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;
239 select_source_symtab (struct symtab
*s
)
245 current_source_symtab
= s
;
246 current_source_line
= 1;
247 current_source_pspace
= SYMTAB_PSPACE (s
);
251 if (current_source_symtab
)
254 /* Make the default place to list be the function `main'
256 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0).symbol
)
258 std::vector
<symtab_and_line
> sals
259 = decode_line_with_current_source (main_name (),
260 DECODE_LINE_FUNFIRSTLINE
);
261 const symtab_and_line
&sal
= sals
[0];
262 current_source_pspace
= sal
.pspace
;
263 current_source_symtab
= sal
.symtab
;
264 current_source_line
= std::max (sal
.line
- (lines_to_list
- 1), 1);
265 if (current_source_symtab
)
269 /* Alright; find the last file in the symtab list (ignoring .h's
270 and namespace symtabs). */
272 current_source_line
= 1;
274 ALL_FILETABS (ofp
, cu
, symtab
)
276 const char *name
= symtab
->filename
;
277 int len
= strlen (name
);
279 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
280 || strcmp (name
, "<<C++-namespaces>>") == 0)))
282 current_source_pspace
= current_program_space
;
283 current_source_symtab
= symtab
;
287 if (current_source_symtab
)
290 for (objfile
*objfile
: all_objfiles (current_program_space
))
293 s
= objfile
->sf
->qf
->find_last_source_symtab (objfile
);
295 current_source_symtab
= s
;
297 if (current_source_symtab
)
300 error (_("Can't find a default source file"));
303 /* Handler for "set directories path-list" command.
304 "set dir mumble" doesn't prepend paths, it resets the entire
305 path list. The theory is that set(show(dir)) should be a no-op. */
308 set_directories_command (const char *args
,
309 int from_tty
, struct cmd_list_element
*c
)
311 /* This is the value that was set.
312 It needs to be processed to maintain $cdir:$cwd and remove dups. */
313 char *set_path
= source_path
;
315 /* We preserve the invariant that $cdir:$cwd begins life at the end of
316 the list by calling init_source_path. If they appear earlier in
317 SET_PATH then mod_path will move them appropriately.
318 mod_path will also remove duplicates. */
320 if (*set_path
!= '\0')
321 mod_path (set_path
, &source_path
);
326 /* Print the list of source directories.
327 This is used by the "ld" command, so it has the signature of a command
331 show_directories_1 (char *ignore
, int from_tty
)
333 puts_filtered ("Source directories searched: ");
334 puts_filtered (source_path
);
335 puts_filtered ("\n");
338 /* Handler for "show directories" command. */
341 show_directories_command (struct ui_file
*file
, int from_tty
,
342 struct cmd_list_element
*c
, const char *value
)
344 show_directories_1 (NULL
, from_tty
);
350 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
352 for (compunit_symtab
*cu
: objfile_compunits (objfile
))
354 for (symtab
*s
: compunit_filetabs (cu
))
356 if (s
->line_charpos
!= NULL
)
358 xfree (s
->line_charpos
);
359 s
->line_charpos
= NULL
;
361 if (s
->fullname
!= NULL
)
370 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
376 forget_cached_source_info (void)
378 struct program_space
*pspace
;
381 for (objfile
*objfile
: all_objfiles (pspace
))
383 forget_cached_source_info_for_objfile (objfile
);
386 g_source_cache
.clear ();
387 last_source_visited
= NULL
;
391 init_source_path (void)
395 xsnprintf (buf
, sizeof (buf
), "$cdir%c$cwd", DIRNAME_SEPARATOR
);
396 source_path
= xstrdup (buf
);
397 forget_cached_source_info ();
400 /* Add zero or more directories to the front of the source path. */
403 directory_command (const char *dirname
, int from_tty
)
406 /* FIXME, this goes to "delete dir"... */
409 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
417 mod_path (dirname
, &source_path
);
418 forget_cached_source_info ();
421 show_directories_1 ((char *) 0, from_tty
);
424 /* Add a path given with the -d command line switch.
