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
);
507 /* Open a file named STRING, searching path PATH (dir names sep by some char)
508 using mode MODE and protection bits PROT in the calls to open.
510 If TRY_CWD_FIRST, try to open ./STRING before searching PATH.
511 (ie pretend the first element of PATH is "."). This also indicates
512 that a slash in STRING disables searching of the path (this is
513 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
514 get that particular version of foo or an error message).
516 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
517 the actual file opened (this string will always start with a "/". We
518 have to take special pains to avoid doubling the "/" between the directory
519 and the file, sigh! Emacs gets confuzzed by this when we print the
522 If a file is found, return the descriptor.
523 Otherwise, return -1, with errno set for the last name we tried to open. */
525 /* >>>> This should only allow files of certain types,
526 >>>> eg executable, non-directory */
528 openp (const char *path
, int try_cwd_first
, const char *string
,
530 char **filename_opened
)
533 register char *filename
;
542 #if defined(_WIN32) || defined(__CYGWIN__)
546 if (try_cwd_first
|| IS_ABSOLUTE_PATH (string
))
549 filename
= alloca (strlen (string
) + 1);
550 strcpy (filename
, string
);
551 fd
= open (filename
, mode
, prot
);
554 for (i
= 0; string
[i
]; i
++)
555 if (IS_DIR_SEPARATOR (string
[i
]))
560 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
563 alloclen
= strlen (path
) + strlen (string
) + 2;
564 filename
= alloca (alloclen
);
566 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
568 p1
= strchr (p
, DIRNAME_SEPARATOR
);
574 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
575 && p
[2] == 'w' && p
[3] == 'd')
577 /* Name is $cwd -- insert current directory name instead. */
580 /* First, realloc the filename buffer if too short. */
581 len
= strlen (current_directory
);
582 newlen
= len
+ strlen (string
) + 2;
583 if (newlen
> alloclen
)
586 filename
= alloca (alloclen
);
588 strcpy (filename
, current_directory
);
592 /* Normal file name in path -- just use it. */
593 strncpy (filename
, p
, len
);
597 /* Remove trailing slashes */
598 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
601 strcat (filename
+ len
, SLASH_STRING
);
602 strcat (filename
, string
);
604 fd
= open (filename
, mode
);
613 *filename_opened
= NULL
;
614 else if (IS_ABSOLUTE_PATH (filename
))
615 *filename_opened
= gdb_realpath (filename
);
618 /* Beware the // my son, the Emacs barfs, the botch that catch... */
620 char *f
= concat (current_directory
,
621 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
624 *filename_opened
= gdb_realpath (f
);
633 /* This is essentially a convenience, for clients that want the behaviour
634 of openp, using source_path, but that really don't want the file to be
635 opened but want instead just to know what the full pathname is (as
636 qualified against source_path).
638 The current working directory is searched first.
640 If the file was found, this function returns 1, and FULL_PATHNAME is
641 set to the fully-qualified pathname.
643 Else, this functions returns 0, and FULL_PATHNAME is set to NULL.
646 source_full_path_of (char *filename
, char **full_pathname
)
650 fd
= openp (source_path
, 1, filename
, O_RDONLY
, 0, full_pathname
);
653 *full_pathname
= NULL
;
662 /* Open a source file given a symtab S. Returns a file descriptor or
663 negative number for error. */
666 open_source_file (struct symtab
*s
)
668 char *path
= source_path
;
673 /* Quick way out if we already know its full name */
676 result
= open (s
->fullname
, OPEN_MODE
);
679 /* Didn't work -- free old one, try again. */
680 xmfree (s
->objfile
->md
, s
->fullname
);
684 if (s
->dirname
!= NULL
)
686 /* Replace a path entry of $cdir with the compilation directory name */
688 /* We cast strstr's result in case an ANSIhole has made it const,
689 which produces a "required warning" when assigned to a nonconst. */
690 p
= (char *) strstr (source_path
, "$cdir");
691 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
692 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
697 alloca (strlen (source_path
) + 1 + strlen (s
->dirname
) + 1);
698 len
= p
- source_path
;
699 strncpy (path
, source_path
, len
); /* Before $cdir */
700 strcpy (path
+ len
, s
->dirname
); /* new stuff */
701 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
705 result
= openp (path
, 0, s
->filename
, OPEN_MODE
, 0, &s
->fullname
);
708 /* Didn't work. Try using just the basename. */
709 p
= lbasename (s
->filename
);
710 if (p
!= s
->filename
)
711 result
= openp (path
, 0, p
, OPEN_MODE
, 0, &s
->fullname
);
716 fullname
= s
->fullname
;
717 s
->fullname
= mstrsave (s
->objfile
->md
, s
->fullname
);
723 /* Return the path to the source file associated with symtab. Returns NULL
727 symtab_to_filename (struct symtab
*s
)
734 /* If we've seen the file before, just return fullname. */
739 /* Try opening the file to setup fullname */
741 fd
= open_source_file (s
);
743 return s
->filename
; /* File not found. Just use short name */
745 /* Found the file. Cleanup and return the full name */
752 /* Create and initialize the table S->line_charpos that records
753 the positions of the lines in the source file, which is assumed
754 to be open on descriptor DESC.
