test_spectre_mitigations.html

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<!DOCTYPE html>

<html>

<head>

  <meta charset="utf-8">

  <title>Tests for Spectre mitigations</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

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

</head>

<body>

<script>

add_task(async function() {

  const { Cu } = SpecialPowers;

  const options = Cu.getJSTestingFunctions().getJitCompilerOptions();

  const testMitigation = function(name) {

    let val = options[name];

    ok(val === 0 || val === 1, "must be valid JitOption");

    is(Boolean(val), !SpecialPowers.useRemoteSubframes, "must be enabled if Fission is disabled");

};

  testMitigation("spectre.index-masking");

  testMitigation("spectre.object-mitigations");

  testMitigation("spectre.string-mitigations");

  testMitigation("spectre.value-masking");

});

</script>

</body>

</html>