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
)
245 current_source_symtab
= s
;
246 current_source_line
= 1;
247 current_source_pspace
= SYMTAB_PSPACE (s
);
251 if (current_source_symtab
)
254 /* Make the default place to list be the function `main'
256 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0).symbol
)
258 std::vector
<symtab_and_line
> sals
259 = decode_line_with_current_source (main_name (),
260 DECODE_LINE_FUNFIRSTLINE
);
261 const symtab_and_line
&sal
= sals
[0];
262 current_source_pspace
= sal
.pspace
;
263 current_source_symtab
= sal
.symtab
;
264 current_source_line
= std::max (sal
.line
- (lines_to_list
- 1), 1);
265 if (current_source_symtab
)
269 /* Alright; find the last file in the symtab list (ignoring .h's
270 and namespace symtabs). */
272 current_source_line
= 1;
274 ALL_FILETABS (ofp
, cu
, s
)
276 const char *name
= s
->filename
;
277 int len
= strlen (name
);
279 if (!(len
> 2 && (strcmp (&name
[len
- 2], ".h") == 0
280 || strcmp (name
, "<<C++-namespaces>>") == 0)))
282 current_source_pspace
= current_program_space
;
283 current_source_symtab
= s
;
287 if (current_source_symtab
)
290 for (objfile
*objfile
: all_objfiles (current_program_space
))
293 s
= objfile
->sf
->qf
->find_last_source_symtab (objfile
);
295 current_source_symtab
= s
;
297 if (current_source_symtab
)
300 error (_("Can't find a default source file"));
303 /* Handler for "set directories path-list" command.
304 "set dir mumble" doesn't prepend paths, it resets the entire
305 path list. The theory is that set(show(dir)) should be a no-op. */
308 set_directories_command (const char *args
,
309 int from_tty
, struct cmd_list_element
*c
)
311 /* This is the value that was set.
312 It needs to be processed to maintain $cdir:$cwd and remove dups. */
313 char *set_path
= source_path
;
315 /* We preserve the invariant that $cdir:$cwd begins life at the end of
316 the list by calling init_source_path. If they appear earlier in
317 SET_PATH then mod_path will move them appropriately.
318 mod_path will also remove duplicates. */
320 if (*set_path
!= '\0')
321 mod_path (set_path
, &source_path
);
326 /* Print the list of source directories.
327 This is used by the "ld" command, so it has the signature of a command
331 show_directories_1 (char *ignore
, int from_tty
)
333 puts_filtered ("Source directories searched: ");
334 puts_filtered (source_path
);
335 puts_filtered ("\n");
338 /* Handler for "show directories" command. */
341 show_directories_command (struct ui_file
*file
, int from_tty
,
342 struct cmd_list_element
*c
, const char *value
)
344 show_directories_1 (NULL
, from_tty
);
350 forget_cached_source_info_for_objfile (struct objfile
*objfile
)
354 ALL_OBJFILE_FILETABS (objfile
, cu
, s
)
356 if (s
->line_charpos
!= NULL
)
358 xfree (s
->line_charpos
);
359 s
->line_charpos
= NULL
;
361 if (s
->fullname
!= NULL
)
369 objfile
->sf
->qf
->forget_cached_source_info (objfile
);
375 forget_cached_source_info (void)
377 struct program_space
*pspace
;
380 for (objfile
*objfile
: all_objfiles (pspace
))
382 forget_cached_source_info_for_objfile (objfile
);
385 g_source_cache
.clear ();
386 last_source_visited
= NULL
;
390 init_source_path (void)
394 xsnprintf (buf
, sizeof (buf
), "$cdir%c$cwd", DIRNAME_SEPARATOR
);
395 source_path
= xstrdup (buf
);
396 forget_cached_source_info ();
399 /* Add zero or more directories to the front of the source path. */
402 directory_command (const char *dirname
, int from_tty
)
405 /* FIXME, this goes to "delete dir"... */
408 if (!from_tty
|| query (_("Reinitialize source path to empty? ")))
416 mod_path (dirname
, &source_path
);
417 forget_cached_source_info ();
420 show_directories_1 ((char *) 0, from_tty
);
423 /* Add a path given with the -d command line switch.
424 This will not be quoted so we must not treat spaces as separators. */
427 directory_switch (const char *dirname
, int from_tty
)
429 add_path (dirname
, &source_path
, 0);
432 /* Add zero or more directories to the front of an arbitrary path. */
435 mod_path (const char *dirname
, char **which_path
)
437 add_path (dirname
, which_path
, 1);
440 /* Workhorse of mod_path. Takes an extra argument to determine
441 if dirname should be parsed for separators that indicate multiple
442 directories. This allows for interfaces that pre-parse the dirname
443 and allow specification of traditional separator characters such
447 add_path (const char *dirname
, char **which_path
, int parse_separators
)
449 char *old
= *which_path
;
451 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
456 if (parse_separators
)
458 /* This will properly parse the space and tab separators
459 and any quotes that may exist. */
460 gdb_argv
argv (dirname
);
462 for (char *arg
: argv
)
463 dirnames_to_char_ptr_vec_append (&dir_vec
, arg
);
466 dir_vec
.emplace_back (xstrdup (dirname
));
468 for (const gdb::unique_xmalloc_ptr
<char> &name_up
: dir_vec
)
470 char *name
= name_up
.get ();
473 gdb::unique_xmalloc_ptr
<char> new_name_holder
;
475 /* Spaces and tabs will have been removed by buildargv().
