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- import sys, time, threading, thread, os, traceback, threadframe, pprint
- # daemon thread that spouts Monty Pythonesque nonsense
- class T(threading.Thread):
- def run(self):
- while 1:
- time.sleep(1)
- print '[%d] Spam spam spam spam. Lovely spam! Wonderful spam!' % ( thread.get_ident(), )
- # thread that cause a deliberate deadlock with itself
- U_lock = threading.Lock()
- class U(threading.Thread):
- def run(self):
- U_lock.acquire()
- U_lock.acquire()
- # thread that will exit after the thread frames are extracted but before
- # they are printed
- V_event = threading.Event()
- class V(threading.Thread):
- def run(self):
- V_event.clear()
- V_event.wait()
-
- print 'ident of main thread is: %d' % (thread.get_ident(),)
- print
- print 'launching daemon thread...',
- T().start()
- print 'done'
- print 'launching self-deadlocking thread...',
- U().start()
- print 'done'
- print 'launching thread that will die before the end...',
- v = V()
- v.start()
- print 'done'
- time.sleep(5)
- # Python 2.2 does not support threadframe.dict()
- if sys.hexversion < 0x02030000:
- frames = threadframe.threadframe()
- else:
- frames = threadframe.dict()
- # signal the thread V to die, then wait for it to oblige
- V_event.set()
- v.join()
- if sys.hexversion < 0x02030000:
- for frame in frames:
- print '-' * 72
- print 'frame ref count = %d' % sys.getrefcount(frame)
- traceback.print_stack(frame)
- else:
- for thread_id, frame in frames.iteritems():
- print '-' * 72
- print '[%s] %d' % (thread_id, sys.getrefcount(frame))
- traceback.print_stack(frame)
- os._exit(0)
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