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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>