From owner-freebsd-hackers@FreeBSD.ORG  Tue Feb 10 02:48:42 2004
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id BB8BD16A4CE
	for <hackers@freebsd.org>; Tue, 10 Feb 2004 02:48:42 -0800 (PST)
Received: from relay.mortal.ru (unknown [62.16.86.250])
	by mx1.FreeBSD.org (Postfix) with ESMTP id DE1C543D46
	for <hackers@freebsd.org>; Tue, 10 Feb 2004 02:48:41 -0800 (PST)
	(envelope-from zevlg@yandex.ru)
Received: from us.dmz.local (wus000.dmz.local [10.32.1.6])
	by relay.mortal.ru (8.11.6/8.11.6) with ESMTP id i1AAlEJ30681;
	Tue, 10 Feb 2004 13:47:14 +0300
Received: from us.dmz.local (localhost.dmz.local [127.0.0.1])
	by us.dmz.local (8.12.3/8.12.3) with ESMTP id i1AApLwC002495;
	Tue, 10 Feb 2004 13:51:21 +0300 (MSK)
	(envelope-from zevlg@yandex.ru)
Received: (from wtc05@localhost)
	by us.dmz.local (8.12.3/8.12.3/Submit) id i1AApLQ2002494;
	Tue, 10 Feb 2004 13:51:21 +0300 (MSK)
X-Authentication-Warning: us.dmz.local: wtc05 set sender to zevlg@yandex.ru
	using -f
To: Zajcev Evgeny <zevlg@yandex.ru>
References: <xzpad3r5mj4.fsf@dwp.des.no> <82fzdjb49t.fsf@us.dmz.local>
From: Zajcev Evgeny <zevlg@yandex.ru>
Date: Tue, 10 Feb 2004 13:51:21 +0300
In-Reply-To: <82fzdjb49t.fsf@us.dmz.local> (Zajcev Evgeny's message of "Tue,
 10 Feb 2004 13:46:54 +0300")
Message-ID: <821xp3b42e.fsf@us.dmz.local>
User-Agent: Gnus/5.1002 (Gnus v5.10.2) XEmacs/21.5 (cabbage, berkeley-unix)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
cc: Dag-Erling Smørgrav <des@des.no>
cc: hackers@freebsd.org
Subject: Re: how to fool gcc?
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 10 Feb 2004 10:48:42 -0000

Zajcev Evgeny <zevlg@yandex.ru> writes:

>
> Maybe just have copy of `s' inside while statement?  Something like:
>
>> #define RETURNS(s) do { \
>>         if ((s) == NULL) \
>>                 openpam_log(PAM_LOG_DEBUG, "returning NULL"); \
>>         else \
>>                 openpam_log(PAM_LOG_DEBUG, "returning '%s'", (s)); \
>>         return (s); \
>> } while (0)

err, I mean

#define RETURNS(s) do { \
        char *scpy = s; \
        if ((s) == NULL) \
                openpam_log(PAM_LOG_DEBUG, "returning NULL"); \
         else \
                 openpam_log(PAM_LOG_DEBUG, "returning '%s'", (scpy)); \
         return (s); \
} while (0)

-- 
lg