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 "gdbsupport/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 "gdbsupport/enum-flags.h"
45 #include "gdbsupport/scoped_fd.h"
47 #include "gdbsupport/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;
239 select_source_symtab (struct symtab
*s
)
243 current_source_symtab
= s
;
244 current_source_line
= 1;
245 current_source_pspace
= SYMTAB_PSPACE (s
);
249 if (current_source_symtab
)
252 /* Make the default place to list be the function `main'
254 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0).symbol
)
256 std::vector
<symtab_and_line
> sals
257 = decode_line_with_current_source (main_name (),
258 DECODE_LINE_FUNFIRSTLINE
);
259 const symtab_and_line
&sal
= sals
[0];
260 current_source_pspace
= sal
.pspace
;
261 current_source_symtab
= sal
.symtab
;
262 current_source_line
= std::max (sal
.line
- (lines_to_list
- 1), 1);
263 if (current_source_symtab
)
267 /* Alright; find the last file in the symtab list (ignoring .h's
268 and namespace symtabs). */
270 current_source_line
= 1;
272 for (objfile
*ofp
: current_program_space
->objfiles ())
274 for (compunit_symtab
*cu
: ofp
->compunits ())
276 for (symtab
*symtab
: compunit_filetabs (cu
))
278 const char *name
= symtab
->filename
;
279 int len
= strlen (name
);
281 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
282 || strcmp (name
, "<<C++-namespaces>>") == 0)))
284 current_source_pspace
= current_program_space
;
285 current_source_symtab
= symtab
;
291 if (current_source_symtab
)
294 for (objfile
*objfile
: current_program_space
->objfiles ())
297 s
= objfile
->sf
->qf
->find_last_source_symtab (objfile
);
299 current_source_symtab
= s
;
301 if (current_source_symtab
)
304 error (_("Can't find a default source file"));
307 /* Handler for "set directories path-list" command.
308 "set dir mumble" doesn't prepend paths, it resets the entire
309 path list. The theory is that set(show(dir)) should be a no-op. */
312 set_directories_command (const char *args
,
313 int from_tty
, struct cmd_list_element
*c
)
315 /* This is the value that was set.
316 It needs to be processed to maintain $cdir:$cwd and remove dups. */
317 char *set_path
= source_path
;
319 /* We preserve the invariant that $cdir:$cwd begins life at the end of
320 the list by calling init_source_path. If they appear earlier in
321 SET_PATH then mod_path will move them appropriately.
322 mod_path will also remove duplicates. */
324 if (*set_path
!= '\0')
325 mod_path (set_path
, &source_path
);
330 /* Print the list of source directories.
331 This is used by the "ld" command, so it has the signature of a command
335 show_directories_1 (char *ignore
, int from_tty
)
337 puts_filtered ("Source directories searched: ");
338 puts_filtered (source_path
);
339 puts_filtered ("\n");
342 /* Handler for "show directories" command. */
345 show_directories_command (struct ui_file
*file
, int from_tty
,
346 struct cmd_list_element
*c
, const char *value
)
348 show_directories_1 (NULL
, from_tty
);
354 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
356 for (compunit_symtab
*cu
: objfile
->compunits ())
358 for (symtab
*s
: compunit_filetabs (cu
))
360 if (s
->fullname
!= NULL
)
369 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
375 forget_cached_source_info (void)
377 struct program_space
*pspace
;
380 for (objfile
*objfile
: pspace
->objfiles ())
382 forget_cached_source_info_for_objfile (objfile
);
385 g_source_cache
.clear ();
386 last_source_visited
= NULL
;
390 init_source_path (void)
394 xsnprintf (buf
, sizeof (buf
), "$cdir%c$cwd", DIRNAME_SEPARATOR
);
395 source_path
= xstrdup (buf
);
396 forget_cached_source_info ();
399 /* Add zero or more directories to the front of the source path. */
402 directory_command (const char *dirname
, int from_tty
)
405 /* FIXME, this goes to "delete dir"... */
408 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
416 mod_path (dirname
, &source_path
);
417 forget_cached_source_info ();
420 show_directories_1 ((char *) 0, from_tty
);
423 /* Add a path given with the -d command line switch.
424 This will not be quoted so we must not treat spaces as separators. */
427 directory_switch (const char *dirname
, int from_tty
)
429 add_path (dirname
, &source_path
, 0);
432 /* Add zero or more directories to the front of an arbitrary path. */
435 mod_path (const char *dirname
, char **which_path
)
437 add_path (dirname
, which_path
, 1);
440 /* Workhorse of mod_path. Takes an extra argument to determine
441 if dirname should be parsed for separators that indicate multiple
442 directories. This allows for interfaces that pre-parse the dirname
443 and allow specification of traditional separator characters such
447 add_path (const char *dirname
, char **which_path
, int parse_separators
)
449 char *old
= *which_path
;
451 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
456 if (parse_separators
)
458 /* This will properly parse the space and tab separators
459 and any quotes that may exist. */
460 gdb_argv
argv (dirname
);
462 for (char *arg
: argv
)
463 dirnames_to_char_ptr_vec_append (&dir_vec
, arg
);
466 dir_vec
.emplace_back (xstrdup (dirname
));
468 for (const gdb::unique_xmalloc_ptr
<char> &name_up
: dir_vec
)
470 char *name
= name_up
.get ();
473 gdb::unique_xmalloc_ptr
<char> new_name_holder
;
475 /* Spaces and tabs will have been removed by buildargv().
