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=-7.5 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 A4183C433DB for ; Thu, 14 Jan 2021 19:14:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4992123B3E for ; Thu, 14 Jan 2021 19:14:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728296AbhANTOR (ORCPT ); Thu, 14 Jan 2021 14:14:17 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:56070 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725883AbhANTOR (ORCPT ); Thu, 14 Jan 2021 14:14:17 -0500 Received: from pps.filterd (m0148461.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 10EJ8Sku021399; Thu, 14 Jan 2021 11:13:23 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=subject : to : cc : references : from : message-id : date : in-reply-to : content-type : content-transfer-encoding : mime-version; s=facebook; bh=3ss0qb+We8mmU+g4wsn+cbX3vxiAghiQFMuJbupimF4=; b=CrERExtQ0B78fRHStj2fixuA3I8x0hcwvIryC89keyTFhgStJf0nSaputM3G+22qlA61 d3ORf138mI7ozPv4sOB9PDUQpEuqsTwoA0znygQdjBjc3i6Zn5uUtKGr3/iBQEuLDxst rktT4uOq6ZEwkCWTGfreOLcD4yeqVdLalUY= Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com with ESMTP id 361fppmmvu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Thu, 14 Jan 2021 11:13:23 -0800 Received: from NAM12-DM6-obe.outbound.protection.outlook.com (100.104.98.9) by o365-in.thefacebook.com (100.104.94.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Thu, 14 Jan 2021 11:13:22 -0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=AKX5Nrg0kgDMgSP6ZQbyJ+G/ZYqMqPwAb5VMjAutHJZ0TXkj8cz0N7gy3ZjH+DKqhxhhpy50mVDsQ5BYmLk5u5Aoy8uErFRwF5qw8ykkcSsFA+phutIEGjSM1toDFtsHwkvpSsVaggfbYgloH9ZaBBQEDQsnRDyIaR1mGXrgFR5RKOmV96PCWkIhz9sCJjenDZrLyBRfx78E7DHKhL9Zq8DWv32pY0waEPpqAIKdqcvGnn8LG6QQ7Yw/p3dWHswTqDL5RIu3zFkX+HXhxPRvODSM3SrYFyESwEJIqtHb48rSmxJ0U2sdlLZPfVyGV86IomwrH4cPQ5t+9u34YdLukg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=3ss0qb+We8mmU+g4wsn+cbX3vxiAghiQFMuJbupimF4=; b=kB8rJyYgCW5AXafjYsaedM+kAqTyr/4ud0VLxLGZ6vPnsfgA54/D8vENyzra2KLP6s5oZ8VVAj+Ftq9CWs4GcuxAO43rQg8tmPD8eiygOk+ly2AHovrheqRoAB350PSIbzwjn4teA3xnQd1hq47X7DqPaJmEjUNCk1FxdxBJVCcbmLb/bb8qktNYRK2HbNFrmeauAO4fOGOvTsCbIoP510PIWfXPUDBiVPFExOLlpFB3vZKcvrzPL+wHjNaB607L+RauefaFqRllsLOzywsYqiUemLX+NNoC4AAXPxpJrCjxKW+0tpKi/iwBQAfUAA3GxfEGnvXeaEx5Nwspqrt46A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=fb.com; dmarc=pass action=none header.from=fb.com; dkim=pass header.d=fb.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.onmicrosoft.com; s=selector2-fb-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=3ss0qb+We8mmU+g4wsn+cbX3vxiAghiQFMuJbupimF4=; b=BcW5KHUgIcMH3MFeldTdFGrRW2o1p7W8e2IPQNQBsKFd1DS4rgrGPWjxA2YHvVddu4gCkcLM/gJ9PBc9+TGk0kXBTZy1p5a0c8RYmLry7t2q39SrRgK+fb7BwEPDmsr3cEjL4OKImLslrUt0T2lGE+v1OYZgfhLS5PGbYz3+7vc= Authentication-Results: gmail.com; dkim=none (message not signed) header.d=none;gmail.com; dmarc=none action=none header.from=fb.com; Received: from BYAPR15MB4088.namprd15.prod.outlook.com (2603:10b6:a02:c3::18) by BY5PR15MB3668.namprd15.prod.outlook.com (2603:10b6:a03:1fb::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3742.12; Thu, 14 Jan 2021 19:13:21 +0000 Received: from BYAPR15MB4088.namprd15.prod.outlook.com ([fe80::9ae:1628:daf9:4b03]) by BYAPR15MB4088.namprd15.prod.outlook.com ([fe80::9ae:1628:daf9:4b03%7]) with mapi id 15.20.3763.011; Thu, 14 Jan 2021 19:13:21 +0000 Subject: Re: [PATCH v3 0/2] Kbuild: DWARF v5 support To: Nick Desaulniers , Jiri Olsa , Andrii Nakryiko , Arnaldo Carvalho de Melo CC: Caroline Tice , Arvind Sankar , Jakub Jelinek , Fangrui Song , Clang-Built-Linux ML , Nick Clifton , bpf , Masahiro Yamada , Sedat Dilek References: <20201204011129.2493105-1-ndesaulniers@google.com> <20201204011129.2493105-3-ndesaulniers@google.com> From: Yonghong Song Message-ID: <5707cd3c-03f2-a806-c087-075d4f207bee@fb.com> Date: Thu, 14 Jan 2021 11:13:18 -0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.6.1 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [2620:10d:c090:400::5:ab59] X-ClientProxiedBy: MWHPR1401CA0019.namprd14.prod.outlook.com (2603:10b6:301:4b::29) To BYAPR15MB4088.namprd15.prod.outlook.com (2603:10b6:a02:c3::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [IPv6:2620:10d:c085:21e1::13f6] (2620:10d:c090:400::5:ab59) by MWHPR1401CA0019.namprd14.prod.outlook.com (2603:10b6:301:4b::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3763.9 via Frontend Transport; Thu, 14 Jan 2021 19:13:20 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 72afb3c7-5667-43d8-0408-08d8b8c07593 X-MS-TrafficTypeDiagnostic: BY5PR15MB3668: X-Microsoft-Antispam-PRVS: X-FB-Source: Internal X-MS-Oob-TLC-OOBClassifiers: OLM:9508; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: rfkWcBugolfxPnYzCE4+hoF2zdi2Ei1RWAimEbQ0MhXvT+CQP4rIdcMmNjzcmIkp8SnUxQGnoWXyDoxK4s4FN7zgDkGgXBEgNU3RkfDVPVIzx+30u5Rf2GMwr4lmrSjyFT32WiIPOi84YnD0kjAsEUscCEPr5G0p23pzrheG/lLErYNxPa6DIVBFi69SXlFBjjhYw7HvaAVI5bUUVoVHfMcMKrV3mOm8kDM9SMVKtE8JpIZaxo7eeKygfSShkCapBDPcVYjYYebSE5ums7m/6Zpvlk2G9sXYojPGIN5t6aJ5DockSaIHxijchFZsDfvyST0V30Qj9LQfiGt6JaSRLOxUZVEfDUHK+2QHEKlTBKLszA6vgGYCV2QT2iMjDkM7G5TGWt1EpwMlo1fWrn/o/4CoT3I/6pcOF3+nLR1o1K2zUSMpgBPKyyaYhodRuGEO4ozuaFD/EhJsQ7Z4Yr9nzimYPjwB1ysskpoPnSHPGUA= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BYAPR15MB4088.namprd15.prod.outlook.com;PTR:;CAT:NONE;SFS:(39860400002)(376002)(366004)(346002)(396003)(136003)(186003)(7416002)(83380400001)(8676002)(5660300002)(66946007)(8936002)(16526019)(4326008)(31686004)(316002)(53546011)(6486002)(2616005)(52116002)(86362001)(31696002)(66556008)(66476007)(36756003)(478600001)(110136005)(2906002)(54906003)(43740500002)(45980500001);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData: =?utf-8?B?cVdpekNncmJOREhsdG1VTDJ2eGZONVlqSUZZQUthdld3OVlkUU5lWHlxZkpW?= =?utf-8?B?VWNFekNjR3hOeUdSRTh2RytmTnRiNERjQTBDWi9DZUJVczNVVHovWnZZdkpl?= =?utf-8?B?Nm0rUGRKNEhxNGtsNm9GOGhFclFndzVra28zSHdtdU90eWpPVm5OdjF5Y29m?= =?utf-8?B?NW9ZalhoVmtJaWhFS0JCMDF2L1V5enlZSk5OREpReFlFNVhmS3VjKzJ3Q2Fn?= =?utf-8?B?azg5dGtqMkpKeVZhRWpQQnhwNlJSdTBDSE1CeUt1V3V2eWlXYTBGZndqdzRp?= =?utf-8?B?R1c5YnBuOWdCbHBBay90dGxEL2pWUnRRZ2pleEN3ckJmQ29sc0pEZm1VcGo2?= =?utf-8?B?SFZXeC95elFpV2pRZEt0U2RFUWpVOG5YR0lvSnJ3NGE0S2tnK2V5SU9mbHhZ?= =?utf-8?B?YWI5emlsMXlweVY3NW02Q0NsSWJKR1R0T1FOMHl5bmdrdnFrU01PSythb1Bk?= =?utf-8?B?d1o0SWkweUVTNEhFbENxSmY0YWJUWThJSjBlQ205MExucGFZblRHYUpJUEh3?= =?utf-8?B?RERGdWUrTXVQb3hPT3V1bFBFWDZVaWgxdWtrN281M0I3ZzV2WEJ3M3VMZGFP?= =?utf-8?B?dnpMWXVOVEJHOG43dGVqWjZyNGtpcWNYRDE5QVR1S3lXVkpwSGFnV2M2WURo?