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
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 /* Line number of last line printed. Default for various commands.
96 current_source_line is usually, but not always, the same as this. */
98 static int last_line_listed
;
100 /* First line number listed by last listing command. */
102 static int first_line_listed
;
104 /* Saves the name of the last source file visited and a possible error code.
105 Used to prevent repeating annoying "No such file or directories" msgs */
107 static struct symtab
*last_source_visited
= NULL
;
108 static int last_source_error
= 0;
110 /* Return the first line listed by print_source_lines.
111 Used by command interpreters to request listing from
115 get_first_line_listed (void)
117 return first_line_listed
;
120 /* Return the default number of lines to print with commands like the
121 cli "list". The caller of print_source_lines must use this to
122 calculate the end line and use it in the call to print_source_lines
123 as it does not automatically use this value. */
126 get_lines_to_list (void)
128 return lines_to_list
;
131 /* Return the current source file for listing and next line to list.
132 NOTE: The returned sal pc and end fields are not valid. */
134 struct symtab_and_line
135 get_current_source_symtab_and_line (void)
137 struct symtab_and_line cursal
;
139 cursal
.symtab
= current_source_symtab
;
140 cursal
.line
= current_source_line
;
147 /* If the current source file for listing is not set, try and get a default.
148 Usually called before get_current_source_symtab_and_line() is called.
149 It may err out if a default cannot be determined.
150 We must be cautious about where it is called, as it can recurse as the
151 process of determining a new default may call the caller!
152 Use get_current_source_symtab_and_line only to get whatever
153 we have without erroring out or trying to get a default. */
156 set_default_source_symtab_and_line (void)
158 struct symtab_and_line cursal
;
160 if (!have_full_symbols () && !have_partial_symbols ())
161 error (_("No symbol table is loaded. Use the \"file\" command."));
163 /* Pull in a current source symtab if necessary */
164 if (current_source_symtab
== 0)
165 select_source_symtab (0);
168 /* Return the current default file for listing and next line to list
169 (the returned sal pc and end fields are not valid.)
170 and set the current default to whatever is in SAL.
171 NOTE: The returned sal pc and end fields are not valid. */
173 struct symtab_and_line
174 set_current_source_symtab_and_line (const struct symtab_and_line
*sal
)
176 struct symtab_and_line cursal
;
178 cursal
.symtab
= current_source_symtab
;
179 cursal
.line
= current_source_line
;
181 current_source_symtab
= sal
->symtab
;
182 current_source_line
= sal
->line
;
189 /* Reset any information stored about a default file and line to print. */
192 clear_current_source_symtab_and_line (void)
194 current_source_symtab
= 0;
195 current_source_line
= 0;
198 /* Set the source file default for the "list" command to be S.
200 If S is NULL, and we don't have a default, find one. This
201 should only be called when the user actually tries to use the
202 default, since we produce an error if we can't find a reasonable
203 default. Also, since this can cause symbols to be read, doing it
204 before we need to would make things slower than necessary. */
207 select_source_symtab (struct symtab
*s
)
209 struct symtabs_and_lines sals
;
210 struct symtab_and_line sal
;
211 struct partial_symtab
*ps
;
212 struct partial_symtab
*cs_pst
= 0;
217 current_source_symtab
= s
;
218 current_source_line
= 1;
222 if (current_source_symtab
)
225 /* Make the default place to list be the function `main'
227 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0, NULL
))
229 sals
= decode_line_spec (main_name (), 1);
232 current_source_symtab
= sal
.symtab
;
233 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
234 if (current_source_symtab
)
238 /* All right; find the last file in the symtab list (ignoring .h's). */
240 current_source_line
= 1;
242 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
244 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
246 char *name
= s
->filename
;
247 int len
= strlen (name
);
248 if (!(len
> 2 && (DEPRECATED_STREQ (&name
