1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
3 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
25 #include "expression.h"
33 #include <sys/types.h>
34 #include "gdb_string.h"
38 #include "gdb_regex.h"
44 #include "filenames.h" /* for DOSish file names */
45 #include "completer.h"
47 #include "readline/readline.h"
53 #define OPEN_MODE (O_RDONLY | O_BINARY)
54 #define FDOPEN_MODE FOPEN_RB
56 /* Prototypes for exported functions. */
58 void _initialize_source (void);
60 /* Prototypes for local functions. */
62 static int get_filename_and_charpos (struct symtab
*, char **);
64 static void reverse_search_command (char *, int);
66 static void forward_search_command (char *, int);
68 static void line_info (char *, int);
70 static void source_info (char *, int);
72 static void show_directories (char *, int);
74 /* Path of directories to search for source files.
75 Same format as the PATH environment variable's value. */
79 /* Symtab of default file for listing lines of. */
81 static struct symtab
*current_source_symtab
;
83 /* Default next line to list. */
85 static int current_source_line
;
87 /* Default number of lines to print with commands like "list".
88 This is based on guessing how many long (i.e. more than chars_per_line
89 characters) lines there will be. To be completely correct, "list"
90 and friends should be rewritten to count characters and see where
91 things are wrapping, but that would be a fair amount of work. */
93 int lines_to_list
= 10;
95 show_lines_to_list (struct ui_file
*file
, int from_tty
,
96 struct cmd_list_element
*c
, const char *value
)
98 fprintf_filtered (file
, _("\
99 Number of source lines gdb will list by default is %s.\n"),
103 /* Line number of last line printed. Default for various commands.
104 current_source_line is usually, but not always, the same as this. */
106 static int last_line_listed
;
108 /* First line number listed by last listing command. */
110 static int first_line_listed
;
112 /* Saves the name of the last source file visited and a possible error code.
113 Used to prevent repeating annoying "No such file or directories" msgs */
115 static struct symtab
*last_source_visited
= NULL
;
116 static int last_source_error
= 0;
118 /* Return the first line listed by print_source_lines.
119 Used by command interpreters to request listing from
123 get_first_line_listed (void)
125 return first_line_listed
;
128 /* Return the default number of lines to print with commands like the
129 cli "list". The caller of print_source_lines must use this to
130 calculate the end line and use it in the call to print_source_lines
131 as it does not automatically use this value. */
134 get_lines_to_list (void)
136 return lines_to_list
;
139 /* Return the current source file for listing and next line to list.
140 NOTE: The returned sal pc and end fields are not valid. */
142 struct symtab_and_line
143 get_current_source_symtab_and_line (void)
145 struct symtab_and_line cursal
= { };
147 cursal
.symtab
= current_source_symtab
;
148 cursal
.line
= current_source_line
;
155 /* If the current source file for listing is not set, try and get a default.
156 Usually called before get_current_source_symtab_and_line() is called.
157 It may err out if a default cannot be determined.
158 We must be cautious about where it is called, as it can recurse as the
159 process of determining a new default may call the caller!
160 Use get_current_source_symtab_and_line only to get whatever
161 we have without erroring out or trying to get a default. */
164 set_default_source_symtab_and_line (void)
166 struct symtab_and_line cursal
;
168 if (!have_full_symbols () && !have_partial_symbols ())
169 error (_("No symbol table is loaded. Use the \"file\" command."));
171 /* Pull in a current source symtab if necessary */
172 if (current_source_symtab
== 0)
173 select_source_symtab (0);
176 /* Return the current default file for listing and next line to list
177 (the returned sal pc and end fields are not valid.)
178 and set the current default to whatever is in SAL.
179 NOTE: The returned sal pc and end fields are not valid. */
181 struct symtab_and_line
182 set_current_source_symtab_and_line (const struct symtab_and_line
*sal
)
184 struct symtab_and_line cursal
= { };
186 cursal
.symtab
= current_source_symtab
;
187 cursal
.line
= current_source_line
;
189 current_source_symtab
= sal
->symtab
;
190 current_source_line
= sal
->line
;
197 /* Reset any information stored about a default file and line to print. */
200 clear_current_source_symtab_and_line (void)
202 current_source_symtab
= 0;
203 current_source_line
= 0;
206 /* Set the source file default for the "list" command to be S.
