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
)
242 struct compunit_symtab
*cu
;
246 current_source_symtab
= s
;
247 current_source_line
= 1;
248 current_source_pspace
= SYMTAB_PSPACE (s
);
252 if (current_source_symtab
)
255 /* Make the default place to list be the function `main'
257 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0).symbol
)
259 std::vector
<symtab_and_line
> sals
260 = decode_line_with_current_source (main_name (),
261 DECODE_LINE_FUNFIRSTLINE
);
262 const symtab_and_line
&sal
= sals
[0];
263 current_source_pspace
= sal
.pspace
;
264 current_source_symtab
= sal
.symtab
;
265 current_source_line
= std::max (sal
.line
- (lines_to_list
- 1), 1);
266 if (current_source_symtab
)
270 /* Alright; find the last file in the symtab list (ignoring .h's
271 and namespace symtabs). */
273 current_source_line
= 1;
275 ALL_FILETABS (ofp
, cu
, s
)
277 const char *name
= s
->filename
;
278 int len
= strlen (name
);
280 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
281 || strcmp (name
, "<<C++-namespaces>>") == 0)))
283 current_source_pspace
= current_program_space
;
284 current_source_symtab
= s
;
288 if (current_source_symtab
)
294 s
= ofp
->sf
->qf
->find_last_source_symtab (ofp
);
296 current_source_symtab
= s
;
298 if (current_source_symtab
)
301 error (_("Can't find a default source file"));
304 /* Handler for "set directories path-list" command.
305 "set dir mumble" doesn't prepend paths, it resets the entire
306 path list. The theory is that set(show(dir)) should be a no-op. */
309 set_directories_command (const char *args
,
310 int from_tty
, struct cmd_list_element
*c
)
312 /* This is the value that was set.
313 It needs to be processed to maintain $cdir:$cwd and remove dups. */
314 char *set_path
= source_path
;
316 /* We preserve the invariant that $cdir:$cwd begins life at the end of
317 the list by calling init_source_path. If they appear earlier in
318 SET_PATH then mod_path will move them appropriately.
319 mod_path will also remove duplicates. */
321 if (*set_path
!= '\0')
322 mod_path (set_path
, &source_path
);
327 /* Print the list of source directories.
328 This is used by the "ld" command, so it has the signature of a command
332 show_directories_1 (char *ignore
, int from_tty
)
334 puts_filtered ("Source directories searched: ");
335 puts_filtered (source_path
);
336 puts_filtered ("\n");
339 /* Handler for "show directories" command. */
342 show_directories_command (struct ui_file
*file
, int from_tty
,
343 struct cmd_list_element
*c
, const char *value
)
345 show_directories_1 (NULL
, from_tty
);
351 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
353 struct compunit_symtab
*cu
;
356 ALL_OBJFILE_FILETABS (objfile
, cu
, s
)
358 if (s
->line_charpos
!= NULL
)
360 xfree (s
->line_charpos
);
361 s
->line_charpos
= NULL
;
363 if (s
->fullname
!= NULL
)
371 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
377 forget_cached_source_info (void)
379 struct program_space
*pspace
;
380 struct objfile
*objfile
;
383 ALL_PSPACE_OBJFILES (pspace
, objfile
)
385 forget_cached_source_info_for_objfile (objfile
);
388 g_source_cache
.clear ();
389 last_source_visited
= NULL
;
393 init_source_path (void)
397 xsnprintf (buf
, sizeof (buf
), "$cdir%c$cwd", DIRNAME_SEPARATOR
);
398 source_path
= xstrdup (buf
);
399 forget_cached_source_info ();
402 /* Add zero or more directories to the front of the source path. */
405 directory_command (const char *dirname
, int from_tty
)
408 /* FIXME, this goes to "delete dir"... */
411 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
419 mod_path (dirname
, &source_path
);
420 forget_cached_source_info ();
423 show_directories_1 ((char *) 0, from_tty
);
426 /* Add a path given with the -d command line switch.
427 This will not be quoted so we must not treat spaces as separators. */
430 directory_switch (const char *dirname
, int from_tty
)
432 add_path (dirname
, &source_path
, 0);
435 /* Add zero or more directories to the front of an arbitrary path. */
438 mod_path (const char *dirname
, char **which_path
)
440 add_path (dirname
, which_path
, 1);
443 /* Workhorse of mod_path. Takes an extra argument to determine
444 if dirname should be parsed for separators that indicate multiple
445 directories. This allows for interfaces that pre-parse the dirname
446 and allow specification of traditional separator characters such
450 add_path (const char *dirname
, char **which_path
, int parse_separators
)
452 char *old
= *which_path
;
454 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
459 if (parse_separators
)
461 /* This will properly parse the space and tab separators
462 and any quotes that may exist. */
463 gdb_argv
argv (dirname
);
465 for (char *arg
: argv
)
466 dirnames_to_char_ptr_vec_append (&dir_vec
, arg
);
469 dir_vec
.emplace_back (xstrdup (dirname
));
471 for (const gdb::unique_xmalloc_ptr
<char> &name_up
: dir_vec
)
473 char *name
= name_up
.get ();
476 gdb::unique_xmalloc_ptr
<char> new_name_holder
;
478 /* Spaces and tabs will have been removed by buildargv().
