clear_after_fork #6933
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clear_after_fork #6933
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📝 WalkthroughWalkthroughAdds post-fork cleanup routines for signal state, wakeup file descriptors, and weakref locks. These functions reset inherited parent state in child processes before Python code execution, preventing stale parent signals and locks from interfering with child process behavior. Changes
Sequence DiagramsequenceDiagram
participant Fork Process
participant Child Init as py_os_after_fork_child()
participant Signal Module
participant Signal FD Module
participant Weakref Module
Fork Process->>Child Init: fork() → child process starts
Child Init->>Signal Module: clear_after_fork()
Signal Module->>Signal Module: reset ANY_TRIGGERED & TRIGGERS
Signal Module-->>Child Init: ✓ signal state cleared
Child Init->>Signal FD Module: clear_wakeup_fd_after_fork()
Signal FD Module->>Signal FD Module: reset WAKEUP to INVALID_WAKEUP
Signal FD Module-->>Child Init: ✓ wakeup fd cleared
Child Init->>Weakref Module: reset_weakref_locks_after_fork()
Weakref Module->>Weakref Module: reset all stripe locks
Weakref Module-->>Child Init: ✓ weakref locks cleared
Child Init->>Child Init: run after_fork_child(vm)
Child Init-->>Fork Process: child initialized & ready
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Possibly related PRs
Poem
🚥 Pre-merge checks | ✅ 3✅ Passed checks (3 passed)
✏️ Tip: You can configure your own custom pre-merge checks in the settings. ✨ Finishing touches
🧪 Generate unit tests (beta)
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