1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1986-2014 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>
35 #include "gdb_regex.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "completer.h"
44 #include "readline/readline.h"
46 #define OPEN_MODE (O_RDONLY | O_BINARY)
47 #define FDOPEN_MODE FOPEN_RB
49 /* Prototypes for exported functions. */
51 void _initialize_source (void);
53 /* Prototypes for local functions. */
55 static int get_filename_and_charpos (struct symtab *, char **);
57 static void reverse_search_command (char *, int);
59 static void forward_search_command (char *, int);
61 static void line_info (char *, int);
63 static void source_info (char *, int);
65 /* Path of directories to search for source files.
66 Same format as the PATH environment variable's value. */
70 /* Support for source path substitution commands. */
72 struct substitute_path_rule
76 struct substitute_path_rule *next;
79 static struct substitute_path_rule *substitute_path_rules = NULL;
81 /* Symtab of default file for listing lines of. */
83 static struct symtab *current_source_symtab;
85 /* Default next line to list. */
87 static int current_source_line;
89 static struct program_space *current_source_pspace;
91 /* Default number of lines to print with commands like "list".
92 This is based on guessing how many long (i.e. more than chars_per_line
93 characters) lines there will be. To be completely correct, "list"
94 and friends should be rewritten to count characters and see where
95 things are wrapping, but that would be a fair amount of work. */
97 int lines_to_list = 10;
99 show_lines_to_list (struct ui_file *file, int from_tty,
100 struct cmd_list_element *c, const char *value)
102 fprintf_filtered (file,
103 _("Number of source lines gdb "
104 "will list by default is %s.\n"),
108 /* Possible values of 'set filename-display'. */
109 static const char filename_display_basename[] = "basename";
110 static const char filename_display_relative[] = "relative";
111 static const char filename_display_absolute[] = "absolute";
113 static const char *const filename_display_kind_names[] = {
114 filename_display_basename,
115 filename_display_relative,
116 filename_display_absolute,
120 static const char *filename_display_string = filename_display_relative;
123 show_filename_display_string (struct ui_file *file, int from_tty,
124 struct cmd_list_element *c, const char *value)
126 fprintf_filtered (file, _("Filenames are displayed as \"%s\".\n"), value);
129 /* Line number of last line printed. Default for various commands.
130 current_source_line is usually, but not always, the same as this. */
132 static int last_line_listed;
134 /* First line number listed by last listing command. If 0, then no
135 source lines have yet been listed since the last time the current
136 source line was changed. */
138 static int first_line_listed;
140 /* Saves the name of the last source file visited and a possible error code.
141 Used to prevent repeating annoying "No such file or directories" msgs. */
143 static struct symtab *last_source_visited = NULL;
144 static int last_source_error = 0;
146 /* Return the first line listed by print_source_lines.
147 Used by command interpreters to request listing from
151 get_first_line_listed (void)
153 return first_line_listed;
156 /* Clear line listed range. This makes the next "list" center the
157 printed source lines around the current source line. */
160 clear_lines_listed_range (void)
162 first_line_listed = 0;
163 last_line_listed = 0;
166 /* Return the default number of lines to print with commands like the
167 cli "list". The caller of print_source_lines must use this to
168 calculate the end line and use it in the call to print_source_lines
169 as it does not automatically use this value. */
172 get_lines_to_list (void)
174 return lines_to_list;
177 /* Return the current source file for listing and next line to list.
178 NOTE: The returned sal pc and end fields are not valid. */
180 struct symtab_and_line
181 get_current_source_symtab_and_line (void)
183 struct symtab_and_line cursal = { 0 };
185 cursal.pspace = current_source_pspace;
186 cursal.symtab = current_source_symtab;
187 cursal.line = current_source_line;
194 /* If the current source file for listing is not set, try and get a default.
195 Usually called before get_current_source_symtab_and_line() is called.
196 It may err out if a default cannot be determined.
197 We must be cautious about where it is called, as it can recurse as the
198 process of determining a new default may call the caller!
199 Use get_current_source_symtab_and_line only to get whatever
200 we have without erroring out or trying to get a default. */
203 set_default_source_symtab_and_line (void)
205 if (!have_full_symbols () && !have_partial_symbols ())
206 error (_("No symbol table is loaded. Use the \"file\" command."));
208 /* Pull in a current source symtab if necessary. */
209 if (current_source_symtab == 0)
210 select_source_symtab (0);
213 /* Return the current default file for listing and next line to list
214 (the returned sal pc and end fields are not valid.)
215 and set the current default to whatever is in SAL.
216 NOTE: The returned sal pc and end fields are not valid. */
218 struct symtab_and_line
219 set_current_source_symtab_and_line (const struct symtab_and_line *sal)
221 struct symtab_and_line cursal = { 0 };
223 cursal.pspace = current_source_pspace;
224 cursal.symtab = current_source_symtab;
225 cursal.line = current_source_line;
229 current_source_pspace = sal->pspace;
230 current_source_symtab = sal->symtab;
231 current_source_line = sal->line;
233 /* Force the next "list" to center around the current line. */
234 clear_lines_listed_range ();
239 /* Reset any information stored about a default file and line to print. */
242 clear_current_source_symtab_and_line (void)
244 current_source_symtab = 0;
245 current_source_line = 0;
248 /* Set the source file default for the "list" command to be S.
250 If S is NULL, and we don't have a default, find one. This
251 should only be called when the user actually tries to use the
252 default, since we produce an error if we can't find a reasonable
253 default. Also, since this can cause symbols to be read, doing it
254 before we need to would make things slower than necessary. */
257 select_source_symtab (struct symtab *s)
259 struct symtabs_and_lines sals;
260 struct symtab_and_line sal;
265 current_source_symtab = s;
266 current_source_line = 1;
267 current_source_pspace = SYMTAB_PSPACE (s);
271 if (current_source_symtab)
274 /* Make the default place to list be the function `main'
276 if (lookup_symbol (main_name (), 0, VAR_DOMAIN, 0))
278 sals = decode_line_with_current_source (main_name (),
279 DECODE_LINE_FUNFIRSTLINE);
282 current_source_pspace = sal.pspace;
283 current_source_symtab = sal.symtab;
284 current_source_line = max (sal.line - (lines_to_list - 1), 1);
285 if (current_source_symtab)
289 /* Alright; find the last file in the symtab list (ignoring .h's
290 and namespace symtabs). */
292 current_source_line = 1;
296 for (s = ofp->symtabs; s; s = s->next)
298 const char *name = s->filename;
299 int len = strlen (name);
301 if (!(len > 2 && (strcmp (&name[len - 2], ".h") == 0
302 || strcmp (name, "<<C++-namespaces>>") == 0)))
304 current_source_pspace = current_program_space;
305 current_source_symtab = s;
310 if (current_source_symtab)
316 s = ofp->sf->qf->find_last_source_symtab (ofp);
318 current_source_symtab = s;
320 if (current_source_symtab)
323 error (_("Can't find a default source file"));
326 /* Handler for "set directories path-list" command.
