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04497f0b NW |
1 | /*- |
2 | * This code is derived from software copyrighted by the Free Software | |
3 | * Foundation. | |
4 | * | |
5 | * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. | |
6 | * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory. | |
7 | */ | |
8 | ||
9 | #ifndef lint | |
10 | static char sccsid[] = "@(#)source.c 6.3 (Berkeley) 5/8/91"; | |
11 | #endif /* not lint */ | |
12 | ||
13 | /* List lines of source files for GDB, the GNU debugger. | |
14 | Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc. | |
15 | ||
16 | This file is part of GDB. | |
17 | ||
18 | GDB is free software; you can redistribute it and/or modify | |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 1, or (at your option) | |
21 | any later version. | |
22 | ||
23 | GDB is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with GDB; see the file COPYING. If not, write to | |
30 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
31 | ||
32 | #include <stdio.h> | |
39955f2e | 33 | #include <string.h> |
04497f0b | 34 | #include "defs.h" |
04497f0b | 35 | #include "param.h" |
39955f2e | 36 | #include "symtab.h" |
04497f0b NW |
37 | |
38 | #ifdef USG | |
39 | #include <sys/types.h> | |
40 | #include <fcntl.h> | |
41 | #endif | |
42 | ||
43 | #include <sys/param.h> | |
44 | #include <sys/stat.h> | |
45 | #include <sys/file.h> | |
46 | ||
47 | /* Path of directories to search for source files. | |
48 | Same format as the PATH environment variable's value. */ | |
49 | ||
50 | static char *source_path; | |
51 | ||
52 | /* Symtab of default file for listing lines of. */ | |
53 | ||
54 | struct symtab *current_source_symtab; | |
55 | ||
56 | /* Default next line to list. */ | |
57 | ||
58 | int current_source_line; | |
59 | ||
60 | /* Line number of last line printed. Default for various commands. | |
61 | current_source_line is usually, but not always, the same as this. */ | |
62 | ||
63 | static int last_line_listed; | |
64 | ||
65 | /* First line number listed by last listing command. */ | |
66 | ||
67 | static int first_line_listed; | |
68 | ||
69 | \f | |
70 | struct symtab *psymtab_to_symtab (); | |
71 | ||
72 | /* Set the source file default for the "list" command, specifying a | |
73 | symtab. Sigh. Behaivior specification: If it is called with a | |
74 | non-zero argument, that is the symtab to select. If it is not, | |
75 | first lookup "main"; if it exists, use the symtab and line it | |
76 | defines. If not, take the last symtab in the symtab_list (if it | |
77 | exists) or the last symtab in the psytab_list (if *it* exists). If | |
78 | none of this works, report an error. */ | |
79 | ||
80 | void | |
81 | select_source_symtab (s) | |
82 | register struct symtab *s; | |
83 | { | |
84 | struct symtabs_and_lines sals; | |
85 | struct symtab_and_line sal; | |
86 | struct partial_symtab *ps, *cs_pst; | |
87 | ||
88 | if (s) | |
89 | { | |
90 | current_source_symtab = s; | |
91 | current_source_line = 1; | |
92 | return; | |
93 | } | |
94 | ||
95 | /* Make the default place to list be the function `main' | |
96 | if one exists. */ | |
97 | if (lookup_symbol ("main", 0, VAR_NAMESPACE, 0)) | |
98 | { | |
99 | sals = decode_line_spec ("main", 1); | |
100 | sal = sals.sals[0]; | |
101 | free (sals.sals); | |
102 | current_source_symtab = sal.symtab; | |
103 | current_source_line = max (sal.line - 9, 1); | |
104 | return; | |
105 | } | |
106 | ||
107 | /* All right; find the last file in the symtab list (ignoring .h's). */ | |
108 | ||
109 | if (s = symtab_list) | |
110 | { | |
111 | do | |
112 | { | |
113 | char *name = s->filename; | |
114 | int len = strlen (name); | |
115 | if (! (len > 2 && !strcmp (&name[len - 2], ".h"))) | |
116 | current_source_symtab = s; | |
117 | s = s->next; | |
118 | } | |
119 | while (s); | |
120 | current_source_line = 1; | |
121 | } | |
122 | else if (partial_symtab_list) | |
123 | { | |
124 | ps = partial_symtab_list; | |
125 | while (ps) | |
126 | { | |
127 | char *name = ps->filename; | |
128 | int len = strlen (name); | |
129 | if (! (len > 2 && !strcmp (&name[len - 2], ".h"))) | |
130 | cs_pst = ps; | |
131 | ps = ps->next; | |
132 | } | |
133 | if (cs_pst) | |
134 | if (cs_pst->readin) | |
135 | fatal ("Internal: select_source_symtab: readin pst found and no symtabs."); | |
136 | else | |
137 | current_source_symtab = psymtab_to_symtab (cs_pst); | |
138 | else | |
139 | current_source_symtab = 0; | |
140 | current_source_line = 1; | |
141 | } | |
142 | } | |
143 | \f | |
144 | static void | |
145 | directories_info () | |
146 | { | |
147 | printf ("Source directories searched: %s\n", source_path); | |
148 | } | |
149 | ||
150 | void | |
151 | init_source_path () | |
152 | { | |
153 | register struct symtab *s; | |
