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 "common/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
)
243 current_source_symtab
= s
;
244 current_source_line
= 1;
245 current_source_pspace
= SYMTAB_PSPACE (s
);
249 if (current_source_symtab
)
252 /* Make the default place to list be the function `main'
254 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0).symbol
)
256 std::vector
<symtab_and_line
> sals
257 = decode_line_with_current_source (main_name (),
258 DECODE_LINE_FUNFIRSTLINE
);
259 const symtab_and_line
&sal
= sals
[0];
260 current_source_pspace
= sal
.pspace
;
261 current_source_symtab
= sal
.symtab
;
262 current_source_line
= std::max (sal
.line
- (lines_to_list
- 1), 1);
263 if (current_source_symtab
)
267 /* Alright; find the last file in the symtab list (ignoring .h's
268 and namespace symtabs). */
270 current_source_line
= 1;
272 for (objfile
*ofp
: current_program_space
->objfiles ())
274 for (compunit_symtab
*cu
: ofp
->compunits ())
276 for (symtab
*symtab
: compunit_filetabs (cu
))
278 const char *name
= symtab
->filename
;
279 int len
= strlen (name
);
281 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
282 || strcmp (name
, "<<C++-namespaces>>") == 0)))
284 current_source_pspace
= current_program_space
;
285 current_source_symtab
= symtab
;
291 if (current_source_symtab
)
294 for (objfile
*objfile
: current_program_space
->objfiles ())
297 s
= objfile
->sf
->qf
->find_last_source_symtab (objfile
);
299 current_source_symtab
= s
;
301 if (current_source_symtab
)
304 error (_("Can't find a default source file"));
307 /* Handler for "set directories path-list" command.
308 "set dir mumble" doesn't prepend paths, it resets the entire
309 path list. The theory is that set(show(dir)) should be a no-op. */
312 set_directories_command (const char *args
,
313 int from_tty
, struct cmd_list_element
*c
)
315 /* This is the value that was set.
316 It needs to be processed to maintain $cdir:$cwd and remove dups. */
317 char *set_path
= source_path
;
319 /* We preserve the invariant that $cdir:$cwd begins life at the end of
320 the list by calling init_source_path. If they appear earlier in
321 SET_PATH then mod_path will move them appropriately.
322 mod_path will also remove duplicates. */
324 if (*set_path
!= '\0')
325 mod_path (set_path
, &source_path
);
330 /* Print the list of source directories.
331 This is used by the "ld" command, so it has the signature of a command
335 show_directories_1 (char *ignore
, int from_tty
)
337 puts_filtered ("Source directories searched: ");
338 puts_filtered (source_path
);
339 puts_filtered ("\n");
342 /* Handler for "show directories" command. */
345 show_directories_command (struct ui_file
*file
, int from_tty
,
346 struct cmd_list_element
*c
, const char *value
)
348 show_directories_1 (NULL
, from_tty
);
354 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
356 for (compunit_symtab
*cu
: objfile
->compunits ())
358 for (symtab
*s
: compunit_filetabs (cu
))
360 if (s
->line_charpos
!= NULL
)
362 xfree (s
->line_charpos
);
363 s
->line_charpos
= NULL
;
365 if (s
->fullname
!= NULL
)
374 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
380 forget_cached_source_info (void)
382 struct program_space
*pspace
;
385 for (objfile
*objfile
: pspace
->objfiles ())
387 forget_cached_source_info_for_objfile (objfile
);
390 g_source_cache
.clear ();
391 last_source_visited
= NULL
;
395 init_source_path (void)
399 xsnprintf (buf
, sizeof (buf
), "$cdir%c$cwd", DIRNAME_SEPARATOR
);
400 source_path
= xstrdup (buf
);
401 forget_cached_source_info ();
404 /* Add zero or more directories to the front of the source path. */
407 directory_command (const char *dirname
, int from_tty
)
410 /* FIXME, this goes to "delete dir"... */
413 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
421 mod_path (dirname
, &source_path
);
422 forget_cached_source_info ();
425 show_directories_1 ((char *) 0, from_tty
);
428 /* Add a path given with the -d command line switch.
429 This will not be quoted so we must not treat spaces as separators. */
432 directory_switch (const char *dirname
, int from_tty
)
434 add_path (dirname
, &source_path
, 0);
437 /* Add zero or more directories to the front of an arbitrary path. */
440 mod_path (const char *dirname
, char **which_path
)
442 add_path (dirname
, which_path
, 1);
445 /* Workhorse of mod_path. Takes an extra argument to determine
446 if dirname should be parsed for separators that indicate multiple
447 directories. This allows for interfaces that pre-parse the dirname
448 and allow specification of traditional separator characters such
452 add_path (const char *dirname
, char **which_path
, int parse_separators
)
454 char *old
= *which_path
;
456 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
461 if (parse_separators
)
463 /* This will properly parse the space and tab separators
464 and any quotes that may exist. */
465 gdb_argv
argv (dirname
);
467 for (char *arg
: argv
)
468 dirnames_to_char_ptr_vec_append (&dir_vec
, arg
);
471 dir_vec
.emplace_back (xstrdup (dirname
));
473 for (const gdb::unique_xmalloc_ptr
<char> &name_up
: dir_vec
)
475 char *name
= name_up
.get ();
478 gdb::unique_xmalloc_ptr
<char> new_name_holder
;
480 /* Spaces and tabs will have been removed by buildargv().
