1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008,
4 2009, 2010, 2011 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "arch-utils.h"
24 #include "expression.h"
31 #include "gdb_assert.h"
33 #include <sys/types.h>
34 #include "gdb_string.h"
38 #include "gdb_regex.h"
44 #include "filenames.h" /* for DOSish file names */
45 #include "completer.h"
47 #include "readline/readline.h"
52 #define OPEN_MODE (O_RDONLY | O_BINARY)
53 #define FDOPEN_MODE FOPEN_RB
55 /* Prototypes for exported functions. */
57 void _initialize_source (void);
59 /* Prototypes for local functions. */
61 static int get_filename_and_charpos (struct symtab
*, char **);
63 static void reverse_search_command (char *, int);
65 static void forward_search_command (char *, int);
67 static void line_info (char *, int);
69 static void source_info (char *, int);
71 /* Path of directories to search for source files.
72 Same format as the PATH environment variable's value. */
76 /* Support for source path substitution commands. */
78 struct substitute_path_rule
82 struct substitute_path_rule
*next
;
85 static struct substitute_path_rule
*substitute_path_rules
= NULL
;
87 /* Symtab of default file for listing lines of. */
89 static struct symtab
*current_source_symtab
;
91 /* Default next line to list. */
93 static int current_source_line
;
95 static struct program_space
*current_source_pspace
;
97 /* Default number of lines to print with commands like "list".
98 This is based on guessing how many long (i.e. more than chars_per_line
99 characters) lines there will be. To be completely correct, "list"
100 and friends should be rewritten to count characters and see where
101 things are wrapping, but that would be a fair amount of work. */
103 int lines_to_list
= 10;
105 show_lines_to_list (struct ui_file
*file
, int from_tty
,
106 struct cmd_list_element
*c
, const char *value
)
108 fprintf_filtered (file
,
109 _("Number of source lines gdb "
110 "will list by default is %s.\n"),
114 /* Line number of last line printed. Default for various commands.
115 current_source_line is usually, but not always, the same as this. */
117 static int last_line_listed
;
119 /* First line number listed by last listing command. */
121 static int first_line_listed
;
123 /* Saves the name of the last source file visited and a possible error code.
124 Used to prevent repeating annoying "No such file or directories" msgs. */
126 static struct symtab
*last_source_visited
= NULL
;
127 static int last_source_error
= 0;
129 /* Return the first line listed by print_source_lines.
130 Used by command interpreters to request listing from
134 get_first_line_listed (void)
136 return first_line_listed
;
139 /* Return the default number of lines to print with commands like the
140 cli "list". The caller of print_source_lines must use this to
141 calculate the end line and use it in the call to print_source_lines
142 as it does not automatically use this value. */
145 get_lines_to_list (void)
147 return lines_to_list
;
150 /* Return the current source file for listing and next line to list.
151 NOTE: The returned sal pc and end fields are not valid. */
153 struct symtab_and_line
154 get_current_source_symtab_and_line (void)
156 struct symtab_and_line cursal
= { 0 };
158 cursal
.pspace
= current_source_pspace
;
159 cursal
.symtab
= current_source_symtab
;
160 cursal
.line
= current_source_line
;
167 /* If the current source file for listing is not set, try and get a default.
168 Usually called before get_current_source_symtab_and_line() is called.
169 It may err out if a default cannot be determined.
170 We must be cautious about where it is called, as it can recurse as the
171 process of determining a new default may call the caller!
172 Use get_current_source_symtab_and_line only to get whatever
173 we have without erroring out or trying to get a default. */
176 set_default_source_symtab_and_line (void)
178 if (!have_full_symbols () && !have_partial_symbols ())
179 error (_("No symbol table is loaded. Use the \"file\" command."));
181 /* Pull in a current source symtab if necessary. */
182 if (current_source_symtab
== 0)
183 select_source_symtab (0);
186 /* Return the current default file for listing and next line to list
187 (the returned sal pc and end fields are not valid.)
188 and set the current default to whatever is in SAL.
189 NOTE: The returned sal pc and end fields are not valid. */
191 struct symtab_and_line
192 set_current_source_symtab_and_line (const struct symtab_and_line
*sal
)
194 struct symtab_and_line cursal
= { 0 };
196 cursal
.pspace
= current_source_pspace
;
197 cursal
.symtab
= current_source_symtab
;
198 cursal
.line
= current_source_line
;
202 current_source_pspace
= sal
->pspace
;
203 current_source_symtab
= sal
->symtab
;
204 current_source_line
= sal
->line
;
209 /* Reset any information stored about a default file and line to print. */
212 clear_current_source_symtab_and_line (void)
214 current_source_symtab
= 0;
215 current_source_line
= 0;
218 /* Set the source file default for the "list" command to be S.
220 If S is NULL, and we don't have a default, find one. This
221 should only be called when the user actually tries to use the
222 default, since we produce an error if we can't find a reasonable
223 default. Also, since this can cause symbols to be read, doing it
224 before we need to would make things slower than necessary. */
227 select_source_symtab (struct symtab
*s
)
229 struct symtabs_and_lines sals
;
230 struct symtab_and_line sal
;
235 current_source_symtab
= s
;
236 current_source_line
= 1;
237 current_source_pspace
= SYMTAB_PSPACE (s
);
241 if (current_source_symtab
)
244 /* Make the default place to list be the function `main'
246 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0))
248 sals
= decode_line_spec (main_name (), 1);
251 current_source_pspace
= sal
.pspace
;
252 current_source_symtab
= sal
.symtab
;
253 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
254 if (current_source_symtab
)
258 /* Alright; find the last file in the symtab list (ignoring .h's
259 and namespace symtabs). */
261 current_source_line
= 1;
265 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
267 const char *name
= s
->filename
;
268 int len
= strlen (name
);
270 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
271 || strcmp (name
, "<<C++-namespaces>>") == 0)))
273 current_source_pspace
= current_program_space
;
274 current_source_symtab
= s
;
279 if (current_source_symtab
)
285 s
= ofp
->sf
->qf
->find_last_source_symtab (ofp
);
287 current_source_symtab
= s
;
289 if (current_source_symtab
)
292 error (_("Can't find a default source file"));
295 /* Handler for "set directories path-list" command.
