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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 8BCCEC2D0BF for ; Tue, 10 Dec 2019 22:37:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 56D102077B for ; Tue, 10 Dec 2019 22:37:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576017441; bh=z6VNPAjdlwsXZf+UURspqWnK3HBDctgIcTjbgHC1vMo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tvfNs5knQhBfoQMMJYcxONPxiuVTMVx9BvoNTcr1uJWH+dlvJB+Gas7jrz1bBz2qz bBdwohFgrqjWnVTMVNYLnBXDjRf42KizmOSw0jxEwL2vtdzcK70HBcHvCsK/Ik0Zk9 Kj3qWbunW54146o5dnT8o4b4ZSGURUT5ug0sedCA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730094AbfLJWeC (ORCPT ); Tue, 10 Dec 2019 17:34:02 -0500 Received: from mail.kernel.org ([198.145.29.99]:54834 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729170AbfLJWdr (ORCPT ); Tue, 10 Dec 2019 17:33:47 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3D3ED208C3; Tue, 10 Dec 2019 22:33:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576017227; bh=z6VNPAjdlwsXZf+UURspqWnK3HBDctgIcTjbgHC1vMo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JV4TWomsTuezmxRHAo4wFizyDEos0VGnvslx1gKxnQOsWactQc3ctL+WxVMFXhF9H t8WUAYojR7s7pORiKC1SGFjXghhEWjPGvz9sA/UHkzBLGflqJH1EDOtuNvrVIY8LiL ZQXO8gSGAEnidt7r2irftxqYQ6r4yQIZdGfu/PGQ= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jin Yao , Alexander Shishkin , Andi Kleen , Jiri Olsa , Kan Liang , Peter Zijlstra , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH AUTOSEL 4.4 25/71] perf report: Add warning when libunwind not compiled in Date: Tue, 10 Dec 2019 17:32:30 -0500 Message-Id: <20191210223316.14988-25-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191210223316.14988-1-sashal@kernel.org> References: <20191210223316.14988-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jin Yao [ Upstream commit 800d3f561659b5436f8c57e7c26dd1f6928b5615 ] We received a user report that call-graph DWARF mode was enabled in 'perf record' but 'perf report' didn't unwind the callstack correctly. The reason was, libunwind was not compiled in. We can use 'perf -vv' to check the compiled libraries but it would be valuable to report a warning to user directly (especially valuable for a perf newbie). The warning is: Warning: Please install libunwind development packages during the perf build. Both TUI and stdio are supported. Signed-off-by: Jin Yao Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Cc: Kan Liang Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20191011022122.26369-1-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/builtin-report.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index f256fac1e7225..0f7ebac1846b5 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -285,6 +285,13 @@ static int report__setup_sample_type(struct report *rep) PERF_SAMPLE_BRANCH_ANY)) rep->nonany_branch_mode = true; +#ifndef HAVE_LIBUNWIND_SUPPORT + if (dwarf_callchain_users) { + ui__warning("Please install libunwind development packages " + "during the perf build.\n"); + } +#endif + return 0; } -- 2.20.1