481 NAME is the start of the directory.
482 P is the '\0' following the end. */
483 p
= name
+ strlen (name
);
485 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
486 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
487 /* On MS-DOS and MS-Windows, h:\ is different from h: */
488 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
490 && IS_DIR_SEPARATOR (p
[-1]))
491 /* Sigh. "foo/" => "foo" */
495 while (p
> name
&& p
[-1] == '.')
499 /* "." => getwd (). */
500 name
= current_directory
;
503 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
513 /* "...foo/." => "...foo". */
524 new_name_holder
.reset (tilde_expand (name
));
525 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
526 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
527 new_name_holder
.reset (concat (name
, ".", (char *) NULL
));
529 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
530 new_name_holder
.reset (concat (current_directory
, SLASH_STRING
, name
,
533 new_name_holder
.reset (savestring (name
, p
- name
));
534 name
= new_name_holder
.get ();
536 /* Unless it's a variable, check existence. */
539 /* These are warnings, not errors, since we don't want a
540 non-existent directory in a .gdbinit file to stop processing
541 of the .gdbinit file.
543 Whether they get added to the path is more debatable. Current
544 answer is yes, in case the user wants to go make the directory
545 or whatever. If the directory continues to not exist/not be
546 a directory/etc, then having them in the path should be
548 if (stat (name
, &st
) < 0)
550 int save_errno
= errno
;
552 fprintf_unfiltered (gdb_stderr
, "Warning: ");
553 print_sys_errmsg (name
, save_errno
);
555 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
556 warning (_("%s is not a directory."), name
);
561 unsigned int len
= strlen (name
);
567 /* FIXME: we should use realpath() or its work-alike
568 before comparing. Then all the code above which
569 removes excess slashes and dots could simply go away. */
570 if (!filename_ncmp (p
, name
, len
)
571 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
573 /* Found it in the search path, remove old copy. */
576 /* Back over leading separator. */
579 if (prefix
> p
- *which_path
)
581 /* Same dir twice in one cmd. */
584 /* Copy from next '\0' or ':'. */
585 memmove (p
, &p
[len
+ 1], strlen (&p
[len
+ 1]) + 1);
587 p
= strchr (p
, DIRNAME_SEPARATOR
);
594 tinybuf
[0] = DIRNAME_SEPARATOR
;
597 /* If we have already tacked on a name(s) in this command,
598 be sure they stay on the front as we tack on some
606 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
608 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
609 prefix
= strlen (temp
);
614 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
616 prefix
= strlen (name
);
628 info_source_command (const char *ignore
, int from_tty
)
630 struct symtab
*s
= current_source_symtab
;
631 struct compunit_symtab
*cust
;
635 printf_filtered (_("No current source file.\n"));
639 cust
= SYMTAB_COMPUNIT (s
);
640 printf_filtered (_("Current source file is %s\n"), s
->filename
);
641 if (SYMTAB_DIRNAME (s
) != NULL
)
642 printf_filtered (_("Compilation directory is %s\n"), SYMTAB_DIRNAME (s
));
644 printf_filtered (_("Located in %s\n"), s
->fullname
);
646 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
647 s
->nlines
== 1 ? "" : "s");
649 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
650 printf_filtered (_("Producer is %s.\n"),
651 COMPUNIT_PRODUCER (cust
) != NULL
652 ? COMPUNIT_PRODUCER (cust
) : _("unknown"));
653 printf_filtered (_("Compiled with %s debugging format.\n"),
654 COMPUNIT_DEBUGFORMAT (cust
));
655 printf_filtered (_("%s preprocessor macro info.\n"),
656 COMPUNIT_MACRO_TABLE (cust
) != NULL
657 ? "Includes" : "Does not include");
661 /* Open a file named STRING, searching path PATH (dir names sep by some char)
662 using mode MODE in the calls to open. You cannot use this function to
663 create files (O_CREAT).
665 OPTS specifies the function behaviour in specific cases.
667 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
668 (ie pretend the first element of PATH is "."). This also indicates
669 that, unless OPF_SEARCH_IN_PATH is also specified, a slash in STRING
670 disables searching of the path (this is so that "exec-file ./foo" or
671 "symbol-file ./foo" insures that you get that particular version of
672 foo or an error message).
674 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
675 searched in path (we usually want this for source files but not for
678 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
679 the actual file opened (this string will always start with a "/"). We
680 have to take special pains to avoid doubling the "/" between the directory
681 and the file, sigh! Emacs gets confuzzed by this when we print the
684 If OPTS has OPF_RETURN_REALPATH set return FILENAME_OPENED resolved by
685 gdb_realpath. Even without OPF_RETURN_REALPATH this function still returns
686 filename starting with "/". If FILENAME_OPENED is NULL this option has no
689 If a file is found, return the descriptor.
690 Otherwise, return -1, with errno set for the last name we tried to open. */
692 /* >>>> This should only allow files of certain types,
693 >>>> eg executable, non-directory. */
695 openp (const char *path
, openp_flags opts
, const char *string
,
696 int mode
, gdb::unique_xmalloc_ptr
<char> *filename_opened
)
701 /* The errno set for the last name we tried to open (and
704 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
706 /* The open syscall MODE parameter is not specified. */
707 gdb_assert ((mode
& O_CREAT
) == 0);
708 gdb_assert (string
!= NULL
);
710 /* A file with an empty name cannot possibly exist. Report a failure
711 without further checking.
