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7b4ac7e1 | 1 | /* List lines of source files for GDB, the GNU debugger. |
4187119d | 2 | Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc. |
7b4ac7e1 | 3 | |
4187119d | 4 | This file is part of GDB. |
7b4ac7e1 | 5 | |
4187119d | 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. | |
7b4ac7e1 | 10 | |
4187119d | 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. */ | |
7b4ac7e1 | 19 | |
7a67dd45 | 20 | #include <stdio.h> |
e91b87a3 | 21 | #include "defs.h" |
22 | #include "symtab.h" | |
23 | #include "param.h" | |
24 | ||
25 | #ifdef USG | |
26 | #include <sys/types.h> | |
27 | #include <fcntl.h> | |
28 | #endif | |
29 | ||
7b4ac7e1 | 30 | #include <sys/param.h> |
31 | #include <sys/stat.h> | |
32 | #include <sys/file.h> | |
7b4ac7e1 | 33 | |
34 | /* Path of directories to search for source files. | |
35 | Same format as the PATH environment variable's value. */ | |
36 | ||
37 | static char *source_path; | |
38 | ||
39 | /* Symtab of default file for listing lines of. */ | |
40 | ||
41 | struct symtab *current_source_symtab; | |
42 | ||
43 | /* Default next line to list. */ | |
44 | ||
45 | int current_source_line; | |
46 | ||
632ea0cc | 47 | /* Line number of last line printed. Default for various commands. |
48 | current_source_line is usually, but not always, the same as this. */ | |
7b4ac7e1 | 49 | |
632ea0cc | 50 | static int last_line_listed; |
7b4ac7e1 | 51 | |
52 | /* First line number listed by last listing command. */ | |
53 | ||
54 | static int first_line_listed; | |
55 | ||
7b4ac7e1 | 56 | \f |
e91b87a3 | 57 | struct symtab *psymtab_to_symtab (); |
58 | ||
4187119d | 59 | /* Set the source file default for the "list" command, specifying a |
60 | symtab. Sigh. Behaivior specification: If it is called with a | |
61 | non-zero argument, that is the symtab to select. If it is not, | |
62 | first lookup "main"; if it exists, use the symtab and line it | |
63 | defines. If not, take the last symtab in the symtab_list (if it | |
64 | exists) or the last symtab in the psytab_list (if *it* exists). If | |
65 | none of this works, report an error. */ | |
7b4ac7e1 | 66 | |
67 | void | |
68 | select_source_symtab (s) | |
69 | register struct symtab *s; | |
70 | { | |
e91b87a3 | 71 | struct symtabs_and_lines sals; |
72 | struct symtab_and_line sal; | |
73 | struct partial_symtab *ps, *cs_pst; | |
74 | ||
4187119d | 75 | if (s) |
76 | { | |
77 | current_source_symtab = s; | |
78 | current_source_line = 1; | |
79 | return; | |
80 | } | |
81 | ||
e91b87a3 | 82 | /* Make the default place to list be the function `main' |
83 | if one exists. */ | |
84 | if (lookup_symbol ("main", 0, VAR_NAMESPACE, 0)) | |
85 | { | |
86 | sals = decode_line_spec ("main", 1); | |
87 | sal = sals.sals[0]; | |
88 | free (sals.sals); | |
89 | current_source_symtab = sal.symtab; | |
4187119d | 90 | current_source_line = max (sal.line - 9, 1); |
e91b87a3 | 91 | return; |
92 | } | |
93 | ||
4187119d | 94 | /* All right; find the last file in the symtab list (ignoring .h's). */ |
95 | ||
96 | if (s = symtab_list) | |
7b4ac7e1 | 97 | { |
7b4ac7e1 | 98 | do |
99 | { | |
100 | char *name = s->filename; | |
101 | int len = strlen (name); | |
102 | if (! (len > 2 && !strcmp (&name[len - 2], ".h"))) | |
103 | current_source_symtab = s; | |
104 | s = s->next; | |
105 | } | |
106 | while (s); | |
107 | current_source_line = 1; | |
108 | } | |
4187119d | 109 | else if (partial_symtab_list) |
e91b87a3 | 110 | { |
111 | ps = partial_symtab_list; | |
112 | while (ps) | |
113 | { | |
114 | char *name = ps->filename; | |
115 | int len = strlen (name); | |
116 | if (! (len > 2 && !strcmp (&name[len - 2], ".h"))) | |
117 | cs_pst = ps; | |
118 | ps = ps->next; | |
119 | } | |
120 | if (cs_pst) | |
4187119d | 121 | if (cs_pst->readin) |
122 | fatal ("Internal: select_source_symtab: readin pst found and no symtabs."); | |
123 | else | |
124 | current_source_symtab = psymtab_to_symtab (cs_pst); | |
e91b87a3 | 125 | else |
126 | current_source_symtab = 0; | |
127 | current_source_line = 1; | |
128 | } | |
7b4ac7e1 | 129 | } |
130 | \f | |
131 | static void | |
132 | directories_info () | |
133 | { | |
