pythongh-112536: Add test_threading to TSAN tests (python#116898)

Author: pitrou

Lib/test/libregrtest/tsan.py

@@ -15,6 +15,7 @@
     'test_syslog',
     'test_thread',
     'test_threadedtempfile',
+    'test_threading',
     'test_threading_local',
     'test_threadsignals',
     'test_weakref',

Lib/test/support/script_helper.py

@@ -64,8 +64,8 @@ class _PythonRunResult(collections.namedtuple("_PythonRunResult",
     """Helper for reporting Python subprocess run results"""
     def fail(self, cmd_line):
         """Provide helpful details about failed subcommand runs"""
-        # Limit to 80 lines to ASCII characters
-        maxlen = 80 * 100
+        # Limit to 300 lines of ASCII characters
+        maxlen = 300 * 100
         out, err = self.out, self.err
         if len(out) > maxlen:
             out = b'(... truncated stdout ...)' + out[-maxlen:]

Lib/test/test_threading.py

@@ -47,6 +47,8 @@ def skip_unless_reliable_fork(test):
         return unittest.skip("due to known OS bug related to thread+fork")(test)
     if support.HAVE_ASAN_FORK_BUG:
         return unittest.skip("libasan has a pthread_create() dead lock related to thread+fork")(test)
+    if support.check_sanitizer(thread=True):
+        return unittest.skip("TSAN doesn't support threads after fork")
     return test
 
 
@@ -384,6 +386,10 @@ def test_finalize_running_thread(self):
         # Issue 1402: the PyGILState_Ensure / _Release functions may be called
         # very late on python exit: on deallocation of a running thread for
         # example.
+        if support.check_sanitizer(thread=True):
+            # the thread running `time.sleep(100)` below will still be alive
+            # at process exit
+            self.skipTest("TSAN would report thread leak")
         import_module("ctypes")
 
         rc, out, err = assert_python_failure("-c", """if 1:
@@ -416,6 +422,11 @@ def waitingThread():
     def test_finalize_with_trace(self):
         # Issue1733757
         # Avoid a deadlock when sys.settrace steps into threading._shutdown
+        if support.check_sanitizer(thread=True):
+            # the thread running `time.sleep(2)` below will still be alive
+            # at process exit
+            self.skipTest("TSAN would report thread leak")
+
         assert_python_ok("-c", """if 1:
             import sys, threading
 
@@ -1223,6 +1234,11 @@ def test_4_daemon_threads(self):
         # Check that a daemon thread cannot crash the interpreter on shutdown
         # by manipulating internal structures that are being disposed of in
         # the main thread.
+        if support.check_sanitizer(thread=True):
+            # some of the threads running `random_io` below will still be alive
+            # at process exit
+            self.skipTest("TSAN would report thread leak")
+
         script = """if True:
             import os
             import random