contrib/compiler-rt/lib/sanitizer_common/sanitizer_mac_libcdep.cc

   1 //===-- sanitizer_mac_libcdep.cc ------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file is shared between various sanitizers' runtime libraries and
  11 // implements OSX-specific functions.
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "sanitizer_platform.h"
  15 #if SANITIZER_MAC
  16 #include "sanitizer_mac.h"
  17
  18 #include <sys/mman.h>
  19
  20 namespace __sanitizer {
  21
  22 void RestrictMemoryToMaxAddress(uptr max_address) {
  23   uptr size_to_mmap = GetMaxUserVirtualAddress() + 1 - max_address;
  24   void *res = MmapFixedNoAccess(max_address, size_to_mmap, "high gap");
  25   CHECK(res != MAP_FAILED);
  26 }
  27
  28 }  // namespace __sanitizer
  29
  30 #endif  // SANITIZER_MAC