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GeezerVison is showing github.com — [3.12] gh-105699: Use a Thread-Local Variable for PKGCONTEXT (gh-105740) by miss-islington · Pull Request #105765 · python/cpython

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@miss-islington

@miss-islington miss-islington commented Jun 14, 2023 •
edited by bedevere-bot
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This fixes a race during import. The existing _PyRuntimeState.imports.pkgcontext is shared between interpreters, and occasionally this would cause a crash when multiple interpreters were importing extensions modules at the same time. To solve this we add a thread-local variable for the value. We also leave the existing state (and infrequent race) in place for platforms that do not support thread-local variables.
(cherry picked from commit b87d288)

Co-authored-by: Eric Snow [email protected]

  • Issue: Crash During Subinterpreter Finalization #105699

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@ericsnowcurrently @miss-islington
pythongh-105699: Use a Thread-Local Variable for PKGCONTEXT (pythongh…
bfb6863
…-105740)

This fixes a race during import. The existing _PyRuntimeState.imports.pkgcontext is shared between interpreters, and occasionally this would cause a crash when multiple interpreters were importing extensions modules at the same time.  To solve this we add a thread-local variable for the value.  We also leave the existing state (and infrequent race) in place for platforms that do not support thread-local variables.
(cherry picked from commit b87d288)

Co-authored-by: Eric Snow <[email protected]>
@miss-islington
miss-islington requested review from brettcannon, encukou, ericsnowcurrently, ncoghlan and warsaw as code owners June 14, 2023 00:58
@bedevere-bot bedevere-bot added the awaiting review label Jun 14, 2023
This was referenced Jun 14, 2023
Crash During Subinterpreter Finalization #105699
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gh-105699: Use a Thread-Local Variable for PKGCONTEXT #105740
Merged
@bedevere-bot bedevere-bot added the skip news label Jun 14, 2023
@ericsnowcurrently
ericsnowcurrently enabled auto-merge (squash) June 14, 2023 01:00
@ericsnowcurrently
ericsnowcurrently removed request for brettcannon, encukou, ncoghlan and warsaw June 14, 2023 01:00
@ericsnowcurrently
ericsnowcurrently merged commit bc997b3 into python:3.12 Jun 14, 2023
@bedevere-bot bedevere-bot removed the awaiting review label Jun 14, 2023
@miss-islington
miss-islington deleted the backport-b87d288-3.12 branch June 14, 2023 01:34
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3 participants

@miss-islington @ericsnowcurrently @bedevere-bot
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