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src/hotspot/share/classfile/classFileParser.cpp

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   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 "precompiled.hpp"
  25 #include "jvm.h"
  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 "logging/log.hpp"
  43 #include "logging/logStream.hpp"
  44 #include "memory/allocation.hpp"
  45 #include "memory/metadataFactory.hpp"
  46 #include "memory/oopFactory.hpp"
  47 #include "memory/resourceArea.hpp"
  48 #include "memory/universe.hpp"
  49 #include "oops/annotations.hpp"
  50 #include "oops/constantPool.inline.hpp"
  51 #include "oops/fieldStreams.inline.hpp"

  52 #include "oops/instanceKlass.inline.hpp"
  53 #include "oops/instanceMirrorKlass.hpp"
  54 #include "oops/klass.inline.hpp"
  55 #include "oops/klassVtable.hpp"
  56 #include "oops/metadata.hpp"
  57 #include "oops/method.inline.hpp"
  58 #include "oops/oop.inline.hpp"
  59 #include "oops/recordComponent.hpp"
  60 #include "oops/symbol.hpp"
  61 #include "prims/jvmtiExport.hpp"
  62 #include "prims/jvmtiThreadState.hpp"
  63 #include "runtime/arguments.hpp"
  64 #include "runtime/fieldDescriptor.inline.hpp"
  65 #include "runtime/handles.inline.hpp"
  66 #include "runtime/javaCalls.hpp"
  67 #include "runtime/os.hpp"
  68 #include "runtime/perfData.hpp"
  69 #include "runtime/reflection.hpp"
  70 #include "runtime/safepointVerifiers.hpp"
  71 #include "runtime/signature.hpp"
  72 #include "runtime/timer.hpp"
  73 #include "services/classLoadingService.hpp"
  74 #include "services/threadService.hpp"
  75 #include "utilities/align.hpp"
  76 #include "utilities/bitMap.inline.hpp"
  77 #include "utilities/copy.hpp"
  78 #include "utilities/formatBuffer.hpp"
  79 #include "utilities/exceptions.hpp"
  80 #include "utilities/globalDefinitions.hpp"
  81 #include "utilities/growableArray.hpp"
  82 #include "utilities/macros.hpp"
  83 #include "utilities/ostream.hpp"
  84 #include "utilities/resourceHash.hpp"

  85 #include "utilities/utf8.hpp"
  86 
  87 #if INCLUDE_CDS
  88 #include "classfile/systemDictionaryShared.hpp"
  89 #endif
  90 #if INCLUDE_JFR
  91 #include "jfr/support/jfrTraceIdExtension.hpp"
  92 #endif
  93 
  94 // We generally try to create the oops directly when parsing, rather than
  95 // allocating temporary data structures and copying the bytes twice. A
  96 // temporary area is only needed when parsing utf8 entries in the constant
  97 // pool and when parsing line number tables.
  98 
  99 // We add assert in debug mode when class format is not checked.
 100 
 101 #define JAVA_CLASSFILE_MAGIC              0xCAFEBABE
 102 #define JAVA_MIN_SUPPORTED_VERSION        45
 103 #define JAVA_PREVIEW_MINOR_VERSION        65535
 104 

 124 #define JAVA_10_VERSION                   54
 125 
 126 #define JAVA_11_VERSION                   55
 127 
 128 #define JAVA_12_VERSION                   56
 129 
 130 #define JAVA_13_VERSION                   57
 131 
 132 #define JAVA_14_VERSION                   58
 133 
 134 #define JAVA_15_VERSION                   59
 135 
 136 #define JAVA_16_VERSION                   60
 137 
 138 #define JAVA_17_VERSION                   61
 139 
 140 #define JAVA_18_VERSION                   62
 141 
 142 #define JAVA_19_VERSION                   63
 143 


 144 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
 145   assert((bad_constant == JVM_CONSTANT_Module ||
 146           bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
 147          "Unexpected bad constant pool entry");
 148   if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
 149 }
 150 
 151 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
 152                                                   ConstantPool* cp,
 153                                                   const int length,
 154                                                   TRAPS) {
 155   assert(stream != NULL, "invariant");
 156   assert(cp != NULL, "invariant");
 157 
 158   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
 159   // this function (_current can be allocated in a register, with scalar
 160   // replacement of aggregates). The _current pointer is copied back to
 161   // stream() when this function returns. DON'T call another method within
 162   // this method that uses stream().
 163   const ClassFileStream cfs1 = *stream;
 164   const ClassFileStream* const cfs = &cfs1;
 165 
 166   assert(cfs->allocated_on_stack_or_embedded(), "should be local");
 167   debug_only(const u1* const old_current = stream->current();)
 168 
 169   // Used for batching symbol allocations.
 170   const char* names[SymbolTable::symbol_alloc_batch_size];
 171   int lengths[SymbolTable::symbol_alloc_batch_size];
 172   int indices[SymbolTable::symbol_alloc_batch_size];
 173   unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
 174   int names_count = 0;
 175 
 176   // parsing  Index 0 is unused
 177   for (int index = 1; index < length; index++) {
 178     // Each of the following case guarantees one more byte in the stream
 179     // for the following tag or the access_flags following constant pool,
 180     // so we don't need bounds-check for reading tag.
 181     const u1 tag = cfs->get_u1_fast();
 182     switch (tag) {
 183       case JVM_CONSTANT_Class : {
 184         cfs->guarantee_more(3, CHECK);  // name_index, tag/access_flags
 185         const u2 name_index = cfs->get_u2_fast();
 186         cp->klass_index_at_put(index, name_index);
 187         break;
 188       }
 189       case JVM_CONSTANT_Fieldref: {
 190         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 191         const u2 class_index = cfs->get_u2_fast();
 192         const u2 name_and_type_index = cfs->get_u2_fast();
 193         cp->field_at_put(index, class_index, name_and_type_index);
 194         break;
 195       }
 196       case JVM_CONSTANT_Methodref: {
 197         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 198         const u2 class_index = cfs->get_u2_fast();
 199         const u2 name_and_type_index = cfs->get_u2_fast();
 200         cp->method_at_put(index, class_index, name_and_type_index);
 201         break;
 202       }
 203       case JVM_CONSTANT_InterfaceMethodref: {

 484         check_property(valid_symbol_at(name_ref_index),
 485           "Invalid constant pool index %u in class file %s",
 486           name_ref_index, CHECK);
 487         check_property(valid_symbol_at(signature_ref_index),
 488           "Invalid constant pool index %u in class file %s",
 489           signature_ref_index, CHECK);
 490         break;
 491       }
 492       case JVM_CONSTANT_Utf8:
 493         break;
 494       case JVM_CONSTANT_UnresolvedClass:         // fall-through
 495       case JVM_CONSTANT_UnresolvedClassInError: {
 496         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 497         break;
 498       }
 499       case JVM_CONSTANT_ClassIndex: {
 500         const int class_index = cp->klass_index_at(index);
 501         check_property(valid_symbol_at(class_index),
 502           "Invalid constant pool index %u in class file %s",
 503           class_index, CHECK);
 504         cp->unresolved_klass_at_put(index, class_index, num_klasses++);







 505         break;
 506       }
 507       case JVM_CONSTANT_StringIndex: {
 508         const int string_index = cp->string_index_at(index);
 509         check_property(valid_symbol_at(string_index),
 510           "Invalid constant pool index %u in class file %s",
 511           string_index, CHECK);
 512         Symbol* const sym = cp->symbol_at(string_index);
 513         cp->unresolved_string_at_put(index, sym);
 514         break;
 515       }
 516       case JVM_CONSTANT_MethodHandle: {
 517         const int ref_index = cp->method_handle_index_at(index);
 518         check_property(valid_cp_range(ref_index, length),
 519           "Invalid constant pool index %u in class file %s",
 520           ref_index, CHECK);
 521         const constantTag tag = cp->tag_at(ref_index);
 522         const int ref_kind = cp->method_handle_ref_kind_at(index);
 523 
 524         switch (ref_kind) {

 684           cp->signature_ref_index_at(name_and_type_ref_index);
 685         const Symbol* const name = cp->symbol_at(name_ref_index);
 686         const Symbol* const signature = cp->symbol_at(signature_ref_index);
 687         if (tag == JVM_CONSTANT_Fieldref) {
 688           if (_need_verify) {
 689             // Field name and signature are verified above, when iterating NameAndType_info.
 690             // Need only to be sure signature is non-zero length and the right type.
 691             if (Signature::is_method(signature)) {
 692               throwIllegalSignature("Field", name, signature, CHECK);
 693             }
 694           }
 695         } else {
 696           if (_need_verify) {
 697             // Method name and signature are individually verified above, when iterating
 698             // NameAndType_info.  Need to check here that signature is non-zero length and
 699             // the right type.
 700             if (!Signature::is_method(signature)) {
 701               throwIllegalSignature("Method", name, signature, CHECK);
 702             }
 703           }
 704           // If a class method name begins with '<', it must be "<init>" and have void signature.

 705           const unsigned int name_len = name->utf8_length();
 706           if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
 707               name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
 708             if (name != vmSymbols::object_initializer_name()) {
 709               classfile_parse_error(
 710                 "Bad method name at constant pool index %u in class file %s",
 711                 name_ref_index, THREAD);
 712               return;
 713             } else if (!Signature::is_void_method(signature)) { // must have void signature.
 714               throwIllegalSignature("Method", name, signature, CHECK);




 715             }
 716           }
 717         }
 718         break;
 719       }
 720       case JVM_CONSTANT_MethodHandle: {
 721         const int ref_index = cp->method_handle_index_at(index);
 722         const int ref_kind = cp->method_handle_ref_kind_at(index);
 723         switch (ref_kind) {
 724           case JVM_REF_invokeVirtual:
 725           case JVM_REF_invokeStatic:
 726           case JVM_REF_invokeSpecial:
 727           case JVM_REF_newInvokeSpecial: {
 728             const int name_and_type_ref_index =
 729               cp->name_and_type_ref_index_at(ref_index);
 730             const int name_ref_index =
 731               cp->name_ref_index_at(name_and_type_ref_index);
 732             const Symbol* const name = cp->symbol_at(name_ref_index);
 733             if (ref_kind == JVM_REF_newInvokeSpecial) {
 734               if (name != vmSymbols::object_initializer_name()) {
 735                 classfile_parse_error(
 736                   "Bad constructor name at constant pool index %u in class file %s",
 737                     name_ref_index, THREAD);
 738                 return;
 739               }
 740             } else {
 741               if (name == vmSymbols::object_initializer_name()) {











 742                 classfile_parse_error(
 743                   "Bad method name at constant pool index %u in class file %s",
 744                   name_ref_index, THREAD);
 745                 return;
 746               }
 747             }
 748             break;
 749           }
 750           // Other ref_kinds are already fully checked in previous pass.
 751         } // switch(ref_kind)
 752         break;
 753       }
 754       case JVM_CONSTANT_MethodType: {
 755         const Symbol* const no_name = vmSymbols::type_name(); // place holder
 756         const Symbol* const signature = cp->method_type_signature_at(index);
 757         verify_legal_method_signature(no_name, signature, CHECK);
 758         break;
 759       }
 760       case JVM_CONSTANT_Utf8: {
 761         assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");

 799   while (entry != NULL) {
 800     if (entry->_name == name && entry->_sig == sig) {
 801       return false;
 802     }
 803     entry = entry->_next;
 804   }
 805 
 806   // No duplicate is found, allocate a new entry and fill it.
 807   entry = new NameSigHash();
 808   entry->_name = name;
 809   entry->_sig = sig;
 810 
 811   // Insert into hash table
 812   entry->_next = table[index];
 813   table[index] = entry;
 814 
 815   return true;
 816 }
 817 
 818 // Side-effects: populates the _local_interfaces field
 819 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
 820                                        const int itfs_len,
 821                                        ConstantPool* const cp,
 822                                        bool* const has_nonstatic_concrete_methods,







 823                                        TRAPS) {
 824   assert(stream != NULL, "invariant");
 825   assert(cp != NULL, "invariant");
 826   assert(has_nonstatic_concrete_methods != NULL, "invariant");
 827 
 828   if (itfs_len == 0) {
 829     _local_interfaces = Universe::the_empty_instance_klass_array();
 830   } else {
 831     assert(itfs_len > 0, "only called for len>0");
 832     _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
 833 
 834     int index;
 835     for (index = 0; index < itfs_len; index++) {
 836       const u2 interface_index = stream->get_u2(CHECK);
 837       Klass* interf;
 838       check_property(
 839         valid_klass_reference_at(interface_index),
 840         "Interface name has bad constant pool index %u in class file %s",
 841         interface_index, CHECK);
 842       if (cp->tag_at(interface_index).is_klass()) {
 843         interf = cp->resolved_klass_at(interface_index);
 844       } else {
 845         Symbol* const unresolved_klass  = cp->klass_name_at(interface_index);
 846 
 847         // Don't need to check legal name because it's checked when parsing constant pool.
 848         // But need to make sure it's not an array type.
 849         guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
 850                            "Bad interface name in class file %s", CHECK);
 851 
 852         // Call resolve_super so class circularity is checked
 853         interf = SystemDictionary::resolve_super_or_fail(
 854                                                   _class_name,
 855                                                   unresolved_klass,
 856                                                   Handle(THREAD, _loader_data->class_loader()),
 857                                                   _protection_domain,
 858                                                   false,
 859                                                   CHECK);
 860       }
 861 
 862       if (!interf->is_interface()) {
 863         THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
 864                   err_msg("class %s can not implement %s, because it is not an interface (%s)",
 865                           _class_name->as_klass_external_name(),
 866                           interf->external_name(),
 867                           interf->class_in_module_of_loader()));
 868       }
 869 
 870       if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {













 871         *has_nonstatic_concrete_methods = true;
 872       }
 873       _local_interfaces->at_put(index, InstanceKlass::cast(interf));



 874     }
 875 
 876     if (!_need_verify || itfs_len <= 1) {
 877       return;
 878     }
 879 
 880     // Check if there's any duplicates in interfaces
 881     ResourceMark rm(THREAD);
 882     NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
 883                                                                  NameSigHash*,
 884                                                                  HASH_ROW_SIZE);
 885     initialize_hashtable(interface_names);
 886     bool dup = false;
 887     const Symbol* name = NULL;
 888     {
 889       debug_only(NoSafepointVerifier nsv;)
 890       for (index = 0; index < itfs_len; index++) {
 891         const InstanceKlass* const k = _local_interfaces->at(index);
 892         name = k->name();
 893         // If no duplicates, add (name, NULL) in hashtable interface_names.
 894         if (!put_after_lookup(name, NULL, interface_names)) {
 895           dup = true;
 896           break;
 897         }
 898       }
 899     }
 900     if (dup) {
 901       classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
 902                              name->as_C_string(), THREAD);
 903     }
 904   }
 905 }
 906 
 907 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
 908                                            int constantvalue_index,
 909                                            int signature_index,
 910                                            TRAPS) const {
 911   // Make sure the constant pool entry is of a type appropriate to this field

1356                                             CHECK);
1357   parsed_annotations->set_field_annotations(a);
1358   a = assemble_annotations(runtime_visible_type_annotations,
1359                            runtime_visible_type_annotations_length,
1360                            runtime_invisible_type_annotations,
1361                            runtime_invisible_type_annotations_length,
1362                            CHECK);
1363   parsed_annotations->set_field_type_annotations(a);
1364   return;
1365 }
1366 
1367 
1368 // Field allocation types. Used for computing field offsets.
1369 
1370 enum FieldAllocationType {
1371   STATIC_OOP,           // Oops
1372   STATIC_BYTE,          // Boolean, Byte, char
1373   STATIC_SHORT,         // shorts
1374   STATIC_WORD,          // ints
1375   STATIC_DOUBLE,        // aligned long or double

1376   NONSTATIC_OOP,
1377   NONSTATIC_BYTE,
1378   NONSTATIC_SHORT,
1379   NONSTATIC_WORD,
1380   NONSTATIC_DOUBLE,

1381   MAX_FIELD_ALLOCATION_TYPE,
1382   BAD_ALLOCATION_TYPE = -1
1383 };
1384 
1385 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1386   BAD_ALLOCATION_TYPE, // 0
1387   BAD_ALLOCATION_TYPE, // 1
1388   BAD_ALLOCATION_TYPE, // 2
1389   BAD_ALLOCATION_TYPE, // 3
1390   NONSTATIC_BYTE ,     // T_BOOLEAN     =  4,
1391   NONSTATIC_SHORT,     // T_CHAR        =  5,
1392   NONSTATIC_WORD,      // T_FLOAT       =  6,
1393   NONSTATIC_DOUBLE,    // T_DOUBLE      =  7,
1394   NONSTATIC_BYTE,      // T_BYTE        =  8,
1395   NONSTATIC_SHORT,     // T_SHORT       =  9,
1396   NONSTATIC_WORD,      // T_INT         = 10,
1397   NONSTATIC_DOUBLE,    // T_LONG        = 11,
1398   NONSTATIC_OOP,       // T_OBJECT      = 12,
1399   NONSTATIC_OOP,       // T_ARRAY       = 13,
1400   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1401   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1402   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1403   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1404   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1405   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,

1406   BAD_ALLOCATION_TYPE, // 0
1407   BAD_ALLOCATION_TYPE, // 1
1408   BAD_ALLOCATION_TYPE, // 2
1409   BAD_ALLOCATION_TYPE, // 3
1410   STATIC_BYTE ,        // T_BOOLEAN     =  4,
1411   STATIC_SHORT,        // T_CHAR        =  5,
1412   STATIC_WORD,         // T_FLOAT       =  6,
1413   STATIC_DOUBLE,       // T_DOUBLE      =  7,
1414   STATIC_BYTE,         // T_BYTE        =  8,
1415   STATIC_SHORT,        // T_SHORT       =  9,
1416   STATIC_WORD,         // T_INT         = 10,
1417   STATIC_DOUBLE,       // T_LONG        = 11,
1418   STATIC_OOP,          // T_OBJECT      = 12,
1419   STATIC_OOP,          // T_ARRAY       = 13,
1420   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1421   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1422   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1423   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1424   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1425   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,

1426 };
1427 
1428 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1429   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1430   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1431   assert(result != BAD_ALLOCATION_TYPE, "bad type");



1432   return result;
1433 }
1434 
1435 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1436  public:
1437   u2 count[MAX_FIELD_ALLOCATION_TYPE];
1438 
1439   FieldAllocationCount() {
1440     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1441       count[i] = 0;
1442     }
1443   }
1444 
1445   void update(bool is_static, BasicType type) {
1446     FieldAllocationType atype = basic_type_to_atype(is_static, type);
1447     if (atype != BAD_ALLOCATION_TYPE) {
1448       // Make sure there is no overflow with injected fields.
1449       assert(count[atype] < 0xFFFF, "More than 65535 fields");
1450       count[atype]++;
1451     }
1452   }
1453 };
1454 
1455 // Side-effects: populates the _fields, _fields_annotations,
1456 // _fields_type_annotations fields
1457 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1458                                    bool is_interface,


1459                                    FieldAllocationCount* const fac,
1460                                    ConstantPool* cp,
1461                                    const int cp_size,
1462                                    u2* const java_fields_count_ptr,
1463                                    TRAPS) {
1464 
1465   assert(cfs != NULL, "invariant");
1466   assert(fac != NULL, "invariant");
1467   assert(cp != NULL, "invariant");
1468   assert(java_fields_count_ptr != NULL, "invariant");
1469 
1470   assert(NULL == _fields, "invariant");
1471   assert(NULL == _fields_annotations, "invariant");
1472   assert(NULL == _fields_type_annotations, "invariant");
1473 
1474   cfs->guarantee_more(2, CHECK);  // length
1475   const u2 length = cfs->get_u2_fast();
1476   *java_fields_count_ptr = length;
1477 
1478   int num_injected = 0;
1479   const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1480                                                                   &num_injected);
1481   const int total_fields = length + num_injected;




1482 
1483   // The field array starts with tuples of shorts
1484   // [access, name index, sig index, initial value index, byte offset].
1485   // A generic signature slot only exists for field with generic
1486   // signature attribute. And the access flag is set with
1487   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1488   // signature slots are at the end of the field array and after all
1489   // other fields data.
1490   //
1491   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1492   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1493   //       ...
1494   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1495   //       [generic signature index]
1496   //       [generic signature index]
1497   //       ...
1498   //
1499   // Allocate a temporary resource array for field data. For each field,
1500   // a slot is reserved in the temporary array for the generic signature
1501   // index. After parsing all fields, the data are copied to a permanent
1502   // array and any unused slots will be discarded.
1503   ResourceMark rm(THREAD);
1504   u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1505                                               u2,
1506                                               total_fields * (FieldInfo::field_slots + 1));
1507 
1508   // The generic signature slots start after all other fields' data.
1509   int generic_signature_slot = total_fields * FieldInfo::field_slots;
1510   int num_generic_signature = 0;

1511   for (int n = 0; n < length; n++) {
1512     // access_flags, name_index, descriptor_index, attributes_count
1513     cfs->guarantee_more(8, CHECK);
1514 




1515     AccessFlags access_flags;
1516     const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1517     verify_legal_field_modifiers(flags, is_interface, CHECK);
1518     access_flags.set_flags(flags);
1519 
1520     const u2 name_index = cfs->get_u2_fast();
1521     check_property(valid_symbol_at(name_index),
1522       "Invalid constant pool index %u for field name in class file %s",
1523       name_index, CHECK);
1524     const Symbol* const name = cp->symbol_at(name_index);
1525     verify_legal_field_name(name, CHECK);
1526 
1527     const u2 signature_index = cfs->get_u2_fast();
1528     check_property(valid_symbol_at(signature_index),
1529       "Invalid constant pool index %u for field signature in class file %s",
1530       signature_index, CHECK);
1531     const Symbol* const sig = cp->symbol_at(signature_index);
1532     verify_legal_field_signature(name, sig, CHECK);

1533 
1534     u2 constantvalue_index = 0;
1535     bool is_synthetic = false;
1536     u2 generic_signature_index = 0;
1537     const bool is_static = access_flags.is_static();
1538     FieldAnnotationCollector parsed_annotations(_loader_data);
1539 
1540     const u2 attributes_count = cfs->get_u2_fast();
1541     if (attributes_count > 0) {
1542       parse_field_attributes(cfs,
1543                              attributes_count,
1544                              is_static,
1545                              signature_index,
1546                              &constantvalue_index,
1547                              &is_synthetic,
1548                              &generic_signature_index,
1549                              &parsed_annotations,
1550                              CHECK);
1551 
1552       if (parsed_annotations.field_annotations() != NULL) {

1572 
1573       if (is_synthetic) {
1574         access_flags.set_is_synthetic();
1575       }
1576       if (generic_signature_index != 0) {
1577         access_flags.set_field_has_generic_signature();
1578         fa[generic_signature_slot] = generic_signature_index;
1579         generic_signature_slot ++;
1580         num_generic_signature ++;
1581       }
1582     }
1583 
1584     FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1585     field->initialize(access_flags.as_short(),
1586                       name_index,
1587                       signature_index,
1588                       constantvalue_index);
1589     const BasicType type = cp->basic_type_for_signature_at(signature_index);
1590 
1591     // Update FieldAllocationCount for this kind of field
1592     fac->update(is_static, type);
1593 
1594     // After field is initialized with type, we can augment it with aux info
1595     if (parsed_annotations.has_any_annotations()) {
1596       parsed_annotations.apply_to(field);
1597       if (field->is_contended()) {
1598         _has_contended_fields = true;
1599       }
1600     }
1601   }
1602 
1603   int index = length;
1604   if (num_injected != 0) {
1605     for (int n = 0; n < num_injected; n++) {
1606       // Check for duplicates
1607       if (injected[n].may_be_java) {
1608         const Symbol* const name      = injected[n].name();
1609         const Symbol* const signature = injected[n].signature();
1610         bool duplicate = false;
1611         for (int i = 0; i < length; i++) {
1612           const FieldInfo* const f = FieldInfo::from_field_array(fa, i);

