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c906108c | 1 | /* Data structures associated with breakpoints in GDB. |
197e01b6 | 2 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
7b6bb8da JB |
3 | 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011 |
4 | Free Software Foundation, Inc. | |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 11 | (at your option) any later version. |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
20 | |
21 | #if !defined (BREAKPOINT_H) | |
22 | #define BREAKPOINT_H 1 | |
23 | ||
24 | #include "frame.h" | |
25 | #include "value.h" | |
d6e956e5 | 26 | #include "vec.h" |
c906108c | 27 | |
278cd55f | 28 | struct value; |
fe898f56 | 29 | struct block; |
50389644 | 30 | struct breakpoint_object; |
197f0a60 | 31 | struct get_number_or_range_state; |
619cebe8 | 32 | struct thread_info; |
28010a5d PA |
33 | struct bpstats; |
34 | struct bp_location; | |
278cd55f | 35 | |
0e2de366 MS |
36 | /* This is the maximum number of bytes a breakpoint instruction can |
37 | take. Feel free to increase it. It's just used in a few places to | |
38 | size arrays that should be independent of the target | |
39 | architecture. */ | |
c906108c SS |
40 | |
41 | #define BREAKPOINT_MAX 16 | |
42 | \f | |
a96d9b2e SDJ |
43 | |
44 | /* Type of breakpoint. */ | |
0e2de366 MS |
45 | /* FIXME In the future, we should fold all other breakpoint-like |
46 | things into here. This includes: | |
c906108c | 47 | |
0e2de366 MS |
48 | * single-step (for machines where we have to simulate single |
49 | stepping) (probably, though perhaps it is better for it to look as | |
50 | much as possible like a single-step to wait_for_inferior). */ | |
c5aa993b JM |
51 | |
52 | enum bptype | |
53 | { | |
0e2de366 | 54 | bp_none = 0, /* Eventpoint has been deleted */ |
c5aa993b JM |
55 | bp_breakpoint, /* Normal breakpoint */ |
56 | bp_hardware_breakpoint, /* Hardware assisted breakpoint */ | |
57 | bp_until, /* used by until command */ | |
58 | bp_finish, /* used by finish command */ | |
59 | bp_watchpoint, /* Watchpoint */ | |
60 | bp_hardware_watchpoint, /* Hardware assisted watchpoint */ | |
61 | bp_read_watchpoint, /* read watchpoint, (hardware assisted) */ | |
62 | bp_access_watchpoint, /* access watchpoint, (hardware assisted) */ | |
63 | bp_longjmp, /* secret breakpoint to find longjmp() */ | |
64 | bp_longjmp_resume, /* secret breakpoint to escape longjmp() */ | |
65 | ||
186c406b TT |
66 | /* An internal breakpoint that is installed on the unwinder's |
67 | debug hook. */ | |
68 | bp_exception, | |
69 | /* An internal breakpoint that is set at the point where an | |
70 | exception will land. */ | |
71 | bp_exception_resume, | |
72 | ||
0e2de366 | 73 | /* Used by wait_for_inferior for stepping over subroutine calls, |
2c03e5be | 74 | and for skipping prologues. */ |
c5aa993b JM |
75 | bp_step_resume, |
76 | ||
2c03e5be PA |
77 | /* Used by wait_for_inferior for stepping over signal |
78 | handlers. */ | |
79 | bp_hp_step_resume, | |
80 | ||
c5aa993b JM |
81 | /* Used to detect when a watchpoint expression has gone out of |
82 | scope. These breakpoints are usually not visible to the user. | |
83 | ||
84 | This breakpoint has some interesting properties: | |
c906108c SS |
85 | |
86 | 1) There's always a 1:1 mapping between watchpoints | |
87 | on local variables and watchpoint_scope breakpoints. | |
88 | ||
89 | 2) It automatically deletes itself and the watchpoint it's | |
90 | associated with when hit. | |
91 | ||
92 | 3) It can never be disabled. */ | |
c5aa993b JM |
93 | bp_watchpoint_scope, |
94 | ||
95 | /* The breakpoint at the end of a call dummy. */ | |
0e2de366 MS |
96 | /* FIXME: What if the function we are calling longjmp()s out of |
97 | the call, or the user gets out with the "return" command? We | |
98 | currently have no way of cleaning up the breakpoint in these | |
99 | (obscure) situations. (Probably can solve this by noticing | |
100 | longjmp, "return", etc., it's similar to noticing when a | |
101 | watchpoint on a local variable goes out of scope (with hardware | |
102 | support for watchpoints)). */ | |
c5aa993b JM |
103 | bp_call_dummy, |
104 | ||
aa7d318d TT |
105 | /* A breakpoint set on std::terminate, that is used to catch |
106 | otherwise uncaught exceptions thrown during an inferior call. */ | |
107 | bp_std_terminate, | |
108 | ||
c5aa993b JM |
109 | /* Some dynamic linkers (HP, maybe Solaris) can arrange for special |
110 | code in the inferior to run when significant events occur in the | |
111 | dynamic linker (for example a library is loaded or unloaded). | |
112 | ||
113 | By placing a breakpoint in this magic code GDB will get control | |
114 | when these significant events occur. GDB can then re-examine | |
115 | the dynamic linker's data structures to discover any newly loaded | |
116 | dynamic libraries. */ | |
117 | bp_shlib_event, | |
118 | ||
c4093a6a JM |
119 | /* Some multi-threaded systems can arrange for a location in the |
120 | inferior to be executed when certain thread-related events occur | |
121 | (such as thread creation or thread death). | |
122 | ||
123 | By placing a breakpoint at one of these locations, GDB will get | |
124 | control when these events occur. GDB can then update its thread | |
125 | lists etc. */ | |
126 | ||
127 | bp_thread_event, | |
128 | ||
1900040c MS |
129 | /* On the same principal, an overlay manager can arrange to call a |
130 | magic location in the inferior whenever there is an interesting | |
131 | change in overlay status. GDB can update its overlay tables | |
132 | and fiddle with breakpoints in overlays when this breakpoint | |
133 | is hit. */ | |
134 | ||
135 | bp_overlay_event, | |
136 | ||
0fd8e87f UW |
137 | /* Master copies of longjmp breakpoints. These are always installed |
138 | as soon as an objfile containing longjmp is loaded, but they are | |
139 | always disabled. While necessary, temporary clones of bp_longjmp | |
140 | type will be created and enabled. */ | |
141 | ||
142 | bp_longjmp_master, | |
143 | ||
aa7d318d TT |
144 | /* Master copies of std::terminate breakpoints. */ |
145 | bp_std_terminate_master, | |
146 | ||
186c406b TT |
147 | /* Like bp_longjmp_master, but for exceptions. */ |
148 | bp_exception_master, | |
149 | ||
ce78b96d | 150 | bp_catchpoint, |
1042e4c0 SS |
151 | |
152 | bp_tracepoint, | |
7a697b8d | 153 | bp_fast_tracepoint, |
0fb4aa4b | 154 | bp_static_tracepoint, |
4efc6507 DE |
155 | |
156 | /* Event for JIT compiled code generation or deletion. */ | |
157 | bp_jit_event, | |
0e30163f JK |
158 | |
159 | /* Breakpoint is placed at the STT_GNU_IFUNC resolver. When hit GDB | |
160 | inserts new bp_gnu_ifunc_resolver_return at the caller. | |
161 | bp_gnu_ifunc_resolver is still being kept here as a different thread | |
162 | may still hit it before bp_gnu_ifunc_resolver_return is hit by the | |
163 | original thread. */ | |
164 | bp_gnu_ifunc_resolver, | |
165 | ||
166 | /* On its hit GDB now know the resolved address of the target | |
167 | STT_GNU_IFUNC function. Associated bp_gnu_ifunc_resolver can be | |
168 | deleted now and the breakpoint moved to the target function entry | |
169 | point. */ | |
170 | bp_gnu_ifunc_resolver_return, | |
c5aa993b | 171 | }; |
c906108c | 172 | |
0e2de366 | 173 | /* States of enablement of breakpoint. */ |
c906108c | 174 | |
b5de0fa7 | 175 | enum enable_state |
c5aa993b | 176 | { |
0e2de366 MS |
177 | bp_disabled, /* The eventpoint is inactive, and cannot |
178 | trigger. */ | |
179 | bp_enabled, /* The eventpoint is active, and can | |
180 | trigger. */ | |
181 | bp_call_disabled, /* The eventpoint has been disabled while a | |
182 | call into the inferior is "in flight", | |
183 | because some eventpoints interfere with | |
184 | the implementation of a call on some | |
185 | targets. The eventpoint will be | |
186 | automatically enabled and reset when the | |
187 | call "lands" (either completes, or stops | |
188 | at another eventpoint). */ | |
189 | bp_startup_disabled, /* The eventpoint has been disabled during | |
190 | inferior startup. This is necessary on | |
191 | some targets where the main executable | |
192 | will get relocated during startup, making | |
193 | breakpoint addresses invalid. The | |
