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 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
, ".", NULL
);
492 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
493 name
= concat (current_directory
, SLASH_STRING
, name
, 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
, NULL
);
568 *which_path
= concat (temp
, "", &old
[prefix
], NULL
);
569 prefix
= strlen (temp
);
574 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
), old
, NULL
);
575 prefix
= strlen (name
);
583 while (*dirname
!= '\0');
588 source_info (char *ignore
, int from_tty
)
590 struct symtab
*s
= current_source_symtab
;
594 printf_filtered (_("No current source file.\n"));
597 printf_filtered (_("Current source file is %s\n"), s
->filename
);
599 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
601 printf_filtered (_("Located in %s\n"), s
->fullname
);
603 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
604 s
->nlines
== 1 ? "" : "s");
606 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
607 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
608 printf_filtered (_("%s preprocessor macro info.\n"),
609 s
->macro_table
? "Includes" : "Does not include");
613 /* Return True if the file NAME exists and is a regular file */
615 is_regular_file (const char *name
)
618 const int status
= stat (name
, &st
);
620 /* Stat should never fail except when the file does not exist.
621 If stat fails, analyze the source of error and return True
622 unless the file does not exist, to avoid returning false results
623 on obscure systems where stat does not work as expected.
626 return (errno
!= ENOENT
);
628 return S_ISREG (st
.st_mode
);
631 /* Open a file named STRING, searching path PATH (dir names sep by some char)
632 using mode MODE and protection bits PROT in the calls to open.
634 OPTS specifies the function behaviour in specific cases.
636 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
637 (ie pretend the first element of PATH is "."). This also indicates
638 that a slash in STRING disables searching of the path (this is
639 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
640 get that particular version of foo or an error message).
642 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
643 searched in path (we usually want this for source files but not for
646 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
647 the actual file opened (this string will always start with a "/"). We
648 have to take special pains to avoid doubling the "/" between the directory
649 and the file, sigh! Emacs gets confuzzed by this when we print the
652 If a file is found, return the descriptor.
653 Otherwise, return -1, with errno set for the last name we tried to open. */
655 /* >>>> This should only allow files of certain types,
656 >>>> eg executable, non-directory */
658 openp (const char *path
, int opts
, const char *string
,
660 char **filename_opened
)
674 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
678 if (is_regular_file (string
))
680 filename
= alloca (strlen (string
) + 1);
681 strcpy (filename
, string
);
682 fd
= open (filename
, mode
, prot
);
692 if (!(opts
& OPF_SEARCH_IN_PATH
))
693 for (i
= 0; string
[i
]; i
++)
694 if (IS_DIR_SEPARATOR (string
[i
]))
698 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
699 while (IS_DIR_SEPARATOR(string
[0]))
703 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
706 alloclen
= strlen (path
) + strlen (string
) + 2;
707 filename
= alloca (alloclen
);
709 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
711 p1
= strchr (p
, DIRNAME_SEPARATOR
);
717 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
718 && p
[2] == 'w' && p
[3] == 'd')
720 /* Name is $cwd -- insert current directory name instead. */
723 /* First, realloc the filename buffer if too short. */
724 len
= strlen (current_directory
);
725 newlen
= len
+ strlen (string
) + 2;
726 if (newlen
> alloclen
)
729 filename
= alloca (alloclen
);
731 strcpy (filename
, current_directory
);
735 /* Normal file name in path -- just use it. */
736 strncpy (filename
, p
, len
);
740 /* Remove trailing slashes */
741 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
744 strcat (filename
+ len
, SLASH_STRING
);
745 strcat (filename
, string
);
747 if (is_regular_file (filename
))
749 fd
= open (filename
, mode
);
758 /* If a file was opened, canonicalize its filename. Use xfullpath
759 rather than gdb_realpath to avoid resolving the basename part
760 of filenames when the associated file is a symbolic link. This
761 fixes a potential inconsistency between the filenames known to
762 GDB and the filenames it prints in the annotations. */
764 *filename_opened
= NULL
;
765 else if (IS_ABSOLUTE_PATH (filename
))
766 *filename_opened
= xfullpath (filename
);
769 /* Beware the // my son, the Emacs barfs, the botch that catch... */
771 char *f
= concat (current_directory
,
772 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
775 *filename_opened
= xfullpath (f
);
784 /* This is essentially a convenience, for clients that want the behaviour
785 of openp, using source_path, but that really don't want the file to be
786 opened but want instead just to know what the full pathname is (as
787 qualified against source_path).
789 The current working directory is searched first.
791 If the file was found, this function returns 1, and FULL_PATHNAME is
792 set to the fully-qualified pathname.
