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Issue #13992: The trashcan mechanism is now thread-safe. This eliminates

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sporadic crashes in multi-thread programs when several long deallocator
chains ran concurrently and involved subclasses of built-in container
types.

Because of this change, a couple extension modules compiled for 3.2.4
(those which use the trashcan mechanism, despite it being undocumented)
will not be loadable by 3.2.3 and earlier. However, extension modules
compiled for 3.2.3 and earlier will be loadable by 3.2.4.
This commit is contained in:
Antoine Pitrou 2012-09-06 00:59:49 +02:00
parent 1d857453b7
commit 56cd62c04a
7 changed files with 140 additions and 9 deletions
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3
Include/pystate.h
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@ -113,6 +113,9 @@ typedef struct _ts {
PyObject *async_exc; /* Asynchronous exception to raise */
long thread_id; /* Thread id where this tstate was created */
int trash_delete_nesting;
PyObject *trash_delete_later;
/* XXX signal handlers should also be here */
} PyThreadState;