134 | printf ("Source directories searched: %s\n", source_path); | |
135 | } | |
136 | ||
3bf57d21 | 137 | void |
7b4ac7e1 | 138 | init_source_path () |
139 | { | |
140 | register struct symtab *s; | |
7b4ac7e1 | 141 | |
3bf57d21 | 142 | source_path = savestring (current_directory, strlen (current_directory)); |
7b4ac7e1 | 143 | |
144 | /* Forget what we learned about line positions in source files; | |
145 | must check again now since files may be found in | |
146 | a different directory now. */ | |
147 | for (s = symtab_list; s; s = s->next) | |
148 | if (s->line_charpos != 0) | |
149 | { | |
150 | free (s->line_charpos); | |
151 | s->line_charpos = 0; | |
152 | } | |
153 | } | |
154 | ||
155 | void | |
156 | directory_command (dirname, from_tty) | |
157 | char *dirname; | |
158 | int from_tty; | |
159 | { | |
160 | char *old = source_path; | |
161 | ||
4187119d | 162 | dont_repeat (); |
163 | ||
7b4ac7e1 | 164 | if (dirname == 0) |
165 | { | |
3bf57d21 | 166 | if (query ("Reinitialize source path to %s? ", current_directory)) |
7b4ac7e1 | 167 | { |
168 | init_source_path (); | |
169 | free (old); | |
170 | } | |
171 | } | |
172 | else | |
173 | { | |
4187119d | 174 | dirname = tilde_expand (dirname); |
175 | make_cleanup (free, dirname); | |
176 | ||
177 | do | |
7b4ac7e1 | 178 | { |
4187119d | 179 | extern char *index (); |
180 | char *name = dirname; | |
181 | register char *p; | |
182 | struct stat st; | |
183 | ||
184 | { | |
185 | char *colon = index (name, ':'); | |
186 | char *space = index (name, ' '); | |
187 | char *tab = index (name, '\t'); | |
188 | if (colon == 0 && space == 0 && tab == 0) | |
189 | p = dirname = name + strlen (name); | |
190 | else | |
191 | { | |
192 | p = 0; | |
193 | if (colon != 0 && (p == 0 || colon < p)) | |
194 | p = colon; | |
195 | if (space != 0 && (p == 0 || space < p)) | |
196 | p = space; | |
197 | if (tab != 0 && (p == 0 || tab < p)) | |
198 | p = tab; | |
199 | dirname = p + 1; | |
200 | while (*dirname == ':' || *dirname == ' ' || *dirname == '\t') | |
201 | ++dirname; | |
202 | } | |
203 | } | |
204 | ||
205 | if (p[-1] == '/') | |
206 | /* Sigh. "foo/" => "foo" */ | |
207 | --p; | |
208 | *p = '\0'; | |
209 | ||
210 | while (p[-1] == '.') | |
7b4ac7e1 | 211 | { |
4187119d | 212 | if (p - name == 1) |
7b4ac7e1 | 213 | { |
4187119d | 214 | /* "." => getwd (). */ |
215 | name = current_directory; | |
7b4ac7e1 | 216 | goto append; |
217 | } | |
4187119d | 218 | else if (p[-2] == '/') |
7b4ac7e1 | 219 | { |
4187119d | 220 | if (p - name == 2) |
221 | { | |
222 | /* "/." => "/". */ | |
223 | *--p = '\0'; | |
224 | goto append; | |
225 | } | |
226 | else | |
227 | { | |
228 | /* "...foo/." => "...foo". */ | |
229 | p -= 2; | |
230 | *p = '\0'; | |
231 | continue; | |
232 | } | |
7b4ac7e1 | 233 | } |
4187119d | 234 | else |
235 | break; | |
7b4ac7e1 | 236 | } |
7b4ac7e1 | 237 | |
4187119d | 238 | if (*name != '/') |
239 | name = concat (current_directory, "/", name); | |
7b4ac7e1 | 240 | else |
4187119d | 241 | name = savestring (name, p - name); |
242 | make_cleanup (free, name); | |
243 | ||
244 | if (stat (name, &st) < 0) | |
245 | perror_with_name (name); | |
246 | if ((st.st_mode & S_IFMT) != S_IFDIR) | |
247 | error ("%s is not a directory.", name); | |
248 | ||
249 | append: | |
250 | { | |
251 | register unsigned int len = strlen (name); | |
252 | ||
253 | p = source_path; | |
254 | while (1) | |
255 | { | |
256 | if (!strncmp (p, name, len) | |
257 | && (p[len] == '\0' || p[len] == ':')) | |
258 | { | |
259 | if (from_tty) | |
260 | printf ("\"%s\" is already in the source path.\n", name); | |
261 | break; | |
262 | } | |
263 | p = index (p, ':'); | |
264 | if (p != 0) | |
265 | ++p; | |
266 | else | |
267 | break; | |
268 | } | |
269 | if (p == 0) | |
270 | { | |
271 | source_path = concat (old, ":", name); | |
272 | free (old); | |
273 | old = source_path; | |
274 | } | |
275 | } | |
276 | } while (*dirname != '\0'); | |
7b4ac7e1 | 277 | if (from_tty) |
278 | directories_info (); | |
279 | } | |
280 | } | |
281 | \f | |
282 | /* Open a file named STRING, searching path PATH (dir names sep by colons) | |
283 | using mode MODE and protection bits PROT in the calls to open. | |
