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
);
503 printf_filtered ("%s preprocessor macro info.\n",
504 s
->macro_table
? "Includes" : "Does not include");
508 /* Return True if the file NAME exists and is a regular file */
510 is_regular_file (const char *name
)
513 const int status
= stat (name
, &st
);
515 /* Stat should never fail except when the file does not exist.
516 If stat fails, analyze the source of error and return True
517 unless the file does not exist, to avoid returning false results
518 on obscure systems where stat does not work as expected.
521 return (errno
!= ENOENT
);
523 return S_ISREG (st
.st_mode
);
526 /* Open a file named STRING, searching path PATH (dir names sep by some char)
527 using mode MODE and protection bits PROT in the calls to open.
529 If TRY_CWD_FIRST, try to open ./STRING before searching PATH.
530 (ie pretend the first element of PATH is "."). This also indicates
531 that a slash in STRING disables searching of the path (this is
532 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
533 get that particular version of foo or an error message).
535 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
536 the actual file opened (this string will always start with a "/"). We
537 have to take special pains to avoid doubling the "/" between the directory
538 and the file, sigh! Emacs gets confuzzed by this when we print the
541 If a file is found, return the descriptor.
542 Otherwise, return -1, with errno set for the last name we tried to open. */
544 /* >>>> This should only allow files of certain types,
545 >>>> eg executable, non-directory */
547 openp (const char *path
, int try_cwd_first
, const char *string
,
549 char **filename_opened
)
552 register char *filename
;
561 #if defined(_WIN32) || defined(__CYGWIN__)
565 if ((try_cwd_first
|| IS_ABSOLUTE_PATH (string
)) && is_regular_file (string
))
568 filename
= alloca (strlen (string
) + 1);
569 strcpy (filename
, string
);
570 fd
= open (filename
, mode
, prot
);
573 for (i
= 0; string
[i
]; i
++)
574 if (IS_DIR_SEPARATOR (string
[i
]))
579 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
582 alloclen
= strlen (path
) + strlen (string
) + 2;
583 filename
= alloca (alloclen
);
585 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
587 p1
= strchr (p
, DIRNAME_SEPARATOR
);
593 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
594 && p
[2] == 'w' && p
[3] == 'd')
596 /* Name is $cwd -- insert current directory name instead. */
599 /* First, realloc the filename buffer if too short. */
600 len
= strlen (current_directory
);
601 newlen
= len
+ strlen (string
) + 2;
602 if (newlen
> alloclen
)
605 filename
= alloca (alloclen
);
607 strcpy (filename
, current_directory
);
611 /* Normal file name in path -- just use it. */
612 strncpy (filename
, p
, len
);
616 /* Remove trailing slashes */
617 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
620 strcat (filename
+ len
, SLASH_STRING
);
621 strcat (filename
, string
);
623 if (is_regular_file (filename
))
625 fd
= open (filename
, mode
);
634 /* If a file was opened, canonicalize its filename. Use xfullpath
635 rather than gdb_realpath to avoid resolving the basename part
636 of filenames when the associated file is a symbolic link. This
637 fixes a potential inconsistency between the filenames known to
638 GDB and the filenames it prints in the annotations. */
640 *filename_opened
= NULL
;
641 else if (IS_ABSOLUTE_PATH (filename
))
642 *filename_opened
= xfullpath (filename
);
645 /* Beware the // my son, the Emacs barfs, the botch that catch... */
647 char *f
= concat (current_directory
,
648 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
651 *filename_opened
= xfullpath (f
);
660 /* This is essentially a convenience, for clients that want the behaviour
661 of openp, using source_path, but that really don't want the file to be
662 opened but want instead just to know what the full pathname is (as
663 qualified against source_path).
665 The current working directory is searched first.
667 If the file was found, this function returns 1, and FULL_PATHNAME is
668 set to the fully-qualified pathname.
