1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1986-2013 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 "gdb_assert.h"
31 #include <sys/types.h>
32 #include "gdb_string.h"
36 #include "gdb_regex.h"
42 #include "filenames.h" /* for DOSish file names */
43 #include "completer.h"
45 #include "readline/readline.h"
50 #define OPEN_MODE (O_RDONLY | O_BINARY)
51 #define FDOPEN_MODE FOPEN_RB
53 /* Prototypes for exported functions. */
55 void _initialize_source (void);
57 /* Prototypes for local functions. */
59 static int get_filename_and_charpos (struct symtab
*, char **);
61 static void reverse_search_command (char *, int);
63 static void forward_search_command (char *, int);
65 static void line_info (char *, int);
67 static void source_info (char *, int);
69 /* Path of directories to search for source files.
70 Same format as the PATH environment variable's value. */
74 /* Support for source path substitution commands. */
76 struct substitute_path_rule
80 struct substitute_path_rule
*next
;
83 static struct substitute_path_rule
*substitute_path_rules
= NULL
;
85 /* Symtab of default file for listing lines of. */
87 static struct symtab
*current_source_symtab
;
89 /* Default next line to list. */
91 static int current_source_line
;
93 static struct program_space
*current_source_pspace
;
95 /* Default number of lines to print with commands like "list".
96 This is based on guessing how many long (i.e. more than chars_per_line
97 characters) lines there will be. To be completely correct, "list"
98 and friends should be rewritten to count characters and see where
99 things are wrapping, but that would be a fair amount of work. */
101 int lines_to_list
= 10;
103 show_lines_to_list (struct ui_file
*file
, int from_tty
,
104 struct cmd_list_element
*c
, const char *value
)
106 fprintf_filtered (file
,
107 _("Number of source lines gdb "
108 "will list by default is %s.\n"),
112 /* Line number of last line printed. Default for various commands.
113 current_source_line is usually, but not always, the same as this. */
115 static int last_line_listed
;
117 /* First line number listed by last listing command. */
119 static int first_line_listed
;
121 /* Saves the name of the last source file visited and a possible error code.
122 Used to prevent repeating annoying "No such file or directories" msgs. */
124 static struct symtab
*last_source_visited
= NULL
;
125 static int last_source_error
= 0;
127 /* Return the first line listed by print_source_lines.
128 Used by command interpreters to request listing from
132 get_first_line_listed (void)
134 return first_line_listed
;
137 /* Return the default number of lines to print with commands like the
138 cli "list". The caller of print_source_lines must use this to
139 calculate the end line and use it in the call to print_source_lines
140 as it does not automatically use this value. */
143 get_lines_to_list (void)
145 return lines_to_list
;
148 /* Return the current source file for listing and next line to list.
149 NOTE: The returned sal pc and end fields are not valid. */
151 struct symtab_and_line
152 get_current_source_symtab_and_line (void)
154 struct symtab_and_line cursal
= { 0 };
156 cursal
.pspace
= current_source_pspace
;
157 cursal
.symtab
= current_source_symtab
;
158 cursal
.line
= current_source_line
;
165 /* If the current source file for listing is not set, try and get a default.
166 Usually called before get_current_source_symtab_and_line() is called.
167 It may err out if a default cannot be determined.
168 We must be cautious about where it is called, as it can recurse as the
169 process of determining a new default may call the caller!
170 Use get_current_source_symtab_and_line only to get whatever
171 we have without erroring out or trying to get a default. */
174 set_default_source_symtab_and_line (void)
176 if (!have_full_symbols () && !have_partial_symbols ())
177 error (_("No symbol table is loaded. Use the \"file\" command."));
179 /* Pull in a current source symtab if necessary. */
180 if (current_source_symtab
== 0)
181 select_source_symtab (0);
184 /* Return the current default file for listing and next line to list
185 (the returned sal pc and end fields are not valid.)
186 and set the current default to whatever is in SAL.
187 NOTE: The returned sal pc and end fields are not valid. */
189 struct symtab_and_line
190 set_current_source_symtab_and_line (const struct symtab_and_line
*sal
)
192 struct symtab_and_line cursal
= { 0 };
194 cursal
.pspace
= current_source_pspace
;
195 cursal
.symtab
= current_source_symtab
;
196 cursal
.line
= current_source_line
;
200 current_source_pspace
= sal
->pspace
;
201 current_source_symtab
= sal
->symtab
;
202 current_source_line
= sal
->line
;
207 /* Reset any information stored about a default file and line to print. */
210 clear_current_source_symtab_and_line (void)
212 current_source_symtab
= 0;
213 current_source_line
= 0;
216 /* Set the source file default for the "list" command to be S.
218 If S is NULL, and we don't have a default, find one. This
219 should only be called when the user actually tries to use the
220 default, since we produce an error if we can't find a reasonable
221 default. Also, since this can cause symbols to be read, doing it
222 before we need to would make things slower than necessary. */
225 select_source_symtab (struct symtab
*s
)
227 struct symtabs_and_lines sals
;
228 struct symtab_and_line sal
;
233 current_source_symtab
= s
;
234 current_source_line
= 1;
235 current_source_pspace
= SYMTAB_PSPACE (s
);
239 if (current_source_symtab
)
242 /* Make the default place to list be the function `main'
244 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0))
246 sals
= decode_line_with_current_source (main_name (),
247 DECODE_LINE_FUNFIRSTLINE
);
250 current_source_pspace
= sal
.pspace
;
251 current_source_symtab
= sal
.symtab
;
252 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
253 if (current_source_symtab
)
257 /* Alright; find the last file in the symtab list (ignoring .h's
258 and namespace symtabs). */
260 current_source_line
= 1;
264 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
266 const char *name
= s
->filename
;
267 int len
= strlen (name
);
269 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
270 || strcmp (name
, "<<C++-namespaces>>") == 0)))
272 current_source_pspace
= current_program_space
;
273 current_source_symtab
= s
;
278 if (current_source_symtab
)
284 s
= ofp
->sf
->qf
->find_last_source_symtab (ofp
);
286 current_source_symtab
= s
;
288 if (current_source_symtab
)
291 error (_("Can't find a default source file"));
294 /* Handler for "set directories path-list" command.
