I2JAV11 — How to create marshalel data of java.lang.Throwable instance?

I don't understand that how to create marshaled data of
java.lang.Throwable instance to set it to context_data in
UnknownExceptionInfo.

In CORBA 2.3.1, section "13.6.7 Object Service Context" on 13-25 page
says:

UnknownExceptionInfo identifies a CDR encapsulation of a marshaled instance
of a java.lang.throwable or one of its subclasses as described in Java
to IDL Language Mapping, Section 1.4.8.1, "Mapping of UnknownExceptionInfo
Service Context," on page 1-32.

In Java to IDL Language Mapping specification revised by RTF
(ptc/99-03-09), section "28.4.8.1 Mapping of UnknownExceptionInfo
Service Context" on page 28-32 says:

CORBA UNKNOWN exceptions whose GIOP Reply message includes an
UnknownExceptionInfo service context containing a marshaled
instance of java.lang.Throwable or one of its subclasses are mapped
to RMI exceptions according to the type of the object contained in
the service context, as shown in follows:
-------------------------------------------------------------------
UnknownExceptionInfo RMI Exception
-------------------------------------------------------------------
java.lang.Error java.rmi.ServerError
java.rmi.RemoteException java.rmi.ServerException
java.lang.RuntimeException java.rmi.ServerRuntimeException(JDK 1.1)
java.lang.RuntimeException(Java 2)
-------------------------------------------------------------------

It seems to me that these specifications above are not clear. How to
create the context_data from java.lang.Throwable instance? I guess the
context_data should be created by one of following two ways. Which way
is correct? Or is there any other correct way?

1. A instance of java.lang.Throwable or its subclasses should be
serialized by Java language specific serialization function and then
should be set to the context_data as sequence of octet.

2. A instance of java.lang.Throwable or its subclasses should be
marshaled as CORBA Value type data and then should be set to the
context_data as sequence of octet.

see revised text below