1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1986-2019 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>
34 #include "gdb_regex.h"
40 #include "filenames.h" /* for DOSish file names */
41 #include "completer.h"
43 #include "readline/readline.h"
44 #include "common/enum-flags.h"
45 #include "common/scoped_fd.h"
47 #include "common/pathstuff.h"
48 #include "source-cache.h"
50 #define OPEN_MODE (O_RDONLY | O_BINARY)
51 #define FDOPEN_MODE FOPEN_RB
53 /* Path of directories to search for source files.
54 Same format as the PATH environment variable's value. */
58 /* Support for source path substitution commands. */
60 struct substitute_path_rule
64 struct substitute_path_rule
*next
;
67 static struct substitute_path_rule
*substitute_path_rules
= NULL
;
69 /* Symtab of default file for listing lines of. */
71 static struct symtab
*current_source_symtab
;
73 /* Default next line to list. */
75 static int current_source_line
;
77 static struct program_space
*current_source_pspace
;
79 /* Default number of lines to print with commands like "list".
80 This is based on guessing how many long (i.e. more than chars_per_line
81 characters) lines there will be. To be completely correct, "list"
82 and friends should be rewritten to count characters and see where
83 things are wrapping, but that would be a fair amount of work. */
85 static int lines_to_list
= 10;
87 show_lines_to_list (struct ui_file
*file
, int from_tty
,
88 struct cmd_list_element
*c
, const char *value
)
90 fprintf_filtered (file
,
91 _("Number of source lines gdb "
92 "will list by default is %s.\n"),
96 /* Possible values of 'set filename-display'. */
97 static const char filename_display_basename
[] = "basename";
98 static const char filename_display_relative
[] = "relative";
99 static const char filename_display_absolute
[] = "absolute";
101 static const char *const filename_display_kind_names
[] = {
102 filename_display_basename
,
103 filename_display_relative
,
104 filename_display_absolute
,
108 static const char *filename_display_string
= filename_display_relative
;
111 show_filename_display_string (struct ui_file
*file
, int from_tty
,
112 struct cmd_list_element
*c
, const char *value
)
114 fprintf_filtered (file
, _("Filenames are displayed as \"%s\".\n"), value
);
117 /* Line number of last line printed. Default for various commands.
118 current_source_line is usually, but not always, the same as this. */
120 static int last_line_listed
;
122 /* First line number listed by last listing command. If 0, then no
123 source lines have yet been listed since the last time the current
124 source line was changed. */
126 static int first_line_listed
;
128 /* Saves the name of the last source file visited and a possible error code.
129 Used to prevent repeating annoying "No such file or directories" msgs. */
131 static struct symtab
*last_source_visited
= NULL
;
132 static int last_source_error
= 0;
134 /* Return the first line listed by print_source_lines.
135 Used by command interpreters to request listing from
139 get_first_line_listed (void)
141 return first_line_listed
;
144 /* Clear line listed range. This makes the next "list" center the
145 printed source lines around the current source line. */
148 clear_lines_listed_range (void)
150 first_line_listed
= 0;
151 last_line_listed
= 0;
154 /* Return the default number of lines to print with commands like the
155 cli "list". The caller of print_source_lines must use this to
156 calculate the end line and use it in the call to print_source_lines
157 as it does not automatically use this value. */
160 get_lines_to_list (void)
162 return lines_to_list
;
165 /* Return the current source file for listing and next line to list.
166 NOTE: The returned sal pc and end fields are not valid. */
168 struct symtab_and_line
169 get_current_source_symtab_and_line (void)
171 symtab_and_line cursal
;
173 cursal
.pspace
= current_source_pspace
;
174 cursal
.symtab
= current_source_symtab
;
175 cursal
.line
= current_source_line
;
182 /* If the current source file for listing is not set, try and get a default.
183 Usually called before get_current_source_symtab_and_line() is called.
184 It may err out if a default cannot be determined.
185 We must be cautious about where it is called, as it can recurse as the
186 process of determining a new default may call the caller!
187 Use get_current_source_symtab_and_line only to get whatever
188 we have without erroring out or trying to get a default. */
191 set_default_source_symtab_and_line (void)
193 if (!have_full_symbols () && !have_partial_symbols ())
194 error (_("No symbol table is loaded. Use the \"file\" command."));
196 /* Pull in a current source symtab if necessary. */
197 if (current_source_symtab
== 0)
198 select_source_symtab (0);
201 /* Return the current default file for listing and next line to list
202 (the returned sal pc and end fields are not valid.)
203 and set the current default to whatever is in SAL.
204 NOTE: The returned sal pc and end fields are not valid. */
206 struct symtab_and_line
207 set_current_source_symtab_and_line (const symtab_and_line
&sal
)
209 symtab_and_line cursal
;
211 cursal
.pspace
= current_source_pspace
;
212 cursal
.symtab
= current_source_symtab
;
213 cursal
.line
= current_source_line
;
217 current_source_pspace
= sal
.pspace
;
218 current_source_symtab
= sal
.symtab
;
219 current_source_line
= sal
.line
;
221 /* Force the next "list" to center around the current line. */
222 clear_lines_listed_range ();
227 /* Reset any information stored about a default file and line to print. */
230 clear_current_source_symtab_and_line (void)
232 current_source_symtab
= 0;
233 current_source_line
= 0;
239 select_source_symtab (struct symtab
*s
)
242 struct compunit_symtab
*cu
;
246 current_source_symtab
= s
;
247 current_source_line
= 1;
248 current_source_pspace
= SYMTAB_PSPACE (s
);
252 if (current_source_symtab
)
255 /* Make the default place to list be the function `main'
257 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0).symbol
)
259 std::vector
<symtab_and_line
> sals
260 = decode_line_with_current_source (main_name (),
261 DECODE_LINE_FUNFIRSTLINE
);
262 const symtab_and_line
&sal
= sals
[0];
263 current_source_pspace
= sal
.pspace
;
264 current_source_symtab
= sal
.symtab
;
265 current_source_line
= std::max (sal
.line
- (lines_to_list
- 1), 1);
266 if (current_source_symtab
)
270 /* Alright; find the last file in the symtab list (ignoring .h's
271 and namespace symtabs). */
273 current_source_line
= 1;
275 ALL_FILETABS (ofp
, cu
, s
)
277 const char *name
= s
->filename
;
278 int len
= strlen (name
);
280 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
281 || strcmp (name
, "<<C++-namespaces>>") == 0)))
283 current_source_pspace
= current_program_space
;
284 current_source_symtab
= s
;
288 if (current_source_symtab
)
291 for (objfile
*objfile
: all_objfiles (current_program_space
))
294 s
= objfile
->sf
->qf
->find_last_source_symtab (objfile
);
296 current_source_symtab
= s
;
298 if (current_source_symtab
)
301 error (_("Can't find a default source file"));
304 /* Handler for "set directories path-list" command.
