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 2 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, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
22 #if !defined (BREAKPOINT_H)
23 #define BREAKPOINT_H 1
28 #include "gdb-events.h"
33 /* This is the maximum number of bytes a breakpoint instruction can take.
34 Feel free to increase it. It's just used in a few places to size
35 arrays that should be independent of the target architecture. */
37 #define BREAKPOINT_MAX 16
39 /* Type of breakpoint. */
40 /* FIXME In the future, we should fold all other breakpoint-like things into
43 * single-step (for machines where we have to simulate single stepping)
44 (probably, though perhaps it is better for it to look as much as
45 possible like a single-step to wait_for_inferior). */
49 bp_none
= 0, /* Eventpoint has been deleted. */
50 bp_breakpoint
, /* Normal breakpoint */
51 bp_hardware_breakpoint
, /* Hardware assisted breakpoint */
52 bp_until
, /* used by until command */
53 bp_finish
, /* used by finish command */
54 bp_watchpoint
, /* Watchpoint */
55 bp_hardware_watchpoint
, /* Hardware assisted watchpoint */
56 bp_read_watchpoint
, /* read watchpoint, (hardware assisted) */
57 bp_access_watchpoint
, /* access watchpoint, (hardware assisted) */
58 bp_longjmp
, /* secret breakpoint to find longjmp() */
59 bp_longjmp_resume
, /* secret breakpoint to escape longjmp() */
61 /* Used by wait_for_inferior for stepping over subroutine calls, for
62 stepping over signal handlers, and for skipping prologues. */
65 /* Used to detect when a watchpoint expression has gone out of
66 scope. These breakpoints are usually not visible to the user.
68 This breakpoint has some interesting properties:
70 1) There's always a 1:1 mapping between watchpoints
71 on local variables and watchpoint_scope breakpoints.
73 2) It automatically deletes itself and the watchpoint it's
74 associated with when hit.
76 3) It can never be disabled. */
79 /* The breakpoint at the end of a call dummy. */
80 /* FIXME: What if the function we are calling longjmp()s out of the
81 call, or the user gets out with the "return" command? We currently
82 have no way of cleaning up the breakpoint in these (obscure) situations.
83 (Probably can solve this by noticing longjmp, "return", etc., it's
84 similar to noticing when a watchpoint on a local variable goes out
85 of scope (with hardware support for watchpoints)). */
88 /* Some dynamic linkers (HP, maybe Solaris) can arrange for special
89 code in the inferior to run when significant events occur in the
90 dynamic linker (for example a library is loaded or unloaded).
92 By placing a breakpoint in this magic code GDB will get control
93 when these significant events occur. GDB can then re-examine
94 the dynamic linker's data structures to discover any newly loaded
98 /* Some multi-threaded systems can arrange for a location in the
99 inferior to be executed when certain thread-related events occur
100 (such as thread creation or thread death).
102 By placing a breakpoint at one of these locations, GDB will get
103 control when these events occur. GDB can then update its thread
108 /* On the same principal, an overlay manager can arrange to call a
109 magic location in the inferior whenever there is an interesting
110 change in overlay status. GDB can update its overlay tables
111 and fiddle with breakpoints in overlays when this breakpoint
116 /* These breakpoints are used to implement the "catch load" command
117 on platforms whose dynamic linkers support such functionality. */
120 /* These breakpoints are used to implement the "catch unload" command
121 on platforms whose dynamic linkers support such functionality. */
124 /* These are not really breakpoints, but are catchpoints that
125 implement the "catch fork", "catch vfork" and "catch exec" commands
126 on platforms whose kernel support such functionality. (I.e.,
127 kernels which can raise an event when a fork or exec occurs, as
128 opposed to the debugger setting breakpoints on functions named
129 "fork" or "exec".) */
134 /* These are catchpoints to implement "catch catch" and "catch throw"
135 commands for C++ exception handling. */
142 /* States of enablement of breakpoint. */
146 bp_disabled
, /* The eventpoint is inactive, and cannot trigger. */
147 bp_enabled
, /* The eventpoint is active, and can trigger. */
148 bp_shlib_disabled
, /* The eventpoint's address is in an unloaded solib.
