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 504E63EF0BD; Mon, 7 Sep 2026 03:47:43 +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=1788752864; cv=none; b=jyMQa1MnX+PXoSVOpWVkDwNeMaU1oIltdCG/gpPtYaZfx3WAc9EjkEUQWOBvhQtmwEOvfEYcIFEO/RWACwQ4vVGN93nJR2xubQAyABOEYcwSx8wxOwDyDfCWMv/eD483UOyc1aycBQrIxcZHJV2ZRuiVk7fVJHwsA4oT/OJodkw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788752864; c=relaxed/simple; bh=7WwAsjXAm72C3N+aWoYKuzBUFcwI27R/LA/82emnZ6M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=jW/Ep2bsAJA3aewLvNcQxkEiKLc6kvjVXXjM3GSxMV4iKyWLhuK5fso5AmPCqdhsFsIBrfGAQHrBAtfGlNwbWcXXm3GJF3GDkcNp0/B2DaPAQ5FOzPw8+50+RUhwak0ZqXM722gMtEPcnnQdil9009BlYx7356qN7lJA4I0wfvI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=n6BKsBis; 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="n6BKsBis" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 869781F00A3A; Mon, 7 Sep 2026 03:47:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788752863; bh=lcnl1Kiyu2/Ws5GS/yrGcGPFrteWWVQg5IT2n1yE1q0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=n6BKsBisbhdDWolCiv5TCiUdnRYIzFvalc+0u986T4NmKRJ5iddgpUeLCMTsoqXTx wg2s3CsO+5FI19KdLYIWW/B4lstUsX3SbpEawIJV/QKg4yHUbp5Lz8rjmj0sBD5D4P tKHfSGSkRjd4qnGAzhs1JTc3/pvUJv5pDlHLrmxxvE2VTYgsu8KSRRQa1aTgHPvZMO DFqEr8VkQFGCSaoIFmDKIQMkABT21isEJT0hNVX6vtLIG0kF20V3qGa63ZETUGm9Lf trbVuRYhuRnxZNe8GqDUk3ZQ983UUvjUpYh8Dd2wCXP1CDsmbpL/LoumqRerm1RslS YZ1fasdm2yQsw== 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 v15 07/12] selftests: tracing: Add a basic testcase for wprobe Date: Mon, 7 Sep 2026 12:47:37 +0900 Message-ID: <178875285732.93794.2953704844412327111.stgit@devnote2> X-Mailer: git-send-email 2.43.0 In-Reply-To: <178875277830.93794.14247844688761142429.stgit@devnote2> References: <178875277830.93794.14247844688761142429.stgit@devnote2> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-perf-users@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 'add_remove_wprobe.tc' testcase for testing wprobe event that tests adding and removing operations of the wprobe event. Signed-off-by: Masami Hiramatsu (Google) --- Changes in v9: - Fix command check logic to prevent early exit under 'set -e' (errexit) when grep or test fails. - Simplify enable/disable status checks by removing cat pipes. Changes in v8: - Fixed silently test failure path. --- tools/testing/selftests/ftrace/config | 1 .../ftrace/test.d/dynevent/add_remove_wprobe.tc | 63 ++++++++++++++++++++ 2 files changed, 64 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_wprobe.tc diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/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=y CONFIG_TRACER_SNAPSHOT=y CONFIG_UPROBES=y CONFIG_UPROBE_EVENTS=y +CONFIG_WPROBE_EVENTS=y diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_wprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_wprobe.tc new file mode 100644 index 000000000000..647c37d5e4c8 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_wprobe.tc @@ -0,0 +1,63 @@ +#!/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=jiffies + +echo "w:my_wprobe w@$TARGET" >> dynamic_events + +if ! grep -q my_wprobe dynamic_events; then + echo "Failed to create wprobe event" + exit_fail +fi + +if [ ! -d events/wprobes/my_wprobe ]; then + echo "Failed to create wprobe event directory" + exit_fail +fi + +echo 1 > events/wprobes/my_wprobe/enable + +# Check if the event is enabled +if ! grep -q 1 events/wprobes/my_wprobe/enable; 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" + exit_fail +fi + +echo 0 > events/wprobes/my_wprobe/enable + +# Check if the event is disabled +if ! grep -q 0 events/wprobes/my_wprobe/enable; then + echo "Failed to disable wprobe event" + exit_fail +fi + +echo "-:my_wprobe" >> dynamic_events + +if grep -q my_wprobe dynamic_events; then + echo "Failed to remove wprobe event" + exit_fail +fi + +if [ -d events/wprobes/my_wprobe ]; then + echo "Failed to remove wprobe event directory" + exit_fail +fi + +clear_trace + +exit 0