194 | eventpoint will be automatically enabled | |
195 | and reset once inferior startup is | |
196 | complete. */ | |
197 | bp_permanent /* There is a breakpoint instruction | |
198 | hard-wired into the target's code. Don't | |
199 | try to write another breakpoint | |
200 | instruction on top of it, or restore its | |
201 | value. Step over it using the | |
202 | architecture's SKIP_INSN macro. */ | |
c5aa993b | 203 | }; |
c906108c SS |
204 | |
205 | ||
0e2de366 | 206 | /* Disposition of breakpoint. Ie: what to do after hitting it. */ |
c906108c | 207 | |
c5aa993b JM |
208 | enum bpdisp |
209 | { | |
b5de0fa7 | 210 | disp_del, /* Delete it */ |
0e2de366 MS |
211 | disp_del_at_next_stop, /* Delete at next stop, |
212 | whether hit or not */ | |
b5de0fa7 EZ |
213 | disp_disable, /* Disable it */ |
214 | disp_donttouch /* Leave it alone */ | |
c5aa993b | 215 | }; |
c906108c | 216 | |
53a5351d JM |
217 | enum target_hw_bp_type |
218 | { | |
219 | hw_write = 0, /* Common HW watchpoint */ | |
220 | hw_read = 1, /* Read HW watchpoint */ | |
221 | hw_access = 2, /* Access HW watchpoint */ | |
222 | hw_execute = 3 /* Execute HW breakpoint */ | |
223 | }; | |
224 | ||
8181d85f DJ |
225 | |
226 | /* Information used by targets to insert and remove breakpoints. */ | |
227 | ||
228 | struct bp_target_info | |
229 | { | |
6c95b8df PA |
230 | /* Address space at which the breakpoint was placed. */ |
231 | struct address_space *placed_address_space; | |
232 | ||
8181d85f DJ |
233 | /* Address at which the breakpoint was placed. This is normally the |
234 | same as ADDRESS from the bp_location, except when adjustment | |
3b3b875c | 235 | happens in gdbarch_breakpoint_from_pc. The most common form of |
8181d85f DJ |
236 | adjustment is stripping an alternate ISA marker from the PC which |
237 | is used to determine the type of breakpoint to insert. */ | |
238 | CORE_ADDR placed_address; | |
239 | ||
f1310107 TJB |
240 | /* If this is a ranged breakpoint, then this field contains the |
241 | length of the range that will be watched for execution. */ | |
242 | int length; | |
243 | ||
8181d85f DJ |
244 | /* If the breakpoint lives in memory and reading that memory would |
245 | give back the breakpoint, instead of the original contents, then | |
246 | the original contents are cached here. Only SHADOW_LEN bytes of | |
247 | this buffer are valid, and only when the breakpoint is inserted. */ | |
248 | gdb_byte shadow_contents[BREAKPOINT_MAX]; | |
249 | ||
250 | /* The length of the data cached in SHADOW_CONTENTS. */ | |
251 | int shadow_len; | |
252 | ||
253 | /* The size of the placed breakpoint, according to | |
0e2de366 MS |
254 | gdbarch_breakpoint_from_pc, when the breakpoint was inserted. |
255 | This is generally the same as SHADOW_LEN, unless we did not need | |
8181d85f | 256 | to read from the target to implement the memory breakpoint |
0e2de366 MS |
257 | (e.g. if a remote stub handled the details). We may still need |
258 | the size to remove the breakpoint safely. */ | |
8181d85f DJ |
259 | int placed_size; |
260 | }; | |
261 | ||
5cab636d DJ |
262 | /* GDB maintains two types of information about each breakpoint (or |
263 | watchpoint, or other related event). The first type corresponds | |
264 | to struct breakpoint; this is a relatively high-level structure | |
265 | which contains the source location(s), stopping conditions, user | |
266 | commands to execute when the breakpoint is hit, and so forth. | |
267 | ||
268 | The second type of information corresponds to struct bp_location. | |
269 | Each breakpoint has one or (eventually) more locations associated | |
270 | with it, which represent target-specific and machine-specific | |
271 | mechanisms for stopping the program. For instance, a watchpoint | |
272 | expression may require multiple hardware watchpoints in order to | |
273 | catch all changes in the value of the expression being watched. */ | |
274 | ||
275 | enum bp_loc_type | |
276 | { | |
277 | bp_loc_software_breakpoint, | |
278 | bp_loc_hardware_breakpoint, | |
279 | bp_loc_hardware_watchpoint, | |
280 | bp_loc_other /* Miscellaneous... */ | |
281 | }; | |
282 | ||
28010a5d PA |
283 | /* This structure is a collection of function pointers that, if |
284 | available, will be called instead of performing the default action | |
285 | for this bp_loc_type. */ | |
286 | ||
287 | struct bp_location_ops | |
288 | { | |
289 | /* Destructor. Releases everything from SELF (but not SELF | |
290 | itself). */ | |
291 | void (*dtor) (struct bp_location *self); | |
292 | }; | |
293 | ||
5cab636d DJ |
294 | struct bp_location |
295 | { | |
0d381245 VP |
296 | /* Chain pointer to the next breakpoint location for |
297 | the same parent breakpoint. */ | |
7cc221ef DJ |
298 | struct bp_location *next; |
299 | ||
28010a5d PA |
300 | /* Methods associated with this location. */ |
301 | const struct bp_location_ops *ops; | |
302 | ||
f431efe5 PA |
303 | /* The reference count. */ |
304 | int refc; | |
305 | ||
5cab636d DJ |
306 | /* Type of this breakpoint location. */ |
307 | enum bp_loc_type loc_type; | |
308 | ||
309 | /* Each breakpoint location must belong to exactly one higher-level | |
f431efe5 PA |
310 | breakpoint. This pointer is NULL iff this bp_location is no |
311 | longer attached to a breakpoint. For example, when a breakpoint | |
312 | is deleted, its locations may still be found in the | |
313 | moribund_locations list, or if we had stopped for it, in | |
314 | bpstats. */ | |
5cab636d DJ |
315 | struct breakpoint *owner; |
316 | ||
60e1c644 PA |
317 | /* Conditional. Break only if this expression's value is nonzero. |
318 | Unlike string form of condition, which is associated with | |
319 | breakpoint, this is associated with location, since if breakpoint | |
320 | has several locations, the evaluation of expression can be | |
321 | different for different locations. Only valid for real | |
322 | breakpoints; a watchpoint's conditional expression is stored in | |
323 | the owner breakpoint object. */ | |
511a6cd4 | 324 | struct expression *cond; |
0d381245 VP |
325 | |
326 | /* This location's address is in an unloaded solib, and so this | |
327 | location should not be inserted. It will be automatically | |
328 | enabled when that solib is loaded. */ | |
329 | char shlib_disabled; | |
330 | ||
331 | /* Is this particular location enabled. */ | |
332 | char enabled; | |
511a6cd4 | 333 | |
5cab636d DJ |
334 | /* Nonzero if this breakpoint is now inserted. */ |
335 | char inserted; | |
336 | ||
337 | /* Nonzero if this is not the first breakpoint in the list | |
1e4d1764 YQ |
338 | for the given address. location of tracepoint can _never_ |
339 | be duplicated with other locations of tracepoints and other | |
340 | kinds of breakpoints, because two locations at the same | |
341 | address may have different actions, so both of these locations | |
342 | should be downloaded and so that `tfind N' always works. */ | |
5cab636d DJ |
343 | char duplicate; |
344 | ||
345 | /* If we someday support real thread-specific breakpoints, then | |
346 | the breakpoint location will need a thread identifier. */ | |
347 | ||
348 | /* Data for specific breakpoint types. These could be a union, but | |
349 | simplicity is more important than memory usage for breakpoints. */ | |
350 | ||
a6d9a66e UW |
351 | /* Architecture associated with this location's address. May be |
352 | different from the breakpoint architecture. */ | |
353 | struct gdbarch *gdbarch; | |
354 | ||
6c95b8df PA |
355 | /* The program space associated with this breakpoint location |
356 | address. Note that an address space may be represented in more | |
357 | than one program space (e.g. each uClinux program will be given | |
358 | its own program space, but there will only be one address space | |
359 | for all of them), but we must not insert more than one location | |
360 | at the same address in the same address space. */ | |
361 | struct program_space *pspace; | |
362 | ||
5cab636d DJ |
363 | /* Note that zero is a perfectly valid code address on some platforms |
364 | (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL | |
365 | is not a special value for this field. Valid for all types except | |
366 | bp_loc_other. */ | |
