1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1986-2017 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 "filestuff.h"
31 #include <sys/types.h>
35 #include "gdb_regex.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "completer.h"
44 #include "readline/readline.h"
45 #include "common/enum-flags.h"
48 #define OPEN_MODE (O_RDONLY | O_BINARY)
49 #define FDOPEN_MODE FOPEN_RB
51 /* Prototypes for exported functions. */
53 void _initialize_source (void);
55 /* Prototypes for local functions. */
57 static int get_filename_and_charpos (struct symtab
*, char **);
59 static void reverse_search_command (char *, int);
61 static void forward_search_command (char *, int);
63 static void info_line_command (char *, int);
65 static void info_source_command (char *, int);
67 /* Path of directories to search for source files.
68 Same format as the PATH environment variable's value. */
72 /* Support for source path substitution commands. */
74 struct substitute_path_rule
78 struct substitute_path_rule
*next
;
81 static struct substitute_path_rule
*substitute_path_rules
= NULL
;
83 /* Symtab of default file for listing lines of. */
85 static struct symtab
*current_source_symtab
;
87 /* Default next line to list. */
89 static int current_source_line
;
91 static struct program_space
*current_source_pspace
;
93 /* Default number of lines to print with commands like "list".
94 This is based on guessing how many long (i.e. more than chars_per_line
95 characters) lines there will be. To be completely correct, "list"
96 and friends should be rewritten to count characters and see where
97 things are wrapping, but that would be a fair amount of work. */
99 static int lines_to_list
= 10;
101 show_lines_to_list (struct ui_file
*file
, int from_tty
,
102 struct cmd_list_element
*c
, const char *value
)
104 fprintf_filtered (file
,
105 _("Number of source lines gdb "
106 "will list by default is %s.\n"),
110 /* Possible values of 'set filename-display'. */
111 static const char filename_display_basename
[] = "basename";
112 static const char filename_display_relative
[] = "relative";
113 static const char filename_display_absolute
[] = "absolute";
115 static const char *const filename_display_kind_names
[] = {
116 filename_display_basename
,
117 filename_display_relative
,
118 filename_display_absolute
,
122 static const char *filename_display_string
= filename_display_relative
;
125 show_filename_display_string (struct ui_file
*file
, int from_tty
,
126 struct cmd_list_element
*c
, const char *value
)
128 fprintf_filtered (file
, _("Filenames are displayed as \"%s\".\n"), value
);
131 /* Line number of last line printed. Default for various commands.
132 current_source_line is usually, but not always, the same as this. */
134 static int last_line_listed
;
136 /* First line number listed by last listing command. If 0, then no
137 source lines have yet been listed since the last time the current
138 source line was changed. */
140 static int first_line_listed
;
142 /* Saves the name of the last source file visited and a possible error code.
143 Used to prevent repeating annoying "No such file or directories" msgs. */
145 static struct symtab
*last_source_visited
= NULL
;
146 static int last_source_error
= 0;
148 /* Return the first line listed by print_source_lines.
149 Used by command interpreters to request listing from
153 get_first_line_listed (void)
155 return first_line_listed
;
158 /* Clear line listed range. This makes the next "list" center the
159 printed source lines around the current source line. */
162 clear_lines_listed_range (void)
164 first_line_listed
= 0;
165 last_line_listed
= 0;
168 /* Return the default number of lines to print with commands like the
169 cli "list". The caller of print_source_lines must use this to
170 calculate the end line and use it in the call to print_source_lines
171 as it does not automatically use this value. */
174 get_lines_to_list (void)
176 return lines_to_list
;
179 /* Return the current source file for listing and next line to list.
180 NOTE: The returned sal pc and end fields are not valid. */
182 struct symtab_and_line
183 get_current_source_symtab_and_line (void)
185 struct symtab_and_line cursal
= { 0 };
187 cursal
.pspace
= current_source_pspace
;
188 cursal
.symtab
= current_source_symtab
;
189 cursal
.line
= current_source_line
;
196 /* If the current source file for listing is not set, try and get a default.
197 Usually called before get_current_source_symtab_and_line() is called.
198 It may err out if a default cannot be determined.
199 We must be cautious about where it is called, as it can recurse as the
200 process of determining a new default may call the caller!
201 Use get_current_source_symtab_and_line only to get whatever
202 we have without erroring out or trying to get a default. */
205 set_default_source_symtab_and_line (void)
207 if (!have_full_symbols () && !have_partial_symbols ())
208 error (_("No symbol table is loaded. Use the \"file\" command."));
210 /* Pull in a current source symtab if necessary. */
211 if (current_source_symtab
== 0)
212 select_source_symtab (0);
215 /* Return the current default file for listing and next line to list
216 (the returned sal pc and end fields are not valid.)
217 and set the current default to whatever is in SAL.
218 NOTE: The returned sal pc and end fields are not valid. */
220 struct symtab_and_line
221 set_current_source_symtab_and_line (const struct symtab_and_line
*sal
)
223 struct symtab_and_line cursal
= { 0 };
225 cursal
.pspace
= current_source_pspace
;
226 cursal
.symtab
= current_source_symtab
;
227 cursal
.line
= current_source_line
;
231 current_source_pspace
= sal
->pspace
;
232 current_source_symtab
= sal
->symtab
;
233 current_source_line
= sal
->line
;
235 /* Force the next "list" to center around the current line. */
236 clear_lines_listed_range ();
241 /* Reset any information stored about a default file and line to print. */
244 clear_current_source_symtab_and_line (void)
246 current_source_symtab
= 0;
247 current_source_line
= 0;
250 /* Set the source file default for the "list" command to be S.
