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src/share/vm/gc_implementation/g1/satbQueue.hpp

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rev 7209 : 6979279


  61     PtrQueue(qset, perm, false /* active */) { }
  62 
  63   // Overrides PtrQueue::flush() so that it can filter the buffer
  64   // before it is flushed.
  65   virtual void flush();
  66 
  67   // Overrides PtrQueue::should_enqueue_buffer(). See the method's
  68   // definition for more information.
  69   virtual bool should_enqueue_buffer();
  70 
  71 #ifndef PRODUCT
  72   // Helpful for debugging
  73   void print(const char* name);
  74   static void print(const char* name, void** buf, size_t index, size_t sz);
  75 #endif // PRODUCT
  76 
  77   void verify_oops_in_buffer() NOT_DEBUG_RETURN;
  78 };
  79 
  80 class SATBMarkQueueSet: public PtrQueueSet {
  81   ObjectClosure* _closure;
  82   ObjectClosure** _par_closures;  // One per ParGCThread.
  83 
  84   ObjPtrQueue _shared_satb_queue;
  85 
  86   // Utility function to support sequential and parallel versions.  If
  87   // "par" is true, then "worker" is the par thread id; if "false", worker
  88   // is ignored.
  89   bool apply_closure_to_completed_buffer_work(bool par, uint worker);
  90 
  91 #ifdef ASSERT
  92   void dump_active_states(bool expected_active);
  93   void verify_active_states(bool expected_active);
  94 #endif // ASSERT
  95 
  96 public:
  97   SATBMarkQueueSet();
  98 
  99   void initialize(Monitor* cbl_mon, Mutex* fl_lock,
 100                   int process_completed_threshold,
 101                   Mutex* lock);
 102 
 103   static void handle_zero_index_for_thread(JavaThread* t);
 104 
 105   // Apply "set_active(active)" to all SATB queues in the set. It should be
 106   // called only with the world stopped. The method will assert that the
 107   // SATB queues of all threads it visits, as well as the SATB queue
 108   // set itself, has an active value same as expected_active.
 109   void set_active_all_threads(bool active, bool expected_active);
 110 
 111   // Filter all the currently-active SATB buffers.
 112   void filter_thread_buffers();
 113 
 114   // Register "blk" as "the closure" for all queues.  Only one such closure
 115   // is allowed.  The "apply_closure_to_completed_buffer" method will apply
 116   // this closure to a completed buffer, and "iterate_closure_all_threads"
 117   // applies it to partially-filled buffers (the latter should only be done
 118   // with the world stopped).
 119   void set_closure(ObjectClosure* closure);
 120   // Set the parallel closures: pointer is an array of pointers to
 121   // closures, one for each parallel GC thread.
 122   void set_par_closure(int i, ObjectClosure* closure);
 123 
 124   // If there exists some completed buffer, pop it, then apply the
 125   // registered closure to all its elements, and return true.  If no
 126   // completed buffers exist, return false.
 127   bool apply_closure_to_completed_buffer() {
 128     return apply_closure_to_completed_buffer_work(false, 0);
 129   }
 130   // Parallel version of the above.
 131   bool par_apply_closure_to_completed_buffer(uint worker) {
 132     return apply_closure_to_completed_buffer_work(true, worker);
 133   }
 134 
 135   // Apply the given closure on enqueued and currently-active buffers
 136   // respectively. Both methods are read-only, i.e., they do not
 137   // modify any of the buffers.
 138   void iterate_completed_buffers_read_only(ObjectClosure* cl);
 139   void iterate_thread_buffers_read_only(ObjectClosure* cl);
 140 
 141 #ifndef PRODUCT
 142   // Helpful for debugging
 143   void print_all(const char* msg);
 144 #endif // PRODUCT
 145 
 146   ObjPtrQueue* shared_satb_queue() { return &_shared_satb_queue; }
 147 
 148   // If a marking is being abandoned, reset any unprocessed log buffers.
 149   void abandon_partial_marking();
 150 };
 151 
 152 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_SATBQUEUE_HPP


  61     PtrQueue(qset, perm, false /* active */) { }
  62 
  63   // Overrides PtrQueue::flush() so that it can filter the buffer
  64   // before it is flushed.
  65   virtual void flush();
  66 
  67   // Overrides PtrQueue::should_enqueue_buffer(). See the method's
  68   // definition for more information.
  69   virtual bool should_enqueue_buffer();
  70 
  71 #ifndef PRODUCT
  72   // Helpful for debugging
  73   void print(const char* name);
  74   static void print(const char* name, void** buf, size_t index, size_t sz);
  75 #endif // PRODUCT
  76 
  77   void verify_oops_in_buffer() NOT_DEBUG_RETURN;
  78 };
  79 
  80 class SATBMarkQueueSet: public PtrQueueSet {
  81   ObjectClosure** _closures;  // One per ParGCThread.

  82 
  83   ObjPtrQueue _shared_satb_queue;
  84 





  85 #ifdef ASSERT
  86   void dump_active_states(bool expected_active);
  87   void verify_active_states(bool expected_active);
  88 #endif // ASSERT
  89 
  90 public:
  91   SATBMarkQueueSet();
  92 
  93   void initialize(Monitor* cbl_mon, Mutex* fl_lock,
  94                   int process_completed_threshold,
  95                   Mutex* lock);
  96 
  97   static void handle_zero_index_for_thread(JavaThread* t);
  98 
  99   // Apply "set_active(active)" to all SATB queues in the set. It should be
 100   // called only with the world stopped. The method will assert that the
 101   // SATB queues of all threads it visits, as well as the SATB queue
 102   // set itself, has an active value same as expected_active.
 103   void set_active_all_threads(bool active, bool expected_active);
 104 
 105   // Filter all the currently-active SATB buffers.
 106   void filter_thread_buffers();
 107 
 108   // Register "blk" as "the closure" for all queues.  Only one such closure
 109   // is allowed.  The "apply_closure_to_completed_buffer" method will apply
 110   // this closure to a completed buffer, and "iterate_closure_all_threads"
 111   // applies it to partially-filled buffers (the latter should only be done
 112   // with the world stopped).
 113   void set_closure(int i, ObjectClosure* closure);



 114 
 115   // If there exists some completed buffer, pop it, then apply the
 116   // registered closure to all its elements, and return true.  If no
 117   // completed buffers exist, return false.
 118   bool apply_closure_to_completed_buffer(uint worker);






 119 
 120   // Apply the given closure on enqueued and currently-active buffers
 121   // respectively. Both methods are read-only, i.e., they do not
 122   // modify any of the buffers.
 123   void iterate_completed_buffers_read_only(ObjectClosure* cl);
 124   void iterate_thread_buffers_read_only(ObjectClosure* cl);
 125 
 126 #ifndef PRODUCT
 127   // Helpful for debugging
 128   void print_all(const char* msg);
 129 #endif // PRODUCT
 130 
 131   ObjPtrQueue* shared_satb_queue() { return &_shared_satb_queue; }
 132 
 133   // If a marking is being abandoned, reset any unprocessed log buffers.
 134   void abandon_partial_marking();
 135 };
 136 
 137 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_SATBQUEUE_HPP
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