LayoutTests/fast/workers/wrapper-map-gc.html - WebKit - Git at Google

 <script>
 function test()
 {
     if (window.testRunner) {
         testRunner.dumpAsText();
         testRunner.waitUntilDone();
     }

     var counter = 0;
     var worker = new Worker("resources/wrapper-map-gc.js");

     // Post the message from worker back to the worker.
     // This will fire another onmessage event in the Worker and allocate more data.
     worker.onmessage = function(evt)
     {
         worker.postMessage(evt.data);
         // This appears to be enough to reliably trigger GC in a Worker (about 20Mb strings allocated).
         if (++counter > 20) {
             document.getElementById("result").innerText = "PASS";
             worker.terminate();
             if (window.testRunner) {
                 testRunner.notifyDone();
             }
         }
     }
 }
 </script>
 <body onload=test()>
 <p>This test tries to cause GC in Worker context. It also fires events in the Worker, which allocates JS DOM Wrappers for Event object. As a result of GC, the maps that map wrappers to DOM Objects will be cleaned up. Test succeeds if it does not crash and prints 'PASS' at the end.</p>
 <pre id="result"></pre>
 </body>
 </html>
	<script>
	function test()
	{
	if (window.testRunner) {
	testRunner.dumpAsText();
	testRunner.waitUntilDone();
	}

	var counter = 0;
	var worker = new Worker("resources/wrapper-map-gc.js");

	// Post the message from worker back to the worker.
	// This will fire another onmessage event in the Worker and allocate more data.
	worker.onmessage = function(evt)
	{
	worker.postMessage(evt.data);
	// This appears to be enough to reliably trigger GC in a Worker (about 20Mb strings allocated).
	if (++counter > 20) {
	document.getElementById("result").innerText = "PASS";
	worker.terminate();
	if (window.testRunner) {
	testRunner.notifyDone();
	}
	}
	}
	}
	</script>
	<body onload=test()>
	<p>This test tries to cause GC in Worker context. It also fires events in the Worker, which allocates JS DOM Wrappers for Event object. As a result of GC, the maps that map wrappers to DOM Objects will be cleaned up. Test succeeds if it does not crash and prints 'PASS' at the end.</p>
	<pre id="result"></pre>
	</body>
	</html>