libsanitizer/sanitizer_common/sanitizer_mac_libcdep.cc

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