1 /*
   2  * Copyright (c) 2008, 2017, 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 4607272
  27  * @summary tests tasks can be submitted to a channel group's thread pool.
  28  * @library /lib/testlibrary bootlib
  29  * @build JarUtils PrivilegedThreadFactory Attack
  30  * @run driver SetupJar
  31  * @run main/othervm -Xbootclasspath/a:privileged.jar AsExecutor
  32  */
  33 
  34 import java.nio.channels.AsynchronousChannelGroup;
  35 import java.util.concurrent.CountDownLatch;
  36 import java.util.concurrent.Executor;
  37 import java.util.concurrent.Executors;
  38 import java.util.concurrent.ThreadFactory;
  39 
  40 public class AsExecutor {
  41 
  42     public static void main(String[] args) throws Exception {
  43         // create channel groups
  44         ThreadFactory factory = new PrivilegedThreadFactory();
  45         AsynchronousChannelGroup group1 = AsynchronousChannelGroup
  46             .withFixedThreadPool(5, factory);
  47         AsynchronousChannelGroup group2 = AsynchronousChannelGroup
  48             .withCachedThreadPool(Executors.newCachedThreadPool(factory), 0);
  49         AsynchronousChannelGroup group3 = AsynchronousChannelGroup
  50             .withThreadPool(Executors.newFixedThreadPool(10, factory));
  51 
  52         try {
  53             // execute simple tasks
  54             testSimpleTask(group1);
  55             testSimpleTask(group2);
  56             testSimpleTask(group3);
  57 
  58             // install security manager and test again
  59             System.setSecurityManager( new SecurityManager() );
  60             testSimpleTask(group1);
  61             testSimpleTask(group2);
  62             testSimpleTask(group3);
  63 
  64             // attempt to execute tasks that run with only frames from boot
  65             // class loader on the stack.
  66             testAttackingTask(group1);
  67             testAttackingTask(group2);
  68             testAttackingTask(group3);
  69         } finally {
  70             group1.shutdown();
  71             group2.shutdown();
  72             group3.shutdown();
  73         }
  74     }
  75 
  76     static void testSimpleTask(AsynchronousChannelGroup group) throws Exception {
  77         Executor executor = (Executor)group;
  78         final CountDownLatch latch = new CountDownLatch(1);
  79         executor.execute(new Runnable() {
  80             public void run() {
  81                 latch.countDown();
  82             }
  83         });
  84         latch.await();
  85     }
  86 
  87     static void testAttackingTask(AsynchronousChannelGroup group) throws Exception {
  88         Executor executor = (Executor)group;
  89         Attack task = new Attack();
  90         executor.execute(task);
  91         task.waitUntilDone();
  92         if (!task.failedDueToSecurityException())
  93             throw new RuntimeException("SecurityException expected");
  94     }
  95 
  96 }