1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1986-2013 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "arch-utils.h"
22 #include "expression.h"
29 #include "gdb_assert.h"
30 #include "filestuff.h"
32 #include <sys/types.h>
33 #include "gdb_string.h"
37 #include "gdb_regex.h"
43 #include "filenames.h" /* for DOSish file names */
44 #include "completer.h"
46 #include "readline/readline.h"
51 #define OPEN_MODE (O_RDONLY | O_BINARY)
52 #define FDOPEN_MODE FOPEN_RB
54 /* Prototypes for exported functions. */
56 void _initialize_source (void);
58 /* Prototypes for local functions. */
60 static int get_filename_and_charpos (struct symtab
*, char **);
62 static void reverse_search_command (char *, int);
64 static void forward_search_command (char *, int);
66 static void line_info (char *, int);
68 static void source_info (char *, int);
70 /* Path of directories to search for source files.
71 Same format as the PATH environment variable's value. */
75 /* Support for source path substitution commands. */
77 struct substitute_path_rule
81 struct substitute_path_rule
*next
;
84 static struct substitute_path_rule
*substitute_path_rules
= NULL
;
86 /* Symtab of default file for listing lines of. */
88 static struct symtab
*current_source_symtab
;
90 /* Default next line to list. */
92 static int current_source_line
;
94 static struct program_space
*current_source_pspace
;
96 /* Default number of lines to print with commands like "list".
97 This is based on guessing how many long (i.e. more than chars_per_line
98 characters) lines there will be. To be completely correct, "list"
99 and friends should be rewritten to count characters and see where
100 things are wrapping, but that would be a fair amount of work. */
102 int lines_to_list
= 10;
104 show_lines_to_list (struct ui_file
*file
, int from_tty
,
105 struct cmd_list_element
*c
, const char *value
)
107 fprintf_filtered (file
,
108 _("Number of source lines gdb "
109 "will list by default is %s.\n"),
113 /* Possible values of 'set filename-display'. */
114 static const char filename_display_basename
[] = "basename";
115 static const char filename_display_relative
[] = "relative";
116 static const char filename_display_absolute
[] = "absolute";
118 static const char *const filename_display_kind_names
[] = {
119 filename_display_basename
,
120 filename_display_relative
,
121 filename_display_absolute
,
125 static const char *filename_display_string
= filename_display_relative
;
128 show_filename_display_string (struct ui_file
*file
, int from_tty
,
129 struct cmd_list_element
*c
, const char *value
)
131 fprintf_filtered (file
, _("Filenames are displayed as \"%s\".\n"), value
);
134 /* Line number of last line printed. Default for various commands.
135 current_source_line is usually, but not always, the same as this. */
137 static int last_line_listed
;
139 /* First line number listed by last listing command. */
141 static int first_line_listed
;
143 /* Saves the name of the last source file visited and a possible error code.
144 Used to prevent repeating annoying "No such file or directories" msgs. */
146 static struct symtab
*last_source_visited
= NULL
;
147 static int last_source_error
= 0;
149 /* Return the first line listed by print_source_lines.
150 Used by command interpreters to request listing from
154 get_first_line_listed (void)
156 return first_line_listed
;
159 /* Return the default number of lines to print with commands like the
160 cli "list". The caller of print_source_lines must use this to
161 calculate the end line and use it in the call to print_source_lines
162 as it does not automatically use this value. */
165 get_lines_to_list (void)
167 return lines_to_list
;
170 /* Return the current source file for listing and next line to list.
171 NOTE: The returned sal pc and end fields are not valid. */
173 struct symtab_and_line
174 get_current_source_symtab_and_line (void)
176 struct symtab_and_line cursal
= { 0 };
178 cursal
.pspace
= current_source_pspace
;
179 cursal
.symtab
= current_source_symtab
;
180 cursal
.line
= current_source_line
;
187 /* If the current source file for listing is not set, try and get a default.
188 Usually called before get_current_source_symtab_and_line() is called.
189 It may err out if a default cannot be determined.
190 We must be cautious about where it is called, as it can recurse as the
191 process of determining a new default may call the caller!
192 Use get_current_source_symtab_and_line only to get whatever
193 we have without erroring out or trying to get a default. */
196 set_default_source_symtab_and_line (void)
198 if (!have_full_symbols () && !have_partial_symbols ())
199 error (_("No symbol table is loaded. Use the \"file\" command."));
201 /* Pull in a current source symtab if necessary. */
202 if (current_source_symtab
== 0)
203 select_source_symtab (0);
206 /* Return the current default file for listing and next line to list
207 (the returned sal pc and end fields are not valid.)
208 and set the current default to whatever is in SAL.
209 NOTE: The returned sal pc and end fields are not valid. */
211 struct symtab_and_line
212 set_current_source_symtab_and_line (const struct symtab_and_line
*sal
)
214 struct symtab_and_line cursal
= { 0 };
216 cursal
.pspace
= current_source_pspace
;
217 cursal
.symtab
= current_source_symtab
;
218 cursal
.line
= current_source_line
;
222 current_source_pspace
= sal
->pspace
;
223 current_source_symtab
= sal
->symtab
;
224 current_source_line
= sal
->line
;
229 /* Reset any information stored about a default file and line to print. */
232 clear_current_source_symtab_and_line (void)
234 current_source_symtab
= 0;
235 current_source_line
= 0;
238 /* Set the source file default for the "list" command to be S.
240 If S is NULL, and we don't have a default, find one. This
241 should only be called when the user actually tries to use the
242 default, since we produce an error if we can't find a reasonable
243 default. Also, since this can cause symbols to be read, doing it
244 before we need to would make things slower than necessary. */
247 select_source_symtab (struct symtab
*s
)
249 struct symtabs_and_lines sals
;
250 struct symtab_and_line sal
;
255 current_source_symtab
= s
;
256 current_source_line
= 1;
257 current_source_pspace
= SYMTAB_PSPACE (s
);
261 if (current_source_symtab
)
264 /* Make the default place to list be the function `main'
266 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0))
268 sals
= decode_line_with_current_source (main_name (),
269 DECODE_LINE_FUNFIRSTLINE
);
272 current_source_pspace
= sal
.pspace
;
273 current_source_symtab
= sal
.symtab
;
274 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
275 if (current_source_symtab
)
279 /* Alright; find the last file in the symtab list (ignoring .h's
280 and namespace symtabs). */
282 current_source_line
= 1;
286 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
288 const char *name
= s
->filename
;
289 int len
= strlen (name
);
291 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
292 || strcmp (name
, "<<C++-namespaces>>") == 0)))
294 current_source_pspace
= current_program_space
;
295 current_source_symtab
= s
;
300 if (current_source_symtab
)
306 s
= ofp
->sf
->qf
->find_last_source_symtab (ofp
);
308 current_source_symtab
= s
;
310 if (current_source_symtab
)
313 error (_("Can't find a default source file"));
316 /* Handler for "set directories path-list" command.
