1 /*
   2  * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   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 "aot/aotLoader.hpp"
  27 #include "classfile/classFileParser.hpp"
  28 #include "classfile/classFileStream.hpp"
  29 #include "classfile/classLoader.hpp"
  30 #include "classfile/classLoaderData.inline.hpp"
  31 #include "classfile/defaultMethods.hpp"
  32 #include "classfile/dictionary.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/vmSymbols.hpp"
  41 #include "logging/log.hpp"
  42 #include "logging/logStream.hpp"
  43 #include "memory/allocation.hpp"
  44 #include "memory/metadataFactory.hpp"
  45 #include "memory/oopFactory.hpp"
  46 #include "memory/resourceArea.hpp"
  47 #include "memory/universe.hpp"
  48 #include "oops/annotations.hpp"
  49 #include "oops/constantPool.inline.hpp"
  50 #include "oops/fieldStreams.hpp"
  51 #include "oops/instanceKlass.hpp"
  52 #include "oops/instanceMirrorKlass.hpp"
  53 #include "oops/klass.inline.hpp"
  54 #include "oops/klassVtable.hpp"
  55 #include "oops/metadata.hpp"
  56 #include "oops/method.inline.hpp"
  57 #include "oops/oop.inline.hpp"
  58 #include "oops/symbol.hpp"
  59 #include "oops/valueKlass.hpp"
  60 #include "prims/jvmtiExport.hpp"
  61 #include "prims/jvmtiThreadState.hpp"
  62 #include "runtime/arguments.hpp"

  63 #include "runtime/handles.inline.hpp"
  64 #include "runtime/javaCalls.hpp"
  65 #include "runtime/os.hpp"
  66 #include "runtime/perfData.hpp"
  67 #include "runtime/reflection.hpp"
  68 #include "runtime/safepointVerifiers.hpp"
  69 #include "runtime/signature.hpp"
  70 #include "runtime/timer.hpp"
  71 #include "services/classLoadingService.hpp"
  72 #include "services/threadService.hpp"
  73 #include "utilities/align.hpp"
  74 #include "utilities/bitMap.inline.hpp"
  75 #include "utilities/copy.hpp"
  76 #include "utilities/exceptions.hpp"
  77 #include "utilities/globalDefinitions.hpp"
  78 #include "utilities/growableArray.hpp"
  79 #include "utilities/macros.hpp"
  80 #include "utilities/ostream.hpp"
  81 #include "utilities/resourceHash.hpp"
  82 #include "utilities/utf8.hpp"
  83 
  84 #if INCLUDE_CDS
  85 #include "classfile/systemDictionaryShared.hpp"
  86 #endif
  87 #if INCLUDE_JFR
  88 #include "jfr/support/jfrTraceIdExtension.hpp"
  89 #endif
  90 
  91 // We generally try to create the oops directly when parsing, rather than
  92 // allocating temporary data structures and copying the bytes twice. A
  93 // temporary area is only needed when parsing utf8 entries in the constant
  94 // pool and when parsing line number tables.
  95 
  96 // We add assert in debug mode when class format is not checked.
  97 
  98 #define JAVA_CLASSFILE_MAGIC              0xCAFEBABE
  99 #define JAVA_MIN_SUPPORTED_VERSION        45
 100 #define JAVA_PREVIEW_MINOR_VERSION        65535
 101 
 102 // Used for two backward compatibility reasons:
 103 // - to check for new additions to the class file format in JDK1.5
 104 // - to check for bug fixes in the format checker in JDK1.5
 105 #define JAVA_1_5_VERSION                  49
 106 
 107 // Used for backward compatibility reasons:
 108 // - to check for javac bug fixes that happened after 1.5
 109 // - also used as the max version when running in jdk6
 110 #define JAVA_6_VERSION                    50
 111 
 112 // Used for backward compatibility reasons:
 113 // - to disallow argument and require ACC_STATIC for <clinit> methods
 114 #define JAVA_7_VERSION                    51
 115 
 116 // Extension method support.
 117 #define JAVA_8_VERSION                    52
 118 
 119 #define JAVA_9_VERSION                    53
 120 
 121 #define JAVA_10_VERSION                   54
 122 
 123 #define JAVA_11_VERSION                   55
 124 
 125 #define JAVA_12_VERSION                   56
 126 
 127 #define JAVA_13_VERSION                   57
 128 
 129 #define JAVA_14_VERSION                   58
 130 
 131 #define CONSTANT_CLASS_DESCRIPTORS        58
 132 
 133 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
 134   assert((bad_constant == JVM_CONSTANT_Module ||
 135           bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
 136          "Unexpected bad constant pool entry");
 137   if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
 138 }
 139 
 140 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
 141                                                   ConstantPool* cp,
 142                                                   const int length,
 143                                                   TRAPS) {
 144   assert(stream != NULL, "invariant");
 145   assert(cp != NULL, "invariant");
 146 
 147   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
 148   // this function (_current can be allocated in a register, with scalar
 149   // replacement of aggregates). The _current pointer is copied back to
 150   // stream() when this function returns. DON'T call another method within
 151   // this method that uses stream().
 152   const ClassFileStream cfs1 = *stream;
 153   const ClassFileStream* const cfs = &cfs1;
 154 
 155   assert(cfs->allocated_on_stack(), "should be local");
 156   debug_only(const u1* const old_current = stream->current();)
 157 
 158   // Used for batching symbol allocations.
 159   const char* names[SymbolTable::symbol_alloc_batch_size];
 160   int lengths[SymbolTable::symbol_alloc_batch_size];
 161   int indices[SymbolTable::symbol_alloc_batch_size];
 162   unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
 163   int names_count = 0;
 164 
 165   // parsing  Index 0 is unused
 166   for (int index = 1; index < length; index++) {
 167     // Each of the following case guarantees one more byte in the stream
 168     // for the following tag or the access_flags following constant pool,
 169     // so we don't need bounds-check for reading tag.
 170     const u1 tag = cfs->get_u1_fast();
 171     switch (tag) {
 172       case JVM_CONSTANT_Class: {
 173         cfs->guarantee_more(3, CHECK);  // name_index, tag/access_flags
 174         const u2 name_index = cfs->get_u2_fast();
 175         cp->klass_index_at_put(index, name_index);
 176         break;
 177       }
 178       case JVM_CONSTANT_Fieldref: {
 179         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 180         const u2 class_index = cfs->get_u2_fast();
 181         const u2 name_and_type_index = cfs->get_u2_fast();
 182         cp->field_at_put(index, class_index, name_and_type_index);
 183         break;
 184       }
 185       case JVM_CONSTANT_Methodref: {
 186         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 187         const u2 class_index = cfs->get_u2_fast();
 188         const u2 name_and_type_index = cfs->get_u2_fast();
 189         cp->method_at_put(index, class_index, name_and_type_index);
 190         break;
 191       }
 192       case JVM_CONSTANT_InterfaceMethodref: {
 193         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 194         const u2 class_index = cfs->get_u2_fast();
 195         const u2 name_and_type_index = cfs->get_u2_fast();
 196         cp->interface_method_at_put(index, class_index, name_and_type_index);
 197         break;
 198       }
 199       case JVM_CONSTANT_String : {
 200         cfs->guarantee_more(3, CHECK);  // string_index, tag/access_flags
 201         const u2 string_index = cfs->get_u2_fast();
 202         cp->string_index_at_put(index, string_index);
 203         break;
 204       }
 205       case JVM_CONSTANT_MethodHandle :
 206       case JVM_CONSTANT_MethodType: {
 207         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 208           classfile_parse_error(
 209             "Class file version does not support constant tag %u in class file %s",
 210             tag, CHECK);
 211         }
 212         if (tag == JVM_CONSTANT_MethodHandle) {
 213           cfs->guarantee_more(4, CHECK);  // ref_kind, method_index, tag/access_flags
 214           const u1 ref_kind = cfs->get_u1_fast();
 215           const u2 method_index = cfs->get_u2_fast();
 216           cp->method_handle_index_at_put(index, ref_kind, method_index);
 217         }
 218         else if (tag == JVM_CONSTANT_MethodType) {
 219           cfs->guarantee_more(3, CHECK);  // signature_index, tag/access_flags
 220           const u2 signature_index = cfs->get_u2_fast();
 221           cp->method_type_index_at_put(index, signature_index);
 222         }
 223         else {
 224           ShouldNotReachHere();
 225         }
 226         break;
 227       }
 228       case JVM_CONSTANT_Dynamic : {
 229         if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
 230           classfile_parse_error(
 231               "Class file version does not support constant tag %u in class file %s",
 232               tag, CHECK);
 233         }
 234         cfs->guarantee_more(5, CHECK);  // bsm_index, nt, tag/access_flags
 235         const u2 bootstrap_specifier_index = cfs->get_u2_fast();
 236         const u2 name_and_type_index = cfs->get_u2_fast();
 237         if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
 238           _max_bootstrap_specifier_index = (int) bootstrap_specifier_index;  // collect for later
 239         }
 240         cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
 241         break;
 242       }
 243       case JVM_CONSTANT_InvokeDynamic : {
 244         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 245           classfile_parse_error(
 246               "Class file version does not support constant tag %u in class file %s",
 247               tag, CHECK);
 248         }
 249         cfs->guarantee_more(5, CHECK);  // bsm_index, nt, tag/access_flags
 250         const u2 bootstrap_specifier_index = cfs->get_u2_fast();
 251         const u2 name_and_type_index = cfs->get_u2_fast();
 252         if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
 253           _max_bootstrap_specifier_index = (int) bootstrap_specifier_index;  // collect for later
 254         }
 255         cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
 256         break;
 257       }
 258       case JVM_CONSTANT_Integer: {
 259         cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 260         const u4 bytes = cfs->get_u4_fast();
 261         cp->int_at_put(index, (jint)bytes);
 262         break;
 263       }
 264       case JVM_CONSTANT_Float: {
 265         cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 266         const u4 bytes = cfs->get_u4_fast();
 267         cp->float_at_put(index, *(jfloat*)&bytes);
 268         break;
 269       }
 270       case JVM_CONSTANT_Long: {
 271         // A mangled type might cause you to overrun allocated memory
 272         guarantee_property(index + 1 < length,
 273                            "Invalid constant pool entry %u in class file %s",
 274                            index,
 275                            CHECK);
 276         cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 277         const u8 bytes = cfs->get_u8_fast();
 278         cp->long_at_put(index, bytes);
 279         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 280         break;
 281       }
 282       case JVM_CONSTANT_Double: {
 283         // A mangled type might cause you to overrun allocated memory
 284         guarantee_property(index+1 < length,
 285                            "Invalid constant pool entry %u in class file %s",
 286                            index,
 287                            CHECK);
 288         cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 289         const u8 bytes = cfs->get_u8_fast();
 290         cp->double_at_put(index, *(jdouble*)&bytes);
 291         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 292         break;
 293       }
 294       case JVM_CONSTANT_NameAndType: {
 295         cfs->guarantee_more(5, CHECK);  // name_index, signature_index, tag/access_flags
 296         const u2 name_index = cfs->get_u2_fast();
 297         const u2 signature_index = cfs->get_u2_fast();
 298         cp->name_and_type_at_put(index, name_index, signature_index);
 299         break;
 300       }
 301       case JVM_CONSTANT_Utf8 : {
 302         cfs->guarantee_more(2, CHECK);  // utf8_length
 303         u2  utf8_length = cfs->get_u2_fast();
 304         const u1* utf8_buffer = cfs->current();
 305         assert(utf8_buffer != NULL, "null utf8 buffer");
 306         // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
 307         cfs->guarantee_more(utf8_length+1, CHECK);  // utf8 string, tag/access_flags
 308         cfs->skip_u1_fast(utf8_length);
 309 
 310         // Before storing the symbol, make sure it's legal
 311         if (_need_verify) {
 312           verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
 313         }
 314 
 315         if (has_cp_patch_at(index)) {
 316           Handle patch = clear_cp_patch_at(index);
 317           guarantee_property(java_lang_String::is_instance(patch()),
 318                              "Illegal utf8 patch at %d in class file %s",
 319                              index,
 320                              CHECK);
 321           const char* const str = java_lang_String::as_utf8_string(patch());
 322           // (could use java_lang_String::as_symbol instead, but might as well batch them)
 323           utf8_buffer = (const u1*) str;
 324           utf8_length = (u2) strlen(str);
 325         }
 326 
 327         unsigned int hash;
 328         Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
 329                                                         utf8_length,
 330                                                         hash);
 331         if (result == NULL) {
 332           names[names_count] = (const char*)utf8_buffer;
 333           lengths[names_count] = utf8_length;
 334           indices[names_count] = index;
 335           hashValues[names_count++] = hash;
 336           if (names_count == SymbolTable::symbol_alloc_batch_size) {
 337             SymbolTable::new_symbols(_loader_data,
 338                                      cp,
 339                                      names_count,
 340                                      names,
 341                                      lengths,
 342                                      indices,
 343                                      hashValues);
 344             names_count = 0;
 345           }
 346         } else {
 347           cp->symbol_at_put(index, result);
 348         }
 349         break;
 350       }
 351       case JVM_CONSTANT_Module:
 352       case JVM_CONSTANT_Package: {
 353         // Record that an error occurred in these two cases but keep parsing so
 354         // that ACC_Module can be checked for in the access_flags.  Need to
 355         // throw NoClassDefFoundError in that case.
 356         if (_major_version >= JAVA_9_VERSION) {
 357           cfs->guarantee_more(3, CHECK);
 358           cfs->get_u2_fast();
 359           set_class_bad_constant_seen(tag);
 360           break;
 361         }
 362       }
 363       default: {
 364         classfile_parse_error("Unknown constant tag %u in class file %s",
 365                               tag,
 366                               CHECK);
 367         break;
 368       }
 369     } // end of switch(tag)
 370   } // end of for
 371 
 372   // Allocate the remaining symbols
 373   if (names_count > 0) {
 374     SymbolTable::new_symbols(_loader_data,
 375                              cp,
 376                              names_count,
 377                              names,
 378                              lengths,
 379                              indices,
 380                              hashValues);
 381   }
 382 
 383   // Copy _current pointer of local copy back to stream.
 384   assert(stream->current() == old_current, "non-exclusive use of stream");
 385   stream->set_current(cfs1.current());
 386 
 387 }
 388 
 389 static inline bool valid_cp_range(int index, int length) {
 390   return (index > 0 && index < length);
 391 }
 392 
 393 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
 394   assert(cp != NULL, "invariant");
 395   if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
 396     return cp->symbol_at(index);
 397   }
 398   return NULL;
 399 }
 400 
 401 #ifdef ASSERT
 402 PRAGMA_DIAG_PUSH
 403 PRAGMA_FORMAT_NONLITERAL_IGNORED
 404 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
 405   ResourceMark rm(THREAD);
 406   fatal(msg, _class_name->as_C_string());
 407 }
 408 
 409 void ClassFileParser::report_assert_property_failure(const char* msg,
 410                                                      int index,
 411                                                      TRAPS) const {
 412   ResourceMark rm(THREAD);
 413   fatal(msg, index, _class_name->as_C_string());
 414 }
 415 PRAGMA_DIAG_POP
 416 #endif
 417 
 418 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
 419                                          ConstantPool* const cp,
 420                                          const int length,
 421                                          TRAPS) {
 422   assert(cp != NULL, "invariant");
 423   assert(stream != NULL, "invariant");
 424 
 425   // parsing constant pool entries
 426   parse_constant_pool_entries(stream, cp, length, CHECK);
 427   if (class_bad_constant_seen() != 0) {
 428     // a bad CP entry has been detected previously so stop parsing and just return.
 429     return;
 430   }
 431 
 432   int index = 1;  // declared outside of loops for portability
 433   int num_klasses = 0;
 434 
 435   // first verification pass - validate cross references
 436   // and fixup class and string constants
 437   for (index = 1; index < length; index++) {          // Index 0 is unused
 438     const jbyte tag = cp->tag_at(index).value();
 439     switch (tag) {
 440       case JVM_CONSTANT_Class: {
 441         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 442         break;
 443       }
 444       case JVM_CONSTANT_Fieldref:
 445         // fall through
 446       case JVM_CONSTANT_Methodref:
 447         // fall through
 448       case JVM_CONSTANT_InterfaceMethodref: {
 449         if (!_need_verify) break;
 450         const int klass_ref_index = cp->klass_ref_index_at(index);
 451         const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
 452         check_property(valid_klass_reference_at(klass_ref_index),
 453                        "Invalid constant pool index %u in class file %s",
 454                        klass_ref_index, CHECK);
 455         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 456           cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 457           "Invalid constant pool index %u in class file %s",
 458           name_and_type_ref_index, CHECK);
 459         break;
 460       }
 461       case JVM_CONSTANT_String: {
 462         ShouldNotReachHere();     // Only JVM_CONSTANT_StringIndex should be present
 463         break;
 464       }
 465       case JVM_CONSTANT_Integer:
 466         break;
 467       case JVM_CONSTANT_Float:
 468         break;
 469       case JVM_CONSTANT_Long:
 470       case JVM_CONSTANT_Double: {
 471         index++;
 472         check_property(
 473           (index < length && cp->tag_at(index).is_invalid()),
 474           "Improper constant pool long/double index %u in class file %s",
 475           index, CHECK);
 476         break;
 477       }
 478       case JVM_CONSTANT_NameAndType: {
 479         if (!_need_verify) break;
 480         const int name_ref_index = cp->name_ref_index_at(index);
 481         const int signature_ref_index = cp->signature_ref_index_at(index);
 482         check_property(valid_symbol_at(name_ref_index),
 483           "Invalid constant pool index %u in class file %s",
 484           name_ref_index, CHECK);
 485         check_property(valid_symbol_at(signature_ref_index),
 486           "Invalid constant pool index %u in class file %s",
 487           signature_ref_index, CHECK);
 488         break;
 489       }
 490       case JVM_CONSTANT_Utf8:
 491         break;
 492       case JVM_CONSTANT_UnresolvedClass:         // fall-through
 493       case JVM_CONSTANT_UnresolvedClassInError: {
 494         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 495         break;
 496       }
 497       case JVM_CONSTANT_ClassIndex: {
 498         const int class_index = cp->klass_index_at(index);
 499         check_property(valid_symbol_at(class_index),
 500           "Invalid constant pool index %u in class file %s",
 501           class_index, CHECK);
 502 
 503         Symbol* const name = cp->symbol_at(class_index);
 504         const unsigned int name_len = name->utf8_length();
 505         if (name->is_Q_signature()) {
 506           cp->unresolved_qdescriptor_at_put(index, class_index, num_klasses++);
 507         } else {
 508           cp->unresolved_klass_at_put(index, class_index, num_klasses++);
 509         }
 510         break;
 511       }
 512       case JVM_CONSTANT_StringIndex: {
 513         const int string_index = cp->string_index_at(index);
 514         check_property(valid_symbol_at(string_index),
 515           "Invalid constant pool index %u in class file %s",
 516           string_index, CHECK);
 517         Symbol* const sym = cp->symbol_at(string_index);
 518         cp->unresolved_string_at_put(index, sym);
 519         break;
 520       }
 521       case JVM_CONSTANT_MethodHandle: {
 522         const int ref_index = cp->method_handle_index_at(index);
 523         check_property(valid_cp_range(ref_index, length),
 524           "Invalid constant pool index %u in class file %s",
 525           ref_index, CHECK);
 526         const constantTag tag = cp->tag_at(ref_index);
 527         const int ref_kind = cp->method_handle_ref_kind_at(index);
 528 
 529         switch (ref_kind) {
 530           case JVM_REF_getField:
 531           case JVM_REF_getStatic:
 532           case JVM_REF_putField:
 533           case JVM_REF_putStatic: {
 534             check_property(
 535               tag.is_field(),
 536               "Invalid constant pool index %u in class file %s (not a field)",
 537               ref_index, CHECK);
 538             break;
 539           }
 540           case JVM_REF_invokeVirtual:
 541           case JVM_REF_newInvokeSpecial: {
 542             check_property(
 543               tag.is_method(),
 544               "Invalid constant pool index %u in class file %s (not a method)",
 545               ref_index, CHECK);
 546             break;
 547           }
 548           case JVM_REF_invokeStatic:
 549           case JVM_REF_invokeSpecial: {
 550             check_property(
 551               tag.is_method() ||
 552               ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
 553               "Invalid constant pool index %u in class file %s (not a method)",
 554               ref_index, CHECK);
 555             break;
 556           }
 557           case JVM_REF_invokeInterface: {
 558             check_property(
 559               tag.is_interface_method(),
 560               "Invalid constant pool index %u in class file %s (not an interface method)",
 561               ref_index, CHECK);
 562             break;
 563           }
 564           default: {
 565             classfile_parse_error(
 566               "Bad method handle kind at constant pool index %u in class file %s",
 567               index, CHECK);
 568           }
 569         } // switch(refkind)
 570         // Keep the ref_index unchanged.  It will be indirected at link-time.
 571         break;
 572       } // case MethodHandle
 573       case JVM_CONSTANT_MethodType: {
 574         const int ref_index = cp->method_type_index_at(index);
 575         check_property(valid_symbol_at(ref_index),
 576           "Invalid constant pool index %u in class file %s",
 577           ref_index, CHECK);
 578         break;
 579       }
 580       case JVM_CONSTANT_Dynamic: {
 581         const int name_and_type_ref_index =
 582           cp->bootstrap_name_and_type_ref_index_at(index);
 583 
 584         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 585           cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 586           "Invalid constant pool index %u in class file %s",
 587           name_and_type_ref_index, CHECK);
 588         // bootstrap specifier index must be checked later,
 589         // when BootstrapMethods attr is available
 590 
 591         // Mark the constant pool as having a CONSTANT_Dynamic_info structure
 592         cp->set_has_dynamic_constant();
 593         break;
 594       }
 595       case JVM_CONSTANT_InvokeDynamic: {
 596         const int name_and_type_ref_index =
 597           cp->bootstrap_name_and_type_ref_index_at(index);
 598 
 599         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 600           cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 601           "Invalid constant pool index %u in class file %s",
 602           name_and_type_ref_index, CHECK);
 603         // bootstrap specifier index must be checked later,
 604         // when BootstrapMethods attr is available
 605         break;
 606       }
 607       default: {
 608         fatal("bad constant pool tag value %u", cp->tag_at(index).value());
 609         ShouldNotReachHere();
 610         break;
 611       }
 612     } // switch(tag)
 613   } // end of for
 614 
 615   _first_patched_klass_resolved_index = num_klasses;
 616   cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
 617 
 618   if (_cp_patches != NULL) {
 619     // need to treat this_class specially...
 620 
 621     // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
 622     // for now. These will be replaced with actual names of the patched classes in patch_class().
 623     Symbol* s = vmSymbols::star_name();
 624     for (int n=_orig_cp_size; n<cp->length(); n++) {
 625       cp->symbol_at_put(n, s);
 626     }
 627 
 628     int this_class_index;
 629     {
 630       stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
 631       const u1* const mark = stream->current();
 632       stream->skip_u2_fast(1); // skip flags
 633       this_class_index = stream->get_u2_fast();
 634       stream->set_current(mark);  // revert to mark
 635     }
 636 
 637     for (index = 1; index < length; index++) {          // Index 0 is unused
 638       if (has_cp_patch_at(index)) {
 639         guarantee_property(index != this_class_index,
 640           "Illegal constant pool patch to self at %d in class file %s",
 641           index, CHECK);
 642         patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
 643       }
 644     }
 645   }
 646 
 647   if (!_need_verify) {
 648     return;
 649   }
 650 
 651   // second verification pass - checks the strings are of the right format.
 652   // but not yet to the other entries
 653   for (index = 1; index < length; index++) {
 654     const jbyte tag = cp->tag_at(index).value();
 655     switch (tag) {
 656       case JVM_CONSTANT_UnresolvedClass: {
 657         const Symbol* const class_name = cp->klass_name_at(index);
 658         // check the name, even if _cp_patches will overwrite it
 659         verify_legal_class_name(class_name, CHECK);
 660         break;
 661       }
 662       case JVM_CONSTANT_NameAndType: {
 663         if (_need_verify) {
 664           const int sig_index = cp->signature_ref_index_at(index);
 665           const int name_index = cp->name_ref_index_at(index);
 666           const Symbol* const name = cp->symbol_at(name_index);
 667           const Symbol* const sig = cp->symbol_at(sig_index);
 668           guarantee_property(sig->utf8_length() != 0,
 669             "Illegal zero length constant pool entry at %d in class %s",
 670             sig_index, CHECK);
 671           guarantee_property(name->utf8_length() != 0,
 672             "Illegal zero length constant pool entry at %d in class %s",
 673             name_index, CHECK);
 674 
 675           if (sig->char_at(0) == JVM_SIGNATURE_FUNC) {
 676             // Format check method name and signature
 677             verify_legal_method_name(name, CHECK);
 678             verify_legal_method_signature(name, sig, CHECK);
 679           } else {
 680             // Format check field name and signature
 681             verify_legal_field_name(name, CHECK);
 682             verify_legal_field_signature(name, sig, CHECK);
 683           }
 684         }
 685         break;
 686       }
 687       case JVM_CONSTANT_Dynamic: {
 688         const int name_and_type_ref_index =
 689           cp->name_and_type_ref_index_at(index);
 690         // already verified to be utf8
 691         const int name_ref_index =
 692           cp->name_ref_index_at(name_and_type_ref_index);
 693         // already verified to be utf8
 694         const int signature_ref_index =
 695           cp->signature_ref_index_at(name_and_type_ref_index);
 696         const Symbol* const name = cp->symbol_at(name_ref_index);
 697         const Symbol* const signature = cp->symbol_at(signature_ref_index);
 698         if (_need_verify) {
 699           // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
 700           // Need only to be sure signature is non-zero length and the right type.
 701           if (signature->utf8_length() == 0 ||
 702               signature->char_at(0) == JVM_SIGNATURE_FUNC) {
 703             throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
 704           }
 705         }
 706         break;
 707       }
 708       case JVM_CONSTANT_InvokeDynamic:
 709       case JVM_CONSTANT_Fieldref:
 710       case JVM_CONSTANT_Methodref:
 711       case JVM_CONSTANT_InterfaceMethodref: {
 712         const int name_and_type_ref_index =
 713           cp->name_and_type_ref_index_at(index);
 714         // already verified to be utf8
 715         const int name_ref_index =
 716           cp->name_ref_index_at(name_and_type_ref_index);
 717         // already verified to be utf8
 718         const int signature_ref_index =
 719           cp->signature_ref_index_at(name_and_type_ref_index);
 720         const Symbol* const name = cp->symbol_at(name_ref_index);
 721         const Symbol* const signature = cp->symbol_at(signature_ref_index);
 722         if (tag == JVM_CONSTANT_Fieldref) {
 723           if (_need_verify) {
 724             // Field name and signature are verified above, when iterating NameAndType_info.
 725             // Need only to be sure signature is non-zero length and the right type.
 726             if (signature->utf8_length() == 0 ||
 727                 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
 728               throwIllegalSignature("Field", name, signature, CHECK);
 729             }
 730           }
 731         } else {
 732           if (_need_verify) {
 733             // Method name and signature are verified above, when iterating NameAndType_info.
 734             // Need only to be sure signature is non-zero length and the right type.
 735             if (signature->utf8_length() == 0 ||
 736                 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
 737               throwIllegalSignature("Method", name, signature, CHECK);
 738             }
 739           }
 740           // 4509014: If a class method name begins with '<', it must be "<init>"
 741           const unsigned int name_len = name->utf8_length();
 742           if (tag == JVM_CONSTANT_Methodref &&
 743               name_len != 0 &&
 744               name->char_at(0) == '<' &&
 745               name != vmSymbols::object_initializer_name()) {
 746             classfile_parse_error(
 747               "Bad method name at constant pool index %u in class file %s",
 748               name_ref_index, CHECK);
 749           }
 750         }
 751         break;
 752       }
 753       case JVM_CONSTANT_MethodHandle: {
 754         const int ref_index = cp->method_handle_index_at(index);
 755         const int ref_kind = cp->method_handle_ref_kind_at(index);
 756         switch (ref_kind) {
 757           case JVM_REF_invokeVirtual:
 758           case JVM_REF_invokeStatic:
 759           case JVM_REF_invokeSpecial:
 760           case JVM_REF_newInvokeSpecial: {
 761             const int name_and_type_ref_index =
 762               cp->name_and_type_ref_index_at(ref_index);
 763             const int name_ref_index =
 764               cp->name_ref_index_at(name_and_type_ref_index);
 765             const Symbol* const name = cp->symbol_at(name_ref_index);
 766             if (name != vmSymbols::object_initializer_name()) {
 767               if (ref_kind == JVM_REF_newInvokeSpecial) {
 768                 classfile_parse_error(
 769                   "Bad constructor name at constant pool index %u in class file %s",
 770                     name_ref_index, CHECK);
 771               }
 772             } else {
 773               // The allowed invocation mode of <init> depends on its signature.
 774               // This test corresponds to verify_invoke_instructions in the verifier.
 775               const int signature_ref_index =
 776                 cp->signature_ref_index_at(name_and_type_ref_index);
 777               const Symbol* const signature = cp->symbol_at(signature_ref_index);
 778               if (signature->is_void_method_signature()
 779                   && ref_kind == JVM_REF_newInvokeSpecial) {
 780                 // OK, could be a constructor call
 781               } else if (!signature->is_void_method_signature()
 782                          && ref_kind == JVM_REF_invokeStatic) {
 783                 // also OK, could be a static factory call
 784               } else {
 785                 classfile_parse_error(
 786                   "Bad method name at constant pool index %u in class file %s",
 787                   name_ref_index, CHECK);
 788               }
 789             }
 790             break;
 791           }
 792           // Other ref_kinds are already fully checked in previous pass.
 793         } // switch(ref_kind)
 794         break;
 795       }
 796       case JVM_CONSTANT_MethodType: {
 797         const Symbol* const no_name = vmSymbols::type_name(); // place holder
 798         const Symbol* const signature = cp->method_type_signature_at(index);
 799         verify_legal_method_signature(no_name, signature, CHECK);
 800         break;
 801       }
 802       case JVM_CONSTANT_Utf8: {
 803         assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
 804       }
 805     }  // switch(tag)
 806   }  // end of for
 807 }
 808 
 809 Handle ClassFileParser::clear_cp_patch_at(int index) {
 810   Handle patch = cp_patch_at(index);
 811   _cp_patches->at_put(index, Handle());
 812   assert(!has_cp_patch_at(index), "");
 813   return patch;
 814 }
 815 
 816 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
 817   int name_index = _orig_cp_size + _num_patched_klasses;
 818   int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
 819 
 820   cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
 821   _num_patched_klasses ++;
 822 }
 823 
 824 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
 825                                           int index,
 826                                           Handle patch,
 827                                           TRAPS) {
 828   assert(cp != NULL, "invariant");
 829 
 830   BasicType patch_type = T_VOID;
 831 
 832   switch (cp->tag_at(index).value()) {
 833 
 834     case JVM_CONSTANT_UnresolvedClass: {
 835       // Patching a class means pre-resolving it.
 836       // The name in the constant pool is ignored.
