2 files changed, 16 insertions, 0 deletions
diff --git a/trace/ftrace.c b/trace/ftrace.c
index 9749543d9b..6875faedb9 100644
--- a/trace/ftrace.c
+++ b/trace/ftrace.c
@@ -38,6 +38,21 @@ static int find_mount(char *mount_point, const char *fstype)
     return ret;
 }
 
+void ftrace_write(const char *fmt, ...)
+{
+    char ftrace_buf[MAX_TRACE_STRLEN];
+    int unused __attribute__ ((unused));
+    int trlen;
+    va_list ap;
+
+    va_start(ap, fmt);
+    trlen = vsnprintf(ftrace_buf, MAX_TRACE_STRLEN, fmt, ap);
+    va_end(ap);
+
+    trlen = MIN(trlen, MAX_TRACE_STRLEN - 1);
+    unused = write(trace_marker_fd, ftrace_buf, trlen);
+}
+
 bool ftrace_init(void)
 {
     char mount_point[PATH_MAX];
diff --git a/trace/ftrace.h b/trace/ftrace.h
index cb5e35d217..16c122816d 100644
--- a/trace/ftrace.h
+++ b/trace/ftrace.h
@@ -8,5 +8,6 @@
 extern int trace_marker_fd;
 
 bool ftrace_init(void);
+G_GNUC_PRINTF(1, 2) void ftrace_write(const char *fmt, ...);
 
 #endif /* TRACE_FTRACE_H */