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(Merge 3.2) Issue #12310: finalize the old process after _run_after_forkers()

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multiprocessing: Process._bootstrap() keeps a reference to the old process to
delay its finalization until after _run_after_forkers() as been executed. This
change should fix a crash on Mac OS X Tiger when a lock is released after a
fork.

Patch written by Charles-François Nataliv and Antoine Pitrou.
This commit is contained in:
Victor Stinner 2011-06-17 12:36:26 +02:00
commit 3bcc0170bd
1 changed files with 8 additions and 2 deletions
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6
Lib/multiprocessing/process.py
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@ -267,9 +267,15 @@ class Process(object):
sys.stdin = open(os.devnull) sys.stdin = open(os.devnull)
except (OSError, ValueError): except (OSError, ValueError):
pass pass
old_process = _current_process
_current_process = self _current_process = self
try:
util._finalizer_registry.clear() util._finalizer_registry.clear()
util._run_after_forkers() util._run_after_forkers()
finally:
# delay finalization of the old process object until after
# _run_after_forkers() is executed
del old_process
util.info('child process calling self.run()') util.info('child process calling self.run()')
try: try:
self.run() self.run()