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bd5635a1 RP |
1 | /* List lines of source files for GDB, the GNU debugger. |
2 | Copyright (C) 1986, 1987, 1988, 1989, 1991 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | GDB is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GDB is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GDB; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | #include <stdio.h> | |
21 | #include "defs.h" | |
22 | #include "symtab.h" | |
23 | #include "param.h" | |
24 | #include "command.h" | |
25 | #include "frame.h" | |
26 | ||
27 | #ifdef USG | |
28 | #include <sys/types.h> | |
29 | #endif | |
30 | ||
31 | #include <string.h> | |
32 | #include <sys/param.h> | |
33 | #include <sys/stat.h> | |
34 | #include <fcntl.h> | |
35 | #include "gdbcore.h" | |
36 | ||
37 | extern char *strstr(); | |
38 | ||
39 | extern void set_next_address (); | |
40 | ||
41 | void mod_path (); | |
42 | ||
43 | /* Path of directories to search for source files. | |
44 | Same format as the PATH environment variable's value. */ | |
45 | ||
46 | char *source_path; | |
47 | ||
48 | /* Symtab of default file for listing lines of. */ | |
49 | ||
50 | struct symtab *current_source_symtab; | |
51 | ||
52 | /* Default next line to list. */ | |
53 | ||
54 | int current_source_line; | |
55 | ||
56 | /* Line number of last line printed. Default for various commands. | |
57 | current_source_line is usually, but not always, the same as this. */ | |
58 | ||
59 | static int last_line_listed; | |
60 | ||
61 | /* First line number listed by last listing command. */ | |
62 | ||
63 | static int first_line_listed; | |
64 | ||
65 | \f | |
66 | /* Set the source file default for the "list" command, specifying a | |
67 | symtab. Sigh. Behavior specification: If it is called with a | |
68 | non-zero argument, that is the symtab to select. If it is not, | |
69 | first lookup "main"; if it exists, use the symtab and line it | |
70 | defines. If not, take the last symtab in the symtab_list (if it | |
71 | exists) or the last symtab in the psymtab_list (if *it* exists). If | |
72 | none of this works, report an error. */ | |
73 | ||
74 | void | |
75 | select_source_symtab (s) | |
76 | register struct symtab *s; | |
77 | { | |
78 | struct symtabs_and_lines sals; | |
79 | struct symtab_and_line sal; | |
80 | struct partial_symtab *ps; | |
81 | struct partial_symtab *cs_pst = 0; | |
82 | ||
83 | if (s) | |
84 | { | |
85 | current_source_symtab = s; | |
86 | current_source_line = 1; | |
87 | return; | |
88 | } | |
89 | ||
90 | /* Make the default place to list be the function `main' | |
91 | if one exists. */ | |
92 | if (lookup_symbol ("main", 0, VAR_NAMESPACE, 0, NULL)) | |
93 | { | |
94 | sals = decode_line_spec ("main", 1); | |
95 | sal = sals.sals[0]; | |
96 | free (sals.sals); | |
97 | current_source_symtab = sal.symtab; | |
98 | current_source_line = max (sal.line - (lines_to_list () - 1), 1); | |
99 | return; | |
100 | } | |
101 | ||
102 | /* All right; find the last file in the symtab list (ignoring .h's). */ | |
103 | ||
104 | if (s = symtab_list) | |
105 | { | |
106 | do | |
107 | { | |
108 | char *name = s->filename; | |
109 | int len = strlen (name); | |
110 | if (! (len > 2 && !strcmp (&name[len - 2], ".h"))) | |
111 | current_source_symtab = s; | |
112 | s = s->next; | |
113 | } | |
114 | while (s); | |
115 | current_source_line = 1; | |
116 | } | |
117 | else if (partial_symtab_list) | |
118 | { | |
119 | ps = partial_symtab_list; | |
120 | while (ps) | |
121 | { | |
122 | char *name = ps->filename; | |
123 | int len = strlen (name); | |
124 | if (! (len > 2 && !strcmp (&name[len - 2], ".h"))) | |
125 | cs_pst = ps; | |
126 | ps = ps->next; | |
127 | } | |
128 | if (cs_pst) | |
129 | if (cs_pst->readin) | |
130 | fatal ("Internal: select_source_symtab: readin pst found and no symtabs."); | |
131 | else | |
132 | current_source_symtab = PSYMTAB_TO_SYMTAB (cs_pst); | |
133 | else | |
134 | current_source_symtab = 0; | |
135 | current_source_line = 1; | |
136 | } | |
137 | } | |
138 | \f | |
139 | static void | |
140 | directories_info () | |
141 | { | |
142 | printf ("Source directories searched: %s\n", source_path); | |
143 | } | |
144 | ||
145 | /* Forget what we learned about line positions in source files, | |
146 | and which directories contain them; | |
147 | must check again now since files may be found in | |
148 | a different directory now. */ | |
149 | ||
150 | void | |
151 | forget_cached_source_info () | |
152 | { | |
153 | register struct symtab *s; | |
154 | ||
155 | for (s = symtab_list; s; s = s->next) | |
156 | { | |
157 | if (s->line_charpos != 0) | |
158 | { | |
159 | free (s->line_charpos); | |
160 | s->line_charpos = 0; | |
161 | } | |
162 | if (s->fullname != 0) | |
163 | { | |
164 | free (s->fullname); | |
