From patchwork Wed Dec 28 07:08:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Chen X-Patchwork-Id: 13082732 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8CFFFC46467 for ; Wed, 28 Dec 2022 07:01:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230243AbiL1HBL (ORCPT ); Wed, 28 Dec 2022 02:01:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232081AbiL1HAr (ORCPT ); Wed, 28 Dec 2022 02:00:47 -0500 Received: from 189.cn (ptr.189.cn [183.61.185.104]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 3102338F; Tue, 27 Dec 2022 23:00:45 -0800 (PST) HMM_SOURCE_IP: 10.64.8.41:60898.1416967110 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP Received: from clientip-123.150.8.42 (unknown [10.64.8.41]) by 189.cn (HERMES) with SMTP id 9B43F1002B3; Wed, 28 Dec 2022 15:00:41 +0800 (CST) Received: from ([123.150.8.42]) by gateway-153622-dep-79f476db8-8kzc7 with ESMTP id e2a796c87bf0415ca618d27dfe820380 for rostedt@goodmis.org; Wed, 28 Dec 2022 15:00:41 CST X-Transaction-ID: e2a796c87bf0415ca618d27dfe820380 X-Real-From: chensong_2000@189.cn X-Receive-IP: 123.150.8.42 X-MEDUSA-Status: 0 Sender: chensong_2000@189.cn From: Song Chen To: rostedt@goodmis.org, mhiramat@kernel.org, arnd@arndb.de Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Song Chen Subject: [PATCH v4 1/2] kernel/trace: Introduce trace_probe_print_args and use it in *probes Date: Wed, 28 Dec 2022 15:08:11 +0800 Message-Id: <1672211291-31439-1-git-send-email-chensong_2000@189.cn> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-trace-kernel@vger.kernel.org print_probe_args is currently inplemented in trace_probe_tmpl.h and included by *probes, as a result, each probe has an identical copy. This patch will move it to trace_probe.c as an new API, each probe calls it to print their args in trace file. Signed-off-by: Song Chen Acked-by: Masami Hiramatsu (Google) --- kernel/trace/trace_eprobe.c | 2 +- kernel/trace/trace_kprobe.c | 4 ++-- kernel/trace/trace_probe.c | 27 +++++++++++++++++++++++++++ kernel/trace/trace_probe.h | 2 ++ kernel/trace/trace_probe_tmpl.h | 28 ---------------------------- kernel/trace/trace_uprobe.c | 2 +- 6 files changed, 33 insertions(+), 32 deletions(-) diff --git a/kernel/trace/trace_eprobe.c b/kernel/trace/trace_eprobe.c index 5dd0617e5df6..bdb26eee7a0c 100644 --- a/kernel/trace/trace_eprobe.c +++ b/kernel/trace/trace_eprobe.c @@ -310,7 +310,7 @@ print_eprobe_event(struct trace_iterator *iter, int flags, trace_seq_putc(s, ')'); - if (print_probe_args(s, tp->args, tp->nr_args, + if (trace_probe_print_args(s, tp->args, tp->nr_args, (u8 *)&field[1], field) < 0) goto out; diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 5a75b039e586..a4ffa864dbb7 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1426,7 +1426,7 @@ print_kprobe_event(struct trace_iterator *iter, int flags, trace_seq_putc(s, ')'); - if (print_probe_args(s, tp->args, tp->nr_args, + if (trace_probe_print_args(s, tp->args, tp->nr_args, (u8 *)&field[1], field) < 0) goto out; @@ -1461,7 +1461,7 @@ print_kretprobe_event(struct trace_iterator *iter, int flags, trace_seq_putc(s, ')'); - if (print_probe_args(s, tp->args, tp->nr_args, + if (trace_probe_print_args(s, tp->args, tp->nr_args, (u8 *)&field[1], field) < 0) goto out; diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 36dff277de46..ae13b6b2d5da 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -1218,3 +1218,30 @@ int trace_probe_create(const char *raw_command, int (*createfn)(int, const char return ret; } + +int trace_probe_print_args(struct trace_seq *s, struct probe_arg *args, int nr_args, + u8 *data, void *field) +{ + void *p; + int i, j; + + for (i = 0; i < nr_args; i++) { + struct probe_arg *a = args + i; + + trace_seq_printf(s, " %s=", a->name); + if (likely(!a->count)) { + if (!a->type->print(s, data + a->offset, field)) + return -ENOMEM; + continue; + } + trace_seq_putc(s, '{'); + p = data + a->offset; + for (j = 0; j < a->count; j++) { + if (!a->type->print(s, p, field)) + return -ENOMEM; + trace_seq_putc(s, j == a->count - 1 ? '}' : ','); + p += a->type->size; + } + } + return 0; +} diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h index de38f1c03776..cfef198013af 100644 --- a/kernel/trace/trace_probe.h +++ b/kernel/trace/trace_probe.h @@ -343,6 +343,8 @@ int trace_probe_compare_arg_type(struct trace_probe *a, struct trace_probe *b); bool trace_probe_match_command_args(struct trace_probe *tp, int argc, const char **argv); int trace_probe_create(const char *raw_command, int (*createfn)(int, const char **)); +int trace_probe_print_args(struct trace_seq *s, struct probe_arg *args, int nr_args, + u8 *data, void *field); #define trace_probe_for_each_link(pos, tp) \ list_for_each_entry(pos, &(tp)->event->files, list) diff --git a/kernel/trace/trace_probe_tmpl.h b/kernel/trace/trace_probe_tmpl.h index b3bdb8ddb862..1b57420857e1 100644 --- a/kernel/trace/trace_probe_tmpl.h +++ b/kernel/trace/trace_probe_tmpl.h @@ -212,31 +212,3 @@ store_trace_args(void *data, struct trace_probe *tp, void *rec, } } } - -static inline int -print_probe_args(struct trace_seq *s, struct probe_arg *args, int nr_args, - u8 *data, void *field) -{ - void *p; - int i, j; - - for (i = 0; i < nr_args; i++) { - struct probe_arg *a = args + i; - - trace_seq_printf(s, " %s=", a->name); - if (likely(!a->count)) { - if (!a->type->print(s, data + a->offset, field)) - return -ENOMEM; - continue; - } - trace_seq_putc(s, '{'); - p = data + a->offset; - for (j = 0; j < a->count; j++) { - if (!a->type->print(s, p, field)) - return -ENOMEM; - trace_seq_putc(s, j == a->count - 1 ? '}' : ','); - p += a->type->size; - } - } - return 0; -} diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index fb58e86dd117..1ff8f87211a6 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -1041,7 +1041,7 @@ print_uprobe_event(struct trace_iterator *iter, int flags, struct trace_event *e data = DATAOF_TRACE_ENTRY(entry, false); } - if (print_probe_args(s, tu->tp.args, tu->tp.nr_args, data, entry) < 0) + if (trace_probe_print_args(s, tu->tp.args, tu->tp.nr_args, data, entry) < 0) goto out; trace_seq_putc(s, '\n');