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<!DOCTYPE html>
<meta charset="utf-8">
<title>SharedArrayBuffers, when cloned, do not give back the same object</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/#structuredserialize">
<link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="resources/test-sab.js"></script>
<div id="log"></div>
<script>
"use strict";
async_test(t => {
const testId = token();
const sab = new SharedArrayBuffer(1);
window.addEventListener("message", t.step_func(({ data }) => {
if (data.testId !== testId) {
return;
}
assertSABsHaveSameBackingBlock(sab, data.sab);
t.done();
}));
window.postMessage({ testId, sab }, "*");
}, "postMessaging to this window does not give back the same SharedArrayBuffer (but does use the same backing block)");
async_test(t => {
const testId = token();
const sab = new SharedArrayBuffer();
const worker = new Worker("../resources/echo-worker.js");
worker.addEventListener("message", t.step_func(({ data }) => {
if (data.testId !== testId) {
return;
}
assert_not_equals(data.sab, sab);
t.done();
}));
worker.postMessage({ testId, sab });
}, "postMessaging to a worker and back does not give back the same SharedArrayBuffer");
async_test(t => {
const testId = token();
const sab = new SharedArrayBuffer();
window.addEventListener("message", t.step_func(({ data }) => {
if (data.testId !== testId) {
return;
}
assert_not_equals(data.sab, sab);
t.done();
}));
const iframe = document.createElement("iframe");
iframe.onload = t.step_func(() => {
iframe.contentWindow.postMessage({ testId, sab }, "*");
});
iframe.src = "../resources/echo-iframe.html";
document.body.appendChild(iframe);
}, "postMessaging to an iframe and back does not give back the same SharedArrayBuffer");
</script>
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