476 NAME is the start of the directory.
477 P is the '\0' following the end. */
478 p
= name
+ strlen (name
);
480 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
481 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
482 /* On MS-DOS and MS-Windows, h:\ is different from h: */
483 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
485 && IS_DIR_SEPARATOR (p
[-1]))
486 /* Sigh. "foo/" => "foo" */
490 while (p
> name
&& p
[-1] == '.')
494 /* "." => getwd (). */
495 name
= current_directory
;
498 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
508 /* "...foo/." => "...foo". */
519 new_name_holder
.reset (tilde_expand (name
));
520 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
521 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
522 new_name_holder
.reset (concat (name
, ".", (char *) NULL
));
524 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
525 new_name_holder
.reset (concat (current_directory
, SLASH_STRING
, name
,
528 new_name_holder
.reset (savestring (name
, p
- name
));
529 name
= new_name_holder
.get ();
531 /* Unless it's a variable, check existence. */
534 /* These are warnings, not errors, since we don't want a
535 non-existent directory in a .gdbinit file to stop processing
536 of the .gdbinit file.
538 Whether they get added to the path is more debatable. Current
539 answer is yes, in case the user wants to go make the directory
540 or whatever. If the directory continues to not exist/not be
541 a directory/etc, then having them in the path should be
543 if (stat (name
, &st
) < 0)
545 int save_errno
= errno
;
547 fprintf_unfiltered (gdb_stderr
, "Warning: ");
548 print_sys_errmsg (name
, save_errno
);
550 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
551 warning (_("%s is not a directory."), name
);
556 unsigned int len
= strlen (name
);
562 /* FIXME: we should use realpath() or its work-alike
563 before comparing. Then all the code above which
564 removes excess slashes and dots could simply go away. */
565 if (!filename_ncmp (p
, name
, len
)
566 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
568 /* Found it in the search path, remove old copy. */
571 /* Back over leading separator. */
574 if (prefix
> p
- *which_path
)
576 /* Same dir twice in one cmd. */
579 /* Copy from next '\0' or ':'. */
580 memmove (p
, &p
[len
+ 1], strlen (&p
[len
+ 1]) + 1);
582 p
= strchr (p
, DIRNAME_SEPARATOR
);
589 tinybuf
[0] = DIRNAME_SEPARATOR
;
592 /* If we have already tacked on a name(s) in this command,
593 be sure they stay on the front as we tack on some
601 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
603 *which_path
= concat (temp
, "", &old
[prefix
], (char *) NULL
);
604 prefix
= strlen (temp
);
609 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
611 prefix
= strlen (name
);
623 info_source_command (const char *ignore
, int from_tty
)
625 struct symtab
*s
= current_source_symtab
;
626 struct compunit_symtab
*cust
;
630 printf_filtered (_("No current source file.\n"));
634 cust
= SYMTAB_COMPUNIT (s
);
635 printf_filtered (_("Current source file is %s\n"), s
->filename
);
636 if (SYMTAB_DIRNAME (s
) != NULL
)
637 printf_filtered (_("Compilation directory is %s\n"), SYMTAB_DIRNAME (s
));
639 printf_filtered (_("Located in %s\n"), s
->fullname
);
641 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
642 s
->nlines
== 1 ? "" : "s");
644 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
645 printf_filtered (_("Producer is %s.\n"),
646 COMPUNIT_PRODUCER (cust
) != NULL
647 ? COMPUNIT_PRODUCER (cust
) : _("unknown"));
648 printf_filtered (_("Compiled with %s debugging format.\n"),
649 COMPUNIT_DEBUGFORMAT (cust
));
650 printf_filtered (_("%s preprocessor macro info.\n"),
651 COMPUNIT_MACRO_TABLE (cust
) != NULL
652 ? "Includes" : "Does not include");
656 /* Open a file named STRING, searching path PATH (dir names sep by some char)
657 using mode MODE in the calls to open. You cannot use this function to
658 create files (O_CREAT).
660 OPTS specifies the function behaviour in specific cases.
662 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
663 (ie pretend the first element of PATH is "."). This also indicates
664 that, unless OPF_SEARCH_IN_PATH is also specified, a slash in STRING
665 disables searching of the path (this is so that "exec-file ./foo" or
666 "symbol-file ./foo" insures that you get that particular version of
667 foo or an error message).
669 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
670 searched in path (we usually want this for source files but not for
673 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
674 the actual file opened (this string will always start with a "/"). We
675 have to take special pains to avoid doubling the "/" between the directory
676 and the file, sigh! Emacs gets confuzzed by this when we print the
679 If OPTS has OPF_RETURN_REALPATH set return FILENAME_OPENED resolved by
680 gdb_realpath. Even without OPF_RETURN_REALPATH this function still returns
681 filename starting with "/". If FILENAME_OPENED is NULL this option has no
684 If a file is found, return the descriptor.
685 Otherwise, return -1, with errno set for the last name we tried to open. */
687 /* >>>> This should only allow files of certain types,
688 >>>> eg executable, non-directory. */
690 openp (const char *path
, openp_flags opts
, const char *string
,
691 int mode
, gdb::unique_xmalloc_ptr
<char> *filename_opened
)
696 /* The errno set for the last name we tried to open (and
699 std::vector
<gdb::unique_xmalloc_ptr
<char>> dir_vec
;
701 /* The open syscall MODE parameter is not specified. */
702 gdb_assert ((mode
& O_CREAT
) == 0);
703 gdb_assert (string
!= NULL
);
705 /* A file with an empty name cannot possibly exist. Report a failure
706 without further checking.