327 "set dir mumble" doesn't prepend paths, it resets the entire
328 path list. The theory is that set(show(dir)) should be a no-op. */
331 set_directories_command (char *args, int from_tty, struct cmd_list_element *c)
333 /* This is the value that was set.
334 It needs to be processed to maintain $cdir:$cwd and remove dups. */
335 char *set_path = source_path;
337 /* We preserve the invariant that $cdir:$cwd begins life at the end of
338 the list by calling init_source_path. If they appear earlier in
339 SET_PATH then mod_path will move them appropriately.
340 mod_path will also remove duplicates. */
342 if (*set_path != '\0')
343 mod_path (set_path, &source_path);
348 /* Print the list of source directories.
349 This is used by the "ld" command, so it has the signature of a command
353 show_directories_1 (char *ignore, int from_tty)
355 puts_filtered ("Source directories searched: ");
356 puts_filtered (source_path);
357 puts_filtered ("\n");
360 /* Handler for "show directories" command. */
363 show_directories_command (struct ui_file *file, int from_tty,
364 struct cmd_list_element *c, const char *value)
366 show_directories_1 (NULL, from_tty);
369 /* Forget line positions and file names for the symtabs in a
370 particular objfile. */
373 forget_cached_source_info_for_objfile (struct objfile *objfile)
377 ALL_OBJFILE_SYMTABS (objfile, s)
379 if (s->line_charpos != NULL)
381 xfree (s->line_charpos);
382 s->line_charpos = NULL;
384 if (s->fullname != NULL)
392 objfile->sf->qf->forget_cached_source_info (objfile);
395 /* Forget what we learned about line positions in source files, and
396 which directories contain them; must check again now since files
397 may be found in a different directory now. */
400 forget_cached_source_info (void)
402 struct program_space *pspace;
403 struct objfile *objfile;
406 ALL_PSPACE_OBJFILES (pspace, objfile)
408 forget_cached_source_info_for_objfile (objfile);
411 last_source_visited = NULL;
415 init_source_path (void)
419 xsnprintf (buf, sizeof (buf), "$cdir%c$cwd", DIRNAME_SEPARATOR);
420 source_path = xstrdup (buf);
421 forget_cached_source_info ();
424 /* Add zero or more directories to the front of the source path. */
427 directory_command (char *dirname, int from_tty)
430 /* FIXME, this goes to "delete dir"... */
433 if (!from_tty || query (_("Reinitialize source path to empty? ")))
441 mod_path (dirname, &source_path);
442 forget_cached_source_info ();
445 show_directories_1 ((char *) 0, from_tty);
448 /* Add a path given with the -d command line switch.
449 This will not be quoted so we must not treat spaces as separators. */
452 directory_switch (char *dirname, int from_tty)
454 add_path (dirname, &source_path, 0);
457 /* Add zero or more directories to the front of an arbitrary path. */
460 mod_path (char *dirname, char **which_path)
462 add_path (dirname, which_path, 1);
465 /* Workhorse of mod_path. Takes an extra argument to determine
466 if dirname should be parsed for separators that indicate multiple
467 directories. This allows for interfaces that pre-parse the dirname
468 and allow specification of traditional separator characters such
472 add_path (char *dirname, char **which_path, int parse_separators)
474 char *old = *which_path;
476 VEC (char_ptr) *dir_vec = NULL;
477 struct cleanup *back_to;
484 if (parse_separators)
486 char **argv, **argvp;
488 /* This will properly parse the space and tab separators
489 and any quotes that may exist. */
490 argv = gdb_buildargv (dirname);
492 for (argvp = argv; *argvp; argvp++)
493 dirnames_to_char_ptr_vec_append (&dir_vec, *argvp);
498 VEC_safe_push (char_ptr, dir_vec, xstrdup (dirname));
499 back_to = make_cleanup_free_char_ptr_vec (dir_vec);
501 for (ix = 0; VEC_iterate (char_ptr, dir_vec, ix, name); ++ix)
506 /* Spaces and tabs will have been removed by buildargv().
507 NAME is the start of the directory.
508 P is the '\0' following the end. */
509 p = name + strlen (name);
511 while (!(IS_DIR_SEPARATOR (*name) && p <= name + 1) /* "/" */
512 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
513 /* On MS-DOS and MS-Windows, h:\ is different from h: */
514 && !(p == name + 3 && name[1] == ':') /* "d:/" */
516 && IS_DIR_SEPARATOR (p[-1]))
517 /* Sigh. "foo/" => "foo" */
521 while (p > name && p[-1] == '.')
525 /* "." => getwd (). */
526 name = current_directory;
529 else if (p > name + 1 && IS_DIR_SEPARATOR (p[-2]))
539 /* "...foo/." => "...foo". */
550 name = tilde_expand (name);
551 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
552 else if (IS_ABSOLUTE_PATH (name) && p == name + 2) /* "d:" => "d:." */
553 name = concat (name, ".", (char *)NULL);
555 else if (!IS_ABSOLUTE_PATH (name) && name[0] != '$')
556 name = concat (current_directory, SLASH_STRING, name, (char *)NULL);
558 name = savestring (name, p - name);
559 make_cleanup (xfree, name);
561 /* Unless it's a variable, check existence. */
564 /* These are warnings, not errors, since we don't want a
565 non-existent directory in a .gdbinit file to stop processing
566 of the .gdbinit file.