295 "set dir mumble" doesn't prepend paths, it resets the entire
296 path list. The theory is that set(show(dir)) should be a no-op. */
299 set_directories_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
301 /* This is the value that was set.
302 It needs to be processed to maintain $cdir:$cwd and remove dups. */
303 char *set_path
= source_path
;
305 /* We preserve the invariant that $cdir:$cwd begins life at the end of
306 the list by calling init_source_path. If they appear earlier in
307 SET_PATH then mod_path will move them appropriately.
308 mod_path will also remove duplicates. */
310 if (*set_path
!= '\0')
311 mod_path (set_path
, &source_path
);
316 /* Print the list of source directories.
317 This is used by the "ld" command, so it has the signature of a command
321 show_directories_1 (char *ignore
, int from_tty
)
323 puts_filtered ("Source directories searched: ");
324 puts_filtered (source_path
);
325 puts_filtered ("\n");
328 /* Handler for "show directories" command. */
331 show_directories_command (struct ui_file
*file
, int from_tty
,
332 struct cmd_list_element
*c
, const char *value
)
334 show_directories_1 (NULL
, from_tty
);
337 /* Forget line positions and file names for the symtabs in a
338 particular objfile. */
341 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
345 ALL_OBJFILE_SYMTABS (objfile
, s
)
347 if (s
->line_charpos
!= NULL
)
349 xfree (s
->line_charpos
);
350 s
->line_charpos
= NULL
;
352 if (s
->fullname
!= NULL
)
360 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
363 /* Forget what we learned about line positions in source files, and
364 which directories contain them; must check again now since files
365 may be found in a different directory now. */
368 forget_cached_source_info (void)
370 struct program_space
*pspace
;
371 struct objfile
*objfile
;
374 ALL_PSPACE_OBJFILES (pspace
, objfile
)
376 forget_cached_source_info_for_objfile (objfile
);
379 last_source_visited
= NULL
;
383 init_source_path (void)
387 xsnprintf (buf
, sizeof (buf
), "$cdir%c$cwd", DIRNAME_SEPARATOR
);
388 source_path
= xstrdup (buf
);
389 forget_cached_source_info ();
392 /* Add zero or more directories to the front of the source path. */
395 directory_command (char *dirname
, int from_tty
)
398 /* FIXME, this goes to "delete dir"... */
401 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
409 mod_path (dirname
, &source_path
);
410 forget_cached_source_info ();
413 show_directories_1 ((char *) 0, from_tty
);
416 /* Add a path given with the -d command line switch.
417 This will not be quoted so we must not treat spaces as separators. */
420 directory_switch (char *dirname
, int from_tty
)
422 add_path (dirname
, &source_path
, 0);
425 /* Add zero or more directories to the front of an arbitrary path. */
428 mod_path (char *dirname
, char **which_path
)
430 add_path (dirname
, which_path
, 1);
433 /* Workhorse of mod_path. Takes an extra argument to determine
434 if dirname should be parsed for separators that indicate multiple
435 directories. This allows for interfaces that pre-parse the dirname
436 and allow specification of traditional separator characters such
440 add_path (char *dirname
, char **which_path
, int parse_separators
)
442 char *old
= *which_path
;
444 VEC (char_ptr
) *dir_vec
= NULL
;
445 struct cleanup
*back_to
;
452 if (parse_separators
)
454 char **argv
, **argvp
;
456 /* This will properly parse the space and tab separators
457 and any quotes that may exist. */
458 argv
= gdb_buildargv (dirname
);
460 for (argvp
= argv
; *argvp
; argvp
++)
461 dirnames_to_char_ptr_vec_append (&dir_vec
, *argvp
);
466 VEC_safe_push (char_ptr
, dir_vec
, xstrdup (dirname
));
467 back_to
= make_cleanup_free_char_ptr_vec (dir_vec
);
469 for (ix
= 0; VEC_iterate (char_ptr
, dir_vec
, ix
, name
); ++ix
)
474 /* Spaces and tabs will have been removed by buildargv().
475 NAME is the start of the directory.
476 P is the '\0' following the end. */
477 p
= name
+ strlen (name
);
479 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
480 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
481 /* On MS-DOS and MS-Windows, h:\ is different from h: */
482 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
484 && IS_DIR_SEPARATOR (p
[-1]))
485 /* Sigh. "foo/" => "foo" */
489 while (p
> name
&& p
[-1] == '.')
493 /* "." => getwd (). */
494 name
= current_directory
;
497 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
507 /* "...foo/." => "...foo". */
518 name
= tilde_expand (name
);
519 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
520 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
521 name
= concat (name
, ".", (char *)NULL
);
523 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
524 name
= concat (current_directory
, SLASH_STRING
, name
, (char *)NULL
);
526 name
= savestring (name
, p
- name
);
527 make_cleanup (xfree
, name
);
529 /* Unless it's a variable, check existence. */
532 /* These are warnings, not errors, since we don't want a
533 non-existent directory in a .gdbinit file to stop processing
534 of the .gdbinit file.