476 NAME is the start of the directory.
477 P is the '\0' following the end. */
478 p
= name
+ strlen (name
);
480 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
481 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
482 /* On MS-DOS and MS-Windows, h:\ is different from h: */
483 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
485 && IS_DIR_SEPARATOR (p
[-1]))
486 /* Sigh. "foo/" => "foo" */
490 while (p
> name
&& p
[-1] == '.')
494 /* "." => getwd (). */
495 name
= current_directory
;
498 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
508 /* "...foo/." => "...foo". */
519 new_name_holder
.reset (tilde_expand (name
));
520 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
521 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
522 new_name_holder
.reset (concat (name
, ".", (char *) NULL
));
524 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
525 new_name_holder
.reset (concat (current_directory
, SLASH_STRING
, name
,
528 new_name_holder
.reset (savestring (name
, p
- name
));
529 name
= new_name_holder
.get ();
531 /* Unless it's a variable, check existence. */
534 /* These are warnings, not errors, since we don't want a
535 non-existent directory in a .gdbinit file to stop processing
536 of the .gdbinit file.
538 Whether they get added to the path is more debatable. Current
539 answer is yes, in case the user wants to go make the directory
540 or whatever. If the directory continues to not exist/not be
541 a directory/etc, then having them in the path should be
543 if (stat (name
, &st
) < 0)
545 int save_errno
= errno
;
547 fprintf_unfiltered (gdb_stderr
, "Warning: ");
548 print_sys_errmsg (name
, save_errno
);
550 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
551 warning (_("%s is not a directory."), name
);
556 unsigned int len
= strlen (name
);
562 /* FIXME: we should use realpath() or its work-alike
563 before comparing. Then all the code above which
564 removes excess slashes and dots could simply go away. */
565 if (!filename_ncmp (p
, name
, len
)
566 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
568 /* Found it in the search path, remove old copy. */
571 /* Back over leading separator. */
574 if (prefix
> p
- *which_path
)
576 /* Same dir twice in one cmd. */
579 /* Copy from next '\0' or ':'. */
580 memmove (p
, &p
[len
+ 1], strlen (&p
[len
+ 1]) + 1);
582 p
= strchr (p
, DIRNAME_SEPARATOR
);
589 tinybuf
[0] = DIRNAME_SEPARATOR
;
592 /* If we have already tacked on a name(s) in this command,
593 be sure they stay on the front as we tack on some
601 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
603 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
604 prefix
= strlen (temp
);
609 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
611 prefix
= strlen (name
);
623 info_source_command (const char *ignore
, int from_tty
)
625 struct symtab
*s
= current_source_symtab
;
626 struct compunit_symtab
*cust
;
630 printf_filtered (_("No current source file.\n"));
634 cust
= SYMTAB_COMPUNIT (s
);
635 printf_filtered (_("Current source file is %s\n"), s
->filename
);
636 if (SYMTAB_DIRNAME (s
) != NULL
)
637 printf_filtered (_("Compilation directory is %s\n"), SYMTAB_DIRNAME (s
));
639 printf_filtered (_("Located in %s\n"), s
->fullname
);
640 const std::vector
<off_t
> *offsets
;
641 if (g_source_cache
.get_line_charpos (s
, &offsets
))
642 printf_filtered (_("Contains %d line%s.\n"), (int) offsets
->size (),
643 offsets
->size () == 1 ? "" : "s");
645 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
646 printf_filtered (_("Producer is %s.\n"),
647 COMPUNIT_PRODUCER (cust
) != NULL
648 ? COMPUNIT_PRODUCER (cust
) : _("unknown"));
649 printf_filtered (_("Compiled with %s debugging format.\n"),
650 COMPUNIT_DEBUGFORMAT (cust
));
651 printf_filtered (_("%s preprocessor macro info.\n"),
652 COMPUNIT_MACRO_TABLE (cust
) != NULL
653 ? "Includes" : "Does not include");
657 /* Open a file named STRING, searching path PATH (dir names sep by some char)
658 using mode MODE in the calls to open. You cannot use this function to
659 create files (O_CREAT).
661 OPTS specifies the function behaviour in specific cases.
663 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
664 (ie pretend the first element of PATH is "."). This also indicates
665 that, unless OPF_SEARCH_IN_PATH is also specified, a slash in STRING
666 disables searching of the path (this is so that "exec-file ./foo" or
667 "symbol-file ./foo" insures that you get that particular version of
668 foo or an error message).