252 If S is NULL, and we don't have a default, find one. This
253 should only be called when the user actually tries to use the
254 default, since we produce an error if we can't find a reasonable
255 default. Also, since this can cause symbols to be read, doing it
256 before we need to would make things slower than necessary. */
259 select_source_symtab (struct symtab
*s
)
261 struct symtabs_and_lines sals
;
262 struct symtab_and_line sal
;
264 struct compunit_symtab
*cu
;
268 current_source_symtab
= s
;
269 current_source_line
= 1;
270 current_source_pspace
= SYMTAB_PSPACE (s
);
274 if (current_source_symtab
)
277 /* Make the default place to list be the function `main'
279 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0).symbol
)
281 sals
= decode_line_with_current_source (main_name (),
282 DECODE_LINE_FUNFIRSTLINE
);
285 current_source_pspace
= sal
.pspace
;
286 current_source_symtab
= sal
.symtab
;
287 current_source_line
= std::max (sal
.line
- (lines_to_list
- 1), 1);
288 if (current_source_symtab
)
292 /* Alright; find the last file in the symtab list (ignoring .h's
293 and namespace symtabs). */
295 current_source_line
= 1;
297 ALL_FILETABS (ofp
, cu
, s
)
299 const char *name
= s
->filename
;
300 int len
= strlen (name
);
302 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
303 || strcmp (name
, "<<C++-namespaces>>") == 0)))
305 current_source_pspace
= current_program_space
;
306 current_source_symtab
= s
;
310 if (current_source_symtab
)
316 s
= ofp
->sf
->qf
->find_last_source_symtab (ofp
);
318 current_source_symtab
= s
;
320 if (current_source_symtab
)
323 error (_("Can't find a default source file"));
326 /* Handler for "set directories path-list" command.
327 "set dir mumble" doesn't prepend paths, it resets the entire
328 path list. The theory is that set(show(dir)) should be a no-op. */
331 set_directories_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
333 /* This is the value that was set.
334 It needs to be processed to maintain $cdir:$cwd and remove dups. */
335 char *set_path
= source_path
;
337 /* We preserve the invariant that $cdir:$cwd begins life at the end of
338 the list by calling init_source_path. If they appear earlier in
339 SET_PATH then mod_path will move them appropriately.
340 mod_path will also remove duplicates. */
342 if (*set_path
!= '\0')
343 mod_path (set_path
, &source_path
);
348 /* Print the list of source directories.
349 This is used by the "ld" command, so it has the signature of a command
353 show_directories_1 (char *ignore
, int from_tty
)
355 puts_filtered ("Source directories searched: ");
356 puts_filtered (source_path
);
357 puts_filtered ("\n");
360 /* Handler for "show directories" command. */
363 show_directories_command (struct ui_file
*file
, int from_tty
,
364 struct cmd_list_element
*c
, const char *value
)
366 show_directories_1 (NULL
, from_tty
);
369 /* Forget line positions and file names for the symtabs in a
370 particular objfile. */
373 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
375 struct compunit_symtab
*cu
;
378 ALL_OBJFILE_FILETABS (objfile
, cu
, s
)
380 if (s
->line_charpos
!= NULL
)
382 xfree (s
->line_charpos
);
383 s
->line_charpos
= NULL
;
385 if (s
->fullname
!= NULL
)
393 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
396 /* Forget what we learned about line positions in source files, and
397 which directories contain them; must check again now since files
398 may be found in a different directory now. */
401 forget_cached_source_info (void)
403 struct program_space
*pspace
;
404 struct objfile
*objfile
;
407 ALL_PSPACE_OBJFILES (pspace
, objfile
)
409 forget_cached_source_info_for_objfile (objfile
);
412 last_source_visited
= NULL
;
416 init_source_path (void)
420 xsnprintf (buf
, sizeof (buf
), "$cdir%c$cwd", DIRNAME_SEPARATOR
);
421 source_path
= xstrdup (buf
);
422 forget_cached_source_info ();
425 /* Add zero or more directories to the front of the source path. */
428 directory_command (char *dirname
, int from_tty
)
431 /* FIXME, this goes to "delete dir"... */
434 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
442 mod_path (dirname
, &source_path
);
443 forget_cached_source_info ();
446 show_directories_1 ((char *) 0, from_tty
);
449 /* Add a path given with the -d command line switch.
450 This will not be quoted so we must not treat spaces as separators. */
453 directory_switch (char *dirname
, int from_tty
)
455 add_path (dirname
, &source_path
, 0);
458 /* Add zero or more directories to the front of an arbitrary path. */
461 mod_path (char *dirname
, char **which_path
)
463 add_path (dirname
, which_path
, 1);
466 /* Workhorse of mod_path. Takes an extra argument to determine
467 if dirname should be parsed for separators that indicate multiple
468 directories. This allows for interfaces that pre-parse the dirname
469 and allow specification of traditional separator characters such
473 add_path (char *dirname
, char **which_path
, int parse_separators
)
475 char *old
= *which_path
;
477 VEC (char_ptr
) *dir_vec
= NULL
;
478 struct cleanup
*back_to
;
485 if (parse_separators
)
487 /* This will properly parse the space and tab separators
488 and any quotes that may exist. */
489 gdb_argv
argv (dirname
);
491 for (char *arg
: argv
)
492 dirnames_to_char_ptr_vec_append (&dir_vec
, arg
);
495 VEC_safe_push (char_ptr
, dir_vec
, xstrdup (dirname
));
496 back_to
= make_cleanup_free_char_ptr_vec (dir_vec
);
498 for (ix
= 0; VEC_iterate (char_ptr
, dir_vec
, ix
, name
); ++ix
)
503 /* Spaces and tabs will have been removed by buildargv().
504 NAME is the start of the directory.
505 P is the '\0' following the end. */
506 p
= name
+ strlen (name
);
508 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
509 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
510 /* On MS-DOS and MS-Windows, h:\ is different from h: */
511 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
513 && IS_DIR_SEPARATOR (p
[-1]))
514 /* Sigh. "foo/" => "foo" */
518 while (p
> name
&& p
[-1] == '.')
522 /* "." => getwd (). */
523 name
= current_directory
;
526 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
536 /* "...foo/." => "...foo". */
547 name
= tilde_expand (name
);
548 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
549 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
550 name
= concat (name
, ".", (char *)NULL
);
552 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
553 name
= concat (current_directory
, SLASH_STRING
, name
, (char *)NULL
);
555 name
= savestring (name
, p
- name
);
556 make_cleanup (xfree
, name
);
558 /* Unless it's a variable, check existence. */
561 /* These are warnings, not errors, since we don't want a
562 non-existent directory in a .gdbinit file to stop processing
563 of the .gdbinit file.
