Function wasmtime_runtime::catch_unwind_and_longjmp

pub unsafe fn catch_unwind_and_longjmp<R>(f: impl FnOnce() -> R) -> R

Invokes the closure f and returns the result.

If f panics and this crate is compiled with panic=unwind this will catch the panic and capture it to “throw” with longjmp to be caught by the nearest setjmp. The panic will then be resumed from where it is caught.

Safety

Only safe to call when wasm code is on the stack, aka catch_traps must have been previously called. Additionally no Rust destructors can be on the stack. They will be skipped and not executed in the case that f panics.