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Title: gh-120321: Make gi_frame_state transitions atomic in FT build by colesbury · Pull Request #142599 · python/cpython · GitHub

Open Graph Title: gh-120321: Make gi_frame_state transitions atomic in FT build by colesbury · Pull Request #142599 · python/cpython

X Title: gh-120321: Make gi_frame_state transitions atomic in FT build by colesbury · Pull Request #142599 · python/cpython

Description: This makes generator frame state transitions atomic in the free threading build, which avoids segfaults when trying to execute a generator from multiple threads concurrently. There are still a few operations that aren't thread-safe and may crash if performed concurrently on the same generator/coroutine: Accessing gi_yieldfrom/cr_await/ag_await Accessing gi_frame/cr_frame/ag_frame Async generator operations Issue: gh-120321

Open Graph Description: This makes generator frame state transitions atomic in the free threading build, which avoids segfaults when trying to execute a generator from multiple threads concurrently. There are still a few ...

X Description: This makes generator frame state transitions atomic in the free threading build, which avoids segfaults when trying to execute a generator from multiple threads concurrently. There are still a few ...

Opengraph URL: https://github.com/python/cpython/pull/142599

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bc054db gh-120321: Make gi_frame_state transitions atomic in FT build colesbury Dec 2, 2025 https://github.com/python/cpython/pull/142599/commits/bc054db9aa6d42c34acad0648054c582673f94ab
77fee35 Add some tests colesbury Dec 12, 2025 https://github.com/python/cpython/pull/142599/commits/77fee3579c3b26e705603a1430e726308727729f
1236692 Merge branch 'main' into gh-120321-gen-atomic colesbury Dec 12, 2025 https://github.com/python/cpython/pull/142599/commits/123669254a4d8030f542adf770d56e23a16cfe4c
ac3974d Remove unused import colesbury Dec 12, 2025 https://github.com/python/cpython/pull/142599/commits/ac3974df0bef87b3471c6226d5d7f22dd071af32
b285594 Update Objects/genobject.c colesbury Dec 15, 2025 https://github.com/python/cpython/pull/142599/commits/b285594849a5ed197bed1edba4ed563749f7270e
9c1c0fe Update Objects/genobject.c colesbury Dec 15, 2025 https://github.com/python/cpython/pull/142599/commits/9c1c0fe9ccf24d2f3afedc7415145afcfbf05460
3876dd0 Changes from review colesbury Dec 15, 2025 https://github.com/python/cpython/pull/142599/commits/3876dd0d4b780812f455a5a6121e296e23868064
46a8699 Merge branch 'main' into gh-120321-gen-atomic colesbury Dec 15, 2025 https://github.com/python/cpython/pull/142599/commits/46a8699e93323def185af38150422c7d3aaa69a1
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15c2604 Merge branch 'main' into gh-120321-gen-atomic colesbury Dec 16, 2025 https://github.com/python/cpython/pull/142599/commits/15c2604c4d57775aca1c5c54cab9fb329e653ee9
64155ab Rename _Py_GEN_SET_FRAME_STATE to _Py_GEN_TRY_SET_FRAME_STATE colesbury Dec 16, 2025 https://github.com/python/cpython/pull/142599/commits/64155ab438951cdb008196b4d9f7db5cd867d84e
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f532899 Merge branch 'main' into gh-120321-gen-atomic colesbury Dec 17, 2025 https://github.com/python/cpython/pull/142599/commits/f5328993dd5d5c0c941e221153bbef24471e8d9b
4b82b8c Rename field to generator_return_kind colesbury Dec 17, 2025 https://github.com/python/cpython/pull/142599/commits/4b82b8cbe566dae85aaf93ff885e8c861c207475
832e413 Set generator_return_kind in clear_gen_frame colesbury Dec 17, 2025 https://github.com/python/cpython/pull/142599/commits/832e413a9a92a4f3d8abb06ef2ce4326a1aa88c6
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