317 "set dir mumble" doesn't prepend paths, it resets the entire
318 path list. The theory is that set(show(dir)) should be a no-op. */
321 set_directories_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
323 /* This is the value that was set.
324 It needs to be processed to maintain $cdir:$cwd and remove dups. */
325 char *set_path
= source_path
;
327 /* We preserve the invariant that $cdir:$cwd begins life at the end of
328 the list by calling init_source_path. If they appear earlier in
329 SET_PATH then mod_path will move them appropriately.
330 mod_path will also remove duplicates. */
332 if (*set_path
!= '\0')
333 mod_path (set_path
, &source_path
);
338 /* Print the list of source directories.
339 This is used by the "ld" command, so it has the signature of a command
343 show_directories_1 (char *ignore
, int from_tty
)
345 puts_filtered ("Source directories searched: ");
346 puts_filtered (source_path
);
347 puts_filtered ("\n");
350 /* Handler for "show directories" command. */
353 show_directories_command (struct ui_file
*file
, int from_tty
,
354 struct cmd_list_element
*c
, const char *value
)
356 show_directories_1 (NULL
, from_tty
);
359 /* Forget line positions and file names for the symtabs in a
360 particular objfile. */
363 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
367 ALL_OBJFILE_SYMTABS (objfile
, s
)
369 if (s
->line_charpos
!= NULL
)
371 xfree (s
->line_charpos
);
372 s
->line_charpos
= NULL
;
374 if (s
->fullname
!= NULL
)
382 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
385 /* Forget what we learned about line positions in source files, and
386 which directories contain them; must check again now since files
387 may be found in a different directory now. */
390 forget_cached_source_info (void)
392 struct program_space
*pspace
;
393 struct objfile
*objfile
;
396 ALL_PSPACE_OBJFILES (pspace
, objfile
)
398 forget_cached_source_info_for_objfile (objfile
);
401 last_source_visited
= NULL
;
405 init_source_path (void)
409 xsnprintf (buf
, sizeof (buf
), "$cdir%c$cwd", DIRNAME_SEPARATOR
);
410 source_path
= xstrdup (buf
);
411 forget_cached_source_info ();
414 /* Add zero or more directories to the front of the source path. */
417 directory_command (char *dirname
, int from_tty
)
420 /* FIXME, this goes to "delete dir"... */
423 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
431 mod_path (dirname
, &source_path
);
432 forget_cached_source_info ();
435 show_directories_1 ((char *) 0, from_tty
);
438 /* Add a path given with the -d command line switch.
439 This will not be quoted so we must not treat spaces as separators. */
442 directory_switch (char *dirname
, int from_tty
)
444 add_path (dirname
, &source_path
, 0);
447 /* Add zero or more directories to the front of an arbitrary path. */
450 mod_path (char *dirname
, char **which_path
)
452 add_path (dirname
, which_path
, 1);
455 /* Workhorse of mod_path. Takes an extra argument to determine
456 if dirname should be parsed for separators that indicate multiple
457 directories. This allows for interfaces that pre-parse the dirname
458 and allow specification of traditional separator characters such
462 add_path (char *dirname
, char **which_path
, int parse_separators
)
464 char *old
= *which_path
;
466 VEC (char_ptr
) *dir_vec
= NULL
;
467 struct cleanup
*back_to
;
474 if (parse_separators
)
476 char **argv
, **argvp
;
478 /* This will properly parse the space and tab separators
479 and any quotes that may exist. */
480 argv
= gdb_buildargv (dirname
);
482 for (argvp
= argv
; *argvp
; argvp
++)
483 dirnames_to_char_ptr_vec_append (&dir_vec
, *argvp
);
488 VEC_safe_push (char_ptr
, dir_vec
, xstrdup (dirname
));
489 back_to
= make_cleanup_free_char_ptr_vec (dir_vec
);
491 for (ix
= 0; VEC_iterate (char_ptr
, dir_vec
, ix
, name
); ++ix
)
496 /* Spaces and tabs will have been removed by buildargv().
497 NAME is the start of the directory.
498 P is the '\0' following the end. */
499 p
= name
+ strlen (name
);
501 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
502 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
503 /* On MS-DOS and MS-Windows, h:\ is different from h: */
504 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
506 && IS_DIR_SEPARATOR (p
[-1]))
507 /* Sigh. "foo/" => "foo" */
511 while (p
> name
&& p
[-1] == '.')
515 /* "." => getwd (). */
516 name
= current_directory
;
519 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
529 /* "...foo/." => "...foo". */
540 name
= tilde_expand (name
);
541 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
542 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
543 name
= concat (name
, ".", (char *)NULL
);
545 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
546 name
= concat (current_directory
, SLASH_STRING
, name
, (char *)NULL
);
548 name
= savestring (name
, p
- name
);
549 make_cleanup (xfree
, name
);
551 /* Unless it's a variable, check existence. */
554 /* These are warnings, not errors, since we don't want a
555 non-existent directory in a .gdbinit file to stop processing
556 of the .gdbinit file.
