sspitsyn@5209: /*
sspitsyn@5209:  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
sspitsyn@5209:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
sspitsyn@5209:  *
sspitsyn@5209:  * This code is free software; you can redistribute it and/or modify it
sspitsyn@5209:  * under the terms of the GNU General Public License version 2 only, as
sspitsyn@5209:  * published by the Free Software Foundation.
sspitsyn@5209:  *
sspitsyn@5209:  * This code is distributed in the hope that it will be useful, but WITHOUT
sspitsyn@5209:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
sspitsyn@5209:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
sspitsyn@5209:  * version 2 for more details (a copy is included in the LICENSE file that
sspitsyn@5209:  * accompanied this code).
sspitsyn@5209:  *
sspitsyn@5209:  * You should have received a copy of the GNU General Public License version
sspitsyn@5209:  * 2 along with this work; if not, write to the Free Software Foundation,
sspitsyn@5209:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
sspitsyn@5209:  *
sspitsyn@5209:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
sspitsyn@5209:  * or visit www.oracle.com if you need additional information or have any
sspitsyn@5209:  * questions.
sspitsyn@5209:  */
sspitsyn@5209: 
sspitsyn@5209: /*
sspitsyn@5209:  * @test
sspitsyn@5209:  * @bug 8015436
sspitsyn@5209:  * @summary the IK _initial_method_idnum value must be adjusted if overpass methods are added
sspitsyn@5209:  * @run main Test8015436
sspitsyn@5209:  *
sspitsyn@5209:  */
sspitsyn@5209: 
sspitsyn@5209: /*
sspitsyn@5209:  * The test checks that a MemberName for the defaultMethod() is cached in
sspitsyn@5209:  * the class MemberNameTable without a crash in the VM fastdebug mode.
sspitsyn@5209:  * The original issue was that the InstanceKlass _initial_method_idnum was
sspitsyn@5209:  * not adjusted properly when the overpass methods are added to the class.
sspitsyn@5209:  * The expected/correct behavior: The test does not crash nor throw any exceptions.
sspitsyn@5209:  * All the invocations of the defaultMethod() must be completed successfully.
sspitsyn@5209:  */
sspitsyn@5209: 
sspitsyn@5209: import java.lang.invoke.*;
sspitsyn@5209: 
sspitsyn@5209: interface InterfaceWithDefaultMethod {
sspitsyn@5209:     public void someMethod();
sspitsyn@5209: 
sspitsyn@5209:     default public void defaultMethod(String str){
sspitsyn@5209:         System.out.println("defaultMethod() " + str);
sspitsyn@5209:     }
sspitsyn@5209: }
sspitsyn@5209: 
sspitsyn@5209: class Test8015436 implements InterfaceWithDefaultMethod {
sspitsyn@5209:     @Override
sspitsyn@5209:     public void someMethod() {
sspitsyn@5209:         System.out.println("someMethod() invoked");
sspitsyn@5209:     }
sspitsyn@5209: 
sspitsyn@5209:     public static void main(String[] args) throws Throwable {
sspitsyn@5209:         Test8015436 testObj = new Test8015436();
sspitsyn@5209:         testObj.someMethod();
sspitsyn@5209:         testObj.defaultMethod("invoked directly");
sspitsyn@5209: 
sspitsyn@5209:         MethodHandles.Lookup lookup = MethodHandles.lookup();
sspitsyn@5209:         MethodType   mt = MethodType.methodType(void.class, String.class);
sspitsyn@5209:         MethodHandle mh = lookup.findVirtual(Test8015436.class, "defaultMethod", mt);
sspitsyn@5209:         mh.invokeExact(testObj, "invoked via a MethodHandle");
sspitsyn@5209:     }
sspitsyn@5209: }
sspitsyn@5209: 
sspitsyn@5209: /*
sspitsyn@5209:  * A successful execution gives the output:
sspitsyn@5209:  *   someMethod() invoked
sspitsyn@5209:  *   defaultMethod() invoked directly
sspitsyn@5209:  *   defaultMethod() invoked via a MethodHandle
sspitsyn@5209:  */