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
);
612 /* If a file was opened, canonicalize its filename. Use xfullpath
613 rather than gdb_realpath to avoid resolving the basename part
614 of filenames when the associated file is a symbolic link. This
615 fixes a potential inconsistency between the filenames known to
616 GDB and the filenames it prints in the annotations. */
618 *filename_opened
= NULL
;
619 else if (IS_ABSOLUTE_PATH (filename
))
620 *filename_opened
= xfullpath (filename
);
623 /* Beware the // my son, the Emacs barfs, the botch that catch... */
625 char *f
= concat (current_directory
,
626 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
629 *filename_opened
= xfullpath (f
);
638 /* This is essentially a convenience, for clients that want the behaviour
639 of openp, using source_path, but that really don't want the file to be
640 opened but want instead just to know what the full pathname is (as
641 qualified against source_path).
643 The current working directory is searched first.
645 If the file was found, this function returns 1, and FULL_PATHNAME is
646 set to the fully-qualified pathname.
648 Else, this functions returns 0, and FULL_PATHNAME is set to NULL.
651 source_full_path_of (char *filename
, char **full_pathname
)
655 fd
= openp (source_path
, 1, filename
, O_RDONLY
, 0, full_pathname
);
658 *full_pathname
= NULL
;
667 /* Open a source file given a symtab S. Returns a file descriptor or
668 negative number for error. */
671 open_source_file (struct symtab
*s
)
673 char *path
= source_path
;
678 /* Quick way out if we already know its full name */
681 result
= open (s
->fullname
, OPEN_MODE
);
684 /* Didn't work -- free old one, try again. */
685 xmfree (s
->objfile
->md
, s
->fullname
);
689 if (s
->dirname
!= NULL
)
691 /* Replace a path entry of $cdir with the compilation directory name */
693 /* We cast strstr's result in case an ANSIhole has made it const,
694 which produces a "required warning" when assigned to a nonconst. */
695 p
= (char *) strstr (source_path
, "$cdir");
696 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
697 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
702 alloca (strlen (source_path
) + 1 + strlen (s
->dirname
) + 1);
703 len
= p
- source_path
;
704 strncpy (path
, source_path
, len
); /* Before $cdir */
705 strcpy (path
+ len
, s
->dirname
); /* new stuff */
706 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
710 result
= openp (path
, 0, s
->filename
, OPEN_MODE
, 0, &s
->fullname
);
713 /* Didn't work. Try using just the basename. */
714 p
= lbasename (s
->filename
);
715 if (p
!= s
->filename
)
716 result
= openp (path
, 0, p
, OPEN_MODE
, 0, &s
->fullname
);
721 fullname
= s
->fullname
;
722 s
->fullname
= mstrsave (s
->objfile
->md
, s
->fullname
);
728 /* Return the path to the source file associated with symtab. Returns NULL
732 symtab_to_filename (struct symtab
*s
)
739 /* If we've seen the file before, just return fullname. */
744 /* Try opening the file to setup fullname */
746 fd
= open_source_file (s
);
748 return s
->filename
; /* File not found. Just use short name */
750 /* Found the file. Cleanup and return the full name */
757 /* Create and initialize the table S->line_charpos that records
758 the positions of the lines in the source file, which is assumed
759 to be open on descriptor DESC.