708 This is an optimization which also defends us against buggy
709 implementations of the "stat" function. For instance, we have
710 noticed that a MinGW debugger built on Windows XP 32bits crashes
711 when the debugger is started with an empty argument. */
712 if (string
[0] == '\0')
723 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
725 int i
, reg_file_errno
;
727 if (is_regular_file (string
, ®_file_errno
))
729 filename
= (char *) alloca (strlen (string
) + 1);
730 strcpy (filename
, string
);
731 fd
= gdb_open_cloexec (filename
, mode
, 0);
740 last_errno
= reg_file_errno
;
743 if (!(opts
& OPF_SEARCH_IN_PATH
))
744 for (i
= 0; string
[i
]; i
++)
745 if (IS_DIR_SEPARATOR (string
[i
]))
749 /* For dos paths, d:/foo -> /foo, and d:foo -> foo. */
750 if (HAS_DRIVE_SPEC (string
))
751 string
= STRIP_DRIVE_SPEC (string
);
753 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
754 while (IS_DIR_SEPARATOR(string
[0]))
758 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
761 alloclen
= strlen (path
) + strlen (string
) + 2;
762 filename
= (char *) alloca (alloclen
);
766 dir_vec
= dirnames_to_char_ptr_vec (path
);
768 for (const gdb::unique_xmalloc_ptr
<char> &dir_up
: dir_vec
)
770 char *dir
= dir_up
.get ();
771 size_t len
= strlen (dir
);
774 if (strcmp (dir
, "$cwd") == 0)
776 /* Name is $cwd -- insert current directory name instead. */
779 /* First, realloc the filename buffer if too short. */
780 len
= strlen (current_directory
);
781 newlen
= len
+ strlen (string
) + 2;
782 if (newlen
> alloclen
)
785 filename
= (char *) alloca (alloclen
);
787 strcpy (filename
, current_directory
);
789 else if (strchr(dir
, '~'))
791 /* See whether we need to expand the tilde. */
794 gdb::unique_xmalloc_ptr
<char> tilde_expanded (tilde_expand (dir
));
796 /* First, realloc the filename buffer if too short. */
797 len
= strlen (tilde_expanded
.get ());
798 newlen
= len
+ strlen (string
) + 2;
799 if (newlen
> alloclen
)
802 filename
= (char *) alloca (alloclen
);
804 strcpy (filename
, tilde_expanded
.get ());
808 /* Normal file name in path -- just use it. */
809 strcpy (filename
, dir
);
811 /* Don't search $cdir. It's also a magic path like $cwd, but we
812 don't have enough information to expand it. The user *could*
813 have an actual directory named '$cdir' but handling that would
814 be confusing, it would mean different things in different
815 contexts. If the user really has '$cdir' one can use './$cdir'.
816 We can get $cdir when loading scripts. When loading source files
817 $cdir must have already been expanded to the correct value. */
818 if (strcmp (dir
, "$cdir") == 0)
822 /* Remove trailing slashes. */
823 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
826 strcat (filename
+ len
, SLASH_STRING
);
827 strcat (filename
, string
);
829 if (is_regular_file (filename
, ®_file_errno
))
831 fd
= gdb_open_cloexec (filename
, mode
, 0);
837 last_errno
= reg_file_errno
;
843 /* If a file was opened, canonicalize its filename. */
845 filename_opened
->reset (NULL
);
846 else if ((opts
& OPF_RETURN_REALPATH
) != 0)
847 *filename_opened
= gdb_realpath (filename
);
849 *filename_opened
= gdb_abspath (filename
);
857 /* This is essentially a convenience, for clients that want the behaviour
858 of openp, using source_path, but that really don't want the file to be
859 opened but want instead just to know what the full pathname is (as
860 qualified against source_path).
862 The current working directory is searched first.
864 If the file was found, this function returns 1, and FULL_PATHNAME is
865 set to the fully-qualified pathname.
867 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
869 source_full_path_of (const char *filename
,
870 gdb::unique_xmalloc_ptr
<char> *full_pathname
)
874 fd
= openp (source_path
,
875 OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
,
876 filename
, O_RDONLY
, full_pathname
);
879 full_pathname
->reset (NULL
);
887 /* Return non-zero if RULE matches PATH, that is if the rule can be
891 substitute_path_rule_matches (const struct substitute_path_rule
*rule
,
894 const int from_len
= strlen (rule
->from
);
895 const int path_len
= strlen (path
);
897 if (path_len
< from_len
)
900 /* The substitution rules are anchored at the start of the path,
901 so the path should start with rule->from. */
903 if (filename_ncmp (path
, rule
->from
, from_len
) != 0)
906 /* Make sure that the region in the path that matches the substitution
907 rule is immediately followed by a directory separator (or the end of
908 string character). */
910 if (path
[from_len
] != '\0' && !IS_DIR_SEPARATOR (path
[from_len
]))
916 /* Find the substitute-path rule that applies to PATH and return it.
917 Return NULL if no rule applies. */
919 static struct substitute_path_rule
*
920 get_substitute_path_rule (const char *path
)
922 struct substitute_path_rule
*rule
= substitute_path_rules
;
924 while (rule
!= NULL
&& !substitute_path_rule_matches (rule
, path
))
930 /* If the user specified a source path substitution rule that applies
931 to PATH, then apply it and return the new path.
