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 969673EB0FB; Tue, 22 Sep 2026 04:26:25 +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=1790051187; cv=none; b=hQ2I6xfDidzGtS1hMDqEPn3xPA+j3WKbH9PuV4ppwD+eWitUa3r97SLOi6YEVV5prISnnag12kY1Ls+dHeFjgL0hCHP7dzD/itZYpugpnlSoWGaQNy9eBbPPEpDvEWv27lyNWbLsoa4ivP1FBrITtOdmsJ6TYF2wwEg6ujJB3Xs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790051187; c=relaxed/simple; bh=bjSx1jVjckK9liIZZkUj2MwoFMgx8zJqitZsCqi9xdY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=DEjz1D40Me1aLcmaattfsi7Tr7Z9im7gGzBDC95G35pZ1V5ISCyCHxOS4bnwALUke2xeurj2Hq9lvUqYVjSjQoTIQKoi2p61hzKqtYtENT4dtxbsiseZ5D+PKNLpOvzVOGZH7o6m/RQNRBR1J4yGv3p//UwY1mx8yErk7GuITcU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=b7a5xTOi; 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="b7a5xTOi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1B9D1F00893; Tue, 22 Sep 2026 04:26:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790051185; bh=WneT79VUrBBDprz0zU1MRNHOGHbJ8XBndDJPjozOKt8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=b7a5xTOiRm27C/0oZkG2kyL8Px/zKMHPtQhHP4RQALCKlCpADwkFDBzCYtiKzwIOH 2T0ICsCciRISCy1pFqSg1KsziFg5UXxU1sgL6G1jiM6C7ZXKa2LWY1pBHgsKv8S8Sh QlXV7a7rUm56eV1Bf+Hs5c1TBdR4VHyrv1qQU9E/vwFGHuYdLmfkH+1kpFA1MB6NYg Z3PsKxggBVCJ35/pOVVK2jnRBxiK/tnJNR5RWXlQfZ6QP4ywF9qRyEqQb81uFObs75 Go6G7tgb8q9HIZPiZATGS+jPz/jUyTSTa6DAhWzarjm8PEQcMlhjMr/6Me9GJYpDNq fU+tcLlyVYZRA== From: "Masami Hiramatsu (Google)" To: Steven Rostedt , Peter Zijlstra , Ingo Molnar , Sean Christopherson 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, x86@kernel.org, Paolo Bonzini , kvm@vger.kernel.org Subject: [PATCH v17 08/13] selftests: tracing: Add a basic testcase for wprobe Date: Tue, 22 Sep 2026 13:26:19 +0900 Message-ID: <179005117931.388919.6236117656921986202.stgit@devnote2> X-Mailer: git-send-email 2.43.0 In-Reply-To: <179005108298.388919.4535333252892590932.stgit@devnote2> References: <179005108298.388919.4535333252892590932.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 '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 v17: - Catch failures when enabling wprobe and call exit_unresolved in case hardware watchpoints are exhausted. 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 | 66 ++++++++++++++++++++ 2 files changed, 67 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..3c622fb07e7f --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_wprobe.tc @@ -0,0 +1,66 @@ +#!/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 + +if ! echo 1 > events/wprobes/my_wprobe/enable; then + echo "Failed to enable wprobe (hardware watchpoints may be exhausted)" + exit_unresolved +fi + +# 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