From: Mauricio Fernandez <mfp@...>
Date: 2006-07-21T01:14:12+09:00
Subject: Re: [ANN] sandbox 0.0.11 -- taking the i out of eval

On Fri, Jul 21, 2006 at 12:51:12AM +0900, Joshua Haberman wrote:
> On Fri, Jul 21, 2006 at 12:30:14AM +0900, why the lucky stiff wrote:
> > To be stable, I might need to enhance Thread.  For now is there a way to
> > prevent thread calls?  To prevent crashes, I might need to pause threads
> > until the Sandbox is complete.  Then I will give Sandbox.timeout which
> > gives a maximum execution time.
> 
> I don't want to diss your work, since it is obviously a significant
> accomplishment.  But aren't these problems symptoms of the fact that the
> approach (swapping out global variables) is sort of a hack?  Wouldn't
> all these problems disappear if you did this the "right" way, by making
> these globals into members of a structure that get passed to every
> function (eg. make the parser re-entrant)?

This is exactly what was done in Sydney.  I know know of any plan to bring
that to HEAD though (and there's no way it could get in ruby_1_8). 

YARV is doing (or will do, haven't checked for a while) native threads, but I
don't know if it's reentrant or just using a global interpreter lock like
Python.

-- 
Mauricio Fernandez  -   http://eigenclass.org   -  singular Ruby