From patchwork Tue Jul 21 08:10:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 277679 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=-10.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED autolearn=unavailable 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 20CABC433E4 for ; Tue, 21 Jul 2020 08:12:13 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id DE6192068F for ; 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Tue, 21 Jul 2020 08:11:05 +0000 (UTC) Received: from thuth.com (ovpn-112-102.ams2.redhat.com [10.36.112.102]) by smtp.corp.redhat.com (Postfix) with ESMTP id 84B2E19C66; Tue, 21 Jul 2020 08:11:04 +0000 (UTC) From: Thomas Huth To: peter.maydell@linaro.org, qemu-devel@nongnu.org Subject: [PULL 05/10] docs/fuzz: describe building fuzzers with enable-sanitizers Date: Tue, 21 Jul 2020 10:10:50 +0200 Message-Id: <20200721081055.14073-6-thuth@redhat.com> In-Reply-To: <20200721081055.14073-1-thuth@redhat.com> References: <20200721081055.14073-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.120; envelope-from=thuth@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/21 01:46:39 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no 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: Alexander Bulekov Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Alexander Bulekov Signed-off-by: Alexander Bulekov Message-Id: <20200706195534.14962-3-alxndr@bu.edu> Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Thomas Huth Signed-off-by: Thomas Huth --- docs/devel/fuzzing.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/docs/devel/fuzzing.txt b/docs/devel/fuzzing.txt index db5641de74..12bf6aa0ca 100644 --- a/docs/devel/fuzzing.txt +++ b/docs/devel/fuzzing.txt @@ -23,9 +23,12 @@ AddressSanitizer mmaps ~20TB of memory, as part of its detection. This results in a large page-map, and a much slower fork(). To build the fuzzers, install a recent version of clang: -Configure with (substitute the clang binaries with the version you installed): +Configure with (substitute the clang binaries with the version you installed). +Here, enable-sanitizers, is optional but it allows us to reliably detect bugs +such as out-of-bounds accesses, use-after-frees, double-frees etc. - CC=clang-8 CXX=clang++-8 /path/to/configure --enable-fuzzing + CC=clang-8 CXX=clang++-8 /path/to/configure --enable-fuzzing \ + --enable-sanitizers Fuzz targets are built similarly to system/softmmu: