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1 | /* General utility routines for GDB, the GNU debugger. | |
2 | ||
3 | Copyright (C) 1986-2015 Free Software Foundation, Inc. | |
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 "dyn-string.h" | |
22 | #include <ctype.h> | |
23 | #include "gdb_wait.h" | |
24 | #include "event-top.h" | |
25 | #include "gdbthread.h" | |
26 | #include "fnmatch.h" | |
27 | #include "gdb_bfd.h" | |
28 | #ifdef HAVE_SYS_RESOURCE_H | |
29 | #include <sys/resource.h> | |
30 | #endif /* HAVE_SYS_RESOURCE_H */ | |
31 | ||
32 | #ifdef TUI | |
33 | #include "tui/tui.h" /* For tui_get_command_dimension. */ | |
34 | #endif | |
35 | ||
36 | #ifdef __GO32__ | |
37 | #include <pc.h> | |
38 | #endif | |
39 | ||
40 | #include <signal.h> | |
41 | #include "timeval-utils.h" | |
42 | #include "gdbcmd.h" | |
43 | #include "serial.h" | |
44 | #include "bfd.h" | |
45 | #include "target.h" | |
46 | #include "gdb-demangle.h" | |
47 | #include "expression.h" | |
48 | #include "language.h" | |
49 | #include "charset.h" | |
50 | #include "annotate.h" | |
51 | #include "filenames.h" | |
52 | #include "symfile.h" | |
53 | #include "gdb_obstack.h" | |
54 | #include "gdbcore.h" | |
55 | #include "top.h" | |
56 | #include "main.h" | |
57 | #include "solist.h" | |
58 | ||
59 | #include "inferior.h" /* for signed_pointer_to_address */ | |
60 | ||
61 | #include "gdb_curses.h" | |
62 | ||
63 | #include "readline/readline.h" | |
64 | ||
65 | #include "gdb_sys_time.h" | |
66 | #include <time.h> | |
67 | ||
68 | #include "gdb_usleep.h" | |
69 | #include "interps.h" | |
70 | #include "gdb_regex.h" | |
71 | ||
72 | #if !HAVE_DECL_MALLOC | |
73 | extern PTR malloc (); /* ARI: PTR */ | |
74 | #endif | |
75 | #if !HAVE_DECL_REALLOC | |
76 | extern PTR realloc (); /* ARI: PTR */ | |
77 | #endif | |
78 | #if !HAVE_DECL_FREE | |
79 | extern void free (); | |
80 | #endif | |
81 | ||
82 | void (*deprecated_error_begin_hook) (void); | |
83 | ||
84 | /* Prototypes for local functions */ | |
85 | ||
86 | static void vfprintf_maybe_filtered (struct ui_file *, const char *, | |
87 | va_list, int) ATTRIBUTE_PRINTF (2, 0); | |
88 | ||
89 | static void fputs_maybe_filtered (const char *, struct ui_file *, int); | |
90 | ||
91 | static void prompt_for_continue (void); | |
92 | ||
93 | static void set_screen_size (void); | |
94 | static void set_width (void); | |
95 | ||
96 | /* Time spent in prompt_for_continue in the currently executing command | |
97 | waiting for user to respond. | |
98 | Initialized in make_command_stats_cleanup. | |
99 | Modified in prompt_for_continue and defaulted_query. | |
100 | Used in report_command_stats. */ | |
101 | ||
102 | static struct timeval prompt_for_continue_wait_time; | |
103 | ||
104 | /* A flag indicating whether to timestamp debugging messages. */ | |
105 | ||
106 | static int debug_timestamp = 0; | |
107 | ||
108 | /* Nonzero if we have job control. */ | |
109 | ||
110 | int job_control; | |
111 | ||
112 | /* Nonzero means quit immediately if Control-C is typed now, rather | |
113 | than waiting until QUIT is executed. Be careful in setting this; | |
114 | code which executes with immediate_quit set has to be very careful | |
115 | about being able to deal with being interrupted at any time. It is | |
116 | almost always better to use QUIT; the only exception I can think of | |
117 | is being able to quit out of a system call (using EINTR loses if | |
118 | the SIGINT happens between the previous QUIT and the system call). | |
119 | To immediately quit in the case in which a SIGINT happens between | |
120 | the previous QUIT and setting immediate_quit (desirable anytime we | |
121 | expect to block), call QUIT after setting immediate_quit. */ | |
122 | ||
123 | int immediate_quit; | |
124 | ||
125 | /* Nonzero means that strings with character values >0x7F should be printed | |
126 | as octal escapes. Zero means just print the value (e.g. it's an | |
127 | international character, and the terminal or window can cope.) */ | |
128 | ||
129 | int sevenbit_strings = 0; | |
130 | static void | |
131 | show_sevenbit_strings (struct ui_file *file, int from_tty, | |
132 | struct cmd_list_element *c, const char *value) | |
133 | { | |
134 | fprintf_filtered (file, _("Printing of 8-bit characters " | |
135 | "in strings as \\nnn is %s.\n"), | |
136 | value); | |
137 | } | |
138 | ||
139 | /* String to be printed before warning messages, if any. */ | |
140 | ||
141 | char *warning_pre_print = "\nwarning: "; | |
142 | ||
143 | int pagination_enabled = 1; | |
144 | static void | |
145 | show_pagination_enabled (struct ui_file *file, int from_tty, | |
146 | struct cmd_list_element *c, const char *value) | |
147 | { | |
148 | fprintf_filtered (file, _("State of pagination is %s.\n"), value); | |
149 | } | |
150 | ||
151 | \f | |
152 | /* Cleanup utilities. | |
153 | ||
154 | These are not defined in cleanups.c (nor declared in cleanups.h) | |
155 | because while they use the "cleanup API" they are not part of the | |
156 | "cleanup API". */ | |
157 | ||
158 | static void | |
159 | do_freeargv (void *arg) | |
160 | { | |
161 | freeargv ((char **) arg); | |
162 | } | |
163 | ||
164 | struct cleanup * | |
165 | make_cleanup_freeargv (char **arg) | |
166 | { | |
167 | return make_cleanup (do_freeargv, arg); | |
168 | } | |
169 | ||
170 | static void | |
171 | do_dyn_string_delete (void *arg) | |
172 | { | |
173 | dyn_string_delete ((dyn_string_t) arg); | |
174 | } | |
175 | ||
176 | struct cleanup * | |
177 | make_cleanup_dyn_string_delete (dyn_string_t arg) | |
178 | { | |
179 | return make_cleanup (do_dyn_string_delete, arg); | |
180 | } | |
181 | ||
182 | static void | |
183 | do_bfd_close_cleanup (void *arg) | |
184 | { | |
185 | gdb_bfd_unref (arg); | |
186 | } | |
187 | ||
188 | struct cleanup * | |
189 | make_cleanup_bfd_unref (bfd *abfd) | |
190 | { | |
191 | return make_cleanup (do_bfd_close_cleanup, abfd); | |
192 | } | |
193 | ||
194 | /* Helper function which does the work for make_cleanup_fclose. */ | |
195 | ||
196 | static void | |
197 | do_fclose_cleanup (void *arg) | |
198 | { | |
199 | FILE *file = arg; | |
200 | ||
201 | fclose (file); | |
202 | } | |
203 | ||
204 | /* Return a new cleanup that closes FILE. */ | |
205 | ||
206 | struct cleanup * | |
207 | make_cleanup_fclose (FILE *file) | |
208 | { | |
209 | return make_cleanup (do_fclose_cleanup, file); | |
210 | } | |
211 | ||
212 | /* Helper function which does the work for make_cleanup_obstack_free. */ | |
213 | ||
214 | static void | |
215 | do_obstack_free (void *arg) | |
216 | { | |
217 | struct obstack *ob = arg; | |
218 | ||
219 | obstack_free (ob, NULL); | |
220 | } | |
221 | ||
222 | /* Return a new cleanup that frees OBSTACK. */ | |
223 | ||
224 | struct cleanup * | |
225 | make_cleanup_obstack_free (struct obstack *obstack) | |
226 | { | |
227 | return make_cleanup (do_obstack_free, obstack); | |
228 | } | |
229 | ||
230 | static void | |
231 | do_ui_file_delete (void *arg) | |
232 | { | |
233 | ui_file_delete (arg); | |
234 | } | |
235 | ||
236 | struct cleanup * | |
237 | make_cleanup_ui_file_delete (struct ui_file *arg) | |
238 | { | |
239 | return make_cleanup (do_ui_file_delete, arg); | |
240 | } | |
241 | ||
242 | /* Helper function for make_cleanup_ui_out_redirect_pop. */ | |
243 | ||
244 | static void | |
245 | do_ui_out_redirect_pop (void *arg) | |
246 | { | |
247 | struct ui_out *uiout = arg; | |
248 | ||
249 | if (ui_out_redirect (uiout, NULL) < 0) | |
250 | warning (_("Cannot restore redirection of the current output protocol")); | |
251 | } | |
252 | ||
253 | /* Return a new cleanup that pops the last redirection by ui_out_redirect | |
254 | with NULL parameter. */ | |
255 | ||
256 | struct cleanup * | |
257 | make_cleanup_ui_out_redirect_pop (struct ui_out *uiout) | |
258 | { | |
259 | return make_cleanup (do_ui_out_redirect_pop, uiout); | |
260 | } | |
261 | ||
262 | static void | |
263 | do_free_section_addr_info (void *arg) | |
264 | { | |
265 | free_section_addr_info (arg); | |
266 | } | |
267 | ||
268 | struct cleanup * | |
269 | make_cleanup_free_section_addr_info (struct section_addr_info *addrs) | |
270 | { | |
271 | return make_cleanup (do_free_section_addr_info, addrs); | |
272 | } | |
273 | ||
274 | struct restore_integer_closure | |
275 | { | |
276 | int *variable; | |
277 | int value; | |
278 | }; | |
279 | ||
280 | static void | |
281 | restore_integer (void *p) | |
282 | { | |
283 | struct restore_integer_closure *closure = p; | |
284 | ||
285 | *(closure->variable) = closure->value; | |
286 | } | |
287 | ||
288 | /* Remember the current value of *VARIABLE and make it restored when | |
289 | the cleanup is run. */ | |
290 | ||
291 | struct cleanup * | |
292 | make_cleanup_restore_integer (int *variable) | |
293 | { | |
294 | struct restore_integer_closure *c = | |
295 | xmalloc (sizeof (struct restore_integer_closure)); | |
296 | ||
297 | c->variable = variable; | |
298 | c->value = *variable; | |
299 | ||
300 | return make_cleanup_dtor (restore_integer, (void *) c, xfree); | |
301 | } | |
302 | ||
303 | /* Remember the current value of *VARIABLE and make it restored when | |
304 | the cleanup is run. */ | |
305 | ||
306 | struct cleanup * | |
307 | make_cleanup_restore_uinteger (unsigned int *variable) | |
308 | { | |
309 | return make_cleanup_restore_integer ((int *) variable); | |
310 | } | |
311 | ||
312 | /* Helper for make_cleanup_unpush_target. */ | |
313 | ||
314 | static void | |
315 | do_unpush_target (void *arg) | |
316 | { | |
317 | struct target_ops *ops = arg; | |
318 | ||
319 | unpush_target (ops); | |
320 | } | |
321 | ||
322 | /* Return a new cleanup that unpushes OPS. */ | |
323 | ||
324 | struct cleanup * | |
325 | make_cleanup_unpush_target (struct target_ops *ops) | |
326 | { | |
327 | return make_cleanup (do_unpush_target, ops); | |
328 | } | |
329 | ||
330 | /* Helper for make_cleanup_htab_delete compile time checking the types. */ | |
331 | ||
332 | static void | |
333 | do_htab_delete_cleanup (void *htab_voidp) | |
334 | { | |
335 | htab_t htab = htab_voidp; | |
336 | ||
337 | htab_delete (htab); | |
338 | } | |
339 | ||
340 | /* Return a new cleanup that deletes HTAB. */ | |
341 | ||
342 | struct cleanup * | |
343 | make_cleanup_htab_delete (htab_t htab) | |
344 | { | |
345 | return make_cleanup (do_htab_delete_cleanup, htab); | |
346 | } | |
347 | ||
348 | struct restore_ui_file_closure | |
349 | { | |
350 | struct ui_file **variable; | |
351 | struct ui_file *value; | |
352 | }; | |
353 | ||
354 | static void | |
355 | do_restore_ui_file (void *p) | |
356 | { | |
357 | struct restore_ui_file_closure *closure = p; | |
358 | ||
359 | *(closure->variable) = closure->value; | |
360 | } | |
361 | ||
362 | /* Remember the current value of *VARIABLE and make it restored when | |
363 | the cleanup is run. */ | |
364 | ||
365 | struct cleanup * | |
366 | make_cleanup_restore_ui_file (struct ui_file **variable) | |
367 | { | |
368 | struct restore_ui_file_closure *c = XNEW (struct restore_ui_file_closure); | |
369 | ||
370 | c->variable = variable; | |
371 | c->value = *variable; | |
372 | ||
373 | return make_cleanup_dtor (do_restore_ui_file, (void *) c, xfree); | |
374 | } | |
375 | ||
376 | /* Helper for make_cleanup_value_free_to_mark. */ | |
377 | ||
378 | static void | |
379 | do_value_free_to_mark (void *value) | |
380 | { | |
381 | value_free_to_mark ((struct value *) value); | |
382 | } | |
383 | ||
384 | /* Free all values allocated since MARK was obtained by value_mark | |
385 | (except for those released) when the cleanup is run. */ | |
386 | ||
387 | struct cleanup * | |
388 | make_cleanup_value_free_to_mark (struct value *mark) | |
389 | { | |
390 | return make_cleanup (do_value_free_to_mark, mark); | |
391 | } | |
392 | ||
393 | /* Helper for make_cleanup_value_free. */ | |
394 | ||
395 | static void | |
396 | do_value_free (void *value) | |
397 | { | |
398 | value_free (value); | |
399 | } | |
400 | ||
401 | /* Free VALUE. */ | |
402 | ||
403 | struct cleanup * | |
404 | make_cleanup_value_free (struct value *value) | |
405 | { | |
406 | return make_cleanup (do_value_free, value); | |
407 | } | |
408 | ||
409 | /* Helper for make_cleanup_free_so. */ | |
410 | ||
411 | static void | |
412 | do_free_so (void *arg) | |
413 | { | |
414 | struct so_list *so = arg; | |
415 | ||
416 | free_so (so); | |
417 | } | |
418 | ||
419 | /* Make cleanup handler calling free_so for SO. */ | |
420 | ||
421 | struct cleanup * | |
422 | make_cleanup_free_so (struct so_list *so) | |
423 | { | |
424 | return make_cleanup (do_free_so, so); | |
425 | } | |
426 | ||
427 | /* Helper for make_cleanup_restore_current_language. */ | |
428 | ||
429 | static void | |
430 | do_restore_current_language (void *p) | |
431 | { | |
432 | enum language saved_lang = (enum language) (uintptr_t) p; | |
433 | ||
434 | set_language (saved_lang); | |
435 | } | |
436 | ||
437 | /* Remember the current value of CURRENT_LANGUAGE and make it restored when | |
438 | the cleanup is run. */ | |
439 | ||
440 | struct cleanup * | |
441 | make_cleanup_restore_current_language (void) | |
442 | { | |
443 | enum language saved_lang = current_language->la_language; | |
444 | ||
445 | return make_cleanup (do_restore_current_language, | |
446 | (void *) (uintptr_t) saved_lang); | |
447 | } | |
448 | ||
449 | /* Helper function for make_cleanup_clear_parser_state. */ | |
450 | ||
451 | static void | |
452 | do_clear_parser_state (void *ptr) | |
453 | { | |
454 | struct parser_state **p = (struct parser_state **) ptr; | |
455 | ||
456 | *p = NULL; | |
457 | } | |
458 | ||
459 | /* Clean (i.e., set to NULL) the parser state variable P. */ | |
460 | ||
461 | struct cleanup * | |
462 | make_cleanup_clear_parser_state (struct parser_state **p) | |
463 | { | |
464 | return make_cleanup (do_clear_parser_state, (void *) p); | |
465 | } | |
466 | ||
467 | /* This function is useful for cleanups. | |
468 | Do | |
469 | ||
470 | foo = xmalloc (...); | |
471 | old_chain = make_cleanup (free_current_contents, &foo); | |
472 | ||
473 | to arrange to free the object thus allocated. */ | |
474 | ||
475 | void | |
476 | free_current_contents (void *ptr) | |
477 | { | |
478 | void **location = ptr; | |
479 | ||
480 | if (location == NULL) | |
