1 files changed, 18 insertions, 0 deletions
diff --git a/WebKit/android/TimeCounter.h b/WebKit/android/TimeCounter.h
index c78d10f..29c3eb9 100644
--- a/WebKit/android/TimeCounter.h
+++ b/WebKit/android/TimeCounter.h
@@ -28,6 +28,7 @@
 
 #ifdef ANDROID_INSTRUMENT
 
+#include "hardware_legacy/qemu_tracing.h"
 #include <wtf/CurrentTime.h>
 
 namespace WebCore {
@@ -95,6 +96,23 @@ private:
     uint32_t m_startTime;
 };
 
+class QemuTracerAuto {
+public:
+    QemuTracerAuto() {
+        if (!reentry_count)
+            qemu_start_tracing();
+        reentry_count++;
+    }
+
+    ~QemuTracerAuto() {
+        reentry_count--;
+        if (!reentry_count)
+            qemu_stop_tracing();
+    }
+private:
+    static int reentry_count;
+};
+
 }
 #endif