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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.
4
5 This file is part of GDB.
6
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.
11
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.
16
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. */
21
22 #if !defined (BREAKPOINT_H)
23 #define BREAKPOINT_H 1
24
25 #include "frame.h"
26 #include "value.h"
27
28 #include "gdb-events.h"
29
30 struct value;
31 struct block;
32
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. */
36
37 #define BREAKPOINT_MAX 16
38 \f
39 /* Type of breakpoint. */
40 /* FIXME In the future, we should fold all other breakpoint-like things into
41 here. This includes:
42
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). */
46
47 enum bptype
48 {
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() */
60
61 /* Used by wait_for_inferior for stepping over subroutine calls, for
62 stepping over signal handlers, and for skipping prologues. */
63 bp_step_resume,
64
65 /* Used by wait_for_inferior for stepping over signal handlers. */
66 bp_through_sigtramp,
67
68 /* Used to detect when a watchpoint expression has gone out of
69 scope. These breakpoints are usually not visible to the user.
70
71 This breakpoint has some interesting properties:
72
73 1) There's always a 1:1 mapping between watchpoints
74 on local variables and watchpoint_scope breakpoints.
75
76 2) It automatically deletes itself and the watchpoint it's
77 associated with when hit.
78
79 3) It can never be disabled. */
80 bp_watchpoint_scope,
81
82 /* The breakpoint at the end of a call dummy. */
83 /* FIXME: What if the function we are calling longjmp()s out of the
84 call, or the user gets out with the "return" command? We currently
85 have no way of cleaning up the breakpoint in these (obscure) situations.
86 (Probably can solve this by noticing longjmp, "return", etc., it's
87 similar to noticing when a watchpoint on a local variable goes out
88 of scope (with hardware support for watchpoints)). */
89 bp_call_dummy,
90
91 /* Some dynamic linkers (HP, maybe Solaris) can arrange for special
92 code in the inferior to run when significant events occur in the
93 dynamic linker (for example a library is loaded or unloaded).
94
95 By placing a breakpoint in this magic code GDB will get control
96 when these significant events occur. GDB can then re-examine
97 the dynamic linker's data structures to discover any newly loaded
98 dynamic libraries. */
99 bp_shlib_event,
100
101 /* Some multi-threaded systems can arrange for a location in the
102 inferior to be executed when certain thread-related events occur
103 (such as thread creation or thread death).
104
105 By placing a breakpoint at one of these locations, GDB will get
106 control when these events occur. GDB can then update its thread
107 lists etc. */
108
109 bp_thread_event,
110
111 /* On the same principal, an overlay manager can arrange to call a
112 magic location in the inferior whenever there is an interesting
113 change in overlay status. GDB can update its overlay tables
114 and fiddle with breakpoints in overlays when this breakpoint
115 is hit. */
116
117 bp_overlay_event,
118
119 /* These breakpoints are used to implement the "catch load" command
120 on platforms whose dynamic linkers support such functionality. */
121 bp_catch_load,
122
123 /* These breakpoints are used to implement the "catch unload" command
124 on platforms whose dynamic linkers support such functionality. */
125 bp_catch_unload,
126
127 /* These are not really breakpoints, but are catchpoints that
128 implement the "catch fork", "catch vfork" and "catch exec" commands
129 on platforms whose kernel support such functionality. (I.e.,
130 kernels which can raise an event when a fork or exec occurs, as
131 opposed to the debugger setting breakpoints on functions named
132 "fork" or "exec".) */
133 bp_catch_fork,
134 bp_catch_vfork,
135 bp_catch_exec,
136
137 /* These are catchpoints to implement "catch catch" and "catch throw"
138 commands for C++ exception handling. */
139 bp_catch_catch,
140 bp_catch_throw
141
142
143 };
144
145 /* States of enablement of breakpoint. */
146
147 enum enable_state
148 {
149 bp_disabled, /* The eventpoint is inactive, and cannot trigger. */
150 bp_enabled, /* The eventpoint is active, and can trigger. */
151 bp_shlib_disabled, /* The eventpoint's address is in an unloaded solib.
