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60250e8b AC |
1 | /* Exception (throw catch) mechanism, for GDB, the GNU debugger. |
2 | ||
28e7fd62 | 3 | Copyright (C) 1986-2013 Free Software Foundation, Inc. |
60250e8b AC |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
60250e8b AC |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
60250e8b AC |
19 | |
20 | #include "defs.h" | |
21 | #include "exceptions.h" | |
60250e8b AC |
22 | #include "breakpoint.h" |
23 | #include "target.h" | |
24 | #include "inferior.h" | |
25 | #include "annotate.h" | |
26 | #include "ui-out.h" | |
27 | #include "gdb_assert.h" | |
0e9f083f | 28 | #include <string.h> |
e06e2353 | 29 | #include "serial.h" |
347bddb7 | 30 | #include "gdbthread.h" |
60250e8b | 31 | |
7b871fab | 32 | const struct gdb_exception exception_none = { 0, GDB_NO_ERROR, NULL }; |
c1043fc2 | 33 | |
db5f402d AC |
34 | /* Possible catcher states. */ |
35 | enum catcher_state { | |
36 | /* Initial state, a new catcher has just been created. */ | |
37 | CATCHER_CREATED, | |
38 | /* The catch code is running. */ | |
39 | CATCHER_RUNNING, | |
40 | CATCHER_RUNNING_1, | |
41 | /* The catch code threw an exception. */ | |
42 | CATCHER_ABORTING | |
43 | }; | |
44 | ||
45 | /* Possible catcher actions. */ | |
46 | enum catcher_action { | |
47 | CATCH_ITER, | |
48 | CATCH_ITER_1, | |
49 | CATCH_THROWING | |
50 | }; | |
51 | ||
52 | struct catcher | |
53 | { | |
54 | enum catcher_state state; | |
2a78bfb5 | 55 | /* Jump buffer pointing back at the exception handler. */ |
6941d02a | 56 | EXCEPTIONS_SIGJMP_BUF buf; |
8a076db9 | 57 | /* Status buffer belonging to the exception handler. */ |
71fff37b | 58 | volatile struct gdb_exception *exception; |
db5f402d AC |
59 | /* Saved/current state. */ |
60 | int mask; | |
db5f402d | 61 | struct cleanup *saved_cleanup_chain; |
db5f402d AC |
62 | /* Back link. */ |
63 | struct catcher *prev; | |
64 | }; | |
65 | ||
60250e8b | 66 | /* Where to go for throw_exception(). */ |
db5f402d AC |
67 | static struct catcher *current_catcher; |
68 | ||
ef140872 DE |
69 | /* Return length of current_catcher list. */ |
70 | ||
71 | static int | |
72 | catcher_list_size (void) | |
73 | { | |
74 | int size; | |
75 | struct catcher *catcher; | |
76 | ||
77 | for (size = 0, catcher = current_catcher; | |
78 | catcher != NULL; | |
79 | catcher = catcher->prev) | |
80 | ++size; | |
81 | ||
82 | return size; | |
83 | } | |
84 | ||
6941d02a | 85 | EXCEPTIONS_SIGJMP_BUF * |
f9679975 | 86 | exceptions_state_mc_init (volatile struct gdb_exception *exception, |
6941d02a | 87 | return_mask mask) |
db5f402d AC |
88 | { |
89 | struct catcher *new_catcher = XZALLOC (struct catcher); | |
90 | ||
2a78bfb5 AC |
91 | /* Start with no exception, save it's address. */ |
92 | exception->reason = 0; | |
7b871fab | 93 | exception->error = GDB_NO_ERROR; |
2a78bfb5 AC |
94 | exception->message = NULL; |
95 | new_catcher->exception = exception; | |
96 | ||
db5f402d AC |
97 | new_catcher->mask = mask; |
98 | ||
db5f402d | 99 | /* Prevent error/quit during FUNC from calling cleanups established |
0963b4bd | 100 | prior to here. */ |
db5f402d AC |
101 | new_catcher->saved_cleanup_chain = save_cleanups (); |
102 | ||
103 | /* Push this new catcher on the top. */ | |
104 | new_catcher->prev = current_catcher; | |
105 | current_catcher = new_catcher; | |
106 | new_catcher->state = CATCHER_CREATED; | |
107 | ||
