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 "prims/jvmtiExport.hpp"
  60 #include "prims/jvmtiThreadState.hpp"
  61 #include "runtime/arguments.hpp"
  62 #include "runtime/handles.inline.hpp"
  63 #include "runtime/javaCalls.hpp"
  64 #include "runtime/os.hpp"
  65 #include "runtime/perfData.hpp"
  66 #include "runtime/reflection.hpp"
  67 #include "runtime/safepointVerifiers.hpp"
  68 #include "runtime/signature.hpp"
  69 #include "runtime/timer.hpp"
  70 #include "services/classLoadingService.hpp"
  71 #include "services/threadService.hpp"
  72 #include "utilities/align.hpp"
  73 #include "utilities/bitMap.inline.hpp"
  74 #include "utilities/copy.hpp"
  75 #include "utilities/exceptions.hpp"
  76 #include "utilities/globalDefinitions.hpp"
  77 #include "utilities/growableArray.hpp"
  78 #include "utilities/macros.hpp"
  79 #include "utilities/ostream.hpp"
  80 #include "utilities/resourceHash.hpp"
  81 #include "utilities/utf8.hpp"
  82 
  83 #if INCLUDE_CDS
  84 #include "classfile/systemDictionaryShared.hpp"
  85 #endif
  86 #if INCLUDE_JFR
  87 #include "jfr/support/jfrTraceIdExtension.hpp"
  88 #endif
  89 
  90 // We generally try to create the oops directly when parsing, rather than
  91 // allocating temporary data structures and copying the bytes twice. A
  92 // temporary area is only needed when parsing utf8 entries in the constant
  93 // pool and when parsing line number tables.
  94 
  95 // We add assert in debug mode when class format is not checked.
  96 
  97 #define JAVA_CLASSFILE_MAGIC              0xCAFEBABE
  98 #define JAVA_MIN_SUPPORTED_VERSION        45
  99 #define JAVA_PREVIEW_MINOR_VERSION        65535
 100 
 101 // Used for two backward compatibility reasons:
 102 // - to check for new additions to the class file format in JDK1.5
 103 // - to check for bug fixes in the format checker in JDK1.5
 104 #define JAVA_1_5_VERSION                  49
 105 
 106 // Used for backward compatibility reasons:
 107 // - to check for javac bug fixes that happened after 1.5
 108 // - also used as the max version when running in jdk6
 109 #define JAVA_6_VERSION                    50
 110 
 111 // Used for backward compatibility reasons:
 112 // - to disallow argument and require ACC_STATIC for <clinit> methods
 113 #define JAVA_7_VERSION                    51
 114 
 115 // Extension method support.
 116 #define JAVA_8_VERSION                    52
 117 
 118 #define JAVA_9_VERSION                    53
 119 
 120 #define JAVA_10_VERSION                   54
 121 
 122 #define JAVA_11_VERSION                   55
 123 
 124 #define JAVA_12_VERSION                   56
 125 
 126 #define JAVA_13_VERSION                   57
 127 
 128 #define JAVA_14_VERSION                   58
 129 
 130 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
 131   assert((bad_constant == JVM_CONSTANT_Module ||
 132           bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
 133          "Unexpected bad constant pool entry");
 134   if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
 135 }
 136 
 137 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
 138                                                   ConstantPool* cp,
 139                                                   const int length,
 140                                                   TRAPS) {
 141   assert(stream != NULL, "invariant");
 142   assert(cp != NULL, "invariant");
 143 
 144   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
 145   // this function (_current can be allocated in a register, with scalar
 146   // replacement of aggregates). The _current pointer is copied back to
 147   // stream() when this function returns. DON'T call another method within
 148   // this method that uses stream().
 149   const ClassFileStream cfs1 = *stream;
 150   const ClassFileStream* const cfs = &cfs1;
 151 
 152   assert(cfs->allocated_on_stack(), "should be local");
 153   debug_only(const u1* const old_current = stream->current();)
 154 
 155   // Used for batching symbol allocations.
 156   const char* names[SymbolTable::symbol_alloc_batch_size];
 157   int lengths[SymbolTable::symbol_alloc_batch_size];
 158   int indices[SymbolTable::symbol_alloc_batch_size];
 159   unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
 160   int names_count = 0;
 161 
 162   // parsing  Index 0 is unused
 163   for (int index = 1; index < length; index++) {
 164     // Each of the following case guarantees one more byte in the stream
 165     // for the following tag or the access_flags following constant pool,
 166     // so we don't need bounds-check for reading tag.