481 | internal_error (__FILE__, __LINE__, | |
482 | _("free_current_contents: NULL pointer")); | |
483 | if (*location != NULL) | |
484 | { | |
485 | xfree (*location); | |
486 | *location = NULL; | |
487 | } | |
488 | } | |
489 | \f | |
490 | ||
491 | ||
492 | /* Print a warning message. The first argument STRING is the warning | |
493 | message, used as an fprintf format string, the second is the | |
494 | va_list of arguments for that string. A warning is unfiltered (not | |
495 | paginated) so that the user does not need to page through each | |
496 | screen full of warnings when there are lots of them. */ | |
497 | ||
498 | void | |
499 | vwarning (const char *string, va_list args) | |
500 | { | |
501 | if (deprecated_warning_hook) | |
502 | (*deprecated_warning_hook) (string, args); | |
503 | else | |
504 | { | |
505 | if (target_supports_terminal_ours ()) | |
506 | target_terminal_ours (); | |
507 | if (filtered_printing_initialized ()) | |
508 | wrap_here (""); /* Force out any buffered output. */ | |
509 | gdb_flush (gdb_stdout); | |
510 | if (warning_pre_print) | |
511 | fputs_unfiltered (warning_pre_print, gdb_stderr); | |
512 | vfprintf_unfiltered (gdb_stderr, string, args); | |
513 | fprintf_unfiltered (gdb_stderr, "\n"); | |
514 | } | |
515 | } | |
516 | ||
517 | /* Print an error message and return to command level. | |
518 | The first argument STRING is the error message, used as a fprintf string, | |
519 | and the remaining args are passed as arguments to it. */ | |
520 | ||
521 | void | |
522 | verror (const char *string, va_list args) | |
523 | { | |
524 | throw_verror (GENERIC_ERROR, string, args); | |
525 | } | |
526 | ||
527 | void | |
528 | error_stream (struct ui_file *stream) | |
529 | { | |
530 | char *message = ui_file_xstrdup (stream, NULL); | |
531 | ||
532 | make_cleanup (xfree, message); | |
533 | error (("%s"), message); | |
534 | } | |
535 | ||
536 | /* Emit a message and abort. */ | |
537 | ||
538 | static void ATTRIBUTE_NORETURN | |
539 | abort_with_message (const char *msg) | |
540 | { | |
541 | if (gdb_stderr == NULL) | |
542 | fputs (msg, stderr); | |
543 | else | |
544 | fputs_unfiltered (msg, gdb_stderr); | |
545 | ||
546 | abort (); /* NOTE: GDB has only three calls to abort(). */ | |
547 | } | |
548 | ||
549 | /* Dump core trying to increase the core soft limit to hard limit first. */ | |
550 | ||
551 | void | |
552 | dump_core (void) | |
553 | { | |
554 | #ifdef HAVE_SETRLIMIT | |
555 | struct rlimit rlim = { RLIM_INFINITY, RLIM_INFINITY }; | |
556 | ||
557 | setrlimit (RLIMIT_CORE, &rlim); | |
558 | #endif /* HAVE_SETRLIMIT */ | |
559 | ||
560 | abort (); /* NOTE: GDB has only three calls to abort(). */ | |
561 | } | |
562 | ||
563 | /* Check whether GDB will be able to dump core using the dump_core | |
564 | function. Returns zero if GDB cannot or should not dump core. | |
565 | If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected. | |
566 | If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */ | |
567 | ||
568 | int | |
569 | can_dump_core (enum resource_limit_kind limit_kind) | |
570 | { | |
571 | #ifdef HAVE_GETRLIMIT | |
572 | struct rlimit rlim; | |
573 | ||
574 | /* Be quiet and assume we can dump if an error is returned. */ | |
575 | if (getrlimit (RLIMIT_CORE, &rlim) != 0) | |
576 | return 1; | |
577 | ||
578 | switch (limit_kind) | |
579 | { | |
580 | case LIMIT_CUR: | |
581 | if (rlim.rlim_cur == 0) | |
582 | return 0; | |
583 | ||
584 | case LIMIT_MAX: | |
585 | if (rlim.rlim_max == 0) | |
586 | return 0; | |
587 | } | |
588 | #endif /* HAVE_GETRLIMIT */ | |
589 | ||
590 | return 1; | |
591 | } | |
592 | ||
593 | /* Print a warning that we cannot dump core. */ | |
594 | ||
595 | void | |
596 | warn_cant_dump_core (const char *reason) | |
597 | { | |
598 | fprintf_unfiltered (gdb_stderr, | |
599 | _("%s\nUnable to dump core, use `ulimit -c" | |
600 | " unlimited' before executing GDB next time.\n"), | |
601 | reason); | |
602 | } | |
603 | ||
604 | /* Check whether GDB will be able to dump core using the dump_core | |
605 | function, and print a warning if we cannot. */ | |
606 | ||
607 | static int | |
608 | can_dump_core_warn (enum resource_limit_kind limit_kind, | |
609 | const char *reason) | |
610 | { | |
611 | int core_dump_allowed = can_dump_core (limit_kind); | |
612 | ||
613 | if (!core_dump_allowed) | |
614 | warn_cant_dump_core (reason); | |
615 | ||
616 | return core_dump_allowed; | |
617 | } | |
618 | ||
619 | /* Allow the user to configure the debugger behavior with respect to | |
620 | what to do when an internal problem is detected. */ | |
621 | ||
622 | const char internal_problem_ask[] = "ask"; | |
623 | const char internal_problem_yes[] = "yes"; | |
624 | const char internal_problem_no[] = "no"; | |
625 | static const char *const internal_problem_modes[] = | |
626 | { | |
627 | internal_problem_ask, | |
628 | internal_problem_yes, | |
629 | internal_problem_no, | |
630 | NULL | |
631 | }; | |
632 | ||
633 | /* Print a message reporting an internal error/warning. Ask the user | |
634 | if they want to continue, dump core, or just exit. Return | |
635 | something to indicate a quit. */ | |
636 | ||
637 | struct internal_problem | |
638 | { | |
639 | const char *name; | |
640 | int user_settable_should_quit; | |
641 | const char *should_quit; | |
642 | int user_settable_should_dump_core; | |
643 | const char *should_dump_core; | |
644 | }; | |
645 | ||
646 | /* Report a problem, internal to GDB, to the user. Once the problem | |
647 | has been reported, and assuming GDB didn't quit, the caller can | |
648 | either allow execution to resume or throw an error. */ | |
649 | ||
650 | static void ATTRIBUTE_PRINTF (4, 0) | |
651 | internal_vproblem (struct internal_problem *problem, | |
652 | const char *file, int line, const char *fmt, va_list ap) | |
653 | { | |
654 | static int dejavu; | |
655 | int quit_p; | |
656 | int dump_core_p; | |
657 | char *reason; | |
658 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); | |
659 | ||
660 | /* Don't allow infinite error/warning recursion. */ | |
661 | { | |
662 | static char msg[] = "Recursive internal problem.\n"; | |
663 | ||
664 | switch (dejavu) | |
665 | { | |
666 | case 0: | |
667 | dejavu = 1; | |
668 | break; | |
669 | case 1: | |
670 | dejavu = 2; | |
671 | abort_with_message (msg); | |
672 | default: | |
673 | dejavu = 3; | |
674 | /* Newer GLIBC versions put the warn_unused_result attribute | |
675 | on write, but this is one of those rare cases where | |
676 | ignoring the return value is correct. Casting to (void) | |
677 | does not fix this problem. This is the solution suggested | |
678 | at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */ | |
679 | if (write (STDERR_FILENO, msg, sizeof (msg)) != sizeof (msg)) | |
680 | abort (); /* NOTE: GDB has only three calls to abort(). */ | |
681 | exit (1); | |
682 | } | |
683 | } | |
684 | ||
685 | /* Create a string containing the full error/warning message. Need | |
686 | to call query with this full string, as otherwize the reason | |
687 | (error/warning) and question become separated. Format using a | |
688 | style similar to a compiler error message. Include extra detail | |
689 | so that the user knows that they are living on the edge. */ | |
690 | { | |
691 | char *msg; | |
692 | ||
693 | msg = xstrvprintf (fmt, ap); | |
694 | reason = xstrprintf ("%s:%d: %s: %s\n" | |
695 | "A problem internal to GDB has been detected,\n" | |
696 | "further debugging may prove unreliable.", | |
697 | file, line, problem->name, msg); | |
698 | xfree (msg); | |
699 | make_cleanup (xfree, reason); | |
700 | } | |
701 | ||
702 | /* Fall back to abort_with_message if gdb_stderr is not set up. */ | |
703 | if (gdb_stderr == NULL) | |
704 | { | |
705 | fputs (reason, stderr); | |
706 | abort_with_message ("\n"); | |
707 | } | |
708 | ||
709 | /* Try to get the message out and at the start of a new line. */ | |
710 | if (target_supports_terminal_ours ()) | |
711 | target_terminal_ours (); | |
712 | if (filtered_printing_initialized ()) | |
713 | begin_line (); | |
714 | ||
715 | /* Emit the message unless query will emit it below. */ | |
716 | if (problem->should_quit != internal_problem_ask | |
717 | || !confirm | |
718 | || !filtered_printing_initialized ()) | |
719 | fprintf_unfiltered (gdb_stderr, "%s\n", reason); | |
720 | ||
721 | if (problem->should_quit == internal_problem_ask) | |
722 | { | |
723 | /* Default (yes/batch case) is to quit GDB. When in batch mode | |
724 | this lessens the likelihood of GDB going into an infinite | |
725 | loop. */ | |
726 | if (!confirm || !filtered_printing_initialized ()) | |
727 | quit_p = 1; | |
728 | else | |
729 | quit_p = query (_("%s\nQuit this debugging session? "), reason); | |
730 | } | |
731 | else if (problem->should_quit == internal_problem_yes) | |
732 | quit_p = 1; | |
733 | else if (problem->should_quit == internal_problem_no) | |
734 | quit_p = 0; | |
735 | else | |
736 | internal_error (__FILE__, __LINE__, _("bad switch")); | |
737 | ||
738 | fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr); | |
739 | if (REPORT_BUGS_TO[0]) | |
740 | fprintf_unfiltered (gdb_stderr, _(" For instructions, see:\n%s."), | |
741 | REPORT_BUGS_TO); | |
742 | fputs_unfiltered ("\n\n", gdb_stderr); | |
743 | ||
744 | if (problem->should_dump_core == internal_problem_ask) | |
745 | { | |
746 | if (!can_dump_core_warn (LIMIT_MAX, reason)) | |
747 | dump_core_p = 0; | |
748 | else if (!filtered_printing_initialized ()) | |
749 | dump_core_p = 1; | |
750 | else | |
751 | { | |
752 | /* Default (yes/batch case) is to dump core. This leaves a GDB | |
753 | `dropping' so that it is easier to see that something went | |
754 | wrong in GDB. */ | |
755 | dump_core_p = query (_("%s\nCreate a core file of GDB? "), reason); | |
756 | } | |
757 | } | |
758 | else if (problem->should_dump_core == internal_problem_yes) | |
759 | dump_core_p = can_dump_core_warn (LIMIT_MAX, reason); | |
760 | else if (problem->should_dump_core == internal_problem_no) | |
761 | dump_core_p = 0; | |
762 | else | |
763 | internal_error (__FILE__, __LINE__, _("bad switch")); | |
764 | ||
765 | if (quit_p) | |
766 | { | |
767 | if (dump_core_p) | |
768 | dump_core (); | |
769 | else | |
770 | exit (1); | |
771 | } | |
772 | else | |
773 | { | |
774 | if (dump_core_p) | |
775 | { | |
776 | #ifdef HAVE_WORKING_FORK | |
777 | if (fork () == 0) | |
778 | dump_core (); | |
779 | #endif | |
780 | } | |
781 | } | |
782 | ||
783 | dejavu = 0; | |
784 | do_cleanups (cleanup); | |
785 | } | |
786 | ||
787 | static struct internal_problem internal_error_problem = { | |
788 | "internal-error", 1, internal_problem_ask, 1, internal_problem_ask | |
789 | }; | |
790 | ||
791 | void | |
792 | internal_verror (const char *file, int line, const char *fmt, va_list ap) | |
793 | { | |
794 | internal_vproblem (&internal_error_problem, file, line, fmt, ap); | |
795 | throw_quit (_("Command aborted.")); | |
796 | } | |
797 | ||
798 | static struct internal_problem internal_warning_problem = { | |
799 | "internal-warning", 1, internal_problem_ask, 1, internal_problem_ask | |
800 | }; | |
801 | ||
802 | void | |
803 | internal_vwarning (const char *file, int line, const char *fmt, va_list ap) | |
804 | { | |
805 | internal_vproblem (&internal_warning_problem, file, line, fmt, ap); | |
806 | } | |
807 | ||
808 | static struct internal_problem demangler_warning_problem = { | |
809 | "demangler-warning", 1, internal_problem_ask, 0, internal_problem_no | |
810 | }; | |
811 | ||
812 | void | |
813 | demangler_vwarning (const char *file, int line, const char *fmt, va_list ap) | |
814 | { | |
815 | internal_vproblem (&demangler_warning_problem, file, line, fmt, ap); | |
816 | } | |
817 | ||
818 | void | |
819 | demangler_warning (const char *file, int line, const char *string, ...) | |
820 | { | |
821 | va_list ap; | |
822 | ||
823 | va_start (ap, string); | |
824 | demangler_vwarning (file, line, string, ap); | |
825 | va_end (ap); | |
826 | } | |
827 | ||
828 | /* Dummy functions to keep add_prefix_cmd happy. */ | |
829 | ||
830 | static void | |
831 | set_internal_problem_cmd (char *args, int from_tty) | |
832 | { | |
833 | } | |
834 | ||
835 | static void | |
836 | show_internal_problem_cmd (char *args, int from_tty) | |
837 | { | |
838 | } | |
839 | ||
840 | /* When GDB reports an internal problem (error or warning) it gives | |
841 | the user the opportunity to quit GDB and/or create a core file of | |
842 | the current debug session. This function registers a few commands | |
843 | that make it possible to specify that GDB should always or never | |
844 | quit or create a core file, without asking. The commands look | |
845 | like: | |
846 | ||
847 | maint set PROBLEM-NAME quit ask|yes|no | |
848 | maint show PROBLEM-NAME quit | |
849 | maint set PROBLEM-NAME corefile ask|yes|no | |
850 | maint show PROBLEM-NAME corefile | |
851 | ||
852 | Where PROBLEM-NAME is currently "internal-error" or | |
853 | "internal-warning". */ | |
854 | ||
855 | static void | |
856 | add_internal_problem_command (struct internal_problem *problem) | |
857 | { | |
858 | struct cmd_list_element **set_cmd_list; | |
859 | struct cmd_list_element **show_cmd_list; | |
860 | char *set_doc; | |
861 | char *show_doc; | |
862 | ||
863 | set_cmd_list = xmalloc (sizeof (*set_cmd_list)); | |
864 | show_cmd_list = xmalloc (sizeof (*set_cmd_list)); | |
865 | *set_cmd_list = NULL; | |
866 | *show_cmd_list = NULL; | |
867 | ||
868 | set_doc = xstrprintf (_("Configure what GDB does when %s is detected."), | |
869 | problem->name); | |
870 | ||
871 | show_doc = xstrprintf (_("Show what GDB does when %s is detected."), | |
872 | problem->name); | |
873 | ||
874 | add_prefix_cmd ((char*) problem->name, | |
875 | class_maintenance, set_internal_problem_cmd, set_doc, | |
876 | set_cmd_list, | |
877 | concat ("maintenance set ", problem->name, " ", | |
878 | (char *) NULL), | |
879 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
880 | ||
881 | add_prefix_cmd ((char*) problem->name, | |
882 | class_maintenance, show_internal_problem_cmd, show_doc, | |
883 | show_cmd_list, | |
884 | concat ("maintenance show ", problem->name, " ", | |
885 | (char *) NULL), | |
886 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
