--- /dev/null 2019-02-07 20:54:51.336000000 +0300 +++ new/test/jdk/jfr/event/gc/detailed/OOMApp.java 2019-02-08 18:33:18.852669986 +0300 @@ -0,0 +1,68 @@ +/* + * Copyright (c) 2016, 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. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * 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 jdk.jfr.event.gc.detailed; + +import java.util.List; +import java.util.LinkedList; + +/** + * Helper class which triggers and handles out of memory error to generate + * JFR events + */ +public class OOMApp { + + public static List dummyList; + + public static void main(String[] args) { + int bytesToAllocate; + + if (args.length > 0) { + bytesToAllocate = Integer.parseInt(args[0]); + } else { + bytesToAllocate = 1024; + } + System.gc(); + dummyList = new LinkedList(); + System.out.println("## Initiate OOM ##"); + try { + while (true) { + dummyList.add(new DummyObject(bytesToAllocate)); + } + } catch (OutOfMemoryError e) { + System.out.println("## Got OOM ##"); + dummyList = null; + } + System.gc(); + } + + public static class DummyObject { + public byte[] payload; + + DummyObject(int bytesToAllocate) { + payload = new byte[bytesToAllocate]; + } + } +}