1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1986-2005, 2007-2012 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_spec (main_name (), DECODE_LINE_FUNFIRSTLINE
);
249 current_source_pspace
= sal
.pspace
;
250 current_source_symtab
= sal
.symtab
;
251 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
252 if (current_source_symtab
)
256 /* Alright; find the last file in the symtab list (ignoring .h's
257 and namespace symtabs). */
259 current_source_line
= 1;
263 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
265 const char *name
= s
->filename
;
266 int len
= strlen (name
);
268 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
269 || strcmp (name
, "<<C++-namespaces>>") == 0)))
271 current_source_pspace
= current_program_space
;
272 current_source_symtab
= s
;
277 if (current_source_symtab
)
283 s
= ofp
->sf
->qf
->find_last_source_symtab (ofp
);
285 current_source_symtab
= s
;
287 if (current_source_symtab
)
290 error (_("Can't find a default source file"));
293 /* Handler for "set directories path-list" command.
294 "set dir mumble" doesn't prepend paths, it resets the entire
295 path list. The theory is that set(show(dir)) should be a no-op. */
298 set_directories_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
300 /* This is the value that was set.
301 It needs to be processed to maintain $cdir:$cwd and remove dups. */
302 char *set_path
= source_path
;
304 /* We preserve the invariant that $cdir:$cwd begins life at the end of
305 the list by calling init_source_path. If they appear earlier in
306 SET_PATH then mod_path will move them appropriately.
307 mod_path will also remove duplicates. */
309 if (*set_path
!= '\0')
310 mod_path (set_path
, &source_path
);
315 /* Print the list of source directories.
316 This is used by the "ld" command, so it has the signature of a command
320 show_directories_1 (char *ignore
, int from_tty
)
322 puts_filtered ("Source directories searched: ");
323 puts_filtered (source_path
);
324 puts_filtered ("\n");
327 /* Handler for "show directories" command. */
330 show_directories_command (struct ui_file
*file
, int from_tty
,
331 struct cmd_list_element
*c
, const char *value
)
333 show_directories_1 (NULL
, from_tty
);
336 /* Forget line positions and file names for the symtabs in a
337 particular objfile. */
340 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
344 ALL_OBJFILE_SYMTABS (objfile
, s
)
346 if (s
->line_charpos
!= NULL
)
348 xfree (s
->line_charpos
);
349 s
->line_charpos
= NULL
;
351 if (s
->fullname
!= NULL
)
359 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
362 /* Forget what we learned about line positions in source files, and
363 which directories contain them; must check again now since files
364 may be found in a different directory now. */
367 forget_cached_source_info (void)
369 struct program_space
*pspace
;
370 struct objfile
*objfile
;
373 ALL_PSPACE_OBJFILES (pspace
, objfile
)
375 forget_cached_source_info_for_objfile (objfile
);
378 last_source_visited
= NULL
;
382 init_source_path (void)
386 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
387 source_path
= xstrdup (buf
);
388 forget_cached_source_info ();
391 /* Add zero or more directories to the front of the source path. */
394 directory_command (char *dirname
, int from_tty
)
397 /* FIXME, this goes to "delete dir"... */
400 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
408 mod_path (dirname
, &source_path
);
409 forget_cached_source_info ();
412 show_directories_1 ((char *) 0, from_tty
);
415 /* Add a path given with the -d command line switch.
416 This will not be quoted so we must not treat spaces as separators. */
419 directory_switch (char *dirname
, int from_tty
)
421 add_path (dirname
, &source_path
, 0);
424 /* Add zero or more directories to the front of an arbitrary path. */
427 mod_path (char *dirname
, char **which_path
)
429 add_path (dirname
, which_path
, 1);
432 /* Workhorse of mod_path. Takes an extra argument to determine
433 if dirname should be parsed for separators that indicate multiple
434 directories. This allows for interfaces that pre-parse the dirname
435 and allow specification of traditional separator characters such
439 add_path (char *dirname
, char **which_path
, int parse_separators
)
441 char *old
= *which_path
;
450 if (parse_separators
)
452 /* This will properly parse the space and tab separators
453 and any quotes that may exist. DIRNAME_SEPARATOR will
454 be dealt with later. */
455 argv
= gdb_buildargv (dirname
);
456 make_cleanup_freeargv (argv
);
462 arg
= xstrdup (dirname
);
463 make_cleanup (xfree
, arg
);
473 char *separator
= NULL
;
475 /* Spaces and tabs will have been removed by buildargv().
476 The directories will there be split into a list but
477 each entry may still contain DIRNAME_SEPARATOR. */
478 if (parse_separators
)
479 separator
= strchr (name
, DIRNAME_SEPARATOR
);
482 p
= arg
= name
+ strlen (name
);
487 while (*arg
== DIRNAME_SEPARATOR
)
491 /* If there are no more directories in this argument then start
492 on the next argument next time round the loop (if any). */
494 arg
= parse_separators
? argv
[++argv_index
] : NULL
;
497 /* name is the start of the directory.