536 Whether they get added to the path is more debatable. Current
537 answer is yes, in case the user wants to go make the directory
538 or whatever. If the directory continues to not exist/not be
539 a directory/etc, then having them in the path should be
541 if (stat (name
, &st
) < 0)
543 int save_errno
= errno
;
545 fprintf_unfiltered (gdb_stderr
, "Warning: ");
546 print_sys_errmsg (name
, save_errno
);
548 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
549 warning (_("%s is not a directory."), name
);
554 unsigned int len
= strlen (name
);
558 /* FIXME: we should use realpath() or its work-alike
559 before comparing. Then all the code above which
560 removes excess slashes and dots could simply go away. */
561 if (!filename_cmp (p
, name
))
563 /* Found it in the search path, remove old copy. */
565 p
--; /* Back over leading separator. */
566 if (prefix
> p
- *which_path
)
567 goto skip_dup
; /* Same dir twice in one cmd. */
568 memmove (p
, &p
[len
+ 1], strlen (&p
[len
+ 1]) + 1); /* Copy from next \0 or : */
571 tinybuf
[0] = DIRNAME_SEPARATOR
;
574 /* If we have already tacked on a name(s) in this command,
575 be sure they stay on the front as we tack on some
583 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
585 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
586 prefix
= strlen (temp
);
591 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
593 prefix
= strlen (name
);
602 do_cleanups (back_to
);
607 source_info (char *ignore
, int from_tty
)
609 struct symtab
*s
= current_source_symtab
;
613 printf_filtered (_("No current source file.\n"));
616 printf_filtered (_("Current source file is %s\n"), s
->filename
);
618 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
620 printf_filtered (_("Located in %s\n"), s
->fullname
);
622 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
623 s
->nlines
== 1 ? "" : "s");
625 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
626 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
627 printf_filtered (_("%s preprocessor macro info.\n"),
628 s
->macro_table
? "Includes" : "Does not include");
632 /* Return True if the file NAME exists and is a regular file. */
634 is_regular_file (const char *name
)
637 const int status
= stat (name
, &st
);
639 /* Stat should never fail except when the file does not exist.
640 If stat fails, analyze the source of error and return True
641 unless the file does not exist, to avoid returning false results
642 on obscure systems where stat does not work as expected. */
645 return (errno
!= ENOENT
);
647 return S_ISREG (st
.st_mode
);
650 /* Open a file named STRING, searching path PATH (dir names sep by some char)
651 using mode MODE in the calls to open. You cannot use this function to
652 create files (O_CREAT).
654 OPTS specifies the function behaviour in specific cases.
656 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
657 (ie pretend the first element of PATH is "."). This also indicates
658 that a slash in STRING disables searching of the path (this is
659 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
660 get that particular version of foo or an error message).
662 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
663 searched in path (we usually want this for source files but not for
666 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
667 the actual file opened (this string will always start with a "/"). We
668 have to take special pains to avoid doubling the "/" between the directory
669 and the file, sigh! Emacs gets confuzzed by this when we print the
672 If a file is found, return the descriptor.
673 Otherwise, return -1, with errno set for the last name we tried to open. */
675 /* >>>> This should only allow files of certain types,
676 >>>> eg executable, non-directory. */
678 openp (const char *path
, int opts
, const char *string
,
679 int mode
, char **filename_opened
)
684 VEC (char_ptr
) *dir_vec
;
685 struct cleanup
*back_to
;
689 /* The open syscall MODE parameter is not specified. */
690 gdb_assert ((mode
& O_CREAT
) == 0);
691 gdb_assert (string
!= NULL
);
693 /* A file with an empty name cannot possibly exist. Report a failure
694 without further checking.
696 This is an optimization which also defends us against buggy
697 implementations of the "stat" function. For instance, we have
698 noticed that a MinGW debugger built on Windows XP 32bits crashes
699 when the debugger is started with an empty argument. */
700 if (string
[0] == '\0')
711 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
715 if (is_regular_file (string
))
717 filename
= alloca (strlen (string
) + 1);
718 strcpy (filename
, string
);
719 fd
= open (filename
, mode
);
729 if (!(opts
& OPF_SEARCH_IN_PATH
))
730 for (i
= 0; string
[i
]; i
++)
731 if (IS_DIR_SEPARATOR (string
[i
]))
735 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
736 if (HAS_DRIVE_SPEC (string
))
737 string
= STRIP_DRIVE_SPEC (string
);
739 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
740 while (IS_DIR_SEPARATOR(string
[0]))
744 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
747 alloclen
= strlen (path
) + strlen (string
) + 2;
748 filename
= alloca (alloclen
);
751 dir_vec
= dirnames_to_char_ptr_vec (path
);
752 back_to
= make_cleanup_free_char_ptr_vec (dir_vec
);
754 for (ix
= 0; VEC_iterate (char_ptr
, dir_vec
, ix
, dir
); ++ix
)
756 size_t len
= strlen (dir
);
758 if (strcmp (dir
, "$cwd") == 0)
760 /* Name is $cwd -- insert current directory name instead. */
763 /* First, realloc the filename buffer if too short. */
764 len
= strlen (current_directory
);
765 newlen
= len
+ strlen (string
) + 2;
766 if (newlen
> alloclen
)
769 filename
= alloca (alloclen
);
771 strcpy (filename
, current_directory
);
773 else if (strchr(dir
, '~'))
775 /* See whether we need to expand the tilde. */
777 char *tilde_expanded
;
779 tilde_expanded
= tilde_expand (dir
);
781 /* First, realloc the filename buffer if too short. */
782 len
= strlen (tilde_expanded
);
783 newlen
= len
+ strlen (string
) + 2;
784 if (newlen
> alloclen
)
787 filename
= alloca (alloclen
);
789 strcpy (filename
, tilde_expanded
);
790 xfree (tilde_expanded
);
794 /* Normal file name in path -- just use it. */
795 strcpy (filename
, dir
);
797 /* Don't search $cdir. It's also a magic path like $cwd, but we
798 don't have enough information to expand it. The user *could*
799 have an actual directory named '$cdir' but handling that would
800 be confusing, it would mean different things in different
801 contexts. If the user really has '$cdir' one can use './$cdir'.