152 The eventpoint will be automatically enabled
153 and reset when that solib is loaded. */
154 bp_call_disabled, /* The eventpoint has been disabled while a call
155 into the inferior is "in flight", because some
156 eventpoints interfere with the implementation of
157 a call on some targets. The eventpoint will be
158 automatically enabled and reset when the call
159 "lands" (either completes, or stops at another
160 eventpoint). */
161 bp_permanent /* There is a breakpoint instruction hard-wired into
162 the target's code. Don't try to write another
163 breakpoint instruction on top of it, or restore
164 its value. Step over it using the architecture's
165 SKIP_INSN macro. */
166 };
167
168
169 /* Disposition of breakpoint. Ie: what to do after hitting it. */
170
171 enum bpdisp
172 {
173 disp_del, /* Delete it */
174 disp_del_at_next_stop, /* Delete at next stop, whether hit or not */
175 disp_disable, /* Disable it */
176 disp_donttouch /* Leave it alone */
177 };
178
179 enum target_hw_bp_type
180 {
181 hw_write = 0, /* Common HW watchpoint */
182 hw_read = 1, /* Read HW watchpoint */
183 hw_access = 2, /* Access HW watchpoint */
184 hw_execute = 3 /* Execute HW breakpoint */
185 };
186
187
188 /* Information used by targets to insert and remove breakpoints. */
189
190 struct bp_target_info
191 {
192 /* Address at which the breakpoint was placed. This is normally the
193 same as ADDRESS from the bp_location, except when adjustment
194 happens in BREAKPOINT_FROM_PC. The most common form of
195 adjustment is stripping an alternate ISA marker from the PC which
196 is used to determine the type of breakpoint to insert. */
197 CORE_ADDR placed_address;
198
199 /* If the breakpoint lives in memory and reading that memory would
200 give back the breakpoint, instead of the original contents, then
201 the original contents are cached here. Only SHADOW_LEN bytes of
202 this buffer are valid, and only when the breakpoint is inserted. */
203 gdb_byte shadow_contents[BREAKPOINT_MAX];
204
205 /* The length of the data cached in SHADOW_CONTENTS. */
206 int shadow_len;
207
208 /* The size of the placed breakpoint, according to
209 BREAKPOINT_FROM_PC, when the breakpoint was inserted. This is
210 generally the same as SHADOW_LEN, unless we did not need
211 to read from the target to implement the memory breakpoint
212 (e.g. if a remote stub handled the details). We may still
213 need the size to remove the breakpoint safely. */
214 int placed_size;
215 };
216
217 /* GDB maintains two types of information about each breakpoint (or
218 watchpoint, or other related event). The first type corresponds
219 to struct breakpoint; this is a relatively high-level structure
220 which contains the source location(s), stopping conditions, user
221 commands to execute when the breakpoint is hit, and so forth.
222
223 The second type of information corresponds to struct bp_location.
224 Each breakpoint has one or (eventually) more locations associated
225 with it, which represent target-specific and machine-specific
226 mechanisms for stopping the program. For instance, a watchpoint
227 expression may require multiple hardware watchpoints in order to
228 catch all changes in the value of the expression being watched. */
229
230 enum bp_loc_type
231 {
232 bp_loc_software_breakpoint,
233 bp_loc_hardware_breakpoint,
234 bp_loc_hardware_watchpoint,
235 bp_loc_other /* Miscellaneous... */
236 };
237
238 struct bp_location
239 {
240 /* Chain pointer to the next breakpoint location. */
241 struct bp_location *next;
242
243 /* Type of this breakpoint location. */
244 enum bp_loc_type loc_type;
245
246 /* Each breakpoint location must belong to exactly one higher-level
247 breakpoint. This and the DUPLICATE flag are more straightforward
248 than reference counting. */
249 struct breakpoint *owner;
250
251 /* Nonzero if this breakpoint is now inserted. */
252 char inserted;
253
254 /* Nonzero if this is not the first breakpoint in the list
255 for the given address. */
256 char duplicate;
257
258 /* If we someday support real thread-specific breakpoints, then
259 the breakpoint location will need a thread identifier. */
260
261 /* Data for specific breakpoint types. These could be a union, but
262 simplicity is more important than memory usage for breakpoints. */
263
264 /* Note that zero is a perfectly valid code address on some platforms
265 (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
266 is not a special value for this field. Valid for all types except
267 bp_loc_other. */
268 CORE_ADDR address;
269
270 /* For any breakpoint type with an address, this is the BFD section
271 associated with the address. Used primarily for overlay debugging. */
272 asection *section;
273
274 /* Address at which breakpoint was requested, either by the user or
275 by GDB for internal breakpoints. This will usually be the same
276 as ``address'' (above) except for cases in which
277 ADJUST_BREAKPOINT_ADDRESS has computed a different address at
278 which to place the breakpoint in order to comply with a
