RFC: getting rid of Xalloc/Xfree/... in server

[Adam Jackson]

On Mon, 2010-05-10 at 07:17 -0700, Alan Coopersmith wrote:
> Tiago Vignatti wrote:
> > On 05/08/2010 01:23 PM, Matthieu Herrb wrote:
> >> If someone wants to be able to experiment with different malloc
> >> implementations in X, then we should keep wrappers to make it easier.
> > 
> > then ld's our friend and let us do this in a cleaner way:
> > 
> > http://people.freedesktop.org/~vignatti/scrutinizing-x-mem/0001-dix-add-memory-allocation-wrapping-functions-for-pro.patch
> 
> Note the existing checks for ld wrap support in configure.ac, since it's
> only available on GNU ld and very very recent versions of OpenSolaris ld.
> It should be okay to use if configure finds it, you just can't assume that
> it will be found everywhere.
> 
> ELF interposition is more widely available, but still not universal to all
> our platforms.

LD_PRELOAD works on every ELF system we're portable to, though for Xorg
you need to be root to do it.

- ajax
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