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 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"
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 static void show_directories (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 will list by default is %s.\n"),
113 /* Line number of last line printed. Default for various commands.
114 current_source_line is usually, but not always, the same as this. */
116 static int last_line_listed
;
118 /* First line number listed by last listing command. */
120 static int first_line_listed
;
122 /* Saves the name of the last source file visited and a possible error code.
123 Used to prevent repeating annoying "No such file or directories" msgs */
125 static struct symtab
*last_source_visited
= NULL
;
126 static int last_source_error
= 0;
128 /* Return the first line listed by print_source_lines.
129 Used by command interpreters to request listing from
133 get_first_line_listed (void)
135 return first_line_listed
;
138 /* Return the default number of lines to print with commands like the
139 cli "list". The caller of print_source_lines must use this to
140 calculate the end line and use it in the call to print_source_lines
141 as it does not automatically use this value. */
144 get_lines_to_list (void)
146 return lines_to_list
;
149 /* Return the current source file for listing and next line to list.
150 NOTE: The returned sal pc and end fields are not valid. */
152 struct symtab_and_line
153 get_current_source_symtab_and_line (void)
155 struct symtab_and_line cursal
= { 0 };
157 cursal
.pspace
= current_source_pspace
;
158 cursal
.symtab
= current_source_symtab
;
159 cursal
.line
= current_source_line
;
166 /* If the current source file for listing is not set, try and get a default.
167 Usually called before get_current_source_symtab_and_line() is called.
168 It may err out if a default cannot be determined.
169 We must be cautious about where it is called, as it can recurse as the
170 process of determining a new default may call the caller!
171 Use get_current_source_symtab_and_line only to get whatever
172 we have without erroring out or trying to get a default. */
175 set_default_source_symtab_and_line (void)
177 struct symtab_and_line cursal
;
179 if (!have_full_symbols () && !have_partial_symbols ())
180 error (_("No symbol table is loaded. Use the \"file\" command."));
182 /* Pull in a current source symtab if necessary */
183 if (current_source_symtab
== 0)
184 select_source_symtab (0);
187 /* Return the current default file for listing and next line to list
188 (the returned sal pc and end fields are not valid.)
189 and set the current default to whatever is in SAL.
190 NOTE: The returned sal pc and end fields are not valid. */
192 struct symtab_and_line
193 set_current_source_symtab_and_line (const struct symtab_and_line
*sal
)
195 struct symtab_and_line cursal
= { 0 };
197 cursal
.pspace
= current_source_pspace
;
198 cursal
.symtab
= current_source_symtab
;
199 cursal
.line
= current_source_line
;
203 current_source_pspace
= sal
->pspace
;
204 current_source_symtab
= sal
->symtab
;
205 current_source_line
= sal
->line
;
210 /* Reset any information stored about a default file and line to print. */
213 clear_current_source_symtab_and_line (void)
215 current_source_symtab
= 0;
216 current_source_line
= 0;
219 /* Set the source file default for the "list" command to be S.
221 If S is NULL, and we don't have a default, find one. This
222 should only be called when the user actually tries to use the
223 default, since we produce an error if we can't find a reasonable
224 default. Also, since this can cause symbols to be read, doing it
225 before we need to would make things slower than necessary. */
228 select_source_symtab (struct symtab
*s
)
230 struct symtabs_and_lines sals
;
231 struct symtab_and_line sal
;
232 struct partial_symtab
*ps
;
233 struct partial_symtab
*cs_pst
= 0;
238 current_source_symtab
= s
;
239 current_source_line
= 1;
240 current_source_pspace
= SYMTAB_PSPACE (s
);
244 if (current_source_symtab
)
247 /* Make the default place to list be the function `main'
249 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0))
251 sals
= decode_line_spec (main_name (), 1);
254 current_source_pspace
= sal
.pspace
;
255 current_source_symtab
= sal
.symtab
;
256 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
257 if (current_source_symtab
)
261 /* Alright; find the last file in the symtab list (ignoring .h's
262 and namespace symtabs). */
264 current_source_line
= 1;
268 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
270 const char *name
= s
->filename
;
271 int len
= strlen (name
);
272 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
273 || strcmp (name
, "<<C++-namespaces>>") == 0)))
275 current_source_pspace
= current_program_space
;
276 current_source_symtab
= s
;
281 if (current_source_symtab
)
284 /* How about the partial symbol tables? */
288 for (ps
= ofp
->psymtabs
; ps
!= NULL
; ps
= ps
->next
)
290 const char *name
= ps
->filename
;
291 int len
= strlen (name
);
292 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
293 || strcmp (name
, "<<C++-namespaces>>") == 0)))
301 internal_error (__FILE__
, __LINE__
,
302 _("select_source_symtab: "
303 "readin pst found and no symtabs."));
307 current_source_pspace
= current_program_space
;
308 current_source_symtab
= PSYMTAB_TO_SYMTAB (cs_pst
);
311 if (current_source_symtab
)
314 error (_("Can't find a default source file"));
318 show_directories (char *ignore
, int from_tty
)
320 puts_filtered ("Source directories searched: ");
321 puts_filtered (source_path
);
322 puts_filtered ("\n");
325 /* Forget what we learned about line positions in source files, and
326 which directories contain them; must check again now since files
327 may be found in a different directory now. */
330 forget_cached_source_info (void)
332 struct program_space
*pspace
;
334 struct objfile
*objfile
;
335 struct partial_symtab
*pst
;
338 ALL_PSPACE_OBJFILES (pspace
, objfile
)
340 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
342 if (s
->line_charpos
!= NULL
)
344 xfree (s
->line_charpos
);
345 s
->line_charpos
= NULL
;
347 if (s
->fullname
!= NULL
)
354 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
356 if (pst
->fullname
!= NULL
)
358 xfree (pst
->fullname
);
359 pst
->fullname
= NULL
;
364 last_source_visited
= NULL
;
368 init_source_path (void)
372 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
373 source_path
= xstrdup (buf
);
374 forget_cached_source_info ();
377 /* Add zero or more directories to the front of the source path. */
380 directory_command (char *dirname
, int from_tty
)
383 /* FIXME, this goes to "delete dir"... */
386 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
394 mod_path (dirname
, &source_path
);
395 forget_cached_source_info ();
398 show_directories ((char *) 0, from_tty
);
401 /* Add a path given with the -d command line switch.
402 This will not be quoted so we must not treat spaces as separators. */
405 directory_switch (char *dirname
, int from_tty
)
407 add_path (dirname
, &source_path
, 0);
410 /* Add zero or more directories to the front of an arbitrary path. */
413 mod_path (char *dirname
, char **which_path
)
415 add_path (dirname
, which_path
, 1);
418 /* Workhorse of mod_path. Takes an extra argument to determine
419 if dirname should be parsed for separators that indicate multiple
420 directories. This allows for interfaces that pre-parse the dirname
421 and allow specification of traditional separator characters such
425 add_path (char *dirname
, char **which_path
, int parse_separators
)
427 char *old
= *which_path
;
436 if (parse_separators
)
438 /* This will properly parse the space and tab separators
439 and any quotes that may exist. DIRNAME_SEPARATOR will
440 be dealt with later. */
441 argv
= gdb_buildargv (dirname
);
442 make_cleanup_freeargv (argv
);
448 arg
= xstrdup (dirname
);
449 make_cleanup (xfree
, arg
);
459 char *separator
= NULL
;
461 /* Spaces and tabs will have been removed by buildargv().
462 The directories will there be split into a list but
463 each entry may still contain DIRNAME_SEPARATOR. */
464 if (parse_separators
)
465 separator
= strchr (name
, DIRNAME_SEPARATOR
);
468 p
= arg
= name
+ strlen (name
);
473 while (*arg
== DIRNAME_SEPARATOR
)
477 /* If there are no more directories in this argument then start
478 on the next argument next time round the loop (if any). */
480 arg
= parse_separators
? argv
[++argv_index
] : NULL
;
483 /* name is the start of the directory.
484 p is the separator (or null) following the end. */
486 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
487 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
488 /* On MS-DOS and MS-Windows, h:\ is different from h: */
489 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
491 && IS_DIR_SEPARATOR (p
[-1]))
492 /* Sigh. "foo/" => "foo" */
496 while (p
> name
&& p
[-1] == '.')
500 /* "." => getwd (). */
501 name
= current_directory
;
504 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
514 /* "...foo/." => "...foo". */
525 name
= tilde_expand (name
);
526 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
527 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
528 name
= concat (name
, ".", (char *)NULL
);
530 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
531 name
= concat (current_directory
, SLASH_STRING
, name
, (char *)NULL
);
533 name
= savestring (name
, p
- name
);
534 make_cleanup (xfree
, name
);
536 /* Unless it's a variable, check existence. */
539 /* These are warnings, not errors, since we don't want a
540 non-existent directory in a .gdbinit file to stop processing
541 of the .gdbinit file.
543 Whether they get added to the path is more debatable. Current
544 answer is yes, in case the user wants to go make the directory
545 or whatever. If the directory continues to not exist/not be
546 a directory/etc, then having them in the path should be
548 if (stat (name
, &st
) < 0)
550 int save_errno
= errno
;
551 fprintf_unfiltered (gdb_stderr
, "Warning: ");
552 print_sys_errmsg (name
, save_errno
);
554 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
555 warning (_("%s is not a directory."), name
);
560 unsigned int len
= strlen (name
);
565 /* FIXME: strncmp loses in interesting ways on MS-DOS and
566 MS-Windows because of case-insensitivity and two different
567 but functionally identical slash characters. We need a
568 special filesystem-dependent file-name comparison function.
570 Actually, even on Unix I would use realpath() or its work-
571 alike before comparing. Then all the code above which
572 removes excess slashes and dots could simply go away. */
573 if (!strncmp (p
, name
, len
)
574 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
576 /* Found it in the search path, remove old copy */
578 p
--; /* Back over leading separator */
579 if (prefix
> p
- *which_path
)
580 goto skip_dup
; /* Same dir twice in one cmd */
581 strcpy (p
, &p
[len
+ 1]); /* Copy from next \0 or : */
583 p
= strchr (p
, DIRNAME_SEPARATOR
);
593 tinybuf
[0] = DIRNAME_SEPARATOR
;
596 /* If we have already tacked on a name(s) in this command, be sure they stay
597 on the front as we tack on some more. */
604 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
606 *which_path
= concat (temp
, "", &old
[prefix
], (char *)NULL
);
607 prefix
= strlen (temp
);
612 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
614 prefix
= strlen (name
);
627 source_info (char *ignore
, int from_tty
)
629 struct symtab
*s
= current_source_symtab
;
633 printf_filtered (_("No current source file.\n"));
636 printf_filtered (_("Current source file is %s\n"), s
->filename
);
638 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
640 printf_filtered (_("Located in %s\n"), s
->fullname
);
642 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
643 s
->nlines
== 1 ? "" : "s");
645 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
646 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
647 printf_filtered (_("%s preprocessor macro info.\n"),
648 s
->macro_table
? "Includes" : "Does not include");
652 /* Return True if the file NAME exists and is a regular file */
654 is_regular_file (const char *name
)
657 const int status
= stat (name
, &st
);
659 /* Stat should never fail except when the file does not exist.
660 If stat fails, analyze the source of error and return True
661 unless the file does not exist, to avoid returning false results
662 on obscure systems where stat does not work as expected.
665 return (errno
!= ENOENT
);
667 return S_ISREG (st
.st_mode
);
670 /* Open a file named STRING, searching path PATH (dir names sep by some char)
671 using mode MODE in the calls to open. You cannot use this function to
672 create files (O_CREAT).
674 OPTS specifies the function behaviour in specific cases.
676 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
677 (ie pretend the first element of PATH is "."). This also indicates
678 that a slash in STRING disables searching of the path (this is
679 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
680 get that particular version of foo or an error message).
682 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
683 searched in path (we usually want this for source files but not for
686 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
687 the actual file opened (this string will always start with a "/"). We
688 have to take special pains to avoid doubling the "/" between the directory
689 and the file, sigh! Emacs gets confuzzed by this when we print the
692 If a file is found, return the descriptor.
693 Otherwise, return -1, with errno set for the last name we tried to open. */
695 /* >>>> This should only allow files of certain types,
696 >>>> eg executable, non-directory */
698 openp (const char *path
, int opts
, const char *string
,
699 int mode
, char **filename_opened
)
708 /* The open syscall MODE parameter is not specified. */
709 gdb_assert ((mode
& O_CREAT
) == 0);
710 gdb_assert (string
!= NULL
);
712 /* A file with an empty name cannot possibly exist. Report a failure
713 without further checking.
715 This is an optimization which also defends us against buggy
716 implementations of the "stat" function. For instance, we have
717 noticed that a MinGW debugger built on Windows XP 32bits crashes
718 when the debugger is started with an empty argument. */
719 if (string
[0] == '\0')
730 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
734 if (is_regular_file (string
))
736 filename
= alloca (strlen (string
) + 1);
737 strcpy (filename
, string
);
738 fd
= open (filename
, mode
);
748 if (!(opts
& OPF_SEARCH_IN_PATH
))
749 for (i
= 0; string
[i
]; i
++)
750 if (IS_DIR_SEPARATOR (string
[i
]))
754 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
755 while (IS_DIR_SEPARATOR(string
[0]))
759 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
762 alloclen
= strlen (path
) + strlen (string
) + 2;
763 filename
= alloca (alloclen
);
765 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
767 p1
= strchr (p
, DIRNAME_SEPARATOR
);
773 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
774 && p
[2] == 'w' && p
[3] == 'd')
776 /* Name is $cwd -- insert current directory name instead. */
779 /* First, realloc the filename buffer if too short. */
780 len
= strlen (current_directory
);
781 newlen
= len
+ strlen (string
) + 2;
782 if (newlen
> alloclen
)
785 filename
= alloca (alloclen
);
787 strcpy (filename
, current_directory
);
791 /* Normal file name in path -- just use it. */
792 strncpy (filename
, p
, len
);
796 /* Remove trailing slashes */
797 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
800 strcat (filename
+ len
, SLASH_STRING
);
801 strcat (filename
, string
);
803 if (is_regular_file (filename
))
805 fd
= open (filename
, mode
);
814 /* If a file was opened, canonicalize its filename. Use xfullpath
815 rather than gdb_realpath to avoid resolving the basename part
816 of filenames when the associated file is a symbolic link. This
817 fixes a potential inconsistency between the filenames known to
818 GDB and the filenames it prints in the annotations. */
820 *filename_opened
= NULL
;
821 else if (IS_ABSOLUTE_PATH (filename
))
822 *filename_opened
= xfullpath (filename
);
825 /* Beware the // my son, the Emacs barfs, the botch that catch... */
827 char *f
= concat (current_directory
,
828 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
830 filename
, (char *)NULL
);
831 *filename_opened
= xfullpath (f
);
840 /* This is essentially a convenience, for clients that want the behaviour
841 of openp, using source_path, but that really don't want the file to be
842 opened but want instead just to know what the full pathname is (as
843 qualified against source_path).
845 The current working directory is searched first.
847 If the file was found, this function returns 1, and FULL_PATHNAME is
848 set to the fully-qualified pathname.
850 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
852 source_full_path_of (const char *filename
, char **full_pathname
)
856 fd
= openp (source_path
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
857 O_RDONLY
, full_pathname
);
860 *full_pathname
= NULL
;
868 /* Return non-zero if RULE matches PATH, that is if the rule can be
872 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
875 const int from_len
= strlen (rule
->from
);
876 const int path_len
= strlen (path
);
879 if (path_len
< from_len
)
882 /* The substitution rules are anchored at the start of the path,
883 so the path should start with rule->from. There is no filename
884 comparison routine, so we need to extract the first FROM_LEN
885 characters from PATH first and use that to do the comparison. */
887 path_start
= alloca (from_len
+ 1);
888 strncpy (path_start
, path
, from_len
);
889 path_start
[from_len
] = '\0';
891 if (FILENAME_CMP (path_start
, rule
->from
) != 0)
894 /* Make sure that the region in the path that matches the substitution
895 rule is immediately followed by a directory separator (or the end of
896 string character). */
898 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
904 /* Find the substitute-path rule that applies to PATH and return it.
