trace2: add trace2_child_ready() to report on background children

[thirdparty/git.git] / trace2 / tr2_tgt_event.c

diff --git a/trace2/tr2_tgt_event.c b/trace2/tr2_tgt_event.c
index 578a9a5287ab11bc31a4668e8e0d7d8d0e8c6e7d..70cfc2f77cc332e167ede6f94995ceacb0a72136 100644 (file)
--- a/trace2/tr2_tgt_event.c
+++ b/trace2/tr2_tgt_event.c
@@ -383,6 +383,27 @@ static void fn_child_exit_fl(const char *file, int line,
        jw_release(&jw);
 }
 
+static void fn_child_ready_fl(const char *file, int line,
+                             uint64_t us_elapsed_absolute, int cid, int pid,
+                             const char *ready, uint64_t us_elapsed_child)
+{
+       const char *event_name = "child_ready";
+       struct json_writer jw = JSON_WRITER_INIT;
+       double t_rel = (double)us_elapsed_child / 1000000.0;
+
+       jw_object_begin(&jw, 0);
+       event_fmt_prepare(event_name, file, line, NULL, &jw);
+       jw_object_intmax(&jw, "child_id", cid);
+       jw_object_intmax(&jw, "pid", pid);
+       jw_object_string(&jw, "ready", ready);
+       jw_object_double(&jw, "t_rel", 6, t_rel);
+       jw_end(&jw);
+
+       tr2_dst_write_line(&tr2dst_event, &jw.json);
+
+       jw_release(&jw);
+}
+
 static void fn_thread_start_fl(const char *file, int line,
                               uint64_t us_elapsed_absolute)
 {
@@ -610,6 +631,7 @@ struct tr2_tgt tr2_tgt_event = {
        fn_alias_fl,
        fn_child_start_fl,
        fn_child_exit_fl,
+       fn_child_ready_fl,
        fn_thread_start_fl,
        fn_thread_exit_fl,
        fn_exec_fl,