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916703c0 TT |
1 | /* Everything about catch/throw catchpoints, for GDB. |
2 | ||
61baf725 | 3 | Copyright (C) 1986-2017 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 | ||
c1fc2657 | 77 | struct exception_catchpoint : public breakpoint |
15a73f56 | 78 | { |
15a73f56 TT |
79 | /* The kind of exception catchpoint. */ |
80 | ||
81 | enum exception_event_kind kind; | |
cc16e6c9 | 82 | |
4fa8aeac TT |
83 | /* If not empty, a string holding the source form of the regular |
84 | expression to match against. */ | |
cc16e6c9 | 85 | |
4fa8aeac | 86 | std::string exception_rx; |
cc16e6c9 | 87 | |
2d7cc5c7 PA |
88 | /* If non-NULL, a compiled regular expression which is used to |
89 | determine which exceptions to stop on. */ | |
cc16e6c9 | 90 | |
2d7cc5c7 | 91 | std::unique_ptr<compiled_regex> pattern; |
15a73f56 TT |
92 | }; |
93 | ||
cc16e6c9 TT |
94 | \f |
95 | ||
96 | /* A helper function that fetches exception probe arguments. This | |
97 | fills in *ARG0 (if non-NULL) and *ARG1 (which must be non-NULL). | |
98 | It will throw an exception on any kind of failure. */ | |
99 | ||
100 | static void | |
101 | fetch_probe_arguments (struct value **arg0, struct value **arg1) | |
102 | { | |
103 | struct frame_info *frame = get_selected_frame (_("No frame selected")); | |
104 | CORE_ADDR pc = get_frame_pc (frame); | |
729662a5 | 105 | struct bound_probe pc_probe; |
cc16e6c9 TT |
106 | unsigned n_args; |
107 | ||
108 | pc_probe = find_probe_by_pc (pc); | |
729662a5 TT |
109 | if (pc_probe.probe == NULL |
110 | || strcmp (pc_probe.probe->provider, "libstdcxx") != 0 | |
111 | || (strcmp (pc_probe.probe->name, "catch") != 0 | |
112 | && strcmp (pc_probe.probe->name, "throw") != 0 | |
113 | && strcmp (pc_probe.probe->name, "rethrow") != 0)) | |
cc16e6c9 TT |
114 | error (_("not stopped at a C++ exception catchpoint")); |
115 | ||
729662a5 | 116 | n_args = get_probe_argument_count (pc_probe.probe, frame); |
cc16e6c9 TT |
117 | if (n_args < 2) |
118 | error (_("C++ exception catchpoint has too few arguments")); | |
119 | ||
120 | if (arg0 != NULL) | |
729662a5 TT |
121 | *arg0 = evaluate_probe_argument (pc_probe.probe, 0, frame); |
122 | *arg1 = evaluate_probe_argument (pc_probe.probe, 1, frame); | |
cc16e6c9 TT |
123 | |
124 | if ((arg0 != NULL && *arg0 == NULL) || *arg1 == NULL) | |
125 | error (_("error computing probe argument at c++ exception catchpoint")); | |
126 | } | |
127 | ||
128 | \f | |
129 | ||
916703c0 TT |
130 | /* A helper function that returns a value indicating the kind of the |
131 | exception catchpoint B. */ | |
132 | ||
133 | static enum exception_event_kind | |
134 | classify_exception_breakpoint (struct breakpoint *b) | |
135 | { | |
15a73f56 TT |
136 | struct exception_catchpoint *cp = (struct exception_catchpoint *) b; |
137 | ||
138 | return cp->kind; | |
139 | } | |
140 | ||
cc16e6c9 TT |
141 | /* Implement the 'check_status' method. */ |
142 | ||
143 | static void | |
144 | check_status_exception_catchpoint (struct bpstats *bs) | |
145 | { | |
146 | struct exception_catchpoint *self | |
147 | = (struct exception_catchpoint *) bs->breakpoint_at; | |
