From mboxrd@z Thu Jan 1 00:00:00 1970 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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 08CDAC43387 for ; Tue, 15 Jan 2019 16:13:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D2D1D20657 for ; Tue, 15 Jan 2019 16:13:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731408AbfAOQNV (ORCPT ); Tue, 15 Jan 2019 11:13:21 -0500 Received: from mx1.redhat.com ([209.132.183.28]:51180 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731396AbfAOQNU (ORCPT ); Tue, 15 Jan 2019 11:13:20 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C61E0C0669AD; Tue, 15 Jan 2019 16:13:19 +0000 (UTC) Received: from [10.36.117.133] (ovpn-117-133.ams2.redhat.com [10.36.117.133]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 5EC875D778; Tue, 15 Jan 2019 16:13:17 +0000 (UTC) To: Jiri Olsa , Arnaldo Carvalho de Melo Cc: lkml , Ingo Molnar , Namhyung Kim , Alexander Shishkin , Peter Zijlstra , Michael Petlan , Masami Hiramatsu References: <20190115135354.11572-1-jolsa@kernel.org> From: Nick Clifton Openpgp: preference=signencrypt Autocrypt: addr=nickc@redhat.com; prefer-encrypt=mutual; keydata= mQINBFm/2cUBEADkvRqMWfAryJ52T4J/640Av5cam9ojdFih9MjcX7QWFxIzJfTFYq2z+nb4 omdfZosdCJL2zGcn6C0AxpHNvxR9HMDkEyFHKrjDh4xWU+pH4z9azQEqJh331X7UzbZldqQo 16VkuVavgsTJaHcXm+nGIBTcUbl2oiTtHhmuaYxx6JTMcFjC7vyO5mLBw78wt52HBYweJ0Nj HBvvH/JxbAAULSPRUC61K0exlO49VFbFETQNG1hZTKEji95fPbre7PpXQ0ewQShUgttEE/J3 UA4jYaF9lOcZgUzbA27xTV//KomP0D30yr4e4EJEJYYNKa3hofTEHDXeeNgM25tprhBUMdbV RZpf2Keuk2uDVwc+EiOVri48rb1NU+60sOXvoGO6Ks81+mhAGmrBrlgLhAp8K1HPHI4MG4gH nrMqX2rEGUGRPFjC3qqVVlPm8H05PnosNqDLQ1Pf7C0pVgsCx6hKQB7Y1qBui7aoj9zeFaQg pYef+CEERIKEcWwrjaOJwK3pi9HFdxS0NNWYZj8HPzz/AsgTTQdsbulPlVq2SsctmOnL42CZ OCTppGYwl53CG/EqVY+UQBzFzJBaY8TJRFFYVEy5/HH4H11rMoZwqIkk71EOGU3X6mWlANRi kR3M4GhVITRzuaV69Fed+OeXcCmP94ASLfuhBR2uynmcHpBKpwARAQABtDtOaWNrIENsaWZ0 b24gKENoaWVmIEJpbnV0aWxzIE1haW50YWluZXIpIDxuaWNrY0ByZWRoYXQuY29tPokCOAQT AQIAIgUCWb/ZxQIbAwYLCQgHAwIGFQgCCQoLBBYCAwECHgECF4AACgkQE/zvid2ePE9cOxAA 3cX1bdDaTFttTqukdPXLCtD2aNwJos4vB4LYPSgugLkYaHIQH9d1NQPhS0TlUeovnFNESLaV soihv0YmBUCyL4jE52FRoTjE6fUhYkFNqIWN2HYwkVrSap2UUJFquRVoVbPkbSup8P+D8eyd BbdxsY6f+5E8Rtz5ibVnPZTib7CyqnFokJITWjzGdIP0Gn+JWVa6jtHTImWx1MtqiuVRDapU hrIoUIjf98HQn9/N5ylEFYQTw7tzaJNWeGUoGYS8+8n/0sNbuYQUU/zwMVY9wpJcrXaas6yZ XGpF/tua59t9LFCct+07YAUSWyaBXqBW3PKQz7QP+oE8yje91XrhOQam04eJhPIBLO88g6/U rdKaY7evBB8bJ76Zpn1yqsYOXwAxifD0gDcRTQcB2s5MYXYmizn2GoUm1MnCJeAfQCi/YMob R+c8xEEkRU83Tnnw3pmAbRU6OcPihEFuK/+SOMKIuV1QWmjkbAr4g9XeXvaN+TRJ9Hl/k1k/ sj+uOfyGIaFzM/fpaLmFk8vHeej4i2/C6cL4mnahwYBDHAfHO65ZUIBAssdA6AeJ+PGsYeYh qs6zkpaA2b0wT4f9s7BPSqi0Veky8bUYYY7WpjzDcHnj1gEeIU55EhOQ42dnEfv7WrIAXanO P8SjhgqAUkb3R88azZCpEMTHiCE4bFxzOmi5Ag0EWb/ZxQEQALaJE/3u23rTvPLkitaTJFqK kwPVylzkwmKdvd2qeEFk1qys2J3tACTMyYVnYTSXy5EJH2zJyhUfLnhLp8jJZF4oU5QehOaJ PcMmzI/CZS1AmH+jnm6pukdZAowTzJyt4IKSapr+7mxcxX1YQ2XewMnFYpLkAA2dHaChLSU/ EHJXe3+O4DgEURTFMa3SRN/J4GNMBacKXnMSSYylI5DcIOZ/v0IGa5MAXHrP1Hwm1rBmloIc gmzexczBf+IcWgCLThyFPffv+2pfLK1XaS82OzBC7fS01pB/eDOkjQuKy16sKZX6Rt57vud4 0uE5a0lpyItC2P7u7QWL4yT5pMF+oS8bm3YWgEntV380RyZpqgJGZTZLNq2T4ZgfiaueEV4J zOnG2/QRGjOUrNQaYzKy5V127CTnRg4BYF/uLEmizLcI3O3U1+mEz6h48wkAojO1B6AZ8Lm+ JuxOW5ouGcrkTEuIG56GcDwMWS/Pw/vNsDyNmOCjy9eEKWJgmMmLaq59HpfTd8IOeaYyuAQH AsYt/zzKy0giMgjhCQtuc99E4nQE9KZ44DKsnqRabK9s3zYE3PIkCFIEZcUiJXSXWWOIdJ43 j+YyFHU5hqXfECM6rzKGBeBUGTzyWcOX6YwRM4LzQDVJwYG8cVfth+v4/ImcXR43D4WVxxBE AjKag02b+1yfABEBAAGJAh8EGAECAAkFAlm/2cUCGwwACgkQE/zvid2ePE/dqQ/6ApUwgsZz tps0MOdRddjPwz44pWXS5MG45irMQXELGQyxkrafc8lwHeABYstoK8dpopTcJGE3dZGL3JNz 1YWxQ5AV4uyqBn5N8RubcA8NzR6DQP+OGPIwzMketvVC/cbbKDZqf0uTDy3jP65OFhSkTEIy nYv1Mb4JJl3Sq+haUbfWLAV5nboSuHmiZE6Bz2+TjdoVkNwHBfpqxu6MlWka+P98SUcmY8iV hPy9QC1XFOGdFDFf1kYgHW27mFwds35NQhNARgftAVz9FZXruW6tFIIfisjr3rVjD9R8VgL7 l5vMr9ylOFpepnI6+wd2X1566HW7F1Zw1DIrY2NHL7kL5635bHrJY4n7o/n7Elk/Ca/MAqzd IZxz6orfXeImsqZ6ODn4Y47PToS3Tr3bMNN9N6tmOPQZkJGHDBExbhAi/Jp8fpWxMmpVCUl6 c85cOBCR4s8tZsvGYOjR3CvqKrX4bb8GElrhOvAJa6DdmZXc7AyoVMaTvhpq3gJYKmC64oqt 7zwIHwaCxTbP6C6oUp9ENRV7nHnXN3BlvIgCo4QEs6HkDzkmgYlCEOKBiDyVMSkPDZdsspa+ K4GlU2Swi/BDJMjtDxyo+K0M81LXXxOeRfEIfPtZ3ddxBKPva1uSsuz+pbN9d1JY8Ko5T/h1 6susi2ReUyNJEJaSnjO5z13TQ1U= Organization: Red Hat Subject: Re: [RFC] perf tools: Filter out hidden symbols from labels Message-ID: <960f0b83-a623-67a6-ab55-d56139d10ba2@redhat.com> Date: Tue, 15 Jan 2019 16:13:16 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190115135354.11572-1-jolsa@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 15 Jan 2019 16:13:20 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Jiri, > When perf is built with annobin plugin (RHEL8 build) extra symbols > are added to its binary: A bit of background for those wondering why annobin is creating these symbols: Annobin is a plugin for gcc that records data about how object file were built. It is specifically designed to be able to cope with files that are built using multiple different sets of optimization options. (Eg because of #pragma directives or function specific optimization attributes). It generates notes to cover each compiled region of code, and it needs the symbols in order to be able to determine exactly which areas in a linked binary were compiled with which options. In the course of developing this plugin I encountered various problems with tools not expecting to find extra symbols in a binary. Hence I made the symbols local, hidden and with no type. It was the best I could do to say "ignore these symbols - they are not meant to be seen by anyone but annobin". > + elf_sym__visibility(sym) != STV_HIDDEN; Just to be awkward, if you are going to ignore STV_HIDDEN symbols then you should probably also ignore STV_INTERNAL ones as well... Annobin does not generate them, but you never know, one day some other tool might create some. Cheers Nick