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Issue #28779: multiprocessing.set_forkserver_preload() would crash the forkserver process if a preloaded module instantiated some multiprocessing objects such as locks.

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This commit is contained in:
Antoine Pitrou 2016-12-10 17:16:17 +01:00
commit ebb39bcc04
5 changed files with 37 additions and 2 deletions
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2
Lib/multiprocessing/context.py
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@ -196,7 +196,7 @@ class BaseContext(object):
def get_start_method(self, allow_none=False):
return self._name
def set_start_method(self, method=None):
def set_start_method(self, method, force=False):
raise ValueError('cannot set start method of concrete context')
@property

2
Lib/multiprocessing/spawn.py
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@ -217,7 +217,7 @@ def prepare(data):
process.ORIGINAL_DIR = data['orig_dir']
if 'start_method' in data:
set_start_method(data['start_method'])
set_start_method(data['start_method'], force=True)
if 'init_main_from_name' in data:
_fixup_main_from_name(data['init_main_from_name'])