208 If S is NULL, and we don't have a default, find one. This
209 should only be called when the user actually tries to use the
210 default, since we produce an error if we can't find a reasonable
211 default. Also, since this can cause symbols to be read, doing it
212 before we need to would make things slower than necessary. */
215 select_source_symtab (struct symtab
*s
)
217 struct symtabs_and_lines sals
;
218 struct symtab_and_line sal
;
219 struct partial_symtab
*ps
;
220 struct partial_symtab
*cs_pst
= 0;
225 current_source_symtab
= s
;
226 current_source_line
= 1;
230 if (current_source_symtab
)
233 /* Make the default place to list be the function `main'
235 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0, NULL
))
237 sals
= decode_line_spec (main_name (), 1);
240 current_source_symtab
= sal
.symtab
;
241 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
242 if (current_source_symtab
)
246 /* All right; find the last file in the symtab list (ignoring .h's). */
248 current_source_line
= 1;
250 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
252 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
254 char *name
= s
->filename
;
255 int len
= strlen (name
);
256 if (!(len
> 2 && (DEPRECATED_STREQ (&name
[len
- 2], ".h"))))
258 current_source_symtab
= s
;
262 if (current_source_symtab
)
265 /* Howabout the partial symbol tables? */
267 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
269 for (ps
= ofp
->psymtabs
; ps
!= NULL
; ps
= ps
->next
)
271 char *name
= ps
->filename
;
272 int len
= strlen (name
);
273 if (!(len
> 2 && (DEPRECATED_STREQ (&name
[len
- 2], ".h"))))
283 internal_error (__FILE__
, __LINE__
,
284 _("select_source_symtab: "
285 "readin pst found and no symtabs."));
289 current_source_symtab
= PSYMTAB_TO_SYMTAB (cs_pst
);
292 if (current_source_symtab
)
295 error (_("Can't find a default source file"));
299 show_directories (char *ignore
, int from_tty
)
301 puts_filtered ("Source directories searched: ");
302 puts_filtered (source_path
);
303 puts_filtered ("\n");
306 /* Forget what we learned about line positions in source files, and
307 which directories contain them; must check again now since files
308 may be found in a different directory now. */
311 forget_cached_source_info (void)
314 struct objfile
*objfile
;
315 struct partial_symtab
*pst
;
317 for (objfile
= object_files
; objfile
!= NULL
; objfile
= objfile
->next
)
319 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
321 if (s
->line_charpos
!= NULL
)
323 xfree (s
->line_charpos
);
324 s
->line_charpos
= NULL
;
326 if (s
->fullname
!= NULL
)
333 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
335 if (pst
->fullname
!= NULL
)
337 xfree (pst
->fullname
);
338 pst
->fullname
= NULL
;
345 init_source_path (void)
349 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
350 source_path
= xstrdup (buf
);
351 forget_cached_source_info ();
355 init_last_source_visited (void)
357 last_source_visited
= NULL
;
360 /* Add zero or more directories to the front of the source path. */
363 directory_command (char *dirname
, int from_tty
)
366 /* FIXME, this goes to "delete dir"... */
369 if (from_tty
&& query (_("Reinitialize source path to empty? ")))
377 mod_path (dirname
, &source_path
);
378 last_source_visited
= NULL
;
381 show_directories ((char *) 0, from_tty
);
382 forget_cached_source_info ();
385 /* Add zero or more directories to the front of an arbitrary path. */
388 mod_path (char *dirname
, char **which_path
)
390 add_path (dirname
, which_path
, 1);
393 /* Workhorse of mod_path. Takes an extra argument to determine
394 if dirname should be parsed for separators that indicate multiple
395 directories. This allows for interfaces that pre-parse the dirname
396 and allow specification of traditional separator characters such
400 add_path (char *dirname
, char **which_path
, int parse_separators
)
402 char *old
= *which_path
;
408 dirname
= xstrdup (dirname
);
409 make_cleanup (xfree
, dirname
);
413 char *name
= dirname
;
418 char *separator
= NULL
;
422 if (parse_separators
)
424 separator
= strchr (name
, DIRNAME_SEPARATOR
);
425 space
= strchr (name
, ' ');
426 tab
= strchr (name
, '\t');
429 if (separator
== 0 && space
== 0 && tab
== 0)
430 p
= dirname
= name
+ strlen (name
);
434 if (separator
!= 0 && (p
== 0 || separator
< p
))
436 if (space
!= 0 && (p
== 0 || space
< p
))
438 if (tab
!= 0 && (p
== 0 || tab
< p
))
441 while (*dirname
== DIRNAME_SEPARATOR
448 if (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
449 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
450 /* On MS-DOS and MS-Windows, h:\ is different from h: */
451 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
453 && IS_DIR_SEPARATOR (p
[-1]))
454 /* Sigh. "foo/" => "foo" */
458 while (p
> name
&& p
[-1] == '.')