802 We can get $cdir when loading scripts. When loading source files
803 $cdir must have already been expanded to the correct value. */
804 if (strcmp (dir
, "$cdir") == 0)
808 /* Remove trailing slashes. */
809 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
812 strcat (filename
+ len
, SLASH_STRING
);
813 strcat (filename
, string
);
815 if (is_regular_file (filename
))
817 fd
= open (filename
, mode
);
823 do_cleanups (back_to
);
828 /* If a file was opened, canonicalize its filename. Use xfullpath
829 rather than gdb_realpath to avoid resolving the basename part
830 of filenames when the associated file is a symbolic link. This
831 fixes a potential inconsistency between the filenames known to
832 GDB and the filenames it prints in the annotations. */
834 *filename_opened
= NULL
;
835 else if (IS_ABSOLUTE_PATH (filename
))
836 *filename_opened
= xfullpath (filename
);
839 /* Beware the // my son, the Emacs barfs, the botch that catch... */
841 char *f
= concat (current_directory
,
842 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
844 filename
, (char *)NULL
);
846 *filename_opened
= xfullpath (f
);
855 /* This is essentially a convenience, for clients that want the behaviour
856 of openp, using source_path, but that really don't want the file to be
857 opened but want instead just to know what the full pathname is (as
858 qualified against source_path).
860 The current working directory is searched first.
862 If the file was found, this function returns 1, and FULL_PATHNAME is
863 set to the fully-qualified pathname.
865 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
867 source_full_path_of (const char *filename
, char **full_pathname
)
871 fd
= openp (source_path
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
872 O_RDONLY
, full_pathname
);
875 *full_pathname
= NULL
;
883 /* Return non-zero if RULE matches PATH, that is if the rule can be
887 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
890 const int from_len
= strlen (rule
->from
);
891 const int path_len
= strlen (path
);
894 if (path_len
< from_len
)
897 /* The substitution rules are anchored at the start of the path,
898 so the path should start with rule->from. There is no filename
899 comparison routine, so we need to extract the first FROM_LEN
900 characters from PATH first and use that to do the comparison. */
902 path_start
= alloca (from_len
+ 1);
903 strncpy (path_start
, path
, from_len
);
904 path_start
[from_len
] = '\0';
906 if (FILENAME_CMP (path_start
, rule
->from
) != 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. This new path must
935 be deallocated afterwards.
937 Return NULL if no substitution rule was specified by the user,
938 or if no rule applied to the given PATH. */
941 rewrite_source_path (const char *path
)
943 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
950 from_len
= strlen (rule
->from
);
952 /* Compute the rewritten path and return it. */
955 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
956 strcpy (new_path
, rule
->to
);
957 strcat (new_path
, path
+ from_len
);
963 find_and_open_source (const char *filename
,
967 char *path
= source_path
;
971 /* Quick way out if we already know its full name. */
975 /* The user may have requested that source paths be rewritten
976 according to substitution rules he provided. If a substitution
977 rule applies to this path, then apply it. */
978 char *rewritten_fullname
= rewrite_source_path (*fullname
);
980 if (rewritten_fullname
!= NULL
)
983 *fullname
= rewritten_fullname
;
986 result
= open (*fullname
, OPEN_MODE
);
989 /* Call xfullpath here to be consistent with openp
990 which we use below. */
991 char *lpath
= xfullpath (*fullname
);
998 /* Didn't work -- free old one, try again. */
1003 if (dirname
!= NULL
)
1005 /* If necessary, rewrite the compilation directory name according
1006 to the source path substitution rules specified by the user. */
1008 char *rewritten_dirname
= rewrite_source_path (dirname
);
1010 if (rewritten_dirname
!= NULL
)
1012 make_cleanup (xfree
, rewritten_dirname
);
1013 dirname
= rewritten_dirname
;
1016 /* Replace a path entry of $cdir with the compilation directory
1019 /* We cast strstr's result in case an ANSIhole has made it const,
1020 which produces a "required warning" when assigned to a nonconst. */
1021 p
= (char *) strstr (source_path
, "$cdir");
1022 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1023 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1028 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1029 len
= p
- source_path
;
1030 strncpy (path
, source_path
, len
); /* Before $cdir */
1031 strcpy (path
+ len
, dirname
); /* new stuff */
1032 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1037 if (IS_ABSOLUTE_PATH (filename
))
1039 /* If filename is absolute path, try the source path
1040 substitution on it. */
1041 char *rewritten_filename
= rewrite_source_path (filename
);
1043 if (rewritten_filename
!= NULL
)
1045 make_cleanup (xfree
, rewritten_filename
);
1046 filename
= rewritten_filename
;
1050 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, fullname
);
1053 /* Didn't work. Try using just the basename. */
1054 p
= lbasename (filename
);
1056 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, fullname
);
1062 /* Open a source file given a symtab S. Returns a file descriptor or
1063 negative number for error.
1065 This function is a convience function to find_and_open_source. */
1068 open_source_file (struct symtab
*s
)
1073 return find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1076 /* Finds the fullname that a symtab represents.
1078 This functions finds the fullname and saves it in s->fullname.
1079 It will also return the value.
1081 If this function fails to find the file that this symtab represents,
1082 the expected fullname is used. Therefore the files does not have to
1086 symtab_to_fullname (struct symtab
*s
)
1088 /* Use cached copy if we have it.
