1 /* Data structures associated with breakpoints in GDB.
2 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
3 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #if !defined (BREAKPOINT_H)
21 #define BREAKPOINT_H 1
30 /* This is the maximum number of bytes a breakpoint instruction can take.
31 Feel free to increase it. It's just used in a few places to size
32 arrays that should be independent of the target architecture. */
34 #define BREAKPOINT_MAX 16
36 /* Type of breakpoint. */
37 /* FIXME In the future, we should fold all other breakpoint-like things into
40 * single-step (for machines where we have to simulate single stepping)
41 (probably, though perhaps it is better for it to look as much as
42 possible like a single-step to wait_for_inferior). */
46 bp_none
= 0, /* Eventpoint has been deleted. */
47 bp_breakpoint
, /* Normal breakpoint */
48 bp_hardware_breakpoint
, /* Hardware assisted breakpoint */
49 bp_until
, /* used by until command */
50 bp_finish
, /* used by finish command */
51 bp_watchpoint
, /* Watchpoint */
52 bp_hardware_watchpoint
, /* Hardware assisted watchpoint */
53 bp_read_watchpoint
, /* read watchpoint, (hardware assisted) */
54 bp_access_watchpoint
, /* access watchpoint, (hardware assisted) */
55 bp_longjmp
, /* secret breakpoint to find longjmp() */
56 bp_longjmp_resume
, /* secret breakpoint to escape longjmp() */
58 /* Used by wait_for_inferior for stepping over subroutine calls, for
59 stepping over signal handlers, and for skipping prologues. */
62 /* Used to detect when a watchpoint expression has gone out of
63 scope. These breakpoints are usually not visible to the user.
65 This breakpoint has some interesting properties:
67 1) There's always a 1:1 mapping between watchpoints
68 on local variables and watchpoint_scope breakpoints.
70 2) It automatically deletes itself and the watchpoint it's
71 associated with when hit.
73 3) It can never be disabled. */
76 /* The breakpoint at the end of a call dummy. */
77 /* FIXME: What if the function we are calling longjmp()s out of the
78 call, or the user gets out with the "return" command? We currently
79 have no way of cleaning up the breakpoint in these (obscure) situations.
80 (Probably can solve this by noticing longjmp, "return", etc., it's
81 similar to noticing when a watchpoint on a local variable goes out
82 of scope (with hardware support for watchpoints)). */
85 /* Some dynamic linkers (HP, maybe Solaris) can arrange for special
86 code in the inferior to run when significant events occur in the
87 dynamic linker (for example a library is loaded or unloaded).
89 By placing a breakpoint in this magic code GDB will get control
90 when these significant events occur. GDB can then re-examine
91 the dynamic linker's data structures to discover any newly loaded
95 /* Some multi-threaded systems can arrange for a location in the
96 inferior to be executed when certain thread-related events occur
97 (such as thread creation or thread death).
99 By placing a breakpoint at one of these locations, GDB will get
100 control when these events occur. GDB can then update its thread
105 /* On the same principal, an overlay manager can arrange to call a
106 magic location in the inferior whenever there is an interesting
107 change in overlay status. GDB can update its overlay tables
108 and fiddle with breakpoints in overlays when this breakpoint
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".) */
132 /* States of enablement of breakpoint. */
136 bp_disabled
, /* The eventpoint is inactive, and cannot trigger. */
137 bp_enabled
, /* The eventpoint is active, and can trigger. */
138 bp_call_disabled
, /* The eventpoint has been disabled while a call
139 into the inferior is "in flight", because some
140 eventpoints interfere with the implementation of
141 a call on some targets. The eventpoint will be
142 automatically enabled and reset when the call
143 "lands" (either completes, or stops at another
145 bp_permanent
/* There is a breakpoint instruction hard-wired into
146 the target's code. Don't try to write another
147 breakpoint instruction on top of it, or restore
148 its value. Step over it using the architecture's
153 /* Disposition of breakpoint. Ie: what to do after hitting it. */
157 disp_del
, /* Delete it */
158 disp_del_at_next_stop
, /* Delete at next stop, whether hit or not */
159 disp_disable
, /* Disable it */
160 disp_donttouch
/* Leave it alone */
163 enum target_hw_bp_type
165 hw_write
= 0, /* Common HW watchpoint */
166 hw_read
= 1, /* Read HW watchpoint */
167 hw_access
= 2, /* Access HW watchpoint */
168 hw_execute
= 3 /* Execute HW breakpoint */
172 /* Information used by targets to insert and remove breakpoints. */
174 struct bp_target_info
176 /* Address at which the breakpoint was placed. This is normally the
