Hello,

Here's an updated bigcore.exp test.  I've now tested it on ppc, amd64, 
ia64, and i386 systems.

The test works by allocating (but not accessing all of) as much memory 
as possible, each allocated memory chunk inserted into a linked list. 
The test walks the linked list comparing the running image against an 
equivalent core file.

This new version:

- it's disabled on NetBSD
That system doesn't support sparse core files.  I suspect others will be 
added to the list.

- has a doublely linked list
Because ...

- limits the linked list walk to just the first 50 entries
I saw ~15000 chunks on one architecture

- walks starting at each end
Which hopefully ensures better coverage (since things are limited to 50 
entries)

So far the largest core file I've seen is 500gb.

Andrew