Re: Heap corruption?

[Miles Bader]

address@hidden (Gerd Moellmann) writes:
> > (I've wondered if there are some systems that locate the heap in an
> > area with a high bit set; can emacs simply not run there?).
> 
> There's is DATA_SEG_BITS in lisp.h, but I don't know which
> contemporary systems use it, if any; it was used on rt-pc according to
> a comment there.  DATA_SEG_BITS can be used to specify some constant
> high bits to add when unboxing a pointer to a Lisp object.

Hmm, I suppose that'd help you work around such systems.  Still,
low-bit tags seem safer and nicer all-round.

-Miles
-- 
.Numeric stability is probably not all that important when you're guessing.