possible mmap() problems

[Joe Buehler]

Christopher Faylor wrote:

> If it's predictable where the page is, then I wonder if you could set a
> hardware watchpoint to catch when it is happening?  Or maybe even strace
> would tell you.

It's a hard one.  I have a build that fails randomly.  On one run,
out of 51 errors (handle_exceptions) caught by strace, 49 of them
happened right after a pipe close.  I believe that they all did happen
at the same address.  Adding strace printfs for Virtual* calls caused
the problem to (apparently) go away (sigh).

I assume I can't use hardware watchpoints because there are lots and lots
of processes coming and going while the build is going on, and no apparent
rhyme or reason to the problem.
-- 
Joe Buehler