905 Return NULL if no rule applies. */
907 static struct substitute_path_rule
*
908 get_substitute_path_rule (const char *path
)
910 struct substitute_path_rule
*rule
= substitute_path_rules
;
912 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
918 /* If the user specified a source path substitution rule that applies
919 to PATH, then apply it and return the new path. This new path must
920 be deallocated afterwards.
922 Return NULL if no substitution rule was specified by the user,
923 or if no rule applied to the given PATH. */
926 rewrite_source_path (const char *path
)
928 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
935 from_len
= strlen (rule
->from
);
937 /* Compute the rewritten path and return it. */
940 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
941 strcpy (new_path
, rule
->to
);
942 strcat (new_path
, path
+ from_len
);
947 /* This function is capable of finding the absolute path to a
948 source file, and opening it, provided you give it a FILENAME. Both the
949 DIRNAME and FULLNAME are only added suggestions on where to find the file.
951 FILENAME should be the filename to open.
952 DIRNAME is the compilation directory of a particular source file.
953 Only some debug formats provide this info.
954 FULLNAME can be the last known absolute path to the file in question.
955 Space for the path must have been malloc'd. If a path substitution
956 is applied we free the old value and set a new one.
959 A valid file descriptor is returned. ( the return value is positive )
960 FULLNAME is set to the absolute path to the file just opened.
961 The caller is responsible for freeing FULLNAME.
964 An invalid file descriptor is returned. ( the return value is negative )
965 FULLNAME is set to NULL. */
968 find_and_open_source (const char *filename
,
972 char *path
= source_path
;
976 /* Quick way out if we already know its full name */
980 /* The user may have requested that source paths be rewritten
981 according to substitution rules he provided. If a substitution
982 rule applies to this path, then apply it. */
983 char *rewritten_fullname
= rewrite_source_path (*fullname
);
985 if (rewritten_fullname
!= NULL
)
988 *fullname
= rewritten_fullname
;
991 result
= open (*fullname
, OPEN_MODE
);
994 /* Didn't work -- free old one, try again. */
1001 /* If necessary, rewrite the compilation directory name according
1002 to the source path substitution rules specified by the user. */
1004 char *rewritten_dirname
= rewrite_source_path (dirname
);
1006 if (rewritten_dirname
!= NULL
)
1008 make_cleanup (xfree
, rewritten_dirname
);
1009 dirname
= rewritten_dirname
;
1012 /* Replace a path entry of $cdir with the compilation directory name */
1014 /* We cast strstr's result in case an ANSIhole has made it const,
1015 which produces a "required warning" when assigned to a nonconst. */
1016 p
= (char *) strstr (source_path
, "$cdir");
1017 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1018 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1023 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1024 len
= p
- source_path
;
1025 strncpy (path
, source_path
, len
); /* Before $cdir */
1026 strcpy (path
+ len
, dirname
); /* new stuff */
1027 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
1031 if (IS_ABSOLUTE_PATH (filename
))
1033 /* If filename is absolute path, try the source path
1034 substitution on it. */
1035 char *rewritten_filename
= rewrite_source_path (filename
);
1037 if (rewritten_filename
!= NULL
)
1039 make_cleanup (xfree
, rewritten_filename
);
1040 filename
= rewritten_filename
;
1044 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, fullname
);
1047 /* Didn't work. Try using just the basename. */
1048 p
= lbasename (filename
);
1050 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, fullname
);
1056 /* Open a source file given a symtab S. Returns a file descriptor or
1057 negative number for error.
1059 This function is a convience function to find_and_open_source. */
1062 open_source_file (struct symtab
*s
)
1067 return find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1070 /* Finds the fullname that a symtab represents.
1072 If this functions finds the fullname, it will save it in s->fullname
1073 and it will also return the value.
1075 If this function fails to find the file that this symtab represents,
1076 NULL will be returned and s->fullname will be set to NULL. */
1078 symtab_to_fullname (struct symtab
*s
)
1085 /* Don't check s->fullname here, the file could have been
1086 deleted/moved/..., look for it again */
1087 r
= find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1098 /* Finds the fullname that a partial_symtab represents.
1100 If this functions finds the fullname, it will save it in ps->fullname
1101 and it will also return the value.
1103 If this function fails to find the file that this partial_symtab represents,
1104 NULL will be returned and ps->fullname will be set to NULL. */
1106 psymtab_to_fullname (struct partial_symtab
*ps
)
1113 /* Don't check ps->fullname here, the file could have been
1114 deleted/moved/..., look for it again */
1115 r
= find_and_open_source (ps
->filename
, ps
->dirname
, &ps
->fullname
);
1120 return ps
->fullname
;
1126 /* Create and initialize the table S->line_charpos that records
1127 the positions of the lines in the source file, which is assumed
1128 to be open on descriptor DESC.
