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
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"
48 #ifdef CRLF_SOURCE_FILES
50 /* Define CRLF_SOURCE_FILES in an xm-*.h file if source files on the
51 host use \r\n rather than just \n. Defining CRLF_SOURCE_FILES is
52 much faster than defining LSEEK_NOT_LINEAR. */
58 #define OPEN_MODE (O_RDONLY | O_BINARY)
59 #define FDOPEN_MODE FOPEN_RB
61 #else /* ! defined (CRLF_SOURCE_FILES) */
63 #define OPEN_MODE O_RDONLY
64 #define FDOPEN_MODE FOPEN_RT
66 #endif /* ! defined (CRLF_SOURCE_FILES) */
68 /* Prototypes for exported functions. */
70 void _initialize_source (void);
72 /* Prototypes for local functions. */
74 static int get_filename_and_charpos (struct symtab
*, char **);
76 static void reverse_search_command (char *, int);
78 static void forward_search_command (char *, int);
80 static void line_info (char *, int);
82 static void list_command (char *, int);
84 static void ambiguous_line_spec (struct symtabs_and_lines
*);
86 static void source_info (char *, int);
88 static void show_directories (char *, int);
90 /* Path of directories to search for source files.
91 Same format as the PATH environment variable's value. */
95 /* Symtab of default file for listing lines of. */
97 struct symtab
*current_source_symtab
;
99 /* Default next line to list. */
101 int current_source_line
;
103 /* Default number of lines to print with commands like "list".
104 This is based on guessing how many long (i.e. more than chars_per_line
105 characters) lines there will be. To be completely correct, "list"
106 and friends should be rewritten to count characters and see where
107 things are wrapping, but that would be a fair amount of work. */
109 int lines_to_list
= 10;
111 /* Line number of last line printed. Default for various commands.
112 current_source_line is usually, but not always, the same as this. */
114 static int last_line_listed
;
116 /* First line number listed by last listing command. */
118 static int first_line_listed
;
120 /* Saves the name of the last source file visited and a possible error code.
121 Used to prevent repeating annoying "No such file or directories" msgs */
123 static struct symtab
*last_source_visited
= NULL
;
124 static int last_source_error
= 0;
127 /* Set the source file default for the "list" command to be S.
129 If S is NULL, and we don't have a default, find one. This
130 should only be called when the user actually tries to use the
131 default, since we produce an error if we can't find a reasonable
132 default. Also, since this can cause symbols to be read, doing it
133 before we need to would make things slower than necessary. */
136 select_source_symtab (register struct symtab
*s
)
138 struct symtabs_and_lines sals
;
139 struct symtab_and_line sal
;
140 struct partial_symtab
*ps
;
141 struct partial_symtab
*cs_pst
= 0;
146 current_source_symtab
= s
;
147 current_source_line
= 1;
151 if (current_source_symtab
)
154 /* Make the default place to list be the function `main'
156 if (lookup_symbol (main_name (), 0, VAR_NAMESPACE
, 0, NULL
))
158 sals
= decode_line_spec (main_name (), 1);
161 current_source_symtab
= sal
.symtab
;
162 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
163 if (current_source_symtab
)
167 /* All right; find the last file in the symtab list (ignoring .h's). */
169 current_source_line
= 1;
171 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
173 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
175 char *name
= s
->filename
;
176 int len
= strlen (name
);
177 if (!(len
> 2 && (STREQ (&name
[len
- 2], ".h"))))
179 current_source_symtab
= s
;
183 if (current_source_symtab
)
186 /* Howabout the partial symbol tables? */
188 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
190 for (ps
= ofp
->psymtabs
; ps
!= NULL
; ps
= ps
->next
)
192 char *name
= ps
->filename
;
193 int len
= strlen (name
);
194 if (!(len
> 2 && (STREQ (&name
[len
- 2], ".h"))))
204 internal_error (__FILE__
, __LINE__
,
205 "select_source_symtab: "
206 "readin pst found and no symtabs.");
210 current_source_symtab
= PSYMTAB_TO_SYMTAB (cs_pst
);
213 if (current_source_symtab
)
216 error ("Can't find a default source file");
220 show_directories (char *ignore
, int from_tty
)
222 puts_filtered ("Source directories searched: ");
223 puts_filtered (source_path
);
224 puts_filtered ("\n");
227 /* Forget what we learned about line positions in source files, and
228 which directories contain them; must check again now since files
229 may be found in a different directory now. */
232 forget_cached_source_info (void)
234 register struct symtab
*s
;
235 register struct objfile
*objfile
;
236 struct partial_symtab
*pst
;
238 for (objfile
= object_files
; objfile
!= NULL
; objfile
= objfile
->next
)
240 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
242 if (s
->line_charpos
!= NULL
)
244 xmfree (objfile
->md
, s
->line_charpos
);
245 s
->line_charpos
= NULL
;
247 if (s
->fullname
!= NULL
)
249 xmfree (objfile
->md
, s
->fullname
);