565 Whether they get added to the path is more debatable. Current
566 answer is yes, in case the user wants to go make the directory
567 or whatever. If the directory continues to not exist/not be
568 a directory/etc, then having them in the path should be
570 if (stat (name
, &st
) < 0)
572 int save_errno
= errno
;
574 fprintf_unfiltered (gdb_stderr
, "Warning: ");
575 print_sys_errmsg (name
, save_errno
);
577 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
578 warning (_("%s is not a directory."), name
);
583 unsigned int len
= strlen (name
);
589 /* FIXME: we should use realpath() or its work-alike
590 before comparing. Then all the code above which
591 removes excess slashes and dots could simply go away. */
592 if (!filename_ncmp (p
, name
, len
)
593 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
595 /* Found it in the search path, remove old copy. */
598 /* Back over leading separator. */
601 if (prefix
> p
- *which_path
)
603 /* Same dir twice in one cmd. */
606 /* Copy from next '\0' or ':'. */
607 memmove (p
, &p
[len
+ 1], strlen (&p
[len
+ 1]) + 1);
609 p
= strchr (p
, DIRNAME_SEPARATOR
);
616 tinybuf
[0] = DIRNAME_SEPARATOR
;
619 /* If we have already tacked on a name(s) in this command,
620 be sure they stay on the front as we tack on some
628 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
630 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
631 prefix
= strlen (temp
);
636 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
638 prefix
= strlen (name
);
647 do_cleanups (back_to
);
652 info_source_command (char *ignore
, int from_tty
)
654 struct symtab
*s
= current_source_symtab
;
655 struct compunit_symtab
*cust
;
659 printf_filtered (_("No current source file.\n"));
663 cust
= SYMTAB_COMPUNIT (s
);
664 printf_filtered (_("Current source file is %s\n"), s
->filename
);
665 if (SYMTAB_DIRNAME (s
) != NULL
)
666 printf_filtered (_("Compilation directory is %s\n"), SYMTAB_DIRNAME (s
));
668 printf_filtered (_("Located in %s\n"), s
->fullname
);
670 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
671 s
->nlines
== 1 ? "" : "s");
673 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
674 printf_filtered (_("Producer is %s.\n"),
675 COMPUNIT_PRODUCER (cust
) != NULL
676 ? COMPUNIT_PRODUCER (cust
) : _("unknown"));
677 printf_filtered (_("Compiled with %s debugging format.\n"),
678 COMPUNIT_DEBUGFORMAT (cust
));
679 printf_filtered (_("%s preprocessor macro info.\n"),
680 COMPUNIT_MACRO_TABLE (cust
) != NULL
681 ? "Includes" : "Does not include");
685 /* Return True if the file NAME exists and is a regular file.
686 If the result is false then *ERRNO_PTR is set to a useful value assuming
687 we're expecting a regular file. */
690 is_regular_file (const char *name
, int *errno_ptr
)
693 const int status
= stat (name
, &st
);
695 /* Stat should never fail except when the file does not exist.
696 If stat fails, analyze the source of error and return True
697 unless the file does not exist, to avoid returning false results
698 on obscure systems where stat does not work as expected. */
708 if (S_ISREG (st
.st_mode
))
711 if (S_ISDIR (st
.st_mode
))
718 /* Open a file named STRING, searching path PATH (dir names sep by some char)
719 using mode MODE in the calls to open. You cannot use this function to
720 create files (O_CREAT).
722 OPTS specifies the function behaviour in specific cases.
724 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
725 (ie pretend the first element of PATH is "."). This also indicates
726 that, unless OPF_SEARCH_IN_PATH is also specified, a slash in STRING
727 disables searching of the path (this is so that "exec-file ./foo" or
728 "symbol-file ./foo" insures that you get that particular version of
729 foo or an error message).
731 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
732 searched in path (we usually want this for source files but not for
735 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
736 the actual file opened (this string will always start with a "/"). We
737 have to take special pains to avoid doubling the "/" between the directory
738 and the file, sigh! Emacs gets confuzzed by this when we print the
741 If OPTS has OPF_RETURN_REALPATH set return FILENAME_OPENED resolved by
742 gdb_realpath. Even without OPF_RETURN_REALPATH this function still returns
743 filename starting with "/". If FILENAME_OPENED is NULL this option has no
746 If a file is found, return the descriptor.
747 Otherwise, return -1, with errno set for the last name we tried to open. */
749 /* >>>> This should only allow files of certain types,
750 >>>> eg executable, non-directory. */
752 openp (const char *path
, int opts
, const char *string
,
753 int mode
, char **filename_opened
)
758 VEC (char_ptr
) *dir_vec
;
759 struct cleanup
*back_to
;
762 /* The errno set for the last name we tried to open (and
766 /* The open syscall MODE parameter is not specified. */
767 gdb_assert ((mode
& O_CREAT
) == 0);
768 gdb_assert (string
!= NULL
);
770 /* A file with an empty name cannot possibly exist. Report a failure
771 without further checking.
773 This is an optimization which also defends us against buggy
774 implementations of the "stat" function. For instance, we have
775 noticed that a MinGW debugger built on Windows XP 32bits crashes
776 when the debugger is started with an empty argument. */
777 if (string
[0] == '\0')
788 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
790 int i
, reg_file_errno
;
792 if (is_regular_file (string
, ®_file_errno
))
794 filename
= (char *) alloca (strlen (string
) + 1);
795 strcpy (filename
, string
);
796 fd
= gdb_open_cloexec (filename
, mode
, 0);
805 last_errno
= reg_file_errno
;
808 if (!(opts
& OPF_SEARCH_IN_PATH
))
809 for (i
= 0; string
[i
]; i
++)
810 if (IS_DIR_SEPARATOR (string
[i
]))
814 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
815 if (HAS_DRIVE_SPEC (string
))
816 string
= STRIP_DRIVE_SPEC (string
);
818 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
819 while (IS_DIR_SEPARATOR(string
[0]))
823 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
826 alloclen
= strlen (path
) + strlen (string
) + 2;
827 filename
= (char *) alloca (alloclen
);
831 dir_vec
= dirnames_to_char_ptr_vec (path
);
832 back_to
= make_cleanup_free_char_ptr_vec (dir_vec
);
834 for (ix
= 0; VEC_iterate (char_ptr
, dir_vec
, ix
, dir
); ++ix
)
836 size_t len
= strlen (dir
);
839 if (strcmp (dir
, "$cwd") == 0)
841 /* Name is $cwd -- insert current directory name instead. */
844 /* First, realloc the filename buffer if too short. */
845 len
= strlen (current_directory
);
846 newlen
= len
+ strlen (string
) + 2;
847 if (newlen
> alloclen
)
850 filename
= (char *) alloca (alloclen
);
852 strcpy (filename
, current_directory
);
854 else if (strchr(dir
, '~'))
856 /* See whether we need to expand the tilde. */
859 gdb::unique_xmalloc_ptr
<char> tilde_expanded (tilde_expand (dir
));
861 /* First, realloc the filename buffer if too short. */
862 len
= strlen (tilde_expanded
.get ());
863 newlen
= len
+ strlen (string
) + 2;
864 if (newlen
> alloclen
)
867 filename
= (char *) alloca (alloclen
);
869 strcpy (filename
, tilde_expanded
.get ());
873 /* Normal file name in path -- just use it. */
874 strcpy (filename
, dir
);
876 /* Don't search $cdir. It's also a magic path like $cwd, but we
877 don't have enough information to expand it. The user *could*
878 have an actual directory named '$cdir' but handling that would
879 be confusing, it would mean different things in different
880 contexts. If the user really has '$cdir' one can use './$cdir'.
