1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1986-2019 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"
45 #include "common/scoped_fd.h"
47 #include "common/pathstuff.h"
48 #include "source-cache.h"
50 #define OPEN_MODE (O_RDONLY | O_BINARY)
51 #define FDOPEN_MODE FOPEN_RB
53 /* Path of directories to search for source files.
54 Same format as the PATH environment variable's value. */
58 /* Support for source path substitution commands. */
60 struct substitute_path_rule
64 struct substitute_path_rule *next;
67 static struct substitute_path_rule *substitute_path_rules = NULL;
69 /* Symtab of default file for listing lines of. */
71 static struct symtab *current_source_symtab;
73 /* Default next line to list. */
75 static int current_source_line;
77 static struct program_space *current_source_pspace;
79 /* Default number of lines to print with commands like "list".
80 This is based on guessing how many long (i.e. more than chars_per_line
81 characters) lines there will be. To be completely correct, "list"
82 and friends should be rewritten to count characters and see where
83 things are wrapping, but that would be a fair amount of work. */
85 static int lines_to_list = 10;
87 show_lines_to_list (struct ui_file *file, int from_tty,
88 struct cmd_list_element *c, const char *value)
90 fprintf_filtered (file,
91 _("Number of source lines gdb "
92 "will list by default is %s.\n"),
96 /* Possible values of 'set filename-display'. */
97 static const char filename_display_basename[] = "basename";
98 static const char filename_display_relative[] = "relative";
99 static const char filename_display_absolute[] = "absolute";
101 static const char *const filename_display_kind_names[] = {
102 filename_display_basename,
103 filename_display_relative,
104 filename_display_absolute,
108 static const char *filename_display_string = filename_display_relative;
111 show_filename_display_string (struct ui_file *file, int from_tty,
112 struct cmd_list_element *c, const char *value)
114 fprintf_filtered (file, _("Filenames are displayed as \"%s\".\n"), value);
117 /* Line number of last line printed. Default for various commands.
118 current_source_line is usually, but not always, the same as this. */
120 static int last_line_listed;
122 /* First line number listed by last listing command. If 0, then no
123 source lines have yet been listed since the last time the current
124 source line was changed. */
126 static int first_line_listed;
128 /* Saves the name of the last source file visited and a possible error code.
129 Used to prevent repeating annoying "No such file or directories" msgs. */
131 static struct symtab *last_source_visited = NULL;
132 static int last_source_error = 0;
134 /* Return the first line listed by print_source_lines.
135 Used by command interpreters to request listing from
139 get_first_line_listed (void)
141 return first_line_listed;
144 /* Clear line listed range. This makes the next "list" center the
145 printed source lines around the current source line. */
148 clear_lines_listed_range (void)
150 first_line_listed = 0;
151 last_line_listed = 0;
154 /* Return the default number of lines to print with commands like the
155 cli "list". The caller of print_source_lines must use this to
156 calculate the end line and use it in the call to print_source_lines
157 as it does not automatically use this value. */
160 get_lines_to_list (void)
162 return lines_to_list;
165 /* Return the current source file for listing and next line to list.
166 NOTE: The returned sal pc and end fields are not valid. */
168 struct symtab_and_line
169 get_current_source_symtab_and_line (void)
171 symtab_and_line cursal;
173 cursal.pspace = current_source_pspace;
174 cursal.symtab = current_source_symtab;
175 cursal.line = current_source_line;
182 /* If the current source file for listing is not set, try and get a default.
183 Usually called before get_current_source_symtab_and_line() is called.
184 It may err out if a default cannot be determined.
185 We must be cautious about where it is called, as it can recurse as the
186 process of determining a new default may call the caller!
187 Use get_current_source_symtab_and_line only to get whatever
188 we have without erroring out or trying to get a default. */
191 set_default_source_symtab_and_line (void)
193 if (!have_full_symbols () && !have_partial_symbols ())
194 error (_("No symbol table is loaded. Use the \"file\" command."));
196 /* Pull in a current source symtab if necessary. */
197 if (current_source_symtab == 0)
198 select_source_symtab (0);
201 /* Return the current default file for listing and next line to list
202 (the returned sal pc and end fields are not valid.)
203 and set the current default to whatever is in SAL.
204 NOTE: The returned sal pc and end fields are not valid. */
206 struct symtab_and_line
207 set_current_source_symtab_and_line (const symtab_and_line &sal)
209 symtab_and_line cursal;
211 cursal.pspace = current_source_pspace;
212 cursal.symtab = current_source_symtab;
213 cursal.line = current_source_line;
217 current_source_pspace = sal.pspace;
218 current_source_symtab = sal.symtab;
219 current_source_line = sal.line;
221 /* Force the next "list" to center around the current line. */
222 clear_lines_listed_range ();
227 /* Reset any information stored about a default file and line to print. */
230 clear_current_source_symtab_and_line (void)
232 current_source_symtab = 0;
233 current_source_line = 0;
236 /* Set the source file default for the "list" command to be S.
238 If S is NULL, and we don't have a default, find one. This
239 should only be called when the user actually tries to use the
240 default, since we produce an error if we can't find a reasonable
241 default. Also, since this can cause symbols to be read, doing it
242 before we need to would make things slower than necessary. */
245 select_source_symtab (struct symtab *s)
248 struct compunit_symtab *cu;
252 current_source_symtab = s;
253 current_source_line = 1;
254 current_source_pspace = SYMTAB_PSPACE (s);
258 if (current_source_symtab)
261 /* Make the default place to list be the function `main'
263 if (lookup_symbol (main_name (), 0, VAR_DOMAIN, 0).symbol)
265 std::vector<symtab_and_line> sals
266 = decode_line_with_current_source (main_name (),
267 DECODE_LINE_FUNFIRSTLINE);
268 const symtab_and_line &sal = sals[0];
269 current_source_pspace = sal.pspace;
270 current_source_symtab = sal.symtab;
271 current_source_line = std::max (sal.line - (lines_to_list - 1), 1);
272 if (current_source_symtab)
276 /* Alright; find the last file in the symtab list (ignoring .h's
277 and namespace symtabs). */
279 current_source_line = 1;
281 ALL_FILETABS (ofp, cu, s)
283 const char *name = s->filename;
284 int len = strlen (name);
286 if (!(len > 2 && (strcmp (&name[len - 2], ".h") == 0
287 || strcmp (name, "<<C++-namespaces>>") == 0)))
289 current_source_pspace = current_program_space;
290 current_source_symtab = s;
294 if (current_source_symtab)
300 s = ofp->sf->qf->find_last_source_symtab (ofp);
302 current_source_symtab = s;
304 if (current_source_symtab)
307 error (_("Can't find a default source file"));
310 /* Handler for "set directories path-list" command.