1616             duplicate = true;
1617             break;
1618           }
1619         }
1620         if (duplicate) {
1621           // These will be removed from the field array at the end
1622           continue;
1623         }
1624       }
1625 
1626       // Injected field
1627       FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1628       field->initialize((u2)JVM_ACC_FIELD_INTERNAL,
1629                         (u2)(injected[n].name_index),
1630                         (u2)(injected[n].signature_index),
1631                         0);
1632 
1633       const BasicType type = Signature::basic_type(injected[n].signature());
1634 
1635       // Update FieldAllocationCount for this kind of field
1636       fac->update(false, type);
1637       index++;
1638     }
1639   }
1640 



























1641   assert(NULL == _fields, "invariant");
1642 
1643   _fields =
1644     MetadataFactory::new_array<u2>(_loader_data,
1645                                    index * FieldInfo::field_slots + num_generic_signature,
1646                                    CHECK);
1647   // Sometimes injected fields already exist in the Java source so
1648   // the fields array could be too long.  In that case the
1649   // fields array is trimed. Also unused slots that were reserved
1650   // for generic signature indexes are discarded.
1651   {
1652     int i = 0;
1653     for (; i < index * FieldInfo::field_slots; i++) {
1654       _fields->at_put(i, fa[i]);
1655     }
1656     for (int j = total_fields * FieldInfo::field_slots;
1657          j < generic_signature_slot; j++) {
1658       _fields->at_put(i++, fa[j]);
1659     }
1660     assert(_fields->length() == i, "");

1938         "Exception name has bad type at constant pool %u in class file %s",
1939         checked_exception, CHECK_NULL);
1940     }
1941   }
1942   // check exceptions attribute length
1943   if (_need_verify) {
1944     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1945                                                    sizeof(u2) * size),
1946                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1947   }
1948   return checked_exceptions_start;
1949 }
1950 
1951 void ClassFileParser::throwIllegalSignature(const char* type,
1952                                             const Symbol* name,
1953                                             const Symbol* sig,
1954                                             TRAPS) const {
1955   assert(name != NULL, "invariant");
1956   assert(sig != NULL, "invariant");
1957 





1958   ResourceMark rm(THREAD);
1959   Exceptions::fthrow(THREAD_AND_LOCATION,
1960       vmSymbols::java_lang_ClassFormatError(),
1961       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1962       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1963 }
1964 
1965 AnnotationCollector::ID
1966 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1967                                       const Symbol* name,
1968                                       const bool can_access_vm_annotations) {
1969   const vmSymbolID sid = vmSymbols::find_sid(name);
1970   // Privileged code can use all annotations.  Other code silently drops some.
1971   const bool privileged = loader_data->is_boot_class_loader_data() ||
1972                           loader_data->is_platform_class_loader_data() ||
1973                           can_access_vm_annotations;
1974   switch (sid) {
1975     case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1976       if (_location != _in_method)  break;  // only allow for methods
1977       if (!privileged)              break;  // only allow in privileged code
1978       return _method_CallerSensitive;
1979     }
1980     case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1981       if (_location != _in_method)  break;  // only allow for methods
1982       if (!privileged)              break;  // only allow in privileged code

2231                              runtime_visible_type_annotations_length,
2232                              runtime_invisible_type_annotations,
2233                              runtime_invisible_type_annotations_length,
2234                              CHECK);
2235     cm->set_type_annotations(a);
2236   }
2237 }
2238 
2239 
2240 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2241 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2242 // Method* to save footprint, so we only know the size of the resulting Method* when the
2243 // entire method attribute is parsed.
2244 //
2245 // The promoted_flags parameter is used to pass relevant access_flags
2246 // from the method back up to the containing klass. These flag values
2247 // are added to klass's access_flags.
2248 
2249 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2250                                       bool is_interface,


2251                                       const ConstantPool* cp,
2252                                       AccessFlags* const promoted_flags,
2253                                       TRAPS) {
2254   assert(cfs != NULL, "invariant");
2255   assert(cp != NULL, "invariant");
2256   assert(promoted_flags != NULL, "invariant");
2257 
2258   ResourceMark rm(THREAD);
2259   // Parse fixed parts:
2260   // access_flags, name_index, descriptor_index, attributes_count
2261   cfs->guarantee_more(8, CHECK_NULL);
2262 
2263   int flags = cfs->get_u2_fast();
2264   const u2 name_index = cfs->get_u2_fast();
2265   const int cp_size = cp->length();
2266   check_property(
2267     valid_symbol_at(name_index),
2268     "Illegal constant pool index %u for method name in class file %s",
2269     name_index, CHECK_NULL);
2270   const Symbol* const name = cp->symbol_at(name_index);

2272 
2273   const u2 signature_index = cfs->get_u2_fast();
2274   guarantee_property(
2275     valid_symbol_at(signature_index),
2276     "Illegal constant pool index %u for method signature in class file %s",
2277     signature_index, CHECK_NULL);
2278   const Symbol* const signature = cp->symbol_at(signature_index);
2279 
2280   if (name == vmSymbols::class_initializer_name()) {
2281     // We ignore the other access flags for a valid class initializer.
2282     // (JVM Spec 2nd ed., chapter 4.6)
2283     if (_major_version < 51) { // backward compatibility
2284       flags = JVM_ACC_STATIC;
2285     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2286       flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2287     } else {
2288       classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2289       return NULL;
2290     }
2291   } else {
2292     verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2293   }
2294 
2295   if (name == vmSymbols::object_initializer_name() && is_interface) {
2296     classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2297     return NULL;













































2298   }
2299 
2300   int args_size = -1;  // only used when _need_verify is true
2301   if (_need_verify) {
2302     verify_legal_name_with_signature(name, signature, CHECK_NULL);
2303     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2304                  verify_legal_method_signature(name, signature, CHECK_NULL);
2305     if (args_size > MAX_ARGS_SIZE) {
2306       classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2307       return NULL;
2308     }
2309   }
2310 
2311   AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2312 
2313   // Default values for code and exceptions attribute elements
2314   u2 max_stack = 0;
2315   u2 max_locals = 0;
2316   u4 code_length = 0;
2317   const u1* code_start = 0;

2847       _has_finalizer = true;
2848     }
2849   }
2850   if (name == vmSymbols::object_initializer_name() &&
2851       signature == vmSymbols::void_method_signature() &&
2852       m->is_vanilla_constructor()) {
2853     _has_vanilla_constructor = true;
2854   }
2855 
2856   NOT_PRODUCT(m->verify());
2857   return m;
2858 }
2859 
2860 
2861 // The promoted_flags parameter is used to pass relevant access_flags
2862 // from the methods back up to the containing klass. These flag values
2863 // are added to klass's access_flags.
2864 // Side-effects: populates the _methods field in the parser
2865 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2866                                     bool is_interface,


2867                                     AccessFlags* promoted_flags,
2868                                     bool* has_final_method,
2869                                     bool* declares_nonstatic_concrete_methods,
2870                                     TRAPS) {
2871   assert(cfs != NULL, "invariant");
2872   assert(promoted_flags != NULL, "invariant");
2873   assert(has_final_method != NULL, "invariant");
2874   assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2875 
2876   assert(NULL == _methods, "invariant");
2877 
2878   cfs->guarantee_more(2, CHECK);  // length
2879   const u2 length = cfs->get_u2_fast();
2880   if (length == 0) {
2881     _methods = Universe::the_empty_method_array();
2882   } else {
2883     _methods = MetadataFactory::new_array<Method*>(_loader_data,
2884                                                    length,
2885                                                    NULL,
2886                                                    CHECK);
2887 
2888     for (int index = 0; index < length; index++) {
2889       Method* method = parse_method(cfs,
2890                                     is_interface,


2891                                     _cp,
2892                                     promoted_flags,
2893                                     CHECK);
2894 
2895       if (method->is_final()) {
2896         *has_final_method = true;
2897       }
2898       // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2899       // used for interface initialization, and default method inheritance analysis
2900       if (is_interface && !(*declares_nonstatic_concrete_methods)
2901         && !method->is_abstract() && !method->is_static()) {
2902         *declares_nonstatic_concrete_methods = true;
2903       }
2904       _methods->at_put(index, method);
2905     }
2906 
2907     if (_need_verify && length > 1) {
2908       // Check duplicated methods
2909       ResourceMark rm(THREAD);
2910       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(

3147         valid_klass_reference_at(outer_class_info_index),
3148       "outer_class_info_index %u has bad constant type in class file %s",
3149       outer_class_info_index, CHECK_0);
3150 
3151     if (outer_class_info_index != 0) {
3152       const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
3153       char* bytes = (char*)outer_class_name->bytes();
3154       guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
3155                          "Outer class is an array class in class file %s", CHECK_0);
3156     }
3157     // Inner class name
3158     const u2 inner_name_index = cfs->get_u2_fast();
3159     check_property(
3160       inner_name_index == 0 || valid_symbol_at(inner_name_index),
3161       "inner_name_index %u has bad constant type in class file %s",
3162       inner_name_index, CHECK_0);
3163     if (_need_verify) {
3164       guarantee_property(inner_class_info_index != outer_class_info_index,
3165                          "Class is both outer and inner class in class file %s", CHECK_0);
3166     }
3167     // Access flags
3168     jint flags;
3169     // JVM_ACC_MODULE is defined in JDK-9 and later.
3170     if (_major_version >= JAVA_9_VERSION) {
3171       flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3172     } else {
3173       flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;


3174     }




3175     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3176       // Set abstract bit for old class files for backward compatibility
3177       flags |= JVM_ACC_ABSTRACT;
3178     }
3179     verify_legal_class_modifiers(flags, CHECK_0);
3180     AccessFlags inner_access_flags(flags);
3181 
3182     inner_classes->at_put(index++, inner_class_info_index);
3183     inner_classes->at_put(index++, outer_class_info_index);
3184     inner_classes->at_put(index++, inner_name_index);
3185     inner_classes->at_put(index++, inner_access_flags.as_short());
3186   }
3187 
3188   // Check for circular and duplicate entries.
3189   bool has_circularity = false;
3190   if (_need_verify) {
3191     has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3192     if (has_circularity) {
3193       // If circularity check failed then ignore InnerClasses attribute.
3194       MetadataFactory::free_array<u2>(_loader_data, _inner_classes);

3263   if (length > 0) {
3264     int index = 0;
3265     cfs->guarantee_more(2 * length, CHECK_0);
3266     for (int n = 0; n < length; n++) {
3267       const u2 class_info_index = cfs->get_u2_fast();
3268       check_property(
3269         valid_klass_reference_at(class_info_index),
3270         "Permitted subclass class_info_index %u has bad constant type in class file %s",
3271         class_info_index, CHECK_0);
3272       permitted_subclasses->at_put(index++, class_info_index);
3273     }
3274     assert(index == size, "wrong size");
3275   }
3276 
3277   // Restore buffer's current position.
3278   cfs->set_current(current_mark);
3279 
3280   return length;
3281 }
3282 

































3283 //  Record {
3284 //    u2 attribute_name_index;
3285 //    u4 attribute_length;
3286 //    u2 components_count;
3287 //    component_info components[components_count];
3288 //  }
3289 //  component_info {
3290 //    u2 name_index;
3291 //    u2 descriptor_index
3292 //    u2 attributes_count;
3293 //    attribute_info_attributes[attributes_count];
3294 //  }
3295 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3296                                                      const ConstantPool* cp,
3297                                                      const u1* const record_attribute_start,
3298                                                      TRAPS) {
3299   const u1* const current_mark = cfs->current();
3300   int components_count = 0;
3301   unsigned int calculate_attr_size = 0;
3302   if (record_attribute_start != NULL) {

3547   }
3548   guarantee_property(current_start + attribute_byte_length == cfs->current(),
3549                      "Bad length on BootstrapMethods in class file %s",
3550                      CHECK);
3551 }
3552 
3553 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3554                                                  ConstantPool* cp,
3555                  ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3556                                                  TRAPS) {
3557   assert(cfs != NULL, "invariant");
3558   assert(cp != NULL, "invariant");
3559   assert(parsed_annotations != NULL, "invariant");
3560 
3561   // Set inner classes attribute to default sentinel
3562   _inner_classes = Universe::the_empty_short_array();
3563   // Set nest members attribute to default sentinel
3564   _nest_members = Universe::the_empty_short_array();
3565   // Set _permitted_subclasses attribute to default sentinel
3566   _permitted_subclasses = Universe::the_empty_short_array();


3567   cfs->guarantee_more(2, CHECK);  // attributes_count
3568   u2 attributes_count = cfs->get_u2_fast();
3569   bool parsed_sourcefile_attribute = false;
3570   bool parsed_innerclasses_attribute = false;
3571   bool parsed_nest_members_attribute = false;
3572   bool parsed_permitted_subclasses_attribute = false;

3573   bool parsed_nest_host_attribute = false;
3574   bool parsed_record_attribute = false;
3575   bool parsed_enclosingmethod_attribute = false;
3576   bool parsed_bootstrap_methods_attribute = false;
3577   const u1* runtime_visible_annotations = NULL;
3578   int runtime_visible_annotations_length = 0;
3579   const u1* runtime_invisible_annotations = NULL;
3580   int runtime_invisible_annotations_length = 0;
3581   const u1* runtime_visible_type_annotations = NULL;
3582   int runtime_visible_type_annotations_length = 0;
3583   const u1* runtime_invisible_type_annotations = NULL;
3584   int runtime_invisible_type_annotations_length = 0;
3585   bool runtime_invisible_type_annotations_exists = false;
3586   bool runtime_invisible_annotations_exists = false;
3587   bool parsed_source_debug_ext_annotations_exist = false;
3588   const u1* inner_classes_attribute_start = NULL;
3589   u4  inner_classes_attribute_length = 0;
3590   u2  enclosing_method_class_index = 0;
3591   u2  enclosing_method_method_index = 0;
3592   const u1* nest_members_attribute_start = NULL;
3593   u4  nest_members_attribute_length = 0;
3594   const u1* record_attribute_start = NULL;
3595   u4  record_attribute_length = 0;
3596   const u1* permitted_subclasses_attribute_start = NULL;
3597   u4  permitted_subclasses_attribute_length = 0;


3598 
3599   // Iterate over attributes
3600   while (attributes_count--) {
3601     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
3602     const u2 attribute_name_index = cfs->get_u2_fast();
3603     const u4 attribute_length = cfs->get_u4_fast();
3604     check_property(
3605       valid_symbol_at(attribute_name_index),
3606       "Attribute name has bad constant pool index %u in class file %s",
3607       attribute_name_index, CHECK);
3608     const Symbol* const tag = cp->symbol_at(attribute_name_index);
3609     if (tag == vmSymbols::tag_source_file()) {
3610       // Check for SourceFile tag
3611       if (_need_verify) {
3612         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3613       }
3614       if (parsed_sourcefile_attribute) {
3615         classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3616         return;
3617       } else {

3804               return;
3805             }
3806             parsed_record_attribute = true;
3807             record_attribute_start = cfs->current();
3808             record_attribute_length = attribute_length;
3809           } else if (_major_version >= JAVA_17_VERSION) {
3810             if (tag == vmSymbols::tag_permitted_subclasses()) {
3811               if (parsed_permitted_subclasses_attribute) {
3812                 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
3813                 return;
3814               }
3815               // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
3816               if (_access_flags.is_final()) {
3817                 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
3818                 return;
3819               }
3820               parsed_permitted_subclasses_attribute = true;
3821               permitted_subclasses_attribute_start = cfs->current();
3822               permitted_subclasses_attribute_length = attribute_length;
3823             }









3824           }
3825           // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
3826           cfs->skip_u1(attribute_length, CHECK);
3827         } else {
3828           // Unknown attribute
3829           cfs->skip_u1(attribute_length, CHECK);
3830         }
3831       } else {
3832         // Unknown attribute
3833         cfs->skip_u1(attribute_length, CHECK);
3834       }
3835     } else {
3836       // Unknown attribute
3837       cfs->skip_u1(attribute_length, CHECK);
3838     }
3839   }
3840   _class_annotations = assemble_annotations(runtime_visible_annotations,
3841                                             runtime_visible_annotations_length,
3842                                             runtime_invisible_annotations,
3843                                             runtime_invisible_annotations_length,

3884                             CHECK);
3885     if (_need_verify) {
3886       guarantee_property(record_attribute_length == calculated_attr_length,
3887                          "Record attribute has wrong length in class file %s",
3888                          CHECK);
3889     }
3890   }
3891 
3892   if (parsed_permitted_subclasses_attribute) {
3893     const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
3894                             cfs,
3895                             permitted_subclasses_attribute_start,
3896                             CHECK);
3897     if (_need_verify) {
3898       guarantee_property(
3899         permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
3900         "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
3901     }
3902   }
3903 












3904   if (_max_bootstrap_specifier_index >= 0) {
3905     guarantee_property(parsed_bootstrap_methods_attribute,
3906                        "Missing BootstrapMethods attribute in class file %s", CHECK);
3907   }
3908 }
3909 
3910 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3911   assert(k != NULL, "invariant");
3912 
3913   if (_synthetic_flag)
3914     k->set_is_synthetic();
3915   if (_sourcefile_index != 0) {
3916     k->set_source_file_name_index(_sourcefile_index);
3917   }
3918   if (_generic_signature_index != 0) {
3919     k->set_generic_signature_index(_generic_signature_index);
3920   }
3921   if (_sde_buffer != NULL) {
3922     k->set_source_debug_extension(_sde_buffer, _sde_length);
3923   }

3948     // _combined_annotations so these fields can now be cleared.
3949     _class_annotations       = NULL;
3950     _class_type_annotations  = NULL;
3951     _fields_annotations      = NULL;
3952     _fields_type_annotations = NULL;
3953 }
3954 
3955 // Transfer ownership of metadata allocated to the InstanceKlass.
3956 void ClassFileParser::apply_parsed_class_metadata(
3957                                             InstanceKlass* this_klass,
3958                                             int java_fields_count) {
3959   assert(this_klass != NULL, "invariant");
3960 
3961   _cp->set_pool_holder(this_klass);
3962   this_klass->set_constants(_cp);
3963   this_klass->set_fields(_fields, java_fields_count);
3964   this_klass->set_methods(_methods);
3965   this_klass->set_inner_classes(_inner_classes);
3966   this_klass->set_nest_members(_nest_members);
3967   this_klass->set_nest_host_index(_nest_host);

3968   this_klass->set_annotations(_combined_annotations);
3969   this_klass->set_permitted_subclasses(_permitted_subclasses);
3970   this_klass->set_record_components(_record_components);
3971   // Delay the setting of _local_interfaces and _transitive_interfaces until after
3972   // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
3973   // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
3974   // its _super. If an OOM occurs while loading the current klass, its _super field
3975   // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3976   // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3977   // dereferences to the deallocated _transitive_interfaces will result in a crash.
3978 
3979   // Clear out these fields so they don't get deallocated by the destructor
3980   clear_class_metadata();
3981 }
3982 
3983 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3984                                                        int runtime_visible_annotations_length,
3985                                                        const u1* const runtime_invisible_annotations,
3986                                                        int runtime_invisible_annotations_length,
3987                                                        TRAPS) {

3999     }
4000     if (runtime_invisible_annotations != NULL) {
4001       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
4002         int append = runtime_visible_annotations_length+i;
4003         annotations->at_put(append, runtime_invisible_annotations[i]);
4004       }
4005     }
4006   }
4007   return annotations;
4008 }
4009 
4010 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
4011                                                         const int super_class_index,
4012                                                         const bool need_verify,
4013                                                         TRAPS) {
4014   assert(cp != NULL, "invariant");
4015   const InstanceKlass* super_klass = NULL;
4016 
4017   if (super_class_index == 0) {
4018     check_property(_class_name == vmSymbols::java_lang_Object(),
4019                    "Invalid superclass index %u in class file %s",
4020                    super_class_index,
4021                    CHECK_NULL);
4022   } else {
4023     check_property(valid_klass_reference_at(super_class_index),
4024                    "Invalid superclass index %u in class file %s",
4025                    super_class_index,
4026                    CHECK_NULL);
4027     // The class name should be legal because it is checked when parsing constant pool.
4028     // However, make sure it is not an array type.
4029     bool is_array = false;
4030     if (cp->tag_at(super_class_index).is_klass()) {
4031       super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
4032       if (need_verify)
4033         is_array = super_klass->is_array_klass();
4034     } else if (need_verify) {
4035       is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
4036     }
4037     if (need_verify) {
4038       guarantee_property(!is_array,
4039                         "Bad superclass name in class file %s", CHECK_NULL);
4040     }

4141 }
4142 
4143 void OopMapBlocksBuilder::print_on(outputStream* st) const {
4144   st->print_cr("  OopMapBlocks: %3d  /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
4145   if (_nonstatic_oop_map_count > 0) {
4146     OopMapBlock* map = _nonstatic_oop_maps;
4147     OopMapBlock* last_map = last_oop_map();
4148     assert(map <= last_map, "Last less than first");
4149     while (map <= last_map) {
4150       st->print_cr("    Offset: %3d  -%3d Count: %3d", map->offset(),
4151                    map->offset() + map->offset_span() - heapOopSize, map->count());
4152       map++;
4153     }
4154   }
4155 }
4156 
4157 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
4158   print_on(st);
4159 }
4160 



















4161 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4162   assert(ik != NULL, "invariant");
4163 
4164   const Klass* const super = ik->super();
4165 
4166   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4167   // in which case we don't have to register objects as finalizable
4168   if (!_has_empty_finalizer) {
4169     if (_has_finalizer ||
4170         (super != NULL && super->has_finalizer())) {
4171       ik->set_has_finalizer();
4172     }
4173   }
4174 
4175 #ifdef ASSERT
4176   bool f = false;
4177   const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4178                                            vmSymbols::void_method_signature());
4179   if (InstanceKlass::is_finalization_enabled() &&
4180       (m != NULL) && !m->is_empty_method()) {
4181       f = true;
4182   }
4183 
4184   // Spec doesn't prevent agent from redefinition of empty finalizer.
4185   // Despite the fact that it's generally bad idea and redefined finalizer
4186   // will not work as expected we shouldn't abort vm in this case
4187   if (!ik->has_redefined_this_or_super()) {
4188     assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4189   }
4190 #endif
4191 
4192   // Check if this klass supports the java.lang.Cloneable interface
4193   if (vmClasses::Cloneable_klass_loaded()) {
4194     if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {





4195       ik->set_is_cloneable();
4196     }
4197   }
4198 
4199   // Check if this klass has a vanilla default constructor
4200   if (super == NULL) {
4201     // java.lang.Object has empty default constructor
4202     ik->set_has_vanilla_constructor();
4203   } else {
4204     if (super->has_vanilla_constructor() &&
4205         _has_vanilla_constructor) {
4206       ik->set_has_vanilla_constructor();
4207     }
4208 #ifdef ASSERT
4209     bool v = false;
4210     if (super->has_vanilla_constructor()) {
4211       const Method* const constructor =
4212         ik->find_method(vmSymbols::object_initializer_name(),
4213                        vmSymbols::void_method_signature());
4214       if (constructor != NULL && constructor->is_vanilla_constructor()) {
4215         v = true;
4216       }
4217     }
4218     assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4219 #endif
4220   }
4221 
4222   // If it cannot be fast-path allocated, set a bit in the layout helper.
4223   // See documentation of InstanceKlass::can_be_fastpath_allocated().
4224   assert(ik->size_helper() > 0, "layout_helper is initialized");
4225   if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4226       || ik->is_abstract() || ik->is_interface()
4227       || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4228       || ik->size_helper() >= FastAllocateSizeLimit) {
4229     // Forbid fast-path allocation.
4230     const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4231     ik->set_layout_helper(lh);
4232   }
4233 }
4234 