177 same as ADDRESS from the bp_location, except when adjustment
178 happens in gdbarch_breakpoint_from_pc. The most common form of
179 adjustment is stripping an alternate ISA marker from the PC which
180 is used to determine the type of breakpoint to insert. */
181 CORE_ADDR placed_address
;
183 /* If the breakpoint lives in memory and reading that memory would
184 give back the breakpoint, instead of the original contents, then
185 the original contents are cached here. Only SHADOW_LEN bytes of
186 this buffer are valid, and only when the breakpoint is inserted. */
187 gdb_byte shadow_contents
[BREAKPOINT_MAX
];
189 /* The length of the data cached in SHADOW_CONTENTS. */
192 /* The size of the placed breakpoint, according to
193 gdbarch_breakpoint_from_pc, when the breakpoint was inserted. This is
194 generally the same as SHADOW_LEN, unless we did not need
195 to read from the target to implement the memory breakpoint
196 (e.g. if a remote stub handled the details). We may still
197 need the size to remove the breakpoint safely. */
201 /* GDB maintains two types of information about each breakpoint (or
202 watchpoint, or other related event). The first type corresponds
203 to struct breakpoint; this is a relatively high-level structure
204 which contains the source location(s), stopping conditions, user
205 commands to execute when the breakpoint is hit, and so forth.
207 The second type of information corresponds to struct bp_location.
208 Each breakpoint has one or (eventually) more locations associated
209 with it, which represent target-specific and machine-specific
210 mechanisms for stopping the program. For instance, a watchpoint
211 expression may require multiple hardware watchpoints in order to
212 catch all changes in the value of the expression being watched. */
216 bp_loc_software_breakpoint
,
217 bp_loc_hardware_breakpoint
,
218 bp_loc_hardware_watchpoint
,
219 bp_loc_other
/* Miscellaneous... */
224 /* Chain pointer to the next breakpoint location for
225 the same parent breakpoint. */
226 struct bp_location
*next
;
228 /* Pointer to the next breakpoint location, in a global
229 list of all breakpoint locations. */
230 struct bp_location
*global_next
;
232 /* Type of this breakpoint location. */
233 enum bp_loc_type loc_type
;
235 /* Each breakpoint location must belong to exactly one higher-level
236 breakpoint. This and the DUPLICATE flag are more straightforward
237 than reference counting. */
238 struct breakpoint
*owner
;
240 /* Conditional. Break only if this expression's value is nonzero.
241 Unlike string form of condition, which is associated with breakpoint,
242 this is associated with location, since if breakpoint has several
243 locations, the evaluation of expression can be different for
244 different locations. */
245 struct expression
*cond
;
247 /* This location's address is in an unloaded solib, and so this
248 location should not be inserted. It will be automatically
249 enabled when that solib is loaded. */
252 /* Is this particular location enabled. */
255 /* Nonzero if this breakpoint is now inserted. */
258 /* Nonzero if this is not the first breakpoint in the list
259 for the given address. */
262 /* If we someday support real thread-specific breakpoints, then
263 the breakpoint location will need a thread identifier. */
265 /* Data for specific breakpoint types. These could be a union, but
266 simplicity is more important than memory usage for breakpoints. */
268 /* Note that zero is a perfectly valid code address on some platforms
269 (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
270 is not a special value for this field. Valid for all types except
274 /* For hardware watchpoints, the size of data ad ADDRESS being watches. */
277 /* Type of hardware watchpoint. */
278 enum target_hw_bp_type watchpoint_type
;
280 /* For any breakpoint type with an address, this is the section
281 associated with the address. Used primarily for overlay debugging. */
282 struct obj_section
*section
;
284 /* Address at which breakpoint was requested, either by the user or
285 by GDB for internal breakpoints. This will usually be the same
286 as ``address'' (above) except for cases in which
287 ADJUST_BREAKPOINT_ADDRESS has computed a different address at
288 which to place the breakpoint in order to comply with a
289 processor's architectual constraints. */
290 CORE_ADDR requested_address
;
294 /* Details of the placed breakpoint, when inserted. */
295 struct bp_target_info target_info
;
297 /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
298 struct bp_target_info overlay_target_info
;
300 /* In a non-stop mode, it's possible that we delete a breakpoint,
301 but as we do that, some still running thread hits that breakpoint.
