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* rt/Versions (librt): Export __mq_open_2@@GLIBC_2.7.

Browse Source 
* rt/Makefile (headers): Add bits/mqueue2.h.
	* rt/mqueue.h: Include bits/mqueue2.h if -D_FORTIFY_SOURCE=2,
	optimizing with GCC and __va_arg_pack_len is defined.
	* rt/bits/mqueue2.h: New file.
	* rt/mq_open.c (__mq_open): Renamed from mq_open.
	(mq_open): New strong_alias.
	(__mq_open_2): New function.
	* sysdeps/unix/sysv/linux/mq_open.c (__mq_open): Renamed from mq_open.
	(mq_open): New strong_alias.
	(__mq_open_2): New function.
	* debug/Versions (libc): Export __fortify_fail@@GLIBC_PRIVATE.
	* Versions.def (librt): Add GLIBC_2.7 version.
	* debug/fortify_fail.c (__fortify_fail): Add libc_hidden_def.
	* include/stdio.h (__fortify_fail): Add libc_hidden_proto.

	* misc/sys/cdefs.h (__errordecl, __va_arg_pack_len): Define.
	* io/fcntl.h: Include bits/fcntl2.h when __va_arg_pack_len
	is defined rather than when not C++.
	* io/bits/fcntl2.h (__open_alias, __open64_alias, __openat_alias,
	__openat64_alias): New redirects.
	(__open_too_many_args, __open_missing_mode, __open64_too_many_args,
	__open64_missing_mode, __openat_too_many_args, __openat_missing_mode,
	__openat64_too_many_args, __openat64_missing_mode): New __errordecls.
	(open, open64, openat, openat64): Rewrite as __extern_always_inline
	functions instead of function-like macros.
This commit is contained in:
Ulrich Drepper 2007-09-15 22:35:27 +00:00
parent 9bdfff6000
commit 3a50811c2f
14 changed files with 258 additions and 140 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
ChangeLog
View File

@ -1,3 +1,32 @@
2007-09-15 Jakub Jelinek <jakub@redhat.com>
* rt/Versions (librt): Export __mq_open_2@@GLIBC_2.7.
* rt/Makefile (headers): Add bits/mqueue2.h.
* rt/mqueue.h: Include bits/mqueue2.h if -D_FORTIFY_SOURCE=2,
optimizing with GCC and __va_arg_pack_len is defined.
* rt/bits/mqueue2.h: New file.
* rt/mq_open.c (__mq_open): Renamed from mq_open.
(mq_open): New strong_alias.
(__mq_open_2): New function.
* sysdeps/unix/sysv/linux/mq_open.c (__mq_open): Renamed from mq_open.
(mq_open): New strong_alias.
(__mq_open_2): New function.
* debug/Versions (libc): Export __fortify_fail@@GLIBC_PRIVATE.
* Versions.def (librt): Add GLIBC_2.7 version.
* debug/fortify_fail.c (__fortify_fail): Add libc_hidden_def.
* include/stdio.h (__fortify_fail): Add libc_hidden_proto.
* misc/sys/cdefs.h (__errordecl, __va_arg_pack_len): Define.
* io/fcntl.h: Include bits/fcntl2.h when __va_arg_pack_len
is defined rather than when not C++.
* io/bits/fcntl2.h (__open_alias, __open64_alias, __openat_alias,
__openat64_alias): New redirects.
(__open_too_many_args, __open_missing_mode, __open64_too_many_args,
__open64_missing_mode, __openat_too_many_args, __openat_missing_mode,
__openat64_too_many_args, __openat64_missing_mode): New __errordecls.
(open, open64, openat, openat64): Rewrite as __extern_always_inline
functions instead of function-like macros.
2007-09-14 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/i386/i586/memcpy.S (__memcpy_chk): New definition.