568 Whether they get added to the path is more debatable. Current
569 answer is yes, in case the user wants to go make the directory
570 or whatever. If the directory continues to not exist/not be
571 a directory/etc, then having them in the path should be
573 if (stat (name, &st) < 0)
575 int save_errno = errno;
577 fprintf_unfiltered (gdb_stderr, "Warning: ");
578 print_sys_errmsg (name, save_errno);
580 else if ((st.st_mode & S_IFMT) != S_IFDIR)
581 warning (_("%s is not a directory."), name);
586 unsigned int len = strlen (name);
592 /* FIXME: we should use realpath() or its work-alike
593 before comparing. Then all the code above which
594 removes excess slashes and dots could simply go away. */
595 if (!filename_ncmp (p, name, len)
596 && (p[len] == '\0' || p[len] == DIRNAME_SEPARATOR))
598 /* Found it in the search path, remove old copy. */
601 /* Back over leading separator. */
604 if (prefix > p - *which_path)
606 /* Same dir twice in one cmd. */
609 /* Copy from next '\0' or ':'. */
610 memmove (p, &p[len + 1], strlen (&p[len + 1]) + 1);
612 p = strchr (p, DIRNAME_SEPARATOR);
619 tinybuf[0] = DIRNAME_SEPARATOR;
622 /* If we have already tacked on a name(s) in this command,
623 be sure they stay on the front as we tack on some
631 temp = concat (old, tinybuf, name, (char *)NULL);
633 *which_path = concat (temp, "", &old[prefix], (char *) NULL);
634 prefix = strlen (temp);
639 *which_path = concat (name, (old[0] ? tinybuf : old),
641 prefix = strlen (name);
650 do_cleanups (back_to);
655 source_info (char *ignore, int from_tty)
657 struct symtab *s = current_source_symtab;
661 printf_filtered (_("No current source file.\n"));
664 printf_filtered (_("Current source file is %s\n"), s->filename);
666 printf_filtered (_("Compilation directory is %s\n"), s->dirname);
668 printf_filtered (_("Located in %s\n"), s->fullname);
670 printf_filtered (_("Contains %d line%s.\n"), s->nlines,
671 s->nlines == 1 ? "" : "s");
673 printf_filtered (_("Source language is %s.\n"), language_str (s->language));
674 printf_filtered (_("Compiled with %s debugging format.\n"), s->debugformat);
675 printf_filtered (_("%s preprocessor macro info.\n"),
676 s->macro_table ? "Includes" : "Does not include");
680 /* Return True if the file NAME exists and is a regular file. */
682 is_regular_file (const char *name)
685 const int status = stat (name, &st);
687 /* Stat should never fail except when the file does not exist.
688 If stat fails, analyze the source of error and return True
689 unless the file does not exist, to avoid returning false results
690 on obscure systems where stat does not work as expected. */
693 return (errno != ENOENT);
695 return S_ISREG (st.st_mode);
698 /* Open a file named STRING, searching path PATH (dir names sep by some char)
699 using mode MODE in the calls to open. You cannot use this function to
700 create files (O_CREAT).
702 OPTS specifies the function behaviour in specific cases.
704 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
705 (ie pretend the first element of PATH is "."). This also indicates
706 that, unless OPF_SEARCH_IN_PATH is also specified, a slash in STRING
707 disables searching of the path (this is so that "exec-file ./foo" or
708 "symbol-file ./foo" insures that you get that particular version of
709 foo or an error message).
711 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
712 searched in path (we usually want this for source files but not for
715 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
716 the actual file opened (this string will always start with a "/"). We
717 have to take special pains to avoid doubling the "/" between the directory
718 and the file, sigh! Emacs gets confuzzed by this when we print the
721 If OPTS has OPF_RETURN_REALPATH set return FILENAME_OPENED resolved by
722 gdb_realpath. Even without OPF_RETURN_REALPATH this function still returns
723 filename starting with "/". If FILENAME_OPENED is NULL this option has no
726 If a file is found, return the descriptor.
727 Otherwise, return -1, with errno set for the last name we tried to open. */
729 /* >>>> This should only allow files of certain types,
730 >>>> eg executable, non-directory. */
732 openp (const char *path, int opts, const char *string,
733 int mode, char **filename_opened)
738 VEC (char_ptr) *dir_vec;
739 struct cleanup *back_to;
743 /* The open syscall MODE parameter is not specified. */
744 gdb_assert ((mode & O_CREAT) == 0);
745 gdb_assert (string != NULL);
747 /* A file with an empty name cannot possibly exist. Report a failure
748 without further checking.
750 This is an optimization which also defends us against buggy
751 implementations of the "stat" function. For instance, we have
752 noticed that a MinGW debugger built on Windows XP 32bits crashes
753 when the debugger is started with an empty argument. */
754 if (string[0] == '\0')
765 if ((opts & OPF_TRY_CWD_FIRST) || IS_ABSOLUTE_PATH (string))
769 if (is_regular_file (string))
771 filename = alloca (strlen (string) + 1);
772 strcpy (filename, string);
773 fd = gdb_open_cloexec (filename, mode, 0);
783 if (!(opts & OPF_SEARCH_IN_PATH))
784 for (i = 0; string[i]; i++)
785 if (IS_DIR_SEPARATOR (string[i]))
789 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
790 if (HAS_DRIVE_SPEC (string))
791 string = STRIP_DRIVE_SPEC (string);
793 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
794 while (IS_DIR_SEPARATOR(string[0]))
798 while (string[0] == '.' && IS_DIR_SEPARATOR (string[1]))
801 alloclen = strlen (path) + strlen (string) + 2;
802 filename = alloca (alloclen);
805 dir_vec = dirnames_to_char_ptr_vec (path);
806 back_to = make_cleanup_free_char_ptr_vec (dir_vec);
808 for (ix = 0; VEC_iterate (char_ptr, dir_vec, ix, dir); ++ix)
810 size_t len = strlen (dir);
812 if (strcmp (dir, "$cwd") == 0)
814 /* Name is $cwd -- insert current directory name instead. */
817 /* First, realloc the filename buffer if too short. */
818 len = strlen (current_directory);
819 newlen = len + strlen (string) + 2;
820 if (newlen > alloclen)
823 filename = alloca (alloclen);
825 strcpy (filename, current_directory);
827 else if (strchr(dir, '~'))
829 /* See whether we need to expand the tilde. */
831 char *tilde_expanded;
833 tilde_expanded = tilde_expand (dir);
835 /* First, realloc the filename buffer if too short. */
836 len = strlen (tilde_expanded);
837 newlen = len + strlen (string) + 2;
838 if (newlen > alloclen)
841 filename = alloca (alloclen);
843 strcpy (filename, tilde_expanded);
844 xfree (tilde_expanded);
848 /* Normal file name in path -- just use it. */
849 strcpy (filename, dir);
851 /* Don't search $cdir. It's also a magic path like $cwd, but we
852 don't have enough information to expand it. The user *could*
853 have an actual directory named '$cdir' but handling that would
854 be confusing, it would mean different things in different
855 contexts. If the user really has '$cdir' one can use './$cdir'.
