4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "cds/cdsConfig.hpp"
25 #include "classfile/classFileParser.hpp"
26 #include "classfile/classFileStream.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/classLoaderData.inline.hpp"
29 #include "classfile/classLoadInfo.hpp"
30 #include "classfile/defaultMethods.hpp"
31 #include "classfile/fieldLayoutBuilder.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/packageEntry.hpp"
35 #include "classfile/symbolTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/verificationType.hpp"
38 #include "classfile/verifier.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "jvm.h"
42 #include "logging/log.hpp"
43 #include "logging/logStream.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/metadataFactory.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/annotations.hpp"
50 #include "oops/constantPool.inline.hpp"
51 #include "oops/fieldInfo.hpp"
52 #include "oops/fieldStreams.inline.hpp"
53 #include "oops/instanceKlass.inline.hpp"
54 #include "oops/instanceMirrorKlass.hpp"
55 #include "oops/klass.inline.hpp"
56 #include "oops/klassVtable.hpp"
57 #include "oops/metadata.hpp"
58 #include "oops/method.inline.hpp"
59 #include "oops/oop.inline.hpp"
60 #include "oops/recordComponent.hpp"
61 #include "oops/symbol.hpp"
62 #include "prims/jvmtiExport.hpp"
63 #include "prims/jvmtiThreadState.hpp"
64 #include "runtime/arguments.hpp"
65 #include "runtime/fieldDescriptor.inline.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/os.hpp"
69 #include "runtime/perfData.hpp"
70 #include "runtime/reflection.hpp"
71 #include "runtime/safepointVerifiers.hpp"
72 #include "runtime/signature.hpp"
73 #include "runtime/timer.hpp"
74 #include "services/classLoadingService.hpp"
75 #include "services/threadService.hpp"
76 #include "utilities/align.hpp"
77 #include "utilities/bitMap.inline.hpp"
78 #include "utilities/checkedCast.hpp"
79 #include "utilities/copy.hpp"
80 #include "utilities/exceptions.hpp"
81 #include "utilities/formatBuffer.hpp"
82 #include "utilities/globalDefinitions.hpp"
83 #include "utilities/growableArray.hpp"
84 #include "utilities/hashTable.hpp"
85 #include "utilities/macros.hpp"
86 #include "utilities/ostream.hpp"
87 #include "utilities/utf8.hpp"
88 #if INCLUDE_CDS
89 #include "classfile/systemDictionaryShared.hpp"
90 #endif
91 #if INCLUDE_JFR
92 #include "jfr/support/jfrTraceIdExtension.hpp"
93 #endif
94
95 // We generally try to create the oops directly when parsing, rather than
96 // allocating temporary data structures and copying the bytes twice. A
97 // temporary area is only needed when parsing utf8 entries in the constant
98 // pool and when parsing line number tables.
99
100 // We add assert in debug mode when class format is not checked.
101
102 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
103 #define JAVA_MIN_SUPPORTED_VERSION 45
104 #define JAVA_PREVIEW_MINOR_VERSION 65535
105
106 // Used for two backward compatibility reasons:
139 #define JAVA_17_VERSION 61
140
141 #define JAVA_18_VERSION 62
142
143 #define JAVA_19_VERSION 63
144
145 #define JAVA_20_VERSION 64
146
147 #define JAVA_21_VERSION 65
148
149 #define JAVA_22_VERSION 66
150
151 #define JAVA_23_VERSION 67
152
153 #define JAVA_24_VERSION 68
154
155 #define JAVA_25_VERSION 69
156
157 #define JAVA_26_VERSION 70
158
159 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
160 assert((bad_constant == JVM_CONSTANT_Module ||
161 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
162 "Unexpected bad constant pool entry");
163 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
164 }
165
166 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
167 ConstantPool* cp,
168 const int length,
169 TRAPS) {
170 assert(stream != nullptr, "invariant");
171 assert(cp != nullptr, "invariant");
172
173 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
174 // this function (_current can be allocated in a register, with scalar
175 // replacement of aggregates). The _current pointer is copied back to
176 // stream() when this function returns. DON'T call another method within
177 // this method that uses stream().
178 const ClassFileStream cfs1 = *stream;
179 const ClassFileStream* const cfs = &cfs1;
180
181 DEBUG_ONLY(const u1* const old_current = stream->current();)
182
183 // Used for batching symbol allocations.
184 const char* names[SymbolTable::symbol_alloc_batch_size];
185 int lengths[SymbolTable::symbol_alloc_batch_size];
186 int indices[SymbolTable::symbol_alloc_batch_size];
187 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
188 int names_count = 0;
189
190 // parsing Index 0 is unused
191 for (int index = 1; index < length; index++) {
192 // Each of the following case guarantees one more byte in the stream
193 // for the following tag or the access_flags following constant pool,
194 // so we don't need bounds-check for reading tag.
195 const u1 tag = cfs->get_u1_fast();
196 switch (tag) {
197 case JVM_CONSTANT_Class : {
198 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
199 const u2 name_index = cfs->get_u2_fast();
200 cp->klass_index_at_put(index, name_index);
201 break;
202 }
203 case JVM_CONSTANT_Fieldref: {
204 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
205 const u2 class_index = cfs->get_u2_fast();
206 const u2 name_and_type_index = cfs->get_u2_fast();
207 cp->field_at_put(index, class_index, name_and_type_index);
208 break;
209 }
210 case JVM_CONSTANT_Methodref: {
211 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
212 const u2 class_index = cfs->get_u2_fast();
213 const u2 name_and_type_index = cfs->get_u2_fast();
214 cp->method_at_put(index, class_index, name_and_type_index);
215 break;
216 }
217 case JVM_CONSTANT_InterfaceMethodref: {
481 guarantee_property(valid_symbol_at(name_ref_index),
482 "Invalid constant pool index %u in class file %s",
483 name_ref_index, CHECK);
484 guarantee_property(valid_symbol_at(signature_ref_index),
485 "Invalid constant pool index %u in class file %s",
486 signature_ref_index, CHECK);
487 break;
488 }
489 case JVM_CONSTANT_Utf8:
490 break;
491 case JVM_CONSTANT_UnresolvedClass: // fall-through
492 case JVM_CONSTANT_UnresolvedClassInError: {
493 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
494 break;
495 }
496 case JVM_CONSTANT_ClassIndex: {
497 const int class_index = cp->klass_index_at(index);
498 guarantee_property(valid_symbol_at(class_index),
499 "Invalid constant pool index %u in class file %s",
500 class_index, CHECK);
501 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
502 break;
503 }
504 case JVM_CONSTANT_StringIndex: {
505 const int string_index = cp->string_index_at(index);
506 guarantee_property(valid_symbol_at(string_index),
507 "Invalid constant pool index %u in class file %s",
508 string_index, CHECK);
509 Symbol* const sym = cp->symbol_at(string_index);
510 cp->unresolved_string_at_put(index, sym);
511 break;
512 }
513 case JVM_CONSTANT_MethodHandle: {
514 const int ref_index = cp->method_handle_index_at(index);
515 guarantee_property(valid_cp_range(ref_index, length),
516 "Invalid constant pool index %u in class file %s",
517 ref_index, CHECK);
518 const constantTag tag = cp->tag_at(ref_index);
519 const int ref_kind = cp->method_handle_ref_kind_at(index);
520
690 }
691 }
692 } else {
693 if (_need_verify) {
694 // Method name and signature are individually verified above, when iterating
695 // NameAndType_info. Need to check here that signature is non-zero length and
696 // the right type.
697 if (!Signature::is_method(signature)) {
698 throwIllegalSignature("Method", name, signature, CHECK);
699 }
700 }
701 // If a class method name begins with '<', it must be "<init>" and have void signature.
702 const unsigned int name_len = name->utf8_length();
703 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
704 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
705 if (name != vmSymbols::object_initializer_name()) {
706 classfile_parse_error(
707 "Bad method name at constant pool index %u in class file %s",
708 name_ref_index, THREAD);
709 return;
710 } else if (!Signature::is_void_method(signature)) { // must have void signature.
711 throwIllegalSignature("Method", name, signature, CHECK);
712 }
713 }
714 }
715 break;
716 }
717 case JVM_CONSTANT_MethodHandle: {
718 const int ref_index = cp->method_handle_index_at(index);
719 const int ref_kind = cp->method_handle_ref_kind_at(index);
720 switch (ref_kind) {
721 case JVM_REF_invokeVirtual:
722 case JVM_REF_invokeStatic:
723 case JVM_REF_invokeSpecial:
724 case JVM_REF_newInvokeSpecial: {
725 const int name_and_type_ref_index =
726 cp->uncached_name_and_type_ref_index_at(ref_index);
727 const int name_ref_index =
728 cp->name_ref_index_at(name_and_type_ref_index);
729 const Symbol* const name = cp->symbol_at(name_ref_index);
730 if (ref_kind == JVM_REF_newInvokeSpecial) {
731 if (name != vmSymbols::object_initializer_name()) {
732 classfile_parse_error(
733 "Bad constructor name at constant pool index %u in class file %s",
734 name_ref_index, THREAD);
735 return;
736 }
737 } else {
738 if (name == vmSymbols::object_initializer_name()) {
739 classfile_parse_error(
740 "Bad method name at constant pool index %u in class file %s",
741 name_ref_index, THREAD);
742 return;
743 }
744 }
745 break;
746 }
747 // Other ref_kinds are already fully checked in previous pass.
748 } // switch(ref_kind)
749 break;
750 }
751 case JVM_CONSTANT_MethodType: {
752 const Symbol* const no_name = vmSymbols::type_name(); // place holder
753 const Symbol* const signature = cp->method_type_signature_at(index);
754 verify_legal_method_signature(no_name, signature, CHECK);
755 break;
756 }
757 case JVM_CONSTANT_Utf8: {
758 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
770
771 NameSigHash(Symbol* name, Symbol* sig) :
772 _name(name),
773 _sig(sig) {}
774
775 static unsigned int hash(NameSigHash const& namesig) {
776 return namesig._name->identity_hash() ^ namesig._sig->identity_hash();
777 }
778
779 static bool equals(NameSigHash const& e0, NameSigHash const& e1) {
780 return (e0._name == e1._name) &&
781 (e0._sig == e1._sig);
782 }
783 };
784
785 using NameSigHashtable = HashTable<NameSigHash, int,
786 NameSigHash::HASH_ROW_SIZE,
787 AnyObj::RESOURCE_AREA, mtInternal,
788 &NameSigHash::hash, &NameSigHash::equals>;
789
790 // Side-effects: populates the _local_interfaces field
791 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
792 const int itfs_len,
793 ConstantPool* const cp,
794 bool* const has_nonstatic_concrete_methods,
795 TRAPS) {
796 assert(stream != nullptr, "invariant");
797 assert(cp != nullptr, "invariant");
798 assert(has_nonstatic_concrete_methods != nullptr, "invariant");
799
800 if (itfs_len == 0) {
801 _local_interfaces = Universe::the_empty_instance_klass_array();
802 } else {
803 assert(itfs_len > 0, "only called for len>0");
804 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, nullptr, CHECK);
805
806 int index;
807 for (index = 0; index < itfs_len; index++) {
808 const u2 interface_index = stream->get_u2(CHECK);
809 Klass* interf;
810 guarantee_property(
811 valid_klass_reference_at(interface_index),
812 "Interface name has bad constant pool index %u in class file %s",
813 interface_index, CHECK);
814 if (cp->tag_at(interface_index).is_klass()) {
815 interf = cp->resolved_klass_at(interface_index);
816 } else {
817 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
818
819 // Don't need to check legal name because it's checked when parsing constant pool.
820 // But need to make sure it's not an array type.
821 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
822 "Bad interface name in class file %s", CHECK);
823
824 // Call resolve on the interface class name with class circularity checking
825 interf = SystemDictionary::resolve_super_or_fail(_class_name,
826 unresolved_klass,
827 Handle(THREAD, _loader_data->class_loader()),
828 false, CHECK);
829 }
830
831 if (!interf->is_interface()) {
832 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
833 err_msg("class %s can not implement %s, because it is not an interface (%s)",
834 _class_name->as_klass_external_name(),
835 interf->external_name(),
836 interf->class_in_module_of_loader()));
837 }
838
839 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
840 *has_nonstatic_concrete_methods = true;
841 }
842 _local_interfaces->at_put(index, InstanceKlass::cast(interf));
843 }
844
845 if (!_need_verify || itfs_len <= 1) {
846 return;
847 }
848
849 // Check if there's any duplicates in interfaces
850 ResourceMark rm(THREAD);
851 // Set containing interface names
852 HashTable<Symbol*, int>* interface_names = new HashTable<Symbol*, int>();
853 for (index = 0; index < itfs_len; index++) {
854 const InstanceKlass* const k = _local_interfaces->at(index);
855 Symbol* interface_name = k->name();
856 // If no duplicates, add (name, nullptr) in hashtable interface_names.
857 if (!interface_names->put(interface_name, 0)) {
858 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
859 interface_name->as_C_string(), THREAD);
860 return;
861 }
862 }
863 }
864 }
865
866 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
867 int constantvalue_index,
868 int signature_index,
869 TRAPS) const {
870 // Make sure the constant pool entry is of a type appropriate to this field
871 guarantee_property(
872 (constantvalue_index > 0 &&
873 constantvalue_index < cp->length()),
874 "Bad initial value index %u in ConstantValue attribute in class file %s",
875 constantvalue_index, CHECK);
922 class AnnotationCollector : public ResourceObj{
923 public:
924 enum Location { _in_field, _in_method, _in_class };
925 enum ID {
926 _unknown = 0,
927 _method_CallerSensitive,
928 _method_ForceInline,
929 _method_DontInline,
930 _method_ChangesCurrentThread,
931 _method_JvmtiHideEvents,
932 _method_JvmtiMountTransition,
933 _method_InjectedProfile,
934 _method_LambdaForm_Compiled,
935 _method_Hidden,
936 _method_Scoped,
937 _method_IntrinsicCandidate,
938 _jdk_internal_vm_annotation_Contended,
939 _field_Stable,
940 _jdk_internal_vm_annotation_ReservedStackAccess,
941 _jdk_internal_ValueBased,
942 _java_lang_Deprecated,
943 _java_lang_Deprecated_for_removal,
944 _jdk_internal_vm_annotation_AOTSafeClassInitializer,
945 _method_AOTRuntimeSetup,
946 _annotation_LIMIT
947 };
948 const Location _location;
949 int _annotations_present;
950 u2 _contended_group;
951
952 AnnotationCollector(Location location)
953 : _location(location), _annotations_present(0), _contended_group(0)
954 {
955 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
956 }
957 // If this annotation name has an ID, report it (or _none).
958 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
959 // Set the annotation name:
960 void set_annotation(ID id) {
961 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1348 }
1349
1350 *constantvalue_index_addr = constantvalue_index;
1351 *is_synthetic_addr = is_synthetic;
1352 *generic_signature_index_addr = generic_signature_index;
1353 AnnotationArray* a = allocate_annotations(runtime_visible_annotations,
1354 runtime_visible_annotations_length,
1355 CHECK);
1356 parsed_annotations->set_field_annotations(a);
1357 a = allocate_annotations(runtime_visible_type_annotations,
1358 runtime_visible_type_annotations_length,
1359 CHECK);
1360 parsed_annotations->set_field_type_annotations(a);
1361 return;
1362 }
1363
1364
1365 // Side-effects: populates the _fields, _fields_annotations,
1366 // _fields_type_annotations fields
1367 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1368 bool is_interface,
1369 ConstantPool* cp,
1370 const int cp_size,
1371 u2* const java_fields_count_ptr,
1372 TRAPS) {
1373
1374 assert(cfs != nullptr, "invariant");
1375 assert(cp != nullptr, "invariant");
1376 assert(java_fields_count_ptr != nullptr, "invariant");
1377
1378 assert(nullptr == _fields_annotations, "invariant");
1379 assert(nullptr == _fields_type_annotations, "invariant");
1380
1381 cfs->guarantee_more(2, CHECK); // length
1382 const u2 length = cfs->get_u2_fast();
1383 *java_fields_count_ptr = length;
1384
1385 int num_injected = 0;
1386 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1387 &num_injected);
1388 const int total_fields = length + num_injected;
1389
1390 // Allocate a temporary resource array to collect field data.
1391 // After parsing all fields, data are stored in a UNSIGNED5 compressed stream.
1392 _temp_field_info = new GrowableArray<FieldInfo>(total_fields);
1393
1394 ResourceMark rm(THREAD);
1395 for (int n = 0; n < length; n++) {
1396 // access_flags, name_index, descriptor_index, attributes_count
1397 cfs->guarantee_more(8, CHECK);
1398
1399 AccessFlags access_flags;
1400 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1401 verify_legal_field_modifiers(flags, is_interface, CHECK);
1402 access_flags.set_flags(flags);
1403 FieldInfo::FieldFlags fieldFlags(0);
1404
1405 const u2 name_index = cfs->get_u2_fast();
1406 guarantee_property(valid_symbol_at(name_index),
1407 "Invalid constant pool index %u for field name in class file %s",
1408 name_index, CHECK);
1409 const Symbol* const name = cp->symbol_at(name_index);
1410 verify_legal_field_name(name, CHECK);
1411
1412 const u2 signature_index = cfs->get_u2_fast();
1413 guarantee_property(valid_symbol_at(signature_index),
1414 "Invalid constant pool index %u for field signature in class file %s",
1415 signature_index, CHECK);
1416 const Symbol* const sig = cp->symbol_at(signature_index);
1417 verify_legal_field_signature(name, sig, CHECK);
1418
1419 u2 constantvalue_index = 0;
1420 bool is_synthetic = false;
1421 u2 generic_signature_index = 0;
1422 const bool is_static = access_flags.is_static();
1423 FieldAnnotationCollector parsed_annotations(_loader_data);
1424
1425 const u2 attributes_count = cfs->get_u2_fast();
1426 if (attributes_count > 0) {
1427 parse_field_attributes(cfs,
1428 attributes_count,
1429 is_static,
1430 signature_index,
1431 &constantvalue_index,
1432 &is_synthetic,
1433 &generic_signature_index,
1434 &parsed_annotations,
1435 CHECK);
1436
1437 if (parsed_annotations.field_annotations() != nullptr) {
1438 if (_fields_annotations == nullptr) {
1439 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1440 _loader_data, length, nullptr,
1441 CHECK);
1442 }
1443 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1444 parsed_annotations.set_field_annotations(nullptr);
1445 }
1446 if (parsed_annotations.field_type_annotations() != nullptr) {
1447 if (_fields_type_annotations == nullptr) {
1448 _fields_type_annotations =
1449 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1450 length,
1451 nullptr,
1452 CHECK);
1453 }
1454 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1455 parsed_annotations.set_field_type_annotations(nullptr);
1456 }
1457
1458 if (is_synthetic) {
1459 access_flags.set_is_synthetic();
1460 }
1461 if (generic_signature_index != 0) {
1462 fieldFlags.update_generic(true);
1463 }
1464 }
1465
1466 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1467
1468 // Update number of static oop fields.
1469 if (is_static && is_reference_type(type)) {
1470 _static_oop_count++;
1471 }
1472
1473 FieldInfo fi(access_flags, name_index, signature_index, constantvalue_index, fieldFlags);
1474 fi.set_index(n);
1475 if (fieldFlags.is_generic()) {
1476 fi.set_generic_signature_index(generic_signature_index);
1477 }
1478 parsed_annotations.apply_to(&fi);
1479 if (fi.field_flags().is_contended()) {
1480 _has_contended_fields = true;
1481 }
1482 _temp_field_info->append(fi);
1483 }
1484 assert(_temp_field_info->length() == length, "Must be");
1485
1486 int index = length;
1487 if (num_injected != 0) {
1488 for (int n = 0; n < num_injected; n++) {
1489 // Check for duplicates
1490 if (injected[n].may_be_java) {
1491 const Symbol* const name = injected[n].name();
1492 const Symbol* const signature = injected[n].signature();
1493 bool duplicate = false;
1494 for (int i = 0; i < length; i++) {
1495 const FieldInfo* const f = _temp_field_info->adr_at(i);
1496 if (name == cp->symbol_at(f->name_index()) &&
1497 signature == cp->symbol_at(f->signature_index())) {
1498 // Symbol is desclared in Java so skip this one
1499 duplicate = true;
1500 break;
1501 }
1502 }
1503 if (duplicate) {
1504 // These will be removed from the field array at the end
1505 continue;
1506 }
1507 }
1508
1509 // Injected field
1510 FieldInfo::FieldFlags fflags(0);
1511 fflags.update_injected(true);
1512 AccessFlags aflags;
1513 FieldInfo fi(aflags, (u2)(injected[n].name_index), (u2)(injected[n].signature_index), 0, fflags);
1514 fi.set_index(index);
1515 _temp_field_info->append(fi);
1516 index++;
1517 }
1518 }
1519
1520 assert(_temp_field_info->length() == index, "Must be");
1521
1522 if (_need_verify && length > 1) {
1523 // Check duplicated fields
1524 ResourceMark rm(THREAD);
1525 // Set containing name-signature pairs
1526 NameSigHashtable* names_and_sigs = new NameSigHashtable();
1527 for (int i = 0; i < _temp_field_info->length(); i++) {
1528 NameSigHash name_and_sig(_temp_field_info->adr_at(i)->name(_cp),
1529 _temp_field_info->adr_at(i)->signature(_cp));
1530 // If no duplicates, add name/signature in hashtable names_and_sigs.
1531 if(!names_and_sigs->put(name_and_sig, 0)) {
1532 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1533 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
1534 return;
1535 }
1536 }
1537 }
1538 }
1539
1540
1880 }
1881 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
1882 if (_location != _in_field && _location != _in_class) {
1883 break; // only allow for fields and classes
1884 }
1885 if (!EnableContended || (RestrictContended && !privileged)) {
1886 break; // honor privileges
1887 }
1888 return _jdk_internal_vm_annotation_Contended;
1889 }
1890 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
1891 if (_location != _in_method) break; // only allow for methods
1892 if (RestrictReservedStack && !privileged) break; // honor privileges
1893 return _jdk_internal_vm_annotation_ReservedStackAccess;
1894 }
1895 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
1896 if (_location != _in_class) break; // only allow for classes
1897 if (!privileged) break; // only allow in privileged code
1898 return _jdk_internal_ValueBased;
1899 }
1900 case VM_SYMBOL_ENUM_NAME(java_lang_Deprecated): {
1901 return _java_lang_Deprecated;
1902 }
1903 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_AOTSafeClassInitializer_signature): {
1904 if (_location != _in_class) break; // only allow for classes
1905 if (!privileged) break; // only allow in privileged code
1906 return _jdk_internal_vm_annotation_AOTSafeClassInitializer;
1907 }
1908 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_AOTRuntimeSetup_signature): {
1909 if (_location != _in_method) break; // only allow for methods
1910 if (!privileged) break; // only allow in privileged code
1911 return _method_AOTRuntimeSetup;
1912 }
1913 default: {
1914 break;
1915 }
1916 }
1917 return AnnotationCollector::_unknown;
1918 }
1919
2116 }
2117
2118 if (runtime_visible_type_annotations_length > 0) {
2119 a = allocate_annotations(runtime_visible_type_annotations,
2120 runtime_visible_type_annotations_length,
2121 CHECK);
2122 cm->set_type_annotations(a);
2123 }
2124 }
2125
2126
2127 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2128 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2129 // Method* to save footprint, so we only know the size of the resulting Method* when the
2130 // entire method attribute is parsed.
2131 //
2132 // The has_localvariable_table parameter is used to pass up the value to InstanceKlass.
