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c906108c SS |
1 | /* Data structures associated with breakpoints in GDB. |
2 | Copyright (C) 1992, 93, 94, 95, 96, 98, 1999 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #if !defined (BREAKPOINT_H) | |
21 | #define BREAKPOINT_H 1 | |
22 | ||
23 | #include "frame.h" | |
24 | #include "value.h" | |
25 | ||
26 | /* This is the maximum number of bytes a breakpoint instruction can take. | |
27 | Feel free to increase it. It's just used in a few places to size | |
28 | arrays that should be independent of the target architecture. */ | |
29 | ||
30 | #define BREAKPOINT_MAX 16 | |
31 | \f | |
32 | /* Type of breakpoint. */ | |
33 | /* FIXME In the future, we should fold all other breakpoint-like things into | |
34 | here. This includes: | |
35 | ||
36 | * single-step (for machines where we have to simulate single stepping) | |
37 | (probably, though perhaps it is better for it to look as much as | |
38 | possible like a single-step to wait_for_inferior). */ | |
39 | ||
40 | enum bptype { | |
41 | bp_none = 0, /* Eventpoint has been deleted. */ | |
42 | bp_breakpoint, /* Normal breakpoint */ | |
43 | bp_hardware_breakpoint, /* Hardware assisted breakpoint */ | |
44 | bp_until, /* used by until command */ | |
45 | bp_finish, /* used by finish command */ | |
46 | bp_watchpoint, /* Watchpoint */ | |
47 | bp_hardware_watchpoint, /* Hardware assisted watchpoint */ | |
48 | bp_read_watchpoint, /* read watchpoint, (hardware assisted) */ | |
49 | bp_access_watchpoint, /* access watchpoint, (hardware assisted) */ | |
50 | bp_longjmp, /* secret breakpoint to find longjmp() */ | |
51 | bp_longjmp_resume, /* secret breakpoint to escape longjmp() */ | |
52 | ||
53 | /* Used by wait_for_inferior for stepping over subroutine calls, for | |
54 | stepping over signal handlers, and for skipping prologues. */ | |
55 | bp_step_resume, | |
56 | ||
57 | /* Used by wait_for_inferior for stepping over signal handlers. */ | |
58 | bp_through_sigtramp, | |
59 | ||
60 | /* Used to detect when a watchpoint expression has gone out of | |
61 | scope. These breakpoints are usually not visible to the user. | |
62 | ||
63 | This breakpoint has some interesting properties: | |
64 | ||
65 | 1) There's always a 1:1 mapping between watchpoints | |
66 | on local variables and watchpoint_scope breakpoints. | |
67 | ||
68 | 2) It automatically deletes itself and the watchpoint it's | |
69 | associated with when hit. | |
70 | ||
71 | 3) It can never be disabled. */ | |
72 | bp_watchpoint_scope, | |
73 | ||
74 | /* The breakpoint at the end of a call dummy. */ | |
75 | /* FIXME: What if the function we are calling longjmp()s out of the | |
76 | call, or the user gets out with the "return" command? We currently | |
77 | have no way of cleaning up the breakpoint in these (obscure) situations. | |
78 | (Probably can solve this by noticing longjmp, "return", etc., it's | |
79 | similar to noticing when a watchpoint on a local variable goes out | |
80 | of scope (with hardware support for watchpoints)). */ | |
81 | bp_call_dummy, | |
82 | ||
83 | /* Some dynamic linkers (HP, maybe Solaris) can arrange for special | |
84 | code in the inferior to run when significant events occur in the | |
85 | dynamic linker (for example a library is loaded or unloaded). | |
86 | ||
87 | By placing a breakpoint in this magic code GDB will get control | |
88 | when these significant events occur. GDB can then re-examine | |
89 | the dynamic linker's data structures to discover any newly loaded | |
90 | dynamic libraries. */ | |
91 | bp_shlib_event, | |
92 | ||
93 | /* These breakpoints are used to implement the "catch load" command | |
94 | on platforms whose dynamic linkers support such functionality. */ | |
95 | bp_catch_load, | |
96 | ||