154 | ||
155 | source_path = savestring (current_directory, strlen (current_directory)); | |
156 | ||
157 | /* Forget what we learned about line positions in source files; | |
158 | must check again now since files may be found in | |
159 | a different directory now. */ | |
160 | for (s = symtab_list; s; s = s->next) | |
161 | if (s->line_charpos != 0) | |
162 | { | |
163 | free (s->line_charpos); | |
164 | s->line_charpos = 0; | |
165 | } | |
166 | } | |
167 | ||
168 | void | |
169 | directory_command (dirname, from_tty) | |
170 | char *dirname; | |
171 | int from_tty; | |
172 | { | |
173 | char *old = source_path; | |
174 | ||
175 | dont_repeat (); | |
176 | ||
177 | if (dirname == 0) | |
178 | { | |
179 | if (query ("Reinitialize source path to %s? ", current_directory)) | |
180 | { | |
181 | init_source_path (); | |
182 | free (old); | |
183 | } | |
184 | } | |
185 | else | |
186 | { | |
187 | dirname = tilde_expand (dirname); | |
188 | make_cleanup (free, dirname); | |
189 | ||
190 | do | |
191 | { | |
04497f0b NW |
192 | char *name = dirname; |
193 | register char *p; | |
194 | struct stat st; | |
195 | ||
196 | { | |
197 | char *colon = index (name, ':'); | |
198 | char *space = index (name, ' '); | |
199 | char *tab = index (name, '\t'); | |
200 | if (colon == 0 && space == 0 && tab == 0) | |
201 | p = dirname = name + strlen (name); | |
202 | else | |
203 | { | |
204 | p = 0; | |
205 | if (colon != 0 && (p == 0 || colon < p)) | |
206 | p = colon; | |
207 | if (space != 0 && (p == 0 || space < p)) | |
208 | p = space; | |
209 | if (tab != 0 && (p == 0 || tab < p)) | |
210 | p = tab; | |
211 | dirname = p + 1; | |
212 | while (*dirname == ':' || *dirname == ' ' || *dirname == '\t') | |
213 | ++dirname; | |
214 | } | |
215 | } | |
216 | ||
217 | if (p[-1] == '/') | |
218 | /* Sigh. "foo/" => "foo" */ | |
219 | --p; | |
220 | *p = '\0'; | |
221 | ||
222 | while (p[-1] == '.') | |
223 | { | |
224 | if (p - name == 1) | |
225 | { | |
226 | /* "." => getwd (). */ | |
227 | name = current_directory; | |
228 | goto append; | |
229 | } | |
230 | else if (p[-2] == '/') | |
231 | { | |
232 | if (p - name == 2) | |
233 | { | |
234 | /* "/." => "/". */ | |
235 | *--p = '\0'; | |
236 | goto append; | |
237 | } | |
238 | else | |
239 | { | |
240 | /* "...foo/." => "...foo". */ | |
241 | p -= 2; | |
242 | *p = '\0'; | |
243 | continue; | |
244 | } | |
245 | } | |
246 | else | |
247 | break; | |
248 | } | |
249 | ||
250 | if (*name != '/') | |
251 | name = concat (current_directory, "/", name); | |
252 | else | |
253 | name = savestring (name, p - name); | |
254 | make_cleanup (free, name); | |
255 | ||
256 | if (stat (name, &st) < 0) | |
257 | perror_with_name (name); | |
258 | if ((st.st_mode & S_IFMT) != S_IFDIR) | |
259 | error ("%s is not a directory.", name); | |
260 | ||
261 | append: | |
262 | { | |
263 | register unsigned int len = strlen (name); | |
264 | ||
265 | p = source_path; | |
266 | while (1) | |
267 | { | |
268 | if (!strncmp (p, name, len) | |
269 | && (p[len] == '\0' || p[len] == ':')) | |
270 | { | |
271 | if (from_tty) | |
272 | printf ("\"%s\" is already in the source path.\n", name); | |
273 | break; | |
274 | } | |
275 | p = index (p, ':'); | |
276 | if (p != 0) | |
277 | ++p; | |
278 | else | |
279 | break; | |
280 | } | |
281 | if (p == 0) | |
282 | { | |
283 | source_path = concat (old, ":", name); | |
284 | free (old); | |
285 | old = source_path; | |
286 | } | |
287 | } | |
288 | } while (*dirname != '\0'); | |
289 | if (from_tty) | |
290 | directories_info (); | |
291 | } | |
292 | } | |
293 | \f | |
294 | /* Open a file named STRING, searching path PATH (dir names sep by colons) | |
295 | using mode MODE and protection bits PROT in the calls to open. | |
296 | If TRY_CWD_FIRST, try to open ./STRING before searching PATH. | |
297 | (ie pretend the first element of PATH is ".") | |
298 | If FILENAMED_OPENED is non-null, set it to a newly allocated string naming | |
299 | the actual file opened (this string will always start with a "/" | |
300 | ||
301 | If a file is found, return the descriptor. | |
302 | Otherwise, return -1, with errno set for the last name we tried to open. */ | |
303 | ||
304 | /* >>>> This should only allow files of certain types, | |
305 | >>>> eg executable, non-directory */ | |
306 | int | |
307 | openp (path, try_cwd_first, string, mode, prot, filename_opened) | |
308 | char *path; | |
309 | int try_cwd_first; | |
310 | char *string; | |
311 | int mode; | |
312 | int prot; | |
313 | char **filename_opened; | |
314 | { | |
315 | register int fd; | |
316 | register char *filename; | |
317 | register char *p, *p1; | |
318 | register int len; | |
319 | ||
320 | if (!path) | |
321 | path = "."; | |
322 | ||
323 | /* ./foo => foo */ | |
324 | while (string[0] == '.' && string[1] == '/') | |
325 | string += 2; | |
326 | ||
327 | if (try_cwd_first || string[0] == '/') | |
328 | { | |
329 | filename = string; | |
330 | fd = open (filename, mode, prot); | |
331 | if (fd >= 0 || string[0] == '/') | |
332 | goto done; | |
333 | } | |
334 | ||
335 | filename = (char *) alloca (strlen (path) + strlen (string) + 2); | |
336 | fd = -1; | |
337 | for (p = path; p; p = p1 ? p1 + 1 : 0) | |
338 | { | |
339 | p1 = (char *) index (p, ':'); | |
340 | if (p1) | |
341 | len = p1 - p; | |
342 | else | |
343 | len = strlen (p); | |
344 | ||
345 | strncpy (filename, p, len); | |
346 | filename[len] = 0; | |
347 | strcat (filename, "/"); | |
348 | strcat (filename, string); | |
349 | ||
350 | fd = open (filename, mode, prot); | |
351 | if (fd >= 0) break; | |
352 | } | |
353 | ||
354 | done: | |
355 | if (filename_opened) | |
356 | if (fd < 0) | |
357 | *filename_opened = (char *) 0; | |
358 | else if (filename[0] == '/') | |
359 | *filename_opened = savestring (filename, strlen (filename)); | |
360 | else | |
361 | { | |
362 | *filename_opened = concat (current_directory, "/", filename); | |
363 | } | |
364 | ||
365 | return fd; | |
366 | } | |
367 | \f | |
368 | /* Create and initialize the table S->line_charpos that records | |
369 | the positions of the lines in the source file, which is assumed | |
370 | to be open on descriptor DESC. | |
371 | All set S->nlines to the number of such lines. */ | |
372 | ||
373 | static void | |
374 | find_source_lines (s, desc) | |
375 | struct symtab *s; | |
376 | int desc; | |
377 | { | |
378 | struct stat st; | |
379 | register char *data, *p, *end; | |
380 | int nlines = 0; | |
381 | int lines_allocated = 1000; | |
382 | int *line_charpos = (int *) xmalloc (lines_allocated * sizeof (int)); | |
383 | extern int exec_mtime; | |
384 | ||
385 | if (fstat (desc, &st) < 0) | |
386 | perror_with_name (s->filename); | |
387 | if (get_exec_file (0) != 0 && exec_mtime < st.st_mtime) | |
388 | printf ("Source file is more recent than executable.\n"); | |
389 | ||
390 | data = (char *) alloca (st.st_size); | |
391 | if (myread (desc, data, st.st_size) < 0) | |
392 | perror_with_name (s->filename); | |
393 | end = data + st.st_size; | |
394 | p = data; | |
395 | line_charpos[0] = 0; | |
396 | nlines = 1; | |
397 | while (p != end) | |
398 | { | |
399 | if (*p++ == '\n' | |
400 | /* A newline at the end does not start a new line. */ | |
401 | && p != end) | |
402 | { | |
403 | if (nlines == lines_allocated) | |
404 | { | |
405 | lines_allocated *= 2; | |
406 | line_charpos = (int *) xrealloc (line_charpos, | |
407 | sizeof (int) * lines_allocated); | |
408 | } | |
409 | line_charpos[nlines++] = p - data; | |
410 | } | |
411 | } | |
412 | s->nlines = nlines; | |
413 | s->line_charpos = (int *) xrealloc (line_charpos, nlines * sizeof (int)); | |
414 | } | |
415 | ||
416 | /* Return the character position of a line LINE in symtab S. | |
417 | Return 0 if anything is invalid. */ | |
418 | ||
419 | int | |
420 | source_line_charpos (s, line) | |
421 | struct symtab *s; | |
422 | int line; | |
423 | { | |
424 | if (!s) return 0; | |
425 | if (!s->line_charpos || line <= 0) return 0; | |
426 | if (line > s->nlines) | |
427 | line = s->nlines; | |
428 | return s->line_charpos[line - 1]; | |
429 | } | |
430 | ||
431 | /* Return the line number of character position POS in symtab S. */ | |
432 | ||
433 | int | |
434 | source_charpos_line (s, chr) | |
435 | register struct symtab *s; | |
436 | register int chr; | |
437 | { | |
438 | register int line = 0; | |
439 | register int *lnp; | |
440 | ||
441 | if (s == 0 || s->line_charpos == 0) return 0; | |
442 | lnp = s->line_charpos; | |
443 | /* Files are usually short, so sequential search is Ok */ | |
444 | while (line < s->nlines && *lnp <= chr) | |
445 | { | |
446 | line++; | |
447 | lnp++; | |
448 | } | |
449 | if (line >= s->nlines) | |
450 | line = s->nlines; | |
451 | return line; | |
452 | } | |
453 | \f | |
454 | /* Get full pathname and line number positions for a symtab. | |
455 | Return nonzero if line numbers may have changed. | |
456 | Set *FULLNAME to actual name of the file as found by `openp', | |
457 | or to 0 if the file is not found. */ | |
458 | ||
459 | int | |
460 | get_filename_and_charpos (s, line, fullname) | |
461 | struct symtab *s; | |
462 | int line; | |
463 | char **fullname; | |
464 | { | |
465 | register int desc, linenums_changed = 0; | |
466 | ||
467 | desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname); | |
468 | if (desc < 0) | |
469 | { | |
470 | if (fullname) | |
471 | *fullname = NULL; | |
472 | return 0; | |
473 | } | |
474 | if (fullname) | |
475 | *fullname = s->fullname; | |
476 | if (s->line_charpos == 0) linenums_changed = 1; | |
