2862 class PrintAndVerifyOopClosure: public OopClosure {

  2863  protected:

  2864   template <class T> inline void do_oop_work(T* p) {

  2865     oop obj = oopDesc::load_decode_heap_oop(p);

  2866     if (obj == NULL) return;

  2867     tty->print(INTPTR_FORMAT ": ", p);

  2868     if (obj->is_oop_or_null()) {

  2869       if (obj->is_objArray()) {

  2870         tty->print_cr("valid objArray: " INTPTR_FORMAT, (oopDesc*) obj);

  2871       } else {

  2872         obj->print();

  2873       }

  2874     } else {

  2875       tty->print_cr("invalid oop: " INTPTR_FORMAT, (oopDesc*) obj);

  2876     }

  2877     tty->cr();

  2878   }

  2879  public:

  2880   virtual void do_oop(oop* p) { do_oop_work(p); }

  2881   virtual void do_oop(narrowOop* p)  { do_oop_work(p); }

  2882 };

  2883 

  2884 

  2885 static void oops_print(frame* f, const RegisterMap *map) {

  2886   PrintAndVerifyOopClosure print;

  2887   f->print_value();

  2888   f->oops_do(&print, NULL, (RegisterMap*)map);

  2889 }

  2890 

  2891 // Print our all the locations that contain oops and whether they are

  2892 // valid or not.  This useful when trying to find the oldest frame

  2893 // where an oop has gone bad since the frame walk is from youngest to

  2894 // oldest.

  2895 void JavaThread::trace_oops() {

  2896   tty->print_cr("[Trace oops]");

  2897   frames_do(oops_print);

  2898 }

  2899