881 We can get $cdir when loading scripts. When loading source files
882 $cdir must have already been expanded to the correct value. */
883 if (strcmp (dir
, "$cdir") == 0)
887 /* Remove trailing slashes. */
888 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
891 strcat (filename
+ len
, SLASH_STRING
);
892 strcat (filename
, string
);
894 if (is_regular_file (filename
, ®_file_errno
))
896 fd
= gdb_open_cloexec (filename
, mode
, 0);
902 last_errno
= reg_file_errno
;
905 do_cleanups (back_to
);
910 /* If a file was opened, canonicalize its filename. */
912 *filename_opened
= NULL
;
913 else if ((opts
& OPF_RETURN_REALPATH
) != 0)
914 *filename_opened
= gdb_realpath (filename
).release ();
916 *filename_opened
= gdb_abspath (filename
).release ();
924 /* This is essentially a convenience, for clients that want the behaviour
925 of openp, using source_path, but that really don't want the file to be
926 opened but want instead just to know what the full pathname is (as
927 qualified against source_path).
929 The current working directory is searched first.
931 If the file was found, this function returns 1, and FULL_PATHNAME is
932 set to the fully-qualified pathname.
934 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
936 source_full_path_of (const char *filename
, char **full_pathname
)
940 fd
= openp (source_path
,
941 OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
,
942 filename
, O_RDONLY
, full_pathname
);
945 *full_pathname
= NULL
;
953 /* Return non-zero if RULE matches PATH, that is if the rule can be
957 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
960 const int from_len
= strlen (rule
->from
);
961 const int path_len
= strlen (path
);
963 if (path_len
< from_len
)
966 /* The substitution rules are anchored at the start of the path,
967 so the path should start with rule->from. */
969 if (filename_ncmp (path
, rule
->from
, from_len
) != 0)
972 /* Make sure that the region in the path that matches the substitution
973 rule is immediately followed by a directory separator (or the end of
974 string character). */
976 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
982 /* Find the substitute-path rule that applies to PATH and return it.
983 Return NULL if no rule applies. */
985 static struct substitute_path_rule
*
986 get_substitute_path_rule (const char *path
)
988 struct substitute_path_rule
*rule
= substitute_path_rules
;
990 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
996 /* If the user specified a source path substitution rule that applies
997 to PATH, then apply it and return the new path.
999 Return NULL if no substitution rule was specified by the user,
1000 or if no rule applied to the given PATH. */
1002 gdb::unique_xmalloc_ptr
<char>
1003 rewrite_source_path (const char *path
)
1005 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
1012 from_len
= strlen (rule
->from
);
1014 /* Compute the rewritten path and return it. */
1017 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
1018 strcpy (new_path
, rule
->to
);
1019 strcat (new_path
, path
+ from_len
);
1021 return gdb::unique_xmalloc_ptr
<char> (new_path
);
1025 find_and_open_source (const char *filename
,
1026 const char *dirname
,
1029 char *path
= source_path
;
1033 /* Quick way out if we already know its full name. */
1037 /* The user may have requested that source paths be rewritten
1038 according to substitution rules he provided. If a substitution
1039 rule applies to this path, then apply it. */
1040 char *rewritten_fullname
= rewrite_source_path (*fullname
).release ();
1042 if (rewritten_fullname
!= NULL
)
1045 *fullname
= rewritten_fullname
;
1048 result
= gdb_open_cloexec (*fullname
, OPEN_MODE
, 0);
1051 char *lpath
= gdb_realpath (*fullname
).release ();
1058 /* Didn't work -- free old one, try again. */
1063 gdb::unique_xmalloc_ptr
<char> rewritten_dirname
;
1064 if (dirname
!= NULL
)
1066 /* If necessary, rewrite the compilation directory name according
1067 to the source path substitution rules specified by the user. */
1069 rewritten_dirname
= rewrite_source_path (dirname
);
1071 if (rewritten_dirname
!= NULL
)
1072 dirname
= rewritten_dirname
.get ();
1074 /* Replace a path entry of $cdir with the compilation directory
1077 /* We cast strstr's result in case an ANSIhole has made it const,
1078 which produces a "required warning" when assigned to a nonconst. */
1079 p
= (char *) strstr (source_path
, "$cdir");
1080 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1081 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1086 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1087 len
= p
- source_path
;
1088 strncpy (path
, source_path
, len
); /* Before $cdir */
1089 strcpy (path
+ len
, dirname
); /* new stuff */
1090 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1095 gdb::unique_xmalloc_ptr
<char> rewritten_filename
;
1096 if (IS_ABSOLUTE_PATH (filename
))
1098 /* If filename is absolute path, try the source path
1099 substitution on it. */
1100 rewritten_filename
= rewrite_source_path (filename
);
1102 if (rewritten_filename
!= NULL
)
1103 filename
= rewritten_filename
.get ();
1106 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, filename
,
1107 OPEN_MODE
, fullname
);
1110 /* Didn't work. Try using just the basename. */
1111 p
= lbasename (filename
);
1113 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, p
,
1114 OPEN_MODE
, fullname
);
1120 /* Open a source file given a symtab S. Returns a file descriptor or
1121 negative number for error.
1123 This function is a convience function to find_and_open_source. */
1126 open_source_file (struct symtab
*s
)
1131 return find_and_open_source (s
->filename
, SYMTAB_DIRNAME (s
), &s
->fullname
);
1134 /* Finds the fullname that a symtab represents.
