[issue11223] interruption of locks by signals not guaranteed when the semaphore implementation is not used
STINNER Victor
report at bugs.python.org
Thu Feb 17 11:55:14 CET 2011
STINNER Victor <victor.stinner at haypocalc.com> added the comment:
> Here is what faulthandler reports when I trigger it as Python
> is locked in test_socket:
> ...
> File ".../Lib/test/fork_wait.py", line 30 in f
faulthandler doesn't print the source code line (yet?). Here is the code:
class ForkWait(unittest.TestCase):
...
def f(self, id):
while not self.stop:
self.alive[id] = os.getpid()
try:
time.sleep(SHORTSLEEP) <~~~ here
except IOError:
pass
ForkWait.f() is used by ForkWait.test_wait() which creates 4 threads. You may use all_threads=True option of faulthandler to get the backtrace of all threads.
Because ForkWait.test_wait() uses fork, you may also need to dump the backtrace of two processes.
Debug threads+multiple processes is something horrible :-)
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<http://bugs.python.org/issue11223>
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