When to call code after the GC

Hello all,

What is the best place to call managed code after a GC? I tried to call
managed code after the
HELPER_METHOD_FRAME_END(); call in the
FCIMPL1(void, GCInterface::CollectGeneration, INT32 generation) method (in
the comutilnative.cpp file)
but it just keeps on firing assertions. I want to call managed code using
something like FFI. It would be great
to call the code I want from managed code but I don't know if it's possible.
Any ideas regarding a place in which I can call managed code safely after a
GC?

Thanks in advance for any help...

Ricardo Mendes
Distributed Systems Group
INESC-ID Lisbon, Portugal