165 | s->fullname = 0; | |
166 | } | |
167 | } | |
168 | } | |
169 | ||
170 | void | |
171 | init_source_path () | |
172 | { | |
173 | source_path = savestring ("$cdir:$cwd", /* strlen of it */ 10); | |
174 | forget_cached_source_info (); | |
175 | } | |
176 | ||
177 | /* Add zero or more directories to the front of the source path. */ | |
178 | ||
179 | void | |
180 | directory_command (dirname, from_tty) | |
181 | char *dirname; | |
182 | int from_tty; | |
183 | { | |
184 | dont_repeat (); | |
185 | /* FIXME, this goes to "delete dir"... */ | |
186 | if (dirname == 0) | |
187 | { | |
188 | if (query ("Reinitialize source path to empty? ", "")) | |
189 | { | |
190 | free (source_path); | |
191 | init_source_path (); | |
192 | } | |
193 | } | |
194 | else | |
195 | mod_path (dirname, from_tty, &source_path); | |
196 | if (from_tty) | |
197 | directories_info (); | |
198 | forget_cached_source_info (); | |
199 | } | |
200 | ||
201 | /* Add zero or more directories to the front of an arbitrary path. */ | |
202 | ||
203 | void | |
204 | mod_path (dirname, from_tty, which_path) | |
205 | char *dirname; | |
206 | int from_tty; | |
207 | char **which_path; | |
208 | { | |
209 | char *old = *which_path; | |
210 | int prefix = 0; | |
211 | ||
212 | if (dirname == 0) | |
213 | return; | |
214 | ||
215 | dirname = strsave (dirname); | |
216 | make_cleanup (free, dirname); | |
217 | ||
218 | do | |
219 | { | |
220 | extern char *index (); | |
221 | char *name = dirname; | |
222 | register char *p; | |
223 | struct stat st; | |
224 | ||
225 | { | |
226 | char *colon = index (name, ':'); | |
227 | char *space = index (name, ' '); | |
228 | char *tab = index (name, '\t'); | |
229 | if (colon == 0 && space == 0 && tab == 0) | |
230 | p = dirname = name + strlen (name); | |
231 | else | |
232 | { | |
233 | p = 0; | |
234 | if (colon != 0 && (p == 0 || colon < p)) | |
235 | p = colon; | |
236 | if (space != 0 && (p == 0 || space < p)) | |
237 | p = space; | |
238 | if (tab != 0 && (p == 0 || tab < p)) | |
239 | p = tab; | |
240 | dirname = p + 1; | |
241 | while (*dirname == ':' || *dirname == ' ' || *dirname == '\t') | |
242 | ++dirname; | |
243 | } | |
244 | } | |
245 | ||
246 | if (p[-1] == '/') | |
247 | /* Sigh. "foo/" => "foo" */ | |
248 | --p; | |
249 | *p = '\0'; | |
250 | ||
251 | while (p[-1] == '.') | |
252 | { | |
253 | if (p - name == 1) | |
254 | { | |
255 | /* "." => getwd (). */ | |
256 | name = current_directory; | |
257 | goto append; | |
258 | } | |
259 | else if (p[-2] == '/') | |
260 | { | |
261 | if (p - name == 2) | |
262 | { | |
263 | /* "/." => "/". */ | |
264 | *--p = '\0'; | |
265 | goto append; | |
266 | } | |
267 | else | |
268 | { | |
269 | /* "...foo/." => "...foo". */ | |
270 | p -= 2; | |
271 | *p = '\0'; | |
272 | continue; | |
273 | } | |
274 | } | |
275 | else | |
276 | break; | |
277 | } | |
278 | ||
279 | if (name[0] == '~') | |
280 | name = tilde_expand (name); | |
281 | else if (name[0] != '/' && name[0] != '$') | |
282 | name = concat (current_directory, "/", name); | |
283 | else | |
284 | name = savestring (name, p - name); | |
285 | make_cleanup (free, name); | |
286 | ||
287 | /* Unless it's a variable, check existence. */ | |
288 | if (name[0] != '$') { | |
289 | if (stat (name, &st) < 0) | |
290 | perror_with_name (name); | |
291 | if ((st.st_mode & S_IFMT) != S_IFDIR) | |
292 | error ("%s is not a directory.", name); | |
293 | } | |
294 | ||
295 | append: | |
296 | { | |
297 | register unsigned int len = strlen (name); | |
298 | ||
299 | p = *which_path; | |
300 | while (1) | |
301 | { | |
302 | if (!strncmp (p, name, len) | |
303 | && (p[len] == '\0' || p[len] == ':')) | |
304 | { | |
305 | /* Found it in the search path, remove old copy */ | |
306 | if (p > *which_path) | |
307 | p--; /* Back over leading colon */ | |
308 | if (prefix > p - *which_path) | |
309 | goto skip_dup; /* Same dir twice in one cmd */ | |
310 | strcpy (p, &p[len+1]); /* Copy from next \0 or : */ | |
311 | } | |
312 | p = index (p, ':'); | |
313 | if (p != 0) | |
314 | ++p; | |
315 | else | |
316 | break; | |
317 | } | |
318 | if (p == 0) | |
319 | { | |
320 | /* If we have already tacked on a name(s) in this command, be sure they stay on the front as we tack on some more. */ | |
321 | if (prefix) | |
322 | { | |
323 | char *temp, c; | |
324 | ||
325 | c = old[prefix]; | |
326 | old[prefix] = '\0'; | |
327 | temp = concat (old, ":", name); | |
328 | old[prefix] = c; | |
329 | *which_path = concat (temp, "", &old[prefix]); | |
330 | prefix = strlen (temp); | |
331 | free (temp); | |
332 | } | |
333 | else | |
334 | { | |
335 | *which_path = concat (name, (old[0]? ":" : old), old); | |
336 | prefix = strlen (name); | |
337 | } | |
338 | free (old); | |
339 | old = *which_path; | |
340 | } | |
341 | } | |
