All of lore.kernel.org
 help / color / mirror / Atom feed
From: Song Chen <chensong_2000@189.cn>
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 <chensong_2000@189.cn>
Subject: [PATCH v5 1/3] kernel/trace: Introduce trace_probe_print_args and use it in *probes
Date: Fri, 30 Dec 2022 14:33:19 +0800	[thread overview]
Message-ID: <1672382000-18304-1-git-send-email-chensong_2000@189.cn> (raw)

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 <chensong_2000@189.cn>
---
 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');
-- 
2.25.1


             reply	other threads:[~2022-12-30  6:26 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-30  6:33 Song Chen [this message]
2023-01-03 13:30 ` [PATCH v5 1/3] kernel/trace: Introduce trace_probe_print_args and use it in *probes Masami Hiramatsu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1672382000-18304-1-git-send-email-chensong_2000@189.cn \
    --to=chensong_2000@189.cn \
    --cc=arnd@arndb.de \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-trace-kernel@vger.kernel.org \
    --cc=mhiramat@kernel.org \
    --cc=rostedt@goodmis.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.