933 Return NULL if no substitution rule was specified by the user,
934 or if no rule applied to the given PATH. */
936 gdb::unique_xmalloc_ptr
<char>
937 rewrite_source_path (const char *path
)
939 const struct substitute_path_rule
*rule
= get_substitute_path_rule (path
);
946 from_len
= strlen (rule
->from
);
948 /* Compute the rewritten path and return it. */
951 (char *) xmalloc (strlen (path
) + 1 + strlen (rule
->to
) - from_len
);
952 strcpy (new_path
, rule
->to
);
953 strcat (new_path
, path
+ from_len
);
955 return gdb::unique_xmalloc_ptr
<char> (new_path
);
961 find_and_open_source (const char *filename
,
963 gdb::unique_xmalloc_ptr
<char> *fullname
)
965 char *path
= source_path
;
969 /* Quick way out if we already know its full name. */
973 /* The user may have requested that source paths be rewritten
974 according to substitution rules he provided. If a substitution
975 rule applies to this path, then apply it. */
976 gdb::unique_xmalloc_ptr
<char> rewritten_fullname
977 = rewrite_source_path (fullname
->get ());
979 if (rewritten_fullname
!= NULL
)
980 *fullname
= std::move (rewritten_fullname
);
982 result
= gdb_open_cloexec (fullname
->get (), OPEN_MODE
, 0);
985 *fullname
= gdb_realpath (fullname
->get ());
986 return scoped_fd (result
);
989 /* Didn't work -- free old one, try again. */
990 fullname
->reset (NULL
);
993 gdb::unique_xmalloc_ptr
<char> rewritten_dirname
;
996 /* If necessary, rewrite the compilation directory name according
997 to the source path substitution rules specified by the user. */
999 rewritten_dirname
= rewrite_source_path (dirname
);
1001 if (rewritten_dirname
!= NULL
)
1002 dirname
= rewritten_dirname
.get ();
1004 /* Replace a path entry of $cdir with the compilation directory
1007 /* We cast strstr's result in case an ANSIhole has made it const,
1008 which produces a "required warning" when assigned to a nonconst. */
1009 p
= (char *) strstr (source_path
, "$cdir");
1010 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
1011 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
1016 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
1017 len
= p
- source_path
;
1018 strncpy (path
, source_path
, len
); /* Before $cdir */
1019 strcpy (path
+ len
, dirname
); /* new stuff */
1020 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After
1025 gdb::unique_xmalloc_ptr
<char> rewritten_filename
;
1026 if (IS_ABSOLUTE_PATH (filename
))
1028 /* If filename is absolute path, try the source path
1029 substitution on it. */
1030 rewritten_filename
= rewrite_source_path (filename
);
1032 if (rewritten_filename
!= NULL
)
1033 filename
= rewritten_filename
.get ();
1036 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, filename
,
1037 OPEN_MODE
, fullname
);
1040 /* Didn't work. Try using just the basename. */
1041 p
= lbasename (filename
);
1043 result
= openp (path
, OPF_SEARCH_IN_PATH
| OPF_RETURN_REALPATH
, p
,
1044 OPEN_MODE
, fullname
);
1047 return scoped_fd (result
);
1050 /* Open a source file given a symtab S. Returns a file descriptor or
1051 negative number for error.
1053 This function is a convience function to find_and_open_source. */
1056 open_source_file (struct symtab
*s
)
1059 return scoped_fd (-1);
1061 gdb::unique_xmalloc_ptr
<char> fullname (s
->fullname
);
1063 scoped_fd fd
= find_and_open_source (s
->filename
, SYMTAB_DIRNAME (s
),
1065 s
->fullname
= fullname
.release ();
1069 /* Finds the fullname that a symtab represents.
1071 This functions finds the fullname and saves it in s->fullname.
1072 It will also return the value.
1074 If this function fails to find the file that this symtab represents,
1075 the expected fullname is used. Therefore the files does not have to
1079 symtab_to_fullname (struct symtab
*s
)
1081 /* Use cached copy if we have it.
1082 We rely on forget_cached_source_info being called appropriately
1083 to handle cases like the file being moved. */
1084 if (s
->fullname
== NULL
)
1086 scoped_fd fd
= open_source_file (s
);
1090 gdb::unique_xmalloc_ptr
<char> fullname
;
1092 /* rewrite_source_path would be applied by find_and_open_source, we
1093 should report the pathname where GDB tried to find the file. */
1095 if (SYMTAB_DIRNAME (s
) == NULL
|| IS_ABSOLUTE_PATH (s
->filename
))
1096 fullname
.reset (xstrdup (s
->filename
));
1098 fullname
.reset (concat (SYMTAB_DIRNAME (s
), SLASH_STRING
,
1099 s
->filename
, (char *) NULL
));
1101 s
->fullname
= rewrite_source_path (fullname
.get ()).release ();
1102 if (s
->fullname
== NULL
)
1103 s
->fullname
= fullname
.release ();
1110 /* See commentary in source.h. */
1113 symtab_to_filename_for_display (struct symtab
*symtab
)
1115 if (filename_display_string
== filename_display_basename
)
1116 return lbasename (symtab
->filename
);
1117 else if (filename_display_string
== filename_display_absolute
)
1118 return symtab_to_fullname (symtab
);
1119 else if (filename_display_string
== filename_display_relative
)
1120 return symtab
->filename
;
1122 internal_error (__FILE__
, __LINE__
, _("invalid filename_display_string"));
1125 /* Create and initialize the table S->line_charpos that records
1126 the positions of the lines in the source file, which is assumed
1127 to be open on descriptor DESC.