425 This will not be quoted so we must not treat spaces as separators. */
428 directory_switch (const char *dirname
, int from_tty
)
430 add_path (dirname
, &source_path
, 0);
433 /* Add zero or more directories to the front of an arbitrary path. */
436 mod_path (const char *dirname
, char **which_path
)
438 add_path (dirname
, which_path
, 1);
441 /* Workhorse of mod_path. Takes an extra argument to determine
442 if dirname should be parsed for separators that indicate multiple
443 directories. This allows for interfaces that pre-parse the dirname
444 and allow specification of traditional separator characters such
448 add_path (const char *dirname
, char **which_path
, int parse_separators
)
450 char *old
= *which_path
;
452 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
457 if (parse_separators
)
459 /* This will properly parse the space and tab separators
460 and any quotes that may exist. */
461 gdb_argv
argv (dirname
);
463 for (char *arg
: argv
)
464 dirnames_to_char_ptr_vec_append (&dir_vec
, arg
);
467 dir_vec
.emplace_back (xstrdup (dirname
));
469 for (const gdb::unique_xmalloc_ptr
<char> &name_up
: dir_vec
)
471 char *name
= name_up
.get ();
474 gdb::unique_xmalloc_ptr
<char> new_name_holder
;
476 /* Spaces and tabs will have been removed by buildargv().
477 NAME is the start of the directory.
478 P is the '\0' following the end. */
479 p
= name
+ strlen (name
);
481 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
482 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
483 /* On MS-DOS and MS-Windows, h:\ is different from h: */
484 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
486 && IS_DIR_SEPARATOR (p
[-1]))
487 /* Sigh. "foo/" => "foo" */
491 while (p
> name
&& p
[-1] == '.')
495 /* "." => getwd (). */
496 name
= current_directory
;
499 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
509 /* "...foo/." => "...foo". */
520 new_name_holder
.reset (tilde_expand (name
));
521 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
522 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
523 new_name_holder
.reset (concat (name
, ".", (char *) NULL
));
525 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
526 new_name_holder
.reset (concat (current_directory
, SLASH_STRING
, name
,
529 new_name_holder
.reset (savestring (name
, p
- name
));
530 name
= new_name_holder
.get ();
532 /* Unless it's a variable, check existence. */
535 /* These are warnings, not errors, since we don't want a
536 non-existent directory in a .gdbinit file to stop processing
537 of the .gdbinit file.
539 Whether they get added to the path is more debatable. Current
540 answer is yes, in case the user wants to go make the directory
541 or whatever. If the directory continues to not exist/not be
542 a directory/etc, then having them in the path should be
544 if (stat (name
, &st
) < 0)
546 int save_errno
= errno
;
548 fprintf_unfiltered (gdb_stderr
, "Warning: ");
549 print_sys_errmsg (name
, save_errno
);
551 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
552 warning (_("%s is not a directory."), name
);
557 unsigned int len
= strlen (name
);
563 /* FIXME: we should use realpath() or its work-alike
564 before comparing. Then all the code above which
565 removes excess slashes and dots could simply go away. */
566 if (!filename_ncmp (p
, name
, len
)
567 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
569 /* Found it in the search path, remove old copy. */
572 /* Back over leading separator. */
575 if (prefix
> p
- *which_path
)
577 /* Same dir twice in one cmd. */
580 /* Copy from next '\0' or ':'. */
581 memmove (p
, &p
[len
+ 1], strlen (&p
[len
+ 1]) + 1);
583 p
= strchr (p
, DIRNAME_SEPARATOR
);
590 tinybuf
[0] = DIRNAME_SEPARATOR
;
593 /* If we have already tacked on a name(s) in this command,
594 be sure they stay on the front as we tack on some
602 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
604 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
605 prefix
= strlen (temp
);
610 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
612 prefix
= strlen (name
);
624 info_source_command (const char *ignore
, int from_tty
)
626 struct symtab
*s
= current_source_symtab
;
627 struct compunit_symtab
*cust
;
631 printf_filtered (_("No current source file.\n"));
635 cust
= SYMTAB_COMPUNIT (s
);
636 printf_filtered (_("Current source file is %s\n"), s
