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Title: gh-127266: avoid data races when updating type slots v2 by nascheme · Pull Request #133177 · python/cpython · GitHub

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Open Graph Description: This is an updated version of GH-131174, which was reverted. I figured the cleanest thing to do is make a new PR. This is the same as the previous PR with the following additional change. The upda...

X Description: This is an updated version of GH-131174, which was reverted. I figured the cleanest thing to do is make a new PR. This is the same as the previous PR with the following additional change. The upda...

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gh-127266: avoid data races when updating type slots v2https://github.com/python/cpython/pull/133177#top
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For update_all_slots(), do updates more safely.https://github.com/python/cpython/pull/133177/commits/f447ce4adf750b9da15011e30eaf8aee3fd7b478
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Type slots are not thread-safe in free-threaded builds #127266 https://github.com/python/cpython/issues/127266
https://github.com/nascheme
Avoid "empty structure" compile error.https://github.com/python/cpython/pull/133177/commits/d511ca6015e8a95c4f0f8c76330a8b57e3e1060c
d511ca6https://github.com/python/cpython/pull/133177/commits/d511ca6015e8a95c4f0f8c76330a8b57e3e1060c
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April 29, 2025 22:40https://github.com/python/cpython/pull/133177#commits-pushed-5e38497
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Use apply_slot_updates() for type_setattro().https://github.com/python/cpython/pull/133177/commits/5e38497b323fdb828d61a0a965841f07086edbcc
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Merge 'origin/main' into type-slot-ts-v2https://github.com/python/cpython/pull/133177/commits/e9516c7a7685f2bd73d005af9a69ab6c52a7a5a2
e9516c7https://github.com/python/cpython/pull/133177/commits/e9516c7a7685f2bd73d005af9a69ab6c52a7a5a2
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Reduce number of items in test for slot updates.https://github.com/python/cpython/pull/133177/commits/8c74a0c2e29ca8d4afadca8346eed685811943ca
8c74a0chttps://github.com/python/cpython/pull/133177/commits/8c74a0c2e29ca8d4afadca8346eed685811943ca
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Add TSAN suppression for _Py_slot_tp_getattr_hook.https://github.com/python/cpython/pull/133177/commits/6cd7644c99c2980c9f054d6bd77b2d8e39cb0dee
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Queue update of tp_flags as well.https://github.com/python/cpython/pull/133177/commits/3cb225610df2ff9c89b6ec7a27bfc630a1420939
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Performance, skip stop-the-world when possible.https://github.com/python/cpython/pull/133177/commits/47e41c9896587cbfc5a9c6ad5d37a5b95cf16051
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Merge 'origin/main' into type-slot-ts-v2https://github.com/python/cpython/pull/133177/commits/cb848f117b0145b386d8f1b4fbc8710248456203
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Always clear version after __bases__ update.https://github.com/python/cpython/pull/133177/commits/9859ebf50986977b116d58f98ae81b054f04844c
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Merge 'origin/main' into type-slot-ts-v2https://github.com/python/cpython/pull/133177/commits/6c74cacf2162924f82552c414f1300d0d12c7be0
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Add test for assigning __bases__.https://github.com/python/cpython/pull/133177/commits/583c435df6179ba6675fa3274bab6bfcfbcf9862
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Avoid releasing TYPE_LOCK when stopping the world.https://github.com/python/cpython/pull/133177/commits/c01707e839116fb0a87d82ac6d66d1c288888d47
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Bug fix for type_lock_prevent_release().https://github.com/python/cpython/pull/133177/commits/3f6222b70eb3751ff309f9a56d5cbae92b1ac6b9
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Merge 'origin/main' into type-slot-ts-v2https://github.com/python/cpython/pull/133177/commits/6f218fb5ced903a936a5f447f89ced776a496331
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