Add ExceptionHelpers.ReportUnhandledError (#247)

WinRT.Runtime/ExceptionHelpers.cs

@@ -33,6 +33,9 @@ public static class ExceptionHelpers
  internal delegate int RoOriginateLanguageException(int error, IntPtr message, IntPtr langaugeException);
  private static RoOriginateLanguageException roOriginateLanguageException;
 
+ internal delegate int RoReportUnhandledError(IntPtr pRestrictedErrorInfo);
+ private static RoReportUnhandledError roReportUnhandledError;
+
  static ExceptionHelpers()
  {
  IntPtr winRTErrorModule = Platform.LoadLibraryExW("api-ms-win-core-winrt-error-l1-1-1.dll", IntPtr.Zero, (uint)DllImportSearchPath.System32);
@@ -41,6 +44,7 @@ static ExceptionHelpers()
  getRestrictedErrorInfo = Platform.GetProcAddress<GetRestrictedErrorInfo>(winRTErrorModule);
  setRestrictedErrorInfo = Platform.GetProcAddress<SetRestrictedErrorInfo>(winRTErrorModule);
  roOriginateLanguageException = Platform.GetProcAddress<RoOriginateLanguageException>(winRTErrorModule);
+ roReportUnhandledError = Platform.GetProcAddress<RoReportUnhandledError>(winRTErrorModule);
  }
  else
  {
@@ -175,7 +179,10 @@ public static unsafe void SetErrorInfo(Exception ex)
  // as our error so as to propagate the error through WinRT end-to-end.
  if (ex.TryGetRestrictedLanguageErrorObject(out var restrictedErrorObject))
  {
- setRestrictedErrorInfo(restrictedErrorObject.GetRef());
+ using (restrictedErrorObject)
+ {
+ setRestrictedErrorInfo(restrictedErrorObject.ThisPtr);
+ }
  }
  else
  {
@@ -203,6 +210,17 @@ public static unsafe void SetErrorInfo(Exception ex)
  }
  }
 
+ public static void ReportUnhandledError(Exception ex)
+ {
+ SetErrorInfo(ex);
+ if (getRestrictedErrorInfo != null && roReportUnhandledError != null)
+ {
+ Marshal.ThrowExceptionForHR(getRestrictedErrorInfo(out IntPtr ppRestrictedErrorInfo));
+ using var restrictedErrorRef = ObjectReference<IUnknownVftbl>.Attach(ref ppRestrictedErrorInfo);
+ roReportUnhandledError(restrictedErrorRef.ThisPtr);
+ }
+ }
+
  public static int GetHRForException(Exception ex)
  {
  int hr = ex.HResult;