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Re: Removal of unexec support from glibc malloc

From: Fabrice Popineau
Subject: Re: Removal of unexec support from glibc malloc
Date: Tue, 19 Jan 2016 20:37:38 +0000 (UTC)
User-agent: Loom/3.14 (http://gmane.org/)

Eli Zaretskii <eliz <at> gnu.org> writes:

> > From: Ali Bahrami <ali_gnu2 <at> emvision.com>
> > Date: Mon, 18 Jan 2016 15:45:50 -0700
> > 

> > Unexec is complicated, and it is a problem for alternative non-brk
> > based mallocs, or ASLR. One of the strong design points of emacs is
> > its use of a minimal and simple C core, with the system largely 
> > in lisp. Losing unexec would leave an even simpler core.
> We are not wedded to unexec in any kind, including the Catholic kind.
> It is here because (a) it "just works" and breaks only very rarely,
> and, most importantly, (b) no one has stepped forward with code to
> replace it on a VCS branch where one could checkout the results and
> see how clean the code is how well it works in practice.

A portable dumper would solve the unexec issue.

There was an attempt at porting the XEmacs portable dumper to GNU Emacs 
long ago:

The topic is recurrent:


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