479 NAME is the start of the directory.
480 P is the '\0' following the end. */
481 p
= name
+ strlen (name
);
483 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
484 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
485 /* On MS-DOS and MS-Windows, h:\ is different from h: */
486 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
488 && IS_DIR_SEPARATOR (p
[-1]))
489 /* Sigh. "foo/" => "foo" */
493 while (p
> name
&& p
[-1] == '.')
497 /* "." => getwd (). */
498 name
= current_directory
;
501 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
511 /* "...foo/." => "...foo". */
522 new_name_holder
.reset (tilde_expand (name
));
523 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
524 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
525 new_name_holder
.reset (concat (name
, ".", (char *) NULL
));
527 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
528 new_name_holder
.reset (concat (current_directory
, SLASH_STRING
, name
,
531 new_name_holder
.reset (savestring (name
, p
- name
));
532 name
= new_name_holder
.get ();
534 /* Unless it's a variable, check existence. */
537 /* These are warnings, not errors, since we don't want a
538 non-existent directory in a .gdbinit file to stop processing
539 of the .gdbinit file.
541 Whether they get added to the path is more debatable. Current
542 answer is yes, in case the user wants to go make the directory
543 or whatever. If the directory continues to not exist/not be
544 a directory/etc, then having them in the path should be
546 if (stat (name
, &st
) < 0)
548 int save_errno
= errno
;
550 fprintf_unfiltered (gdb_stderr
, "Warning: ");
551 print_sys_errmsg (name
, save_errno
);
553 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
554 warning (_("%s is not a directory."), name
);
559 unsigned int len
= strlen (name
);
565 /* FIXME: we should use realpath() or its work-alike
566 before comparing. Then all the code above which
567 removes excess slashes and dots could simply go away. */
568 if (!filename_ncmp (p
, name
, len
)
569 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
571 /* Found it in the search path, remove old copy. */
574 /* Back over leading separator. */
577 if (prefix
> p
- *which_path
)
579 /* Same dir twice in one cmd. */
582 /* Copy from next '\0' or ':'. */
583 memmove (p
, &p
[len
+ 1], strlen (&p
[len
+ 1]) + 1);
585 p
= strchr (p
, DIRNAME_SEPARATOR
);
592 tinybuf
[0] = DIRNAME_SEPARATOR
;
595 /* If we have already tacked on a name(s) in this command,
596 be sure they stay on the front as we tack on some
604 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
606 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
607 prefix
= strlen (temp
);
612 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
614 prefix
= strlen (name
);
626 info_source_command (const char *ignore
, int from_tty
)
628 struct symtab
*s
= current_source_symtab
;
629 struct compunit_symtab
*cust
;
633 printf_filtered (_("No current source file.\n"));
637 cust
= SYMTAB_COMPUNIT (s
);
638 printf_filtered (_("Current source file is %s\n"), s
->filename
);
639 if (SYMTAB_DIRNAME (s
) != NULL
)
640 printf_filtered (_("Compilation directory is %s\n"), SYMTAB_DIRNAME (s
));
642 printf_filtered (_("Located in %s\n"), s
->fullname
);
644 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
645 s
->nlines
== 1 ? "" : "s");
647 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
648 printf_filtered (_("Producer is %s.\n"),
649 COMPUNIT_PRODUCER (cust
) != NULL
650 ? COMPUNIT_PRODUCER (cust
) : _("unknown"));
651 printf_filtered (_("Compiled with %s debugging format.\n"),
652 COMPUNIT_DEBUGFORMAT (cust
));
653 printf_filtered (_("%s preprocessor macro info.\n"),
654 COMPUNIT_MACRO_TABLE (cust
) != NULL
655 ? "Includes" : "Does not include");
659 /* Open a file named STRING, searching path PATH (dir names sep by some char)
660 using mode MODE in the calls to open. You cannot use this function to
661 create files (O_CREAT).
663 OPTS specifies the function behaviour in specific cases.
665 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
666 (ie pretend the first element of PATH is "."). This also indicates
667 that, unless OPF_SEARCH_IN_PATH is also specified, a slash in STRING
668 disables searching of the path (this is so that "exec-file ./foo" or
669 "symbol-file ./foo" insures that you get that particular version of
670 foo or an error message).
672 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
673 searched in path (we usually want this for source files but not for
676 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
677 the actual file opened (this string will always start with a "/"). We
678 have to take special pains to avoid doubling the "/" between the directory
679 and the file, sigh! Emacs gets confuzzed by this when we print the
682 If OPTS has OPF_RETURN_REALPATH set return FILENAME_OPENED resolved by
683 gdb_realpath. Even without OPF_RETURN_REALPATH this function still returns
684 filename starting with "/". If FILENAME_OPENED is NULL this option has no
687 If a file is found, return the descriptor.
688 Otherwise, return -1, with errno set for the last name we tried to open. */
690 /* >>>> This should only allow files of certain types,
691 >>>> eg executable, non-directory. */
693 openp (const char *path
, openp_flags opts
, const char *string
,
694 int mode
, gdb::unique_xmalloc_ptr
<char> *filename_opened
)
699 /* The errno set for the last name we tried to open (and
702 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
704 /* The open syscall MODE parameter is not specified. */
705 gdb_assert ((mode
& O_CREAT
) == 0);
706 gdb_assert (string
!= NULL
);
708 /* A file with an empty name cannot possibly exist. Report a failure
709 without further checking.