4235 // utility methods for appending an array with check for duplicates
4236 
4237 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4238                               const Array<InstanceKlass*>* const ifs) {
4239   // iterate over new interfaces
4240   for (int i = 0; i < ifs->length(); i++) {
4241     InstanceKlass* const e = ifs->at(i);
4242     assert(e->is_klass() && e->is_interface(), "just checking");
4243     // add new interface
4244     result->append_if_missing(e);
4245   }
4246 }
4247 
4248 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4249                                                             Array<InstanceKlass*>* local_ifs,
4250                                                             ClassLoaderData* loader_data,
4251                                                             TRAPS) {
4252   assert(local_ifs != NULL, "invariant");
4253   assert(loader_data != NULL, "invariant");
4254 

4258   // Add superclass transitive interfaces size
4259   if (super != NULL) {
4260     super_size = super->transitive_interfaces()->length();
4261     max_transitive_size += super_size;
4262   }
4263   // Add local interfaces' super interfaces
4264   const int local_size = local_ifs->length();
4265   for (int i = 0; i < local_size; i++) {
4266     InstanceKlass* const l = local_ifs->at(i);
4267     max_transitive_size += l->transitive_interfaces()->length();
4268   }
4269   // Finally add local interfaces
4270   max_transitive_size += local_size;
4271   // Construct array
4272   if (max_transitive_size == 0) {
4273     // no interfaces, use canonicalized array
4274     return Universe::the_empty_instance_klass_array();
4275   } else if (max_transitive_size == super_size) {
4276     // no new local interfaces added, share superklass' transitive interface array
4277     return super->transitive_interfaces();
4278   } else if (max_transitive_size == local_size) {
4279     // only local interfaces added, share local interface array
4280     return local_ifs;

4281   } else {
4282     ResourceMark rm;
4283     GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4284 
4285     // Copy down from superclass
4286     if (super != NULL) {
4287       append_interfaces(result, super->transitive_interfaces());
4288     }
4289 
4290     // Copy down from local interfaces' superinterfaces
4291     for (int i = 0; i < local_size; i++) {
4292       InstanceKlass* const l = local_ifs->at(i);
4293       append_interfaces(result, l->transitive_interfaces());
4294     }
4295     // Finally add local interfaces
4296     append_interfaces(result, local_ifs);
4297 
4298     // length will be less than the max_transitive_size if duplicates were removed
4299     const int length = result->length();
4300     assert(length <= max_transitive_size, "just checking");

4301     Array<InstanceKlass*>* const new_result =
4302       MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4303     for (int i = 0; i < length; i++) {
4304       InstanceKlass* const e = result->at(i);
4305       assert(e != NULL, "just checking");
4306       new_result->at_put(i, e);
4307     }
4308     return new_result;
4309   }
4310 }
4311 
4312 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4313   assert(this_klass != NULL, "invariant");
4314   const Klass* const super = this_klass->super();
4315 
4316   if (super != NULL) {
4317     const InstanceKlass* super_ik = InstanceKlass::cast(super);
4318 
4319     if (super->is_final()) {
4320       classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4321       return;
4322     }
4323 
4324     if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4325       classfile_icce_error("class %s cannot inherit from sealed class %s", super_ik, THREAD);
4326       return;
4327     }
4328 












4329     // If the loader is not the boot loader then throw an exception if its
4330     // superclass is in package jdk.internal.reflect and its loader is not a
4331     // special reflection class loader
4332     if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4333       PackageEntry* super_package = super->package();
4334       if (super_package != NULL &&
4335           super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4336           !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4337         ResourceMark rm(THREAD);
4338         Exceptions::fthrow(
4339           THREAD_AND_LOCATION,
4340           vmSymbols::java_lang_IllegalAccessError(),
4341           "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4342           this_klass->external_name(),
4343           this_klass->class_loader_data()->loader_name_and_id(),
4344           super->external_name());
4345         return;
4346       }
4347     }
4348 

4494     const Method* const m = methods->at(index);
4495     // if m is static and not the init method, throw a verify error
4496     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4497       ResourceMark rm(THREAD);
4498       Exceptions::fthrow(
4499         THREAD_AND_LOCATION,
4500         vmSymbols::java_lang_VerifyError(),
4501         "Illegal static method %s in interface %s",
4502         m->name()->as_C_string(),
4503         this_klass->external_name()
4504       );
4505       return;
4506     }
4507   }
4508 }
4509 
4510 // utility methods for format checking
4511 
4512 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4513   const bool is_module = (flags & JVM_ACC_MODULE) != 0;



4514   assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");



4515   if (is_module) {
4516     ResourceMark rm(THREAD);
4517     Exceptions::fthrow(
4518       THREAD_AND_LOCATION,
4519       vmSymbols::java_lang_NoClassDefFoundError(),
4520       "%s is not a class because access_flag ACC_MODULE is set",
4521       _class_name->as_C_string());
4522     return;
4523   }
4524 














4525   if (!_need_verify) { return; }
4526 
4527   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
4528   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
4529   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
4530   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
4531   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
4532   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4533   const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4534 
4535   if ((is_abstract && is_final) ||
4536       (is_interface && !is_abstract) ||
4537       (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4538       (!is_interface && major_gte_1_5 && is_annotation)) {



4539     ResourceMark rm(THREAD);




4540     Exceptions::fthrow(
4541       THREAD_AND_LOCATION,
4542       vmSymbols::java_lang_ClassFormatError(),
4543       "Illegal class modifiers in class %s: 0x%X",
4544       _class_name->as_C_string(), flags
4545     );
4546     return;
4547   }
4548 }
4549 
4550 static bool has_illegal_visibility(jint flags) {
4551   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4552   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4553   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4554 
4555   return ((is_public && is_protected) ||
4556           (is_public && is_private) ||
4557           (is_protected && is_private));
4558 }
4559 
4560 // A legal major_version.minor_version must be one of the following:
4561 //
4562 //  Major_version >= 45 and major_version < 56, any minor_version.
4563 //  Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4564 //  Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.

4594         "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4595         "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4596         class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4597       return;
4598     }
4599 
4600     if (!Arguments::enable_preview()) {
4601       classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4602                            class_name, major, minor, THREAD);
4603       return;
4604     }
4605 
4606   } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4607     classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4608                          class_name, major, minor, THREAD);
4609   }
4610 }
4611 
4612 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4613                                                    bool is_interface,


4614                                                    TRAPS) const {
4615   if (!_need_verify) { return; }
4616 
4617   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4618   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4619   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4620   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
4621   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
4622   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
4623   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4624   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
4625   const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4626 
4627   bool is_illegal = false;
4628 
4629   if (is_interface) {
4630     if (!is_public || !is_static || !is_final || is_private ||
4631         is_protected || is_volatile || is_transient ||
4632         (major_gte_1_5 && is_enum)) {
4633       is_illegal = true;
4634     }
4635   } else { // not interface
4636     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4637       is_illegal = true;






4638     }
4639   }
4640 
4641   if (is_illegal) {
4642     ResourceMark rm(THREAD);
4643     Exceptions::fthrow(
4644       THREAD_AND_LOCATION,
4645       vmSymbols::java_lang_ClassFormatError(),
4646       "Illegal field modifiers in class %s: 0x%X",
4647       _class_name->as_C_string(), flags);
4648     return;
4649   }
4650 }
4651 
4652 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4653                                                     bool is_interface,


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 
4673   bool is_illegal = false;
4674 

4675   if (is_interface) {
4676     if (major_gte_8) {
4677       // Class file version is JAVA_8_VERSION or later Methods of
4678       // interfaces may set any of the flags except ACC_PROTECTED,
4679       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4680       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4681       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4682           (is_native || is_protected || is_final || is_synchronized) ||
4683           // If a specific method of a class or interface has its
4684           // ACC_ABSTRACT flag set, it must not have any of its
4685           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4686           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
4687           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4688           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4689           (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4690         is_illegal = true;
4691       }
4692     } else if (major_gte_1_5) {
4693       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4694       if (!is_public || is_private || is_protected || is_static || is_final ||
4695           is_synchronized || is_native || !is_abstract || is_strict) {
4696         is_illegal = true;
4697       }
4698     } else {
4699       // Class file version is pre-JAVA_1_5_VERSION
4700       if (!is_public || is_static || is_final || is_native || !is_abstract) {
4701         is_illegal = true;
4702       }
4703     }
4704   } else { // not interface
4705     if (has_illegal_visibility(flags)) {
4706       is_illegal = true;
4707     } else {
4708       if (is_initializer) {
4709         if (is_static || is_final || is_synchronized || is_native ||
4710             is_abstract || (major_gte_1_5 && is_bridge)) {
4711           is_illegal = true;
4712         }









4713       } else { // not initializer
4714         if (is_abstract) {
4715           if ((is_final || is_native || is_private || is_static ||
4716               (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
4717             is_illegal = true;





4718           }
4719         }
4720       }
4721     }
4722   }
4723 
4724   if (is_illegal) {
4725     ResourceMark rm(THREAD);
4726     Exceptions::fthrow(
4727       THREAD_AND_LOCATION,
4728       vmSymbols::java_lang_ClassFormatError(),
4729       "Method %s in class %s has illegal modifiers: 0x%X",
4730       name->as_C_string(), _class_name->as_C_string(), flags);
4731     return;
4732   }
4733 }
4734 
4735 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4736                                         int length,
4737                                         TRAPS) const {
4738   assert(_need_verify, "only called when _need_verify is true");
4739   if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4740     classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
4741   }
4742 }
4743 
4744 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4745 // In class names, '/' separates unqualified names.  This is verified in this function also.
4746 // Method names also may not contain the characters '<' or '>', unless <init>
4747 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
4748 // method.  Because these names have been checked as special cases before
4749 // calling this method in verify_legal_method_name.
4750 //

4868 // be taken as a field signature. Allow "void" if void_ok.
4869 // Return a pointer to just past the signature.
4870 // Return NULL if no legal signature is found.
4871 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4872                                                        bool void_ok,
4873                                                        unsigned int length,
4874                                                        TRAPS) const {
4875   unsigned int array_dim = 0;
4876   while (length > 0) {
4877     switch (signature[0]) {
4878     case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4879     case JVM_SIGNATURE_BOOLEAN:
4880     case JVM_SIGNATURE_BYTE:
4881     case JVM_SIGNATURE_CHAR:
4882     case JVM_SIGNATURE_SHORT:
4883     case JVM_SIGNATURE_INT:
4884     case JVM_SIGNATURE_FLOAT:
4885     case JVM_SIGNATURE_LONG:
4886     case JVM_SIGNATURE_DOUBLE:
4887       return signature + 1;
4888     case JVM_SIGNATURE_CLASS: {











4889       if (_major_version < JAVA_1_5_VERSION) {
4890         // Skip over the class name if one is there
4891         const char* const p = skip_over_field_name(signature + 1, true, --length);
4892 
4893         // The next character better be a semicolon
4894         if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
4895           return p + 1;
4896         }
4897       }
4898       else {
4899         // Skip leading 'L' and ignore first appearance of ';'
4900         signature++;
4901         const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
4902         // Format check signature
4903         if (c != NULL) {
4904           int newlen = c - (char*) signature;
4905           bool legal = verify_unqualified_name(signature, newlen, LegalClass);
4906           if (!legal) {
4907             classfile_parse_error("Class name is empty or contains illegal character "
4908                                   "in descriptor in class file %s",
4909                                   THREAD);
4910             return NULL;
4911           }
4912           return signature + newlen + 1;
4913         }
4914       }
4915       return NULL;
4916     }
4917     case JVM_SIGNATURE_ARRAY:
4918       array_dim++;
4919       if (array_dim > 255) {

4935 
4936 // Checks if name is a legal class name.
4937 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4938   if (!_need_verify || _relax_verify) { return; }
4939 
4940   assert(name->refcount() > 0, "symbol must be kept alive");
4941   char* bytes = (char*)name->bytes();
4942   unsigned int length = name->utf8_length();
4943   bool legal = false;
4944 
4945   if (length > 0) {
4946     const char* p;
4947     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4948       p = skip_over_field_signature(bytes, false, length, CHECK);
4949       legal = (p != NULL) && ((p - bytes) == (int)length);
4950     } else if (_major_version < JAVA_1_5_VERSION) {
4951       if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
4952         p = skip_over_field_name(bytes, true, length);
4953         legal = (p != NULL) && ((p - bytes) == (int)length);
4954       }




4955     } else {
4956       // 4900761: relax the constraints based on JSR202 spec
4957       // Class names may be drawn from the entire Unicode character set.
4958       // Identifiers between '/' must be unqualified names.
4959       // The utf8 string has been verified when parsing cpool entries.
4960       legal = verify_unqualified_name(bytes, length, LegalClass);
4961     }
4962   }
4963   if (!legal) {
4964     ResourceMark rm(THREAD);
4965     assert(_class_name != NULL, "invariant");
4966     Exceptions::fthrow(
4967       THREAD_AND_LOCATION,
4968       vmSymbols::java_lang_ClassFormatError(),
4969       "Illegal class name \"%.*s\" in class file %s", length, bytes,
4970       _class_name->as_C_string()
4971     );
4972     return;
4973   }
4974 }

5032 
5033   if (!legal) {
5034     ResourceMark rm(THREAD);
5035     assert(_class_name != NULL, "invariant");
5036     Exceptions::fthrow(
5037       THREAD_AND_LOCATION,
5038       vmSymbols::java_lang_ClassFormatError(),
5039       "Illegal method name \"%.*s\" in class %s", length, bytes,
5040       _class_name->as_C_string()
5041     );
5042     return;
5043   }
5044 }
5045 
5046 
5047 // Checks if signature is a legal field signature.
5048 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5049                                                    const Symbol* signature,
5050                                                    TRAPS) const {
5051   if (!_need_verify) { return; }



5052 
5053   const char* const bytes = (const char* const)signature->bytes();
5054   const unsigned int length = signature->utf8_length();
5055   const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5056 
5057   if (p == NULL || (p - bytes) != (int)length) {
5058     throwIllegalSignature("Field", name, signature, CHECK);
5059   }
5060 }
5061 
5062 // Check that the signature is compatible with the method name.  For example,
5063 // check that <init> has a void signature.
5064 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
5065                                                        const Symbol* signature,
5066                                                        TRAPS) const {
5067   if (!_need_verify) {
5068     return;
5069   }
5070 
5071   // Class initializers cannot have args for class format version >= 51.
5072   if (name == vmSymbols::class_initializer_name() &&
5073       signature != vmSymbols::void_method_signature() &&
5074       _major_version >= JAVA_7_VERSION) {
5075     throwIllegalSignature("Method", name, signature, THREAD);
5076     return;
5077   }
5078 
5079   int sig_length = signature->utf8_length();
5080   if (name->utf8_length() > 0 &&

5081       name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
5082       sig_length > 0 &&
5083       signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
5084     throwIllegalSignature("Method", name, signature, THREAD);

5085   }
5086 }
5087 
5088 // Checks if signature is a legal method signature.
5089 // Returns number of parameters
5090 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5091                                                    const Symbol* signature,
5092                                                    TRAPS) const {
5093   if (!_need_verify) {
5094     // make sure caller's args_size will be less than 0 even for non-static
5095     // method so it will be recomputed in compute_size_of_parameters().
5096     return -2;
5097   }
5098 
5099   unsigned int args_size = 0;
5100   const char* p = (const char*)signature->bytes();
5101   unsigned int length = signature->utf8_length();
5102   const char* nextp;
5103 
5104   // The first character must be a '('

5240   }
5241 }
5242 
5243 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5244                                                       const ClassInstanceInfo& cl_inst_info,
5245                                                       TRAPS) {
5246   if (_klass != NULL) {
5247     return _klass;
5248   }
5249 
5250   InstanceKlass* const ik =
5251     InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5252 
5253   if (is_hidden()) {
5254     mangle_hidden_class_name(ik);
5255   }
5256 
5257   fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5258 
5259   assert(_klass == ik, "invariant");
5260 
5261   return ik;
5262 }
5263 































5264 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5265                                           bool changed_by_loadhook,
5266                                           const ClassInstanceInfo& cl_inst_info,
5267                                           TRAPS) {
5268   assert(ik != NULL, "invariant");
5269 
5270   // Set name and CLD before adding to CLD
5271   ik->set_class_loader_data(_loader_data);
5272   ik->set_name(_class_name);
5273 
5274   // Add all classes to our internal class loader list here,
5275   // including classes in the bootstrap (NULL) class loader.
5276   const bool publicize = !is_internal();
5277 
5278   _loader_data->add_class(ik, publicize);
5279 
5280   set_klass_to_deallocate(ik);
5281 
5282   assert(_field_info != NULL, "invariant");
5283   assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5284   assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5285          "sanity");
5286 
5287   assert(ik->is_instance_klass(), "sanity");
5288   assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5289 
5290   // Fill in information already parsed
5291   ik->set_should_verify_class(_need_verify);
5292 
5293   // Not yet: supers are done below to support the new subtype-checking fields
5294   ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5295   ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);








5296   assert(_fac != NULL, "invariant");
5297   ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5298 
5299   // this transfers ownership of a lot of arrays from
5300   // the parser onto the InstanceKlass*
5301   apply_parsed_class_metadata(ik, _java_fields_count);
5302 
5303   // can only set dynamic nest-host after static nest information is set
5304   if (cl_inst_info.dynamic_nest_host() != NULL) {
5305     ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5306   }
5307 
5308   // note that is not safe to use the fields in the parser from this point on
5309   assert(NULL == _cp, "invariant");
5310   assert(NULL == _fields, "invariant");
5311   assert(NULL == _methods, "invariant");
5312   assert(NULL == _inner_classes, "invariant");
5313   assert(NULL == _nest_members, "invariant");

5314   assert(NULL == _combined_annotations, "invariant");
5315   assert(NULL == _record_components, "invariant");
5316   assert(NULL == _permitted_subclasses, "invariant");
5317 
5318   if (_has_final_method) {
5319     ik->set_has_final_method();
5320   }
5321 
5322   ik->copy_method_ordering(_method_ordering, CHECK);
5323   // The InstanceKlass::_methods_jmethod_ids cache
5324   // is managed on the assumption that the initial cache
5325   // size is equal to the number of methods in the class. If
5326   // that changes, then InstanceKlass::idnum_can_increment()
5327   // has to be changed accordingly.
5328   ik->set_initial_method_idnum(ik->methods()->length());
5329 
5330   ik->set_this_class_index(_this_class_index);
5331 
5332   if (_is_hidden) {
5333     // _this_class_index is a CONSTANT_Class entry that refers to this
5334     // hidden class itself. If this class needs to refer to its own methods
5335     // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5336     // _this_class_index. However, because this class is hidden (it's
5337     // not stored in SystemDictionary), _this_class_index cannot be resolved
5338     // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5339     // Therefore, we must eagerly resolve _this_class_index now.
5340     ik->constants()->klass_at_put(_this_class_index, ik);
5341   }
5342 
5343   ik->set_minor_version(_minor_version);
5344   ik->set_major_version(_major_version);
5345   ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5346   ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);



5347 
5348   if (_is_hidden) {
5349     ik->set_is_hidden();
5350   }
5351 
5352   // Set PackageEntry for this_klass
5353   oop cl = ik->class_loader();
5354   Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5355   ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5356   ik->set_package(cld, NULL, CHECK);
5357 
5358   const Array<Method*>* const methods = ik->methods();
5359   assert(methods != NULL, "invariant");
5360   const int methods_len = methods->length();
5361 
5362   check_methods_for_intrinsics(ik, methods);
5363 
5364   // Fill in field values obtained by parse_classfile_attributes
5365   if (_parsed_annotations->has_any_annotations()) {
5366     _parsed_annotations->apply_to(ik);

5434 
5435   assert(_all_mirandas != NULL, "invariant");
5436 
5437   // Generate any default methods - default methods are public interface methods
5438   // that have a default implementation.  This is new with Java 8.
5439   if (_has_nonstatic_concrete_methods) {
5440     DefaultMethods::generate_default_methods(ik,
5441                                              _all_mirandas,
5442                                              CHECK);
5443   }
5444 
5445   // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5446   if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5447       !module_entry->has_default_read_edges()) {
5448     if (!module_entry->set_has_default_read_edges()) {
5449       // We won a potential race
5450       JvmtiExport::add_default_read_edges(module_handle, THREAD);
5451     }
5452   }
5453 



























5454   ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5455 
5456   if (!is_internal()) {
5457     ik->print_class_load_logging(_loader_data, module_entry, _stream);
5458 
5459     if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5460         ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5461         log_is_enabled(Info, class, preview)) {
5462       ResourceMark rm;
5463       log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5464                                ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5465     }
5466 
5467     if (log_is_enabled(Debug, class, resolve))  {
5468       ResourceMark rm;
5469       // print out the superclass.
5470       const char * from = ik->external_name();
5471       if (ik->java_super() != NULL) {
5472         log_debug(class, resolve)("%s %s (super)",
5473                    from,

5524 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5525                                  Symbol* name,
5526                                  ClassLoaderData* loader_data,
5527                                  const ClassLoadInfo* cl_info,
5528                                  Publicity pub_level,
5529                                  TRAPS) :
5530   _stream(stream),
5531   _class_name(NULL),
5532   _loader_data(loader_data),
5533   _is_hidden(cl_info->is_hidden()),
5534   _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5535   _orig_cp_size(0),
5536   _super_klass(),
5537   _cp(NULL),
5538   _fields(NULL),
5539   _methods(NULL),
5540   _inner_classes(NULL),
5541   _nest_members(NULL),
5542   _nest_host(0),
5543   _permitted_subclasses(NULL),

5544   _record_components(NULL),

5545   _local_interfaces(NULL),
5546   _transitive_interfaces(NULL),
5547   _combined_annotations(NULL),
5548   _class_annotations(NULL),
5549   _class_type_annotations(NULL),
5550   _fields_annotations(NULL),
5551   _fields_type_annotations(NULL),
5552   _klass(NULL),
5553   _klass_to_deallocate(NULL),
5554   _parsed_annotations(NULL),
5555   _fac(NULL),
5556   _field_info(NULL),

5557   _method_ordering(NULL),
5558   _all_mirandas(NULL),
5559   _vtable_size(0),
5560   _itable_size(0),
5561   _num_miranda_methods(0),
5562   _rt(REF_NONE),
5563   _protection_domain(cl_info->protection_domain()),
5564   _access_flags(),
5565   _pub_level(pub_level),
5566   _bad_constant_seen(0),
5567   _synthetic_flag(false),
5568   _sde_length(false),
5569   _sde_buffer(NULL),
5570   _sourcefile_index(0),
5571   _generic_signature_index(0),
5572   _major_version(0),
5573   _minor_version(0),
5574   _this_class_index(0),
5575   _super_class_index(0),
5576   _itfs_len(0),
5577   _java_fields_count(0),
5578   _need_verify(false),
5579   _relax_verify(false),
5580   _has_nonstatic_concrete_methods(false),
5581   _declares_nonstatic_concrete_methods(false),
5582   _has_final_method(false),
5583   _has_contended_fields(false),







5584   _has_finalizer(false),
5585   _has_empty_finalizer(false),
5586   _has_vanilla_constructor(false),
5587   _max_bootstrap_specifier_index(-1) {
5588 
5589   _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5590   _class_name->increment_refcount();
5591 
5592   assert(_loader_data != NULL, "invariant");
5593   assert(stream != NULL, "invariant");
5594   assert(_stream != NULL, "invariant");
5595   assert(_stream->buffer() == _stream->current(), "invariant");
5596   assert(_class_name != NULL, "invariant");
5597   assert(0 == _access_flags.as_int(), "invariant");
5598 
5599   // Figure out whether we can skip format checking (matching classic VM behavior)
5600   if (DumpSharedSpaces) {
5601     // verify == true means it's a 'remote' class (i.e., non-boot class)
5602     // Verification decision is based on BytecodeVerificationRemote flag
5603     // for those classes.

