From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 44578265621; Wed, 15 Jul 2026 01:46:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784079962; cv=none; b=q/JqeYGUzFz8GdaoX0ZApN70K/u0DhI0fYicLTXWAiOGBZL9JMigPwBJwMxau5dr6Vp1Rzph1I7tLJrmj0jC3zybQ5Z9JnKR/e1PlQjSJoBGrD2yPY7SUGvvHNbzgaEJVXKpJ3fc+rjL447UF2yOYGBA0QG0lA9/cKvchRKOIfE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784079962; c=relaxed/simple; bh=rVJjGKr3S17TbNUAdbL+4V5+FKj6xNfm6cz6+ooptS8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Ff64+Bbcxt/k/eOqTi5ZP7009Uy+sS26971BBLQFtFFTG9l9SXW5PXBV45nrR17zLFvIkPN4LHUuRqfTon6e6O8dhvxFkfEeTENI640L5KOahB+rdsJ8FH6XftIQd6kaz/Zz5NFlNOVidb3K9huwnF+cOMwqTKeyHBE4ExR3Bt4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cmwpOsy4; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="cmwpOsy4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C54D1F000E9; Wed, 15 Jul 2026 01:45:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784079961; bh=O7i/gpCoexgVrVsCcRbivjoHnZ4LRYbdacut/L4Lst4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=cmwpOsy44aG3Yj3AQwXEKwkYlCzcvBxaWAAnWnkKWhDpMpWLfKZG1OE/PBUMcNgGS /AzaPSPmdgls84UvQvv6P260IGZZkS6j6m3vuhzB8Pggv6juQwdgU8iwxQfaDwL+uP Y90yZ8v1NtYwYuU2RhFE0ImJ6HylpEjT8V9cgPaF/cT4oHAwWStPUdqNiKlFJV3paW 98Dk5iQq7vjbLMF6B3RVRWrgTXXHnvubaiyPIica7/1HR3sHPK3HHOrEDBf4+/JvSC lfozewtPkfvVh2cTvWxAdzG6zn7zTCcDhEsZWSUsPYl5iCWvPbzHDd8U5ymkeZ7trw YddTrXQMaQkYg== 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 v7 10/10] selftests: ftrace: Add wprobe trigger testcase Date: Wed, 15 Jul 2026 10:45:55 +0900 Message-ID: <178407995495.95826.11582585035165074036.stgit@devnote2> X-Mailer: git-send-email 2.43.0 In-Reply-To: <178407983818.95826.12714571928538799781.stgit@devnote2> References: <178407983818.95826.12714571928538799781.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: 8bit 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 v7: - Add a newline at the end of file.(style fix) - Use dentry_kill instead of __dentry_kill. Changes in v5: - Enable CONFIG_WPROBE_TRIGGERS in the config for ftrace test. Changes in v3: - Newly added. --- tools/testing/selftests/ftrace/config | 1 .../ftrace/test.d/trigger/trigger-wprobe.tc | 48 ++++++++++++++++++++ 2 files changed, 49 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-wprobe.tc diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/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=y CONFIG_UPROBES=y CONFIG_UPROBE_EVENTS=y CONFIG_WPROBE_EVENTS=y +CONFIG_WPROBE_TRIGGERS=y diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-wprobe.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-wprobe.tc new file mode 100644 index 000000000000..cc7a0532d7ff --- /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=$addr value=+0($addr)' > dynamic_events + +:;: "Add events for triggering wprobe" ;: +echo 'f:truncate do_truncate dentry=$arg2' >> dynamic_events +echo 'f:dentry_kill dentry_kill dentry=$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