JSTests/wasm/references/memory_fill_shared.js

import * as assert from '../assert.js';
import { instantiate } from "../wabt-wrapper.js";

async function test() {
  let wat = `
  (module
    (import "env" "memory" (memory $mem0 1 7 shared))
    (func (export "do_fill")
      (memory.fill (i32.const 1) (i32.const 37) (i32.const 3))
    )
    (func (export "get") (param $address i32) (result i32)
      (i32.load8_u (local.get $address))
    )
  )
  `;

  let memory = new WebAssembly.Memory({initial: 1, maximum: 7, shared: true});
  const instance = await instantiate(wat, {env: {"memory": memory}}, {reference_types: true});

  assert.eq(instance.exports.get(0), 0);
  assert.eq(instance.exports.get(1), 0);
  assert.eq(instance.exports.get(2), 0);
  assert.eq(instance.exports.get(3), 0);
  assert.eq(instance.exports.get(4), 0);

  instance.exports.do_fill();

  assert.eq(instance.exports.get(0), 0);
  assert.eq(instance.exports.get(1), 37);
  assert.eq(instance.exports.get(2), 37);
  assert.eq(instance.exports.get(3), 37);
  assert.eq(instance.exports.get(4), 0);
}

assert.asyncTest(test());