887 | ||
888 | if (problem->user_settable_should_quit) | |
889 | { | |
890 | set_doc = xstrprintf (_("Set whether GDB should quit " | |
891 | "when an %s is detected"), | |
892 | problem->name); | |
893 | show_doc = xstrprintf (_("Show whether GDB will quit " | |
894 | "when an %s is detected"), | |
895 | problem->name); | |
896 | add_setshow_enum_cmd ("quit", class_maintenance, | |
897 | internal_problem_modes, | |
898 | &problem->should_quit, | |
899 | set_doc, | |
900 | show_doc, | |
901 | NULL, /* help_doc */ | |
902 | NULL, /* setfunc */ | |
903 | NULL, /* showfunc */ | |
904 | set_cmd_list, | |
905 | show_cmd_list); | |
906 | ||
907 | xfree (set_doc); | |
908 | xfree (show_doc); | |
909 | } | |
910 | ||
911 | if (problem->user_settable_should_dump_core) | |
912 | { | |
913 | set_doc = xstrprintf (_("Set whether GDB should create a core " | |
914 | "file of GDB when %s is detected"), | |
915 | problem->name); | |
916 | show_doc = xstrprintf (_("Show whether GDB will create a core " | |
917 | "file of GDB when %s is detected"), | |
918 | problem->name); | |
919 | add_setshow_enum_cmd ("corefile", class_maintenance, | |
920 | internal_problem_modes, | |
921 | &problem->should_dump_core, | |
922 | set_doc, | |
923 | show_doc, | |
924 | NULL, /* help_doc */ | |
925 | NULL, /* setfunc */ | |
926 | NULL, /* showfunc */ | |
927 | set_cmd_list, | |
928 | show_cmd_list); | |
929 | ||
930 | xfree (set_doc); | |
931 | xfree (show_doc); | |
932 | } | |
933 | } | |
934 | ||
935 | /* Return a newly allocated string, containing the PREFIX followed | |
936 | by the system error message for errno (separated by a colon). | |
937 | ||
938 | The result must be deallocated after use. */ | |
939 | ||
940 | static char * | |
941 | perror_string (const char *prefix) | |
942 | { | |
943 | char *err; | |
944 | char *combined; | |
945 | ||
946 | err = safe_strerror (errno); | |
947 | combined = (char *) xmalloc (strlen (err) + strlen (prefix) + 3); | |
948 | strcpy (combined, prefix); | |
949 | strcat (combined, ": "); | |
950 | strcat (combined, err); | |
951 | ||
952 | return combined; | |
953 | } | |
954 | ||
955 | /* Print the system error message for errno, and also mention STRING | |
956 | as the file name for which the error was encountered. Use ERRCODE | |
957 | for the thrown exception. Then return to command level. */ | |
958 | ||
959 | void | |
960 | throw_perror_with_name (enum errors errcode, const char *string) | |
961 | { | |
962 | char *combined; | |
963 | ||
964 | combined = perror_string (string); | |
965 | make_cleanup (xfree, combined); | |
966 | ||
967 | /* I understand setting these is a matter of taste. Still, some people | |
968 | may clear errno but not know about bfd_error. Doing this here is not | |
969 | unreasonable. */ | |
970 | bfd_set_error (bfd_error_no_error); | |
971 | errno = 0; | |
972 | ||
973 | throw_error (errcode, _("%s."), combined); | |
974 | } | |
975 | ||
976 | /* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */ | |
977 | ||
978 | void | |
979 | perror_with_name (const char *string) | |
980 | { | |
981 | throw_perror_with_name (GENERIC_ERROR, string); | |
982 | } | |
983 | ||
984 | /* Same as perror_with_name except that it prints a warning instead | |
985 | of throwing an error. */ | |
986 | ||
987 | void | |
988 | perror_warning_with_name (const char *string) | |
989 | { | |
990 | char *combined; | |
991 | ||
992 | combined = perror_string (string); | |
993 | warning (_("%s"), combined); | |
994 | xfree (combined); | |
995 | } | |
996 | ||
997 | /* Print the system error message for ERRCODE, and also mention STRING | |
998 | as the file name for which the error was encountered. */ | |
999 | ||
1000 | void | |
1001 | print_sys_errmsg (const char *string, int errcode) | |
1002 | { | |
1003 | char *err; | |
1004 | char *combined; | |
1005 | ||
1006 | err = safe_strerror (errcode); | |
1007 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); | |
1008 | strcpy (combined, string); | |
1009 | strcat (combined, ": "); | |
1010 | strcat (combined, err); | |
1011 | ||
1012 | /* We want anything which was printed on stdout to come out first, before | |
1013 | this message. */ | |
1014 | gdb_flush (gdb_stdout); | |
1015 | fprintf_unfiltered (gdb_stderr, "%s.\n", combined); | |
1016 | } | |
1017 | ||
1018 | /* Control C eventually causes this to be called, at a convenient time. */ | |
1019 | ||
1020 | void | |
1021 | quit (void) | |
1022 | { | |
1023 | if (sync_quit_force_run) | |
1024 | { | |
1025 | sync_quit_force_run = 0; | |
1026 | quit_force (NULL, stdin == instream); | |
1027 | } | |
1028 | ||
1029 | #ifdef __MSDOS__ | |
1030 | /* No steenking SIGINT will ever be coming our way when the | |
1031 | program is resumed. Don't lie. */ | |
1032 | throw_quit ("Quit"); | |
1033 | #else | |
1034 | if (job_control | |
1035 | /* If there is no terminal switching for this target, then we can't | |
1036 | possibly get screwed by the lack of job control. */ | |
1037 | || !target_supports_terminal_ours ()) | |
1038 | throw_quit ("Quit"); | |
1039 | else | |
1040 | throw_quit ("Quit (expect signal SIGINT when the program is resumed)"); | |
1041 | #endif | |
1042 | } | |
1043 | ||
1044 | \f | |
1045 | /* Called when a memory allocation fails, with the number of bytes of | |
1046 | memory requested in SIZE. */ | |
1047 | ||
1048 | void | |
1049 | malloc_failure (long size) | |
1050 | { | |
1051 | if (size > 0) | |
1052 | { | |
1053 | internal_error (__FILE__, __LINE__, | |
1054 | _("virtual memory exhausted: can't allocate %ld bytes."), | |
1055 | size); | |
1056 | } | |
1057 | else | |
1058 | { | |
1059 | internal_error (__FILE__, __LINE__, _("virtual memory exhausted.")); | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | /* My replacement for the read system call. | |
1064 | Used like `read' but keeps going if `read' returns too soon. */ | |
1065 | ||
1066 | int | |
1067 | myread (int desc, char *addr, int len) | |
1068 | { | |
1069 | int val; | |
1070 | int orglen = len; | |
1071 | ||
1072 | while (len > 0) | |
1073 | { | |
1074 | val = read (desc, addr, len); | |
1075 | if (val < 0) | |
1076 | return val; | |
1077 | if (val == 0) | |
1078 | return orglen - len; | |
1079 | len -= val; | |
1080 | addr += val; | |
1081 | } | |
1082 | return orglen; | |
1083 | } | |
1084 | ||
1085 | void | |
1086 | print_spaces (int n, struct ui_file *file) | |
1087 | { | |
1088 | fputs_unfiltered (n_spaces (n), file); | |
1089 | } | |
1090 | ||
1091 | /* Print a host address. */ | |
1092 | ||
1093 | void | |
1094 | gdb_print_host_address (const void *addr, struct ui_file *stream) | |
1095 | { | |
1096 | fprintf_filtered (stream, "%s", host_address_to_string (addr)); | |
1097 | } | |
1098 | ||
1099 | /* See utils.h. */ | |
1100 | ||
1101 | char * | |
1102 | make_hex_string (const gdb_byte *data, size_t length) | |
1103 | { | |
1104 | char *result = xmalloc (length * 2 + 1); | |
1105 | char *p; | |
1106 | size_t i; | |
1107 | ||
1108 | p = result; | |
1109 | for (i = 0; i < length; ++i) | |
1110 | p += xsnprintf (p, 3, "%02x", data[i]); | |
1111 | *p = '\0'; | |
1112 | return result; | |
1113 | } | |
1114 | ||
1115 | \f | |
1116 | ||
1117 | /* A cleanup function that calls regfree. */ | |
1118 | ||
1119 | static void | |
1120 | do_regfree_cleanup (void *r) | |
1121 | { | |
1122 | regfree (r); | |
1123 | } | |
1124 | ||
1125 | /* Create a new cleanup that frees the compiled regular expression R. */ | |
1126 | ||
1127 | struct cleanup * | |
1128 | make_regfree_cleanup (regex_t *r) | |
1129 | { | |
1130 | return make_cleanup (do_regfree_cleanup, r); | |
1131 | } | |
1132 | ||
1133 | /* Return an xmalloc'd error message resulting from a regular | |
1134 | expression compilation failure. */ | |
1135 | ||
1136 | char * | |
1137 | get_regcomp_error (int code, regex_t *rx) | |
1138 | { | |
1139 | size_t length = regerror (code, rx, NULL, 0); | |
1140 | char *result = xmalloc (length); | |
1141 | ||
1142 | regerror (code, rx, result, length); | |
1143 | return result; | |
1144 | } | |
1145 | ||
1146 | /* Compile a regexp and throw an exception on error. This returns a | |
1147 | cleanup to free the resulting pattern on success. RX must not be | |
1148 | NULL. */ | |
1149 | ||
1150 | struct cleanup * | |
1151 | compile_rx_or_error (regex_t *pattern, const char *rx, const char *message) | |
1152 | { | |
1153 | int code; | |
1154 | ||
1155 | gdb_assert (rx != NULL); | |
1156 | ||
1157 | code = regcomp (pattern, rx, REG_NOSUB); | |
1158 | if (code != 0) | |
1159 | { | |
1160 | char *err = get_regcomp_error (code, pattern); | |
1161 | ||
1162 | make_cleanup (xfree, err); | |
1163 | error (("%s: %s"), message, err); | |
1164 | } | |
1165 | ||
1166 | return make_regfree_cleanup (pattern); | |
1167 | } | |
1168 | ||
1169 | \f | |
1170 | ||
1171 | /* This function supports the query, nquery, and yquery functions. | |
1172 | Ask user a y-or-n question and return 0 if answer is no, 1 if | |
1173 | answer is yes, or default the answer to the specified default | |
1174 | (for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a | |
1175 | default answer, or '\0' for no default. | |
1176 | CTLSTR is the control string and should end in "? ". It should | |
1177 | not say how to answer, because we do that. | |
1178 | ARGS are the arguments passed along with the CTLSTR argument to | |
1179 | printf. */ | |
1180 | ||
1181 | static int ATTRIBUTE_PRINTF (1, 0) | |
1182 | defaulted_query (const char *ctlstr, const char defchar, va_list args) | |
1183 | { | |
1184 | int ans2; | |
1185 | int retval; | |
1186 | int def_value; | |
1187 | char def_answer, not_def_answer; | |
1188 | char *y_string, *n_string, *question, *prompt; | |
1189 | /* Used to add duration we waited for user to respond to | |
1190 | prompt_for_continue_wait_time. */ | |
1191 | struct timeval prompt_started, prompt_ended, prompt_delta; | |
1192 | ||
1193 | /* Set up according to which answer is the default. */ | |
1194 | if (defchar == '\0') | |
1195 | { | |
1196 | def_value = 1; | |
1197 | def_answer = 'Y'; | |
1198 | not_def_answer = 'N'; | |
1199 | y_string = "y"; | |
1200 | n_string = "n"; | |
1201 | } | |
1202 | else if (defchar == 'y') | |
1203 | { | |
1204 | def_value = 1; | |
1205 | def_answer = 'Y'; | |
1206 | not_def_answer = 'N'; | |
1207 | y_string = "[y]"; | |
1208 | n_string = "n"; | |
1209 | } | |
1210 | else | |
1211 | { | |
1212 | def_value = 0; | |
1213 | def_answer = 'N'; | |
1214 | not_def_answer = 'Y'; | |
1215 | y_string = "y"; | |
1216 | n_string = "[n]"; | |
1217 | } | |
1218 | ||
1219 | /* Automatically answer the default value if the user did not want | |
1220 | prompts or the command was issued with the server prefix. */ | |
1221 | if (!confirm || server_command) | |
1222 | return def_value; | |
1223 | ||
1224 | /* If input isn't coming from the user directly, just say what | |
1225 | question we're asking, and then answer the default automatically. This | |
1226 | way, important error messages don't get lost when talking to GDB | |
1227 | over a pipe. */ | |
1228 | if (! input_from_terminal_p ()) | |
1229 | { | |
1230 | wrap_here (""); | |
1231 | vfprintf_filtered (gdb_stdout, ctlstr, args); | |
1232 | ||
1233 | printf_filtered (_("(%s or %s) [answered %c; " | |
1234 | "input not from terminal]\n"), | |
1235 | y_string, n_string, def_answer); | |
1236 | gdb_flush (gdb_stdout); | |
1237 | ||
1238 | return def_value; | |
1239 | } | |
1240 | ||
1241 | if (deprecated_query_hook) | |
1242 | { | |
1243 | return deprecated_query_hook (ctlstr, args); | |
1244 | } | |
1245 | ||
1246 | /* Format the question outside of the loop, to avoid reusing args. */ | |
1247 | question = xstrvprintf (ctlstr, args); | |
1248 | prompt = xstrprintf (_("%s%s(%s or %s) %s"), | |
1249 | annotation_level > 1 ? "\n\032\032pre-query\n" : "", | |
1250 | question, y_string, n_string, | |
1251 | annotation_level > 1 ? "\n\032\032query\n" : ""); | |
1252 | xfree (question); | |
1253 | ||
1254 | /* Used for calculating time spend waiting for user. */ | |
1255 | gettimeofday (&prompt_started, NULL); | |
1256 | ||
1257 | while (1) | |
1258 | { | |
1259 | char *response, answer; | |
1260 | ||
1261 | gdb_flush (gdb_stdout); | |
1262 | response = gdb_readline_wrapper (prompt); | |
1263 | ||
1264 | if (response == NULL) /* C-d */ | |
1265 | { | |
1266 | printf_filtered ("EOF [assumed %c]\n", def_answer); | |
1267 | retval = def_value; | |
1268 | break; | |
1269 | } | |
1270 | ||
1271 | answer = response[0]; | |
1272 | xfree (response); | |
1273 | ||
1274 | if (answer >= 'a') | |
1275 | answer -= 040; | |
1276 | /* Check answer. For the non-default, the user must specify | |
1277 | the non-default explicitly. */ | |
1278 | if (answer == not_def_answer) | |
1279 | { | |
1280 | retval = !def_value; | |
1281 | break; | |
1282 | } | |
1283 | /* Otherwise, if a default was specified, the user may either | |
1284 | specify the required input or have it default by entering | |
1285 | nothing. */ | |
1286 | if (answer == def_answer | |
1287 | || (defchar != '\0' && answer == '\0')) | |
1288 | { | |
1289 | retval = def_value; | |
1290 | break; | |
1291 | } | |
1292 | /* Invalid entries are not defaulted and require another selection. */ | |
1293 | printf_filtered (_("Please answer %s or %s.\n"), | |
1294 | y_string, n_string); | |
1295 | } | |
1296 | ||
1297 | /* Add time spend in this routine to prompt_for_continue_wait_time. */ | |
1298 | gettimeofday (&prompt_ended, NULL); | |
1299 | timeval_sub (&prompt_delta, &prompt_ended, &prompt_started); | |
1300 | timeval_add (&prompt_for_continue_wait_time, | |
1301 | &prompt_for_continue_wait_time, &prompt_delta); | |
1302 | ||
1303 | xfree (prompt); | |
1304 | if (annotation_level > 1) | |
1305 | printf_filtered (("\n\032\032post-query\n")); | |
1306 | return retval; | |
1307 | } | |
1308 | \f | |
1309 | ||
1310 | /* Ask user a y-or-n question and return 0 if answer is no, 1 if | |
1311 | answer is yes, or 0 if answer is defaulted. | |
1312 | Takes three args which are given to printf to print the question. | |
1313 | The first, a control string, should end in "? ". | |
1314 | It should not say how to answer, because we do that. */ | |
1315 | ||
1316 | int | |
1317 | nquery (const char *ctlstr, ...) | |
1318 | { | |
1319 | va_list args; | |
