hotspot/test/testlibrary_tests/RedefineClassTest.java
author alanb
Tue, 03 May 2016 09:11:31 +0100
changeset 37827 09fa0c82a5f7
parent 30604 b8d532cb6420
child 38152 80e5da81fb2c
permissions -rw-r--r--
8154956: Module system implementation refresh (4/2016) Reviewed-by: alanb, mchung, chegar, redestad Contributed-by: alan.bateman@oracle.com, erik.joelsson@oracle.com
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/*
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 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @library /testlibrary
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 * @summary Proof of concept test for RedefineClassHelper
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 * @modules java.compiler
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 *          java.instrument
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 *          jdk.jartool/sun.tools.jar
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 * @build RedefineClassHelper
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 * @run main RedefineClassHelper
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 * @run main/othervm -javaagent:redefineagent.jar RedefineClassTest
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 */
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import static jdk.test.lib.Asserts.*;
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import jdk.test.lib.*;
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/*
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 * Proof of concept test for the test utility class RedefineClassHelper
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 */
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public class RedefineClassTest {
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    public static String newClass = "class RedefineClassTest$A { public int Method() { return 2; } }";
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    public static void main(String[] args) throws Exception {
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        A a = new A();
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        assertTrue(a.Method() == 1);
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        RedefineClassHelper.redefineClass(A.class, newClass);
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        assertTrue(a.Method() == 2);
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    }
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    static class A {
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        public int Method() {
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            return 1;
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        }
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    }
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}