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Title: Fix thread-safety in GC, type cache, and instruction cache by youknowone · Pull Request #7355 · RustPython/RustPython · GitHub

Open Graph Title: Fix thread-safety in GC, type cache, and instruction cache by youknowone · Pull Request #7355 · RustPython/RustPython

X Title: Fix thread-safety in GC, type cache, and instruction cache by youknowone · Pull Request #7355 · RustPython/RustPython

Description: Summary by CodeRabbit Bug Fixes Tightened reference-count and ownership checks to reduce use-after-free and TOCTOU races. Safer GC and callback collection paths to avoid torn weak references. Improved inline-cache and attribute access guards to prevent stale references. New Features Pointer-sized atomic cache support for runtime caches. SeqLock-based method cache protocol for stronger cache invalidation. RLock state save/restore helpers for context switches. Other Dict-keys now handled via the generic iterable path.

Open Graph Description: Summary by CodeRabbit Bug Fixes Tightened reference-count and ownership checks to reduce use-after-free and TOCTOU races. Safer GC and callback collection paths to avoid torn weak references. Im...

X Description: Summary by CodeRabbit Bug Fixes Tightened reference-count and ownership checks to reduce use-after-free and TOCTOU races. Safer GC and callback collection paths to avoid torn weak references. Im...

Opengraph URL: https://github.com/RustPython/RustPython/pull/7355

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70169e8 Fix thread-safety in GC, type cache, and instruction cache youknowone Mar 5, 2026 https://github.com/RustPython/RustPython/pull/7355/commits/70169e8858fa7062a1b0dcc244688ef2fc39b377
b0ad917 Fix RLock _acquire_restore tuple handling and unxfail threading test youknowone Mar 5, 2026 https://github.com/RustPython/RustPython/pull/7355/commits/b0ad91788104f6489804f0d8625b85b258d9de8d
de01099 Align type cache seqlock writer protocol with CPython youknowone Mar 5, 2026 https://github.com/RustPython/RustPython/pull/7355/commits/de010994143681b51d739e7dacad70c352ff2490
8683977 RLock: use single parking_lot level, track recursion manually youknowone Mar 5, 2026 https://github.com/RustPython/RustPython/pull/7355/commits/8683977378340ee67501bb85d997b8407e440aaa
3e31d22 Add try_to_owned_from_ptr to avoid &PyObject on stale ptrs youknowone Mar 5, 2026 https://github.com/RustPython/RustPython/pull/7355/commits/3e31d2230fbee85d8222c65b6587f3e91aba1de5
b3de227 Fix CI: spelling typo and xfail flaky test_thread_safety youknowone Mar 5, 2026 https://github.com/RustPython/RustPython/pull/7355/commits/b3de227e0a47007e8676382306d18d2c09ce457f
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