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"
47 #include <readline/readline.h>
49 #ifdef CRLF_SOURCE_FILES
51 /* Define CRLF_SOURCE_FILES in an xm-*.h file if source files on the
52 host use \r\n rather than just \n. Defining CRLF_SOURCE_FILES is
53 much faster than defining LSEEK_NOT_LINEAR. */
59 #define OPEN_MODE (O_RDONLY | O_BINARY)
60 #define FDOPEN_MODE FOPEN_RB
62 #else /* ! defined (CRLF_SOURCE_FILES) */
64 #define OPEN_MODE O_RDONLY
65 #define FDOPEN_MODE FOPEN_RT
67 #endif /* ! defined (CRLF_SOURCE_FILES) */
69 /* Prototypes for exported functions. */
71 void _initialize_source (void);
73 /* Prototypes for local functions. */
75 static int get_filename_and_charpos (struct symtab
*, char **);
77 static void reverse_search_command (char *, int);
79 static void forward_search_command (char *, int);
81 static void line_info (char *, int);
83 static void ambiguous_line_spec (struct symtabs_and_lines
*);
85 static void source_info (char *, int);
87 static void show_directories (char *, int);
89 /* Path of directories to search for source files.
90 Same format as the PATH environment variable's value. */
94 /* Symtab of default file for listing lines of. */
96 static struct symtab
*current_source_symtab
;
98 /* Default next line to list. */
100 static int current_source_line
;
102 /* Default number of lines to print with commands like "list".
103 This is based on guessing how many long (i.e. more than chars_per_line
104 characters) lines there will be. To be completely correct, "list"
105 and friends should be rewritten to count characters and see where
106 things are wrapping, but that would be a fair amount of work. */
108 int lines_to_list
= 10;
110 /* Line number of last line printed. Default for various commands.
111 current_source_line is usually, but not always, the same as this. */
113 static int last_line_listed
;
115 /* First line number listed by last listing command. */
117 static int first_line_listed
;
119 /* Saves the name of the last source file visited and a possible error code.
120 Used to prevent repeating annoying "No such file or directories" msgs */
122 static struct symtab
*last_source_visited
= NULL
;
123 static int last_source_error
= 0;
125 /* Return the first line listed by print_source_lines.
126 Used by command interpreters to request listing from
130 get_first_line_listed (void)
132 return first_line_listed
;
135 /* Return the default number of lines to print with commands like the
136 cli "list". The caller of print_source_lines must use this to
137 calculate the end line and use it in the call to print_source_lines
138 as it does not automatically use this value. */
141 get_lines_to_list (void)
143 return lines_to_list
;
146 /* Return the current source file for listing and next line to list.
147 NOTE: The returned sal pc and end fields are not valid. */
149 struct symtab_and_line
150 get_current_source_symtab_and_line (void)
152 struct symtab_and_line cursal
;
154 cursal
.symtab
= current_source_symtab
;
155 cursal
.line
= current_source_line
;
162 /* If the current source file for listing is not set, try and get a default.
163 Usually called before get_current_source_symtab_and_line() is called.
164 It may err out if a default cannot be determined.
165 We must be cautious about where it is called, as it can recurse as the
166 process of determining a new default may call the caller!
167 Use get_current_source_symtab_and_line only to get whatever
168 we have without erroring out or trying to get a default. */
171 set_default_source_symtab_and_line (void)
173 struct symtab_and_line cursal
;
175 if (!have_full_symbols () && !have_partial_symbols ())
176 error ("No symbol table is loaded. Use the \"file\" command.");
178 /* Pull in a current source symtab if necessary */
179 if (current_source_symtab
== 0)
180 select_source_symtab (0);
183 /* Return the current default file for listing and next line to list
184 (the returned sal pc and end fields are not valid.)
185 and set the current default to whatever is in SAL.
186 NOTE: The returned sal pc and end fields are not valid. */
188 struct symtab_and_line
189 set_current_source_symtab_and_line (const struct symtab_and_line
*sal
)
191 struct symtab_and_line cursal
;
193 cursal
.symtab
= current_source_symtab
;
194 cursal
.line
= current_source_line
;
196 current_source_symtab
= sal
->symtab
;
197 current_source_line
= sal
->line
;
204 /* Reset any information stored about a default file and line to print. */
207 clear_current_source_symtab_and_line (void)
209 current_source_symtab
= 0;
210 current_source_line
= 0;
213 /* Set the source file default for the "list" command to be S.