149 The eventpoint will be automatically enabled
150 and reset when that solib is loaded. */
151 bp_call_disabled
, /* The eventpoint has been disabled while a call
152 into the inferior is "in flight", because some
153 eventpoints interfere with the implementation of
154 a call on some targets. The eventpoint will be
155 automatically enabled and reset when the call
156 "lands" (either completes, or stops at another
158 bp_permanent
/* There is a breakpoint instruction hard-wired into
159 the target's code. Don't try to write another
160 breakpoint instruction on top of it, or restore
161 its value. Step over it using the architecture's
166 /* Disposition of breakpoint. Ie: what to do after hitting it. */
170 disp_del
, /* Delete it */
171 disp_del_at_next_stop
, /* Delete at next stop, whether hit or not */
172 disp_disable
, /* Disable it */
173 disp_donttouch
/* Leave it alone */
176 enum target_hw_bp_type
178 hw_write
= 0, /* Common HW watchpoint */
179 hw_read
= 1, /* Read HW watchpoint */
180 hw_access
= 2, /* Access HW watchpoint */
181 hw_execute
= 3 /* Execute HW breakpoint */
185 /* Information used by targets to insert and remove breakpoints. */
187 struct bp_target_info
189 /* Address at which the breakpoint was placed. This is normally the
190 same as ADDRESS from the bp_location, except when adjustment
191 happens in gdbarch_breakpoint_from_pc. The most common form of
192 adjustment is stripping an alternate ISA marker from the PC which
193 is used to determine the type of breakpoint to insert. */
194 CORE_ADDR placed_address
;
196 /* If the breakpoint lives in memory and reading that memory would
197 give back the breakpoint, instead of the original contents, then
198 the original contents are cached here. Only SHADOW_LEN bytes of
199 this buffer are valid, and only when the breakpoint is inserted. */
200 gdb_byte shadow_contents
[BREAKPOINT_MAX
];
202 /* The length of the data cached in SHADOW_CONTENTS. */
205 /* The size of the placed breakpoint, according to
206 gdbarch_breakpoint_from_pc, when the breakpoint was inserted. This is
207 generally the same as SHADOW_LEN, unless we did not need
208 to read from the target to implement the memory breakpoint
209 (e.g. if a remote stub handled the details). We may still
210 need the size to remove the breakpoint safely. */
214 /* GDB maintains two types of information about each breakpoint (or
215 watchpoint, or other related event). The first type corresponds
216 to struct breakpoint; this is a relatively high-level structure
217 which contains the source location(s), stopping conditions, user
218 commands to execute when the breakpoint is hit, and so forth.
220 The second type of information corresponds to struct bp_location.
221 Each breakpoint has one or (eventually) more locations associated
222 with it, which represent target-specific and machine-specific
223 mechanisms for stopping the program. For instance, a watchpoint
224 expression may require multiple hardware watchpoints in order to
225 catch all changes in the value of the expression being watched. */
229 bp_loc_software_breakpoint
,
230 bp_loc_hardware_breakpoint
,
231 bp_loc_hardware_watchpoint
,
232 bp_loc_other
/* Miscellaneous... */
237 /* Chain pointer to the next breakpoint location. */
238 struct bp_location
*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 /* Nonzero if this breakpoint is now inserted. */
251 /* Nonzero if this is not the first breakpoint in the list
252 for the given address. */
255 /* If we someday support real thread-specific breakpoints, then
256 the breakpoint location will need a thread identifier. */
258 /* Data for specific breakpoint types. These could be a union, but
259 simplicity is more important than memory usage for breakpoints. */
261 /* Note that zero is a perfectly valid code address on some platforms
262 (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
263 is not a special value for this field. Valid for all types except
267 /* For any breakpoint type with an address, this is the BFD section
268 associated with the address. Used primarily for overlay debugging. */
271 /* Address at which breakpoint was requested, either by the user or
272 by GDB for internal breakpoints. This will usually be the same
273 as ``address'' (above) except for cases in which
274 ADJUST_BREAKPOINT_ADDRESS has computed a different address at
275 which to place the breakpoint in order to comply with a
276 processor's architectual constraints. */
277 CORE_ADDR requested_address
;
279 /* Details of the placed breakpoint, when inserted. */
280 struct bp_target_info target_info
;
282 /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
283 struct bp_target_info overlay_target_info
;
286 /* This structure is a collection of function pointers that, if available,
287 will be called instead of the performing the default action for this