794 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
796 source_full_path_of (char *filename
, char **full_pathname
)
800 fd
= openp (source_path
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
801 O_RDONLY
, 0, full_pathname
);
804 *full_pathname
= NULL
;
812 /* This function is capable of finding the absolute path to a
813 source file, and opening it, provided you give it an
814 OBJFILE and FILENAME. Both the DIRNAME and FULLNAME are only
815 added suggestions on where to find the file.
817 OBJFILE should be the objfile associated with a psymtab or symtab.
818 FILENAME should be the filename to open.
819 DIRNAME is the compilation directory of a particular source file.
820 Only some debug formats provide this info.
821 FULLNAME can be the last known absolute path to the file in question.
824 A valid file descriptor is returned. ( the return value is positive )
825 FULLNAME is set to the absolute path to the file just opened.
828 A non valid file descriptor is returned. ( the return value is negitive )
829 FULLNAME is set to NULL. */
831 find_and_open_source (struct objfile
*objfile
,
832 const char *filename
,
836 char *path
= source_path
;
840 /* Quick way out if we already know its full name */
843 result
= open (*fullname
, OPEN_MODE
);
846 /* Didn't work -- free old one, try again. */
853 /* Replace a path entry of $cdir with the compilation directory name */
855 /* We cast strstr's result in case an ANSIhole has made it const,
856 which produces a "required warning" when assigned to a nonconst. */
857 p
= (char *) strstr (source_path
, "$cdir");
858 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
859 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
864 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
865 len
= p
- source_path
;
866 strncpy (path
, source_path
, len
); /* Before $cdir */
867 strcpy (path
+ len
, dirname
); /* new stuff */
868 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
872 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, 0, fullname
);
875 /* Didn't work. Try using just the basename. */
876 p
= lbasename (filename
);
878 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, 0, fullname
);
884 tmp_fullname
= *fullname
;
885 *fullname
= xstrdup (tmp_fullname
);
886 xfree (tmp_fullname
);
891 /* Open a source file given a symtab S. Returns a file descriptor or
892 negative number for error.
894 This function is a convience function to find_and_open_source. */
897 open_source_file (struct symtab
*s
)
902 return find_and_open_source (s
->objfile
, s
->filename
, s
->dirname
,
906 /* Finds the fullname that a symtab represents.
908 If this functions finds the fullname, it will save it in ps->fullname
909 and it will also return the value.
911 If this function fails to find the file that this symtab represents,
912 NULL will be returned and ps->fullname will be set to NULL. */
914 symtab_to_fullname (struct symtab
*s
)
921 /* Don't check s->fullname here, the file could have been
922 deleted/moved/..., look for it again */
923 r
= find_and_open_source (s
->objfile
, s
->filename
, s
->dirname
,
935 /* Finds the fullname that a partial_symtab represents.
937 If this functions finds the fullname, it will save it in ps->fullname
938 and it will also return the value.
940 If this function fails to find the file that this partial_symtab represents,
941 NULL will be returned and ps->fullname will be set to NULL. */
943 psymtab_to_fullname (struct partial_symtab
*ps
)
950 /* Don't check ps->fullname here, the file could have been
951 deleted/moved/..., look for it again */
952 r
= find_and_open_source (ps
->objfile
, ps
->filename
, ps
->dirname
,
964 /* Create and initialize the table S->line_charpos that records
965 the positions of the lines in the source file, which is assumed
966 to be open on descriptor DESC.
967 All set S->nlines to the number of such lines. */
970 find_source_lines (struct symtab
*s
, int desc
)
973 char *data
, *p
, *end
;
975 int lines_allocated
= 1000;
980 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
981 if (fstat (desc
, &st
) < 0)
982 perror_with_name (s
->filename
);
984 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
985 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
987 mtime
= bfd_get_mtime (exec_bfd
);
989 if (mtime
&& mtime
< st
.st_mtime
)
990 warning (_("Source file is more recent than executable."));
992 #ifdef LSEEK_NOT_LINEAR
996 /* Have to read it byte by byte to find out where the chars live */
998 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
1000 while (myread (desc
, &c
, 1) > 0)
1004 if (nlines
== lines_allocated
)
1006 lines_allocated
*= 2;
1008 (int *) xrealloc ((char *) line_charpos
,
1009 sizeof (int) * lines_allocated
);
1011 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
1015 #else /* lseek linear. */
1017 struct cleanup
*old_cleanups
;
1019 /* st_size might be a large type, but we only support source files whose
1020 size fits in an int. */
1021 size
= (int) st
.st_size
;
1023 /* Use malloc, not alloca, because this may be pretty large, and we may
1024 run into various kinds of limits on stack size. */
1025 data
= (char *) xmalloc (size
);
1026 old_cleanups
= make_cleanup (xfree
, data
);
1028 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1029 size
= myread (desc
, data
, size
);
1031 perror_with_name (s
->filename
);
1034 line_charpos
[0] = 0;
1039 /* A newline at the end does not start a new line. */
1042 if (nlines
== lines_allocated
)
1044 lines_allocated
*= 2;
1046 (int *) xrealloc ((char *) line_charpos
,
1047 sizeof (int) * lines_allocated
);
1049 line_charpos
[nlines
++] = p
- data
;
1052 do_cleanups (old_cleanups
);
1054 #endif /* lseek linear. */
1057 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1061 /* Return the character position of a line LINE in symtab S.
