perf: Convert perf tracing data into a tracing_data event

[mirror_ubuntu-bionic-kernel.git] / tools / perf / util / trace-event-info.c

diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index 5ea8973ad331d48e1d4d9e9c94cc65d27a816599..30cd9b57595301ed3793f84f96b6ce6b279c8a40 100644 (file)
--- a/tools/perf/util/trace-event-info.c
+++ b/tools/perf/util/trace-event-info.c
@@ -154,10 +154,17 @@ static void put_tracing_file(char *file)
        free(file);
 }
 
+static ssize_t calc_data_size;
+
 static ssize_t write_or_die(const void *buf, size_t len)
 {
        int ret;
 
+       if (calc_data_size) {
+               calc_data_size += len;
+               return len;
+       }
+
        ret = write(output_fd, buf, len);
        if (ret < 0)
                die("writing to '%s'", output_file);
@@ -526,3 +533,20 @@ int read_tracing_data(int fd, struct perf_event_attr *pattrs, int nb_events)
 
        return 0;
 }
+
+ssize_t read_tracing_data_size(int fd, struct perf_event_attr *pattrs,
+                              int nb_events)
+{
+       ssize_t size;
+       int err = 0;
+
+       calc_data_size = 1;
+       err = read_tracing_data(fd, pattrs, nb_events);
+       size = calc_data_size - 1;
+       calc_data_size = 0;
+
+       if (err < 0)
+               return err;
+
+       return size;
+}