670 Else, this functions returns 0, and FULL_PATHNAME is set to NULL.
673 source_full_path_of (char *filename
, char **full_pathname
)
677 fd
= openp (source_path
, 1, filename
, O_RDONLY
, 0, full_pathname
);
680 *full_pathname
= NULL
;
689 /* Open a source file given a symtab S. Returns a file descriptor or
690 negative number for error. */
693 open_source_file (struct symtab
*s
)
695 char *path
= source_path
;
700 /* Quick way out if we already know its full name */
703 result
= open (s
->fullname
, OPEN_MODE
);
706 /* Didn't work -- free old one, try again. */
707 xmfree (s
->objfile
->md
, s
->fullname
);
711 if (s
->dirname
!= NULL
)
713 /* Replace a path entry of $cdir with the compilation directory name */
715 /* We cast strstr's result in case an ANSIhole has made it const,
716 which produces a "required warning" when assigned to a nonconst. */
717 p
= (char *) strstr (source_path
, "$cdir");
718 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
719 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
724 alloca (strlen (source_path
) + 1 + strlen (s
->dirname
) + 1);
725 len
= p
- source_path
;
726 strncpy (path
, source_path
, len
); /* Before $cdir */
727 strcpy (path
+ len
, s
->dirname
); /* new stuff */
728 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
732 result
= openp (path
, 0, s
->filename
, OPEN_MODE
, 0, &s
->fullname
);
735 /* Didn't work. Try using just the basename. */
736 p
= lbasename (s
->filename
);
737 if (p
!= s
->filename
)
738 result
= openp (path
, 0, p
, OPEN_MODE
, 0, &s
->fullname
);
743 fullname
= s
->fullname
;
744 s
->fullname
= mstrsave (s
->objfile
->md
, s
->fullname
);
750 /* Return the path to the source file associated with symtab. Returns NULL
754 symtab_to_filename (struct symtab
*s
)
761 /* If we've seen the file before, just return fullname. */
766 /* Try opening the file to setup fullname */
768 fd
= open_source_file (s
);
770 return s
->filename
; /* File not found. Just use short name */
772 /* Found the file. Cleanup and return the full name */
779 /* Create and initialize the table S->line_charpos that records
780 the positions of the lines in the source file, which is assumed
781 to be open on descriptor DESC.
782 All set S->nlines to the number of such lines. */
785 find_source_lines (struct symtab
*s
, int desc
)
788 register char *data
, *p
, *end
;
790 int lines_allocated
= 1000;
795 line_charpos
= (int *) xmmalloc (s
->objfile
->md
,
796 lines_allocated
* sizeof (int));
797 if (fstat (desc
, &st
) < 0)
798 perror_with_name (s
->filename
);
800 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
801 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
803 mtime
= bfd_get_mtime (exec_bfd
);
805 if (mtime
&& mtime
< st
.st_mtime
)
807 warning ("Source file is more recent than executable.\n");
810 #ifdef LSEEK_NOT_LINEAR
814 /* Have to read it byte by byte to find out where the chars live */
816 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
818 while (myread (desc
, &c
, 1) > 0)
822 if (nlines
== lines_allocated
)
824 lines_allocated
*= 2;
826 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
827 sizeof (int) * lines_allocated
);
829 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
833 #else /* lseek linear. */
835 struct cleanup
*old_cleanups
;
837 /* st_size might be a large type, but we only support source files whose
838 size fits in an int. */
839 size
= (int) st
.st_size
;
841 /* Use malloc, not alloca, because this may be pretty large, and we may
842 run into various kinds of limits on stack size. */
843 data
= (char *) xmalloc (size
);
844 old_cleanups
= make_cleanup (xfree
, data
);
846 /* Reassign `size' to result of read for systems where \r\n -> \n. */
847 size
= myread (desc
, data
, size
);
849 perror_with_name (s
->filename
);
857 /* A newline at the end does not start a new line. */
860 if (nlines
== lines_allocated
)
862 lines_allocated
*= 2;
864 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
865 sizeof (int) * lines_allocated
);
867 line_charpos
[nlines
++] = p
- data
;
870 do_cleanups (old_cleanups
);
872 #endif /* lseek linear. */
875 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
876 nlines
* sizeof (int));
880 /* Return the character position of a line LINE in symtab S.
