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, 2003
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 source_info (char *, int);
85 static void show_directories (char *, int);
87 /* Path of directories to search for source files.
88 Same format as the PATH environment variable's value. */
92 /* Symtab of default file for listing lines of. */
94 static struct symtab
*current_source_symtab
;
96 /* Default next line to list. */
98 static int current_source_line
;
100 /* Default number of lines to print with commands like "list".
101 This is based on guessing how many long (i.e. more than chars_per_line
102 characters) lines there will be. To be completely correct, "list"
103 and friends should be rewritten to count characters and see where
104 things are wrapping, but that would be a fair amount of work. */
106 int lines_to_list
= 10;
108 /* Line number of last line printed. Default for various commands.
109 current_source_line is usually, but not always, the same as this. */
111 static int last_line_listed
;
113 /* First line number listed by last listing command. */
115 static int first_line_listed
;
117 /* Saves the name of the last source file visited and a possible error code.
118 Used to prevent repeating annoying "No such file or directories" msgs */
120 static struct symtab
*last_source_visited
= NULL
;
121 static int last_source_error
= 0;
123 /* Return the first line listed by print_source_lines.
124 Used by command interpreters to request listing from
128 get_first_line_listed (void)
130 return first_line_listed
;
133 /* Return the default number of lines to print with commands like the
134 cli "list". The caller of print_source_lines must use this to
135 calculate the end line and use it in the call to print_source_lines
136 as it does not automatically use this value. */
139 get_lines_to_list (void)
141 return lines_to_list
;
144 /* Return the current source file for listing and next line to list.
145 NOTE: The returned sal pc and end fields are not valid. */
147 struct symtab_and_line
148 get_current_source_symtab_and_line (void)
150 struct symtab_and_line cursal
;
152 cursal
.symtab
= current_source_symtab
;
153 cursal
.line
= current_source_line
;
160 /* If the current source file for listing is not set, try and get a default.
161 Usually called before get_current_source_symtab_and_line() is called.
162 It may err out if a default cannot be determined.
163 We must be cautious about where it is called, as it can recurse as the
164 process of determining a new default may call the caller!
165 Use get_current_source_symtab_and_line only to get whatever
166 we have without erroring out or trying to get a default. */
169 set_default_source_symtab_and_line (void)
171 struct symtab_and_line cursal
;
173 if (!have_full_symbols () && !have_partial_symbols ())
174 error ("No symbol table is loaded. Use the \"file\" command.");
176 /* Pull in a current source symtab if necessary */
177 if (current_source_symtab
== 0)
178 select_source_symtab (0);
181 /* Return the current default file for listing and next line to list
182 (the returned sal pc and end fields are not valid.)
183 and set the current default to whatever is in SAL.
184 NOTE: The returned sal pc and end fields are not valid. */
186 struct symtab_and_line
187 set_current_source_symtab_and_line (const struct symtab_and_line
*sal
)
189 struct symtab_and_line cursal
;
191 cursal
.symtab
= current_source_symtab
;
192 cursal
.line
= current_source_line
;
194 current_source_symtab
= sal
->symtab
;
195 current_source_line
= sal
->line
;
202 /* Reset any information stored about a default file and line to print. */
205 clear_current_source_symtab_and_line (void)
207 current_source_symtab
= 0;
208 current_source_line
= 0;
211 /* Set the source file default for the "list" command to be S.
