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2004-03-25 Thomas Pfaff <tpfaff@gmx.net>

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* libc/stdio/fclose.c (fclose): Protect file pointer list when
        releasing a file.
         * libc/stdio/fcloseall.c (_fcloseall_r): Close all files via
        fwalk.
        * libc/stdio/fdopen.c (_fdopen_r): Add calls to
        _flockfile/_funlockfile.
        * libc/stdio/findfp.c: Move __sfp_lock. Change __sfp_lock type
        to recursive.
        Change __lock_acquire/__lock_release calls for __sfp_lock to
        __sfp_lock_acquire/__sfp_lock_release throughout.
        (std): Make sure that file lock is only initialized once.
        (__sfp): Move _file initialization. Initialize file lock.
        (__sfp_lock_acquire): New function.
        (__sfp_lock_release): Ditto.
        (__fp_lock_all): Remove __sfp_lock_acquire call.
        (__fp_unlock_all): Remove __sfp_lock_release call.
        * libc/stdio/fopen.c (_fopen_r): Protect file pointer list.
        Add calls to _flockfile/_funlockfile. Remove
        __lock_init_recursive call.
        * libc/stdio/freopen.c (_freopen_r): Protect file pointer list.
        * libc/stdio/fwalk.c (__fwalk): New static function.
        (_fwalk): Protect file pointer list. Use __fwalk to walk through
        file pointers.
        * libc/stdio/local.h: Add defines for
        __sfp_lock_acquire/__sfp_lock_release when
        single threaded. Add function prototypes otherwise.
        * libc/stdio64/fdopen64.c (_fdopen64_r): Add calls to
        _flockfile/_funlockfile.
        * libc/stdio/fopen64.c (_fopen64_r): Protect file pointer list.
        Add calls to _flockfile/_funlockfile. Remove
         __lock_init_recursive call.
        * libc/stdio/freopen64.c (_freopen64_r): Protect file pointer
        list.
This commit is contained in:
Jeff Johnston 2004-03-25 22:29:18 +00:00
parent 4ee0dce2d7
commit 10dcf7e718
12 changed files with 147 additions and 56 deletions
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36
newlib/ChangeLog
View File

@ -1,3 +1,39 @@
2004-03-25 Thomas Pfaff <tpfaff@gmx.net>
* libc/stdio/fclose.c (fclose): Protect file pointer list when
releasing a file.
* libc/stdio/fcloseall.c (_fcloseall_r): Close all files via
fwalk.
* libc/stdio/fdopen.c (_fdopen_r): Add calls to
_flockfile/_funlockfile.
* libc/stdio/findfp.c: Move __sfp_lock. Change __sfp_lock type
to recursive.
Change __lock_acquire/__lock_release calls for __sfp_lock to
__sfp_lock_acquire/__sfp_lock_release throughout.
(std): Make sure that file lock is only initialized once.
(__sfp): Move _file initialization. Initialize file lock.
(__sfp_lock_acquire): New function.
(__sfp_lock_release): Ditto.
(__fp_lock_all): Remove __sfp_lock_acquire call.
(__fp_unlock_all): Remove __sfp_lock_release call.
* libc/stdio/fopen.c (_fopen_r): Protect file pointer list.
Add calls to _flockfile/_funlockfile. Remove
__lock_init_recursive call.
* libc/stdio/freopen.c (_freopen_r): Protect file pointer list.
* libc/stdio/fwalk.c (__fwalk): New static function.
(_fwalk): Protect file pointer list. Use __fwalk to walk through
file pointers.
* libc/stdio/local.h: Add defines for
__sfp_lock_acquire/__sfp_lock_release when
single threaded. Add function prototypes otherwise.
* libc/stdio64/fdopen64.c (_fdopen64_r): Add calls to
_flockfile/_funlockfile.
* libc/stdio/fopen64.c (_fopen64_r): Protect file pointer list.
Add calls to _flockfile/_funlockfile. Remove
__lock_init_recursive call.
* libc/stdio/freopen64.c (_freopen64_r): Protect file pointer
list.
2004-03-25 Jeff Johnston <jjohnstn@redhat.com>
* libc/sys/linux/sys/lock.h: Turn on __USE_GNU flag if not already

