test_xrayLargeTypedArray.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=1674777

-->

<head>

  <meta charset="utf-8">

  <title>Test for Bug 1674777</title>

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="chrome://global/skin"/>

  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>

  <script type="application/javascript">

/** Test for Bug 1674777 **/

function go() {

    SimpleTest.waitForExplicitFinish();

    let win = document.getElementById('ifr').contentWindow;

    const nbytes = 3 * 1024 * 1024 * 1024; // 3 GB.

    let tarray = new win.Int8Array(nbytes);

    ok(Cu.isXrayWrapper(tarray), "Should be Xray");

    is(tarray.length, nbytes, "Length should match");

    is(tarray.byteLength, nbytes, "byteLength should match");

    // Expect OOM when getting all property names.

    let ex;

    try {

        Object.getOwnPropertyNames(tarray);

    } catch (e) {

        ex = e;

    is(ex, "out of memory", "Expected OOM");

    SimpleTest.finish();

  </script>

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1674777">Mozilla Bug 1674777</a>

<iframe id="ifr" onload="go();" src="http://example.org/tests/js/xpconnect/tests/mochitest/file_empty.html" />

</body>

</html>