215 If S is NULL, and we don't have a default, find one. This
216 should only be called when the user actually tries to use the
217 default, since we produce an error if we can't find a reasonable
218 default. Also, since this can cause symbols to be read, doing it
219 before we need to would make things slower than necessary. */
222 select_source_symtab (register struct symtab
*s
)
224 struct symtabs_and_lines sals
;
225 struct symtab_and_line sal
;
226 struct partial_symtab
*ps
;
227 struct partial_symtab
*cs_pst
= 0;
232 current_source_symtab
= s
;
233 current_source_line
= 1;
237 if (current_source_symtab
)
240 /* Make the default place to list be the function `main'
242 if (lookup_symbol (main_name (), 0, VAR_NAMESPACE
, 0, NULL
))
244 sals
= decode_line_spec (main_name (), 1);
247 current_source_symtab
= sal
.symtab
;
248 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
249 if (current_source_symtab
)
253 /* All right; find the last file in the symtab list (ignoring .h's). */
255 current_source_line
= 1;
257 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
259 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
261 char *name
= s
->filename
;
262 int len
= strlen (name
);
263 if (!(len
> 2 && (STREQ (&name
[len
- 2], ".h"))))
265 current_source_symtab
= s
;
269 if (current_source_symtab
)
272 /* Howabout the partial symbol tables? */
274 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
276 for (ps
= ofp
->psymtabs
; ps
!= NULL
; ps
= ps
->next
)
278 char *name
= ps
->filename
;
279 int len
= strlen (name
);
280 if (!(len
> 2 && (STREQ (&name
[len
- 2], ".h"))))
290 internal_error (__FILE__
, __LINE__
,
291 "select_source_symtab: "
292 "readin pst found and no symtabs.");
296 current_source_symtab
= PSYMTAB_TO_SYMTAB (cs_pst
);
299 if (current_source_symtab
)
302 error ("Can't find a default source file");
306 show_directories (char *ignore
, int from_tty
)
308 puts_filtered ("Source directories searched: ");
309 puts_filtered (source_path
);
310 puts_filtered ("\n");
313 /* Forget what we learned about line positions in source files, and
314 which directories contain them; must check again now since files
315 may be found in a different directory now. */
318 forget_cached_source_info (void)
320 register struct symtab
*s
;
321 register struct objfile
*objfile
;
322 struct partial_symtab
*pst
;
324 for (objfile
= object_files
; objfile
!= NULL
; objfile
= objfile
->next
)
326 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
328 if (s
->line_charpos
!= NULL
)
330 xmfree (objfile
->md
, s
->line_charpos
);
331 s
->line_charpos
= NULL
;
333 if (s
->fullname
!= NULL
)
335 xmfree (objfile
->md
, s
->fullname
);
340 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
342 if (pst
->fullname
!= NULL
)
344 xfree (pst
->fullname
);
345 pst
->fullname
= NULL
;
352 init_source_path (void)
356 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
357 source_path
= xstrdup (buf
);
358 forget_cached_source_info ();
361 /* Add zero or more directories to the front of the source path. */
364 directory_command (char *dirname
, int from_tty
)
367 /* FIXME, this goes to "delete dir"... */
370 if (from_tty
&& query ("Reinitialize source path to empty? "))
378 mod_path (dirname
, &source_path
);
379 last_source_visited
= NULL
;
382 show_directories ((char *) 0, from_tty
);
383 forget_cached_source_info ();
386 /* Add zero or more directories to the front of an arbitrary path. */
389 mod_path (char *dirname
, char **which_path
)
391 char *old
= *which_path
;
397 dirname
= xstrdup (dirname
);
398 make_cleanup (xfree
, dirname
);
402 char *name
= dirname
;
407 char *separator
= strchr (name
, DIRNAME_SEPARATOR
);
408 char *space
= strchr (name
, ' ');
409 char *tab
= strchr (name
, '\t');
411 if (separator
== 0 && space
== 0 && tab
== 0)
412 p
= dirname
= name
+ strlen (name
);
416 if (separator
!= 0 && (p
== 0 || separator
< p
))
418 if (space
!= 0 && (p
== 0 || space
< p
))
420 if (tab
!= 0 && (p
== 0 || tab
< p
))
423 while (*dirname
== DIRNAME_SEPARATOR
430 if (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
431 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
432 /* On MS-DOS and MS-Windows, h:\ is different from h: */
433 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
435 && IS_DIR_SEPARATOR (p
[-1]))
436 /* Sigh. "foo/" => "foo" */
440 while (p
> name
&& p
[-1] == '.')