5613   stream->set_verify(_need_verify);
5614 
5615   // Check if verification needs to be relaxed for this class file
5616   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5617   _relax_verify = relax_format_check_for(_loader_data);
5618 
5619   parse_stream(stream, CHECK);
5620 
5621   post_process_parsed_stream(stream, _cp, CHECK);
5622 }
5623 
5624 void ClassFileParser::clear_class_metadata() {
5625   // metadata created before the instance klass is created.  Must be
5626   // deallocated if classfile parsing returns an error.
5627   _cp = NULL;
5628   _fields = NULL;
5629   _methods = NULL;
5630   _inner_classes = NULL;
5631   _nest_members = NULL;
5632   _permitted_subclasses = NULL;

5633   _combined_annotations = NULL;
5634   _class_annotations = _class_type_annotations = NULL;
5635   _fields_annotations = _fields_type_annotations = NULL;
5636   _record_components = NULL;
5637 }
5638 
5639 // Destructor to clean up
5640 ClassFileParser::~ClassFileParser() {
5641   _class_name->decrement_refcount();
5642 
5643   if (_cp != NULL) {
5644     MetadataFactory::free_metadata(_loader_data, _cp);
5645   }
5646   if (_fields != NULL) {
5647     MetadataFactory::free_array<u2>(_loader_data, _fields);
5648   }
5649 




5650   if (_methods != NULL) {
5651     // Free methods
5652     InstanceKlass::deallocate_methods(_loader_data, _methods);
5653   }
5654 
5655   // beware of the Universe::empty_blah_array!!
5656   if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5657     MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5658   }
5659 
5660   if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5661     MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5662   }
5663 
5664   if (_record_components != NULL) {
5665     InstanceKlass::deallocate_record_components(_loader_data, _record_components);
5666   }
5667 
5668   if (_permitted_subclasses != NULL && _permitted_subclasses != Universe::the_empty_short_array()) {
5669     MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
5670   }
5671 




5672   // Free interfaces
5673   InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5674                                        _local_interfaces, _transitive_interfaces);
5675 
5676   if (_combined_annotations != NULL) {
5677     // After all annotations arrays have been created, they are installed into the
5678     // Annotations object that will be assigned to the InstanceKlass being created.
5679 
5680     // Deallocate the Annotations object and the installed annotations arrays.
5681     _combined_annotations->deallocate_contents(_loader_data);
5682 
5683     // If the _combined_annotations pointer is non-NULL,
5684     // then the other annotations fields should have been cleared.
5685     assert(_class_annotations       == NULL, "Should have been cleared");
5686     assert(_class_type_annotations  == NULL, "Should have been cleared");
5687     assert(_fields_annotations      == NULL, "Should have been cleared");
5688     assert(_fields_type_annotations == NULL, "Should have been cleared");
5689   } else {
5690     // If the annotations arrays were not installed into the Annotations object,
5691     // then they have to be deallocated explicitly.

5736     cp_size, CHECK);
5737 
5738   _orig_cp_size = cp_size;
5739   if (is_hidden()) { // Add a slot for hidden class name.
5740     cp_size++;
5741   }
5742 
5743   _cp = ConstantPool::allocate(_loader_data,
5744                                cp_size,
5745                                CHECK);
5746 
5747   ConstantPool* const cp = _cp;
5748 
5749   parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
5750 
5751   assert(cp_size == (const u2)cp->length(), "invariant");
5752 
5753   // ACCESS FLAGS
5754   stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
5755 
5756   // Access flags
5757   jint flags;
5758   // JVM_ACC_MODULE is defined in JDK-9 and later.
5759   if (_major_version >= JAVA_9_VERSION) {
5760     flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
5761   } else {
5762     flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5763   }







5764 
5765   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5766     // Set abstract bit for old class files for backward compatibility
5767     flags |= JVM_ACC_ABSTRACT;
5768   }
5769 
5770   verify_legal_class_modifiers(flags, CHECK);
5771 
5772   short bad_constant = class_bad_constant_seen();
5773   if (bad_constant != 0) {
5774     // Do not throw CFE until after the access_flags are checked because if
5775     // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
5776     classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
5777     return;
5778   }
5779 
5780   _access_flags.set_flags(flags);
5781 
5782   // This class and superclass
5783   _this_class_index = stream->get_u2_fast();

5850       if (stream->source() != NULL) {
5851         ls.print(" source: %s", stream->source());
5852       }
5853       ls.cr();
5854     }
5855   }
5856 
5857   // SUPERKLASS
5858   _super_class_index = stream->get_u2_fast();
5859   _super_klass = parse_super_class(cp,
5860                                    _super_class_index,
5861                                    _need_verify,
5862                                    CHECK);
5863 
5864   // Interfaces
5865   _itfs_len = stream->get_u2_fast();
5866   parse_interfaces(stream,
5867                    _itfs_len,
5868                    cp,
5869                    &_has_nonstatic_concrete_methods,

5870                    CHECK);
5871 
5872   assert(_local_interfaces != NULL, "invariant");
5873 
5874   // Fields (offsets are filled in later)
5875   _fac = new FieldAllocationCount();
5876   parse_fields(stream,
5877                _access_flags.is_interface(),


5878                _fac,
5879                cp,
5880                cp_size,
5881                &_java_fields_count,
5882                CHECK);
5883 
5884   assert(_fields != NULL, "invariant");
5885 
5886   // Methods
5887   AccessFlags promoted_flags;
5888   parse_methods(stream,
5889                 _access_flags.is_interface(),


5890                 &promoted_flags,
5891                 &_has_final_method,
5892                 &_declares_nonstatic_concrete_methods,
5893                 CHECK);
5894 
5895   assert(_methods != NULL, "invariant");
5896 
5897   // promote flags from parse_methods() to the klass' flags
5898   _access_flags.add_promoted_flags(promoted_flags.as_int());
5899 
5900   if (_declares_nonstatic_concrete_methods) {
5901     _has_nonstatic_concrete_methods = true;
5902   }
5903 
5904   // Additional attributes/annotations
5905   _parsed_annotations = new ClassAnnotationCollector();
5906   parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5907 
5908   assert(_inner_classes != NULL, "invariant");
5909 

5951 
5952   // Update this_class_index's slot in the constant pool with the new Utf8 entry.
5953   // We have to update the resolved_klass_index and the name_index together
5954   // so extract the existing resolved_klass_index first.
5955   CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
5956   int resolved_klass_index = cp_klass_slot.resolved_klass_index();
5957   _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
5958   assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
5959          "Bad name_index");
5960 }
5961 
5962 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5963                                                  ConstantPool* cp,
5964                                                  TRAPS) {
5965   assert(stream != NULL, "invariant");
5966   assert(stream->at_eos(), "invariant");
5967   assert(cp != NULL, "invariant");
5968   assert(_loader_data != NULL, "invariant");
5969 
5970   if (_class_name == vmSymbols::java_lang_Object()) {
5971     check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
5972                    "java.lang.Object cannot implement an interface in class file %s",
5973                    CHECK);
5974   }
5975   // We check super class after class file is parsed and format is checked
5976   if (_super_class_index > 0 && NULL == _super_klass) {
5977     Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5978     if (_access_flags.is_interface()) {
5979       // Before attempting to resolve the superclass, check for class format
5980       // errors not checked yet.
5981       guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5982         "Interfaces must have java.lang.Object as superclass in class file %s",
5983         CHECK);
5984     }
5985     Handle loader(THREAD, _loader_data->class_loader());
5986     _super_klass = (const InstanceKlass*)
5987                        SystemDictionary::resolve_super_or_fail(_class_name,
5988                                                                super_class_name,
5989                                                                loader,
5990                                                                _protection_domain,
5991                                                                true,
5992                                                                CHECK);
5993   }
5994 
5995   if (_super_klass != NULL) {
5996     if (_super_klass->has_nonstatic_concrete_methods()) {
5997       _has_nonstatic_concrete_methods = true;
5998     }



5999 
6000     if (_super_klass->is_interface()) {
6001       classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
6002       return;
6003     }










6004   }
6005 

































6006   // Compute the transitive list of all unique interfaces implemented by this class
6007   _transitive_interfaces =
6008     compute_transitive_interfaces(_super_klass,
6009                                   _local_interfaces,
6010                                   _loader_data,
6011                                   CHECK);
6012 
6013   assert(_transitive_interfaces != NULL, "invariant");
6014 
6015   // sort methods
6016   _method_ordering = sort_methods(_methods);
6017 
6018   _all_mirandas = new GrowableArray<Method*>(20);
6019 
6020   Handle loader(THREAD, _loader_data->class_loader());
6021   klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6022                                                     &_num_miranda_methods,
6023                                                     _all_mirandas,
6024                                                     _super_klass,
6025                                                     _methods,
6026                                                     _access_flags,
6027                                                     _major_version,
6028                                                     loader,
6029                                                     _class_name,
6030                                                     _local_interfaces);
6031 
6032   // Size of Java itable (in words)
6033   _itable_size = _access_flags.is_interface() ? 0 :
6034     klassItable::compute_itable_size(_transitive_interfaces);
6035 
6036   assert(_fac != NULL, "invariant");
6037   assert(_parsed_annotations != NULL, "invariant");
6038 


























6039   _field_info = new FieldLayoutInfo();
6040   FieldLayoutBuilder lb(class_name(), super_klass(), _cp, _fields,
6041                         _parsed_annotations->is_contended(), _field_info);
6042   lb.build_layout();







6043 
6044   // Compute reference typ
6045   _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6046 
6047 }
6048 
6049 void ClassFileParser::set_klass(InstanceKlass* klass) {
6050 
6051 #ifdef ASSERT
6052   if (klass != NULL) {
6053     assert(NULL == _klass, "leaking?");
6054   }
6055 #endif
6056 
6057   _klass = klass;
6058 }
6059 
6060 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6061 
6062 #ifdef ASSERT
6063   if (klass != NULL) {
6064     assert(NULL == _klass_to_deallocate, "leaking?");
6065   }
6066 #endif
6067 
6068   _klass_to_deallocate = klass;
6069 }
6070 
6071 // Caller responsible for ResourceMark
6072 // clone stream with rewound position
6073 const ClassFileStream* ClassFileParser::clone_stream() const {
6074   assert(_stream != NULL, "invariant");
6075 
6076   return _stream->clone();
6077 }

6078 // ----------------------------------------------------------------------------
6079 // debugging
6080 
6081 #ifdef ASSERT
6082 
6083 // return true if class_name contains no '.' (internal format is '/')
6084 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6085   if (class_name != NULL) {
6086     ResourceMark rm;
6087     char* name = class_name->as_C_string();
6088     return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6089   } else {
6090     return true;
6091   }
6092 }
6093 
6094 #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 "precompiled.hpp"
  26 #include "jvm.h"
  27 #include "classfile/classFileParser.hpp"
  28 #include "classfile/classFileStream.hpp"
  29 #include "classfile/classLoader.hpp"
  30 #include "classfile/classLoaderData.inline.hpp"
  31 #include "classfile/classLoadInfo.hpp"
  32 #include "classfile/defaultMethods.hpp"
  33 #include "classfile/fieldLayoutBuilder.hpp"
  34 #include "classfile/javaClasses.inline.hpp"
  35 #include "classfile/moduleEntry.hpp"
  36 #include "classfile/packageEntry.hpp"
  37 #include "classfile/symbolTable.hpp"
  38 #include "classfile/systemDictionary.hpp"
  39 #include "classfile/verificationType.hpp"
  40 #include "classfile/verifier.hpp"
  41 #include "classfile/vmClasses.hpp"
  42 #include "classfile/vmSymbols.hpp"
  43 #include "logging/log.hpp"
  44 #include "logging/logStream.hpp"
  45 #include "memory/allocation.hpp"
  46 #include "memory/metadataFactory.hpp"
  47 #include "memory/oopFactory.hpp"
  48 #include "memory/resourceArea.hpp"
  49 #include "memory/universe.hpp"
  50 #include "oops/annotations.hpp"
  51 #include "oops/constantPool.inline.hpp"
  52 #include "oops/fieldStreams.inline.hpp"
  53 #include "oops/inlineKlass.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/copy.hpp"
  80 #include "utilities/formatBuffer.hpp"
  81 #include "utilities/exceptions.hpp"
  82 #include "utilities/globalDefinitions.hpp"
  83 #include "utilities/growableArray.hpp"
  84 #include "utilities/macros.hpp"
  85 #include "utilities/ostream.hpp"
  86 #include "utilities/resourceHash.hpp"
  87 #include "utilities/stringUtils.hpp"
  88 #include "utilities/utf8.hpp"
  89 
  90 #if INCLUDE_CDS
  91 #include "classfile/systemDictionaryShared.hpp"
  92 #endif
  93 #if INCLUDE_JFR
  94 #include "jfr/support/jfrTraceIdExtension.hpp"
  95 #endif
  96 
  97 // We generally try to create the oops directly when parsing, rather than
  98 // allocating temporary data structures and copying the bytes twice. A
  99 // temporary area is only needed when parsing utf8 entries in the constant
 100 // pool and when parsing line number tables.
 101 
 102 // We add assert in debug mode when class format is not checked.
 103 
 104 #define JAVA_CLASSFILE_MAGIC              0xCAFEBABE
 105 #define JAVA_MIN_SUPPORTED_VERSION        45
 106 #define JAVA_PREVIEW_MINOR_VERSION        65535
 107 

 127 #define JAVA_10_VERSION                   54
 128 
 129 #define JAVA_11_VERSION                   55
 130 
 131 #define JAVA_12_VERSION                   56
 132 
 133 #define JAVA_13_VERSION                   57
 134 
 135 #define JAVA_14_VERSION                   58
 136 
 137 #define JAVA_15_VERSION                   59
 138 
 139 #define JAVA_16_VERSION                   60
 140 
 141 #define JAVA_17_VERSION                   61
 142 
 143 #define JAVA_18_VERSION                   62
 144 
 145 #define JAVA_19_VERSION                   63
 146 
 147 #define CONSTANT_CLASS_DESCRIPTORS        63
 148 
 149 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
 150   assert((bad_constant == JVM_CONSTANT_Module ||
 151           bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
 152          "Unexpected bad constant pool entry");
 153   if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
 154 }
 155 
 156 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
 157                                                   ConstantPool* cp,
 158                                                   const int length,
 159                                                   TRAPS) {
 160   assert(stream != NULL, "invariant");
 161   assert(cp != NULL, "invariant");
 162 
 163   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
 164   // this function (_current can be allocated in a register, with scalar
 165   // replacement of aggregates). The _current pointer is copied back to
 166   // stream() when this function returns. DON'T call another method within
 167   // this method that uses stream().
 168   const ClassFileStream cfs1 = *stream;
 169   const ClassFileStream* const cfs = &cfs1;
 170 
 171   assert(cfs->allocated_on_stack_or_embedded(), "should be local");
 172   debug_only(const u1* const old_current = stream->current();)
 173 
 174   // Used for batching symbol allocations.
 175   const char* names[SymbolTable::symbol_alloc_batch_size];
 176   int lengths[SymbolTable::symbol_alloc_batch_size];
 177   int indices[SymbolTable::symbol_alloc_batch_size];
 178   unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
 179   int names_count = 0;
 180 
 181   // parsing  Index 0 is unused
 182   for (int index = 1; index < length; index++) {
 183     // Each of the following case guarantees one more byte in the stream
 184     // for the following tag or the access_flags following constant pool,
 185     // so we don't need bounds-check for reading tag.
 186     const u1 tag = cfs->get_u1_fast();
 187     switch (tag) {
 188       case JVM_CONSTANT_Class: {
 189         cfs->guarantee_more(3, CHECK);  // name_index, tag/access_flags
 190         const u2 name_index = cfs->get_u2_fast();
 191         cp->klass_index_at_put(index, name_index);
 192         break;
 193       }
 194       case JVM_CONSTANT_Fieldref: {
 195         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 196         const u2 class_index = cfs->get_u2_fast();
 197         const u2 name_and_type_index = cfs->get_u2_fast();
 198         cp->field_at_put(index, class_index, name_and_type_index);
 199         break;
 200       }
 201       case JVM_CONSTANT_Methodref: {
 202         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 203         const u2 class_index = cfs->get_u2_fast();
 204         const u2 name_and_type_index = cfs->get_u2_fast();
 205         cp->method_at_put(index, class_index, name_and_type_index);
 206         break;
 207       }
 208       case JVM_CONSTANT_InterfaceMethodref: {

 489         check_property(valid_symbol_at(name_ref_index),
 490           "Invalid constant pool index %u in class file %s",
 491           name_ref_index, CHECK);
 492         check_property(valid_symbol_at(signature_ref_index),
 493           "Invalid constant pool index %u in class file %s",
 494           signature_ref_index, CHECK);
 495         break;
 496       }
 497       case JVM_CONSTANT_Utf8:
 498         break;
 499       case JVM_CONSTANT_UnresolvedClass:         // fall-through
 500       case JVM_CONSTANT_UnresolvedClassInError: {
 501         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 502         break;
 503       }
 504       case JVM_CONSTANT_ClassIndex: {
 505         const int class_index = cp->klass_index_at(index);
 506         check_property(valid_symbol_at(class_index),
 507           "Invalid constant pool index %u in class file %s",
 508           class_index, CHECK);
 509 
 510         Symbol* const name = cp->symbol_at(class_index);
 511         const unsigned int name_len = name->utf8_length();
 512         if (name->is_Q_signature()) {
 513           cp->unresolved_qdescriptor_at_put(index, class_index, num_klasses++);
 514         } else {
 515           cp->unresolved_klass_at_put(index, class_index, num_klasses++);
 516         }
 517         break;
 518       }
 519       case JVM_CONSTANT_StringIndex: {
 520         const int string_index = cp->string_index_at(index);
 521         check_property(valid_symbol_at(string_index),
 522           "Invalid constant pool index %u in class file %s",
 523           string_index, CHECK);
 524         Symbol* const sym = cp->symbol_at(string_index);
 525         cp->unresolved_string_at_put(index, sym);
 526         break;
 527       }
 528       case JVM_CONSTANT_MethodHandle: {
 529         const int ref_index = cp->method_handle_index_at(index);
 530         check_property(valid_cp_range(ref_index, length),
 531           "Invalid constant pool index %u in class file %s",
 532           ref_index, CHECK);
 533         const constantTag tag = cp->tag_at(ref_index);
 534         const int ref_kind = cp->method_handle_ref_kind_at(index);
 535 
 536         switch (ref_kind) {

 696           cp->signature_ref_index_at(name_and_type_ref_index);
 697         const Symbol* const name = cp->symbol_at(name_ref_index);
 698         const Symbol* const signature = cp->symbol_at(signature_ref_index);
 699         if (tag == JVM_CONSTANT_Fieldref) {
 700           if (_need_verify) {
 701             // Field name and signature are verified above, when iterating NameAndType_info.
 702             // Need only to be sure signature is non-zero length and the right type.
 703             if (Signature::is_method(signature)) {
 704               throwIllegalSignature("Field", name, signature, CHECK);
 705             }
 706           }
 707         } else {
 708           if (_need_verify) {
 709             // Method name and signature are individually verified above, when iterating
 710             // NameAndType_info.  Need to check here that signature is non-zero length and
 711             // the right type.
 712             if (!Signature::is_method(signature)) {
 713               throwIllegalSignature("Method", name, signature, CHECK);
 714             }
 715           }
 716           // If a class method name begins with '<', it must be "<init>" and have void signature
 717           // unless it's an inline type.
 718           const unsigned int name_len = name->utf8_length();
 719           if (tag == JVM_CONSTANT_Methodref && name_len != 0 &&
 720               name->char_at(0) == JVM_SIGNATURE_SPECIAL) {
 721             if (name != vmSymbols::object_initializer_name()) {
 722               classfile_parse_error(
 723                 "Bad method name at constant pool index %u in class file %s",
 724                 name_ref_index, THREAD);
 725               return;
 726             } else if (!Signature::is_void_method(signature)) {
 727               // if return type is non-void then it cannot be a basic primitive
 728               // and primitve types must be supported.
 729               if (!signature->ends_with(JVM_SIGNATURE_ENDCLASS) || !EnableValhalla) {
 730                 throwIllegalSignature("Method", name, signature, CHECK);
 731               }
 732             }
 733           }
 734         }
 735         break;
 736       }
 737       case JVM_CONSTANT_MethodHandle: {
 738         const int ref_index = cp->method_handle_index_at(index);
 739         const int ref_kind = cp->method_handle_ref_kind_at(index);
 740         switch (ref_kind) {
 741           case JVM_REF_invokeVirtual:
 742           case JVM_REF_invokeStatic:
 743           case JVM_REF_invokeSpecial:
 744           case JVM_REF_newInvokeSpecial: {
 745             const int name_and_type_ref_index =
 746               cp->name_and_type_ref_index_at(ref_index);
 747             const int name_ref_index =
 748               cp->name_ref_index_at(name_and_type_ref_index);
 749             const Symbol* const name = cp->symbol_at(name_ref_index);
 750             if (name != vmSymbols::object_initializer_name()) {
 751               if (ref_kind == JVM_REF_newInvokeSpecial) {
 752                 classfile_parse_error(
 753                   "Bad constructor name at constant pool index %u in class file %s",
 754                     name_ref_index, THREAD);
 755                 return;
 756               }
 757             } else {
 758               // The allowed invocation mode of <init> depends on its signature.
 759               // This test corresponds to verify_invoke_instructions in the verifier.
 760               const int signature_ref_index =
 761                 cp->signature_ref_index_at(name_and_type_ref_index);
 762               const Symbol* const signature = cp->symbol_at(signature_ref_index);
 763               if (signature->is_void_method_signature()
 764                   && ref_kind == JVM_REF_newInvokeSpecial) {
 765                 // OK, could be a constructor call
 766               } else if (!signature->is_void_method_signature()
 767                          && ref_kind == JVM_REF_invokeStatic) {
 768                 // also OK, could be a static factory call
 769               } else {
 770                 classfile_parse_error(
 771                   "Bad method name at constant pool index %u in class file %s",
 772                   name_ref_index, THREAD);
 773                 return;
 774               }
 775             }
 776             break;
 777           }
 778           // Other ref_kinds are already fully checked in previous pass.
 779         } // switch(ref_kind)
 780         break;
 781       }
 782       case JVM_CONSTANT_MethodType: {
 783         const Symbol* const no_name = vmSymbols::type_name(); // place holder
 784         const Symbol* const signature = cp->method_type_signature_at(index);
 785         verify_legal_method_signature(no_name, signature, CHECK);
 786         break;
 787       }
 788       case JVM_CONSTANT_Utf8: {
 789         assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");

 827   while (entry != NULL) {
 828     if (entry->_name == name && entry->_sig == sig) {
 829       return false;
 830     }
 831     entry = entry->_next;
 832   }
 833 
 834   // No duplicate is found, allocate a new entry and fill it.
 835   entry = new NameSigHash();
 836   entry->_name = name;
 837   entry->_sig = sig;
 838 
 839   // Insert into hash table
 840   entry->_next = table[index];
 841   table[index] = entry;
 842 
 843   return true;
 844 }
 845 
 846 // Side-effects: populates the _local_interfaces field
 847 void ClassFileParser::parse_interfaces(const ClassFileStream* stream,
 848                                        int itfs_len,
 849                                        ConstantPool* cp,
 850                                        bool* const has_nonstatic_concrete_methods,
 851                                        // FIXME: lots of these functions
 852                                        // declare their parameters as const,
 853                                        // which adds only noise to the code.
 854                                        // Remove the spurious const modifiers.
 855                                        // Many are of the form "const int x"
 856                                        // or "T* const x".
 857                                        bool* const is_declared_atomic,
 858                                        TRAPS) {
 859   assert(stream != NULL, "invariant");
 860   assert(cp != NULL, "invariant");
 861   assert(has_nonstatic_concrete_methods != NULL, "invariant");
 862 
 863   if (itfs_len == 0) {
 864     _temp_local_interfaces = new GrowableArray<InstanceKlass*>(0);
 865   } else {
 866     assert(itfs_len > 0, "only called for len>0");
 867     _temp_local_interfaces = new GrowableArray<InstanceKlass*>(itfs_len);
 868     int index = 0;

