--- old/src/hotspot/share/jfr/utilities/jfrTypes.hpp	2019-04-24 10:49:02.393942025 +0900
+++ new/src/hotspot/share/jfr/utilities/jfrTypes.hpp	2019-04-24 10:49:02.124944749 +0900
@@ -33,6 +33,9 @@
 typedef int fio_fd;
 const int invalid_fd = -1;
 const jlong invalid_offset = -1;
+const u4 STACK_DEPTH_DEFAULT = 64;
+const u4 MIN_STACK_DEPTH = 1;
+const u4 MAX_STACK_DEPTH = 2048;
 
 enum EventStartTime {
   UNTIMED,