444 /* "." => getwd (). */
445 name
= current_directory
;
448 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
458 /* "...foo/." => "...foo". */
469 name
= tilde_expand (name
);
470 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
471 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
472 name
= concat (name
, ".", NULL
);
474 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
475 name
= concat (current_directory
, SLASH_STRING
, name
, NULL
);
477 name
= savestring (name
, p
- name
);
478 make_cleanup (xfree
, name
);
480 /* Unless it's a variable, check existence. */
483 /* These are warnings, not errors, since we don't want a
484 non-existent directory in a .gdbinit file to stop processing
485 of the .gdbinit file.
487 Whether they get added to the path is more debatable. Current
488 answer is yes, in case the user wants to go make the directory
489 or whatever. If the directory continues to not exist/not be
490 a directory/etc, then having them in the path should be
492 if (stat (name
, &st
) < 0)
494 int save_errno
= errno
;
495 fprintf_unfiltered (gdb_stderr
, "Warning: ");
496 print_sys_errmsg (name
, save_errno
);
498 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
499 warning ("%s is not a directory.", name
);
504 register unsigned int len
= strlen (name
);
509 /* FIXME: strncmp loses in interesting ways on MS-DOS and
510 MS-Windows because of case-insensitivity and two different
511 but functionally identical slash characters. We need a
512 special filesystem-dependent file-name comparison function.
514 Actually, even on Unix I would use realpath() or its work-
515 alike before comparing. Then all the code above which
516 removes excess slashes and dots could simply go away. */
517 if (!strncmp (p
, name
, len
)
518 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
520 /* Found it in the search path, remove old copy */
522 p
--; /* Back over leading separator */
523 if (prefix
> p
- *which_path
)
524 goto skip_dup
; /* Same dir twice in one cmd */
525 strcpy (p
, &p
[len
+ 1]); /* Copy from next \0 or : */
527 p
= strchr (p
, DIRNAME_SEPARATOR
);
537 tinybuf
[0] = DIRNAME_SEPARATOR
;
540 /* 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. */
547 temp
= concat (old
, tinybuf
, name
, NULL
);
549 *which_path
= concat (temp
, "", &old
[prefix
], NULL
);
550 prefix
= strlen (temp
);
555 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
), old
, NULL
);
556 prefix
= strlen (name
);
564 while (*dirname
!= '\0');
569 source_info (char *ignore
, int from_tty
)
571 register struct symtab
*s
= current_source_symtab
;
575 printf_filtered ("No current source file.\n");
578 printf_filtered ("Current source file is %s\n", s
->filename
);
580 printf_filtered ("Compilation directory is %s\n", s
->dirname
);
582 printf_filtered ("Located in %s\n", s
->fullname
);
584 printf_filtered ("Contains %d line%s.\n", s
->nlines
,
585 s
->nlines
== 1 ? "" : "s");
587 printf_filtered ("Source language is %s.\n", language_str (s
->language
));
588 printf_filtered ("Compiled with %s debugging format.\n", s
->debugformat
);
589 printf_filtered ("%s preprocessor macro info.\n",
590 s
->macro_table
? "Includes" : "Does not include");
594 /* Return True if the file NAME exists and is a regular file */
596 is_regular_file (const char *name
)
599 const int status
= stat (name
, &st
);
601 /* Stat should never fail except when the file does not exist.
602 If stat fails, analyze the source of error and return True
603 unless the file does not exist, to avoid returning false results
604 on obscure systems where stat does not work as expected.
607 return (errno
!= ENOENT
);
609 return S_ISREG (st
.st_mode
);
612 /* Open a file named STRING, searching path PATH (dir names sep by some char)
613 using mode MODE and protection bits PROT in the calls to open.