254 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
256 if (pst
->fullname
!= NULL
)
258 xfree (pst
->fullname
);
259 pst
->fullname
= NULL
;
266 init_source_path (void)
270 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
271 source_path
= xstrdup (buf
);
272 forget_cached_source_info ();
275 /* Add zero or more directories to the front of the source path. */
278 directory_command (char *dirname
, int from_tty
)
281 /* FIXME, this goes to "delete dir"... */
284 if (from_tty
&& query ("Reinitialize source path to empty? "))
292 mod_path (dirname
, &source_path
);
293 last_source_visited
= NULL
;
296 show_directories ((char *) 0, from_tty
);
297 forget_cached_source_info ();
300 /* Add zero or more directories to the front of an arbitrary path. */
303 mod_path (char *dirname
, char **which_path
)
305 char *old
= *which_path
;
311 dirname
= xstrdup (dirname
);
312 make_cleanup (xfree
, dirname
);
316 char *name
= dirname
;
321 char *separator
= strchr (name
, DIRNAME_SEPARATOR
);
322 char *space
= strchr (name
, ' ');
323 char *tab
= strchr (name
, '\t');
325 if (separator
== 0 && space
== 0 && tab
== 0)
326 p
= dirname
= name
+ strlen (name
);
330 if (separator
!= 0 && (p
== 0 || separator
< p
))
332 if (space
!= 0 && (p
== 0 || space
< p
))
334 if (tab
!= 0 && (p
== 0 || tab
< p
))
337 while (*dirname
== DIRNAME_SEPARATOR
344 if (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
345 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
346 /* On MS-DOS and MS-Windows, h:\ is different from h: */
347 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
349 && IS_DIR_SEPARATOR (p
[-1]))
350 /* Sigh. "foo/" => "foo" */
354 while (p
> name
&& p
[-1] == '.')
358 /* "." => getwd (). */
359 name
= current_directory
;
362 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
372 /* "...foo/." => "...foo". */
383 name
= tilde_expand (name
);
384 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
385 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
386 name
= concat (name
, ".", NULL
);
388 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
389 name
= concat (current_directory
, SLASH_STRING
, name
, NULL
);
391 name
= savestring (name
, p
- name
);
392 make_cleanup (xfree
, name
);
394 /* Unless it's a variable, check existence. */
397 /* These are warnings, not errors, since we don't want a
398 non-existent directory in a .gdbinit file to stop processing
399 of the .gdbinit file.
401 Whether they get added to the path is more debatable. Current
402 answer is yes, in case the user wants to go make the directory
403 or whatever. If the directory continues to not exist/not be
404 a directory/etc, then having them in the path should be
406 if (stat (name
, &st
) < 0)
408 int save_errno
= errno
;
409 fprintf_unfiltered (gdb_stderr
, "Warning: ");
410 print_sys_errmsg (name
, save_errno
);
412 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
413 warning ("%s is not a directory.", name
);
418 register unsigned int len
= strlen (name
);
423 /* FIXME: strncmp loses in interesting ways on MS-DOS and
424 MS-Windows because of case-insensitivity and two different
425 but functionally identical slash characters. We need a
426 special filesystem-dependent file-name comparison function.
428 Actually, even on Unix I would use realpath() or its work-
429 alike before comparing. Then all the code above which
430 removes excess slashes and dots could simply go away. */
431 if (!strncmp (p
, name
, len
)
432 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
434 /* Found it in the search path, remove old copy */
436 p
--; /* Back over leading separator */
437 if (prefix
> p
- *which_path
)
438 goto skip_dup
; /* Same dir twice in one cmd */
439 strcpy (p
, &p
[len
+ 1]); /* Copy from next \0 or : */
441 p
= strchr (p
, DIRNAME_SEPARATOR
);
451 tinybuf
[0] = DIRNAME_SEPARATOR
;
454 /* If we have already tacked on a name(s) in this command, be sure they stay on the front as we tack on some more. */
461 temp
= concat (old
, tinybuf
, name
, NULL
);
463 *which_path
= concat (temp
, "", &old
[prefix
], NULL
);
464 prefix
= strlen (temp
);
469 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
), old
, NULL
);
470 prefix
= strlen (name
);
478 while (*dirname
!= '\0');
483 source_info (char *ignore
, int from_tty
)
485 register struct symtab
*s
= current_source_symtab
;
489 printf_filtered ("No current source file.\n");
492 printf_filtered ("Current source file is %s\n", s
->filename
);
494 printf_filtered ("Compilation directory is %s\n", s
->dirname
);
496 printf_filtered ("Located in %s\n", s
->fullname
);
498 printf_filtered ("Contains %d line%s.\n", s
->nlines
,
499 s
->nlines
== 1 ? "" : "s");
501 printf_filtered ("Source language is %s.\n", language_str (s
->language
));
502 printf_filtered ("Compiled with %s debugging format.\n", s
->debugformat
);
506 /* Return True if the file NAME exists and is a regular file */
508 is_regular_file (const char *name
)
511 const int status
= stat (name
, &st
);
513 /* Stat should never fail except when the file does not exist.
