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.jfr.event.gc.collection; 27 28 import java.util.ArrayList; 29 import java.util.List; 30 31 /** 32 * Simple application to provoke various kinds of GC. 33 */ 34 public class AppGCProvoker { 35 36 private static List<byte[]> garbage = new ArrayList<>(); 37 public static Object trash; 38 39 public static void main(String args[]) { 40 // young gc 41 for (int i = 0; i < 100; i++) { 42 trash = new byte[100_000]; 43 } 44 45 // system gc 46 System.gc(); 47 48 // full gc caused by OOM 49 try { 50 while(true) { 51 garbage.add(new byte[150_000]); 52 } 53 } catch (OutOfMemoryError e) { 54 garbage = null; 55 } 56 } 57 }