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/bsmAttribute.inline.hpp"
51 #include "oops/constantPool.inline.hpp"
52 #include "oops/fieldInfo.hpp"
53 #include "oops/fieldStreams.inline.hpp"
54 #include "oops/instanceKlass.inline.hpp"
55 #include "oops/instanceMirrorKlass.hpp"
56 #include "oops/klass.inline.hpp"
57 #include "oops/klassVtable.hpp"
58 #include "oops/metadata.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/oop.inline.hpp"
61 #include "oops/recordComponent.hpp"
62 #include "oops/symbol.hpp"
63 #include "prims/jvmtiExport.hpp"
64 #include "prims/jvmtiThreadState.hpp"
65 #include "runtime/arguments.hpp"
66 #include "runtime/fieldDescriptor.inline.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/os.hpp"
70 #include "runtime/perfData.hpp"
71 #include "runtime/reflection.hpp"
72 #include "runtime/safepointVerifiers.hpp"
73 #include "runtime/signature.hpp"
74 #include "runtime/timer.hpp"
75 #include "services/classLoadingService.hpp"
76 #include "services/threadService.hpp"
77 #include "utilities/align.hpp"
78 #include "utilities/bitMap.inline.hpp"
79 #include "utilities/checkedCast.hpp"
80 #include "utilities/copy.hpp"
81 #include "utilities/exceptions.hpp"
82 #include "utilities/formatBuffer.hpp"
83 #include "utilities/globalDefinitions.hpp"
84 #include "utilities/growableArray.hpp"
85 #include "utilities/hashTable.hpp"
86 #include "utilities/macros.hpp"
87 #include "utilities/ostream.hpp"
88 #include "utilities/utf8.hpp"
89 #if INCLUDE_CDS
90 #include "classfile/systemDictionaryShared.hpp"
91 #endif
92
93 // We generally try to create the oops directly when parsing, rather than
94 // allocating temporary data structures and copying the bytes twice. A
95 // temporary area is only needed when parsing utf8 entries in the constant
96 // pool and when parsing line number tables.
97
98 // We add assert in debug mode when class format is not checked.
99
100 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
101 #define JAVA_MIN_SUPPORTED_VERSION 45
102 #define JAVA_PREVIEW_MINOR_VERSION 65535
103
104 // Used for two backward compatibility reasons:
105 // - to check for new additions to the class file format in JDK1.5
106 // - to check for bug fixes in the format checker in JDK1.5
107 #define JAVA_1_5_VERSION 49
139 #define JAVA_18_VERSION 62
140
141 #define JAVA_19_VERSION 63
142
143 #define JAVA_20_VERSION 64
144
145 #define JAVA_21_VERSION 65
146
147 #define JAVA_22_VERSION 66
148
149 #define JAVA_23_VERSION 67
150
151 #define JAVA_24_VERSION 68
152
153 #define JAVA_25_VERSION 69
154
155 #define JAVA_26_VERSION 70
156
157 #define JAVA_27_VERSION 71
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) {
3356 cp->bsm_entries().end_extension(iter, _loader_data, CHECK);
3357 guarantee_property(current_before_parsing + attribute_byte_length == cfs->current(),
3358 "Bad length on BootstrapMethods in class file %s",
3359 CHECK);
3360 }
3361
3362 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3363 ConstantPool* cp,
3364 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3365 TRAPS) {
3366 assert(cfs != nullptr, "invariant");
3367 assert(cp != nullptr, "invariant");
3368 assert(parsed_annotations != nullptr, "invariant");
3369
3370 // Set inner classes attribute to default sentinel
3371 _inner_classes = Universe::the_empty_short_array();
3372 // Set nest members attribute to default sentinel
3373 _nest_members = Universe::the_empty_short_array();
3374 // Set _permitted_subclasses attribute to default sentinel
3375 _permitted_subclasses = Universe::the_empty_short_array();
3376 cfs->guarantee_more(2, CHECK); // attributes_count
3377 u2 attributes_count = cfs->get_u2_fast();
3378 bool parsed_sourcefile_attribute = false;
3379 bool parsed_innerclasses_attribute = false;
3380 bool parsed_nest_members_attribute = false;
3381 bool parsed_permitted_subclasses_attribute = false;
3382 bool parsed_nest_host_attribute = false;
3383 bool parsed_record_attribute = false;
3384 bool parsed_enclosingmethod_attribute = false;
3385 bool parsed_bootstrap_methods_attribute = false;
3386 const u1* runtime_visible_annotations = nullptr;
3387 int runtime_visible_annotations_length = 0;
3388 const u1* runtime_visible_type_annotations = nullptr;
3389 int runtime_visible_type_annotations_length = 0;
3390 bool runtime_invisible_type_annotations_exists = false;
3391 bool runtime_invisible_annotations_exists = false;
3392 bool parsed_source_debug_ext_annotations_exist = false;
3393 const u1* inner_classes_attribute_start = nullptr;
3394 u4 inner_classes_attribute_length = 0;
3395 u2 enclosing_method_class_index = 0;
3396 u2 enclosing_method_method_index = 0;
3397 const u1* nest_members_attribute_start = nullptr;
3398 u4 nest_members_attribute_length = 0;
3399 const u1* record_attribute_start = nullptr;
3400 u4 record_attribute_length = 0;
3401 const u1* permitted_subclasses_attribute_start = nullptr;
3402 u4 permitted_subclasses_attribute_length = 0;
3403
3404 // Iterate over attributes
3405 while (attributes_count--) {
3406 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3407 const u2 attribute_name_index = cfs->get_u2_fast();
3408 const u4 attribute_length = cfs->get_u4_fast();
3409 guarantee_property(
3410 valid_symbol_at(attribute_name_index),
3411 "Attribute name has bad constant pool index %u in class file %s",
3412 attribute_name_index, CHECK);
3413 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3414 if (tag == vmSymbols::tag_source_file()) {
3415 // Check for SourceFile tag
3416 if (_need_verify) {
3417 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3418 }
3419 if (parsed_sourcefile_attribute) {
3420 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3421 return;
3422 } else {
3598 return;
3599 }
3600 parsed_record_attribute = true;
3601 record_attribute_start = cfs->current();
3602 record_attribute_length = attribute_length;
3603 } else if (_major_version >= JAVA_17_VERSION) {
3604 if (tag == vmSymbols::tag_permitted_subclasses()) {
3605 if (parsed_permitted_subclasses_attribute) {
3606 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3607 return;
3608 }
3609 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3610 if (_access_flags.is_final()) {
3611 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3612 return;
3613 }
3614 parsed_permitted_subclasses_attribute = true;
3615 permitted_subclasses_attribute_start = cfs->current();
3616 permitted_subclasses_attribute_length = attribute_length;
3617 }
3618 }
3619 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3620 cfs->skip_u1(attribute_length, CHECK);
3621 } else {
3622 // Unknown attribute
3623 cfs->skip_u1(attribute_length, CHECK);
3624 }
3625 } else {
3626 // Unknown attribute
3627 cfs->skip_u1(attribute_length, CHECK);
3628 }
3629 } else {
3630 // Unknown attribute
3631 cfs->skip_u1(attribute_length, CHECK);
3632 }
3633 }
3634 _class_annotations = allocate_annotations(runtime_visible_annotations,
3635 runtime_visible_annotations_length,
3636 CHECK);
3637 _class_type_annotations = allocate_annotations(runtime_visible_type_annotations,
3674 CHECK);
3675 if (_need_verify) {
3676 guarantee_property(record_attribute_length == calculated_attr_length,
3677 "Record attribute has wrong length in class file %s",
3678 CHECK);
3679 }
3680 }
3681
3682 if (parsed_permitted_subclasses_attribute) {
3683 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3684 cfs,
3685 permitted_subclasses_attribute_start,
3686 CHECK);
3687 if (_need_verify) {
3688 guarantee_property(
3689 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3690 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3691 }
3692 }
3693
3694 if (_max_bootstrap_specifier_index >= 0) {
3695 guarantee_property(parsed_bootstrap_methods_attribute,
3696 "Missing BootstrapMethods attribute in class file %s", CHECK);
3697 }
3698 }
3699
3700 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3701 assert(k != nullptr, "invariant");
3702
3703 if (_synthetic_flag)
3704 k->set_is_synthetic();
3705 if (_sourcefile_index != 0) {
3706 k->set_source_file_name_index(_sourcefile_index);
3707 }
3708 if (_generic_signature_index != 0) {
3709 k->set_generic_signature_index(_generic_signature_index);
3710 }
3711 if (_sde_buffer != nullptr) {
3712 k->set_source_debug_extension(_sde_buffer, _sde_length);
3713 }
3740 _class_type_annotations = nullptr;
3741 _fields_annotations = nullptr;
3742 _fields_type_annotations = nullptr;
3743 }
3744
3745 // Transfer ownership of metadata allocated to the InstanceKlass.
3746 void ClassFileParser::apply_parsed_class_metadata(
3747 InstanceKlass* this_klass,
3748 int java_fields_count) {
3749 assert(this_klass != nullptr, "invariant");
3750
3751 _cp->set_pool_holder(this_klass);
3752 this_klass->set_constants(_cp);
3753 this_klass->set_fieldinfo_stream(_fieldinfo_stream);
3754 this_klass->set_fieldinfo_search_table(_fieldinfo_search_table);
3755 this_klass->set_fields_status(_fields_status);
3756 this_klass->set_methods(_methods);
3757 this_klass->set_inner_classes(_inner_classes);
3758 this_klass->set_nest_members(_nest_members);
3759 this_klass->set_nest_host_index(_nest_host);
3760 this_klass->set_annotations(_combined_annotations);
3761 this_klass->set_permitted_subclasses(_permitted_subclasses);
3762 this_klass->set_record_components(_record_components);
3763
3764 DEBUG_ONLY(FieldInfoStream::validate_search_table(_cp, _fieldinfo_stream, _fieldinfo_search_table));
3765
3766 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3767 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3768 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3769 // its _super. If an OOM occurs while loading the current klass, its _super field
3770 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3771 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3772 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3773
3774 // Clear out these fields so they don't get deallocated by the destructor
3775 clear_class_metadata();
3776 }
3777
3778 AnnotationArray* ClassFileParser::allocate_annotations(const u1* const anno,
3779 int anno_length,
3780 TRAPS) {
3781 AnnotationArray* annotations = nullptr;
3782 if (anno != nullptr) {
3783 annotations = MetadataFactory::new_array<u1>(_loader_data,
3784 anno_length,
3785 CHECK_(annotations));
3786 for (int i = 0; i < anno_length; i++) {
3787 annotations->at_put(i, anno[i]);
3788 }
3789 }
3790 return annotations;
3791 }
3792
3793 void ClassFileParser::check_super_class(ConstantPool* const cp,
3794 const int super_class_index,
3795 const bool need_verify,
3796 TRAPS) {
3797 assert(cp != nullptr, "invariant");
3798
3799 if (super_class_index == 0) {
3800 guarantee_property(_class_name == vmSymbols::java_lang_Object(),
3801 "Invalid superclass index %u in class file %s",
3802 super_class_index,
3803 CHECK);
3804 } else {
3805 guarantee_property(valid_klass_reference_at(super_class_index),
3806 "Invalid superclass index %u in class file %s",
3807 super_class_index,
3808 CHECK);
3809
3810 // The class name should be legal because it is checked when parsing constant pool.
3811 // However, make sure it is not an array type.
3812 if (need_verify) {
3813 guarantee_property(cp->klass_name_at(super_class_index)->char_at(0) != JVM_SIGNATURE_ARRAY,
3814 "Bad superclass name in class file %s", CHECK);
3815 }
3816 }
3817 }
3818
3819 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
3820 _max_nonstatic_oop_maps = max_blocks;
3821 _nonstatic_oop_map_count = 0;
3822 if (max_blocks == 0) {
3974 // See documentation of InstanceKlass::can_be_fastpath_allocated().
3975 assert(ik->size_helper() > 0, "layout_helper is initialized");
3976 if (ik->is_abstract() || ik->is_interface()
3977 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == nullptr)
3978 || ik->size_helper() >= FastAllocateSizeLimit) {
3979 // Forbid fast-path allocation.
3980 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
3981 ik->set_layout_helper(lh);
3982 }
3983
3984 // Propagate the AOT runtimeSetup method discovery
3985 if (_has_aot_runtime_setup_method) {
3986 ik->set_is_runtime_setup_required();
3987 if (log_is_enabled(Info, aot, init)) {
3988 ResourceMark rm;
3989 log_info(aot, init)("Found @AOTRuntimeSetup class %s", ik->external_name());
3990 }
3991 }
3992 }
3993
3994 // utility methods for appending an array with check for duplicates
3995
3996 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
3997 const Array<InstanceKlass*>* const ifs) {
3998 // iterate over new interfaces
3999 for (int i = 0; i < ifs->length(); i++) {
4000 InstanceKlass* const e = ifs->at(i);
4001 assert(e->is_klass() && e->is_interface(), "just checking");
4002 // add new interface
4003 result->append_if_missing(e);
4004 }
4005 }
4006
4007 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4008 Array<InstanceKlass*>* local_ifs,
4009 ClassLoaderData* loader_data,
4010 TRAPS) {
4011 assert(local_ifs != nullptr, "invariant");
4012 assert(loader_data != nullptr, "invariant");
4013
4017 // Add superclass transitive interfaces size
4018 if (super != nullptr) {
4019 super_size = super->transitive_interfaces()->length();
4020 max_transitive_size += super_size;
4021 }
4022 // Add local interfaces' super interfaces
4023 const int local_size = local_ifs->length();
4024 for (int i = 0; i < local_size; i++) {
4025 InstanceKlass* const l = local_ifs->at(i);
4026 max_transitive_size += l->transitive_interfaces()->length();
4027 }
4028 // Finally add local interfaces
4029 max_transitive_size += local_size;
4030 // Construct array
4031 if (max_transitive_size == 0) {
4032 // no interfaces, use canonicalized array
4033 return Universe::the_empty_instance_klass_array();
4034 } else if (max_transitive_size == super_size) {
4035 // no new local interfaces added, share superklass' transitive interface array
4036 return super->transitive_interfaces();
4037 } else if (max_transitive_size == local_size) {
4038 // only local interfaces added, share local interface array
4039 return local_ifs;
4040 } else {
4041 ResourceMark rm;
4042 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4043
4044 // Copy down from superclass
4045 if (super != nullptr) {
4046 append_interfaces(result, super->transitive_interfaces());
4047 }
4048
4049 // Copy down from local interfaces' superinterfaces
4050 for (int i = 0; i < local_size; i++) {
4051 InstanceKlass* const l = local_ifs->at(i);
4052 append_interfaces(result, l->transitive_interfaces());
4053 }
4054 // Finally add local interfaces
4055 append_interfaces(result, local_ifs);
4056
4057 // length will be less than the max_transitive_size if duplicates were removed
4058 const int length = result->length();
4059 assert(length <= max_transitive_size, "just checking");
4060 Array<InstanceKlass*>* const new_result =
4061 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4062 for (int i = 0; i < length; i++) {
4063 InstanceKlass* const e = result->at(i);
4064 assert(e != nullptr, "just checking");
4065 new_result->at_put(i, e);
4066 }
4067 return new_result;
4068 }
4069 }
4070
4071 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4072 assert(this_klass != nullptr, "invariant");
4073 const InstanceKlass* const super = this_klass->super();
4074
4075 if (super != nullptr) {
4076 if (super->is_final()) {
4077 classfile_icce_error("class %s cannot inherit from final class %s", super, THREAD);
4078 return;
4079 }
4080
4081 if (super->is_sealed()) {
4082 stringStream ss;
4083 ResourceMark rm(THREAD);
4084 if (!super->has_as_permitted_subclass(this_klass, ss)) {
4085 classfile_icce_error(ss.as_string(), THREAD);
4086 return;
4087 }
4088 }
4089
4090 Reflection::VerifyClassAccessResults vca_result =
4091 Reflection::verify_class_access(this_klass, super, false);
4092 if (vca_result != Reflection::ACCESS_OK) {
4093 ResourceMark rm(THREAD);
4094 char* msg = Reflection::verify_class_access_msg(this_klass,
4095 super,
4096 vca_result);
4097
4098 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4099 if (msg == nullptr) {
4100 bool same_module = (this_klass->module() == super->module());
4101 Exceptions::fthrow(
4102 THREAD_AND_LOCATION,
4103 vmSymbols::java_lang_IllegalAccessError(),
4104 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4105 this_klass->external_name(),
4106 super->is_abstract() ? "abstract " : "",
4107 super->external_name(),
4108 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4109 (same_module) ? "" : "; ",
4262 // Verify the class modifiers for the current class, or an inner class if inner_name is non-null.