670 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
671 searched in path (we usually want this for source files but not for
674 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
675 the actual file opened (this string will always start with a "/"). We
676 have to take special pains to avoid doubling the "/" between the directory
677 and the file, sigh! Emacs gets confuzzed by this when we print the
680 If OPTS has OPF_RETURN_REALPATH set return FILENAME_OPENED resolved by
681 gdb_realpath. Even without OPF_RETURN_REALPATH this function still returns
682 filename starting with "/". If FILENAME_OPENED is NULL this option has no
685 If a file is found, return the descriptor.
686 Otherwise, return -1, with errno set for the last name we tried to open. */
688 /* >>>> This should only allow files of certain types,
689 >>>> eg executable, non-directory. */
691 openp (const char *path
, openp_flags opts
, const char *string
,
692 int mode
, gdb::unique_xmalloc_ptr
<char> *filename_opened
)
697 /* The errno set for the last name we tried to open (and
700 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
702 /* The open syscall MODE parameter is not specified. */
703 gdb_assert ((mode
& O_CREAT
) == 0);
704 gdb_assert (string
!= NULL
);
706 /* A file with an empty name cannot possibly exist. Report a failure
707 without further checking.
709 This is an optimization which also defends us against buggy
710 implementations of the "stat" function. For instance, we have
711 noticed that a MinGW debugger built on Windows XP 32bits crashes
712 when the debugger is started with an empty argument. */
713 if (string
[0] == '\0')
724 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
726 int i
, reg_file_errno
;
728 if (is_regular_file (string
, ®_file_errno
))
730 filename
= (char *) alloca (strlen (string
) + 1);
731 strcpy (filename
, string
);
732 fd
= gdb_open_cloexec (filename
, mode
, 0);
741 last_errno
= reg_file_errno
;
744 if (!(opts
& OPF_SEARCH_IN_PATH
))
745 for (i
= 0; string
[i
]; i
++)
746 if (IS_DIR_SEPARATOR (string
[i
]))
750 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
751 if (HAS_DRIVE_SPEC (string
))
752 string
= STRIP_DRIVE_SPEC (string
);
754 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
755 while (IS_DIR_SEPARATOR(string
[0]))
759 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
762 alloclen
= strlen (path
) + strlen (string
) + 2;
763 filename
= (char *) alloca (alloclen
);
767 dir_vec
= dirnames_to_char_ptr_vec (path
);
769 for (const gdb::unique_xmalloc_ptr
<char> &dir_up
: dir_vec
)
771 char *dir
= dir_up
.get ();
772 size_t len
= strlen (dir
);
775 if (strcmp (dir
, "$cwd") == 0)
777 /* Name is $cwd -- insert current directory name instead. */
780 /* First, realloc the filename buffer if too short. */
781 len
= strlen (current_directory
);
782 newlen
= len
+ strlen (string
) + 2;
783 if (newlen
> alloclen
)
786 filename
= (char *) alloca (alloclen
);
788 strcpy (filename
, current_directory
);
790 else if (strchr(dir
, '~'))
792 /* See whether we need to expand the tilde. */
795 gdb::unique_xmalloc_ptr
<char> tilde_expanded (tilde_expand (dir
));
797 /* First, realloc the filename buffer if too short. */
798 len
= strlen (tilde_expanded
.get ());
799 newlen
= len
+ strlen (string
) + 2;
800 if (newlen
> alloclen
)
803 filename
= (char *) alloca (alloclen
);
805 strcpy (filename
, tilde_expanded
.get ());
809 /* Normal file name in path -- just use it. */
810 strcpy (filename
, dir
);
812 /* Don't search $cdir. It's also a magic path like $cwd, but we
813 don't have enough information to expand it. The user *could*
814 have an actual directory named '$cdir' but handling that would
815 be confusing, it would mean different things in different
816 contexts. If the user really has '$cdir' one can use './$cdir'.
817 We can get $cdir when loading scripts. When loading source files
818 $cdir must have already been expanded to the correct value. */
819 if (strcmp (dir
, "$cdir") == 0)
823 /* Remove trailing slashes. */
824 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
827 strcat (filename
+ len
, SLASH_STRING
);
828 strcat (filename
, string
);
830 if (is_regular_file (filename
, ®_file_errno
))
832 fd
= gdb_open_cloexec (filename
, mode
, 0);
838 last_errno
= reg_file_errno
;
844 /* If a file was opened, canonicalize its filename. */
846 filename_opened
->reset (NULL
);
847 else if ((opts
& OPF_RETURN_REALPATH
) != 0)
848 *filename_opened
= gdb_realpath (filename
);
850 *filename_opened
= gdb_abspath (filename
);
858 /* This is essentially a convenience, for clients that want the behaviour
859 of openp, using source_path, but that really don't want the file to be
860 opened but want instead just to know what the full pathname is (as
861 qualified against source_path).
863 The current working directory is searched first.
865 If the file was found, this function returns 1, and FULL_PATHNAME is
866 set to the fully-qualified pathname.
868 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
870 source_full_path_of (const char *filename
,
871 gdb::unique_xmalloc_ptr
<char> *full_pathname
)
875 fd
= openp (source_path
,
876 OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
,
877 filename
, O_RDONLY
, full_pathname
);
880 full_pathname
->reset (NULL
);
888 /* Return non-zero if RULE matches PATH, that is if the rule can be
892 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
895 const int from_len
= strlen (rule
->from
);
896 const int path_len
= strlen (path
);
898 if (path_len
< from_len
)
901 /* The substitution rules are anchored at the start of the path,
902 so the path should start with rule->from. */
904 if (filename_ncmp (path
, rule
->from
, from_len
) != 0)
907 /* Make sure that the region in the path that matches the substitution
908 rule is immediately followed by a directory separator (or the end of
909 string character). */
911 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
917 /* Find the substitute-path rule that applies to PATH and return it.