1136 This functions finds the fullname and saves it in s->fullname.
1137 It will also return the value.
1139 If this function fails to find the file that this symtab represents,
1140 the expected fullname is used. Therefore the files does not have to
1144 symtab_to_fullname (struct symtab
*s
)
1146 /* Use cached copy if we have it.
1147 We rely on forget_cached_source_info being called appropriately
1148 to handle cases like the file being moved. */
1149 if (s
->fullname
== NULL
)
1151 int fd
= find_and_open_source (s
->filename
, SYMTAB_DIRNAME (s
),
1158 gdb::unique_xmalloc_ptr
<char> fullname
;
1160 /* rewrite_source_path would be applied by find_and_open_source, we
1161 should report the pathname where GDB tried to find the file. */
1163 if (SYMTAB_DIRNAME (s
) == NULL
|| IS_ABSOLUTE_PATH (s
->filename
))
1164 fullname
.reset (xstrdup (s
->filename
));
1166 fullname
.reset (concat (SYMTAB_DIRNAME (s
), SLASH_STRING
,
1167 s
->filename
, (char *) NULL
));
1169 s
->fullname
= rewrite_source_path (fullname
.get ()).release ();
1170 if (s
->fullname
== NULL
)
1171 s
->fullname
= fullname
.release ();
1178 /* See commentary in source.h. */
1181 symtab_to_filename_for_display (struct symtab
*symtab
)
1183 if (filename_display_string
== filename_display_basename
)
1184 return lbasename (symtab
->filename
);
1185 else if (filename_display_string
== filename_display_absolute
)
1186 return symtab_to_fullname (symtab
);
1187 else if (filename_display_string
== filename_display_relative
)
1188 return symtab
->filename
;
1190 internal_error (__FILE__
, __LINE__
, _("invalid filename_display_string"));
1193 /* Create and initialize the table S->line_charpos that records
1194 the positions of the lines in the source file, which is assumed
1195 to be open on descriptor DESC.
1196 All set S->nlines to the number of such lines. */
1199 find_source_lines (struct symtab
*s
, int desc
)
1202 char *data
, *p
, *end
;
1204 int lines_allocated
= 1000;
1210 line_charpos
= XNEWVEC (int, lines_allocated
);
1211 if (fstat (desc
, &st
) < 0)
1212 perror_with_name (symtab_to_filename_for_display (s
));
1214 if (SYMTAB_OBJFILE (s
) != NULL
&& SYMTAB_OBJFILE (s
)->obfd
!= NULL
)
1215 mtime
= SYMTAB_OBJFILE (s
)->mtime
;
1217 mtime
= exec_bfd_mtime
;
1219 if (mtime
&& mtime
< st
.st_mtime
)
1220 warning (_("Source file is more recent than executable."));
1223 struct cleanup
*old_cleanups
;
1225 /* st_size might be a large type, but we only support source files whose
1226 size fits in an int. */
1227 size
= (int) st
.st_size
;
1229 /* Use malloc, not alloca, because this may be pretty large, and we may
1230 run into various kinds of limits on stack size. */
1231 data
= (char *) xmalloc (size
);
1232 old_cleanups
= make_cleanup (xfree
, data
);
1234 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1235 size
= myread (desc
, data
, size
);
1237 perror_with_name (symtab_to_filename_for_display (s
));
1240 line_charpos
[0] = 0;
1245 /* A newline at the end does not start a new line. */
1248 if (nlines
== lines_allocated
)
1250 lines_allocated
*= 2;
1252 (int *) xrealloc ((char *) line_charpos
,
1253 sizeof (int) * lines_allocated
);
1255 line_charpos
[nlines
++] = p
- data
;
1258 do_cleanups (old_cleanups
);
1263 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1269 /* Get full pathname and line number positions for a symtab.
1270 Return nonzero if line numbers may have changed.
1271 Set *FULLNAME to actual name of the file as found by `openp',
1272 or to 0 if the file is not found. */
1275 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1277 int desc
, linenums_changed
= 0;
1278 struct cleanup
*cleanups
;
1280 desc
= open_source_file (s
);
1287 cleanups
= make_cleanup_close (desc
);
1289 *fullname
= s
->fullname
;
1290 if (s
->line_charpos
== 0)
1291 linenums_changed
= 1;
1292 if (linenums_changed
)
1293 find_source_lines (s
, desc
);
1294 do_cleanups (cleanups
);
1295 return linenums_changed
;
1298 /* Print text describing the full name of the source file S
1299 and the line number LINE and its corresponding character position.
1300 The text starts with two Ctrl-z so that the Emacs-GDB interface
1303 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1305 Return 1 if successful, 0 if could not find the file. */
1308 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1311 if (s
->line_charpos
== 0)
1312 get_filename_and_charpos (s
, (char **) NULL
);
1313 if (s
->fullname
== 0)
1315 if (line
> s
->nlines
)
1316 /* Don't index off the end of the line_charpos array. */
1318 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1319 mid_statement
, get_objfile_arch (SYMTAB_OBJFILE (s
)), pc
);
1321 current_source_line
= line
;
1322 current_source_symtab
= s
;
1323 clear_lines_listed_range ();
1328 /* Print source lines from the file of symtab S,
1329 starting with line number LINE and stopping before line number STOPLINE. */
1332 print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1333 print_source_lines_flags flags
)
1338 int nlines
= stopline
- line
;
1339 struct ui_out
*uiout
= current_uiout
;
1341 /* Regardless of whether we can open the file, set current_source_symtab. */
1342 current_source_symtab
= s
;
1343 current_source_line
= line
;
1344 first_line_listed
= line
;
1346 /* If printing of source lines is disabled, just print file and line
1348 if (uiout
->test_flags (ui_source_list
))
1350 /* Only prints "No such file or directory" once. */
1351 if ((s
!= last_source_visited
) || (!last_source_error
))
1353 last_source_visited
= s
;
1354 desc
= open_source_file (s
);
1358 desc
= last_source_error
;
1359 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1364 desc
= last_source_error
;
1365 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1369 if (desc
< 0 || noprint
)
1371 last_source_error
= desc
;
1373 if (!(flags
& PRINT_SOURCE_LINES_NOERROR
))
1375 const char *filename
= symtab_to_filename_for_display (s
);
1376 int len
= strlen (filename
) + 100;
1377 char *name
= (char *) alloca (len
);
1379 xsnprintf (name
, len
, "%d\t%s", line
, filename
);
1380 print_sys_errmsg (name
, errno
);
1384 uiout
->field_int ("line", line
);
1385 uiout
->text ("\tin ");
1387 /* CLI expects only the "file" field. TUI expects only the
1388 "fullname" field (and TUI does break if "file" is printed).
