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      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
     31