locations belonging to deleted
305 breakpoints for a bit, so that don't report unexpected SIGTRAP.
306 We can't keep such locations forever, so we use a heuristic --
307 after we process certain number of inferior events since
308 breakpoint was deleted, we retire all locations of that breakpoint.
309 This variable keeps a number of events still to go, when
310 it becomes 0 this location is retired. */
311 int events_till_retirement
;
314 /* This structure is a collection of function pointers that, if available,
315 will be called instead of the performing the default action for this
318 struct breakpoint_ops
320 /* The normal print routine for this breakpoint, called when we
322 enum print_stop_action (*print_it
) (struct breakpoint
*);
324 /* Display information about this breakpoint, for "info breakpoints". */
325 void (*print_one
) (struct breakpoint
*, CORE_ADDR
*);
327 /* Display information about this breakpoint after setting it (roughly
328 speaking; this is called from "mention"). */
329 void (*print_mention
) (struct breakpoint
*);
332 enum watchpoint_triggered
334 /* This watchpoint definitely did not trigger. */
335 watch_triggered_no
= 0,
337 /* Some hardware watchpoint triggered, and it might have been this
338 one, but we do not know which it was. */
339 watch_triggered_unknown
,
341 /* This hardware watchpoint definitely did trigger. */
345 typedef struct bp_location
*bp_location_p
;
346 DEF_VEC_P(bp_location_p
);
348 /* Note that the ->silent field is not currently used by any commands
349 (though the code is in there if it was to be, and set_raw_breakpoint
350 does set it to 0). I implemented it because I thought it would be
351 useful for a hack I had to put in; I'm going to leave it in because
352 I can see how there might be times when it would indeed be useful */
354 /* This is for a breakpoint or a watchpoint. */
358 struct breakpoint
*next
;
359 /* Type of breakpoint. */
361 /* Zero means disabled; remember the info but don't break here. */
362 enum enable_state enable_state
;
363 /* What to do with this breakpoint after we hit it. */
364 enum bpdisp disposition
;
365 /* Number assigned to distinguish breakpoints. */
368 /* Location(s) associated with this high-level breakpoint. */
369 struct bp_location
*loc
;
371 /* Line number of this address. */
375 /* Source file name of this address. */
379 /* Non-zero means a silent breakpoint (don't print frame info
381 unsigned char silent
;
382 /* Number of stops at this breakpoint that should
383 be continued automatically before really stopping. */
385 /* Chain of command lines to execute when this breakpoint is hit. */
386 struct command_line
*commands
;
387 /* Stack depth (address of frame). If nonzero, break only if fp
389 struct frame_id frame_id
;
391 /* String we used to set the breakpoint (malloc'd). */
393 /* Language we used to set the breakpoint. */
394 enum language language
;
395 /* Input radix we used to set the breakpoint. */
397 /* String form of the breakpoint condition (malloc'd), or NULL if there
400 /* String form of exp (malloc'd), or NULL if none. */
403 /* The expression we are watching, or NULL if not a watchpoint. */
404 struct expression
*exp
;
405 /* The largest block within which it is valid, or NULL if it is
406 valid anywhere (e.g. consists just of global symbols). */
407 struct block
*exp_valid_block
;
408 /* Value of the watchpoint the last time we checked it, or NULL
409 when we do not know the value yet or the value was not
410 readable. VAL is never lazy. */
412 /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
413 then an error occurred reading the value. */
416 /* Holds the address of the related watchpoint_scope breakpoint
417 when using watchpoints on local variables (might the concept
418 of a related breakpoint be useful elsewhere, if not just call
419 it the watchpoint_scope breakpoint or something like that. FIXME). */
420 struct breakpoint
*related_breakpoint
;
422 /* Holds the frame address which identifies the frame this
423 watchpoint should be evaluated in, or `null' if the watchpoint
424 should be evaluated on the outermost frame. */
425 struct frame_id watchpoint_frame
;
427 /* For hardware watchpoints, the triggered status according to the
429 enum watchpoint_triggered watchpoint_triggered
;
431 /* Thread number for thread-specific breakpoint, or -1 if don't care */
434 /* Count of the number of times this breakpoint was taken, dumped
435 with the info, but not used for anything else. Useful for
436 seeing how many times you hit a break prior to the program
437 aborting, so you can back up to just before the abort. */
440 /* Filename of a dynamically-linked library (dll), used for
441 bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
442 library is significant. */
445 /* Filename of a dll whose state change (e.g., load or unload)
446 triggered this catchpoint. This field is only valid immediately
447 after this catchpoint has triggered. */
448 char *triggered_dll_pathname
;
450 /* Process id of a child process whose forking triggered this
451 catchpoint. This field is only valid immediately after this
452 catchpoint has triggered. */
453 ptid_t forked_inferior_pid
;
455 /* Filename of a program whose exec triggered this catchpoint.