 837       if (java_lang_Class::is_instance(patch())) {
 838         guarantee_property(!java_lang_Class::is_primitive(patch()),
 839                            "Illegal class patch at %d in class file %s",
 840                            index, CHECK);
 841         Klass* k = java_lang_Class::as_Klass(patch());
 842         patch_class(cp, index, k, k->name());
 843       } else {
 844         guarantee_property(java_lang_String::is_instance(patch()),
 845                            "Illegal class patch at %d in class file %s",
 846                            index, CHECK);
 847         Symbol* const name = java_lang_String::as_symbol(patch());
 848         patch_class(cp, index, NULL, name);
 849       }
 850       break;
 851     }
 852 
 853     case JVM_CONSTANT_String: {
 854       // skip this patch and don't clear it.  Needs the oop array for resolved
 855       // references to be created first.
 856       return;
 857     }
 858     case JVM_CONSTANT_Integer: patch_type = T_INT;    goto patch_prim;
 859     case JVM_CONSTANT_Float:   patch_type = T_FLOAT;  goto patch_prim;
 860     case JVM_CONSTANT_Long:    patch_type = T_LONG;   goto patch_prim;
 861     case JVM_CONSTANT_Double:  patch_type = T_DOUBLE; goto patch_prim;
 862     patch_prim:
 863     {
 864       jvalue value;
 865       BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
 866       guarantee_property(value_type == patch_type,
 867                          "Illegal primitive patch at %d in class file %s",
 868                          index, CHECK);
 869       switch (value_type) {
 870         case T_INT:    cp->int_at_put(index,   value.i); break;
 871         case T_FLOAT:  cp->float_at_put(index, value.f); break;
 872         case T_LONG:   cp->long_at_put(index,  value.j); break;
 873         case T_DOUBLE: cp->double_at_put(index, value.d); break;
 874         default:       assert(false, "");
 875       }
 876     } // end patch_prim label
 877     break;
 878 
 879     default: {
 880       // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
 881       guarantee_property(!has_cp_patch_at(index),
 882                          "Illegal unexpected patch at %d in class file %s",
 883                          index, CHECK);
 884       return;
 885     }
 886   } // end of switch(tag)
 887 
 888   // On fall-through, mark the patch as used.
 889   clear_cp_patch_at(index);
 890 }
 891 class NameSigHash: public ResourceObj {
 892  public:
 893   const Symbol*       _name;       // name
 894   const Symbol*       _sig;        // signature
 895   NameSigHash*  _next;             // Next entry in hash table
 896 };
 897 
 898 static const int HASH_ROW_SIZE = 256;
 899 
 900 static unsigned int hash(const Symbol* name, const Symbol* sig) {
 901   unsigned int raw_hash = 0;
 902   raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
 903   raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
 904 
 905   return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
 906 }
 907 
 908 
 909 static void initialize_hashtable(NameSigHash** table) {
 910   memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
 911 }
 912 // Return false if the name/sig combination is found in table.
 913 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
 914 // The old format checker uses heap sort to find duplicates.
 915 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
 916 // of table since we don't expect Symbol*'s to move.
 917 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
 918   assert(name != NULL, "name in constant pool is NULL");
 919 
 920   // First lookup for duplicates
 921   int index = hash(name, sig);
 922   NameSigHash* entry = table[index];
 923   while (entry != NULL) {
 924     if (entry->_name == name && entry->_sig == sig) {
 925       return false;
 926     }
 927     entry = entry->_next;
 928   }
 929 
 930   // No duplicate is found, allocate a new entry and fill it.
 931   entry = new NameSigHash();
 932   entry->_name = name;
 933   entry->_sig = sig;
 934 
 935   // Insert into hash table
 936   entry->_next = table[index];
 937   table[index] = entry;
 938 
 939   return true;
 940 }
 941 
 942 // Side-effects: populates the _local_interfaces field
 943 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
 944                                        const int itfs_len,
 945                                        ConstantPool* const cp,
 946                                        bool* const has_nonstatic_concrete_methods,
 947                                        TRAPS) {
 948   assert(stream != NULL, "invariant");
 949   assert(cp != NULL, "invariant");
 950   assert(has_nonstatic_concrete_methods != NULL, "invariant");
 951 
 952   if (itfs_len == 0) {
 953     _local_interfaces = Universe::the_empty_instance_klass_array();
 954   } else {
 955     assert(itfs_len > 0, "only called for len>0");
 956     _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
 957 
 958     int index;
 959     for (index = 0; index < itfs_len; index++) {
 960       const u2 interface_index = stream->get_u2(CHECK);
 961       Klass* interf;
 962       check_property(
 963         valid_klass_reference_at(interface_index),
 964         "Interface name has bad constant pool index %u in class file %s",
 965         interface_index, CHECK);
 966       if (cp->tag_at(interface_index).is_klass()) {
 967         interf = cp->resolved_klass_at(interface_index);
 968       } else {
 969         Symbol* const unresolved_klass  = cp->klass_name_at(interface_index);
 970 
 971         // Don't need to check legal name because it's checked when parsing constant pool.
 972         // But need to make sure it's not an array type.
 973         guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
 974                            "Bad interface name in class file %s", CHECK);
 975 
 976         // Call resolve_super so classcircularity is checked
 977         interf = SystemDictionary::resolve_super_or_fail(
 978                                                   _class_name,
 979                                                   unresolved_klass,
 980                                                   Handle(THREAD, _loader_data->class_loader()),
 981                                                   _protection_domain,
 982                                                   false,
 983                                                   CHECK);
 984       }
 985 
 986       if (!interf->is_interface()) {
 987         THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
 988                   err_msg("class %s can not implement %s, because it is not an interface (%s)",
 989                           _class_name->as_klass_external_name(),
 990                           interf->external_name(),
 991                           interf->class_in_module_of_loader()));
 992       }
 993 
 994       if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
 995         *has_nonstatic_concrete_methods = true;
 996       }
 997       _local_interfaces->at_put(index, InstanceKlass::cast(interf));
 998     }
 999 
1000     if (!_need_verify || itfs_len <= 1) {
1001       return;
1002     }
1003 
1004     // Check if there's any duplicates in interfaces
1005     ResourceMark rm(THREAD);
1006     NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1007                                                                  NameSigHash*,
1008                                                                  HASH_ROW_SIZE);
1009     initialize_hashtable(interface_names);
1010     bool dup = false;
1011     const Symbol* name = NULL;
1012     {
1013       debug_only(NoSafepointVerifier nsv;)
1014       for (index = 0; index < itfs_len; index++) {
1015         const InstanceKlass* const k = _local_interfaces->at(index);
1016         name = k->name();
1017         // If no duplicates, add (name, NULL) in hashtable interface_names.
1018         if (!put_after_lookup(name, NULL, interface_names)) {
1019           dup = true;
1020           break;
1021         }
1022       }
1023     }
1024     if (dup) {
1025       classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1026                              name->as_C_string(), CHECK);
1027     }
1028   }
1029 }
1030 
1031 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1032                                            int constantvalue_index,
1033                                            int signature_index,
1034                                            TRAPS) const {
1035   // Make sure the constant pool entry is of a type appropriate to this field
1036   guarantee_property(
1037     (constantvalue_index > 0 &&
1038       constantvalue_index < cp->length()),
1039     "Bad initial value index %u in ConstantValue attribute in class file %s",
1040     constantvalue_index, CHECK);
1041 
1042   const constantTag value_type = cp->tag_at(constantvalue_index);
1043   switch(cp->basic_type_for_signature_at(signature_index)) {
1044     case T_LONG: {
1045       guarantee_property(value_type.is_long(),
1046                          "Inconsistent constant value type in class file %s",
1047                          CHECK);
1048       break;
1049     }
1050     case T_FLOAT: {
1051       guarantee_property(value_type.is_float(),
1052                          "Inconsistent constant value type in class file %s",
1053                          CHECK);
1054       break;
1055     }
1056     case T_DOUBLE: {
1057       guarantee_property(value_type.is_double(),
1058                          "Inconsistent constant value type in class file %s",
1059                          CHECK);
1060       break;
1061     }
1062     case T_BYTE:
1063     case T_CHAR:
1064     case T_SHORT:
1065     case T_BOOLEAN:
1066     case T_INT: {
1067       guarantee_property(value_type.is_int(),
1068                          "Inconsistent constant value type in class file %s",
1069                          CHECK);
1070       break;
1071     }
1072     case T_OBJECT: {
1073       guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1074                          && value_type.is_string()),
1075                          "Bad string initial value in class file %s",
1076                          CHECK);
1077       break;
1078     }
1079     default: {
1080       classfile_parse_error("Unable to set initial value %u in class file %s",
1081                              constantvalue_index,
1082                              CHECK);
1083     }
1084   }
1085 }
1086 
1087 class AnnotationCollector : public ResourceObj{
1088 public:
1089   enum Location { _in_field, _in_method, _in_class };
1090   enum ID {
1091     _unknown = 0,
1092     _method_CallerSensitive,
1093     _method_ForceInline,
1094     _method_DontInline,
1095     _method_InjectedProfile,
1096     _method_LambdaForm_Compiled,
1097     _method_Hidden,
1098     _method_HotSpotIntrinsicCandidate,
1099     _jdk_internal_vm_annotation_Contended,
1100     _field_Stable,
1101     _jdk_internal_vm_annotation_ReservedStackAccess,
1102     _annotation_LIMIT
1103   };
1104   const Location _location;
1105   int _annotations_present;
1106   u2 _contended_group;
1107 
1108   AnnotationCollector(Location location)
1109     : _location(location), _annotations_present(0)
1110   {
1111     assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1112   }
1113   // If this annotation name has an ID, report it (or _none).
1114   ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1115   // Set the annotation name:
1116   void set_annotation(ID id) {
1117     assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1118     _annotations_present |= nth_bit((int)id);
1119   }
1120 
1121   void remove_annotation(ID id) {
1122     assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1123     _annotations_present &= ~nth_bit((int)id);
1124   }
1125 
1126   // Report if the annotation is present.
1127   bool has_any_annotations() const { return _annotations_present != 0; }
1128   bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1129 
1130   void set_contended_group(u2 group) { _contended_group = group; }
1131   u2 contended_group() const { return _contended_group; }
1132 
1133   bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1134 
1135   void set_stable(bool stable) { set_annotation(_field_Stable); }
1136   bool is_stable() const { return has_annotation(_field_Stable); }
1137 };
1138 
1139 // This class also doubles as a holder for metadata cleanup.
1140 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1141 private:
1142   ClassLoaderData* _loader_data;
1143   AnnotationArray* _field_annotations;
1144   AnnotationArray* _field_type_annotations;
1145 public:
1146   FieldAnnotationCollector(ClassLoaderData* loader_data) :
1147     AnnotationCollector(_in_field),
1148     _loader_data(loader_data),
1149     _field_annotations(NULL),
1150     _field_type_annotations(NULL) {}
1151   ~FieldAnnotationCollector();
1152   void apply_to(FieldInfo* f);
1153   AnnotationArray* field_annotations()      { return _field_annotations; }
1154   AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1155 
1156   void set_field_annotations(AnnotationArray* a)      { _field_annotations = a; }
1157   void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1158 };
1159 
1160 class MethodAnnotationCollector : public AnnotationCollector{
1161 public:
1162   MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1163   void apply_to(const methodHandle& m);
1164 };
1165 
1166 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1167 public:
1168   ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1169   void apply_to(InstanceKlass* ik);
1170 };
1171 
1172 
1173 static int skip_annotation_value(const u1*, int, int); // fwd decl
1174 
1175 // Safely increment index by val if does not pass limit
1176 #define SAFE_ADD(index, limit, val) \
1177 if (index >= limit - val) return limit; \
1178 index += val;
1179 
1180 // Skip an annotation.  Return >=limit if there is any problem.
1181 static int skip_annotation(const u1* buffer, int limit, int index) {
1182   assert(buffer != NULL, "invariant");
1183   // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1184   // value := switch (tag:u1) { ... }
1185   SAFE_ADD(index, limit, 4); // skip atype and read nmem
1186   int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1187   while (--nmem >= 0 && index < limit) {
1188     SAFE_ADD(index, limit, 2); // skip member
1189     index = skip_annotation_value(buffer, limit, index);
1190   }
1191   return index;
1192 }
1193 
1194 // Skip an annotation value.  Return >=limit if there is any problem.
1195 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1196   assert(buffer != NULL, "invariant");
1197 
1198   // value := switch (tag:u1) {
1199   //   case B, C, I, S, Z, D, F, J, c: con:u2;
1200   //   case e: e_class:u2 e_name:u2;
1201   //   case s: s_con:u2;
1202   //   case [: do(nval:u2) {value};
1203   //   case @: annotation;
1204   //   case s: s_con:u2;
1205   // }
1206   SAFE_ADD(index, limit, 1); // read tag
1207   const u1 tag = buffer[index - 1];
1208   switch (tag) {
1209     case 'B':
1210     case 'C':
1211     case 'I':
1212     case 'S':
1213     case 'Z':
1214     case 'D':
1215     case 'F':
1216     case 'J':
1217     case 'c':
1218     case 's':
1219       SAFE_ADD(index, limit, 2);  // skip con or s_con
1220       break;
1221     case 'e':
1222       SAFE_ADD(index, limit, 4);  // skip e_class, e_name
1223       break;
1224     case '[':
1225     {
1226       SAFE_ADD(index, limit, 2); // read nval
1227       int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1228       while (--nval >= 0 && index < limit) {
1229         index = skip_annotation_value(buffer, limit, index);
1230       }
1231     }
1232     break;
1233     case '@':
1234       index = skip_annotation(buffer, limit, index);
1235       break;
1236     default:
1237       return limit;  //  bad tag byte
1238   }
1239   return index;
1240 }
1241 
1242 // Sift through annotations, looking for those significant to the VM:
1243 static void parse_annotations(const ConstantPool* const cp,
1244                               const u1* buffer, int limit,
1245                               AnnotationCollector* coll,
1246                               ClassLoaderData* loader_data,
1247                               TRAPS) {
1248 
1249   assert(cp != NULL, "invariant");
1250   assert(buffer != NULL, "invariant");
1251   assert(coll != NULL, "invariant");
1252   assert(loader_data != NULL, "invariant");
1253 
1254   // annotations := do(nann:u2) {annotation}
1255   int index = 2; // read nann
1256   if (index >= limit)  return;
1257   int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1258   enum {  // initial annotation layout
1259     atype_off = 0,      // utf8 such as 'Ljava/lang/annotation/Retention;'
1260     count_off = 2,      // u2   such as 1 (one value)
1261     member_off = 4,     // utf8 such as 'value'
1262     tag_off = 6,        // u1   such as 'c' (type) or 'e' (enum)
1263     e_tag_val = 'e',
1264     e_type_off = 7,   // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1265     e_con_off = 9,    // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1266     e_size = 11,     // end of 'e' annotation
1267     c_tag_val = 'c',    // payload is type
1268     c_con_off = 7,    // utf8 payload, such as 'I'
1269     c_size = 9,       // end of 'c' annotation
1270     s_tag_val = 's',    // payload is String
1271     s_con_off = 7,    // utf8 payload, such as 'Ljava/lang/String;'
1272     s_size = 9,
1273     min_size = 6        // smallest possible size (zero members)
1274   };
1275   // Cannot add min_size to index in case of overflow MAX_INT
1276   while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1277     int index0 = index;
1278     index = skip_annotation(buffer, limit, index);
1279     const u1* const abase = buffer + index0;
1280     const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1281     const int count = Bytes::get_Java_u2((address)abase + count_off);
1282     const Symbol* const aname = check_symbol_at(cp, atype);
1283     if (aname == NULL)  break;  // invalid annotation name
1284     const Symbol* member = NULL;
1285     if (count >= 1) {
1286       const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1287       member = check_symbol_at(cp, member_index);
1288       if (member == NULL)  break;  // invalid member name
1289     }
1290 
1291     // Here is where parsing particular annotations will take place.
1292     AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1293     if (AnnotationCollector::_unknown == id)  continue;
1294     coll->set_annotation(id);
1295 
1296     if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1297       // @Contended can optionally specify the contention group.
1298       //
1299       // Contended group defines the equivalence class over the fields:
1300       // the fields within the same contended group are not treated distinct.
1301       // The only exception is default group, which does not incur the
1302       // equivalence. Naturally, contention group for classes is meaningless.
1303       //
1304       // While the contention group is specified as String, annotation
1305       // values are already interned, and we might as well use the constant
1306       // pool index as the group tag.
1307       //
1308       u2 group_index = 0; // default contended group
1309       if (count == 1
1310         && s_size == (index - index0)  // match size
1311         && s_tag_val == *(abase + tag_off)
1312         && member == vmSymbols::value_name()) {
1313         group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1314         if (cp->symbol_at(group_index)->utf8_length() == 0) {
1315           group_index = 0; // default contended group
1316         }
1317       }
1318       coll->set_contended_group(group_index);
1319     }
1320   }
1321 }
1322 
1323 
1324 // Parse attributes for a field.
1325 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1326                                              u2 attributes_count,
1327                                              bool is_static, u2 signature_index,
1328                                              u2* const constantvalue_index_addr,
1329                                              bool* const is_synthetic_addr,
1330                                              u2* const generic_signature_index_addr,
1331                                              ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1332                                              TRAPS) {
1333   assert(cfs != NULL, "invariant");
1334   assert(constantvalue_index_addr != NULL, "invariant");
1335   assert(is_synthetic_addr != NULL, "invariant");
1336   assert(generic_signature_index_addr != NULL, "invariant");
1337   assert(parsed_annotations != NULL, "invariant");
1338   assert(attributes_count > 0, "attributes_count should be greater than 0");
1339 
1340   u2 constantvalue_index = 0;
1341   u2 generic_signature_index = 0;
1342   bool is_synthetic = false;
1343   const u1* runtime_visible_annotations = NULL;
1344   int runtime_visible_annotations_length = 0;
1345   const u1* runtime_invisible_annotations = NULL;
1346   int runtime_invisible_annotations_length = 0;
1347   const u1* runtime_visible_type_annotations = NULL;
1348   int runtime_visible_type_annotations_length = 0;
1349   const u1* runtime_invisible_type_annotations = NULL;
1350   int runtime_invisible_type_annotations_length = 0;
1351   bool runtime_invisible_annotations_exists = false;
1352   bool runtime_invisible_type_annotations_exists = false;
1353   const ConstantPool* const cp = _cp;
1354 
1355   while (attributes_count--) {
1356     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
1357     const u2 attribute_name_index = cfs->get_u2_fast();
1358     const u4 attribute_length = cfs->get_u4_fast();
1359     check_property(valid_symbol_at(attribute_name_index),
1360                    "Invalid field attribute index %u in class file %s",
1361                    attribute_name_index,
1362                    CHECK);
1363 
1364     const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1365     if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1366       // ignore if non-static
1367       if (constantvalue_index != 0) {
1368         classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1369       }
1370       check_property(
1371         attribute_length == 2,
1372         "Invalid ConstantValue field attribute length %u in class file %s",
1373         attribute_length, CHECK);
1374 
1375       constantvalue_index = cfs->get_u2(CHECK);
1376       if (_need_verify) {
1377         verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1378       }
1379     } else if (attribute_name == vmSymbols::tag_synthetic()) {
1380       if (attribute_length != 0) {
1381         classfile_parse_error(
1382           "Invalid Synthetic field attribute length %u in class file %s",
1383           attribute_length, CHECK);
1384       }
1385       is_synthetic = true;
1386     } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1387       if (attribute_length != 0) {
1388         classfile_parse_error(
1389           "Invalid Deprecated field attribute length %u in class file %s",
1390           attribute_length, CHECK);
1391       }
1392     } else if (_major_version >= JAVA_1_5_VERSION) {
1393       if (attribute_name == vmSymbols::tag_signature()) {
1394         if (generic_signature_index != 0) {
1395           classfile_parse_error(
1396             "Multiple Signature attributes for field in class file %s", CHECK);
1397         }
1398         if (attribute_length != 2) {
1399           classfile_parse_error(
1400             "Wrong size %u for field's Signature attribute in class file %s",
1401             attribute_length, CHECK);
1402         }
1403         generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1404       } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1405         if (runtime_visible_annotations != NULL) {
1406           classfile_parse_error(
1407             "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1408         }
1409         runtime_visible_annotations_length = attribute_length;
1410         runtime_visible_annotations = cfs->current();
1411         assert(runtime_visible_annotations != NULL, "null visible annotations");
1412         cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1413         parse_annotations(cp,
1414                           runtime_visible_annotations,
1415                           runtime_visible_annotations_length,
1416                           parsed_annotations,
1417                           _loader_data,
1418                           CHECK);
1419         cfs->skip_u1_fast(runtime_visible_annotations_length);
1420       } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1421         if (runtime_invisible_annotations_exists) {
1422           classfile_parse_error(
1423             "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1424         }
1425         runtime_invisible_annotations_exists = true;
1426         if (PreserveAllAnnotations) {
1427           runtime_invisible_annotations_length = attribute_length;
1428           runtime_invisible_annotations = cfs->current();
1429           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1430         }
1431         cfs->skip_u1(attribute_length, CHECK);
1432       } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1433         if (runtime_visible_type_annotations != NULL) {
1434           classfile_parse_error(
1435             "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1436         }
1437         runtime_visible_type_annotations_length = attribute_length;
1438         runtime_visible_type_annotations = cfs->current();
1439         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1440         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1441       } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1442         if (runtime_invisible_type_annotations_exists) {
1443           classfile_parse_error(
1444             "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1445         } else {
1446           runtime_invisible_type_annotations_exists = true;
1447         }
1448         if (PreserveAllAnnotations) {
1449           runtime_invisible_type_annotations_length = attribute_length;
1450           runtime_invisible_type_annotations = cfs->current();
1451           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1452         }
1453         cfs->skip_u1(attribute_length, CHECK);
1454       } else {
1455         cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1456       }
1457     } else {
1458       cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1459     }
1460   }
1461 
1462   *constantvalue_index_addr = constantvalue_index;
1463   *is_synthetic_addr = is_synthetic;
1464   *generic_signature_index_addr = generic_signature_index;
1465   AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1466                                             runtime_visible_annotations_length,
1467                                             runtime_invisible_annotations,
1468                                             runtime_invisible_annotations_length,
1469                                             CHECK);
1470   parsed_annotations->set_field_annotations(a);
1471   a = assemble_annotations(runtime_visible_type_annotations,
1472                            runtime_visible_type_annotations_length,
1473                            runtime_invisible_type_annotations,
1474                            runtime_invisible_type_annotations_length,
1475                            CHECK);
1476   parsed_annotations->set_field_type_annotations(a);
1477   return;
1478 }
1479 
1480 
1481 // Field allocation types. Used for computing field offsets.
1482 
1483 enum FieldAllocationType {
1484   STATIC_OOP,           // Oops
1485   STATIC_BYTE,          // Boolean, Byte, char
1486   STATIC_SHORT,         // shorts
1487   STATIC_WORD,          // ints
1488   STATIC_DOUBLE,        // aligned long or double
1489   STATIC_FLATTENABLE,   // flattenable field
1490   NONSTATIC_OOP,
1491   NONSTATIC_BYTE,
1492   NONSTATIC_SHORT,
1493   NONSTATIC_WORD,
1494   NONSTATIC_DOUBLE,
1495   NONSTATIC_FLATTENABLE,
1496   MAX_FIELD_ALLOCATION_TYPE,
1497   BAD_ALLOCATION_TYPE = -1
1498 };
1499 
1500 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1501   BAD_ALLOCATION_TYPE, // 0
1502   BAD_ALLOCATION_TYPE, // 1
1503   BAD_ALLOCATION_TYPE, // 2
1504   BAD_ALLOCATION_TYPE, // 3
1505   NONSTATIC_BYTE ,     // T_BOOLEAN     =  4,
1506   NONSTATIC_SHORT,     // T_CHAR        =  5,
1507   NONSTATIC_WORD,      // T_FLOAT       =  6,
1508   NONSTATIC_DOUBLE,    // T_DOUBLE      =  7,
1509   NONSTATIC_BYTE,      // T_BYTE        =  8,
1510   NONSTATIC_SHORT,     // T_SHORT       =  9,
1511   NONSTATIC_WORD,      // T_INT         = 10,
1512   NONSTATIC_DOUBLE,    // T_LONG        = 11,
1513   NONSTATIC_OOP,       // T_OBJECT      = 12,
1514   NONSTATIC_OOP,       // T_ARRAY       = 13,
1515   NONSTATIC_OOP,       // T_VALUETYPE   = 14,
1516   BAD_ALLOCATION_TYPE, // T_VOID        = 15,
1517   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 16,
1518   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 17,
1519   BAD_ALLOCATION_TYPE, // T_METADATA    = 18,
1520   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1521   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 20,
1522   BAD_ALLOCATION_TYPE, // 0
1523   BAD_ALLOCATION_TYPE, // 1
1524   BAD_ALLOCATION_TYPE, // 2
1525   BAD_ALLOCATION_TYPE, // 3
1526   STATIC_BYTE ,        // T_BOOLEAN     =  4,
1527   STATIC_SHORT,        // T_CHAR        =  5,
1528   STATIC_WORD,         // T_FLOAT       =  6,
1529   STATIC_DOUBLE,       // T_DOUBLE      =  7,
1530   STATIC_BYTE,         // T_BYTE        =  8,
1531   STATIC_SHORT,        // T_SHORT       =  9,
1532   STATIC_WORD,         // T_INT         = 10,
1533   STATIC_DOUBLE,       // T_LONG        = 11,
1534   STATIC_OOP,          // T_OBJECT      = 12,
1535   STATIC_OOP,          // T_ARRAY       = 13,
1536   STATIC_OOP,          // T_VALUETYPE   = 14,
1537   BAD_ALLOCATION_TYPE, // T_VOID        = 15,
1538   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 16,
1539   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 17,
1540   BAD_ALLOCATION_TYPE, // T_METADATA    = 18,
1541   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19,
1542   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 20
1543 };
1544 
1545 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type, bool is_flattenable) {
1546   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1547   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1548   assert(result != BAD_ALLOCATION_TYPE, "bad type");
1549   if (is_flattenable) {
1550     result = is_static ? STATIC_FLATTENABLE : NONSTATIC_FLATTENABLE;
1551   }
1552   return result;
1553 }
1554 
1555 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1556  public:
1557   u2 count[MAX_FIELD_ALLOCATION_TYPE];
1558 
1559   FieldAllocationCount() {
1560     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1561       count[i] = 0;
1562     }
1563   }
1564 
1565   FieldAllocationType update(bool is_static, BasicType type, bool is_flattenable) {
1566     FieldAllocationType atype = basic_type_to_atype(is_static, type, is_flattenable);
1567     if (atype != BAD_ALLOCATION_TYPE) {
1568       // Make sure there is no overflow with injected fields.
1569       assert(count[atype] < 0xFFFF, "More than 65535 fields");
1570       count[atype]++;
1571     }
1572     return atype;
1573   }
1574 };
1575 
1576 // Side-effects: populates the _fields, _fields_annotations,
1577 // _fields_type_annotations fields
1578 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1579                                    bool is_interface,
1580                                    bool is_value_type,
1581                                    FieldAllocationCount* const fac,
1582                                    ConstantPool* cp,
1583                                    const int cp_size,
1584                                    u2* const java_fields_count_ptr,
1585                                    TRAPS) {
1586 
1587   assert(cfs != NULL, "invariant");
1588   assert(fac != NULL, "invariant");
1589   assert(cp != NULL, "invariant");
1590   assert(java_fields_count_ptr != NULL, "invariant");
1591 
1592   assert(NULL == _fields, "invariant");
1593   assert(NULL == _fields_annotations, "invariant");
1594   assert(NULL == _fields_type_annotations, "invariant");
1595 
1596   cfs->guarantee_more(2, CHECK);  // length
1597   const u2 length = cfs->get_u2_fast();
1598   *java_fields_count_ptr = length;
1599 
1600   int num_injected = 0;
1601   const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1602                                                                   &num_injected);
1603 
1604   const int total_fields = length + num_injected + (is_value_type ? 1 : 0);
1605 
1606   // The field array starts with tuples of shorts
1607   // [access, name index, sig index, initial value index, byte offset].
1608   // A generic signature slot only exists for field with generic
1609   // signature attribute. And the access flag is set with
1610   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1611   // signature slots are at the end of the field array and after all
1612   // other fields data.
1613   //
1614   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1615   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1616   //       ...
1617   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1618   //       [generic signature index]
1619   //       [generic signature index]
1620   //       ...
1621   //
1622   // Allocate a temporary resource array for field data. For each field,
1623   // a slot is reserved in the temporary array for the generic signature
1624   // index. After parsing all fields, the data are copied to a permanent
1625   // array and any unused slots will be discarded.
1626   ResourceMark rm(THREAD);
1627   u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1628                                               u2,
1629                                               total_fields * (FieldInfo::field_slots + 1));
1630 
1631   // The generic signature slots start after all other fields' data.
1632   int generic_signature_slot = total_fields * FieldInfo::field_slots;
1633   int num_generic_signature = 0;
1634   for (int n = 0; n < length; n++) {
1635     // access_flags, name_index, descriptor_index, attributes_count
1636     cfs->guarantee_more(8, CHECK);
1637 
1638     jint recognized_modifiers = JVM_RECOGNIZED_FIELD_MODIFIERS;
1639 
1640     const jint flags = cfs->get_u2_fast() & recognized_modifiers;
1641     verify_legal_field_modifiers(flags, is_interface, is_value_type, CHECK);
1642     AccessFlags access_flags;
1643     access_flags.set_flags(flags);
1644 
1645     const u2 name_index = cfs->get_u2_fast();
1646     check_property(valid_symbol_at(name_index),
1647       "Invalid constant pool index %u for field name in class file %s",
1648       name_index, CHECK);
1649     const Symbol* const name = cp->symbol_at(name_index);
1650     verify_legal_field_name(name, CHECK);
1651 
1652     const u2 signature_index = cfs->get_u2_fast();
1653     check_property(valid_symbol_at(signature_index),
1654       "Invalid constant pool index %u for field signature in class file %s",
1655       signature_index, CHECK);
1656     const Symbol* const sig = cp->symbol_at(signature_index);
1657     verify_legal_field_signature(name, sig, CHECK);
1658     assert(!access_flags.is_flattenable(), "ACC_FLATTENABLE should have been filtered out");
1659     if (sig->is_Q_signature()) {
1660       // assert(_major_version >= CONSTANT_CLASS_DESCRIPTORS, "Q-descriptors are only supported in recent classfiles");
1661       access_flags.set_is_flattenable();
1662     }
1663     if (access_flags.is_flattenable()) {
1664       // Array flattenability cannot be specified.  Arrays of value classes are
1665       // are always flattenable.  Arrays of other classes are not flattenable.
1666       if (sig->utf8_length() > 1 && sig->char_at(0) == '[') {
1667         classfile_parse_error(
1668             "Field \"%s\" with signature \"%s\" in class file %s is invalid."