7
newlib/libc/stdio/fclose.c
View File

@ -65,6 +65,8 @@ _DEFUN (fclose, (fp),
if (fp == NULL)
return (0); /* on NULL */
__sfp_lock_acquire ();
_flockfile(fp);
CHECK_INIT (fp);
@ -72,6 +74,7 @@ _DEFUN (fclose, (fp),
if (fp->_flags == 0) /* not open! */
{
_funlockfile(fp);
__sfp_lock_release ();
return (0);
}
r = fp->_flags & __SWR ? fflush (fp) : 0;
@ -83,11 +86,13 @@ _DEFUN (fclose, (fp),
FREEUB (fp);
if (HASLB (fp))
FREELB (fp);
fp->_flags = 0; /* release this FILE for reuse */
_funlockfile(fp);
#ifndef __SINGLE_THREAD__
__lock_close_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
#endif
fp->_flags = 0; /* release this FILE for reuse */
__sfp_lock_release ();
return (r);
}

10
newlib/libc/stdio/fcloseall.c
View File

@ -66,15 +66,7 @@ int
_fcloseall_r (ptr)
struct _reent *ptr;
{
register FILE *fp;
register int n, ret = 0;
register struct _glue *g;
for (g = &ptr->__sglue; g != NULL; g = g->_next)
for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++)
if (fp->_flags != 0)
ret |= fclose (fp);
return ret;
return _fwalk (ptr, fclose);
}
#ifndef _REENT_ONLY

4
newlib/libc/stdio/fdopen.c
View File

@ -76,6 +76,9 @@ _DEFUN (_fdopen_r, (ptr, fd, mode),
if ((fp = __sfp (ptr)) == 0)
return 0;
_flockfile(fp);
fp->_flags = flags;
/*
* If opened for appending, but underlying descriptor
@ -111,6 +114,7 @@ _DEFUN (_fdopen_r, (ptr, fd, mode),
fp->_flags |= __SCLE;
#endif
_funlockfile(fp);
return fp;
}

42
newlib/libc/stdio/findfp.c
View File

@ -25,10 +25,6 @@
#include <sys/lock.h>
#include "local.h"
#ifndef __SINGLE_THREAD__
__LOCK_INIT(static, __sfp_lock);
#endif
static void
std (ptr, flags, file, data)
FILE *ptr;
@ -49,8 +45,12 @@ std (ptr, flags, file, data)
ptr->_write = __swrite;
ptr->_seek = __sseek;
ptr->_close = __sclose;
#ifndef __SINGLE_THREAD__
#if !defined(__SINGLE_THREAD__) && !defined(_REENT_SMALL)
__lock_init_recursive (*(_LOCK_RECURSIVE_T *)&ptr->_lock);
/*
* #else
* lock is already initialized in __sfp
*/
#endif
#ifdef __SCLE
@ -90,9 +90,7 @@ __sfp (d)
int n;
struct _glue *g;
#ifndef __SINGLE_THREAD__
__lock_acquire(__sfp_lock);
#endif
__sfp_lock_acquire ();
if (!_GLOBAL_REENT->__sdidinit)
__sinit (_GLOBAL_REENT);
@ -105,24 +103,24 @@ __sfp (d)
(g->_next = __sfmoreglue (d, NDYNAMIC)) == NULL)
break;
}
#ifndef __SINGLE_THREAD__
__lock_release(__sfp_lock);
#endif
__sfp_lock_release ();
d->_errno = ENOMEM;
return NULL;
found:
fp->_file = -1; /* no file */
fp->_flags = 1; /* reserve this slot; caller sets real flags */
#ifndef __SINGLE_THREAD__
__lock_release(__sfp_lock);
__lock_init_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
#endif
__sfp_lock_release ();
fp->_p = NULL; /* no current pointer */
fp->_w = 0; /* nothing to read or write */
fp->_r = 0;
fp->_bf._base = NULL; /* no buffer */
fp->_bf._size = 0;
fp->_lbfsize = 0; /* not line buffered */
fp->_file = -1; /* no file */
/* fp->_cookie = <any>; */ /* caller sets cookie, _read/_write etc */
fp->_ub._base = NULL; /* no ungetc buffer */
fp->_ub._size = 0;
@ -197,6 +195,20 @@ __sinit (s)
#ifndef __SINGLE_THREAD__
__LOCK_INIT_RECURSIVE(static, __sfp_lock);
void
__sfp_lock_acquire ()
{
__lock_acquire(__sfp_lock);
}
void
__sfp_lock_release ()
{
__lock_release(__sfp_lock);
}
/* Walkable file locking routine. */
static int
__fp_lock (ptr)
@ -220,8 +232,6 @@ __fp_unlock (ptr)
void
__fp_lock_all ()
{
__lock_acquire(__sfp_lock);
(void) _fwalk (_REENT, __fp_lock);
}
@ -229,7 +239,5 @@ void
__fp_unlock_all ()
{
(void) _fwalk (_REENT, __fp_unlock);
__lock_release(__sfp_lock);
}
#endif