[len
- 2], ".h"))))
250 current_source_symtab
= s
;
254 if (current_source_symtab
)
257 /* Howabout the partial symbol tables? */
259 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
261 for (ps
= ofp
->psymtabs
; ps
!= NULL
; ps
= ps
->next
)
263 char *name
= ps
->filename
;
264 int len
= strlen (name
);
265 if (!(len
> 2 && (DEPRECATED_STREQ (&name
[len
- 2], ".h"))))
275 internal_error (__FILE__
, __LINE__
,
276 _("select_source_symtab: "
277 "readin pst found and no symtabs."));
281 current_source_symtab
= PSYMTAB_TO_SYMTAB (cs_pst
);
284 if (current_source_symtab
)
287 error (_("Can't find a default source file"));
291 show_directories (char *ignore
, int from_tty
)
293 puts_filtered ("Source directories searched: ");
294 puts_filtered (source_path
);
295 puts_filtered ("\n");
298 /* Forget what we learned about line positions in source files, and
299 which directories contain them; must check again now since files
300 may be found in a different directory now. */
303 forget_cached_source_info (void)
306 struct objfile
*objfile
;
307 struct partial_symtab
*pst
;
309 for (objfile
= object_files
; objfile
!= NULL
; objfile
= objfile
->next
)
311 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
313 if (s
->line_charpos
!= NULL
)
315 xfree (s
->line_charpos
);
316 s
->line_charpos
= NULL
;
318 if (s
->fullname
!= NULL
)
325 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
327 if (pst
->fullname
!= NULL
)
329 xfree (pst
->fullname
);
330 pst
->fullname
= NULL
;
337 init_source_path (void)
341 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
342 source_path
= xstrdup (buf
);
343 forget_cached_source_info ();
347 init_last_source_visited (void)
349 last_source_visited
= NULL
;
352 /* Add zero or more directories to the front of the source path. */
355 directory_command (char *dirname
, int from_tty
)
358 /* FIXME, this goes to "delete dir"... */
361 if (from_tty
&& query (_("Reinitialize source path to empty? ")))
369 mod_path (dirname
, &source_path
);
370 last_source_visited
= NULL
;
373 show_directories ((char *) 0, from_tty
);
374 forget_cached_source_info ();
377 /* Add zero or more directories to the front of an arbitrary path. */
380 mod_path (char *dirname
, char **which_path
)
382 add_path (dirname
, which_path
, 1);
385 /* Workhorse of mod_path. Takes an extra argument to determine
386 if dirname should be parsed for separators that indicate multiple
387 directories. This allows for interfaces that pre-parse the dirname
388 and allow specification of traditional separator characters such
392 add_path (char *dirname
, char **which_path
, int parse_separators
)
394 char *old
= *which_path
;
400 dirname
= xstrdup (dirname
);
401 make_cleanup (xfree
, dirname
);
405 char *name
= dirname
;
410 char *separator
= NULL
;
414 if (parse_separators
)
416 separator
= strchr (name
, DIRNAME_SEPARATOR
);
417 space
= strchr (name
, ' ');
418 tab
= strchr (name
, '\t');
421 if (separator
== 0 && space
== 0 && tab
== 0)
422 p
= dirname
= name
+ strlen (name
);
426 if (separator
!= 0 && (p
== 0 || separator
< p
))
428 if (space
!= 0 && (p
== 0 || space
< p
))
430 if (tab
!= 0 && (p
== 0 || tab
< p
))
433 while (*dirname
== DIRNAME_SEPARATOR
440 if (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
441 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
442 /* On MS-DOS and MS-Windows, h:\ is different from h: */
443 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
445 && IS_DIR_SEPARATOR (p
[-1]))
446 /* Sigh. "foo/" => "foo" */
450 while (p
> name
&& p
[-1] == '.')
454 /* "." => getwd (). */
455 name
= current_directory
;
458 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
468 /* "...foo/." => "...foo". */
479 name
= tilde_expand (name
);
480 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
481 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
482 name
= concat (name
, ".", NULL
);
484 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
485 name
= concat (current_directory
, SLASH_STRING
, name
, NULL
);
487 name
= savestring (name
, p
- name
);
488 make_cleanup (xfree
, name
);
490 /* Unless it's a variable, check existence. */
493 /* These are warnings, not errors, since we don't want a
494 non-existent directory in a .gdbinit file to stop processing
495 of the .gdbinit file.
