--- old/src/share/vm/jfr/utilities/jfrTypes.hpp	2020-08-13 14:44:03.688191961 +0100
+++ new/src/share/vm/jfr/utilities/jfrTypes.hpp	2020-08-13 14:44:03.561190644 +0100
@@ -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,