1 /* 2 * Copyright (c) 2018, 2020, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 import java.lang.instrument.Instrumentation; 25 26 public class SimpleAgent implements Runnable { 27 public static void premain(String agentArg, Instrumentation instrumentation) { 28 System.out.println("inside SimpleAgent"); 29 30 Thread t = new Thread(new SimpleAgent()); 31 t.setDaemon(true); 32 t.start(); 33 } 34 35 // Test for JDK-8249276: make sure we can handle objects that are locked during 36 // -Xshare:dump 37 public void run() { 38 try { 39 while (true) { 40 System.out.println("Let's wait ....."); 41 synchronized (Object.class) { 42 Object.class.wait(); 43 } 44 System.out.println("Huh?? notified??"); 45 } 46 } catch (Throwable t) { 47 System.err.println("Unexpected: " + t); 48 throw new RuntimeException(t); 49 } 50 } 51 }