Fixed Forum-8642(asl): Do not evaluate when native frame is on top of stack

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@1534 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Misc/Debugger/Debugger.Core/Project/Src/Debugger/NDebugger.cs

@@ -135,6 +135,7 @@ namespace Debugger
 			pauseSession = null;
 			
 			pendingEvalsCollection.Clear();
+			evaluating = false;
 			
 			TraceMessage("Reset done");
 			

src/AddIns/Misc/Debugger/Debugger.Core/Project/Src/Threads/Thread.cs

@@ -330,5 +330,12 @@ namespace Debugger
 				return null;
 			}
 		}
+		
+		public bool IsLastFunctionNative {
+			get {
+				process.AssertPaused();
+				return corThread.ActiveChain.IsManaged == 0;
+			}
+		}
 	}
 }

src/AddIns/Misc/Debugger/Debugger.Core/Project/Src/Variables/Evals/Eval.cs

@@ -116,6 +116,15 @@ namespace Debugger
 		{
 			debugger.AssertPaused();
 			
+			if (targetThread.IsLastFunctionNative) {
+				error = "Can not evaluate because native frame is on top of stack";
+				evalState = EvalState.Error;
+				if (EvalComplete != null) {
+					EvalComplete(this, new EvalEventArgs(this));
+				}
+				return false;
+			}
+			
 			ICorDebugValue[] args = getArgs();
 			
 			if (args == null) {