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GeezerVison is showing github.com — [3.13] gh-117657: Fix data races when writing / reading `ob_gc_bits` (GH-118292) by miss-islington · Pull Request #118796 · python/cpython

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@miss-islington

@miss-islington miss-islington commented May 8, 2024 •
edited by bedevere-app Bot
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Use relaxed atomics when reading / writing to the field. There are still a
few places in the GC where we do not use atomics. Those should be safe as
the world is stopped.
(cherry picked from commit cb6f75a)

Co-authored-by: mpage [email protected]

  • Issue: Make TSAN tests pass with the GIL disabled in free-threaded builds #117657

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@mpage @miss-islington
pythongh-117657: Fix data races when writing / reading ob_gc_bits (p…
a54b1d7
…ythonGH-118292)

Use relaxed atomics when reading / writing to the field. There are still a
few places in the GC where we do not use atomics. Those should be safe as
the world is stopped.
(cherry picked from commit cb6f75a)

Co-authored-by: mpage <[email protected]>
@bedevere-app bedevere-app Bot added the awaiting review label May 8, 2024
@bedevere-app bedevere-app Bot mentioned this pull request May 8, 2024
Make TSAN tests pass with the GIL disabled in free-threaded builds #117657
Closed
@bedevere-app bedevere-app Bot added the skip news label May 8, 2024
@bedevere-app bedevere-app Bot mentioned this pull request May 8, 2024
gh-117657: Fix data races when writing / reading ob_gc_bits #118292
Merged
@colesbury
colesbury enabled auto-merge (squash) May 8, 2024 20:08
@colesbury
colesbury merged commit 7b9ca26 into python:3.13 May 8, 2024
@bedevere-app bedevere-app Bot removed the awaiting review label May 8, 2024
@JelleZijlstra JelleZijlstra mentioned this pull request May 28, 2024
backport a9a74da 3.13 #119642
Closed
@miss-islington
miss-islington deleted the backport-cb6f75a-3.13 branch January 2, 2026 18:44
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3 participants

@miss-islington @colesbury @mpage
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