1 /* 2 * Copyright (c) 2014, 2015, 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 import java.io.File; 25 import java.io.FileOutputStream; 26 import jdk.internal.org.objectweb.asm.ClassWriter; 27 import jdk.internal.org.objectweb.asm.MethodVisitor; 28 import static jdk.internal.org.objectweb.asm.Opcodes.*; 29 import jdk.test.lib.*; 30 31 /* 32 * @test OverriderMsg 33 * @bug 8026894 34 * @library /testlibrary 35 * @modules java.base/jdk.internal.org.objectweb.asm 36 * java.base/sun.misc 37 * java.management 38 * @compile -XDignore.symbol.file OverriderMsg.java 39 * @run main/othervm OverriderMsg 40 */ 41 42 // This test checks that the super class name is included in the message when 43 // a method is detected overriding a final method in its super class. The 44 // asm part of the test creates these two classes: 45 // 46 // public class HasFinal { 47 // public final void m(String s) { } 48 // } 49 // 50 // public class Overrider extends HasFinal { 51 // public void m(String s) { } 52 // public static void main(String[] args) { } 53 // } 54 // 55 public class OverriderMsg { 56 57 public static void dump_HasFinal () throws Exception { 58 59 ClassWriter cw = new ClassWriter(0); 60 MethodVisitor mv; 61 62 cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "HasFinal", null, "java/lang/Object", null); 63 64 { 65 mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); 66 mv.visitCode(); 67 mv.visitVarInsn(ALOAD, 0); 68 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V"); 69 mv.visitInsn(RETURN); 70 mv.visitMaxs(1, 1); 71 mv.visitEnd(); 72 } 73 { 74 mv = cw.visitMethod(ACC_PUBLIC + ACC_FINAL, "m", "(Ljava/lang/String;)V", null, null); 75 mv.visitCode(); 76 mv.visitInsn(RETURN); 77 mv.visitMaxs(0, 2); 78 mv.visitEnd(); 79 } 80 cw.visitEnd(); 81 try (FileOutputStream fos = new FileOutputStream(new File("HasFinal.class"))) { 82 fos.write(cw.toByteArray()); 83 } 84 } 85 86 87 public static void dump_Overrider () throws Exception { 88 89 ClassWriter cw = new ClassWriter(0); 90 MethodVisitor mv; 91 cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "Overrider", null, "HasFinal", null); 92 93 { 94 mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); 95 mv.visitCode(); 96 mv.visitVarInsn(ALOAD, 0); 97 mv.visitMethodInsn(INVOKESPECIAL, "HasFinal", "<init>", "()V"); 98 mv.visitInsn(RETURN); 99 mv.visitMaxs(1, 1); 100 mv.visitEnd(); 101 } 102 { 103 mv = cw.visitMethod(ACC_PUBLIC, "m", "(Ljava/lang/String;)V", null, null); 104 mv.visitCode(); 105 mv.visitInsn(RETURN); 106 mv.visitMaxs(0, 2); 107 mv.visitEnd(); 108 } 109 { 110 mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null); 111 mv.visitCode(); 112 mv.visitInsn(RETURN); 113 mv.visitMaxs(0, 1); 114 mv.visitEnd(); 115 } 116 cw.visitEnd(); 117 118 try (FileOutputStream fos = new FileOutputStream(new File("Overrider.class"))) { 119 fos.write(cw.toByteArray()); 120 } 121 } 122 123 124 public static void main(String... args) throws Exception { 125 dump_HasFinal(); 126 dump_Overrider(); 127 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true, "-cp", ".", "Overrider"); 128 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 129 output.shouldContain( 130 "java.lang.VerifyError: class Overrider overrides final method HasFinal.m(Ljava/lang/String;)V"); 131 output.shouldHaveExitValue(1); 132 } 133 134 }