1 /* 2 * Copyright 2014 Goldman Sachs. 3 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 */ 24 /* @test 25 * @bug 7142035 26 * @summary Assert in java.lang.instrument agents during shutdown when classloading occurs after shutdown 27 * @library /test/lib 28 * 29 * @modules java.instrument 30 * java.management 31 * @build DummyAgent DummyClass TestDaemonThreadLauncher TestDaemonThread 32 * @run shell ../MakeJAR3.sh DummyAgent 33 * @run main/timeout=240 TestDaemonThreadLauncher 34 * 35 */ 36 import java.io.File; 37 import java.net.URL; 38 import java.net.URLClassLoader; 39 40 public class TestDaemonThread implements Runnable{ 41 File classpath; 42 43 public TestDaemonThread(File classpath) { 44 this.classpath = classpath; 45 } 46 47 @Override 48 public void run() { 49 50 51 try { 52 URL u = this.getClass().getClassLoader().getResource("DummyClass.class"); 53 String path = u.getPath(); 54 String parent = u.getPath().substring(0, path.lastIndexOf('/')+1); 55 URL parentURL = new URL(u, parent); 56 System.out.println(parentURL); 57 /* Load lots of class by creating multiple classloaders */ 58 for(;;) { 59 ClassLoader cl = new URLClassLoader(new URL[] {parentURL}, null); 60 cl.loadClass("DummyClass"); 61 } 62 } catch (Exception e) { 63 e.printStackTrace(); 64 } 65 } 66 67 public static void main(String[] args) throws Exception { 68 Thread t = new Thread(new TestDaemonThread(new File(args[0]))); 69 /* The important part of the bug is that a Daemon thread can continue to load classes after shutdown */ 70 t.setDaemon(true); 71 t.start(); 72 Thread.sleep(200); 73 } 74 }