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
;
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 typedef struct bp_location
*bp_location_p
;
335 DEF_VEC_P(bp_location_p
);
337 /* Note that the ->silent field is not currently used by any commands
338 (though the code is in there if it was to be, and set_raw_breakpoint
339 does set it to 0). I implemented it because I thought it would be
340 useful for a hack I had to put in; I'm going to leave it in because
341 I can see how there might be times when it would indeed be useful */
343 /* This is for a breakpoint or a watchpoint. */
347 struct breakpoint
*next
;
348 /* Type of breakpoint. */
350 /* Zero means disabled; remember the info but don't break here. */
351 enum enable_state enable_state
;
352 /* What to do with this breakpoint after we hit it. */
353 enum bpdisp disposition
;
354 /* Number assigned to distinguish breakpoints. */
357 /* Location(s) associated with this high-level breakpoint. */
358 struct bp_location
*loc
;
360 /* Line number of this address. */
364 /* Source file name of this address. */
368 /* Non-zero means a silent breakpoint (don't print frame info
370 unsigned char silent
;
371 /* Number of stops at this breakpoint that should
372 be continued automatically before really stopping. */
374 /* Chain of command lines to execute when this breakpoint is hit. */
375 struct command_line
*commands
;
376 /* Stack depth (address of frame). If nonzero, break only if fp
378 struct frame_id frame_id
;
380 /* String we used to set the breakpoint (malloc'd). */
382 /* Language we used to set the breakpoint. */
383 enum language language
;
384 /* Input radix we used to set the breakpoint. */
386 /* String form of the breakpoint condition (malloc'd), or NULL if there
389 /* String form of exp (malloc'd), or NULL if none. */
392 /* The expression we are watching, or NULL if not a watchpoint. */
393 struct expression
*exp
;
394 /* The largest block within which it is valid, or NULL if it is
395 valid anywhere (e.g. consists just of global symbols). */
396 struct block
*exp_valid_block
;
397 /* Value of the watchpoint the last time we checked it, or NULL
398 when we do not know the value yet or the value was not
399 readable. VAL is never lazy. */
401 /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
402 then an error occurred reading the value. */
405 /* Holds the address of the related watchpoint_scope breakpoint
406 when using watchpoints on local variables (might the concept
407 of a related breakpoint be useful elsewhere, if not just call
408 it the watchpoint_scope breakpoint or something like that. FIXME). */
409 struct breakpoint
*related_breakpoint
;
411 /* Holds the frame address which identifies the frame this
412 watchpoint should be evaluated in, or `null' if the watchpoint
413 should be evaluated on the outermost frame. */
414 struct frame_id watchpoint_frame
;
416 /* For hardware watchpoints, the triggered status according to the
418 enum watchpoint_triggered watchpoint_triggered
;
420 /* Thread number for thread-specific breakpoint, or -1 if don't care */
423 /* Count of the number of times this breakpoint was taken, dumped
424 with the info, but not used for anything else. Useful for
425 seeing how many times you hit a break prior to the program
426 aborting, so you can back up to just before the abort. */
429 /* Filename of a dynamically-linked library (dll), used for
430 bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
431 library is significant. */
434 /* Filename of a dll whose state change (e.g., load or unload)
435 triggered this catchpoint. This field is only valid immediately
436 after this catchpoint has triggered. */
437 char *triggered_dll_pathname
;
439 /* Process id of a child process whose forking triggered this
440 catchpoint. This field is only valid immediately after this
441 catchpoint has triggered. */
442 int forked_inferior_pid
;
444 /* Filename of a program whose exec triggered this catchpoint.
