1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1986-2018 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program 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 3 of the License, or
9 (at your option) any later version.
11 This program 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.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "arch-utils.h"
22 #include "expression.h"
29 #include "filestuff.h"
31 #include <sys/types.h>
34 #include "gdb_regex.h"
40 #include "filenames.h" /* for DOSish file names */
41 #include "completer.h"
43 #include "readline/readline.h"
44 #include "common/enum-flags.h"
46 #include "common/pathstuff.h"
48 #define OPEN_MODE (O_RDONLY | O_BINARY)
49 #define FDOPEN_MODE FOPEN_RB
51 /* Prototypes for local functions. */
53 static int get_filename_and_charpos (struct symtab *, char **);
55 /* Path of directories to search for source files.
56 Same format as the PATH environment variable's value. */
60 /* Support for source path substitution commands. */
62 struct substitute_path_rule
66 struct substitute_path_rule *next;
69 static struct substitute_path_rule *substitute_path_rules = NULL;
71 /* Symtab of default file for listing lines of. */
73 static struct symtab *current_source_symtab;
75 /* Default next line to list. */
77 static int current_source_line;
79 static struct program_space *current_source_pspace;
81 /* Default number of lines to print with commands like "list".
82 This is based on guessing how many long (i.e. more than chars_per_line
83 characters) lines there will be. To be completely correct, "list"
84 and friends should be rewritten to count characters and see where
85 things are wrapping, but that would be a fair amount of work. */
87 static int lines_to_list = 10;
89 show_lines_to_list (struct ui_file *file, int from_tty,
90 struct cmd_list_element *c, const char *value)
92 fprintf_filtered (file,
93 _("Number of source lines gdb "
94 "will list by default is %s.\n"),
98 /* Possible values of 'set filename-display'. */
99 static const char filename_display_basename[] = "basename";
100 static const char filename_display_relative[] = "relative";
101 static const char filename_display_absolute[] = "absolute";
103 static const char *const filename_display_kind_names[] = {
104 filename_display_basename,
105 filename_display_relative,
106 filename_display_absolute,
110 static const char *filename_display_string = filename_display_relative;
113 show_filename_display_string (struct ui_file *file, int from_tty,
114 struct cmd_list_element *c, const char *value)
116 fprintf_filtered (file, _("Filenames are displayed as \"%s\".\n"), value);
119 /* Line number of last line printed. Default for various commands.
120 current_source_line is usually, but not always, the same as this. */
122 static int last_line_listed;
124 /* First line number listed by last listing command. If 0, then no
125 source lines have yet been listed since the last time the current
126 source line was changed. */
128 static int first_line_listed;
130 /* Saves the name of the last source file visited and a possible error code.
131 Used to prevent repeating annoying "No such file or directories" msgs. */
133 static struct symtab *last_source_visited = NULL;
134 static int last_source_error = 0;
136 /* Return the first line listed by print_source_lines.
137 Used by command interpreters to request listing from
141 get_first_line_listed (void)
143 return first_line_listed;
146 /* Clear line listed range. This makes the next "list" center the
147 printed source lines around the current source line. */
150 clear_lines_listed_range (void)
152 first_line_listed = 0;
153 last_line_listed = 0;
156 /* Return the default number of lines to print with commands like the
157 cli "list". The caller of print_source_lines must use this to
158 calculate the end line and use it in the call to print_source_lines
159 as it does not automatically use this value. */
162 get_lines_to_list (void)
164 return lines_to_list;
167 /* Return the current source file for listing and next line to list.
168 NOTE: The returned sal pc and end fields are not valid. */
170 struct symtab_and_line
171 get_current_source_symtab_and_line (void)
173 symtab_and_line cursal;
175 cursal.pspace = current_source_pspace;
176 cursal.symtab = current_source_symtab;
177 cursal.line = current_source_line;
184 /* If the current source file for listing is not set, try and get a default.
185 Usually called before get_current_source_symtab_and_line() is called.
186 It may err out if a default cannot be determined.
187 We must be cautious about where it is called, as it can recurse as the
188 process of determining a new default may call the caller!
189 Use get_current_source_symtab_and_line only to get whatever
190 we have without erroring out or trying to get a default. */
193 set_default_source_symtab_and_line (void)
195 if (!have_full_symbols () && !have_partial_symbols ())
196 error (_("No symbol table is loaded. Use the \"file\" command."));
198 /* Pull in a current source symtab if necessary. */
199 if (current_source_symtab == 0)
200 select_source_symtab (0);
203 /* Return the current default file for listing and next line to list
204 (the returned sal pc and end fields are not valid.)
205 and set the current default to whatever is in SAL.
206 NOTE: The returned sal pc and end fields are not valid. */
208 struct symtab_and_line
209 set_current_source_symtab_and_line (const symtab_and_line &sal)
211 symtab_and_line cursal;
213 cursal.pspace = current_source_pspace;
214 cursal.symtab = current_source_symtab;
215 cursal.line = current_source_line;
219 current_source_pspace = sal.pspace;
220 current_source_symtab = sal.symtab;
221 current_source_line = sal.line;
223 /* Force the next "list" to center around the current line. */
224 clear_lines_listed_range ();
229 /* Reset any information stored about a default file and line to print. */
232 clear_current_source_symtab_and_line (void)
234 current_source_symtab = 0;
235 current_source_line = 0;
238 /* Set the source file default for the "list" command to be S.
240 If S is NULL, and we don't have a default, find one. This
241 should only be called when the user actually tries to use the
242 default, since we produce an error if we can't find a reasonable
243 default. Also, since this can cause symbols to be read, doing it
244 before we need to would make things slower than necessary. */
247 select_source_symtab (struct symtab *s)
250 struct compunit_symtab *cu;
254 current_source_symtab = s;
255 current_source_line = 1;
256 current_source_pspace = SYMTAB_PSPACE (s);
260 if (current_source_symtab)
263 /* Make the default place to list be the function `main'
265 if (lookup_symbol (main_name (), 0, VAR_DOMAIN, 0).symbol)
267 std::vector<symtab_and_line> sals
268 = decode_line_with_current_source (main_name (),
269 DECODE_LINE_FUNFIRSTLINE);
270 const symtab_and_line &sal = sals[0];
271 current_source_pspace = sal.pspace;
272 current_source_symtab = sal.symtab;
273 current_source_line = std::max (sal.line - (lines_to_list - 1), 1);
274 if (current_source_symtab)
278 /* Alright; find the last file in the symtab list (ignoring .h's
279 and namespace symtabs). */
281 current_source_line = 1;
283 ALL_FILETABS (ofp, cu, s)
285 const char *name = s->filename;
286 int len = strlen (name);
288 if (!(len > 2 && (strcmp (&name[len - 2], ".h") == 0
289 || strcmp (name, "<<C++-namespaces>>") == 0)))
291 current_source_pspace = current_program_space;
292 current_source_symtab = s;
296 if (current_source_symtab)
302 s = ofp->sf->qf->find_last_source_symtab (ofp);
304 current_source_symtab = s;
306 if (current_source_symtab)
309 error (_("Can't find a default source file"));
312 /* Handler for "set directories path-list" command.