615 If TRY_CWD_FIRST, try to open ./STRING before searching PATH.
616 (ie pretend the first element of PATH is "."). This also indicates
617 that a slash in STRING disables searching of the path (this is
618 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
619 get that particular version of foo or an error message).
621 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
622 the actual file opened (this string will always start with a "/"). We
623 have to take special pains to avoid doubling the "/" between the directory
624 and the file, sigh! Emacs gets confuzzed by this when we print the
627 If a file is found, return the descriptor.
628 Otherwise, return -1, with errno set for the last name we tried to open. */
630 /* >>>> This should only allow files of certain types,
631 >>>> eg executable, non-directory */
633 openp (const char *path
, int try_cwd_first
, const char *string
,
635 char **filename_opened
)
638 register char *filename
;
647 #if defined(_WIN32) || defined(__CYGWIN__)
651 if ((try_cwd_first
|| IS_ABSOLUTE_PATH (string
)) && is_regular_file (string
))
654 filename
= alloca (strlen (string
) + 1);
655 strcpy (filename
, string
);
656 fd
= open (filename
, mode
, prot
);
659 for (i
= 0; string
[i
]; i
++)
660 if (IS_DIR_SEPARATOR (string
[i
]))
665 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
668 alloclen
= strlen (path
) + strlen (string
) + 2;
669 filename
= alloca (alloclen
);
671 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
673 p1
= strchr (p
, DIRNAME_SEPARATOR
);
679 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
680 && p
[2] == 'w' && p
[3] == 'd')
682 /* Name is $cwd -- insert current directory name instead. */
685 /* First, realloc the filename buffer if too short. */
686 len
= strlen (current_directory
);
687 newlen
= len
+ strlen (string
) + 2;
688 if (newlen
> alloclen
)
691 filename
= alloca (alloclen
);
693 strcpy (filename
, current_directory
);
697 /* Normal file name in path -- just use it. */
698 strncpy (filename
, p
, len
);
702 /* Remove trailing slashes */
703 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
706 strcat (filename
+ len
, SLASH_STRING
);
707 strcat (filename
, string
);
709 if (is_regular_file (filename
))
711 fd
= open (filename
, mode
);
720 /* If a file was opened, canonicalize its filename. Use xfullpath
721 rather than gdb_realpath to avoid resolving the basename part
722 of filenames when the associated file is a symbolic link. This
723 fixes a potential inconsistency between the filenames known to
724 GDB and the filenames it prints in the annotations. */
726 *filename_opened
= NULL
;
727 else if (IS_ABSOLUTE_PATH (filename
))
728 *filename_opened
= xfullpath (filename
);
731 /* Beware the // my son, the Emacs barfs, the botch that catch... */
733 char *f
= concat (current_directory
,
734 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
737 *filename_opened
= xfullpath (f
);
746 /* This is essentially a convenience, for clients that want the behaviour
747 of openp, using source_path, but that really don't want the file to be
748 opened but want instead just to know what the full pathname is (as
749 qualified against source_path).
751 The current working directory is searched first.
753 If the file was found, this function returns 1, and FULL_PATHNAME is
754 set to the fully-qualified pathname.
756 Else, this functions returns 0, and FULL_PATHNAME is set to NULL.
759 source_full_path_of (char *filename
, char **full_pathname
)
763 fd
= openp (source_path
, 1, filename
, O_RDONLY
, 0, full_pathname
);
766 *full_pathname
= NULL
;
775 /* Open a source file given a symtab S. Returns a file descriptor or
776 negative number for error. */
779 open_source_file (struct symtab
*s
)
781 char *path
= source_path
;
786 /* Quick way out if we already know its full name */
789 result
= open (s
->fullname
, OPEN_MODE
);
792 /* Didn't work -- free old one, try again. */
793 xmfree (s
->objfile
->md
, s
->fullname
);
797 if (s
->dirname
!= NULL
)
799 /* Replace a path entry of $cdir with the compilation directory name */
801 /* We cast strstr's result in case an ANSIhole has made it const,
802 which produces a "required warning" when assigned to a nonconst. */
803 p
= (char *) strstr (source_path
, "$cdir");
804 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
805 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
810 alloca (strlen (source_path
) + 1 + strlen (s
->dirname
) + 1);
811 len
= p
- source_path
;
812 strncpy (path
, source_path
, len
); /* Before $cdir */
813 strcpy (path
+ len
, s
->dirname
); /* new stuff */
814 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
818 result
= openp (path
, 0, s
->filename
, OPEN_MODE
, 0, &s
->fullname
);
821 /* Didn't work. Try using just the basename. */
822 p
= lbasename (s
->filename
);
823 if (p
!= s
->filename
)
824 result
= openp (path
, 0, p
, OPEN_MODE
, 0, &s
->fullname
);
829 fullname
= s
->fullname
;
830 s
->fullname
= mstrsave (s
->objfile
->md
, s
->fullname
);
836 /* Return the path to the source file associated with symtab. Returns NULL
840 symtab_to_filename (struct symtab
*s
)
847 /* If we've seen the file before, just return fullname. */
852 /* Try opening the file to setup fullname */
854 fd
= open_source_file (s
);
856 return s
->filename
; /* File not found. Just use short name */
858 /* Found the file. Cleanup and return the full name */
865 /* Create and initialize the table S->line_charpos that records
866 the positions of the lines in the source file, which is assumed
867 to be open on descriptor DESC.