->filename
);
637 if (SYMTAB_DIRNAME (s
) != NULL
)
638 printf_filtered (_("Compilation directory is %s\n"), SYMTAB_DIRNAME (s
));
640 printf_filtered (_("Located in %s\n"), s
->fullname
);
642 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
643 s
->nlines
== 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 *fullname
= gdb_realpath (fullname
->get ());
987 return scoped_fd (result
);
990 /* Didn't work -- free old one, try again. */
991 fullname
->reset (NULL
);
994 gdb::unique_xmalloc_ptr
<char> rewritten_dirname
;
997 /* If necessary, rewrite the compilation directory name according
998 to the source path substitution rules specified by the user. */
1000 rewritten_dirname
= rewrite_source_path (dirname
);
1002 if (rewritten_dirname
!= NULL
)
1003 dirname
= rewritten_dirname
.get ();
1005 /* Replace a path entry of $cdir with the compilation directory
1008 /* We cast strstr's result in case an ANSIhole has made it const,
1009 which produces a "required warning" when assigned to a nonconst. */
1010 p
= (char *) strstr (source_path
, "$cdir");
1011 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1012 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1017 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1018 len
= p
- source_path
;
1019 strncpy (path
, source_path
, len
); /* Before $cdir */
1020 strcpy (path
+ len
, dirname
); /* new stuff */
1021 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1026 gdb::unique_xmalloc_ptr
<char> rewritten_filename
;
1027 if (IS_ABSOLUTE_PATH (filename
))
1029 /* If filename is absolute path, try the source path
1030 substitution on it. */
1031 rewritten_filename
= rewrite_source_path (filename
);
1033 if (rewritten_filename
!= NULL
)
1034 filename
= rewritten_filename
.get ();
1037 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, filename
,
1038 OPEN_MODE
, fullname
);
1041 /* Didn't work. Try using just the basename. */
1042 p
= lbasename (filename
);
1044 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, p
,
1045 OPEN_MODE
, fullname
);
1048 return scoped_fd (result
);
1051 /* Open a source file given a symtab S. Returns a file descriptor or
1052 negative number for error.
1054 This function is a convience function to find_and_open_source. */
1057 open_source_file (struct symtab
*s
)
1060 return scoped_fd (-1);
1062 gdb::unique_xmalloc_ptr
<char> fullname (s
->fullname
);
1064 scoped_fd fd
= find_and_open_source (s
->filename
, SYMTAB_DIRNAME (s
),
1066 s
->fullname
= fullname
.release ();
1070 /* Finds the fullname that a symtab represents.
1072 This functions finds the fullname and saves it in s->fullname.
1073 It will also return the value.
1075 If this function fails to find the file that this symtab represents,
1076 the expected fullname is used. Therefore the files does not have to
1080 symtab_to_fullname (struct symtab
*s
)
1082 /* Use cached copy if we have it.
1083 We rely on forget_cached_source_info being called appropriately
1084 to handle cases like the file being moved. */
1085 if (s
->fullname
== NULL
)
1087 scoped_fd fd
= open_source_file (s
);
1091 gdb::unique_xmalloc_ptr
<char> fullname
;
1093 /* rewrite_source_path would be applied by find_and_open_source, we
1094 should report the pathname where GDB tried to find the file. */
1096 if (SYMTAB_DIRNAME (s
) == NULL
|| IS_ABSOLUTE_PATH (s
->filename
))
1097 fullname
.reset (xstrdup (s
->filename
));
1099 fullname
.reset (concat (SYMTAB_DIRNAME (s
), SLASH_STRING
,
1100 s
->filename
, (char *) NULL
));
1102 s
->fullname
= rewrite_source_path (fullname
.get ()).release ();
1103 if (s
->fullname
== NULL
)
1104 s
->fullname
= fullname
.release ();
1111 /* See commentary in source.h. */
1114 symtab_to_filename_for_display (struct symtab
*symtab
)
1116 if (filename_display_string
== filename_display_basename
)
1117 return lbasename (symtab
->filename
);
1118 else if (filename_display_string
== filename_display_absolute
)
1119 return symtab_to_fullname (symtab
);
1120 else if (filename_display_string
== filename_display_relative
)
1121 return symtab
->filename
;
1123 internal_error (__FILE__
, __LINE__
, _("invalid filename_display_string"));
1126 /* Create and initialize the table S->line_charpos that records
1127 the positions of the lines in the source file, which is assumed
1128 to be open on descriptor DESC.