302 For that reason, we need to keep locations belonging to deleted
303 breakpoints for a bit, so that don't report unexpected SIGTRAP.
304 We can't keep such locations forever, so we use a heuristic --
305 after we process certain number of inferior events since
306 breakpoint was deleted, we retire all locations of that breakpoint.
307 This variable keeps a number of events still to go, when
308 it becomes 0 this location is retired. */
309 int events_till_retirement
;
312 /* This structure is a collection of function pointers that, if available,
313 will be called instead of the performing the default action for this
316 struct breakpoint_ops
318 /* Insert the breakpoint or activate the catchpoint. Should raise
319 an exception if the operation failed. */
320 void (*insert
) (struct breakpoint
*);
322 /* Remove the breakpoint/catchpoint that was previously inserted
323 with the "insert" method above. Return non-zero if the operation
325 int (*remove
) (struct breakpoint
*);
327 /* Return non-zero if the debugger should tell the user that this
328 breakpoint was hit. */
329 int (*breakpoint_hit
) (struct breakpoint
*);
331 /* The normal print routine for this breakpoint, called when we
333 enum print_stop_action (*print_it
) (struct breakpoint
*);
335 /* Display information about this breakpoint, for "info breakpoints". */
336 void (*print_one
) (struct breakpoint
*, CORE_ADDR
*);
338 /* Display information about this breakpoint after setting it (roughly
339 speaking; this is called from "mention"). */
340 void (*print_mention
) (struct breakpoint
*);
343 enum watchpoint_triggered
345 /* This watchpoint definitely did not trigger. */
346 watch_triggered_no
= 0,
348 /* Some hardware watchpoint triggered, and it might have been this
349 one, but we do not know which it was. */
350 watch_triggered_unknown
,
352 /* This hardware watchpoint definitely did trigger. */
356 typedef struct bp_location
*bp_location_p
;
357 DEF_VEC_P(bp_location_p
);
359 /* Note that the ->silent field is not currently used by any commands
360 (though the code is in there if it was to be, and set_raw_breakpoint
361 does set it to 0). I implemented it because I thought it would be
362 useful for a hack I had to put in; I'm going to leave it in because
363 I can see how there might be times when it would indeed be useful */
365 /* This is for a breakpoint or a watchpoint. */
369 struct breakpoint
*next
;
370 /* Type of breakpoint. */
372 /* Zero means disabled; remember the info but don't break here. */
373 enum enable_state enable_state
;
374 /* What to do with this breakpoint after we hit it. */
375 enum bpdisp disposition
;
376 /* Number assigned to distinguish breakpoints. */
379 /* Location(s) associated with this high-level breakpoint. */
380 struct bp_location
*loc
;
382 /* Line number of this address. */
386 /* Source file name of this address. */
390 /* Non-zero means a silent breakpoint (don't print frame info
392 unsigned char silent
;
393 /* Number of stops at this breakpoint that should
394 be continued automatically before really stopping. */
396 /* Chain of command lines to execute when this breakpoint is hit. */
397 struct command_line
*commands
;
398 /* Stack depth (address of frame). If nonzero, break only if fp
400 struct frame_id frame_id
;
402 /* String we used to set the breakpoint (malloc'd). */
404 /* Language we used to set the breakpoint. */
405 enum language language
;
406 /* Input radix we used to set the breakpoint. */
408 /* String form of the breakpoint condition (malloc'd), or NULL if there
411 /* String form of exp (malloc'd), or NULL if none. */
414 /* The expression we are watching, or NULL if not a watchpoint. */
415 struct expression
*exp
;
416 /* The largest block within which it is valid, or NULL if it is
417 valid anywhere (e.g. consists just of global symbols). */
418 struct block
*exp_valid_block
;
419 /* Value of the watchpoint the last time we checked it, or NULL
420 when we do not know the value yet or the value was not
421 readable. VAL is never lazy. */
423 /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
424 then an error occurred reading the value. */
427 /* Holds the address of the related watchpoint_scope breakpoint
