11039
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1 /*
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 import java.util.List;
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25 import java.lang.management.ManagementFactory;
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26 import java.lang.management.MemoryManagerMXBean;
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27 import java.lang.management.MemoryPoolMXBean;
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28 import java.lang.management.MemoryUsage;
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29
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30 import java.lang.management.RuntimeMXBean;
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31 import java.lang.management.ManagementFactory;
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32
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33 /* @test TestMetaspaceMemoryPool
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34 * @bug 8000754
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35 * @summary Tests that a MemoryPoolMXBeans is created for metaspace and that a
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36 * MemoryManagerMXBean is created.
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37 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops TestMetaspaceMemoryPool
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38 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:MaxMetaspaceSize=60m TestMetaspaceMemoryPool
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39 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers TestMetaspaceMemoryPool
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40 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:ClassMetaspaceSize=60m TestMetaspaceMemoryPool
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41 */
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42 public class TestMetaspaceMemoryPool {
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43 public static void main(String[] args) {
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44 verifyThatMetaspaceMemoryManagerExists();
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45 verifyMemoryPool(getMemoryPool("Metaspace"), isFlagDefined("MaxMetaspaceSize"));
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46
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47 if (runsOn64bit()) {
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48 if (usesCompressedOops()) {
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49 MemoryPoolMXBean cksPool = getMemoryPool("Compressed Class Space");
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50 verifyMemoryPool(cksPool, true);
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51 }
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52 }
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53 }
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54
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55 private static boolean runsOn64bit() {
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56 return !System.getProperty("sun.arch.data.model").equals("32");
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57 }
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58
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59 private static boolean usesCompressedOops() {
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60 return isFlagDefined("+UseCompressedOops");
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61 }
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62
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63 private static boolean isFlagDefined(String name) {
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64 RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
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65 List<String> args = runtimeMxBean.getInputArguments();
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66 for (String arg : args) {
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67 if (arg.startsWith("-XX:" + name)) {
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68 return true;
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69 }
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70 }
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71 return false;
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72 }
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73
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74 private static void verifyThatMetaspaceMemoryManagerExists() {
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75 List<MemoryManagerMXBean> managers = ManagementFactory.getMemoryManagerMXBeans();
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76 for (MemoryManagerMXBean manager : managers) {
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77 if (manager.getName().equals("Metaspace Manager")) {
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78 return;
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79 }
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80 }
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81
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82 throw new RuntimeException("Expected to find a metaspace memory manager");
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83 }
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84
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85 private static MemoryPoolMXBean getMemoryPool(String name) {
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86 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
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87 for (MemoryPoolMXBean pool : pools) {
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88 if (pool.getName().equals(name)) {
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89 return pool;
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90 }
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91 }
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92
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93 throw new RuntimeException("Expected to find a memory pool with name " + name);
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94 }
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95
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96 private static void verifyMemoryPool(MemoryPoolMXBean pool, boolean isMaxDefined) {
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97 MemoryUsage mu = pool.getUsage();
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98 assertDefined(mu.getInit(), "init");
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99 assertDefined(mu.getUsed(), "used");
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100 assertDefined(mu.getCommitted(), "committed");
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101
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102 if (isMaxDefined) {
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103 assertDefined(mu.getMax(), "max");
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104 } else {
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105 assertUndefined(mu.getMax(), "max");
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106 }
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107 }
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108
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109 private static void assertDefined(long value, String name) {
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110 assertTrue(value != -1, "Expected " + name + " to be defined");
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111 }
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112
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113 private static void assertUndefined(long value, String name) {
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114 assertEquals(value, -1, "Expected " + name + " to be undefined");
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115 }
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116
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117 private static void assertEquals(long actual, long expected, String msg) {
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118 assertTrue(actual == expected, msg);
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119 }
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120
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121 private static void assertTrue(boolean condition, String msg) {
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122 if (!condition) {
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123 throw new RuntimeException(msg);
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124 }
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125 }
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126 }
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