From nobody Sat Feb 7 09:47:57 2026 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 AD26823BCF7; Wed, 28 Jan 2026 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=1769609468; cv=none; b=HEOjLsmrGC4vFuruEhI/raFZ8uWKYHkf/uFeDIpHzg7AXKZ6jeiNpEJJWazqC08qP5tqWAZRkJgB1oIwshb/sVpAtSAq28fn9owF+WMHCiwxK9uooKQWyH7HHNOzxeiHBzs5A1JZHPyh6MKwwnqVW67jwcQ5Ir5LriF92DuDIbw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769609468; c=relaxed/simple; bh=yWrgfH6o6tBojpygb/3hwUZPMazgwgCEKyJzb90YtAg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=cJFhilBS0w8OZUiFM21+TJ/molS3xcVxedytVp/FtFNEdOcijFl1V8ac03+RDqyRR6x8inesTkYRomfXEVgoE2WcZg8mG7W7Ee/tMP9I5x7EMx4uQFfbUFUiRHTBs8yk6HRXNWoq3mjXLDfP/9OlUVABOeaRdPwGyB1VaIlG34w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Do9ekvyP; 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="Do9ekvyP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AEDA2C4CEF1; Wed, 28 Jan 2026 14:11:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769609468; bh=yWrgfH6o6tBojpygb/3hwUZPMazgwgCEKyJzb90YtAg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Do9ekvyPPRR+MUe8JFC7mtz4WDI25l3g4kCbWKpqWUTxN1BN1l6tGaoNfnJnddSHQ nVoREhI0BQvBJDNo9y8GVTtIouS9Bc/M/M8b1/zhqn+4+1HWj67MirSljh/Fizk4y5 xU0fukBPOVxK8Kje/Yb2q6MliloylkKMf4ndeXu+m2JXMfrcwRiLuhcVQjskXNJqkF ILfkK0zNTvREJVMZFx3WosFcSUOAOJ042vrL4uBaZfc9/2FMyxBLsTxXAiANqmCjzN XHXs5oeKYQoUymM3BDusLWmdMwaB1wiaz6bnFgMretADIfW2pxU2XFrp+Pvy9MjFcj snNBDQqkz5tvg== 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 v6 11/11] selftests: ftrace: Add wprobe trigger testcase Date: Wed, 28 Jan 2026 23:11:02 +0900 Message-ID: <176960946223.182525.2450061066358568551.stgit@devnote2> X-Mailer: git-send-email 2.43.0 In-Reply-To: <176960933881.182525.11984731584313026309.stgit@devnote2> References: <176960933881.182525.11984731584313026309.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 v5: - Enable CONFIG_WPROBE_TRIGGERS in the config for ftrace test. Changes in v3: - Newly added. --- tools/testing/selftests/ftrace/config | 1=20 .../ftrace/test.d/trigger/trigger-wprobe.tc | 48 ++++++++++++++++= ++++ 2 files changed, 49 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-w= probe.tc diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftest= s/ftrace/config index d2f503722020..ecdee77f360f 100644 --- a/tools/testing/selftests/ftrace/config +++ b/tools/testing/selftests/ftrace/config @@ -28,3 +28,4 @@ CONFIG_TRACER_SNAPSHOT=3Dy CONFIG_UPROBES=3Dy CONFIG_UPROBE_EVENTS=3Dy CONFIG_WPROBE_EVENTS=3Dy +CONFIG_WPROBE_TRIGGERS=3Dy 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