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Title: [3.13] gh-127521: Mark list as "shared" before resizing if necessary (GH-127524) by miss-islington · Pull Request #127533 · python/cpython · GitHub

Open Graph Title: [3.13] gh-127521: Mark list as "shared" before resizing if necessary (GH-127524) by miss-islington · Pull Request #127533 · python/cpython

X Title: [3.13] gh-127521: Mark list as "shared" before resizing if necessary (GH-127524) by miss-islington · Pull Request #127533 · python/cpython

Description: In the free threading build, if a non-owning thread resizes a list, it must use QSBR to free the old list array because there may be a concurrent access (without a lock) from the owning thread. To match the pattern in dictobject.c, we just mark the list as "shared" before resizing if it's from a non-owning thread and not already marked as shared. (cherry picked from commit c7dec02) Co-authored-by: Sam Gross colesbury@gmail.com Issue: gh-127521

Open Graph Description: In the free threading build, if a non-owning thread resizes a list, it must use QSBR to free the old list array because there may be a concurrent access (without a lock) from the owning thread. To ...

X Description: In the free threading build, if a non-owning thread resizes a list, it must use QSBR to free the old list array because there may be a concurrent access (without a lock) from the owning thread. To ...

Opengraph URL: https://github.com/python/cpython/pull/127533

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[3.13] gh-127521: Mark list as "shared" before resizing if necessary (GH-127524) https://github.com/python/cpython/pull/127533/files#top
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e46b077 gh-127521: Mark list as "shared" before resizing if necessary (GH-127… colesbury Dec 2, 2024 https://github.com/python/cpython/pull/127533/commits/e46b077f6abeaf01f48f194df284f1b800962514
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