711 This is an optimization which also defends us against buggy
712 implementations of the "stat" function. For instance, we have
713 noticed that a MinGW debugger built on Windows XP 32bits crashes
714 when the debugger is started with an empty argument. */
715 if (string
[0] == '\0')
726 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
728 int i
, reg_file_errno
;
730 if (is_regular_file (string
, ®_file_errno
))
732 filename
= (char *) alloca (strlen (string
) + 1);
733 strcpy (filename
, string
);
734 fd
= gdb_open_cloexec (filename
, mode
, 0);
743 last_errno
= reg_file_errno
;
746 if (!(opts
& OPF_SEARCH_IN_PATH
))
747 for (i
= 0; string
[i
]; i
++)
748 if (IS_DIR_SEPARATOR (string
[i
]))
752 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
753 if (HAS_DRIVE_SPEC (string
))
754 string
= STRIP_DRIVE_SPEC (string
);
756 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
757 while (IS_DIR_SEPARATOR(string
[0]))
761 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
764 alloclen
= strlen (path
) + strlen (string
) + 2;
765 filename
= (char *) alloca (alloclen
);
769 dir_vec
= dirnames_to_char_ptr_vec (path
);
771 for (const gdb::unique_xmalloc_ptr
<char> &dir_up
: dir_vec
)
773 char *dir
= dir_up
.get ();
774 size_t len
= strlen (dir
);
777 if (strcmp (dir
, "$cwd") == 0)
779 /* Name is $cwd -- insert current directory name instead. */
782 /* First, realloc the filename buffer if too short. */
783 len
= strlen (current_directory
);
784 newlen
= len
+ strlen (string
) + 2;
785 if (newlen
> alloclen
)
788 filename
= (char *) alloca (alloclen
);
790 strcpy (filename
, current_directory
);
792 else if (strchr(dir
, '~'))
794 /* See whether we need to expand the tilde. */
797 gdb::unique_xmalloc_ptr
<char> tilde_expanded (tilde_expand (dir
));
799 /* First, realloc the filename buffer if too short. */
800 len
= strlen (tilde_expanded
.get ());
801 newlen
= len
+ strlen (string
) + 2;
802 if (newlen
> alloclen
)
805 filename
= (char *) alloca (alloclen
);
807 strcpy (filename
, tilde_expanded
.get ());
811 /* Normal file name in path -- just use it. */
812 strcpy (filename
, dir
);
814 /* Don't search $cdir. It's also a magic path like $cwd, but we
815 don't have enough information to expand it. The user *could*
816 have an actual directory named '$cdir' but handling that would
817 be confusing, it would mean different things in different
818 contexts. If the user really has '$cdir' one can use './$cdir'.
819 We can get $cdir when loading scripts. When loading source files
820 $cdir must have already been expanded to the correct value. */
821 if (strcmp (dir
, "$cdir") == 0)
825 /* Remove trailing slashes. */
826 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
829 strcat (filename
+ len
, SLASH_STRING
);
830 strcat (filename
, string
);
832 if (is_regular_file (filename
, ®_file_errno
))
834 fd
= gdb_open_cloexec (filename
, mode
, 0);
840 last_errno
= reg_file_errno
;
846 /* If a file was opened, canonicalize its filename. */
848 filename_opened
->reset (NULL
);
849 else if ((opts
& OPF_RETURN_REALPATH
) != 0)
850 *filename_opened
= gdb_realpath (filename
);
852 *filename_opened
= gdb_abspath (filename
);
860 /* This is essentially a convenience, for clients that want the behaviour
861 of openp, using source_path, but that really don't want the file to be
862 opened but want instead just to know what the full pathname is (as
863 qualified against source_path).
865 The current working directory is searched first.
867 If the file was found, this function returns 1, and FULL_PATHNAME is
868 set to the fully-qualified pathname.
870 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
872 source_full_path_of (const char *filename
,
873 gdb::unique_xmalloc_ptr
<char> *full_pathname
)
877 fd
= openp (source_path
,
878 OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
,
879 filename
, O_RDONLY
, full_pathname
);
882 full_pathname
->reset (NULL
);
890 /* Return non-zero if RULE matches PATH, that is if the rule can be
894 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
897 const int from_len
= strlen (rule
->from
);
898 const int path_len
= strlen (path
);
900 if (path_len
< from_len
)
903 /* The substitution rules are anchored at the start of the path,
904 so the path should start with rule->from. */
906 if (filename_ncmp (path
, rule
->from
, from_len
) != 0)
909 /* Make sure that the region in the path that matches the substitution
910 rule is immediately followed by a directory separator (or the end of
911 string character). */
913 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
919 /* Find the substitute-path rule that applies to PATH and return it.
920 Return NULL if no rule applies. */
922 static struct substitute_path_rule
*
923 get_substitute_path_rule (const char *path
)
925 struct substitute_path_rule
*rule
= substitute_path_rules
;
927 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
933 /* If the user specified a source path substitution rule that applies
934 to PATH, then apply it and return the new path.