279 processor's architectual constraints. */
280 CORE_ADDR requested_address;
281
282 /* Details of the placed breakpoint, when inserted. */
283 struct bp_target_info target_info;
284
285 /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
286 struct bp_target_info overlay_target_info;
287 };
288
289 /* This structure is a collection of function pointers that, if available,
290 will be called instead of the performing the default action for this
291 bptype. */
292
293 struct breakpoint_ops
294 {
295 /* The normal print routine for this breakpoint, called when we
296 hit it. */
297 enum print_stop_action (*print_it) (struct breakpoint *);
298
299 /* Display information about this breakpoint, for "info breakpoints". */
300 void (*print_one) (struct breakpoint *, CORE_ADDR *);
301
302 /* Display information about this breakpoint after setting it (roughly
303 speaking; this is called from "mention"). */
304 void (*print_mention) (struct breakpoint *);
305 };
306
307 /* Note that the ->silent field is not currently used by any commands
308 (though the code is in there if it was to be, and set_raw_breakpoint
309 does set it to 0). I implemented it because I thought it would be
310 useful for a hack I had to put in; I'm going to leave it in because
311 I can see how there might be times when it would indeed be useful */
312
313 /* This is for a breakpoint or a watchpoint. */
314
315 struct breakpoint
316 {
317 struct breakpoint *next;
318 /* Type of breakpoint. */
319 enum bptype type;
320 /* Zero means disabled; remember the info but don't break here. */
321 enum enable_state enable_state;
322 /* What to do with this breakpoint after we hit it. */
323 enum bpdisp disposition;
324 /* Number assigned to distinguish breakpoints. */
325 int number;
326
327 /* Location(s) associated with this high-level breakpoint. */
328 struct bp_location *loc;
329
330 /* Line number of this address. */
331
332 int line_number;
333
334 /* Source file name of this address. */
335
336 char *source_file;
337
338 /* Non-zero means a silent breakpoint (don't print frame info
339 if we stop here). */
340 unsigned char silent;
341 /* Number of stops at this breakpoint that should
342 be continued automatically before really stopping. */
343 int ignore_count;
344 /* Chain of command lines to execute when this breakpoint is hit. */
345 struct command_line *commands;
346 /* Stack depth (address of frame). If nonzero, break only if fp
347 equals this. */
348 struct frame_id frame_id;
349 /* Conditional. Break only if this expression's value is nonzero. */
350 struct expression *cond;
351
352 /* String we used to set the breakpoint (malloc'd). */
353 char *addr_string;
354 /* Language we used to set the breakpoint. */
355 enum language language;
356 /* Input radix we used to set the breakpoint. */
357 int input_radix;
358 /* String form of the breakpoint condition (malloc'd), or NULL if there
359 is no condition. */
360 char *cond_string;
361 /* String form of exp (malloc'd), or NULL if none. */
362 char *exp_string;
363
364 /* The expression we are watching, or NULL if not a watchpoint. */
365 struct expression *exp;
366 /* The largest block within which it is valid, or NULL if it is
367 valid anywhere (e.g. consists just of global symbols). */
368 struct block *exp_valid_block;
369 /* Value of the watchpoint the last time we checked it. */
370 struct value *val;
371
372 /* Holds the value chain for a hardware watchpoint expression. */
373 struct value *val_chain;
374
375 /* Holds the address of the related watchpoint_scope breakpoint
376 when using watchpoints on local variables (might the concept
377 of a related breakpoint be useful elsewhere, if not just call
378 it the watchpoint_scope breakpoint or something like that. FIXME). */
379 struct breakpoint *related_breakpoint;
380
381 /* Holds the frame address which identifies the frame this
382 watchpoint should be evaluated in, or `null' if the watchpoint
383 should be evaluated on the outermost frame. */
384 struct frame_id watchpoint_frame;
385
386 /* Thread number for thread-specific breakpoint, or -1 if don't care */
387 int thread;
388
389 /* Count of the number of times this breakpoint was taken, dumped
390 with the info, but not used for anything else. Useful for
391 seeing how many times you hit a break prior to the program
392 aborting, so you can back up to just before the abort. */
393 int hit_count;
394
395 /* Filename of a dynamically-linked library (dll), used for
396 bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
397 library is significant. */
398 char *dll_pathname;
399
400 /* Filename of a dll whose state change (e.g., load or unload)
401 triggered this catchpoint. This field is only valid immediately
402 after this catchpoint has triggered. */
403 char *triggered_dll_pathname;
404
405 /* Process id of a child process whose forking triggered this
406 catchpoint. This field is only valid immediately after this
407 catchpoint has triggered. */
408 int forked_inferior_pid;
409
410 /* Filename of a program whose exec triggered this catchpoint.
