Constant UNWIND_POLL_FNS 

pub const UNWIND_POLL_FNS: &[&str];

C functions a handler panic may pass through, checked by reading the Aeron C source: they save the position only after the handler returns, so the next poll redelivers from the last saved position. Not derivable from the headers. Any other C function gets trampolines that catch the panic, so a missing entry is safe, just not zero cost