868 All set S->nlines to the number of such lines. */
871 find_source_lines (struct symtab
*s
, int desc
)
874 register char *data
, *p
, *end
;
876 int lines_allocated
= 1000;
881 line_charpos
= (int *) xmmalloc (s
->objfile
->md
,
882 lines_allocated
* sizeof (int));
883 if (fstat (desc
, &st
) < 0)
884 perror_with_name (s
->filename
);
886 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
887 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
889 mtime
= bfd_get_mtime (exec_bfd
);
891 if (mtime
&& mtime
< st
.st_mtime
)
893 warning ("Source file is more recent than executable.\n");
896 #ifdef LSEEK_NOT_LINEAR
900 /* Have to read it byte by byte to find out where the chars live */
902 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
904 while (myread (desc
, &c
, 1) > 0)
908 if (nlines
== lines_allocated
)
910 lines_allocated
*= 2;
912 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
913 sizeof (int) * lines_allocated
);
915 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
919 #else /* lseek linear. */
921 struct cleanup
*old_cleanups
;
923 /* st_size might be a large type, but we only support source files whose
924 size fits in an int. */
925 size
= (int) st
.st_size
;
927 /* Use malloc, not alloca, because this may be pretty large, and we may
928 run into various kinds of limits on stack size. */
929 data
= (char *) xmalloc (size
);
930 old_cleanups
= make_cleanup (xfree
, data
);
932 /* Reassign `size' to result of read for systems where \r\n -> \n. */
933 size
= myread (desc
, data
, size
);
935 perror_with_name (s
->filename
);
943 /* A newline at the end does not start a new line. */
946 if (nlines
== lines_allocated
)
948 lines_allocated
*= 2;
950 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
951 sizeof (int) * lines_allocated
);
953 line_charpos
[nlines
++] = p
- data
;
956 do_cleanups (old_cleanups
);
958 #endif /* lseek linear. */
961 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
962 nlines
* sizeof (int));
966 /* Return the character position of a line LINE in symtab S.
967 Return 0 if anything is invalid. */
969 #if 0 /* Currently unused */
972 source_line_charpos (struct symtab
*s
, int line
)
976 if (!s
->line_charpos
|| line
<= 0)
978 if (line
> s
->nlines
)
980 return s
->line_charpos
[line
- 1];
983 /* Return the line number of character position POS in symtab S. */
986 source_charpos_line (register struct symtab
*s
, register int chr
)
988 register int line
= 0;
991 if (s
== 0 || s
->line_charpos
== 0)
993 lnp
= s
->line_charpos
;
994 /* Files are usually short, so sequential search is Ok */
995 while (line
< s
->nlines
&& *lnp
<= chr
)
1000 if (line
>= s
->nlines
)
1008 /* Get full pathname and line number positions for a symtab.
1009 Return nonzero if line numbers may have changed.
1010 Set *FULLNAME to actual name of the file as found by `openp',
1011 or to 0 if the file is not found. */
1014 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1016 register int desc
, linenums_changed
= 0;
1018 desc
= open_source_file (s
);
1026 *fullname
= s
->fullname
;
1027 if (s
->line_charpos
== 0)
1028 linenums_changed
= 1;
1029 if (linenums_changed
)
1030 find_source_lines (s
, desc
);
1032 return linenums_changed
;
1035 /* Print text describing the full name of the source file S
1036 and the line number LINE and its corresponding character position.
