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=-3.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED, USER_AGENT_GIT 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 0567EC28CF6 for ; Wed, 1 Aug 2018 21:38:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AE3E1208B2 for ; Wed, 1 Aug 2018 21:38:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="wWbxunhq" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AE3E1208B2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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 S1732692AbeHAXZt (ORCPT ); Wed, 1 Aug 2018 19:25:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:39954 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732652AbeHAXZt (ORCPT ); Wed, 1 Aug 2018 19:25:49 -0400 Received: from jouet.infradead.org (unknown [179.97.41.186]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 451C4208AD; Wed, 1 Aug 2018 21:37:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1533159481; bh=QmQOFFUl4xNjk6SvM7rejHUGMYatfZ0udVEvbZmQKXE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wWbxunhquefkY187VjZhMjnMjg0EQdlFfUyHtNXBmzanr7L4bjeRpI0J68lhhSxh+ IbX5Zegd/h9a/BoTwfV+URITqlBk3AKE0NR5oElajcKlJFUJKIFmjoVAxPpDSozdP+ UNmbc3nts6PuXIffR4EN0mBg0PXx1c6TGWAK6iT0= From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Arnaldo Carvalho de Melo , Adrian Hunter , David Ahern , Jiri Olsa , Namhyung Kim , Wang Nan Subject: [PATCH 18/21] perf bpf: Show better message when failing to load an object Date: Wed, 1 Aug 2018 18:36:45 -0300 Message-Id: <20180801213648.4814-19-acme@kernel.org> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20180801213648.4814-1-acme@kernel.org> References: <20180801213648.4814-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arnaldo Carvalho de Melo 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; -- 2.14.4