From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ACAC2C433E0 for ; Fri, 19 Feb 2021 09:25:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4394964E43 for ; Fri, 19 Feb 2021 09:25:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229800AbhBSJZd (ORCPT ); Fri, 19 Feb 2021 04:25:33 -0500 Received: from mail-lj1-f176.google.com ([209.85.208.176]:34610 "EHLO mail-lj1-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229527AbhBSJZ2 (ORCPT ); Fri, 19 Feb 2021 04:25:28 -0500 Received: by mail-lj1-f176.google.com with SMTP id r23so16735675ljh.1 for ; Fri, 19 Feb 2021 01:25:12 -0800 (PST) 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:mime-version:content-transfer-encoding; bh=7+1XXFxtp0NTyFOGv6KWqg5UlcFRsTicQF0RpwlPL7Q=; b=bqAReWQi2wI37yqPkCrtF3x+u6uGay/HRllodhOnp/ez84abIlN64gx04Rcb2ZnBU4 9GHWJqWvOzhR2MIl+BqAFris53jyqcgYCicZow4ipiqgMj07e4Oj9y8yXUmz+PR+gMsC mWHsgnLaquXyKRjc6hpq6bQIzYJHOmm7FZHGULrgM0+mhlexxYvWT8kznWbWapmdAGa0 lboEFh6ZUGuWSVhz7lt/qB+0BopHzuxXl9c8wonUsbhYIOI7M5eWVBtes4Ex8PvQMN8P ZAoedJRmEaA+UUjJNSx0MSpCB8Mnt1pVT+ZL7pVipbrmJAjirHQrLBztNOjD3TaE+Ay7 r4Zw== X-Gm-Message-State: AOAM532SzBZiVSgxDX68QSDchvtB1DhGZDJ6jCNWhCF/iTBkZElWEEq5 /JV3YQSvQ8G3jTQxkwCLTiUpbdMptylXtg== X-Google-Smtp-Source: ABdhPJy1UPI6F6L2u+sjkmiZ9cEBWFrfgN8EzY9HIRoikI0eGFQFvwW2jgOdsDrq84Z/XyGJMHrw6A== X-Received: by 2002:ac2:4a72:: with SMTP id q18mr5212436lfp.335.1613726686615; Fri, 19 Feb 2021 01:24:46 -0800 (PST) Received: from localhost.localdomain (broadband-188-32-236-56.ip.moscow.rt.ru. [188.32.236.56]) by smtp.googlemail.com with ESMTPSA id 21sm868769lfo.238.2021.02.19.01.24.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Feb 2021 01:24:46 -0800 (PST) From: Denis Efremov To: Julia Lawall Cc: Denis Efremov , cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org Subject: [PATCH v2] coccinelle: misc: add swap script Date: Fri, 19 Feb 2021 12:24:48 +0300 Message-Id: <20210219092448.13760-1-efremov@linux.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210216080133.455456-1-efremov@linux.com> References: <20210216080133.455456-1-efremov@linux.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Check for opencoded swap() implementation. Signed-off-by: Denis Efremov --- Changes in v2: - additional patch rule to drop excessive {} - fix indentation in patch mode by anchoring ; scripts/coccinelle/misc/swap.cocci | 101 +++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 scripts/coccinelle/misc/swap.cocci diff --git a/scripts/coccinelle/misc/swap.cocci b/scripts/coccinelle/misc/swap.cocci new file mode 100644 index 000000000000..d5da9888c222 --- /dev/null +++ b/scripts/coccinelle/misc/swap.cocci @@ -0,0 +1,101 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Check for opencoded swap() implementation. +/// +// Confidence: High +// Copyright: (C) 2021 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// +// Keywords: swap +// + +virtual patch +virtual org +virtual report +virtual context + +@r depends on !patch@ +identifier tmp; +expression a, b; +type T; +position p; +@@ + +( +* T tmp; +| +* T tmp = 0; +| +* T *tmp = NULL; +) +... when != tmp +* tmp = a; +* a = b;@p +* b = tmp; +... when != tmp + +@rpvar depends on patch@ +identifier tmp; +expression a, b; +type T; +@@ + +( +- T tmp; +| +- T tmp = 0; +| +- T *tmp = NULL; +) +... when != tmp +- tmp = a; +- a = b; +- b = tmp ++ swap(a, b) + ; +... when != tmp + + +@rp depends on patch@ +identifier tmp; +expression a, b; +@@ + +- tmp = a; +- a = b; +- b = tmp ++ swap(a, b) + ; + +@depends on (rpvar || rp)@ +@@ + +( + for (...;...;...) +- { + swap(...); +- } +| + while (...) +- { + swap(...); +- } +| + if (...) +- { + swap(...); +- } +) + + +@script:python depends on report@ +p << r.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for swap()") + +@script:python depends on org@ +p << r.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for swap()") -- 2.26.2