462 /* "." => getwd (). */
463 name
= current_directory
;
466 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
476 /* "...foo/." => "...foo". */
487 name
= tilde_expand (name
);
488 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
489 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
490 name
= concat (name
, ".", (char *)NULL
);
492 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
493 name
= concat (current_directory
, SLASH_STRING
, name
, (char *)NULL
);
495 name
= savestring (name
, p
- name
);
496 make_cleanup (xfree
, name
);
498 /* Unless it's a variable, check existence. */
501 /* These are warnings, not errors, since we don't want a
502 non-existent directory in a .gdbinit file to stop processing
503 of the .gdbinit file.
505 Whether they get added to the path is more debatable. Current
506 answer is yes, in case the user wants to go make the directory
507 or whatever. If the directory continues to not exist/not be
508 a directory/etc, then having them in the path should be
510 if (stat (name
, &st
) < 0)
512 int save_errno
= errno
;
513 fprintf_unfiltered (gdb_stderr
, "Warning: ");
514 print_sys_errmsg (name
, save_errno
);
516 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
517 warning (_("%s is not a directory."), name
);
522 unsigned int len
= strlen (name
);
527 /* FIXME: strncmp loses in interesting ways on MS-DOS and
528 MS-Windows because of case-insensitivity and two different
529 but functionally identical slash characters. We need a
530 special filesystem-dependent file-name comparison function.
532 Actually, even on Unix I would use realpath() or its work-
533 alike before comparing. Then all the code above which
534 removes excess slashes and dots could simply go away. */
535 if (!strncmp (p
, name
, len
)
536 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
538 /* Found it in the search path, remove old copy */
540 p
--; /* Back over leading separator */
541 if (prefix
> p
- *which_path
)
542 goto skip_dup
; /* Same dir twice in one cmd */
543 strcpy (p
, &p
[len
+ 1]); /* Copy from next \0 or : */
545 p
= strchr (p
, DIRNAME_SEPARATOR
);
555 tinybuf
[0] = DIRNAME_SEPARATOR
;
558 /* If we have already tacked on a name(s) in this command, be sure they stay
559 on the front as we tack on some more. */
566 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
568 *which_path
= concat (temp
, "", &old
[prefix
], (char *)NULL
);
569 prefix
= strlen (temp
);
574 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
576 prefix
= strlen (name
);
584 while (*dirname
!= '\0');
589 source_info (char *ignore
, int from_tty
)
591 struct symtab
*s
= current_source_symtab
;
595 printf_filtered (_("No current source file.\n"));
598 printf_filtered (_("Current source file is %s\n"), s
->filename
);
600 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
602 printf_filtered (_("Located in %s\n"), s
->fullname
);
604 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
605 s
->nlines
== 1 ? "" : "s");
607 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
608 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
609 printf_filtered (_("%s preprocessor macro info.\n"),
610 s
->macro_table
? "Includes" : "Does not include");
614 /* Return True if the file NAME exists and is a regular file */
616 is_regular_file (const char *name
)
619 const int status
= stat (name
, &st
);
621 /* Stat should never fail except when the file does not exist.
622 If stat fails, analyze the source of error and return True
623 unless the file does not exist, to avoid returning false results
624 on obscure systems where stat does not work as expected.
627 return (errno
!= ENOENT
);
629 return S_ISREG (st
.st_mode
);
632 /* Open a file named STRING, searching path PATH (dir names sep by some char)
633 using mode MODE and protection bits PROT in the calls to open.
635 OPTS specifies the function behaviour in specific cases.
637 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
638 (ie pretend the first element of PATH is "."). This also indicates
639 that a slash in STRING disables searching of the path (this is
640 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
641 get that particular version of foo or an error message).