342 | skip_dup: ; | |
343 | } while (*dirname != '\0'); | |
344 | } | |
345 | ||
346 | ||
347 | static void | |
348 | source_info () | |
349 | { | |
350 | register struct symtab *s = current_source_symtab; | |
351 | ||
352 | if (!s) | |
353 | { | |
354 | printf("No current source file.\n"); | |
355 | return; | |
356 | } | |
357 | printf ("Current source file is %s\n", s->filename); | |
358 | if (s->dirname) | |
359 | printf ("Compilation directory is %s\n", s->dirname); | |
360 | if (s->fullname) | |
361 | printf ("Located in %s\n", s->fullname); | |
362 | if (s->nlines) | |
363 | printf ("Contains %d lines\n", s->nlines); | |
364 | ||
365 | switch (s->language) { | |
366 | case language_c: | |
367 | printf("Written in the C language.\n"); | |
368 | /* Add more cases here when -Wswitch complains... */ | |
369 | case language_unknown: | |
370 | break; | |
371 | } | |
372 | } | |
373 | ||
374 | ||
375 | \f | |
376 | /* Open a file named STRING, searching path PATH (dir names sep by colons) | |
377 | using mode MODE and protection bits PROT in the calls to open. | |
378 | If TRY_CWD_FIRST, try to open ./STRING before searching PATH. | |
379 | (ie pretend the first element of PATH is ".") | |
380 | If FILENAMED_OPENED is non-null, set it to a newly allocated string naming | |
381 | the actual file opened (this string will always start with a "/". We | |
382 | have to take special pains to avoid doubling the "/" between the directory | |
383 | and the file, sigh! Emacs gets confuzzed by this when we print the | |
384 | source file name!!! | |
385 | ||
386 | If a file is found, return the descriptor. | |
387 | Otherwise, return -1, with errno set for the last name we tried to open. */ | |
388 | ||
389 | /* >>>> This should only allow files of certain types, | |
390 | >>>> eg executable, non-directory */ | |
391 | int | |
392 | openp (path, try_cwd_first, string, mode, prot, filename_opened) | |
393 | char *path; | |
394 | int try_cwd_first; | |
395 | char *string; | |
396 | int mode; | |
397 | int prot; | |
398 | char **filename_opened; | |
399 | { | |
400 | register int fd; | |
401 | register char *filename; | |
402 | register char *p, *p1; | |
403 | register int len; | |
404 | int alloclen; | |
405 | ||
406 | if (!path) | |
407 | path = "."; | |
408 | ||
409 | /* ./foo => foo */ | |
410 | while (string[0] == '.' && string[1] == '/') | |
411 | string += 2; | |
412 | ||
413 | if (try_cwd_first || string[0] == '/') | |
414 | { | |
415 | filename = string; | |
416 | fd = open (filename, mode, prot); | |
417 | if (fd >= 0 || string[0] == '/') | |
418 | goto done; | |
419 | } | |
420 | ||
421 | alloclen = strlen (path) + strlen (string) + 2; | |
422 | filename = (char *) alloca (alloclen); | |
423 | fd = -1; | |
424 | for (p = path; p; p = p1 ? p1 + 1 : 0) | |
425 | { | |
426 | p1 = (char *) index (p, ':'); | |
427 | if (p1) | |
428 | len = p1 - p; | |
429 | else | |
430 | len = strlen (p); | |
431 | ||
432 | if (len == 4 && p[0] == '$' && p[1] == 'c' | |
433 | && p[2] == 'w' && p[3] == 'd') { | |
434 | /* Name is $cwd -- insert current directory name instead. */ | |
435 | int newlen; | |
436 | ||
437 | /* First, realloc the filename buffer if too short. */ | |
438 | len = strlen (current_directory); | |
439 | newlen = len + strlen (string) + 2; | |
440 | if (newlen > alloclen) { | |
441 | alloclen = newlen; | |
442 | filename = (char *) alloca (alloclen); | |
443 | } | |
444 | strcpy (filename, current_directory); | |
445 | } else { | |
446 | /* Normal file name in path -- just use it. */ | |
447 | strncpy (filename, p, len); | |
448 | filename[len] = 0; | |
449 | } | |
450 | ||
451 | /* Beware the // my son, the Emacs barfs, the botch that catch... */ | |
452 | while (len > 1 && filename[len-1] == '/') | |
453 | filename[--len] = 0; | |
454 | strcat (filename+len, "/"); | |
455 | strcat (filename, string); | |
456 | ||
457 | fd = open (filename, mode, prot); | |
458 | if (fd >= 0) break; | |
459 | } | |
460 | ||
461 | done: | |
462 | if (filename_opened) | |
463 | if (fd < 0) | |
464 | *filename_opened = (char *) 0; | |
465 | else if (filename[0] == '/') | |
466 | *filename_opened = savestring (filename, strlen (filename)); | |
467 | else | |
468 | { | |
469 | /* Beware the // my son, the Emacs barfs, the botch that catch... */ | |
470 | ||
471 | *filename_opened = concat (current_directory, | |
472 | '/' == current_directory[strlen(current_directory)-1]? "": "/", | |
473 | filename); | |
474 | } | |
475 | ||
476 | return fd; | |
477 | } | |
478 | ||
479 | /* Open a source file given a symtab S. Returns a file descriptor | |
480 | or negative number for error. */ | |
481 | int | |
482 | open_source_file (s) | |
483 | struct symtab *s; | |
484 | { | |
485 | char *path = source_path; | |
486 | char *p; | |
487 | int result; | |
