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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 10B1CC2D0F0 for ; Wed, 1 Apr 2020 16:44:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DB13B20714 for ; Wed, 1 Apr 2020 16:44:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585759481; bh=PL47H3m46y2ou7/kunfoWvBHfO+TqmJQviVQ9Y3h6/0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gTizuilThaM1KaOWFgzen003Uw84m9SesZawIY/RF5X6MQXWoEXP6vJEjWyo+s8cs LtruSPhNx53Oydz0L/0AnJlQUQ7+vg0DSII/OKgmSRqUziiutjsJ+ziLa6Xl7otOZP 400g431WSJfRL3h5Ne0OEk2xiDLjVl0zyZWNQRQk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389759AbgDAQoj (ORCPT ); Wed, 1 Apr 2020 12:44:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:45710 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388037AbgDAQoj (ORCPT ); Wed, 1 Apr 2020 12:44:39 -0400 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 845E520714; Wed, 1 Apr 2020 16:44:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585759479; bh=PL47H3m46y2ou7/kunfoWvBHfO+TqmJQviVQ9Y3h6/0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b+RaT6P4Maw2JuBINBYx+/h7EdpAsFywP6zX9nmqEqRePxuviVI1D/jXfX3W/h4lm l7ba7R1SczaGfGY1ChrZhcGhHrW4maoDtATHznjiSAk4OrLF0mxEm2ZM80KiluzADc HoI7mSBWtlQyBpekpA+qg2HVp5DBTTV2yUXFZc84= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexandre Ghiti , Masami Hiramatsu , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Peter Zijlstra , Sasha Levin , Arnaldo Carvalho de Melo Subject: [PATCH 4.14 093/148] perf probe: Do not depend on dwfl_module_addrsym() Date: Wed, 1 Apr 2020 18:18:05 +0200 Message-Id: <20200401161601.892799411@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200401161552.245876366@linuxfoundation.org> References: <20200401161552.245876366@linuxfoundation.org> User-Agent: quilt/0.66 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 From: Masami Hiramatsu commit 1efde2754275dbd9d11c6e0132a4f09facf297ab upstream. Do not depend on dwfl_module_addrsym() because it can fail on user-space shared libraries. Actually, same bug was fixed by commit 664fee3dc379 ("perf probe: Do not use dwfl_module_addrsym if dwarf_diename finds symbol name"), but commit 07d369857808 ("perf probe: Fix wrong address verification) reverted to get actual symbol address from symtab. This fixes it again by getting symbol address from DIE, and only if the DIE has only address range, it uses dwfl_module_addrsym(). Fixes: 07d369857808 ("perf probe: Fix wrong address verification) Reported-by: Alexandre Ghiti Signed-off-by: Masami Hiramatsu Tested-by: Alexandre Ghiti Cc: Alexander Shishkin Cc: Greg Kroah-Hartman Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Sasha Levin Link: http://lore.kernel.org/lkml/158281812176.476.14164573830975116234.stgit@devnote2 Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Greg Kroah-Hartman --- tools/perf/util/probe-finder.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -626,14 +626,19 @@ static int convert_to_trace_point(Dwarf_ return -EINVAL; } - /* Try to get actual symbol name from symtab */ - symbol = dwfl_module_addrsym(mod, paddr, &sym, NULL); + if (dwarf_entrypc(sp_die, &eaddr) == 0) { + /* If the DIE has entrypc, use it. */ + symbol = dwarf_diename(sp_die); + } else { + /* Try to get actual symbol name and address from symtab */ + symbol = dwfl_module_addrsym(mod, paddr, &sym, NULL); + eaddr = sym.st_value; + } if (!symbol) { pr_warning("Failed to find symbol at 0x%lx\n", (unsigned long)paddr); return -ENOENT; } - eaddr = sym.st_value; tp->offset = (unsigned long)(paddr - eaddr); tp->address = (unsigned long)paddr;