1389 MI expects both fields. ui_source_list is set only for CLI,
1391 if (uiout
->is_mi_like_p () || uiout
->test_flags (ui_source_list
))
1392 uiout
->field_string ("file", symtab_to_filename_for_display (s
));
1393 if (uiout
->is_mi_like_p () || !uiout
->test_flags (ui_source_list
))
1395 const char *s_fullname
= symtab_to_fullname (s
);
1396 char *local_fullname
;
1398 /* ui_out_field_string may free S_FULLNAME by calling
1399 open_source_file for it again. See e.g.,
1400 tui_field_string->tui_show_source. */
1401 local_fullname
= (char *) alloca (strlen (s_fullname
) + 1);
1402 strcpy (local_fullname
, s_fullname
);
1404 uiout
->field_string ("fullname", local_fullname
);
1413 last_source_error
= 0;
1415 if (s
->line_charpos
== 0)
1416 find_source_lines (s
, desc
);
1418 if (line
< 1 || line
> s
->nlines
)
1421 error (_("Line number %d out of range; %s has %d lines."),
1422 line
, symtab_to_filename_for_display (s
), s
->nlines
);
1425 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1428 perror_with_name (symtab_to_filename_for_display (s
));
1431 gdb_file_up
stream (fdopen (desc
, FDOPEN_MODE
));
1432 clearerr (stream
.get ());
1434 while (nlines
-- > 0)
1438 c
= fgetc (stream
.get ());
1441 last_line_listed
= current_source_line
;
1442 if (flags
& PRINT_SOURCE_LINES_FILENAME
)
1444 uiout
->text (symtab_to_filename_for_display (s
));
1447 xsnprintf (buf
, sizeof (buf
), "%d\t", current_source_line
++);
1451 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1453 xsnprintf (buf
, sizeof (buf
), "^%c", c
+ 0100);
1460 /* Skip a \r character, but only before a \n. */
1461 int c1
= fgetc (stream
.get ());
1464 printf_filtered ("^%c", c
+ 0100);
1466 ungetc (c1
, stream
.get ());
1470 xsnprintf (buf
, sizeof (buf
), "%c", c
);
1474 while (c
!= '\n' && (c
= fgetc (stream
.get ())) >= 0);
1478 /* Show source lines from the file of symtab S, starting with line
1479 number LINE and stopping before line number STOPLINE. If this is
1480 not the command line version, then the source is shown in the source
1481 window otherwise it is simply printed. */
1484 print_source_lines (struct symtab
*s
, int line
, int stopline
,
1485 print_source_lines_flags flags
)
1487 print_source_lines_base (s
, line
, stopline
, flags
);
1490 /* Print info on range of pc's in a specified line. */
1493 info_line_command (char *arg
, int from_tty
)
1495 struct symtabs_and_lines sals
;
1496 struct symtab_and_line sal
;
1497 CORE_ADDR start_pc
, end_pc
;
1499 struct cleanup
*cleanups
;
1501 init_sal (&sal
); /* initialize to zeroes */
1505 sal
.symtab
= current_source_symtab
;
1506 sal
.pspace
= current_program_space
;
1507 if (last_line_listed
!= 0)
1508 sal
.line
= last_line_listed
;
1510 sal
.line
= current_source_line
;
1513 sals
.sals
= XNEW (struct symtab_and_line
);
1518 sals
= decode_line_with_last_displayed (arg
, DECODE_LINE_LIST_MODE
);
1523 cleanups
= make_cleanup (xfree
, sals
.sals
);
1525 /* C++ More than one line may have been specified, as when the user
1526 specifies an overloaded function name. Print info on them all. */
1527 for (i
= 0; i
< sals
.nelts
; i
++)
1530 if (sal
.pspace
!= current_program_space
)
1533 if (sal
.symtab
== 0)
1535 struct gdbarch
*gdbarch
= get_current_arch ();
1537 printf_filtered (_("No line number information available"));
1540 /* This is useful for "info line *0x7f34". If we can't tell the
1541 user about a source line, at least let them have the symbolic
1543 printf_filtered (" for address ");
1545 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1548 printf_filtered (".");
1549 printf_filtered ("\n");
1551 else if (sal
.line
> 0
1552 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1554 struct gdbarch
*gdbarch
1555 = get_objfile_arch (SYMTAB_OBJFILE (sal
.symtab
));
1557 if (start_pc
== end_pc
)
1559 printf_filtered ("Line %d of \"%s\"",
1561 symtab_to_filename_for_display (sal
.symtab
));
1563 printf_filtered (" is at address ");
1564 print_address (gdbarch
, start_pc
, gdb_stdout
);
1566 printf_filtered (" but contains no code.\n");
1570 printf_filtered ("Line %d of \"%s\"",
1572 symtab_to_filename_for_display (sal
.symtab
));
1574 printf_filtered (" starts at address ");
1575 print_address (gdbarch
, start_pc
, gdb_stdout
);
1577 printf_filtered (" and ends at ");
1578 print_address (gdbarch
, end_pc
, gdb_stdout
);
1579 printf_filtered (".\n");
1582 /* x/i should display this line's code. */
1583 set_next_address (gdbarch
, start_pc
);
1585 /* Repeating "info line" should do the following line. */
1586 last_line_listed
= sal
.line
+ 1;
1588 /* If this is the only line, show the source code. If it could
1589 not find the file, don't do anything special. */
1590 if (annotation_level
&& sals
.nelts
== 1)
1591 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1594 /* Is there any case in which we get here, and have an address
1595 which the user would want to see? If we have debugging symbols
1596 and no line numbers? */
1597 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1598 sal
.line
, symtab_to_filename_for_display (sal
.symtab
));
1600 do_cleanups (cleanups
);
1603 /* Commands to search the source file for a regexp. */
1606 forward_search_command (char *regex
, int from_tty
)
1612 struct cleanup
*cleanups
;
1614 line
= last_line_listed
+ 1;
1616 msg
= (char *) re_comp (regex
);
1618 error (("%s"), msg
);
1620 if (current_source_symtab
== 0)
1621 select_source_symtab (0);
1623 desc
= open_source_file (current_source_symtab
);
1625 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1626 cleanups
= make_cleanup_close (desc
);
1628 if (current_source_symtab
->line_charpos
== 0)
1629 find_source_lines (current_source_symtab
, desc
);
1631 if (line
< 1 || line
> current_source_symtab
->nlines
)
1632 error (_("Expression not found"));
1634 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1635 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1637 discard_cleanups (cleanups
);
1638 gdb_file_up
stream (fdopen (desc
, FDOPEN_MODE
));
1639 clearerr (stream
.get ());
1642 static char *buf
= NULL
;
1644 int cursize
, newsize
;
1647 buf