498 p is the separator (or null) following the end. */
500 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
501 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
502 /* On MS-DOS and MS-Windows, h:\ is different from h: */
503 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
505 && IS_DIR_SEPARATOR (p
[-1]))
506 /* Sigh. "foo/" => "foo" */
510 while (p
> name
&& p
[-1] == '.')
514 /* "." => getwd (). */
515 name
= current_directory
;
518 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
528 /* "...foo/." => "...foo". */
539 name
= tilde_expand (name
);
540 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
541 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
542 name
= concat (name
, ".", (char *)NULL
);
544 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
545 name
= concat (current_directory
, SLASH_STRING
, name
, (char *)NULL
);
547 name
= savestring (name
, p
- name
);
548 make_cleanup (xfree
, name
);
550 /* Unless it's a variable, check existence. */
553 /* These are warnings, not errors, since we don't want a
554 non-existent directory in a .gdbinit file to stop processing
555 of the .gdbinit file.
557 Whether they get added to the path is more debatable. Current
558 answer is yes, in case the user wants to go make the directory
559 or whatever. If the directory continues to not exist/not be
560 a directory/etc, then having them in the path should be
562 if (stat (name
, &st
) < 0)
564 int save_errno
= errno
;
566 fprintf_unfiltered (gdb_stderr
, "Warning: ");
567 print_sys_errmsg (name
, save_errno
);
569 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
570 warning (_("%s is not a directory."), name
);
575 unsigned int len
= strlen (name
);
581 /* FIXME: we should use realpath() or its work-alike
582 before comparing. Then all the code above which
583 removes excess slashes and dots could simply go away. */
584 if (!filename_ncmp (p
, name
, len
)
585 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
587 /* Found it in the search path, remove old copy. */
589 p
--; /* Back over leading separator. */
590 if (prefix
> p
- *which_path
)
591 goto skip_dup
; /* Same dir twice in one cmd. */
592 memmove (p
, &p
[len
+ 1], strlen (&p
[len
+ 1]) + 1); /* Copy from next \0 or : */
594 p
= strchr (p
, DIRNAME_SEPARATOR
);
601 tinybuf
[0] = DIRNAME_SEPARATOR
;
604 /* If we have already tacked on a name(s) in this command,
605 be sure they stay on the front as we tack on some
613 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
615 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
616 prefix
= strlen (temp
);
621 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
623 prefix
= strlen (name
);
636 source_info (char *ignore
, int from_tty
)
638 struct symtab
*s
= current_source_symtab
;
642 printf_filtered (_("No current source file.\n"));
645 printf_filtered (_("Current source file is %s\n"), s
->filename
);
647 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
649 printf_filtered (_("Located in %s\n"), s
->fullname
);
651 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
652 s
->nlines
== 1 ? "" : "s");
654 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
655 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
656 printf_filtered (_("%s preprocessor macro info.\n"),
657 s
->macro_table
? "Includes" : "Does not include");
661 /* Return True if the file NAME exists and is a regular file. */
663 is_regular_file (const char *name
)
666 const int status
= stat (name
, &st
);
668 /* Stat should never fail except when the file does not exist.
669 If stat fails, analyze the source of error and return True
670 unless the file does not exist, to avoid returning false results
671 on obscure systems where stat does not work as expected. */
674 return (errno
!= ENOENT
);
676 return S_ISREG (st
.st_mode
);
679 /* Open a file named STRING, searching path PATH (dir names sep by some char)
680 using mode MODE in the calls to open. You cannot use this function to
681 create files (O_CREAT).
683 OPTS specifies the function behaviour in specific cases.
685 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
686 (ie pretend the first element of PATH is "."). This also indicates
687 that a slash in STRING disables searching of the path (this is
688 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
689 get that particular version of foo or an error message).
691 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
692 searched in path (we usually want this for source files but not for
695 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
696 the actual file opened (this string will always start with a "/"). We
697 have to take special pains to avoid doubling the "/" between the directory
698 and the file, sigh! Emacs gets confuzzed by this when we print the
701 If a file is found, return the descriptor.
702 Otherwise, return -1, with errno set for the last name we tried to open. */
704 /* >>>> This should only allow files of certain types,
705 >>>> eg executable, non-directory. */
707 openp (const char *path
, int opts
, const char *string
,
708 int mode
, char **filename_opened
)
717 /* The open syscall MODE parameter is not specified. */
718 gdb_assert ((mode
& O_CREAT
) == 0);
719 gdb_assert (string
!= NULL
);
721 /* A file with an empty name cannot possibly exist. Report a failure
722 without further checking.