760 All set S->nlines to the number of such lines. */
763 find_source_lines (struct symtab
*s
, int desc
)
766 register char *data
, *p
, *end
;
768 int lines_allocated
= 1000;
773 line_charpos
= (int *) xmmalloc (s
->objfile
->md
,
774 lines_allocated
* sizeof (int));
775 if (fstat (desc
, &st
) < 0)
776 perror_with_name (s
->filename
);
778 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
779 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
781 mtime
= bfd_get_mtime (exec_bfd
);
783 if (mtime
&& mtime
< st
.st_mtime
)
785 warning ("Source file is more recent than executable.\n");
788 #ifdef LSEEK_NOT_LINEAR
792 /* Have to read it byte by byte to find out where the chars live */
794 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
796 while (myread (desc
, &c
, 1) > 0)
800 if (nlines
== lines_allocated
)
802 lines_allocated
*= 2;
804 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
805 sizeof (int) * lines_allocated
);
807 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
811 #else /* lseek linear. */
813 struct cleanup
*old_cleanups
;
815 /* st_size might be a large type, but we only support source files whose
816 size fits in an int. */
817 size
= (int) st
.st_size
;
819 /* Use malloc, not alloca, because this may be pretty large, and we may
820 run into various kinds of limits on stack size. */
821 data
= (char *) xmalloc (size
);
822 old_cleanups
= make_cleanup (xfree
, data
);
824 /* Reassign `size' to result of read for systems where \r\n -> \n. */
825 size
= myread (desc
, data
, size
);
827 perror_with_name (s
->filename
);
835 /* A newline at the end does not start a new line. */
838 if (nlines
== lines_allocated
)
840 lines_allocated
*= 2;
842 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
843 sizeof (int) * lines_allocated
);
845 line_charpos
[nlines
++] = p
- data
;
848 do_cleanups (old_cleanups
);
850 #endif /* lseek linear. */
853 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
854 nlines
* sizeof (int));
858 /* Return the character position of a line LINE in symtab S.
859 Return 0 if anything is invalid. */
861 #if 0 /* Currently unused */
864 source_line_charpos (struct symtab
*s
, int line
)
868 if (!s
->line_charpos
|| line
<= 0)
870 if (line
> s
->nlines
)
872 return s
->line_charpos
[line
- 1];
875 /* Return the line number of character position POS in symtab S. */
878 source_charpos_line (register struct symtab
*s
, register int chr
)
880 register int line
= 0;
883 if (s
== 0 || s
->line_charpos
== 0)
885 lnp
= s
->line_charpos
;
886 /* Files are usually short, so sequential search is Ok */
887 while (line
< s
->nlines
&& *lnp
<= chr
)
892 if (line
>= s
->nlines
)
900 /* Get full pathname and line number positions for a symtab.
901 Return nonzero if line numbers may have changed.
902 Set *FULLNAME to actual name of the file as found by `openp',
903 or to 0 if the file is not found. */
906 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
908 register int desc
, linenums_changed
= 0;
910 desc
= open_source_file (s
);
918 *fullname
= s
->fullname
;
919 if (s
->line_charpos
== 0)
920 linenums_changed
= 1;
921 if (linenums_changed
)
922 find_source_lines (s
, desc
);
924 return linenums_changed
;
927 /* Print text describing the full name of the source file S
928 and the line number LINE and its corresponding character position.
929 The text starts with two Ctrl-z so that the Emacs-GDB interface
932 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
934 Return 1 if successful, 0 if could not find the file. */
937 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
940 if (s
->line_charpos
== 0)
941 get_filename_and_charpos (s
, (char **) NULL
);
942 if (s
->fullname
== 0)
944 if (line
> s
->nlines
)
945 /* Don't index off the end of the line_charpos array. */
947 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
950 current_source_line
= line
;
951 first_line_listed
= line
;
952 last_line_listed
= line
;
953 current_source_symtab
= s
;
958 /* Print source lines from the file of symtab S,
959 starting with line number LINE and stopping before line number STOPLINE. */
961 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
964 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
968 register FILE *stream
;
969 int nlines
= stopline
- line
;
971 /* Regardless of whether we can open the file, set current_source_symtab. */
972 current_source_symtab
= s
;
973 current_source_line
= line
;
974 first_line_listed
= line
;
976 /* If printing of source lines is disabled, just print file and line number */
977 if (ui_out_test_flags (uiout
, ui_source_list
))
979 /* Only prints "No such file or directory" once */
980 if ((s
!= last_source_visited
) || (!last_source_error
))