497 Whether they get added to the path is more debatable. Current
498 answer is yes, in case the user wants to go make the directory
499 or whatever. If the directory continues to not exist/not be
500 a directory/etc, then having them in the path should be
502 if (stat (name
, &st
) < 0)
504 int save_errno
= errno
;
505 fprintf_unfiltered (gdb_stderr
, "Warning: ");
506 print_sys_errmsg (name
, save_errno
);
508 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
509 warning (_("%s is not a directory."), name
);
514 unsigned int len
= strlen (name
);
519 /* FIXME: strncmp loses in interesting ways on MS-DOS and
520 MS-Windows because of case-insensitivity and two different
521 but functionally identical slash characters. We need a
522 special filesystem-dependent file-name comparison function.
524 Actually, even on Unix I would use realpath() or its work-
525 alike before comparing. Then all the code above which
526 removes excess slashes and dots could simply go away. */
527 if (!strncmp (p
, name
, len
)
528 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
530 /* Found it in the search path, remove old copy */
532 p
--; /* Back over leading separator */
533 if (prefix
> p
- *which_path
)
534 goto skip_dup
; /* Same dir twice in one cmd */
535 strcpy (p
, &p
[len
+ 1]); /* Copy from next \0 or : */
537 p
= strchr (p
, DIRNAME_SEPARATOR
);
547 tinybuf
[0] = DIRNAME_SEPARATOR
;
550 /* If we have already tacked on a name(s) in this command, be sure they stay
551 on the front as we tack on some more. */
558 temp
= concat (old
, tinybuf
, name
, NULL
);
560 *which_path
= concat (temp
, "", &old
[prefix
], NULL
);
561 prefix
= strlen (temp
);
566 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
), old
, NULL
);
567 prefix
= strlen (name
);
575 while (*dirname
!= '\0');
580 source_info (char *ignore
, int from_tty
)
582 struct symtab
*s
= current_source_symtab
;
586 printf_filtered (_("No current source file.\n"));
589 printf_filtered (_("Current source file is %s\n"), s
->filename
);
591 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
593 printf_filtered (_("Located in %s\n"), s
->fullname
);
595 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
596 s
->nlines
== 1 ? "" : "s");
598 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
599 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
600 printf_filtered (_("%s preprocessor macro info.\n"),
601 s
->macro_table
? "Includes" : "Does not include");
605 /* Return True if the file NAME exists and is a regular file */
607 is_regular_file (const char *name
)
610 const int status
= stat (name
, &st
);
612 /* Stat should never fail except when the file does not exist.
613 If stat fails, analyze the source of error and return True
614 unless the file does not exist, to avoid returning false results
615 on obscure systems where stat does not work as expected.
618 return (errno
!= ENOENT
);
620 return S_ISREG (st
.st_mode
);
623 /* Open a file named STRING, searching path PATH (dir names sep by some char)
624 using mode MODE and protection bits PROT in the calls to open.
626 OPTS specifies the function behaviour in specific cases.
628 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
629 (ie pretend the first element of PATH is "."). This also indicates
630 that a slash in STRING disables searching of the path (this is
631 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
632 get that particular version of foo or an error message).