1
Versions.def
View File

@ -100,6 +100,7 @@ librt {
GLIBC_2.3.3
GLIBC_2.3.4
GLIBC_2.4
GLIBC_2.7
}
libutil {
GLIBC_2.0

3
debug/Versions
View File

@ -42,4 +42,7 @@ libc {
GLIBC_2.7 {
__fread_chk; __fread_unlocked_chk;
}
GLIBC_PRIVATE {
__fortify_fail;
}
}

1
debug/fortify_fail.c
View File

@ -32,3 +32,4 @@ __fortify_fail (msg)
__libc_message (2, "*** %s ***: %s terminated\n",
msg, __libc_argv[0] ?: "<unknown>");
}
libc_hidden_def (__fortify_fail)

1
include/stdio.h
View File

@ -67,6 +67,7 @@ extern void __libc_fatal (__const char *__message)
__attribute__ ((__noreturn__));
extern void __libc_message (int do_abort, __const char *__fnt, ...);
extern void __fortify_fail (const char *msg) __attribute__ ((noreturn));
libc_hidden_proto (__fortify_fail)
/* Acquire ownership of STREAM. */
extern void __flockfile (FILE *__stream);

248
io/bits/fcntl2.h
View File

@ -25,161 +25,149 @@
appropriate third/fourth parameter. */
#ifndef __USE_FILE_OFFSET64
extern int __open_2 (__const char *__path, int __oflag) __nonnull ((1));
extern int __REDIRECT (__open_alias, (__const char *__path, int __oflag, ...),
open) __nonnull ((1));
#else
extern int __REDIRECT (__open_2, (__const char *__file, int __oflag),
extern int __REDIRECT (__open_2, (__const char *__path, int __oflag),
__open64_2) __nonnull ((1));
extern int __REDIRECT (__open_alias, (__const char *__path, int __oflag, ...),
open64) __nonnull ((1));
#endif
__errordecl (__open_too_many_args,
"open can be called either with 2 or 3 arguments, not more");
__errordecl (__open_missing_mode,
"open with O_CREAT in second argument needs 3 arguments");
#define open(fname, flags, ...) \
(__extension__ \
({ int ___r; \
/* If the compiler complains about an invalid type, excess elements, \
etc. in the initialization this means a parameter of the wrong type \
has been passed to open. */ \
int ___arr[] = { __VA_ARGS__ }; \
if (__builtin_constant_p (flags) && ((flags) & O_CREAT) != 0) \
{ \
/* If the compiler complains about the size of this array type the \
mode parameter is missing since O_CREAT has been used. */ \
typedef int __open_missing_mode[((flags) & O_CREAT) != 0 \
? ((long int) sizeof (___arr) \
- (long int) sizeof (int)) : 1];\
} \
if (sizeof (___arr) == 0) \
{ \
if (__builtin_constant_p (flags) && ((flags) & O_CREAT) == 0) \
___r = open (fname, flags); \
else \
___r = __open_2 (fname, flags); \
} \
else \
{ \
/* If the compiler complains about the size of this array type too \
many parameters have been passed to open. */ \
typedef int __open_too_many_args[-(sizeof (___arr) \
> sizeof (int))]; \
___r = open (fname, flags, ___arr[0]); \
} \
___r; \
}))
__extern_always_inline int
open (__const char *__path, int __oflag, ...)
{
if (__va_arg_pack_len () > 1)
__open_too_many_args ();
if (__builtin_constant_p (__oflag))
{
if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1)
{
__open_missing_mode ();
return __open_2 (__path, __oflag);
}
return __open_alias (__path, __oflag, __va_arg_pack ());
}
if (__va_arg_pack_len () < 1)
return __open_2 (__path, __oflag);
return __open_alias (__path, __oflag, __va_arg_pack ());
}
#ifdef __USE_LARGEFILE64
extern int __open64_2 (__const char *__path, int __oflag) __nonnull ((1));
extern int __REDIRECT (__open64_alias, (__const char *__path, int __oflag,
...), open64) __nonnull ((1));
__errordecl (__open64_too_many_args,
"open64 can be called either with 2 or 3 arguments, not more");
__errordecl (__open64_missing_mode,
"open64 with O_CREAT in second argument needs 3 arguments");
# define open64(fname, flags, ...) \
(__extension__ \
({ int ___r; \
/* If the compiler complains about an invalid type, excess elements, \
etc. in the initialization this means a parameter of the wrong type \
has been passed to open64. */ \
int ___arr[] = { __VA_ARGS__ }; \
if (__builtin_constant_p (flags) && ((flags) & O_CREAT) != 0) \
{ \
/* If the compiler complains about the size of this array type the \
mode parameter is missing since O_CREAT has been used. */ \
typedef int __open_missing_mode[((flags) & O_CREAT) != 0 \
? ((long int) sizeof (___arr) \
- (long int) sizeof (int)) : 1];\
} \
if (sizeof (___arr) == 0) \
{ \
if (__builtin_constant_p (flags) && ((flags) & O_CREAT) == 0) \
___r = open64 (fname, flags); \
else \
___r = __open64_2 (fname, flags); \
} \
else \
{ \
/* If the compiler complains about the size of this array type too \
many parameters have been passed to open64. */ \
typedef int __open_too_many_args[-(sizeof (___arr) \
> sizeof (int))]; \
___r = open64 (fname, flags, ___arr[0]); \
} \
___r; \
}))
__extern_always_inline int
open64 (__const char *__path, int __oflag, ...)
{
if (__va_arg_pack_len () > 1)
__open64_too_many_args ();
if (__builtin_constant_p (__oflag))