918 Return NULL if no rule applies. */
920 static struct substitute_path_rule
*
921 get_substitute_path_rule (const char *path
)
923 struct substitute_path_rule
*rule
= substitute_path_rules
;
925 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
931 /* If the user specified a source path substitution rule that applies
932 to PATH, then apply it and return the new path.
934 Return NULL if no substitution rule was specified by the user,
935 or if no rule applied to the given PATH. */
937 gdb::unique_xmalloc_ptr
<char>
938 rewrite_source_path (const char *path
)
940 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
947 from_len
= strlen (rule
->from
);
949 /* Compute the rewritten path and return it. */
952 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
953 strcpy (new_path
, rule
->to
);
954 strcat (new_path
, path
+ from_len
);
956 return gdb::unique_xmalloc_ptr
<char> (new_path
);
962 find_and_open_source (const char *filename
,
964 gdb::unique_xmalloc_ptr
<char> *fullname
)
966 char *path
= source_path
;
970 /* Quick way out if we already know its full name. */
974 /* The user may have requested that source paths be rewritten
975 according to substitution rules he provided. If a substitution
976 rule applies to this path, then apply it. */
977 gdb::unique_xmalloc_ptr
<char> rewritten_fullname
978 = rewrite_source_path (fullname
->get ());
980 if (rewritten_fullname
!= NULL
)
981 *fullname
= std::move (rewritten_fullname
);
983 result
= gdb_open_cloexec (fullname
->get (), OPEN_MODE
, 0);
986 if (basenames_may_differ
)
987 *fullname
= gdb_realpath (fullname
->get ());
989 *fullname
= gdb_abspath (fullname
->get ());
990 return scoped_fd (result
);
993 /* Didn't work -- free old one, try again. */
994 fullname
->reset (NULL
);
997 gdb::unique_xmalloc_ptr
<char> rewritten_dirname
;
1000 /* If necessary, rewrite the compilation directory name according
1001 to the source path substitution rules specified by the user. */
1003 rewritten_dirname
= rewrite_source_path (dirname
);
1005 if (rewritten_dirname
!= NULL
)
1006 dirname
= rewritten_dirname
.get ();
1008 /* Replace a path entry of $cdir with the compilation directory
1011 p
= strstr (source_path
, "$cdir");
1012 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1013 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1018 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1019 len
= p
- source_path
;
1020 strncpy (path
, source_path
, len
); /* Before $cdir */
1021 strcpy (path
+ len
, dirname
); /* new stuff */
1022 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1027 gdb::unique_xmalloc_ptr
<char> rewritten_filename
1028 = rewrite_source_path (filename
);
1030 if (rewritten_filename
!= NULL
)
1031 filename
= rewritten_filename
.get ();
1033 openp_flags flags
= OPF_SEARCH_IN_PATH
;
1034 if (basenames_may_differ
)
1035 flags
|= OPF_RETURN_REALPATH
;
1036 result
= openp (path
, flags
, filename
, OPEN_MODE
, fullname
);
1039 /* Didn't work. Try using just the basename. */
1040 p
= lbasename (filename
);
1042 result
= openp (path
, flags
, p
, OPEN_MODE
, fullname
);
1045 return scoped_fd (result
);
1048 /* Open a source file given a symtab S. Returns a file descriptor or
1049 negative number for error.
1051 This function is a convience function to find_and_open_source. */
1054 open_source_file (struct symtab
*s
)
1057 return scoped_fd (-1);
1059 gdb::unique_xmalloc_ptr
<char> fullname (s
->fullname
);
1061 scoped_fd fd
= find_and_open_source (s
->filename
, SYMTAB_DIRNAME (s
),
1063 s
->fullname
= fullname
.release ();
1067 /* Finds the fullname that a symtab represents.
1069 This functions finds the fullname and saves it in s->fullname.
1070 It will also return the value.
1072 If this function fails to find the file that this symtab represents,
1073 the expected fullname is used. Therefore the files does not have to
1077 symtab_to_fullname (struct symtab
*s
)
1079 /* Use cached copy if we have it.
