Help tracking down cause of Hunchentoot crashes

I'm trying to debug an infrequently occurring crash of a Hunchentoot
server. The logs show nothing and there are no error messages. It's
died three times in the last week after running continuously for
months before that. 

I suspect it might be a heap-stack collision and have increased the
dynamic-space-size of the core image accordingly. It might be helpful
if I could periodically log the current status of the stack and heap
in some way. Is this possible? It might help me rule out this as the
problem or otherwise provide some hints as to what's causing it.

I'd appreciate any suggestions.

-- Jeff