634 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
635 searched in path (we usually want this for source files but not for
638 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
639 the actual file opened (this string will always start with a "/"). We
640 have to take special pains to avoid doubling the "/" between the directory
641 and the file, sigh! Emacs gets confuzzed by this when we print the
644 If a file is found, return the descriptor.
645 Otherwise, return -1, with errno set for the last name we tried to open. */
647 /* >>>> This should only allow files of certain types,
648 >>>> eg executable, non-directory */
650 openp (const char *path
, int opts
, const char *string
,
652 char **filename_opened
)
666 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
670 if (is_regular_file (string
))
672 filename
= alloca (strlen (string
) + 1);
673 strcpy (filename
, string
);
674 fd
= open (filename
, mode
, prot
);
684 if (!(opts
& OPF_SEARCH_IN_PATH
))
685 for (i
= 0; string
[i
]; i
++)
686 if (IS_DIR_SEPARATOR (string
[i
]))
690 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
691 while (IS_DIR_SEPARATOR(string
[0]))
695 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
698 alloclen
= strlen (path
) + strlen (string
) + 2;
699 filename
= alloca (alloclen
);
701 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
703 p1
= strchr (p
, DIRNAME_SEPARATOR
);
709 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
710 && p
[2] == 'w' && p
[3] == 'd')
712 /* Name is $cwd -- insert current directory name instead. */
715 /* First, realloc the filename buffer if too short. */
716 len
= strlen (current_directory
);
717 newlen
= len
+ strlen (string
) + 2;
718 if (newlen
> alloclen
)
721 filename
= alloca (alloclen
);
723 strcpy (filename
, current_directory
);
727 /* Normal file name in path -- just use it. */
728 strncpy (filename
, p
, len
);
732 /* Remove trailing slashes */
733 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
736 strcat (filename
+ len
, SLASH_STRING
);
737 strcat (filename
, string
);
739 if (is_regular_file (filename
))
741 fd
= open (filename
, mode
);
750 /* If a file was opened, canonicalize its filename. Use xfullpath
751 rather than gdb_realpath to avoid resolving the basename part
752 of filenames when the associated file is a symbolic link. This
753 fixes a potential inconsistency between the filenames known to
754 GDB and the filenames it prints in the annotations. */
756 *filename_opened
= NULL
;
757 else if (IS_ABSOLUTE_PATH (filename
))
758 *filename_opened
= xfullpath (filename
);
761 /* Beware the // my son, the Emacs barfs, the botch that catch... */
763 char *f
= concat (current_directory
,
764 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
767 *filename_opened
= xfullpath (f
);
776 /* This is essentially a convenience, for clients that want the behaviour
777 of openp, using source_path, but that really don't want the file to be
778 opened but want instead just to know what the full pathname is (as
779 qualified against source_path).
781 The current working directory is searched first.
783 If the file was found, this function returns 1, and FULL_PATHNAME is
784 set to the fully-qualified pathname.
786 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
788 source_full_path_of (char *filename
, char **full_pathname
)
792 fd
= openp (source_path
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
793 O_RDONLY
, 0, full_pathname
);
796 *full_pathname
= NULL
;
804 /* This function is capable of finding the absolute path to a
805 source file, and opening it, provided you give it an
806 OBJFILE and FILENAME. Both the DIRNAME and FULLNAME are only
807 added suggestions on where to find the file.
809 OBJFILE should be the objfile associated with a psymtab or symtab.
810 FILENAME should be the filename to open.
811 DIRNAME is the compilation directory of a particular source file.
812 Only some debug formats provide this info.
813 FULLNAME can be the last known absolute path to the file in question.
816 A valid file descriptor is returned. ( the return value is positive )
817 FULLNAME is set to the absolute path to the file just opened.
820 A non valid file descriptor is returned. ( the return value is negitive )
821 FULLNAME is set to NULL. */
823 find_and_open_source (struct objfile
*objfile
,
824 const char *filename
,
828 char *path
= source_path
;
832 /* Quick way out if we already know its full name */
835 result
= open (*fullname
, OPEN_MODE
);
838 /* Didn't work -- free old one, try again. */
845 /* Replace a path entry of $cdir with the compilation directory name */
847 /* We cast strstr's result in case an ANSIhole has made it const,
848 which produces a "required warning" when assigned to a nonconst. */
849 p
= (char *) strstr (source_path
, "$cdir");
850 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
851 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
856 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
857 len
= p
- source_path
;
858 strncpy (path
, source_path
, len
); /* Before $cdir */
859 strcpy (path
+ len
, dirname
); /* new stuff */
860 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
864 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, 0, fullname
);
867 /* Didn't work. Try using just the basename. */
868 p
= lbasename (filename
);
870 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, 0, fullname
);
876 tmp_fullname
= *fullname
;
877 *fullname
= xstrdup (tmp_fullname
);
878 xfree (tmp_fullname
);
883 /* Open a source file given a symtab S. Returns a file descriptor or
884 negative number for error.
