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 line positions and file names for the symtabs in a
339 particular objfile. */
342 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
346 ALL_OBJFILE_SYMTABS (objfile
, s
)
348 if (s
->line_charpos
!= NULL
)
350 xfree (s
->line_charpos
);
351 s
->line_charpos
= NULL
;
353 if (s
->fullname
!= NULL
)
361 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
364 /* Forget what we learned about line positions in source files, and
365 which directories contain them; must check again now since files
366 may be found in a different directory now. */
369 forget_cached_source_info (void)
371 struct program_space
*pspace
;
372 struct objfile
*objfile
;
375 ALL_PSPACE_OBJFILES (pspace
, objfile
)
377 forget_cached_source_info_for_objfile (objfile
);
380 last_source_visited
= NULL
;
384 init_source_path (void)
388 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
389 source_path
= xstrdup (buf
);
390 forget_cached_source_info ();
393 /* Add zero or more directories to the front of the source path. */
396 directory_command (char *dirname
, int from_tty
)
399 /* FIXME, this goes to "delete dir"... */
402 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
410 mod_path (dirname
, &source_path
);
411 forget_cached_source_info ();
414 show_directories_1 ((char *) 0, from_tty
);
417 /* Add a path given with the -d command line switch.
418 This will not be quoted so we must not treat spaces as separators. */
421 directory_switch (char *dirname
, int from_tty
)
423 add_path (dirname
, &source_path
, 0);
426 /* Add zero or more directories to the front of an arbitrary path. */
429 mod_path (char *dirname
, char **which_path
)
431 add_path (dirname
, which_path
, 1);
434 /* Workhorse of mod_path. Takes an extra argument to determine
435 if dirname should be parsed for separators that indicate multiple
436 directories. This allows for interfaces that pre-parse the dirname
437 and allow specification of traditional separator characters such
441 add_path (char *dirname
, char **which_path
, int parse_separators
)
443 char *old
= *which_path
;
452 if (parse_separators
)
454 /* This will properly parse the space and tab separators
455 and any quotes that may exist. DIRNAME_SEPARATOR will
456 be dealt with later. */
457 argv
= gdb_buildargv (dirname
);
458 make_cleanup_freeargv (argv
);
464 arg
= xstrdup (dirname
);
465 make_cleanup (xfree
, arg
);
475 char *separator
= NULL
;
477 /* Spaces and tabs will have been removed by buildargv().
478 The directories will there be split into a list but
479 each entry may still contain DIRNAME_SEPARATOR. */
480 if (parse_separators
)
481 separator
= strchr (name
, DIRNAME_SEPARATOR
);
484 p
= arg
= name
+ strlen (name
);
489 while (*arg
== DIRNAME_SEPARATOR
)
493 /* If there are no more directories in this argument then start
494 on the next argument next time round the loop (if any). */
496 arg
= parse_separators
? argv
[++argv_index
] : NULL
;
499 /* name is the start of the directory.
500 p is the separator (or null) following the end. */
502 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
503 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
504 /* On MS-DOS and MS-Windows, h:\ is different from h: */
505 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
507 && IS_DIR_SEPARATOR (p
[-1]))
508 /* Sigh. "foo/" => "foo" */
512 while (p
> name
&& p
[-1] == '.')
516 /* "." => getwd (). */
517 name
= current_directory
;
520 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
530 /* "...foo/." => "...foo". */
541 name
= tilde_expand (name
);
542 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
543 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
544 name
= concat (name
, ".", (char *)NULL
);
546 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
547 name
= concat (current_directory
, SLASH_STRING
, name
, (char *)NULL
);
549 name
= savestring (name
, p
- name
);
550 make_cleanup (xfree
, name
);
552 /* Unless it's a variable, check existence. */
555 /* These are warnings, not errors, since we don't want a
556 non-existent directory in a .gdbinit file to stop processing
557 of the .gdbinit file.
