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916703c0 TT |
1 | /* Everything about catch/throw catchpoints, for GDB. |
2 | ||
618f726f | 3 | Copyright (C) 1986-2016 Free Software Foundation, Inc. |
916703c0 TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "arch-utils.h" | |
22 | #include <ctype.h> | |
23 | #include "breakpoint.h" | |
24 | #include "gdbcmd.h" | |
25 | #include "inferior.h" | |
26 | #include "annotate.h" | |
27 | #include "valprint.h" | |
28 | #include "cli/cli-utils.h" | |
29 | #include "completer.h" | |
30 | #include "gdb_obstack.h" | |
31 | #include "mi/mi-common.h" | |
15a73f56 | 32 | #include "linespec.h" |
fc4746a2 | 33 | #include "probe.h" |
72f1fe8a TT |
34 | #include "objfiles.h" |
35 | #include "cp-abi.h" | |
cc16e6c9 TT |
36 | #include "gdb_regex.h" |
37 | #include "cp-support.h" | |
f00aae0f | 38 | #include "location.h" |
916703c0 TT |
39 | |
40 | /* Enums for exception-handling support. */ | |
41 | enum exception_event_kind | |
42 | { | |
43 | EX_EVENT_THROW, | |
44 | EX_EVENT_RETHROW, | |
45 | EX_EVENT_CATCH | |
46 | }; | |
47 | ||
fc4746a2 TT |
48 | /* Each spot where we may place an exception-related catchpoint has |
49 | two names: the SDT probe point and the function name. This | |
50 | structure holds both. */ | |
51 | ||
52 | struct exception_names | |
53 | { | |
54 | /* The name of the probe point to try, in the form accepted by | |
55 | 'parse_probes'. */ | |
56 | ||
57 | const char *probe; | |
58 | ||
59 | /* The name of the corresponding function. */ | |
60 | ||
61 | const char *function; | |
62 | }; | |
63 | ||
64 | /* Names of the probe points and functions on which to break. This is | |
65 | indexed by exception_event_kind. */ | |
66 | static const struct exception_names exception_functions[] = | |
15a73f56 | 67 | { |
fc4746a2 TT |
68 | { "-probe-stap libstdcxx:throw", "__cxa_throw" }, |
69 | { "-probe-stap libstdcxx:rethrow", "__cxa_rethrow" }, | |
70 | { "-probe-stap libstdcxx:catch", "__cxa_begin_catch" } | |
15a73f56 TT |
71 | }; |
72 | ||
73 | static struct breakpoint_ops gnu_v3_exception_catchpoint_ops; | |
74 | ||
75 | /* The type of an exception catchpoint. */ | |
76 | ||
77 | struct exception_catchpoint | |
78 | { | |
79 | /* The base class. */ | |
80 | ||
81 | struct breakpoint base; | |
82 | ||
83 | /* The kind of exception catchpoint. */ | |
84 | ||
85 | enum exception_event_kind kind; | |
cc16e6c9 TT |
86 | |
87 | /* If non-NULL, an xmalloc'd string holding the source form of the | |
88 | regular expression to match against. */ | |
89 | ||
90 | char *exception_rx; | |
91 | ||
92 | /* If non-NULL, an xmalloc'd, compiled regular expression which is | |
93 | used to determine which exceptions to stop on. */ | |
94 | ||
95 | regex_t *pattern; | |
15a73f56 TT |
96 | }; |
97 | ||
cc16e6c9 TT |
98 | \f |
99 | ||
100 | /* A helper function that fetches exception probe arguments. This | |
101 | fills in *ARG0 (if non-NULL) and *ARG1 (which must be non-NULL). | |
102 | It will throw an exception on any kind of failure. */ | |
103 | ||
104 | static void | |
105 | fetch_probe_arguments (struct value **arg0, struct value **arg1) | |
106 | { | |
107 | struct frame_info *frame = get_selected_frame (_("No frame selected")); | |
108 | CORE_ADDR pc = get_frame_pc (frame); | |
729662a5 | 109 | struct bound_probe pc_probe; |
cc16e6c9 TT |
110 | const struct sym_probe_fns *pc_probe_fns; |
111 | unsigned n_args; | |
112 | ||
113 | pc_probe = find_probe_by_pc (pc); | |
729662a5 TT |
114 | if (pc_probe.probe == NULL |
115 | || strcmp (pc_probe.probe->provider, "libstdcxx") != 0 | |