724 This is an optimization which also defends us against buggy
725 implementations of the "stat" function. For instance, we have
726 noticed that a MinGW debugger built on Windows XP 32bits crashes
727 when the debugger is started with an empty argument. */
728 if (string
[0] == '\0')
739 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
743 if (is_regular_file (string
))
745 filename
= alloca (strlen (string
) + 1);
746 strcpy (filename
, string
);
747 fd
= open (filename
, mode
);
757 if (!(opts
& OPF_SEARCH_IN_PATH
))
758 for (i
= 0; string
[i
]; i
++)
759 if (IS_DIR_SEPARATOR (string
[i
]))
763 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
764 if (HAS_DRIVE_SPEC (string
))
765 string
= STRIP_DRIVE_SPEC (string
);
767 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
768 while (IS_DIR_SEPARATOR(string
[0]))
772 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
775 alloclen
= strlen (path
) + strlen (string
) + 2;
776 filename
= alloca (alloclen
);
778 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
780 p1
= strchr (p
, DIRNAME_SEPARATOR
);
786 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
787 && p
[2] == 'w' && p
[3] == 'd')
789 /* Name is $cwd -- insert current directory name instead. */
792 /* First, realloc the filename buffer if too short. */
793 len
= strlen (current_directory
);
794 newlen
= len
+ strlen (string
) + 2;
795 if (newlen
> alloclen
)
798 filename
= alloca (alloclen
);
800 strcpy (filename
, current_directory
);
804 /* Normal file name in path -- just use it. */
805 strncpy (filename
, p
, len
);
808 /* Don't search $cdir. It's also a magic path like $cwd, but we
809 don't have enough information to expand it. The user *could*
810 have an actual directory named '$cdir' but handling that would
811 be confusing, it would mean different things in different
812 contexts. If the user really has '$cdir' one can use './$cdir'.
813 We can get $cdir when loading scripts. When loading source files
814 $cdir must have already been expanded to the correct value. */
815 if (strcmp (filename
, "$cdir") == 0)
819 /* Remove trailing slashes. */
820 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
823 strcat (filename
+ len
, SLASH_STRING
);
824 strcat (filename
, string
);
826 if (is_regular_file (filename
))
828 fd
= open (filename
, mode
);
837 /* If a file was opened, canonicalize its filename. Use xfullpath
838 rather than gdb_realpath to avoid resolving the basename part
839 of filenames when the associated file is a symbolic link. This
840 fixes a potential inconsistency between the filenames known to
841 GDB and the filenames it prints in the annotations. */
843 *filename_opened
= NULL
;
844 else if (IS_ABSOLUTE_PATH (filename
))
845 *filename_opened
= xfullpath (filename
);
848 /* Beware the // my son, the Emacs barfs, the botch that catch... */
850 char *f
= concat (current_directory
,
851 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
853 filename
, (char *)NULL
);
855 *filename_opened
= xfullpath (f
);
864 /* This is essentially a convenience, for clients that want the behaviour
865 of openp, using source_path, but that really don't want the file to be
866 opened but want instead just to know what the full pathname is (as
867 qualified against source_path).
869 The current working directory is searched first.
871 If the file was found, this function returns 1, and FULL_PATHNAME is
872 set to the fully-qualified pathname.
874 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
876 source_full_path_of (const char *filename
, char **full_pathname
)
880 fd
= openp (source_path
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
881 O_RDONLY
, full_pathname
);
884 *full_pathname
= NULL
;
892 /* Return non-zero if RULE matches PATH, that is if the rule can be
896 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
899 const int from_len
= strlen (rule
->from
);
900 const int path_len
= strlen (path
);
903 if (path_len
< from_len
)
906 /* The substitution rules are anchored at the start of the path,
907 so the path should start with rule->from. There is no filename
908 comparison routine, so we need to extract the first FROM_LEN
909 characters from PATH first and use that to do the comparison. */
911 path_start
= alloca (from_len
+ 1);
912 strncpy (path_start
, path
, from_len
);
913 path_start
[from_len
] = '\0';
915 if (FILENAME_CMP (path_start
, rule
->from
) != 0)
918 /* Make sure that the region in the path that matches the substitution
919 rule is immediately followed by a directory separator (or the end of
920 string character). */
922 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
928 /* Find the substitute-path rule that applies to PATH and return it.
929 Return NULL if no rule applies. */
931 static struct substitute_path_rule
*
932 get_substitute_path_rule (const char *path
)
934 struct substitute_path_rule
*rule
= substitute_path_rules
;
936 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
942 /* If the user specified a source path substitution rule that applies
943 to PATH, then apply it and return the new path. This new path must
944 be deallocated afterwards.