305 "set dir mumble" doesn't prepend paths, it resets the entire
306 path list. The theory is that set(show(dir)) should be a no-op. */
309 set_directories_command (const char *args
,
310 int from_tty
, struct cmd_list_element
*c
)
312 /* This is the value that was set.
313 It needs to be processed to maintain $cdir:$cwd and remove dups. */
314 char *set_path
= source_path
;
316 /* We preserve the invariant that $cdir:$cwd begins life at the end of
317 the list by calling init_source_path. If they appear earlier in
318 SET_PATH then mod_path will move them appropriately.
319 mod_path will also remove duplicates. */
321 if (*set_path
!= '\0')
322 mod_path (set_path
, &source_path
);
327 /* Print the list of source directories.
328 This is used by the "ld" command, so it has the signature of a command
332 show_directories_1 (char *ignore
, int from_tty
)
334 puts_filtered ("Source directories searched: ");
335 puts_filtered (source_path
);
336 puts_filtered ("\n");
339 /* Handler for "show directories" command. */
342 show_directories_command (struct ui_file
*file
, int from_tty
,
343 struct cmd_list_element
*c
, const char *value
)
345 show_directories_1 (NULL
, from_tty
);
351 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
353 struct compunit_symtab
*cu
;
356 ALL_OBJFILE_FILETABS (objfile
, cu
, s
)
358 if (s
->line_charpos
!= NULL
)
360 xfree (s
->line_charpos
);
361 s
->line_charpos
= NULL
;
363 if (s
->fullname
!= NULL
)
371 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
377 forget_cached_source_info (void)
379 struct program_space
*pspace
;
382 for (objfile
*objfile
: all_objfiles (pspace
))
384 forget_cached_source_info_for_objfile (objfile
);
387 g_source_cache
.clear ();
388 last_source_visited
= NULL
;
392 init_source_path (void)
396 xsnprintf (buf
, sizeof (buf
), "$cdir%c$cwd", DIRNAME_SEPARATOR
);
397 source_path
= xstrdup (buf
);
398 forget_cached_source_info ();
401 /* Add zero or more directories to the front of the source path. */
404 directory_command (const char *dirname
, int from_tty
)
407 /* FIXME, this goes to "delete dir"... */
410 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
418 mod_path (dirname
, &source_path
);
419 forget_cached_source_info ();
422 show_directories_1 ((char *) 0, from_tty
);
425 /* Add a path given with the -d command line switch.
426 This will not be quoted so we must not treat spaces as separators. */
429 directory_switch (const char *dirname
, int from_tty
)
431 add_path (dirname
, &source_path
, 0);
434 /* Add zero or more directories to the front of an arbitrary path. */
437 mod_path (const char *dirname
, char **which_path
)
439 add_path (dirname
, which_path
, 1);
442 /* Workhorse of mod_path. Takes an extra argument to determine
443 if dirname should be parsed for separators that indicate multiple
444 directories. This allows for interfaces that pre-parse the dirname
445 and allow specification of traditional separator characters such
449 add_path (const char *dirname
, char **which_path
, int parse_separators
)
451 char *old
= *which_path
;
453 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
458 if (parse_separators
)
460 /* This will properly parse the space and tab separators
461 and any quotes that may exist. */
462 gdb_argv
argv (dirname
);
464 for (char *arg
: argv
)
465 dirnames_to_char_ptr_vec_append (&dir_vec
, arg
);
468 dir_vec
.emplace_back (xstrdup (dirname
));
470 for (const gdb::unique_xmalloc_ptr
<char> &name_up
: dir_vec
)
472 char *name
= name_up
.get ();
475 gdb::unique_xmalloc_ptr
<char> new_name_holder
;
477 /* Spaces and tabs will have been removed by buildargv().
478 NAME is the start of the directory.
479 P is the '\0' following the end. */
480 p
= name
+ strlen (name
);
482 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
483 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
484 /* On MS-DOS and MS-Windows, h:\ is different from h: */
485 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
487 && IS_DIR_SEPARATOR (p
[-1]))
488 /* Sigh. "foo/" => "foo" */
492 while (p
> name
&& p
[-1] == '.')
496 /* "." => getwd (). */
497 name
= current_directory
;
500 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
510 /* "...foo/." => "...foo". */
521 new_name_holder
.reset (tilde_expand (name
));
522 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
523 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
524 new_name_holder
.reset (concat (name
, ".", (char *) NULL
));
526 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
527 new_name_holder
.reset (concat (current_directory
, SLASH_STRING
, name
,
530 new_name_holder
.reset (savestring (name
, p
- name
));
531 name
= new_name_holder
.get ();
533 /* Unless it's a variable, check existence. */
536 /* These are warnings, not errors, since we don't want a
537 non-existent directory in a .gdbinit file to stop processing
538 of the .gdbinit file.
