/* * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.management; import java.lang.management.ManagementFactory; import java.lang.management.ThreadInfo; import javax.management.ObjectName; /** * Implementation class for the thread subsystem. * Standard and committed hotspot-specific metrics if any. * * ManagementFactory.getThreadMXBean() returns an instance * of this class. */class ThreadImpl implements com.sun.management.ThreadMXBean { private final VMManagement jvm; // default for thread contention monitoring is disabled. private boolean contentionMonitoringEnabled = false; private boolean cpuTimeEnabled; private boolean allocatedMemoryEnabled; /** * Constructor of ThreadImpl class. */ ThreadImpl(VMManagement vm) { this.jvm = vm; this.cpuTimeEnabled = jvm.isThreadCpuTimeEnabled(); this.allocatedMemoryEnabled = jvm.isThreadAllocatedMemoryEnabled(); } public int getThreadCount() { return jvm.getLiveThreadCount(); } public int getPeakThreadCount() { return jvm.getPeakThreadCount(); } public long getTotalStartedThreadCount() { return jvm.getTotalThreadCount(); } public int getDaemonThreadCount() { return jvm.getDaemonThreadCount(); } public boolean isThreadContentionMonitoringSupported() { return jvm.isThreadContentionMonitoringSupported(); } public synchronized boolean isThreadContentionMonitoringEnabled() { if (!isThreadContentionMonitoringSupported()) { throw new UnsupportedOperationException( "Thread contention monitoring is not supported."); } return contentionMonitoringEnabled; } public boolean isThreadCpuTimeSupported() { return jvm.isOtherThreadCpuTimeSupported(); } public boolean isCurrentThreadCpuTimeSupported() { return jvm.isCurrentThreadCpuTimeSupported(); } public boolean isThreadAllocatedMemorySupported() { return jvm.isThreadAllocatedMemorySupported(); } public boolean isThreadCpuTimeEnabled() { if (!isThreadCpuTimeSupported() && !isCurrentThreadCpuTimeSupported()) { throw new UnsupportedOperationException( "Thread CPU time measurement is not supported"); } return cpuTimeEnabled; } public boolean isThreadAllocatedMemoryEnabled() { if (!isThreadAllocatedMemorySupported()) { throw new UnsupportedOperationException( "Thread allocated memory measurement is not supported"); } return allocatedMemoryEnabled; } public long[] getAllThreadIds() { Util.checkMonitorAccess(); Thread[] threads = getThreads(); int length = threads.length; long[] ids = new long[length]; for (int i = 0; i < length; i++) { Thread t = threads[i]; ids[i] = t.getId(); } return ids; } public ThreadInfo getThreadInfo(long id) { long[] ids = new long[1]; ids[0] = id; final ThreadInfo[] infos = getThreadInfo(ids, 0); return infos[0]; } public ThreadInfo getThreadInfo(long id, int maxDepth) { long[] ids = new long[1]; ids[0] = id; final ThreadInfo[] infos = getThreadInfo(ids, maxDepth); return infos[0]; } public ThreadInfo[] getThreadInfo(long[] ids) { return getThreadInfo(ids, 0); } private void verifyThreadIds(long[] ids) { if (ids == null) { throw new NullPointerException("Null ids parameter."); } for (int i = 0; i < ids.length; i++) { if (ids[i] <= 0) { throw new IllegalArgumentException( "Invalid thread ID parameter: " + ids[i]); } } } public ThreadInfo[] getThreadInfo(long[] ids, int maxDepth) { verifyThreadIds(ids); if (maxDepth < 0) { throw new IllegalArgumentException( "Invalid maxDepth parameter: " + maxDepth); } Util.checkMonitorAccess(); ThreadInfo[] infos = new ThreadInfo[ids.length]; // nulls if (maxDepth == Integer.MAX_VALUE) { getThreadInfo1(ids, -1, infos); } else { getThreadInfo1(ids, maxDepth, infos); } return infos; } public void setThreadContentionMonitoringEnabled(boolean enable) { if (!isThreadContentionMonitoringSupported()) { throw new UnsupportedOperationException( "Thread contention monitoring is not supported"); } Util.checkControlAccess(); synchronized (this) { if (contentionMonitoringEnabled != enable) { if (enable) { // if reeabled, reset contention time statistics // for all threads resetContentionTimes0(0); } // update the VM of the state change setThreadContentionMonitoringEnabled0(enable); contentionMonitoringEnabled = enable; } } } private boolean verifyCurrentThreadCpuTime() { // check if Thread CPU time measurement is supported. if (!isCurrentThreadCpuTimeSupported()) { throw new UnsupportedOperationException( "Current thread CPU time measurement is not supported."); } return isThreadCpuTimeEnabled(); } public long getCurrentThreadCpuTime() { if (verifyCurrentThreadCpuTime()) { return getThreadTotalCpuTime0(0); } return -1; } public long getThreadCpuTime(long id) { long[] ids = new long[1]; ids[0] = id; final long[] times = getThreadCpuTime(ids); return times[0]; } private boolean verifyThreadCpuTime(long[] ids) { verifyThreadIds(ids); // check if Thread CPU time measurement is supported. if (!isThreadCpuTimeSupported() && !isCurrentThreadCpuTimeSupported()) { throw new UnsupportedOperationException( "Thread CPU time measurement is not supported."); } if (!isThreadCpuTimeSupported()) { // support current thread only for (int i = 0; i < ids.length; i++) { if (ids[i] != Thread.currentThread().getId()) { throw new UnsupportedOperationException( "Thread CPU time measurement is only supported" + " for the current thread."); } } } return isThreadCpuTimeEnabled(); } public long[] getThreadCpuTime(long[] ids) { boolean verified = verifyThreadCpuTime(ids); int length = ids.length; long[] times = new long[length]; java.util.Arrays.fill(times, -1); if (verified) { if (length == 1) { long id = ids[0]; if (id == Thread.currentThread().getId()) { id = 0; } times[0] = getThreadTotalCpuTime0(id); } else { getThreadTotalCpuTime1(ids, times); } } return times; } public long getCurrentThreadUserTime() { if (verifyCurrentThreadCpuTime()) { return getThreadUserCpuTime0(0); } return -1; } public long getThreadUserTime(long id) { long[] ids = new long[1]; ids[0] = id; final long[] times = getThreadUserTime(ids); return times[0]; } public long[] getThreadUserTime(long[] ids) { boolean verified = verifyThreadCpuTime(ids); int length = ids.length; long[] times = new long[length]; java.util.Arrays.fill(times, -1); if (verified) { if (length == 1) { long id = ids[0]; if (id == Thread.currentThread().getId()) { id = 0; } times[0] = getThreadUserCpuTime0(id); } else { getThreadUserCpuTime1(ids, times); } } return times; } public void setThreadCpuTimeEnabled(boolean enable) { if (!isThreadCpuTimeSupported() && !isCurrentThreadCpuTimeSupported()) { throw new UnsupportedOperationException( "Thread CPU time measurement is not supported"); } Util.checkControlAccess(); synchronized (this) { if (cpuTimeEnabled != enable) { // notify VM of the state change setThreadCpuTimeEnabled0(enable); cpuTimeEnabled = enable; } } } public long getThreadAllocatedBytes(long id) { long[] ids = new long[1]; ids[0] = id; final long[] sizes = getThreadAllocatedBytes(ids); return sizes[0]; } private boolean verifyThreadAllocatedMemory(long[] ids) { verifyThreadIds(ids); // check if Thread allocated memory measurement is supported. if (!isThreadAllocatedMemorySupported()) { throw new UnsupportedOperationException( "Thread allocated memory measurement is not supported."); } return isThreadAllocatedMemoryEnabled(); } public long[] getThreadAllocatedBytes(long[] ids) { boolean verified = verifyThreadAllocatedMemory(ids); long[] sizes = new long[ids.length]; java.util.Arrays.fill(sizes, -1); if (verified) { getThreadAllocatedMemory1(ids, sizes); } return sizes; } public void setThreadAllocatedMemoryEnabled(boolean enable) { if (!isThreadAllocatedMemorySupported()) { throw new UnsupportedOperationException( "Thread