import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

testing/mozbase/mozprocess/tests/infinite_loop.py

@@ -0,0 +1,18 @@
+import threading
+import time
+import sys
+import signal
+
+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)