WIP

Author: colesbury

Lib/test/libregrtest/main.py

@@ -201,7 +201,7 @@ def find_tests(self, tests: TestList | None = None) -> tuple[TestTuple, TestList
             setup_pgo_tests(self.cmdline_args, self.pgo_extended)
 
         if self.tsan:
-            setup_tsan_tests(self.cmdline_args)
+            setup_tsan_tests(exclude_tests)
 
         if self.tsan_parallel:
             setup_tsan_parallel_tests(self.cmdline_args)

Lib/test/libregrtest/tsan.py

@@ -31,6 +31,12 @@
     'test_free_threading',
 ]
 
+TSAN_EXCLUDE_TESTS = [
+    'test_multiprocessing_fork',
+    'test_multiprocessing_forkserver',
+    'test_multiprocessing_spawn',
+]
+
 # Tests that should be run with `--parallel-threads=N` under TSAN. These tests
 # typically do not use threads, but are run multiple times in parallel by
 # the regression test runner with the `--parallel-threads` option enabled.
@@ -40,9 +46,8 @@
 ]
 
 
-def setup_tsan_tests(cmdline_args) -> None:
-    if not cmdline_args:
-        cmdline_args[:] = TSAN_TESTS[:]
+def setup_tsan_tests(exclude_tests) -> None:
+    exclude_tests.update(set(TSAN_EXCLUDE_TESTS))
 
 def setup_tsan_parallel_tests(cmdline_args) -> None:
     if not cmdline_args:

Lib/test/test_regrtest.py

@@ -1200,6 +1200,7 @@ def test_coverage(self):
                  r'(?: *[0-9]+ *[0-9]{1,2}\.[0-9]% *[^ ]+ +\([^)]+\)+)+')
         self.check_line(output, regex)
 
+    # TODO(sgross): flaky in TSan
     def test_wait(self):
         # test --wait
         test = self.create_test('wait')