*** old/src/share/vm/runtime/os.hpp	Wed Aug 16 10:56:42 2017
--- new/src/share/vm/runtime/os.hpp	Wed Aug 16 10:56:42 2017

*** 474,484 ****
--- 474,483 ----
  
    static ExtendedPC fetch_frame_from_context(const void* ucVoid, intptr_t** sp, intptr_t** fp);
    static frame      fetch_frame_from_context(const void* ucVoid);
    static frame      fetch_frame_from_ucontext(Thread* thread, void* ucVoid);
  
    static ExtendedPC get_thread_pc(Thread *thread);
    static void breakpoint();
    static bool start_debugging(char *buf, int buflen);
  
    static address current_stack_pointer();
    static address current_stack_base();