 167     const u1 tag = cfs->get_u1_fast();
 168     switch (tag) {
 169       case JVM_CONSTANT_Class : {
 170         cfs->guarantee_more(3, CHECK);  // name_index, tag/access_flags
 171         const u2 name_index = cfs->get_u2_fast();
 172         cp->klass_index_at_put(index, name_index);
 173         break;
 174       }
 175       case JVM_CONSTANT_Fieldref: {
 176         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 177         const u2 class_index = cfs->get_u2_fast();
 178         const u2 name_and_type_index = cfs->get_u2_fast();
 179         cp->field_at_put(index, class_index, name_and_type_index);
 180         break;
 181       }
 182       case JVM_CONSTANT_Methodref: {
 183         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 184         const u2 class_index = cfs->get_u2_fast();
 185         const u2 name_and_type_index = cfs->get_u2_fast();
 186         cp->method_at_put(index, class_index, name_and_type_index);
 187         break;
 188       }
 189       case JVM_CONSTANT_InterfaceMethodref: {
 190         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 191         const u2 class_index = cfs->get_u2_fast();
 192         const u2 name_and_type_index = cfs->get_u2_fast();
 193         cp->interface_method_at_put(index, class_index, name_and_type_index);
 194         break;
 195       }
 196       case JVM_CONSTANT_String : {
 197         cfs->guarantee_more(3, CHECK);  // string_index, tag/access_flags
 198         const u2 string_index = cfs->get_u2_fast();
 199         cp->string_index_at_put(index, string_index);
 200         break;
 201       }
 202       case JVM_CONSTANT_MethodHandle :
 203       case JVM_CONSTANT_MethodType: {
 204         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 205           classfile_parse_error(
 206             "Class file version does not support constant tag %u in class file %s",
 207             tag, CHECK);
 208         }
 209         if (tag == JVM_CONSTANT_MethodHandle) {
 210           cfs->guarantee_more(4, CHECK);  // ref_kind, method_index, tag/access_flags
 211           const u1 ref_kind = cfs->get_u1_fast();
 212           const u2 method_index = cfs->get_u2_fast();
 213           cp->method_handle_index_at_put(index, ref_kind, method_index);
 214         }
 215         else if (tag == JVM_CONSTANT_MethodType) {
 216           cfs->guarantee_more(3, CHECK);  // signature_index, tag/access_flags
 217           const u2 signature_index = cfs->get_u2_fast();
 218           cp->method_type_index_at_put(index, signature_index);
 219         }
 220         else {
 221           ShouldNotReachHere();
 222         }
 223         break;
 224       }
 225       case JVM_CONSTANT_Dynamic : {
 226         if (_major_version < Verifier::DYNAMICCONSTANT_MAJOR_VERSION) {
 227           classfile_parse_error(
 228               "Class file version does not support constant tag %u in class file %s",
 229               tag, CHECK);
 230         }
 231         cfs->guarantee_more(5, CHECK);  // bsm_index, nt, tag/access_flags
 232         const u2 bootstrap_specifier_index = cfs->get_u2_fast();
 233         const u2 name_and_type_index = cfs->get_u2_fast();
 234         if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
 235           _max_bootstrap_specifier_index = (int) bootstrap_specifier_index;  // collect for later
 236         }
 237         cp->dynamic_constant_at_put(index, bootstrap_specifier_index, name_and_type_index);
 238         break;
 239       }
 240       case JVM_CONSTANT_InvokeDynamic : {
 241         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 242           classfile_parse_error(
 243               "Class file version does not support constant tag %u in class file %s",
 244               tag, CHECK);
 245         }
 246         cfs->guarantee_more(5, CHECK);  // bsm_index, nt, tag/access_flags
 247         const u2 bootstrap_specifier_index = cfs->get_u2_fast();
 248         const u2 name_and_type_index = cfs->get_u2_fast();
 249         if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
 250           _max_bootstrap_specifier_index = (int) bootstrap_specifier_index;  // collect for later
 251         }
 252         cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
 253         break;
 254       }
 255       case JVM_CONSTANT_Integer: {
 256         cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 257         const u4 bytes = cfs->get_u4_fast();
 258         cp->int_at_put(index, (jint)bytes);
 259         break;
 260       }
 261       case JVM_CONSTANT_Float: {
 262         cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 263         const u4 bytes = cfs->get_u4_fast();
 264         cp->float_at_put(index, *(jfloat*)&bytes);
 265         break;
 266       }
 267       case JVM_CONSTANT_Long: {
 268         // A mangled type might cause you to overrun allocated memory
 269         guarantee_property(index + 1 < length,
 270                            "Invalid constant pool entry %u in class file %s",
 271                            index,
 272                            CHECK);
 273         cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 274         const u8 bytes = cfs->get_u8_fast();
 275         cp->long_at_put(index, bytes);
 276         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 277         break;
 278       }
 279       case JVM_CONSTANT_Double: {
 280         // A mangled type might cause you to overrun allocated memory
 281         guarantee_property(index+1 < length,
 282                            "Invalid constant pool entry %u in class file %s",
 283                            index,
 284                            CHECK);
 285         cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 286         const u8 bytes = cfs->get_u8_fast();