946 Return NULL if no substitution rule was specified by the user,
947 or if no rule applied to the given PATH. */
950 rewrite_source_path (const char *path
)
952 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
959 from_len
= strlen (rule
->from
);
961 /* Compute the rewritten path and return it. */
964 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
965 strcpy (new_path
, rule
->to
);
966 strcat (new_path
, path
+ from_len
);
972 find_and_open_source (const char *filename
,
976 char *path
= source_path
;
980 /* Quick way out if we already know its full name. */
984 /* The user may have requested that source paths be rewritten
985 according to substitution rules he provided. If a substitution
986 rule applies to this path, then apply it. */
987 char *rewritten_fullname
= rewrite_source_path (*fullname
);
989 if (rewritten_fullname
!= NULL
)
992 *fullname
= rewritten_fullname
;
995 result
= open (*fullname
, OPEN_MODE
);
998 /* Call xfullpath here to be consistent with openp
999 which we use below. */
1000 char *lpath
= xfullpath (*fullname
);
1007 /* Didn't work -- free old one, try again. */
1012 if (dirname
!= NULL
)
1014 /* If necessary, rewrite the compilation directory name according
1015 to the source path substitution rules specified by the user. */
1017 char *rewritten_dirname
= rewrite_source_path (dirname
);
1019 if (rewritten_dirname
!= NULL
)
1021 make_cleanup (xfree
, rewritten_dirname
);
1022 dirname
= rewritten_dirname
;
1025 /* Replace a path entry of $cdir with the compilation directory
1028 /* We cast strstr's result in case an ANSIhole has made it const,
1029 which produces a "required warning" when assigned to a nonconst. */
1030 p
= (char *) strstr (source_path
, "$cdir");
1031 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1032 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1037 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1038 len
= p
- source_path
;
1039 strncpy (path
, source_path
, len
); /* Before $cdir */
1040 strcpy (path
+ len
, dirname
); /* new stuff */
1041 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1046 if (IS_ABSOLUTE_PATH (filename
))
1048 /* If filename is absolute path, try the source path
1049 substitution on it. */
1050 char *rewritten_filename
= rewrite_source_path (filename
);
1052 if (rewritten_filename
!= NULL
)
1054 make_cleanup (xfree
, rewritten_filename
);
1055 filename
= rewritten_filename
;
1059 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, fullname
);
1062 /* Didn't work. Try using just the basename. */
1063 p
= lbasename (filename
);
1065 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, fullname
);
1071 /* Open a source file given a symtab S. Returns a file descriptor or
1072 negative number for error.
1074 This function is a convience function to find_and_open_source. */
1077 open_source_file (struct symtab
*s
)
1082 return find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1085 /* Finds the fullname that a symtab represents.
1087 If this functions finds the fullname, it will save it in s->fullname
1088 and it will also return the value.
1090 If this function fails to find the file that this symtab represents,
1091 NULL will be returned and s->fullname will be set to NULL. */
1094 symtab_to_fullname (struct symtab
*s
)
1101 /* Use cached copy if we have it.
1102 We rely on forget_cached_source_info being called appropriately
1103 to handle cases like the file being moved. */
1107 r
= find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1118 /* Create and initialize the table S->line_charpos that records
1119 the positions of the lines in the source file, which is assumed
1120 to be open on descriptor DESC.
1121 All set S->nlines to the number of such lines. */
1124 find_source_lines (struct symtab
*s
, int desc
)
1127 char *data
, *p
, *end
;
1129 int lines_allocated
= 1000;
1135 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
1136 if (fstat (desc
, &st
) < 0)
1137 perror_with_name (s
->filename
);
1139 if (s
->objfile
&& s
->objfile
->obfd
)
1140 mtime
= s
->objfile
->mtime
;
1142 mtime
= exec_bfd_mtime
;
1144 if (mtime
&& mtime
< st
.st_mtime
)
1145 warning (_("Source file is more recent than executable."));
1148 struct cleanup
*old_cleanups
;
1150 /* st_size might be a large type, but we only support source files whose
1151 size fits in an int. */
1152 size
= (int) st
.st_size
;
1154 /* Use malloc, not alloca, because this may be pretty large, and we may
1155 run into various kinds of limits on stack size. */
1156 data
= (char *) xmalloc (size
);
1157 old_cleanups
= make_cleanup (xfree
, data
);
1159 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1160 size
= myread (desc
, data
, size
);
1162 perror_with_name (s
->filename
);
1165 line_charpos
[0] = 0;
1170 /* A newline at the end does not start a new line. */
1173 if (nlines
== lines_allocated
)
1175 lines_allocated
*= 2;
1177 (int *) xrealloc ((char *) line_charpos
,
1178 sizeof (int) * lines_allocated
);
1180 line_charpos
[nlines
++] = p
- data
;
1183 do_cleanups (old_cleanups
);
1188 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1194 /* Get full pathname and line number positions for a symtab.
1195 Return nonzero if line numbers may have changed.
1196 Set *FULLNAME to actual name of the file as found by `openp',
1197 or to 0 if the file is not found. */
1200 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1202 int desc
, linenums_changed
= 0;
1203 struct cleanup
*cleanups
;
1205 desc
= open_source_file (s
);
1212 cleanups
= make_cleanup_close (desc
);
1214 *fullname
= s
->fullname
;
1215 if (s
->line_charpos
== 0)
1216 linenums_changed
= 1;
1217 if (linenums_changed
)
1218 find_source_lines (s
, desc
);
1219 do_cleanups (cleanups
);
1220 return linenums_changed
;
1223 /* Print text describing the full name of the source file S
1224 and the line number LINE and its corresponding character position.