540 Whether they get added to the path is more debatable. Current
541 answer is yes, in case the user wants to go make the directory
542 or whatever. If the directory continues to not exist/not be
543 a directory/etc, then having them in the path should be
545 if (stat (name
, &st
) < 0)
547 int save_errno
= errno
;
549 fprintf_unfiltered (gdb_stderr
, "Warning: ");
550 print_sys_errmsg (name
, save_errno
);
552 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
553 warning (_("%s is not a directory."), name
);
558 unsigned int len
= strlen (name
);
564 /* FIXME: we should use realpath() or its work-alike
565 before comparing. Then all the code above which
566 removes excess slashes and dots could simply go away. */
567 if (!filename_ncmp (p
, name
, len
)
568 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
570 /* Found it in the search path, remove old copy. */
573 /* Back over leading separator. */
576 if (prefix
> p
- *which_path
)
578 /* Same dir twice in one cmd. */
581 /* Copy from next '\0' or ':'. */
582 memmove (p
, &p
[len
+ 1], strlen (&p
[len
+ 1]) + 1);
584 p
= strchr (p
, DIRNAME_SEPARATOR
);
591 tinybuf
[0] = DIRNAME_SEPARATOR
;
594 /* If we have already tacked on a name(s) in this command,
595 be sure they stay on the front as we tack on some
603 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
605 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
606 prefix
= strlen (temp
);
611 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
613 prefix
= strlen (name
);
625 info_source_command (const char *ignore
, int from_tty
)
627 struct symtab
*s
= current_source_symtab
;
628 struct compunit_symtab
*cust
;
632 printf_filtered (_("No current source file.\n"));
636 cust
= SYMTAB_COMPUNIT (s
);
637 printf_filtered (_("Current source file is %s\n"), s
->filename
);
638 if (SYMTAB_DIRNAME (s
) != NULL
)
639 printf_filtered (_("Compilation directory is %s\n"), SYMTAB_DIRNAME (s
));
641 printf_filtered (_("Located in %s\n"), s
->fullname
);
643 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
644 s
->nlines
== 1 ? "" : "s");
646 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
647 printf_filtered (_("Producer is %s.\n"),
648 COMPUNIT_PRODUCER (cust
) != NULL
649 ? COMPUNIT_PRODUCER (cust
) : _("unknown"));
650 printf_filtered (_("Compiled with %s debugging format.\n"),
651 COMPUNIT_DEBUGFORMAT (cust
));
652 printf_filtered (_("%s preprocessor macro info.\n"),
653 COMPUNIT_MACRO_TABLE (cust
) != NULL
654 ? "Includes" : "Does not include");
658 /* Open a file named STRING, searching path PATH (dir names sep by some char)
659 using mode MODE in the calls to open. You cannot use this function to
660 create files (O_CREAT).
662 OPTS specifies the function behaviour in specific cases.
664 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
665 (ie pretend the first element of PATH is "."). This also indicates
666 that, unless OPF_SEARCH_IN_PATH is also specified, a slash in STRING
667 disables searching of the path (this is so that "exec-file ./foo" or
668 "symbol-file ./foo" insures that you get that particular version of
669 foo or an error message).
671 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
672 searched in path (we usually want this for source files but not for
675 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
676 the actual file opened (this string will always start with a "/"). We
677 have to take special pains to avoid doubling the "/" between the directory
678 and the file, sigh! Emacs gets confuzzed by this when we print the
681 If OPTS has OPF_RETURN_REALPATH set return FILENAME_OPENED resolved by
682 gdb_realpath. Even without OPF_RETURN_REALPATH this function still returns
683 filename starting with "/". If FILENAME_OPENED is NULL this option has no
686 If a file is found, return the descriptor.
687 Otherwise, return -1, with errno set for the last name we tried to open. */
689 /* >>>> This should only allow files of certain types,
690 >>>> eg executable, non-directory. */
692 openp (const char *path
, openp_flags opts
, const char *string
,
693 int mode
, gdb::unique_xmalloc_ptr
<char> *filename_opened
)
698 /* The errno set for the last name we tried to open (and
701 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
703 /* The open syscall MODE parameter is not specified. */
704 gdb_assert ((mode
& O_CREAT
) == 0);
705 gdb_assert (string
!= NULL
);
707 /* A file with an empty name cannot possibly exist. Report a failure
708 without further checking.
710 This is an optimization which also defends us against buggy
711 implementations of the "stat" function. For instance, we have
712 noticed that a MinGW debugger built on Windows XP 32bits crashes
713 when the debugger is started with an empty argument. */
714 if (string
[0] == '\0')
725 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
727 int i
, reg_file_errno
;
729 if (is_regular_file (string
, ®_file_errno
))
731 filename
= (char *) alloca (strlen (string
) + 1);
732 strcpy (filename
, string
);
733 fd
= gdb_open_cloexec (filename
, mode
, 0);
742 last_errno
= reg_file_errno
;
745 if (!(opts
& OPF_SEARCH_IN_PATH
))
746 for (i
= 0; string
[i
]; i
++)
747 if (IS_DIR_SEPARATOR (string
[i
]))
751 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
752 if (HAS_DRIVE_SPEC (string
))
753 string
= STRIP_DRIVE_SPEC (string
);
755 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
756 while (IS_DIR_SEPARATOR(string
[0]))
760 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
763 alloclen
= strlen (path
) + strlen (string
) + 2;
764 filename
= (char *) alloca (alloclen
);
768 dir_vec
= dirnames_to_char_ptr_vec (path
);
770 for (const gdb::unique_xmalloc_ptr
<char> &dir_up
: dir_vec
)
772 char *dir
= dir_up
.get ();
773 size_t len
= strlen (dir
);
776 if (strcmp (dir
, "$cwd") == 0)
778 /* Name is $cwd -- insert current directory name instead. */
781 /* First, realloc the filename buffer if too short. */
782 len
= strlen (current_directory
);
783 newlen
= len
+ strlen (string
) + 2;
784 if (newlen
> alloclen
)
787 filename
= (char *) alloca (alloclen
);
789 strcpy (filename
, current_directory
);
791 else if (strchr(dir
, '~'))
793 /* See whether we need to expand the tilde. */
796 gdb::unique_xmalloc_ptr
<char> tilde_expanded (tilde_expand (dir
));
798 /* First, realloc the filename buffer if too short. */
799 len
= strlen (tilde_expanded
.get ());
800 newlen
= len
+ strlen (string
) + 2;
801 if (newlen
> alloclen
)
804 filename
= (char *) alloca (alloclen
);
806 strcpy (filename
, tilde_expanded
.get ());
810 /* Normal file name in path -- just use it. */
811 strcpy (filename
, dir
);
813 /* Don't search $cdir. It's also a magic path like $cwd, but we
814 don't have enough information to expand it. The user *could*
815 have an actual directory named '$cdir' but handling that would
816 be confusing, it would mean different things in different
817 contexts. If the user really has '$cdir' one can use './$cdir'.
