1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 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., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, 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 const char *name
= s
->filename
;
255 int len
= strlen (name
);
256 if (!(len
> 2 && strcmp(&name
[len
- 2], ".h") == 0))
257 current_source_symtab
= s
;
260 if (current_source_symtab
)
263 /* Howabout the partial symbol tables? */
265 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
267 for (ps
= ofp
->psymtabs
; ps
!= NULL
; ps
= ps
->next
)
269 const char *name
= ps
->filename
;
270 int len
= strlen (name
);
271 if (!(len
> 2 && strcmp (&name
[len
- 2], ".h") == 0))
279 internal_error (__FILE__
, __LINE__
,
280 _("select_source_symtab: "
281 "readin pst found and no symtabs."));
285 current_source_symtab
= PSYMTAB_TO_SYMTAB (cs_pst
);
288 if (current_source_symtab
)
291 error (_("Can't find a default source file"));
295 show_directories (char *ignore
, int from_tty
)
297 puts_filtered ("Source directories searched: ");
298 puts_filtered (source_path
);
299 puts_filtered ("\n");
302 /* Forget what we learned about line positions in source files, and
303 which directories contain them; must check again now since files
304 may be found in a different directory now. */
307 forget_cached_source_info (void)
310 struct objfile
*objfile
;
311 struct partial_symtab
*pst
;
313 for (objfile
= object_files
; objfile
!= NULL
; objfile
= objfile
->next
)
315 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
317 if (s
->line_charpos
!= NULL
)
319 xfree (s
->line_charpos
);
320 s
->line_charpos
= NULL
;
322 if (s
->fullname
!= NULL
)
329 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
331 if (pst
->fullname
!= NULL
)
333 xfree (pst
->fullname
);
334 pst
->fullname
= NULL
;
341 init_source_path (void)
345 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
346 source_path
= xstrdup (buf
);
347 forget_cached_source_info ();
351 init_last_source_visited (void)
353 last_source_visited
= NULL
;
356 /* Add zero or more directories to the front of the source path. */
359 directory_command (char *dirname
, int from_tty
)
362 /* FIXME, this goes to "delete dir"... */
365 if (from_tty
&& query (_("Reinitialize source path to empty? ")))
373 mod_path (dirname
, &source_path
);
374 last_source_visited
= NULL
;
377 show_directories ((char *) 0, from_tty
);
378 forget_cached_source_info ();
381 /* Add a path given with the -d command line switch.
382 This will not be quoted so we must not treat spaces as separators. */
385 directory_switch (char *dirname
, int from_tty
)
387 add_path (dirname
, &source_path
, 0);
390 /* Add zero or more directories to the front of an arbitrary path. */
393 mod_path (char *dirname
, char **which_path
)
395 add_path (dirname
, which_path
, 1);
398 /* Workhorse of mod_path. Takes an extra argument to determine
399 if dirname should be parsed for separators that indicate multiple
400 directories. This allows for interfaces that pre-parse the dirname
401 and allow specification of traditional separator characters such
405 add_path (char *dirname
, char **which_path
, int parse_separators
)
407 char *old
= *which_path
;
416 if (parse_separators
)
418 /* This will properly parse the space and tab separators
419 and any quotes that may exist. DIRNAME_SEPARATOR will
420 be dealt with later. */
421 argv
= buildargv (dirname
);
422 make_cleanup_freeargv (argv
);
431 arg
= xstrdup (dirname
);
432 make_cleanup (xfree
, arg
);
442 char *separator
= NULL
;
444 /* Spaces and tabs will have been removed by buildargv().
445 The directories will there be split into a list but
446 each entry may still contain DIRNAME_SEPARATOR. */
447 if (parse_separators
)
448 separator
= strchr (name
, DIRNAME_SEPARATOR
);
451 p
= arg
= name
+ strlen (name
);
456 while (*arg
== DIRNAME_SEPARATOR
)
460 /* If there are no more directories in this argument then start
461 on the next argument next time round the loop (if any). */
463 arg
= parse_separators
? argv
[++argv_index
] : NULL
;
466 /* name is the start of the directory.
467 p is the separator (or null) following the end. */
469 while (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
470 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
471 /* On MS-DOS and MS-Windows, h:\ is different from h: */
472 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
474 && IS_DIR_SEPARATOR (p
[-1]))
475 /* Sigh. "foo/" => "foo" */
479 while (p
> name
&& p
[-1] == '.')
483 /* "." => getwd (). */
484 name
= current_directory
;
487 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
497 /* "...foo/." => "...foo". */
508 name
= tilde_expand (name
);
509 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
510 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
511 name
= concat (name
, ".", (char *)NULL
);
513 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
514 name
= concat (current_directory
, SLASH_STRING
, name
, (char *)NULL
);
516 name
= savestring (name
, p
- name
);
517 make_cleanup (xfree
, name
);
519 /* Unless it's a variable, check existence. */
522 /* These are warnings, not errors, since we don't want a
523 non-existent directory in a .gdbinit file to stop processing
524 of the .gdbinit file.
526 Whether they get added to the path is more debatable. Current
527 answer is yes, in case the user wants to go make the directory
528 or whatever. If the directory continues to not exist/not be
529 a directory/etc, then having them in the path should be
531 if (stat (name
, &st
) < 0)
533 int save_errno
= errno
;
534 fprintf_unfiltered (gdb_stderr
, "Warning: ");
535 print_sys_errmsg (name
, save_errno
);
537 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
538 warning (_("%s is not a directory."), name
);
543 unsigned int len
= strlen (name
);
548 /* FIXME: strncmp loses in interesting ways on MS-DOS and
549 MS-Windows because of case-insensitivity and two different
550 but functionally identical slash characters. We need a
551 special filesystem-dependent file-name comparison function.
553 Actually, even on Unix I would use realpath() or its work-
554 alike before comparing. Then all the code above which
555 removes excess slashes and dots could simply go away. */
556 if (!strncmp (p
, name
, len
)
557 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
559 /* Found it in the search path, remove old copy */
561 p
--; /* Back over leading separator */
562 if (prefix
> p
- *which_path
)
563 goto skip_dup
; /* Same dir twice in one cmd */
564 strcpy (p
, &p
[len
+ 1]); /* Copy from next \0 or : */
566 p
= strchr (p
, DIRNAME_SEPARATOR
);
576 tinybuf
[0] = DIRNAME_SEPARATOR
;
579 /* If we have already tacked on a name(s) in this command, be sure they stay
580 on the front as we tack on some more. */
587 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
589 *which_path
= concat (temp
, "", &old
[prefix
], (char *)NULL
);
590 prefix
= strlen (temp
);
595 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
597 prefix
= strlen (name
);
610 source_info (char *ignore
, int from_tty
)
612 struct symtab
*s
= current_source_symtab
;
616 printf_filtered (_("No current source file.\n"));
619 printf_filtered (_("Current source file is %s\n"), s
->filename
);
621 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
623 printf_filtered (_("Located in %s\n"), s
->fullname
);
625 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
626 s
->nlines
== 1 ? "" : "s");
628 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
629 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
630 printf_filtered (_("%s preprocessor macro info.\n"),
631 s
->macro_table
? "Includes" : "Does not include");
635 /* Return True if the file NAME exists and is a regular file */
637 is_regular_file (const char *name
)
640 const int status
= stat (name
, &st
);
642 /* Stat should never fail except when the file does not exist.
643 If stat fails, analyze the source of error and return True
644 unless the file does not exist, to avoid returning false results
645 on obscure systems where stat does not work as expected.
648 return (errno
!= ENOENT
);
650 return S_ISREG (st
.st_mode
);
653 /* Open a file named STRING, searching path PATH (dir names sep by some char)
654 using mode MODE and protection bits PROT in the calls to open.
656 OPTS specifies the function behaviour in specific cases.
658 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
659 (ie pretend the first element of PATH is "."). This also indicates
660 that a slash in STRING disables searching of the path (this is
661 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
662 get that particular version of foo or an error message).