367 | CORE_ADDR address; | |
368 | ||
a3be7890 | 369 | /* For hardware watchpoints, the size of the memory region being |
f1310107 TJB |
370 | watched. For hardware ranged breakpoints, the size of the |
371 | breakpoint range. */ | |
a5606eee VP |
372 | int length; |
373 | ||
0e2de366 | 374 | /* Type of hardware watchpoint. */ |
a5606eee VP |
375 | enum target_hw_bp_type watchpoint_type; |
376 | ||
714835d5 | 377 | /* For any breakpoint type with an address, this is the section |
0e2de366 MS |
378 | associated with the address. Used primarily for overlay |
379 | debugging. */ | |
714835d5 | 380 | struct obj_section *section; |
cf3a9e5b | 381 | |
5cab636d DJ |
382 | /* Address at which breakpoint was requested, either by the user or |
383 | by GDB for internal breakpoints. This will usually be the same | |
384 | as ``address'' (above) except for cases in which | |
385 | ADJUST_BREAKPOINT_ADDRESS has computed a different address at | |
386 | which to place the breakpoint in order to comply with a | |
387 | processor's architectual constraints. */ | |
388 | CORE_ADDR requested_address; | |
8181d85f | 389 | |
0d381245 VP |
390 | char *function_name; |
391 | ||
8181d85f DJ |
392 | /* Details of the placed breakpoint, when inserted. */ |
393 | struct bp_target_info target_info; | |
394 | ||
395 | /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */ | |
396 | struct bp_target_info overlay_target_info; | |
20874c92 VP |
397 | |
398 | /* In a non-stop mode, it's possible that we delete a breakpoint, | |
399 | but as we do that, some still running thread hits that breakpoint. | |
400 | For that reason, we need to keep locations belonging to deleted | |
401 | breakpoints for a bit, so that don't report unexpected SIGTRAP. | |
402 | We can't keep such locations forever, so we use a heuristic -- | |
403 | after we process certain number of inferior events since | |
404 | breakpoint was deleted, we retire all locations of that breakpoint. | |
405 | This variable keeps a number of events still to go, when | |
406 | it becomes 0 this location is retired. */ | |
407 | int events_till_retirement; | |
5cab636d DJ |
408 | }; |
409 | ||
3086aeae DJ |
410 | /* This structure is a collection of function pointers that, if available, |
411 | will be called instead of the performing the default action for this | |
412 | bptype. */ | |
413 | ||
77b06cd7 | 414 | struct breakpoint_ops |
3086aeae | 415 | { |
be5c67c1 PA |
416 | /* Destructor. Releases everything from SELF (but not SELF |
417 | itself). */ | |
418 | void (*dtor) (struct breakpoint *self); | |
419 | ||
28010a5d PA |
420 | /* Allocate a location for this breakpoint. */ |
421 | struct bp_location * (*allocate_location) (struct breakpoint *); | |
422 | ||
423 | /* Reevaluate a breakpoint. This is necessary after symbols change | |
424 | (e.g., an executable or DSO was loaded, or the inferior just | |
425 | started). */ | |
426 | void (*re_set) (struct breakpoint *self); | |
427 | ||
77b06cd7 | 428 | /* Insert the breakpoint or watchpoint or activate the catchpoint. |
348d480f PA |
429 | Return 0 for success, 1 if the breakpoint, watchpoint or |
430 | catchpoint type is not supported, -1 for failure. */ | |
77b06cd7 | 431 | int (*insert_location) (struct bp_location *); |
ce78b96d JB |
432 | |
433 | /* Remove the breakpoint/catchpoint that was previously inserted | |
77b06cd7 TJB |
434 | with the "insert" method above. Return 0 for success, 1 if the |
435 | breakpoint, watchpoint or catchpoint type is not supported, | |
436 | -1 for failure. */ | |
437 | int (*remove_location) (struct bp_location *); | |
ce78b96d | 438 | |
28010a5d PA |
439 | /* Return true if it the target has stopped due to hitting |
440 | breakpoint location BL. This function does not check if we | |
441 | should stop, only if BL explains the stop. */ | |
442 | int (*breakpoint_hit) (const struct bp_location *bl, struct address_space *, | |
f1310107 | 443 | CORE_ADDR); |
ce78b96d | 444 | |
28010a5d PA |
445 | /* Check internal conditions of the breakpoint referred to by BS. |
446 | If we should not stop for this breakpoint, set BS->stop to 0. */ | |
447 | void (*check_status) (struct bpstats *bs); | |
448 | ||
e09342b5 TJB |
449 | /* Tell how many hardware resources (debug registers) are needed |
450 | for this breakpoint. If this function is not provided, then | |
451 | the breakpoint or watchpoint needs one debug register. */ | |
452 | int (*resources_needed) (const struct bp_location *); | |
453 | ||
9c06b0b4 TJB |
454 | /* Tell whether we can downgrade from a hardware watchpoint to a software |
455 | one. If not, the user will not be able to enable the watchpoint when | |
456 | there are not enough hardware resources available. */ | |
457 | int (*works_in_software_mode) (const struct breakpoint *); | |
458 | ||
3086aeae DJ |
459 | /* The normal print routine for this breakpoint, called when we |
460 | hit it. */ | |
348d480f | 461 | enum print_stop_action (*print_it) (struct bpstats *bs); |
3086aeae | 462 | |
0e2de366 MS |
463 | /* Display information about this breakpoint, for "info |
464 | breakpoints". */ | |
a6d9a66e | 465 | void (*print_one) (struct breakpoint *, struct bp_location **); |
3086aeae | 466 | |
f1310107 TJB |
467 | /* Display extra information about this breakpoint, below the normal |
468 | breakpoint description in "info breakpoints". | |
469 | ||
470 | In the example below, the "address range" line was printed | |
471 | by print_one_detail_ranged_breakpoint. | |
472 | ||
473 | (gdb) info breakpoints | |
474 | Num Type Disp Enb Address What | |
475 | 2 hw breakpoint keep y in main at test-watch.c:70 | |
476 | address range: [0x10000458, 0x100004c7] | |
477 | ||
478 | */ | |
479 | void (*print_one_detail) (const struct breakpoint *, struct ui_out *); | |
480 | ||
0e2de366 MS |
481 | /* Display information about this breakpoint after setting it |
482 | (roughly speaking; this is called from "mention"). */ | |
3086aeae | 483 | void (*print_mention) (struct breakpoint *); |
6149aea9 PA |
484 | |
485 | /* Print to FP the CLI command that recreates this breakpoint. */ | |
486 | void (*print_recreate) (struct breakpoint *, struct ui_file *fp); | |
3086aeae DJ |
487 | }; |
488 | ||
d9b3f62e PA |
489 | /* Helper for breakpoint_ops->print_recreate implementations. Prints |
490 | the "thread" or "task" condition of B, and then a newline. | |
491 | ||
492 | Necessary because most breakpoint implementations accept | |
493 | thread/task conditions at the end of the spec line, like "break foo | |
494 | thread 1", which needs outputting before any breakpoint-type | |
495 | specific extra command necessary for B's recreation. */ | |
496 | extern void print_recreate_thread (struct breakpoint *b, struct ui_file *fp); | |
497 | ||
d983da9c DJ |
498 | enum watchpoint_triggered |
499 | { | |
500 | /* This watchpoint definitely did not trigger. */ | |
501 | watch_triggered_no = 0, | |
502 | ||
503 | /* Some hardware watchpoint triggered, and it might have been this | |
504 | one, but we do not know which it was. */ | |
505 | watch_triggered_unknown, | |
506 | ||
507 | /* This hardware watchpoint definitely did trigger. */ | |
508 | watch_triggered_yes | |
509 | }; | |
510 | ||
a96d9b2e SDJ |
511 | /* This is used to declare the VEC syscalls_to_be_caught. */ |
512 | DEF_VEC_I(int); | |
513 | ||
74960c60 VP |
514 | typedef struct bp_location *bp_location_p; |
515 | DEF_VEC_P(bp_location_p); | |
516 | ||
9add0f1b | 517 | /* A reference-counted struct command_line. This lets multiple |
5cea2a26 PA |
518 | breakpoints share a single command list. This is an implementation |
519 | detail to the breakpoints module. */ | |
520 | struct counted_command_line; | |
9add0f1b | 521 | |
e09342b5 TJB |
522 | /* Some targets (e.g., embedded PowerPC) need two debug registers to set |
523 | a watchpoint over a memory region. If this flag is true, GDB will use | |
524 | only one register per watchpoint, thus assuming that all acesses that | |
525 | modify a memory location happen at its starting address. */ | |
526 | ||
527 | extern int target_exact_watchpoints; | |
528 | ||
c906108c SS |
529 | /* Note that the ->silent field is not currently used by any commands |
530 | (though the code is in there if it was to be, and set_raw_breakpoint | |