856 We can get $cdir when loading scripts. When loading source files
857 $cdir must have already been expanded to the correct value. */
858 if (strcmp (dir, "$cdir") == 0)
862 /* Remove trailing slashes. */
863 while (len > 0 && IS_DIR_SEPARATOR (filename[len - 1]))
866 strcat (filename + len, SLASH_STRING);
867 strcat (filename, string);
869 if (is_regular_file (filename))
871 fd = gdb_open_cloexec (filename, mode, 0);
877 do_cleanups (back_to);
882 /* If a file was opened, canonicalize its filename. */
884 *filename_opened = NULL;
885 else if ((opts & OPF_RETURN_REALPATH) != 0)
886 *filename_opened = gdb_realpath (filename);
888 *filename_opened = gdb_abspath (filename);
895 /* This is essentially a convenience, for clients that want the behaviour
896 of openp, using source_path, but that really don't want the file to be
897 opened but want instead just to know what the full pathname is (as
898 qualified against source_path).
900 The current working directory is searched first.
902 If the file was found, this function returns 1, and FULL_PATHNAME is
903 set to the fully-qualified pathname.
905 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
907 source_full_path_of (const char *filename, char **full_pathname)
911 fd = openp (source_path,
912 OPF_TRY_CWD_FIRST | OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH,
913 filename, O_RDONLY, full_pathname);
916 *full_pathname = NULL;
924 /* Return non-zero if RULE matches PATH, that is if the rule can be
928 substitute_path_rule_matches (const struct substitute_path_rule *rule,
931 const int from_len = strlen (rule->from);
932 const int path_len = strlen (path);
934 if (path_len < from_len)
937 /* The substitution rules are anchored at the start of the path,
938 so the path should start with rule->from. */
940 if (filename_ncmp (path, rule->from, from_len) != 0)
943 /* Make sure that the region in the path that matches the substitution
944 rule is immediately followed by a directory separator (or the end of
945 string character). */
947 if (path[from_len] != '\0' && !IS_DIR_SEPARATOR (path[from_len]))
953 /* Find the substitute-path rule that applies to PATH and return it.
954 Return NULL if no rule applies. */
956 static struct substitute_path_rule *
957 get_substitute_path_rule (const char *path)
959 struct substitute_path_rule *rule = substitute_path_rules;
961 while (rule != NULL && !substitute_path_rule_matches (rule, path))
967 /* If the user specified a source path substitution rule that applies
968 to PATH, then apply it and return the new path. This new path must
969 be deallocated afterwards.
971 Return NULL if no substitution rule was specified by the user,
972 or if no rule applied to the given PATH. */
975 rewrite_source_path (const char *path)
977 const struct substitute_path_rule *rule = get_substitute_path_rule (path);
984 from_len = strlen (rule->from);
986 /* Compute the rewritten path and return it. */
989 (char *) xmalloc (strlen (path) + 1 + strlen (rule->to) - from_len);
990 strcpy (new_path, rule->to);
991 strcat (new_path, path + from_len);
997 find_and_open_source (const char *filename,
1001 char *path = source_path;
1004 struct cleanup *cleanup;
1006 /* Quick way out if we already know its full name. */
1010 /* The user may have requested that source paths be rewritten
1011 according to substitution rules he provided. If a substitution
1012 rule applies to this path, then apply it. */
1013 char *rewritten_fullname = rewrite_source_path (*fullname);
1015 if (rewritten_fullname != NULL)
1018 *fullname = rewritten_fullname;
1021 result = gdb_open_cloexec (*fullname, OPEN_MODE, 0);
1024 char *lpath = gdb_realpath (*fullname);
1031 /* Didn't work -- free old one, try again. */
1036 cleanup = make_cleanup (null_cleanup, NULL);
1038 if (dirname != NULL)
1040 /* If necessary, rewrite the compilation directory name according
1041 to the source path substitution rules specified by the user. */
1043 char *rewritten_dirname = rewrite_source_path (dirname);
1045 if (rewritten_dirname != NULL)
1047 make_cleanup (xfree, rewritten_dirname);
1048 dirname = rewritten_dirname;
1051 /* Replace a path entry of $cdir with the compilation directory
1054 /* We cast strstr's result in case an ANSIhole has made it const,
1055 which produces a "required warning" when assigned to a nonconst. */
1056 p = (char *) strstr (source_path, "$cdir");
1057 if (p && (p == path || p[-1] == DIRNAME_SEPARATOR)
1058 && (p[cdir_len] == DIRNAME_SEPARATOR || p[cdir_len] == '\0'))
1063 alloca (strlen (source_path) + 1 + strlen (dirname) + 1);
1064 len = p - source_path;
1065 strncpy (path, source_path, len); /* Before $cdir */
1066 strcpy (path + len, dirname); /* new stuff */
1067 strcat (path + len, source_path + len + cdir_len); /* After
1072 if (IS_ABSOLUTE_PATH (filename))
1074 /* If filename is absolute path, try the source path
1075 substitution on it. */
1076 char *rewritten_filename = rewrite_source_path (filename);
1078 if (rewritten_filename != NULL)
1080 make_cleanup (xfree, rewritten_filename);
1081 filename = rewritten_filename;
1085 result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, filename,
1086 OPEN_MODE, fullname);
1089 /* Didn't work. Try using just the basename. */
1090 p = lbasename (filename);
1092 result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, p,
1093 OPEN_MODE, fullname);
1096 do_cleanups (cleanup);
1100 /* Open a source file given a symtab S. Returns a file descriptor or
1101 negative number for error.
1103 This function is a convience function to find_and_open_source. */
1106 open_source_file (struct symtab *s)
1111 return find_and_open_source (s->filename, s->dirname, &s->fullname);
1114 /* Finds the fullname that a symtab represents.
1116 This functions finds the fullname and saves it in s->fullname.
1117 It will also return the value.
1119 If this function fails to find the file that this symtab represents,
1120 the expected fullname is used. Therefore the files does not have to
1124 symtab_to_fullname (struct symtab *s)
1126 /* Use cached copy if we have it.
