fix(spinlock): bound OptionalSharedLockGuard spin in signal handler paths#572

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jb/bounded-optional-shared-lock

Commits on Jun 2, 2026

fix(spinlock): bound shared lock acquisition in signal handler paths

jbachorik
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claude
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fix(spinlock): use atomic loads in unlock/unlockShared asserts

jbachorik
and
claude
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fix(jfr): count samples dropped when rec_lock acquisition fails

jbachorik
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claude
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