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 import java.lang.reflect.InvocationTargetException; 26 import jdk.internal.org.objectweb.asm.ClassWriter; 27 import jdk.internal.org.objectweb.asm.Handle; 28 import jdk.internal.org.objectweb.asm.MethodVisitor; 29 import jdk.internal.org.objectweb.asm.Opcodes; 30 31 /** 32 * @test 33 * @bug 8025260 34 * @summary Ensure that AbstractMethodError is thrown, not NullPointerException, through MethodHandles::jump_from_method_handle code path 35 * 36 * @compile -XDignore.symbol.file ByteClassLoader.java I.java C.java TestAMEnotNPE.java 37 * @run main/othervm TestAMEnotNPE 38 */ 39 40 public class TestAMEnotNPE implements Opcodes { 41 42 /** 43 * The bytes for D, a NOT abstract class extending abstract class C 44 * without supplying an implementation for abstract method m. 45 * There is a default method in the interface I, but it should lose to 46 * the abstract class. 47 * 48 * @return 49 * @throws Exception 50 */ 51 public static byte[] bytesForD() throws Exception { 52 53 ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES| ClassWriter.COMPUTE_MAXS); 54 MethodVisitor mv; 55 56 cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, "D", null, "C", null); 57 58 { 59 mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); 60 mv.visitCode(); 61 mv.visitVarInsn(ALOAD, 0); 62 mv.visitMethodInsn(INVOKESPECIAL, "C", "<init>", "()V"); 63 mv.visitInsn(RETURN); 64 mv.visitMaxs(0, 0); 65 mv.visitEnd(); 66 } 67 cw.visitEnd(); 68 69 return cw.toByteArray(); 70 } 71 72 73 /** 74 * The bytecodes for an invokeExact of a particular methodHandle, D.m viewed as I.m 75 * @return 76 * @throws Exception 77 */ 78 public static byte[] bytesForT() throws Exception { 79 80 ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES| ClassWriter.COMPUTE_MAXS); 81 MethodVisitor mv; 82 83 cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, "T", null, "java/lang/Object", null); 84 { 85 mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); 86 mv.visitCode(); 87 mv.visitVarInsn(ALOAD, 0); 88 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V"); 89 mv.visitInsn(RETURN); 90 mv.visitMaxs(0,0); 91 mv.visitEnd(); 92 } 93 { 94 mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "test", "()I", null, null); 95 mv.visitCode(); 96 mv.visitLdcInsn(new Handle(Opcodes.H_INVOKEINTERFACE, "I", "m", "()I")); 97 mv.visitTypeInsn(NEW, "D"); 98 mv.visitInsn(DUP); 99 mv.visitMethodInsn(INVOKESPECIAL, "D", "<init>", "()V"); 100 mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/invoke/MethodHandle", "invokeExact", "(LI;)I"); 101 mv.visitInsn(IRETURN); 102 mv.visitMaxs(0,0); 103 mv.visitEnd(); 104 } 105 cw.visitEnd(); 106 return cw.toByteArray(); 107 } 108 109 public static void main(String args[] ) throws Throwable { 110 ByteClassLoader bcl = new ByteClassLoader(); 111 Class<?> d = bcl.loadBytes("D", bytesForD()); 112 Class<?> t = bcl.loadBytes("T", bytesForT()); 113 Object[] arg_for_args = new Object[0]; 114 try { 115 Object result = t.getMethod("test").invoke(null, arg_for_args); 116 } catch (InvocationTargetException e) { 117 Throwable th = e.getCause(); 118 if (th instanceof AbstractMethodError) { 119 th.printStackTrace(System.out); 120 System.out.println("PASS, saw expected exception (AbstractMethodError)."); 121 } else { 122 System.out.println("Expected AbstractMethodError wrapped in InvocationTargetException, saw " + th); 123 throw th; 124 } 125 } 126 } 127 }