diff -r 1e95931e7d8f -r 49102ba8cf14 src/hotspot/share/jfr/support/jfrThreadLocal.hpp
--- a/src/hotspot/share/jfr/support/jfrThreadLocal.hpp	Wed Jul 03 11:43:01 2019 +0800
+++ b/src/hotspot/share/jfr/support/jfrThreadLocal.hpp	Wed Jul 03 11:34:46 2019 +0200
@@ -113,9 +113,7 @@
     _stackframes = frames;
   }
 
-  u4 stackdepth() const {
-    return _stackdepth;
-  }
+  u4 stackdepth() const;
 
   void set_stackdepth(u4 depth) {
     _stackdepth = depth;