From 613c7a549abefd1f7806b61589667de683d76858 Mon Sep 17 00:00:00 2001 From: "Gregory P. Smith" Date: Sun, 28 Feb 2010 18:36:09 +0000 Subject: Issue #7481: When a threading.Thread failed to start it would leave the instance stuck in initial state and present in threading.enumerate(). --- Lib/test/test_threading.py | 19 +++++++++++++++++++ Lib/threading.py | 7 ++++++- Misc/NEWS | 3 +++ 3 files changed, 28 insertions(+), 1 deletion(-) diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py index 5daf822..defa9ee 100644 --- a/Lib/test/test_threading.py +++ b/Lib/test/test_threading.py @@ -249,6 +249,25 @@ class ThreadTests(BaseTestCase): t.join() # else the thread is still running, and we have no way to kill it + def test_limbo_cleanup(self): + # Issue 7481: Failure to start thread should cleanup the limbo map. + def fail_new_thread(*args): + raise thread.error() + _start_new_thread = threading._start_new_thread + threading._start_new_thread = fail_new_thread + try: + t = threading.Thread(target=lambda: None) + try: + t.start() + assert False + except thread.error: + self.assertFalse( + t in threading._limbo, + "Failed to cleanup _limbo map on failure of Thread.start()." + ) + finally: + threading._start_new_thread = _start_new_thread + def test_finalize_runnning_thread(self): # Issue 1402: the PyGILState_Ensure / _Release functions may be called # very late on python exit: on deallocation of a running thread for diff --git a/Lib/threading.py b/Lib/threading.py index 5674010..c6fb2da 100644 --- a/Lib/threading.py +++ b/Lib/threading.py @@ -469,7 +469,12 @@ class Thread(_Verbose): self._note("%s.start(): starting thread", self) with _active_limbo_lock: _limbo[self] = self - _start_new_thread(self.__bootstrap, ()) + try: + _start_new_thread(self.__bootstrap, ()) + except Exception: + with _active_limbo_lock: + del _limbo[self] + raise self.__started.wait() def run(self): diff --git a/Misc/NEWS b/Misc/NEWS index f206f03..5b61109 100644 --- a/Misc/NEWS +++ b/Misc/NEWS @@ -72,6 +72,9 @@ Library - Issue #7427: improve the representation of httplib.BadStatusLine exceptions. +- Issue #7481: When a threading.Thread failed to start it would leave the + instance stuck in initial state and present in threading.enumerate(). + Extension Modules ----------------- -- cgit v0.12