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Re: possible mmap() problems


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


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