253 tty->print_cr("Error: find_field called on a klass oop."
254 " Likely error: reflection method does not correctly"
255 " wrap return value in a mirror object.");
256 #endif
257 ShouldNotReachHere();
258 return nullptr;
259 }
260
261 Method* Klass::uncached_lookup_method(const Symbol* name, const Symbol* signature,
262 OverpassLookupMode overpass_mode,
263 PrivateLookupMode private_mode) const {
264 #ifdef ASSERT
265 tty->print_cr("Error: uncached_lookup_method called on a klass oop."
266 " Likely error: reflection method does not correctly"
267 " wrap return value in a mirror object.");
268 #endif
269 ShouldNotReachHere();
270 return nullptr;
271 }
272
273 static markWord make_prototype(const Klass* kls) {
274 markWord prototype = markWord::prototype();
275 #ifdef _LP64
276 if (UseCompactObjectHeaders) {
277 // With compact object headers, the narrow Klass ID is part of the mark word.
278 // We therefore seed the mark word with the narrow Klass ID.
279 precond(CompressedKlassPointers::is_encodable(kls));
280 const narrowKlass nk = CompressedKlassPointers::encode(const_cast<Klass*>(kls));
281 prototype = prototype.set_narrow_klass(nk);
282 }
283 #endif
284 return prototype;
285 }
286
287 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw() {
288 return Metaspace::allocate(loader_data, word_size, MetaspaceObj::ClassType, THREAD);
289 }
290
291 Klass::Klass() : _kind(UnknownKlassKind) {
292 assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for cds");
293 }
294
295 // "Normal" instantiation is preceded by a MetaspaceObj allocation
296 // which zeros out memory - calloc equivalent.
297 // The constructor is also used from CppVtableCloner,
298 // which doesn't zero out the memory before calling the constructor.
299 Klass::Klass(KlassKind kind) : _kind(kind),
300 _prototype_header(make_prototype(this)),
301 _shared_class_path_index(-1) {
302 CDS_ONLY(_aot_class_flags = 0;)
303 CDS_JAVA_HEAP_ONLY(_archived_mirror_index = -1;)
304 _primary_supers[0] = this;
305 set_super_check_offset(in_bytes(primary_supers_offset()));
306 }
307
308 jint Klass::array_layout_helper(BasicType etype) {
309 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype");
310 // Note that T_ARRAY is not allowed here.
311 int hsize = arrayOopDesc::base_offset_in_bytes(etype);
312 int esize = type2aelembytes(etype);
313 bool isobj = (etype == T_OBJECT);
314 int tag = isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value;
315 int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize));
316
317 assert(lh < (int)_lh_neutral_value, "must look like an array layout");
318 assert(layout_helper_is_array(lh), "correct kind");
319 assert(layout_helper_is_objArray(lh) == isobj, "correct kind");
320 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind");
321 assert(layout_helper_header_size(lh) == hsize, "correct decode");
322 assert(layout_helper_element_type(lh) == etype, "correct decode");
323 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode");
324
325 return lh;
326 }
327
328 int Klass::modifier_flags() const {
329 int mods = java_lang_Class::modifiers(java_mirror());
330 assert(mods == compute_modifier_flags(), "should be same");
331 return mods;
332 }
333
334 bool Klass::can_be_primary_super_slow() const {
335 if (super() == nullptr)
336 return true;
337 else if (super()->super_depth() >= primary_super_limit()-1)
338 return false;
339 else
1012 void Klass::print_on(outputStream* st) const {
1013 ResourceMark rm;
1014 // print title
1015 st->print("%s", internal_name());
1016 print_address_on(st);
1017 st->cr();
1018 }
1019
1020 #define BULLET " - "
1021
1022 // Caller needs ResourceMark
1023 void Klass::oop_print_on(oop obj, outputStream* st) {
1024 // print title
1025 st->print_cr("%s ", internal_name());
1026 obj->print_address_on(st);
1027
1028 if (WizardMode) {
1029 // print header
1030 obj->mark().print_on(st);
1031 st->cr();
1032 if (UseCompactObjectHeaders) {
1033 st->print(BULLET"prototype_header: " INTPTR_FORMAT, _prototype_header.value());
1034 st->cr();
1035 }
1036 }
1037
1038 // print class
1039 st->print(BULLET"klass: ");
1040 obj->klass()->print_value_on(st);
1041 st->print(BULLET"flags: "); _misc_flags.print_on(st); st->cr();
1042 st->cr();
1043 }
1044
1045 void Klass::oop_print_value_on(oop obj, outputStream* st) {
1046 // print title
1047 ResourceMark rm; // Cannot print in debug mode without this
1048 st->print("%s", internal_name());
1049 obj->print_address_on(st);
1050 }
1051
1052 // Verification
1053
1054 void Klass::verify_on(outputStream* st) {
1055
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253 tty->print_cr("Error: find_field called on a klass oop."