1225 The text starts with two Ctrl-z so that the Emacs-GDB interface
1228 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1230 Return 1 if successful, 0 if could not find the file. */
1233 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1236 if (s
->line_charpos
== 0)
1237 get_filename_and_charpos (s
, (char **) NULL
);
1238 if (s
->fullname
== 0)
1240 if (line
> s
->nlines
)
1241 /* Don't index off the end of the line_charpos array. */
1243 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1244 mid_statement
, get_objfile_arch (s
->objfile
), pc
);
1246 current_source_line
= line
;
1247 first_line_listed
= line
;
1248 last_line_listed
= line
;
1249 current_source_symtab
= s
;
1254 /* Print source lines from the file of symtab S,
1255 starting with line number LINE and stopping before line number STOPLINE. */
1257 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1260 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1266 int nlines
= stopline
- line
;
1267 struct cleanup
*cleanup
;
1268 struct ui_out
*uiout
= current_uiout
;
1270 /* Regardless of whether we can open the file, set current_source_symtab. */
1271 current_source_symtab
= s
;
1272 current_source_line
= line
;
1273 first_line_listed
= line
;
1275 /* If printing of source lines is disabled, just print file and line
1277 if (ui_out_test_flags (uiout
, ui_source_list
))
1279 /* Only prints "No such file or directory" once. */
1280 if ((s
!= last_source_visited
) || (!last_source_error
))
1282 last_source_visited
= s
;
1283 desc
= open_source_file (s
);
1287 desc
= last_source_error
;
1293 desc
= last_source_error
;
1298 if (desc
< 0 || noprint
)
1300 last_source_error
= desc
;
1304 char *name
= alloca (strlen (s
->filename
) + 100);
1305 sprintf (name
, "%d\t%s", line
, s
->filename
);
1306 print_sys_errmsg (name
, errno
);
1310 ui_out_field_int (uiout
, "line", line
);
1311 ui_out_text (uiout
, "\tin ");
1312 ui_out_field_string (uiout
, "file", s
->filename
);
1313 ui_out_text (uiout
, "\n");
1319 last_source_error
= 0;
1321 if (s
->line_charpos
== 0)
1322 find_source_lines (s
, desc
);
1324 if (line
< 1 || line
> s
->nlines
)
1327 error (_("Line number %d out of range; %s has %d lines."),
1328 line
, s
->filename
, s
->nlines
);
1331 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1334 perror_with_name (s
->filename
);
1337 stream
= fdopen (desc
, FDOPEN_MODE
);
1339 cleanup
= make_cleanup_fclose (stream
);
1341 while (nlines
-- > 0)
1348 last_line_listed
= current_source_line
;
1349 sprintf (buf
, "%d\t", current_source_line
++);
1350 ui_out_text (uiout
, buf
);
1353 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1355 sprintf (buf
, "^%c", c
+ 0100);
1356 ui_out_text (uiout
, buf
);
1359 ui_out_text (uiout
, "^?");
1362 /* Skip a \r character, but only before a \n. */
1363 int c1
= fgetc (stream
);
1366 printf_filtered ("^%c", c
+ 0100);
1368 ungetc (c1
, stream
);
1372 sprintf (buf
, "%c", c
);
1373 ui_out_text (uiout
, buf
);
1376 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1379 do_cleanups (cleanup
);
1382 /* Show source lines from the file of symtab S, starting with line
1383 number LINE and stopping before line number STOPLINE. If this is
1384 not the command line version, then the source is shown in the source
1385 window otherwise it is simply printed. */
1388 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1390 print_source_lines_base (s
, line
, stopline
, noerror
);
1393 /* Print info on range of pc's in a specified line. */
1396 line_info (char *arg
, int from_tty
)
1398 struct symtabs_and_lines sals
;
1399 struct symtab_and_line sal
;
1400 CORE_ADDR start_pc
, end_pc
;
1402 struct cleanup
*cleanups
;
1404 init_sal (&sal
); /* initialize to zeroes */
1408 sal
.symtab
= current_source_symtab
;
1409 sal
.pspace
= current_program_space
;
1410 sal
.line
= last_line_listed
;
1412 sals
.sals
= (struct symtab_and_line
*)
1413 xmalloc (sizeof (struct symtab_and_line
));
1418 sals
= decode_line_spec_1 (arg
, DECODE_LINE_LIST_MODE
);
1423 cleanups
= make_cleanup (xfree
, sals
.sals
);
1425 /* C++ More than one line may have been specified, as when the user
1426 specifies an overloaded function name. Print info on them all. */
1427 for (i
= 0; i
< sals
.nelts
; i
++)
1430 if (sal
.pspace
!= current_program_space
)
1433 if (sal
.symtab
== 0)
1435 struct gdbarch
*gdbarch
= get_current_arch ();
1437 printf_filtered (_("No line number information available"));
1440 /* This is useful for "info line *0x7f34". If we can't tell the
1441 user about a source line, at least let them have the symbolic
1443 printf_filtered (" for address ");
1445 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1448 printf_filtered (".");
1449 printf_filtered ("\n");
1451 else if (sal
.line
> 0
1452 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1454 struct gdbarch
*gdbarch
= get_objfile_arch (sal
.symtab
->objfile
);
1456 if (start_pc
== end_pc
)
1458 printf_filtered ("Line %d of \"%s\"",
1459 sal
.line
, sal
.symtab
->filename
);