559 Whether they get added to the path is more debatable. Current
560 answer is yes, in case the user wants to go make the directory
561 or whatever. If the directory continues to not exist/not be
562 a directory/etc, then having them in the path should be
564 if (stat (name
, &st
) < 0)
566 int save_errno
= errno
;
568 fprintf_unfiltered (gdb_stderr
, "Warning: ");
569 print_sys_errmsg (name
, save_errno
);
571 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
572 warning (_("%s is not a directory."), name
);
577 unsigned int len
= strlen (name
);
582 /* FIXME: we should use realpath() or its work-alike
583 before comparing. Then all the code above which
584 removes excess slashes and dots could simply go away. */
585 if (!filename_ncmp (p
, name
, len
)
586 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
588 /* Found it in the search path, remove old copy. */
590 p
--; /* Back over leading separator. */
591 if (prefix
> p
- *which_path
)
592 goto skip_dup
; /* Same dir twice in one cmd. */
593 strcpy (p
, &p
[len
+ 1]); /* Copy from next \0 or : */
595 p
= strchr (p
, DIRNAME_SEPARATOR
);
605 tinybuf
[0] = DIRNAME_SEPARATOR
;
608 /* If we have already tacked on a name(s) in this command,
609 be sure they stay on the front as we tack on some
617 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
619 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
620 prefix
= strlen (temp
);
625 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
627 prefix
= strlen (name
);
641 source_info (char *ignore
, int from_tty
)
643 struct symtab
*s
= current_source_symtab
;
647 printf_filtered (_("No current source file.\n"));
650 printf_filtered (_("Current source file is %s\n"), s
->filename
);
652 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
654 printf_filtered (_("Located in %s\n"), s
->fullname
);
656 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
657 s
->nlines
== 1 ? "" : "s");
659 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
660 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
661 printf_filtered (_("%s preprocessor macro info.\n"),
662 s
->macro_table
? "Includes" : "Does not include");
666 /* Return True if the file NAME exists and is a regular file. */
668 is_regular_file (const char *name
)
671 const int status
= stat (name
, &st
);
673 /* Stat should never fail except when the file does not exist.
674 If stat fails, analyze the source of error and return True
675 unless the file does not exist, to avoid returning false results
676 on obscure systems where stat does not work as expected. */
679 return (errno
!= ENOENT
);
681 return S_ISREG (st
.st_mode
);
684 /* Open a file named STRING, searching path PATH (dir names sep by some char)
685 using mode MODE in the calls to open. You cannot use this function to
686 create files (O_CREAT).
688 OPTS specifies the function behaviour in specific cases.
690 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
691 (ie pretend the first element of PATH is "."). This also indicates
692 that a slash in STRING disables searching of the path (this is
693 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
694 get that particular version of foo or an error message).
696 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
697 searched in path (we usually want this for source files but not for
700 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
701 the actual file opened (this string will always start with a "/"). We
702 have to take special pains to avoid doubling the "/" between the directory
703 and the file, sigh! Emacs gets confuzzed by this when we print the
706 If a file is found, return the descriptor.
707 Otherwise, return -1, with errno set for the last name we tried to open. */
709 /* >>>> This should only allow files of certain types,
710 >>>> eg executable, non-directory. */
712 openp (const char *path
, int opts
, const char *string
,
713 int mode
, char **filename_opened
)
722 /* The open syscall MODE parameter is not specified. */
723 gdb_assert ((mode
& O_CREAT
) == 0);
724 gdb_assert (string
!= NULL
);
726 /* A file with an empty name cannot possibly exist. Report a failure
727 without further checking.
729 This is an optimization which also defends us against buggy
730 implementations of the "stat" function. For instance, we have
731 noticed that a MinGW debugger built on Windows XP 32bits crashes
732 when the debugger is started with an empty argument. */
733 if (string
[0] == '\0')
744 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
748 if (is_regular_file (string
))
750 filename
= alloca (strlen (string
) + 1);
751 strcpy (filename
, string
);
752 fd
= open (filename
, mode
);
762 if (!(opts
& OPF_SEARCH_IN_PATH
))
763 for (i
= 0; string
[i
]; i
++)
764 if (IS_DIR_SEPARATOR (string
[i
]))
768 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
769 if (HAS_DRIVE_SPEC (string
))
770 string
= STRIP_DRIVE_SPEC (string
);
772 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
773 while (IS_DIR_SEPARATOR(string
[0]))
777 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
780 alloclen
= strlen (path
) + strlen (string
) + 2;
781 filename
= alloca (alloclen
);
783 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
785 p1
= strchr (p
, DIRNAME_SEPARATOR
);
791 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
792 && p
[2] == 'w' && p
[3] == 'd')
794 /* Name is $cwd -- insert current directory name instead. */
797 /* First, realloc the filename buffer if too short. */
798 len
= strlen (current_directory
);
799 newlen
= len
+ strlen (string
) + 2;
800 if (newlen
> alloclen
)
803 filename
= alloca (alloclen
);
805 strcpy (filename
, current_directory
);
809 /* Normal file name in path -- just use it. */
810 strncpy (filename
, p
, len
);
813 /* Don't search $cdir. It's also a magic path like $cwd, but we
814 don't have enough information to expand it. The user *could*
815 have an actual directory named '$cdir' but handling that would
816 be confusing, it would mean different things in different
817 contexts. If the user really has '$cdir' one can use './$cdir'.