2133
2134 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2135 bool is_interface,
2136 const ConstantPool* cp,
2137 bool* const has_localvariable_table,
2138 TRAPS) {
2139 assert(cfs != nullptr, "invariant");
2140 assert(cp != nullptr, "invariant");
2141 assert(has_localvariable_table != nullptr, "invariant");
2142
2143 ResourceMark rm(THREAD);
2144 // Parse fixed parts:
2145 // access_flags, name_index, descriptor_index, attributes_count
2146 cfs->guarantee_more(8, CHECK_NULL);
2147
2148 u2 flags = cfs->get_u2_fast();
2149 const u2 name_index = cfs->get_u2_fast();
2150 const int cp_size = cp->length();
2151 guarantee_property(
2152 valid_symbol_at(name_index),
2153 "Illegal constant pool index %u for method name in class file %s",
2154 name_index, CHECK_NULL);
2155 const Symbol* const name = cp->symbol_at(name_index);
2157
2158 const u2 signature_index = cfs->get_u2_fast();
2159 guarantee_property(
2160 valid_symbol_at(signature_index),
2161 "Illegal constant pool index %u for method signature in class file %s",
2162 signature_index, CHECK_NULL);
2163 const Symbol* const signature = cp->symbol_at(signature_index);
2164
2165 if (name == vmSymbols::class_initializer_name()) {
2166 // We ignore the other access flags for a valid class initializer.
2167 // (JVM Spec 2nd ed., chapter 4.6)
2168 if (_major_version < 51) { // backward compatibility
2169 flags = JVM_ACC_STATIC;
2170 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2171 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2172 } else {
2173 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2174 return nullptr;
2175 }
2176 } else {
2177 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2178 }
2179
2180 if (name == vmSymbols::object_initializer_name() && is_interface) {
2181 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2182 return nullptr;
2183 }
2184
2185 int args_size = -1; // only used when _need_verify is true
2186 if (_need_verify) {
2187 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2188 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2189 verify_legal_method_signature(name, signature, CHECK_NULL);
2190 if (args_size > MAX_ARGS_SIZE) {
2191 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2192 return nullptr;
2193 }
2194 }
2195
2196 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2197
2198 // Default values for code and exceptions attribute elements
2199 u2 max_stack = 0;
2200 u2 max_locals = 0;
2201 u4 code_length = 0;
2202 const u1* code_start = nullptr;
2203 u2 exception_table_length = 0;
2204 const unsafe_u2* exception_table_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2699 CHECK_NULL);
2700
2701 if (InstanceKlass::is_finalization_enabled() &&
2702 name == vmSymbols::finalize_method_name() &&
2703 signature == vmSymbols::void_method_signature()) {
2704 if (m->is_empty_method()) {
2705 _has_empty_finalizer = true;
2706 } else {
2707 _has_finalizer = true;
2708 }
2709 }
2710
2711 NOT_PRODUCT(m->verify());
2712 return m;
2713 }
2714
2715
2716 // Side-effects: populates the _methods field in the parser
2717 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2718 bool is_interface,
2719 bool* const has_localvariable_table,
2720 bool* has_final_method,
2721 bool* declares_nonstatic_concrete_methods,
2722 TRAPS) {
2723 assert(cfs != nullptr, "invariant");
2724 assert(has_localvariable_table != nullptr, "invariant");
2725 assert(has_final_method != nullptr, "invariant");
2726 assert(declares_nonstatic_concrete_methods != nullptr, "invariant");
2727
2728 assert(nullptr == _methods, "invariant");
2729
2730 cfs->guarantee_more(2, CHECK); // length
2731 const u2 length = cfs->get_u2_fast();
2732 if (length == 0) {
2733 _methods = Universe::the_empty_method_array();
2734 } else {
2735 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2736 length,
2737 nullptr,
2738 CHECK);
2739
2740 for (int index = 0; index < length; index++) {
2741 Method* method = parse_method(cfs,
2742 is_interface,
2743 _cp,
2744 has_localvariable_table,
2745 CHECK);
2746
2747 if (method->is_final()) {
2748 *has_final_method = true;
2749 }
2750 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2751 // used for interface initialization, and default method inheritance analysis
2752 if (is_interface && !(*declares_nonstatic_concrete_methods)
2753 && !method->is_abstract() && !method->is_static()) {
2754 *declares_nonstatic_concrete_methods = true;
2755 }
2756 _methods->at_put(index, method);
2757 }
2758
2759 if (_need_verify && length > 1) {
2760 // Check duplicated methods
2761 ResourceMark rm(THREAD);
2762 // Set containing name-signature pairs
2988 valid_klass_reference_at(outer_class_info_index),
2989 "outer_class_info_index %u has bad constant type in class file %s",
2990 outer_class_info_index, CHECK_0);
2991
2992 if (outer_class_info_index != 0) {
2993 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
2994 char* bytes = (char*)outer_class_name->bytes();
2995 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
2996 "Outer class is an array class in class file %s", CHECK_0);
2997 }
2998 // Inner class name
2999 const u2 inner_name_index = cfs->get_u2_fast();
3000 guarantee_property(
3001 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3002 "inner_name_index %u has bad constant type in class file %s",
3003 inner_name_index, CHECK_0);
3004 if (_need_verify) {
3005 guarantee_property(inner_class_info_index != outer_class_info_index,
3006 "Class is both outer and inner class in class file %s", CHECK_0);
3007 }
3008 // Access flags
3009 u2 flags;
3010 // JVM_ACC_MODULE is defined in JDK-9 and later.
3011 if (_major_version >= JAVA_9_VERSION) {
3012 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3013 } else {
3014 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3015 }
3016 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3017 // Set abstract bit for old class files for backward compatibility
3018 flags |= JVM_ACC_ABSTRACT;
3019 }
3020
3021 Symbol* inner_name_symbol = inner_name_index == 0 ? nullptr : cp->symbol_at(inner_name_index);
3022 verify_legal_class_modifiers(flags, inner_name_symbol, inner_name_index == 0, CHECK_0);
3023 AccessFlags inner_access_flags(flags);
3024
3025 inner_classes->at_put(index++, inner_class_info_index);
3026 inner_classes->at_put(index++, outer_class_info_index);
3027 inner_classes->at_put(index++, inner_name_index);
3028 inner_classes->at_put(index++, inner_access_flags.as_unsigned_short());
3029 }
3030
3031 // Check for circular and duplicate entries.
3032 bool has_circularity = false;
3033 if (_need_verify) {
3034 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3035 if (has_circularity) {
3036 // If circularity check failed then ignore InnerClasses attribute.
3037 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3038 index = 0;
3039 if (parsed_enclosingmethod_attribute) {
3040 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3106 if (length > 0) {
3107 int index = 0;
3108 cfs->guarantee_more(2 * length, CHECK_0);
3109 for (int n = 0; n < length; n++) {
3110 const u2 class_info_index = cfs->get_u2_fast();
3111 guarantee_property(
3112 valid_klass_reference_at(class_info_index),
3113 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3114 class_info_index, CHECK_0);
3115 permitted_subclasses->at_put(index++, class_info_index);
3116 }
3117 assert(index == size, "wrong size");
3118 }
3119
3120 // Restore buffer's current position.
3121 cfs->set_current(current_mark);
3122
3123 return length;
3124 }
3125
3126 // Record {
3127 // u2 attribute_name_index;
3128 // u4 attribute_length;
3129 // u2 components_count;
3130 // component_info components[components_count];
3131 // }
3132 // component_info {
3133 // u2 name_index;
3134 // u2 descriptor_index
3135 // u2 attributes_count;
3136 // attribute_info_attributes[attributes_count];
3137 // }
3138 u4 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3139 const ConstantPool* cp,
3140 const u1* const record_attribute_start,
3141 TRAPS) {
3142 const u1* const current_mark = cfs->current();
3143 int components_count = 0;
3144 unsigned int calculate_attr_size = 0;
3145 if (record_attribute_start != nullptr) {
3371 }
3372 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3373 "Bad length on BootstrapMethods in class file %s",
3374 CHECK);
3375 }
3376
3377 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3378 ConstantPool* cp,
3379 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3380 TRAPS) {
3381 assert(cfs != nullptr, "invariant");
3382 assert(cp != nullptr, "invariant");
3383 assert(parsed_annotations != nullptr, "invariant");
3384
3385 // Set inner classes attribute to default sentinel
3386 _inner_classes = Universe::the_empty_short_array();
3387 // Set nest members attribute to default sentinel
3388 _nest_members = Universe::the_empty_short_array();
3389 // Set _permitted_subclasses attribute to default sentinel
3390 _permitted_subclasses = Universe::the_empty_short_array();
3391 cfs->guarantee_more(2, CHECK); // attributes_count
3392 u2 attributes_count = cfs->get_u2_fast();
3393 bool parsed_sourcefile_attribute = false;
3394 bool parsed_innerclasses_attribute = false;
3395 bool parsed_nest_members_attribute = false;
3396 bool parsed_permitted_subclasses_attribute = false;
3397 bool parsed_nest_host_attribute = false;
3398 bool parsed_record_attribute = false;
3399 bool parsed_enclosingmethod_attribute = false;
3400 bool parsed_bootstrap_methods_attribute = false;
3401 const u1* runtime_visible_annotations = nullptr;
3402 int runtime_visible_annotations_length = 0;
3403 const u1* runtime_visible_type_annotations = nullptr;
3404 int runtime_visible_type_annotations_length = 0;
3405 bool runtime_invisible_type_annotations_exists = false;
3406 bool runtime_invisible_annotations_exists = false;
3407 bool parsed_source_debug_ext_annotations_exist = false;
3408 const u1* inner_classes_attribute_start = nullptr;
3409 u4 inner_classes_attribute_length = 0;
3410 u2 enclosing_method_class_index = 0;
3411 u2 enclosing_method_method_index = 0;
3412 const u1* nest_members_attribute_start = nullptr;
3413 u4 nest_members_attribute_length = 0;
3414 const u1* record_attribute_start = nullptr;
3415 u4 record_attribute_length = 0;
3416 const u1* permitted_subclasses_attribute_start = nullptr;
3417 u4 permitted_subclasses_attribute_length = 0;
3418
3419 // Iterate over attributes
3420 while (attributes_count--) {
3421 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3422 const u2 attribute_name_index = cfs->get_u2_fast();
3423 const u4 attribute_length = cfs->get_u4_fast();
3424 guarantee_property(
3425 valid_symbol_at(attribute_name_index),
3426 "Attribute name has bad constant pool index %u in class file %s",
3427 attribute_name_index, CHECK);
3428 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3429 if (tag == vmSymbols::tag_source_file()) {
3430 // Check for SourceFile tag
3431 if (_need_verify) {
3432 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3433 }
3434 if (parsed_sourcefile_attribute) {
3435 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3436 return;
3437 } else {
3613 return;
3614 }
3615 parsed_record_attribute = true;
3616 record_attribute_start = cfs->current();
3617 record_attribute_length = attribute_length;
3618 } else if (_major_version >= JAVA_17_VERSION) {
3619 if (tag == vmSymbols::tag_permitted_subclasses()) {
3620 if (parsed_permitted_subclasses_attribute) {
3621 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3622 return;
3623 }
3624 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3625 if (_access_flags.is_final()) {
3626 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3627 return;
3628 }
3629 parsed_permitted_subclasses_attribute = true;
3630 permitted_subclasses_attribute_start = cfs->current();
3631 permitted_subclasses_attribute_length = attribute_length;
3632 }
3633 }
3634 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3635 cfs->skip_u1(attribute_length, CHECK);
3636 } else {
3637 // Unknown attribute
3638 cfs->skip_u1(attribute_length, CHECK);
3639 }
3640 } else {
3641 // Unknown attribute
3642 cfs->skip_u1(attribute_length, CHECK);
3643 }
3644 } else {
3645 // Unknown attribute
3646 cfs->skip_u1(attribute_length, CHECK);
3647 }
3648 }
3649 _class_annotations = allocate_annotations(runtime_visible_annotations,
3650 runtime_visible_annotations_length,
3651 CHECK);
3652 _class_type_annotations = allocate_annotations(runtime_visible_type_annotations,
3689 CHECK);
3690 if (_need_verify) {
3691 guarantee_property(record_attribute_length == calculated_attr_length,
3692 "Record attribute has wrong length in class file %s",
3693 CHECK);
3694 }
3695 }
3696
3697 if (parsed_permitted_subclasses_attribute) {
3698 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3699 cfs,
3700 permitted_subclasses_attribute_start,
3701 CHECK);
3702 if (_need_verify) {
3703 guarantee_property(
3704 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3705 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3706 }
3707 }
3708
3709 if (_max_bootstrap_specifier_index >= 0) {
3710 guarantee_property(parsed_bootstrap_methods_attribute,
3711 "Missing BootstrapMethods attribute in class file %s", CHECK);
3712 }
3713 }
3714
3715 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3716 assert(k != nullptr, "invariant");
3717
3718 if (_synthetic_flag)
3719 k->set_is_synthetic();
3720 if (_sourcefile_index != 0) {
3721 k->set_source_file_name_index(_sourcefile_index);
3722 }
3723 if (_generic_signature_index != 0) {
3724 k->set_generic_signature_index(_generic_signature_index);
3725 }
3726 if (_sde_buffer != nullptr) {
3727 k->set_source_debug_extension(_sde_buffer, _sde_length);
3728 }
3755 _class_type_annotations = nullptr;
3756 _fields_annotations = nullptr;
3757 _fields_type_annotations = nullptr;
3758 }
3759
3760 // Transfer ownership of metadata allocated to the InstanceKlass.
3761 void ClassFileParser::apply_parsed_class_metadata(
3762 InstanceKlass* this_klass,
3763 int java_fields_count) {
3764 assert(this_klass != nullptr, "invariant");
3765
3766 _cp->set_pool_holder(this_klass);
3767 this_klass->set_constants(_cp);
3768 this_klass->set_fieldinfo_stream(_fieldinfo_stream);
3769 this_klass->set_fieldinfo_search_table(_fieldinfo_search_table);
3770 this_klass->set_fields_status(_fields_status);
3771 this_klass->set_methods(_methods);
3772 this_klass->set_inner_classes(_inner_classes);
3773 this_klass->set_nest_members(_nest_members);
3774 this_klass->set_nest_host_index(_nest_host);
3775 this_klass->set_annotations(_combined_annotations);
3776 this_klass->set_permitted_subclasses(_permitted_subclasses);
3777 this_klass->set_record_components(_record_components);
3778
3779 DEBUG_ONLY(FieldInfoStream::validate_search_table(_cp, _fieldinfo_stream, _fieldinfo_search_table));
3780
3781 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3782 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3783 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3784 // its _super. If an OOM occurs while loading the current klass, its _super field
3785 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3786 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3787 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3788
3789 // Clear out these fields so they don't get deallocated by the destructor
3790 clear_class_metadata();
3791 }
3792
3793 AnnotationArray* ClassFileParser::allocate_annotations(const u1* const anno,
3794 int anno_length,
3795 TRAPS) {
3796 AnnotationArray* annotations = nullptr;
3797 if (anno != nullptr) {
3798 annotations = MetadataFactory::new_array<u1>(_loader_data,
3799 anno_length,
3800 CHECK_(annotations));
3801 for (int i = 0; i < anno_length; i++) {
3802 annotations->at_put(i, anno[i]);
3803 }
3804 }
3805 return annotations;
3806 }
3807
3808 void ClassFileParser::check_super_class(ConstantPool* const cp,
3809 const int super_class_index,
3810 const bool need_verify,
3811 TRAPS) {
3812 assert(cp != nullptr, "invariant");
3813
3814 if (super_class_index == 0) {
3815 guarantee_property(_class_name == vmSymbols::java_lang_Object(),
3816 "Invalid superclass index %u in class file %s",
3817 super_class_index,
3818 CHECK);
3819 } else {
3820 guarantee_property(valid_klass_reference_at(super_class_index),
3821 "Invalid superclass index %u in class file %s",
3822 super_class_index,
3823 CHECK);
3824
3825 // The class name should be legal because it is checked when parsing constant pool.
3826 // However, make sure it is not an array type.
3827 if (need_verify) {
3828 guarantee_property(cp->klass_name_at(super_class_index)->char_at(0) != JVM_SIGNATURE_ARRAY,
3829 "Bad superclass name in class file %s", CHECK);
3830 }
3831 }
3832 }
3833
3834 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
3835 _max_nonstatic_oop_maps = max_blocks;
3836 _nonstatic_oop_map_count = 0;
3837 if (max_blocks == 0) {
3989 // See documentation of InstanceKlass::can_be_fastpath_allocated().
3990 assert(ik->size_helper() > 0, "layout_helper is initialized");
3991 if (ik->is_abstract() || ik->is_interface()
3992 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == nullptr)
3993 || ik->size_helper() >= FastAllocateSizeLimit) {
3994 // Forbid fast-path allocation.
3995 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
3996 ik->set_layout_helper(lh);
3997 }
3998
3999 // Propagate the AOT runtimeSetup method discovery
4000 if (_has_aot_runtime_setup_method) {
4001 ik->set_is_runtime_setup_required();
4002 if (log_is_enabled(Info, aot, init)) {
4003 ResourceMark rm;
4004 log_info(aot, init)("Found @AOTRuntimeSetup class %s", ik->external_name());
4005 }
4006 }
4007 }
4008
4009 // utility methods for appending an array with check for duplicates
4010
4011 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4012 const Array<InstanceKlass*>* const ifs) {
4013 // iterate over new interfaces
4014 for (int i = 0; i < ifs->length(); i++) {
4015 InstanceKlass* const e = ifs->at(i);
4016 assert(e->is_klass() && e->is_interface(), "just checking");
4017 // add new interface
4018 result->append_if_missing(e);
4019 }
4020 }
4021
4022 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4023 Array<InstanceKlass*>* local_ifs,
4024 ClassLoaderData* loader_data,
4025 TRAPS) {
4026 assert(local_ifs != nullptr, "invariant");
4027 assert(loader_data != nullptr, "invariant");
4028
4032 // Add superclass transitive interfaces size
4033 if (super != nullptr) {
4034 super_size = super->transitive_interfaces()->length();
4035 max_transitive_size += super_size;
4036 }
4037 // Add local interfaces' super interfaces
4038 const int local_size = local_ifs->length();
4039 for (int i = 0; i < local_size; i++) {
4040 InstanceKlass* const l = local_ifs->at(i);
4041 max_transitive_size += l->transitive_interfaces()->length();
4042 }
4043 // Finally add local interfaces
4044 max_transitive_size += local_size;
4045 // Construct array
4046 if (max_transitive_size == 0) {
4047 // no interfaces, use canonicalized array
4048 return Universe::the_empty_instance_klass_array();
4049 } else if (max_transitive_size == super_size) {
4050 // no new local interfaces added, share superklass' transitive interface array
4051 return super->transitive_interfaces();
4052 } else if (max_transitive_size == local_size) {
4053 // only local interfaces added, share local interface array
4054 return local_ifs;
4055 } else {
4056 ResourceMark rm;
4057 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4058
4059 // Copy down from superclass
4060 if (super != nullptr) {
4061 append_interfaces(result, super->transitive_interfaces());
4062 }
4063
4064 // Copy down from local interfaces' superinterfaces
4065 for (int i = 0; i < local_size; i++) {
4066 InstanceKlass* const l = local_ifs->at(i);
4067 append_interfaces(result, l->transitive_interfaces());
4068 }
4069 // Finally add local interfaces
4070 append_interfaces(result, local_ifs);
4071
4072 // length will be less than the max_transitive_size if duplicates were removed
4073 const int length = result->length();
4074 assert(length <= max_transitive_size, "just checking");
4075 Array<InstanceKlass*>* const new_result =
4076 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4077 for (int i = 0; i < length; i++) {
4078 InstanceKlass* const e = result->at(i);
4079 assert(e != nullptr, "just checking");
4080 new_result->at_put(i, e);
4081 }
4082 return new_result;
4083 }
4084 }
4085
4086 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4087 assert(this_klass != nullptr, "invariant");
4088 const InstanceKlass* const super = this_klass->super();
4089
4090 if (super != nullptr) {
4091 if (super->is_final()) {
4092 classfile_icce_error("class %s cannot inherit from final class %s", super, THREAD);
4093 return;
4094 }
4095
4096 if (super->is_sealed()) {
4097 stringStream ss;
4098 ResourceMark rm(THREAD);
4099 if (!super->has_as_permitted_subclass(this_klass, ss)) {
4100 classfile_icce_error(ss.as_string(), THREAD);
4101 return;
4102 }
4103 }
4104
4105 Reflection::VerifyClassAccessResults vca_result =
4106 Reflection::verify_class_access(this_klass, super, false);
4107 if (vca_result != Reflection::ACCESS_OK) {
4108 ResourceMark rm(THREAD);
4109 char* msg = Reflection::verify_class_access_msg(this_klass,
4110 super,
4111 vca_result);
4112
4113 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4114 if (msg == nullptr) {
4115 bool same_module = (this_klass->module() == super->module());
4116 Exceptions::fthrow(
4117 THREAD_AND_LOCATION,
4118 vmSymbols::java_lang_IllegalAccessError(),
4119 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4120 this_klass->external_name(),
4121 super->is_abstract() ? "abstract " : "",
4122 super->external_name(),
4123 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4124 (same_module) ? "" : "; ",
4277 // Verify the class modifiers for the current class, or an inner class if inner_name is non-null.
