linux-kernel - Re: Is gcc thread-unsafe?

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Message-ID: <18222.2107.914484.284023@zebedee.pink>
Date:	Sun, 4 Nov 2007 17:58:19 +0000
From:	Andrew Haley <aph@...hat.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Bart Van Assche <bart.vanassche@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Tomash Brechko <tomash.brechko@...il.com>
Subject: Re: Is gcc thread-unsafe?

Linus Torvalds writes:
 > 
 > 
 > On Sun, 4 Nov 2007, Bart Van Assche wrote:
 > > 
 > > Has it already been decided who will do this audit, and when this
 > > audit will happen ? Has a target date been set when this audit
 > > should be complete, or is the completion of this audit a
 > > requirement for the release of a specific gcc version ?
 > 
 > I am told that the gcc people realized that was indeed a bug
 > (people were able to show problems even in non-threaded
 > environments with mprotect()), and have now fixed it in the current
 > gcc sources. That still leaves the old versions with potential
 > problems, but I think it makes it much less interesting to audit
 > for these things.

We're back-porting the patch to all open branches.  However, this
patch only affects one paticular case where gcc introduces a data
race; we're sure there are others not fixed.

Andrew.

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