From patchwork Sun Mar 8 17:21:14 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Samuel Thibault X-Patchwork-Id: 131278 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from vm01.sourceware.org (localhost [127.0.0.1]) by sourceware.org (Postfix) with ESMTP id 4D2B24BA2E3D for ; Sun, 8 Mar 2026 17:21:45 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4D2B24BA2E3D X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from sonata.ens-lyon.org (sonata.ens-lyon.org [140.77.166.138]) by sourceware.org (Postfix) with ESMTPS id 737E94BA23D1 for ; Sun, 8 Mar 2026 17:21:16 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 737E94BA23D1 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=ens-lyon.org Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=bounce.ens-lyon.org ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 737E94BA23D1 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=140.77.166.138 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1772990476; cv=none; b=JVyNT3hIGWrwmVXGlejaWn0vFGPKd67oKGWUbNlNbPz0rG3vf+bCGXh5wdIr7yIS5yoKou+YPknNBLL8mHGlkiJXkUcskDpy1vb+TgfTKmyNcSPupSkPyvO5TG8u0Hf32gSBXAImv7wk17vE67UfW52wJBjzOENmYKLdUO5Uk84= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1772990476; c=relaxed/simple; bh=m9H9UpLsvfVeUcjdhITgP/L/SE94mK5CpvHF01ECBs0=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=Pqn0i1ZvtK/7yCuDp9YnApMoZwNRBq174Vwb04WIzznLSTcwKmaA9snpmUutzTTjf3Bd8TrgJkCqZIvVtEs3Jkuq5xlMRfR4jgmX1Z1SqCLneM+ZFoLY4JXdMFFOHwnHq5RYxEWBtZ9+h3SGEYUpie2bed95acMqE2p/PrdBFHs= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 737E94BA23D1 Received: from localhost (localhost [127.0.0.1]) by sonata.ens-lyon.org (Postfix) with ESMTP id 56D43A0267; Sun, 8 Mar 2026 18:21:15 +0100 (CET) Received: from sonata.ens-lyon.org ([127.0.0.1]) by localhost (sonata.ens-lyon.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9rAq7S4RUARl; Sun, 8 Mar 2026 18:21:15 +0100 (CET) Received: from end (aamiens-653-1-40-48.w83-192.abo.wanadoo.fr [83.192.199.48]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by sonata.ens-lyon.org (Postfix) with ESMTPSA id 3B55CA024D; Sun, 8 Mar 2026 18:21:15 +0100 (CET) Received: from samy by end with local (Exim 4.99.1) (envelope-from ) id 1vzHoY-0000000GNXl-2v9v; Sun, 08 Mar 2026 18:21:14 +0100 From: Samuel Thibault To: libc-alpha@sourceware.org Cc: Samuel Thibault , commit-hurd@gnu.org, Brent Baccala Subject: [hurd, commited] htl: Make sure the exit path of last thread sees all thread cleanups Date: Sun, 8 Mar 2026 18:21:14 +0100 Message-ID: <20260308172114.3903742-1-samuel.thibault@ens-lyon.org> X-Mailer: git-send-email 2.51.0 MIME-Version: 1.0 X-Spam-Status: No, score=-12.1 required=5.0 tests=BAYES_00, GIT_PATCH_0, JMQ_SPF_NEUTRAL, KAM_DMARC_STATUS, RCVD_IN_DNSWL_BLOCKED, RCVD_IN_VALIDITY_RPBL_BLOCKED, RCVD_IN_VALIDITY_SAFE_BLOCKED, SPF_HELO_PASS, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libc-alpha-bounces~patchwork=sourceware.org@sourceware.org In case e.g. some atexit() handlers expect all threads to have finished their side effects. Reported-by: Brent Baccala 's Claude assistant --- htl/pt-exit.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/htl/pt-exit.c b/htl/pt-exit.c index e08b3252cf..117ea99b7d 100644 --- a/htl/pt-exit.c +++ b/htl/pt-exit.c @@ -60,7 +60,7 @@ __pthread_exit (void *status) /* Decrease the number of threads. We use an atomic operation to make sure that only the last thread calls `exit'. */ - if (atomic_fetch_add_relaxed (&__pthread_total, -1) == 1) + if (atomic_fetch_add_acq_rel (&__pthread_total, -1) == 1) /* We are the last thread. */ exit (0);