313 "set dir mumble" doesn't prepend paths, it resets the entire
314 path list. The theory is that set(show(dir)) should be a no-op. */
317 set_directories_command (const char *args,
318 int from_tty, struct cmd_list_element *c)
320 /* This is the value that was set.
321 It needs to be processed to maintain $cdir:$cwd and remove dups. */
322 char *set_path = source_path;
324 /* We preserve the invariant that $cdir:$cwd begins life at the end of
325 the list by calling init_source_path. If they appear earlier in
326 SET_PATH then mod_path will move them appropriately.
327 mod_path will also remove duplicates. */
329 if (*set_path != '\0')
330 mod_path (set_path, &source_path);
335 /* Print the list of source directories.
336 This is used by the "ld" command, so it has the signature of a command
340 show_directories_1 (char *ignore, int from_tty)
342 puts_filtered ("Source directories searched: ");
343 puts_filtered (source_path);
344 puts_filtered ("\n");
347 /* Handler for "show directories" command. */
350 show_directories_command (struct ui_file *file, int from_tty,
351 struct cmd_list_element *c, const char *value)
353 show_directories_1 (NULL, from_tty);
356 /* Forget line positions and file names for the symtabs in a
357 particular objfile. */
360 forget_cached_source_info_for_objfile (struct objfile *objfile)
362 struct compunit_symtab *cu;
365 ALL_OBJFILE_FILETABS (objfile, cu, s)
367 if (s->line_charpos != NULL)
369 xfree (s->line_charpos);
370 s->line_charpos = NULL;
372 if (s->fullname != NULL)
380 objfile->sf->qf->forget_cached_source_info (objfile);
383 /* Forget what we learned about line positions in source files, and
384 which directories contain them; must check again now since files
385 may be found in a different directory now. */
388 forget_cached_source_info (void)
390 struct program_space *pspace;
391 struct objfile *objfile;
394 ALL_PSPACE_OBJFILES (pspace, objfile)
396 forget_cached_source_info_for_objfile (objfile);
399 last_source_visited = NULL;
403 init_source_path (void)
407 xsnprintf (buf, sizeof (buf), "$cdir%c$cwd", DIRNAME_SEPARATOR);
408 source_path = xstrdup (buf);
409 forget_cached_source_info ();
412 /* Add zero or more directories to the front of the source path. */
415 directory_command (const char *dirname, int from_tty)
418 /* FIXME, this goes to "delete dir"... */
421 if (!from_tty || query (_("Reinitialize source path to empty? ")))
429 mod_path (dirname, &source_path);
430 forget_cached_source_info ();
433 show_directories_1 ((char *) 0, from_tty);
436 /* Add a path given with the -d command line switch.
437 This will not be quoted so we must not treat spaces as separators. */
440 directory_switch (const char *dirname, int from_tty)
442 add_path (dirname, &source_path, 0);
445 /* Add zero or more directories to the front of an arbitrary path. */
448 mod_path (const char *dirname, char **which_path)
450 add_path (dirname, which_path, 1);
453 /* Workhorse of mod_path. Takes an extra argument to determine
454 if dirname should be parsed for separators that indicate multiple
455 directories. This allows for interfaces that pre-parse the dirname
456 and allow specification of traditional separator characters such
460 add_path (const char *dirname, char **which_path, int parse_separators)
462 char *old = *which_path;
464 std::vector<gdb::unique_xmalloc_ptr<char>> dir_vec;
469 if (parse_separators)
471 /* This will properly parse the space and tab separators
472 and any quotes that may exist. */
473 gdb_argv argv (dirname);
475 for (char *arg : argv)
476 dirnames_to_char_ptr_vec_append (&dir_vec, arg);
479 dir_vec.emplace_back (xstrdup (dirname));
481 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
483 for (const gdb::unique_xmalloc_ptr<char> &name_up : dir_vec)
485 char *name = name_up.get ();
489 /* Spaces and tabs will have been removed by buildargv().
490 NAME is the start of the directory.
491 P is the '\0' following the end. */
492 p = name + strlen (name);
494 while (!(IS_DIR_SEPARATOR (*name) && p <= name + 1) /* "/" */
495 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
496 /* On MS-DOS and MS-Windows, h:\ is different from h: */
497 && !(p == name + 3 && name[1] == ':') /* "d:/" */
499 && IS_DIR_SEPARATOR (p[-1]))
500 /* Sigh. "foo/" => "foo" */
504 while (p > name && p[-1] == '.')
508 /* "." => getwd (). */
509 name = current_directory;
512 else if (p > name + 1 && IS_DIR_SEPARATOR (p[-2]))
522 /* "...foo/." => "...foo". */
533 name = tilde_expand (name);
534 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
535 else if (IS_ABSOLUTE_PATH (name) && p == name + 2) /* "d:" => "d:." */
536 name = concat (name, ".", (char *)NULL);
538 else if (!IS_ABSOLUTE_PATH (name) && name[0] != '$')
539 name = concat (current_directory, SLASH_STRING, name, (char *)NULL);
541 name = savestring (name, p - name);
542 make_cleanup (xfree, name);
544 /* Unless it's a variable, check existence. */
547 /* These are warnings, not errors, since we don't want a
548 non-existent directory in a .gdbinit file to stop processing
549 of the .gdbinit file.