936 Return NULL if no substitution rule was specified by the user,
937 or if no rule applied to the given PATH. */
939 gdb::unique_xmalloc_ptr
<char>
940 rewrite_source_path (const char *path
)
942 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
949 from_len
= strlen (rule
->from
);
951 /* Compute the rewritten path and return it. */
954 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
955 strcpy (new_path
, rule
->to
);
956 strcat (new_path
, path
+ from_len
);
958 return gdb::unique_xmalloc_ptr
<char> (new_path
);
964 find_and_open_source (const char *filename
,
966 gdb::unique_xmalloc_ptr
<char> *fullname
)
968 char *path
= source_path
;
972 /* Quick way out if we already know its full name. */
976 /* The user may have requested that source paths be rewritten
977 according to substitution rules he provided. If a substitution
978 rule applies to this path, then apply it. */
979 gdb::unique_xmalloc_ptr
<char> rewritten_fullname
980 = rewrite_source_path (fullname
->get ());
982 if (rewritten_fullname
!= NULL
)
983 *fullname
= std::move (rewritten_fullname
);
985 result
= gdb_open_cloexec (fullname
->get (), OPEN_MODE
, 0);
988 *fullname
= gdb_realpath (fullname
->get ());
989 return scoped_fd (result
);
992 /* Didn't work -- free old one, try again. */
993 fullname
->reset (NULL
);
996 gdb::unique_xmalloc_ptr
<char> rewritten_dirname
;
999 /* If necessary, rewrite the compilation directory name according
1000 to the source path substitution rules specified by the user. */
1002 rewritten_dirname
= rewrite_source_path (dirname
);
1004 if (rewritten_dirname
!= NULL
)
1005 dirname
= rewritten_dirname
.get ();
1007 /* Replace a path entry of $cdir with the compilation directory
1010 /* We cast strstr's result in case an ANSIhole has made it const,
1011 which produces a "required warning" when assigned to a nonconst. */
1012 p
= (char *) strstr (source_path
, "$cdir");
1013 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1014 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1019 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1020 len
= p
- source_path
;
1021 strncpy (path
, source_path
, len
); /* Before $cdir */
1022 strcpy (path
+ len
, dirname
); /* new stuff */
1023 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1028 gdb::unique_xmalloc_ptr
<char> rewritten_filename
;
1029 if (IS_ABSOLUTE_PATH (filename
))
1031 /* If filename is absolute path, try the source path
1032 substitution on it. */
1033 rewritten_filename
= rewrite_source_path (filename
);
1035 if (rewritten_filename
!= NULL
)
1036 filename
= rewritten_filename
.get ();
1039 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, filename
,
1040 OPEN_MODE
, fullname
);
1043 /* Didn't work. Try using just the basename. */
1044 p
= lbasename (filename
);
1046 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, p
,
1047 OPEN_MODE
, fullname
);
1050 return scoped_fd (result
);
1053 /* Open a source file given a symtab S. Returns a file descriptor or
1054 negative number for error.
1056 This function is a convience function to find_and_open_source. */
1059 open_source_file (struct symtab
*s
)
1062 return scoped_fd (-1);
1064 gdb::unique_xmalloc_ptr
<char> fullname (s
->fullname
);
1066 scoped_fd fd
= find_and_open_source (s
->filename
, SYMTAB_DIRNAME (s
),
1068 s
->fullname
= fullname
.release ();
1072 /* Finds the fullname that a symtab represents.
1074 This functions finds the fullname and saves it in s->fullname.
1075 It will also return the value.
1077 If this function fails to find the file that this symtab represents,
1078 the expected fullname is used. Therefore the files does not have to
1082 symtab_to_fullname (struct symtab
*s
)
1084 /* Use cached copy if we have it.
1085 We rely on forget_cached_source_info being called appropriately
1086 to handle cases like the file being moved. */
1087 if (s
->fullname
== NULL
)
1089 scoped_fd fd
= open_source_file (s
);
1093 gdb::unique_xmalloc_ptr
<char> fullname
;
1095 /* rewrite_source_path would be applied by find_and_open_source, we
1096 should report the pathname where GDB tried to find the file. */
1098 if (SYMTAB_DIRNAME (s
) == NULL
|| IS_ABSOLUTE_PATH (s
->filename
))
1099 fullname
.reset (xstrdup (s
->filename
));
1101 fullname
.reset (concat (SYMTAB_DIRNAME (s
), SLASH_STRING
,
1102 s
->filename
, (char *) NULL
));
1104 s
->fullname
= rewrite_source_path (fullname
.get ()).release ();
1105 if (s
->fullname
== NULL
)
1106 s
->fullname
= fullname
.release ();
1113 /* See commentary in source.h. */
1116 symtab_to_filename_for_display (struct symtab
*symtab
)
1118 if (filename_display_string
== filename_display_basename
)
1119 return lbasename (symtab
->filename
);
1120 else if (filename_display_string
== filename_display_absolute
)
1121 return symtab_to_fullname (symtab
);
1122 else if (filename_display_string
== filename_display_relative
)
1123 return symtab
->filename
;
1125 internal_error (__FILE__
, __LINE__
, _("invalid filename_display_string"));
1128 /* Create and initialize the table S->line_charpos that records
1129 the positions of the lines in the source file, which is assumed
1130 to be open on descriptor DESC.