1089 We rely on forget_cached_source_info being called appropriately
1090 to handle cases like the file being moved. */
1091 if (s
->fullname
== NULL
)
1093 int fd
= find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1100 struct cleanup
*back_to
;
1102 /* rewrite_source_path would be applied by find_and_open_source, we
1103 should report the pathname where GDB tried to find the file. */
1105 if (s
->dirname
== NULL
|| IS_ABSOLUTE_PATH (s
->filename
))
1106 fullname
= xstrdup (s
->filename
);
1108 fullname
= concat (s
->dirname
, SLASH_STRING
, s
->filename
, NULL
);
1110 back_to
= make_cleanup (xfree
, fullname
);
1111 s
->fullname
= rewrite_source_path (fullname
);
1112 if (s
->fullname
== NULL
)
1113 s
->fullname
= xstrdup (fullname
);
1114 do_cleanups (back_to
);
1121 /* Create and initialize the table S->line_charpos that records
1122 the positions of the lines in the source file, which is assumed
1123 to be open on descriptor DESC.
1124 All set S->nlines to the number of such lines. */
1127 find_source_lines (struct symtab
*s
, int desc
)
1130 char *data
, *p
, *end
;
1132 int lines_allocated
= 1000;
1138 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
1139 if (fstat (desc
, &st
) < 0)
1140 perror_with_name (s
->filename
);
1142 if (s
->objfile
&& s
->objfile
->obfd
)
1143 mtime
= s
->objfile
->mtime
;
1145 mtime
= exec_bfd_mtime
;
1147 if (mtime
&& mtime
< st
.st_mtime
)
1148 warning (_("Source file is more recent than executable."));
1151 struct cleanup
*old_cleanups
;
1153 /* st_size might be a large type, but we only support source files whose
1154 size fits in an int. */
1155 size
= (int) st
.st_size
;
1157 /* Use malloc, not alloca, because this may be pretty large, and we may
1158 run into various kinds of limits on stack size. */
1159 data
= (char *) xmalloc (size
);
1160 old_cleanups
= make_cleanup (xfree
, data
);
1162 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1163 size
= myread (desc
, data
, size
);
1165 perror_with_name (s
->filename
);
1168 line_charpos
[0] = 0;
1173 /* A newline at the end does not start a new line. */
1176 if (nlines
== lines_allocated
)
1178 lines_allocated
*= 2;
1180 (int *) xrealloc ((char *) line_charpos
,
1181 sizeof (int) * lines_allocated
);
1183 line_charpos
[nlines
++] = p
- data
;
1186 do_cleanups (old_cleanups
);
1191 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1197 /* Get full pathname and line number positions for a symtab.
1198 Return nonzero if line numbers may have changed.
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 int desc
, linenums_changed
= 0;
1206 struct cleanup
*cleanups
;
1208 desc
= open_source_file (s
);
1215 cleanups
= make_cleanup_close (desc
);
1217 *fullname
= s
->fullname
;
1218 if (s
->line_charpos
== 0)
1219 linenums_changed
= 1;
1220 if (linenums_changed
)
1221 find_source_lines (s
, desc
);
1222 do_cleanups (cleanups
);
1223 return linenums_changed
;
1226 /* Print text describing the full name of the source file S
1227 and the line number LINE and its corresponding character position.
1228 The text starts with two Ctrl-z so that the Emacs-GDB interface
1231 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1233 Return 1 if successful, 0 if could not find the file. */
1236 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1239 if (s
->line_charpos
== 0)
1240 get_filename_and_charpos (s
, (char **) NULL
);
1241 if (s
->fullname
== 0)
1243 if (line
> s
->nlines
)
1244 /* Don't index off the end of the line_charpos array. */
1246 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1247 mid_statement
, get_objfile_arch (s
->objfile
), pc
);
1249 current_source_line
= line
;
1250 first_line_listed
= line
;
1251 last_line_listed
= line
;
1252 current_source_symtab
= s
;
1257 /* Print source lines from the file of symtab S,
1258 starting with line number LINE and stopping before line number STOPLINE. */
1261 print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1262 enum print_source_lines_flags flags
)
1268 int nlines
= stopline
- line
;
1269 struct cleanup
*cleanup
;
1270 struct ui_out
*uiout
= current_uiout
;
1272 /* Regardless of whether we can open the file, set current_source_symtab. */
1273 current_source_symtab
= s
;
1274 current_source_line
= line
;
1275 first_line_listed
= line
;
1277 /* If printing of source lines is disabled, just print file and line
1279 if (ui_out_test_flags (uiout
, ui_source_list
))
1281 /* Only prints "No such file or directory" once. */
1282 if ((s
!= last_source_visited
) || (!last_source_error
))
1284 last_source_visited
= s
;
1285 desc
= open_source_file (s
);
1289 desc
= last_source_error
;
1290 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1295 desc
= last_source_error
;
1296 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1300 if (desc
< 0 || noprint
)
1302 last_source_error
= desc
;
1304 if (!(flags
& PRINT_SOURCE_LINES_NOERROR
))
1306 int len
= strlen (s
->filename
) + 100;
1307 char *name
= alloca (len
);
1309 xsnprintf (name
, len
, "%d\t%s", line
, s
->filename
);
1310 print_sys_errmsg (name
, errno
);
1314 ui_out_field_int (uiout
, "line", line
);
1315 ui_out_text (uiout
, "\tin ");
1316 ui_out_field_string (uiout
, "file", s
->filename
);
1317 if (ui_out_is_mi_like_p (uiout
))
1319 const char *fullname
= symtab_to_fullname (s
);
1321 ui_out_field_string (uiout
, "fullname", fullname
);
1323 ui_out_text (uiout
, "\n");
1329 last_source_error
= 0;
1331 if (s
->line_charpos
== 0)
1332 find_source_lines (s
, desc
);
1334 if (line