488 | ||
489 | /* Quick way out if we already know its full name */ | |
490 | if (s->fullname) | |
491 | { | |
492 | result = open (s->fullname, O_RDONLY); | |
493 | if (result >= 0) | |
494 | return result; | |
495 | /* Didn't work -- free old one, try again. */ | |
496 | free (s->fullname); | |
497 | s->fullname = NULL; | |
498 | } | |
499 | ||
500 | if (s->dirname != NULL) | |
501 | { | |
502 | /* Replace a path entry of $cdir with the compilation directory name */ | |
503 | #define cdir_len 5 | |
504 | p = strstr (source_path, "$cdir"); | |
505 | if (p && (p == path || p[-1] == ':') | |
506 | && (p[cdir_len] == ':' || p[cdir_len] == '\0')) { | |
507 | int len; | |
508 | ||
509 | path = (char *) | |
510 | alloca (strlen (source_path) + 1 + strlen (s->dirname) + 1); | |
511 | len = p - source_path; | |
512 | strncpy (path, source_path, len); /* Before $cdir */ | |
513 | strcpy (path + len, s->dirname); /* new stuff */ | |
514 | strcat (path + len, source_path + len + cdir_len); /* After $cdir */ | |
515 | } | |
516 | } | |
517 | ||
518 | return openp (path, 0, s->filename, O_RDONLY, 0, &s->fullname); | |
519 | } | |
520 | ||
521 | \f | |
522 | /* Create and initialize the table S->line_charpos that records | |
523 | the positions of the lines in the source file, which is assumed | |
524 | to be open on descriptor DESC. | |
525 | All set S->nlines to the number of such lines. */ | |
526 | ||
527 | static void | |
528 | find_source_lines (s, desc) | |
529 | struct symtab *s; | |
530 | int desc; | |
531 | { | |
532 | struct stat st; | |
533 | register char *data, *p, *end; | |
534 | int nlines = 0; | |
535 | int lines_allocated = 1000; | |
536 | int *line_charpos = (int *) xmalloc (lines_allocated * sizeof (int)); | |
537 | ||
538 | if (fstat (desc, &st) < 0) | |
539 | perror_with_name (s->filename); | |
540 | if (exec_bfd && bfd_get_mtime(exec_bfd) < st.st_mtime) | |
541 | printf ("Source file is more recent than executable.\n"); | |
542 | ||
543 | #if defined (BROKEN_LARGE_ALLOCA) | |
544 | data = (char *) xmalloc (st.st_size); | |
545 | make_cleanup (free, data); | |
546 | #else | |
547 | data = (char *) alloca (st.st_size); | |
548 | #endif | |
549 | if (myread (desc, data, st.st_size) < 0) | |
550 | perror_with_name (s->filename); | |
551 | end = data + st.st_size; | |
552 | p = data; | |
553 | line_charpos[0] = 0; | |
554 | nlines = 1; | |
555 | while (p != end) | |
556 | { | |
557 | if (*p++ == '\n' | |
558 | /* A newline at the end does not start a new line. */ | |
559 | && p != end) | |
560 | { | |
561 | if (nlines == lines_allocated) | |
562 | { | |
563 | lines_allocated *= 2; | |
564 | line_charpos = (int *) xrealloc (line_charpos, | |
565 | sizeof (int) * lines_allocated); | |
566 | } | |
567 | line_charpos[nlines++] = p - data; | |
568 | } | |
569 | } | |
570 | s->nlines = nlines; | |
571 | s->line_charpos = (int *) xrealloc (line_charpos, nlines * sizeof (int)); | |
572 | } | |
573 | ||
574 | /* Return the character position of a line LINE in symtab S. | |
575 | Return 0 if anything is invalid. */ | |
576 | ||
577 | int | |
578 | source_line_charpos (s, line) | |
579 | struct symtab *s; | |
580 | int line; | |
581 | { | |
582 | if (!s) return 0; | |
583 | if (!s->line_charpos || line <= 0) return 0; | |
584 | if (line > s->nlines) | |
585 | line = s->nlines; | |
586 | return s->line_charpos[line - 1]; | |
587 | } | |
588 | ||
589 | /* Return the line number of character position POS in symtab S. */ | |
590 | ||
591 | int | |
592 | source_charpos_line (s, chr) | |
593 | register struct symtab *s; | |
594 | register int chr; | |
595 | { | |
596 | register int line = 0; | |
597 | register int *lnp; | |
598 | ||
599 | if (s == 0 || s->line_charpos == 0) return 0; | |
600 | lnp = s->line_charpos; | |
601 | /* Files are usually short, so sequential search is Ok */ | |
602 | while (line < s->nlines && *lnp <= chr) | |
603 | { | |
604 | line++; | |
605 | lnp++; | |
606 | } | |
607 | if (line >= s->nlines) | |
608 | line = s->nlines; | |
609 | return line; | |
610 | } | |
611 | \f | |
612 | /* Get full pathname and line number positions for a symtab. | |
613 | Return nonzero if line numbers may have changed. | |
614 | Set *FULLNAME to actual name of the file as found by `openp', | |
615 | or to 0 if the file is not found. */ | |
616 | ||
617 | int | |
618 | get_filename_and_charpos (s, fullname) | |
619 | struct symtab *s; | |
620 | char **fullname; | |
621 | { | |
622 | register int desc, linenums_changed = 0; | |
623 | ||
624 | desc = open_source_file (s); | |
625 | if (desc < 0) | |
626 | { | |
627 | if (fullname) | |
628 | *fullname = NULL; | |
629 | return 0; | |
630 | } | |
631 | if (fullname) | |
632 | *fullname = s->fullname; | |
633 | if (s->line_charpos == 0) linenums_changed = 1; | |