296 "set dir mumble" doesn't prepend paths, it resets the entire
297 path list. The theory is that set(show(dir)) should be a no-op. */
300 set_directories_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
302 /* This is the value that was set.
303 It needs to be processed to maintain $cdir:$cwd and remove dups. */
304 char *set_path
= source_path
;
306 /* We preserve the invariant that $cdir:$cwd begins life at the end of
307 the list by calling init_source_path. If they appear earlier in
308 SET_PATH then mod_path will move them appropriately.
309 mod_path will also remove duplicates. */
311 if (*set_path
!= '\0')
312 mod_path (set_path
, &source_path
);
317 /* Print the list of source directories.
318 This is used by the "ld" command, so it has the signature of a command
322 show_directories_1 (char *ignore
, int from_tty
)
324 puts_filtered ("Source directories searched: ");
325 puts_filtered (source_path
);
326 puts_filtered ("\n");
329 /* Handler for "show directories" command. */
332 show_directories_command (struct ui_file
*file
, int from_tty
,
333 struct cmd_list_element
*c
, const char *value
)
335 show_directories_1 (NULL
, from_tty
);
338 /* Forget what we learned about line positions in source files, and
339 which directories contain them; must check again now since files
340 may be found in a different directory now. */
343 forget_cached_source_info (void)
345 struct program_space
*pspace
;
347 struct objfile
*objfile
;
350 ALL_PSPACE_OBJFILES (pspace
, objfile
)
352 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
354 if (s
->line_charpos
!= NULL
)
356 xfree (s
->line_charpos
);
357 s
->line_charpos
= NULL
;
359 if (s
->fullname
!= NULL
)
367 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
370 last_source_visited
= NULL
;
374 init_source_path (void)
378 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
379 source_path
= xstrdup (buf
);
380 forget_cached_source_info ();
383 /* Add zero or more directories to the front of the source path. */
386 directory_command (char *dirname
, int from_tty
)
389 /* FIXME, this goes to "delete dir"... */
392 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
400 mod_path (dirname
, &source_path
);
401 forget_cached_source_info ();
404 show_directories_1 ((char *) 0, from_tty
);
407 /* Add a path given with the -d command line switch.
408 This will not be quoted so we must not treat spaces as separators. */
411 directory_switch (char *dirname
, int from_tty
)
413 add_path (dirname
, &source_path
, 0);
416 /* Add zero or more directories to the front of an arbitrary path. */
419 mod_path (char *dirname
, char **which_path
)
421 add_path (dirname
, which_path
, 1);
424 /* Workhorse of mod_path. Takes an extra argument to determine
425 if dirname should be parsed for separators that indicate multiple
426 directories. This allows for interfaces that pre-parse the dirname
427 and allow specification of traditional separator characters such
431 add_path (char *dirname
, char **which_path
, int parse_separators
)
433 char *old
= *which_path
;
442 if (parse_separators
)
444 /* This will properly parse the space and tab separators
445 and any quotes that may exist. DIRNAME_SEPARATOR will
446 be dealt with later. */
447 argv
= gdb_buildargv (dirname
);
448 make_cleanup_freeargv (argv
);
454 arg
= xstrdup (dirname
);
455 make_cleanup (xfree
, arg
);
465 char *separator
= NULL
;
467 /* Spaces and tabs will have been removed by buildargv().
468 The directories will there be split into a list but
469 each entry may still contain DIRNAME_SEPARATOR. */
470 if (parse_separators
)
471 separator
= strchr (name
, DIRNAME_SEPARATOR
);
474 p
= arg
= name
+ strlen (name
);
479 while (*arg
== DIRNAME_SEPARATOR
)
483 /* If there are no more directories in this argument then start
484 on the next argument next time round the loop (if any). */
486 arg
= parse_separators
? argv
[++argv_index
] : NULL
;
489 /* name is the start of the directory.
490 p is the separator (or null) following the end. */
492 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
493 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
494 /* On MS-DOS and MS-Windows, h:\ is different from h: */
495 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
497 && IS_DIR_SEPARATOR (p
[-1]))
498 /* Sigh. "foo/" => "foo" */
502 while (p
> name
&& p
[-1] == '.')
506 /* "." => getwd (). */
507 name
= current_directory
;
510 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
520 /* "...foo/." => "...foo". */
531 name
= tilde_expand (name
);
532 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
533 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
534 name
= concat (name
, ".", (char *)NULL
);
536 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
537 name
= concat (current_directory
, SLASH_STRING
, name
, (char *)NULL
);
539 name
= savestring (name
, p
- name
);
540 make_cleanup (xfree
, name
);
542 /* Unless it's a variable, check existence. */
545 /* These are warnings, not errors, since we don't want a
546 non-existent directory in a .gdbinit file to stop processing
547 of the .gdbinit file.