411 This field is only valid immediately after this catchpoint has
412 triggered. */
413 char *exec_pathname;
414
415 /* Methods associated with this breakpoint. */
416 struct breakpoint_ops *ops;
417
418 /* Was breakpoint issued from a tty? Saved for the use of pending breakpoints. */
419 int from_tty;
420
421 /* Flag value for pending breakpoint.
422 first bit : 0 non-temporary, 1 temporary.
423 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
424 int flag;
425
426 /* Is breakpoint pending on shlib loads? */
427 int pending;
428 };
429 \f
430 /* The following stuff is an abstract data type "bpstat" ("breakpoint
431 status"). This provides the ability to determine whether we have
432 stopped at a breakpoint, and what we should do about it. */
433
434 typedef struct bpstats *bpstat;
435
436 /* Interface: */
437 /* Clear a bpstat so that it says we are not at any breakpoint.
438 Also free any storage that is part of a bpstat. */
439 extern void bpstat_clear (bpstat *);
440
441 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
442 is part of the bpstat is copied as well. */
443 extern bpstat bpstat_copy (bpstat);
444
445 extern bpstat bpstat_stop_status (CORE_ADDR pc, ptid_t ptid,
446 int stopped_by_watchpoint);
447 \f
448 /* This bpstat_what stuff tells wait_for_inferior what to do with a
449 breakpoint (a challenging task). */
450
451 enum bpstat_what_main_action
452 {
453 /* Perform various other tests; that is, this bpstat does not
454 say to perform any action (e.g. failed watchpoint and nothing
455 else). */
456 BPSTAT_WHAT_KEEP_CHECKING,
457
458 /* Rather than distinguish between noisy and silent stops here, it
459 might be cleaner to have bpstat_print make that decision (also
460 taking into account stop_print_frame and source_only). But the
461 implications are a bit scary (interaction with auto-displays, etc.),
462 so I won't try it. */
463
464 /* Stop silently. */
465 BPSTAT_WHAT_STOP_SILENT,
466
467 /* Stop and print. */
468 BPSTAT_WHAT_STOP_NOISY,
469
470 /* Remove breakpoints, single step once, then put them back in and
471 go back to what we were doing. It's possible that this should be
472 removed from the main_action and put into a separate field, to more
473 cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
474 BPSTAT_WHAT_SINGLE,
475
476 /* Set longjmp_resume breakpoint, remove all other breakpoints,
477 and continue. The "remove all other breakpoints" part is required
478 if we are also stepping over another breakpoint as well as doing
479 the longjmp handling. */
480 BPSTAT_WHAT_SET_LONGJMP_RESUME,
481
482 /* Clear longjmp_resume breakpoint, then handle as
483 BPSTAT_WHAT_KEEP_CHECKING. */
484 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME,
485
486 /* Clear longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */
487 BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE,
488
489 /* Clear step resume breakpoint, and keep checking. */
490 BPSTAT_WHAT_STEP_RESUME,
491
492 /* Clear through_sigtramp breakpoint, muck with trap_expected, and keep
493 checking. */
494 BPSTAT_WHAT_THROUGH_SIGTRAMP,
495
496 /* Check the dynamic linker's data structures for new libraries, then
497 keep checking. */
498 BPSTAT_WHAT_CHECK_SHLIBS,
499
500 /* Check the dynamic linker's data structures for new libraries, then
