Petr Viktorin ba088c8f9c gh-71936: Fix race condition in multiprocessing.Pool (GH-124973) ...

* gh-71936: Fix race condition in multiprocessing.Pool

Proxes of shared objects register a Finalizer in BaseProxy._incref(), and it
will call BaseProxy._decref() when it is GCed. This may cause a race condition
with Pool(maxtasksperchild=None) on Windows.

A connection would be closed and raised TypeError when a GC occurs between
_ConnectionBase._check_writable() and _ConnectionBase._send_bytes() in
_ConnectionBase.send() in the second or later task, and a new object
is allocated that shares the id() of a previously deleted one.

Instead of using the id() of the token (or the proxy), use a unique,
non-reusable number.

Co-Authored-By: Akinori Hattori <hattya@gmail.com>

2024-11-13 10:25:10 +01:00

..

dummy

…

__init__.py

…

connection.py

gh-121313: multiprocessing: simplify by increasing the connection buffer size to 64KiB (GH-123559)

2024-09-02 20:32:38 -07:00

context.py

gh-84559: Change the multiprocessing start method default to forkserver (GH-101556)

2024-09-26 16:57:19 -07:00

forkserver.py

gh-117378: Fix multiprocessing forkserver preload sys.path inheritance. (GH-126538)

2024-11-09 23:01:32 +00:00

heap.py

…

managers.py

gh-71936: Fix race condition in multiprocessing.Pool (GH-124973)

2024-11-13 10:25:10 +01:00

pool.py

…

popen_fork.py

…

popen_forkserver.py

…

popen_spawn_posix.py

…

popen_spawn_win32.py

…

process.py

…

queues.py

…

reduction.py

…

resource_sharer.py

…

resource_tracker.py

…

shared_memory.py

…

sharedctypes.py

…

spawn.py

…

synchronize.py

gh-125679: multiprocessing Lock and RLock - fix invalid representation string on MacOSX. (#125680)

2024-11-07 08:10:57 +00:00

util.py

gh-125620: Remove unnecessary import of subprocess in spawnv_passfds (#125624)

2024-10-16 22:42:29 +00:00