1 /* 2 * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.testlibrary.jfr; 27 28 import java.util.List; 29 import java.util.LinkedList; 30 31 /** 32 * Helper class which triggers and handles out of memory error to generate 33 * JFR events 34 */ 35 public class OOMApp { 36 37 public static List<DummyObject> dummyList; 38 39 public static void main(String[] args) { 40 int bytesToAllocate; 41 42 if (args.length > 0) { 43 bytesToAllocate = Integer.parseInt(args[0]); 44 } else { 45 bytesToAllocate = 1024; 46 } 47 System.gc(); 48 dummyList = new LinkedList<DummyObject>(); 49 System.out.println("## Initiate OOM ##"); 50 try { 51 while (true) { 52 dummyList.add(new DummyObject(bytesToAllocate)); 53 } 54 } catch (OutOfMemoryError e) { 55 System.out.println("## Got OOM ##"); 56 dummyList = null; 57 } 58 System.gc(); 59 } 60 61 public static class DummyObject { 62 public byte[] payload; 63 64 DummyObject(int bytesToAllocate) { 65 payload = new byte[bytesToAllocate]; 66 } 67 } 68 }