501 resume out of the dynamic linker's callback, stop and print. */
502 BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK,
503
504 /* This is just used to keep track of how many enums there are. */
505 BPSTAT_WHAT_LAST
506 };
507
508 struct bpstat_what
509 {
510 enum bpstat_what_main_action main_action;
511
512 /* Did we hit a call dummy breakpoint? This only goes with a main_action
513 of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
514 continuing from a call dummy without popping the frame is not a
515 useful one). */
516 int call_dummy;
517 };
518
519 /* The possible return values for print_bpstat, print_it_normal,
520 print_it_done, print_it_noop. */
521 enum print_stop_action
522 {
523 PRINT_UNKNOWN = -1,
524 PRINT_SRC_AND_LOC,
525 PRINT_SRC_ONLY,
526 PRINT_NOTHING
527 };
528
529 /* Tell what to do about this bpstat. */
530 struct bpstat_what bpstat_what (bpstat);
531 \f
532 /* Find the bpstat associated with a breakpoint. NULL otherwise. */
533 bpstat bpstat_find_breakpoint (bpstat, struct breakpoint *);
534
535 /* Find a step_resume breakpoint associated with this bpstat.
536 (If there are multiple step_resume bp's on the list, this function
537 will arbitrarily pick one.)
538
539 It is an error to use this function if BPSTAT doesn't contain a
540 step_resume breakpoint.
541
542 See wait_for_inferior's use of this function.
543 */
544 extern struct breakpoint *bpstat_find_step_resume_breakpoint (bpstat);
545
546 /* Nonzero if a signal that we got in wait() was due to circumstances
547 explained by the BS. */
548 /* Currently that is true if we have hit a breakpoint, or if there is
549 a watchpoint enabled. */
550 #define bpstat_explains_signal(bs) ((bs) != NULL)
551
552 /* Nonzero if we should step constantly (e.g. watchpoints on machines
553 without hardware support). This isn't related to a specific bpstat,
554 just to things like whether watchpoints are set. */
555 extern int bpstat_should_step (void);
556
557 /* Nonzero if there are enabled hardware watchpoints. */
558 extern int bpstat_have_active_hw_watchpoints (void);
559
560 /* Print a message indicating what happened. Returns nonzero to
561 say that only the source line should be printed after this (zero
562 return means print the frame as well as the source line). */
563 extern enum print_stop_action bpstat_print (bpstat);
564
565 /* Return the breakpoint number of the first breakpoint we are stopped
566 at. *BSP upon return is a bpstat which points to the remaining
567 breakpoints stopped at (but which is not guaranteed to be good for
568 anything but further calls to bpstat_num).
569 Return 0 if passed a bpstat which does not indicate any breakpoints. */
570 extern int bpstat_num (bpstat *);
571
572 /* Perform actions associated with having stopped at *BSP. Actually, we just
573 use this for breakpoint commands. Perhaps other actions will go here
574 later, but this is executed at a late time (from the command loop). */
575 extern void bpstat_do_actions (bpstat *);
576
577 /* Modify BS so that the actions will not be performed. */
578 extern void bpstat_clear_actions (bpstat);
579
580 /* Given a bpstat that records zero or more triggered eventpoints, this
581 function returns another bpstat which contains only the catchpoints
582 on that first list, if any.
