1 /*

     2  * Copyright (c) 2007, 2015, 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 any classfile versions in either verifier.

    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       throw new Exception("FAIL: should be a VerifyError for CF version 49");

    42     }

    43     catch(VerifyError e) {

    44        System.out.println("PASS for CF version 49");

    45     }

    46 

    47     try {

    48       t.checkClassVersion(50); // should throw VerifyError

    49       throw new Exception("FAIL: should be a VerifyError for CF version 50");

    50     }

    51     catch(VerifyError e) {

    52        System.out.println("PASS");

    53     }

    54   }

    55 

    56   private void loadSuperClass() {

    57     /* -- code for super class A.A --

    58        package A;

    59        public class A {

    60          protected A() {}

    61        }

    62     */

    63     long[] cls_data = {

    64       0xcafebabe00000032L, 0x000a0a0003000707L,

    65       0x0008070009010006L, 0x3c696e69743e0100L,

    66       0x0328295601000443L, 0x6f64650c00040005L,

    67       0x010003412f410100L, 0x106a6176612f6c61L,

    68       0x6e672f4f626a6563L, 0x7400210002000300L,

    69       0x0000000001000400L, 0x0400050001000600L,

    70       0x0000110001000100L, 0x0000052ab70001b1L,

    71       0x0000000000000000L // 2 bytes extra

    72     };

    73     final int EXTRA = 2;

    74     byte cf_bytes[] = toByteArray(cls_data);

    75     defineClass("A.A", cf_bytes, 0, cf_bytes.length - EXTRA);

    76   }

    77 

    78   private int num_calls;

    79   private static String classNames[] = { "B.B", "C.C" };

    80 

    81   private void checkClassVersion(int version) throws VerifyError {

    82     // This class is in violation of the spec since it accesses

    83     // a protected constructor of a superclass while not being in the

    84     // same package.

    85     /* -- code for test class --

    86         package B;

    87         public class B extends A.A {

    88           public static void f() { new A.A(); }

    89         }

    90     */

    91     long[] cls_data = {

    92       0xcafebabe00000032L, 0x000b0a0002000807L,

    93       0x000907000a010006L, 0x3c696e69743e0100L,

    94       0x0328295601000443L, 0x6f6465010001660cL,

    95       0x0004000501000341L, 0x2f41010003422f42L,

    96       0x0021000300020000L, 0x0000000200010004L,

    97       0x0005000100060000L, 0x0011000100010000L,

    98       0x00052ab70001b100L, 0x0000000009000700L,

    99       0x0500010006000000L, 0x1500020000000000L,

   100       0x09bb000259b70001L, 0x57b1000000000000L // no extra bytes

   101     };

   102     final int EXTRA = 0;

   103 

   104     byte cf_bytes[] = toByteArray(cls_data);

   105 

   106     // set version

   107     cf_bytes[7] = (byte)version;

   108 

   109     // Change B.B to C.C, D.D, ... for subsequent calls so we can call this

   110     // multiple times and define different classes.

   111     cf_bytes[61] += num_calls;

   112     cf_bytes[63] += num_calls;

   113     String name = classNames[num_calls];

   114     num_calls++;

   115 

   116     Class c = defineClass(name, cf_bytes, 0, cf_bytes.length - EXTRA);

   117 

   118     try { c.newInstance(); } // to force linking, thus verification

   119     catch(InstantiationException e) {}

   120     catch(IllegalAccessException e) {}

   121   }

   122 

   123   static private byte[] toByteArray(long arr[]) {

   124     // convert long array to byte array

   125     java.nio.ByteBuffer bbuf = java.nio.ByteBuffer.allocate(arr.length * 8);

   126     bbuf.asLongBuffer().put(java.nio.LongBuffer.wrap(arr));

   127     return bbuf.array();

   128   }

   129 }