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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 4B9FEC4360F for ; Tue, 12 Mar 2019 17:23:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1F3DA217F4 for ; Tue, 12 Mar 2019 17:23:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552411426; bh=P/nOo7cIVFX58E2W/z2nPmlxswPq2/meKMdJvABwKMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=HW5z7quLf1gziJ4Kt0zaVzMeZz+PbhoDgtPe6QlyxlJspvAs07OTLqy93pVjw7aLw MT6CrwPjS2roumq9vN9YbXlgCf1wOJbxktRJwln2AuYkImj851Bq5rdnBzXZJwcQO0 eQ9jRzYEVhgh8iIGuDQk5IEujzy9pbfFkGECWsa0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729849AbfCLRR6 (ORCPT ); Tue, 12 Mar 2019 13:17:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:60186 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729417AbfCLRRD (ORCPT ); Tue, 12 Mar 2019 13:17:03 -0400 Received: from localhost (unknown [104.133.8.98]) (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 D16BA206DF; Tue, 12 Mar 2019 17:17:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552411022; bh=P/nOo7cIVFX58E2W/z2nPmlxswPq2/meKMdJvABwKMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zdMIqLkj2Im2cioGk3OL/3KV2rt7IOEt+m2kb6hWFXikP48CGEkv1f4s4mxi+AIop 2B522SJi6LKcSORs58SlNyAILOzpiRyo3zM8W/aNno/YRRkFoiQRWsvLT6P3Wf88Dd NK0vTMH+I/p8bqUZJK7sG2lxer57pYOKeg7aYZKk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jiri Olsa , Alexander Shishkin , Masami Hiramatsu , Michael Petlan , Namhyung Kim , Nick Clifton , Peter Zijlstra , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 4.14 112/135] perf symbols: Filter out hidden symbols from labels Date: Tue, 12 Mar 2019 10:09:19 -0700 Message-Id: <20190312170351.539189014@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190312170341.127810985@linuxfoundation.org> References: <20190312170341.127810985@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 59a17706915fe5ea6f711e1f92d4fb706bce07fe ] When perf is built with the annobin plugin (RHEL8 build) extra symbols are added to its binary: # nm perf | grep annobin | head -10 0000000000241100 t .annobin_annotate.c 0000000000326490 t .annobin_annotate.c 0000000000249255 t .annobin_annotate.c_end 00000000003283a8 t .annobin_annotate.c_end 00000000001bce18 t .annobin_annotate.c_end.hot 00000000001bce18 t .annobin_annotate.c_end.hot 00000000001bc3e2 t .annobin_annotate.c_end.unlikely 00000000001bc400 t .annobin_annotate.c_end.unlikely 00000000001bce18 t .annobin_annotate.c.hot 00000000001bce18 t .annobin_annotate.c.hot ... Those symbols have no use for report or annotation and should be skipped. Moreover they interfere with the DWARF unwind test on the PPC arch, where they are mixed with checked symbols and then the test fails: # perf test dwarf -v 59: Test dwarf unwind : --- start --- test child forked, pid 8515 unwind: .annobin_dwarf_unwind.c:ip = 0x10dba40dc (0x2740dc) ... got: .annobin_dwarf_unwind.c 0x10dba40dc, expecting test__arch_unwind_sample unwind: failed with 'no error' The annobin symbols are defined as NOTYPE/LOCAL/HIDDEN: # readelf -s ./perf | grep annobin | head -1 40: 00000000001bce4f 0 NOTYPE LOCAL HIDDEN 13 .annobin_init.c They can still pass the check for the label symbol. Adding check for HIDDEN and INTERNAL (as suggested by Nick below) visibility and filter out such symbols. > Just to be awkward, if you are going to ignore STV_HIDDEN > symbols then you should probably also ignore STV_INTERNAL ones > as well... Annobin does not generate them, but you never know, > one day some other tool might create some. Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Masami Hiramatsu Cc: Michael Petlan Cc: Namhyung Kim Cc: Nick Clifton Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20190128133526.GD15461@krava Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/util/symbol-elf.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 8ad4296de98b..3d39332b3a06 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -87,6 +87,11 @@ static inline uint8_t elf_sym__type(const GElf_Sym *sym) return GELF_ST_TYPE(sym->st_info); } +static inline uint8_t elf_sym__visibility(const GElf_Sym *sym) +{ + return GELF_ST_VISIBILITY(sym->st_other); +} + #ifndef STT_GNU_IFUNC #define STT_GNU_IFUNC 10 #endif @@ -111,7 +116,9 @@ static inline int elf_sym__is_label(const GElf_Sym *sym) return elf_sym__type(sym) == STT_NOTYPE && sym->st_name != 0 && sym->st_shndx != SHN_UNDEF && - sym->st_shndx != SHN_ABS; + sym->st_shndx != SHN_ABS && + elf_sym__visibility(sym) != STV_HIDDEN && + elf_sym__visibility(sym) != STV_INTERNAL; } static bool elf_sym__is_a(GElf_Sym *sym, enum map_type type) -- 2.19.1