1669             " ACC_FLATTENABLE cannot be specified for an array",
1670             name->as_C_string(), sig->as_klass_external_name(), CHECK);
1671       }
1672       _has_flattenable_fields = true;
1673     }
1674 
1675     u2 constantvalue_index = 0;
1676     bool is_synthetic = false;
1677     u2 generic_signature_index = 0;
1678     const bool is_static = access_flags.is_static();
1679     FieldAnnotationCollector parsed_annotations(_loader_data);
1680 
1681     const u2 attributes_count = cfs->get_u2_fast();
1682     if (attributes_count > 0) {
1683       parse_field_attributes(cfs,
1684                              attributes_count,
1685                              is_static,
1686                              signature_index,
1687                              &constantvalue_index,
1688                              &is_synthetic,
1689                              &generic_signature_index,
1690                              &parsed_annotations,
1691                              CHECK);
1692 
1693       if (parsed_annotations.field_annotations() != NULL) {
1694         if (_fields_annotations == NULL) {
1695           _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1696                                              _loader_data, length, NULL,
1697                                              CHECK);
1698         }
1699         _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1700         parsed_annotations.set_field_annotations(NULL);
1701       }
1702       if (parsed_annotations.field_type_annotations() != NULL) {
1703         if (_fields_type_annotations == NULL) {
1704           _fields_type_annotations =
1705             MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1706                                                          length,
1707                                                          NULL,
1708                                                          CHECK);
1709         }
1710         _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1711         parsed_annotations.set_field_type_annotations(NULL);
1712       }
1713 
1714       if (is_synthetic) {
1715         access_flags.set_is_synthetic();
1716       }
1717       if (generic_signature_index != 0) {
1718         access_flags.set_field_has_generic_signature();
1719         fa[generic_signature_slot] = generic_signature_index;
1720         generic_signature_slot ++;
1721         num_generic_signature ++;
1722       }
1723     }
1724 
1725     FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1726     field->initialize(access_flags.as_short(),
1727                       name_index,
1728                       signature_index,
1729                       constantvalue_index);
1730     const BasicType type = cp->basic_type_for_signature_at(signature_index);
1731 
1732     // Remember how many oops we encountered and compute allocation type
1733     const FieldAllocationType atype = fac->update(is_static, type, access_flags.is_flattenable());
1734     field->set_allocation_type(atype);
1735 
1736     // After field is initialized with type, we can augment it with aux info
1737     if (parsed_annotations.has_any_annotations())
1738       parsed_annotations.apply_to(field);
1739   }
1740 
1741   int index = length;
1742   if (num_injected != 0) {
1743     for (int n = 0; n < num_injected; n++) {
1744       // Check for duplicates
1745       if (injected[n].may_be_java) {
1746         const Symbol* const name      = injected[n].name();
1747         const Symbol* const signature = injected[n].signature();
1748         bool duplicate = false;
1749         for (int i = 0; i < length; i++) {
1750           const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1751           if (name      == cp->symbol_at(f->name_index()) &&
1752               signature == cp->symbol_at(f->signature_index())) {
1753             // Symbol is desclared in Java so skip this one
1754             duplicate = true;
1755             break;
1756           }
1757         }
1758         if (duplicate) {
1759           // These will be removed from the field array at the end
1760           continue;
1761         }
1762       }
1763 
1764       // Injected field
1765       FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1766       field->initialize(JVM_ACC_FIELD_INTERNAL,
1767                         injected[n].name_index,
1768                         injected[n].signature_index,
1769                         0);
1770 
1771       const BasicType type = FieldType::basic_type(injected[n].signature());
1772 
1773       // Remember how many oops we encountered and compute allocation type
1774       const FieldAllocationType atype = fac->update(false, type, false);
1775       field->set_allocation_type(atype);
1776       index++;
1777     }
1778   }
1779 
1780   if (is_value_type) {
1781     index = length + num_injected;
1782     FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1783     field->initialize(JVM_ACC_FIELD_INTERNAL | JVM_ACC_STATIC,
1784                       vmSymbols::default_value_name_enum,
1785                       vmSymbols::java_lang_Object_enum,
1786                       0);
1787     const BasicType type = FieldType::basic_type(vmSymbols::object_signature());
1788     const FieldAllocationType atype = fac->update(true, type, false);
1789     field->set_allocation_type(atype);
1790     index++;
1791   }
1792 
1793   assert(NULL == _fields, "invariant");
1794 
1795   _fields =
1796     MetadataFactory::new_array<u2>(_loader_data,
1797                                    index * FieldInfo::field_slots + num_generic_signature,
1798                                    CHECK);
1799   // Sometimes injected fields already exist in the Java source so
1800   // the fields array could be too long.  In that case the
1801   // fields array is trimed. Also unused slots that were reserved
1802   // for generic signature indexes are discarded.
1803   {
1804     int i = 0;
1805     for (; i < index * FieldInfo::field_slots; i++) {
1806       _fields->at_put(i, fa[i]);
1807     }
1808     for (int j = total_fields * FieldInfo::field_slots;
1809          j < generic_signature_slot; j++) {
1810       _fields->at_put(i++, fa[j]);
1811     }
1812     assert(_fields->length() == i, "");
1813   }
1814 
1815   if (_need_verify && length > 1) {
1816     // Check duplicated fields
1817     ResourceMark rm(THREAD);
1818     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1819       THREAD, NameSigHash*, HASH_ROW_SIZE);
1820     initialize_hashtable(names_and_sigs);
1821     bool dup = false;
1822     const Symbol* name = NULL;
1823     const Symbol* sig = NULL;
1824     {
1825       debug_only(NoSafepointVerifier nsv;)
1826       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1827         name = fs.name();
1828         sig = fs.signature();
1829         // If no duplicates, add name/signature in hashtable names_and_sigs.
1830         if (!put_after_lookup(name, sig, names_and_sigs)) {
1831           dup = true;
1832           break;
1833         }
1834       }
1835     }
1836     if (dup) {
1837       classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1838                              name->as_C_string(), sig->as_klass_external_name(), CHECK);
1839     }
1840   }
1841 }
1842 
1843 
1844 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1845                                                                          u4 code_length,
1846                                                                          u4 exception_table_length,
1847                                                                          TRAPS) {
1848   assert(cfs != NULL, "invariant");
1849 
1850   const unsafe_u2* const exception_table_start = cfs->current();
1851   assert(exception_table_start != NULL, "null exception table");
1852 
1853   cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1854                                                                // end_pc,
1855                                                                // handler_pc,
1856                                                                // catch_type_index
1857 
1858   // Will check legal target after parsing code array in verifier.
1859   if (_need_verify) {
1860     for (unsigned int i = 0; i < exception_table_length; i++) {
1861       const u2 start_pc = cfs->get_u2_fast();
1862       const u2 end_pc = cfs->get_u2_fast();
1863       const u2 handler_pc = cfs->get_u2_fast();
1864       const u2 catch_type_index = cfs->get_u2_fast();
1865       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1866                          "Illegal exception table range in class file %s",
1867                          CHECK_NULL);
1868       guarantee_property(handler_pc < code_length,
1869                          "Illegal exception table handler in class file %s",
1870                          CHECK_NULL);
1871       if (catch_type_index != 0) {
1872         guarantee_property(valid_klass_reference_at(catch_type_index),
1873                            "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1874       }
1875     }
1876   } else {
1877     cfs->skip_u2_fast(exception_table_length * 4);
1878   }
1879   return exception_table_start;
1880 }
1881 
1882 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1883                                              u4 code_length,
1884                                              CompressedLineNumberWriteStream**const write_stream,
1885                                              TRAPS) {
1886 
1887   const ClassFileStream* const cfs = _stream;
1888   unsigned int num_entries = cfs->get_u2(CHECK);
1889 
1890   // Each entry is a u2 start_pc, and a u2 line_number
1891   const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1892 
1893   // Verify line number attribute and table length
1894   check_property(
1895     code_attribute_length == sizeof(u2) + length_in_bytes,
1896     "LineNumberTable attribute has wrong length in class file %s", CHECK);
1897 
1898   cfs->guarantee_more(length_in_bytes, CHECK);
1899 
1900   if ((*write_stream) == NULL) {
1901     if (length_in_bytes > fixed_buffer_size) {
1902       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1903     } else {
1904       (*write_stream) = new CompressedLineNumberWriteStream(
1905         _linenumbertable_buffer, fixed_buffer_size);
1906     }
1907   }
1908 
1909   while (num_entries-- > 0) {
1910     const u2 bci  = cfs->get_u2_fast(); // start_pc
1911     const u2 line = cfs->get_u2_fast(); // line_number
1912     guarantee_property(bci < code_length,
1913         "Invalid pc in LineNumberTable in class file %s", CHECK);
1914     (*write_stream)->write_pair(bci, line);
1915   }
1916 }
1917 
1918 
1919 class LVT_Hash : public AllStatic {
1920  public:
1921 
1922   static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1923   /*
1924    * 3-tuple start_bci/length/slot has to be unique key,
1925    * so the following comparison seems to be redundant:
1926    *       && elem->name_cp_index == entry->_elem->name_cp_index
1927    */
1928     return (e0.start_bci     == e1.start_bci &&
1929             e0.length        == e1.length &&
1930             e0.name_cp_index == e1.name_cp_index &&
1931             e0.slot          == e1.slot);
1932   }
1933 
1934   static unsigned int hash(LocalVariableTableElement const& e0) {
1935     unsigned int raw_hash = e0.start_bci;
1936 
1937     raw_hash = e0.length        + raw_hash * 37;
1938     raw_hash = e0.name_cp_index + raw_hash * 37;
1939     raw_hash = e0.slot          + raw_hash * 37;
1940 
1941     return raw_hash;
1942   }
1943 };
1944 
1945 
1946 // Class file LocalVariableTable elements.
1947 class Classfile_LVT_Element {
1948  public:
1949   u2 start_bci;
1950   u2 length;
1951   u2 name_cp_index;
1952   u2 descriptor_cp_index;
1953   u2 slot;
1954 };
1955 
1956 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1957                              LocalVariableTableElement* const lvt) {
1958   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
1959   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
1960   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1961   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1962   lvt->signature_cp_index  = 0;
1963   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
1964 }
1965 
1966 // Function is used to parse both attributes:
1967 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1968 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1969                                                                              u4 code_length,
1970                                                                              u2 max_locals,
1971                                                                              u4 code_attribute_length,
1972                                                                              u2* const localvariable_table_length,
1973                                                                              bool isLVTT,
1974                                                                              TRAPS) {
1975   const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1976   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1977   const unsigned int size =
1978     (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1979 
1980   const ConstantPool* const cp = _cp;
1981 
1982   // Verify local variable table attribute has right length
1983   if (_need_verify) {
1984     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1985                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1986   }
1987 
1988   const unsafe_u2* const localvariable_table_start = cfs->current();
1989   assert(localvariable_table_start != NULL, "null local variable table");
1990   if (!_need_verify) {
1991     cfs->skip_u2_fast(size);
1992   } else {
1993     cfs->guarantee_more(size * 2, CHECK_NULL);
1994     for(int i = 0; i < (*localvariable_table_length); i++) {
1995       const u2 start_pc = cfs->get_u2_fast();
1996       const u2 length = cfs->get_u2_fast();
1997       const u2 name_index = cfs->get_u2_fast();
1998       const u2 descriptor_index = cfs->get_u2_fast();
1999       const u2 index = cfs->get_u2_fast();
2000       // Assign to a u4 to avoid overflow
2001       const u4 end_pc = (u4)start_pc + (u4)length;
2002 
2003       if (start_pc >= code_length) {
2004         classfile_parse_error(
2005           "Invalid start_pc %u in %s in class file %s",
2006           start_pc, tbl_name, CHECK_NULL);
2007       }
2008       if (end_pc > code_length) {
2009         classfile_parse_error(
2010           "Invalid length %u in %s in class file %s",
2011           length, tbl_name, CHECK_NULL);
2012       }
2013       const int cp_size = cp->length();
2014       guarantee_property(valid_symbol_at(name_index),
2015         "Name index %u in %s has bad constant type in class file %s",
2016         name_index, tbl_name, CHECK_NULL);
2017       guarantee_property(valid_symbol_at(descriptor_index),
2018         "Signature index %u in %s has bad constant type in class file %s",
2019         descriptor_index, tbl_name, CHECK_NULL);
2020 
2021       const Symbol* const name = cp->symbol_at(name_index);
2022       const Symbol* const sig = cp->symbol_at(descriptor_index);
2023       verify_legal_field_name(name, CHECK_NULL);
2024       u2 extra_slot = 0;
2025       if (!isLVTT) {
2026         verify_legal_field_signature(name, sig, CHECK_NULL);
2027 
2028         // 4894874: check special cases for double and long local variables
2029         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
2030             sig == vmSymbols::type_signature(T_LONG)) {
2031           extra_slot = 1;
2032         }
2033       }
2034       guarantee_property((index + extra_slot) < max_locals,
2035                           "Invalid index %u in %s in class file %s",
2036                           index, tbl_name, CHECK_NULL);
2037     }
2038   }
2039   return localvariable_table_start;
2040 }
2041 
2042 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
2043                                       u4 code_attribute_length,
2044                                       bool need_verify,
2045                                       TRAPS) {
2046   assert(cfs != NULL, "invariant");
2047 
2048   if (0 == code_attribute_length) {
2049     return NULL;
2050   }
2051 
2052   const u1* const stackmap_table_start = cfs->current();
2053   assert(stackmap_table_start != NULL, "null stackmap table");
2054 
2055   // check code_attribute_length first
2056   cfs->skip_u1(code_attribute_length, CHECK_NULL);
2057 
2058   if (!need_verify && !DumpSharedSpaces) {
2059     return NULL;
2060   }
2061   return stackmap_table_start;
2062 }
2063 
2064 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2065                                                                             u2* const checked_exceptions_length,
2066                                                                             u4 method_attribute_length,
2067                                                                             TRAPS) {
2068   assert(cfs != NULL, "invariant");
2069   assert(checked_exceptions_length != NULL, "invariant");
2070 
2071   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
2072   *checked_exceptions_length = cfs->get_u2_fast();
2073   const unsigned int size =
2074     (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2075   const unsafe_u2* const checked_exceptions_start = cfs->current();
2076   assert(checked_exceptions_start != NULL, "null checked exceptions");
2077   if (!_need_verify) {
2078     cfs->skip_u2_fast(size);
2079   } else {
2080     // Verify each value in the checked exception table
2081     u2 checked_exception;
2082     const u2 len = *checked_exceptions_length;
2083     cfs->guarantee_more(2 * len, CHECK_NULL);
2084     for (int i = 0; i < len; i++) {
2085       checked_exception = cfs->get_u2_fast();
2086       check_property(
2087         valid_klass_reference_at(checked_exception),
2088         "Exception name has bad type at constant pool %u in class file %s",
2089         checked_exception, CHECK_NULL);
2090     }
2091   }
2092   // check exceptions attribute length
2093   if (_need_verify) {
2094     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2095                                                    sizeof(u2) * size),
2096                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2097   }
2098   return checked_exceptions_start;
2099 }
2100 
2101 void ClassFileParser::throwIllegalSignature(const char* type,
2102                                             const Symbol* name,
2103                                             const Symbol* sig,
2104                                             TRAPS) const {
2105   assert(name != NULL, "invariant");
2106   assert(sig != NULL, "invariant");
2107 
2108   const char* class_note = "";
2109   if (is_value_type() && name == vmSymbols::object_initializer_name()) {
2110     class_note = " (an inline class)";
2111   }
2112 
2113   ResourceMark rm(THREAD);
2114   Exceptions::fthrow(THREAD_AND_LOCATION,
2115       vmSymbols::java_lang_ClassFormatError(),
2116       "%s \"%s\" in class %s%s has illegal signature \"%s\"", type,
2117       name->as_C_string(), _class_name->as_C_string(), class_note, sig->as_C_string());
2118 }
2119 
2120 AnnotationCollector::ID
2121 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2122                                       const Symbol* name) {
2123   const vmSymbols::SID sid = vmSymbols::find_sid(name);
2124   // Privileged code can use all annotations.  Other code silently drops some.
2125   const bool privileged = loader_data->is_the_null_class_loader_data() ||
2126                           loader_data->is_platform_class_loader_data() ||
2127                           loader_data->is_unsafe_anonymous();
2128   switch (sid) {
2129     case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2130       if (_location != _in_method)  break;  // only allow for methods
2131       if (!privileged)              break;  // only allow in privileged code
2132       return _method_CallerSensitive;
2133     }
2134     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2135       if (_location != _in_method)  break;  // only allow for methods
2136       if (!privileged)              break;  // only allow in privileged code
2137       return _method_ForceInline;
2138     }
2139     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2140       if (_location != _in_method)  break;  // only allow for methods
2141       if (!privileged)              break;  // only allow in privileged code
2142       return _method_DontInline;
2143     }
2144     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2145       if (_location != _in_method)  break;  // only allow for methods
2146       if (!privileged)              break;  // only allow in privileged code
2147       return _method_InjectedProfile;
2148     }
2149     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2150       if (_location != _in_method)  break;  // only allow for methods
2151       if (!privileged)              break;  // only allow in privileged code
2152       return _method_LambdaForm_Compiled;
2153     }
2154     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2155       if (_location != _in_method)  break;  // only allow for methods
2156       if (!privileged)              break;  // only allow in privileged code
2157       return _method_Hidden;
2158     }
2159     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2160       if (_location != _in_method)  break;  // only allow for methods
2161       if (!privileged)              break;  // only allow in privileged code
2162       return _method_HotSpotIntrinsicCandidate;
2163     }
2164     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2165       if (_location != _in_field)   break;  // only allow for fields
2166       if (!privileged)              break;  // only allow in privileged code
2167       return _field_Stable;
2168     }
2169     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2170       if (_location != _in_field && _location != _in_class) {
2171         break;  // only allow for fields and classes
2172       }
2173       if (!EnableContended || (RestrictContended && !privileged)) {
2174         break;  // honor privileges
2175       }
2176       return _jdk_internal_vm_annotation_Contended;
2177     }
2178     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2179       if (_location != _in_method)  break;  // only allow for methods
2180       if (RestrictReservedStack && !privileged) break; // honor privileges
2181       return _jdk_internal_vm_annotation_ReservedStackAccess;
2182     }
2183     default: {
2184       break;
2185     }
2186   }
2187   return AnnotationCollector::_unknown;
2188 }
2189 
2190 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2191   if (is_contended())
2192     f->set_contended_group(contended_group());
2193   if (is_stable())
2194     f->set_stable(true);
2195 }
2196 
2197 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2198   // If there's an error deallocate metadata for field annotations
2199   MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2200   MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2201 }
2202 
2203 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2204   if (has_annotation(_method_CallerSensitive))
2205     m->set_caller_sensitive(true);
2206   if (has_annotation(_method_ForceInline))
2207     m->set_force_inline(true);
2208   if (has_annotation(_method_DontInline))
2209     m->set_dont_inline(true);
2210   if (has_annotation(_method_InjectedProfile))
2211     m->set_has_injected_profile(true);
2212   if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2213     m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2214   if (has_annotation(_method_Hidden))
2215     m->set_hidden(true);
2216   if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2217     m->set_intrinsic_candidate(true);
2218   if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2219     m->set_has_reserved_stack_access(true);
2220 }
2221 
2222 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2223   assert(ik != NULL, "invariant");
2224   ik->set_is_contended(is_contended());
2225 }
2226 
2227 #define MAX_ARGS_SIZE 255
2228 #define MAX_CODE_SIZE 65535
2229 #define INITIAL_MAX_LVT_NUMBER 256
2230 
2231 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2232  *
2233  * Rules for LVT's and LVTT's are:
2234  *   - There can be any number of LVT's and LVTT's.
2235  *   - If there are n LVT's, it is the same as if there was just
2236  *     one LVT containing all the entries from the n LVT's.
2237  *   - There may be no more than one LVT entry per local variable.
2238  *     Two LVT entries are 'equal' if these fields are the same:
2239  *        start_pc, length, name, slot
2240  *   - There may be no more than one LVTT entry per each LVT entry.
2241  *     Each LVTT entry has to match some LVT entry.
2242  *   - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2243  */
2244 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2245                                                int lvt_cnt,
2246                                                u2* const localvariable_table_length,
2247                                                const unsafe_u2** const localvariable_table_start,
2248                                                int lvtt_cnt,
2249                                                u2* const localvariable_type_table_length,
2250                                                const unsafe_u2** const localvariable_type_table_start,
2251                                                TRAPS) {
2252 
2253   ResourceMark rm(THREAD);
2254 
2255   typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2256                             &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2257 
2258   LVT_HashTable* const table = new LVT_HashTable();
2259 
2260   // To fill LocalVariableTable in
2261   const Classfile_LVT_Element* cf_lvt;
2262   LocalVariableTableElement* lvt = cm->localvariable_table_start();
2263 
2264   for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2265     cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2266     for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2267       copy_lvt_element(&cf_lvt[idx], lvt);
2268       // If no duplicates, add LVT elem in hashtable.
2269       if (table->put(*lvt, lvt) == false
2270           && _need_verify
2271           && _major_version >= JAVA_1_5_VERSION) {
2272         classfile_parse_error("Duplicated LocalVariableTable attribute "
2273                               "entry for '%s' in class file %s",
2274                                _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2275                                CHECK);
2276       }
2277     }
2278   }
2279 
2280   // To merge LocalVariableTable and LocalVariableTypeTable
2281   const Classfile_LVT_Element* cf_lvtt;
2282   LocalVariableTableElement lvtt_elem;
2283 
2284   for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2285     cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2286     for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2287       copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2288       LocalVariableTableElement** entry = table->get(lvtt_elem);
2289       if (entry == NULL) {
2290         if (_need_verify) {
2291           classfile_parse_error("LVTT entry for '%s' in class file %s "
2292                                 "does not match any LVT entry",
2293                                  _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2294                                  CHECK);
2295         }
2296       } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2297         classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2298                               "entry for '%s' in class file %s",
2299                                _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2300                                CHECK);
2301       } else {
2302         // to add generic signatures into LocalVariableTable
2303         (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2304       }
2305     }
2306   }
2307 }
2308 
2309 
2310 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2311                                        const u1* runtime_visible_annotations,
2312                                        int runtime_visible_annotations_length,
2313                                        const u1* runtime_invisible_annotations,
2314                                        int runtime_invisible_annotations_length,
2315                                        const u1* runtime_visible_parameter_annotations,
2316                                        int runtime_visible_parameter_annotations_length,
2317                                        const u1* runtime_invisible_parameter_annotations,
2318                                        int runtime_invisible_parameter_annotations_length,
2319                                        const u1* runtime_visible_type_annotations,
2320                                        int runtime_visible_type_annotations_length,
2321                                        const u1* runtime_invisible_type_annotations,
2322                                        int runtime_invisible_type_annotations_length,
2323                                        const u1* annotation_default,
2324                                        int annotation_default_length,
2325                                        TRAPS) {
2326 
2327   AnnotationArray* a;
2328 
2329   if (runtime_visible_annotations_length +
2330       runtime_invisible_annotations_length > 0) {
2331      a = assemble_annotations(runtime_visible_annotations,
2332                               runtime_visible_annotations_length,
2333                               runtime_invisible_annotations,
2334                               runtime_invisible_annotations_length,
2335                               CHECK);
2336      cm->set_method_annotations(a);
2337   }
2338 
2339   if (runtime_visible_parameter_annotations_length +
2340       runtime_invisible_parameter_annotations_length > 0) {
2341     a = assemble_annotations(runtime_visible_parameter_annotations,
2342                              runtime_visible_parameter_annotations_length,
2343                              runtime_invisible_parameter_annotations,
2344                              runtime_invisible_parameter_annotations_length,
2345                              CHECK);
2346     cm->set_parameter_annotations(a);
2347   }
2348 
2349   if (annotation_default_length > 0) {
2350     a = assemble_annotations(annotation_default,
2351                              annotation_default_length,
2352                              NULL,
2353                              0,
2354                              CHECK);
2355     cm->set_default_annotations(a);
2356   }
2357 
2358   if (runtime_visible_type_annotations_length +
2359       runtime_invisible_type_annotations_length > 0) {
2360     a = assemble_annotations(runtime_visible_type_annotations,
2361                              runtime_visible_type_annotations_length,
2362                              runtime_invisible_type_annotations,
2363                              runtime_invisible_type_annotations_length,
2364                              CHECK);
2365     cm->set_type_annotations(a);
2366   }
2367 }
2368 
2369 
2370 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2371 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2372 // Method* to save footprint, so we only know the size of the resulting Method* when the
2373 // entire method attribute is parsed.
2374 //
2375 // The promoted_flags parameter is used to pass relevant access_flags
2376 // from the method back up to the containing klass. These flag values
2377 // are added to klass's access_flags.
2378 
2379 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2380                                       bool is_interface,
2381                                       bool is_value_type,
2382                                       const ConstantPool* cp,
2383                                       AccessFlags* const promoted_flags,
2384                                       TRAPS) {
2385   assert(cfs != NULL, "invariant");
2386   assert(cp != NULL, "invariant");
2387   assert(promoted_flags != NULL, "invariant");
2388 
2389   ResourceMark rm(THREAD);
2390   // Parse fixed parts:
2391   // access_flags, name_index, descriptor_index, attributes_count
2392   cfs->guarantee_more(8, CHECK_NULL);
2393 
2394   int flags = cfs->get_u2_fast();
2395   const u2 name_index = cfs->get_u2_fast();
2396   const int cp_size = cp->length();
2397   check_property(
2398     valid_symbol_at(name_index),
2399     "Illegal constant pool index %u for method name in class file %s",
2400     name_index, CHECK_NULL);
2401   const Symbol* const name = cp->symbol_at(name_index);
2402   verify_legal_method_name(name, CHECK_NULL);
2403 
2404   const u2 signature_index = cfs->get_u2_fast();
2405   guarantee_property(
2406     valid_symbol_at(signature_index),
2407     "Illegal constant pool index %u for method signature in class file %s",
2408     signature_index, CHECK_NULL);
2409   const Symbol* const signature = cp->symbol_at(signature_index);
2410 
2411   if (name == vmSymbols::class_initializer_name()) {
2412     // We ignore the other access flags for a valid class initializer.
2413     // (JVM Spec 2nd ed., chapter 4.6)
2414     if (_major_version < 51) { // backward compatibility
2415       flags = JVM_ACC_STATIC;
2416     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2417       flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2418     } else {
2419       classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2420     }
2421   } else {
2422     verify_legal_method_modifiers(flags, is_interface, is_value_type, name, CHECK_NULL);
2423   }
2424 
2425   if (name == vmSymbols::object_initializer_name()) {
2426     if (is_interface) {
2427       classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2428     } else if (!is_value_type && signature->is_void_method_signature()) {
2429       // OK, a constructor
2430     } else if (is_value_type && !signature->is_void_method_signature()) {
2431       // also OK, a static factory, as long as the return value is good
2432       bool ok = false;
2433       SignatureStream ss((Symbol*) signature, true);
2434       while (!ss.at_return_type())  ss.next();
2435       if (ss.is_object()) {
2436         TempNewSymbol ret = ss.as_symbol_or_null();
2437         const Symbol* required = class_name();
2438         if (is_unsafe_anonymous()) {
2439           // The original class name in the UAC byte stream gets changed.  So
2440           // using the original name in the return type is no longer valid.
2441           required = vmSymbols::java_lang_Object();
2442         }
2443         ok = (ret == required);
2444       }
2445       if (!ok) {
2446         throwIllegalSignature("Method", name, signature, CHECK_0);
2447       }
2448     } else {
2449       // not OK, so throw the same error as in verify_legal_method_signature.
2450       throwIllegalSignature("Method", name, signature, CHECK_0);
2451     }
2452     // A declared <init> method must always be either a non-static
2453     // object constructor, with a void return, or else it must be a
2454     // static factory method, with a non-void return.  No other
2455     // definition of <init> is possible.
2456     //
2457     // The verifier (in verify_invoke_instructions) will inspect the
2458     // signature of any attempt to invoke <init>, and ensures that it
2459     // returns non-void if and only if it is being invoked by
2460     // invokestatic, and void if and only if it is being invoked by
2461     // invokespecial.
2462     //
2463     // When a symbolic reference to <init> is resolved for a
2464     // particular invocation mode (special or static), the mode is
2465     // matched to the JVM_ACC_STATIC modifier of the <init> method.
2466     // Thus, it is impossible to statically invoke a constructor, and
2467     // impossible to "new + invokespecial" a static factory, either
2468     // through bytecode or through reflection.