1127 We rely on forget_cached_source_info being called appropriately
1128 to handle cases like the file being moved. */
1129 if (s->fullname == NULL)
1131 int fd = find_and_open_source (s->filename, s->dirname, &s->fullname);
1138 struct cleanup *back_to;
1140 /* rewrite_source_path would be applied by find_and_open_source, we
1141 should report the pathname where GDB tried to find the file. */
1143 if (s->dirname == NULL || IS_ABSOLUTE_PATH (s->filename))
1144 fullname = xstrdup (s->filename);
1146 fullname = concat (s->dirname, SLASH_STRING, s->filename, NULL);
1148 back_to = make_cleanup (xfree, fullname);
1149 s->fullname = rewrite_source_path (fullname);
1150 if (s->fullname == NULL)
1151 s->fullname = xstrdup (fullname);
1152 do_cleanups (back_to);
1159 /* See commentary in source.h. */
1162 symtab_to_filename_for_display (struct symtab *symtab)
1164 if (filename_display_string == filename_display_basename)
1165 return lbasename (symtab->filename);
1166 else if (filename_display_string == filename_display_absolute)
1167 return symtab_to_fullname (symtab);
1168 else if (filename_display_string == filename_display_relative)
1169 return symtab->filename;
1171 internal_error (__FILE__, __LINE__, _("invalid filename_display_string"));
1174 /* Create and initialize the table S->line_charpos that records
1175 the positions of the lines in the source file, which is assumed
1176 to be open on descriptor DESC.
1177 All set S->nlines to the number of such lines. */
1180 find_source_lines (struct symtab *s, int desc)
1183 char *data, *p, *end;
1185 int lines_allocated = 1000;
1191 line_charpos = (int *) xmalloc (lines_allocated * sizeof (int));
1192 if (fstat (desc, &st) < 0)
1193 perror_with_name (symtab_to_filename_for_display (s));
1195 if (s->objfile && s->objfile->obfd)
1196 mtime = s->objfile->mtime;
1198 mtime = exec_bfd_mtime;
1200 if (mtime && mtime < st.st_mtime)
1201 warning (_("Source file is more recent than executable."));
1204 struct cleanup *old_cleanups;
1206 /* st_size might be a large type, but we only support source files whose
1207 size fits in an int. */
1208 size = (int) st.st_size;
1210 /* Use malloc, not alloca, because this may be pretty large, and we may
1211 run into various kinds of limits on stack size. */
1212 data = (char *) xmalloc (size);
1213 old_cleanups = make_cleanup (xfree, data);
1215 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1216 size = myread (desc, data, size);
1218 perror_with_name (symtab_to_filename_for_display (s));
1221 line_charpos[0] = 0;
1226 /* A newline at the end does not start a new line. */
1229 if (nlines == lines_allocated)
1231 lines_allocated *= 2;
1233 (int *) xrealloc ((char *) line_charpos,
1234 sizeof (int) * lines_allocated);
1236 line_charpos[nlines++] = p - data;
1239 do_cleanups (old_cleanups);
1244 (int *) xrealloc ((char *) line_charpos, nlines * sizeof (int));
1250 /* Get full pathname and line number positions for a symtab.
1251 Return nonzero if line numbers may have changed.
1252 Set *FULLNAME to actual name of the file as found by `openp',
1253 or to 0 if the file is not found. */
1256 get_filename_and_charpos (struct symtab *s, char **fullname)
1258 int desc, linenums_changed = 0;
1259 struct cleanup *cleanups;
1261 desc = open_source_file (s);
1268 cleanups = make_cleanup_close (desc);
1270 *fullname = s->fullname;
1271 if (s->line_charpos == 0)
1272 linenums_changed = 1;
1273 if (linenums_changed)
1274 find_source_lines (s, desc);
1275 do_cleanups (cleanups);
1276 return linenums_changed;
1279 /* Print text describing the full name of the source file S
1280 and the line number LINE and its corresponding character position.
1281 The text starts with two Ctrl-z so that the Emacs-GDB interface
1284 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1286 Return 1 if successful, 0 if could not find the file. */
1289 identify_source_line (struct symtab *s, int line, int mid_statement,
1292 if (s->line_charpos == 0)
1293 get_filename_and_charpos (s, (char **) NULL);
1294 if (s->fullname == 0)
1296 if (line > s->nlines)
1297 /* Don't index off the end of the line_charpos array. */
1299 annotate_source (s->fullname, line, s->line_charpos[line - 1],
1300 mid_statement, get_objfile_arch (s->objfile), pc);
1302 current_source_line = line;
1303 current_source_symtab = s;
1304 clear_lines_listed_range ();
1309 /* Print source lines from the file of symtab S,
1310 starting with line number LINE and stopping before line number STOPLINE. */
1313 print_source_lines_base (struct symtab *s, int line, int stopline,
1314 enum print_source_lines_flags flags)
1320 int nlines = stopline - line;
1321 struct cleanup *cleanup;
1322 struct ui_out *uiout = current_uiout;
1324 /* Regardless of whether we can open the file, set current_source_symtab. */
1325 current_source_symtab = s;
1326 current_source_line = line;
1327 first_line_listed = line;
1329 /* If printing of source lines is disabled, just print file and line
1331 if (ui_out_test_flags (uiout, ui_source_list))
1333 /* Only prints "No such file or directory" once. */
1334 if ((s != last_source_visited) || (!last_source_error))
1336 last_source_visited = s;
1337 desc = open_source_file (s);
1341 desc = last_source_error;
1342 flags |= PRINT_SOURCE_LINES_NOERROR;
1347 desc = last_source_error;
1348 flags |= PRINT_SOURCE_LINES_NOERROR;
1352 if (desc < 0 || noprint)
1354 last_source_error = desc;
1356 if (!(flags & PRINT_SOURCE_LINES_NOERROR))
1358 const char *filename = symtab_to_filename_for_display (s);
1359 int len = strlen (filename) + 100;
1360 char *name = alloca (len);
1362 xsnprintf (name, len, "%d\t%s", line, filename);
1363 print_sys_errmsg (name, errno);
1367 ui_out_field_int (uiout, "line", line);
1368 ui_out_text (uiout, "\tin ");
1370 /* CLI expects only the "file" field. TUI expects only the
1371 "fullname" field (and TUI does break if "file" is printed).
