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