818 We can get $cdir when loading scripts. When loading source files
819 $cdir must have already been expanded to the correct value. */
820 if (strcmp (filename
, "$cdir") == 0)
824 /* Remove trailing slashes. */
825 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
828 strcat (filename
+ len
, SLASH_STRING
);
829 strcat (filename
, string
);
831 if (is_regular_file (filename
))
833 fd
= open (filename
, mode
);
842 /* If a file was opened, canonicalize its filename. Use xfullpath
843 rather than gdb_realpath to avoid resolving the basename part
844 of filenames when the associated file is a symbolic link. This
845 fixes a potential inconsistency between the filenames known to
846 GDB and the filenames it prints in the annotations. */
848 *filename_opened
= NULL
;
849 else if (IS_ABSOLUTE_PATH (filename
))
850 *filename_opened
= xfullpath (filename
);
853 /* Beware the // my son, the Emacs barfs, the botch that catch... */
855 char *f
= concat (current_directory
,
856 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
858 filename
, (char *)NULL
);
860 *filename_opened
= xfullpath (f
);
869 /* This is essentially a convenience, for clients that want the behaviour
870 of openp, using source_path, but that really don't want the file to be
871 opened but want instead just to know what the full pathname is (as
872 qualified against source_path).
874 The current working directory is searched first.
876 If the file was found, this function returns 1, and FULL_PATHNAME is
877 set to the fully-qualified pathname.
879 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
881 source_full_path_of (const char *filename
, char **full_pathname
)
885 fd
= openp (source_path
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
886 O_RDONLY
, full_pathname
);
889 *full_pathname
= NULL
;
897 /* Return non-zero if RULE matches PATH, that is if the rule can be
901 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
904 const int from_len
= strlen (rule
->from
);
905 const int path_len
= strlen (path
);
908 if (path_len
< from_len
)
911 /* The substitution rules are anchored at the start of the path,
912 so the path should start with rule->from. There is no filename
913 comparison routine, so we need to extract the first FROM_LEN
914 characters from PATH first and use that to do the comparison. */
916 path_start
= alloca (from_len
+ 1);
917 strncpy (path_start
, path
, from_len
);
918 path_start
[from_len
] = '\0';
920 if (FILENAME_CMP (path_start
, rule
->from
) != 0)
923 /* Make sure that the region in the path that matches the substitution
924 rule is immediately followed by a directory separator (or the end of
925 string character). */
927 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
933 /* Find the substitute-path rule that applies to PATH and return it.
934 Return NULL if no rule applies. */
936 static struct substitute_path_rule
*
937 get_substitute_path_rule (const char *path
)
939 struct substitute_path_rule
*rule
= substitute_path_rules
;
941 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
947 /* If the user specified a source path substitution rule that applies
948 to PATH, then apply it and return the new path. This new path must
949 be deallocated afterwards.
951 Return NULL if no substitution rule was specified by the user,
952 or if no rule applied to the given PATH. */
955 rewrite_source_path (const char *path
)
957 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
964 from_len
= strlen (rule
->from
);
966 /* Compute the rewritten path and return it. */
969 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
970 strcpy (new_path
, rule
->to
);
971 strcat (new_path
, path
+ from_len
);
976 /* This function is capable of finding the absolute path to a
977 source file, and opening it, provided you give it a FILENAME. Both the
978 DIRNAME and FULLNAME are only added suggestions on where to find the file.
980 FILENAME should be the filename to open.
981 DIRNAME is the compilation directory of a particular source file.
982 Only some debug formats provide this info.
983 FULLNAME can be the last known absolute path to the file in question.
984 Space for the path must have been malloc'd. If a path substitution
985 is applied we free the old value and set a new one.
