From owner-svn-src-all@freebsd.org Sat Dec 21 02:43:21 2019 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 799CF1EC565; Sat, 21 Dec 2019 02:43:21 +0000 (UTC) (envelope-from rlibby@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 47fqfx2fYCz3Fx7; Sat, 21 Dec 2019 02:43:21 +0000 (UTC) (envelope-from rlibby@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 564498A4B; Sat, 21 Dec 2019 02:43:21 +0000 (UTC) (envelope-from rlibby@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id xBL2hLcH088205; Sat, 21 Dec 2019 02:43:21 GMT (envelope-from rlibby@FreeBSD.org) Received: (from rlibby@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id xBL2hLnv088204; Sat, 21 Dec 2019 02:43:21 GMT (envelope-from rlibby@FreeBSD.org) Message-Id: <201912210243.xBL2hLnv088204@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: rlibby set sender to rlibby@FreeBSD.org using -f From: Ryan Libby Date: Sat, 21 Dec 2019 02:43:21 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r355969 - head/sys/sys X-SVN-Group: head X-SVN-Commit-Author: rlibby X-SVN-Commit-Paths: head/sys/sys X-SVN-Commit-Revision: 355969 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 21 Dec 2019 02:43:21 -0000 Author: rlibby Date: Sat Dec 21 02:43:20 2019 New Revision: 355969 URL: https://svnweb.freebsd.org/changeset/base/355969 Log: gcc: quiet Wattribute for no_sanitize("address") This is an unfortunate instance where the __has_attribute check does not function usefully. Gcc does have the attribute, but for gcc it only applies to functions, not variables, and trying to apply it to a variable generates Wattribute. So far we only apply the attribute to variables. Only enable the attribute for clang, for now. Reviewed by: Anton Rang Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D22875 Modified: head/sys/sys/cdefs.h Modified: head/sys/sys/cdefs.h ============================================================================== --- head/sys/sys/cdefs.h Sat Dec 21 02:40:40 2019 (r355968) +++ head/sys/sys/cdefs.h Sat Dec 21 02:43:20 2019 (r355969) @@ -873,8 +873,12 @@ /* Function should not be analyzed. */ #define __no_lock_analysis __lock_annotate(no_thread_safety_analysis) -/* Function or variable should not be sanitized, ie. by AddressSanitizer */ -#if __has_attribute(no_sanitize) +/* + * Function or variable should not be sanitized, i.e. by AddressSanitizer. + * GCC has the nosanitize attribute, but as a function attribute only, and + * warns on use as a variable attribute. + */ +#if __has_attribute(no_sanitize) && defined(__clang__) #define __nosanitizeaddress __attribute__((no_sanitize("address"))) #else #define __nosanitizeaddress