290 struct breakpoint_ops
292 /* The normal print routine for this breakpoint, called when we
294 enum print_stop_action (*print_it
) (struct breakpoint
*);
296 /* Display information about this breakpoint, for "info breakpoints". */
297 void (*print_one
) (struct breakpoint
*, CORE_ADDR
*);
299 /* Display information about this breakpoint after setting it (roughly
300 speaking; this is called from "mention"). */
301 void (*print_mention
) (struct breakpoint
*);
304 /* Note that the ->silent field is not currently used by any commands
305 (though the code is in there if it was to be, and set_raw_breakpoint
306 does set it to 0). I implemented it because I thought it would be
307 useful for a hack I had to put in; I'm going to leave it in because
308 I can see how there might be times when it would indeed be useful */
310 /* This is for a breakpoint or a watchpoint. */
314 struct breakpoint
*next
;
315 /* Type of breakpoint. */
317 /* Zero means disabled; remember the info but don't break here. */
318 enum enable_state enable_state
;
319 /* What to do with this breakpoint after we hit it. */
320 enum bpdisp disposition
;
321 /* Number assigned to distinguish breakpoints. */
324 /* Location(s) associated with this high-level breakpoint. */
325 struct bp_location
*loc
;
327 /* Line number of this address. */
331 /* Source file name of this address. */
335 /* Non-zero means a silent breakpoint (don't print frame info
337 unsigned char silent
;
338 /* Number of stops at this breakpoint that should
339 be continued automatically before really stopping. */
341 /* Chain of command lines to execute when this breakpoint is hit. */
342 struct command_line
*commands
;
343 /* Stack depth (address of frame). If nonzero, break only if fp
345 struct frame_id frame_id
;
346 /* Conditional. Break only if this expression's value is nonzero. */
347 struct expression
*cond
;
349 /* String we used to set the breakpoint (malloc'd). */
351 /* Language we used to set the breakpoint. */
352 enum language language
;
353 /* Input radix we used to set the breakpoint. */
355 /* String form of the breakpoint condition (malloc'd), or NULL if there
358 /* String form of exp (malloc'd), or NULL if none. */
361 /* The expression we are watching, or NULL if not a watchpoint. */
362 struct expression
*exp
;
363 /* The largest block within which it is valid, or NULL if it is
364 valid anywhere (e.g. consists just of global symbols). */
365 struct block
*exp_valid_block
;
366 /* Value of the watchpoint the last time we checked it. */
369 /* Holds the value chain for a hardware watchpoint expression. */
370 struct value
*val_chain
;
372 /* Holds the address of the related watchpoint_scope breakpoint
373 when using watchpoints on local variables (might the concept
374 of a related breakpoint be useful elsewhere, if not just call
375 it the watchpoint_scope breakpoint or something like that. FIXME). */
376 struct breakpoint
*related_breakpoint
;
378 /* Holds the frame address which identifies the frame this
379 watchpoint should be evaluated in, or `null' if the watchpoint
380 should be evaluated on the outermost frame. */
381 struct frame_id watchpoint_frame
;
383 /* Thread number for thread-specific breakpoint, or -1 if don't care */
386 /* Count of the number of times this breakpoint was taken, dumped
387 with the info, but not used for anything else. Useful for
388 seeing how many times you hit a break prior to the program
389 aborting, so you can back up to just before the abort. */
392 /* Filename of a dynamically-linked library (dll), used for
393 bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
394 library is significant. */
397 /* Filename of a dll whose state change (e.g., load or unload)
398 triggered this catchpoint. This field is only valid immediately
399 after this catchpoint has triggered. */
400 char *triggered_dll_pathname
;
402 /* Process id of a child process whose forking triggered this
403 catchpoint. This field is only valid immediately after this
404 catchpoint has triggered. */
405 int forked_inferior_pid
;
407 /* Filename of a program whose exec triggered this catchpoint.
408 This field is only valid immediately after this catchpoint has
412 /* Methods associated with this breakpoint. */
413 struct breakpoint_ops
*ops
;
415 /* Was breakpoint issued from a tty? Saved for the use of pending breakpoints. */
418 /* Flag value for pending breakpoint.
419 first bit : 0 non-temporary, 1 temporary.
420 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
423 /* Is breakpoint pending on shlib loads? */
427 /* The following stuff is an abstract data type "bpstat" ("breakpoint
428 status"). This provides the ability to determine whether we have
429 stopped at a breakpoint, and what we should do about it. */
431 typedef struct bpstats
*bpstat
;
434 /* Clear a bpstat so that it says we are not at any breakpoint.
