1 /*
   2  * Copyright (c) 2011 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 /* 
  25  * Portions Copyright (c) 2011 IBM Corporation 
  26  */
  27 
  28 /*
  29  * @test
  30  * @bug 6597112
  31  * @summary GC'ing objects whilst being exported to RMI should not cause exceptions
  32  * @author Neil Richards <neil.richards@ngmr.net>, <neil_richards@uk.ibm.com>
  33  */
  34 
  35 import java.rmi.Remote;
  36 import java.rmi.server.UnicastRemoteObject;
  37 
  38 public class GcDuringExport {
  39     private static final long MAX_EXPORT_ITERATIONS = 50000;
  40 
  41     public static void main(String[] args) throws Exception {
  42         Thread gcInducingThread = new Thread() {
  43             public void run() { 
  44                 while (true) {
  45                     System.gc();
  46                     try { Thread.sleep(1); } catch (InterruptedException e) { }
  47                 }
  48             }
  49         };
  50         gcInducingThread.setDaemon(true);
  51         gcInducingThread.start();
  52 
  53         long i = 0;
  54         try {
  55             while (i < MAX_EXPORT_ITERATIONS) {
  56                 i++;
  57                 UnicastRemoteObject.exportObject(new Remote() { }, 0);
  58             }
  59         } catch (Throwable e) {
  60             throw new RuntimeException("Test FAILED on iteration " + i + ".", e);
  61         }
  62 
  63         System.out.println("Test successfully exported " + i + " objects.");
  64     }
  65 }
  66 
  67