1/*
2 * Copyright (c) 2013, 2017, 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 /test/lib
31 * @author  Robert Field
32 * @compile -XDignore.symbol.file ManyNewInstanceAnonTest.java
33 * @run main ClassFileInstaller ManyNewInstanceAnonTest
34 * @run main/othervm -Xbootclasspath/a:. -Xverify:all ManyNewInstanceAnonTest
35 * @run main/othervm -Xbootclasspath/a:. -Xverify:all -Dsun.reflection.noInflation=true ManyNewInstanceAnonTest
36 */
37import java.io.ByteArrayOutputStream;
38import java.io.InputStream;
39import jdk.internal.misc.Unsafe;
40
41public class ManyNewInstanceAnonTest {
42
43    static final int REPS = 20;
44    static final Class<?> klass = ManyNewInstanceAnonTest.class;
45
46    public static void main(String[] args) throws Exception {
47        Class<?> c = Unsafe.getUnsafe().defineAnonymousClass(klass, readClassFile(), null);
48        for (int i = 0; i < REPS; ++i) {
49            System.out.printf("%d: %s\n", i, c.newInstance());
50        }
51        System.out.println("Passed.");
52    }
53
54    private static byte[] readClassFile() throws Exception {
55        try (InputStream in = klass.getResourceAsStream(klass.getSimpleName() + ".class");
56             ByteArrayOutputStream out = new ByteArrayOutputStream())
57        {
58            int b;
59            while ((b = in.read()) != -1) {
60                out.write(b);
61            }
62            return out.toByteArray();
63        }
64    }
65}
66