1037 The text starts with two Ctrl-z so that the Emacs-GDB interface
1040 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1042 Return 1 if successful, 0 if could not find the file. */
1045 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1048 if (s
->line_charpos
== 0)
1049 get_filename_and_charpos (s
, (char **) NULL
);
1050 if (s
->fullname
== 0)
1052 if (line
> s
->nlines
)
1053 /* Don't index off the end of the line_charpos array. */
1055 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1058 current_source_line
= line
;
1059 first_line_listed
= line
;
1060 last_line_listed
= line
;
1061 current_source_symtab
= s
;
1066 /* Print source lines from the file of symtab S,
1067 starting with line number LINE and stopping before line number STOPLINE. */
1069 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1072 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1076 register FILE *stream
;
1077 int nlines
= stopline
- line
;
1079 /* Regardless of whether we can open the file, set current_source_symtab. */
1080 current_source_symtab
= s
;
1081 current_source_line
= line
;
1082 first_line_listed
= line
;
1084 /* If printing of source lines is disabled, just print file and line number */
1085 if (ui_out_test_flags (uiout
, ui_source_list
))
1087 /* Only prints "No such file or directory" once */
1088 if ((s
!= last_source_visited
) || (!last_source_error
))
1090 last_source_visited
= s
;
1091 desc
= open_source_file (s
);
1095 desc
= last_source_error
;
1107 last_source_error
= desc
;
1111 char *name
= alloca (strlen (s
->filename
) + 100);
1112 sprintf (name
, "%d\t%s", line
, s
->filename
);
1113 print_sys_errmsg (name
, errno
);
1116 ui_out_field_int (uiout
, "line", line
);
1117 ui_out_text (uiout
, "\tin ");
1118 ui_out_field_string (uiout
, "file", s
->filename
);
1119 ui_out_text (uiout
, "\n");
1124 last_source_error
= 0;
1126 if (s
->line_charpos
== 0)
1127 find_source_lines (s
, desc
);
1129 if (line
< 1 || line
> s
->nlines
)
1132 error ("Line number %d out of range; %s has %d lines.",
1133 line
, s
->filename
, s
->nlines
);
1136 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1139 perror_with_name (s
->filename
);
1142 stream
= fdopen (desc
, FDOPEN_MODE
);
1145 while (nlines
-- > 0)
1152 last_line_listed
= current_source_line
;
1153 sprintf (buf
, "%d\t", current_source_line
++);
1154 ui_out_text (uiout
, buf
);
1157 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1159 sprintf (buf
, "^%c", c
+ 0100);
1160 ui_out_text (uiout
, buf
);
1163 ui_out_text (uiout
, "^?");
1164 #ifdef CRLF_SOURCE_FILES
1167 /* Skip a \r character, but only before a \n. */
1168 int c1
= fgetc (stream
);
1171 printf_filtered ("^%c", c
+ 0100);
1173 ungetc (c1
, stream
);
1178 sprintf (buf
, "%c", c
);
1179 ui_out_text (uiout
, buf
);
1182 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1188 /* Show source lines from the file of symtab S, starting with line
1189 number LINE and stopping before line number STOPLINE. If this is the
1190 not the command line version, then the source is shown in the source
1191 window otherwise it is simply printed */
1194 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1196 print_source_lines_base (s
, line
, stopline
, noerror
);
1199 /* Print a list of files and line numbers which a user may choose from
1200 in order to list a function which was specified ambiguously (as with
1201 `list classname::overloadedfuncname', or 'list objectiveCSelector:).