116 | || (strcmp (pc_probe.probe->name, "catch") != 0 | |
117 | && strcmp (pc_probe.probe->name, "throw") != 0 | |
118 | && strcmp (pc_probe.probe->name, "rethrow") != 0)) | |
cc16e6c9 TT |
119 | error (_("not stopped at a C++ exception catchpoint")); |
120 | ||
729662a5 | 121 | n_args = get_probe_argument_count (pc_probe.probe, frame); |
cc16e6c9 TT |
122 | if (n_args < 2) |
123 | error (_("C++ exception catchpoint has too few arguments")); | |
124 | ||
125 | if (arg0 != NULL) | |
729662a5 TT |
126 | *arg0 = evaluate_probe_argument (pc_probe.probe, 0, frame); |
127 | *arg1 = evaluate_probe_argument (pc_probe.probe, 1, frame); | |
cc16e6c9 TT |
128 | |
129 | if ((arg0 != NULL && *arg0 == NULL) || *arg1 == NULL) | |
130 | error (_("error computing probe argument at c++ exception catchpoint")); | |
131 | } | |
132 | ||
133 | \f | |
134 | ||
916703c0 TT |
135 | /* A helper function that returns a value indicating the kind of the |
136 | exception catchpoint B. */ | |
137 | ||
138 | static enum exception_event_kind | |
139 | classify_exception_breakpoint (struct breakpoint *b) | |
140 | { | |
15a73f56 TT |
141 | struct exception_catchpoint *cp = (struct exception_catchpoint *) b; |
142 | ||
143 | return cp->kind; | |
144 | } | |
145 | ||
cc16e6c9 TT |
146 | /* Implement the 'dtor' method. */ |
147 | ||
148 | static void | |
149 | dtor_exception_catchpoint (struct breakpoint *self) | |
150 | { | |
151 | struct exception_catchpoint *cp = (struct exception_catchpoint *) self; | |
152 | ||
153 | xfree (cp->exception_rx); | |
154 | if (cp->pattern != NULL) | |
155 | regfree (cp->pattern); | |
156 | bkpt_breakpoint_ops.dtor (self); | |
157 | } | |
158 | ||
159 | /* Implement the 'check_status' method. */ | |
160 | ||
161 | static void | |
162 | check_status_exception_catchpoint (struct bpstats *bs) | |
163 | { | |
164 | struct exception_catchpoint *self | |
165 | = (struct exception_catchpoint *) bs->breakpoint_at; | |
fe978cb0 | 166 | char *type_name = NULL; |
cc16e6c9 TT |
167 | |
168 | bkpt_breakpoint_ops.check_status (bs); | |
169 | if (bs->stop == 0) | |
170 | return; | |
171 | ||
172 | if (self->pattern == NULL) | |
173 | return; | |
174 | ||
492d29ea | 175 | TRY |
cc16e6c9 TT |
176 | { |
177 | struct value *typeinfo_arg; | |
178 | char *canon; | |
179 | ||
180 | fetch_probe_arguments (NULL, &typeinfo_arg); | |
fe978cb0 | 181 | type_name = cplus_typename_from_type_info (typeinfo_arg); |
cc16e6c9 | 182 | |
fe978cb0 | 183 | canon = cp_canonicalize_string (type_name); |
cc16e6c9 TT |
184 | if (canon != NULL) |
185 | { | |
fe978cb0 PA |
186 | xfree (type_name); |
187 | type_name = canon; | |
cc16e6c9 TT |
188 | } |
189 | } | |
492d29ea PA |
190 | CATCH (e, RETURN_MASK_ERROR) |
191 | { | |
192 | exception_print (gdb_stderr, e); | |
193 | } | |
194 | END_CATCH | |
cc16e6c9 | 195 | |
7556d4a4 PA |
196 | if (type_name != NULL) |
197 | { | |
198 | if (regexec (self->pattern, type_name, 0, NULL, 0) != 0) | |
199 | bs->stop = 0; | |
200 | ||
201 | xfree (type_name); | |
202 | } | |
cc16e6c9 TT |
203 | } |
204 | ||
15a73f56 TT |
205 | /* Implement the 're_set' method. */ |
206 | ||
207 | static void | |
208 | re_set_exception_catchpoint (struct breakpoint *self) | |
209 | { | |
210 | struct symtabs_and_lines sals = {0}; | |
211 | struct symtabs_and_lines sals_end = {0}; | |
15a73f56 TT |
212 | struct cleanup *cleanup; |
213 | enum exception_event_kind kind = classify_exception_breakpoint (self); | |
f00aae0f | 214 | struct event_location *location; |
c2f4122d | 215 | struct program_space *filter_pspace = current_program_space; |