558 Whether they get added to the path is more debatable. Current
559 answer is yes, in case the user wants to go make the directory
560 or whatever. If the directory continues to not exist/not be
561 a directory/etc, then having them in the path should be
563 if (stat (name
, &st
) < 0)
565 int save_errno
= errno
;
567 fprintf_unfiltered (gdb_stderr
, "Warning: ");
568 print_sys_errmsg (name
, save_errno
);
570 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
571 warning (_("%s is not a directory."), name
);
576 unsigned int len
= strlen (name
);
580 /* FIXME: we should use realpath() or its work-alike
581 before comparing. Then all the code above which
582 removes excess slashes and dots could simply go away. */
583 if (!filename_cmp (p
, name
))
585 /* Found it in the search path, remove old copy. */
587 p
--; /* Back over leading separator. */
588 if (prefix
> p
- *which_path
)
589 goto skip_dup
; /* Same dir twice in one cmd. */
590 memmove (p
, &p
[len
+ 1], strlen (&p
[len
+ 1]) + 1); /* Copy from next \0 or : */
593 tinybuf
[0] = DIRNAME_SEPARATOR
;
596 /* If we have already tacked on a name(s) in this command,
597 be sure they stay on the front as we tack on some
605 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
607 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
608 prefix
= strlen (temp
);
613 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
615 prefix
= strlen (name
);
624 do_cleanups (back_to
);
629 source_info (char *ignore
, int from_tty
)
631 struct symtab
*s
= current_source_symtab
;
635 printf_filtered (_("No current source file.\n"));
638 printf_filtered (_("Current source file is %s\n"), s
->filename
);
640 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
642 printf_filtered (_("Located in %s\n"), s
->fullname
);
644 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
645 s
->nlines
== 1 ? "" : "s");
647 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
648 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
649 printf_filtered (_("%s preprocessor macro info.\n"),
650 s
->macro_table
? "Includes" : "Does not include");
654 /* Return True if the file NAME exists and is a regular file. */
656 is_regular_file (const char *name
)
659 const int status
= stat (name
, &st
);
661 /* Stat should never fail except when the file does not exist.
662 If stat fails, analyze the source of error and return True
663 unless the file does not exist, to avoid returning false results
664 on obscure systems where stat does not work as expected. */
667 return (errno
!= ENOENT
);
669 return S_ISREG (st
.st_mode
);
672 /* Open a file named STRING, searching path PATH (dir names sep by some char)
673 using mode MODE in the calls to open. You cannot use this function to
674 create files (O_CREAT).
676 OPTS specifies the function behaviour in specific cases.
678 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
679 (ie pretend the first element of PATH is "."). This also indicates
680 that a slash in STRING disables searching of the path (this is
681 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
682 get that particular version of foo or an error message).
684 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
685 searched in path (we usually want this for source files but not for
688 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
689 the actual file opened (this string will always start with a "/"). We
690 have to take special pains to avoid doubling the "/" between the directory
691 and the file, sigh! Emacs gets confuzzed by this when we print the
694 If a file is found, return the descriptor.
695 Otherwise, return -1, with errno set for the last name we tried to open. */
697 /* >>>> This should only allow files of certain types,
698 >>>> eg executable, non-directory. */
700 openp (const char *path
, int opts
, const char *string
,
701 int mode
, char **filename_opened
)
706 VEC (char_ptr
) *dir_vec
;
707 struct cleanup
*back_to
;
711 /* The open syscall MODE parameter is not specified. */
712 gdb_assert ((mode
& O_CREAT
) == 0);
713 gdb_assert (string
!= NULL
);
715 /* A file with an empty name cannot possibly exist. Report a failure
716 without further checking.
718 This is an optimization which also defends us against buggy
719 implementations of the "stat" function. For instance, we have
720 noticed that a MinGW debugger built on Windows XP 32bits crashes
721 when the debugger is started with an empty argument. */
722 if (string
[0] == '\0')
733 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
737 if (is_regular_file (string
))
739 filename
= alloca (strlen (string
) + 1);
740 strcpy (filename
, string
);
741 fd
= gdb_open_cloexec (filename
, mode
, 0);
751 if (!(opts
& OPF_SEARCH_IN_PATH
))
752 for (i
= 0; string
[i
]; i
++)
753 if (IS_DIR_SEPARATOR (string
[i
]))
757 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
758 if (HAS_DRIVE_SPEC (string
))
759 string
= STRIP_DRIVE_SPEC (string
);
761 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
762 while (IS_DIR_SEPARATOR(string
[0]))
766 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
769 alloclen
= strlen (path
) + strlen (string
) + 2;
770 filename
= alloca (alloclen
);
773 dir_vec
= dirnames_to_char_ptr_vec (path
);
774 back_to
= make_cleanup_free_char_ptr_vec (dir_vec
);
776 for (ix
= 0; VEC_iterate (char_ptr
, dir_vec
, ix
, dir
); ++ix
)
778 size_t len
= strlen (dir
);
780 if (strcmp (dir
, "$cwd") == 0)
782 /* Name is $cwd -- insert current directory name instead. */
785 /* First, realloc the filename buffer if too short. */
786 len
= strlen (current_directory
);
787 newlen
= len
+ strlen (string
) + 2;
788 if (newlen
> alloclen
)
791 filename
= alloca (alloclen
);
793 strcpy (filename
, current_directory
);
795 else if (strchr(dir
, '~'))
797 /* See whether we need to expand the tilde. */
799 char *tilde_expanded
;
801 tilde_expanded
= tilde_expand (dir
);
803 /* First, realloc the filename buffer if too short. */
804 len
= strlen (tilde_expanded
);
805 newlen
= len
+ strlen (string
) + 2;
806 if (newlen
> alloclen
)
809 filename
= alloca (alloclen
);
811 strcpy (filename
, tilde_expanded
);
812 xfree (tilde_expanded
);
816 /* Normal file name in path -- just use it. */
817 strcpy (filename
, dir
);
819 /* Don't search $cdir. It's also a magic path like $cwd, but we
820 don't have enough information to expand it. The user *could*
821 have an actual directory named '$cdir' but handling that would
822 be confusing, it would mean different things in different
823 contexts. If the user really has '$cdir' one can use './$cdir'.
824 We can get $cdir when loading scripts. When loading source files
825 $cdir must have already been expanded to the correct value. */
826 if (strcmp (dir
, "$cdir") == 0)
830 /* Remove trailing slashes. */
831 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
834 strcat (filename
+ len
, SLASH_STRING
);
835 strcat (filename
, string
);
837 if (is_regular_file (filename
))
839 fd
= gdb_open_cloexec (filename
, mode
, 0);
845 do_cleanups (back_to
);
850 /* If a file was opened, canonicalize its filename. */
852 *filename_opened
= NULL
;
853 else if (IS_ABSOLUTE_PATH (filename
))
854 *filename_opened
= gdb_realpath (filename
);
857 /* Beware the // my son, the Emacs barfs, the botch that catch... */
859 char *f
= concat (current_directory
,
860 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
862 filename
, (char *)NULL
);
864 *filename_opened
= gdb_realpath (f
);
873 /* This is essentially a convenience, for clients that want the behaviour
874 of openp, using source_path, but that really don't want the file to be
875 opened but want instead just to know what the full pathname is (as
876 qualified against source_path).
878 The current working directory is searched first.
880 If the file was found, this function returns 1, and FULL_PATHNAME is
881 set to the fully-qualified pathname.
883 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
885 source_full_path_of (const char *filename
, char **full_pathname
)
889 fd
= openp (source_path
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
890 O_RDONLY
, full_pathname
);
893 *full_pathname
= NULL
;
901 /* Return non-zero if RULE matches PATH, that is if the rule can be
905 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
908 const int from_len
= strlen (rule
->from
);
909 const int path_len
= strlen (path
);
912 if (path_len
< from_len
)
915 /* The substitution rules are anchored at the start of the path,
916 so the path should start with rule->from. There is no filename
917 comparison routine, so we need to extract the first FROM_LEN
918 characters from PATH first and use that to do the comparison. */
920 path_start
= alloca (from_len
+ 1);
921 strncpy (path_start
, path
, from_len
);
922 path_start
[from_len
] = '\0';
924 if (FILENAME_CMP (path_start
, rule
->from
) != 0)
927 /* Make sure that the region in the path that matches the substitution
928 rule is immediately followed by a directory separator (or the end of
929 string character). */
931 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
937 /* Find the substitute-path rule that applies to PATH and return it.
938 Return NULL if no rule applies. */
940 static struct substitute_path_rule
*
941 get_substitute_path_rule (const char *path
)
943 struct substitute_path_rule
*rule
= substitute_path_rules
;
945 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
951 /* If the user specified a source path substitution rule that applies
952 to PATH, then apply it and return the new path. This new path must
953 be deallocated afterwards.
955 Return NULL if no substitution rule was specified by the user,
956 or if no rule applied to the given PATH. */
959 rewrite_source_path (const char *path
)
961 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
968 from_len
= strlen (rule
->from
);
970 /* Compute the rewritten path and return it. */
973 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
974 strcpy (new_path
, rule
->to
);
975 strcat (new_path
, path
+ from_len
);
981 find_and_open_source (const char *filename
,
985 char *path
= source_path
;
989 /* Quick way out if we already know its full name. */
993 /* The user may have requested that source paths be rewritten
994 according to substitution rules he provided. If a substitution
995 rule applies to this path, then apply it. */
996 char *rewritten_fullname
= rewrite_source_path (*fullname
);
998 if (rewritten_fullname
!= NULL
)
1001 *fullname
= rewritten_fullname
;
1004 result
= gdb_open_cloexec (*fullname
, OPEN_MODE
, 0);
1007 char *lpath
= gdb_realpath (*fullname
);
1014 /* Didn't work -- free old one, try again. */
1019 if (dirname
!= NULL
)
1021 /* If necessary, rewrite the compilation directory name according
1022 to the source path substitution rules specified by the user. */
1024 char *rewritten_dirname
= rewrite_source_path (dirname
);
1026 if (rewritten_dirname
!= NULL
)
1028 make_cleanup (xfree
, rewritten_dirname
);
1029 dirname
= rewritten_dirname
;
1032 /* Replace a path entry of $cdir with the compilation directory
1035 /* We cast strstr's result in case an ANSIhole has made it const,
1036 which produces a "required warning" when assigned to a nonconst. */
1037 p
= (char *) strstr (source_path
, "$cdir");
1038 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1039 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1044 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1045 len
= p
- source_path
;
1046 strncpy (path
, source_path
, len
); /* Before $cdir */
1047 strcpy (path
+ len
, dirname
); /* new stuff */
1048 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1053 if (IS_ABSOLUTE_PATH (filename
))
1055 /* If filename is absolute path, try the source path
1056 substitution on it. */
1057 char *rewritten_filename
= rewrite_source_path (filename
);
1059 if (rewritten_filename
!= NULL
)
1061 make_cleanup (xfree
, rewritten_filename
);
1062 filename
= rewritten_filename
;
1066 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, fullname
);
1069 /* Didn't work. Try using just the basename. */
1070 p
= lbasename (filename
);
1072 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, fullname
);
1078 /* Open a source file given a symtab S. Returns a file descriptor or
1079 negative number for error.
1081 This function is a convience function to find_and_open_source. */
1084 open_source_file (struct symtab
*s
)
1089 return find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1092 /* Finds the fullname that a symtab represents.
1094 This functions finds the fullname and saves it in s->fullname.
1095 It will also return the value.
1097 If this function fails to find the file that this symtab represents,
1098 the expected fullname is used. Therefore the files does not have to
1102 symtab_to_fullname (struct symtab
*s
)
1104 /* Use cached copy if we have it.
1105 We rely on forget_cached_source_info being called appropriately
1106 to handle cases like the file being moved. */
1107 if (s
->fullname
== NULL
)
1109 int fd
= find_and_open_source (s
->filename
, s
->dirname
, &s
->fullname
);
1116 struct cleanup
*back_to
;
1118 /* rewrite_source_path would be applied by find_and_open_source, we
1119 should report the pathname where GDB tried to find the file. */
1121 if (s
->dirname
== NULL
|| IS_ABSOLUTE_PATH (s
->filename
))
1122 fullname
= xstrdup (s
->filename
);
1124 fullname
= concat (s
->dirname
, SLASH_STRING
, s
->filename
, NULL
);
1126 back_to
= make_cleanup (xfree
, fullname
);
1127 s
->fullname
= rewrite_source_path (fullname
);
1128 if (s
->fullname
== NULL
)
1129 s
->fullname
= xstrdup (fullname
);
1130 do_cleanups (back_to
);
1137 /* See commentary in source.h. */
1140 symtab_to_filename_for_display (struct symtab
*symtab
)
1142 if (filename_display_string
== filename_display_basename
)
1143 return lbasename (symtab
->filename
);
1144 else if (filename_display_string
== filename_display_absolute
)
1145 return symtab_to_fullname (symtab
);
1146 else if (filename_display_string
== filename_display_relative
)
1147 return symtab
->filename
;
1149 internal_error (__FILE__
, __LINE__
, _("invalid filename_display_string"));
1152 /* Create and initialize the table S->line_charpos that records
1153 the positions of the lines in the source file, which is assumed
1154 to be open on descriptor DESC.