531 | does set it to 0). I implemented it because I thought it would be | |
532 | useful for a hack I had to put in; I'm going to leave it in because | |
533 | I can see how there might be times when it would indeed be useful */ | |
534 | ||
3a5c3e22 | 535 | /* This is for all kinds of breakpoints. */ |
c906108c SS |
536 | |
537 | struct breakpoint | |
c5aa993b | 538 | { |
3a5c3e22 | 539 | /* Methods associated with this breakpoint. */ |
c0a91b2b | 540 | const struct breakpoint_ops *ops; |
3a5c3e22 | 541 | |
c5aa993b | 542 | struct breakpoint *next; |
0e2de366 | 543 | /* Type of breakpoint. */ |
c5aa993b JM |
544 | enum bptype type; |
545 | /* Zero means disabled; remember the info but don't break here. */ | |
b5de0fa7 | 546 | enum enable_state enable_state; |
0e2de366 | 547 | /* What to do with this breakpoint after we hit it. */ |
c5aa993b JM |
548 | enum bpdisp disposition; |
549 | /* Number assigned to distinguish breakpoints. */ | |
550 | int number; | |
551 | ||
5cab636d DJ |
552 | /* Location(s) associated with this high-level breakpoint. */ |
553 | struct bp_location *loc; | |
76897487 | 554 | |
644a1fe1 | 555 | /* Line number of this address. */ |
c5aa993b JM |
556 | |
557 | int line_number; | |
558 | ||
644a1fe1 | 559 | /* Source file name of this address. */ |
c5aa993b JM |
560 | |
561 | char *source_file; | |
562 | ||
563 | /* Non-zero means a silent breakpoint (don't print frame info | |
0e2de366 | 564 | if we stop here). */ |
c5aa993b | 565 | unsigned char silent; |
56435ebe TT |
566 | /* Non-zero means display ADDR_STRING to the user verbatim. */ |
567 | unsigned char display_canonical; | |
c5aa993b JM |
568 | /* Number of stops at this breakpoint that should |
569 | be continued automatically before really stopping. */ | |
570 | int ignore_count; | |
0e2de366 MS |
571 | /* Chain of command lines to execute when this breakpoint is |
572 | hit. */ | |
9add0f1b | 573 | struct counted_command_line *commands; |
c5aa993b JM |
574 | /* Stack depth (address of frame). If nonzero, break only if fp |
575 | equals this. */ | |
818dd999 | 576 | struct frame_id frame_id; |
c5aa993b | 577 | |
6c95b8df PA |
578 | /* The program space used to set the breakpoint. */ |
579 | struct program_space *pspace; | |
580 | ||
644a1fe1 | 581 | /* String we used to set the breakpoint (malloc'd). */ |
c5aa993b | 582 | char *addr_string; |
f1310107 TJB |
583 | |
584 | /* For a ranged breakpoint, the string we used to find | |
585 | the end of the range (malloc'd). */ | |
586 | char *addr_string_range_end; | |
587 | ||
a6d9a66e UW |
588 | /* Architecture we used to set the breakpoint. */ |
589 | struct gdbarch *gdbarch; | |
c5aa993b JM |
590 | /* Language we used to set the breakpoint. */ |
591 | enum language language; | |
592 | /* Input radix we used to set the breakpoint. */ | |
593 | int input_radix; | |
0e2de366 MS |
594 | /* String form of the breakpoint condition (malloc'd), or NULL if |
595 | there is no condition. */ | |
c5aa993b | 596 | char *cond_string; |
0e2de366 MS |
597 | /* String form of exp to use for displaying to the user |
598 | (malloc'd), or NULL if none. */ | |
c5aa993b | 599 | |
c5aa993b | 600 | /* Holds the address of the related watchpoint_scope breakpoint |
0e2de366 MS |
601 | when using watchpoints on local variables (might the concept of |
602 | a related breakpoint be useful elsewhere, if not just call it | |
603 | the watchpoint_scope breakpoint or something like that. | |
604 | FIXME). */ | |
c5aa993b JM |
605 | struct breakpoint *related_breakpoint; |
606 | ||
0e2de366 MS |
607 | /* Thread number for thread-specific breakpoint, |
608 | or -1 if don't care. */ | |
c5aa993b JM |
609 | int thread; |
610 | ||
0e2de366 MS |
611 | /* Ada task number for task-specific breakpoint, |
612 | or 0 if don't care. */ | |
4a306c9a JB |
613 | int task; |
614 | ||
c5aa993b JM |
615 | /* Count of the number of times this breakpoint was taken, dumped |
616 | with the info, but not used for anything else. Useful for | |
617 | seeing how many times you hit a break prior to the program | |
618 | aborting, so you can back up to just before the abort. */ | |
619 | int hit_count; | |
620 | ||
0d381245 VP |
621 | /* Is breakpoint's condition not yet parsed because we found |
622 | no location initially so had no context to parse | |
623 | the condition in. */ | |
624 | int condition_not_parsed; | |
1042e4c0 | 625 | |
84f4c1fe PM |
626 | /* With a Python scripting enabled GDB, store a reference to the |
627 | Python object that has been associated with this breakpoint. | |
628 | This is always NULL for a GDB that is not script enabled. It | |
629 | can sometimes be NULL for enabled GDBs as not all breakpoint | |
630 | types are tracked by the Python scripting API. */ | |
50389644 | 631 | struct breakpoint_object *py_bp_object; |
3a5c3e22 | 632 | }; |
e09342b5 | 633 | |
3a5c3e22 PA |
634 | /* An instance of this type is used to represent a watchpoint. It |
635 | includes a "struct breakpoint" as a kind of base class; users | |
636 | downcast to "struct breakpoint *" when needed. */ | |
9c06b0b4 | 637 | |
3a5c3e22 PA |
638 | struct watchpoint |
639 | { | |
640 | /* The base class. */ | |
641 | struct breakpoint base; | |
642 | ||
643 | /* String form of exp to use for displaying to the user (malloc'd), | |
644 | or NULL if none. */ | |
645 | char *exp_string; | |
646 | /* String form to use for reparsing of EXP (malloc'd) or NULL. */ | |
647 | char *exp_string_reparse; | |
648 | ||
649 | /* The expression we are watching, or NULL if not a watchpoint. */ | |
650 | struct expression *exp; | |
651 | /* The largest block within which it is valid, or NULL if it is | |
652 | valid anywhere (e.g. consists just of global symbols). */ | |
653 | struct block *exp_valid_block; | |
654 | /* The conditional expression if any. */ | |
655 | struct expression *cond_exp; | |
656 | /* The largest block within which it is valid, or NULL if it is | |
657 | valid anywhere (e.g. consists just of global symbols). */ | |
658 | struct block *cond_exp_valid_block; | |
659 | /* Value of the watchpoint the last time we checked it, or NULL when | |
660 | we do not know the value yet or the value was not readable. VAL | |
661 | is never lazy. */ | |
662 | struct value *val; | |
663 | /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL, | |
664 | then an error occurred reading the value. */ | |
665 | int val_valid; | |
666 | ||
667 | /* Holds the frame address which identifies the frame this | |
668 | watchpoint should be evaluated in, or `null' if the watchpoint | |
669 | should be evaluated on the outermost frame. */ | |
670 | struct frame_id watchpoint_frame; | |
671 | ||
672 | /* Holds the thread which identifies the frame this watchpoint | |
673 | should be considered in scope for, or `null_ptid' if the | |
674 | watchpoint should be evaluated in all threads. */ | |
675 | ptid_t watchpoint_thread; | |
676 | ||
677 | /* For hardware watchpoints, the triggered status according to the | |
678 | hardware. */ | |
679 | enum watchpoint_triggered watchpoint_triggered; | |
680 | ||
681 | /* Whether this watchpoint is exact (see | |
682 | target_exact_watchpoints). */ | |
683 | int exact; | |
684 | ||
685 | /* The mask address for a masked hardware watchpoint. */ | |
686 | CORE_ADDR hw_wp_mask; | |
687 | }; | |
688 | ||
689 | /* Returns true if BPT is really a watchpoint. */ | |
690 | ||
691 | extern int is_watchpoint (const struct breakpoint *bpt); | |
d6e956e5 | 692 | |
d9b3f62e PA |
693 | /* An instance of this type is used to represent all kinds of |
694 | tracepoints. It includes a "struct breakpoint" as a kind of base | |
695 | class; users downcast to "struct breakpoint *" when needed. */ | |
696 | ||
697 | struct tracepoint | |
698 | { | |
699 | /* The base class. */ | |
700 | struct breakpoint base; | |
701 | ||
702 | /* Number of times this tracepoint should single-step and collect | |
703 | additional data. */ | |
704 | long step_count; | |
705 | ||
706 | /* Number of times this tracepoint should be hit before | |
707 | disabling/ending. */ | |
708 | int pass_count; | |
709 | ||
710 | /* The number of the tracepoint on the target. */ | |
711 | int number_on_target; | |
712 | ||
713 | /* The static tracepoint marker id, if known. */ | |