549 Whether they get added to the path is more debatable. Current
550 answer is yes, in case the user wants to go make the directory
551 or whatever. If the directory continues to not exist/not be
552 a directory/etc, then having them in the path should be
554 if (stat (name
, &st
) < 0)
556 int save_errno
= errno
;
558 fprintf_unfiltered (gdb_stderr
, "Warning: ");
559 print_sys_errmsg (name
, save_errno
);
561 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
562 warning (_("%s is not a directory."), name
);
567 unsigned int len
= strlen (name
);
572 /* FIXME: we should use realpath() or its work-alike
573 before comparing. Then all the code above which
574 removes excess slashes and dots could simply go away. */
575 if (!filename_ncmp (p
, name
, len
)
576 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
578 /* Found it in the search path, remove old copy. */
580 p
--; /* Back over leading separator. */
581 if (prefix
> p
- *which_path
)
582 goto skip_dup
; /* Same dir twice in one cmd. */
583 strcpy (p
, &p
[len
+ 1]); /* Copy from next \0 or : */
585 p
= strchr (p
, DIRNAME_SEPARATOR
);
595 tinybuf
[0] = DIRNAME_SEPARATOR
;
598 /* If we have already tacked on a name(s) in this command,
599 be sure they stay on the front as we tack on some
607 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
609 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
610 prefix
= strlen (temp
);
615 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
617 prefix
= strlen (name
);
631 source_info (char *ignore
, int from_tty
)
633 struct symtab
*s
= current_source_symtab
;
637 printf_filtered (_("No current source file.\n"));
640 printf_filtered (_("Current source file is %s\n"), s
->filename
);
642 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
644 printf_filtered (_("Located in %s\n"), s
->fullname
);
646 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
647 s
->nlines
== 1 ? "" : "s");
649 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
650 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
651 printf_filtered (_("%s preprocessor macro info.\n"),
652 s
->macro_table
? "Includes" : "Does not include");
656 /* Return True if the file NAME exists and is a regular file. */
658 is_regular_file (const char *name
)
661 const int status
= stat (name
, &st
);
663 /* Stat should never fail except when the file does not exist.
664 If stat fails, analyze the source of error and return True
665 unless the file does not exist, to avoid returning false results
666 on obscure systems where stat does not work as expected. */
669 return (errno
!= ENOENT
);
671 return S_ISREG (st
.st_mode
);
674 /* Open a file named STRING, searching path PATH (dir names sep by some char)
675 using mode MODE in the calls to open. You cannot use this function to
676 create files (O_CREAT).
678 OPTS specifies the function behaviour in specific cases.
680 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
681 (ie pretend the first element of PATH is "."). This also indicates
682 that a slash in STRING disables searching of the path (this is
683 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
684 get that particular version of foo or an error message).
686 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
687 searched in path (we usually want this for source files but not for
690 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
691 the actual file opened (this string will always start with a "/"). We
692 have to take special pains to avoid doubling the "/" between the directory
693 and the file, sigh! Emacs gets confuzzed by this when we print the
696 If a file is found, return the descriptor.
697 Otherwise, return -1, with errno set for the last name we tried to open. */
699 /* >>>> This should only allow files of certain types,
700 >>>> eg executable, non-directory. */
702 openp (const char *path
, int opts
, const char *string
,
703 int mode
, char **filename_opened
)
712 /* The open syscall MODE parameter is not specified. */
713 gdb_assert ((mode
& O_CREAT
) == 0);
714 gdb_assert (string
!= NULL
);
716 /* A file with an empty name cannot possibly exist. Report a failure
717 without further checking.
719 This is an optimization which also defends us against buggy
720 implementations of the "stat" function. For instance, we have
721 noticed that a MinGW debugger built on Windows XP 32bits crashes
722 when the debugger is started with an empty argument. */
723 if (string
[0] == '\0')
734 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
738 if (is_regular_file (string
))
740 filename
= alloca (strlen (string
) + 1);
741 strcpy (filename
, string
);
742 fd
= open (filename
, mode
);
752 if (!(opts
& OPF_SEARCH_IN_PATH
))
753 for (i
= 0; string
[i
]; i
++)
754 if (IS_DIR_SEPARATOR (string
[i
]))
758 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
759 if (HAS_DRIVE_SPEC (string
))
760 string
= STRIP_DRIVE_SPEC (string
);
762 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
763 while (IS_DIR_SEPARATOR(string
[0]))
767 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
770 alloclen
= strlen (path
) + strlen (string
) + 2;
771 filename
= alloca (alloclen
);
773 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
775 p1
= strchr (p
, DIRNAME_SEPARATOR
);
781 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
782 && p
[2] == 'w' && p
[3] == 'd')
784 /* Name is $cwd -- insert current directory name instead. */
787 /* First, realloc the filename buffer if too short. */
788 len
= strlen (current_directory
);
789 newlen
= len
+ strlen (string
) + 2;
790 if (newlen
> alloclen
)
793 filename
= alloca (alloclen
);
795 strcpy (filename
, current_directory
);
799 /* Normal file name in path -- just use it. */
800 strncpy (filename
, p
, len
);
803 /* Don't search $cdir. It's also a magic path like $cwd, but we
804 don't have enough information to expand it. The user *could*
805 have an actual directory named '$cdir' but handling that would
806 be confusing, it would mean different things in different
807 contexts. If the user really has '$cdir' one can use './$cdir'.
808 We can get $cdir when loading scripts. When loading source files
809 $cdir must have already been expanded to the correct value. */
810 if (strcmp (filename
, "$cdir") == 0)
814 /* Remove trailing slashes. */
815 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
818 strcat (filename
+ len
, SLASH_STRING
);
819 strcat (filename
, string
);
821 if (is_regular_file (filename
))
823 fd
= open (filename
, mode
);
832 /* If a file was opened, canonicalize its filename. Use xfullpath
833 rather than gdb_realpath to avoid resolving the basename part
834 of filenames when the associated file is a symbolic link. This
835 fixes a potential inconsistency between the filenames known to
836 GDB and the filenames it prints in the annotations. */
838 *filename_opened
= NULL
;
839 else if (IS_ABSOLUTE_PATH (filename
))
840 *filename_opened
= xfullpath (filename
);
843 /* Beware the // my son, the Emacs barfs, the botch that catch... */
845 char *f
= concat (current_directory
,
846 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
848 filename
, (char *)NULL
);
850 *filename_opened
= xfullpath (f
);
859 /* This is essentially a convenience, for clients that want the behaviour
860 of openp, using source_path, but that really don't want the file to be
861 opened but want instead just to know what the full pathname is (as
862 qualified against source_path).