1155 All set S->nlines to the number of such lines. */
1158 find_source_lines (struct symtab
*s
, int desc
)
1161 char *data
, *p
, *end
;
1163 int lines_allocated
= 1000;
1169 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
1170 if (fstat (desc
, &st
) < 0)
1171 perror_with_name (symtab_to_filename_for_display (s
));
1173 if (s
->objfile
&& s
->objfile
->obfd
)
1174 mtime
= s
->objfile
->mtime
;
1176 mtime
= exec_bfd_mtime
;
1178 if (mtime
&& mtime
< st
.st_mtime
)
1179 warning (_("Source file is more recent than executable."));
1182 struct cleanup
*old_cleanups
;
1184 /* st_size might be a large type, but we only support source files whose
1185 size fits in an int. */
1186 size
= (int) st
.st_size
;
1188 /* Use malloc, not alloca, because this may be pretty large, and we may
1189 run into various kinds of limits on stack size. */
1190 data
= (char *) xmalloc (size
);
1191 old_cleanups
= make_cleanup (xfree
, data
);
1193 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1194 size
= myread (desc
, data
, size
);
1196 perror_with_name (symtab_to_filename_for_display (s
));
1199 line_charpos
[0] = 0;
1204 /* A newline at the end does not start a new line. */
1207 if (nlines
== lines_allocated
)
1209 lines_allocated
*= 2;
1211 (int *) xrealloc ((char *) line_charpos
,
1212 sizeof (int) * lines_allocated
);
1214 line_charpos
[nlines
++] = p
- data
;
1217 do_cleanups (old_cleanups
);
1222 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1228 /* Get full pathname and line number positions for a symtab.
1229 Return nonzero if line numbers may have changed.
1230 Set *FULLNAME to actual name of the file as found by `openp',
1231 or to 0 if the file is not found. */
1234 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1236 int desc
, linenums_changed
= 0;
1237 struct cleanup
*cleanups
;
1239 desc
= open_source_file (s
);
1246 cleanups
= make_cleanup_close (desc
);
1248 *fullname
= s
->fullname
;
1249 if (s
->line_charpos
== 0)
1250 linenums_changed
= 1;
1251 if (linenums_changed
)
1252 find_source_lines (s
, desc
);
1253 do_cleanups (cleanups
);
1254 return linenums_changed
;
1257 /* Print text describing the full name of the source file S
1258 and the line number LINE and its corresponding character position.
1259 The text starts with two Ctrl-z so that the Emacs-GDB interface
1262 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1264 Return 1 if successful, 0 if could not find the file. */
1267 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1270 if (s
->line_charpos
== 0)
1271 get_filename_and_charpos (s
, (char **) NULL
);
1272 if (s
->fullname
== 0)
1274 if (line
> s
->nlines
)
1275 /* Don't index off the end of the line_charpos array. */
1277 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1278 mid_statement
, get_objfile_arch (s
->objfile
), pc
);
1280 current_source_line
= line
;
1281 first_line_listed
= line
;
1282 last_line_listed
= line
;
1283 current_source_symtab
= s
;
1288 /* Print source lines from the file of symtab S,
1289 starting with line number LINE and stopping before line number STOPLINE. */
1292 print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1293 enum print_source_lines_flags flags
)
1299 int nlines
= stopline
- line
;
1300 struct cleanup
*cleanup
;
1301 struct ui_out
*uiout
= current_uiout
;
1303 /* Regardless of whether we can open the file, set current_source_symtab. */
1304 current_source_symtab
= s
;
1305 current_source_line
= line
;
1306 first_line_listed
= line
;
1308 /* If printing of source lines is disabled, just print file and line
1310 if (ui_out_test_flags (uiout
, ui_source_list
))
1312 /* Only prints "No such file or directory" once. */
1313 if ((s
!= last_source_visited
) || (!last_source_error
))
1315 last_source_visited
= s
;
1316 desc
= open_source_file (s
);
1320 desc
= last_source_error
;
1321 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1326 desc
= last_source_error
;
1327 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1331 if (desc
< 0 || noprint
)
1333 last_source_error
= desc
;
1335 if (!(flags
& PRINT_SOURCE_LINES_NOERROR
))
1337 const char *filename
= symtab_to_filename_for_display (s
);
1338 int len
= strlen (filename
) + 100;
1339 char *name
= alloca (len
);
1341 xsnprintf (name
, len
, "%d\t%s", line
, filename
);
1342 print_sys_errmsg (name
, errno
);
1346 ui_out_field_int (uiout
, "line", line
);
1347 ui_out_text (uiout
, "\tin ");
1349 /* CLI expects only the "file" field. TUI expects only the
1350 "fullname" field (and TUI does break if "file" is printed).
