--- old/src/hotspot/share/gc/g1/g1PageBasedVirtualSpace.hpp	2020-01-03 17:56:50.884832639 +0800
+++ new/src/hotspot/share/gc/g1/g1PageBasedVirtualSpace.hpp	2020-01-03 17:56:50.887832746 +0800
@@ -136,6 +136,8 @@
 
   void commit_and_set_special();
 
+  bool is_special() const { return _special; }
+
   bool contains(const void* p) const;
 
   MemRegion reserved() {