15a73f56 | 216 | |
1bff71c3 | 217 | /* We first try to use the probe interface. */ |
492d29ea | 218 | TRY |
15a73f56 | 219 | { |
5b56227b KS |
220 | location |
221 | = new_probe_location (exception_functions[kind].probe); | |
f00aae0f | 222 | cleanup = make_cleanup_delete_event_location (location); |
c2f4122d | 223 | sals = parse_probes (location, filter_pspace, NULL); |
f00aae0f | 224 | do_cleanups (cleanup); |
1bff71c3 | 225 | } |
492d29ea | 226 | CATCH (e, RETURN_MASK_ERROR) |
1bff71c3 | 227 | { |
1bff71c3 SDJ |
228 | /* Using the probe interface failed. Let's fallback to the normal |
229 | catchpoint mode. */ | |
492d29ea | 230 | TRY |
fc4746a2 | 231 | { |
67994074 | 232 | struct explicit_location explicit_loc; |
1bff71c3 | 233 | |
67994074 KS |
234 | initialize_explicit_location (&explicit_loc); |
235 | explicit_loc.function_name | |
00e52e53 | 236 | = ASTRDUP (exception_functions[kind].function); |
67994074 | 237 | location = new_explicit_location (&explicit_loc); |
f00aae0f | 238 | cleanup = make_cleanup_delete_event_location (location); |
c2f4122d | 239 | self->ops->decode_location (self, location, filter_pspace, &sals); |
f00aae0f | 240 | do_cleanups (cleanup); |
fc4746a2 | 241 | } |
492d29ea | 242 | CATCH (ex, RETURN_MASK_ERROR) |
7556d4a4 PA |
243 | { |
244 | /* NOT_FOUND_ERROR just means the breakpoint will be | |
245 | pending, so let it through. */ | |
246 | if (ex.error != NOT_FOUND_ERROR) | |
247 | throw_exception (ex); | |
248 | } | |
492d29ea | 249 | END_CATCH |
15a73f56 | 250 | } |
492d29ea | 251 | END_CATCH |
15a73f56 TT |
252 | |
253 | cleanup = make_cleanup (xfree, sals.sals); | |
c2f4122d | 254 | update_breakpoint_locations (self, filter_pspace, sals, sals_end); |
15a73f56 | 255 | do_cleanups (cleanup); |
916703c0 TT |
256 | } |
257 | ||
258 | static enum print_stop_action | |
259 | print_it_exception_catchpoint (bpstat bs) | |
260 | { | |
261 | struct ui_out *uiout = current_uiout; | |
262 | struct breakpoint *b = bs->breakpoint_at; | |
263 | int bp_temp; | |
264 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
265 | ||
266 | annotate_catchpoint (b->number); | |
f303dbd6 | 267 | maybe_print_thread_hit_breakpoint (uiout); |
916703c0 TT |
268 | |
269 | bp_temp = b->disposition == disp_del; | |
270 | ui_out_text (uiout, | |
271 | bp_temp ? "Temporary catchpoint " | |
272 | : "Catchpoint "); | |
273 | if (!ui_out_is_mi_like_p (uiout)) | |
274 | ui_out_field_int (uiout, "bkptno", b->number); | |
275 | ui_out_text (uiout, | |
276 | (kind == EX_EVENT_THROW ? " (exception thrown), " | |
277 | : (kind == EX_EVENT_CATCH ? " (exception caught), " | |
278 | : " (exception rethrown), "))); | |
279 | if (ui_out_is_mi_like_p (uiout)) | |
280 | { | |
281 | ui_out_field_string (uiout, "reason", | |
282 | async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); | |
283 | ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition)); | |
284 | ui_out_field_int (uiout, "bkptno", b->number); | |
285 | } | |
286 | return PRINT_SRC_AND_LOC; | |
287 | } | |
288 | ||
289 | static void | |
290 | print_one_exception_catchpoint (struct breakpoint *b, | |
291 | struct bp_location **last_loc) | |
292 | { | |
293 | struct value_print_options opts; | |
294 | struct ui_out *uiout = current_uiout; | |
295 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
296 | ||
297 | get_user_print_options (&opts); | |
298 | if (opts.addressprint) | |
299 | { | |
300 | annotate_field (4); | |
301 | if (b->loc == NULL || b->loc->shlib_disabled) | |
302 | ui_out_field_string (uiout, "addr", "<PENDING>"); | |
303 | else | |