881 Return 0 if anything is invalid. */
883 #if 0 /* Currently unused */
886 source_line_charpos (struct symtab
*s
, int line
)
890 if (!s
->line_charpos
|| line
<= 0)
892 if (line
> s
->nlines
)
894 return s
->line_charpos
[line
- 1];
897 /* Return the line number of character position POS in symtab S. */
900 source_charpos_line (register struct symtab
*s
, register int chr
)
902 register int line
= 0;
905 if (s
== 0 || s
->line_charpos
== 0)
907 lnp
= s
->line_charpos
;
908 /* Files are usually short, so sequential search is Ok */
909 while (line
< s
->nlines
&& *lnp
<= chr
)
914 if (line
>= s
->nlines
)
922 /* Get full pathname and line number positions for a symtab.
923 Return nonzero if line numbers may have changed.
924 Set *FULLNAME to actual name of the file as found by `openp',
925 or to 0 if the file is not found. */
928 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
930 register int desc
, linenums_changed
= 0;
932 desc
= open_source_file (s
);
940 *fullname
= s
->fullname
;
941 if (s
->line_charpos
== 0)
942 linenums_changed
= 1;
943 if (linenums_changed
)
944 find_source_lines (s
, desc
);
946 return linenums_changed
;
949 /* Print text describing the full name of the source file S
950 and the line number LINE and its corresponding character position.
951 The text starts with two Ctrl-z so that the Emacs-GDB interface
954 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
956 Return 1 if successful, 0 if could not find the file. */
959 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
962 if (s
->line_charpos
== 0)
963 get_filename_and_charpos (s
, (char **) NULL
);
964 if (s
->fullname
== 0)
966 if (line
> s
->nlines
)
967 /* Don't index off the end of the line_charpos array. */
969 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
972 current_source_line
= line
;
973 first_line_listed
= line
;
974 last_line_listed
= line
;
975 current_source_symtab
= s
;
980 /* Print source lines from the file of symtab S,
981 starting with line number LINE and stopping before line number STOPLINE. */
983 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
986 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
990 register FILE *stream
;
991 int nlines
= stopline
- line
;
993 /* Regardless of whether we can open the file, set current_source_symtab. */
994 current_source_symtab
= s
;
995 current_source_line
= line
;
996 first_line_listed
= line
;
998 /* If printing of source lines is disabled, just print file and line number */
999 if (ui_out_test_flags (uiout
, ui_source_list
))
1001 /* Only prints "No such file or directory" once */
1002 if ((s
!= last_source_visited
) || (!last_source_error
))
1004 last_source_visited
= s
;
1005 desc
= open_source_file (s
);
1009 desc
= last_source_error
;
1021 last_source_error
= desc
;
1025 char *name
= alloca (strlen (s
->filename
) + 100);
1026 sprintf (name
, "%d\t%s", line
, s
->filename
);
1027 print_sys_errmsg (name
, errno
);
1030 ui_out_field_int (uiout
, "line", line
);
1031 ui_out_text (uiout
, "\tin ");
1032 ui_out_field_string (uiout
, "file", s
->filename
);
1033 ui_out_text (uiout
, "\n");
1038 last_source_error
= 0;
1040 if (s
->line_charpos
== 0)
1041 find_source_lines (s
, desc
);
1043 if (line
< 1 || line
> s
->nlines
)
1046 error ("Line number %d out of range; %s has %d lines.",
1047 line
, s
->filename
, s
->nlines
);
1050 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1053 perror_with_name (s
->filename
);
1056 stream
= fdopen (desc
, FDOPEN_MODE
);
1059 while (nlines
-- > 0)
1066 last_line_listed
= current_source_line
;
1067 sprintf (buf
, "%d\t", current_source_line
++);
1068 ui_out_text (uiout
, buf
);
1071 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1073 sprintf (buf