583 */
584 extern void bpstat_get_triggered_catchpoints (bpstat, bpstat *);
585
586 /* Implementation: */
587
588 /* Values used to tell the printing routine how to behave for this bpstat. */
589 enum bp_print_how
590 {
591 /* This is used when we want to do a normal printing of the reason
592 for stopping. The output will depend on the type of eventpoint
593 we are dealing with. This is the default value, most commonly
594 used. */
595 print_it_normal,
596 /* This is used when nothing should be printed for this bpstat entry. */
597 print_it_noop,
598 /* This is used when everything which needs to be printed has
599 already been printed. But we still want to print the frame. */
600 print_it_done
601 };
602
603 struct bpstats
604 {
605 /* Linked list because there can be two breakpoints at the same
606 place, and a bpstat reflects the fact that both have been hit. */
607 bpstat next;
608 /* Breakpoint that we are at. */
609 struct breakpoint *breakpoint_at;
610 /* Commands left to be done. */
611 struct command_line *commands;
612 /* Old value associated with a watchpoint. */
613 struct value *old_val;
614
615 /* Nonzero if this breakpoint tells us to print the frame. */
616 char print;
617
618 /* Nonzero if this breakpoint tells us to stop. */
619 char stop;
620
621 /* Tell bpstat_print and print_bp_stop_message how to print stuff
622 associated with this element of the bpstat chain. */
623 enum bp_print_how print_it;
624 };
625
626 enum inf_context
627 {
628 inf_starting,
629 inf_running,
630 inf_exited
631 };
632
633 /* The possible return values for breakpoint_here_p.
634 We guarantee that zero always means "no breakpoint here". */
635 enum breakpoint_here
636 {
637 no_breakpoint_here = 0,
638 ordinary_breakpoint_here,
639 permanent_breakpoint_here
640 };
641 \f
642
643 /* Prototypes for breakpoint-related functions. */
644
645 extern enum breakpoint_here breakpoint_here_p (CORE_ADDR);
646
647 extern int breakpoint_inserted_here_p (CORE_ADDR);
648
649 extern int software_breakpoint_inserted_here_p (CORE_ADDR);
650
651 extern int breakpoint_thread_match (CORE_ADDR, ptid_t);
652
653 extern void until_break_command (char *, int, int);
654
655 extern void breakpoint_re_set (void);
656
657 extern void breakpoint_re_set_thread (struct breakpoint *);
658
659 extern int ep_is_exception_catchpoint (struct breakpoint *);
660
661 extern struct breakpoint *set_momentary_breakpoint
662 (struct symtab_and_line, struct frame_id, enum bptype);
663
664 extern void set_ignore_count (int, int, int);
665
666 extern void set_default_breakpoint (int, CORE_ADDR, struct symtab *, int);
667
668 extern void mark_breakpoints_out (void);
669
670 extern void breakpoint_init_inferior (enum inf_context);
671
672 extern struct cleanup *make_cleanup_delete_breakpoint (struct breakpoint *);
673
674 extern struct cleanup *make_exec_cleanup_delete_breakpoint (struct breakpoint *);
675
676 extern void delete_breakpoint (struct breakpoint *);
677
678 extern void breakpoint_auto_delete (bpstat);
679
680 extern void breakpoint_clear_ignore_counts (void);
681
682 extern void break_command (char *, int);
683
684 extern void hbreak_command_wrapper (char *, int);
685 extern void thbreak_command_wrapper (char *, int);
686 extern void rbreak_command_wrapper (char *, int);
687 extern void watch_command_wrapper (char *, int);
688 extern void awatch_command_wrapper (char *, int);
689 extern void rwatch_command_wrapper (char *, int);
690 extern void tbreak_command (char *, int);
691
692 extern int insert_breakpoints (void);
693
694 extern int remove_breakpoints (void);
695
696 /* This function can be used to physically insert eventpoints from the
697 specified traced inferior process, without modifying the breakpoint
698 package's state. This can be useful for those targets which support
699 following the processes of a fork() or vfork() system call, when both
700 of the resulting two processes are to be followed. */
701 extern int reattach_breakpoints (int);
702
703 /* This function can be used to update the breakpoint package's state
704 after an exec() system call has been executed.
705
706 This function causes the following:
707
708 - All eventpoints are marked "not inserted".
709 - All eventpoints with a symbolic address are reset such that
710 the symbolic address must be reevaluated before the eventpoints
711 can be reinserted.
712 - The solib breakpoints are explicitly removed from the breakpoint
713 list.
714 - A step-resume breakpoint, if any, is explicitly removed from the
715 breakpoint list.
