From mboxrd@z Thu Jan 1 00:00:00 1970 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 00F3146B5 for ; Mon, 16 Jan 2023 16:22:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B502C433D2; Mon, 16 Jan 2023 16:22:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673886166; bh=hAGJjBj+YllbPWUwtRRBsl9ezoiQq/SEtOdA5WI/l18=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=x8vysd92UIsSxuVG8OY0JN6JUdM5sDK0f/PSpX3D8ODrXRf/b64BMJYvfy8IdfbvE WyW6Z9w1Ph089tkZrzq1/LFIjOOQZd2VCGdPqzyTusb2EZiQhKt0Nts/g5PflxbQQs ysKrydREQwKVup0gmLL0Ri2nenMajFCS3AqYeby0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Adrian Hunter , Jiri Olsa , Namhyung Kim , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 5.4 328/658] perf trace: Allow associating scnprintf routines with well known arg names Date: Mon, 16 Jan 2023 16:46:56 +0100 Message-Id: <20230116154924.558372844@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154909.645460653@linuxfoundation.org> References: <20230116154909.645460653@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Arnaldo Carvalho de Melo [ Upstream commit 5d88099bc00dccddf5da18e25e1223f01644f7a2 ] For instance 'msr' appears in several tracepoints, so we can associate it with a single scnprintf() routine auto-generated from kernel headers, as will be done in followup patches. Start with an empty array of associations. Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Link: https://lkml.kernel.org/n/tip-89ptht6s5fez82lykuwq1eyb@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo Stable-dep-of: 03e9a5d8eb55 ("perf trace: Handle failure when trace point folder is missed") Signed-off-by: Sasha Levin --- tools/perf/builtin-trace.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index e01952883cbc..02cf39970ed0 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1455,6 +1455,27 @@ static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) return 0; } +static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = { +}; + +static int syscall_arg_fmt__cmp(const void *name, const void *fmtp) +{ + const struct syscall_arg_fmt *fmt = fmtp; + return strcmp(name, fmt->name); +} + +static struct syscall_arg_fmt * +__syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name) +{ + return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp); +} + +static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name) +{ + const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name); + return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name); +} + static struct tep_format_field * syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field) { @@ -1491,6 +1512,11 @@ syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field * 7 unsigned long */ arg->scnprintf = SCA_FD; + } else { + struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name); + + if (fmt) + arg->scnprintf = fmt->scnprintf; } } -- 2.35.1