1 /*
   2  * Copyright (c) 2011, 2012, 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  * @run main/othervm GcDuringExport
  34  */
  35 
  36 import java.rmi.Remote;
  37 import java.rmi.server.UnicastRemoteObject;
  38 
  39 public class GcDuringExport {
  40     private static final long MAX_EXPORT_ITERATIONS = 50000;
  41 
  42     public static void main(String[] args) throws Exception {
  43         Thread gcInducingThread = new Thread() {
  44             public void run() {
  45                 while (true) {
  46                     System.gc();
  47                     try { Thread.sleep(1); } catch (InterruptedException e) { }
  48                 }
  49             }
  50         };
  51         gcInducingThread.setDaemon(true);
  52         gcInducingThread.start();
  53 
  54         long i = 0;
  55         try {
  56             while (i < MAX_EXPORT_ITERATIONS) {
  57                 i++;
  58                 UnicastRemoteObject.exportObject(new Remote() { }, 0);
  59             }
  60         } catch (Throwable e) {
  61             throw new RuntimeException("Test FAILED on iteration " + i + ".", e);
  62         }
  63 
  64         System.out.println("Test successfully exported " + i + " objects.");
  65     }
  66 }