97 | /* These breakpoints are used to implement the "catch unload" command | |
98 | on platforms whose dynamic linkers support such functionality. */ | |
99 | bp_catch_unload, | |
100 | ||
101 | /* These are not really breakpoints, but are catchpoints that | |
102 | implement the "catch fork", "catch vfork" and "catch exec" commands | |
103 | on platforms whose kernel support such functionality. (I.e., | |
104 | kernels which can raise an event when a fork or exec occurs, as | |
105 | opposed to the debugger setting breakpoints on functions named | |
106 | "fork" or "exec".) */ | |
107 | bp_catch_fork, | |
108 | bp_catch_vfork, | |
109 | bp_catch_exec, | |
110 | ||
111 | /* These are catchpoints to implement "catch catch" and "catch throw" | |
112 | commands for C++ exception handling. */ | |
113 | bp_catch_catch, | |
114 | bp_catch_throw | |
7a292a7a | 115 | |
c906108c SS |
116 | |
117 | }; | |
118 | ||
119 | /* States of enablement of breakpoint. */ | |
120 | ||
121 | enum enable { | |
122 | disabled, /* The eventpoint is inactive, and cannot trigger. */ | |
123 | enabled, /* The eventpoint is active, and can trigger. */ | |
124 | shlib_disabled, /* The eventpoint's address is within an unloaded solib. | |
125 | The eventpoint will be automatically enabled & reset | |
126 | when that solib is loaded. */ | |
127 | call_disabled /* The eventpoint has been disabled while a call into | |
128 | the inferior is "in flight", because some eventpoints | |
129 | interfere with the implementation of a call on some | |
130 | targets. The eventpoint will be automatically enabled | |
131 | & reset when the call "lands" (either completes, or | |
132 | stops at another eventpoint). */ | |
133 | }; | |
134 | ||
135 | ||
136 | /* Disposition of breakpoint. Ie: what to do after hitting it. */ | |
137 | ||
138 | enum bpdisp { | |
139 | del, /* Delete it */ | |
140 | del_at_next_stop, /* Delete at next stop, whether hit or not */ | |
141 | disable, /* Disable it */ | |
142 | donttouch /* Leave it alone */ | |
143 | }; | |
144 | ||
145 | /* Note that the ->silent field is not currently used by any commands | |
146 | (though the code is in there if it was to be, and set_raw_breakpoint | |
147 | does set it to 0). I implemented it because I thought it would be | |
148 | useful for a hack I had to put in; I'm going to leave it in because | |
149 | I can see how there might be times when it would indeed be useful */ | |
150 | ||
151 | /* This is for a breakpoint or a watchpoint. */ | |
152 | ||
153 | struct breakpoint | |
154 | { | |
155 | struct breakpoint *next; | |
156 | /* Type of breakpoint. */ | |
157 | enum bptype type; | |
158 | /* Zero means disabled; remember the info but don't break here. */ | |
159 | enum enable enable; | |
160 | /* What to do with this breakpoint after we hit it. */ | |
161 | enum bpdisp disposition; | |
162 | /* Number assigned to distinguish breakpoints. */ | |
163 | int number; | |
164 | ||
165 | /* Address to break at, or NULL if not a breakpoint. */ | |
166 | CORE_ADDR address; | |
167 | ||
168 | /* Line number of this address. Only matters if address is | |
169 | non-NULL. */ | |
170 | ||
171 | int line_number; | |
172 | ||
173 | /* Source file name of this address. Only matters if address is | |
174 | non-NULL. */ | |
175 | ||
176 | char *source_file; | |
177 | ||
178 | /* Non-zero means a silent breakpoint (don't print frame info | |
179 | if we stop here). */ | |
180 | unsigned char silent; | |
181 | /* Number of stops at this breakpoint that should | |
182 | be continued automatically before really stopping. */ | |
183 | int ignore_count; | |
184 | /* "Real" contents of byte where breakpoint has been inserted. | |
185 | Valid only when breakpoints are in the program. Under the complete | |
186 | control of the target insert_breakpoint and remove_breakpoint routines. | |