1131 All set S->nlines to the number of such lines. */
1134 find_source_lines (struct symtab
*s
, int desc
)
1139 int lines_allocated
= 1000;
1145 line_charpos
= XNEWVEC (int, lines_allocated
);
1146 if (fstat (desc
, &st
) < 0)
1147 perror_with_name (symtab_to_filename_for_display (s
));
1149 if (SYMTAB_OBJFILE (s
) != NULL
&& SYMTAB_OBJFILE (s
)->obfd
!= NULL
)
1150 mtime
= SYMTAB_OBJFILE (s
)->mtime
;
1152 mtime
= exec_bfd_mtime
;
1154 if (mtime
&& mtime
< st
.st_mtime
)
1155 warning (_("Source file is more recent than executable."));
1158 /* st_size might be a large type, but we only support source files whose
1159 size fits in an int. */
1160 size
= (int) st
.st_size
;
1162 /* Use the heap, not the stack, because this may be pretty large,
1163 and we may run into various kinds of limits on stack size. */
1164 gdb::def_vector
<char> data (size
);
1166 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1167 size
= myread (desc
, data
.data (), size
);
1169 perror_with_name (symtab_to_filename_for_display (s
));
1170 end
= data
.data () + size
;
1172 line_charpos
[0] = 0;
1177 /* A newline at the end does not start a new line. */
1180 if (nlines
== lines_allocated
)
1182 lines_allocated
*= 2;
1184 (int *) xrealloc ((char *) line_charpos
,
1185 sizeof (int) * lines_allocated
);
1187 line_charpos
[nlines
++] = p
- data
.data ();
1194 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1200 /* Get full pathname and line number positions for a symtab.
1201 Set *FULLNAME to actual name of the file as found by `openp',
1202 or to 0 if the file is not found. */
1205 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1207 scoped_fd desc
= open_source_file (s
);
1208 if (desc
.get () < 0)
1215 *fullname
= s
->fullname
;
1216 if (s
->line_charpos
== 0)
1217 find_source_lines (s
, desc
.get ());
1223 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1226 if (s
->line_charpos
== 0)
1227 get_filename_and_charpos (s
, (char **) NULL
);
1228 if (s
->fullname
== 0)
1230 if (line
> s
->nlines
)
1231 /* Don't index off the end of the line_charpos array. */
1233 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1234 mid_statement
, get_objfile_arch (SYMTAB_OBJFILE (s
)), pc
);
1236 current_source_line
= line
;
1237 current_source_symtab
= s
;
1238 clear_lines_listed_range ();
1243 /* Print source lines from the file of symtab S,
1244 starting with line number LINE and stopping before line number STOPLINE. */
1247 print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1248 print_source_lines_flags flags
)
1253 int nlines
= stopline
- line
;
1254 struct ui_out
*uiout
= current_uiout
;
1256 /* Regardless of whether we can open the file, set current_source_symtab. */
1257 current_source_symtab
= s
;
1258 current_source_line
= line
;
1259 first_line_listed
= line
;
1261 /* If printing of source lines is disabled, just print file and line
1263 if (uiout
->test_flags (ui_source_list
))
1265 /* Only prints "No such file or directory" once. */
1266 if ((s
!= last_source_visited
) || (!last_source_error
))
1268 last_source_visited
= s
;
1269 desc
= open_source_file (s
);
1270 if (desc
.get () < 0)
1272 last_source_error
= desc
.get ();
1278 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1284 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1290 if (!(flags
& PRINT_SOURCE_LINES_NOERROR
))
1292 const char *filename
= symtab_to_filename_for_display (s
);
1293 int len
= strlen (filename
) + 100;
1294 char *name
= (char *) alloca (len
);
1296 xsnprintf (name
, len
, "%d\t%s", line
, filename
);
1297 print_sys_errmsg (name
, errno
);
1301 uiout
->field_int ("line", line
);
1302 uiout
->text ("\tin ");
1304 /* CLI expects only the "file" field. TUI expects only the
1305 "fullname" field (and TUI does break if "file" is printed).
1306 MI expects both fields. ui_source_list is set only for CLI,
1308 if (uiout
->is_mi_like_p () || uiout
->test_flags (ui_source_list
))
1309 uiout
->field_string ("file", symtab_to_filename_for_display (s
),
1310 ui_out_style_kind::FILE);
1311 if (uiout
->is_mi_like_p () || !uiout
->test_flags (ui_source_list
))
1313 const char *s_fullname
= symtab_to_fullname (s
);
1314 char *local_fullname
;
1316 /* ui_out_field_string may free S_FULLNAME by calling
1317 open_source_file for it again. See e.g.,
1318 tui_field_string->tui_show_source. */
1319 local_fullname
= (char *) alloca (strlen (s_fullname
) + 1);
1320 strcpy (local_fullname
, s_fullname
);
1322 uiout
->field_string ("fullname", local_fullname
);
1331 last_source_error
= 0;
1333 /* If the user requested a sequence of lines that seems to go backward
1334 (from high to low line numbers) then we don't print anything.