1320 | int ret; | |
1321 | ||
1322 | va_start (args, ctlstr); | |
1323 | ret = defaulted_query (ctlstr, 'n', args); | |
1324 | va_end (args); | |
1325 | return ret; | |
1326 | } | |
1327 | ||
1328 | /* Ask user a y-or-n question and return 0 if answer is no, 1 if | |
1329 | answer is yes, or 1 if answer is defaulted. | |
1330 | Takes three args which are given to printf to print the question. | |
1331 | The first, a control string, should end in "? ". | |
1332 | It should not say how to answer, because we do that. */ | |
1333 | ||
1334 | int | |
1335 | yquery (const char *ctlstr, ...) | |
1336 | { | |
1337 | va_list args; | |
1338 | int ret; | |
1339 | ||
1340 | va_start (args, ctlstr); | |
1341 | ret = defaulted_query (ctlstr, 'y', args); | |
1342 | va_end (args); | |
1343 | return ret; | |
1344 | } | |
1345 | ||
1346 | /* Ask user a y-or-n question and return 1 iff answer is yes. | |
1347 | Takes three args which are given to printf to print the question. | |
1348 | The first, a control string, should end in "? ". | |
1349 | It should not say how to answer, because we do that. */ | |
1350 | ||
1351 | int | |
1352 | query (const char *ctlstr, ...) | |
1353 | { | |
1354 | va_list args; | |
1355 | int ret; | |
1356 | ||
1357 | va_start (args, ctlstr); | |
1358 | ret = defaulted_query (ctlstr, '\0', args); | |
1359 | va_end (args); | |
1360 | return ret; | |
1361 | } | |
1362 | ||
1363 | /* A helper for parse_escape that converts a host character to a | |
1364 | target character. C is the host character. If conversion is | |
1365 | possible, then the target character is stored in *TARGET_C and the | |
1366 | function returns 1. Otherwise, the function returns 0. */ | |
1367 | ||
1368 | static int | |
1369 | host_char_to_target (struct gdbarch *gdbarch, int c, int *target_c) | |
1370 | { | |
1371 | struct obstack host_data; | |
1372 | char the_char = c; | |
1373 | struct cleanup *cleanups; | |
1374 | int result = 0; | |
1375 | ||
1376 | obstack_init (&host_data); | |
1377 | cleanups = make_cleanup_obstack_free (&host_data); | |
1378 | ||
1379 | convert_between_encodings (target_charset (gdbarch), host_charset (), | |
1380 | (gdb_byte *) &the_char, 1, 1, | |
1381 | &host_data, translit_none); | |
1382 | ||
1383 | if (obstack_object_size (&host_data) == 1) | |
1384 | { | |
1385 | result = 1; | |
1386 | *target_c = *(char *) obstack_base (&host_data); | |
1387 | } | |
1388 | ||
1389 | do_cleanups (cleanups); | |
1390 | return result; | |
1391 | } | |
1392 | ||
1393 | /* Parse a C escape sequence. STRING_PTR points to a variable | |
1394 | containing a pointer to the string to parse. That pointer | |
1395 | should point to the character after the \. That pointer | |
1396 | is updated past the characters we use. The value of the | |
1397 | escape sequence is returned. | |
1398 | ||
1399 | A negative value means the sequence \ newline was seen, | |
1400 | which is supposed to be equivalent to nothing at all. | |
1401 | ||
1402 | If \ is followed by a null character, we return a negative | |
1403 | value and leave the string pointer pointing at the null character. | |
1404 | ||
1405 | If \ is followed by 000, we return 0 and leave the string pointer | |
1406 | after the zeros. A value of 0 does not mean end of string. */ | |
1407 | ||
1408 | int | |
1409 | parse_escape (struct gdbarch *gdbarch, const char **string_ptr) | |
1410 | { | |
1411 | int target_char = -2; /* Initialize to avoid GCC warnings. */ | |
1412 | int c = *(*string_ptr)++; | |
1413 | ||
1414 | switch (c) | |
1415 | { | |
1416 | case '\n': | |
1417 | return -2; | |
1418 | case 0: | |
1419 | (*string_ptr)--; | |
1420 | return 0; | |
1421 | ||
1422 | case '0': | |
1423 | case '1': | |
1424 | case '2': | |
1425 | case '3': | |
1426 | case '4': | |
1427 | case '5': | |
1428 | case '6': | |
1429 | case '7': | |
1430 | { | |
1431 | int i = host_hex_value (c); | |
1432 | int count = 0; | |
1433 | while (++count < 3) | |
1434 | { | |
1435 | c = (**string_ptr); | |
1436 | if (isdigit (c) && c != '8' && c != '9') | |
1437 | { | |
1438 | (*string_ptr)++; | |
1439 | i *= 8; | |
1440 | i += host_hex_value (c); | |
1441 | } | |
1442 | else | |
1443 | { | |
1444 | break; | |
1445 | } | |
1446 | } | |
1447 | return i; | |
1448 | } | |
1449 | ||
1450 | case 'a': | |
1451 | c = '\a'; | |
1452 | break; | |
1453 | case 'b': | |
1454 | c = '\b'; | |
1455 | break; | |
1456 | case 'f': | |
1457 | c = '\f'; | |
1458 | break; | |
1459 | case 'n': | |
1460 | c = '\n'; | |
1461 | break; | |
1462 | case 'r': | |
1463 | c = '\r'; | |
1464 | break; | |
1465 | case 't': | |
1466 | c = '\t'; | |
1467 | break; | |
1468 | case 'v': | |
1469 | c = '\v'; | |
1470 | break; | |
1471 | ||
1472 | default: | |
1473 | break; | |
1474 | } | |
1475 | ||
1476 | if (!host_char_to_target (gdbarch, c, &target_char)) | |
1477 | error (_("The escape sequence `\\%c' is equivalent to plain `%c'," | |
1478 | " which has no equivalent\nin the `%s' character set."), | |
1479 | c, c, target_charset (gdbarch)); | |
1480 | return target_char; | |
1481 | } | |
1482 | \f | |
1483 | /* Print the character C on STREAM as part of the contents of a literal | |
1484 | string whose delimiter is QUOTER. Note that this routine should only | |
1485 | be call for printing things which are independent of the language | |
1486 | of the program being debugged. | |
1487 | ||
1488 | printchar will normally escape backslashes and instances of QUOTER. If | |
1489 | QUOTER is 0, printchar won't escape backslashes or any quoting character. | |
1490 | As a side effect, if you pass the backslash character as the QUOTER, | |
1491 | printchar will escape backslashes as usual, but not any other quoting | |
1492 | character. */ | |
1493 | ||
1494 | static void | |
1495 | printchar (int c, void (*do_fputs) (const char *, struct ui_file *), | |
1496 | void (*do_fprintf) (struct ui_file *, const char *, ...) | |
1497 | ATTRIBUTE_FPTR_PRINTF_2, struct ui_file *stream, int quoter) | |
1498 | { | |
1499 | c &= 0xFF; /* Avoid sign bit follies */ | |
1500 | ||
1501 | if (c < 0x20 || /* Low control chars */ | |
1502 | (c >= 0x7F && c < 0xA0) || /* DEL, High controls */ | |
1503 | (sevenbit_strings && c >= 0x80)) | |
1504 | { /* high order bit set */ | |
1505 | switch (c) | |
1506 | { | |
1507 | case '\n': | |
1508 | do_fputs ("\\n", stream); | |
1509 | break; | |
1510 | case '\b': | |
1511 | do_fputs ("\\b", stream); | |
1512 | break; | |
1513 | case '\t': | |
1514 | do_fputs ("\\t", stream); | |
1515 | break; | |
1516 | case '\f': | |
1517 | do_fputs ("\\f", stream); | |
1518 | break; | |
1519 | case '\r': | |
1520 | do_fputs ("\\r", stream); | |
1521 | break; | |
1522 | case '\033': | |
1523 | do_fputs ("\\e", stream); | |
1524 | break; | |
1525 | case '\007': | |
1526 | do_fputs ("\\a", stream); | |
1527 | break; | |
1528 | default: | |
1529 | do_fprintf (stream, "\\%.3o", (unsigned int) c); | |
1530 | break; | |
1531 | } | |
1532 | } | |
1533 | else | |
1534 | { | |
1535 | if (quoter != 0 && (c == '\\' || c == quoter)) | |
1536 | do_fputs ("\\", stream); | |
1537 | do_fprintf (stream, "%c", c); | |
1538 | } | |
1539 | } | |
1540 | ||
1541 | /* Print the character C on STREAM as part of the contents of a | |
1542 | literal string whose delimiter is QUOTER. Note that these routines | |
1543 | should only be call for printing things which are independent of | |
1544 | the language of the program being debugged. */ | |
1545 | ||
1546 | void | |
1547 | fputstr_filtered (const char *str, int quoter, struct ui_file *stream) | |
1548 | { | |
1549 | while (*str) | |
1550 | printchar (*str++, fputs_filtered, fprintf_filtered, stream, quoter); | |
1551 | } | |
1552 | ||
1553 | void | |
1554 | fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream) | |
1555 | { | |
1556 | while (*str) | |
1557 | printchar (*str++, fputs_unfiltered, fprintf_unfiltered, stream, quoter); | |
1558 | } | |
1559 | ||
1560 | void | |
1561 | fputstrn_filtered (const char *str, int n, int quoter, | |
1562 | struct ui_file *stream) | |
1563 | { | |
1564 | int i; | |
1565 | ||
1566 | for (i = 0; i < n; i++) | |
1567 | printchar (str[i], fputs_filtered, fprintf_filtered, stream, quoter); | |
1568 | } | |
1569 | ||
1570 | void | |
1571 | fputstrn_unfiltered (const char *str, int n, int quoter, | |
1572 | struct ui_file *stream) | |
1573 | { | |
1574 | int i; | |
1575 | ||
1576 | for (i = 0; i < n; i++) | |
1577 | printchar (str[i], fputs_unfiltered, fprintf_unfiltered, stream, quoter); | |
1578 | } | |
1579 | \f | |
1580 | ||
1581 | /* Number of lines per page or UINT_MAX if paging is disabled. */ | |
1582 | static unsigned int lines_per_page; | |
1583 | static void | |
1584 | show_lines_per_page (struct ui_file *file, int from_tty, | |
1585 | struct cmd_list_element *c, const char *value) | |
1586 | { | |
1587 | fprintf_filtered (file, | |
1588 | _("Number of lines gdb thinks are in a page is %s.\n"), | |
1589 | value); | |
1590 | } | |
1591 | ||
1592 | /* Number of chars per line or UINT_MAX if line folding is disabled. */ | |
1593 | static unsigned int chars_per_line; | |
1594 | static void | |
1595 | show_chars_per_line (struct ui_file *file, int from_tty, | |
1596 | struct cmd_list_element *c, const char *value) | |
1597 | { | |
1598 | fprintf_filtered (file, | |
1599 | _("Number of characters gdb thinks " | |
1600 | "are in a line is %s.\n"), | |
1601 | value); | |
1602 | } | |
1603 | ||
1604 | /* Current count of lines printed on this page, chars on this line. */ | |
1605 | static unsigned int lines_printed, chars_printed; | |
1606 | ||
1607 | /* Buffer and start column of buffered text, for doing smarter word- | |
1608 | wrapping. When someone calls wrap_here(), we start buffering output | |
1609 | that comes through fputs_filtered(). If we see a newline, we just | |
1610 | spit it out and forget about the wrap_here(). If we see another | |
1611 | wrap_here(), we spit it out and remember the newer one. If we see | |
1612 | the end of the line, we spit out a newline, the indent, and then | |
1613 | the buffered output. */ | |
1614 | ||
1615 | /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which | |
1616 | are waiting to be output (they have already been counted in chars_printed). | |
1617 | When wrap_buffer[0] is null, the buffer is empty. */ | |
1618 | static char *wrap_buffer; | |
1619 | ||
1620 | /* Pointer in wrap_buffer to the next character to fill. */ | |
1621 | static char *wrap_pointer; | |
1622 | ||
1623 | /* String to indent by if the wrap occurs. Must not be NULL if wrap_column | |
1624 | is non-zero. */ | |
1625 | static char *wrap_indent; | |
1626 | ||
1627 | /* Column number on the screen where wrap_buffer begins, or 0 if wrapping | |
1628 | is not in effect. */ | |
1629 | static int wrap_column; | |
1630 | \f | |
1631 | ||
1632 | /* Inialize the number of lines per page and chars per line. */ | |
1633 | ||
1634 | void | |
1635 | init_page_info (void) | |
1636 | { | |
1637 | if (batch_flag) | |
1638 | { | |
1639 | lines_per_page = UINT_MAX; | |
1640 | chars_per_line = UINT_MAX; | |
1641 | } | |
1642 | else | |
1643 | #if defined(TUI) | |
1644 | if (!tui_get_command_dimension (&chars_per_line, &lines_per_page)) | |
1645 | #endif | |
1646 | { | |
1647 | int rows, cols; | |
1648 | ||
1649 | #if defined(__GO32__) | |
1650 | rows = ScreenRows (); | |
1651 | cols = ScreenCols (); | |
1652 | lines_per_page = rows; | |
1653 | chars_per_line = cols; | |
1654 | #else | |
1655 | /* Make sure Readline has initialized its terminal settings. */ | |
1656 | rl_reset_terminal (NULL); | |
1657 | ||
1658 | /* Get the screen size from Readline. */ | |
1659 | rl_get_screen_size (&rows, &cols); | |
1660 | lines_per_page = rows; | |
1661 | chars_per_line = cols; | |
1662 | ||
1663 | /* Readline should have fetched the termcap entry for us. | |
1664 | Only try to use tgetnum function if rl_get_screen_size | |
1665 | did not return a useful value. */ | |
1666 | if (((rows <= 0) && (tgetnum ("li") < 0)) | |
1667 | /* Also disable paging if inside EMACS. */ | |
1668 | || getenv ("EMACS")) | |
1669 | { | |
1670 | /* The number of lines per page is not mentioned in the terminal | |
1671 | description or EMACS evironment variable is set. This probably | |
1672 | means that paging is not useful, so disable paging. */ | |
1673 | lines_per_page = UINT_MAX; | |
1674 | } | |
1675 | ||
1676 | /* If the output is not a terminal, don't paginate it. */ | |
1677 | if (!ui_file_isatty (gdb_stdout)) | |
1678 | lines_per_page = UINT_MAX; | |
1679 | #endif | |
1680 | } | |
1681 | ||
1682 | /* We handle SIGWINCH ourselves. */ | |
1683 | rl_catch_sigwinch = 0; | |
1684 | ||
1685 | set_screen_size (); | |
1686 | set_width (); | |
1687 | } | |
1688 | ||
1689 | /* Return nonzero if filtered printing is initialized. */ | |
1690 | int | |
1691 | filtered_printing_initialized (void) | |
1692 | { | |
1693 | return wrap_buffer != NULL; | |
1694 | } | |
1695 | ||
1696 | /* Helper for make_cleanup_restore_page_info. */ | |
1697 | ||
1698 | static void | |
1699 | do_restore_page_info_cleanup (void *arg) | |
1700 | { | |
1701 | set_screen_size (); | |
1702 | set_width (); | |
1703 | } | |
1704 | ||
1705 | /* Provide cleanup for restoring the terminal size. */ | |
1706 | ||
1707 | struct cleanup * | |
1708 | make_cleanup_restore_page_info (void) | |
1709 | { | |
1710 | struct cleanup *back_to; | |
1711 | ||
1712 | back_to = make_cleanup (do_restore_page_info_cleanup, NULL); | |
1713 | make_cleanup_restore_uinteger (&lines_per_page); | |
1714 | make_cleanup_restore_uinteger (&chars_per_line); | |
1715 | ||
1716 | return back_to; | |
1717 | } | |
1718 | ||
1719 | /* Temporarily set BATCH_FLAG and the associated unlimited terminal size. | |
1720 | Provide cleanup for restoring the original state. */ | |
1721 | ||
1722 | struct cleanup * | |
1723 | set_batch_flag_and_make_cleanup_restore_page_info (void) | |
1724 | { | |
1725 | struct cleanup *back_to = make_cleanup_restore_page_info (); | |
1726 | ||
1727 | make_cleanup_restore_integer (&batch_flag); | |
1728 | batch_flag = 1; | |
1729 | init_page_info (); | |
1730 | ||
1731 | return back_to; | |
1732 | } | |
1733 | ||
1734 | /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */ | |
1735 | ||
1736 | static void | |
1737 | set_screen_size (void) | |
1738 | { | |