311 "set dir mumble" doesn't prepend paths, it resets the entire
312 path list. The theory is that set(show(dir)) should be a no-op. */
315 set_directories_command (const char *args,
316 int from_tty, struct cmd_list_element *c)
318 /* This is the value that was set.
319 It needs to be processed to maintain $cdir:$cwd and remove dups. */
320 char *set_path = source_path;
322 /* We preserve the invariant that $cdir:$cwd begins life at the end of
323 the list by calling init_source_path. If they appear earlier in
324 SET_PATH then mod_path will move them appropriately.
325 mod_path will also remove duplicates. */
327 if (*set_path != '\0')
328 mod_path (set_path, &source_path);
333 /* Print the list of source directories.
334 This is used by the "ld" command, so it has the signature of a command
338 show_directories_1 (char *ignore, int from_tty)
340 puts_filtered ("Source directories searched: ");
341 puts_filtered (source_path);
342 puts_filtered ("\n");
345 /* Handler for "show directories" command. */
348 show_directories_command (struct ui_file *file, int from_tty,
349 struct cmd_list_element *c, const char *value)
351 show_directories_1 (NULL, from_tty);
354 /* Forget line positions and file names for the symtabs in a
355 particular objfile. */
358 forget_cached_source_info_for_objfile (struct objfile *objfile)
360 struct compunit_symtab *cu;
363 ALL_OBJFILE_FILETABS (objfile, cu, s)
365 if (s->line_charpos != NULL)
367 xfree (s->line_charpos);
368 s->line_charpos = NULL;
370 if (s->fullname != NULL)
378 objfile->sf->qf->forget_cached_source_info (objfile);
381 /* Forget what we learned about line positions in source files, and
382 which directories contain them; must check again now since files
383 may be found in a different directory now. */
386 forget_cached_source_info (void)
388 struct program_space *pspace;
389 struct objfile *objfile;
392 ALL_PSPACE_OBJFILES (pspace, objfile)
394 forget_cached_source_info_for_objfile (objfile);
397 g_source_cache.clear ();
398 last_source_visited = NULL;
402 init_source_path (void)
406 xsnprintf (buf, sizeof (buf), "$cdir%c$cwd", DIRNAME_SEPARATOR);
407 source_path = xstrdup (buf);
408 forget_cached_source_info ();
411 /* Add zero or more directories to the front of the source path. */
414 directory_command (const char *dirname, int from_tty)
417 /* FIXME, this goes to "delete dir"... */
420 if (!from_tty || query (_("Reinitialize source path to empty? ")))
428 mod_path (dirname, &source_path);
429 forget_cached_source_info ();
432 show_directories_1 ((char *) 0, from_tty);
435 /* Add a path given with the -d command line switch.
436 This will not be quoted so we must not treat spaces as separators. */
439 directory_switch (const char *dirname, int from_tty)
441 add_path (dirname, &source_path, 0);
444 /* Add zero or more directories to the front of an arbitrary path. */
447 mod_path (const char *dirname, char **which_path)
449 add_path (dirname, which_path, 1);
452 /* Workhorse of mod_path. Takes an extra argument to determine
453 if dirname should be parsed for separators that indicate multiple
454 directories. This allows for interfaces that pre-parse the dirname
455 and allow specification of traditional separator characters such
459 add_path (const char *dirname, char **which_path, int parse_separators)
461 char *old = *which_path;
463 std::vector<gdb::unique_xmalloc_ptr<char>> dir_vec;
468 if (parse_separators)
470 /* This will properly parse the space and tab separators
471 and any quotes that may exist. */
472 gdb_argv argv (dirname);
474 for (char *arg : argv)
475 dirnames_to_char_ptr_vec_append (&dir_vec, arg);
478 dir_vec.emplace_back (xstrdup (dirname));
480 for (const gdb::unique_xmalloc_ptr<char> &name_up : dir_vec)
482 char *name = name_up.get ();
485 gdb::unique_xmalloc_ptr<char> new_name_holder;
487 /* Spaces and tabs will have been removed by buildargv().
488 NAME is the start of the directory.
489 P is the '\0' following the end. */
490 p = name + strlen (name);
492 while (!(IS_DIR_SEPARATOR (*name) && p <= name + 1) /* "/" */
493 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
494 /* On MS-DOS and MS-Windows, h:\ is different from h: */
495 && !(p == name + 3 && name[1] == ':') /* "d:/" */
497 && IS_DIR_SEPARATOR (p[-1]))
498 /* Sigh. "foo/" => "foo" */
502 while (p > name && p[-1] == '.')
506 /* "." => getwd (). */
507 name = current_directory;
510 else if (p > name + 1 && IS_DIR_SEPARATOR (p[-2]))
520 /* "...foo/." => "...foo". */
531 new_name_holder.reset (tilde_expand (name));
532 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
533 else if (IS_ABSOLUTE_PATH (name) && p == name + 2) /* "d:" => "d:." */
534 new_name_holder.reset (concat (name, ".", (char *) NULL));
536 else if (!IS_ABSOLUTE_PATH (name) && name[0] != '$')
537 new_name_holder.reset (concat (current_directory, SLASH_STRING, name,
540 new_name_holder.reset (savestring (name, p - name));
541 name = new_name_holder.get ();
543 /* Unless it's a variable, check existence. */
546 /* These are warnings, not errors, since we don't want a
547 non-existent directory in a .gdbinit file to stop processing
548 of the .gdbinit file.