254 " Likely error: reflection method does not correctly"
255 " wrap return value in a mirror object.");
256 #endif
257 ShouldNotReachHere();
258 return nullptr;
259 }
260
261 Method* Klass::uncached_lookup_method(const Symbol* name, const Symbol* signature,
262 OverpassLookupMode overpass_mode,
263 PrivateLookupMode private_mode) const {
264 #ifdef ASSERT
265 tty->print_cr("Error: uncached_lookup_method called on a klass oop."
266 " Likely error: reflection method does not correctly"
267 " wrap return value in a mirror object.");
268 #endif
269 ShouldNotReachHere();
270 return nullptr;
271 }
272
273 void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw() {
274 return Metaspace::allocate(loader_data, word_size, MetaspaceObj::ClassType, THREAD);
275 }
276
277 Klass::Klass() : _kind(UnknownKlassKind) {
278 assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for cds");
279 }
280
281 // "Normal" instantiation is preceded by a MetaspaceObj allocation
282 // which zeros out memory - calloc equivalent.
283 // The constructor is also used from CppVtableCloner,
284 // which doesn't zero out the memory before calling the constructor.
285 Klass::Klass(KlassKind kind, markWord prototype_header) : _kind(kind),
286 _shared_class_path_index(-1) {
287 set_prototype_header(make_prototype_header(this, prototype_header));
288 CDS_ONLY(_aot_class_flags = 0;)
289 CDS_JAVA_HEAP_ONLY(_archived_mirror_index = -1;)
290 _primary_supers[0] = this;
291 set_super_check_offset(in_bytes(primary_supers_offset()));
292 }
293
294 jint Klass::array_layout_helper(BasicType etype) {
295 assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype");
296 // Note that T_ARRAY is not allowed here.
297 int hsize = arrayOopDesc::base_offset_in_bytes(etype);
298 int esize = type2aelembytes(etype);
299 bool isobj = (etype == T_OBJECT);
300 int tag = isobj ? _lh_array_tag_ref_value : _lh_array_tag_type_value;
301 int lh = array_layout_helper(tag, false, hsize, etype, exact_log2(esize));
302
303 assert(lh < (int)_lh_neutral_value, "must look like an array layout");
304 assert(layout_helper_is_array(lh), "correct kind");
305 assert(layout_helper_is_refArray(lh) == isobj, "correct kind");
306 assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind");
307 assert(layout_helper_header_size(lh) == hsize, "correct decode");
308 assert(layout_helper_element_type(lh) == etype, "correct decode");
309 assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode");
310
311 return lh;
312 }
313
314 int Klass::modifier_flags() const {
315 int mods = java_lang_Class::modifiers(java_mirror());
316 assert(mods == compute_modifier_flags(), "should be same");
317 return mods;
318 }
319
320 bool Klass::can_be_primary_super_slow() const {
321 if (super() == nullptr)
322 return true;
323 else if (super()->super_depth() >= primary_super_limit()-1)
324 return false;
325 else
998 void Klass::print_on(outputStream* st) const {
999 ResourceMark rm;
1000 // print title
1001 st->print("%s", internal_name());
1002 print_address_on(st);
1003 st->cr();
1004 }
1005
1006 #define BULLET " - "
1007
1008 // Caller needs ResourceMark
1009 void Klass::oop_print_on(oop obj, outputStream* st) {
1010 // print title
1011 st->print_cr("%s ", internal_name());
1012 obj->print_address_on(st);
1013
1014 if (WizardMode) {
1015 // print header
1016 obj->mark().print_on(st);
1017 st->cr();
1018 st->print(BULLET"prototype_header: " INTPTR_FORMAT, _prototype_header.value());
1019 st->cr();
1020 }
1021
1022 // print class
1023 st->print(BULLET"klass: ");
1024 obj->klass()->print_value_on(st);
1025 st->print(BULLET"flags: "); _misc_flags.print_on(st); st->cr();
1026 st->cr();
1027 }
1028
1029 void Klass::oop_print_value_on(oop obj, outputStream* st) {
1030 // print title
1031 ResourceMark rm; // Cannot print in debug mode without this
1032 st->print("%s", internal_name());
1033 obj->print_address_on(st);
1034 }
1035
1036 // Verification
1037
1038 void Klass::verify_on(outputStream* st) {
1039
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