 869     for (index = 0; index < itfs_len; index++) {
 870       const u2 interface_index = stream->get_u2(CHECK);
 871       Klass* interf;
 872       check_property(
 873         valid_klass_reference_at(interface_index),
 874         "Interface name has bad constant pool index %u in class file %s",
 875         interface_index, CHECK);
 876       if (cp->tag_at(interface_index).is_klass()) {
 877         interf = cp->resolved_klass_at(interface_index);
 878       } else {
 879         Symbol* const unresolved_klass  = cp->klass_name_at(interface_index);
 880 
 881         // Don't need to check legal name because it's checked when parsing constant pool.
 882         // But need to make sure it's not an array type.
 883         guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
 884                            "Bad interface name in class file %s", CHECK);
 885 
 886         // Call resolve_super so class circularity is checked
 887         interf = SystemDictionary::resolve_super_or_fail(
 888                                                   _class_name,
 889                                                   unresolved_klass,
 890                                                   Handle(THREAD, _loader_data->class_loader()),
 891                                                   _protection_domain,
 892                                                   false,
 893                                                   CHECK);
 894       }
 895 
 896       if (!interf->is_interface()) {
 897         THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
 898                   err_msg("class %s can not implement %s, because it is not an interface (%s)",
 899                           _class_name->as_klass_external_name(),
 900                           interf->external_name(),
 901                           interf->class_in_module_of_loader()));
 902       }
 903 
 904       InstanceKlass* ik = InstanceKlass::cast(interf);
 905       if (is_inline_type() && ik->invalid_inline_super()) {
 906         ResourceMark rm(THREAD);
 907         Exceptions::fthrow(
 908           THREAD_AND_LOCATION,
 909           vmSymbols::java_lang_IncompatibleClassChangeError(),
 910           "Inline type %s has an identity type as supertype",
 911           _class_name->as_klass_external_name());
 912         return;
 913       }
 914       if (ik->invalid_inline_super()) {
 915         set_invalid_inline_super();
 916       }
 917       if (ik->has_nonstatic_concrete_methods()) {
 918         *has_nonstatic_concrete_methods = true;
 919       }
 920       if (ik->is_declared_atomic()) {
 921         *is_declared_atomic = true;
 922       }
 923       _temp_local_interfaces->append(ik);
 924     }
 925 
 926     if (!_need_verify || itfs_len <= 1) {
 927       return;
 928     }
 929 
 930     // Check if there's any duplicates in interfaces
 931     ResourceMark rm(THREAD);
 932     NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
 933                                                                  NameSigHash*,
 934                                                                  HASH_ROW_SIZE);
 935     initialize_hashtable(interface_names);
 936     bool dup = false;
 937     const Symbol* name = NULL;
 938     {
 939       debug_only(NoSafepointVerifier nsv;)
 940       for (index = 0; index < itfs_len; index++) {
 941         const InstanceKlass* const k = _temp_local_interfaces->at(index);
 942         name = k->name();
 943         // If no duplicates, add (name, NULL) in hashtable interface_names.
 944         if (!put_after_lookup(name, NULL, interface_names)) {
 945           dup = true;
 946           break;
 947         }
 948       }
 949     }
 950     if (dup) {
 951       classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
 952                              name->as_C_string(), THREAD);
 953     }
 954   }
 955 }
 956 
 957 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
 958                                            int constantvalue_index,
 959                                            int signature_index,
 960                                            TRAPS) const {
 961   // Make sure the constant pool entry is of a type appropriate to this field

1406                                             CHECK);
1407   parsed_annotations->set_field_annotations(a);
1408   a = assemble_annotations(runtime_visible_type_annotations,
1409                            runtime_visible_type_annotations_length,
1410                            runtime_invisible_type_annotations,
1411                            runtime_invisible_type_annotations_length,
1412                            CHECK);
1413   parsed_annotations->set_field_type_annotations(a);
1414   return;
1415 }
1416 
1417 
1418 // Field allocation types. Used for computing field offsets.
1419 
1420 enum FieldAllocationType {
1421   STATIC_OOP,           // Oops
1422   STATIC_BYTE,          // Boolean, Byte, char
1423   STATIC_SHORT,         // shorts
1424   STATIC_WORD,          // ints
1425   STATIC_DOUBLE,        // aligned long or double
1426   STATIC_INLINE,        // inline type field
1427   NONSTATIC_OOP,
1428   NONSTATIC_BYTE,
1429   NONSTATIC_SHORT,
1430   NONSTATIC_WORD,
1431   NONSTATIC_DOUBLE,
1432   NONSTATIC_INLINE,
1433   MAX_FIELD_ALLOCATION_TYPE,
1434   BAD_ALLOCATION_TYPE = -1
1435 };
1436 
1437 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1438   BAD_ALLOCATION_TYPE, // 0
1439   BAD_ALLOCATION_TYPE, // 1
1440   BAD_ALLOCATION_TYPE, // 2
1441   BAD_ALLOCATION_TYPE, // 3
1442   NONSTATIC_BYTE ,     // T_BOOLEAN     =  4,
1443   NONSTATIC_SHORT,     // T_CHAR        =  5,
1444   NONSTATIC_WORD,      // T_FLOAT       =  6,
1445   NONSTATIC_DOUBLE,    // T_DOUBLE      =  7,
1446   NONSTATIC_BYTE,      // T_BYTE        =  8,
1447   NONSTATIC_SHORT,     // T_SHORT       =  9,
1448   NONSTATIC_WORD,      // T_INT         = 10,
1449   NONSTATIC_DOUBLE,    // T_LONG        = 11,
1450   NONSTATIC_OOP,       // T_OBJECT      = 12,
1451   NONSTATIC_OOP,       // T_ARRAY       = 13,
1452   NONSTATIC_OOP,       // T_PRIMITIVE_OBJECT = 14,
1453   BAD_ALLOCATION_TYPE, // T_VOID        = 15,
1454   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 16,
1455   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 17,
1456   BAD_ALLOCATION_TYPE, // T_METADATA    = 18,
1457   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1458   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 20,
1459   BAD_ALLOCATION_TYPE, // 0
1460   BAD_ALLOCATION_TYPE, // 1
1461   BAD_ALLOCATION_TYPE, // 2
1462   BAD_ALLOCATION_TYPE, // 3
1463   STATIC_BYTE ,        // T_BOOLEAN     =  4,
1464   STATIC_SHORT,        // T_CHAR        =  5,
1465   STATIC_WORD,         // T_FLOAT       =  6,
1466   STATIC_DOUBLE,       // T_DOUBLE      =  7,
1467   STATIC_BYTE,         // T_BYTE        =  8,
1468   STATIC_SHORT,        // T_SHORT       =  9,
1469   STATIC_WORD,         // T_INT         = 10,
1470   STATIC_DOUBLE,       // T_LONG        = 11,
1471   STATIC_OOP,          // T_OBJECT      = 12,
1472   STATIC_OOP,          // T_ARRAY       = 13,
1473   STATIC_OOP,          // T_PRIMITIVE_OBJECT = 14,
1474   BAD_ALLOCATION_TYPE, // T_VOID        = 15,
1475   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 16,
1476   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 17,
1477   BAD_ALLOCATION_TYPE, // T_METADATA    = 18,
1478   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1479   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 20
1480 };
1481 
1482 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type, bool is_inline_type) {
1483   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1484   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1485   assert(result != BAD_ALLOCATION_TYPE, "bad type");
1486   if (is_inline_type) {
1487     result = is_static ? STATIC_INLINE : NONSTATIC_INLINE;
1488   }
1489   return result;
1490 }
1491 
1492 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1493  public:
1494   u2 count[MAX_FIELD_ALLOCATION_TYPE];
1495 
1496   FieldAllocationCount() {
1497     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1498       count[i] = 0;
1499     }
1500   }
1501 
1502   void update(bool is_static, BasicType type, bool is_inline_type) {
1503     FieldAllocationType atype = basic_type_to_atype(is_static, type, is_inline_type);
1504     if (atype != BAD_ALLOCATION_TYPE) {
1505       // Make sure there is no overflow with injected fields.
1506       assert(count[atype] < 0xFFFF, "More than 65535 fields");
1507       count[atype]++;
1508     }
1509   }
1510 };
1511 
1512 // Side-effects: populates the _fields, _fields_annotations,
1513 // _fields_type_annotations fields
1514 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1515                                    bool is_interface,
1516                                    bool is_inline_type,
1517                                    bool is_permits_value_class,
1518                                    FieldAllocationCount* const fac,
1519                                    ConstantPool* cp,
1520                                    const int cp_size,
1521                                    u2* const java_fields_count_ptr,
1522                                    TRAPS) {
1523 
1524   assert(cfs != NULL, "invariant");
1525   assert(fac != NULL, "invariant");
1526   assert(cp != NULL, "invariant");
1527   assert(java_fields_count_ptr != NULL, "invariant");
1528 
1529   assert(NULL == _fields, "invariant");
1530   assert(NULL == _fields_annotations, "invariant");
1531   assert(NULL == _fields_type_annotations, "invariant");
1532 
1533   cfs->guarantee_more(2, CHECK);  // length
1534   const u2 length = cfs->get_u2_fast();
1535   *java_fields_count_ptr = length;
1536 
1537   int num_injected = 0;
1538   const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1539                                                                   &num_injected);
1540 
1541   // two more slots are required for inline classes:
1542   // one for the static field with a reference to the pre-allocated default value
1543   // one for the field the JVM injects when detecting an empty inline class
1544   const int total_fields = length + num_injected + (is_inline_type ? 2 : 0);
1545 
1546   // The field array starts with tuples of shorts
1547   // [access, name index, sig index, initial value index, byte offset].
1548   // A generic signature slot only exists for field with generic
1549   // signature attribute. And the access flag is set with
1550   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1551   // signature slots are at the end of the field array and after all
1552   // other fields data.
1553   //
1554   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1555   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1556   //       ...
1557   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1558   //       [generic signature index]
1559   //       [generic signature index]
1560   //       ...
1561   //
1562   // Allocate a temporary resource array for field data. For each field,
1563   // a slot is reserved in the temporary array for the generic signature
1564   // index. After parsing all fields, the data are copied to a permanent
1565   // array and any unused slots will be discarded.
1566   ResourceMark rm(THREAD);
1567   u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1568                                               u2,
1569                                               total_fields * (FieldInfo::field_slots + 1));
1570 
1571   // The generic signature slots start after all other fields' data.
1572   int generic_signature_slot = total_fields * FieldInfo::field_slots;
1573   int num_generic_signature = 0;
1574   int instance_fields_count = 0;
1575   for (int n = 0; n < length; n++) {
1576     // access_flags, name_index, descriptor_index, attributes_count
1577     cfs->guarantee_more(8, CHECK);
1578 
1579     jint recognized_modifiers = JVM_RECOGNIZED_FIELD_MODIFIERS;
1580 
1581     const jint flags = cfs->get_u2_fast() & recognized_modifiers;
1582     verify_legal_field_modifiers(flags, is_interface, is_inline_type, is_permits_value_class, CHECK);
1583     AccessFlags access_flags;


1584     access_flags.set_flags(flags);
1585 
1586     const u2 name_index = cfs->get_u2_fast();
1587     check_property(valid_symbol_at(name_index),
1588       "Invalid constant pool index %u for field name in class file %s",
1589       name_index, CHECK);
1590     const Symbol* const name = cp->symbol_at(name_index);
1591     verify_legal_field_name(name, CHECK);
1592 
1593     const u2 signature_index = cfs->get_u2_fast();
1594     check_property(valid_symbol_at(signature_index),
1595       "Invalid constant pool index %u for field signature in class file %s",
1596       signature_index, CHECK);
1597     const Symbol* const sig = cp->symbol_at(signature_index);
1598     verify_legal_field_signature(name, sig, CHECK);
1599     if (!access_flags.is_static()) instance_fields_count++;
1600 
1601     u2 constantvalue_index = 0;
1602     bool is_synthetic = false;
1603     u2 generic_signature_index = 0;
1604     const bool is_static = access_flags.is_static();
1605     FieldAnnotationCollector parsed_annotations(_loader_data);
1606 
1607     const u2 attributes_count = cfs->get_u2_fast();
1608     if (attributes_count > 0) {
1609       parse_field_attributes(cfs,
1610                              attributes_count,
1611                              is_static,
1612                              signature_index,
1613                              &constantvalue_index,
1614                              &is_synthetic,
1615                              &generic_signature_index,
1616                              &parsed_annotations,
1617                              CHECK);
1618 
1619       if (parsed_annotations.field_annotations() != NULL) {

1639 
1640       if (is_synthetic) {
1641         access_flags.set_is_synthetic();
1642       }
1643       if (generic_signature_index != 0) {
1644         access_flags.set_field_has_generic_signature();
1645         fa[generic_signature_slot] = generic_signature_index;
1646         generic_signature_slot ++;
1647         num_generic_signature ++;
1648       }
1649     }
1650 
1651     FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1652     field->initialize(access_flags.as_short(),
1653                       name_index,
1654                       signature_index,
1655                       constantvalue_index);
1656     const BasicType type = cp->basic_type_for_signature_at(signature_index);
1657 
1658     // Update FieldAllocationCount for this kind of field
1659     fac->update(is_static, type, type == T_PRIMITIVE_OBJECT);
1660 
1661     // After field is initialized with type, we can augment it with aux info
1662     if (parsed_annotations.has_any_annotations()) {
1663       parsed_annotations.apply_to(field);
1664       if (field->is_contended()) {
1665         _has_contended_fields = true;
1666       }
1667     }
1668   }
1669 
1670   int index = length;
1671   if (num_injected != 0) {
1672     for (int n = 0; n < num_injected; n++) {
1673       // Check for duplicates
1674       if (injected[n].may_be_java) {
1675         const Symbol* const name      = injected[n].name();
1676         const Symbol* const signature = injected[n].signature();
1677         bool duplicate = false;
1678         for (int i = 0; i < length; i++) {
1679           const FieldInfo* const f = FieldInfo::from_field_array(fa, i);

1683             duplicate = true;
1684             break;
1685           }
1686         }
1687         if (duplicate) {
1688           // These will be removed from the field array at the end
1689           continue;
1690         }
1691       }
1692 
1693       // Injected field
1694       FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1695       field->initialize((u2)JVM_ACC_FIELD_INTERNAL,
1696                         (u2)(injected[n].name_index),
1697                         (u2)(injected[n].signature_index),
1698                         0);
1699 
1700       const BasicType type = Signature::basic_type(injected[n].signature());
1701 
1702       // Update FieldAllocationCount for this kind of field
1703       fac->update(false, type, false);
1704       index++;
1705     }
1706   }
1707 
1708   if (is_inline_type) {
1709     FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1710     field->initialize(JVM_ACC_FIELD_INTERNAL | JVM_ACC_STATIC,
1711                       (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(default_value_name)),
1712                       (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(object_signature)),
1713                       0);
1714     const BasicType type = Signature::basic_type(vmSymbols::object_signature());
1715     fac->update(true, type, false);
1716     index++;
1717   }
1718 
1719   if (is_inline_type && instance_fields_count == 0) {
1720     _is_empty_inline_type = true;
1721     FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1722     field->initialize(JVM_ACC_FIELD_INTERNAL,
1723         (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(empty_marker_name)),
1724         (u2)vmSymbols::as_int(VM_SYMBOL_ENUM_NAME(byte_signature)),
1725         0);
1726     const BasicType type = Signature::basic_type(vmSymbols::byte_signature());
1727     fac->update(false, type, false);
1728     index++;
1729   }
1730 
1731   if (instance_fields_count > 0) {
1732     _has_nonstatic_fields = true;
1733   }
1734 
1735   assert(NULL == _fields, "invariant");
1736 
1737   _fields =
1738     MetadataFactory::new_array<u2>(_loader_data,
1739                                    index * FieldInfo::field_slots + num_generic_signature,
1740                                    CHECK);
1741   // Sometimes injected fields already exist in the Java source so
1742   // the fields array could be too long.  In that case the
1743   // fields array is trimed. Also unused slots that were reserved
1744   // for generic signature indexes are discarded.
1745   {
1746     int i = 0;
1747     for (; i < index * FieldInfo::field_slots; i++) {
1748       _fields->at_put(i, fa[i]);
1749     }
1750     for (int j = total_fields * FieldInfo::field_slots;
1751          j < generic_signature_slot; j++) {
1752       _fields->at_put(i++, fa[j]);
1753     }
1754     assert(_fields->length() == i, "");

2032         "Exception name has bad type at constant pool %u in class file %s",
2033         checked_exception, CHECK_NULL);
2034     }
2035   }
2036   // check exceptions attribute length
2037   if (_need_verify) {
2038     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2039                                                    sizeof(u2) * size),
2040                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2041   }
2042   return checked_exceptions_start;
2043 }
2044 
2045 void ClassFileParser::throwIllegalSignature(const char* type,
2046                                             const Symbol* name,
2047                                             const Symbol* sig,
2048                                             TRAPS) const {
2049   assert(name != NULL, "invariant");
2050   assert(sig != NULL, "invariant");
2051 
2052   const char* class_note = "";
2053   if (is_inline_type() && name == vmSymbols::object_initializer_name()) {
2054     class_note = " (an inline class)";
2055   }
2056 
2057   ResourceMark rm(THREAD);
2058   Exceptions::fthrow(THREAD_AND_LOCATION,
2059       vmSymbols::java_lang_ClassFormatError(),
2060       "%s \"%s\" in class %s%s has illegal signature \"%s\"", type,
2061       name->as_C_string(), _class_name->as_C_string(), class_note, sig->as_C_string());
2062 }
2063 
2064 AnnotationCollector::ID
2065 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2066                                       const Symbol* name,
2067                                       const bool can_access_vm_annotations) {
2068   const vmSymbolID sid = vmSymbols::find_sid(name);
2069   // Privileged code can use all annotations.  Other code silently drops some.
2070   const bool privileged = loader_data->is_boot_class_loader_data() ||
2071                           loader_data->is_platform_class_loader_data() ||
2072                           can_access_vm_annotations;
2073   switch (sid) {
2074     case VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2075       if (_location != _in_method)  break;  // only allow for methods
2076       if (!privileged)              break;  // only allow in privileged code
2077       return _method_CallerSensitive;
2078     }
2079     case VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2080       if (_location != _in_method)  break;  // only allow for methods
2081       if (!privileged)              break;  // only allow in privileged code

2330                              runtime_visible_type_annotations_length,
2331                              runtime_invisible_type_annotations,
2332                              runtime_invisible_type_annotations_length,
2333                              CHECK);
2334     cm->set_type_annotations(a);
2335   }
2336 }
2337 
2338 
2339 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2340 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2341 // Method* to save footprint, so we only know the size of the resulting Method* when the
2342 // entire method attribute is parsed.
2343 //
2344 // The promoted_flags parameter is used to pass relevant access_flags
2345 // from the method back up to the containing klass. These flag values
2346 // are added to klass's access_flags.
2347 
2348 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2349                                       bool is_interface,
2350                                       bool is_inline_type,
2351                                       bool is_permits_value_class,
2352                                       const ConstantPool* cp,
2353                                       AccessFlags* const promoted_flags,
2354                                       TRAPS) {
2355   assert(cfs != NULL, "invariant");
2356   assert(cp != NULL, "invariant");
2357   assert(promoted_flags != NULL, "invariant");
2358 
2359   ResourceMark rm(THREAD);
2360   // Parse fixed parts:
2361   // access_flags, name_index, descriptor_index, attributes_count
2362   cfs->guarantee_more(8, CHECK_NULL);
2363 
2364   int flags = cfs->get_u2_fast();
2365   const u2 name_index = cfs->get_u2_fast();
2366   const int cp_size = cp->length();
2367   check_property(
2368     valid_symbol_at(name_index),
2369     "Illegal constant pool index %u for method name in class file %s",
2370     name_index, CHECK_NULL);
2371   const Symbol* const name = cp->symbol_at(name_index);

2373 
2374   const u2 signature_index = cfs->get_u2_fast();
2375   guarantee_property(
2376     valid_symbol_at(signature_index),
2377     "Illegal constant pool index %u for method signature in class file %s",
2378     signature_index, CHECK_NULL);
2379   const Symbol* const signature = cp->symbol_at(signature_index);
2380 
2381   if (name == vmSymbols::class_initializer_name()) {
2382     // We ignore the other access flags for a valid class initializer.
2383     // (JVM Spec 2nd ed., chapter 4.6)
2384     if (_major_version < 51) { // backward compatibility
2385       flags = JVM_ACC_STATIC;
2386     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2387       flags &= JVM_ACC_STATIC | (_major_version <= JAVA_16_VERSION ? JVM_ACC_STRICT : 0);
2388     } else {
2389       classfile_parse_error("Method <clinit> is not static in class file %s", THREAD);
2390       return NULL;
2391     }
2392   } else {
2393     verify_legal_method_modifiers(flags, is_interface, is_inline_type, is_permits_value_class, name, CHECK_NULL);
2394   }
2395 
2396   if (name == vmSymbols::object_initializer_name()) {
2397     if (is_interface) {
2398       classfile_parse_error("Interface cannot have a method named <init>, class file %s", THREAD);
2399       return NULL;
2400     } else if (!is_inline_type && signature->is_void_method_signature()) {
2401       // OK, a constructor
2402     } else if (is_inline_type && !signature->is_void_method_signature()) {
2403       // also OK, a static factory, as long as the return value is good
2404       bool ok = false;
2405       SignatureStream ss((Symbol*) signature, true);
2406       while (!ss.at_return_type())  ss.next();
2407       if (ss.is_reference()) {
2408         Symbol* ret = ss.as_symbol();
2409         const Symbol* required = class_name();
2410         if (is_hidden()) {
2411           // The original class name in hidden classes gets changed.  So using
2412           // the original name in the return type is no longer valid.
2413           // Note that expecting the return type for inline hidden class factory
2414           // methods to be java.lang.Object works around a JVM Spec issue for
2415           // hidden classes.
2416           required = vmSymbols::java_lang_Object();
2417         }
2418         ok = (ret == required);
2419       }
2420       if (!ok) {
2421         throwIllegalSignature("Method", name, signature, CHECK_0);
2422       }
2423     } else {
2424       // not OK, so throw the same error as in verify_legal_method_signature.
2425       throwIllegalSignature("Method", name, signature, CHECK_0);
2426     }
2427     // A declared <init> method must always be either a non-static
2428     // object constructor, with a void return, or else it must be a
2429     // static factory method, with a non-void return.  No other
2430     // definition of <init> is possible.
2431     //
2432     // The verifier (in verify_invoke_instructions) will inspect the
2433     // signature of any attempt to invoke <init>, and ensures that it
2434     // returns non-void if and only if it is being invoked by
2435     // invokestatic, and void if and only if it is being invoked by
2436     // invokespecial.
2437     //
2438     // When a symbolic reference to <init> is resolved for a
2439     // particular invocation mode (special or static), the mode is
2440     // matched to the JVM_ACC_STATIC modifier of the <init> method.
2441     // Thus, it is impossible to statically invoke a constructor, and
2442     // impossible to "new + invokespecial" a static factory, either
2443     // through bytecode or through reflection.
2444   }
2445 
2446   int args_size = -1;  // only used when _need_verify is true
2447   if (_need_verify) {
2448     verify_legal_name_with_signature(name, signature, CHECK_NULL);
2449     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2450                  verify_legal_method_signature(name, signature, CHECK_NULL);
2451     if (args_size > MAX_ARGS_SIZE) {
2452       classfile_parse_error("Too many arguments in method signature in class file %s", THREAD);
2453       return NULL;
2454     }
2455   }
2456 
2457   AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2458 
2459   // Default values for code and exceptions attribute elements
2460   u2 max_stack = 0;
2461   u2 max_locals = 0;
2462   u4 code_length = 0;
2463   const u1* code_start = 0;

