From nobody Thu Oct 2 21:49:07 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 304181B87E8; Thu, 11 Sep 2025 00:43:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757551437; cv=none; b=uNOeWUgT6iHSWdfngxiUdr1hZ0ZHNDO+eoPNULzomV+ooOKKhFYIZeRnu0gm7vYFVSsytkRXoLqePZyIW0Hf36CtGPq9G1pk5xvI9oR/i5uH6DE3pMGEqDbClntdU59FsXY0fFyBI1cckl8+b1EQjrBEjR6UWo5cw4gd1YFNt8U= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757551437; c=relaxed/simple; bh=m69jGOlntb9/ZRVib7FhJd3yxy+9Df6z1XbbJ40c8VI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=evSEzISB4B2N/e2GdrRzUJeSu+7TSwhVB3ZsG8Gzez6DHFbSHRSE3iaBkNcHmuQ2H7aNYmOUxOdqrWLQ0eV/XSGpBByoitSOGjbsl2GDnyt62Vodzc2qy5qd3r2/WckmEbMWpn7r7LM1ARp2hwi5yAquh8Lpftq9Lhx6Y4IjPTA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=vIW34KYT; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="vIW34KYT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2B39DC4CEEB; Thu, 11 Sep 2025 00:43:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757551437; bh=m69jGOlntb9/ZRVib7FhJd3yxy+9Df6z1XbbJ40c8VI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vIW34KYT06pHPAj2FOhAqv0Nx94bpHPOnJY6/xKIK4hQdPm9UA8oXeXYlOh5JPsyu T0/Ycqo0F7jyugKr2k0to8Cvcq7SxE/dQZjKnoCqHHb7fS43XCRXKviX1BLKNamUyP MtCbP06sGeIF9AcLZfcTEUcOD3uz0bLD/LNbhwhOH+2CtHIYIzo3YoIt1HzvC+djcI /eY1ZOtrvh8eia78hFTgXyeOqE4kQQfmwIXdO8s8w1bn2jETMuntrdatgmCUsb++dE qLFJ6AlX9CTCYNIKwIilBcYofgGo3Ptafzfq+S2jnoNnQnCsKuBWAe8k1Cks8Lf5qd nmscdJSMH26WQ== From: "Masami Hiramatsu (Google)" To: Steven Rostedt , Peter Zijlstra , Ingo Molnar , x86@kernel.org Cc: Jinchao Wang , Mathieu Desnoyers , Masami Hiramatsu , Thomas Gleixner , Borislav Petkov , Dave Hansen , "H . Peter Anvin" , Alexander Shishkin , Ian Rogers , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-perf-users@vger.kernel.org Subject: [PATCH v3 7/7] selftests: ftrace: Add wprobe trigger testcase Date: Thu, 11 Sep 2025 09:43:50 +0900 Message-ID: <175755143081.153203.6292299604126182907.stgit@devnote2> X-Mailer: git-send-email 2.43.0 In-Reply-To: <175755135002.153203.324836519360617091.stgit@devnote2> References: <175755135002.153203.324836519360617091.stgit@devnote2> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Masami Hiramatsu (Google) Add a testcase for checking wprobe trigger. This sets set_wprobe and clear_wprobe triggers on fprobe events to watch dentry access. So this depends on both wprobe and fprobe. Signed-off-by: Masami Hiramatsu (Google) --- Changes in v3: - Newly added. --- .../ftrace/test.d/trigger/trigger-wprobe.tc | 48 ++++++++++++++++= ++++ 1 file changed, 48 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-w= probe.tc diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-wprobe.t= c b/tools/testing/selftests/ftrace/test.d/trigger/trigger-wprobe.tc new file mode 100644 index 000000000000..a012f7b92405 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-wprobe.tc @@ -0,0 +1,48 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: event trigger - test wprobe trigger +# requires: dynamic_events "w[:[/][]] [r|w|rw]@[:= ]":README events/sched/sched_process_fork/trigger + +echo 0 > tracing_on + +:;: "Add a wprobe event used by trigger" ;: +echo 'w:watch rw@0:8 address=3D$addr value=3D+0($addr)' > dynamic_events + +:;: "Add events for triggering wprobe" ;: +echo 'f:truncate do_truncate dentry=3D$arg2' >> dynamic_events +echo 'f:dentry_kill __dentry_kill dentry=3D$arg1' >> dynamic_events + +:;: "Add wprobe triggers" ;: +echo 'set_wprobe:watch:dentry' >> events/fprobes/truncate/trigger +echo 'clear_wprobe:watch:dentry' >> events/fprobes/dentry_kill/trigger +cat events/fprobes/truncate/trigger | grep ^set_wprobe +cat events/fprobes/dentry_kill/trigger | grep ^clear_wprobe + +:;: "Ensure wprobe is still disabled" ;: +cat events/wprobes/watch/enable | grep 0 + +:;: "Enable events for triggers" ;: +echo 1 >> events/fprobes/truncate/enable +echo 1 >> events/fprobes/dentry_kill/enable + +:;: "Start test workload" ;: +echo 1 >> tracing_on + +echo aaa > /tmp/hoge +echo bbb > /tmp/hoge +echo ccc > /tmp/hoge +rm /tmp/hoge + +:;: "Check trace results" ;: +cat trace | grep watch + +:;: "Ensure wprobe becomes disabled again" ;: +cat events/wprobes/watch/enable | grep 0 + +:;: "Remove wprobe triggers" ;: +echo '!set_wprobe:watch:dentry' >> events/fprobes/truncate/trigger +echo '!clear_wprobe:watch' >> events/fprobes/dentry_kill/trigger +! grep ^set_wprobe events/fprobes/truncate/trigger +! grep ^clear_wprobe events/fprobes/dentry_kill/trigger + +exit 0 \ No newline at end of file