187 | No other code should assume anything about the value(s) here. */ | |
188 | char shadow_contents[BREAKPOINT_MAX]; | |
189 | /* Nonzero if this breakpoint is now inserted. Only matters if address | |
190 | is non-NULL. */ | |
191 | char inserted; | |
192 | /* Nonzero if this is not the first breakpoint in the list | |
193 | for the given address. Only matters if address is non-NULL. */ | |
194 | char duplicate; | |
195 | /* Chain of command lines to execute when this breakpoint is hit. */ | |
196 | struct command_line *commands; | |
197 | /* Stack depth (address of frame). If nonzero, break only if fp | |
198 | equals this. */ | |
199 | CORE_ADDR frame; | |
200 | /* Conditional. Break only if this expression's value is nonzero. */ | |
201 | struct expression *cond; | |
202 | ||
203 | /* String we used to set the breakpoint (malloc'd). Only matters if | |
204 | address is non-NULL. */ | |
205 | char *addr_string; | |
206 | /* Language we used to set the breakpoint. */ | |
207 | enum language language; | |
208 | /* Input radix we used to set the breakpoint. */ | |
209 | int input_radix; | |
210 | /* String form of the breakpoint condition (malloc'd), or NULL if there | |
211 | is no condition. */ | |
212 | char *cond_string; | |
213 | /* String form of exp (malloc'd), or NULL if none. */ | |
214 | char *exp_string; | |
215 | ||
216 | /* The expression we are watching, or NULL if not a watchpoint. */ | |
217 | struct expression *exp; | |
218 | /* The largest block within which it is valid, or NULL if it is | |
219 | valid anywhere (e.g. consists just of global symbols). */ | |
220 | struct block *exp_valid_block; | |
221 | /* Value of the watchpoint the last time we checked it. */ | |
222 | value_ptr val; | |
223 | ||
224 | /* Holds the value chain for a hardware watchpoint expression. */ | |
225 | value_ptr val_chain; | |
226 | ||
227 | /* Holds the address of the related watchpoint_scope breakpoint | |
228 | when using watchpoints on local variables (might the concept | |
229 | of a related breakpoint be useful elsewhere, if not just call | |
230 | it the watchpoint_scope breakpoint or something like that. FIXME). */ | |
231 | struct breakpoint *related_breakpoint; | |
232 | ||
233 | /* Holds the frame address which identifies the frame this watchpoint | |
234 | should be evaluated in, or NULL if the watchpoint should be evaluated | |
235 | on the outermost frame. */ | |
236 | CORE_ADDR watchpoint_frame; | |
237 | ||
238 | /* Thread number for thread-specific breakpoint, or -1 if don't care */ | |
239 | int thread; | |
240 | ||
241 | /* Count of the number of times this breakpoint was taken, dumped | |
242 | with the info, but not used for anything else. Useful for | |
243 | seeing how many times you hit a break prior to the program | |
244 | aborting, so you can back up to just before the abort. */ | |
245 | int hit_count; | |
246 | ||
247 | /* Filename of a dynamically-linked library (dll), used for bp_catch_load | |
248 | and bp_catch_unload (malloc'd), or NULL if any library is significant. */ | |
249 | char * dll_pathname; | |
250 | ||
251 | /* Filename of a dll whose state change (e.g., load or unload) | |
252 | triggered this catchpoint. This field is only vaid immediately | |
253 | after this catchpoint has triggered. */ | |
254 | char * triggered_dll_pathname; | |
255 | ||
256 | /* Process id of a child process whose forking triggered this catchpoint. | |
257 | This field is only vaid immediately after this catchpoint has triggered. */ | |
258 | int forked_inferior_pid; | |
259 | ||
260 | /* Filename of a program whose exec triggered this catchpoint. This | |
261 | field is only vaid immediately after this catchpoint has triggered. */ | |
262 | char * exec_pathname; | |
263 | ||
264 | asection *section; | |
265 | }; | |