1351 MI expects both fields. ui_source_list is set only for CLI,
1353 if (ui_out_is_mi_like_p (uiout
)
1354 || ui_out_test_flags (uiout
, ui_source_list
))
1355 ui_out_field_string (uiout
, "file",
1356 symtab_to_filename_for_display (s
));
1357 if (ui_out_is_mi_like_p (uiout
)
1358 || !ui_out_test_flags (uiout
, ui_source_list
))
1360 const char *s_fullname
= symtab_to_fullname (s
);
1361 char *local_fullname
;
1363 /* ui_out_field_string may free S_FULLNAME by calling
1364 open_source_file for it again. See e.g.,
1365 tui_field_string->tui_show_source. */
1366 local_fullname
= alloca (strlen (s_fullname
) + 1);
1367 strcpy (local_fullname
, s_fullname
);
1369 ui_out_field_string (uiout
, "fullname", local_fullname
);
1372 ui_out_text (uiout
, "\n");
1378 last_source_error
= 0;
1380 if (s
->line_charpos
== 0)
1381 find_source_lines (s
, desc
);
1383 if (line
< 1 || line
> s
->nlines
)
1386 error (_("Line number %d out of range; %s has %d lines."),
1387 line
, symtab_to_filename_for_display (s
), s
->nlines
);
1390 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1393 perror_with_name (symtab_to_filename_for_display (s
));
1396 stream
= fdopen (desc
, FDOPEN_MODE
);
1398 cleanup
= make_cleanup_fclose (stream
);
1400 while (nlines
-- > 0)
1407 last_line_listed
= current_source_line
;
1408 if (flags
& PRINT_SOURCE_LINES_FILENAME
)
1410 ui_out_text (uiout
, symtab_to_filename_for_display (s
));
1411 ui_out_text (uiout
, ":");
1413 xsnprintf (buf
, sizeof (buf
), "%d\t", current_source_line
++);
1414 ui_out_text (uiout
, buf
);
1417 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1419 xsnprintf (buf
, sizeof (buf
), "^%c", c
+ 0100);
1420 ui_out_text (uiout
, buf
);
1423 ui_out_text (uiout
, "^?");
1426 /* Skip a \r character, but only before a \n. */
1427 int c1
= fgetc (stream
);
1430 printf_filtered ("^%c", c
+ 0100);
1432 ungetc (c1
, stream
);
1436 xsnprintf (buf
, sizeof (buf
), "%c", c
);
1437 ui_out_text (uiout
, buf
);
1440 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1443 do_cleanups (cleanup
);
1446 /* Show source lines from the file of symtab S, starting with line
1447 number LINE and stopping before line number STOPLINE. If this is
1448 not the command line version, then the source is shown in the source
1449 window otherwise it is simply printed. */
1452 print_source_lines (struct symtab
*s
, int line
, int stopline
,
1453 enum print_source_lines_flags flags
)
1455 print_source_lines_base (s
, line
, stopline
, flags
);
1458 /* Print info on range of pc's in a specified line. */
1461 line_info (char *arg
, int from_tty
)
1463 struct symtabs_and_lines sals
;
1464 struct symtab_and_line sal
;
1465 CORE_ADDR start_pc
, end_pc
;
1467 struct cleanup
*cleanups
;
1469 init_sal (&sal
); /* initialize to zeroes */
1473 sal
.symtab
= current_source_symtab
;
1474 sal
.pspace
= current_program_space
;
1475 sal
.line
= last_line_listed
;
1477 sals
.sals
= (struct symtab_and_line
*)
1478 xmalloc (sizeof (struct symtab_and_line
));
1483 sals
= decode_line_with_last_displayed (arg
, DECODE_LINE_LIST_MODE
);
1488 cleanups
= make_cleanup (xfree
, sals
.sals
);
1490 /* C++ More than one line may have been specified, as when the user
1491 specifies an overloaded function name. Print info on them all. */
1492 for (i
= 0; i
< sals
.nelts
; i
++)
1495 if (sal
.pspace
!= current_program_space
)
1498 if (sal
.symtab
== 0)
1500 struct gdbarch
*gdbarch
= get_current_arch ();
1502 printf_filtered (_("No line number information available"));
1505 /* This is useful for "info line *0x7f34". If we can't tell the
1506 user about a source line, at least let them have the symbolic
1508 printf_filtered (" for address ");
1510 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1513 printf_filtered (".");
1514 printf_filtered ("\n");
1516 else if (sal
.line
> 0
1517 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1519 struct gdbarch
*gdbarch
= get_objfile_arch (sal
.symtab
->objfile
);
1521 if (start_pc
== end_pc
)
1523 printf_filtered ("Line %d of \"%s\"",
1525 symtab_to_filename_for_display (sal
.symtab
));
1527 printf_filtered (" is at address ");
1528 print_address (gdbarch
, start_pc
, gdb_stdout
);
1530 printf_filtered (" but contains no code.\n");
1534 printf_filtered ("Line %d of \"%s\"",
1536 symtab_to_filename_for_display (sal
.symtab
));
1538 printf_filtered (" starts at address ");
1539 print_address (gdbarch
, start_pc
, gdb_stdout
);
1541 printf_filtered (" and ends at ");
1542 print_address (gdbarch
, end_pc
, gdb_stdout
);
1543 printf_filtered (".\n");
1546 /* x/i should display this line's code. */
1547 set_next_address (gdbarch
, start_pc
);
1549 /* Repeating "info line" should do the following line. */
1550 last_line_listed
= sal
.line
+ 1;
1552 /* If this is the only line, show the source code. If it could
1553 not find the file, don't do anything special. */
1554 if (annotation_level
&& sals
.nelts
== 1)
1555 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1558 /* Is there any case in which we get here, and have an address
1559 which the user would want to see? If we have debugging symbols
1560 and no line numbers? */
1561 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1562 sal
.line
, symtab_to_filename_for_display (sal
.symtab
));
1564 do_cleanups (cleanups
);
1567 /* Commands to search the source file for a regexp. */
1570 forward_search_command (char *regex
, int from_tty
)
1577 struct cleanup
*cleanups
;
1579 line
= last_line_listed
+ 1;
1581 msg
= (char *) re_comp (regex
);
1583 error (("%s"), msg
);
1585 if (current_source_symtab
== 0)
1586 select_source_symtab (0);
1588 desc
= open_source_file (current_source_symtab
);
1590 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1591 cleanups
= make_cleanup_close (desc
);
1593 if (current_source_symtab
->line_charpos
== 0)
1594 find_source_lines (current_source_symtab
, desc
);
1596 if (line
< 1 || line
> current_source_symtab
->nlines
)
1597 error (_("Expression not found"));
1599 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1600 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1602 discard_cleanups (cleanups
);
1603 stream
= fdopen (desc
, FDOPEN_MODE
);
1605 cleanups
= make_cleanup_fclose (stream
);
1608 static char *buf
= NULL
;
1610 int cursize
, newsize
;
1613 buf
= xmalloc (cursize
);
1622 if (p
- buf
== cursize
)
1624 newsize
= cursize
+ cursize
/ 2;
1625 buf
= xrealloc (buf
, newsize
);
1630 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1632 /* Remove the \r, if any, at the end of the line, otherwise
1633 regular expressions that end with $ or \n won't work. */
1634 if (p
- buf
> 1 && p
[-2] == '\r')
1640 /* We now have a source line in buf, null terminate and match. */
1642 if (re_exec (buf
) > 0)
1645 do_cleanups (cleanups
);
1646 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1647 set_internalvar_integer (lookup_internalvar ("_"), line
);
1648 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1654 printf_filtered (_("Expression not found\n"));
1655 do_cleanups (cleanups
);