634 | if (linenums_changed) find_source_lines (s, desc); | |
635 | close (desc); | |
636 | return linenums_changed; | |
637 | } | |
638 | ||
639 | /* Print text describing the full name of the source file S | |
640 | and the line number LINE and its corresponding character position. | |
641 | The text starts with two Ctrl-z so that the Emacs-GDB interface | |
642 | can easily find it. | |
643 | ||
644 | MID_STATEMENT is nonzero if the PC is not at the beginning of that line. | |
645 | ||
646 | Return 1 if successful, 0 if could not find the file. */ | |
647 | ||
648 | int | |
649 | identify_source_line (s, line, mid_statement) | |
650 | struct symtab *s; | |
651 | int line; | |
652 | int mid_statement; | |
653 | { | |
654 | if (s->line_charpos == 0) | |
655 | get_filename_and_charpos (s, (char **)NULL); | |
656 | if (s->fullname == 0) | |
657 | return 0; | |
658 | printf ("\032\032%s:%d:%d:%s:0x%x\n", s->fullname, | |
659 | line, s->line_charpos[line - 1], | |
660 | mid_statement ? "middle" : "beg", | |
661 | get_frame_pc (get_current_frame())); | |
662 | current_source_line = line; | |
663 | first_line_listed = line; | |
664 | last_line_listed = line; | |
665 | current_source_symtab = s; | |
666 | return 1; | |
667 | } | |
668 | \f | |
669 | /* Print source lines from the file of symtab S, | |
670 | starting with line number LINE and stopping before line number STOPLINE. */ | |
671 | ||
672 | void | |
673 | print_source_lines (s, line, stopline, noerror) | |
674 | struct symtab *s; | |
675 | int line, stopline; | |
676 | int noerror; | |
677 | { | |
678 | register int c; | |
679 | register int desc; | |
680 | register FILE *stream; | |
681 | int nlines = stopline - line; | |
682 | ||
683 | /* Regardless of whether we can open the file, set current_source_symtab. */ | |
684 | current_source_symtab = s; | |
685 | current_source_line = line; | |
686 | first_line_listed = line; | |
687 | ||
688 | desc = open_source_file (s); | |
689 | if (desc < 0) | |
690 | { | |
691 | if (! noerror) { | |
692 | char *name = alloca (strlen (s->filename) + 100); | |
693 | sprintf (name, "%s:%d", s->filename, line); | |
694 | print_sys_errmsg (name, errno); | |
695 | } | |
696 | return; | |
697 | } | |
698 | ||
699 | if (s->line_charpos == 0) | |
700 | find_source_lines (s, desc); | |
701 | ||
702 | if (line < 1 || line > s->nlines) | |
703 | { | |
704 | close (desc); | |
705 | error ("Line number %d out of range; %s has %d lines.", | |
706 | line, s->filename, s->nlines); | |
707 | } | |
708 | ||
709 | if (lseek (desc, s->line_charpos[line - 1], 0) < 0) | |
710 | { | |
711 | close (desc); | |
712 | perror_with_name (s->filename); | |
713 | } | |
714 | ||
715 | stream = fdopen (desc, "r"); | |
716 | clearerr (stream); | |
717 | ||
718 | while (nlines-- > 0) | |
719 | { | |
720 | c = fgetc (stream); | |
721 | if (c == EOF) break; | |
722 | last_line_listed = current_source_line; | |
723 | printf_filtered ("%d\t", current_source_line++); | |
724 | do | |
725 | { | |
726 | if (c < 040 && c != '\t' && c != '\n') | |
727 | printf_filtered ("^%c", c + 0100); | |
728 | else if (c == 0177) | |
729 | printf_filtered ("^?"); | |
730 | else | |
731 | printf_filtered ("%c", c); | |
732 | } while (c != '\n' && (c = fgetc (stream)) >= 0); | |
733 | } | |
734 | ||
735 | fclose (stream); | |
736 | } | |
737 | \f | |
738 | ||
739 | ||
740 | /* | |
741 | C++ | |
742 | Print a list of files and line numbers which a user may choose from | |
743 | in order to list a function which was specified ambiguously | |
744 | (as with `list classname::overloadedfuncname', for example). | |
745 | The vector in SALS provides the filenames and line numbers. | |
746 | */ | |
747 | static void | |
748 | ambiguous_line_spec (sals) | |
749 | struct symtabs_and_lines *sals; | |
750 | { | |
751 | int i; | |
752 | ||
753 | for (i = 0; i < sals->nelts; ++i) | |
754 | printf("file: \"%s\", line number: %d\n", | |
755 | sals->sals[i].symtab->filename, sals->sals[i].line); | |
756 | } | |
757 | ||
758 | ||
759 | static void | |
760 | list_command (arg, from_tty) | |
761 | char *arg; | |
762 | int from_tty; | |
763 | { | |
764 | struct symtabs_and_lines sals, sals_end; | |
765 | struct symtab_and_line sal, sal_end; | |
766 | struct symbol *sym; | |
767 | char *arg1; | |
768 | int no_end = 1; | |
769 | int dummy_end = 0; | |
770 | int dummy_beg = 0; | |
771 | int linenum_beg = 0; | |
772 | char *p; | |
773 | ||
774 | if (symtab_list == 0 && partial_symtab_list == 0) | |
775 | error ("No symbol table is loaded. Use the \"symbol-file\" command."); | |
776 | ||
777 | /* Pull in a current source symtab if necessary */ | |
778 | if (current_source_symtab == 0 && | |
779 | (arg == 0 || arg[0] == '+' || arg[0] == '-')) | |
780 | select_source_symtab (0); | |
781 | ||
782 | /* "l" or "l +" lists next ten lines. */ | |