982 last_source_visited
= s
;
983 desc
= open_source_file (s
);
987 desc
= last_source_error
;
999 last_source_error
= desc
;
1003 char *name
= alloca (strlen (s
->filename
) + 100);
1004 sprintf (name
, "%d\t%s", line
, s
->filename
);
1005 print_sys_errmsg (name
, errno
);
1008 ui_out_field_int (uiout
, "line", line
);
1009 ui_out_text (uiout
, "\tin ");
1010 ui_out_field_string (uiout
, "file", s
->filename
);
1011 ui_out_text (uiout
, "\n");
1016 last_source_error
= 0;
1018 if (s
->line_charpos
== 0)
1019 find_source_lines (s
, desc
);
1021 if (line
< 1 || line
> s
->nlines
)
1024 error ("Line number %d out of range; %s has %d lines.",
1025 line
, s
->filename
, s
->nlines
);
1028 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1031 perror_with_name (s
->filename
);
1034 stream
= fdopen (desc
, FDOPEN_MODE
);
1037 while (nlines
-- > 0)
1044 last_line_listed
= current_source_line
;
1045 sprintf (buf
, "%d\t", current_source_line
++);
1046 ui_out_text (uiout
, buf
);
1049 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1051 sprintf (buf
, "^%c", c
+ 0100);
1052 ui_out_text (uiout
, buf
);
1055 ui_out_text (uiout
, "^?");
1056 #ifdef CRLF_SOURCE_FILES
1059 /* Skip a \r character, but only before a \n. */
1060 int c1
= fgetc (stream
);
1063 printf_filtered ("^%c", c
+ 0100);
1065 ungetc (c1
, stream
);
1070 sprintf (buf
, "%c", c
);
1071 ui_out_text (uiout
, buf
);
1074 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1080 /* Show source lines from the file of symtab S, starting with line
1081 number LINE and stopping before line number STOPLINE. If this is the
1082 not the command line version, then the source is shown in the source
1083 window otherwise it is simply printed */
1086 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1088 print_source_lines_base (s
, line
, stopline
, noerror
);
1093 /* Print a list of files and line numbers which a user may choose from
1094 in order to list a function which was specified ambiguously (as with
1095 `list classname::overloadedfuncname', for example). The vector in
1096 SALS provides the filenames and line numbers. */
1099 ambiguous_line_spec (struct symtabs_and_lines
*sals
)
1103 for (i
= 0; i
< sals
->nelts
; ++i
)
1104 printf_filtered ("file: \"%s\", line number: %d\n",
1105 sals
->sals
[i
].symtab
->filename
, sals
->sals
[i
].line
);
1109 list_command (char *arg
, int from_tty
)
1111 struct symtabs_and_lines sals
, sals_end
;
1112 struct symtab_and_line sal
, sal_end
;
1118 int linenum_beg
= 0;
1121 if (!have_full_symbols () && !have_partial_symbols ())
1122 error ("No symbol table is loaded. Use the \"file\" command.");
1124 /* Pull in a current source symtab if necessary */
1125 if (current_source_symtab
== 0 &&
1126 (arg
== 0 || arg
[0] == '+' || arg
[0] == '-'))
1127 select_source_symtab (0);
1129 /* "l" or "l +" lists next ten lines. */
1131 if (arg
== 0 || STREQ (arg
, "+"))
1133 if (current_source_symtab
== 0)
1134 error ("No default source file yet. Do \"help list\".");
1135 print_source_lines (current_source_symtab
, current_source_line
,
1136 current_source_line
+ lines_to_list
, 0);
1140 /* "l -" lists previous ten lines, the ones before the ten just listed. */
1141 if (STREQ (arg
, "-"))
1143 if (current_source_symtab
== 0)
1144 error ("No default source file yet. Do \"help list\".");
1145 print_source_lines (current_source_symtab
,
1146 max (first_line_listed
- lines_to_list
, 1),
1147 first_line_listed
, 0);
1151 /* Now if there is only one argument, decode it in SAL
1153 If there are two arguments, decode them in SAL and SAL_END
1154 and clear NO_END; however, if one of the arguments is blank,
1155 set DUMMY_BEG or DUMMY_END to record that fact. */
1162 sals
= decode_line_1 (&arg1
, 0, 0, 0, 0);
1168 ambiguous_line_spec (&sals
);
1177 /* Record whether the BEG arg is all digits. */
1179 for (p
= arg
; p
!= arg1
&& *p
>= '0' && *p
<= '9'; p
++);
1180 linenum_beg
= (p
== arg1
);
1182 while (*arg1
== ' ' || *arg1
== '\t')
1188 while (*arg1
== ' ' || *arg1
== '\t')
1195 sals_end
= decode_line_1 (&arg1
, 0, 0, 0, 0);
1197 sals_end
= decode_line_1 (&arg1
, 0, sal
.symtab
, sal
.line
, 0);
1198 if (sals_end
.nelts
== 0)
1200 if (sals_end
.nelts
> 1)
1202 ambiguous_line_spec (&sals_end
);
1203 xfree (sals_end
.sals
);
1206 sal_end
= sals_end
.sals
[0];
1207 xfree (sals_end
.sals
);
1212 error ("Junk at end of line specification.");
1214 if (!no_end
&& !dummy_beg
&& !dummy_end
1215 && sal
.symtab
!= sal_end
.symtab
)
1216 error ("Specified start and end are in different files.");
1217 if (dummy_beg
&& dummy_end
)
1218 error ("Two empty args do not say what lines to list.");
1220 /* if line was specified by address,
1221 first print exactly which line, and which file.
1222 In this case, sal.symtab == 0 means address is outside
1223 of all known source files, not that user failed to give a filename. */
1226 if (sal
.symtab
== 0)
1227 /* FIXME-32x64--assumes sal.pc fits in long. */
1228 error ("No source file for address %s.",
1229 local_hex_string ((unsigned long) sal
.pc
));
1230 sym
= find_pc_function (sal
.pc
);
1233 print_address_numeric (sal
.pc
, 1, gdb_stdout
);
1234 printf_filtered (" is in ");
1235 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), gdb_stdout
);
1236 printf_filtered (" (%s:%d).\n", sal
.symtab
->filename
, sal
.line
);
1240 print_address_numeric (sal
.pc
, 1, gdb_stdout
);
1241 printf_filtered (" is at %s:%d.\n",
1242 sal
.symtab
->filename
, sal
.line
);
1246 /* If line was not specified by just a line number,
1247 and it does not imply a symtab, it must be an undebuggable symbol
1248 which means no source code. */
1250 if (!linenum_beg
&& sal
.symtab
== 0)
1251 error ("No line number known for %s.", arg
);
1253 /* If this command is repeated with RET,
1254 turn it into the no-arg variant. */
1259 if (dummy_beg
&& sal_end
.symtab
== 0)
1260 error ("No default source file yet. Do \"help list\".");
1262 print_source_lines (sal_end
.symtab
,
1263 max (sal_end
.line
- (lines_to_list
- 1), 1),
1264 sal_end
.line
+ 1, 0);
1265 else if (sal
.symtab
== 0)
1266 error ("No default source file yet. Do \"help list\".");
1269 int first_line
= sal
.line
- lines_to_list
/ 2;
1271 if (first_line
< 1) first_line
= 1;
1273 print_source_lines (sal
.symtab
, first_line
, first_line
+ lines_to_list
,
1277 print_source_lines (sal
.symtab
, sal
.line
,
1279 ? sal
.line
+ lines_to_list
1280 : sal_end
.line
+ 1),
1284 /* Print info on range of pc's in a specified line. */
1287 line_info (char *arg
, int from_tty
)
1289 struct symtabs_and_lines sals
;
1290 struct symtab_and_line sal
;
1291 CORE_ADDR start_pc
, end_pc
;
1294 INIT_SAL (&sal
); /* initialize to zeroes */
1298 sal
.symtab
= current_source_symtab
;
1299 sal
.line
= last_line_listed
;
1301 sals
.sals
= (struct symtab_and_line
*)
1302 xmalloc (sizeof (struct symtab_and_line
));
1307 sals
= decode_line_spec_1 (arg
, 0);
1312 /* C++ More than one line may have been specified, as when the user
1313 specifies an overloaded function name. Print info on them all. */
1314 for (i
= 0; i
< sals
.nelts
; i
++)
1318 if (sal
.symtab
== 0)
1320 printf_filtered ("No line number information available");
1323 /* This is useful for "info line *0x7f34". If we can't tell the
1324 user about a source line, at least let them have the symbolic
1326 printf_filtered (" for address ");
1328 print_address (sal
.pc
, gdb_stdout
);
1331 printf_filtered (".");
1332 printf_filtered ("\n");
1334 else if (sal
.line
> 0
1335 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1337 if (start_pc
== end_pc
)
1339 printf_filtered ("Line %d of \"%s\"",
1340 sal
.line
, sal
.symtab
->filename
);
1342 printf_filtered (" is at address ");
1343 print_address (start_pc
, gdb_stdout
);
1345 printf_filtered (" but contains no code.\n");
1349 printf_filtered ("Line %d of \"%s\"",
1350 sal
.line
, sal
.symtab
->filename
);
1352 printf_filtered (" starts at address ");
1353 print_address (start_pc
, gdb_stdout
);
1355 printf_filtered (" and ends at ");
1356 print_address (end_pc
, gdb_stdout
);
1357 printf_filtered (".\n");
1360 /* x/i should display this line's code. */
1361 set_next_address (start_pc
);
1363 /* Repeating "info line" should do the following line. */
1364 last_line_listed
= sal
.line
+ 1;
1366 /* If this is the only line, show the source code. If it could
1367 not find the file, don't do anything special. */
1368 if (annotation_level
&& sals
.nelts