456 This field is only valid immediately after this catchpoint has
460 /* Methods associated with this breakpoint. */
461 struct breakpoint_ops
*ops
;
463 /* Is breakpoint's condition not yet parsed because we found
464 no location initially so had no context to parse
466 int condition_not_parsed
;
469 typedef struct breakpoint
*breakpoint_p
;
470 DEF_VEC_P(breakpoint_p
);
472 /* The following stuff is an abstract data type "bpstat" ("breakpoint
473 status"). This provides the ability to determine whether we have
474 stopped at a breakpoint, and what we should do about it. */
476 typedef struct bpstats
*bpstat
;
478 /* Frees any storage that is part of a bpstat.
479 Does not walk the 'next' chain. */
480 extern void bpstat_free (bpstat
);
482 /* Clears a chain of bpstat, freeing storage
484 extern void bpstat_clear (bpstat
*);
486 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
487 is part of the bpstat is copied as well. */
488 extern bpstat
bpstat_copy (bpstat
);
490 extern bpstat
bpstat_stop_status (CORE_ADDR pc
, ptid_t ptid
);
492 /* This bpstat_what stuff tells wait_for_inferior what to do with a
493 breakpoint (a challenging task). */
495 enum bpstat_what_main_action
497 /* Perform various other tests; that is, this bpstat does not
498 say to perform any action (e.g. failed watchpoint and nothing
500 BPSTAT_WHAT_KEEP_CHECKING
,
502 /* Rather than distinguish between noisy and silent stops here, it
503 might be cleaner to have bpstat_print make that decision (also
504 taking into account stop_print_frame and source_only). But the
505 implications are a bit scary (interaction with auto-displays, etc.),
506 so I won't try it. */
509 BPSTAT_WHAT_STOP_SILENT
,
511 /* Stop and print. */
512 BPSTAT_WHAT_STOP_NOISY
,
514 /* Remove breakpoints, single step once, then put them back in and
515 go back to what we were doing. It's possible that this should be
516 removed from the main_action and put into a separate field, to more
517 cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
520 /* Set longjmp_resume breakpoint, remove all other breakpoints,
521 and continue. The "remove all other breakpoints" part is required
522 if we are also stepping over another breakpoint as well as doing
523 the longjmp handling. */
524 BPSTAT_WHAT_SET_LONGJMP_RESUME
,
526 /* Clear longjmp_resume breakpoint, then handle as
527 BPSTAT_WHAT_KEEP_CHECKING. */
528 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
,
530 /* Clear step resume breakpoint, and keep checking. */
531 BPSTAT_WHAT_STEP_RESUME
,
533 /* Check the dynamic linker's data structures for new libraries, then
535 BPSTAT_WHAT_CHECK_SHLIBS
,
537 /* Check the dynamic linker's data structures for new libraries, then
538 resume out of the dynamic linker's callback, stop and print. */
539 BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
,
541 /* This is just used to keep track of how many enums there are. */
547 enum bpstat_what_main_action main_action
;
549 /* Did we hit a call dummy breakpoint? This only goes with a main_action
550 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
551 continuing from a call dummy without popping the frame is not a
556 /* The possible return values for print_bpstat, print_it_normal,
557 print_it_done, print_it_noop. */
558 enum print_stop_action
566 /* Tell what to do about this bpstat. */
567 struct bpstat_what
bpstat_what (bpstat
);
569 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
570 bpstat
bpstat_find_breakpoint (bpstat
, struct breakpoint
*);
572 /* Find a step_resume breakpoint associated with this bpstat.
573 (If there are multiple step_resume bp's on the list, this function
574 will arbitrarily pick one.)
