1/* 2 * Copyright (c) 2015, 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 */ 23package org.graalvm.compiler.debug; 24 25import static java.lang.Thread.currentThread; 26 27public class Management { 28 29 private static final com.sun.management.ThreadMXBean threadMXBean = Management.initThreadMXBean(); 30 31 /** 32 * The amount of memory allocated by 33 * {@link com.sun.management.ThreadMXBean#getThreadAllocatedBytes(long)} itself. 34 */ 35 private static final long threadMXBeanOverhead = -getCurrentThreadAllocatedBytes() + getCurrentThreadAllocatedBytes(); 36 37 public static long getCurrentThreadAllocatedBytes() { 38 return threadMXBean.getThreadAllocatedBytes(currentThread().getId()) - threadMXBeanOverhead; 39 } 40 41 private static com.sun.management.ThreadMXBean initThreadMXBean() { 42 try { 43 return (com.sun.management.ThreadMXBean) java.lang.management.ManagementFactory.getThreadMXBean(); 44 } catch (Error err) { 45 return new UnimplementedBean(); 46 } 47 } 48 49 public static java.lang.management.ThreadMXBean getThreadMXBean() { 50 return threadMXBean; 51 } 52 53 private static class UnimplementedBean implements java.lang.management.ThreadMXBean, com.sun.management.ThreadMXBean { 54 55 @Override 56 public javax.management.ObjectName getObjectName() { 57 return null; 58 } 59 60 @Override 61 public long getThreadAllocatedBytes(long arg0) { 62 return 0; 63 } 64 65 @Override 66 public long[] getThreadAllocatedBytes(long[] arg0) { 67 return null; 68 } 69 70 @Override 71 public long[] getThreadCpuTime(long[] arg0) { 72 return null; 73 } 74 75 @Override 76 public long[] getThreadUserTime(long[] arg0) { 77 return null; 78 } 79 80 @Override 81 public boolean isThreadAllocatedMemoryEnabled() { 82 return false; 83 } 84 85 @Override 86 public boolean isThreadAllocatedMemorySupported() { 87 return false; 88 } 89 90 @Override 91 public void setThreadAllocatedMemoryEnabled(boolean arg0) { 92 } 93 94 @Override 95 public int getThreadCount() { 96 return 0; 97 } 98 99 @Override 100 public int getPeakThreadCount() { 101 return 0; 102 } 103 104 @Override 105 public long getTotalStartedThreadCount() { 106 return 0; 107 } 108 109 @Override 110 public int getDaemonThreadCount() { 111 return 0; 112 } 113 114 @Override 115 public long[] getAllThreadIds() { 116 return null; 117 } 118 119 @Override 120 public java.lang.management.ThreadInfo getThreadInfo(long id) { 121 return null; 122 } 123 124 @Override 125 public java.lang.management.ThreadInfo[] getThreadInfo(long[] ids) { 126 return null; 127 } 128 129 @Override 130 public java.lang.management.ThreadInfo getThreadInfo(long id, int maxDepth) { 131 return null; 132 } 133 134 @Override 135 public java.lang.management.ThreadInfo[] getThreadInfo(long[] ids, int maxDepth) { 136 return null; 137 } 138 139 @Override 140 public boolean isThreadContentionMonitoringSupported() { 141 return false; 142 } 143 144 @Override 145 public boolean isThreadContentionMonitoringEnabled() { 146 return false; 147 } 148 149 @Override 150 public void setThreadContentionMonitoringEnabled(boolean enable) { 151 } 152 153 @Override 154 public long getCurrentThreadCpuTime() { 155 return 0; 156 } 157 158 @Override 159 public long getCurrentThreadUserTime() { 160 return 0; 161 } 162 163 @Override 164 public long getThreadCpuTime(long id) { 165 return 0; 166 } 167 168 @Override 169 public long getThreadUserTime(long id) { 170 return 0; 171 } 172 173 @Override 174 public boolean isThreadCpuTimeSupported() { 175 return false; 176 } 177 178 @Override 179 public boolean isCurrentThreadCpuTimeSupported() { 180 return false; 181 } 182 183 @Override 184 public boolean isThreadCpuTimeEnabled() { 185 return false; 186 } 187 188 @Override 189 public void setThreadCpuTimeEnabled(boolean enable) { 190 } 191 192 @Override 193 public long[] findMonitorDeadlockedThreads() { 194 return null; 195 } 196 197 @Override 198 public void resetPeakThreadCount() { 199 } 200 201 @Override 202 public long[] findDeadlockedThreads() { 203 return null; 204 } 205 206 @Override 207 public boolean isObjectMonitorUsageSupported() { 208 return false; 209 } 210 211 @Override 212 public boolean isSynchronizerUsageSupported() { 213 return false; 214 } 215 216 @Override 217 public java.lang.management.ThreadInfo[] getThreadInfo(long[] ids, boolean lockedMonitors, boolean lockedSynchronizers) { 218 return null; 219 } 220 221 @Override 222 public java.lang.management.ThreadInfo[] dumpAllThreads(boolean lockedMonitors, boolean lockedSynchronizers) { 223 return null; 224 } 225 } 226} 227