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 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
26 #include "gdb-events.h"
31 /* This is the maximum number of bytes a breakpoint instruction can take.
32 Feel free to increase it. It's just used in a few places to size
33 arrays that should be independent of the target architecture. */
35 #define BREAKPOINT_MAX 16
37 /* Type of breakpoint. */
38 /* FIXME In the future, we should fold all other breakpoint-like things into
41 * single-step (for machines where we have to simulate single stepping)
42 (probably, though perhaps it is better for it to look as much as
43 possible like a single-step to wait_for_inferior). */
47 bp_none
= 0, /* Eventpoint has been deleted. */
48 bp_breakpoint
, /* Normal breakpoint */
49 bp_hardware_breakpoint
, /* Hardware assisted breakpoint */
50 bp_until
, /* used by until command */
51 bp_finish
, /* used by finish command */
52 bp_watchpoint
, /* Watchpoint */
53 bp_hardware_watchpoint
, /* Hardware assisted watchpoint */
54 bp_read_watchpoint
, /* read watchpoint, (hardware assisted) */
55 bp_access_watchpoint
, /* access watchpoint, (hardware assisted) */
56 bp_longjmp
, /* secret breakpoint to find longjmp() */
57 bp_longjmp_resume
, /* secret breakpoint to escape longjmp() */
59 /* Used by wait_for_inferior for stepping over subroutine calls, for
60 stepping over signal handlers, and for skipping prologues. */
63 /* Used to detect when a watchpoint expression has gone out of
64 scope. These breakpoints are usually not visible to the user.
66 This breakpoint has some interesting properties:
68 1) There's always a 1:1 mapping between watchpoints
69 on local variables and watchpoint_scope breakpoints.
71 2) It automatically deletes itself and the watchpoint it's
72 associated with when hit.
74 3) It can never be disabled. */
77 /* The breakpoint at the end of a call dummy. */
78 /* FIXME: What if the function we are calling longjmp()s out of the
79 call, or the user gets out with the "return" command? We currently
80 have no way of cleaning up the breakpoint in these (obscure) situations.
81 (Probably can solve this by noticing longjmp, "return", etc., it's
82 similar to noticing when a watchpoint on a local variable goes out
83 of scope (with hardware support for watchpoints)). */
86 /* Some dynamic linkers (HP, maybe Solaris) can arrange for special
87 code in the inferior to run when significant events occur in the
88 dynamic linker (for example a library is loaded or unloaded).
90 By placing a breakpoint in this magic code GDB will get control
91 when these significant events occur. GDB can then re-examine
92 the dynamic linker's data structures to discover any newly loaded
96 /* Some multi-threaded systems can arrange for a location in the
97 inferior to be executed when certain thread-related events occur
98 (such as thread creation or thread death).
