src/hotspot/share/gc/shared/plab.cpp

rev 50815 : Abstraction for TLAB dummy object

*** 84,103 ****
  size_t PLAB::retire_internal() {
    size_t result = 0;
    if (_top < _hard_end) {
      assert(pointer_delta(_hard_end, _top) >= (size_t)(oopDesc::header_size() + Universe::heap()->oop_extra_words()),
             "better have enough space left to fill with dummy");
!     HeapWord* obj = Universe::heap()->tlab_post_allocation_setup(_top);
!     CollectedHeap::fill_with_object(obj, _hard_end);
      result += invalidate();
    }
    return result;
  }
  
  void PLAB::add_undo_waste(HeapWord* obj, size_t word_sz) {
!   HeapWord* head_obj = Universe::heap()->tlab_post_allocation_setup(obj);
!   CollectedHeap::fill_with_object(head_obj, word_sz - (head_obj - obj));
    _undo_wasted += word_sz;
  }
  
  void PLAB::undo_last_allocation(HeapWord* obj, size_t word_sz) {
    assert(pointer_delta(_top, _bottom) >= word_sz, "Bad undo");
--- 84,101 ----
  size_t PLAB::retire_internal() {
    size_t result = 0;
    if (_top < _hard_end) {
      assert(pointer_delta(_hard_end, _top) >= (size_t)(oopDesc::header_size() + Universe::heap()->oop_extra_words()),
             "better have enough space left to fill with dummy");
!     Universe::heap()->fill_with_dummy_object(_top, _hard_end, false);
      result += invalidate();
    }
    return result;
  }
  
  void PLAB::add_undo_waste(HeapWord* obj, size_t word_sz) {
!   Universe::heap()->fill_with_dummy_object(obj, obj + word_sz, false);
    _undo_wasted += word_sz;
  }
  
  void PLAB::undo_last_allocation(HeapWord* obj, size_t word_sz) {
    assert(pointer_delta(_top, _bottom) >= word_sz, "Bad undo");