213 If S is NULL, and we don't have a default, find one. This
214 should only be called when the user actually tries to use the
215 default, since we produce an error if we can't find a reasonable
216 default. Also, since this can cause symbols to be read, doing it
217 before we need to would make things slower than necessary. */
220 select_source_symtab (struct symtab
*s
)
222 struct symtabs_and_lines sals
;
223 struct symtab_and_line sal
;
224 struct partial_symtab
*ps
;
225 struct partial_symtab
*cs_pst
= 0;
230 current_source_symtab
= s
;
231 current_source_line
= 1;
235 if (current_source_symtab
)
238 /* Make the default place to list be the function `main'
240 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0, NULL
))
242 sals
= decode_line_spec (main_name (), 1);
245 current_source_symtab
= sal
.symtab
;
246 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
247 if (current_source_symtab
)
251 /* All right; find the last file in the symtab list (ignoring .h's). */
253 current_source_line
= 1;
255 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
257 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
259 char *name
= s
->filename
;
260 int len
= strlen (name
);
261 if (!(len
> 2 && (DEPRECATED_STREQ (&name
[len
- 2], ".h"))))
263 current_source_symtab
= s
;
267 if (current_source_symtab
)
270 /* Howabout the partial symbol tables? */
272 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
274 for (ps
= ofp
->psymtabs
; ps
!= NULL
; ps
= ps
->next
)
276 char *name
= ps
->filename
;
277 int len
= strlen (name
);
278 if (!(len
> 2 && (DEPRECATED_STREQ (&name
[len
- 2], ".h"))))
288 internal_error (__FILE__
, __LINE__
,
289 "select_source_symtab: "
290 "readin pst found and no symtabs.");
294 current_source_symtab
= PSYMTAB_TO_SYMTAB (cs_pst
);
297 if (current_source_symtab
)
300 error ("Can't find a default source file");
304 show_directories (char *ignore
, int from_tty
)
306 puts_filtered ("Source directories searched: ");
307 puts_filtered (source_path
);
308 puts_filtered ("\n");
311 /* Forget what we learned about line positions in source files, and
312 which directories contain them; must check again now since files
313 may be found in a different directory now. */
316 forget_cached_source_info (void)
319 struct objfile
*objfile
;
320 struct partial_symtab
*pst
;
322 for (objfile
= object_files
; objfile
!= NULL
; objfile
= objfile
->next
)
324 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
326 if (s
->line_charpos
!= NULL
)
328 xmfree (objfile
->md
, s
->line_charpos
);
329 s
->line_charpos
= NULL
;
331 if (s
->fullname
!= NULL
)
333 xmfree (objfile
->md
, s
->fullname
);
338 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
340 if (pst
->fullname
!= NULL
)
342 xfree (pst
->fullname
);
343 pst
->fullname
= NULL
;
350 init_source_path (void)
354 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
355 source_path
= xstrdup (buf
);
356 forget_cached_source_info ();
360 init_last_source_visited (void)
362 last_source_visited
= NULL
;
365 /* Add zero or more directories to the front of the source path. */
368 directory_command (char *dirname
, int from_tty
)
371 /* FIXME, this goes to "delete dir"... */
374 if (from_tty
&& query ("Reinitialize source path to empty? "))
382 mod_path (dirname
, &source_path
);
383 last_source_visited
= NULL
;
386 show_directories ((char *) 0, from_tty
);
387 forget_cached_source_info ();
390 /* Add zero or more directories to the front of an arbitrary path. */
393 mod_path (char *dirname
, char **which_path
)
395 add_path (dirname
, which_path
, 1);
398 /* Workhorse of mod_path. Takes an extra argument to determine
399 if dirname should be parsed for separators that indicate multiple
400 directories. This allows for interfaces that pre-parse the dirname
401 and allow specification of traditional separator characters such
405 add_path (char *dirname
, char **which_path
, int parse_separators
)
407 char *old
= *which_path
;
413 dirname
= xstrdup (dirname
);
414 make_cleanup (xfree
, dirname
);
418 char *name
= dirname
;
423 char *separator
= NULL
;
427 if (parse_separators
)
429 separator
= strchr (name
, DIRNAME_SEPARATOR
);
430 space
= strchr (name
, ' ');
431 tab
= strchr (name
, '\t');
434 if (separator
== 0 && space
== 0 && tab
== 0)
435 p
= dirname
= name
+ strlen (name
);
439 if (separator
!= 0 && (p
== 0 || separator
< p
))
441 if (space
!= 0 && (p
== 0 || space
< p
))
443 if (tab
!= 0 && (p
== 0 || tab
< p
))
446 while (*dirname
== DIRNAME_SEPARATOR
453 if (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
454 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
455 /* On MS-DOS and MS-Windows, h:\ is different from h: */
456 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
458 && IS_DIR_SEPARATOR (p
[-1]))
459 /* Sigh. "foo/" => "foo" */
463 while (p
> name
&& p
[-1] == '.')