643 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
644 searched in path (we usually want this for source files but not for
647 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
648 the actual file opened (this string will always start with a "/"). We
649 have to take special pains to avoid doubling the "/" between the directory
650 and the file, sigh! Emacs gets confuzzed by this when we print the
653 If a file is found, return the descriptor.
654 Otherwise, return -1, with errno set for the last name we tried to open. */
656 /* >>>> This should only allow files of certain types,
657 >>>> eg executable, non-directory */
659 openp (const char *path
, int opts
, const char *string
,
661 char **filename_opened
)
675 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
679 if (is_regular_file (string
))
681 filename
= alloca (strlen (string
) + 1);
682 strcpy (filename
, string
);
683 fd
= open (filename
, mode
, prot
);
693 if (!(opts
& OPF_SEARCH_IN_PATH
))
694 for (i
= 0; string
[i
]; i
++)
695 if (IS_DIR_SEPARATOR (string
[i
]))
699 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
700 while (IS_DIR_SEPARATOR(string
[0]))
704 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
707 alloclen
= strlen (path
) + strlen (string
) + 2;
708 filename
= alloca (alloclen
);
710 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
712 p1
= strchr (p
, DIRNAME_SEPARATOR
);
718 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
719 && p
[2] == 'w' && p
[3] == 'd')
721 /* Name is $cwd -- insert current directory name instead. */
724 /* First, realloc the filename buffer if too short. */
725 len
= strlen (current_directory
);
726 newlen
= len
+ strlen (string
) + 2;
727 if (newlen
> alloclen
)
730 filename
= alloca (alloclen
);
732 strcpy (filename
, current_directory
);
736 /* Normal file name in path -- just use it. */
737 strncpy (filename
, p
, len
);
741 /* Remove trailing slashes */
742 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
745 strcat (filename
+ len
, SLASH_STRING
);
746 strcat (filename
, string
);
748 if (is_regular_file (filename
))
750 fd
= open (filename
, mode
);
759 /* If a file was opened, canonicalize its filename. Use xfullpath
760 rather than gdb_realpath to avoid resolving the basename part
761 of filenames when the associated file is a symbolic link. This
762 fixes a potential inconsistency between the filenames known to
763 GDB and the filenames it prints in the annotations. */
765 *filename_opened
= NULL
;
766 else if (IS_ABSOLUTE_PATH (filename
))
767 *filename_opened
= xfullpath (filename
);
770 /* Beware the // my son, the Emacs barfs, the botch that catch... */
772 char *f
= concat (current_directory
,
773 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
775 filename
, (char *)NULL
);
776 *filename_opened
= xfullpath (f
);
785 /* This is essentially a convenience, for clients that want the behaviour
786 of openp, using source_path, but that really don't want the file to be
787 opened but want instead just to know what the full pathname is (as
788 qualified against source_path).
790 The current working directory is searched first.
792 If the file was found, this function returns 1, and FULL_PATHNAME is
793 set to the fully-qualified pathname.
795 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
797 source_full_path_of (char *filename
, char **full_pathname
)
801 fd
= openp (source_path
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
802 O_RDONLY
, 0, full_pathname
);
805 *full_pathname
= NULL
;
813 /* This function is capable of finding the absolute path to a
814 source file, and opening it, provided you give it an
815 OBJFILE and FILENAME. Both the DIRNAME and FULLNAME are only
816 added suggestions on where to find the file.