445 This field is only valid immediately after this catchpoint has
449 /* Methods associated with this breakpoint. */
450 struct breakpoint_ops
*ops
;
452 /* Is breakpoint's condition not yet parsed because we found
453 no location initially so had no context to parse
455 int condition_not_parsed
;
458 typedef struct breakpoint
*breakpoint_p
;
459 DEF_VEC_P(breakpoint_p
);
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 step resume breakpoint, and keep checking. */
520 BPSTAT_WHAT_STEP_RESUME
,
522 /* Check the dynamic linker's data structures for new libraries, then
524 BPSTAT_WHAT_CHECK_SHLIBS
,
526 /* Check the dynamic linker's data structures for new libraries, then
527 resume out of the dynamic linker's callback, stop and print. */
528 BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
,
530 /* This is just used to keep track of how many enums there are. */
536 enum bpstat_what_main_action main_action
;
538 /* Did we hit a call dummy breakpoint? This only goes with a main_action
539 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
540 continuing from a call dummy without popping the frame is not a
545 /* The possible return values for print_bpstat, print_it_normal,
546 print_it_done, print_it_noop. */
547 enum print_stop_action
555 /* Tell what to do about this bpstat. */
556 struct bpstat_what
bpstat_what (bpstat
);
558 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
559 bpstat
bpstat_find_breakpoint (bpstat
, struct breakpoint
*);
561 /* Find a step_resume breakpoint associated with this bpstat.
562 (If there are multiple step_resume bp's on the list, this function
563 will arbitrarily pick one.)
565 It is an error to use this function if BPSTAT doesn't contain a
566 step_resume breakpoint.
568 See wait_for_inferior's use of this function.
570 extern struct breakpoint
*bpstat_find_step_resume_breakpoint (bpstat
);
572 /* Nonzero if a signal that we got in wait() was due to circumstances
573 explained by the BS. */
574 /* Currently that is true if we have hit a breakpoint, or if there is
575 a watchpoint enabled. */
576 #define bpstat_explains_signal(bs) ((bs) != NULL)
578 /* Nonzero if we should step constantly (e.g. watchpoints on machines
579 without hardware support). This isn't related to a specific bpstat,
580 just to things like whether watchpoints are set. */
581 extern int bpstat_should_step (void);
583 /* Print a message indicating what happened. Returns nonzero to
584 say that only the source line should be printed after this (zero
585 return means print the frame as well as the source line). */
586 extern enum print_stop_action
bpstat_print (bpstat
);
588 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
589 at. *BSP upon return is a bpstat which points to the remaining
590 breakpoints stopped at (but which is not guaranteed to be good for
591 anything but further calls to bpstat_num).
592 Return 0 if passed a bpstat which does not indicate any breakpoints.
593 Return -1 if stopped at a breakpoint that has been deleted since
595 Return 1 otherwise. */
596 extern int bpstat_num (bpstat
*, int *);
598 /* Perform actions associated with having stopped at *BSP. Actually, we just
599 use this for breakpoint commands. Perhaps other actions will go here
600 later, but this is executed at a late time (from the command loop). */
601 extern void bpstat_do_actions (bpstat
*);
603 /* Modify BS so that the actions will not be performed. */
604 extern void bpstat_clear_actions (bpstat
);
606 /* Given a bpstat that records zero or more triggered eventpoints, this
607 function returns another bpstat which contains only the catchpoints
608 on that first list, if any.
610 extern void bpstat_get_triggered_catchpoints (bpstat
, bpstat
*);
612 /* Implementation: */
614 /* Values used to tell the printing routine how to behave for this bpstat. */
617 /* This is used when we want to do a normal printing of the reason
618 for stopping. The output will depend on the type of eventpoint
619 we are dealing with. This is the default value, most commonly
622 /* This is used when nothing should be printed for this bpstat entry. */
624 /* This is used when everything which needs to be printed has
625 already been printed. But we still want to print the frame. */
631 /* Linked list because there can be two breakpoints at the same
632 place, and a bpstat reflects the fact that both have been hit. */
634 /* Breakpoint that we are at. */
635 const struct bp_location
*breakpoint_at
;
636 /* Commands left to be done. */
637 struct command_line
*commands
;
638 /* Old value associated with a watchpoint. */
639 struct value
*old_val
;
641 /* Nonzero if this breakpoint tells us to print the frame. */
644 /* Nonzero if this breakpoint tells us to stop. */
647 /* Tell bpstat_print and print_bp_stop_message how to print stuff
648 associated with this element of the bpstat chain. */
649 enum bp_print_how print_it
;
659 /* The possible return values for breakpoint_here_p.
