1 /*

     2  * Copyright (c) 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  * @test

    26  * @summary Verifies the behaviour of Unsafe.allocateInstance

    27  * @library /testlibrary

    28  * @run main AllocateInstance

    29  */

    30 

    31 import com.oracle.java.testlibrary.*;

    32 import sun.misc.Unsafe;

    33 import static com.oracle.java.testlibrary.Asserts.*;

    34 

    35 public class AllocateInstance {

    36     public static void main(String args[]) throws Exception {

    37         Unsafe unsafe = Utils.getUnsafe();

    38 

    39         // allocateInstance() should not result in a call to the constructor

    40         TestClass tc = (TestClass)unsafe.allocateInstance(TestClass.class);

    41         assertFalse(tc.calledConstructor);

    42 

    43         // allocateInstance() on an abstract class should result in an InstantiationException

    44         try {

    45             AbstractClass ac = (AbstractClass)unsafe.allocateInstance(AbstractClass.class);

    46             throw new RuntimeException("Did not get expected InstantiationException");

    47         } catch (InstantiationException e) {

    48             // Expected

    49         }

    50     }

    51 

    52     class TestClass {

    53         public boolean calledConstructor = false;

    54 

    55         public TestClass() {

    56             calledConstructor = true;

    57         }

    58     }

    59 

    60     abstract class AbstractClass {

    61         public AbstractClass() {}

    62     }

    63 }