818 OBJFILE should be the objfile associated with a psymtab or symtab.
819 FILENAME should be the filename to open.
820 DIRNAME is the compilation directory of a particular source file.
821 Only some debug formats provide this info.
822 FULLNAME can be the last known absolute path to the file in question.
825 A valid file descriptor is returned. ( the return value is positive )
826 FULLNAME is set to the absolute path to the file just opened.
829 A non valid file descriptor is returned. ( the return value is negitive )
830 FULLNAME is set to NULL. */
832 find_and_open_source (struct objfile
*objfile
,
833 const char *filename
,
837 char *path
= source_path
;
841 /* Quick way out if we already know its full name */
844 result
= open (*fullname
, OPEN_MODE
);
847 /* Didn't work -- free old one, try again. */
854 /* Replace a path entry of $cdir with the compilation directory name */
856 /* We cast strstr's result in case an ANSIhole has made it const,
857 which produces a "required warning" when assigned to a nonconst. */
858 p
= (char *) strstr (source_path
, "$cdir");
859 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
860 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
865 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
866 len
= p
- source_path
;
867 strncpy (path
, source_path
, len
); /* Before $cdir */
868 strcpy (path
+ len
, dirname
); /* new stuff */
869 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
873 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, 0, fullname
);
876 /* Didn't work. Try using just the basename. */
877 p
= lbasename (filename
);
879 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, 0, fullname
);
885 tmp_fullname
= *fullname
;
886 *fullname
= xstrdup (tmp_fullname
);
887 xfree (tmp_fullname
);
892 /* Open a source file given a symtab S. Returns a file descriptor or
893 negative number for error.
895 This function is a convience function to find_and_open_source. */
898 open_source_file (struct symtab
*s
)
903 return find_and_open_source (s
->objfile
, s
->filename
, s
->dirname
,
907 /* Finds the fullname that a symtab represents.
909 If this functions finds the fullname, it will save it in ps->fullname
910 and it will also return the value.
912 If this function fails to find the file that this symtab represents,
913 NULL will be returned and ps->fullname will be set to NULL. */
915 symtab_to_fullname (struct symtab
*s
)
922 /* Don't check s->fullname here, the file could have been
923 deleted/moved/..., look for it again */
924 r
= find_and_open_source (s
->objfile
, s
->filename
, s
->dirname
,
936 /* Finds the fullname that a partial_symtab represents.
938 If this functions finds the fullname, it will save it in ps->fullname
939 and it will also return the value.
941 If this function fails to find the file that this partial_symtab represents,
942 NULL will be returned and ps->fullname will be set to NULL. */
944 psymtab_to_fullname (struct partial_symtab
*ps
)
951 /* Don't check ps->fullname here, the file could have been
952 deleted/moved/..., look for it again */
953 r
= find_and_open_source (ps
->objfile
, ps
->filename
, ps
->dirname
,
965 /* Create and initialize the table S->line_charpos that records
966 the positions of the lines in the source file, which is assumed
967 to be open on descriptor DESC.
968 All set S->nlines to the number of such lines. */
971 find_source_lines (struct symtab
*s
, int desc
)
974 char *data
, *p
, *end
;
976 int lines_allocated
= 1000;
981 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
982 if (fstat (desc
, &st
) < 0)
983 perror_with_name (s
->filename
);
985 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
986 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
988 mtime
= bfd_get_mtime (exec_bfd
);
990 if (mtime
&& mtime
< st
.st_mtime
)
991 warning (_("Source file is more recent than executable."));
993 #ifdef LSEEK_NOT_LINEAR
997 /* Have to read it byte by byte to find out where the chars live */
999 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
1001 while (myread (desc
, &c
, 1) > 0)
1005 if (nlines
== lines_allocated
)
1007 lines_allocated
*= 2;
1009 (int *) xrealloc ((char *) line_charpos
,
1010 sizeof (int) * lines_allocated
);
1012 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
1016 #else /* lseek linear. */
1018 struct cleanup
*old_cleanups
;
1020 /* st_size might be a large type, but we only support source files whose
1021 size fits in an int. */
1022 size
= (int) st
.st_size
;
1024 /* Use malloc, not alloca, because this may be pretty large, and we may
1025 run into various kinds of limits on stack size. */
1026 data
= (char *) xmalloc (size
);
1027 old_cleanups
= make_cleanup (xfree
, data
);
1029 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1030 size
= myread (desc
, data
, size
);
1032 perror_with_name (s
->filename
);
1035 line_charpos
[0] = 0;
1040 /* A newline at the end does not start a new line. */
1043 if (nlines
== lines_allocated
)
1045 lines_allocated
*= 2;
1047 (int *) xrealloc ((char *) line_charpos
,
1048 sizeof (int) * lines_allocated
);
1050 line_charpos
[nlines
++] = p
- data
;
1053 do_cleanups (old_cleanups
);
1055 #endif /* lseek linear. */
1058 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1062 /* Return the character position of a line LINE in symtab S.
