| /* |
| * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| /* |
| * @test |
| * @bug 8032010 |
| * @summary method lookup on an abstract method in a concrete class should be successful |
| * @run main TestConcreteClassWithAbstractMethod |
| */ |
| |
| import jdk.internal.org.objectweb.asm.ClassWriter; |
| import jdk.internal.org.objectweb.asm.MethodVisitor; |
| |
| import static jdk.internal.org.objectweb.asm.Opcodes.*; |
| |
| /* |
| * class T1 { public int m() {} } |
| * class T2 { public abstract int m(); } |
| * class T3 { public int m() {} } |
| * |
| * Call site: T3.test() { invokevirtual T2.m() } |
| * T3.m() should be invoked |
| */ |
| public class TestConcreteClassWithAbstractMethod { |
| static final String classT1 = "p1.T1"; |
| static final String classT2 = "p1.T2"; |
| static final String classT3 = "p1.T3"; |
| |
| static final String callerName = classT3; |
| |
| public static void main(String[] args) throws Exception { |
| ClassLoader cl = new ClassLoader() { |
| public Class<?> loadClass(String name) throws ClassNotFoundException { |
| if (findLoadedClass(name) != null) { |
| return findLoadedClass(name); |
| } |
| |
| if (classT1.equals(name)) { |
| byte[] classFile = dumpT1(); |
| return defineClass(classT1, classFile, 0, classFile.length); |
| } |
| if (classT2.equals(name)) { |
| byte[] classFile = dumpT2(); |
| return defineClass(classT2, classFile, 0, classFile.length); |
| } |
| if (classT3.equals(name)) { |
| byte[] classFile = dumpT3(); |
| return defineClass(classT3, classFile, 0, classFile.length); |
| } |
| |
| return super.loadClass(name); |
| } |
| }; |
| |
| cl.loadClass(classT1); |
| cl.loadClass(classT2); |
| cl.loadClass(classT3); |
| |
| //cl.loadClass(callerName).getDeclaredMethod("m"); |
| cl.loadClass(callerName).newInstance(); |
| |
| int result = (Integer)cl.loadClass(callerName).getDeclaredMethod("test").invoke(null); |
| System.out.println(""+result); |
| } |
| |
| public static byte[] dumpT1() { |
| ClassWriter cw = new ClassWriter(0); |
| MethodVisitor mv; |
| |
| cw.visit(52, ACC_PUBLIC | ACC_SUPER, "p1/T1", null, "java/lang/Object", null); |
| { |
| mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); |
| mv.visitCode(); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); |
| mv.visitInsn(RETURN); |
| mv.visitMaxs(1, 1); |
| mv.visitEnd(); |
| } |
| { |
| mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null); |
| mv.visitCode(); |
| mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); |
| mv.visitLdcInsn("p1/T1.m()"); |
| mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false); |
| mv.visitIntInsn(BIPUSH, 3); |
| mv.visitInsn(IRETURN); |
| mv.visitMaxs(2, 1); |
| mv.visitEnd(); |
| } |
| cw.visitEnd(); |
| |
| return cw.toByteArray(); |
| } |
| |
| public static byte[] dumpT2() { |
| ClassWriter cw = new ClassWriter(0); |
| MethodVisitor mv; |
| |
| cw.visit(52, ACC_PUBLIC | ACC_SUPER, "p1/T2", null, "p1/T1", null); |
| { |
| mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); |
| mv.visitCode(); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitMethodInsn(INVOKESPECIAL, "p1/T1", "<init>", "()V", false); |
| mv.visitInsn(RETURN); |
| mv.visitMaxs(1, 1); |
| mv.visitEnd(); |
| } |
| { |
| mv = cw.visitMethod(ACC_PUBLIC + ACC_ABSTRACT, "m", "()I", null, null); |
| mv.visitEnd(); |
| } |
| cw.visitEnd(); |
| |
| return cw.toByteArray(); |
| } |
| |
| public static byte[] dumpT3() { |
| ClassWriter cw = new ClassWriter(0); |
| MethodVisitor mv; |
| |
| cw.visit(52, ACC_PUBLIC + ACC_SUPER, "p1/T3", null, "p1/T2", null); |
| |
| { |
| mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); |
| mv.visitCode(); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitMethodInsn(INVOKESPECIAL, "p1/T2", "<init>", "()V", false); |
| mv.visitInsn(RETURN); |
| mv.visitMaxs(1, 1); |
| mv.visitEnd(); |
| } |
| { |
| mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null); |
| mv.visitCode(); |
| mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); |
| mv.visitLdcInsn("p1/T3.m()"); |
| mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false); |
| mv.visitIntInsn(BIPUSH, 2); |
| mv.visitInsn(IRETURN); |
| mv.visitMaxs(2, 1); |
| mv.visitEnd(); |
| } |
| { |
| mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "test", "()I", null, null); |
| mv.visitCode(); |
| mv.visitTypeInsn(NEW, "p1/T3"); |
| mv.visitInsn(DUP); |
| mv.visitMethodInsn(INVOKESPECIAL, "p1/T3", "<init>", "()V", false); |
| mv.visitMethodInsn(INVOKEVIRTUAL, "p1/T2", "m", "()I", false); |
| mv.visitInsn(IRETURN); |
| mv.visitMaxs(3, 2); |
| mv.visitEnd(); |
| } |
| cw.visitEnd(); |
| |
| return cw.toByteArray(); |
| } |
| } |