714 | char *static_trace_marker_id; | |
715 | ||
716 | /* LTTng/UST allow more than one marker with the same ID string, | |
717 | although it unadvised because it confuses tools. When setting | |
718 | static tracepoints by marker ID, this will record the index in | |
719 | the array of markers we found for the given marker ID for which | |
720 | this static tracepoint corresponds. When resetting breakpoints, | |
721 | we will use this index to try to find the same marker again. */ | |
722 | int static_trace_marker_id_idx; | |
723 | }; | |
724 | ||
d6e956e5 VP |
725 | typedef struct breakpoint *breakpoint_p; |
726 | DEF_VEC_P(breakpoint_p); | |
c906108c | 727 | \f |
53a5351d JM |
728 | /* The following stuff is an abstract data type "bpstat" ("breakpoint |
729 | status"). This provides the ability to determine whether we have | |
730 | stopped at a breakpoint, and what we should do about it. */ | |
c906108c SS |
731 | |
732 | typedef struct bpstats *bpstat; | |
733 | ||
198757a8 VP |
734 | /* Clears a chain of bpstat, freeing storage |
735 | of each. */ | |
a14ed312 | 736 | extern void bpstat_clear (bpstat *); |
c906108c SS |
737 | |
738 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that | |
739 | is part of the bpstat is copied as well. */ | |
a14ed312 | 740 | extern bpstat bpstat_copy (bpstat); |
c906108c | 741 | |
6c95b8df PA |
742 | extern bpstat bpstat_stop_status (struct address_space *aspace, |
743 | CORE_ADDR pc, ptid_t ptid); | |
c906108c SS |
744 | \f |
745 | /* This bpstat_what stuff tells wait_for_inferior what to do with a | |
628fe4e4 JK |
746 | breakpoint (a challenging task). |
747 | ||
748 | The enum values order defines priority-like order of the actions. | |
749 | Once you've decided that some action is appropriate, you'll never | |
750 | go back and decide something of a lower priority is better. Each | |
751 | of these actions is mutually exclusive with the others. That | |
752 | means, that if you find yourself adding a new action class here and | |
753 | wanting to tell GDB that you have two simultaneous actions to | |
754 | handle, something is wrong, and you probably don't actually need a | |
755 | new action type. | |
756 | ||
757 | Note that a step resume breakpoint overrides another breakpoint of | |
758 | signal handling (see comment in wait_for_inferior at where we set | |
759 | the step_resume breakpoint). */ | |
c906108c | 760 | |
c5aa993b JM |
761 | enum bpstat_what_main_action |
762 | { | |
763 | /* Perform various other tests; that is, this bpstat does not | |
764 | say to perform any action (e.g. failed watchpoint and nothing | |
765 | else). */ | |
766 | BPSTAT_WHAT_KEEP_CHECKING, | |
767 | ||
c5aa993b | 768 | /* Remove breakpoints, single step once, then put them back in and |
0e2de366 MS |
769 | go back to what we were doing. It's possible that this should |
770 | be removed from the main_action and put into a separate field, | |
771 | to more cleanly handle | |
772 | BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */ | |
c5aa993b JM |
773 | BPSTAT_WHAT_SINGLE, |
774 | ||
775 | /* Set longjmp_resume breakpoint, remove all other breakpoints, | |
0e2de366 MS |
776 | and continue. The "remove all other breakpoints" part is |
777 | required if we are also stepping over another breakpoint as | |
778 | well as doing the longjmp handling. */ | |
c5aa993b JM |
779 | BPSTAT_WHAT_SET_LONGJMP_RESUME, |
780 | ||
781 | /* Clear longjmp_resume breakpoint, then handle as | |
782 | BPSTAT_WHAT_KEEP_CHECKING. */ | |
783 | BPSTAT_WHAT_CLEAR_LONGJMP_RESUME, | |
784 | ||
2c03e5be PA |
785 | /* Clear step resume breakpoint, and keep checking. */ |
786 | BPSTAT_WHAT_STEP_RESUME, | |
787 | ||
628fe4e4 JK |
788 | /* Rather than distinguish between noisy and silent stops here, it |
789 | might be cleaner to have bpstat_print make that decision (also | |
790 | taking into account stop_print_frame and source_only). But the | |
0e2de366 MS |
791 | implications are a bit scary (interaction with auto-displays, |
792 | etc.), so I won't try it. */ | |
c5aa993b | 793 | |
628fe4e4 JK |
794 | /* Stop silently. */ |
795 | BPSTAT_WHAT_STOP_SILENT, | |
c5aa993b | 796 | |
628fe4e4 JK |
797 | /* Stop and print. */ |
798 | BPSTAT_WHAT_STOP_NOISY, | |
4efc6507 | 799 | |
2c03e5be PA |
800 | /* Clear step resume breakpoint, and keep checking. High-priority |
801 | step-resume breakpoints are used when even if there's a user | |
802 | breakpoint at the current PC when we set the step-resume | |
803 | breakpoint, we don't want to re-handle any breakpoint other | |
804 | than the step-resume when it's hit; instead we want to move | |
805 | past the breakpoint. This is used in the case of skipping | |
806 | signal handlers. */ | |
807 | BPSTAT_WHAT_HP_STEP_RESUME, | |
c5aa993b JM |
808 | }; |
809 | ||
aa7d318d TT |
810 | /* An enum indicating the kind of "stack dummy" stop. This is a bit |
811 | of a misnomer because only one kind of truly a stack dummy. */ | |
812 | enum stop_stack_kind | |
813 | { | |
814 | /* We didn't stop at a stack dummy breakpoint. */ | |
815 | STOP_NONE = 0, | |
816 | ||
817 | /* Stopped at a stack dummy. */ | |
818 | STOP_STACK_DUMMY, | |
819 | ||
820 | /* Stopped at std::terminate. */ | |
821 | STOP_STD_TERMINATE | |
822 | }; | |
823 | ||
c5aa993b JM |
824 | struct bpstat_what |
825 | { | |
826 | enum bpstat_what_main_action main_action; | |
827 | ||
0e2de366 MS |
828 | /* Did we hit a call dummy breakpoint? This only goes with a |
829 | main_action of BPSTAT_WHAT_STOP_SILENT or | |
830 | BPSTAT_WHAT_STOP_NOISY (the concept of continuing from a call | |
831 | dummy without popping the frame is not a useful one). */ | |
aa7d318d | 832 | enum stop_stack_kind call_dummy; |
186c406b TT |
833 | |
834 | /* Used for BPSTAT_WHAT_SET_LONGJMP_RESUME and | |
835 | BPSTAT_WHAT_CLEAR_LONGJMP_RESUME. True if we are handling a | |
836 | longjmp, false if we are handling an exception. */ | |
837 | int is_longjmp; | |
c5aa993b | 838 | }; |
c906108c | 839 | |
5c44784c | 840 | /* The possible return values for print_bpstat, print_it_normal, |
0e2de366 | 841 | print_it_done, print_it_noop. */ |
5c44784c JM |
842 | enum print_stop_action |
843 | { | |
348d480f | 844 | /* We printed nothing or we need to do some more analysis. */ |
5c44784c | 845 | PRINT_UNKNOWN = -1, |
348d480f PA |
846 | |
847 | /* We printed something, and we *do* desire that something to be | |
848 | followed by a location. */ | |
5c44784c | 849 | PRINT_SRC_AND_LOC, |
348d480f PA |
850 | |
851 | /* We printed something, and we do *not* desire that something to | |
852 | be followed by a location. */ | |
5c44784c | 853 | PRINT_SRC_ONLY, |
348d480f PA |
854 | |
855 | /* We already printed all we needed to print, don't print anything | |
856 | else. */ | |
5c44784c JM |
857 | PRINT_NOTHING |
858 | }; | |
859 | ||
c906108c | 860 | /* Tell what to do about this bpstat. */ |
a14ed312 | 861 | struct bpstat_what bpstat_what (bpstat); |
c906108c | 862 | \f |
0e2de366 | 863 | /* Find the bpstat associated with a breakpoint. NULL otherwise. */ |
a14ed312 | 864 | bpstat bpstat_find_breakpoint (bpstat, struct breakpoint *); |
c906108c | 865 | |
c906108c SS |
866 | /* Nonzero if a signal that we got in wait() was due to circumstances |
867 | explained by the BS. */ | |
868 | /* Currently that is true if we have hit a breakpoint, or if there is | |
869 | a watchpoint enabled. */ | |
870 | #define bpstat_explains_signal(bs) ((bs) != NULL) | |
871 | ||
67822962 PA |
872 | /* Nonzero is this bpstat causes a stop. */ |
873 | extern int bpstat_causes_stop (bpstat); | |
874 | ||
c906108c SS |
875 | /* Nonzero if we should step constantly (e.g. watchpoints on machines |
876 | without hardware support). This isn't related to a specific bpstat, | |
877 | just to things like whether watchpoints are set. */ | |
a14ed312 | 878 | extern int bpstat_should_step (void); |
c906108c | 879 | |
c906108c SS |
880 | /* Print a message indicating what happened. Returns nonzero to |
881 | say that only the source line should be printed after this (zero | |
882 | return means print the frame as well as the source line). */ | |
a14ed312 | 883 | extern enum print_stop_action bpstat_print (bpstat); |
c906108c | 884 | |
0e2de366 MS |