755 All set S->nlines to the number of such lines. */
758 find_source_lines (struct symtab
*s
, int desc
)
761 register char *data
, *p
, *end
;
763 int lines_allocated
= 1000;
768 line_charpos
= (int *) xmmalloc (s
->objfile
->md
,
769 lines_allocated
* sizeof (int));
770 if (fstat (desc
, &st
) < 0)
771 perror_with_name (s
->filename
);
773 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
774 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
776 mtime
= bfd_get_mtime (exec_bfd
);
778 if (mtime
&& mtime
< st
.st_mtime
)
780 warning ("Source file is more recent than executable.\n");
783 #ifdef LSEEK_NOT_LINEAR
787 /* Have to read it byte by byte to find out where the chars live */
789 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
791 while (myread (desc
, &c
, 1) > 0)
795 if (nlines
== lines_allocated
)
797 lines_allocated
*= 2;
799 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
800 sizeof (int) * lines_allocated
);
802 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
806 #else /* lseek linear. */
808 struct cleanup
*old_cleanups
;
810 /* st_size might be a large type, but we only support source files whose
811 size fits in an int. */
812 size
= (int) st
.st_size
;
814 /* Use malloc, not alloca, because this may be pretty large, and we may
815 run into various kinds of limits on stack size. */
816 data
= (char *) xmalloc (size
);
817 old_cleanups
= make_cleanup (xfree
, data
);
819 /* Reassign `size' to result of read for systems where \r\n -> \n. */
820 size
= myread (desc
, data
, size
);
822 perror_with_name (s
->filename
);
830 /* A newline at the end does not start a new line. */
833 if (nlines
== lines_allocated
)
835 lines_allocated
*= 2;
837 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
838 sizeof (int) * lines_allocated
);
840 line_charpos
[nlines
++] = p
- data
;
843 do_cleanups (old_cleanups
);
845 #endif /* lseek linear. */
848 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
849 nlines
* sizeof (int));
853 /* Return the character position of a line LINE in symtab S.
854 Return 0 if anything is invalid. */
856 #if 0 /* Currently unused */
859 source_line_charpos (struct symtab
*s
, int line
)
863 if (!s
->line_charpos
|| line
<= 0)
865 if (line
> s
->nlines
)
867 return s
->line_charpos
[line
- 1];
870 /* Return the line number of character position POS in symtab S. */
873 source_charpos_line (register struct symtab
*s
, register int chr
)
875 register int line
= 0;
878 if (s
== 0 || s
->line_charpos
== 0)
880 lnp
= s
->line_charpos
;
881 /* Files are usually short, so sequential search is Ok */
882 while (line
< s
->nlines
&& *lnp
<= chr
)
887 if (line
>= s
->nlines
)
895 /* Get full pathname and line number positions for a symtab.
896 Return nonzero if line numbers may have changed.
897 Set *FULLNAME to actual name of the file as found by `openp',
898 or to 0 if the file is not found. */
901 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
903 register int desc
, linenums_changed
= 0;
905 desc
= open_source_file (s
);
913 *fullname
= s
->fullname
;
914 if (s
->line_charpos
== 0)
915 linenums_changed
= 1;
916 if (linenums_changed
)
917 find_source_lines (s
, desc
);
919 return linenums_changed
;
922 /* Print text describing the full name of the source file S
923 and the line number LINE and its corresponding character position.