1461 printf_filtered (" is at address ");
1462 print_address (gdbarch
, start_pc
, gdb_stdout
);
1464 printf_filtered (" but contains no code.\n");
1468 printf_filtered ("Line %d of \"%s\"",
1469 sal
.line
, sal
.symtab
->filename
);
1471 printf_filtered (" starts at address ");
1472 print_address (gdbarch
, start_pc
, gdb_stdout
);
1474 printf_filtered (" and ends at ");
1475 print_address (gdbarch
, end_pc
, gdb_stdout
);
1476 printf_filtered (".\n");
1479 /* x/i should display this line's code. */
1480 set_next_address (gdbarch
, start_pc
);
1482 /* Repeating "info line" should do the following line. */
1483 last_line_listed
= sal
.line
+ 1;
1485 /* If this is the only line, show the source code. If it could
1486 not find the file, don't do anything special. */
1487 if (annotation_level
&& sals
.nelts
== 1)
1488 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1491 /* Is there any case in which we get here, and have an address
1492 which the user would want to see? If we have debugging symbols
1493 and no line numbers? */
1494 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1495 sal
.line
, sal
.symtab
->filename
);
1497 do_cleanups (cleanups
);
1500 /* Commands to search the source file for a regexp. */
1503 forward_search_command (char *regex
, int from_tty
)
1510 struct cleanup
*cleanups
;
1512 line
= last_line_listed
+ 1;
1514 msg
= (char *) re_comp (regex
);
1516 error (("%s"), msg
);
1518 if (current_source_symtab
== 0)
1519 select_source_symtab (0);
1521 desc
= open_source_file (current_source_symtab
);
1523 perror_with_name (current_source_symtab
->filename
);
1524 cleanups
= make_cleanup_close (desc
);
1526 if (current_source_symtab
->line_charpos
== 0)
1527 find_source_lines (current_source_symtab
, desc
);
1529 if (line
< 1 || line
> current_source_symtab
->nlines
)
1530 error (_("Expression not found"));
1532 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1533 perror_with_name (current_source_symtab
->filename
);
1535 discard_cleanups (cleanups
);
1536 stream
= fdopen (desc
, FDOPEN_MODE
);
1538 cleanups
= make_cleanup_fclose (stream
);
1541 static char *buf
= NULL
;
1543 int cursize
, newsize
;
1546 buf
= xmalloc (cursize
);
1555 if (p
- buf
== cursize
)
1557 newsize
= cursize
+ cursize
/ 2;
1558 buf
= xrealloc (buf
, newsize
);
1563 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1565 /* Remove the \r, if any, at the end of the line, otherwise
1566 regular expressions that end with $ or \n won't work. */
1567 if (p
- buf
> 1 && p
[-2] == '\r')
1573 /* We now have a source line in buf, null terminate and match. */
1575 if (re_exec (buf
) > 0)
1578 do_cleanups (cleanups
);
1579 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1580 set_internalvar_integer (lookup_internalvar ("_"), line
);
1581 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1587 printf_filtered (_("Expression not found\n"));
1588 do_cleanups (cleanups
);
1592 reverse_search_command (char *regex
, int from_tty
)
1599 struct cleanup
*cleanups
;
1601 line
= last_line_listed
- 1;
1603 msg
= (char *) re_comp (regex
);
1605 error (("%s"), msg
);
1607 if (current_source_symtab
== 0)
1608 select_source_symtab (0);
1610 desc
= open_source_file (current_source_symtab
);
1612 perror_with_name (current_source_symtab
->filename
);
1613 cleanups
= make_cleanup_close (desc
);
1615 if (current_source_symtab
->line_charpos
== 0)
1616 find_source_lines (current_source_symtab
, desc
);
1618 if (line
< 1 || line
> current_source_symtab
->nlines
)
1619 error (_("Expression not found"));
1621 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1622 perror_with_name (current_source_symtab
->filename
);
1624 discard_cleanups (cleanups
);
1625 stream
= fdopen (desc
, FDOPEN_MODE
);
1627 cleanups
= make_cleanup_fclose (stream
);
1630 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1631 char buf
[4096]; /* Should be reasonable??? */
1641 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1643 /* Remove the \r, if any, at the end of the line, otherwise
1644 regular expressions that end with $ or \n won't work. */
1645 if (p
- buf
> 1 && p
[-2] == '\r')
1651 /* We now have a source line in buf; null terminate and match. */
1653 if (re_exec (buf
) > 0)
1656 do_cleanups (cleanups
);
1657 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1658 set_internalvar_integer (lookup_internalvar ("_"), line
);
1659 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1663 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1665 do_cleanups (cleanups
);
1666 perror_with_name (current_source_symtab
->filename
);
1670 printf_filtered (_("Expression not found\n"));
1671 do_cleanups (cleanups
);
1675 /* If the last character of PATH is a directory separator, then strip it. */
1678 strip_trailing_directory_separator (char *path
)
1680 const int last
= strlen (path
) - 1;
1683 return; /* No stripping is needed if PATH is the empty string. */
1685 if (IS_DIR_SEPARATOR (path
[last
]))
1689 /* Return the path substitution rule that matches FROM.