1202 The vector in SALS provides the filenames and line numbers.
1203 NOTE: some of the SALS may have no filename or line information! */
1206 ambiguous_line_spec (struct symtabs_and_lines
*sals
)
1210 for (i
= 0; i
< sals
->nelts
; ++i
)
1211 printf_filtered ("file: \"%s\", line number: %d\n",
1212 sals
->sals
[i
].symtab
->filename
, sals
->sals
[i
].line
);
1215 /* Print info on range of pc's in a specified line. */
1218 line_info (char *arg
, int from_tty
)
1220 struct symtabs_and_lines sals
;
1221 struct symtab_and_line sal
;
1222 CORE_ADDR start_pc
, end_pc
;
1225 init_sal (&sal
); /* initialize to zeroes */
1229 sal
.symtab
= current_source_symtab
;
1230 sal
.line
= last_line_listed
;
1232 sals
.sals
= (struct symtab_and_line
*)
1233 xmalloc (sizeof (struct symtab_and_line
));
1238 sals
= decode_line_spec_1 (arg
, 0);
1243 /* C++ More than one line may have been specified, as when the user
1244 specifies an overloaded function name. Print info on them all. */
1245 for (i
= 0; i
< sals
.nelts
; i
++)
1249 if (sal
.symtab
== 0)
1251 printf_filtered ("No line number information available");
1254 /* This is useful for "info line *0x7f34". If we can't tell the
1255 user about a source line, at least let them have the symbolic
1257 printf_filtered (" for address ");
1259 print_address (sal
.pc
, gdb_stdout
);
1262 printf_filtered (".");
1263 printf_filtered ("\n");
1265 else if (sal
.line
> 0
1266 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1268 if (start_pc
== end_pc
)
1270 printf_filtered ("Line %d of \"%s\"",
1271 sal
.line
, sal
.symtab
->filename
);
1273 printf_filtered (" is at address ");
1274 print_address (start_pc
, gdb_stdout
);
1276 printf_filtered (" but contains no code.\n");
1280 printf_filtered ("Line %d of \"%s\"",
1281 sal
.line
, sal
.symtab
->filename
);
1283 printf_filtered (" starts at address ");
1284 print_address (start_pc
, gdb_stdout
);
1286 printf_filtered (" and ends at ");
1287 print_address (end_pc
, gdb_stdout
);
1288 printf_filtered (".\n");
1291 /* x/i should display this line's code. */
1292 set_next_address (start_pc
);
1294 /* Repeating "info line" should do the following line. */
1295 last_line_listed
= sal
.line
+ 1;
1297 /* If this is the only line, show the source code. If it could
1298 not find the file, don't do anything special. */
1299 if (annotation_level
&& sals
.nelts
== 1)
1300 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1303 /* Is there any case in which we get here, and have an address
1304 which the user would want to see? If we have debugging symbols
1305 and no line numbers? */
1306 printf_filtered ("Line number %d is out of range for \"%s\".\n",
1307 sal
.line
, sal
.symtab
->filename
);
1312 /* Commands to search the source file for a regexp. */
1316 forward_search_command (char *regex
, int from_tty
)
1320 register FILE *stream
;
1324 line
= last_line_listed
+ 1;
1326 msg
= (char *) re_comp (regex
);
1330 if (current_source_symtab
== 0)
1331 select_source_symtab (0);
1333 desc
= open_source_file (current_source_symtab
);
1335 perror_with_name (current_source_symtab
->filename
);
1337 if (current_source_symtab
->line_charpos
== 0)
1338 find_source_lines (current_source_symtab
, desc
);
1340 if (line
< 1 || line
> current_source_symtab
->nlines
)
1343 error ("Expression not found");
1346 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1349 perror_with_name (current_source_symtab
->filename
);
1352 stream
= fdopen (desc
, FDOPEN_MODE
);
1356 static char *buf
= NULL
;
1358 int cursize
, newsize
;
1361 buf
= xmalloc (cursize
);
1370 if (p
- buf
== cursize
)
1372 newsize
= cursize
+ cursize
/ 2;
1373 buf
= xrealloc (buf
, newsize
);
1378 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1380 #ifdef CRLF_SOURCE_FILES
1381 /* Remove the \r, if any, at the end of the line, otherwise
1382 regular expressions that end with $ or \n won't work. */
1383 if (p
- buf
> 1 && p
[-2] == '\r')
1390 /* we now have a source line in buf, null terminate and match */
1392 if (re_exec (buf
) > 0)
1396 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1397 set_internalvar (lookup_internalvar ("_"),
1398 value_from_longest (builtin_type_int
,
1400 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1406 printf_filtered ("Expression not found\n");
1412 reverse_search_command (char *regex
, int from_tty
)
1416 register FILE *stream
;
1420 line
= last_line_listed
- 1;
1422 msg
= (char *) re_comp (regex
);
1426 if (current_source_symtab