266 | \f | |
267 | /* The following stuff is an abstract data type "bpstat" ("breakpoint status"). | |
268 | This provides the ability to determine whether we have stopped at a | |
269 | breakpoint, and what we should do about it. */ | |
270 | ||
271 | typedef struct bpstats *bpstat; | |
272 | ||
273 | /* Interface: */ | |
274 | /* Clear a bpstat so that it says we are not at any breakpoint. | |
275 | Also free any storage that is part of a bpstat. */ | |
276 | extern void bpstat_clear PARAMS ((bpstat *)); | |
277 | ||
278 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that | |
279 | is part of the bpstat is copied as well. */ | |
280 | extern bpstat bpstat_copy PARAMS ((bpstat)); | |
281 | ||
282 | extern bpstat bpstat_stop_status PARAMS ((CORE_ADDR *, int)); | |
283 | \f | |
284 | /* This bpstat_what stuff tells wait_for_inferior what to do with a | |
285 | breakpoint (a challenging task). */ | |
286 | ||
287 | enum bpstat_what_main_action { | |
288 | /* Perform various other tests; that is, this bpstat does not | |
289 | say to perform any action (e.g. failed watchpoint and nothing | |
290 | else). */ | |
291 | BPSTAT_WHAT_KEEP_CHECKING, | |
292 | ||
293 | /* Rather than distinguish between noisy and silent stops here, it | |
294 | might be cleaner to have bpstat_print make that decision (also | |
295 | taking into account stop_print_frame and source_only). But the | |
296 | implications are a bit scary (interaction with auto-displays, etc.), | |
297 | so I won't try it. */ | |
298 | ||
299 | /* Stop silently. */ | |
300 | BPSTAT_WHAT_STOP_SILENT, | |
301 | ||
302 | /* Stop and print. */ | |
303 | BPSTAT_WHAT_STOP_NOISY, | |
304 | ||
305 | /* Remove breakpoints, single step once, then put them back in and | |
306 | go back to what we were doing. It's possible that this should be | |
307 | removed from the main_action and put into a separate field, to more | |
308 | cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */ | |
309 | BPSTAT_WHAT_SINGLE, | |
310 | ||
311 | /* Set longjmp_resume breakpoint, remove all other breakpoints, | |
312 | and continue. The "remove all other breakpoints" part is required | |
313 | if we are also stepping over another breakpoint as well as doing | |
314 | the longjmp handling. */ | |
315 | BPSTAT_WHAT_SET_LONGJMP_RESUME, | |
316 | ||
317 | /* Clear longjmp_resume breakpoint, then handle as | |
318 | BPSTAT_WHAT_KEEP_CHECKING. */ | |
319 | BPSTAT_WHAT_CLEAR_LONGJMP_RESUME, | |
320 | ||
321 | /* Clear longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */ | |
322 | BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE, | |
323 | ||
324 | /* Clear step resume breakpoint, and keep checking. */ | |
325 | BPSTAT_WHAT_STEP_RESUME, | |
326 | ||
327 | /* Clear through_sigtramp breakpoint, muck with trap_expected, and keep | |
328 | checking. */ | |
329 | BPSTAT_WHAT_THROUGH_SIGTRAMP, | |
330 | ||
331 | /* Check the dynamic linker's data structures for new libraries, then | |
332 | keep checking. */ | |
333 | BPSTAT_WHAT_CHECK_SHLIBS, | |
334 | ||
335 | /* Check the dynamic linker's data structures for new libraries, then | |
336 | resume out of the dynamic linker's callback, stop and print. */ | |
337 | BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK, | |
338 | ||
339 | /* This is just used to keep track of how many enums there are. */ | |
340 | BPSTAT_WHAT_LAST | |
341 | }; | |
342 | ||
343 | struct bpstat_what { | |
344 | enum bpstat_what_main_action main_action; | |
345 | ||
346 | /* Did we hit a call dummy breakpoint? This only goes with a main_action | |
347 | of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of | |
348 | continuing from a call dummy without popping the frame is not a | |
349 | useful one). */ | |
350 | int call_dummy; | |
351 | }; | |
352 | ||
353 | /* Tell what to do about this bpstat. */ | |
