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