12
newlib/libc/stdio/fopen.c
View File

@ -138,10 +138,17 @@ _DEFUN (_fopen_r, (ptr, file, mode),
if ((f = _open_r (ptr, file, oflags, 0666)) < 0)
{
__sfp_lock_acquire ();
fp->_flags = 0; /* release */
#ifndef __SINGLE_THREAD__
__lock_close_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
#endif
__sfp_lock_release ();
return NULL;
}
_flockfile(fp);
fp->_file = f;
fp->_flags = flags;
fp->_cookie = (_PTR) fp;
@ -158,10 +165,7 @@ _DEFUN (_fopen_r, (ptr, file, mode),
fp->_flags |= __SCLE;
#endif
#ifndef __SINGLE_THREAD__
__lock_init_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
#endif
_funlockfile(fp);
return fp;
}

9
newlib/libc/stdio/freopen.c
View File

@ -87,14 +87,17 @@ _DEFUN (_freopen_r, (ptr, file, mode, fp),
register int f;
int flags, oflags, e;
__sfp_lock_acquire ();
_flockfile(fp);
CHECK_INIT (fp);
if ((flags = __sflags (ptr, mode, &oflags)) == 0)
{
(void) fclose (fp);
_funlockfile(fp);
(void) fclose (fp);
__sfp_lock_release ();
return NULL;
}
@ -148,12 +151,13 @@ _DEFUN (_freopen_r, (ptr, file, mode, fp),
if (f < 0)
{ /* did not get it after all */
fp->_flags = 0; /* set it free */
ptr->_errno = e; /* restore in case _close clobbered */
_funlockfile(fp);
#ifndef __SINGLE_THREAD__
__lock_close_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
#endif
fp->_flags = 0; /* set it free */
__sfp_lock_release ();
return NULL;
}
@ -171,6 +175,7 @@ _DEFUN (_freopen_r, (ptr, file, mode, fp),
#endif
_funlockfile(fp);
__sfp_lock_release ();
return fp;
}