1062 Return 0 if anything is invalid. */
1064 #if 0 /* Currently unused */
1067 source_line_charpos (struct symtab
*s
, int line
)
1071 if (!s
->line_charpos
|| line
<= 0)
1073 if (line
> s
->nlines
)
1075 return s
->line_charpos
[line
- 1];
1078 /* Return the line number of character position POS in symtab S. */
1081 source_charpos_line (struct symtab
*s
, int chr
)
1086 if (s
== 0 || s
->line_charpos
== 0)
1088 lnp
= s
->line_charpos
;
1089 /* Files are usually short, so sequential search is Ok */
1090 while (line
< s
->nlines
&& *lnp
<= chr
)
1095 if (line
>= s
->nlines
)
1103 /* Get full pathname and line number positions for a symtab.
1104 Return nonzero if line numbers may have changed.
1105 Set *FULLNAME to actual name of the file as found by `openp',
1106 or to 0 if the file is not found. */
1109 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1111 int desc
, linenums_changed
= 0;
1113 desc
= open_source_file (s
);
1121 *fullname
= s
->fullname
;
1122 if (s
->line_charpos
== 0)
1123 linenums_changed
= 1;
1124 if (linenums_changed
)
1125 find_source_lines (s
, desc
);
1127 return linenums_changed
;
1130 /* Print text describing the full name of the source file S
1131 and the line number LINE and its corresponding character position.
1132 The text starts with two Ctrl-z so that the Emacs-GDB interface
1135 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1137 Return 1 if successful, 0 if could not find the file. */
1140 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1143 if (s
->line_charpos
== 0)
1144 get_filename_and_charpos (s
, (char **) NULL
);
1145 if (s
->fullname
== 0)
1147 if (line
> s
->nlines
)
1148 /* Don't index off the end of the line_charpos array. */
1150 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1153 current_source_line
= line
;
1154 first_line_listed
= line
;
1155 last_line_listed
= line
;
1156 current_source_symtab
= s
;
1161 /* Print source lines from the file of symtab S,
1162 starting with line number LINE and stopping before line number STOPLINE. */
1164 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1167 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1172 int nlines
= stopline
- line
;
1174 /* Regardless of whether we can open the file, set current_source_symtab. */
1175 current_source_symtab
= s
;
1176 current_source_line
= line
;
1177 first_line_listed
= line
;
1179 /* If printing of source lines is disabled, just print file and line number */
1180 if (ui_out_test_flags (uiout
, ui_source_list
))
1182 /* Only prints "No such file or directory" once */
1183 if ((s
!= last_source_visited
) || (!last_source_error
))
1185 last_source_visited
= s
;
1186 desc
= open_source_file (s
);
1190 desc
= last_source_error
;
1202 last_source_error
= desc
;
1206 char *name
= alloca (strlen (s
->filename
) + 100);
1207 sprintf (name
, "%d\t%s", line
, s
->filename
);
1208 print_sys_errmsg (name
, errno
);
1211 ui_out_field_int (uiout
, "line", line
);
1212 ui_out_text (uiout
, "\tin ");
1213 ui_out_field_string (uiout
, "file", s
->filename
);
1214 ui_out_text (uiout
, "\n");
1219 last_source_error
= 0;
1221 if (s
->line_charpos
== 0)
1222 find_source_lines (s
, desc
);
1224 if (line
< 1 || line
> s
->nlines
)
1227 error (_("Line number %d out of range; %s has %d lines."),
1228 line
, s
->filename
, s
->nlines
);
1231 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1234 perror_with_name (s
->filename
);
1237 stream
= fdopen (desc
, FDOPEN_MODE
);
1240 while (nlines
-- > 0)
1247 last_line_listed
= current_source_line
;
1248 sprintf (buf
, "%d\t", current_source_line
++);
1249 ui_out_text (uiout
, buf
);
1252 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1254 sprintf (buf
, "^%c", c
+ 0100);
1255 ui_out_text (uiout
, buf
);
1258 ui_out_text (uiout
, "^?");
1261 /* Skip a \r character, but only before a \n. */
1262 int c1
= fgetc (stream
);
1265 printf_filtered ("^%c", c
+ 0100);
1267 ungetc (c1
, stream
);
1271 sprintf (buf
, "%c", c
);
1272 ui_out_text (uiout
, buf
);
1275 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1281 /* Show source lines from the file of symtab S, starting with line
1282 number LINE and stopping before line number STOPLINE. If this is the
1283 not the command line version, then the source is shown in the source
1284 window otherwise it is simply printed */