435 Also free any storage that is part of a bpstat. */
436 extern void bpstat_clear (bpstat
*);
438 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
439 is part of the bpstat is copied as well. */
440 extern bpstat
bpstat_copy (bpstat
);
442 extern bpstat
bpstat_stop_status (CORE_ADDR pc
, ptid_t ptid
,
443 int stopped_by_watchpoint
);
445 /* This bpstat_what stuff tells wait_for_inferior what to do with a
446 breakpoint (a challenging task). */
448 enum bpstat_what_main_action
450 /* Perform various other tests; that is, this bpstat does not
451 say to perform any action (e.g. failed watchpoint and nothing
453 BPSTAT_WHAT_KEEP_CHECKING
,
455 /* Rather than distinguish between noisy and silent stops here, it
456 might be cleaner to have bpstat_print make that decision (also
457 taking into account stop_print_frame and source_only). But the
458 implications are a bit scary (interaction with auto-displays, etc.),
459 so I won't try it. */
462 BPSTAT_WHAT_STOP_SILENT
,
464 /* Stop and print. */
465 BPSTAT_WHAT_STOP_NOISY
,
467 /* Remove breakpoints, single step once, then put them back in and
468 go back to what we were doing. It's possible that this should be
469 removed from the main_action and put into a separate field, to more
470 cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
473 /* Set longjmp_resume breakpoint, remove all other breakpoints,
474 and continue. The "remove all other breakpoints" part is required
475 if we are also stepping over another breakpoint as well as doing
476 the longjmp handling. */
477 BPSTAT_WHAT_SET_LONGJMP_RESUME
,
479 /* Clear longjmp_resume breakpoint, then handle as
480 BPSTAT_WHAT_KEEP_CHECKING. */
481 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
,
483 /* Clear longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */
484 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
,
486 /* Clear step resume breakpoint, and keep checking. */
487 BPSTAT_WHAT_STEP_RESUME
,
489 /* Check the dynamic linker's data structures for new libraries, then
491 BPSTAT_WHAT_CHECK_SHLIBS
,
493 /* Check the dynamic linker's data structures for new libraries, then
494 resume out of the dynamic linker's callback, stop and print. */
495 BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
,
497 /* This is just used to keep track of how many enums there are. */
503 enum bpstat_what_main_action main_action
;
505 /* Did we hit a call dummy breakpoint? This only goes with a main_action
506 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
507 continuing from a call dummy without popping the frame is not a
512 /* The possible return values for print_bpstat, print_it_normal,
513 print_it_done, print_it_noop. */
514 enum print_stop_action
522 /* Tell what to do about this bpstat. */
523 struct bpstat_what
bpstat_what (bpstat
);
525 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
526 bpstat
bpstat_find_breakpoint (bpstat
, struct breakpoint
*);
528 /* Find a step_resume breakpoint associated with this bpstat.
529 (If there are multiple step_resume bp's on the list, this function
530 will arbitrarily pick one.)
532 It is an error to use this function if BPSTAT doesn't contain a
533 step_resume breakpoint.
535 See wait_for_inferior's use of this function.
537 extern struct breakpoint
*bpstat_find_step_resume_breakpoint (bpstat
);
539 /* Nonzero if a signal that we got in wait() was due to circumstances
540 explained by the BS. */
541 /* Currently that is true if we have hit a breakpoint, or if there is
542 a watchpoint enabled. */
543 #define bpstat_explains_signal(bs) ((bs) != NULL)
545 /* Nonzero if we should step constantly (e.g. watchpoints on machines
546 without hardware support). This isn't related to a specific bpstat,
547 just to things like whether watchpoints are set. */
548 extern int bpstat_should_step (void);
550 /* Nonzero if there are enabled hardware watchpoints. */
551 extern int bpstat_have_active_hw_watchpoints (void);
553 /* Print a message indicating what happened. Returns nonzero to
554 say that only the source line should be printed after this (zero
555 return means print the frame as well as the source line). */
556 extern enum print_stop_action
bpstat_print (bpstat
);
558 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
559 at. *BSP upon return is a bpstat which points to the remaining
560 breakpoints stopped at (but which is not guaranteed to be good for
561 anything but further calls to bpstat_num).
562 Return 0 if passed a bpstat which does not indicate any breakpoints.
563 Return -1 if stopped at a breakpoint that has been deleted since
565 Return 1 otherwise. */
566 extern int bpstat_num (bpstat
*, int *);
568 /* Perform actions associated with having stopped at *BSP. Actually, we just
569 use this for breakpoint commands. Perhaps other actions will go here
570 later, but this is executed at a late time (from the command loop). */
571 extern void bpstat_do_actions (bpstat
*);
573 /* Modify BS so that the actions will not be performed. */
574 extern void bpstat_clear_actions (bpstat
);
576 /* Given a bpstat that records zero or more triggered eventpoints, this
577 function returns another bpstat which contains only the catchpoints
578 on that first list, if any.