284 | If TRY_CWD_FIRST, try to open ./STRING before searching PATH. | |
285 | (ie pretend the first element of PATH is ".") | |
286 | If FILENAMED_OPENED is non-null, set it to a newly allocated string naming | |
287 | the actual file opened (this string will always start with a "/" | |
288 | ||
289 | If a file is found, return the descriptor. | |
290 | Otherwise, return -1, with errno set for the last name we tried to open. */ | |
291 | ||
292 | /* >>>> This should only allow files of certain types, | |
293 | >>>> eg executable, non-directory */ | |
294 | int | |
295 | openp (path, try_cwd_first, string, mode, prot, filename_opened) | |
296 | char *path; | |
297 | int try_cwd_first; | |
298 | char *string; | |
299 | int mode; | |
300 | int prot; | |
301 | char **filename_opened; | |
302 | { | |
303 | register int fd; | |
304 | register char *filename; | |
305 | register char *p, *p1; | |
306 | register int len; | |
307 | ||
4187119d | 308 | if (!path) |
309 | path = "."; | |
310 | ||
7b4ac7e1 | 311 | /* ./foo => foo */ |
312 | while (string[0] == '.' && string[1] == '/') | |
313 | string += 2; | |
314 | ||
315 | if (try_cwd_first || string[0] == '/') | |
316 | { | |
317 | filename = string; | |
318 | fd = open (filename, mode, prot); | |
319 | if (fd >= 0 || string[0] == '/') | |
320 | goto done; | |
321 | } | |
322 | ||
323 | filename = (char *) alloca (strlen (path) + strlen (string) + 2); | |
324 | fd = -1; | |
325 | for (p = path; p; p = p1 ? p1 + 1 : 0) | |
326 | { | |
327 | p1 = (char *) index (p, ':'); | |
328 | if (p1) | |
329 | len = p1 - p; | |
330 | else | |
331 | len = strlen (p); | |
332 | ||
333 | strncpy (filename, p, len); | |
334 | filename[len] = 0; | |
335 | strcat (filename, "/"); | |
336 | strcat (filename, string); | |
337 | ||
338 | fd = open (filename, mode, prot); | |
339 | if (fd >= 0) break; | |
340 | } | |
341 | ||
342 | done: | |
343 | if (filename_opened) | |
344 | if (fd < 0) | |
345 | *filename_opened = (char *) 0; | |
346 | else if (filename[0] == '/') | |
347 | *filename_opened = savestring (filename, strlen (filename)); | |
348 | else | |
349 | { | |
632ea0cc | 350 | *filename_opened = concat (current_directory, "/", filename); |
7b4ac7e1 | 351 | } |
352 | ||
353 | return fd; | |
354 | } | |
355 | \f | |
356 | /* Create and initialize the table S->line_charpos that records | |
357 | the positions of the lines in the source file, which is assumed | |
358 | to be open on descriptor DESC. | |
359 | All set S->nlines to the number of such lines. */ | |
360 | ||
361 | static void | |
362 | find_source_lines (s, desc) | |
363 | struct symtab *s; | |
364 | int desc; | |
365 | { | |
366 | struct stat st; | |
367 | register char *data, *p, *end; | |
368 | int nlines = 0; | |
369 | int lines_allocated = 1000; | |
370 | int *line_charpos = (int *) xmalloc (lines_allocated * sizeof (int)); | |
371 | extern int exec_mtime; | |
372 | ||
7a67dd45 | 373 | if (fstat (desc, &st) < 0) |
374 | perror_with_name (s->filename); | |
3bf57d21 | 375 | if (get_exec_file (0) != 0 && exec_mtime < st.st_mtime) |
7b4ac7e1 | 376 | printf ("Source file is more recent than executable.\n"); |
377 | ||
378 | data = (char *) alloca (st.st_size); | |
7a67dd45 | 379 | if (myread (desc, data, st.st_size) < 0) |
380 | perror_with_name (s->filename); | |
7b4ac7e1 | 381 | end = data + st.st_size; |
382 | p = data; | |
383 | line_charpos[0] = 0; | |
384 | nlines = 1; | |
385 | while (p != end) | |
386 | { | |
3bf57d21 | 387 | if (*p++ == '\n' |
388 | /* A newline at the end does not start a new line. */ | |
389 | && p != end) | |
7b4ac7e1 | 390 | { |
391 | if (nlines == lines_allocated) | |
3bf57d21 | 392 | { |
393 | lines_allocated *= 2; | |
394 | line_charpos = (int *) xrealloc (line_charpos, | |
395 | sizeof (int) * lines_allocated); | |
396 | } | |
7b4ac7e1 | 397 | line_charpos[nlines++] = p - data; |
398 | } | |
399 | } | |
400 | s->nlines = nlines; | |
401 | s->line_charpos = (int *) xrealloc (line_charpos, nlines * sizeof (int)); | |
402 | } | |
403 | ||
404 | /* Return the character position of a line LINE in symtab S. | |
405 | Return 0 if anything is invalid. */ | |
406 | ||
407 | int | |
408 | source_line_charpos (s, line) | |