1287 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1289 print_source_lines_base (s
, line
, stopline
, noerror
);
1292 /* Print info on range of pc's in a specified line. */
1295 line_info (char *arg
, int from_tty
)
1297 struct symtabs_and_lines sals
;
1298 struct symtab_and_line sal
;
1299 CORE_ADDR start_pc
, end_pc
;
1302 init_sal (&sal
); /* initialize to zeroes */
1306 sal
.symtab
= current_source_symtab
;
1307 sal
.line
= last_line_listed
;
1309 sals
.sals
= (struct symtab_and_line
*)
1310 xmalloc (sizeof (struct symtab_and_line
));
1315 sals
= decode_line_spec_1 (arg
, 0);
1320 /* C++ More than one line may have been specified, as when the user
1321 specifies an overloaded function name. Print info on them all. */
1322 for (i
= 0; i
< sals
.nelts
; i
++)
1326 if (sal
.symtab
== 0)
1328 printf_filtered (_("No line number information available"));
1331 /* This is useful for "info line *0x7f34". If we can't tell the
1332 user about a source line, at least let them have the symbolic
1334 printf_filtered (" for address ");
1336 print_address (sal
.pc
, gdb_stdout
);
1339 printf_filtered (".");
1340 printf_filtered ("\n");
1342 else if (sal
.line
> 0
1343 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1345 if (start_pc
== end_pc
)
1347 printf_filtered ("Line %d of \"%s\"",
1348 sal
.line
, sal
.symtab
->filename
);
1350 printf_filtered (" is at address ");
1351 print_address (start_pc
, gdb_stdout
);
1353 printf_filtered (" but contains no code.\n");
1357 printf_filtered ("Line %d of \"%s\"",
1358 sal
.line
, sal
.symtab
->filename
);
1360 printf_filtered (" starts at address ");
1361 print_address (start_pc
, gdb_stdout
);
1363 printf_filtered (" and ends at ");
1364 print_address (end_pc
, gdb_stdout
);
1365 printf_filtered (".\n");
1368 /* x/i should display this line's code. */
1369 set_next_address (start_pc
);
1371 /* Repeating "info line" should do the following line. */
1372 last_line_listed
= sal
.line
+ 1;
1374 /* If this is the only line, show the source code. If it could
1375 not find the file, don't do anything special. */
1376 if (annotation_level
&& sals
.nelts
== 1)
1377 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1380 /* Is there any case in which we get here, and have an address
1381 which the user would want to see? If we have debugging symbols
1382 and no line numbers? */
1383 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1384 sal
.line
, sal
.symtab
->filename
);
1389 /* Commands to search the source file for a regexp. */
1392 forward_search_command (char *regex
, int from_tty
)
1400 line
= last_line_listed
+ 1;
1402 msg
= (char *) re_comp (regex
);
1404 error (("%s"), msg
);
1406 if (current_source_symtab
== 0)
1407 select_source_symtab (0);
1409 desc
= open_source_file (current_source_symtab
);
1411 perror_with_name (current_source_symtab
->filename
);
1413 if (current_source_symtab
->line_charpos
== 0)
1414 find_source_lines (current_source_symtab
, desc
);
1416 if (line
< 1 || line
> current_source_symtab
->nlines
)
1419 error (_("Expression not found"));
1422 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1425 perror_with_name (current_source_symtab
->filename
);
1428 stream
= fdopen (desc
, FDOPEN_MODE
);
1432 static char *buf
= NULL
;
1434 int cursize
, newsize
;
1437 buf
= xmalloc (cursize
);
1446 if (p
- buf
== cursize
)
1448 newsize
= cursize
+ cursize
/ 2;
1449 buf
= xrealloc (buf
, newsize
);
1454 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1456 /* Remove the \r, if any, at the end of the line, otherwise
1457 regular expressions that end with $ or \n won't work. */
1458 if (p
- buf
> 1 && p
[-2] == '\r')
1464 /* we now have a source line in buf, null terminate and match */
1466 if (re_exec (buf
) > 0)
1470 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1471 set_internalvar (lookup_internalvar ("_"),
1472 value_from_longest (builtin_type_int
,
1474 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1480 printf_filtered (_("Expression not found\n"));
1485 reverse_search_command (char *regex
, int from_tty
)
1493 line
= last_line_listed
- 1;
1495 msg
= (char *) re_comp (regex
);
1497 error (("%s"), msg
);
1499 if (current_source_symtab
== 0)
1500 select_source_symtab (0);
1502 desc
= open_source_file (current_source_symtab
);
1504 perror_with_name (current_source_symtab
->filename
);
