--- old/src/share/vm/runtime/perfMemory.hpp	2016-04-13 22:17:37.031550477 +0900
+++ new/src/share/vm/runtime/perfMemory.hpp	2016-04-13 22:17:36.897549553 +0900
@@ -119,6 +119,16 @@
     static char*  _top;
     static size_t _capacity;
     static PerfDataPrologue*  _prologue;
+
+    /* These _saved_* fields are for JSnap.
+     * JSnap uses these values to show PerfDataEntry.
+     */
+    static char*  _saved_start;
+    static char*  _saved_end;
+    static char*  _saved_top;
+    static size_t _saved_capacity;
+    static PerfDataPrologue*  _saved_prologue;
+
     static jint   _initialized;
 
     static void create_memory_region(size_t sizep);