100 By placing a breakpoint at one of these locations, GDB will get
101 control when these events occur. GDB can then update its thread
106 /* On the same principal, an overlay manager can arrange to call a
107 magic location in the inferior whenever there is an interesting
108 change in overlay status. GDB can update its overlay tables
109 and fiddle with breakpoints in overlays when this breakpoint
114 /* These breakpoints are used to implement the "catch load" command
115 on platforms whose dynamic linkers support such functionality. */
118 /* These breakpoints are used to implement the "catch unload" command
119 on platforms whose dynamic linkers support such functionality. */
122 /* These are not really breakpoints, but are catchpoints that
123 implement the "catch fork", "catch vfork" and "catch exec" commands
124 on platforms whose kernel support such functionality. (I.e.,
125 kernels which can raise an event when a fork or exec occurs, as
126 opposed to the debugger setting breakpoints on functions named
127 "fork" or "exec".) */
132 /* These are catchpoints to implement "catch catch" and "catch throw"
133 commands for C++ exception handling. */
140 /* States of enablement of breakpoint. */
144 bp_disabled
, /* The eventpoint is inactive, and cannot trigger. */
145 bp_enabled
, /* The eventpoint is active, and can trigger. */
146 bp_call_disabled
, /* The eventpoint has been disabled while a call
147 into the inferior is "in flight", because some
148 eventpoints interfere with the implementation of
149 a call on some targets. The eventpoint will be
150 automatically enabled and reset when the call
151 "lands" (either completes, or stops at another
153 bp_permanent
/* There is a breakpoint instruction hard-wired into
154 the target's code. Don't try to write another
155 breakpoint instruction on top of it, or restore
156 its value. Step over it using the architecture's
161 /* Disposition of breakpoint. Ie: what to do after hitting it. */
165 disp_del
, /* Delete it */
166 disp_del_at_next_stop
, /* Delete at next stop, whether hit or not */
167 disp_disable
, /* Disable it */
168 disp_donttouch
/* Leave it alone */
171 enum target_hw_bp_type
173 hw_write
= 0, /* Common HW watchpoint */
174 hw_read
= 1, /* Read HW watchpoint */
175 hw_access
= 2, /* Access HW watchpoint */
176 hw_execute
= 3 /* Execute HW breakpoint */
180 /* Information used by targets to insert and remove breakpoints. */
182 struct bp_target_info
184 /* Address at which the breakpoint was placed. This is normally the
185 same as ADDRESS from the bp_location, except when adjustment
186 happens in gdbarch_breakpoint_from_pc. The most common form of
187 adjustment is stripping an alternate ISA marker from the PC which
188 is used to determine the type of breakpoint to insert. */
189 CORE_ADDR placed_address
;
191 /* If the breakpoint lives in memory and reading that memory would
192 give back the breakpoint, instead of the original contents, then
193 the original contents are cached here. Only SHADOW_LEN bytes of
194 this buffer are valid, and only when the breakpoint is inserted. */
195 gdb_byte shadow_contents
[BREAKPOINT_MAX
];
197 /* The length of the data cached in SHADOW_CONTENTS. */
200 /* The size of the placed breakpoint, according to
201 gdbarch_breakpoint_from_pc, when the breakpoint was inserted. This is
202 generally the same as SHADOW_LEN, unless we did not need
203 to read from the target to implement the memory breakpoint
204 (e.g. if a remote stub handled the details). We may still
205 need the size to remove the breakpoint safely. */
209 /* GDB maintains two types of information about each breakpoint (or
210 watchpoint, or other related event). The first type corresponds
211 to struct breakpoint; this is a relatively high-level structure
212 which contains the source location(s), stopping conditions, user
213 commands to execute when the breakpoint is hit, and so forth.
215 The second type of information corresponds to struct bp_location.
216 Each breakpoint has one or (eventually) more locations associated
217 with it, which represent target-specific and machine-specific
218 mechanisms for stopping the program. For instance, a watchpoint
219 expression may require multiple hardware watchpoints in order to
220 catch all changes in the value of the expression being watched. */
224 bp_loc_software_breakpoint
,
225 bp_loc_hardware_breakpoint
,
226 bp_loc_hardware_watchpoint
,
227 bp_loc_other
/* Miscellaneous... */
232 /* Chain pointer to the next breakpoint location for
233 the same parent breakpoint. */
234 struct bp_location
*next
;
236 /* Pointer to the next breakpoint location, in a global
237 list of all breakpoint locations. */
238 struct bp_location
*global_next
;
240 /* Type of this breakpoint location. */
241 enum bp_loc_type loc_type
;
243 /* Each breakpoint location must belong to exactly one higher-level
244 breakpoint. This and the DUPLICATE flag are more straightforward
245 than reference counting. */
246 struct breakpoint
*owner
;
248 /* Conditional. Break only if this expression's value is nonzero.
249 Unlike string form of condition, which is associated with breakpoint,
250 this is associated with location, since if breakpoint has several
251 locations, the evaluation of expression can be different for
252 different locations. */
253 struct expression
*cond
;
255 /* This location's address is in an unloaded solib, and so this
256 location should not be inserted. It will be automatically
257 enabled when that solib is loaded. */
260 /* Is this particular location enabled. */
263 /* Nonzero if this breakpoint is now inserted. */
266 /* Nonzero if this is not the first breakpoint in the list
267 for the given address. */
270 /* If we someday support real thread-specific breakpoints, then
271 the breakpoint location will need a thread identifier. */
273 /* Data for specific breakpoint types. These could be a union, but
274 simplicity is more important than memory usage for breakpoints. */
276 /* Note that zero is a perfectly valid code address on some platforms
277 (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
278 is not a special value for this field. Valid for all types except
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
;
303 /* This structure is a collection of function pointers that, if available,
304 will be called instead of the performing the default action for this
307 struct breakpoint_ops
309 /* The normal print routine for this breakpoint, called when we
311 enum print_stop_action (*print_it
) (struct breakpoint
*);
313 /* Display information about this breakpoint, for "info breakpoints". */
314 void (*print_one
) (struct breakpoint
*, CORE_ADDR
*);
316 /* Display information about this breakpoint after setting it (roughly
317 speaking; this is called from "mention"). */
318 void (*print_mention
) (struct breakpoint
*);
321 enum watchpoint_triggered
323 /* This watchpoint definitely did not trigger. */
324 watch_triggered_no
= 0,
326 /* Some hardware watchpoint triggered, and it might have been this
327 one, but we do not know which it was. */
328 watch_triggered_unknown
,
330 /* This hardware watchpoint definitely did trigger. */
334 /* Note that the ->silent field is not currently used by any commands
335 (though the code is in there if it was to be, and set_raw_breakpoint
336 does set it to 0). I implemented it because I thought it would be
337 useful for a hack I had to put in; I'm going to leave it in because
338 I can see how there might be times when it would indeed be useful */
340 /* This is for a breakpoint or a watchpoint. */
344 struct breakpoint
*next
;
345 /* Type of breakpoint. */
347 /* Zero means disabled; remember the info but don't break here. */
348 enum enable_state enable_state
;
349 /* What to do with this breakpoint after we hit it. */
350 enum bpdisp disposition
;
351 /* Number assigned to distinguish breakpoints. */
354 /* Location(s) associated with this high-level breakpoint. */
355 struct bp_location
*loc
;
357 /* Line number of this address. */
361 /* Source file name of this address. */
365 /* Non-zero means a silent breakpoint (don't print frame info
367 unsigned char silent
;
368 /* Number of stops at this breakpoint that should
369 be continued automatically before really stopping. */
371 /* Chain of command lines to execute when this breakpoint is hit. */
372 struct command_line
*commands
;
373 /* Stack depth (address of frame). If nonzero, break only if fp
375 struct frame_id frame_id
;
377 /* String we used to set the breakpoint (malloc'd). */
379 /* Language we used to set the breakpoint. */
380 enum language language
;
381 /* Input radix we used to set the breakpoint. */
383 /* String form of the breakpoint condition (malloc'd), or NULL if there
386 /* String form of exp (malloc'd), or NULL if none. */
389 /* The expression we are watching, or NULL if not a watchpoint. */
390 struct expression
*exp
;
391 /* The largest block within which it is valid, or NULL if it is
392 valid anywhere (e.g. consists just of global symbols). */
393 struct block
*exp_valid_block
;
394 /* Value of the watchpoint the last time we checked it. */
397 /* Holds the value chain for a hardware watchpoint expression. */
398 struct value
*val_chain
;
400 /* Holds the address of the related watchpoint_scope breakpoint
401 when using watchpoints on local variables (might the concept
402 of a related breakpoint be useful elsewhere, if not just call
403 it the watchpoint_scope breakpoint or something like that. FIXME). */
404 struct breakpoint
*related_breakpoint
;
406 /* Holds the frame address which identifies the frame this
407 watchpoint should be evaluated in, or `null' if the watchpoint
408 should be evaluated on the outermost frame. */
409 struct frame_id watchpoint_frame
;
411 /* For hardware watchpoints, the triggered status according to the
413 enum watchpoint_triggered watchpoint_triggered
;
415 /* Thread number for thread-specific breakpoint, or -1 if don't care */
418 /* Count of the number of times this breakpoint was taken, dumped
419 with the info, but not used for anything else. Useful for
420 seeing how many times you hit a break prior to the program
421 aborting, so you can back up to just before the abort. */
424 /* Filename of a dynamically-linked library (dll), used for
425 bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
426 library is significant. */
429 /* Filename of a dll whose state change (e.g., load or unload)
430 triggered this catchpoint. This field is only valid immediately
431 after this catchpoint has triggered. */
432 char *triggered_dll_pathname
;
434 /* Process id of a child process whose forking triggered this
435 catchpoint. This field is only valid immediately after this
436 catchpoint has triggered. */
437 int forked_inferior_pid
;
439 /* Filename of a program whose exec triggered this catchpoint.