864 The current working directory is searched first.
866 If the file was found, this function returns 1, and FULL_PATHNAME is
867 set to the fully-qualified pathname.
869 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
871 source_full_path_of (const char *filename
, char **full_pathname
)
875 fd
= openp (source_path
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
876 O_RDONLY
, full_pathname
);
879 *full_pathname
= NULL
;
887 /* Return non-zero if RULE matches PATH, that is if the rule can be
891 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
894 const int from_len
= strlen (rule
->from
);
895 const int path_len
= strlen (path
);
898 if (path_len
< from_len
)
901 /* The substitution rules are anchored at the start of the path,
902 so the path should start with rule->from. There is no filename
903 comparison routine, so we need to extract the first FROM_LEN
904 characters from PATH first and use that to do the comparison. */
906 path_start
= alloca (from_len
+ 1);
907 strncpy (path_start
, path
, from_len
);
908 path_start
[from_len
] = '\0';
910 if (FILENAME_CMP (path_start
, rule
->from
) != 0)
913 /* Make sure that the region in the path that matches the substitution
914 rule is immediately followed by a directory separator (or the end of
915 string character). */
917 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
923 /* Find the substitute-path rule that applies to PATH and return it.
924 Return NULL if no rule applies. */
926 static struct substitute_path_rule
*
927 get_substitute_path_rule (const char *path
)
929 struct substitute_path_rule
*rule
= substitute_path_rules
;
931 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
937 /* If the user specified a source path substitution rule that applies
938 to PATH, then apply it and return the new path. This new path must
939 be deallocated afterwards.
941 Return NULL if no substitution rule was specified by the user,
942 or if no rule applied to the given PATH. */
945 rewrite_source_path (const char *path
)
947 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
954 from_len
= strlen (rule
->from
);
956 /* Compute the rewritten path and return it. */
959 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
960 strcpy (new_path
, rule
->to
);
961 strcat (new_path
, path
+ from_len
);
966 /* This function is capable of finding the absolute path to a
967 source file, and opening it, provided you give it a FILENAME. Both the
968 DIRNAME and FULLNAME are only added suggestions on where to find the file.
970 FILENAME should be the filename to open.
971 DIRNAME is the compilation directory of a particular source file.
972 Only some debug formats provide this info.
973 FULLNAME can be the last known absolute path to the file in question.
974 Space for the path must have been malloc'd. If a path substitution
975 is applied we free the old value and set a new one.
978 A valid file descriptor is returned (the return value is positive).
979 FULLNAME is set to the absolute path to the file just opened.
980 The caller is responsible for freeing FULLNAME.
983 An invalid file descriptor is returned (the return value is negative).
984 FULLNAME is set to NULL. */
987 find_and_open_source (const char *filename
,
991 char *path
= source_path
;
995 /* Quick way out if we already know its full name. */
999 /* The user may have requested that source paths be rewritten
1000 according to substitution rules he provided. If a substitution
1001 rule applies to this path, then apply it. */
1002 char *rewritten_fullname
= rewrite_source_path (*fullname
);
1004 if (rewritten_fullname
!= NULL
)
1007 *fullname
= rewritten_fullname
;
1010 result
= open (*fullname
, OPEN_MODE
);
1013 /* Didn't work -- free old one, try again. */
1018 if (dirname
!= NULL
)
1020 /* If necessary, rewrite the compilation directory name according
1021 to the source path substitution rules specified by the user. */
1023 char *rewritten_dirname
= rewrite_source_path (dirname
);
1025 if (rewritten_dirname
!= NULL
)
1027 make_cleanup (xfree
, rewritten_dirname
);
1028 dirname
= rewritten_dirname
;
1031 /* Replace a path entry of $cdir with the compilation directory
1034 /* We cast strstr's result in case an ANSIhole has made it const,
1035 which produces a "required warning" when assigned to a nonconst. */
1036 p
= (char *) strstr (source_path
, "$cdir");
1037 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1038 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1043 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1044 len
= p
- source_path
;
1045 strncpy (path
, source_path
, len
); /* Before $cdir */
1046 strcpy (path
+ len
, dirname
); /* new stuff */
1047 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1052 if (IS_ABSOLUTE_PATH (filename
))
1054 /* If filename is absolute path, try the source path
1055 substitution on it. */
1056 char *rewritten_filename
= rewrite_source_path (filename
);
1058 if (rewritten_filename
!= NULL
)
1060 make_cleanup (xfree
, rewritten_filename
);
1061 filename
= rewritten_filename
;
1065 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, fullname
);
1068 /* Didn't work. Try using just the basename. */
1069 p
= lbasename (filename
);
1071 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, fullname
);
1077 /* Open a source file given a symtab S. Returns a file descriptor or
1078 negative number for error.
1080 This function is a convience function to find_and_open_source. */
1083 open_source_file (struct symtab
*s
)
1088 return find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1091 /* Finds the fullname that a symtab represents.
1093 If this functions finds the fullname, it will save it in s->fullname
1094 and it will also return the value.
