From patchwork Fri Jun 19 14:33:29 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: 223650 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=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 ABBFDC433DF for ; Fri, 19 Jun 2020 16:49:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 84BEE206B7 for ; Fri, 19 Jun 2020 16:49:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592585372; bh=fYGT94RVlSqFBbVkuu6cX5onsmJbI1TJLFggoNOI1GU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Yhe/afxiUjoDN/278w7iWm9IvjIRwyqWSuBJB2/ceUFGfaUn8cOS4nZ/xu1EmqBcH WJfr+sRLlXGNkyiAwdP5aWy2kG2LOhKezDmxmImAKCOlekHctENMU0p/N5eBXdI6ag fXDNshIVK/5JjFxhX/o2WqujfKOlIaxR0Ewj2TD0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388069AbgFSQtX (ORCPT ); Fri, 19 Jun 2020 12:49:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:57262 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388063AbgFSOjl (ORCPT ); Fri, 19 Jun 2020 10:39:41 -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 966E320CC7; Fri, 19 Jun 2020 14:39:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592577581; bh=fYGT94RVlSqFBbVkuu6cX5onsmJbI1TJLFggoNOI1GU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GsFLEkBcsR5mTFIZTg+c9Ccn4gStJRL/VTN5CsNOGRkqQ7lzoTP48U1CY8YHlyx5A mJEmYdfUPW6bwJ/MnXWMvCGIy4joMKzItiYj1i1GFpaFx9TduCzK5xlQwVA0uJn99K Fdsx3NNxXoMjhUhA68mu/VdjK+2rN8G38LTB4gHI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Masami Hiramatsu , Arnaldo Carvalho de Melo , Jiri Olsa , Namhyung Kim Subject: [PATCH 4.4 100/101] perf probe: Do not show the skipped events Date: Fri, 19 Jun 2020 16:33:29 +0200 Message-Id: <20200619141619.219558899@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141614.001544111@linuxfoundation.org> References: <20200619141614.001544111@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 commit f41ebe9defacddeae96a872a33f0f22ced0bfcef upstream. When a probe point is expanded to several places (like inlined) and if some of them are skipped because of blacklisted or __init function, those trace_events has no event name. It must be skipped while showing results. Without this fix, you can see "(null):(null)" on the list, # ./perf probe request_resource reserve_setup is out of .text, skip it. Added new events: (null):(null) (on request_resource) probe:request_resource (on request_resource) You can now use it in all perf tools, such as: perf record -e probe:request_resource -aR sleep 1 # With this fix, it is ignored: # ./perf probe request_resource reserve_setup is out of .text, skip it. Added new events: probe:request_resource (on request_resource) You can now use it in all perf tools, such as: perf record -e probe:request_resource -aR sleep 1 # Fixes: 5a51fcd1f30c ("perf probe: Skip kernel symbols which is out of .text") Signed-off-by: Masami Hiramatsu Tested-by: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Namhyung Kim Cc: stable@vger.kernel.org Link: http://lore.kernel.org/lkml/158763968263.30755.12800484151476026340.stgit@devnote2 Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Greg Kroah-Hartman --- tools/perf/builtin-probe.c | 3 +++ 1 file changed, 3 insertions(+) --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -336,6 +336,9 @@ static int perf_add_probe_events(struct for (k = 0; k < pev->ntevs; k++) { struct probe_trace_event *tev = &pev->tevs[k]; + /* Skipped events have no event name */ + if (!tev->event) + continue; /* We use tev's name for showing new events */ show_perf_probe_event(tev->group, tev->event, pev,