From patchwork Sat Aug 21 14:29:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Rostedt X-Patchwork-Id: 501194 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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS 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 44143C4320E for ; Sat, 21 Aug 2021 14:30:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1FE8F6124F for ; Sat, 21 Aug 2021 14:30:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230233AbhHUOaw (ORCPT ); Sat, 21 Aug 2021 10:30:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:45842 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232093AbhHUOaw (ORCPT ); Sat, 21 Aug 2021 10:30:52 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (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 B98B061266; Sat, 21 Aug 2021 14:30:12 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.94.2) (envelope-from ) id 1mHS0h-004wpC-Om; Sat, 21 Aug 2021 10:30:11 -0400 Message-ID: <20210821143011.599117217@goodmis.org> User-Agent: quilt/0.66 Date: Sat, 21 Aug 2021 10:29:09 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , "Tzvetomir Stoyanov" , Tom Zanussi , Shuah Khan , Shuah Khan , linux-kselftest@vger.kernel.org, Masami Hiramatsu Subject: [for-next][PATCH 5/6] selftests/ftrace: Add selftest for testing eprobe events on synthetic events References: <20210821142904.655644298@goodmis.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: "Steven Rostedt (VMware)" Add a test to test event probes, by creating a synthetic event across sys_enter_openat and sys_exit_openat that passes the filename pointer from the enter of the system call to the exit, and then add an event probe to the synthetic event to make sure that the file name is seen. Link: https://lore.kernel.org/linux-kselftest/20210819152825.526931866@goodmis.org/ Link: https://lkml.kernel.org/r/20210820204742.463259900@goodmis.org Cc: "Tzvetomir Stoyanov" Cc: Tom Zanussi Cc: Shuah Khan Cc: Shuah Khan Cc: linux-kselftest@vger.kernel.org Acked-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) --- .../inter-event/trigger-synthetic-eprobe.tc | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc diff --git a/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc new file mode 100644 index 000000000000..914fe2e5d030 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc @@ -0,0 +1,53 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: event trigger - test inter-event histogram trigger eprobe on synthetic event +# requires: dynamic_events synthetic_events events/syscalls/sys_enter_openat/hist "e[:[/]] . []":README + +echo 0 > events/enable + +clear_dynamic_events + +SYSTEM="syscalls" +START="sys_enter_openat" +END="sys_exit_openat" +FIELD="filename" +SYNTH="synth_open" +EPROBE="eprobe_open" + +echo "$SYNTH u64 filename; s64 ret;" > synthetic_events +echo "hist:keys=common_pid:__arg__1=$FIELD" > events/$SYSTEM/$START/trigger +echo "hist:keys=common_pid:filename=\$__arg__1,ret=ret:onmatch($SYSTEM.$START).trace($SYNTH,\$filename,\$ret)" > events/$SYSTEM/$END/trigger + +echo "e:$EPROBE synthetic/$SYNTH file=+0(\$filename):ustring ret=\$ret:s64" >> dynamic_events + +grep -q "$SYNTH" dynamic_events +grep -q "$EPROBE" dynamic_events +test -d events/synthetic/$SYNTH +test -d events/eprobes/$EPROBE + +echo 1 > events/eprobes/$EPROBE/enable +ls +echo 0 > events/eprobes/$EPROBE/enable + +content=`grep '^ *ls-' trace | grep 'file='` +nocontent=`grep '^ *ls-' trace | grep 'file=' | grep -v -e '"/' -e '"."'` || true + +if [ -z "$content" ]; then + exit_fail +fi + +if [ ! -z "$nocontent" ]; then + exit_fail +fi + +echo "-:$EPROBE" >> dynamic_events +echo '!'"hist:keys=common_pid:filename=\$__arg__1,ret=ret:onmatch($SYSTEM.$START).trace($SYNTH,\$filename,\$ret)" > events/$SYSTEM/$END/trigger +echo '!'"hist:keys=common_pid:__arg__1=$FIELD" > events/$SYSTEM/$START/trigger +echo '!'"$SYNTH u64 filename; s64 ret;" >> synthetic_events + +! grep -q "$SYNTH" dynamic_events +! grep -q "$EPROBE" dynamic_events +! test -d events/synthetic/$SYNTH +! test -d events/eprobes/$EPROBE + +clear_trace