2f408ecb | 148 | std::string type_name; |
cc16e6c9 TT |
149 | |
150 | bkpt_breakpoint_ops.check_status (bs); | |
151 | if (bs->stop == 0) | |
152 | return; | |
153 | ||
154 | if (self->pattern == NULL) | |
155 | return; | |
156 | ||
492d29ea | 157 | TRY |
cc16e6c9 TT |
158 | { |
159 | struct value *typeinfo_arg; | |
2f408ecb | 160 | std::string canon; |
cc16e6c9 TT |
161 | |
162 | fetch_probe_arguments (NULL, &typeinfo_arg); | |
fe978cb0 | 163 | type_name = cplus_typename_from_type_info (typeinfo_arg); |
cc16e6c9 | 164 | |
2f408ecb PA |
165 | canon = cp_canonicalize_string (type_name.c_str ()); |
166 | if (!canon.empty ()) | |
167 | std::swap (type_name, canon); | |
cc16e6c9 | 168 | } |
492d29ea PA |
169 | CATCH (e, RETURN_MASK_ERROR) |
170 | { | |
171 | exception_print (gdb_stderr, e); | |
172 | } | |
173 | END_CATCH | |
cc16e6c9 | 174 | |
2f408ecb | 175 | if (!type_name.empty ()) |
7556d4a4 | 176 | { |
2d7cc5c7 | 177 | if (self->pattern->exec (type_name.c_str (), 0, NULL, 0) != 0) |
7556d4a4 | 178 | bs->stop = 0; |
7556d4a4 | 179 | } |
cc16e6c9 TT |
180 | } |
181 | ||
15a73f56 TT |
182 | /* Implement the 're_set' method. */ |
183 | ||
184 | static void | |
185 | re_set_exception_catchpoint (struct breakpoint *self) | |
186 | { | |
187 | struct symtabs_and_lines sals = {0}; | |
188 | struct symtabs_and_lines sals_end = {0}; | |
15a73f56 TT |
189 | struct cleanup *cleanup; |
190 | enum exception_event_kind kind = classify_exception_breakpoint (self); | |
c2f4122d | 191 | struct program_space *filter_pspace = current_program_space; |
15a73f56 | 192 | |
1bff71c3 | 193 | /* We first try to use the probe interface. */ |
492d29ea | 194 | TRY |
15a73f56 | 195 | { |
ffc2605c | 196 | event_location_up location |
5b56227b | 197 | = new_probe_location (exception_functions[kind].probe); |
ffc2605c | 198 | sals = parse_probes (location.get (), filter_pspace, NULL); |
1bff71c3 | 199 | } |
492d29ea | 200 | CATCH (e, RETURN_MASK_ERROR) |
1bff71c3 | 201 | { |
1bff71c3 SDJ |
202 | /* Using the probe interface failed. Let's fallback to the normal |
203 | catchpoint mode. */ | |
492d29ea | 204 | TRY |
fc4746a2 | 205 | { |
67994074 | 206 | struct explicit_location explicit_loc; |
1bff71c3 | 207 | |
67994074 KS |
208 | initialize_explicit_location (&explicit_loc); |
209 | explicit_loc.function_name | |
00e52e53 | 210 | = ASTRDUP (exception_functions[kind].function); |
ffc2605c TT |
211 | event_location_up location = new_explicit_location (&explicit_loc); |
212 | self->ops->decode_location (self, location.get (), filter_pspace, | |
213 | &sals); | |
fc4746a2 | 214 | } |
492d29ea | 215 | CATCH (ex, RETURN_MASK_ERROR) |
7556d4a4 PA |
216 | { |
217 | /* NOT_FOUND_ERROR just means the breakpoint will be | |
218 | pending, so let it through. */ | |
219 | if (ex.error != NOT_FOUND_ERROR) | |
220 | throw_exception (ex); | |
221 | } | |
492d29ea | 222 | END_CATCH |
15a73f56 | 223 | } |
492d29ea | 224 | END_CATCH |
15a73f56 TT |
225 | |
226 | cleanup = make_cleanup (xfree, sals.sals); | |
c2f4122d | 227 | update_breakpoint_locations (self, filter_pspace, sals, sals_end); |
15a73f56 | 228 | do_cleanups (cleanup); |
916703c0 TT |
229 | } |
230 | ||
231 | static enum print_stop_action | |
