From patchwork Fri May 29 13:23:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Robert Foley X-Patchwork-Id: 1300701 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=KFzDwUz0; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 49YQPh1krWz9sSr for ; Fri, 29 May 2020 23:28:40 +1000 (AEST) Received: from localhost ([::1]:37114 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jef3t-0003KG-Rw for incoming@patchwork.ozlabs.org; Fri, 29 May 2020 09:28:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42882) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jeezJ-0004gu-9L for qemu-devel@nongnu.org; Fri, 29 May 2020 09:23:53 -0400 Received: from mail-pj1-x1044.google.com ([2607:f8b0:4864:20::1044]:53970) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jeezI-0003ew-8w for qemu-devel@nongnu.org; Fri, 29 May 2020 09:23:52 -0400 Received: by mail-pj1-x1044.google.com with SMTP id ci21so1341149pjb.3 for ; Fri, 29 May 2020 06:23:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=mGW6wnv9FlzkC02Bo8Bk1So4QHTwo22NecRxOgB5aoI=; b=KFzDwUz0qmHA3ULFQs62is1dlym1KjMxCz7QHytByajg9YXKw3fNmWRKR6EH5Ky7kW 4JKfsNQ+ZVDM+BPyKe7zVh+MCSCgo/kzRcpzZgYmCeNixvvg+z+QpcmNeexDJAjxYULY y9DM8HqjwGPBlFGuJ0P7XqnSMvOREJUY5ddJxT/RpvRPcJNk/OhE30txVCMqbKbbAV3s d8GEUR4Su+uTZShn1O+6YoVdCIR/gwKTFUiLIR8gtCEGLgpVV+gWu45yuJs0Bg+Zj9IR HWASs/NVP5KVvdIzORPltuHjD9niHxbA+P/pGcPXKDaf3pORipzIuG3DsntNHII0lWuN pJsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=mGW6wnv9FlzkC02Bo8Bk1So4QHTwo22NecRxOgB5aoI=; b=sPbtEEIPGoHCjY5Yh/hGCfgi+594oQEaLvg6j+ocsSrG4FMajuXqRTUB8KUtEeW0PT 2VT8/31beiFJkVIiwPSPpriGYpseg06Ru+RPpUskw+aEKv4QQjkt7bzYXk5XC2cIAM7M KBcA3l7pHMvwc4hglLThaDKAZlzsScBU1BPHxuGRQGqMq8noUQkMHaCbX1tEeceAZ5FZ iA4Rwp8yFKPkabs/9r5XtBNZ8t/7rRSrubsr+bVlyee4KYQR4M9762CfI+hNQTo11ENm C1dtqY46rE3GkBVRjv7ZydGBe3eJ3ECNYGUNSSPph4ypx41lJGMhDuDyOnqfoc9ExP4t Gpsg== X-Gm-Message-State: AOAM533GthxIwUMPEx3TldNYp7csWFn/rYUbiQ+eP/hLACHEZigPi9Z/ 1umiaUV3H0+saWizdOdbA+F/HtmRK4cPbw== X-Google-Smtp-Source: ABdhPJy3LBU7U4vWZIml69K09YTeDCX4bKcknVQXRxuLDpwOo1LGjb3BaPOpIw5Cr81VoaOBcSbD5w== X-Received: by 2002:a17:90a:f292:: with SMTP id fs18mr9260316pjb.37.1590758630496; Fri, 29 May 2020 06:23:50 -0700 (PDT) Received: from Rfoley-MA01.hsd1.ma.comcast.net ([2601:199:4480:60c0:75ac:d268:da04:dde4]) by smtp.gmail.com with ESMTPSA id e13sm1998686pfd.10.2020.05.29.06.23.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 May 2020 06:23:49 -0700 (PDT) From: Robert Foley To: qemu-devel@nongnu.org Subject: [PATCH v1 08/12] thread: add tsan annotations to QemuSpin Date: Fri, 29 May 2020 09:23:38 -0400 Message-Id: <20200529132341.755-8-robert.foley@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200529132341.755-1-robert.foley@linaro.org> References: <20200529132341.755-1-robert.foley@linaro.org> Received-SPF: pass client-ip=2607:f8b0:4864:20::1044; envelope-from=robert.foley@linaro.org; helo=mail-pj1-x1044.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.puhov@linaro.org, cota@braap.org, alex.bennee@linaro.org, robert.foley@linaro.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: "Emilio G. Cota" Signed-off-by: Emilio G. Cota Signed-off-by: Robert Foley Reviewed-by: Alex Bennée --- include/qemu/thread.h | 39 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 36 insertions(+), 3 deletions(-) diff --git a/include/qemu/thread.h b/include/qemu/thread.h index e50a073889..43fc094b96 100644 --- a/include/qemu/thread.h +++ b/include/qemu/thread.h @@ -206,6 +206,10 @@ void qemu_thread_atexit_add(struct Notifier *notifier); */ void qemu_thread_atexit_remove(struct Notifier *notifier); +#ifdef CONFIG_TSAN +#include +#endif + struct QemuSpin { int value; }; @@ -213,23 +217,46 @@ struct QemuSpin { static inline void qemu_spin_init(QemuSpin *spin) { __sync_lock_release(&spin->value); +#ifdef CONFIG_TSAN + __tsan_mutex_create(spin, __tsan_mutex_not_static); +#endif } -static inline void qemu_spin_destroy(QemuSpin *spin) -{ } +/* const parameter because the only purpose here is the TSAN annotation */ +static inline void qemu_spin_destroy(const QemuSpin *spin) +{ +#ifdef CONFIG_TSAN + __tsan_mutex_destroy((void *)spin, __tsan_mutex_not_static); +#endif +} static inline void qemu_spin_lock(QemuSpin *spin) { +#ifdef CONFIG_TSAN + __tsan_mutex_pre_lock(spin, 0); +#endif while (unlikely(__sync_lock_test_and_set(&spin->value, true))) { while (atomic_read(&spin->value)) { cpu_relax(); } } +#ifdef CONFIG_TSAN + __tsan_mutex_post_lock(spin, 0, 0); +#endif } static inline bool qemu_spin_trylock(QemuSpin *spin) { - return __sync_lock_test_and_set(&spin->value, true); +#ifdef CONFIG_TSAN + __tsan_mutex_pre_lock(spin, __tsan_mutex_try_lock); +#endif + bool busy = __sync_lock_test_and_set(&spin->value, true); +#ifdef CONFIG_TSAN + unsigned flags = __tsan_mutex_try_lock; + flags |= busy ? __tsan_mutex_try_lock_failed : 0; + __tsan_mutex_post_lock(spin, flags, 0); +#endif + return busy; } static inline bool qemu_spin_locked(QemuSpin *spin) @@ -239,7 +266,13 @@ static inline bool qemu_spin_locked(QemuSpin *spin) static inline void qemu_spin_unlock(QemuSpin *spin) { +#ifdef CONFIG_TSAN + __tsan_mutex_pre_unlock(spin, 0); +#endif __sync_lock_release(&spin->value); +#ifdef CONFIG_TSAN + __tsan_mutex_post_unlock(spin, 0); +#endif } struct QemuLockCnt {