108 | return &new_catcher->buf; | |
109 | } | |
110 | ||
111 | static void | |
112 | catcher_pop (void) | |
113 | { | |
114 | struct catcher *old_catcher = current_catcher; | |
d7f9d729 | 115 | |
db5f402d AC |
116 | current_catcher = old_catcher->prev; |
117 | ||
118 | /* Restore the cleanup chain, the error/quit messages, and the uiout | |
0963b4bd | 119 | builder, to their original states. */ |
db5f402d AC |
120 | |
121 | restore_cleanups (old_catcher->saved_cleanup_chain); | |
122 | ||
db5f402d AC |
123 | xfree (old_catcher); |
124 | } | |
125 | ||
126 | /* Catcher state machine. Returns non-zero if the m/c should be run | |
127 | again, zero if it should abort. */ | |
128 | ||
6941d02a AC |
129 | static int |
130 | exceptions_state_mc (enum catcher_action action) | |
db5f402d AC |
131 | { |
132 | switch (current_catcher->state) | |
133 | { | |
134 | case CATCHER_CREATED: | |
135 | switch (action) | |
136 | { | |
137 | case CATCH_ITER: | |
138 | /* Allow the code to run the catcher. */ | |
139 | current_catcher->state = CATCHER_RUNNING; | |
140 | return 1; | |
141 | default: | |
e2e0b3e5 | 142 | internal_error (__FILE__, __LINE__, _("bad state")); |
db5f402d AC |
143 | } |
144 | case CATCHER_RUNNING: | |
145 | switch (action) | |
146 | { | |
147 | case CATCH_ITER: | |
148 | /* No error/quit has occured. Just clean up. */ | |
149 | catcher_pop (); | |
150 | return 0; | |
151 | case CATCH_ITER_1: | |
152 | current_catcher->state = CATCHER_RUNNING_1; | |
153 | return 1; | |
154 | case CATCH_THROWING: | |
155 | current_catcher->state = CATCHER_ABORTING; | |
156 | /* See also throw_exception. */ | |
157 | return 1; | |
158 | default: | |
e2e0b3e5 | 159 | internal_error (__FILE__, __LINE__, _("bad switch")); |
db5f402d AC |
160 | } |
161 | case CATCHER_RUNNING_1: | |
162 | switch (action) | |
163 | { | |
164 | case CATCH_ITER: | |
165 | /* The did a "break" from the inner while loop. */ | |
166 | catcher_pop (); | |
167 | return 0; | |
168 | case CATCH_ITER_1: | |
169 | current_catcher->state = CATCHER_RUNNING; | |
170 | return 0; | |
171 | case CATCH_THROWING: | |
172 | current_catcher->state = CATCHER_ABORTING; | |
173 | /* See also throw_exception. */ | |
174 | return 1; | |
175 | default: | |
e2e0b3e5 | 176 | internal_error (__FILE__, __LINE__, _("bad switch")); |
db5f402d AC |
177 | } |
178 | case CATCHER_ABORTING: | |
179 | switch (action) | |
180 | { | |
181 | case CATCH_ITER: | |
182 | { | |
71fff37b | 183 | struct gdb_exception exception = *current_catcher->exception; |
d7f9d729 | 184 | |
2a78bfb5 | 185 | if (current_catcher->mask & RETURN_MASK (exception.reason)) |
db5f402d AC |
186 | { |
187 | /* Exit normally if this catcher can handle this | |
188 | exception. The caller analyses the func return | |
189 | values. */ | |
190 | catcher_pop (); | |
191 | return 0; | |
192 | } | |
193 | /* The caller didn't request that the event be caught, | |
194 | relay the event to the next containing | |
0963b4bd | 195 | catch_errors(). */ |
db5f402d | 196 | catcher_pop (); |
2a78bfb5 | 197 | throw_exception (exception); |
db5f402d AC |
198 | } |
199 | default: | |
e2e0b3e5 | 200 | internal_error (__FILE__, __LINE__, _("bad state")); |
db5f402d AC |
201 | } |
202 | default: | |
e2e0b3e5 | 203 | internal_error (__FILE__, __LINE__, _("bad switch")); |
db5f402d AC |
204 | } |
205 | } | |
60250e8b | 206 | |
6941d02a AC |
207 | int |
208 | exceptions_state_mc_action_iter (void) | |
