From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12439 invoked by alias); 4 Jan 2015 17:42:34 -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 Received: (qmail 12392 invoked by uid 48); 4 Jan 2015 17:42:27 -0000 From: "ebotcazou at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug ada/60078] acats c761007 fails on ARM Date: Sun, 04 Jan 2015 17:42:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: ada X-Bugzilla-Version: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: ebotcazou at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2015-01/txt/msg00174.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60078 --- Comment #15 from Eric Botcazou --- > that happened only once. and the problem did never ever repeat. > But my gut feeling is still that there is a race conditition. Yes, I agree that the usage of Side_Effect_Finger looks suspicious here. > However I have been recently working on TSAN a bit, and I have an > experimental tsan version that I played with. Initially > it ICE'd on Ada's VIEW_CONVERT_EXPRs, but when I fixed that I got: "data races" (unprotected concurrent accesses) are allowed in Ada if the object is declared as atomic, in which case GNAT generates synchronization directives.