, "^%c", c
+ 0100);
1074 ui_out_text (uiout
, buf
);
1077 ui_out_text (uiout
, "^?");
1078 #ifdef CRLF_SOURCE_FILES
1081 /* Skip a \r character, but only before a \n. */
1082 int c1
= fgetc (stream
);
1085 printf_filtered ("^%c", c
+ 0100);
1087 ungetc (c1
, stream
);
1092 sprintf (buf
, "%c", c
);
1093 ui_out_text (uiout
, buf
);
1096 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1102 /* Show source lines from the file of symtab S, starting with line
1103 number LINE and stopping before line number STOPLINE. If this is the
1104 not the command line version, then the source is shown in the source
1105 window otherwise it is simply printed */
1108 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1110 print_source_lines_base (s
, line
, stopline
, noerror
);
1115 /* Print a list of files and line numbers which a user may choose from
1116 in order to list a function which was specified ambiguously (as with
1117 `list classname::overloadedfuncname', for example). The vector in
1118 SALS provides the filenames and line numbers. */
1121 ambiguous_line_spec (struct symtabs_and_lines
*sals
)
1125 for (i
= 0; i
< sals
->nelts
; ++i
)
1126 printf_filtered ("file: \"%s\", line number: %d\n",
1127 sals
->sals
[i
].symtab
->filename
, sals
->sals
[i
].line
);
1131 list_command (char *arg
, int from_tty
)
1133 struct symtabs_and_lines sals
, sals_end
;
1134 struct symtab_and_line sal
, sal_end
;
1140 int linenum_beg
= 0;
1143 if (!have_full_symbols () && !have_partial_symbols ())
1144 error ("No symbol table is loaded. Use the \"file\" command.");
1146 /* Pull in a current source symtab if necessary */
1147 if (current_source_symtab
== 0 &&
1148 (arg
== 0 || arg
[0] == '+' || arg
[0] == '-'))
1149 select_source_symtab (0);
1151 /* "l" or "l +" lists next ten lines. */
1153 if (arg
== 0 || STREQ (arg
, "+"))
1155 if (current_source_symtab
== 0)
1156 error ("No default source file yet. Do \"help list\".");
1157 print_source_lines (current_source_symtab
, current_source_line
,
1158 current_source_line
+ lines_to_list
, 0);
1162 /* "l -" lists previous ten lines, the ones before the ten just listed. */
1163 if (STREQ (arg
, "-"))
1165 if (current_source_symtab
== 0)
1166 error ("No default source file yet. Do \"help list\".");
1167 print_source_lines (current_source_symtab
,
1168 max (first_line_listed
- lines_to_list
, 1),
1169 first_line_listed
, 0);
1173 /* Now if there is only one argument, decode it in SAL
1175 If there are two arguments, decode them in SAL and SAL_END
1176 and clear NO_END; however, if one of the arguments is blank,
1177 set DUMMY_BEG or DUMMY_END to record that fact. */
1184 sals
= decode_line_1 (&arg1
, 0, 0, 0, 0);
1190 ambiguous_line_spec (&sals
);
1199 /* Record whether the BEG arg is all digits. */
1201 for (p
= arg
; p
!= arg1
&& *p
>= '0' && *p
<= '9'; p
++);
1202 linenum_beg
= (p
== arg1
);
1204 while (*arg1
== ' ' || *arg1
== '\t')
1210 while (*arg1
== ' ' || *arg1
== '\t')
1217 sals_end
= decode_line_1 (&arg1
, 0, 0, 0, 0);
1219 sals_end
= decode_line_1 (&arg1
, 0, sal
.symtab
, sal
.line
, 0);
1220 if (sals_end
.nelts
== 0)
1222 if (sals_end
.nelts
> 1)
1224 ambiguous_line_spec (&sals_end
);
1225 xfree (sals_end
.sals
);
1228 sal_end
= sals_end
.sals
[0];
1229 xfree (sals_end
.sals
);
1234 error ("Junk at end of line specification.");
1236 if (!no_end
&& !dummy_beg
&& !dummy_end
1237 && sal
.symtab
!= sal_end
.symtab
)
1238 error ("Specified start and end are in different files.");
1239 if (dummy_beg
&& dummy_end
)
1240 error ("Two empty args do not say what lines to list.");
1242 /* if line was specified by address,
1243 first print exactly which line, and which file.