886 This function is a convience function to find_and_open_source. */
889 open_source_file (struct symtab
*s
)
894 return find_and_open_source (s
->objfile
, s
->filename
, s
->dirname
,
898 /* Finds the fullname that a symtab represents.
900 If this functions finds the fullname, it will save it in ps->fullname
901 and it will also return the value.
903 If this function fails to find the file that this symtab represents,
904 NULL will be returned and ps->fullname will be set to NULL. */
906 symtab_to_fullname (struct symtab
*s
)
913 /* Don't check s->fullname here, the file could have been
914 deleted/moved/..., look for it again */
915 r
= find_and_open_source (s
->objfile
, s
->filename
, s
->dirname
,
927 /* Finds the fullname that a partial_symtab represents.
929 If this functions finds the fullname, it will save it in ps->fullname
930 and it will also return the value.
932 If this function fails to find the file that this partial_symtab represents,
933 NULL will be returned and ps->fullname will be set to NULL. */
935 psymtab_to_fullname (struct partial_symtab
*ps
)
942 /* Don't check ps->fullname here, the file could have been
943 deleted/moved/..., look for it again */
944 r
= find_and_open_source (ps
->objfile
, ps
->filename
, ps
->dirname
,
956 /* Create and initialize the table S->line_charpos that records
957 the positions of the lines in the source file, which is assumed
958 to be open on descriptor DESC.
959 All set S->nlines to the number of such lines. */
962 find_source_lines (struct symtab
*s
, int desc
)
965 char *data
, *p
, *end
;
967 int lines_allocated
= 1000;
972 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
973 if (fstat (desc
, &st
) < 0)
974 perror_with_name (s
->filename
);
976 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
977 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
979 mtime
= bfd_get_mtime (exec_bfd
);
981 if (mtime
&& mtime
< st
.st_mtime
)
982 warning (_("Source file is more recent than executable."));
984 #ifdef LSEEK_NOT_LINEAR
988 /* Have to read it byte by byte to find out where the chars live */
990 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
992 while (myread (desc
, &c
, 1) > 0)
996 if (nlines
== lines_allocated
)
998 lines_allocated
*= 2;
1000 (int *) xrealloc ((char *) line_charpos
,
1001 sizeof (int) * lines_allocated
);
1003 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
1007 #else /* lseek linear. */
1009 struct cleanup
*old_cleanups
;
1011 /* st_size might be a large type, but we only support source files whose
1012 size fits in an int. */
1013 size
= (int) st
.st_size
;
1015 /* Use malloc, not alloca, because this may be pretty large, and we may
1016 run into various kinds of limits on stack size. */
1017 data
= (char *) xmalloc (size
);
1018 old_cleanups
= make_cleanup (xfree
, data
);
1020 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1021 size
= myread (desc
, data
, size
);
1023 perror_with_name (s
->filename
);
1026 line_charpos
[0] = 0;
1031 /* A newline at the end does not start a new line. */
1034 if (nlines
== lines_allocated
)
1036 lines_allocated
*= 2;
1038 (int *) xrealloc ((char *) line_charpos
,
1039 sizeof (int) * lines_allocated
);
1041 line_charpos
[nlines
++] = p
- data
;
1044 do_cleanups (old_cleanups
);
1046 #endif /* lseek linear. */
1049 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1053 /* Return the character position of a line LINE in symtab S.
1054 Return 0 if anything is invalid. */
1056 #if 0 /* Currently unused */
1059 source_line_charpos (struct symtab
*s
, int line
)
1063 if (!s
->line_charpos
|| line
<= 0)
1065 if (line
> s
->nlines
)
1067 return s
->line_charpos
[line
- 1];
1070 /* Return the line number of character position POS in symtab S. */
1073 source_charpos_line (struct symtab
*s
, int chr
)
1078 if (s
== 0 || s
->line_charpos
== 0)
1080 lnp
= s
->line_charpos
;
1081 /* Files are usually short, so sequential search is Ok */
1082 while (line
< s
->nlines
&& *lnp
<= chr
)
1087 if (line
>= s
->nlines
)
1095 /* Get full pathname and line number positions for a symtab.