885 | /* Put in *NUM the breakpoint number of the first breakpoint we are |
886 | stopped at. *BSP upon return is a bpstat which points to the | |
887 | remaining breakpoints stopped at (but which is not guaranteed to be | |
888 | good for anything but further calls to bpstat_num). | |
889 | ||
8671a17b PA |
890 | Return 0 if passed a bpstat which does not indicate any breakpoints. |
891 | Return -1 if stopped at a breakpoint that has been deleted since | |
892 | we set it. | |
893 | Return 1 otherwise. */ | |
894 | extern int bpstat_num (bpstat *, int *); | |
c906108c | 895 | |
347bddb7 PA |
896 | /* Perform actions associated with the stopped inferior. Actually, we |
897 | just use this for breakpoint commands. Perhaps other actions will | |
898 | go here later, but this is executed at a late time (from the | |
899 | command loop). */ | |
900 | extern void bpstat_do_actions (void); | |
c906108c | 901 | |
e93ca019 JK |
902 | /* Modify all entries of STOP_BPSTAT of INFERIOR_PTID so that the actions will |
903 | not be performed. */ | |
904 | extern void bpstat_clear_actions (void); | |
c906108c | 905 | |
c906108c | 906 | /* Implementation: */ |
e514a9d6 | 907 | |
0e2de366 MS |
908 | /* Values used to tell the printing routine how to behave for this |
909 | bpstat. */ | |
e514a9d6 JM |
910 | enum bp_print_how |
911 | { | |
912 | /* This is used when we want to do a normal printing of the reason | |
0e2de366 MS |
913 | for stopping. The output will depend on the type of eventpoint |
914 | we are dealing with. This is the default value, most commonly | |
915 | used. */ | |
e514a9d6 | 916 | print_it_normal, |
0e2de366 MS |
917 | /* This is used when nothing should be printed for this bpstat |
918 | entry. */ | |
e514a9d6 JM |
919 | print_it_noop, |
920 | /* This is used when everything which needs to be printed has | |
921 | already been printed. But we still want to print the frame. */ | |
922 | print_it_done | |
923 | }; | |
924 | ||
c906108c | 925 | struct bpstats |
c5aa993b | 926 | { |
f431efe5 PA |
927 | /* Linked list because there can be more than one breakpoint at |
928 | the same place, and a bpstat reflects the fact that all have | |
929 | been hit. */ | |
c5aa993b | 930 | bpstat next; |
f431efe5 PA |
931 | |
932 | /* Location that caused the stop. Locations are refcounted, so | |
933 | this will never be NULL. Note that this location may end up | |
934 | detached from a breakpoint, but that does not necessary mean | |
935 | that the struct breakpoint is gone. E.g., consider a | |
936 | watchpoint with a condition that involves an inferior function | |
937 | call. Watchpoint locations are recreated often (on resumes, | |
938 | hence on infcalls too). Between creating the bpstat and after | |
939 | evaluating the watchpoint condition, this location may hence | |
940 | end up detached from its original owner watchpoint, even though | |
941 | the watchpoint is still listed. If it's condition evaluates as | |
942 | true, we still want this location to cause a stop, and we will | |
943 | still need to know which watchpoint it was originally attached. | |
944 | What this means is that we should not (in most cases) follow | |
945 | the `bpstat->bp_location->owner' link, but instead use the | |
946 | `breakpoint_at' field below. */ | |
947 | struct bp_location *bp_location_at; | |
948 | ||
949 | /* Breakpoint that caused the stop. This is nullified if the | |
950 | breakpoint ends up being deleted. See comments on | |
951 | `bp_location_at' above for why do we need this field instead of | |
952 | following the location's owner. */ | |
953 | struct breakpoint *breakpoint_at; | |
954 | ||
9add0f1b TT |
955 | /* The associated command list. */ |
956 | struct counted_command_line *commands; | |
f431efe5 | 957 | |
c5aa993b | 958 | /* Old value associated with a watchpoint. */ |
278cd55f | 959 | struct value *old_val; |
c5aa993b JM |
960 | |
961 | /* Nonzero if this breakpoint tells us to print the frame. */ | |
962 | char print; | |
963 | ||
964 | /* Nonzero if this breakpoint tells us to stop. */ | |
965 | char stop; | |
966 | ||
e514a9d6 JM |
967 | /* Tell bpstat_print and print_bp_stop_message how to print stuff |
968 | associated with this element of the bpstat chain. */ | |
969 | enum bp_print_how print_it; | |
c5aa993b | 970 | }; |
c906108c SS |
971 | |
972 | enum inf_context | |
c5aa993b JM |
973 | { |
974 | inf_starting, | |
975 | inf_running, | |
6ca15a4b PA |
976 | inf_exited, |
977 | inf_execd | |
c5aa993b | 978 | }; |
c2c6d25f JM |
979 | |
980 | /* The possible return values for breakpoint_here_p. | |
981 | We guarantee that zero always means "no breakpoint here". */ | |
982 | enum breakpoint_here | |
983 | { | |
984 | no_breakpoint_here = 0, | |
985 | ordinary_breakpoint_here, | |
986 | permanent_breakpoint_here | |
987 | }; | |
c906108c | 988 | \f |
c5aa993b | 989 | |
c906108c SS |
990 | /* Prototypes for breakpoint-related functions. */ |
991 | ||
0e2de366 MS |
992 | extern enum breakpoint_here breakpoint_here_p (struct address_space *, |
993 | CORE_ADDR); | |
c906108c | 994 | |
6c95b8df | 995 | extern int moribund_breakpoint_here_p (struct address_space *, CORE_ADDR); |
1c5cfe86 | 996 | |
6c95b8df | 997 | extern int breakpoint_inserted_here_p (struct address_space *, CORE_ADDR); |
c906108c | 998 | |
0e2de366 MS |
999 | extern int regular_breakpoint_inserted_here_p (struct address_space *, |
1000 | CORE_ADDR); | |
c36b740a | 1001 | |
0e2de366 MS |
1002 | extern int software_breakpoint_inserted_here_p (struct address_space *, |
1003 | CORE_ADDR); | |
4fa8626c | 1004 | |
9093389c PA |
1005 | /* Returns true if there's a hardware watchpoint or access watchpoint |
1006 | inserted in the range defined by ADDR and LEN. */ | |
1007 | extern int hardware_watchpoint_inserted_in_range (struct address_space *, | |
1008 | CORE_ADDR addr, | |
1009 | ULONGEST len); | |
1010 | ||
0e2de366 MS |
1011 | extern int breakpoint_thread_match (struct address_space *, |
1012 | CORE_ADDR, ptid_t); | |
c906108c | 1013 | |
ae66c1fc | 1014 | extern void until_break_command (char *, int, int); |
c906108c | 1015 | |
28010a5d PA |
1016 | /* Initialize a struct bp_location. */ |
1017 | ||
1018 | extern void init_bp_location (struct bp_location *loc, | |
1019 | const struct bp_location_ops *ops, | |
1020 | struct breakpoint *owner); | |
1021 | ||
0e30163f | 1022 | extern void update_breakpoint_locations (struct breakpoint *b, |
f1310107 TJB |
1023 | struct symtabs_and_lines sals, |
1024 | struct symtabs_and_lines sals_end); | |
0e30163f | 1025 | |
a14ed312 | 1026 | extern void breakpoint_re_set (void); |
69de3c6a | 1027 | |
a14ed312 | 1028 | extern void breakpoint_re_set_thread (struct breakpoint *); |
c906108c | 1029 | |
c906108c | 1030 | extern struct breakpoint *set_momentary_breakpoint |
a6d9a66e | 1031 | (struct gdbarch *, struct symtab_and_line, struct frame_id, enum bptype); |
c906108c | 1032 | |
611c83ae | 1033 | extern struct breakpoint *set_momentary_breakpoint_at_pc |
a6d9a66e | 1034 | (struct gdbarch *, CORE_ADDR pc, enum bptype type); |
611c83ae | 1035 | |
e58b0e63 PA |
1036 | extern struct breakpoint *clone_momentary_breakpoint (struct breakpoint *bpkt); |
1037 | ||
a14ed312 | 1038 | extern void set_ignore_count (int, int, int); |
c906108c | 1039 | |
a14ed312 | 1040 | extern void breakpoint_init_inferior (enum inf_context); |
c906108c | 1041 | |
4d6140d9 AC |
1042 | extern struct cleanup *make_cleanup_delete_breakpoint (struct breakpoint *); |
1043 | ||
a14ed312 | 1044 | extern void delete_breakpoint (struct breakpoint *); |
c906108c | 1045 | |
a14ed312 | 1046 | extern void breakpoint_auto_delete (bpstat); |
c906108c | 1047 | |
5cea2a26 PA |
1048 | /* Return the chain of command lines to execute when this breakpoint |
1049 | is hit. */ | |
1050 | extern struct command_line *breakpoint_commands (struct breakpoint *b); | |
1051 | ||
956a9fb9 JB |
1052 | /* Return a string image of DISP. The string is static, and thus should |
1053 | NOT be deallocated after use. */ | |
1054 | const char *bpdisp_text (enum bpdisp disp); | |
1055 | ||
a14ed312 | 1056 | extern void break_command (char *, int); |
c906108c | 1057 | |
a14ed312 KB |
1058 | extern void hbreak_command_wrapper (char *, int); |