664 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
665 searched in path (we usually want this for source files but not for
668 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
669 the actual file opened (this string will always start with a "/"). We
670 have to take special pains to avoid doubling the "/" between the directory
671 and the file, sigh! Emacs gets confuzzed by this when we print the
674 If a file is found, return the descriptor.
675 Otherwise, return -1, with errno set for the last name we tried to open. */
677 /* >>>> This should only allow files of certain types,
678 >>>> eg executable, non-directory */
680 openp (const char *path
, int opts
, const char *string
,
682 char **filename_opened
)
696 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
700 if (is_regular_file (string
))
702 filename
= alloca (strlen (string
) + 1);
703 strcpy (filename
, string
);
704 fd
= open (filename
, mode
, prot
);
714 if (!(opts
& OPF_SEARCH_IN_PATH
))
715 for (i
= 0; string
[i
]; i
++)
716 if (IS_DIR_SEPARATOR (string
[i
]))
720 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
721 while (IS_DIR_SEPARATOR(string
[0]))
725 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
728 alloclen
= strlen (path
) + strlen (string
) + 2;
729 filename
= alloca (alloclen
);
731 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
733 p1
= strchr (p
, DIRNAME_SEPARATOR
);
739 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
740 && p
[2] == 'w' && p
[3] == 'd')
742 /* Name is $cwd -- insert current directory name instead. */
745 /* First, realloc the filename buffer if too short. */
746 len
= strlen (current_directory
);
747 newlen
= len
+ strlen (string
) + 2;
748 if (newlen
> alloclen
)
751 filename
= alloca (alloclen
);
753 strcpy (filename
, current_directory
);
757 /* Normal file name in path -- just use it. */
758 strncpy (filename
, p
, len
);
762 /* Remove trailing slashes */
763 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
766 strcat (filename
+ len
, SLASH_STRING
);
767 strcat (filename
, string
);
769 if (is_regular_file (filename
))
771 fd
= open (filename
, mode
);
780 /* If a file was opened, canonicalize its filename. Use xfullpath
781 rather than gdb_realpath to avoid resolving the basename part
782 of filenames when the associated file is a symbolic link. This
783 fixes a potential inconsistency between the filenames known to
784 GDB and the filenames it prints in the annotations. */
786 *filename_opened
= NULL
;
787 else if (IS_ABSOLUTE_PATH (filename
))
788 *filename_opened
= xfullpath (filename
);
791 /* Beware the // my son, the Emacs barfs, the botch that catch... */
793 char *f
= concat (current_directory
,
794 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
796 filename
, (char *)NULL
);
797 *filename_opened
= xfullpath (f
);
806 /* This is essentially a convenience, for clients that want the behaviour
807 of openp, using source_path, but that really don't want the file to be
808 opened but want instead just to know what the full pathname is (as
809 qualified against source_path).
811 The current working directory is searched first.
813 If the file was found, this function returns 1, and FULL_PATHNAME is
814 set to the fully-qualified pathname.
816 Else, this functions returns 0, and FULL_PATHNAME is set to NULL. */
818 source_full_path_of (char *filename
, char **full_pathname
)
822 fd
= openp (source_path
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
823 O_RDONLY
, 0, full_pathname
);
826 *full_pathname
= NULL
;
834 /* This function is capable of finding the absolute path to a
835 source file, and opening it, provided you give it an
836 OBJFILE and FILENAME. Both the DIRNAME and FULLNAME are only
837 added suggestions on where to find the file.
839 OBJFILE should be the objfile associated with a psymtab or symtab.
840 FILENAME should be the filename to open.
841 DIRNAME is the compilation directory of a particular source file.
842 Only some debug formats provide this info.
843 FULLNAME can be the last known absolute path to the file in question.
846 A valid file descriptor is returned. ( the return value is positive )
847 FULLNAME is set to the absolute path to the file just opened.
850 A non valid file descriptor is returned. ( the return value is negitive )
851 FULLNAME is set to NULL. */
853 find_and_open_source (struct objfile
*objfile
,
854 const char *filename
,
858 char *path
= source_path
;
862 /* Quick way out if we already know its full name */
865 result
= open (*fullname
, OPEN_MODE
);
868 /* Didn't work -- free old one, try again. */
875 /* Replace a path entry of $cdir with the compilation directory name */
877 /* We cast strstr's result in case an ANSIhole has made it const,
878 which produces a "required warning" when assigned to a nonconst. */
879 p
= (char *) strstr (source_path
, "$cdir");
880 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
881 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
886 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
887 len
= p
- source_path
;
888 strncpy (path
, source_path
, len
); /* Before $cdir */
889 strcpy (path
+ len
, dirname
); /* new stuff */
890 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
894 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, 0, fullname
);
897 /* Didn't work. Try using just the basename. */
898 p
= lbasename (filename
);
900 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, 0, fullname
);
906 tmp_fullname
= *fullname
;
907 *fullname
= xstrdup (tmp_fullname
);
908 xfree (tmp_fullname
);
913 /* Open a source file given a symtab S. Returns a file descriptor or
914 negative number for error.