514 If stat fails, analyze the source of error and return True
515 unless the file does not exist, to avoid returning false results
516 on obscure systems where stat does not work as expected.
519 return (errno
!= ENOENT
);
521 return S_ISREG (st
.st_mode
);
524 /* Open a file named STRING, searching path PATH (dir names sep by some char)
525 using mode MODE and protection bits PROT in the calls to open.
527 If TRY_CWD_FIRST, try to open ./STRING before searching PATH.
528 (ie pretend the first element of PATH is "."). This also indicates
529 that a slash in STRING disables searching of the path (this is
530 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
531 get that particular version of foo or an error message).
533 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
534 the actual file opened (this string will always start with a "/"). We
535 have to take special pains to avoid doubling the "/" between the directory
536 and the file, sigh! Emacs gets confuzzed by this when we print the
539 If a file is found, return the descriptor.
540 Otherwise, return -1, with errno set for the last name we tried to open. */
542 /* >>>> This should only allow files of certain types,
543 >>>> eg executable, non-directory */
545 openp (const char *path
, int try_cwd_first
, const char *string
,
547 char **filename_opened
)
550 register char *filename
;
559 #if defined(_WIN32) || defined(__CYGWIN__)
563 if ((try_cwd_first
|| IS_ABSOLUTE_PATH (string
)) && is_regular_file (string
))
566 filename
= alloca (strlen (string
) + 1);
567 strcpy (filename
, string
);
568 fd
= open (filename
, mode
, prot
);
571 for (i
= 0; string
[i
]; i
++)
572 if (IS_DIR_SEPARATOR (string
[i
]))
577 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
580 alloclen
= strlen (path
) + strlen (string
) + 2;
581 filename
= alloca (alloclen
);
583 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
585 p1
= strchr (p
, DIRNAME_SEPARATOR
);
591 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
592 && p
[2] == 'w' && p
[3] == 'd')
594 /* Name is $cwd -- insert current directory name instead. */
597 /* First, realloc the filename buffer if too short. */
598 len
= strlen (current_directory
);
599 newlen
= len
+ strlen (string
) + 2;
600 if (newlen
> alloclen
)
603 filename
= alloca (alloclen
);
605 strcpy (filename
, current_directory
);
609 /* Normal file name in path -- just use it. */
610 strncpy (filename
, p
, len
);
614 /* Remove trailing slashes */
615 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
618 strcat (filename
+ len
, SLASH_STRING
);
619 strcat (filename
, string
);
621 if (is_regular_file (filename
))
623 fd
= open (filename
, mode
);
632 /* If a file was opened, canonicalize its filename. Use xfullpath
633 rather than gdb_realpath to avoid resolving the basename part
634 of filenames when the associated file is a symbolic link. This
635 fixes a potential inconsistency between the filenames known to
636 GDB and the filenames it prints in the annotations. */
638 *filename_opened
= NULL
;
639 else if (IS_ABSOLUTE_PATH (filename
))
640 *filename_opened
= xfullpath (filename
);
643 /* Beware the // my son, the Emacs barfs, the botch that catch... */
645 char *f
= concat (current_directory
,
646 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
649 *filename_opened
= xfullpath (f
);
658 /* This is essentially a convenience, for clients that want the behaviour
659 of openp, using source_path, but that really don't want the file to be
660 opened but want instead just to know what the full pathname is (as
661 qualified against source_path).
663 The current working directory is searched first.
665 If the file was found, this function returns 1, and FULL_PATHNAME is
666 set to the fully-qualified pathname.