660 We guarantee that zero always means "no breakpoint here". */
663 no_breakpoint_here
= 0,
664 ordinary_breakpoint_here
,
665 permanent_breakpoint_here
669 /* Prototypes for breakpoint-related functions. */
671 extern enum breakpoint_here
breakpoint_here_p (CORE_ADDR
);
673 extern int breakpoint_inserted_here_p (CORE_ADDR
);
675 extern int regular_breakpoint_inserted_here_p (CORE_ADDR
);
677 extern int software_breakpoint_inserted_here_p (CORE_ADDR
);
679 extern int breakpoint_thread_match (CORE_ADDR
, ptid_t
);
681 extern void until_break_command (char *, int, int);
683 extern void breakpoint_re_set (void);
685 extern void breakpoint_re_set_thread (struct breakpoint
*);
687 extern struct breakpoint
*set_momentary_breakpoint
688 (struct symtab_and_line
, struct frame_id
, enum bptype
);
690 extern struct breakpoint
*set_momentary_breakpoint_at_pc
691 (CORE_ADDR pc
, enum bptype type
);
693 extern void set_ignore_count (int, int, int);
695 extern void set_default_breakpoint (int, CORE_ADDR
, struct symtab
*, int);
697 extern void breakpoint_init_inferior (enum inf_context
);
699 extern struct cleanup
*make_cleanup_delete_breakpoint (struct breakpoint
*);
701 extern void delete_breakpoint (struct breakpoint
*);
703 extern void breakpoint_auto_delete (bpstat
);
705 extern void breakpoint_clear_ignore_counts (void);
707 extern void break_command (char *, int);
709 extern void hbreak_command_wrapper (char *, int);
710 extern void thbreak_command_wrapper (char *, int);
711 extern void rbreak_command_wrapper (char *, int);
712 extern void watch_command_wrapper (char *, int);
713 extern void awatch_command_wrapper (char *, int);
714 extern void rwatch_command_wrapper (char *, int);
715 extern void tbreak_command (char *, int);
717 extern void set_breakpoint (char *address
, char *condition
,
718 int hardwareflag
, int tempflag
,
719 int thread
, int ignore_count
,
722 extern void insert_breakpoints (void);
724 extern int remove_breakpoints (void);
726 /* This function can be used to physically insert eventpoints from the
727 specified traced inferior process, without modifying the breakpoint
728 package's state. This can be useful for those targets which support
729 following the processes of a fork() or vfork() system call, when both
730 of the resulting two processes are to be followed. */
731 extern int reattach_breakpoints (int);
733 /* This function can be used to update the breakpoint package's state
734 after an exec() system call has been executed.
736 This function causes the following:
738 - All eventpoints are marked "not inserted".
739 - All eventpoints with a symbolic address are reset such that
740 the symbolic address must be reevaluated before the eventpoints
742 - The solib breakpoints are explicitly removed from the breakpoint
744 - A step-resume breakpoint, if any, is explicitly removed from the
746 - All eventpoints without a symbolic address are removed from the
748 extern void update_breakpoints_after_exec (void);
750 /* This function can be used to physically remove hardware breakpoints
751 and watchpoints from the specified traced inferior process, without
752 modifying the breakpoint package's state. This can be useful for
753 those targets which support following the processes of a fork() or
754 vfork() system call, when one of the resulting two processes is to
755 be detached and allowed to run free.