304 | ui_out_field_core_addr (uiout, "addr", | |
305 | b->loc->gdbarch, b->loc->address); | |
306 | } | |
307 | annotate_field (5); | |
308 | if (b->loc) | |
309 | *last_loc = b->loc; | |
310 | ||
311 | switch (kind) | |
312 | { | |
313 | case EX_EVENT_THROW: | |
314 | ui_out_field_string (uiout, "what", "exception throw"); | |
315 | if (ui_out_is_mi_like_p (uiout)) | |
316 | ui_out_field_string (uiout, "catch-type", "throw"); | |
317 | break; | |
318 | ||
319 | case EX_EVENT_RETHROW: | |
320 | ui_out_field_string (uiout, "what", "exception rethrow"); | |
321 | if (ui_out_is_mi_like_p (uiout)) | |
322 | ui_out_field_string (uiout, "catch-type", "rethrow"); | |
323 | break; | |
324 | ||
325 | case EX_EVENT_CATCH: | |
326 | ui_out_field_string (uiout, "what", "exception catch"); | |
327 | if (ui_out_is_mi_like_p (uiout)) | |
328 | ui_out_field_string (uiout, "catch-type", "catch"); | |
329 | break; | |
330 | } | |
331 | } | |
332 | ||
cc16e6c9 TT |
333 | /* Implement the 'print_one_detail' method. */ |
334 | ||
335 | static void | |
336 | print_one_detail_exception_catchpoint (const struct breakpoint *b, | |
337 | struct ui_out *uiout) | |
338 | { | |
339 | const struct exception_catchpoint *cp | |
340 | = (const struct exception_catchpoint *) b; | |
341 | ||
342 | if (cp->exception_rx != NULL) | |
343 | { | |
344 | ui_out_text (uiout, _("\tmatching: ")); | |
345 | ui_out_field_string (uiout, "regexp", cp->exception_rx); | |
346 | ui_out_text (uiout, "\n"); | |
347 | } | |
348 | } | |
349 | ||
916703c0 TT |
350 | static void |
351 | print_mention_exception_catchpoint (struct breakpoint *b) | |
352 | { | |
353 | struct ui_out *uiout = current_uiout; | |
354 | int bp_temp; | |
355 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
356 | ||
357 | bp_temp = b->disposition == disp_del; | |
358 | ui_out_text (uiout, bp_temp ? _("Temporary catchpoint ") | |
359 | : _("Catchpoint ")); | |
360 | ui_out_field_int (uiout, "bkptno", b->number); | |
361 | ui_out_text (uiout, (kind == EX_EVENT_THROW ? _(" (throw)") | |
362 | : (kind == EX_EVENT_CATCH ? _(" (catch)") | |
363 | : _(" (rethrow)")))); | |
364 | } | |
365 | ||
366 | /* Implement the "print_recreate" breakpoint_ops method for throw and | |
367 | catch catchpoints. */ | |
368 | ||
369 | static void | |
370 | print_recreate_exception_catchpoint (struct breakpoint *b, | |
371 | struct ui_file *fp) | |
372 | { | |
373 | int bp_temp; | |
374 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
375 | ||
376 | bp_temp = b->disposition == disp_del; | |
377 | fprintf_unfiltered (fp, bp_temp ? "tcatch " : "catch "); | |
378 | switch (kind) | |
379 | { | |
380 | case EX_EVENT_THROW: | |
381 | fprintf_unfiltered (fp, "throw"); | |
382 | break; | |
383 | case EX_EVENT_CATCH: | |
384 | fprintf_unfiltered (fp, "catch"); | |
385 | break; | |
386 | case EX_EVENT_RETHROW: | |
387 | fprintf_unfiltered (fp, "rethrow"); | |
388 | break; | |
389 | } | |
390 | print_recreate_thread (b, fp); | |
391 | } | |
392 | ||
15a73f56 | 393 | static void |
cc16e6c9 | 394 | handle_gnu_v3_exceptions (int tempflag, char *except_rx, char *cond_string, |
916703c0 TT |
395 | enum exception_event_kind ex_event, int from_tty) |
396 | { | |
15a73f56 | 397 | struct exception_catchpoint *cp; |
cc16e6c9 TT |
398 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); |
399 | regex_t *pattern = NULL; | |
400 | ||
401 | if (except_rx != NULL) | |
402 | { | |
403 | pattern = XNEW (regex_t); | |
404 | make_cleanup (xfree, pattern); | |
405 | ||
406 | compile_rx_or_error (pattern, except_rx, | |
407 | _("invalid type-matching regexp")); | |
408 | } | |