2993       _has_finalizer = true;
2994     }
2995   }
2996   if (name == vmSymbols::object_initializer_name() &&
2997       signature == vmSymbols::void_method_signature() &&
2998       m->is_vanilla_constructor()) {
2999     _has_vanilla_constructor = true;
3000   }
3001 
3002   NOT_PRODUCT(m->verify());
3003   return m;
3004 }
3005 
3006 
3007 // The promoted_flags parameter is used to pass relevant access_flags
3008 // from the methods back up to the containing klass. These flag values
3009 // are added to klass's access_flags.
3010 // Side-effects: populates the _methods field in the parser
3011 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
3012                                     bool is_interface,
3013                                     bool is_inline_type,
3014                                     bool is_permits_value_class,
3015                                     AccessFlags* promoted_flags,
3016                                     bool* has_final_method,
3017                                     bool* declares_nonstatic_concrete_methods,
3018                                     TRAPS) {
3019   assert(cfs != NULL, "invariant");
3020   assert(promoted_flags != NULL, "invariant");
3021   assert(has_final_method != NULL, "invariant");
3022   assert(declares_nonstatic_concrete_methods != NULL, "invariant");
3023 
3024   assert(NULL == _methods, "invariant");
3025 
3026   cfs->guarantee_more(2, CHECK);  // length
3027   const u2 length = cfs->get_u2_fast();
3028   if (length == 0) {
3029     _methods = Universe::the_empty_method_array();
3030   } else {
3031     _methods = MetadataFactory::new_array<Method*>(_loader_data,
3032                                                    length,
3033                                                    NULL,
3034                                                    CHECK);
3035 
3036     for (int index = 0; index < length; index++) {
3037       Method* method = parse_method(cfs,
3038                                     is_interface,
3039                                     is_inline_type,
3040                                     is_permits_value_class,
3041                                     _cp,
3042                                     promoted_flags,
3043                                     CHECK);
3044 
3045       if (method->is_final()) {
3046         *has_final_method = true;
3047       }
3048       // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3049       // used for interface initialization, and default method inheritance analysis
3050       if (is_interface && !(*declares_nonstatic_concrete_methods)
3051         && !method->is_abstract() && !method->is_static()) {
3052         *declares_nonstatic_concrete_methods = true;
3053       }
3054       _methods->at_put(index, method);
3055     }
3056 
3057     if (_need_verify && length > 1) {
3058       // Check duplicated methods
3059       ResourceMark rm(THREAD);
3060       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(

3297         valid_klass_reference_at(outer_class_info_index),
3298       "outer_class_info_index %u has bad constant type in class file %s",
3299       outer_class_info_index, CHECK_0);
3300 
3301     if (outer_class_info_index != 0) {
3302       const Symbol* const outer_class_name = cp->klass_name_at(outer_class_info_index);
3303       char* bytes = (char*)outer_class_name->bytes();
3304       guarantee_property(bytes[0] != JVM_SIGNATURE_ARRAY,
3305                          "Outer class is an array class in class file %s", CHECK_0);
3306     }
3307     // Inner class name
3308     const u2 inner_name_index = cfs->get_u2_fast();
3309     check_property(
3310       inner_name_index == 0 || valid_symbol_at(inner_name_index),
3311       "inner_name_index %u has bad constant type in class file %s",
3312       inner_name_index, CHECK_0);
3313     if (_need_verify) {
3314       guarantee_property(inner_class_info_index != outer_class_info_index,
3315                          "Class is both outer and inner class in class file %s", CHECK_0);
3316     }
3317 
3318     jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3319     // JVM_ACC_MODULE is defined in JDK-9 and later.
3320     if (_major_version >= JAVA_9_VERSION) {
3321       recognized_modifiers |= JVM_ACC_MODULE;
3322     }
3323     // JVM_ACC_VALUE, JVM_ACC_PRIMITIVE, and JVM_ACC_PERMITS_VALUE are defined for class file version 62 and later
3324     if (supports_inline_types()) {
3325       recognized_modifiers |= JVM_ACC_PRIMITIVE | JVM_ACC_VALUE | JVM_ACC_PERMITS_VALUE;
3326     }
3327 
3328     // Access flags
3329     jint flags = cfs->get_u2_fast() & recognized_modifiers;
3330 
3331     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3332       // Set abstract bit for old class files for backward compatibility
3333       flags |= JVM_ACC_ABSTRACT;
3334     }
3335     verify_legal_class_modifiers(flags, CHECK_0);
3336     AccessFlags inner_access_flags(flags);
3337 
3338     inner_classes->at_put(index++, inner_class_info_index);
3339     inner_classes->at_put(index++, outer_class_info_index);
3340     inner_classes->at_put(index++, inner_name_index);
3341     inner_classes->at_put(index++, inner_access_flags.as_short());
3342   }
3343 
3344   // Check for circular and duplicate entries.
3345   bool has_circularity = false;
3346   if (_need_verify) {
3347     has_circularity = check_inner_classes_circularity(cp, length * 4, CHECK_0);
3348     if (has_circularity) {
3349       // If circularity check failed then ignore InnerClasses attribute.
3350       MetadataFactory::free_array<u2>(_loader_data, _inner_classes);

3419   if (length > 0) {
3420     int index = 0;
3421     cfs->guarantee_more(2 * length, CHECK_0);
3422     for (int n = 0; n < length; n++) {
3423       const u2 class_info_index = cfs->get_u2_fast();
3424       check_property(
3425         valid_klass_reference_at(class_info_index),
3426         "Permitted subclass class_info_index %u has bad constant type in class file %s",
3427         class_info_index, CHECK_0);
3428       permitted_subclasses->at_put(index++, class_info_index);
3429     }
3430     assert(index == size, "wrong size");
3431   }
3432 
3433   // Restore buffer's current position.
3434   cfs->set_current(current_mark);
3435 
3436   return length;
3437 }
3438 
3439 u2 ClassFileParser::parse_classfile_preload_attribute(const ClassFileStream* const cfs,
3440                                                                    const u1* const preload_attribute_start,
3441                                                                    TRAPS) {
3442   const u1* const current_mark = cfs->current();
3443   u2 length = 0;
3444   if (preload_attribute_start != NULL) {
3445     cfs->set_current(preload_attribute_start);
3446     cfs->guarantee_more(2, CHECK_0);  // length
3447     length = cfs->get_u2_fast();
3448   }
3449   const int size = length;
3450   Array<u2>* const preload_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3451   _preload_classes = preload_classes;
3452   if (length > 0) {
3453     int index = 0;
3454     cfs->guarantee_more(2 * length, CHECK_0);
3455     for (int n = 0; n < length; n++) {
3456       const u2 class_info_index = cfs->get_u2_fast();
3457       check_property(
3458         valid_klass_reference_at(class_info_index),
3459         "Preload class_info_index %u has bad constant type in class file %s",
3460         class_info_index, CHECK_0);
3461       preload_classes->at_put(index++, class_info_index);
3462     }
3463     assert(index == size, "wrong size");
3464   }
3465 
3466   // Restore buffer's current position.
3467   cfs->set_current(current_mark);
3468 
3469   return length;
3470 }
3471 
3472 //  Record {
3473 //    u2 attribute_name_index;
3474 //    u4 attribute_length;
3475 //    u2 components_count;
3476 //    component_info components[components_count];
3477 //  }
3478 //  component_info {
3479 //    u2 name_index;
3480 //    u2 descriptor_index
3481 //    u2 attributes_count;
3482 //    attribute_info_attributes[attributes_count];
3483 //  }
3484 u2 ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3485                                                      const ConstantPool* cp,
3486                                                      const u1* const record_attribute_start,
3487                                                      TRAPS) {
3488   const u1* const current_mark = cfs->current();
3489   int components_count = 0;
3490   unsigned int calculate_attr_size = 0;
3491   if (record_attribute_start != NULL) {

3736   }
3737   guarantee_property(current_start + attribute_byte_length == cfs->current(),
3738                      "Bad length on BootstrapMethods in class file %s",
3739                      CHECK);
3740 }
3741 
3742 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3743                                                  ConstantPool* cp,
3744                  ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3745                                                  TRAPS) {
3746   assert(cfs != NULL, "invariant");
3747   assert(cp != NULL, "invariant");
3748   assert(parsed_annotations != NULL, "invariant");
3749 
3750   // Set inner classes attribute to default sentinel
3751   _inner_classes = Universe::the_empty_short_array();
3752   // Set nest members attribute to default sentinel
3753   _nest_members = Universe::the_empty_short_array();
3754   // Set _permitted_subclasses attribute to default sentinel
3755   _permitted_subclasses = Universe::the_empty_short_array();
3756   // Set _preload_classes attribute to default sentinel
3757   _preload_classes = Universe::the_empty_short_array();
3758   cfs->guarantee_more(2, CHECK);  // attributes_count
3759   u2 attributes_count = cfs->get_u2_fast();
3760   bool parsed_sourcefile_attribute = false;
3761   bool parsed_innerclasses_attribute = false;
3762   bool parsed_nest_members_attribute = false;
3763   bool parsed_permitted_subclasses_attribute = false;
3764   bool parsed_preload_attribute = false;
3765   bool parsed_nest_host_attribute = false;
3766   bool parsed_record_attribute = false;
3767   bool parsed_enclosingmethod_attribute = false;
3768   bool parsed_bootstrap_methods_attribute = false;
3769   const u1* runtime_visible_annotations = NULL;
3770   int runtime_visible_annotations_length = 0;
3771   const u1* runtime_invisible_annotations = NULL;
3772   int runtime_invisible_annotations_length = 0;
3773   const u1* runtime_visible_type_annotations = NULL;
3774   int runtime_visible_type_annotations_length = 0;
3775   const u1* runtime_invisible_type_annotations = NULL;
3776   int runtime_invisible_type_annotations_length = 0;
3777   bool runtime_invisible_type_annotations_exists = false;
3778   bool runtime_invisible_annotations_exists = false;
3779   bool parsed_source_debug_ext_annotations_exist = false;
3780   const u1* inner_classes_attribute_start = NULL;
3781   u4  inner_classes_attribute_length = 0;
3782   u2  enclosing_method_class_index = 0;
3783   u2  enclosing_method_method_index = 0;
3784   const u1* nest_members_attribute_start = NULL;
3785   u4  nest_members_attribute_length = 0;
3786   const u1* record_attribute_start = NULL;
3787   u4  record_attribute_length = 0;
3788   const u1* permitted_subclasses_attribute_start = NULL;
3789   u4  permitted_subclasses_attribute_length = 0;
3790   const u1* preload_attribute_start = NULL;
3791   u4  preload_attribute_length = 0;
3792 
3793   // Iterate over attributes
3794   while (attributes_count--) {
3795     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
3796     const u2 attribute_name_index = cfs->get_u2_fast();
3797     const u4 attribute_length = cfs->get_u4_fast();
3798     check_property(
3799       valid_symbol_at(attribute_name_index),
3800       "Attribute name has bad constant pool index %u in class file %s",
3801       attribute_name_index, CHECK);
3802     const Symbol* const tag = cp->symbol_at(attribute_name_index);
3803     if (tag == vmSymbols::tag_source_file()) {
3804       // Check for SourceFile tag
3805       if (_need_verify) {
3806         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3807       }
3808       if (parsed_sourcefile_attribute) {
3809         classfile_parse_error("Multiple SourceFile attributes in class file %s", THREAD);
3810         return;
3811       } else {

3998               return;
3999             }
4000             parsed_record_attribute = true;
4001             record_attribute_start = cfs->current();
4002             record_attribute_length = attribute_length;
4003           } else if (_major_version >= JAVA_17_VERSION) {
4004             if (tag == vmSymbols::tag_permitted_subclasses()) {
4005               if (parsed_permitted_subclasses_attribute) {
4006                 classfile_parse_error("Multiple PermittedSubclasses attributes in class file %s", CHECK);
4007                 return;
4008               }
4009               // Classes marked ACC_FINAL cannot have a PermittedSubclasses attribute.
4010               if (_access_flags.is_final()) {
4011                 classfile_parse_error("PermittedSubclasses attribute in final class file %s", CHECK);
4012                 return;
4013               }
4014               parsed_permitted_subclasses_attribute = true;
4015               permitted_subclasses_attribute_start = cfs->current();
4016               permitted_subclasses_attribute_length = attribute_length;
4017             }
4018             if (EnableValhalla && tag == vmSymbols::tag_preload()) {
4019               if (parsed_preload_attribute) {
4020                 classfile_parse_error("Multiple Preload attributes in class file %s", CHECK);
4021                 return;
4022               }
4023               parsed_preload_attribute = true;
4024               preload_attribute_start = cfs->current();
4025               preload_attribute_length = attribute_length;
4026             }
4027           }
4028           // Skip attribute_length for any attribute where major_verson >= JAVA_17_VERSION
4029           cfs->skip_u1(attribute_length, CHECK);
4030         } else {
4031           // Unknown attribute
4032           cfs->skip_u1(attribute_length, CHECK);
4033         }
4034       } else {
4035         // Unknown attribute
4036         cfs->skip_u1(attribute_length, CHECK);
4037       }
4038     } else {
4039       // Unknown attribute
4040       cfs->skip_u1(attribute_length, CHECK);
4041     }
4042   }
4043   _class_annotations = assemble_annotations(runtime_visible_annotations,
4044                                             runtime_visible_annotations_length,
4045                                             runtime_invisible_annotations,
4046                                             runtime_invisible_annotations_length,

4087                             CHECK);
4088     if (_need_verify) {
4089       guarantee_property(record_attribute_length == calculated_attr_length,
4090                          "Record attribute has wrong length in class file %s",
4091                          CHECK);
4092     }
4093   }
4094 
4095   if (parsed_permitted_subclasses_attribute) {
4096     const u2 num_subclasses = parse_classfile_permitted_subclasses_attribute(
4097                             cfs,
4098                             permitted_subclasses_attribute_start,
4099                             CHECK);
4100     if (_need_verify) {
4101       guarantee_property(
4102         permitted_subclasses_attribute_length == sizeof(num_subclasses) + sizeof(u2) * num_subclasses,
4103         "Wrong PermittedSubclasses attribute length in class file %s", CHECK);
4104     }
4105   }
4106 
4107   if (parsed_preload_attribute) {
4108     const u2 num_classes = parse_classfile_preload_attribute(
4109                             cfs,
4110                             preload_attribute_start,
4111                             CHECK);
4112     if (_need_verify) {
4113       guarantee_property(
4114         preload_attribute_length == sizeof(num_classes) + sizeof(u2) * num_classes,
4115         "Wrong Preload attribute length in class file %s", CHECK);
4116     }
4117   }
4118 
4119   if (_max_bootstrap_specifier_index >= 0) {
4120     guarantee_property(parsed_bootstrap_methods_attribute,
4121                        "Missing BootstrapMethods attribute in class file %s", CHECK);
4122   }
4123 }
4124 
4125 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
4126   assert(k != NULL, "invariant");
4127 
4128   if (_synthetic_flag)
4129     k->set_is_synthetic();
4130   if (_sourcefile_index != 0) {
4131     k->set_source_file_name_index(_sourcefile_index);
4132   }
4133   if (_generic_signature_index != 0) {
4134     k->set_generic_signature_index(_generic_signature_index);
4135   }
4136   if (_sde_buffer != NULL) {
4137     k->set_source_debug_extension(_sde_buffer, _sde_length);
4138   }

4163     // _combined_annotations so these fields can now be cleared.
4164     _class_annotations       = NULL;
4165     _class_type_annotations  = NULL;
4166     _fields_annotations      = NULL;
4167     _fields_type_annotations = NULL;
4168 }
4169 
4170 // Transfer ownership of metadata allocated to the InstanceKlass.
4171 void ClassFileParser::apply_parsed_class_metadata(
4172                                             InstanceKlass* this_klass,
4173                                             int java_fields_count) {
4174   assert(this_klass != NULL, "invariant");
4175 
4176   _cp->set_pool_holder(this_klass);
4177   this_klass->set_constants(_cp);
4178   this_klass->set_fields(_fields, java_fields_count);
4179   this_klass->set_methods(_methods);
4180   this_klass->set_inner_classes(_inner_classes);
4181   this_klass->set_nest_members(_nest_members);
4182   this_klass->set_nest_host_index(_nest_host);
4183   this_klass->set_preload_classes(_preload_classes);
4184   this_klass->set_annotations(_combined_annotations);
4185   this_klass->set_permitted_subclasses(_permitted_subclasses);
4186   this_klass->set_record_components(_record_components);
4187   // Delay the setting of _local_interfaces and _transitive_interfaces until after
4188   // initialize_supers() in fill_instance_klass(). It is because the _local_interfaces could
4189   // be shared with _transitive_interfaces and _transitive_interfaces may be shared with
4190   // its _super. If an OOM occurs while loading the current klass, its _super field
4191   // may not have been set. When GC tries to free the klass, the _transitive_interfaces
4192   // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
4193   // dereferences to the deallocated _transitive_interfaces will result in a crash.
4194 
4195   // Clear out these fields so they don't get deallocated by the destructor
4196   clear_class_metadata();
4197 }
4198 
4199 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
4200                                                        int runtime_visible_annotations_length,
4201                                                        const u1* const runtime_invisible_annotations,
4202                                                        int runtime_invisible_annotations_length,
4203                                                        TRAPS) {

4215     }
4216     if (runtime_invisible_annotations != NULL) {
4217       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
4218         int append = runtime_visible_annotations_length+i;
4219         annotations->at_put(append, runtime_invisible_annotations[i]);
4220       }
4221     }
4222   }
4223   return annotations;
4224 }
4225 
4226 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
4227                                                         const int super_class_index,
4228                                                         const bool need_verify,
4229                                                         TRAPS) {
4230   assert(cp != NULL, "invariant");
4231   const InstanceKlass* super_klass = NULL;
4232 
4233   if (super_class_index == 0) {
4234     check_property(_class_name == vmSymbols::java_lang_Object(),
4235                    "Invalid superclass index 0 in class file %s",

4236                    CHECK_NULL);
4237   } else {
4238     check_property(valid_klass_reference_at(super_class_index),
4239                    "Invalid superclass index %u in class file %s",
4240                    super_class_index,
4241                    CHECK_NULL);
4242     // The class name should be legal because it is checked when parsing constant pool.
4243     // However, make sure it is not an array type.
4244     bool is_array = false;
4245     if (cp->tag_at(super_class_index).is_klass()) {
4246       super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
4247       if (need_verify)
4248         is_array = super_klass->is_array_klass();
4249     } else if (need_verify) {
4250       is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
4251     }
4252     if (need_verify) {
4253       guarantee_property(!is_array,
4254                         "Bad superclass name in class file %s", CHECK_NULL);
4255     }

4356 }
4357 
4358 void OopMapBlocksBuilder::print_on(outputStream* st) const {
4359   st->print_cr("  OopMapBlocks: %3d  /%3d", _nonstatic_oop_map_count, _max_nonstatic_oop_maps);
4360   if (_nonstatic_oop_map_count > 0) {
4361     OopMapBlock* map = _nonstatic_oop_maps;
4362     OopMapBlock* last_map = last_oop_map();
4363     assert(map <= last_map, "Last less than first");
4364     while (map <= last_map) {
4365       st->print_cr("    Offset: %3d  -%3d Count: %3d", map->offset(),
4366                    map->offset() + map->offset_span() - heapOopSize, map->count());
4367       map++;
4368     }
4369   }
4370 }
4371 
4372 void OopMapBlocksBuilder::print_value_on(outputStream* st) const {
4373   print_on(st);
4374 }
4375 
4376 void ClassFileParser::throwInlineTypeLimitation(THREAD_AND_LOCATION_DECL,
4377                                                 const char* msg,
4378                                                 const Symbol* name,
4379                                                 const Symbol* sig) const {
4380 
4381   ResourceMark rm(THREAD);
4382   if (name == NULL || sig == NULL) {
4383     Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4384         vmSymbols::java_lang_ClassFormatError(),
4385         "class: %s - %s", _class_name->as_C_string(), msg);
4386   }
4387   else {
4388     Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4389         vmSymbols::java_lang_ClassFormatError(),
4390         "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
4391         _class_name->as_C_string(), msg);
4392   }
4393 }
4394 
4395 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4396   assert(ik != NULL, "invariant");
4397 
4398   const Klass* const super = ik->super();
4399 
4400   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4401   // in which case we don't have to register objects as finalizable
4402   if (!_has_empty_finalizer) {
4403     if (_has_finalizer ||
4404         (super != NULL && super->has_finalizer())) {
4405       ik->set_has_finalizer();
4406     }
4407   }
4408 
4409 #ifdef ASSERT
4410   bool f = false;
4411   const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4412                                            vmSymbols::void_method_signature());
4413   if (InstanceKlass::is_finalization_enabled() &&
4414       (m != NULL) && !m->is_empty_method()) {
4415       f = true;
4416   }
4417 
4418   // Spec doesn't prevent agent from redefinition of empty finalizer.
4419   // Despite the fact that it's generally bad idea and redefined finalizer
4420   // will not work as expected we shouldn't abort vm in this case
4421   if (!ik->has_redefined_this_or_super()) {
4422     assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4423   }
4424 #endif
4425 
4426   // Check if this klass supports the java.lang.Cloneable interface
4427   if (vmClasses::Cloneable_klass_loaded()) {
4428     if (ik->is_subtype_of(vmClasses::Cloneable_klass())) {
4429       if (ik->is_inline_klass()) {
4430         JavaThread *THREAD = JavaThread::current();
4431         throwInlineTypeLimitation(THREAD_AND_LOCATION, "Inline Types do not support Cloneable");
4432         return;
4433       }
4434       ik->set_is_cloneable();
4435     }
4436   }
4437 
4438   // Check if this klass has a vanilla default constructor
4439   if (super == NULL) {
4440     // java.lang.Object has empty default constructor
4441     ik->set_has_vanilla_constructor();
4442   } else {
4443     if (super->has_vanilla_constructor() &&
4444         _has_vanilla_constructor) {
4445       ik->set_has_vanilla_constructor();
4446     }
4447 #ifdef ASSERT
4448     bool v = false;
4449     if (super->has_vanilla_constructor()) {
4450       const Method* const constructor =
4451         ik->find_method(vmSymbols::object_initializer_name(),
4452                        vmSymbols::void_method_signature());
4453       if (constructor != NULL && constructor->is_vanilla_constructor()) {
4454         v = true;
4455       }
4456     }
4457     assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4458 #endif
4459   }
4460 
4461   // If it cannot be fast-path allocated, set a bit in the layout helper.
4462   // See documentation of InstanceKlass::can_be_fastpath_allocated().
4463   assert(ik->size_helper() > 0, "layout_helper is initialized");
4464   if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4465       || ik->is_abstract() || ik->is_interface()
4466       || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4467       || ik->size_helper() >= FastAllocateSizeLimit) {
4468     // Forbid fast-path allocation.
4469     const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4470     ik->set_layout_helper(lh);
4471   }
4472 }
4473 
4474 bool ClassFileParser::supports_inline_types() const {
4475   // Inline types are only supported by class file version 55 and later
4476   return _major_version >= JAVA_11_VERSION;
4477 }
4478 
4479 // utility methods for appending an array with check for duplicates
4480 
4481 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4482                               const Array<InstanceKlass*>* const ifs) {
4483   // iterate over new interfaces
4484   for (int i = 0; i < ifs->length(); i++) {
4485     InstanceKlass* const e = ifs->at(i);
4486     assert(e->is_klass() && e->is_interface(), "just checking");
4487     // add new interface
4488     result->append_if_missing(e);
4489   }
4490 }
4491 
4492 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4493                                                             Array<InstanceKlass*>* local_ifs,
4494                                                             ClassLoaderData* loader_data,
4495                                                             TRAPS) {
4496   assert(local_ifs != NULL, "invariant");
4497   assert(loader_data != NULL, "invariant");
4498 

