[PATCH v3 05/11] trace-cmd library: Create tracecmd_debug() for debug printing

[Steven Rostedt <rostedt@goodmis.org>]

From: "Steven Rostedt (Google)" <rostedt@goodmis.org>

Move the dprint() of trace-msg.c into trace-utils.c and export it such
that other applications could use it as well. It is now renamed to
tracecmd_debug().

Link: https://lore.kernel.org/linux-trace-devel/20220417184538.1044417-6-rostedt@goodmis.org

Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 lib/trace-cmd/include/private/trace-cmd-private.h |  3 +++
 lib/trace-cmd/trace-msg.c                         | 12 +-----------
 lib/trace-cmd/trace-util.c                        | 12 ++++++++++++
 3 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h
index 6e7b346cda07..766e0a762c2b 100644
--- a/lib/trace-cmd/include/private/trace-cmd-private.h
+++ b/lib/trace-cmd/include/private/trace-cmd-private.h
@@ -43,6 +43,9 @@ enum {
 	RINGBUF_TYPE_TIME_STAMP		= 31,
 };
 
+/* Can be overridden */
+void tracecmd_debug(const char *fmt, ...);
+
 void tracecmd_record_ref(struct tep_record *record);
 
 void tracecmd_set_debug(bool set_debug);
diff --git a/lib/trace-cmd/trace-msg.c b/lib/trace-cmd/trace-msg.c
index 6cf74f9b1c99..39465ade8ab3 100644
--- a/lib/trace-cmd/trace-msg.c
+++ b/lib/trace-cmd/trace-msg.c
@@ -31,17 +31,7 @@
 typedef __u32 u32;
 typedef __be32 be32;
 
-static inline void dprint(const char *fmt, ...)
-{
-	va_list ap;
-
-	if (!tracecmd_get_debug())
-		return;
-
-	va_start(ap, fmt);
-	vprintf(fmt, ap);
-	va_end(ap);
-}
+#define dprint(fmt, ...)	tracecmd_debug(fmt, ##__VA_ARGS__)
 
 /* Two (4k) pages is the max transfer for now */
 #define MSG_MAX_LEN			8192
diff --git a/lib/trace-cmd/trace-util.c b/lib/trace-cmd/trace-util.c
index b5a0a1a601d4..9564c81a5c99 100644
--- a/lib/trace-cmd/trace-util.c
+++ b/lib/trace-cmd/trace-util.c
@@ -415,6 +415,18 @@ void __weak tracecmd_critical(const char *fmt, ...)
 	}
 }
 
+void __weak tracecmd_debug(const char *fmt, ...)
+{
+	va_list ap;
+
+	if (!tracecmd_get_debug())
+		return;
+
+	va_start(ap, fmt);
+	vprintf(fmt, ap);
+	va_end(ap);
+}
+
 #define LOG_BUF_SIZE 1024
 static void __plog(const char *prefix, const char *fmt, va_list ap, FILE *fp)
 {
-- 
2.35.1