580 extern void bpstat_get_triggered_catchpoints (bpstat
, bpstat
*);
582 /* Implementation: */
584 /* Values used to tell the printing routine how to behave for this bpstat. */
587 /* This is used when we want to do a normal printing of the reason
588 for stopping. The output will depend on the type of eventpoint
589 we are dealing with. This is the default value, most commonly
592 /* This is used when nothing should be printed for this bpstat entry. */
594 /* This is used when everything which needs to be printed has
595 already been printed. But we still want to print the frame. */
601 /* Linked list because there can be two breakpoints at the same
602 place, and a bpstat reflects the fact that both have been hit. */
604 /* Breakpoint that we are at. */
605 struct breakpoint
*breakpoint_at
;
606 /* Commands left to be done. */
607 struct command_line
*commands
;
608 /* Old value associated with a watchpoint. */
609 struct value
*old_val
;
611 /* Nonzero if this breakpoint tells us to print the frame. */
614 /* Nonzero if this breakpoint tells us to stop. */
617 /* Tell bpstat_print and print_bp_stop_message how to print stuff
618 associated with this element of the bpstat chain. */
619 enum bp_print_how print_it
;
629 /* The possible return values for breakpoint_here_p.
630 We guarantee that zero always means "no breakpoint here". */
633 no_breakpoint_here
= 0,
634 ordinary_breakpoint_here
,
635 permanent_breakpoint_here
639 /* Prototypes for breakpoint-related functions. */
641 extern enum breakpoint_here
breakpoint_here_p (CORE_ADDR
);
643 extern int breakpoint_inserted_here_p (CORE_ADDR
);
645 extern int software_breakpoint_inserted_here_p (CORE_ADDR
);
647 extern int breakpoint_thread_match (CORE_ADDR
, ptid_t
);
649 extern void until_break_command (char *, int, int);
651 extern void breakpoint_re_set (void);
653 extern void breakpoint_re_set_thread (struct breakpoint
*);
655 extern int ep_is_exception_catchpoint (struct breakpoint
*);
657 extern struct breakpoint
*set_momentary_breakpoint
658 (struct symtab_and_line
, struct frame_id
, enum bptype
);
660 extern void set_ignore_count (int, int, int);
662 extern void set_default_breakpoint (int, CORE_ADDR
, struct symtab
*, int);
664 extern void mark_breakpoints_out (void);
666 extern void breakpoint_init_inferior (enum inf_context
);
668 extern struct cleanup
*make_cleanup_delete_breakpoint (struct breakpoint
*);
670 extern struct cleanup
*make_exec_cleanup_delete_breakpoint (struct breakpoint
*);
672 extern void delete_breakpoint (struct breakpoint
*);
674 extern void breakpoint_auto_delete (bpstat
);
676 extern void breakpoint_clear_ignore_counts (void);
678 extern void break_command (char *, int);
680 extern void hbreak_command_wrapper (char *, int);
681 extern void thbreak_command_wrapper (char *, int);
682 extern void rbreak_command_wrapper (char *, int);
683 extern void watch_command_wrapper (char *, int);
684 extern void awatch_command_wrapper (char *, int);
685 extern void rwatch_command_wrapper (char *, int);
686 extern void tbreak_command (char *, int);
688 extern int insert_breakpoints (void);
690 extern int remove_breakpoints (void);
692 /* This function can be used to physically insert eventpoints from the
693 specified traced inferior process, without modifying the breakpoint
694 package's state. This can be useful for those targets which support
695 following the processes of a fork() or vfork() system call, when both
696 of the resulting two processes are to be followed. */
697 extern int reattach_breakpoints (int);
699 /* This function can be used to update the breakpoint package's state
700 after an exec() system call has been executed.
702 This function causes the following:
704 - All eventpoints are marked "not inserted".
705 - All eventpoints with a symbolic address are reset such that
706 the symbolic address must be reevaluated before the eventpoints
708 - The solib breakpoints are explicitly removed from the breakpoint
710 - A step-resume breakpoint, if any, is explicitly removed from the
712 - All eventpoints without a symbolic address are removed from the
714 extern void update_breakpoints_after_exec (void);
716 /* This function can be used to physically remove hardware breakpoints
717 and watchpoints from the specified traced inferior process, without
718 modifying the breakpoint package's state. This can be useful for
719 those targets which support following the processes of a fork() or
720 vfork() system call, when one of the resulting two processes is to
721 be detached and allowed to run free.