1096 If this function fails to find the file that this symtab represents,
1097 NULL will be returned and s->fullname will be set to NULL. */
1099 symtab_to_fullname (struct symtab
*s
)
1106 /* Don't check s->fullname here, the file could have been
1107 deleted/moved/..., look for it again. */
1108 r
= find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1119 /* Create and initialize the table S->line_charpos that records
1120 the positions of the lines in the source file, which is assumed
1121 to be open on descriptor DESC.
1122 All set S->nlines to the number of such lines. */
1125 find_source_lines (struct symtab
*s
, int desc
)
1128 char *data
, *p
, *end
;
1130 int lines_allocated
= 1000;
1136 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
1137 if (fstat (desc
, &st
) < 0)
1138 perror_with_name (s
->filename
);
1140 if (s
->objfile
&& s
->objfile
->obfd
)
1141 mtime
= s
->objfile
->mtime
;
1143 mtime
= exec_bfd_mtime
;
1145 if (mtime
&& mtime
< st
.st_mtime
)
1146 warning (_("Source file is more recent than executable."));
1148 #ifdef LSEEK_NOT_LINEAR
1152 /* Have to read it byte by byte to find out where the chars live. */
1154 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
1156 while (myread (desc
, &c
, 1) > 0)
1160 if (nlines
== lines_allocated
)
1162 lines_allocated
*= 2;
1164 (int *) xrealloc ((char *) line_charpos
,
1165 sizeof (int) * lines_allocated
);
1167 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
1171 #else /* lseek linear. */
1173 struct cleanup
*old_cleanups
;
1175 /* st_size might be a large type, but we only support source files whose
1176 size fits in an int. */
1177 size
= (int) st
.st_size
;
1179 /* Use malloc, not alloca, because this may be pretty large, and we may
1180 run into various kinds of limits on stack size. */
1181 data
= (char *) xmalloc (size
);
1182 old_cleanups
= make_cleanup (xfree
, data
);
1184 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1185 size
= myread (desc
, data
, size
);
1187 perror_with_name (s
->filename
);
1190 line_charpos
[0] = 0;
1195 /* A newline at the end does not start a new line. */
1198 if (nlines
== lines_allocated
)
1200 lines_allocated
*= 2;
1202 (int *) xrealloc ((char *) line_charpos
,
1203 sizeof (int) * lines_allocated
);
1205 line_charpos
[nlines
++] = p
- data
;
1208 do_cleanups (old_cleanups
);
1210 #endif /* lseek linear. */
1213 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1217 /* Return the character position of a line LINE in symtab S.
1218 Return 0 if anything is invalid. */
1220 #if 0 /* Currently unused */
1223 source_line_charpos (struct symtab
*s
, int line
)
1227 if (!s
->line_charpos
|| line
<= 0)
1229 if (line
> s
->nlines
)
1231 return s
->line_charpos
[line
- 1];
1234 /* Return the line number of character position POS in symtab S. */
1237 source_charpos_line (struct symtab
*s
, int chr
)
1242 if (s
== 0 || s
->line_charpos
== 0)
1244 lnp
= s
->line_charpos
;
1245 /* Files are usually short, so sequential search is Ok. */
1246 while (line
< s
->nlines
&& *lnp
<= chr
)
1251 if (line
>= s
->nlines
)
1259 /* Get full pathname and line number positions for a symtab.
1260 Return nonzero if line numbers may have changed.
1261 Set *FULLNAME to actual name of the file as found by `openp',
1262 or to 0 if the file is not found. */
1265 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1267 int desc
, linenums_changed
= 0;
1268 struct cleanup
*cleanups
;
1270 desc
= open_source_file (s
);
1277 cleanups
= make_cleanup_close (desc
);
1279 *fullname
= s
->fullname
;
1280 if (s
->line_charpos
== 0)
1281 linenums_changed
= 1;
1282 if (linenums_changed
)
1283 find_source_lines (s
, desc
);
1284 do_cleanups (cleanups
);
1285 return linenums_changed
;
1288 /* Print text describing the full name of the source file S
1289 and the line number LINE and its corresponding character position.
1290 The text starts with two Ctrl-z so that the Emacs-GDB interface
1293 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1295 Return 1 if successful, 0 if could not find the file. */
1298 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1301 if (s
->line_charpos
== 0)
1302 get_filename_and_charpos (s
, (char **) NULL
);
1303 if (s
->fullname
== 0)
1305 if (line
> s
->nlines
)
1306 /* Don't index off the end of the line_charpos array. */
1308 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1309 mid_statement
, get_objfile_arch (s
->objfile
), pc
);
1311 current_source_line
= line
;
1312 first_line_listed
= line
;
1313 last_line_listed
= line
;
1314 current_source_symtab
= s
;
1319 /* Print source lines from the file of symtab S,
1320 starting with line number LINE and stopping before line number STOPLINE. */
1322 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1325 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1331 int nlines
= stopline
- line
;
1332 struct cleanup
*cleanup
;
1334 /* Regardless of whether we can open the file, set current_source_symtab. */
1335 current_source_symtab
= s
;
1336 current_source_line
= line
;
1337 first_line_listed
= line
;
1339 /* If printing of source lines is disabled, just print file and line
1341 if (ui_out_test_flags (uiout
, ui_source_list
))
1343 /* Only prints "No such file or directory" once. */
1344 if ((s
!= last_source_visited
) || (!last_source_error
))
1346 last_source_visited
= s
;
1347 desc
= open_source_file (s
);
1351 desc
= last_source_error
;
1357 desc
= last_source_error
;
1362 if (desc
< 0 || noprint
)
1364 last_source_error
= desc
;
1368 char *name
= alloca (strlen (s
->filename
) + 100);
1369 sprintf (name
, "%d\t%s", line
, s
->filename
);
1370 print_sys_errmsg (name
, errno
);