1128 All set S->nlines to the number of such lines. */
1131 find_source_lines (struct symtab
*s
, int desc
)
1136 int lines_allocated
= 1000;
1142 line_charpos
= XNEWVEC (int, lines_allocated
);
1143 if (fstat (desc
, &st
) < 0)
1144 perror_with_name (symtab_to_filename_for_display (s
));
1146 if (SYMTAB_OBJFILE (s
) != NULL
&& SYMTAB_OBJFILE (s
)->obfd
!= NULL
)
1147 mtime
= SYMTAB_OBJFILE (s
)->mtime
;
1149 mtime
= exec_bfd_mtime
;
1151 if (mtime
&& mtime
< st
.st_mtime
)
1152 warning (_("Source file is more recent than executable."));
1155 /* st_size might be a large type, but we only support source files whose
1156 size fits in an int. */
1157 size
= (int) st
.st_size
;
1159 /* Use the heap, not the stack, because this may be pretty large,
1160 and we may run into various kinds of limits on stack size. */
1161 gdb::def_vector
<char> data (size
);
1163 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1164 size
= myread (desc
, data
.data (), size
);
1166 perror_with_name (symtab_to_filename_for_display (s
));
1167 end
= data
.data () + size
;
1169 line_charpos
[0] = 0;
1174 /* A newline at the end does not start a new line. */
1177 if (nlines
== lines_allocated
)
1179 lines_allocated
*= 2;
1181 (int *) xrealloc ((char *) line_charpos
,
1182 sizeof (int) * lines_allocated
);
1184 line_charpos
[nlines
++] = p
- data
.data ();
1191 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1197 /* Get full pathname and line number positions for a symtab.
1198 Set *FULLNAME to actual name of the file as found by `openp',
1199 or to 0 if the file is not found. */
1202 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1204 scoped_fd desc
= open_source_file (s
);
1205 if (desc
.get () < 0)
1212 *fullname
= s
->fullname
;
1213 if (s
->line_charpos
== 0)
1214 find_source_lines (s
, desc
.get ());
1220 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1223 if (s
->line_charpos
== 0)
1224 get_filename_and_charpos (s
, (char **) NULL
);
1225 if (s
->fullname
== 0)
1227 if (line
> s
->nlines
)
1228 /* Don't index off the end of the line_charpos array. */
1230 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1231 mid_statement
, get_objfile_arch (SYMTAB_OBJFILE (s
)), pc
);
1233 current_source_line
= line
;
1234 current_source_symtab
= s
;
1235 clear_lines_listed_range ();
1240 /* Print source lines from the file of symtab S,
1241 starting with line number LINE and stopping before line number STOPLINE. */
1244 print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1245 print_source_lines_flags flags
)
1250 int nlines
= stopline
- line
;
1251 struct ui_out
*uiout
= current_uiout
;
1253 /* Regardless of whether we can open the file, set current_source_symtab. */
1254 current_source_symtab
= s
;
1255 current_source_line
= line
;
1256 first_line_listed
= line
;
1258 /* If printing of source lines is disabled, just print file and line
1260 if (uiout
->test_flags (ui_source_list
))
1262 /* Only prints "No such file or directory" once. */
1263 if ((s
!= last_source_visited
) || (!last_source_error
))
1265 last_source_visited
= s
;
1266 desc
= open_source_file (s
);
1267 if (desc
.get () < 0)
1269 last_source_error
= desc
.get ();
1275 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1281 flags
|= PRINT_SOURCE_LINES_NOERROR
;
1287 if (!(flags
& PRINT_SOURCE_LINES_NOERROR
))
1289 const char *filename
= symtab_to_filename_for_display (s
);
1290 int len
= strlen (filename
) + 100;
1291 char *name
= (char *) alloca (len
);
1293 xsnprintf (name
, len
, "%d\t%s", line
, filename
);
1294 print_sys_errmsg (name
, errno
);
1298 uiout
->field_int ("line", line
);
1299 uiout
->text ("\tin ");
1301 /* CLI expects only the "file" field. TUI expects only the
1302 "fullname" field (and TUI does break if "file" is printed).
1303 MI expects both fields. ui_source_list is set only for CLI,
1305 if (uiout
->is_mi_like_p () || uiout
->test_flags (ui_source_list
))
1306 uiout
->field_string ("file", symtab_to_filename_for_display (s
),
1307 ui_out_style_kind::FILE);
1308 if (uiout
->is_mi_like_p () || !uiout
->test_flags (ui_source_list
))
1310 const char *s_fullname
= symtab_to_fullname (s
);
1311 char *local_fullname
;
1313 /* ui_out_field_string may free S_FULLNAME by calling
1314 open_source_file for it again. See e.g.,
1315 tui_field_string->tui_show_source. */
1316 local_fullname
= (char *) alloca (strlen (s_fullname
) + 1);
1317 strcpy (local_fullname
, s_fullname
);
1319 uiout
->field_string ("fullname", local_fullname
);
1328 last_source_error
= 0;
1330 /* If the user requested a sequence of lines that seems to go backward
1331 (from high to low line numbers) then we don't print anything. */
1332 if (stopline
<= line
)
1336 if (!g_source_cache
.get_source_lines (s
, line
, stopline
- 1, &lines
))
1337 error (_("Line number %d out of range; %s has %d lines."),
1338 line
, symtab_to_filename_for_display (s
), s
->nlines
);
1340 const char *iter
= lines
.c_str ();
1341 while (nlines
-- > 0)
1348 last_line_listed
= current_source_line
;
1349 if (flags
& PRINT_SOURCE_LINES_FILENAME
)
1351 uiout
->text (symtab_to_filename_for_display (s
));
1354 xsnprintf (buf
, sizeof (buf
), "%d\t", current_source_line
++);
1358 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r' && c
!= '\033')
1360 xsnprintf (buf
, sizeof (buf
), "^%c", c
+ 0100);
1367 /* Skip a \r character, but only before a \n. */
1369 printf_filtered ("^%c", c
+ 0100);
1373 xsnprintf (buf
, sizeof (buf
), "%c", c
);
1377 while (c
!= '\n' && (c
= *iter
++) != '\0');
1381 if (!lines
.empty() && lines
.back () != '\n')
1389 print_source_lines (struct symtab
*s
, int line
, int stopline
,
1390 print_source_lines_flags flags
)