1372 MI expects both fields. ui_source_list is set only for CLI,
1374 if (ui_out_is_mi_like_p (uiout)
1375 || ui_out_test_flags (uiout, ui_source_list))
1376 ui_out_field_string (uiout, "file",
1377 symtab_to_filename_for_display (s));
1378 if (ui_out_is_mi_like_p (uiout)
1379 || !ui_out_test_flags (uiout, ui_source_list))
1381 const char *s_fullname = symtab_to_fullname (s);
1382 char *local_fullname;
1384 /* ui_out_field_string may free S_FULLNAME by calling
1385 open_source_file for it again. See e.g.,
1386 tui_field_string->tui_show_source. */
1387 local_fullname = alloca (strlen (s_fullname) + 1);
1388 strcpy (local_fullname, s_fullname);
1390 ui_out_field_string (uiout, "fullname", local_fullname);
1393 ui_out_text (uiout, "\n");
1399 last_source_error = 0;
1401 if (s->line_charpos == 0)
1402 find_source_lines (s, desc);
1404 if (line < 1 || line > s->nlines)
1407 error (_("Line number %d out of range; %s has %d lines."),
1408 line, symtab_to_filename_for_display (s), s->nlines);
1411 if (lseek (desc, s->line_charpos[line - 1], 0) < 0)
1414 perror_with_name (symtab_to_filename_for_display (s));
1417 stream = fdopen (desc, FDOPEN_MODE);
1419 cleanup = make_cleanup_fclose (stream);
1421 while (nlines-- > 0)
1428 last_line_listed = current_source_line;
1429 if (flags & PRINT_SOURCE_LINES_FILENAME)
1431 ui_out_text (uiout, symtab_to_filename_for_display (s));
1432 ui_out_text (uiout, ":");
1434 xsnprintf (buf, sizeof (buf), "%d\t", current_source_line++);
1435 ui_out_text (uiout, buf);
1438 if (c < 040 && c != '\t' && c != '\n' && c != '\r')
1440 xsnprintf (buf, sizeof (buf), "^%c", c + 0100);
1441 ui_out_text (uiout, buf);
1444 ui_out_text (uiout, "^?");
1447 /* Skip a \r character, but only before a \n. */
1448 int c1 = fgetc (stream);
1451 printf_filtered ("^%c", c + 0100);
1453 ungetc (c1, stream);
1457 xsnprintf (buf, sizeof (buf), "%c", c);
1458 ui_out_text (uiout, buf);
1461 while (c != '\n' && (c = fgetc (stream)) >= 0);
1464 do_cleanups (cleanup);
1467 /* Show source lines from the file of symtab S, starting with line
1468 number LINE and stopping before line number STOPLINE. If this is
1469 not the command line version, then the source is shown in the source
1470 window otherwise it is simply printed. */
1473 print_source_lines (struct symtab *s, int line, int stopline,
1474 enum print_source_lines_flags flags)
1476 print_source_lines_base (s, line, stopline, flags);
1479 /* Print info on range of pc's in a specified line. */
1482 line_info (char *arg, int from_tty)
1484 struct symtabs_and_lines sals;
1485 struct symtab_and_line sal;
1486 CORE_ADDR start_pc, end_pc;
1488 struct cleanup *cleanups;
1490 init_sal (&sal); /* initialize to zeroes */
1494 sal.symtab = current_source_symtab;
1495 sal.pspace = current_program_space;
1496 if (last_line_listed != 0)
1497 sal.line = last_line_listed;
1499 sal.line = current_source_line;
1502 sals.sals = (struct symtab_and_line *)
1503 xmalloc (sizeof (struct symtab_and_line));
1508 sals = decode_line_with_last_displayed (arg, DECODE_LINE_LIST_MODE);
1513 cleanups = make_cleanup (xfree, sals.sals);
1515 /* C++ More than one line may have been specified, as when the user
1516 specifies an overloaded function name. Print info on them all. */
1517 for (i = 0; i < sals.nelts; i++)
1520 if (sal.pspace != current_program_space)
1523 if (sal.symtab == 0)
1525 struct gdbarch *gdbarch = get_current_arch ();
1527 printf_filtered (_("No line number information available"));
1530 /* This is useful for "info line *0x7f34". If we can't tell the
1531 user about a source line, at least let them have the symbolic
1533 printf_filtered (" for address ");
1535 print_address (gdbarch, sal.pc, gdb_stdout);
1538 printf_filtered (".");
1539 printf_filtered ("\n");
1541 else if (sal.line > 0
1542 && find_line_pc_range (sal, &start_pc, &end_pc))
1544 struct gdbarch *gdbarch = get_objfile_arch (sal.symtab->objfile);
1546 if (start_pc == end_pc)
1548 printf_filtered ("Line %d of \"%s\"",
1550 symtab_to_filename_for_display (sal.symtab));
1552 printf_filtered (" is at address ");
1553 print_address (gdbarch, start_pc, gdb_stdout);
1555 printf_filtered (" but contains no code.\n");
1559 printf_filtered ("Line %d of \"%s\"",
1561 symtab_to_filename_for_display (sal.symtab));
1563 printf_filtered (" starts at address ");
1564 print_address (gdbarch, start_pc, gdb_stdout);
1566 printf_filtered (" and ends at ");
1567 print_address (gdbarch, end_pc, gdb_stdout);
1568 printf_filtered (".\n");
1571 /* x/i should display this line's code. */
1572 set_next_address (gdbarch, start_pc);
1574 /* Repeating "info line" should do the following line. */
1575 last_line_listed = sal.line + 1;
1577 /* If this is the only line, show the source code. If it could
1578 not find the file, don't do anything special. */
1579 if (annotation_level && sals.nelts == 1)
1580 identify_source_line (sal.symtab, sal.line, 0, start_pc);
1583 /* Is there any case in which we get here, and have an address
1584 which the user would want to see? If we have debugging symbols
1585 and no line numbers? */
1586 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1587 sal.line, symtab_to_filename_for_display (sal.symtab));
1589 do_cleanups (cleanups);
1592 /* Commands to search the source file for a regexp. */
1595 forward_search_command (char *regex, int from_tty)
1602 struct cleanup *cleanups;
1604 line = last_line_listed + 1;
1606 msg = (char *) re_comp (regex);
1608 error (("%s"), msg);
1610 if (current_source_symtab == 0)
1611 select_source_symtab (0);
1613 desc = open_source_file (current_source_symtab);
1615 perror_with_name (symtab_to_filename_for_display (current_source_symtab));
1616 cleanups = make_cleanup_close (desc);
1618 if (current_source_symtab->line_charpos == 0)
1619 find_source_lines (current_source_symtab, desc);
1621 if (line < 1 || line > current_source_symtab->nlines)
1622 error (_("Expression not found"));
1624 if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
1625 perror_with_name (symtab_to_filename_for_display (current_source_symtab));
1627 discard_cleanups (cleanups);
1628 stream = fdopen (desc, FDOPEN_MODE);
1630 cleanups = make_cleanup_fclose (stream);
1633 static char *buf = NULL;
1635 int cursize, newsize;
1638 buf = xmalloc (cursize);
1647 if (p - buf == cursize)
1649 newsize = cursize + cursize / 2;
1650 buf = xrealloc (buf, newsize);
1655 while (c != '\n' && (c = fgetc (stream)) >= 0);
1657 /* Remove the \r, if any, at the end of the line, otherwise
1658 regular expressions that end with $ or \n won't work. */
1659 if (p - buf > 1 && p[-2] == '\r')
1665 /* We now have a source line in buf, null terminate and match. */
1667 if (re_exec (buf) > 0)
1670 do_cleanups (cleanups);
1671 print_source_lines (current_source_symtab, line, line + 1, 0);
1672 set_internalvar_integer (lookup_internalvar ("_"), line);
1673 current_source_line = max (line - lines_to_list / 2, 1);
1679 printf_filtered (_("Expression not found\n"));
1680 do_cleanups (cleanups);
1684 reverse_search_command (char *regex, int from_tty)
1691 struct cleanup *cleanups;
1693 line = last_line_listed - 1;
1695 msg = (char *) re_comp (regex);