== 0)
1427 select_source_symtab (0);
1429 desc
= open_source_file (current_source_symtab
);
1431 perror_with_name (current_source_symtab
->filename
);
1433 if (current_source_symtab
->line_charpos
== 0)
1434 find_source_lines (current_source_symtab
, desc
);
1436 if (line
< 1 || line
> current_source_symtab
->nlines
)
1439 error ("Expression not found");
1442 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1445 perror_with_name (current_source_symtab
->filename
);
1448 stream
= fdopen (desc
, FDOPEN_MODE
);
1452 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1453 char buf
[4096]; /* Should be reasonable??? */
1454 register char *p
= buf
;
1463 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1465 #ifdef CRLF_SOURCE_FILES
1466 /* Remove the \r, if any, at the end of the line, otherwise
1467 regular expressions that end with $ or \n won't work. */
1468 if (p
- buf
> 1 && p
[-2] == '\r')
1475 /* We now have a source line in buf; null terminate and match. */
1477 if (re_exec (buf
) > 0)
1481 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1482 set_internalvar (lookup_internalvar ("_"),
1483 value_from_longest (builtin_type_int
,
1485 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1489 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1492 perror_with_name (current_source_symtab
->filename
);
1496 printf_filtered ("Expression not found\n");
1502 _initialize_source (void)
1504 struct cmd_list_element
*c
;
1505 current_source_symtab
= 0;
1506 init_source_path ();
1508 /* The intention is to use POSIX Basic Regular Expressions.
1509 Always use the GNU regex routine for consistency across all hosts.
1510 Our current GNU regex.c does not have all the POSIX features, so this is
1511 just an approximation. */
1512 re_set_syntax (RE_SYNTAX_GREP
);
1514 c
= add_cmd ("directory", class_files
, directory_command
,
1515 "Add directory DIR to beginning of search path for source files.\n\
1516 Forget cached info on source file locations and line positions.\n\
1517 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1518 directory in which the source file was compiled into object code.\n\
1519 With no argument, reset the search path to $cdir:$cwd, the default.",
1523 add_com_alias ("use", "directory", class_files
, 0);
1525 set_cmd_completer (c
, filename_completer
);
1527 add_cmd ("directories", no_class
, show_directories
,
1528 "Current search path for finding source files.\n\
1529 $cwd in the path means the current working directory.\n\
1530 $cdir in the path means the compilation directory of the source file.",
1535 add_com_alias ("D", "directory", class_files
, 0);
1536 add_cmd ("ld", no_class
, show_directories
,
1537 "Current search path for finding source files.\n\
1538 $cwd in the path means the current working directory.\n\
1539 $cdir in the path means the compilation directory of the source file.",
1543 add_info ("source", source_info
,
1544 "Information about the current source file.");
1546 add_info ("line", line_info
,
1547 concat ("Core addresses of the code for a source line.\n\
1548 Line can be specified as\n\
1549 LINENUM, to list around that line in current file,\n\
1550 FILE:LINENUM, to list around that line in that file,\n\
1551 FUNCTION, to list around beginning of that function,\n\
1552 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1554 Default is to describe the last source line that was listed.\n\n\
1555 This sets the default address for \"x\" to the line's first instruction\n\
1556 so that \"x/i\" suffices to start examining the machine code.\n\
1557 The address is also stored as the value of \"$_\".", NULL
));
1559 add_com ("forward-search", class_files
, forward_search_command
,
1560 "Search for regular expression (see regex(3)) from last line listed.\n\
1561 The matching line number is also stored as the value of \"$_\".");
1562 add_com_alias ("search", "forward-search", class_files
, 0);
1564 add_com ("reverse-search", class_files
, reverse_search_command
,
1565 "Search backward for regular expression (see regex(3)) from last line listed.\n\
1566 The matching line number is also stored as the value of \"$_\".");
1570 add_com_alias ("/", "forward-search", class_files
, 0);
1571 add_com_alias ("?", "reverse-search", class_files
, 0);
1575 (add_set_cmd ("listsize", class_support
, var_uinteger
,
1576 (char *) &lines_to_list
,
1577 "Set number of source lines gdb will list by default.",
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