| /* |
| * Copyright (c) 2010, 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.mlvm.share; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| /** |
| * The base class for Mlvm tests checking various OOM Errors. |
| * Subclasses are expected to implement {@link #eatMemory(List)}/ |
| * {@link checkOOME(OutOfMemoryError)} methods consuming memory in various ways. |
| */ |
| public abstract class MlvmOOMTest extends MlvmTest { |
| private static Object garbage; |
| |
| /** |
| * A template method. |
| * Implements logic of the tests: |
| * consumes memory in loop until OOM is thrown, checks the OOM type. |
| */ |
| @Override |
| public final boolean run() { |
| Env.display("Test started."); |
| LinkedList<Object> objects = new LinkedList<Object>(); |
| // to trick EA |
| garbage = objects; |
| try { |
| eatMemory(objects); |
| } catch (OutOfMemoryError oome) { |
| objects.clear(); |
| Env.display("Caught OOME : " + oome.getMessage()); |
| checkOOME(oome); |
| return true; |
| } |
| throw new RuntimeException("TEST FAIL : no OOME"); |
| } |
| |
| /** |
| * Consumes memory. |
| * Subclasses implement their logic of memory consuming. Created objects are expected |
| * to be stored in the given parameter. |
| * The normal termination of the method is throwing OOM exception, which will be checked |
| * by the {@link #checkOOME(OutOfMemoryError)} |
| * Not throwing the OOM will be interpreted as test failure. |
| * @param garbage a list to store generated garbage |
| */ |
| protected abstract void eatMemory(List<Object> garbage); |
| |
| /** |
| * Checks the OOME type is expected. |
| * Method just exits if OOME is expected and throws an exeption if not. |
| * @param oome thrown by {@link #eatMemory(List)} |
| */ |
| protected abstract void checkOOME(OutOfMemoryError oome); |
| } |