src/hotspot/share/gc/g1/g1BlockOffsetTable.cpp

rev 51891 : 8225716: G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding
Reviewed-by: kbarrett, tschatzl

*** 404,414 ****
    assert(!G1CollectedHeap::heap()->is_in_reserved(_bot->_offset_array),
           "just checking");
    size_t bottom_index = _bot->index_for_raw(_space->bottom());
    assert(_bot->address_for_index_raw(bottom_index) == _space->bottom(),
           "Precondition of call");
!   _bot->set_offset_array_raw(bottom_index, 0);
  }
  
  HeapWord* G1BlockOffsetTablePart::initialize_threshold() {
    assert(!G1CollectedHeap::heap()->is_in_reserved(_bot->_offset_array),
           "just checking");
--- 404,414 ----
    assert(!G1CollectedHeap::heap()->is_in_reserved(_bot->_offset_array),
           "just checking");
    size_t bottom_index = _bot->index_for_raw(_space->bottom());
    assert(_bot->address_for_index_raw(bottom_index) == _space->bottom(),
           "Precondition of call");
!   _bot->set_offset_array(bottom_index, 0);
  }
  
  HeapWord* G1BlockOffsetTablePart::initialize_threshold() {
    assert(!G1CollectedHeap::heap()->is_in_reserved(_bot->_offset_array),
           "just checking");