723 It is an error to use this function on the process whose id is
725 extern int detach_breakpoints (int);
727 extern void enable_longjmp_breakpoint (void);
728 extern void disable_longjmp_breakpoint (void);
729 extern void enable_overlay_breakpoints (void);
730 extern void disable_overlay_breakpoints (void);
732 extern void set_longjmp_resume_breakpoint (CORE_ADDR
, struct frame_id
);
733 /* These functions respectively disable or reenable all currently
734 enabled watchpoints. When disabled, the watchpoints are marked
735 call_disabled. When reenabled, they are marked enabled.
737 The intended client of these functions is call_function_by_hand.
739 The inferior must be stopped, and all breakpoints removed, when
740 these functions are used.
742 The need for these functions is that on some targets (e.g., HP-UX),
743 gdb is unable to unwind through the dummy frame that is pushed as
744 part of the implementation of a call command. Watchpoints can
745 cause the inferior to stop in places where this frame is visible,
746 and that can cause execution control to become very confused.
748 Note that if a user sets breakpoints in an interactively called
749 function, the call_disabled watchpoints will have been reenabled
750 when the first such breakpoint is reached. However, on targets
751 that are unable to unwind through the call dummy frame, watches
752 of stack-based storage may then be deleted, because gdb will
753 believe that their watched storage is out of scope. (Sigh.) */
754 extern void disable_watchpoints_before_interactive_call_start (void);
756 extern void enable_watchpoints_after_interactive_call_stop (void);
758 /* For script interpreters that need to define breakpoint commands
759 after they've already read the commands into a struct command_line. */
760 extern enum command_control_type commands_from_control_command
761 (char *arg
, struct command_line
*cmd
);
763 extern void clear_breakpoint_hit_counts (void);
765 extern int get_number (char **);
767 extern int get_number_or_range (char **);
769 /* The following are for displays, which aren't really breakpoints, but
770 here is as good a place as any for them. */
772 extern void disable_current_display (void);
774 extern void do_displays (void);
776 extern void disable_display (int);
778 extern void clear_displays (void);
780 extern void disable_breakpoint (struct breakpoint
*);
782 extern void enable_breakpoint (struct breakpoint
*);
784 extern void make_breakpoint_permanent (struct breakpoint
*);
786 extern struct breakpoint
*create_solib_event_breakpoint (CORE_ADDR
);
788 extern struct breakpoint
*create_thread_event_breakpoint (CORE_ADDR
);
790 extern void remove_solib_event_breakpoints (void);
792 extern void remove_thread_event_breakpoints (void);
794 extern void disable_breakpoints_in_shlibs (int silent
);
796 extern void re_enable_breakpoints_in_shlibs (void);
798 extern void create_solib_load_event_breakpoint (char *, int, char *, char *);
800 extern void create_solib_unload_event_breakpoint (char *, int,
803 extern void create_fork_event_catchpoint (int, char *);
805 extern void create_vfork_event_catchpoint (int, char *);
807 extern void create_exec_event_catchpoint (int, char *);
809 /* This function returns TRUE if ep is a catchpoint. */
810 extern int ep_is_catchpoint (struct breakpoint
*);
812 /* This function returns TRUE if ep is a catchpoint of a
813 shared library (aka dynamically-linked library) event,
814 such as a library load or unload. */
815 extern int ep_is_shlib_catchpoint (struct breakpoint
*);
817 extern struct breakpoint
*set_breakpoint_sal (struct symtab_and_line
);
819 /* Enable breakpoints and delete when hit. Called with ARG == NULL
820 deletes all breakpoints. */
821 extern void delete_command (char *arg
, int from_tty
);
823 /* Pull all H/W watchpoints from the target. Return non-zero if the
825 extern int remove_hw_watchpoints (void);
827 /* Manage a software single step breakpoint (or two). Insert may be called
828 twice before remove is called. */
829 extern void insert_single_step_breakpoint (CORE_ADDR
);
830 extern void remove_single_step_breakpoints (void);
832 /* Manage manual breakpoints, separate from the normal chain of
833 breakpoints. These functions are used in murky target-specific
834 ways. Please do not add more uses! */
835 extern void *deprecated_insert_raw_breakpoint (CORE_ADDR
);
836 extern int deprecated_remove_raw_breakpoint (void *);
838 #endif /* !defined (BREAKPOINT_H) */