916 This function is a convience function to find_and_open_source. */
919 open_source_file (struct symtab
*s
)
924 return find_and_open_source (s
->objfile
, s
->filename
, s
->dirname
,
928 /* Finds the fullname that a symtab represents.
930 If this functions finds the fullname, it will save it in ps->fullname
931 and it will also return the value.
933 If this function fails to find the file that this symtab represents,
934 NULL will be returned and ps->fullname will be set to NULL. */
936 symtab_to_fullname (struct symtab
*s
)
943 /* Don't check s->fullname here, the file could have been
944 deleted/moved/..., look for it again */
945 r
= find_and_open_source (s
->objfile
, s
->filename
, s
->dirname
,
957 /* Finds the fullname that a partial_symtab represents.
959 If this functions finds the fullname, it will save it in ps->fullname
960 and it will also return the value.
962 If this function fails to find the file that this partial_symtab represents,
963 NULL will be returned and ps->fullname will be set to NULL. */
965 psymtab_to_fullname (struct partial_symtab
*ps
)
972 /* Don't check ps->fullname here, the file could have been
973 deleted/moved/..., look for it again */
974 r
= find_and_open_source (ps
->objfile
, ps
->filename
, ps
->dirname
,
986 /* Create and initialize the table S->line_charpos that records
987 the positions of the lines in the source file, which is assumed
988 to be open on descriptor DESC.
989 All set S->nlines to the number of such lines. */
992 find_source_lines (struct symtab
*s
, int desc
)
995 char *data
, *p
, *end
;
997 int lines_allocated
= 1000;
1002 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
1003 if (fstat (desc
, &st
) < 0)
1004 perror_with_name (s
->filename
);
1006 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
1007 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
1009 mtime
= bfd_get_mtime (exec_bfd
);
1011 if (mtime
&& mtime
< st
.st_mtime
)
1012 warning (_("Source file is more recent than executable."));
1014 #ifdef LSEEK_NOT_LINEAR
1018 /* Have to read it byte by byte to find out where the chars live */
1020 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
1022 while (myread (desc
, &c
, 1) > 0)
1026 if (nlines
== lines_allocated
)
1028 lines_allocated
*= 2;
1030 (int *) xrealloc ((char *) line_charpos
,
1031 sizeof (int) * lines_allocated
);
1033 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
1037 #else /* lseek linear. */
1039 struct cleanup
*old_cleanups
;
1041 /* st_size might be a large type, but we only support source files whose
1042 size fits in an int. */
1043 size
= (int) st
.st_size
;
1045 /* Use malloc, not alloca, because this may be pretty large, and we may
1046 run into various kinds of limits on stack size. */
1047 data
= (char *) xmalloc (size
);
1048 old_cleanups
= make_cleanup (xfree
, data
);
1050 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1051 size
= myread (desc
, data
, size
);
1053 perror_with_name (s
->filename
);
1056 line_charpos
[0] = 0;
1061 /* A newline at the end does not start a new line. */
1064 if (nlines
== lines_allocated
)
1066 lines_allocated
*= 2;
1068 (int *) xrealloc ((char *) line_charpos
,
1069 sizeof (int) * lines_allocated
);
1071 line_charpos
[nlines
++] = p
- data
;
1074 do_cleanups (old_cleanups
);
1076 #endif /* lseek linear. */
1079 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1083 /* Return the character position of a line LINE in symtab S.