1697 error (("%s"), msg);
1699 if (current_source_symtab == 0)
1700 select_source_symtab (0);
1702 desc = open_source_file (current_source_symtab);
1704 perror_with_name (symtab_to_filename_for_display (current_source_symtab));
1705 cleanups = make_cleanup_close (desc);
1707 if (current_source_symtab->line_charpos == 0)
1708 find_source_lines (current_source_symtab, desc);
1710 if (line < 1 || line > current_source_symtab->nlines)
1711 error (_("Expression not found"));
1713 if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
1714 perror_with_name (symtab_to_filename_for_display (current_source_symtab));
1716 discard_cleanups (cleanups);
1717 stream = fdopen (desc, FDOPEN_MODE);
1719 cleanups = make_cleanup_fclose (stream);
1722 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1723 char buf[4096]; /* Should be reasonable??? */
1733 while (c != '\n' && (c = fgetc (stream)) >= 0);
1735 /* Remove the \r, if any, at the end of the line, otherwise
1736 regular expressions that end with $ or \n won't work. */
1737 if (p - buf > 1 && p[-2] == '\r')
1743 /* We now have a source line in buf; null terminate and match. */
1745 if (re_exec (buf) > 0)
1748 do_cleanups (cleanups);
1749 print_source_lines (current_source_symtab, line, line + 1, 0);
1750 set_internalvar_integer (lookup_internalvar ("_"), line);
1751 current_source_line = max (line - lines_to_list / 2, 1);
1755 if (fseek (stream, current_source_symtab->line_charpos[line - 1], 0) < 0)
1757 const char *filename;
1759 do_cleanups (cleanups);
1760 filename = symtab_to_filename_for_display (current_source_symtab);
1761 perror_with_name (filename);
1765 printf_filtered (_("Expression not found\n"));
1766 do_cleanups (cleanups);
1770 /* If the last character of PATH is a directory separator, then strip it. */
1773 strip_trailing_directory_separator (char *path)
1775 const int last = strlen (path) - 1;
1778 return; /* No stripping is needed if PATH is the empty string. */
1780 if (IS_DIR_SEPARATOR (path[last]))
1784 /* Return the path substitution rule that matches FROM.
1785 Return NULL if no rule matches. */
1787 static struct substitute_path_rule *
1788 find_substitute_path_rule (const char *from)
1790 struct substitute_path_rule *rule = substitute_path_rules;
1792 while (rule != NULL)
1794 if (FILENAME_CMP (rule->from, from) == 0)
1802 /* Add a new substitute-path rule at the end of the current list of rules.
1803 The new rule will replace FROM into TO. */
1806 add_substitute_path_rule (char *from, char *to)
1808 struct substitute_path_rule *rule;
1809 struct substitute_path_rule *new_rule;
1811 new_rule = xmalloc (sizeof (struct substitute_path_rule));
1812 new_rule->from = xstrdup (from);
1813 new_rule->to = xstrdup (to);
1814 new_rule->next = NULL;
1816 /* If the list of rules are empty, then insert the new rule
1817 at the head of the list. */
1819 if (substitute_path_rules == NULL)
1821 substitute_path_rules = new_rule;
1825 /* Otherwise, skip to the last rule in our list and then append
1828 rule = substitute_path_rules;
1829 while (rule->next != NULL)
1832 rule->next = new_rule;
1835 /* Remove the given source path substitution rule from the current list
1836 of rules. The memory allocated for that rule is also deallocated. */
1839 delete_substitute_path_rule (struct substitute_path_rule *rule)
1841 if (rule == substitute_path_rules)
1842 substitute_path_rules = rule->next;
1845 struct substitute_path_rule *prev = substitute_path_rules;
1847 while (prev != NULL && prev->next != rule)
1850 gdb_assert (prev != NULL);
1852 prev->next = rule->next;
1860 /* Implement the "show substitute-path" command. */
1863 show_substitute_path_command (char *args, int from_tty)
1865 struct substitute_path_rule *rule = substitute_path_rules;
1868 struct cleanup *cleanup;
1870 argv = gdb_buildargv (args);
1871 cleanup = make_cleanup_freeargv (argv);
1873 /* We expect zero or one argument. */
1875 if (argv != NULL && argv[0] != NULL && argv[1] != NULL)
1876 error (_("Too many arguments in command"));
1878 if (argv != NULL && argv[0] != NULL)
1881 /* Print the substitution rules. */
1885 (_("Source path substitution rule matching `%s':\n"), from);
1887 printf_filtered (_("List of all source path substitution rules:\n"));
1889 while (rule != NULL)
1891 if (from == NULL || substitute_path_rule_matches (rule, from) != 0)
1892 printf_filtered (" `%s' -> `%s'.\n", rule->from, rule->to);
1896 do_cleanups (cleanup);
1899 /* Implement the "unset substitute-path" command. */
1902 unset_substitute_path_command (char *args, int from_tty)
1904 struct substitute_path_rule *rule = substitute_path_rules;
1905 char **argv = gdb_buildargv (args);
1908 struct cleanup *cleanup;
1910 /* This function takes either 0 or 1 argument. */
1912 cleanup = make_cleanup_freeargv (argv);
1913 if (argv != NULL && argv[0] != NULL && argv[1] != NULL)
1914 error (_("Incorrect usage, too many arguments in command"));
1916 if (argv != NULL && argv[0] != NULL)
1919 /* If the user asked for all the rules to be deleted, ask him
1920 to confirm and give him a chance to abort before the action
1924 && !query (_("Delete all source path substitution rules? ")))
1925 error (_("Canceled"));
1927 /* Delete the rule matching the argument. No argument means that
1928 all rules should be deleted. */
1930 while (rule != NULL)
1932 struct substitute_path_rule *next = rule->next;
1934 if (from == NULL || FILENAME_CMP (from, rule->from) == 0)
1936 delete_substitute_path_rule (rule);
1943 /* If the user asked for a specific rule to be deleted but
1944 we could not find it, then report an error. */
1946 if (from != NULL && !rule_found)
1947 error (_("No substitution rule defined for `%s'"), from);
1949 forget_cached_source_info ();
1951 do_cleanups (cleanup);
1954 /* Add a new source path substitution rule. */
1957 set_substitute_path_command (char *args, int from_tty)
1960 struct substitute_path_rule *rule;
1961 struct cleanup *cleanup;
1963 argv = gdb_buildargv (args);
1964 cleanup = make_cleanup_freeargv (argv);
1966 if (argv == NULL || argv[0] == NULL || argv [1] == NULL)
1967 error (_("Incorrect usage, too few arguments in command"));
1969 if (argv[2] != NULL)
1970 error (_("Incorrect usage, too many arguments in command"));
1972 if (*(argv[0]) == '\0')
1973 error (_("First argument must be at least one character long"));
1975 /* Strip any trailing directory separator character in either FROM
1976 or TO. The substitution rule already implicitly contains them. */
1977 strip_trailing_directory_separator (argv[0]);
1978 strip_trailing_directory_separator (argv[1]);
1980 /* If a rule with the same "from" was previously defined, then
1981 delete it. This new rule replaces it. */
1983 rule = find_substitute_path_rule (argv[0]);
1985 delete_substitute_path_rule (rule);
1987 /* Insert the new substitution rule. */
1989 add_substitute_path_rule (argv[0], argv[1]);
1990 forget_cached_source_info ();
1992 do_cleanups (cleanup);
1997 _initialize_source (void)
1999 struct cmd_list_element *c;
2001 current_source_symtab = 0;
2002 init_source_path ();
2004 /* The intention is to use POSIX Basic Regular Expressions.
