svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r87710 | gregory.p.smith | 2011-01-03 13:06:12 -0800 (Mon, 03 Jan 2011) | 4 lines
issue6643 - Two locks held within the threading module on each thread instance
needed to be reinitialized after fork(). Adds tests to confirm that they are
and that a potential deadlock and crasher bug are fixed (platform dependant).
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This required a bit more fiddling for 2.x as __block and __started are __
private as well as the __started Event's __cond. A new "private"
_reset_internal_locks() method is added to Thread and _Event objects to
address this.
svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r85586 | gregory.p.smith | 2010-10-16 17:17:24 -0700 (Sat, 16 Oct 2010) | 2 lines
fix for netbsd.
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r85587 | gregory.p.smith | 2010-10-16 17:43:10 -0700 (Sat, 16 Oct 2010) | 3 lines
applying netbsd-wizs-mod.patch from issue5510 -
fixes for netbsd (and dragonflybsd?)
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r85596 | gregory.p.smith | 2010-10-16 19:14:36 -0700 (Sat, 16 Oct 2010) | 6 lines
Fix multiprocessing Semaphore's on netbsd5. SEM_VALUE_MAX is defined
as (~0U) on NetBSD which was causing it to appear as -1 when used as
a signed int for _multprocessing.SemLock.SEM_VALUE_MAX. This works
around the problem by substituting INT_MAX on systems where it appears
negative when used as an int.
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r85597 | gregory.p.smith | 2010-10-16 19:57:19 -0700 (Sat, 16 Oct 2010) | 2 lines
skip test_itimer_virtual on NetBSD to prevent the test suite from hanging.
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r85598 | gregory.p.smith | 2010-10-16 20:09:12 -0700 (Sat, 16 Oct 2010) | 2 lines
Avoid hanging the test on netbsd5.
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* Use try/except ImportError or test_support.import_module() to import thread
and threading modules
* Add @unittest.skipUnless(threading, ...) to testcases using threads
calling fork() from a child thread. This disables that unit test (with a note
printed to stderr) on those platforms.
A caveat about buggy platforms is added to the os.fork documentation.
calls threading.currentThread.
The correction somewhat improves the code, but it was close.
Many thanks to the "with" construct, which turns python code into C calls.
I wonder if it is not better to sys.settrace(None) just after
running the __main__ module and before finalization.
up after it was joined had a traceback pointing to that thread's (deleted)
target attribute, while the test was trying to check that the target was
destroyed. Big thanks to Antoine Pitrou for diagnosing the race and pointing
out sys.exc_clear() to kill the exception early. This fixes issue 2496.
failures. The test for enumerate-after-join is now a little less rigorous, but
the bug it references says the error happened in the first couple iterations,
so 100 iterations should still be enough.
cProfile was useful for identifying the slow tests here.
class RunSelfFunction(object):
def __init__(self):
self.thread = threading.Thread(target=self._run)
self.thread.start()
def _run(self):
pass
from creating a permanent cycle between the object and the thread by having the
Thread delete its references to the object when it completes.
As an example of the effect of this bug, paramiko.Transport inherits from
Thread to avoid it.
(in deallocation of running threads, for example), so the PyGILState_Release()
function must still be functional.
On the other hand, _PyGILState_Fini() only frees memory, and can be called later.
Backport candidate, but only after some experts comment on it.
64-bit boxes. I have no idea what the ctypes docs mean
by "integers", and blind-guessing here that it intended to
mean the signed C "int" type, in which case perhaps I can
repair this by feeding the thread id argument to type
ctypes.c_long().
Also made the worker thread daemonic, so it doesn't hang
Python shutdown if the test continues to fail.
PyThreadState_SetAsyncExc(): internal correctness changes wrt
refcount safety and deadlock avoidance. Also added a basic test
case (relying on ctypes) and repaired the docs.
Heavily revised, comprising revisions:
46640 - original trunk revision (backed out in r46655)
46647 - markup fix (backed out in r46655)
46692:46918 merged from branch aimacintyre-sf1454481
branch tested on buildbots (Windows buildbots had problems
not related to these changes).
46640 Patch #1454481: Make thread stack size runtime tunable.
46647 Markup fix
The first is causing many buildbots to fail test runs, and there
are multiple causes with seemingly no immediate prospects for
repairing them. See python-dev discussion.
Note that a branch can (and should) be created for resolving these
problems, like
svn copy svn+ssh://svn.python.org/python/trunk -r46640 svn+ssh://svn.python.org/python/branches/NEW_BRANCH
followed by merging rev 46647 to the new branch.
Charles-François Natali
Victor Stinner
Ned Deily
Ezio Melotti
Gregory P. Smith
Brian Curtin
Antoine Pitrou
Benjamin Peterson
Georg Brandl
Jesse Noller
Amaury Forgeot d'Arc
Jeffrey Yasskin
Collin Winter
Tim Peters
Andrew MacIntyre