--- a/hotspot/src/share/vm/prims/whitebox.cpp	Mon Jul 07 10:18:33 2014 +0200
+++ b/hotspot/src/share/vm/prims/whitebox.cpp	Mon Jul 07 10:12:40 2014 +0200
@@ -24,6 +24,7 @@
 
 #include "precompiled.hpp"
 
+#include "memory/metadataFactory.hpp"
 #include "memory/universe.hpp"
 #include "oops/oop.inline.hpp"
 
@@ -38,6 +39,7 @@
 #include "runtime/interfaceSupport.hpp"
 #include "runtime/os.hpp"
 
+#include "utilities/array.hpp"
 #include "utilities/debug.hpp"
 #include "utilities/macros.hpp"
 #include "utilities/exceptions.hpp"
@@ -726,7 +728,6 @@
   return result;
 WB_END
 
-
 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
   return (jlong) Thread::current()->stack_size();
 WB_END
@@ -736,6 +737,35 @@
   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
 WB_END
 
+int WhiteBox::array_bytes_to_length(size_t bytes) {
+  return Array<u1>::bytes_to_length(bytes);
+}
+
+WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
+  if (size < 0) {
+    THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
+        err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
+  }
+
+  oop class_loader_oop = JNIHandles::resolve(class_loader);
+  ClassLoaderData* cld = class_loader_oop != NULL
+      ? java_lang_ClassLoader::loader_data(class_loader_oop)
+      : ClassLoaderData::the_null_class_loader_data();
+
+  void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
+
+  return (jlong)(uintptr_t)metadata;
+WB_END
+
+WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
+  oop class_loader_oop = JNIHandles::resolve(class_loader);
+  ClassLoaderData* cld = class_loader_oop != NULL
+      ? java_lang_ClassLoader::loader_data(class_loader_oop)
+      : ClassLoaderData::the_null_class_loader_data();
+
+  MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
+WB_END
+
 //Some convenience methods to deal with objects from java
 int WhiteBox::offset_for_field(const char* field_name, oop object,
     Symbol* signature_symbol) {
@@ -866,6 +896,10 @@
   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
+  {CC"allocateMetaspace",
+     CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
+  {CC"freeMetaspace",
+     CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
   {CC"getNMethod",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
                                                       (void*)&WB_GetNMethod         },