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 }
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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 }
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