209 | { | |
210 | return exceptions_state_mc (CATCH_ITER); | |
211 | } | |
212 | ||
213 | int | |
214 | exceptions_state_mc_action_iter_1 (void) | |
215 | { | |
216 | return exceptions_state_mc (CATCH_ITER_1); | |
217 | } | |
218 | ||
2a78bfb5 | 219 | /* Return EXCEPTION to the nearest containing catch_errors(). */ |
60250e8b | 220 | |
c25c4a8b | 221 | void |
71fff37b | 222 | throw_exception (struct gdb_exception exception) |
60250e8b | 223 | { |
522002f9 | 224 | clear_quit_flag (); |
60250e8b AC |
225 | immediate_quit = 0; |
226 | ||
6328eb38 | 227 | do_cleanups (all_cleanups ()); |
60250e8b | 228 | |
60250e8b AC |
229 | /* Jump to the containing catch_errors() call, communicating REASON |
230 | to that call via setjmp's return value. Note that REASON can't | |
0963b4bd | 231 | be zero, by definition in defs.h. */ |
6941d02a | 232 | exceptions_state_mc (CATCH_THROWING); |
2a78bfb5 | 233 | *current_catcher->exception = exception; |
6941d02a | 234 | EXCEPTIONS_SIGLONGJMP (current_catcher->buf, exception.reason); |
2a78bfb5 AC |
235 | } |
236 | ||
6b1b7650 | 237 | static void |
c6da7a6d | 238 | print_flush (void) |
6b1b7650 | 239 | { |
e06e2353 AC |
240 | struct serial *gdb_stdout_serial; |
241 | ||
c6da7a6d AC |
242 | if (deprecated_error_begin_hook) |
243 | deprecated_error_begin_hook (); | |
244 | target_terminal_ours (); | |
e06e2353 AC |
245 | |
246 | /* We want all output to appear now, before we print the error. We | |
247 | have 3 levels of buffering we have to flush (it's possible that | |
248 | some of these should be changed to flush the lower-level ones | |
249 | too): */ | |
250 | ||
251 | /* 1. The _filtered buffer. */ | |
252 | wrap_here (""); | |
253 | ||
254 | /* 2. The stdio buffer. */ | |
c6da7a6d | 255 | gdb_flush (gdb_stdout); |
e06e2353 AC |
256 | gdb_flush (gdb_stderr); |
257 | ||
258 | /* 3. The system-level buffer. */ | |
259 | gdb_stdout_serial = serial_fdopen (1); | |
cade9e54 PB |
260 | if (gdb_stdout_serial) |
261 | { | |
262 | serial_drain_output (gdb_stdout_serial); | |
263 | serial_un_fdopen (gdb_stdout_serial); | |
264 | } | |
e06e2353 | 265 | |
c6da7a6d | 266 | annotate_error_begin (); |
6b1b7650 AC |
267 | } |
268 | ||
9cbc821d | 269 | static void |
71fff37b | 270 | print_exception (struct ui_file *file, struct gdb_exception e) |
9cbc821d AC |
271 | { |
272 | /* KLUGE: cagney/2005-01-13: Write the string out one line at a time | |
273 | as that way the MI's behavior is preserved. */ | |
274 | const char *start; | |
275 | const char *end; | |
d7f9d729 | 276 | |
9cbc821d AC |
277 | for (start = e.message; start != NULL; start = end) |
278 | { | |
279 | end = strchr (start, '\n'); | |
280 | if (end == NULL) | |
281 | fputs_filtered (start, file); | |
282 | else | |
283 | { | |
284 | end++; | |
285 | ui_file_write (file, start, end - start); | |
286 | } | |
287 | } | |
c6da7a6d | 288 | fprintf_filtered (file, "\n"); |
e48f5bee AC |
289 | |
290 | /* Now append the annotation. */ | |
291 | switch (e.reason) | |
292 | { | |
293 | case RETURN_QUIT: | |
294 | annotate_quit (); | |
295 | break; | |
296 | case RETURN_ERROR: | |
297 | /* Assume that these are all errors. */ | |
298 | annotate_error (); | |
299 | break; | |
300 | default: | |
301 | internal_error (__FILE__, __LINE__, _("Bad switch.")); | |
302 | } | |
9cbc821d AC |
303 | } |
304 | ||
8a076db9 | 305 | void |
71fff37b | 306 | exception_print (struct ui_file *file, struct gdb_exception e) |
8a076db9 AC |
307 | { |
308 | if (e.reason < 0 && e.message != NULL) | |
309 | { | |
c6da7a6d | 310 | print_flush (); |
9cbc821d | 311 | print_exception (file, e); |
9cbc821d AC |
312 | } |
313 | } | |
8a076db9 | 314 | |
9cbc821d | 315 | void |
71fff37b | 316 | exception_fprintf (struct ui_file *file, struct gdb_exception e, |
9cbc821d AC |
317 | const char *prefix, ...) |
318 | { | |
319 | if (e.reason < 0 && e.message != NULL) | |
320 | { | |
321 | va_list args; | |
c6da7a6d AC |
322 | |
323 | print_flush (); | |
9cbc821d AC |
324 | |
325 | /* Print the prefix. */ | |
326 | va_start (args, prefix); | |
327 | vfprintf_filtered (file, prefix, args); | |
328 | va_end (args); | |
329 | ||
330 | print_exception (file, e); | |
8a076db9 AC |
331 | } |
332 | } | |
333 | ||
2c0b251b | 334 | static void |
e48f5bee | 335 | print_any_exception (struct ui_file *file, const char *prefix, |
71fff37b | 336 | struct gdb_exception e) |
e48f5bee AC |
337 | { |
338 | if (e.reason < 0 && e.message != NULL) | |
339 | { | |
340 | target_terminal_ours (); | |
0963b4bd | 341 | wrap_here (""); /* Force out any buffered output. */ |
e48f5bee AC |
342 | gdb_flush (gdb_stdout); |
343 | annotate_error_begin (); | |
344 | ||
345 | /* Print the prefix. */ | |
346 | if (prefix != NULL && prefix[0] != '\0') | |
347 | fputs_filtered (prefix, file); | |
348 | print_exception (file, e); | |
349 | } | |
350 | } | |
351 | ||
ef140872 DE |
352 | /* A stack of exception messages. |
353 | This is needed to handle nested calls to throw_it: we don't want to | |
354 | xfree space for a message before it's used. | |
355 | This can happen if we throw an exception during a cleanup: | |
356 | An outer TRY_CATCH may have an exception message it wants to print, | |
357 | but while doing cleanups further calls to throw_it are made. | |
358 | ||
359 | This is indexed by the size of the current_catcher list. | |
360 | It is a dynamically allocated array so that we don't care how deeply | |
361 | GDB nests its TRY_CATCHs. */ | |
362 | static char **exception_messages; | |
363 | ||
364 | /* The number of currently allocated entries in exception_messages. */ | |
365 | static int exception_messages_size; | |
366 | ||
c25c4a8b | 367 | static void ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (3, 0) |
3af1e0e3 AC |
368 | throw_it (enum return_reason reason, enum errors error, const char *fmt, |
369 | va_list ap) | |
6b1b7650 | 370 | { |
71fff37b | 371 | struct gdb_exception e; |
17d92a02 | 372 | char *new_message; |
ef140872 DE |
373 | int depth = catcher_list_size (); |
374 | ||
375 | gdb_assert (depth > 0); | |
6b1b7650 | 376 | |
ef140872 | 377 | /* Note: The new message may use an old message's text. */ |
17d92a02 | 378 | new_message = xstrvprintf (fmt, ap); |
ef140872 DE |
379 | |
380 | if (depth > exception_messages_size) | |
381 | { | |
382 | int old_size = exception_messages_size; | |
383 | ||
384 | exception_messages_size = depth + 10; | |
385 | exception_messages = (char **) xrealloc (exception_messages, | |
386 | exception_messages_size | |
387 | * sizeof (char *)); | |
388 | memset (exception_messages + old_size, 0, | |
389 | (exception_messages_size - old_size) * sizeof (char *)); | |
390 | } | |
391 | ||
392 | xfree (exception_messages[depth - 1]); | |
393 | exception_messages[depth - 1] = new_message; | |
c6da7a6d AC |
394 | |
395 | /* Create the exception. */ | |
396 | e.reason = reason; | |