1129 All set S->nlines to the number of such lines. */
1132 find_source_lines (struct symtab
*s
, int desc
)
1135 char *data
, *p
, *end
;
1137 int lines_allocated
= 1000;
1143 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
1144 if (fstat (desc
, &st
) < 0)
1145 perror_with_name (s
->filename
);
1147 if (s
->objfile
&& s
->objfile
->obfd
)
1148 mtime
= s
->objfile
->mtime
;
1150 mtime
= exec_bfd_mtime
;
1152 if (mtime
&& mtime
< st
.st_mtime
)
1153 warning (_("Source file is more recent than executable."));
1155 #ifdef LSEEK_NOT_LINEAR
1159 /* Have to read it byte by byte to find out where the chars live */
1161 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
1163 while (myread (desc
, &c
, 1) > 0)
1167 if (nlines
== lines_allocated
)
1169 lines_allocated
*= 2;
1171 (int *) xrealloc ((char *) line_charpos
,
1172 sizeof (int) * lines_allocated
);
1174 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
1178 #else /* lseek linear. */
1180 struct cleanup
*old_cleanups
;
1182 /* st_size might be a large type, but we only support source files whose
1183 size fits in an int. */
1184 size
= (int) st
.st_size
;
1186 /* Use malloc, not alloca, because this may be pretty large, and we may
1187 run into various kinds of limits on stack size. */
1188 data
= (char *) xmalloc (size
);
1189 old_cleanups
= make_cleanup (xfree
, data
);
1191 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1192 size
= myread (desc
, data
, size
);
1194 perror_with_name (s
->filename
);
1197 line_charpos
[0] = 0;
1202 /* A newline at the end does not start a new line. */
1205 if (nlines
== lines_allocated
)
1207 lines_allocated
*= 2;
1209 (int *) xrealloc ((char *) line_charpos
,
1210 sizeof (int) * lines_allocated
);
1212 line_charpos
[nlines
++] = p
- data
;
1215 do_cleanups (old_cleanups
);
1217 #endif /* lseek linear. */
1220 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1224 /* Return the character position of a line LINE in symtab S.
1225 Return 0 if anything is invalid. */
1227 #if 0 /* Currently unused */
1230 source_line_charpos (struct symtab
*s
, int line
)
1234 if (!s
->line_charpos
|| line
<= 0)
1236 if (line
> s
->nlines
)
1238 return s
->line_charpos
[line
- 1];
1241 /* Return the line number of character position POS in symtab S. */
1244 source_charpos_line (struct symtab
*s
, int chr
)
1249 if (s
== 0 || s
->line_charpos
== 0)
1251 lnp
= s
->line_charpos
;
1252 /* Files are usually short, so sequential search is Ok */
1253 while (line
< s
->nlines
&& *lnp
<= chr
)
1258 if (line
>= s
->nlines
)
1266 /* Get full pathname and line number positions for a symtab.
1267 Return nonzero if line numbers may have changed.
1268 Set *FULLNAME to actual name of the file as found by `openp',
1269 or to 0 if the file is not found. */
1272 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1274 int desc
, linenums_changed
= 0;
1275 struct cleanup
*cleanups
;
1277 desc
= open_source_file (s
);
1284 cleanups
= make_cleanup_close (desc
);
1286 *fullname
= s
->fullname
;
1287 if (s
->line_charpos
== 0)
1288 linenums_changed
= 1;
1289 if (linenums_changed
)
1290 find_source_lines (s
, desc
);
1291 do_cleanups (cleanups
);
1292 return linenums_changed
;
1295 /* Print text describing the full name of the source file S
1296 and the line number LINE and its corresponding character position.
1297 The text starts with two Ctrl-z so that the Emacs-GDB interface
1300 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1302 Return 1 if successful, 0 if could not find the file. */
1305 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1308 if (s
->line_charpos
== 0)
1309 get_filename_and_charpos (s
, (char **) NULL
);
1310 if (s
->fullname
== 0)
1312 if (line
> s
->nlines
)
1313 /* Don't index off the end of the line_charpos array. */
1315 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1316 mid_statement
, get_objfile_arch (s
->objfile
), pc
);
1318 current_source_line
= line
;
1319 first_line_listed
= line
;
1320 last_line_listed
= line
;
1321 current_source_symtab
= s
;
1326 /* Print source lines from the file of symtab S,
1327 starting with line number LINE and stopping before line number STOPLINE. */
1329 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1332 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1337 int nlines
= stopline
- line
;
1338 struct cleanup
*cleanup
;
1340 /* Regardless of whether we can open the file, set current_source_symtab. */
1341 current_source_symtab
= s
;
1342 current_source_line
= line
;
1343 first_line_listed
= line
;
1345 /* If printing of source lines is disabled, just print file and line number */
1346 if (ui_out_test_flags (uiout
, ui_source_list
))
1348 /* Only prints "No such file or directory" once */
1349 if ((s
!= last_source_visited
) || (!last_source_error
))
1351 last_source_visited
= s
;
1352 desc
= open_source_file (s
);
1356 desc
= last_source_error
;
1368 last_source_error
= desc
;
1372 char *name
= alloca (strlen (s
->filename
) + 100);
1373 sprintf (name
, "%d\t%s", line
, s
->filename
);
1374 print_sys_errmsg (name
, errno
);
1377 ui_out_field_int (uiout
, "line", line
);
1378 ui_out_text (uiout
, "\tin ");
1379 ui_out_field_string (uiout
, "file", s
->filename
);
1380 ui_out_text (uiout
, "\n");
1385 last_source_error
= 0;
1387 if (s
->line_charpos
== 0)
1388 find_source_lines (s
, desc
);
1390 if (line
< 1 || line
> s
->nlines
)
1393 error (_("Line number %d out of range; %s has %d lines."),
