Expose an icall to report unhandled exceptions in mscorlib.

Author: TautvydasZilys

mcs/class/referencesource/mscorlib/system/exception.cs

@@ -1138,6 +1138,9 @@ internal Exception FixRemotingException ()
 
             return this;
         }
+		
+		[MethodImplAttribute(MethodImplOptions.InternalCall)]
+		internal static extern void ReportUnhandledException(Exception exception);
 #endif
     }
 

mcs/class/referencesource/mscorlib/system/threading/synchronizationcontext.cs

@@ -424,10 +424,17 @@ public override void Post(SendOrPostCallback d, object state)
         [MonoPInvokeCallback(typeof(InvocationEntryDelegate))]
         private static void InvocationEntry(IntPtr arg)
         {
-            var invocationContextHandle = GCHandle.FromIntPtr(arg);
-            var invocationContext = (InvocationContext)invocationContextHandle.Target;
-            invocationContextHandle.Free();
-            invocationContext.Invoke();
+			try
+			{
+				var invocationContextHandle = GCHandle.FromIntPtr(arg);
+				var invocationContext = (InvocationContext)invocationContextHandle.Target;
+				invocationContextHandle.Free();
+				invocationContext.Invoke();
+			}
+			catch (Exception e)
+			{
+				Exception.ReportUnhandledException(e);
+			}
         }
 
 		[AttributeUsage (AttributeTargets.Method)]

mono/metadata/exception.c

@@ -1533,3 +1533,10 @@ mono_error_convert_to_exception_handle (MonoError *error)
 	return is_ok (error) ? MONO_HANDLE_CAST (MonoException, NULL_HANDLE)
 		: MONO_HANDLE_NEW (MonoException, mono_error_convert_to_exception (error));
 }
+
+void
+ves_icall_System_Exception_ReportUnhandledException(MonoObject *exc)
+{
+	mono_unhandled_exception (exc);
+	mono_invoke_unhandled_exception_hook (exc);
+}

mono/metadata/exception.h

@@ -172,6 +172,9 @@ typedef void  (*MonoUnhandledExceptionFunc)         (MonoObject *exc, void *user
 MONO_API void mono_install_unhandled_exception_hook (MonoUnhandledExceptionFunc func, void *user_data);
 void          mono_invoke_unhandled_exception_hook  (MonoObject *exc);
 
+void
+ves_icall_System_Exception_ReportUnhandledException (MonoObject *exc);
+
 MONO_END_DECLS
 
 #endif /* _MONO_METADATA_EXCEPTION_H_ */

mono/metadata/icall-def.h

@@ -357,6 +357,9 @@ HANDLES(GC_7, "_SuppressFinalize", ves_icall_System_GC_SuppressFinalize, void, 1
 HANDLES(GC_9, "get_ephemeron_tombstone", ves_icall_System_GC_get_ephemeron_tombstone, MonoObject, 0, ())
 HANDLES(GC_8, "register_ephemeron_array", ves_icall_System_GC_register_ephemeron_array, void, 1, (MonoObject))
 
+ICALL_TYPE(EXCEPTION, "System.Exception", EXCEPTION_1)
+HANDLES(ICALL(EXCEPTION_1, "ReportUnhandledException", ves_icall_System_Exception_ReportUnhandledException))
+
 ICALL_TYPE(CALDATA, "System.Globalization.CalendarData", CALDATA_1)
 HANDLES(CALDATA_1, "fill_calendar_data", ves_icall_System_Globalization_CalendarData_fill_calendar_data, MonoBoolean, 3, (MonoCalendarData, MonoString, gint32))