409 | struct symtab *s; | |
410 | int line; | |
411 | { | |
412 | if (!s) return 0; | |
413 | if (!s->line_charpos || line <= 0) return 0; | |
414 | if (line > s->nlines) | |
415 | line = s->nlines; | |
416 | return s->line_charpos[line - 1]; | |
417 | } | |
418 | ||
419 | /* Return the line number of character position POS in symtab S. */ | |
420 | ||
421 | int | |
422 | source_charpos_line (s, chr) | |
423 | register struct symtab *s; | |
424 | register int chr; | |
425 | { | |
426 | register int line = 0; | |
427 | register int *lnp; | |
428 | ||
429 | if (s == 0 || s->line_charpos == 0) return 0; | |
430 | lnp = s->line_charpos; | |
431 | /* Files are usually short, so sequential search is Ok */ | |
432 | while (line < s->nlines && *lnp <= chr) | |
433 | { | |
434 | line++; | |
435 | lnp++; | |
436 | } | |
437 | if (line >= s->nlines) | |
438 | line = s->nlines; | |
439 | return line; | |
440 | } | |
441 | \f | |
442 | /* Get full pathname and line number positions for a symtab. | |
443 | Return nonzero if line numbers may have changed. | |
444 | Set *FULLNAME to actual name of the file as found by `openp', | |
445 | or to 0 if the file is not found. */ | |
446 | ||
447 | int | |
448 | get_filename_and_charpos (s, line, fullname) | |
449 | struct symtab *s; | |
450 | int line; | |
451 | char **fullname; | |
452 | { | |
453 | register int desc, linenums_changed = 0; | |
454 | ||
632ea0cc | 455 | desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname); |
7b4ac7e1 | 456 | if (desc < 0) |
457 | { | |
632ea0cc | 458 | if (fullname) |
459 | *fullname = NULL; | |
7b4ac7e1 | 460 | return 0; |
461 | } | |
632ea0cc | 462 | if (fullname) |
463 | *fullname = s->fullname; | |
7b4ac7e1 | 464 | if (s->line_charpos == 0) linenums_changed = 1; |
465 | if (linenums_changed) find_source_lines (s, desc); | |
466 | close (desc); | |
467 | return linenums_changed; | |
468 | } | |
632ea0cc | 469 | |
470 | /* Print text describing the full name of the source file S | |
471 | and the line number LINE and its corresponding character position. | |
472 | The text starts with two Ctrl-z so that the Emacs-GDB interface | |
473 | can easily find it. | |
474 | ||
3bf57d21 | 475 | MID_STATEMENT is nonzero if the PC is not at the beginning of that line. |
476 | ||
632ea0cc | 477 | Return 1 if successful, 0 if could not find the file. */ |
478 | ||
479 | int | |
3bf57d21 | 480 | identify_source_line (s, line, mid_statement) |
632ea0cc | 481 | struct symtab *s; |
482 | int line; | |
3bf57d21 | 483 | int mid_statement; |
632ea0cc | 484 | { |
485 | if (s->line_charpos == 0) | |
486 | get_filename_and_charpos (s, line, 0); | |
487 | if (s->fullname == 0) | |
488 | return 0; | |
4187119d | 489 | printf ("\032\032%s:%d:%d:%s:0x%x\n", s->fullname, |
3bf57d21 | 490 | line, s->line_charpos[line - 1], |
4187119d | 491 | mid_statement ? "middle" : "beg", |
492 | get_frame_pc (get_current_frame())); | |
3bf57d21 | 493 | current_source_line = line; |
494 | first_line_listed = line; | |
495 | last_line_listed = line; | |
496 | current_source_symtab = s; | |
632ea0cc | 497 | return 1; |
498 | } | |
7b4ac7e1 | 499 | \f |
500 | /* Print source lines from the file of symtab S, | |
501 | starting with line number LINE and stopping before line number STOPLINE. */ | |
502 | ||
503 | void | |
3bf57d21 | 504 | print_source_lines (s, line, stopline, noerror) |
7b4ac7e1 | 505 | struct symtab *s; |
506 | int line, stopline; | |
3bf57d21 | 507 | int noerror; |
7b4ac7e1 | 508 | { |
509 | register int c; | |
510 | register int desc; | |
511 | register FILE *stream; | |
512 | int nlines = stopline - line; | |
513 | ||
632ea0cc | 514 | desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname); |
7b4ac7e1 | 515 | if (desc < 0) |
3bf57d21 | 516 | { |
517 | extern int errno; | |
518 | if (! noerror) | |
519 | perror_with_name (s->filename); | |
520 | print_sys_errmsg (s->filename, errno); | |
521 | return; | |
522 | } | |
7b4ac7e1 | 523 | |
524 | if (s->line_charpos == 0) | |
525 | find_source_lines (s, desc); | |
526 | ||
3bf57d21 | 527 | if (line < 1 || line > s->nlines) |
7b4ac7e1 | 528 | { |
529 | close (desc); | |
7a67dd45 | 530 | error ("Line number %d out of range; %s has %d lines.", |