 287         cp->double_at_put(index, *(jdouble*)&bytes);
 288         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 289         break;
 290       }
 291       case JVM_CONSTANT_NameAndType: {
 292         cfs->guarantee_more(5, CHECK);  // name_index, signature_index, tag/access_flags
 293         const u2 name_index = cfs->get_u2_fast();
 294         const u2 signature_index = cfs->get_u2_fast();
 295         cp->name_and_type_at_put(index, name_index, signature_index);
 296         break;
 297       }
 298       case JVM_CONSTANT_Utf8 : {
 299         cfs->guarantee_more(2, CHECK);  // utf8_length
 300         u2  utf8_length = cfs->get_u2_fast();
 301         const u1* utf8_buffer = cfs->current();
 302         assert(utf8_buffer != NULL, "null utf8 buffer");
 303         // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
 304         cfs->guarantee_more(utf8_length+1, CHECK);  // utf8 string, tag/access_flags
 305         cfs->skip_u1_fast(utf8_length);
 306 
 307         // Before storing the symbol, make sure it's legal
 308         if (_need_verify) {
 309           verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
 310         }
 311 
 312         if (has_cp_patch_at(index)) {
 313           Handle patch = clear_cp_patch_at(index);
 314           guarantee_property(java_lang_String::is_instance(patch()),
 315                              "Illegal utf8 patch at %d in class file %s",
 316                              index,
 317                              CHECK);
 318           const char* const str = java_lang_String::as_utf8_string(patch());
 319           // (could use java_lang_String::as_symbol instead, but might as well batch them)
 320           utf8_buffer = (const u1*) str;
 321           utf8_length = (u2) strlen(str);
 322         }
 323 
 324         unsigned int hash;
 325         Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
 326                                                         utf8_length,
 327                                                         hash);
 328         if (result == NULL) {
 329           names[names_count] = (const char*)utf8_buffer;
 330           lengths[names_count] = utf8_length;
 331           indices[names_count] = index;
 332           hashValues[names_count++] = hash;
 333           if (names_count == SymbolTable::symbol_alloc_batch_size) {
 334             SymbolTable::new_symbols(_loader_data,
 335                                      cp,
 336                                      names_count,
 337                                      names,
 338                                      lengths,
 339                                      indices,
 340                                      hashValues);
 341             names_count = 0;
 342           }
 343         } else {
 344           cp->symbol_at_put(index, result);
 345         }
 346         break;
 347       }
 348       case JVM_CONSTANT_Module:
 349       case JVM_CONSTANT_Package: {
 350         // Record that an error occurred in these two cases but keep parsing so
 351         // that ACC_Module can be checked for in the access_flags.  Need to
 352         // throw NoClassDefFoundError in that case.
 353         if (_major_version >= JAVA_9_VERSION) {
 354           cfs->guarantee_more(3, CHECK);
 355           cfs->get_u2_fast();
 356           set_class_bad_constant_seen(tag);
 357           break;
 358         }
 359       }
 360       default: {
 361         classfile_parse_error("Unknown constant tag %u in class file %s",
 362                               tag,
 363                               CHECK);
 364         break;
 365       }
 366     } // end of switch(tag)
 367   } // end of for
 368 
 369   // Allocate the remaining symbols
 370   if (names_count > 0) {
 371     SymbolTable::new_symbols(_loader_data,
 372                              cp,
 373                              names_count,
 374                              names,
 375                              lengths,
 376                              indices,
 377                              hashValues);
 378   }
 379 
 380   // Copy _current pointer of local copy back to stream.
 381   assert(stream->current() == old_current, "non-exclusive use of stream");
 382   stream->set_current(cfs1.current());
 383 
 384 }
 385 
 386 static inline bool valid_cp_range(int index, int length) {
 387   return (index > 0 && index < length);
 388 }
 389 
 390 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
 391   assert(cp != NULL, "invariant");
 392   if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
 393     return cp->symbol_at(index);
 394   }
 395   return NULL;
 396 }
 397 
 398 #ifdef ASSERT
 399 PRAGMA_DIAG_PUSH
 400 PRAGMA_FORMAT_NONLITERAL_IGNORED
 401 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
 402   ResourceMark rm(THREAD);
 403   fatal(msg, _class_name->as_C_string());
 404 }
 405 
 406 void ClassFileParser::report_assert_property_failure(const char* msg,
 407                                                      int index,
 408                                                      TRAPS) const {
 409   ResourceMark rm(THREAD);
 410   fatal(msg, index, _class_name->as_C_string());
 411 }
 412 PRAGMA_DIAG_POP
 413 #endif
 414 
 415 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
 416                                          ConstantPool* const cp,
 417                                          const int length,
 418                                          TRAPS) {
 419   assert(cp != NULL, "invariant");
 420   assert(stream != NULL, "invariant");
 421 
 422   // parsing constant pool entries
 423   parse_constant_pool_entries(stream, cp, length, CHECK);
 424   if (class_bad_constant_seen() != 0) {
 425     // a bad CP entry has been detected previously so stop parsing and just return.
