infinite_loop.py - mozsearch

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import signal

import sys

import threading

import time

if "deadlock" in sys.argv:

    lock = threading.Lock()

    def trap(sig, frame):

        lock.acquire()

    # get the lock once

    lock.acquire()

    # and take it again on SIGTERM signal: deadlock.

    signal.signal(signal.SIGTERM, trap)

while 1:

    time.sleep(1)