924 The text starts with two Ctrl-z so that the Emacs-GDB interface
927 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
929 Return 1 if successful, 0 if could not find the file. */
932 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
935 if (s
->line_charpos
== 0)
936 get_filename_and_charpos (s
, (char **) NULL
);
937 if (s
->fullname
== 0)
939 if (line
> s
->nlines
)
940 /* Don't index off the end of the line_charpos array. */
942 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
945 current_source_line
= line
;
946 first_line_listed
= line
;
947 last_line_listed
= line
;
948 current_source_symtab
= s
;
953 /* Print source lines from the file of symtab S,
954 starting with line number LINE and stopping before line number STOPLINE. */
956 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
959 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
963 register FILE *stream
;
964 int nlines
= stopline
- line
;
966 /* Regardless of whether we can open the file, set current_source_symtab. */
967 current_source_symtab
= s
;
968 current_source_line
= line
;
969 first_line_listed
= line
;
971 /* If printing of source lines is disabled, just print file and line number */
972 if (ui_out_test_flags (uiout
, ui_source_list
))
974 /* Only prints "No such file or directory" once */
975 if ((s
!= last_source_visited
) || (!last_source_error
))
977 last_source_visited
= s
;
978 desc
= open_source_file (s
);
982 desc
= last_source_error
;
994 last_source_error
= desc
;
998 char *name
= alloca (strlen (s
->filename
) + 100);
999 sprintf (name
, "%d\t%s", line
, s
->filename
);
1000 print_sys_errmsg (name
, errno
);
1003 ui_out_field_int (uiout
, "line", line
);
1004 ui_out_text (uiout
, "\tin ");
1005 ui_out_field_string (uiout
, "file", s
->filename
);
1006 ui_out_text (uiout
, "\n");
1011 last_source_error
= 0;
1013 if (s
->line_charpos
== 0)
1014 find_source_lines (s
, desc
);
1016 if (line
< 1 || line
> s
->nlines
)
1019 error ("Line number %d out of range; %s has %d lines.",
1020 line
, s
->filename
, s
->nlines
);
1023 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1026 perror_with_name (s
->filename
);
1029 stream
= fdopen (desc
, FDOPEN_MODE
);
1032 while (nlines
-- > 0)
1039 last_line_listed
= current_source_line
;
1040 sprintf (buf
, "%d\t", current_source_line
++);
1041 ui_out_text (uiout
, buf
);
1044 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1046 sprintf (buf
, "^%c", c
+ 0100);
1047 ui_out_text (uiout
, buf
);
1050 ui_out_text (uiout
, "^?");
1051 #ifdef CRLF_SOURCE_FILES
1054 /* Skip a \r character, but only before a \n. */
1055 int c1
= fgetc (stream
);
1058 printf_filtered ("^%c", c
+ 0100);
1060 ungetc (c1
, stream
);
1065 sprintf (buf
, "%c", c
);
1066 ui_out_text (uiout
, buf
);
1069 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1075 /* Show source lines from the file of symtab S, starting with line
1076 number LINE and stopping before line number STOPLINE. If this is the
1077 not the command line version, then the source is shown in the source
1078 window otherwise it is simply printed */
1081 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1083 print_source_lines_base (s
, line
, stopline
, noerror
);
1088 /* Print a list of files and line numbers which a user may choose from
1089 in order to list a function which was specified ambiguously (as with
1090 `list classname::overloadedfuncname', for example). The vector in
1091 SALS provides the filenames and line numbers. */
1094 ambiguous_line_spec (struct symtabs_and_lines
*sals
)
1098 for (i
= 0; i
< sals
->nelts
; ++i
)
1099 printf_filtered ("file: \"%s\", line number: %d\n",
1100 sals
->sals
[i
].symtab
->filename
, sals
->sals
[i
].line
);
1104 list_command (char *arg
, int from_tty
)
1106 struct symtabs_and_lines sals
, sals_end
;
1107 struct symtab_and_line sal
, sal_end
;
1113 int linenum_beg
= 0;
1116 if (!have_full_symbols () && !have_partial_symbols ())
1117 error ("No symbol table is loaded. Use the \"file\" command.");
1119 /* Pull in a current source symtab if necessary */
1120 if (current_source_symtab
== 0 &&
1121 (arg
== 0 || arg
[0] == '+' || arg
[0] == '-'))
1122 select_source_symtab (0);
1124 /* "l" or "l +" lists next ten lines. */
1126 if (arg
== 0 || STREQ (arg
, "+"))
1128 if (current_source_symtab
== 0)
1129 error ("No default source file yet. Do \"help list\".");
1130 print_source_lines (current_source_symtab
, current_source_line
,
1131 current_source_line
+ lines_to_list
, 0);