668 Else, this functions returns 0, and FULL_PATHNAME is set to NULL.
671 source_full_path_of (char *filename
, char **full_pathname
)
675 fd
= openp (source_path
, 1, filename
, O_RDONLY
, 0, full_pathname
);
678 *full_pathname
= NULL
;
687 /* Open a source file given a symtab S. Returns a file descriptor or
688 negative number for error. */
691 open_source_file (struct symtab
*s
)
693 char *path
= source_path
;
698 /* Quick way out if we already know its full name */
701 result
= open (s
->fullname
, OPEN_MODE
);
704 /* Didn't work -- free old one, try again. */
705 xmfree (s
->objfile
->md
, s
->fullname
);
709 if (s
->dirname
!= NULL
)
711 /* Replace a path entry of $cdir with the compilation directory name */
713 /* We cast strstr's result in case an ANSIhole has made it const,
714 which produces a "required warning" when assigned to a nonconst. */
715 p
= (char *) strstr (source_path
, "$cdir");
716 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
717 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
722 alloca (strlen (source_path
) + 1 + strlen (s
->dirname
) + 1);
723 len
= p
- source_path
;
724 strncpy (path
, source_path
, len
); /* Before $cdir */
725 strcpy (path
+ len
, s
->dirname
); /* new stuff */
726 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
730 result
= openp (path
, 0, s
->filename
, OPEN_MODE
, 0, &s
->fullname
);
733 /* Didn't work. Try using just the basename. */
734 p
= lbasename (s
->filename
);
735 if (p
!= s
->filename
)
736 result
= openp (path
, 0, p
, OPEN_MODE
, 0, &s
->fullname
);
741 fullname
= s
->fullname
;
742 s
->fullname
= mstrsave (s
->objfile
->md
, s
->fullname
);
748 /* Return the path to the source file associated with symtab. Returns NULL
752 symtab_to_filename (struct symtab
*s
)
759 /* If we've seen the file before, just return fullname. */
764 /* Try opening the file to setup fullname */
766 fd
= open_source_file (s
);
768 return s
->filename
; /* File not found. Just use short name */
770 /* Found the file. Cleanup and return the full name */
777 /* Create and initialize the table S->line_charpos that records
778 the positions of the lines in the source file, which is assumed
779 to be open on descriptor DESC.
780 All set S->nlines to the number of such lines. */
783 find_source_lines (struct symtab
*s
, int desc
)
786 register char *data
, *p
, *end
;
788 int lines_allocated
= 1000;
793 line_charpos
= (int *) xmmalloc (s
->objfile
->md
,
794 lines_allocated
* sizeof (int));
795 if (fstat (desc
, &st
) < 0)
796 perror_with_name (s
->filename
);
798 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
799 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
801 mtime
= bfd_get_mtime (exec_bfd
);
803 if (mtime
&& mtime
< st
.st_mtime
)
805 warning ("Source file is more recent than executable.\n");
808 #ifdef LSEEK_NOT_LINEAR
812 /* Have to read it byte by byte to find out where the chars live */
814 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
816 while (myread (desc
, &c
, 1) > 0)
820 if (nlines
== lines_allocated
)
822 lines_allocated
*= 2;
824 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
825 sizeof (int) * lines_allocated
);
827 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
831 #else /* lseek linear. */
833 struct cleanup
*old_cleanups
;
835 /* st_size might be a large type, but we only support source files whose
836 size fits in an int. */
837 size
= (int) st
.st_size
;
839 /* Use malloc, not alloca, because this may be pretty large, and we may
840 run into various kinds of limits on stack size. */
841 data
= (char *) xmalloc (size
);
842 old_cleanups
= make_cleanup (xfree
, data
);
844 /* Reassign `size' to result of read for systems where \r\n -> \n. */
845 size
= myread (desc
, data
, size
);
847 perror_with_name (s
->filename
);
855 /* A newline at the end does not start a new line. */
858 if (nlines
== lines_allocated
)
860 lines_allocated
*= 2;
862 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
863 sizeof (int) * lines_allocated
);
865 line_charpos
[nlines
++] = p
- data
;
868 do_cleanups (old_cleanups
);
870 #endif /* lseek linear. */
873 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
874 nlines
* sizeof (int));
878 /* Return the character position of a line LINE in symtab S.
879 Return 0 if anything is invalid. */
881 #if 0 /* Currently unused */
884 source_line_charpos (struct symtab
*s
, int line
)
888 if (!s
->line_charpos
|| line
<= 0)
890 if (line
> s
->nlines
)
892 return s
->line_charpos
[line
- 1];
895 /* Return the line number of character position POS in symtab S. */
898 source_charpos_line (register struct symtab
*s
, register int chr
)
900 register int line
= 0;
903 if (s
== 0 || s
->line_charpos
== 0)
905 lnp
= s
->line_charpos
;
906 /* Files are usually short, so sequential search is Ok */
907 while (line
< s
->nlines
&& *lnp
<= chr
)
912 if (line
>= s
->nlines
)
920 /* Get full pathname and line number positions for a symtab.