428 when using watchpoints on local variables (might the concept
429 of a related breakpoint be useful elsewhere, if not just call
430 it the watchpoint_scope breakpoint or something like that. FIXME). */
431 struct breakpoint
*related_breakpoint
;
433 /* Holds the frame address which identifies the frame this
434 watchpoint should be evaluated in, or `null' if the watchpoint
435 should be evaluated on the outermost frame. */
436 struct frame_id watchpoint_frame
;
438 /* For hardware watchpoints, the triggered status according to the
440 enum watchpoint_triggered watchpoint_triggered
;
442 /* Thread number for thread-specific breakpoint, or -1 if don't care */
445 /* Count of the number of times this breakpoint was taken, dumped
446 with the info, but not used for anything else. Useful for
447 seeing how many times you hit a break prior to the program
448 aborting, so you can back up to just before the abort. */
451 /* Filename of a dynamically-linked library (dll), used for
452 bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
453 library is significant. */
456 /* Filename of a dll whose state change (e.g., load or unload)
457 triggered this catchpoint. This field is only valid immediately
458 after this catchpoint has triggered. */
459 char *triggered_dll_pathname
;
461 /* Process id of a child process whose forking triggered this
462 catchpoint. This field is only valid immediately after this
463 catchpoint has triggered. */
464 ptid_t forked_inferior_pid
;
466 /* Filename of a program whose exec triggered this catchpoint.
467 This field is only valid immediately after this catchpoint has
471 /* Methods associated with this breakpoint. */
472 struct breakpoint_ops
*ops
;
474 /* Is breakpoint's condition not yet parsed because we found
475 no location initially so had no context to parse
477 int condition_not_parsed
;
480 typedef struct breakpoint
*breakpoint_p
;
481 DEF_VEC_P(breakpoint_p
);
483 /* The following stuff is an abstract data type "bpstat" ("breakpoint
484 status"). This provides the ability to determine whether we have
485 stopped at a breakpoint, and what we should do about it. */
487 typedef struct bpstats
*bpstat
;
489 /* Frees any storage that is part of a bpstat.
490 Does not walk the 'next' chain. */
491 extern void bpstat_free (bpstat
);
493 /* Clears a chain of bpstat, freeing storage
495 extern void bpstat_clear (bpstat
*);
497 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
498 is part of the bpstat is copied as well. */
499 extern bpstat
bpstat_copy (bpstat
);
501 extern bpstat
bpstat_stop_status (CORE_ADDR pc
, ptid_t ptid
);
503 /* This bpstat_what stuff tells wait_for_inferior what to do with a
504 breakpoint (a challenging task). */
506 enum bpstat_what_main_action
508 /* Perform various other tests; that is, this bpstat does not
509 say to perform any action (e.g. failed watchpoint and nothing
511 BPSTAT_WHAT_KEEP_CHECKING
,
513 /* Rather than distinguish between noisy and silent stops here, it
514 might be cleaner to have bpstat_print make that decision (also
515 taking into account stop_print_frame and source_only). But the
516 implications are a bit scary (interaction with auto-displays, etc.),
517 so I won't try it. */
520 BPSTAT_WHAT_STOP_SILENT
,
522 /* Stop and print. */
523 BPSTAT_WHAT_STOP_NOISY
,
525 /* Remove breakpoints, single step once, then put them back in and
526 go back to what we were doing. It's possible that this should be
527 removed from the main_action and put into a separate field, to more
528 cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
531 /* Set longjmp_resume breakpoint, remove all other breakpoints,
532 and continue. The "remove all other breakpoints" part is required
533 if we are also stepping over another breakpoint as well as doing
534 the longjmp handling. */
535 BPSTAT_WHAT_SET_LONGJMP_RESUME
,
537 /* Clear longjmp_resume breakpoint, then handle as
538 BPSTAT_WHAT_KEEP_CHECKING. */
539 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
,
541 /* Clear step resume breakpoint, and keep checking. */
542 BPSTAT_WHAT_STEP_RESUME
,
544 /* Check the dynamic linker's data structures for new libraries, then
546 BPSTAT_WHAT_CHECK_SHLIBS
,
548 /* Check the dynamic linker's data structures for new libraries, then