1084 Return 0 if anything is invalid. */
1086 #if 0 /* Currently unused */
1089 source_line_charpos (struct symtab
*s
, int line
)
1093 if (!s
->line_charpos
|| line
<= 0)
1095 if (line
> s
->nlines
)
1097 return s
->line_charpos
[line
- 1];
1100 /* Return the line number of character position POS in symtab S. */
1103 source_charpos_line (struct symtab
*s
, int chr
)
1108 if (s
== 0 || s
->line_charpos
== 0)
1110 lnp
= s
->line_charpos
;
1111 /* Files are usually short, so sequential search is Ok */
1112 while (line
< s
->nlines
&& *lnp
<= chr
)
1117 if (line
>= s
->nlines
)
1125 /* Get full pathname and line number positions for a symtab.
1126 Return nonzero if line numbers may have changed.
1127 Set *FULLNAME to actual name of the file as found by `openp',
1128 or to 0 if the file is not found. */
1131 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1133 int desc
, linenums_changed
= 0;
1135 desc
= open_source_file (s
);
1143 *fullname
= s
->fullname
;
1144 if (s
->line_charpos
== 0)
1145 linenums_changed
= 1;
1146 if (linenums_changed
)
1147 find_source_lines (s
, desc
);
1149 return linenums_changed
;
1152 /* Print text describing the full name of the source file S
1153 and the line number LINE and its corresponding character position.
1154 The text starts with two Ctrl-z so that the Emacs-GDB interface
1157 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1159 Return 1 if successful, 0 if could not find the file. */
1162 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1165 if (s
->line_charpos
== 0)
1166 get_filename_and_charpos (s
, (char **) NULL
);
1167 if (s
->fullname
== 0)
1169 if (line
> s
->nlines
)
1170 /* Don't index off the end of the line_charpos array. */
1172 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1175 current_source_line
= line
;
1176 first_line_listed
= line
;
1177 last_line_listed
= line
;
1178 current_source_symtab
= s
;
1183 /* Print source lines from the file of symtab S,
1184 starting with line number LINE and stopping before line number STOPLINE. */
1186 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1189 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1194 int nlines
= stopline
- line
;
1196 /* Regardless of whether we can open the file, set current_source_symtab. */
1197 current_source_symtab
= s
;
1198 current_source_line
= line
;
1199 first_line_listed
= line
;
1201 /* If printing of source lines is disabled, just print file and line number */
1202 if (ui_out_test_flags (uiout
, ui_source_list
))
1204 /* Only prints "No such file or directory" once */
1205 if ((s
!= last_source_visited
) || (!last_source_error
))
1207 last_source_visited
= s
;
1208 desc
= open_source_file (s
);
1212 desc
= last_source_error
;
1224 last_source_error
= desc
;
1228 char *name
= alloca (strlen (s
->filename
) + 100);
1229 sprintf (name
, "%d\t%s", line
, s
->filename
);
1230 print_sys_errmsg (name
, errno
);
1233 ui_out_field_int (uiout
, "line", line
);
1234 ui_out_text (uiout
, "\tin ");
1235 ui_out_field_string (uiout
, "file", s
->filename
);
1236 ui_out_text (uiout
, "\n");
1241 last_source_error
= 0;
1243 if (s
->line_charpos
== 0)
1244 find_source_lines (s
, desc
);
1246 if (line
< 1 || line
> s
->nlines
)
1249 error (_("Line number %d out of range; %s has %d lines."),
1250 line
, s
->filename
, s
->nlines
);
1253 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1256 perror_with_name (s
->filename
);
1259 stream
= fdopen (desc
, FDOPEN_MODE
);
1262 while (nlines
-- > 0)
1269 last_line_listed
= current_source_line
;
1270 sprintf (buf
, "%d\t", current_source_line
++);
1271 ui_out_text (uiout
, buf
);
1274 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1276 sprintf (buf
, "^%c", c
+ 0100);
1277 ui_out_text (uiout
, buf
);
1280 ui_out_text (uiout
, "^?");
1283 /* Skip a \r character, but only before a \n. */
1284 int c1
= fgetc (stream
);
1287 printf_filtered ("^%c", c
+ 0100);
1289 ungetc (c1
, stream
);
1293 sprintf (buf
, "%c", c
);
1294 ui_out_text (uiout
, buf
);
1297 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1303 /* Show source lines from the file of symtab S, starting with line
1304 number LINE and stopping before line number STOPLINE. If this is the
1305 not the command line version, then the source is shown in the source
1306 window otherwise it is simply printed */