1135 /* "l -" lists previous ten lines, the ones before the ten just listed. */
1136 if (STREQ (arg
, "-"))
1138 if (current_source_symtab
== 0)
1139 error ("No default source file yet. Do \"help list\".");
1140 print_source_lines (current_source_symtab
,
1141 max (first_line_listed
- lines_to_list
, 1),
1142 first_line_listed
, 0);
1146 /* Now if there is only one argument, decode it in SAL
1148 If there are two arguments, decode them in SAL and SAL_END
1149 and clear NO_END; however, if one of the arguments is blank,
1150 set DUMMY_BEG or DUMMY_END to record that fact. */
1157 sals
= decode_line_1 (&arg1
, 0, 0, 0, 0);
1163 ambiguous_line_spec (&sals
);
1172 /* Record whether the BEG arg is all digits. */
1174 for (p
= arg
; p
!= arg1
&& *p
>= '0' && *p
<= '9'; p
++);
1175 linenum_beg
= (p
== arg1
);
1177 while (*arg1
== ' ' || *arg1
== '\t')
1183 while (*arg1
== ' ' || *arg1
== '\t')
1190 sals_end
= decode_line_1 (&arg1
, 0, 0, 0, 0);
1192 sals_end
= decode_line_1 (&arg1
, 0, sal
.symtab
, sal
.line
, 0);
1193 if (sals_end
.nelts
== 0)
1195 if (sals_end
.nelts
> 1)
1197 ambiguous_line_spec (&sals_end
);
1198 xfree (sals_end
.sals
);
1201 sal_end
= sals_end
.sals
[0];
1202 xfree (sals_end
.sals
);
1207 error ("Junk at end of line specification.");
1209 if (!no_end
&& !dummy_beg
&& !dummy_end
1210 && sal
.symtab
!= sal_end
.symtab
)
1211 error ("Specified start and end are in different files.");
1212 if (dummy_beg
&& dummy_end
)
1213 error ("Two empty args do not say what lines to list.");
1215 /* if line was specified by address,
1216 first print exactly which line, and which file.
1217 In this case, sal.symtab == 0 means address is outside
1218 of all known source files, not that user failed to give a filename. */
1221 if (sal
.symtab
== 0)
1222 /* FIXME-32x64--assumes sal.pc fits in long. */
1223 error ("No source file for address %s.",
1224 local_hex_string ((unsigned long) sal
.pc
));
1225 sym
= find_pc_function (sal
.pc
);
1228 print_address_numeric (sal
.pc
, 1, gdb_stdout
);
1229 printf_filtered (" is in ");
1230 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), gdb_stdout
);
1231 printf_filtered (" (%s:%d).\n", sal
.symtab
->filename
, sal
.line
);
1235 print_address_numeric (sal
.pc
, 1, gdb_stdout
);
1236 printf_filtered (" is at %s:%d.\n",
1237 sal
.symtab
->filename
, sal
.line
);
1241 /* If line was not specified by just a line number,
1242 and it does not imply a symtab, it must be an undebuggable symbol
1243 which means no source code. */
1245 if (!linenum_beg
&& sal
.symtab
== 0)
1246 error ("No line number known for %s.", arg
);
1248 /* If this command is repeated with RET,
1249 turn it into the no-arg variant. */
1254 if (dummy_beg
&& sal_end
.symtab
== 0)
1255 error ("No default source file yet. Do \"help list\".");
1257 print_source_lines (sal_end
.symtab
,
1258 max (sal_end
.line
- (lines_to_list
- 1), 1),
1259 sal_end
.line
+ 1, 0);
1260 else if (sal
.symtab
== 0)
1261 error ("No default source file yet. Do \"help list\".");
1264 int first_line
= sal
.line
- lines_to_list
/ 2;
1266 if (first_line
< 1) first_line
= 1;
1268 print_source_lines (sal
.symtab
, first_line
, first_line
+ lines_to_list
,
1272 print_source_lines (sal
.symtab
, sal
.line
,
1274 ? sal
.line
+ lines_to_list
1275 : sal_end
.line
+ 1),
1279 /* Print info on range of pc's in a specified line. */
1282 line_info (char *arg
, int from_tty
)
1284 struct symtabs_and_lines sals
;
1285 struct symtab_and_line sal
;
1286 CORE_ADDR start_pc
, end_pc
;
1289 INIT_SAL (&sal
); /* initialize to zeroes */
1293 sal
.symtab
= current_source_symtab
;
1294 sal
.line
= last_line_listed
;
1296 sals
.sals
= (struct symtab_and_line
*)
1297 xmalloc (sizeof (struct symtab_and_line
));
1302 sals
= decode_line_spec_1 (arg
, 0);
1307 /* C++ More than one line may have been specified, as when the user
1308 specifies an overloaded function name. Print info on them all. */
1309 for (i
= 0; i
< sals
.nelts
; i
++)
1313 if (sal
.symtab
== 0)
1315 printf_filtered ("No line number information available");
1318 /* This is useful for "info line *0x7f34". If we can't tell the
1319 user about a source line, at least let them have the symbolic
1321 printf_filtered (" for address ");
1323 print_address (sal
.pc
, gdb_stdout
);
1326 printf_filtered (".");
1327 printf_filtered ("\n");
1329 else if (sal
.line
> 0
1330 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1332 if (start_pc
== end_pc
)
1334 printf_filtered ("Line %d of \"%s\"",
1335 sal
.line
