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b667dd70 | 1 | //===-- sanitizer_mac_libcdep.cpp -----------------------------------------===// |
5d3805fc | 2 | // |
b667dd70 ML |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. | |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |
5d3805fc JJ |
6 | // |
7 | //===----------------------------------------------------------------------===// | |
8 | // | |
9 | // This file is shared between various sanitizers' runtime libraries and | |
10 | // implements OSX-specific functions. | |
11 | //===----------------------------------------------------------------------===// | |
12 | ||
13 | #include "sanitizer_platform.h" | |
14 | #if SANITIZER_MAC | |
15 | #include "sanitizer_mac.h" | |
16 | ||
17 | #include <sys/mman.h> | |
18 | ||
19 | namespace __sanitizer { | |
20 | ||
21 | void RestrictMemoryToMaxAddress(uptr max_address) { | |
eac97531 | 22 | uptr size_to_mmap = GetMaxUserVirtualAddress() + 1 - max_address; |
5d3805fc JJ |
23 | void *res = MmapFixedNoAccess(max_address, size_to_mmap, "high gap"); |
24 | CHECK(res != MAP_FAILED); | |
25 | } | |
26 | ||
27 | } // namespace __sanitizer | |
28 | ||
29 | #endif // SANITIZER_MAC |