551 Whether they get added to the path is more debatable. Current
552 answer is yes, in case the user wants to go make the directory
553 or whatever. If the directory continues to not exist/not be
554 a directory/etc, then having them in the path should be
556 if (stat (name, &st) < 0)
558 int save_errno = errno;
560 fprintf_unfiltered (gdb_stderr, "Warning: ");
561 print_sys_errmsg (name, save_errno);
563 else if ((st.st_mode & S_IFMT) != S_IFDIR)
564 warning (_("%s is not a directory."), name);
569 unsigned int len = strlen (name);
575 /* FIXME: we should use realpath() or its work-alike
576 before comparing. Then all the code above which
577 removes excess slashes and dots could simply go away. */
578 if (!filename_ncmp (p, name, len)
579 && (p[len] == '\0' || p[len] == DIRNAME_SEPARATOR))
581 /* Found it in the search path, remove old copy. */
584 /* Back over leading separator. */
587 if (prefix > p - *which_path)
589 /* Same dir twice in one cmd. */
592 /* Copy from next '\0' or ':'. */
593 memmove (p, &p[len + 1], strlen (&p[len + 1]) + 1);
595 p = strchr (p, DIRNAME_SEPARATOR);
602 tinybuf[0] = DIRNAME_SEPARATOR;
605 /* If we have already tacked on a name(s) in this command,
606 be sure they stay on the front as we tack on some
614 temp = concat (old, tinybuf, name, (char *)NULL);
616 *which_path = concat (temp, "", &old[prefix], (char *) NULL);
617 prefix = strlen (temp);
622 *which_path = concat (name, (old[0] ? tinybuf : old),
624 prefix = strlen (name);
633 do_cleanups (back_to);
638 info_source_command (const char *ignore, int from_tty)
640 struct symtab *s = current_source_symtab;
641 struct compunit_symtab *cust;
645 printf_filtered (_("No current source file.\n"));
649 cust = SYMTAB_COMPUNIT (s);
650 printf_filtered (_("Current source file is %s\n"), s->filename);
651 if (SYMTAB_DIRNAME (s) != NULL)
652 printf_filtered (_("Compilation directory is %s\n"), SYMTAB_DIRNAME (s));
654 printf_filtered (_("Located in %s\n"), s->fullname);
656 printf_filtered (_("Contains %d line%s.\n"), s->nlines,
657 s->nlines == 1 ? "" : "s");
659 printf_filtered (_("Source language is %s.\n"), language_str (s->language));
660 printf_filtered (_("Producer is %s.\n"),
661 COMPUNIT_PRODUCER (cust) != NULL
662 ? COMPUNIT_PRODUCER (cust) : _("unknown"));
663 printf_filtered (_("Compiled with %s debugging format.\n"),
664 COMPUNIT_DEBUGFORMAT (cust));
665 printf_filtered (_("%s preprocessor macro info.\n"),
666 COMPUNIT_MACRO_TABLE (cust) != NULL
667 ? "Includes" : "Does not include");
671 /* Open a file named STRING, searching path PATH (dir names sep by some char)
672 using mode MODE in the calls to open. You cannot use this function to
673 create files (O_CREAT).
675 OPTS specifies the function behaviour in specific cases.
677 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
678 (ie pretend the first element of PATH is "."). This also indicates
679 that, unless OPF_SEARCH_IN_PATH is also specified, a slash in STRING
680 disables searching of the path (this is so that "exec-file ./foo" or
681 "symbol-file ./foo" insures that you get that particular version of
682 foo or an error message).
684 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
685 searched in path (we usually want this for source files but not for
688 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
689 the actual file opened (this string will always start with a "/"). We
690 have to take special pains to avoid doubling the "/" between the directory
691 and the file, sigh! Emacs gets confuzzed by this when we print the
694 If OPTS has OPF_RETURN_REALPATH set return FILENAME_OPENED resolved by
695 gdb_realpath. Even without OPF_RETURN_REALPATH this function still returns
696 filename starting with "/". If FILENAME_OPENED is NULL this option has no
699 If a file is found, return the descriptor.
700 Otherwise, return -1, with errno set for the last name we tried to open. */
702 /* >>>> This should only allow files of certain types,
703 >>>> eg executable, non-directory. */
705 openp (const char *path, openp_flags opts, const char *string,
706 int mode, gdb::unique_xmalloc_ptr<char> *filename_opened)
711 /* The errno set for the last name we tried to open (and
714 std::vector<gdb::unique_xmalloc_ptr<char>> dir_vec;
716 /* The open syscall MODE parameter is not specified. */
717 gdb_assert ((mode & O_CREAT) == 0);
718 gdb_assert (string != NULL);
720 /* A file with an empty name cannot possibly exist. Report a failure
721 without further checking.
723 This is an optimization which also defends us against buggy
724 implementations of the "stat" function. For instance, we have
725 noticed that a MinGW debugger built on Windows XP 32bits crashes
726 when the debugger is started with an empty argument. */
727 if (string[0] == '\0')
738 if ((opts & OPF_TRY_CWD_FIRST) || IS_ABSOLUTE_PATH (string))
740 int i, reg_file_errno;
742 if (is_regular_file (string, ®_file_errno))
744 filename = (char *) alloca (strlen (string) + 1);
745 strcpy (filename, string);
746 fd = gdb_open_cloexec (filename, mode, 0);
755 last_errno = reg_file_errno;
758 if (!(opts & OPF_SEARCH_IN_PATH))
759 for (i = 0; string[i]; i++)
760 if (IS_DIR_SEPARATOR (string[i]))
764 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
765 if (HAS_DRIVE_SPEC (string))
766 string = STRIP_DRIVE_SPEC (string);
768 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
769 while (IS_DIR_SEPARATOR(string[0]))
773 while (string[0] == '.' && IS_DIR_SEPARATOR (string[1]))
776 alloclen = strlen (path) + strlen (string) + 2;
777 filename = (char *) alloca (alloclen);
781 dir_vec = dirnames_to_char_ptr_vec (path);
783 for (const gdb::unique_xmalloc_ptr<char> &dir_up : dir_vec)
785 char *dir = dir_up.get ();
786 size_t len = strlen (dir);
789 if (strcmp (dir, "$cwd") == 0)
791 /* Name is $cwd -- insert current directory name instead. */
794 /* First, realloc the filename buffer if too short. */
795 len = strlen (current_directory);
796 newlen = len + strlen (string) + 2;
797 if (newlen > alloclen)
800 filename = (char *) alloca (alloclen);
802 strcpy (filename, current_directory);
804 else if (strchr(dir, '~'))
806 /* See whether we need to expand the tilde. */
809 gdb::unique_xmalloc_ptr<char> tilde_expanded (tilde_expand (dir));
811 /* First, realloc the filename buffer if too short. */
812 len = strlen (tilde_expanded.get ());
813 newlen = len + strlen (string) + 2;
814 if (newlen > alloclen)
817 filename = (char *) alloca (alloclen);
819 strcpy (filename, tilde_expanded.get ());
823 /* Normal file name in path -- just use it. */
824 strcpy (filename, dir);
826 /* Don't search $cdir. It's also a magic path like $cwd, but we
827 don't have enough information to expand it. The user *could*
828 have an actual directory named '$cdir' but handling that would
829 be confusing, it would mean different things in different
830 contexts. If the user really has '$cdir' one can use './$cdir'.