921 Return nonzero if line numbers may have changed.
922 Set *FULLNAME to actual name of the file as found by `openp',
923 or to 0 if the file is not found. */
926 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
928 register int desc
, linenums_changed
= 0;
930 desc
= open_source_file (s
);
938 *fullname
= s
->fullname
;
939 if (s
->line_charpos
== 0)
940 linenums_changed
= 1;
941 if (linenums_changed
)
942 find_source_lines (s
, desc
);
944 return linenums_changed
;
947 /* Print text describing the full name of the source file S
948 and the line number LINE and its corresponding character position.
949 The text starts with two Ctrl-z so that the Emacs-GDB interface
952 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
954 Return 1 if successful, 0 if could not find the file. */
957 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
960 if (s
->line_charpos
== 0)
961 get_filename_and_charpos (s
, (char **) NULL
);
962 if (s
->fullname
== 0)
964 if (line
> s
->nlines
)
965 /* Don't index off the end of the line_charpos array. */
967 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
970 current_source_line
= line
;
971 first_line_listed
= line
;
972 last_line_listed
= line
;
973 current_source_symtab
= s
;
978 /* Print source lines from the file of symtab S,
979 starting with line number LINE and stopping before line number STOPLINE. */
981 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
984 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
988 register FILE *stream
;
989 int nlines
= stopline
- line
;
991 /* Regardless of whether we can open the file, set current_source_symtab. */
992 current_source_symtab
= s
;
993 current_source_line
= line
;
994 first_line_listed
= line
;
996 /* If printing of source lines is disabled, just print file and line number */
997 if (ui_out_test_flags (uiout
, ui_source_list
))
999 /* Only prints "No such file or directory" once */
1000 if ((s
!= last_source_visited
) || (!last_source_error
))
1002 last_source_visited
= s
;
1003 desc
= open_source_file (s
);
1007 desc
= last_source_error
;
1019 last_source_error
= desc
;
1023 char *name
= alloca (strlen (s
->filename
) + 100);
1024 sprintf (name
, "%d\t%s", line
, s
->filename
);
1025 print_sys_errmsg (name
, errno
);
1028 ui_out_field_int (uiout
, "line", line
);
1029 ui_out_text (uiout
, "\tin ");
1030 ui_out_field_string (uiout
, "file", s
->filename
);
1031 ui_out_text (uiout
, "\n");
1036 last_source_error
= 0;
1038 if (s
->line_charpos
== 0)
1039 find_source_lines (s
, desc
);
1041 if (line
< 1 || line
> s
->nlines
)
1044 error ("Line number %d out of range; %s has %d lines.",
1045 line
, s
->filename
, s
->nlines
);
1048 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1051 perror_with_name (s
->filename
);
1054 stream
= fdopen (desc
, FDOPEN_MODE
);
1057 while (nlines
-- > 0)
1064 last_line_listed
= current_source_line
;
1065 sprintf (buf
, "%d\t", current_source_line
++);
1066 ui_out_text (uiout
, buf
);
1069 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1071 sprintf (buf
, "^%c", c
+ 0100);
1072 ui_out_text (uiout
, buf
);
1075 ui_out_text (uiout
, "^?");
1076 #ifdef CRLF_SOURCE_FILES
1079 /* Skip a \r character, but only before a \n. */
1080 int c1
= fgetc (stream
);
1083 printf_filtered ("^%c", c
+ 0100);
1085 ungetc (c1
, stream
);
1090 sprintf (buf
, "%c", c
);
1091 ui_out_text (uiout
, buf
);
1094 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1100 /* Show source lines from the file of symtab S, starting with line
1101 number LINE and stopping before line number STOPLINE. If this is the
1102 not the command line version, then the source is shown in the source
1103 window otherwise it is simply printed */
1106 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1108 print_source_lines_base (s
, line
, stopline
, noerror
);
1113 /* Print a list of files and line numbers which a user may choose from
1114 in order to list a function which was specified ambiguously (as with
1115 `list classname::overloadedfuncname', for example). The vector in
1116 SALS provides the filenames and line numbers. */
1119 ambiguous_line_spec (struct symtabs_and_lines
*sals
)
1123 for (i
= 0; i
< sals
->nelts
; ++i
)
1124 printf_filtered ("file: \"%s\", line number: %d\n",
1125 sals
->sals
[i
].symtab
->filename
, sals
->sals
[i
].line
);
1129 list_command (char *arg
, int from_tty
)
1131 struct symtabs_and_lines sals
, sals_end
;
1132 struct symtab_and_line sal
, sal_end
;
1138 int linenum_beg
= 0;
1141 if (!have_full_symbols () && !have_partial_symbols ())
1142 error ("No symbol table is loaded. Use the \"file\" command.");
1144 /* Pull in a current source symtab if necessary */
1145 if (current_source_symtab