232 | print_it_exception_catchpoint (bpstat bs) | |
233 | { | |
234 | struct ui_out *uiout = current_uiout; | |
235 | struct breakpoint *b = bs->breakpoint_at; | |
236 | int bp_temp; | |
237 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
238 | ||
239 | annotate_catchpoint (b->number); | |
f303dbd6 | 240 | maybe_print_thread_hit_breakpoint (uiout); |
916703c0 TT |
241 | |
242 | bp_temp = b->disposition == disp_del; | |
112e8700 | 243 | uiout->text (bp_temp ? "Temporary catchpoint " |
916703c0 | 244 | : "Catchpoint "); |
112e8700 SM |
245 | if (!uiout->is_mi_like_p ()) |
246 | uiout->field_int ("bkptno", b->number); | |
247 | uiout->text ((kind == EX_EVENT_THROW ? " (exception thrown), " | |
916703c0 TT |
248 | : (kind == EX_EVENT_CATCH ? " (exception caught), " |
249 | : " (exception rethrown), "))); | |
112e8700 | 250 | if (uiout->is_mi_like_p ()) |
916703c0 | 251 | { |
112e8700 | 252 | uiout->field_string ("reason", |
916703c0 | 253 | async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); |
112e8700 SM |
254 | uiout->field_string ("disp", bpdisp_text (b->disposition)); |
255 | uiout->field_int ("bkptno", b->number); | |
916703c0 TT |
256 | } |
257 | return PRINT_SRC_AND_LOC; | |
258 | } | |
259 | ||
260 | static void | |
261 | print_one_exception_catchpoint (struct breakpoint *b, | |
262 | struct bp_location **last_loc) | |
263 | { | |
264 | struct value_print_options opts; | |
265 | struct ui_out *uiout = current_uiout; | |
266 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
267 | ||
268 | get_user_print_options (&opts); | |
269 | if (opts.addressprint) | |
270 | { | |
271 | annotate_field (4); | |
272 | if (b->loc == NULL || b->loc->shlib_disabled) | |
112e8700 | 273 | uiout->field_string ("addr", "<PENDING>"); |
916703c0 | 274 | else |
112e8700 | 275 | uiout->field_core_addr ("addr", |
916703c0 TT |
276 | b->loc->gdbarch, b->loc->address); |
277 | } | |
278 | annotate_field (5); | |
279 | if (b->loc) | |
280 | *last_loc = b->loc; | |
281 | ||
282 | switch (kind) | |
283 | { | |
284 | case EX_EVENT_THROW: | |
112e8700 SM |
285 | uiout->field_string ("what", "exception throw"); |
286 | if (uiout->is_mi_like_p ()) | |
287 | uiout->field_string ("catch-type", "throw"); | |
916703c0 TT |
288 | break; |
289 | ||
290 | case EX_EVENT_RETHROW: | |
112e8700 SM |
291 | uiout->field_string ("what", "exception rethrow"); |
292 | if (uiout->is_mi_like_p ()) | |
293 | uiout->field_string ("catch-type", "rethrow"); | |
916703c0 TT |
294 | break; |
295 | ||
296 | case EX_EVENT_CATCH: | |
112e8700 SM |
297 | uiout->field_string ("what", "exception catch"); |
298 | if (uiout->is_mi_like_p ()) | |
299 | uiout->field_string ("catch-type", "catch"); | |
916703c0 TT |
300 | break; |
301 | } | |
302 | } | |
303 | ||
cc16e6c9 TT |
304 | /* Implement the 'print_one_detail' method. */ |
305 | ||
306 | static void | |
307 | print_one_detail_exception_catchpoint (const struct breakpoint *b, | |
308 | struct ui_out *uiout) | |
309 | { | |
310 | const struct exception_catchpoint *cp | |
311 | = (const struct exception_catchpoint *) b; | |
312 | ||
4fa8aeac | 313 | if (!cp->exception_rx.empty ()) |
cc16e6c9 | 314 | { |