< 1 || line
> s
->nlines
)
1337 error (_("Line number %d out of range; %s has %d lines."),
1338 line
, s
->filename
, s
->nlines
);
1341 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1344 perror_with_name (s
->filename
);
1347 stream
= fdopen (desc
, FDOPEN_MODE
);
1349 cleanup
= make_cleanup_fclose (stream
);
1351 while (nlines
-- > 0)
1358 last_line_listed
= current_source_line
;
1359 if (flags
& PRINT_SOURCE_LINES_FILENAME
)
1361 ui_out_text (uiout
, s
->filename
);
1362 ui_out_text (uiout
, ":");
1364 xsnprintf (buf
, sizeof (buf
), "%d\t", current_source_line
++);
1365 ui_out_text (uiout
, buf
);
1368 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1370 xsnprintf (buf
, sizeof (buf
), "^%c", c
+ 0100);
1371 ui_out_text (uiout
, buf
);
1374 ui_out_text (uiout
, "^?");
1377 /* Skip a \r character, but only before a \n. */
1378 int c1
= fgetc (stream
);
1381 printf_filtered ("^%c", c
+ 0100);
1383 ungetc (c1
, stream
);
1387 xsnprintf (buf
, sizeof (buf
), "%c", c
);
1388 ui_out_text (uiout
, buf
);
1391 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1394 do_cleanups (cleanup
);
1397 /* Show source lines from the file of symtab S, starting with line
1398 number LINE and stopping before line number STOPLINE. If this is
1399 not the command line version, then the source is shown in the source
1400 window otherwise it is simply printed. */
1403 print_source_lines (struct symtab
*s
, int line
, int stopline
,
1404 enum print_source_lines_flags flags
)
1406 print_source_lines_base (s
, line
, stopline
, flags
);
1409 /* Print info on range of pc's in a specified line. */
1412 line_info (char *arg
, int from_tty
)
1414 struct symtabs_and_lines sals
;
1415 struct symtab_and_line sal
;
1416 CORE_ADDR start_pc
, end_pc
;
1418 struct cleanup
*cleanups
;
1420 init_sal (&sal
); /* initialize to zeroes */
1424 sal
.symtab
= current_source_symtab
;
1425 sal
.pspace
= current_program_space
;
1426 sal
.line
= last_line_listed
;
1428 sals
.sals
= (struct symtab_and_line
*)
1429 xmalloc (sizeof (struct symtab_and_line
));
1434 sals
= decode_line_with_last_displayed (arg
, DECODE_LINE_LIST_MODE
);
1439 cleanups
= make_cleanup (xfree
, sals
.sals
);
1441 /* C++ More than one line may have been specified, as when the user
1442 specifies an overloaded function name. Print info on them all. */
1443 for (i
= 0; i
< sals
.nelts
; i
++)
1446 if (sal
.pspace
!= current_program_space
)
1449 if (sal
.symtab
== 0)
1451 struct gdbarch
*gdbarch
= get_current_arch ();
1453 printf_filtered (_("No line number information available"));
1456 /* This is useful for "info line *0x7f34". If we can't tell the
1457 user about a source line, at least let them have the symbolic
1459 printf_filtered (" for address ");
1461 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1464 printf_filtered (".");
1465 printf_filtered ("\n");
1467 else if (sal
.line
> 0
1468 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1470 struct gdbarch
*gdbarch
= get_objfile_arch (sal
.symtab
->objfile
);
1472 if (start_pc
== end_pc
)
1474 printf_filtered ("Line %d of \"%s\"",
1475 sal
.line
, sal
.symtab
->filename
);
1477 printf_filtered (" is at address ");
1478 print_address (gdbarch
, start_pc
, gdb_stdout
);
1480 printf_filtered (" but contains no code.\n");
1484 printf_filtered ("Line %d of \"%s\"",
1485 sal
.line
, sal
.symtab
->filename
);
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
.nelts
== 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
, sal
.symtab
->filename
);
1513 do_cleanups (cleanups
);
1516 /* Commands to search the source file for a regexp. */
1519 forward_search_command (char *regex
, int from_tty
)
1526 struct cleanup
*cleanups
;
1528 line
= last_line_listed
+ 1;
1530 msg
= (char *) re_comp (regex
);
1532 error (("%s"), msg
);
1534 if (current_source_symtab
== 0)
1535 select_source_symtab (0);
1537 desc
= open_source_file (current_source_symtab
);
1539 perror_with_name (current_source_symtab
->filename
);
1540 cleanups
= make_cleanup_close (desc
);
1542 if (current_source_symtab
->line_charpos
== 0)
1543 find_source_lines (current_source_symtab
, desc
);
1545 if (line
< 1 || line
> current_source_symtab
->nlines
)
1546 error (_("Expression not found"));
1548 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1549 perror_with_name (current_source_symtab
->filename
);
1551 discard_cleanups (cleanups
);
1552 stream
= fdopen (desc
, FDOPEN_MODE
);
1554 cleanups
= make_cleanup_fclose (stream
);
1557 static char *buf
= NULL
;
1559 int cursize
, newsize
;
1562 buf
= xmalloc (cursize
);
1571 if (p
- buf
== cursize
)
1573 newsize
= cursize
+ cursize
/ 2;
1574 buf
= xrealloc (buf
, newsize
);
1579 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1581 /* Remove the \r, if any, at the end of the line, otherwise
1582 regular expressions that end with $ or \n won't work. */
1583 if (p
- buf
> 1 && p
[-2] == '\r')
1589 /* We now have a source line in buf, null terminate and match. */
1591 if (re_exec (buf
) > 0)
1594 do_cleanups (cleanups
);
1595 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1596 set_internalvar_integer (lookup_internalvar ("_"), line
);
1597 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1603 printf_filtered (_("Expression not found\n"));
1604 do_cleanups (cleanups
);
1608 reverse_search_command (char *regex
, int from_tty
)
1615 struct cleanup
*cleanups
;
1617 line
= last_line_listed
- 1;
1619 msg
= (char *) re_comp (regex
);
1621 error (("%s"), msg
);
1623 if (current_source_symtab