354 | struct bpstat_what bpstat_what PARAMS ((bpstat)); | |
355 | \f | |
356 | /* Find the bpstat associated with a breakpoint. NULL otherwise. */ | |
357 | bpstat bpstat_find_breakpoint PARAMS ((bpstat, struct breakpoint *)); | |
358 | ||
359 | /* Find a step_resume breakpoint associated with this bpstat. | |
360 | (If there are multiple step_resume bp's on the list, this function | |
361 | will arbitrarily pick one.) | |
362 | ||
363 | It is an error to use this function if BPSTAT doesn't contain a | |
364 | step_resume breakpoint. | |
365 | ||
366 | See wait_for_inferior's use of this function. | |
367 | */ | |
368 | extern struct breakpoint * | |
369 | bpstat_find_step_resume_breakpoint PARAMS ((bpstat)); | |
370 | ||
371 | /* Nonzero if a signal that we got in wait() was due to circumstances | |
372 | explained by the BS. */ | |
373 | /* Currently that is true if we have hit a breakpoint, or if there is | |
374 | a watchpoint enabled. */ | |
375 | #define bpstat_explains_signal(bs) ((bs) != NULL) | |
376 | ||
377 | /* Nonzero if we should step constantly (e.g. watchpoints on machines | |
378 | without hardware support). This isn't related to a specific bpstat, | |
379 | just to things like whether watchpoints are set. */ | |
380 | extern int bpstat_should_step PARAMS ((void)); | |
381 | ||
382 | /* Nonzero if there are enabled hardware watchpoints. */ | |
383 | extern int bpstat_have_active_hw_watchpoints PARAMS ((void)); | |
384 | ||
385 | /* Print a message indicating what happened. Returns nonzero to | |
386 | say that only the source line should be printed after this (zero | |
387 | return means print the frame as well as the source line). */ | |
388 | extern int bpstat_print PARAMS ((bpstat)); | |
389 | ||
390 | /* Return the breakpoint number of the first breakpoint we are stopped | |
391 | at. *BSP upon return is a bpstat which points to the remaining | |
392 | breakpoints stopped at (but which is not guaranteed to be good for | |
393 | anything but further calls to bpstat_num). | |
394 | Return 0 if passed a bpstat which does not indicate any breakpoints. */ | |
395 | extern int bpstat_num PARAMS ((bpstat *)); | |
396 | ||
397 | /* Perform actions associated with having stopped at *BSP. Actually, we just | |
398 | use this for breakpoint commands. Perhaps other actions will go here | |
399 | later, but this is executed at a late time (from the command loop). */ | |
400 | extern void bpstat_do_actions PARAMS ((bpstat *)); | |
401 | ||
402 | /* Modify BS so that the actions will not be performed. */ | |
403 | extern void bpstat_clear_actions PARAMS ((bpstat)); | |
404 | ||
405 | /* Given a bpstat that records zero or more triggered eventpoints, this | |
406 | function returns another bpstat which contains only the catchpoints | |
407 | on that first list, if any. | |
408 | */ | |
409 | extern void bpstat_get_triggered_catchpoints PARAMS ((bpstat, bpstat *)); | |
410 | ||
411 | /* Implementation: */ | |
412 | struct bpstats | |
413 | { | |
414 | /* Linked list because there can be two breakpoints at the | |
415 | same place, and a bpstat reflects the fact that both have been hit. */ | |
416 | bpstat next; | |
417 | /* Breakpoint that we are at. */ | |
418 | struct breakpoint *breakpoint_at; | |
419 | /* Commands left to be done. */ | |
420 | struct command_line *commands; | |
421 | /* Old value associated with a watchpoint. */ | |
422 | value_ptr old_val; | |
423 | ||
424 | /* Nonzero if this breakpoint tells us to print the frame. */ | |
425 | char print; | |
426 | ||
427 | /* Nonzero if this breakpoint tells us to stop. */ | |
428 | char stop; | |
429 | ||
430 | /* Function called by bpstat_print to print stuff associated with | |
431 | this element of the bpstat chain. Returns 0 or 1 just like | |