 426     return;
 427   }
 428 
 429   int index = 1;  // declared outside of loops for portability
 430   int num_klasses = 0;
 431 
 432   // first verification pass - validate cross references
 433   // and fixup class and string constants
 434   for (index = 1; index < length; index++) {          // Index 0 is unused
 435     const jbyte tag = cp->tag_at(index).value();
 436     switch (tag) {
 437       case JVM_CONSTANT_Class: {
 438         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 439         break;
 440       }
 441       case JVM_CONSTANT_Fieldref:
 442         // fall through
 443       case JVM_CONSTANT_Methodref:
 444         // fall through
 445       case JVM_CONSTANT_InterfaceMethodref: {
 446         if (!_need_verify) break;
 447         const int klass_ref_index = cp->klass_ref_index_at(index);
 448         const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
 449         check_property(valid_klass_reference_at(klass_ref_index),
 450                        "Invalid constant pool index %u in class file %s",
 451                        klass_ref_index, CHECK);
 452         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 453           cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 454           "Invalid constant pool index %u in class file %s",
 455           name_and_type_ref_index, CHECK);
 456         break;
 457       }
 458       case JVM_CONSTANT_String: {
 459         ShouldNotReachHere();     // Only JVM_CONSTANT_StringIndex should be present
 460         break;
 461       }
 462       case JVM_CONSTANT_Integer:
 463         break;
 464       case JVM_CONSTANT_Float:
 465         break;
 466       case JVM_CONSTANT_Long:
 467       case JVM_CONSTANT_Double: {
 468         index++;
 469         check_property(
 470           (index < length && cp->tag_at(index).is_invalid()),
 471           "Improper constant pool long/double index %u in class file %s",
 472           index, CHECK);
 473         break;
 474       }
 475       case JVM_CONSTANT_NameAndType: {
 476         if (!_need_verify) break;
 477         const int name_ref_index = cp->name_ref_index_at(index);
 478         const int signature_ref_index = cp->signature_ref_index_at(index);
 479         check_property(valid_symbol_at(name_ref_index),
 480           "Invalid constant pool index %u in class file %s",
 481           name_ref_index, CHECK);
 482         check_property(valid_symbol_at(signature_ref_index),
 483           "Invalid constant pool index %u in class file %s",
 484           signature_ref_index, CHECK);
 485         break;
 486       }
 487       case JVM_CONSTANT_Utf8:
 488         break;
 489       case JVM_CONSTANT_UnresolvedClass:         // fall-through
 490       case JVM_CONSTANT_UnresolvedClassInError: {
 491         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 492         break;
 493       }
 494       case JVM_CONSTANT_ClassIndex: {
 495         const int class_index = cp->klass_index_at(index);
 496         check_property(valid_symbol_at(class_index),
 497           "Invalid constant pool index %u in class file %s",
 498           class_index, CHECK);
 499         cp->unresolved_klass_at_put(index, class_index, num_klasses++);
 500         break;
 501       }
 502       case JVM_CONSTANT_StringIndex: {
 503         const int string_index = cp->string_index_at(index);
 504         check_property(valid_symbol_at(string_index),
 505           "Invalid constant pool index %u in class file %s",
 506           string_index, CHECK);
 507         Symbol* const sym = cp->symbol_at(string_index);
 508         cp->unresolved_string_at_put(index, sym);
 509         break;
 510       }
 511       case JVM_CONSTANT_MethodHandle: {
 512         const int ref_index = cp->method_handle_index_at(index);
 513         check_property(valid_cp_range(ref_index, length),
 514           "Invalid constant pool index %u in class file %s",
 515           ref_index, CHECK);
 516         const constantTag tag = cp->tag_at(ref_index);
 517         const int ref_kind = cp->method_handle_ref_kind_at(index);
 518 
 519         switch (ref_kind) {
 520           case JVM_REF_getField:
 521           case JVM_REF_getStatic:
 522           case JVM_REF_putField:
 523           case JVM_REF_putStatic: {
 524             check_property(
 525               tag.is_field(),
 526               "Invalid constant pool index %u in class file %s (not a field)",
 527               ref_index, CHECK);
 528             break;
 529           }
 530           case JVM_REF_invokeVirtual:
 531           case JVM_REF_newInvokeSpecial: {
 532             check_property(
 533               tag.is_method(),
 534               "Invalid constant pool index %u in class file %s (not a method)",
 535               ref_index, CHECK);
 536             break;
 537           }
 538           case JVM_REF_invokeStatic:
 539           case JVM_REF_invokeSpecial: {
 540             check_property(
 541               tag.is_method() ||
 542               ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
 543               "Invalid constant pool index %u in class file %s (not a method)",
 544               ref_index, CHECK);
 545             break;
 546           }
 547           case JVM_REF_invokeInterface: {
 548             check_property(
 549               tag.is_interface_method(),
 550               "Invalid constant pool index %u in class file %s (not an interface method)",
 551               ref_index, CHECK);
 552             break;
 553           }
 554           default: {
 555             classfile_parse_error(
 556               "Bad method handle kind at constant pool index %u in class file %s",
 557               index, CHECK);
 558           }
 559         } // switch(refkind)
 560         // Keep the ref_index unchanged.  It will be indirected at link-time.
 561         break;
 562       } // case MethodHandle
 563       case JVM_CONSTANT_MethodType: {
 564         const int ref_index = cp->method_type_index_at(index);
 565         check_property(valid_symbol_at(ref_index),
 566           "Invalid constant pool index %u in class file %s",
 567           ref_index, CHECK);
 568         break;
 569       }
 570       case JVM_CONSTANT_Dynamic: {
 571         const int name_and_type_ref_index =
 572           cp->bootstrap_name_and_type_ref_index_at(index);
 573 
 574         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 575           cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 576           "Invalid constant pool index %u in class file %s",
 577           name_and_type_ref_index, CHECK);
 578         // bootstrap specifier index must be checked later,
 579         // when BootstrapMethods attr is available
 580 
 581         // Mark the constant pool as having a CONSTANT_Dynamic_info structure
 582         cp->set_has_dynamic_constant();
 583         break;
 584       }
 585       case JVM_CONSTANT_InvokeDynamic: {
 586         const int name_and_type_ref_index =
 587           cp->bootstrap_name_and_type_ref_index_at(index);
 588 
 589         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 590           cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 591           "Invalid constant pool index %u in class file %s",
 592           name_and_type_ref_index, CHECK);
 593         // bootstrap specifier index must be checked later,
 594         // when BootstrapMethods attr is available
 595         break;
 596       }
 597       default: {
 598         fatal("bad constant pool tag value %u", cp->tag_at(index).value());
 599         ShouldNotReachHere();
 600         break;
 601       }
 602     } // switch(tag)
 603   } // end of for
 604 
 605   _first_patched_klass_resolved_index = num_klasses;
 606   cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
 607 
 608   if (_cp_patches != NULL) {
 609     // need to treat this_class specially...
 610 
 611     // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
 612     // for now. These will be replaced with actual names of the patched classes in patch_class().
 613     Symbol* s = vmSymbols::star_name();
 614     for (int n=_orig_cp_size; n<cp->length(); n++) {
 615       cp->symbol_at_put(n, s);
 616     }
 617 
 618     int this_class_index;
 619     {
 620       stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
 621       const u1* const mark = stream->current();
 622       stream->skip_u2_fast(1); // skip flags
 623       this_class_index = stream->get_u2_fast();
 624       stream->set_current(mark);  // revert to mark
 625     }
 626 
 627     for (index = 1; index < length; index++) {          // Index 0 is unused
 628       if (has_cp_patch_at(index)) {
 629         guarantee_property(index != this_class_index,
 630           "Illegal constant pool patch to self at %d in class file %s",
 631           index, CHECK);
 632         patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
 633       }
 634     }
 635   }
 636 
 637   if (!_need_verify) {
 638     return;
 639   }
 640 
 641   // second verification pass - checks the strings are of the right format.
 642   // but not yet to the other entries
 643   for (index = 1; index < length; index++) {
 644     const jbyte tag = cp->tag_at(index).value();
 645     switch (tag) {
 646       case JVM_CONSTANT_UnresolvedClass: {
 647         const Symbol* const class_name = cp->klass_name_at(index);
 648         // check the name, even if _cp_patches will overwrite it
 649         verify_legal_class_name(class_name, CHECK);
 650         break;
 651       }
 652       case JVM_CONSTANT_NameAndType: {
 653         if (_need_verify) {
 654           const int sig_index = cp->signature_ref_index_at(index);
 655           const int name_index = cp->name_ref_index_at(index);
 656           const Symbol* const name = cp->symbol_at(name_index);
 657           const Symbol* const sig = cp->symbol_at(sig_index);
 658           guarantee_property(sig->utf8_length() != 0,
 659             "Illegal zero length constant pool entry at %d in class %s",
 660             sig_index, CHECK);
 661           guarantee_property(name->utf8_length() != 0,
 662             "Illegal zero length constant pool entry at %d in class %s",
 663             name_index, CHECK);
 664 
 665           if (sig->char_at(0) == JVM_SIGNATURE_FUNC) {
 666             // Format check method name and signature
 667             verify_legal_method_name(name, CHECK);
 668             verify_legal_method_signature(name, sig, CHECK);
 669           } else {
 670             // Format check field name and signature
 671             verify_legal_field_name(name, CHECK);
 672             verify_legal_field_signature(name, sig, CHECK);
 673           }
 674         }
 675         break;
 676       }
 677       case JVM_CONSTANT_Dynamic: {
 678         const int name_and_type_ref_index =
 679           cp->name_and_type_ref_index_at(index);
 680         // already verified to be utf8
 681         const int name_ref_index =
 682           cp->name_ref_index_at(name_and_type_ref_index);
 683         // already verified to be utf8
 684         const int signature_ref_index =
 685           cp->signature_ref_index_at(name_and_type_ref_index);
 686         const Symbol* const name = cp->symbol_at(name_ref_index);
 687         const Symbol* const signature = cp->symbol_at(signature_ref_index);
 688         if (_need_verify) {
 689           // CONSTANT_Dynamic's name and signature are verified above, when iterating NameAndType_info.
 690           // Need only to be sure signature is non-zero length and the right type.
 691           if (signature->utf8_length() == 0 ||
 692               signature->char_at(0) == JVM_SIGNATURE_FUNC) {
 693             throwIllegalSignature("CONSTANT_Dynamic", name, signature, CHECK);
 694           }
 695         }
 696         break;
 697       }
 698       case JVM_CONSTANT_InvokeDynamic:
 699       case JVM_CONSTANT_Fieldref:
 700       case JVM_CONSTANT_Methodref:
 701       case JVM_CONSTANT_InterfaceMethodref: {
 702         const int name_and_type_ref_index =
 703           cp->name_and_type_ref_index_at(index);
 704         // already verified to be utf8
 705         const int name_ref_index =
 706           cp->name_ref_index_at(name_and_type_ref_index);
 707         // already verified to be utf8
 708         const int signature_ref_index =
 709           cp->signature_ref_index_at(name_and_type_ref_index);
 710         const Symbol* const name = cp->symbol_at(name_ref_index);
 711         const Symbol* const signature = cp->symbol_at(signature_ref_index);
 712         if (tag == JVM_CONSTANT_Fieldref) {
 713           if (_need_verify) {
 714             // Field name and signature are verified above, when iterating NameAndType_info.