818 We can get $cdir when loading scripts. When loading source files
819 $cdir must have already been expanded to the correct value. */
820 if (strcmp (dir
, "$cdir") == 0)
824 /* Remove trailing slashes. */
825 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
828 strcat (filename
+ len
, SLASH_STRING
);
829 strcat (filename
, string
);
831 if (is_regular_file (filename
, ®_file_errno
))
833 fd
= gdb_open_cloexec (filename
, mode
, 0);
839 last_errno
= reg_file_errno
;
845 /* If a file was opened, canonicalize its filename. */
847 filename_opened
->reset (NULL
);
848 else if ((opts
& OPF_RETURN_REALPATH
) != 0)
849 *filename_opened
= gdb_realpath (filename
);
851 *filename_opened
= gdb_abspath (filename
);
859 /* This is essentially a convenience, for clients that want the behaviour
860 of openp, using source_path, but that really don't want the file to be
861 opened but want instead just to know what the full pathname is (as
862 qualified against source_path).
864 The current working directory is searched first.
866 If the file was found, this function returns 1, and FULL_PATHNAME is
867 set to the fully-qualified pathname.
869 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
871 source_full_path_of (const char *filename
,
872 gdb::unique_xmalloc_ptr
<char> *full_pathname
)
876 fd
= openp (source_path
,
877 OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
,
878 filename
, O_RDONLY
, full_pathname
);
881 full_pathname
->reset (NULL
);
889 /* Return non-zero if RULE matches PATH, that is if the rule can be
893 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
896 const int from_len
= strlen (rule
->from
);
897 const int path_len
= strlen (path
);
899 if (path_len
< from_len
)
902 /* The substitution rules are anchored at the start of the path,
903 so the path should start with rule->from. */
905 if (filename_ncmp (path
, rule
->from
, from_len
) != 0)
908 /* Make sure that the region in the path that matches the substitution
909 rule is immediately followed by a directory separator (or the end of
910 string character). */
912 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
918 /* Find the substitute-path rule that applies to PATH and return it.
919 Return NULL if no rule applies. */
921 static struct substitute_path_rule
*
922 get_substitute_path_rule (const char *path
)
924 struct substitute_path_rule
*rule
= substitute_path_rules
;
926 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
932 /* If the user specified a source path substitution rule that applies
933 to PATH, then apply it and return the new path.
935 Return NULL if no substitution rule was specified by the user,
936 or if no rule applied to the given PATH. */
938 gdb::unique_xmalloc_ptr
<char>
939 rewrite_source_path (const char *path
)
941 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
948 from_len
= strlen (rule
->from
);
950 /* Compute the rewritten path and return it. */
953 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
954 strcpy (new_path
, rule
->to
);
955 strcat (new_path
, path
+ from_len
);
957 return gdb::unique_xmalloc_ptr
<char> (new_path
);
963 find_and_open_source (const char *filename
,
965 gdb::unique_xmalloc_ptr
<char> *fullname
)
967 char *path
= source_path
;
971 /* Quick way out if we already know its full name. */
975 /* The user may have requested that source paths be rewritten
976 according to substitution rules he provided. If a substitution
977 rule applies to this path, then apply it. */
978 gdb::unique_xmalloc_ptr
<char> rewritten_fullname
979 = rewrite_source_path (fullname
->get ());
981 if (rewritten_fullname
!= NULL
)
982 *fullname
= std::move (rewritten_fullname
);
984 result
= gdb_open_cloexec (fullname
->get (), OPEN_MODE
, 0);
987 *fullname
= gdb_realpath (fullname
->get ());
988 return scoped_fd (result
);
991 /* Didn't work -- free old one, try again. */
992 fullname
->reset (NULL
);
995 gdb::unique_xmalloc_ptr
<char> rewritten_dirname
;
998 /* If necessary, rewrite the compilation directory name according
999 to the source path substitution rules specified by the user. */
1001 rewritten_dirname
= rewrite_source_path (dirname
);
1003 if (rewritten_dirname
!= NULL
)
1004 dirname
= rewritten_dirname
.get ();
1006 /* Replace a path entry of $cdir with the compilation directory
1009 /* We cast strstr's result in case an ANSIhole has made it const,
1010 which produces a "required warning" when assigned to a nonconst. */
1011 p
= (char *) strstr (source_path
, "$cdir");
1012 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1013 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1018 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1019 len
= p
- source_path
;
1020 strncpy (path
, source_path
, len
); /* Before $cdir */
1021 strcpy (path
+ len
, dirname
); /* new stuff */
1022 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1027 gdb::unique_xmalloc_ptr
<char> rewritten_filename
;
1028 if (IS_ABSOLUTE_PATH (filename
))
1030 /* If filename is absolute path, try the source path
1031 substitution on it. */
1032 rewritten_filename
= rewrite_source_path (filename
);
1034 if (rewritten_filename
!= NULL
)
1035 filename
= rewritten_filename
.get ();
1038 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, filename
,
1039 OPEN_MODE
, fullname
);
1042 /* Didn't work. Try using just the basename. */
1043 p
= lbasename (filename
);
1045 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, p
,
1046 OPEN_MODE
, fullname
);
1049 return scoped_fd (result
);
1052 /* Open a source file given a symtab S. Returns a file descriptor or
1053 negative number for error.
