--- old/src/share/vm/prims/whitebox.cpp	2015-02-03 11:18:18.379426666 +0100
+++ new/src/share/vm/prims/whitebox.cpp	2015-02-03 11:18:18.308424616 +0100
@@ -89,6 +89,10 @@
   return os::vm_page_size();
 WB_END
 
+WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
+  return os::large_page_size();
+WB_END
+
 class WBIsKlassAliveClosure : public KlassClosure {
     Symbol* _name;
     bool _found;
@@ -1222,6 +1226,7 @@
   {CC"isObjectInOldGen",   CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
   {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
   {CC"getVMPageSize",      CC"()I",                   (void*)&WB_GetVMPageSize     },
+  {CC"getVMLargePageSize", CC"()J",                   (void*)&WB_GetVMLargePageSize},
   {CC"isClassAlive0",      CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
   {CC"parseCommandLine",
       CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",