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,URIBL_BLOCKED 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 2F4A9C43142 for ; Thu, 2 Aug 2018 08:16:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E597A2146D for ; Thu, 2 Aug 2018 08:16:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E597A2146D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zytor.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732037AbeHBKGa (ORCPT ); Thu, 2 Aug 2018 06:06:30 -0400 Received: from terminus.zytor.com ([198.137.202.136]:36775 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729691AbeHBKGa (ORCPT ); Thu, 2 Aug 2018 06:06:30 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id w728GHCk3431735 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 2 Aug 2018 01:16:17 -0700 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id w728GHn93431731; Thu, 2 Aug 2018 01:16:17 -0700 Date: Thu, 2 Aug 2018 01:16:17 -0700 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for Arnaldo Carvalho de Melo Message-ID: Cc: namhyung@kernel.org, wangnan0@huawei.com, mingo@kernel.org, tglx@linutronix.de, linux-kernel@vger.kernel.org, hpa@zytor.com, acme@redhat.com, dsahern@gmail.com, adrian.hunter@intel.com, jolsa@kernel.org Reply-To: tglx@linutronix.de, mingo@kernel.org, wangnan0@huawei.com, namhyung@kernel.org, hpa@zytor.com, dsahern@gmail.com, acme@redhat.com, linux-kernel@vger.kernel.org, jolsa@kernel.org, adrian.hunter@intel.com To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf bpf: Show better message when failing to load an object Git-Commit-ID: 739e2edc848af30fefa66d6c422c00ca9a701c06 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 739e2edc848af30fefa66d6c422c00ca9a701c06 Gitweb: https://git.kernel.org/tip/739e2edc848af30fefa66d6c422c00ca9a701c06 Author: Arnaldo Carvalho de Melo AuthorDate: Tue, 31 Jul 2018 11:58:57 -0300 Committer: Arnaldo Carvalho de Melo CommitDate: Tue, 31 Jul 2018 11:58:57 -0300 perf bpf: Show better message when failing to load an object Before: libbpf: license of tools/perf/examples/bpf/etcsnoop.c is GPL libbpf: section(6) version, size 4, link 0, flags 3, type=1 libbpf: kernel version of tools/perf/examples/bpf/etcsnoop.c is 41200 libbpf: section(7) .symtab, size 120, link 1, flags 0, type=2 bpf: config program 'syscalls:sys_enter_openat' libbpf: load bpf program failed: Operation not permitted libbpf: failed to load program 'syscalls:sys_enter_openat' libbpf: failed to load object 'tools/perf/examples/bpf/etcsnoop.c' bpf: load objects failed After: (just the last line changes) bpf: load objects failed: err=-4009: (Incorrect kernel version) Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-wi44iid0yjfht3lcvplc75fm@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/bpf-loader.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c index cee658733e2c..3d02ae38ec56 100644 --- a/tools/perf/util/bpf-loader.c +++ b/tools/perf/util/bpf-loader.c @@ -747,7 +747,9 @@ int bpf__load(struct bpf_object *obj) err = bpf_object__load(obj); if (err) { - pr_debug("bpf: load objects failed\n"); + char bf[128]; + libbpf_strerror(err, bf, sizeof(bf)); + pr_debug("bpf: load objects failed: err=%d: (%s)\n", err, bf); return err; } return 0;