713 This is an optimization which also defends us against buggy
714 implementations of the "stat" function. For instance, we have
715 noticed that a MinGW debugger built on Windows XP 32bits crashes
716 when the debugger is started with an empty argument. */
717 if (string
[0] == '\0')
728 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
730 int i
, reg_file_errno
;
732 if (is_regular_file (string
, ®_file_errno
))
734 filename
= (char *) alloca (strlen (string
) + 1);
735 strcpy (filename
, string
);
736 fd
= gdb_open_cloexec (filename
, mode
, 0);
745 last_errno
= reg_file_errno
;
748 if (!(opts
& OPF_SEARCH_IN_PATH
))
749 for (i
= 0; string
[i
]; i
++)
750 if (IS_DIR_SEPARATOR (string
[i
]))
754 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
755 if (HAS_DRIVE_SPEC (string
))
756 string
= STRIP_DRIVE_SPEC (string
);
758 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
759 while (IS_DIR_SEPARATOR(string
[0]))
763 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
766 alloclen
= strlen (path
) + strlen (string
) + 2;
767 filename
= (char *) alloca (alloclen
);
771 dir_vec
= dirnames_to_char_ptr_vec (path
);
773 for (const gdb::unique_xmalloc_ptr
<char> &dir_up
: dir_vec
)
775 char *dir
= dir_up
.get ();
776 size_t len
= strlen (dir
);
779 if (strcmp (dir
, "$cwd") == 0)
781 /* Name is $cwd -- insert current directory name instead. */
784 /* First, realloc the filename buffer if too short. */
785 len
= strlen (current_directory
);
786 newlen
= len
+ strlen (string
) + 2;
787 if (newlen
> alloclen
)
790 filename
= (char *) alloca (alloclen
);
792 strcpy (filename
, current_directory
);
794 else if (strchr(dir
, '~'))
796 /* See whether we need to expand the tilde. */
799 gdb::unique_xmalloc_ptr
<char> tilde_expanded (tilde_expand (dir
));
801 /* First, realloc the filename buffer if too short. */
802 len
= strlen (tilde_expanded
.get ());
803 newlen
= len
+ strlen (string
) + 2;
804 if (newlen
> alloclen
)
807 filename
= (char *) alloca (alloclen
);
809 strcpy (filename
, tilde_expanded
.get ());
813 /* Normal file name in path -- just use it. */
814 strcpy (filename
, dir
);
816 /* Don't search $cdir. It's also a magic path like $cwd, but we
817 don't have enough information to expand it. The user *could*
818 have an actual directory named '$cdir' but handling that would
819 be confusing, it would mean different things in different
820 contexts. If the user really has '$cdir' one can use './$cdir'.
821 We can get $cdir when loading scripts. When loading source files
822 $cdir must have already been expanded to the correct value. */
823 if (strcmp (dir
, "$cdir") == 0)
827 /* Remove trailing slashes. */
828 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
831 strcat (filename
+ len
, SLASH_STRING
);
832 strcat (filename
, string
);
834 if (is_regular_file (filename
, ®_file_errno
))
836 fd
= gdb_open_cloexec (filename
, mode
, 0);
842 last_errno
= reg_file_errno
;
848 /* If a file was opened, canonicalize its filename. */
850 filename_opened
->reset (NULL
);
851 else if ((opts
& OPF_RETURN_REALPATH
) != 0)
852 *filename_opened
= gdb_realpath (filename
);
854 *filename_opened
= gdb_abspath (filename
);
862 /* This is essentially a convenience, for clients that want the behaviour
863 of openp, using source_path, but that really don't want the file to be
864 opened but want instead just to know what the full pathname is (as
865 qualified against source_path).
867 The current working directory is searched first.
869 If the file was found, this function returns 1, and FULL_PATHNAME is
870 set to the fully-qualified pathname.
872 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
874 source_full_path_of (const char *filename
,
875 gdb::unique_xmalloc_ptr
<char> *full_pathname
)
879 fd
= openp (source_path
,
880 OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
,
881 filename
, O_RDONLY
, full_pathname
);
884 full_pathname
->reset (NULL
);
892 /* Return non-zero if RULE matches PATH, that is if the rule can be
896 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
899 const int from_len
= strlen (rule
->from
);
900 const int path_len
= strlen (path
);
902 if (path_len
< from_len
)
905 /* The substitution rules are anchored at the start of the path,
906 so the path should start with rule->from. */
908 if (filename_ncmp (path
, rule
->from
, from_len
) != 0)
911 /* Make sure that the region in the path that matches the substitution
912 rule is immediately followed by a directory separator (or the end of
913 string character). */
915 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
921 /* Find the substitute-path rule that applies to PATH and return it.
922 Return NULL if no rule applies. */
924 static struct substitute_path_rule
*
925 get_substitute_path_rule (const char *path
)
927 struct substitute_path_rule
*rule
= substitute_path_rules
;
929 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
935 /* If the user specified a source path substitution rule that applies
936 to PATH, then apply it and return the new path.
