/* * Copyright (c) 2014, 2015, 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. */ import java.io.File; import java.io.FileOutputStream; import jdk.internal.org.objectweb.asm.ClassWriter; import jdk.internal.org.objectweb.asm.MethodVisitor; import static jdk.internal.org.objectweb.asm.Opcodes.*; import jdk.test.lib.process.ProcessTools; import jdk.test.lib.process.OutputAnalyzer; /* * @test OverriderMsg * @bug 8026894 * @library /test/lib * @modules java.base/jdk.internal.org.objectweb.asm * java.base/jdk.internal.misc * java.management * @compile -XDignore.symbol.file OverriderMsg.java * @run main/othervm OverriderMsg */ // This test checks that the super class name is included in the message when // a method is detected overriding a final method in its super class. The // asm part of the test creates these two classes: // // public class HasFinal { // public final void m(String s) { } // } // // public class Overrider extends HasFinal { // public void m(String s) { } // public static void main(String[] args) { } // } // public class OverriderMsg { public static void dump_HasFinal () throws Exception { ClassWriter cw = new ClassWriter(0); MethodVisitor mv; cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "HasFinal", null, "java/lang/Object", null); { mv = cw.visitMethod(ACC_PUBLIC, "", "()V", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "", "()V"); mv.visitInsn(RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } { mv = cw.visitMethod(ACC_PUBLIC + ACC_FINAL, "m", "(Ljava/lang/String;)V", null, null); mv.visitCode(); mv.visitInsn(RETURN); mv.visitMaxs(0, 2); mv.visitEnd(); } cw.visitEnd(); try (FileOutputStream fos = new FileOutputStream(new File("HasFinal.class"))) { fos.write(cw.toByteArray()); } } public static void dump_Overrider () throws Exception { ClassWriter cw = new ClassWriter(0); MethodVisitor mv; cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "Overrider", null, "HasFinal", null); { mv = cw.visitMethod(ACC_PUBLIC, "", "()V", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESPECIAL, "HasFinal", "", "()V"); mv.visitInsn(RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } { mv = cw.visitMethod(ACC_PUBLIC, "m", "(Ljava/lang/String;)V", null, null); mv.visitCode(); mv.visitInsn(RETURN); mv.visitMaxs(0, 2); mv.visitEnd(); } { mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null); mv.visitCode(); mv.visitInsn(RETURN); mv.visitMaxs(0, 1); mv.visitEnd(); } cw.visitEnd(); try (FileOutputStream fos = new FileOutputStream(new File("Overrider.class"))) { fos.write(cw.toByteArray()); } } public static void main(String... args) throws Exception { dump_HasFinal(); dump_Overrider(); ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true, "-cp", ".", "Overrider"); OutputAnalyzer output = new OutputAnalyzer(pb.start()); output.shouldContain( "java.lang.VerifyError: class Overrider overrides final method HasFinal.m(Ljava/lang/String;)V"); output.shouldHaveExitValue(1); } }