{
if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1)
{
__open64_missing_mode ();
return __open64_2 (__path, __oflag);
}
return __open64_alias (__path, __oflag, __va_arg_pack ());
}
if (__va_arg_pack_len () < 1)
return __open64_2 (__path, __oflag);
return __open64_alias (__path, __oflag, __va_arg_pack ());
}
#endif
#ifdef __USE_ATFILE
# ifndef __USE_FILE_OFFSET64
extern int __openat_2 (int __fd, __const char *__path, int __oflag)
__nonnull ((2));
extern int __REDIRECT (__openat_alias, (int __fd, __const char *__path,
int __oflag, ...), openat)
__nonnull ((2));
# else
extern int __REDIRECT (__openat_2, (int __fd, __const char *__file,
extern int __REDIRECT (__openat_2, (int __fd, __const char *__path,
int __oflag), __openat64_2)
__nonnull ((2));
extern int __REDIRECT (__openat_alias, (int __fd, __const char *__path,
int __oflag, ...), openat64)
__nonnull ((2));
# endif
__errordecl (__openat_too_many_args,
"openat can be called either with 3 or 4 arguments, not more");
__errordecl (__openat_missing_mode,
"openat with O_CREAT in third argument needs 4 arguments");
# define openat(fd, fname, flags, ...) \
(__extension__ \
({ int ___r; \
/* If the compiler complains about an invalid type, excess elements, \
etc. in the initialization this means a parameter of the wrong type \
has been passed to openat. */ \
int ___arr[] = { __VA_ARGS__ }; \
if (__builtin_constant_p (flags) && ((flags) & O_CREAT) != 0) \
{ \
/* If the compiler complains about the size of this array type the \
mode parameter is missing since O_CREAT has been used. */ \
typedef int __open_missing_mode[((flags) & O_CREAT) != 0 \
? ((long int) sizeof (___arr) \
- (long int) sizeof (int)) : 1];\
} \
if (sizeof (___arr) == 0) \
{ \
if (__builtin_constant_p (flags) && ((flags) & O_CREAT) == 0) \
___r = openat (fd, fname, flags); \
else \
___r = __openat_2 (fd, fname, flags); \
} \
else \
{ \
/* If the compiler complains about the size of this array type too \
many parameters have been passed to openat. */ \
typedef int __open_too_many_args[-(sizeof (___arr) \
> sizeof (int))]; \
___r = openat (fd, fname, flags, ___arr[0]); \
} \
___r; \
}))
__extern_always_inline int
openat (int __fd, __const char *__path, int __oflag, ...)
{
if (__va_arg_pack_len () > 1)
__openat_too_many_args ();
if (__builtin_constant_p (__oflag))
{
if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1)
{
__openat_missing_mode ();
return __openat_2 (__fd, __path, __oflag);
}
return __openat_alias (__fd, __path, __oflag, __va_arg_pack ());
}
if (__va_arg_pack_len () < 1)
return __openat_2 (__fd, __path, __oflag);
return __openat_alias (__fd, __path, __oflag, __va_arg_pack ());
}
# ifdef __USE_LARGEFILE64
extern int __openat64_2 (int __fd, __const char *__path, int __oflag)
__nonnull ((2));
extern int __REDIRECT (__openat64_alias, (int __fd, __const char *__path,
int __oflag, ...), openat64)
__nonnull ((2));
__errordecl (__openat64_too_many_args,
"openat64 can be called either with 3 or 4 arguments, not more");
__errordecl (__openat64_missing_mode,
"openat64 with O_CREAT in third argument needs 4 arguments");
# define openat64(fd, fname, flags, ...) \
(__extension__ \
({ int ___r; \
/* If the compiler complains about an invalid type, excess elements, \
etc. in the initialization this means a parameter of the wrong type \
has been passed to openat64. */ \
int ___arr[] = { __VA_ARGS__ }; \
if (__builtin_constant_p (flags) && ((flags) & O_CREAT) != 0) \
{ \
/* If the compiler complains about the size of this array type the \
mode parameter is missing since O_CREAT has been used. */ \
typedef int __open_missing_mode[((flags) & O_CREAT) != 0 \
? ((long int) sizeof (___arr) \
- (long int) sizeof (int)) : 1];\
} \
if (sizeof (___arr) == 0) \
{ \
if (__builtin_constant_p (flags) && ((flags) & O_CREAT) == 0) \
___r = openat64 (fd, fname, flags); \
else \
___r = __openat64_2 (fd, fname, flags); \
} \
else \
{ \
/* If the compiler complains about the size of this array type too \
many parameters have been passed to openat64. */ \
typedef int __open_too_many_args[-(sizeof (___arr) \
> sizeof (int))]; \
___r = openat64 (fd, fname, flags, ___arr[0]); \
} \
___r; \
}))
__extern_always_inline int
openat64 (int __fd, __const char *__path, int __oflag, ...)
{
if (__va_arg_pack_len () > 1)
__openat64_too_many_args ();
if (__builtin_constant_p (__oflag))
{
if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1)
{
__openat64_missing_mode ();
return __openat64_2 (__fd, __path, __oflag);
}
return __openat64_alias (__fd, __path, __oflag, __va_arg_pack ());
}
if (__va_arg_pack_len () < 1)
return __openat64_2 (__fd, __path, __oflag);
return __openat64_alias (__fd, __path, __oflag, __va_arg_pack ());
}
# endif
#endif