467 /* "." => getwd (). */
468 name
= current_directory
;
471 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
481 /* "...foo/." => "...foo". */
492 name
= tilde_expand (name
);
493 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
494 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
495 name
= concat (name
, ".", NULL
);
497 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
498 name
= concat (current_directory
, SLASH_STRING
, name
, NULL
);
500 name
= savestring (name
, p
- name
);
501 make_cleanup (xfree
, name
);
503 /* Unless it's a variable, check existence. */
506 /* These are warnings, not errors, since we don't want a
507 non-existent directory in a .gdbinit file to stop processing
508 of the .gdbinit file.
510 Whether they get added to the path is more debatable. Current
511 answer is yes, in case the user wants to go make the directory
512 or whatever. If the directory continues to not exist/not be
513 a directory/etc, then having them in the path should be
515 if (stat (name
, &st
) < 0)
517 int save_errno
= errno
;
518 fprintf_unfiltered (gdb_stderr
, "Warning: ");
519 print_sys_errmsg (name
, save_errno
);
521 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
522 warning ("%s is not a directory.", name
);
527 unsigned int len
= strlen (name
);
532 /* FIXME: strncmp loses in interesting ways on MS-DOS and
533 MS-Windows because of case-insensitivity and two different
534 but functionally identical slash characters. We need a
535 special filesystem-dependent file-name comparison function.
537 Actually, even on Unix I would use realpath() or its work-
538 alike before comparing. Then all the code above which
539 removes excess slashes and dots could simply go away. */
540 if (!strncmp (p
, name
, len
)
541 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
543 /* Found it in the search path, remove old copy */
545 p
--; /* Back over leading separator */
546 if (prefix
> p
- *which_path
)
547 goto skip_dup
; /* Same dir twice in one cmd */
548 strcpy (p
, &p
[len
+ 1]); /* Copy from next \0 or : */
550 p
= strchr (p
, DIRNAME_SEPARATOR
);
560 tinybuf
[0] = DIRNAME_SEPARATOR
;
563 /* If we have already tacked on a name(s) in this command, be sure they stay
564 on the front as we tack on some more. */
571 temp
= concat (old
, tinybuf
, name
, NULL
);
573 *which_path
= concat (temp
, "", &old
[prefix
], NULL
);
574 prefix
= strlen (temp
);
579 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
), old
, NULL
);
580 prefix
= strlen (name
);
588 while (*dirname
!= '\0');
593 source_info (char *ignore
, int from_tty
)
595 struct symtab
*s
= current_source_symtab
;
599 printf_filtered ("No current source file.\n");
602 printf_filtered ("Current source file is %s\n", s
->filename
);
604 printf_filtered ("Compilation directory is %s\n", s
->dirname
);
606 printf_filtered ("Located in %s\n", s
->fullname
);
608 printf_filtered ("Contains %d line%s.\n", s
->nlines
,
609 s
->nlines
== 1 ? "" : "s");
611 printf_filtered ("Source language is %s.\n", language_str (s
->language
));
612 printf_filtered ("Compiled with %s debugging format.\n", s
->debugformat
);
613 printf_filtered ("%s preprocessor macro info.\n",
614 s
->macro_table
? "Includes" : "Does not include");
618 /* Return True if the file NAME exists and is a regular file */
620 is_regular_file (const char *name
)
623 const int status
= stat (name
, &st
);
625 /* Stat should never fail except when the file does not exist.
626 If stat fails, analyze the source of error and return True
627 unless the file does not exist, to avoid returning false results
628 on obscure systems where stat does not work as expected.
631 return (errno
!= ENOENT
);
633 return S_ISREG (st
.st_mode
);
636 /* Open a file named STRING, searching path PATH (dir names sep by some char)
637 using mode MODE and protection bits PROT in the calls to open.
639 If TRY_CWD_FIRST, try to open ./STRING before searching PATH.
640 (ie pretend the first element of PATH is "."). This also indicates
641 that a slash in STRING disables searching of the path (this is
642 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
643 get that particular version of foo or an error message).
645 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
646 the actual file opened (this string will always start with a "/"). We
647 have to take special pains to avoid doubling the "/" between the directory
648 and the file, sigh! Emacs gets confuzzed by this when we print the
651 If a file is found, return the descriptor.
652 Otherwise, return -1, with errno set for the last name we tried to open. */
654 /* >>>> This should only allow files of certain types,
655 >>>> eg executable, non-directory */
657 openp (const char *path
, int try_cwd_first
, const char *string
,
659 char **filename_opened
)
671 #if defined(_WIN32) || defined(__CYGWIN__)
675 if (try_cwd_first
|| IS_ABSOLUTE_PATH (string
))
679 if (is_regular_file (string
))
681 filename
= alloca (strlen (string
) + 1);
682 strcpy (filename
, string
);
683 fd
= open (filename
, mode
, prot
);
693 for (i
= 0; string
[i
]; i
++)
694 if (IS_DIR_SEPARATOR (string
[i
]))
699 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
702 alloclen
= strlen (path
) + strlen (string
) + 2;
703 filename
= alloca (alloclen
);
705 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
707 p1
= strchr (p
, DIRNAME_SEPARATOR
);
713 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
714 && p
[2] == 'w' && p
[3] == 'd')
716 /* Name is $cwd -- insert current directory name instead. */
719 /* First, realloc the filename buffer if too short. */
720 len
= strlen (current_directory
);
721 newlen
= len
+ strlen (string
) + 2;
722 if (newlen
> alloclen
)
725 filename
= alloca (alloclen
);
727 strcpy (filename
, current_directory
);
731 /* Normal file name in path -- just use it. */
732 strncpy (filename
, p
, len
);
736 /* Remove trailing slashes */
737 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
740 strcat (filename
+ len
, SLASH_STRING
);
741 strcat (filename
, string
);
743 if (is_regular_file (filename
))
745 fd
= open (filename
, mode
);
754 /* If a file was opened, canonicalize its filename. Use xfullpath
755 rather than gdb_realpath to avoid resolving the basename part
756 of filenames when the associated file is a symbolic link. This
757 fixes a potential inconsistency between the filenames known to
758 GDB and the filenames it prints in the annotations. */
760 *filename_opened
= NULL
;
761 else if (IS_ABSOLUTE_PATH (filename
))
762 *filename_opened
= xfullpath (filename
);
765 /* Beware the // my son, the Emacs barfs, the botch that catch... */
767 char *f
= concat (current_directory
,
768 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
771 *filename_opened
= xfullpath (f
);
780 /* This is essentially a convenience, for clients that want the behaviour
781 of openp, using source_path, but that really don't want the file to be
782 opened but want instead just to know what the full pathname is (as
783 qualified against source_path).
785 The current working directory is searched first.
787 If the file was found, this function returns 1, and FULL_PATHNAME is
788 set to the fully-qualified pathname.
