From patchwork Mon Jun 17 08:57:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicola Vetrini X-Patchwork-Id: 13700331 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 581FEC27C6E for ; Mon, 17 Jun 2024 08:57:41 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.741919.1148610 (Exim 4.92) (envelope-from ) id 1sJ8B9-0005ef-1f; Mon, 17 Jun 2024 08:57:31 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 741919.1148610; Mon, 17 Jun 2024 08:57:31 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1sJ8B8-0005df-SM; Mon, 17 Jun 2024 08:57:30 +0000 Received: by outflank-mailman (input) for mailman id 741919; Mon, 17 Jun 2024 08:57:29 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1sJ8B7-0005Fp-5t for xen-devel@lists.xenproject.org; Mon, 17 Jun 2024 08:57:29 +0000 Received: from support.bugseng.com (mail.bugseng.com [162.55.131.47]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 9e641d19-2c87-11ef-90a3-e314d9c70b13; Mon, 17 Jun 2024 10:57:26 +0200 (CEST) Received: from nico.bugseng.com (unknown [46.228.253.194]) by support.bugseng.com (Postfix) with ESMTPSA id 833654EE075B; Mon, 17 Jun 2024 10:57:25 +0200 (CEST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 9e641d19-2c87-11ef-90a3-e314d9c70b13 From: Nicola Vetrini To: xen-devel@lists.xenproject.org Cc: sstabellini@kernel.org, michal.orzel@amd.com, xenia.ragiadakou@amd.com, ayan.kumar.halder@amd.com, consulting@bugseng.com, Nicola Vetrini , Andrew Cooper , George Dunlap , Jan Beulich , Julien Grall Subject: [XEN PATCH v2 2/6][RESEND] xen/self-tests: address violations of MISRA rule 20.7 Date: Mon, 17 Jun 2024 10:57:14 +0200 Message-Id: <2679cc27038689373d2d7e8abd62255bcd1b86f3.1718378539.git.nicola.vetrini@bugseng.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 MISRA C Rule 20.7 states: "Expressions resulting from the expansion of macro parameters shall be enclosed in parentheses". Therefore, some macro definitions should gain additional parentheses to ensure that all current and future users will be safe with respect to expansions that can possibly alter the semantics of the passed-in macro parameter. No functional change. Signed-off-by: Nicola Vetrini Reviewed-by: Jan Beulich --- In this case the use of parentheses can detect misuses of the COMPILE_CHECK macro for the fn argument that happen to pass the compile-time check (see e.g. https://godbolt.org/z/n4zTdz595). An alternative would be to deviate these macros, but since they are used to check the correctness of other code it seemed the better alternative to futher ensure that all usages of the macros are safe. --- xen/include/xen/self-tests.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/xen/include/xen/self-tests.h b/xen/include/xen/self-tests.h index 42a4cc4d17fe..58484fe5a8ae 100644 --- a/xen/include/xen/self-tests.h +++ b/xen/include/xen/self-tests.h @@ -19,11 +19,11 @@ #if !defined(CONFIG_CC_IS_CLANG) || CONFIG_CLANG_VERSION >= 80000 #define COMPILE_CHECK(fn, val, res) \ do { \ - typeof(fn(val)) real = fn(val); \ + typeof((fn)(val)) real = (fn)(val); \ \ if ( !__builtin_constant_p(real) ) \ asm ( ".error \"'" STR(fn(val)) "' not compile-time constant\"" ); \ - else if ( real != res ) \ + else if ( real != (res) ) \ asm ( ".error \"Compile time check '" STR(fn(val) == res) "' failed\"" ); \ } while ( 0 ) #else @@ -37,9 +37,9 @@ */ #define RUNTIME_CHECK(fn, val, res) \ do { \ - typeof(fn(val)) real = fn(HIDE(val)); \ + typeof((fn)(val)) real = (fn)(HIDE(val)); \ \ - if ( real != res ) \ + if ( real != (res) ) \ panic("%s: %s(%s) expected %u, got %u\n", \ __func__, #fn, #val, real, res); \ } while ( 0 )