477 | if (linenums_changed) find_source_lines (s, desc); | |
478 | close (desc); | |
479 | return linenums_changed; | |
480 | } | |
481 | ||
482 | /* Print text describing the full name of the source file S | |
483 | and the line number LINE and its corresponding character position. | |
484 | The text starts with two Ctrl-z so that the Emacs-GDB interface | |
485 | can easily find it. | |
486 | ||
487 | MID_STATEMENT is nonzero if the PC is not at the beginning of that line. | |
488 | ||
489 | Return 1 if successful, 0 if could not find the file. */ | |
490 | ||
491 | int | |
492 | identify_source_line (s, line, mid_statement) | |
493 | struct symtab *s; | |
494 | int line; | |
495 | int mid_statement; | |
496 | { | |
497 | if (s->line_charpos == 0) | |
498 | get_filename_and_charpos (s, line, 0); | |
499 | if (s->fullname == 0) | |
500 | return 0; | |
501 | printf ("\032\032%s:%d:%d:%s:0x%x\n", s->fullname, | |
502 | line, s->line_charpos[line - 1], | |
503 | mid_statement ? "middle" : "beg", | |
504 | get_frame_pc (get_current_frame())); | |
505 | current_source_line = line; | |
506 | first_line_listed = line; | |
507 | last_line_listed = line; | |
508 | current_source_symtab = s; | |
509 | return 1; | |
510 | } | |
511 | \f | |
512 | /* Print source lines from the file of symtab S, | |
513 | starting with line number LINE and stopping before line number STOPLINE. */ | |
514 | ||
515 | void | |
516 | print_source_lines (s, line, stopline, noerror) | |
517 | struct symtab *s; | |
518 | int line, stopline; | |
519 | int noerror; | |
520 | { | |
521 | register int c; | |
522 | register int desc; | |
523 | register FILE *stream; | |
524 | int nlines = stopline - line; | |
525 | ||
526 | desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname); | |
527 | if (desc < 0) | |
528 | { | |
529 | extern int errno; | |
530 | if (noerror && line + 1 == stopline) | |
531 | { | |
532 | /* can't find the file - tell user where we are anyway */ | |
533 | current_source_symtab = s; | |
534 | current_source_line = line; | |
535 | first_line_listed = line; | |
536 | last_line_listed = line; | |
537 | printf_filtered ("%d\t(%s)\n", current_source_line++, s->filename); | |
538 | } | |
539 | else | |
540 | { | |
541 | if (! noerror) | |
542 | perror_with_name (s->filename); | |
543 | print_sys_errmsg (s->filename, errno); | |
544 | } | |
545 | return; | |
546 | } | |
547 | ||
548 | if (s->line_charpos == 0) | |
549 | find_source_lines (s, desc); | |
550 | ||
551 | if (line < 1 || line > s->nlines) | |
552 | { | |
553 | close (desc); | |
554 | error ("Line number %d out of range; %s has %d lines.", | |
555 | line, s->filename, s->nlines); | |
556 | } | |
557 | ||
558 | if (lseek (desc, s->line_charpos[line - 1], 0) < 0) | |
559 | { | |
560 | close (desc); | |
561 | perror_with_name (s->filename); | |
562 | } | |
563 | ||
564 | current_source_symtab = s; | |
565 | current_source_line = line; | |
566 | first_line_listed = line; | |
567 | ||
568 | stream = fdopen (desc, "r"); | |
569 | clearerr (stream); | |
570 | ||
571 | while (nlines-- > 0) | |
572 | { | |
573 | c = fgetc (stream); | |
574 | if (c == EOF) break; | |
575 | last_line_listed = current_source_line; | |
576 | printf_filtered ("%d\t", current_source_line++); | |
577 | do | |
578 | { | |
579 | if (c < 040 && c != '\t' && c != '\n') | |
580 | printf_filtered ("^%c", c + 0100); | |
581 | else if (c == 0177) | |
582 | printf_filtered ("^?"); | |
583 | else | |
584 | printf_filtered ("%c", c); | |
585 | } while (c != '\n' && (c = fgetc (stream)) >= 0); | |
586 | } | |
587 | ||
588 | fclose (stream); | |
589 | } | |
590 | \f | |
591 | ||
592 | ||
593 | /* | |
594 | C++ | |
595 | Print a list of files and line numbers which a user may choose from | |
596 | in order to list a function which was specified ambiguously | |
597 | (as with `list classname::overloadedfuncname', for example). | |
598 | The vector in SALS provides the filenames and line numbers. | |
599 | */ | |
600 | static void | |
601 | ambiguous_line_spec (sals) | |
602 | struct symtabs_and_lines *sals; | |
603 | { | |
604 | int i; | |
605 | ||
606 | for (i = 0; i < sals->nelts; ++i) | |
607 | printf("file: \"%s\", line number: %d\n", | |
608 | sals->sals[i].symtab->filename, sals->sals[i].line); | |
609 | } | |
610 | ||
611 | ||
612 | static void | |
613 | file_command(arg, from_tty) | |
614 | char *arg; | |
615 | int from_tty; | |
616 | { | |
617 | struct symtabs_and_lines sals; | |
618 | struct symtab_and_line sal; | |
619 | struct symbol *sym; | |
620 | char *arg1; | |
621 | int linenum_beg = 0; | |
622 | char *p; | |
623 | ||
624 | if (symtab_list == 0 && partial_symtab_list == 0) | |
625 | error ("No symbol table is loaded. Use the \"symbol-file\" command."); | |
626 | ||
