andrewandweaselbot
0510f01fe1
Add build_msan_toolchain.sh to produce a tarball containing an MSan-instrumented libc++/libc++abi/libunwind toolchain, and add an msan CI job that downloads the tarball and runs the test suite under MSan. Also add USE_MSAN CMake option that disables conflicting sanitizers, switches to lld, and propagates -fsanitize=memory to the shared library and fuzz_driver targets.
44 lines
1.2 KiB
Bash
Executable File
44 lines
1.2 KiB
Bash
Executable File
#!/bin/bash
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set -euxo pipefail
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LLVM_VERSION="${LLVM_VERSION:-21}"
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MSAN_PREFIX="${MSAN_PREFIX:-$PWD/msan}"
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JOBS="${JOBS:-$(nproc)}"
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cd /tmp
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rm -rf libcxx-msan
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mkdir libcxx-msan
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cd libcxx-msan
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git clone --depth=1 "https://github.com/llvm/llvm-project.git" -b "release/${LLVM_VERSION}.x"
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cmake -S llvm-project/runtimes -B build \
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-DCMAKE_BUILD_TYPE=Release \
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-DCMAKE_C_COMPILER="clang-${LLVM_VERSION}" \
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-DCMAKE_CXX_COMPILER="clang++-${LLVM_VERSION}" \
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-DLLVM_USE_SANITIZER=MemoryWithOrigins \
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-DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;libunwind" \
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-DLLVM_TARGETS_TO_BUILD=Native \
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-DCMAKE_INSTALL_PREFIX="${MSAN_PREFIX}" \
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-DLIBCXXABI_USE_LLVM_UNWINDER=ON \
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-DLIBCXXABI_ENABLE_STATIC_UNWINDER=ON \
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-DLIBCXX_USE_COMPILER_RT=ON \
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-DLIBCXXABI_USE_COMPILER_RT=ON \
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-DLIBUNWIND_USE_COMPILER_RT=ON \
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-DLIBCXX_INCLUDE_TESTS=OFF \
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-DLIBCXXABI_INCLUDE_TESTS=OFF \
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-DLIBUNWIND_INCLUDE_TESTS=OFF \
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-DLIBCXX_ENABLE_CLANG_TIDY=OFF
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cmake --build build -j"${JOBS}"
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cmake --install build
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VERSION="$(clang-"${LLVM_VERSION}" --version | head -n1 | sed -E 's/.*clang version ([0-9.]+).*/\1/')"
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TARBALL="msan-toolchain-${VERSION}.tar.zst"
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tar --zstd -cf "${TARBALL}" -C "${MSAN_PREFIX}" .
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TARBALL_PATH="$(pwd)/${TARBALL}"
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echo "Created: ${TARBALL_PATH}"
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