938 Return NULL if no substitution rule was specified by the user,
939 or if no rule applied to the given PATH. */
941 gdb::unique_xmalloc_ptr
<char>
942 rewrite_source_path (const char *path
)
944 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
951 from_len
= strlen (rule
->from
);
953 /* Compute the rewritten path and return it. */
956 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
957 strcpy (new_path
, rule
->to
);
958 strcat (new_path
, path
+ from_len
);
960 return gdb::unique_xmalloc_ptr
<char> (new_path
);
966 find_and_open_source (const char *filename
,
968 gdb::unique_xmalloc_ptr
<char> *fullname
)
970 char *path
= source_path
;
974 /* Quick way out if we already know its full name. */
978 /* The user may have requested that source paths be rewritten
979 according to substitution rules he provided. If a substitution
980 rule applies to this path, then apply it. */
981 gdb::unique_xmalloc_ptr
<char> rewritten_fullname
982 = rewrite_source_path (fullname
->get ());
984 if (rewritten_fullname
!= NULL
)
985 *fullname
= std::move (rewritten_fullname
);
987 result
= gdb_open_cloexec (fullname
->get (), OPEN_MODE
, 0);
990 *fullname
= gdb_realpath (fullname
->get ());
991 return scoped_fd (result
);
994 /* Didn't work -- free old one, try again. */
995 fullname
->reset (NULL
);
998 gdb::unique_xmalloc_ptr
<char> rewritten_dirname
;
1001 /* If necessary, rewrite the compilation directory name according
1002 to the source path substitution rules specified by the user. */
1004 rewritten_dirname
= rewrite_source_path (dirname
);
1006 if (rewritten_dirname
!= NULL
)
1007 dirname
= rewritten_dirname
.get ();
1009 /* Replace a path entry of $cdir with the compilation directory
1012 p
= strstr (source_path
, "$cdir");
1013 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1014 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1019 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1020 len
= p
- source_path
;
1021 strncpy (path
, source_path
, len
); /* Before $cdir */
1022 strcpy (path
+ len
, dirname
); /* new stuff */
1023 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1028 gdb::unique_xmalloc_ptr
<char> rewritten_filename
1029 = rewrite_source_path (filename
);
1031 if (rewritten_filename
!= NULL
)
1032 filename
= rewritten_filename
.get ();
1034 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, filename
,
1035 OPEN_MODE
, fullname
);
1038 /* Didn't work. Try using just the basename. */
1039 p
= lbasename (filename
);
1041 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, p
,
1042 OPEN_MODE
, fullname
);
1045 return scoped_fd (result
);
1048 /* Open a source file given a symtab S. Returns a file descriptor or
1049 negative number for error.
1051 This function is a convience function to find_and_open_source. */
1054 open_source_file (struct symtab
*s
)
1057 return scoped_fd (-1);
1059 gdb::unique_xmalloc_ptr
<char> fullname (s
->fullname
);
1061 scoped_fd fd
= find_and_open_source (s
->filename
, SYMTAB_DIRNAME (s
),
1063 s
->fullname
= fullname
.release ();
1067 /* Finds the fullname that a symtab represents.
1069 This functions finds the fullname and saves it in s->fullname.
1070 It will also return the value.
1072 If this function fails to find the file that this symtab represents,
1073 the expected fullname is used. Therefore the files does not have to
1077 symtab_to_fullname (struct symtab
*s
)
1079 /* Use cached copy if we have it.
1080 We rely on forget_cached_source_info being called appropriately
1081 to handle cases like the file being moved. */
1082 if (s
->fullname
== NULL
)
1084 scoped_fd fd
= open_source_file (s
);
1088 gdb::unique_xmalloc_ptr
<char> fullname
;
1090 /* rewrite_source_path would be applied by find_and_open_source, we
1091 should report the pathname where GDB tried to find the file. */
1093 if (SYMTAB_DIRNAME (s
) == NULL
|| IS_ABSOLUTE_PATH (s
->filename
))
1094 fullname
.reset (xstrdup (s
->filename
));
1096 fullname
.reset (concat (SYMTAB_DIRNAME (s
), SLASH_STRING
,
1097 s
->filename
, (char *) NULL
));
1099 s
->fullname
= rewrite_source_path (fullname
.get ()).release ();
1100 if (s
->fullname
== NULL
)
1101 s
->fullname
= fullname
.release ();
1108 /* See commentary in source.h. */
1111 symtab_to_filename_for_display (struct symtab
*symtab
)
1113 if (filename_display_string
== filename_display_basename
)
1114 return lbasename (symtab
->filename
);
1115 else if (filename_display_string
== filename_display_absolute
)
1116 return symtab_to_fullname (symtab
);
1117 else if (filename_display_string
== filename_display_relative
)
1118 return symtab
->filename
;
1120 internal_error (__FILE__
, __LINE__
, _("invalid filename_display_string"));
1123 /* Create and initialize the table S->line_charpos that records
1124 the positions of the lines in the source file, which is assumed
1125 to be open on descriptor DESC.