1129 All set S->nlines to the number of such lines. */
1132 find_source_lines (struct symtab
*s
, int desc
)
1137 int lines_allocated
= 1000;
1143 line_charpos
= XNEWVEC (int, lines_allocated
);
1144 if (fstat (desc
, &st
) < 0)
1145 perror_with_name (symtab_to_filename_for_display (s
));
1147 if (SYMTAB_OBJFILE (s
) != NULL
&& SYMTAB_OBJFILE (s
)->obfd
!= NULL
)
1148 mtime
= SYMTAB_OBJFILE (s
)->mtime
;
1150 mtime
= exec_bfd_mtime
;
1152 if (mtime
&& mtime
< st
.st_mtime
)
1153 warning (_("Source file is more recent than executable."));
1156 /* st_size might be a large type, but we only support source files whose
1157 size fits in an int. */
1158 size
= (int) st
.st_size
;
1160 /* Use the heap, not the stack, because this may be pretty large,
1161 and we may run into various kinds of limits on stack size. */
1162 gdb::def_vector
<char> data (size
);
1164 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1165 size
= myread (desc
, data
.data (), size
);
1167 perror_with_name (symtab_to_filename_for_display (s
));
1168 end
= data
.data () + size
;
1170 line_charpos
[0] = 0;
1175 /* A newline at the end does not start a new line. */
1178 if (nlines
== lines_allocated
)
1180 lines_allocated
*= 2;
1182 (int *) xrealloc ((char *) line_charpos
,
1183 sizeof (int) * lines_allocated
);
1185 line_charpos
[nlines
++] = p
- data
.data ();
1192 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1198 /* Get full pathname and line number positions for a symtab.
1199 Set *FULLNAME to actual name of the file as found by `openp',
1200 or to 0 if the file is not found. */
1203 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1205 scoped_fd desc
= open_source_file (s
);
1206 if (desc
.get () < 0)
1213 *fullname
= s
->fullname
;
1214 if (s
->line_charpos
== 0)
1215 find_source_lines (s
, desc
.get ());
1221 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1224 if (s
->line_charpos
== 0)
1225 get_filename_and_charpos (s
, (char **) NULL
);
1226 if (s
->fullname
== 0)
1228 if (line
> s
->nlines
)
1229 /* Don't index off the end of the line_charpos array. */
1231 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1232 mid_statement
, get_objfile_arch (SYMTAB_OBJFILE (s
)), pc
);
1234 current_source_line
= line
;
1235 current_source_symtab
= s
;
1236 clear_lines_listed_range ();
1241 /* Print source lines from the file of symtab S,
1242 starting with line number LINE and stopping before line number STOPLINE. */
1245 print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1246 print_source_lines_flags flags
)
1251 int nlines
= stopline
- line
;
1252 struct ui_out
*uiout
= current_uiout
;
1254 /* Regardless of whether we can open the file, set current_source_symtab. */
1255 current_source_symtab
= s
;
1256 current_source_line
= line
;
1257 first_line_listed
= line
;
1259 /* If printing of source lines is disabled, just print file and line
1261 if (uiout
->test_flags (ui_source_list
))
1263 /* Only prints "No such file or directory" once. */
1264 if ((s
!= last_source_visited
) || (!last_source_error
))
1266 last_source_visited
= s
;
1267 desc
= open_source_file (s
);
1268 if (desc
.get () < 0)
1270 last_source_error
= desc
.get ();
1276 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1282 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1288 if (!(flags
& PRINT_SOURCE_LINES_NOERROR
))
1290 const char *filename
= symtab_to_filename_for_display (s
);
1291 int len
= strlen (filename
) + 100;
1292 char *name
= (char *) alloca (len
);
1294 xsnprintf (name
, len
, "%d\t%s", line
, filename
);
1295 print_sys_errmsg (name
, errno
);
1299 uiout
->field_int ("line", line
);
1300 uiout
->text ("\tin ");
1302 /* CLI expects only the "file" field. TUI expects only the
1303 "fullname" field (and TUI does break if "file" is printed).