1063 Return 0 if anything is invalid. */
1065 #if 0 /* Currently unused */
1068 source_line_charpos (struct symtab
*s
, int line
)
1072 if (!s
->line_charpos
|| line
<= 0)
1074 if (line
> s
->nlines
)
1076 return s
->line_charpos
[line
- 1];
1079 /* Return the line number of character position POS in symtab S. */
1082 source_charpos_line (struct symtab
*s
, int chr
)
1087 if (s
== 0 || s
->line_charpos
== 0)
1089 lnp
= s
->line_charpos
;
1090 /* Files are usually short, so sequential search is Ok */
1091 while (line
< s
->nlines
&& *lnp
<= chr
)
1096 if (line
>= s
->nlines
)
1104 /* Get full pathname and line number positions for a symtab.
1105 Return nonzero if line numbers may have changed.
1106 Set *FULLNAME to actual name of the file as found by `openp',
1107 or to 0 if the file is not found. */
1110 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1112 int desc
, linenums_changed
= 0;
1114 desc
= open_source_file (s
);
1122 *fullname
= s
->fullname
;
1123 if (s
->line_charpos
== 0)
1124 linenums_changed
= 1;
1125 if (linenums_changed
)
1126 find_source_lines (s
, desc
);
1128 return linenums_changed
;
1131 /* Print text describing the full name of the source file S
1132 and the line number LINE and its corresponding character position.
1133 The text starts with two Ctrl-z so that the Emacs-GDB interface
1136 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1138 Return 1 if successful, 0 if could not find the file. */
1141 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1144 if (s
->line_charpos
== 0)
1145 get_filename_and_charpos (s
, (char **) NULL
);
1146 if (s
->fullname
== 0)
1148 if (line
> s
->nlines
)
1149 /* Don't index off the end of the line_charpos array. */
1151 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1154 current_source_line
= line
;
1155 first_line_listed
= line
;
1156 last_line_listed
= line
;
1157 current_source_symtab
= s
;
1162 /* Print source lines from the file of symtab S,
1163 starting with line number LINE and stopping before line number STOPLINE. */
1165 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1168 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1173 int nlines
= stopline
- line
;
1175 /* Regardless of whether we can open the file, set current_source_symtab. */
1176 current_source_symtab
= s
;
1177 current_source_line
= line
;
1178 first_line_listed
= line
;
1180 /* If printing of source lines is disabled, just print file and line number */
1181 if (ui_out_test_flags (uiout
, ui_source_list
))
1183 /* Only prints "No such file or directory" once */
1184 if ((s
!= last_source_visited
) || (!last_source_error
))
1186 last_source_visited
= s
;
1187 desc
= open_source_file (s
);
1191 desc
= last_source_error
;
1203 last_source_error
= desc
;
1207 char *name
= alloca (strlen (s
->filename
) + 100);
1208 sprintf (name
, "%d\t%s", line
, s
->filename
);
1209 print_sys_errmsg (name
, errno
);
1212 ui_out_field_int (uiout
, "line", line
);
1213 ui_out_text (uiout
, "\tin ");
1214 ui_out_field_string (uiout
, "file", s
->filename
);
1215 ui_out_text (uiout
, "\n");
1220 last_source_error
= 0;
1222 if (s
->line_charpos
== 0)
1223 find_source_lines (s
, desc
);
1225 if (line
< 1 || line
> s
->nlines
)
1228 error (_("Line number %d out of range; %s has %d lines."),
1229 line
, s
->filename
, s
->nlines
);
1232 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1235 perror_with_name (s
->filename
);
1238 stream
= fdopen (desc
, FDOPEN_MODE
);
1241 while (nlines
-- > 0)
1248 last_line_listed
= current_source_line
;
1249 sprintf (buf
, "%d\t", current_source_line
++);
1250 ui_out_text (uiout
, buf
);
1253 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1255 sprintf (buf
, "^%c", c
+ 0100);
1256 ui_out_text (uiout
, buf
);
1259 ui_out_text (uiout
, "^?");
1262 /* Skip a \r character, but only before a \n. */
1263 int c1
= fgetc (stream
);
1266 printf_filtered ("^%c", c
+ 0100);
1268 ungetc (c1
, stream
);
1272 sprintf (buf
, "%c", c
);
1273 ui_out_text (uiout
, buf
);
1276 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1282 /* Show source lines from the file of symtab S, starting with line
1283 number LINE and stopping before line number STOPLINE. If this is the
1284 not the command line version, then the source is shown in the source
1285 window otherwise it is simply printed */