1126 All set S->nlines to the number of such lines. */
1129 find_source_lines (struct symtab
*s
, int desc
)
1134 int lines_allocated
= 1000;
1140 line_charpos
= XNEWVEC (int, lines_allocated
);
1141 if (fstat (desc
, &st
) < 0)
1142 perror_with_name (symtab_to_filename_for_display (s
));
1144 if (SYMTAB_OBJFILE (s
) != NULL
&& SYMTAB_OBJFILE (s
)->obfd
!= NULL
)
1145 mtime
= SYMTAB_OBJFILE (s
)->mtime
;
1147 mtime
= exec_bfd_mtime
;
1149 if (mtime
&& mtime
< st
.st_mtime
)
1150 warning (_("Source file is more recent than executable."));
1153 /* st_size might be a large type, but we only support source files whose
1154 size fits in an int. */
1155 size
= (int) st
.st_size
;
1157 /* Use the heap, not the stack, because this may be pretty large,
1158 and we may run into various kinds of limits on stack size. */
1159 gdb::def_vector
<char> data (size
);
1161 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1162 size
= myread (desc
, data
.data (), size
);
1164 perror_with_name (symtab_to_filename_for_display (s
));
1165 end
= data
.data () + size
;
1167 line_charpos
[0] = 0;
1172 /* A newline at the end does not start a new line. */
1175 if (nlines
== lines_allocated
)
1177 lines_allocated
*= 2;
1179 (int *) xrealloc ((char *) line_charpos
,
1180 sizeof (int) * lines_allocated
);
1182 line_charpos
[nlines
++] = p
- data
.data ();
1189 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1195 /* Get full pathname and line number positions for a symtab.
1196 Set *FULLNAME to actual name of the file as found by `openp',
1197 or to 0 if the file is not found. */
1200 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1202 scoped_fd desc
= open_source_file (s
);
1203 if (desc
.get () < 0)
1210 *fullname
= s
->fullname
;
1211 if (s
->line_charpos
== 0)
1212 find_source_lines (s
, desc
.get ());
1218 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1221 if (s
->line_charpos
== 0)
1222 get_filename_and_charpos (s
, (char **) NULL
);
1223 if (s
->fullname
== 0)
1225 if (line
> s
->nlines
)
1226 /* Don't index off the end of the line_charpos array. */
1228 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1229 mid_statement
, get_objfile_arch (SYMTAB_OBJFILE (s
)), pc
);
1231 current_source_line
= line
;
1232 current_source_symtab
= s
;
1233 clear_lines_listed_range ();
1238 /* Print source lines from the file of symtab S,
1239 starting with line number LINE and stopping before line number STOPLINE. */
1242 print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1243 print_source_lines_flags flags
)
1247 int nlines
= stopline
- line
;
1248 struct ui_out
*uiout
= current_uiout
;
1250 /* Regardless of whether we can open the file, set current_source_symtab. */
1251 current_source_symtab
= s
;
1252 current_source_line
= line
;
1253 first_line_listed
= line
;
1255 /* If printing of source lines is disabled, just print file and line
1257 if (uiout
->test_flags (ui_source_list
))
1259 /* Only prints "No such file or directory" once. */
1260 if ((s
!= last_source_visited
) || (!last_source_error
))
1262 last_source_visited
= s
;
1263 desc
= open_source_file (s
);
1264 if (desc
.get () < 0)
1266 last_source_error
= desc
.get ();
1272 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1278 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1284 if (!(flags
& PRINT_SOURCE_LINES_NOERROR
))
1286 const char *filename
= symtab_to_filename_for_display (s
);
1287 int len
= strlen (filename
) + 100;
1288 char *name
= (char *) alloca (len
);
1290 xsnprintf (name
, len
, "%d\t%s", line
, filename
);
1291 print_sys_errmsg (name
, errno
);
1295 uiout
->field_int ("line", line
);
1296 uiout
->text ("\tin ");
1298 /* CLI expects only the "file" field. TUI expects only the
1299 "fullname" field (and TUI does break if "file" is printed).
1300 MI expects both fields. ui_source_list is set only for CLI,
1302 if (uiout
->is_mi_like_p () || uiout
->test_flags (ui_source_list
))
1303 uiout
->field_string ("file", symtab_to_filename_for_display (s
),
1304 ui_out_style_kind::FILE);
1305 if (uiout
->is_mi_like_p () || !uiout
->test_flags (ui_source_list
))
1307 const char *s_fullname
= symtab_to_fullname (s
);
1308 char *local_fullname
;
1310 /* ui_out_field_string may free S_FULLNAME by calling
1311 open_source_file for it again. See e.g.,
1312 tui_field_string->tui_show_source. */
1313 local_fullname
= (char *) alloca (strlen (s_fullname
) + 1);
1314 strcpy (local_fullname
, s_fullname
);
1316 uiout
->field_string ("fullname", local_fullname
);
1325 last_source_error
= 0;
1327 /* If the user requested a sequence of lines that seems to go backward
1328 (from high to low line numbers) then we don't print anything. */
1329 if (stopline
<= line
)
1333 if (!g_source_cache
.get_source_lines (s
, line
, stopline
- 1, &lines
))
1334 error (_("Line number %d out of range; %s has %d lines."),
1335 line
, symtab_to_filename_for_display (s
), s
->nlines
);
1337 const char *iter
= lines
.c_str ();
1338 while (nlines
-- > 0 && *iter
!= '\0')
1342 last_line_listed
= current_source_line
;
1343 if (flags
& PRINT_SOURCE_LINES_FILENAME
)
1345 uiout
->text (symtab_to_filename_for_display (s
));
1348 xsnprintf (buf
, sizeof (buf
), "%d\t", current_source_line
++);
1351 while (*iter
!= '\0')
1353 /* Find a run of characters that can be emitted at once.