1304 MI expects both fields. ui_source_list is set only for CLI,
1306 if (uiout
->is_mi_like_p () || uiout
->test_flags (ui_source_list
))
1307 uiout
->field_string ("file", symtab_to_filename_for_display (s
),
1308 ui_out_style_kind::FILE);
1309 if (uiout
->is_mi_like_p () || !uiout
->test_flags (ui_source_list
))
1311 const char *s_fullname
= symtab_to_fullname (s
);
1312 char *local_fullname
;
1314 /* ui_out_field_string may free S_FULLNAME by calling
1315 open_source_file for it again. See e.g.,
1316 tui_field_string->tui_show_source. */
1317 local_fullname
= (char *) alloca (strlen (s_fullname
) + 1);
1318 strcpy (local_fullname
, s_fullname
);
1320 uiout
->field_string ("fullname", local_fullname
);
1329 last_source_error
= 0;
1331 /* If the user requested a sequence of lines that seems to go backward
1332 (from high to low line numbers) then we don't print anything. */
1333 if (stopline
<= line
)
1337 if (!g_source_cache
.get_source_lines (s
, line
, stopline
- 1, &lines
))
1338 error (_("Line number %d out of range; %s has %d lines."),
1339 line
, symtab_to_filename_for_display (s
), s
->nlines
);
1341 const char *iter
= lines
.c_str ();
1342 while (nlines
-- > 0)
1349 last_line_listed
= current_source_line
;
1350 if (flags
& PRINT_SOURCE_LINES_FILENAME
)
1352 uiout
->text (symtab_to_filename_for_display (s
));
1355 xsnprintf (buf
, sizeof (buf
), "%d\t", current_source_line
++);
1359 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r' && c
!= '\033')
1361 xsnprintf (buf
, sizeof (buf
), "^%c", c
+ 0100);
1368 /* Skip a \r character, but only before a \n. */
1370 printf_filtered ("^%c", c
+ 0100);
1374 xsnprintf (buf
, sizeof (buf
), "%c", c
);
1378 while (c
!= '\n' && (c
= *iter
++) != '\0');
1382 if (!lines
.empty() && lines
.back () != '\n')
1390 print_source_lines (struct symtab
*s
, int line
, int stopline
,
1391 print_source_lines_flags flags
)
1393 print_source_lines_base (s
, line
, stopline
, flags
);
1399 print_source_lines (struct symtab
*s
, source_lines_range line_range
,
1400 print_source_lines_flags flags
)
1402 print_source_lines_base (s
, line_range
.startline (),
1403 line_range
.stopline (), flags
);
1408 /* Print info on range of pc's in a specified line. */
1411 info_line_command (const char *arg
, int from_tty
)
1413 CORE_ADDR start_pc
, end_pc
;
1415 std::vector
<symtab_and_line
> decoded_sals
;
1416 symtab_and_line curr_sal
;
1417 gdb::array_view
<symtab_and_line
> sals
;
1421 curr_sal
.symtab
= current_source_symtab
;
1422 curr_sal
.pspace
= current_program_space
;
1423 if (last_line_listed
!= 0)
1424 curr_sal
.line
= last_line_listed
;
1426 curr_sal
.line
= current_source_line
;
1432 decoded_sals
= decode_line_with_last_displayed (arg
,
1433 DECODE_LINE_LIST_MODE
);
1434 sals
= decoded_sals
;
1439 /* C++ More than one line may have been specified, as when the user
1440 specifies an overloaded function name. Print info on them all. */
1441 for (const auto &sal
: sals
)
1443 if (sal
.pspace
!= current_program_space
)
1446 if (sal
.symtab
== 0)
1448 struct gdbarch
*gdbarch
= get_current_arch ();
1450 printf_filtered (_("No line number information available"));
1453 /* This is useful for "info line *0x7f34". If we can't tell the
1454 user about a source line, at least let them have the symbolic
1456 printf_filtered (" for address ");
1458 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1461 printf_filtered (".");
1462 printf_filtered ("\n");
1464 else if (sal
.line
> 0
1465 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1467 struct gdbarch
*gdbarch
1468 = get_objfile_arch (SYMTAB_OBJFILE (sal
.symtab
));
1470 if (start_pc
== end_pc
)
1472 printf_filtered ("Line %d of \"%s\"",
1474 symtab_to_filename_for_display (sal
.symtab
));
1476 printf_filtered (" is at address ");
1477 print_address (gdbarch
, start_pc
, gdb_stdout
);
1479 printf_filtered (" but contains no code.\n");
1483 printf_filtered ("Line %d of \"%s\"",
