1 files changed, 30 insertions, 0 deletions
diff --git a/lib/sanitizer_common/sanitizer_mac_libcdep.cc b/lib/sanitizer_common/sanitizer_mac_libcdep.cc
new file mode 100644
index 000000000..c95daa937
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_mac_libcdep.cc
@@ -0,0 +1,30 @@
+//===-- sanitizer_mac_libcdep.cc ------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is shared between various sanitizers' runtime libraries and
+// implements OSX-specific functions.
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_platform.h"
+#if SANITIZER_MAC
+#include "sanitizer_mac.h"
+
+#include <sys/mman.h>
+
+namespace __sanitizer {
+
+void RestrictMemoryToMaxAddress(uptr max_address) {
+  uptr size_to_mmap = GetMaxVirtualAddress() + 1 - max_address;
+  void *res = MmapFixedNoAccess(max_address, size_to_mmap, "high gap");
+  CHECK(res != MAP_FAILED);
+}
+
+}  // namespace __sanitizer
+
+#endif  // SANITIZER_MAC