550 Whether they get added to the path is more debatable. Current
551 answer is yes, in case the user wants to go make the directory
552 or whatever. If the directory continues to not exist/not be
553 a directory/etc, then having them in the path should be
555 if (stat (name, &st) < 0)
557 int save_errno = errno;
559 fprintf_unfiltered (gdb_stderr, "Warning: ");
560 print_sys_errmsg (name, save_errno);
562 else if ((st.st_mode & S_IFMT) != S_IFDIR)
563 warning (_("%s is not a directory."), name);
568 unsigned int len = strlen (name);
574 /* FIXME: we should use realpath() or its work-alike
575 before comparing. Then all the code above which
576 removes excess slashes and dots could simply go away. */
577 if (!filename_ncmp (p, name, len)
578 && (p[len] == '\0' || p[len] == DIRNAME_SEPARATOR))
580 /* Found it in the search path, remove old copy. */
583 /* Back over leading separator. */
586 if (prefix > p - *which_path)
588 /* Same dir twice in one cmd. */
591 /* Copy from next '\0' or ':'. */
592 memmove (p, &p[len + 1], strlen (&p[len + 1]) + 1);
594 p = strchr (p, DIRNAME_SEPARATOR);
601 tinybuf[0] = DIRNAME_SEPARATOR;
604 /* If we have already tacked on a name(s) in this command,
605 be sure they stay on the front as we tack on some
613 temp = concat (old, tinybuf, name, (char *)NULL);
615 *which_path = concat (temp, "", &old[prefix], (char *) NULL);
616 prefix = strlen (temp);
621 *which_path = concat (name, (old[0] ? tinybuf : old),
623 prefix = strlen (name);
635 info_source_command (const char *ignore, int from_tty)
637 struct symtab *s = current_source_symtab;
638 struct compunit_symtab *cust;
642 printf_filtered (_("No current source file.\n"));
646 cust = SYMTAB_COMPUNIT (s);
647 printf_filtered (_("Current source file is %s\n"), s->filename);
648 if (SYMTAB_DIRNAME (s) != NULL)
649 printf_filtered (_("Compilation directory is %s\n"), SYMTAB_DIRNAME (s));
651 printf_filtered (_("Located in %s\n"), s->fullname);
653 printf_filtered (_("Contains %d line%s.\n"), s->nlines,
654 s->nlines == 1 ? "" : "s");
656 printf_filtered (_("Source language is %s.\n"), language_str (s->language));
657 printf_filtered (_("Producer is %s.\n"),
658 COMPUNIT_PRODUCER (cust) != NULL
659 ? COMPUNIT_PRODUCER (cust) : _("unknown"));
660 printf_filtered (_("Compiled with %s debugging format.\n"),
661 COMPUNIT_DEBUGFORMAT (cust));
662 printf_filtered (_("%s preprocessor macro info.\n"),
663 COMPUNIT_MACRO_TABLE (cust) != NULL
664 ? "Includes" : "Does not include");
668 /* Open a file named STRING, searching path PATH (dir names sep by some char)
669 using mode MODE in the calls to open. You cannot use this function to
670 create files (O_CREAT).
672 OPTS specifies the function behaviour in specific cases.
674 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
675 (ie pretend the first element of PATH is "."). This also indicates
676 that, unless OPF_SEARCH_IN_PATH is also specified, a slash in STRING
677 disables searching of the path (this is so that "exec-file ./foo" or
678 "symbol-file ./foo" insures that you get that particular version of
679 foo or an error message).
681 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
682 searched in path (we usually want this for source files but not for
685 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
686 the actual file opened (this string will always start with a "/"). We
687 have to take special pains to avoid doubling the "/" between the directory
688 and the file, sigh! Emacs gets confuzzed by this when we print the
691 If OPTS has OPF_RETURN_REALPATH set return FILENAME_OPENED resolved by
692 gdb_realpath. Even without OPF_RETURN_REALPATH this function still returns
693 filename starting with "/". If FILENAME_OPENED is NULL this option has no
696 If a file is found, return the descriptor.
697 Otherwise, return -1, with errno set for the last name we tried to open. */
699 /* >>>> This should only allow files of certain types,
700 >>>> eg executable, non-directory. */
702 openp (const char *path, openp_flags opts, const char *string,
703 int mode, gdb::unique_xmalloc_ptr<char> *filename_opened)
708 /* The errno set for the last name we tried to open (and
711 std::vector<gdb::unique_xmalloc_ptr<char>> dir_vec;
713 /* The open syscall MODE parameter is not specified. */
714 gdb_assert ((mode & O_CREAT) == 0);
715 gdb_assert (string != NULL);
717 /* A file with an empty name cannot possibly exist. Report a failure
718 without further checking.
720 This is an optimization which also defends us against buggy
721 implementations of the "stat" function. For instance, we have
722 noticed that a MinGW debugger built on Windows XP 32bits crashes
723 when the debugger is started with an empty argument. */
724 if (string[0] == '\0')
735 if ((opts & OPF_TRY_CWD_FIRST) || IS_ABSOLUTE_PATH (string))
737 int i, reg_file_errno;
739 if (is_regular_file (string, ®_file_errno))
741 filename = (char *) alloca (strlen (string) + 1);
742 strcpy (filename, string);
743 fd = gdb_open_cloexec (filename, mode, 0);
752 last_errno = reg_file_errno;
755 if (!(opts & OPF_SEARCH_IN_PATH))
756 for (i = 0; string[i]; i++)
757 if (IS_DIR_SEPARATOR (string[i]))
761 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
762 if (HAS_DRIVE_SPEC (string))
763 string = STRIP_DRIVE_SPEC (string);
765 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
766 while (IS_DIR_SEPARATOR(string[0]))
770 while (string[0] == '.' && IS_DIR_SEPARATOR (string[1]))
773 alloclen = strlen (path) + strlen (string) + 2;
774 filename = (char *) alloca (alloclen);
778 dir_vec = dirnames_to_char_ptr_vec (path);
780 for (const gdb::unique_xmalloc_ptr<char> &dir_up : dir_vec)
782 char *dir = dir_up.get ();
783 size_t len = strlen (dir);
786 if (strcmp (dir, "$cwd") == 0)
788 /* Name is $cwd -- insert current directory name instead. */
791 /* First, realloc the filename buffer if too short. */
792 len = strlen (current_directory);
793 newlen = len + strlen (string) + 2;
794 if (newlen > alloclen)
797 filename = (char *) alloca (alloclen);
799 strcpy (filename, current_directory);
801 else if (strchr(dir, '~'))
803 /* See whether we need to expand the tilde. */
806 gdb::unique_xmalloc_ptr<char> tilde_expanded (tilde_expand (dir));
808 /* First, realloc the filename buffer if too short. */
809 len = strlen (tilde_expanded.get ());
810 newlen = len + strlen (string) + 2;
811 if (newlen > alloclen)
814 filename = (char *) alloca (alloclen);
816 strcpy (filename, tilde_expanded.get ());
820 /* Normal file name in path -- just use it. */
821 strcpy (filename, dir);
823 /* Don't search $cdir. It's also a magic path like $cwd, but we
824 don't have enough information to expand it. The user *could*
825 have an actual directory named '$cdir' but handling that would
826 be confusing, it would mean different things in different
827 contexts. If the user really has '$cdir' one can use './$cdir'.
