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
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 any breakpoint type with an address, this is the BFD section
277 associated with the address. Used primarily for overlay debugging. */
280 /* Address at which breakpoint was requested, either by the user or
281 by GDB for internal breakpoints. This will usually be the same
282 as ``address'' (above) except for cases in which
283 ADJUST_BREAKPOINT_ADDRESS has computed a different address at
284 which to place the breakpoint in order to comply with a
285 processor's architectual constraints. */
286 CORE_ADDR requested_address;
290 /* Details of the placed breakpoint, when inserted. */
291 struct bp_target_info target_info;
293 /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
294 struct bp_target_info overlay_target_info;
297 /* This structure is a collection of function pointers that, if available,
298 will be called instead of the performing the default action for this
301 struct breakpoint_ops
303 /* The normal print routine for this breakpoint, called when we
305 enum print_stop_action (*print_it) (struct breakpoint *);
307 /* Display information about this breakpoint, for "info breakpoints". */
308 void (*print_one) (struct breakpoint *, CORE_ADDR *);
310 /* Display information about this breakpoint after setting it (roughly
311 speaking; this is called from "mention"). */
312 void (*print_mention) (struct breakpoint *);
315 enum watchpoint_triggered
317 /* This watchpoint definitely did not trigger. */
318 watch_triggered_no = 0,
320 /* Some hardware watchpoint triggered, and it might have been this
321 one, but we do not know which it was. */
322 watch_triggered_unknown,
324 /* This hardware watchpoint definitely did trigger. */
328 /* Note that the ->silent field is not currently used by any commands
329 (though the code is in there if it was to be, and set_raw_breakpoint
330 does set it to 0). I implemented it because I thought it would be
331 useful for a hack I had to put in; I'm going to leave it in because
332 I can see how there might be times when it would indeed be useful */
334 /* This is for a breakpoint or a watchpoint. */
338 struct breakpoint *next;
339 /* Type of breakpoint. */
341 /* Zero means disabled; remember the info but don't break here. */
342 enum enable_state enable_state;
343 /* What to do with this breakpoint after we hit it. */
344 enum bpdisp disposition;
345 /* Number assigned to distinguish breakpoints. */
348 /* Location(s) associated with this high-level breakpoint. */
349 struct bp_location *loc;
351 /* Line number of this address. */
355 /* Source file name of this address. */
359 /* Non-zero means a silent breakpoint (don't print frame info
361 unsigned char silent;
362 /* Number of stops at this breakpoint that should
363 be continued automatically before really stopping. */
365 /* Chain of command lines to execute when this breakpoint is hit. */
366 struct command_line *commands;
367 /* Stack depth (address of frame). If nonzero, break only if fp
369 struct frame_id frame_id;
371 /* String we used to set the breakpoint (malloc'd). */
373 /* Language we used to set the breakpoint. */
374 enum language language;
375 /* Input radix we used to set the breakpoint. */
377 /* String form of the breakpoint condition (malloc'd), or NULL if there
380 /* String form of exp (malloc'd), or NULL if none. */
383 /* The expression we are watching, or NULL if not a watchpoint. */
384 struct expression *exp;
385 /* The largest block within which it is valid, or NULL if it is
386 valid anywhere (e.g. consists just of global symbols). */
387 struct block *exp_valid_block;
388 /* Value of the watchpoint the last time we checked it. */
391 /* Holds the value chain for a hardware watchpoint expression. */
392 struct value *val_chain;
394 /* Holds the address of the related watchpoint_scope breakpoint
395 when using watchpoints on local variables (might the concept
396 of a related breakpoint be useful elsewhere, if not just call
397 it the watchpoint_scope breakpoint or something like that. FIXME). */
398 struct breakpoint *related_breakpoint;
400 /* Holds the frame address which identifies the frame this
401 watchpoint should be evaluated in, or `null' if the watchpoint
402 should be evaluated on the outermost frame. */
403 struct frame_id watchpoint_frame;
405 /* For hardware watchpoints, the triggered status according to the
407 enum watchpoint_triggered watchpoint_triggered;
409 /* Thread number for thread-specific breakpoint, or -1 if don't care */
412 /* Count of the number of times this breakpoint was taken, dumped
413 with the info, but not used for anything else. Useful for
414 seeing how many times you hit a break prior to the program
415 aborting, so you can back up to just before the abort. */
418 /* Filename of a dynamically-linked library (dll), used for
419 bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
420 library is significant. */
423 /* Filename of a dll whose state change (e.g., load or unload)
424 triggered this catchpoint. This field is only valid immediately
425 after this catchpoint has triggered. */
426 char *triggered_dll_pathname;
428 /* Process id of a child process whose forking triggered this
429 catchpoint. This field is only valid immediately after this
430 catchpoint has triggered. */
431 int forked_inferior_pid;
433 /* Filename of a program whose exec triggered this catchpoint.
434 This field is only valid immediately after this catchpoint has
438 /* Methods associated with this breakpoint. */
439 struct breakpoint_ops *ops;
441 /* Is breakpoint's condition not yet parsed because we found
442 no location initially so had no context to parse
444 int condition_not_parsed;
447 typedef struct breakpoint *breakpoint_p;
448 DEF_VEC_P(breakpoint_p);
450 /* The following stuff is an abstract data type "bpstat" ("breakpoint
451 status"). This provides the ability to determine whether we have
452 stopped at a breakpoint, and what we should do about it. */
454 typedef struct bpstats *bpstat;
456 /* Frees any storage that is part of a bpstat.
457 Does not walk the 'next' chain. */
458 extern void bpstat_free (bpstat);
460 /* Clears a chain of bpstat, freeing storage
462 extern void bpstat_clear (bpstat *);
464 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
465 is part of the bpstat is copied as well. */
466 extern bpstat bpstat_copy (bpstat);
468 extern bpstat bpstat_stop_status (CORE_ADDR pc, ptid_t ptid);
470 /* This bpstat_what stuff tells wait_for_inferior what to do with a
471 breakpoint (a challenging task). */
473 enum bpstat_what_main_action
475 /* Perform various other tests; that is, this bpstat does not
476 say to perform any action (e.g. failed watchpoint and nothing
478 BPSTAT_WHAT_KEEP_CHECKING,
480 /* Rather than distinguish between noisy and silent stops here, it
481 might be cleaner to have bpstat_print make that decision (also
482 taking into account stop_print_frame and source_only). But the
483 implications are a bit scary (interaction with auto-displays, etc.),
484 so I won't try it. */
487 BPSTAT_WHAT_STOP_SILENT,
489 /* Stop and print. */
490 BPSTAT_WHAT_STOP_NOISY,
492 /* Remove breakpoints, single step once, then put them back in and
493 go back to what we were doing. It's possible that this should be
494 removed from the main_action and put into a separate field, to more
495 cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
498 /* Set longjmp_resume breakpoint, remove all other breakpoints,
499 and continue. The "remove all other breakpoints" part is required
500 if we are also stepping over another breakpoint as well as doing
501 the longjmp handling. */
502 BPSTAT_WHAT_SET_LONGJMP_RESUME,
504 /* Clear longjmp_resume breakpoint, then handle as
505 BPSTAT_WHAT_KEEP_CHECKING. */
506 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME,
508 /* Clear longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */
509 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE,
511 /* Clear step resume breakpoint, and keep checking. */
512 BPSTAT_WHAT_STEP_RESUME,
514 /* Check the dynamic linker's data structures for new libraries, then
516 BPSTAT_WHAT_CHECK_SHLIBS,
518 /* Check the dynamic linker's data structures for new libraries, then
519 resume out of the dynamic linker's callback, stop and print. */
520 BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK,
522 /* This is just used to keep track of how many enums there are. */
528 enum bpstat_what_main_action main_action;
530 /* Did we hit a call dummy breakpoint? This only goes with a main_action
531 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
532 continuing from a call dummy without popping the frame is not a
537 /* The possible return values for print_bpstat, print_it_normal,
538 print_it_done, print_it_noop. */
539 enum print_stop_action
547 /* Tell what to do about this bpstat. */
548 struct bpstat_what bpstat_what (bpstat);
550 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
551 bpstat bpstat_find_breakpoint (bpstat, struct breakpoint *);
553 /* Find a step_resume breakpoint associated with this bpstat.
554 (If there are multiple step_resume bp's on the list, this function
555 will arbitrarily pick one.)
557 It is an error to use this function if BPSTAT doesn't contain a
558 step_resume breakpoint.
560 See wait_for_inferior's use of this function.
562 extern struct breakpoint *bpstat_find_step_resume_breakpoint (bpstat);
564 /* Nonzero if a signal that we got in wait() was due to circumstances
565 explained by the BS. */
566 /* Currently that is true if we have hit a breakpoint, or if there is
567 a watchpoint enabled. */
568 #define bpstat_explains_signal(bs) ((bs) != NULL)
570 /* Nonzero if we should step constantly (e.g. watchpoints on machines
571 without hardware support). This isn't related to a specific bpstat,
572 just to things like whether watchpoints are set. */
573 extern int bpstat_should_step (void);
575 /* Print a message indicating what happened. Returns nonzero to
576 say that only the source line should be printed after this (zero
577 return means print the frame as well as the source line). */
578 extern enum print_stop_action bpstat_print (bpstat);
580 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
581 at. *BSP upon return is a bpstat which points to the remaining
582 breakpoints stopped at (but which is not guaranteed to be good for
583 anything but further calls to bpstat_num).
584 Return 0 if passed a bpstat which does not indicate any breakpoints.
585 Return -1 if stopped at a breakpoint that has been deleted since
587 Return 1 otherwise. */
588 extern int bpstat_num (bpstat *, int *);
590 /* Perform actions associated with having stopped at *BSP. Actually, we just
591 use this for breakpoint commands. Perhaps other actions will go here
592 later, but this is executed at a late time (from the command loop). */
593 extern void bpstat_do_actions (bpstat *);
595 /* Modify BS so that the actions will not be performed. */
596 extern void bpstat_clear_actions (bpstat);
598 /* Given a bpstat that records zero or more triggered eventpoints, this
599 function returns another bpstat which contains only the catchpoints
600 on that first list, if any.
602 extern void bpstat_get_triggered_catchpoints (bpstat, bpstat *);
604 /* Implementation: */
606 /* Values used to tell the printing routine how to behave for this bpstat. */
609 /* This is used when we want to do a normal printing of the reason
610 for stopping. The output will depend on the type of eventpoint
611 we are dealing with. This is the default value, most commonly
614 /* This is used when nothing should be printed for this bpstat entry. */
616 /* This is used when everything which needs to be printed has
617 already been printed. But we still want to print the frame. */
623 /* Linked list because there can be two breakpoints at the same
624 place, and a bpstat reflects the fact that both have been hit. */
626 /* Breakpoint that we are at. */
627 const struct bp_location *breakpoint_at;
628 /* Commands left to be done. */
629 struct command_line *commands;
630 /* Old value associated with a watchpoint. */
631 struct value *old_val;
633 /* Nonzero if this breakpoint tells us to print the frame. */
636 /* Nonzero if this breakpoint tells us to stop. */
639 /* Tell bpstat_print and print_bp_stop_message how to print stuff
640 associated with this element of the bpstat chain. */
641 enum bp_print_how print_it;
651 /* The possible return values for breakpoint_here_p.
652 We guarantee that zero always means "no breakpoint here". */
655 no_breakpoint_here = 0,
656 ordinary_breakpoint_here,
657 permanent_breakpoint_here
661 /* Prototypes for breakpoint-related functions. */
663 extern enum breakpoint_here breakpoint_here_p (CORE_ADDR);
665 extern int breakpoint_inserted_here_p (CORE_ADDR);
667 extern int regular_breakpoint_inserted_here_p (CORE_ADDR);
669 extern int software_breakpoint_inserted_here_p (CORE_ADDR);
671 extern int breakpoint_thread_match (CORE_ADDR, ptid_t);
673 extern void until_break_command (char *, int, int);
675 extern void breakpoint_re_set (void);
677 extern void breakpoint_re_set_thread (struct breakpoint *);
679 extern int ep_is_exception_catchpoint (struct breakpoint *);
681 extern struct breakpoint *set_momentary_breakpoint
682 (struct symtab_and_line, struct frame_id, enum bptype);
684 extern void set_ignore_count (int, int, int);
686 extern void set_default_breakpoint (int, CORE_ADDR, struct symtab *, int);
688 extern void breakpoint_init_inferior (enum inf_context);
690 extern struct cleanup *make_cleanup_delete_breakpoint (struct breakpoint *);
692 extern struct cleanup *make_exec_cleanup_delete_breakpoint (struct breakpoint *);
694 extern void delete_breakpoint (struct breakpoint *);
696 extern void breakpoint_auto_delete (bpstat);
698 extern void breakpoint_clear_ignore_counts (void);
700 extern void break_command (char *, int);
702 extern void hbreak_command_wrapper (char *, int);
703 extern void thbreak_command_wrapper (char *, int);
704 extern void rbreak_command_wrapper (char *, int);
705 extern void watch_command_wrapper (char *, int);
706 extern void awatch_command_wrapper (char *, int);
707 extern void rwatch_command_wrapper (char *, int);
708 extern void tbreak_command (char *, int);
710 extern void insert_breakpoints (void);
712 extern int remove_breakpoints (void);
714 /* This function can be used to physically insert eventpoints from the
715 specified traced inferior process, without modifying the breakpoint
716 package's state. This can be useful for those targets which support
717 following the processes of a fork() or vfork() system call, when both
718 of the resulting two processes are to be followed. */
719 extern int reattach_breakpoints (int);
721 /* This function can be used to update the breakpoint package's state
722 after an exec() system call has been executed.
