From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on yquem.inria.fr X-Spam-Level: X-Spam-Status: No, score=0.8 required=5.0 tests=AWL,SPF_FAIL autolearn=disabled version=3.1.3 X-Original-To: caml-list@yquem.inria.fr Delivered-To: caml-list@yquem.inria.fr Received: from mail4-relais-sop.national.inria.fr (mail4-relais-sop.national.inria.fr [192.134.164.105]) by yquem.inria.fr (Postfix) with ESMTP id 69E8EBBC4 for ; Thu, 5 Mar 2009 10:06:22 +0100 (CET) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AiUIAMckr0lQRFuwX2dsb2JhbACUdxcLCgQUwmiECAY X-IronPort-AV: E=Sophos;i="4.38,305,1233529200"; d="scan'208";a="36122275" Received: from furbychan.cocan.org ([80.68.91.176]) by mail4-smtp-sop.national.inria.fr with ESMTP; 05 Mar 2009 10:06:22 +0100 Received: from rich by furbychan.cocan.org with local (Exim 4.63) (envelope-from ) id 1Lf9X3-0006fj-IT; Thu, 05 Mar 2009 09:06:21 +0000 Date: Thu, 5 Mar 2009 09:06:21 +0000 To: yoann padioleau Cc: Jon Harrop , caml-list@yquem.inria.fr Subject: Re: [Caml-list] stl? Message-ID: <20090305090621.GB24055@annexia.org> References: <91a2ba3e0903031340wcdc976cp52522eb35f7ccb73@mail.gmail.com> <200903050131.03494.jon@ffconsultancy.com> <49AF35B8.9030104@naughtydog.com> <200903050326.57931.jon@ffconsultancy.com> <5001040.203359.1236234148184.JavaMail.www@wwinf2209> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5001040.203359.1236234148184.JavaMail.www@wwinf2209> User-Agent: Mutt/1.5.13 (2006-08-11) From: Richard Jones X-Spam: no; 0.00; stl:01 0100,:01 struct:01 bitfields:01 marshalling:01 hacked:01 2009:98 wrote:01 preprocessor:01 caml-list:01 match:02 guess:04 thu:05 wider:05 indeed:07 On Thu, Mar 05, 2009 at 07:22:28AM +0100, yoann padioleau wrote: > Qemu is written in C, because I guess indeed C struct and union > and bitfields makes it easy to match directly to the hardware (no marshalling, > there is direct mapping). I was hacking on qemu last week, and wishing it wasn't written in C. There's not much of a technical reason why it couldn't have been written in a higher level language. Bitfield manipulation would be more painful unless there was a bitstring-like preprocessor added. The real reason to use C was to get wider development support. Qemu also happens to be security critical (all those hacked up C device emulations offer exploit possibilities for the guests). And it has frequent vulnerabilities. Go figure ... Rich. -- Richard Jones Red Hat