Note: at this point I'm more interested in knowing why the process cored
rather than how it got to that point. Not unlike a doctor doing an
autopsy: I appear to be examining a very healthy patient except for the
fact that he's dead. I want, first, to know why he's dead. Then I'll
figure out how he got killed.
One way to get this is if you mmap a file, and that file is
subsequently truncated. You get SIGBUS when trying to prod bits of
your address space where the pages have been stolen out from under