1659 reverse_search_command (char *regex
, int from_tty
)
1666 struct cleanup
*cleanups
;
1668 line
= last_line_listed
- 1;
1670 msg
= (char *) re_comp (regex
);
1672 error (("%s"), msg
);
1674 if (current_source_symtab
== 0)
1675 select_source_symtab (0);
1677 desc
= open_source_file (current_source_symtab
);
1679 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1680 cleanups
= make_cleanup_close (desc
);
1682 if (current_source_symtab
->line_charpos
== 0)
1683 find_source_lines (current_source_symtab
, desc
);
1685 if (line
< 1 || line
> current_source_symtab
->nlines
)
1686 error (_("Expression not found"));
1688 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1689 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1691 discard_cleanups (cleanups
);
1692 stream
= fdopen (desc
, FDOPEN_MODE
);
1694 cleanups
= make_cleanup_fclose (stream
);
1697 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1698 char buf
[4096]; /* Should be reasonable??? */
1708 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1710 /* Remove the \r, if any, at the end of the line, otherwise
1711 regular expressions that end with $ or \n won't work. */
1712 if (p
- buf
> 1 && p
[-2] == '\r')
1718 /* We now have a source line in buf; null terminate and match. */
1720 if (re_exec (buf
) > 0)
1723 do_cleanups (cleanups
);
1724 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1725 set_internalvar_integer (lookup_internalvar ("_"), line
);
1726 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1730 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1732 const char *filename
;
1734 do_cleanups (cleanups
);
1735 filename
= symtab_to_filename_for_display (current_source_symtab
);
1736 perror_with_name (filename
);
1740 printf_filtered (_("Expression not found\n"));
1741 do_cleanups (cleanups
);
1745 /* If the last character of PATH is a directory separator, then strip it. */
1748 strip_trailing_directory_separator (char *path
)
1750 const int last
= strlen (path
) - 1;
1753 return; /* No stripping is needed if PATH is the empty string. */
1755 if (IS_DIR_SEPARATOR (path
[last
]))
1759 /* Return the path substitution rule that matches FROM.
1760 Return NULL if no rule matches. */
1762 static struct substitute_path_rule
*
1763 find_substitute_path_rule (const char *from
)
1765 struct substitute_path_rule
*rule
= substitute_path_rules
;
1767 while (rule
!= NULL
)
1769 if (FILENAME_CMP (rule
->from
, from
) == 0)
1777 /* Add a new substitute-path rule at the end of the current list of rules.
1778 The new rule will replace FROM into TO. */
1781 add_substitute_path_rule (char *from
, char *to
)
1783 struct substitute_path_rule
*rule
;
1784 struct substitute_path_rule
*new_rule
;
1786 new_rule
= xmalloc (sizeof (struct substitute_path_rule
));
1787 new_rule
->from
= xstrdup (from
);
1788 new_rule
->to
= xstrdup (to
);
1789 new_rule
->next
= NULL
;
1791 /* If the list of rules are empty, then insert the new rule
1792 at the head of the list. */
1794 if (substitute_path_rules
== NULL
)
1796 substitute_path_rules
= new_rule
;
1800 /* Otherwise, skip to the last rule in our list and then append
1803 rule
= substitute_path_rules
;
1804 while (rule
->next
!= NULL
)
1807 rule
->next
= new_rule
;
1810 /* Remove the given source path substitution rule from the current list
1811 of rules. The memory allocated for that rule is also deallocated. */
1814 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1816 if (rule
== substitute_path_rules
)
1817 substitute_path_rules
= rule
->next
;
1820 struct substitute_path_rule
*prev
= substitute_path_rules
;
1822 while (prev
!= NULL
&& prev
->next
!= rule
)
1825 gdb_assert (prev
!= NULL
);
1827 prev
->next
= rule
->next
;
1835 /* Implement the "show substitute-path" command. */
1838 show_substitute_path_command (char *args
, int from_tty
)
1840 struct substitute_path_rule
*rule
= substitute_path_rules
;
1844 argv
= gdb_buildargv (args
);
1845 make_cleanup_freeargv (argv
);
1847 /* We expect zero or one argument. */
1849 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1850 error (_("Too many arguments in command"));
1852 if (argv
!= NULL
&& argv
[0] != NULL
)
1855 /* Print the substitution rules. */
1859 (_("Source path substitution rule matching `%s':\n"), from
);
1861 printf_filtered (_("List of all source path substitution rules:\n"));
1863 while (rule
!= NULL
)
1865 if (from
== NULL
|| FILENAME_CMP (rule
->from
, from
) == 0)
1866 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1871 /* Implement the "unset substitute-path" command. */
1874 unset_substitute_path_command (char *args
, int from_tty
)
1876 struct substitute_path_rule
*rule
= substitute_path_rules
;
1877 char **argv
= gdb_buildargv (args
);
1881 /* This function takes either 0 or 1 argument. */
1883 make_cleanup_freeargv (argv
);
1884 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1885 error (_("Incorrect usage, too many arguments in command"));
1887 if (argv
!= NULL
&& argv
[0] != NULL
)
1890 /* If the user asked for all the rules to be deleted, ask him
1891 to confirm and give him a chance to abort before the action
1895 && !query (_("Delete all source path substitution rules? ")))
1896 error (_("Canceled"));
1898 /* Delete the rule matching the argument. No argument means that
1899 all rules should be deleted. */
1901 while (rule
!= NULL
)
1903 struct substitute_path_rule
*next
= rule
->next
;
1905 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1907 delete_substitute_path_rule (rule
);
1914 /* If the user asked for a specific rule to be deleted but
1915 we could not find it, then report an error. */
1917 if (from
!= NULL
&& !rule_found
)
1918 error (_("No substitution rule defined for `%s'"), from
);
1920 forget_cached_source_info ();
1923 /* Add a new source path substitution rule. */
1926 set_substitute_path_command (char *args
, int from_tty
)
1929 struct substitute_path_rule
*rule
;
1931 argv
= gdb_buildargv (args
);
1932 make_cleanup_freeargv (argv
);
1934 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1935 error (_("Incorrect usage, too few arguments in command"));
1937 if (argv
[2] != NULL
)
1938 error (_("Incorrect usage, too many arguments in command"));
1940 if (*(argv
[0]) == '\0')
1941 error (_("First argument must be at least one character long"));
1943 /* Strip any trailing directory separator character in either FROM
1944 or TO. The substitution rule already implicitly contains them. */
1945 strip_trailing_directory_separator (argv
[0]);
1946 strip_trailing_directory_separator (argv
[1]);
1948 /* If a rule with the same "from" was previously defined, then
1949 delete it. This new rule replaces it. */
1951 rule
= find_substitute_path_rule (argv
[0]);
1953 delete_substitute_path_rule (rule
);
1955 /* Insert the new substitution rule. */
1957 add_substitute_path_rule (argv
[0], argv
[1]);
1958 forget_cached_source_info ();
1963 _initialize_source (void)
1965 struct cmd_list_element
*c
;
1967 current_source_symtab
= 0;
1968 init_source_path ();
1970 /* The intention is to use POSIX Basic Regular Expressions.
