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Fix thread-safety in GC, type cache, and instruction cache #7355

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Merged
youknowone merged 6 commits into from
Mar 5, 2026
Merged

Fix thread-safety in GC, type cache, and instruction cache #7355

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70169e8
Fix thread-safety in GC, type cache, and instruction cache
youknowone Mar 5, 2026
b0ad917
Fix RLock _acquire_restore tuple handling and unxfail threading test
youknowone Mar 5, 2026
de01099
Align type cache seqlock writer protocol with CPython
youknowone Mar 5, 2026
8683977
RLock: use single parking_lot level, track recursion manually
youknowone Mar 5, 2026
3e31d22
Add try_to_owned_from_ptr to avoid &PyObject on stale ptrs
youknowone Mar 5, 2026
b3de227
Fix CI: spelling typo and xfail flaky test_thread_safety
youknowone Mar 5, 2026
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Fix RLock _acquire_restore tuple handling and unxfail threading test
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@youknowone
youknowone committed Mar 5, 2026
commit b0ad91788104f6489804f0d8625b85b258d9de8d
1 change: 0 additions & 1 deletion Lib/test/test_threading.py
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Expand Up @@ -2141,7 +2141,6 @@ def __init__(self, a, *, b) -> None:
CustomRLock(1, b=2)
self.assertEqual(warnings_log, [])

@unittest.expectedFailure # TODO: RUSTPYTHON
def test_release_save_unacquired(self):
return super().test_release_save_unacquired()

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13 changes: 10 additions & 3 deletions crates/vm/src/stdlib/thread.rs
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Expand Up @@ -292,16 +292,23 @@ pub(crate) mod _thread {
}

#[pymethod]
fn _acquire_restore(&self, state: (usize, u64), _vm: &VirtualMachine) {
let (count, _owner) = state;
fn _acquire_restore(&self, state: PyTupleRef, vm: &VirtualMachine) -> PyResult<()> {
let [count_obj, owner_obj] = state.as_slice() else {
return Err(
vm.new_type_error("_acquire_restore() argument 1 must be a 2-item tuple")
);
};
let count: usize = count_obj.clone().try_into_value(vm)?;
let _owner: u64 = owner_obj.clone().try_into_value(vm)?;
if count == 0 {
return;
return Ok(());
}
for _ in 0..count {
self.mu.lock();
}
self.count
.store(count, core::sync::atomic::Ordering::Relaxed);
Ok(())
}

#[pymethod]
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