1392 print_source_lines_base (s
, line
, stopline
, flags
);
1398 print_source_lines (struct symtab
*s
, source_lines_range line_range
,
1399 print_source_lines_flags flags
)
1401 print_source_lines_base (s
, line_range
.startline (),
1402 line_range
.stopline (), flags
);
1407 /* Print info on range of pc's in a specified line. */
1410 info_line_command (const char *arg
, int from_tty
)
1412 CORE_ADDR start_pc
, end_pc
;
1414 std::vector
<symtab_and_line
> decoded_sals
;
1415 symtab_and_line curr_sal
;
1416 gdb::array_view
<symtab_and_line
> sals
;
1420 curr_sal
.symtab
= current_source_symtab
;
1421 curr_sal
.pspace
= current_program_space
;
1422 if (last_line_listed
!= 0)
1423 curr_sal
.line
= last_line_listed
;
1425 curr_sal
.line
= current_source_line
;
1431 decoded_sals
= decode_line_with_last_displayed (arg
,
1432 DECODE_LINE_LIST_MODE
);
1433 sals
= decoded_sals
;
1438 /* C++ More than one line may have been specified, as when the user
1439 specifies an overloaded function name. Print info on them all. */
1440 for (const auto &sal
: sals
)
1442 if (sal
.pspace
!= current_program_space
)
1445 if (sal
.symtab
== 0)
1447 struct gdbarch
*gdbarch
= get_current_arch ();
1449 printf_filtered (_("No line number information available"));
1452 /* This is useful for "info line *0x7f34". If we can't tell the
1453 user about a source line, at least let them have the symbolic
1455 printf_filtered (" for address ");
1457 print_address (gdbarch
, sal
.pc
, gdb_stdout
);
1460 printf_filtered (".");
1461 printf_filtered ("\n");
1463 else if (sal
.line
> 0
1464 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1466 struct gdbarch
*gdbarch
1467 = get_objfile_arch (SYMTAB_OBJFILE (sal
.symtab
));
1469 if (start_pc
== end_pc
)
1471 printf_filtered ("Line %d of \"%s\"",
1473 symtab_to_filename_for_display (sal
.symtab
));
1475 printf_filtered (" is at address ");
1476 print_address (gdbarch
, start_pc
, gdb_stdout
);
1478 printf_filtered (" but contains no code.\n");
1482 printf_filtered ("Line %d of \"%s\"",
1484 symtab_to_filename_for_display (sal
.symtab
));
1486 printf_filtered (" starts at address ");
1487 print_address (gdbarch
, start_pc
, gdb_stdout
);
1489 printf_filtered (" and ends at ");
1490 print_address (gdbarch
, end_pc
, gdb_stdout
);
1491 printf_filtered (".\n");
1494 /* x/i should display this line's code. */
1495 set_next_address (gdbarch
, start_pc
);
1497 /* Repeating "info line" should do the following line. */
1498 last_line_listed
= sal
.line
+ 1;
1500 /* If this is the only line, show the source code. If it could
1501 not find the file, don't do anything special. */
1502 if (annotation_level
&& sals
.size () == 1)
1503 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1506 /* Is there any case in which we get here, and have an address
1507 which the user would want to see? If we have debugging symbols
1508 and no line numbers? */
1509 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1510 sal
.line
, symtab_to_filename_for_display (sal
.symtab
));
1514 /* Commands to search the source file for a regexp. */
1516 /* Helper for forward_search_command/reverse_search_command. FORWARD
1517 indicates direction: true for forward, false for
1518 backward/reverse. */
1521 search_command_helper (const char *regex
, int from_tty
, bool forward
)
1523 const char *msg
= re_comp (regex
);
1525 error (("%s"), msg
);
1527 if (current_source_symtab
== 0)
1528 select_source_symtab (0);
1530 scoped_fd desc
= open_source_file (current_source_symtab
);
1531 if (desc
.get () < 0)
1532 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1534 if (current_source_symtab
->line_charpos
== 0)
1535 find_source_lines (current_source_symtab
, desc
.get ());
1538 ? last_line_listed
+ 1
1539 : last_line_listed
- 1);
1541 if (line
< 1 || line
> current_source_symtab
->nlines
)
1542 error (_("Expression not found"));
1544 if (lseek (desc
.get (), current_source_symtab
->line_charpos
[line
- 1], 0)
1546 perror_with_name (symtab_to_filename_for_display (current_source_symtab
));
1548 gdb_file_up stream
= desc
.to_file (FDOPEN_MODE
);
1549 clearerr (stream
.get ());
1551 gdb::def_vector
<char> buf
;
1558 int c
= fgetc (stream
.get ());
1565 while (c
!= '\n' && (c
= fgetc (stream
.get ())) >= 0);
1567 /* Remove the \r, if any, at the end of the line, otherwise
1568 regular expressions that end with $ or \n won't work. */
1569 size_t sz
= buf
.size ();
1570 if (sz
>= 2 && buf
[sz
- 2] == '\r')
1573 buf
.resize (sz
- 1);
1576 /* We now have a source line in buf, null terminate and match. */
1577 buf
.push_back ('\0');
1578 if (re_exec (buf
.data ()) > 0)
1581 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1582 set_internalvar_integer (lookup_internalvar ("_"), line
);
1583 current_source_line
= std::max (line
- lines_to_list
/ 2, 1);
1594 if (fseek (stream
.get (),
1595 current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1597 const char *filename
1598 = symtab_to_filename_for_display (current_source_symtab
);
1599 perror_with_name (filename
);
1604 printf_filtered (_("Expression not found\n"));
1608 forward_search_command (const char *regex
, int from_tty
)
1610 search_command_helper (regex
, from_tty
, true);
1614 reverse_search_command (const char *regex
, int from_tty
)
1616 search_command_helper (regex
, from_tty
, false);
1619 /* If the last character of PATH is a directory separator, then strip it. */
1622 strip_trailing_directory_separator (char *path
)
1624 const int last
= strlen (path
) - 1;
1627 return; /* No stripping is needed if PATH is the empty string. */
1629 if (IS_DIR_SEPARATOR (path
[last
]))
1633 /* Return the path substitution rule that matches FROM.
