From patchwork Thu Jan 2 22:06:51 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: 234698 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, 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 10BD3C3276C for ; Thu, 2 Jan 2020 22:35:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DAD4521D7D for ; Thu, 2 Jan 2020 22:35:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004513; bh=+YjcYkDj2yiD9m6qHDqjHMTxC16tBLn4mcmA1+IBmBs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wTNB2UHOL+Uhj1PTn9Xwik6+n1O0rKBbi15MOsVuP5G1XUCOpi13c0+ypsYoVZpux d+oX3A0hkuoTPrihxVGb5QqsAYVYIwYEHgv8hNVkn0pn1+V0qtrjhd+LiE6lA2xNpK jGRJt6gRprMFL/14WYq4xTcIM4LZo3PJRCTywm08= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730496AbgABWfN (ORCPT ); Thu, 2 Jan 2020 17:35:13 -0500 Received: from mail.kernel.org ([198.145.29.99]:44712 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730778AbgABWfM (ORCPT ); Thu, 2 Jan 2020 17:35:12 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 215A720866; Thu, 2 Jan 2020 22:35:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004511; bh=+YjcYkDj2yiD9m6qHDqjHMTxC16tBLn4mcmA1+IBmBs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y3FVrzD5ZTYBPOJi2f8gfBjgJtHvhAS//b2lJ3OybthFbXcGTmsU3Db//NaPSwUBQ V/mWajMynbKau6jdWod/4A8/WHv/NEl6qh+A2Mo8lAhZpHhl1rD61geKnZHkghZp01 kw6JS6a+Apdg6B8zE6BIdOljDc1AT7npIroncezQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Masami Hiramatsu , Jiri Olsa , Namhyung Kim , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 4.4 038/137] perf probe: Fix to find range-only function instance Date: Thu, 2 Jan 2020 23:06:51 +0100 Message-Id: <20200102220551.761090623@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200102220546.618583146@linuxfoundation.org> References: <20200102220546.618583146@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Masami Hiramatsu [ Upstream commit b77afa1f810f37bd8a36cb1318178dfe2d7af6b6 ] Fix die_is_func_instance() to find range-only function instance. In some case, a function instance can be made without any low PC or entry PC, but only with address ranges by optimization. (e.g. cold text partially in "text.unlikely" section) To find such function instance, we have to check the range attribute too. Fixes: e1ecbbc3fa83 ("perf probe: Fix to handle optimized not-inlined functions") Signed-off-by: Masami Hiramatsu Cc: Jiri Olsa Cc: Namhyung Kim Link: http://lore.kernel.org/lkml/157190835669.1859.8368628035930950596.stgit@devnote2 Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/util/dwarf-aux.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c index a509aa8433a1..af78d6fc8d12 100644 --- a/tools/perf/util/dwarf-aux.c +++ b/tools/perf/util/dwarf-aux.c @@ -304,10 +304,14 @@ bool die_is_func_def(Dwarf_Die *dw_die) bool die_is_func_instance(Dwarf_Die *dw_die) { Dwarf_Addr tmp; + Dwarf_Attribute attr_mem; /* Actually gcc optimizes non-inline as like as inlined */ - return !dwarf_func_inline(dw_die) && dwarf_entrypc(dw_die, &tmp) == 0; + return !dwarf_func_inline(dw_die) && + (dwarf_entrypc(dw_die, &tmp) == 0 || + dwarf_attr(dw_die, DW_AT_ranges, &attr_mem) != NULL); } + /** * die_get_data_member_location - Get the data-member offset * @mb_die: a DIE of a member of a data structure