src/share/vm/gc/shared/gcId.hpp

*** 38,47 ****
--- 38,48 ----
    // Returns the currently active GC id. Asserts that there is an active GC id.
    static const uint current();
    // Same as current() but can return undefined() if no GC id is currently active
    static const uint current_raw();
    static const uint undefined() { return UNDEFINED; }
+   static size_t print_prefix(char* buf, size_t len);
  };
  
  class GCIdMark : public StackObj {
    uint _gc_id;
   public: