From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 2D3ECA052E; Mon, 3 Feb 2020 15:46:52 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 79EA11BFAF; Mon, 3 Feb 2020 15:46:51 +0100 (CET) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id 7DF8B1BFAD for ; Mon, 3 Feb 2020 15:46:50 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Feb 2020 06:46:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,398,1574150400"; d="scan'208";a="248885789" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.61]) ([10.237.221.61]) by orsmga002.jf.intel.com with ESMTP; 03 Feb 2020 06:46:41 -0800 To: Dodji Seketeli Cc: Neil Horman , "Ananyev, Konstantin" , Thomas Monjalon , Akhil Goyal , "Trahe, Fiona" , David Marchand , Anoob Joseph , "Kusztal, ArkadiuszX" , "dev@dpdk.org" , "Richardson, Bruce" , "Mcnamara, John" , Andrew Rybchenko , "aconole@redhat.com" References: <20191220152058.10739-1-david.marchand@redhat.com> <6121442.K2JlShyGXD@xps> <1779027.taCxCBeP46@xps> <666f2cc7-0906-7a07-a582-87800f321a00@intel.com> <20200203115034.GA25978@hmswarspite.think-freely.org> <0054d684-2637-f7b9-f256-6cb80f4a19c3@intel.com> <86ftfr3h4f.fsf@seketeli.org> From: Ferruh Yigit Autocrypt: addr=ferruh.yigit@intel.com; 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charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [PATCH v2 4/4] add ABI checks X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 2/3/2020 2:00 PM, Dodji Seketeli wrote: > Hello, > > Ferruh Yigit a écrit: > > [...] > >> +1 the change/shuffle of the existing values are problematic, but we don't have >> it in this case. > > Right. > > [...] > >> The concern is when there are cases we can waive, we can't directly rely on the >> tool and automate it. These indicators good for improving the code, but not good >> to use it as build time checker. > > Well, it depends. The tooling as it is today have the capability to > automatically "waive" some classes of A{B,P}I change reports that you > guys (the developers) deem harmless, in the context of your project. > > For instance, in the precise case of interest here, one could define a > "suppression specification" to teach the ABI verifier that, for the enum > rte_crypto_asym_xform_type, the only enumerator which numerical value is > allowed to change is the one named RTE_CRYPTO_ASYM_XFORM_TYPE_LIST_END. > > The content of the suppression specification file would look like: > > [suppress_type] > # So, in practise, this rule is to allow adding enumerators > # only to the of the the rte_crypto_asym_xform_type enum, > # right before the RTE_CRYPTO_ASYM_XFORM_TYPE_LIST_END > # enumerator which is meant to always be the last enumerator. > type_kind = enum > name = rte_crypto_asym_xform_type > changed_enumerators = RTE_CRYPTO_ASYM_XFORM_TYPE_LIST_END > > This way, you can hopefully reduce the surface of the changes you want > to see reported, tailored in a way that is specific to your project. > This should hopefully bring the system closer to a state that would > allow you guys to having something that is automated enough to have it > be triggered at build time. Thanks, at least this provides a way to silence the warnings not an issue for us as we hit them. Is there a more global, don't warn on new enums kind of option? Although I assume this is not possible since _END or _MAX enum value will be changing and tool can't know its usage and will report the change. > > And if there is some sensibly needed tweaking that the libabigail > tooling doesn't allow you guys to do right away, I'd be happy to hear > about it and try to add the functionality to the framework for you guys. > >> Is there any way to reduce the failure only to definite ABI breakages? > > I hope my comment above somewhat answers this question of yours. If it > does not, please tell me. > > Cheers, >