627 | /* Pull in a current source symtab if necessary */ | |
628 | if (arg == 0 || arg[0] == 0) { | |
629 | if (current_source_symtab == 0) | |
630 | select_source_symtab(0); | |
631 | else | |
632 | printf("%s\n", current_source_symtab->filename); | |
633 | return; | |
634 | } | |
635 | arg1 = arg; | |
636 | sals = decode_line_1 (&arg1, 0, 0, 0); | |
637 | ||
638 | if (! sals.nelts) | |
639 | return; /* C++ */ | |
640 | ||
641 | if (sals.nelts > 1) | |
642 | { | |
643 | ambiguous_line_spec (&sals); | |
644 | free (sals.sals); | |
645 | return; | |
646 | } | |
647 | ||
648 | sal = sals.sals[0]; | |
649 | free (sals.sals); | |
650 | ||
651 | /* Record whether the BEG arg is all digits. */ | |
652 | ||
653 | for (p = arg; p != arg1 && *p >= '0' && *p <= '9'; ++p) | |
654 | ; | |
655 | linenum_beg = (p == arg1); | |
656 | ||
657 | /* if line was specified by address, | |
658 | print exactly which line, and which file. | |
659 | In this case, sal.symtab == 0 means address is outside | |
660 | of all known source files, not that user failed to give a filename. */ | |
661 | if (*arg == '*') | |
662 | { | |
663 | if (sal.symtab == 0) | |
664 | error ("No source file for address 0x%x.", sal.pc); | |
665 | sym = find_pc_function (sal.pc); | |
666 | if (sym) | |
667 | printf ("0x%x is in %s (%s, line %d).\n", | |
668 | sal.pc, SYMBOL_NAME (sym), sal.symtab->filename, sal.line); | |
669 | else | |
670 | printf ("0x%x is in %s, line %d.\n", | |
671 | sal.pc, sal.symtab->filename, sal.line); | |
672 | } | |
673 | ||
674 | /* If line was not specified by just a line number, | |
675 | and it does not imply a symtab, it must be an undebuggable symbol | |
676 | which means no source code. */ | |
677 | ||
678 | if (sal.symtab == 0) | |
679 | { | |
680 | if (! linenum_beg) | |
681 | error ("No line number known for %s.", arg); | |
682 | else | |
683 | error ("No default source file yet. Do \"help list\"."); | |
684 | } | |
685 | else | |
686 | { | |
687 | current_source_symtab = sal.symtab; | |
688 | current_source_line = sal.line; | |
689 | first_line_listed = sal.line; | |
690 | } | |
691 | } | |
692 | ||
693 | #define PUSH_STACK_SIZE 32 | |
694 | static struct { | |
695 | struct symtab *symtab; | |
696 | int line; | |
697 | } push_stack[PUSH_STACK_SIZE]; | |
698 | ||
699 | static unsigned int push_stack_ptr; | |
700 | ||
701 | static void | |
702 | push_to_file_command (arg, from_tty) | |
703 | char *arg; | |
704 | int from_tty; | |
705 | { | |
706 | struct symtab *cursym = current_source_symtab; | |
707 | int curline = current_source_line; | |
708 | register unsigned int i; | |
709 | ||
710 | file_command(arg, from_tty); | |
711 | ||
712 | /* if we got back, command was successful */ | |
713 | i = push_stack_ptr; | |
714 | push_stack[i].symtab = cursym; | |
715 | push_stack[i].line = curline; | |
716 | push_stack_ptr = (i + 1) & (PUSH_STACK_SIZE - 1); | |
717 | } | |
718 | ||
719 | static void | |
720 | pop_file_command (arg, from_tty) | |
721 | char *arg; | |
722 | int from_tty; | |
723 | { | |
724 | register unsigned int i = push_stack_ptr; | |
725 | ||
726 | /* if there's something on the stack, pop it & clear the slot. */ | |
727 | i = (i + (PUSH_STACK_SIZE - 1)) & (PUSH_STACK_SIZE - 1); | |
728 | if (push_stack[i].symtab) { | |
729 | current_source_symtab = push_stack[i].symtab; | |
730 | first_line_listed = current_source_line = push_stack[i].line; | |
731 | push_stack[i].symtab = NULL; | |
732 | push_stack_ptr = i; | |
733 | } | |
734 | } | |
735 | ||
736 | ||
737 | static void | |
738 | list_command (arg, from_tty) | |
739 | char *arg; | |
740 | int from_tty; | |
741 | { | |
742 | struct symtabs_and_lines sals, sals_end; | |
743 | struct symtab_and_line sal, sal_end; | |
744 | struct symbol *sym; | |
745 | char *arg1; | |
746 | int no_end = 1; | |
747 | int dummy_end = 0; | |
748 | int dummy_beg = 0; | |
749 | int linenum_beg = 0; | |
750 | char *p; | |
751 | ||
752 | if (symtab_list == 0 && partial_symtab_list == 0) | |
753 | error ("No symbol table is loaded. Use the \"symbol-file\" command."); | |
754 | ||
755 | /* Pull in a current source symtab if necessary */ | |
756 | if (current_source_symtab == 0 && | |
757 | (arg == 0 || arg[0] == '+' || arg[0] == '-')) | |
758 | select_source_symtab (0); | |
759 | ||
760 | /* "l" or "l +" lists next ten lines. */ | |
761 | ||
762 | if (arg == 0 || !strcmp (arg, "+")) | |
763 | { | |
764 | if (current_source_symtab == 0) | |
765 | error ("No default source file yet. Do \"help list\"."); | |
766 | print_source_lines (current_source_symtab, current_source_line, | |
767 | current_source_line + 10, 0); | |
768 | return; | |
769 | } | |
770 | ||
771 | /* "l -" lists previous ten lines, the ones before the ten just listed. */ | |
772 | if (!strcmp (arg, "-")) | |
773 | { | |