1971 Always use the GNU regex routine for consistency across all hosts.
1972 Our current GNU regex.c does not have all the POSIX features, so this is
1973 just an approximation. */
1974 re_set_syntax (RE_SYNTAX_GREP
);
1976 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1977 Add directory DIR to beginning of search path for source files.\n\
1978 Forget cached info on source file locations and line positions.\n\
1979 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1980 directory in which the source file was compiled into object code.\n\
1981 With no argument, reset the search path to $cdir:$cwd, the default."),
1985 add_com_alias ("use", "directory", class_files
, 0);
1987 set_cmd_completer (c
, filename_completer
);
1989 add_setshow_optional_filename_cmd ("directories",
1993 Set the search path for finding source files."),
1995 Show the search path for finding source files."),
1997 $cwd in the path means the current working directory.\n\
1998 $cdir in the path means the compilation directory of the source file.\n\
1999 GDB ensures the search path always ends with $cdir:$cwd by\n\
2000 appending these directories if necessary.\n\
2001 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
2002 set_directories_command
,
2003 show_directories_command
,
2004 &setlist
, &showlist
);
2008 add_com_alias ("D", "directory", class_files
, 0);
2009 add_cmd ("ld", no_class
, show_directories_1
, _("\
2010 Current search path for finding source files.\n\
2011 $cwd in the path means the current working directory.\n\
2012 $cdir in the path means the compilation directory of the source file."),
2016 add_info ("source", source_info
,
2017 _("Information about the current source file."));
2019 add_info ("line", line_info
, _("\
2020 Core addresses of the code for a source line.\n\
2021 Line can be specified as\n\
2022 LINENUM, to list around that line in current file,\n\
2023 FILE:LINENUM, to list around that line in that file,\n\
2024 FUNCTION, to list around beginning of that function,\n\
2025 FILE:FUNCTION, to distinguish among like-named static functions.\n\
2026 Default is to describe the last source line that was listed.\n\n\
2027 This sets the default address for \"x\" to the line's first instruction\n\
2028 so that \"x/i\" suffices to start examining the machine code.\n\
2029 The address is also stored as the value of \"$_\"."));
2031 add_com ("forward-search", class_files
, forward_search_command
, _("\
2032 Search for regular expression (see regex(3)) from last line listed.\n\
2033 The matching line number is also stored as the value of \"$_\"."));
2034 add_com_alias ("search", "forward-search", class_files
, 0);
2035 add_com_alias ("fo", "forward-search", class_files
, 1);
2037 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
2038 Search backward for regular expression (see regex(3)) from last line listed.\n\
2039 The matching line number is also stored as the value of \"$_\"."));
2040 add_com_alias ("rev", "reverse-search", class_files
, 1);
2044 add_com_alias ("/", "forward-search", class_files
, 0);
2045 add_com_alias ("?", "reverse-search", class_files
, 0);
2048 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
2049 Set number of source lines gdb will list by default."), _("\
2050 Show number of source lines gdb will list by default."), _("\
2051 Use this to choose how many source lines the \"list\" displays (unless\n\
2052 the \"list\" argument explicitly specifies some other number).\n\
2053 A value of \"unlimited\", or zero, means there's no limit."),
2056 &setlist
, &showlist
);
2058 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
2060 Usage: set substitute-path FROM TO\n\
2061 Add a substitution rule replacing FROM into TO in source file names.\n\
2062 If a substitution rule was previously set for FROM, the old rule\n\
2063 is replaced by the new one."),
2066 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
2068 Usage: unset substitute-path [FROM]\n\
2069 Delete the rule for substituting FROM in source file names. If FROM\n\
2070 is not specified, all substituting rules are deleted.\n\
2071 If the debugger cannot find a rule for FROM, it will display a warning."),
2074 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
2076 Usage: show substitute-path [FROM]\n\
2077 Print the rule for substituting FROM in source file names. If FROM\n\
2078 is not specified, print all substitution rules."),
2081 add_setshow_enum_cmd ("filename-display", class_files
,
2082 filename_display_kind_names
,
2083 &filename_display_string
, _("\
2084 Set how to display filenames."), _("\
2085 Show how to display filenames."), _("\
2086 filename-display can be:\n\
2087 basename - display only basename of a filename\n\
2088 relative - display a filename relative to the compilation directory\n\
2089 absolute - display an absolute filename\n\
2090 By default, relative filenames are displayed."),
2092 show_filename_display_string
,
2093 &setlist
, &showlist
);