1288 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1290 print_source_lines_base (s
, line
, stopline
, noerror
);
1293 /* Print info on range of pc's in a specified line. */
1296 line_info (char *arg
, int from_tty
)
1298 struct symtabs_and_lines sals
;
1299 struct symtab_and_line sal
;
1300 CORE_ADDR start_pc
, end_pc
;
1303 init_sal (&sal
); /* initialize to zeroes */
1307 sal
.symtab
= current_source_symtab
;
1308 sal
.line
= last_line_listed
;
1310 sals
.sals
= (struct symtab_and_line
*)
1311 xmalloc (sizeof (struct symtab_and_line
));
1316 sals
= decode_line_spec_1 (arg
, 0);
1321 /* C++ More than one line may have been specified, as when the user
1322 specifies an overloaded function name. Print info on them all. */
1323 for (i
= 0; i
< sals
.nelts
; i
++)
1327 if (sal
.symtab
== 0)
1329 printf_filtered (_("No line number information available"));
1332 /* This is useful for "info line *0x7f34". If we can't tell the
1333 user about a source line, at least let them have the symbolic
1335 printf_filtered (" for address ");
1337 print_address (sal
.pc
, gdb_stdout
);
1340 printf_filtered (".");
1341 printf_filtered ("\n");
1343 else if (sal
.line
> 0
1344 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1346 if (start_pc
== end_pc
)
1348 printf_filtered ("Line %d of \"%s\"",
1349 sal
.line
, sal
.symtab
->filename
);
1351 printf_filtered (" is at address ");
1352 print_address (start_pc
, gdb_stdout
);
1354 printf_filtered (" but contains no code.\n");
1358 printf_filtered ("Line %d of \"%s\"",
1359 sal
.line
, sal
.symtab
->filename
);
1361 printf_filtered (" starts at address ");
1362 print_address (start_pc
, gdb_stdout
);
1364 printf_filtered (" and ends at ");
1365 print_address (end_pc
, gdb_stdout
);
1366 printf_filtered (".\n");
1369 /* x/i should display this line's code. */
1370 set_next_address (start_pc
);
1372 /* Repeating "info line" should do the following line. */
1373 last_line_listed
= sal
.line
+ 1;
1375 /* If this is the only line, show the source code. If it could
1376 not find the file, don't do anything special. */
1377 if (annotation_level
&& sals
.nelts
== 1)
1378 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1381 /* Is there any case in which we get here, and have an address
1382 which the user would want to see? If we have debugging symbols
1383 and no line numbers? */
1384 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1385 sal
.line
, sal
.symtab
->filename
);
1390 /* Commands to search the source file for a regexp. */
1393 forward_search_command (char *regex
, int from_tty
)
1401 line
= last_line_listed
+ 1;
1403 msg
= (char *) re_comp (regex
);
1405 error (("%s"), msg
);
1407 if (current_source_symtab
== 0)
1408 select_source_symtab (0);
1410 desc
= open_source_file (current_source_symtab
);
1412 perror_with_name (current_source_symtab
->filename
);
1414 if (current_source_symtab
->line_charpos
== 0)
1415 find_source_lines (current_source_symtab
, desc
);
1417 if (line
< 1 || line
> current_source_symtab
->nlines
)
1420 error (_("Expression not found"));
1423 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1426 perror_with_name (current_source_symtab
->filename
);
1429 stream
= fdopen (desc
, FDOPEN_MODE
);
1433 static char *buf
= NULL
;
1435 int cursize
, newsize
;
1438 buf
= xmalloc (cursize
);
1447 if (p
- buf
== cursize
)
1449 newsize
= cursize
+ cursize
/ 2;
1450 buf
= xrealloc (buf
, newsize
);
1455 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1457 /* Remove the \r, if any, at the end of the line, otherwise
1458 regular expressions that end with $ or \n won't work. */
1459 if (p
- buf
> 1 && p
[-2] == '\r')
1465 /* we now have a source line in buf, null terminate and match */
1467 if (re_exec (buf
) > 0)
1471 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1472 set_internalvar (lookup_internalvar ("_"),
1473 value_from_longest (builtin_type_int
,
1475 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1481 printf_filtered (_("Expression not found\n"));
1486 reverse_search_command (char *regex
, int from_tty
)
1494 line
= last_line_listed
- 1;
1496 msg
= (char *) re_comp (regex
);
1498 error (("%s"), msg
);
1500 if (current_source_symtab
== 0)
1501 select_source_symtab (0);
1503 desc
= open_source_file (current_source_symtab
);
1505 perror_with_name (current_source_symtab
->filename
);
1507 if (current_source_symtab
->line_charpos
== 0)
1508 find_source_lines (current_source_symtab
, desc
);
1510 if (line
< 1 || line
> current_source_symtab
->nlines
)
1513 error (_("Expression not found"));
1516 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1519 perror_with_name (current_source_symtab
->filename
);
1522 stream
= fdopen (desc
, FDOPEN_MODE
);
1526 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1527 char buf
[4096]; /* Should be reasonable??? */
1537 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1539 /* Remove the \r, if any, at the end of the line, otherwise
1540 regular expressions that end with $ or \n won't work. */
1541 if (p
- buf
> 1 && p
[-2] == '\r')
1547 /* We now have a source line in buf; null terminate and match. */
1549 if (re_exec (buf
) > 0)
1553 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1554 set_internalvar (lookup_internalvar ("_"),
1555 value_from_longest (builtin_type_int
,
1557 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1561 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1564 perror_with_name (current_source_symtab
->filename
);
1568 printf_filtered (_("Expression not found\n"));
1574 _initialize_source (void)
1576 struct cmd_list_element
*c
;
1577 current_source_symtab
= 0;
1578 init_source_path ();
1580 /* The intention is to use POSIX Basic Regular Expressions.
1581 Always use the GNU regex routine for consistency across all hosts.
1582 Our current GNU regex.c does not have all the POSIX features, so this is
1583 just an approximation. */
1584 re_set_syntax (RE_SYNTAX_GREP
);
1586 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1587 Add directory DIR to beginning of search path for source files.\n\
1588 Forget cached info on source file locations and line positions.\n\
1589 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1590 directory in which the source file was compiled into object code.\n\
1591 With no argument, reset the search path to $cdir:$cwd, the default."),
1595 add_com_alias ("use", "directory", class_files
, 0);
1597 set_cmd_completer (c
, filename_completer
);
1599 add_cmd ("directories", no_class
, show_directories
, _("\
1600 Current search path for finding source files.\n\
1601 $cwd in the path means the current working directory.\n\
1602 $cdir in the path means the compilation directory of the source file."),
1607 add_com_alias ("D", "directory", class_files
, 0);
1608 add_cmd ("ld", no_class
, show_directories
, _("\
1609 Current search path for finding source files.\n\
1610 $cwd in the path means the current working directory.\n\
1611 $cdir in the path means the compilation directory of the source file."),
1615 add_info ("source", source_info
,
1616 _("Information about the current source file."));
1618 add_info ("line", line_info
, _("\
1619 Core addresses of the code for a source line.\n\
1620 Line can be specified as\n\
1621 LINENUM, to list around that line in current file,\n\
1622 FILE:LINENUM, to list around that line in that file,\n\
1623 FUNCTION, to list around beginning of that function,\n\
1624 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1625 Default is to describe the last source line that was listed.\n\n\
1626 This sets the default address for \"x\" to the line's first instruction\n\
1627 so that \"x/i\" suffices to start examining the machine code.\n\
1628 The address is also stored as the value of \"$_\"."));
1630 add_com ("forward-search", class_files
, forward_search_command
, _("\
1631 Search for regular expression (see regex(3)) from last line listed.\n\
1632 The matching line number is also stored as the value of \"$_\"."));
1633 add_com_alias ("search", "forward-search", class_files
, 0);
1635 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1636 Search backward for regular expression (see regex(3)) from last line listed.\n\
1637 The matching line number is also stored as the value of \"$_\"."));
1641 add_com_alias ("/", "forward-search", class_files
, 0);
1642 add_com_alias ("?", "reverse-search", class_files
, 0);
1645 add_setshow_uinteger_cmd ("listsize", class_support
, &lines_to_list
, _("\
1646 Set number of source lines gdb will list by default."), _("\
1647 Show number of source lines gdb will list by default."), NULL
,
1650 &setlist
, &showlist
);
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