77 lines
2.8 KiB
Java
77 lines
2.8 KiB
Java
/*
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* Copyright (c) 2010, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package vm.mlvm.share;
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import java.util.LinkedList;
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import java.util.List;
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/**
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* The base class for Mlvm tests checking various OOM Errors.
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* Subclasses are expected to implement {@link #eatMemory(List)}/
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* {@link checkOOME(OutOfMemoryError)} methods consuming memory in various ways.
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*/
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public abstract class MlvmOOMTest extends MlvmTest {
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private static Object garbage;
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/**
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* A template method.
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* Implements logic of the tests:
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* consumes memory in loop until OOM is thrown, checks the OOM type.
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*/
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@Override
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public final boolean run() {
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Env.display("Test started.");
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LinkedList<Object> objects = new LinkedList<Object>();
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// to trick EA
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garbage = objects;
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try {
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eatMemory(objects);
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} catch (OutOfMemoryError oome) {
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objects.clear();
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Env.display("Caught OOME : " + oome.getMessage());
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checkOOME(oome);
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return true;
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}
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throw new RuntimeException("TEST FAIL : no OOME");
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}
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/**
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* Consumes memory.
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* Subclasses implement their logic of memory consuming. Created objects are expected
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* to be stored in the given parameter.
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* The normal termination of the method is throwing OOM exception, which will be checked
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* by the {@link #checkOOME(OutOfMemoryError)}
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* Not throwing the OOM will be interpreted as test failure.
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* @param garbage a list to store generated garbage
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*/
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protected abstract void eatMemory(List<Object> garbage);
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/**
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* Checks the OOME type is expected.
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* Method just exits if OOME is expected and throws an exeption if not.
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* @param oome thrown by {@link #eatMemory(List)}
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*/
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protected abstract void checkOOME(OutOfMemoryError oome);
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}
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