429   const size_t length_in_bytes = static_cast<size_t>(_length) << ArrayKlass::cast(_klass)->log2_element_size();
430   const BasicType element_type = ArrayKlass::cast(_klass)->element_type();
431   const size_t base_offset_in_bytes = arrayOopDesc::base_offset_in_bytes(element_type);
432   const size_t size_in_bytes = _word_size * BytesPerWord;
433 
434   const address obj_end = reinterpret_cast<address>(mem) + size_in_bytes;
435   const address base = reinterpret_cast<address>(mem) + base_offset_in_bytes;
436   const address elements_end = base + length_in_bytes;
437   assert(elements_end <= obj_end, "payload must fit in object");
438   if (elements_end < obj_end) {
439     const size_t padding_in_bytes = obj_end - elements_end;
440     Copy::fill_to_bytes(elements_end, padding_in_bytes, heapPaddingByteVal);
441   }
442 }
443 #endif
444 
445 oop ClassAllocator::initialize(HeapWord* mem) const {
446   // Set oop_size field before setting the _klass field because a
447   // non-null _klass field indicates that the object is parsable by
448   // concurrent GC.
449   assert(_word_size > 0, "oop_size must be positive.");
450   mem_clear(mem);
451   java_lang_Class::set_oop_size(mem, _word_size);
452   return finish(mem);
453 }

429   const size_t length_in_bytes = static_cast<size_t>(_length) << ArrayKlass::cast(_klass)->log2_element_size();
430   const BasicType element_type = ArrayKlass::cast(_klass)->element_type();
431   const size_t base_offset_in_bytes = arrayOopDesc::base_offset_in_bytes(element_type);
432   const size_t size_in_bytes = _word_size * BytesPerWord;
433 
434   const address obj_end = reinterpret_cast<address>(mem) + size_in_bytes;
435   const address base = reinterpret_cast<address>(mem) + base_offset_in_bytes;
436   const address elements_end = base + length_in_bytes;
437   assert(elements_end <= obj_end, "payload must fit in object");
438   if (elements_end < obj_end) {
439     const size_t padding_in_bytes = obj_end - elements_end;
440     Copy::fill_to_bytes(elements_end, padding_in_bytes, heapPaddingByteVal);
441   }
442 }
443 #endif
444 
445 oop ClassAllocator::initialize(HeapWord* mem) const {
446   // Set oop_size field before setting the _klass field because a
447   // non-null _klass field indicates that the object is parsable by
448   // concurrent GC.
449   assert(_base_size > 0, "oop_size must be positive.");
450   mem_clear(mem);
451   java_lang_Class::set_oop_size(mem, _base_size);
452   return finish(mem);
453 }