= (char *) xmalloc (cursize
);
1650 c
= fgetc (stream
.get ());
1656 if (p
- buf
== cursize
)
1658 newsize
= cursize
+ cursize
/ 2;
1659 buf
= (char *) xrealloc (buf
, newsize
);
1664 while (c
!= '\n' && (c
= fgetc (stream
.get ())) >= 0);
1666 /* Remove the \r, if any, at the end of the line, otherwise
1667 regular expressions that end with $ or \n won't work. */
1668 if (p
- buf
> 1 && p
[-2] == '\r')
1674 /* We now have a source line in buf, null terminate and match. */
1676 if (re_exec (buf
) > 0)
1679 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1680 set_internalvar_integer (lookup_internalvar ("_"), line
);
1681 current_source_line
= std::max (line
- lines_to_list
/ 2, 1);
1687 printf_filtered (_("Expression not found\n"));
1691 reverse_search_command (char *regex
, int from_tty
)
1697 struct cleanup
*cleanups
;
1699 line
= last_line_listed
- 1;
1701 msg
= (char *) re_comp (regex
);
1703 error (("%s"), msg
);
1705 if (current_source_symtab
== 0)
1706 select_source_symtab (0);
1708 desc
= open_source_file (current_source_symtab
);
1710 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1711 cleanups
= make_cleanup_close (desc
);
1713 if (current_source_symtab
->line_charpos
== 0)
1714 find_source_lines (current_source_symtab
, desc
);
1716 if (line
< 1 || line
> current_source_symtab
->nlines
)
1717 error (_("Expression not found"));
1719 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1720 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1722 discard_cleanups (cleanups
);
1723 gdb_file_up
stream (fdopen (desc
, FDOPEN_MODE
));
1724 clearerr (stream
.get ());
1727 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1728 char buf
[4096]; /* Should be reasonable??? */
1731 c
= fgetc (stream
.get ());
1738 while (c
!= '\n' && (c
= fgetc (stream
.get ())) >= 0);
1740 /* Remove the \r, if any, at the end of the line, otherwise
1741 regular expressions that end with $ or \n won't work. */
1742 if (p
- buf
> 1 && p
[-2] == '\r')
1748 /* We now have a source line in buf; null terminate and match. */
1750 if (re_exec (buf
) > 0)
1753 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1754 set_internalvar_integer (lookup_internalvar ("_"), line
);
1755 current_source_line
= std::max (line
- lines_to_list
/ 2, 1);
1759 if (fseek (stream
.get (),
1760 current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1762 const char *filename
;
1764 filename
= symtab_to_filename_for_display (current_source_symtab
);
1765 perror_with_name (filename
);
1769 printf_filtered (_("Expression not found\n"));
1773 /* If the last character of PATH is a directory separator, then strip it. */
1776 strip_trailing_directory_separator (char *path
)
1778 const int last
= strlen (path
) - 1;
1781 return; /* No stripping is needed if PATH is the empty string. */
1783 if (IS_DIR_SEPARATOR (path
[last
]))
1787 /* Return the path substitution rule that matches FROM.
1788 Return NULL if no rule matches. */
1790 static struct substitute_path_rule
*
1791 find_substitute_path_rule (const char *from
)
1793 struct substitute_path_rule
*rule
= substitute_path_rules
;
1795 while (rule
!= NULL
)
1797 if (FILENAME_CMP (rule
->from
, from
) == 0)
1805 /* Add a new substitute-path rule at the end of the current list of rules.
1806 The new rule will replace FROM into TO. */
1809 add_substitute_path_rule (char *from
, char *to
)
1811 struct substitute_path_rule
*rule
;
1812 struct substitute_path_rule
*new_rule
= XNEW (struct substitute_path_rule
);
1814 new_rule
->from
= xstrdup (from
);
1815 new_rule
->to
= xstrdup (to
);
1816 new_rule
->next
= NULL
;
1818 /* If the list of rules are empty, then insert the new rule
1819 at the head of the list. */
1821 if (substitute_path_rules
== NULL
)
1823 substitute_path_rules
= new_rule
;
1827 /* Otherwise, skip to the last rule in our list and then append
1830 rule
= substitute_path_rules
;
1831 while (rule
->next
!= NULL
)
1834 rule
->next
= new_rule
;
1837 /* Remove the given source path substitution rule from the current list
1838 of rules. The memory allocated for that rule is also deallocated. */
1841 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1843 if (rule
== substitute_path_rules
)
1844 substitute_path_rules
= rule
->next
;
1847 struct substitute_path_rule
*prev
= substitute_path_rules
;
1849 while (prev
!= NULL
&& prev
->next
!= rule
)
1852 gdb_assert (prev
!= NULL
);
1854 prev
->next
= rule
->next
;
1862 /* Implement the "show substitute-path" command. */
1865 show_substitute_path_command (char *args
, int from_tty
)
1867 struct substitute_path_rule
*rule
= substitute_path_rules
;
1870 gdb_argv
argv (args
);
1872 /* We expect zero or one argument. */
1874 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1875 error (_("Too many arguments in command"));
1877 if (argv
!= NULL
&& argv
[0] != NULL
)
1880 /* Print the substitution rules. */
1884 (_("Source path substitution rule matching `%s':\n"), from
);
1886 printf_filtered (_("List of all source path substitution rules:\n"));
1888 while (rule
!= NULL
)
1890 if (from
== NULL
|| substitute_path_rule_matches (rule
, from
) != 0)
1891 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1896 /* Implement the "unset substitute-path" command. */
1899 unset_substitute_path_command (char *args
, int from_tty
)
1901 struct substitute_path_rule
*rule
= substitute_path_rules
;
1902 gdb_argv
argv (args
);
1906 /* This function takes either 0 or 1 argument. */
1908 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1909 error (_("Incorrect usage, too many arguments in command"));
1911 if (argv
!= NULL
&& argv
[0] != NULL
)
1914 /* If the user asked for all the rules to be deleted, ask him
1915 to confirm and give him a chance to abort before the action
1919 && !query (_("Delete all source path substitution rules? ")))
1920 error (_("Canceled"));
1922 /* Delete the rule matching the argument. No argument means that
1923 all rules should be deleted. */
1925 while (rule
!= NULL
)
1927 struct substitute_path_rule
*next
= rule
->next
;
1929 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1931 delete_substitute_path_rule (rule
