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conservative stack scanning (was: Re: bug#13408: Emacs pretest 24.2.92 -


From: Stefan Monnier
Subject: conservative stack scanning (was: Re: bug#13408: Emacs pretest 24.2.92 - compilation error on AIX 5.3 using gcc 4.7-2)
Date: Fri, 11 Jan 2013 14:51:27 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)

> No, GCC consistently refused to compile it.  It's just that
> this code is rarely compiled -- it's normally ifdeffed out,
> so GCC doesn't see the problem.  I suppose that on AIX the
> code is not ifdeffed out, so that's why the bug was reported
> for AIX.

Ah, that's where the AIX-dependence comes from!
Shouldn't we just enable conservative stack scanning for
all architectures?  AFAIK, the only systems where we don't use it are
systems where we don't know whether we can use it, rather than systems
where we know we can't use it.


        Stefan



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