1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
3 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
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., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, 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"
53 #define OPEN_MODE (O_RDONLY | O_BINARY)
54 #define FDOPEN_MODE FOPEN_RB
56 /* Prototypes for exported functions. */
58 void _initialize_source (void);
60 /* Prototypes for local functions. */
62 static int get_filename_and_charpos (struct symtab
*, char **);
64 static void reverse_search_command (char *, int);
66 static void forward_search_command (char *, int);
68 static void line_info (char *, int);
70 static void source_info (char *, int);
72 static void show_directories (char *, int);
74 /* Path of directories to search for source files.
75 Same format as the PATH environment variable's value. */
79 /* Symtab of default file for listing lines of. */
81 static struct symtab
*current_source_symtab
;
83 /* Default next line to list. */
85 static int current_source_line
;
87 /* Default number of lines to print with commands like "list".
88 This is based on guessing how many long (i.e. more than chars_per_line
89 characters) lines there will be. To be completely correct, "list"
90 and friends should be rewritten to count characters and see where
91 things are wrapping, but that would be a fair amount of work. */
93 int lines_to_list
= 10;
95 show_lines_to_list (struct ui_file
*file
, int from_tty
,
96 struct cmd_list_element
*c
, const char *value
)
98 fprintf_filtered (file
, _("\
99 Number of source lines gdb will list by default is %s.\n"),
103 /* Line number of last line printed. Default for various commands.
104 current_source_line is usually, but not always, the same as this. */
106 static int last_line_listed
;
108 /* First line number listed by last listing command. */
110 static int first_line_listed
;
112 /* Saves the name of the last source file visited and a possible error code.
113 Used to prevent repeating annoying "No such file or directories" msgs */
115 static struct symtab
*last_source_visited
= NULL
;
116 static int last_source_error
= 0;
118 /* Return the first line listed by print_source_lines.
119 Used by command interpreters to request listing from
123 get_first_line_listed (void)
125 return first_line_listed
;
128 /* Return the default number of lines to print with commands like the
129 cli "list". The caller of print_source_lines must use this to
130 calculate the end line and use it in the call to print_source_lines
131 as it does not automatically use this value. */
134 get_lines_to_list (void)
136 return lines_to_list
;
139 /* Return the current source file for listing and next line to list.
140 NOTE: The returned sal pc and end fields are not valid. */
142 struct symtab_and_line
143 get_current_source_symtab_and_line (void)
145 struct symtab_and_line cursal
= { };
147 cursal
.symtab
= current_source_symtab
;
148 cursal
.line
= current_source_line
;
155 /* If the current source file for listing is not set, try and get a default.
156 Usually called before get_current_source_symtab_and_line() is called.
157 It may err out if a default cannot be determined.
158 We must be cautious about where it is called, as it can recurse as the
159 process of determining a new default may call the caller!
160 Use get_current_source_symtab_and_line only to get whatever
161 we have without erroring out or trying to get a default. */
164 set_default_source_symtab_and_line (void)
166 struct symtab_and_line cursal
;
168 if (!have_full_symbols () && !have_partial_symbols ())
169 error (_("No symbol table is loaded. Use the \"file\" command."));
171 /* Pull in a current source symtab if necessary */
172 if (current_source_symtab
== 0)
173 select_source_symtab (0);
176 /* Return the current default file for listing and next line to list
177 (the returned sal pc and end fields are not valid.)
178 and set the current default to whatever is in SAL.
179 NOTE: The returned sal pc and end fields are not valid. */
181 struct symtab_and_line
182 set_current_source_symtab_and_line (const struct symtab_and_line
*sal
)
184 struct symtab_and_line cursal
= { };
186 cursal
.symtab
= current_source_symtab
;
187 cursal
.line
= current_source_line
;
189 current_source_symtab
= sal
->symtab
;
190 current_source_line
= sal
->line
;
197 /* Reset any information stored about a default file and line to print. */
200 clear_current_source_symtab_and_line (void)
202 current_source_symtab
= 0;
203 current_source_line
= 0;
206 /* Set the source file default for the "list" command to be S.