831 We can get $cdir when loading scripts. When loading source files
832 $cdir must have already been expanded to the correct value. */
833 if (strcmp (dir, "$cdir") == 0)
837 /* Remove trailing slashes. */
838 while (len > 0 && IS_DIR_SEPARATOR (filename[len - 1]))
841 strcat (filename + len, SLASH_STRING);
842 strcat (filename, string);
844 if (is_regular_file (filename, ®_file_errno))
846 fd = gdb_open_cloexec (filename, mode, 0);
852 last_errno = reg_file_errno;
858 /* If a file was opened, canonicalize its filename. */
860 filename_opened->reset (NULL);
861 else if ((opts & OPF_RETURN_REALPATH) != 0)
862 *filename_opened = gdb_realpath (filename);
864 *filename_opened = gdb_abspath (filename);
872 /* This is essentially a convenience, for clients that want the behaviour
873 of openp, using source_path, but that really don't want the file to be
874 opened but want instead just to know what the full pathname is (as
875 qualified against source_path).
877 The current working directory is searched first.
879 If the file was found, this function returns 1, and FULL_PATHNAME is
880 set to the fully-qualified pathname.
882 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
884 source_full_path_of (const char *filename,
885 gdb::unique_xmalloc_ptr<char> *full_pathname)
889 fd = openp (source_path,
890 OPF_TRY_CWD_FIRST | OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH,
891 filename, O_RDONLY, full_pathname);
894 full_pathname->reset (NULL);
902 /* Return non-zero if RULE matches PATH, that is if the rule can be
906 substitute_path_rule_matches (const struct substitute_path_rule *rule,
909 const int from_len = strlen (rule->from);
910 const int path_len = strlen (path);
912 if (path_len < from_len)
915 /* The substitution rules are anchored at the start of the path,
916 so the path should start with rule->from. */
918 if (filename_ncmp (path, rule->from, from_len) != 0)
921 /* Make sure that the region in the path that matches the substitution
922 rule is immediately followed by a directory separator (or the end of
923 string character). */
925 if (path[from_len] != '\0' && !IS_DIR_SEPARATOR (path[from_len]))
931 /* Find the substitute-path rule that applies to PATH and return it.
932 Return NULL if no rule applies. */
934 static struct substitute_path_rule *
935 get_substitute_path_rule (const char *path)
937 struct substitute_path_rule *rule = substitute_path_rules;
939 while (rule != NULL && !substitute_path_rule_matches (rule, path))
945 /* If the user specified a source path substitution rule that applies
946 to PATH, then apply it and return the new path.
948 Return NULL if no substitution rule was specified by the user,
949 or if no rule applied to the given PATH. */
951 gdb::unique_xmalloc_ptr<char>
952 rewrite_source_path (const char *path)
954 const struct substitute_path_rule *rule = get_substitute_path_rule (path);
961 from_len = strlen (rule->from);
963 /* Compute the rewritten path and return it. */
966 (char *) xmalloc (strlen (path) + 1 + strlen (rule->to) - from_len);
967 strcpy (new_path, rule->to);
968 strcat (new_path, path + from_len);
970 return gdb::unique_xmalloc_ptr<char> (new_path);
974 find_and_open_source (const char *filename,
976 gdb::unique_xmalloc_ptr<char> *fullname)
978 char *path = source_path;
982 /* Quick way out if we already know its full name. */
986 /* The user may have requested that source paths be rewritten
987 according to substitution rules he provided. If a substitution
988 rule applies to this path, then apply it. */
989 gdb::unique_xmalloc_ptr<char> rewritten_fullname
990 = rewrite_source_path (fullname->get ());
992 if (rewritten_fullname != NULL)
993 *fullname = std::move (rewritten_fullname);
995 result = gdb_open_cloexec (fullname->get (), OPEN_MODE, 0);
998 *fullname = gdb_realpath (fullname->get ());
1002 /* Didn't work -- free old one, try again. */
1003 fullname->reset (NULL);
1006 gdb::unique_xmalloc_ptr<char> rewritten_dirname;
1007 if (dirname != NULL)
1009 /* If necessary, rewrite the compilation directory name according
1010 to the source path substitution rules specified by the user. */
1012 rewritten_dirname = rewrite_source_path (dirname);
1014 if (rewritten_dirname != NULL)
1015 dirname = rewritten_dirname.get ();
1017 /* Replace a path entry of $cdir with the compilation directory
1020 /* We cast strstr's result in case an ANSIhole has made it const,
1021 which produces a "required warning" when assigned to a nonconst. */
1022 p = (char *) strstr (source_path, "$cdir");
1023 if (p && (p == path || p[-1] == DIRNAME_SEPARATOR)
1024 && (p[cdir_len] == DIRNAME_SEPARATOR || p[cdir_len] == '\0'))
1029 alloca (strlen (source_path) + 1 + strlen (dirname) + 1);
1030 len = p - source_path;
1031 strncpy (path, source_path, len); /* Before $cdir */
1032 strcpy (path + len, dirname); /* new stuff */
1033 strcat (path + len, source_path + len + cdir_len); /* After
1038 gdb::unique_xmalloc_ptr<char> rewritten_filename;
1039 if (IS_ABSOLUTE_PATH (filename))
1041 /* If filename is absolute path, try the source path
1042 substitution on it. */
1043 rewritten_filename = rewrite_source_path (filename);
1045 if (rewritten_filename != NULL)
1046 filename = rewritten_filename.get ();
1049 result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, filename,
1050 OPEN_MODE, fullname);
1053 /* Didn't work. Try using just the basename. */
1054 p = lbasename (filename);
1056 result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, p,
1057 OPEN_MODE, fullname);
1063 /* Open a source file given a symtab S. Returns a file descriptor or
1064 negative number for error.