432 | bpstat_print, or -1 if it can't deal with it. */ | |
433 | int (*print_it) PARAMS((bpstat bs)); | |
434 | }; | |
435 | ||
436 | enum inf_context | |
437 | { | |
438 | inf_starting, | |
439 | inf_running, | |
440 | inf_exited | |
441 | }; | |
442 | ||
443 | \f | |
444 | /* Prototypes for breakpoint-related functions. */ | |
445 | ||
446 | #ifdef __STDC__ /* Forward declarations for prototypes */ | |
447 | struct frame_info; | |
448 | #endif | |
449 | ||
450 | extern int breakpoint_here_p PARAMS ((CORE_ADDR)); | |
451 | ||
452 | extern int breakpoint_inserted_here_p PARAMS ((CORE_ADDR)); | |
453 | ||
454 | extern int frame_in_dummy PARAMS ((struct frame_info *)); | |
455 | ||
456 | extern int breakpoint_thread_match PARAMS ((CORE_ADDR, int)); | |
457 | ||
458 | extern void until_break_command PARAMS ((char *, int)); | |
459 | ||
460 | extern void breakpoint_re_set PARAMS ((void)); | |
461 | ||
462 | extern void breakpoint_re_set_thread PARAMS ((struct breakpoint *)); | |
463 | ||
464 | extern int ep_is_exception_catchpoint PARAMS ((struct breakpoint *)); | |
465 | ||
466 | extern struct breakpoint *set_momentary_breakpoint | |
467 | PARAMS ((struct symtab_and_line, struct frame_info *, enum bptype)); | |
468 | ||
469 | extern void set_ignore_count PARAMS ((int, int, int)); | |
470 | ||
471 | extern void set_default_breakpoint PARAMS ((int, CORE_ADDR, struct symtab *, int)); | |
472 | ||
473 | extern void mark_breakpoints_out PARAMS ((void)); | |
474 | ||
475 | extern void breakpoint_init_inferior PARAMS ((enum inf_context)); | |
476 | ||
477 | extern void delete_breakpoint PARAMS ((struct breakpoint *)); | |
478 | ||
479 | extern void breakpoint_auto_delete PARAMS ((bpstat)); | |
480 | ||
481 | extern void breakpoint_clear_ignore_counts PARAMS ((void)); | |
482 | ||
483 | extern void break_command PARAMS ((char *, int)); | |
484 | ||
485 | extern void tbreak_command PARAMS ((char *, int)); | |
486 | ||
487 | extern int insert_breakpoints PARAMS ((void)); | |
488 | ||
489 | extern int remove_breakpoints PARAMS ((void)); | |
490 | ||
491 | /* This function can be used to physically insert eventpoints from the | |
492 | specified traced inferior process, without modifying the breakpoint | |
493 | package's state. This can be useful for those targets which support | |
494 | following the processes of a fork() or vfork() system call, when both | |
495 | of the resulting two processes are to be followed. */ | |
496 | extern int reattach_breakpoints PARAMS ((int)); | |
497 | ||
498 | /* This function can be used to update the breakpoint package's state | |
499 | after an exec() system call has been executed. | |
500 | ||
501 | This function causes the following: | |
502 | ||
503 | - All eventpoints are marked "not inserted". | |
504 | - All eventpoints with a symbolic address are reset such that | |
505 | the symbolic address must be reevaluated before the eventpoints | |
506 | can be reinserted. | |
507 | - The solib breakpoints are explicitly removed from the breakpoint | |
508 | list. | |
509 | - A step-resume breakpoint, if any, is explicitly removed from the | |
510 | breakpoint list. | |
511 | - All eventpoints without a symbolic address are removed from the | |
512 | breakpoint list. */ | |
513 | extern void update_breakpoints_after_exec PARAMS ((void)); | |
514 | ||
515 | /* This function can be used to physically remove hardware breakpoints | |
516 | and watchpoints from the specified traced inferior process, without | |
517 | modifying the breakpoint package's state. This can be useful for | |
518 | those targets which support following the processes of a fork() or | |
519 | vfork() system call, when one of the resulting two processes is to | |
520 | be detached and allowed to run free. | |
521 | ||
522 | It is an error to use this function on the process whose id is | |
