Function with_vm

compiler/src/main/mod.rs:132–136

(f: impl FnOnce(&mut VM<'static>) -> R)

}

pub(super) fn with_vm<R>(f: impl FnOnce(&mut VM<'static>) -> R) -> Option<R> {
    // Drop the runtime borrow before `f`, VM dispatch re-enters `with_runtime`.
    let ptr = with_runtime(|rt| rt.current_vm)?;
    Some(f(unsafe { &mut *ptr.as_ptr() }))
}

/* Builds a `&[u8]` from an FFI `(ptr, len)`, empty on null or zero length, `from_raw_parts` would UB on either. */
pub(super) unsafe fn safe_bytes<'a>(ptr: *const u8, len: u32) -> &'a [u8] {