4
io/fcntl.h
View File

@ -211,9 +211,9 @@ extern int posix_fallocate64 (int __fd, __off64_t __offset, __off64_t __len);
#endif
/* Define some macros helping to catch common problems. */
/* Define some inlines helping to catch common problems. */
#if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline \
&& !defined __cplusplus
&& defined __va_arg_pack_len
# include <bits/fcntl2.h>
#endif

12
misc/sys/cdefs.h
View File

@ -132,6 +132,7 @@
#define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1)
#define __bos0(ptr) __builtin_object_size (ptr, 0)
#define __warndecl(name, msg) extern void name (void)
#define __errordecl(name, msg) extern void name (void)
/* Support for flexible arrays. */
@ -281,7 +282,10 @@
/* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
inline semantics, unless -fgnu89-inline is used. */
#if !defined __cplusplus || __GNUC_PREREQ (4,3)
#if !defined __cplusplus || __GNUC_PREREQ (4,3) \
|| (defined __GNUC_RH_RELEASE__ && __GNUC__ == 4 \
&& __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 2 \
&& __GNUC_RH_RELEASE__ >= 23)
# if defined __GNUC_STDC_INLINE__ || defined __cplusplus
# define __extern_inline extern __inline __attribute__ ((__gnu_inline__))
# define __extern_always_inline \
@ -294,8 +298,12 @@
/* GCC 4.3 and above allow passing all anonymous arguments of an
__extern_always_inline function to some other vararg function. */
#if __GNUC_PREREQ (4,3)
#if __GNUC_PREREQ (4,3) \
|| (defined __GNUC_RH_RELEASE__ && __GNUC__ == 4 \
&& __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 2 \
&& __GNUC_RH_RELEASE__ >= 23)
# define __va_arg_pack() __builtin_va_arg_pack ()
# define __va_arg_pack_len() __builtin_va_arg_pack_len ()
#endif
/* It is possible to compile containing GCC extensions even if GCC is

4
rt/Makefile
View File

@ -1,4 +1,4 @@
# Copyright (C) 1997-2004, 2006 Free Software Foundation, Inc.
# Copyright (C) 1997-2004, 2006, 2007 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
@ -21,7 +21,7 @@
#
subdir := rt
headers := aio.h mqueue.h bits/mqueue.h
headers := aio.h mqueue.h bits/mqueue.h bits/mqueue2.h
aio-routines := aio_cancel aio_error aio_fsync aio_misc aio_read \
aio_read64 aio_return aio_suspend aio_write \

