1/*
2 * Copyright (c) 2013, 2016, 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
24import java.util.List;
25import java.lang.management.*;
26import jdk.test.lib.Platform;
27import jdk.test.lib.process.ProcessTools;
28import jdk.test.lib.process.OutputAnalyzer;
29import static jdk.test.lib.Asserts.*;
30
31/* @test TestMetaspaceMemoryPool
32 * @bug 8000754
33 * @summary Tests that a MemoryPoolMXBeans is created for metaspace and that a
34 *          MemoryManagerMXBean is created.
35 * @library /test/lib
36 * @modules java.base/jdk.internal.misc
37 *          java.management
38 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops TestMetaspaceMemoryPool
39 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:MaxMetaspaceSize=60m TestMetaspaceMemoryPool
40 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers TestMetaspaceMemoryPool
41 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:CompressedClassSpaceSize=60m TestMetaspaceMemoryPool
42 */
43public class TestMetaspaceMemoryPool {
44    public static void main(String[] args) {
45        verifyThatMetaspaceMemoryManagerExists();
46
47        boolean isMetaspaceMaxDefined = InputArguments.containsPrefix("-XX:MaxMetaspaceSize");
48        verifyMemoryPool(getMemoryPool("Metaspace"), isMetaspaceMaxDefined);
49
50        if (Platform.is64bit()) {
51            if (InputArguments.contains("-XX:+UseCompressedOops")) {
52                MemoryPoolMXBean cksPool = getMemoryPool("Compressed Class Space");
53                verifyMemoryPool(cksPool, true);
54            }
55        }
56    }
57
58    private static void verifyThatMetaspaceMemoryManagerExists() {
59        List<MemoryManagerMXBean> managers = ManagementFactory.getMemoryManagerMXBeans();
60        for (MemoryManagerMXBean manager : managers) {
61            if (manager.getName().equals("Metaspace Manager")) {
62                return;
63            }
64        }
65
66        throw new RuntimeException("Expected to find a metaspace memory manager");
67    }
68
69    private static MemoryPoolMXBean getMemoryPool(String name) {
70        List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
71        for (MemoryPoolMXBean pool : pools) {
72            if (pool.getName().equals(name)) {
73                return pool;
74            }
75        }
76
77        throw new RuntimeException("Expected to find a memory pool with name " + name);
78    }
79
80    private static void verifyMemoryPool(MemoryPoolMXBean pool, boolean isMaxDefined) {
81        MemoryUsage mu = pool.getUsage();
82        long init = mu.getInit();
83        long used = mu.getUsed();
84        long committed = mu.getCommitted();
85        long max = mu.getMax();
86
87        assertGTE(init, 0L);
88        assertGTE(used, init);
89        assertGTE(committed, used);
90
91        if (isMaxDefined) {
92            assertGTE(max, committed);
93        } else {
94            assertEQ(max, -1L);
95        }
96    }
97}
98