523 | inferior_pid. */ | |
524 | extern int detach_breakpoints PARAMS ((int)); | |
525 | ||
526 | extern void enable_longjmp_breakpoint PARAMS ((void)); | |
527 | ||
528 | extern void disable_longjmp_breakpoint PARAMS ((void)); | |
529 | ||
530 | extern void set_longjmp_resume_breakpoint PARAMS ((CORE_ADDR, | |
531 | struct frame_info *)); | |
532 | /* These functions respectively disable or reenable all currently | |
533 | enabled watchpoints. When disabled, the watchpoints are marked | |
534 | call_disabled. When reenabled, they are marked enabled. | |
535 | ||
536 | The intended client of these functions is infcmd.c\run_stack_dummy. | |
537 | ||
538 | The inferior must be stopped, and all breakpoints removed, when | |
539 | these functions are used. | |
540 | ||
541 | The need for these functions is that on some targets (e.g., HP-UX), | |
542 | gdb is unable to unwind through the dummy frame that is pushed as | |
543 | part of the implementation of a call command. Watchpoints can | |
544 | cause the inferior to stop in places where this frame is visible, | |
545 | and that can cause execution control to become very confused. | |
546 | ||
547 | Note that if a user sets breakpoints in an interactively call | |
548 | function, the call_disabled watchpoints will have been reenabled | |
549 | when the first such breakpoint is reached. However, on targets | |
550 | that are unable to unwind through the call dummy frame, watches | |
551 | of stack-based storage may then be deleted, because gdb will | |
552 | believe that their watched storage is out of scope. (Sigh.) */ | |
553 | extern void | |
554 | disable_watchpoints_before_interactive_call_start PARAMS ((void)); | |
555 | ||
556 | extern void | |
557 | enable_watchpoints_after_interactive_call_stop PARAMS ((void)); | |
558 | ||
559 | ||
560 | extern void clear_breakpoint_hit_counts PARAMS ((void)); | |
561 | ||
562 | /* The following are for displays, which aren't really breakpoints, but | |
563 | here is as good a place as any for them. */ | |
564 | ||
565 | extern void disable_current_display PARAMS ((void)); | |
566 | ||
567 | extern void do_displays PARAMS ((void)); | |
568 | ||
569 | extern void disable_display PARAMS ((int)); | |
570 | ||
571 | extern void clear_displays PARAMS ((void)); | |
572 | ||
573 | extern void disable_breakpoint PARAMS ((struct breakpoint *)); | |
574 | ||
575 | extern void enable_breakpoint PARAMS ((struct breakpoint *)); | |
576 | ||
577 | extern void create_solib_event_breakpoint PARAMS ((CORE_ADDR)); | |
578 | ||
579 | extern void remove_solib_event_breakpoints PARAMS ((void)); | |
580 | ||
581 | extern void disable_breakpoints_in_shlibs PARAMS ((int silent)); | |
582 | ||
583 | extern void re_enable_breakpoints_in_shlibs PARAMS ((void)); | |
584 | ||
585 | extern void create_solib_load_event_breakpoint PARAMS ((char *, int, char *, char *)); | |
586 | ||
587 | extern void create_solib_unload_event_breakpoint PARAMS ((char *, int, char *, char *)); | |
588 | ||
589 | extern void create_fork_event_catchpoint PARAMS ((int, char *)); | |
590 | ||
591 | extern void create_vfork_event_catchpoint PARAMS ((int, char *)); | |
592 | ||
593 | extern void create_exec_event_catchpoint PARAMS ((int, char *)); | |
594 | ||
595 | /* This function returns TRUE if ep is a catchpoint. */ | |
596 | extern int ep_is_catchpoint PARAMS ((struct breakpoint *)); | |
597 | ||
598 | /* This function returns TRUE if ep is a catchpoint of a | |
599 | shared library (aka dynamically-linked library) event, | |
600 | such as a library load or unload. */ | |
601 | extern int ep_is_shlib_catchpoint PARAMS ((struct breakpoint *)); | |
602 | ||
603 | extern struct breakpoint *set_breakpoint_sal PARAMS ((struct symtab_and_line)); | |
604 | ||
605 | #endif /* !defined (BREAKPOINT_H) */ |