783 | ||
784 | if (arg == 0 || !strcmp (arg, "+")) | |
785 | { | |
786 | if (current_source_symtab == 0) | |
787 | error ("No default source file yet. Do \"help list\"."); | |
788 | print_source_lines (current_source_symtab, current_source_line, | |
789 | current_source_line + lines_to_list (), 0); | |
790 | return; | |
791 | } | |
792 | ||
793 | /* "l -" lists previous ten lines, the ones before the ten just listed. */ | |
794 | if (!strcmp (arg, "-")) | |
795 | { | |
796 | if (current_source_symtab == 0) | |
797 | error ("No default source file yet. Do \"help list\"."); | |
798 | print_source_lines (current_source_symtab, | |
799 | max (first_line_listed - lines_to_list (), 1), | |
800 | first_line_listed, 0); | |
801 | return; | |
802 | } | |
803 | ||
804 | /* Now if there is only one argument, decode it in SAL | |
805 | and set NO_END. | |
806 | If there are two arguments, decode them in SAL and SAL_END | |
807 | and clear NO_END; however, if one of the arguments is blank, | |
808 | set DUMMY_BEG or DUMMY_END to record that fact. */ | |
809 | ||
810 | arg1 = arg; | |
811 | if (*arg1 == ',') | |
812 | dummy_beg = 1; | |
813 | else | |
814 | { | |
815 | sals = decode_line_1 (&arg1, 0, 0, 0); | |
816 | ||
817 | if (! sals.nelts) return; /* C++ */ | |
818 | if (sals.nelts > 1) | |
819 | { | |
820 | ambiguous_line_spec (&sals); | |
821 | free (sals.sals); | |
822 | return; | |
823 | } | |
824 | ||
825 | sal = sals.sals[0]; | |
826 | free (sals.sals); | |
827 | } | |
828 | ||
829 | /* Record whether the BEG arg is all digits. */ | |
830 | ||
831 | for (p = arg; p != arg1 && *p >= '0' && *p <= '9'; p++); | |
832 | linenum_beg = (p == arg1); | |
833 | ||
834 | while (*arg1 == ' ' || *arg1 == '\t') | |
835 | arg1++; | |
836 | if (*arg1 == ',') | |
837 | { | |
838 | no_end = 0; | |
839 | arg1++; | |
840 | while (*arg1 == ' ' || *arg1 == '\t') | |
841 | arg1++; | |
842 | if (*arg1 == 0) | |
843 | dummy_end = 1; | |
844 | else | |
845 | { | |
846 | if (dummy_beg) | |
847 | sals_end = decode_line_1 (&arg1, 0, 0, 0); | |
848 | else | |
849 | sals_end = decode_line_1 (&arg1, 0, sal.symtab, sal.line); | |
850 | if (sals_end.nelts == 0) | |
851 | return; | |
852 | if (sals_end.nelts > 1) | |
853 | { | |
854 | ambiguous_line_spec (&sals_end); | |
855 | free (sals_end.sals); | |
856 | return; | |
857 | } | |
858 | sal_end = sals_end.sals[0]; | |
859 | free (sals_end.sals); | |
860 | } | |
861 | } | |
862 | ||
863 | if (*arg1) | |
864 | error ("Junk at end of line specification."); | |
865 | ||
866 | if (!no_end && !dummy_beg && !dummy_end | |
867 | && sal.symtab != sal_end.symtab) | |
868 | error ("Specified start and end are in different files."); | |
869 | if (dummy_beg && dummy_end) | |
870 | error ("Two empty args do not say what lines to list."); | |
871 | ||
872 | /* if line was specified by address, | |
873 | first print exactly which line, and which file. | |
874 | In this case, sal.symtab == 0 means address is outside | |
875 | of all known source files, not that user failed to give a filename. */ | |
876 | if (*arg == '*') | |
877 | { | |
878 | if (sal.symtab == 0) | |
879 | error ("No source file for address 0x%x.", sal.pc); | |
880 | sym = find_pc_function (sal.pc); | |
881 | if (sym) | |
882 | printf ("0x%x is in %s (%s, line %d).\n", | |
883 | sal.pc, SYMBOL_NAME (sym), sal.symtab->filename, sal.line); | |
884 | else | |
885 | printf ("0x%x is in %s, line %d.\n", | |
886 | sal.pc, sal.symtab->filename, sal.line); | |
887 | } | |
888 | ||
889 | /* If line was not specified by just a line number, | |
890 | and it does not imply a symtab, it must be an undebuggable symbol | |
891 | which means no source code. */ | |
892 | ||
893 | if (! linenum_beg && sal.symtab == 0) | |
894 | error ("No line number known for %s.", arg); | |
895 | ||
896 | /* If this command is repeated with RET, | |
897 | turn it into the no-arg variant. */ | |
898 | ||
899 | if (from_tty) | |
900 | *arg = 0; | |
901 | ||
902 | if (dummy_beg && sal_end.symtab == 0) | |
903 | error ("No default source file yet. Do \"help list\"."); | |
904 | if (dummy_beg) | |
905 | print_source_lines (sal_end.symtab, | |
906 | max (sal_end.line - (lines_to_list () - 1), 1), | |
907 | sal_end.line + 1, 0); | |
908 | else if (sal.symtab == 0) | |
909 | error ("No default source file yet. Do \"help list\"."); | |
910 | else if (no_end) | |
911 | print_source_lines (sal.symtab, | |
912 | max (sal.line - (lines_to_list () / 2), 1), | |
913 | sal.line + 5, 0); | |
914 | else | |
915 | print_source_lines (sal.symtab, sal.line, | |
916 | (dummy_end | |
917 | ? sal.line + lines_to_list () | |
918 | : sal_end.line + 1), | |
919 | 0); | |
920 | } | |
921 | \f | |
922 | /* Print info on range of pc's in a specified line. */ | |
923 | ||
924 | static void | |