1055 This function is a convience function to find_and_open_source. */
1058 open_source_file (struct symtab
*s
)
1061 return scoped_fd (-1);
1063 gdb::unique_xmalloc_ptr
<char> fullname (s
->fullname
);
1065 scoped_fd fd
= find_and_open_source (s
->filename
, SYMTAB_DIRNAME (s
),
1067 s
->fullname
= fullname
.release ();
1071 /* Finds the fullname that a symtab represents.
1073 This functions finds the fullname and saves it in s->fullname.
1074 It will also return the value.
1076 If this function fails to find the file that this symtab represents,
1077 the expected fullname is used. Therefore the files does not have to
1081 symtab_to_fullname (struct symtab
*s
)
1083 /* Use cached copy if we have it.
1084 We rely on forget_cached_source_info being called appropriately
1085 to handle cases like the file being moved. */
1086 if (s
->fullname
== NULL
)
1088 scoped_fd fd
= open_source_file (s
);
1092 gdb::unique_xmalloc_ptr
<char> fullname
;
1094 /* rewrite_source_path would be applied by find_and_open_source, we
1095 should report the pathname where GDB tried to find the file. */
1097 if (SYMTAB_DIRNAME (s
) == NULL
|| IS_ABSOLUTE_PATH (s
->filename
))
1098 fullname
.reset (xstrdup (s
->filename
));
1100 fullname
.reset (concat (SYMTAB_DIRNAME (s
), SLASH_STRING
,
1101 s
->filename
, (char *) NULL
));
1103 s
->fullname
= rewrite_source_path (fullname
.get ()).release ();
1104 if (s
->fullname
== NULL
)
1105 s
->fullname
= fullname
.release ();
1112 /* See commentary in source.h. */
1115 symtab_to_filename_for_display (struct symtab
*symtab
)
1117 if (filename_display_string
== filename_display_basename
)
1118 return lbasename (symtab
->filename
);
1119 else if (filename_display_string
== filename_display_absolute
)
1120 return symtab_to_fullname (symtab
);
1121 else if (filename_display_string
== filename_display_relative
)
1122 return symtab
->filename
;
1124 internal_error (__FILE__
, __LINE__
, _("invalid filename_display_string"));
1127 /* Create and initialize the table S->line_charpos that records
1128 the positions of the lines in the source file, which is assumed
1129 to be open on descriptor DESC.
1130 All set S->nlines to the number of such lines. */
1133 find_source_lines (struct symtab
*s
, int desc
)
1138 int lines_allocated
= 1000;
1144 line_charpos
= XNEWVEC (int, lines_allocated
);
1145 if (fstat (desc
, &st
) < 0)
1146 perror_with_name (symtab_to_filename_for_display (s
));
1148 if (SYMTAB_OBJFILE (s
) != NULL
&& SYMTAB_OBJFILE (s
)->obfd
!= NULL
)
1149 mtime
= SYMTAB_OBJFILE (s
)->mtime
;
1151 mtime
= exec_bfd_mtime
;
1153 if (mtime
&& mtime
< st
.st_mtime
)
1154 warning (_("Source file is more recent than executable."));
1157 /* st_size might be a large type, but we only support source files whose
1158 size fits in an int. */
1159 size
= (int) st
.st_size
;
1161 /* Use the heap, not the stack, because this may be pretty large,
1162 and we may run into various kinds of limits on stack size. */
1163 gdb::def_vector
<char> data (size
);
1165 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1166 size
= myread (desc
, data
.data (), size
);
1168 perror_with_name (symtab_to_filename_for_display (s
));
1169 end
= data
.data () + size
;
1171 line_charpos
[0] = 0;
1176 /* A newline at the end does not start a new line. */
1179 if (nlines
== lines_allocated
)
1181 lines_allocated
*= 2;
1183 (int *) xrealloc ((char *) line_charpos
,
1184 sizeof (int) * lines_allocated
);
1186 line_charpos
[nlines
++] = p
- data
.data ();
1193 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1199 /* Get full pathname and line number positions for a symtab.
1200 Set *FULLNAME to actual name of the file as found by `openp',
1201 or to 0 if the file is not found. */
1204 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1206 scoped_fd desc
= open_source_file (s
);
1207 if (desc
.get () < 0)
1214 *fullname
= s
->fullname
;
1215 if (s
->line_charpos
== 0)
1216 find_source_lines (s
, desc
.get ());
1222 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1225 if (s
->line_charpos
== 0)
1226 get_filename_and_charpos (s
, (char **) NULL
);
1227 if (s
->fullname
== 0)
1229 if (line
> s
->nlines
)
1230 /* Don't index off the end of the line_charpos array. */
1232 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1233 mid_statement
, get_objfile_arch (SYMTAB_OBJFILE (s
)), pc
);
1235 current_source_line
= line
;
1236 current_source_symtab
= s
;
1237 clear_lines_listed_range ();
1242 /* Print source lines from the file of symtab S,
1243 starting with line number LINE and stopping before line number STOPLINE. */
1246 print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1247 print_source_lines_flags flags
)
1252 int nlines
= stopline
- line
;
1253 struct ui_out
*uiout
= current_uiout
;
1255 /* Regardless of whether we can open the file, set current_source_symtab. */
1256 current_source_symtab
= s
;
1257 current_source_line
= line
;
1258 first_line_listed
= line
;
1260 /* If printing of source lines is disabled, just print file and line
1262 if (uiout
->test_flags (ui_source_list
))
1264 /* Only prints "No such file or directory" once. */
1265 if ((s
!= last_source_visited
) || (!last_source_error
))
1267 last_source_visited
= s
;
1268 desc
= open_source_file (s
);
1269 if (desc
.get () < 0)
1271 last_source_error
= desc
.get ();
1277 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1283 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1289 if (!(flags
& PRINT_SOURCE_LINES_NOERROR
))
1291 const char *filename
= symtab_to_filename_for_display (s
);
1292 int len
= strlen (filename
) + 100;
1293 char *name
= (char *) alloca (len
);
1295 xsnprintf (name
, len
, "%d\t%s", line
, filename
);
1296 print_sys_errmsg (name
, errno
);
1300 uiout
->field_int ("line", line
);
1301 uiout
->text ("\tin ");
1303 /* CLI expects only the "file" field. TUI expects only the
1304 "fullname" field (and TUI does break if "file" is printed).