1066 This function is a convience function to find_and_open_source. */
1069 open_source_file (struct symtab *s)
1074 gdb::unique_xmalloc_ptr<char> fullname;
1075 int fd = find_and_open_source (s->filename, SYMTAB_DIRNAME (s), &fullname);
1076 s->fullname = fullname.release ();
1080 /* Finds the fullname that a symtab represents.
1082 This functions finds the fullname and saves it in s->fullname.
1083 It will also return the value.
1085 If this function fails to find the file that this symtab represents,
1086 the expected fullname is used. Therefore the files does not have to
1090 symtab_to_fullname (struct symtab *s)
1092 /* Use cached copy if we have it.
1093 We rely on forget_cached_source_info being called appropriately
1094 to handle cases like the file being moved. */
1095 if (s->fullname == NULL)
1097 int fd = open_source_file (s);
1103 gdb::unique_xmalloc_ptr<char> fullname;
1105 /* rewrite_source_path would be applied by find_and_open_source, we
1106 should report the pathname where GDB tried to find the file. */
1108 if (SYMTAB_DIRNAME (s) == NULL || IS_ABSOLUTE_PATH (s->filename))
1109 fullname.reset (xstrdup (s->filename));
1111 fullname.reset (concat (SYMTAB_DIRNAME (s), SLASH_STRING,
1112 s->filename, (char *) NULL));
1114 s->fullname = rewrite_source_path (fullname.get ()).release ();
1115 if (s->fullname == NULL)
1116 s->fullname = fullname.release ();
1123 /* See commentary in source.h. */
1126 symtab_to_filename_for_display (struct symtab *symtab)
1128 if (filename_display_string == filename_display_basename)
1129 return lbasename (symtab->filename);
1130 else if (filename_display_string == filename_display_absolute)
1131 return symtab_to_fullname (symtab);
1132 else if (filename_display_string == filename_display_relative)
1133 return symtab->filename;
1135 internal_error (__FILE__, __LINE__, _("invalid filename_display_string"));
1138 /* Create and initialize the table S->line_charpos that records
1139 the positions of the lines in the source file, which is assumed
1140 to be open on descriptor DESC.
1141 All set S->nlines to the number of such lines. */
1144 find_source_lines (struct symtab *s, int desc)
1149 int lines_allocated = 1000;
1155 line_charpos = XNEWVEC (int, lines_allocated);
1156 if (fstat (desc, &st) < 0)
1157 perror_with_name (symtab_to_filename_for_display (s));
1159 if (SYMTAB_OBJFILE (s) != NULL && SYMTAB_OBJFILE (s)->obfd != NULL)
1160 mtime = SYMTAB_OBJFILE (s)->mtime;
1162 mtime = exec_bfd_mtime;
1164 if (mtime && mtime < st.st_mtime)
1165 warning (_("Source file is more recent than executable."));
1168 /* st_size might be a large type, but we only support source files whose
1169 size fits in an int. */
1170 size = (int) st.st_size;
1172 /* Use the heap, not the stack, because this may be pretty large,
1173 and we may run into various kinds of limits on stack size. */
1174 gdb::def_vector<char> data (size);
1176 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1177 size = myread (desc, data.data (), size);
1179 perror_with_name (symtab_to_filename_for_display (s));
1180 end = data.data () + size;
1182 line_charpos[0] = 0;
1187 /* A newline at the end does not start a new line. */
1190 if (nlines == lines_allocated)
1192 lines_allocated *= 2;
1194 (int *) xrealloc ((char *) line_charpos,
1195 sizeof (int) * lines_allocated);
1197 line_charpos[nlines++] = p - data.data ();
1204 (int *) xrealloc ((char *) line_charpos, nlines * sizeof (int));
1210 /* Get full pathname and line number positions for a symtab.
1211 Return nonzero if line numbers may have changed.
1212 Set *FULLNAME to actual name of the file as found by `openp',
1213 or to 0 if the file is not found. */
1216 get_filename_and_charpos (struct symtab *s, char **fullname)
1218 int desc, linenums_changed = 0;
1219 struct cleanup *cleanups;
1221 desc = open_source_file (s);
1228 cleanups = make_cleanup_close (desc);
1230 *fullname = s->fullname;
1231 if (s->line_charpos == 0)
1232 linenums_changed = 1;
1233 if (linenums_changed)
1234 find_source_lines (s, desc);
1235 do_cleanups (cleanups);
1236 return linenums_changed;
1239 /* Print text describing the full name of the source file S
1240 and the line number LINE and its corresponding character position.
1241 The text starts with two Ctrl-z so that the Emacs-GDB interface
1244 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1246 Return 1 if successful, 0 if could not find the file. */
1249 identify_source_line (struct symtab *s, int line, int mid_statement,
1252 if (s->line_charpos == 0)
1253 get_filename_and_charpos (s, (char **) NULL);
1254 if (s->fullname == 0)
1256 if (line > s->nlines)
1257 /* Don't index off the end of the line_charpos array. */
1259 annotate_source (s->fullname, line, s->line_charpos[line - 1],
1260 mid_statement, get_objfile_arch (SYMTAB_OBJFILE (s)), pc);
1262 current_source_line = line;
1263 current_source_symtab = s;
1264 clear_lines_listed_range ();
1269 /* Print source lines from the file of symtab S,
1270 starting with line number LINE and stopping before line number STOPLINE. */
1273 print_source_lines_base (struct symtab *s, int line, int stopline,
1274 print_source_lines_flags flags)
1279 int nlines = stopline - line;
1280 struct ui_out *uiout = current_uiout;
1282 /* Regardless of whether we can open the file, set current_source_symtab. */
1283 current_source_symtab = s;
1284 current_source_line = line;
1285 first_line_listed = line;
1287 /* If printing of source lines is disabled, just print file and line
1289 if (uiout->test_flags (ui_source_list))
1291 /* Only prints "No such file or directory" once. */
1292 if ((s != last_source_visited) || (!last_source_error))
1294 last_source_visited = s;
1295 desc = open_source_file (s);
1299 desc = last_source_error;
1300 flags |= PRINT_SOURCE_LINES_NOERROR;
1305 desc = last_source_error;
1306 flags |= PRINT_SOURCE_LINES_NOERROR;
1310 if (desc < 0 || noprint)
1312 last_source_error = desc;
1314 if (!(flags & PRINT_SOURCE_LINES_NOERROR))
1316 const char *filename = symtab_to_filename_for_display (s);
1317 int len = strlen (filename) + 100;
1318 char *name = (char *) alloca (len);
1320 xsnprintf (name, len, "%d\t%s", line, filename);
1321 print_sys_errmsg (name, errno);
1325 uiout->field_int ("line", line);
1326 uiout->text ("\tin ");
1328 /* CLI expects only the "file" field. TUI expects only the
1329 "fullname" field (and TUI does break if "file" is printed).
