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author | Ulrich Drepper <drepper@redhat.com> | 2007-08-28 20:33:49 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2007-08-28 20:33:49 +0000 |
commit | 3586b2b60b6d92ce3cc3d497e84ae1e5cfcf81e4 (patch) | |
tree | 4d2932e03d37e5410698f2415257c2065a0959de /debug/fread_u_chk.c | |
parent | cba5c7c07388e2a8251c470c279797dc303d4277 (diff) | |
download | glibc-3586b2b60b6d92ce3cc3d497e84ae1e5cfcf81e4.zip glibc-3586b2b60b6d92ce3cc3d497e84ae1e5cfcf81e4.tar.gz glibc-3586b2b60b6d92ce3cc3d497e84ae1e5cfcf81e4.tar.bz2 |
* libio/bits/stdio2.h (__fread_chk, __fread_unlocked_chk): New
prototypes.
(__fread_alias, __fread_unlocked_alias): New aliases.
(fread): New extern inline.
(fread_unlocked): Likewise. Undef macro before definition of
the inline function.
* debug/Makefile (routines): Add fread_chk and fread_u_chk.
(CFLAGS-fread_chk.c, CFLAGS-fread_u_chk.c): Add.
* debug/Versions (libc): Export __fread_chk@@GLIBC_2.7
and __fread_unlocked_chk@@GLIBC_2.7.
* debug/fread_chk.c: New file.
* debug/fread_u_chk.c: New file.
* debug/tst-chk1.c (do_test): Add fread and fread_unlocked tests.
Diffstat (limited to 'debug/fread_u_chk.c')
-rw-r--r-- | debug/fread_u_chk.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/debug/fread_u_chk.c b/debug/fread_u_chk.c new file mode 100644 index 0000000..72a007e --- /dev/null +++ b/debug/fread_u_chk.c @@ -0,0 +1,54 @@ +/* Copyright (C) 1993, 1995, 1997, 1998, 1999, 2002, 2003, 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. + + As a special exception, if you link the code in this file with + files compiled with a GNU compiler to produce an executable, + that does not cause the resulting executable to be covered by + the GNU Lesser General Public License. This exception does not + however invalidate any other reasons why the executable file + might be covered by the GNU Lesser General Public License. + This exception applies to code released by its copyright holders + in files containing the exception. */ + +#include "libioP.h" +#include <stdio.h> + +size_t +__fread_unlocked_chk (void *__restrict ptr, size_t ptrlen, + size_t size, size_t n, FILE *__restrict stream) +{ + size_t bytes_requested = size * n; + if (__builtin_expect ((n | size) + >= (((size_t) 1) << (8 * sizeof (size_t) / 2)), 0)) + { + if (size != 0 && bytes_requested / size != n) + __chk_fail (); + } + + if (__builtin_expect (bytes_requested > ptrlen, 0)) + __chk_fail (); + + CHECK_FILE (stream, 0); + if (bytes_requested == 0) + return 0; + + size_t bytes_read + = INTUSE(_IO_sgetn) (stream, (char *) ptr, bytes_requested); + return bytes_requested == bytes_read ? n : bytes_read / size; +} |