1 /*
   2  * Copyright (c) 2009, 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  * @test
  26  * @bug 6636650
  27  * @summary Uninitialized class loaders should not be a parent of other
  28  *          class loaders.
  29  * @run main/othervm UninitializedParent
  30  */
  31 
  32 
  33 import java.net.*;
  34 
  35 public class UninitializedParent {
  36     private static ClassLoader loader;
  37     public static void main(String[] args) throws Exception {
  38         System.setSecurityManager(new SecurityManager());
  39 
  40         // Create an uninitialized class loader
  41         try {
  42             new ClassLoader(null) {
  43                 @Override
  44                 protected void finalize() {
  45                     loader = this;
  46                 }
  47             };
  48         } catch (SecurityException exc) {
  49             // Expected
  50         }
  51         System.gc();
  52         System.runFinalization();
  53 
  54         // if 'loader' isn't null, need to ensure that it can't be used as
  55         // parent
  56         if (loader != null) {
  57             try {
  58                 // Create a class loader with 'loader' being the parent
  59                 URLClassLoader child = URLClassLoader.newInstance
  60                     (new URL[0], loader);
  61                 throw new RuntimeException("Test Failed!");
  62             } catch (SecurityException se) {
  63                 System.out.println("Test Passed: Exception thrown");
  64             }
  65         } else {
  66             System.out.println("Test Passed: Loader is null");
  67         }
  68     }
  69 }