549 resume out of the dynamic linker's callback, stop and print. */
550 BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
,
552 /* This is just used to keep track of how many enums there are. */
558 enum bpstat_what_main_action main_action
;
560 /* Did we hit a call dummy breakpoint? This only goes with a main_action
561 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
562 continuing from a call dummy without popping the frame is not a
567 /* The possible return values for print_bpstat, print_it_normal,
568 print_it_done, print_it_noop. */
569 enum print_stop_action
577 /* Tell what to do about this bpstat. */
578 struct bpstat_what
bpstat_what (bpstat
);
580 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
581 bpstat
bpstat_find_breakpoint (bpstat
, struct breakpoint
*);
583 /* Find a step_resume breakpoint associated with this bpstat.
584 (If there are multiple step_resume bp's on the list, this function
585 will arbitrarily pick one.)
587 It is an error to use this function if BPSTAT doesn't contain a
588 step_resume breakpoint.
590 See wait_for_inferior's use of this function.
592 extern struct breakpoint
*bpstat_find_step_resume_breakpoint (bpstat
);
594 /* Nonzero if a signal that we got in wait() was due to circumstances
595 explained by the BS. */
596 /* Currently that is true if we have hit a breakpoint, or if there is
597 a watchpoint enabled. */
598 #define bpstat_explains_signal(bs) ((bs) != NULL)
600 /* Nonzero if we should step constantly (e.g. watchpoints on machines
601 without hardware support). This isn't related to a specific bpstat,
602 just to things like whether watchpoints are set. */
603 extern int bpstat_should_step (void);
605 /* Print a message indicating what happened. Returns nonzero to
606 say that only the source line should be printed after this (zero
607 return means print the frame as well as the source line). */
608 extern enum print_stop_action
bpstat_print (bpstat
);
610 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
611 at. *BSP upon return is a bpstat which points to the remaining
612 breakpoints stopped at (but which is not guaranteed to be good for
613 anything but further calls to bpstat_num).
614 Return 0 if passed a bpstat which does not indicate any breakpoints.
615 Return -1 if stopped at a breakpoint that has been deleted since
617 Return 1 otherwise. */
618 extern int bpstat_num (bpstat
*, int *);
620 /* Perform actions associated with the stopped inferior. Actually, we
621 just use this for breakpoint commands. Perhaps other actions will
622 go here later, but this is executed at a late time (from the
624 extern void bpstat_do_actions (void);
626 /* Modify BS so that the actions will not be performed. */
627 extern void bpstat_clear_actions (bpstat
);
629 /* Given a bpstat that records zero or more triggered eventpoints, this
630 function returns another bpstat which contains only the catchpoints
631 on that first list, if any.
633 extern void bpstat_get_triggered_catchpoints (bpstat
, bpstat
*);
635 /* Implementation: */
637 /* Values used to tell the printing routine how to behave for this bpstat. */
640 /* This is used when we want to do a normal printing of the reason
641 for stopping. The output will depend on the type of eventpoint
642 we are dealing with. This is the default value, most commonly
645 /* This is used when nothing should be printed for this bpstat entry. */
647 /* This is used when everything which needs to be printed has
648 already been printed. But we still want to print the frame. */
654 /* Linked list because there can be two breakpoints at the same
655 place, and a bpstat reflects the fact that both have been hit. */
657 /* Breakpoint that we are at. */
658 const struct bp_location
*breakpoint_at
;
659 /* Commands left to be done. */
660 struct command_line
*commands
;
661 /* Old value associated with a watchpoint. */
662 struct value
*old_val
;
664 /* Nonzero if this breakpoint tells us to print the frame. */
667 /* Nonzero if this breakpoint tells us to stop. */
670 /* Tell bpstat_print and print_bp_stop_message how to print stuff
671 associated with this element of the bpstat chain. */
672 enum bp_print_how print_it
;
683 /* The possible return values for breakpoint_here_p.