531 | line, s->filename, s->nlines); | |
7b4ac7e1 | 532 | } |
533 | ||
534 | if (lseek (desc, s->line_charpos[line - 1], 0) < 0) | |
535 | { | |
536 | close (desc); | |
537 | perror_with_name (s->filename); | |
538 | } | |
539 | ||
540 | current_source_symtab = s; | |
541 | current_source_line = line; | |
542 | first_line_listed = line; | |
543 | ||
544 | stream = fdopen (desc, "r"); | |
545 | clearerr (stream); | |
546 | ||
547 | while (nlines-- > 0) | |
548 | { | |
549 | c = fgetc (stream); | |
550 | if (c == EOF) break; | |
632ea0cc | 551 | last_line_listed = current_source_line; |
4187119d | 552 | printf_filtered ("%d\t", current_source_line++); |
7b4ac7e1 | 553 | do |
554 | { | |
555 | if (c < 040 && c != '\t' && c != '\n') | |
4187119d | 556 | printf_filtered ("^%c", c + 0100); |
7b4ac7e1 | 557 | else if (c == 0177) |
4187119d | 558 | printf_filtered ("^?"); |
7b4ac7e1 | 559 | else |
4187119d | 560 | printf_filtered ("%c", c); |
7b4ac7e1 | 561 | } while (c != '\n' && (c = fgetc (stream)) >= 0); |
562 | } | |
563 | ||
564 | fclose (stream); | |
565 | } | |
566 | \f | |
e91b87a3 | 567 | |
568 | ||
569 | /* | |
570 | C++ | |
571 | Print a list of files and line numbers which a user may choose from | |
572 | in order to list a function which was specified ambiguously | |
573 | (as with `list classname::overloadedfuncname', for example). | |
574 | The vector in SALS provides the filenames and line numbers. | |
575 | */ | |
576 | static void | |
577 | ambiguous_line_spec (sals) | |
578 | struct symtabs_and_lines *sals; | |
579 | { | |
580 | int i; | |
581 | ||
582 | for (i = 0; i < sals->nelts; ++i) | |
583 | printf("file: \"%s\", line number: %d\n", | |
584 | sals->sals[i].symtab->filename, sals->sals[i].line); | |
585 | } | |
586 | ||
587 | ||
7b4ac7e1 | 588 | static void |
589 | list_command (arg, from_tty) | |
590 | char *arg; | |
591 | int from_tty; | |
592 | { | |
bb7592f0 | 593 | struct symtabs_and_lines sals, sals_end; |
7b4ac7e1 | 594 | struct symtab_and_line sal, sal_end; |
595 | struct symbol *sym; | |
596 | char *arg1; | |
597 | int no_end = 1; | |
598 | int dummy_end = 0; | |
599 | int dummy_beg = 0; | |
600 | int linenum_beg = 0; | |
601 | char *p; | |
602 | ||
e91b87a3 | 603 | if (symtab_list == 0 && partial_symtab_list == 0) |
4187119d | 604 | error ("No symbol table is loaded. Use the \"symbol-file\" command."); |
7b4ac7e1 | 605 | |
e91b87a3 | 606 | /* Pull in a current source symtab if necessary */ |
607 | if (current_source_symtab == 0 && | |
608 | (arg == 0 || arg[0] == '+' || arg[0] == '-')) | |
4187119d | 609 | select_source_symtab (0); |
e91b87a3 | 610 | |
7b4ac7e1 | 611 | /* "l" or "l +" lists next ten lines. */ |
612 | ||
613 | if (arg == 0 || !strcmp (arg, "+")) | |
614 | { | |
615 | if (current_source_symtab == 0) | |
616 | error ("No default source file yet. Do \"help list\"."); | |
617 | print_source_lines (current_source_symtab, current_source_line, | |
3bf57d21 | 618 | current_source_line + 10, 0); |
7b4ac7e1 | 619 | return; |
620 | } | |
621 | ||
622 | /* "l -" lists previous ten lines, the ones before the ten just listed. */ | |
623 | if (!strcmp (arg, "-")) | |
624 | { | |
625 | if (current_source_symtab == 0) | |
626 | error ("No default source file yet. Do \"help list\"."); | |
627 | print_source_lines (current_source_symtab, | |
628 | max (first_line_listed - 10, 1), | |
3bf57d21 | 629 | first_line_listed, 0); |
7b4ac7e1 | 630 | return; |
631 | } | |
632 | ||
633 | /* Now if there is only one argument, decode it in SAL | |
634 | and set NO_END. | |
635 | If there are two arguments, decode them in SAL and SAL_END | |
636 | and clear NO_END; however, if one of the arguments is blank, | |
637 | set DUMMY_BEG or DUMMY_END to record that fact. */ | |
638 | ||
639 | arg1 = arg; | |
640 | if (*arg1 == ',') | |
641 | dummy_beg = 1; | |
642 | else | |
bb7592f0 | 643 | { |
644 | sals = decode_line_1 (&arg1, 0, 0, 0); | |
645 | ||
646 | if (! sals.nelts) return; /* C++ */ | |
e91b87a3 | 647 | if (sals.nelts > 1) |
bb7592f0 | 648 | { |
e91b87a3 | 649 | ambiguous_line_spec (&sals); |
650 | free (sals.sals); | |
651 | return; | |
bb7592f0 | 652 | } |
653 | ||
654 | sal = sals.sals[0]; | |
655 | free (sals.sals); | |