1330 MI expects both fields. ui_source_list is set only for CLI,
1332 if (uiout->is_mi_like_p () || uiout->test_flags (ui_source_list))
1333 uiout->field_string ("file", symtab_to_filename_for_display (s));
1334 if (uiout->is_mi_like_p () || !uiout->test_flags (ui_source_list))
1336 const char *s_fullname = symtab_to_fullname (s);
1337 char *local_fullname;
1339 /* ui_out_field_string may free S_FULLNAME by calling
1340 open_source_file for it again. See e.g.,
1341 tui_field_string->tui_show_source. */
1342 local_fullname = (char *) alloca (strlen (s_fullname) + 1);
1343 strcpy (local_fullname, s_fullname);
1345 uiout->field_string ("fullname", local_fullname);
1354 last_source_error = 0;
1356 if (s->line_charpos == 0)
1357 find_source_lines (s, desc);
1359 if (line < 1 || line > s->nlines)
1362 error (_("Line number %d out of range; %s has %d lines."),
1363 line, symtab_to_filename_for_display (s), s->nlines);
1366 if (lseek (desc, s->line_charpos[line - 1], 0) < 0)
1369 perror_with_name (symtab_to_filename_for_display (s));
1372 gdb_file_up stream (fdopen (desc, FDOPEN_MODE));
1373 clearerr (stream.get ());
1375 while (nlines-- > 0)
1379 c = fgetc (stream.get ());
1382 last_line_listed = current_source_line;
1383 if (flags & PRINT_SOURCE_LINES_FILENAME)
1385 uiout->text (symtab_to_filename_for_display (s));
1388 xsnprintf (buf, sizeof (buf), "%d\t", current_source_line++);
1392 if (c < 040 && c != '\t' && c != '\n' && c != '\r')
1394 xsnprintf (buf, sizeof (buf), "^%c", c + 0100);
1401 /* Skip a \r character, but only before a \n. */
1402 int c1 = fgetc (stream.get ());
1405 printf_filtered ("^%c", c + 0100);
1407 ungetc (c1, stream.get ());
1411 xsnprintf (buf, sizeof (buf), "%c", c);
1415 while (c != '\n' && (c = fgetc (stream.get ())) >= 0);
1419 /* Show source lines from the file of symtab S, starting with line
1420 number LINE and stopping before line number STOPLINE. If this is
1421 not the command line version, then the source is shown in the source
1422 window otherwise it is simply printed. */
1425 print_source_lines (struct symtab *s, int line, int stopline,
1426 print_source_lines_flags flags)
1428 print_source_lines_base (s, line, stopline, flags);
1431 /* Print info on range of pc's in a specified line. */
1434 info_line_command (const char *arg, int from_tty)
1436 CORE_ADDR start_pc, end_pc;
1438 std::vector<symtab_and_line> decoded_sals;
1439 symtab_and_line curr_sal;
1440 gdb::array_view<symtab_and_line> sals;
1444 curr_sal.symtab = current_source_symtab;
1445 curr_sal.pspace = current_program_space;
1446 if (last_line_listed != 0)
1447 curr_sal.line = last_line_listed;
1449 curr_sal.line = current_source_line;
1455 decoded_sals = decode_line_with_last_displayed (arg,
1456 DECODE_LINE_LIST_MODE);
1457 sals = decoded_sals;
1462 /* C++ More than one line may have been specified, as when the user
1463 specifies an overloaded function name. Print info on them all. */
1464 for (const auto &sal : sals)
1466 if (sal.pspace != current_program_space)
1469 if (sal.symtab == 0)
1471 struct gdbarch *gdbarch = get_current_arch ();
1473 printf_filtered (_("No line number information available"));
1476 /* This is useful for "info line *0x7f34". If we can't tell the
1477 user about a source line, at least let them have the symbolic
1479 printf_filtered (" for address ");
1481 print_address (gdbarch, sal.pc, gdb_stdout);
1484 printf_filtered (".");
1485 printf_filtered ("\n");
1487 else if (sal.line > 0
1488 && find_line_pc_range (sal, &start_pc, &end_pc))
1490 struct gdbarch *gdbarch
1491 = get_objfile_arch (SYMTAB_OBJFILE (sal.symtab));
1493 if (start_pc == end_pc)
1495 printf_filtered ("Line %d of \"%s\"",
1497 symtab_to_filename_for_display (sal.symtab));
1499 printf_filtered (" is at address ");
1500 print_address (gdbarch, start_pc, gdb_stdout);
1502 printf_filtered (" but contains no code.\n");
1506 printf_filtered ("Line %d of \"%s\"",
1508 symtab_to_filename_for_display (sal.symtab));
1510 printf_filtered (" starts at address ");
1511 print_address (gdbarch, start_pc, gdb_stdout);
1513 printf_filtered (" and ends at ");
1514 print_address (gdbarch, end_pc, gdb_stdout);
1515 printf_filtered (".\n");
1518 /* x/i should display this line's code. */
1519 set_next_address (gdbarch, start_pc);
1521 /* Repeating "info line" should do the following line. */
1522 last_line_listed = sal.line + 1;
1524 /* If this is the only line, show the source code. If it could
1525 not find the file, don't do anything special. */
1526 if (annotation_level && sals.size () == 1)
1527 identify_source_line (sal.symtab, sal.line, 0, start_pc);
1530 /* Is there any case in which we get here, and have an address
1531 which the user would want to see? If we have debugging symbols
1532 and no line numbers? */
1533 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1534 sal.line, symtab_to_filename_for_display (sal.symtab));
1538 /* Commands to search the source file for a regexp. */
1541 forward_search_command (const char *regex, int from_tty)
1547 struct cleanup *cleanups;
1549 line = last_line_listed + 1;
1551 msg = (char *) re_comp (regex);
1553 error (("%s"), msg);
1555 if (current_source_symtab == 0)
1556 select_source_symtab (0);
1558 desc = open_source_file (current_source_symtab);
1560 perror_with_name (symtab_to_filename_for_display (current_source_symtab));
1561 cleanups = make_cleanup_close (desc);
1563 if (current_source_symtab->line_charpos == 0)
1564 find_source_lines (current_source_symtab, desc);
1566 if (line < 1 || line > current_source_symtab->nlines)
1567 error (_("Expression not found"));
1569 if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
1570 perror_with_name (symtab_to_filename_for_display (current_source_symtab));
1572 discard_cleanups (cleanups);
1573 gdb_file_up stream (fdopen (desc, FDOPEN_MODE));
1574 clearerr (stream.get ());
1577 static char *buf = NULL;
1579 int cursize, newsize;
1582 buf = (char *) xmalloc (cursize);
1585 c = fgetc (stream.get ());
1591 if (p - buf == cursize)
1593 newsize = cursize + cursize / 2;
