test/jdk/java/lang/instrument/RedefineInterfaceMethods/RedefineInterfaceMethods.java - master - githubmirror/jdk22

test/jdk/java/lang/instrument/RedefineInterfaceMethods/RedefineInterfaceMethods.java

82 строки3 KB

Ioi Lam

8235970: [TESTBUG] Remove dependency of sun.tools.jar from RedefineClassHelper

16 дек 2019, 21:04

16 дек 2019, 21:041b4b652

/*
 * Copyright (c) 2019, 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.
 */

/*
 * @test
 * @bug 8225325
 * @summary Add tests for redefining a class' private method during resolution of the bootstrap specifier
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 * @modules java.compiler
 *          java.instrument
 * @compile ../NamedBuffer.java
 * @compile redef/Xost.java
 * @run main RedefineClassHelper
 * @run main/othervm -javaagent:redefineagent.jar -Xlog:redefine+class*=trace RedefineInterfaceMethods
 */

class Host {
    static void log(String msg) { System.out.println(msg); }

    static interface B {
        int ORIGINAL_RETURN = 1;
        int NEW_RETURN = 2;

        private int privateMethod() {
            Runnable race1 = () -> log("Hello from inside privateMethod");
            race1.run();
            return ORIGINAL_RETURN;
        }

        public default int defaultMethod(String p) {
            log(p + "from interface B's defaultMethod");
            return privateMethod();
        }
    }

    static class Impl implements B {
    }
}

public class RedefineInterfaceMethods {
    private static byte[] bytesForHostClass(char replace) throws Throwable {
        return NamedBuffer.bytesForHostClass(replace, "Host$B");
    }

    public static void main(String[] args) throws Throwable {
        Host.Impl impl = new Host.Impl();

        int res = impl.defaultMethod("Hello ");
        if (res != Host.B.ORIGINAL_RETURN)
            throw new Error("defaultMethod returned " + res +
                            " expected " + Host.B.ORIGINAL_RETURN);

        byte[] buf = bytesForHostClass('X');
        RedefineClassHelper.redefineClass(Host.B.class, buf);

        res = impl.defaultMethod("Goodbye ");
        if (res != Host.B.NEW_RETURN)
            throw new Error("defaultMethod returned " + res +
                            " expected " + Host.B.NEW_RETURN);
    }
}