| /* |
| * Copyright (c) 2013, 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 vm.share.gc; |
| |
| import java.util.ArrayList; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| |
| import metaspace.stressHierarchy.common.exceptions.GotWrongOOMEException; |
| import nsk.share.gc.gp.classload.GeneratedClassProducer; |
| import nsk.share.test.ExecutionController; |
| |
| public class TriggerUnloadingByFillingMetaspace implements |
| TriggerUnloadingHelper { |
| |
| private static final int NUMBER_OF_THREADS = 30; |
| |
| private static class FillMetaspace { |
| private volatile boolean gotOOME = false; |
| private ExecutionController stresser; |
| private GeneratedClassProducer generatedClassProducer = new GeneratedClassProducer("metaspace.stressHierarchy.common.HumongousClass"); |
| |
| public FillMetaspace(ExecutionController stresser) { this.stresser = stresser; } |
| |
| private class FillMetaspaceTask implements Callable<Object> { |
| @Override |
| public Object call() throws Exception { |
| while (stresser.continueExecution() && ! gotOOME) { |
| try { |
| generatedClassProducer.create(-100500); //argument is not used. |
| } catch (OutOfMemoryError oome) { |
| if (!isInMetaspace(oome)) { |
| throw new GotWrongOOMEException("Got OOME in heap while gaining OOME in metaspace. Test result can't be valid."); |
| } |
| gotOOME = true; |
| } |
| } |
| return null; |
| } |
| } |
| } |
| |
| private static boolean isInMetaspace(OutOfMemoryError error) { |
| return error.getMessage().trim().toLowerCase().contains("metadata"); |
| } |
| |
| @Override |
| public void triggerUnloading(ExecutionController stresser) { |
| try { |
| FillMetaspace fillMetaspace = new FillMetaspace(stresser); |
| ArrayList<Callable<Object>> tasks = new ArrayList<Callable<Object>>(NUMBER_OF_THREADS); |
| for (int i = 0; i < NUMBER_OF_THREADS; i++) { |
| tasks.add(fillMetaspace.new FillMetaspaceTask()); |
| } |
| ExecutorService executorService = Executors.newCachedThreadPool(); |
| try { |
| executorService.invokeAll(tasks); |
| } catch (InterruptedException e) { |
| System.out.println("Process of gaining OOME in metaspace was interrupted."); |
| e.printStackTrace(); |
| } |
| } catch (OutOfMemoryError e) { |
| if (!isInMetaspace(e)) { |
| throw new GotWrongOOMEException("Got OOME in heap while gaining OOME in metaspace. Test result can't be valid."); |
| } |
| return; |
| } |
| } |
| |
| } |