1485 symtab_to_filename_for_display (sal
.symtab
));
1487 printf_filtered (" starts at address ");
1488 print_address (gdbarch
, start_pc
, gdb_stdout
);
1490 printf_filtered (" and ends at ");
1491 print_address (gdbarch
, end_pc
, gdb_stdout
);
1492 printf_filtered (".\n");
1495 /* x/i should display this line's code. */
1496 set_next_address (gdbarch
, start_pc
);
1498 /* Repeating "info line" should do the following line. */
1499 last_line_listed
= sal
.line
+ 1;
1501 /* If this is the only line, show the source code. If it could
1502 not find the file, don't do anything special. */
1503 if (annotation_level
&& sals
.size () == 1)
1504 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1507 /* Is there any case in which we get here, and have an address
1508 which the user would want to see? If we have debugging symbols
1509 and no line numbers? */
1510 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1511 sal
.line
, symtab_to_filename_for_display (sal
.symtab
));
1515 /* Commands to search the source file for a regexp. */
1517 /* Helper for forward_search_command/reverse_search_command. FORWARD
1518 indicates direction: true for forward, false for
1519 backward/reverse. */
1522 search_command_helper (const char *regex
, int from_tty
, bool forward
)
1524 const char *msg
= re_comp (regex
);
1526 error (("%s"), msg
);
1528 if (current_source_symtab
== 0)
1529 select_source_symtab (0);
1531 scoped_fd desc
= open_source_file (current_source_symtab
);
1532 if (desc
.get () < 0)
1533 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1535 if (current_source_symtab
->line_charpos
== 0)
1536 find_source_lines (current_source_symtab
, desc
.get ());
1539 ? last_line_listed
+ 1
1540 : last_line_listed
- 1);
1542 if (line
< 1 || line
> current_source_symtab
->nlines
)
1543 error (_("Expression not found"));
1545 if (lseek (desc
.get (), current_source_symtab
->line_charpos
[line
- 1], 0)
1547 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1549 gdb_file_up stream
= desc
.to_file (FDOPEN_MODE
);
1550 clearerr (stream
.get ());
1552 gdb::def_vector
<char> buf
;
1559 int c
= fgetc (stream
.get ());
1566 while (c
!= '\n' && (c
= fgetc (stream
.get ())) >= 0);
1568 /* Remove the \r, if any, at the end of the line, otherwise
1569 regular expressions that end with $ or \n won't work. */
1570 size_t sz
= buf
.size ();
1571 if (sz
>= 2 && buf
[sz
- 2] == '\r')
1574 buf
.resize (sz
- 1);
1577 /* We now have a source line in buf, null terminate and match. */
1578 buf
.push_back ('\0');
1579 if (re_exec (buf
.data ()) > 0)
1582 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1583 set_internalvar_integer (lookup_internalvar ("_"), line
);
1584 current_source_line
= std::max (line
- lines_to_list
/ 2, 1);
1595 if (fseek (stream
.get (),
1596 current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1598 const char *filename
1599 = symtab_to_filename_for_display (current_source_symtab
);
1600 perror_with_name (filename
);
1605 printf_filtered (_("Expression not found\n"));
1609 forward_search_command (const char *regex
, int from_tty
)
1611 search_command_helper (regex
, from_tty
, true);
1615 reverse_search_command (const char *regex
, int from_tty
)
1617 search_command_helper (regex
, from_tty
, false);
1620 /* If the last character of PATH is a directory separator, then strip it. */
1623 strip_trailing_directory_separator (char *path
)
1625 const int last
= strlen (path
) - 1;
1628 return; /* No stripping is needed if PATH is the empty string. */
1630 if (IS_DIR_SEPARATOR (path
[last
]))
1634 /* Return the path substitution rule that matches FROM.
1635 Return NULL if no rule matches. */
1637 static struct substitute_path_rule
*
1638 find_substitute_path_rule (const char *from
)
1640 struct substitute_path_rule
*rule
= substitute_path_rules
;
1642 while (rule
!= NULL
)
1644 if (FILENAME_CMP (rule
->from
, from
) == 0)
1652 /* Add a new substitute-path rule at the end of the current list of rules.
