2024-03-12 20:47:10 +01:00
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<html>
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<head>
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<title>Render Process Hang Test</title>
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<style>
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#loading {
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display: inline-block;
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width: 10px;
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height: 10px;
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border: 3px solid rgba(0,0,0,.3);
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border-radius: 50%;
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border-top-color: #000;
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animation: spin 1s ease-in-out infinite;
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-webkit-animation: spin 1s ease-in-out infinite;
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}
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@keyframes spin {
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to { -webkit-transform: rotate(360deg); }
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}
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@-webkit-keyframes spin {
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to { -webkit-transform: rotate(360deg); }
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}
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#hangtime {
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width: 40px;
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}
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</style>
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<script language="JavaScript">
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function setFormEnabled(enabled) {
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var elements = document.getElementById("form").elements;
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for (var i = 0, element; element = elements[i++]; ) {
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element.disabled = !enabled;
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}
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}
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function updateTime() {
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document.getElementById('time').innerText = new Date().toLocaleString();
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}
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function setupTest() {
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// Retrieve the currently configured command.
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// Results in a call to the OnQuery method in hang_test.cc
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window.cefQuery({
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request: 'HangTest:getcommand',
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onSuccess: function(response) {
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document.getElementById(response).checked = true;
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setFormEnabled(true);
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},
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});
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}
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function setup() {
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// Disable all elements.
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setFormEnabled(false);
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updateTime();
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setInterval(updateTime, 1000);
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if (location.hostname == 'tests' || location.hostname == 'localhost') {
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setupTest();
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return;
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}
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alert('This page can only be run from tests or localhost.');
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}
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// Send a query to the browser process.
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function sendCommand(command) {
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// Set the configured command.
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// Results in a call to the OnQuery method in hang_test.cc
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window.cefQuery({
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request: 'HangTest:' + command
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});
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}
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// Hang the render process for the specified number of seconds.
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function triggerHang() {
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const delayMs = parseInt(document.getElementById('hangtime').value) * 1000;
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const startTime = performance.now();
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while(performance.now() - startTime < delayMs) {}
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}
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</script>
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</head>
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<form id="form">
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<body bgcolor="white" onload="setup()">
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<div>Use the below controls to trigger a render process hang.</div>
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<br/>
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<div>Hang for <input type="number" id="hangtime" min="1" max="99" step="1" value="20"/> seconds.</div>
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<br/>
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<div>Action after hanging for at least 15 seconds:</div>
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<br/>
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<div><input type="radio" name="command" id="default" value="default" onclick="sendCommand('setdefault')"/>
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2024-04-17 18:01:26 +02:00
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<label for="default">Default behavior (Alloy style: Wait; Chrome style: show "Page unresponsive" dialog [1])</label></div>
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2024-03-12 20:47:10 +01:00
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<div><input type="radio" name="command" id="wait" value="wait" onclick="sendCommand('setwait')"/>
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<label for="wait">Wait</label></div>
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<div><input type="radio" name="command" id="terminate" value="terminate" onclick="sendCommand('setterminate')"/>
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<label for="terminate">Terminate the render process [2]</label></div>
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<br/>
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<div>[1] The "Page unresponsive" dialog will be auto-dismissed when the hang ends.</div>
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<div>[2] After termination the browser navigates to the startup URL or shows an error page.</div>
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<br/>
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<div><input type="button" value="Trigger Hang" onclick="triggerHang()"/></div>
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</form>
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Observe page responsiveness:
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<br/><br/>
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<table><tr>
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<td valign="top">
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CSS:<br/><div id="loading"></div>
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</td>
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<td> </td>
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<td valign="top">
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JavaScript:<br/><div id="time"></div>
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</td>
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</tr></table>
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(JavaScript will stop updating during the hang)
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</body>
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</html>
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