From patchwork Wed Feb 26 06:19:43 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Masami Hiramatsu (Google)" X-Patchwork-Id: 13991565 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 24D8A25D537; Wed, 26 Feb 2025 06:19:46 +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=1740550787; cv=none; b=n9T5lQOt9NhS6lONrW2CJwA0KhUuO2SKmYiEg8XqIAbhaUGrRbGtk3BqXXDp/ECE1goO09zQYAaUyRbg8gT9snrFj/9+qn7w2XMAv8HPfVYzq9UQjtFGof1YaOjaDD3TLsQkXIy84E+u/un98mi2wOzg7rbudBV6tiKDFn7KDGo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740550787; c=relaxed/simple; bh=CDnh/F6yJJZro6R0MIKigGgnvX9Ri5GL0GCDeg3C3l8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ILD0zelmcq7bSg8dDpfw2bIGeu+eGDLePsacUUljTRnC7dYPFRi5+8EwhvsfiRsrduinxJNgOPchshyJOlC0HPJFjUZ6zHIUl1TLR5CpGcVZetMf9dL3O4YdTEiEsP7H/H9g2fnzd9tXZQlNrbafnaIRqQiGZ5APcIT/LsMggCg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Wfd2uNRO; 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="Wfd2uNRO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D828C4CEE2; Wed, 26 Feb 2025 06:19:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1740550786; bh=CDnh/F6yJJZro6R0MIKigGgnvX9Ri5GL0GCDeg3C3l8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wfd2uNROPQwZgTHXi+QlKkAae7QnvEoW1s0Clv3rWUBZvFJW/kUG+YaI4Qwd50rl0 9zZvTyEIh3mImIeqGTbfhyE4NfIPh8SJWO84W/Ki9ToargIrI1IeBF+F1QWKyw5tMR xcSikvVaV2blHkItD9JNF+zBTfYNtAh/cdeqi6XsUZahm2TKqoVi5rIaLp4xLaU5zC QhpGptj++qMBQfbqJy5+5pJ+cwCatN8o315HVstCxIdpzjm8Y2hwIeXlVl3KBgui3C VkghvqTzO/8uokKTP50+9Rs5ah1nejHhfFFQqSclhxFEZtsSkjNOQmRGvVOzzQkgi0 eKzWcVnz39DtQ== From: "Masami Hiramatsu (Google)" To: Steven Rostedt , Shuah Khan Cc: Masami Hiramatsu , Mathieu Desnoyers , Hari Bathini , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH 8/8] selftests/ftrace: Add dynamic events argument limitation test case Date: Wed, 26 Feb 2025 15:19:43 +0900 Message-ID: <174055078295.4079315.14702008939511417359.stgit@mhiramat.tok.corp.google.com> X-Mailer: git-send-email 2.48.1.658.g4767266eb4-goog In-Reply-To: <174055071644.4079315.12468865615828925878.stgit@mhiramat.tok.corp.google.com> References: <174055071644.4079315.12468865615828925878.stgit@mhiramat.tok.corp.google.com> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Masami Hiramatsu (Google) Add argument limitation test case for dynamic events. This is a boudary check for the maximum number of the probe event arguments. Signed-off-by: Masami Hiramatsu (Google) --- .../ftrace/test.d/dynevent/dynevent_limitations.tc | 42 ++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/dynevent_limitations.tc diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/dynevent_limitations.tc b/tools/testing/selftests/ftrace/test.d/dynevent/dynevent_limitations.tc new file mode 100644 index 000000000000..6b94b678741a --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/dynevent/dynevent_limitations.tc @@ -0,0 +1,42 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Checking dynamic events limitations +# requires: dynamic_events "imm-value":README + +# Max arguments limitation +MAX_ARGS=128 +EXCEED_ARGS=$((MAX_ARGS + 1)) + +check_max_args() { # event_header + TEST_STRING=$1 + # Acceptable + for i in `seq 1 $MAX_ARGS`; do + TEST_STRING="$TEST_STRING \\$i" + done + echo "$TEST_STRING" >> dynamic_events + echo > dynamic_events + # Error + TEST_STRING="$TEST_STRING \\$EXCEED_ARGS" + ! echo "$TEST_STRING" >> dynamic_events + return 0 +} + +# Kprobe max args limitation +if grep -q "kprobe_events" README; then + check_max_args "p vfs_read" +fi + +# Fprobe max args limitation +if grep -q "f[:[/][]] [%return] []" README; then + check_max_args "f vfs_read" +fi + +# Tprobe max args limitation +if grep -q "t[:[/][]] []" README; then + check_max_args "t kfree" +fi + +# Uprobe max args limitation +if grep -q "uprobe_events" README; then + check_max_args "p /bin/sh:10" +fi