4502   // Add superclass transitive interfaces size
4503   if (super != NULL) {
4504     super_size = super->transitive_interfaces()->length();
4505     max_transitive_size += super_size;
4506   }
4507   // Add local interfaces' super interfaces
4508   const int local_size = local_ifs->length();
4509   for (int i = 0; i < local_size; i++) {
4510     InstanceKlass* const l = local_ifs->at(i);
4511     max_transitive_size += l->transitive_interfaces()->length();
4512   }
4513   // Finally add local interfaces
4514   max_transitive_size += local_size;
4515   // Construct array
4516   if (max_transitive_size == 0) {
4517     // no interfaces, use canonicalized array
4518     return Universe::the_empty_instance_klass_array();
4519   } else if (max_transitive_size == super_size) {
4520     // no new local interfaces added, share superklass' transitive interface array
4521     return super->transitive_interfaces();
4522     // The three lines below are commented to work around bug JDK-8245487
4523 //  } else if (max_transitive_size == local_size) {
4524 //    // only local interfaces added, share local interface array
4525 //    return local_ifs;
4526   } else {
4527     ResourceMark rm;
4528     GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4529 
4530     // Copy down from superclass
4531     if (super != NULL) {
4532       append_interfaces(result, super->transitive_interfaces());
4533     }
4534 
4535     // Copy down from local interfaces' superinterfaces
4536     for (int i = 0; i < local_size; i++) {
4537       InstanceKlass* const l = local_ifs->at(i);
4538       append_interfaces(result, l->transitive_interfaces());
4539     }
4540     // Finally add local interfaces
4541     append_interfaces(result, local_ifs);
4542 
4543     // length will be less than the max_transitive_size if duplicates were removed
4544     const int length = result->length();
4545     assert(length <= max_transitive_size, "just checking");
4546 
4547     Array<InstanceKlass*>* const new_result =
4548       MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4549     for (int i = 0; i < length; i++) {
4550       InstanceKlass* const e = result->at(i);
4551       assert(e != NULL, "just checking");
4552       new_result->at_put(i, e);
4553     }
4554     return new_result;
4555   }
4556 }
4557 
4558 void ClassFileParser::check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4559   assert(this_klass != NULL, "invariant");
4560   const Klass* const super = this_klass->super();
4561 
4562   if (super != NULL) {
4563     const InstanceKlass* super_ik = InstanceKlass::cast(super);
4564 
4565     if (super->is_final()) {
4566       classfile_icce_error("class %s cannot inherit from final class %s", super_ik, THREAD);
4567       return;
4568     }
4569 
4570     if (super_ik->is_sealed() && !super_ik->has_as_permitted_subclass(this_klass)) {
4571       classfile_icce_error("class %s cannot inherit from sealed class %s", super_ik, THREAD);
4572       return;
4573     }
4574 
4575     // The JVMS says that super classes for value types must have the ACC_PERMITS_VALUE
4576     // flag set.  However, since java.lang.Object has not yet been changed into an abstract
4577     // class, it cannot have its ACC_PERMITS_VALUE flag set.  But, java.lang.Object must
4578     // still be allowed to be a direct super class for a value classes.  So, it is treated
4579     // as a special case for now.
4580     if (this_klass->access_flags().is_value_class() &&
4581         super_ik->name() != vmSymbols::java_lang_Object() &&
4582         super_ik->is_identity_class()) {
4583       classfile_icce_error("value class %s cannot inherit from class %s", super_ik, THREAD);
4584       return;
4585     }
4586 
4587     // If the loader is not the boot loader then throw an exception if its
4588     // superclass is in package jdk.internal.reflect and its loader is not a
4589     // special reflection class loader
4590     if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4591       PackageEntry* super_package = super->package();
4592       if (super_package != NULL &&
4593           super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4594           !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4595         ResourceMark rm(THREAD);
4596         Exceptions::fthrow(
4597           THREAD_AND_LOCATION,
4598           vmSymbols::java_lang_IllegalAccessError(),
4599           "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4600           this_klass->external_name(),
4601           this_klass->class_loader_data()->loader_name_and_id(),
4602           super->external_name());
4603         return;
4604       }
4605     }
4606 

4752     const Method* const m = methods->at(index);
4753     // if m is static and not the init method, throw a verify error
4754     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4755       ResourceMark rm(THREAD);
4756       Exceptions::fthrow(
4757         THREAD_AND_LOCATION,
4758         vmSymbols::java_lang_VerifyError(),
4759         "Illegal static method %s in interface %s",
4760         m->name()->as_C_string(),
4761         this_klass->external_name()
4762       );
4763       return;
4764     }
4765   }
4766 }
4767 
4768 // utility methods for format checking
4769 
4770 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4771   const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4772   const bool is_value_class = (flags & JVM_ACC_VALUE) != 0;
4773   const bool is_primitive_class = (flags & JVM_ACC_PRIMITIVE) != 0;
4774   const bool is_permits_value_class = (flags & JVM_ACC_PERMITS_VALUE) != 0;
4775   assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4776   assert(supports_inline_types() || !is_value_class, "JVM_ACC_VALUE should not be set");
4777   assert(supports_inline_types() || !is_primitive_class, "JVM_ACC_PRIMITIVE should not be set");
4778   assert(supports_inline_types() || !is_permits_value_class, "JVM_ACC_PERMITS_VALUE should not be set");
4779   if (is_module) {
4780     ResourceMark rm(THREAD);
4781     Exceptions::fthrow(
4782       THREAD_AND_LOCATION,
4783       vmSymbols::java_lang_NoClassDefFoundError(),
4784       "%s is not a class because access_flag ACC_MODULE is set",
4785       _class_name->as_C_string());
4786     return;
4787   }
4788 
4789   if (!EnableValhalla) {
4790     if (is_value_class || is_primitive_class) {
4791       const char* bad_flag = is_primitive_class ? "ACC_PRIMITIVE" : "ACC_VALUE";
4792       ResourceMark rm(THREAD);
4793       Exceptions::fthrow(
4794         THREAD_AND_LOCATION,
4795         vmSymbols::java_lang_ClassFormatError(),
4796         "Class modifier %s in class %s requires option -XX:+EnableValhalla",
4797         bad_flag, _class_name->as_C_string()
4798       );
4799     }
4800     return;
4801   }
4802 
4803   if (!_need_verify) { return; }
4804 
4805   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
4806   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
4807   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
4808   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
4809   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
4810   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4811   const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4812 
4813   if ((is_abstract && is_final) ||
4814       (is_interface && !is_abstract) ||
4815       (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4816       (!is_interface && major_gte_1_5 && is_annotation) ||
4817       (is_value_class && (is_enum || is_permits_value_class)) ||
4818       (is_permits_value_class && (is_interface || is_final || !is_abstract)) ||
4819       (is_primitive_class && (!is_value_class || !is_final || is_interface || is_abstract))) {
4820     ResourceMark rm(THREAD);
4821     const char* class_note = "";
4822     if (is_value_class)  class_note = " (a value class)";
4823     if (is_primitive_class)  class_note = " (a primitive class)";
4824     if (is_permits_value_class)  class_note = " (a permits_value class)";
4825     Exceptions::fthrow(
4826       THREAD_AND_LOCATION,
4827       vmSymbols::java_lang_ClassFormatError(),
4828       "Illegal class modifiers in class %s%s: 0x%X",
4829       _class_name->as_C_string(), class_note, flags
4830     );
4831     return;
4832   }
4833 }
4834 
4835 static bool has_illegal_visibility(jint flags) {
4836   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4837   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4838   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4839 
4840   return ((is_public && is_protected) ||
4841           (is_public && is_private) ||
4842           (is_protected && is_private));
4843 }
4844 
4845 // A legal major_version.minor_version must be one of the following:
4846 //
4847 //  Major_version >= 45 and major_version < 56, any minor_version.
4848 //  Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4849 //  Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.

4879         "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4880         "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4881         class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4882       return;
4883     }
4884 
4885     if (!Arguments::enable_preview()) {
4886       classfile_ucve_error("Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4887                            class_name, major, minor, THREAD);
4888       return;
4889     }
4890 
4891   } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4892     classfile_ucve_error("%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4893                          class_name, major, minor, THREAD);
4894   }
4895 }
4896 
4897 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4898                                                    bool is_interface,
4899                                                    bool is_inline_type,
4900                                                    bool is_permits_value_class,
4901                                                    TRAPS) const {
4902   if (!_need_verify) { return; }
4903 
4904   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4905   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4906   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4907   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
4908   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
4909   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
4910   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4911   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
4912   const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4913 
4914   bool is_illegal = false;
4915 
4916   if (is_interface) {
4917     if (!is_public || !is_static || !is_final || is_private ||
4918         is_protected || is_volatile || is_transient ||
4919         (major_gte_1_5 && is_enum)) {
4920       is_illegal = true;
4921     }
4922   } else { // not interface
4923     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4924       is_illegal = true;
4925     } else {
4926       if (is_inline_type && !is_static && !is_final) {
4927         is_illegal = true;
4928       } else if (is_permits_value_class && !is_static) {
4929         is_illegal = true;
4930       }
4931     }
4932   }
4933 
4934   if (is_illegal) {
4935     ResourceMark rm(THREAD);
4936     Exceptions::fthrow(
4937       THREAD_AND_LOCATION,
4938       vmSymbols::java_lang_ClassFormatError(),
4939       "Illegal field modifiers in class %s: 0x%X",
4940       _class_name->as_C_string(), flags);
4941     return;
4942   }
4943 }
4944 
4945 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4946                                                     bool is_interface,
4947                                                     bool is_inline_type,
4948                                                     bool is_permits_value_class,
4949                                                     const Symbol* name,
4950                                                     TRAPS) const {
4951   if (!_need_verify) { return; }
4952 
4953   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
4954   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
4955   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
4956   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
4957   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
4958   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
4959   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
4960   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
4961   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4962   const bool is_protected    = (flags & JVM_ACC_PROTECTED)    != 0;
4963   const bool major_gte_1_5   = _major_version >= JAVA_1_5_VERSION;
4964   const bool major_gte_8     = _major_version >= JAVA_8_VERSION;
4965   const bool major_gte_17    = _major_version >= JAVA_17_VERSION;
4966   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
4967 
4968   bool is_illegal = false;
4969 
4970   const char* class_note = "";
4971   if (is_interface) {
4972     if (major_gte_8) {
4973       // Class file version is JAVA_8_VERSION or later Methods of
4974       // interfaces may set any of the flags except ACC_PROTECTED,
4975       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4976       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4977       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4978           (is_native || is_protected || is_final || is_synchronized) ||
4979           // If a specific method of a class or interface has its
4980           // ACC_ABSTRACT flag set, it must not have any of its
4981           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4982           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
4983           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4984           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4985           (is_abstract && (is_private || is_static || (!major_gte_17 && is_strict)))) {
4986         is_illegal = true;
4987       }
4988     } else if (major_gte_1_5) {
4989       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4990       if (!is_public || is_private || is_protected || is_static || is_final ||
4991           is_synchronized || is_native || !is_abstract || is_strict) {
4992         is_illegal = true;
4993       }
4994     } else {
4995       // Class file version is pre-JAVA_1_5_VERSION
4996       if (!is_public || is_static || is_final || is_native || !is_abstract) {
4997         is_illegal = true;
4998       }
4999     }
5000   } else { // not interface
5001     if (has_illegal_visibility(flags)) {
5002       is_illegal = true;
5003     } else {
5004       if (is_initializer) {
5005         if (is_final || is_synchronized || is_native ||
5006             is_abstract || (major_gte_1_5 && is_bridge)) {
5007           is_illegal = true;
5008         }
5009         if (!is_static && !is_inline_type) {
5010           // OK, an object constructor in a regular class
5011         } else if (is_static && is_inline_type) {
5012           // OK, a static init factory in an inline class
5013         } else {
5014           // but no other combinations are allowed
5015           is_illegal = true;
5016           class_note = (is_inline_type ? " (an inline class)" : " (not an inline class)");
5017         }
5018       } else { // not initializer
5019         if ((is_inline_type || is_permits_value_class) && is_synchronized && !is_static) {
5020           is_illegal = true;
5021           class_note = " (an inline class)";
5022         } else {
5023           if (is_abstract) {
5024             if ((is_final || is_native || is_private || is_static ||
5025                 (major_gte_1_5 && (is_synchronized || (!major_gte_17 && is_strict))))) {
5026               is_illegal = true;
5027             }
5028           }
5029         }
5030       }
5031     }
5032   }
5033 
5034   if (is_illegal) {
5035     ResourceMark rm(THREAD);
5036     Exceptions::fthrow(
5037       THREAD_AND_LOCATION,
5038       vmSymbols::java_lang_ClassFormatError(),
5039       "Method %s in class %s%s has illegal modifiers: 0x%X",
5040       name->as_C_string(), _class_name->as_C_string(), class_note, flags);
5041     return;
5042   }
5043 }
5044 
5045 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5046                                         int length,
5047                                         TRAPS) const {
5048   assert(_need_verify, "only called when _need_verify is true");
5049   if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5050     classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
5051   }
5052 }
5053 
5054 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5055 // In class names, '/' separates unqualified names.  This is verified in this function also.
5056 // Method names also may not contain the characters '<' or '>', unless <init>
5057 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
5058 // method.  Because these names have been checked as special cases before
5059 // calling this method in verify_legal_method_name.
5060 //

5178 // be taken as a field signature. Allow "void" if void_ok.
5179 // Return a pointer to just past the signature.
5180 // Return NULL if no legal signature is found.
5181 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5182                                                        bool void_ok,
5183                                                        unsigned int length,
5184                                                        TRAPS) const {
5185   unsigned int array_dim = 0;
5186   while (length > 0) {
5187     switch (signature[0]) {
5188     case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5189     case JVM_SIGNATURE_BOOLEAN:
5190     case JVM_SIGNATURE_BYTE:
5191     case JVM_SIGNATURE_CHAR:
5192     case JVM_SIGNATURE_SHORT:
5193     case JVM_SIGNATURE_INT:
5194     case JVM_SIGNATURE_FLOAT:
5195     case JVM_SIGNATURE_LONG:
5196     case JVM_SIGNATURE_DOUBLE:
5197       return signature + 1;
5198     case JVM_SIGNATURE_PRIMITIVE_OBJECT:
5199       // Can't enable this check fully until JDK upgrades the bytecode generators.
5200       // For now, compare to class file version 51 so old verifier doesn't see Q signatures.
5201       if (_major_version < 51 /* CONSTANT_CLASS_DESCRIPTORS */ ) {
5202         classfile_parse_error("Class name contains illegal Q-signature "
5203                               "in descriptor in class file %s",
5204                               CHECK_0);
5205         return NULL;
5206       }
5207       // fall through
5208     case JVM_SIGNATURE_CLASS:
5209     {
5210       if (_major_version < JAVA_1_5_VERSION) {
5211         // Skip over the class name if one is there
5212         const char* const p = skip_over_field_name(signature + 1, true, --length);
5213 
5214         // The next character better be a semicolon
5215         if (p && (p - signature) > 1 && p[0] == JVM_SIGNATURE_ENDCLASS) {
5216           return p + 1;
5217         }
5218       }
5219       else {
5220         // Skip leading 'L' or 'Q' and ignore first appearance of ';'
5221         signature++;
5222         const char* c = (const char*) memchr(signature, JVM_SIGNATURE_ENDCLASS, length - 1);
5223         // Format check signature
5224         if (c != NULL) {
5225           int newlen = c - (char*) signature;
5226           bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5227           if (!legal) {
5228             classfile_parse_error("Class name is empty or contains illegal character "
5229                                   "in descriptor in class file %s",
5230                                   THREAD);
5231             return NULL;
5232           }
5233           return signature + newlen + 1;
5234         }
5235       }
5236       return NULL;
5237     }
5238     case JVM_SIGNATURE_ARRAY:
5239       array_dim++;
5240       if (array_dim > 255) {

5256 
5257 // Checks if name is a legal class name.
5258 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5259   if (!_need_verify || _relax_verify) { return; }
5260 
5261   assert(name->refcount() > 0, "symbol must be kept alive");
5262   char* bytes = (char*)name->bytes();
5263   unsigned int length = name->utf8_length();
5264   bool legal = false;
5265 
5266   if (length > 0) {
5267     const char* p;
5268     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5269       p = skip_over_field_signature(bytes, false, length, CHECK);
5270       legal = (p != NULL) && ((p - bytes) == (int)length);
5271     } else if (_major_version < JAVA_1_5_VERSION) {
5272       if (bytes[0] != JVM_SIGNATURE_SPECIAL) {
5273         p = skip_over_field_name(bytes, true, length);
5274         legal = (p != NULL) && ((p - bytes) == (int)length);
5275       }
5276     } else if ((_major_version >= CONSTANT_CLASS_DESCRIPTORS || _class_name->starts_with("jdk/internal/reflect/"))
5277                    && bytes[length - 1] == ';' ) {
5278       // Support for L...; and Q...; descriptors
5279       legal = verify_unqualified_name(bytes + 1, length - 2, LegalClass);
5280     } else {
5281       // 4900761: relax the constraints based on JSR202 spec
5282       // Class names may be drawn from the entire Unicode character set.
5283       // Identifiers between '/' must be unqualified names.
5284       // The utf8 string has been verified when parsing cpool entries.
5285       legal = verify_unqualified_name(bytes, length, LegalClass);
5286     }
5287   }
5288   if (!legal) {
5289     ResourceMark rm(THREAD);
5290     assert(_class_name != NULL, "invariant");
5291     Exceptions::fthrow(
5292       THREAD_AND_LOCATION,
5293       vmSymbols::java_lang_ClassFormatError(),
5294       "Illegal class name \"%.*s\" in class file %s", length, bytes,
5295       _class_name->as_C_string()
5296     );
5297     return;
5298   }
5299 }

5357 
5358   if (!legal) {
5359     ResourceMark rm(THREAD);
5360     assert(_class_name != NULL, "invariant");
5361     Exceptions::fthrow(
5362       THREAD_AND_LOCATION,
5363       vmSymbols::java_lang_ClassFormatError(),
5364       "Illegal method name \"%.*s\" in class %s", length, bytes,
5365       _class_name->as_C_string()
5366     );
5367     return;
5368   }
5369 }
5370 
5371 
5372 // Checks if signature is a legal field signature.
5373 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5374                                                    const Symbol* signature,
5375                                                    TRAPS) const {
5376   if (!_need_verify) { return; }
5377   if (!supports_inline_types() && (signature->is_Q_signature() || signature->is_Q_array_signature())) {
5378     throwIllegalSignature("Field", name, signature, CHECK);
5379   }
5380 
5381   const char* const bytes = (const char* const)signature->bytes();
5382   const unsigned int length = signature->utf8_length();
5383   const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5384 
5385   if (p == NULL || (p - bytes) != (int)length) {
5386     throwIllegalSignature("Field", name, signature, CHECK);
5387   }
5388 }
5389 
5390 // Check that the signature is compatible with the method name.  For example,
5391 // check that <init> has a void signature.
5392 void ClassFileParser::verify_legal_name_with_signature(const Symbol* name,
5393                                                        const Symbol* signature,
5394                                                        TRAPS) const {
5395   if (!_need_verify) {
5396     return;
5397   }
5398 
5399   // Class initializers cannot have args for class format version >= 51.
5400   if (name == vmSymbols::class_initializer_name() &&
5401       signature != vmSymbols::void_method_signature() &&
5402       _major_version >= JAVA_7_VERSION) {
5403     throwIllegalSignature("Method", name, signature, THREAD);
5404     return;
5405   }
5406 
5407   if (!is_inline_type()) {
5408     int sig_length = signature->utf8_length();
5409     if (name->utf8_length() > 0 &&
5410       name->char_at(0) == JVM_SIGNATURE_SPECIAL &&
5411       sig_length > 0 &&
5412       signature->char_at(sig_length - 1) != JVM_SIGNATURE_VOID) {
5413       throwIllegalSignature("Method", name, signature, THREAD);
5414     }
5415   }
5416 }
5417 
5418 // Checks if signature is a legal method signature.
5419 // Returns number of parameters
5420 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5421                                                    const Symbol* signature,
5422                                                    TRAPS) const {
5423   if (!_need_verify) {
5424     // make sure caller's args_size will be less than 0 even for non-static
5425     // method so it will be recomputed in compute_size_of_parameters().
5426     return -2;
5427   }
5428 
5429   unsigned int args_size = 0;
5430   const char* p = (const char*)signature->bytes();
5431   unsigned int length = signature->utf8_length();
5432   const char* nextp;
5433 
5434   // The first character must be a '('

5570   }
5571 }
5572 
5573 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook,
5574                                                       const ClassInstanceInfo& cl_inst_info,
5575                                                       TRAPS) {
5576   if (_klass != NULL) {
5577     return _klass;
5578   }
5579 
5580   InstanceKlass* const ik =
5581     InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5582 
5583   if (is_hidden()) {
5584     mangle_hidden_class_name(ik);
5585   }
5586 
5587   fill_instance_klass(ik, changed_by_loadhook, cl_inst_info, CHECK_NULL);
5588 
5589   assert(_klass == ik, "invariant");

5590   return ik;
5591 }
5592 
5593 // Return true if the specified class is not a valid super class for an inline type.
5594 // A valid super class for an inline type is abstract, has no instance fields,
5595 // is not declared with the identity modifier (checked elsewhere), has
5596 // an empty body-less no-arg constructor, and no synchronized instance methods.
5597 // This function doesn't check if the class's super types are invalid.  Those checks
5598 // are done elsewhere.  The final determination of whether or not a class is an
5599 // invalid super type for an inline class is done in fill_instance_klass().
5600 bool ClassFileParser::is_invalid_super_for_inline_type() {
5601   if (is_interface() || class_name() == vmSymbols::java_lang_Object()) {
5602     return false;
5603   }
5604   if (!access_flags().is_abstract() || _has_nonstatic_fields) {
5605     return true;
5606   } else {
5607     // Look at each method
5608     for (int x = 0; x < _methods->length(); x++) {
5609       const Method* const method = _methods->at(x);
5610       if (method->is_synchronized() && !method->is_static()) {
5611         return true;
5612 
5613       } else if (method->name() == vmSymbols::object_initializer_name()) {
5614         if (method->signature() != vmSymbols::void_method_signature() ||
5615             !method->is_vanilla_constructor()) {
5616           return true;
5617         }
5618       }
5619     }
5620   }
5621   return false;
5622 }
5623 
5624 void ClassFileParser::fill_instance_klass(InstanceKlass* ik,
5625                                           bool changed_by_loadhook,
5626                                           const ClassInstanceInfo& cl_inst_info,
5627                                           TRAPS) {
5628   assert(ik != NULL, "invariant");
5629 
5630   // Set name and CLD before adding to CLD
5631   ik->set_class_loader_data(_loader_data);
5632   ik->set_name(_class_name);
5633 
5634   // Add all classes to our internal class loader list here,
5635   // including classes in the bootstrap (NULL) class loader.
5636   const bool publicize = !is_internal();
5637 
5638   _loader_data->add_class(ik, publicize);
5639 
5640   set_klass_to_deallocate(ik);
5641 
5642   assert(_field_info != NULL, "invariant");
5643   assert(ik->static_field_size() == _field_info->_static_field_size, "sanity");
5644   assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->_nonstatic_oop_map_count,
5645          "sanity");
5646 
5647   assert(ik->is_instance_klass(), "sanity");
5648   assert(ik->size_helper() == _field_info->_instance_size, "sanity");
5649 
5650   // Fill in information already parsed
5651   ik->set_should_verify_class(_need_verify);
5652 
5653   // Not yet: supers are done below to support the new subtype-checking fields
5654   ik->set_nonstatic_field_size(_field_info->_nonstatic_field_size);
5655   ik->set_has_nonstatic_fields(_field_info->_has_nonstatic_fields);
5656   if (_field_info->_is_naturally_atomic && ik->is_inline_klass()) {
5657     ik->set_is_naturally_atomic();
5658   }
5659 
5660   if (this->_invalid_inline_super) {
5661     ik->set_invalid_inline_super();
5662   }
5663 
5664   assert(_fac != NULL, "invariant");
5665   ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_INLINE]);
5666 
5667   // this transfers ownership of a lot of arrays from
5668   // the parser onto the InstanceKlass*
5669   apply_parsed_class_metadata(ik, _java_fields_count);
5670 
5671   // can only set dynamic nest-host after static nest information is set
5672   if (cl_inst_info.dynamic_nest_host() != NULL) {
5673     ik->set_nest_host(cl_inst_info.dynamic_nest_host());
5674   }
5675 
5676   // note that is not safe to use the fields in the parser from this point on
5677   assert(NULL == _cp, "invariant");
5678   assert(NULL == _fields, "invariant");
5679   assert(NULL == _methods, "invariant");
5680   assert(NULL == _inner_classes, "invariant");
5681   assert(NULL == _nest_members, "invariant");
5682   assert(NULL == _preload_classes, "invariant");
5683   assert(NULL == _combined_annotations, "invariant");
5684   assert(NULL == _record_components, "invariant");
5685   assert(NULL == _permitted_subclasses, "invariant");
5686 
5687   if (_has_final_method) {
5688     ik->set_has_final_method();
5689   }
5690 
5691   ik->copy_method_ordering(_method_ordering, CHECK);
5692   // The InstanceKlass::_methods_jmethod_ids cache
5693   // is managed on the assumption that the initial cache
5694   // size is equal to the number of methods in the class. If
5695   // that changes, then InstanceKlass::idnum_can_increment()
5696   // has to be changed accordingly.
5697   ik->set_initial_method_idnum(ik->methods()->length());
5698 
5699   ik->set_this_class_index(_this_class_index);
5700 
5701   if (_is_hidden) {
5702     // _this_class_index is a CONSTANT_Class entry that refers to this
5703     // hidden class itself. If this class needs to refer to its own methods
5704     // or fields, it would use a CONSTANT_MethodRef, etc, which would reference
5705     // _this_class_index. However, because this class is hidden (it's
5706     // not stored in SystemDictionary), _this_class_index cannot be resolved
5707     // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5708     // Therefore, we must eagerly resolve _this_class_index now.
5709     ik->constants()->klass_at_put(_this_class_index, ik);
5710   }
5711 
5712   ik->set_minor_version(_minor_version);
5713   ik->set_major_version(_major_version);
5714   ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5715   ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5716   if (_is_declared_atomic) {
5717     ik->set_is_declared_atomic();
5718   }
5719 
5720   if (_is_hidden) {
5721     ik->set_is_hidden();
5722   }
5723 
5724   // Set PackageEntry for this_klass
5725   oop cl = ik->class_loader();
5726   Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5727   ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5728   ik->set_package(cld, NULL, CHECK);
5729 
5730   const Array<Method*>* const methods = ik->methods();
5731   assert(methods != NULL, "invariant");
5732   const int methods_len = methods->length();
5733 
5734   check_methods_for_intrinsics(ik, methods);
5735 
5736   // Fill in field values obtained by parse_classfile_attributes
5737   if (_parsed_annotations->has_any_annotations()) {
5738     _parsed_annotations->apply_to(ik);