);
1938 /* If the user asked for a specific rule to be deleted but
1939 we could not find it, then report an error. */
1941 if (from
!= NULL
&& !rule_found
)
1942 error (_("No substitution rule defined for `%s'"), from
);
1944 forget_cached_source_info ();
1947 /* Add a new source path substitution rule. */
1950 set_substitute_path_command (char *args
, int from_tty
)
1952 struct substitute_path_rule
*rule
;
1954 gdb_argv
argv (args
);
1956 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1957 error (_("Incorrect usage, too few arguments in command"));
1959 if (argv
[2] != NULL
)
1960 error (_("Incorrect usage, too many arguments in command"));
1962 if (*(argv
[0]) == '\0')
1963 error (_("First argument must be at least one character long"));
1965 /* Strip any trailing directory separator character in either FROM
1966 or TO. The substitution rule already implicitly contains them. */
1967 strip_trailing_directory_separator (argv
[0]);
1968 strip_trailing_directory_separator (argv
[1]);
1970 /* If a rule with the same "from" was previously defined, then
1971 delete it. This new rule replaces it. */
1973 rule
= find_substitute_path_rule (argv
[0]);
1975 delete_substitute_path_rule (rule
);
1977 /* Insert the new substitution rule. */
1979 add_substitute_path_rule (argv
[0], argv
[1]);
1980 forget_cached_source_info ();
1985 _initialize_source (void)
1987 struct cmd_list_element
*c
;
1989 current_source_symtab
= 0;
1990 init_source_path ();
1992 /* The intention is to use POSIX Basic Regular Expressions.
1993 Always use the GNU regex routine for consistency across all hosts.
1994 Our current GNU regex.c does not have all the POSIX features, so this is
1995 just an approximation. */
1996 re_set_syntax (RE_SYNTAX_GREP
);
1998 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1999 Add directory DIR to beginning of search path for source files.\n\
2000 Forget cached info on source file locations and line positions.\n\
2001 DIR can also be $cwd for the current working directory, or $cdir for the\n\
2002 directory in which the source file was compiled into object code.\n\
2003 With no argument, reset the search path to $cdir:$cwd, the default."),
2007 add_com_alias ("use", "directory", class_files
, 0);
2009 set_cmd_completer (c
, filename_completer
);
2011 add_setshow_optional_filename_cmd ("directories",
2015 Set the search path for finding source files."),
2017 Show the search path for finding source files."),
2019 $cwd in the path means the current working directory.\n\
2020 $cdir in the path means the compilation directory of the source file.\n\
2021 GDB ensures the search path always ends with $cdir:$cwd by\n\
2022 appending these directories if necessary.\n\
2023 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
2024 set_directories_command
,
2025 show_directories_command
,
2026 &setlist
, &showlist
);
2028 add_info ("source", info_source_command
,
2029 _("Information about the current source file."));
2031 add_info ("line", info_line_command
, _("\
2032 Core addresses of the code for a source line.\n\
2033 Line can be specified as\n\
2034 LINENUM, to list around that line in current file,\n\
2035 FILE:LINENUM, to list around that line in that file,\n\
2036 FUNCTION, to list around beginning of that function,\n\
2037 FILE:FUNCTION, to distinguish among like-named static functions.\n\
2038 Default is to describe the last source line that was listed.\n\n\
2039 This sets the default address for \"x\" to the line's first instruction\n\
2040 so that \"x/i\" suffices to start examining the machine code.\n\
2041 The address is also stored as the value of \"$_\"."));
2043 add_com ("forward-search", class_files
, forward_search_command
, _("\
2044 Search for regular expression (see regex(3)) from last line listed.\n\
2045 The matching line number is also stored as the value of \"$_\"."));
2046 add_com_alias ("search", "forward-search", class_files
, 0);
2047 add_com_alias ("fo", "forward-search", class_files
, 1);
2049 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
2050 Search backward for regular expression (see regex(3)) from last line listed.\n\
2051 The matching line number is also stored as the value of \"$_\"."));
2052 add_com_alias ("rev", "reverse-search", class_files
, 1);
2054 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
2055 Set number of source lines gdb will list by default."), _("\
2056 Show number of source lines gdb will list by default."), _("\
2057 Use this to choose how many source lines the \"list\" displays (unless\n\
2058 the \"list\" argument explicitly specifies some other number).\n\
2059 A value of \"unlimited\", or zero, means there's no limit."),
2062 &setlist
, &showlist
);
2064 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
2066 Usage: set substitute-path FROM TO\n\
2067 Add a substitution rule replacing FROM into TO in source file names.\n\
2068 If a substitution rule was previously set for FROM, the old rule\n\
2069 is replaced by the new one."),
2072 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
2074 Usage: unset substitute-path [FROM]\n\
2075 Delete the rule for substituting FROM in source file names. If FROM\n\
2076 is not specified, all substituting rules are deleted.\n\
2077 If the debugger cannot find a rule for FROM, it will display a warning."),
2080 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
2082 Usage: show substitute-path [FROM]\n\
2083 Print the rule for substituting FROM in source file names. If FROM\n\
2084 is not specified, print all substitution rules."),
2087 add_setshow_enum_cmd ("filename-display", class_files
,
2088 filename_display_kind_names
,
2089 &filename_display_string
, _("\
2090 Set how to display filenames."), _("\
2091 Show how to display filenames."), _("\
2092 filename-display can be:\n\
2093 basename - display only basename of a filename\n\
2094 relative - display a filename relative to the compilation directory\n\
2095 absolute - display an absolute filename\n\
2096 By default, relative filenames are displayed."),
2098 show_filename_display_string
,
2099 &setlist
, &showlist
);