Add TSAN suppressions for the free-threaded build

Add TSAN suppressions for existing races in the free-threaded build.

.github/workflows/build.yml

@@ -492,6 +492,7 @@ jobs:
     with:
       config_hash: ${{ needs.check_source.outputs.config_hash }}
       options: ./configure --config-cache --with-thread-sanitizer --with-pydebug
+      suppressions_path: Tools/tsan/supressions.txt
 
   build_tsan_free_threading:
     name: 'Thread sanitizer (free-threading)'
@@ -501,6 +502,7 @@ jobs:
     with:
       config_hash: ${{ needs.check_source.outputs.config_hash }}
       options: ./configure --config-cache --disable-gil --with-thread-sanitizer --with-pydebug
+      suppressions_path: Tools/tsan/suppressions_free_threading.txt
 
   # CIFuzz job based on https://google.github.io/oss-fuzz/getting-started/continuous-integration/
   cifuzz:

.github/workflows/reusable-tsan.yml

@@ -7,6 +7,10 @@ on:
       options:
         required: true
         type: string
+      suppressions_path:
+        description: 'A repo relative path to the suppressions file'
+        required: true
+        type: string
 
 jobs:
   build_tsan_reusable:
@@ -30,7 +34,7 @@ jobs:
         sudo sysctl -w vm.mmap_rnd_bits=28
     - name: TSAN Option Setup
       run: |
-        echo "TSAN_OPTIONS=suppressions=${GITHUB_WORKSPACE}/Tools/tsan/supressions.txt" >> $GITHUB_ENV
+        echo "TSAN_OPTIONS=suppressions=${GITHUB_WORKSPACE}/${{ inputs.suppressions_path }}" >> $GITHUB_ENV
         echo "CC=clang" >> $GITHUB_ENV
         echo "CXX=clang++" >> $GITHUB_ENV
     - name: Add ccache to PATH

Tools/tsan/suppressions_free_threading.txt

@@ -0,0 +1,51 @@
+# This file contains suppressions for the free-threaded build. It contains the
+# suppressions for the default build and additional suppressions needed only in
+# the free-threaded build.
+#
+# reference: https://github.com/google/sanitizers/wiki/ThreadSanitizerSuppressions
+
+## Default build suppresssions
+
+race:get_allocator_unlocked
+race:set_allocator_unlocked
+race:mi_heap_visit_pages
+race:_mi_heap_delayed_free_partial
+
+## Free-threaded suppressions
+
+race:_add_to_weak_set
+race:_in_weak_set
+race:_Py_IsImmortal
+race:_Py_IsOwnedByCurrentThread
+race:_PyEval_EvalFrameDefault
+race:_PyFunction_SetVersion
+race:_PyImport_AcquireLock
+race:_PyImport_ReleaseLock
+race:_PyInterpreterState_SetNotRunningMain
+race:_PyInterpreterState_IsRunningMain
+race:_PyObject_GC_IS_SHARED
+race:_PyObject_GC_SET_SHARED
+race:_PyObject_GC_TRACK
+race:_PyType_HasFeature
+race:_PyType_Lookup
+race:assign_version_tag
+race:compare_unicode_unicode
+race:delitem_common
+race:dictkeys_decref
+race:dictkeys_incref
+race:dictresize
+race:gc_collect_main
+race:gc_restore_tid
+race:initialize_new_array
+race:insertdict
+race:lookup_tp_dict
+race:PyMember_GetOne
+race:PyMember_SetOne
+race:new_reference
+race:set_contains_key
+race:set_inheritable
+race:start_the_world
+race:tstate_set_detached
+race:unicode_hash
+race:update_cache
+race:update_cache_gil_disabled

Tools/tsan/supressions.txt

@@ -1,4 +1,5 @@
-## reference: https://github.com/google/sanitizers/wiki/ThreadSanitizerSuppressions
+# This file contains suppressions for the default (with GIL) build.
+# reference: https://github.com/google/sanitizers/wiki/ThreadSanitizerSuppressions
 race:get_allocator_unlocked
 race:set_allocator_unlocked
 race:mi_heap_visit_pages