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Title: gh-127266: avoid data races when updating type slots by nascheme · Pull Request #131174 · python/cpython · GitHub

Open Graph Title: gh-127266: avoid data races when updating type slots by nascheme · Pull Request #131174 · python/cpython

X Title: gh-127266: avoid data races when updating type slots by nascheme · Pull Request #131174 · python/cpython

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Open Graph Description: Avoid data races when updating type slots and type flags by "stopping-the-world" first. This is only needed if the type is potentially exposed to multiple threads. There are a couple pl...

X Description: Avoid data races when updating type slots and type flags by "stopping-the-world" first. This is only needed if the type is potentially exposed to multiple threads. There are a c...

Opengraph URL: https://github.com/python/cpython/pull/131174

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Type slots are not thread-safe in free-threaded builds #127266https://github.com/python/cpython/issues/127266
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wip: update type slots, stop-the-worldhttps://github.com/python/cpython/pull/131174/commits/0e995ad361ec91755581bb06693fba9d0bf6c49e
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Mar 13, 2025 https://github.com/python/cpython/pull/131174#ref-issue-2692244625
Type slots are not thread-safe in free-threaded builds #127266 https://github.com/python/cpython/issues/127266
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March 13, 2025 15:03https://github.com/python/cpython/pull/131174#commits-pushed-b173f17
https://github.com/nascheme
Remove unneeded atomics for tp_flags.https://github.com/python/cpython/pull/131174/commits/b173f1769c638f21c100e55aefc5e0e60cc84609
b173f17https://github.com/python/cpython/pull/131174/commits/b173f1769c638f21c100e55aefc5e0e60cc84609
https://github.com/nascheme
Use stop-the-world for tp_flag changes too.https://github.com/python/cpython/pull/131174/commits/d4ce112310c8bfe2683a2ccedc4323ec591c771f
d4ce112https://github.com/python/cpython/pull/131174/commits/d4ce112310c8bfe2683a2ccedc4323ec591c771f
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Mar 14, 2025https://github.com/python/cpython/pull/131174#issuecomment-2724899794
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March 14, 2025 11:54https://github.com/python/cpython/pull/131174#commits-pushed-44eb332
https://github.com/nascheme
Remove 'world_stops' and 'sys._get_world_stops'.https://github.com/python/cpython/pull/131174/commits/44eb332fd5754f00cdd7c30de890738e1167580e
44eb332https://github.com/python/cpython/pull/131174/commits/44eb332fd5754f00cdd7c30de890738e1167580e
https://github.com/nascheme
Improve code comments.https://github.com/python/cpython/pull/131174/commits/d132fab96784d297d30250d2c92c431651058ef2
d132fabhttps://github.com/python/cpython/pull/131174/commits/d132fab96784d297d30250d2c92c431651058ef2
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Remove TSAN suppressions that seem unneeded.https://github.com/python/cpython/pull/131174/commits/658bcd52ab4a85134bed94eb6f30ce94a03924f7
658bcd5https://github.com/python/cpython/pull/131174/commits/658bcd52ab4a85134bed94eb6f30ce94a03924f7
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Add NEWS file.https://github.com/python/cpython/pull/131174/commits/ef2f07b47475faeb631f8ac89f8bc4eec865e6ed
ef2f07bhttps://github.com/python/cpython/pull/131174/commits/ef2f07b47475faeb631f8ac89f8bc4eec865e6ed
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March 14, 2025 21:37https://github.com/python/cpython/pull/131174#event-16781112414
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Use mutex rather than critical sections.https://github.com/python/cpython/pull/131174/commits/ce8536db3f59037a44db845f148e9610dfd080ad
ce8536dhttps://github.com/python/cpython/pull/131174/commits/ce8536db3f59037a44db845f148e9610dfd080ad
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Merge 'origin/main' intohttps://github.com/python/cpython/pull/131174/commits/b97a4b4271069a4d5d53f1fd2c09e60612311fe4
pythongh-127266https://github.com/python/cpython/issues/127266
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Fix non-debug build.https://github.com/python/cpython/pull/131174/commits/ca00e74171ecbfce4b3dbf1b1b6b26f3db1ef776
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Improve comments.https://github.com/python/cpython/pull/131174/commits/6db454246303204720c25fe5b5784793d184e36d
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Merge 'origin/main' intohttps://github.com/python/cpython/pull/131174/commits/398ac148137982eab7f3b712211c9c72ac69d071
pythongh-127266https://github.com/python/cpython/issues/127266
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Invalidate type cache before calling watchers.https://github.com/python/cpython/pull/131174/commits/a81e9e395335c1cdf9e9ec41dcb1808d92836fba
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