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Title: GH-97002: Prevent `_PyInterpreterFrame`s from backing more than one `PyFrameObject` by brandtbucher · Pull Request #97996 · python/cpython · GitHub

Open Graph Title: GH-97002: Prevent `_PyInterpreterFrame`s from backing more than one `PyFrameObject` by brandtbucher · Pull Request #97996 · python/cpython

X Title: GH-97002: Prevent `_PyInterpreterFrame`s from backing more than one `PyFrameObject` by brandtbucher · Pull Request #97996 · python/cpython

Description: There is a nasty situation where a GC collection during PyFrameObject allocation could create multiple PyFrameObjects for the same _PyInterpreterFrame, which breaks our ownership rules and creates all sorts of opportunities for accessing corrupted memory. If this happens, we just keep the PyFrameObject that has already been exposed to user code, and throw away the duplicate. Issue: gh-97002

Open Graph Description: There is a nasty situation where a GC collection during PyFrameObject allocation could create multiple PyFrameObjects for the same _PyInterpreterFrame, which breaks our ownership rules and creates ...

X Description: There is a nasty situation where a GC collection during PyFrameObject allocation could create multiple PyFrameObjects for the same _PyInterpreterFrame, which breaks our ownership rules and creates ...

Opengraph URL: https://github.com/python/cpython/pull/97996

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ce322b3 Add failing regression test brandtbucher Oct 6, 2022 https://github.com/python/cpython/pull/97996/commits/ce322b31c55d4092e8a408e126be3db4bea7de84
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