src/third_party/WebKit/LayoutTests/inspector-protocol/debugger/debugger-pause-in-tight-loop.html

   1 <html>
   2 <head>
   3 <script type="text/javascript" src="../../http/tests/inspector-protocol/inspector-protocol-test.js"></script>
   4 <script>
   5
   6 function testFunction()
   7 {
   8     setTimeout(hotFunction, 0);
   9 }
  10
  11 var terminated = false;
  12 function hotFunction() {
  13   evaluateInFrontend("InspectorTest.didFireTimer()");
  14
  15   var message_id = 1;
  16   var ts = Date.now();
  17   while (!terminated) {
  18       // Without this try/catch v8 will optimize the function and break will not work.
  19       try {
  20           if (Date.now() - ts > 1000) {
  21               ts = Date.now();
  22               console.error("Message #" + message_id++);
  23           }
  24       } catch (e) {
  25       }
  26   }
  27 }
  28
  29 function test()
  30 {
  31     InspectorTest.sendCommand("Inspector.enable", {});
  32     InspectorTest.sendCommand("Debugger.enable", {}, didEnableDebugger);
  33     function didEnableDebugger()
  34     {
  35         // Start tight loop in page.
  36         InspectorTest.sendCommand("Runtime.evaluate", { "expression": "testFunction()" }, didEval);
  37         function didEval()
  38         {
  39             InspectorTest.log("didEval");
  40         }
  41     }
  42
  43     InspectorTest.didFireTimer = function()
  44     {
  45         InspectorTest.log("didFireTimer");
  46         InspectorTest.sendCommand("Debugger.pause", { });
  47     }
  48
  49     InspectorTest.eventHandler["Debugger.paused"] = function(messageObject)
  50     {
  51         var message = messageObject["params"]["message"];
  52         InspectorTest.log("SUCCESS: Paused");
  53         InspectorTest.sendCommand("Runtime.evaluate", { "expression": "terminated = true;" });
  54         InspectorTest.sendCommand("Debugger.resume", { });
  55         InspectorTest.completeTest();
  56     }
  57 }
  58 </script>
  59 </head>
  60 <body onLoad="runTest();">
  61 </body>
  62 </html>