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Mark cleanup cold

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Mark Rousskov 2019-12-26 10:54:24 -05:00 • committed by Amanieu d'Antras
parent dd6c3b7c39
commit bdcc02360f
1 changed files with 5 additions and 0 deletions
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5
src/libstd/panicking.rs
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@ -307,6 +307,11 @@ pub unsafe fn r#try<R, F: FnOnce() -> R>(f: F) -> Result<R, Box<dyn Any + Send>>
Err(cleanup(payload.assume_init())) Err(cleanup(payload.assume_init()))
}; };
// We consider unwinding to be rare, so mark this function as cold. However,
// do not mark it no-inline -- that decision is best to leave to the
// optimizer (in most cases this function is not inlined even as a normal,
// non-cold function, though, as of the writing of this comment).
#[cold]
unsafe fn cleanup(mut payload: Payload) -> Box<dyn Any + Send + 'static> { unsafe fn cleanup(mut payload: Payload) -> Box<dyn Any + Send + 'static> {
let obj = crate::mem::transmute(__rust_panic_cleanup(&mut payload as *mut _ as *mut u8)); let obj = crate::mem::transmute(__rust_panic_cleanup(&mut payload as *mut _ as *mut u8));
update_panic_count(-1); update_panic_count(-1);