1305 MI expects both fields. ui_source_list is set only for CLI,
1307 if (uiout
->is_mi_like_p () || uiout
->test_flags (ui_source_list
))
1308 uiout
->field_string ("file", symtab_to_filename_for_display (s
),
1309 ui_out_style_kind::FILE);
1310 if (uiout
->is_mi_like_p () || !uiout
->test_flags (ui_source_list
))
1312 const char *s_fullname
= symtab_to_fullname (s
);
1313 char *local_fullname
;
1315 /* ui_out_field_string may free S_FULLNAME by calling
1316 open_source_file for it again. See e.g.,
1317 tui_field_string->tui_show_source. */
1318 local_fullname
= (char *) alloca (strlen (s_fullname
) + 1);
1319 strcpy (local_fullname
, s_fullname
);
1321 uiout
->field_string ("fullname", local_fullname
);
1330 last_source_error
= 0;
1332 /* If the user requested a sequence of lines that seems to go backward
1333 (from high to low line numbers) then we don't print anything. */
1334 if (stopline
<= line
)
1338 if (!g_source_cache
.get_source_lines (s
, line
, stopline
- 1, &lines
))
1339 error (_("Line number %d out of range; %s has %d lines."),
1340 line
, symtab_to_filename_for_display (s
), s
->nlines
);
1342 const char *iter
= lines
.c_str ();
1343 while (nlines
-- > 0)
1350 last_line_listed
= current_source_line
;
1351 if (flags
& PRINT_SOURCE_LINES_FILENAME
)
1353 uiout
->text (symtab_to_filename_for_display (s
));
1356 xsnprintf (buf
, sizeof (buf
), "%d\t", current_source_line
++);
1360 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r' && c
!= '\033')
1362 xsnprintf (buf
, sizeof (buf
), "^%c", c
+ 0100);
1369 /* Skip a \r character, but only before a \n. */
1371 printf_filtered ("^%c", c
+ 0100);
1375 xsnprintf (buf
, sizeof (buf
), "%c", c
);
1379 while (c
!= '\n' && (c
= *iter
++) != '\0');
1383 if (!lines
.empty() && lines
.back () != '\n')
1391 print_source_lines (struct symtab
*s
, int line
, int stopline
,
1392 print_source_lines_flags flags
)
1394 print_source_lines_base (s
, line
, stopline
, flags
);
1400 print_source_lines (struct symtab
*s
, source_lines_range line_range
,
1401 print_source_lines_flags flags
)
1403 print_source_lines_base (s
, line_range
.startline (),
1404 line_range
.stopline (), flags
);
1409 /* Print info on range of pc's in a specified line. */
1412 info_line_command (const char *arg
, int from_tty
)
1414 CORE_ADDR start_pc
, end_pc
;
1416 std::vector
<symtab_and_line
> decoded_sals
;
1417 symtab_and_line curr_sal
;
1418 gdb::array_view
<symtab_and_line
> sals
;
1422 curr_sal
.symtab
= current_source_symtab
;
1423 curr_sal
.pspace
= current_program_space
;
1424 if (last_line_listed
!= 0)
1425 curr_sal
.line
= last_line_listed
;
1427 curr_sal
.line
= current_source_line
;
1433 decoded_sals
= decode_line_with_last_displayed (arg
,
1434 DECODE_LINE_LIST_MODE
);
1435 sals
= decoded_sals
;
1440 /* C++ More than one line may have been specified, as when the user
1441 specifies an overloaded function name. Print info on them all. */
1442 for (const auto &sal
: sals
)
1444 if (sal
.pspace
!= current_program_space
)
1447 if (sal
.symtab
== 0)
1449 struct gdbarch
*gdbarch
= get_current_arch ();
1451 printf_filtered (_("No line number information available"));
1454 /* This is useful for "info line *0x7f34". If we can't tell the
1455 user about a source line, at least let them have the symbolic
1457 printf_filtered (" for address ");
1459 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1462 printf_filtered (".");
1463 printf_filtered ("\n");
1465 else if (sal
.line
> 0
1466 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1468 struct gdbarch
*gdbarch
1469 = get_objfile_arch (SYMTAB_OBJFILE (sal
.symtab
));
1471 if (start_pc
== end_pc
)
1473 printf_filtered ("Line %d of \"%s\"",
1475 symtab_to_filename_for_display (sal
.symtab
));
1477 printf_filtered (" is at address ");
1478 print_address (gdbarch
, start_pc
, gdb_stdout
);
1480 printf_filtered (" but contains no code.\n");
1484 printf_filtered ("Line %d of \"%s\"",
1486 symtab_to_filename_for_display (sal
.symtab
));
1488 printf_filtered (" starts at address ");
1489 print_address (gdbarch
, start_pc
, gdb_stdout
);
1491 printf_filtered (" and ends at ");
1492 print_address (gdbarch
, end_pc
, gdb_stdout
);
1493 printf_filtered (".\n");
1496 /* x/i should display this line's code. */
1497 set_next_address (gdbarch
, start_pc
);
1499 /* Repeating "info line" should do the following line. */
1500 last_line_listed
= sal
.line
+ 1;
1502 /* If this is the only line, show the source code. If it could
1503 not find the file, don't do anything special. */
1504 if (annotation_level
&& sals
.size () == 1)
1505 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1508 /* Is there any case in which we get here, and have an address
1509 which the user would want to see? If we have debugging symbols
1510 and no line numbers? */
1511 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1512 sal
.line
, symtab_to_filename_for_display (sal
.symtab
));
1516 /* Commands to search the source file for a regexp. */
1518 /* Helper for forward_search_command/reverse_search_command. FORWARD
1519 indicates direction: true for forward, false for
1520 backward/reverse. */
1523 search_command_helper (const char *regex
, int from_tty
, bool forward
)
1525 const char *msg
= re_comp (regex
);
1527 error (("%s"), msg
);
1529 if (current_source_symtab
== 0)
1530 select_source_symtab (0);
1532 scoped_fd desc
= open_source_file (current_source_symtab
);
1533 if (desc
.get () < 0)
1534 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1536 if (current_source_symtab
->line_charpos
== 0)
1537 find_source_lines (current_source_symtab
, desc
.get ());
1540 ? last_line_listed
+ 1
1541 : last_line_listed
- 1);
1543 if (line
< 1 || line
> current_source_symtab
->nlines
)
1544 error (_("Expression not found"));