4278 void ClassFileParser::verify_legal_class_modifiers(jint flags, Symbol* inner_name, bool is_anonymous_inner_class, TRAPS) const {
4279 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4280 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4281 if (is_module) {
4282 ResourceMark rm(THREAD);
4283 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4284 Exceptions::fthrow(
4285 THREAD_AND_LOCATION,
4286 vmSymbols::java_lang_NoClassDefFoundError(),
4287 "%s is not a class because access_flag ACC_MODULE is set",
4288 _class_name->as_C_string());
4289 return;
4290 }
4291
4292 if (!_need_verify) { return; }
4293
4294 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4295 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4296 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4297 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4298 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4299 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4300 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4301
4302 if ((is_abstract && is_final) ||
4303 (is_interface && !is_abstract) ||
4304 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4305 (!is_interface && major_gte_1_5 && is_annotation)) {
4306 ResourceMark rm(THREAD);
4307 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4308 if (inner_name == nullptr && !is_anonymous_inner_class) {
4309 Exceptions::fthrow(
4310 THREAD_AND_LOCATION,
4311 vmSymbols::java_lang_ClassFormatError(),
4312 "Illegal class modifiers in class %s: 0x%X",
4313 _class_name->as_C_string(), flags
4314 );
4315 } else {
4316 if (is_anonymous_inner_class) {
4317 Exceptions::fthrow(
4318 THREAD_AND_LOCATION,
4319 vmSymbols::java_lang_ClassFormatError(),
4320 "Illegal class modifiers in anonymous inner class of class %s: 0x%X",
4321 _class_name->as_C_string(), flags
4322 );
4323 } else {
4324 Exceptions::fthrow(
4325 THREAD_AND_LOCATION,
4326 vmSymbols::java_lang_ClassFormatError(),
4380 THREAD_AND_LOCATION,
4381 vmSymbols::java_lang_UnsupportedClassVersionError(),
4382 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4383 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4384 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4385 return;
4386 }
4387
4388 if (!Arguments::enable_preview()) {
4389 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4390 class_name, major, minor, THREAD);
4391 return;
4392 }
4393
4394 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4395 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4396 class_name, major, minor, THREAD);
4397 }
4398 }
4399
4400 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4401 bool is_interface,
4402 TRAPS) const {
4403 if (!_need_verify) { return; }
4404
4405 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4406 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4407 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4408 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4409 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4410 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4411 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4412 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4413 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4414
4415 bool is_illegal = false;
4416
4417 if (is_interface) {
4418 if (!is_public || !is_static || !is_final || is_private ||
4419 is_protected || is_volatile || is_transient ||
4420 (major_gte_1_5 && is_enum)) {
4421 is_illegal = true;
4422 }
4423 } else { // not interface
4424 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4425 is_illegal = true;
4426 }
4427 }
4428
4429 if (is_illegal) {
4430 ResourceMark rm(THREAD);
4431 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4432 Exceptions::fthrow(
4433 THREAD_AND_LOCATION,
4434 vmSymbols::java_lang_ClassFormatError(),
4435 "Illegal field modifiers in class %s: 0x%X",
4436 _class_name->as_C_string(), flags);
4437 return;
4438 }
4439 }
4440
4441 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4442 bool is_interface,
4443 const Symbol* name,
4444 TRAPS) const {
4445 if (!_need_verify) { return; }
4446
4447 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4448 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4449 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4450 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4451 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4452 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4453 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4454 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4455 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4456 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4457 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4458 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4459 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4460 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4461
4462 bool is_illegal = false;
4463
4464 if (is_interface) {
4465 if (major_gte_8) {
4466 // Class file version is JAVA_8_VERSION or later Methods of
4467 // interfaces may set any of the flags except ACC_PROTECTED,
4468 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4469 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4470 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4471 (is_native || is_protected || is_final || is_synchronized) ||
4472 // If a specific method of a class or interface has its
4473 // ACC_ABSTRACT flag set, it must not have any of its
4474 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4475 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4476 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4477 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4478 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4479 is_illegal = true;
4480 }
4481 } else if (major_gte_1_5) {
4482 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4483 if (!is_public || is_private || is_protected || is_static || is_final ||
4484 is_synchronized || is_native || !is_abstract || is_strict) {
4485 is_illegal = true;
4486 }
4487 } else {
4488 // Class file version is pre-JAVA_1_5_VERSION
4489 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4490 is_illegal = true;
4491 }
4492 }
4493 } else { // not interface
4494 if (has_illegal_visibility(flags)) {
4495 is_illegal = true;
4496 } else {
4497 if (is_initializer) {
4498 if (is_static || is_final || is_synchronized || is_native ||
4499 is_abstract || (major_gte_1_5 && is_bridge)) {
4500 is_illegal = true;
4501 }
4502 } else { // not initializer
4503 if (is_abstract) {
4504 if ((is_final || is_native || is_private || is_static ||
4505 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4506 is_illegal = true;
4507 }
4508 }
4509 }
4510 }
4511 }
4512
4513 if (is_illegal) {
4514 ResourceMark rm(THREAD);
4515 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4516 Exceptions::fthrow(
4517 THREAD_AND_LOCATION,
4518 vmSymbols::java_lang_ClassFormatError(),
4519 "Method %s in class %s has illegal modifiers: 0x%X",
4520 name->as_C_string(), _class_name->as_C_string(), flags);
4521 return;
4522 }
4523 }
4524
4525 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4526 int length,
4527 TRAPS) const {
4528 assert(_need_verify, "only called when _need_verify is true");
4529 // Note: 0 <= length < 64K, as it comes from a u2 entry in the CP.
4530 if (!UTF8::is_legal_utf8(buffer, static_cast<size_t>(length), _major_version <= 47)) {
4531 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4532 }
4533 }
4534
4535 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4536 // In class names, '/' separates unqualified names. This is verified in this function also.
4537 // Method names also may not contain the characters '<' or '>', unless <init>
4538 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4539 // method. Because these names have been checked as special cases before
4540 // calling this method in verify_legal_method_name.
4558 if (type == ClassFileParser::LegalClass) {
4559 if (p == name || p+1 >= name+length ||
4560 *(p+1) == JVM_SIGNATURE_SLASH) {
4561 return false;
4562 }
4563 } else {
4564 return false; // do not permit '/' unless it's class name
4565 }
4566 break;
4567 case JVM_SIGNATURE_SPECIAL:
4568 case JVM_SIGNATURE_ENDSPECIAL:
4569 // do not permit '<' or '>' in method names
4570 if (type == ClassFileParser::LegalMethod) {
4571 return false;
4572 }
4573 }
4574 }
4575 return true;
4576 }
4577
4578 // Take pointer to a UTF8 byte string (not NUL-terminated).
4579 // Skip over the longest part of the string that could
4580 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
4581 // Return a pointer to just past the fieldname.
4582 // Return null if no fieldname at all was found, or in the case of slash_ok
4583 // being true, we saw consecutive slashes (meaning we were looking for a
4584 // qualified path but found something that was badly-formed).
4585 static const char* skip_over_field_name(const char* const name,
4586 bool slash_ok,
4587 unsigned int length) {
4588 const char* p;
4589 jboolean last_is_slash = false;
4590 jboolean not_first_ch = false;
4591
4592 for (p = name; p != name + length; not_first_ch = true) {
4593 const char* old_p = p;
4594 jchar ch = *p;
4595 if (ch < 128) {
4596 p++;
4597 // quick check for ascii
4659 // be taken as a field signature. Allow "void" if void_ok.
4660 // Return a pointer to just past the signature.
4661 // Return null if no legal signature is found.
4662 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4663 bool void_ok,
4664 unsigned int length,
4665 TRAPS) const {
4666 unsigned int array_dim = 0;
4667 while (length > 0) {
4668 switch (signature[0]) {
4669 case JVM_SIGNATURE_VOID: if (!void_ok) { return nullptr; }
4670 case JVM_SIGNATURE_BOOLEAN:
4671 case JVM_SIGNATURE_BYTE:
4672 case JVM_SIGNATURE_CHAR:
4673 case JVM_SIGNATURE_SHORT:
4674 case JVM_SIGNATURE_INT:
4675 case JVM_SIGNATURE_FLOAT:
4676 case JVM_SIGNATURE_LONG:
4677 case JVM_SIGNATURE_DOUBLE:
4678 return signature + 1;
4679 case JVM_SIGNATURE_CLASS: {
4680 if (_major_version < JAVA_1_5_VERSION) {
4681 signature++;
4682 length--;
4683 // Skip over the class name if one is there
4684 const char* const p = skip_over_field_name(signature, true, length);
4685 assert(p == nullptr || p > signature, "must parse one character at least");
4686 // The next character better be a semicolon
4687 if (p != nullptr && // Parse of field name succeeded.
4688 p - signature < static_cast<int>(length) && // There is at least one character left to parse.
4689 p[0] == JVM_SIGNATURE_ENDCLASS) {
4690 return p + 1;
4691 }
4692 }
4693 else {
4694 // Skip leading 'L' and ignore first appearance of ';'
4695 signature++;
4696 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4697 // Format check signature
4698 if (c != nullptr) {
4699 int newlen = pointer_delta_as_int(c, (char*) signature);
4700 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4701 if (!legal) {
4702 classfile_parse_error("Class name is empty or contains illegal character "
4703 "in descriptor in class file %s",
4704 THREAD);
4705 return nullptr;
4706 }
4707 return signature + newlen + 1;
4708 }
4709 }
4710 return nullptr;
4711 }
4712 case JVM_SIGNATURE_ARRAY:
4713 array_dim++;
4714 if (array_dim > 255) {
4730
4731 // Checks if name is a legal class name.
4732 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4733 if (!_need_verify) { return; }
4734
4735 assert(name->refcount() > 0, "symbol must be kept alive");
4736 char* bytes = (char*)name->bytes();
4737 unsigned int length = name->utf8_length();
4738 bool legal = false;
4739
4740 if (length > 0) {
4741 const char* p;
4742 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4743 p = skip_over_field_signature(bytes, false, length, CHECK);
4744 legal = (p != nullptr) && ((p - bytes) == (int)length);
4745 } else if (_major_version < JAVA_1_5_VERSION) {
4746 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4747 p = skip_over_field_name(bytes, true, length);
4748 legal = (p != nullptr) && ((p - bytes) == (int)length);
4749 }
4750 } else {
4751 // 4900761: relax the constraints based on JSR202 spec
4752 // Class names may be drawn from the entire Unicode character set.
4753 // Identifiers between '/' must be unqualified names.
4754 // The utf8 string has been verified when parsing cpool entries.
4755 legal = verify_unqualified_name(bytes, length, LegalClass);
4756 }
4757 }
4758 if (!legal) {
4759 ResourceMark rm(THREAD);
4760 assert(_class_name != nullptr, "invariant");
4761 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4762 Exceptions::fthrow(
4763 THREAD_AND_LOCATION,
4764 vmSymbols::java_lang_ClassFormatError(),
4765 "Illegal class name \"%.*s\" in class file %s", length, bytes,
4766 _class_name->as_C_string()
4767 );
4768 return;
4769 }
4797 THREAD_AND_LOCATION,
4798 vmSymbols::java_lang_ClassFormatError(),
4799 "Illegal field name \"%.*s\" in class %s", length, bytes,
4800 _class_name->as_C_string()
4801 );
4802 return;
4803 }
4804 }
4805
4806 // Checks if name is a legal method name.
4807 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4808 if (!_need_verify) { return; }
4809
4810 assert(name != nullptr, "method name is null");
4811 char* bytes = (char*)name->bytes();
4812 unsigned int length = name->utf8_length();
4813 bool legal = false;
4814
4815 if (length > 0) {
4816 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
4817 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4818 legal = true;
4819 }
4820 } else if (_major_version < JAVA_1_5_VERSION) {
4821 const char* p;
4822 p = skip_over_field_name(bytes, false, length);
4823 legal = (p != nullptr) && ((p - bytes) == (int)length);
4824 } else {
4825 // 4881221: relax the constraints based on JSR202 spec
4826 legal = verify_unqualified_name(bytes, length, LegalMethod);
4827 }
4828 }
4829
4830 if (!legal) {
4831 ResourceMark rm(THREAD);
4832 assert(_class_name != nullptr, "invariant");
4833 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4834 Exceptions::fthrow(
4835 THREAD_AND_LOCATION,
4836 vmSymbols::java_lang_ClassFormatError(),
4837 "Illegal method name \"%.*s\" in class %s", length, bytes,
4838 _class_name->as_C_string()
4839 );
4840 return;
4841 }
4842 }
4843
4844
4845 // Checks if signature is a legal field signature.
4846 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
4847 const Symbol* signature,
4848 TRAPS) const {
4849 if (!_need_verify) { return; }
4850
4851 const char* const bytes = (const char*)signature->bytes();
4852 const unsigned int length = signature->utf8_length();
4853 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
4854
4855 if (p == nullptr || (p - bytes) != (int)length) {
4856 throwIllegalSignature("Field", name, signature, CHECK);
4857 }
4858 }
4859
4860 // Check that the signature is compatible with the method name. For example,
4861 // check that <init> has a void signature.
4862 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
4863 const Symbol* signature,
4864 TRAPS) const {
4865 if (!_need_verify) {
4866 return;
4867 }
4868
4869 // Class initializers cannot have args for class format version >= 51.
4870 if (name == vmSymbols::class_initializer_name() &&
4871 signature != vmSymbols::void_method_signature() &&
4872 _major_version >= JAVA_7_VERSION) {
4873 throwIllegalSignature("Method", name, signature, THREAD);
4874 return;
4875 }
4876
4877 int sig_length = signature->utf8_length();
4878 if (name->utf8_length() > 0 &&
4879 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
4880 sig_length > 0 &&
4881 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
4882 throwIllegalSignature("Method", name, signature, THREAD);
4883 }
4884 }
4885
4886 // Checks if signature is a legal method signature.
4887 // Returns number of parameters
4888 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
4889 const Symbol* signature,
4890 TRAPS) const {
4891 if (!_need_verify) {
4892 // make sure caller's args_size will be less than 0 even for non-static
4893 // method so it will be recomputed in compute_size_of_parameters().
4894 return -2;
4895 }
4896
4897 unsigned int args_size = 0;
4898 const char* p = (const char*)signature->bytes();
4899 unsigned int length = signature->utf8_length();
4900 const char* nextp;
4901
4912 length -= pointer_delta_as_int(nextp, p);
4913 p = nextp;
4914 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4915 }
4916 // The first non-signature thing better be a ')'
4917 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4918 length--;
4919 // Now we better just have a return value
4920 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4921 if (nextp && ((int)length == (nextp - p))) {
4922 return args_size;
4923 }
4924 }
4925 }
4926 // Report error
4927 throwIllegalSignature("Method", name, signature, THREAD);
4928 return 0;
4929 }
4930
4931 int ClassFileParser::static_field_size() const {
4932 assert(_field_info != nullptr, "invariant");
4933 return _field_info->_static_field_size;
4934 }
4935
4936 int ClassFileParser::total_oop_map_count() const {
4937 assert(_field_info != nullptr, "invariant");
4938 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
4939 }
4940
4941 jint ClassFileParser::layout_size() const {
4942 assert(_field_info != nullptr, "invariant");
4943 return _field_info->_instance_size;
4944 }
4945
4946 static void check_methods_for_intrinsics(const InstanceKlass* ik,
4947 const Array<Method*>* methods) {
4948 assert(ik != nullptr, "invariant");
4949 assert(methods != nullptr, "invariant");
4950
4951 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4952 // (We used to do this lazily, but now we query it in Rewriter,
4953 // which is eagerly done for every method, so we might as well do it now,
4954 // when everything is fresh in memory.)
4955 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
4956
4957 if (klass_id != vmSymbolID::NO_SID) {
4958 for (int j = 0; j < methods->length(); ++j) {
4959 Method* method = methods->at(j);
4960 method->init_intrinsic_id(klass_id);
4961
4962 if (CheckIntrinsics) {
4963 // Check if an intrinsic is defined for method 'method',
5038 }
5039 }
5040
5041 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5042 const ClassInstanceInfo& cl_inst_info,
5043 TRAPS) {
5044 if (_klass != nullptr) {
5045 return _klass;
5046 }
5047
5048 InstanceKlass* const ik =
5049 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5050
5051 if (is_hidden()) {
5052 mangle_hidden_class_name(ik);
5053 }
5054
5055 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5056
5057 assert(_klass == ik, "invariant");
5058
5059 return ik;
5060 }
5061
5062 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5063 bool changed_by_loadhook,
5064 const ClassInstanceInfo& cl_inst_info,
5065 TRAPS) {
5066 assert(ik != nullptr, "invariant");
5067
5068 // Set name and CLD before adding to CLD
5069 ik->set_class_loader_data(_loader_data);
5070 ik->set_class_loader_type();
5071 ik->set_name(_class_name);
5072
5073 // Add all classes to our internal class loader list here,
5074 // including classes in the bootstrap (null) class loader.
5075 const bool publicize = !is_internal();
5076
5077 _loader_data->add_class(ik, publicize);
5078
5079 set_klass_to_deallocate(ik);
5080
5081 assert(_field_info != nullptr, "invariant");
5082 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5083 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5084 "sanity");
5085
5086 assert(ik->is_instance_klass(), "sanity");
5087 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5088
5089 // Fill in information already parsed
5090 ik->set_should_verify_class(_need_verify);
5091
5092 // Not yet: supers are done below to support the new subtype-checking fields
5093 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5094 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5095 ik->set_static_oop_field_count(_static_oop_count);
5096
5097 // this transfers ownership of a lot of arrays from
5098 // the parser onto the InstanceKlass*
5099 apply_parsed_class_metadata(ik, _java_fields_count);
5100
5101 // can only set dynamic nest-host after static nest information is set
5102 if (cl_inst_info.dynamic_nest_host() != nullptr) {
5103 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5104 }
5105
5106 // note that is not safe to use the fields in the parser from this point on
5107 assert(nullptr == _cp, "invariant");
5108 assert(nullptr == _fieldinfo_stream, "invariant");
5109 assert(nullptr == _fieldinfo_search_table, "invariant");
5110 assert(nullptr == _fields_status, "invariant");
5111 assert(nullptr == _methods, "invariant");
5112 assert(nullptr == _inner_classes, "invariant");
5113 assert(nullptr == _nest_members, "invariant");
5114 assert(nullptr == _combined_annotations, "invariant");
5115 assert(nullptr == _record_components, "invariant");
5116 assert(nullptr == _permitted_subclasses, "invariant");
5117
5118 if (_has_localvariable_table) {
5119 ik->set_has_localvariable_table(true);
5120 }
5121
5122 if (_has_final_method) {
5123 ik->set_has_final_method();
5124 }
5125
5126 ik->copy_method_ordering(_method_ordering, CHECK);
5127 // The InstanceKlass::_methods_jmethod_ids cache
5128 // is managed on the assumption that the initial cache
5129 // size is equal to the number of methods in the class. If
5130 // that changes, then InstanceKlass::idnum_can_increment()
5131 // has to be changed accordingly.
5132 ik->set_initial_method_idnum(checked_cast<u2>(ik->methods()->length()));
5133
5134 ik->set_this_class_index(_this_class_index);
5135
5136 if (_is_hidden) {
5173 if ((_num_miranda_methods > 0) ||
5174 // if this class introduced new miranda methods or
5175 (_super_klass != nullptr && _super_klass->has_miranda_methods())
5176 // super class exists and this class inherited miranda methods
5177 ) {
5178 ik->set_has_miranda_methods(); // then set a flag
5179 }
5180
5181 // Fill in information needed to compute superclasses.
5182 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5183 ik->set_transitive_interfaces(_transitive_interfaces);
5184 ik->set_local_interfaces(_local_interfaces);
5185 _transitive_interfaces = nullptr;
5186 _local_interfaces = nullptr;
5187
5188 // Initialize itable offset tables
5189 klassItable::setup_itable_offset_table(ik);
5190
5191 // Compute transitive closure of interfaces this class implements
5192 // Do final class setup
5193 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5194 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5195 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5196 }
5197
5198 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5199 ( _super_klass != nullptr && _super_klass->has_contended_annotations())) {
5200 ik->set_has_contended_annotations(true);
5201 }
5202
5203 // Fill in has_finalizer and layout_helper
5204 set_precomputed_flags(ik);
5205
5206 // check if this class can access its super class
5207 check_super_class_access(ik, CHECK);
5208
5209 // check if this class can access its superinterfaces
5210 check_super_interface_access(ik, CHECK);
5211
5212 // check if this class overrides any final method
5213 check_final_method_override(ik, CHECK);
5234
5235 assert(_all_mirandas != nullptr, "invariant");
5236
5237 // Generate any default methods - default methods are public interface methods
5238 // that have a default implementation. This is new with Java 8.
5239 if (_has_nonstatic_concrete_methods) {
5240 DefaultMethods::generate_default_methods(ik,
5241 _all_mirandas,
5242 CHECK);
5243 }
5244
5245 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5246 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5247 !module_entry->has_default_read_edges()) {
5248 if (!module_entry->set_has_default_read_edges()) {
5249 // We won a potential race
5250 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5251 }
5252 }
5253
5254 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5255
5256 if (!is_internal()) {
5257 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5258
5259 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5260 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5261 log_is_enabled(Info, class, preview)) {
5262 ResourceMark rm;
5263 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5264 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5265 }
5266
5267 if (log_is_enabled(Debug, class, resolve)) {
5268 ResourceMark rm;
5269 // print out the superclass.
5270 const char * from = ik->external_name();
5271 if (ik->super() != nullptr) {
5272 log_debug(class, resolve)("%s %s (super)",
5273 from,
5316 const ClassLoadInfo* cl_info,
5317 Publicity pub_level,
5318 TRAPS) :
5319 _stream(stream),
5320 _class_name(nullptr),
5321 _loader_data(loader_data),
5322 _is_hidden(cl_info->is_hidden()),
5323 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5324 _orig_cp_size(0),
5325 _static_oop_count(0),
5326 _super_klass(),
5327 _cp(nullptr),
5328 _fieldinfo_stream(nullptr),
5329 _fieldinfo_search_table(nullptr),
5330 _fields_status(nullptr),
5331 _methods(nullptr),
5332 _inner_classes(nullptr),
5333 _nest_members(nullptr),
5334 _nest_host(0),
5335 _permitted_subclasses(nullptr),
5336 _record_components(nullptr),
5337 _local_interfaces(nullptr),
5338 _transitive_interfaces(nullptr),
5339 _combined_annotations(nullptr),
5340 _class_annotations(nullptr),
5341 _class_type_annotations(nullptr),
5342 _fields_annotations(nullptr),
5343 _fields_type_annotations(nullptr),
5344 _klass(nullptr),
5345 _klass_to_deallocate(nullptr),
5346 _parsed_annotations(nullptr),
5347 _field_info(nullptr),
5348 _temp_field_info(nullptr),
5349 _method_ordering(nullptr),
5350 _all_mirandas(nullptr),
5351 _vtable_size(0),
5352 _itable_size(0),
5353 _num_miranda_methods(0),
5354 _protection_domain(cl_info->protection_domain()),
5355 _access_flags(),
5356 _pub_level(pub_level),
5357 _bad_constant_seen(0),
5358 _synthetic_flag(false),
5359 _sde_length(false),
5360 _sde_buffer(nullptr),
5361 _sourcefile_index(0),
5362 _generic_signature_index(0),
5363 _major_version(0),
5364 _minor_version(0),
5365 _this_class_index(0),
5366 _super_class_index(0),
5367 _itfs_len(0),
5368 _java_fields_count(0),
5369 _need_verify(false),
5370 _has_nonstatic_concrete_methods(false),
5371 _declares_nonstatic_concrete_methods(false),
5372 _has_localvariable_table(false),
5373 _has_final_method(false),
5374 _has_contended_fields(false),
5375 _has_aot_runtime_setup_method(false),
5376 _has_finalizer(false),
5377 _has_empty_finalizer(false),
5378 _max_bootstrap_specifier_index(-1) {
5379
5380 _class_name = name != nullptr ? name : vmSymbols::unknown_class_name();
5381 _class_name->increment_refcount();
5382
5383 assert(_loader_data != nullptr, "invariant");
5384 assert(stream != nullptr, "invariant");
5385 assert(_stream != nullptr, "invariant");
5386 assert(_stream->buffer() == _stream->current(), "invariant");
5387 assert(_class_name != nullptr, "invariant");
5388 assert(0 == _access_flags.as_unsigned_short(), "invariant");
5389
5390 // Figure out whether we can skip format checking (matching classic VM behavior)
5391 // Always verify CFLH bytes from the user agents.
5392 _need_verify = stream->from_class_file_load_hook() ? true : Verifier::should_verify_for(_loader_data->class_loader());
5393
5394 // synch back verification state to stream to check for truncation.
5395 stream->set_need_verify(_need_verify);
5396
5397 parse_stream(stream, CHECK);
5398
5399 post_process_parsed_stream(stream, _cp, CHECK);
5400 }
5401
5402 void ClassFileParser::clear_class_metadata() {
5403 // metadata created before the instance klass is created. Must be
5404 // deallocated if classfile parsing returns an error.
5405 _cp = nullptr;
5406 _fieldinfo_stream = nullptr;
5407 _fieldinfo_search_table = nullptr;
5408 _fields_status = nullptr;
5409 _methods = nullptr;
5410 _inner_classes = nullptr;
5411 _nest_members = nullptr;
5412 _permitted_subclasses = nullptr;
5413 _combined_annotations = nullptr;
5414 _class_annotations = _class_type_annotations = nullptr;
5415 _fields_annotations = _fields_type_annotations = nullptr;
5416 _record_components = nullptr;
5417 }
5418
5419 // Destructor to clean up
5420 ClassFileParser::~ClassFileParser() {
5421 _class_name->decrement_refcount();
5422
5423 if (_cp != nullptr) {
5424 MetadataFactory::free_metadata(_loader_data, _cp);
5425 }
5426
5427 if (_fieldinfo_stream != nullptr) {
5428 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_stream);
5429 }
5430 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_search_table);
5431
5432 if (_fields_status != nullptr) {
5433 MetadataFactory::free_array<FieldStatus>(_loader_data, _fields_status);
5434 }
5435
5436 if (_methods != nullptr) {
5437 // Free methods
5438 InstanceKlass::deallocate_methods(_loader_data, _methods);
5439 }
5440
5441 // beware of the Universe::empty_blah_array!!