1354 This is done so that escape sequences are kept
1356 const char *start
= iter
;
1362 if (c
== '\033' && skip_ansi_escape (iter
, &skip_bytes
))
1364 else if (c
>= 0 && c
< 040 && c
!= '\t')
1373 std::string
text (start
, iter
);
1374 uiout
->text (text
.c_str ());
1378 /* Treat either \r or \r\n as a single newline. */
1384 else if (*iter
== '\n')
1389 else if (*iter
> 0 && *iter
< 040)
1391 xsnprintf (buf
, sizeof (buf
), "^%c", *iter
+ 0100);
1395 else if (*iter
== 0177)
1409 print_source_lines (struct symtab
*s
, int line
, int stopline
,
1410 print_source_lines_flags flags
)
1412 print_source_lines_base (s
, line
, stopline
, flags
);
1418 print_source_lines (struct symtab
*s
, source_lines_range line_range
,
1419 print_source_lines_flags flags
)
1421 print_source_lines_base (s
, line_range
.startline (),
1422 line_range
.stopline (), flags
);
1427 /* Print info on range of pc's in a specified line. */
1430 info_line_command (const char *arg
, int from_tty
)
1432 CORE_ADDR start_pc
, end_pc
;
1434 std::vector
<symtab_and_line
> decoded_sals
;
1435 symtab_and_line curr_sal
;
1436 gdb::array_view
<symtab_and_line
> sals
;
1440 curr_sal
.symtab
= current_source_symtab
;
1441 curr_sal
.pspace
= current_program_space
;
1442 if (last_line_listed
!= 0)
1443 curr_sal
.line
= last_line_listed
;
1445 curr_sal
.line
= current_source_line
;
1451 decoded_sals
= decode_line_with_last_displayed (arg
,
1452 DECODE_LINE_LIST_MODE
);
1453 sals
= decoded_sals
;
1458 /* C++ More than one line may have been specified, as when the user
1459 specifies an overloaded function name. Print info on them all. */
1460 for (const auto &sal
: sals
)
1462 if (sal
.pspace
!= current_program_space
)
1465 if (sal
.symtab
== 0)
1467 struct gdbarch
*gdbarch
= get_current_arch ();
1469 printf_filtered (_("No line number information available"));
1472 /* This is useful for "info line *0x7f34". If we can't tell the
1473 user about a source line, at least let them have the symbolic
1475 printf_filtered (" for address ");
1477 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1480 printf_filtered (".");
1481 printf_filtered ("\n");
1483 else if (sal
.line
> 0
1484 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1486 struct gdbarch
*gdbarch
1487 = get_objfile_arch (SYMTAB_OBJFILE (sal
.symtab
));
1489 if (start_pc
== end_pc
)
1491 printf_filtered ("Line %d of \"%s\"",
1493 symtab_to_filename_for_display (sal
.symtab
));
1495 printf_filtered (" is at address ");
1496 print_address (gdbarch
, start_pc
, gdb_stdout
);
1498 printf_filtered (" but contains no code.\n");
1502 printf_filtered ("Line %d of \"%s\"",
1504 symtab_to_filename_for_display (sal
.symtab
));
1506 printf_filtered (" starts at address ");
1507 print_address (gdbarch
, start_pc
, gdb_stdout
);
1509 printf_filtered (" and ends at ");
1510 print_address (gdbarch
, end_pc
, gdb_stdout
);
1511 printf_filtered (".\n");
1514 /* x/i should display this line's code. */
1515 set_next_address (gdbarch
, start_pc
);
1517 /* Repeating "info line" should do the following line. */
1518 last_line_listed
= sal
.line
+ 1;
1520 /* If this is the only line, show the source code. If it could
1521 not find the file, don't do anything special. */
1522 if (annotation_level
&& sals
.size () == 1)
1523 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1526 /* Is there any case in which we get here, and have an address
1527 which the user would want to see? If we have debugging symbols
1528 and no line numbers? */
1529 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1530 sal
.line
, symtab_to_filename_for_display (sal
.symtab
));
1534 /* Commands to search the source file for a regexp. */
1536 /* Helper for forward_search_command/reverse_search_command. FORWARD
1537 indicates direction: true for forward, false for
1538 backward/reverse. */
1541 search_command_helper (const char *regex
, int from_tty
, bool forward
)
1543 const char *msg
= re_comp (regex
);
1545 error (("%s"), msg
);
1547 if (current_source_symtab
== 0)
1548 select_source_symtab (0);
1550 scoped_fd desc
= open_source_file (current_source_symtab
);
1551 if (desc
.get () < 0)
1552 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1554 if (current_source_symtab
->line_charpos
== 0)
1555 find_source_lines (current_source_symtab
, desc
.get ());
1558 ? last_line_listed
+ 1
1559 : last_line_listed
- 1);
1561 if (line
< 1 || line
> current_source_symtab
->nlines
)
1562 error (_("Expression not found"));
1564 if (lseek (desc
.get (), current_source_symtab
->line_charpos
[line
- 1], 0)
1566 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1568 gdb_file_up stream
= desc
.to_file (FDOPEN_MODE
);
1569 clearerr (stream
.get ());
1571 gdb::def_vector
<char> buf
;
1578 int c
= fgetc (stream
.get ());
1585 while (c
!= '\n' && (c
= fgetc (stream
.get ())) >= 0);
1587 /* Remove the \r, if any, at the end of the line, otherwise
1588 regular expressions that end with $ or \n won't work. */
1589 size_t sz
= buf
.size ();
1590 if (sz
>= 2 && buf
[sz
- 2] == '\r')
1593 buf
.resize (sz
- 1);
1596 /* We now have a source line in buf, null terminate and match. */
1597 buf
.push_back ('\0');
1598 if (re_exec (buf
.data ()) > 0)
1601 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1602 set_internalvar_integer (lookup_internalvar ("_"), line
);
1603 current_source_line
= std::max (line
- lines_to_list
/ 2, 1);
1614 if (fseek (stream
.get (),
1615 current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1617 const char *filename
1618 = symtab_to_filename_for_display (current_source_symtab
);
1619 perror_with_name (filename
);
1624 printf_filtered (_("Expression not found\n"));
1628 forward_search_command (const char *regex
, int from_tty
)
1630 search_command_helper (regex
, from_tty
, true);
1634 reverse_search_command (const char *regex
, int from_tty
)
1636 search_command_helper (regex
, from_tty
, false);
1639 /* If the last character of PATH is a directory separator, then strip it. */
1642 strip_trailing_directory_separator (char *path
)
1644 const int last
= strlen (path
) - 1;
1647 return; /* No stripping is needed if PATH is the empty string. */
1649 if (IS_DIR_SEPARATOR (path
[last
]))
1653 /* Return the path substitution rule that matches FROM.