1546 if (lseek (desc
.get (), current_source_symtab
->line_charpos
[line
- 1], 0)
1548 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1550 gdb_file_up stream
= desc
.to_file (FDOPEN_MODE
);
1551 clearerr (stream
.get ());
1553 gdb::def_vector
<char> buf
;
1560 int c
= fgetc (stream
.get ());
1567 while (c
!= '\n' && (c
= fgetc (stream
.get ())) >= 0);
1569 /* Remove the \r, if any, at the end of the line, otherwise
1570 regular expressions that end with $ or \n won't work. */
1571 size_t sz
= buf
.size ();
1572 if (sz
>= 2 && buf
[sz
- 2] == '\r')
1575 buf
.resize (sz
- 1);
1578 /* We now have a source line in buf, null terminate and match. */
1579 buf
.push_back ('\0');
1580 if (re_exec (buf
.data ()) > 0)
1583 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1584 set_internalvar_integer (lookup_internalvar ("_"), line
);
1585 current_source_line
= std::max (line
- lines_to_list
/ 2, 1);
1596 if (fseek (stream
.get (),
1597 current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1599 const char *filename
1600 = symtab_to_filename_for_display (current_source_symtab
);
1601 perror_with_name (filename
);
1606 printf_filtered (_("Expression not found\n"));
1610 forward_search_command (const char *regex
, int from_tty
)
1612 search_command_helper (regex
, from_tty
, true);
1616 reverse_search_command (const char *regex
, int from_tty
)
1618 search_command_helper (regex
, from_tty
, false);
1621 /* If the last character of PATH is a directory separator, then strip it. */
1624 strip_trailing_directory_separator (char *path
)
1626 const int last
= strlen (path
) - 1;
1629 return; /* No stripping is needed if PATH is the empty string. */
1631 if (IS_DIR_SEPARATOR (path
[last
]))
1635 /* Return the path substitution rule that matches FROM.
1636 Return NULL if no rule matches. */
1638 static struct substitute_path_rule
*
1639 find_substitute_path_rule (const char *from
)
1641 struct substitute_path_rule
*rule
= substitute_path_rules
;
1643 while (rule
!= NULL
)
1645 if (FILENAME_CMP (rule
->from
, from
) == 0)
1653 /* Add a new substitute-path rule at the end of the current list of rules.
1654 The new rule will replace FROM into TO. */
1657 add_substitute_path_rule (char *from
, char *to
)
1659 struct substitute_path_rule
*rule
;
1660 struct substitute_path_rule
*new_rule
= XNEW (struct substitute_path_rule
);
1662 new_rule
->from
= xstrdup (from
);
1663 new_rule
->to
= xstrdup (to
);
1664 new_rule
->next
= NULL
;
1666 /* If the list of rules are empty, then insert the new rule
1667 at the head of the list. */
1669 if (substitute_path_rules
== NULL
)
1671 substitute_path_rules
= new_rule
;
1675 /* Otherwise, skip to the last rule in our list and then append
1678 rule
= substitute_path_rules
;
1679 while (rule
->next
!= NULL
)
1682 rule
->next
= new_rule
;
1685 /* Remove the given source path substitution rule from the current list
1686 of rules. The memory allocated for that rule is also deallocated. */
1689 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1691 if (rule
== substitute_path_rules
)
1692 substitute_path_rules
= rule
->next
;
1695 struct substitute_path_rule
*prev
= substitute_path_rules
;
1697 while (prev
!= NULL
&& prev
->next
!= rule
)
1700 gdb_assert (prev
!= NULL
);
1702 prev
->next
= rule
->next
;
1710 /* Implement the "show substitute-path" command. */
1713 show_substitute_path_command (const char *args
, int from_tty
)
1715 struct substitute_path_rule
*rule
= substitute_path_rules
;
1718 gdb_argv
argv (args
);
1720 /* We expect zero or one argument. */
1722 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1723 error (_("Too many arguments in command"));
1725 if (argv
!= NULL
&& argv
[0] != NULL
)
1728 /* Print the substitution rules. */
1732 (_("Source path substitution rule matching `%s':\n"), from
);
1734 printf_filtered (_("List of all source path substitution rules:\n"));
1736 while (rule
!= NULL
)
1738 if (from
== NULL
|| substitute_path_rule_matches (rule
, from
) != 0)
1739 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1744 /* Implement the "unset substitute-path" command. */
1747 unset_substitute_path_command (const char *args
, int from_tty
)
1749 struct substitute_path_rule
*rule
= substitute_path_rules
;
1750 gdb_argv
argv (args
);
1754 /* This function takes either 0 or 1 argument. */
1756 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1757 error (_("Incorrect usage, too many arguments in command"));
1759 if (argv
!= NULL
&& argv
[0] != NULL
)
1762 /* If the user asked for all the rules to be deleted, ask him
1763 to confirm and give him a chance to abort before the action
1767 && !query (_("Delete all source path substitution rules? ")))
1768 error (_("Canceled"));
1770 /* Delete the rule matching the argument. No argument means that
1771 all rules should be deleted. */
1773 while (rule
!= NULL
)
1775 struct substitute_path_rule
*next
= rule
->next
;
1777 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1779 delete_substitute_path_rule (rule
);
1786 /* If the user asked for a specific rule to be deleted but
1787 we could not find it, then report an error. */
1789 if (from
!= NULL
&& !rule_found
)
1790 error (_("No substitution rule defined for `%s'"), from
);
1792 forget_cached_source_info ();
1795 /* Add a new source path substitution rule. */
1798 set_substitute_path_command (const char *args
, int from_tty
)
1800 struct substitute_path_rule
*rule
;
1802 gdb_argv
argv (args
);
1804 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1805 error (_("Incorrect usage, too few arguments in command"));
1807 if (argv
[2] != NULL
)
1808 error (_("Incorrect usage, too many arguments in command"));
1810 if (*(argv
[0]) == '\0')
1811 error (_("First argument must be at least one character long"));