5442 if (_inner_classes != nullptr && _inner_classes != Universe::the_empty_short_array()) {
5443 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5444 }
5445
5446 if (_nest_members != nullptr && _nest_members != Universe::the_empty_short_array()) {
5447 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5448 }
5449
5450 if (_record_components != nullptr) {
5451 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5452 }
5453
5454 if (_permitted_subclasses != nullptr && _permitted_subclasses != Universe::the_empty_short_array()) {
5455 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5456 }
5457
5458 // Free interfaces
5459 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5460 _local_interfaces, _transitive_interfaces);
5461
5462 if (_combined_annotations != nullptr) {
5463 // After all annotations arrays have been created, they are installed into the
5464 // Annotations object that will be assigned to the InstanceKlass being created.
5465
5466 // Deallocate the Annotations object and the installed annotations arrays.
5467 _combined_annotations->deallocate_contents(_loader_data);
5468
5469 // If the _combined_annotations pointer is non-null,
5470 // then the other annotations fields should have been cleared.
5471 assert(_class_annotations == nullptr, "Should have been cleared");
5472 assert(_class_type_annotations == nullptr, "Should have been cleared");
5473 assert(_fields_annotations == nullptr, "Should have been cleared");
5474 assert(_fields_type_annotations == nullptr, "Should have been cleared");
5475 } else {
5476 // If the annotations arrays were not installed into the Annotations object,
5477 // then they have to be deallocated explicitly.
5536
5537 assert(cp_size == (u2)cp->length(), "invariant");
5538
5539 // ACCESS FLAGS
5540 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5541
5542 // Access flags
5543 u2 flags;
5544 // JVM_ACC_MODULE is defined in JDK-9 and later.
5545 if (_major_version >= JAVA_9_VERSION) {
5546 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5547 } else {
5548 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5549 }
5550
5551 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5552 // Set abstract bit for old class files for backward compatibility
5553 flags |= JVM_ACC_ABSTRACT;
5554 }
5555
5556 verify_legal_class_modifiers(flags, nullptr, false, CHECK);
5557
5558 short bad_constant = class_bad_constant_seen();
5559 if (bad_constant != 0) {
5560 // Do not throw CFE until after the access_flags are checked because if
5561 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5562 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5563 return;
5564 }
5565
5566 _access_flags.set_flags(flags);
5567
5568 // This class and superclass
5569 _this_class_index = stream->get_u2_fast();
5570 guarantee_property(
5571 valid_cp_range(_this_class_index, cp_size) &&
5572 cp->tag_at(_this_class_index).is_unresolved_klass(),
5573 "Invalid this class index %u in constant pool in class file %s",
5574 _this_class_index, CHECK);
5575
5639 }
5640 ls.cr();
5641 }
5642 }
5643
5644 // SUPERKLASS
5645 _super_class_index = stream->get_u2_fast();
5646 check_super_class(cp,
5647 _super_class_index,
5648 _need_verify,
5649 CHECK);
5650
5651 // Interfaces
5652 _itfs_len = stream->get_u2_fast();
5653 parse_interfaces(stream,
5654 _itfs_len,
5655 cp,
5656 &_has_nonstatic_concrete_methods,
5657 CHECK);
5658
5659 assert(_local_interfaces != nullptr, "invariant");
5660
5661 // Fields (offsets are filled in later)
5662 parse_fields(stream,
5663 _access_flags.is_interface(),
5664 cp,
5665 cp_size,
5666 &_java_fields_count,
5667 CHECK);
5668
5669 assert(_temp_field_info != nullptr, "invariant");
5670
5671 // Methods
5672 parse_methods(stream,
5673 _access_flags.is_interface(),
5674 &_has_localvariable_table,
5675 &_has_final_method,
5676 &_declares_nonstatic_concrete_methods,
5677 CHECK);
5678
5679 assert(_methods != nullptr, "invariant");
5680
5681 if (_declares_nonstatic_concrete_methods) {
5682 _has_nonstatic_concrete_methods = true;
5683 }
5684
5685 // Additional attributes/annotations
5686 _parsed_annotations = new ClassAnnotationCollector();
5687 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5688
5689 assert(_inner_classes != nullptr, "invariant");
5690
5691 // Finalize the Annotations metadata object,
5692 // now that all annotation arrays have been created.
5693 create_combined_annotations(CHECK);
5741 }
5742
5743 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5744 ConstantPool* cp,
5745 TRAPS) {
5746 assert(stream != nullptr, "invariant");
5747 assert(stream->at_eos(), "invariant");
5748 assert(cp != nullptr, "invariant");
5749 assert(_loader_data != nullptr, "invariant");
5750
5751 if (_class_name == vmSymbols::java_lang_Object()) {
5752 precond(_super_class_index == 0);
5753 precond(_super_klass == nullptr);
5754 guarantee_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
5755 "java.lang.Object cannot implement an interface in class file %s",
5756 CHECK);
5757 } else {
5758 // Set _super_klass after class file is parsed and format is checked
5759 assert(_super_class_index > 0, "any class other than Object must have a super class");
5760 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5761 if (_access_flags.is_interface()) {
5762 // Before attempting to resolve the superclass, check for class format
5763 // errors not checked yet.
5764 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5765 "Interfaces must have java.lang.Object as superclass in class file %s",
5766 CHECK);
5767 }
5768 Handle loader(THREAD, _loader_data->class_loader());
5769 if (loader.is_null() && super_class_name == vmSymbols::java_lang_Object()) {
5770 // fast path to avoid lookup
5771 _super_klass = vmClasses::Object_klass();
5772 } else {
5773 _super_klass = (const InstanceKlass*)
5774 SystemDictionary::resolve_super_or_fail(_class_name,
5775 super_class_name,
5776 loader,
5777 true,
5778 CHECK);
5779 }
5780 }
5781
5782 if (_super_klass != nullptr) {
5783 if (_super_klass->has_nonstatic_concrete_methods()) {
5784 _has_nonstatic_concrete_methods = true;
5785 }
5786
5787 if (_super_klass->is_interface()) {
5788 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
5789 return;
5790 }
5791 }
5792
5793 // Compute the transitive list of all unique interfaces implemented by this class
5794 _transitive_interfaces =
5795 compute_transitive_interfaces(_super_klass,
5796 _local_interfaces,
5797 _loader_data,
5798 CHECK);
5799
5800 assert(_transitive_interfaces != nullptr, "invariant");
5801
5802 // sort methods
5803 _method_ordering = sort_methods(_methods);
5804
5805 _all_mirandas = new GrowableArray<Method*>(20);
5806
5807 Handle loader(THREAD, _loader_data->class_loader());
5808 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5809 &_num_miranda_methods,
5810 _all_mirandas,
5811 _super_klass,
5812 _methods,
5813 _access_flags,
5814 _major_version,
5815 loader,
5816 _class_name,
5817 _local_interfaces);
5818
5819 // Size of Java itable (in words)
5820 _itable_size = _access_flags.is_interface() ? 0 :
5821 klassItable::compute_itable_size(_transitive_interfaces);
5822
5823 assert(_parsed_annotations != nullptr, "invariant");
5824
5825 _field_info = new FieldLayoutInfo();
5826 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, /*_fields*/ _temp_field_info,
5827 _parsed_annotations->is_contended(), _field_info);
5828 lb.build_layout();
5829
5830 int injected_fields_count = _temp_field_info->length() - _java_fields_count;
5831 _fieldinfo_stream =
5832 FieldInfoStream::create_FieldInfoStream(_temp_field_info, _java_fields_count,
5833 injected_fields_count, loader_data(), CHECK);
5834 _fieldinfo_search_table = FieldInfoStream::create_search_table(_cp, _fieldinfo_stream, _loader_data, CHECK);
5835 _fields_status =
5836 MetadataFactory::new_array<FieldStatus>(_loader_data, _temp_field_info->length(),
5837 FieldStatus(0), CHECK);
5838 }
5839
5840 void ClassFileParser::set_klass(InstanceKlass* klass) {
5841
5842 #ifdef ASSERT
5843 if (klass != nullptr) {
5844 assert(nullptr == _klass, "leaking?");
5845 }
5846 #endif
5847
5848 _klass = klass;
5849 }
5850
5851 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5852
5853 #ifdef ASSERT
5854 if (klass != nullptr) {
5855 assert(nullptr == _klass_to_deallocate, "leaking?");
5856 }
5857 #endif
|
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/cdsConfig.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/classLoadInfo.hpp"
31 #include "classfile/defaultMethods.hpp"
32 #include "classfile/fieldLayoutBuilder.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/moduleEntry.hpp"
35 #include "classfile/packageEntry.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/verificationType.hpp"
39 #include "classfile/verifier.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "jvm.h"
43 #include "logging/log.hpp"
44 #include "logging/logStream.hpp"
45 #include "memory/allocation.hpp"
46 #include "memory/metadataFactory.hpp"
47 #include "memory/oopFactory.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "memory/universe.hpp"
50 #include "oops/annotations.hpp"
51 #include "oops/constantPool.inline.hpp"
52 #include "oops/fieldInfo.hpp"
53 #include "oops/fieldStreams.inline.hpp"
54 #include "oops/inlineKlass.inline.hpp"
55 #include "oops/instanceKlass.inline.hpp"
56 #include "oops/instanceMirrorKlass.hpp"
57 #include "oops/klass.inline.hpp"
58 #include "oops/klassVtable.hpp"
59 #include "oops/metadata.hpp"
60 #include "oops/method.inline.hpp"
61 #include "oops/oop.inline.hpp"
62 #include "oops/recordComponent.hpp"
63 #include "oops/symbol.hpp"
64 #include "prims/jvmtiExport.hpp"
65 #include "prims/jvmtiThreadState.hpp"
66 #include "runtime/arguments.hpp"
67 #include "runtime/fieldDescriptor.inline.hpp"
68 #include "runtime/handles.inline.hpp"
69 #include "runtime/javaCalls.hpp"
70 #include "runtime/os.hpp"
71 #include "runtime/perfData.hpp"
72 #include "runtime/reflection.hpp"
73 #include "runtime/safepointVerifiers.hpp"
74 #include "runtime/signature.hpp"
75 #include "runtime/timer.hpp"
76 #include "services/classLoadingService.hpp"
77 #include "services/threadService.hpp"
78 #include "utilities/align.hpp"
79 #include "utilities/bitMap.inline.hpp"
80 #include "utilities/checkedCast.hpp"
81 #include "utilities/copy.hpp"
82 #include "utilities/exceptions.hpp"
83 #include "utilities/formatBuffer.hpp"
84 #include "utilities/globalDefinitions.hpp"
85 #include "utilities/growableArray.hpp"
86 #include "utilities/hashTable.hpp"
87 #include "utilities/macros.hpp"
88 #include "utilities/ostream.hpp"
89 #include "utilities/stringUtils.hpp"
90 #include "utilities/utf8.hpp"
91 #if INCLUDE_CDS
92 #include "classfile/systemDictionaryShared.hpp"
93 #endif
94 #if INCLUDE_JFR
95 #include "jfr/support/jfrTraceIdExtension.hpp"
96 #endif
97
98 // We generally try to create the oops directly when parsing, rather than
99 // allocating temporary data structures and copying the bytes twice. A
100 // temporary area is only needed when parsing utf8 entries in the constant
101 // pool and when parsing line number tables.
102
103 // We add assert in debug mode when class format is not checked.
104
105 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
106 #define JAVA_MIN_SUPPORTED_VERSION 45
107 #define JAVA_PREVIEW_MINOR_VERSION 65535
108
109 // Used for two backward compatibility reasons:
142 #define JAVA_17_VERSION 61
143
144 #define JAVA_18_VERSION 62
145
146 #define JAVA_19_VERSION 63
147
148 #define JAVA_20_VERSION 64
149
150 #define JAVA_21_VERSION 65
151
152 #define JAVA_22_VERSION 66
153
154 #define JAVA_23_VERSION 67
155
156 #define JAVA_24_VERSION 68
157
158 #define JAVA_25_VERSION 69
159
160 #define JAVA_26_VERSION 70
161
162 #define CONSTANT_CLASS_DESCRIPTORS 70
163
164 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
165 assert((bad_constant == JVM_CONSTANT_Module ||
166 bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
167 "Unexpected bad constant pool entry");
168 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
169 }
170
171 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
172 ConstantPool* cp,
173 const int length,
174 TRAPS) {
175 assert(stream != nullptr, "invariant");
176 assert(cp != nullptr, "invariant");
177
178 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
179 // this function (_current can be allocated in a register, with scalar
180 // replacement of aggregates). The _current pointer is copied back to
181 // stream() when this function returns. DON'T call another method within
182 // this method that uses stream().
183 const ClassFileStream cfs1 = *stream;
184 const ClassFileStream* const cfs = &cfs1;
185
186 DEBUG_ONLY(const u1* const old_current = stream->current();)
187
188 // Used for batching symbol allocations.
189 const char* names[SymbolTable::symbol_alloc_batch_size];
190 int lengths[SymbolTable::symbol_alloc_batch_size];
191 int indices[SymbolTable::symbol_alloc_batch_size];
192 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
193 int names_count = 0;
194
195 // parsing Index 0 is unused
196 for (int index = 1; index < length; index++) {
197 // Each of the following case guarantees one more byte in the stream
198 // for the following tag or the access_flags following constant pool,
199 // so we don't need bounds-check for reading tag.
200 const u1 tag = cfs->get_u1_fast();
201 switch (tag) {
202 case JVM_CONSTANT_Class: {
203 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
204 const u2 name_index = cfs->get_u2_fast();
205 cp->klass_index_at_put(index, name_index);
206 break;
207 }
208 case JVM_CONSTANT_Fieldref: {
209 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
210 const u2 class_index = cfs->get_u2_fast();
211 const u2 name_and_type_index = cfs->get_u2_fast();
212 cp->field_at_put(index, class_index, name_and_type_index);
213 break;
214 }
215 case JVM_CONSTANT_Methodref: {
216 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
217 const u2 class_index = cfs->get_u2_fast();
218 const u2 name_and_type_index = cfs->get_u2_fast();
219 cp->method_at_put(index, class_index, name_and_type_index);
220 break;
221 }
222 case JVM_CONSTANT_InterfaceMethodref: {
486 guarantee_property(valid_symbol_at(name_ref_index),
487 "Invalid constant pool index %u in class file %s",
488 name_ref_index, CHECK);
489 guarantee_property(valid_symbol_at(signature_ref_index),
490 "Invalid constant pool index %u in class file %s",
491 signature_ref_index, CHECK);
492 break;
493 }
494 case JVM_CONSTANT_Utf8:
495 break;
496 case JVM_CONSTANT_UnresolvedClass: // fall-through
497 case JVM_CONSTANT_UnresolvedClassInError: {
498 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
499 break;
500 }
501 case JVM_CONSTANT_ClassIndex: {
502 const int class_index = cp->klass_index_at(index);
503 guarantee_property(valid_symbol_at(class_index),
504 "Invalid constant pool index %u in class file %s",
505 class_index, CHECK);
506
507 Symbol* const name = cp->symbol_at(class_index);
508 const unsigned int name_len = name->utf8_length();
509 cp->unresolved_klass_at_put(index, class_index, num_klasses++);
510 break;
511 }
512 case JVM_CONSTANT_StringIndex: {
513 const int string_index = cp->string_index_at(index);
514 guarantee_property(valid_symbol_at(string_index),
515 "Invalid constant pool index %u in class file %s",
516 string_index, CHECK);
517 Symbol* const sym = cp->symbol_at(string_index);
518 cp->unresolved_string_at_put(index, sym);
519 break;
520 }
521 case JVM_CONSTANT_MethodHandle: {
522 const int ref_index = cp->method_handle_index_at(index);
523 guarantee_property(valid_cp_range(ref_index, length),
524 "Invalid constant pool index %u in class file %s",
525 ref_index, CHECK);
526 const constantTag tag = cp->tag_at(ref_index);
527 const int ref_kind = cp->method_handle_ref_kind_at(index);
528
698 }
699 }
700 } else {
701 if (_need_verify) {
702 // Method name and signature are individually verified above, when iterating
703 // NameAndType_info. Need to check here that signature is non-zero length and
704 // the right type.
705 if (!Signature::is_method(signature)) {
706 throwIllegalSignature("Method", name, signature, CHECK);
707 }
708 }
709 // If a class method name begins with '<', it must be "<init>" and have void signature.
710 const unsigned int name_len = name->utf8_length();
711 if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
712 name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
713 if (name != vmSymbols::object_initializer_name()) {
714 classfile_parse_error(
715 "Bad method name at constant pool index %u in class file %s",
716 name_ref_index, THREAD);
717 return;
718 } else if (!Signature::is_void_method(signature)) { // must have void signature.
719 throwIllegalSignature("Method", name, signature, CHECK);
720 }
721 }
722 }
723 break;
724 }
725 case JVM_CONSTANT_MethodHandle: {
726 const int ref_index = cp->method_handle_index_at(index);
727 const int ref_kind = cp->method_handle_ref_kind_at(index);
728 switch (ref_kind) {
729 case JVM_REF_invokeVirtual:
730 case JVM_REF_invokeStatic:
731 case JVM_REF_invokeSpecial:
732 case JVM_REF_newInvokeSpecial: {
733 const int name_and_type_ref_index =
734 cp->uncached_name_and_type_ref_index_at(ref_index);
735 const int name_ref_index =
736 cp->name_ref_index_at(name_and_type_ref_index);
737 const Symbol* const name = cp->symbol_at(name_ref_index);
738
739 if (name != vmSymbols::object_initializer_name()) { // !<init>
740 if (ref_kind == JVM_REF_newInvokeSpecial) {
741 classfile_parse_error(
742 "Bad constructor name at constant pool index %u in class file %s",
743 name_ref_index, THREAD);
744 return;
745 }
746 } else { // <init>
747 // The allowed invocation mode of <init> depends on its signature.
748 // This test corresponds to verify_invoke_instructions in the verifier.
749 const int signature_ref_index =
750 cp->signature_ref_index_at(name_and_type_ref_index);
751 const Symbol* const signature = cp->symbol_at(signature_ref_index);
752 if (signature->is_void_method_signature()
753 && ref_kind == JVM_REF_newInvokeSpecial) {
754 // OK, could be a constructor call
755 } else {
756 classfile_parse_error(
757 "Bad method name at constant pool index %u in class file %s",
758 name_ref_index, THREAD);
759 return;
760 }
761 }
762 break;
763 }
764 // Other ref_kinds are already fully checked in previous pass.
765 } // switch(ref_kind)
766 break;
767 }
768 case JVM_CONSTANT_MethodType: {
769 const Symbol* const no_name = vmSymbols::type_name(); // place holder
770 const Symbol* const signature = cp->method_type_signature_at(index);
771 verify_legal_method_signature(no_name, signature, CHECK);
772 break;
773 }
774 case JVM_CONSTANT_Utf8: {
775 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
787
788 NameSigHash(Symbol* name, Symbol* sig) :
789 _name(name),
790 _sig(sig) {}
791
792 static unsigned int hash(NameSigHash const& namesig) {
793 return namesig._name->identity_hash() ^ namesig._sig->identity_hash();
794 }
795
796 static bool equals(NameSigHash const& e0, NameSigHash const& e1) {
797 return (e0._name == e1._name) &&
798 (e0._sig == e1._sig);
799 }
800 };
801
802 using NameSigHashtable = HashTable<NameSigHash, int,
803 NameSigHash::HASH_ROW_SIZE,
804 AnyObj::RESOURCE_AREA, mtInternal,
805 &NameSigHash::hash, &NameSigHash::equals>;
806
807 static void check_identity_and_value_modifiers(ClassFileParser* current, const InstanceKlass* super_type, TRAPS) {
808 assert(super_type != nullptr,"Method doesn't support null super type");
809 if (super_type->access_flags().is_identity_class() && !current->access_flags().is_identity_class()
810 && super_type->name() != vmSymbols::java_lang_Object()) {
811 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
812 err_msg("Value type %s has an identity type as supertype",
813 current->class_name()->as_klass_external_name()));
814 }
815 }
816
817 void ClassFileParser::parse_interfaces(const ClassFileStream* stream,
818 int itfs_len,
819 ConstantPool* cp,
820 bool* const has_nonstatic_concrete_methods,
821 // FIXME: lots of these functions
822 // declare their parameters as const,
823 // which adds only noise to the code.
824 // Remove the spurious const modifiers.
825 // Many are of the form "const int x"
826 // or "T* const x".
827 TRAPS) {
828 assert(stream != nullptr, "invariant");
829 assert(cp != nullptr, "invariant");
830 assert(has_nonstatic_concrete_methods != nullptr, "invariant");
831
832 if (itfs_len == 0) {
833 _local_interfaces = Universe::the_empty_instance_klass_array();
834
835 } else {
836 assert(itfs_len > 0, "only called for len>0");
837 _local_interface_indexes = new GrowableArray<u2>(itfs_len);
838 int index = 0;
839 for (index = 0; index < itfs_len; index++) {
840 const u2 interface_index = stream->get_u2(CHECK);
841 guarantee_property(
842 valid_klass_reference_at(interface_index),
843 "Interface name has bad constant pool index %u in class file %s",
844 interface_index, CHECK);
845 _local_interface_indexes->at_put_grow(index, interface_index);
846 }
847
848 if (!_need_verify || itfs_len <= 1) {
849 return;
850 }
851
852 // Check if there's any duplicates in interfaces
853 ResourceMark rm(THREAD);
854 // Set containing interface names
855 HashTable<Symbol*, int>* interface_names = new HashTable<Symbol*, int>();
856 for (index = 0; index < itfs_len; index++) {
857 Symbol* interface_name = cp->klass_name_at(_local_interface_indexes->at(index));
858 // If no duplicates, add (name, nullptr) in hashtable interface_names.
859 if (!interface_names->put(interface_name, 0)) {
860 classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
861 interface_name->as_C_string(), THREAD);
862 return;
863 }
864 }
865 }
866 }
867
868 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
869 int constantvalue_index,
870 int signature_index,
871 TRAPS) const {
872 // Make sure the constant pool entry is of a type appropriate to this field
873 guarantee_property(
874 (constantvalue_index > 0 &&
875 constantvalue_index < cp->length()),
876 "Bad initial value index %u in ConstantValue attribute in class file %s",
877 constantvalue_index, CHECK);
924 class AnnotationCollector : public ResourceObj{
925 public:
926 enum Location { _in_field, _in_method, _in_class };
927 enum ID {
928 _unknown = 0,
929 _method_CallerSensitive,
930 _method_ForceInline,
931 _method_DontInline,
932 _method_ChangesCurrentThread,
933 _method_JvmtiHideEvents,
934 _method_JvmtiMountTransition,
935 _method_InjectedProfile,
936 _method_LambdaForm_Compiled,
937 _method_Hidden,
938 _method_Scoped,
939 _method_IntrinsicCandidate,
940 _jdk_internal_vm_annotation_Contended,
941 _field_Stable,
942 _jdk_internal_vm_annotation_ReservedStackAccess,
943 _jdk_internal_ValueBased,
944 _jdk_internal_LooselyConsistentValue,
945 _jdk_internal_NullRestricted,
946 _java_lang_Deprecated,
947 _java_lang_Deprecated_for_removal,
948 _jdk_internal_vm_annotation_AOTSafeClassInitializer,
949 _method_AOTRuntimeSetup,
950 _annotation_LIMIT
951 };
952 const Location _location;
953 int _annotations_present;
954 u2 _contended_group;
955
956 AnnotationCollector(Location location)
957 : _location(location), _annotations_present(0), _contended_group(0)
958 {
959 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
960 }
961 // If this annotation name has an ID, report it (or _none).