790 Else, this functions returns 0, and FULL_PATHNAME is set to NULL.
793 source_full_path_of (char *filename
, char **full_pathname
)
797 fd
= openp (source_path
, 1, filename
, O_RDONLY
, 0, full_pathname
);
800 *full_pathname
= NULL
;
809 /* Open a source file given a symtab S. Returns a file descriptor or
810 negative number for error. */
813 open_source_file (struct symtab
*s
)
815 char *path
= source_path
;
820 /* Quick way out if we already know its full name */
823 result
= open (s
->fullname
, OPEN_MODE
);
826 /* Didn't work -- free old one, try again. */
827 xmfree (s
->objfile
->md
, s
->fullname
);
831 if (s
->dirname
!= NULL
)
833 /* Replace a path entry of $cdir with the compilation directory name */
835 /* We cast strstr's result in case an ANSIhole has made it const,
836 which produces a "required warning" when assigned to a nonconst. */
837 p
= (char *) strstr (source_path
, "$cdir");
838 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
839 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
844 alloca (strlen (source_path
) + 1 + strlen (s
->dirname
) + 1);
845 len
= p
- source_path
;
846 strncpy (path
, source_path
, len
); /* Before $cdir */
847 strcpy (path
+ len
, s
->dirname
); /* new stuff */
848 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
852 result
= openp (path
, 0, s
->filename
, OPEN_MODE
, 0, &s
->fullname
);
855 /* Didn't work. Try using just the basename. */
856 p
= lbasename (s
->filename
);
857 if (p
!= s
->filename
)
858 result
= openp (path
, 0, p
, OPEN_MODE
, 0, &s
->fullname
);
863 fullname
= s
->fullname
;
864 s
->fullname
= mstrsave (s
->objfile
->md
, s
->fullname
);
870 /* Return the path to the source file associated with symtab. Returns NULL
874 symtab_to_filename (struct symtab
*s
)
881 /* If we've seen the file before, just return fullname. */
886 /* Try opening the file to setup fullname */
888 fd
= open_source_file (s
);
890 return s
->filename
; /* File not found. Just use short name */
892 /* Found the file. Cleanup and return the full name */
899 /* Create and initialize the table S->line_charpos that records
900 the positions of the lines in the source file, which is assumed
901 to be open on descriptor DESC.
902 All set S->nlines to the number of such lines. */
905 find_source_lines (struct symtab
*s
, int desc
)
908 char *data
, *p
, *end
;
910 int lines_allocated
= 1000;
915 line_charpos
= (int *) xmmalloc (s
->objfile
->md
,
916 lines_allocated
* sizeof (int));
917 if (fstat (desc
, &st
) < 0)
918 perror_with_name (s
->filename
);
920 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
921 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
923 mtime
= bfd_get_mtime (exec_bfd
);
925 if (mtime
&& mtime
< st
.st_mtime
)
927 warning ("Source file is more recent than executable.\n");
930 #ifdef LSEEK_NOT_LINEAR
934 /* Have to read it byte by byte to find out where the chars live */
936 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
938 while (myread (desc
, &c
, 1) > 0)
942 if (nlines
== lines_allocated
)
944 lines_allocated
*= 2;
946 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
947 sizeof (int) * lines_allocated
);
949 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
953 #else /* lseek linear. */
955 struct cleanup
*old_cleanups
;
957 /* st_size might be a large type, but we only support source files whose
958 size fits in an int. */
959 size
= (int) st
.st_size
;
961 /* Use malloc, not alloca, because this may be pretty large, and we may
962 run into various kinds of limits on stack size. */
963 data
= (char *) xmalloc (size
);
964 old_cleanups
= make_cleanup (xfree
, data
);
966 /* Reassign `size' to result of read for systems where \r\n -> \n. */
967 size
= myread (desc
, data
, size
);
969 perror_with_name (s
->filename
);
977 /* A newline at the end does not start a new line. */
980 if (nlines
== lines_allocated
)
982 lines_allocated
*= 2;
984 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
985 sizeof (int) * lines_allocated
);
987 line_charpos
[nlines
++] = p
- data
;
990 do_cleanups (old_cleanups
);
992 #endif /* lseek linear. */
995 (int *) xmrealloc (s
->objfile
->md
, (char *) line_charpos
,
996 nlines
* sizeof (int));
1000 /* Return the character position of a line LINE in symtab S.
1001 Return 0 if anything is invalid. */
1003 #if 0 /* Currently unused */
1006 source_line_charpos (struct symtab
*s
, int line
)
1010 if (!s
->line_charpos
|| line
<= 0)
1012 if (line
> s
->nlines
)
1014 return s
->line_charpos
[line
- 1];
1017 /* Return the line number of character position POS in symtab S. */
1020 source_charpos_line (struct symtab
*s
, int chr
)
1025 if (s
== 0 || s
->line_charpos
== 0)
1027 lnp
= s
->line_charpos
;
1028 /* Files are usually short, so sequential search is Ok */
1029 while (line
< s
->nlines
&& *lnp
<= chr
)
1034 if (line
>= s
->nlines
)
1042 /* Get full pathname and line number positions for a symtab.
1043 Return nonzero if line numbers may have changed.
1044 Set *FULLNAME to actual name of the file as found by `openp',
1045 or to 0 if the file is not found. */
1048 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1050 int desc
, linenums_changed
= 0;
1052 desc
= open_source_file (s
);
1060 *fullname
= s
->fullname
;
1061 if (s
->line_charpos
== 0)
1062 linenums_changed
= 1;
1063 if (linenums_changed
)
1064 find_source_lines (s
, desc
);
1066 return linenums_changed
;
1069 /* Print text describing the full name of the source file S
1070 and the line number LINE and its corresponding character position.
1071 The text starts with two Ctrl-z so that the Emacs-GDB interface
1074 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1076 Return 1 if successful, 0 if could not find the file. */
1079 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1082 if (s
->line_charpos
== 0)
1083 get_filename_and_charpos (s
, (char **) NULL
);
1084 if (s
->fullname
== 0)
1086 if (line
> s
->nlines
)
1087 /* Don't index off the end of the line_charpos array. */
1089 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1092 current_source_line
= line
;
1093 first_line_listed
= line
;
1094 last_line_listed
= line
;
1095 current_source_symtab
= s
;
1100 /* Print source lines from the file of symtab S,
1101 starting with line number LINE and stopping before line number STOPLINE. */
1103 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1106 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1111 int nlines
= stopline
- line
;
1113 /* Regardless of whether we can open the file, set current_source_symtab. */
1114 current_source_symtab
= s
;
1115 current_source_line
= line
;
1116 first_line_listed
= line
;
1118 /* If printing of source lines is disabled, just print file and line number */
1119 if (ui_out_test_flags (uiout
, ui_source_list
))
1121 /* Only prints "No such file or directory" once */
1122 if ((s
!= last_source_visited
) || (!last_source_error
))
1124 last_source_visited
= s
;
1125 desc
= open_source_file (s
);
1129 desc
= last_source_error
;
1141 last_source_error
= desc
;
1145 char *name
= alloca (strlen (s
->filename
) + 100);
1146 sprintf (name
, "%d\t%s", line
, s
->filename
);
1147 print_sys_errmsg (name
, errno
);
1150 ui_out_field_int (uiout
, "line", line
);
1151 ui_out_text (uiout
, "\tin ");
1152 ui_out_field_string (uiout
, "file", s
->filename
);
1153 ui_out_text (uiout
, "\n");
1158 last_source_error
= 0;
1160 if (s
->line_charpos
== 0)
1161 find_source_lines (s
, desc
);
1163 if (line
< 1 || line
> s
->nlines
)
1166 error ("Line number %d out of range; %s has %d lines.",
1167 line
, s
->filename
, s
->nlines
);
1170 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1173 perror_with_name (s
->filename
);
1176 stream
= fdopen (desc
, FDOPEN_MODE
);
1179 while (nlines
-- > 0)
1186 last_line_listed
= current_source_line
;
1187 sprintf (buf
, "%d\t", current_source_line
++);
1188 ui_out_text (uiout
, buf
);
1191 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1193 sprintf (buf
, "^%c", c
+ 0100);
1194 ui_out_text (uiout
, buf
);
1197 ui_out_text (uiout
, "^?");
1198 #ifdef CRLF_SOURCE_FILES
1201 /* Skip a \r character, but only before a \n. */
1202 int c1
= fgetc (stream
);
1205 printf_filtered ("^%c", c
+ 0100);
1207 ungetc (c1
, stream
);
1212 sprintf (buf
, "%c", c
);
1213 ui_out_text (uiout
, buf
);
1216 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1222 /* Show source lines from the file of symtab S, starting with line
1223 number LINE and stopping before line number STOPLINE. If this is the
1224 not the command line version, then the source is shown in the source
1225 window otherwise it is simply printed */
1228 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1230 print_source_lines_base (s
, line
, stopline
, noerror
);
1233 /* Print info on range of pc's in a specified line. */
1236 line_info (char *arg
, int from_tty
)
1238 struct symtabs_and_lines sals
;
1239 struct symtab_and_line sal
;
1240 CORE_ADDR start_pc
, end_pc
;
1243 init_sal (&sal
); /* initialize to zeroes */
1247 sal
.symtab
