1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8186046 27 * @summary Test for an interface using condy with default overpass methods 28 * @library /lib/testlibrary/bytecode 29 * @build jdk.experimental.bytecode.BasicClassBuilder 30 * @run testng CondyInterfaceWithOverpassMethods 31 */ 32 33 import jdk.experimental.bytecode.BasicClassBuilder; 34 import jdk.experimental.bytecode.Flag; 35 import jdk.experimental.bytecode.TypedCodeBuilder; 36 import org.testng.annotations.BeforeClass; 37 import org.testng.annotations.Test; 38 39 import java.lang.invoke.MethodHandles; 40 import java.lang.invoke.MethodType; 41 42 @Test 43 public class CondyInterfaceWithOverpassMethods { 44 interface A { 45 int a(); 46 47 default int x() { 48 return 1; 49 } 50 } 51 52 53 // Generated class with methods containing condy ldc 54 Class<?> gc; 55 56 public static Object bsm(MethodHandles.Lookup l, String name, Class<?> type) { 57 return name; 58 } 59 60 @BeforeClass 61 public void generateClass() throws Exception { 62 // interface B extends A { 63 // // Overpass for method A.a 64 // 65 // default void y() { 66 // // ldc to Dynamic 67 // } 68 // } 69 Class<?> thisClass = CondyInterfaceWithOverpassMethods.class; 70 71 String genClassName = thisClass.getSimpleName() + "$Code"; 72 String bsmClassName = thisClass.getCanonicalName().replace('.', '/'); 73 String bsmMethodName = "bsm"; 74 String bsmDescriptor = MethodType.methodType(Object.class, MethodHandles.Lookup.class, 75 String.class, Class.class).toMethodDescriptorString(); 76 77 byte[] byteArray = new BasicClassBuilder(genClassName, 55, 0) 78 .withFlags(Flag.ACC_INTERFACE, Flag.ACC_ABSTRACT) 79 .withSuperclass("java/lang/Object") 80 .withSuperinterface(thisClass.getCanonicalName().replace('.', '/') + "$" + A.class.getSimpleName()) 81 .withMethod("y", "()Ljava/lang/String;", M -> 82 M.withFlags(Flag.ACC_PUBLIC) 83 .withCode(TypedCodeBuilder::new, C -> 84 C.ldc("String", "Ljava/lang/String;", bsmClassName, bsmMethodName, bsmDescriptor, 85 S -> {}) 86 .areturn() 87 )) 88 .build(); 89 90 gc = MethodHandles.lookup().defineClass(byteArray); 91 } 92 93 @Test 94 public void testClass() throws Exception { 95 // Trigger initialization 96 Class.forName(gc.getName()); 97 } 98 }