Should glibc be fully reentrant? What do we allow interposed symbols to do?

[Carlos O'Donell]

On 10/24/2014 05:31 AM, Torvald Riegel wrote:
>> Allow interposed functions to call back into the runtime, and fix any
>> places where this breaks.
> 
> As worded, I do not agree.  IMHO, this should be opt-in.  It may very
> well be that we'd want an opt-in for large sets of functionality, but
> I'd be concerned about promising support for this *in general*.

I concede. You make a good point.

How do we opt-in? Add a new safety annotation? Re-entrant?

Cheers,
Carlos.