208 If S is NULL, and we don't have a default, find one. This
209 should only be called when the user actually tries to use the
210 default, since we produce an error if we can't find a reasonable
211 default. Also, since this can cause symbols to be read, doing it
212 before we need to would make things slower than necessary. */
215 select_source_symtab (struct symtab
*s
)
217 struct symtabs_and_lines sals
;
218 struct symtab_and_line sal
;
219 struct partial_symtab
*ps
;
220 struct partial_symtab
*cs_pst
= 0;
225 current_source_symtab
= s
;
226 current_source_line
= 1;
230 if (current_source_symtab
)
233 /* Make the default place to list be the function `main'
235 if (lookup_symbol (main_name (), 0, VAR_DOMAIN
, 0, NULL
))
237 sals
= decode_line_spec (main_name (), 1);
240 current_source_symtab
= sal
.symtab
;
241 current_source_line
= max (sal
.line
- (lines_to_list
- 1), 1);
242 if (current_source_symtab
)
246 /* All right; find the last file in the symtab list (ignoring .h's). */
248 current_source_line
= 1;
250 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
252 for (s
= ofp
->symtabs
; s
; s
= s
->next
)
254 const char *name
= s
->filename
;
255 int len
= strlen (name
);
256 if (!(len
> 2 && strcmp(&name
[len
- 2], ".h") == 0))
257 current_source_symtab
= s
;
260 if (current_source_symtab
)
263 /* Howabout the partial symbol tables? */
265 for (ofp
= object_files
; ofp
!= NULL
; ofp
= ofp
->next
)
267 for (ps
= ofp
->psymtabs
; ps
!= NULL
; ps
= ps
->next
)
269 const char *name
= ps
->filename
;
270 int len
= strlen (name
);
271 if (!(len
> 2 && strcmp (&name
[len
- 2], ".h") == 0))
279 internal_error (__FILE__
, __LINE__
,
280 _("select_source_symtab: "
281 "readin pst found and no symtabs."));
285 current_source_symtab
= PSYMTAB_TO_SYMTAB (cs_pst
);
288 if (current_source_symtab
)
291 error (_("Can't find a default source file"));
295 show_directories (char *ignore
, int from_tty
)
297 puts_filtered ("Source directories searched: ");
298 puts_filtered (source_path
);
299 puts_filtered ("\n");
302 /* Forget what we learned about line positions in source files, and
303 which directories contain them; must check again now since files
304 may be found in a different directory now. */
307 forget_cached_source_info (void)
310 struct objfile
*objfile
;
311 struct partial_symtab
*pst
;
313 for (objfile
= object_files
; objfile
!= NULL
; objfile
= objfile
->next
)
315 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
317 if (s
->line_charpos
!= NULL
)
319 xfree (s
->line_charpos
);
320 s
->line_charpos
= NULL
;
322 if (s
->fullname
!= NULL
)
329 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
331 if (pst
->fullname
!= NULL
)
333 xfree (pst
->fullname
);
334 pst
->fullname
= NULL
;
341 init_source_path (void)
345 sprintf (buf
, "$cdir%c$cwd", DIRNAME_SEPARATOR
);
346 source_path
= xstrdup (buf
);
347 forget_cached_source_info ();
351 init_last_source_visited (void)
353 last_source_visited
= NULL
;
356 /* Add zero or more directories to the front of the source path. */
359 directory_command (char *dirname
, int from_tty
)
362 /* FIXME, this goes to "delete dir"... */
365 if (from_tty
&& query (_("Reinitialize source path to empty? ")))
373 mod_path (dirname
, &source_path
);
374 last_source_visited
= NULL
;
377 show_directories ((char *) 0, from_tty
);
378 forget_cached_source_info ();
381 /* Add zero or more directories to the front of an arbitrary path. */
384 mod_path (char *dirname
, char **which_path
)
386 add_path (dirname
, which_path
, 1);
389 /* Workhorse of mod_path. Takes an extra argument to determine
390 if dirname should be parsed for separators that indicate multiple
391 directories. This allows for interfaces that pre-parse the dirname
392 and allow specification of traditional separator characters such
396 add_path (char *dirname
, char **which_path
, int parse_separators
)
398 char *old
= *which_path
;
404 dirname
= xstrdup (dirname
);
405 make_cleanup (xfree
, dirname
);
409 char *name
= dirname
;
414 char *separator
= NULL
;
418 if (parse_separators
)
420 separator
= strchr (name
, DIRNAME_SEPARATOR
);
421 space
= strchr (name
, ' ');
422 tab
= strchr (name
, '\t');
425 if (separator
== 0 && space
== 0 && tab
== 0)
426 p
= dirname
= name
+ strlen (name
);
430 if (separator
!= 0 && (p
== 0 || separator
< p
))
432 if (space
!= 0 && (p
== 0 || space
< p
))
434 if (tab
!= 0 && (p
== 0 || tab
< p
))
437 while (*dirname
== DIRNAME_SEPARATOR
444 if (!(IS_DIR_SEPARATOR (*name
) && p
<= name
+ 1) /* "/" */
445 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
446 /* On MS-DOS and MS-Windows, h:\ is different from h: */
447 && !(p
== name
+ 3 && name
[1] == ':') /* "d:/" */
449 && IS_DIR_SEPARATOR (p
[-1]))
450 /* Sigh. "foo/" => "foo" */
454 while (p
> name
&& p
[-1] == '.')