1080 We rely on forget_cached_source_info being called appropriately
1081 to handle cases like the file being moved. */
1082 if (s
->fullname
== NULL
)
1084 scoped_fd fd
= open_source_file (s
);
1088 gdb::unique_xmalloc_ptr
<char> fullname
;
1090 /* rewrite_source_path would be applied by find_and_open_source, we
1091 should report the pathname where GDB tried to find the file. */
1093 if (SYMTAB_DIRNAME (s
) == NULL
|| IS_ABSOLUTE_PATH (s
->filename
))
1094 fullname
.reset (xstrdup (s
->filename
));
1096 fullname
.reset (concat (SYMTAB_DIRNAME (s
), SLASH_STRING
,
1097 s
->filename
, (char *) NULL
));
1099 s
->fullname
= rewrite_source_path (fullname
.get ()).release ();
1100 if (s
->fullname
== NULL
)
1101 s
->fullname
= fullname
.release ();
1108 /* See commentary in source.h. */
1111 symtab_to_filename_for_display (struct symtab
*symtab
)
1113 if (filename_display_string
== filename_display_basename
)
1114 return lbasename (symtab
->filename
);
1115 else if (filename_display_string
== filename_display_absolute
)
1116 return symtab_to_fullname (symtab
);
1117 else if (filename_display_string
== filename_display_relative
)
1118 return symtab
->filename
;
1120 internal_error (__FILE__
, __LINE__
, _("invalid filename_display_string"));
1125 /* Print source lines from the file of symtab S,
1126 starting with line number LINE and stopping before line number STOPLINE. */
1129 print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1130 print_source_lines_flags flags
)
1134 int nlines
= stopline
- line
;
1135 struct ui_out
*uiout
= current_uiout
;
1137 /* Regardless of whether we can open the file, set current_source_symtab. */
1138 current_source_symtab
= s
;
1139 current_source_line
= line
;
1140 first_line_listed
= line
;
1142 /* If printing of source lines is disabled, just print file and line
1144 if (uiout
->test_flags (ui_source_list
))
1146 /* Only prints "No such file or directory" once. */
1147 if ((s
!= last_source_visited
) || (!last_source_error
))
1149 last_source_visited
= s
;
1150 desc
= open_source_file (s
);
1151 if (desc
.get () < 0)
1153 last_source_error
= desc
.get ();
1159 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1165 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1171 if (!(flags
& PRINT_SOURCE_LINES_NOERROR
))
1173 const char *filename
= symtab_to_filename_for_display (s
);
1174 int len
= strlen (filename
) + 100;
1175 char *name
= (char *) alloca (len
);
1177 xsnprintf (name
, len
, "%d\t%s", line
, filename
);
1178 print_sys_errmsg (name
, errno
);
1182 uiout
->field_signed ("line", line
);
1183 uiout
->text ("\tin ");
1185 /* CLI expects only the "file" field. TUI expects only the
1186 "fullname" field (and TUI does break if "file" is printed).
1187 MI expects both fields. ui_source_list is set only for CLI,
1189 if (uiout
->is_mi_like_p () || uiout
->test_flags (ui_source_list
))
1190 uiout
->field_string ("file", symtab_to_filename_for_display (s
),
1191 ui_out_style_kind::FILE);
1192 if (uiout
->is_mi_like_p () || !uiout
->test_flags (ui_source_list
))
1194 const char *s_fullname
= symtab_to_fullname (s
);
1195 char *local_fullname
;
1197 /* ui_out_field_string may free S_FULLNAME by calling
1198 open_source_file for it again. See e.g.,
1199 tui_field_string->tui_show_source. */
1200 local_fullname
= (char *) alloca (strlen (s_fullname
) + 1);
1201 strcpy (local_fullname
, s_fullname
);
1203 uiout
->field_string ("fullname", local_fullname
);
1212 last_source_error
= 0;
1214 /* If the user requested a sequence of lines that seems to go backward
1215 (from high to low line numbers) then we don't print anything. */
1216 if (stopline
<= line
)
1220 if (!g_source_cache
.get_source_lines (s
, line
, stopline
- 1, &lines
))
1222 const std::vector
<off_t
> *offsets
= nullptr;
1223 g_source_cache
.get_line_charpos (s
, &offsets
);
1224 error (_("Line number %d out of range; %s has %d lines."),
1225 line
, symtab_to_filename_for_display (s
),
1226 offsets
== nullptr ? 0 : (int) offsets
->size ());
1229 const char *iter
= lines
.c_str ();
1230 while (nlines
-- > 0 && *iter
!= '\0')
1234 last_line_listed
= current_source_line
;
1235 if (flags
& PRINT_SOURCE_LINES_FILENAME
)
1237 uiout
->text (symtab_to_filename_for_display (s
));
1240 xsnprintf (buf
, sizeof (buf
), "%d\t", current_source_line
++);
1243 while (*iter
!= '\0')
1245 /* Find a run of characters that can be emitted at once.