1739 | int rows = lines_per_page; | |
1740 | int cols = chars_per_line; | |
1741 | ||
1742 | if (rows <= 0) | |
1743 | rows = INT_MAX; | |
1744 | ||
1745 | if (cols <= 0) | |
1746 | cols = INT_MAX; | |
1747 | ||
1748 | /* Update Readline's idea of the terminal size. */ | |
1749 | rl_set_screen_size (rows, cols); | |
1750 | } | |
1751 | ||
1752 | /* Reinitialize WRAP_BUFFER according to the current value of | |
1753 | CHARS_PER_LINE. */ | |
1754 | ||
1755 | static void | |
1756 | set_width (void) | |
1757 | { | |
1758 | if (chars_per_line == 0) | |
1759 | init_page_info (); | |
1760 | ||
1761 | if (!wrap_buffer) | |
1762 | { | |
1763 | wrap_buffer = (char *) xmalloc (chars_per_line + 2); | |
1764 | wrap_buffer[0] = '\0'; | |
1765 | } | |
1766 | else | |
1767 | wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2); | |
1768 | wrap_pointer = wrap_buffer; /* Start it at the beginning. */ | |
1769 | } | |
1770 | ||
1771 | static void | |
1772 | set_width_command (char *args, int from_tty, struct cmd_list_element *c) | |
1773 | { | |
1774 | set_screen_size (); | |
1775 | set_width (); | |
1776 | } | |
1777 | ||
1778 | static void | |
1779 | set_height_command (char *args, int from_tty, struct cmd_list_element *c) | |
1780 | { | |
1781 | set_screen_size (); | |
1782 | } | |
1783 | ||
1784 | /* See utils.h. */ | |
1785 | ||
1786 | void | |
1787 | set_screen_width_and_height (int width, int height) | |
1788 | { | |
1789 | lines_per_page = height; | |
1790 | chars_per_line = width; | |
1791 | ||
1792 | set_screen_size (); | |
1793 | set_width (); | |
1794 | } | |
1795 | ||
1796 | /* Wait, so the user can read what's on the screen. Prompt the user | |
1797 | to continue by pressing RETURN. */ | |
1798 | ||
1799 | static void | |
1800 | prompt_for_continue (void) | |
1801 | { | |
1802 | char *ignore; | |
1803 | char cont_prompt[120]; | |
1804 | /* Used to add duration we waited for user to respond to | |
1805 | prompt_for_continue_wait_time. */ | |
1806 | struct timeval prompt_started, prompt_ended, prompt_delta; | |
1807 | ||
1808 | gettimeofday (&prompt_started, NULL); | |
1809 | ||
1810 | if (annotation_level > 1) | |
1811 | printf_unfiltered (("\n\032\032pre-prompt-for-continue\n")); | |
1812 | ||
1813 | strcpy (cont_prompt, | |
1814 | "---Type <return> to continue, or q <return> to quit---"); | |
1815 | if (annotation_level > 1) | |
1816 | strcat (cont_prompt, "\n\032\032prompt-for-continue\n"); | |
1817 | ||
1818 | /* We must do this *before* we call gdb_readline, else it will eventually | |
1819 | call us -- thinking that we're trying to print beyond the end of the | |
1820 | screen. */ | |
1821 | reinitialize_more_filter (); | |
1822 | ||
1823 | immediate_quit++; | |
1824 | QUIT; | |
1825 | ||
1826 | /* We'll need to handle input. */ | |
1827 | target_terminal_ours (); | |
1828 | ||
1829 | /* On a real operating system, the user can quit with SIGINT. | |
1830 | But not on GO32. | |
1831 | ||
1832 | 'q' is provided on all systems so users don't have to change habits | |
1833 | from system to system, and because telling them what to do in | |
1834 | the prompt is more user-friendly than expecting them to think of | |
1835 | SIGINT. */ | |
1836 | /* Call readline, not gdb_readline, because GO32 readline handles control-C | |
1837 | whereas control-C to gdb_readline will cause the user to get dumped | |
1838 | out to DOS. */ | |
1839 | ignore = gdb_readline_wrapper (cont_prompt); | |
1840 | ||
1841 | /* Add time spend in this routine to prompt_for_continue_wait_time. */ | |
1842 | gettimeofday (&prompt_ended, NULL); | |
1843 | timeval_sub (&prompt_delta, &prompt_ended, &prompt_started); | |
1844 | timeval_add (&prompt_for_continue_wait_time, | |
1845 | &prompt_for_continue_wait_time, &prompt_delta); | |
1846 | ||
1847 | if (annotation_level > 1) | |
1848 | printf_unfiltered (("\n\032\032post-prompt-for-continue\n")); | |
1849 | ||
1850 | if (ignore) | |
1851 | { | |
1852 | char *p = ignore; | |
1853 | ||
1854 | while (*p == ' ' || *p == '\t') | |
1855 | ++p; | |
1856 | if (p[0] == 'q') | |
1857 | quit (); | |
1858 | xfree (ignore); | |
1859 | } | |
1860 | immediate_quit--; | |
1861 | ||
1862 | /* Now we have to do this again, so that GDB will know that it doesn't | |
1863 | need to save the ---Type <return>--- line at the top of the screen. */ | |
1864 | reinitialize_more_filter (); | |
1865 | ||
1866 | dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */ | |
1867 | } | |
1868 | ||
1869 | /* Initalize timer to keep track of how long we waited for the user. */ | |
1870 | ||
1871 | void | |
1872 | reset_prompt_for_continue_wait_time (void) | |
1873 | { | |
1874 | static const struct timeval zero_timeval = { 0 }; | |
1875 | ||
1876 | prompt_for_continue_wait_time = zero_timeval; | |
1877 | } | |
1878 | ||
1879 | /* Fetch the cumulative time spent in prompt_for_continue. */ | |
1880 | ||
1881 | struct timeval | |
1882 | get_prompt_for_continue_wait_time (void) | |
1883 | { | |
1884 | return prompt_for_continue_wait_time; | |
1885 | } | |
1886 | ||
1887 | /* Reinitialize filter; ie. tell it to reset to original values. */ | |
1888 | ||
1889 | void | |
1890 | reinitialize_more_filter (void) | |
1891 | { | |
1892 | lines_printed = 0; | |
1893 | chars_printed = 0; | |
1894 | } | |
1895 | ||
1896 | /* Indicate that if the next sequence of characters overflows the line, | |
1897 | a newline should be inserted here rather than when it hits the end. | |
1898 | If INDENT is non-null, it is a string to be printed to indent the | |
1899 | wrapped part on the next line. INDENT must remain accessible until | |
1900 | the next call to wrap_here() or until a newline is printed through | |
1901 | fputs_filtered(). | |
1902 | ||
1903 | If the line is already overfull, we immediately print a newline and | |
1904 | the indentation, and disable further wrapping. | |
1905 | ||
1906 | If we don't know the width of lines, but we know the page height, | |
1907 | we must not wrap words, but should still keep track of newlines | |
1908 | that were explicitly printed. | |
1909 | ||
1910 | INDENT should not contain tabs, as that will mess up the char count | |
1911 | on the next line. FIXME. | |
1912 | ||
1913 | This routine is guaranteed to force out any output which has been | |
1914 | squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be | |
1915 | used to force out output from the wrap_buffer. */ | |
1916 | ||
1917 | void | |
1918 | wrap_here (char *indent) | |
1919 | { | |
1920 | /* This should have been allocated, but be paranoid anyway. */ | |
1921 | if (!wrap_buffer) | |
1922 | internal_error (__FILE__, __LINE__, | |
1923 | _("failed internal consistency check")); | |
1924 | ||
1925 | if (wrap_buffer[0]) | |
1926 | { | |
1927 | *wrap_pointer = '\0'; | |
1928 | fputs_unfiltered (wrap_buffer, gdb_stdout); | |
1929 | } | |
1930 | wrap_pointer = wrap_buffer; | |
1931 | wrap_buffer[0] = '\0'; | |
1932 | if (chars_per_line == UINT_MAX) /* No line overflow checking. */ | |
1933 | { | |
1934 | wrap_column = 0; | |
1935 | } | |
1936 | else if (chars_printed >= chars_per_line) | |
1937 | { | |
1938 | puts_filtered ("\n"); | |
1939 | if (indent != NULL) | |
1940 | puts_filtered (indent); | |
1941 | wrap_column = 0; | |
1942 | } | |
1943 | else | |
1944 | { | |
1945 | wrap_column = chars_printed; | |
1946 | if (indent == NULL) | |
1947 | wrap_indent = ""; | |
1948 | else | |
1949 | wrap_indent = indent; | |
1950 | } | |
1951 | } | |
1952 | ||
1953 | /* Print input string to gdb_stdout, filtered, with wrap, | |
1954 | arranging strings in columns of n chars. String can be | |
1955 | right or left justified in the column. Never prints | |
1956 | trailing spaces. String should never be longer than | |
1957 | width. FIXME: this could be useful for the EXAMINE | |
1958 | command, which currently doesn't tabulate very well. */ | |
1959 | ||
1960 | void | |
1961 | puts_filtered_tabular (char *string, int width, int right) | |
1962 | { | |
1963 | int spaces = 0; | |
1964 | int stringlen; | |
1965 | char *spacebuf; | |
1966 | ||
1967 | gdb_assert (chars_per_line > 0); | |
1968 | if (chars_per_line == UINT_MAX) | |
1969 | { | |
1970 | fputs_filtered (string, gdb_stdout); | |
1971 | fputs_filtered ("\n", gdb_stdout); | |
1972 | return; | |
1973 | } | |
1974 | ||
1975 | if (((chars_printed - 1) / width + 2) * width >= chars_per_line) | |
1976 | fputs_filtered ("\n", gdb_stdout); | |
1977 | ||
1978 | if (width >= chars_per_line) | |
1979 | width = chars_per_line - 1; | |
1980 | ||
1981 | stringlen = strlen (string); | |
1982 | ||
1983 | if (chars_printed > 0) | |
1984 | spaces = width - (chars_printed - 1) % width - 1; | |
1985 | if (right) | |
1986 | spaces += width - stringlen; | |
1987 | ||
1988 | spacebuf = alloca (spaces + 1); | |
1989 | spacebuf[spaces] = '\0'; | |
1990 | while (spaces--) | |
1991 | spacebuf[spaces] = ' '; | |
1992 | ||
1993 | fputs_filtered (spacebuf, gdb_stdout); | |
1994 | fputs_filtered (string, gdb_stdout); | |
1995 | } | |
1996 | ||
1997 | ||
1998 | /* Ensure that whatever gets printed next, using the filtered output | |
1999 | commands, starts at the beginning of the line. I.e. if there is | |
2000 | any pending output for the current line, flush it and start a new | |
2001 | line. Otherwise do nothing. */ | |
2002 | ||
2003 | void | |
2004 | begin_line (void) | |
2005 | { | |
2006 | if (chars_printed > 0) | |
2007 | { | |
2008 | puts_filtered ("\n"); | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | ||
2013 | /* Like fputs but if FILTER is true, pause after every screenful. | |
2014 | ||
2015 | Regardless of FILTER can wrap at points other than the final | |
2016 | character of a line. | |
2017 | ||
2018 | Unlike fputs, fputs_maybe_filtered does not return a value. | |
2019 | It is OK for LINEBUFFER to be NULL, in which case just don't print | |
2020 | anything. | |
2021 | ||
2022 | Note that a longjmp to top level may occur in this routine (only if | |
2023 | FILTER is true) (since prompt_for_continue may do so) so this | |
2024 | routine should not be called when cleanups are not in place. */ | |
2025 | ||
2026 | static void | |
2027 | fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream, | |
2028 | int filter) | |
2029 | { | |
2030 | const char *lineptr; | |
2031 | ||
2032 | if (linebuffer == 0) | |
2033 | return; | |
2034 | ||
2035 | /* Don't do any filtering if it is disabled. */ | |
2036 | if (stream != gdb_stdout | |
2037 | || !pagination_enabled | |
2038 | || batch_flag | |
2039 | || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX) | |
2040 | || top_level_interpreter () == NULL | |
2041 | || ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ()))) | |
2042 | { | |
2043 | fputs_unfiltered (linebuffer, stream); | |
2044 | return; | |
2045 | } | |
2046 | ||
2047 | /* Go through and output each character. Show line extension | |
2048 | when this is necessary; prompt user for new page when this is | |
2049 | necessary. */ | |
2050 | ||
2051 | lineptr = linebuffer; | |
2052 | while (*lineptr) | |
2053 | { | |
2054 | /* Possible new page. */ | |
2055 | if (filter && (lines_printed >= lines_per_page - 1)) | |
2056 | prompt_for_continue (); | |
2057 | ||
2058 | while (*lineptr && *lineptr != '\n') | |
2059 | { | |
2060 | /* Print a single line. */ | |
2061 | if (*lineptr == '\t') | |
2062 | { | |
2063 | if (wrap_column) | |
2064 | *wrap_pointer++ = '\t'; | |
2065 | else | |
2066 | fputc_unfiltered ('\t', stream); | |
2067 | /* Shifting right by 3 produces the number of tab stops | |
2068 | we have already passed, and then adding one and | |
2069 | shifting left 3 advances to the next tab stop. */ | |
2070 | chars_printed = ((chars_printed >> 3) + 1) << 3; | |
2071 | lineptr++; | |
2072 | } | |
2073 | else | |
2074 | { | |
2075 | if (wrap_column) | |
2076 | *wrap_pointer++ = *lineptr; | |
2077 | else | |
2078 | fputc_unfiltered (*lineptr, stream); | |
2079 | chars_printed++; | |
2080 | lineptr++; | |
2081 | } | |
2082 | ||
2083 | if (chars_printed >= chars_per_line) | |
2084 | { | |
2085 | unsigned int save_chars = chars_printed; | |
2086 | ||
2087 | chars_printed = 0; | |
2088 | lines_printed++; | |
2089 | /* If we aren't actually wrapping, don't output newline -- | |
2090 | if chars_per_line is right, we probably just overflowed | |
2091 | anyway; if it's wrong, let us keep going. */ | |
2092 | if (wrap_column) | |
2093 | fputc_unfiltered ('\n', stream); | |
2094 | ||
2095 | /* Possible new page. */ | |
2096 | if (lines_printed >= lines_per_page - 1) | |
2097 | prompt_for_continue (); | |
2098 | ||
2099 | /* Now output indentation and wrapped string. */ | |
2100 | if (wrap_column) | |
2101 | { | |
2102 | fputs_unfiltered (wrap_indent, stream); | |
2103 | *wrap_pointer = '\0'; /* Null-terminate saved stuff, */ | |
2104 | fputs_unfiltered (wrap_buffer, stream); /* and eject it. */ | |
2105 | /* FIXME, this strlen is what prevents wrap_indent from | |
2106 | containing tabs. However, if we recurse to print it | |
2107 | and count its chars, we risk trouble if wrap_indent is | |
2108 | longer than (the user settable) chars_per_line. | |
2109 | Note also that this can set chars_printed > chars_per_line | |
2110 | if we are printing a long string. */ | |
2111 | chars_printed = strlen (wrap_indent) | |
2112 | + (save_chars - wrap_column); | |
2113 | wrap_pointer = wrap_buffer; /* Reset buffer */ | |
2114 | wrap_buffer[0] = '\0'; | |
2115 | wrap_column = 0; /* And disable fancy wrap */ | |
2116 | } | |
2117 | } | |
2118 | } | |
2119 | ||
2120 | if (*lineptr == '\n') | |
2121 | { | |
2122 | chars_printed = 0; | |
2123 | wrap_here ((char *) 0); /* Spit out chars, cancel | |
2124 | further wraps. */ | |
2125 | lines_printed++; | |
2126 | fputc_unfiltered ('\n', stream); | |
2127 | lineptr++; | |
2128 | } | |
2129 | } | |
2130 | } | |
2131 | ||
2132 | void | |
2133 | fputs_filtered (const char *linebuffer, struct ui_file *stream) | |
2134 | { | |
2135 | fputs_maybe_filtered (linebuffer, stream, 1); | |
2136 | } | |
2137 | ||
2138 | int | |
2139 | putchar_unfiltered (int c) | |
2140 | { | |
2141 | char buf = c; | |
2142 | ||
2143 | ui_file_write (gdb_stdout, &buf, 1); | |
2144 | return c; | |
2145 | } | |
2146 | ||
2147 | /* Write character C to gdb_stdout using GDB's paging mechanism and return C. | |
2148 | May return nonlocally. */ | |