458 /* "." => getwd (). */
459 name
= current_directory
;
462 else if (p
> name
+ 1 && IS_DIR_SEPARATOR (p
[-2]))
472 /* "...foo/." => "...foo". */
483 name
= tilde_expand (name
);
484 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
485 else if (IS_ABSOLUTE_PATH (name
) && p
== name
+ 2) /* "d:" => "d:." */
486 name
= concat (name
, ".", (char *)NULL
);
488 else if (!IS_ABSOLUTE_PATH (name
) && name
[0] != '$')
489 name
= concat (current_directory
, SLASH_STRING
, name
, (char *)NULL
);
491 name
= savestring (name
, p
- name
);
492 make_cleanup (xfree
, name
);
494 /* Unless it's a variable, check existence. */
497 /* These are warnings, not errors, since we don't want a
498 non-existent directory in a .gdbinit file to stop processing
499 of the .gdbinit file.
501 Whether they get added to the path is more debatable. Current
502 answer is yes, in case the user wants to go make the directory
503 or whatever. If the directory continues to not exist/not be
504 a directory/etc, then having them in the path should be
506 if (stat (name
, &st
) < 0)
508 int save_errno
= errno
;
509 fprintf_unfiltered (gdb_stderr
, "Warning: ");
510 print_sys_errmsg (name
, save_errno
);
512 else if ((st
.st_mode
& S_IFMT
) != S_IFDIR
)
513 warning (_("%s is not a directory."), name
);
518 unsigned int len
= strlen (name
);
523 /* FIXME: strncmp loses in interesting ways on MS-DOS and
524 MS-Windows because of case-insensitivity and two different
525 but functionally identical slash characters. We need a
526 special filesystem-dependent file-name comparison function.
528 Actually, even on Unix I would use realpath() or its work-
529 alike before comparing. Then all the code above which
530 removes excess slashes and dots could simply go away. */
531 if (!strncmp (p
, name
, len
)
532 && (p
[len
] == '\0' || p
[len
] == DIRNAME_SEPARATOR
))
534 /* Found it in the search path, remove old copy */
536 p
--; /* Back over leading separator */
537 if (prefix
> p
- *which_path
)
538 goto skip_dup
; /* Same dir twice in one cmd */
539 strcpy (p
, &p
[len
+ 1]); /* Copy from next \0 or : */
541 p
= strchr (p
, DIRNAME_SEPARATOR
);
551 tinybuf
[0] = DIRNAME_SEPARATOR
;
554 /* If we have already tacked on a name(s) in this command, be sure they stay
555 on the front as we tack on some more. */
562 temp
= concat (old
, tinybuf
, name
, (char *)NULL
);
564 *which_path
= concat (temp
, "", &old
[prefix
], (char *)NULL
);
565 prefix
= strlen (temp
);
570 *which_path
= concat (name
, (old
[0] ? tinybuf
: old
),
572 prefix
= strlen (name
);
580 while (*dirname
!= '\0');
585 source_info (char *ignore
, int from_tty
)
587 struct symtab
*s
= current_source_symtab
;
591 printf_filtered (_("No current source file.\n"));
594 printf_filtered (_("Current source file is %s\n"), s
->filename
);
596 printf_filtered (_("Compilation directory is %s\n"), s
->dirname
);
598 printf_filtered (_("Located in %s\n"), s
->fullname
);
600 printf_filtered (_("Contains %d line%s.\n"), s
->nlines
,
601 s
->nlines
== 1 ? "" : "s");
603 printf_filtered (_("Source language is %s.\n"), language_str (s
->language
));
604 printf_filtered (_("Compiled with %s debugging format.\n"), s
->debugformat
);
605 printf_filtered (_("%s preprocessor macro info.\n"),
606 s
->macro_table
? "Includes" : "Does not include");
610 /* Return True if the file NAME exists and is a regular file */
612 is_regular_file (const char *name
)
615 const int status
= stat (name
, &st
);
617 /* Stat should never fail except when the file does not exist.
618 If stat fails, analyze the source of error and return True
619 unless the file does not exist, to avoid returning false results
620 on obscure systems where stat does not work as expected.
623 return (errno
!= ENOENT
);
625 return S_ISREG (st
.st_mode
);
628 /* Open a file named STRING, searching path PATH (dir names sep by some char)
629 using mode MODE and protection bits PROT in the calls to open.
631 OPTS specifies the function behaviour in specific cases.
633 If OPF_TRY_CWD_FIRST, try to open ./STRING before searching PATH.
634 (ie pretend the first element of PATH is "."). This also indicates
635 that a slash in STRING disables searching of the path (this is
636 so that "exec-file ./foo" or "symbol-file ./foo" insures that you
637 get that particular version of foo or an error message).
