src/hotspot/share/classfile/classLoaderData.hpp

CLD claiming v2

*** 257,267 ****
    s2 _keep_alive;          // if this CLD is kept alive.
                             // Used for unsafe anonymous classes and the boot class
                             // loader. _keep_alive does not need to be volatile or
                             // atomic since there is one unique CLD per unsafe anonymous class.
  
!   volatile int _claim_value; // non-zero if claimed, for example during GC traces.
                               // To avoid applying oop closure more than once.
    ChunkedHandleList _handles; // Handles to constant pool arrays, Modules, etc, which
                                // have the same life cycle of the corresponding ClassLoader.
  
    NOT_PRODUCT(volatile int _dependency_count;)  // number of class loader dependencies
--- 257,267 ----
    s2 _keep_alive;          // if this CLD is kept alive.
                             // Used for unsafe anonymous classes and the boot class
                             // loader. _keep_alive does not need to be volatile or
                             // atomic since there is one unique CLD per unsafe anonymous class.
  
!   volatile int _claim; // non-zero if claimed, for example during GC traces.
                               // To avoid applying oop closure more than once.
    ChunkedHandleList _handles; // Handles to constant pool arrays, Modules, etc, which
                                // have the same life cycle of the corresponding ClassLoader.
  
    NOT_PRODUCT(volatile int _dependency_count;)  // number of class loader dependencies
***************
*** 332,354 ****
    void initialize_name(Handle class_loader);
  
   public:
    // GC interface.
  
!   // The "claim_value" is typically used to check if oops_do needs to be applied on
!   // the CLD or not. Most GCs only perform strong marking during the marking phase,
!   // in which case the claim value is
    enum {
!     _claim_value_none        = 0,
!     _claim_value_strong      = 1,
!     _claim_value_finalizable = 2
    };
!   void clear_claimed() { _claim_value = 0; }
!   bool claimed() const { return _claim_value != 0; }
!   bool claim(int claim_value);
!   int claim_value() const { return _claim_value; }
!   void set_claim_value(int claim_value) { _claim_value = claim_value; }
  
    // Computes if the CLD is alive or not. This is safe to call in concurrent
    // contexts.
    bool is_alive() const;
  
--- 332,353 ----
    void initialize_name(Handle class_loader);
  
   public:
    // GC interface.
  
!   // The "claim" is typically used to check if oops_do needs to be applied on
!   // the CLD or not. Most GCs only perform strong marking during the marking phase.
    enum {
!     _claim_none        = 0,
!     _claim_finalizable = 2,
!     _claim_strong      = 3
    };
!   void clear_claim() { _claim = 0; }
!   bool claimed() const { return _claim != 0; }
!   bool try_claim(int claim);
!   int get_claim() const { return _claim; }
!   void set_claim(int claim) { _claim = claim; }
  
    // Computes if the CLD is alive or not. This is safe to call in concurrent
    // contexts.
    bool is_alive() const;