== 1)
1369 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1372 /* Is there any case in which we get here, and have an address
1373 which the user would want to see? If we have debugging symbols
1374 and no line numbers? */
1375 printf_filtered ("Line number %d is out of range for \"%s\".\n",
1376 sal
.line
, sal
.symtab
->filename
);
1381 /* Commands to search the source file for a regexp. */
1385 forward_search_command (char *regex
, int from_tty
)
1389 register FILE *stream
;
1393 line
= last_line_listed
+ 1;
1395 msg
= (char *) re_comp (regex
);
1399 if (current_source_symtab
== 0)
1400 select_source_symtab (0);
1402 desc
= open_source_file (current_source_symtab
);
1404 perror_with_name (current_source_symtab
->filename
);
1406 if (current_source_symtab
->line_charpos
== 0)
1407 find_source_lines (current_source_symtab
, desc
);
1409 if (line
< 1 || line
> current_source_symtab
->nlines
)
1412 error ("Expression not found");
1415 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1418 perror_with_name (current_source_symtab
->filename
);
1421 stream
= fdopen (desc
, FDOPEN_MODE
);
1425 static char *buf
= NULL
;
1427 int cursize
, newsize
;
1430 buf
= xmalloc (cursize
);
1439 if (p
- buf
== cursize
)
1441 newsize
= cursize
+ cursize
/ 2;
1442 buf
= xrealloc (buf
, newsize
);
1447 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1449 #ifdef CRLF_SOURCE_FILES
1450 /* Remove the \r, if any, at the end of the line, otherwise
1451 regular expressions that end with $ or \n won't work. */
1452 if (p
- buf
> 1 && p
[-2] == '\r')
1459 /* we now have a source line in buf, null terminate and match */
1461 if (re_exec (buf
) > 0)
1465 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1466 set_internalvar (lookup_internalvar ("_"),
1467 value_from_longest (builtin_type_int
,
1469 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1475 printf_filtered ("Expression not found\n");
1481 reverse_search_command (char *regex
, int from_tty
)
1485 register FILE *stream
;
1489 line
= last_line_listed
- 1;
1491 msg
= (char *) re_comp (regex
);
1495 if (current_source_symtab
== 0)
1496 select_source_symtab (0);
1498 desc
= open_source_file (current_source_symtab
);
1500 perror_with_name (current_source_symtab
->filename
);
1502 if (current_source_symtab
->line_charpos
== 0)
1503 find_source_lines (current_source_symtab
, desc
);
1505 if (line
< 1 || line
> current_source_symtab
->nlines
)
1508 error ("Expression not found");
1511 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1514 perror_with_name (current_source_symtab
->filename
);
1517 stream
= fdopen (desc
, FDOPEN_MODE
);
1521 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1522 char buf
[4096]; /* Should be reasonable??? */
1523 register char *p
= buf
;
1532 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1534 #ifdef CRLF_SOURCE_FILES
1535 /* Remove the \r, if any, at the end of the line, otherwise
1536 regular expressions that end with $ or \n won't work. */
1537 if (p
- buf
> 1 && p
[-2] == '\r')
1544 /* We now have a source line in buf; null terminate and match. */
1546 if (re_exec (buf
) > 0)
1550 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1551 set_internalvar (lookup_internalvar ("_"),
1552 value_from_longest (builtin_type_int
,
1554 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1558 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1561 perror_with_name (current_source_symtab
->filename
);
1565 printf_filtered ("Expression not found\n");
1571 _initialize_source (void)
1573 struct cmd_list_element
*c
;
1574 current_source_symtab
= 0;
1575 init_source_path ();
1577 /* The intention is to use POSIX Basic Regular Expressions.
