From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dedi548.your-server.de (dedi548.your-server.de [85.10.215.148]) by sourceware.org (Postfix) with ESMTPS id 4700C3858D37 for ; Fri, 22 Apr 2022 05:37:58 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 4700C3858D37 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=embedded-brains.de Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=embedded-brains.de Received: from sslproxy02.your-server.de ([78.47.166.47]) by dedi548.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1nhlzQ-000HTb-1V; Fri, 22 Apr 2022 07:37:56 +0200 Received: from [82.100.198.138] (helo=mail.embedded-brains.de) by sslproxy02.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nhlzP-000Uo6-VE; Fri, 22 Apr 2022 07:37:55 +0200 Received: from localhost (localhost [127.0.0.1]) by mail.embedded-brains.de (Postfix) with ESMTP id A724C4800CB; Fri, 22 Apr 2022 07:37:55 +0200 (CEST) Received: from mail.embedded-brains.de ([127.0.0.1]) by localhost (zimbra.eb.localhost [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id e1OJx9540zce; Fri, 22 Apr 2022 07:37:55 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by mail.embedded-brains.de (Postfix) with ESMTP id 5875B48017F; Fri, 22 Apr 2022 07:37:55 +0200 (CEST) X-Virus-Scanned: amavisd-new at zimbra.eb.localhost Received: from mail.embedded-brains.de ([127.0.0.1]) by localhost (zimbra.eb.localhost [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id hlB_emxrPTUi; Fri, 22 Apr 2022 07:37:55 +0200 (CEST) Received: from [10.10.171.14] (unknown [10.10.171.14]) by mail.embedded-brains.de (Postfix) with ESMTPSA id 29BC54800CB; Fri, 22 Apr 2022 07:37:55 +0200 (CEST) Message-ID: <14a74c2a-6131-294c-01b5-513bd76f4f52@embedded-brains.de> Date: Fri, 22 Apr 2022 07:37:54 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.0 Subject: Re: [PATCH] Add condition coverage profiling Content-Language: en-US To: =?UTF-8?Q?J=c3=b8rgen_Kvalsvik?= , gcc-patches@gcc.gnu.org References: <1ee43d5d-9c6c-f55b-e5b1-c82a6ff5f653@embedded-brains.de> <135f1f97-9359-f3fa-7718-4384aa9a376f@woven-planet.global> <119d52c0-713a-b55b-8745-53a2307dfd9f@embedded-brains.de> <67e557c7-f03e-9c0b-faf1-fefbecddcac6@woven-planet.global> From: Sebastian Huber In-Reply-To: <67e557c7-f03e-9c0b-faf1-fefbecddcac6@woven-planet.global> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Authenticated-Sender: smtp-embedded@poldinet.de X-Virus-Scanned: Clear (ClamAV 0.103.5/26519/Thu Apr 21 10:23:36 2022) X-Spam-Status: No, score=-5.0 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, NICE_REPLY_A, SCC_5_SHORT_WORD_LINES, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Apr 2022 05:37:59 -0000 On 17/04/2022 13:27, J=C3=B8rgen Kvalsvik wrote: >> In theory, would it be possible to print the state of the truth table = with the >> information available in the gcda and gcno files? For example: >> >> Truth table for: a && (b || c)) && d >> >> 0 | 1 | 2 | 3 || covered >> --+---+---+---++-------- >> 0 | X | X | X || Y >> 0 | X | X | X || Y >> 0 | X | X | X || Y >> 0 | X | X | X || Y >> 0 | X | X | X || Y >> 0 | X | X | X || Y >> 0 | X | X | X || Y >> 0 | X | X | X || Y >> 1 | 0 | 0 | X || N >> 1 | 0 | 0 | X || N >> 1 | 0 | 1 | 0 || N >> 1 | 0 | 1 | 1 || N >> 1 | 1 | X | 0 || Y >> 1 | 1 | X | 0 || Y >> 1 | 1 | X | 1 || Y >> 1 | 1 | X | 1 || Y > Maybe? We would at least need to store the masking tables too, which ri= ght now > are implicitly stored as in the instrumentation. It's not too bad, but = it > probably means the two functions should return some richer structure, w= hich in > turn means a little bit of redesign. Computing the truth table itself s= houldn't > be difficult. Using the tool in the context of safety-critical application would=20 normally require also a tool qualification. For GCC, this is a bit=20 unrealistic. It would help if the tool output can be verified. Being=20 able to inspect the masking tables could help a reviewer to check what=20 the tool did for a sample set of inputs. --=20 embedded brains GmbH Herr Sebastian HUBER Dornierstr. 4 82178 Puchheim Germany email: sebastian.huber@embedded-brains.de phone: +49-89-18 94 741 - 16 fax: +49-89-18 94 741 - 08 Registergericht: Amtsgericht M=C3=BCnchen Registernummer: HRB 157899 Vertretungsberechtigte Gesch=C3=A4ftsf=C3=BChrer: Peter Rasmussen, Thomas= D=C3=B6rfler Unsere Datenschutzerkl=C3=A4rung finden Sie hier: https://embedded-brains.de/datenschutzerklaerung/