4263 void ClassFileParser::verify_legal_class_modifiers(jint flags, Symbol* inner_name, bool is_anonymous_inner_class, TRAPS) const {
4264 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4265 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4266 if (is_module) {
4267 ResourceMark rm(THREAD);
4268 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4269 Exceptions::fthrow(
4270 THREAD_AND_LOCATION,
4271 vmSymbols::java_lang_NoClassDefFoundError(),
4272 "%s is not a class because access_flag ACC_MODULE is set",
4273 _class_name->as_C_string());
4274 return;
4275 }
4276
4277 if (!_need_verify) { return; }
4278
4279 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4280 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4281 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4282 const bool is_super = (flags & JVM_ACC_SUPER) != 0;
4283 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4284 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4285 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4286
4287 if ((is_abstract && is_final) ||
4288 (is_interface && !is_abstract) ||
4289 (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4290 (!is_interface && major_gte_1_5 && is_annotation)) {
4291 ResourceMark rm(THREAD);
4292 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4293 if (inner_name == nullptr && !is_anonymous_inner_class) {
4294 Exceptions::fthrow(
4295 THREAD_AND_LOCATION,
4296 vmSymbols::java_lang_ClassFormatError(),
4297 "Illegal class modifiers in class %s: 0x%X",
4298 _class_name->as_C_string(), flags
4299 );
4300 } else {
4301 if (is_anonymous_inner_class) {
4302 Exceptions::fthrow(
4303 THREAD_AND_LOCATION,
4304 vmSymbols::java_lang_ClassFormatError(),
4305 "Illegal class modifiers in anonymous inner class of class %s: 0x%X",
4306 _class_name->as_C_string(), flags
4307 );
4308 } else {
4309 Exceptions::fthrow(
4310 THREAD_AND_LOCATION,
4311 vmSymbols::java_lang_ClassFormatError(),
4365 THREAD_AND_LOCATION,
4366 vmSymbols::java_lang_UnsupportedClassVersionError(),
4367 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4368 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4369 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4370 return;
4371 }
4372
4373 if (!Arguments::enable_preview()) {
4374 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4375 class_name, major, minor, THREAD);
4376 return;
4377 }
4378
4379 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4380 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4381 class_name, major, minor, THREAD);
4382 }
4383 }
4384
4385 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4386 bool is_interface,
4387 TRAPS) const {
4388 if (!_need_verify) { return; }
4389
4390 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4391 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4392 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4393 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4394 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4395 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4396 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4397 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4398 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4399
4400 bool is_illegal = false;
4401
4402 if (is_interface) {
4403 if (!is_public || !is_static || !is_final || is_private ||
4404 is_protected || is_volatile || is_transient ||
4405 (major_gte_1_5 && is_enum)) {
4406 is_illegal = true;
4407 }
4408 } else { // not interface
4409 if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4410 is_illegal = true;
4411 }
4412 }
4413
4414 if (is_illegal) {
4415 ResourceMark rm(THREAD);
4416 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4417 Exceptions::fthrow(
4418 THREAD_AND_LOCATION,
4419 vmSymbols::java_lang_ClassFormatError(),
4420 "Illegal field modifiers in class %s: 0x%X",
4421 _class_name->as_C_string(), flags);
4422 return;
4423 }
4424 }
4425
4426 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4427 bool is_interface,
4428 const Symbol* name,
4429 TRAPS) const {
4430 if (!_need_verify) { return; }
4431
4432 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4433 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4434 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4435 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4436 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4437 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4438 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4439 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4440 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4441 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4442 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4443 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4444 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4445 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4446
4447 bool is_illegal = false;
4448
4449 if (is_interface) {
4450 if (major_gte_8) {
4451 // Class file version is JAVA_8_VERSION or later Methods of
4452 // interfaces may set any of the flags except ACC_PROTECTED,
4453 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4454 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4455 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4456 (is_native || is_protected || is_final || is_synchronized) ||
4457 // If a specific method of a class or interface has its
4458 // ACC_ABSTRACT flag set, it must not have any of its
4459 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4460 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4461 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4462 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4463 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4464 is_illegal = true;
4465 }
4466 } else if (major_gte_1_5) {
4467 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4468 if (!is_public || is_private || is_protected || is_static || is_final ||
4469 is_synchronized || is_native || !is_abstract || is_strict) {
4470 is_illegal = true;
4471 }
4472 } else {
4473 // Class file version is pre-JAVA_1_5_VERSION
4474 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4475 is_illegal = true;
4476 }
4477 }
4478 } else { // not interface
4479 if (has_illegal_visibility(flags)) {
4480 is_illegal = true;
4481 } else {
4482 if (is_initializer) {
4483 if (is_static || is_final || is_synchronized || is_native ||
4484 is_abstract || (major_gte_1_5 && is_bridge)) {
4485 is_illegal = true;
4486 }
4487 } else { // not initializer
4488 if (is_abstract) {
4489 if ((is_final || is_native || is_private || is_static ||
4490 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4491 is_illegal = true;
4492 }
4493 }
4494 }
4495 }
4496 }
4497
4498 if (is_illegal) {
4499 ResourceMark rm(THREAD);
4500 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4501 Exceptions::fthrow(
4502 THREAD_AND_LOCATION,
4503 vmSymbols::java_lang_ClassFormatError(),
4504 "Method %s in class %s has illegal modifiers: 0x%X",
4505 name->as_C_string(), _class_name->as_C_string(), flags);
4506 return;
4507 }
4508 }
4509
4510 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4511 int length,
4512 TRAPS) const {
4513 assert(_need_verify, "only called when _need_verify is true");
4514 // Note: 0 <= length < 64K, as it comes from a u2 entry in the CP.
4515 if (!UTF8::is_legal_utf8(buffer, static_cast<size_t>(length), _major_version <= 47)) {
4516 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4517 }
4518 }
4519
4520 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4521 // In class names, '/' separates unqualified names. This is verified in this function also.
4522 // Method names also may not contain the characters '<' or '>', unless <init>
4523 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4524 // method. Because these names have been checked as special cases before
4525 // calling this method in verify_legal_method_name.
4543 if (type == ClassFileParser::LegalClass) {
4544 if (p == name || p+1 >= name+length ||
4545 *(p+1) == JVM_SIGNATURE_SLASH) {
4546 return false;
4547 }
4548 } else {
4549 return false; // do not permit '/' unless it's class name
4550 }
4551 break;
4552 case JVM_SIGNATURE_SPECIAL:
4553 case JVM_SIGNATURE_ENDSPECIAL:
4554 // do not permit '<' or '>' in method names
4555 if (type == ClassFileParser::LegalMethod) {
4556 return false;
4557 }
4558 }
4559 }
4560 return true;
4561 }
4562
4563 // Take pointer to a UTF8 byte string (not NUL-terminated).
4564 // Skip over the longest part of the string that could
4565 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
4566 // Return a pointer to just past the fieldname.
4567 // Return null if no fieldname at all was found, or in the case of slash_ok
4568 // being true, we saw consecutive slashes (meaning we were looking for a
4569 // qualified path but found something that was badly-formed).
4570 static const char* skip_over_field_name(const char* const name,
4571 bool slash_ok,
4572 unsigned int length) {
4573 const char* p;
4574 jboolean last_is_slash = false;
4575 jboolean not_first_ch = false;
4576
4577 for (p = name; p != name + length; not_first_ch = true) {
4578 const char* old_p = p;
4579 jchar ch = *p;
4580 if (ch < 128) {
4581 p++;
4582 // quick check for ascii
4644 // be taken as a field signature. Allow "void" if void_ok.
4645 // Return a pointer to just past the signature.
4646 // Return null if no legal signature is found.
4647 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4648 bool void_ok,
4649 unsigned int length,
4650 TRAPS) const {
4651 unsigned int array_dim = 0;
4652 while (length > 0) {
4653 switch (signature[0]) {
4654 case JVM_SIGNATURE_VOID: if (!void_ok) { return nullptr; }
4655 case JVM_SIGNATURE_BOOLEAN:
4656 case JVM_SIGNATURE_BYTE:
4657 case JVM_SIGNATURE_CHAR:
4658 case JVM_SIGNATURE_SHORT:
4659 case JVM_SIGNATURE_INT:
4660 case JVM_SIGNATURE_FLOAT:
4661 case JVM_SIGNATURE_LONG:
4662 case JVM_SIGNATURE_DOUBLE:
4663 return signature + 1;
4664 case JVM_SIGNATURE_CLASS: {
4665 if (_major_version < JAVA_1_5_VERSION) {
4666 signature++;
4667 length--;
4668 // Skip over the class name if one is there
4669 const char* const p = skip_over_field_name(signature, true, length);
4670 assert(p == nullptr || p > signature, "must parse one character at least");
4671 // The next character better be a semicolon
4672 if (p != nullptr && // Parse of field name succeeded.
4673 p - signature < static_cast<int>(length) && // There is at least one character left to parse.
4674 p[0] == JVM_SIGNATURE_ENDCLASS) {
4675 return p + 1;
4676 }
4677 }
4678 else {
4679 // Skip leading 'L' and ignore first appearance of ';'
4680 signature++;
4681 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4682 // Format check signature
4683 if (c != nullptr) {
4684 int newlen = pointer_delta_as_int(c, (char*) signature);
4685 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4686 if (!legal) {
4687 classfile_parse_error("Class name is empty or contains illegal character "
4688 "in descriptor in class file %s",
4689 THREAD);
4690 return nullptr;
4691 }
4692 return signature + newlen + 1;
4693 }
4694 }
4695 return nullptr;
4696 }
4697 case JVM_SIGNATURE_ARRAY:
4698 array_dim++;
4699 if (array_dim > 255) {
4715
4716 // Checks if name is a legal class name.
4717 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4718 if (!_need_verify) { return; }
4719
4720 assert(name->refcount() > 0, "symbol must be kept alive");
4721 char* bytes = (char*)name->bytes();
4722 unsigned int length = name->utf8_length();
4723 bool legal = false;
4724
4725 if (length > 0) {
4726 const char* p;
4727 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4728 p = skip_over_field_signature(bytes, false, length, CHECK);
4729 legal = (p != nullptr) && ((p - bytes) == (int)length);
4730 } else if (_major_version < JAVA_1_5_VERSION) {
4731 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4732 p = skip_over_field_name(bytes, true, length);
4733 legal = (p != nullptr) && ((p - bytes) == (int)length);
4734 }
4735 } else {
4736 // 4900761: relax the constraints based on JSR202 spec
4737 // Class names may be drawn from the entire Unicode character set.
4738 // Identifiers between '/' must be unqualified names.
4739 // The utf8 string has been verified when parsing cpool entries.
4740 legal = verify_unqualified_name(bytes, length, LegalClass);
4741 }
4742 }
4743 if (!legal) {
4744 ResourceMark rm(THREAD);
4745 assert(_class_name != nullptr, "invariant");
4746 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4747 Exceptions::fthrow(
4748 THREAD_AND_LOCATION,
4749 vmSymbols::java_lang_ClassFormatError(),
4750 "Illegal class name \"%.*s\" in class file %s", length, bytes,
4751 _class_name->as_C_string()
4752 );
4753 return;
4754 }
4782 THREAD_AND_LOCATION,
4783 vmSymbols::java_lang_ClassFormatError(),
4784 "Illegal field name \"%.*s\" in class %s", length, bytes,
4785 _class_name->as_C_string()
4786 );
4787 return;
4788 }
4789 }
4790
4791 // Checks if name is a legal method name.
4792 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4793 if (!_need_verify) { return; }
4794
4795 assert(name != nullptr, "method name is null");
4796 char* bytes = (char*)name->bytes();
4797 unsigned int length = name->utf8_length();
4798 bool legal = false;
4799
4800 if (length > 0) {
4801 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
4802 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4803 legal = true;
4804 }
4805 } else if (_major_version < JAVA_1_5_VERSION) {
4806 const char* p;
4807 p = skip_over_field_name(bytes, false, length);
4808 legal = (p != nullptr) && ((p - bytes) == (int)length);
4809 } else {
4810 // 4881221: relax the constraints based on JSR202 spec
4811 legal = verify_unqualified_name(bytes, length, LegalMethod);
4812 }
4813 }
4814
4815 if (!legal) {
4816 ResourceMark rm(THREAD);
4817 assert(_class_name != nullptr, "invariant");
4818 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4819 Exceptions::fthrow(
4820 THREAD_AND_LOCATION,
4821 vmSymbols::java_lang_ClassFormatError(),
4822 "Illegal method name \"%.*s\" in class %s", length, bytes,
4823 _class_name->as_C_string()
4824 );
4825 return;
4826 }
4827 }
4828
4829
4830 // Checks if signature is a legal field signature.
4831 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
4832 const Symbol* signature,
4833 TRAPS) const {
4834 if (!_need_verify) { return; }
4835
4836 const char* const bytes = (const char*)signature->bytes();
4837 const unsigned int length = signature->utf8_length();
4838 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
4839
4840 if (p == nullptr || (p - bytes) != (int)length) {
4841 throwIllegalSignature("Field", name, signature, CHECK);
4842 }
4843 }
4844
4845 // Check that the signature is compatible with the method name. For example,
4846 // check that <init> has a void signature.
4847 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
4848 const Symbol* signature,
4849 TRAPS) const {
4850 if (!_need_verify) {
4851 return;
4852 }
4853
4854 // Class initializers cannot have args for class format version >= 51.
4855 if (name == vmSymbols::class_initializer_name() &&
4856 signature != vmSymbols::void_method_signature() &&
4857 _major_version >= JAVA_7_VERSION) {
4858 throwIllegalSignature("Method", name, signature, THREAD);
4859 return;
4860 }
4861
4862 int sig_length = signature->utf8_length();
4863 if (name->utf8_length() > 0 &&
4864 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
4865 sig_length > 0 &&
4866 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
4867 throwIllegalSignature("Method", name, signature, THREAD);
4868 }
4869 }
4870
4871 // Checks if signature is a legal method signature.
4872 // Returns number of parameters
4873 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
4874 const Symbol* signature,
4875 TRAPS) const {
4876 if (!_need_verify) {
4877 // make sure caller's args_size will be less than 0 even for non-static
4878 // method so it will be recomputed in compute_size_of_parameters().
4879 return -2;
4880 }
4881
4882 unsigned int args_size = 0;
4883 const char* p = (const char*)signature->bytes();
4884 unsigned int length = signature->utf8_length();
4885 const char* nextp;
4886
4897 length -= pointer_delta_as_int(nextp, p);
4898 p = nextp;
4899 nextp = skip_over_field_signature(p, false, length, CHECK_0);
4900 }
4901 // The first non-signature thing better be a ')'
4902 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4903 length--;
4904 // Now we better just have a return value
4905 nextp = skip_over_field_signature(p, true, length, CHECK_0);
4906 if (nextp && ((int)length == (nextp - p))) {
4907 return args_size;
4908 }
4909 }
4910 }
4911 // Report error
4912 throwIllegalSignature("Method", name, signature, THREAD);
4913 return 0;
4914 }
4915
4916 int ClassFileParser::static_field_size() const {
4917 assert(_field_info != nullptr, "invariant");
4918 return _field_info->_static_field_size;
4919 }
4920
4921 int ClassFileParser::total_oop_map_count() const {
4922 assert(_field_info != nullptr, "invariant");
4923 return _field_info->oop_map_blocks->_nonstatic_oop_map_count;
4924 }
4925
4926 jint ClassFileParser::layout_size() const {
4927 assert(_field_info != nullptr, "invariant");
4928 return _field_info->_instance_size;
4929 }
4930
4931 static void check_methods_for_intrinsics(const InstanceKlass* ik,
4932 const Array<Method*>* methods) {
4933 assert(ik != nullptr, "invariant");
4934 assert(methods != nullptr, "invariant");
4935
4936 // Set up Method*::intrinsic_id as soon as we know the names of methods.