112e8700 | 315 | uiout->text (_("\tmatching: ")); |
4fa8aeac | 316 | uiout->field_string ("regexp", cp->exception_rx.c_str ()); |
112e8700 | 317 | uiout->text ("\n"); |
cc16e6c9 TT |
318 | } |
319 | } | |
320 | ||
916703c0 TT |
321 | static void |
322 | print_mention_exception_catchpoint (struct breakpoint *b) | |
323 | { | |
324 | struct ui_out *uiout = current_uiout; | |
325 | int bp_temp; | |
326 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
327 | ||
328 | bp_temp = b->disposition == disp_del; | |
112e8700 | 329 | uiout->text (bp_temp ? _("Temporary catchpoint ") |
916703c0 | 330 | : _("Catchpoint ")); |
112e8700 SM |
331 | uiout->field_int ("bkptno", b->number); |
332 | uiout->text ((kind == EX_EVENT_THROW ? _(" (throw)") | |
916703c0 TT |
333 | : (kind == EX_EVENT_CATCH ? _(" (catch)") |
334 | : _(" (rethrow)")))); | |
335 | } | |
336 | ||
337 | /* Implement the "print_recreate" breakpoint_ops method for throw and | |
338 | catch catchpoints. */ | |
339 | ||
340 | static void | |
341 | print_recreate_exception_catchpoint (struct breakpoint *b, | |
342 | struct ui_file *fp) | |
343 | { | |
344 | int bp_temp; | |
345 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
346 | ||
347 | bp_temp = b->disposition == disp_del; | |
348 | fprintf_unfiltered (fp, bp_temp ? "tcatch " : "catch "); | |
349 | switch (kind) | |
350 | { | |
351 | case EX_EVENT_THROW: | |
352 | fprintf_unfiltered (fp, "throw"); | |
353 | break; | |
354 | case EX_EVENT_CATCH: | |
355 | fprintf_unfiltered (fp, "catch"); | |
356 | break; | |
357 | case EX_EVENT_RETHROW: | |
358 | fprintf_unfiltered (fp, "rethrow"); | |
359 | break; | |
360 | } | |
361 | print_recreate_thread (b, fp); | |
362 | } | |
363 | ||
15a73f56 | 364 | static void |
4fa8aeac | 365 | handle_gnu_v3_exceptions (int tempflag, std::string &&except_rx, |
63160a43 | 366 | const char *cond_string, |
916703c0 TT |
367 | enum exception_event_kind ex_event, int from_tty) |
368 | { | |
2d7cc5c7 | 369 | std::unique_ptr<compiled_regex> pattern; |
cc16e6c9 | 370 | |
4fa8aeac | 371 | if (!except_rx.empty ()) |
cc16e6c9 | 372 | { |
4fa8aeac | 373 | pattern.reset (new compiled_regex (except_rx.c_str (), REG_NOSUB, |
2d7cc5c7 | 374 | _("invalid type-matching regexp"))); |
cc16e6c9 | 375 | } |
916703c0 | 376 | |
b22e99fd | 377 | std::unique_ptr<exception_catchpoint> cp (new exception_catchpoint ()); |
cc16e6c9 | 378 | |
c1fc2657 | 379 | init_catchpoint (cp.get (), get_current_arch (), tempflag, cond_string, |
15a73f56 TT |
380 | &gnu_v3_exception_catchpoint_ops); |
381 | /* We need to reset 'type' in order for code in breakpoint.c to do | |
382 | the right thing. */ | |
c1fc2657 | 383 | cp->type = bp_breakpoint; |
15a73f56 | 384 | cp->kind = ex_event; |
2f5404b3 | 385 | cp->exception_rx = std::move (except_rx); |
2d7cc5c7 | 386 | cp->pattern = std::move (pattern); |
15a73f56 | 387 | |
c1fc2657 | 388 | re_set_exception_catchpoint (cp.get ()); |
15a73f56 | 389 | |
c1fc2657 | 390 | install_breakpoint (0, cp.get (), 1); |
4d01a485 | 391 | cp.release (); |
cc16e6c9 TT |
392 | } |
393 | ||
394 | /* Look for an "if" token in *STRING. The "if" token must be preceded | |
395 | by whitespace. | |
396 | ||