988 A valid file descriptor is returned (the return value is positive).
989 FULLNAME is set to the absolute path to the file just opened.
990 The caller is responsible for freeing FULLNAME.
993 An invalid file descriptor is returned (the return value is negative).
994 FULLNAME is set to NULL. */
997 find_and_open_source (const char *filename
,
1001 char *path
= source_path
;
1005 /* Quick way out if we already know its full name. */
1009 /* The user may have requested that source paths be rewritten
1010 according to substitution rules he provided. If a substitution
1011 rule applies to this path, then apply it. */
1012 char *rewritten_fullname
= rewrite_source_path (*fullname
);
1014 if (rewritten_fullname
!= NULL
)
1017 *fullname
= rewritten_fullname
;
1020 result
= open (*fullname
, OPEN_MODE
);
1023 /* Didn't work -- free old one, try again. */
1028 if (dirname
!= NULL
)
1030 /* If necessary, rewrite the compilation directory name according
1031 to the source path substitution rules specified by the user. */
1033 char *rewritten_dirname
= rewrite_source_path (dirname
);
1035 if (rewritten_dirname
!= NULL
)
1037 make_cleanup (xfree
, rewritten_dirname
);
1038 dirname
= rewritten_dirname
;
1041 /* Replace a path entry of $cdir with the compilation directory
1044 /* We cast strstr's result in case an ANSIhole has made it const,
1045 which produces a "required warning" when assigned to a nonconst. */
1046 p
= (char *) strstr (source_path
, "$cdir");
1047 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1048 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1053 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1054 len
= p
- source_path
;
1055 strncpy (path
, source_path
, len
); /* Before $cdir */
1056 strcpy (path
+ len
, dirname
); /* new stuff */
1057 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1062 if (IS_ABSOLUTE_PATH (filename
))
1064 /* If filename is absolute path, try the source path
1065 substitution on it. */
1066 char *rewritten_filename
= rewrite_source_path (filename
);
1068 if (rewritten_filename
!= NULL
)
1070 make_cleanup (xfree
, rewritten_filename
);
1071 filename
= rewritten_filename
;
1075 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, fullname
);
1078 /* Didn't work. Try using just the basename. */
1079 p
= lbasename (filename
);
1081 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, fullname
);
1087 /* Open a source file given a symtab S. Returns a file descriptor or
1088 negative number for error.
1090 This function is a convience function to find_and_open_source. */
1093 open_source_file (struct symtab
*s
)
1098 return find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1101 /* Finds the fullname that a symtab represents.
1103 If this functions finds the fullname, it will save it in s->fullname
1104 and it will also return the value.
1106 If this function fails to find the file that this symtab represents,
1107 NULL will be returned and s->fullname will be set to NULL. */
1110 symtab_to_fullname (struct symtab
*s
)
1117 /* Use cached copy if we have it.
1118 We rely on forget_cached_source_info being called appropriately
1119 to handle cases like the file being moved. */
1123 r
= find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1134 /* Create and initialize the table S->line_charpos that records
1135 the positions of the lines in the source file, which is assumed
1136 to be open on descriptor DESC.
1137 All set S->nlines to the number of such lines. */
1140 find_source_lines (struct symtab
*s
, int desc
)
1143 char *data
, *p
, *end
;
1145 int lines_allocated
= 1000;
1151 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
1152 if (fstat (desc
, &st
) < 0)
1153 perror_with_name (s
->filename
);
1155 if (s
->objfile
&& s
->objfile
->obfd
)
1156 mtime
= s
->objfile
->mtime
;
1158 mtime
= exec_bfd_mtime
;
1160 if (mtime
&& mtime
< st
.st_mtime
)
1161 warning (_("Source file is more recent than executable."));
1164 struct cleanup
*old_cleanups
;
1166 /* st_size might be a large type, but we only support source files whose
1167 size fits in an int. */
1168 size
= (int) st
.st_size
;
1170 /* Use malloc, not alloca, because this may be pretty large, and we may
1171 run into various kinds of limits on stack size. */
1172 data
= (char *) xmalloc (size
);
1173 old_cleanups
= make_cleanup (xfree
, data
);
1175 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1176 size
= myread (desc
, data
, size
);
1178 perror_with_name (s
->filename
);
1181 line_charpos
[0] = 0;
1186 /* A newline at the end does not start a new line. */
1189 if (nlines
== lines_allocated
)
1191 lines_allocated
*= 2;
1193 (int *) xrealloc ((char *) line_charpos
,
1194 sizeof (int) * lines_allocated
);
1196 line_charpos
[nlines
++] = p
- data
;
1199 do_cleanups (old_cleanups
);
1204 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1210 /* Get full pathname and line number positions for a symtab.
1211 Return nonzero if line numbers may have changed.
1212 Set *FULLNAME to actual name of the file as found by `openp',
1213 or to 0 if the file is not found. */
1216 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1218 int desc
, linenums_changed
= 0;
1219 struct cleanup
*cleanups
;
1221 desc
= open_source_file (s
);
1228 cleanups
= make_cleanup_close (desc
);
1230 *fullname
= s
->fullname
;
1231 if (s
->line_charpos
== 0)
1232 linenums_changed
= 1;
1233 if (linenums_changed
)
1234 find_source_lines (s
, desc
);
1235 do_cleanups (cleanups
);
1236 return linenums_changed
;
1239 /* Print text describing the full name of the source file S
1240 and the line number LINE and its corresponding character position.
1241 The text starts with two Ctrl-z so that the Emacs-GDB interface
1244 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1246 Return 1 if successful, 0 if could not find the file. */
1249 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1252 if (s
->line_charpos
== 0)
1253 get_filename_and_charpos (s
, (char **) NULL
);
1254 if (s
->fullname
== 0)
1256 if (line
> s
->nlines
)
1257 /* Don't index off the end of the line_charpos array. */
1259 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1260 mid_statement
, get_objfile_arch (s
->objfile
), pc
);
1262 current_source_line
= line
;
1263 first_line_listed
= line
;
1264 last_line_listed
= line
;
1265 current_source_symtab
= s
;
1270 /* Print source lines from the file of symtab S,
1271 starting with line number LINE and stopping before line number STOPLINE. */
1273 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1276 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1282 int nlines
= stopline
- line
;
1283 struct cleanup
*cleanup
;
1284 struct ui_out
*uiout
= current_uiout
;
1286 /* Regardless of whether we can open the file, set current_source_symtab. */
1287 current_source_symtab
= s
;
1288 current_source_line
= line
;
1289 first_line_listed
= line
;
1291 /* If printing of source lines is disabled, just print file and line
1293 if (ui_out_test_flags (uiout
, ui_source_list
))
1295 /* Only prints "No such file or directory" once. */
1296 if ((s
!= last_source_visited
) || (!last_source_error
))
1298 last_source_visited
= s
;
1299 desc
= open_source_file (s
);
1303 desc
= last_source_error
;
1309 desc
= last_source_error
;
1314 if (desc
< 0 || noprint
)
1316 last_source_error
= desc
;
1320 char *name
= alloca (strlen (s
->filename
) + 100);
1321 sprintf (name
, "%d\t%s", line
, s
->filename
);
1322 print_sys_errmsg (name
, errno
);
1326 ui_out_field_int (uiout
, "line", line
);
1327 ui_out_text (uiout
, "\tin ");
1328 ui_out_field_string (uiout
, "file", s
->filename
);
1329 ui_out_text (uiout
, "\n");
1335 last_source_error
= 0;
1337 if (s
->line_charpos
== 0)
1338 find_source_lines (s
, desc
);
1340 if (line
< 1 || line
> s
->nlines
)
1343 error (_("Line number %d out of range; %s has %d lines."),
1344 line
, s
->filename
, s
->nlines
);
1347 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1350 perror_with_name (s
->filename
);
1353 stream
= fdopen (desc
, FDOPEN_MODE
);
1355 cleanup
= make_cleanup_fclose (stream
);
1357 while (nlines
-- > 0)
1364 last_line_listed
= current_source_line
;
1365 sprintf (buf
, "%d\t", current_source_line
++);
1366 ui_out_text (uiout
, buf
);
1369 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1371 sprintf (buf
, "^%c", c
+ 0100);
1372 ui_out_text (uiout
, buf
);
1375 ui_out_text (uiout
, "^?");
1378 /* Skip a \r character, but only before a \n. */
1379 int c1
= fgetc (stream
);
1382 printf_filtered ("^%c", c
+ 0100);
1384 ungetc (c1
, stream
);
1388 sprintf (buf
, "%c", c
);
1389 ui_out_text (uiout
, buf
);
1392 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1395 do_cleanups (cleanup
);
1398 /* Show source lines from the file of symtab S, starting with line
1399 number LINE and stopping before line number STOPLINE. If this is
1400 not the command line version, then the source is shown in the source
1401 window otherwise it is simply printed. */
1404 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1406 print_source_lines_base (s
, line
, stopline
, noerror
);
1409 /* Print info on range of pc's in a specified line. */
1412 line_info (char *arg
, int from_tty
)
1414 struct symtabs_and_lines sals
;
1415 struct symtab_and_line sal
;
1416 CORE_ADDR start_pc
, end_pc
;
1419 init_sal (&sal
); /* initialize to zeroes */
1423 sal
.symtab
= current_source_symtab
;
1424 sal
.line
= last_line_listed
;
1426 sals
.sals
= (struct symtab_and_line
*)
1427 xmalloc (sizeof (struct symtab_and_line
));
1432 sals
= decode_line_spec_1 (arg
, 0);
1437 /* C++ More than one line may have been specified, as when the user
1438 specifies an overloaded function name. Print info on them all. */
1439 for (i
= 0; i
< sals
.nelts
; i
++)
1443 if (sal
.symtab
== 0)
1445 struct gdbarch
*gdbarch
= get_current_arch ();
1447 printf_filtered (_("No line number information available"));
1450 /* This is useful for "info line *0x7f34". If we can't tell the
1451 user about a source line, at least let them have the symbolic
1453 printf_filtered (" for address ");
1455 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1458 printf_filtered (".");
1459 printf_filtered ("\n");
1461 else if (sal
.line
> 0
1462 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1464 struct gdbarch
*gdbarch
= get_objfile_arch (sal
.symtab
->objfile
);
1466 if (start_pc
== end_pc
)
1468 printf_filtered ("Line %d of \"%s\"",
1469 sal
.line
, sal
.symtab
->filename
);
1471 printf_filtered (" is at address ");
1472 print_address (gdbarch
, start_pc
, gdb_stdout
);
1474 printf_filtered (" but contains no code.\n");
1478 printf_filtered ("Line %d of \"%s\"",
1479 sal
.line
, sal
.symtab
->filename
);
1481 printf_filtered (" starts at address ");
1482 print_address (gdbarch
, start_pc
, gdb_stdout
);
1484 printf_filtered (" and ends at ");
1485 print_address (gdbarch
, end_pc
, gdb_stdout
);
1486 printf_filtered (".\n");
1489 /* x/i should display this line's code. */
1490 set_next_address (gdbarch
, start_pc
);
1492 /* Repeating "info line" should do the following line. */
1493 last_line_listed
= sal
.line
+ 1;
1495 /* If this is the only line, show the source code. If it could
1496 not find the file, don't do anything special. */
1497 if (annotation_level
&& sals
.nelts
== 1)
1498 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1501 /* Is there any case in which we get here, and have an address
1502 which the user would want to see? If we have debugging symbols
1503 and no line numbers? */
1504 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1505 sal
.line
, sal
.symtab
->filename
);
1510 /* Commands to search the source file for a regexp. */
1513 forward_search_command (char *regex
, int from_tty
)
1520 struct cleanup
*cleanups
;
1522 line
= last_line_listed
+ 1;
1524 msg
= (char *) re_comp (regex
);
1526 error (("%s"), msg
);
1528 if (current_source_symtab
== 0)
1529 select_source_symtab (0);
1531 desc
= open_source_file (current_source_symtab
);
1533 perror_with_name (current_source_symtab
->filename
);
1534 cleanups
= make_cleanup_close (desc
);
1536 if (current_source_symtab
->line_charpos
== 0)
1537 find_source_lines (current_source_symtab
, desc
);
1539 if (line
< 1 || line
> current_source_symtab
->nlines
)
1540 error (_("Expression not found"));
1542 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1543 perror_with_name (current_source_symtab
->filename
);
1545 discard_cleanups (cleanups
);
1546 stream
= fdopen (desc
, FDOPEN_MODE
);
1548 cleanups
= make_cleanup_fclose (stream
);
1551 static char *buf
= NULL
;
1553 int cursize
, newsize
;
1556 buf
= xmalloc (cursize
);
1565 if (p
- buf
== cursize
)
1567 newsize
= cursize
+ cursize
/ 2;
1568 buf
= xrealloc (buf
, newsize
);
1573 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1575 /* Remove the \r, if any, at the end of the line, otherwise
1576 regular expressions that end with $ or \n won't work. */
1577 if (p
- buf
> 1 && p
[-2] == '\r')
1583 /* We now have a source line in buf, null terminate and match. */
1585 if (re_exec (buf
) > 0)
1588 do_cleanups (cleanups
);
1589 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1590 set_internalvar_integer (lookup_internalvar ("_"), line
);
1591 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1597 printf_filtered (_("Expression not found\n"));
1598 do_cleanups (cleanups
);
1602 reverse_search_command (char *regex
, int from_tty
)
1609 struct cleanup
*cleanups
;
1611 line
= last_line_listed
- 1;
1613 msg
= (char *) re_comp (regex
);
1615 error (("%s"), msg
);
1617 if (current_source_symtab
== 0)
1618 select_source_symtab (0);
1620 desc
= open_source_file (current_source_symtab
);
1622 perror_with_name (current_source_symtab
->filename
);
1623 cleanups
= make_cleanup_close (desc
);
1625 if (current_source_symtab
->line_charpos
== 0)
1626 find_source_lines (current_source_symtab
, desc
);
1628 if (line
< 1 || line
> current_source_symtab
->nlines
)
1629 error (_("Expression not found"));
1631 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1632 perror_with_name (current_source_symtab
->filename
);
1634 discard_cleanups (cleanups
);
1635 stream
= fdopen (desc
, FDOPEN_MODE
);
1637 cleanups
= make_cleanup_fclose (stream
);
1640 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1641 char buf
[4096]; /* Should be reasonable??? */
1651 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1653 /* Remove the \r, if any, at the end of the line, otherwise
1654 regular expressions that end with $ or \n won't work. */
1655 if (p
- buf
> 1 && p
[-2] == '\r')
1661 /* We now have a source line in buf; null terminate and match. */
1663 if (re_exec (buf
) > 0)
1666 do_cleanups (cleanups
);
1667 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1668 set_internalvar_integer (lookup_internalvar ("_"), line
);
1669 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1673 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1675 do_cleanups (cleanups
);
1676 perror_with_name (current_source_symtab
->filename
);
1680 printf_filtered (_("Expression not found\n"));
1681 do_cleanups (cleanups
);
1685 /* If the last character of PATH is a directory separator, then strip it. */
1688 strip_trailing_directory_separator (char *path
)
1690 const int last
= strlen (path
) - 1;
1693 return; /* No stripping is needed if PATH is the empty string. */
1695 if (IS_DIR_SEPARATOR (path
[last
]))
1699 /* Return the path substitution rule that matches FROM.