656 | } | |
7b4ac7e1 | 657 | |
658 | /* Record whether the BEG arg is all digits. */ | |
659 | ||
660 | for (p = arg; p != arg1 && *p >= '0' && *p <= '9'; p++); | |
661 | linenum_beg = (p == arg1); | |
662 | ||
663 | while (*arg1 == ' ' || *arg1 == '\t') | |
664 | arg1++; | |
665 | if (*arg1 == ',') | |
666 | { | |
667 | no_end = 0; | |
668 | arg1++; | |
669 | while (*arg1 == ' ' || *arg1 == '\t') | |
670 | arg1++; | |
671 | if (*arg1 == 0) | |
672 | dummy_end = 1; | |
7b4ac7e1 | 673 | else |
bb7592f0 | 674 | { |
675 | if (dummy_beg) | |
676 | sals_end = decode_line_1 (&arg1, 0, 0, 0); | |
677 | else | |
678 | sals_end = decode_line_1 (&arg1, 0, sal.symtab, sal.line); | |
e91b87a3 | 679 | if (sals_end.nelts == 0) |
680 | return; | |
681 | if (sals_end.nelts > 1) | |
682 | { | |
683 | ambiguous_line_spec (&sals_end); | |
684 | free (sals_end.sals); | |
685 | return; | |
686 | } | |
bb7592f0 | 687 | sal_end = sals_end.sals[0]; |
688 | free (sals_end.sals); | |
689 | } | |
7b4ac7e1 | 690 | } |
691 | ||
692 | if (*arg1) | |
693 | error ("Junk at end of line specification."); | |
694 | ||
695 | if (!no_end && !dummy_beg && !dummy_end | |
696 | && sal.symtab != sal_end.symtab) | |
697 | error ("Specified start and end are in different files."); | |
698 | if (dummy_beg && dummy_end) | |
699 | error ("Two empty args do not say what lines to list."); | |
700 | ||
701 | /* if line was specified by address, | |
702 | first print exactly which line, and which file. | |
703 | In this case, sal.symtab == 0 means address is outside | |
704 | of all known source files, not that user failed to give a filename. */ | |
705 | if (*arg == '*') | |
706 | { | |
707 | if (sal.symtab == 0) | |
708 | error ("No source file for address 0x%x.", sal.pc); | |
709 | sym = find_pc_function (sal.pc); | |
710 | if (sym) | |
711 | printf ("0x%x is in %s (%s, line %d).\n", | |
712 | sal.pc, SYMBOL_NAME (sym), sal.symtab->filename, sal.line); | |
713 | else | |
714 | printf ("0x%x is in %s, line %d.\n", | |
715 | sal.pc, sal.symtab->filename, sal.line); | |
716 | } | |
717 | ||
718 | /* If line was not specified by just a line number, | |
719 | and it does not imply a symtab, it must be an undebuggable symbol | |
720 | which means no source code. */ | |
721 | ||
722 | if (! linenum_beg && sal.symtab == 0) | |
723 | error ("No line number known for %s.", arg); | |
724 | ||
725 | /* If this command is repeated with RET, | |
726 | turn it into the no-arg variant. */ | |
727 | ||
728 | if (from_tty) | |
729 | *arg = 0; | |
730 | ||
731 | if (dummy_beg && sal_end.symtab == 0) | |
732 | error ("No default source file yet. Do \"help list\"."); | |
733 | if (dummy_beg) | |
734 | print_source_lines (sal_end.symtab, max (sal_end.line - 9, 1), | |
3bf57d21 | 735 | sal_end.line + 1, 0); |
7b4ac7e1 | 736 | else if (sal.symtab == 0) |
737 | error ("No default source file yet. Do \"help list\"."); | |
738 | else if (no_end) | |
3bf57d21 | 739 | print_source_lines (sal.symtab, max (sal.line - 5, 1), sal.line + 5, 0); |
7b4ac7e1 | 740 | else |
741 | print_source_lines (sal.symtab, sal.line, | |
e91b87a3 | 742 | dummy_end ? sal.line + 10 : sal_end.line + 1, |
743 | 0); | |
7b4ac7e1 | 744 | } |
745 | \f | |
746 | /* Print info on range of pc's in a specified line. */ | |
747 | ||
748 | static void | |
749 | line_info (arg, from_tty) | |
750 | char *arg; | |
751 | int from_tty; | |
752 | { | |
bb7592f0 | 753 | struct symtabs_and_lines sals; |
7b4ac7e1 | 754 | struct symtab_and_line sal; |
755 | int start_pc, end_pc; | |
e91b87a3 | 756 | int i; |
7b4ac7e1 | 757 | |
758 | if (arg == 0) | |
759 | { | |
760 | sal.symtab = current_source_symtab; | |
632ea0cc | 761 | sal.line = last_line_listed; |
e91b87a3 | 762 | sals.nelts = 1; |
763 | sals.sals = (struct symtab_and_line *) | |
764 | xmalloc (sizeof (struct symtab_and_line)); | |
765 | sals.sals[0] = sal; | |
7b4ac7e1 | 766 | } |
767 | else | |
768 | { | |
e91b87a3 | 769 | sals = decode_line_spec_1 (arg, 0); |
bb7592f0 | 770 | |
7b4ac7e1 | 771 | /* If this command is repeated with RET, |
772 | turn it into the no-arg variant. */ | |
7b4ac7e1 | 773 | if (from_tty) |
774 | *arg = 0; | |
775 | } | |
776 | ||