 715             // Need only to be sure signature is non-zero length and the right type.
 716             if (signature->utf8_length() == 0 ||
 717                 signature->char_at(0) == JVM_SIGNATURE_FUNC) {
 718               throwIllegalSignature("Field", name, signature, CHECK);
 719             }
 720           }
 721         } else {
 722           if (_need_verify) {
 723             // Method name and signature are verified above, when iterating NameAndType_info.
 724             // Need only to be sure signature is non-zero length and the right type.
 725             if (signature->utf8_length() == 0 ||
 726                 signature->char_at(0) != JVM_SIGNATURE_FUNC) {
 727               throwIllegalSignature("Method", name, signature, CHECK);
 728             }
 729           }
 730           // 4509014: If a class method name begins with '<', it must be "<init>"
 731           const unsigned int name_len = name->utf8_length();
 732           if (tag == JVM_CONSTANT_Methodref &&
 733               name_len != 0 &&
 734               name->char_at(0) == '<' &&
 735               name != vmSymbols::object_initializer_name()) {
 736             classfile_parse_error(
 737               "Bad method name at constant pool index %u in class file %s",
 738               name_ref_index, CHECK);
 739           }
 740         }
 741         break;
 742       }
 743       case JVM_CONSTANT_MethodHandle: {
 744         const int ref_index = cp->method_handle_index_at(index);
 745         const int ref_kind = cp->method_handle_ref_kind_at(index);
 746         switch (ref_kind) {
 747           case JVM_REF_invokeVirtual:
 748           case JVM_REF_invokeStatic:
 749           case JVM_REF_invokeSpecial:
 750           case JVM_REF_newInvokeSpecial: {
 751             const int name_and_type_ref_index =
 752               cp->name_and_type_ref_index_at(ref_index);
 753             const int name_ref_index =
 754               cp->name_ref_index_at(name_and_type_ref_index);
 755             const Symbol* const name = cp->symbol_at(name_ref_index);
 756             if (ref_kind == JVM_REF_newInvokeSpecial) {
 757               if (name != vmSymbols::object_initializer_name()) {
 758                 classfile_parse_error(
 759                   "Bad constructor name at constant pool index %u in class file %s",
 760                     name_ref_index, CHECK);
 761               }
 762             } else {
 763               if (name == vmSymbols::object_initializer_name()) {
 764                 classfile_parse_error(
 765                   "Bad method name at constant pool index %u in class file %s",
 766                   name_ref_index, CHECK);
 767               }
 768             }
 769             break;
 770           }
 771           // Other ref_kinds are already fully checked in previous pass.
 772         } // switch(ref_kind)
 773         break;
 774       }
 775       case JVM_CONSTANT_MethodType: {
 776         const Symbol* const no_name = vmSymbols::type_name(); // place holder
 777         const Symbol* const signature = cp->method_type_signature_at(index);
 778         verify_legal_method_signature(no_name, signature, CHECK);
 779         break;
 780       }
 781       case JVM_CONSTANT_Utf8: {
 782         assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
 783       }
 784     }  // switch(tag)
 785   }  // end of for
 786 }
 787 
 788 Handle ClassFileParser::clear_cp_patch_at(int index) {
 789   Handle patch = cp_patch_at(index);
 790   _cp_patches->at_put(index, Handle());
 791   assert(!has_cp_patch_at(index), "");
 792   return patch;
 793 }
 794 
 795 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
 796   int name_index = _orig_cp_size + _num_patched_klasses;
 797   int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
 798 
 799   cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
 800   _num_patched_klasses ++;
 801 }
 802 
 803 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
 804                                           int index,
 805                                           Handle patch,
 806                                           TRAPS) {
 807   assert(cp != NULL, "invariant");
 808 
 809   BasicType patch_type = T_VOID;
 810 
 811   switch (cp->tag_at(index).value()) {
 812 
 813     case JVM_CONSTANT_UnresolvedClass: {
 814       // Patching a class means pre-resolving it.
 815       // The name in the constant pool is ignored.
 816       if (java_lang_Class::is_instance(patch())) {
 817         guarantee_property(!java_lang_Class::is_primitive(patch()),
 818                            "Illegal class patch at %d in class file %s",
 819                            index, CHECK);
 820         Klass* k = java_lang_Class::as_Klass(patch());
 821         patch_class(cp, index, k, k->name());
 822       } else {
 823         guarantee_property(java_lang_String::is_instance(patch()),
 824                            "Illegal class patch at %d in class file %s",
 825                            index, CHECK);
 826         Symbol* const name = java_lang_String::as_symbol(patch());
 827         patch_class(cp, index, NULL, name);
 828       }
 829       break;
 830     }
 831 
 832     case JVM_CONSTANT_String: {
 833       // skip this patch and don't clear it.  Needs the oop array for resolved
 834       // references to be created first.