440 This field is only valid immediately after this catchpoint has
444 /* Methods associated with this breakpoint. */
445 struct breakpoint_ops
*ops
;
447 /* Was breakpoint issued from a tty? Saved for the use of pending breakpoints. */
450 /* Flag value for pending breakpoint.
451 first bit : 0 non-temporary, 1 temporary.
452 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
455 /* Is breakpoint's condition not yet parsed because we found
456 no location initially so had no context to parse
458 int condition_not_parsed
;
461 /* The following stuff is an abstract data type "bpstat" ("breakpoint
462 status"). This provides the ability to determine whether we have
463 stopped at a breakpoint, and what we should do about it. */
465 typedef struct bpstats
*bpstat
;
467 /* Frees any storage that is part of a bpstat.
468 Does not walk the 'next' chain. */
469 extern void bpstat_free (bpstat
);
471 /* Clears a chain of bpstat, freeing storage
473 extern void bpstat_clear (bpstat
*);
475 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
476 is part of the bpstat is copied as well. */
477 extern bpstat
bpstat_copy (bpstat
);
479 extern bpstat
bpstat_stop_status (CORE_ADDR pc
, ptid_t ptid
);
481 /* This bpstat_what stuff tells wait_for_inferior what to do with a
482 breakpoint (a challenging task). */
484 enum bpstat_what_main_action
486 /* Perform various other tests; that is, this bpstat does not
487 say to perform any action (e.g. failed watchpoint and nothing
489 BPSTAT_WHAT_KEEP_CHECKING
,
491 /* Rather than distinguish between noisy and silent stops here, it
492 might be cleaner to have bpstat_print make that decision (also
493 taking into account stop_print_frame and source_only). But the
494 implications are a bit scary (interaction with auto-displays, etc.),
495 so I won't try it. */
498 BPSTAT_WHAT_STOP_SILENT
,
500 /* Stop and print. */
501 BPSTAT_WHAT_STOP_NOISY
,
503 /* Remove breakpoints, single step once, then put them back in and
504 go back to what we were doing. It's possible that this should be
505 removed from the main_action and put into a separate field, to more
506 cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
509 /* Set longjmp_resume breakpoint, remove all other breakpoints,
510 and continue. The "remove all other breakpoints" part is required
511 if we are also stepping over another breakpoint as well as doing
512 the longjmp handling. */
513 BPSTAT_WHAT_SET_LONGJMP_RESUME
,
515 /* Clear longjmp_resume breakpoint, then handle as
516 BPSTAT_WHAT_KEEP_CHECKING. */
517 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
,
519 /* Clear longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */
520 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
,
522 /* Clear step resume breakpoint, and keep checking. */
523 BPSTAT_WHAT_STEP_RESUME
,
525 /* Check the dynamic linker's data structures for new libraries, then
527 BPSTAT_WHAT_CHECK_SHLIBS
,
529 /* Check the dynamic linker's data structures for new libraries, then
530 resume out of the dynamic linker's callback, stop and print. */
531 BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
,
533 /* This is just used to keep track of how many enums there are. */
539 enum bpstat_what_main_action main_action
;
541 /* Did we hit a call dummy breakpoint? This only goes with a main_action
542 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
543 continuing from a call dummy without popping the frame is not a
548 /* The possible return values for print_bpstat, print_it_normal,
549 print_it_done, print_it_noop. */
550 enum print_stop_action
558 /* Tell what to do about this bpstat. */
559 struct bpstat_what
bpstat_what (bpstat
);
561 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
562 bpstat
bpstat_find_breakpoint (bpstat
, struct breakpoint
*);
564 /* Find a step_resume breakpoint associated with this bpstat.