4937 // (We used to do this lazily, but now we query it in Rewriter,
4938 // which is eagerly done for every method, so we might as well do it now,
4939 // when everything is fresh in memory.)
4940 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
4941
4942 if (klass_id != vmSymbolID::NO_SID) {
4943 for (int j = 0; j < methods->length(); ++j) {
4944 Method* method = methods->at(j);
4945 method->init_intrinsic_id(klass_id);
4946
4947 if (CheckIntrinsics) {
4948 // Check if an intrinsic is defined for method 'method',
5023 }
5024 }
5025
5026 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5027 const ClassInstanceInfo& cl_inst_info,
5028 TRAPS) {
5029 if (_klass != nullptr) {
5030 return _klass;
5031 }
5032
5033 InstanceKlass* const ik =
5034 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5035
5036 if (is_hidden()) {
5037 mangle_hidden_class_name(ik);
5038 }
5039
5040 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5041
5042 assert(_klass == ik, "invariant");
5043
5044 return ik;
5045 }
5046
5047 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5048 bool changed_by_loadhook,
5049 const ClassInstanceInfo& cl_inst_info,
5050 TRAPS) {
5051 assert(ik != nullptr, "invariant");
5052
5053 // Set name and CLD before adding to CLD
5054 ik->set_class_loader_data(_loader_data);
5055 ik->set_class_loader_type();
5056 ik->set_name(_class_name);
5057
5058 // Add all classes to our internal class loader list here,
5059 // including classes in the bootstrap (null) class loader.
5060 const bool publicize = !is_internal();
5061
5062 _loader_data->add_class(ik, publicize);
5063
5064 set_klass_to_deallocate(ik);
5065
5066 assert(_field_info != nullptr, "invariant");
5067 assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5068 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5069 "sanity");
5070
5071 assert(ik->is_instance_klass(), "sanity");
5072 assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5073
5074 // Fill in information already parsed
5075 ik->set_should_verify_class(_need_verify);
5076
5077 // Not yet: supers are done below to support the new subtype-checking fields
5078 ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5079 ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5080 ik->set_static_oop_field_count(_static_oop_count);
5081
5082 // this transfers ownership of a lot of arrays from
5083 // the parser onto the InstanceKlass*
5084 apply_parsed_class_metadata(ik, _java_fields_count);
5085
5086 // can only set dynamic nest-host after static nest information is set
5087 if (cl_inst_info.dynamic_nest_host() != nullptr) {
5088 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5089 }
5090
5091 // note that is not safe to use the fields in the parser from this point on
5092 assert(nullptr == _cp, "invariant");
5093 assert(nullptr == _fieldinfo_stream, "invariant");
5094 assert(nullptr == _fieldinfo_search_table, "invariant");
5095 assert(nullptr == _fields_status, "invariant");
5096 assert(nullptr == _methods, "invariant");
5097 assert(nullptr == _inner_classes, "invariant");
5098 assert(nullptr == _nest_members, "invariant");
5099 assert(nullptr == _combined_annotations, "invariant");
5100 assert(nullptr == _record_components, "invariant");
5101 assert(nullptr == _permitted_subclasses, "invariant");
5102
5103 if (_has_localvariable_table) {
5104 ik->set_has_localvariable_table(true);
5105 }
5106
5107 if (_has_final_method) {
5108 ik->set_has_final_method();
5109 }
5110
5111 ik->copy_method_ordering(_method_ordering, CHECK);
5112 // The InstanceKlass::_methods_jmethod_ids cache
5113 // is managed on the assumption that the initial cache
5114 // size is equal to the number of methods in the class. If
5115 // that changes, then InstanceKlass::idnum_can_increment()
5116 // has to be changed accordingly.
5117 ik->set_initial_method_idnum(checked_cast<u2>(ik->methods()->length()));
5118
5119 ik->set_this_class_index(_this_class_index);
5120
5121 if (_is_hidden) {
5158 if ((_num_miranda_methods > 0) ||
5159 // if this class introduced new miranda methods or
5160 (_super_klass != nullptr && _super_klass->has_miranda_methods())
5161 // super class exists and this class inherited miranda methods
5162 ) {
5163 ik->set_has_miranda_methods(); // then set a flag
5164 }
5165
5166 // Fill in information needed to compute superclasses.
5167 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5168 ik->set_transitive_interfaces(_transitive_interfaces);
5169 ik->set_local_interfaces(_local_interfaces);
5170 _transitive_interfaces = nullptr;
5171 _local_interfaces = nullptr;
5172
5173 // Initialize itable offset tables
5174 klassItable::setup_itable_offset_table(ik);
5175
5176 // Compute transitive closure of interfaces this class implements
5177 // Do final class setup
5178 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5179 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5180 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5181 }
5182
5183 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5184 ( _super_klass != nullptr && _super_klass->has_contended_annotations())) {
5185 ik->set_has_contended_annotations(true);
5186 }
5187
5188 // Fill in has_finalizer and layout_helper
5189 set_precomputed_flags(ik);
5190
5191 // check if this class can access its super class
5192 check_super_class_access(ik, CHECK);
5193
5194 // check if this class can access its superinterfaces
5195 check_super_interface_access(ik, CHECK);
5196
5197 // check if this class overrides any final method
5198 check_final_method_override(ik, CHECK);
5219
5220 assert(_all_mirandas != nullptr, "invariant");
5221
5222 // Generate any default methods - default methods are public interface methods
5223 // that have a default implementation. This is new with Java 8.
5224 if (_has_nonstatic_concrete_methods) {
5225 DefaultMethods::generate_default_methods(ik,
5226 _all_mirandas,
5227 CHECK);
5228 }
5229
5230 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5231 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5232 !module_entry->has_default_read_edges()) {
5233 if (!module_entry->set_has_default_read_edges()) {
5234 // We won a potential race
5235 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5236 }
5237 }
5238
5239 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5240
5241 if (!is_internal()) {
5242 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5243
5244 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5245 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5246 log_is_enabled(Info, class, preview)) {
5247 ResourceMark rm;
5248 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5249 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5250 }
5251
5252 if (log_is_enabled(Debug, class, resolve)) {
5253 ResourceMark rm;
5254 // print out the superclass.
5255 const char * from = ik->external_name();
5256 if (ik->super() != nullptr) {
5257 log_debug(class, resolve)("%s %s (super)",
5258 from,
5299 const ClassLoadInfo* cl_info,
5300 Publicity pub_level,
5301 TRAPS) :
5302 _stream(stream),
5303 _class_name(nullptr),
5304 _loader_data(loader_data),
5305 _is_hidden(cl_info->is_hidden()),
5306 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5307 _orig_cp_size(0),
5308 _static_oop_count(0),
5309 _super_klass(),
5310 _cp(nullptr),
5311 _fieldinfo_stream(nullptr),
5312 _fieldinfo_search_table(nullptr),
5313 _fields_status(nullptr),
5314 _methods(nullptr),
5315 _inner_classes(nullptr),
5316 _nest_members(nullptr),
5317 _nest_host(0),
5318 _permitted_subclasses(nullptr),
5319 _record_components(nullptr),
5320 _local_interfaces(nullptr),
5321 _transitive_interfaces(nullptr),
5322 _combined_annotations(nullptr),
5323 _class_annotations(nullptr),
5324 _class_type_annotations(nullptr),
5325 _fields_annotations(nullptr),
5326 _fields_type_annotations(nullptr),
5327 _klass(nullptr),
5328 _klass_to_deallocate(nullptr),
5329 _parsed_annotations(nullptr),
5330 _field_info(nullptr),
5331 _temp_field_info(nullptr),
5332 _method_ordering(nullptr),
5333 _all_mirandas(nullptr),
5334 _vtable_size(0),
5335 _itable_size(0),
5336 _num_miranda_methods(0),
5337 _protection_domain(cl_info->protection_domain()),
5338 _access_flags(),
5339 _pub_level(pub_level),
5340 _bad_constant_seen(0),
5341 _synthetic_flag(false),
5342 _sde_length(false),
5343 _sde_buffer(nullptr),
5344 _sourcefile_index(0),
5345 _generic_signature_index(0),
5346 _major_version(0),
5347 _minor_version(0),
5348 _this_class_index(0),
5349 _super_class_index(0),
5350 _itfs_len(0),
5351 _java_fields_count(0),
5352 _need_verify(false),
5353 _has_nonstatic_concrete_methods(false),
5354 _declares_nonstatic_concrete_methods(false),
5355 _has_localvariable_table(false),
5356 _has_final_method(false),
5357 _has_contended_fields(false),
5358 _has_aot_runtime_setup_method(false),
5359 _has_finalizer(false),
5360 _has_empty_finalizer(false),
5361 _max_bootstrap_specifier_index(-1) {
5362
5363 _class_name = name != nullptr ? name : vmSymbols::unknown_class_name();
5364 _class_name->increment_refcount();
5365
5366 assert(_loader_data != nullptr, "invariant");
5367 assert(stream != nullptr, "invariant");
5368 assert(_stream != nullptr, "invariant");
5369 assert(_stream->buffer() == _stream->current(), "invariant");
5370 assert(_class_name != nullptr, "invariant");
5371 assert(0 == _access_flags.as_unsigned_short(), "invariant");
5372
5373 // Figure out whether we can skip format checking (matching classic VM behavior)
5374 // Always verify CFLH bytes from the user agents.
5375 _need_verify = stream->from_class_file_load_hook() ? true : Verifier::should_verify_for(_loader_data->class_loader());
5376
5377 // synch back verification state to stream to check for truncation.
5378 stream->set_need_verify(_need_verify);
5379
5380 parse_stream(stream, CHECK);
5381
5382 post_process_parsed_stream(stream, _cp, CHECK);
5383 }
5384
5385 void ClassFileParser::clear_class_metadata() {
5386 // metadata created before the instance klass is created. Must be
5387 // deallocated if classfile parsing returns an error.
5388 _cp = nullptr;
5389 _fieldinfo_stream = nullptr;
5390 _fieldinfo_search_table = nullptr;
5391 _fields_status = nullptr;
5392 _methods = nullptr;
5393 _inner_classes = nullptr;
5394 _nest_members = nullptr;
5395 _permitted_subclasses = nullptr;
5396 _combined_annotations = nullptr;
5397 _class_annotations = _class_type_annotations = nullptr;
5398 _fields_annotations = _fields_type_annotations = nullptr;
5399 _record_components = nullptr;
5400 }
5401
5402 // Destructor to clean up
5403 ClassFileParser::~ClassFileParser() {
5404 _class_name->decrement_refcount();
5405
5406 if (_cp != nullptr) {
5407 MetadataFactory::free_metadata(_loader_data, _cp);
5408 }
5409
5410 if (_fieldinfo_stream != nullptr) {
5411 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_stream);
5412 }
5413 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_search_table);
5414
5415 if (_fields_status != nullptr) {
5416 MetadataFactory::free_array<FieldStatus>(_loader_data, _fields_status);
5417 }
5418
5419 if (_methods != nullptr) {
5420 // Free methods
5421 InstanceKlass::deallocate_methods(_loader_data, _methods);
5422 }
5423
5424 // beware of the Universe::empty_blah_array!!
5425 if (_inner_classes != nullptr && _inner_classes != Universe::the_empty_short_array()) {
5426 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5427 }
5428
5429 if (_nest_members != nullptr && _nest_members != Universe::the_empty_short_array()) {
5430 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5431 }
5432
5433 if (_record_components != nullptr) {
5434 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5435 }
5436
5437 if (_permitted_subclasses != nullptr && _permitted_subclasses != Universe::the_empty_short_array()) {
5438 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5439 }
5440
5441 // Free interfaces
5442 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5443 _local_interfaces, _transitive_interfaces);
5444
5445 if (_combined_annotations != nullptr) {
5446 // After all annotations arrays have been created, they are installed into the
5447 // Annotations object that will be assigned to the InstanceKlass being created.
5448
5449 // Deallocate the Annotations object and the installed annotations arrays.
5450 _combined_annotations->deallocate_contents(_loader_data);
5451
5452 // If the _combined_annotations pointer is non-null,
5453 // then the other annotations fields should have been cleared.
5454 assert(_class_annotations == nullptr, "Should have been cleared");
5455 assert(_class_type_annotations == nullptr, "Should have been cleared");
5456 assert(_fields_annotations == nullptr, "Should have been cleared");
5457 assert(_fields_type_annotations == nullptr, "Should have been cleared");
5458 } else {
5459 // If the annotations arrays were not installed into the Annotations object,
5460 // then they have to be deallocated explicitly.
5520
5521 assert(cp_size == (u2)cp->length(), "invariant");
5522
5523 // ACCESS FLAGS
5524 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5525
5526 // Access flags
5527 u2 flags;
5528 // JVM_ACC_MODULE is defined in JDK-9 and later.
5529 if (_major_version >= JAVA_9_VERSION) {
5530 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5531 } else {
5532 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5533 }
5534
5535 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5536 // Set abstract bit for old class files for backward compatibility
5537 flags |= JVM_ACC_ABSTRACT;
5538 }
5539
5540 verify_legal_class_modifiers(flags, nullptr, false, CHECK);
5541
5542 short bad_constant = class_bad_constant_seen();
5543 if (bad_constant != 0) {
5544 // Do not throw CFE until after the access_flags are checked because if
5545 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5546 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5547 return;
5548 }
5549
5550 _access_flags.set_flags(flags);
5551
5552 // This class and superclass
5553 _this_class_index = stream->get_u2_fast();
5554 guarantee_property(
5555 valid_cp_range(_this_class_index, cp_size) &&
5556 cp->tag_at(_this_class_index).is_unresolved_klass(),
5557 "Invalid this class index %u in constant pool in class file %s",
5558 _this_class_index, CHECK);
5559
5623 }
5624 ls.cr();
5625 }
5626 }
5627
5628 // SUPERKLASS
5629 _super_class_index = stream->get_u2_fast();
5630 check_super_class(cp,
5631 _super_class_index,
5632 _need_verify,
5633 CHECK);
5634
5635 // Interfaces
5636 _itfs_len = stream->get_u2_fast();
5637 parse_interfaces(stream,
5638 _itfs_len,
5639 cp,
5640 &_has_nonstatic_concrete_methods,
5641 CHECK);
5642
5643 assert(_local_interfaces != nullptr, "invariant");
5644
5645 // Fields (offsets are filled in later)
5646 parse_fields(stream,
5647 _access_flags.is_interface(),
5648 cp,
5649 cp_size,
5650 &_java_fields_count,
5651 CHECK);
5652
5653 assert(_temp_field_info != nullptr, "invariant");
5654
5655 // Methods
5656 parse_methods(stream,
5657 _access_flags.is_interface(),
5658 &_has_localvariable_table,
5659 &_has_final_method,
5660 &_declares_nonstatic_concrete_methods,
5661 CHECK);
5662
5663 assert(_methods != nullptr, "invariant");
5664
5665 if (_declares_nonstatic_concrete_methods) {
5666 _has_nonstatic_concrete_methods = true;
5667 }
5668
5669 // Additional attributes/annotations
5670 _parsed_annotations = new ClassAnnotationCollector();
5671 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5672
5673 assert(_inner_classes != nullptr, "invariant");
5674
5675 // Finalize the Annotations metadata object,
5676 // now that all annotation arrays have been created.