1700 Return NULL if no rule matches. */
1702 static struct substitute_path_rule
*
1703 find_substitute_path_rule (const char *from
)
1705 struct substitute_path_rule
*rule
= substitute_path_rules
;
1707 while (rule
!= NULL
)
1709 if (FILENAME_CMP (rule
->from
, from
) == 0)
1717 /* Add a new substitute-path rule at the end of the current list of rules.
1718 The new rule will replace FROM into TO. */
1721 add_substitute_path_rule (char *from
, char *to
)
1723 struct substitute_path_rule
*rule
;
1724 struct substitute_path_rule
*new_rule
;
1726 new_rule
= xmalloc (sizeof (struct substitute_path_rule
));
1727 new_rule
->from
= xstrdup (from
);
1728 new_rule
->to
= xstrdup (to
);
1729 new_rule
->next
= NULL
;
1731 /* If the list of rules are empty, then insert the new rule
1732 at the head of the list. */
1734 if (substitute_path_rules
== NULL
)
1736 substitute_path_rules
= new_rule
;
1740 /* Otherwise, skip to the last rule in our list and then append
1743 rule
= substitute_path_rules
;
1744 while (rule
->next
!= NULL
)
1747 rule
->next
= new_rule
;
1750 /* Remove the given source path substitution rule from the current list
1751 of rules. The memory allocated for that rule is also deallocated. */
1754 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1756 if (rule
== substitute_path_rules
)
1757 substitute_path_rules
= rule
->next
;
1760 struct substitute_path_rule
*prev
= substitute_path_rules
;
1762 while (prev
!= NULL
&& prev
->next
!= rule
)
1765 gdb_assert (prev
!= NULL
);
1767 prev
->next
= rule
->next
;
1775 /* Implement the "show substitute-path" command. */
1778 show_substitute_path_command (char *args
, int from_tty
)
1780 struct substitute_path_rule
*rule
= substitute_path_rules
;
1784 argv
= gdb_buildargv (args
);
1785 make_cleanup_freeargv (argv
);
1787 /* We expect zero or one argument. */
1789 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1790 error (_("Too many arguments in command"));
1792 if (argv
!= NULL
&& argv
[0] != NULL
)
1795 /* Print the substitution rules. */
1799 (_("Source path substitution rule matching `%s':\n"), from
);
1801 printf_filtered (_("List of all source path substitution rules:\n"));
1803 while (rule
!= NULL
)
1805 if (from
== NULL
|| FILENAME_CMP (rule
->from
, from
) == 0)
1806 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1811 /* Implement the "unset substitute-path" command. */
1814 unset_substitute_path_command (char *args
, int from_tty
)
1816 struct substitute_path_rule
*rule
= substitute_path_rules
;
1817 char **argv
= gdb_buildargv (args
);
1821 /* This function takes either 0 or 1 argument. */
1823 make_cleanup_freeargv (argv
);
1824 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1825 error (_("Incorrect usage, too many arguments in command"));
1827 if (argv
!= NULL
&& argv
[0] != NULL
)
1830 /* If the user asked for all the rules to be deleted, ask him
1831 to confirm and give him a chance to abort before the action
1835 && !query (_("Delete all source path substitution rules? ")))
1836 error (_("Canceled"));
1838 /* Delete the rule matching the argument. No argument means that
1839 all rules should be deleted. */
1841 while (rule
!= NULL
)
1843 struct substitute_path_rule
*next
= rule
->next
;
1845 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1847 delete_substitute_path_rule (rule
);
1854 /* If the user asked for a specific rule to be deleted but
1855 we could not find it, then report an error. */
1857 if (from
!= NULL
&& !rule_found
)
1858 error (_("No substitution rule defined for `%s'"), from
);
1860 forget_cached_source_info ();
1863 /* Add a new source path substitution rule. */
1866 set_substitute_path_command (char *args
, int from_tty
)
1869 struct substitute_path_rule
*rule
;
1871 argv
= gdb_buildargv (args
);
1872 make_cleanup_freeargv (argv
);
1874 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1875 error (_("Incorrect usage, too few arguments in command"));
1877 if (argv
[2] != NULL
)
1878 error (_("Incorrect usage, too many arguments in command"));
1880 if (*(argv
[0]) == '\0')
1881 error (_("First argument must be at least one character long"));
1883 /* Strip any trailing directory separator character in either FROM
1884 or TO. The substitution rule already implicitly contains them. */
1885 strip_trailing_directory_separator (argv
[0]);
1886 strip_trailing_directory_separator (argv
[1]);
1888 /* If a rule with the same "from" was previously defined, then
1889 delete it. This new rule replaces it. */
1891 rule
= find_substitute_path_rule (argv
[0]);
1893 delete_substitute_path_rule (rule
);
1895 /* Insert the new substitution rule. */
1897 add_substitute_path_rule (argv
[0], argv
[1]);
1898 forget_cached_source_info ();
1903 _initialize_source (void)
1905 struct cmd_list_element
*c
;
1907 current_source_symtab
= 0;
1908 init_source_path ();
1910 /* The intention is to use POSIX Basic Regular Expressions.