1394 line
, s
->filename
, s
->nlines
);
1397 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1400 perror_with_name (s
->filename
);
1403 stream
= fdopen (desc
, FDOPEN_MODE
);
1405 cleanup
= make_cleanup_fclose (stream
);
1407 while (nlines
-- > 0)
1414 last_line_listed
= current_source_line
;
1415 sprintf (buf
, "%d\t", current_source_line
++);
1416 ui_out_text (uiout
, buf
);
1419 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1421 sprintf (buf
, "^%c", c
+ 0100);
1422 ui_out_text (uiout
, buf
);
1425 ui_out_text (uiout
, "^?");
1428 /* Skip a \r character, but only before a \n. */
1429 int c1
= fgetc (stream
);
1432 printf_filtered ("^%c", c
+ 0100);
1434 ungetc (c1
, stream
);
1438 sprintf (buf
, "%c", c
);
1439 ui_out_text (uiout
, buf
);
1442 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1445 do_cleanups (cleanup
);
1448 /* Show source lines from the file of symtab S, starting with line
1449 number LINE and stopping before line number STOPLINE. If this is
1450 not the command line version, then the source is shown in the source
1451 window otherwise it is simply printed */
1454 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1456 print_source_lines_base (s
, line
, stopline
, noerror
);
1459 /* Print info on range of pc's in a specified line. */
1462 line_info (char *arg
, int from_tty
)
1464 struct symtabs_and_lines sals
;
1465 struct symtab_and_line sal
;
1466 CORE_ADDR start_pc
, end_pc
;
1469 init_sal (&sal
); /* initialize to zeroes */
1473 sal
.symtab
= current_source_symtab
;
1474 sal
.line
= last_line_listed
;
1476 sals
.sals
= (struct symtab_and_line
*)
1477 xmalloc (sizeof (struct symtab_and_line
));
1482 sals
= decode_line_spec_1 (arg
, 0);
1487 /* C++ More than one line may have been specified, as when the user
1488 specifies an overloaded function name. Print info on them all. */
1489 for (i
= 0; i
< sals
.nelts
; i
++)
1493 if (sal
.symtab
== 0)
1495 struct gdbarch
*gdbarch
= get_current_arch ();
1497 printf_filtered (_("No line number information available"));
1500 /* This is useful for "info line *0x7f34". If we can't tell the
1501 user about a source line, at least let them have the symbolic
1503 printf_filtered (" for address ");
1505 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1508 printf_filtered (".");
1509 printf_filtered ("\n");
1511 else if (sal
.line
> 0
1512 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1514 struct gdbarch
*gdbarch
= get_objfile_arch (sal
.symtab
->objfile
);
1516 if (start_pc
== end_pc
)
1518 printf_filtered ("Line %d of \"%s\"",
1519 sal
.line
, sal
.symtab
->filename
);
1521 printf_filtered (" is at address ");
1522 print_address (gdbarch
, start_pc
, gdb_stdout
);
1524 printf_filtered (" but contains no code.\n");
1528 printf_filtered ("Line %d of \"%s\"",
1529 sal
.line
, sal
.symtab
->filename
);
1531 printf_filtered (" starts at address ");
1532 print_address (gdbarch
, start_pc
, gdb_stdout
);
1534 printf_filtered (" and ends at ");
1535 print_address (gdbarch
, end_pc
, gdb_stdout
);
1536 printf_filtered (".\n");
1539 /* x/i should display this line's code. */
1540 set_next_address (gdbarch
, start_pc
);
1542 /* Repeating "info line" should do the following line. */
1543 last_line_listed
= sal
.line
+ 1;
1545 /* If this is the only line, show the source code. If it could
1546 not find the file, don't do anything special. */
1547 if (annotation_level
&& sals
.nelts
== 1)
1548 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1551 /* Is there any case in which we get here, and have an address
1552 which the user would want to see? If we have debugging symbols
1553 and no line numbers? */
1554 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1555 sal
.line
, sal
.symtab
->filename
);
1560 /* Commands to search the source file for a regexp. */
1563 forward_search_command (char *regex
, int from_tty
)
1570 struct cleanup
*cleanups
;
1572 line
= last_line_listed
+ 1;
1574 msg
= (char *) re_comp (regex
);
1576 error (("%s"), msg
);
1578 if (current_source_symtab
== 0)
1579 select_source_symtab (0);
1581 desc
= open_source_file (current_source_symtab
);
1583 perror_with_name (current_source_symtab
->filename
);
1584 cleanups
= make_cleanup_close (desc
);
1586 if (current_source_symtab
->line_charpos
== 0)
1587 find_source_lines (current_source_symtab
, desc
);
1589 if (line
< 1 || line
> current_source_symtab
->nlines
)
1590 error (_("Expression not found"));
1592 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1593 perror_with_name (current_source_symtab
->filename
);
1595 discard_cleanups (cleanups
);
1596 stream
= fdopen (desc
, FDOPEN_MODE
);
1598 cleanups
= make_cleanup_fclose (stream
);
1601 static char *buf
= NULL
;
1603 int cursize
, newsize
;
1606 buf
= xmalloc (cursize
);
1615 if (p
- buf
== cursize
)
1617 newsize
= cursize
+ cursize
/ 2;
1618 buf
= xrealloc (buf
, newsize
);
1623 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1625 /* Remove the \r, if any, at the end of the line, otherwise
1626 regular expressions that end with $ or \n won't work. */
1627 if (p
- buf
> 1 && p
[-2] == '\r')
1633 /* we now have a source line in buf, null terminate and match */
1635 if (re_exec (buf
) > 0)
1638 do_cleanups (cleanups
);
1639 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1640 set_internalvar_integer (lookup_internalvar ("_"), line
);
1641 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1647 printf_filtered (_("Expression not found\n"));
1648 do_cleanups (cleanups
);
1652 reverse_search_command (char *regex
, int from_tty
)
1659 struct cleanup
*cleanups
;
1661 line
= last_line_listed
- 1;
1663 msg
= (char *) re_comp (regex
);
1665 error (("%s"), msg
);
1667 if (current_source_symtab
== 0)
1668 select_source_symtab (0);
1670 desc
= open_source_file (current_source_symtab
);
1672 perror_with_name (current_source_symtab
->filename
);
1673 cleanups
= make_cleanup_close (desc
);
1675 if (current_source_symtab
->line_charpos
== 0)
1676 find_source_lines (current_source_symtab
, desc
);
1678 if (line
< 1 || line
> current_source_symtab
->nlines
)
1679 error (_("Expression not found"));
1681 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1682 perror_with_name (current_source_symtab
->filename
);
1684 discard_cleanups (cleanups
);
1685 stream
= fdopen (desc
, FDOPEN_MODE
);
1687 cleanups
= make_cleanup_fclose (stream
);
1690 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1691 char buf
[4096]; /* Should be reasonable??? */
1701 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1703 /* Remove the \r, if any, at the end of the line, otherwise
1704 regular expressions that end with $ or \n won't work. */
1705 if (p
- buf
> 1 && p
[-2] == '\r')
1711 /* We now have a source line in buf; null terminate and match. */
1713 if (re_exec (buf
) > 0)
1716 do_cleanups (cleanups
);
1717 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1718 set_internalvar_integer (lookup_internalvar ("_"), line
);
1719 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1723 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1725 do_cleanups (cleanups
);
1726 perror_with_name (current_source_symtab
->filename
);
1730 printf_filtered (_("Expression not found\n"));
1731 do_cleanups (cleanups
);
1735 /* If the last character of PATH is a directory separator, then strip it. */
1738 strip_trailing_directory_separator (char *path
)
1740 const int last
= strlen (path
) - 1;
1743 return; /* No stripping is needed if PATH is the empty string. */
1745 if (IS_DIR_SEPARATOR (path
[last
]))
1749 /* Return the path substitution rule that matches FROM.
1750 Return NULL if no rule matches. */
1752 static struct substitute_path_rule
*
1753 find_substitute_path_rule (const char *from
)
1755 struct substitute_path_rule
*rule
= substitute_path_rules
;
1757 while (rule
!= NULL
)
1759 if (FILENAME_CMP (rule
->from
, from
) == 0)
1767 /* Add a new substitute-path rule at the end of the current list of rules.
1768 The new rule will replace FROM into TO. */
1771 add_substitute_path_rule (char *from
, char *to
)
1773 struct substitute_path_rule
*rule
;
1774 struct substitute_path_rule
*new_rule
;
1776 new_rule
= xmalloc (sizeof (struct substitute_path_rule
));
1777 new_rule
->from
= xstrdup (from
);
1778 new_rule
->to
= xstrdup (to
);
1779 new_rule
->next
= NULL
;
1781 /* If the list of rules are empty, then insert the new rule
1782 at the head of the list. */
1784 if (substitute_path_rules
== NULL
)
1786 substitute_path_rules
= new_rule
;
1790 /* Otherwise, skip to the last rule in our list and then append
1793 rule
= substitute_path_rules
;
1794 while (rule
->next
!= NULL
)
1797 rule
->next
= new_rule
;
1800 /* Remove the given source path substitution rule from the current list
1801 of rules. The memory allocated for that rule is also deallocated. */
1804 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1806 if (rule
== substitute_path_rules
)
1807 substitute_path_rules
= rule
->next
;
1810 struct substitute_path_rule
*prev
= substitute_path_rules
;
1812 while (prev
!= NULL
&& prev
->next
!= rule
)
1815 gdb_assert (prev
!= NULL
);
1817 prev
->next
= rule
->next
;
1825 /* Implement the "show substitute-path" command. */
1828 show_substitute_path_command (char *args
, int from_tty
)
1830 struct substitute_path_rule
*rule
= substitute_path_rules
;
1834 argv
= gdb_buildargv (args
);
1835 make_cleanup_freeargv (argv
);
1837 /* We expect zero or one argument. */
1839 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1840 error (_("Too many arguments in command"));
1842 if (argv
!= NULL
&& argv
[0] != NULL
)
1845 /* Print the substitution rules. */
1849 (_("Source path substitution rule matching `%s':\n"), from
);
1851 printf_filtered (_("List of all source path substitution rules:\n"));
1853 while (rule
!= NULL
)
1855 if (from
== NULL
|| FILENAME_CMP (rule
->from
, from
) == 0)
1856 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1861 /* Implement the "unset substitute-path" command. */
1864 unset_substitute_path_command (char *args
, int from_tty
)
1866 struct substitute_path_rule
*rule
= substitute_path_rules
;
1867 char **argv
= gdb_buildargv (args
);
1871 /* This function takes either 0 or 1 argument. */
1873 make_cleanup_freeargv (argv
);
1874 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1875 error (_("Incorrect usage, too many arguments in command"));
1877 if (argv
!= NULL
&& argv
[0] != NULL
)
1880 /* If the user asked for all the rules to be deleted, ask him
1881 to confirm and give him a chance to abort before the action
1885 && !query (_("Delete all source path substitution rules? ")))
1886 error (_("Canceled"));
1888 /* Delete the rule matching the argument. No argument means that
1889 all rules should be deleted. */
1891 while (rule
!= NULL
)
1893 struct substitute_path_rule
*next
= rule
->next
;