5677 create_combined_annotations(CHECK);
5725 }
5726
5727 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5728 ConstantPool* cp,
5729 TRAPS) {
5730 assert(stream != nullptr, "invariant");
5731 assert(stream->at_eos(), "invariant");
5732 assert(cp != nullptr, "invariant");
5733 assert(_loader_data != nullptr, "invariant");
5734
5735 if (_class_name == vmSymbols::java_lang_Object()) {
5736 precond(_super_class_index == 0);
5737 precond(_super_klass == nullptr);
5738 guarantee_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
5739 "java.lang.Object cannot implement an interface in class file %s",
5740 CHECK);
5741 } else {
5742 // Set _super_klass after class file is parsed and format is checked
5743 assert(_super_class_index > 0, "any class other than Object must have a super class");
5744 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5745 if (_access_flags.is_interface()) {
5746 // Before attempting to resolve the superclass, check for class format
5747 // errors not checked yet.
5748 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5749 "Interfaces must have java.lang.Object as superclass in class file %s",
5750 CHECK);
5751 }
5752 Handle loader(THREAD, _loader_data->class_loader());
5753 if (loader.is_null() && super_class_name == vmSymbols::java_lang_Object()) {
5754 // fast path to avoid lookup
5755 _super_klass = vmClasses::Object_klass();
5756 } else {
5757 _super_klass = (const InstanceKlass*)
5758 SystemDictionary::resolve_super_or_fail(_class_name,
5759 super_class_name,
5760 loader,
5761 true,
5762 CHECK);
5763 }
5764 }
5765
5766 if (_super_klass != nullptr) {
5767 if (_super_klass->has_nonstatic_concrete_methods()) {
5768 _has_nonstatic_concrete_methods = true;
5769 }
5770
5771 if (_super_klass->is_interface()) {
5772 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
5773 return;
5774 }
5775 }
5776
5777 // Compute the transitive list of all unique interfaces implemented by this class
5778 _transitive_interfaces =
5779 compute_transitive_interfaces(_super_klass,
5780 _local_interfaces,
5781 _loader_data,
5782 CHECK);
5783
5784 assert(_transitive_interfaces != nullptr, "invariant");
5785
5786 // sort methods
5787 _method_ordering = sort_methods(_methods);
5788
5789 _all_mirandas = new GrowableArray<Method*>(20);
5790
5791 Handle loader(THREAD, _loader_data->class_loader());
5792 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5793 &_num_miranda_methods,
5794 _all_mirandas,
5795 _super_klass,
5796 _methods,
5797 _access_flags,
5798 _major_version,
5799 loader,
5800 _class_name,
5801 _local_interfaces);
5802
5803 // Size of Java itable (in words)
5804 _itable_size = _access_flags.is_interface() ? 0 :
5805 klassItable::compute_itable_size(_transitive_interfaces);
5806
5807 assert(_parsed_annotations != nullptr, "invariant");
5808
5809 _field_info = new FieldLayoutInfo();
5810 FieldLayoutBuilder lb(class_name(), super_klass(), _cp, /*_fields*/ _temp_field_info,
5811 _parsed_annotations->is_contended(), _field_info);
5812 lb.build_layout();
5813
5814 int injected_fields_count = _temp_field_info->length() - _java_fields_count;
5815 _fieldinfo_stream =
5816 FieldInfoStream::create_FieldInfoStream(_temp_field_info, _java_fields_count,
5817 injected_fields_count, loader_data(), CHECK);
5818 _fieldinfo_search_table = FieldInfoStream::create_search_table(_cp, _fieldinfo_stream, _loader_data, CHECK);
5819 _fields_status =
5820 MetadataFactory::new_array<FieldStatus>(_loader_data, _temp_field_info->length(),
5821 FieldStatus(0), CHECK);
5822 }
5823
5824 void ClassFileParser::set_klass(InstanceKlass* klass) {
5825
5826 #ifdef ASSERT
5827 if (klass != nullptr) {
5828 assert(nullptr == _klass, "leaking?");
5829 }
5830 #endif
5831
5832 _klass = klass;
5833 }
5834
5835 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5836
5837 #ifdef ASSERT
5838 if (klass != nullptr) {
5839 assert(nullptr == _klass_to_deallocate, "leaking?");
5840 }
5841 #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/bsmAttribute.inline.hpp"
52 #include "oops/constantPool.inline.hpp"
53 #include "oops/fieldInfo.hpp"
54 #include "oops/fieldStreams.inline.hpp"
55 #include "oops/inlineKlass.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceMirrorKlass.hpp"
58 #include "oops/klass.inline.hpp"
59 #include "oops/klassVtable.hpp"
60 #include "oops/metadata.hpp"
61 #include "oops/method.inline.hpp"
62 #include "oops/oop.inline.hpp"
63 #include "oops/recordComponent.hpp"
64 #include "oops/symbol.hpp"
65 #include "prims/jvmtiExport.hpp"
66 #include "prims/jvmtiThreadState.hpp"
67 #include "runtime/arguments.hpp"
68 #include "runtime/fieldDescriptor.inline.hpp"
69 #include "runtime/handles.inline.hpp"
70 #include "runtime/javaCalls.hpp"
71 #include "runtime/os.hpp"
72 #include "runtime/perfData.hpp"
73 #include "runtime/reflection.hpp"
74 #include "runtime/safepointVerifiers.hpp"
75 #include "runtime/signature.hpp"
76 #include "runtime/timer.hpp"
77 #include "services/classLoadingService.hpp"
78 #include "services/threadService.hpp"
79 #include "utilities/align.hpp"
80 #include "utilities/bitMap.inline.hpp"
81 #include "utilities/checkedCast.hpp"
82 #include "utilities/copy.hpp"
83 #include "utilities/exceptions.hpp"
84 #include "utilities/formatBuffer.hpp"
85 #include "utilities/globalDefinitions.hpp"
86 #include "utilities/growableArray.hpp"
87 #include "utilities/hashTable.hpp"
88 #include "utilities/macros.hpp"
89 #include "utilities/ostream.hpp"
90 #include "utilities/stringUtils.hpp"
91 #include "utilities/utf8.hpp"
92 #if INCLUDE_CDS
93 #include "classfile/systemDictionaryShared.hpp"
94 #endif
95
96 // We generally try to create the oops directly when parsing, rather than
97 // allocating temporary data structures and copying the bytes twice. A
98 // temporary area is only needed when parsing utf8 entries in the constant
99 // pool and when parsing line number tables.
100
101 // We add assert in debug mode when class format is not checked.
102
103 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
104 #define JAVA_MIN_SUPPORTED_VERSION 45
105 #define JAVA_PREVIEW_MINOR_VERSION 65535
106
107 // Used for two backward compatibility reasons:
108 // - to check for new additions to the class file format in JDK1.5
109 // - to check for bug fixes in the format checker in JDK1.5
110 #define JAVA_1_5_VERSION 49
142 #define JAVA_18_VERSION 62
143
144 #define JAVA_19_VERSION 63
145
146 #define JAVA_20_VERSION 64
147
148 #define JAVA_21_VERSION 65
149
150 #define JAVA_22_VERSION 66
151
152 #define JAVA_23_VERSION 67
153
154 #define JAVA_24_VERSION 68
155
156 #define JAVA_25_VERSION 69
157
158 #define JAVA_26_VERSION 70
159
160 #define JAVA_27_VERSION 71
161
162 #define CONSTANT_CLASS_DESCRIPTORS 71
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 (Arguments::is_valhalla_enabled()) {
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) {
3507 cp->bsm_entries().end_extension(iter, _loader_data, CHECK);
3508 guarantee_property(current_before_parsing + attribute_byte_length == cfs->current(),
3509 "Bad length on BootstrapMethods in class file %s",
3510 CHECK);
3511 }
3512
3513 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3514 ConstantPool* cp,
3515 ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3516 TRAPS) {
3517 assert(cfs != nullptr, "invariant");
3518 assert(cp != nullptr, "invariant");
3519 assert(parsed_annotations != nullptr, "invariant");
3520
3521 // Set inner classes attribute to default sentinel
3522 _inner_classes = Universe::the_empty_short_array();
3523 // Set nest members attribute to default sentinel
3524 _nest_members = Universe::the_empty_short_array();
3525 // Set _permitted_subclasses attribute to default sentinel
3526 _permitted_subclasses = Universe::the_empty_short_array();
3527 // Set _loadable_descriptors attribute to default sentinel
3528 _loadable_descriptors = Universe::the_empty_short_array();
3529 cfs->guarantee_more(2, CHECK); // attributes_count
3530 u2 attributes_count = cfs->get_u2_fast();
3531 bool parsed_sourcefile_attribute = false;
3532 bool parsed_innerclasses_attribute = false;
3533 bool parsed_nest_members_attribute = false;
3534 bool parsed_permitted_subclasses_attribute = false;
3535 bool parsed_loadable_descriptors_attribute = false;
3536 bool parsed_nest_host_attribute = false;
3537 bool parsed_record_attribute = false;
3538 bool parsed_enclosingmethod_attribute = false;
3539 bool parsed_bootstrap_methods_attribute = false;
3540 const u1* runtime_visible_annotations = nullptr;
3541 int runtime_visible_annotations_length = 0;
3542 const u1* runtime_visible_type_annotations = nullptr;
3543 int runtime_visible_type_annotations_length = 0;
3544 bool runtime_invisible_type_annotations_exists = false;
3545 bool runtime_invisible_annotations_exists = false;
3546 bool parsed_source_debug_ext_annotations_exist = false;
3547 const u1* inner_classes_attribute_start = nullptr;
3548 u4 inner_classes_attribute_length = 0;
3549 u2 enclosing_method_class_index = 0;
3550 u2 enclosing_method_method_index = 0;
3551 const u1* nest_members_attribute_start = nullptr;
3552 u4 nest_members_attribute_length = 0;
3553 const u1* record_attribute_start = nullptr;
3554 u4 record_attribute_length = 0;
3555 const u1* permitted_subclasses_attribute_start = nullptr;
3556 u4 permitted_subclasses_attribute_length = 0;
3557 const u1* loadable_descriptors_attribute_start = nullptr;
3558 u4 loadable_descriptors_attribute_length = 0;
3559
3560 // Iterate over attributes
3561 while (attributes_count--) {
3562 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
3563 const u2 attribute_name_index = cfs->get_u2_fast();
3564 const u4 attribute_length = cfs->get_u4_fast();
3565 guarantee_property(
3566 valid_symbol_at(attribute_name_index),
3567 "Attribute name has bad constant pool index %u in class file %s",
3568 attribute_name_index, CHECK);
3569 const Symbol* const tag = cp->symbol_at(attribute_name_index);
3570 if (tag == vmSymbols::tag_source_file()) {
3571 // Check for SourceFile tag
3572 if (_need_verify) {
3573 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3574 }
3575 if (parsed_sourcefile_attribute) {
3576 classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3577 return;
3578 } else {
3754 return;
3755 }
3756 parsed_record_attribute = true;
3757 record_attribute_start = cfs->current();
3758 record_attribute_length = attribute_length;
3759 } else if (_major_version >= JAVA_17_VERSION) {
3760 if (tag == vmSymbols::tag_permitted_subclasses()) {
3761 if (parsed_permitted_subclasses_attribute) {
3762 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3763 return;
3764 }
3765 // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3766 if (_access_flags.is_final()) {
3767 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3768 return;
3769 }
3770 parsed_permitted_subclasses_attribute = true;
3771 permitted_subclasses_attribute_start = cfs->current();
3772 permitted_subclasses_attribute_length = attribute_length;
3773 }
3774 if (Arguments::is_valhalla_enabled() && tag == vmSymbols::tag_loadable_descriptors()) {
3775 if (parsed_loadable_descriptors_attribute) {
3776 classfile_parse_error("Multiple LoadableDescriptors attributes in class file %s", CHECK);
3777 return;
3778 }
3779 parsed_loadable_descriptors_attribute = true;
3780 loadable_descriptors_attribute_start = cfs->current();
3781 loadable_descriptors_attribute_length = attribute_length;
3782 }
3783 }
3784 // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3785 cfs->skip_u1(attribute_length, CHECK);
3786 } else {
3787 // Unknown attribute
3788 cfs->skip_u1(attribute_length, CHECK);
3789 }
3790 } else {
3791 // Unknown attribute
3792 cfs->skip_u1(attribute_length, CHECK);
3793 }
3794 } else {
3795 // Unknown attribute
3796 cfs->skip_u1(attribute_length, CHECK);
3797 }
3798 }
3799 _class_annotations = allocate_annotations(runtime_visible_annotations,
3800 runtime_visible_annotations_length,
3801 CHECK);
3802 _class_type_annotations = allocate_annotations(runtime_visible_type_annotations,
3839 CHECK);
3840 if (_need_verify) {
3841 guarantee_property(record_attribute_length == calculated_attr_length,
3842 "Record attribute has wrong length in class file %s",
3843 CHECK);
3844 }
3845 }
3846
3847 if (parsed_permitted_subclasses_attribute) {
3848 const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3849 cfs,
3850 permitted_subclasses_attribute_start,
3851 CHECK);
3852 if (_need_verify) {
3853 guarantee_property(
3854 permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3855 "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3856 }
3857 }
3858
3859 if (parsed_loadable_descriptors_attribute) {
3860 const u2 num_classes = parse_classfile_loadable_descriptors_attribute(
3861 cfs,
3862 loadable_descriptors_attribute_start,
3863 CHECK);
3864 if (_need_verify) {
3865 guarantee_property(
3866 loadable_descriptors_attribute_length == sizeof(num_classes) + sizeof(u2) * num_classes,
3867 "Wrong LoadableDescriptors attribute length in class file %s", CHECK);
3868 }
3869 }
3870
3871 if (_max_bootstrap_specifier_index >= 0) {
3872 guarantee_property(parsed_bootstrap_methods_attribute,
3873 "Missing BootstrapMethods attribute in class file %s", CHECK);
3874 }
3875 }
3876
3877 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3878 assert(k != nullptr, "invariant");
3879
3880 if (_synthetic_flag)
3881 k->set_is_synthetic();
3882 if (_sourcefile_index != 0) {
3883 k->set_source_file_name_index(_sourcefile_index);
3884 }
3885 if (_generic_signature_index != 0) {
3886 k->set_generic_signature_index(_generic_signature_index);
3887 }
3888 if (_sde_buffer != nullptr) {
3889 k->set_source_debug_extension(_sde_buffer, _sde_length);
3890 }
3917 _class_type_annotations = nullptr;
3918 _fields_annotations = nullptr;
3919 _fields_type_annotations = nullptr;
3920 }
3921
3922 // Transfer ownership of metadata allocated to the InstanceKlass.
3923 void ClassFileParser::apply_parsed_class_metadata(
3924 InstanceKlass* this_klass,
3925 int java_fields_count) {
3926 assert(this_klass != nullptr, "invariant");
3927
3928 _cp->set_pool_holder(this_klass);
3929 this_klass->set_constants(_cp);
3930 this_klass->set_fieldinfo_stream(_fieldinfo_stream);
3931 this_klass->set_fieldinfo_search_table(_fieldinfo_search_table);
3932 this_klass->set_fields_status(_fields_status);
3933 this_klass->set_methods(_methods);
3934 this_klass->set_inner_classes(_inner_classes);
3935 this_klass->set_nest_members(_nest_members);
3936 this_klass->set_nest_host_index(_nest_host);
3937 this_klass->set_loadable_descriptors(_loadable_descriptors);
3938 this_klass->set_annotations(_combined_annotations);
3939 this_klass->set_permitted_subclasses(_permitted_subclasses);
3940 this_klass->set_record_components(_record_components);
3941 this_klass->set_inline_layout_info_array(_inline_layout_info_array);
3942
3943 DEBUG_ONLY(FieldInfoStream::validate_search_table(_cp, _fieldinfo_stream, _fieldinfo_search_table));
3944
3945 // Delay the setting of _local_interfaces and _transitive_interfaces until after
3946 // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3947 // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3948 // its _super. If an OOM occurs while loading the current klass, its _super field
3949 // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3950 // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3951 // dereferences to the deallocated _transitive_interfaces will result in a crash.