565 (If there are multiple step_resume bp's on the list, this function
566 will arbitrarily pick one.)
568 It is an error to use this function if BPSTAT doesn't contain a
569 step_resume breakpoint.
571 See wait_for_inferior's use of this function.
573 extern struct breakpoint
*bpstat_find_step_resume_breakpoint (bpstat
);
575 /* Nonzero if a signal that we got in wait() was due to circumstances
576 explained by the BS. */
577 /* Currently that is true if we have hit a breakpoint, or if there is
578 a watchpoint enabled. */
579 #define bpstat_explains_signal(bs) ((bs) != NULL)
581 /* Nonzero if we should step constantly (e.g. watchpoints on machines
582 without hardware support). This isn't related to a specific bpstat,
583 just to things like whether watchpoints are set. */
584 extern int bpstat_should_step (void);
586 /* Nonzero if there are enabled hardware watchpoints. */
587 extern int bpstat_have_active_hw_watchpoints (void);
589 /* Print a message indicating what happened. Returns nonzero to
590 say that only the source line should be printed after this (zero
591 return means print the frame as well as the source line). */
592 extern enum print_stop_action
bpstat_print (bpstat
);
594 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
595 at. *BSP upon return is a bpstat which points to the remaining
596 breakpoints stopped at (but which is not guaranteed to be good for
597 anything but further calls to bpstat_num).
598 Return 0 if passed a bpstat which does not indicate any breakpoints.
599 Return -1 if stopped at a breakpoint that has been deleted since
601 Return 1 otherwise. */
602 extern int bpstat_num (bpstat
*, int *);
604 /* Perform actions associated with having stopped at *BSP. Actually, we just
605 use this for breakpoint commands. Perhaps other actions will go here
606 later, but this is executed at a late time (from the command loop). */
607 extern void bpstat_do_actions (bpstat
*);
609 /* Modify BS so that the actions will not be performed. */
610 extern void bpstat_clear_actions (bpstat
);
612 /* Given a bpstat that records zero or more triggered eventpoints, this
613 function returns another bpstat which contains only the catchpoints
614 on that first list, if any.
616 extern void bpstat_get_triggered_catchpoints (bpstat
, bpstat
*);
618 /* Implementation: */
620 /* Values used to tell the printing routine how to behave for this bpstat. */
623 /* This is used when we want to do a normal printing of the reason
624 for stopping. The output will depend on the type of eventpoint
625 we are dealing with. This is the default value, most commonly
628 /* This is used when nothing should be printed for this bpstat entry. */
630 /* This is used when everything which needs to be printed has
631 already been printed. But we still want to print the frame. */
637 /* Linked list because there can be two breakpoints at the same
638 place, and a bpstat reflects the fact that both have been hit. */
640 /* Breakpoint that we are at. */
641 struct bp_location
*breakpoint_at
;
642 /* Commands left to be done. */
643 struct command_line
*commands
;
644 /* Old value associated with a watchpoint. */
645 struct value
*old_val
;
647 /* Nonzero if this breakpoint tells us to print the frame. */
650 /* Nonzero if this breakpoint tells us to stop. */
653 /* Tell bpstat_print and print_bp_stop_message how to print stuff
654 associated with this element of the bpstat chain. */
655 enum bp_print_how print_it
;
665 /* The possible return values for breakpoint_here_p.