2149 | ||
2150 | int | |
2151 | putchar_filtered (int c) | |
2152 | { | |
2153 | return fputc_filtered (c, gdb_stdout); | |
2154 | } | |
2155 | ||
2156 | int | |
2157 | fputc_unfiltered (int c, struct ui_file *stream) | |
2158 | { | |
2159 | char buf = c; | |
2160 | ||
2161 | ui_file_write (stream, &buf, 1); | |
2162 | return c; | |
2163 | } | |
2164 | ||
2165 | int | |
2166 | fputc_filtered (int c, struct ui_file *stream) | |
2167 | { | |
2168 | char buf[2]; | |
2169 | ||
2170 | buf[0] = c; | |
2171 | buf[1] = 0; | |
2172 | fputs_filtered (buf, stream); | |
2173 | return c; | |
2174 | } | |
2175 | ||
2176 | /* puts_debug is like fputs_unfiltered, except it prints special | |
2177 | characters in printable fashion. */ | |
2178 | ||
2179 | void | |
2180 | puts_debug (char *prefix, char *string, char *suffix) | |
2181 | { | |
2182 | int ch; | |
2183 | ||
2184 | /* Print prefix and suffix after each line. */ | |
2185 | static int new_line = 1; | |
2186 | static int return_p = 0; | |
2187 | static char *prev_prefix = ""; | |
2188 | static char *prev_suffix = ""; | |
2189 | ||
2190 | if (*string == '\n') | |
2191 | return_p = 0; | |
2192 | ||
2193 | /* If the prefix is changing, print the previous suffix, a new line, | |
2194 | and the new prefix. */ | |
2195 | if ((return_p || (strcmp (prev_prefix, prefix) != 0)) && !new_line) | |
2196 | { | |
2197 | fputs_unfiltered (prev_suffix, gdb_stdlog); | |
2198 | fputs_unfiltered ("\n", gdb_stdlog); | |
2199 | fputs_unfiltered (prefix, gdb_stdlog); | |
2200 | } | |
2201 | ||
2202 | /* Print prefix if we printed a newline during the previous call. */ | |
2203 | if (new_line) | |
2204 | { | |
2205 | new_line = 0; | |
2206 | fputs_unfiltered (prefix, gdb_stdlog); | |
2207 | } | |
2208 | ||
2209 | prev_prefix = prefix; | |
2210 | prev_suffix = suffix; | |
2211 | ||
2212 | /* Output characters in a printable format. */ | |
2213 | while ((ch = *string++) != '\0') | |
2214 | { | |
2215 | switch (ch) | |
2216 | { | |
2217 | default: | |
2218 | if (isprint (ch)) | |
2219 | fputc_unfiltered (ch, gdb_stdlog); | |
2220 | ||
2221 | else | |
2222 | fprintf_unfiltered (gdb_stdlog, "\\x%02x", ch & 0xff); | |
2223 | break; | |
2224 | ||
2225 | case '\\': | |
2226 | fputs_unfiltered ("\\\\", gdb_stdlog); | |
2227 | break; | |
2228 | case '\b': | |
2229 | fputs_unfiltered ("\\b", gdb_stdlog); | |
2230 | break; | |
2231 | case '\f': | |
2232 | fputs_unfiltered ("\\f", gdb_stdlog); | |
2233 | break; | |
2234 | case '\n': | |
2235 | new_line = 1; | |
2236 | fputs_unfiltered ("\\n", gdb_stdlog); | |
2237 | break; | |
2238 | case '\r': | |
2239 | fputs_unfiltered ("\\r", gdb_stdlog); | |
2240 | break; | |
2241 | case '\t': | |
2242 | fputs_unfiltered ("\\t", gdb_stdlog); | |
2243 | break; | |
2244 | case '\v': | |
2245 | fputs_unfiltered ("\\v", gdb_stdlog); | |
2246 | break; | |
2247 | } | |
2248 | ||
2249 | return_p = ch == '\r'; | |
2250 | } | |
2251 | ||
2252 | /* Print suffix if we printed a newline. */ | |
2253 | if (new_line) | |
2254 | { | |
2255 | fputs_unfiltered (suffix, gdb_stdlog); | |
2256 | fputs_unfiltered ("\n", gdb_stdlog); | |
2257 | } | |
2258 | } | |
2259 | ||
2260 | ||
2261 | /* Print a variable number of ARGS using format FORMAT. If this | |
2262 | information is going to put the amount written (since the last call | |
2263 | to REINITIALIZE_MORE_FILTER or the last page break) over the page size, | |
2264 | call prompt_for_continue to get the users permision to continue. | |
2265 | ||
2266 | Unlike fprintf, this function does not return a value. | |
2267 | ||
2268 | We implement three variants, vfprintf (takes a vararg list and stream), | |
2269 | fprintf (takes a stream to write on), and printf (the usual). | |
2270 | ||
2271 | Note also that a longjmp to top level may occur in this routine | |
2272 | (since prompt_for_continue may do so) so this routine should not be | |
2273 | called when cleanups are not in place. */ | |
2274 | ||
2275 | static void | |
2276 | vfprintf_maybe_filtered (struct ui_file *stream, const char *format, | |
2277 | va_list args, int filter) | |
2278 | { | |
2279 | char *linebuffer; | |
2280 | struct cleanup *old_cleanups; | |
2281 | ||
2282 | linebuffer = xstrvprintf (format, args); | |
2283 | old_cleanups = make_cleanup (xfree, linebuffer); | |
2284 | fputs_maybe_filtered (linebuffer, stream, filter); | |
2285 | do_cleanups (old_cleanups); | |
2286 | } | |
2287 | ||
2288 | ||
2289 | void | |
2290 | vfprintf_filtered (struct ui_file *stream, const char *format, va_list args) | |
2291 | { | |
2292 | vfprintf_maybe_filtered (stream, format, args, 1); | |
2293 | } | |
2294 | ||
2295 | void | |
2296 | vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args) | |
2297 | { | |
2298 | char *linebuffer; | |
2299 | struct cleanup *old_cleanups; | |
2300 | ||
2301 | linebuffer = xstrvprintf (format, args); | |
2302 | old_cleanups = make_cleanup (xfree, linebuffer); | |
2303 | if (debug_timestamp && stream == gdb_stdlog) | |
2304 | { | |
2305 | struct timeval tm; | |
2306 | char *timestamp; | |
2307 | int len, need_nl; | |
2308 | ||
2309 | gettimeofday (&tm, NULL); | |
2310 | ||
2311 | len = strlen (linebuffer); | |
2312 | need_nl = (len > 0 && linebuffer[len - 1] != '\n'); | |
2313 | ||
2314 | timestamp = xstrprintf ("%ld:%ld %s%s", | |
2315 | (long) tm.tv_sec, (long) tm.tv_usec, | |
2316 | linebuffer, | |
2317 | need_nl ? "\n": ""); | |
2318 | make_cleanup (xfree, timestamp); | |
2319 | fputs_unfiltered (timestamp, stream); | |
2320 | } | |
2321 | else | |
2322 | fputs_unfiltered (linebuffer, stream); | |
2323 | do_cleanups (old_cleanups); | |
2324 | } | |
2325 | ||
2326 | void | |
2327 | vprintf_filtered (const char *format, va_list args) | |
2328 | { | |
2329 | vfprintf_maybe_filtered (gdb_stdout, format, args, 1); | |
2330 | } | |
2331 | ||
2332 | void | |
2333 | vprintf_unfiltered (const char *format, va_list args) | |
2334 | { | |
2335 | vfprintf_unfiltered (gdb_stdout, format, args); | |
2336 | } | |
2337 | ||
2338 | void | |
2339 | fprintf_filtered (struct ui_file *stream, const char *format, ...) | |
2340 | { | |
2341 | va_list args; | |
2342 | ||
2343 | va_start (args, format); | |
2344 | vfprintf_filtered (stream, format, args); | |
2345 | va_end (args); | |
2346 | } | |
2347 | ||
2348 | void | |
2349 | fprintf_unfiltered (struct ui_file *stream, const char *format, ...) | |
2350 | { | |
2351 | va_list args; | |
2352 | ||
2353 | va_start (args, format); | |
2354 | vfprintf_unfiltered (stream, format, args); | |
2355 | va_end (args); | |
2356 | } | |
2357 | ||
2358 | /* Like fprintf_filtered, but prints its result indented. | |
2359 | Called as fprintfi_filtered (spaces, stream, format, ...); */ | |
2360 | ||
2361 | void | |
2362 | fprintfi_filtered (int spaces, struct ui_file *stream, const char *format, | |
2363 | ...) | |
2364 | { | |
2365 | va_list args; | |
2366 | ||
2367 | va_start (args, format); | |
2368 | print_spaces_filtered (spaces, stream); | |
2369 | ||
2370 | vfprintf_filtered (stream, format, args); | |
2371 | va_end (args); | |
2372 | } | |
2373 | ||
2374 | ||
2375 | void | |
2376 | printf_filtered (const char *format, ...) | |
2377 | { | |
2378 | va_list args; | |
2379 | ||
2380 | va_start (args, format); | |
2381 | vfprintf_filtered (gdb_stdout, format, args); | |
2382 | va_end (args); | |
2383 | } | |
2384 | ||
2385 | ||
2386 | void | |
2387 | printf_unfiltered (const char *format, ...) | |
2388 | { | |
2389 | va_list args; | |
2390 | ||
2391 | va_start (args, format); | |
2392 | vfprintf_unfiltered (gdb_stdout, format, args); | |
2393 | va_end (args); | |
2394 | } | |
2395 | ||
2396 | /* Like printf_filtered, but prints it's result indented. | |
2397 | Called as printfi_filtered (spaces, format, ...); */ | |
2398 | ||
2399 | void | |
2400 | printfi_filtered (int spaces, const char *format, ...) | |
2401 | { | |
2402 | va_list args; | |
2403 | ||
2404 | va_start (args, format); | |
2405 | print_spaces_filtered (spaces, gdb_stdout); | |
2406 | vfprintf_filtered (gdb_stdout, format, args); | |
2407 | va_end (args); | |
2408 | } | |
2409 | ||
2410 | /* Easy -- but watch out! | |
2411 | ||
2412 | This routine is *not* a replacement for puts()! puts() appends a newline. | |
2413 | This one doesn't, and had better not! */ | |
2414 | ||
2415 | void | |
2416 | puts_filtered (const char *string) | |
2417 | { | |
2418 | fputs_filtered (string, gdb_stdout); | |
2419 | } | |
2420 | ||
2421 | void | |
2422 | puts_unfiltered (const char *string) | |
2423 | { | |
2424 | fputs_unfiltered (string, gdb_stdout); | |
2425 | } | |
2426 | ||
2427 | /* Return a pointer to N spaces and a null. The pointer is good | |
2428 | until the next call to here. */ | |
2429 | char * | |
2430 | n_spaces (int n) | |
2431 | { | |
2432 | char *t; | |
2433 | static char *spaces = 0; | |
2434 | static int max_spaces = -1; | |
2435 | ||
2436 | if (n > max_spaces) | |
2437 | { | |
2438 | if (spaces) | |
2439 | xfree (spaces); | |
2440 | spaces = (char *) xmalloc (n + 1); | |
2441 | for (t = spaces + n; t != spaces;) | |
2442 | *--t = ' '; | |
2443 | spaces[n] = '\0'; | |
2444 | max_spaces = n; | |
2445 | } | |
2446 | ||
2447 | return spaces + max_spaces - n; | |
2448 | } | |
2449 | ||
2450 | /* Print N spaces. */ | |
2451 | void | |
2452 | print_spaces_filtered (int n, struct ui_file *stream) | |
2453 | { | |
2454 | fputs_filtered (n_spaces (n), stream); | |
2455 | } | |
2456 | \f | |
2457 | /* C++/ObjC demangler stuff. */ | |
2458 | ||
2459 | /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language | |
2460 | LANG, using demangling args ARG_MODE, and print it filtered to STREAM. | |
2461 | If the name is not mangled, or the language for the name is unknown, or | |
2462 | demangling is off, the name is printed in its "raw" form. */ | |
2463 | ||
2464 | void | |
2465 | fprintf_symbol_filtered (struct ui_file *stream, const char *name, | |
2466 | enum language lang, int arg_mode) | |
2467 | { | |
2468 | char *demangled; | |
2469 | ||
2470 | if (name != NULL) | |
2471 | { | |
2472 | /* If user wants to see raw output, no problem. */ | |
2473 | if (!demangle) | |
2474 | { | |
2475 | fputs_filtered (name, stream); | |
2476 | } | |
2477 | else | |
2478 | { | |
2479 | demangled = language_demangle (language_def (lang), name, arg_mode); | |
2480 | fputs_filtered (demangled ? demangled : name, stream); | |
2481 | if (demangled != NULL) | |
2482 | { | |
2483 | xfree (demangled); | |
2484 | } | |
2485 | } | |
2486 | } | |
2487 | } | |
2488 | ||
2489 | /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any | |
2490 | differences in whitespace. Returns 0 if they match, non-zero if they | |
2491 | don't (slightly different than strcmp()'s range of return values). | |
2492 | ||
2493 | As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO". | |
2494 | This "feature" is useful when searching for matching C++ function names | |
2495 | (such as if the user types 'break FOO', where FOO is a mangled C++ | |
2496 | function). */ | |
2497 | ||
2498 | int | |
2499 | strcmp_iw (const char *string1, const char *string2) | |
2500 | { | |
2501 | while ((*string1 != '\0') && (*string2 != '\0')) | |
2502 | { | |
2503 | while (isspace (*string1)) | |
2504 | { | |
2505 | string1++; | |
2506 | } | |
2507 | while (isspace (*string2)) | |
2508 | { | |
2509 | string2++; | |
2510 | } | |
2511 | if (case_sensitivity == case_sensitive_on && *string1 != *string2) | |
2512 | break; | |
2513 | if (case_sensitivity == case_sensitive_off | |
2514 | && (tolower ((unsigned char) *string1) | |
2515 | != tolower ((unsigned char) *string2))) | |
2516 | break; | |
2517 | if (*string1 != '\0') | |
2518 | { | |
2519 | string1++; | |
2520 | string2++; | |
2521 | } | |
2522 | } | |
2523 | return (*string1 != '\0' && *string1 != '(') || (*string2 != '\0'); | |
2524 | } | |
2525 | ||
2526 | /* This is like strcmp except that it ignores whitespace and treats | |
2527 | '(' as the first non-NULL character in terms of ordering. Like | |
2528 | strcmp (and unlike strcmp_iw), it returns negative if STRING1 < | |
2529 | STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2 | |
2530 | according to that ordering. | |
2531 | ||
2532 | If a list is sorted according to this function and if you want to | |
2533 | find names in the list that match some fixed NAME according to | |
2534 | strcmp_iw(LIST_ELT, NAME), then the place to start looking is right | |
2535 | where this function would put NAME. | |
2536 | ||
2537 | This function must be neutral to the CASE_SENSITIVITY setting as the user | |
2538 | may choose it during later lookup. Therefore this function always sorts | |
2539 | primarily case-insensitively and secondarily case-sensitively. | |
2540 | ||
2541 | Here are some examples of why using strcmp to sort is a bad idea: | |
2542 | ||
2543 | Whitespace example: | |
2544 | ||
2545 | Say your partial symtab contains: "foo<char *>", "goo". Then, if | |
2546 | we try to do a search for "foo<char*>", strcmp will locate this | |
2547 | after "foo<char *>" and before "goo". Then lookup_partial_symbol | |
2548 | will start looking at strings beginning with "goo", and will never | |
2549 | see the correct match of "foo<char *>". | |
2550 | ||
2551 | Parenthesis example: | |
2552 | ||
2553 | In practice, this is less like to be an issue, but I'll give it a | |
2554 | shot. Let's assume that '$' is a legitimate character to occur in | |
2555 | symbols. (Which may well even be the case on some systems.) Then | |
2556 | say that the partial symbol table contains "foo$" and "foo(int)". | |
2557 | strcmp will put them in this order, since '$' < '('. Now, if the | |
2558 | user searches for "foo", then strcmp will sort "foo" before "foo$". | |
2559 | Then lookup_partial_symbol will notice that strcmp_iw("foo$", | |
2560 | "foo") is false, so it won't proceed to the actual match of | |
2561 | "foo(int)" with "foo". */ | |
2562 | ||
2563 | int | |
2564 | strcmp_iw_ordered (const char *string1, const char *string2) | |
2565 | { | |
2566 | const char *saved_string1 = string1, *saved_string2 = string2; | |
2567 | enum case_sensitivity case_pass = case_sensitive_off; | |
2568 | ||
2569 | for (;;) | |
2570 | { | |
2571 | /* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'. | |
2572 | Provide stub characters if we are already at the end of one of the | |