2005 Always use the GNU regex routine for consistency across all hosts.
2006 Our current GNU regex.c does not have all the POSIX features, so this is
2007 just an approximation. */
2008 re_set_syntax (RE_SYNTAX_GREP);
2010 c = add_cmd ("directory", class_files, directory_command, _("\
2011 Add directory DIR to beginning of search path for source files.\n\
2012 Forget cached info on source file locations and line positions.\n\
2013 DIR can also be $cwd for the current working directory, or $cdir for the\n\
2014 directory in which the source file was compiled into object code.\n\
2015 With no argument, reset the search path to $cdir:$cwd, the default."),
2019 add_com_alias ("use", "directory", class_files, 0);
2021 set_cmd_completer (c, filename_completer);
2023 add_setshow_optional_filename_cmd ("directories",
2027 Set the search path for finding source files."),
2029 Show the search path for finding source files."),
2031 $cwd in the path means the current working directory.\n\
2032 $cdir in the path means the compilation directory of the source file.\n\
2033 GDB ensures the search path always ends with $cdir:$cwd by\n\
2034 appending these directories if necessary.\n\
2035 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
2036 set_directories_command,
2037 show_directories_command,
2038 &setlist, &showlist);
2042 add_com_alias ("D", "directory", class_files, 0);
2043 add_cmd ("ld", no_class, show_directories_1, _("\
2044 Current search path for finding source files.\n\
2045 $cwd in the path means the current working directory.\n\
2046 $cdir in the path means the compilation directory of the source file."),
2050 add_info ("source", source_info,
2051 _("Information about the current source file."));
2053 add_info ("line", line_info, _("\
2054 Core addresses of the code for a source line.\n\
2055 Line can be specified as\n\
2056 LINENUM, to list around that line in current file,\n\
2057 FILE:LINENUM, to list around that line in that file,\n\
2058 FUNCTION, to list around beginning of that function,\n\
2059 FILE:FUNCTION, to distinguish among like-named static functions.\n\
2060 Default is to describe the last source line that was listed.\n\n\
2061 This sets the default address for \"x\" to the line's first instruction\n\
2062 so that \"x/i\" suffices to start examining the machine code.\n\
2063 The address is also stored as the value of \"$_\"."));
2065 add_com ("forward-search", class_files, forward_search_command, _("\
2066 Search for regular expression (see regex(3)) from last line listed.\n\
2067 The matching line number is also stored as the value of \"$_\"."));
2068 add_com_alias ("search", "forward-search", class_files, 0);
2069 add_com_alias ("fo", "forward-search", class_files, 1);
2071 add_com ("reverse-search", class_files, reverse_search_command, _("\
2072 Search backward for regular expression (see regex(3)) from last line listed.\n\
2073 The matching line number is also stored as the value of \"$_\"."));
2074 add_com_alias ("rev", "reverse-search", class_files, 1);
2078 add_com_alias ("/", "forward-search", class_files, 0);
2079 add_com_alias ("?", "reverse-search", class_files, 0);
2082 add_setshow_integer_cmd ("listsize", class_support, &lines_to_list, _("\
2083 Set number of source lines gdb will list by default."), _("\
2084 Show number of source lines gdb will list by default."), _("\
2085 Use this to choose how many source lines the \"list\" displays (unless\n\
2086 the \"list\" argument explicitly specifies some other number).\n\
2087 A value of \"unlimited\", or zero, means there's no limit."),
2090 &setlist, &showlist);
2092 add_cmd ("substitute-path", class_files, set_substitute_path_command,
2094 Usage: set substitute-path FROM TO\n\
2095 Add a substitution rule replacing FROM into TO in source file names.\n\
2096 If a substitution rule was previously set for FROM, the old rule\n\
2097 is replaced by the new one."),
2100 add_cmd ("substitute-path", class_files, unset_substitute_path_command,
2102 Usage: unset substitute-path [FROM]\n\
2103 Delete the rule for substituting FROM in source file names. If FROM\n\
2104 is not specified, all substituting rules are deleted.\n\
2105 If the debugger cannot find a rule for FROM, it will display a warning."),
2108 add_cmd ("substitute-path", class_files, show_substitute_path_command,
2110 Usage: show substitute-path [FROM]\n\
2111 Print the rule for substituting FROM in source file names. If FROM\n\
2112 is not specified, print all substitution rules."),
2115 add_setshow_enum_cmd ("filename-display", class_files,
2116 filename_display_kind_names,
2117 &filename_display_string, _("\
2118 Set how to display filenames."), _("\
2119 Show how to display filenames."), _("\
2120 filename-display can be:\n\
2121 basename - display only basename of a filename\n\
2122 relative - display a filename relative to the compilation directory\n\
2123 absolute - display an absolute filename\n\
2124 By default, relative filenames are displayed."),
2126 show_filename_display_string,
2127 &setlist, &showlist);