1246 This is done so that escape sequences are kept
1248 const char *start
= iter
;
1254 if (c
== '\033' && skip_ansi_escape (iter
, &skip_bytes
))
1256 else if (c
>= 0 && c
< 040 && c
!= '\t')
1265 std::string
text (start
, iter
);
1266 uiout
->text (text
.c_str ());
1270 /* Treat either \r or \r\n as a single newline. */
1276 else if (*iter
== '\n')
1281 else if (*iter
> 0 && *iter
< 040)
1283 xsnprintf (buf
, sizeof (buf
), "^%c", *iter
+ 0100);
1287 else if (*iter
== 0177)
1301 print_source_lines (struct symtab
*s
, int line
, int stopline
,
1302 print_source_lines_flags flags
)
1304 print_source_lines_base (s
, line
, stopline
, flags
);
1310 print_source_lines (struct symtab
*s
, source_lines_range line_range
,
1311 print_source_lines_flags flags
)
1313 print_source_lines_base (s
, line_range
.startline (),
1314 line_range
.stopline (), flags
);
1319 /* Print info on range of pc's in a specified line. */
1322 info_line_command (const char *arg
, int from_tty
)
1324 CORE_ADDR start_pc
, end_pc
;
1326 std::vector
<symtab_and_line
> decoded_sals
;
1327 symtab_and_line curr_sal
;
1328 gdb::array_view
<symtab_and_line
> sals
;
1332 curr_sal
.symtab
= current_source_symtab
;
1333 curr_sal
.pspace
= current_program_space
;
1334 if (last_line_listed
!= 0)
1335 curr_sal
.line
= last_line_listed
;
1337 curr_sal
.line
= current_source_line
;
1343 decoded_sals
= decode_line_with_last_displayed (arg
,
1344 DECODE_LINE_LIST_MODE
);
1345 sals
= decoded_sals
;
1350 /* C++ More than one line may have been specified, as when the user
1351 specifies an overloaded function name. Print info on them all. */
1352 for (const auto &sal
: sals
)
1354 if (sal
.pspace
!= current_program_space
)
1357 if (sal
.symtab
== 0)
1359 struct gdbarch
*gdbarch
= get_current_arch ();
1361 printf_filtered (_("No line number information available"));
1364 /* This is useful for "info line *0x7f34". If we can't tell the
1365 user about a source line, at least let them have the symbolic
1367 printf_filtered (" for address ");
1369 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1372 printf_filtered (".");
1373 printf_filtered ("\n");
1375 else if (sal
.line
> 0
1376 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1378 struct gdbarch
*gdbarch
1379 = get_objfile_arch (SYMTAB_OBJFILE (sal
.symtab
));
1381 if (start_pc
== end_pc
)
1383 printf_filtered ("Line %d of \"%s\"",
1385 symtab_to_filename_for_display (sal
.symtab
));
1387 printf_filtered (" is at address ");
1388 print_address (gdbarch
, start_pc
, gdb_stdout
);
1390 printf_filtered (" but contains no code.\n");
1394 printf_filtered ("Line %d of \"%s\"",
1396 symtab_to_filename_for_display (sal
.symtab
));
1398 printf_filtered (" starts at address ");
1399 print_address (gdbarch
, start_pc
, gdb_stdout
);
1401 printf_filtered (" and ends at ");
1402 print_address (gdbarch
, end_pc
, gdb_stdout
);
1403 printf_filtered (".\n");
1406 /* x/i should display this line's code. */
1407 set_next_address (gdbarch
, start_pc
);
1409 /* Repeating "info line" should do the following line. */
1410 last_line_listed
= sal
.line
+ 1;
1412 /* If this is the only line, show the source code. If it could
1413 not find the file, don't do anything special. */
1414 if (sals
.size () == 1)
1415 annotate_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1418 /* Is there any case in which we get here, and have an address
1419 which the user would want to see? If we have debugging symbols
1420 and no line numbers? */
1421 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1422 sal
.line
, symtab_to_filename_for_display (sal
.symtab
));
1426 /* Commands to search the source file for a regexp. */
1428 /* Helper for forward_search_command/reverse_search_command. FORWARD
1429 indicates direction: true for forward, false for
1430 backward/reverse. */
1433 search_command_helper (const char *regex
, int from_tty
, bool forward
)
1435 const char *msg
= re_comp (regex
);
1437 error (("%s"), msg
);
1439 if (current_source_symtab
== 0)
1440 select_source_symtab (0);
1442 scoped_fd
desc (open_source_file (current_source_symtab
));
1443 if (desc
.get () < 0)
1444 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1447 ? last_line_listed
+ 1
1448 : last_line_listed
- 1);
1450 const std::vector
<off_t
> *offsets
;
1452 || !g_source_cache
.get_line_charpos (current_source_symtab
, &offsets
)
1453 || line
> offsets
->size ())
1454 error (_("Expression not found"));
1456 if (lseek (desc
.get (), (*offsets
)[line
- 1], 0) < 0)
1457 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1459 gdb_file_up stream
= desc
.to_file (FDOPEN_MODE
);
1460 clearerr (stream
.get ());
1462 gdb::def_vector
<char> buf
;
1469 int c
= fgetc (stream
.get ());
1476 while (c
!= '\n' && (c
= fgetc (stream
.get ())) >= 0);
1478 /* Remove the \r, if any, at the end of the line, otherwise
1479 regular expressions that end with $ or \n won't work. */
1480 size_t sz
= buf
.size ();
1481 if (sz
>= 2 && buf
[sz
- 2] == '\r')
1484 buf
.resize (sz
- 1);
1487 /* We now have a source line in buf, null terminate and match. */
1488 buf
.push_back ('\0');
1489 if (re_exec (buf
.data ()) > 0)
1492 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1493 set_internalvar_integer (lookup_internalvar ("_"), line
);
1494 current_source_line
= std::max (line
- lines_to_list
/ 2, 1);
1505 if (fseek (stream
.get (), (*offsets
)[line
- 1], 0) < 0)
1507 const char *filename
1508 = symtab_to_filename_for_display (current_source_symtab
);
1509 perror_with_name (filename
);
1514 printf_filtered (_("Expression not found\n"));
1518 forward_search_command (const char *regex
, int from_tty
)
1520 search_command_helper (regex
, from_tty
, true);
1524 reverse_search_command (const char *regex
, int from_tty
)
1526 search_command_helper (regex
, from_tty
, false);
1529 /* If the last character of PATH is a directory separator, then strip it. */
1532 strip_trailing_directory_separator (char *path
)
1534 const int last
= strlen (path
) - 1;
1537 return; /* No stripping is needed if PATH is the empty string. */
1539 if (IS_DIR_SEPARATOR (path
[last
]))
1543 /* Return the path substitution rule that matches FROM.
