src/share/vm/ci/ciMethodData.hpp

rev 9358 : 8057038: Speculative traps not robust when compilation and class unloading are concurrent
Summary: speculative traps can be removed from MDO while being copied by compiler
Reviewed-by: kvn, iveresov

*** 405,417 ****
    int _backedge_counter;
  
    // Coherent snapshot of original header.
    MethodData _orig;
  
!   // Dedicated area dedicated to parameters. Null if no parameter
    // profiling for this method.
    DataLayout* _parameters;
  
    ciMethodData(MethodData* md);
    ciMethodData();
  
    // Accessors
--- 405,420 ----
    int _backedge_counter;
  
    // Coherent snapshot of original header.
    MethodData _orig;
  
!   // Area dedicated to parameters. Null if no parameter
    // profiling for this method.
    DataLayout* _parameters;
+   int parameters_size() const {
+     return _parameters == NULL ? 0 : parameters_type_data()->size_in_bytes();
+   }
  
    ciMethodData(MethodData* md);
    ciMethodData();
  
    // Accessors
*** 459,471 ****
    ciArgInfoData *arg_info() const;
  
    address data_base() const {
      return (address) _data;
    }
-   DataLayout* limit_data_position() const {
-     return (DataLayout*)((address)data_base() + _data_size);
-   }
  
    void load_extra_data();
    ciProfileData* bci_to_extra_data(int bci, ciMethod* m, bool& two_free_slots);
  
  public:
--- 462,471 ----
*** 517,527 ****
    // Walk through the data in order.
    ciProfileData* first_data() { return data_at(first_di()); }
    ciProfileData* next_data(ciProfileData* current);
    bool is_valid(ciProfileData* current) { return current != NULL; }
  
!   DataLayout* extra_data_base() const { return limit_data_position(); }
  
    // Get the data at an arbitrary bci, or NULL if there is none. If m
    // is not NULL look for a SpeculativeTrapData if any first.
    ciProfileData* bci_to_data(int bci, ciMethod* m = NULL);
  
--- 517,529 ----
    // Walk through the data in order.
    ciProfileData* first_data() { return data_at(first_di()); }
    ciProfileData* next_data(ciProfileData* current);
    bool is_valid(ciProfileData* current) { return current != NULL; }
  
!   DataLayout* extra_data_base() const  { return data_layout_at(data_size()); }
!   DataLayout* args_data_limit() const  { return data_layout_at(data_size() + extra_data_size() -
!                                                                parameters_size()); }
  
    // Get the data at an arbitrary bci, or NULL if there is none. If m
    // is not NULL look for a SpeculativeTrapData if any first.
    ciProfileData* bci_to_data(int bci, ciMethod* m = NULL);