From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17912 invoked by alias); 12 Dec 2010 20:51:59 -0000 Received: (qmail 17904 invoked by uid 22791); 12 Dec 2010 20:51:58 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sun, 12 Dec 2010 20:51:53 +0000 From: "paolo.carlini at oracle dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/46914] std::atomic::exchange(...) doesn't store correct value. X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: paolo.carlini at oracle dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Sun, 12 Dec 2010 20:51:00 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2010-12/txt/msg01321.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46914 --- Comment #2 from Paolo Carlini 2010-12-12 20:51:40 UTC --- I cannot reproduce this on anything from current 4.4 branch to mainline (with ). I get: a = 0x603010 *a = 10 ptr = 0x603010 *ptr 10 b = 0x603030 *b = 11 x.exchange(b) = 0x603010 ptr = 0x603030 *ptr 11 c = 0x603050 *c = 12 x.exchange(c) = 0x603030 ptr = 0x603050 *ptr 12