1059 | extern void thbreak_command_wrapper (char *, int); | |
1060 | extern void rbreak_command_wrapper (char *, int); | |
84f4c1fe PM |
1061 | extern void watch_command_wrapper (char *, int, int); |
1062 | extern void awatch_command_wrapper (char *, int, int); | |
1063 | extern void rwatch_command_wrapper (char *, int, int); | |
a14ed312 | 1064 | extern void tbreak_command (char *, int); |
c906108c | 1065 | |
348d480f PA |
1066 | extern struct breakpoint_ops bkpt_breakpoint_ops; |
1067 | ||
2060206e | 1068 | extern void initialize_breakpoint_ops (void); |
348d480f | 1069 | |
9ac4176b PA |
1070 | /* Arguments to pass as context to some catch command handlers. */ |
1071 | #define CATCH_PERMANENT ((void *) (uintptr_t) 0) | |
1072 | #define CATCH_TEMPORARY ((void *) (uintptr_t) 1) | |
1073 | ||
1074 | /* Like add_cmd, but add the command to both the "catch" and "tcatch" | |
1075 | lists, and pass some additional user data to the command | |
1076 | function. */ | |
1077 | ||
1078 | extern void | |
1079 | add_catch_command (char *name, char *docstring, | |
1080 | void (*sfunc) (char *args, int from_tty, | |
1081 | struct cmd_list_element *command), | |
1082 | char **(*completer) (struct cmd_list_element *cmd, | |
1083 | char *text, char *word), | |
1084 | void *user_data_catch, | |
1085 | void *user_data_tcatch); | |
1086 | ||
28010a5d | 1087 | /* Initialize a breakpoint struct for Ada exception catchpoints. */ |
9ac4176b PA |
1088 | |
1089 | extern void | |
28010a5d PA |
1090 | init_ada_exception_breakpoint (struct breakpoint *b, |
1091 | struct gdbarch *gdbarch, | |
1092 | struct symtab_and_line sal, | |
1093 | char *addr_string, | |
c0a91b2b | 1094 | const struct breakpoint_ops *ops, |
28010a5d PA |
1095 | int tempflag, |
1096 | int from_tty); | |
1097 | ||
1098 | /* Add breakpoint B on the breakpoint list, and notify the user, the | |
3a5c3e22 PA |
1099 | target and breakpoint_created observers of its existence. If |
1100 | INTERNAL is non-zero, the breakpoint number will be allocated from | |
3ea46bff YQ |
1101 | the internal breakpoint count. If UPDATE_GLL is non-zero, |
1102 | update_global_location_list will be called. */ | |
28010a5d | 1103 | |
3ea46bff YQ |
1104 | extern void install_breakpoint (int internal, struct breakpoint *b, |
1105 | int update_gll); | |
9ac4176b | 1106 | |
8cdf0e15 VP |
1107 | extern int create_breakpoint (struct gdbarch *gdbarch, char *arg, |
1108 | char *cond_string, int thread, | |
1109 | int parse_condition_and_thread, | |
0fb4aa4b | 1110 | int tempflag, enum bptype wanted_type, |
8cdf0e15 VP |
1111 | int ignore_count, |
1112 | enum auto_boolean pending_break_support, | |
c0a91b2b | 1113 | const struct breakpoint_ops *ops, |
8cdf0e15 | 1114 | int from_tty, |
84f4c1fe PM |
1115 | int enabled, |
1116 | int internal); | |
98deb0da | 1117 | |
e236ba44 | 1118 | extern void insert_breakpoints (void); |
c906108c | 1119 | |
a14ed312 | 1120 | extern int remove_breakpoints (void); |
c906108c | 1121 | |
6c95b8df PA |
1122 | extern int remove_breakpoints_pid (int pid); |
1123 | ||
c906108c SS |
1124 | /* This function can be used to physically insert eventpoints from the |
1125 | specified traced inferior process, without modifying the breakpoint | |
0e2de366 MS |
1126 | package's state. This can be useful for those targets which |
1127 | support following the processes of a fork() or vfork() system call, | |
1128 | when both of the resulting two processes are to be followed. */ | |
a14ed312 | 1129 | extern int reattach_breakpoints (int); |
c906108c SS |
1130 | |
1131 | /* This function can be used to update the breakpoint package's state | |
1132 | after an exec() system call has been executed. | |
1133 | ||
1134 | This function causes the following: | |
1135 | ||
c5aa993b JM |
1136 | - All eventpoints are marked "not inserted". |
1137 | - All eventpoints with a symbolic address are reset such that | |
1138 | the symbolic address must be reevaluated before the eventpoints | |
1139 | can be reinserted. | |
1140 | - The solib breakpoints are explicitly removed from the breakpoint | |
1141 | list. | |
1142 | - A step-resume breakpoint, if any, is explicitly removed from the | |
1143 | breakpoint list. | |
1144 | - All eventpoints without a symbolic address are removed from the | |
0e2de366 | 1145 | breakpoint list. */ |
a14ed312 | 1146 | extern void update_breakpoints_after_exec (void); |
c906108c SS |
1147 | |
1148 | /* This function can be used to physically remove hardware breakpoints | |
1149 | and watchpoints from the specified traced inferior process, without | |
1150 | modifying the breakpoint package's state. This can be useful for | |
1151 | those targets which support following the processes of a fork() or | |
1152 | vfork() system call, when one of the resulting two processes is to | |
1153 | be detached and allowed to run free. | |
c5aa993b | 1154 | |
c906108c | 1155 | It is an error to use this function on the process whose id is |
39f77062 | 1156 | inferior_ptid. */ |
a14ed312 | 1157 | extern int detach_breakpoints (int); |
c5aa993b | 1158 | |
6c95b8df PA |
1159 | /* This function is called when program space PSPACE is about to be |
1160 | deleted. It takes care of updating breakpoints to not reference | |
1161 | this PSPACE anymore. */ | |
1162 | extern void breakpoint_program_space_exit (struct program_space *pspace); | |
1163 | ||
186c406b TT |
1164 | extern void set_longjmp_breakpoint (struct thread_info *tp, |
1165 | struct frame_id frame); | |
611c83ae PA |
1166 | extern void delete_longjmp_breakpoint (int thread); |
1167 | ||
1900040c MS |
1168 | extern void enable_overlay_breakpoints (void); |
1169 | extern void disable_overlay_breakpoints (void); | |
c906108c | 1170 | |
aa7d318d TT |
1171 | extern void set_std_terminate_breakpoint (void); |
1172 | extern void delete_std_terminate_breakpoint (void); | |
1173 | ||
c906108c SS |
1174 | /* These functions respectively disable or reenable all currently |
1175 | enabled watchpoints. When disabled, the watchpoints are marked | |
64b9b334 | 1176 | call_disabled. When re-enabled, they are marked enabled. |
c906108c | 1177 | |
04714b91 | 1178 | The intended client of these functions is call_function_by_hand. |
c906108c SS |
1179 | |
1180 | The inferior must be stopped, and all breakpoints removed, when | |
1181 | these functions are used. | |
1182 | ||
1183 | The need for these functions is that on some targets (e.g., HP-UX), | |
1184 | gdb is unable to unwind through the dummy frame that is pushed as | |
1185 | part of the implementation of a call command. Watchpoints can | |
1186 | cause the inferior to stop in places where this frame is visible, | |
1187 | and that can cause execution control to become very confused. | |
1188 | ||
7e73cedf | 1189 | Note that if a user sets breakpoints in an interactively called |
64b9b334 | 1190 | function, the call_disabled watchpoints will have been re-enabled |
c906108c SS |
1191 | when the first such breakpoint is reached. However, on targets |
1192 | that are unable to unwind through the call dummy frame, watches | |
1193 | of stack-based storage may then be deleted, because gdb will | |
1194 | believe that their watched storage is out of scope. (Sigh.) */ | |
a14ed312 | 1195 | extern void disable_watchpoints_before_interactive_call_start (void); |
c906108c | 1196 | |
a14ed312 | 1197 | extern void enable_watchpoints_after_interactive_call_stop (void); |
c906108c | 1198 | |
8bea4e01 UW |
1199 | /* These functions disable and re-enable all breakpoints during |
1200 | inferior startup. They are intended to be called from solib | |
1201 | code where necessary. This is needed on platforms where the | |
1202 | main executable is relocated at some point during startup | |
1203 | processing, making breakpoint addresses invalid. | |
1204 | ||
1205 | If additional breakpoints are created after the routine | |
1206 | disable_breakpoints_before_startup but before the routine | |
1207 | enable_breakpoints_after_startup was called, they will also | |
1208 | be marked as disabled. */ | |
1209 | extern void disable_breakpoints_before_startup (void); | |
1210 | extern void enable_breakpoints_after_startup (void); | |
1211 | ||
40c03ae8 | 1212 | /* For script interpreters that need to define breakpoint commands |
