1 /* 2 * Copyright (c) 2016, 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 8081800 27 * @summary Redefine private and default interface methods 28 * @library /test/lib 29 * @modules java.base/jdk.internal.misc 30 * @modules java.compiler 31 * java.instrument 32 * jdk.jartool/sun.tools.jar 33 * @run main RedefineClassHelper 34 * @run main/othervm -javaagent:redefineagent.jar -Xlog:redefine+class*=trace RedefineInterfaceMethods 35 */ 36 public class RedefineInterfaceMethods { 37 38 static final int RET = -2; 39 40 static interface B { 41 int ORIGINAL_RETURN = 1; 42 int NEW_RETURN = 2; 43 private int privateMethod() { 44 return ORIGINAL_RETURN; 45 } 46 public default int defaultMethod() { 47 return privateMethod(); 48 } 49 } 50 51 public static String redefinedPrivateMethod = 52 "interface RedefineInterfaceMethods$B {" + 53 " int ORIGINAL_RETURN = 1;" + 54 " int NEW_RETURN = 2;" + 55 " private int privateMethod() {" + 56 " return NEW_RETURN;" + 57 " }" + 58 " public default int defaultMethod() {" + 59 " return privateMethod();" + 60 " }" + 61 "}"; 62 63 public static String redefinedDefaultMethod = 64 "interface RedefineInterfaceMethods$B {" + 65 " int ORIGINAL_RETURN = 1;" + 66 " int NEW_RETURN = 2;" + 67 " private int privateMethod() {" + 68 " return ORIGINAL_RETURN;" + 69 " }" + 70 " public default int defaultMethod() {" + 71 " return RedefineInterfaceMethods.RET;" + 72 " }" + 73 "}"; 74 75 static class Impl implements B { 76 } 77 78 79 public static void main(String[] args) throws Exception { 80 81 Impl impl = new Impl(); 82 83 int res = impl.defaultMethod(); 84 if (res != B.ORIGINAL_RETURN) 85 throw new Error("defaultMethod returned " + res + 86 " expected " + B.ORIGINAL_RETURN); 87 88 RedefineClassHelper.redefineClass(B.class, redefinedPrivateMethod); 89 90 res = impl.defaultMethod(); 91 if (res != B.NEW_RETURN) 92 throw new Error("defaultMethod returned " + res + 93 " expected " + B.NEW_RETURN); 94 95 System.gc(); 96 97 RedefineClassHelper.redefineClass(B.class, redefinedDefaultMethod); 98 99 res = impl.defaultMethod(); 100 if (res != RET) 101 throw new Error("defaultMethod returned " + res + 102 " expected " + RET); 103 } 104 }