1244 In this case, sal.symtab == 0 means address is outside
1245 of all known source files, not that user failed to give a filename. */
1248 if (sal
.symtab
== 0)
1249 /* FIXME-32x64--assumes sal.pc fits in long. */
1250 error ("No source file for address %s.",
1251 local_hex_string ((unsigned long) sal
.pc
));
1252 sym
= find_pc_function (sal
.pc
);
1255 print_address_numeric (sal
.pc
, 1, gdb_stdout
);
1256 printf_filtered (" is in ");
1257 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), gdb_stdout
);
1258 printf_filtered (" (%s:%d).\n", sal
.symtab
->filename
, sal
.line
);
1262 print_address_numeric (sal
.pc
, 1, gdb_stdout
);
1263 printf_filtered (" is at %s:%d.\n",
1264 sal
.symtab
->filename
, sal
.line
);
1268 /* If line was not specified by just a line number,
1269 and it does not imply a symtab, it must be an undebuggable symbol
1270 which means no source code. */
1272 if (!linenum_beg
&& sal
.symtab
== 0)
1273 error ("No line number known for %s.", arg
);
1275 /* If this command is repeated with RET,
1276 turn it into the no-arg variant. */
1281 if (dummy_beg
&& sal_end
.symtab
== 0)
1282 error ("No default source file yet. Do \"help list\".");
1284 print_source_lines (sal_end
.symtab
,
1285 max (sal_end
.line
- (lines_to_list
- 1), 1),
1286 sal_end
.line
+ 1, 0);
1287 else if (sal
.symtab
== 0)
1288 error ("No default source file yet. Do \"help list\".");
1291 int first_line
= sal
.line
- lines_to_list
/ 2;
1293 if (first_line
< 1) first_line
= 1;
1295 print_source_lines (sal
.symtab
, first_line
, first_line
+ lines_to_list
,
1299 print_source_lines (sal
.symtab
, sal
.line
,
1301 ? sal
.line
+ lines_to_list
1302 : sal_end
.line
+ 1),
1306 /* Print info on range of pc's in a specified line. */
1309 line_info (char *arg
, int from_tty
)
1311 struct symtabs_and_lines sals
;
1312 struct symtab_and_line sal
;
1313 CORE_ADDR start_pc
, end_pc
;
1316 INIT_SAL (&sal
); /* initialize to zeroes */
1320 sal
.symtab
= current_source_symtab
;
1321 sal
.line
= last_line_listed
;
1323 sals
.sals
= (struct symtab_and_line
*)
1324 xmalloc (sizeof (struct symtab_and_line
));
1329 sals
= decode_line_spec_1 (arg
, 0);
1334 /* C++ More than one line may have been specified, as when the user
1335 specifies an overloaded function name. Print info on them all. */
1336 for (i
= 0; i
< sals
.nelts
; i
++)
1340 if (sal
.symtab
== 0)
1342 printf_filtered ("No line number information available");
1345 /* This is useful for "info line *0x7f34". If we can't tell the
1346 user about a source line, at least let them have the symbolic
1348 printf_filtered (" for address ");
1350 print_address (sal
.pc
, gdb_stdout
);
1353 printf_filtered (".");
1354 printf_filtered ("\n");
1356 else if (sal
.line
> 0
1357 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1359 if (start_pc
== end_pc
)
1361 printf_filtered ("Line %d of \"%s\"",
1362 sal
.line
, sal
.symtab
->filename
);
1364 printf_filtered (" is at address ");
1365 print_address (start_pc
, gdb_stdout
);
1367 printf_filtered (" but contains no code.\n");
1371 printf_filtered ("Line %d of \"%s\"",
1372 sal
.line
, sal
.symtab
->filename
);
1374 printf_filtered (" starts at address ");
1375 print_address (start_pc
, gdb_stdout
);
1377 printf_filtered (" and ends at ");
1378 print_address (end_pc
, gdb_stdout
);
1379 printf_filtered (".\n");
1382 /* x/i should display this line's code. */
1383 set_next_address (start_pc
);
1385 /* Repeating "info line" should do the following line. */
1386 last_line_listed
= sal
.line
+ 1;
1388 /* If this is the only line, show the source code. If it could
1389 not find the file, don't do anything special. */
1390 if (annotation_level
&& sals
.nelts