2469   }
2470 
2471   int args_size = -1;  // only used when _need_verify is true
2472   if (_need_verify) {
2473     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2474                  verify_legal_method_signature(name, signature, CHECK_NULL);
2475     if (args_size > MAX_ARGS_SIZE) {
2476       classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2477     }
2478   }
2479 
2480   AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2481 
2482   // Default values for code and exceptions attribute elements
2483   u2 max_stack = 0;
2484   u2 max_locals = 0;
2485   u4 code_length = 0;
2486   const u1* code_start = 0;
2487   u2 exception_table_length = 0;
2488   const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2489   Array<int>* exception_handlers = Universe::the_empty_int_array();
2490   u2 checked_exceptions_length = 0;
2491   const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2492   CompressedLineNumberWriteStream* linenumber_table = NULL;
2493   int linenumber_table_length = 0;
2494   int total_lvt_length = 0;
2495   u2 lvt_cnt = 0;
2496   u2 lvtt_cnt = 0;
2497   bool lvt_allocated = false;
2498   u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2499   u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2500   u2* localvariable_table_length = NULL;
2501   const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2502   u2* localvariable_type_table_length = NULL;
2503   const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2504   int method_parameters_length = -1;
2505   const u1* method_parameters_data = NULL;
2506   bool method_parameters_seen = false;
2507   bool parsed_code_attribute = false;
2508   bool parsed_checked_exceptions_attribute = false;
2509   bool parsed_stackmap_attribute = false;
2510   // stackmap attribute - JDK1.5
2511   const u1* stackmap_data = NULL;
2512   int stackmap_data_length = 0;
2513   u2 generic_signature_index = 0;
2514   MethodAnnotationCollector parsed_annotations;
2515   const u1* runtime_visible_annotations = NULL;
2516   int runtime_visible_annotations_length = 0;
2517   const u1* runtime_invisible_annotations = NULL;
2518   int runtime_invisible_annotations_length = 0;
2519   const u1* runtime_visible_parameter_annotations = NULL;
2520   int runtime_visible_parameter_annotations_length = 0;
2521   const u1* runtime_invisible_parameter_annotations = NULL;
2522   int runtime_invisible_parameter_annotations_length = 0;
2523   const u1* runtime_visible_type_annotations = NULL;
2524   int runtime_visible_type_annotations_length = 0;
2525   const u1* runtime_invisible_type_annotations = NULL;
2526   int runtime_invisible_type_annotations_length = 0;
2527   bool runtime_invisible_annotations_exists = false;
2528   bool runtime_invisible_type_annotations_exists = false;
2529   bool runtime_invisible_parameter_annotations_exists = false;
2530   const u1* annotation_default = NULL;
2531   int annotation_default_length = 0;
2532 
2533   // Parse code and exceptions attribute
2534   u2 method_attributes_count = cfs->get_u2_fast();
2535   while (method_attributes_count--) {
2536     cfs->guarantee_more(6, CHECK_NULL);  // method_attribute_name_index, method_attribute_length
2537     const u2 method_attribute_name_index = cfs->get_u2_fast();
2538     const u4 method_attribute_length = cfs->get_u4_fast();
2539     check_property(
2540       valid_symbol_at(method_attribute_name_index),
2541       "Invalid method attribute name index %u in class file %s",
2542       method_attribute_name_index, CHECK_NULL);
2543 
2544     const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2545     if (method_attribute_name == vmSymbols::tag_code()) {
2546       // Parse Code attribute
2547       if (_need_verify) {
2548         guarantee_property(
2549             !access_flags.is_native() && !access_flags.is_abstract(),
2550                         "Code attribute in native or abstract methods in class file %s",
2551                          CHECK_NULL);
2552       }
2553       if (parsed_code_attribute) {
2554         classfile_parse_error("Multiple Code attributes in class file %s",
2555                               CHECK_NULL);
2556       }
2557       parsed_code_attribute = true;
2558 
2559       // Stack size, locals size, and code size
2560       if (_major_version == 45 && _minor_version <= 2) {
2561         cfs->guarantee_more(4, CHECK_NULL);
2562         max_stack = cfs->get_u1_fast();
2563         max_locals = cfs->get_u1_fast();
2564         code_length = cfs->get_u2_fast();
2565       } else {
2566         cfs->guarantee_more(8, CHECK_NULL);
2567         max_stack = cfs->get_u2_fast();
2568         max_locals = cfs->get_u2_fast();
2569         code_length = cfs->get_u4_fast();
2570       }
2571       if (_need_verify) {
2572         guarantee_property(args_size <= max_locals,
2573                            "Arguments can't fit into locals in class file %s",
2574                            CHECK_NULL);
2575         guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2576                            "Invalid method Code length %u in class file %s",
2577                            code_length, CHECK_NULL);
2578       }
2579       // Code pointer
2580       code_start = cfs->current();
2581       assert(code_start != NULL, "null code start");
2582       cfs->guarantee_more(code_length, CHECK_NULL);
2583       cfs->skip_u1_fast(code_length);
2584 
2585       // Exception handler table
2586       cfs->guarantee_more(2, CHECK_NULL);  // exception_table_length
2587       exception_table_length = cfs->get_u2_fast();
2588       if (exception_table_length > 0) {
2589         exception_table_start = parse_exception_table(cfs,
2590                                                       code_length,
2591                                                       exception_table_length,
2592                                                       CHECK_NULL);
2593       }
2594 
2595       // Parse additional attributes in code attribute
2596       cfs->guarantee_more(2, CHECK_NULL);  // code_attributes_count
2597       u2 code_attributes_count = cfs->get_u2_fast();
2598 
2599       unsigned int calculated_attribute_length = 0;
2600 
2601       if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2602         calculated_attribute_length =
2603             sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2604       } else {
2605         // max_stack, locals and length are smaller in pre-version 45.2 classes
2606         calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2607       }
2608       calculated_attribute_length +=
2609         code_length +
2610         sizeof(exception_table_length) +
2611         sizeof(code_attributes_count) +
2612         exception_table_length *
2613             ( sizeof(u2) +   // start_pc
2614               sizeof(u2) +   // end_pc
2615               sizeof(u2) +   // handler_pc
2616               sizeof(u2) );  // catch_type_index
2617 
2618       while (code_attributes_count--) {
2619         cfs->guarantee_more(6, CHECK_NULL);  // code_attribute_name_index, code_attribute_length
2620         const u2 code_attribute_name_index = cfs->get_u2_fast();
2621         const u4 code_attribute_length = cfs->get_u4_fast();
2622         calculated_attribute_length += code_attribute_length +
2623                                        sizeof(code_attribute_name_index) +
2624                                        sizeof(code_attribute_length);
2625         check_property(valid_symbol_at(code_attribute_name_index),
2626                        "Invalid code attribute name index %u in class file %s",
2627                        code_attribute_name_index,
2628                        CHECK_NULL);
2629         if (LoadLineNumberTables &&
2630             cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2631           // Parse and compress line number table
2632           parse_linenumber_table(code_attribute_length,
2633                                  code_length,
2634                                  &linenumber_table,
2635                                  CHECK_NULL);
2636 
2637         } else if (LoadLocalVariableTables &&
2638                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2639           // Parse local variable table
2640           if (!lvt_allocated) {
2641             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2642               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2643             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2644               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2645             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2646               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2647             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2648               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2649             lvt_allocated = true;
2650           }
2651           if (lvt_cnt == max_lvt_cnt) {
2652             max_lvt_cnt <<= 1;
2653             localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2654             localvariable_table_start  = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2655           }
2656           localvariable_table_start[lvt_cnt] =
2657             parse_localvariable_table(cfs,
2658                                       code_length,
2659                                       max_locals,
2660                                       code_attribute_length,
2661                                       &localvariable_table_length[lvt_cnt],
2662                                       false,    // is not LVTT
2663                                       CHECK_NULL);
2664           total_lvt_length += localvariable_table_length[lvt_cnt];
2665           lvt_cnt++;
2666         } else if (LoadLocalVariableTypeTables &&
2667                    _major_version >= JAVA_1_5_VERSION &&
2668                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2669           if (!lvt_allocated) {
2670             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2671               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2672             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2673               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2674             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2675               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2676             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2677               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2678             lvt_allocated = true;
2679           }
2680           // Parse local variable type table
2681           if (lvtt_cnt == max_lvtt_cnt) {
2682             max_lvtt_cnt <<= 1;
2683             localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2684             localvariable_type_table_start  = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2685           }
2686           localvariable_type_table_start[lvtt_cnt] =
2687             parse_localvariable_table(cfs,
2688                                       code_length,
2689                                       max_locals,
2690                                       code_attribute_length,
2691                                       &localvariable_type_table_length[lvtt_cnt],
2692                                       true,     // is LVTT
2693                                       CHECK_NULL);
2694           lvtt_cnt++;
2695         } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2696                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2697           // Stack map is only needed by the new verifier in JDK1.5.
2698           if (parsed_stackmap_attribute) {
2699             classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2700           }
2701           stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2702           stackmap_data_length = code_attribute_length;
2703           parsed_stackmap_attribute = true;
2704         } else {
2705           // Skip unknown attributes
2706           cfs->skip_u1(code_attribute_length, CHECK_NULL);
2707         }
2708       }
2709       // check method attribute length
2710       if (_need_verify) {
2711         guarantee_property(method_attribute_length == calculated_attribute_length,
2712                            "Code segment has wrong length in class file %s",
2713                            CHECK_NULL);
2714       }
2715     } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2716       // Parse Exceptions attribute
2717       if (parsed_checked_exceptions_attribute) {
2718         classfile_parse_error("Multiple Exceptions attributes in class file %s",
2719                               CHECK_NULL);
2720       }
2721       parsed_checked_exceptions_attribute = true;
2722       checked_exceptions_start =
2723             parse_checked_exceptions(cfs,
2724                                      &checked_exceptions_length,
2725                                      method_attribute_length,
2726                                      CHECK_NULL);
2727     } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2728       // reject multiple method parameters
2729       if (method_parameters_seen) {
2730         classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2731                               CHECK_NULL);
2732       }
2733       method_parameters_seen = true;
2734       method_parameters_length = cfs->get_u1_fast();
2735       const u2 real_length = (method_parameters_length * 4u) + 1u;
2736       if (method_attribute_length != real_length) {
2737         classfile_parse_error(
2738           "Invalid MethodParameters method attribute length %u in class file",
2739           method_attribute_length, CHECK_NULL);
2740       }
2741       method_parameters_data = cfs->current();
2742       cfs->skip_u2_fast(method_parameters_length);
2743       cfs->skip_u2_fast(method_parameters_length);
2744       // ignore this attribute if it cannot be reflected
2745       if (!SystemDictionary::Parameter_klass_loaded())
2746         method_parameters_length = -1;
2747     } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2748       if (method_attribute_length != 0) {
2749         classfile_parse_error(
2750           "Invalid Synthetic method attribute length %u in class file %s",
2751           method_attribute_length, CHECK_NULL);
2752       }
2753       // Should we check that there hasn't already been a synthetic attribute?
2754       access_flags.set_is_synthetic();
2755     } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2756       if (method_attribute_length != 0) {
2757         classfile_parse_error(
2758           "Invalid Deprecated method attribute length %u in class file %s",
2759           method_attribute_length, CHECK_NULL);
2760       }
2761     } else if (_major_version >= JAVA_1_5_VERSION) {
2762       if (method_attribute_name == vmSymbols::tag_signature()) {
2763         if (generic_signature_index != 0) {
2764           classfile_parse_error(
2765             "Multiple Signature attributes for method in class file %s",
2766             CHECK_NULL);
2767         }
2768         if (method_attribute_length != 2) {
2769           classfile_parse_error(
2770             "Invalid Signature attribute length %u in class file %s",
2771             method_attribute_length, CHECK_NULL);
2772         }
2773         generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2774       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2775         if (runtime_visible_annotations != NULL) {
2776           classfile_parse_error(
2777             "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2778             CHECK_NULL);
2779         }
2780         runtime_visible_annotations_length = method_attribute_length;
2781         runtime_visible_annotations = cfs->current();
2782         assert(runtime_visible_annotations != NULL, "null visible annotations");
2783         cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2784         parse_annotations(cp,
2785                           runtime_visible_annotations,
2786                           runtime_visible_annotations_length,
2787                           &parsed_annotations,
2788                           _loader_data,
2789                           CHECK_NULL);
2790         cfs->skip_u1_fast(runtime_visible_annotations_length);
2791       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2792         if (runtime_invisible_annotations_exists) {
2793           classfile_parse_error(
2794             "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2795             CHECK_NULL);
2796         }
2797         runtime_invisible_annotations_exists = true;
2798         if (PreserveAllAnnotations) {
2799           runtime_invisible_annotations_length = method_attribute_length;
2800           runtime_invisible_annotations = cfs->current();
2801           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2802         }
2803         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2804       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2805         if (runtime_visible_parameter_annotations != NULL) {
2806           classfile_parse_error(
2807             "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2808             CHECK_NULL);
2809         }
2810         runtime_visible_parameter_annotations_length = method_attribute_length;
2811         runtime_visible_parameter_annotations = cfs->current();
2812         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2813         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2814       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2815         if (runtime_invisible_parameter_annotations_exists) {
2816           classfile_parse_error(
2817             "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2818             CHECK_NULL);
2819         }
2820         runtime_invisible_parameter_annotations_exists = true;
2821         if (PreserveAllAnnotations) {
2822           runtime_invisible_parameter_annotations_length = method_attribute_length;
2823           runtime_invisible_parameter_annotations = cfs->current();
2824           assert(runtime_invisible_parameter_annotations != NULL,
2825             "null invisible parameter annotations");
2826         }
2827         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2828       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2829         if (annotation_default != NULL) {
2830           classfile_parse_error(
2831             "Multiple AnnotationDefault attributes for method in class file %s",
2832             CHECK_NULL);
2833         }
2834         annotation_default_length = method_attribute_length;
2835         annotation_default = cfs->current();
2836         assert(annotation_default != NULL, "null annotation default");
2837         cfs->skip_u1(annotation_default_length, CHECK_NULL);
2838       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2839         if (runtime_visible_type_annotations != NULL) {
2840           classfile_parse_error(
2841             "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2842             CHECK_NULL);
2843         }
2844         runtime_visible_type_annotations_length = method_attribute_length;
2845         runtime_visible_type_annotations = cfs->current();
2846         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2847         // No need for the VM to parse Type annotations
2848         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2849       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2850         if (runtime_invisible_type_annotations_exists) {
2851           classfile_parse_error(
2852             "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2853             CHECK_NULL);
2854         } else {
2855           runtime_invisible_type_annotations_exists = true;
2856         }
2857         if (PreserveAllAnnotations) {
2858           runtime_invisible_type_annotations_length = method_attribute_length;
2859           runtime_invisible_type_annotations = cfs->current();
2860           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2861         }
2862         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2863       } else {
2864         // Skip unknown attributes
2865         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2866       }
2867     } else {
2868       // Skip unknown attributes
2869       cfs->skip_u1(method_attribute_length, CHECK_NULL);
2870     }
2871   }
2872 
2873   if (linenumber_table != NULL) {
2874     linenumber_table->write_terminator();
2875     linenumber_table_length = linenumber_table->position();
2876   }
2877 
2878   // Make sure there's at least one Code attribute in non-native/non-abstract method
2879   if (_need_verify) {
2880     guarantee_property(access_flags.is_native() ||
2881                        access_flags.is_abstract() ||
2882                        parsed_code_attribute,
2883                        "Absent Code attribute in method that is not native or abstract in class file %s",
2884                        CHECK_NULL);
2885   }
2886 
2887   // All sizing information for a Method* is finally available, now create it
2888   InlineTableSizes sizes(
2889       total_lvt_length,
2890       linenumber_table_length,
2891       exception_table_length,
2892       checked_exceptions_length,
2893       method_parameters_length,
2894       generic_signature_index,
2895       runtime_visible_annotations_length +
2896            runtime_invisible_annotations_length,
2897       runtime_visible_parameter_annotations_length +
2898            runtime_invisible_parameter_annotations_length,
2899       runtime_visible_type_annotations_length +
2900            runtime_invisible_type_annotations_length,
2901       annotation_default_length,
2902       0);
2903 
2904   Method* const m = Method::allocate(_loader_data,
2905                                      code_length,
2906                                      access_flags,
2907                                      &sizes,
2908                                      ConstMethod::NORMAL,
2909                                      CHECK_NULL);
2910 
2911   ClassLoadingService::add_class_method_size(m->size()*wordSize);
2912 
2913   // Fill in information from fixed part (access_flags already set)
2914   m->set_constants(_cp);
2915   m->set_name_index(name_index);
2916   m->set_signature_index(signature_index);
2917 
2918   ResultTypeFinder rtf(cp->symbol_at(signature_index));
2919   m->constMethod()->set_result_type(rtf.type());
2920 
2921   if (args_size >= 0) {
2922     m->set_size_of_parameters(args_size);
2923   } else {
2924     m->compute_size_of_parameters(THREAD);
2925   }
2926 #ifdef ASSERT
2927   if (args_size >= 0) {
2928     m->compute_size_of_parameters(THREAD);
2929     assert(args_size == m->size_of_parameters(), "");
2930   }
2931 #endif
2932 
2933   // Fill in code attribute information
2934   m->set_max_stack(max_stack);
2935   m->set_max_locals(max_locals);
2936   if (stackmap_data != NULL) {
2937     m->constMethod()->copy_stackmap_data(_loader_data,
2938                                          (u1*)stackmap_data,
2939                                          stackmap_data_length,
2940                                          CHECK_NULL);
2941   }
2942 
2943   // Copy byte codes
2944   m->set_code((u1*)code_start);
2945 
2946   // Copy line number table
2947   if (linenumber_table != NULL) {
2948     memcpy(m->compressed_linenumber_table(),
2949            linenumber_table->buffer(),
2950            linenumber_table_length);
2951   }
2952 
2953   // Copy exception table
2954   if (exception_table_length > 0) {
2955     Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2956                                                 m->exception_table_start(),
2957                                                 exception_table_length * sizeof(ExceptionTableElement),
2958                                                 sizeof(u2));
2959   }
2960 
2961   // Copy method parameters
2962   if (method_parameters_length > 0) {
2963     MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2964     for (int i = 0; i < method_parameters_length; i++) {
2965       elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2966       method_parameters_data += 2;
2967       elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2968       method_parameters_data += 2;
2969     }
2970   }
2971 
2972   // Copy checked exceptions
2973   if (checked_exceptions_length > 0) {
2974     Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2975                                                 m->checked_exceptions_start(),
2976                                                 checked_exceptions_length * sizeof(CheckedExceptionElement),
2977                                                 sizeof(u2));
2978   }
2979 
2980   // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2981   if (total_lvt_length > 0) {
2982     promoted_flags->set_has_localvariable_table();
2983     copy_localvariable_table(m->constMethod(),
2984                              lvt_cnt,
2985                              localvariable_table_length,
2986                              localvariable_table_start,
2987                              lvtt_cnt,
2988                              localvariable_type_table_length,
2989                              localvariable_type_table_start,
2990                              CHECK_NULL);
2991   }
2992 
2993   if (parsed_annotations.has_any_annotations())
2994     parsed_annotations.apply_to(m);
2995 
2996   // Copy annotations
2997   copy_method_annotations(m->constMethod(),
2998                           runtime_visible_annotations,
2999                           runtime_visible_annotations_length,
3000                           runtime_invisible_annotations,
3001                           runtime_invisible_annotations_length,
3002                           runtime_visible_parameter_annotations,
3003                           runtime_visible_parameter_annotations_length,
3004                           runtime_invisible_parameter_annotations,
3005                           runtime_invisible_parameter_annotations_length,
3006                           runtime_visible_type_annotations,
3007                           runtime_visible_type_annotations_length,
3008                           runtime_invisible_type_annotations,
3009                           runtime_invisible_type_annotations_length,
3010                           annotation_default,
3011                           annotation_default_length,
3012                           CHECK_NULL);
3013 
3014   if (name == vmSymbols::finalize_method_name() &&
3015       signature == vmSymbols::void_method_signature()) {
3016     if (m->is_empty_method()) {
3017       _has_empty_finalizer = true;
3018     } else {
3019       _has_finalizer = true;
3020     }
3021   }
3022   if (name == vmSymbols::object_initializer_name() &&
3023       signature == vmSymbols::void_method_signature() &&
3024       m->is_vanilla_constructor()) {
3025     _has_vanilla_constructor = true;
3026   }
3027 
3028   NOT_PRODUCT(m->verify());
3029   return m;
3030 }
3031 
3032 
3033 // The promoted_flags parameter is used to pass relevant access_flags
3034 // from the methods back up to the containing klass. These flag values
3035 // are added to klass's access_flags.
3036 // Side-effects: populates the _methods field in the parser
3037 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
3038                                     bool is_interface,
3039                                     bool is_value_type,
3040                                     AccessFlags* promoted_flags,
3041                                     bool* has_final_method,
3042                                     bool* declares_nonstatic_concrete_methods,
3043                                     TRAPS) {
3044   assert(cfs != NULL, "invariant");
3045   assert(promoted_flags != NULL, "invariant");
3046   assert(has_final_method != NULL, "invariant");
3047   assert(declares_nonstatic_concrete_methods != NULL, "invariant");
3048 
3049   assert(NULL == _methods, "invariant");
3050 
3051   cfs->guarantee_more(2, CHECK);  // length
3052   const u2 length = cfs->get_u2_fast();
3053   if (length == 0) {
3054     _methods = Universe::the_empty_method_array();
3055   } else {
3056     _methods = MetadataFactory::new_array<Method*>(_loader_data,
3057                                                    length,
3058                                                    NULL,
3059                                                    CHECK);
3060 
3061     for (int index = 0; index < length; index++) {
3062       Method* method = parse_method(cfs,
3063                                     is_interface,
3064                                     is_value_type,
3065                                     _cp,
3066                                     promoted_flags,
3067                                     CHECK);
3068 
3069       if (method->is_final()) {
3070         *has_final_method = true;
3071       }
3072       // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
3073       // used for interface initialization, and default method inheritance analysis
3074       if (is_interface && !(*declares_nonstatic_concrete_methods)
3075         && !method->is_abstract() && !method->is_static()) {
3076         *declares_nonstatic_concrete_methods = true;
3077       }
3078       _methods->at_put(index, method);
3079     }
3080 
3081     if (_need_verify && length > 1) {
3082       // Check duplicated methods
3083       ResourceMark rm(THREAD);
3084       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
3085         THREAD, NameSigHash*, HASH_ROW_SIZE);
3086       initialize_hashtable(names_and_sigs);
3087       bool dup = false;
3088       const Symbol* name = NULL;
3089       const Symbol* sig = NULL;
3090       {
3091         debug_only(NoSafepointVerifier nsv;)
3092         for (int i = 0; i < length; i++) {
3093           const Method* const m = _methods->at(i);
3094           name = m->name();
3095           sig = m->signature();
3096           // If no duplicates, add name/signature in hashtable names_and_sigs.
3097           if (!put_after_lookup(name, sig, names_and_sigs)) {
3098             dup = true;
3099             break;
3100           }
3101         }
3102       }
3103       if (dup) {
3104         classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
3105                                name->as_C_string(), sig->as_klass_external_name(), CHECK);
3106       }
3107     }
3108   }
3109 }
3110 
3111 static const intArray* sort_methods(Array<Method*>* methods) {
3112   const int length = methods->length();
3113   // If JVMTI original method ordering or sharing is enabled we have to
3114   // remember the original class file ordering.
3115   // We temporarily use the vtable_index field in the Method* to store the
3116   // class file index, so we can read in after calling qsort.
3117   // Put the method ordering in the shared archive.
3118   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3119     for (int index = 0; index < length; index++) {
3120       Method* const m = methods->at(index);
3121       assert(!m->valid_vtable_index(), "vtable index should not be set");
3122       m->set_vtable_index(index);
3123     }
3124   }
3125   // Sort method array by ascending method name (for faster lookups & vtable construction)
3126   // Note that the ordering is not alphabetical, see Symbol::fast_compare
3127   Method::sort_methods(methods);
3128 
3129   intArray* method_ordering = NULL;
3130   // If JVMTI original method ordering or sharing is enabled construct int
3131   // array remembering the original ordering
3132   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3133     method_ordering = new intArray(length, length, -1);
3134     for (int index = 0; index < length; index++) {
3135       Method* const m = methods->at(index);
3136       const int old_index = m->vtable_index();
3137       assert(old_index >= 0 && old_index < length, "invalid method index");
3138       method_ordering->at_put(index, old_index);
3139       m->set_vtable_index(Method::invalid_vtable_index);
3140     }
3141   }
3142   return method_ordering;
3143 }
3144 
3145 // Parse generic_signature attribute for methods and fields
3146 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3147                                                       TRAPS) {
3148   assert(cfs != NULL, "invariant");
3149 
3150   cfs->guarantee_more(2, CHECK_0);  // generic_signature_index
3151   const u2 generic_signature_index = cfs->get_u2_fast();
3152   check_property(
3153     valid_symbol_at(generic_signature_index),
3154     "Invalid Signature attribute at constant pool index %u in class file %s",
3155     generic_signature_index, CHECK_0);
3156   return generic_signature_index;
3157 }
3158 
3159 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3160                                                            TRAPS) {
3161 
3162   assert(cfs != NULL, "invariant");
3163 
3164   cfs->guarantee_more(2, CHECK);  // sourcefile_index
3165   const u2 sourcefile_index = cfs->get_u2_fast();
3166   check_property(
3167     valid_symbol_at(sourcefile_index),
3168     "Invalid SourceFile attribute at constant pool index %u in class file %s",
3169     sourcefile_index, CHECK);
3170   set_class_sourcefile_index(sourcefile_index);
3171 }
3172 
3173 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3174                                                                        int length,
3175                                                                        TRAPS) {
3176   assert(cfs != NULL, "invariant");
3177 
3178   const u1* const sde_buffer = cfs->current();
3179   assert(sde_buffer != NULL, "null sde buffer");
3180 
3181   // Don't bother storing it if there is no way to retrieve it
3182   if (JvmtiExport::can_get_source_debug_extension()) {
3183     assert((length+1) > length, "Overflow checking");
3184     u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3185     for (int i = 0; i < length; i++) {
3186       sde[i] = sde_buffer[i];
3187     }
3188     sde[length] = '\0';
3189     set_class_sde_buffer((const char*)sde, length);
3190   }
3191   // Got utf8 string, set stream position forward
3192   cfs->skip_u1(length, CHECK);
3193 }
3194 
3195 
3196 // Inner classes can be static, private or protected (classic VM does this)
3197 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3198                                            JVM_ACC_PRIVATE |                \
3199                                            JVM_ACC_PROTECTED |              \
3200                                            JVM_ACC_STATIC                   \
3201                                          )
3202 
3203 // Return number of classes in the inner classes attribute table
3204 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3205                                                             const u1* const inner_classes_attribute_start,
3206                                                             bool parsed_enclosingmethod_attribute,
3207                                                             u2 enclosing_method_class_index,
3208                                                             u2 enclosing_method_method_index,
3209                                                             TRAPS) {
3210   const u1* const current_mark = cfs->current();
3211   u2 length = 0;
3212   if (inner_classes_attribute_start != NULL) {
3213     cfs->set_current(inner_classes_attribute_start);
3214     cfs->guarantee_more(2, CHECK_0);  // length
3215     length = cfs->get_u2_fast();
3216   }
3217 
3218   // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3219   // method data:
3220   //   [inner_class_info_index,
3221   //    outer_class_info_index,
3222   //    inner_name_index,
3223   //    inner_class_access_flags,
3224   //    ...
3225   //    enclosing_method_class_index,
3226   //    enclosing_method_method_index]
3227   const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3228   Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3229   _inner_classes = inner_classes;
3230 
3231   int index = 0;
3232   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
3233   for (int n = 0; n < length; n++) {
3234     // Inner class index
3235     const u2 inner_class_info_index = cfs->get_u2_fast();
3236     check_property(
3237       valid_klass_reference_at(inner_class_info_index),
3238       "inner_class_info_index %u has bad constant type in class file %s",
3239       inner_class_info_index, CHECK_0);
3240     // Outer class index
3241     const u2 outer_class_info_index = cfs->get_u2_fast();
3242     check_property(
3243       outer_class_info_index == 0 ||
3244         valid_klass_reference_at(outer_class_info_index),
3245       "outer_class_info_index %u has bad constant type in class file %s",
3246       outer_class_info_index, CHECK_0);
3247     // Inner class name
3248     const u2 inner_name_index = cfs->get_u2_fast();
3249     check_property(
3250       inner_name_index == 0 || valid_symbol_at(inner_name_index),
3251       "inner_name_index %u has bad constant type in class file %s",
3252       inner_name_index, CHECK_0);
3253     if (_need_verify) {
3254       guarantee_property(inner_class_info_index != outer_class_info_index,
3255                          "Class is both outer and inner class in class file %s", CHECK_0);
3256     }
3257 
3258     jint recognized_modifiers = RECOGNIZED_INNER_CLASS_MODIFIERS;
3259     // JVM_ACC_MODULE is defined in JDK-9 and later.
3260     if (_major_version >= JAVA_9_VERSION) {
3261       recognized_modifiers |= JVM_ACC_MODULE;
3262     }
3263     // JVM_ACC_VALUE is defined for class file version 55 and later
3264     if (supports_value_types()) {
3265       recognized_modifiers |= JVM_ACC_VALUE;
3266     }
3267 
3268     // Access flags
3269     jint flags = cfs->get_u2_fast() & recognized_modifiers;
3270 
3271     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3272       // Set abstract bit for old class files for backward compatibility
3273       flags |= JVM_ACC_ABSTRACT;
3274     }
3275     verify_legal_class_modifiers(flags, CHECK_0);
3276     AccessFlags inner_access_flags(flags);
3277 
3278     inner_classes->at_put(index++, inner_class_info_index);
3279     inner_classes->at_put(index++, outer_class_info_index);
3280     inner_classes->at_put(index++, inner_name_index);
3281     inner_classes->at_put(index++, inner_access_flags.as_short());
3282   }
3283 
3284   // 4347400: make sure there's no duplicate entry in the classes array
3285   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3286     for(int i = 0; i < length * 4; i += 4) {
3287       for(int j = i + 4; j < length * 4; j += 4) {
3288         guarantee_property((inner_classes->at(i)   != inner_classes->at(j) ||
3289                             inner_classes->at(i+1) != inner_classes->at(j+1) ||
3290                             inner_classes->at(i+2) != inner_classes->at(j+2) ||
3291                             inner_classes->at(i+3) != inner_classes->at(j+3)),
3292                             "Duplicate entry in InnerClasses in class file %s",
3293                             CHECK_0);
3294       }
3295     }
3296   }
3297 
3298   // Set EnclosingMethod class and method indexes.
3299   if (parsed_enclosingmethod_attribute) {
3300     inner_classes->at_put(index++, enclosing_method_class_index);
3301     inner_classes->at_put(index++, enclosing_method_method_index);
3302   }
3303   assert(index == size, "wrong size");
3304 
3305   // Restore buffer's current position.
3306   cfs->set_current(current_mark);
3307 
3308   return length;
3309 }
3310 
3311 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3312                                                            const u1* const nest_members_attribute_start,
3313                                                            TRAPS) {
3314   const u1* const current_mark = cfs->current();
3315   u2 length = 0;
3316   if (nest_members_attribute_start != NULL) {
3317     cfs->set_current(nest_members_attribute_start);
3318     cfs->guarantee_more(2, CHECK_0);  // length
3319     length = cfs->get_u2_fast();
3320   }
3321   const int size = length;
3322   Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3323   _nest_members = nest_members;
3324 
3325   int index = 0;
3326   cfs->guarantee_more(2 * length, CHECK_0);
3327   for (int n = 0; n < length; n++) {
3328     const u2 class_info_index = cfs->get_u2_fast();
3329     check_property(
3330       valid_klass_reference_at(class_info_index),
3331       "Nest member class_info_index %u has bad constant type in class file %s",
3332       class_info_index, CHECK_0);
3333     nest_members->at_put(index++, class_info_index);
3334   }
3335   assert(index == size, "wrong size");
3336 
3337   // Restore buffer's current position.
3338   cfs->set_current(current_mark);
3339 
3340   return length;
3341 }
3342 
3343 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3344   set_class_synthetic_flag(true);
3345 }
3346 
3347 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3348   assert(cfs != NULL, "invariant");
3349 
3350   const u2 signature_index = cfs->get_u2(CHECK);
3351   check_property(
3352     valid_symbol_at(signature_index),
3353     "Invalid constant pool index %u in Signature attribute in class file %s",
3354     signature_index, CHECK);
3355   set_class_generic_signature_index(signature_index);
3356 }
3357 
3358 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3359                                                                   ConstantPool* cp,
3360                                                                   u4 attribute_byte_length,
3361                                                                   TRAPS) {
3362   assert(cfs != NULL, "invariant");
3363   assert(cp != NULL, "invariant");
3364 
3365   const u1* const current_start = cfs->current();
3366 
3367   guarantee_property(attribute_byte_length >= sizeof(u2),
3368                      "Invalid BootstrapMethods attribute length %u in class file %s",
3369                      attribute_byte_length,
3370                      CHECK);
3371 
3372   cfs->guarantee_more(attribute_byte_length, CHECK);
3373 
3374   const int attribute_array_length = cfs->get_u2_fast();
3375 
3376   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3377                      "Short length on BootstrapMethods in class file %s",
3378                      CHECK);
3379 
3380 
3381   // The attribute contains a counted array of counted tuples of shorts,
3382   // represending bootstrap specifiers:
3383   //    length*{bootstrap_method_index, argument_count*{argument_index}}
3384   const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3385   // operand_count = number of shorts in attr, except for leading length
3386 
3387   // The attribute is copied into a short[] array.
3388   // The array begins with a series of short[2] pairs, one for each tuple.
3389   const int index_size = (attribute_array_length * 2);
3390 
3391   Array<u2>* const operands =
3392     MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3393 
3394   // Eagerly assign operands so they will be deallocated with the constant
3395   // pool if there is an error.
3396   cp->set_operands(operands);
3397 
3398   int operand_fill_index = index_size;
3399   const int cp_size = cp->length();
3400 
3401   for (int n = 0; n < attribute_array_length; n++) {
3402     // Store a 32-bit offset into the header of the operand array.
3403     ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3404 
3405     // Read a bootstrap specifier.
3406     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
3407     const u2 bootstrap_method_index = cfs->get_u2_fast();
3408     const u2 argument_count = cfs->get_u2_fast();
3409     check_property(
3410       valid_cp_range(bootstrap_method_index, cp_size) &&
3411       cp->tag_at(bootstrap_method_index).is_method_handle(),
3412       "bootstrap_method_index %u has bad constant type in class file %s",
3413       bootstrap_method_index,
3414       CHECK);
3415 
3416     guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3417       "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3418       CHECK);
3419 
3420     operands->at_put(operand_fill_index++, bootstrap_method_index);
3421     operands->at_put(operand_fill_index++, argument_count);
3422 
3423     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
3424     for (int j = 0; j < argument_count; j++) {
3425       const u2 argument_index = cfs->get_u2_fast();
3426       check_property(
3427         valid_cp_range(argument_index, cp_size) &&
3428         cp->tag_at(argument_index).is_loadable_constant(),
3429         "argument_index %u has bad constant type in class file %s",
3430         argument_index,
3431         CHECK);
3432       operands->at_put(operand_fill_index++, argument_index);
3433     }
3434   }
3435   guarantee_property(current_start + attribute_byte_length == cfs->current(),
3436                      "Bad length on BootstrapMethods in class file %s",
3437                      CHECK);
3438 }
3439 
3440 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3441                                                  ConstantPool* cp,
3442                  ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3443                                                  TRAPS) {
3444   assert(cfs != NULL, "invariant");
3445   assert(cp != NULL, "invariant");
3446   assert(parsed_annotations != NULL, "invariant");
3447 
3448   // Set inner classes attribute to default sentinel
3449   _inner_classes = Universe::the_empty_short_array();
3450   // Set nest members attribute to default sentinel
3451   _nest_members = Universe::the_empty_short_array();
3452   cfs->guarantee_more(2, CHECK);  // attributes_count
3453   u2 attributes_count = cfs->get_u2_fast();
3454   bool parsed_sourcefile_attribute = false;
3455   bool parsed_innerclasses_attribute = false;
3456   bool parsed_nest_members_attribute = false;
3457   bool parsed_nest_host_attribute = false;
3458   bool parsed_enclosingmethod_attribute = false;
3459   bool parsed_bootstrap_methods_attribute = false;
3460   const u1* runtime_visible_annotations = NULL;
3461   int runtime_visible_annotations_length = 0;
3462   const u1* runtime_invisible_annotations = NULL;
3463   int runtime_invisible_annotations_length = 0;
3464   const u1* runtime_visible_type_annotations = NULL;
3465   int runtime_visible_type_annotations_length = 0;
3466   const u1* runtime_invisible_type_annotations = NULL;
3467   int runtime_invisible_type_annotations_length = 0;
3468   bool runtime_invisible_type_annotations_exists = false;
3469   bool runtime_invisible_annotations_exists = false;
3470   bool parsed_source_debug_ext_annotations_exist = false;
3471   const u1* inner_classes_attribute_start = NULL;
3472   u4  inner_classes_attribute_length = 0;
3473   const u1* value_types_attribute_start = NULL;
3474   u4 value_types_attribute_length = 0;
3475   u2  enclosing_method_class_index = 0;
3476   u2  enclosing_method_method_index = 0;
3477   const u1* nest_members_attribute_start = NULL;
3478   u4  nest_members_attribute_length = 0;
3479 
3480   // Iterate over attributes
3481   while (attributes_count--) {
3482     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
3483     const u2 attribute_name_index = cfs->get_u2_fast();
3484     const u4 attribute_length = cfs->get_u4_fast();
3485     check_property(
3486       valid_symbol_at(attribute_name_index),
3487       "Attribute name has bad constant pool index %u in class file %s",
3488       attribute_name_index, CHECK);
3489     const Symbol* const tag = cp->symbol_at(attribute_name_index);
3490     if (tag == vmSymbols::tag_source_file()) {
3491       // Check for SourceFile tag
3492       if (_need_verify) {
3493         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3494       }
3495       if (parsed_sourcefile_attribute) {
3496         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3497       } else {
3498         parsed_sourcefile_attribute = true;
3499       }
3500       parse_classfile_sourcefile_attribute(cfs, CHECK);
3501     } else if (tag == vmSymbols::tag_source_debug_extension()) {
3502       // Check for SourceDebugExtension tag
3503       if (parsed_source_debug_ext_annotations_exist) {
3504           classfile_parse_error(
3505             "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3506       }
3507       parsed_source_debug_ext_annotations_exist = true;
3508       parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3509     } else if (tag == vmSymbols::tag_inner_classes()) {
3510       // Check for InnerClasses tag
3511       if (parsed_innerclasses_attribute) {
3512         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3513       } else {
3514         parsed_innerclasses_attribute = true;
3515       }
3516       inner_classes_attribute_start = cfs->current();
3517       inner_classes_attribute_length = attribute_length;
3518       cfs->skip_u1(inner_classes_attribute_length, CHECK);
3519     } else if (tag == vmSymbols::tag_synthetic()) {
3520       // Check for Synthetic tag
3521       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3522       if (attribute_length != 0) {
3523         classfile_parse_error(
3524           "Invalid Synthetic classfile attribute length %u in class file %s",
3525           attribute_length, CHECK);
3526       }
3527       parse_classfile_synthetic_attribute(CHECK);
3528     } else if (tag == vmSymbols::tag_deprecated()) {
3529       // Check for Deprecatd tag - 4276120
3530       if (attribute_length != 0) {
3531         classfile_parse_error(
3532           "Invalid Deprecated classfile attribute length %u in class file %s",
3533           attribute_length, CHECK);
3534       }
3535     } else if (_major_version >= JAVA_1_5_VERSION) {
3536       if (tag == vmSymbols::tag_signature()) {
3537         if (_generic_signature_index != 0) {
3538           classfile_parse_error(
3539             "Multiple Signature attributes in class file %s", CHECK);
3540         }
3541         if (attribute_length != 2) {
3542           classfile_parse_error(
3543             "Wrong Signature attribute length %u in class file %s",
3544             attribute_length, CHECK);
3545         }
3546         parse_classfile_signature_attribute(cfs, CHECK);
3547       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3548         if (runtime_visible_annotations != NULL) {
3549           classfile_parse_error(
3550             "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3551         }
3552         runtime_visible_annotations_length = attribute_length;
3553         runtime_visible_annotations = cfs->current();
3554         assert(runtime_visible_annotations != NULL, "null visible annotations");
3555         cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3556         parse_annotations(cp,
3557                           runtime_visible_annotations,
3558                           runtime_visible_annotations_length,
3559                           parsed_annotations,
3560                           _loader_data,
3561                           CHECK);
3562         cfs->skip_u1_fast(runtime_visible_annotations_length);
3563       } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3564         if (runtime_invisible_annotations_exists) {
3565           classfile_parse_error(
3566             "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3567         }
3568         runtime_invisible_annotations_exists = true;
3569         if (PreserveAllAnnotations) {
3570           runtime_invisible_annotations_length = attribute_length;
3571           runtime_invisible_annotations = cfs->current();
3572           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3573         }
3574         cfs->skip_u1(attribute_length, CHECK);
3575       } else if (tag == vmSymbols::tag_enclosing_method()) {
3576         if (parsed_enclosingmethod_attribute) {
3577           classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3578         } else {
3579           parsed_enclosingmethod_attribute = true;
3580         }
3581         guarantee_property(attribute_length == 4,
3582           "Wrong EnclosingMethod attribute length %u in class file %s",
3583           attribute_length, CHECK);
3584         cfs->guarantee_more(4, CHECK);  // class_index, method_index
3585         enclosing_method_class_index  = cfs->get_u2_fast();
3586         enclosing_method_method_index = cfs->get_u2_fast();
3587         if (enclosing_method_class_index == 0) {
3588           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3589         }
3590         // Validate the constant pool indices and types
3591         check_property(valid_klass_reference_at(enclosing_method_class_index),
3592           "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3593         if (enclosing_method_method_index != 0 &&
3594             (!cp->is_within_bounds(enclosing_method_method_index) ||
3595              !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3596           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3597         }
3598       } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3599                  _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3600         if (parsed_bootstrap_methods_attribute) {
3601           classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3602         }
3603         parsed_bootstrap_methods_attribute = true;
3604         parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3605       } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3606         if (runtime_visible_type_annotations != NULL) {
3607           classfile_parse_error(
3608             "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3609         }
3610         runtime_visible_type_annotations_length = attribute_length;
3611         runtime_visible_type_annotations = cfs->current();
3612         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3613         // No need for the VM to parse Type annotations
3614         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3615       } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3616         if (runtime_invisible_type_annotations_exists) {
3617           classfile_parse_error(
3618             "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3619         } else {
3620           runtime_invisible_type_annotations_exists = true;
3621         }
3622         if (PreserveAllAnnotations) {
3623           runtime_invisible_type_annotations_length = attribute_length;
3624           runtime_invisible_type_annotations = cfs->current();
3625           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3626         }
3627         cfs->skip_u1(attribute_length, CHECK);
3628       } else if (_major_version >= JAVA_11_VERSION) {
3629         if (tag == vmSymbols::tag_nest_members()) {
3630           // Check for NestMembers tag
3631           if (parsed_nest_members_attribute) {
3632             classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3633           } else {
3634             parsed_nest_members_attribute = true;
3635           }
3636           if (parsed_nest_host_attribute) {
3637             classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3638           }
3639           nest_members_attribute_start = cfs->current();
3640           nest_members_attribute_length = attribute_length;
3641           cfs->skip_u1(nest_members_attribute_length, CHECK);
3642         } else if (tag == vmSymbols::tag_nest_host()) {
3643           if (parsed_nest_host_attribute) {
3644             classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3645           } else {
3646             parsed_nest_host_attribute = true;
3647           }
3648           if (parsed_nest_members_attribute) {
3649             classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3650           }
3651           if (_need_verify) {
3652             guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3653           }
3654           cfs->guarantee_more(2, CHECK);
3655           u2 class_info_index = cfs->get_u2_fast();
3656           check_property(
3657                          valid_klass_reference_at(class_info_index),
3658                          "Nest-host class_info_index %u has bad constant type in class file %s",
3659                          class_info_index, CHECK);
3660           _nest_host = class_info_index;
3661         } else {
3662           // Unknown attribute
3663           cfs->skip_u1(attribute_length, CHECK);
3664         }
3665       } else {
3666         // Unknown attribute
3667         cfs->skip_u1(attribute_length, CHECK);
3668       }
3669     } else {
3670       // Unknown attribute
3671       cfs->skip_u1(attribute_length, CHECK);
3672     }
3673   }
3674   _annotations = assemble_annotations(runtime_visible_annotations,
3675                                       runtime_visible_annotations_length,
3676                                       runtime_invisible_annotations,
3677                                       runtime_invisible_annotations_length,
3678                                       CHECK);
3679   _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3680                                            runtime_visible_type_annotations_length,
3681                                            runtime_invisible_type_annotations,
3682                                            runtime_invisible_type_annotations_length,
3683                                            CHECK);
3684 
3685   if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3686     const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3687                             cfs,
3688                             inner_classes_attribute_start,
3689                             parsed_innerclasses_attribute,
3690                             enclosing_method_class_index,
3691                             enclosing_method_method_index,
3692                             CHECK);
3693     if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3694       guarantee_property(
3695         inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3696         "Wrong InnerClasses attribute length in class file %s", CHECK);
3697     }
3698   }
3699 
3700   if (parsed_nest_members_attribute) {
3701     const u2 num_of_classes = parse_classfile_nest_members_attribute(
3702                             cfs,
3703                             nest_members_attribute_start,
3704                             CHECK);
3705     if (_need_verify) {
3706       guarantee_property(
3707         nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3708         "Wrong NestMembers attribute length in class file %s", CHECK);
3709     }
3710   }
3711 
3712   if (_max_bootstrap_specifier_index >= 0) {
3713     guarantee_property(parsed_bootstrap_methods_attribute,
3714                        "Missing BootstrapMethods attribute in class file %s", CHECK);
3715   }
3716 }
3717 
3718 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3719   assert(k != NULL, "invariant");
3720 
3721   if (_synthetic_flag)
3722     k->set_is_synthetic();
3723   if (_sourcefile_index != 0) {
3724     k->set_source_file_name_index(_sourcefile_index);
3725   }
3726   if (_generic_signature_index != 0) {
3727     k->set_generic_signature_index(_generic_signature_index);
3728   }
3729   if (_sde_buffer != NULL) {
3730     k->set_source_debug_extension(_sde_buffer, _sde_length);
3731   }
3732 }
3733 
3734 // Create the Annotations object that will
3735 // hold the annotations array for the Klass.
3736 void ClassFileParser::create_combined_annotations(TRAPS) {
3737     if (_annotations == NULL &&
3738         _type_annotations == NULL &&
3739         _fields_annotations == NULL &&
3740         _fields_type_annotations == NULL) {
3741       // Don't create the Annotations object unnecessarily.
3742       return;
3743     }
3744 
3745     Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3746     annotations->set_class_annotations(_annotations);
3747     annotations->set_class_type_annotations(_type_annotations);
3748     annotations->set_fields_annotations(_fields_annotations);
3749     annotations->set_fields_type_annotations(_fields_type_annotations);
3750 
3751     // This is the Annotations object that will be
3752     // assigned to InstanceKlass being constructed.
3753     _combined_annotations = annotations;
3754 
3755     // The annotations arrays below has been transfered the
3756     // _combined_annotations so these fields can now be cleared.
3757     _annotations             = NULL;
3758     _type_annotations        = NULL;
3759     _fields_annotations      = NULL;
3760     _fields_type_annotations = NULL;
3761 }
3762 
3763 // Transfer ownership of metadata allocated to the InstanceKlass.
3764 void ClassFileParser::apply_parsed_class_metadata(
3765                                             InstanceKlass* this_klass,
3766                                             int java_fields_count, TRAPS) {
3767   assert(this_klass != NULL, "invariant");
3768 
3769   _cp->set_pool_holder(this_klass);
3770   this_klass->set_constants(_cp);
3771   this_klass->set_fields(_fields, java_fields_count);
3772   this_klass->set_methods(_methods);
3773   this_klass->set_inner_classes(_inner_classes);
3774   this_klass->set_nest_members(_nest_members);
3775   this_klass->set_nest_host_index(_nest_host);
3776   this_klass->set_local_interfaces(_local_interfaces);
3777   this_klass->set_annotations(_combined_annotations);
3778   // Delay the setting of _transitive_interfaces until after initialize_supers() in
3779   // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3780   // its _super. If an OOM occurs while loading the current klass, its _super field
3781   // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3782   // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3783   // dereferences to the deallocated _transitive_interfaces will result in a crash.
3784 
3785   // Clear out these fields so they don't get deallocated by the destructor
3786   clear_class_metadata();
3787 }
3788 
3789 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3790                                                        int runtime_visible_annotations_length,
3791                                                        const u1* const runtime_invisible_annotations,
3792                                                        int runtime_invisible_annotations_length,
3793                                                        TRAPS) {
3794   AnnotationArray* annotations = NULL;
3795   if (runtime_visible_annotations != NULL ||
3796       runtime_invisible_annotations != NULL) {
3797     annotations = MetadataFactory::new_array<u1>(_loader_data,
3798                                           runtime_visible_annotations_length +
3799                                           runtime_invisible_annotations_length,
3800                                           CHECK_(annotations));
3801     if (runtime_visible_annotations != NULL) {
3802       for (int i = 0; i < runtime_visible_annotations_length; i++) {
3803         annotations->at_put(i, runtime_visible_annotations[i]);
3804       }
3805     }
3806     if (runtime_invisible_annotations != NULL) {
3807       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3808         int append = runtime_visible_annotations_length+i;
3809         annotations->at_put(append, runtime_invisible_annotations[i]);
3810       }
3811     }
3812   }
3813   return annotations;
3814 }
3815 
3816 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3817                                                         const int super_class_index,
3818                                                         const bool need_verify,
3819                                                         TRAPS) {
3820   assert(cp != NULL, "invariant");
3821   const InstanceKlass* super_klass = NULL;
3822 
3823   if (super_class_index == 0) {
3824     check_property(_class_name == vmSymbols::java_lang_Object()
3825                    || (_access_flags.get_flags() & JVM_ACC_VALUE),
3826                    "Invalid superclass index %u in class file %s",
3827                    super_class_index,
3828                    CHECK_NULL);
3829   } else {
3830     check_property(valid_klass_reference_at(super_class_index),
3831                    "Invalid superclass index %u in class file %s",
3832                    super_class_index,
3833                    CHECK_NULL);
3834     // The class name should be legal because it is checked when parsing constant pool.
3835     // However, make sure it is not an array type.
3836     bool is_array = false;
3837     if (cp->tag_at(super_class_index).is_klass()) {
3838       super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3839       if (need_verify)
3840         is_array = super_klass->is_array_klass();
3841     } else if (need_verify) {
3842       is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3843     }
3844     if (need_verify) {
3845       guarantee_property(!is_array,
3846                         "Bad superclass name in class file %s", CHECK_NULL);
3847     }
3848   }
3849   return super_klass;
3850 }
3851 
3852 #ifndef PRODUCT
3853 static void print_field_layout(const Symbol* name,
3854                                Array<u2>* fields,
3855                                const constantPoolHandle& cp,
3856                                int instance_size,
3857                                int instance_fields_start,
3858                                int instance_fields_end,
3859                                int static_fields_end) {
3860 
3861   assert(name != NULL, "invariant");
3862 
3863   tty->print("%s: field layout\n", name->as_klass_external_name());
3864   tty->print("  @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3865   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3866     if (!fs.access_flags().is_static()) {
3867       tty->print("  @%3d \"%s\" %s\n",
3868         fs.offset(),
3869         fs.name()->as_klass_external_name(),
3870         fs.signature()->as_klass_external_name());
3871     }
3872   }
3873   tty->print("  @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3874   tty->print("  @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3875   tty->print("  @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3876   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3877     if (fs.access_flags().is_static()) {
3878       tty->print("  @%3d \"%s\" %s\n",
3879         fs.offset(),
3880         fs.name()->as_klass_external_name(),
3881         fs.signature()->as_klass_external_name());
3882     }
3883   }
3884   tty->print("  @%3d %s\n", static_fields_end, "--- static fields end ---");
3885   tty->print("\n");
3886 }
3887 #endif
3888 
3889 // Values needed for oopmap and InstanceKlass creation
3890 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3891  public:
3892   OopMapBlocksBuilder* oop_map_blocks;
3893   int           instance_size;
3894   int           nonstatic_field_size;
3895   int           static_field_size;
3896   bool          has_nonstatic_fields;
3897 };
3898 
3899 // Utility to collect and compact oop maps during layout
3900 class ClassFileParser::OopMapBlocksBuilder : public ResourceObj {
3901  public:
3902   OopMapBlock*  nonstatic_oop_maps;
3903   unsigned int  nonstatic_oop_map_count;
3904   unsigned int  max_nonstatic_oop_maps;
3905 
3906  public:
3907   OopMapBlocksBuilder(unsigned int  max_blocks, TRAPS) {
3908     max_nonstatic_oop_maps = max_blocks;
3909     nonstatic_oop_map_count = 0;
3910     if (max_blocks == 0) {
3911       nonstatic_oop_maps = NULL;
3912     } else {
3913       nonstatic_oop_maps = NEW_RESOURCE_ARRAY_IN_THREAD(
3914         THREAD, OopMapBlock, max_nonstatic_oop_maps);
3915       memset(nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks);
3916     }
3917   }
3918 
3919   OopMapBlock* last_oop_map() const {
3920     assert(nonstatic_oop_map_count > 0, "Has no oop maps");
3921     return nonstatic_oop_maps + (nonstatic_oop_map_count - 1);
3922   }
3923 
3924   // addition of super oop maps
3925   void initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) {
3926     assert(nof_blocks && nonstatic_oop_map_count == 0 &&
3927         nof_blocks <= max_nonstatic_oop_maps, "invariant");
3928 
3929     memcpy(nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks);
3930     nonstatic_oop_map_count += nof_blocks;
3931   }
3932 
3933   // collection of oops
3934   void add(int offset, int count) {
3935     if (nonstatic_oop_map_count == 0) {
3936       nonstatic_oop_map_count++;
3937     }
3938     OopMapBlock*  nonstatic_oop_map = last_oop_map();
3939     if (nonstatic_oop_map->count() == 0) {  // Unused map, set it up
3940       nonstatic_oop_map->set_offset(offset);
3941       nonstatic_oop_map->set_count(count);
3942     } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add
3943       nonstatic_oop_map->increment_count(count);
3944     } else { // Need a new one...
3945       nonstatic_oop_map_count++;
3946       assert(nonstatic_oop_map_count <= max_nonstatic_oop_maps, "range check");
3947       nonstatic_oop_map = last_oop_map();
3948       nonstatic_oop_map->set_offset(offset);
3949       nonstatic_oop_map->set_count(count);
3950     }
3951   }
3952 
3953   // general purpose copy, e.g. into allocated instanceKlass
3954   void copy(OopMapBlock* dst) {
3955     if (nonstatic_oop_map_count != 0) {
3956       memcpy(dst, nonstatic_oop_maps, sizeof(OopMapBlock) * nonstatic_oop_map_count);
3957     }
3958   }
3959 
3960   // Sort and compact adjacent blocks
3961   void compact(TRAPS) {
3962     if (nonstatic_oop_map_count <= 1) {
3963       return;
3964     }
3965     /*
3966      * Since field layout sneeks in oops before values, we will be able to condense
3967      * blocks. There is potential to compact between super, own refs and values
3968      * containing refs.
3969      *
3970      * Currently compaction is slightly limited due to values being 8 byte aligned.
3971      * This may well change: FixMe if doesn't, the code below is fairly general purpose
3972      * and maybe it doesn't need to be.
3973      */
3974     qsort(nonstatic_oop_maps, nonstatic_oop_map_count, sizeof(OopMapBlock),
3975         (_sort_Fn)OopMapBlock::compare_offset);
3976     if (nonstatic_oop_map_count < 2) {
3977       return;
3978     }
3979 
3980      //Make a temp copy, and iterate through and copy back into the orig
3981     ResourceMark rm(THREAD);
3982     OopMapBlock* oop_maps_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, OopMapBlock,
3983         nonstatic_oop_map_count);
3984     OopMapBlock* oop_maps_copy_end = oop_maps_copy + nonstatic_oop_map_count;
3985     copy(oop_maps_copy);
3986     OopMapBlock*  nonstatic_oop_map = nonstatic_oop_maps;
3987     unsigned int new_count = 1;
3988     oop_maps_copy++;
3989     while(oop_maps_copy < oop_maps_copy_end) {
3990       assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant");
3991       if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) {
3992         nonstatic_oop_map->increment_count(oop_maps_copy->count());
3993       } else {
3994         nonstatic_oop_map++;
3995         new_count++;
3996         nonstatic_oop_map->set_offset(oop_maps_copy->offset());
3997         nonstatic_oop_map->set_count(oop_maps_copy->count());
3998       }
3999       oop_maps_copy++;
4000     }
4001     assert(new_count <= nonstatic_oop_map_count, "end up with more maps after compact() ?");
4002     nonstatic_oop_map_count = new_count;
4003   }
4004 
4005   void print_on(outputStream* st) const {
4006     st->print_cr("  OopMapBlocks: %3d  /%3d", nonstatic_oop_map_count, max_nonstatic_oop_maps);
4007     if (nonstatic_oop_map_count > 0) {
4008       OopMapBlock* map = nonstatic_oop_maps;
4009       OopMapBlock* last_map = last_oop_map();
4010       assert(map <= last_map, "Last less than first");
4011       while (map <= last_map) {
4012         st->print_cr("    Offset: %3d  -%3d Count: %3d", map->offset(),
4013             map->offset() + map->offset_span() - heapOopSize, map->count());
4014         map++;
4015       }
4016     }
4017   }
4018 
4019   void print_value_on(outputStream* st) const {
4020     print_on(st);
4021   }
4022 
4023 };
4024 
4025 void ClassFileParser::throwValueTypeLimitation(THREAD_AND_LOCATION_DECL,
4026                                                const char* msg,
4027                                                const Symbol* name,
4028                                                const Symbol* sig) const {
4029 
4030   ResourceMark rm(THREAD);
4031   if (name == NULL || sig == NULL) {
4032     Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4033         vmSymbols::java_lang_ClassFormatError(),
4034         "class: %s - %s", _class_name->as_C_string(), msg);
4035   }
4036   else {
4037     Exceptions::fthrow(THREAD_AND_LOCATION_ARGS,
4038         vmSymbols::java_lang_ClassFormatError(),
4039         "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(),
4040         _class_name->as_C_string(), msg);
4041   }
4042 }
4043 
4044 // Layout fields and fill in FieldLayoutInfo.  Could use more refactoring!
4045 void ClassFileParser::layout_fields(ConstantPool* cp,
4046                                     const FieldAllocationCount* fac,
4047                                     const ClassAnnotationCollector* parsed_annotations,
4048                                     FieldLayoutInfo* info,
4049                                     TRAPS) {
4050 
4051   assert(cp != NULL, "invariant");
4052 
4053   // Field size and offset computation
4054   int nonstatic_field_size = _super_klass == NULL ? 0 :
4055                                _super_klass->nonstatic_field_size();
4056   int next_nonstatic_valuetype_offset = 0;
4057   int first_nonstatic_valuetype_offset = 0;
4058 
4059   // Fields that are value types are handled differently depending if they are static or not:
4060   // - static fields are oops
4061   // - non-static fields are embedded
4062 
4063   // Count the contended fields by type.
4064   //
4065   // We ignore static fields, because @Contended is not supported for them.
4066   // The layout code below will also ignore the static fields.
4067   int nonstatic_contended_count = 0;
4068   FieldAllocationCount fac_contended;
4069   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4070     FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4071     if (fs.is_contended()) {
4072       fac_contended.count[atype]++;
4073       if (!fs.access_flags().is_static()) {
4074         nonstatic_contended_count++;
4075       }
4076     }
4077   }
4078 
4079 
4080   // Calculate the starting byte offsets
4081   int next_static_oop_offset    = InstanceMirrorKlass::offset_of_static_fields();
4082   // Value types in static fields are not embedded, they are handled with oops
4083   int next_static_double_offset = next_static_oop_offset +
4084                                   ((fac->count[STATIC_OOP] + fac->count[STATIC_FLATTENABLE]) * heapOopSize);
4085   if (fac->count[STATIC_DOUBLE]) {
4086     next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
4087   }
4088 
4089   int next_static_word_offset   = next_static_double_offset +
4090                                     ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
4091   int next_static_short_offset  = next_static_word_offset +
4092                                     ((fac->count[STATIC_WORD]) * BytesPerInt);
4093   int next_static_byte_offset   = next_static_short_offset +
4094                                   ((fac->count[STATIC_SHORT]) * BytesPerShort);
4095 
4096   int nonstatic_fields_start  = instanceOopDesc::base_offset_in_bytes() +
4097                                 nonstatic_field_size * heapOopSize;
4098 
4099   // First field of value types is aligned on a long boundary in order to ease
4100   // in-lining of value types (with header removal) in packed arrays and
4101   // flatten value types
4102   int initial_value_type_padding = 0;
4103   if (is_value_type()) {
4104     int old = nonstatic_fields_start;
4105     nonstatic_fields_start = align_up(nonstatic_fields_start, BytesPerLong);
4106     initial_value_type_padding = nonstatic_fields_start - old;
4107   }
4108 
4109   int next_nonstatic_field_offset = nonstatic_fields_start;
4110 
4111   const bool is_contended_class     = parsed_annotations->is_contended();
4112 
4113   // Class is contended, pad before all the fields
4114   if (is_contended_class) {
4115     next_nonstatic_field_offset += ContendedPaddingWidth;
4116   }
4117 
4118   // Temporary value types restrictions
4119   if (is_value_type()) {
4120     if (is_contended_class) {
4121       throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support @Contended annotation yet");
4122       return;
4123     }
4124   }
4125 
4126   // Compute the non-contended fields count.
4127   // The packing code below relies on these counts to determine if some field
4128   // can be squeezed into the alignment gap. Contended fields are obviously
4129   // exempt from that.
4130   unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
4131   unsigned int nonstatic_word_count   = fac->count[NONSTATIC_WORD]   - fac_contended.count[NONSTATIC_WORD];
4132   unsigned int nonstatic_short_count  = fac->count[NONSTATIC_SHORT]  - fac_contended.count[NONSTATIC_SHORT];
4133   unsigned int nonstatic_byte_count   = fac->count[NONSTATIC_BYTE]   - fac_contended.count[NONSTATIC_BYTE];
4134   unsigned int nonstatic_oop_count    = fac->count[NONSTATIC_OOP]    - fac_contended.count[NONSTATIC_OOP];
4135 
4136   int static_value_type_count = 0;
4137   int nonstatic_value_type_count = 0;
4138   int* nonstatic_value_type_indexes = NULL;
4139   Klass** nonstatic_value_type_klasses = NULL;
4140   unsigned int value_type_oop_map_count = 0;
4141   int not_flattened_value_types = 0;
4142 
4143   int max_nonstatic_value_type = fac->count[NONSTATIC_FLATTENABLE] + 1;
4144 
4145   nonstatic_value_type_indexes = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, int,
4146                                                               max_nonstatic_value_type);
4147   for (int i = 0; i < max_nonstatic_value_type; i++) {
4148     nonstatic_value_type_indexes[i] = -1;
4149   }
4150   nonstatic_value_type_klasses = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, Klass*,
4151                                                               max_nonstatic_value_type);
4152 
4153   for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
4154     if (fs.allocation_type() == STATIC_FLATTENABLE) {
4155       // Pre-resolve the flattenable field and check for value type circularity
4156       // issues.  Note that super-class circularity checks are not needed here
4157       // because flattenable fields can only be in value types and value types
4158       // only have java.lang.Object as their super class.
4159       // Also, note that super-interface circularity checks are not needed
4160       // because interfaces cannot be value types.
4161       ResourceMark rm;
4162       if (!fs.signature()->is_Q_signature()) {
4163         THROW(vmSymbols::java_lang_ClassFormatError());
4164       }
4165       Klass* klass =
4166         SystemDictionary::resolve_flattenable_field_or_fail(&fs,
4167                                                             Handle(THREAD, _loader_data->class_loader()),
4168                                                             _protection_domain, true, CHECK);
4169       assert(klass != NULL, "Sanity check");
4170       if (!klass->access_flags().is_value_type()) {
4171         THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
4172       }
4173       static_value_type_count++;
4174     } else if (fs.allocation_type() == NONSTATIC_FLATTENABLE) {
4175       // Pre-resolve the flattenable field and check for value type circularity issues.
4176       ResourceMark rm;
4177       if (!fs.signature()->is_Q_signature()) {
4178         THROW(vmSymbols::java_lang_ClassFormatError());
4179       }
4180       Klass* klass =
4181         SystemDictionary::resolve_flattenable_field_or_fail(&fs,
4182                                                             Handle(THREAD, _loader_data->class_loader()),
4183                                                             _protection_domain, true, CHECK);
4184       assert(klass != NULL, "Sanity check");
4185       if (!klass->access_flags().is_value_type()) {
4186         THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
4187       }
4188       ValueKlass* vk = ValueKlass::cast(klass);
4189       // Conditions to apply flattening or not should be defined in a single place
4190       if ((ValueFieldMaxFlatSize < 0) || (vk->size_helper() * HeapWordSize) <= ValueFieldMaxFlatSize) {
4191         nonstatic_value_type_indexes[nonstatic_value_type_count] = fs.index();
4192         nonstatic_value_type_klasses[nonstatic_value_type_count] = klass;
4193         nonstatic_value_type_count++;
4194 
4195         ValueKlass* vklass = ValueKlass::cast(klass);
4196         if (vklass->contains_oops()) {
4197           value_type_oop_map_count += vklass->nonstatic_oop_map_count();
4198         }
4199         fs.set_flattened(true);
4200       } else {
4201         not_flattened_value_types++;
4202         fs.set_flattened(false);
4203       }
4204     }
4205   }
4206 
4207   // Adjusting non_static_oop_count to take into account not flattened value types;
4208   nonstatic_oop_count += not_flattened_value_types;
4209 
4210   // Total non-static fields count, including every contended field
4211   unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
4212                                         fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
4213                                         fac->count[NONSTATIC_OOP] + fac->count[NONSTATIC_FLATTENABLE];
4214 
4215   const bool super_has_nonstatic_fields =
4216           (_super_klass != NULL && _super_klass->has_nonstatic_fields());
4217   const bool has_nonstatic_fields =
4218     super_has_nonstatic_fields || (nonstatic_fields_count != 0);
4219   const bool has_nonstatic_value_fields = nonstatic_value_type_count > 0;
4220 
4221   if (is_value_type() && (!has_nonstatic_fields)) {
4222     // There are a number of fixes required throughout the type system and JIT
4223     throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support zero instance size yet");
4224     return;
4225   }
4226 
4227   // Prepare list of oops for oop map generation.
4228   //
4229   // "offset" and "count" lists are describing the set of contiguous oop
4230   // regions. offset[i] is the start of the i-th region, which then has
4231   // count[i] oops following. Before we know how many regions are required,
4232   // we pessimistically allocate the maps to fit all the oops into the
4233   // distinct regions.
4234   //
4235   int super_oop_map_count = (_super_klass == NULL) ? 0 :_super_klass->nonstatic_oop_map_count();
4236   int max_oop_map_count =
4237       super_oop_map_count +
4238       fac->count[NONSTATIC_OOP] +
4239       value_type_oop_map_count +
4240       not_flattened_value_types;
4241 
4242   OopMapBlocksBuilder* nonstatic_oop_maps = new OopMapBlocksBuilder(max_oop_map_count, THREAD);
4243   if (super_oop_map_count > 0) {
4244     nonstatic_oop_maps->initialize_inherited_blocks(_super_klass->start_of_nonstatic_oop_maps(),
4245                                                     _super_klass->nonstatic_oop_map_count());
4246   }
4247 
4248   int first_nonstatic_oop_offset = 0; // will be set for first oop field
4249 
4250   bool compact_fields   = CompactFields;
4251   int allocation_style = FieldsAllocationStyle;
4252   if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
4253     assert(false, "0 <= FieldsAllocationStyle <= 2");
4254     allocation_style = 1; // Optimistic
4255   }
4256 
4257   // The next classes have predefined hard-coded fields offsets
4258   // (see in JavaClasses::compute_hard_coded_offsets()).
4259   // Use default fields allocation order for them.
4260   if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
4261       (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
4262        _class_name == vmSymbols::java_lang_Class() ||
4263        _class_name == vmSymbols::java_lang_ClassLoader() ||
4264        _class_name == vmSymbols::java_lang_ref_Reference() ||
4265        _class_name == vmSymbols::java_lang_ref_SoftReference() ||
4266        _class_name == vmSymbols::java_lang_StackTraceElement() ||
4267        _class_name == vmSymbols::java_lang_String() ||
4268        _class_name == vmSymbols::java_lang_Throwable() ||
4269        _class_name == vmSymbols::java_lang_Boolean() ||
4270        _class_name == vmSymbols::java_lang_Character() ||
4271        _class_name == vmSymbols::java_lang_Float() ||
4272        _class_name == vmSymbols::java_lang_Double() ||
4273        _class_name == vmSymbols::java_lang_Byte() ||
4274        _class_name == vmSymbols::java_lang_Short() ||
4275        _class_name == vmSymbols::java_lang_Integer() ||
4276        _class_name == vmSymbols::java_lang_Long())) {
4277     allocation_style = 0;     // Allocate oops first
4278     compact_fields   = false; // Don't compact fields
4279   }
4280 
4281   int next_nonstatic_oop_offset = 0;
4282   int next_nonstatic_double_offset = 0;
4283 
4284   // Rearrange fields for a given allocation style
4285   if( allocation_style == 0 ) {
4286     // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
4287     next_nonstatic_oop_offset    = next_nonstatic_field_offset;
4288     next_nonstatic_double_offset = next_nonstatic_oop_offset +
4289                                     (nonstatic_oop_count * heapOopSize);
4290   } else if( allocation_style == 1 ) {
4291     // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
4292     next_nonstatic_double_offset = next_nonstatic_field_offset;
4293   } else if( allocation_style == 2 ) {
4294     // Fields allocation: oops fields in super and sub classes are together.
4295     if( nonstatic_field_size > 0 && super_oop_map_count > 0 ) {
4296       if (next_nonstatic_field_offset == nonstatic_oop_maps->last_oop_map()->end_offset()) {
4297         allocation_style = 0;   // allocate oops first
4298         next_nonstatic_oop_offset    = next_nonstatic_field_offset;
4299         next_nonstatic_double_offset = next_nonstatic_oop_offset +
4300                                        (nonstatic_oop_count * heapOopSize);
4301       }
4302     }
4303     if( allocation_style == 2 ) {
4304       allocation_style = 1;     // allocate oops last
4305       next_nonstatic_double_offset = next_nonstatic_field_offset;
4306     }
4307   } else {
4308     ShouldNotReachHere();
4309   }
4310 
4311   int nonstatic_oop_space_count   = 0;
4312   int nonstatic_word_space_count  = 0;
4313   int nonstatic_short_space_count = 0;
4314   int nonstatic_byte_space_count  = 0;
4315   int nonstatic_oop_space_offset = 0;
4316   int nonstatic_word_space_offset = 0;
4317   int nonstatic_short_space_offset = 0;
4318   int nonstatic_byte_space_offset = 0;
4319 
4320   // Try to squeeze some of the fields into the gaps due to
4321   // long/double alignment.
4322   if (nonstatic_double_count > 0) {
4323     int offset = next_nonstatic_double_offset;
4324     next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4325     if (compact_fields && offset != next_nonstatic_double_offset) {
4326       // Allocate available fields into the gap before double field.
4327       int length = next_nonstatic_double_offset - offset;
4328       assert(length == BytesPerInt, "");
4329       nonstatic_word_space_offset = offset;
4330       if (nonstatic_word_count > 0) {
4331         nonstatic_word_count      -= 1;
4332         nonstatic_word_space_count = 1; // Only one will fit
4333         length -= BytesPerInt;
4334         offset += BytesPerInt;
4335       }
4336       nonstatic_short_space_offset = offset;
4337       while (length >= BytesPerShort && nonstatic_short_count > 0) {
4338         nonstatic_short_count       -= 1;
4339         nonstatic_short_space_count += 1;
4340         length -= BytesPerShort;
4341         offset += BytesPerShort;
4342       }
4343       nonstatic_byte_space_offset = offset;
4344       while (length > 0 && nonstatic_byte_count > 0) {
4345         nonstatic_byte_count       -= 1;
4346         nonstatic_byte_space_count += 1;
4347         length -= 1;
4348       }
4349       // Allocate oop field in the gap if there are no other fields for that.
4350       nonstatic_oop_space_offset = offset;
4351       if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4352           allocation_style != 0) { // when oop fields not first
4353         nonstatic_oop_count      -= 1;
4354         nonstatic_oop_space_count = 1; // Only one will fit
4355         length -= heapOopSize;
4356         offset += heapOopSize;
4357       }
4358     }
4359   }
4360 
4361   int next_nonstatic_word_offset = next_nonstatic_double_offset +
4362                                      (nonstatic_double_count * BytesPerLong);
4363   int next_nonstatic_short_offset = next_nonstatic_word_offset +
4364                                       (nonstatic_word_count * BytesPerInt);
4365   int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4366                                      (nonstatic_short_count * BytesPerShort);
4367   int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4368                                        nonstatic_byte_count;
4369 
4370   // let oops jump before padding with this allocation style
4371   if( allocation_style == 1 ) {
4372     next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4373     if( nonstatic_oop_count > 0 ) {
4374       next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4375     }
4376     next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4377   }
4378 
4379   // Aligning embedded value types
4380   // bug below, the current algorithm to layout embedded value types always put them at the
4381   // end of the layout, which doesn't match the different allocation policies the VM is
4382   // supposed to provide => FixMe
4383   // Note also that the current alignment policy is to make each value type starting on a
4384   // 64 bits boundary. This could be optimized later. For instance, it could be nice to
4385   // align value types according to their most constrained internal type.
4386   next_nonstatic_valuetype_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4387   int next_value_type_index = 0;
4388 
4389   // Iterate over fields again and compute correct offsets.
4390   // The field allocation type was temporarily stored in the offset slot.
4391   // oop fields are located before non-oop fields (static and non-static).
4392   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4393 
4394     // skip already laid out fields
4395     if (fs.is_offset_set()) continue;
4396 
4397     // contended instance fields are handled below
4398     if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4399 
4400     int real_offset = 0;
4401     const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4402 
4403     // pack the rest of the fields
4404     switch (atype) {
4405       // Value types in static fields are handled with oops
4406       case STATIC_FLATTENABLE:   // Fallthrough
4407       case STATIC_OOP:
4408         real_offset = next_static_oop_offset;
4409         next_static_oop_offset += heapOopSize;
4410         break;
4411       case STATIC_BYTE:
4412         real_offset = next_static_byte_offset;
4413         next_static_byte_offset += 1;
4414         break;
4415       case STATIC_SHORT:
4416         real_offset = next_static_short_offset;
4417         next_static_short_offset += BytesPerShort;
4418         break;
4419       case STATIC_WORD:
4420         real_offset = next_static_word_offset;
4421         next_static_word_offset += BytesPerInt;
4422         break;
4423       case STATIC_DOUBLE:
4424         real_offset = next_static_double_offset;
4425         next_static_double_offset += BytesPerLong;
4426         break;
4427       case NONSTATIC_FLATTENABLE:
4428         if (fs.is_flattened()) {
4429           Klass* klass = nonstatic_value_type_klasses[next_value_type_index];
4430           assert(klass != NULL, "Klass should have been loaded and resolved earlier");
4431           assert(klass->access_flags().is_value_type(),"Must be a value type");
4432           ValueKlass* vklass = ValueKlass::cast(klass);
4433           real_offset = next_nonstatic_valuetype_offset;
4434           next_nonstatic_valuetype_offset += (vklass->size_helper()) * wordSize - vklass->first_field_offset();
4435           // aligning next value type on a 64 bits boundary
4436           next_nonstatic_valuetype_offset = align_up(next_nonstatic_valuetype_offset, BytesPerLong);
4437           next_value_type_index += 1;
4438 
4439           if (vklass->contains_oops()) { // add flatten oop maps
4440             int diff = real_offset - vklass->first_field_offset();
4441             const OopMapBlock* map = vklass->start_of_nonstatic_oop_maps();
4442             const OopMapBlock* const last_map = map + vklass->nonstatic_oop_map_count();
4443             while (map < last_map) {
4444               nonstatic_oop_maps->add(map->offset() + diff, map->count());
4445               map++;
4446             }
4447           }
4448           break;
4449         } else {
4450           // Fall through
4451         }
4452       case NONSTATIC_OOP:
4453         if( nonstatic_oop_space_count > 0 ) {
4454           real_offset = nonstatic_oop_space_offset;
4455           nonstatic_oop_space_offset += heapOopSize;
4456           nonstatic_oop_space_count  -= 1;
4457         } else {
4458           real_offset = next_nonstatic_oop_offset;
4459           next_nonstatic_oop_offset += heapOopSize;
4460         }
4461         nonstatic_oop_maps->add(real_offset, 1);
4462         break;
4463       case NONSTATIC_BYTE:
4464         if( nonstatic_byte_space_count > 0 ) {
4465           real_offset = nonstatic_byte_space_offset;
4466           nonstatic_byte_space_offset += 1;
4467           nonstatic_byte_space_count  -= 1;
4468         } else {
4469           real_offset = next_nonstatic_byte_offset;
4470           next_nonstatic_byte_offset += 1;
4471         }
4472         break;
4473       case NONSTATIC_SHORT:
4474         if( nonstatic_short_space_count > 0 ) {
4475           real_offset = nonstatic_short_space_offset;
4476           nonstatic_short_space_offset += BytesPerShort;
4477           nonstatic_short_space_count  -= 1;
4478         } else {
4479           real_offset = next_nonstatic_short_offset;
4480           next_nonstatic_short_offset += BytesPerShort;
4481         }
4482         break;
4483       case NONSTATIC_WORD:
4484         if( nonstatic_word_space_count > 0 ) {
4485           real_offset = nonstatic_word_space_offset;
4486           nonstatic_word_space_offset += BytesPerInt;
4487           nonstatic_word_space_count  -= 1;
4488         } else {
4489           real_offset = next_nonstatic_word_offset;
4490           next_nonstatic_word_offset += BytesPerInt;
4491         }
4492         break;
4493       case NONSTATIC_DOUBLE:
4494         real_offset = next_nonstatic_double_offset;
4495         next_nonstatic_double_offset += BytesPerLong;
4496         break;
4497       default:
4498         ShouldNotReachHere();
4499     }
4500     fs.set_offset(real_offset);
4501   }
4502 
4503 
4504   // Handle the contended cases.
4505   //
4506   // Each contended field should not intersect the cache line with another contended field.
4507   // In the absence of alignment information, we end up with pessimistically separating
4508   // the fields with full-width padding.
4509   //
4510   // Additionally, this should not break alignment for the fields, so we round the alignment up
4511   // for each field.
4512   if (nonstatic_contended_count > 0) {
4513 
4514     // if there is at least one contended field, we need to have pre-padding for them
4515     next_nonstatic_padded_offset += ContendedPaddingWidth;
4516 
4517     // collect all contended groups
4518     ResourceBitMap bm(cp->size());
4519     for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4520       // skip already laid out fields
4521       if (fs.is_offset_set()) continue;
4522 
4523       if (fs.is_contended()) {
4524         bm.set_bit(fs.contended_group());
4525       }
4526     }
4527 
4528     int current_group = -1;
4529     while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4530 
4531       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4532 
4533         // skip already laid out fields
4534         if (fs.is_offset_set()) continue;
4535 
4536         // skip non-contended fields and fields from different group
4537         if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4538 
4539         // handle statics below
4540         if (fs.access_flags().is_static()) continue;
4541 
4542         int real_offset = 0;
4543         FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4544 
4545         switch (atype) {
4546           case NONSTATIC_BYTE:
4547             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4548             real_offset = next_nonstatic_padded_offset;
4549             next_nonstatic_padded_offset += 1;
4550             break;
4551 
4552           case NONSTATIC_SHORT:
4553             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4554             real_offset = next_nonstatic_padded_offset;
4555             next_nonstatic_padded_offset += BytesPerShort;
4556             break;
4557 
4558           case NONSTATIC_WORD:
4559             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4560             real_offset = next_nonstatic_padded_offset;
4561             next_nonstatic_padded_offset += BytesPerInt;
4562             break;
4563 
4564           case NONSTATIC_DOUBLE:
4565             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4566             real_offset = next_nonstatic_padded_offset;
4567             next_nonstatic_padded_offset += BytesPerLong;
4568             break;
4569 
4570             // Value types in static fields are handled with oops
4571           case NONSTATIC_FLATTENABLE:
4572             throwValueTypeLimitation(THREAD_AND_LOCATION,
4573                                      "@Contended annotation not supported for value types yet", fs.name(), fs.signature());
4574             return;
4575 
4576           case NONSTATIC_OOP:
4577             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4578             real_offset = next_nonstatic_padded_offset;
4579             next_nonstatic_padded_offset += heapOopSize;
4580             nonstatic_oop_maps->add(real_offset, 1);
4581             break;
4582 
4583           default:
4584             ShouldNotReachHere();
4585         }
4586 
4587         if (fs.contended_group() == 0) {
4588           // Contended group defines the equivalence class over the fields:
4589           // the fields within the same contended group are not inter-padded.
4590           // The only exception is default group, which does not incur the
4591           // equivalence, and so requires intra-padding.
4592           next_nonstatic_padded_offset += ContendedPaddingWidth;
4593         }
4594 
4595         fs.set_offset(real_offset);
4596       } // for
4597 
4598       // Start laying out the next group.
4599       // Note that this will effectively pad the last group in the back;
4600       // this is expected to alleviate memory contention effects for
4601       // subclass fields and/or adjacent object.
4602       // If this was the default group, the padding is already in place.
4603       if (current_group != 0) {
4604         next_nonstatic_padded_offset += ContendedPaddingWidth;
4605       }
4606     }
4607 
4608     // handle static fields
4609   }
4610 
4611   // Entire class is contended, pad in the back.
4612   // This helps to alleviate memory contention effects for subclass fields
4613   // and/or adjacent object.
4614   if (is_contended_class) {
4615     assert(!is_value_type(), "@Contended not supported for value types yet");
4616     next_nonstatic_padded_offset += ContendedPaddingWidth;
4617   }
4618 
4619   int notaligned_nonstatic_fields_end;
4620   if (nonstatic_value_type_count != 0) {
4621     notaligned_nonstatic_fields_end = next_nonstatic_valuetype_offset;
4622   } else {
4623     notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4624   }
4625 
4626   int nonstatic_field_sz_align = heapOopSize;
4627   if (is_value_type()) {
4628     if ((notaligned_nonstatic_fields_end - nonstatic_fields_start) > heapOopSize) {
4629       nonstatic_field_sz_align = BytesPerLong; // value copy of fields only uses jlong copy
4630     }
4631   }
4632   int nonstatic_fields_end      = align_up(notaligned_nonstatic_fields_end, nonstatic_field_sz_align);
4633   int instance_end              = align_up(notaligned_nonstatic_fields_end, wordSize);
4634   int static_fields_end         = align_up(next_static_byte_offset, wordSize);
4635 
4636   int static_field_size         = (static_fields_end -
4637                                    InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4638   nonstatic_field_size          = nonstatic_field_size +
4639                                   (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4640 
4641   int instance_size             = align_object_size(instance_end / wordSize);
4642 
4643   assert(instance_size == align_object_size(align_up(
4644          (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize)
4645          + initial_value_type_padding, wordSize) / wordSize), "consistent layout helper value");
4646 
4647 
4648   // Invariant: nonstatic_field end/start should only change if there are
4649   // nonstatic fields in the class, or if the class is contended. We compare
4650   // against the non-aligned value, so that end alignment will not fail the
4651   // assert without actually having the fields.
4652   assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4653          is_contended_class ||
4654          (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4655 
4656   // Number of non-static oop map blocks allocated at end of klass.
4657   nonstatic_oop_maps->compact(THREAD);
4658 
4659 #ifndef PRODUCT
4660   if ((PrintFieldLayout && !is_value_type()) ||
4661       (PrintValueLayout && (is_value_type() || has_nonstatic_value_fields))) {
4662     print_field_layout(_class_name,
4663           _fields,
4664           cp,
4665           instance_size,
4666           nonstatic_fields_start,
4667           nonstatic_fields_end,
4668           static_fields_end);
4669     nonstatic_oop_maps->print_on(tty);
4670     tty->print("\n");





4671   }
4672 
4673 #endif
4674   // Pass back information needed for InstanceKlass creation
4675   info->oop_map_blocks = nonstatic_oop_maps;
4676   info->instance_size = instance_size;
4677   info->static_field_size = static_field_size;
4678   info->nonstatic_field_size = nonstatic_field_size;
4679   info->has_nonstatic_fields = has_nonstatic_fields;
4680 }
4681 
4682 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik, TRAPS) {
4683   assert(ik != NULL, "invariant");
4684 
4685   const Klass* const super = ik->super();
4686 
4687   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4688   // in which case we don't have to register objects as finalizable
4689   if (!_has_empty_finalizer) {
4690     if (_has_finalizer ||
4691         (super != NULL && super->has_finalizer())) {
4692       ik->set_has_finalizer();
4693     }
4694   }
4695 
4696 #ifdef ASSERT
4697   bool f = false;
4698   const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4699                                            vmSymbols::void_method_signature());
4700   if (m != NULL && !m->is_empty_method()) {
4701       f = true;
4702   }
4703 
4704   // Spec doesn't prevent agent from redefinition of empty finalizer.
4705   // Despite the fact that it's generally bad idea and redefined finalizer
4706   // will not work as expected we shouldn't abort vm in this case
4707   if (!ik->has_redefined_this_or_super()) {
4708     assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4709   }
4710 #endif
4711 
4712   // Check if this klass supports the java.lang.Cloneable interface
4713   if (SystemDictionary::Cloneable_klass_loaded()) {
4714     if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4715       if (ik->is_value()) {
4716         throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support Cloneable");
4717         return;
4718       }
4719       ik->set_is_cloneable();
4720     }
4721   }
4722 
4723   // Check if this klass has a vanilla default constructor
4724   if (super == NULL) {
4725     // java.lang.Object has empty default constructor
4726     ik->set_has_vanilla_constructor();
4727   } else {
4728     if (super->has_vanilla_constructor() &&
4729         _has_vanilla_constructor) {
4730       ik->set_has_vanilla_constructor();
4731     }
4732 #ifdef ASSERT
4733     bool v = false;
4734     if (super->has_vanilla_constructor()) {
4735       const Method* const constructor =
4736         ik->find_method(vmSymbols::object_initializer_name(),
4737                        vmSymbols::void_method_signature());
4738       if (constructor != NULL && constructor->is_vanilla_constructor()) {
4739         v = true;
4740       }
4741     }
4742     assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4743 #endif
4744   }
4745 
4746   // If it cannot be fast-path allocated, set a bit in the layout helper.
4747   // See documentation of InstanceKlass::can_be_fastpath_allocated().
4748   assert(ik->size_helper() > 0, "layout_helper is initialized");
4749   if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4750       || ik->is_abstract() || ik->is_interface()
4751       || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4752       || ik->size_helper() >= FastAllocateSizeLimit) {
4753     // Forbid fast-path allocation.
4754     const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4755     ik->set_layout_helper(lh);
4756   }
4757 }
4758 
4759 bool ClassFileParser::supports_value_types() const {
4760   // Value types are only supported by class file version 55 and later
4761   return _major_version >= JAVA_11_VERSION;
4762 }
4763 
4764 // utility methods for appending an array with check for duplicates
4765 
4766 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4767                               const Array<InstanceKlass*>* const ifs) {
4768   // iterate over new interfaces
4769   for (int i = 0; i < ifs->length(); i++) {
4770     InstanceKlass* const e = ifs->at(i);
4771     assert(e->is_klass() && e->is_interface(), "just checking");
4772     // add new interface
4773     result->append_if_missing(e);
4774   }
4775 }
4776 
4777 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4778                                                             Array<InstanceKlass*>* local_ifs,
4779                                                             ClassLoaderData* loader_data,
4780                                                             TRAPS) {
4781   assert(local_ifs != NULL, "invariant");
4782   assert(loader_data != NULL, "invariant");
4783 
4784   // Compute maximum size for transitive interfaces
4785   int max_transitive_size = 0;
4786   int super_size = 0;
4787   // Add superclass transitive interfaces size
4788   if (super != NULL) {
4789     super_size = super->transitive_interfaces()->length();
4790     max_transitive_size += super_size;
4791   }
4792   // Add local interfaces' super interfaces
4793   const int local_size = local_ifs->length();
4794   for (int i = 0; i < local_size; i++) {
4795     InstanceKlass* const l = local_ifs->at(i);
4796     max_transitive_size += l->transitive_interfaces()->length();
4797   }
4798   // Finally add local interfaces
4799   max_transitive_size += local_size;
4800   // Construct array
4801   if (max_transitive_size == 0) {
4802     // no interfaces, use canonicalized array
4803     return Universe::the_empty_instance_klass_array();
4804   } else if (max_transitive_size == super_size) {
4805     // no new local interfaces added, share superklass' transitive interface array
4806     return super->transitive_interfaces();
4807   } else if (max_transitive_size == local_size) {
4808     // only local interfaces added, share local interface array
4809     return local_ifs;
4810   } else {
4811     ResourceMark rm;
4812     GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4813 
4814     // Copy down from superclass
4815     if (super != NULL) {
4816       append_interfaces(result, super->transitive_interfaces());
4817     }
4818 
4819     // Copy down from local interfaces' superinterfaces
4820     for (int i = 0; i < local_size; i++) {
4821       InstanceKlass* const l = local_ifs->at(i);
4822       append_interfaces(result, l->transitive_interfaces());
4823     }
4824     // Finally add local interfaces
4825     append_interfaces(result, local_ifs);
4826 
4827     // length will be less than the max_transitive_size if duplicates were removed
4828     const int length = result->length();
4829     assert(length <= max_transitive_size, "just checking");
4830     Array<InstanceKlass*>* const new_result =
4831       MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4832     for (int i = 0; i < length; i++) {
4833       InstanceKlass* const e = result->at(i);
4834       assert(e != NULL, "just checking");
4835       new_result->at_put(i, e);
4836     }
4837     return new_result;
4838   }
4839 }
4840 
4841 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4842   assert(this_klass != NULL, "invariant");
4843   const Klass* const super = this_klass->super();
4844   if (super != NULL) {
4845 
4846     // If the loader is not the boot loader then throw an exception if its
4847     // superclass is in package jdk.internal.reflect and its loader is not a
4848     // special reflection class loader
4849     if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4850       assert(super->is_instance_klass(), "super is not instance klass");
4851       PackageEntry* super_package = super->package();
4852       if (super_package != NULL &&
4853           super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4854           !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4855         ResourceMark rm(THREAD);
4856         Exceptions::fthrow(
4857           THREAD_AND_LOCATION,
4858           vmSymbols::java_lang_IllegalAccessError(),
4859           "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4860           this_klass->external_name(),
4861           this_klass->class_loader_data()->loader_name_and_id(),
4862           super->external_name());
4863         return;
4864       }
4865     }
4866 
4867     Reflection::VerifyClassAccessResults vca_result =
4868       Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4869     if (vca_result != Reflection::ACCESS_OK) {
4870       ResourceMark rm(THREAD);
4871       char* msg = Reflection::verify_class_access_msg(this_klass,
4872                                                       InstanceKlass::cast(super),
4873                                                       vca_result);
4874       if (msg == NULL) {
4875         bool same_module = (this_klass->module() == super->module());
4876         Exceptions::fthrow(
4877           THREAD_AND_LOCATION,
4878           vmSymbols::java_lang_IllegalAccessError(),
4879           "class %s cannot access its %ssuperclass %s (%s%s%s)",
4880           this_klass->external_name(),
4881           super->is_abstract() ? "abstract " : "",
4882           super->external_name(),
4883           (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4884           (same_module) ? "" : "; ",
4885           (same_module) ? "" : super->class_in_module_of_loader());
4886       } else {
4887         // Add additional message content.
4888         Exceptions::fthrow(
4889           THREAD_AND_LOCATION,
4890           vmSymbols::java_lang_IllegalAccessError(),
4891           "superclass access check failed: %s",
4892           msg);
4893       }
4894     }
4895   }
4896 }
4897 
4898 
4899 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4900   assert(this_klass != NULL, "invariant");
4901   const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4902   const int lng = local_interfaces->length();
4903   for (int i = lng - 1; i >= 0; i--) {
4904     InstanceKlass* const k = local_interfaces->at(i);
4905     assert (k != NULL && k->is_interface(), "invalid interface");
4906     Reflection::VerifyClassAccessResults vca_result =
4907       Reflection::verify_class_access(this_klass, k, false);
4908     if (vca_result != Reflection::ACCESS_OK) {
4909       ResourceMark rm(THREAD);
4910       char* msg = Reflection::verify_class_access_msg(this_klass,
4911                                                       k,
4912                                                       vca_result);
4913       if (msg == NULL) {
4914         bool same_module = (this_klass->module() == k->module());
4915         Exceptions::fthrow(
4916           THREAD_AND_LOCATION,
4917           vmSymbols::java_lang_IllegalAccessError(),
4918           "class %s cannot access its superinterface %s (%s%s%s)",
4919           this_klass->external_name(),
4920           k->external_name(),
4921           (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4922           (same_module) ? "" : "; ",
4923           (same_module) ? "" : k->class_in_module_of_loader());
4924       } else {
4925         // Add additional message content.
4926         Exceptions::fthrow(
4927           THREAD_AND_LOCATION,
4928           vmSymbols::java_lang_IllegalAccessError(),
4929           "superinterface check failed: %s",
4930           msg);
4931       }
4932     }
4933   }
4934 }
4935 
4936 
4937 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4938   assert(this_klass != NULL, "invariant");
4939   const Array<Method*>* const methods = this_klass->methods();
4940   const int num_methods = methods->length();
4941 
4942   // go thru each method and check if it overrides a final method
4943   for (int index = 0; index < num_methods; index++) {
4944     const Method* const m = methods->at(index);
4945 
4946     // skip private, static, and <init> methods
4947     if ((!m->is_private() && !m->is_static()) &&
4948         (m->name() != vmSymbols::object_initializer_name())) {
4949 
4950       const Symbol* const name = m->name();
4951       const Symbol* const signature = m->signature();
4952       const Klass* k = this_klass->super();
4953       const Method* super_m = NULL;
4954       while (k != NULL) {
4955         // skip supers that don't have final methods.
4956         if (k->has_final_method()) {
4957           // lookup a matching method in the super class hierarchy
4958           super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4959           if (super_m == NULL) {
4960             break; // didn't find any match; get out
4961           }
4962 
4963           if (super_m->is_final() && !super_m->is_static() &&
4964               !super_m->access_flags().is_private()) {
4965             // matching method in super is final, and not static or private
4966             bool can_access = Reflection::verify_member_access(this_klass,
4967                                                                super_m->method_holder(),
4968                                                                super_m->method_holder(),
4969                                                                super_m->access_flags(),
4970                                                               false, false, CHECK);
4971             if (can_access) {
4972               // this class can access super final method and therefore override
4973               ResourceMark rm(THREAD);
4974               Exceptions::fthrow(THREAD_AND_LOCATION,
4975                                  vmSymbols::java_lang_VerifyError(),
4976                                  "class %s overrides final method %s.%s%s",
4977                                  this_klass->external_name(),
4978                                  super_m->method_holder()->external_name(),
4979                                  name->as_C_string(),
4980                                  signature->as_C_string()
4981                                  );
4982               return;
4983             }
4984           }
4985 
4986           // continue to look from super_m's holder's super.
4987           k = super_m->method_holder()->super();
4988           continue;
4989         }
4990 
4991         k = k->super();
4992       }
4993     }
4994   }
4995 }
4996 
4997 
4998 // assumes that this_klass is an interface
4999 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
5000   assert(this_klass != NULL, "invariant");
5001   assert(this_klass->is_interface(), "not an interface");
5002   const Array<Method*>* methods = this_klass->methods();
5003   const int num_methods = methods->length();
5004 
5005   for (int index = 0; index < num_methods; index++) {
5006     const Method* const m = methods->at(index);
5007     // if m is static and not the init method, throw a verify error
5008     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
5009       ResourceMark rm(THREAD);
5010       Exceptions::fthrow(
5011         THREAD_AND_LOCATION,
5012         vmSymbols::java_lang_VerifyError(),
5013         "Illegal static method %s in interface %s",
5014         m->name()->as_C_string(),
5015         this_klass->external_name()
5016       );
5017       return;
5018     }
5019   }
5020 }
5021 
5022 // utility methods for format checking
5023 
5024 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
5025   const bool is_module = (flags & JVM_ACC_MODULE) != 0;
5026   const bool is_value_type = (flags & JVM_ACC_VALUE) != 0;
5027   assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
5028   assert(supports_value_types() || !is_value_type, "JVM_ACC_VALUE should not be set");
5029   if (is_module) {
5030     ResourceMark rm(THREAD);
5031     Exceptions::fthrow(
5032       THREAD_AND_LOCATION,
5033       vmSymbols::java_lang_NoClassDefFoundError(),
5034       "%s is not a class because access_flag ACC_MODULE is set",
5035       _class_name->as_C_string());
5036     return;
5037   }
5038 
5039   if (is_value_type && !EnableValhalla) {
5040     ResourceMark rm(THREAD);
5041     Exceptions::fthrow(
5042       THREAD_AND_LOCATION,
5043       vmSymbols::java_lang_ClassFormatError(),
5044       "Class modifier ACC_VALUE in class %s requires option -XX:+EnableValhalla",
5045       _class_name->as_C_string()
5046     );
5047   }
5048 
5049   if (!_need_verify) { return; }
5050 
5051   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
5052   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
5053   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
5054   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
5055   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
5056   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
5057   const bool major_gte_15  = _major_version >= JAVA_1_5_VERSION;
5058 
5059   if ((is_abstract && is_final) ||
5060       (is_interface && !is_abstract) ||
5061       (is_interface && major_gte_15 && (is_super || is_enum)) ||
5062       (!is_interface && major_gte_15 && is_annotation) ||
5063       (is_value_type && (is_interface || is_abstract || is_enum || !is_final))) {
5064     ResourceMark rm(THREAD);
5065     const char* class_note = "";
5066     if (is_value_type)  class_note = " (an inline class)";
5067     Exceptions::fthrow(
5068       THREAD_AND_LOCATION,
5069       vmSymbols::java_lang_ClassFormatError(),
5070       "Illegal class modifiers in class %s%s: 0x%X",
5071       _class_name->as_C_string(), class_note, flags
5072     );
5073     return;
5074   }
5075 }
5076 
5077 static bool has_illegal_visibility(jint flags) {
5078   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
5079   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5080   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
5081 
5082   return ((is_public && is_protected) ||
5083           (is_public && is_private) ||
5084           (is_protected && is_private));
5085 }
5086 
5087 // A legal major_version.minor_version must be one of the following:
5088 //
5089 //  Major_version >= 45 and major_version < 56, any minor_version.
5090 //  Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
5091 //  Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
5092 //
5093 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
5094   ResourceMark rm(THREAD);
5095   const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
5096   if (major < JAVA_MIN_SUPPORTED_VERSION) {
5097     Exceptions::fthrow(
5098       THREAD_AND_LOCATION,
5099       vmSymbols::java_lang_UnsupportedClassVersionError(),
5100       "%s (class file version %u.%u) was compiled with an invalid major version",
5101       class_name->as_C_string(), major, minor);
5102     return;
5103   }
5104 
5105   if (major > max_version) {
5106     Exceptions::fthrow(
5107       THREAD_AND_LOCATION,
5108       vmSymbols::java_lang_UnsupportedClassVersionError(),
5109       "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5110       "this version of the Java Runtime only recognizes class file versions up to %u.0",
5111       class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
5112     return;
5113   }
5114 
5115   if (major < JAVA_12_VERSION || minor == 0) {
5116     return;
5117   }
5118 
5119   if (minor == JAVA_PREVIEW_MINOR_VERSION) {
5120     if (major != max_version) {
5121       Exceptions::fthrow(
5122         THREAD_AND_LOCATION,
5123         vmSymbols::java_lang_UnsupportedClassVersionError(),
5124         "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
5125         "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
5126         class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
5127       return;
5128     }
5129 
5130     if (!Arguments::enable_preview()) {
5131       Exceptions::fthrow(
5132         THREAD_AND_LOCATION,
5133         vmSymbols::java_lang_UnsupportedClassVersionError(),
5134         "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
5135         class_name->as_C_string(), major, minor);
5136       return;
5137     }
5138 
5139   } else { // minor != JAVA_PREVIEW_MINOR_VERSION
5140     Exceptions::fthrow(
5141         THREAD_AND_LOCATION,
5142         vmSymbols::java_lang_UnsupportedClassVersionError(),
5143         "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
5144         class_name->as_C_string(), major, minor);
5145   }
5146 }
5147 
5148 void ClassFileParser::verify_legal_field_modifiers(jint flags,
5149                                                    bool is_interface,
5150                                                    bool is_value_type,
5151                                                    TRAPS) const {
5152   if (!_need_verify) { return; }
5153 
5154   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
5155   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
5156   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
5157   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
5158   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
5159   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
5160   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
5161   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
5162   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
5163 
5164   bool is_illegal = false;
5165 
5166   if (is_interface) {
5167     if (!is_public || !is_static || !is_final || is_private ||
5168         is_protected || is_volatile || is_transient ||
5169         (major_gte_15 && is_enum)) {
5170       is_illegal = true;
5171     }
5172   } else { // not interface
5173     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
5174       is_illegal = true;
5175     } else {
5176       if (is_value_type && !is_static && !is_final) {
5177         is_illegal = true;
5178       }
5179     }
5180   }
5181 
5182   if (is_illegal) {
5183     ResourceMark rm(THREAD);
5184     Exceptions::fthrow(
5185       THREAD_AND_LOCATION,
5186       vmSymbols::java_lang_ClassFormatError(),
5187       "Illegal field modifiers in class %s: 0x%X",
5188       _class_name->as_C_string(), flags);
5189     return;
5190   }
5191 }
5192 
5193 void ClassFileParser::verify_legal_method_modifiers(jint flags,
5194                                                     bool is_interface,
5195                                                     bool is_value_type,
5196                                                     const Symbol* name,
5197                                                     TRAPS) const {
5198   if (!_need_verify) { return; }
5199 
5200   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
5201   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
5202   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
5203   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
5204   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
5205   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
5206   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
5207   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
5208   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
5209   const bool is_protected    = (flags & JVM_ACC_PROTECTED)    != 0;
5210   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
5211   const bool major_gte_8     = _major_version >= JAVA_8_VERSION;
5212   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
5213 
5214   bool is_illegal = false;
5215 
5216   const char* class_note = "";
5217 
5218   if (is_interface) {
5219     if (major_gte_8) {
5220       // Class file version is JAVA_8_VERSION or later Methods of
5221       // interfaces may set any of the flags except ACC_PROTECTED,
5222       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
5223       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
5224       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
5225           (is_native || is_protected || is_final || is_synchronized) ||
5226           // If a specific method of a class or interface has its
5227           // ACC_ABSTRACT flag set, it must not have any of its
5228           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
5229           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
5230           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
5231           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
5232           (is_abstract && (is_private || is_static || is_strict))) {
5233         is_illegal = true;
5234       }
5235     } else if (major_gte_15) {
5236       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
5237       if (!is_public || is_private || is_protected || is_static || is_final ||
5238           is_synchronized || is_native || !is_abstract || is_strict) {
5239         is_illegal = true;
5240       }
5241     } else {
5242       // Class file version is pre-JAVA_1_5_VERSION
5243       if (!is_public || is_static || is_final || is_native || !is_abstract) {
5244         is_illegal = true;
5245       }
5246     }
5247   } else { // not interface
5248     if (has_illegal_visibility(flags)) {
5249       is_illegal = true;
5250     } else {
5251       if (is_initializer) {
5252         if (is_final || is_synchronized || is_native ||
5253             is_abstract || (major_gte_15 && is_bridge)) {
5254           is_illegal = true;
5255         }
5256         if (!is_static && !is_value_type) {
5257           // OK, an object constructor in a regular class
5258         } else if (is_static && is_value_type) {
5259           // OK, a static init factory in an inline class
5260         } else {
5261           // but no other combinations are allowed
5262           is_illegal = true;
5263           class_note = (is_value_type ? " (an inline class)" : " (not an inline class)");
5264         }
5265       } else { // not initializer
5266         if (is_value_type && is_synchronized && !is_static) {
5267           is_illegal = true;
5268           class_note = " (an inline class)";
5269         } else {
5270           if (is_abstract) {
5271             if ((is_final || is_native || is_private || is_static ||
5272                 (major_gte_15 && (is_synchronized || is_strict)))) {
5273               is_illegal = true;
5274             }
5275           }
5276         }
5277       }
5278     }
5279   }
5280 
5281   if (is_illegal) {
5282     ResourceMark rm(THREAD);
5283     Exceptions::fthrow(
5284       THREAD_AND_LOCATION,
5285       vmSymbols::java_lang_ClassFormatError(),
5286       "Method %s in class %s%s has illegal modifiers: 0x%X",
5287       name->as_C_string(), _class_name->as_C_string(), class_note, flags);
5288     return;
5289   }
5290 }
5291 
5292 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5293                                         int length,
5294                                         TRAPS) const {
5295   assert(_need_verify, "only called when _need_verify is true");
5296   if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5297     classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5298   }
5299 }
5300 
5301 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5302 // In class names, '/' separates unqualified names.  This is verified in this function also.
5303 // Method names also may not contain the characters '<' or '>', unless <init>
5304 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
5305 // method.  Because these names have been checked as special cases before
5306 // calling this method in verify_legal_method_name.
5307 //
5308 // This method is also called from the modular system APIs in modules.cpp
5309 // to verify the validity of module and package names.
5310 bool ClassFileParser::verify_unqualified_name(const char* name,
5311                                               unsigned int length,
5312                                               int type) {
5313   if (length == 0) return false;  // Must have at least one char.
5314   for (const char* p = name; p != name + length; p++) {
5315     switch(*p) {
5316       case '.':
5317       case ';':
5318       case '[':
5319         // do not permit '.', ';', or '['
5320         return false;
5321       case '/':
5322         // check for '//' or leading or trailing '/' which are not legal
5323         // unqualified name must not be empty
5324         if (type == ClassFileParser::LegalClass) {
5325           if (p == name || p+1 >= name+length || *(p+1) == '/') {
5326             return false;
5327           }
5328         } else {
5329           return false;   // do not permit '/' unless it's class name
5330         }
5331         break;
5332       case '<':
5333       case '>':
5334         // do not permit '<' or '>' in method names
5335         if (type == ClassFileParser::LegalMethod) {
5336           return false;
5337         }
5338     }
5339   }
5340   return true;
5341 }
5342 
5343 // Take pointer to a UTF8 byte string (not NUL-terminated).
5344 // Skip over the longest part of the string that could
5345 // be taken as a fieldname. Allow '/' if slash_ok is true.
5346 // Return a pointer to just past the fieldname.
5347 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5348 // being true, we saw consecutive slashes (meaning we were looking for a
5349 // qualified path but found something that was badly-formed).
5350 static const char* skip_over_field_name(const char* const name,
5351                                         bool slash_ok,
5352                                         unsigned int length) {
5353   const char* p;
5354   jboolean last_is_slash = false;
5355   jboolean not_first_ch = false;
5356 
5357   for (p = name; p != name + length; not_first_ch = true) {
5358     const char* old_p = p;
5359     jchar ch = *p;
5360     if (ch < 128) {
5361       p++;
5362       // quick check for ascii
5363       if ((ch >= 'a' && ch <= 'z') ||
5364         (ch >= 'A' && ch <= 'Z') ||
5365         (ch == '_' || ch == '$') ||
5366         (not_first_ch && ch >= '0' && ch <= '9')) {
5367         last_is_slash = false;
5368         continue;
5369       }
5370       if (slash_ok && ch == '/') {
5371         if (last_is_slash) {
5372           return NULL;  // Don't permit consecutive slashes
5373         }
5374         last_is_slash = true;
5375         continue;
5376       }
5377     }
5378     else {
5379       jint unicode_ch;
5380       char* tmp_p = UTF8::next_character(p, &unicode_ch);
5381       p = tmp_p;
5382       last_is_slash = false;
5383       // Check if ch is Java identifier start or is Java identifier part
5384       // 4672820: call java.lang.Character methods directly without generating separate tables.
5385       EXCEPTION_MARK;
5386       // return value
5387       JavaValue result(T_BOOLEAN);
5388       // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5389       JavaCallArguments args;
5390       args.push_int(unicode_ch);
5391 
5392       if (not_first_ch) {
5393         // public static boolean isJavaIdentifierPart(char ch);
5394         JavaCalls::call_static(&result,
5395           SystemDictionary::Character_klass(),
5396           vmSymbols::isJavaIdentifierPart_name(),
5397           vmSymbols::int_bool_signature(),
5398           &args,
5399           THREAD);
5400       } else {
5401         // public static boolean isJavaIdentifierStart(char ch);
5402         JavaCalls::call_static(&result,
5403           SystemDictionary::Character_klass(),
5404           vmSymbols::isJavaIdentifierStart_name(),
5405           vmSymbols::int_bool_signature(),
5406           &args,
5407           THREAD);
5408       }
5409       if (HAS_PENDING_EXCEPTION) {
5410         CLEAR_PENDING_EXCEPTION;
5411         return NULL;
5412       }
5413       if(result.get_jboolean()) {
5414         continue;
5415       }
5416     }
5417     return (not_first_ch) ? old_p : NULL;
5418   }
5419   return (not_first_ch) ? p : NULL;
5420 }
5421 
5422 // Take pointer to a UTF8 byte string (not NUL-terminated).
5423 // Skip over the longest part of the string that could
5424 // be taken as a field signature. Allow "void" if void_ok.
5425 // Return a pointer to just past the signature.
5426 // Return NULL if no legal signature is found.
5427 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5428                                                        bool void_ok,
5429                                                        unsigned int length,
5430                                                        TRAPS) const {
5431   unsigned int array_dim = 0;
5432   while (length > 0) {
5433     switch (signature[0]) {
5434     case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5435     case JVM_SIGNATURE_BOOLEAN:
5436     case JVM_SIGNATURE_BYTE:
5437     case JVM_SIGNATURE_CHAR:
5438     case JVM_SIGNATURE_SHORT:
5439     case JVM_SIGNATURE_INT:
5440     case JVM_SIGNATURE_FLOAT:
5441     case JVM_SIGNATURE_LONG:
5442     case JVM_SIGNATURE_DOUBLE:
5443       return signature + 1;
5444     case JVM_SIGNATURE_VALUETYPE:
5445       // Can't enable this check until JDK upgrades the bytecode generators
5446       // if (_major_version < CONSTANT_CLASS_DESCRIPTORS ) {
5447       //   classfile_parse_error("Class name contains illegal Q-signature "
5448       //                                    "in descriptor in class file %s",
5449       //                                    CHECK_0);
5450       // }
5451       // fall through
5452     case JVM_SIGNATURE_CLASS:
5453     {
5454       if (_major_version < JAVA_1_5_VERSION) {
5455         // Skip over the class name if one is there
5456         const char* const p = skip_over_field_name(signature + 1, true, --length);
5457 
5458         // The next character better be a semicolon
5459         if (p && (p - signature) > 1 && p[0] == ';') {
5460           return p + 1;
5461         }
5462       }
5463       else {
5464         // Skip leading 'L' or 'Q' and ignore first appearance of ';'
5465         signature++;
5466         const char* c = (const char*) memchr(signature, ';', length - 1);
5467         // Format check signature
5468         if (c != NULL) {
5469           int newlen = c - (char*) signature;
5470           bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5471           if (!legal) {
5472             classfile_parse_error("Class name is empty or contains illegal character "
5473                                   "in descriptor in class file %s",
5474                                   CHECK_0);
5475             return NULL;
5476           }
5477           return signature + newlen + 1;
5478         }
5479       }
5480       return NULL;
5481     }
5482     case JVM_SIGNATURE_ARRAY:
5483       array_dim++;
5484       if (array_dim > 255) {
5485         // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5486         classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5487       }
5488       // The rest of what's there better be a legal signature
5489       signature++;
5490       length--;
5491       void_ok = false;
5492       break;
5493     default:
5494       return NULL;
5495     }
5496   }
5497   return NULL;
5498 }
5499 
5500 // Checks if name is a legal class name.
5501 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5502   if (!_need_verify || _relax_verify) { return; }
5503 
5504   assert(name->refcount() > 0, "symbol must be kept alive");
5505   char* bytes = (char*)name->bytes();
5506   unsigned int length = name->utf8_length();
5507   bool legal = false;
5508 
5509   if (length > 0) {
5510     const char* p;
5511     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5512       p = skip_over_field_signature(bytes, false, length, CHECK);
5513       legal = (p != NULL) && ((p - bytes) == (int)length);
5514     } else if (_major_version < JAVA_1_5_VERSION) {
5515       if (bytes[0] != '<') {
5516         p = skip_over_field_name(bytes, true, length);
5517         legal = (p != NULL) && ((p - bytes) == (int)length);
5518       }
5519     } else if (_major_version >= CONSTANT_CLASS_DESCRIPTORS && bytes[length - 1] == ';' ) {
5520       // Support for L...; and Q...; descriptors
5521       legal = verify_unqualified_name(bytes + 1, length - 2, LegalClass);
5522     } else {
5523       // 4900761: relax the constraints based on JSR202 spec
5524       // Class names may be drawn from the entire Unicode character set.
5525       // Identifiers between '/' must be unqualified names.
5526       // The utf8 string has been verified when parsing cpool entries.
5527       legal = verify_unqualified_name(bytes, length, LegalClass);
5528     }
5529   }
5530   if (!legal) {
5531     ResourceMark rm(THREAD);
5532     assert(_class_name != NULL, "invariant");
5533     Exceptions::fthrow(
5534       THREAD_AND_LOCATION,
5535       vmSymbols::java_lang_ClassFormatError(),
5536       "Illegal class name \"%.*s\" in class file %s", length, bytes,
5537       _class_name->as_C_string()
5538     );
5539     return;
5540   }
5541 }
5542 
5543 // Checks if name is a legal field name.
5544 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5545   if (!_need_verify || _relax_verify) { return; }
5546 
5547   char* bytes = (char*)name->bytes();
5548   unsigned int length = name->utf8_length();
5549   bool legal = false;
5550 
5551   if (length > 0) {
5552     if (_major_version < JAVA_1_5_VERSION) {
5553       if (bytes[0] != '<') {
5554         const char* p = skip_over_field_name(bytes, false, length);
5555         legal = (p != NULL) && ((p - bytes) == (int)length);
5556       }
5557     } else {
5558       // 4881221: relax the constraints based on JSR202 spec
5559       legal = verify_unqualified_name(bytes, length, LegalField);
5560     }
5561   }
5562 
5563   if (!legal) {
5564     ResourceMark rm(THREAD);
5565     assert(_class_name != NULL, "invariant");
5566     Exceptions::fthrow(
5567       THREAD_AND_LOCATION,
5568       vmSymbols::java_lang_ClassFormatError(),
5569       "Illegal field name \"%.*s\" in class %s", length, bytes,
5570       _class_name->as_C_string()
5571     );
5572     return;
5573   }
5574 }
5575 
5576 // Checks if name is a legal method name.
5577 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5578   if (!_need_verify || _relax_verify) { return; }
5579 
5580   assert(name != NULL, "method name is null");
5581   char* bytes = (char*)name->bytes();
5582   unsigned int length = name->utf8_length();
5583   bool legal = false;
5584 
5585   if (length > 0) {
5586     if (bytes[0] == '<') {
5587       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5588         legal = true;
5589       }
5590     } else if (_major_version < JAVA_1_5_VERSION) {
5591       const char* p;
5592       p = skip_over_field_name(bytes, false, length);
5593       legal = (p != NULL) && ((p - bytes) == (int)length);
5594     } else {
5595       // 4881221: relax the constraints based on JSR202 spec
5596       legal = verify_unqualified_name(bytes, length, LegalMethod);
5597     }
5598   }
5599 
5600   if (!legal) {
5601     ResourceMark rm(THREAD);
5602     assert(_class_name != NULL, "invariant");
5603     Exceptions::fthrow(
5604       THREAD_AND_LOCATION,
5605       vmSymbols::java_lang_ClassFormatError(),
5606       "Illegal method name \"%.*s\" in class %s", length, bytes,
5607       _class_name->as_C_string()
5608     );
5609     return;
5610   }
5611 }
5612 
5613 
5614 // Checks if signature is a legal field signature.
5615 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5616                                                    const Symbol* signature,
5617                                                    TRAPS) const {
5618   if (!_need_verify) { return; }
5619 
5620   const char* const bytes = (const char* const)signature->bytes();
5621   const unsigned int length = signature->utf8_length();
5622   const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5623 
5624   if (p == NULL || (p - bytes) != (int)length) {
5625     throwIllegalSignature("Field", name, signature, CHECK);
5626   }
5627 }
5628 
5629 // Checks if signature is a legal method signature.
5630 // Returns number of parameters
5631 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5632                                                    const Symbol* signature,
5633                                                    TRAPS) const {
5634   if (!_need_verify) {
5635     // make sure caller's args_size will be less than 0 even for non-static
5636     // method so it will be recomputed in compute_size_of_parameters().
5637     return -2;
5638   }
5639 
5640   // Class initializers cannot have args for class format version >= 51.
5641   if (name == vmSymbols::class_initializer_name() &&
5642       signature != vmSymbols::void_method_signature() &&
5643       _major_version >= JAVA_7_VERSION) {
5644     throwIllegalSignature("Method", name, signature, CHECK_0);
5645     return 0;
5646   }
5647 
5648   unsigned int args_size = 0;
5649   const char* p = (const char*)signature->bytes();
5650   unsigned int length = signature->utf8_length();
5651   const char* nextp;
5652 
5653   // The first character must be a '('
5654   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5655     length--;
5656     // Skip over legal field signatures
5657     nextp = skip_over_field_signature(p, false, length, CHECK_0);
5658     while ((length > 0) && (nextp != NULL)) {
5659       args_size++;
5660       if (p[0] == 'J' || p[0] == 'D') {
5661         args_size++;
5662       }
5663       length -= nextp - p;
5664       p = nextp;
5665       nextp = skip_over_field_signature(p, false, length, CHECK_0);
5666     }
5667     // The first non-signature thing better be a ')'
5668     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5669       length--;
5670       if (name->utf8_length() > 0 && name->char_at(0) == '<') {
5671         // All constructor methods must return void
5672         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5673           return args_size;
5674         }
5675         // All static init methods must return the current class
5676         if ((length >= 3) && (p[length-1] == JVM_SIGNATURE_ENDCLASS)
5677             && name == vmSymbols::object_initializer_name()) {
5678           nextp = skip_over_field_signature(p, true, length, CHECK_0);
5679           if (nextp && ((int)length == (nextp - p))) {
5680             // The actual class will be checked against current class
5681             // when the method is defined (see parse_method).
5682             // A reference to a static init with a bad return type
5683             // will load and verify OK, but will fail to link.
5684             return args_size;
5685           }
5686         }
5687         // The distinction between static factory methods and
5688         // constructors depends on the JVM_ACC_STATIC modifier.
5689         // This distinction must be reflected in a void or non-void
5690         // return. For declared methods, the check is in parse_method.
5691       } else {
5692         // Now we better just have a return value
5693         nextp = skip_over_field_signature(p, true, length, CHECK_0);
5694         if (nextp && ((int)length == (nextp - p))) {
5695           return args_size;
5696         }
5697       }
5698     }
5699   }
5700   // Report error
5701   throwIllegalSignature("Method", name, signature, CHECK_0);
5702   return 0;
5703 }
5704 
5705 int ClassFileParser::static_field_size() const {
5706   assert(_field_info != NULL, "invariant");
5707   return _field_info->static_field_size;
5708 }
5709 
5710 int ClassFileParser::total_oop_map_count() const {
5711   assert(_field_info != NULL, "invariant");
5712   return _field_info->oop_map_blocks->nonstatic_oop_map_count;
5713 }
5714 
5715 jint ClassFileParser::layout_size() const {
5716   assert(_field_info != NULL, "invariant");
5717   return _field_info->instance_size;
5718 }
5719 
5720 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5721                                          const Array<Method*>* methods) {
5722   assert(ik != NULL, "invariant");
5723   assert(methods != NULL, "invariant");
5724 
5725   // Set up Method*::intrinsic_id as soon as we know the names of methods.
5726   // (We used to do this lazily, but now we query it in Rewriter,
5727   // which is eagerly done for every method, so we might as well do it now,
5728   // when everything is fresh in memory.)
5729   const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5730 
5731   if (klass_id != vmSymbols::NO_SID) {
5732     for (int j = 0; j < methods->length(); ++j) {
5733       Method* method = methods->at(j);
5734       method->init_intrinsic_id();
5735 
5736       if (CheckIntrinsics) {
5737         // Check if an intrinsic is defined for method 'method',
5738         // but the method is not annotated with @HotSpotIntrinsicCandidate.
5739         if (method->intrinsic_id() != vmIntrinsics::_none &&
5740             !method->intrinsic_candidate()) {
5741               tty->print("Compiler intrinsic is defined for method [%s], "
5742               "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5743               method->name_and_sig_as_C_string(),
5744               NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5745             );
5746           tty->cr();
5747           DEBUG_ONLY(vm_exit(1));
5748         }
5749         // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5750         // but there is no intrinsic available for it.
5751         if (method->intrinsic_candidate() &&
5752           method->intrinsic_id() == vmIntrinsics::_none) {
5753             tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5754               "but no compiler intrinsic is defined for the method.%s",
5755               method->name_and_sig_as_C_string(),
5756               NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5757             );
5758           tty->cr();
5759           DEBUG_ONLY(vm_exit(1));
5760         }
5761       }
5762     } // end for
5763 
5764 #ifdef ASSERT
5765     if (CheckIntrinsics) {
5766       // Check for orphan methods in the current class. A method m
5767       // of a class C is orphan if an intrinsic is defined for method m,
5768       // but class C does not declare m.
5769       // The check is potentially expensive, therefore it is available
5770       // only in debug builds.
5771 
5772       for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5773         if (vmIntrinsics::_compiledLambdaForm == id) {
5774           // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5775           // generated for the JVM from a LambdaForm and therefore no method
5776           // is defined for it.
5777           continue;
5778         }
5779 
5780         if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5781           // Check if the current class contains a method with the same
5782           // name, flags, signature.
5783           bool match = false;
5784           for (int j = 0; j < methods->length(); ++j) {
5785             const Method* method = methods->at(j);
5786             if (method->intrinsic_id() == id) {
5787               match = true;
5788               break;
5789             }
5790           }
5791 
5792           if (!match) {
5793             char buf[1000];
5794             tty->print("Compiler intrinsic is defined for method [%s], "
5795                        "but the method is not available in class [%s].%s",
5796                         vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5797                                                              buf, sizeof(buf)),
5798                         ik->name()->as_C_string(),
5799                         NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5800             );
5801             tty->cr();
5802             DEBUG_ONLY(vm_exit(1));
5803           }
5804         }
5805       } // end for
5806     } // CheckIntrinsics
5807 #endif // ASSERT
5808   }
5809 }
5810 
5811 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5812   if (_klass != NULL) {
5813     return _klass;
5814   }
5815 
5816   InstanceKlass* const ik =
5817     InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5818 
5819   fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5820 
5821   assert(_klass == ik, "invariant");
5822 
5823 
5824   if (ik->should_store_fingerprint()) {
5825     ik->store_fingerprint(_stream->compute_fingerprint());
5826   }
5827 
5828   ik->set_has_passed_fingerprint_check(false);
5829   if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5830     uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5831     uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5832     if (aot_fp != 0 && aot_fp == fp) {
5833       // This class matches with a class saved in an AOT library
5834       ik->set_has_passed_fingerprint_check(true);
5835     } else {
5836       ResourceMark rm;
5837       log_info(class, fingerprint)("%s :  expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5838                                  ik->external_name(), aot_fp, _stream->compute_fingerprint());
5839     }
5840   }
5841 
5842   if (ik->is_value()) {
5843     ValueKlass* vk = ValueKlass::cast(ik);
5844     oop val = ik->allocate_instance(CHECK_NULL);
5845     vk->set_default_value(val);
5846   }
5847 
5848   return ik;
5849 }
5850 
5851 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5852   assert(ik != NULL, "invariant");
5853 
5854   // Set name and CLD before adding to CLD
5855   ik->set_class_loader_data(_loader_data);
5856   ik->set_name(_class_name);
5857 
5858   // Add all classes to our internal class loader list here,
5859   // including classes in the bootstrap (NULL) class loader.
5860   const bool publicize = !is_internal();
5861 
5862   _loader_data->add_class(ik, publicize);
5863 
5864   set_klass_to_deallocate(ik);
5865 
5866   assert(_field_info != NULL, "invariant");
5867   assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5868   assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->nonstatic_oop_map_count,
5869     "sanity");
5870 
5871   assert(ik->is_instance_klass(), "sanity");
5872   assert(ik->size_helper() == _field_info->instance_size, "sanity");
5873 
5874   // Fill in information already parsed
5875   ik->set_should_verify_class(_need_verify);
5876 
5877   // Not yet: supers are done below to support the new subtype-checking fields
5878   ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5879   ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5880   assert(_fac != NULL, "invariant");
5881   ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_FLATTENABLE]);
5882 
5883   // this transfers ownership of a lot of arrays from
5884   // the parser onto the InstanceKlass*
5885   apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5886 
5887   // note that is not safe to use the fields in the parser from this point on
5888   assert(NULL == _cp, "invariant");
5889   assert(NULL == _fields, "invariant");
5890   assert(NULL == _methods, "invariant");
5891   assert(NULL == _inner_classes, "invariant");
5892   assert(NULL == _nest_members, "invariant");
5893   assert(NULL == _local_interfaces, "invariant");
5894   assert(NULL == _combined_annotations, "invariant");
5895 
5896   if (_has_final_method) {
5897     ik->set_has_final_method();
5898   }
5899 
5900   ik->copy_method_ordering(_method_ordering, CHECK);
5901   // The InstanceKlass::_methods_jmethod_ids cache
5902   // is managed on the assumption that the initial cache
5903   // size is equal to the number of methods in the class. If
5904   // that changes, then InstanceKlass::idnum_can_increment()
5905   // has to be changed accordingly.
5906   ik->set_initial_method_idnum(ik->methods()->length());
5907 
5908   ik->set_this_class_index(_this_class_index);
5909 
5910   if (is_unsafe_anonymous()) {
5911     // _this_class_index is a CONSTANT_Class entry that refers to this
5912     // anonymous class itself. If this class needs to refer to its own methods or
5913     // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5914     // _this_class_index. However, because this class is anonymous (it's
5915     // not stored in SystemDictionary), _this_class_index cannot be resolved
5916     // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5917     // Therefore, we must eagerly resolve _this_class_index now.
5918     ik->constants()->klass_at_put(_this_class_index, ik);
5919   }
5920 
5921   ik->set_minor_version(_minor_version);
5922   ik->set_major_version(_major_version);
5923   ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5924   ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5925 
5926   if (_unsafe_anonymous_host != NULL) {
5927     assert (ik->is_unsafe_anonymous(), "should be the same");
5928     ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5929   }
5930 
5931   // Set PackageEntry for this_klass
5932   oop cl = ik->class_loader();
5933   Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5934   ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5935   ik->set_package(cld, CHECK);
5936 
5937   const Array<Method*>* const methods = ik->methods();
5938   assert(methods != NULL, "invariant");
5939   const int methods_len = methods->length();
5940 
5941   check_methods_for_intrinsics(ik, methods);
5942 
5943   // Fill in field values obtained by parse_classfile_attributes
5944   if (_parsed_annotations->has_any_annotations()) {
5945     _parsed_annotations->apply_to(ik);
5946   }
5947 
5948   apply_parsed_class_attributes(ik);
5949 
5950   // Miranda methods
5951   if ((_num_miranda_methods > 0) ||
5952       // if this class introduced new miranda methods or
5953       (_super_klass != NULL && _super_klass->has_miranda_methods())
5954         // super class exists and this class inherited miranda methods
5955      ) {
5956        ik->set_has_miranda_methods(); // then set a flag
5957   }
5958 
5959   // Fill in information needed to compute superclasses.
5960   ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5961   ik->set_transitive_interfaces(_transitive_interfaces);
5962   _transitive_interfaces = NULL;
5963 
5964   // Initialize itable offset tables
5965   klassItable::setup_itable_offset_table(ik);
5966 
5967   // Compute transitive closure of interfaces this class implements
5968   // Do final class setup
5969   OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks;
5970   if (oop_map_blocks->nonstatic_oop_map_count > 0) {
5971     oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps());
5972   }
5973 
5974   // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5975   set_precomputed_flags(ik, CHECK);
5976 
5977   // check if this class can access its super class
5978   check_super_class_access(ik, CHECK);
5979 
5980   // check if this class can access its superinterfaces
5981   check_super_interface_access(ik, CHECK);
5982 
5983   // check if this class overrides any final method
5984   check_final_method_override(ik, CHECK);
5985 
5986   // reject static interface methods prior to Java 8
5987   if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5988     check_illegal_static_method(ik, CHECK);
5989   }
5990 
5991   // Obtain this_klass' module entry
5992   ModuleEntry* module_entry = ik->module();
5993   assert(module_entry != NULL, "module_entry should always be set");
5994 
5995   // Obtain java.lang.Module
5996   Handle module_handle(THREAD, module_entry->module());
5997 
5998   // Allocate mirror and initialize static fields
5999   // The create_mirror() call will also call compute_modifiers()
6000   java_lang_Class::create_mirror(ik,
6001                                  Handle(THREAD, _loader_data->class_loader()),
6002                                  module_handle,
6003                                  _protection_domain,
6004                                  CHECK);
6005 
6006   assert(_all_mirandas != NULL, "invariant");
6007 
6008   // Generate any default methods - default methods are public interface methods
6009   // that have a default implementation.  This is new with Java 8.
6010   if (_has_nonstatic_concrete_methods) {
6011     DefaultMethods::generate_default_methods(ik,
6012                                              _all_mirandas,
6013                                              CHECK);
6014   }
6015 
6016   // Add read edges to the unnamed modules of the bootstrap and app class loaders.
6017   if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
6018       !module_entry->has_default_read_edges()) {
6019     if (!module_entry->set_has_default_read_edges()) {
6020       // We won a potential race
6021       JvmtiExport::add_default_read_edges(module_handle, THREAD);
6022     }
6023   }
6024 
6025   int nfields = ik->java_fields_count();
6026   if (ik->is_value()) nfields++;
6027   for (int i = 0; i < nfields; i++) {
6028     if (ik->field_access_flags(i) & JVM_ACC_FLATTENABLE) {
6029       Symbol* klass_name = ik->field_signature(i)->fundamental_name(CHECK);
6030       // Value classes must have been pre-loaded
6031       Klass* klass = SystemDictionary::find(klass_name,
6032           Handle(THREAD, ik->class_loader()),
6033           Handle(THREAD, ik->protection_domain()), CHECK);
6034       assert(klass != NULL, "Sanity check");
6035       assert(klass->access_flags().is_value_type(), "Value type expected");
6036       ik->set_value_field_klass(i, klass);
6037       klass_name->decrement_refcount();
6038     } else if (is_value_type() && ((ik->field_access_flags(i) & JVM_ACC_FIELD_INTERNAL) != 0)
6039         && ((ik->field_access_flags(i) & JVM_ACC_STATIC) != 0)) {
6040       ValueKlass::cast(ik)->set_default_value_offset(ik->field_offset(i));
6041     }
6042   }
6043 
6044   if (is_value_type()) {



6045     ValueKlass::cast(ik)->initialize_calling_convention(CHECK);
6046   }
6047 
6048   ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
6049 
6050   if (!is_internal()) {
6051     if (log_is_enabled(Info, class, load)) {
6052       ResourceMark rm;
6053       const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
6054       ik->print_class_load_logging(_loader_data, module_name, _stream);
6055     }
6056 
6057     if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
6058         ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
6059         log_is_enabled(Info, class, preview)) {
6060       ResourceMark rm;
6061       log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
6062                                ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
6063     }
6064 
6065     if (log_is_enabled(Debug, class, resolve))  {
6066       ResourceMark rm;
6067       // print out the superclass.
6068       const char * from = ik->external_name();
6069       if (ik->java_super() != NULL) {
6070         log_debug(class, resolve)("%s %s (super)",
6071                    from,
6072                    ik->java_super()->external_name());
6073       }
6074       // print out each of the interface classes referred to by this class.
6075       const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
6076       if (local_interfaces != NULL) {
6077         const int length = local_interfaces->length();
6078         for (int i = 0; i < length; i++) {
6079           const InstanceKlass* const k = local_interfaces->at(i);
6080           const char * to = k->external_name();
6081           log_debug(class, resolve)("%s %s (interface)", from, to);
6082         }
6083       }
6084     }
6085   }
6086 
6087   JFR_ONLY(INIT_ID(ik);)
6088 
6089   // If we reach here, all is well.
6090   // Now remove the InstanceKlass* from the _klass_to_deallocate field
6091   // in order for it to not be destroyed in the ClassFileParser destructor.
6092   set_klass_to_deallocate(NULL);
6093 
6094   // it's official
6095   set_klass(ik);
6096 
6097   debug_only(ik->verify();)
6098 }
6099 
6100 void ClassFileParser::update_class_name(Symbol* new_class_name) {
6101   // Decrement the refcount in the old name, since we're clobbering it.
6102   _class_name->decrement_refcount();
6103 
6104   _class_name = new_class_name;
6105   // Increment the refcount of the new name.
6106   // Now the ClassFileParser owns this name and will decrement in
6107   // the destructor.
6108   _class_name->increment_refcount();
6109 }
6110 
6111 
6112 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
6113 // package by prepending its host class's package name to its class name and setting
6114 // its _class_name field.
6115 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
6116   ResourceMark rm(THREAD);
6117   assert(strrchr(_class_name->as_C_string(), '/') == NULL,
6118          "Unsafe anonymous class should not be in a package");
6119   const char* host_pkg_name =
6120     ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
6121 
6122   if (host_pkg_name != NULL) {
6123     int host_pkg_len = (int)strlen(host_pkg_name);
6124     int class_name_len = _class_name->utf8_length();
6125     int symbol_len = host_pkg_len + 1 + class_name_len;
6126     char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
6127     int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
6128                          host_pkg_name, class_name_len, _class_name->base());
6129     assert(n == symbol_len, "Unexpected number of characters in string");
6130 
6131     // Decrement old _class_name to avoid leaking.
6132     _class_name->decrement_refcount();
6133 
6134     // Create a symbol and update the anonymous class name.
6135     // The new class name is created with a refcount of one. When installed into the InstanceKlass,
6136     // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
6137     // when the class is unloaded.
6138     _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
6139   }
6140 }
6141 
6142 // If the host class and the anonymous class are in the same package then do
6143 // nothing.  If the anonymous class is in the unnamed package then move it to its
6144 // host's package.  If the classes are in different packages then throw an IAE
6145 // exception.
6146 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
6147   assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
6148 
6149   const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
6150                                                _class_name->utf8_length(), '/');
6151   if (anon_last_slash == NULL) {  // Unnamed package
6152     prepend_host_package_name(_unsafe_anonymous_host, CHECK);
6153   } else {
6154     if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
6155       ResourceMark rm(THREAD);
6156       THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
6157         err_msg("Host class %s and anonymous class %s are in different packages",
6158         _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
6159     }
6160   }
6161 }
6162 
6163 static bool relax_format_check_for(ClassLoaderData* loader_data) {
6164   bool trusted = (loader_data->is_the_null_class_loader_data() ||
6165                   SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
6166   bool need_verify =
6167     // verifyAll
6168     (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
6169     // verifyRemote
6170     (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
6171   return !need_verify;
6172 }
6173 
6174 ClassFileParser::ClassFileParser(ClassFileStream* stream,
6175                                  Symbol* name,
6176                                  ClassLoaderData* loader_data,
6177                                  Handle protection_domain,
6178                                  const InstanceKlass* unsafe_anonymous_host,
6179                                  GrowableArray<Handle>* cp_patches,
6180                                  Publicity pub_level,
6181                                  TRAPS) :
6182   _stream(stream),
6183   _requested_name(name),
6184   _class_name(NULL),
6185   _loader_data(loader_data),
6186   _unsafe_anonymous_host(unsafe_anonymous_host),
6187   _cp_patches(cp_patches),
6188   _num_patched_klasses(0),
6189   _max_num_patched_klasses(0),
6190   _orig_cp_size(0),
6191   _first_patched_klass_resolved_index(0),
6192   _super_klass(),
6193   _cp(NULL),
6194   _fields(NULL),
6195   _methods(NULL),
6196   _inner_classes(NULL),
6197   _nest_members(NULL),
6198   _nest_host(0),
6199   _local_interfaces(NULL),
6200   _transitive_interfaces(NULL),
6201   _combined_annotations(NULL),
6202   _annotations(NULL),
6203   _type_annotations(NULL),
6204   _fields_annotations(NULL),
6205   _fields_type_annotations(NULL),
6206   _klass(NULL),
6207   _klass_to_deallocate(NULL),
6208   _parsed_annotations(NULL),
6209   _fac(NULL),
6210   _field_info(NULL),
6211   _method_ordering(NULL),
6212   _all_mirandas(NULL),
6213   _vtable_size(0),
6214   _itable_size(0),
6215   _num_miranda_methods(0),
6216   _rt(REF_NONE),
6217   _protection_domain(protection_domain),
6218   _access_flags(),
6219   _pub_level(pub_level),
6220   _bad_constant_seen(0),
6221   _synthetic_flag(false),
6222   _sde_length(false),
6223   _sde_buffer(NULL),
6224   _sourcefile_index(0),
6225   _generic_signature_index(0),
6226   _major_version(0),
6227   _minor_version(0),
6228   _this_class_index(0),
6229   _super_class_index(0),
6230   _itfs_len(0),
6231   _java_fields_count(0),
6232   _need_verify(false),
6233   _relax_verify(false),
6234   _has_nonstatic_concrete_methods(false),
6235   _declares_nonstatic_concrete_methods(false),
6236   _has_final_method(false),
6237   _has_flattenable_fields(false),
6238   _has_finalizer(false),
6239   _has_empty_finalizer(false),
6240   _has_vanilla_constructor(false),
6241   _max_bootstrap_specifier_index(-1) {
6242 
6243   _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
6244   _class_name->increment_refcount();
6245 
6246   assert(THREAD->is_Java_thread(), "invariant");
6247   assert(_loader_data != NULL, "invariant");
6248   assert(stream != NULL, "invariant");
6249   assert(_stream != NULL, "invariant");
6250   assert(_stream->buffer() == _stream->current(), "invariant");
6251   assert(_class_name != NULL, "invariant");
6252   assert(0 == _access_flags.as_int(), "invariant");
6253 
6254   // Figure out whether we can skip format checking (matching classic VM behavior)
6255   if (DumpSharedSpaces) {
6256     // verify == true means it's a 'remote' class (i.e., non-boot class)
6257     // Verification decision is based on BytecodeVerificationRemote flag
6258     // for those classes.
6259     _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
6260                                               BytecodeVerificationLocal;
6261   }
6262   else {
6263     _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
6264                                                stream->need_verify());
6265   }
6266   if (_cp_patches != NULL) {
6267     int len = _cp_patches->length();
6268     for (int i=0; i<len; i++) {
6269       if (has_cp_patch_at(i)) {
6270         Handle patch = cp_patch_at(i);
6271         if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
6272           // We need to append the names of the patched classes to the end of the constant pool,
6273           // because a patched class may have a Utf8 name that's not already included in the
6274           // original constant pool. These class names are used when patch_constant_pool()
6275           // calls patch_class().
6276           //
6277           // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
6278           // At this point, we don't know the tag for index i yet, because we haven't parsed the
6279           // constant pool. So we can only assume the worst -- every String is used to patch a Class.
6280           _max_num_patched_klasses++;
6281         }
6282       }
6283     }
6284   }
6285 
6286   // synch back verification state to stream
6287   stream->set_verify(_need_verify);
6288 
6289   // Check if verification needs to be relaxed for this class file
6290   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
6291   _relax_verify = relax_format_check_for(_loader_data);
6292 
6293   parse_stream(stream, CHECK);
6294 
6295   post_process_parsed_stream(stream, _cp, CHECK);
6296 }
6297 
6298 void ClassFileParser::clear_class_metadata() {
6299   // metadata created before the instance klass is created.  Must be
6300   // deallocated if classfile parsing returns an error.
6301   _cp = NULL;
6302   _fields = NULL;
6303   _methods = NULL;
6304   _inner_classes = NULL;
6305   _nest_members = NULL;
6306   _local_interfaces = NULL;
6307   _combined_annotations = NULL;
6308   _annotations = _type_annotations = NULL;
6309   _fields_annotations = _fields_type_annotations = NULL;
6310 }
6311 
6312 // Destructor to clean up
6313 ClassFileParser::~ClassFileParser() {
6314   _class_name->decrement_refcount();
6315 
6316   if (_cp != NULL) {
6317     MetadataFactory::free_metadata(_loader_data, _cp);
6318   }
6319   if (_fields != NULL) {
6320     MetadataFactory::free_array<u2>(_loader_data, _fields);
6321   }
6322 
6323   if (_methods != NULL) {
6324     // Free methods
6325     InstanceKlass::deallocate_methods(_loader_data, _methods);
6326   }
6327 
6328   // beware of the Universe::empty_blah_array!!
6329   if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6330     MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6331   }
6332 
6333   if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
6334     MetadataFactory::free_array<u2>(_loader_data, _nest_members);
6335   }
6336 
6337   // Free interfaces
6338   InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6339                                        _local_interfaces, _transitive_interfaces);
6340 
6341   if (_combined_annotations != NULL) {
6342     // After all annotations arrays have been created, they are installed into the
6343     // Annotations object that will be assigned to the InstanceKlass being created.
6344 
6345     // Deallocate the Annotations object and the installed annotations arrays.
6346     _combined_annotations->deallocate_contents(_loader_data);
6347 
6348     // If the _combined_annotations pointer is non-NULL,
6349     // then the other annotations fields should have been cleared.
6350     assert(_annotations             == NULL, "Should have been cleared");
6351     assert(_type_annotations        == NULL, "Should have been cleared");
6352     assert(_fields_annotations      == NULL, "Should have been cleared");
6353     assert(_fields_type_annotations == NULL, "Should have been cleared");
6354   } else {
6355     // If the annotations arrays were not installed into the Annotations object,
6356     // then they have to be deallocated explicitly.
6357     MetadataFactory::free_array<u1>(_loader_data, _annotations);
6358     MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
6359     Annotations::free_contents(_loader_data, _fields_annotations);
6360     Annotations::free_contents(_loader_data, _fields_type_annotations);
6361   }
6362 
6363   clear_class_metadata();
6364   _transitive_interfaces = NULL;
6365 
6366   // deallocate the klass if already created.  Don't directly deallocate, but add
6367   // to the deallocate list so that the klass is removed from the CLD::_klasses list
6368   // at a safepoint.
6369   if (_klass_to_deallocate != NULL) {
6370     _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6371   }
6372 }
6373 
6374 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6375                                    TRAPS) {
6376 
6377   assert(stream != NULL, "invariant");
6378   assert(_class_name != NULL, "invariant");
6379 
6380   // BEGIN STREAM PARSING
6381   stream->guarantee_more(8, CHECK);  // magic, major, minor
6382   // Magic value
6383   const u4 magic = stream->get_u4_fast();
6384   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6385                      "Incompatible magic value %u in class file %s",
6386                      magic, CHECK);
6387 
6388   // Version numbers
6389   _minor_version = stream->get_u2_fast();
6390   _major_version = stream->get_u2_fast();
6391 
6392   if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
6393     ResourceMark rm;
6394     warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
6395             _major_version,  _minor_version, _class_name->as_C_string());
6396     Exceptions::fthrow(
6397       THREAD_AND_LOCATION,
6398       vmSymbols::java_lang_UnsupportedClassVersionError(),
6399       "Unsupported major.minor version for dump time %u.%u",
6400       _major_version,
6401       _minor_version);
6402   }
6403 
6404   // Check version numbers - we check this even with verifier off
6405   verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6406 
6407   stream->guarantee_more(3, CHECK); // length, first cp tag
6408   u2 cp_size = stream->get_u2_fast();
6409 
6410   guarantee_property(
6411     cp_size >= 1, "Illegal constant pool size %u in class file %s",
6412     cp_size, CHECK);
6413 
6414   _orig_cp_size = cp_size;
6415   if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6416     THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6417   }
6418   cp_size += _max_num_patched_klasses;
6419 
6420   _cp = ConstantPool::allocate(_loader_data,
6421                                cp_size,
6422                                CHECK);
6423 
6424   ConstantPool* const cp = _cp;
6425 
6426   parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6427 
6428   assert(cp_size == (const u2)cp->length(), "invariant");
6429 
6430   // ACCESS FLAGS
6431   stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
6432 
6433   jint recognized_modifiers = JVM_RECOGNIZED_CLASS_MODIFIERS;
6434   // JVM_ACC_MODULE is defined in JDK-9 and later.
6435   if (_major_version >= JAVA_9_VERSION) {
6436     recognized_modifiers |= JVM_ACC_MODULE;
6437   }
6438   // JVM_ACC_VALUE is defined for class file version 55 and later
6439   if (supports_value_types()) {
6440     recognized_modifiers |= JVM_ACC_VALUE;
6441   }
6442 
6443   // Access flags
6444   jint flags = stream->get_u2_fast() & recognized_modifiers;
6445 
6446   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6447     // Set abstract bit for old class files for backward compatibility
6448     flags |= JVM_ACC_ABSTRACT;
6449   }
6450 
6451   verify_legal_class_modifiers(flags, CHECK);
6452 
6453   short bad_constant = class_bad_constant_seen();
6454   if (bad_constant != 0) {
6455     // Do not throw CFE until after the access_flags are checked because if
6456     // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6457     classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6458   }
6459 
6460   _access_flags.set_flags(flags);
6461 
6462   // This class and superclass
6463   _this_class_index = stream->get_u2_fast();
6464   check_property(
6465     valid_cp_range(_this_class_index, cp_size) &&
6466       cp->tag_at(_this_class_index).is_unresolved_klass(),
6467     "Invalid this class index %u in constant pool in class file %s",
6468     _this_class_index, CHECK);
6469 
6470   Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6471   assert(class_name_in_cp != NULL, "class_name can't be null");
6472 
6473   // Update _class_name to reflect the name in the constant pool
6474   update_class_name(class_name_in_cp);
6475 
6476   // Don't need to check whether this class name is legal or not.
6477   // It has been checked when constant pool is parsed.
6478   // However, make sure it is not an array type.
6479   if (_need_verify) {
6480     guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6481                        "Bad class name in class file %s",
6482                        CHECK);
6483   }
6484 
6485   // Checks if name in class file matches requested name
6486   if (_requested_name != NULL && _requested_name != _class_name) {
6487     ResourceMark rm(THREAD);
6488     Exceptions::fthrow(
6489       THREAD_AND_LOCATION,
6490       vmSymbols::java_lang_NoClassDefFoundError(),
6491       "%s (wrong name: %s)",
6492       _class_name->as_C_string(),
6493       _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6494     );
6495     return;
6496   }
6497 
6498   // if this is an anonymous class fix up its name if it's in the unnamed
6499   // package.  Otherwise, throw IAE if it is in a different package than
6500   // its host class.
6501   if (_unsafe_anonymous_host != NULL) {
6502     fix_unsafe_anonymous_class_name(CHECK);
6503   }
6504 
6505   // Verification prevents us from creating names with dots in them, this
6506   // asserts that that's the case.
6507   assert(is_internal_format(_class_name), "external class name format used internally");
6508 
6509   if (!is_internal()) {
6510     LogTarget(Debug, class, preorder) lt;
6511     if (lt.is_enabled()){
6512       ResourceMark rm(THREAD);
6513       LogStream ls(lt);
6514       ls.print("%s", _class_name->as_klass_external_name());
6515       if (stream->source() != NULL) {
6516         ls.print(" source: %s", stream->source());
6517       }
6518       ls.cr();
6519     }
6520 
6521 #if INCLUDE_CDS
6522     if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6523       if (!ClassLoader::has_jrt_entry()) {
6524         warning("DumpLoadedClassList and CDS are not supported in exploded build");
6525         DumpLoadedClassList = NULL;
6526       } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6527                  _unsafe_anonymous_host == NULL) {
6528         // Only dump the classes that can be stored into CDS archive.
6529         // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6530         oop class_loader = _loader_data->class_loader();
6531         ResourceMark rm(THREAD);
6532         bool skip = false;
6533         if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6534           // For the boot and platform class loaders, skip classes that are not found in the
6535           // java runtime image, such as those found in the --patch-module entries.
6536           // These classes can't be loaded from the archive during runtime.
6537           if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6538             skip = true;
6539           }
6540 
6541           if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6542             // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6543             // as they can be loaded from the archive during runtime.
6544             skip = false;
6545           }
6546         }
6547         if (skip) {
6548           tty->print_cr("skip writing class %s from source %s to classlist file",
6549             _class_name->as_C_string(), stream->source());
6550         } else {
6551           classlist_file->print_cr("%s", _class_name->as_C_string());
6552           classlist_file->flush();
6553         }
6554       }
6555     }
6556 #endif
6557   }
6558 
6559   // SUPERKLASS
6560   _super_class_index = stream->get_u2_fast();
6561   _super_klass = parse_super_class(cp,
6562                                    _super_class_index,
6563                                    _need_verify,
6564                                    CHECK);
6565 
6566   // Interfaces
6567   _itfs_len = stream->get_u2_fast();
6568   parse_interfaces(stream,
6569                    _itfs_len,
6570                    cp,
6571                    &_has_nonstatic_concrete_methods,
6572                    CHECK);
6573 
6574   assert(_local_interfaces != NULL, "invariant");
6575 
6576   // Fields (offsets are filled in later)
6577   _fac = new FieldAllocationCount();
6578   parse_fields(stream,
6579                _access_flags.is_interface(),
6580                _access_flags.is_value_type(),
6581                _fac,
6582                cp,
6583                cp_size,
6584                &_java_fields_count,
6585                CHECK);
6586 
6587   assert(_fields != NULL, "invariant");
6588 
6589   // Methods
6590   AccessFlags promoted_flags;
6591   parse_methods(stream,
6592                 _access_flags.is_interface(),
6593                 _access_flags.is_value_type(),
6594                 &promoted_flags,
6595                 &_has_final_method,
6596                 &_declares_nonstatic_concrete_methods,
6597                 CHECK);
6598 
6599   assert(_methods != NULL, "invariant");
6600 
6601   // promote flags from parse_methods() to the klass' flags
6602   _access_flags.add_promoted_flags(promoted_flags.as_int());
6603 
6604   if (_declares_nonstatic_concrete_methods) {
6605     _has_nonstatic_concrete_methods = true;
6606   }
6607 
6608   // Additional attributes/annotations
6609   _parsed_annotations = new ClassAnnotationCollector();
6610   parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6611 
6612   assert(_inner_classes != NULL, "invariant");
6613 
6614   // Finalize the Annotations metadata object,
6615   // now that all annotation arrays have been created.
6616   create_combined_annotations(CHECK);
6617 
6618   // Make sure this is the end of class file stream
6619   guarantee_property(stream->at_eos(),
6620                      "Extra bytes at the end of class file %s",
6621                      CHECK);
6622 
6623   // all bytes in stream read and parsed
6624 }
6625 
6626 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6627                                                  ConstantPool* cp,
6628                                                  TRAPS) {
6629   assert(stream != NULL, "invariant");
6630   assert(stream->at_eos(), "invariant");
6631   assert(cp != NULL, "invariant");
6632   assert(_loader_data != NULL, "invariant");
6633 
6634   if (_class_name == vmSymbols::java_lang_Object()) {
6635     check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6636                    "java.lang.Object cannot implement an interface in class file %s",
6637                    CHECK);
6638   }
6639   // We check super class after class file is parsed and format is checked
6640   if (_super_class_index > 0 && NULL ==_super_klass) {
6641     Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6642     if (_access_flags.is_interface()) {
6643       // Before attempting to resolve the superclass, check for class format
6644       // errors not checked yet.
6645       guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6646         "Interfaces must have java.lang.Object as superclass in class file %s",
6647         CHECK);
6648     }
6649     Handle loader(THREAD, _loader_data->class_loader());
6650     _super_klass = (const InstanceKlass*)
6651                        SystemDictionary::resolve_super_or_fail(_class_name,
6652                                                                super_class_name,
6653                                                                loader,
6654                                                                _protection_domain,
6655                                                                true,
6656                                                                CHECK);
6657   }
6658 
6659   if (_super_klass != NULL) {
6660     if (_super_klass->has_nonstatic_concrete_methods()) {
6661       _has_nonstatic_concrete_methods = true;
6662     }
6663 
6664     if (_super_klass->is_interface()) {
6665       ResourceMark rm(THREAD);
6666       Exceptions::fthrow(
6667         THREAD_AND_LOCATION,
6668         vmSymbols::java_lang_IncompatibleClassChangeError(),
6669         "class %s has interface %s as super class",
6670         _class_name->as_klass_external_name(),
6671         _super_klass->external_name()
6672       );
6673       return;
6674     }
6675 
6676     // For a value class, only java/lang/Object is an acceptable super class
6677     if (_access_flags.get_flags() & JVM_ACC_VALUE) {
6678       guarantee_property(_super_klass->name() == vmSymbols::java_lang_Object(),
6679         "Value type must have java.lang.Object as superclass in class file %s",
6680         CHECK);
6681     }
6682 
6683     // Make sure super class is not final
6684     if (_super_klass->is_final()) {
6685       THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6686     }
6687   }
6688 
6689   // Compute the transitive list of all unique interfaces implemented by this class
6690   _transitive_interfaces =
6691     compute_transitive_interfaces(_super_klass,
6692                                   _local_interfaces,
6693                                   _loader_data,
6694                                   CHECK);
6695 
6696   assert(_transitive_interfaces != NULL, "invariant");
6697 
6698   // sort methods
6699   _method_ordering = sort_methods(_methods);
6700 
6701   _all_mirandas = new GrowableArray<Method*>(20);
6702 
6703   Handle loader(THREAD, _loader_data->class_loader());
6704   klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6705                                                     &_num_miranda_methods,
6706                                                     _all_mirandas,
6707                                                     _super_klass,
6708                                                     _methods,
6709                                                     _access_flags,
6710                                                     _major_version,
6711                                                     loader,
6712                                                     _class_name,
6713                                                     _local_interfaces,
6714                                                     CHECK);
6715 
6716   // Size of Java itable (in words)
6717   _itable_size = _access_flags.is_interface() ? 0 :
6718     klassItable::compute_itable_size(_transitive_interfaces);
6719 
6720   assert(_fac != NULL, "invariant");
6721   assert(_parsed_annotations != NULL, "invariant");
6722 
6723 
6724   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
6725     if (fs.is_flattenable()) {
6726       // Pre-load value class
6727       Klass* klass = SystemDictionary::resolve_flattenable_field_or_fail(&fs,
6728           Handle(THREAD, _loader_data->class_loader()),
6729           _protection_domain, true, CHECK);
6730       assert(klass != NULL, "Sanity check");
6731       assert(klass->access_flags().is_value_type(), "Value type expected");
6732       _has_flattenable_fields = true;
6733     }
6734   }
6735 
6736   _field_info = new FieldLayoutInfo();











6737   layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);

6738 
6739   // Compute reference typ
6740   _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6741 
6742 }
6743 
6744 void ClassFileParser::set_klass(InstanceKlass* klass) {
6745 
6746 #ifdef ASSERT
6747   if (klass != NULL) {
6748     assert(NULL == _klass, "leaking?");
6749   }
6750 #endif
6751 
6752   _klass = klass;
6753 }
6754 
6755 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6756 
6757 #ifdef ASSERT
6758   if (klass != NULL) {
6759     assert(NULL == _klass_to_deallocate, "leaking?");
6760   }
6761 #endif
6762 
6763   _klass_to_deallocate = klass;
6764 }
6765 
6766 // Caller responsible for ResourceMark
6767 // clone stream with rewound position
6768 const ClassFileStream* ClassFileParser::clone_stream() const {
6769   assert(_stream != NULL, "invariant");
6770 
6771   return _stream->clone();
6772 }
6773 
6774 // ----------------------------------------------------------------------------
6775 // debugging
6776 
6777 #ifdef ASSERT
6778 
6779 // return true if class_name contains no '.' (internal format is '/')
6780 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6781   if (class_name != NULL) {
6782     ResourceMark rm;
6783     char* name = class_name->as_C_string();
6784     return strchr(name, '.') == NULL;
6785   } else {
6786     return true;
6787   }
6788 }
6789 
6790 #endif
--- EOF ---