* Restaring the sim works fine in grid mode now. Sims announce themselves to their neighbors when they start up. Neighbors get this message and tell their agents that there's a new sim up.

* Certain unrecoverable physics based crashes in ODE are now hooked up to the 'restart the sim' routine.

2 files changed, 35 insertions, 4 deletions

diff --git a/OpenSim/Region/Physics/Manager/PhysicsScene.cs b/OpenSim/Region/Physics/Manager/PhysicsScene.cs
index 651992c..635b208 100644
--- a/OpenSim/Region/Physics/Manager/PhysicsScene.cs
+++ b/OpenSim/Region/Physics/Manager/PhysicsScene.cs
@@ -32,12 +32,29 @@ using OpenSim.Region.Physics.Manager;
 
 namespace OpenSim.Region.Physics.Manager
 {
+    public delegate void physicsCrash();
+
     public abstract class PhysicsScene
     {
+        // The only thing that should register for this event is the InnerScene
+        // Anything else could cause problems.
+
+        public event physicsCrash OnPhysicsCrash;
+
         public static PhysicsScene Null
         {
             get { return new NullPhysicsScene(); }
         }
+        public virtual void TriggerPhysicsBasedRestart()
+        {
+            physicsCrash handler = OnPhysicsCrash;
+            if (handler != null)
+            {
+                OnPhysicsCrash();
+            }
+            
+        }
+        
 
         public abstract void Initialise(IMesher meshmerizer);
 
diff --git a/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs b/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
index ec7d04d..7193886 100644
--- a/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
+++ b/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
@@ -32,6 +32,7 @@ using Axiom.Math;
 using Ode.NET;
 using OpenSim.Framework;
 using OpenSim.Region.Physics.Manager;
+
 //using OpenSim.Region.Physics.OdePlugin.Meshing;
 
 namespace OpenSim.Region.Physics.OdePlugin
@@ -234,9 +235,16 @@ namespace OpenSim.Region.Physics.OdePlugin
                     //System.Console.WriteLine("near: A collision was detected between {1} and {2}", 0, name1, name2);
                 }
                 
-                int count;
-                
+                int count = 0;
+                try
+                {
                     count = d.Collide(g1, g2, contacts.GetLength(0), contacts, d.ContactGeom.SizeOf);
+                }
+                catch (System.Runtime.InteropServices.SEHException)
+                {
+                    OpenSim.Framework.Console.MainLog.Instance.Error("PHYSICS", "The Operating system shut down ODE because of corrupt memory.  This could be a result of really irregular terrain.  If this repeats continuously, restart using Basic Physics and terrain fill your terrain.  Restarting the sim.");
+                    base.TriggerPhysicsBasedRestart();
+                }
              
                 for (int i = 0; i < count; i++)
                 {
@@ -805,8 +813,14 @@ namespace OpenSim.Region.Physics.OdePlugin
                 {
                 // Process 10 frames if the sim is running normal..  
                 // process 5 frames if the sim is running slow
-                d.WorldSetQuickStepNumIterations(world, m_physicsiterations);
-
+                    try{
+                        d.WorldSetQuickStepNumIterations(world, m_physicsiterations);
+                    }
+                    catch (System.StackOverflowException)
+                    {
+                        OpenSim.Framework.Console.MainLog.Instance.Error("PHYSICS", "The operating system wasn't able to allocate enough memory for the simulation.  Restarting the sim.");
+                        base.TriggerPhysicsBasedRestart();
+                    }
 
                 int i = 0;
                 while (step_time > 0.0f)