3
rt/Versions
View File

@ -22,4 +22,7 @@ librt {
mq_open; mq_close; mq_unlink; mq_getattr; mq_setattr;
mq_notify; mq_send; mq_receive; mq_timedsend; mq_timedreceive;
}
GLIBC_2.7 {
__mq_open_2;
}
}

56
rt/bits/mqueue2.h Normal file
View File

@ -0,0 +1,56 @@
/* Checking macros for mq functions.
Copyright (C) 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _FCNTL_H
# error "Never include <bits/mqueue2.h> directly; use <mqueue.h> instead."
#endif
/* Check that calls to mq_open with O_CREAT set have an appropriate third and fourth
parameter. */
extern mqd_t mq_open (__const char *__name, int __oflag, ...)
__THROW __nonnull ((1));
extern mqd_t __mq_open_2 (__const char *__name, int __oflag) __nonnull ((1));
extern mqd_t __REDIRECT (__mq_open_alias, (__const char *__name, int __oflag, ...),
mq_open) __nonnull ((1));
__errordecl (__mq_open_wrong_number_of_args,
"mq_open can be called either with 2 or 4 arguments");
__errordecl (__mq_open_missing_mode_and_attr,
"mq_open with O_CREAT in second argument needs 4 arguments");
__extern_always_inline mqd_t
mq_open (__const char *__name, int __oflag, ...)
{
if (__va_arg_pack_len () != 0 && __va_arg_pack_len () != 2)
__mq_open_wrong_number_of_args ();
if (__builtin_constant_p (__oflag))
{
if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () == 0)
{
__mq_open_missing_mode_and_attr ();
return __mq_open_2 (__name, __oflag);
}
return __mq_open_alias (__name, __oflag, __va_arg_pack ());
}
if (__va_arg_pack_len () == 0)
return __mq_open_2 (__name, __oflag);
return __mq_open_alias (__name, __oflag, __va_arg_pack ());
}

16
rt/mq_open.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2004 Free Software Foundation, Inc.
/* Copyright (C) 2004, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -18,6 +18,7 @@
#include <errno.h>
#include <mqueue.h>
#include <stdio.h>
/* Establish connection between a process and a message queue NAME and
return message queue descriptor or (mqd_t) -1 on error. OFLAG determines
@ -27,10 +28,21 @@
attributes. If the fourth argument is NULL, default attributes are
used. */
mqd_t
mq_open (const char *name, int oflag, ...)
__mq_open (const char *name, int oflag, ...)
{
__set_errno (ENOSYS);
return (mqd_t) -1;
}
strong_alias (__mq_open, mq_open);
stub_warning (mq_open)
mqd_t
__mq_open_2 (const char *name, int oflag)
{
if (oflag & O_CREAT)
__fortify_fail ("invalid mq_open call: O_CREAT without mode and attr");
return __mq_open (name, oflag);
}
stub_warning (__mq_open_2)
#include <stub-tag.h>

6
rt/mqueue.h
View File

@ -90,6 +90,12 @@ extern int mq_timedsend (mqd_t __mqdes, __const char *__msg_ptr,
__nonnull ((2, 5));
#endif
/* Define some inlines helping to catch common problems. */
#if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline \
&& defined __va_arg_pack_len
# include <bits/mqueue2.h>
#endif
__END_DECLS
#endif /* mqueue.h */

14
sysdeps/unix/sysv/linux/mq_open.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2004, 2005 Free Software Foundation, Inc.
/* Copyright (C) 2004, 2005, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -20,6 +20,7 @@
#include <mqueue.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <sysdep.h>
#ifdef __NR_mq_open
@ -32,7 +33,7 @@
attributes. If the fourth argument is NULL, default attributes are
used. */
mqd_t
mq_open (const char *name, int oflag, ...)
__mq_open (const char *name, int oflag, ...)
{
if (name[0] != '/')
{
@ -54,7 +55,16 @@ mq_open (const char *name, int oflag, ...)
return INLINE_SYSCALL (mq_open, 4, name + 1, oflag, mode, attr);
}
strong_alias (__mq_open, mq_open);
mqd_t
__mq_open_2 (const char *name, int oflag)
{
if (oflag & O_CREAT)
__fortify_fail ("invalid mq_open call: O_CREAT without mode and attr");
return __mq_open (name, oflag);
}
#else
# include <rt/mq_open.c>
#endif