639 If OPTS has OPF_SEARCH_IN_PATH set, absolute names will also be
640 searched in path (we usually want this for source files but not for
643 If FILENAME_OPENED is non-null, set it to a newly allocated string naming
644 the actual file opened (this string will always start with a "/"). We
645 have to take special pains to avoid doubling the "/" between the directory
646 and the file, sigh! Emacs gets confuzzed by this when we print the
649 If a file is found, return the descriptor.
650 Otherwise, return -1, with errno set for the last name we tried to open. */
652 /* >>>> This should only allow files of certain types,
653 >>>> eg executable, non-directory */
655 openp (const char *path
, int opts
, const char *string
,
657 char **filename_opened
)
671 if ((opts
& OPF_TRY_CWD_FIRST
) || IS_ABSOLUTE_PATH (string
))
675 if (is_regular_file (string
))
677 filename
= alloca (strlen (string
) + 1);
678 strcpy (filename
, string
);
679 fd
= open (filename
, mode
, prot
);
689 if (!(opts
& OPF_SEARCH_IN_PATH
))
690 for (i
= 0; string
[i
]; i
++)
691 if (IS_DIR_SEPARATOR (string
[i
]))
695 /* /foo => foo, to avoid multiple slashes that Emacs doesn't like. */
696 while (IS_DIR_SEPARATOR(string
[0]))
700 while (string
[0] == '.' && IS_DIR_SEPARATOR (string
[1]))
703 alloclen
= strlen (path
) + strlen (string
) + 2;
704 filename
= alloca (alloclen
);
706 for (p
= path
; p
; p
= p1
? p1
+ 1 : 0)
708 p1
= strchr (p
, DIRNAME_SEPARATOR
);
714 if (len
== 4 && p
[0] == '$' && p
[1] == 'c'
715 && p
[2] == 'w' && p
[3] == 'd')
717 /* Name is $cwd -- insert current directory name instead. */
720 /* First, realloc the filename buffer if too short. */
721 len
= strlen (current_directory
);
722 newlen
= len
+ strlen (string
) + 2;
723 if (newlen
> alloclen
)
726 filename
= alloca (alloclen
);
728 strcpy (filename
, current_directory
);
732 /* Normal file name in path -- just use it. */
733 strncpy (filename
, p
, len
);
737 /* Remove trailing slashes */
738 while (len
> 0 && IS_DIR_SEPARATOR (filename
[len
- 1]))
741 strcat (filename
+ len
, SLASH_STRING
);
742 strcat (filename
, string
);
744 if (is_regular_file (filename
))
746 fd
= open (filename
, mode
);
755 /* If a file was opened, canonicalize its filename. Use xfullpath
756 rather than gdb_realpath to avoid resolving the basename part
757 of filenames when the associated file is a symbolic link. This
758 fixes a potential inconsistency between the filenames known to
759 GDB and the filenames it prints in the annotations. */
761 *filename_opened
= NULL
;
762 else if (IS_ABSOLUTE_PATH (filename
))
763 *filename_opened
= xfullpath (filename
);
766 /* Beware the // my son, the Emacs barfs, the botch that catch... */
768 char *f
= concat (current_directory
,
769 IS_DIR_SEPARATOR (current_directory
[strlen (current_directory
) - 1])
771 filename
, (char *)NULL
);
772 *filename_opened
= xfullpath (f
);
781 /* This is essentially a convenience, for clients that want the behaviour
782 of openp, using source_path, but that really don't want the file to be
783 opened but want instead just to know what the full pathname is (as
784 qualified against source_path).
786 The current working directory is searched first.
788 If the file was found, this function returns 1, and FULL_PATHNAME is
789 set to the fully-qualified pathname.
791 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
, OPF_TRY_CWD_FIRST
| OPF_SEARCH_IN_PATH
, filename
,
798 O_RDONLY
, 0, full_pathname
);
801 *full_pathname
= NULL
;
809 /* This function is capable of finding the absolute path to a
810 source file, and opening it, provided you give it an
811 OBJFILE and FILENAME. Both the DIRNAME and FULLNAME are only
812 added suggestions on where to find the file.
