Function grow

deps/v8/test/mjsunit/wasm/memory64.js:210–214

(arg)

  let instance = builder.instantiate();
  function grow(arg) {
    instance.exports.grow(arg);
    let i64_arr = new BigInt64Array(instance.exports.memory.buffer, 0, 1);
    return i64_arr[0];
  }

  assertEquals(1n, grow(2n));
  assertEquals(3n, grow(1n));