397 | If there is any non-whitespace text between *STRING and the "if" | |
398 | token, then it is returned in a newly-xmalloc'd string. Otherwise, | |
399 | this returns NULL. | |
400 | ||
401 | STRING is updated to point to the "if" token, if it exists, or to | |
402 | the end of the string. */ | |
403 | ||
4fa8aeac | 404 | static std::string |
63160a43 | 405 | extract_exception_regexp (const char **string) |
cc16e6c9 | 406 | { |
63160a43 PA |
407 | const char *start; |
408 | const char *last, *last_space; | |
cc16e6c9 | 409 | |
63160a43 | 410 | start = skip_spaces_const (*string); |
cc16e6c9 TT |
411 | |
412 | last = start; | |
413 | last_space = start; | |
414 | while (*last != '\0') | |
415 | { | |
63160a43 | 416 | const char *if_token = last; |
cc16e6c9 TT |
417 | |
418 | /* Check for the "if". */ | |
419 | if (check_for_argument (&if_token, "if", 2)) | |
420 | break; | |
421 | ||
422 | /* No "if" token here. Skip to the next word start. */ | |
423 | last_space = skip_to_space (last); | |
63160a43 | 424 | last = skip_spaces_const (last_space); |
cc16e6c9 TT |
425 | } |
426 | ||
427 | *string = last; | |
428 | if (last_space > start) | |
4fa8aeac TT |
429 | return std::string (start, last_space - start); |
430 | return std::string (); | |
916703c0 TT |
431 | } |
432 | ||
433 | /* Deal with "catch catch", "catch throw", and "catch rethrow" | |
434 | commands. */ | |
435 | ||
436 | static void | |
63160a43 PA |
437 | catch_exception_command_1 (enum exception_event_kind ex_event, |
438 | char *arg_entry, | |
916703c0 TT |
439 | int tempflag, int from_tty) |
440 | { | |
63160a43 | 441 | const char *cond_string = NULL; |
63160a43 | 442 | const char *arg = arg_entry; |
916703c0 TT |
443 | |
444 | if (!arg) | |
445 | arg = ""; | |
63160a43 | 446 | arg = skip_spaces_const (arg); |
916703c0 | 447 | |
4fa8aeac | 448 | std::string except_rx = extract_exception_regexp (&arg); |
cc16e6c9 | 449 | |
916703c0 TT |
450 | cond_string = ep_parse_optional_if_clause (&arg); |
451 | ||
452 | if ((*arg != '\0') && !isspace (*arg)) | |
453 | error (_("Junk at end of arguments.")); | |
454 | ||
455 | if (ex_event != EX_EVENT_THROW | |
456 | && ex_event != EX_EVENT_CATCH | |
457 | && ex_event != EX_EVENT_RETHROW) | |
458 | error (_("Unsupported or unknown exception event; cannot catch it")); | |
459 | ||
4fa8aeac | 460 | handle_gnu_v3_exceptions (tempflag, std::move (except_rx), cond_string, |
cc16e6c9 | 461 | ex_event, from_tty); |
916703c0 TT |
462 | } |
463 | ||
464 | /* Implementation of "catch catch" command. */ | |
465 | ||
466 | static void | |
467 | catch_catch_command (char *arg, int from_tty, struct cmd_list_element *command) | |
468 | { | |
469 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
470 | ||
471 | catch_exception_command_1 (EX_EVENT_CATCH, arg, tempflag, from_tty); | |
472 | } | |
473 | ||
474 | /* Implementation of "catch throw" command. */ | |
475 | ||
476 | static void | |
477 | catch_throw_command (char *arg, int from_tty, struct cmd_list_element *command) | |
478 | { | |
479 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
480 | ||
481 | catch_exception_command_1 (EX_EVENT_THROW, arg, tempflag, from_tty); | |
482 | } | |
483 | ||