2573 | strings. */ | |
2574 | char c1 = 'X', c2 = 'X'; | |
2575 | ||
2576 | while (*string1 != '\0' && *string2 != '\0') | |
2577 | { | |
2578 | while (isspace (*string1)) | |
2579 | string1++; | |
2580 | while (isspace (*string2)) | |
2581 | string2++; | |
2582 | ||
2583 | switch (case_pass) | |
2584 | { | |
2585 | case case_sensitive_off: | |
2586 | c1 = tolower ((unsigned char) *string1); | |
2587 | c2 = tolower ((unsigned char) *string2); | |
2588 | break; | |
2589 | case case_sensitive_on: | |
2590 | c1 = *string1; | |
2591 | c2 = *string2; | |
2592 | break; | |
2593 | } | |
2594 | if (c1 != c2) | |
2595 | break; | |
2596 | ||
2597 | if (*string1 != '\0') | |
2598 | { | |
2599 | string1++; | |
2600 | string2++; | |
2601 | } | |
2602 | } | |
2603 | ||
2604 | switch (*string1) | |
2605 | { | |
2606 | /* Characters are non-equal unless they're both '\0'; we want to | |
2607 | make sure we get the comparison right according to our | |
2608 | comparison in the cases where one of them is '\0' or '('. */ | |
2609 | case '\0': | |
2610 | if (*string2 == '\0') | |
2611 | break; | |
2612 | else | |
2613 | return -1; | |
2614 | case '(': | |
2615 | if (*string2 == '\0') | |
2616 | return 1; | |
2617 | else | |
2618 | return -1; | |
2619 | default: | |
2620 | if (*string2 == '\0' || *string2 == '(') | |
2621 | return 1; | |
2622 | else if (c1 > c2) | |
2623 | return 1; | |
2624 | else if (c1 < c2) | |
2625 | return -1; | |
2626 | /* PASSTHRU */ | |
2627 | } | |
2628 | ||
2629 | if (case_pass == case_sensitive_on) | |
2630 | return 0; | |
2631 | ||
2632 | /* Otherwise the strings were equal in case insensitive way, make | |
2633 | a more fine grained comparison in a case sensitive way. */ | |
2634 | ||
2635 | case_pass = case_sensitive_on; | |
2636 | string1 = saved_string1; | |
2637 | string2 = saved_string2; | |
2638 | } | |
2639 | } | |
2640 | ||
2641 | /* A simple comparison function with opposite semantics to strcmp. */ | |
2642 | ||
2643 | int | |
2644 | streq (const char *lhs, const char *rhs) | |
2645 | { | |
2646 | return !strcmp (lhs, rhs); | |
2647 | } | |
2648 | \f | |
2649 | ||
2650 | /* | |
2651 | ** subset_compare() | |
2652 | ** Answer whether string_to_compare is a full or partial match to | |
2653 | ** template_string. The partial match must be in sequence starting | |
2654 | ** at index 0. | |
2655 | */ | |
2656 | int | |
2657 | subset_compare (char *string_to_compare, char *template_string) | |
2658 | { | |
2659 | int match; | |
2660 | ||
2661 | if (template_string != (char *) NULL && string_to_compare != (char *) NULL | |
2662 | && strlen (string_to_compare) <= strlen (template_string)) | |
2663 | match = | |
2664 | (startswith (template_string, string_to_compare)); | |
2665 | else | |
2666 | match = 0; | |
2667 | return match; | |
2668 | } | |
2669 | ||
2670 | static void | |
2671 | show_debug_timestamp (struct ui_file *file, int from_tty, | |
2672 | struct cmd_list_element *c, const char *value) | |
2673 | { | |
2674 | fprintf_filtered (file, _("Timestamping debugging messages is %s.\n"), | |
2675 | value); | |
2676 | } | |
2677 | \f | |
2678 | ||
2679 | void | |
2680 | initialize_utils (void) | |
2681 | { | |
2682 | add_setshow_uinteger_cmd ("width", class_support, &chars_per_line, _("\ | |
2683 | Set number of characters where GDB should wrap lines of its output."), _("\ | |
2684 | Show number of characters where GDB should wrap lines of its output."), _("\ | |
2685 | This affects where GDB wraps its output to fit the screen width.\n\ | |
2686 | Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."), | |
2687 | set_width_command, | |
2688 | show_chars_per_line, | |
2689 | &setlist, &showlist); | |
2690 | ||
2691 | add_setshow_uinteger_cmd ("height", class_support, &lines_per_page, _("\ | |
2692 | Set number of lines in a page for GDB output pagination."), _("\ | |
2693 | Show number of lines in a page for GDB output pagination."), _("\ | |
2694 | This affects the number of lines after which GDB will pause\n\ | |
2695 | its output and ask you whether to continue.\n\ | |
2696 | Setting this to \"unlimited\" or zero causes GDB never pause during output."), | |
2697 | set_height_command, | |
2698 | show_lines_per_page, | |
2699 | &setlist, &showlist); | |
2700 | ||
2701 | add_setshow_boolean_cmd ("pagination", class_support, | |
2702 | &pagination_enabled, _("\ | |
2703 | Set state of GDB output pagination."), _("\ | |
2704 | Show state of GDB output pagination."), _("\ | |
2705 | When pagination is ON, GDB pauses at end of each screenful of\n\ | |
2706 | its output and asks you whether to continue.\n\ | |
2707 | Turning pagination off is an alternative to \"set height unlimited\"."), | |
2708 | NULL, | |
2709 | show_pagination_enabled, | |
2710 | &setlist, &showlist); | |
2711 | ||
2712 | add_setshow_boolean_cmd ("sevenbit-strings", class_support, | |
2713 | &sevenbit_strings, _("\ | |
2714 | Set printing of 8-bit characters in strings as \\nnn."), _("\ | |
2715 | Show printing of 8-bit characters in strings as \\nnn."), NULL, | |
2716 | NULL, | |
2717 | show_sevenbit_strings, | |
2718 | &setprintlist, &showprintlist); | |
2719 | ||
2720 | add_setshow_boolean_cmd ("timestamp", class_maintenance, | |
2721 | &debug_timestamp, _("\ | |
2722 | Set timestamping of debugging messages."), _("\ | |
2723 | Show timestamping of debugging messages."), _("\ | |
2724 | When set, debugging messages will be marked with seconds and microseconds."), | |
2725 | NULL, | |
2726 | show_debug_timestamp, | |
2727 | &setdebuglist, &showdebuglist); | |
2728 | } | |
2729 | ||
2730 | const char * | |
2731 | paddress (struct gdbarch *gdbarch, CORE_ADDR addr) | |
2732 | { | |
2733 | /* Truncate address to the size of a target address, avoiding shifts | |
2734 | larger or equal than the width of a CORE_ADDR. The local | |
2735 | variable ADDR_BIT stops the compiler reporting a shift overflow | |
2736 | when it won't occur. */ | |
2737 | /* NOTE: This assumes that the significant address information is | |
2738 | kept in the least significant bits of ADDR - the upper bits were | |
2739 | either zero or sign extended. Should gdbarch_address_to_pointer or | |
2740 | some ADDRESS_TO_PRINTABLE() be used to do the conversion? */ | |
2741 | ||
2742 | int addr_bit = gdbarch_addr_bit (gdbarch); | |
2743 | ||
2744 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) | |
2745 | addr &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
2746 | return hex_string (addr); | |
2747 | } | |
2748 | ||
2749 | /* This function is described in "defs.h". */ | |
2750 | ||
2751 | const char * | |
2752 | print_core_address (struct gdbarch *gdbarch, CORE_ADDR address) | |
2753 | { | |
2754 | int addr_bit = gdbarch_addr_bit (gdbarch); | |
2755 | ||
2756 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) | |
2757 | address &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
2758 | ||
2759 | /* FIXME: cagney/2002-05-03: Need local_address_string() function | |
2760 | that returns the language localized string formatted to a width | |
2761 | based on gdbarch_addr_bit. */ | |
2762 | if (addr_bit <= 32) | |
2763 | return hex_string_custom (address, 8); | |
2764 | else | |
2765 | return hex_string_custom (address, 16); | |
2766 | } | |
2767 | ||
2768 | /* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */ | |
2769 | ||
2770 | hashval_t | |
2771 | core_addr_hash (const void *ap) | |
2772 | { | |
2773 | const CORE_ADDR *addrp = ap; | |
2774 | ||
2775 | return *addrp; | |
2776 | } | |
2777 | ||
2778 | /* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */ | |
2779 | ||
2780 | int | |
2781 | core_addr_eq (const void *ap, const void *bp) | |
2782 | { | |
2783 | const CORE_ADDR *addr_ap = ap; | |
2784 | const CORE_ADDR *addr_bp = bp; | |
2785 | ||
2786 | return *addr_ap == *addr_bp; | |
2787 | } | |
2788 | ||
2789 | /* Convert a string back into a CORE_ADDR. */ | |
2790 | CORE_ADDR | |
2791 | string_to_core_addr (const char *my_string) | |
2792 | { | |
2793 | CORE_ADDR addr = 0; | |
2794 | ||
2795 | if (my_string[0] == '0' && tolower (my_string[1]) == 'x') | |
2796 | { | |
2797 | /* Assume that it is in hex. */ | |
2798 | int i; | |
2799 | ||
2800 | for (i = 2; my_string[i] != '\0'; i++) | |
2801 | { | |
2802 | if (isdigit (my_string[i])) | |
2803 | addr = (my_string[i] - '0') + (addr * 16); | |
2804 | else if (isxdigit (my_string[i])) | |
2805 | addr = (tolower (my_string[i]) - 'a' + 0xa) + (addr * 16); | |
2806 | else | |
2807 | error (_("invalid hex \"%s\""), my_string); | |
2808 | } | |
2809 | } | |
2810 | else | |
2811 | { | |
2812 | /* Assume that it is in decimal. */ | |
2813 | int i; | |
2814 | ||
2815 | for (i = 0; my_string[i] != '\0'; i++) | |
2816 | { | |
2817 | if (isdigit (my_string[i])) | |
2818 | addr = (my_string[i] - '0') + (addr * 10); | |
2819 | else | |
2820 | error (_("invalid decimal \"%s\""), my_string); | |
2821 | } | |
2822 | } | |
2823 | ||
2824 | return addr; | |
2825 | } | |
2826 | ||
2827 | char * | |
2828 | gdb_realpath (const char *filename) | |
2829 | { | |
2830 | /* On most hosts, we rely on canonicalize_file_name to compute | |
2831 | the FILENAME's realpath. | |
2832 | ||
2833 | But the situation is slightly more complex on Windows, due to some | |
2834 | versions of GCC which were reported to generate paths where | |
2835 | backlashes (the directory separator) were doubled. For instance: | |
2836 | c:\\some\\double\\slashes\\dir | |
2837 | ... instead of ... | |
2838 | c:\some\double\slashes\dir | |
2839 | Those double-slashes were getting in the way when comparing paths, | |
2840 | for instance when trying to insert a breakpoint as follow: | |
2841 | (gdb) b c:/some/double/slashes/dir/foo.c:4 | |
2842 | No source file named c:/some/double/slashes/dir/foo.c:4. | |
2843 | (gdb) b c:\some\double\slashes\dir\foo.c:4 | |
2844 | No source file named c:\some\double\slashes\dir\foo.c:4. | |
2845 | To prevent this from happening, we need this function to always | |
2846 | strip those extra backslashes. While canonicalize_file_name does | |
2847 | perform this simplification, it only works when the path is valid. | |
2848 | Since the simplification would be useful even if the path is not | |
2849 | valid (one can always set a breakpoint on a file, even if the file | |
2850 | does not exist locally), we rely instead on GetFullPathName to | |
2851 | perform the canonicalization. */ | |
2852 | ||
2853 | #if defined (_WIN32) | |
2854 | { | |
2855 | char buf[MAX_PATH]; | |
2856 | DWORD len = GetFullPathName (filename, MAX_PATH, buf, NULL); | |
2857 | ||
2858 | /* The file system is case-insensitive but case-preserving. | |
2859 | So it is important we do not lowercase the path. Otherwise, | |
2860 | we might not be able to display the original casing in a given | |
2861 | path. */ | |
2862 | if (len > 0 && len < MAX_PATH) | |
2863 | return xstrdup (buf); | |
2864 | } | |
2865 | #else | |
2866 | { | |
2867 | char *rp = canonicalize_file_name (filename); | |
2868 | ||
2869 | if (rp != NULL) | |
2870 | return rp; | |
2871 | } | |
2872 | #endif | |
2873 | ||
2874 | /* This system is a lost cause, just dup the buffer. */ | |
2875 | return xstrdup (filename); | |
2876 | } | |
2877 | ||
2878 | /* Return a copy of FILENAME, with its directory prefix canonicalized | |
2879 | by gdb_realpath. */ | |
2880 | ||
2881 | char * | |
2882 | gdb_realpath_keepfile (const char *filename) | |
2883 | { | |
2884 | const char *base_name = lbasename (filename); | |
2885 | char *dir_name; | |
2886 | char *real_path; | |
2887 | char *result; | |
2888 | ||
2889 | /* Extract the basename of filename, and return immediately | |
2890 | a copy of filename if it does not contain any directory prefix. */ | |
2891 | if (base_name == filename) | |
2892 | return xstrdup (filename); | |
2893 | ||
2894 | dir_name = alloca ((size_t) (base_name - filename + 2)); | |
2895 | /* Allocate enough space to store the dir_name + plus one extra | |
2896 | character sometimes needed under Windows (see below), and | |
2897 | then the closing \000 character. */ | |
2898 | strncpy (dir_name, filename, base_name - filename); | |
2899 | dir_name[base_name - filename] = '\000'; | |
2900 | ||
2901 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
2902 | /* We need to be careful when filename is of the form 'd:foo', which | |
2903 | is equivalent of d:./foo, which is totally different from d:/foo. */ | |
2904 | if (strlen (dir_name) == 2 && isalpha (dir_name[0]) && dir_name[1] == ':') | |
2905 | { | |
2906 | dir_name[2] = '.'; | |
2907 | dir_name[3] = '\000'; | |
2908 | } | |
2909 | #endif | |
2910 | ||
2911 | /* Canonicalize the directory prefix, and build the resulting | |
2912 | filename. If the dirname realpath already contains an ending | |
2913 | directory separator, avoid doubling it. */ | |
2914 | real_path = gdb_realpath (dir_name); | |
2915 | if (IS_DIR_SEPARATOR (real_path[strlen (real_path) - 1])) | |
2916 | result = concat (real_path, base_name, (char *) NULL); | |
2917 | else | |
2918 | result = concat (real_path, SLASH_STRING, base_name, (char *) NULL); | |
2919 | ||
2920 | xfree (real_path); | |
2921 | return result; | |
2922 | } | |
2923 | ||
2924 | /* Return PATH in absolute form, performing tilde-expansion if necessary. | |
2925 | PATH cannot be NULL or the empty string. | |
2926 | This does not resolve symlinks however, use gdb_realpath for that. | |
2927 | Space for the result is allocated with malloc. | |
2928 | If the path is already absolute, it is strdup'd. | |
2929 | If there is a problem computing the absolute path, the path is returned | |
2930 | unchanged (still strdup'd). */ | |
2931 | ||
2932 | char * | |
2933 | gdb_abspath (const char *path) | |
2934 | { | |
2935 | gdb_assert (path != NULL && path[0] != '\0'); | |
2936 | ||
2937 | if (path[0] == '~') | |
2938 | return tilde_expand (path); | |
2939 | ||
2940 | if (IS_ABSOLUTE_PATH (path)) | |
2941 | return xstrdup (path); | |
2942 | ||
2943 | /* Beware the // my son, the Emacs barfs, the botch that catch... */ | |
2944 | return concat (current_directory, | |
2945 | IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1]) | |
2946 | ? "" : SLASH_STRING, | |
2947 | path, (char *) NULL); | |
2948 | } | |
2949 | ||
2950 | ULONGEST | |
2951 | align_up (ULONGEST v, int n) | |
2952 | { | |