0e2de366 MS |
1213 | after they've already read the commands into a struct |
1214 | command_line. */ | |
40c03ae8 EZ |
1215 | extern enum command_control_type commands_from_control_command |
1216 | (char *arg, struct command_line *cmd); | |
c5aa993b | 1217 | |
a14ed312 | 1218 | extern void clear_breakpoint_hit_counts (void); |
c906108c | 1219 | |
48cb2d85 VP |
1220 | extern struct breakpoint *get_breakpoint (int num); |
1221 | ||
0e2de366 MS |
1222 | /* The following are for displays, which aren't really breakpoints, |
1223 | but here is as good a place as any for them. */ | |
c906108c | 1224 | |
a14ed312 | 1225 | extern void disable_current_display (void); |
c906108c | 1226 | |
a14ed312 | 1227 | extern void do_displays (void); |
c906108c | 1228 | |
a14ed312 | 1229 | extern void disable_display (int); |
c906108c | 1230 | |
a14ed312 | 1231 | extern void clear_displays (void); |
c906108c | 1232 | |
a14ed312 | 1233 | extern void disable_breakpoint (struct breakpoint *); |
c906108c | 1234 | |
a14ed312 | 1235 | extern void enable_breakpoint (struct breakpoint *); |
c906108c | 1236 | |
48cb2d85 VP |
1237 | extern void breakpoint_set_commands (struct breakpoint *b, |
1238 | struct command_line *commands); | |
1239 | ||
45a43567 TT |
1240 | extern void breakpoint_set_silent (struct breakpoint *b, int silent); |
1241 | ||
1242 | extern void breakpoint_set_thread (struct breakpoint *b, int thread); | |
1243 | ||
1244 | extern void breakpoint_set_task (struct breakpoint *b, int task); | |
1245 | ||
25b22b0a PA |
1246 | /* Clear the "inserted" flag in all breakpoints. */ |
1247 | extern void mark_breakpoints_out (void); | |
1248 | ||
a14ed312 | 1249 | extern void make_breakpoint_permanent (struct breakpoint *); |
c2c6d25f | 1250 | |
4efc6507 DE |
1251 | extern struct breakpoint *create_jit_event_breakpoint (struct gdbarch *, |
1252 | CORE_ADDR); | |
1253 | ||
a6d9a66e UW |
1254 | extern struct breakpoint *create_solib_event_breakpoint (struct gdbarch *, |
1255 | CORE_ADDR); | |
c906108c | 1256 | |
a6d9a66e UW |
1257 | extern struct breakpoint *create_thread_event_breakpoint (struct gdbarch *, |
1258 | CORE_ADDR); | |
c4093a6a | 1259 | |
03673fc7 PP |
1260 | extern void remove_jit_event_breakpoints (void); |
1261 | ||
a14ed312 | 1262 | extern void remove_solib_event_breakpoints (void); |
c906108c | 1263 | |
a14ed312 | 1264 | extern void remove_thread_event_breakpoints (void); |
c4093a6a | 1265 | |
cb851954 | 1266 | extern void disable_breakpoints_in_shlibs (void); |
c906108c | 1267 | |
0e2de366 | 1268 | /* This function returns TRUE if ep is a catchpoint. */ |
a14ed312 | 1269 | extern int ep_is_catchpoint (struct breakpoint *); |
c5aa993b | 1270 | |
c2c6d25f | 1271 | /* Enable breakpoints and delete when hit. Called with ARG == NULL |
0e2de366 | 1272 | deletes all breakpoints. */ |
c2c6d25f JM |
1273 | extern void delete_command (char *arg, int from_tty); |
1274 | ||
0e2de366 MS |
1275 | /* Manage a software single step breakpoint (or two). Insert may be |
1276 | called twice before remove is called. */ | |
6c95b8df | 1277 | extern void insert_single_step_breakpoint (struct gdbarch *, |
0e2de366 MS |
1278 | struct address_space *, |
1279 | CORE_ADDR); | |
f02253f1 | 1280 | extern int single_step_breakpoints_inserted (void); |
8181d85f | 1281 | extern void remove_single_step_breakpoints (void); |
d03285ec | 1282 | extern void cancel_single_step_breakpoints (void); |
8181d85f DJ |
1283 | |
1284 | /* Manage manual breakpoints, separate from the normal chain of | |
1285 | breakpoints. These functions are used in murky target-specific | |
1286 | ways. Please do not add more uses! */ | |
6c95b8df | 1287 | extern void *deprecated_insert_raw_breakpoint (struct gdbarch *, |
0e2de366 MS |
1288 | struct address_space *, |
1289 | CORE_ADDR); | |
a6d9a66e | 1290 | extern int deprecated_remove_raw_breakpoint (struct gdbarch *, void *); |
f83f82bc | 1291 | |
d983da9c DJ |
1292 | /* Check if any hardware watchpoints have triggered, according to the |
1293 | target. */ | |
1294 | int watchpoints_triggered (struct target_waitstatus *); | |
1295 | ||
8defab1a DJ |
1296 | /* Update BUF, which is LEN bytes read from the target address MEMADDR, |
1297 | by replacing any memory breakpoints with their shadowed contents. */ | |
1298 | void breakpoint_restore_shadows (gdb_byte *buf, ULONGEST memaddr, | |
1299 | LONGEST len); | |
1300 | ||
74960c60 VP |
1301 | extern int breakpoints_always_inserted_mode (void); |
1302 | ||
20874c92 VP |
1303 | /* Called each time new event from target is processed. |
1304 | Retires previously deleted breakpoint locations that | |
1305 | in our opinion won't ever trigger. */ | |
1306 | extern void breakpoint_retire_moribund (void); | |
1307 | ||
adc36818 PM |
1308 | /* Set break condition of breakpoint B to EXP. */ |
1309 | extern void set_breakpoint_condition (struct breakpoint *b, char *exp, | |
1310 | int from_tty); | |
1311 | ||
a96d9b2e SDJ |
1312 | /* Checks if we are catching syscalls or not. |
1313 | Returns 0 if not, greater than 0 if we are. */ | |
1314 | extern int catch_syscall_enabled (void); | |
1315 | ||
1316 | /* Checks if we are catching syscalls with the specific | |
1317 | syscall_number. Used for "filtering" the catchpoints. | |
1318 | Returns 0 if not, greater than 0 if we are. */ | |
1319 | extern int catching_syscall_number (int syscall_number); | |
1320 | ||
1042e4c0 | 1321 | /* Return a tracepoint with the given number if found. */ |
d9b3f62e | 1322 | extern struct tracepoint *get_tracepoint (int num); |
1042e4c0 | 1323 | |
d9b3f62e | 1324 | extern struct tracepoint *get_tracepoint_by_number_on_target (int num); |
d5551862 | 1325 | |
1042e4c0 | 1326 | /* Find a tracepoint by parsing a number in the supplied string. */ |
d9b3f62e | 1327 | extern struct tracepoint * |
197f0a60 TT |
1328 | get_tracepoint_by_number (char **arg, |
1329 | struct get_number_or_range_state *state, | |
1330 | int optional_p); | |
1042e4c0 SS |
1331 | |
1332 | /* Return a vector of all tracepoints currently defined. The vector | |
1333 | is newly allocated; the caller should free when done with it. */ | |
1334 | extern VEC(breakpoint_p) *all_tracepoints (void); | |
1335 | ||
d77f58be | 1336 | extern int is_tracepoint (const struct breakpoint *b); |
a7bdde9e | 1337 | |
0fb4aa4b PA |
1338 | /* Return a vector of all static tracepoints defined at ADDR. The |
1339 | vector is newly allocated; the caller should free when done with | |
1340 | it. */ | |
1341 | extern VEC(breakpoint_p) *static_tracepoints_here (CORE_ADDR addr); | |
1342 | ||
a7bdde9e VP |
1343 | /* Function that can be passed to read_command_line to validate |
1344 | that each command is suitable for tracepoint command list. */ | |
1345 | extern void check_tracepoint_command (char *line, void *closure); | |
1346 | ||
95a42b64 TT |
1347 | /* Call at the start and end of an "rbreak" command to register |
1348 | breakpoint numbers for a later "commands" command. */ | |
1349 | extern void start_rbreak_breakpoints (void); | |
1350 | extern void end_rbreak_breakpoints (void); | |
1351 | ||
84f4c1fe PM |
1352 | /* Breakpoint iterator function. |
1353 | ||
1354 | Calls a callback function once for each breakpoint, so long as the | |
1355 | callback function returns false. If the callback function returns | |
1356 | true, the iteration will end and the current breakpoint will be | |
1357 | returned. This can be useful for implementing a search for a | |
1358 | breakpoint with arbitrary attributes, or for applying an operation | |
1359 | to every breakpoint. */ | |
1360 | extern struct breakpoint *iterate_over_breakpoints (int (*) (struct breakpoint *, | |
1361 | void *), void *); | |
1362 | ||
0574c78f GB |
1363 | /* Nonzero if the specified PC cannot be a location where functions |
1364 | have been inlined. */ | |
1365 | ||
1366 | extern int pc_at_non_inline_function (struct address_space *aspace, | |
1367 | CORE_ADDR pc); | |
1368 | ||
09d682a4 TT |
1369 | extern int user_breakpoint_p (struct breakpoint *); |
1370 | ||
1bfeeb0f JL |
1371 | /* Attempt to determine architecture of location identified by SAL. */ |
1372 | extern struct gdbarch *get_sal_arch (struct symtab_and_line sal); | |
1373 | ||
c906108c | 1374 | #endif /* !defined (BREAKPOINT_H) */ |