= current_source_symtab
;
1248 sal
.line
= last_line_listed
;
1250 sals
.sals
= (struct symtab_and_line
*)
1251 xmalloc (sizeof (struct symtab_and_line
));
1256 sals
= decode_line_spec_1 (arg
, 0);
1261 /* C++ More than one line may have been specified, as when the user
1262 specifies an overloaded function name. Print info on them all. */
1263 for (i
= 0; i
< sals
.nelts
; i
++)
1267 if (sal
.symtab
== 0)
1269 printf_filtered ("No line number information available");
1272 /* This is useful for "info line *0x7f34". If we can't tell the
1273 user about a source line, at least let them have the symbolic
1275 printf_filtered (" for address ");
1277 print_address (sal
.pc
, gdb_stdout
);
1280 printf_filtered (".");
1281 printf_filtered ("\n");
1283 else if (sal
.line
> 0
1284 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1286 if (start_pc
== end_pc
)
1288 printf_filtered ("Line %d of \"%s\"",
1289 sal
.line
, sal
.symtab
->filename
);
1291 printf_filtered (" is at address ");
1292 print_address (start_pc
, gdb_stdout
);
1294 printf_filtered (" but contains no code.\n");
1298 printf_filtered ("Line %d of \"%s\"",
1299 sal
.line
, sal
.symtab
->filename
);
1301 printf_filtered (" starts at address ");
1302 print_address (start_pc
, gdb_stdout
);
1304 printf_filtered (" and ends at ");
1305 print_address (end_pc
, gdb_stdout
);
1306 printf_filtered (".\n");
1309 /* x/i should display this line's code. */
1310 set_next_address (start_pc
);
1312 /* Repeating "info line" should do the following line. */
1313 last_line_listed
= sal
.line
+ 1;
1315 /* If this is the only line, show the source code. If it could
1316 not find the file, don't do anything special. */
1317 if (annotation_level
&& sals
.nelts
== 1)
1318 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1321 /* Is there any case in which we get here, and have an address
1322 which the user would want to see? If we have debugging symbols
1323 and no line numbers? */
1324 printf_filtered ("Line number %d is out of range for \"%s\".\n",
1325 sal
.line
, sal
.symtab
->filename
);
1330 /* Commands to search the source file for a regexp. */
1333 forward_search_command (char *regex
, int from_tty
)
1341 line
= last_line_listed
+ 1;
1343 msg
= (char *) re_comp (regex
);
1347 if (current_source_symtab
== 0)
1348 select_source_symtab (0);
1350 desc
= open_source_file (current_source_symtab
);
1352 perror_with_name (current_source_symtab
->filename
);
1354 if (current_source_symtab
->line_charpos
== 0)
1355 find_source_lines (current_source_symtab
, desc
);
1357 if (line
< 1 || line
> current_source_symtab
->nlines
)
1360 error ("Expression not found");
1363 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1366 perror_with_name (current_source_symtab
->filename
);
1369 stream
= fdopen (desc
, FDOPEN_MODE
);
1373 static char *buf
= NULL
;
1375 int cursize
, newsize
;
1378 buf
= xmalloc (cursize
);
1387 if (p
- buf
== cursize
)
1389 newsize
= cursize
+ cursize
/ 2;
1390 buf
= xrealloc (buf
, newsize
);
1395 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1397 #ifdef CRLF_SOURCE_FILES
1398 /* Remove the \r, if any, at the end of the line, otherwise
1399 regular expressions that end with $ or \n won't work. */
1400 if (p
- buf
> 1 && p
[-2] == '\r')
1407 /* we now have a source line in buf, null terminate and match */
1409 if (re_exec (buf
) > 0)
1413 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1414 set_internalvar (lookup_internalvar ("_"),
1415 value_from_longest (builtin_type_int
,
1417 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1423 printf_filtered ("Expression not found\n");
1428 reverse_search_command (char *regex
, int from_tty
)
1436 line
= last_line_listed
- 1;
1438 msg
= (char *) re_comp (regex
);
1442 if (current_source_symtab
== 0)
1443 select_source_symtab (0);
1445 desc
= open_source_file (current_source_symtab
);
1447 perror_with_name (current_source_symtab
->filename
);
1449 if (current_source_symtab
->line_charpos
== 0)
1450 find_source_lines (current_source_symtab
, desc
);
1452 if (line
< 1 || line
> current_source_symtab
->nlines
)
