174 ShouldNotReachHere();
175 return nullptr;
176 }
177
178 Method* Klass::uncached_lookup_method(const Symbol* name, const Symbol* signature,
179 OverpassLookupMode overpass_mode,
180 PrivateLookupMode private_mode) const {
181 #ifdef ASSERT
182 tty->print_cr("Error: uncached_lookup_method called on a klass oop."
183 " Likely error: reflection method does not correctly"
184 " wrap return value in a mirror object.");
185 #endif
186 ShouldNotReachHere();
187 return nullptr;
188 }
189
190 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw() {
191 return Metaspace::allocate(loader_data, word_size, MetaspaceObj::ClassType, THREAD);
192 }
193
194 Klass::Klass() : _kind(UnknownKlassKind) {
195 assert(CDSConfig::is_dumping_static_archive() || UseSharedSpaces, "only for cds");
196 }
197
198 // "Normal" instantiation is preceded by a MetaspaceObj allocation
199 // which zeros out memory - calloc equivalent.
200 // The constructor is also used from CppVtableCloner,
201 // which doesn't zero out the memory before calling the constructor.
202 Klass::Klass(KlassKind kind) : _kind(kind),
203 _shared_class_path_index(-1) {
204 CDS_ONLY(_shared_class_flags = 0;)
205 CDS_JAVA_HEAP_ONLY(_archived_mirror_index = -1;)
206 _primary_supers[0] = this;
207 set_super_check_offset(in_bytes(primary_supers_offset()));
208 }
209
210 jint Klass::array_layout_helper(BasicType etype) {
211 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype");
212 // Note that T_ARRAY is not allowed here.
213 int hsize = arrayOopDesc::base_offset_in_bytes(etype);
214 int esize = type2aelembytes(etype);
215 bool isobj = (etype == T_OBJECT);
216 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value;
217 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize));
218
219 assert(lh < (int)_lh_neutral_value, "must look like an array layout");
220 assert(layout_helper_is_array(lh), "correct kind");
221 assert(layout_helper_is_objArray(lh) == isobj, "correct kind");
222 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind");
729 void Klass::print_on(outputStream* st) const {
730 ResourceMark rm;
731 // print title
732 st->print("%s", internal_name());
733 print_address_on(st);
734 st->cr();
735 }
736
737 #define BULLET " - "
738
739 // Caller needs ResourceMark
740 void Klass::oop_print_on(oop obj, outputStream* st) {
741 // print title
742 st->print_cr("%s ", internal_name());
743 obj->print_address_on(st);
744
745 if (WizardMode) {
746 // print header
747 obj->mark().print_on(st);
748 st->cr();
749 }
750
751 // print class
752 st->print(BULLET"klass: ");
753 obj->klass()->print_value_on(st);
754 st->cr();
755 }
756
757 void Klass::oop_print_value_on(oop obj, outputStream* st) {
758 // print title
759 ResourceMark rm; // Cannot print in debug mode without this
760 st->print("%s", internal_name());
761 obj->print_address_on(st);
762 }
763
764 // Verification
765
766 void Klass::verify_on(outputStream* st) {
767
768 // This can be expensive, but it is worth checking that this klass is actually
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174 ShouldNotReachHere();
175 return nullptr;
176 }
177
178 Method* Klass::uncached_lookup_method(const Symbol* name, const Symbol* signature,
179 OverpassLookupMode overpass_mode,
180 PrivateLookupMode private_mode) const {
181 #ifdef ASSERT
182 tty->print_cr("Error: uncached_lookup_method called on a klass oop."
183 " Likely error: reflection method does not correctly"
184 " wrap return value in a mirror object.");
185 #endif
186 ShouldNotReachHere();
187 return nullptr;
188 }
189
190 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw() {
191 return Metaspace::allocate(loader_data, word_size, MetaspaceObj::ClassType, THREAD);
192 }
193
194 static markWord make_prototype(Klass* kls) {
195 markWord prototype = markWord::prototype();
196 #ifdef _LP64
197 if (UseCompactObjectHeaders) {
198 prototype = prototype.set_klass(kls);
199 }
200 #endif
201 return prototype;
202 }
203
204 Klass::Klass() : _kind(UnknownKlassKind) {
205 assert(CDSConfig::is_dumping_static_archive() || UseSharedSpaces, "only for cds");
206 }
207
208 // "Normal" instantiation is preceded by a MetaspaceObj allocation
209 // which zeros out memory - calloc equivalent.
210 // The constructor is also used from CppVtableCloner,
211 // which doesn't zero out the memory before calling the constructor.
212 Klass::Klass(KlassKind kind) : _kind(kind),
213 _prototype_header(make_prototype(this)),
214 _shared_class_path_index(-1) {
215 CDS_ONLY(_shared_class_flags = 0;)
216 CDS_JAVA_HEAP_ONLY(_archived_mirror_index = -1;)
217 _primary_supers[0] = this;
218 set_super_check_offset(in_bytes(primary_supers_offset()));
219 }
220
221 jint Klass::array_layout_helper(BasicType etype) {
222 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype");
223 // Note that T_ARRAY is not allowed here.
224 int hsize = arrayOopDesc::base_offset_in_bytes(etype);
225 int esize = type2aelembytes(etype);
226 bool isobj = (etype == T_OBJECT);
227 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value;
228 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize));
229
230 assert(lh < (int)_lh_neutral_value, "must look like an array layout");
231 assert(layout_helper_is_array(lh), "correct kind");
232 assert(layout_helper_is_objArray(lh) == isobj, "correct kind");
233 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind");
740 void Klass::print_on(outputStream* st) const {
741 ResourceMark rm;
742 // print title
743 st->print("%s", internal_name());
744 print_address_on(st);
745 st->cr();
746 }
747
748 #define BULLET " - "
749
750 // Caller needs ResourceMark
751 void Klass::oop_print_on(oop obj, outputStream* st) {
752 // print title
753 st->print_cr("%s ", internal_name());
754 obj->print_address_on(st);
755
756 if (WizardMode) {
757 // print header
758 obj->mark().print_on(st);
759 st->cr();
760 if (UseCompactObjectHeaders) {
761 st->print(BULLET"prototype_header: " INTPTR_FORMAT, _prototype_header.value());
762 st->cr();
763 }
764 }
765
766 // print class
767 st->print(BULLET"klass: ");
768 obj->klass()->print_value_on(st);
769 st->cr();
770 }
771
772 void Klass::oop_print_value_on(oop obj, outputStream* st) {
773 // print title
774 ResourceMark rm; // Cannot print in debug mode without this
775 st->print("%s", internal_name());
776 obj->print_address_on(st);
777 }
778
779 // Verification
780
781 void Klass::verify_on(outputStream* st) {
782
783 // This can be expensive, but it is worth checking that this klass is actually
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