1/*
2 * Copyright (c) 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
24/*
25 * @test 8163808
26 * @modules java.base/jdk.internal.org.objectweb.asm
27 * @run main TransitiveOverrideCFV50
28 */
29
30import java.util.*;
31import java.io.File;
32import java.io.FileOutputStream;
33import jdk.internal.org.objectweb.asm.ClassWriter;
34import jdk.internal.org.objectweb.asm.MethodVisitor;
35import jdk.internal.org.objectweb.asm.AnnotationVisitor;
36import jdk.internal.org.objectweb.asm.Opcodes;
37
38/*
39 * Test mixed classfile version overriding handling.
40 * Key is to generate P2/C with an older classfile version <=50
41 * Correct response is B.m:2 for older classfiles
42 * This test was added to ensure no assertions in debug
43 * note: for P2/C classfile version >=51, correct answer becomes C.m:3
44 * public class  P1.A {             public int m() { return 1; }
45 *
46 * public class  P1.B extends A {          int m() { return 2; }
47 *
48 * public class  P2.c extends P1.B { public int m() { return 3; }
49 */
50
51public class TransitiveOverrideCFV50 implements Opcodes{
52  static final String classP1A = "P1.A";
53    static final String classP1B = "P1.B";
54    static final String classP2C = "P2.C";
55
56    static final String callerName = classP2C;
57
58    public static void main(String[] args) throws Exception {
59        ClassLoader cl = new ClassLoader() {
60            public Class<?> loadClass(String name) throws ClassNotFoundException {
61                if (findLoadedClass(name) != null) {
62                    return findLoadedClass(name);
63                }
64
65                if (classP1A.equals(name)) {
66                    byte[] classFile = dumpP1A();
67                    return defineClass(classP1A, classFile, 0, classFile.length);
68                }
69                if (classP1B.equals(name)) {
70                    byte[] classFile = dumpP1B();
71                    return defineClass(classP1B, classFile, 0, classFile.length);
72                }
73                if (classP2C.equals(name)) {
74                    byte[] classFile = dumpP2C();
75                    return defineClass(classP2C, classFile, 0, classFile.length);
76                }
77
78                return super.loadClass(name);
79            }
80        };
81
82        cl.loadClass(classP1A);
83        cl.loadClass(classP1B);
84        cl.loadClass(classP2C);
85
86        //cl.loadClass(callerName).getDeclaredMethod("test");
87        cl.loadClass(callerName).newInstance();
88
89        int result = (Integer)cl.loadClass(callerName).getDeclaredMethod("test").invoke(null);
90        if (result != 2) {
91          throw new RuntimeException("expected B.m:2, got " + result);
92        }
93    }
94
95    public static byte[] dumpP1A() {
96
97        ClassWriter cw = new ClassWriter(0);
98        MethodVisitor mv;
99
100        cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "P1/A", null, "java/lang/Object", null);
101
102        {
103            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
104            mv.visitCode();
105            mv.visitVarInsn(ALOAD, 0);
106            mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
107            mv.visitInsn(RETURN);
108            mv.visitMaxs(1, 1);
109            mv.visitEnd();
110        }
111        {
112            mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
113            mv.visitCode();
114            mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
115            mv.visitLdcInsn("A.m");
116            mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
117            mv.visitIntInsn(BIPUSH, 1);
118            mv.visitInsn(IRETURN);
119            mv.visitMaxs(2, 1);
120            mv.visitEnd();
121        }
122        cw.visitEnd();
123
124        return cw.toByteArray();
125    }
126    public static byte[] dumpP1B() {
127
128        ClassWriter cw = new ClassWriter(0);
129        MethodVisitor mv;
130
131        cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, "P1/B", null, "P1/A", null);
132
133        {
134            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
135            mv.visitCode();
136            mv.visitVarInsn(ALOAD, 0);
137            mv.visitMethodInsn(INVOKESPECIAL, "P1/A", "<init>", "()V", false);
138            mv.visitInsn(RETURN);
139            mv.visitMaxs(1, 1);
140            mv.visitEnd();
141        }
142        {
143            mv = cw.visitMethod(0, "m", "()I", null, null);
144            mv.visitCode();
145            mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
146            mv.visitLdcInsn("B.m");
147            mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
148            mv.visitIntInsn(BIPUSH, 2);
149            mv.visitInsn(IRETURN);
150            mv.visitMaxs(2, 1);
151            mv.visitEnd();
152        }
153        cw.visitEnd();
154
155        return cw.toByteArray();
156    }
157    public static byte[] dumpP2C() {
158
159        ClassWriter cw = new ClassWriter(0);
160        MethodVisitor mv;
161
162        cw.visit(V1_6, ACC_PUBLIC + ACC_SUPER, "P2/C", null, "P1/B", null);
163
164        {
165            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
166            mv.visitCode();
167            mv.visitVarInsn(ALOAD, 0);
168            mv.visitMethodInsn(INVOKESPECIAL, "P1/B", "<init>", "()V", false);
169            mv.visitInsn(RETURN);
170            mv.visitMaxs(1, 1);
171            mv.visitEnd();
172        }
173        {
174            mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
175            mv.visitCode();
176            mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
177            mv.visitLdcInsn("P2/C.m");
178            mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
179            mv.visitIntInsn(BIPUSH, 3);
180            mv.visitInsn(IRETURN);
181            mv.visitMaxs(2, 1);
182            mv.visitEnd();
183        }
184        {
185            mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "test", "()I", null, null);
186            mv.visitCode();
187            mv.visitTypeInsn(NEW, "P2/C");
188            mv.visitInsn(DUP);
189            mv.visitMethodInsn(INVOKESPECIAL, "P2/C", "<init>", "()V", false);
190            mv.visitMethodInsn(INVOKEVIRTUAL, "P1/A", "m", "()I", false);
191            mv.visitInsn(IRETURN);
192            mv.visitMaxs(3, 2);
193            mv.visitEnd();
194        }
195
196        cw.visitEnd();
197
198        return cw.toByteArray();
199    }
200}
201