1 /* 2 * Copyright (c) 2013, 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 8026213 27 * @summary Reflection support for private methods in interfaces 28 * @author Robert Field 29 * @run main TestPrivateInterfaceMethodReflect 30 */ 31 32 import java.lang.reflect.*; 33 34 import jdk.internal.org.objectweb.asm.ClassWriter; 35 import jdk.internal.org.objectweb.asm.MethodVisitor; 36 import jdk.internal.org.objectweb.asm.Opcodes; 37 38 public class TestPrivateInterfaceMethodReflect { 39 40 static final String INTERFACE_NAME = "PrivateInterfaceMethodReflectTest_Interface"; 41 static final String CLASS_NAME = "PrivateInterfaceMethodReflectTest_Class"; 42 static final int EXPECTED = 1234; 43 44 static class TestClassLoader extends ClassLoader implements Opcodes { 45 46 @Override 47 public Class findClass(String name) throws ClassNotFoundException { 48 byte[] b; 49 try { 50 b = loadClassData(name); 51 } catch (Throwable th) { 52 // th.printStackTrace(); 53 throw new ClassNotFoundException("Loading error", th); 54 } 55 return defineClass(name, b, 0, b.length); 56 } 57 58 private byte[] loadClassData(String name) throws Exception { 59 ClassWriter cw = new ClassWriter(0); 60 MethodVisitor mv; 61 switch (name) { 62 case INTERFACE_NAME: 63 cw.visit(V1_8, ACC_ABSTRACT | ACC_INTERFACE | ACC_PUBLIC, INTERFACE_NAME, null, "java/lang/Object", null); 64 { 65 mv = cw.visitMethod(ACC_PRIVATE, "privInstance", "()I", null, null); 66 mv.visitCode(); 67 mv.visitLdcInsn(EXPECTED); 68 mv.visitInsn(IRETURN); 69 mv.visitMaxs(1, 1); 70 mv.visitEnd(); 71 } 72 break; 73 case CLASS_NAME: 74 cw.visit(52, ACC_SUPER | ACC_PUBLIC, CLASS_NAME, null, "java/lang/Object", new String[]{INTERFACE_NAME}); 75 { 76 mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); 77 mv.visitCode(); 78 mv.visitVarInsn(ALOAD, 0); 79 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V"); 80 mv.visitInsn(RETURN); 81 mv.visitMaxs(1, 1); 82 mv.visitEnd(); 83 } 84 break; 85 default: 86 break; 87 } 88 cw.visitEnd(); 89 90 return cw.toByteArray(); 91 } 92 } 93 94 public static void main(String[] args) throws Exception { 95 TestClassLoader tcl = new TestClassLoader(); 96 Class<?> itf = tcl.loadClass(INTERFACE_NAME); 97 Class<?> k = tcl.loadClass(CLASS_NAME); 98 Object inst = k.newInstance(); 99 Method[] meths = itf.getDeclaredMethods(); 100 if (meths.length != 1) { 101 throw new Exception("Expected one method in " + INTERFACE_NAME + " instead " + meths.length); 102 } 103 104 Method m = meths[0]; 105 int mod = m.getModifiers(); 106 if ((mod & Modifier.PRIVATE) == 0) { 107 throw new Exception("Expected " + m + " to be private"); 108 } 109 if ((mod & Modifier.STATIC) != 0) { 110 throw new Exception("Expected " + m + " to be instance method"); 111 } 112 113 m.setAccessible(true); 114 for (int i = 1; i < 200; i++) { 115 if (!m.invoke(inst).equals(EXPECTED)) { 116 throw new Exception("Expected " + EXPECTED + " from " + m); 117 } 118 } 119 120 System.out.println("Passed."); 121 } 122 }