== 1)
1391 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1394 /* Is there any case in which we get here, and have an address
1395 which the user would want to see? If we have debugging symbols
1396 and no line numbers? */
1397 printf_filtered ("Line number %d is out of range for \"%s\".\n",
1398 sal
.line
, sal
.symtab
->filename
);
1403 /* Commands to search the source file for a regexp. */
1407 forward_search_command (char *regex
, int from_tty
)
1411 register FILE *stream
;
1415 line
= last_line_listed
+ 1;
1417 msg
= (char *) re_comp (regex
);
1421 if (current_source_symtab
== 0)
1422 select_source_symtab (0);
1424 desc
= open_source_file (current_source_symtab
);
1426 perror_with_name (current_source_symtab
->filename
);
1428 if (current_source_symtab
->line_charpos
== 0)
1429 find_source_lines (current_source_symtab
, desc
);
1431 if (line
< 1 || line
> current_source_symtab
->nlines
)
1434 error ("Expression not found");
1437 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1440 perror_with_name (current_source_symtab
->filename
);
1443 stream
= fdopen (desc
, FDOPEN_MODE
);
1447 static char *buf
= NULL
;
1449 int cursize
, newsize
;
1452 buf
= xmalloc (cursize
);
1461 if (p
- buf
== cursize
)
1463 newsize
= cursize
+ cursize
/ 2;
1464 buf
= xrealloc (buf
, newsize
);
1469 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1471 #ifdef CRLF_SOURCE_FILES
1472 /* Remove the \r, if any, at the end of the line, otherwise
1473 regular expressions that end with $ or \n won't work. */
1474 if (p
- buf
> 1 && p
[-2] == '\r')
1481 /* we now have a source line in buf, null terminate and match */
1483 if (re_exec (buf
) > 0)
1487 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1488 set_internalvar (lookup_internalvar ("_"),
1489 value_from_longest (builtin_type_int
,
1491 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1497 printf_filtered ("Expression not found\n");
1503 reverse_search_command (char *regex
, int from_tty
)
1507 register FILE *stream
;
1511 line
= last_line_listed
- 1;
1513 msg
= (char *) re_comp (regex
);
1517 if (current_source_symtab
== 0)
1518 select_source_symtab (0);
1520 desc
= open_source_file (current_source_symtab
);
1522 perror_with_name (current_source_symtab
->filename
);
1524 if (current_source_symtab
->line_charpos
== 0)
1525 find_source_lines (current_source_symtab
, desc
);
1527 if (line
< 1 || line
> current_source_symtab
->nlines
)
1530 error ("Expression not found");
1533 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1536 perror_with_name (current_source_symtab
->filename
);
1539 stream
= fdopen (desc
, FDOPEN_MODE
);
1543 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1544 char buf
[4096]; /* Should be reasonable??? */
1545 register char *p
= buf
;
1554 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1556 #ifdef CRLF_SOURCE_FILES
1557 /* Remove the \r, if any, at the end of the line, otherwise
1558 regular expressions that end with $ or \n won't work. */
1559 if (p
- buf
> 1 && p
[-2] == '\r')
1566 /* We now have a source line in buf; null terminate and match. */
1568 if (re_exec (buf
) > 0)
1572 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1573 set_internalvar (lookup_internalvar ("_"),
1574 value_from_longest (builtin_type_int
,
1576 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1580 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1583 perror_with_name (current_source_symtab
->filename
);
1587 printf_filtered ("Expression not found\n");
1593 _initialize_source (void)
1595 struct cmd_list_element
*c
;
1596 current_source_symtab
= 0;
1597 init_source_path ();
1599 /* The intention is to use POSIX Basic Regular Expressions.