3952
3953 // Clear out these fields so they don't get deallocated by the destructor
3954 clear_class_metadata();
3955 }
3956
3957 AnnotationArray* ClassFileParser::allocate_annotations(const u1* const anno,
3958 int anno_length,
3959 TRAPS) {
3960 AnnotationArray* annotations = nullptr;
3961 if (anno != nullptr) {
3962 annotations = MetadataFactory::new_array<u1>(_loader_data,
3963 anno_length,
3964 CHECK_(annotations));
3965 for (int i = 0; i < anno_length; i++) {
3966 annotations->at_put(i, anno[i]);
3967 }
3968 }
3969 return annotations;
3970 }
3971
3972 void ClassFileParser::check_super_class(ConstantPool* const cp,
3973 const int super_class_index,
3974 const bool need_verify,
3975 TRAPS) {
3976 assert(cp != nullptr, "invariant");
3977
3978 if (super_class_index == 0) {
3979 guarantee_property(_class_name == vmSymbols::java_lang_Object(),
3980 "Invalid superclass index 0 in class file %s",
3981 CHECK);
3982 } else {
3983 guarantee_property(valid_klass_reference_at(super_class_index),
3984 "Invalid superclass index %u in class file %s",
3985 super_class_index,
3986 CHECK);
3987
3988 // The class name should be legal because it is checked when parsing constant pool.
3989 // However, make sure it is not an array type.
3990 if (need_verify) {
3991 guarantee_property(cp->klass_name_at(super_class_index)->char_at(0) != JVM_SIGNATURE_ARRAY,
3992 "Bad superclass name in class file %s", CHECK);
3993 }
3994 }
3995 }
3996
3997 OopMapBlocksBuilder::OopMapBlocksBuilder(unsigned int max_blocks) {
3998 _max_nonstatic_oop_maps = max_blocks;
3999 _nonstatic_oop_map_count = 0;
4000 if (max_blocks == 0) {
4152 // See documentation of InstanceKlass::can_be_fastpath_allocated().
4153 assert(ik->size_helper() > 0, "layout_helper is initialized");
4154 if (ik->is_abstract() || ik->is_interface()
4155 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == nullptr)
4156 || ik->size_helper() >= FastAllocateSizeLimit) {
4157 // Forbid fast-path allocation.
4158 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4159 ik->set_layout_helper(lh);
4160 }
4161
4162 // Propagate the AOT runtimeSetup method discovery
4163 if (_has_aot_runtime_setup_method) {
4164 ik->set_is_runtime_setup_required();
4165 if (log_is_enabled(Info, aot, init)) {
4166 ResourceMark rm;
4167 log_info(aot, init)("Found @AOTRuntimeSetup class %s", ik->external_name());
4168 }
4169 }
4170 }
4171
4172 bool ClassFileParser::supports_inline_types() const {
4173 // Inline types are only supported by class file version 71.65535 and later
4174 return _major_version > JAVA_27_VERSION ||
4175 (_major_version == JAVA_27_VERSION && _minor_version == JAVA_PREVIEW_MINOR_VERSION);
4176 }
4177
4178 // utility methods for appending an array with check for duplicates
4179
4180 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4181 const Array<InstanceKlass*>* const ifs) {
4182 // iterate over new interfaces
4183 for (int i = 0; i < ifs->length(); i++) {
4184 InstanceKlass* const e = ifs->at(i);
4185 assert(e->is_klass() && e->is_interface(), "just checking");
4186 // add new interface
4187 result->append_if_missing(e);
4188 }
4189 }
4190
4191 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4192 Array<InstanceKlass*>* local_ifs,
4193 ClassLoaderData* loader_data,
4194 TRAPS) {
4195 assert(local_ifs != nullptr, "invariant");
4196 assert(loader_data != nullptr, "invariant");
4197
4201 // Add superclass transitive interfaces size
4202 if (super != nullptr) {
4203 super_size = super->transitive_interfaces()->length();
4204 max_transitive_size += super_size;
4205 }
4206 // Add local interfaces' super interfaces
4207 const int local_size = local_ifs->length();
4208 for (int i = 0; i < local_size; i++) {
4209 InstanceKlass* const l = local_ifs->at(i);
4210 max_transitive_size += l->transitive_interfaces()->length();
4211 }
4212 // Finally add local interfaces
4213 max_transitive_size += local_size;
4214 // Construct array
4215 if (max_transitive_size == 0) {
4216 // no interfaces, use canonicalized array
4217 return Universe::the_empty_instance_klass_array();
4218 } else if (max_transitive_size == super_size) {
4219 // no new local interfaces added, share superklass' transitive interface array
4220 return super->transitive_interfaces();
4221 // The three lines below are commented to work around bug JDK-8245487
4222 // } else if (max_transitive_size == local_size) {
4223 // // only local interfaces added, share local interface array
4224 // return local_ifs;
4225 } else {
4226 ResourceMark rm;
4227 GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4228
4229 // Copy down from superclass
4230 if (super != nullptr) {
4231 append_interfaces(result, super->transitive_interfaces());
4232 }
4233
4234 // Copy down from local interfaces' superinterfaces
4235 for (int i = 0; i < local_size; i++) {
4236 InstanceKlass* const l = local_ifs->at(i);
4237 append_interfaces(result, l->transitive_interfaces());
4238 }
4239 // Finally add local interfaces
4240 append_interfaces(result, local_ifs);
4241
4242 // length will be less than the max_transitive_size if duplicates were removed
4243 const int length = result->length();
4244 assert(length <= max_transitive_size, "just checking");
4245
4246 Array<InstanceKlass*>* const new_result =
4247 MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4248 for (int i = 0; i < length; i++) {
4249 InstanceKlass* const e = result->at(i);
4250 assert(e != nullptr, "just checking");
4251 new_result->at_put(i, e);
4252 }
4253 return new_result;
4254 }
4255 }
4256
4257 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4258 assert(this_klass != nullptr, "invariant");
4259 const InstanceKlass* const super = this_klass->super();
4260
4261 if (super != nullptr) {
4262 if (super->is_final()) {
4263 classfile_icce_error("class %s cannot inherit from final class %s", super, THREAD);
4264 return;
4265 }
4266
4267 if (super->is_sealed()) {
4268 stringStream ss;
4269 ResourceMark rm(THREAD);
4270 if (!super->has_as_permitted_subclass(this_klass, ss)) {
4271 classfile_icce_error(ss.as_string(), THREAD);
4272 return;
4273 }
4274 }
4275
4276 // The JVMS says that super classes for value types must not have the ACC_IDENTITY
4277 // flag set. But, java.lang.Object must still be allowed to be a direct super class
4278 // for a value classes. So, it is treated as a special case for now.
4279 if (!this_klass->access_flags().is_identity_class() &&
4280 super->name() != vmSymbols::java_lang_Object() &&
4281 super->is_identity_class()) {
4282 classfile_icce_error("value class %s cannot inherit from class %s", super, THREAD);
4283 return;
4284 }
4285
4286 Reflection::VerifyClassAccessResults vca_result =
4287 Reflection::verify_class_access(this_klass, super, false);
4288 if (vca_result != Reflection::ACCESS_OK) {
4289 ResourceMark rm(THREAD);
4290 char* msg = Reflection::verify_class_access_msg(this_klass,
4291 super,
4292 vca_result);
4293
4294 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4295 if (msg == nullptr) {
4296 bool same_module = (this_klass->module() == super->module());
4297 Exceptions::fthrow(
4298 THREAD_AND_LOCATION,
4299 vmSymbols::java_lang_IllegalAccessError(),
4300 "class %s cannot access its %ssuperclass %s (%s%s%s)",
4301 this_klass->external_name(),
4302 super->is_abstract() ? "abstract " : "",
4303 super->external_name(),
4304 (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4305 (same_module) ? "" : "; ",
4458 // Verify the class modifiers for the current class, or an inner class if inner_name is non-null.
4459 void ClassFileParser::verify_legal_class_modifiers(jint flags, Symbol* inner_name, bool is_anonymous_inner_class, TRAPS) const {
4460 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4461 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4462 if (is_module) {
4463 ResourceMark rm(THREAD);
4464 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4465 Exceptions::fthrow(
4466 THREAD_AND_LOCATION,
4467 vmSymbols::java_lang_NoClassDefFoundError(),
4468 "%s is not a class because access_flag ACC_MODULE is set",
4469 _class_name->as_C_string());
4470 return;
4471 }
4472
4473 if (!_need_verify) { return; }
4474
4475 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
4476 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4477 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4478 const bool is_identity = (flags & JVM_ACC_IDENTITY) != 0;
4479 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4480 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4481 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4482 const bool valid_value_class = is_identity || is_interface ||
4483 (supports_inline_types() && (!is_identity && (is_abstract || is_final)));
4484
4485 if ((is_abstract && is_final) ||
4486 (is_interface && !is_abstract) ||
4487 (is_interface && major_gte_1_5 && (is_identity || is_enum)) || // ACC_SUPER (now ACC_IDENTITY) was illegal for interfaces
4488 (!is_interface && major_gte_1_5 && is_annotation) ||
4489 (!valid_value_class)) {
4490 ResourceMark rm(THREAD);
4491 const char* class_note = "";
4492 if (!valid_value_class) {
4493 class_note = " (a value class must be final or else abstract)";
4494 }
4495 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4496 if (inner_name == nullptr && !is_anonymous_inner_class) {
4497 Exceptions::fthrow(
4498 THREAD_AND_LOCATION,
4499 vmSymbols::java_lang_ClassFormatError(),
4500 "Illegal class modifiers in class %s: 0x%X",
4501 _class_name->as_C_string(), flags
4502 );
4503 } else {
4504 if (is_anonymous_inner_class) {
4505 Exceptions::fthrow(
4506 THREAD_AND_LOCATION,
4507 vmSymbols::java_lang_ClassFormatError(),
4508 "Illegal class modifiers in anonymous inner class of class %s: 0x%X",
4509 _class_name->as_C_string(), flags
4510 );
4511 } else {
4512 Exceptions::fthrow(
4513 THREAD_AND_LOCATION,
4514 vmSymbols::java_lang_ClassFormatError(),
4568 THREAD_AND_LOCATION,
4569 vmSymbols::java_lang_UnsupportedClassVersionError(),
4570 "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4571 "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4572 class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4573 return;
4574 }
4575
4576 if (!Arguments::enable_preview()) {
4577 classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4578 class_name, major, minor, THREAD);
4579 return;
4580 }
4581
4582 } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4583 classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4584 class_name, major, minor, THREAD);
4585 }
4586 }
4587
4588 void ClassFileParser:: verify_legal_field_modifiers(jint flags,
4589 AccessFlags class_access_flags,
4590 TRAPS) const {
4591 if (!_need_verify) { return; }
4592
4593 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4594 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4595 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4596 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4597 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4598 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
4599 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4600 const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
4601 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4602 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4603
4604 const bool is_interface = class_access_flags.is_interface();
4605 const bool is_identity_class = class_access_flags.is_identity_class();
4606
4607 bool is_illegal = false;
4608 const char* error_msg = "";
4609
4610 // There is some overlap in the checks that apply, for example interface fields
4611 // must be static, static fields can't be strict, and therefore interfaces can't
4612 // have strict fields. So we don't have to check every possible invalid combination
4613 // individually as long as all are covered. Once we have found an illegal combination
4614 // we can stop checking.
4615
4616 if (!is_illegal) {
4617 if (is_interface) {
4618 if (!is_public || !is_static || !is_final || is_private ||
4619 is_protected || is_volatile || is_transient ||
4620 (major_gte_1_5 && is_enum)) {
4621 is_illegal = true;
4622 error_msg = "interface fields must be public, static and final, and may be synthetic";
4623 }
4624 } else { // not interface
4625 if (has_illegal_visibility(flags)) {
4626 is_illegal = true;
4627 error_msg = "invalid visibility flags for class field";
4628 } else if (is_final && is_volatile) {
4629 is_illegal = true;
4630 error_msg = "fields cannot be final and volatile";
4631 } else if (supports_inline_types()) {
4632 if (!is_identity_class && !is_static && (!is_strict || !is_final)) {
4633 is_illegal = true;
4634 error_msg = "value class fields must be either non-static final and strict, or static";
4635 }
4636 }
4637 }
4638 }
4639
4640 if (is_illegal) {
4641 ResourceMark rm(THREAD);
4642 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4643 Exceptions::fthrow(
4644 THREAD_AND_LOCATION,
4645 vmSymbols::java_lang_ClassFormatError(),
4646 "Illegal field modifiers (%s) in class %s: 0x%X",
4647 error_msg, _class_name->as_C_string(), flags);
4648 return;
4649 }
4650 }
4651
4652 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4653 AccessFlags class_access_flags,
4654 const Symbol* name,
4655 TRAPS) const {
4656 if (!_need_verify) { return; }
4657
4658 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
4659 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
4660 const bool is_static = (flags & JVM_ACC_STATIC) != 0;
4661 const bool is_final = (flags & JVM_ACC_FINAL) != 0;
4662 const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
4663 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
4664 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
4665 const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
4666 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4667 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4668 const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4669 const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
4670 const bool major_gte_17 = _major_version >= JAVA_17_VERSION;
4671 const bool is_initializer = (name == vmSymbols::object_initializer_name());
4672 // LW401 CR required: removal of value factories support
4673 const bool is_interface = class_access_flags.is_interface();
4674 const bool is_identity_class = class_access_flags.is_identity_class();
4675 const bool is_abstract_class = class_access_flags.is_abstract();
4676
4677 bool is_illegal = false;
4678
4679 const char* class_note = "";
4680 if (is_interface) {
4681 if (major_gte_8) {
4682 // Class file version is JAVA_8_VERSION or later Methods of
4683 // interfaces may set any of the flags except ACC_PROTECTED,
4684 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4685 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4686 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4687 (is_native || is_protected || is_final || is_synchronized) ||
4688 // If a specific method of a class or interface has its
4689 // ACC_ABSTRACT flag set, it must not have any of its
4690 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4691 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
4692 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4693 // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4694 (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4695 is_illegal = true;
4696 }
4697 } else if (major_gte_1_5) {
4698 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4699 if (!is_public || is_private || is_protected || is_static || is_final ||
4700 is_synchronized || is_native || !is_abstract || is_strict) {
4701 is_illegal = true;
4702 }
4703 } else {
4704 // Class file version is pre-JAVA_1_5_VERSION
4705 if (!is_public || is_static || is_final || is_native || !is_abstract) {
4706 is_illegal = true;
4707 }
4708 }
4709 } else { // not interface
4710 if (has_illegal_visibility(flags)) {
4711 is_illegal = true;
4712 } else {
4713 if (is_initializer) {
4714 if (is_static || is_final || is_synchronized || is_native ||
4715 is_abstract || (major_gte_1_5 && is_bridge)) {
4716 is_illegal = true;
4717 }
4718 } else { // not initializer
4719 if (!is_identity_class && is_synchronized && !is_static) {
4720 is_illegal = true;
4721 class_note = " (not an identity class)";
4722 } else {
4723 if (is_abstract) {
4724 if ((is_final || is_native || is_private || is_static ||
4725 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4726 is_illegal = true;
4727 }
4728 }
4729 }
4730 }
4731 }
4732 }
4733
4734 if (is_illegal) {
4735 ResourceMark rm(THREAD);
4736 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4737 Exceptions::fthrow(
4738 THREAD_AND_LOCATION,
4739 vmSymbols::java_lang_ClassFormatError(),
4740 "Method %s in class %s%s has illegal modifiers: 0x%X",
4741 name->as_C_string(), _class_name->as_C_string(),
4742 class_note, flags);
4743 return;
4744 }
4745 }
4746
4747 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4748 int length,
4749 TRAPS) const {
4750 assert(_need_verify, "only called when _need_verify is true");
4751 // Note: 0 <= length < 64K, as it comes from a u2 entry in the CP.
