memprof problem found

[Allin Cottrell <cottrell wfu edu>]

On Wed, 26 Oct 2005, Allin Cottrell wrote:

> I think I've tracked down where the hang is occurring, using memprof with 
> glibc 2.3.5 on Linux 2.6.13.4 (though I don't undestand _why_ it's 
> occurring).

Apologies for replying to myself, but here's the solution.  Glibc 
versions up to 2.3.3 implemented backtrace() without using malloc(), 
but from 2.3.4 onward backtrace calls malloc indirectly, which 
screws memprof.  See

http://sources.redhat.com/bugzilla/show_bug.cgi?id=956

A workaround is to undef HAVE_BACKTRACE in memprof's config.h.

Allin Cottrell