1634 Return NULL if no rule matches. */
1636 static struct substitute_path_rule
*
1637 find_substitute_path_rule (const char *from
)
1639 struct substitute_path_rule
*rule
= substitute_path_rules
;
1641 while (rule
!= NULL
)
1643 if (FILENAME_CMP (rule
->from
, from
) == 0)
1651 /* Add a new substitute-path rule at the end of the current list of rules.
1652 The new rule will replace FROM into TO. */
1655 add_substitute_path_rule (char *from
, char *to
)
1657 struct substitute_path_rule
*rule
;
1658 struct substitute_path_rule
*new_rule
= XNEW (struct substitute_path_rule
);
1660 new_rule
->from
= xstrdup (from
);
1661 new_rule
->to
= xstrdup (to
);
1662 new_rule
->next
= NULL
;
1664 /* If the list of rules are empty, then insert the new rule
1665 at the head of the list. */
1667 if (substitute_path_rules
== NULL
)
1669 substitute_path_rules
= new_rule
;
1673 /* Otherwise, skip to the last rule in our list and then append
1676 rule
= substitute_path_rules
;
1677 while (rule
->next
!= NULL
)
1680 rule
->next
= new_rule
;
1683 /* Remove the given source path substitution rule from the current list
1684 of rules. The memory allocated for that rule is also deallocated. */
1687 delete_substitute_path_rule (struct substitute_path_rule
*rule
)
1689 if (rule
== substitute_path_rules
)
1690 substitute_path_rules
= rule
->next
;
1693 struct substitute_path_rule
*prev
= substitute_path_rules
;
1695 while (prev
!= NULL
&& prev
->next
!= rule
)
1698 gdb_assert (prev
!= NULL
);
1700 prev
->next
= rule
->next
;
1708 /* Implement the "show substitute-path" command. */
1711 show_substitute_path_command (const char *args
, int from_tty
)
1713 struct substitute_path_rule
*rule
= substitute_path_rules
;
1716 gdb_argv
argv (args
);
1718 /* We expect zero or one argument. */
1720 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1721 error (_("Too many arguments in command"));
1723 if (argv
!= NULL
&& argv
[0] != NULL
)
1726 /* Print the substitution rules. */
1730 (_("Source path substitution rule matching `%s':\n"), from
);
1732 printf_filtered (_("List of all source path substitution rules:\n"));
1734 while (rule
!= NULL
)
1736 if (from
== NULL
|| substitute_path_rule_matches (rule
, from
) != 0)
1737 printf_filtered (" `%s' -> `%s'.\n", rule
->from
, rule
->to
);
1742 /* Implement the "unset substitute-path" command. */
1745 unset_substitute_path_command (const char *args
, int from_tty
)
1747 struct substitute_path_rule
*rule
= substitute_path_rules
;
1748 gdb_argv
argv (args
);
1752 /* This function takes either 0 or 1 argument. */
1754 if (argv
!= NULL
&& argv
[0] != NULL
&& argv
[1] != NULL
)
1755 error (_("Incorrect usage, too many arguments in command"));
1757 if (argv
!= NULL
&& argv
[0] != NULL
)
1760 /* If the user asked for all the rules to be deleted, ask him
1761 to confirm and give him a chance to abort before the action
1765 && !query (_("Delete all source path substitution rules? ")))
1766 error (_("Canceled"));
1768 /* Delete the rule matching the argument. No argument means that
1769 all rules should be deleted. */
1771 while (rule
!= NULL
)
1773 struct substitute_path_rule
*next
= rule
->next
;
1775 if (from
== NULL
|| FILENAME_CMP (from
, rule
->from
) == 0)
1777 delete_substitute_path_rule (rule
);
1784 /* If the user asked for a specific rule to be deleted but
1785 we could not find it, then report an error. */
1787 if (from
!= NULL
&& !rule_found
)
1788 error (_("No substitution rule defined for `%s'"), from
);
1790 forget_cached_source_info ();
1793 /* Add a new source path substitution rule. */
1796 set_substitute_path_command (const char *args
, int from_tty
)
1798 struct substitute_path_rule
*rule
;
1800 gdb_argv
argv (args
);
1802 if (argv
== NULL
|| argv
[0] == NULL
|| argv
[1] == NULL
)
1803 error (_("Incorrect usage, too few arguments in command"));
1805 if (argv
[2] != NULL
)
1806 error (_("Incorrect usage, too many arguments in command"));
1808 if (*(argv
[0]) == '\0')
1809 error (_("First argument must be at least one character long"));
1811 /* Strip any trailing directory separator character in either FROM
1812 or TO. The substitution rule already implicitly contains them. */
1813 strip_trailing_directory_separator (argv
[0]);
1814 strip_trailing_directory_separator (argv
[1]);
1816 /* If a rule with the same "from" was previously defined, then
1817 delete it. This new rule replaces it. */
1819 rule
= find_substitute_path_rule (argv
[0]);
1821 delete_substitute_path_rule (rule
);
1823 /* Insert the new substitution rule. */
1825 add_substitute_path_rule (argv
[0], argv
[1]);
1826 forget_cached_source_info ();
1831 source_lines_range::source_lines_range (int startline
,
1832 source_lines_range::direction dir
)
1834 if (dir
== source_lines_range::FORWARD
)
1836 LONGEST end
= static_cast <LONGEST
> (startline
) + get_lines_to_list ();
1841 m_startline
= startline
;
1842 m_stopline
= static_cast <int> (end
);
1846 LONGEST start
= static_cast <LONGEST
> (startline
) - get_lines_to_list ();
1851 m_startline
= static_cast <int> (start
);
1852 m_stopline
= startline
;
1858 _initialize_source (void)
1860 struct cmd_list_element
*c
;
1862 current_source_symtab
= 0;
1863 init_source_path ();
1865 /* The intention is to use POSIX Basic Regular Expressions.
