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test/compiler/8015436/Test8015436.java@710a3c8b516e (annotated)

test/compiler/8015436/Test8015436.java

Tue, 08 Aug 2017 15:57:29 +0800

author

aoqi

date

Tue, 08 Aug 2017 15:57:29 +0800

changeset 6876

710a3c8b516e

parent 5215

2f004f9dc9e1

parent 0

f90c822e73f8

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*
aoqi@0	25	* @test
aoqi@0	26	* @bug 8015436
aoqi@0	27	* @summary the IK _initial_method_idnum value must be adjusted if overpass methods are added
aoqi@0	28	* @run main Test8015436
aoqi@0	29	*
aoqi@0	30	*/
aoqi@0	31
aoqi@0	32	/*
aoqi@0	33	* The test checks that a MemberName for the defaultMethod() is cached in
aoqi@0	34	* the class MemberNameTable without a crash in the VM fastdebug mode.
aoqi@0	35	* The original issue was that the InstanceKlass _initial_method_idnum was
aoqi@0	36	* not adjusted properly when the overpass methods are added to the class.
aoqi@0	37	* The expected/correct behavior: The test does not crash nor throw any exceptions.
aoqi@0	38	* All the invocations of the defaultMethod() must be completed successfully.
aoqi@0	39	*/
aoqi@0	40
aoqi@0	41	import java.lang.invoke.*;
aoqi@0	42
aoqi@0	43	interface InterfaceWithDefaultMethod {
aoqi@0	44	public void someMethod();
aoqi@0	45
aoqi@0	46	default public void defaultMethod(String str){
aoqi@0	47	System.out.println("defaultMethod() " + str);
aoqi@0	48	}
aoqi@0	49	}
aoqi@0	50
aoqi@0	51	public class Test8015436 implements InterfaceWithDefaultMethod {
aoqi@0	52	@Override
aoqi@0	53	public void someMethod() {
aoqi@0	54	System.out.println("someMethod() invoked");
aoqi@0	55	}
aoqi@0	56
aoqi@0	57	public static void main(String[] args) throws Throwable {
aoqi@0	58	Test8015436 testObj = new Test8015436();
aoqi@0	59	testObj.someMethod();
aoqi@0	60	testObj.defaultMethod("invoked directly");
aoqi@0	61
aoqi@0	62	MethodHandles.Lookup lookup = MethodHandles.lookup();
aoqi@0	63	MethodType mt = MethodType.methodType(void.class, String.class);
aoqi@0	64	MethodHandle mh = lookup.findVirtual(Test8015436.class, "defaultMethod", mt);
aoqi@0	65	mh.invokeExact(testObj, "invoked via a MethodHandle");
aoqi@0	66	}
aoqi@0	67	}
aoqi@0	68
aoqi@0	69	/*
aoqi@0	70	* A successful execution gives the output:
aoqi@0	71	* someMethod() invoked
aoqi@0	72	* defaultMethod() invoked directly
aoqi@0	73	* defaultMethod() invoked via a MethodHandle
aoqi@0	74	*/