1544 Return NULL if no rule matches. */
1546 static struct substitute_path_rule
*
1547 find_substitute_path_rule (const char *from
)
1549 struct substitute_path_rule
*rule
= substitute_path_rules
;
1551 while (rule
!= NULL
)
1553 if (FILENAME_CMP (rule
->from
, from
) == 0)
1561 /* Add a new substitute-path rule at the end of the current list of rules.
1562 The new rule will replace FROM into TO. */
1565 add_substitute_path_rule (char *from
, char *to
)
1567 struct substitute_path_rule
*rule
;
1568 struct substitute_path_rule
*new_rule
= XNEW (struct substitute_path_rule
);
1570 new_rule
->from
= xstrdup (from
);
1571 new_rule
->to
= xstrdup (to
);
1572 new_rule
->next
= NULL
;
1574 /* If the list of rules are empty, then insert the new rule
1575 at the head of the list. */
1577 if (substitute_path_rules
== NULL
)
1579 substitute_path_rules
= new_rule
;
1583 /* Otherwise, skip to the last rule in our list and then append
1586 rule
= substitute_path_rules
;
1587 while (rule
->next
!= NULL
)
1590 rule
->next
= new_rule
;
1593 /* Remove the given source path substitution rule from the current list
1594 of rules. The memory allocated for that rule is also deallocated. */
1597 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1599 if (rule
== substitute_path_rules
)
1600 substitute_path_rules
= rule
->next
;
1603 struct substitute_path_rule
*prev
= substitute_path_rules
;
1605 while (prev
!= NULL
&& prev
->next
!= rule
)
1608 gdb_assert (prev
!= NULL
);
1610 prev
->next
= rule
->next
;
1618 /* Implement the "show substitute-path" command. */
1621 show_substitute_path_command (const char *args
, int from_tty
)
1623 struct substitute_path_rule
*rule
= substitute_path_rules
;
1626 gdb_argv
argv (args
);
1628 /* We expect zero or one argument. */
1630 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1631 error (_("Too many arguments in command"));
1633 if (argv
!= NULL
&& argv
[0] != NULL
)
1636 /* Print the substitution rules. */
1640 (_("Source path substitution rule matching `%s':\n"), from
);
1642 printf_filtered (_("List of all source path substitution rules:\n"));
1644 while (rule
!= NULL
)
1646 if (from
== NULL
|| substitute_path_rule_matches (rule
, from
) != 0)
1647 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1652 /* Implement the "unset substitute-path" command. */
1655 unset_substitute_path_command (const char *args
, int from_tty
)
1657 struct substitute_path_rule
*rule
= substitute_path_rules
;
1658 gdb_argv
argv (args
);
1662 /* This function takes either 0 or 1 argument. */
1664 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1665 error (_("Incorrect usage, too many arguments in command"));
1667 if (argv
!= NULL
&& argv
[0] != NULL
)
1670 /* If the user asked for all the rules to be deleted, ask him
1671 to confirm and give him a chance to abort before the action
1675 && !query (_("Delete all source path substitution rules? ")))
1676 error (_("Canceled"));
1678 /* Delete the rule matching the argument. No argument means that
1679 all rules should be deleted. */
1681 while (rule
!= NULL
)
1683 struct substitute_path_rule
*next
= rule
->next
;
1685 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1687 delete_substitute_path_rule (rule
);
1694 /* If the user asked for a specific rule to be deleted but
1695 we could not find it, then report an error. */
1697 if (from
!= NULL
&& !rule_found
)
1698 error (_("No substitution rule defined for `%s'"), from
);
1700 forget_cached_source_info ();
1703 /* Add a new source path substitution rule. */
1706 set_substitute_path_command (const char *args
, int from_tty
)
1708 struct substitute_path_rule
*rule
;
1710 gdb_argv
argv (args
);
1712 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1713 error (_("Incorrect usage, too few arguments in command"));
1715 if (argv
[2] != NULL
)
1716 error (_("Incorrect usage, too many arguments in command"));
1718 if (*(argv
[0]) == '\0')
1719 error (_("First argument must be at least one character long"));
1721 /* Strip any trailing directory separator character in either FROM
1722 or TO. The substitution rule already implicitly contains them. */
1723 strip_trailing_directory_separator (argv
[0]);
1724 strip_trailing_directory_separator (argv
[1]);
1726 /* If a rule with the same "from" was previously defined, then
1727 delete it. This new rule replaces it. */
1729 rule
= find_substitute_path_rule (argv
[0]);
1731 delete_substitute_path_rule (rule
);
1733 /* Insert the new substitution rule. */
1735 add_substitute_path_rule (argv
[0], argv
[1]);
1736 forget_cached_source_info ();
1741 source_lines_range::source_lines_range (int startline
,
1742 source_lines_range::direction dir
)
1744 if (dir
== source_lines_range::FORWARD
)
1746 LONGEST end
= static_cast <LONGEST
> (startline
) + get_lines_to_list ();
1751 m_startline
= startline
;
1752 m_stopline
= static_cast <int> (end
);
1756 LONGEST start
= static_cast <LONGEST
> (startline
) - get_lines_to_list ();
1761 m_startline
= static_cast <int> (start
);
1762 m_stopline
= startline
;
1768 _initialize_source (void)
1770 struct cmd_list_element
*c
;
1772 current_source_symtab
= 0;
1773 init_source_path ();
1775 /* The intention is to use POSIX Basic Regular Expressions.
