549731dc2f
Reviewed-by: alanb, mchung
131 lines
5.4 KiB
Java
131 lines
5.4 KiB
Java
/*
|
|
* Copyright (c) 2011, 2015, 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.
|
|
*/
|
|
|
|
/*
|
|
* @test
|
|
* @bug 7036199
|
|
* @summary Check that GarbageCollection notification are thrown by every GarbageCollectorMXBean
|
|
* @author Frederic Parain
|
|
* @requires vm.opt.ExplicitGCInvokesConcurrent == null | vm.opt.ExplicitGCInvokesConcurrent == false
|
|
* @modules jdk.management
|
|
* @run main/othervm GarbageCollectionNotificationTest
|
|
*/
|
|
|
|
import java.util.*;
|
|
import java.lang.management.*;
|
|
import java.lang.reflect.*;
|
|
import javax.management.*;
|
|
import javax.management.openmbean.*;
|
|
import com.sun.management.GarbageCollectionNotificationInfo;
|
|
import com.sun.management.GcInfo;
|
|
import java.security.AccessController;
|
|
import java.security.PrivilegedAction;
|
|
import java.lang.reflect.Field;
|
|
|
|
public class GarbageCollectionNotificationTest {
|
|
private static HashMap<String,Boolean> listenerInvoked = new HashMap<String,Boolean>();
|
|
static volatile long count = 0;
|
|
static volatile long number = 0;
|
|
static Object synchronizer = new Object();
|
|
|
|
static class GcListener implements NotificationListener {
|
|
public void handleNotification(Notification notif, Object handback) {
|
|
String type = notif.getType();
|
|
if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
|
|
GarbageCollectionNotificationInfo gcNotif =
|
|
GarbageCollectionNotificationInfo.from((CompositeData) notif.getUserData());
|
|
String source = ((ObjectName)notif.getSource()).getCanonicalName();
|
|
synchronized(synchronizer) {
|
|
if(!listenerInvoked.get(source)) {
|
|
listenerInvoked.put(((ObjectName)notif.getSource()).getCanonicalName(),true);
|
|
count++;
|
|
if(count >= number) {
|
|
synchronizer.notify();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
|
|
final Boolean isNotificationSupported = AccessController.doPrivileged (new PrivilegedAction<Boolean>() {
|
|
public Boolean run() {
|
|
try {
|
|
Class cl = Class.forName("sun.management.VMManagementImpl");
|
|
Field f = cl.getDeclaredField("gcNotificationSupport");
|
|
f.setAccessible(true);
|
|
return f.getBoolean(null);
|
|
} catch(ClassNotFoundException e) {
|
|
return false;
|
|
} catch(NoSuchFieldException e) {
|
|
return false;
|
|
} catch(IllegalAccessException e) {
|
|
return false;
|
|
}
|
|
}
|
|
});
|
|
if(!isNotificationSupported) {
|
|
System.out.println("GC Notification not supported by the JVM, test skipped");
|
|
return;
|
|
}
|
|
final ObjectName gcMXBeanPattern =
|
|
new ObjectName("java.lang:type=GarbageCollector,*");
|
|
Set<ObjectName> names =
|
|
mbs.queryNames(gcMXBeanPattern, null);
|
|
if (names.isEmpty())
|
|
throw new Exception("Test incorrect: no GC MXBeans");
|
|
number = names.size();
|
|
for (ObjectName n : names) {
|
|
if(mbs.isInstanceOf(n,"javax.management.NotificationEmitter")) {
|
|
listenerInvoked.put(n.getCanonicalName(),false);
|
|
GcListener listener = new GcListener();
|
|
mbs.addNotificationListener(n, listener, null, null);
|
|
}
|
|
}
|
|
// Invocation of System.gc() to trigger major GC
|
|
System.gc();
|
|
// Allocation of many short living and small objects to trigger minor GC
|
|
Object data[] = new Object[32];
|
|
for(int i = 0; i<100000000; i++) {
|
|
data[i%32] = new int[8];
|
|
}
|
|
int wakeup = 0;
|
|
synchronized(synchronizer) {
|
|
while(count != number) {
|
|
synchronizer.wait(10000);
|
|
wakeup++;
|
|
if(wakeup > 10)
|
|
break;
|
|
}
|
|
}
|
|
for (String source : listenerInvoked.keySet()) {
|
|
if(!listenerInvoked.get(source))
|
|
throw new Exception("Test incorrect: notifications have not been sent for "
|
|
+ source);
|
|
}
|
|
System.out.println("Test passed");
|
|
}
|
|
}
|