1866 Always use the GNU regex routine for consistency across all hosts.
1867 Our current GNU regex.c does not have all the POSIX features, so this is
1868 just an approximation. */
1869 re_set_syntax (RE_SYNTAX_GREP
);
1871 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1872 Add directory DIR to beginning of search path for source files.\n\
1873 Forget cached info on source file locations and line positions.\n\
1874 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1875 directory in which the source file was compiled into object code.\n\
1876 With no argument, reset the search path to $cdir:$cwd, the default."),
1880 add_com_alias ("use", "directory", class_files
, 0);
1882 set_cmd_completer (c
, filename_completer
);
1884 add_setshow_optional_filename_cmd ("directories",
1888 Set the search path for finding source files."),
1890 Show the search path for finding source files."),
1892 $cwd in the path means the current working directory.\n\
1893 $cdir in the path means the compilation directory of the source file.\n\
1894 GDB ensures the search path always ends with $cdir:$cwd by\n\
1895 appending these directories if necessary.\n\
1896 Setting the value to an empty string sets it to $cdir:$cwd, the default."),
1897 set_directories_command
,
1898 show_directories_command
,
1899 &setlist
, &showlist
);
1901 add_info ("source", info_source_command
,
1902 _("Information about the current source file."));
1904 add_info ("line", info_line_command
, _("\
1905 Core addresses of the code for a source line.\n\
1906 Line can be specified as\n\
1907 LINENUM, to list around that line in current file,\n\
1908 FILE:LINENUM, to list around that line in that file,\n\
1909 FUNCTION, to list around beginning of that function,\n\
1910 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1911 Default is to describe the last source line that was listed.\n\n\
1912 This sets the default address for \"x\" to the line's first instruction\n\
1913 so that \"x/i\" suffices to start examining the machine code.\n\
1914 The address is also stored as the value of \"$_\"."));
1916 add_com ("forward-search", class_files
, forward_search_command
, _("\
1917 Search for regular expression (see regex(3)) from last line listed.\n\
1918 The matching line number is also stored as the value of \"$_\"."));
1919 add_com_alias ("search", "forward-search", class_files
, 0);
1920 add_com_alias ("fo", "forward-search", class_files
, 1);
1922 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1923 Search backward for regular expression (see regex(3)) from last line listed.\n\
1924 The matching line number is also stored as the value of \"$_\"."));
1925 add_com_alias ("rev", "reverse-search", class_files
, 1);
1927 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
1928 Set number of source lines gdb will list by default."), _("\
1929 Show number of source lines gdb will list by default."), _("\
1930 Use this to choose how many source lines the \"list\" displays (unless\n\
1931 the \"list\" argument explicitly specifies some other number).\n\
1932 A value of \"unlimited\", or zero, means there's no limit."),
1935 &setlist
, &showlist
);
1937 add_cmd ("substitute-path", class_files
, set_substitute_path_command
,
1939 Usage: set substitute-path FROM TO\n\
1940 Add a substitution rule replacing FROM into TO in source file names.\n\
1941 If a substitution rule was previously set for FROM, the old rule\n\
1942 is replaced by the new one."),
1945 add_cmd ("substitute-path", class_files
, unset_substitute_path_command
,
1947 Usage: unset substitute-path [FROM]\n\
1948 Delete the rule for substituting FROM in source file names. If FROM\n\
1949 is not specified, all substituting rules are deleted.\n\
1950 If the debugger cannot find a rule for FROM, it will display a warning."),
1953 add_cmd ("substitute-path", class_files
, show_substitute_path_command
,
1955 Usage: show substitute-path [FROM]\n\
1956 Print the rule for substituting FROM in source file names. If FROM\n\
1957 is not specified, print all substitution rules."),
1960 add_setshow_enum_cmd ("filename-display", class_files
,
1961 filename_display_kind_names
,
1962 &filename_display_string
, _("\
1963 Set how to display filenames."), _("\
1964 Show how to display filenames."), _("\
1965 filename-display can be:\n\
1966 basename - display only basename of a filename\n\
1967 relative - display a filename relative to the compilation directory\n\
1968 absolute - display an absolute filename\n\
1969 By default, relative filenames are displayed."),
1971 show_filename_display_string
,
1972 &setlist
, &showlist
);