Method materialize_to_heap

crates/vm/src/frame.rs:203–214

Migrate data-stack-backed storage to the heap, preserving all values. Returns the data stack base pointer for `DataStack::pop()`. Returns `None` if already heap-backed.

(&mut self)

    /// Returns the data stack base pointer for `DataStack::pop()`.
    /// Returns `None` if already heap-backed.
    fn materialize_to_heap(&mut self) -> Option<*mut u8> {
        if let LocalsPlusData::DataStack { ptr, capacity } = &self.data {
            let base = *ptr as *mut u8;
            let heap_data = unsafe { core::slice::from_raw_parts(*ptr, *capacity) }
                .to_vec()
                .into_boxed_slice();
            self.data = LocalsPlusData::Heap(heap_data);
            Some(base)
        } else {
            None
        }
    }

    /// Drop all contained values without freeing the backing storage.
    fn drop_values(&mut self) {