962 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name, bool can_access_vm_annotations);
963 // Set the annotation name:
964 void set_annotation(ID id) {
965 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1352 }
1353
1354 *constantvalue_index_addr = constantvalue_index;
1355 *is_synthetic_addr = is_synthetic;
1356 *generic_signature_index_addr = generic_signature_index;
1357 AnnotationArray* a = allocate_annotations(runtime_visible_annotations,
1358 runtime_visible_annotations_length,
1359 CHECK);
1360 parsed_annotations->set_field_annotations(a);
1361 a = allocate_annotations(runtime_visible_type_annotations,
1362 runtime_visible_type_annotations_length,
1363 CHECK);
1364 parsed_annotations->set_field_type_annotations(a);
1365 return;
1366 }
1367
1368
1369 // Side-effects: populates the _fields, _fields_annotations,
1370 // _fields_type_annotations fields
1371 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1372 AccessFlags class_access_flags,
1373 ConstantPool* cp,
1374 const int cp_size,
1375 u2* const java_fields_count_ptr,
1376 TRAPS) {
1377
1378 assert(cfs != nullptr, "invariant");
1379 assert(cp != nullptr, "invariant");
1380 assert(java_fields_count_ptr != nullptr, "invariant");
1381
1382 assert(nullptr == _fields_annotations, "invariant");
1383 assert(nullptr == _fields_type_annotations, "invariant");
1384
1385 bool is_inline_type = !class_access_flags.is_identity_class() && !class_access_flags.is_abstract();
1386 bool is_value_class = !class_access_flags.is_identity_class() && !class_access_flags.is_interface();
1387 cfs->guarantee_more(2, CHECK); // length
1388 const u2 length = cfs->get_u2_fast();
1389 *java_fields_count_ptr = length;
1390
1391 int num_injected = 0;
1392 const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1393 &num_injected);
1394
1395 // two more slots are required for inline classes:
1396 // one for the static field with a reference to the pre-allocated default value
1397 // one for the field the JVM injects when detecting an empty inline class
1398 const int total_fields = length + num_injected + (is_inline_type ? 2 : 0)
1399 + ((UseAltSubstitutabilityMethod && is_value_class) ? 1 : 0);
1400
1401 // Allocate a temporary resource array to collect field data.
1402 // After parsing all fields, data are stored in a UNSIGNED5 compressed stream.
1403 _temp_field_info = new GrowableArray<FieldInfo>(total_fields);
1404
1405 int instance_fields_count = 0;
1406 ResourceMark rm(THREAD);
1407 for (int n = 0; n < length; n++) {
1408 // access_flags, name_index, descriptor_index, attributes_count
1409 cfs->guarantee_more(8, CHECK);
1410
1411 jint recognized_modifiers = JVM_RECOGNIZED_FIELD_MODIFIERS;
1412 if (!supports_inline_types()) {
1413 recognized_modifiers &= ~JVM_ACC_STRICT;
1414 }
1415
1416 const jint flags = cfs->get_u2_fast() & recognized_modifiers;
1417 verify_legal_field_modifiers(flags, class_access_flags, CHECK);
1418 AccessFlags access_flags;
1419 access_flags.set_flags(flags);
1420 FieldInfo::FieldFlags fieldFlags(0);
1421
1422 const u2 name_index = cfs->get_u2_fast();
1423 guarantee_property(valid_symbol_at(name_index),
1424 "Invalid constant pool index %u for field name in class file %s",
1425 name_index, CHECK);
1426 const Symbol* const name = cp->symbol_at(name_index);
1427 verify_legal_field_name(name, CHECK);
1428
1429 const u2 signature_index = cfs->get_u2_fast();
1430 guarantee_property(valid_symbol_at(signature_index),
1431 "Invalid constant pool index %u for field signature in class file %s",
1432 signature_index, CHECK);
1433 const Symbol* const sig = cp->symbol_at(signature_index);
1434 verify_legal_field_signature(name, sig, CHECK);
1435 if (!access_flags.is_static()) instance_fields_count++;
1436
1437 u2 constantvalue_index = 0;
1438 bool is_synthetic = false;
1439 u2 generic_signature_index = 0;
1440 const bool is_static = access_flags.is_static();
1441 FieldAnnotationCollector parsed_annotations(_loader_data);
1442
1443 bool is_null_restricted = false;
1444
1445 const u2 attributes_count = cfs->get_u2_fast();
1446 if (attributes_count > 0) {
1447 parse_field_attributes(cfs,
1448 attributes_count,
1449 is_static,
1450 signature_index,
1451 &constantvalue_index,
1452 &is_synthetic,
1453 &generic_signature_index,
1454 &parsed_annotations,
1455 CHECK);
1456
1457 if (parsed_annotations.field_annotations() != nullptr) {
1458 if (_fields_annotations == nullptr) {
1459 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1460 _loader_data, length, nullptr,
1461 CHECK);
1462 }
1463 _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1464 if (parsed_annotations.has_annotation(AnnotationCollector::_jdk_internal_NullRestricted)) {
1465 if (!Signature::has_envelope(sig)) {
1466 Exceptions::fthrow(
1467 THREAD_AND_LOCATION,
1468 vmSymbols::java_lang_ClassFormatError(),
1469 "Illegal use of @jdk.internal.vm.annotation.NullRestricted annotation on field %s.%s with signature %s (primitive types can never be null)",
1470 class_name()->as_C_string(), name->as_C_string(), sig->as_C_string());
1471 }
1472 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
1473 if (!is_strict) {
1474 Exceptions::fthrow(
1475 THREAD_AND_LOCATION,
1476 vmSymbols::java_lang_ClassFormatError(),
1477 "Illegal use of @jdk.internal.vm.annotation.NullRestricted annotation on field %s.%s which doesn't have the @jdk.internal.vm.annotation.Strict annotation",
1478 class_name()->as_C_string(), name->as_C_string());
1479 }
1480 is_null_restricted = true;
1481 }
1482 parsed_annotations.set_field_annotations(nullptr);
1483 }
1484 if (parsed_annotations.field_type_annotations() != nullptr) {
1485 if (_fields_type_annotations == nullptr) {
1486 _fields_type_annotations =
1487 MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1488 length,
1489 nullptr,
1490 CHECK);
1491 }
1492 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1493 parsed_annotations.set_field_type_annotations(nullptr);
1494 }
1495
1496 if (is_synthetic) {
1497 access_flags.set_is_synthetic();
1498 }
1499 if (generic_signature_index != 0) {
1500 fieldFlags.update_generic(true);
1501 }
1502 }
1503
1504 if (is_null_restricted) {
1505 fieldFlags.update_null_free_inline_type(true);
1506 }
1507
1508 const BasicType type = cp->basic_type_for_signature_at(signature_index);
1509
1510 // Update number of static oop fields.
1511 if (is_static && is_reference_type(type)) {
1512 _static_oop_count++;
1513 }
1514
1515 FieldInfo fi(access_flags, name_index, signature_index, constantvalue_index, fieldFlags);
1516 fi.set_index(n);
1517 if (fieldFlags.is_generic()) {
1518 fi.set_generic_signature_index(generic_signature_index);
1519 }
1520 parsed_annotations.apply_to(&fi);
1521 if (fi.field_flags().is_contended()) {
1522 _has_contended_fields = true;
1523 }
1524 if (access_flags.is_strict() && access_flags.is_static()) {
1525 _has_strict_static_fields = true;
1526 }
1527 _temp_field_info->append(fi);
1528 }
1529 assert(_temp_field_info->length() == length, "Must be");
1530
1531 if (num_injected != 0) {
1532 for (int n = 0; n < num_injected; n++) {
1533 // Check for duplicates
1534 if (injected[n].may_be_java) {
1535 const Symbol* const name = injected[n].name();
1536 const Symbol* const signature = injected[n].signature();
1537 bool duplicate = false;
1538 for (int i = 0; i < length; i++) {
1539 const FieldInfo* const f = _temp_field_info->adr_at(i);
1540 if (name == cp->symbol_at(f->name_index()) &&
1541 signature == cp->symbol_at(f->signature_index())) {
1542 // Symbol is desclared in Java so skip this one
1543 duplicate = true;
1544 break;
1545 }
1546 }
1547 if (duplicate) {
1548 // These will be removed from the field array at the end
1549 continue;
1550 }
1551 }
1552
1553 // Injected field
1554 FieldInfo::FieldFlags fflags(0);
1555 fflags.update_injected(true);
1556 AccessFlags aflags;
1557 FieldInfo fi(aflags, (u2)(injected[n].name_index), (u2)(injected[n].signature_index), 0, fflags);
1558 int idx = _temp_field_info->append(fi);
1559 _temp_field_info->adr_at(idx)->set_index(idx);
1560 }
1561 }
1562
1563 if (is_inline_type) {
1564 // Inject static ".null_reset" field. This is an all-zero value with its null-channel set to zero.
1565 // IT should never be seen by user code, it is used when writing "null" to a nullable flat field
1566 // The all-zero value ensure that any embedded oop will be set to null, to avoid keeping dead objects
1567 // alive.
1568 FieldInfo::FieldFlags fflags2(0);
1569 fflags2.update_injected(true);
1570 AccessFlags aflags2(JVM_ACC_STATIC);
1571 FieldInfo fi2(aflags2,
1572 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(null_reset_value_name)),
1573 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(object_signature)),
1574 0,
1575 fflags2);
1576 int idx2 = _temp_field_info->append(fi2);
1577 _temp_field_info->adr_at(idx2)->set_index(idx2);
1578 _static_oop_count++;
1579 }
1580 if (!access_flags().is_identity_class() && !access_flags().is_interface()
1581 && _class_name != vmSymbols::java_lang_Object() && UseAltSubstitutabilityMethod) {
1582 // Acmp map required for abstract and concrete value classes
1583 FieldInfo::FieldFlags fflags2(0);
1584 fflags2.update_injected(true);
1585 fflags2.update_stable(true);
1586 AccessFlags aflags2(JVM_ACC_STATIC | JVM_ACC_FINAL);
1587 FieldInfo fi3(aflags2,
1588 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(acmp_maps_name)),
1589 (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(int_array_signature)),
1590 0,
1591 fflags2);
1592 int idx2 = _temp_field_info->append(fi3);
1593 _temp_field_info->adr_at(idx2)->set_index(idx2);
1594 _static_oop_count++;
1595 }
1596
1597 if (_need_verify && length > 1) {
1598 // Check duplicated fields
1599 ResourceMark rm(THREAD);
1600 // Set containing name-signature pairs
1601 NameSigHashtable* names_and_sigs = new NameSigHashtable();
1602 for (int i = 0; i < _temp_field_info->length(); i++) {
1603 NameSigHash name_and_sig(_temp_field_info->adr_at(i)->name(_cp),
1604 _temp_field_info->adr_at(i)->signature(_cp));
1605 // If no duplicates, add name/signature in hashtable names_and_sigs.
1606 if(!names_and_sigs->put(name_and_sig, 0)) {
1607 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1608 name_and_sig._name->as_C_string(), name_and_sig._sig->as_klass_external_name(), THREAD);
1609 return;
1610 }
1611 }
1612 }
1613 }
1614
1615
1955 }
1956 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
1957 if (_location != _in_field && _location != _in_class) {
1958 break; // only allow for fields and classes
1959 }
1960 if (!EnableContended || (RestrictContended && !privileged)) {
1961 break; // honor privileges
1962 }
1963 return _jdk_internal_vm_annotation_Contended;
1964 }
1965 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
1966 if (_location != _in_method) break; // only allow for methods
1967 if (RestrictReservedStack && !privileged) break; // honor privileges
1968 return _jdk_internal_vm_annotation_ReservedStackAccess;
1969 }
1970 case VM_SYMBOL_ENUM_NAME(jdk_internal_ValueBased_signature): {
1971 if (_location != _in_class) break; // only allow for classes
1972 if (!privileged) break; // only allow in privileged code
1973 return _jdk_internal_ValueBased;
1974 }
1975 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_LooselyConsistentValue_signature): {
1976 if (_location != _in_class) break; // only allow for classes
1977 return _jdk_internal_LooselyConsistentValue;
1978 }
1979 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_NullRestricted_signature): {
1980 if (_location != _in_field) break; // only allow for fields
1981 return _jdk_internal_NullRestricted;
1982 }
1983 case VM_SYMBOL_ENUM_NAME(java_lang_Deprecated): {
1984 return _java_lang_Deprecated;
1985 }
1986 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_AOTSafeClassInitializer_signature): {
1987 if (_location != _in_class) break; // only allow for classes
1988 if (!privileged) break; // only allow in privileged code
1989 return _jdk_internal_vm_annotation_AOTSafeClassInitializer;
1990 }
1991 case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_AOTRuntimeSetup_signature): {
1992 if (_location != _in_method) break; // only allow for methods
1993 if (!privileged) break; // only allow in privileged code
1994 return _method_AOTRuntimeSetup;
1995 }
1996 default: {
1997 break;
1998 }
1999 }
2000 return AnnotationCollector::_unknown;
2001 }
2002
2199 }
2200
2201 if (runtime_visible_type_annotations_length > 0) {
2202 a = allocate_annotations(runtime_visible_type_annotations,
2203 runtime_visible_type_annotations_length,
2204 CHECK);
2205 cm->set_type_annotations(a);
2206 }
2207 }
2208
2209
2210 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2211 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2212 // Method* to save footprint, so we only know the size of the resulting Method* when the
2213 // entire method attribute is parsed.
2214 //
2215 // The has_localvariable_table parameter is used to pass up the value to InstanceKlass.
2216
2217 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2218 bool is_interface,
2219 bool is_value_class,
2220 bool is_abstract_class,
2221 const ConstantPool* cp,
2222 bool* const has_localvariable_table,
2223 TRAPS) {
2224 assert(cfs != nullptr, "invariant");
2225 assert(cp != nullptr, "invariant");
2226 assert(has_localvariable_table != nullptr, "invariant");
2227
2228 ResourceMark rm(THREAD);
2229 // Parse fixed parts:
2230 // access_flags, name_index, descriptor_index, attributes_count
2231 cfs->guarantee_more(8, CHECK_NULL);
2232
2233 u2 flags = cfs->get_u2_fast();
2234 const u2 name_index = cfs->get_u2_fast();
2235 const int cp_size = cp->length();
2236 guarantee_property(
2237 valid_symbol_at(name_index),
2238 "Illegal constant pool index %u for method name in class file %s",
2239 name_index, CHECK_NULL);
2240 const Symbol* const name = cp->symbol_at(name_index);
2242
2243 const u2 signature_index = cfs->get_u2_fast();
2244 guarantee_property(
2245 valid_symbol_at(signature_index),
2246 "Illegal constant pool index %u for method signature in class file %s",
2247 signature_index, CHECK_NULL);
2248 const Symbol* const signature = cp->symbol_at(signature_index);
2249
2250 if (name == vmSymbols::class_initializer_name()) {
2251 // We ignore the other access flags for a valid class initializer.
2252 // (JVM Spec 2nd ed., chapter 4.6)
2253 if (_major_version < 51) { // backward compatibility
2254 flags = JVM_ACC_STATIC;
2255 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2256 flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2257 } else {
2258 classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2259 return nullptr;
2260 }
2261 } else {
2262 verify_legal_method_modifiers(flags, access_flags() , name, CHECK_NULL);
2263 }
2264
2265 if (name == vmSymbols::object_initializer_name() && is_interface) {
2266 classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2267 return nullptr;
2268 }
2269
2270 if (EnableValhalla) {
2271 if (((flags & JVM_ACC_SYNCHRONIZED) == JVM_ACC_SYNCHRONIZED)
2272 && ((flags & JVM_ACC_STATIC) == 0 )
2273 && !_access_flags.is_identity_class()) {
2274 classfile_parse_error("Invalid synchronized method in non-identity class %s", THREAD);
2275 return nullptr;
2276 }
2277 }
2278
2279 int args_size = -1; // only used when _need_verify is true
2280 if (_need_verify) {
2281 verify_legal_name_with_signature(name, signature, CHECK_NULL);
2282 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2283 verify_legal_method_signature(name, signature, CHECK_NULL);
2284 if (args_size > MAX_ARGS_SIZE) {
2285 classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2286 return nullptr;
2287 }
2288 }
2289
2290 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2291
2292 // Default values for code and exceptions attribute elements
2293 u2 max_stack = 0;
2294 u2 max_locals = 0;
2295 u4 code_length = 0;
2296 const u1* code_start = nullptr;
2297 u2 exception_table_length = 0;
2298 const unsafe_u2* exception_table_start = nullptr; // (potentially unaligned) pointer to array of u2 elements
2793 CHECK_NULL);
2794
2795 if (InstanceKlass::is_finalization_enabled() &&
2796 name == vmSymbols::finalize_method_name() &&
2797 signature == vmSymbols::void_method_signature()) {
2798 if (m->is_empty_method()) {
2799 _has_empty_finalizer = true;
2800 } else {
2801 _has_finalizer = true;
2802 }
2803 }
2804
2805 NOT_PRODUCT(m->verify());
2806 return m;
2807 }
2808
2809
2810 // Side-effects: populates the _methods field in the parser
2811 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2812 bool is_interface,
2813 bool is_value_class,
2814 bool is_abstract_type,
2815 bool* const has_localvariable_table,
2816 bool* has_final_method,
2817 bool* declares_nonstatic_concrete_methods,
2818 TRAPS) {
2819 assert(cfs != nullptr, "invariant");
2820 assert(has_localvariable_table != nullptr, "invariant");
2821 assert(has_final_method != nullptr, "invariant");
2822 assert(declares_nonstatic_concrete_methods != nullptr, "invariant");
2823
2824 assert(nullptr == _methods, "invariant");
2825
2826 cfs->guarantee_more(2, CHECK); // length
2827 const u2 length = cfs->get_u2_fast();
2828 if (length == 0) {
2829 _methods = Universe::the_empty_method_array();
2830 } else {
2831 _methods = MetadataFactory::new_array<Method*>(_loader_data,
2832 length,
2833 nullptr,
2834 CHECK);
2835
2836 for (int index = 0; index < length; index++) {
2837 Method* method = parse_method(cfs,
2838 is_interface,
2839 is_value_class,
2840 is_abstract_type,
2841 _cp,
2842 has_localvariable_table,
2843 CHECK);
2844
2845 if (method->is_final()) {
2846 *has_final_method = true;
2847 }
2848 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2849 // used for interface initialization, and default method inheritance analysis
2850 if (is_interface && !(*declares_nonstatic_concrete_methods)
2851 && !method->is_abstract() && !method->is_static()) {
2852 *declares_nonstatic_concrete_methods = true;
2853 }
2854 _methods->at_put(index, method);
2855 }
2856
2857 if (_need_verify && length > 1) {
2858 // Check duplicated methods
2859 ResourceMark rm(THREAD);
2860 // Set containing name-signature pairs
3086 valid_klass_reference_at(outer_class_info_index),
3087 "outer_class_info_index %u has bad constant type in class file %s",
3088 outer_class_info_index, CHECK_0);
3089
3090 if (outer_class_info_index != 0) {
3091 const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
3092 char* bytes = (char*)outer_class_name->bytes();
3093 guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
3094 "Outer class is an array class in class file %s", CHECK_0);
3095 }
3096 // Inner class name
3097 const u2 inner_name_index = cfs->get_u2_fast();
3098 guarantee_property(
3099 inner_name_index == 0 || valid_symbol_at(inner_name_index),
3100 "inner_name_index %u has bad constant type in class file %s",
3101 inner_name_index, CHECK_0);
3102 if (_need_verify) {
3103 guarantee_property(inner_class_info_index != outer_class_info_index,
3104 "Class is both outer and inner class in class file %s", CHECK_0);
3105 }
3106
3107 // Access flags
3108 u2 flags;
3109 // JVM_ACC_MODULE is defined in JDK-9 and later.
3110 if (_major_version >= JAVA_9_VERSION) {
3111 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3112 } else {
3113 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3114 }
3115
3116 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3117 // Set abstract bit for old class files for backward compatibility
3118 flags |= JVM_ACC_ABSTRACT;
3119 }
3120
3121 if (!supports_inline_types()) {
3122 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
3123 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
3124 if (!is_module && !is_interface) {
3125 flags |= JVM_ACC_IDENTITY;
3126 }
3127 }
3128
3129 Symbol* inner_name_symbol = inner_name_index == 0 ? nullptr : cp->symbol_at(inner_name_index);
3130 verify_legal_class_modifiers(flags, inner_name_symbol, inner_name_index == 0, CHECK_0);
3131 AccessFlags inner_access_flags(flags);
3132
3133 inner_classes->at_put(index++, inner_class_info_index);
3134 inner_classes->at_put(index++, outer_class_info_index);
3135 inner_classes->at_put(index++, inner_name_index);
3136 inner_classes->at_put(index++, inner_access_flags.as_unsigned_short());
3137 }
3138
3139 // Check for circular and duplicate entries.
3140 bool has_circularity = false;
3141 if (_need_verify) {
3142 has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3143 if (has_circularity) {
3144 // If circularity check failed then ignore InnerClasses attribute.
3145 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
3146 index = 0;
3147 if (parsed_enclosingmethod_attribute) {
3148 inner_classes = MetadataFactory::new_array<u2>(_loader_data, 2, CHECK_0);
3214 if (length > 0) {
3215 int index = 0;
3216 cfs->guarantee_more(2 * length, CHECK_0);
3217 for (int n = 0; n < length; n++) {
3218 const u2 class_info_index = cfs->get_u2_fast();
3219 guarantee_property(
3220 valid_klass_reference_at(class_info_index),
3221 "Permitted subclass class_info_index %u has bad constant type in class file %s",
3222 class_info_index, CHECK_0);
3223 permitted_subclasses->at_put(index++, class_info_index);
3224 }
3225 assert(index == size, "wrong size");
3226 }
3227
3228 // Restore buffer's current position.
3229 cfs->set_current(current_mark);
3230
3231 return length;
3232 }
3233
3234 u2 ClassFileParser::parse_classfile_loadable_descriptors_attribute(const ClassFileStream* const cfs,
3235 const u1* const loadable_descriptors_attribute_start,
3236 TRAPS) {
3237 const u1* const current_mark = cfs->current();
3238 u2 length = 0;
3239 if (loadable_descriptors_attribute_start != nullptr) {
3240 cfs->set_current(loadable_descriptors_attribute_start);
3241 cfs->guarantee_more(2, CHECK_0); // length
3242 length = cfs->get_u2_fast();
3243 }
3244 const int size = length;
3245 Array<u2>* const loadable_descriptors = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3246 _loadable_descriptors = loadable_descriptors;
3247 if (length > 0) {
3248 int index = 0;
3249 cfs->guarantee_more(2 * length, CHECK_0);
3250 for (int n = 0; n < length; n++) {
3251 const u2 descriptor_index = cfs->get_u2_fast();
3252 guarantee_property(
3253 valid_symbol_at(descriptor_index),
3254 "LoadableDescriptors descriptor_index %u has bad constant type in class file %s",
3255 descriptor_index, CHECK_0);
3256 Symbol* descriptor = _cp->symbol_at(descriptor_index);
3257 bool valid = legal_field_signature(descriptor, CHECK_0);
3258 if(!valid) {
3259 ResourceMark rm(THREAD);
3260 Exceptions::fthrow(THREAD_AND_LOCATION,
3261 vmSymbols::java_lang_ClassFormatError(),
3262 "Descriptor from LoadableDescriptors attribute at index \"%d\" in class %s has illegal signature \"%s\"",
3263 descriptor_index, _class_name->as_C_string(), descriptor->as_C_string());
3264 return 0;
3265 }
3266 loadable_descriptors->at_put(index++, descriptor_index);
3267 }
3268 assert(index == size, "wrong size");
3269 }
3270
3271 // Restore buffer's current position.
