Implemented a Watchdog class. Do not manually create Thread objects anymore, use Watchdog.StartThread(). While your thread is running call Watchdog.UpdateThread(). When it is shutting down call Watchdog.RemoveThread(). Most of the threads in OpenSim have been updated

OpenSim/Region/Application/OpenSim.cs

@@ -172,6 +172,9 @@ namespace OpenSim
                 m_scriptTimer.Elapsed += RunAutoTimerScript;
             }
 
+            // Hook up to the watchdog timer
+            Watchdog.OnWatchdogTimeout += WatchdogTimeoutHandler;
+
             PrintFileToConsole("startuplogo.txt");
 
             // For now, start at the 'root' level by default
@@ -384,6 +387,14 @@ namespace OpenSim
             }
         }
 
+        private void WatchdogTimeoutHandler(System.Threading.Thread thread, int lastTick)
+        {
+            int now = Environment.TickCount & Int32.MaxValue;
+
+            m_log.ErrorFormat("[WATCHDOG]: Timeout detected for thread \"{0}\". ThreadState={1}. Last tick was {2}ms ago",
+                thread.Name, thread.ThreadState, now - lastTick);
+        }
+
         #region Console Commands
 
         /// <summary>