pythongh-112536: Set up TSAN CI for free-threading

Author: corona10

.github/workflows/build.yml

@@ -472,6 +472,64 @@ jobs:
     - name: Tests
       run: xvfb-run make test
 
+  build_tsan_free_threading:
+    name: 'Thread sanitizer (free-threading)'
+    runs-on: ubuntu-20.04
+    timeout-minutes: 60
+    needs: check_source
+    if: needs.check_source.outputs.run_tests == 'true'
+    env:
+      OPENSSL_VER: 3.0.13
+      PYTHONSTRICTEXTENSIONBUILD: 1
+      ASAN_OPTIONS: detect_leaks=0:allocator_may_return_null=1:handle_segv=0
+    steps:
+    - uses: actions/checkout@v4
+    - name: Runner image version
+      run: echo "IMAGE_VERSION=${ImageVersion}" >> $GITHUB_ENV
+    - name: Restore config.cache
+      uses: actions/cache@v4
+      with:
+        path: config.cache
+        key: ${{ github.job }}-${{ runner.os }}-${{ env.IMAGE_VERSION }}-${{ needs.check_source.outputs.config_hash }}
+    - name: Register gcc problem matcher
+      run: echo "::add-matcher::.github/problem-matchers/gcc.json"
+    - name: Install Dependencies
+      run: sudo ./.github/workflows/posix-deps-apt.sh
+    - name: Set up GCC-10 for TSAN
+      uses: egor-tensin/setup-gcc@v1
+      with:
+        version: 10
+    - name: Configure OpenSSL env vars
+      run: |
+        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> $GITHUB_ENV
+        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> $GITHUB_ENV
+        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> $GITHUB_ENV
+    - name: 'Restore OpenSSL build'
+      id: cache-openssl
+      uses: actions/cache@v4
+      with:
+        path: ./multissl/openssl/${{ env.OPENSSL_VER }}
+        key: ${{ runner.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
+    - name: Install OpenSSL
+      if: steps.cache-openssl.outputs.cache-hit != 'true'
+      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory $MULTISSL_DIR --openssl $OPENSSL_VER --system Linux
+    - name: Add ccache to PATH
+      run: |
+        echo "PATH=/usr/lib/ccache:$PATH" >> $GITHUB_ENV
+    - name: Configure ccache action
+      uses: hendrikmuhs/[email protected]
+      with:
+        save: ${{ github.event_name == 'push' }}
+        max-size: "200M"
+    - name: Configure CPython
+      run: ./configure --config-cache --with-thread-sanitizer --disable-gil
+    - name: Build CPython
+      run: make -j4
+    - name: Display build info
+      run: make pythoninfo
+    - name: Tests
+      run: xvfb-run make test
+
   # CIFuzz job based on https://google.github.io/oss-fuzz/getting-started/continuous-integration/
   cifuzz:
     name: CIFuzz

configure

@@ -3264,6 +3264,12 @@ AC_MSG_RESULT([no])
 with_tsan="no"
 ])
 
+if test "$with_tsan" = "yes"
+then
+  AC_DEFINE([MI_TSAN], [1],
+            [Define MI_TSAN for thread sanitizer])
+fi
+
 # Set info about shared libraries.
 AC_SUBST([SHLIB_SUFFIX])
 AC_SUBST([LDSHARED])

configure.ac

@@ -1588,6 +1588,9 @@
    <sysmacros.h>. */
 #undef MAJOR_IN_SYSMACROS
 
+/* Define MI_TSAN for thread sanitizer */
+#undef MI_TSAN
+
 /* Define if mvwdelch in curses.h is an expression. */
 #undef MVWDELCH_IS_EXPRESSION