666 We guarantee that zero always means "no breakpoint here". */
669 no_breakpoint_here
= 0,
670 ordinary_breakpoint_here
,
671 permanent_breakpoint_here
675 /* Prototypes for breakpoint-related functions. */
677 extern enum breakpoint_here
breakpoint_here_p (CORE_ADDR
);
679 extern int breakpoint_inserted_here_p (CORE_ADDR
);
681 extern int software_breakpoint_inserted_here_p (CORE_ADDR
);
683 extern int breakpoint_thread_match (CORE_ADDR
, ptid_t
);
685 extern void until_break_command (char *, int, int);
687 extern void breakpoint_re_set (void);
689 extern void breakpoint_re_set_thread (struct breakpoint
*);
691 extern int ep_is_exception_catchpoint (struct breakpoint
*);
693 extern struct breakpoint
*set_momentary_breakpoint
694 (struct symtab_and_line
, struct frame_id
, enum bptype
);
696 extern void set_ignore_count (int, int, int);
698 extern void set_default_breakpoint (int, CORE_ADDR
, struct symtab
*, int);
700 extern void mark_breakpoints_out (void);
702 extern void breakpoint_init_inferior (enum inf_context
);
704 extern struct cleanup
*make_cleanup_delete_breakpoint (struct breakpoint
*);
706 extern struct cleanup
*make_exec_cleanup_delete_breakpoint (struct breakpoint
*);
708 extern void delete_breakpoint (struct breakpoint
*);
710 extern void breakpoint_auto_delete (bpstat
);
712 extern void breakpoint_clear_ignore_counts (void);
714 extern void break_command (char *, int);
716 extern void hbreak_command_wrapper (char *, int);
717 extern void thbreak_command_wrapper (char *, int);
718 extern void rbreak_command_wrapper (char *, int);
719 extern void watch_command_wrapper (char *, int);
720 extern void awatch_command_wrapper (char *, int);
721 extern void rwatch_command_wrapper (char *, int);
722 extern void tbreak_command (char *, int);
724 extern int insert_breakpoints (void);
726 extern int remove_breakpoints (void);
728 /* This function can be used to physically insert eventpoints from the
729 specified traced inferior process, without modifying the breakpoint
730 package's state. This can be useful for those targets which support
731 following the processes of a fork() or vfork() system call, when both
732 of the resulting two processes are to be followed. */
733 extern int reattach_breakpoints (int);
735 /* This function can be used to update the breakpoint package's state
736 after an exec() system call has been executed.
738 This function causes the following:
740 - All eventpoints are marked "not inserted".
741 - All eventpoints with a symbolic address are reset such that
742 the symbolic address must be reevaluated before the eventpoints
744 - The solib breakpoints are explicitly removed from the breakpoint
746 - A step-resume breakpoint, if any, is explicitly removed from the
748 - All eventpoints without a symbolic address are removed from the
750 extern void update_breakpoints_after_exec (void);
752 /* This function can be used to physically remove hardware breakpoints
753 and watchpoints from the specified traced inferior process, without
754 modifying the breakpoint package's state. This can be useful for
755 those targets which support following the processes of a fork() or
756 vfork() system call, when one of the resulting two processes is to
757 be detached and allowed to run free.
759 It is an error to use this function on the process whose id is
761 extern int detach_breakpoints (int);
763 extern void enable_longjmp_breakpoint (void);
764 extern void disable_longjmp_breakpoint (void);
765 extern void enable_overlay_breakpoints (void);
766 extern void disable_overlay_breakpoints (void);
768 extern void set_longjmp_resume_breakpoint (CORE_ADDR
, struct frame_id
);
769 /* These functions respectively disable or reenable all currently
770 enabled watchpoints. When disabled, the watchpoints are marked
771 call_disabled. When reenabled, they are marked enabled.