1373 ui_out_field_int (uiout
, "line", line
);
1374 ui_out_text (uiout
, "\tin ");
1375 ui_out_field_string (uiout
, "file", s
->filename
);
1376 ui_out_text (uiout
, "\n");
1381 last_source_error
= 0;
1383 if (s
->line_charpos
== 0)
1384 find_source_lines (s
, desc
);
1386 if (line
< 1 || line
> s
->nlines
)
1389 error (_("Line number %d out of range; %s has %d lines."),
1390 line
, s
->filename
, s
->nlines
);
1393 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1396 perror_with_name (s
->filename
);
1399 stream
= fdopen (desc
, FDOPEN_MODE
);
1401 cleanup
= make_cleanup_fclose (stream
);
1403 while (nlines
-- > 0)
1410 last_line_listed
= current_source_line
;
1411 sprintf (buf
, "%d\t", current_source_line
++);
1412 ui_out_text (uiout
, buf
);
1415 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1417 sprintf (buf
, "^%c", c
+ 0100);
1418 ui_out_text (uiout
, buf
);
1421 ui_out_text (uiout
, "^?");
1424 /* Skip a \r character, but only before a \n. */
1425 int c1
= fgetc (stream
);
1428 printf_filtered ("^%c", c
+ 0100);
1430 ungetc (c1
, stream
);
1434 sprintf (buf
, "%c", c
);
1435 ui_out_text (uiout
, buf
);
1438 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1441 do_cleanups (cleanup
);
1444 /* Show source lines from the file of symtab S, starting with line
1445 number LINE and stopping before line number STOPLINE. If this is
1446 not the command line version, then the source is shown in the source
1447 window otherwise it is simply printed. */
1450 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1452 print_source_lines_base (s
, line
, stopline
, noerror
);
1455 /* Print info on range of pc's in a specified line. */
1458 line_info (char *arg
, int from_tty
)
1460 struct symtabs_and_lines sals
;
1461 struct symtab_and_line sal
;
1462 CORE_ADDR start_pc
, end_pc
;
1465 init_sal (&sal
); /* initialize to zeroes */
1469 sal
.symtab
= current_source_symtab
;
1470 sal
.line
= last_line_listed
;
1472 sals
.sals
= (struct symtab_and_line
*)
1473 xmalloc (sizeof (struct symtab_and_line
));
1478 sals
= decode_line_spec_1 (arg
, 0);
1483 /* C++ More than one line may have been specified, as when the user
1484 specifies an overloaded function name. Print info on them all. */
1485 for (i
= 0; i
< sals
.nelts
; i
++)
1489 if (sal
.symtab
== 0)
1491 struct gdbarch
*gdbarch
= get_current_arch ();
1493 printf_filtered (_("No line number information available"));
1496 /* This is useful for "info line *0x7f34". If we can't tell the
1497 user about a source line, at least let them have the symbolic
1499 printf_filtered (" for address ");
1501 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1504 printf_filtered (".");
1505 printf_filtered ("\n");
1507 else if (sal
.line
> 0
1508 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1510 struct gdbarch
*gdbarch
= get_objfile_arch (sal
.symtab
->objfile
);
1512 if (start_pc
== end_pc
)
1514 printf_filtered ("Line %d of \"%s\"",
1515 sal
.line
, sal
.symtab
->filename
);
1517 printf_filtered (" is at address ");
1518 print_address (gdbarch
, start_pc
, gdb_stdout
);
1520 printf_filtered (" but contains no code.\n");
1524 printf_filtered ("Line %d of \"%s\"",
1525 sal
.line
, sal
.symtab
->filename
);
1527 printf_filtered (" starts at address ");
1528 print_address (gdbarch
, start_pc
, gdb_stdout
);
1530 printf_filtered (" and ends at ");
1531 print_address (gdbarch
, end_pc
, gdb_stdout
);
1532 printf_filtered (".\n");
1535 /* x/i should display this line's code. */
1536 set_next_address (gdbarch
, start_pc
);
1538 /* Repeating "info line" should do the following line. */
1539 last_line_listed
= sal
.line
+ 1;
1541 /* If this is the only line, show the source code. If it could
1542 not find the file, don't do anything special. */
1543 if (annotation_level
&& sals
.nelts
== 1)
1544 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1547 /* Is there any case in which we get here, and have an address
1548 which the user would want to see? If we have debugging symbols
1549 and no line numbers? */
1550 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1551 sal
.line
, sal
.symtab
->filename
);
1556 /* Commands to search the source file for a regexp. */
1559 forward_search_command (char *regex
, int from_tty
)
1566 struct cleanup
*cleanups
;
1568 line
= last_line_listed
+ 1;
1570 msg
= (char *) re_comp (regex
);
1572 error (("%s"), msg
);
1574 if (current_source_symtab
== 0)
1575 select_source_symtab (0);
1577 desc
= open_source_file (current_source_symtab
);
1579 perror_with_name (current_source_symtab
->filename
);
1580 cleanups
= make_cleanup_close (desc
);
1582 if (current_source_symtab
->line_charpos
== 0)
1583 find_source_lines (current_source_symtab
, desc
);
1585 if (line
< 1 || line
> current_source_symtab
->nlines
)
1586 error (_("Expression not found"));
1588 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1589 perror_with_name (current_source_symtab
->filename
);
1591 discard_cleanups (cleanups
);
1592 stream
= fdopen (desc
, FDOPEN_MODE
);
1594 cleanups
= make_cleanup_fclose (stream
);
1597 static char *buf
= NULL
;
1599 int cursize
, newsize
;
1602 buf
= xmalloc (cursize
);
1611 if (p
- buf
== cursize
)
1613 newsize
= cursize
+ cursize
/ 2;
1614 buf
= xrealloc (buf
, newsize
);
1619 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1621 /* Remove the \r, if any, at the end of the line, otherwise
1622 regular expressions that end with $ or \n won't work. */
1623 if (p
- buf
> 1 && p
[-2] == '\r')
1629 /* We now have a source line in buf, null terminate and match. */
1631 if (re_exec (buf
) > 0)
1634 do_cleanups (cleanups
);
