--- a/hotspot/src/share/vm/runtime/thread.hpp	Mon Mar 30 17:21:54 2015 +0200
+++ b/hotspot/src/share/vm/runtime/thread.hpp	Tue Mar 31 07:54:56 2015 +0200
@@ -551,6 +551,7 @@
   Monitor* owned_locks() const                   { return _owned_locks;          }
   bool owns_locks() const                        { return owned_locks() != NULL; }
   bool owns_locks_but_compiled_lock() const;
+  int oops_do_parity() const                     { return _oops_do_parity; }
 
   // Deadlock detection
   bool allow_allocation()                        { return _allow_allocation_count == 0; }
@@ -1855,6 +1856,7 @@
   static int         _number_of_threads;
   static int         _number_of_non_daemon_threads;
   static int         _return_code;
+  static int         _thread_claim_parity;
 #ifdef ASSERT
   static bool        _vm_complete;
 #endif
@@ -1884,9 +1886,10 @@
   // Does not include JNI_VERSION_1_1
   static jboolean is_supported_jni_version(jint version);
 
-  // Garbage collection
-  static void follow_other_roots(void f(oop*));
+  static int thread_claim_parity() { return _thread_claim_parity; }
+  static void change_thread_claim_parity();
 
+  static void assert_all_threads_claimed() PRODUCT_RETURN;
   // Apply "f->do_oop" to all root oops in all threads.
   // This version may only be called by sequential code.
   static void oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf);