From nobody Sat Feb 7 11:04:48 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 8685024A078; Wed, 28 Jan 2026 14:09:38 +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=1769609378; cv=none; b=cHuyA7zSFzXlaD3bRyLZKAYgTNzyEjn0ZPdnxeec2H0SdE1ou1Bn/QkluBrWPX8CMGrwW5idpSWzH/eBe5QIXWzX0+TcUHPPsvmPf2+vqbhLAM14IhXYzR7ip5nzeRTkZ75yxeMmrw7xMdOK8k/iMYZF9sLiXrhTmN1ja2BsVUY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769609378; c=relaxed/simple; bh=XkgXf+BmWb1gm42X0hFSsPY2QiN+40F9WNZpKmrmhe0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=b1rMGzQgqTRC3CghKVLQ4nM2aNpzWyCApImOzzWYDqn4DgbpOqw8VUaHGCWCBl4y/RkynQxLDzQPAVwdLGfWAGD9/90/uLMRVgNz4gjs4gGFXBQG+5Ji+HVUiL4ORKHFuk+5zVx0d9jY/JvVtty5mxN/ZwhERGZN6XtLLdJebCg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Aw7nGGC4; 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="Aw7nGGC4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E1704C4CEF1; Wed, 28 Jan 2026 14:09:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769609378; bh=XkgXf+BmWb1gm42X0hFSsPY2QiN+40F9WNZpKmrmhe0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Aw7nGGC4UNYoZWyQ4rHJ0MXmatEaqC7GyfGGFpfKE8wLg76B9QGK+vDmcJBpbKZ2x inKIHprlRK7XE3OeilW2BDXJN4d98FU+5BhvZRZUUt46YMV2pDBGOHiXcxcwvGfKnl dAEEjCSEIMXI1Wjj38ROLLJx9ML1pTZWTULYiyB7bZhdP0W8l6tlateYssFXE3Wm2e KaSvF9G9MfBETwXddybdfQvkvPshKMZmWkGKjuKCr7ZC6DiOX7Z1Kp/Xvdr4Oy3KU7 FcLtj6vw6k4UUrDiQurFhA033BztFgWAMcyjN5S/qrXvzXX7WTyBfqPLo4MM6M/Uvh DXyqUM0YrQyDw== 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 03/11] selftests: tracing: Add a basic testcase for wprobe Date: Wed, 28 Jan 2026 23:09:32 +0900 Message-ID: <176960937225.182525.10205736065393489911.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 'add_remove_wprobe.tc' testcase for testing wprobe event that tests adding and removing operations of the wprobe event. Link: https://lore.kernel.org/all/175859026716.374439.14852239332989324292.= stgit@devnote2/ Signed-off-by: Masami Hiramatsu (Google) --- tools/testing/selftests/ftrace/config | 1=20 .../ftrace/test.d/dynevent/add_remove_wprobe.tc | 68 ++++++++++++++++= ++++ 2 files changed, 69 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remo= ve_wprobe.tc diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftest= s/ftrace/config index 544de0db5f58..d2f503722020 100644 --- a/tools/testing/selftests/ftrace/config +++ b/tools/testing/selftests/ftrace/config @@ -27,3 +27,4 @@ CONFIG_STACK_TRACER=3Dy CONFIG_TRACER_SNAPSHOT=3Dy CONFIG_UPROBES=3Dy CONFIG_UPROBE_EVENTS=3Dy +CONFIG_WPROBE_EVENTS=3Dy diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_wpro= be.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_wprobe.tc new file mode 100644 index 000000000000..20774c7f69f8 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_wprobe.tc @@ -0,0 +1,68 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Generic dynamic event - add/remove wprobe events +# requires: dynamic_events "w[:[/][]] [r|w|rw]@[:= ]":README + +echo 0 > events/enable +echo > dynamic_events + +# Use jiffies as a variable that is frequently written to. +TARGET=3Djiffies + +echo "w:my_wprobe w@$TARGET" >> dynamic_events + +grep -q my_wprobe dynamic_events +if [ $? -ne 0 ]; then + echo "Failed to create wprobe event" + exit_fail +fi + +test -d events/wprobes/my_wprobe +if [ $? -ne 0 ]; then + echo "Failed to create wprobe event directory" + exit_fail +fi + +echo 1 > events/wprobes/my_wprobe/enable + +# Check if the event is enabled +cat events/wprobes/my_wprobe/enable | grep -q 1 +if [ $? -ne 0 ]; then + echo "Failed to enable wprobe event" + exit_fail +fi + +# Let some time pass to trigger the breakpoint +sleep 1 + +# Check if we got any trace output +if !grep -q my_wprobe trace; then + echo "wprobe event was not triggered" +fi + +echo 0 > events/wprobes/my_wprobe/enable + +# Check if the event is disabled +cat events/wprobes/my_wprobe/enable | grep -q 0 +if [ $? -ne 0 ]; then + echo "Failed to disable wprobe event" + exit_fail +fi + +echo "-:my_wprobe" >> dynamic_events + +! grep -q my_wprobe dynamic_events +if [ $? -ne 0 ]; then + echo "Failed to remove wprobe event" + exit_fail +fi + +! test -d events/wprobes/my_wprobe +if [ $? -ne 0 ]; then + echo "Failed to remove wprobe event directory" + exit_fail +fi + +clear_trace + +exit 0