1635 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1636 set_internalvar_integer (lookup_internalvar ("_"), line
);
1637 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1643 printf_filtered (_("Expression not found\n"));
1644 do_cleanups (cleanups
);
1648 reverse_search_command (char *regex
, int from_tty
)
1655 struct cleanup
*cleanups
;
1657 line
= last_line_listed
- 1;
1659 msg
= (char *) re_comp (regex
);
1661 error (("%s"), msg
);
1663 if (current_source_symtab
== 0)
1664 select_source_symtab (0);
1666 desc
= open_source_file (current_source_symtab
);
1668 perror_with_name (current_source_symtab
->filename
);
1669 cleanups
= make_cleanup_close (desc
);
1671 if (current_source_symtab
->line_charpos
== 0)
1672 find_source_lines (current_source_symtab
, desc
);
1674 if (line
< 1 || line
> current_source_symtab
->nlines
)
1675 error (_("Expression not found"));
1677 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1678 perror_with_name (current_source_symtab
->filename
);
1680 discard_cleanups (cleanups
);
1681 stream
= fdopen (desc
, FDOPEN_MODE
);
1683 cleanups
= make_cleanup_fclose (stream
);
1686 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1687 char buf
[4096]; /* Should be reasonable??? */
1697 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1699 /* Remove the \r, if any, at the end of the line, otherwise
1700 regular expressions that end with $ or \n won't work. */
1701 if (p
- buf
> 1 && p
[-2] == '\r')
1707 /* We now have a source line in buf; null terminate and match. */
1709 if (re_exec (buf
) > 0)
1712 do_cleanups (cleanups
);
1713 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1714 set_internalvar_integer (lookup_internalvar ("_"), line
);
1715 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1719 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1721 do_cleanups (cleanups
);
1722 perror_with_name (current_source_symtab
->filename
);
1726 printf_filtered (_("Expression not found\n"));
1727 do_cleanups (cleanups
);
1731 /* If the last character of PATH is a directory separator, then strip it. */
1734 strip_trailing_directory_separator (char *path
)
1736 const int last
= strlen (path
) - 1;
1739 return; /* No stripping is needed if PATH is the empty string. */
1741 if (IS_DIR_SEPARATOR (path
[last
]))
1745 /* Return the path substitution rule that matches FROM.
1746 Return NULL if no rule matches. */
1748 static struct substitute_path_rule
*
1749 find_substitute_path_rule (const char *from
)
1751 struct substitute_path_rule
*rule
= substitute_path_rules
;
1753 while (rule
!= NULL
)
1755 if (FILENAME_CMP (rule
->from
, from
) == 0)
1763 /* Add a new substitute-path rule at the end of the current list of rules.
1764 The new rule will replace FROM into TO. */
1767 add_substitute_path_rule (char *from
, char *to
)
1769 struct substitute_path_rule
*rule
;
1770 struct substitute_path_rule
*new_rule
;
1772 new_rule
= xmalloc (sizeof (struct substitute_path_rule
));
1773 new_rule
->from
= xstrdup (from
);
1774 new_rule
->to
= xstrdup (to
);
1775 new_rule
->next
= NULL
;
1777 /* If the list of rules are empty, then insert the new rule
1778 at the head of the list. */
1780 if (substitute_path_rules
== NULL
)
1782 substitute_path_rules
= new_rule
;
1786 /* Otherwise, skip to the last rule in our list and then append
1789 rule
= substitute_path_rules
;
1790 while (rule
->next
!= NULL
)
1793 rule
->next
= new_rule
;
1796 /* Remove the given source path substitution rule from the current list
1797 of rules. The memory allocated for that rule is also deallocated. */
1800 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1802 if (rule
== substitute_path_rules
)
1803 substitute_path_rules
= rule
->next
;
1806 struct substitute_path_rule
*prev
= substitute_path_rules
;
1808 while (prev
!= NULL
&& prev
->next
!= rule
)
1811 gdb_assert (prev
!= NULL
);
1813 prev
->next
= rule
->next
;
1821 /* Implement the "show substitute-path" command. */
1824 show_substitute_path_command (char *args
, int from_tty
)
1826 struct substitute_path_rule
*rule
= substitute_path_rules
;
1830 argv
= gdb_buildargv (args
);
1831 make_cleanup_freeargv (argv
);
1833 /* We expect zero or one argument. */
1835 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1836 error (_("Too many arguments in command"));
1838 if (argv
!= NULL
&& argv
[0] != NULL
)
1841 /* Print the substitution rules. */
1845 (_("Source path substitution rule matching `%s':\n"), from
);
1847 printf_filtered (_("List of all source path substitution rules:\n"));
1849 while (rule
!= NULL
)
1851 if (from
== NULL
|| FILENAME_CMP (rule
->from
, from
) == 0)
1852 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1857 /* Implement the "unset substitute-path" command. */
1860 unset_substitute_path_command (char *args
, int from_tty
)
1862 struct substitute_path_rule
*rule
= substitute_path_rules
;
1863 char **argv
= gdb_buildargv (args
);
1867 /* This function takes either 0 or 1 argument. */
1869 make_cleanup_freeargv (argv
);
1870 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1871 error (_("Incorrect usage, too many arguments in command"));
1873 if (argv
!= NULL
&& argv
[0] != NULL
)
1876 /* If the user asked for all the rules to be deleted, ask him
1877 to confirm and give him a chance to abort before the action
1881 && !query (_("Delete all source path substitution rules? ")))
1882 error (_("Canceled"));
1884 /* Delete the rule matching the argument. No argument means that
1885 all rules should be deleted. */
1887 while (rule
!= NULL
)
1889 struct substitute_path_rule
*next
= rule
->next
;
1891 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1893 delete_substitute_path_rule (rule
);
1900 /* If the user asked for a specific rule to be deleted but