5806 
5807   assert(_all_mirandas != NULL, "invariant");
5808 
5809   // Generate any default methods - default methods are public interface methods
5810   // that have a default implementation.  This is new with Java 8.
5811   if (_has_nonstatic_concrete_methods) {
5812     DefaultMethods::generate_default_methods(ik,
5813                                              _all_mirandas,
5814                                              CHECK);
5815   }
5816 
5817   // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5818   if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5819       !module_entry->has_default_read_edges()) {
5820     if (!module_entry->set_has_default_read_edges()) {
5821       // We won a potential race
5822       JvmtiExport::add_default_read_edges(module_handle, THREAD);
5823     }
5824   }
5825 
5826   bool all_fields_empty = true;
5827   for (AllFieldStream fs(ik->fields(), ik->constants()); !fs.done(); fs.next()) {
5828     if (!fs.access_flags().is_static()) {
5829       if (fs.field_descriptor().is_inline_type()) {
5830         Klass* k = _inline_type_field_klasses->at(fs.index());
5831         ik->set_inline_type_field_klass(fs.index(), k);
5832         if (!InlineKlass::cast(k)->is_empty_inline_type()) { all_fields_empty = false; }
5833       } else {
5834         all_fields_empty = false;
5835       }
5836     } else if (is_inline_type() && (fs.name() == vmSymbols::default_value_name())) {
5837       InlineKlass::cast(ik)->set_default_value_offset(ik->field_offset(fs.index()));
5838     }
5839   }
5840 
5841   if (_is_empty_inline_type || (is_inline_type() && all_fields_empty)) {
5842     ik->set_is_empty_inline_type();
5843   }
5844 
5845   if (is_inline_type()) {
5846     InlineKlass* vk = InlineKlass::cast(ik);
5847     vk->set_alignment(_alignment);
5848     vk->set_first_field_offset(_first_field_offset);
5849     vk->set_exact_size_in_bytes(_exact_size_in_bytes);
5850     InlineKlass::cast(ik)->initialize_calling_convention(CHECK);
5851   }
5852 
5853   ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5854 
5855   if (!is_internal()) {
5856     ik->print_class_load_logging(_loader_data, module_entry, _stream);
5857 
5858     if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5859         ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5860         log_is_enabled(Info, class, preview)) {
5861       ResourceMark rm;
5862       log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5863                                ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5864     }
5865 
5866     if (log_is_enabled(Debug, class, resolve))  {
5867       ResourceMark rm;
5868       // print out the superclass.
5869       const char * from = ik->external_name();
5870       if (ik->java_super() != NULL) {
5871         log_debug(class, resolve)("%s %s (super)",
5872                    from,

5923 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5924                                  Symbol* name,
5925                                  ClassLoaderData* loader_data,
5926                                  const ClassLoadInfo* cl_info,
5927                                  Publicity pub_level,
5928                                  TRAPS) :
5929   _stream(stream),
5930   _class_name(NULL),
5931   _loader_data(loader_data),
5932   _is_hidden(cl_info->is_hidden()),
5933   _can_access_vm_annotations(cl_info->can_access_vm_annotations()),
5934   _orig_cp_size(0),
5935   _super_klass(),
5936   _cp(NULL),
5937   _fields(NULL),
5938   _methods(NULL),
5939   _inner_classes(NULL),
5940   _nest_members(NULL),
5941   _nest_host(0),
5942   _permitted_subclasses(NULL),
5943   _preload_classes(NULL),
5944   _record_components(NULL),
5945   _temp_local_interfaces(NULL),
5946   _local_interfaces(NULL),
5947   _transitive_interfaces(NULL),
5948   _combined_annotations(NULL),
5949   _class_annotations(NULL),
5950   _class_type_annotations(NULL),
5951   _fields_annotations(NULL),
5952   _fields_type_annotations(NULL),
5953   _klass(NULL),
5954   _klass_to_deallocate(NULL),
5955   _parsed_annotations(NULL),
5956   _fac(NULL),
5957   _field_info(NULL),
5958   _inline_type_field_klasses(NULL),
5959   _method_ordering(NULL),
5960   _all_mirandas(NULL),
5961   _vtable_size(0),
5962   _itable_size(0),
5963   _num_miranda_methods(0),
5964   _rt(REF_NONE),
5965   _protection_domain(cl_info->protection_domain()),
5966   _access_flags(),
5967   _pub_level(pub_level),
5968   _bad_constant_seen(0),
5969   _synthetic_flag(false),
5970   _sde_length(false),
5971   _sde_buffer(NULL),
5972   _sourcefile_index(0),
5973   _generic_signature_index(0),
5974   _major_version(0),
5975   _minor_version(0),
5976   _this_class_index(0),
5977   _super_class_index(0),
5978   _itfs_len(0),
5979   _java_fields_count(0),
5980   _need_verify(false),
5981   _relax_verify(false),
5982   _has_nonstatic_concrete_methods(false),
5983   _declares_nonstatic_concrete_methods(false),
5984   _has_final_method(false),
5985   _has_contended_fields(false),
5986   _has_inline_type_fields(false),
5987   _has_nonstatic_fields(false),
5988   _is_empty_inline_type(false),
5989   _is_naturally_atomic(false),
5990   _is_declared_atomic(false),
5991   _invalid_inline_super(false),
5992   _invalid_identity_super(false),
5993   _has_finalizer(false),
5994   _has_empty_finalizer(false),
5995   _has_vanilla_constructor(false),
5996   _max_bootstrap_specifier_index(-1) {
5997 
5998   _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5999   _class_name->increment_refcount();
6000 
6001   assert(_loader_data != NULL, "invariant");
6002   assert(stream != NULL, "invariant");
6003   assert(_stream != NULL, "invariant");
6004   assert(_stream->buffer() == _stream->current(), "invariant");
6005   assert(_class_name != NULL, "invariant");
6006   assert(0 == _access_flags.as_int(), "invariant");
6007 
6008   // Figure out whether we can skip format checking (matching classic VM behavior)
6009   if (DumpSharedSpaces) {
6010     // verify == true means it's a 'remote' class (i.e., non-boot class)
6011     // Verification decision is based on BytecodeVerificationRemote flag
6012     // for those classes.

6022   stream->set_verify(_need_verify);
6023 
6024   // Check if verification needs to be relaxed for this class file
6025   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
6026   _relax_verify = relax_format_check_for(_loader_data);
6027 
6028   parse_stream(stream, CHECK);
6029 
6030   post_process_parsed_stream(stream, _cp, CHECK);
6031 }
6032 
6033 void ClassFileParser::clear_class_metadata() {
6034   // metadata created before the instance klass is created.  Must be
6035   // deallocated if classfile parsing returns an error.
6036   _cp = NULL;
6037   _fields = NULL;
6038   _methods = NULL;
6039   _inner_classes = NULL;
6040   _nest_members = NULL;
6041   _permitted_subclasses = NULL;
6042   _preload_classes = NULL;
6043   _combined_annotations = NULL;
6044   _class_annotations = _class_type_annotations = NULL;
6045   _fields_annotations = _fields_type_annotations = NULL;
6046   _record_components = NULL;
6047 }
6048 
6049 // Destructor to clean up
6050 ClassFileParser::~ClassFileParser() {
6051   _class_name->decrement_refcount();
6052 
6053   if (_cp != NULL) {
6054     MetadataFactory::free_metadata(_loader_data, _cp);
6055   }
6056   if (_fields != NULL) {
6057     MetadataFactory::free_array<u2>(_loader_data, _fields);
6058   }
6059 
6060   if (_inline_type_field_klasses != NULL) {
6061      MetadataFactory::free_array<InlineKlass*>(_loader_data, _inline_type_field_klasses);
6062   }
6063 
6064   if (_methods != NULL) {
6065     // Free methods
6066     InstanceKlass::deallocate_methods(_loader_data, _methods);
6067   }
6068 
6069   // beware of the Universe::empty_blah_array!!
6070   if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6071     MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6072   }
6073 
6074   if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
6075     MetadataFactory::free_array<u2>(_loader_data, _nest_members);
6076   }
6077 
6078   if (_record_components != NULL) {
6079     InstanceKlass::deallocate_record_components(_loader_data, _record_components);
6080   }
6081 
6082   if (_permitted_subclasses != NULL && _permitted_subclasses != Universe::the_empty_short_array()) {
6083     MetadataFactory::free_array<u2>(_loader_data, _permitted_subclasses);
6084   }
6085 
6086   if (_preload_classes != NULL && _preload_classes != Universe::the_empty_short_array()) {
6087     MetadataFactory::free_array<u2>(_loader_data, _preload_classes);
6088   }
6089 
6090   // Free interfaces
6091   InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6092                                        _local_interfaces, _transitive_interfaces);
6093 
6094   if (_combined_annotations != NULL) {
6095     // After all annotations arrays have been created, they are installed into the
6096     // Annotations object that will be assigned to the InstanceKlass being created.
6097 
6098     // Deallocate the Annotations object and the installed annotations arrays.
6099     _combined_annotations->deallocate_contents(_loader_data);
6100 
6101     // If the _combined_annotations pointer is non-NULL,
6102     // then the other annotations fields should have been cleared.
6103     assert(_class_annotations       == NULL, "Should have been cleared");
6104     assert(_class_type_annotations  == NULL, "Should have been cleared");
6105     assert(_fields_annotations      == NULL, "Should have been cleared");
6106     assert(_fields_type_annotations == NULL, "Should have been cleared");
6107   } else {
6108     // If the annotations arrays were not installed into the Annotations object,
6109     // then they have to be deallocated explicitly.

6154     cp_size, CHECK);
6155 
6156   _orig_cp_size = cp_size;
6157   if (is_hidden()) { // Add a slot for hidden class name.
6158     cp_size++;
6159   }
6160 
6161   _cp = ConstantPool::allocate(_loader_data,
6162                                cp_size,
6163                                CHECK);
6164 
6165   ConstantPool* const cp = _cp;
6166 
6167   parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6168 
6169   assert(cp_size == (const u2)cp->length(), "invariant");
6170 
6171   // ACCESS FLAGS
6172   stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
6173 
6174   jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;

6175   // JVM_ACC_MODULE is defined in JDK-9 and later.
6176   if (_major_version >= JAVA_9_VERSION) {
6177     recognized_modifiers |= JVM_ACC_MODULE;


6178   }
6179   // JVM_ACC_VALUE and JVM_ACC_PRIMITIVE are defined for class file version 55 and later
6180   if (supports_inline_types()) {
6181     recognized_modifiers |= JVM_ACC_PRIMITIVE | JVM_ACC_VALUE | JVM_ACC_PERMITS_VALUE;
6182   }
6183 
6184   // Access flags
6185   jint flags = stream->get_u2_fast() & recognized_modifiers;
6186 
6187   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6188     // Set abstract bit for old class files for backward compatibility
6189     flags |= JVM_ACC_ABSTRACT;
6190   }
6191 
6192   verify_legal_class_modifiers(flags, CHECK);
6193 
6194   short bad_constant = class_bad_constant_seen();
6195   if (bad_constant != 0) {
6196     // Do not throw CFE until after the access_flags are checked because if
6197     // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6198     classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, THREAD);
6199     return;
6200   }
6201 
6202   _access_flags.set_flags(flags);
6203 
6204   // This class and superclass
6205   _this_class_index = stream->get_u2_fast();

6272       if (stream->source() != NULL) {
6273         ls.print(" source: %s", stream->source());
6274       }
6275       ls.cr();
6276     }
6277   }
6278 
6279   // SUPERKLASS
6280   _super_class_index = stream->get_u2_fast();
6281   _super_klass = parse_super_class(cp,
6282                                    _super_class_index,
6283                                    _need_verify,
6284                                    CHECK);
6285 
6286   // Interfaces
6287   _itfs_len = stream->get_u2_fast();
6288   parse_interfaces(stream,
6289                    _itfs_len,
6290                    cp,
6291                    &_has_nonstatic_concrete_methods,
6292                    &_is_declared_atomic,
6293                    CHECK);
6294 
6295   assert(_temp_local_interfaces != NULL, "invariant");
6296 
6297   // Fields (offsets are filled in later)
6298   _fac = new FieldAllocationCount();
6299   parse_fields(stream,
6300                is_interface(),
6301                is_inline_type(),
6302                is_permits_value_class(),
6303                _fac,
6304                cp,
6305                cp_size,
6306                &_java_fields_count,
6307                CHECK);
6308 
6309   assert(_fields != NULL, "invariant");
6310 
6311   // Methods
6312   AccessFlags promoted_flags;
6313   parse_methods(stream,
6314                 is_interface(),
6315                 is_inline_type(),
6316                 is_permits_value_class(),
6317                 &promoted_flags,
6318                 &_has_final_method,
6319                 &_declares_nonstatic_concrete_methods,
6320                 CHECK);
6321 
6322   assert(_methods != NULL, "invariant");
6323 
6324   // promote flags from parse_methods() to the klass' flags
6325   _access_flags.add_promoted_flags(promoted_flags.as_int());
6326 
6327   if (_declares_nonstatic_concrete_methods) {
6328     _has_nonstatic_concrete_methods = true;
6329   }
6330 
6331   // Additional attributes/annotations
6332   _parsed_annotations = new ClassAnnotationCollector();
6333   parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6334 
6335   assert(_inner_classes != NULL, "invariant");
6336 

6378 
6379   // Update this_class_index's slot in the constant pool with the new Utf8 entry.
6380   // We have to update the resolved_klass_index and the name_index together
6381   // so extract the existing resolved_klass_index first.
6382   CPKlassSlot cp_klass_slot = _cp->klass_slot_at(_this_class_index);
6383   int resolved_klass_index = cp_klass_slot.resolved_klass_index();
6384   _cp->unresolved_klass_at_put(_this_class_index, hidden_index, resolved_klass_index);
6385   assert(_cp->klass_slot_at(_this_class_index).name_index() == _orig_cp_size,
6386          "Bad name_index");
6387 }
6388 
6389 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6390                                                  ConstantPool* cp,
6391                                                  TRAPS) {
6392   assert(stream != NULL, "invariant");
6393   assert(stream->at_eos(), "invariant");
6394   assert(cp != NULL, "invariant");
6395   assert(_loader_data != NULL, "invariant");
6396 
6397   if (_class_name == vmSymbols::java_lang_Object()) {
6398     check_property(_temp_local_interfaces->length() == 0,
6399         "java.lang.Object cannot implement an interface in class file %s",
6400         CHECK);
6401   }
6402   // We check super class after class file is parsed and format is checked
6403   if (_super_class_index > 0 && NULL == _super_klass) {
6404     Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6405     if (is_interface()) {
6406       // Before attempting to resolve the superclass, check for class format
6407       // errors not checked yet.
6408       guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6409         "Interfaces must have java.lang.Object as superclass in class file %s",
6410         CHECK);
6411     }
6412     Handle loader(THREAD, _loader_data->class_loader());
6413     _super_klass = (const InstanceKlass*)
6414                        SystemDictionary::resolve_super_or_fail(_class_name,
6415                                                                super_class_name,
6416                                                                loader,
6417                                                                _protection_domain,
6418                                                                true,
6419                                                                CHECK);
6420   }
6421 
6422   if (_super_klass != NULL) {
6423     if (_super_klass->has_nonstatic_concrete_methods()) {
6424       _has_nonstatic_concrete_methods = true;
6425     }
6426     if (_super_klass->is_declared_atomic()) {
6427       _is_declared_atomic = true;
6428     }
6429 
6430     if (_super_klass->is_interface()) {
6431       classfile_icce_error("class %s has interface %s as super class", _super_klass, THREAD);
6432       return;
6433     }
6434 
6435     // For an inline class, only java/lang/Object or special abstract classes
6436     // are acceptable super classes.
6437     if (is_inline_type()) {
6438       const InstanceKlass* super_ik = _super_klass;
6439       if (super_ik->invalid_inline_super()) {
6440         classfile_icce_error("inline class %s has an invalid super class %s", _super_klass, THREAD);
6441         return;
6442       }
6443     }
6444   }
6445 
6446   if (_class_name == vmSymbols::java_lang_NonTearable() && _loader_data->class_loader() == NULL) {
6447     // This is the original source of this condition.
6448     // It propagates by inheritance, as if testing "instanceof NonTearable".
6449     _is_declared_atomic = true;
6450   } else if (*ForceNonTearable != '\0') {
6451     // Allow a command line switch to force the same atomicity property:
6452     const char* class_name_str = _class_name->as_C_string();
6453     if (StringUtils::class_list_match(ForceNonTearable, class_name_str)) {
6454       _is_declared_atomic = true;
6455     }
6456   }
6457 
6458   // Set ik->invalid_inline_super field to TRUE if already marked as invalid,
6459   // if super is marked invalid, or if is_invalid_super_for_inline_type()
6460   // returns true
6461   if (invalid_inline_super() ||
6462       (_super_klass != NULL && _super_klass->invalid_inline_super()) ||
6463       is_invalid_super_for_inline_type()) {
6464     set_invalid_inline_super();
6465   }
6466 
6467   int itfs_len = _temp_local_interfaces->length();
6468   if (itfs_len == 0) {
6469     _local_interfaces = Universe::the_empty_instance_klass_array();
6470   } else {
6471     _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
6472     for (int i = 0; i < itfs_len; i++) {
6473       _local_interfaces->at_put(i, _temp_local_interfaces->at(i));
6474     }
6475   }
6476   _temp_local_interfaces = NULL;
6477   assert(_local_interfaces != NULL, "invariant");
6478 
6479   // Compute the transitive list of all unique interfaces implemented by this class
6480   _transitive_interfaces =
6481     compute_transitive_interfaces(_super_klass,
6482                                   _local_interfaces,
6483                                   _loader_data,
6484                                   CHECK);
6485 
6486   assert(_transitive_interfaces != NULL, "invariant");
6487 
6488   // sort methods
6489   _method_ordering = sort_methods(_methods);
6490 
6491   _all_mirandas = new GrowableArray<Method*>(20);
6492 
6493   Handle loader(THREAD, _loader_data->class_loader());
6494   klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6495                                                     &_num_miranda_methods,
6496                                                     _all_mirandas,
6497                                                     _super_klass,
6498                                                     _methods,
6499                                                     _access_flags,
6500                                                     _major_version,
6501                                                     loader,
6502                                                     _class_name,
6503                                                     _local_interfaces);
6504 
6505   // Size of Java itable (in words)
6506   _itable_size = is_interface() ? 0 :
6507     klassItable::compute_itable_size(_transitive_interfaces);
6508 
6509   assert(_fac != NULL, "invariant");
6510   assert(_parsed_annotations != NULL, "invariant");
6511 
6512 
6513   if (EnableValhalla) {
6514     _inline_type_field_klasses = MetadataFactory::new_array<InlineKlass*>(_loader_data,
6515                                                    java_fields_count(),
6516                                                    NULL,
6517                                                    CHECK);
6518     for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
6519       if (Signature::basic_type(fs.signature()) == T_PRIMITIVE_OBJECT && !fs.access_flags().is_static()) {
6520         // Pre-load inline class
6521         Klass* klass = SystemDictionary::resolve_inline_type_field_or_fail(&fs,
6522             Handle(THREAD, _loader_data->class_loader()),
6523             _protection_domain, true, CHECK);
6524         assert(klass != NULL, "Sanity check");
6525         if (!klass->access_flags().is_value_class()) {
6526           assert(klass->is_instance_klass(), "Sanity check");
6527           ResourceMark rm(THREAD);
6528             THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
6529                       err_msg("Class %s expects class %s to be an inline type, but it is not",
6530                       _class_name->as_C_string(),
6531                       InstanceKlass::cast(klass)->external_name()));
6532         }
6533         _inline_type_field_klasses->at_put(fs.index(), InlineKlass::cast(klass));
6534       }
6535     }
6536   }
6537 
6538   _field_info = new FieldLayoutInfo();
6539   FieldLayoutBuilder lb(class_name(), super_klass(), _cp, _fields,
6540       _parsed_annotations->is_contended(), is_inline_type(),
6541       _field_info, _inline_type_field_klasses);
6542   lb.build_layout(CHECK);
6543   if (is_inline_type()) {
6544     _alignment = lb.get_alignment();
6545     _first_field_offset = lb.get_first_field_offset();
6546     _exact_size_in_bytes = lb.get_exact_size_in_byte();
6547   }
6548   _has_inline_type_fields = _field_info->_has_inline_fields;
6549 
6550   // Compute reference type
6551   _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();

6552 }
6553 
6554 void ClassFileParser::set_klass(InstanceKlass* klass) {
6555 
6556 #ifdef ASSERT
6557   if (klass != NULL) {
6558     assert(NULL == _klass, "leaking?");
6559   }
6560 #endif
6561 
6562   _klass = klass;
6563 }
6564 
6565 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6566 
6567 #ifdef ASSERT
6568   if (klass != NULL) {
6569     assert(NULL == _klass_to_deallocate, "leaking?");
6570   }
6571 #endif
6572 
6573   _klass_to_deallocate = klass;
6574 }
6575 
6576 // Caller responsible for ResourceMark
6577 // clone stream with rewound position
6578 const ClassFileStream* ClassFileParser::clone_stream() const {
6579   assert(_stream != NULL, "invariant");
6580 
6581   return _stream->clone();
6582 }
6583 
6584 // ----------------------------------------------------------------------------
6585 // debugging
6586 
6587 #ifdef ASSERT
6588 
6589 // return true if class_name contains no '.' (internal format is '/')
6590 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6591   if (class_name != NULL) {
6592     ResourceMark rm;
6593     char* name = class_name->as_C_string();
6594     return strchr(name, JVM_SIGNATURE_DOT) == NULL;
6595   } else {
6596     return true;
6597   }
6598 }
6599 
6600 #endif
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