// "Normal" instantiation is preceeded by a MetaspaceObj allocation // which zeros out memory - calloc equivalent. // The constructor is also used from init_self_patching_vtbl_list, // which doesn't zero out the memory before calling the constructor. // Need to set the _java_mirror field explicitly to not hit an assert that the field // should be NULL before setting it. Klass::Klass() : _prototype_header(markOopDesc::prototype()), _shared_class_path_index(-1), _java_mirror(NULL) { _primary_supers[0] = this; set_super_check_offset(in_bytes(primary_supers_offset())); }
Klass::Klass() { Klass* k = this; { // Preinitialize supertype information. // A later call to initialize_supers() may update these settings: set_super(NULL); for (juint i = 0; i < Klass::primary_super_limit(); i++) { _primary_supers[i] = NULL; } set_secondary_supers(NULL); _primary_supers[0] = k; set_super_check_offset(in_bytes(primary_supers_offset())); } set_java_mirror(NULL); set_modifier_flags(0); set_layout_helper(Klass::_lh_neutral_value); set_name(NULL); AccessFlags af; af.set_flags(0); set_access_flags(af); set_subklass(NULL); set_next_sibling(NULL); set_next_link(NULL); set_alloc_count(0); TRACE_SET_KLASS_TRACE_ID(this, 0); set_prototype_header(markOopDesc::prototype()); set_biased_lock_revocation_count(0); set_last_biased_lock_bulk_revocation_time(0); // The klass doesn't have any references at this point. clear_modified_oops(); clear_accumulated_modified_oops(); }
klassOop Klass::base_create_klass_oop(KlassHandle& klass, int size, const Klass_vtbl& vtbl, TRAPS) { size = align_object_size(size); // allocate and initialize vtable Klass* kl = (Klass*) vtbl.allocate_permanent(klass, size, CHECK_NULL); klassOop k = kl->as_klassOop(); { // Preinitialize supertype information. // A later call to initialize_supers() may update these settings: kl->set_super(NULL); for (juint i = 0; i < Klass::primary_super_limit(); i++) { kl->_primary_supers[i] = NULL; } kl->set_secondary_supers(NULL); oop_store_without_check((oop*) &kl->_primary_supers[0], k); kl->set_super_check_offset(in_bytes(primary_supers_offset())); } kl->set_java_mirror(NULL); kl->set_modifier_flags(0); kl->set_layout_helper(Klass::_lh_neutral_value); kl->set_name(NULL); AccessFlags af; af.set_flags(0); kl->set_access_flags(af); kl->set_subklass(NULL); kl->set_next_sibling(NULL); kl->set_alloc_count(0); kl->set_alloc_size(0); TRACE_SET_KLASS_TRACE_ID(kl, 0); kl->set_prototype_header(markOopDesc::prototype()); kl->set_biased_lock_revocation_count(0); kl->set_last_biased_lock_bulk_revocation_time(0); return k; }