1096 Return nonzero if line numbers may have changed.
1097 Set *FULLNAME to actual name of the file as found by `openp',
1098 or to 0 if the file is not found. */
1101 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1103 int desc
, linenums_changed
= 0;
1105 desc
= open_source_file (s
);
1113 *fullname
= s
->fullname
;
1114 if (s
->line_charpos
== 0)
1115 linenums_changed
= 1;
1116 if (linenums_changed
)
1117 find_source_lines (s
, desc
);
1119 return linenums_changed
;
1122 /* Print text describing the full name of the source file S
1123 and the line number LINE and its corresponding character position.
1124 The text starts with two Ctrl-z so that the Emacs-GDB interface
1127 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1129 Return 1 if successful, 0 if could not find the file. */
1132 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1135 if (s
->line_charpos
== 0)
1136 get_filename_and_charpos (s
, (char **) NULL
);
1137 if (s
->fullname
== 0)
1139 if (line
> s
->nlines
)
1140 /* Don't index off the end of the line_charpos array. */
1142 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1145 current_source_line
= line
;
1146 first_line_listed
= line
;
1147 last_line_listed
= line
;
1148 current_source_symtab
= s
;
1153 /* Print source lines from the file of symtab S,
1154 starting with line number LINE and stopping before line number STOPLINE. */
1156 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1159 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1164 int nlines
= stopline
- line
;
1166 /* Regardless of whether we can open the file, set current_source_symtab. */
1167 current_source_symtab
= s
;
1168 current_source_line
= line
;
1169 first_line_listed
= line
;
1171 /* If printing of source lines is disabled, just print file and line number */
1172 if (ui_out_test_flags (uiout
, ui_source_list
))
1174 /* Only prints "No such file or directory" once */
1175 if ((s
!= last_source_visited
) || (!last_source_error
))
1177 last_source_visited
= s
;
1178 desc
= open_source_file (s
);
1182 desc
= last_source_error
;
1194 last_source_error
= desc
;
1198 char *name
= alloca (strlen (s
->filename
) + 100);
1199 sprintf (name
, "%d\t%s", line
, s
->filename
);
1200 print_sys_errmsg (name
, errno
);
1203 ui_out_field_int (uiout
, "line", line
);
1204 ui_out_text (uiout
, "\tin ");
1205 ui_out_field_string (uiout
, "file", s
->filename
);
1206 ui_out_text (uiout
, "\n");
1211 last_source_error
= 0;
1213 if (s
->line_charpos
== 0)
1214 find_source_lines (s
, desc
);
1216 if (line
< 1 || line
> s
->nlines
)
1219 error (_("Line number %d out of range; %s has %d lines."),
1220 line
, s
->filename
, s
->nlines
);
1223 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1226 perror_with_name (s
->filename
);
1229 stream
= fdopen (desc
, FDOPEN_MODE
);
1232 while (nlines
-- > 0)
1239 last_line_listed
= current_source_line
;
1240 sprintf (buf
, "%d\t", current_source_line
++);
1241 ui_out_text (uiout
, buf
);
1244 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1246 sprintf (buf
, "^%c", c
+ 0100);
1247 ui_out_text (uiout
, buf
);
1250 ui_out_text (uiout
, "^?");
1253 /* Skip a \r character, but only before a \n. */
1254 int c1
= fgetc (stream
);
1257 printf_filtered ("^%c", c
+ 0100);
1259 ungetc (c1
, stream
);
1263 sprintf (buf
, "%c", c
);
1264 ui_out_text (uiout
, buf
);
1267 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1273 /* Show source lines from the file of symtab S, starting with line
1274 number LINE and stopping before line number STOPLINE. If this is the
1275 not the command line version, then the source is shown in the source
1276 window otherwise it is simply printed */
1279 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1281 print_source_lines_base (s
, line
, stopline
, noerror
);
1284 /* Print info on range of pc's in a specified line. */
1287 line_info (char *arg
, int from_tty
)
1289 struct symtabs_and_lines sals
;
1290 struct symtab_and_line sal
;
1291 CORE_ADDR start_pc
, end_pc
;
1294 init_sal (&sal
); /* initialize to zeroes */