828 We can get $cdir when loading scripts. When loading source files
829 $cdir must have already been expanded to the correct value. */
830 if (strcmp (dir, "$cdir") == 0)
834 /* Remove trailing slashes. */
835 while (len > 0 && IS_DIR_SEPARATOR (filename[len - 1]))
838 strcat (filename + len, SLASH_STRING);
839 strcat (filename, string);
841 if (is_regular_file (filename, ®_file_errno))
843 fd = gdb_open_cloexec (filename, mode, 0);
849 last_errno = reg_file_errno;
855 /* If a file was opened, canonicalize its filename. */
857 filename_opened->reset (NULL);
858 else if ((opts & OPF_RETURN_REALPATH) != 0)
859 *filename_opened = gdb_realpath (filename);
861 *filename_opened = gdb_abspath (filename);
869 /* This is essentially a convenience, for clients that want the behaviour
870 of openp, using source_path, but that really don't want the file to be
871 opened but want instead just to know what the full pathname is (as
872 qualified against source_path).
874 The current working directory is searched first.
876 If the file was found, this function returns 1, and FULL_PATHNAME is
877 set to the fully-qualified pathname.
879 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
881 source_full_path_of (const char *filename,
882 gdb::unique_xmalloc_ptr<char> *full_pathname)
886 fd = openp (source_path,
887 OPF_TRY_CWD_FIRST | OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH,
888 filename, O_RDONLY, full_pathname);
891 full_pathname->reset (NULL);
899 /* Return non-zero if RULE matches PATH, that is if the rule can be
903 substitute_path_rule_matches (const struct substitute_path_rule *rule,
906 const int from_len = strlen (rule->from);
907 const int path_len = strlen (path);
909 if (path_len < from_len)
912 /* The substitution rules are anchored at the start of the path,
913 so the path should start with rule->from. */
915 if (filename_ncmp (path, rule->from, from_len) != 0)
918 /* Make sure that the region in the path that matches the substitution
919 rule is immediately followed by a directory separator (or the end of
920 string character). */
922 if (path[from_len] != '\0' && !IS_DIR_SEPARATOR (path[from_len]))
928 /* Find the substitute-path rule that applies to PATH and return it.
929 Return NULL if no rule applies. */
931 static struct substitute_path_rule *
932 get_substitute_path_rule (const char *path)
934 struct substitute_path_rule *rule = substitute_path_rules;
936 while (rule != NULL && !substitute_path_rule_matches (rule, path))
942 /* If the user specified a source path substitution rule that applies
943 to PATH, then apply it and return the new path.
945 Return NULL if no substitution rule was specified by the user,
946 or if no rule applied to the given PATH. */
948 gdb::unique_xmalloc_ptr<char>
949 rewrite_source_path (const char *path)
951 const struct substitute_path_rule *rule = get_substitute_path_rule (path);
958 from_len = strlen (rule->from);
960 /* Compute the rewritten path and return it. */
963 (char *) xmalloc (strlen (path) + 1 + strlen (rule->to) - from_len);
964 strcpy (new_path, rule->to);
965 strcat (new_path, path + from_len);
967 return gdb::unique_xmalloc_ptr<char> (new_path);
973 find_and_open_source (const char *filename,
975 gdb::unique_xmalloc_ptr<char> *fullname)
977 char *path = source_path;
981 /* Quick way out if we already know its full name. */
985 /* The user may have requested that source paths be rewritten
986 according to substitution rules he provided. If a substitution
987 rule applies to this path, then apply it. */
988 gdb::unique_xmalloc_ptr<char> rewritten_fullname
989 = rewrite_source_path (fullname->get ());
991 if (rewritten_fullname != NULL)
992 *fullname = std::move (rewritten_fullname);
994 result = gdb_open_cloexec (fullname->get (), OPEN_MODE, 0);
997 *fullname = gdb_realpath (fullname->get ());
998 return scoped_fd (result);
1001 /* Didn't work -- free old one, try again. */
1002 fullname->reset (NULL);
1005 gdb::unique_xmalloc_ptr<char> rewritten_dirname;
1006 if (dirname != NULL)
1008 /* If necessary, rewrite the compilation directory name according
1009 to the source path substitution rules specified by the user. */
1011 rewritten_dirname = rewrite_source_path (dirname);
1013 if (rewritten_dirname != NULL)
1014 dirname = rewritten_dirname.get ();
1016 /* Replace a path entry of $cdir with the compilation directory
1019 /* We cast strstr's result in case an ANSIhole has made it const,
1020 which produces a "required warning" when assigned to a nonconst. */
1021 p = (char *) strstr (source_path, "$cdir");
1022 if (p && (p == path || p[-1] == DIRNAME_SEPARATOR)
1023 && (p[cdir_len] == DIRNAME_SEPARATOR || p[cdir_len] == '\0'))
1028 alloca (strlen (source_path) + 1 + strlen (dirname) + 1);
1029 len = p - source_path;
1030 strncpy (path, source_path, len); /* Before $cdir */
1031 strcpy (path + len, dirname); /* new stuff */
1032 strcat (path + len, source_path + len + cdir_len); /* After
1037 gdb::unique_xmalloc_ptr<char> rewritten_filename;
1038 if (IS_ABSOLUTE_PATH (filename))
1040 /* If filename is absolute path, try the source path
1041 substitution on it. */
1042 rewritten_filename = rewrite_source_path (filename);
1044 if (rewritten_filename != NULL)
1045 filename = rewritten_filename.get ();
1048 result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, filename,
1049 OPEN_MODE, fullname);
1052 /* Didn't work. Try using just the basename. */
1053 p = lbasename (filename);
1055 result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, p,
1056 OPEN_MODE, fullname);
1059 return scoped_fd (result);
1062 /* Open a source file given a symtab S. Returns a file descriptor or
1063 negative number for error.
