Struct swap::userfaultfd::DeadUffdCheckerImpl

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pub struct DeadUffdCheckerImpl {
    dummy_mmap: MemoryMapping,
}
Expand description

Check whether the process for the Userfaultfd is dead or not.

DeadUffdCheckerImpl uses UFFD_ZERO on a dummy mmap page to check the liveness.

This must keep alive on the main process to make the dummy mmap present in all descendant processes.

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§dummy_mmap: MemoryMapping

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impl DeadUffdChecker for DeadUffdCheckerImpl

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fn register(&self, uffd: &Userfaultfd) -> Result<()>

Register the Userfaultfd
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fn is_dead(&self, uffd: &Userfaultfd) -> bool

Check whether the Userfaultfd is dead or not.
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fn reset(&self) -> Result<()>

Free the internal state.

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