From patchwork Tue Dec 1 08:54:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 335819 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 CA78FC83014 for ; Tue, 1 Dec 2020 09:16:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 67BA8206CB for ; Tue, 1 Dec 2020 09:16:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="bNI7Jg6f" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390216AbgLAJQe (ORCPT ); Tue, 1 Dec 2020 04:16:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:53158 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390308AbgLAJO1 (ORCPT ); Tue, 1 Dec 2020 04:14:27 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 C121022240; Tue, 1 Dec 2020 09:13:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1606814027; bh=C+gbUkguOSKc2B34TzXK9xji5pbE8YI3SBahlnIfLoI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bNI7Jg6fm7TB/Up+qbRwExuAVnHpze6nkfuaO2BipMEKFeMbgG9ksNtUNYeVQn1kf 8l999KGnonMjgVKhlu6n4Bb4X/RICRpR2zqZPPuqGciVWTSThpsfC+i71k4iHuBzzv OwZf/lKb4VH7dirx8YG15sUATbKvd257wBnzvwok= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Masami Hiramatsu , Sumanth Korikkar , Thomas Richter , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 5.9 140/152] perf probe: Fix to die_entrypc() returns error correctly Date: Tue, 1 Dec 2020 09:54:15 +0100 Message-Id: <20201201084730.140799760@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201201084711.707195422@linuxfoundation.org> References: <20201201084711.707195422@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Masami Hiramatsu [ Upstream commit ab4200c17ba6fe71d2da64317aae8a8aa684624c ] Fix die_entrypc() to return error correctly if the DIE has no DW_AT_ranges attribute. Since dwarf_ranges() will treat the case as an empty ranges and return 0, we have to check it by ourselves. Fixes: 91e2f539eeda ("perf probe: Fix to show function entry line as probe-able") Signed-off-by: Masami Hiramatsu Cc: Sumanth Korikkar Cc: Thomas Richter Link: http://lore.kernel.org/lkml/160645612634.2824037.5284932731175079426.stgit@devnote2 Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/util/dwarf-aux.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c index aa898014ad12f..03c1a39c312a8 100644 --- a/tools/perf/util/dwarf-aux.c +++ b/tools/perf/util/dwarf-aux.c @@ -373,6 +373,7 @@ bool die_is_func_def(Dwarf_Die *dw_die) int die_entrypc(Dwarf_Die *dw_die, Dwarf_Addr *addr) { Dwarf_Addr base, end; + Dwarf_Attribute attr; if (!addr) return -EINVAL; @@ -380,6 +381,13 @@ int die_entrypc(Dwarf_Die *dw_die, Dwarf_Addr *addr) if (dwarf_entrypc(dw_die, addr) == 0) return 0; + /* + * Since the dwarf_ranges() will return 0 if there is no + * DW_AT_ranges attribute, we should check it first. + */ + if (!dwarf_attr(dw_die, DW_AT_ranges, &attr)) + return -ENOENT; + return dwarf_ranges(dw_die, 0, &base, addr, &end) < 0 ? -ENOENT : 0; }