757 It is an error to use this function on the process whose id is
759 extern int detach_breakpoints (int);
761 extern void set_longjmp_breakpoint (void);
762 extern void delete_longjmp_breakpoint (int thread
);
764 extern void enable_overlay_breakpoints (void);
765 extern void disable_overlay_breakpoints (void);
767 /* These functions respectively disable or reenable all currently
768 enabled watchpoints. When disabled, the watchpoints are marked
769 call_disabled. When reenabled, they are marked enabled.
771 The intended client of these functions is call_function_by_hand.
773 The inferior must be stopped, and all breakpoints removed, when
774 these functions are used.
776 The need for these functions is that on some targets (e.g., HP-UX),
777 gdb is unable to unwind through the dummy frame that is pushed as
778 part of the implementation of a call command. Watchpoints can
779 cause the inferior to stop in places where this frame is visible,
780 and that can cause execution control to become very confused.
782 Note that if a user sets breakpoints in an interactively called
783 function, the call_disabled watchpoints will have been reenabled
784 when the first such breakpoint is reached. However, on targets
785 that are unable to unwind through the call dummy frame, watches
786 of stack-based storage may then be deleted, because gdb will
787 believe that their watched storage is out of scope. (Sigh.) */
788 extern void disable_watchpoints_before_interactive_call_start (void);
790 extern void enable_watchpoints_after_interactive_call_stop (void);
792 /* For script interpreters that need to define breakpoint commands
793 after they've already read the commands into a struct command_line. */
794 extern enum command_control_type commands_from_control_command
795 (char *arg
, struct command_line
*cmd
);
797 extern void clear_breakpoint_hit_counts (void);
799 extern int get_number (char **);
801 extern int get_number_or_range (char **);
803 /* The following are for displays, which aren't really breakpoints, but
804 here is as good a place as any for them. */
806 extern void disable_current_display (void);
808 extern void do_displays (void);
810 extern void disable_display (int);
812 extern void clear_displays (void);
814 extern void disable_breakpoint (struct breakpoint
*);
816 extern void enable_breakpoint (struct breakpoint
*);
818 extern void make_breakpoint_permanent (struct breakpoint
*);
820 extern struct breakpoint
*create_solib_event_breakpoint (CORE_ADDR
);
822 extern struct breakpoint
*create_thread_event_breakpoint (CORE_ADDR
);
824 extern void remove_solib_event_breakpoints (void);
826 extern void remove_thread_event_breakpoints (void);
828 extern void disable_breakpoints_in_shlibs (void);
830 /* This function returns TRUE if ep is a catchpoint. */
831 extern int ep_is_catchpoint (struct breakpoint
*);
833 /* This function returns TRUE if ep is a catchpoint of a
834 shared library (aka dynamically-linked library) event,
835 such as a library load or unload. */
836 extern int ep_is_shlib_catchpoint (struct breakpoint
*);
838 /* Enable breakpoints and delete when hit. Called with ARG == NULL
839 deletes all breakpoints. */
840 extern void delete_command (char *arg
, int from_tty
);
842 /* Pull all H/W watchpoints from the target. Return non-zero if the
844 extern int remove_hw_watchpoints (void);
846 /* Manage a software single step breakpoint (or two). Insert may be called
847 twice before remove is called. */
848 extern void insert_single_step_breakpoint (CORE_ADDR
);
849 extern void remove_single_step_breakpoints (void);
851 /* Manage manual breakpoints, separate from the normal chain of
852 breakpoints. These functions are used in murky target-specific
853 ways. Please do not add more uses! */
854 extern void *deprecated_insert_raw_breakpoint (CORE_ADDR
);
855 extern int deprecated_remove_raw_breakpoint (void *);
857 /* Check if any hardware watchpoints have triggered, according to the
859 int watchpoints_triggered (struct target_waitstatus
*);
861 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
862 by replacing any memory breakpoints with their shadowed contents. */
863 void breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
,
866 extern int breakpoints_always_inserted_mode (void);
868 #endif /* !defined (BREAKPOINT_H) */