 835       return;
 836     }
 837     case JVM_CONSTANT_Integer: patch_type = T_INT;    goto patch_prim;
 838     case JVM_CONSTANT_Float:   patch_type = T_FLOAT;  goto patch_prim;
 839     case JVM_CONSTANT_Long:    patch_type = T_LONG;   goto patch_prim;
 840     case JVM_CONSTANT_Double:  patch_type = T_DOUBLE; goto patch_prim;
 841     patch_prim:
 842     {
 843       jvalue value;
 844       BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
 845       guarantee_property(value_type == patch_type,
 846                          "Illegal primitive patch at %d in class file %s",
 847                          index, CHECK);
 848       switch (value_type) {
 849         case T_INT:    cp->int_at_put(index,   value.i); break;
 850         case T_FLOAT:  cp->float_at_put(index, value.f); break;
 851         case T_LONG:   cp->long_at_put(index,  value.j); break;
 852         case T_DOUBLE: cp->double_at_put(index, value.d); break;
 853         default:       assert(false, "");
 854       }
 855     } // end patch_prim label
 856     break;
 857 
 858     default: {
 859       // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
 860       guarantee_property(!has_cp_patch_at(index),
 861                          "Illegal unexpected patch at %d in class file %s",
 862                          index, CHECK);
 863       return;
 864     }
 865   } // end of switch(tag)
 866 
 867   // On fall-through, mark the patch as used.
 868   clear_cp_patch_at(index);
 869 }
 870 class NameSigHash: public ResourceObj {
 871  public:
 872   const Symbol*       _name;       // name
 873   const Symbol*       _sig;        // signature
 874   NameSigHash*  _next;             // Next entry in hash table
 875 };
 876 
 877 static const int HASH_ROW_SIZE = 256;
 878 
 879 static unsigned int hash(const Symbol* name, const Symbol* sig) {
 880   unsigned int raw_hash = 0;
 881   raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
 882   raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
 883 
 884   return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
 885 }
 886 
 887 
 888 static void initialize_hashtable(NameSigHash** table) {
 889   memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
 890 }
 891 // Return false if the name/sig combination is found in table.
 892 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
 893 // The old format checker uses heap sort to find duplicates.
 894 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
 895 // of table since we don't expect Symbol*'s to move.
 896 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
 897   assert(name != NULL, "name in constant pool is NULL");
 898 
 899   // First lookup for duplicates
 900   int index = hash(name, sig);
 901   NameSigHash* entry = table[index];
 902   while (entry != NULL) {
 903     if (entry->_name == name && entry->_sig == sig) {
 904       return false;
 905     }
 906     entry = entry->_next;
 907   }
 908 
 909   // No duplicate is found, allocate a new entry and fill it.
 910   entry = new NameSigHash();
 911   entry->_name = name;
 912   entry->_sig = sig;
 913 
 914   // Insert into hash table
 915   entry->_next = table[index];
 916   table[index] = entry;
 917 
 918   return true;
 919 }
 920 
 921 // Side-effects: populates the _local_interfaces field
 922 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
 923                                        const int itfs_len,
 924                                        ConstantPool* const cp,
 925                                        bool* const has_nonstatic_concrete_methods,
 926                                        TRAPS) {
 927   assert(stream != NULL, "invariant");
 928   assert(cp != NULL, "invariant");
 929   assert(has_nonstatic_concrete_methods != NULL, "invariant");
 930 
 931   if (itfs_len == 0) {
 932     _local_interfaces = Universe::the_empty_instance_klass_array();
 933   } else {
 934     assert(itfs_len > 0, "only called for len>0");
 935     _local_interfaces = MetadataFactory::new_array<InstanceKlass*>(_loader_data, itfs_len, NULL, CHECK);
 936 
 937     int index;
 938     for (index = 0; index < itfs_len; index++) {
 939       const u2 interface_index = stream->get_u2(CHECK);
 940       Klass* interf;
 941       check_property(
 942         valid_klass_reference_at(interface_index),
 943         "Interface name has bad constant pool index %u in class file %s",
 944         interface_index, CHECK);
 945       if (cp->tag_at(interface_index).is_klass()) {
 946         interf = cp->resolved_klass_at(interface_index);
 947       } else {
 948         Symbol* const unresolved_klass  = cp->klass_name_at(interface_index);
 949 
 950         // Don't need to check legal name because it's checked when parsing constant pool.
 951         // But need to make sure it's not an array type.
 952         guarantee_property(unresolved_klass->char_at(0) != JVM_SIGNATURE_ARRAY,
 953                            "Bad interface name in class file %s", CHECK);
 954 
 955         // Call resolve_super so classcircularity is checked
 956         interf = SystemDictionary::resolve_super_or_fail(
 957                                                   _class_name,
 958                                                   unresolved_klass,
 959                                                   Handle(THREAD, _loader_data->class_loader()),
 960                                                   _protection_domain,
 961                                                   false,
 962                                                   CHECK);
 963       }
 964 
 965       if (!interf->is_interface()) {
 966         THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
 967                   err_msg("class %s can not implement %s, because it is not an interface (%s)",
 968                           _class_name->as_klass_external_name(),
 969                           interf->external_name(),
 970                           interf->class_in_module_of_loader()));
 971       }
 972 
 973       if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
 974         *has_nonstatic_concrete_methods = true;
 975       }
 976       _local_interfaces->at_put(index, InstanceKlass::cast(interf));
 977     }
 978 
 979     if (!_need_verify || itfs_len <= 1) {
 980       return;
 981     }
 982 
 983     // Check if there's any duplicates in interfaces
 984     ResourceMark rm(THREAD);
 985     NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
 986                                                                  NameSigHash*,
 987                                                                  HASH_ROW_SIZE);
 988     initialize_hashtable(interface_names);
 989     bool dup = false;
 990     const Symbol* name = NULL;
 991     {
 992       debug_only(NoSafepointVerifier nsv;)
 993       for (index = 0; index < itfs_len; index++) {
 994         const InstanceKlass* const k = _local_interfaces->at(index);
 995         name = k->name();
 996         // If no duplicates, add (name, NULL) in hashtable interface_names.
