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[3.13] gh-117657: Fix data races when writing / reading ob_gc_bits (GH-118292) #118796

Merged
merged 1 commit into from
May 8, 2024
Merged

[3.13] gh-117657: Fix data races when writing / reading ob_gc_bits (GH-118292) #118796

merged 1 commit into from
May 8, 2024

Commits on May 8, 2024

  1. pythongh-117657: Fix data races when writing / reading ob_gc_bits (p… 

    …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 <mpage@meta.com>
    @mpage @miss-islington
    mpage authored and miss-islington committed May 8, 2024
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