397 | e.error = error; | |
ef140872 | 398 | e.message = new_message; |
6b1b7650 | 399 | |
6b1b7650 | 400 | /* Throw the exception. */ |
6b1b7650 AC |
401 | throw_exception (e); |
402 | } | |
403 | ||
c25c4a8b | 404 | void |
6b1b7650 AC |
405 | throw_verror (enum errors error, const char *fmt, va_list ap) |
406 | { | |
3af1e0e3 | 407 | throw_it (RETURN_ERROR, error, fmt, ap); |
6b1b7650 AC |
408 | } |
409 | ||
c25c4a8b | 410 | void |
6b1b7650 AC |
411 | throw_vfatal (const char *fmt, va_list ap) |
412 | { | |
7b871fab | 413 | throw_it (RETURN_QUIT, GDB_NO_ERROR, fmt, ap); |
6b1b7650 AC |
414 | } |
415 | ||
c25c4a8b | 416 | void |
05ff989b | 417 | throw_error (enum errors error, const char *fmt, ...) |
6b1b7650 | 418 | { |
05ff989b | 419 | va_list args; |
d7f9d729 | 420 | |
05ff989b | 421 | va_start (args, fmt); |
3af1e0e3 | 422 | throw_it (RETURN_ERROR, error, fmt, args); |
05ff989b | 423 | va_end (args); |
6b1b7650 AC |
424 | } |
425 | ||
787274f0 DE |
426 | /* Call FUNC(UIOUT, FUNC_ARGS) but wrapped within an exception |
427 | handler. If an exception (enum return_reason) is thrown using | |
428 | throw_exception() than all cleanups installed since | |
429 | catch_exceptions() was entered are invoked, the (-ve) exception | |
430 | value is then returned by catch_exceptions. If FUNC() returns | |
431 | normally (with a positive or zero return value) then that value is | |
432 | returned by catch_exceptions(). It is an internal_error() for | |
433 | FUNC() to return a negative value. | |
434 | ||
435 | See exceptions.h for further usage details. | |
60250e8b AC |
436 | |
437 | Must not be called with immediate_quit in effect (bad things might | |
438 | happen, say we got a signal in the middle of a memcpy to quit_return). | |
439 | This is an OK restriction; with very few exceptions immediate_quit can | |
787274f0 | 440 | be replaced by judicious use of QUIT. */ |
60250e8b AC |
441 | |
442 | /* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with | |
7a9dd1b2 | 443 | error() et al. could maintain a set of flags that indicate the |
60250e8b AC |
444 | current state of each of the longjmp buffers. This would give the |
445 | longjmp code the chance to detect a longjmp botch (before it gets | |
446 | to longjmperror()). Prior to 1999-11-05 this wasn't possible as | |
447 | code also randomly used a SET_TOP_LEVEL macro that directly | |
0963b4bd | 448 | initialized the longjmp buffers. */ |
60250e8b | 449 | |
60250e8b AC |
450 | int |
451 | catch_exceptions (struct ui_out *uiout, | |
452 | catch_exceptions_ftype *func, | |
453 | void *func_args, | |
60250e8b AC |
454 | return_mask mask) |
455 | { | |
1c3c7ee7 | 456 | return catch_exceptions_with_msg (uiout, func, func_args, NULL, mask); |
60250e8b AC |
457 | } |
458 | ||
459 | int | |
f9679975 | 460 | catch_exceptions_with_msg (struct ui_out *func_uiout, |
60250e8b AC |
461 | catch_exceptions_ftype *func, |
462 | void *func_args, | |
60250e8b AC |
463 | char **gdberrmsg, |
464 | return_mask mask) | |
465 | { | |
71fff37b | 466 | volatile struct gdb_exception exception; |
2a78bfb5 | 467 | volatile int val = 0; |
f9679975 | 468 | struct ui_out *saved_uiout; |
d7f9d729 | 469 | |
f9679975 | 470 | /* Save and override the global ``struct ui_out'' builder. */ |
79a45e25 PA |
471 | saved_uiout = current_uiout; |
472 | current_uiout = func_uiout; | |
f9679975 PA |
473 | |
474 | TRY_CATCH (exception, RETURN_MASK_ALL) | |