1335 The use of '- 1' here instead of '<=' is currently critical, we rely
1336 on the undefined wrap around behaviour of 'int' for stopline. When
1337 the use has done: 'set listsize unlimited' then stopline can overflow
1338 and appear as MIN_INT. This is a long-standing bug that needs
1340 if (stopline
- 1 < line
)
1344 if (!g_source_cache
.get_source_lines (s
, line
, stopline
- 1, &lines
))
1345 error (_("Line number %d out of range; %s has %d lines."),
1346 line
, symtab_to_filename_for_display (s
), s
->nlines
);
1348 const char *iter
= lines
.c_str ();
1349 while (nlines
-- > 0)
1356 last_line_listed
= current_source_line
;
1357 if (flags
& PRINT_SOURCE_LINES_FILENAME
)
1359 uiout
->text (symtab_to_filename_for_display (s
));
1362 xsnprintf (buf
, sizeof (buf
), "%d\t", current_source_line
++);
1366 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r' && c
!= '\033')
1368 xsnprintf (buf
, sizeof (buf
), "^%c", c
+ 0100);
1375 /* Skip a \r character, but only before a \n. */
1377 printf_filtered ("^%c", c
+ 0100);
1381 xsnprintf (buf
, sizeof (buf
), "%c", c
);
1385 while (c
!= '\n' && (c
= *iter
++) != '\0');
1389 if (!lines
.empty() && lines
.back () != '\n')
1397 print_source_lines (struct symtab
*s
, int line
, int stopline
,
1398 print_source_lines_flags flags
)
1400 print_source_lines_base (s
, line
, stopline
, flags
);
1403 /* Print info on range of pc's in a specified line. */
1406 info_line_command (const char *arg
, int from_tty
)
1408 CORE_ADDR start_pc
, end_pc
;
1410 std::vector
<symtab_and_line
> decoded_sals
;
1411 symtab_and_line curr_sal
;
1412 gdb::array_view
<symtab_and_line
> sals
;
1416 curr_sal
.symtab
= current_source_symtab
;
1417 curr_sal
.pspace
= current_program_space
;
1418 if (last_line_listed
!= 0)
1419 curr_sal
.line
= last_line_listed
;
1421 curr_sal
.line
= current_source_line
;
1427 decoded_sals
= decode_line_with_last_displayed (arg
,
1428 DECODE_LINE_LIST_MODE
);
1429 sals
= decoded_sals
;
1434 /* C++ More than one line may have been specified, as when the user
1435 specifies an overloaded function name. Print info on them all. */
1436 for (const auto &sal
: sals
)
1438 if (sal
.pspace
!= current_program_space
)
1441 if (sal
.symtab
== 0)
1443 struct gdbarch
*gdbarch
= get_current_arch ();
1445 printf_filtered (_("No line number information available"));
1448 /* This is useful for "info line *0x7f34". If we can't tell the
1449 user about a source line, at least let them have the symbolic
1451 printf_filtered (" for address ");
1453 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1456 printf_filtered (".");
1457 printf_filtered ("\n");
1459 else if (sal
.line
> 0
1460 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1462 struct gdbarch
*gdbarch
1463 = get_objfile_arch (SYMTAB_OBJFILE (sal
.symtab
));
1465 if (start_pc
== end_pc
)
1467 printf_filtered ("Line %d of \"%s\"",
1469 symtab_to_filename_for_display (sal
.symtab
));
1471 printf_filtered (" is at address ");
1472 print_address (gdbarch
, start_pc
, gdb_stdout
);
1474 printf_filtered (" but contains no code.\n");
1478 printf_filtered ("Line %d of \"%s\"",
1480 symtab_to_filename_for_display (sal
.symtab
));
1482 printf_filtered (" starts at address ");
1483 print_address (gdbarch
, start_pc
, gdb_stdout
);
1485 printf_filtered (" and ends at ");
1486 print_address (gdbarch
, end_pc
, gdb_stdout
);
1487 printf_filtered (".\n");
1490 /* x/i should display this line's code. */
1491 set_next_address (gdbarch
, start_pc
);
1493 /* Repeating "info line" should do the following line. */
1494 last_line_listed
= sal
.line
+ 1;
1496 /* If this is the only line, show the source code. If it could
1497 not find the file, don't do anything special. */
1498 if (annotation_level
&& sals
.size () == 1)
1499 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1502 /* Is there any case in which we get here, and have an address
1503 which the user would want to see? If we have debugging symbols
1504 and no line numbers? */
1505 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1506 sal
.line
, symtab_to_filename_for_display (sal
.symtab
));
1510 /* Commands to search the source file for a regexp. */
1512 /* Helper for forward_search_command/reverse_search_command. FORWARD
1513 indicates direction: true for forward, false for
1514 backward/reverse. */
1517 search_command_helper (const char *regex
, int from_tty
, bool forward
)
1519 const char *msg
= re_comp (regex
);
1521 error (("%s"), msg
);
1523 if (current_source_symtab
== 0)
1524 select_source_symtab (0);
1526 scoped_fd desc
= open_source_file (current_source_symtab
);
1527 if (desc
.get () < 0)
1528 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1530 if (current_source_symtab
->line_charpos
== 0)
1531 find_source_lines (current_source_symtab
, desc
.get ());
1534 ? last_line_listed
+ 1
1535 : last_line_listed
- 1);
1537 if (line
< 1 || line
> current_source_symtab
->nlines
)
1538 error (_("Expression not found"));
1540 if (lseek (desc
.get (), current_source_symtab
->line_charpos
[line
- 1], 0)
1542 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1544 gdb_file_up stream
= desc
.to_file (FDOPEN_MODE
);
1545 clearerr (stream
.get ());
1547 gdb::def_vector
<char> buf
;
1554 int c
= fgetc (stream
.get ());
1561 while (c
!= '\n' && (c
= fgetc (stream
.get ())) >= 0);
1563 /* Remove the \r, if any, at the end of the line, otherwise
1564 regular expressions that end with $ or \n won't work. */
1565 size_t sz
= buf
.size ();
1566 if (sz
>= 2 && buf
[sz
- 2] == '\r')
1569 buf
.resize (sz
- 1);
1572 /* We now have a source line in buf, null terminate and match. */
1573 buf
.push_back ('\0');
1574 if (re_exec (buf
.data ()) > 0)
1577 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1578 set_internalvar_integer (lookup_internalvar ("_"), line