1901 we could not find it, then report an error. */
1903 if (from
!= NULL
&& !rule_found
)
1904 error (_("No substitution rule defined for `%s'"), from
);
1906 forget_cached_source_info ();
1909 /* Add a new source path substitution rule. */
1912 set_substitute_path_command (char *args
, int from_tty
)
1915 struct substitute_path_rule
*rule
;
1917 argv
= gdb_buildargv (args
);
1918 make_cleanup_freeargv (argv
);
1920 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1921 error (_("Incorrect usage, too few arguments in command"));
1923 if (argv
[2] != NULL
)
1924 error (_("Incorrect usage, too many arguments in command"));
1926 if (*(argv
[0]) == '\0')
1927 error (_("First argument must be at least one character long"));
1929 /* Strip any trailing directory separator character in either FROM
1930 or TO. The substitution rule already implicitly contains them. */
1931 strip_trailing_directory_separator (argv
[0]);
1932 strip_trailing_directory_separator (argv
[1]);
1934 /* If a rule with the same "from" was previously defined, then
1935 delete it. This new rule replaces it. */
1937 rule
= find_substitute_path_rule (argv
[0]);
1939 delete_substitute_path_rule (rule
);
1941 /* Insert the new substitution rule. */
1943 add_substitute_path_rule (argv
[0], argv
[1]);
1944 forget_cached_source_info ();
1949 _initialize_source (void)
1951 struct cmd_list_element
*c
;
1953 current_source_symtab
= 0;
1954 init_source_path ();
1956 /* The intention is to use POSIX Basic Regular Expressions.
1957 Always use the GNU regex routine for consistency across all hosts.
1958 Our current GNU regex.c does not have all the POSIX features, so this is
1959 just an approximation. */
1960 re_set_syntax (RE_SYNTAX_GREP
);
1962 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1963 Add directory DIR to beginning of search path for source files.\n\
1964 Forget cached info on source file locations and line positions.\n\
1965 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1966 directory in which the source file was compiled into object code.\n\
1967 With no argument, reset the search path to $cdir:$cwd, the default."),
1971 add_com_alias ("use", "directory", class_files
, 0);
1973 set_cmd_completer (c
, filename_completer
);
1975 add_setshow_optional_filename_cmd ("directories",
1979 Set the search path for finding source files."),
1981 Show the search path for finding source files."),
1983 $cwd in the path means the current working directory.\n\
1984 $cdir in the path means the compilation directory of the source file.\n\
1985 GDB ensures the search path always ends with $cdir:$cwd by\n\
1986 appending these directories if necessary.\n\
1987 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1988 set_directories_command
,
1989 show_directories_command
,
1990 &setlist
, &showlist
);
1994 add_com_alias ("D", "directory", class_files
, 0);
1995 add_cmd ("ld", no_class
, show_directories_1
, _("\
1996 Current search path for finding source files.\n\
1997 $cwd in the path means the current working directory.\n\
1998 $cdir in the path means the compilation directory of the source file."),
2002 add_info ("source", source_info
,
2003 _("Information about the current source file."));
2005 add_info ("line", line_info
, _("\
2006 Core addresses of the code for a source line.\n\
2007 Line can be specified as\n\
2008 LINENUM, to list around that line in current file,\n\
2009 FILE:LINENUM, to list around that line in that file,\n\
2010 FUNCTION, to list around beginning of that function,\n\
2011 FILE:FUNCTION, to distinguish among like-named static functions.\n\
2012 Default is to describe the last source line that was listed.\n\n\
2013 This sets the default address for \"x\" to the line's first instruction\n\
2014 so that \"x/i\" suffices to start examining the machine code.\n\
2015 The address is also stored as the value of \"$_\"."));
2017 add_com ("forward-search", class_files
, forward_search_command
, _("\
2018 Search for regular expression (see regex(3)) from last line listed.\n\
2019 The matching line number is also stored as the value of \"$_\"."));
2020 add_com_alias ("search", "forward-search", class_files
, 0);
2022 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
2023 Search backward for regular expression (see regex(3)) from last line listed.\n\
2024 The matching line number is also stored as the value of \"$_\"."));
2025 add_com_alias ("rev", "reverse-search", class_files
, 1);
2029 add_com_alias ("/", "forward-search", class_files
, 0);
2030 add_com_alias ("?", "reverse-search", class_files
, 0);
2033 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
2034 Set number of source lines gdb will list by default."), _("\
2035 Show number of source lines gdb will list by default."), NULL
,
2038 &setlist
, &showlist
);
2040 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
2042 Usage: set substitute-path FROM TO\n\
2043 Add a substitution rule replacing FROM into TO in source file names.\n\
2044 If a substitution rule was previously set for FROM, the old rule\n\
2045 is replaced by the new one."),
2048 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
2050 Usage: unset substitute-path [FROM]\n\
2051 Delete the rule for substituting FROM in source file names. If FROM\n\
2052 is not specified, all substituting rules are deleted.\n\
2053 If the debugger cannot find a rule for FROM, it will display a warning."),
2056 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
2058 Usage: show substitute-path [FROM]\n\
2059 Print the rule for substituting FROM in source file names. If FROM\n\
2060 is not specified, print all substitution rules."),