925 | line_info (arg, from_tty) | |
926 | char *arg; | |
927 | int from_tty; | |
928 | { | |
929 | struct symtabs_and_lines sals; | |
930 | struct symtab_and_line sal; | |
931 | CORE_ADDR start_pc, end_pc; | |
932 | int i; | |
933 | ||
934 | if (arg == 0) | |
935 | { | |
936 | sal.symtab = current_source_symtab; | |
937 | sal.line = last_line_listed; | |
938 | sals.nelts = 1; | |
939 | sals.sals = (struct symtab_and_line *) | |
940 | xmalloc (sizeof (struct symtab_and_line)); | |
941 | sals.sals[0] = sal; | |
942 | } | |
943 | else | |
944 | { | |
945 | sals = decode_line_spec_1 (arg, 0); | |
946 | ||
947 | /* If this command is repeated with RET, | |
948 | turn it into the no-arg variant. */ | |
949 | if (from_tty) | |
950 | *arg = 0; | |
951 | } | |
952 | ||
953 | /* C++ More than one line may have been specified, as when the user | |
954 | specifies an overloaded function name. Print info on them all. */ | |
955 | for (i = 0; i < sals.nelts; i++) | |
956 | { | |
957 | sal = sals.sals[i]; | |
958 | ||
959 | if (sal.symtab == 0) | |
960 | error ("No source file specified."); | |
961 | ||
962 | if (sal.line > 0 | |
963 | && find_line_pc_range (sal.symtab, sal.line, &start_pc, &end_pc)) | |
964 | { | |
965 | if (start_pc == end_pc) | |
966 | printf ("Line %d of \"%s\" is at pc 0x%x but contains no code.\n", | |
967 | sal.line, sal.symtab->filename, start_pc); | |
968 | else | |
969 | printf ("Line %d of \"%s\" starts at pc 0x%x and ends at 0x%x.\n", | |
970 | sal.line, sal.symtab->filename, start_pc, end_pc); | |
971 | /* x/i should display this line's code. */ | |
972 | set_next_address (start_pc); | |
973 | /* Repeating "info line" should do the following line. */ | |
974 | last_line_listed = sal.line + 1; | |
975 | } | |
976 | else | |
977 | printf ("Line number %d is out of range for \"%s\".\n", | |
978 | sal.line, sal.symtab->filename); | |
979 | } | |
980 | } | |
981 | \f | |
982 | /* Commands to search the source file for a regexp. */ | |
983 | ||
984 | static void | |
985 | forward_search_command (regex, from_tty) | |
986 | char *regex; | |
987 | int from_tty; | |
988 | { | |
989 | register int c; | |
990 | register int desc; | |
991 | register FILE *stream; | |
992 | int line = last_line_listed + 1; | |
993 | char *msg; | |
994 | ||
995 | msg = (char *) re_comp (regex); | |
996 | if (msg) | |
997 | error (msg); | |
998 | ||
999 | if (current_source_symtab == 0) | |
1000 | select_source_symtab (0); | |
1001 | ||
1002 | /* Search from last_line_listed+1 in current_source_symtab */ | |
1003 | ||
1004 | desc = open_source_file (current_source_symtab); | |
1005 | if (desc < 0) | |
1006 | perror_with_name (current_source_symtab->filename); | |
1007 | ||
1008 | if (current_source_symtab->line_charpos == 0) | |
1009 | find_source_lines (current_source_symtab, desc); | |
1010 | ||
1011 | if (line < 1 || line > current_source_symtab->nlines) | |
1012 | { | |
1013 | close (desc); | |
1014 | error ("Expression not found"); | |
1015 | } | |
1016 | ||
1017 | if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) | |
1018 | { | |
1019 | close (desc); | |
1020 | perror_with_name (current_source_symtab->filename); | |
1021 | } | |
1022 | ||
1023 | stream = fdopen (desc, "r"); | |
1024 | clearerr (stream); | |
1025 | while (1) { | |
1026 | char buf[4096]; /* Should be reasonable??? */ | |
1027 | register char *p = buf; | |
1028 | ||
1029 | c = fgetc (stream); | |
1030 | if (c == EOF) | |
1031 | break; | |
1032 | do { | |
1033 | *p++ = c; | |
1034 | } while (c != '\n' && (c = fgetc (stream)) >= 0); | |
1035 | ||
1036 | /* we now have a source line in buf, null terminate and match */ | |
1037 | *p = 0; | |
1038 | if (re_exec (buf) > 0) | |
1039 | { | |
1040 | /* Match! */ | |
1041 | fclose (stream); | |
1042 | print_source_lines (current_source_symtab, | |
1043 | line, line+1, 0); | |
1044 | current_source_line = max (line - lines_to_list () / 2, 1); | |
1045 | return; | |
1046 | } | |
1047 | line++; | |
1048 | } | |
1049 | ||
1050 | printf ("Expression not found\n"); | |
1051 | fclose (stream); | |
1052 | } | |
1053 | ||
1054 | static void | |
1055 | reverse_search_command (regex, from_tty) | |
1056 | char *regex; | |
1057 | int from_tty; | |
1058 | { | |
1059 | register int c; | |
1060 | register int desc; | |
1061 | register FILE *stream; | |
1062 | int line = last_line_listed - 1; | |
1063 | char *msg; | |
1064 | ||
1065 | msg = (char *) re_comp (regex); | |
1066 | if (msg) | |
1067 | error (msg); | |
1068 | ||
1069 | if (current_source_symtab == 0) | |
1070 | select_source_symtab (0); | |
1071 | ||
1072 | /* Search from last_line_listed-1 in current_source_symtab */ | |
1073 | ||
1074 | desc = open_source_file (current_source_symtab); | |
1075 | if (desc < 0) | |
1076 | perror_with_name (current_source_symtab->filename); | |
1077 | ||