724 This function causes the following:
726 - All eventpoints are marked "not inserted".
727 - All eventpoints with a symbolic address are reset such that
728 the symbolic address must be reevaluated before the eventpoints
730 - The solib breakpoints are explicitly removed from the breakpoint
732 - A step-resume breakpoint, if any, is explicitly removed from the
734 - All eventpoints without a symbolic address are removed from the
736 extern void update_breakpoints_after_exec (void);
738 /* This function can be used to physically remove hardware breakpoints
739 and watchpoints from the specified traced inferior process, without
740 modifying the breakpoint package's state. This can be useful for
741 those targets which support following the processes of a fork() or
742 vfork() system call, when one of the resulting two processes is to
743 be detached and allowed to run free.
745 It is an error to use this function on the process whose id is
747 extern int detach_breakpoints (int);
749 extern void enable_longjmp_breakpoint (void);
750 extern void disable_longjmp_breakpoint (void);
751 extern void enable_overlay_breakpoints (void);
752 extern void disable_overlay_breakpoints (void);
754 extern void set_longjmp_resume_breakpoint (CORE_ADDR, struct frame_id);
755 /* These functions respectively disable or reenable all currently
756 enabled watchpoints. When disabled, the watchpoints are marked
757 call_disabled. When reenabled, they are marked enabled.
759 The intended client of these functions is call_function_by_hand.
761 The inferior must be stopped, and all breakpoints removed, when
762 these functions are used.
764 The need for these functions is that on some targets (e.g., HP-UX),
765 gdb is unable to unwind through the dummy frame that is pushed as
766 part of the implementation of a call command. Watchpoints can
767 cause the inferior to stop in places where this frame is visible,
768 and that can cause execution control to become very confused.
770 Note that if a user sets breakpoints in an interactively called
771 function, the call_disabled watchpoints will have been reenabled
772 when the first such breakpoint is reached. However, on targets
773 that are unable to unwind through the call dummy frame, watches
774 of stack-based storage may then be deleted, because gdb will
775 believe that their watched storage is out of scope. (Sigh.) */
776 extern void disable_watchpoints_before_interactive_call_start (void);
778 extern void enable_watchpoints_after_interactive_call_stop (void);
780 /* For script interpreters that need to define breakpoint commands
781 after they've already read the commands into a struct command_line. */
782 extern enum command_control_type commands_from_control_command
783 (char *arg, struct command_line *cmd);
785 extern void clear_breakpoint_hit_counts (void);
787 extern int get_number (char **);
789 extern int get_number_or_range (char **);
791 /* The following are for displays, which aren't really breakpoints, but
792 here is as good a place as any for them. */
794 extern void disable_current_display (void);
796 extern void do_displays (void);
798 extern void disable_display (int);
800 extern void clear_displays (void);
802 extern void disable_breakpoint (struct breakpoint *);
804 extern void enable_breakpoint (struct breakpoint *);
806 extern void make_breakpoint_permanent (struct breakpoint *);
808 extern struct breakpoint *create_solib_event_breakpoint (CORE_ADDR);
810 extern struct breakpoint *create_thread_event_breakpoint (CORE_ADDR);
812 extern void remove_solib_event_breakpoints (void);
814 extern void remove_thread_event_breakpoints (void);
816 extern void disable_breakpoints_in_shlibs (void);
818 /* This function returns TRUE if ep is a catchpoint. */
819 extern int ep_is_catchpoint (struct breakpoint *);
821 /* This function returns TRUE if ep is a catchpoint of a
822 shared library (aka dynamically-linked library) event,
823 such as a library load or unload. */
824 extern int ep_is_shlib_catchpoint (struct breakpoint *);
826 /* Enable breakpoints and delete when hit. Called with ARG == NULL
827 deletes all breakpoints. */
828 extern void delete_command (char *arg, int from_tty);
830 /* Pull all H/W watchpoints from the target. Return non-zero if the
832 extern int remove_hw_watchpoints (void);
834 /* Manage a software single step breakpoint (or two). Insert may be called
835 twice before remove is called. */
836 extern void insert_single_step_breakpoint (CORE_ADDR);
837 extern void remove_single_step_breakpoints (void);
839 /* Manage manual breakpoints, separate from the normal chain of
840 breakpoints. These functions are used in murky target-specific
841 ways. Please do not add more uses! */
842 extern void *deprecated_insert_raw_breakpoint (CORE_ADDR);
843 extern int deprecated_remove_raw_breakpoint (void *);
845 /* Check if any hardware watchpoints have triggered, according to the
847 int watchpoints_triggered (struct target_waitstatus *);
849 #endif /* !defined (BREAKPOINT_H) */