+/* GC write barriers support */
+void mono_gc_wbarrier_set_field (MonoObject *obj, gpointer field_ptr, MonoObject* value);
+void mono_gc_wbarrier_set_arrayref (MonoArray *arr, gpointer slot_ptr, MonoObject* value);
+void mono_gc_wbarrier_arrayref_copy (MonoArray *arr, gpointer slot_ptr, int count);
+void mono_gc_wbarrier_generic_store (gpointer ptr, MonoObject* value);
+void mono_gc_wbarrier_value_copy (gpointer dest, gpointer src, int count, MonoClass *klass);
+void mono_gc_wbarrier_object (MonoObject* obj);
+