814 OBJFILE should be the objfile associated with a psymtab or symtab.
815 FILENAME should be the filename to open.
816 DIRNAME is the compilation directory of a particular source file.
817 Only some debug formats provide this info.
818 FULLNAME can be the last known absolute path to the file in question.
821 A valid file descriptor is returned. ( the return value is positive )
822 FULLNAME is set to the absolute path to the file just opened.
825 A non valid file descriptor is returned. ( the return value is negitive )
826 FULLNAME is set to NULL. */
828 find_and_open_source (struct objfile
*objfile
,
829 const char *filename
,
833 char *path
= source_path
;
837 /* Quick way out if we already know its full name */
840 result
= open (*fullname
, OPEN_MODE
);
843 /* Didn't work -- free old one, try again. */
850 /* Replace a path entry of $cdir with the compilation directory name */
852 /* We cast strstr's result in case an ANSIhole has made it const,
853 which produces a "required warning" when assigned to a nonconst. */
854 p
= (char *) strstr (source_path
, "$cdir");
855 if (p
&& (p
== path
|| p
[-1] == DIRNAME_SEPARATOR
)
856 && (p
[cdir_len
] == DIRNAME_SEPARATOR
|| p
[cdir_len
] == '\0'))
861 alloca (strlen (source_path
) + 1 + strlen (dirname
) + 1);
862 len
= p
- source_path
;
863 strncpy (path
, source_path
, len
); /* Before $cdir */
864 strcpy (path
+ len
, dirname
); /* new stuff */
865 strcat (path
+ len
, source_path
+ len
+ cdir_len
); /* After $cdir */
869 result
= openp (path
, OPF_SEARCH_IN_PATH
, filename
, OPEN_MODE
, 0, fullname
);
872 /* Didn't work. Try using just the basename. */
873 p
= lbasename (filename
);
875 result
= openp (path
, OPF_SEARCH_IN_PATH
, p
, OPEN_MODE
, 0, fullname
);
881 tmp_fullname
= *fullname
;
882 *fullname
= xstrdup (tmp_fullname
);
883 xfree (tmp_fullname
);
888 /* Open a source file given a symtab S. Returns a file descriptor or
889 negative number for error.
891 This function is a convience function to find_and_open_source. */
894 open_source_file (struct symtab
*s
)
899 return find_and_open_source (s
->objfile
, s
->filename
, s
->dirname
,
903 /* Finds the fullname that a symtab represents.
905 If this functions finds the fullname, it will save it in ps->fullname
906 and it will also return the value.
908 If this function fails to find the file that this symtab represents,
909 NULL will be returned and ps->fullname will be set to NULL. */
911 symtab_to_fullname (struct symtab
*s
)
918 /* Don't check s->fullname here, the file could have been
919 deleted/moved/..., look for it again */
920 r
= find_and_open_source (s
->objfile
, s
->filename
, s
->dirname
,
932 /* Finds the fullname that a partial_symtab represents.
934 If this functions finds the fullname, it will save it in ps->fullname
935 and it will also return the value.
937 If this function fails to find the file that this partial_symtab represents,
938 NULL will be returned and ps->fullname will be set to NULL. */
940 psymtab_to_fullname (struct partial_symtab
*ps
)
947 /* Don't check ps->fullname here, the file could have been
948 deleted/moved/..., look for it again */
949 r
= find_and_open_source (ps
->objfile
, ps
->filename
, ps
->dirname
,
961 /* Create and initialize the table S->line_charpos that records
962 the positions of the lines in the source file, which is assumed
963 to be open on descriptor DESC.
964 All set S->nlines to the number of such lines. */
967 find_source_lines (struct symtab
*s
, int desc
)
970 char *data
, *p
, *end
;
972 int lines_allocated
= 1000;
977 line_charpos
= (int *) xmalloc (lines_allocated
* sizeof (int));
978 if (fstat (desc
, &st
) < 0)
979 perror_with_name (s
->filename
);
981 if (s
&& s
->objfile
&& s
->objfile
->obfd
)
982 mtime
= bfd_get_mtime (s
->objfile
->obfd
);
984 mtime
= bfd_get_mtime (exec_bfd
);
986 if (mtime
&& mtime
< st
.st_mtime
)
987 warning (_("Source file is more recent than executable."));
989 #ifdef LSEEK_NOT_LINEAR
993 /* Have to read it byte by byte to find out where the chars live */
995 line_charpos
[0] = lseek (desc
, 0, SEEK_CUR
);
997 while (myread (desc
, &c
, 1) > 0)
1001 if (nlines
== lines_allocated
)
1003 lines_allocated
*= 2;
1005 (int *) xrealloc ((char *) line_charpos
,
1006 sizeof (int) * lines_allocated
);
1008 line_charpos
[nlines
++] = lseek (desc
, 0, SEEK_CUR
);
1012 #else /* lseek linear. */
1014 struct cleanup
*old_cleanups
;
1016 /* st_size might be a large type, but we only support source files whose
1017 size fits in an int. */
1018 size
= (int) st
.st_size
;
1020 /* Use malloc, not alloca, because this may be pretty large, and we may
1021 run into various kinds of limits on stack size. */
1022 data
= (char *) xmalloc (size
);
1023 old_cleanups
= make_cleanup (xfree
, data
);
1025 /* Reassign `size' to result of read for systems where \r\n -> \n. */
1026 size
= myread (desc
, data
, size
);
1028 perror_with_name (s
->filename
);
1031 line_charpos
[0] = 0;
1036 /* A newline at the end does not start a new line. */
1039 if (nlines
== lines_allocated
)
1041 lines_allocated
*= 2;
1043 (int *) xrealloc ((char *) line_charpos
,
1044 sizeof (int) * lines_allocated
);
1046 line_charpos
[nlines
++] = p
- data
;
1049 do_cleanups (old_cleanups
);
1051 #endif /* lseek linear. */
1054 (int *) xrealloc ((char *) line_charpos
, nlines
* sizeof (int));
1058 /* Return the character position of a line LINE in symtab S.