774 | if (current_source_symtab == 0) | |
775 | error ("No default source file yet. Do \"help list\"."); | |
776 | print_source_lines (current_source_symtab, | |
777 | max (first_line_listed - 10, 1), | |
778 | first_line_listed, 0); | |
779 | return; | |
780 | } | |
781 | ||
782 | /* Now if there is only one argument, decode it in SAL | |
783 | and set NO_END. | |
784 | If there are two arguments, decode them in SAL and SAL_END | |
785 | and clear NO_END; however, if one of the arguments is blank, | |
786 | set DUMMY_BEG or DUMMY_END to record that fact. */ | |
787 | ||
788 | arg1 = arg; | |
789 | if (*arg1 == ',') | |
790 | dummy_beg = 1; | |
791 | else | |
792 | { | |
793 | sals = decode_line_1 (&arg1, 0, 0, 0); | |
794 | ||
795 | if (! sals.nelts) return; /* C++ */ | |
796 | if (sals.nelts > 1) | |
797 | { | |
798 | ambiguous_line_spec (&sals); | |
799 | free (sals.sals); | |
800 | return; | |
801 | } | |
802 | ||
803 | sal = sals.sals[0]; | |
804 | free (sals.sals); | |
805 | } | |
806 | ||
807 | /* Record whether the BEG arg is all digits. */ | |
808 | ||
809 | for (p = arg; p != arg1 && *p >= '0' && *p <= '9'; p++); | |
810 | linenum_beg = (p == arg1); | |
811 | ||
812 | while (*arg1 == ' ' || *arg1 == '\t') | |
813 | arg1++; | |
814 | if (*arg1 == ',') | |
815 | { | |
816 | no_end = 0; | |
817 | arg1++; | |
818 | while (*arg1 == ' ' || *arg1 == '\t') | |
819 | arg1++; | |
820 | if (*arg1 == 0) | |
821 | dummy_end = 1; | |
822 | else | |
823 | { | |
824 | if (dummy_beg) | |
825 | sals_end = decode_line_1 (&arg1, 0, 0, 0); | |
826 | else | |
827 | sals_end = decode_line_1 (&arg1, 0, sal.symtab, sal.line); | |
828 | if (sals_end.nelts == 0) | |
829 | return; | |
830 | if (sals_end.nelts > 1) | |
831 | { | |
832 | ambiguous_line_spec (&sals_end); | |
833 | free (sals_end.sals); | |
834 | return; | |
835 | } | |
836 | sal_end = sals_end.sals[0]; | |
837 | free (sals_end.sals); | |
838 | } | |
839 | } | |
840 | ||
841 | if (*arg1) | |
842 | error ("Junk at end of line specification."); | |
843 | ||
844 | if (!no_end && !dummy_beg && !dummy_end | |
845 | && sal.symtab != sal_end.symtab) | |
846 | error ("Specified start and end are in different files."); | |
847 | if (dummy_beg && dummy_end) | |
848 | error ("Two empty args do not say what lines to list."); | |
849 | ||
850 | /* if line was specified by address, | |
851 | first print exactly which line, and which file. | |
852 | In this case, sal.symtab == 0 means address is outside | |
853 | of all known source files, not that user failed to give a filename. */ | |
854 | if (*arg == '*') | |
855 | { | |
856 | if (sal.symtab == 0) | |
857 | error ("No source file for address 0x%x.", sal.pc); | |
858 | sym = find_pc_function (sal.pc); | |
859 | if (sym) | |
860 | printf ("0x%x is in %s (%s, line %d).\n", | |
861 | sal.pc, SYMBOL_NAME (sym), sal.symtab->filename, sal.line); | |
862 | else | |
863 | printf ("0x%x is in %s, line %d.\n", | |
864 | sal.pc, sal.symtab->filename, sal.line); | |
865 | } | |
866 | ||
867 | /* If line was not specified by just a line number, | |
868 | and it does not imply a symtab, it must be an undebuggable symbol | |
869 | which means no source code. */ | |
870 | ||
871 | if (! linenum_beg && sal.symtab == 0) | |
872 | error ("No line number known for %s.", arg); | |
873 | ||
874 | /* If this command is repeated with RET, | |
875 | turn it into the no-arg variant. */ | |
876 | ||
877 | if (from_tty) | |
878 | *arg = 0; | |
879 | ||
880 | if (dummy_beg && sal_end.symtab == 0) | |
881 | error ("No default source file yet. Do \"help list\"."); | |
882 | if (dummy_beg) | |
883 | print_source_lines (sal_end.symtab, max (sal_end.line - 9, 1), | |
884 | sal_end.line + 1, 0); | |
885 | else if (sal.symtab == 0) | |
886 | error ("No default source file yet. Do \"help list\"."); | |
887 | else if (no_end) | |
888 | print_source_lines (sal.symtab, max (sal.line - 5, 1), sal.line + 5, 0); | |
889 | else | |
890 | print_source_lines (sal.symtab, sal.line, | |
891 | dummy_end ? sal.line + 10 : sal_end.line + 1, | |
892 | 0); | |
893 | } | |
894 | \f | |
895 | /* Print info on range of pc's in a specified line. */ | |
896 | ||
897 | static void | |
898 | line_info (arg, from_tty) | |
899 | char *arg; | |
900 | int from_tty; | |
901 | { | |
902 | struct symtabs_and_lines sals; | |
903 | struct symtab_and_line sal; | |
904 | int start_pc, end_pc; | |
905 | int i; | |
906 | ||
907 | if (arg == 0) | |
908 | { | |
909 | sal.symtab = current_source_symtab; | |
910 | sal.line = last_line_listed; | |
911 | sals.nelts = 1; | |
912 | sals.sals = (struct symtab_and_line *) | |
913 | xmalloc (sizeof (struct symtab_and_line)); | |
914 | sals.sals[0] = sal; | |
915 | } | |
916 | else | |
917 | { | |
918 | sals = decode_line_spec_1 (arg, 0); | |
919 | ||