916703c0 | 409 | |
15a73f56 | 410 | cp = XCNEW (struct exception_catchpoint); |
cc16e6c9 TT |
411 | make_cleanup (xfree, cp); |
412 | ||
15a73f56 TT |
413 | init_catchpoint (&cp->base, get_current_arch (), tempflag, cond_string, |
414 | &gnu_v3_exception_catchpoint_ops); | |
415 | /* We need to reset 'type' in order for code in breakpoint.c to do | |
416 | the right thing. */ | |
417 | cp->base.type = bp_breakpoint; | |
418 | cp->kind = ex_event; | |
cc16e6c9 TT |
419 | cp->exception_rx = except_rx; |
420 | cp->pattern = pattern; | |
15a73f56 TT |
421 | |
422 | re_set_exception_catchpoint (&cp->base); | |
423 | ||
424 | install_breakpoint (0, &cp->base, 1); | |
cc16e6c9 TT |
425 | discard_cleanups (cleanup); |
426 | } | |
427 | ||
428 | /* Look for an "if" token in *STRING. The "if" token must be preceded | |
429 | by whitespace. | |
430 | ||
431 | If there is any non-whitespace text between *STRING and the "if" | |
432 | token, then it is returned in a newly-xmalloc'd string. Otherwise, | |
433 | this returns NULL. | |
434 | ||
435 | STRING is updated to point to the "if" token, if it exists, or to | |
436 | the end of the string. */ | |
437 | ||
438 | static char * | |
439 | extract_exception_regexp (char **string) | |
440 | { | |
441 | char *start; | |
442 | char *last, *last_space; | |
443 | ||
444 | start = skip_spaces (*string); | |
445 | ||
446 | last = start; | |
447 | last_space = start; | |
448 | while (*last != '\0') | |
449 | { | |
450 | char *if_token = last; | |
451 | ||
452 | /* Check for the "if". */ | |
453 | if (check_for_argument (&if_token, "if", 2)) | |
454 | break; | |
455 | ||
456 | /* No "if" token here. Skip to the next word start. */ | |
457 | last_space = skip_to_space (last); | |
458 | last = skip_spaces (last_space); | |
459 | } | |
460 | ||
461 | *string = last; | |
462 | if (last_space > start) | |
463 | return savestring (start, last_space - start); | |
464 | return NULL; | |
916703c0 TT |
465 | } |
466 | ||
467 | /* Deal with "catch catch", "catch throw", and "catch rethrow" | |
468 | commands. */ | |
469 | ||
470 | static void | |
471 | catch_exception_command_1 (enum exception_event_kind ex_event, char *arg, | |
472 | int tempflag, int from_tty) | |
473 | { | |
cc16e6c9 | 474 | char *except_rx; |
916703c0 | 475 | char *cond_string = NULL; |
cc16e6c9 | 476 | struct cleanup *cleanup; |
916703c0 TT |
477 | |
478 | if (!arg) | |
479 | arg = ""; | |
480 | arg = skip_spaces (arg); | |
481 | ||
cc16e6c9 TT |
482 | except_rx = extract_exception_regexp (&arg); |
483 | cleanup = make_cleanup (xfree, except_rx); | |
484 | ||
916703c0 TT |
485 | cond_string = ep_parse_optional_if_clause (&arg); |
486 | ||
487 | if ((*arg != '\0') && !isspace (*arg)) | |
488 | error (_("Junk at end of arguments.")); | |
489 | ||
490 | if (ex_event != EX_EVENT_THROW | |
491 | && ex_event != EX_EVENT_CATCH | |
492 | && ex_event != EX_EVENT_RETHROW) | |
493 | error (_("Unsupported or unknown exception event; cannot catch it")); | |
494 | ||
cc16e6c9 TT |
495 | handle_gnu_v3_exceptions (tempflag, except_rx, cond_string, |
496 | ex_event, from_tty); | |
497 | ||
498 | discard_cleanups (cleanup); | |
916703c0 TT |
499 | } |
500 | ||
501 | /* Implementation of "catch catch" command. */ | |
502 | ||
503 | static void | |
504 | catch_catch_command (char *arg, int from_tty, struct cmd_list_element *command) | |
505 | { | |
506 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
507 | ||
508 | catch_exception_command_1 (EX_EVENT_CATCH, arg, tempflag, from_tty); | |
509 | } | |
510 | ||
511 | /* Implementation of "catch throw" command. */ | |