773 The intended client of these functions is call_function_by_hand.
775 The inferior must be stopped, and all breakpoints removed, when
776 these functions are used.
778 The need for these functions is that on some targets (e.g., HP-UX),
779 gdb is unable to unwind through the dummy frame that is pushed as
780 part of the implementation of a call command. Watchpoints can
781 cause the inferior to stop in places where this frame is visible,
782 and that can cause execution control to become very confused.
784 Note that if a user sets breakpoints in an interactively called
785 function, the call_disabled watchpoints will have been reenabled
786 when the first such breakpoint is reached. However, on targets
787 that are unable to unwind through the call dummy frame, watches
788 of stack-based storage may then be deleted, because gdb will
789 believe that their watched storage is out of scope. (Sigh.) */
790 extern void disable_watchpoints_before_interactive_call_start (void);
792 extern void enable_watchpoints_after_interactive_call_stop (void);
794 /* For script interpreters that need to define breakpoint commands
795 after they've already read the commands into a struct command_line. */
796 extern enum command_control_type commands_from_control_command
797 (char *arg
, struct command_line
*cmd
);
799 extern void clear_breakpoint_hit_counts (void);
801 extern int get_number (char **);
803 extern int get_number_or_range (char **);
805 /* The following are for displays, which aren't really breakpoints, but
806 here is as good a place as any for them. */
808 extern void disable_current_display (void);
810 extern void do_displays (void);
812 extern void disable_display (int);
814 extern void clear_displays (void);
816 extern void disable_breakpoint (struct breakpoint
*);
818 extern void enable_breakpoint (struct breakpoint
*);
820 extern void make_breakpoint_permanent (struct breakpoint
*);
822 extern struct breakpoint
*create_solib_event_breakpoint (CORE_ADDR
);
824 extern struct breakpoint
*create_thread_event_breakpoint (CORE_ADDR
);
826 extern void remove_solib_event_breakpoints (void);
828 extern void remove_thread_event_breakpoints (void);
830 extern void disable_breakpoints_in_shlibs (void);
832 extern void create_solib_load_event_breakpoint (char *, int, char *, char *);
834 extern void create_solib_unload_event_breakpoint (char *, int,
837 extern void create_fork_event_catchpoint (int, char *);
839 extern void create_vfork_event_catchpoint (int, char *);
841 extern void create_exec_event_catchpoint (int, char *);
843 /* This function returns TRUE if ep is a catchpoint. */
844 extern int ep_is_catchpoint (struct breakpoint
*);
846 /* This function returns TRUE if ep is a catchpoint of a
847 shared library (aka dynamically-linked library) event,
848 such as a library load or unload. */
849 extern int ep_is_shlib_catchpoint (struct breakpoint
*);
851 extern struct breakpoint
*set_breakpoint_sal (struct symtab_and_line
);
853 /* Enable breakpoints and delete when hit. Called with ARG == NULL
854 deletes all breakpoints. */
855 extern void delete_command (char *arg
, int from_tty
);
857 /* Pull all H/W watchpoints from the target. Return non-zero if the
859 extern int remove_hw_watchpoints (void);
861 /* Manage a software single step breakpoint (or two). Insert may be called
862 twice before remove is called. */
863 extern void insert_single_step_breakpoint (CORE_ADDR
);
864 extern void remove_single_step_breakpoints (void);
866 /* Manage manual breakpoints, separate from the normal chain of
867 breakpoints. These functions are used in murky target-specific
868 ways. Please do not add more uses! */
869 extern void *deprecated_insert_raw_breakpoint (CORE_ADDR
);
870 extern int deprecated_remove_raw_breakpoint (void *);
872 /* Check if any hardware watchpoints have triggered, according to the
874 int watchpoints_triggered (struct target_waitstatus
*);
876 #endif /* !defined (BREAKPOINT_H) */