576 It is an error to use this function if BPSTAT doesn't contain a
577 step_resume breakpoint.
579 See wait_for_inferior's use of this function.
581 extern struct breakpoint
*bpstat_find_step_resume_breakpoint (bpstat
);
583 /* Nonzero if a signal that we got in wait() was due to circumstances
584 explained by the BS. */
585 /* Currently that is true if we have hit a breakpoint, or if there is
586 a watchpoint enabled. */
587 #define bpstat_explains_signal(bs) ((bs) != NULL)
589 /* Nonzero if we should step constantly (e.g. watchpoints on machines
590 without hardware support). This isn't related to a specific bpstat,
591 just to things like whether watchpoints are set. */
592 extern int bpstat_should_step (void);
594 /* Print a message indicating what happened. Returns nonzero to
595 say that only the source line should be printed after this (zero
596 return means print the frame as well as the source line). */
597 extern enum print_stop_action
bpstat_print (bpstat
);
599 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
600 at. *BSP upon return is a bpstat which points to the remaining
601 breakpoints stopped at (but which is not guaranteed to be good for
602 anything but further calls to bpstat_num).
603 Return 0 if passed a bpstat which does not indicate any breakpoints.
604 Return -1 if stopped at a breakpoint that has been deleted since
606 Return 1 otherwise. */
607 extern int bpstat_num (bpstat
*, int *);
609 /* Perform actions associated with having stopped at *BSP. Actually, we just
610 use this for breakpoint commands. Perhaps other actions will go here
611 later, but this is executed at a late time (from the command loop). */
612 extern void bpstat_do_actions (bpstat
*);
614 /* Modify BS so that the actions will not be performed. */
615 extern void bpstat_clear_actions (bpstat
);
617 /* Given a bpstat that records zero or more triggered eventpoints, this
618 function returns another bpstat which contains only the catchpoints
619 on that first list, if any.
621 extern void bpstat_get_triggered_catchpoints (bpstat
, bpstat
*);
623 /* Implementation: */
625 /* Values used to tell the printing routine how to behave for this bpstat. */
628 /* This is used when we want to do a normal printing of the reason
629 for stopping. The output will depend on the type of eventpoint
630 we are dealing with. This is the default value, most commonly
633 /* This is used when nothing should be printed for this bpstat entry. */
635 /* This is used when everything which needs to be printed has
636 already been printed. But we still want to print the frame. */
642 /* Linked list because there can be two breakpoints at the same
643 place, and a bpstat reflects the fact that both have been hit. */
645 /* Breakpoint that we are at. */
646 const struct bp_location
*breakpoint_at
;
647 /* Commands left to be done. */
648 struct command_line
*commands
;
649 /* Old value associated with a watchpoint. */
650 struct value
*old_val
;
652 /* Nonzero if this breakpoint tells us to print the frame. */
655 /* Nonzero if this breakpoint tells us to stop. */
658 /* Tell bpstat_print and print_bp_stop_message how to print stuff
659 associated with this element of the bpstat chain. */
660 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 breakpoint_inserted_here_p (CORE_ADDR
);
686 extern int regular_breakpoint_inserted_here_p (CORE_ADDR
);
688 extern int software_breakpoint_inserted_here_p (CORE_ADDR
);
690 extern int breakpoint_thread_match (CORE_ADDR
, ptid_t
);
692 extern void until_break_command (char *, int, int);
694 extern void breakpoint_re_set (void);
696 extern void breakpoint_re_set_thread (struct breakpoint
*);
698 extern struct breakpoint
*set_momentary_breakpoint
699 (struct symtab_and_line
, struct frame_id
, enum bptype
);
701 extern struct breakpoint
*set_momentary_breakpoint_at_pc
702 (CORE_ADDR pc
, enum bptype type
);
704 extern void set_ignore_count (int, int, int);
706 extern void set_default_breakpoint (int, CORE_ADDR
, struct symtab
*, int);
708 extern void breakpoint_init_inferior (enum inf_context
);
710 extern struct cleanup
*make_cleanup_delete_breakpoint (struct breakpoint
*);
712 extern void delete_breakpoint (struct breakpoint
*);
714 extern void breakpoint_auto_delete (bpstat
);
716 extern void breakpoint_clear_ignore_counts (void);
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) */