1506 if (current_source_symtab
->line_charpos
== 0)
1507 find_source_lines (current_source_symtab
, desc
);
1509 if (line
< 1 || line
> current_source_symtab
->nlines
)
1512 error (_("Expression not found"));
1515 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1518 perror_with_name (current_source_symtab
->filename
);
1521 stream
= fdopen (desc
, FDOPEN_MODE
);
1525 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1526 char buf
[4096]; /* Should be reasonable??? */
1536 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1538 /* Remove the \r, if any, at the end of the line, otherwise
1539 regular expressions that end with $ or \n won't work. */
1540 if (p
- buf
> 1 && p
[-2] == '\r')
1546 /* We now have a source line in buf; null terminate and match. */
1548 if (re_exec (buf
) > 0)
1552 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1553 set_internalvar (lookup_internalvar ("_"),
1554 value_from_longest (builtin_type_int
,
1556 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1560 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1563 perror_with_name (current_source_symtab
->filename
);
1567 printf_filtered (_("Expression not found\n"));
1573 _initialize_source (void)
1575 struct cmd_list_element
*c
;
1576 current_source_symtab
= 0;
1577 init_source_path ();
1579 /* The intention is to use POSIX Basic Regular Expressions.
1580 Always use the GNU regex routine for consistency across all hosts.
1581 Our current GNU regex.c does not have all the POSIX features, so this is
1582 just an approximation. */
1583 re_set_syntax (RE_SYNTAX_GREP
);
1585 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1586 Add directory DIR to beginning of search path for source files.\n\
1587 Forget cached info on source file locations and line positions.\n\
1588 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1589 directory in which the source file was compiled into object code.\n\
1590 With no argument, reset the search path to $cdir:$cwd, the default."),
1594 add_com_alias ("use", "directory", class_files
, 0);
1596 set_cmd_completer (c
, filename_completer
);
1598 add_cmd ("directories", no_class
, show_directories
, _("\
1599 Current search path for finding source files.\n\
1600 $cwd in the path means the current working directory.\n\
1601 $cdir in the path means the compilation directory of the source file."),
1606 add_com_alias ("D", "directory", class_files
, 0);
1607 add_cmd ("ld", no_class
, show_directories
, _("\
1608 Current search path for finding source files.\n\
1609 $cwd in the path means the current working directory.\n\
1610 $cdir in the path means the compilation directory of the source file."),
1614 add_info ("source", source_info
,
1615 _("Information about the current source file."));
1617 add_info ("line", line_info
, _("\
1618 Core addresses of the code for a source line.\n\
1619 Line can be specified as\n\
1620 LINENUM, to list around that line in current file,\n\
1621 FILE:LINENUM, to list around that line in that file,\n\
1622 FUNCTION, to list around beginning of that function,\n\
1623 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1624 Default is to describe the last source line that was listed.\n\n\
1625 This sets the default address for \"x\" to the line's first instruction\n\
1626 so that \"x/i\" suffices to start examining the machine code.\n\
1627 The address is also stored as the value of \"$_\"."));
1629 add_com ("forward-search", class_files
, forward_search_command
, _("\
1630 Search for regular expression (see regex(3)) from last line listed.\n\
1631 The matching line number is also stored as the value of \"$_\"."));
1632 add_com_alias ("search", "forward-search", class_files
, 0);
1634 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1635 Search backward for regular expression (see regex(3)) from last line listed.\n\
1636 The matching line number is also stored as the value of \"$_\"."));
1640 add_com_alias ("/", "forward-search", class_files
, 0);
1641 add_com_alias ("?", "reverse-search", class_files
, 0);
1644 add_setshow_uinteger_cmd ("listsize", class_support
, &lines_to_list
, _("\
1645 Set number of source lines gdb will list by default."), _("\
1646 Show number of source lines gdb will list by default."), NULL
,
1649 &setlist
, &showlist
);
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