1690 Return NULL if no rule matches. */
1692 static struct substitute_path_rule
*
1693 find_substitute_path_rule (const char *from
)
1695 struct substitute_path_rule
*rule
= substitute_path_rules
;
1697 while (rule
!= NULL
)
1699 if (FILENAME_CMP (rule
->from
, from
) == 0)
1707 /* Add a new substitute-path rule at the end of the current list of rules.
1708 The new rule will replace FROM into TO. */
1711 add_substitute_path_rule (char *from
, char *to
)
1713 struct substitute_path_rule
*rule
;
1714 struct substitute_path_rule
*new_rule
;
1716 new_rule
= xmalloc (sizeof (struct substitute_path_rule
));
1717 new_rule
->from
= xstrdup (from
);
1718 new_rule
->to
= xstrdup (to
);
1719 new_rule
->next
= NULL
;
1721 /* If the list of rules are empty, then insert the new rule
1722 at the head of the list. */
1724 if (substitute_path_rules
== NULL
)
1726 substitute_path_rules
= new_rule
;
1730 /* Otherwise, skip to the last rule in our list and then append
1733 rule
= substitute_path_rules
;
1734 while (rule
->next
!= NULL
)
1737 rule
->next
= new_rule
;
1740 /* Remove the given source path substitution rule from the current list
1741 of rules. The memory allocated for that rule is also deallocated. */
1744 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1746 if (rule
== substitute_path_rules
)
1747 substitute_path_rules
= rule
->next
;
1750 struct substitute_path_rule
*prev
= substitute_path_rules
;
1752 while (prev
!= NULL
&& prev
->next
!= rule
)
1755 gdb_assert (prev
!= NULL
);
1757 prev
->next
= rule
->next
;
1765 /* Implement the "show substitute-path" command. */
1768 show_substitute_path_command (char *args
, int from_tty
)
1770 struct substitute_path_rule
*rule
= substitute_path_rules
;
1774 argv
= gdb_buildargv (args
);
1775 make_cleanup_freeargv (argv
);
1777 /* We expect zero or one argument. */
1779 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1780 error (_("Too many arguments in command"));
1782 if (argv
!= NULL
&& argv
[0] != NULL
)
1785 /* Print the substitution rules. */
1789 (_("Source path substitution rule matching `%s':\n"), from
);
1791 printf_filtered (_("List of all source path substitution rules:\n"));
1793 while (rule
!= NULL
)
1795 if (from
== NULL
|| FILENAME_CMP (rule
->from
, from
) == 0)
1796 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1801 /* Implement the "unset substitute-path" command. */
1804 unset_substitute_path_command (char *args
, int from_tty
)
1806 struct substitute_path_rule
*rule
= substitute_path_rules
;
1807 char **argv
= gdb_buildargv (args
);
1811 /* This function takes either 0 or 1 argument. */
1813 make_cleanup_freeargv (argv
);
1814 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1815 error (_("Incorrect usage, too many arguments in command"));
1817 if (argv
!= NULL
&& argv
[0] != NULL
)
1820 /* If the user asked for all the rules to be deleted, ask him
1821 to confirm and give him a chance to abort before the action
1825 && !query (_("Delete all source path substitution rules? ")))
1826 error (_("Canceled"));
1828 /* Delete the rule matching the argument. No argument means that
1829 all rules should be deleted. */
1831 while (rule
!= NULL
)
1833 struct substitute_path_rule
*next
= rule
->next
;
1835 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1837 delete_substitute_path_rule (rule
);
1844 /* If the user asked for a specific rule to be deleted but
1845 we could not find it, then report an error. */
1847 if (from
!= NULL
&& !rule_found
)
1848 error (_("No substitution rule defined for `%s'"), from
);
1850 forget_cached_source_info ();
1853 /* Add a new source path substitution rule. */
1856 set_substitute_path_command (char *args
, int from_tty
)
1859 struct substitute_path_rule
*rule
;
1861 argv
= gdb_buildargv (args
);
1862 make_cleanup_freeargv (argv
);
1864 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1865 error (_("Incorrect usage, too few arguments in command"));
1867 if (argv
[2] != NULL
)
1868 error (_("Incorrect usage, too many arguments in command"));
1870 if (*(argv
[0]) == '\0')
1871 error (_("First argument must be at least one character long"));
1873 /* Strip any trailing directory separator character in either FROM
1874 or TO. The substitution rule already implicitly contains them. */
1875 strip_trailing_directory_separator (argv
[0]);
1876 strip_trailing_directory_separator (argv
[1]);
1878 /* If a rule with the same "from" was previously defined, then
1879 delete it. This new rule replaces it. */
1881 rule
= find_substitute_path_rule (argv
[0]);
1883 delete_substitute_path_rule (rule
);
1885 /* Insert the new substitution rule. */
1887 add_substitute_path_rule (argv
[0], argv
[1]);
1888 forget_cached_source_info ();
1893 _initialize_source (void)
1895 struct cmd_list_element
*c
;
1897 current_source_symtab
= 0;
1898 init_source_path ();
1900 /* The intention is to use POSIX Basic Regular Expressions.
