--- old/src/share/vm/prims/whitebox.hpp	2014-11-14 16:56:35.691861864 +0300
+++ new/src/share/vm/prims/whitebox.hpp	2014-11-14 16:56:35.523861867 +0300
@@ -27,6 +27,7 @@
 
 #include "prims/jni.h"
 
+#include "utilities/exceptions.hpp"
 #include "memory/allocation.hpp"
 #include "oops/oopsHierarchy.hpp"
 #include "oops/symbol.hpp"
@@ -56,6 +57,7 @@
 
 class CodeBlob;
 class CodeHeap;
+class JavaThread;
 
 class WhiteBox : public AllStatic {
  private:
@@ -68,7 +70,8 @@
     Symbol* signature_symbol);
   static const char* lookup_jstring(const char* field_name, oop object);
   static bool lookup_bool(const char* field_name, oop object);
-  static void force_sweep();
+  static void sweeper_thread_entry(JavaThread* thread, TRAPS);
+  static JavaThread* create_sweeper_thread(TRAPS);
   static int get_blob_type(const CodeBlob* code);
   static CodeHeap* get_code_heap(int blob_type);
   static CodeBlob* allocate_code_blob(int blob_type, int size);