3272 cfs->set_current(current_mark);
3273
3274 return length;
3275 }
3276
3277 // Record {
3278 // u2 attribute_name_index;
3279 // u4 attribute_length;
3280 // u2 components_count;
3281 // component_info components[components_count];
3282 // }
3283 // component_info {
3284 // u2 name_index;
3285 // u2 descriptor_index
3286 // u2 attributes_count;
3287 // attribute_info_attributes[attributes_count];
3288 // }
3289 u4 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3290 const ConstantPool* cp,
3291 const u1* const record_attribute_start,
3292 TRAPS) {
3293 const u1* const current_mark = cfs->current();
3294 int components_count = 0;
3295 unsigned int calculate_attr_size = 0;
3296 if (record_attribute_start != nullptr) {
3522 }
3523 guarantee_property(current_start + attribute_byte_length == cfs->current(),
3524 "Bad length on BootstrapMethods in class file %s",
3525 CHECK);
3526 }
3527
3528 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3529 ConstantPool* cp,
3530 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3531 TRAPS) {
3532 assert(cfs != nullptr, "invariant");
3533 assert(cp != nullptr, "invariant");
3534 assert(parsed_annotations != nullptr, "invariant");
3535
3536 // Set inner classes attribute to default sentinel
3537 _inner_classes = Universe::the_empty_short_array();
3538 // Set nest members attribute to default sentinel
3539 _nest_members = Universe::the_empty_short_array();
3540 // Set _permitted_subclasses attribute to default sentinel
3541 _permitted_subclasses = Universe::the_empty_short_array();
3542 // Set _loadable_descriptors attribute to default sentinel
3543 _loadable_descriptors = Universe::the_empty_short_array();
3544 cfs->guarantee_more(2, CHECK); // attributes_count
3545 u2 attributes_count = cfs->get_u2_fast();
3546 bool parsed_sourcefile_attribute = false;
3547 bool parsed_innerclasses_attribute = false;
3548 bool parsed_nest_members_attribute = false;
3549 bool parsed_permitted_subclasses_attribute = false;
3550 bool parsed_loadable_descriptors_attribute = false;
3551 bool parsed_nest_host_attribute = false;
3552 bool parsed_record_attribute = false;
3553 bool parsed_enclosingmethod_attribute = false;
3554 bool parsed_bootstrap_methods_attribute = false;
3555 const u1* runtime_visible_annotations = nullptr;
3556 int runtime_visible_annotations_length = 0;
3557 const u1* runtime_visible_type_annotations = nullptr;
3558 int runtime_visible_type_annotations_length = 0;
3559 bool runtime_invisible_type_annotations_exists = false;
3560 bool runtime_invisible_annotations_exists = false;
3561 bool parsed_source_debug_ext_annotations_exist = false;
3562 const u1* inner_classes_attribute_start = nullptr;
3563 u4 inner_classes_attribute_length = 0;
3564 u2 enclosing_method_class_index = 0;
3565 u2 enclosing_method_method_index = 0;
3566 const u1* nest_members_attribute_start = nullptr;
3567 u4 nest_members_attribute_length = 0;
3568 const u1* record_attribute_start = nullptr;
3569 u4 record_attribute_length = 0;
3570 const u1* permitted_subclasses_attribute_start = nullptr;
3571 u4 permitted_subclasses_attribute_length = 0;
3572 const u1* loadable_descriptors_attribute_start = nullptr;
3573 u4 loadable_descriptors_attribute_length = 0;
3574
3575 // Iterate over attributes
3576 while (attributes_count--) {
3577 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3578 const u2 attribute_name_index = cfs->get_u2_fast();
3579 const u4 attribute_length = cfs->get_u4_fast();
3580 guarantee_property(
3581 valid_symbol_at(attribute_name_index),
3582 "Attribute name has bad constant pool index %u in class file %s",
3583 attribute_name_index, CHECK);
3584 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3585 if (tag == vmSymbols::tag_source_file()) {
3586 // Check for SourceFile tag
3587 if (_need_verify) {
3588 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3589 }
3590 if (parsed_sourcefile_attribute) {
3591 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3592 return;
3593 } else {
3769 return;
3770 }
3771 parsed_record_attribute = true;
3772 record_attribute_start = cfs->current();
3773 record_attribute_length = attribute_length;
3774 } else if (_major_version >= JAVA_17_VERSION) {
3775 if (tag == vmSymbols::tag_permitted_subclasses()) {
3776 if (parsed_permitted_subclasses_attribute) {
3777 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3778 return;
3779 }
3780 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3781 if (_access_flags.is_final()) {
3782 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3783 return;
3784 }
3785 parsed_permitted_subclasses_attribute = true;
3786 permitted_subclasses_attribute_start = cfs->current();
3787 permitted_subclasses_attribute_length = attribute_length;
3788 }
3789 if (EnableValhalla && tag == vmSymbols::tag_loadable_descriptors()) {
3790 if (parsed_loadable_descriptors_attribute) {
3791 classfile_parse_error("Multiple LoadableDescriptors attributes in class file %s", CHECK);
3792 return;
3793 }
3794 parsed_loadable_descriptors_attribute = true;
3795 loadable_descriptors_attribute_start = cfs->current();
3796 loadable_descriptors_attribute_length = attribute_length;
3797 }
3798 }
3799 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3800 cfs->skip_u1(attribute_length, CHECK);
3801 } else {
3802 // Unknown attribute
3803 cfs->skip_u1(attribute_length, CHECK);
3804 }
3805 } else {
3806 // Unknown attribute
3807 cfs->skip_u1(attribute_length, CHECK);
3808 }
3809 } else {
3810 // Unknown attribute
3811 cfs->skip_u1(attribute_length, CHECK);
3812 }
3813 }
3814 _class_annotations = allocate_annotations(runtime_visible_annotations,
3815 runtime_visible_annotations_length,
3816 CHECK);
3817 _class_type_annotations = allocate_annotations(runtime_visible_type_annotations,
3854 CHECK);
3855 if (_need_verify) {
3856 guarantee_property(record_attribute_length == calculated_attr_length,
3857 "Record attribute has wrong length in class file %s",
3858 CHECK);
3859 }
3860 }
3861
3862 if (parsed_permitted_subclasses_attribute) {
3863 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3864 cfs,
3865 permitted_subclasses_attribute_start,
3866 CHECK);
3867 if (_need_verify) {
3868 guarantee_property(
3869 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3870 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3871 }
3872 }
3873
3874 if (parsed_loadable_descriptors_attribute) {
3875 const u2 num_classes = parse_classfile_loadable_descriptors_attribute(
3876 cfs,
3877 loadable_descriptors_attribute_start,
3878 CHECK);
3879 if (_need_verify) {
3880 guarantee_property(
3881 loadable_descriptors_attribute_length == sizeof(num_classes) + sizeof(u2) * num_classes,
3882 "Wrong LoadableDescriptors attribute length in class file %s", CHECK);
3883 }
3884 }
3885
3886 if (_max_bootstrap_specifier_index >= 0) {
3887 guarantee_property(parsed_bootstrap_methods_attribute,
3888 "Missing BootstrapMethods attribute in class file %s", CHECK);
3889 }
3890 }
3891
3892 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3893 assert(k != nullptr, "invariant");
3894
3895 if (_synthetic_flag)
3896 k->set_is_synthetic();
3897 if (_sourcefile_index != 0) {
3898 k->set_source_file_name_index(_sourcefile_index);
3899 }
3900 if (_generic_signature_index != 0) {
3901 k->set_generic_signature_index(_generic_signature_index);
3902 }
3903 if (_sde_buffer != nullptr) {
3904 k->set_source_debug_extension(_sde_buffer, _sde_length);
3905 }
3932 _class_type_annotations = nullptr;
3933 _fields_annotations = nullptr;
3934 _fields_type_annotations = nullptr;
3935 }
3936
3937 // Transfer ownership of metadata allocated to the InstanceKlass.
3938 void ClassFileParser::apply_parsed_class_metadata(
3939 InstanceKlass* this_klass,
3940 int java_fields_count) {
3941 assert(this_klass != nullptr, "invariant");
3942
3943 _cp->set_pool_holder(this_klass);
3944 this_klass->set_constants(_cp);
3945 this_klass->set_fieldinfo_stream(_fieldinfo_stream);
3946 this_klass->set_fieldinfo_search_table(_fieldinfo_search_table);
3947 this_klass->set_fields_status(_fields_status);
3948 this_klass->set_methods(_methods);
3949 this_klass->set_inner_classes(_inner_classes);
3950 this_klass->set_nest_members(_nest_members);
3951 this_klass->set_nest_host_index(_nest_host);
3952 this_klass->set_loadable_descriptors(_loadable_descriptors);
3953 this_klass->set_annotations(_combined_annotations);
3954 this_klass->set_permitted_subclasses(_permitted_subclasses);
3955 this_klass->set_record_components(_record_components);
3956 this_klass->set_inline_layout_info_array(_inline_layout_info_array);
3957
3958 DEBUG_ONLY(FieldInfoStream::validate_search_table(_cp, _fieldinfo_stream, _fieldinfo_search_table));
3959
3960 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3961 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3962 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3963 // its _super. If an OOM occurs while loading the current klass, its _super field
3964 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3965 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3966 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3967
3968 // Clear out these fields so they don't get deallocated by the destructor
3969 clear_class_metadata();
3970 }
3971
3972 AnnotationArray* ClassFileParser::allocate_annotations(const u1* const anno,
3973 int anno_length,
3974 TRAPS) {
3975 AnnotationArray* annotations = nullptr;
3976 if (anno != nullptr) {
3977 annotations = MetadataFactory::new_array<u1>(_loader_data,
3978 anno_length,
3979 CHECK_(annotations));
3980 for (int i = 0; i < anno_length; i++) {
3981 annotations->at_put(i, anno[i]);
3982 }
3983 }
3984 return annotations;
3985 }
3986
3987 void ClassFileParser::check_super_class(ConstantPool* const cp,
3988 const int super_class_index,
3989 const bool need_verify,
3990 TRAPS) {
3991 assert(cp != nullptr, "invariant");
3992
3993 if (super_class_index == 0) {
3994 guarantee_property(_class_name == vmSymbols::java_lang_Object(),
3995 "Invalid superclass index 0 in class file %s",
3996 CHECK);
3997 } else {
3998 guarantee_property(valid_klass_reference_at(super_class_index),
3999 "Invalid superclass index %u in class file %s",
4000 super_class_index,
4001 CHECK);
4002
4003 // The class name should be legal because it is checked when parsing constant pool.
4004 // However, make sure it is not an array type.
4005 if (need_verify) {
4006 guarantee_property(cp->klass_name_at(super_class_index)->char_at(0) != JVM_SIGNATURE_ARRAY,
4007 "Bad superclass name in class file %s", CHECK);
4008 }
4009 }
4010 }
4011
4012 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
4013 _max_nonstatic_oop_maps = max_blocks;
4014 _nonstatic_oop_map_count = 0;
4015 if (max_blocks == 0) {
4167 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4168 assert(ik->size_helper() > 0, "layout_helper is initialized");
4169 if (ik->is_abstract() || ik->is_interface()
4170 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == nullptr)
4171 || ik->size_helper() >= FastAllocateSizeLimit) {
4172 // Forbid fast-path allocation.
4173 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4174 ik->set_layout_helper(lh);
4175 }
4176
4177 // Propagate the AOT runtimeSetup method discovery
4178 if (_has_aot_runtime_setup_method) {
4179 ik->set_is_runtime_setup_required();
4180 if (log_is_enabled(Info, aot, init)) {
4181 ResourceMark rm;
4182 log_info(aot, init)("Found @AOTRuntimeSetup class %s", ik->external_name());
4183 }
4184 }
4185 }
4186
4187 bool ClassFileParser::supports_inline_types() const {
4188 // Inline types are only supported by class file version 70.65535 and later
4189 return _major_version > JAVA_26_VERSION ||
4190 (_major_version == JAVA_26_VERSION && _minor_version == JAVA_PREVIEW_MINOR_VERSION);
4191 }
4192
4193 // utility methods for appending an array with check for duplicates
4194
4195 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4196 const Array<InstanceKlass*>* const ifs) {
4197 // iterate over new interfaces
4198 for (int i = 0; i < ifs->length(); i++) {
4199 InstanceKlass* const e = ifs->at(i);
4200 assert(e->is_klass() && e->is_interface(), "just checking");
4201 // add new interface
4202 result->append_if_missing(e);
4203 }
4204 }
4205
4206 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4207 Array<InstanceKlass*>* local_ifs,
4208 ClassLoaderData* loader_data,
4209 TRAPS) {
4210 assert(local_ifs != nullptr, "invariant");
4211 assert(loader_data != nullptr, "invariant");
4212
4216 // Add superclass transitive interfaces size
4217 if (super != nullptr) {
4218 super_size = super->transitive_interfaces()->length();
4219 max_transitive_size += super_size;
4220 }
4221 // Add local interfaces' super interfaces
4222 const int local_size = local_ifs->length();
4223 for (int i = 0; i < local_size; i++) {
4224 InstanceKlass* const l = local_ifs->at(i);
4225 max_transitive_size += l->transitive_interfaces()->length();
4226 }
4227 // Finally add local interfaces
4228 max_transitive_size += local_size;
4229 // Construct array
4230 if (max_transitive_size == 0) {
4231 // no interfaces, use canonicalized array
4232 return Universe::the_empty_instance_klass_array();
4233 } else if (max_transitive_size == super_size) {
4234 // no new local interfaces added, share superklass' transitive interface array
4235 return super->transitive_interfaces();
4236 // The three lines below are commented to work around bug JDK-8245487
4237 // } else if (max_transitive_size == local_size) {
4238 // // only local interfaces added, share local interface array
4239 // return local_ifs;
4240 } else {
4241 ResourceMark rm;
4242 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4243
4244 // Copy down from superclass
4245 if (super != nullptr) {
4246 append_interfaces(result, super->transitive_interfaces());
4247 }
4248
4249 // Copy down from local interfaces' superinterfaces
4250 for (int i = 0; i < local_size; i++) {
4251 InstanceKlass* const l = local_ifs->at(i);
4252 append_interfaces(result, l->transitive_interfaces());
4253 }
4254 // Finally add local interfaces
4255 append_interfaces(result, local_ifs);
4256
4257 // length will be less than the max_transitive_size if duplicates were removed
4258 const int length = result->length();
4259 assert(length <= max_transitive_size, "just checking");
4260
4261 Array<InstanceKlass*>* const new_result =
4262 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4263 for (int i = 0; i < length; i++) {
4264 InstanceKlass* const e = result->at(i);
4265 assert(e != nullptr, "just checking");
4266 new_result->at_put(i, e);
4267 }
4268 return new_result;
4269 }
4270 }
4271
4272 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4273 assert(this_klass != nullptr, "invariant");
4274 const InstanceKlass* const super = this_klass->super();
4275
4276 if (super != nullptr) {
4277 if (super->is_final()) {
4278 classfile_icce_error("class %s cannot inherit from final class %s", super, THREAD);
4279 return;
4280 }
4281
4282 if (super->is_sealed()) {
4283 stringStream ss;
4284 ResourceMark rm(THREAD);
4285 if (!super->has_as_permitted_subclass(this_klass, ss)) {
4286 classfile_icce_error(ss.as_string(), THREAD);
4287 return;
4288 }
4289 }
4290
4291 // The JVMS says that super classes for value types must not have the ACC_IDENTITY
4292 // flag set. But, java.lang.Object must still be allowed to be a direct super class
4293 // for a value classes. So, it is treated as a special case for now.
4294 if (!this_klass->access_flags().is_identity_class() &&
4295 super->name() != vmSymbols::java_lang_Object() &&
4296 super->is_identity_class()) {
4297 classfile_icce_error("value class %s cannot inherit from class %s", super, THREAD);
4298 return;
4299 }
4300
4301 Reflection::VerifyClassAccessResults vca_result =
4302 Reflection::verify_class_access(this_klass, super, false);
4303 if (vca_result != Reflection::ACCESS_OK) {
4304 ResourceMark rm(THREAD);
4305 char* msg = Reflection::verify_class_access_msg(this_klass,
4306 super,
4307 vca_result);
4308
4309 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4310 if (msg == nullptr) {
4311 bool same_module = (this_klass->module() == super->module());
4312 Exceptions::fthrow(
4313 THREAD_AND_LOCATION,
4314 vmSymbols::java_lang_IllegalAccessError(),
4315 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4316 this_klass->external_name(),
4317 super->is_abstract() ? "abstract " : "",
4318 super->external_name(),
4319 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4320 (same_module) ? "" : "; ",
4473 // Verify the class modifiers for the current class, or an inner class if inner_name is non-null.
4474 void ClassFileParser::verify_legal_class_modifiers(jint flags, Symbol* inner_name, bool is_anonymous_inner_class, TRAPS) const {
4475 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4476 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4477 if (is_module) {
4478 ResourceMark rm(THREAD);
4479 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4480 Exceptions::fthrow(
4481 THREAD_AND_LOCATION,
4482 vmSymbols::java_lang_NoClassDefFoundError(),
4483 "%s is not a class because access_flag ACC_MODULE is set",
4484 _class_name->as_C_string());
4485 return;
4486 }
4487
4488 if (!_need_verify) { return; }
4489
4490 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4491 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4492 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4493 const bool is_identity = (flags & JVM_ACC_IDENTITY) != 0;
4494 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4495 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4496 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4497 const bool valid_value_class = is_identity || is_interface ||
4498 (supports_inline_types() && (!is_identity && (is_abstract || is_final)));
4499
4500 if ((is_abstract && is_final) ||
4501 (is_interface && !is_abstract) ||
4502 (is_interface && major_gte_1_5 && (is_identity || is_enum)) || // ACC_SUPER (now ACC_IDENTITY) was illegal for interfaces
4503 (!is_interface && major_gte_1_5 && is_annotation) ||
4504 (!valid_value_class)) {
4505 ResourceMark rm(THREAD);
4506 const char* class_note = "";
4507 if (!valid_value_class) {
4508 class_note = " (a value class must be final or else abstract)";
4509 }
4510 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4511 if (inner_name == nullptr && !is_anonymous_inner_class) {
4512 Exceptions::fthrow(
4513 THREAD_AND_LOCATION,
4514 vmSymbols::java_lang_ClassFormatError(),
4515 "Illegal class modifiers in class %s: 0x%X",
4516 _class_name->as_C_string(), flags
4517 );
4518 } else {
4519 if (is_anonymous_inner_class) {
4520 Exceptions::fthrow(
4521 THREAD_AND_LOCATION,
4522 vmSymbols::java_lang_ClassFormatError(),
4523 "Illegal class modifiers in anonymous inner class of class %s: 0x%X",
4524 _class_name->as_C_string(), flags
4525 );
4526 } else {
4527 Exceptions::fthrow(
4528 THREAD_AND_LOCATION,
4529 vmSymbols::java_lang_ClassFormatError(),
4583 THREAD_AND_LOCATION,
4584 vmSymbols::java_lang_UnsupportedClassVersionError(),
4585 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4586 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4587 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4588 return;
4589 }
4590
4591 if (!Arguments::enable_preview()) {
4592 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4593 class_name, major, minor, THREAD);
4594 return;
4595 }
4596
4597 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4598 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4599 class_name, major, minor, THREAD);
4600 }
4601 }
4602
4603 void ClassFileParser:: verify_legal_field_modifiers(jint flags,
4604 AccessFlags class_access_flags,
4605 TRAPS) const {
4606 if (!_need_verify) { return; }
4607
4608 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4609 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4610 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4611 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4612 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4613 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4614 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4615 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4616 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4617 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4618
4619 const bool is_interface = class_access_flags.is_interface();
4620 const bool is_identity_class = class_access_flags.is_identity_class();
4621
4622 bool is_illegal = false;
4623 const char* error_msg = "";
4624
4625 // There is some overlap in the checks that apply, for example interface fields
4626 // must be static, static fields can't be strict, and therefore interfaces can't
4627 // have strict fields. So we don't have to check every possible invalid combination
4628 // individually as long as all are covered. Once we have found an illegal combination
4629 // we can stop checking.
4630
4631 if (!is_illegal) {
4632 if (is_interface) {
4633 if (!is_public || !is_static || !is_final || is_private ||
4634 is_protected || is_volatile || is_transient ||
4635 (major_gte_1_5 && is_enum)) {
4636 is_illegal = true;
4637 error_msg = "interface fields must be public, static and final, and may be synthetic";
4638 }
4639 } else { // not interface
4640 if (has_illegal_visibility(flags)) {
4641 is_illegal = true;
4642 error_msg = "invalid visibility flags for class field";
4643 } else if (is_final && is_volatile) {
4644 is_illegal = true;
4645 error_msg = "fields cannot be final and volatile";
4646 } else if (supports_inline_types()) {
4647 if (!is_identity_class && !is_static && (!is_strict || !is_final)) {
4648 is_illegal = true;
4649 error_msg = "value class fields must be either non-static final and strict, or static";
4650 }
4651 }
4652 }
4653 }
4654
4655 if (is_illegal) {
4656 ResourceMark rm(THREAD);
4657 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4658 Exceptions::fthrow(
4659 THREAD_AND_LOCATION,
4660 vmSymbols::java_lang_ClassFormatError(),
4661 "Illegal field modifiers (%s) in class %s: 0x%X",
4662 error_msg, _class_name->as_C_string(), flags);
4663 return;
4664 }
4665 }
4666
4667 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4668 AccessFlags class_access_flags,
4669 const Symbol* name,
4670 TRAPS) const {
4671 if (!_need_verify) { return; }
4672
4673 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4674 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4675 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4676 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4677 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4678 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4679 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4680 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4681 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4682 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4683 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4684 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4685 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4686 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4687 // LW401 CR required: removal of value factories support
4688 const bool is_interface = class_access_flags.is_interface();
4689 const bool is_identity_class = class_access_flags.is_identity_class();
4690 const bool is_abstract_class = class_access_flags.is_abstract();
4691
4692 bool is_illegal = false;
4693
4694 const char* class_note = "";
4695 if (is_interface) {
4696 if (major_gte_8) {
4697 // Class file version is JAVA_8_VERSION or later Methods of
4698 // interfaces may set any of the flags except ACC_PROTECTED,
4699 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4700 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4701 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4702 (is_native || is_protected || is_final || is_synchronized) ||
4703 // If a specific method of a class or interface has its
4704 // ACC_ABSTRACT flag set, it must not have any of its
4705 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4706 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4707 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4708 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4709 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4710 is_illegal = true;
4711 }
4712 } else if (major_gte_1_5) {
4713 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4714 if (!is_public || is_private || is_protected || is_static || is_final ||
4715 is_synchronized || is_native || !is_abstract || is_strict) {
4716 is_illegal = true;
4717 }
4718 } else {
4719 // Class file version is pre-JAVA_1_5_VERSION
4720 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4721 is_illegal = true;
4722 }
4723 }
4724 } else { // not interface
4725 if (has_illegal_visibility(flags)) {
4726 is_illegal = true;
4727 } else {
4728 if (is_initializer) {
4729 if (is_static || is_final || is_synchronized || is_native ||
4730 is_abstract || (major_gte_1_5 && is_bridge)) {
4731 is_illegal = true;
4732 }
4733 } else { // not initializer
4734 if (!is_identity_class && is_synchronized && !is_static) {
4735 is_illegal = true;
4736 class_note = " (not an identity class)";
4737 } else {
4738 if (is_abstract) {
4739 if ((is_final || is_native || is_private || is_static ||
4740 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4741 is_illegal = true;
4742 }
4743 }
4744 }
4745 }
4746 }
4747 }
4748
4749 if (is_illegal) {
4750 ResourceMark rm(THREAD);
4751 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4752 Exceptions::fthrow(
4753 THREAD_AND_LOCATION,
4754 vmSymbols::java_lang_ClassFormatError(),
4755 "Method %s in class %s%s has illegal modifiers: 0x%X",
4756 name->as_C_string(), _class_name->as_C_string(),
4757 class_note, flags);
4758 return;
4759 }
4760 }
4761
4762 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4763 int length,
4764 TRAPS) const {
4765 assert(_need_verify, "only called when _need_verify is true");
4766 // Note: 0 <= length < 64K, as it comes from a u2 entry in the CP.