allocated memory measurement is not supported."); } Util.checkControlAccess(); synchronized (this) { if (allocatedMemoryEnabled != enable) { // notify VM of the state change setThreadAllocatedMemoryEnabled0(enable); allocatedMemoryEnabled = enable; } } } public long[] findMonitorDeadlockedThreads() { Util.checkMonitorAccess(); Thread[] threads = findMonitorDeadlockedThreads0(); if (threads == null) { return null; } long[] ids = new long[threads.length]; for (int i = 0; i < threads.length; i++) { Thread t = threads[i]; ids[i] = t.getId(); } return ids; } public long[] findDeadlockedThreads() { if (!isSynchronizerUsageSupported()) { throw new UnsupportedOperationException( "Monitoring of Synchronizer Usage is not supported."); } Util.checkMonitorAccess(); Thread[] threads = findDeadlockedThreads0(); if (threads == null) { return null; } long[] ids = new long[threads.length]; for (int i = 0; i < threads.length; i++) { Thread t = threads[i]; ids[i] = t.getId(); } return ids; } public void resetPeakThreadCount() { Util.checkControlAccess(); resetPeakThreadCount0(); } public boolean isObjectMonitorUsageSupported() { return jvm.isObjectMonitorUsageSupported(); } public boolean isSynchronizerUsageSupported() { return jvm.isSynchronizerUsageSupported(); } private void verifyDumpThreads(boolean lockedMonitors, boolean lockedSynchronizers) { if (lockedMonitors && !isObjectMonitorUsageSupported()) { throw new UnsupportedOperationException( "Monitoring of Object Monitor Usage is not supported."); } if (lockedSynchronizers && !isSynchronizerUsageSupported()) { throw new UnsupportedOperationException( "Monitoring of Synchronizer Usage is not supported."); } Util.checkMonitorAccess(); } public ThreadInfo[] getThreadInfo(long[] ids, boolean lockedMonitors, boolean lockedSynchronizers) { verifyThreadIds(ids); verifyDumpThreads(lockedMonitors, lockedSynchronizers); return dumpThreads0(ids, lockedMonitors, lockedSynchronizers); } public ThreadInfo[] dumpAllThreads(boolean lockedMonitors, boolean lockedSynchronizers) { verifyDumpThreads(lockedMonitors, lockedSynchronizers); return dumpThreads0(null, lockedMonitors, lockedSynchronizers); } // VM support where maxDepth == -1 to request entire stack dump private static native Thread[] getThreads(); private static native void getThreadInfo1(long[] ids, int maxDepth, ThreadInfo[] result); private static native long getThreadTotalCpuTime0(long id); private static native void getThreadTotalCpuTime1(long[] ids, long[] result); private static native long getThreadUserCpuTime0(long id); private static native void getThreadUserCpuTime1(long[] ids, long[] result); private static native void getThreadAllocatedMemory1(long[] ids, long[] result); private static native void setThreadCpuTimeEnabled0(boolean enable); private static native void setThreadAllocatedMemoryEnabled0(boolean enable); private static native void setThreadContentionMonitoringEnabled0(boolean enable); private static native Thread[] findMonitorDeadlockedThreads0(); private static native Thread[] findDeadlockedThreads0(); private static native void resetPeakThreadCount0(); private static native ThreadInfo[] dumpThreads0(long[] ids, boolean lockedMonitors, boolean lockedSynchronizers); // tid == 0 to reset contention times for all threads private static native void resetContentionTimes0(long tid); public ObjectName getObjectName() { return Util.newObjectName(ManagementFactory.THREAD_MXBEAN_NAME); } }
/*
* Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.management;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import javax.management.ObjectName;
/**
* Implementation class for the thread subsystem.
* Standard and committed hotspot-specific metrics if any.
*
* ManagementFactory.getThreadMXBean() returns an instance
* of this class.