4752 if (!UTF8::is_legal_utf8(buffer, static_cast<size_t>(length), _major_version <= 47)) {
4753 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4754 }
4755 }
4756
4757 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4758 // In class names, '/' separates unqualified names. This is verified in this function also.
4759 // Method names also may not contain the characters '<' or '>', unless <init>
4760 // or <clinit>. Note that method names may not be <init> or <clinit> in this
4761 // method. Because these names have been checked as special cases before
4762 // calling this method in verify_legal_method_name.
4780 if (type == ClassFileParser::LegalClass) {
4781 if (p == name || p+1 >= name+length ||
4782 *(p+1) == JVM_SIGNATURE_SLASH) {
4783 return false;
4784 }
4785 } else {
4786 return false; // do not permit '/' unless it's class name
4787 }
4788 break;
4789 case JVM_SIGNATURE_SPECIAL:
4790 case JVM_SIGNATURE_ENDSPECIAL:
4791 // do not permit '<' or '>' in method names
4792 if (type == ClassFileParser::LegalMethod) {
4793 return false;
4794 }
4795 }
4796 }
4797 return true;
4798 }
4799
4800 bool ClassFileParser::is_class_in_loadable_descriptors_attribute(Symbol *klass) {
4801 if (_loadable_descriptors == nullptr) return false;
4802 for (int i = 0; i < _loadable_descriptors->length(); i++) {
4803 Symbol* class_name = _cp->symbol_at(_loadable_descriptors->at(i));
4804 if (class_name == klass) return true;
4805 }
4806 return false;
4807 }
4808
4809 // Take pointer to a UTF8 byte string (not NUL-terminated).
4810 // Skip over the longest part of the string that could
4811 // be taken as a fieldname. Allow non-trailing '/'s if slash_ok is true.
4812 // Return a pointer to just past the fieldname.
4813 // Return null if no fieldname at all was found, or in the case of slash_ok
4814 // being true, we saw consecutive slashes (meaning we were looking for a
4815 // qualified path but found something that was badly-formed).
4816 static const char* skip_over_field_name(const char* const name,
4817 bool slash_ok,
4818 unsigned int length) {
4819 const char* p;
4820 jboolean last_is_slash = false;
4821 jboolean not_first_ch = false;
4822
4823 for (p = name; p != name + length; not_first_ch = true) {
4824 const char* old_p = p;
4825 jchar ch = *p;
4826 if (ch < 128) {
4827 p++;
4828 // quick check for ascii
4890 // be taken as a field signature. Allow "void" if void_ok.
4891 // Return a pointer to just past the signature.
4892 // Return null if no legal signature is found.
4893 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4894 bool void_ok,
4895 unsigned int length,
4896 TRAPS) const {
4897 unsigned int array_dim = 0;
4898 while (length > 0) {
4899 switch (signature[0]) {
4900 case JVM_SIGNATURE_VOID: if (!void_ok) { return nullptr; }
4901 case JVM_SIGNATURE_BOOLEAN:
4902 case JVM_SIGNATURE_BYTE:
4903 case JVM_SIGNATURE_CHAR:
4904 case JVM_SIGNATURE_SHORT:
4905 case JVM_SIGNATURE_INT:
4906 case JVM_SIGNATURE_FLOAT:
4907 case JVM_SIGNATURE_LONG:
4908 case JVM_SIGNATURE_DOUBLE:
4909 return signature + 1;
4910 case JVM_SIGNATURE_CLASS:
4911 {
4912 if (_major_version < JAVA_1_5_VERSION) {
4913 signature++;
4914 length--;
4915 // Skip over the class name if one is there
4916 const char* const p = skip_over_field_name(signature, true, length);
4917 assert(p == nullptr || p > signature, "must parse one character at least");
4918 // The next character better be a semicolon
4919 if (p != nullptr && // Parse of field name succeeded.
4920 p - signature < static_cast<int>(length) && // There is at least one character left to parse.
4921 p[0] == JVM_SIGNATURE_ENDCLASS) {
4922 return p + 1;
4923 }
4924 }
4925 else {
4926 // Skip leading 'L' or 'Q' and ignore first appearance of ';'
4927 signature++;
4928 const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4929 // Format check signature
4930 if (c != nullptr) {
4931 int newlen = pointer_delta_as_int(c, (char*) signature);
4932 bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4933 if (!legal) {
4934 classfile_parse_error("Class name is empty or contains illegal character "
4935 "in descriptor in class file %s",
4936 THREAD);
4937 return nullptr;
4938 }
4939 return signature + newlen + 1;
4940 }
4941 }
4942 return nullptr;
4943 }
4944 case JVM_SIGNATURE_ARRAY:
4945 array_dim++;
4946 if (array_dim > 255) {
4962
4963 // Checks if name is a legal class name.
4964 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4965 if (!_need_verify) { return; }
4966
4967 assert(name->refcount() > 0, "symbol must be kept alive");
4968 char* bytes = (char*)name->bytes();
4969 unsigned int length = name->utf8_length();
4970 bool legal = false;
4971
4972 if (length > 0) {
4973 const char* p;
4974 if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4975 p = skip_over_field_signature(bytes, false, length, CHECK);
4976 legal = (p != nullptr) && ((p - bytes) == (int)length);
4977 } else if (_major_version < JAVA_1_5_VERSION) {
4978 if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4979 p = skip_over_field_name(bytes, true, length);
4980 legal = (p != nullptr) && ((p - bytes) == (int)length);
4981 }
4982 } else if ((_major_version >= CONSTANT_CLASS_DESCRIPTORS || _class_name->starts_with("jdk/internal/reflect/"))
4983 && bytes[length - 1] == ';' ) {
4984 // Support for L...; descriptors
4985 legal = verify_unqualified_name(bytes + 1, length - 2, LegalClass);
4986 } else {
4987 // 4900761: relax the constraints based on JSR202 spec
4988 // Class names may be drawn from the entire Unicode character set.
4989 // Identifiers between '/' must be unqualified names.
4990 // The utf8 string has been verified when parsing cpool entries.
4991 legal = verify_unqualified_name(bytes, length, LegalClass);
4992 }
4993 }
4994 if (!legal) {
4995 ResourceMark rm(THREAD);
4996 assert(_class_name != nullptr, "invariant");
4997 // Names are all known to be < 64k so we know this formatted message is not excessively large.
4998 Exceptions::fthrow(
4999 THREAD_AND_LOCATION,
5000 vmSymbols::java_lang_ClassFormatError(),
5001 "Illegal class name \"%.*s\" in class file %s", length, bytes,
5002 _class_name->as_C_string()
5003 );
5004 return;
5005 }
5033 THREAD_AND_LOCATION,
5034 vmSymbols::java_lang_ClassFormatError(),
5035 "Illegal field name \"%.*s\" in class %s", length, bytes,
5036 _class_name->as_C_string()
5037 );
5038 return;
5039 }
5040 }
5041
5042 // Checks if name is a legal method name.
5043 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5044 if (!_need_verify) { return; }
5045
5046 assert(name != nullptr, "method name is null");
5047 char* bytes = (char*)name->bytes();
5048 unsigned int length = name->utf8_length();
5049 bool legal = false;
5050
5051 if (length > 0) {
5052 if (bytes[0] == JVM_SIGNATURE_SPECIAL) {
5053 if (name == vmSymbols::object_initializer_name() ||
5054 name == vmSymbols::class_initializer_name()) {
5055 legal = true;
5056 }
5057 } else if (_major_version < JAVA_1_5_VERSION) {
5058 const char* p;
5059 p = skip_over_field_name(bytes, false, length);
5060 legal = (p != nullptr) && ((p - bytes) == (int)length);
5061 } else {
5062 // 4881221: relax the constraints based on JSR202 spec
5063 legal = verify_unqualified_name(bytes, length, LegalMethod);
5064 }
5065 }
5066
5067 if (!legal) {
5068 ResourceMark rm(THREAD);
5069 assert(_class_name != nullptr, "invariant");
5070 // Names are all known to be < 64k so we know this formatted message is not excessively large.
5071 Exceptions::fthrow(
5072 THREAD_AND_LOCATION,
5073 vmSymbols::java_lang_ClassFormatError(),
5074 "Illegal method name \"%.*s\" in class %s", length, bytes,
5075 _class_name->as_C_string()
5076 );
5077 return;
5078 }
5079 }
5080
5081 bool ClassFileParser::legal_field_signature(const Symbol* signature, TRAPS) const {
5082 const char* const bytes = (const char*)signature->bytes();
5083 const unsigned int length = signature->utf8_length();
5084 const char* const p = skip_over_field_signature(bytes, false, length, CHECK_false);
5085
5086 if (p == nullptr || (p - bytes) != (int)length) {
5087 return false;
5088 }
5089 return true;
5090 }
5091
5092 // Checks if signature is a legal field signature.
5093 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5094 const Symbol* signature,
5095 TRAPS) const {
5096 if (!_need_verify) { return; }
5097
5098 const char* const bytes = (const char*)signature->bytes();
5099 const unsigned int length = signature->utf8_length();
5100 const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5101
5102 if (p == nullptr || (p - bytes) != (int)length) {
5103 throwIllegalSignature("Field", name, signature, CHECK);
5104 }
5105 }
5106
5107 // Check that the signature is compatible with the method name. For example,
5108 // check that <init> has a void signature.
5109 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
5110 const Symbol* signature,
5111 TRAPS) const {
5112 if (!_need_verify) {
5113 return;
5114 }
5115
5116 // Class initializers cannot have args for class format version >= 51.
5117 if (name == vmSymbols::class_initializer_name() &&
5118 signature != vmSymbols::void_method_signature() &&
5119 _major_version >= JAVA_7_VERSION) {
5120 throwIllegalSignature("Method", name, signature, THREAD);
5121 return;
5122 }
5123
5124 int sig_length = signature->utf8_length();
5125 if (name->utf8_length() > 0 &&
5126 name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
5127 sig_length > 0 &&
5128 signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
5129 throwIllegalSignature("Method", name, signature, THREAD);
5130 }
5131 }
5132
5133 // Checks if signature is a legal method signature.
5134 // Returns number of parameters
5135 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5136 const Symbol* signature,
5137 TRAPS) const {
5138 if (!_need_verify) {
5139 // make sure caller's args_size will be less than 0 even for non-static
5140 // method so it will be recomputed in compute_size_of_parameters().
5141 return -2;
5142 }
5143
5144 unsigned int args_size = 0;
5145 const char* p = (const char*)signature->bytes();
5146 unsigned int length = signature->utf8_length();
5147 const char* nextp;
5148
5159 length -= pointer_delta_as_int(nextp, p);
5160 p = nextp;
5161 nextp = skip_over_field_signature(p, false, length, CHECK_0);
5162 }
5163 // The first non-signature thing better be a ')'
5164 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5165 length--;
5166 // Now we better just have a return value
5167 nextp = skip_over_field_signature(p, true, length, CHECK_0);
5168 if (nextp && ((int)length == (nextp - p))) {
5169 return args_size;
5170 }
5171 }
5172 }
5173 // Report error
5174 throwIllegalSignature("Method", name, signature, THREAD);
5175 return 0;
5176 }
5177
5178 int ClassFileParser::static_field_size() const {
5179 assert(_layout_info != nullptr, "invariant");
5180 return _layout_info->_static_field_size;
5181 }
5182
5183 int ClassFileParser::total_oop_map_count() const {
5184 assert(_layout_info != nullptr, "invariant");
5185 return _layout_info->oop_map_blocks->_nonstatic_oop_map_count;
5186 }
5187
5188 jint ClassFileParser::layout_size() const {
5189 assert(_layout_info != nullptr, "invariant");
5190 return _layout_info->_instance_size;
5191 }
5192
5193 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5194 const Array<Method*>* methods) {
5195 assert(ik != nullptr, "invariant");
5196 assert(methods != nullptr, "invariant");
5197
5198 // Set up Method*::intrinsic_id as soon as we know the names of methods.
5199 // (We used to do this lazily, but now we query it in Rewriter,
5200 // which is eagerly done for every method, so we might as well do it now,
5201 // when everything is fresh in memory.)
5202 const vmSymbolID klass_id = Method::klass_id_for_intrinsics(ik);
5203
5204 if (klass_id != vmSymbolID::NO_SID) {
5205 for (int j = 0; j < methods->length(); ++j) {
5206 Method* method = methods->at(j);
5207 method->init_intrinsic_id(klass_id);
5208
5209 if (CheckIntrinsics) {
5210 // Check if an intrinsic is defined for method 'method',
5285 }
5286 }
5287
5288 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5289 const ClassInstanceInfo& cl_inst_info,
5290 TRAPS) {
5291 if (_klass != nullptr) {
5292 return _klass;
5293 }
5294
5295 InstanceKlass* const ik =
5296 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5297
5298 if (is_hidden()) {
5299 mangle_hidden_class_name(ik);
5300 }
5301
5302 fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5303
5304 assert(_klass == ik, "invariant");
5305 return ik;
5306 }
5307
5308 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5309 bool changed_by_loadhook,
5310 const ClassInstanceInfo& cl_inst_info,
5311 TRAPS) {
5312 assert(ik != nullptr, "invariant");
5313
5314 // Set name and CLD before adding to CLD
5315 ik->set_class_loader_data(_loader_data);
5316 ik->set_class_loader_type();
5317 ik->set_name(_class_name);
5318
5319 // Add all classes to our internal class loader list here,
5320 // including classes in the bootstrap (null) class loader.
5321 const bool publicize = !is_internal();
5322
5323 _loader_data->add_class(ik, publicize);
5324
5325 set_klass_to_deallocate(ik);
5326
5327 assert(_layout_info != nullptr, "invariant");
5328 assert(ik->static_field_size() == _layout_info->_static_field_size, "sanity");
5329 assert(ik->nonstatic_oop_map_count() == _layout_info->oop_map_blocks->_nonstatic_oop_map_count,
5330 "sanity");
5331
5332 assert(ik->is_instance_klass(), "sanity");
5333 assert(ik->size_helper() == _layout_info->_instance_size, "sanity");
5334
5335 // Fill in information already parsed
5336 ik->set_should_verify_class(_need_verify);
5337
5338 // Not yet: supers are done below to support the new subtype-checking fields
5339 ik->set_nonstatic_field_size(_layout_info->_nonstatic_field_size);
5340 ik->set_has_nonstatic_fields(_layout_info->_has_nonstatic_fields);
5341 ik->set_has_strict_static_fields(_has_strict_static_fields);
5342
5343 if (_layout_info->_is_naturally_atomic) {
5344 ik->set_is_naturally_atomic();
5345 }
5346
5347 if (_layout_info->_must_be_atomic) {
5348 ik->set_must_be_atomic();
5349 }
5350
5351 ik->set_static_oop_field_count(_static_oop_count);
5352
5353 // this transfers ownership of a lot of arrays from
5354 // the parser onto the InstanceKlass*
5355 apply_parsed_class_metadata(ik, _java_fields_count);
5356
5357 // can only set dynamic nest-host after static nest information is set
5358 if (cl_inst_info.dynamic_nest_host() != nullptr) {
5359 ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5360 }
5361
5362 // note that is not safe to use the fields in the parser from this point on
5363 assert(nullptr == _cp, "invariant");
5364 assert(nullptr == _fieldinfo_stream, "invariant");
5365 assert(nullptr == _fieldinfo_search_table, "invariant");
5366 assert(nullptr == _fields_status, "invariant");
5367 assert(nullptr == _methods, "invariant");
5368 assert(nullptr == _inner_classes, "invariant");
5369 assert(nullptr == _nest_members, "invariant");
5370 assert(nullptr == _loadable_descriptors, "invariant");
5371 assert(nullptr == _combined_annotations, "invariant");
5372 assert(nullptr == _record_components, "invariant");
5373 assert(nullptr == _permitted_subclasses, "invariant");
5374 assert(nullptr == _inline_layout_info_array, "invariant");
5375
5376 if (_has_localvariable_table) {
5377 ik->set_has_localvariable_table(true);
5378 }
5379
5380 if (_has_final_method) {
5381 ik->set_has_final_method();
5382 }
5383
5384 ik->copy_method_ordering(_method_ordering, CHECK);
5385 // The InstanceKlass::_methods_jmethod_ids cache
5386 // is managed on the assumption that the initial cache
5387 // size is equal to the number of methods in the class. If
5388 // that changes, then InstanceKlass::idnum_can_increment()
5389 // has to be changed accordingly.
