From: Thomas Rast <trast@student.ethz.ch>
Date: Tue, 25 Oct 2011 16:07:53 GMT
Subject: Re: general protection faults with "git grep" version 1.7.7.1
Message-ID: <201110251807.53893.trast@student.ethz.ch>
In-Reply-To: <201110251800.28054.trast@student.ethz.ch>

Thomas Rast wrote:
> Jim Meyering wrote:
> > Thomas Rast wrote:
> > > [GCC moves access to a file-static variable across pthread_mutex_lock()]
> > 
> > Thanks for the investigation.
> > Actually, isn't gcc -O2's code-motion justified?
> > While we *know* that those globals may be modified asynchronously,
> > builtin/grep.c forgot to tell gcc about that.
> 
> I'm somewhat unwilling to believe that:
> 
> * "volatile" enforces three unrelated things, see e.g. [1].

Argh, forgot my reference:
[1] http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2016.html
    section "Existing portable uses"

-- 
Thomas Rast
trast@{inf,student}.ethz.ch