, sal
.symtab
->filename
);
1337 printf_filtered (" is at address ");
1338 print_address (start_pc
, gdb_stdout
);
1340 printf_filtered (" but contains no code.\n");
1344 printf_filtered ("Line %d of \"%s\"",
1345 sal
.line
, sal
.symtab
->filename
);
1347 printf_filtered (" starts at address ");
1348 print_address (start_pc
, gdb_stdout
);
1350 printf_filtered (" and ends at ");
1351 print_address (end_pc
, gdb_stdout
);
1352 printf_filtered (".\n");
1355 /* x/i should display this line's code. */
1356 set_next_address (start_pc
);
1358 /* Repeating "info line" should do the following line. */
1359 last_line_listed
= sal
.line
+ 1;
1361 /* If this is the only line, show the source code. If it could
1362 not find the file, don't do anything special. */
1363 if (annotation_level
&& sals
.nelts
== 1)
1364 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1367 /* Is there any case in which we get here, and have an address
1368 which the user would want to see? If we have debugging symbols
1369 and no line numbers? */
1370 printf_filtered ("Line number %d is out of range for \"%s\".\n",
1371 sal
.line
, sal
.symtab
->filename
);
1376 /* Commands to search the source file for a regexp. */
1380 forward_search_command (char *regex
, int from_tty
)
1384 register FILE *stream
;
1388 line
= last_line_listed
+ 1;
1390 msg
= (char *) re_comp (regex
);
1394 if (current_source_symtab
== 0)
1395 select_source_symtab (0);
1397 desc
= open_source_file (current_source_symtab
);
1399 perror_with_name (current_source_symtab
->filename
);
1401 if (current_source_symtab
->line_charpos
== 0)
1402 find_source_lines (current_source_symtab
, desc
);
1404 if (line
< 1 || line
> current_source_symtab
->nlines
)
1407 error ("Expression not found");
1410 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1413 perror_with_name (current_source_symtab
->filename
);
1416 stream
= fdopen (desc
, FDOPEN_MODE
);
1420 static char *buf
= NULL
;
1422 int cursize
, newsize
;
1425 buf
= xmalloc (cursize
);
1434 if (p
- buf
== cursize
)
1436 newsize
= cursize
+ cursize
/ 2;
1437 buf
= xrealloc (buf
, newsize
);
1442 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1444 #ifdef CRLF_SOURCE_FILES
1445 /* Remove the \r, if any, at the end of the line, otherwise
1446 regular expressions that end with $ or \n won't work. */
1447 if (p
- buf
> 1 && p
[-2] == '\r')
1454 /* we now have a source line in buf, null terminate and match */
1456 if (re_exec (buf
) > 0)
1460 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1461 set_internalvar (lookup_internalvar ("_"),
1462 value_from_longest (builtin_type_int
,
1464 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1470 printf_filtered ("Expression not found\n");
1476 reverse_search_command (char *regex
, int from_tty
)
1480 register FILE *stream
;
1484 line
= last_line_listed
- 1;
1486 msg
= (char *) re_comp (regex
);
1490 if (current_source_symtab
== 0)
1491 select_source_symtab (0);
1493 desc
= open_source_file (current_source_symtab
);
1495 perror_with_name (current_source_symtab
->filename
);
1497 if (current_source_symtab
->line_charpos
== 0)
1498 find_source_lines (current_source_symtab
, desc
);
1500 if (line
< 1 || line
> current_source_symtab
->nlines
)
1503 error ("Expression not found");
1506 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1509 perror_with_name (current_source_symtab
->filename
);
1512 stream
= fdopen (desc
, FDOPEN_MODE
);
1516 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1517 char buf
[4096]; /* Should be reasonable??? */
1518 register char *p
= buf
;
1527 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1529 #ifdef CRLF_SOURCE_FILES
1530 /* Remove the \r, if any, at the end of the line, otherwise
1531 regular expressions that end with $ or \n won't work. */
1532 if (p
- buf
> 1 && p
[-2] == '\r')
1539 /* We now have a source line in buf; null terminate and match. */
1541 if (re_exec (buf
) > 0)
1545 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1546 set_internalvar (lookup_internalvar ("_"),
1547 value_from_longest (builtin_type_int
,
1549 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1553 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1556 perror_with_name (current_source_symtab
->filename
);
1560 printf_filtered ("Expression not found\n");
1566 _initialize_source (void)
1568 struct cmd_list_element
*c
;
1569 current_source_symtab
= 0;
1570 init_source_path ();
1572 /* The intention is to use POSIX Basic Regular Expressions.