1059 Return 0 if anything is invalid. */
1061 #if 0 /* Currently unused */
1064 source_line_charpos (struct symtab
*s
, int line
)
1068 if (!s
->line_charpos
|| line
<= 0)
1070 if (line
> s
->nlines
)
1072 return s
->line_charpos
[line
- 1];
1075 /* Return the line number of character position POS in symtab S. */
1078 source_charpos_line (struct symtab
*s
, int chr
)
1083 if (s
== 0 || s
->line_charpos
== 0)
1085 lnp
= s
->line_charpos
;
1086 /* Files are usually short, so sequential search is Ok */
1087 while (line
< s
->nlines
&& *lnp
<= chr
)
1092 if (line
>= s
->nlines
)
1100 /* Get full pathname and line number positions for a symtab.
1101 Return nonzero if line numbers may have changed.
1102 Set *FULLNAME to actual name of the file as found by `openp',
1103 or to 0 if the file is not found. */
1106 get_filename_and_charpos (struct symtab
*s
, char **fullname
)
1108 int desc
, linenums_changed
= 0;
1110 desc
= open_source_file (s
);
1118 *fullname
= s
->fullname
;
1119 if (s
->line_charpos
== 0)
1120 linenums_changed
= 1;
1121 if (linenums_changed
)
1122 find_source_lines (s
, desc
);
1124 return linenums_changed
;
1127 /* Print text describing the full name of the source file S
1128 and the line number LINE and its corresponding character position.
1129 The text starts with two Ctrl-z so that the Emacs-GDB interface
1132 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
1134 Return 1 if successful, 0 if could not find the file. */
1137 identify_source_line (struct symtab
*s
, int line
, int mid_statement
,
1140 if (s
->line_charpos
== 0)
1141 get_filename_and_charpos (s
, (char **) NULL
);
1142 if (s
->fullname
== 0)
1144 if (line
> s
->nlines
)
1145 /* Don't index off the end of the line_charpos array. */
1147 annotate_source (s
->fullname
, line
, s
->line_charpos
[line
- 1],
1150 current_source_line
= line
;
1151 first_line_listed
= line
;
1152 last_line_listed
= line
;
1153 current_source_symtab
= s
;
1158 /* Print source lines from the file of symtab S,
1159 starting with line number LINE and stopping before line number STOPLINE. */
1161 static void print_source_lines_base (struct symtab
*s
, int line
, int stopline
,
1164 print_source_lines_base (struct symtab
*s
, int line
, int stopline
, int noerror
)
1169 int nlines
= stopline
- line
;
1171 /* Regardless of whether we can open the file, set current_source_symtab. */
1172 current_source_symtab
= s
;
1173 current_source_line
= line
;
1174 first_line_listed
= line
;
1176 /* If printing of source lines is disabled, just print file and line number */
1177 if (ui_out_test_flags (uiout
, ui_source_list
))
1179 /* Only prints "No such file or directory" once */
1180 if ((s
!= last_source_visited
) || (!last_source_error
))
1182 last_source_visited
= s
;
1183 desc
= open_source_file (s
);
1187 desc
= last_source_error
;
1199 last_source_error
= desc
;
1203 char *name
= alloca (strlen (s
->filename
) + 100);
1204 sprintf (name
, "%d\t%s", line
, s
->filename
);
1205 print_sys_errmsg (name
, errno
);
1208 ui_out_field_int (uiout
, "line", line
);
1209 ui_out_text (uiout
, "\tin ");
1210 ui_out_field_string (uiout
, "file", s
->filename
);
1211 ui_out_text (uiout
, "\n");
1216 last_source_error
= 0;
1218 if (s
->line_charpos
== 0)
1219 find_source_lines (s
, desc
);
1221 if (line
< 1 || line
> s
->nlines
)
1224 error (_("Line number %d out of range; %s has %d lines."),
1225 line
, s
->filename
, s
->nlines
);
1228 if (lseek (desc
, s
->line_charpos
[line
- 1], 0) < 0)
1231 perror_with_name (s
->filename
);
1234 stream
= fdopen (desc
, FDOPEN_MODE
);
1237 while (nlines
-- > 0)
1244 last_line_listed
= current_source_line
;
1245 sprintf (buf
, "%d\t", current_source_line
++);
1246 ui_out_text (uiout
, buf
);
1249 if (c
< 040 && c
!= '\t' && c
!= '\n' && c
!= '\r')
1251 sprintf (buf
, "^%c", c
+ 0100);
1252 ui_out_text (uiout
, buf
);
1255 ui_out_text (uiout
, "^?");
1258 /* Skip a \r character, but only before a \n. */
1259 int c1
= fgetc (stream
);
1262 printf_filtered ("^%c", c
+ 0100);
1264 ungetc (c1
, stream
);
1268 sprintf (buf
, "%c", c
);
1269 ui_out_text (uiout
, buf
);
1272 while (c
!= '\n' && (c
= fgetc (stream
)) >= 0);
1278 /* Show source lines from the file of symtab S, starting with line
1279 number LINE and stopping before line number STOPLINE. If this is the
1280 not the command line version, then the source is shown in the source
1281 window otherwise it is simply printed */
