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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
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devtools/server/tests/mochitest/test_memory_allocations_04.html Normal file
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<!DOCTYPE HTML>
<html>
<!--
Bug 1068171 - Test controlling the memory actor's allocation sampling probability.
-->
<head>
<meta charset="utf-8">
<title>Memory monitoring actor test</title>
<script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
</head>
<body>
<pre id="test">
<script src="memory-helpers.js" type="application/javascript;version=1.8"></script>
<script>
window.onload = function() {
SimpleTest.waitForExplicitFinish();
Task.spawn(function* () {
var { memory, client } = yield startServerAndGetSelectedTabMemory();
yield memory.attach();
var allocs = [];
function allocator() {
for (var i = 0; i < 100; i++) {
allocs.push({});
}
}
var testProbability = Task.async(function* (p, expected) {
info("probability = " + p);
yield memory.startRecordingAllocations({
probability: p
});
allocator();
var response = yield memory.getAllocations();
yield memory.stopRecordingAllocations();
return response.allocations.length;
});
is((yield testProbability(0.0)), 0,
"With probability = 0.0, we shouldn't get any allocations.");
ok((yield testProbability(1.0)) >= 100,
"With probability = 1.0, we should get all 100 allocations (plus "
+ "whatever allocations the actor and SpiderMonkey make).");
// We don't test any other probabilities because the test would be
// non-deterministic. We don't have a way to control the PRNG like we do in
// jit-tests
// (js/src/jit-test/tests/debug/Memory-allocationsSamplingProbability-*.js).
yield memory.detach();
destroyServerAndFinish(client);
});
};
</script>
</pre>
</body>
</html>