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/*
* Copyright (c) 2011, 2018, 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.
*
* 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 nsk.monitoring.ThreadMXBean.GetThreadAllocatedBytes;
import nsk.share.*;
import nsk.monitoring.share.*;
import nsk.monitoring.ThreadMXBean.ThreadMXBeanTestBase;
import nsk.monitoring.ThreadMXBean.MXBeanTestThread;
import nsk.monitoring.ThreadMXBean.BarrierHandler;
/**
* Tests getThreadAllocatedBytes(long id) function of com.sun.management.ThreadMXBean
* <p>
* - Test starts thread that does not allocate any additional memory and stores
* it's getThreadAllocatedBytes() result (value1)
* Then it starts several other threads that does allocate memory and, after these
* threads are finished, checks that getThreadAllocatedBytes() result (value2)
* does not differ from value1
*/
public class NoAllocationTest extends ThreadMXBeanTestBase {
private volatile boolean start = false;
private volatile boolean stop = false;
/**
* Actually runs the test
*/
public void run() {
if (threadMXBean == null)
return;
// No allocation TestThread thread.
// Run behavior : does nothing, waits for notify() call
MXBeanTestThread tr = new MXBeanTestThread() {
@Override
public void doWork() {
start = true;
while (!stop) { /* empty */ }
}
};
tr.start();
MXBeanTestThread tr1 = new MXBeanTestThread();
MXBeanTestThread tr2 = new MXBeanTestThread();
BarrierHandler handler = startThreads(tr1, tr2);
while (!start) { /* empty */ }
long value1 = threadMXBean.getThreadAllocatedBytes(tr.getId());
handler.proceed();
long value2 = threadMXBean.getThreadAllocatedBytes(tr.getId());
if (value1 != value2) {
throw new TestFailure("Failure! It is expected that idle thread "
+ "does not allocate any memory. getThreadAllocatedBytes() call "
+ "for idle TestThread-" + tr.getName() + " returns different "
+ "values. Recieved : " + value1 + " and " + value2);
}
log.info("NoAllocationTest passed.");
stop = true;
handler.finish();
}
/**
* Entry point for java program
* @param args sets the test configuration
*/
public static void main(String[] args) {
ThreadMXBeanTestBase test = new NoAllocationTest();
Monitoring.runTest(test, test.setGarbageProducer(args));
}
}
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