1895 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1897 delete_substitute_path_rule (rule
);
1904 /* If the user asked for a specific rule to be deleted but
1905 we could not find it, then report an error. */
1907 if (from
!= NULL
&& !rule_found
)
1908 error (_("No substitution rule defined for `%s'"), from
);
1910 forget_cached_source_info ();
1913 /* Add a new source path substitution rule. */
1916 set_substitute_path_command (char *args
, int from_tty
)
1918 char *from_path
, *to_path
;
1920 struct substitute_path_rule
*rule
;
1922 argv
= gdb_buildargv (args
);
1923 make_cleanup_freeargv (argv
);
1925 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1926 error (_("Incorrect usage, too few arguments in command"));
1928 if (argv
[2] != NULL
)
1929 error (_("Incorrect usage, too many arguments in command"));
1931 if (*(argv
[0]) == '\0')
1932 error (_("First argument must be at least one character long"));
1934 /* Strip any trailing directory separator character in either FROM
1935 or TO. The substitution rule already implicitly contains them. */
1936 strip_trailing_directory_separator (argv
[0]);
1937 strip_trailing_directory_separator (argv
[1]);
1939 /* If a rule with the same "from" was previously defined, then
1940 delete it. This new rule replaces it. */
1942 rule
= find_substitute_path_rule (argv
[0]);
1944 delete_substitute_path_rule (rule
);
1946 /* Insert the new substitution rule. */
1948 add_substitute_path_rule (argv
[0], argv
[1]);
1949 forget_cached_source_info ();
1954 _initialize_source (void)
1956 struct cmd_list_element
*c
;
1957 current_source_symtab
= 0;
1958 init_source_path ();
1960 /* The intention is to use POSIX Basic Regular Expressions.
1961 Always use the GNU regex routine for consistency across all hosts.
1962 Our current GNU regex.c does not have all the POSIX features, so this is
1963 just an approximation. */
1964 re_set_syntax (RE_SYNTAX_GREP
);
1966 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1967 Add directory DIR to beginning of search path for source files.\n\
1968 Forget cached info on source file locations and line positions.\n\
1969 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1970 directory in which the source file was compiled into object code.\n\
1971 With no argument, reset the search path to $cdir:$cwd, the default."),
1975 add_com_alias ("use", "directory", class_files
, 0);
1977 set_cmd_completer (c
, filename_completer
);
1979 add_cmd ("directories", no_class
, show_directories
, _("\
1980 Current search path for finding source files.\n\
1981 $cwd in the path means the current working directory.\n\
1982 $cdir in the path means the compilation directory of the source file."),
1987 add_com_alias ("D", "directory", class_files
, 0);
1988 add_cmd ("ld", no_class
, show_directories
, _("\
1989 Current search path for finding source files.\n\
1990 $cwd in the path means the current working directory.\n\
1991 $cdir in the path means the compilation directory of the source file."),
1995 add_info ("source", source_info
,
1996 _("Information about the current source file."));
1998 add_info ("line", line_info
, _("\
1999 Core addresses of the code for a source line.\n\
2000 Line can be specified as\n\
2001 LINENUM, to list around that line in current file,\n\
2002 FILE:LINENUM, to list around that line in that file,\n\
2003 FUNCTION, to list around beginning of that function,\n\
2004 FILE:FUNCTION, to distinguish among like-named static functions.\n\
2005 Default is to describe the last source line that was listed.\n\n\
2006 This sets the default address for \"x\" to the line's first instruction\n\
2007 so that \"x/i\" suffices to start examining the machine code.\n\
2008 The address is also stored as the value of \"$_\"."));
2010 add_com ("forward-search", class_files
, forward_search_command
, _("\
2011 Search for regular expression (see regex(3)) from last line listed.\n\
2012 The matching line number is also stored as the value of \"$_\"."));
2013 add_com_alias ("search", "forward-search", class_files
, 0);
2015 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
2016 Search backward for regular expression (see regex(3)) from last line listed.\n\
2017 The matching line number is also stored as the value of \"$_\"."));
2021 add_com_alias ("/", "forward-search", class_files
, 0);
2022 add_com_alias ("?", "reverse-search", class_files
, 0);
2025 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
2026 Set number of source lines gdb will list by default."), _("\
2027 Show number of source lines gdb will list by default."), NULL
,
2030 &setlist
, &showlist
);
2032 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
2034 Usage: set substitute-path FROM TO\n\
2035 Add a substitution rule replacing FROM into TO in source file names.\n\
2036 If a substitution rule was previously set for FROM, the old rule\n\
2037 is replaced by the new one."),
2040 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
2042 Usage: unset substitute-path [FROM]\n\
2043 Delete the rule for substituting FROM in source file names. If FROM\n\
2044 is not specified, all substituting rules are deleted.\n\
2045 If the debugger cannot find a rule for FROM, it will display a warning."),
2048 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
2050 Usage: show substitute-path [FROM]\n\
2051 Print the rule for substituting FROM in source file names. If FROM\n\
2052 is not specified, print all substitution rules."),