512 | ||
513 | static void | |
514 | catch_throw_command (char *arg, int from_tty, struct cmd_list_element *command) | |
515 | { | |
516 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
517 | ||
518 | catch_exception_command_1 (EX_EVENT_THROW, arg, tempflag, from_tty); | |
519 | } | |
520 | ||
521 | /* Implementation of "catch rethrow" command. */ | |
522 | ||
523 | static void | |
524 | catch_rethrow_command (char *arg, int from_tty, | |
525 | struct cmd_list_element *command) | |
526 | { | |
527 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
528 | ||
529 | catch_exception_command_1 (EX_EVENT_RETHROW, arg, tempflag, from_tty); | |
530 | } | |
531 | ||
532 | \f | |
533 | ||
72f1fe8a TT |
534 | /* Implement the 'make_value' method for the $_exception |
535 | internalvar. */ | |
536 | ||
537 | static struct value * | |
538 | compute_exception (struct gdbarch *argc, struct internalvar *var, void *ignore) | |
539 | { | |
72f1fe8a TT |
540 | struct value *arg0, *arg1; |
541 | struct type *obj_type; | |
542 | ||
cc16e6c9 | 543 | fetch_probe_arguments (&arg0, &arg1); |
72f1fe8a TT |
544 | |
545 | /* ARG0 is a pointer to the exception object. ARG1 is a pointer to | |
546 | the std::type_info for the exception. Now we find the type from | |
547 | the type_info and cast the result. */ | |
548 | obj_type = cplus_type_from_type_info (arg1); | |
549 | return value_ind (value_cast (make_pointer_type (obj_type, NULL), arg0)); | |
550 | } | |
551 | ||
552 | /* Implementation of the '$_exception' variable. */ | |
553 | ||
554 | static const struct internalvar_funcs exception_funcs = | |
555 | { | |
556 | compute_exception, | |
557 | NULL, | |
558 | NULL | |
559 | }; | |
560 | ||
561 | \f | |
562 | ||
916703c0 TT |
563 | static void |
564 | initialize_throw_catchpoint_ops (void) | |
565 | { | |
566 | struct breakpoint_ops *ops; | |
567 | ||
568 | initialize_breakpoint_ops (); | |
569 | ||
570 | /* GNU v3 exception catchpoints. */ | |
571 | ops = &gnu_v3_exception_catchpoint_ops; | |
572 | *ops = bkpt_breakpoint_ops; | |
cc16e6c9 | 573 | ops->dtor = dtor_exception_catchpoint; |
15a73f56 | 574 | ops->re_set = re_set_exception_catchpoint; |
916703c0 TT |
575 | ops->print_it = print_it_exception_catchpoint; |
576 | ops->print_one = print_one_exception_catchpoint; | |
577 | ops->print_mention = print_mention_exception_catchpoint; | |
578 | ops->print_recreate = print_recreate_exception_catchpoint; | |
cc16e6c9 TT |
579 | ops->print_one_detail = print_one_detail_exception_catchpoint; |
580 | ops->check_status = check_status_exception_catchpoint; | |
916703c0 TT |
581 | } |
582 | ||
583 | initialize_file_ftype _initialize_break_catch_throw; | |
584 | ||
585 | void | |
586 | _initialize_break_catch_throw (void) | |
587 | { | |
588 | initialize_throw_catchpoint_ops (); | |
589 | ||
590 | /* Add catch and tcatch sub-commands. */ | |
591 | add_catch_command ("catch", _("\ | |
592 | Catch an exception, when caught."), | |
593 | catch_catch_command, | |
594 | NULL, | |
595 | CATCH_PERMANENT, | |
596 | CATCH_TEMPORARY); | |
597 | add_catch_command ("throw", _("\ | |
598 | Catch an exception, when thrown."), | |
599 | catch_throw_command, | |
600 | NULL, | |
601 | CATCH_PERMANENT, | |
602 | CATCH_TEMPORARY); | |
603 | add_catch_command ("rethrow", _("\ | |
604 | Catch an exception, when rethrown."), | |
605 | catch_rethrow_command, | |
606 | NULL, | |
607 | CATCH_PERMANENT, | |
608 | CATCH_TEMPORARY); | |
72f1fe8a TT |
609 | |
610 | create_internalvar_type_lazy ("_exception", &exception_funcs, NULL); | |
916703c0 | 611 | } |