1 /*
2 * Copyright (c) 2007, 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 /**
26 * @test
27
28 * @bug 6490436
29 * @summary Verify that protected constructor calls are not allowed for classfile version >= 50 (but that they are allowed for lesser versions).
30 * @author Keith McGuigan
31 */
32
33 public class VerifyProtectedConstructor extends ClassLoader {
34 public static void main(String argv[]) throws Exception {
35 VerifyProtectedConstructor t = new VerifyProtectedConstructor();
36
37 t.loadSuperClass();
38
39 try {
40 t.checkClassVersion(49); // should not throw VerifyError
41 }
42 catch(VerifyError e) {
43 throw new Exception("FAIL: should be no VerifyError for CF version 49");
44 }
45
46 try {
47 t.checkClassVersion(50); // should throw VerifyError
48 throw new Exception("FAIL: should be a VerifyError for CF version 50");
49 }
50 catch(VerifyError e) {
51 System.out.println("PASS");
52 }
53 }
54
55 private void loadSuperClass() {
56 /* -- code for super class A.A --
57 package A;
58 public class A {
59 protected A() {}
60 }
61 */
62 long[] cls_data = {
63 0xcafebabe00000032L, 0x000a0a0003000707L,
64 0x0008070009010006L, 0x3c696e69743e0100L,
65 0x0328295601000443L, 0x6f64650c00040005L,
66 0x010003412f410100L, 0x106a6176612f6c61L,
67 0x6e672f4f626a6563L, 0x7400210002000300L,
68 0x0000000001000400L, 0x0400050001000600L,
69 0x0000110001000100L, 0x0000052ab70001b1L,
70 0x0000000000000000L // 2 bytes extra
71 };
72 final int EXTRA = 2;
73 byte cf_bytes[] = toByteArray(cls_data);
74 defineClass("A.A", cf_bytes, 0, cf_bytes.length - EXTRA);
75 }
76
77 private int num_calls;
78 private static String classNames[] = { "B.B", "C.C" };
79
80 private void checkClassVersion(int version) throws VerifyError {
81 // This class is in violation of the spec since it accesses
82 // a protected constructor of a superclass while not being in the
83 // same package.
84 /* -- code for test class --
85 package B;
86 public class B extends A.A {
87 public static void f() { new A.A(); }
88 }
89 */
90 long[] cls_data = {
91 0xcafebabe00000032L, 0x000b0a0002000807L,
92 0x000907000a010006L, 0x3c696e69743e0100L,
93 0x0328295601000443L, 0x6f6465010001660cL,
94 0x0004000501000341L, 0x2f41010003422f42L,
95 0x0021000300020000L, 0x0000000200010004L,
96 0x0005000100060000L, 0x0011000100010000L,
97 0x00052ab70001b100L, 0x0000000009000700L,
98 0x0500010006000000L, 0x1500020000000000L,
99 0x09bb000259b70001L, 0x57b1000000000000L // no extra bytes
100 };
101 final int EXTRA = 0;
102
103 byte cf_bytes[] = toByteArray(cls_data);
104
105 // set version
106 cf_bytes[7] = (byte)version;
107
108 // Change B.B to C.C, D.D, ... for subsequent calls so we can call this
109 // multiple times and define different classes.
110 cf_bytes[61] += num_calls;
111 cf_bytes[63] += num_calls;
112 String name = classNames[num_calls];
113 num_calls++;
114
115 Class c = defineClass(name, cf_bytes, 0, cf_bytes.length - EXTRA);
116
117 try { c.newInstance(); } // to force linking, thus verification
118 catch(InstantiationException e) {}
119 catch(IllegalAccessException e) {}
120 }
121
122 static private byte[] toByteArray(long arr[]) {
123 // convert long array to byte array
124 java.nio.ByteBuffer bbuf = java.nio.ByteBuffer.allocate(arr.length * 8);
125 bbuf.asLongBuffer().put(java.nio.LongBuffer.wrap(arr));
126 return bbuf.array();
127 }
128 }