* Add ThreadTracker Tests, Tests default thread, Adding Testing and Removing a thread, a dead thread, and a null Thread

* Fix a null thread situation

OpenSim/Framework/Tests/ThreadTrackerTests.cs

@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using NUnit.Framework;
+using System.Threading;
+using System.Collections.Generic;
+
+namespace OpenSim.Framework.Tests
+{
+    [TestFixture]
+    public class ThreadTrackerTests
+    {
+        private bool running = true;
+        private bool running2 = true;
+
+        [Test]
+        public void DefaultThreadTrackerTest()
+        {
+            List<Thread> lThread = ThreadTracker.GetThreads();
+            
+            /*
+            foreach (Thread t in lThread)
+            {
+                System.Console.WriteLine(t.Name);
+            }
+            */
+
+            Assert.That(lThread.Count == 1);
+            Assert.That(lThread[0].Name == "ThreadTrackerThread");
+        }
+
+        /// <summary>
+        /// Validate that adding a thread to the thread tracker works
+        /// Validate that removing a thread from the thread tracker also works.
+        /// </summary>
+        [Test]
+        public void AddThreadToThreadTrackerTestAndRemoveTest()
+        {
+            Thread t = new Thread(run);
+            t.Name = "TestThread";
+            t.Priority = ThreadPriority.BelowNormal;
+            t.IsBackground = true;
+            t.SetApartmentState(ApartmentState.MTA);
+            t.Start();
+            ThreadTracker.Add(t);
+
+            List<Thread> lThread = ThreadTracker.GetThreads();
+
+            Assert.That(lThread.Count == 2);
+
+            foreach (Thread tr in lThread)
+            {
+                Assert.That((tr.Name == "ThreadTrackerThread" || tr.Name == "TestThread"));
+            }
+            running = false;
+            ThreadTracker.Remove(t);
+
+            lThread = ThreadTracker.GetThreads();
+
+            Assert.That(lThread.Count == 1);
+
+            foreach (Thread tr in lThread)
+            {
+                Assert.That((tr.Name == "ThreadTrackerThread"));
+            }
+
+
+        }
+
+        /// <summary>
+        /// Test a dead thread removal by aborting it and setting it's last seen active date to 50 seconds
+        /// </summary>
+        [Test]
+        public void DeadThreadTest()
+        {
+            Thread t = new Thread(run2);
+            t.Name = "TestThread";
+            t.Priority = ThreadPriority.BelowNormal;
+            t.IsBackground = true;
+            t.SetApartmentState(ApartmentState.MTA);
+            t.Start();
+            ThreadTracker.Add(t);
+            t.Abort();
+            Thread.Sleep(5000);
+            ThreadTracker.m_Threads[1].LastSeenActive = DateTime.Now.Ticks - (50*10000000);
+            ThreadTracker.CleanUp();
+            List<Thread> lThread = ThreadTracker.GetThreads();
+
+            Assert.That(lThread.Count == 1);
+
+            foreach (Thread tr in lThread)
+            {
+                Assert.That((tr.Name == "ThreadTrackerThread"));
+            }
+        }
+
+        [Test]
+        public void UnstartedThreadTest()
+        {
+            Thread t = new Thread(run2);
+            t.Name = "TestThread";
+            t.Priority = ThreadPriority.BelowNormal;
+            t.IsBackground = true;
+            t.SetApartmentState(ApartmentState.MTA);
+            ThreadTracker.Add(t);
+            ThreadTracker.m_Threads[1].LastSeenActive = DateTime.Now.Ticks - (50 * 10000000);
+            ThreadTracker.CleanUp();
+            List<Thread> lThread = ThreadTracker.GetThreads();
+
+            Assert.That(lThread.Count == 1);
+
+            foreach (Thread tr in lThread)
+            {
+                Assert.That((tr.Name == "ThreadTrackerThread"));
+            }
+        }
+
+        [Test]
+        public void NullThreadTest()
+        {
+            Thread t = null;
+            ThreadTracker.Add(t);
+            
+            List<Thread> lThread = ThreadTracker.GetThreads();
+
+            Assert.That(lThread.Count == 1);
+
+            foreach (Thread tr in lThread)
+            {
+                Assert.That((tr.Name == "ThreadTrackerThread"));
+            }
+        }
+
+
+        /// <summary>
+        /// Worker thread 0
+        /// </summary>
+        /// <param name="o"></param>
+        public void run( object o)
+        {
+            while (running)
+            {
+                Thread.Sleep(5000);
+            }
+        }
+
+        /// <summary>
+        /// Worker thread 1
+        /// </summary>
+        /// <param name="o"></param>
+        public void run2(object o)
+        {
+            try
+            {
+                while (running2)
+                {
+                    Thread.Sleep(5000);
+                }
+
+            } 
+            catch (ThreadAbortException)
+            {
+            }
+        }
+
+    }
+}

OpenSim/Framework/ThreadTracker.cs

@@ -77,12 +77,15 @@ namespace OpenSim.Framework
         public static void Add(Thread thread)
         {
 #if DEBUG
-            lock (m_Threads)
+            if (thread != null)
             {
-                ThreadTrackerItem tti = new ThreadTrackerItem();
-                tti.Thread = thread;
-                tti.LastSeenActive = DateTime.Now.Ticks;
-                m_Threads.Add(tti);
+                lock (m_Threads)
+                {
+                    ThreadTrackerItem tti = new ThreadTrackerItem();
+                    tti.Thread = thread;
+                    tti.LastSeenActive = DateTime.Now.Ticks;
+                    m_Threads.Add(tti);
+                }
             }
 #endif
         }
@@ -107,16 +110,25 @@ namespace OpenSim.Framework
             {
                 foreach (ThreadTrackerItem tti in new ArrayList(m_Threads))
                 {
-                    if (tti.Thread.IsAlive)
+                    try
                     {
-                        // Its active
-                        tti.LastSeenActive = DateTime.Now.Ticks;
+                        
+                    
+                        if (tti.Thread.IsAlive)
+                        {
+                            // Its active
+                            tti.LastSeenActive = DateTime.Now.Ticks;
+                        }
+                        else
+                        {
+                            // Its not active -- if its expired then remove it
+                            if (tti.LastSeenActive + ThreadTimeout < DateTime.Now.Ticks)
+                                m_Threads.Remove(tti);
+                        }
                     }
-                    else
+                    catch (NullReferenceException)
                     {
-                        // Its not active -- if its expired then remove it
-                        if (tti.LastSeenActive + ThreadTimeout < DateTime.Now.Ticks)
-                            m_Threads.Remove(tti);
+                        m_Threads.Remove(tti);
                     }
                 }
             }