r362138 - [GWP-ASan] Mutex implementation .
Mitch Phillips via cfe-commits
cfe-commits at lists.llvm.org
Thu May 30 12:45:32 PDT 2019
Date: Thu May 30 12:45:32 2019
New Revision: 362138
[GWP-ASan] Mutex implementation .
See D60593 for further information.
This patch pulls out the mutex implementation and the required definitions file.
We implement our own mutex for GWP-ASan currently, because:
1. We must be compatible with the sum of the most restrictive elements of the supporting allocator's build system. Current targets for GWP-ASan include Scudo (on Linux and Fuchsia), and bionic (on Android).
2. Scudo specifies `-nostdlib++ -nonodefaultlibs`, meaning we can't use `std::mutex` or `mtx_t`.
3. We can't use `sanitizer_common`'s mutex, as the supporting allocators cannot afford the extra maintenance (Android, Fuchsia) and code size (Fuchsia) overheads that this would incur.
In future, we would like to implement a shared base mutex for GWP-ASan, Scudo and sanitizer_common. This will likely happen when both GWP-ASan and Scudo standalone are not in the development phase, at which point they will have stable requirements.
Reviewers: vlad.tsyrklevich, morehouse, jfb
Reviewed By: morehouse
Subscribers: dexonsmith, srhines, cfe-commits, kubamracek, mgorny, cryptoad, jfb, #sanitizers, llvm-commits, vitalybuka, eugenis
Tags: #sanitizers, #llvm, #clang
Differential Revision: https://reviews.llvm.org/D61923
--- cfe/trunk/runtime/CMakeLists.txt (original)
+++ cfe/trunk/runtime/CMakeLists.txt Thu May 30 12:45:32 2019
@@ -132,7 +132,7 @@ if(LLVM_BUILD_EXTERNAL_COMPILER_RT AND E
# Add top-level targets for various compiler-rt test suites.
set(COMPILER_RT_TEST_SUITES check-fuzzer check-asan check-hwasan check-asan-dynamic check-dfsan
check-lsan check-msan check-sanitizer check-tsan check-ubsan check-ubsan-minimal
- check-profile check-cfi check-cfi-and-supported check-safestack)
+ check-profile check-cfi check-cfi-and-supported check-safestack check-gwp_asan)
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