From 3a1720af1d7f43edc5b214cde0be11bfb94d077e Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Wed, 23 Oct 2019 17:52:22 +0000
Subject: Vendor import of stripped compiler-rt trunk r375505, the last commit
 before the upstream Subversion repository was made read-only, and the LLVM
 project migrated to GitHub:

https://llvm.org/svn/llvm-project/compiler-rt/trunk@375505
---
 lib/sanitizer_common/sanitizer_mac_libcdep.cpp | 29 ++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 lib/sanitizer_common/sanitizer_mac_libcdep.cpp

(limited to 'lib/sanitizer_common/sanitizer_mac_libcdep.cpp')

diff --git a/lib/sanitizer_common/sanitizer_mac_libcdep.cpp b/lib/sanitizer_common/sanitizer_mac_libcdep.cpp
new file mode 100644
index 000000000000..ac7e328946bf
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_mac_libcdep.cpp
@@ -0,0 +1,29 @@
+//===-- 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
-- 
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