*/
class ThreadImpl implements com.sun.management.ThreadMXBean {
private final VMManagement jvm;
// default for thread contention monitoring is disabled.
private boolean contentionMonitoringEnabled = false;
private boolean cpuTimeEnabled;
private boolean allocatedMemoryEnabled;
/**
* Constructor of ThreadImpl class.
*/
ThreadImpl(VMManagement vm) {
this.jvm = vm;
this.cpuTimeEnabled = jvm.isThreadCpuTimeEnabled();
this.allocatedMemoryEnabled = jvm.isThreadAllocatedMemoryEnabled();
}
public int getThreadCount() {
return jvm.getLiveThreadCount();
}
public int getPeakThreadCount() {
return jvm.getPeakThreadCount();
}
public long getTotalStartedThreadCount() {
return jvm.getTotalThreadCount();
}
public int getDaemonThreadCount() {
return jvm.getDaemonThreadCount();
}
public boolean isThreadContentionMonitoringSupported() {
return jvm.isThreadContentionMonitoringSupported();
}
public synchronized boolean isThreadContentionMonitoringEnabled() {
if (!isThreadContentionMonitoringSupported()) {
throw new UnsupportedOperationException(
"Thread contention monitoring is not supported.");
}
return contentionMonitoringEnabled;
}
public boolean isThreadCpuTimeSupported() {
return jvm.isOtherThreadCpuTimeSupported();
}
public boolean isCurrentThreadCpuTimeSupported() {
return jvm.isCurrentThreadCpuTimeSupported();
}
public boolean isThreadAllocatedMemorySupported() {
return jvm.isThreadAllocatedMemorySupported();
}
public boolean isThreadCpuTimeEnabled() {
if (!isThreadCpuTimeSupported() &&
!isCurrentThreadCpuTimeSupported()) {
throw new UnsupportedOperationException(
"Thread CPU time measurement is not supported");
}
return cpuTimeEnabled;
}
public boolean isThreadAllocatedMemoryEnabled() {
if (!isThreadAllocatedMemorySupported()) {
throw new UnsupportedOperationException(
"Thread allocated memory measurement is not supported");
}
return allocatedMemoryEnabled;
}
public long[] getAllThreadIds() {
Util.checkMonitorAccess();
Thread[] threads = getThreads();
int length = threads.length;
long[] ids = new long[length];
for (int i = 0; i < length; i++) {
Thread t = threads[i];
ids[i] = t.getId();
}
return ids;
}
public ThreadInfo getThreadInfo(long id) {
long[] ids = new long[1];
ids[0] = id;
final ThreadInfo[] infos = getThreadInfo(ids, 0);
return infos[0];
}
public ThreadInfo getThreadInfo(long id, int maxDepth) {
long[] ids = new long[1];
ids[0] = id;
final ThreadInfo[] infos = getThreadInfo(ids, maxDepth);
return infos[0];
}
public ThreadInfo[] getThreadInfo(long[] ids) {
return getThreadInfo(ids, 0);
}
private void verifyThreadIds(long[] ids) {
if (ids == null) {
throw new NullPointerException("Null ids parameter.");
}
for (int i = 0; i < ids.length; i++) {
if (ids[i] <= 0) {
throw new IllegalArgumentException(
"Invalid thread ID parameter: " + ids[i]);
}
}
}
public ThreadInfo[] getThreadInfo(long[] ids, int maxDepth) {
verifyThreadIds(ids);
if (maxDepth < 0) {
throw new IllegalArgumentException(
"Invalid maxDepth parameter: " + maxDepth);
}
Util.checkMonitorAccess();
ThreadInfo[] infos = new ThreadInfo[ids.length]; // nulls
if (maxDepth == Integer.MAX_VALUE) {
getThreadInfo1(ids, -1, infos);
} else {
getThreadInfo1(ids, maxDepth, infos);
}
return infos;
}
public void setThreadContentionMonitoringEnabled(boolean enable) {
if (!isThreadContentionMonitoringSupported()) {
throw new UnsupportedOperationException(
"Thread contention monitoring is not supported");
}
Util.checkControlAccess();
synchronized (this) {
if (contentionMonitoringEnabled != enable) {
if (enable) {
// if reeabled, reset contention time statistics
// for all threads
resetContentionTimes0(0);
}
// update the VM of the state change
setThreadContentionMonitoringEnabled0(enable);
contentionMonitoringEnabled = enable;
}
}
}
private boolean verifyCurrentThreadCpuTime() {
// check if Thread CPU time measurement is supported.