== 0 &&
1146 (arg
== 0 || arg
[0] == '+' || arg
[0] == '-'))
1147 select_source_symtab (0);
1149 /* "l" or "l +" lists next ten lines. */
1151 if (arg
== 0 || STREQ (arg
, "+"))
1153 if (current_source_symtab
== 0)
1154 error ("No default source file yet. Do \"help list\".");
1155 print_source_lines (current_source_symtab
, current_source_line
,
1156 current_source_line
+ lines_to_list
, 0);
1160 /* "l -" lists previous ten lines, the ones before the ten just listed. */
1161 if (STREQ (arg
, "-"))
1163 if (current_source_symtab
== 0)
1164 error ("No default source file yet. Do \"help list\".");
1165 print_source_lines (current_source_symtab
,
1166 max (first_line_listed
- lines_to_list
, 1),
1167 first_line_listed
, 0);
1171 /* Now if there is only one argument, decode it in SAL
1173 If there are two arguments, decode them in SAL and SAL_END
1174 and clear NO_END; however, if one of the arguments is blank,
1175 set DUMMY_BEG or DUMMY_END to record that fact. */
1182 sals
= decode_line_1 (&arg1
, 0, 0, 0, 0);
1188 ambiguous_line_spec (&sals
);
1197 /* Record whether the BEG arg is all digits. */
1199 for (p
= arg
; p
!= arg1
&& *p
>= '0' && *p
<= '9'; p
++);
1200 linenum_beg
= (p
== arg1
);
1202 while (*arg1
== ' ' || *arg1
== '\t')
1208 while (*arg1
== ' ' || *arg1
== '\t')
1215 sals_end
= decode_line_1 (&arg1
, 0, 0, 0, 0);
1217 sals_end
= decode_line_1 (&arg1
, 0, sal
.symtab
, sal
.line
, 0);
1218 if (sals_end
.nelts
== 0)
1220 if (sals_end
.nelts
> 1)
1222 ambiguous_line_spec (&sals_end
);
1223 xfree (sals_end
.sals
);
1226 sal_end
= sals_end
.sals
[0];
1227 xfree (sals_end
.sals
);
1232 error ("Junk at end of line specification.");
1234 if (!no_end
&& !dummy_beg
&& !dummy_end
1235 && sal
.symtab
!= sal_end
.symtab
)
1236 error ("Specified start and end are in different files.");
1237 if (dummy_beg
&& dummy_end
)
1238 error ("Two empty args do not say what lines to list.");
1240 /* if line was specified by address,
1241 first print exactly which line, and which file.
1242 In this case, sal.symtab == 0 means address is outside
1243 of all known source files, not that user failed to give a filename. */
1246 if (sal
.symtab
== 0)
1247 /* FIXME-32x64--assumes sal.pc fits in long. */
1248 error ("No source file for address %s.",
1249 local_hex_string ((unsigned long) sal
.pc
));
1250 sym
= find_pc_function (sal
.pc
);
1253 print_address_numeric (sal
.pc
, 1, gdb_stdout
);
1254 printf_filtered (" is in ");
1255 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), gdb_stdout
);
1256 printf_filtered (" (%s:%d).\n", sal
.symtab
->filename
, sal
.line
);
1260 print_address_numeric (sal
.pc
, 1, gdb_stdout
);
1261 printf_filtered (" is at %s:%d.\n",
1262 sal
.symtab
->filename
, sal
.line
);
1266 /* If line was not specified by just a line number,
1267 and it does not imply a symtab, it must be an undebuggable symbol
1268 which means no source code. */
1270 if (!linenum_beg
&& sal
.symtab
== 0)
1271 error ("No line number known for %s.", arg
);
1273 /* If this command is repeated with RET,
1274 turn it into the no-arg variant. */
1279 if (dummy_beg
&& sal_end
.symtab
== 0)
1280 error ("No default source file yet. Do \"help list\".");
1282 print_source_lines (sal_end
.symtab
,
1283 max (sal_end
.line
- (lines_to_list
- 1), 1),
1284 sal_end
.line
+ 1, 0);
1285 else if (sal
.symtab
== 0)
1286 error ("No default source file yet. Do \"help list\".");
1289 int first_line
= sal
.line
- lines_to_list
/ 2;
1291 if (first_line
< 1) first_line
= 1;
1293 print_source_lines (sal
.symtab
, first_line
, first_line
+ lines_to_list
,
1297 print_source_lines (sal
.symtab
, sal
.line
,
1299 ? sal
.line
+ lines_to_list
1300 : sal_end
.line
+ 1),
1304 /* Print info on range of pc's in a specified line. */
1307 line_info (char *arg
, int from_tty
)
1309 struct symtabs_and_lines sals
;
1310 struct symtab_and_line sal
;
1311 CORE_ADDR start_pc
, end_pc
;
1314 INIT_SAL (&sal
); /* initialize to zeroes */
1318 sal
.symtab
= current_source_symtab
;
1319 sal
.line
= last_line_listed
;
1321 sals
.sals
= (struct symtab_and_line
*)
1322 xmalloc (sizeof (struct symtab_and_line
));
1327 sals
= decode_line_spec_1 (arg
, 0);
1332 /* C++ More than one line may have been specified, as when the user
1333 specifies an overloaded function name. Print info on them all. */
1334 for (i
= 0; i
< sals
.nelts
; i
++)
1338 if (sal
.symtab
== 0)
1340 printf_filtered ("No line number information available");
1343 /* This is useful for "info line *0x7f34". If we can't tell the
1344 user about a source line, at least let them have the symbolic
1346 printf_filtered (" for address ");
1348 print_address (sal
.pc
, gdb_stdout
);
1351 printf_filtered (".");
