[Mono-dev] AppDomains

[Matthijs ter Woord]

Hi,

I'm the project coordinator of the NApf project. (see
http://www.codeplex.com/NApf)

For testing our project, we designed a special test harness, which starts
small test applications in separate AppDomains. To transfer test states back
to the "runner", the child domains get callback methods using the
AppDomain.SetData/GetData methods. Whe the SetData method gets called. I get
a very strange exception (all namespaces starting with NApf are ours):

----- START SNIPPET
Unhandled Exception: System.Reflection.TargetInvocationException: Exception
has been thrown by the target of an invocation.

Server stack trace:
  at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags
invokeAttr, System.Reflection.Binder binder, System.Object[] parameters,
System.Globalization.CultureInfo culture) [0x00000]
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[]
parameters) [0x00000]
  at System.Runtime.Serialization.ObjectRecord.LoadData
(System.Runtime.Serialization.ObjectManager manager, ISurrogateSelector
selector, StreamingContext context) [0x00000]
  at System.Runtime.Serialization.ObjectManager.DoFixups () [0x00000]
  at
System.Runtime.Serialization.Formatters.Binary.ObjectReader.ReadNextObject
(System.IO.BinaryReader reader) [0x00000]
  at
System.Runtime.Serialization.Formatters.Binary.ObjectReader.ReadObjectGraph
(System.IO.BinaryReader reader, Boolean readHeaders, System.Object& result,
System.Runtime.Remoting.Messaging.Header[]& headers) [0x00000]
  at
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.NoCheckDeserialize
(System.IO.Stream serializationStream,
System.Runtime.Remoting.Messaging.HeaderHandler handler) [0x00000]
  at
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize
(System.IO.Stream serializationStream) [0x00000]
  at System.Runtime.Remoting.RemotingServices.DeserializeCallData
(System.Byte[] array) [0x00000]
  at (wrapper xdomain-dispatch) System.AppDomain:SetData
(object,byte[]&,byte[]&,string)

Exception rethrown at [0]:
 ---> System.Runtime.Serialization.SerializationException: Serialization
will not deserialize delegates to non-public methods.
  at System.DelegateSerializationHolder+DelegateEntry.DeserializeDelegate
(System.Runtime.Serialization.SerializationInfo info) [0x00000]
  at System.DelegateSerializationHolder..ctor
(System.Runtime.Serialization.SerializationInfo info, StreamingContext ctx)
[0x00000]
  at <0x00000> <unknown method>
  at (wrapper managed-to-native)
System.Reflection.MonoCMethod:InternalInvoke (object,object[])
  at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags
invokeAttr, System.Reflection.Binder binder, System.Object[] parameters,
System.Globalization.CultureInfo culture) [0x00000] --- End of inner
exception stack trace ---

  at (wrapper xdomain-invoke) System.AppDomain:SetData (string,object)
  at (wrapper remoting-invoke-with-check) System.AppDomain:SetData
(string,object)
  at NApf.UnitTests.Runner.TestsRunner.WorkerThread () [0x00000]
----- END SNIPPET


What to do?

Regards,

Matthijs ter Woord