1/*
2 * Copyright (c) 2014, 2016, 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
24import java.io.File;
25import java.io.FileOutputStream;
26import jdk.internal.org.objectweb.asm.ClassWriter;
27import jdk.internal.org.objectweb.asm.MethodVisitor;
28import static jdk.internal.org.objectweb.asm.Opcodes.*;
29import jdk.test.lib.process.ProcessTools;
30import jdk.test.lib.process.OutputAnalyzer;
31
32/*
33 * @test OverriderMsg
34 * @bug 8026894
35 * @library /test/lib
36 * @modules java.base/jdk.internal.org.objectweb.asm
37 *          java.base/jdk.internal.misc
38 *          java.management
39 * @compile -XDignore.symbol.file OverriderMsg.java
40 * @run main/othervm OverriderMsg
41 */
42
43// This test checks that the super class name is included in the message when
44// a method is detected overriding a final method in its super class.  The
45// asm part of the test creates these two classes:
46//
47//     public class HasFinal {
48//         public final void m(String s) { }
49//     }
50//
51//     public class Overrider extends HasFinal {
52//         public void m(String s) { }
53//         public static void main(String[] args) { }
54//     }
55//
56public class OverriderMsg {
57
58    public static void dump_HasFinal () throws Exception {
59
60        ClassWriter cw = new ClassWriter(0);
61        MethodVisitor mv;
62
63        cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "HasFinal", null, "java/lang/Object", null);
64
65        {
66            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
67            mv.visitCode();
68            mv.visitVarInsn(ALOAD, 0);
69            mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
70            mv.visitInsn(RETURN);
71            mv.visitMaxs(1, 1);
72            mv.visitEnd();
73        }
74        {
75            mv = cw.visitMethod(ACC_PUBLIC + ACC_FINAL, "m", "(Ljava/lang/String;)V", null, null);
76            mv.visitCode();
77            mv.visitInsn(RETURN);
78            mv.visitMaxs(0, 2);
79            mv.visitEnd();
80        }
81        cw.visitEnd();
82        try (FileOutputStream fos = new FileOutputStream(new File("HasFinal.class"))) {
83             fos.write(cw.toByteArray());
84        }
85    }
86
87
88    public static void dump_Overrider () throws Exception {
89
90        ClassWriter cw = new ClassWriter(0);
91        MethodVisitor mv;
92        cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "Overrider", null, "HasFinal", null);
93
94        {
95            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
96            mv.visitCode();
97            mv.visitVarInsn(ALOAD, 0);
98            mv.visitMethodInsn(INVOKESPECIAL, "HasFinal", "<init>", "()V");
99            mv.visitInsn(RETURN);
100            mv.visitMaxs(1, 1);
101            mv.visitEnd();
102        }
103        {
104            mv = cw.visitMethod(ACC_PUBLIC, "m", "(Ljava/lang/String;)V", null, null);
105            mv.visitCode();
106            mv.visitInsn(RETURN);
107            mv.visitMaxs(0, 2);
108            mv.visitEnd();
109        }
110        {
111            mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
112            mv.visitCode();
113            mv.visitInsn(RETURN);
114            mv.visitMaxs(0, 1);
115            mv.visitEnd();
116        }
117        cw.visitEnd();
118
119        try (FileOutputStream fos = new FileOutputStream(new File("Overrider.class"))) {
120             fos.write(cw.toByteArray());
121        }
122    }
123
124
125    public static void main(String... args) throws Exception {
126        dump_HasFinal();
127        dump_Overrider();
128        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true, "-cp", ".",  "Overrider");
129        OutputAnalyzer output = new OutputAnalyzer(pb.start());
130        output.shouldContain(
131            "java.lang.VerifyError: class Overrider overrides final method HasFinal.m(Ljava/lang/String;)V");
132        output.shouldHaveExitValue(1);
133    }
134
135}
136