At runtime, UST checks if the LTTng clock source is available

[ust.git] / libust / tracectl.c

diff --git a/libust/tracectl.c b/libust/tracectl.c
index b783c76e2ba8c87f0aa7280408c7c60236c885fe..4f016bb08215ae43844adf50f1c651d50716b489 100644 (file)
--- a/libust/tracectl.c
+++ b/libust/tracectl.c
@@ -39,6 +39,7 @@
 #include <ust/marker.h>
 #include <ust/tracepoint.h>
 #include <ust/tracectl.h>
+#include <ust/clock.h>
 #include "tracer.h"
 #include "usterr.h"
 #include "ustcomm.h"
@@ -1262,6 +1263,15 @@ static void __attribute__((constructor)) init()
 
        create_listener();
 
+       /* Get clock the clock source type */
+       struct timespec ts;
+       /* Default clock source */
+       ust_clock_source = CLOCK_TRACE;
+       if (clock_gettime(ust_clock_source, &ts) != 0) {
+               ust_clock_source = CLOCK_MONOTONIC;
+               DBG("UST traces will not be synchronized with LTTng traces");
+       }
+
        autoprobe_val = getenv("UST_AUTOPROBE");
        if (autoprobe_val) {
                struct marker_iter iter;