1298 sal
.symtab
= current_source_symtab
;
1299 sal
.line
= last_line_listed
;
1301 sals
.sals
= (struct symtab_and_line
*)
1302 xmalloc (sizeof (struct symtab_and_line
));
1307 sals
= decode_line_spec_1 (arg
, 0);
1312 /* C++ More than one line may have been specified, as when the user
1313 specifies an overloaded function name. Print info on them all. */
1314 for (i
= 0; i
< sals
.nelts
; i
++)
1318 if (sal
.symtab
== 0)
1320 printf_filtered (_("No line number information available"));
1323 /* This is useful for "info line *0x7f34". If we can't tell the
1324 user about a source line, at least let them have the symbolic
1326 printf_filtered (" for address ");
1328 print_address (sal
.pc
, gdb_stdout
);
1331 printf_filtered (".");
1332 printf_filtered ("\n");
1334 else if (sal
.line
> 0
1335 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1337 if (start_pc
== end_pc
)
1339 printf_filtered ("Line %d of \"%s\"",
1340 sal
.line
, sal
.symtab
->filename
);
1342 printf_filtered (" is at address ");
1343 print_address (start_pc
, gdb_stdout
);
1345 printf_filtered (" but contains no code.\n");
1349 printf_filtered ("Line %d of \"%s\"",
1350 sal
.line
, sal
.symtab
->filename
);
1352 printf_filtered (" starts at address ");
1353 print_address (start_pc
, gdb_stdout
);
1355 printf_filtered (" and ends at ");
1356 print_address (end_pc
, gdb_stdout
);
1357 printf_filtered (".\n");
1360 /* x/i should display this line's code. */
1361 set_next_address (start_pc
);
1363 /* Repeating "info line" should do the following line. */
1364 last_line_listed
= sal
.line
+ 1;
1366 /* If this is the only line, show the source code. If it could
1367 not find the file, don't do anything special. */
1368 if (annotation_level
&& sals
.nelts
== 1)
1369 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1372 /* Is there any case in which we get here, and have an address
1373 which the user would want to see? If we have debugging symbols
1374 and no line numbers? */
1375 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1376 sal
.line
, sal
.symtab
->filename
);
1381 /* Commands to search the source file for a regexp. */
1384 forward_search_command (char *regex
, int from_tty
)
1392 line
= last_line_listed
+ 1;
1394 msg
= (char *) re_comp (regex
);
1396 error (("%s"), msg
);
1398 if (current_source_symtab
== 0)
1399 select_source_symtab (0);
1401 desc
= open_source_file (current_source_symtab
);
1403 perror_with_name (current_source_symtab
->filename
);
1405 if (current_source_symtab
->line_charpos
== 0)
1406 find_source_lines (current_source_symtab
, desc
);
1408 if (line
< 1 || line
> current_source_symtab
->nlines
)
1411 error (_("Expression not found"));
1414 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1417 perror_with_name (current_source_symtab
->filename
);
1420 stream
= fdopen (desc
, FDOPEN_MODE
);
1424 static char *buf
= NULL
;
1426 int cursize
, newsize
;
1429 buf
= xmalloc (cursize
);
1438 if (p
- buf
== cursize
)
1440 newsize
= cursize
+ cursize
/ 2;
1441 buf
= xrealloc (buf
, newsize
);
1446 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1448 /* Remove the \r, if any, at the end of the line, otherwise
1449 regular expressions that end with $ or \n won't work. */
1450 if (p
- buf
> 1 && p
[-2] == '\r')
1456 /* we now have a source line in buf, null terminate and match */
1458 if (re_exec (buf
) > 0)
1462 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1463 set_internalvar (lookup_internalvar ("_"),
1464 value_from_longest (builtin_type_int
,
1466 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1472 printf_filtered (_("Expression not found\n"));
1477 reverse_search_command (char *regex
, int from_tty
)
1485 line
= last_line_listed
- 1;
1487 msg
= (char *) re_comp (regex
);
1489 error (("%s"), msg
);
1491 if (current_source_symtab
== 0)
1492 select_source_symtab (0);
1494 desc
= open_source_file (current_source_symtab
);
1496 perror_with_name (current_source_symtab
->filename
);
1498 if (current_source_symtab
->line_charpos
== 0)
1499 find_source_lines (current_source_symtab