716 - All eventpoints without a symbolic address are removed from the
717 breakpoint list. */
718 extern void update_breakpoints_after_exec (void);
719
720 /* This function can be used to physically remove hardware breakpoints
721 and watchpoints from the specified traced inferior process, without
722 modifying the breakpoint package's state. This can be useful for
723 those targets which support following the processes of a fork() or
724 vfork() system call, when one of the resulting two processes is to
725 be detached and allowed to run free.
726
727 It is an error to use this function on the process whose id is
728 inferior_ptid. */
729 extern int detach_breakpoints (int);
730
731 extern void enable_longjmp_breakpoint (void);
732 extern void disable_longjmp_breakpoint (void);
733 extern void enable_overlay_breakpoints (void);
734 extern void disable_overlay_breakpoints (void);
735
736 extern void set_longjmp_resume_breakpoint (CORE_ADDR, struct frame_id);
737 /* These functions respectively disable or reenable all currently
738 enabled watchpoints. When disabled, the watchpoints are marked
739 call_disabled. When reenabled, they are marked enabled.
740
741 The intended client of these functions is call_function_by_hand.
742
743 The inferior must be stopped, and all breakpoints removed, when
744 these functions are used.
745
746 The need for these functions is that on some targets (e.g., HP-UX),
747 gdb is unable to unwind through the dummy frame that is pushed as
748 part of the implementation of a call command. Watchpoints can
749 cause the inferior to stop in places where this frame is visible,
750 and that can cause execution control to become very confused.
751
752 Note that if a user sets breakpoints in an interactively called
753 function, the call_disabled watchpoints will have been reenabled
754 when the first such breakpoint is reached. However, on targets
755 that are unable to unwind through the call dummy frame, watches
756 of stack-based storage may then be deleted, because gdb will
757 believe that their watched storage is out of scope. (Sigh.) */
758 extern void disable_watchpoints_before_interactive_call_start (void);
759
760 extern void enable_watchpoints_after_interactive_call_stop (void);
761
762
763 extern void clear_breakpoint_hit_counts (void);
764
765 extern int get_number (char **);
766
767 extern int get_number_or_range (char **);
768
769 /* The following are for displays, which aren't really breakpoints, but
770 here is as good a place as any for them. */
771
772 extern void disable_current_display (void);
773
774 extern void do_displays (void);
775
776 extern void disable_display (int);
777
778 extern void clear_displays (void);
779
780 extern void disable_breakpoint (struct breakpoint *);
781
782 extern void enable_breakpoint (struct breakpoint *);
783
784 extern void make_breakpoint_permanent (struct breakpoint *);
785
786 extern struct breakpoint *create_solib_event_breakpoint (CORE_ADDR);
787
788 extern struct breakpoint *create_thread_event_breakpoint (CORE_ADDR);
789
790 extern void remove_solib_event_breakpoints (void);
791
792 extern void remove_thread_event_breakpoints (void);
793
794 extern void disable_breakpoints_in_shlibs (int silent);
795
796 extern void re_enable_breakpoints_in_shlibs (void);
797
798 extern void create_solib_load_event_breakpoint (char *, int, char *, char *);
799
800 extern void create_solib_unload_event_breakpoint (char *, int,
801 char *, char *);
802
803 extern void create_fork_event_catchpoint (int, char *);
804
805 extern void create_vfork_event_catchpoint (int, char *);
806
807 extern void create_exec_event_catchpoint (int, char *);
808
809 /* This function returns TRUE if ep is a catchpoint. */
810 extern int ep_is_catchpoint (struct breakpoint *);
811
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 *);
816
817 extern struct breakpoint *set_breakpoint_sal (struct symtab_and_line);
818
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);
822
823 /* Pull all H/W watchpoints from the target. Return non-zero if the
824 remove fails. */
825 extern int remove_hw_watchpoints (void);
826
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);
831
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 *);
837
838 /* Indicator of whether exception catchpoints should be nuked between
839 runs of a program. */
840 extern int deprecated_exception_catchpoints_are_fragile;
841
842 /* Indicator of when exception catchpoints set-up should be
843 reinitialized -- e.g. when program is re-run. */
844 extern int deprecated_exception_support_initialized;
845
846 #endif /* !defined (BREAKPOINT_H) */