From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from outbound-ss-820.bluehost.com (outbound-ss-820.bluehost.com [69.89.24.241]) by sourceware.org (Postfix) with ESMTPS id CE2D73858CDB for ; Wed, 21 Sep 2022 16:09:37 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org CE2D73858CDB Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=tromey.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=tromey.com Received: from cmgw15.mail.unifiedlayer.com (unknown [10.0.90.130]) by progateway2.mail.pro1.eigbox.com (Postfix) with ESMTP id 9174A1004817F for ; Wed, 21 Sep 2022 16:09:25 +0000 (UTC) Received: from box5379.bluehost.com ([162.241.216.53]) by cmsmtp with ESMTP id b2HsokBATaT2Rb2HtoPhVC; Wed, 21 Sep 2022 16:09:25 +0000 X-Authority-Reason: nr=8 X-Authority-Analysis: v=2.4 cv=BO52EHcG c=1 sm=1 tr=0 ts=632b3735 a=ApxJNpeYhEAb1aAlGBBbmA==:117 a=ApxJNpeYhEAb1aAlGBBbmA==:17 a=dLZJa+xiwSxG16/P+YVxDGlgEgI=:19 a=xOM3xZuef0cA:10:nop_rcvd_month_year a=Qbun_eYptAEA:10:endurance_base64_authed_username_1 a=CCpqsmhAAAAA:8 a=75FAf6A6GYzAqeeAwkAA:9 a=66zSKFQpzMcA:10:demote_shortener_domain_2 a=ul9cdbp4aOFLsgKbc677:22 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tromey.com; s=default; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date:References :Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=+vItfs89wuCuTl7REv4HvNQBlzehdr9IiMTFI7zdTTI=; b=Eg4sIlzDuDsBNhmLQ2pmSbgxO4 iLW+Mn3nEo/CFADA0MDy7WTsADmfBGaCLEHRRi+gtBusnSZgNlWbo5kijhMs+a57AOHmctfllvyvM fvjgQO/gXNuNXU9xhGDrTuiqr; Received: from 71-211-160-49.hlrn.qwest.net ([71.211.160.49]:56538 helo=murgatroyd) by box5379.bluehost.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1ob2Hs-000vhj-By; Wed, 21 Sep 2022 10:09:24 -0600 From: Tom Tromey To: Tom de Vries via Gdb-patches Cc: Tom de Vries Subject: Re: [PATCH][gdbsupport] Avoid main thread in parallel for with thread sanitizer References: <20220718100520.GA26230@delia.home> X-Attribution: Tom Date: Wed, 21 Sep 2022 10:09:19 -0600 In-Reply-To: <20220718100520.GA26230@delia.home> (Tom de Vries via Gdb-patches's message of "Mon, 18 Jul 2022 12:05:22 +0200") Message-ID: <87y1uc3e1c.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box5379.bluehost.com X-AntiAbuse: Original Domain - sourceware.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tromey.com X-BWhitelist: no X-Source-IP: 71.211.160.49 X-Source-L: No X-Exim-ID: 1ob2Hs-000vhj-By X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 71-211-160-49.hlrn.qwest.net (murgatroyd) [71.211.160.49]:56538 X-Source-Auth: tom+tromey.com X-Email-Count: 3 X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-Spam-Status: No, score=-3022.5 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, JMQ_SPF_NEUTRAL, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Sep 2022 16:09:39 -0000 >>>>> "Tom" == Tom de Vries via Gdb-patches writes: Tom> When running tasks in a parallel for, some elements may be handled by a worker Tom> thread and others by the main thread. Tom> When running with -fsanitize=thread, avoid the main thread in the parallel Tom> for, to prevent multi-threading problems being hidden. Tom> Tested on x86_64-linux, with -fsanitize=thread. Tom> Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29359 Tom> Any comments? I tend to think that different behavior based on the use of a sanitizer should be avoided. Otherwise, the sanitizer is not checking what is actually run. Tom