1352 printf_filtered ("\n");
1354 else if (sal
.line
> 0
1355 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1357 if (start_pc
== end_pc
)
1359 printf_filtered ("Line %d of \"%s\"",
1360 sal
.line
, sal
.symtab
->filename
);
1362 printf_filtered (" is at address ");
1363 print_address (start_pc
, gdb_stdout
);
1365 printf_filtered (" but contains no code.\n");
1369 printf_filtered ("Line %d of \"%s\"",
1370 sal
.line
, sal
.symtab
->filename
);
1372 printf_filtered (" starts at address ");
1373 print_address (start_pc
, gdb_stdout
);
1375 printf_filtered (" and ends at ");
1376 print_address (end_pc
, gdb_stdout
);
1377 printf_filtered (".\n");
1380 /* x/i should display this line's code. */
1381 set_next_address (start_pc
);
1383 /* Repeating "info line" should do the following line. */
1384 last_line_listed
= sal
.line
+ 1;
1386 /* If this is the only line, show the source code. If it could
1387 not find the file, don't do anything special. */
1388 if (annotation_level
&& sals
.nelts
== 1)
1389 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1392 /* Is there any case in which we get here, and have an address
1393 which the user would want to see? If we have debugging symbols
1394 and no line numbers? */
1395 printf_filtered ("Line number %d is out of range for \"%s\".\n",
1396 sal
.line
, sal
.symtab
->filename
);
1401 /* Commands to search the source file for a regexp. */
1405 forward_search_command (char *regex
, int from_tty
)
1409 register FILE *stream
;
1413 line
= last_line_listed
+ 1;
1415 msg
= (char *) re_comp (regex
);
1419 if (current_source_symtab
== 0)
1420 select_source_symtab (0);
1422 desc
= open_source_file (current_source_symtab
);
1424 perror_with_name (current_source_symtab
->filename
);
1426 if (current_source_symtab
->line_charpos
== 0)
1427 find_source_lines (current_source_symtab
, desc
);
1429 if (line
< 1 || line
> current_source_symtab
->nlines
)
1432 error ("Expression not found");
1435 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1438 perror_with_name (current_source_symtab
->filename
);
1441 stream
= fdopen (desc
, FDOPEN_MODE
);
1445 static char *buf
= NULL
;
1447 int cursize
, newsize
;
1450 buf
= xmalloc (cursize
);
1459 if (p
- buf
== cursize
)
1461 newsize
= cursize
+ cursize
/ 2;
1462 buf
= xrealloc (buf
, newsize
);
1467 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1469 #ifdef CRLF_SOURCE_FILES
1470 /* Remove the \r, if any, at the end of the line, otherwise
1471 regular expressions that end with $ or \n won't work. */
1472 if (p
- buf
> 1 && p
[-2] == '\r')
1479 /* we now have a source line in buf, null terminate and match */
1481 if (re_exec (buf
) > 0)
1485 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1486 set_internalvar (lookup_internalvar ("_"),
1487 value_from_longest (builtin_type_int
,
1489 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1495 printf_filtered ("Expression not found\n");
1501 reverse_search_command (char *regex
, int from_tty
)
1505 register FILE *stream
;
1509 line
= last_line_listed
- 1;
1511 msg
= (char *) re_comp (regex
);
1515 if (current_source_symtab
== 0)
1516 select_source_symtab (0);
1518 desc
= open_source_file (current_source_symtab
);
1520 perror_with_name (current_source_symtab
->filename
);
1522 if (current_source_symtab
->line_charpos
== 0)
1523 find_source_lines (current_source_symtab
, desc
);
1525 if (line
< 1 || line
> current_source_symtab
->nlines
)
1528 error ("Expression not found");
1531 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1534 perror_with_name (current_source_symtab
->filename
);
1537 stream
= fdopen (desc
, FDOPEN_MODE
);
1541 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1542 char buf
[4096]; /* Should be reasonable??? */
1543 register char *p
= buf
;
1552 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1554 #ifdef CRLF_SOURCE_FILES
1555 /* Remove the \r, if any, at the end of the line, otherwise
1556 regular expressions that end with $ or \n won't work. */
1557 if (p
- buf
> 1 && p
[-2] == '\r')
1564 /* We now have a source line in buf; null terminate and match. */
1566 if (re_exec (buf
) > 0)
1570 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1571 set_internalvar (lookup_internalvar ("_"),
1572 value_from_longest (builtin_type_int
,
1574 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1578 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1581 perror_with_name (current_source_symtab
->filename
);
1585 printf_filtered ("Expression not found\n");
1591 _initialize_source (void)
1593 struct cmd_list_element
*c
;
1594 current_source_symtab
= 0;
1595 init_source_path ();
1597 /* The intention is to use POSIX Basic Regular Expressions.