1901 Always use the GNU regex routine for consistency across all hosts.
1902 Our current GNU regex.c does not have all the POSIX features, so this is
1903 just an approximation. */
1904 re_set_syntax (RE_SYNTAX_GREP
);
1906 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1907 Add directory DIR to beginning of search path for source files.\n\
1908 Forget cached info on source file locations and line positions.\n\
1909 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1910 directory in which the source file was compiled into object code.\n\
1911 With no argument, reset the search path to $cdir:$cwd, the default."),
1915 add_com_alias ("use", "directory", class_files
, 0);
1917 set_cmd_completer (c
, filename_completer
);
1919 add_setshow_optional_filename_cmd ("directories",
1923 Set the search path for finding source files."),
1925 Show the search path for finding source files."),
1927 $cwd in the path means the current working directory.\n\
1928 $cdir in the path means the compilation directory of the source file.\n\
1929 GDB ensures the search path always ends with $cdir:$cwd by\n\
1930 appending these directories if necessary.\n\
1931 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1932 set_directories_command
,
1933 show_directories_command
,
1934 &setlist
, &showlist
);
1938 add_com_alias ("D", "directory", class_files
, 0);
1939 add_cmd ("ld", no_class
, show_directories_1
, _("\
1940 Current search path for finding source files.\n\
1941 $cwd in the path means the current working directory.\n\
1942 $cdir in the path means the compilation directory of the source file."),
1946 add_info ("source", source_info
,
1947 _("Information about the current source file."));
1949 add_info ("line", line_info
, _("\
1950 Core addresses of the code for a source line.\n\
1951 Line can be specified as\n\
1952 LINENUM, to list around that line in current file,\n\
1953 FILE:LINENUM, to list around that line in that file,\n\
1954 FUNCTION, to list around beginning of that function,\n\
1955 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1956 Default is to describe the last source line that was listed.\n\n\
1957 This sets the default address for \"x\" to the line's first instruction\n\
1958 so that \"x/i\" suffices to start examining the machine code.\n\
1959 The address is also stored as the value of \"$_\"."));
1961 add_com ("forward-search", class_files
, forward_search_command
, _("\
1962 Search for regular expression (see regex(3)) from last line listed.\n\
1963 The matching line number is also stored as the value of \"$_\"."));
1964 add_com_alias ("search", "forward-search", class_files
, 0);
1966 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1967 Search backward for regular expression (see regex(3)) from last line listed.\n\
1968 The matching line number is also stored as the value of \"$_\"."));
1969 add_com_alias ("rev", "reverse-search", class_files
, 1);
1973 add_com_alias ("/", "forward-search", class_files
, 0);
1974 add_com_alias ("?", "reverse-search", class_files
, 0);
1977 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
1978 Set number of source lines gdb will list by default."), _("\
1979 Show number of source lines gdb will list by default."), NULL
,
1982 &setlist
, &showlist
);
1984 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
1986 Usage: set substitute-path FROM TO\n\
1987 Add a substitution rule replacing FROM into TO in source file names.\n\
1988 If a substitution rule was previously set for FROM, the old rule\n\
1989 is replaced by the new one."),
1992 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
1994 Usage: unset substitute-path [FROM]\n\
1995 Delete the rule for substituting FROM in source file names. If FROM\n\
1996 is not specified, all substituting rules are deleted.\n\
1997 If the debugger cannot find a rule for FROM, it will display a warning."),
2000 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
2002 Usage: show substitute-path [FROM]\n\
2003 Print the rule for substituting FROM in source file names. If FROM\n\
2004 is not specified, print all substitution rules."),