1911 Always use the GNU regex routine for consistency across all hosts.
1912 Our current GNU regex.c does not have all the POSIX features, so this is
1913 just an approximation. */
1914 re_set_syntax (RE_SYNTAX_GREP
);
1916 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1917 Add directory DIR to beginning of search path for source files.\n\
1918 Forget cached info on source file locations and line positions.\n\
1919 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1920 directory in which the source file was compiled into object code.\n\
1921 With no argument, reset the search path to $cdir:$cwd, the default."),
1925 add_com_alias ("use", "directory", class_files
, 0);
1927 set_cmd_completer (c
, filename_completer
);
1929 add_setshow_optional_filename_cmd ("directories",
1933 Set the search path for finding source files."),
1935 Show the search path for finding source files."),
1937 $cwd in the path means the current working directory.\n\
1938 $cdir in the path means the compilation directory of the source file.\n\
1939 GDB ensures the search path always ends with $cdir:$cwd by\n\
1940 appending these directories if necessary.\n\
1941 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1942 set_directories_command
,
1943 show_directories_command
,
1944 &setlist
, &showlist
);
1948 add_com_alias ("D", "directory", class_files
, 0);
1949 add_cmd ("ld", no_class
, show_directories_1
, _("\
1950 Current search path for finding source files.\n\
1951 $cwd in the path means the current working directory.\n\
1952 $cdir in the path means the compilation directory of the source file."),
1956 add_info ("source", source_info
,
1957 _("Information about the current source file."));
1959 add_info ("line", line_info
, _("\
1960 Core addresses of the code for a source line.\n\
1961 Line can be specified as\n\
1962 LINENUM, to list around that line in current file,\n\
1963 FILE:LINENUM, to list around that line in that file,\n\
1964 FUNCTION, to list around beginning of that function,\n\
1965 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1966 Default is to describe the last source line that was listed.\n\n\
1967 This sets the default address for \"x\" to the line's first instruction\n\
1968 so that \"x/i\" suffices to start examining the machine code.\n\
1969 The address is also stored as the value of \"$_\"."));
1971 add_com ("forward-search", class_files
, forward_search_command
, _("\
1972 Search for regular expression (see regex(3)) from last line listed.\n\
1973 The matching line number is also stored as the value of \"$_\"."));
1974 add_com_alias ("search", "forward-search", class_files
, 0);
1976 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1977 Search backward for regular expression (see regex(3)) from last line listed.\n\
1978 The matching line number is also stored as the value of \"$_\"."));
1979 add_com_alias ("rev", "reverse-search", class_files
, 1);
1983 add_com_alias ("/", "forward-search", class_files
, 0);
1984 add_com_alias ("?", "reverse-search", class_files
, 0);
1987 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
1988 Set number of source lines gdb will list by default."), _("\
1989 Show number of source lines gdb will list by default."), NULL
,
1992 &setlist
, &showlist
);
1994 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
1996 Usage: set substitute-path FROM TO\n\
1997 Add a substitution rule replacing FROM into TO in source file names.\n\
1998 If a substitution rule was previously set for FROM, the old rule\n\
1999 is replaced by the new one."),
2002 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
2004 Usage: unset substitute-path [FROM]\n\
2005 Delete the rule for substituting FROM in source file names. If FROM\n\
2006 is not specified, all substituting rules are deleted.\n\
2007 If the debugger cannot find a rule for FROM, it will display a warning."),
2010 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
2012 Usage: show substitute-path [FROM]\n\
2013 Print the rule for substituting FROM in source file names. If FROM\n\
2014 is not specified, print all substitution rules."),