1813 /* Strip any trailing directory separator character in either FROM
1814 or TO. The substitution rule already implicitly contains them. */
1815 strip_trailing_directory_separator (argv
[0]);
1816 strip_trailing_directory_separator (argv
[1]);
1818 /* If a rule with the same "from" was previously defined, then
1819 delete it. This new rule replaces it. */
1821 rule
= find_substitute_path_rule (argv
[0]);
1823 delete_substitute_path_rule (rule
);
1825 /* Insert the new substitution rule. */
1827 add_substitute_path_rule (argv
[0], argv
[1]);
1828 forget_cached_source_info ();
1833 source_lines_range::source_lines_range (int startline
,
1834 source_lines_range::direction dir
)
1836 if (dir
== source_lines_range::FORWARD
)
1838 LONGEST end
= static_cast <LONGEST
> (startline
) + get_lines_to_list ();
1843 m_startline
= startline
;
1844 m_stopline
= static_cast <int> (end
);
1848 LONGEST start
= static_cast <LONGEST
> (startline
) - get_lines_to_list ();
1853 m_startline
= static_cast <int> (start
);
1854 m_stopline
= startline
;
1860 _initialize_source (void)
1862 struct cmd_list_element
*c
;
1864 current_source_symtab
= 0;
1865 init_source_path ();
1867 /* The intention is to use POSIX Basic Regular Expressions.
1868 Always use the GNU regex routine for consistency across all hosts.
1869 Our current GNU regex.c does not have all the POSIX features, so this is
1870 just an approximation. */
1871 re_set_syntax (RE_SYNTAX_GREP
);
1873 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1874 Add directory DIR to beginning of search path for source files.\n\
1875 Forget cached info on source file locations and line positions.\n\
1876 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1877 directory in which the source file was compiled into object code.\n\
1878 With no argument, reset the search path to $cdir:$cwd, the default."),
1882 add_com_alias ("use", "directory", class_files
, 0);
1884 set_cmd_completer (c
, filename_completer
);
1886 add_setshow_optional_filename_cmd ("directories",
1890 Set the search path for finding source files."),
1892 Show the search path for finding source files."),
1894 $cwd in the path means the current working directory.\n\
1895 $cdir in the path means the compilation directory of the source file.\n\
1896 GDB ensures the search path always ends with $cdir:$cwd by\n\
1897 appending these directories if necessary.\n\
1898 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1899 set_directories_command
,
1900 show_directories_command
,
1901 &setlist
, &showlist
);
1903 add_info ("source", info_source_command
,
1904 _("Information about the current source file."));
1906 add_info ("line", info_line_command
, _("\
1907 Core addresses of the code for a source line.\n\
1908 Line can be specified as\n\
1909 LINENUM, to list around that line in current file,\n\
1910 FILE:LINENUM, to list around that line in that file,\n\
1911 FUNCTION, to list around beginning of that function,\n\
1912 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1913 Default is to describe the last source line that was listed.\n\n\
1914 This sets the default address for \"x\" to the line's first instruction\n\
1915 so that \"x/i\" suffices to start examining the machine code.\n\
1916 The address is also stored as the value of \"$_\"."));
1918 add_com ("forward-search", class_files
, forward_search_command
, _("\
1919 Search for regular expression (see regex(3)) from last line listed.\n\
1920 The matching line number is also stored as the value of \"$_\"."));
1921 add_com_alias ("search", "forward-search", class_files
, 0);
1922 add_com_alias ("fo", "forward-search", class_files
, 1);
1924 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1925 Search backward for regular expression (see regex(3)) from last line listed.\n\
1926 The matching line number is also stored as the value of \"$_\"."));
1927 add_com_alias ("rev", "reverse-search", class_files
, 1);
1929 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
1930 Set number of source lines gdb will list by default."), _("\
1931 Show number of source lines gdb will list by default."), _("\
1932 Use this to choose how many source lines the \"list\" displays (unless\n\
1933 the \"list\" argument explicitly specifies some other number).\n\
1934 A value of \"unlimited\", or zero, means there's no limit."),
1937 &setlist
, &showlist
);
1939 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
1941 Usage: set substitute-path FROM TO\n\
1942 Add a substitution rule replacing FROM into TO in source file names.\n\
1943 If a substitution rule was previously set for FROM, the old rule\n\
1944 is replaced by the new one."),
1947 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
1949 Usage: unset substitute-path [FROM]\n\
1950 Delete the rule for substituting FROM in source file names. If FROM\n\
1951 is not specified, all substituting rules are deleted.\n\
1952 If the debugger cannot find a rule for FROM, it will display a warning."),
1955 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
1957 Usage: show substitute-path [FROM]\n\
1958 Print the rule for substituting FROM in source file names. If FROM\n\
1959 is not specified, print all substitution rules."),
1962 add_setshow_enum_cmd ("filename-display", class_files
,
1963 filename_display_kind_names
,
1964 &filename_display_string
, _("\
1965 Set how to display filenames."), _("\
1966 Show how to display filenames."), _("\
1967 filename-display can be:\n\
1968 basename - display only basename of a filename\n\
1969 relative - display a filename relative to the compilation directory\n\
1970 absolute - display an absolute filename\n\
1971 By default, relative filenames are displayed."),
1973 show_filename_display_string
,
1974 &setlist
, &showlist
);