shared-memory-worker-gc.js 958 Bytes
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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

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// Flags: --experimental-wasm-threads --expose-gc
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const kNumMessages = 1000;
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function AllocMemory(pages = 1, max = pages) {
  return new WebAssembly.Memory({initial : pages, maximum : max, shared : true});
}

(function RunTest() {
  let worker = new Worker(
`onmessage =
   function(msg) {
     if (msg.memory) postMessage({memory : msg.memory});
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     gc();
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}`, {type : 'string'});

  let time = performance.now();

  for (let i = 0; i < kNumMessages; i++) {
    let now = performance.now();
    print(`iteration ${i}, Δ = ${(now - time).toFixed(3)} ms`);
    time = now;

    let memory = AllocMemory();
    worker.postMessage({memory : memory});
    let msg = worker.getMessage();
    if (msg.memory) {
      assertInstanceof(msg.memory, WebAssembly.Memory);
    }
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    gc();
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  }
})();