== 0)
1624 select_source_symtab (0);
1626 desc
= open_source_file (current_source_symtab
);
1628 perror_with_name (current_source_symtab
->filename
);
1629 cleanups
= make_cleanup_close (desc
);
1631 if (current_source_symtab
->line_charpos
== 0)
1632 find_source_lines (current_source_symtab
, desc
);
1634 if (line
< 1 || line
> current_source_symtab
->nlines
)
1635 error (_("Expression not found"));
1637 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1638 perror_with_name (current_source_symtab
->filename
);
1640 discard_cleanups (cleanups
);
1641 stream
= fdopen (desc
, FDOPEN_MODE
);
1643 cleanups
= make_cleanup_fclose (stream
);
1646 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1647 char buf
[4096]; /* Should be reasonable??? */
1657 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1659 /* Remove the \r, if any, at the end of the line, otherwise
1660 regular expressions that end with $ or \n won't work. */
1661 if (p
- buf
> 1 && p
[-2] == '\r')
1667 /* We now have a source line in buf; null terminate and match. */
1669 if (re_exec (buf
) > 0)
1672 do_cleanups (cleanups
);
1673 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1674 set_internalvar_integer (lookup_internalvar ("_"), line
);
1675 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1679 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1681 do_cleanups (cleanups
);
1682 perror_with_name (current_source_symtab
->filename
);
1686 printf_filtered (_("Expression not found\n"));
1687 do_cleanups (cleanups
);
1691 /* If the last character of PATH is a directory separator, then strip it. */
1694 strip_trailing_directory_separator (char *path
)
1696 const int last
= strlen (path
) - 1;
1699 return; /* No stripping is needed if PATH is the empty string. */
1701 if (IS_DIR_SEPARATOR (path
[last
]))
1705 /* Return the path substitution rule that matches FROM.
1706 Return NULL if no rule matches. */
1708 static struct substitute_path_rule
*
1709 find_substitute_path_rule (const char *from
)
1711 struct substitute_path_rule
*rule
= substitute_path_rules
;
1713 while (rule
!= NULL
)
1715 if (FILENAME_CMP (rule
->from
, from
) == 0)
1723 /* Add a new substitute-path rule at the end of the current list of rules.
1724 The new rule will replace FROM into TO. */
1727 add_substitute_path_rule (char *from
, char *to
)
1729 struct substitute_path_rule
*rule
;
1730 struct substitute_path_rule
*new_rule
;
1732 new_rule
= xmalloc (sizeof (struct substitute_path_rule
));
1733 new_rule
->from
= xstrdup (from
);
1734 new_rule
->to
= xstrdup (to
);
1735 new_rule
->next
= NULL
;
1737 /* If the list of rules are empty, then insert the new rule
1738 at the head of the list. */
1740 if (substitute_path_rules
== NULL
)
1742 substitute_path_rules
= new_rule
;
1746 /* Otherwise, skip to the last rule in our list and then append
1749 rule
= substitute_path_rules
;
1750 while (rule
->next
!= NULL
)
1753 rule
->next
= new_rule
;
1756 /* Remove the given source path substitution rule from the current list
1757 of rules. The memory allocated for that rule is also deallocated. */
1760 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1762 if (rule
== substitute_path_rules
)
1763 substitute_path_rules
= rule
->next
;
1766 struct substitute_path_rule
*prev
= substitute_path_rules
;
1768 while (prev
!= NULL
&& prev
->next
!= rule
)
1771 gdb_assert (prev
!= NULL
);
1773 prev
->next
= rule
->next
;
1781 /* Implement the "show substitute-path" command. */
1784 show_substitute_path_command (char *args
, int from_tty
)
1786 struct substitute_path_rule
*rule
= substitute_path_rules
;
1790 argv
= gdb_buildargv (args
);
1791 make_cleanup_freeargv (argv
);
1793 /* We expect zero or one argument. */
1795 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1796 error (_("Too many arguments in command"));
1798 if (argv
!= NULL
&& argv
[0] != NULL
)
1801 /* Print the substitution rules. */
1805 (_("Source path substitution rule matching `%s':\n"), from
);
1807 printf_filtered (_("List of all source path substitution rules:\n"));
1809 while (rule
!= NULL
)
1811 if (from
== NULL
|| FILENAME_CMP (rule
->from
, from
) == 0)
1812 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1817 /* Implement the "unset substitute-path" command. */
1820 unset_substitute_path_command (char *args
, int from_tty
)
1822 struct substitute_path_rule
*rule
= substitute_path_rules
;
1823 char **argv
= gdb_buildargv (args
);
1827 /* This function takes either 0 or 1 argument. */
1829 make_cleanup_freeargv (argv
);
1830 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1831 error (_("Incorrect usage, too many arguments in command"));
1833 if (argv
!= NULL
&& argv
[0] != NULL
)
1836 /* If the user asked for all the rules to be deleted, ask him
1837 to confirm and give him a chance to abort before the action
1841 && !query (_("Delete all source path substitution rules? ")))
1842 error (_("Canceled"));
1844 /* Delete the rule matching the argument. No argument means that
1845 all rules should be deleted. */
1847 while (rule
!= NULL
)
1849 struct substitute_path_rule
*next
= rule
->next
;
1851 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1853 delete_substitute_path_rule (rule
);
1860 /* If the user asked for a specific rule to be deleted but
1861 we could not find it, then report an error. */
1863 if (from
!= NULL
&& !rule_found
)
1864 error (_("No substitution rule defined for `%s'"), from
);
1866 forget_cached_source_info ();
1869 /* Add a new source path substitution rule. */
