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Tue, 21 Jul 2020 04:11:12 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-339-rYbpRK0wOmubSoz-PevEDw-1; Tue, 21 Jul 2020 04:11:06 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A991F801A03; 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) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1595319069; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZPtrztw9XpCfhwIOLgP9AbPXxCIFdvLDY4Et5nO8O1c=; b=jGkvwhOYapMnNMo5eC2zkaC/sniaO+PVjRYkGzUlyiexPeKw5FKX7kd0IT5OmCBLgPPMMj iTmk72D1UaU+QyqYrIIPSM0U7VTRy5WPr6mA/AC1vLgR2ublG+FyN/V+IT/687naWhbqWi RCI4u95/LfBYErGlYnC8EfA5YEQHp34= X-MC-Unique: rYbpRK0wOmubSoz-PevEDw-1 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 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) From: Alexander Bulekov Signed-off-by: Alexander Bulekov Message-Id: <20200706195534.14962-3-alxndr@bu.edu> Reviewed-by: Philippe Mathieu-Daud=C3=A9 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 d= etection. This results in a large page-map, and a much slower fork(). =20 To build the fuzzers, install a recent version of clang: -Configure with (substitute the clang binaries with the version you install= ed): +Configure with (substitute the clang binaries with the version you install= ed). +Here, enable-sanitizers, is optional but it allows us to reliably detect b= ugs +such as out-of-bounds accesses, use-after-frees, double-frees etc. =20 - CC=3Dclang-8 CXX=3Dclang++-8 /path/to/configure --enable-fuzzing + CC=3Dclang-8 CXX=3Dclang++-8 /path/to/configure --enable-fuzzing \ + --enable-sanitizers =20 Fuzz targets are built similarly to system/softmmu: =20 --=20 2.18.1