if (!isCurrentThreadCpuTimeSupported()) {
throw new UnsupportedOperationException(
"Current thread CPU time measurement is not supported.");
}
return isThreadCpuTimeEnabled();
}
public long getCurrentThreadCpuTime() {
if (verifyCurrentThreadCpuTime()) {
return getThreadTotalCpuTime0(0);
}
return -1;
}
public long getThreadCpuTime(long id) {
long[] ids = new long[1];
ids[0] = id;
final long[] times = getThreadCpuTime(ids);
return times[0];
}
private boolean verifyThreadCpuTime(long[] ids) {
verifyThreadIds(ids);
// check if Thread CPU time measurement is supported.
if (!isThreadCpuTimeSupported() &&
!isCurrentThreadCpuTimeSupported()) {
throw new UnsupportedOperationException(
"Thread CPU time measurement is not supported.");
}
if (!isThreadCpuTimeSupported()) {
// support current thread only
for (int i = 0; i < ids.length; i++) {
if (ids[i] != Thread.currentThread().getId()) {
throw new UnsupportedOperationException(
"Thread CPU time measurement is only supported" +
" for the current thread.");
}
}
}
return isThreadCpuTimeEnabled();
}
public long[] getThreadCpuTime(long[] ids) {
boolean verified = verifyThreadCpuTime(ids);
int length = ids.length;
long[] times = new long[length];
java.util.Arrays.fill(times, -1);
if (verified) {
if (length == 1) {
long id = ids[0];
if (id == Thread.currentThread().getId()) {
id = 0;
}
times[0] = getThreadTotalCpuTime0(id);
} else {
getThreadTotalCpuTime1(ids, times);
}
}
return times;
}
public long getCurrentThreadUserTime() {
if (verifyCurrentThreadCpuTime()) {
return getThreadUserCpuTime0(0);
}
return -1;
}
public long getThreadUserTime(long id) {
long[] ids = new long[1];
ids[0] = id;
final long[] times = getThreadUserTime(ids);
return times[0];
}
public long[] getThreadUserTime(long[] ids) {
boolean verified = verifyThreadCpuTime(ids);
int length = ids.length;
long[] times = new long[length];
java.util.Arrays.fill(times, -1);
if (verified) {
if (length == 1) {
long id = ids[0];
if (id == Thread.currentThread().getId()) {
id = 0;
}
times[0] = getThreadUserCpuTime0(id);
} else {
getThreadUserCpuTime1(ids, times);
}
}
return times;
}
public void setThreadCpuTimeEnabled(boolean enable) {
if (!isThreadCpuTimeSupported() &&
!isCurrentThreadCpuTimeSupported()) {
throw new UnsupportedOperationException(
"Thread CPU time measurement is not supported");
}
Util.checkControlAccess();
synchronized (this) {
if (cpuTimeEnabled != enable) {
// notify VM of the state change
setThreadCpuTimeEnabled0(enable);
cpuTimeEnabled = enable;
}
}
}
public long getThreadAllocatedBytes(long id) {
long[] ids = new long[1];
ids[0] = id;
final long[] sizes = getThreadAllocatedBytes(ids);
return sizes[0];
}
private boolean verifyThreadAllocatedMemory(long[] ids) {
verifyThreadIds(ids);
// check if Thread allocated memory measurement is supported.
