Run msan in CI. Closes #66

.gitea/workflows/ci.yml

@@ -116,8 +116,10 @@ jobs:
         include:
           - runner: ubuntu-latest-amd64
             arch: amd64
+            cmake_args: -DMSAN_TOOLCHAIN_PATH=/opt/msan
           - runner: ubuntu-latest-arm64
             arch: arm64
+            cmake_args: ""
     runs-on: ${{ matrix.runner }}
     steps:
       - uses: actions/checkout@v4
@@ -158,11 +160,18 @@ jobs:
           restore-keys: |
             ccache-release-${{ matrix.arch }}-
 
+      - name: Download MSan toolchain
+        if: matrix.arch == 'amd64'
+        run: |
+          curl -Ls "https://minio.weaselab.dev/public/x86_64/msan-toolchain-21.1.8.tar.zst" -o /tmp/msan-toolchain.tar.zst
+          sudo mkdir -p /opt/msan
+          sudo tar --zstd -xf /tmp/msan-toolchain.tar.zst -C /opt/msan
+
       - name: Build
         run: |
           export CCACHE_DIR="$GITHUB_WORKSPACE/.ccache"
           rm -rf build
-          cmake -S . -B build -G Ninja -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_FLAGS=-DNVALGRIND
+          cmake -S . -B build -G Ninja -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_FLAGS=-DNVALGRIND ${{ matrix.cmake_args }}
           ninja -C build
           ccache -s