Java example source code file (JDK-8020809.js)

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The JDK-8020809.js Java example source code

/*
 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 * 
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 * 
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/**
 * JDK-8020809: Java adapter should not allow overriding of caller sensitive methods
 * 
 * @test
 * @run
 */

// This test runs as trusted as we need the
// "enableContextClassLoaderOverride" runtime permission.

var T = Java.extend(java.lang.Thread, {
    getContextClassLoader: function() {
        // Since getContextClassLoader is caller sensitive, this won't
        // actually act as an override; it will be ignored. If we could
        // invoke it, it would be an error.
        throw new Error()
    }
})

// Retrieve the context ClassLoader on our Thread adapter, ensure the
// method was not, in fact, overridden.
var cl = (new T()).contextClassLoader

print("cl is class loader: "  + (cl instanceof java.lang.ClassLoader))