4767 if (!UTF8::is_legal_utf8(buffer, static_cast<size_t>(length), _major_version <= 47)) {
4768 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4769 }
4770 }
4771
4772 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4773 // In class names, '/' separates unqualified names. This is verified in this function also.
4774 // Method names also may not contain the characters '<' or '>', unless <init>
4775 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4776 // method. Because these names have been checked as special cases before
4777 // calling this method in verify_legal_method_name.
4795 if (type == ClassFileParser::LegalClass) {
4796 if (p == name || p+1 >= name+length ||
4797 *(p+1) == JVM_SIGNATURE_SLASH) {
4798 return false;
4799 }
4800 } else {
4801 return false; // do not permit '/' unless it's class name
4802 }
4803 break;
4804 case JVM_SIGNATURE_SPECIAL:
4805 case JVM_SIGNATURE_ENDSPECIAL:
4806 // do not permit '<' or '>' in method names
4807 if (type == ClassFileParser::LegalMethod) {
4808 return false;
4809 }
4810 }
4811 }
4812 return true;
4813 }
4814
4815 bool ClassFileParser::is_class_in_loadable_descriptors_attribute(Symbol *klass) {
4816 if (_loadable_descriptors == nullptr) return false;
4817 for (int i = 0; i < _loadable_descriptors->length(); i++) {
4818 Symbol* class_name = _cp->symbol_at(_loadable_descriptors->at(i));
4819 if (class_name == klass) return true;
4820 }
4821 return false;
4822 }
4823
4824 // Take pointer to a UTF8 byte string (not NUL-terminated).
4825 // Skip over the longest part of the string that could
4826 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
4827 // Return a pointer to just past the fieldname.
4828 // Return null if no fieldname at all was found, or in the case of slash_ok
4829 // being true, we saw consecutive slashes (meaning we were looking for a
4830 // qualified path but found something that was badly-formed).
4831 static const char* skip_over_field_name(const char* const name,
4832 bool slash_ok,
4833 unsigned int length) {
4834 const char* p;
4835 jboolean last_is_slash = false;
4836 jboolean not_first_ch = false;
4837
4838 for (p = name; p != name + length; not_first_ch = true) {
4839 const char* old_p = p;
4840 jchar ch = *p;
4841 if (ch < 128) {
4842 p++;
4843 // quick check for ascii
4905 // be taken as a field signature. Allow "void" if void_ok.
4906 // Return a pointer to just past the signature.
4907 // Return null if no legal signature is found.
4908 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4909 bool void_ok,
4910 unsigned int length,
4911 TRAPS) const {
4912 unsigned int array_dim = 0;
4913 while (length > 0) {
4914 switch (signature[0]) {
4915 case JVM_SIGNATURE_VOID: if (!void_ok) { return nullptr; }
4916 case JVM_SIGNATURE_BOOLEAN:
4917 case JVM_SIGNATURE_BYTE:
4918 case JVM_SIGNATURE_CHAR:
4919 case JVM_SIGNATURE_SHORT:
4920 case JVM_SIGNATURE_INT:
4921 case JVM_SIGNATURE_FLOAT:
4922 case JVM_SIGNATURE_LONG:
4923 case JVM_SIGNATURE_DOUBLE:
4924 return signature + 1;
4925 case JVM_SIGNATURE_CLASS:
4926 {
4927 if (_major_version < JAVA_1_5_VERSION) {
4928 signature++;
4929 length--;
4930 // Skip over the class name if one is there
4931 const char* const p = skip_over_field_name(signature, true, length);
4932 assert(p == nullptr || p > signature, "must parse one character at least");
4933 // The next character better be a semicolon
4934 if (p != nullptr && // Parse of field name succeeded.
4935 p - signature < static_cast<int>(length) && // There is at least one character left to parse.
4936 p[0] == JVM_SIGNATURE_ENDCLASS) {
4937 return p + 1;
4938 }
4939 }
4940 else {
4941 // Skip leading 'L' or 'Q' and ignore first appearance of ';'
4942 signature++;
4943 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4944 // Format check signature
4945 if (c != nullptr) {
4946 int newlen = pointer_delta_as_int(c, (char*) signature);
4947 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4948 if (!legal) {
4949 classfile_parse_error("Class name is empty or contains illegal character "
4950 "in descriptor in class file %s",
4951 THREAD);
4952 return nullptr;
4953 }
4954 return signature + newlen + 1;
4955 }
4956 }
4957 return nullptr;
4958 }
4959 case JVM_SIGNATURE_ARRAY:
4960 array_dim++;
4961 if (array_dim > 255) {
4977
4978 // Checks if name is a legal class name.
4979 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4980 if (!_need_verify) { return; }
4981
4982 assert(name->refcount() > 0, "symbol must be kept alive");
4983 char* bytes = (char*)name->bytes();
4984 unsigned int length = name->utf8_length();
4985 bool legal = false;
4986
4987 if (length > 0) {
4988 const char* p;
4989 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4990 p = skip_over_field_signature(bytes, false, length, CHECK);
4991 legal = (p != nullptr) && ((p - bytes) == (int)length);
4992 } else if (_major_version < JAVA_1_5_VERSION) {
4993 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4994 p = skip_over_field_name(bytes, true, length);
4995 legal = (p != nullptr) && ((p - bytes) == (int)length);
4996 }
4997 } else if ((_major_version >= CONSTANT_CLASS_DESCRIPTORS || _class_name->starts_with("jdk/internal/reflect/"))
4998 && bytes[length - 1] == ';' ) {
4999 // Support for L...; descriptors
5000 legal = verify_unqualified_name(bytes + 1, length - 2, LegalClass);
5001 } else {
5002 // 4900761: relax the constraints based on JSR202 spec
5003 // Class names may be drawn from the entire Unicode character set.
5004 // Identifiers between '/' must be unqualified names.
5005 // The utf8 string has been verified when parsing cpool entries.
5006 legal = verify_unqualified_name(bytes, length, LegalClass);
5007 }
5008 }
5009 if (!legal) {
5010 ResourceMark rm(THREAD);
5011 assert(_class_name != nullptr, "invariant");
5012 // Names are all known to be < 64k so we know this formatted message is not excessively large.
5013 Exceptions::fthrow(
5014 THREAD_AND_LOCATION,
5015 vmSymbols::java_lang_ClassFormatError(),
5016 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5017 _class_name->as_C_string()
5018 );
5019 return;
5020 }
5048 THREAD_AND_LOCATION,
5049 vmSymbols::java_lang_ClassFormatError(),
5050 "Illegal field name \"%.*s\" in class %s", length, bytes,
5051 _class_name->as_C_string()
5052 );
5053 return;
5054 }
5055 }
5056
5057 // Checks if name is a legal method name.
5058 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5059 if (!_need_verify) { return; }
5060
5061 assert(name != nullptr, "method name is null");
5062 char* bytes = (char*)name->bytes();
5063 unsigned int length = name->utf8_length();
5064 bool legal = false;
5065
5066 if (length > 0) {
5067 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5068 if (name == vmSymbols::object_initializer_name() ||
5069 name == vmSymbols::class_initializer_name()) {
5070 legal = true;
5071 }
5072 } else if (_major_version < JAVA_1_5_VERSION) {
5073 const char* p;
5074 p = skip_over_field_name(bytes, false, length);
5075 legal = (p != nullptr) && ((p - bytes) == (int)length);
5076 } else {
5077 // 4881221: relax the constraints based on JSR202 spec
5078 legal = verify_unqualified_name(bytes, length, LegalMethod);
5079 }
5080 }
5081
5082 if (!legal) {
5083 ResourceMark rm(THREAD);
5084 assert(_class_name != nullptr, "invariant");
5085 // Names are all known to be < 64k so we know this formatted message is not excessively large.
5086 Exceptions::fthrow(
5087 THREAD_AND_LOCATION,
5088 vmSymbols::java_lang_ClassFormatError(),
5089 "Illegal method name \"%.*s\" in class %s", length, bytes,
5090 _class_name->as_C_string()
5091 );
5092 return;
5093 }
5094 }
5095
5096 bool ClassFileParser::legal_field_signature(const Symbol* signature, TRAPS) const {
5097 const char* const bytes = (const char*)signature->bytes();
5098 const unsigned int length = signature->utf8_length();
5099 const char* const p = skip_over_field_signature(bytes, false, length, CHECK_false);
5100
5101 if (p == nullptr || (p - bytes) != (int)length) {
5102 return false;
5103 }
5104 return true;
5105 }
5106
5107 // Checks if signature is a legal field signature.
5108 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5109 const Symbol* signature,
5110 TRAPS) const {
5111 if (!_need_verify) { return; }
5112
5113 const char* const bytes = (const char*)signature->bytes();
5114 const unsigned int length = signature->utf8_length();
5115 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5116
5117 if (p == nullptr || (p - bytes) != (int)length) {
5118 throwIllegalSignature("Field", name, signature, CHECK);
5119 }
5120 }
5121
5122 // Check that the signature is compatible with the method name. For example,
5123 // check that <init> has a void signature.
5124 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
5125 const Symbol* signature,
5126 TRAPS) const {
5127 if (!_need_verify) {
5128 return;
5129 }
5130
5131 // Class initializers cannot have args for class format version >= 51.
5132 if (name == vmSymbols::class_initializer_name() &&
5133 signature != vmSymbols::void_method_signature() &&
5134 _major_version >= JAVA_7_VERSION) {
5135 throwIllegalSignature("Method", name, signature, THREAD);
5136 return;
5137 }
5138
5139 int sig_length = signature->utf8_length();
5140 if (name->utf8_length() > 0 &&
5141 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
5142 sig_length > 0 &&
5143 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
5144 throwIllegalSignature("Method", name, signature, THREAD);
5145 }
5146 }
5147
5148 // Checks if signature is a legal method signature.
5149 // Returns number of parameters
5150 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5151 const Symbol* signature,
5152 TRAPS) const {
5153 if (!_need_verify) {
5154 // make sure caller's args_size will be less than 0 even for non-static
5155 // method so it will be recomputed in compute_size_of_parameters().
5156 return -2;
5157 }
5158
5159 unsigned int args_size = 0;
5160 const char* p = (const char*)signature->bytes();
5161 unsigned int length = signature->utf8_length();
5162 const char* nextp;
5163
5174 length -= pointer_delta_as_int(nextp, p);
5175 p = nextp;
5176 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5177 }
5178 // The first non-signature thing better be a ')'
5179 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5180 length--;
5181 // Now we better just have a return value
5182 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5183 if (nextp && ((int)length == (nextp - p))) {
5184 return args_size;
5185 }
5186 }
5187 }
5188 // Report error
5189 throwIllegalSignature("Method", name, signature, THREAD);
5190 return 0;
5191 }
5192
5193 int ClassFileParser::static_field_size() const {
5194 assert(_layout_info != nullptr, "invariant");
5195 return _layout_info->_static_field_size;
5196 }
5197
5198 int ClassFileParser::total_oop_map_count() const {
5199 assert(_layout_info != nullptr, "invariant");
5200 return _layout_info->oop_map_blocks->_nonstatic_oop_map_count;
5201 }
5202
5203 jint ClassFileParser::layout_size() const {
5204 assert(_layout_info != nullptr, "invariant");
5205 return _layout_info->_instance_size;
5206 }
5207
5208 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5209 const Array<Method*>* methods) {
5210 assert(ik != nullptr, "invariant");
5211 assert(methods != nullptr, "invariant");
5212
5213 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5214 // (We used to do this lazily, but now we query it in Rewriter,
5215 // which is eagerly done for every method, so we might as well do it now,
5216 // when everything is fresh in memory.)
5217 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
5218
5219 if (klass_id != vmSymbolID::NO_SID) {
5220 for (int j = 0; j < methods->length(); ++j) {
5221 Method* method = methods->at(j);
5222 method->init_intrinsic_id(klass_id);
5223
5224 if (CheckIntrinsics) {
5225 // Check if an intrinsic is defined for method 'method',
5300 }
5301 }
5302
5303 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5304 const ClassInstanceInfo& cl_inst_info,
5305 TRAPS) {
5306 if (_klass != nullptr) {
5307 return _klass;
5308 }
5309
5310 InstanceKlass* const ik =
5311 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5312
5313 if (is_hidden()) {
5314 mangle_hidden_class_name(ik);
5315 }
5316
5317 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5318
5319 assert(_klass == ik, "invariant");
5320 return ik;
5321 }
5322
5323 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5324 bool changed_by_loadhook,
5325 const ClassInstanceInfo& cl_inst_info,
5326 TRAPS) {
5327 assert(ik != nullptr, "invariant");
5328
5329 // Set name and CLD before adding to CLD
5330 ik->set_class_loader_data(_loader_data);
5331 ik->set_class_loader_type();
5332 ik->set_name(_class_name);
5333
5334 // Add all classes to our internal class loader list here,
5335 // including classes in the bootstrap (null) class loader.
5336 const bool publicize = !is_internal();
5337
5338 _loader_data->add_class(ik, publicize);
5339
5340 set_klass_to_deallocate(ik);
5341
5342 assert(_layout_info != nullptr, "invariant");
5343 assert(ik->static_field_size() == _layout_info->_static_field_size, "sanity");
5344 assert(ik->nonstatic_oop_map_count() == _layout_info->oop_map_blocks->_nonstatic_oop_map_count,
5345 "sanity");
5346
5347 assert(ik->is_instance_klass(), "sanity");
5348 assert(ik->size_helper() == _layout_info->_instance_size, "sanity");
5349
5350 // Fill in information already parsed
5351 ik->set_should_verify_class(_need_verify);
5352
5353 // Not yet: supers are done below to support the new subtype-checking fields
5354 ik->set_nonstatic_field_size(_layout_info->_nonstatic_field_size);
5355 ik->set_has_nonstatic_fields(_layout_info->_has_nonstatic_fields);
5356 ik->set_has_strict_static_fields(_has_strict_static_fields);
5357
5358 if (_layout_info->_is_naturally_atomic) {
5359 ik->set_is_naturally_atomic();
5360 }
5361
5362 if (_layout_info->_must_be_atomic) {
5363 ik->set_must_be_atomic();
5364 }
5365
5366 ik->set_static_oop_field_count(_static_oop_count);
5367
5368 // this transfers ownership of a lot of arrays from
5369 // the parser onto the InstanceKlass*
5370 apply_parsed_class_metadata(ik, _java_fields_count);
5371 if (ik->is_inline_klass()) {
5372 InlineKlass::cast(ik)->init_fixed_block();
5373 }
5374
5375 // can only set dynamic nest-host after static nest information is set
5376 if (cl_inst_info.dynamic_nest_host() != nullptr) {
5377 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5378 }
5379
5380 // note that is not safe to use the fields in the parser from this point on
5381 assert(nullptr == _cp, "invariant");
5382 assert(nullptr == _fieldinfo_stream, "invariant");
5383 assert(nullptr == _fieldinfo_search_table, "invariant");
5384 assert(nullptr == _fields_status, "invariant");
5385 assert(nullptr == _methods, "invariant");
5386 assert(nullptr == _inner_classes, "invariant");
5387 assert(nullptr == _nest_members, "invariant");
5388 assert(nullptr == _loadable_descriptors, "invariant");
5389 assert(nullptr == _combined_annotations, "invariant");
5390 assert(nullptr == _record_components, "invariant");
5391 assert(nullptr == _permitted_subclasses, "invariant");
5392 assert(nullptr == _inline_layout_info_array, "invariant");
5393
5394 if (_has_localvariable_table) {
5395 ik->set_has_localvariable_table(true);
5396 }
5397
5398 if (_has_final_method) {
5399 ik->set_has_final_method();
5400 }
5401
5402 ik->copy_method_ordering(_method_ordering, CHECK);
5403 // The InstanceKlass::_methods_jmethod_ids cache
5404 // is managed on the assumption that the initial cache
5405 // size is equal to the number of methods in the class. If
5406 // that changes, then InstanceKlass::idnum_can_increment()
5407 // has to be changed accordingly.
5408 ik->set_initial_method_idnum(checked_cast<u2>(ik->methods()->length()));
5409
5410 ik->set_this_class_index(_this_class_index);
5411
5412 if (_is_hidden) {
5449 if ((_num_miranda_methods > 0) ||
5450 // if this class introduced new miranda methods or
5451 (_super_klass != nullptr && _super_klass->has_miranda_methods())
5452 // super class exists and this class inherited miranda methods
5453 ) {
5454 ik->set_has_miranda_methods(); // then set a flag
5455 }
5456
5457 // Fill in information needed to compute superclasses.
5458 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5459 ik->set_transitive_interfaces(_transitive_interfaces);
5460 ik->set_local_interfaces(_local_interfaces);
5461 _transitive_interfaces = nullptr;
5462 _local_interfaces = nullptr;
5463
5464 // Initialize itable offset tables
5465 klassItable::setup_itable_offset_table(ik);
5466
5467 // Compute transitive closure of interfaces this class implements
5468 // Do final class setup
5469 OopMapBlocksBuilder* oop_map_blocks = _layout_info->oop_map_blocks;
5470 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5471 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5472 }
5473
5474 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5475 ( _super_klass != nullptr && _super_klass->has_contended_annotations())) {
5476 ik->set_has_contended_annotations(true);
5477 }
5478
5479 // Fill in has_finalizer and layout_helper
5480 set_precomputed_flags(ik);
5481
5482 // check if this class can access its super class
5483 check_super_class_access(ik, CHECK);
5484
5485 // check if this class can access its superinterfaces
5486 check_super_interface_access(ik, CHECK);
5487
5488 // check if this class overrides any final method
5489 check_final_method_override(ik, CHECK);
5510
5511 assert(_all_mirandas != nullptr, "invariant");
5512
5513 // Generate any default methods - default methods are public interface methods
5514 // that have a default implementation. This is new with Java 8.
5515 if (_has_nonstatic_concrete_methods) {
5516 DefaultMethods::generate_default_methods(ik,
5517 _all_mirandas,
5518 CHECK);
5519 }
5520
5521 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5522 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5523 !module_entry->has_default_read_edges()) {
5524 if (!module_entry->set_has_default_read_edges()) {
5525 // We won a potential race
5526 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5527 }
5528 }
5529
5530 if (is_inline_type()) {
5531 InlineKlass* vk = InlineKlass::cast(ik);
5532 vk->set_payload_alignment(_layout_info->_payload_alignment);
5533 vk->set_payload_offset(_layout_info->_payload_offset);
5534 vk->set_payload_size_in_bytes(_layout_info->_payload_size_in_bytes);
5535 vk->set_non_atomic_size_in_bytes(_layout_info->_non_atomic_size_in_bytes);
5536 vk->set_non_atomic_alignment(_layout_info->_non_atomic_alignment);
5537 vk->set_atomic_size_in_bytes(_layout_info->_atomic_layout_size_in_bytes);
5538 vk->set_nullable_size_in_bytes(_layout_info->_nullable_layout_size_in_bytes);
5539 vk->set_null_marker_offset(_layout_info->_null_marker_offset);
5540 vk->set_null_reset_value_offset(_layout_info->_null_reset_value_offset);
5541 if (_layout_info->_is_empty_inline_klass) vk->set_is_empty_inline_type();
5542 vk->initialize_calling_convention(CHECK);
5543 }
5544
5545 if (EnableValhalla && !access_flags().is_identity_class() && !access_flags().is_interface()
5546 && _class_name != vmSymbols::java_lang_Object() && UseAltSubstitutabilityMethod) {
5547 // Both abstract and concrete value classes need a field map for acmp
5548 ik->set_acmp_maps_offset(_layout_info->_acmp_maps_offset);
5549 // Current format of acmp maps:
5550 // All maps are stored contiguously in a single int array because it might
5551 // be too early to instantiate an Object array (to be investigated)
5552 // Format is:
5553 // [number_of_nonoop_entries][offset0][size[0][offset1][size1]...[oop_offset0][oop_offset1]...
5554 // ^ ^
5555 // | |
5556 // --------------------- Pair of integer describing a segment of
5557 // contiguous non-oop fields
5558 // First element is the number of segment of contiguous non-oop fields
5559 // Then, each segment of contiguous non-oop fields is described by two consecutive elements:
5560 // the offset then the size.
5561 // After the last segment of contiguous non-oop fields, oop fields are described, one element
5562 // per oop field, containing the offset of the field.
5563 int nonoop_acmp_map_size = _layout_info->_nonoop_acmp_map->length() * 2;
5564 int oop_acmp_map_size = _layout_info->_oop_acmp_map->length();
5565 typeArrayOop map = oopFactory::new_intArray(nonoop_acmp_map_size + oop_acmp_map_size + 1, CHECK);
5566 typeArrayHandle map_h(THREAD, map);
5567 map_h->int_at_put(0, _layout_info->_nonoop_acmp_map->length());
5568 for (int i = 0; i < _layout_info->_nonoop_acmp_map->length(); i++) {
5569 map_h->int_at_put(i * 2 + 1, _layout_info->_nonoop_acmp_map->at(i).first);
5570 map_h->int_at_put(i * 2 + 2, _layout_info->_nonoop_acmp_map->at(i).second);
5571 }
5572 int oop_map_start = nonoop_acmp_map_size + 1;
5573 for (int i = 0; i < _layout_info->_oop_acmp_map->length(); i++) {
5574 map_h->int_at_put(oop_map_start + i, _layout_info->_oop_acmp_map->at(i));
5575 }
5576 ik->java_mirror()->obj_field_put(ik->acmp_maps_offset(), map_h());
5577 }
5578
5579 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5580
5581 if (!is_internal()) {
5582 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5583
5584 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5585 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5586 log_is_enabled(Info, class, preview)) {
5587 ResourceMark rm;
5588 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5589 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5590 }
5591
5592 if (log_is_enabled(Debug, class, resolve)) {
5593 ResourceMark rm;
5594 // print out the superclass.