1065 This function is a convience function to find_and_open_source. */
1068 open_source_file (struct symtab *s)
1071 return scoped_fd (-1);
1073 gdb::unique_xmalloc_ptr<char> fullname (s->fullname);
1075 scoped_fd fd = find_and_open_source (s->filename, SYMTAB_DIRNAME (s),
1077 s->fullname = fullname.release ();
1081 /* Finds the fullname that a symtab represents.
1083 This functions finds the fullname and saves it in s->fullname.
1084 It will also return the value.
1086 If this function fails to find the file that this symtab represents,
1087 the expected fullname is used. Therefore the files does not have to
1091 symtab_to_fullname (struct symtab *s)
1093 /* Use cached copy if we have it.
1094 We rely on forget_cached_source_info being called appropriately
1095 to handle cases like the file being moved. */
1096 if (s->fullname == NULL)
1098 scoped_fd fd = open_source_file (s);
1102 gdb::unique_xmalloc_ptr<char> fullname;
1104 /* rewrite_source_path would be applied by find_and_open_source, we
1105 should report the pathname where GDB tried to find the file. */
1107 if (SYMTAB_DIRNAME (s) == NULL || IS_ABSOLUTE_PATH (s->filename))
1108 fullname.reset (xstrdup (s->filename));
1110 fullname.reset (concat (SYMTAB_DIRNAME (s), SLASH_STRING,
1111 s->filename, (char *) NULL));
1113 s->fullname = rewrite_source_path (fullname.get ()).release ();
1114 if (s->fullname == NULL)
1115 s->fullname = fullname.release ();
1122 /* See commentary in source.h. */
1125 symtab_to_filename_for_display (struct symtab *symtab)
1127 if (filename_display_string == filename_display_basename)
1128 return lbasename (symtab->filename);
1129 else if (filename_display_string == filename_display_absolute)
1130 return symtab_to_fullname (symtab);
1131 else if (filename_display_string == filename_display_relative)
1132 return symtab->filename;
1134 internal_error (__FILE__, __LINE__, _("invalid filename_display_string"));
1137 /* Create and initialize the table S->line_charpos that records
1138 the positions of the lines in the source file, which is assumed
1139 to be open on descriptor DESC.
1140 All set S->nlines to the number of such lines. */
1143 find_source_lines (struct symtab *s, int desc)
1148 int lines_allocated = 1000;
1154 line_charpos = XNEWVEC (int, lines_allocated);
1155 if (fstat (desc, &st) < 0)
1156 perror_with_name (symtab_to_filename_for_display (s));
1158 if (SYMTAB_OBJFILE (s) != NULL && SYMTAB_OBJFILE (s)->obfd != NULL)
1159 mtime = SYMTAB_OBJFILE (s)->mtime;
1161 mtime = exec_bfd_mtime;
1163 if (mtime && mtime < st.st_mtime)
1164 warning (_("Source file is more recent than executable."));
1167 /* st_size might be a large type, but we only support source files whose
1168 size fits in an int. */
1169 size = (int) st.st_size;
1171 /* Use the heap, not the stack, because this may be pretty large,
1172 and we may run into various kinds of limits on stack size. */
1173 gdb::def_vector<char> data (size);
1175 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1176 size = myread (desc, data.data (), size);
1178 perror_with_name (symtab_to_filename_for_display (s));
1179 end = data.data () + size;
1181 line_charpos[0] = 0;
1186 /* A newline at the end does not start a new line. */
1189 if (nlines == lines_allocated)
1191 lines_allocated *= 2;
1193 (int *) xrealloc ((char *) line_charpos,
1194 sizeof (int) * lines_allocated);
1196 line_charpos[nlines++] = p - data.data ();
1203 (int *) xrealloc ((char *) line_charpos, nlines * sizeof (int));
1209 /* Get full pathname and line number positions for a symtab.
1210 Set *FULLNAME to actual name of the file as found by `openp',
1211 or to 0 if the file is not found. */
1214 get_filename_and_charpos (struct symtab *s, char **fullname)
1216 scoped_fd desc = open_source_file (s);
1217 if (desc.get () < 0)
1224 *fullname = s->fullname;
1225 if (s->line_charpos == 0)
1226 find_source_lines (s, desc.get ());
1229 /* Print text describing the full name of the source file S
1230 and the line number LINE and its corresponding character position.
1231 The text starts with two Ctrl-z so that the Emacs-GDB interface
1234 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1236 Return 1 if successful, 0 if could not find the file. */
1239 identify_source_line (struct symtab *s, int line, int mid_statement,
1242 if (s->line_charpos == 0)
1243 get_filename_and_charpos (s, (char **) NULL);
1244 if (s->fullname == 0)
1246 if (line > s->nlines)
1247 /* Don't index off the end of the line_charpos array. */
1249 annotate_source (s->fullname, line, s->line_charpos[line - 1],
1250 mid_statement, get_objfile_arch (SYMTAB_OBJFILE (s)), pc);
1252 current_source_line = line;
1253 current_source_symtab = s;
1254 clear_lines_listed_range ();
1259 /* Print source lines from the file of symtab S,
1260 starting with line number LINE and stopping before line number STOPLINE. */
1263 print_source_lines_base (struct symtab *s, int line, int stopline,
1264 print_source_lines_flags flags)
1269 int nlines = stopline - line;
1270 struct ui_out *uiout = current_uiout;
1272 /* Regardless of whether we can open the file, set current_source_symtab. */
1273 current_source_symtab = s;
1274 current_source_line = line;
1275 first_line_listed = line;
1277 /* If printing of source lines is disabled, just print file and line
1279 if (uiout->test_flags (ui_source_list))
1281 /* Only prints "No such file or directory" once. */
1282 if ((s != last_source_visited) || (!last_source_error))
1284 last_source_visited = s;
1285 desc = open_source_file (s);
1286 if (desc.get () < 0)
1288 last_source_error = desc.get ();
1294 flags |= PRINT_SOURCE_LINES_NOERROR;
1300 flags |= PRINT_SOURCE_LINES_NOERROR;
1306 if (!(flags & PRINT_SOURCE_LINES_NOERROR))
1308 const char *filename = symtab_to_filename_for_display (s);
1309 int len = strlen (filename) + 100;
1310 char *name = (char *) alloca (len);
1312 xsnprintf (name, len, "%d\t%s", line, filename);
1313 print_sys_errmsg (name, errno);
1317 uiout->field_int ("line", line);
1318 uiout->text ("\tin ");
1320 /* CLI expects only the "file" field. TUI expects only the
1321 "fullname" field (and TUI does break if "file" is printed).
