src/share/vm/gc_implementation/shared/gcTrace.cpp

rev 4462 : 8012086: The object count event should only send events for instances occupying more than 0.5% of the heap

*** 89,117 ****
    send_reference_stats_event(REF_WEAK, rps.weak_count());
    send_reference_stats_event(REF_FINAL, rps.final_count());
    send_reference_stats_event(REF_PHANTOM, rps.phantom_count());
  }
  
! class ObjectCountEventSenderClosure : public KlassInfoClosure {
!   GCTracer* _gc_tracer;
!  public:
!   ObjectCountEventSenderClosure(GCTracer* gc_tracer) : _gc_tracer(gc_tracer) {}
!  private:
!   void do_cinfo(KlassInfoEntry* entry) {
      _gc_tracer->send_object_count_after_gc_event(entry->klass(), entry->count(),
                                                   entry->words() * BytesPerWord);
!   }
! };
  
  void GCTracer::report_object_count_after_gc(BoolObjectClosure *is_alive_cl) {
    if (should_send_object_count_after_gc_event()) {
      ResourceMark rm;
  
      KlassInfoTable cit(HeapInspection::start_of_perm_gen());
      if (!cit.allocation_failed()) {
!       ObjectCountEventSenderClosure event_sender(this);
!       HeapInspection::instance_inspection(&cit, &event_sender, false, is_alive_cl);
      }
    }
  }
  
  void GCTracer::report_gc_heap_summary(GCWhen::Type when, const GCHeapSummary& heap_summary, const PermGenSummary& perm_gen_summary) const {
--- 89,136 ----
    send_reference_stats_event(REF_WEAK, rps.weak_count());
    send_reference_stats_event(REF_FINAL, rps.final_count());
    send_reference_stats_event(REF_PHANTOM, rps.phantom_count());
  }
  
! void ObjectCountEventSenderClosure::do_cinfo(KlassInfoEntry* entry) {
!   if (should_send_event(entry)) {
!     send_event(entry);
!   }
! }
! 
! void ObjectCountEventSenderClosure::send_event(KlassInfoEntry* entry) {
    _gc_tracer->send_object_count_after_gc_event(entry->klass(), entry->count(),
                                                 entry->words() * BytesPerWord);
! }
! 
! bool ObjectCountEventSenderClosure::should_send_event(KlassInfoEntry* entry) const {
!   double percentage_of_heap = ((double) entry->words()) / _used_heap_in_words;
!   return percentage_of_heap > _size_threshold_percentage;
! }
! 
! bool ObjectCountFilter::do_object_b(oop obj) {
!   bool is_alive = _is_alive == NULL? true : _is_alive->do_object_b(obj);
!   return is_alive && is_externally_visible_klass(obj->klass());
! }
! 
! bool ObjectCountFilter::is_externally_visible_klass(klassOop k) const {
!   // Do not expose internal implementation specific classes
!   return (k->klass_part()->oop_is_instance() || k->klass_part()->oop_is_array()) &&
!          k != Universe::systemObjArrayKlassObj();
! }
  
  void GCTracer::report_object_count_after_gc(BoolObjectClosure *is_alive_cl) {
    if (should_send_object_count_after_gc_event()) {
      ResourceMark rm;
  
      KlassInfoTable cit(HeapInspection::start_of_perm_gen());
      if (!cit.allocation_failed()) {
!       ObjectCountFilter object_filter(is_alive_cl);
!       HeapInspection::populate_table(&cit, false, &object_filter);
! 
!       ObjectCountEventSenderClosure event_sender(this, cit.size_of_instances_in_words());
!       cit.iterate(&event_sender);
      }
    }
  }
  
  void GCTracer::report_gc_heap_summary(GCWhen::Type when, const GCHeapSummary& heap_summary, const PermGenSummary& perm_gen_summary) const {