5390 ik->set_initial_method_idnum(checked_cast<u2>(ik->methods()->length()));
5391
5392 ik->set_this_class_index(_this_class_index);
5393
5394 if (_is_hidden) {
5431 if ((_num_miranda_methods > 0) ||
5432 // if this class introduced new miranda methods or
5433 (_super_klass != nullptr && _super_klass->has_miranda_methods())
5434 // super class exists and this class inherited miranda methods
5435 ) {
5436 ik->set_has_miranda_methods(); // then set a flag
5437 }
5438
5439 // Fill in information needed to compute superclasses.
5440 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5441 ik->set_transitive_interfaces(_transitive_interfaces);
5442 ik->set_local_interfaces(_local_interfaces);
5443 _transitive_interfaces = nullptr;
5444 _local_interfaces = nullptr;
5445
5446 // Initialize itable offset tables
5447 klassItable::setup_itable_offset_table(ik);
5448
5449 // Compute transitive closure of interfaces this class implements
5450 // Do final class setup
5451 OopMapBlocksBuilder* oop_map_blocks = _layout_info->oop_map_blocks;
5452 if (oop_map_blocks->_nonstatic_oop_map_count > 0) {
5453 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5454 }
5455
5456 if (_has_contended_fields || _parsed_annotations->is_contended() ||
5457 ( _super_klass != nullptr && _super_klass->has_contended_annotations())) {
5458 ik->set_has_contended_annotations(true);
5459 }
5460
5461 // Fill in has_finalizer and layout_helper
5462 set_precomputed_flags(ik);
5463
5464 // check if this class can access its super class
5465 check_super_class_access(ik, CHECK);
5466
5467 // check if this class can access its superinterfaces
5468 check_super_interface_access(ik, CHECK);
5469
5470 // check if this class overrides any final method
5471 check_final_method_override(ik, CHECK);
5492
5493 assert(_all_mirandas != nullptr, "invariant");
5494
5495 // Generate any default methods - default methods are public interface methods
5496 // that have a default implementation. This is new with Java 8.
5497 if (_has_nonstatic_concrete_methods) {
5498 DefaultMethods::generate_default_methods(ik,
5499 _all_mirandas,
5500 CHECK);
5501 }
5502
5503 // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5504 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5505 !module_entry->has_default_read_edges()) {
5506 if (!module_entry->set_has_default_read_edges()) {
5507 // We won a potential race
5508 JvmtiExport::add_default_read_edges(module_handle, THREAD);
5509 }
5510 }
5511
5512 if (is_inline_type()) {
5513 InlineKlass* vk = InlineKlass::cast(ik);
5514 vk->set_payload_alignment(_layout_info->_payload_alignment);
5515 vk->set_payload_offset(_layout_info->_payload_offset);
5516 vk->set_payload_size_in_bytes(_layout_info->_payload_size_in_bytes);
5517 vk->set_non_atomic_size_in_bytes(_layout_info->_non_atomic_size_in_bytes);
5518 vk->set_non_atomic_alignment(_layout_info->_non_atomic_alignment);
5519 vk->set_atomic_size_in_bytes(_layout_info->_atomic_layout_size_in_bytes);
5520 vk->set_nullable_size_in_bytes(_layout_info->_nullable_layout_size_in_bytes);
5521 vk->set_null_marker_offset(_layout_info->_null_marker_offset);
5522 vk->set_null_reset_value_offset(_layout_info->_null_reset_value_offset);
5523 if (_layout_info->_is_empty_inline_klass) vk->set_is_empty_inline_type();
5524 vk->initialize_calling_convention(CHECK);
5525 }
5526
5527 if (Arguments::is_valhalla_enabled() && !access_flags().is_identity_class() && !access_flags().is_interface()
5528 && _class_name != vmSymbols::java_lang_Object() && UseAltSubstitutabilityMethod) {
5529 // Both abstract and concrete value classes need a field map for acmp
5530 ik->set_acmp_maps_offset(_layout_info->_acmp_maps_offset);
5531 // Current format of acmp maps:
5532 // All maps are stored contiguously in a single int array because it might
5533 // be too early to instantiate an Object array (to be investigated)
5534 // Format is:
5535 // [number_of_nonoop_entries][offset0][size[0][offset1][size1]...[oop_offset0][oop_offset1]...
5536 // ^ ^
5537 // | |
5538 // --------------------- Pair of integer describing a segment of
5539 // contiguous non-oop fields
5540 // First element is the number of segment of contiguous non-oop fields
5541 // Then, each segment of contiguous non-oop fields is described by two consecutive elements:
5542 // the offset then the size.
5543 // After the last segment of contiguous non-oop fields, oop fields are described, one element
5544 // per oop field, containing the offset of the field.
5545 int nonoop_acmp_map_size = _layout_info->_nonoop_acmp_map->length() * 2;
5546 int oop_acmp_map_size = _layout_info->_oop_acmp_map->length();
5547 typeArrayOop map = oopFactory::new_intArray(nonoop_acmp_map_size + oop_acmp_map_size + 1, CHECK);
5548 typeArrayHandle map_h(THREAD, map);
5549 map_h->int_at_put(0, _layout_info->_nonoop_acmp_map->length());
5550 for (int i = 0; i < _layout_info->_nonoop_acmp_map->length(); i++) {
5551 map_h->int_at_put(i * 2 + 1, _layout_info->_nonoop_acmp_map->at(i).first);
5552 map_h->int_at_put(i * 2 + 2, _layout_info->_nonoop_acmp_map->at(i).second);
5553 }
5554 int oop_map_start = nonoop_acmp_map_size + 1;
5555 for (int i = 0; i < _layout_info->_oop_acmp_map->length(); i++) {
5556 map_h->int_at_put(oop_map_start + i, _layout_info->_oop_acmp_map->at(i));
5557 }
5558 ik->java_mirror()->obj_field_put(ik->acmp_maps_offset(), map_h());
5559 }
5560
5561 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5562
5563 if (!is_internal()) {
5564 ik->print_class_load_logging(_loader_data, module_entry, _stream);
5565
5566 if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5567 ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5568 log_is_enabled(Info, class, preview)) {
5569 ResourceMark rm;
5570 log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5571 ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5572 }
5573
5574 if (log_is_enabled(Debug, class, resolve)) {
5575 ResourceMark rm;
5576 // print out the superclass.
5577 const char * from = ik->external_name();
5578 if (ik->super() != nullptr) {
5579 log_debug(class, resolve)("%s %s (super)",
5580 from,
5621 const ClassLoadInfo* cl_info,
5622 Publicity pub_level,
5623 TRAPS) :
5624 _stream(stream),
5625 _class_name(nullptr),
5626 _loader_data(loader_data),
5627 _is_hidden(cl_info->is_hidden()),
5628 _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5629 _orig_cp_size(0),
5630 _static_oop_count(0),
5631 _super_klass(),
5632 _cp(nullptr),
5633 _fieldinfo_stream(nullptr),
5634 _fieldinfo_search_table(nullptr),
5635 _fields_status(nullptr),
5636 _methods(nullptr),
5637 _inner_classes(nullptr),
5638 _nest_members(nullptr),
5639 _nest_host(0),
5640 _permitted_subclasses(nullptr),
5641 _loadable_descriptors(nullptr),
5642 _record_components(nullptr),
5643 _local_interfaces(nullptr),
5644 _local_interface_indexes(nullptr),
5645 _transitive_interfaces(nullptr),
5646 _combined_annotations(nullptr),
5647 _class_annotations(nullptr),
5648 _class_type_annotations(nullptr),
5649 _fields_annotations(nullptr),
5650 _fields_type_annotations(nullptr),
5651 _klass(nullptr),
5652 _klass_to_deallocate(nullptr),
5653 _parsed_annotations(nullptr),
5654 _layout_info(nullptr),
5655 _inline_layout_info_array(nullptr),
5656 _temp_field_info(nullptr),
5657 _method_ordering(nullptr),
5658 _all_mirandas(nullptr),
5659 _vtable_size(0),
5660 _itable_size(0),
5661 _num_miranda_methods(0),
5662 _protection_domain(cl_info->protection_domain()),
5663 _access_flags(),
5664 _pub_level(pub_level),
5665 _bad_constant_seen(0),
5666 _synthetic_flag(false),
5667 _sde_length(false),
5668 _sde_buffer(nullptr),
5669 _sourcefile_index(0),
5670 _generic_signature_index(0),
5671 _major_version(0),
5672 _minor_version(0),
5673 _this_class_index(0),
5674 _super_class_index(0),
5675 _itfs_len(0),
5676 _java_fields_count(0),
5677 _need_verify(false),
5678 _has_nonstatic_concrete_methods(false),
5679 _declares_nonstatic_concrete_methods(false),
5680 _has_localvariable_table(false),
5681 _has_final_method(false),
5682 _has_contended_fields(false),
5683 _has_aot_runtime_setup_method(false),
5684 _has_strict_static_fields(false),
5685 _has_inline_type_fields(false),
5686 _is_naturally_atomic(false),
5687 _must_be_atomic(true),
5688 _has_loosely_consistent_annotation(false),
5689 _has_finalizer(false),
5690 _has_empty_finalizer(false),
5691 _max_bootstrap_specifier_index(-1) {
5692
5693 _class_name = name != nullptr ? name : vmSymbols::unknown_class_name();
5694 _class_name->increment_refcount();
5695
5696 assert(_loader_data != nullptr, "invariant");
5697 assert(stream != nullptr, "invariant");
5698 assert(_stream != nullptr, "invariant");
5699 assert(_stream->buffer() == _stream->current(), "invariant");
5700 assert(_class_name != nullptr, "invariant");
5701 assert(0 == _access_flags.as_unsigned_short(), "invariant");
5702
5703 // Figure out whether we can skip format checking (matching classic VM behavior)
5704 // Always verify CFLH bytes from the user agents.
5705 _need_verify = stream->from_class_file_load_hook() ? true : Verifier::should_verify_for(_loader_data->class_loader());
5706
5707 // synch back verification state to stream to check for truncation.
5708 stream->set_need_verify(_need_verify);
5709
5710 parse_stream(stream, CHECK);
5711
5712 post_process_parsed_stream(stream, _cp, CHECK);
5713 }
5714
5715 void ClassFileParser::clear_class_metadata() {
5716 // metadata created before the instance klass is created. Must be
5717 // deallocated if classfile parsing returns an error.
5718 _cp = nullptr;
5719 _fieldinfo_stream = nullptr;
5720 _fieldinfo_search_table = nullptr;
5721 _fields_status = nullptr;
5722 _methods = nullptr;
5723 _inner_classes = nullptr;
5724 _nest_members = nullptr;
5725 _permitted_subclasses = nullptr;
5726 _loadable_descriptors = nullptr;
5727 _combined_annotations = nullptr;
5728 _class_annotations = _class_type_annotations = nullptr;
5729 _fields_annotations = _fields_type_annotations = nullptr;
5730 _record_components = nullptr;
5731 _inline_layout_info_array = nullptr;
5732 }
5733
5734 // Destructor to clean up
5735 ClassFileParser::~ClassFileParser() {
5736 _class_name->decrement_refcount();
5737
5738 if (_cp != nullptr) {
5739 MetadataFactory::free_metadata(_loader_data, _cp);
5740 }
5741
5742 if (_fieldinfo_stream != nullptr) {
5743 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_stream);
5744 }
5745 MetadataFactory::free_array<u1>(_loader_data, _fieldinfo_search_table);
5746
5747 if (_fields_status != nullptr) {
5748 MetadataFactory::free_array<FieldStatus>(_loader_data, _fields_status);
5749 }
5750
5751 if (_inline_layout_info_array != nullptr) {
5752 MetadataFactory::free_array<InlineLayoutInfo>(_loader_data, _inline_layout_info_array);
5753 }
5754
5755 if (_methods != nullptr) {
5756 // Free methods
5757 InstanceKlass::deallocate_methods(_loader_data, _methods);
5758 }
5759
5760 // beware of the Universe::empty_blah_array!!
5761 if (_inner_classes != nullptr && _inner_classes != Universe::the_empty_short_array()) {
5762 MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5763 }
5764
5765 if (_nest_members != nullptr && _nest_members != Universe::the_empty_short_array()) {
5766 MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5767 }
5768
5769 if (_record_components != nullptr) {
5770 InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5771 }
5772
5773 if (_permitted_subclasses != nullptr && _permitted_subclasses != Universe::the_empty_short_array()) {
5774 MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5775 }
5776
5777 if (_loadable_descriptors != nullptr && _loadable_descriptors != Universe::the_empty_short_array()) {
5778 MetadataFactory::free_array<u2>(_loader_data, _loadable_descriptors);
5779 }
5780
5781 // Free interfaces
5782 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5783 _local_interfaces, _transitive_interfaces);
5784
5785 if (_combined_annotations != nullptr) {
5786 // After all annotations arrays have been created, they are installed into the
5787 // Annotations object that will be assigned to the InstanceKlass being created.
5788
5789 // Deallocate the Annotations object and the installed annotations arrays.
5790 _combined_annotations->deallocate_contents(_loader_data);
5791
5792 // If the _combined_annotations pointer is non-null,
5793 // then the other annotations fields should have been cleared.
5794 assert(_class_annotations == nullptr, "Should have been cleared");
5795 assert(_class_type_annotations == nullptr, "Should have been cleared");
5796 assert(_fields_annotations == nullptr, "Should have been cleared");
5797 assert(_fields_type_annotations == nullptr, "Should have been cleared");
5798 } else {
5799 // If the annotations arrays were not installed into the Annotations object,
5800 // then they have to be deallocated explicitly.
5860
5861 assert(cp_size == (u2)cp->length(), "invariant");
5862
5863 // ACCESS FLAGS
5864 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
5865
5866 // Access flags
5867 u2 flags;
5868 // JVM_ACC_MODULE is defined in JDK-9 and later.