484 | /* Implementation of "catch rethrow" command. */ | |
485 | ||
486 | static void | |
487 | catch_rethrow_command (char *arg, int from_tty, | |
488 | struct cmd_list_element *command) | |
489 | { | |
490 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
491 | ||
492 | catch_exception_command_1 (EX_EVENT_RETHROW, arg, tempflag, from_tty); | |
493 | } | |
494 | ||
495 | \f | |
496 | ||
72f1fe8a TT |
497 | /* Implement the 'make_value' method for the $_exception |
498 | internalvar. */ | |
499 | ||
500 | static struct value * | |
501 | compute_exception (struct gdbarch *argc, struct internalvar *var, void *ignore) | |
502 | { | |
72f1fe8a TT |
503 | struct value *arg0, *arg1; |
504 | struct type *obj_type; | |
505 | ||
cc16e6c9 | 506 | fetch_probe_arguments (&arg0, &arg1); |
72f1fe8a TT |
507 | |
508 | /* ARG0 is a pointer to the exception object. ARG1 is a pointer to | |
509 | the std::type_info for the exception. Now we find the type from | |
510 | the type_info and cast the result. */ | |
511 | obj_type = cplus_type_from_type_info (arg1); | |
512 | return value_ind (value_cast (make_pointer_type (obj_type, NULL), arg0)); | |
513 | } | |
514 | ||
515 | /* Implementation of the '$_exception' variable. */ | |
516 | ||
517 | static const struct internalvar_funcs exception_funcs = | |
518 | { | |
519 | compute_exception, | |
520 | NULL, | |
521 | NULL | |
522 | }; | |
523 | ||
524 | \f | |
525 | ||
916703c0 TT |
526 | static void |
527 | initialize_throw_catchpoint_ops (void) | |
528 | { | |
529 | struct breakpoint_ops *ops; | |
530 | ||
531 | initialize_breakpoint_ops (); | |
532 | ||
533 | /* GNU v3 exception catchpoints. */ | |
534 | ops = &gnu_v3_exception_catchpoint_ops; | |
535 | *ops = bkpt_breakpoint_ops; | |
15a73f56 | 536 | ops->re_set = re_set_exception_catchpoint; |
916703c0 TT |
537 | ops->print_it = print_it_exception_catchpoint; |
538 | ops->print_one = print_one_exception_catchpoint; | |
539 | ops->print_mention = print_mention_exception_catchpoint; | |
540 | ops->print_recreate = print_recreate_exception_catchpoint; | |
cc16e6c9 TT |
541 | ops->print_one_detail = print_one_detail_exception_catchpoint; |
542 | ops->check_status = check_status_exception_catchpoint; | |
916703c0 TT |
543 | } |
544 | ||
545 | initialize_file_ftype _initialize_break_catch_throw; | |
546 | ||
547 | void | |
548 | _initialize_break_catch_throw (void) | |
549 | { | |
550 | initialize_throw_catchpoint_ops (); | |
551 | ||
552 | /* Add catch and tcatch sub-commands. */ | |
553 | add_catch_command ("catch", _("\ | |
554 | Catch an exception, when caught."), | |
555 | catch_catch_command, | |
556 | NULL, | |
557 | CATCH_PERMANENT, | |
558 | CATCH_TEMPORARY); | |
559 | add_catch_command ("throw", _("\ | |
560 | Catch an exception, when thrown."), | |
561 | catch_throw_command, | |
562 | NULL, | |
563 | CATCH_PERMANENT, | |
564 | CATCH_TEMPORARY); | |
565 | add_catch_command ("rethrow", _("\ | |
566 | Catch an exception, when rethrown."), | |
567 | catch_rethrow_command, | |
568 | NULL, | |
569 | CATCH_PERMANENT, | |
570 | CATCH_TEMPORARY); | |
72f1fe8a TT |
571 | |
572 | create_internalvar_type_lazy ("_exception", &exception_funcs, NULL); | |
916703c0 | 573 | } |