1578 Always use the GNU regex routine for consistency across all hosts.
1579 Our current GNU regex.c does not have all the POSIX features, so this is
1580 just an approximation. */
1581 re_set_syntax (RE_SYNTAX_GREP
);
1583 c
= add_cmd ("directory", class_files
, directory_command
,
1584 "Add directory DIR to beginning of search path for source files.\n\
1585 Forget cached info on source file locations and line positions.\n\
1586 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1587 directory in which the source file was compiled into object code.\n\
1588 With no argument, reset the search path to $cdir:$cwd, the default.",
1592 add_com_alias ("use", "directory", class_files
, 0);
1594 set_cmd_completer (c
, filename_completer
);
1596 add_cmd ("directories", no_class
, show_directories
,
1597 "Current search path for finding source files.\n\
1598 $cwd in the path means the current working directory.\n\
1599 $cdir in the path means the compilation directory of the source file.",
1604 add_com_alias ("D", "directory", class_files
, 0);
1605 add_cmd ("ld", no_class
, show_directories
,
1606 "Current search path for finding source files.\n\
1607 $cwd in the path means the current working directory.\n\
1608 $cdir in the path means the compilation directory of the source file.",
1612 add_info ("source", source_info
,
1613 "Information about the current source file.");
1615 add_info ("line", line_info
,
1616 concat ("Core addresses of the code for a source line.\n\
1617 Line can be specified as\n\
1618 LINENUM, to list around that line in current file,\n\
1619 FILE:LINENUM, to list around that line in that file,\n\
1620 FUNCTION, to list around beginning of that function,\n\
1621 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1623 Default is to describe the last source line that was listed.\n\n\
1624 This sets the default address for \"x\" to the line's first instruction\n\
1625 so that \"x/i\" suffices to start examining the machine code.\n\
1626 The address is also stored as the value of \"$_\".", NULL
));
1628 add_com ("forward-search", class_files
, forward_search_command
,
1629 "Search for regular expression (see regex(3)) from last line listed.\n\
1630 The matching line number is also stored as the value of \"$_\".");
1631 add_com_alias ("search", "forward-search", class_files
, 0);
1633 add_com ("reverse-search", class_files
, reverse_search_command
,
1634 "Search backward for regular expression (see regex(3)) from last line listed.\n\
1635 The matching line number is also stored as the value of \"$_\".");
1639 add_com_alias ("/", "forward-search", class_files
, 0);
1640 add_com_alias ("?", "reverse-search", class_files
, 0);
1643 add_com ("list", class_files
, list_command
,
1644 concat ("List specified function or line.\n\
1645 With no argument, lists ten more lines after or around previous listing.\n\
1646 \"list -\" lists the ten lines before a previous ten-line listing.\n\
1647 One argument specifies a line, and ten lines are listed around that line.\n\
1648 Two arguments with comma between specify starting and ending lines to list.\n\
1650 Lines can be specified in these ways:\n\
1651 LINENUM, to list around that line in current file,\n\
1652 FILE:LINENUM, to list around that line in that file,\n\
1653 FUNCTION, to list around beginning of that function,\n\
1654 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1655 *ADDRESS, to list around the line containing that address.\n\
1656 With two args if one is empty it stands for ten lines away from the other arg.", NULL
));
1659 add_com_alias ("l", "list", class_files
, 1);
1661 add_com_alias ("v", "list", class_files
, 1);
1664 add_com_alias ("file", "list", class_files
, 1);
1667 (add_set_cmd ("listsize", class_support
, var_uinteger
,
1668 (char *) &lines_to_list
,
1669 "Set number of source lines gdb will list by default.",
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