1284 print_source_lines (struct symtab
*s
, int line
, int stopline
, int noerror
)
1286 print_source_lines_base (s
, line
, stopline
, noerror
);
1289 /* Print info on range of pc's in a specified line. */
1292 line_info (char *arg
, int from_tty
)
1294 struct symtabs_and_lines sals
;
1295 struct symtab_and_line sal
;
1296 CORE_ADDR start_pc
, end_pc
;
1299 init_sal (&sal
); /* initialize to zeroes */
1303 sal
.symtab
= current_source_symtab
;
1304 sal
.line
= last_line_listed
;
1306 sals
.sals
= (struct symtab_and_line
*)
1307 xmalloc (sizeof (struct symtab_and_line
));
1312 sals
= decode_line_spec_1 (arg
, 0);
1317 /* C++ More than one line may have been specified, as when the user
1318 specifies an overloaded function name. Print info on them all. */
1319 for (i
= 0; i
< sals
.nelts
; i
++)
1323 if (sal
.symtab
== 0)
1325 printf_filtered (_("No line number information available"));
1328 /* This is useful for "info line *0x7f34". If we can't tell the
1329 user about a source line, at least let them have the symbolic
1331 printf_filtered (" for address ");
1333 print_address (sal
.pc
, gdb_stdout
);
1336 printf_filtered (".");
1337 printf_filtered ("\n");
1339 else if (sal
.line
> 0
1340 && find_line_pc_range (sal
, &start_pc
, &end_pc
))
1342 if (start_pc
== end_pc
)
1344 printf_filtered ("Line %d of \"%s\"",
1345 sal
.line
, sal
.symtab
->filename
);
1347 printf_filtered (" is at address ");
1348 print_address (start_pc
, gdb_stdout
);
1350 printf_filtered (" but contains no code.\n");
1354 printf_filtered ("Line %d of \"%s\"",
1355 sal
.line
, sal
.symtab
->filename
);
1357 printf_filtered (" starts at address ");
1358 print_address (start_pc
, gdb_stdout
);
1360 printf_filtered (" and ends at ");
1361 print_address (end_pc
, gdb_stdout
);
1362 printf_filtered (".\n");
1365 /* x/i should display this line's code. */
1366 set_next_address (start_pc
);
1368 /* Repeating "info line" should do the following line. */
1369 last_line_listed
= sal
.line
+ 1;
1371 /* If this is the only line, show the source code. If it could
1372 not find the file, don't do anything special. */
1373 if (annotation_level
&& sals
.nelts
== 1)
1374 identify_source_line (sal
.symtab
, sal
.line
, 0, start_pc
);
1377 /* Is there any case in which we get here, and have an address
1378 which the user would want to see? If we have debugging symbols
1379 and no line numbers? */
1380 printf_filtered (_("Line number %d is out of range for \"%s\".\n"),
1381 sal
.line
, sal
.symtab
->filename
);
1386 /* Commands to search the source file for a regexp. */
1389 forward_search_command (char *regex
, int from_tty
)
1397 line
= last_line_listed
+ 1;
1399 msg
= (char *) re_comp (regex
);
1401 error (("%s"), msg
);
1403 if (current_source_symtab
== 0)
1404 select_source_symtab (0);
1406 desc
= open_source_file (current_source_symtab
);
1408 perror_with_name (current_source_symtab
->filename
);
1410 if (current_source_symtab
->line_charpos
== 0)
1411 find_source_lines (current_source_symtab
, desc
);
1413 if (line
< 1 || line
> current_source_symtab
->nlines
)
1416 error (_("Expression not found"));
1419 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1422 perror_with_name (current_source_symtab
->filename
);
1425 stream
= fdopen (desc
, FDOPEN_MODE
);
1429 static char *buf
= NULL
;
1431 int cursize
, newsize
;
1434 buf
= xmalloc (cursize
);
1443 if (p
- buf
== cursize
)
1445 newsize
= cursize
+ cursize
/ 2;
1446 buf
= xrealloc (buf
, newsize
);
1451 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1453 /* Remove the \r, if any, at the end of the line, otherwise
1454 regular expressions that end with $ or \n won't work. */
1455 if (p
- buf
> 1 && p
[-2] == '\r')
1461 /* we now have a source line in buf, null terminate and match */
1463 if (re_exec (buf
) > 0)
1467 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1468 set_internalvar (lookup_internalvar ("_"),
1469 value_from_longest (builtin_type_int
,
1471 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1477 printf_filtered (_("Expression not found\n"));
1482 reverse_search_command (char *regex
, int from_tty
)
1490 line
= last_line_listed
- 1;
1492 msg
= (char *) re_comp (regex
);
1494 error (("%s"), msg
);
1496 if (current_source_symtab
== 0)
1497 select_source_symtab (0);
1499 desc
= open_source_file (current_source_symtab
);
1501 perror_with_name (current_source_symtab
->filename
);
1503 if (current_source_symtab
->line_charpos
== 0)
1504 find_source_lines (current_source_symtab
, desc
);
1506 if (line
< 1 || line
> current_source_symtab
->nlines
)
1509 error (_("Expression not found"));
1512 if (lseek (desc
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1515 perror_with_name (current_source_symtab
->filename
);
1518 stream
= fdopen (desc
, FDOPEN_MODE
);
1522 /* FIXME!!! We walk right off the end of buf if we get a long line!!! */
1523 char buf
[4096]; /* Should be reasonable??? */
1533 while (c
!= '\n' && (c
= getc (stream
)) >= 0);
1535 /* Remove the \r, if any, at the end of the line, otherwise
1536 regular expressions that end with $ or \n won't work. */
1537 if (p
- buf
> 1 && p
[-2] == '\r')
1543 /* We now have a source line in buf; null terminate and match. */
1545 if (re_exec (buf
) > 0)
1549 print_source_lines (current_source_symtab
, line
, line
+ 1, 0);
1550 set_internalvar (lookup_internalvar ("_"),
1551 value_from_longest (builtin_type_int
,
1553 current_source_line
= max (line
- lines_to_list
/ 2, 1);
1557 if (fseek (stream
, current_source_symtab
->line_charpos
[line
- 1], 0) < 0)
1560 perror_with_name (current_source_symtab
->filename
);
1564 printf_filtered (_("Expression not found\n"));
1570 _initialize_source (void)
1572 struct cmd_list_element
*c
;
1573 current_source_symtab
= 0;
1574 init_source_path ();
1576 /* The intention is to use POSIX Basic Regular Expressions.
1577 Always use the GNU regex routine for consistency across all hosts.
1578 Our current GNU regex.c does not have all the POSIX features, so this is
1579 just an approximation. */
1580 re_set_syntax (RE_SYNTAX_GREP
);
1582 c
= add_cmd ("directory", class_files
, directory_command
, _("\
1583 Add directory DIR to beginning of search path for source files.\n\
1584 Forget cached info on source file locations and line positions.\n\
1585 DIR can also be $cwd for the current working directory, or $cdir for the\n\
1586 directory in which the source file was compiled into object code.\n\
1587 With no argument, reset the search path to $cdir:$cwd, the default."),
1591 add_com_alias ("use", "directory", class_files
, 0);
1593 set_cmd_completer (c
, filename_completer
);
1595 add_cmd ("directories", no_class
, show_directories
, _("\
1596 Current search path for finding source files.\n\
1597 $cwd in the path means the current working directory.\n\
1598 $cdir in the path means the compilation directory of the source file."),
1603 add_com_alias ("D", "directory", class_files
, 0);
1604 add_cmd ("ld", no_class
, show_directories
, _("\
1605 Current search path for finding source files.\n\
1606 $cwd in the path means the current working directory.\n\
1607 $cdir in the path means the compilation directory of the source file."),
1611 add_info ("source", source_info
,
1612 _("Information about the current source file."));
1614 add_info ("line", line_info
, _("\
1615 Core addresses of the code for a source line.\n\
1616 Line can be specified as\n\
1617 LINENUM, to list around that line in current file,\n\
1618 FILE:LINENUM, to list around that line in that file,\n\
1619 FUNCTION, to list around beginning of that function,\n\
1620 FILE:FUNCTION, to distinguish among like-named static functions.\n\
1621 Default is to describe the last source line that was listed.\n\n\
1622 This sets the default address for \"x\" to the line's first instruction\n\
1623 so that \"x/i\" suffices to start examining the machine code.\n\
1624 The address is also stored as the value of \"$_\"."));
1626 add_com ("forward-search", class_files
, forward_search_command
, _("\
1627 Search for regular expression (see regex(3)) from last line listed.\n\
1628 The matching line number is also stored as the value of \"$_\"."));
1629 add_com_alias ("search", "forward-search", class_files
, 0);
1631 add_com ("reverse-search", class_files
, reverse_search_command
, _("\
1632 Search backward for regular expression (see regex(3)) from last line listed.\n\
1633 The matching line number is also stored as the value of \"$_\"."));
1637 add_com_alias ("/", "forward-search", class_files
, 0);
1638 add_com_alias ("?", "reverse-search", class_files
, 0);
1641 add_setshow_integer_cmd ("listsize", class_support
, &lines_to_list
, _("\
1642 Set number of source lines gdb will list by default."), _("\
1643 Show number of source lines gdb will list by default."), NULL
,
1646 &setlist
, &showlist
);
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