1654 Return NULL if no rule matches. */
1656 static struct substitute_path_rule
*
1657 find_substitute_path_rule (const char *from
)
1659 struct substitute_path_rule
*rule
= substitute_path_rules
;
1661 while (rule
!= NULL
)
1663 if (FILENAME_CMP (rule
->from
, from
) == 0)
1671 /* Add a new substitute-path rule at the end of the current list of rules.
1672 The new rule will replace FROM into TO. */
1675 add_substitute_path_rule (char *from
, char *to
)
1677 struct substitute_path_rule
*rule
;
1678 struct substitute_path_rule
*new_rule
= XNEW (struct substitute_path_rule
);
1680 new_rule
->from
= xstrdup (from
);
1681 new_rule
->to
= xstrdup (to
);
1682 new_rule
->next
= NULL
;
1684 /* If the list of rules are empty, then insert the new rule
1685 at the head of the list. */
1687 if (substitute_path_rules
== NULL
)
1689 substitute_path_rules
= new_rule
;
1693 /* Otherwise, skip to the last rule in our list and then append
1696 rule
= substitute_path_rules
;
1697 while (rule
->next
!= NULL
)
1700 rule
->next
= new_rule
;
1703 /* Remove the given source path substitution rule from the current list
1704 of rules. The memory allocated for that rule is also deallocated. */
1707 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1709 if (rule
== substitute_path_rules
)
1710 substitute_path_rules
= rule
->next
;
1713 struct substitute_path_rule
*prev
= substitute_path_rules
;
1715 while (prev
!= NULL
&& prev
->next
!= rule
)
1718 gdb_assert (prev
!= NULL
);
1720 prev
->next
= rule
->next
;
1728 /* Implement the "show substitute-path" command. */
1731 show_substitute_path_command (const char *args
, int from_tty
)
1733 struct substitute_path_rule
*rule
= substitute_path_rules
;
1736 gdb_argv
argv (args
);
1738 /* We expect zero or one argument. */
1740 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1741 error (_("Too many arguments in command"));
1743 if (argv
!= NULL
&& argv
[0] != NULL
)
1746 /* Print the substitution rules. */
1750 (_("Source path substitution rule matching `%s':\n"), from
);
1752 printf_filtered (_("List of all source path substitution rules:\n"));
1754 while (rule
!= NULL
)
1756 if (from
== NULL
|| substitute_path_rule_matches (rule
, from
) != 0)
1757 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1762 /* Implement the "unset substitute-path" command. */
1765 unset_substitute_path_command (const char *args
, int from_tty
)
1767 struct substitute_path_rule
*rule
= substitute_path_rules
;
1768 gdb_argv
argv (args
);
1772 /* This function takes either 0 or 1 argument. */
1774 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1775 error (_("Incorrect usage, too many arguments in command"));
1777 if (argv
!= NULL
&& argv
[0] != NULL
)
1780 /* If the user asked for all the rules to be deleted, ask him
1781 to confirm and give him a chance to abort before the action
1785 && !query (_("Delete all source path substitution rules? ")))
1786 error (_("Canceled"));
1788 /* Delete the rule matching the argument. No argument means that
1789 all rules should be deleted. */
1791 while (rule
!= NULL
)
1793 struct substitute_path_rule
*next
= rule
->next
;
1795 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1797 delete_substitute_path_rule (rule
);
1804 /* If the user asked for a specific rule to be deleted but
1805 we could not find it, then report an error. */
1807 if (from
!= NULL
&& !rule_found
)
1808 error (_("No substitution rule defined for `%s'"), from
);
1810 forget_cached_source_info ();
1813 /* Add a new source path substitution rule. */
1816 set_substitute_path_command (const char *args
, int from_tty
)
1818 struct substitute_path_rule
*rule
;
1820 gdb_argv
argv (args
);
1822 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1823 error (_("Incorrect usage, too few arguments in command"));
1825 if (argv
[2] != NULL
)
1826 error (_("Incorrect usage, too many arguments in command"));
1828 if (*(argv
[0]) == '\0')
1829 error (_("First argument must be at least one character long"));
1831 /* Strip any trailing directory separator character in either FROM
1832 or TO. The substitution rule already implicitly contains them. */
1833 strip_trailing_directory_separator (argv
[0]);
1834 strip_trailing_directory_separator (argv
[1]);
1836 /* If a rule with the same "from" was previously defined, then
1837 delete it. This new rule replaces it. */
1839 rule
= find_substitute_path_rule (argv
[0]);
1841 delete_substitute_path_rule (rule
);
1843 /* Insert the new substitution rule. */
1845 add_substitute_path_rule (argv
[0], argv
[1]);
1846 forget_cached_source_info ();
1851 source_lines_range::source_lines_range (int startline
,
1852 source_lines_range::direction dir
)
1854 if (dir
== source_lines_range::FORWARD
)
1856 LONGEST end
= static_cast <LONGEST
> (startline
) + get_lines_to_list ();
1861 m_startline
= startline
;
1862 m_stopline
= static_cast <int> (end
);
1866 LONGEST start
= static_cast <LONGEST
> (startline
) - get_lines_to_list ();
1871 m_startline
= static_cast <int> (start
);
1872 m_stopline
= startline
;
1878 _initialize_source (void)
1880 struct cmd_list_element
*c
;
1882 current_source_symtab
= 0;
1883 init_source_path ();
1885 /* The intention is to use POSIX Basic Regular Expressions.