6941d02a | 475 | { |
79a45e25 | 476 | val = (*func) (current_uiout, func_args); |
6941d02a | 477 | } |
f9679975 PA |
478 | |
479 | /* Restore the global builder. */ | |
79a45e25 | 480 | current_uiout = saved_uiout; |
f9679975 PA |
481 | |
482 | if (exception.reason < 0 && (mask & RETURN_MASK (exception.reason)) == 0) | |
483 | { | |
484 | /* The caller didn't request that the event be caught. | |
485 | Rethrow. */ | |
486 | throw_exception (exception); | |
487 | } | |
488 | ||
e48f5bee | 489 | print_any_exception (gdb_stderr, NULL, exception); |
60250e8b | 490 | gdb_assert (val >= 0); |
2a78bfb5 AC |
491 | gdb_assert (exception.reason <= 0); |
492 | if (exception.reason < 0) | |
493 | { | |
494 | /* If caller wants a copy of the low-level error message, make | |
495 | one. This is used in the case of a silent error whereby the | |
496 | caller may optionally want to issue the message. */ | |
497 | if (gdberrmsg != NULL) | |
6b1b7650 AC |
498 | { |
499 | if (exception.message != NULL) | |
500 | *gdberrmsg = xstrdup (exception.message); | |
501 | else | |
502 | *gdberrmsg = NULL; | |
503 | } | |
2a78bfb5 AC |
504 | return exception.reason; |
505 | } | |
60250e8b AC |
506 | return val; |
507 | } | |
508 | ||
787274f0 DE |
509 | /* This function is superseded by catch_exceptions(). */ |
510 | ||
60250e8b AC |
511 | int |
512 | catch_errors (catch_errors_ftype *func, void *func_args, char *errstring, | |
513 | return_mask mask) | |
514 | { | |
2a78bfb5 | 515 | volatile int val = 0; |
71fff37b | 516 | volatile struct gdb_exception exception; |
f9679975 | 517 | struct ui_out *saved_uiout; |
d7f9d729 | 518 | |
f9679975 | 519 | /* Save the global ``struct ui_out'' builder. */ |
79a45e25 | 520 | saved_uiout = current_uiout; |
f9679975 PA |
521 | |
522 | TRY_CATCH (exception, RETURN_MASK_ALL) | |
6941d02a AC |
523 | { |
524 | val = func (func_args); | |
525 | } | |
f9679975 PA |
526 | |
527 | /* Restore the global builder. */ | |
79a45e25 | 528 | current_uiout = saved_uiout; |
f9679975 PA |
529 | |
530 | if (exception.reason < 0 && (mask & RETURN_MASK (exception.reason)) == 0) | |
531 | { | |
532 | /* The caller didn't request that the event be caught. | |
533 | Rethrow. */ | |
534 | throw_exception (exception); | |
535 | } | |
536 | ||
e48f5bee | 537 | print_any_exception (gdb_stderr, errstring, exception); |
2a78bfb5 | 538 | if (exception.reason != 0) |
60250e8b AC |
539 | return 0; |
540 | return val; | |
541 | } | |
542 | ||
60250e8b | 543 | int |
97f8dd09 | 544 | catch_command_errors (catch_command_errors_ftype *command, |
60250e8b AC |
545 | char *arg, int from_tty, return_mask mask) |
546 | { | |
71fff37b | 547 | volatile struct gdb_exception e; |
d7f9d729 | 548 | |
6941d02a AC |
549 | TRY_CATCH (e, mask) |
550 | { | |
551 | command (arg, from_tty); | |
552 | } | |
5a14cc1a AC |
553 | print_any_exception (gdb_stderr, NULL, e); |
554 | if (e.reason < 0) | |
555 | return 0; | |
556 | return 1; | |
60250e8b | 557 | } |
50dd9793 PA |
558 | |
559 | int | |
560 | catch_command_errors_const (catch_command_errors_const_ftype *command, | |
561 | const char *arg, int from_tty, return_mask mask) | |
562 | { | |
563 | volatile struct gdb_exception e; | |
564 | ||
565 | TRY_CATCH (e, mask) | |
566 | { | |
567 | command (arg, from_tty); | |
568 | } | |
569 | print_any_exception (gdb_stderr, NULL, e); | |
570 | if (e.reason < 0) | |
571 | return 0; | |
572 | return 1; | |
573 | } |