/* * Copyright (c) 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. */ /* * @test * @bug 8015436 * @summary the IK _initial_method_idnum value must be adjusted if overpass methods are added * * @run main compiler.runtime.cr8015436.Test8015436 */ /* * The test checks that a MemberName for the defaultMethod() is cached in * the class MemberNameTable without a crash in the VM fastdebug mode. * The original issue was that the InstanceKlass _initial_method_idnum was * not adjusted properly when the overpass methods are added to the class. * The expected/correct behavior: The test does not crash nor throw any exceptions. * All the invocations of the defaultMethod() must be completed successfully. */ package compiler.runtime.cr8015436; import java.lang.invoke.MethodHandle; import java.lang.invoke.MethodHandles; import java.lang.invoke.MethodType; public class Test8015436 implements InterfaceWithDefaultMethod { @Override public void someMethod() { System.out.println("someMethod() invoked"); } public static void main(String[] args) throws Throwable { Test8015436 testObj = new Test8015436(); testObj.someMethod(); testObj.defaultMethod("invoked directly"); MethodHandles.Lookup lookup = MethodHandles.lookup(); MethodType mt = MethodType.methodType(void.class, String.class); MethodHandle mh = lookup.findVirtual(Test8015436.class, "defaultMethod", mt); mh.invokeExact(testObj, "invoked via a MethodHandle"); } } interface InterfaceWithDefaultMethod { public void someMethod(); default public void defaultMethod(String str){ System.out.println("defaultMethod() " + str); } } /* * A successful execution gives the output: * someMethod() invoked * defaultMethod() invoked directly * defaultMethod() invoked via a MethodHandle */