From nobody Thu Oct 2 18:17:15 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 5365E2DC79E; Sun, 14 Sep 2025 14:11:08 +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=1757859069; cv=none; b=ketxIoZBFcdqCz5hlukHO4G4/niGKXF97c8aEbU1UijP4jQO1yeFuXa+Rt9Ryv1d54IkJXklxjF6+ZnTBAR4Yx1SL8Lqd0wSoVf2nYLipcCCPlvKgjXwzNPuCRnQuVCEIFw6Tm8VjTYupcgsWWVvTSoigHa/tFswcIl61FdaNnU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757859069; c=relaxed/simple; bh=m69jGOlntb9/ZRVib7FhJd3yxy+9Df6z1XbbJ40c8VI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=IoWwRCCQEr9jXVHfrrTPm4MF750D836Bbbi8Ej+Rm/DUWF6STY12XOS3763sf4OThYdo+cn3QfvhX3kU8x0k3preIYLlECwmIVUVBYTQ9ObLQvfDeM05ZJg0gN4g3sFEuna+ZjbR064QSJSaJgWCO1/MttSWYidmt7B0pDqbAHM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=diHKnLdt; 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="diHKnLdt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57760C4CEF0; Sun, 14 Sep 2025 14:11:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757859068; bh=m69jGOlntb9/ZRVib7FhJd3yxy+9Df6z1XbbJ40c8VI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=diHKnLdtPdYzNPDUbrrZw8v7p5946f9O7we6PoAzqBo+N033LxL6tW8KzS8S+qzjF JMAWMuhvuUqvLqqnCVTHQR9WLzt115QnuG1hd+rNsbcTjhfnJCw+svqtUM4uAFF+UG 3gimHHGfOCIUkZGj33soecqBB39mwXWbXXlJF3H4Gz6DvfkrMKvMubGXEGiYhuNj7m BGHyHJW/bU//ceHvI5Guf7ddMesOpCa/EJorZ1lZk6Ht51GLCjbKBtOzO93iw8GuwJ JF7jiaDaOy8BlRsZxIgHwKxQcemZDH+uuzu9cgyAXrfc5r22wAQPBMhbqIsCr1Xvsp 61m5Br666yKOQ== 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 v4 8/8] selftests: ftrace: Add wprobe trigger testcase Date: Sun, 14 Sep 2025 23:11:03 +0900 Message-ID: <175785906300.234168.2360997300021717365.stgit@devnote2> X-Mailer: git-send-email 2.43.0 In-Reply-To: <175785897434.234168.6798590787777427098.stgit@devnote2> References: <175785897434.234168.6798590787777427098.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