1653 The new rule will replace FROM into TO. */
1656 add_substitute_path_rule (char *from
, char *to
)
1658 struct substitute_path_rule
*rule
;
1659 struct substitute_path_rule
*new_rule
= XNEW (struct substitute_path_rule
);
1661 new_rule
->from
= xstrdup (from
);
1662 new_rule
->to
= xstrdup (to
);
1663 new_rule
->next
= NULL
;
1665 /* If the list of rules are empty, then insert the new rule
1666 at the head of the list. */
1668 if (substitute_path_rules
== NULL
)
1670 substitute_path_rules
= new_rule
;
1674 /* Otherwise, skip to the last rule in our list and then append
1677 rule
= substitute_path_rules
;
1678 while (rule
->next
!= NULL
)
1681 rule
->next
= new_rule
;
1684 /* Remove the given source path substitution rule from the current list
1685 of rules. The memory allocated for that rule is also deallocated. */
1688 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1690 if (rule
== substitute_path_rules
)
1691 substitute_path_rules
= rule
->next
;
1694 struct substitute_path_rule
*prev
= substitute_path_rules
;
1696 while (prev
!= NULL
&& prev
->next
!= rule
)
1699 gdb_assert (prev
!= NULL
);
1701 prev
->next
= rule
->next
;
1709 /* Implement the "show substitute-path" command. */
1712 show_substitute_path_command (const char *args
, int from_tty
)
1714 struct substitute_path_rule
*rule
= substitute_path_rules
;
1717 gdb_argv
argv (args
);
1719 /* We expect zero or one argument. */
1721 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1722 error (_("Too many arguments in command"));
1724 if (argv
!= NULL
&& argv
[0] != NULL
)
1727 /* Print the substitution rules. */
1731 (_("Source path substitution rule matching `%s':\n"), from
);
1733 printf_filtered (_("List of all source path substitution rules:\n"));
1735 while (rule
!= NULL
)
1737 if (from
== NULL
|| substitute_path_rule_matches (rule
, from
) != 0)
1738 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1743 /* Implement the "unset substitute-path" command. */
1746 unset_substitute_path_command (const char *args
, int from_tty
)
1748 struct substitute_path_rule
*rule
= substitute_path_rules
;
1749 gdb_argv
argv (args
);
1753 /* This function takes either 0 or 1 argument. */
1755 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1756 error (_("Incorrect usage, too many arguments in command"));
1758 if (argv
!= NULL
&& argv
[0] != NULL
)
1761 /* If the user asked for all the rules to be deleted, ask him
1762 to confirm and give him a chance to abort before the action
1766 && !query (_("Delete all source path substitution rules? ")))
1767 error (_("Canceled"));
1769 /* Delete the rule matching the argument. No argument means that
1770 all rules should be deleted. */
1772 while (rule
!= NULL
)
1774 struct substitute_path_rule
*next
= rule
->next
;
1776 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1778 delete_substitute_path_rule (rule
);
1785 /* If the user asked for a specific rule to be deleted but
1786 we could not find it, then report an error. */
1788 if (from
!= NULL
&& !rule_found
)
1789 error (_("No substitution rule defined for `%s'"), from
);
1791 forget_cached_source_info ();
1794 /* Add a new source path substitution rule. */
1797 set_substitute_path_command (const char *args
, int from_tty
)
1799 struct substitute_path_rule
*rule
;
1801 gdb_argv
argv (args
);
1803 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1804 error (_("Incorrect usage, too few arguments in command"));
1806 if (argv
[2] != NULL
)
1807 error (_("Incorrect usage, too many arguments in command"));
1809 if (*(argv
[0]) == '\0')
1810 error (_("First argument must be at least one character long"));
1812 /* Strip any trailing directory separator character in either FROM
1813 or TO. The substitution rule already implicitly contains them. */
1814 strip_trailing_directory_separator (argv
[0]);
1815 strip_trailing_directory_separator (argv
[1]);
1817 /* If a rule with the same "from" was previously defined, then
1818 delete it. This new rule replaces it. */
1820 rule
= find_substitute_path_rule (argv
[0]);
1822 delete_substitute_path_rule (rule
);
1824 /* Insert the new substitution rule. */
1826 add_substitute_path_rule (argv
[0], argv
[1]);
1827 forget_cached_source_info ();
1832 source_lines_range::source_lines_range (int startline
,
1833 source_lines_range::direction dir
)
1835 if (dir
== source_lines_range::FORWARD
)
1837 LONGEST end
= static_cast <LONGEST
> (startline
) + get_lines_to_list ();
1842 m_startline
= startline
;
1843 m_stopline
= static_cast <int> (end
);
1847 LONGEST start
= static_cast <LONGEST
> (startline
) - get_lines_to_list ();
1852 m_startline
= static_cast <int> (start
);
1853 m_stopline
= startline
;
1859 _initialize_source (void)
1861 struct cmd_list_element
*c
;
1863 current_source_symtab
= 0;
1864 init_source_path ();
1866 /* The intention is to use POSIX Basic Regular Expressions.
1867 Always use the GNU regex routine for consistency across all hosts.
1868 Our current GNU regex.c does not have all the POSIX features, so this is
1869 just an approximation. */
1870 re_set_syntax (RE_SYNTAX_GREP
);
1872 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1873 Add directory DIR to beginning of search path for source files.\n\
1874 Forget cached info on source file locations and line positions.\n\
1875 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1876 directory in which the source file was compiled into object code.\n\
1877 With no argument, reset the search path to $cdir:$cwd, the default."),
1881 add_com_alias ("use", "directory", class_files
, 0);
1883 set_cmd_completer (c
, filename_completer
);
1885 add_setshow_optional_filename_cmd ("directories",
1889 Set the search path for finding source files."),
1891 Show the search path for finding source files."),
1893 $cwd in the path means the current working directory.\n\
1894 $cdir in the path means the compilation directory of the source file.\n\
1895 GDB ensures the search path always ends with $cdir:$cwd by\n\
1896 appending these directories if necessary.\n\
1897 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1898 set_directories_command
,
1899 show_directories_command
,
1900 &setlist
, &showlist
);
1902 add_info ("source", info_source_command
,
1903 _("Information about the current source file."));
1905 add_info ("line", info_line_command
, _("\
1906 Core addresses of the code for a source line.\n\
1907 Line can be specified as\n\
1908 LINENUM, to list around that line in current file,\n\
1909 FILE:LINENUM, to list around that line in that file,\n\
1910 FUNCTION, to list around beginning of that function,\n\
1911 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1912 Default is to describe the last source line that was listed.\n\n\
1913 This sets the default address for \"x\" to the line's first instruction\n\
1914 so that \"x/i\" suffices to start examining the machine code.\n\
1915 The address is also stored as the value of \"$_\"."));
1917 add_com ("forward-search", class_files
, forward_search_command
, _("\
1918 Search for regular expression (see regex(3)) from last line listed.\n\
1919 The matching line number is also stored as the value of \"$_\"."));
1920 add_com_alias ("search", "forward-search", class_files
, 0);
1921 add_com_alias ("fo", "forward-search", class_files
, 1);
1923 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1924 Search backward for regular expression (see regex(3)) from last line listed.\n\
1925 The matching line number is also stored as the value of \"$_\"."));
1926 add_com_alias ("rev", "reverse-search", class_files
, 1);
1928 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
1929 Set number of source lines gdb will list by default."), _("\
1930 Show number of source lines gdb will list by default."), _("\
1931 Use this to choose how many source lines the \"list\" displays (unless\n\
1932 the \"list\" argument explicitly specifies some other number).\n\
1933 A value of \"unlimited\", or zero, means there's no limit."),
1936 &setlist
, &showlist
);
1938 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
1940 Usage: set substitute-path FROM TO\n\
1941 Add a substitution rule replacing FROM into TO in source file names.\n\
1942 If a substitution rule was previously set for FROM, the old rule\n\
1943 is replaced by the new one."),
1946 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
1948 Usage: unset substitute-path [FROM]\n\
1949 Delete the rule for substituting FROM in source file names. If FROM\n\
1950 is not specified, all substituting rules are deleted.\n\
1951 If the debugger cannot find a rule for FROM, it will display a warning."),
1954 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
1956 Usage: show substitute-path [FROM]\n\
1957 Print the rule for substituting FROM in source file names. If FROM\n\
1958 is not specified, print all substitution rules."),
1961 add_setshow_enum_cmd ("filename-display", class_files
,
1962 filename_display_kind_names
,
1963 &filename_display_string
, _("\
1964 Set how to display filenames."), _("\
1965 Show how to display filenames."), _("\
1966 filename-display can be:\n\
1967 basename - display only basename of a filename\n\
1968 relative - display a filename relative to the compilation directory\n\
1969 absolute - display an absolute filename\n\
1970 By default, relative filenames are displayed."),
1972 show_filename_display_string
,
1973 &setlist
, &showlist
);