1/* 2 * Copyright (c) 2007-2013 Apple Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23 24#include <stdlib.h> 25#include <string.h> 26#include "secure.h" 27 28void * 29__memcpy_chk (void *dest, const void *src, size_t len, size_t dstlen) 30{ 31 if (__builtin_expect (dstlen < len, 0)) 32 __chk_fail_overflow (); 33 34 /* On OS X, memcpy has supported overlapping buffers for many years. 35 * While technically, this will catch buggy code, we should not abort. 36 * if (__builtin_expect (__chk_assert_no_overlap != 0, 1)) 37 * __chk_overlap(dest, len, src, len); 38 */ 39 40 return memcpy (dest, src, len); 41} 42