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-rw-r--r--lib/sanitizer_common/sanitizer_mac_libcdep.cpp29
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diff --git a/lib/sanitizer_common/sanitizer_mac_libcdep.cpp b/lib/sanitizer_common/sanitizer_mac_libcdep.cpp
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+++ b/lib/sanitizer_common/sanitizer_mac_libcdep.cpp
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+//===-- sanitizer_mac_libcdep.cpp -----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// 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 = GetMaxUserVirtualAddress() + 1 - max_address;
+ void *res = MmapFixedNoAccess(max_address, size_to_mmap, "high gap");
+ CHECK(res != MAP_FAILED);
+}
+
+} // namespace __sanitizer
+
+#endif // SANITIZER_MAC