implemented OnException handler

(cherry picked from commit c5583ba)

Author: ArseniiCherniaev

Mono.Debugging.Win32/CorDebuggerSession.cs

@@ -270,6 +270,7 @@ void SetupProcess (CorProcess corProcess)
 			corProcess.OnEvalException += OnEvalException;
 			corProcess.OnLogMessage += OnLogMessage;
 			corProcess.OnException2 += OnException2;
+			corProcess.OnException += OnException;
 			corProcess.RegisterStdOutput (OnStdOutput);
 		}
 
@@ -821,6 +822,32 @@ void OnException2 (object sender, CorException2EventArgs e)
 			}
 		}
 
+		private void OnException (object sender, CorExceptionEventArgs e)
+		{
+			lock (debugLock) {
+				if (evaluating) {
+					e.Continue = true;
+					return;
+				}
+			}
+
+			TargetEventArgs args = new TargetEventArgs (
+				e.Unhandled? TargetEventType.UnhandledException: TargetEventType.ExceptionThrown);
+
+			OnStopped ();
+			e.Continue = false;
+			// If an exception is thrown while stepping, cancel the stepping operation
+			if (stepper != null && stepper.IsActive ())
+				stepper.Deactivate ();
+			autoStepInto = false;
+			SetActiveThread (e.Thread);
+
+			args.Process = GetProcess (process);
+			args.Thread = GetThread (e.Thread);
+			args.Backtrace = new Backtrace (new CorBacktrace (e.Thread, this));
+			OnTargetEvent (args);
+		}
+
 		public bool IsExternalCode (string fileName)
 		{
 			if (string.IsNullOrWhiteSpace (fileName))