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 
RestrictMemoryToMaxAddress(uptr max_address)20 void RestrictMemoryToMaxAddress(uptr max_address) {
21   uptr size_to_mmap = GetMaxVirtualAddress() + 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
29