1872 set_substitute_path_command (char *args
, int from_tty
)
1875 struct substitute_path_rule
*rule
;
1877 argv
= gdb_buildargv (args
);
1878 make_cleanup_freeargv (argv
);
1880 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1881 error (_("Incorrect usage, too few arguments in command"));
1883 if (argv
[2] != NULL
)
1884 error (_("Incorrect usage, too many arguments in command"));
1886 if (*(argv
[0]) == '\0')
1887 error (_("First argument must be at least one character long"));
1889 /* Strip any trailing directory separator character in either FROM
1890 or TO. The substitution rule already implicitly contains them. */
1891 strip_trailing_directory_separator (argv
[0]);
1892 strip_trailing_directory_separator (argv
[1]);
1894 /* If a rule with the same "from" was previously defined, then
1895 delete it. This new rule replaces it. */
1897 rule
= find_substitute_path_rule (argv
[0]);
1899 delete_substitute_path_rule (rule
);
1901 /* Insert the new substitution rule. */
1903 add_substitute_path_rule (argv
[0], argv
[1]);
1904 forget_cached_source_info ();
1909 _initialize_source (void)
1911 struct cmd_list_element
*c
;
1913 current_source_symtab
= 0;
1914 init_source_path ();
1916 /* The intention is to use POSIX Basic Regular Expressions.
1917 Always use the GNU regex routine for consistency across all hosts.
1918 Our current GNU regex.c does not have all the POSIX features, so this is
1919 just an approximation. */
1920 re_set_syntax (RE_SYNTAX_GREP
);
1922 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1923 Add directory DIR to beginning of search path for source files.\n\
1924 Forget cached info on source file locations and line positions.\n\
1925 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1926 directory in which the source file was compiled into object code.\n\
1927 With no argument, reset the search path to $cdir:$cwd, the default."),
1931 add_com_alias ("use", "directory", class_files
, 0);
1933 set_cmd_completer (c
, filename_completer
);
1935 add_setshow_optional_filename_cmd ("directories",
1939 Set the search path for finding source files."),
1941 Show the search path for finding source files."),
1943 $cwd in the path means the current working directory.\n\
1944 $cdir in the path means the compilation directory of the source file.\n\
1945 GDB ensures the search path always ends with $cdir:$cwd by\n\
1946 appending these directories if necessary.\n\
1947 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1948 set_directories_command
,
1949 show_directories_command
,
1950 &setlist
, &showlist
);
1954 add_com_alias ("D", "directory", class_files
, 0);
1955 add_cmd ("ld", no_class
, show_directories_1
, _("\
1956 Current search path for finding source files.\n\
1957 $cwd in the path means the current working directory.\n\
1958 $cdir in the path means the compilation directory of the source file."),
1962 add_info ("source", source_info
,
1963 _("Information about the current source file."));
1965 add_info ("line", line_info
, _("\
1966 Core addresses of the code for a source line.\n\
1967 Line can be specified as\n\
1968 LINENUM, to list around that line in current file,\n\
1969 FILE:LINENUM, to list around that line in that file,\n\
1970 FUNCTION, to list around beginning of that function,\n\
1971 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1972 Default is to describe the last source line that was listed.\n\n\
1973 This sets the default address for \"x\" to the line's first instruction\n\
1974 so that \"x/i\" suffices to start examining the machine code.\n\
1975 The address is also stored as the value of \"$_\"."));
1977 add_com ("forward-search", class_files
, forward_search_command
, _("\
1978 Search for regular expression (see regex(3)) from last line listed.\n\
1979 The matching line number is also stored as the value of \"$_\"."));
1980 add_com_alias ("search", "forward-search", class_files
, 0);
1981 add_com_alias ("fo", "forward-search", class_files
, 1);
1983 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1984 Search backward for regular expression (see regex(3)) from last line listed.\n\
1985 The matching line number is also stored as the value of \"$_\"."));
1986 add_com_alias ("rev", "reverse-search", class_files
, 1);
1990 add_com_alias ("/", "forward-search", class_files
, 0);
1991 add_com_alias ("?", "reverse-search", class_files
, 0);
1994 add_setshow_zuinteger_unlimited_cmd ("listsize", class_support
,
1995 &lines_to_list
, _("\
1996 Set number of source lines gdb will list by default."), _("\
1997 Show number of source lines gdb will list by default."), NULL
,
1998 NULL
, show_lines_to_list
,
1999 &setlist
, &showlist
);
2001 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
2003 Usage: set substitute-path FROM TO\n\
2004 Add a substitution rule replacing FROM into TO in source file names.\n\
2005 If a substitution rule was previously set for FROM, the old rule\n\
2006 is replaced by the new one."),
2009 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
2011 Usage: unset substitute-path [FROM]\n\
2012 Delete the rule for substituting FROM in source file names. If FROM\n\
2013 is not specified, all substituting rules are deleted.\n\
2014 If the debugger cannot find a rule for FROM, it will display a warning."),
2017 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
2019 Usage: show substitute-path [FROM]\n\
2020 Print the rule for substituting FROM in source file names. If FROM\n\
2021 is not specified, print all substitution rules."),