1600 Always use the GNU regex routine for consistency across all hosts.
1601 Our current GNU regex.c does not have all the POSIX features, so this is
1602 just an approximation. */
1603 re_set_syntax (RE_SYNTAX_GREP
);
1605 c
= add_cmd ("directory", class_files
, directory_command
,
1606 "Add directory DIR to beginning of search path for source files.\n\
1607 Forget cached info on source file locations and line positions.\n\
1608 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1609 directory in which the source file was compiled into object code.\n\
1610 With no argument, reset the search path to $cdir:$cwd, the default.",
1614 add_com_alias ("use", "directory", class_files
, 0);
1616 set_cmd_completer (c
, filename_completer
);
1618 add_cmd ("directories", no_class
, show_directories
,
1619 "Current search path for finding source files.\n\
1620 $cwd in the path means the current working directory.\n\
1621 $cdir in the path means the compilation directory of the source file.",
1626 add_com_alias ("D", "directory", class_files
, 0);
1627 add_cmd ("ld", no_class
, show_directories
,
1628 "Current search path for finding source files.\n\
1629 $cwd in the path means the current working directory.\n\
1630 $cdir in the path means the compilation directory of the source file.",
1634 add_info ("source", source_info
,
1635 "Information about the current source file.");
1637 add_info ("line", line_info
,
1638 concat ("Core addresses of the code for a source line.\n\
1639 Line can be specified as\n\
1640 LINENUM, to list around that line in current file,\n\
1641 FILE:LINENUM, to list around that line in that file,\n\
1642 FUNCTION, to list around beginning of that function,\n\
1643 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1645 Default is to describe the last source line that was listed.\n\n\
1646 This sets the default address for \"x\" to the line's first instruction\n\
1647 so that \"x/i\" suffices to start examining the machine code.\n\
1648 The address is also stored as the value of \"$_\".", NULL
));
1650 add_com ("forward-search", class_files
, forward_search_command
,
1651 "Search for regular expression (see regex(3)) from last line listed.\n\
1652 The matching line number is also stored as the value of \"$_\".");
1653 add_com_alias ("search", "forward-search", class_files
, 0);
1655 add_com ("reverse-search", class_files
, reverse_search_command
,
1656 "Search backward for regular expression (see regex(3)) from last line listed.\n\
1657 The matching line number is also stored as the value of \"$_\".");
1661 add_com_alias ("/", "forward-search", class_files
, 0);
1662 add_com_alias ("?", "reverse-search", class_files
, 0);
1665 add_com ("list", class_files
, list_command
,
1666 concat ("List specified function or line.\n\
1667 With no argument, lists ten more lines after or around previous listing.\n\
1668 \"list -\" lists the ten lines before a previous ten-line listing.\n\
1669 One argument specifies a line, and ten lines are listed around that line.\n\
1670 Two arguments with comma between specify starting and ending lines to list.\n\
1672 Lines can be specified in these ways:\n\
1673 LINENUM, to list around that line in current file,\n\
1674 FILE:LINENUM, to list around that line in that file,\n\
1675 FUNCTION, to list around beginning of that function,\n\
1676 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1677 *ADDRESS, to list around the line containing that address.\n\
1678 With two args if one is empty it stands for ten lines away from the other arg.", NULL
));
1681 add_com_alias ("l", "list", class_files
, 1);
1683 add_com_alias ("v", "list", class_files
, 1);
1686 add_com_alias ("file", "list", class_files
, 1);
1689 (add_set_cmd ("listsize", class_support
, var_uinteger
,
1690 (char *) &lines_to_list
,
1691 "Set number of source lines gdb will list by default.",
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