Add a Field to java.lang.Object

Hi

I'm trying to add an new extra field into java.lang.Object. I need that
to do some memory synchronization via Network.

If I just insert the new Field in libjava/java/lang/Object.h (access
form the Java World is not needed) I get a segmentation fault whenever I
try to run a Java Software using that Object.h. (It does no matter
whether I add it to _JvObjectPrefix or java::lang::Object)

If the JV_HASH_SYNCHRONIZATION Preprocessor Variable is not defined an
extra Filed sync_info gets inserted in Object.h.
But everywhere where extra Code is inserted depending on
JV_HASH_SYNCHRONIZATION it seems to deal with whether or not the Garbage
Collector needs to scan the Object.

If I add the Field in libjava/java/lang/Object.java I get a compile
Error when I compile gcj:
../../../../gcc-src/libjava/java/lang/Object.java:517:0: internal
compiler error: Segmentation fault



What extra change is needed after adding a Filed to Object?


Thanks for your Help
Noah