if (!isThreadAllocatedMemorySupported()) {
throw new UnsupportedOperationException(
"Thread allocated memory measurement is not supported.");
}
return isThreadAllocatedMemoryEnabled();
}
public long[] getThreadAllocatedBytes(long[] ids) {
boolean verified = verifyThreadAllocatedMemory(ids);
long[] sizes = new long[ids.length];
java.util.Arrays.fill(sizes, -1);
if (verified) {
getThreadAllocatedMemory1(ids, sizes);
}
return sizes;
}
public void setThreadAllocatedMemoryEnabled(boolean enable) {
if (!isThreadAllocatedMemorySupported()) {
throw new UnsupportedOperationException(
"Thread allocated memory measurement is not supported.");
}
Util.checkControlAccess();
synchronized (this) {
if (allocatedMemoryEnabled != enable) {
// notify VM of the state change
setThreadAllocatedMemoryEnabled0(enable);
allocatedMemoryEnabled = enable;
}
}
}
public long[] findMonitorDeadlockedThreads() {
Util.checkMonitorAccess();
Thread[] threads = findMonitorDeadlockedThreads0();
if (threads == null) {
return null;
}
long[] ids = new long[threads.length];
for (int i = 0; i < threads.length; i++) {
Thread t = threads[i];
ids[i] = t.getId();
}
return ids;
}
public long[] findDeadlockedThreads() {
if (!isSynchronizerUsageSupported()) {
throw new UnsupportedOperationException(
"Monitoring of Synchronizer Usage is not supported.");
}
Util.checkMonitorAccess();
Thread[] threads = findDeadlockedThreads0();
if (threads == null) {
return null;
}
long[] ids = new long[threads.length];
for (int i = 0; i < threads.length; i++) {
Thread t = threads[i];
ids[i] = t.getId();
}
return ids;
}
public void resetPeakThreadCount() {
Util.checkControlAccess();
resetPeakThreadCount0();
}
public boolean isObjectMonitorUsageSupported() {
return jvm.isObjectMonitorUsageSupported();
}
public boolean isSynchronizerUsageSupported() {
return jvm.isSynchronizerUsageSupported();
}
private void verifyDumpThreads(boolean lockedMonitors,
boolean lockedSynchronizers) {
if (lockedMonitors && !isObjectMonitorUsageSupported()) {
throw new UnsupportedOperationException(
"Monitoring of Object Monitor Usage is not supported.");
}
if (lockedSynchronizers && !isSynchronizerUsageSupported()) {
throw new UnsupportedOperationException(
"Monitoring of Synchronizer Usage is not supported.");
}
Util.checkMonitorAccess();
}
public ThreadInfo[] getThreadInfo(long[] ids,
boolean lockedMonitors,
boolean lockedSynchronizers) {
verifyThreadIds(ids);
verifyDumpThreads(lockedMonitors, lockedSynchronizers);
return dumpThreads0(ids, lockedMonitors, lockedSynchronizers);
}
public ThreadInfo[] dumpAllThreads(boolean lockedMonitors,
boolean lockedSynchronizers) {
verifyDumpThreads(lockedMonitors, lockedSynchronizers);
return dumpThreads0(null, lockedMonitors, lockedSynchronizers);
}
// VM support where maxDepth == -1 to request entire stack dump
private static native Thread[] getThreads();
private static native void getThreadInfo1(long[] ids,
int maxDepth,
ThreadInfo[] result);
private static native long getThreadTotalCpuTime0(long id);
private static native void getThreadTotalCpuTime1(long[] ids, long[] result);
private static native long getThreadUserCpuTime0(long id);
private static native void getThreadUserCpuTime1(long[] ids, long[] result);
private static native void getThreadAllocatedMemory1(long[] ids, long[] result);
private static native void setThreadCpuTimeEnabled0(boolean enable);
private static native void setThreadAllocatedMemoryEnabled0(boolean enable);
private static native void setThreadContentionMonitoringEnabled0(boolean enable);
private static native Thread[] findMonitorDeadlockedThreads0();
private static native Thread[] findDeadlockedThreads0();
private static native void resetPeakThreadCount0();
private static native ThreadInfo[] dumpThreads0(long[] ids,
boolean lockedMonitors,
boolean lockedSynchronizers);
// tid == 0 to reset contention times for all threads
private static native void resetContentionTimes0(long tid);
public ObjectName getObjectName() {
return Util.newObjectName(ManagementFactory.THREAD_MXBEAN_NAME);
}
}