1322 MI expects both fields. ui_source_list is set only for CLI,
1324 if (uiout->is_mi_like_p () || uiout->test_flags (ui_source_list))
1325 uiout->field_string ("file", symtab_to_filename_for_display (s),
1326 ui_out_style_kind::FILE);
1327 if (uiout->is_mi_like_p () || !uiout->test_flags (ui_source_list))
1329 const char *s_fullname = symtab_to_fullname (s);
1330 char *local_fullname;
1332 /* ui_out_field_string may free S_FULLNAME by calling
1333 open_source_file for it again. See e.g.,
1334 tui_field_string->tui_show_source. */
1335 local_fullname = (char *) alloca (strlen (s_fullname) + 1);
1336 strcpy (local_fullname, s_fullname);
1338 uiout->field_string ("fullname", local_fullname);
1347 last_source_error = 0;
1350 if (!g_source_cache.get_source_lines (s, line, stopline - 1, &lines))
1351 error (_("Line number %d out of range; %s has %d lines."),
1352 line, symtab_to_filename_for_display (s), s->nlines);
1354 const char *iter = lines.c_str ();
1355 while (nlines-- > 0)
1362 last_line_listed = current_source_line;
1363 if (flags & PRINT_SOURCE_LINES_FILENAME)
1365 uiout->text (symtab_to_filename_for_display (s));
1368 xsnprintf (buf, sizeof (buf), "%d\t", current_source_line++);
1372 if (c < 040 && c != '\t' && c != '\n' && c != '\r' && c != '\033')
1374 xsnprintf (buf, sizeof (buf), "^%c", c + 0100);
1381 /* Skip a \r character, but only before a \n. */
1382 if (iter[1] == '\n')
1388 printf_filtered ("^%c", c + 0100);
1392 xsnprintf (buf, sizeof (buf), "%c", c);
1396 while (c != '\n' && (c = *iter++) != '\0');
1400 if (lines.back () != '\n')
1404 /* Show source lines from the file of symtab S, starting with line
1405 number LINE and stopping before line number STOPLINE. If this is
1406 not the command line version, then the source is shown in the source
1407 window otherwise it is simply printed. */
1410 print_source_lines (struct symtab *s, int line, int stopline,
1411 print_source_lines_flags flags)
1413 print_source_lines_base (s, line, stopline, flags);
1416 /* Print info on range of pc's in a specified line. */
1419 info_line_command (const char *arg, int from_tty)
1421 CORE_ADDR start_pc, end_pc;
1423 std::vector<symtab_and_line> decoded_sals;
1424 symtab_and_line curr_sal;
1425 gdb::array_view<symtab_and_line> sals;
1429 curr_sal.symtab = current_source_symtab;
1430 curr_sal.pspace = current_program_space;
1431 if (last_line_listed != 0)
1432 curr_sal.line = last_line_listed;
1434 curr_sal.line = current_source_line;
1440 decoded_sals = decode_line_with_last_displayed (arg,
1441 DECODE_LINE_LIST_MODE);
1442 sals = decoded_sals;
1447 /* C++ More than one line may have been specified, as when the user
1448 specifies an overloaded function name. Print info on them all. */
1449 for (const auto &sal : sals)
1451 if (sal.pspace != current_program_space)
1454 if (sal.symtab == 0)
1456 struct gdbarch *gdbarch = get_current_arch ();
1458 printf_filtered (_("No line number information available"));
1461 /* This is useful for "info line *0x7f34". If we can't tell the
1462 user about a source line, at least let them have the symbolic
1464 printf_filtered (" for address ");
1466 print_address (gdbarch, sal.pc, gdb_stdout);
1469 printf_filtered (".");
1470 printf_filtered ("\n");
1472 else if (sal.line > 0
1473 && find_line_pc_range (sal, &start_pc, &end_pc))
1475 struct gdbarch *gdbarch
1476 = get_objfile_arch (SYMTAB_OBJFILE (sal.symtab));
1478 if (start_pc == end_pc)
1480 printf_filtered ("Line %d of \"%s\"",
1482 symtab_to_filename_for_display (sal.symtab));
1484 printf_filtered (" is at address ");
1485 print_address (gdbarch, start_pc, gdb_stdout);
1487 printf_filtered (" but contains no code.\n");
1491 printf_filtered ("Line %d of \"%s\"",
1493 symtab_to_filename_for_display (sal.symtab));
1495 printf_filtered (" starts at address ");
1496 print_address (gdbarch, start_pc, gdb_stdout);
1498 printf_filtered (" and ends at ");
1499 print_address (gdbarch, end_pc, gdb_stdout);
1500 printf_filtered (".\n");
1503 /* x/i should display this line's code. */
1504 set_next_address (gdbarch, start_pc);
1506 /* Repeating "info line" should do the following line. */
1507 last_line_listed = sal.line + 1;
1509 /* If this is the only line, show the source code. If it could
1510 not find the file, don't do anything special. */
1511 if (annotation_level && sals.size () == 1)
1512 identify_source_line (sal.symtab, sal.line, 0, start_pc);
1515 /* Is there any case in which we get here, and have an address
1516 which the user would want to see? If we have debugging symbols
1517 and no line numbers? */
1518 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1519 sal.line, symtab_to_filename_for_display (sal.symtab));
1523 /* Commands to search the source file for a regexp. */
1525 /* Helper for forward_search_command/reverse_search_command. FORWARD
1526 indicates direction: true for forward, false for
1527 backward/reverse. */
1530 search_command_helper (const char *regex, int from_tty, bool forward)
1532 const char *msg = re_comp (regex);
1534 error (("%s"), msg);
1536 if (current_source_symtab == 0)
1537 select_source_symtab (0);
1539 scoped_fd desc = open_source_file (current_source_symtab);
1540 if (desc.get () < 0)
1541 perror_with_name (symtab_to_filename_for_display (current_source_symtab));
1543 if (current_source_symtab->line_charpos == 0)
1544 find_source_lines (current_source_symtab, desc.get ());
1547 ? last_line_listed + 1
1548 : last_line_listed - 1);
1550 if (line < 1 || line > current_source_symtab->nlines)
1551 error (_("Expression not found"));
