zig/lib/tsan/sanitizer_common/sanitizer_mac_libcdep.cpp
Andrew Kelley 8219d92987 stage2: fix Cache deadlock and build more of TSAN
* rename is_compiler_rt_or_libc to skip_linker_dependencies
   and set it to `true` for all sub-Compilations. I believe
   this resolves the deadlock we were experiencing on Drone
   CI and on some users' computers. I will remove the CI workaround in
   a follow-up commit.
 * enabling TSAN automatically causes the Compilation to link against
   libc++ even if not requested, because TSAN depends on libc++.
 * add -fno-rtti flags where appropriate when building TSAN objects.
   Thanks Firefox317 for pointing this out.
 * TSAN support: resolve all the undefined symbols. We are still seeing
   a dependency on __gcc_personality_v0 but will resolve this one in a
   follow-up commit.
 * static libs do not try to build libc++ or libc++abi.
2020-12-24 01:18:48 -07:00

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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