3375       Atomic::add(strings_processed, &_strings_processed);
3376       Atomic::add(strings_removed, &_strings_removed);
3377     }
3378     if (_process_symbols) {
3379       SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed);
3380       Atomic::add(symbols_processed, &_symbols_processed);
3381       Atomic::add(symbols_removed, &_symbols_removed);
3382     }
3383     if (_process_string_dedup) {
3384       G1StringDedup::parallel_unlink(&_dedup_closure, worker_id);
3385     }
3386   }
3387 
3388   size_t strings_processed() const { return (size_t)_strings_processed; }
3389   size_t strings_removed()   const { return (size_t)_strings_removed; }
3390 
3391   size_t symbols_processed() const { return (size_t)_symbols_processed; }
3392   size_t symbols_removed()   const { return (size_t)_symbols_removed; }
3393 };
3394 
3395 class G1CodeCacheUnloadingTask VALUE_OBJ_CLASS_SPEC {
3396 private:
3397   static Monitor* _lock;
3398 
3399   BoolObjectClosure* const _is_alive;
3400   const bool               _unloading_occurred;
3401   const uint               _num_workers;
3402 
3403   // Variables used to claim nmethods.
3404   CompiledMethod* _first_nmethod;
3405   CompiledMethod* volatile _claimed_nmethod;
3406 
3407   // The list of nmethods that need to be processed by the second pass.
3408   CompiledMethod* volatile _postponed_list;
3409   volatile uint            _num_entered_barrier;
3410 
3411  public:
3412   G1CodeCacheUnloadingTask(uint num_workers, BoolObjectClosure* is_alive, bool unloading_occurred) :
3413       _is_alive(is_alive),
3414       _unloading_occurred(unloading_occurred),
3415       _num_workers(num_workers),

3375       Atomic::add(strings_processed, &_strings_processed);
3376       Atomic::add(strings_removed, &_strings_removed);
3377     }
3378     if (_process_symbols) {
3379       SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed);
3380       Atomic::add(symbols_processed, &_symbols_processed);
3381       Atomic::add(symbols_removed, &_symbols_removed);
3382     }
3383     if (_process_string_dedup) {
3384       G1StringDedup::parallel_unlink(&_dedup_closure, worker_id);
3385     }
3386   }
3387 
3388   size_t strings_processed() const { return (size_t)_strings_processed; }
3389   size_t strings_removed()   const { return (size_t)_strings_removed; }
3390 
3391   size_t symbols_processed() const { return (size_t)_symbols_processed; }
3392   size_t symbols_removed()   const { return (size_t)_symbols_removed; }
3393 };
3394 
3395 class G1CodeCacheUnloadingTask {
3396 private:
3397   static Monitor* _lock;
3398 
3399   BoolObjectClosure* const _is_alive;
3400   const bool               _unloading_occurred;
3401   const uint               _num_workers;
3402 
3403   // Variables used to claim nmethods.
3404   CompiledMethod* _first_nmethod;
3405   CompiledMethod* volatile _claimed_nmethod;
3406 
3407   // The list of nmethods that need to be processed by the second pass.
3408   CompiledMethod* volatile _postponed_list;
3409   volatile uint            _num_entered_barrier;
3410 
3411  public:
3412   G1CodeCacheUnloadingTask(uint num_workers, BoolObjectClosure* is_alive, bool unloading_occurred) :
3413       _is_alive(is_alive),
3414       _unloading_occurred(unloading_occurred),
3415       _num_workers(num_workers),