44
newlib/libc/stdio/fwalk.c
View File

@ -26,8 +26,8 @@ static char sccsid[] = "%W% (Berkeley) %G%";
#include <errno.h>
#include "local.h"
int
_fwalk (ptr, function)
static int
__fwalk (ptr, function)
struct _reent *ptr;
register int (*function) ();
{
@ -35,20 +35,36 @@ _fwalk (ptr, function)
register int n, ret = 0;
register struct _glue *g;
/* Must traverse given list for std streams. */
if (ptr != _GLOBAL_REENT)
{
for (g = &ptr->__sglue; g != NULL; g = g->_next)
for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++)
if (fp->_flags != 0)
ret |= (*function) (fp);
}
/* Must traverse global list for all other streams. */
for (g = &_GLOBAL_REENT->__sglue; g != NULL; g = g->_next)
for (g = &ptr->__sglue; g != NULL; g = g->_next)
for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++)
if (fp->_flags != 0)
ret |= (*function) (fp);
{
_flockfile (fp);
if (fp->_flags != 0 && fp->_file != -1)
ret |= (*function) (fp);
_funlockfile (fp);
}
return ret;
}
int
_fwalk (ptr, function)
struct _reent *ptr;
register int (*function) ();
{
register int ret = 0;
__sfp_lock_acquire ();
/* Must traverse given list for std streams. */
if (ptr != _GLOBAL_REENT)
ret |= __fwalk (ptr, function);
/* Must traverse global list for all other streams. */
ret |= __fwalk (_GLOBAL_REENT, function);
__sfp_lock_release ();
return ret;
}

8
newlib/libc/stdio/local.h
View File

@ -87,3 +87,11 @@ char *_EXFUN(_llicvt,(char *, long long, char));
#define CVT_BUF_SIZE 128
#define NDYNAMIC 4 /* add four more whenever necessary */
#ifdef __SINGLE_THREAD__
#define __sfp_lock_acquire()
#define __sfp_lock_release()
#else
void _EXFUN(__sfp_lock_acquire,(void));
void _EXFUN(__sfp_lock_release,(void));
#endif

8
newlib/libc/stdio64/fdopen64.c
View File

@ -63,6 +63,9 @@ _DEFUN (_fdopen64_r, (ptr, fd, mode),
if ((fp = __sfp (ptr)) == 0)
return 0;
_flockfile(fp);
fp->_flags = flags;
/*
* If opened for appending, but underlying descriptor
@ -99,12 +102,9 @@ _DEFUN (_fdopen64_r, (ptr, fd, mode),
fp->_flags |= __SCLE;
#endif
#ifndef __SINGLE_THREAD__
__lock_init_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
#endif
fp->_flags |= __SL64;
_funlockfile(fp);
return fp;
}

12
newlib/libc/stdio64/fopen64.c
View File

@ -91,10 +91,17 @@ _DEFUN (_fopen64_r, (ptr, file, mode),
if ((f = _open64_r (ptr, file, oflags, 0666)) < 0)
{
__sfp_lock_acquire ();
fp->_flags = 0; /* release */
#ifndef __SINGLE_THREAD__
__lock_close_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
#endif
__sfp_lock_release ();
return NULL;
}
_flockfile(fp);
fp->_file = f;
fp->_flags = flags;
fp->_cookie = (_PTR) fp;
@ -114,10 +121,7 @@ _DEFUN (_fopen64_r, (ptr, file, mode),
fp->_flags |= __SL64;
#ifndef __SINGLE_THREAD__
__lock_init_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
#endif
_funlockfile(fp);
return fp;
}

11
newlib/libc/stdio64/freopen64.c
View File

@ -70,6 +70,7 @@ Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/lock.h>
#include "local64.h"
/*
@ -88,14 +89,17 @@ _DEFUN (_freopen64_r, (ptr, file, mode, fp),
register int f;
int flags, oflags, e;
__sfp_lock_acquire ();
_flockfile(fp);
CHECK_INIT (fp);
if ((flags = __sflags (ptr, mode, &oflags)) == 0)
{
(void) fclose (fp);
_funlockfile(fp);
(void) fclose (fp);
__sfp_lock_release ();
return NULL;
}
@ -152,6 +156,10 @@ _DEFUN (_freopen64_r, (ptr, file, mode, fp),
fp->_flags = 0; /* set it free */
ptr->_errno = e; /* restore in case _close clobbered */
_funlockfile(fp);
#ifndef __SINGLE_THREAD__
__lock_close_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
#endif
__sfp_lock_release ();
return NULL;
}
@ -172,6 +180,7 @@ _DEFUN (_freopen64_r, (ptr, file, mode, fp),
fp->_flags |= __SL64;
_funlockfile(fp);
__sfp_lock_release ();
return fp;
}