, desc
);
1501 if (line
< 1 || line
> current_source_symtab
->nlines
)
1504 error (_("Expression not found"));
1507 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1510 perror_with_name (current_source_symtab
->filename
);
1513 stream
= fdopen (desc
, FDOPEN_MODE
);
1517 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1518 char buf
[4096]; /* Should be reasonable??? */
1528 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1530 /* Remove the \r, if any, at the end of the line, otherwise
1531 regular expressions that end with $ or \n won't work. */
1532 if (p
- buf
> 1 && p
[-2] == '\r')
1538 /* We now have a source line in buf; null terminate and match. */
1540 if (re_exec (buf
) > 0)
1544 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1545 set_internalvar (lookup_internalvar ("_"),
1546 value_from_longest (builtin_type_int
,
1548 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1552 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1555 perror_with_name (current_source_symtab
->filename
);
1559 printf_filtered (_("Expression not found\n"));
1565 _initialize_source (void)
1567 struct cmd_list_element
*c
;
1568 current_source_symtab
= 0;
1569 init_source_path ();
1571 /* The intention is to use POSIX Basic Regular Expressions.
1572 Always use the GNU regex routine for consistency across all hosts.
1573 Our current GNU regex.c does not have all the POSIX features, so this is
1574 just an approximation. */
1575 re_set_syntax (RE_SYNTAX_GREP
);
1577 c
= add_cmd ("directory", class_files
, directory_command
,
1578 "Add directory DIR to beginning of search path for source files.\n\
1579 Forget cached info on source file locations and line positions.\n\
1580 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1581 directory in which the source file was compiled into object code.\n\
1582 With no argument, reset the search path to $cdir:$cwd, the default.",
1586 add_com_alias ("use", "directory", class_files
, 0);
1588 set_cmd_completer (c
, filename_completer
);
1590 add_cmd ("directories", no_class
, show_directories
,
1591 "Current search path for finding source files.\n\
1592 $cwd in the path means the current working directory.\n\
1593 $cdir in the path means the compilation directory of the source file.",
1598 add_com_alias ("D", "directory", class_files
, 0);
1599 add_cmd ("ld", 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 $cdir in the path means the compilation directory of the source file.",
1606 add_info ("source", source_info
,
1607 "Information about the current source file.");
1609 add_info ("line", line_info
,
1610 concat ("Core addresses of the code for a source line.\n\
1611 Line can be specified as\n\
1612 LINENUM, to list around that line in current file,\n\
1613 FILE:LINENUM, to list around that line in that file,\n\
1614 FUNCTION, to list around beginning of that function,\n\
1615 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1617 Default is to describe the last source line that was listed.\n\n\
1618 This sets the default address for \"x\" to the line's first instruction\n\
1619 so that \"x/i\" suffices to start examining the machine code.\n\
1620 The address is also stored as the value of \"$_\".", NULL
));
1622 add_com ("forward-search", class_files
, forward_search_command
,
1623 "Search for regular expression (see regex(3)) from last line listed.\n\
1624 The matching line number is also stored as the value of \"$_\".");
1625 add_com_alias ("search", "forward-search", class_files
, 0);
1627 add_com ("reverse-search", class_files
, reverse_search_command
,
1628 "Search backward for regular expression (see regex(3)) from last line listed.\n\
1629 The matching line number is also stored as the value of \"$_\".");
1633 add_com_alias ("/", "forward-search", class_files
, 0);
1634 add_com_alias ("?", "reverse-search", class_files
, 0);
1637 deprecated_add_show_from_set
1638 (add_set_cmd ("listsize", class_support
, var_uinteger
,
1639 (char *) &lines_to_list
,
1640 "Set number of source lines gdb will list by default.",