1553 if (lseek (desc.get (), current_source_symtab->line_charpos[line - 1], 0)
1555 perror_with_name (symtab_to_filename_for_display (current_source_symtab));
1557 gdb_file_up stream = desc.to_file (FDOPEN_MODE);
1558 clearerr (stream.get ());
1560 gdb::def_vector<char> buf;
1567 int c = fgetc (stream.get ());
1574 while (c != '\n' && (c = fgetc (stream.get ())) >= 0);
1576 /* Remove the \r, if any, at the end of the line, otherwise
1577 regular expressions that end with $ or \n won't work. */
1578 size_t sz = buf.size ();
1579 if (sz >= 2 && buf[sz - 2] == '\r')
1582 buf.resize (sz - 1);
1585 /* We now have a source line in buf, null terminate and match. */
1586 buf.push_back ('\0');
1587 if (re_exec (buf.data ()) > 0)
1590 print_source_lines (current_source_symtab, line, line + 1, 0);
1591 set_internalvar_integer (lookup_internalvar ("_"), line);
1592 current_source_line = std::max (line - lines_to_list / 2, 1);
1603 if (fseek (stream.get (),
1604 current_source_symtab->line_charpos[line - 1], 0) < 0)
1606 const char *filename
1607 = symtab_to_filename_for_display (current_source_symtab);
1608 perror_with_name (filename);
1613 printf_filtered (_("Expression not found\n"));
1617 forward_search_command (const char *regex, int from_tty)
1619 search_command_helper (regex, from_tty, true);
1623 reverse_search_command (const char *regex, int from_tty)
1625 search_command_helper (regex, from_tty, false);
1628 /* If the last character of PATH is a directory separator, then strip it. */
1631 strip_trailing_directory_separator (char *path)
1633 const int last = strlen (path) - 1;
1636 return; /* No stripping is needed if PATH is the empty string. */
1638 if (IS_DIR_SEPARATOR (path[last]))
1642 /* Return the path substitution rule that matches FROM.
1643 Return NULL if no rule matches. */
1645 static struct substitute_path_rule *
1646 find_substitute_path_rule (const char *from)
1648 struct substitute_path_rule *rule = substitute_path_rules;
1650 while (rule != NULL)
1652 if (FILENAME_CMP (rule->from, from) == 0)
1660 /* Add a new substitute-path rule at the end of the current list of rules.
1661 The new rule will replace FROM into TO. */
1664 add_substitute_path_rule (char *from, char *to)
1666 struct substitute_path_rule *rule;
1667 struct substitute_path_rule *new_rule = XNEW (struct substitute_path_rule);
1669 new_rule->from = xstrdup (from);
1670 new_rule->to = xstrdup (to);
1671 new_rule->next = NULL;
1673 /* If the list of rules are empty, then insert the new rule
1674 at the head of the list. */
1676 if (substitute_path_rules == NULL)
1678 substitute_path_rules = new_rule;
1682 /* Otherwise, skip to the last rule in our list and then append
1685 rule = substitute_path_rules;
1686 while (rule->next != NULL)
1689 rule->next = new_rule;
1692 /* Remove the given source path substitution rule from the current list
1693 of rules. The memory allocated for that rule is also deallocated. */
1696 delete_substitute_path_rule (struct substitute_path_rule *rule)
1698 if (rule == substitute_path_rules)
1699 substitute_path_rules = rule->next;
1702 struct substitute_path_rule *prev = substitute_path_rules;
1704 while (prev != NULL && prev->next != rule)
1707 gdb_assert (prev != NULL);
1709 prev->next = rule->next;
1717 /* Implement the "show substitute-path" command. */
1720 show_substitute_path_command (const char *args, int from_tty)
1722 struct substitute_path_rule *rule = substitute_path_rules;
1725 gdb_argv argv (args);
1727 /* We expect zero or one argument. */
1729 if (argv != NULL && argv[0] != NULL && argv[1] != NULL)
1730 error (_("Too many arguments in command"));
1732 if (argv != NULL && argv[0] != NULL)
1735 /* Print the substitution rules. */
1739 (_("Source path substitution rule matching `%s':\n"), from);
1741 printf_filtered (_("List of all source path substitution rules:\n"));
1743 while (rule != NULL)
1745 if (from == NULL || substitute_path_rule_matches (rule, from) != 0)
1746 printf_filtered (" `%s' -> `%s'.\n", rule->from, rule->to);
1751 /* Implement the "unset substitute-path" command. */
1754 unset_substitute_path_command (const char *args, int from_tty)
1756 struct substitute_path_rule *rule = substitute_path_rules;
1757 gdb_argv argv (args);
1761 /* This function takes either 0 or 1 argument. */
1763 if (argv != NULL && argv[0] != NULL && argv[1] != NULL)
1764 error (_("Incorrect usage, too many arguments in command"));
1766 if (argv != NULL && argv[0] != NULL)
1769 /* If the user asked for all the rules to be deleted, ask him
1770 to confirm and give him a chance to abort before the action
1774 && !query (_("Delete all source path substitution rules? ")))
1775 error (_("Canceled"));
1777 /* Delete the rule matching the argument. No argument means that
1778 all rules should be deleted. */
1780 while (rule != NULL)
1782 struct substitute_path_rule *next = rule->next;
1784 if (from == NULL || FILENAME_CMP (from, rule->from) == 0)
1786 delete_substitute_path_rule (rule);
1793 /* If the user asked for a specific rule to be deleted but
1794 we could not find it, then report an error. */
1796 if (from != NULL && !rule_found)
1797 error (_("No substitution rule defined for `%s'"), from);
1799 forget_cached_source_info ();
1802 /* Add a new source path substitution rule. */
1805 set_substitute_path_command (const char *args, int from_tty)
1807 struct substitute_path_rule *rule;
1809 gdb_argv argv (args);
1811 if (argv == NULL || argv[0] == NULL || argv [1] == NULL)
1812 error (_("Incorrect usage, too few arguments in command"));