920 | /* If this command is repeated with RET, | |
921 | turn it into the no-arg variant. */ | |
922 | if (from_tty) | |
923 | *arg = 0; | |
924 | } | |
925 | ||
926 | /* C++ More than one line may have been specified, as when the user | |
927 | specifies an overloaded function name. Print info on them all. */ | |
928 | for (i = 0; i < sals.nelts; i++) | |
929 | { | |
930 | sal = sals.sals[i]; | |
931 | ||
932 | if (sal.symtab == 0) | |
933 | error ("No source file specified."); | |
934 | ||
935 | if (sal.line > 0 | |
936 | && find_line_pc_range (sal.symtab, sal.line, &start_pc, &end_pc)) | |
937 | { | |
938 | if (start_pc == end_pc) | |
939 | printf ("Line %d of \"%s\" is at pc 0x%x but contains no code.\n", | |
940 | sal.line, sal.symtab->filename, start_pc); | |
941 | else | |
942 | printf ("Line %d of \"%s\" starts at pc 0x%x and ends at 0x%x.\n", | |
943 | sal.line, sal.symtab->filename, start_pc, end_pc); | |
944 | /* x/i should display this line's code. */ | |
945 | set_next_address (start_pc); | |
946 | /* Repeating "info line" should do the following line. */ | |
947 | last_line_listed = sal.line + 1; | |
948 | } | |
949 | else | |
950 | printf ("Line number %d is out of range for \"%s\".\n", | |
951 | sal.line, sal.symtab->filename); | |
952 | } | |
953 | } | |
954 | \f | |
955 | /* Commands to search the source file for a regexp. */ | |
956 | ||
957 | static void | |
958 | forward_search_command (regex, from_tty) | |
959 | char *regex; | |
960 | { | |
961 | register int c; | |
962 | register int desc; | |
963 | register FILE *stream; | |
964 | int line = last_line_listed + 1; | |
965 | char *msg; | |
966 | ||
967 | msg = (char *) re_comp (regex); | |
968 | if (msg) | |
969 | error (msg); | |
970 | ||
971 | if (current_source_symtab == 0) | |
972 | select_source_symtab (0); | |
973 | ||
974 | /* Search from last_line_listed+1 in current_source_symtab */ | |
975 | ||
976 | desc = openp (source_path, 0, current_source_symtab->filename, | |
977 | O_RDONLY, 0, ¤t_source_symtab->fullname); | |
978 | if (desc < 0) | |
979 | perror_with_name (current_source_symtab->filename); | |
980 | ||
981 | if (current_source_symtab->line_charpos == 0) | |
982 | find_source_lines (current_source_symtab, desc); | |
983 | ||
984 | if (line < 1 || line > current_source_symtab->nlines) | |
985 | { | |
986 | close (desc); | |
987 | error ("Expression not found"); | |
988 | } | |
989 | ||
990 | if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) | |
991 | { | |
992 | close (desc); | |
993 | perror_with_name (current_source_symtab->filename); | |
994 | } | |
995 | ||
996 | stream = fdopen (desc, "r"); | |
997 | clearerr (stream); | |
998 | while (1) { | |
999 | char buf[4096]; /* Should be reasonable??? */ | |
1000 | register char *p = buf; | |
1001 | ||
1002 | c = fgetc (stream); | |
1003 | if (c == EOF) | |
1004 | break; | |
1005 | do { | |
1006 | *p++ = c; | |
1007 | } while (c != '\n' && (c = fgetc (stream)) >= 0); | |
1008 | ||
1009 | /* we now have a source line in buf, null terminate and match */ | |
1010 | *p = 0; | |
1011 | if (re_exec (buf) > 0) | |
1012 | { | |
1013 | /* Match! */ | |
1014 | fclose (stream); | |
1015 | print_source_lines (current_source_symtab, | |
1016 | line, line+1, 0); | |
1017 | current_source_line = max (line - 5, 1); | |
1018 | return; | |
1019 | } | |
1020 | line++; | |
1021 | } | |
1022 | ||
1023 | printf ("Expression not found\n"); | |
1024 | fclose (stream); | |
1025 | } | |
1026 | ||
1027 | static void | |
1028 | reverse_search_command (regex, from_tty) | |
1029 | char *regex; | |
1030 | { | |
1031 | register int c; | |
1032 | register int desc; | |
1033 | register FILE *stream; | |
1034 | int line = last_line_listed - 1; | |
1035 | char *msg; | |
1036 | ||
1037 | msg = (char *) re_comp (regex); | |
1038 | if (msg) | |
1039 | error (msg); | |
1040 | ||
1041 | if (current_source_symtab == 0) | |
1042 | select_source_symtab (0); | |
1043 | ||
1044 | /* Search from last_line_listed-1 in current_source_symtab */ | |
1045 | ||
1046 | desc = openp (source_path, 0, current_source_symtab->filename, | |
1047 | O_RDONLY, 0, ¤t_source_symtab->fullname); | |
1048 | if (desc < 0) | |
1049 | perror_with_name (current_source_symtab->filename); | |
1050 | ||
1051 | if (current_source_symtab->line_charpos == 0) | |
1052 | find_source_lines (current_source_symtab, desc); | |
1053 | ||
1054 | if (line < 1 || line > current_source_symtab->nlines) | |
1055 | { | |
1056 | close (desc); | |
1057 | error ("Expression not found"); | |
1058 | } | |
1059 | ||
1060 | if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0) | |
1061 | { | |
1062 | close (desc); | |
1063 | perror_with_name (current_source_symtab->filename); | |
1064 | } | |
1065 | ||
1066 | stream = fdopen (desc, "r"); | |