5595 const char * from = ik->external_name();
5596 if (ik->super() != nullptr) {
5597 log_debug(class, resolve)("%s %s (super)",
5598 from,
5641 const ClassLoadInfo* cl_info,
5642 Publicity pub_level,
5643 TRAPS) :
5644 _stream(stream),
5645 _class_name(nullptr),
5646 _loader_data(loader_data),
5647 _is_hidden(cl_info->is_hidden()),
5648 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5649 _orig_cp_size(0),
5650 _static_oop_count(0),
5651 _super_klass(),
5652 _cp(nullptr),
5653 _fieldinfo_stream(nullptr),
5654 _fieldinfo_search_table(nullptr),
5655 _fields_status(nullptr),
5656 _methods(nullptr),
5657 _inner_classes(nullptr),
5658 _nest_members(nullptr),
5659 _nest_host(0),
5660 _permitted_subclasses(nullptr),
5661 _loadable_descriptors(nullptr),
5662 _record_components(nullptr),
5663 _local_interfaces(nullptr),
5664 _local_interface_indexes(nullptr),
5665 _transitive_interfaces(nullptr),
5666 _combined_annotations(nullptr),
5667 _class_annotations(nullptr),
5668 _class_type_annotations(nullptr),
5669 _fields_annotations(nullptr),
5670 _fields_type_annotations(nullptr),
5671 _klass(nullptr),
5672 _klass_to_deallocate(nullptr),
5673 _parsed_annotations(nullptr),
5674 _layout_info(nullptr),
5675 _inline_layout_info_array(nullptr),
5676 _temp_field_info(nullptr),
5677 _method_ordering(nullptr),
5678 _all_mirandas(nullptr),
5679 _vtable_size(0),
5680 _itable_size(0),
5681 _num_miranda_methods(0),
5682 _protection_domain(cl_info->protection_domain()),
5683 _access_flags(),
5684 _pub_level(pub_level),
5685 _bad_constant_seen(0),
5686 _synthetic_flag(false),
5687 _sde_length(false),
5688 _sde_buffer(nullptr),
5689 _sourcefile_index(0),
5690 _generic_signature_index(0),
5691 _major_version(0),
5692 _minor_version(0),
5693 _this_class_index(0),
5694 _super_class_index(0),
5695 _itfs_len(0),
5696 _java_fields_count(0),
5697 _need_verify(false),
5698 _has_nonstatic_concrete_methods(false),
5699 _declares_nonstatic_concrete_methods(false),
5700 _has_localvariable_table(false),
5701 _has_final_method(false),
5702 _has_contended_fields(false),
5703 _has_aot_runtime_setup_method(false),
5704 _has_strict_static_fields(false),
5705 _has_inline_type_fields(false),
5706 _is_naturally_atomic(false),
5707 _must_be_atomic(true),
5708 _has_loosely_consistent_annotation(false),
5709 _has_finalizer(false),
5710 _has_empty_finalizer(false),
5711 _max_bootstrap_specifier_index(-1) {
5712
5713 _class_name = name != nullptr ? name : vmSymbols::unknown_class_name();
5714 _class_name->increment_refcount();
5715
5716 assert(_loader_data != nullptr, "invariant");
5717 assert(stream != nullptr, "invariant");
5718 assert(_stream != nullptr, "invariant");
5719 assert(_stream->buffer() == _stream->current(), "invariant");
5720 assert(_class_name != nullptr, "invariant");
5721 assert(0 == _access_flags.as_unsigned_short(), "invariant");
5722
5723 // Figure out whether we can skip format checking (matching classic VM behavior)
5724 // Always verify CFLH bytes from the user agents.
5725 _need_verify = stream->from_class_file_load_hook() ? true : Verifier::should_verify_for(_loader_data->class_loader());
5726
5727 // synch back verification state to stream to check for truncation.
5728 stream->set_need_verify(_need_verify);
5729
5730 parse_stream(stream, CHECK);
5731
5732 post_process_parsed_stream(stream, _cp, CHECK);
5733 }
5734
5735 void ClassFileParser::clear_class_metadata() {
5736 // metadata created before the instance klass is created. Must be
5737 // deallocated if classfile parsing returns an error.
5738 _cp = nullptr;
5739 _fieldinfo_stream = nullptr;
5740 _fieldinfo_search_table = nullptr;
5741 _fields_status = nullptr;
5742 _methods = nullptr;
5743 _inner_classes = nullptr;
5744 _nest_members = nullptr;
5745 _permitted_subclasses = nullptr;
5746 _loadable_descriptors = nullptr;
5747 _combined_annotations = nullptr;
5748 _class_annotations = _class_type_annotations = nullptr;
5749 _fields_annotations = _fields_type_annotations = nullptr;
5750 _record_components = nullptr;
5751 _inline_layout_info_array = nullptr;
5752 }
5753
5754 // Destructor to clean up
5755 ClassFileParser::~ClassFileParser() {
5756 _class_name->decrement_refcount();
5757
5758 if (_cp != nullptr) {
5759 MetadataFactory::free_metadata(_loader_data, _cp);
5760 }
5761
5762 if (_fieldinfo_stream != nullptr) {
5763 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_stream);
5764 }
5765 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_search_table);
5766
5767 if (_fields_status != nullptr) {
5768 MetadataFactory::free_array<FieldStatus>(_loader_data, _fields_status);
5769 }
5770
5771 if (_inline_layout_info_array != nullptr) {
5772 MetadataFactory::free_array<InlineLayoutInfo>(_loader_data, _inline_layout_info_array);
5773 }
5774
5775 if (_methods != nullptr) {
5776 // Free methods
5777 InstanceKlass::deallocate_methods(_loader_data, _methods);
5778 }
5779
5780 // beware of the Universe::empty_blah_array!!
5781 if (_inner_classes != nullptr && _inner_classes != Universe::the_empty_short_array()) {
5782 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5783 }
5784
5785 if (_nest_members != nullptr && _nest_members != Universe::the_empty_short_array()) {
5786 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5787 }
5788
5789 if (_record_components != nullptr) {
5790 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5791 }
5792
5793 if (_permitted_subclasses != nullptr && _permitted_subclasses != Universe::the_empty_short_array()) {
5794 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5795 }
5796
5797 if (_loadable_descriptors != nullptr && _loadable_descriptors != Universe::the_empty_short_array()) {
5798 MetadataFactory::free_array<u2>(_loader_data, _loadable_descriptors);
5799 }
5800
5801 // Free interfaces
5802 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5803 _local_interfaces, _transitive_interfaces);
5804
5805 if (_combined_annotations != nullptr) {
5806 // After all annotations arrays have been created, they are installed into the
5807 // Annotations object that will be assigned to the InstanceKlass being created.
5808
5809 // Deallocate the Annotations object and the installed annotations arrays.
5810 _combined_annotations->deallocate_contents(_loader_data);
5811
5812 // If the _combined_annotations pointer is non-null,
5813 // then the other annotations fields should have been cleared.
5814 assert(_class_annotations == nullptr, "Should have been cleared");
5815 assert(_class_type_annotations == nullptr, "Should have been cleared");
5816 assert(_fields_annotations == nullptr, "Should have been cleared");
5817 assert(_fields_type_annotations == nullptr, "Should have been cleared");
5818 } else {
5819 // If the annotations arrays were not installed into the Annotations object,
5820 // then they have to be deallocated explicitly.
5879
5880 assert(cp_size == (u2)cp->length(), "invariant");
5881
5882 // ACCESS FLAGS
5883 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5884
5885 // Access flags
5886 u2 flags;
5887 // JVM_ACC_MODULE is defined in JDK-9 and later.
5888 if (_major_version >= JAVA_9_VERSION) {
5889 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5890 } else {
5891 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5892 }
5893
5894 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5895 // Set abstract bit for old class files for backward compatibility
5896 flags |= JVM_ACC_ABSTRACT;
5897 }
5898
5899 // Fixing ACC_SUPER/ACC_IDENTITY for old class files
5900 if (!supports_inline_types()) {
5901 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
5902 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
5903 if (!is_module && !is_interface) {
5904 flags |= JVM_ACC_IDENTITY;
5905 }
5906 }
5907
5908 verify_legal_class_modifiers(flags, nullptr, false, CHECK);
5909
5910 short bad_constant = class_bad_constant_seen();
5911 if (bad_constant != 0) {
5912 // Do not throw CFE until after the access_flags are checked because if
5913 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5914 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5915 return;
5916 }
5917
5918 _access_flags.set_flags(flags);
5919
5920 // This class and superclass
5921 _this_class_index = stream->get_u2_fast();
5922 guarantee_property(
5923 valid_cp_range(_this_class_index, cp_size) &&
5924 cp->tag_at(_this_class_index).is_unresolved_klass(),
5925 "Invalid this class index %u in constant pool in class file %s",
5926 _this_class_index, CHECK);
5927
5991 }
5992 ls.cr();
5993 }
5994 }
5995
5996 // SUPERKLASS
5997 _super_class_index = stream->get_u2_fast();
5998 check_super_class(cp,
5999 _super_class_index,
6000 _need_verify,
6001 CHECK);
6002
6003 // Interfaces
6004 _itfs_len = stream->get_u2_fast();
6005 parse_interfaces(stream,
6006 _itfs_len,
6007 cp,
6008 &_has_nonstatic_concrete_methods,
6009 CHECK);
6010
6011 // Fields (offsets are filled in later)
6012 parse_fields(stream,
6013 _access_flags,
6014 cp,
6015 cp_size,
6016 &_java_fields_count,
6017 CHECK);
6018
6019 assert(_temp_field_info != nullptr, "invariant");
6020
6021 // Methods
6022 parse_methods(stream,
6023 is_interface(),
6024 !is_identity_class(),
6025 is_abstract_class(),
6026 &_has_localvariable_table,
6027 &_has_final_method,
6028 &_declares_nonstatic_concrete_methods,
6029 CHECK);
6030
6031 assert(_methods != nullptr, "invariant");
6032
6033 if (_declares_nonstatic_concrete_methods) {
6034 _has_nonstatic_concrete_methods = true;
6035 }
6036
6037 // Additional attributes/annotations
6038 _parsed_annotations = new ClassAnnotationCollector();
6039 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6040
6041 assert(_inner_classes != nullptr, "invariant");
6042
6043 // Finalize the Annotations metadata object,
6044 // now that all annotation arrays have been created.
6045 create_combined_annotations(CHECK);
6093 }
6094
6095 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6096 ConstantPool* cp,
6097 TRAPS) {
6098 assert(stream != nullptr, "invariant");
6099 assert(stream->at_eos(), "invariant");
6100 assert(cp != nullptr, "invariant");
6101 assert(_loader_data != nullptr, "invariant");
6102
6103 if (_class_name == vmSymbols::java_lang_Object()) {
6104 precond(_super_class_index == 0);
6105 precond(_super_klass == nullptr);
6106 guarantee_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6107 "java.lang.Object cannot implement an interface in class file %s",
6108 CHECK);
6109 } else {
6110 // Set _super_klass after class file is parsed and format is checked
6111 assert(_super_class_index > 0, "any class other than Object must have a super class");
6112 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6113 if (is_interface()) {
6114 // Before attempting to resolve the superclass, check for class format
6115 // errors not checked yet.
6116 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6117 "Interfaces must have java.lang.Object as superclass in class file %s",
6118 CHECK);
6119 }
6120 Handle loader(THREAD, _loader_data->class_loader());
6121 if (loader.is_null() && super_class_name == vmSymbols::java_lang_Object()) {
6122 // fast path to avoid lookup
6123 _super_klass = vmClasses::Object_klass();
6124 } else {
6125 _super_klass = (const InstanceKlass*)
6126 SystemDictionary::resolve_super_or_fail(_class_name,
6127 super_class_name,
6128 loader,
6129 true,
6130 CHECK);
6131 }
6132 }
6133
6134 if (_super_klass != nullptr) {
6135 if (_super_klass->is_interface()) {
6136 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
6137 return;
6138 }
6139
6140 if (_super_klass->is_final()) {
6141 classfile_icce_error("class %s cannot inherit from final class %s", _super_klass, THREAD);
6142 return;
6143 }
6144
6145 if (EnableValhalla) {
6146 check_identity_and_value_modifiers(this, _super_klass, CHECK);
6147 }
6148
6149 if (_super_klass->has_nonstatic_concrete_methods()) {
6150 _has_nonstatic_concrete_methods = true;
6151 }
6152 }
6153
6154 if (_parsed_annotations->has_annotation(AnnotationCollector::_jdk_internal_LooselyConsistentValue) && _access_flags.is_identity_class()) {
6155 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
6156 err_msg("class %s cannot have annotation jdk.internal.vm.annotation.LooselyConsistentValue, because it is not a value class",
6157 _class_name->as_klass_external_name()));
6158 }
6159
6160 // Determining is the class allows tearing or not (default is not)
6161 if (EnableValhalla && !_access_flags.is_identity_class()) {
6162 if (_parsed_annotations->has_annotation(ClassAnnotationCollector::_jdk_internal_LooselyConsistentValue)
6163 && (_super_klass == vmClasses::Object_klass() || !_super_klass->must_be_atomic())) {
6164 // Conditions above are not sufficient to determine atomicity requirements,
6165 // the presence of fields with atomic requirements could force the current class to have atomicy requirements too
6166 // Marking as not needing atomicity for now, can be updated when computing the fields layout
6167 // The InstanceKlass must be filled with the value from the FieldLayoutInfo returned by
6168 // the FieldLayoutBuilder, not with this _must_be_atomic field.
6169 _must_be_atomic = false;
6170 }
6171 // Apply VM options override
6172 if (*ForceNonTearable != '\0') {
6173 // Allow a command line switch to force the same atomicity property:
6174 const char* class_name_str = _class_name->as_C_string();
6175 if (StringUtils::class_list_match(ForceNonTearable, class_name_str)) {
6176 _must_be_atomic = true;
6177 }
6178 }
6179 }
6180
6181 int itfs_len = _local_interface_indexes == nullptr ? 0 : _local_interface_indexes->length();
6182 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, nullptr, CHECK);
6183 if (_local_interface_indexes != nullptr) {
6184 for (int i = 0; i < _local_interface_indexes->length(); i++) {
6185 u2 interface_index = _local_interface_indexes->at(i);
6186 Klass* interf;
6187 if (cp->tag_at(interface_index).is_klass()) {
6188 interf = cp->resolved_klass_at(interface_index);
6189 } else {
6190 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
6191
6192 // Don't need to check legal name because it's checked when parsing constant pool.
6193 // But need to make sure it's not an array type.
6194 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
6195 "Bad interface name in class file %s", CHECK);
6196
6197 // Call resolve on the interface class name with class circularity checking
6198 interf = SystemDictionary::resolve_super_or_fail(
6199 _class_name,
6200 unresolved_klass,
6201 Handle(THREAD, _loader_data->class_loader()),
6202 false,
6203 CHECK);
6204 }
6205
6206 if (!interf->is_interface()) {
6207 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
6208 err_msg("class %s can not implement %s, because it is not an interface (%s)",
6209 _class_name->as_klass_external_name(),
6210 interf->external_name(),
6211 interf->class_in_module_of_loader()));
6212 }
6213
6214 if (EnableValhalla) {
6215 // Check modifiers and set carries_identity_modifier/carries_value_modifier flags
6216 check_identity_and_value_modifiers(this, InstanceKlass::cast(interf), CHECK);
6217 }
6218
6219 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
6220 _has_nonstatic_concrete_methods = true;
6221 }
6222 _local_interfaces->at_put(i, InstanceKlass::cast(interf));
6223 }
6224 }
6225 assert(_local_interfaces != nullptr, "invariant");
6226
6227 // Compute the transitive list of all unique interfaces implemented by this class
6228 _transitive_interfaces =
6229 compute_transitive_interfaces(_super_klass,
6230 _local_interfaces,
6231 _loader_data,
6232 CHECK);
6233
6234 assert(_transitive_interfaces != nullptr, "invariant");
6235
6236 // sort methods
6237 _method_ordering = sort_methods(_methods);
6238
6239 _all_mirandas = new GrowableArray<Method*>(20);
6240
6241 Handle loader(THREAD, _loader_data->class_loader());
6242 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6243 &_num_miranda_methods,
6244 _all_mirandas,
6245 _super_klass,
6246 _methods,
6247 _access_flags,
6248 _major_version,
6249 loader,
6250 _class_name,
6251 _local_interfaces);
6252
6253 // Size of Java itable (in words)
6254 _itable_size = is_interface() ? 0 :
6255 klassItable::compute_itable_size(_transitive_interfaces);
6256
6257 assert(_parsed_annotations != nullptr, "invariant");
6258
6259 if (EnableValhalla) {
6260 _inline_layout_info_array = MetadataFactory::new_array<InlineLayoutInfo>(_loader_data,
6261 java_fields_count(),
6262 CHECK);
6263 for (GrowableArrayIterator<FieldInfo> it = _temp_field_info->begin(); it != _temp_field_info->end(); ++it) {
6264 FieldInfo fieldinfo = *it;
6265 if (fieldinfo.access_flags().is_static()) continue; // Only non-static fields are processed at load time
6266 Symbol* sig = fieldinfo.signature(cp);
6267 if (fieldinfo.field_flags().is_null_free_inline_type()) {
6268 // Pre-load classes of null-free fields that are candidate for flattening
6269 TempNewSymbol s = Signature::strip_envelope(sig);
6270 if (s == _class_name) {
6271 THROW_MSG(vmSymbols::java_lang_ClassCircularityError(),
6272 err_msg("Class %s cannot have a null-free non-static field of its own type", _class_name->as_C_string()));
6273 }
6274 log_info(class, preload)("Preloading of class %s during loading of class %s. "
6275 "Cause: a null-free non-static field is declared with this type",
6276 s->as_C_string(), _class_name->as_C_string());
6277 InstanceKlass* klass = SystemDictionary::resolve_with_circularity_detection(_class_name, s,
6278 Handle(THREAD,
6279 _loader_data->class_loader()),
6280 false, THREAD);
6281 if (HAS_PENDING_EXCEPTION) {
6282 log_info(class, preload)("Preloading of class %s during loading of class %s "
6283 "(cause: null-free non-static field) failed: %s",
6284 s->as_C_string(), _class_name->as_C_string(),
6285 PENDING_EXCEPTION->klass()->name()->as_C_string());
6286 return; // Exception is still pending
6287 }
6288 assert(klass != nullptr, "Sanity check");
6289 InstanceKlass::check_can_be_annotated_with_NullRestricted(klass, _class_name, CHECK);
6290 InlineKlass* vk = InlineKlass::cast(klass);
6291 _inline_layout_info_array->adr_at(fieldinfo.index())->set_klass(vk);
6292 log_info(class, preload)("Preloading of class %s during loading of class %s "
6293 "(cause: null-free non-static field) succeeded",
6294 s->as_C_string(), _class_name->as_C_string());
6295 } else if (Signature::has_envelope(sig) && PreloadClasses) {
6296 // Preloading classes for nullable fields that are listed in the LoadableDescriptors attribute
6297 // Those classes would be required later for the flattening of nullable inline type fields
6298 TempNewSymbol name = Signature::strip_envelope(sig);
6299 if (name != _class_name && is_class_in_loadable_descriptors_attribute(sig)) {
6300 log_info(class, preload)("Preloading of class %s during loading of class %s. "
6301 "Cause: field type in LoadableDescriptors attribute",
6302 name->as_C_string(), _class_name->as_C_string());
6303 oop loader = loader_data()->class_loader();
6304 Klass* klass = SystemDictionary::resolve_super_or_fail(_class_name, name,
6305 Handle(THREAD, loader),
6306 false, THREAD);
6307 if (klass != nullptr) {
6308 if (klass->is_inline_klass()) {
6309 _inline_layout_info_array->adr_at(fieldinfo.index())->set_klass(InlineKlass::cast(klass));
6310 log_info(class, preload)("Preloading of class %s during loading of class %s "
6311 "(cause: field type in LoadableDescriptors attribute) succeeded",
6312 name->as_C_string(), _class_name->as_C_string());
6313 } else {
6314 // Non value class are allowed by the current spec, but it could be an indication of an issue so let's log a warning
6315 log_info(class, preload)("Preloading of class %s during loading of class %s "
6316 "(cause: field type in LoadableDescriptors attribute) but loaded class is not a value class",
6317 name->as_C_string(), _class_name->as_C_string());
6318 }
6319 } else {
6320 log_info(class, preload)("Preloading of class %s during loading of class %s "
6321 "(cause: field type in LoadableDescriptors attribute) failed : %s",
6322 name->as_C_string(), _class_name->as_C_string(),
6323 PENDING_EXCEPTION->klass()->name()->as_C_string());
6324 }
6325 // Loads triggered by the LoadableDescriptors attribute are speculative, failures must not impact loading of current class
6326 if (HAS_PENDING_EXCEPTION) {
6327 CLEAR_PENDING_EXCEPTION;
6328 }
6329 } else {
6330 // Just poking the system dictionary to see if the class has already be loaded. Looking for migrated classes
6331 // used when --enable-preview when jdk isn't compiled with --enable-preview so doesn't include LoadableDescriptors.
6332 // This is temporary.
6333 oop loader = loader_data()->class_loader();
6334 InstanceKlass* klass = SystemDictionary::find_instance_klass(THREAD, name, Handle(THREAD, loader));
6335 if (klass != nullptr && klass->is_inline_klass()) {
6336 _inline_layout_info_array->adr_at(fieldinfo.index())->set_klass(InlineKlass::cast(klass));
6337 log_info(class, preload)("Preloading of class %s during loading of class %s "
6338 "(cause: field type not in LoadableDescriptors attribute) succeeded",
6339 name->as_C_string(), _class_name->as_C_string());
6340 }
6341 }
6342 }
6343 }
6344 }
6345
6346 _layout_info = new FieldLayoutInfo();
6347 FieldLayoutBuilder lb(class_name(), loader_data(), super_klass(), _cp, /*_fields*/ _temp_field_info,
6348 _parsed_annotations->is_contended(), is_inline_type(),
6349 access_flags().is_abstract() && !access_flags().is_identity_class() && !access_flags().is_interface(),
6350 _must_be_atomic, _layout_info, _inline_layout_info_array);
6351 lb.build_layout();
6352 _has_inline_type_fields = _layout_info->_has_inline_fields;
6353
6354 int injected_fields_count = _temp_field_info->length() - _java_fields_count;
6355 _fieldinfo_stream =
6356 FieldInfoStream::create_FieldInfoStream(_temp_field_info, _java_fields_count,
6357 injected_fields_count, loader_data(), CHECK);
6358 _fieldinfo_search_table = FieldInfoStream::create_search_table(_cp, _fieldinfo_stream, _loader_data, CHECK);
6359 _fields_status =
6360 MetadataFactory::new_array<FieldStatus>(_loader_data, _temp_field_info->length(),
6361 FieldStatus(0), CHECK);
6362
6363 // Strict static fields track initialization status from the beginning of time.
6364 // After this class runs <clinit>, they will be verified as being "not unset".
6365 // See Step 8 of InstanceKlass::initialize_impl.
6366 if (_has_strict_static_fields) {
6367 bool found_one = false;
6368 for (int i = 0; i < _temp_field_info->length(); i++) {
6369 FieldInfo& fi = *_temp_field_info->adr_at(i);
6370 if (fi.access_flags().is_strict() && fi.access_flags().is_static()) {
6371 found_one = true;
6372 if (fi.initializer_index() != 0) {
6373 // skip strict static fields with ConstantValue attributes
6374 } else {
6375 _fields_status->adr_at(fi.index())->update_strict_static_unset(true);
6376 _fields_status->adr_at(fi.index())->update_strict_static_unread(true);
6377 }
6378 }
6379 }
6380 assert(found_one == _has_strict_static_fields,
6381 "correct prediction = %d", (int)_has_strict_static_fields);
6382 }
6383 }
6384
6385 void ClassFileParser::set_klass(InstanceKlass* klass) {
6386
6387 #ifdef ASSERT
6388 if (klass != nullptr) {
6389 assert(nullptr == _klass, "leaking?");
6390 }
6391 #endif
6392
6393 _klass = klass;
6394 }
6395
6396 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6397
6398 #ifdef ASSERT
6399 if (klass != nullptr) {
6400 assert(nullptr == _klass_to_deallocate, "leaking?");
6401 }
6402 #endif
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