1309 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1311 print_source_lines_base (s
, line
, stopline
, noerror
);
1314 /* Print info on range of pc's in a specified line. */
1317 line_info (char *arg
, int from_tty
)
1319 struct symtabs_and_lines sals
;
1320 struct symtab_and_line sal
;
1321 CORE_ADDR start_pc
, end_pc
;
1324 init_sal (&sal
); /* initialize to zeroes */
1328 sal
.symtab
= current_source_symtab
;
1329 sal
.line
= last_line_listed
;
1331 sals
.sals
= (struct symtab_and_line
*)
1332 xmalloc (sizeof (struct symtab_and_line
));
1337 sals
= decode_line_spec_1 (arg
, 0);
1342 /* C++ More than one line may have been specified, as when the user
1343 specifies an overloaded function name. Print info on them all. */
1344 for (i
= 0; i
< sals
.nelts
; i
++)
1348 if (sal
.symtab
== 0)
1350 printf_filtered (_("No line number information available"));
1353 /* This is useful for "info line *0x7f34". If we can't tell the
1354 user about a source line, at least let them have the symbolic
1356 printf_filtered (" for address ");
1358 print_address (sal
.pc
, gdb_stdout
);
1361 printf_filtered (".");
1362 printf_filtered ("\n");
1364 else if (sal
.line
> 0
1365 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1367 if (start_pc
== end_pc
)
1369 printf_filtered ("Line %d of \"%s\"",
1370 sal
.line
, sal
.symtab
->filename
);
1372 printf_filtered (" is at address ");
1373 print_address (start_pc
, gdb_stdout
);
1375 printf_filtered (" but contains no code.\n");
1379 printf_filtered ("Line %d of \"%s\"",
1380 sal
.line
, sal
.symtab
->filename
);
1382 printf_filtered (" starts at address ");
1383 print_address (start_pc
, gdb_stdout
);
1385 printf_filtered (" and ends at ");
1386 print_address (end_pc
, gdb_stdout
);
1387 printf_filtered (".\n");
1390 /* x/i should display this line's code. */
1391 set_next_address (start_pc
);
1393 /* Repeating "info line" should do the following line. */
1394 last_line_listed
= sal
.line
+ 1;
1396 /* If this is the only line, show the source code. If it could
1397 not find the file, don't do anything special. */
1398 if (annotation_level
&& sals
.nelts
== 1)
1399 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1402 /* Is there any case in which we get here, and have an address
1403 which the user would want to see? If we have debugging symbols
1404 and no line numbers? */
1405 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1406 sal
.line
, sal
.symtab
->filename
);
1411 /* Commands to search the source file for a regexp. */
1414 forward_search_command (char *regex
, int from_tty
)
1422 line
= last_line_listed
+ 1;
1424 msg
= (char *) re_comp (regex
);
1426 error (("%s"), msg
);
1428 if (current_source_symtab
== 0)
1429 select_source_symtab (0);
1431 desc
= open_source_file (current_source_symtab
);
1433 perror_with_name (current_source_symtab
->filename
);
1435 if (current_source_symtab
->line_charpos
== 0)
1436 find_source_lines (current_source_symtab
, desc
);
1438 if (line
< 1 || line
> current_source_symtab
->nlines
)
1441 error (_("Expression not found"));
1444 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1447 perror_with_name (current_source_symtab
->filename
);
1450 stream
= fdopen (desc
, FDOPEN_MODE
);
1454 static char *buf
= NULL
;
1456 int cursize
, newsize
;
1459 buf
= xmalloc (cursize
);
1468 if (p
- buf
== cursize
)
1470 newsize
= cursize
+ cursize
/ 2;
1471 buf
= xrealloc (buf
, newsize
);
1476 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1478 /* Remove the \r, if any, at the end of the line, otherwise
1479 regular expressions that end with $ or \n won't work. */
1480 if (p
- buf
> 1 && p
[-2] == '\r')
1486 /* we now have a source line in buf, null terminate and match */
1488 if (re_exec (buf
) > 0)
1492 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1493 set_internalvar (lookup_internalvar ("_"),
1494 value_from_longest (builtin_type_int
,
1496 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1502 printf_filtered (_("Expression not found\n"));
1507 reverse_search_command (char *regex
, int from_tty
)
1515 line
= last_line_listed
- 1;
1517 msg
= (char *) re_comp (regex
);
1519 error (("%s"), msg
);
1521 if (current_source_symtab
== 0)
1522 select_source_symtab (0);
1524 desc
= open_source_file (current_source_symtab
);
1526 perror_with_name (current_source_symtab