1067 | clearerr (stream); | |
1068 | while (1) | |
1069 | { | |
1070 | char buf[4096]; /* Should be reasonable??? */ | |
1071 | register char *p = buf; | |
1072 | ||
1073 | c = fgetc (stream); | |
1074 | if (c == EOF) | |
1075 | break; | |
1076 | do { | |
1077 | *p++ = c; | |
1078 | } while (c != '\n' && (c = fgetc (stream)) >= 0); | |
1079 | ||
1080 | /* We now have a source line in buf; null terminate and match. */ | |
1081 | *p = 0; | |
1082 | if (re_exec (buf) > 0) | |
1083 | { | |
1084 | /* Match! */ | |
1085 | fclose (stream); | |
1086 | print_source_lines (current_source_symtab, | |
1087 | line, line+1, 0); | |
1088 | current_source_line = max (line - 5, 1); | |
1089 | return; | |
1090 | } | |
1091 | line--; | |
1092 | if (fseek (stream, current_source_symtab->line_charpos[line - 1], 0) < 0) | |
1093 | { | |
1094 | fclose (stream); | |
1095 | perror_with_name (current_source_symtab->filename); | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | printf ("Expression not found\n"); | |
1100 | fclose (stream); | |
1101 | return; | |
1102 | } | |
1103 | \f | |
1104 | void | |
1105 | _initialize_source () | |
1106 | { | |
1107 | current_source_symtab = 0; | |
1108 | init_source_path (); | |
1109 | ||
1110 | add_com ("directory", class_files, directory_command, | |
1111 | "Add directory DIR to end of search path for source files.\n\ | |
1112 | With no argument, reset the search path to just the working directory\n\ | |
1113 | and forget cached info on line positions in source files."); | |
1114 | ||
1115 | add_info ("directories", directories_info, | |
1116 | "Current search path for finding source files."); | |
1117 | ||
1118 | add_info ("line", line_info, | |
1119 | "Core addresses of the code for a source line.\n\ | |
1120 | Line can be specified as\n\ | |
1121 | LINENUM, to list around that line in current file,\n\ | |
1122 | FILE:LINENUM, to list around that line in that file,\n\ | |
1123 | FUNCTION, to list around beginning of that function,\n\ | |
1124 | FILE:FUNCTION, to distinguish among like-named static functions.\n\ | |
1125 | Default is to describe the last source line that was listed.\n\n\ | |
1126 | This sets the default address for \"x\" to the line's first instruction\n\ | |
1127 | so that \"x/i\" suffices to start examining the machine code.\n\ | |
1128 | The address is also stored as the value of \"$_\"."); | |
1129 | ||
1130 | add_com ("forward-search", class_files, forward_search_command, | |
1131 | "Search for regular expression (see regex(3)) from last line listed."); | |
1132 | add_com_alias ("search", "forward-search", class_files, 0); | |
1133 | ||
1134 | add_com ("reverse-search", class_files, reverse_search_command, | |
1135 | "Search backward for regular expression (see regex(3)) from last line listed."); | |
1136 | ||
1137 | add_com ("list", class_files, list_command, | |
1138 | "List specified function or line.\n\ | |
1139 | With no argument, lists ten more lines after or around previous listing.\n\ | |
1140 | \"list -\" lists the ten lines before a previous ten-line listing.\n\ | |
1141 | One argument specifies a line, and ten lines are listed around that line.\n\ | |
1142 | Two arguments with comma between specify starting and ending lines to list.\n\ | |
1143 | Lines can be specified in these ways:\n\ | |
1144 | LINENUM, to list around that line in current file,\n\ | |
1145 | FILE:LINENUM, to list around that line in that file,\n\ | |
1146 | FUNCTION, to list around beginning of that function,\n\ | |
1147 | FILE:FUNCTION, to distinguish among like-named static functions.\n\ | |
1148 | *ADDRESS, to list around the line containing that address.\n\ | |
1149 | With two args if one is empty it stands for ten lines away from the other arg."); | |
1150 | add_com ("file", class_files, file_command, | |
1151 | "Select current file, function and line for display or list.\n\ | |
1152 | Specification can have the form:\n\ | |
1153 | LINENUM, to select that line in current file,\n\ | |
1154 | FILE:LINENUM, to select that line in that file,\n\ | |
1155 | FUNCTION, to select beginning of that function,\n\ | |
1156 | FILE:FUNCTION, to distinguish among like-named static functions.\n\ | |
1157 | *ADDRESS, to select the line containing that address."); | |
1158 | add_com ("push-to-file", class_files, push_to_file_command, | |
1159 | "Like \"file\" command but remembers current file & line on a stack.\n\ | |
1160 | Can later return to current file with \"pop-file\" command.\n\ | |
1161 | Up to 32 file positions can be pushed on stack."); | |
1162 | add_com ("pop-file", class_files, pop_file_command, | |
1163 | "Pops back to file position saved by most recent \"push-to-file\".\n\ | |
1164 | If everything has been popped from stack, command does nothing."); | |
1165 | } | |
1166 |