From patchwork Thu Aug 16 16:40:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Masami Hiramatsu (Google)" X-Patchwork-Id: 10567837 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8A6FB139A for ; Thu, 16 Aug 2018 16:40:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 78DD72B47E for ; Thu, 16 Aug 2018 16:40:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6D34D2B506; Thu, 16 Aug 2018 16:40:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1E5172B47E for ; Thu, 16 Aug 2018 16:40:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392524AbeHPTk2 (ORCPT ); Thu, 16 Aug 2018 15:40:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:53636 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727949AbeHPTk2 (ORCPT ); Thu, 16 Aug 2018 15:40:28 -0400 Received: from localhost.localdomain (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (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 B0249208E9; Thu, 16 Aug 2018 16:40:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1534437653; bh=yOeR/MG0QqRDR6THa5CfdWNDZOLwmhLwoyVVk2BJFnM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ttnZrEFFe/iryaqwhBxZgppHd5egfSrSCO2fa6gjvY2fdX+Hdq1BuBwrBG06zHotK pAFkbzFyJqTZqbCSpyTG32jig4HjL71XTR4qI7pbZzFEZh6Quh+F2qU2BnCvY0kKcE FCgkppvKTEAHkfq4ic4SSU+kLOpMBtev5hZiKL5E= From: Masami Hiramatsu To: Shuah Khan , Steven Rostedt Cc: Ingo Molnar , Masami Hiramatsu , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 24/32] selftests/ftrace: Add max stack tracer testcase Date: Fri, 17 Aug 2018 01:40:30 +0900 Message-Id: <153443763074.23257.4052504725796725062.stgit@devbox> X-Mailer: git-send-email 2.13.6 In-Reply-To: <153443695002.23257.13628220023468200991.stgit@devbox> References: <153443695002.23257.13628220023468200991.stgit@devbox> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a testcase for max stack tracer, which checks basic max stack usage tracing and its filter feature. Signed-off-by: Masami Hiramatsu --- .../ftrace/test.d/ftrace/func_stack_tracer.tc | 39 ++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func_stack_tracer.tc diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_stack_tracer.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_stack_tracer.tc new file mode 100644 index 000000000000..b414f0e3c646 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_stack_tracer.tc @@ -0,0 +1,39 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: ftrace - Max stack tracer +# Test the basic function of max-stack usage tracing + +if [ ! -f stack_trace ]; then + echo "Max stack tracer is not supported - please make CONFIG_STACK_TRACER=y" + exit_unsupported +fi + +echo > stack_trace_filter +echo 0 > stack_max_size +echo 1 > /proc/sys/kernel/stack_tracer_enabled + +: "Fork and wait for the first entry become !lock" +timeout=10 +while [ $timeout -ne 0 ]; do + ( echo "forked" ) + FL=`grep " 0)" stack_trace` + echo $FL | grep -q "lock" || break; + timeout=$((timeout - 1)) +done +echo 0 > /proc/sys/kernel/stack_tracer_enabled + +echo '*lock*' > stack_trace_filter +test `cat stack_trace_filter | wc -l` -eq `grep lock stack_trace_filter | wc -l` + +echo 0 > stack_max_size +echo 1 > /proc/sys/kernel/stack_tracer_enabled + +: "Fork and always the first entry including lock" +timeout=10 +while [ $timeout -ne 0 ]; do + ( echo "forked" ) + FL=`grep " 0)" stack_trace` + echo $FL | grep -q "lock" + timeout=$((timeout - 1)) +done +echo 0 > /proc/sys/kernel/stack_tracer_enabled