684 We guarantee that zero always means "no breakpoint here". */
687 no_breakpoint_here
= 0,
688 ordinary_breakpoint_here
,
689 permanent_breakpoint_here
693 /* Prototypes for breakpoint-related functions. */
695 extern enum breakpoint_here
breakpoint_here_p (CORE_ADDR
);
697 extern int moribund_breakpoint_here_p (CORE_ADDR
);
699 extern int breakpoint_inserted_here_p (CORE_ADDR
);
701 extern int regular_breakpoint_inserted_here_p (CORE_ADDR
);
703 extern int software_breakpoint_inserted_here_p (CORE_ADDR
);
705 extern int breakpoint_thread_match (CORE_ADDR
, ptid_t
);
707 extern void until_break_command (char *, int, int);
709 extern void breakpoint_re_set (void);
711 extern void breakpoint_re_set_thread (struct breakpoint
*);
713 extern struct breakpoint
*set_momentary_breakpoint
714 (struct symtab_and_line
, struct frame_id
, enum bptype
);
716 extern struct breakpoint
*set_momentary_breakpoint_at_pc
717 (CORE_ADDR pc
, enum bptype type
);
719 extern void set_ignore_count (int, int, int);
721 extern void set_default_breakpoint (int, CORE_ADDR
, struct symtab
*, int);
723 extern void breakpoint_init_inferior (enum inf_context
);
725 extern struct cleanup
*make_cleanup_delete_breakpoint (struct breakpoint
*);
727 extern void delete_breakpoint (struct breakpoint
*);
729 extern void breakpoint_auto_delete (bpstat
);
731 extern void break_command (char *, int);
733 extern void hbreak_command_wrapper (char *, int);
734 extern void thbreak_command_wrapper (char *, int);
735 extern void rbreak_command_wrapper (char *, int);
736 extern void watch_command_wrapper (char *, int);
737 extern void awatch_command_wrapper (char *, int);
738 extern void rwatch_command_wrapper (char *, int);
739 extern void tbreak_command (char *, int);
741 extern void set_breakpoint (char *address
, char *condition
,
742 int hardwareflag
, int tempflag
,
743 int thread
, int ignore_count
,
746 extern void insert_breakpoints (void);
748 extern int remove_breakpoints (void);
750 /* This function can be used to physically insert eventpoints from the
751 specified traced inferior process, without modifying the breakpoint
752 package's state. This can be useful for those targets which support
753 following the processes of a fork() or vfork() system call, when both
754 of the resulting two processes are to be followed. */
755 extern int reattach_breakpoints (int);
757 /* This function can be used to update the breakpoint package's state
758 after an exec() system call has been executed.
760 This function causes the following:
762 - All eventpoints are marked "not inserted".
763 - All eventpoints with a symbolic address are reset such that
764 the symbolic address must be reevaluated before the eventpoints
766 - The solib breakpoints are explicitly removed from the breakpoint
768 - A step-resume breakpoint, if any, is explicitly removed from the
770 - All eventpoints without a symbolic address are removed from the
772 extern void update_breakpoints_after_exec (void);
774 /* This function can be used to physically remove hardware breakpoints
775 and watchpoints from the specified traced inferior process, without
776 modifying the breakpoint package's state. This can be useful for
777 those targets which support following the processes of a fork() or
778 vfork() system call, when one of the resulting two processes is to
779 be detached and allowed to run free.
781 It is an error to use this function on the process whose id is
783 extern int detach_breakpoints (int);
785 extern void set_longjmp_breakpoint (void);
786 extern void delete_longjmp_breakpoint (int thread
);
788 extern void enable_overlay_breakpoints (void);
789 extern void disable_overlay_breakpoints (void);
791 /* These functions respectively disable or reenable all currently
792 enabled watchpoints. When disabled, the watchpoints are marked
793 call_disabled. When reenabled, they are marked enabled.
795 The intended client of these functions is call_function_by_hand.
797 The inferior must be stopped, and all breakpoints removed, when
798 these functions are used.
800 The need for these functions is that on some targets (e.g., HP-UX),
801 gdb is unable to unwind through the dummy frame that is pushed as
802 part of the implementation of a call command. Watchpoints can
803 cause the inferior to stop in places where this frame is visible,
804 and that can cause execution control to become very confused.
806 Note that if a user sets breakpoints in an interactively called
807 function, the call_disabled watchpoints will have been reenabled
808 when the first such breakpoint is reached. However, on targets
809 that are unable to unwind through the call dummy frame, watches
810 of stack-based storage may then be deleted, because gdb will
811 believe that their watched storage is out of scope. (Sigh.) */
812 extern void disable_watchpoints_before_interactive_call_start (void);
814 extern void enable_watchpoints_after_interactive_call_stop (void);
816 /* For script interpreters that need to define breakpoint commands
817 after they've already read the commands into a struct command_line. */
818 extern enum command_control_type commands_from_control_command
819 (char *arg
, struct command_line
*cmd
);
821 extern void clear_breakpoint_hit_counts (void);
823 extern int get_number (char **);
825 extern int get_number_or_range (char **);
827 /* The following are for displays, which aren't really breakpoints, but
828 here is as good a place as any for them. */
830 extern void disable_current_display (void);
832 extern void do_displays (void);
834 extern void disable_display (int);
836 extern void clear_displays (void);
838 extern void disable_breakpoint (struct breakpoint
*);
840 extern void enable_breakpoint (struct breakpoint
*);
842 /* Clear the "inserted" flag in all breakpoints. */
843 extern void mark_breakpoints_out (void);
845 extern void make_breakpoint_permanent (struct breakpoint
*);
847 extern struct breakpoint
*create_solib_event_breakpoint (CORE_ADDR
);
849 extern struct breakpoint
*create_thread_event_breakpoint (CORE_ADDR
);
851 extern void remove_solib_event_breakpoints (void);
853 extern void remove_thread_event_breakpoints (void);
855 extern void disable_breakpoints_in_shlibs (void);
857 /* This function returns TRUE if ep is a catchpoint. */
858 extern int ep_is_catchpoint (struct breakpoint
*);
860 /* This function returns TRUE if ep is a catchpoint of a
861 shared library (aka dynamically-linked library) event,
862 such as a library load or unload. */
863 extern int ep_is_shlib_catchpoint (struct breakpoint
*);
865 /* Enable breakpoints and delete when hit. Called with ARG == NULL
866 deletes all breakpoints. */
867 extern void delete_command (char *arg
, int from_tty
);
869 /* Pull all H/W watchpoints from the target. Return non-zero if the
871 extern int remove_hw_watchpoints (void);
873 /* Manage a software single step breakpoint (or two). Insert may be called
874 twice before remove is called. */
875 extern void insert_single_step_breakpoint (CORE_ADDR
);
876 extern void remove_single_step_breakpoints (void);
878 /* Manage manual breakpoints, separate from the normal chain of
879 breakpoints. These functions are used in murky target-specific
880 ways. Please do not add more uses! */
881 extern void *deprecated_insert_raw_breakpoint (CORE_ADDR
);
882 extern int deprecated_remove_raw_breakpoint (void *);
884 /* Check if any hardware watchpoints have triggered, according to the
886 int watchpoints_triggered (struct target_waitstatus
*);
888 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
889 by replacing any memory breakpoints with their shadowed contents. */
890 void breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
,
893 extern int breakpoints_always_inserted_mode (void);
895 /* Called each time new event from target is processed.
896 Retires previously deleted breakpoint locations that
897 in our opinion won't ever trigger. */
898 extern void breakpoint_retire_moribund (void);
900 /* Tell a breakpoint to be quiet. */
901 extern void make_breakpoint_silent (struct breakpoint
*);
903 #endif /* !defined (BREAKPOINT_H) */