1594 buf = (char *) xrealloc (buf, newsize);
1599 while (c != '\n' && (c = fgetc (stream.get ())) >= 0);
1601 /* Remove the \r, if any, at the end of the line, otherwise
1602 regular expressions that end with $ or \n won't work. */
1603 if (p - buf > 1 && p[-2] == '\r')
1609 /* We now have a source line in buf, null terminate and match. */
1611 if (re_exec (buf) > 0)
1614 print_source_lines (current_source_symtab, line, line + 1, 0);
1615 set_internalvar_integer (lookup_internalvar ("_"), line);
1616 current_source_line = std::max (line - lines_to_list / 2, 1);
1622 printf_filtered (_("Expression not found\n"));
1626 reverse_search_command (const char *regex, int from_tty)
1632 struct cleanup *cleanups;
1634 line = last_line_listed - 1;
1636 msg = (char *) re_comp (regex);
1638 error (("%s"), msg);
1640 if (current_source_symtab == 0)
1641 select_source_symtab (0);
1643 desc = open_source_file (current_source_symtab);
1645 perror_with_name (symtab_to_filename_for_display (current_source_symtab));
1646 cleanups = make_cleanup_close (desc);
1648 if (current_source_symtab->line_charpos == 0)
1649 find_source_lines (current_source_symtab, desc);
1651 if (line < 1 || line > current_source_symtab->nlines)
1652 error (_("Expression not found"));
1654 if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
1655 perror_with_name (symtab_to_filename_for_display (current_source_symtab));
1657 discard_cleanups (cleanups);
1658 gdb_file_up stream (fdopen (desc, FDOPEN_MODE));
1659 clearerr (stream.get ());
1662 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1663 char buf[4096]; /* Should be reasonable??? */
1666 c = fgetc (stream.get ());
1673 while (c != '\n' && (c = fgetc (stream.get ())) >= 0);
1675 /* Remove the \r, if any, at the end of the line, otherwise
1676 regular expressions that end with $ or \n won't work. */
1677 if (p - buf > 1 && p[-2] == '\r')
1683 /* We now have a source line in buf; null terminate and match. */
1685 if (re_exec (buf) > 0)
1688 print_source_lines (current_source_symtab, line, line + 1, 0);
1689 set_internalvar_integer (lookup_internalvar ("_"), line);
1690 current_source_line = std::max (line - lines_to_list / 2, 1);
1694 if (fseek (stream.get (),
1695 current_source_symtab->line_charpos[line - 1], 0) < 0)
1697 const char *filename;
1699 filename = symtab_to_filename_for_display (current_source_symtab);
1700 perror_with_name (filename);
1704 printf_filtered (_("Expression not found\n"));
1708 /* If the last character of PATH is a directory separator, then strip it. */
1711 strip_trailing_directory_separator (char *path)
1713 const int last = strlen (path) - 1;
1716 return; /* No stripping is needed if PATH is the empty string. */
1718 if (IS_DIR_SEPARATOR (path[last]))
1722 /* Return the path substitution rule that matches FROM.
1723 Return NULL if no rule matches. */
1725 static struct substitute_path_rule *
1726 find_substitute_path_rule (const char *from)
1728 struct substitute_path_rule *rule = substitute_path_rules;
1730 while (rule != NULL)
1732 if (FILENAME_CMP (rule->from, from) == 0)
1740 /* Add a new substitute-path rule at the end of the current list of rules.
1741 The new rule will replace FROM into TO. */
1744 add_substitute_path_rule (char *from, char *to)
1746 struct substitute_path_rule *rule;
1747 struct substitute_path_rule *new_rule = XNEW (struct substitute_path_rule);
1749 new_rule->from = xstrdup (from);
1750 new_rule->to = xstrdup (to);
1751 new_rule->next = NULL;
1753 /* If the list of rules are empty, then insert the new rule
1754 at the head of the list. */
1756 if (substitute_path_rules == NULL)
1758 substitute_path_rules = new_rule;
1762 /* Otherwise, skip to the last rule in our list and then append
1765 rule = substitute_path_rules;
1766 while (rule->next != NULL)
1769 rule->next = new_rule;
1772 /* Remove the given source path substitution rule from the current list
1773 of rules. The memory allocated for that rule is also deallocated. */
1776 delete_substitute_path_rule (struct substitute_path_rule *rule)
1778 if (rule == substitute_path_rules)
1779 substitute_path_rules = rule->next;
1782 struct substitute_path_rule *prev = substitute_path_rules;
1784 while (prev != NULL && prev->next != rule)
1787 gdb_assert (prev != NULL);
1789 prev->next = rule->next;
1797 /* Implement the "show substitute-path" command. */
1800 show_substitute_path_command (const char *args, int from_tty)
1802 struct substitute_path_rule *rule = substitute_path_rules;
1805 gdb_argv argv (args);
1807 /* We expect zero or one argument. */
1809 if (argv != NULL && argv[0] != NULL && argv[1] != NULL)
1810 error (_("Too many arguments in command"));
1812 if (argv != NULL && argv[0] != NULL)
1815 /* Print the substitution rules. */
1819 (_("Source path substitution rule matching `%s':\n"), from);
1821 printf_filtered (_("List of all source path substitution rules:\n"));
1823 while (rule != NULL)
1825 if (from == NULL || substitute_path_rule_matches (rule, from) != 0)
1826 printf_filtered (" `%s' -> `%s'.\n", rule->from, rule->to);
1831 /* Implement the "unset substitute-path" command. */
1834 unset_substitute_path_command (const char *args, int from_tty)
1836 struct substitute_path_rule *rule = substitute_path_rules;
1837 gdb_argv argv (args);
1841 /* This function takes either 0 or 1 argument. */
1843 if (argv != NULL && argv[0] != NULL && argv[1] != NULL)
1844 error (_("Incorrect usage, too many arguments in command"));
1846 if (argv != NULL && argv[0] != NULL)
1849 /* If the user asked for all the rules to be deleted, ask him
1850 to confirm and give him a chance to abort before the action
1854 && !query (_("Delete all source path substitution rules? ")))
1855 error (_("Canceled"));
1857 /* Delete the rule matching the argument. No argument means that
1858 all rules should be deleted. */
1860 while (rule != NULL)
1862 struct substitute_path_rule *next = rule->next;
1864 if (from == NULL || FILENAME_CMP (from, rule->from) == 0)
1866 delete_substitute_path_rule (rule);
1873 /* If the user asked for a specific rule to be deleted but