1598 Always use the GNU regex routine for consistency across all hosts.
1599 Our current GNU regex.c does not have all the POSIX features, so this is
1600 just an approximation. */
1601 re_set_syntax (RE_SYNTAX_GREP
);
1603 c
= add_cmd ("directory", class_files
, directory_command
,
1604 "Add directory DIR to beginning of search path for source files.\n\
1605 Forget cached info on source file locations and line positions.\n\
1606 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1607 directory in which the source file was compiled into object code.\n\
1608 With no argument, reset the search path to $cdir:$cwd, the default.",
1612 add_com_alias ("use", "directory", class_files
, 0);
1614 set_cmd_completer (c
, filename_completer
);
1616 add_cmd ("directories", no_class
, show_directories
,
1617 "Current search path for finding source files.\n\
1618 $cwd in the path means the current working directory.\n\
1619 $cdir in the path means the compilation directory of the source file.",
1624 add_com_alias ("D", "directory", class_files
, 0);
1625 add_cmd ("ld", no_class
, show_directories
,
1626 "Current search path for finding source files.\n\
1627 $cwd in the path means the current working directory.\n\
1628 $cdir in the path means the compilation directory of the source file.",
1632 add_info ("source", source_info
,
1633 "Information about the current source file.");
1635 add_info ("line", line_info
,
1636 concat ("Core addresses of the code for a source line.\n\
1637 Line can be specified as\n\
1638 LINENUM, to list around that line in current file,\n\
1639 FILE:LINENUM, to list around that line in that file,\n\
1640 FUNCTION, to list around beginning of that function,\n\
1641 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1643 Default is to describe the last source line that was listed.\n\n\
1644 This sets the default address for \"x\" to the line's first instruction\n\
1645 so that \"x/i\" suffices to start examining the machine code.\n\
1646 The address is also stored as the value of \"$_\".", NULL
));
1648 add_com ("forward-search", class_files
, forward_search_command
,
1649 "Search for regular expression (see regex(3)) from last line listed.\n\
1650 The matching line number is also stored as the value of \"$_\".");
1651 add_com_alias ("search", "forward-search", class_files
, 0);
1653 add_com ("reverse-search", class_files
, reverse_search_command
,
1654 "Search backward for regular expression (see regex(3)) from last line listed.\n\
1655 The matching line number is also stored as the value of \"$_\".");
1659 add_com_alias ("/", "forward-search", class_files
, 0);
1660 add_com_alias ("?", "reverse-search", class_files
, 0);
1663 add_com ("list", class_files
, list_command
,
1664 concat ("List specified function or line.\n\
1665 With no argument, lists ten more lines after or around previous listing.\n\
1666 \"list -\" lists the ten lines before a previous ten-line listing.\n\
1667 One argument specifies a line, and ten lines are listed around that line.\n\
1668 Two arguments with comma between specify starting and ending lines to list.\n\
1670 Lines can be specified in these ways:\n\
1671 LINENUM, to list around that line in current file,\n\
1672 FILE:LINENUM, to list around that line in that file,\n\
1673 FUNCTION, to list around beginning of that function,\n\
1674 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1675 *ADDRESS, to list around the line containing that address.\n\
1676 With two args if one is empty it stands for ten lines away from the other arg.", NULL
));
1679 add_com_alias ("l", "list", class_files
, 1);
1681 add_com_alias ("v", "list", class_files
, 1);
1684 add_com_alias ("file", "list", class_files
, 1);
1687 (add_set_cmd ("listsize", class_support
, var_uinteger
,
1688 (char *) &lines_to_list
,
1689 "Set number of source lines gdb will list by default.",
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