2953 | /* Check that N is really a power of two. */ | |
2954 | gdb_assert (n && (n & (n-1)) == 0); | |
2955 | return (v + n - 1) & -n; | |
2956 | } | |
2957 | ||
2958 | ULONGEST | |
2959 | align_down (ULONGEST v, int n) | |
2960 | { | |
2961 | /* Check that N is really a power of two. */ | |
2962 | gdb_assert (n && (n & (n-1)) == 0); | |
2963 | return (v & -n); | |
2964 | } | |
2965 | ||
2966 | /* Allocation function for the libiberty hash table which uses an | |
2967 | obstack. The obstack is passed as DATA. */ | |
2968 | ||
2969 | void * | |
2970 | hashtab_obstack_allocate (void *data, size_t size, size_t count) | |
2971 | { | |
2972 | size_t total = size * count; | |
2973 | void *ptr = obstack_alloc ((struct obstack *) data, total); | |
2974 | ||
2975 | memset (ptr, 0, total); | |
2976 | return ptr; | |
2977 | } | |
2978 | ||
2979 | /* Trivial deallocation function for the libiberty splay tree and hash | |
2980 | table - don't deallocate anything. Rely on later deletion of the | |
2981 | obstack. DATA will be the obstack, although it is not needed | |
2982 | here. */ | |
2983 | ||
2984 | void | |
2985 | dummy_obstack_deallocate (void *object, void *data) | |
2986 | { | |
2987 | return; | |
2988 | } | |
2989 | ||
2990 | /* Simple, portable version of dirname that does not modify its | |
2991 | argument. */ | |
2992 | ||
2993 | char * | |
2994 | ldirname (const char *filename) | |
2995 | { | |
2996 | const char *base = lbasename (filename); | |
2997 | char *dirname; | |
2998 | ||
2999 | while (base > filename && IS_DIR_SEPARATOR (base[-1])) | |
3000 | --base; | |
3001 | ||
3002 | if (base == filename) | |
3003 | return NULL; | |
3004 | ||
3005 | dirname = xmalloc (base - filename + 2); | |
3006 | memcpy (dirname, filename, base - filename); | |
3007 | ||
3008 | /* On DOS based file systems, convert "d:foo" to "d:.", so that we | |
3009 | create "d:./bar" later instead of the (different) "d:/bar". */ | |
3010 | if (base - filename == 2 && IS_ABSOLUTE_PATH (base) | |
3011 | && !IS_DIR_SEPARATOR (filename[0])) | |
3012 | dirname[base++ - filename] = '.'; | |
3013 | ||
3014 | dirname[base - filename] = '\0'; | |
3015 | return dirname; | |
3016 | } | |
3017 | ||
3018 | /* Call libiberty's buildargv, and return the result. | |
3019 | If buildargv fails due to out-of-memory, call nomem. | |
3020 | Therefore, the returned value is guaranteed to be non-NULL, | |
3021 | unless the parameter itself is NULL. */ | |
3022 | ||
3023 | char ** | |
3024 | gdb_buildargv (const char *s) | |
3025 | { | |
3026 | char **argv = buildargv (s); | |
3027 | ||
3028 | if (s != NULL && argv == NULL) | |
3029 | malloc_failure (0); | |
3030 | return argv; | |
3031 | } | |
3032 | ||
3033 | int | |
3034 | compare_positive_ints (const void *ap, const void *bp) | |
3035 | { | |
3036 | /* Because we know we're comparing two ints which are positive, | |
3037 | there's no danger of overflow here. */ | |
3038 | return * (int *) ap - * (int *) bp; | |
3039 | } | |
3040 | ||
3041 | /* String compare function for qsort. */ | |
3042 | ||
3043 | int | |
3044 | compare_strings (const void *arg1, const void *arg2) | |
3045 | { | |
3046 | const char **s1 = (const char **) arg1; | |
3047 | const char **s2 = (const char **) arg2; | |
3048 | ||
3049 | return strcmp (*s1, *s2); | |
3050 | } | |
3051 | ||
3052 | #define AMBIGUOUS_MESS1 ".\nMatching formats:" | |
3053 | #define AMBIGUOUS_MESS2 \ | |
3054 | ".\nUse \"set gnutarget format-name\" to specify the format." | |
3055 | ||
3056 | const char * | |
3057 | gdb_bfd_errmsg (bfd_error_type error_tag, char **matching) | |
3058 | { | |
3059 | char *ret, *retp; | |
3060 | int ret_len; | |
3061 | char **p; | |
3062 | ||
3063 | /* Check if errmsg just need simple return. */ | |
3064 | if (error_tag != bfd_error_file_ambiguously_recognized || matching == NULL) | |
3065 | return bfd_errmsg (error_tag); | |
3066 | ||
3067 | ret_len = strlen (bfd_errmsg (error_tag)) + strlen (AMBIGUOUS_MESS1) | |
3068 | + strlen (AMBIGUOUS_MESS2); | |
3069 | for (p = matching; *p; p++) | |
3070 | ret_len += strlen (*p) + 1; | |
3071 | ret = xmalloc (ret_len + 1); | |
3072 | retp = ret; | |
3073 | make_cleanup (xfree, ret); | |
3074 | ||
3075 | strcpy (retp, bfd_errmsg (error_tag)); | |
3076 | retp += strlen (retp); | |
3077 | ||
3078 | strcpy (retp, AMBIGUOUS_MESS1); | |
3079 | retp += strlen (retp); | |
3080 | ||
3081 | for (p = matching; *p; p++) | |
3082 | { | |
3083 | sprintf (retp, " %s", *p); | |
3084 | retp += strlen (retp); | |
3085 | } | |
3086 | xfree (matching); | |
3087 | ||
3088 | strcpy (retp, AMBIGUOUS_MESS2); | |
3089 | ||
3090 | return ret; | |
3091 | } | |
3092 | ||
3093 | /* Return ARGS parsed as a valid pid, or throw an error. */ | |
3094 | ||
3095 | int | |
3096 | parse_pid_to_attach (const char *args) | |
3097 | { | |
3098 | unsigned long pid; | |
3099 | char *dummy; | |
3100 | ||
3101 | if (!args) | |
3102 | error_no_arg (_("process-id to attach")); | |
3103 | ||
3104 | dummy = (char *) args; | |
3105 | pid = strtoul (args, &dummy, 0); | |
3106 | /* Some targets don't set errno on errors, grrr! */ | |
3107 | if ((pid == 0 && dummy == args) || dummy != &args[strlen (args)]) | |
3108 | error (_("Illegal process-id: %s."), args); | |
3109 | ||
3110 | return pid; | |
3111 | } | |
3112 | ||
3113 | /* Helper for make_bpstat_clear_actions_cleanup. */ | |
3114 | ||
3115 | static void | |
3116 | do_bpstat_clear_actions_cleanup (void *unused) | |
3117 | { | |
3118 | bpstat_clear_actions (); | |
3119 | } | |
3120 | ||
3121 | /* Call bpstat_clear_actions for the case an exception is throw. You should | |
3122 | discard_cleanups if no exception is caught. */ | |
3123 | ||
3124 | struct cleanup * | |
3125 | make_bpstat_clear_actions_cleanup (void) | |
3126 | { | |
3127 | return make_cleanup (do_bpstat_clear_actions_cleanup, NULL); | |
3128 | } | |
3129 | ||
3130 | /* Check for GCC >= 4.x according to the symtab->producer string. Return minor | |
3131 | version (x) of 4.x in such case. If it is not GCC or it is GCC older than | |
3132 | 4.x return -1. If it is GCC 5.x or higher return INT_MAX. */ | |
3133 | ||
3134 | int | |
3135 | producer_is_gcc_ge_4 (const char *producer) | |
3136 | { | |
3137 | int major, minor; | |
3138 | ||
3139 | if (! producer_is_gcc (producer, &major, &minor)) | |
3140 | return -1; | |
3141 | if (major < 4) | |
3142 | return -1; | |
3143 | if (major > 4) | |
3144 | return INT_MAX; | |
3145 | return minor; | |
3146 | } | |
3147 | ||
3148 | /* Returns nonzero if the given PRODUCER string is GCC and sets the MAJOR | |
3149 | and MINOR versions when not NULL. Returns zero if the given PRODUCER | |
3150 | is NULL or it isn't GCC. */ | |
3151 | ||
3152 | int | |
3153 | producer_is_gcc (const char *producer, int *major, int *minor) | |
3154 | { | |
3155 | const char *cs; | |
3156 | ||
3157 | if (producer != NULL && startswith (producer, "GNU ")) | |
3158 | { | |
3159 | int maj, min; | |
3160 | ||
3161 | if (major == NULL) | |
3162 | major = &maj; | |
3163 | if (minor == NULL) | |
3164 | minor = &min; | |
3165 | ||
3166 | /* Skip any identifier after "GNU " - such as "C11" "C++" or "Java". | |
3167 | A full producer string might look like: | |
3168 | "GNU C 4.7.2" | |
3169 | "GNU Fortran 4.8.2 20140120 (Red Hat 4.8.2-16) -mtune=generic ..." | |
3170 | "GNU C++14 5.0.0 20150123 (experimental)" | |
3171 | */ | |
3172 | cs = &producer[strlen ("GNU ")]; | |
3173 | while (*cs && !isspace (*cs)) | |
3174 | cs++; | |
3175 | if (*cs && isspace (*cs)) | |
3176 | cs++; | |
3177 | if (sscanf (cs, "%d.%d", major, minor) == 2) | |
3178 | return 1; | |
3179 | } | |
3180 | ||
3181 | /* Not recognized as GCC. */ | |
3182 | return 0; | |
3183 | } | |
3184 | ||
3185 | /* Helper for make_cleanup_free_char_ptr_vec. */ | |
3186 | ||
3187 | static void | |
3188 | do_free_char_ptr_vec (void *arg) | |
3189 | { | |
3190 | VEC (char_ptr) *char_ptr_vec = arg; | |
3191 | ||
3192 | free_char_ptr_vec (char_ptr_vec); | |
3193 | } | |
3194 | ||
3195 | /* Make cleanup handler calling xfree for each element of CHAR_PTR_VEC and | |
3196 | final VEC_free for CHAR_PTR_VEC itself. | |
3197 | ||
3198 | You must not modify CHAR_PTR_VEC after this cleanup registration as the | |
3199 | CHAR_PTR_VEC base address may change on its updates. Contrary to VEC_free | |
3200 | this function does not (cannot) clear the pointer. */ | |
3201 | ||
3202 | struct cleanup * | |
3203 | make_cleanup_free_char_ptr_vec (VEC (char_ptr) *char_ptr_vec) | |
3204 | { | |
3205 | return make_cleanup (do_free_char_ptr_vec, char_ptr_vec); | |
3206 | } | |
3207 | ||
3208 | /* Substitute all occurences of string FROM by string TO in *STRINGP. *STRINGP | |
3209 | must come from xrealloc-compatible allocator and it may be updated. FROM | |
3210 | needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be | |
3211 | located at the start or end of *STRINGP. */ | |
3212 | ||
3213 | void | |
3214 | substitute_path_component (char **stringp, const char *from, const char *to) | |
3215 | { | |
3216 | char *string = *stringp, *s; | |
3217 | const size_t from_len = strlen (from); | |
3218 | const size_t to_len = strlen (to); | |
3219 | ||
3220 | for (s = string;;) | |
3221 | { | |
3222 | s = strstr (s, from); | |
3223 | if (s == NULL) | |
3224 | break; | |
3225 | ||
3226 | if ((s == string || IS_DIR_SEPARATOR (s[-1]) | |
3227 | || s[-1] == DIRNAME_SEPARATOR) | |
3228 | && (s[from_len] == '\0' || IS_DIR_SEPARATOR (s[from_len]) | |
3229 | || s[from_len] == DIRNAME_SEPARATOR)) | |
3230 | { | |
3231 | char *string_new; | |
3232 | ||
3233 | string_new = xrealloc (string, (strlen (string) + to_len + 1)); | |
3234 | ||
3235 | /* Relocate the current S pointer. */ | |
3236 | s = s - string + string_new; | |
3237 | string = string_new; | |
3238 | ||
3239 | /* Replace from by to. */ | |
3240 | memmove (&s[to_len], &s[from_len], strlen (&s[from_len]) + 1); | |
3241 | memcpy (s, to, to_len); | |
3242 | ||
3243 | s += to_len; | |
3244 | } | |
3245 | else | |
3246 | s++; | |
3247 | } | |
3248 | ||
3249 | *stringp = string; | |
3250 | } | |
3251 | ||
3252 | #ifdef HAVE_WAITPID | |
3253 | ||
3254 | #ifdef SIGALRM | |
3255 | ||
3256 | /* SIGALRM handler for waitpid_with_timeout. */ | |
3257 | ||
3258 | static void | |
3259 | sigalrm_handler (int signo) | |
3260 | { | |
3261 | /* Nothing to do. */ | |
3262 | } | |
3263 | ||
3264 | #endif | |
3265 | ||
3266 | /* Wrapper to wait for child PID to die with TIMEOUT. | |
3267 | TIMEOUT is the time to stop waiting in seconds. | |
3268 | If TIMEOUT is zero, pass WNOHANG to waitpid. | |
3269 | Returns PID if it was successfully waited for, otherwise -1. | |
3270 | ||
3271 | Timeouts are currently implemented with alarm and SIGALRM. | |
3272 | If the host does not support them, this waits "forever". | |
3273 | It would be odd though for a host to have waitpid and not SIGALRM. */ | |
3274 | ||
3275 | pid_t | |
3276 | wait_to_die_with_timeout (pid_t pid, int *status, int timeout) | |
3277 | { | |
3278 | pid_t waitpid_result; | |
3279 | ||
3280 | gdb_assert (pid > 0); | |
3281 | gdb_assert (timeout >= 0); | |
3282 | ||
3283 | if (timeout > 0) | |
3284 | { | |
3285 | #ifdef SIGALRM | |
3286 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
3287 | struct sigaction sa, old_sa; | |
3288 | ||
3289 | sa.sa_handler = sigalrm_handler; | |
3290 | sigemptyset (&sa.sa_mask); | |
3291 | sa.sa_flags = 0; | |
3292 | sigaction (SIGALRM, &sa, &old_sa); | |
3293 | #else | |
3294 | void (*ofunc) (); | |
3295 | ||
3296 | ofunc = (void (*)()) signal (SIGALRM, sigalrm_handler); | |
3297 | #endif | |
3298 | ||
3299 | alarm (timeout); | |
3300 | #endif | |
3301 | ||
3302 | waitpid_result = waitpid (pid, status, 0); | |
3303 | ||
3304 | #ifdef SIGALRM | |
3305 | alarm (0); | |
3306 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
3307 | sigaction (SIGALRM, &old_sa, NULL); | |
3308 | #else | |
3309 | signal (SIGALRM, ofunc); | |
3310 | #endif | |
3311 | #endif | |
3312 | } | |
3313 | else | |
3314 | waitpid_result = waitpid (pid, status, WNOHANG); | |
3315 | ||
3316 | if (waitpid_result == pid) | |
3317 | return pid; | |
3318 | else | |
3319 | return -1; | |
3320 | } | |
3321 | ||
3322 | #endif /* HAVE_WAITPID */ | |
3323 | ||
3324 | /* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files. | |
3325 | Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS. | |
3326 | ||
3327 | It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and | |
3328 | HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */ | |
3329 | ||
3330 | int | |
3331 | gdb_filename_fnmatch (const char *pattern, const char *string, int flags) | |
3332 | { | |
3333 | gdb_assert ((flags & FNM_FILE_NAME) != 0); | |
3334 | ||
3335 | /* It is unclear how '\' escaping vs. directory separator should coexist. */ | |
3336 | gdb_assert ((flags & FNM_NOESCAPE) != 0); | |
3337 | ||
3338 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
3339 | { | |
3340 | char *pattern_slash, *string_slash; | |
3341 | ||
3342 | /* Replace '\' by '/' in both strings. */ | |
3343 | ||
3344 | pattern_slash = alloca (strlen (pattern) + 1); | |
3345 | strcpy (pattern_slash, pattern); | |
3346 | pattern = pattern_slash; | |
3347 | for (; *pattern_slash != 0; pattern_slash++) | |
3348 | if (IS_DIR_SEPARATOR (*pattern_slash)) | |
3349 | *pattern_slash = '/'; | |
3350 | ||
3351 | string_slash = alloca (strlen (string) + 1); | |
3352 | strcpy (string_slash, string); | |
3353 | string = string_slash; | |
3354 | for (; *string_slash != 0; string_slash++) | |
3355 | if (IS_DIR_SEPARATOR (*string_slash)) | |
3356 | *string_slash = '/'; | |
3357 | } | |
3358 | #endif /* HAVE_DOS_BASED_FILE_SYSTEM */ | |
3359 | ||
3360 | #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM | |
3361 | flags |= FNM_CASEFOLD; | |
3362 | #endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */ | |
3363 | ||
3364 | return fnmatch (pattern, string, flags); | |
3365 | } | |
3366 | ||
3367 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
3368 | extern initialize_file_ftype _initialize_utils; | |
3369 | ||
3370 | void | |
3371 | _initialize_utils (void) | |
3372 | { | |
3373 | add_internal_problem_command (&internal_error_problem); | |
3374 | add_internal_problem_command (&internal_warning_problem); | |
3375 | add_internal_problem_command (&demangler_warning_problem); | |
3376 | } |