1 /*

     2  * Copyright (c) 2013, 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  * @bug 7194897

    27  * @summary JSR 292: Cannot create more than 16 instances of an anonymous class

    28  * @modules java.base/jdk.internal.misc

    29  *          java.management

    30  * @library /lib/testlibrary

    31  * @author  Robert Field

    32  * @compile -XDignore.symbol.file ManyNewInstanceAnonTest.java

    33  * @build jdk.testlibrary.*

    34  * @run main ClassFileInstaller ManyNewInstanceAnonTest

    35  * @run main/othervm -Xbootclasspath/a:. -Xverify:all ManyNewInstanceAnonTest

    36  * @run main/othervm -Xbootclasspath/a:. -Xverify:all -Dsun.reflection.noInflation=true ManyNewInstanceAnonTest

    37  */

    38 import java.io.ByteArrayOutputStream;

    39 import java.io.InputStream;

    40 import jdk.internal.misc.Unsafe;

    41 

    42 public class ManyNewInstanceAnonTest {

    43 

    44     static final int REPS = 20;

    45     static final Class<?> klass = ManyNewInstanceAnonTest.class;

    46 

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

    48         Class<?> c = Unsafe.getUnsafe().defineAnonymousClass(klass, readClassFile(), null);

    49         for (int i = 0; i < REPS; ++i) {

    50             System.out.printf("%d: %s\n", i, c.newInstance());

    51         }

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

    53     }

    54 

    55     private static byte[] readClassFile() throws Exception {

    56         try (InputStream in = klass.getResourceAsStream(klass.getSimpleName() + ".class");

    57              ByteArrayOutputStream out = new ByteArrayOutputStream())

    58         {

    59             int b;

    60             while ((b = in.read()) != -1) {

    61                 out.write(b);

    62             }

    63             return out.toByteArray();

    64         }

    65     }

    66 }