1573 Always use the GNU regex routine for consistency across all hosts.
1574 Our current GNU regex.c does not have all the POSIX features, so this is
1575 just an approximation. */
1576 re_set_syntax (RE_SYNTAX_GREP
);
1578 c
= add_cmd ("directory", class_files
, directory_command
,
1579 "Add directory DIR to beginning of search path for source files.\n\
1580 Forget cached info on source file locations and line positions.\n\
1581 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1582 directory in which the source file was compiled into object code.\n\
1583 With no argument, reset the search path to $cdir:$cwd, the default.",
1587 add_com_alias ("use", "directory", class_files
, 0);
1589 c
->completer
= filename_completer
;
1591 add_cmd ("directories", no_class
, show_directories
,
1592 "Current search path for finding source files.\n\
1593 $cwd in the path means the current working directory.\n\
1594 $cdir in the path means the compilation directory of the source file.",
1599 add_com_alias ("D", "directory", class_files
, 0);
1600 add_cmd ("ld", no_class
, show_directories
,
1601 "Current search path for finding source files.\n\
1602 $cwd in the path means the current working directory.\n\
1603 $cdir in the path means the compilation directory of the source file.",
1607 add_info ("source", source_info
,
1608 "Information about the current source file.");
1610 add_info ("line", line_info
,
1611 concat ("Core addresses of the code for a source line.\n\
1612 Line can be specified as\n\
1613 LINENUM, to list around that line in current file,\n\
1614 FILE:LINENUM, to list around that line in that file,\n\
1615 FUNCTION, to list around beginning of that function,\n\
1616 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1618 Default is to describe the last source line that was listed.\n\n\
1619 This sets the default address for \"x\" to the line's first instruction\n\
1620 so that \"x/i\" suffices to start examining the machine code.\n\
1621 The address is also stored as the value of \"$_\".", NULL
));
1623 add_com ("forward-search", class_files
, forward_search_command
,
1624 "Search for regular expression (see regex(3)) from last line listed.\n\
1625 The matching line number is also stored as the value of \"$_\".");
1626 add_com_alias ("search", "forward-search", class_files
, 0);
1628 add_com ("reverse-search", class_files
, reverse_search_command
,
1629 "Search backward for regular expression (see regex(3)) from last line listed.\n\
1630 The matching line number is also stored as the value of \"$_\".");
1634 add_com_alias ("/", "forward-search", class_files
, 0);
1635 add_com_alias ("?", "reverse-search", class_files
, 0);
1638 add_com ("list", class_files
, list_command
,
1639 concat ("List specified function or line.\n\
1640 With no argument, lists ten more lines after or around previous listing.\n\
1641 \"list -\" lists the ten lines before a previous ten-line listing.\n\
1642 One argument specifies a line, and ten lines are listed around that line.\n\
1643 Two arguments with comma between specify starting and ending lines to list.\n\
1645 Lines can be specified in these ways:\n\
1646 LINENUM, to list around that line in current file,\n\
1647 FILE:LINENUM, to list around that line in that file,\n\
1648 FUNCTION, to list around beginning of that function,\n\
1649 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1650 *ADDRESS, to list around the line containing that address.\n\
1651 With two args if one is empty it stands for ten lines away from the other arg.", NULL
));
1654 add_com_alias ("l", "list", class_files
, 1);
1656 add_com_alias ("v", "list", class_files
, 1);
1659 add_com_alias ("file", "list", class_files
, 1);
1662 (add_set_cmd ("listsize", class_support
, var_uinteger
,
1663 (char *) &lines_to_list
,
1664 "Set number of source lines gdb will list by default.",