1874 we could not find it, then report an error. */
1876 if (from != NULL && !rule_found)
1877 error (_("No substitution rule defined for `%s'"), from);
1879 forget_cached_source_info ();
1882 /* Add a new source path substitution rule. */
1885 set_substitute_path_command (const char *args, int from_tty)
1887 struct substitute_path_rule *rule;
1889 gdb_argv argv (args);
1891 if (argv == NULL || argv[0] == NULL || argv [1] == NULL)
1892 error (_("Incorrect usage, too few arguments in command"));
1894 if (argv[2] != NULL)
1895 error (_("Incorrect usage, too many arguments in command"));
1897 if (*(argv[0]) == '\0')
1898 error (_("First argument must be at least one character long"));
1900 /* Strip any trailing directory separator character in either FROM
1901 or TO. The substitution rule already implicitly contains them. */
1902 strip_trailing_directory_separator (argv[0]);
1903 strip_trailing_directory_separator (argv[1]);
1905 /* If a rule with the same "from" was previously defined, then
1906 delete it. This new rule replaces it. */
1908 rule = find_substitute_path_rule (argv[0]);
1910 delete_substitute_path_rule (rule);
1912 /* Insert the new substitution rule. */
1914 add_substitute_path_rule (argv[0], argv[1]);
1915 forget_cached_source_info ();
1920 _initialize_source (void)
1922 struct cmd_list_element *c;
1924 current_source_symtab = 0;
1925 init_source_path ();
1927 /* The intention is to use POSIX Basic Regular Expressions.
1928 Always use the GNU regex routine for consistency across all hosts.
1929 Our current GNU regex.c does not have all the POSIX features, so this is
1930 just an approximation. */
1931 re_set_syntax (RE_SYNTAX_GREP);
1933 c = add_cmd ("directory", class_files, directory_command, _("\
1934 Add directory DIR to beginning of search path for source files.\n\
1935 Forget cached info on source file locations and line positions.\n\
1936 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1937 directory in which the source file was compiled into object code.\n\
1938 With no argument, reset the search path to $cdir:$cwd, the default."),
1942 add_com_alias ("use", "directory", class_files, 0);
1944 set_cmd_completer (c, filename_completer);
1946 add_setshow_optional_filename_cmd ("directories",
1950 Set the search path for finding source files."),
1952 Show the search path for finding source files."),
1954 $cwd in the path means the current working directory.\n\
1955 $cdir in the path means the compilation directory of the source file.\n\
1956 GDB ensures the search path always ends with $cdir:$cwd by\n\
1957 appending these directories if necessary.\n\
1958 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1959 set_directories_command,
1960 show_directories_command,
1961 &setlist, &showlist);
1963 add_info ("source", info_source_command,
1964 _("Information about the current source file."));
1966 add_info ("line", info_line_command, _("\
1967 Core addresses of the code for a source line.\n\
1968 Line can be specified as\n\
1969 LINENUM, to list around that line in current file,\n\
1970 FILE:LINENUM, to list around that line in that file,\n\
1971 FUNCTION, to list around beginning of that function,\n\
1972 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1973 Default is to describe the last source line that was listed.\n\n\
1974 This sets the default address for \"x\" to the line's first instruction\n\
1975 so that \"x/i\" suffices to start examining the machine code.\n\
1976 The address is also stored as the value of \"$_\"."));
1978 add_com ("forward-search", class_files, forward_search_command, _("\
1979 Search for regular expression (see regex(3)) from last line listed.\n\
1980 The matching line number is also stored as the value of \"$_\"."));
1981 add_com_alias ("search", "forward-search", class_files, 0);
1982 add_com_alias ("fo", "forward-search", class_files, 1);
1984 add_com ("reverse-search", class_files, reverse_search_command, _("\
1985 Search backward for regular expression (see regex(3)) from last line listed.\n\
1986 The matching line number is also stored as the value of \"$_\"."));
1987 add_com_alias ("rev", "reverse-search", class_files, 1);
1989 add_setshow_integer_cmd ("listsize", class_support, &lines_to_list, _("\
1990 Set number of source lines gdb will list by default."), _("\
1991 Show number of source lines gdb will list by default."), _("\
1992 Use this to choose how many source lines the \"list\" displays (unless\n\
1993 the \"list\" argument explicitly specifies some other number).\n\
1994 A value of \"unlimited\", or zero, means there's no limit."),
1997 &setlist, &showlist);
1999 add_cmd ("substitute-path", class_files, set_substitute_path_command,
2001 Usage: set substitute-path FROM TO\n\
2002 Add a substitution rule replacing FROM into TO in source file names.\n\
2003 If a substitution rule was previously set for FROM, the old rule\n\
2004 is replaced by the new one."),
2007 add_cmd ("substitute-path", class_files, unset_substitute_path_command,
2009 Usage: unset substitute-path [FROM]\n\
2010 Delete the rule for substituting FROM in source file names. If FROM\n\
2011 is not specified, all substituting rules are deleted.\n\
2012 If the debugger cannot find a rule for FROM, it will display a warning."),
2015 add_cmd ("substitute-path", class_files, show_substitute_path_command,
2017 Usage: show substitute-path [FROM]\n\
2018 Print the rule for substituting FROM in source file names. If FROM\n\
2019 is not specified, print all substitution rules."),
2022 add_setshow_enum_cmd ("filename-display", class_files,
2023 filename_display_kind_names,
2024 &filename_display_string, _("\
2025 Set how to display filenames."), _("\
2026 Show how to display filenames."), _("\
2027 filename-display can be:\n\
2028 basename - display only basename of a filename\n\
2029 relative - display a filename relative to the compilation directory\n\
2030 absolute - display an absolute filename\n\
2031 By default, relative filenames are displayed."),
2033 show_filename_display_string,
2034 &setlist, &showlist);