1886 Always use the GNU regex routine for consistency across all hosts.
1887 Our current GNU regex.c does not have all the POSIX features, so this is
1888 just an approximation. */
1889 re_set_syntax (RE_SYNTAX_GREP
);
1891 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1892 Add directory DIR to beginning of search path for source files.\n\
1893 Forget cached info on source file locations and line positions.\n\
1894 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1895 directory in which the source file was compiled into object code.\n\
1896 With no argument, reset the search path to $cdir:$cwd, the default."),
1900 add_com_alias ("use", "directory", class_files
, 0);
1902 set_cmd_completer (c
, filename_completer
);
1904 add_setshow_optional_filename_cmd ("directories",
1908 Set the search path for finding source files."),
1910 Show the search path for finding source files."),
1912 $cwd in the path means the current working directory.\n\
1913 $cdir in the path means the compilation directory of the source file.\n\
1914 GDB ensures the search path always ends with $cdir:$cwd by\n\
1915 appending these directories if necessary.\n\
1916 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1917 set_directories_command
,
1918 show_directories_command
,
1919 &setlist
, &showlist
);
1921 add_info ("source", info_source_command
,
1922 _("Information about the current source file."));
1924 add_info ("line", info_line_command
, _("\
1925 Core addresses of the code for a source line.\n\
1926 Line can be specified as\n\
1927 LINENUM, to list around that line in current file,\n\
1928 FILE:LINENUM, to list around that line in that file,\n\
1929 FUNCTION, to list around beginning of that function,\n\
1930 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1931 Default is to describe the last source line that was listed.\n\n\
1932 This sets the default address for \"x\" to the line's first instruction\n\
1933 so that \"x/i\" suffices to start examining the machine code.\n\
1934 The address is also stored as the value of \"$_\"."));
1936 add_com ("forward-search", class_files
, forward_search_command
, _("\
1937 Search for regular expression (see regex(3)) from last line listed.\n\
1938 The matching line number is also stored as the value of \"$_\"."));
1939 add_com_alias ("search", "forward-search", class_files
, 0);
1940 add_com_alias ("fo", "forward-search", class_files
, 1);
1942 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1943 Search backward for regular expression (see regex(3)) from last line listed.\n\
1944 The matching line number is also stored as the value of \"$_\"."));
1945 add_com_alias ("rev", "reverse-search", class_files
, 1);
1947 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
1948 Set number of source lines gdb will list by default."), _("\
1949 Show number of source lines gdb will list by default."), _("\
1950 Use this to choose how many source lines the \"list\" displays (unless\n\
1951 the \"list\" argument explicitly specifies some other number).\n\
1952 A value of \"unlimited\", or zero, means there's no limit."),
1955 &setlist
, &showlist
);
1957 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
1959 Usage: set substitute-path FROM TO\n\
1960 Add a substitution rule replacing FROM into TO in source file names.\n\
1961 If a substitution rule was previously set for FROM, the old rule\n\
1962 is replaced by the new one."),
1965 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
1967 Usage: unset substitute-path [FROM]\n\
1968 Delete the rule for substituting FROM in source file names. If FROM\n\
1969 is not specified, all substituting rules are deleted.\n\
1970 If the debugger cannot find a rule for FROM, it will display a warning."),
1973 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
1975 Usage: show substitute-path [FROM]\n\
1976 Print the rule for substituting FROM in source file names. If FROM\n\
1977 is not specified, print all substitution rules."),
1980 add_setshow_enum_cmd ("filename-display", class_files
,
1981 filename_display_kind_names
,
1982 &filename_display_string
, _("\
1983 Set how to display filenames."), _("\
1984 Show how to display filenames."), _("\
1985 filename-display can be:\n\
1986 basename - display only basename of a filename\n\
1987 relative - display a filename relative to the compilation directory\n\
1988 absolute - display an absolute filename\n\
1989 By default, relative filenames are displayed."),
1991 show_filename_display_string
,
1992 &setlist
, &showlist
);