1455 error ("Expression not found");
1458 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1461 perror_with_name (current_source_symtab
->filename
);
1464 stream
= fdopen (desc
, FDOPEN_MODE
);
1468 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1469 char buf
[4096]; /* Should be reasonable??? */
1479 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1481 #ifdef CRLF_SOURCE_FILES
1482 /* Remove the \r, if any, at the end of the line, otherwise
1483 regular expressions that end with $ or \n won't work. */
1484 if (p
- buf
> 1 && p
[-2] == '\r')
1491 /* We now have a source line in buf; null terminate and match. */
1493 if (re_exec (buf
) > 0)
1497 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1498 set_internalvar (lookup_internalvar ("_"),
1499 value_from_longest (builtin_type_int
,
1501 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1505 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1508 perror_with_name (current_source_symtab
->filename
);
1512 printf_filtered ("Expression not found\n");
1518 _initialize_source (void)
1520 struct cmd_list_element
*c
;
1521 current_source_symtab
= 0;
1522 init_source_path ();
1524 /* The intention is to use POSIX Basic Regular Expressions.
1525 Always use the GNU regex routine for consistency across all hosts.
1526 Our current GNU regex.c does not have all the POSIX features, so this is
1527 just an approximation. */
1528 re_set_syntax (RE_SYNTAX_GREP
);
1530 c
= add_cmd ("directory", class_files
, directory_command
,
1531 "Add directory DIR to beginning of search path for source files.\n\
1532 Forget cached info on source file locations and line positions.\n\
1533 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1534 directory in which the source file was compiled into object code.\n\
1535 With no argument, reset the search path to $cdir:$cwd, the default.",
1539 add_com_alias ("use", "directory", class_files
, 0);
1541 set_cmd_completer (c
, filename_completer
);
1543 add_cmd ("directories", no_class
, show_directories
,
1544 "Current search path for finding source files.\n\
1545 $cwd in the path means the current working directory.\n\
1546 $cdir in the path means the compilation directory of the source file.",
1551 add_com_alias ("D", "directory", class_files
, 0);
1552 add_cmd ("ld", no_class
, show_directories
,
1553 "Current search path for finding source files.\n\
1554 $cwd in the path means the current working directory.\n\
1555 $cdir in the path means the compilation directory of the source file.",
1559 add_info ("source", source_info
,
1560 "Information about the current source file.");
1562 add_info ("line", line_info
,
1563 concat ("Core addresses of the code for a source line.\n\
1564 Line can be specified as\n\
1565 LINENUM, to list around that line in current file,\n\
1566 FILE:LINENUM, to list around that line in that file,\n\
1567 FUNCTION, to list around beginning of that function,\n\
1568 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1570 Default is to describe the last source line that was listed.\n\n\
1571 This sets the default address for \"x\" to the line's first instruction\n\
1572 so that \"x/i\" suffices to start examining the machine code.\n\
1573 The address is also stored as the value of \"$_\".", NULL
));
1575 add_com ("forward-search", class_files
, forward_search_command
,
1576 "Search for regular expression (see regex(3)) from last line listed.\n\
1577 The matching line number is also stored as the value of \"$_\".");
1578 add_com_alias ("search", "forward-search", class_files
, 0);
1580 add_com ("reverse-search", class_files
, reverse_search_command
,
1581 "Search backward for regular expression (see regex(3)) from last line listed.\n\
1582 The matching line number is also stored as the value of \"$_\".");
1586 add_com_alias ("/", "forward-search", class_files
, 0);
1587 add_com_alias ("?", "reverse-search", class_files
, 0);
1591 (add_set_cmd ("listsize", class_support
, var_uinteger
,
1592 (char *) &lines_to_list
,
1593 "Set number of source lines gdb will list by default.",
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