--- old/src/share/vm/memory/virtualspace.hpp	2017-06-29 15:57:33.880287583 -0700
+++ new/src/share/vm/memory/virtualspace.hpp	2017-06-29 15:57:33.692280355 -0700
@@ -63,6 +63,7 @@
   // Accessors
   char*  base()            const { return _base;      }
   size_t size()            const { return _size;      }
+  char*  end()             const { return _base + _size; }
   size_t alignment()       const { return _alignment; }
   bool   special()         const { return _special;   }
   bool   executable()      const { return _executable;   }
@@ -85,6 +86,9 @@
   static size_t page_align_size_down(size_t size);
   static size_t allocation_align_size_up(size_t size);
   static size_t allocation_align_size_down(size_t size);
+  bool contains(const void* p) const {
+    return (base() <= ((char*)p)) && (((char*)p) < (base() + size()));
+  }
 };
 
 ReservedSpace