e91b87a3 | 777 | /* C++ More than one line may have been specified, as when the user |
778 | specifies an overloaded function name. Print info on them all. */ | |
779 | for (i = 0; i < sals.nelts; i++) | |
7b4ac7e1 | 780 | { |
e91b87a3 | 781 | sal = sals.sals[i]; |
782 | ||
783 | if (sal.symtab == 0) | |
784 | error ("No source file specified."); | |
785 | ||
786 | if (sal.line > 0 | |
787 | && find_line_pc_range (sal.symtab, sal.line, &start_pc, &end_pc)) | |
788 | { | |
789 | if (start_pc == end_pc) | |
790 | printf ("Line %d of \"%s\" is at pc 0x%x but contains no code.\n", | |
791 | sal.line, sal.symtab->filename, start_pc); | |
792 | else | |
793 | printf ("Line %d of \"%s\" starts at pc 0x%x and ends at 0x%x.\n", | |
794 | sal.line, sal.symtab->filename, start_pc, end_pc); | |
795 | /* x/i should display this line's code. */ | |
796 | set_next_address (start_pc); | |
797 | /* Repeating "info line" should do the following line. */ | |
798 | last_line_listed = sal.line + 1; | |
799 | } | |
7b4ac7e1 | 800 | else |
e91b87a3 | 801 | printf ("Line number %d is out of range for \"%s\".\n", |
802 | sal.line, sal.symtab->filename); | |
7b4ac7e1 | 803 | } |
7b4ac7e1 | 804 | } |
805 | \f | |
632ea0cc | 806 | /* Commands to search the source file for a regexp. */ |
807 | ||
808 | static void | |
809 | forward_search_command (regex, from_tty) | |
810 | char *regex; | |
811 | { | |
812 | register int c; | |
813 | register int desc; | |
814 | register FILE *stream; | |
815 | int line = last_line_listed + 1; | |
816 | char *msg; | |
817 | ||
818 | msg = (char *) re_comp (regex); | |
819 | if (msg) | |
820 | error (msg); | |
821 | ||
4187119d | 822 | if (current_source_symtab == 0) |
823 | select_source_symtab (0); | |
632ea0cc | 824 | |
825 | /* Search from last_line_listed+1 in current_source_symtab */ | |
826 | ||
827 | desc = openp (source_path, 0, current_source_symtab->filename, | |
828 | O_RDONLY, 0, ¤t_source_symtab->fullname); | |
829 | if (desc < 0) | |
830 | perror_with_name (current_source_symtab->filename); | |
831 | ||
832 | if (current_source_symtab->line_charpos == 0) | |
833 | find_source_lines (current_source_symtab, desc); | |
834 | ||
3bf57d21 | 835 | if (line < 1 || line > current_source_symtab->nlines) |
632ea0cc | 836 | { |
837 | close (desc); | |
838 | error ("Expression not found"); | |
839 | } | |
840 | ||
841 | if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) | |
842 | { | |
843 | close (desc); | |
844 | perror_with_name (current_source_symtab->filename); | |
845 | } | |
846 | ||
847 | stream = fdopen (desc, "r"); | |
848 | clearerr (stream); | |
849 | while (1) { | |
850 | char buf[4096]; /* Should be reasonable??? */ | |
851 | register char *p = buf; | |
852 | ||
853 | c = fgetc (stream); | |
854 | if (c == EOF) | |
855 | break; | |
856 | do { | |
857 | *p++ = c; | |
858 | } while (c != '\n' && (c = fgetc (stream)) >= 0); | |
859 | ||
860 | /* we now have a source line in buf, null terminate and match */ | |
861 | *p = 0; | |
862 | if (re_exec (buf) > 0) | |
863 | { | |
864 | /* Match! */ | |
865 | fclose (stream); | |
866 | print_source_lines (current_source_symtab, | |
3bf57d21 | 867 | line, line+1, 0); |
632ea0cc | 868 | current_source_line = max (line - 5, 1); |
869 | return; | |
870 | } | |
871 | line++; | |
872 | } | |
873 | ||
874 | printf ("Expression not found\n"); | |
875 | fclose (stream); | |
876 | } | |
877 | ||
878 | static void | |
879 | reverse_search_command (regex, from_tty) | |
880 | char *regex; | |
881 | { | |
882 | register int c; | |
883 | register int desc; | |
884 | register FILE *stream; | |
885 | int line = last_line_listed - 1; | |
886 | char *msg; | |
887 | ||
888 | msg = (char *) re_comp (regex); | |
889 | if (msg) | |
890 | error (msg); | |
891 | ||
4187119d | 892 | if (current_source_symtab == 0) |
893 | select_source_symtab (0); | |
632ea0cc | 894 | |
895 | /* Search from last_line_listed-1 in current_source_symtab */ | |
896 | ||
897 | desc = openp (source_path, 0, current_source_symtab->filename, | |
898 | O_RDONLY, 0, ¤t_source_symtab->fullname); | |
899 | if (desc < 0) | |
900 | perror_with_name (current_source_symtab->filename); | |
901 | ||
902 | if (current_source_symtab->line_charpos == 0) | |