1078 | if (current_source_symtab->line_charpos == 0) | |
1079 | find_source_lines (current_source_symtab, desc); | |
1080 | ||
1081 | if (line < 1 || line > current_source_symtab->nlines) | |
1082 | { | |
1083 | close (desc); | |
1084 | error ("Expression not found"); | |
1085 | } | |
1086 | ||
1087 | if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) | |
1088 | { | |
1089 | close (desc); | |
1090 | perror_with_name (current_source_symtab->filename); | |
1091 | } | |
1092 | ||
1093 | stream = fdopen (desc, "r"); | |
1094 | clearerr (stream); | |
1095 | while (line > 1) | |
1096 | { | |
1097 | char buf[4096]; /* Should be reasonable??? */ | |
1098 | register char *p = buf; | |
1099 | ||
1100 | c = fgetc (stream); | |
1101 | if (c == EOF) | |
1102 | break; | |
1103 | do { | |
1104 | *p++ = c; | |
1105 | } while (c != '\n' && (c = fgetc (stream)) >= 0); | |
1106 | ||
1107 | /* We now have a source line in buf; null terminate and match. */ | |
1108 | *p = 0; | |
1109 | if (re_exec (buf) > 0) | |
1110 | { | |
1111 | /* Match! */ | |
1112 | fclose (stream); | |
1113 | print_source_lines (current_source_symtab, | |
1114 | line, line+1, 0); | |
1115 | current_source_line = max (line - lines_to_list () / 2, 1); | |
1116 | return; | |
1117 | } | |
1118 | line--; | |
1119 | if (fseek (stream, current_source_symtab->line_charpos[line - 1], 0) < 0) | |
1120 | { | |
1121 | fclose (stream); | |
1122 | perror_with_name (current_source_symtab->filename); | |
1123 | } | |
1124 | } | |
1125 | ||
1126 | printf ("Expression not found\n"); | |
1127 | fclose (stream); | |
1128 | return; | |
1129 | } | |
1130 | \f | |
1131 | void | |
1132 | _initialize_source () | |
1133 | { | |
1134 | current_source_symtab = 0; | |
1135 | init_source_path (); | |
1136 | ||
1137 | add_com ("directory", class_files, directory_command, | |
1138 | "Add directory DIR to beginning of search path for source files.\n\ | |
1139 | Forget cached info on source file locations and line positions.\n\ | |
1140 | DIR can also be $cwd for the current working directory, or $cdir for the\n\ | |
1141 | directory in which the source file was compiled into object code.\n\ | |
1142 | With no argument, reset the search path to $cdir:$cwd, the default."); | |
1143 | ||
1144 | add_info ("directories", directories_info, | |
1145 | "Current search path for finding source files.\n\ | |
1146 | $cwd in the path means the current working directory.\n\ | |
1147 | $cdir in the path means the compilation directory of the source file."); | |
1148 | ||
1149 | add_info ("source", source_info, | |
1150 | "Information about the current source file."); | |
1151 | ||
1152 | add_info ("line", line_info, | |
1153 | "Core addresses of the code for a source line.\n\ | |
1154 | Line can be specified as\n\ | |
1155 | LINENUM, to list around that line in current file,\n\ | |
1156 | FILE:LINENUM, to list around that line in that file,\n\ | |
1157 | FUNCTION, to list around beginning of that function,\n\ | |
1158 | FILE:FUNCTION, to distinguish among like-named static functions.\n\ | |
1159 | Default is to describe the last source line that was listed.\n\n\ | |
1160 | This sets the default address for \"x\" to the line's first instruction\n\ | |
1161 | so that \"x/i\" suffices to start examining the machine code.\n\ | |
1162 | The address is also stored as the value of \"$_\"."); | |
1163 | ||
1164 | add_com ("forward-search", class_files, forward_search_command, | |
1165 | "Search for regular expression (see regex(3)) from last line listed."); | |
1166 | add_com_alias ("search", "forward-search", class_files, 0); | |
1167 | ||
1168 | add_com ("reverse-search", class_files, reverse_search_command, | |
1169 | "Search backward for regular expression (see regex(3)) from last line listed."); | |
1170 | ||
1171 | add_com ("list", class_files, list_command, | |
1172 | "List specified function or line.\n\ | |
1173 | With no argument, lists ten more lines after or around previous listing.\n\ | |
1174 | \"list -\" lists the ten lines before a previous ten-line listing.\n\ | |
1175 | One argument specifies a line, and ten lines are listed around that line.\n\ | |
1176 | Two arguments with comma between specify starting and ending lines to list.\n\ | |
1177 | Lines can be specified in these ways:\n\ | |
1178 | LINENUM, to list around that line in current file,\n\ | |
1179 | FILE:LINENUM, to list around that line in that file,\n\ | |
1180 | FUNCTION, to list around beginning of that function,\n\ | |
1181 | FILE:FUNCTION, to distinguish among like-named static functions.\n\ | |
1182 | *ADDRESS, to list around the line containing that address.\n\ | |
1183 | With two args if one is empty it stands for ten lines away from the other arg."); | |
1184 | add_com_alias ("l", "list", class_files, 0); | |
1185 | } | |
1186 |