->filename
);
1528 if (current_source_symtab
->line_charpos
== 0)
1529 find_source_lines (current_source_symtab
, desc
);
1531 if (line
< 1 || line
> current_source_symtab
->nlines
)
1534 error (_("Expression not found"));
1537 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1540 perror_with_name (current_source_symtab
->filename
);
1543 stream
= fdopen (desc
, FDOPEN_MODE
);
1547 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1548 char buf
[4096]; /* Should be reasonable??? */
1558 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1560 /* Remove the \r, if any, at the end of the line, otherwise
1561 regular expressions that end with $ or \n won't work. */
1562 if (p
- buf
> 1 && p
[-2] == '\r')
1568 /* We now have a source line in buf; null terminate and match. */
1570 if (re_exec (buf
) > 0)
1574 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1575 set_internalvar (lookup_internalvar ("_"),
1576 value_from_longest (builtin_type_int
,
1578 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1582 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1585 perror_with_name (current_source_symtab
->filename
);
1589 printf_filtered (_("Expression not found\n"));
1595 _initialize_source (void)
1597 struct cmd_list_element
*c
;
1598 current_source_symtab
= 0;
1599 init_source_path ();
1601 /* The intention is to use POSIX Basic Regular Expressions.
1602 Always use the GNU regex routine for consistency across all hosts.
1603 Our current GNU regex.c does not have all the POSIX features, so this is
1604 just an approximation. */
1605 re_set_syntax (RE_SYNTAX_GREP
);
1607 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1608 Add directory DIR to beginning of search path for source files.\n\
1609 Forget cached info on source file locations and line positions.\n\
1610 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1611 directory in which the source file was compiled into object code.\n\
1612 With no argument, reset the search path to $cdir:$cwd, the default."),
1616 add_com_alias ("use", "directory", class_files
, 0);
1618 set_cmd_completer (c
, filename_completer
);
1620 add_cmd ("directories", no_class
, show_directories
, _("\
1621 Current search path for finding source files.\n\
1622 $cwd in the path means the current working directory.\n\
1623 $cdir in the path means the compilation directory of the source file."),
1628 add_com_alias ("D", "directory", class_files
, 0);
1629 add_cmd ("ld", no_class
, show_directories
, _("\
1630 Current search path for finding source files.\n\
1631 $cwd in the path means the current working directory.\n\
1632 $cdir in the path means the compilation directory of the source file."),
1636 add_info ("source", source_info
,
1637 _("Information about the current source file."));
1639 add_info ("line", line_info
, _("\
1640 Core addresses of the code for a source line.\n\
1641 Line can be specified as\n\
1642 LINENUM, to list around that line in current file,\n\
1643 FILE:LINENUM, to list around that line in that file,\n\
1644 FUNCTION, to list around beginning of that function,\n\
1645 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1646 Default is to describe the last source line that was listed.\n\n\
1647 This sets the default address for \"x\" to the line's first instruction\n\
1648 so that \"x/i\" suffices to start examining the machine code.\n\
1649 The address is also stored as the value of \"$_\"."));
1651 add_com ("forward-search", class_files
, forward_search_command
, _("\
1652 Search for regular expression (see regex(3)) from last line listed.\n\
1653 The matching line number is also stored as the value of \"$_\"."));
1654 add_com_alias ("search", "forward-search", class_files
, 0);
1656 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1657 Search backward for regular expression (see regex(3)) from last line listed.\n\
1658 The matching line number is also stored as the value of \"$_\"."));
1662 add_com_alias ("/", "forward-search", class_files
, 0);
1663 add_com_alias ("?", "reverse-search", class_files
, 0);
1666 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
1667 Set number of source lines gdb will list by default."), _("\
1668 Show number of source lines gdb will list by default."), NULL
,
1671 &setlist
, &showlist
);
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