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/*
* Copyright (c) 2013, 2021, 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 metaspace.share;
import nsk.share.test.ExecutionController;
import nsk.share.gc.gp.classload.GeneratedClassProducer;
public class TriggerUnloadingByFillingMetaspace implements
TriggerUnloadingHelper {
private volatile boolean gotOOME = false;
private ExecutionController stresser;
private final ThreadLocal<GeneratedClassProducer> generatedClassProducer =
new ThreadLocal<GeneratedClassProducer>() {
@Override
protected GeneratedClassProducer initialValue() {
return new GeneratedClassProducer("metaspace.stressHierarchy.common.HumongousClass");
}
};
private static boolean isInMetaspace(Throwable error) {
return (error.getMessage().trim().toLowerCase().contains("metaspace"));
}
@Override
public void triggerUnloading(ExecutionController stresser) {
while (stresser.continueExecution() && !gotOOME) {
try {
generatedClassProducer.get().create(-100500); //argument is not used.
} catch (Throwable oome) {
if (!isInMetaspace(oome)) {
throw new HeapOOMEException("Got OOME in heap while triggering OOME in metaspace. Test result can't be valid.");
}
gotOOME = true;
}
}
}
}
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