903 | find_source_lines (current_source_symtab, desc); | |
904 | ||
3bf57d21 | 905 | if (line < 1 || line > current_source_symtab->nlines) |
632ea0cc | 906 | { |
907 | close (desc); | |
908 | error ("Expression not found"); | |
909 | } | |
910 | ||
911 | if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) | |
912 | { | |
913 | close (desc); | |
914 | perror_with_name (current_source_symtab->filename); | |
915 | } | |
916 | ||
917 | stream = fdopen (desc, "r"); | |
918 | clearerr (stream); | |
919 | while (1) | |
920 | { | |
921 | char buf[4096]; /* Should be reasonable??? */ | |
922 | register char *p = buf; | |
923 | ||
924 | c = fgetc (stream); | |
925 | if (c == EOF) | |
926 | break; | |
927 | do { | |
928 | *p++ = c; | |
929 | } while (c != '\n' && (c = fgetc (stream)) >= 0); | |
930 | ||
931 | /* We now have a source line in buf; null terminate and match. */ | |
932 | *p = 0; | |
933 | if (re_exec (buf) > 0) | |
934 | { | |
935 | /* Match! */ | |
936 | fclose (stream); | |
937 | print_source_lines (current_source_symtab, | |
3bf57d21 | 938 | line, line+1, 0); |
632ea0cc | 939 | current_source_line = max (line - 5, 1); |
940 | return; | |
941 | } | |
942 | line--; | |
943 | if (fseek (stream, current_source_symtab->line_charpos[line - 1], 0) < 0) | |
944 | { | |
945 | fclose (stream); | |
946 | perror_with_name (current_source_symtab->filename); | |
947 | } | |
948 | } | |
949 | ||
950 | printf ("Expression not found\n"); | |
951 | fclose (stream); | |
952 | return; | |
953 | } | |
954 | \f | |
e91b87a3 | 955 | void |
956 | _initialize_source () | |
7b4ac7e1 | 957 | { |
958 | current_source_symtab = 0; | |
959 | init_source_path (); | |
960 | ||
961 | add_com ("directory", class_files, directory_command, | |
962 | "Add directory DIR to end of search path for source files.\n\ | |
963 | With no argument, reset the search path to just the working directory\n\ | |
964 | and forget cached info on line positions in source files."); | |
965 | ||
966 | add_info ("directories", directories_info, | |
967 | "Current search path for finding source files."); | |
968 | ||
969 | add_info ("line", line_info, | |
970 | "Core addresses of the code for a source line.\n\ | |
971 | Line can be specified as\n\ | |
972 | LINENUM, to list around that line in current file,\n\ | |
973 | FILE:LINENUM, to list around that line in that file,\n\ | |
974 | FUNCTION, to list around beginning of that function,\n\ | |
975 | FILE:FUNCTION, to distinguish among like-named static functions.\n\ | |
976 | Default is to describe the last source line that was listed.\n\n\ | |
977 | This sets the default address for \"x\" to the line's first instruction\n\ | |
978 | so that \"x/i\" suffices to start examining the machine code.\n\ | |
979 | The address is also stored as the value of \"$_\"."); | |
980 | ||
632ea0cc | 981 | add_com ("forward-search", class_files, forward_search_command, |
982 | "Search for regular expression (see regex(3)) from last line listed."); | |
983 | add_com_alias ("search", "forward-search", class_files, 0); | |
984 | ||
985 | add_com ("reverse-search", class_files, reverse_search_command, | |
986 | "Search backward for regular expression (see regex(3)) from last line listed."); | |
987 | ||
7b4ac7e1 | 988 | add_com ("list", class_files, list_command, |
989 | "List specified function or line.\n\ | |
990 | With no argument, lists ten more lines after or around previous listing.\n\ | |
991 | \"list -\" lists the ten lines before a previous ten-line listing.\n\ | |
992 | One argument specifies a line, and ten lines are listed around that line.\n\ | |
993 | Two arguments with comma between specify starting and ending lines to list.\n\ | |
994 | Lines can be specified in these ways:\n\ | |
995 | LINENUM, to list around that line in current file,\n\ | |
996 | FILE:LINENUM, to list around that line in that file,\n\ | |
997 | FUNCTION, to list around beginning of that function,\n\ | |
998 | FILE:FUNCTION, to distinguish among like-named static functions.\n\ | |
999 | *ADDRESS, to list around the line containing that address.\n\ | |
1000 | With two args if one is empty it stands for ten lines away from the other arg."); | |
1001 | } | |
1002 |