1776 Always use the GNU regex routine for consistency across all hosts.
1777 Our current GNU regex.c does not have all the POSIX features, so this is
1778 just an approximation. */
1779 re_set_syntax (RE_SYNTAX_GREP
);
1781 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1782 Add directory DIR to beginning of search path for source files.\n\
1783 Forget cached info on source file locations and line positions.\n\
1784 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1785 directory in which the source file was compiled into object code.\n\
1786 With no argument, reset the search path to $cdir:$cwd, the default."),
1790 add_com_alias ("use", "directory", class_files
, 0);
1792 set_cmd_completer (c
, filename_completer
);
1794 add_setshow_optional_filename_cmd ("directories",
1798 Set the search path for finding source files."),
1800 Show the search path for finding source files."),
1802 $cwd in the path means the current working directory.\n\
1803 $cdir in the path means the compilation directory of the source file.\n\
1804 GDB ensures the search path always ends with $cdir:$cwd by\n\
1805 appending these directories if necessary.\n\
1806 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1807 set_directories_command
,
1808 show_directories_command
,
1809 &setlist
, &showlist
);
1811 add_info ("source", info_source_command
,
1812 _("Information about the current source file."));
1814 add_info ("line", info_line_command
, _("\
1815 Core addresses of the code for a source line.\n\
1816 Line can be specified as\n\
1817 LINENUM, to list around that line in current file,\n\
1818 FILE:LINENUM, to list around that line in that file,\n\
1819 FUNCTION, to list around beginning of that function,\n\
1820 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1821 Default is to describe the last source line that was listed.\n\n\
1822 This sets the default address for \"x\" to the line's first instruction\n\
1823 so that \"x/i\" suffices to start examining the machine code.\n\
1824 The address is also stored as the value of \"$_\"."));
1826 add_com ("forward-search", class_files
, forward_search_command
, _("\
1827 Search for regular expression (see regex(3)) from last line listed.\n\
1828 The matching line number is also stored as the value of \"$_\"."));
1829 add_com_alias ("search", "forward-search", class_files
, 0);
1830 add_com_alias ("fo", "forward-search", class_files
, 1);
1832 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1833 Search backward for regular expression (see regex(3)) from last line listed.\n\
1834 The matching line number is also stored as the value of \"$_\"."));
1835 add_com_alias ("rev", "reverse-search", class_files
, 1);
1837 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
1838 Set number of source lines gdb will list by default."), _("\
1839 Show number of source lines gdb will list by default."), _("\
1840 Use this to choose how many source lines the \"list\" displays (unless\n\
1841 the \"list\" argument explicitly specifies some other number).\n\
1842 A value of \"unlimited\", or zero, means there's no limit."),
1845 &setlist
, &showlist
);
1847 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
1849 Usage: set substitute-path FROM TO\n\
1850 Add a substitution rule replacing FROM into TO in source file names.\n\
1851 If a substitution rule was previously set for FROM, the old rule\n\
1852 is replaced by the new one."),
1855 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
1857 Usage: unset substitute-path [FROM]\n\
1858 Delete the rule for substituting FROM in source file names. If FROM\n\
1859 is not specified, all substituting rules are deleted.\n\
1860 If the debugger cannot find a rule for FROM, it will display a warning."),
1863 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
1865 Usage: show substitute-path [FROM]\n\
1866 Print the rule for substituting FROM in source file names. If FROM\n\
1867 is not specified, print all substitution rules."),
1870 add_setshow_enum_cmd ("filename-display", class_files
,
1871 filename_display_kind_names
,
1872 &filename_display_string
, _("\
1873 Set how to display filenames."), _("\
1874 Show how to display filenames."), _("\
1875 filename-display can be:\n\
1876 basename - display only basename of a filename\n\
1877 relative - display a filename relative to the compilation directory\n\
1878 absolute - display an absolute filename\n\
1879 By default, relative filenames are displayed."),
1881 show_filename_display_string
,
1882 &setlist
, &showlist
);