1814 if (argv[2] != NULL)
1815 error (_("Incorrect usage, too many arguments in command"));
1817 if (*(argv[0]) == '\0')
1818 error (_("First argument must be at least one character long"));
1820 /* Strip any trailing directory separator character in either FROM
1821 or TO. The substitution rule already implicitly contains them. */
1822 strip_trailing_directory_separator (argv[0]);
1823 strip_trailing_directory_separator (argv[1]);
1825 /* If a rule with the same "from" was previously defined, then
1826 delete it. This new rule replaces it. */
1828 rule = find_substitute_path_rule (argv[0]);
1830 delete_substitute_path_rule (rule);
1832 /* Insert the new substitution rule. */
1834 add_substitute_path_rule (argv[0], argv[1]);
1835 forget_cached_source_info ();
1840 _initialize_source (void)
1842 struct cmd_list_element *c;
1844 current_source_symtab = 0;
1845 init_source_path ();
1847 /* The intention is to use POSIX Basic Regular Expressions.
1848 Always use the GNU regex routine for consistency across all hosts.
1849 Our current GNU regex.c does not have all the POSIX features, so this is
1850 just an approximation. */
1851 re_set_syntax (RE_SYNTAX_GREP);
1853 c = add_cmd ("directory", class_files, directory_command, _("\
1854 Add directory DIR to beginning of search path for source files.\n\
1855 Forget cached info on source file locations and line positions.\n\
1856 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1857 directory in which the source file was compiled into object code.\n\
1858 With no argument, reset the search path to $cdir:$cwd, the default."),
1862 add_com_alias ("use", "directory", class_files, 0);
1864 set_cmd_completer (c, filename_completer);
1866 add_setshow_optional_filename_cmd ("directories",
1870 Set the search path for finding source files."),
1872 Show the search path for finding source files."),
1874 $cwd in the path means the current working directory.\n\
1875 $cdir in the path means the compilation directory of the source file.\n\
1876 GDB ensures the search path always ends with $cdir:$cwd by\n\
1877 appending these directories if necessary.\n\
1878 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1879 set_directories_command,
1880 show_directories_command,
1881 &setlist, &showlist);
1883 add_info ("source", info_source_command,
1884 _("Information about the current source file."));
1886 add_info ("line", info_line_command, _("\
1887 Core addresses of the code for a source line.\n\
1888 Line can be specified as\n\
1889 LINENUM, to list around that line in current file,\n\
1890 FILE:LINENUM, to list around that line in that file,\n\
1891 FUNCTION, to list around beginning of that function,\n\
1892 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1893 Default is to describe the last source line that was listed.\n\n\
1894 This sets the default address for \"x\" to the line's first instruction\n\
1895 so that \"x/i\" suffices to start examining the machine code.\n\
1896 The address is also stored as the value of \"$_\"."));
1898 add_com ("forward-search", class_files, forward_search_command, _("\
1899 Search for regular expression (see regex(3)) from last line listed.\n\
1900 The matching line number is also stored as the value of \"$_\"."));
1901 add_com_alias ("search", "forward-search", class_files, 0);
1902 add_com_alias ("fo", "forward-search", class_files, 1);
1904 add_com ("reverse-search", class_files, reverse_search_command, _("\
1905 Search backward for regular expression (see regex(3)) from last line listed.\n\
1906 The matching line number is also stored as the value of \"$_\"."));
1907 add_com_alias ("rev", "reverse-search", class_files, 1);
1909 add_setshow_integer_cmd ("listsize", class_support, &lines_to_list, _("\
1910 Set number of source lines gdb will list by default."), _("\
1911 Show number of source lines gdb will list by default."), _("\
1912 Use this to choose how many source lines the \"list\" displays (unless\n\
1913 the \"list\" argument explicitly specifies some other number).\n\
1914 A value of \"unlimited\", or zero, means there's no limit."),
1917 &setlist, &showlist);
1919 add_cmd ("substitute-path", class_files, set_substitute_path_command,
1921 Usage: set substitute-path FROM TO\n\
1922 Add a substitution rule replacing FROM into TO in source file names.\n\
1923 If a substitution rule was previously set for FROM, the old rule\n\
1924 is replaced by the new one."),
1927 add_cmd ("substitute-path", class_files, unset_substitute_path_command,
1929 Usage: unset substitute-path [FROM]\n\
1930 Delete the rule for substituting FROM in source file names. If FROM\n\
1931 is not specified, all substituting rules are deleted.\n\
1932 If the debugger cannot find a rule for FROM, it will display a warning."),
1935 add_cmd ("substitute-path", class_files, show_substitute_path_command,
1937 Usage: show substitute-path [FROM]\n\
1938 Print the rule for substituting FROM in source file names. If FROM\n\
1939 is not specified, print all substitution rules."),
1942 add_setshow_enum_cmd ("filename-display", class_files,
1943 filename_display_kind_names,
1944 &filename_display_string, _("\
1945 Set how to display filenames."), _("\
1946 Show how to display filenames."), _("\
1947 filename-display can be:\n\
1948 basename - display only basename of a filename\n\
1949 relative - display a filename relative to the compilation directory\n\
1950 absolute - display an absolute filename\n\
1951 By default, relative filenames are displayed."),
1953 show_filename_display_string,
1954 &setlist, &showlist);