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comparison test/runtime/Metaspace/FragmentMetaspace.java @ 10344:699d9df07e59

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8009576: Test returns ClassNotFoundException Summary: Small classpath fix and move tests into open Reviewed-by: mgerdin, zgu
author ctornqvi
date Thu, 23 May 2013 17:39:32 +0200
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10343:6bd680e9ea35 10344:699d9df07e59
1 /*
2 * Copyright (c) 2013, 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 * @library /runtime/testlibrary
27 * @build GeneratedClassLoader
28 * @run main/othervm/timeout=200 FragmentMetaspace
29 */
30
31 import java.io.IOException;
32
33 /**
34 * Test that tries to fragment the native memory used by class loaders.
35 * This test creates class loaders that load classes of increasing size for every
36 * iteration. By increasing the size of the class meta data needed for every iteration
37 * we stress the subsystem for allocating native memory for meta data.
38 */
39 public class FragmentMetaspace {
40
41 public static void main(String... args) {
42 runGrowing(Long.valueOf(System.getProperty("time", "80000")));
43 // try to clean up and unload classes to decrease
44 // class verification time in debug vm
45 System.gc();
46 }
47
48 private static void runGrowing(long time) {
49 long startTime = System.currentTimeMillis();
50 for (int i = 0; System.currentTimeMillis() < startTime + time; ++i) {
51 try {
52 GeneratedClassLoader gcl = new GeneratedClassLoader();
53
54 Class<?> c = gcl.getGeneratedClasses(i, 100)[0];
55 c.newInstance();
56 c = null;
57
58 gcl = null;
59 } catch (IOException|InstantiationException|IllegalAccessException ex) {
60 throw new RuntimeException(ex);
61 }
62 }
63 }
64 }