);
1579 current_source_line
= std::max (line
- lines_to_list
/ 2, 1);
1590 if (fseek (stream
.get (),
1591 current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1593 const char *filename
1594 = symtab_to_filename_for_display (current_source_symtab
);
1595 perror_with_name (filename
);
1600 printf_filtered (_("Expression not found\n"));
1604 forward_search_command (const char *regex
, int from_tty
)
1606 search_command_helper (regex
, from_tty
, true);
1610 reverse_search_command (const char *regex
, int from_tty
)
1612 search_command_helper (regex
, from_tty
, false);
1615 /* If the last character of PATH is a directory separator, then strip it. */
1618 strip_trailing_directory_separator (char *path
)
1620 const int last
= strlen (path
) - 1;
1623 return; /* No stripping is needed if PATH is the empty string. */
1625 if (IS_DIR_SEPARATOR (path
[last
]))
1629 /* Return the path substitution rule that matches FROM.
1630 Return NULL if no rule matches. */
1632 static struct substitute_path_rule
*
1633 find_substitute_path_rule (const char *from
)
1635 struct substitute_path_rule
*rule
= substitute_path_rules
;
1637 while (rule
!= NULL
)
1639 if (FILENAME_CMP (rule
->from
, from
) == 0)
1647 /* Add a new substitute-path rule at the end of the current list of rules.
1648 The new rule will replace FROM into TO. */
1651 add_substitute_path_rule (char *from
, char *to
)
1653 struct substitute_path_rule
*rule
;
1654 struct substitute_path_rule
*new_rule
= XNEW (struct substitute_path_rule
);
1656 new_rule
->from
= xstrdup (from
);
1657 new_rule
->to
= xstrdup (to
);
1658 new_rule
->next
= NULL
;
1660 /* If the list of rules are empty, then insert the new rule
1661 at the head of the list. */
1663 if (substitute_path_rules
== NULL
)
1665 substitute_path_rules
= new_rule
;
1669 /* Otherwise, skip to the last rule in our list and then append
1672 rule
= substitute_path_rules
;
1673 while (rule
->next
!= NULL
)
1676 rule
->next
= new_rule
;
1679 /* Remove the given source path substitution rule from the current list
1680 of rules. The memory allocated for that rule is also deallocated. */
1683 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1685 if (rule
== substitute_path_rules
)
1686 substitute_path_rules
= rule
->next
;
1689 struct substitute_path_rule
*prev
= substitute_path_rules
;
1691 while (prev
!= NULL
&& prev
->next
!= rule
)
1694 gdb_assert (prev
!= NULL
);
1696 prev
->next
= rule
->next
;
1704 /* Implement the "show substitute-path" command. */
1707 show_substitute_path_command (const char *args
, int from_tty
)
1709 struct substitute_path_rule
*rule
= substitute_path_rules
;
1712 gdb_argv
argv (args
);
1714 /* We expect zero or one argument. */
1716 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1717 error (_("Too many arguments in command"));
1719 if (argv
!= NULL
&& argv
[0] != NULL
)
1722 /* Print the substitution rules. */
1726 (_("Source path substitution rule matching `%s':\n"), from
);
1728 printf_filtered (_("List of all source path substitution rules:\n"));
1730 while (rule
!= NULL
)
1732 if (from
== NULL
|| substitute_path_rule_matches (rule
, from
) != 0)
1733 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1738 /* Implement the "unset substitute-path" command. */
1741 unset_substitute_path_command (const char *args
, int from_tty
)
1743 struct substitute_path_rule
*rule
= substitute_path_rules
;
1744 gdb_argv
argv (args
);
1748 /* This function takes either 0 or 1 argument. */
1750 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1751 error (_("Incorrect usage, too many arguments in command"));
1753 if (argv
!= NULL
&& argv
[0] != NULL
)
1756 /* If the user asked for all the rules to be deleted, ask him
1757 to confirm and give him a chance to abort before the action
1761 && !query (_("Delete all source path substitution rules? ")))
1762 error (_("Canceled"));
1764 /* Delete the rule matching the argument. No argument means that
1765 all rules should be deleted. */
1767 while (rule
!= NULL
)
1769 struct substitute_path_rule
*next
= rule
->next
;
1771 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1773 delete_substitute_path_rule (rule
);
1780 /* If the user asked for a specific rule to be deleted but
1781 we could not find it, then report an error. */
1783 if (from
!= NULL
&& !rule_found
)
1784 error (_("No substitution rule defined for `%s'"), from
);
1786 forget_cached_source_info ();
1789 /* Add a new source path substitution rule. */
1792 set_substitute_path_command (const char *args
, int from_tty
)
1794 struct substitute_path_rule
*rule
;
1796 gdb_argv
argv (args
);
1798 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1799 error (_("Incorrect usage, too few arguments in command"));
1801 if (argv
[2] != NULL
)
1802 error (_("Incorrect usage, too many arguments in command"));
1804 if (*(argv
[0]) == '\0')
1805 error (_("First argument must be at least one character long"));
1807 /* Strip any trailing directory separator character in either FROM
1808 or TO. The substitution rule already implicitly contains them. */
1809 strip_trailing_directory_separator (argv
[0]);
1810 strip_trailing_directory_separator (argv
[1]);
1812 /* If a rule with the same "from" was previously defined, then
1813 delete it. This new rule replaces it. */
1815 rule
= find_substitute_path_rule (argv
[0]);
1817 delete_substitute_path_rule (rule
);
1819 /* Insert the new substitution rule. */
1821 add_substitute_path_rule (argv
[0], argv
[1]);
1822 forget_cached_source_info ();
1827 _initialize_source (void)
1829 struct cmd_list_element
*c
;
1831 current_source_symtab
= 0;
1832 init_source_path ();
1834 /* The intention is to use POSIX Basic Regular Expressions.
