1 //===-- sanitizer_mac_libcdep.cpp -----------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file is shared between various sanitizers' runtime libraries and 10 // implements OSX-specific functions. 11 //===----------------------------------------------------------------------===// 12 13 #include "sanitizer_platform.h" 14 #if SANITIZER_APPLE 15 #include "sanitizer_mac.h" 16 17 #include <sys/mman.h> 18 19 namespace __sanitizer { 20 RestrictMemoryToMaxAddress(uptr max_address)21void RestrictMemoryToMaxAddress(uptr max_address) { 22 uptr size_to_mmap = GetMaxUserVirtualAddress() + 1 - max_address; 23 void *res = MmapFixedNoAccess(max_address, size_to_mmap, "high gap"); 24 CHECK(res != MAP_FAILED); 25 } 26 27 } // namespace __sanitizer 28 29 #endif // SANITIZER_APPLE 30