5869 if (_major_version >= JAVA_9_VERSION) {
5870 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5871 } else {
5872 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5873 }
5874
5875 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5876 // Set abstract bit for old class files for backward compatibility
5877 flags |= JVM_ACC_ABSTRACT;
5878 }
5879
5880 // Fixing ACC_SUPER/ACC_IDENTITY for old class files
5881 if (!supports_inline_types()) {
5882 const bool is_module = (flags & JVM_ACC_MODULE) != 0;
5883 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
5884 if (!is_module && !is_interface) {
5885 flags |= JVM_ACC_IDENTITY;
5886 }
5887 }
5888
5889 verify_legal_class_modifiers(flags, nullptr, false, CHECK);
5890
5891 short bad_constant = class_bad_constant_seen();
5892 if (bad_constant != 0) {
5893 // Do not throw CFE until after the access_flags are checked because if
5894 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5895 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5896 return;
5897 }
5898
5899 _access_flags.set_flags(flags);
5900
5901 // This class and superclass
5902 _this_class_index = stream->get_u2_fast();
5903 guarantee_property(
5904 valid_cp_range(_this_class_index, cp_size) &&
5905 cp->tag_at(_this_class_index).is_unresolved_klass(),
5906 "Invalid this class index %u in constant pool in class file %s",
5907 _this_class_index, CHECK);
5908
5972 }
5973 ls.cr();
5974 }
5975 }
5976
5977 // SUPERKLASS
5978 _super_class_index = stream->get_u2_fast();
5979 check_super_class(cp,
5980 _super_class_index,
5981 _need_verify,
5982 CHECK);
5983
5984 // Interfaces
5985 _itfs_len = stream->get_u2_fast();
5986 parse_interfaces(stream,
5987 _itfs_len,
5988 cp,
5989 &_has_nonstatic_concrete_methods,
5990 CHECK);
5991
5992 // Fields (offsets are filled in later)
5993 parse_fields(stream,
5994 _access_flags,
5995 cp,
5996 cp_size,
5997 &_java_fields_count,
5998 CHECK);
5999
6000 assert(_temp_field_info != nullptr, "invariant");
6001
6002 // Methods
6003 parse_methods(stream,
6004 is_interface(),
6005 !is_identity_class(),
6006 is_abstract_class(),
6007 &_has_localvariable_table,
6008 &_has_final_method,
6009 &_declares_nonstatic_concrete_methods,
6010 CHECK);
6011
6012 assert(_methods != nullptr, "invariant");
6013
6014 if (_declares_nonstatic_concrete_methods) {
6015 _has_nonstatic_concrete_methods = true;
6016 }
6017
6018 // Additional attributes/annotations
6019 _parsed_annotations = new ClassAnnotationCollector();
6020 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6021
6022 assert(_inner_classes != nullptr, "invariant");
6023
6024 // Finalize the Annotations metadata object,
6025 // now that all annotation arrays have been created.
6026 create_combined_annotations(CHECK);
6074 }
6075
6076 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6077 ConstantPool* cp,
6078 TRAPS) {
6079 assert(stream != nullptr, "invariant");
6080 assert(stream->at_eos(), "invariant");
6081 assert(cp != nullptr, "invariant");
6082 assert(_loader_data != nullptr, "invariant");
6083
6084 if (_class_name == vmSymbols::java_lang_Object()) {
6085 precond(_super_class_index == 0);
6086 precond(_super_klass == nullptr);
6087 guarantee_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6088 "java.lang.Object cannot implement an interface in class file %s",
6089 CHECK);
6090 } else {
6091 // Set _super_klass after class file is parsed and format is checked
6092 assert(_super_class_index > 0, "any class other than Object must have a super class");
6093 Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6094 if (is_interface()) {
6095 // Before attempting to resolve the superclass, check for class format
6096 // errors not checked yet.
6097 guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6098 "Interfaces must have java.lang.Object as superclass in class file %s",
6099 CHECK);
6100 }
6101 Handle loader(THREAD, _loader_data->class_loader());
6102 if (loader.is_null() && super_class_name == vmSymbols::java_lang_Object()) {
6103 // fast path to avoid lookup
6104 _super_klass = vmClasses::Object_klass();
6105 } else {
6106 _super_klass = (const InstanceKlass*)
6107 SystemDictionary::resolve_super_or_fail(_class_name,
6108 super_class_name,
6109 loader,
6110 true,
6111 CHECK);
6112 }
6113 }
6114
6115 if (_super_klass != nullptr) {
6116 if (_super_klass->is_interface()) {
6117 classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
6118 return;
6119 }
6120
6121 if (_super_klass->is_final()) {
6122 classfile_icce_error("class %s cannot inherit from final class %s", _super_klass, THREAD);
6123 return;
6124 }
6125
6126 if (Arguments::is_valhalla_enabled()) {
6127 check_identity_and_value_modifiers(this, _super_klass, CHECK);
6128 }
6129
6130 if (_super_klass->has_nonstatic_concrete_methods()) {
6131 _has_nonstatic_concrete_methods = true;
6132 }
6133 }
6134
6135 if (_parsed_annotations->has_annotation(AnnotationCollector::_jdk_internal_LooselyConsistentValue) && _access_flags.is_identity_class()) {
6136 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
6137 err_msg("class %s cannot have annotation jdk.internal.vm.annotation.LooselyConsistentValue, because it is not a value class",
6138 _class_name->as_klass_external_name()));
6139 }
6140
6141 // Determining if the class allows tearing or not (default is not)
6142 if (Arguments::is_valhalla_enabled() && !_access_flags.is_identity_class()) {
6143 if (_parsed_annotations->has_annotation(ClassAnnotationCollector::_jdk_internal_LooselyConsistentValue)
6144 && (_super_klass == vmClasses::Object_klass() || !_super_klass->must_be_atomic())) {
6145 // Conditions above are not sufficient to determine atomicity requirements,
6146 // the presence of fields with atomic requirements could force the current class to have atomicy requirements too
6147 // Marking as not needing atomicity for now, can be updated when computing the fields layout
6148 // The InstanceKlass must be filled with the value from the FieldLayoutInfo returned by
6149 // the FieldLayoutBuilder, not with this _must_be_atomic field.
6150 _must_be_atomic = false;
6151 }
6152 // Apply VM options override
6153 if (*ForceNonTearable != '\0') {
6154 // Allow a command line switch to force the same atomicity property:
6155 const char* class_name_str = _class_name->as_C_string();
6156 if (StringUtils::class_list_match(ForceNonTearable, class_name_str)) {
6157 _must_be_atomic = true;
6158 }
6159 }
6160 }
6161
6162 int itfs_len = _local_interface_indexes == nullptr ? 0 : _local_interface_indexes->length();
6163 _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, nullptr, CHECK);
6164 if (_local_interface_indexes != nullptr) {
6165 for (int i = 0; i < _local_interface_indexes->length(); i++) {
6166 u2 interface_index = _local_interface_indexes->at(i);
6167 Klass* interf;
6168 if (cp->tag_at(interface_index).is_klass()) {
6169 interf = cp->resolved_klass_at(interface_index);
6170 } else {
6171 Symbol* const unresolved_klass = cp->klass_name_at(interface_index);
6172
6173 // Don't need to check legal name because it's checked when parsing constant pool.
6174 // But need to make sure it's not an array type.
6175 guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
6176 "Bad interface name in class file %s", CHECK);
6177
6178 // Call resolve on the interface class name with class circularity checking
6179 interf = SystemDictionary::resolve_super_or_fail(
6180 _class_name,
6181 unresolved_klass,
6182 Handle(THREAD, _loader_data->class_loader()),
6183 false,
6184 CHECK);
6185 }
6186
6187 if (!interf->is_interface()) {
6188 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
6189 err_msg("class %s can not implement %s, because it is not an interface (%s)",
6190 _class_name->as_klass_external_name(),
6191 interf->external_name(),
6192 interf->class_in_module_of_loader()));
6193 }
6194
6195 if (Arguments::is_valhalla_enabled()) {
6196 // Check modifiers and set carries_identity_modifier/carries_value_modifier flags
6197 check_identity_and_value_modifiers(this, InstanceKlass::cast(interf), CHECK);
6198 }
6199
6200 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
6201 _has_nonstatic_concrete_methods = true;
6202 }
6203 _local_interfaces->at_put(i, InstanceKlass::cast(interf));
6204 }
6205 }
6206 assert(_local_interfaces != nullptr, "invariant");
6207
6208 // Compute the transitive list of all unique interfaces implemented by this class
6209 _transitive_interfaces =
6210 compute_transitive_interfaces(_super_klass,
6211 _local_interfaces,
6212 _loader_data,
6213 CHECK);
6214
6215 assert(_transitive_interfaces != nullptr, "invariant");
6216
6217 // sort methods
6218 _method_ordering = sort_methods(_methods);
6219
6220 _all_mirandas = new GrowableArray<Method*>(20);
6221
6222 Handle loader(THREAD, _loader_data->class_loader());
6223 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6224 &_num_miranda_methods,
6225 _all_mirandas,
6226 _super_klass,
6227 _methods,
6228 _access_flags,
6229 _major_version,
6230 loader,
6231 _class_name,
6232 _local_interfaces);
6233
6234 // Size of Java itable (in words)
6235 _itable_size = is_interface() ? 0 :
6236 klassItable::compute_itable_size(_transitive_interfaces);
6237
6238 assert(_parsed_annotations != nullptr, "invariant");
6239
6240 if (Arguments::is_valhalla_enabled()) {
6241 _inline_layout_info_array = MetadataFactory::new_array<InlineLayoutInfo>(_loader_data,
6242 java_fields_count(),
6243 CHECK);
6244 for (GrowableArrayIterator<FieldInfo> it = _temp_field_info->begin(); it != _temp_field_info->end(); ++it) {
6245 FieldInfo fieldinfo = *it;
6246 if (fieldinfo.access_flags().is_static()) continue; // Only non-static fields are processed at load time
6247 Symbol* sig = fieldinfo.signature(cp);
6248 if (fieldinfo.field_flags().is_null_free_inline_type()) {
6249 // Pre-load classes of null-free fields that are candidate for flattening
6250 TempNewSymbol s = Signature::strip_envelope(sig);
6251 if (s == _class_name) {
6252 THROW_MSG(vmSymbols::java_lang_ClassCircularityError(),
6253 err_msg("Class %s cannot have a null-free non-static field of its own type", _class_name->as_C_string()));
6254 }
6255 log_info(class, preload)("Preloading of class %s during loading of class %s. "
6256 "Cause: a null-free non-static field is declared with this type",
6257 s->as_C_string(), _class_name->as_C_string());
6258 InstanceKlass* klass = SystemDictionary::resolve_with_circularity_detection(_class_name, s,
6259 Handle(THREAD,
6260 _loader_data->class_loader()),
6261 false, THREAD);
6262 if (HAS_PENDING_EXCEPTION) {
6263 log_info(class, preload)("Preloading of class %s during loading of class %s "
6264 "(cause: null-free non-static field) failed: %s",
6265 s->as_C_string(), _class_name->as_C_string(),
6266 PENDING_EXCEPTION->klass()->name()->as_C_string());
6267 return; // Exception is still pending
6268 }
6269 assert(klass != nullptr, "Sanity check");
6270 InstanceKlass::check_can_be_annotated_with_NullRestricted(klass, _class_name, CHECK);
6271 InlineKlass* vk = InlineKlass::cast(klass);
6272 _inline_layout_info_array->adr_at(fieldinfo.index())->set_klass(vk);
6273 log_info(class, preload)("Preloading of class %s during loading of class %s "
6274 "(cause: null-free non-static field) succeeded",
6275 s->as_C_string(), _class_name->as_C_string());
6276 } else if (Signature::has_envelope(sig) && PreloadClasses) {
6277 // Preloading classes for nullable fields that are listed in the LoadableDescriptors attribute
6278 // Those classes would be required later for the flattening of nullable inline type fields
6279 TempNewSymbol name = Signature::strip_envelope(sig);
6280 if (name != _class_name && is_class_in_loadable_descriptors_attribute(sig)) {
6281 log_info(class, preload)("Preloading of class %s during loading of class %s. "
6282 "Cause: field type in LoadableDescriptors attribute",
6283 name->as_C_string(), _class_name->as_C_string());
6284 oop loader = loader_data()->class_loader();
6285 Klass* klass = SystemDictionary::resolve_super_or_fail(_class_name, name,
6286 Handle(THREAD, loader),
6287 false, THREAD);
6288 if (klass != nullptr) {
6289 if (klass->is_inline_klass()) {
6290 _inline_layout_info_array->adr_at(fieldinfo.index())->set_klass(InlineKlass::cast(klass));
6291 log_info(class, preload)("Preloading of class %s during loading of class %s "
6292 "(cause: field type in LoadableDescriptors attribute) succeeded",
6293 name->as_C_string(), _class_name->as_C_string());
6294 } else {
6295 // Non value class are allowed by the current spec, but it could be an indication of an issue so let's log a warning
6296 log_info(class, preload)("Preloading of class %s during loading of class %s "
6297 "(cause: field type in LoadableDescriptors attribute) but loaded class is not a value class",
6298 name->as_C_string(), _class_name->as_C_string());
6299 }
6300 } else {
6301 log_info(class, preload)("Preloading of class %s during loading of class %s "
6302 "(cause: field type in LoadableDescriptors attribute) failed : %s",
6303 name->as_C_string(), _class_name->as_C_string(),
6304 PENDING_EXCEPTION->klass()->name()->as_C_string());
6305 }
6306 // Loads triggered by the LoadableDescriptors attribute are speculative, failures must not impact loading of current class
6307 if (HAS_PENDING_EXCEPTION) {
6308 CLEAR_PENDING_EXCEPTION;
6309 }
6310 } else {
6311 // Just poking the system dictionary to see if the class has already be loaded. Looking for migrated classes
6312 // used when --enable-preview when jdk isn't compiled with --enable-preview so doesn't include LoadableDescriptors.
6313 // This is temporary.
6314 oop loader = loader_data()->class_loader();
6315 InstanceKlass* klass = SystemDictionary::find_instance_klass(THREAD, name, Handle(THREAD, loader));
6316 if (klass != nullptr && klass->is_inline_klass()) {
6317 _inline_layout_info_array->adr_at(fieldinfo.index())->set_klass(InlineKlass::cast(klass));
6318 log_info(class, preload)("Preloading of class %s during loading of class %s "
6319 "(cause: field type not in LoadableDescriptors attribute) succeeded",
6320 name->as_C_string(), _class_name->as_C_string());
6321 }
6322 }
6323 }
6324 }
6325 }
6326
6327 _layout_info = new FieldLayoutInfo();
6328 FieldLayoutBuilder lb(class_name(), loader_data(), super_klass(), _cp, /*_fields*/ _temp_field_info,
6329 _parsed_annotations->is_contended(), is_inline_type(),
6330 access_flags().is_abstract() && !access_flags().is_identity_class() && !access_flags().is_interface(),
6331 _must_be_atomic, _layout_info, _inline_layout_info_array);
6332 lb.build_layout();
6333 _has_inline_type_fields = _layout_info->_has_inline_fields;
6334
6335 int injected_fields_count = _temp_field_info->length() - _java_fields_count;
6336 _fieldinfo_stream =
6337 FieldInfoStream::create_FieldInfoStream(_temp_field_info, _java_fields_count,
6338 injected_fields_count, loader_data(), CHECK);
6339 _fieldinfo_search_table = FieldInfoStream::create_search_table(_cp, _fieldinfo_stream, _loader_data, CHECK);
6340 _fields_status =
6341 MetadataFactory::new_array<FieldStatus>(_loader_data, _temp_field_info->length(),
6342 FieldStatus(0), CHECK);
6343
6344 // Strict static fields track initialization status from the beginning of time.
6345 // After this class runs <clinit>, they will be verified as being "not unset".
6346 // See Step 8 of InstanceKlass::initialize_impl.
6347 if (_has_strict_static_fields) {
6348 bool found_one = false;
6349 for (int i = 0; i < _temp_field_info->length(); i++) {
6350 FieldInfo& fi = *_temp_field_info->adr_at(i);
6351 if (fi.access_flags().is_strict() && fi.access_flags().is_static()) {
6352 found_one = true;
6353 if (fi.initializer_index() != 0) {
6354 // skip strict static fields with ConstantValue attributes
6355 } else {
6356 _fields_status->adr_at(fi.index())->update_strict_static_unset(true);
6357 _fields_status->adr_at(fi.index())->update_strict_static_unread(true);
6358 }
6359 }
6360 }
6361 assert(found_one == _has_strict_static_fields,
6362 "correct prediction = %d", (int)_has_strict_static_fields);
6363 }
6364 }
6365
6366 void ClassFileParser::set_klass(InstanceKlass* klass) {
6367
6368 #ifdef ASSERT
6369 if (klass != nullptr) {
6370 assert(nullptr == _klass, "leaking?");
6371 }
6372 #endif
6373
6374 _klass = klass;
6375 }
6376
6377 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6378
6379 #ifdef ASSERT
6380 if (klass != nullptr) {
6381 assert(nullptr == _klass_to_deallocate, "leaking?");
6382 }
6383 #endif
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