= =?utf-8?B?YkVubE5UYWVuczl1L2ozaTk4ZkJKZUFMdElGUVdUMmt3RVh3bmpzelJ5TlR0?= =?utf-8?B?UkxLNW9QYU9PVXl1R0VFNTVIMFdQdDRlVk83NzliMzVucjRzSm04SXd0N1hu?= =?utf-8?B?L3RKaC8rVm5tb1BuMk0wT3RhME9QTlAyMmFQTkNyU1pBYUNvQm1BZWtza0N6?= =?utf-8?B?aEV5NWhDQnRZRE5UeGdxdGVtT2lZbUVqaVhlZGptSHQ1eFdzN0J1YTJhRDR0?= =?utf-8?B?L1BvOUNTZUptQW42TittdmU5UFltcGRVS09hbmUrZloxMXVRUUFvZW5wQXEr?= =?utf-8?B?V0YxUTQ3TWQ3TkRUYmhuakp0TnNZbWtSZnVxSFJRM3BENmpDQzd5MVFMc1Va?= =?utf-8?B?SVFVcGRQcUxpTmVCbVdkSmppWU05RDhQTWxyd0Q0UGYzMVIrV3RBN0VhdEVK?= =?utf-8?B?cnJ0L1BRVnhtNU0zdWNBQnpUUXlreS9OemUvRUo4TWJMSHBrOUQrRWVkRE1E?= =?utf-8?B?U0dOdUtVaE1rWm53SytPKzBDcExHU1NTUDU5ZmlVUHZRZlZYZ0Z5S1YyQy85?= =?utf-8?B?Y2NtaU5GdWxPM1ZadkNwcVhGREF2TUxQN1ErZlUybzlxZUt4VWtJYS9EbWwy?= =?utf-8?B?cGlGdWNZZkNXdng5ZUd3UTBTbm1zVkd2aFVJNkQxb09mMXhBcWVvUUFRdFM2?= =?utf-8?B?cHRuQXV2aHNmbEpRVTdJVnlPTTZlUC9zZVdIdXNkYXFNbksxaUU5RlIxYnBB?= =?utf-8?B?Z1Z0Mld6RDcwdEE9PQ==?= X-MS-Exchange-CrossTenant-AuthSource: BYAPR15MB4088.namprd15.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Jan 2021 19:13:21.7846 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 8ae927fe-1255-47a7-a2af-5f3a069daaa2 X-MS-Exchange-CrossTenant-Network-Message-Id: 72afb3c7-5667-43d8-0408-08d8b8c07593 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 4y642P36e/4o6/SsFtbemszqGrx9OC2tZf6l7InMnzEldD5KVei9BgFrsJA2vH3T X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR15MB3668 X-OriginatorOrg: fb.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2021-01-14_07:2021-01-14,2021-01-14 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 mlxlogscore=598 mlxscore=0 phishscore=0 spamscore=0 clxscore=1011 bulkscore=0 impostorscore=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101140109 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On 1/14/21 11:01 AM, Nick Desaulniers wrote: > On Thu, Jan 14, 2021 at 10:53 AM Nick Desaulniers > wrote: >> >> On Wed, Jan 13, 2021 at 10:18 PM Sedat Dilek wrote: >>> >>> On Wed, Jan 13, 2021 at 11:25 PM Caroline Tice wrote: >>>> >>>> On Tue, Jan 12, 2021 at 3:17 PM Sedat Dilek wrote: >>>>> >>>>> Unfortunately, I see with CONFIG_DEBUG_INFO_DWARF5=y and >>>>> CONFIG_DEBUG_INFO_BTF=y: >>>>> >>>>> die__process_inline_expansion: DW_TAG_INVALID (0x48) @ <0x3f0dd5a> not handled! >>>>> die__process_function: DW_TAG_INVALID (0x48) @ <0x3f0dd69> not handled! >> >> I can confirm that I see a stream of these warnings when building with >> this patch series applied, and those two configs enabled. >> >> rebuilding with `make ... V=1`, it looks like the call to: >> >> + pahole -J .tmp_vmlinux.btf >> >> is triggering these. >> >> Shall I send a v4 that adds a Kconfig dependency on !DEBUG_INFO_BTF? >> Does pahole have a bug tracker? pahole could have issues for dwarf5 since as far as I know, people just use dwarf2/dwarf4 with config functions in the kernel. Where is the link of the patch to add CONFIG_DEBUG_INFO_DWARF5 to linux? I think you can add CONFIG_DEBUG_INFO_DWARF5 to kernel with dependency of !CONFIG_DEBUG_INFO_BTF. At the same time, people can debug pahole issues. Once it is resolved, !CONFIG_DEBUG_INFO_BTF dependency can be removed with proper pahole version change in kernel. > > FWIW, my distro packages pahole v1.17; rebuilt with ToT v1.19 from > source and also observe the issue. >