1835 Always use the GNU regex routine for consistency across all hosts.
1836 Our current GNU regex.c does not have all the POSIX features, so this is
1837 just an approximation. */
1838 re_set_syntax (RE_SYNTAX_GREP
);
1840 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1841 Add directory DIR to beginning of search path for source files.\n\
1842 Forget cached info on source file locations and line positions.\n\
1843 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1844 directory in which the source file was compiled into object code.\n\
1845 With no argument, reset the search path to $cdir:$cwd, the default."),
1849 add_com_alias ("use", "directory", class_files
, 0);
1851 set_cmd_completer (c
, filename_completer
);
1853 add_setshow_optional_filename_cmd ("directories",
1857 Set the search path for finding source files."),
1859 Show the search path for finding source files."),
1861 $cwd in the path means the current working directory.\n\
1862 $cdir in the path means the compilation directory of the source file.\n\
1863 GDB ensures the search path always ends with $cdir:$cwd by\n\
1864 appending these directories if necessary.\n\
1865 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1866 set_directories_command
,
1867 show_directories_command
,
1868 &setlist
, &showlist
);
1870 add_info ("source", info_source_command
,
1871 _("Information about the current source file."));
1873 add_info ("line", info_line_command
, _("\
1874 Core addresses of the code for a source line.\n\
1875 Line can be specified as\n\
1876 LINENUM, to list around that line in current file,\n\
1877 FILE:LINENUM, to list around that line in that file,\n\
1878 FUNCTION, to list around beginning of that function,\n\
1879 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1880 Default is to describe the last source line that was listed.\n\n\
1881 This sets the default address for \"x\" to the line's first instruction\n\
1882 so that \"x/i\" suffices to start examining the machine code.\n\
1883 The address is also stored as the value of \"$_\"."));
1885 add_com ("forward-search", class_files
, forward_search_command
, _("\
1886 Search for regular expression (see regex(3)) from last line listed.\n\
1887 The matching line number is also stored as the value of \"$_\"."));
1888 add_com_alias ("search", "forward-search", class_files
, 0);
1889 add_com_alias ("fo", "forward-search", class_files
, 1);
1891 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1892 Search backward for regular expression (see regex(3)) from last line listed.\n\
1893 The matching line number is also stored as the value of \"$_\"."));
1894 add_com_alias ("rev", "reverse-search", class_files
, 1);
1896 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
1897 Set number of source lines gdb will list by default."), _("\
1898 Show number of source lines gdb will list by default."), _("\
1899 Use this to choose how many source lines the \"list\" displays (unless\n\
1900 the \"list\" argument explicitly specifies some other number).\n\
1901 A value of \"unlimited\", or zero, means there's no limit."),
1904 &setlist
, &showlist
);
1906 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
1908 Usage: set substitute-path FROM TO\n\
1909 Add a substitution rule replacing FROM into TO in source file names.\n\
1910 If a substitution rule was previously set for FROM, the old rule\n\
1911 is replaced by the new one."),
1914 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
1916 Usage: unset substitute-path [FROM]\n\
1917 Delete the rule for substituting FROM in source file names. If FROM\n\
1918 is not specified, all substituting rules are deleted.\n\
1919 If the debugger cannot find a rule for FROM, it will display a warning."),
1922 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
1924 Usage: show substitute-path [FROM]\n\
1925 Print the rule for substituting FROM in source file names. If FROM\n\
1926 is not specified, print all substitution rules."),
1929 add_setshow_enum_cmd ("filename-display", class_files
,
1930 filename_display_kind_names
,
1931 &filename_display_string
, _("\
1932 Set how to display filenames."), _("\
1933 Show how to display filenames."), _("\
1934 filename-display can be:\n\
1935 basename - display only basename of a filename\n\
1936 relative - display a filename relative to the compilation directory\n\
1937 absolute - display an absolute filename\n\
1938 By default, relative filenames are displayed."),
1940 show_filename_display_string
,
1941 &setlist
, &showlist
);