Method local

crates/wasmtime/src/runtime/debug.rs:585–595

Get the type and value of the given local in this frame. # Panics Panics if the index is out-of-range (greater than `num_locals()`).

(&self, mut store: impl AsContextMut, index: u32)

    /// Panics if the index is out-of-range (greater than
    /// `num_locals()`).
    pub fn local(&self, mut store: impl AsContextMut, index: u32) -> Result<Val> {
        let store = store.as_context_mut();
        let frame_data = self.frame_data(store.0.as_store_opaque())?;
        let (offset, ty) = frame_data.locals[usize::try_from(index).unwrap()];
        let slot_addr = frame_data.slot_addr(self.cursor.frame().fp());
        // SAFETY: compiler produced metadata to describe this local
        // slot and stored a value of the correct type into it. Slot
        // address is valid because we checked liveness of the
        // activation/frame via `frame_data` above.
        Ok(unsafe { read_value(store.0.as_store_opaque(), slot_addr, offset, ty) })
    }

    /// Get the type and value of the given operand-stack value in
    /// this frame.