 997         if (!put_after_lookup(name, NULL, interface_names)) {
 998           dup = true;
 999           break;
1000         }
1001       }
1002     }
1003     if (dup) {
1004       classfile_parse_error("Duplicate interface name \"%s\" in class file %s",
1005                              name->as_C_string(), CHECK);
1006     }
1007   }
1008 }
1009 
1010 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
1011                                            int constantvalue_index,
1012                                            int signature_index,
1013                                            TRAPS) const {
1014   // Make sure the constant pool entry is of a type appropriate to this field
1015   guarantee_property(
1016     (constantvalue_index > 0 &&
1017       constantvalue_index < cp->length()),
1018     "Bad initial value index %u in ConstantValue attribute in class file %s",
1019     constantvalue_index, CHECK);
1020 
1021   const constantTag value_type = cp->tag_at(constantvalue_index);
1022   switch(cp->basic_type_for_signature_at(signature_index)) {
1023     case T_LONG: {
1024       guarantee_property(value_type.is_long(),
1025                          "Inconsistent constant value type in class file %s",
1026                          CHECK);
1027       break;
1028     }
1029     case T_FLOAT: {
1030       guarantee_property(value_type.is_float(),
1031                          "Inconsistent constant value type in class file %s",
1032                          CHECK);
1033       break;
1034     }
1035     case T_DOUBLE: {
1036       guarantee_property(value_type.is_double(),
1037                          "Inconsistent constant value type in class file %s",
1038                          CHECK);
1039       break;
1040     }
1041     case T_BYTE:
1042     case T_CHAR:
1043     case T_SHORT:
1044     case T_BOOLEAN:
1045     case T_INT: {
1046       guarantee_property(value_type.is_int(),
1047                          "Inconsistent constant value type in class file %s",
1048                          CHECK);
1049       break;
1050     }
1051     case T_OBJECT: {
1052       guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
1053                          && value_type.is_string()),
1054                          "Bad string initial value in class file %s",
1055                          CHECK);
1056       break;
1057     }
1058     default: {
1059       classfile_parse_error("Unable to set initial value %u in class file %s",
1060                              constantvalue_index,
1061                              CHECK);
1062     }
1063   }
1064 }
1065 
1066 class AnnotationCollector : public ResourceObj{
1067 public:
1068   enum Location { _in_field, _in_method, _in_class };
1069   enum ID {
1070     _unknown = 0,
1071     _method_CallerSensitive,
1072     _method_ForceInline,
1073     _method_DontInline,
1074     _method_InjectedProfile,
1075     _method_LambdaForm_Compiled,
1076     _method_Hidden,
1077     _method_HotSpotIntrinsicCandidate,
1078     _jdk_internal_vm_annotation_Contended,
1079     _field_Stable,
1080     _jdk_internal_vm_annotation_ReservedStackAccess,
1081     _annotation_LIMIT
1082   };
1083   const Location _location;
1084   int _annotations_present;
1085   u2 _contended_group;
1086 
1087   AnnotationCollector(Location location)
1088     : _location(location), _annotations_present(0)
1089   {
1090     assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
1091   }
1092   // If this annotation name has an ID, report it (or _none).
1093   ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
1094   // Set the annotation name:
1095   void set_annotation(ID id) {
1096     assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1097     _annotations_present |= nth_bit((int)id);
1098   }
1099 
1100   void remove_annotation(ID id) {
1101     assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
1102     _annotations_present &= ~nth_bit((int)id);
1103   }
1104 
1105   // Report if the annotation is present.
1106   bool has_any_annotations() const { return _annotations_present != 0; }
1107   bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
1108 
1109   void set_contended_group(u2 group) { _contended_group = group; }
1110   u2 contended_group() const { return _contended_group; }
1111 
1112   bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
1113 
1114   void set_stable(bool stable) { set_annotation(_field_Stable); }
1115   bool is_stable() const { return has_annotation(_field_Stable); }
1116 };
1117 
1118 // This class also doubles as a holder for metadata cleanup.
1119 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
1120 private:
1121   ClassLoaderData* _loader_data;
1122   AnnotationArray* _field_annotations;
1123   AnnotationArray* _field_type_annotations;
1124 public:
1125   FieldAnnotationCollector(ClassLoaderData* loader_data) :
1126     AnnotationCollector(_in_field),
1127     _loader_data(loader_data),
1128     _field_annotations(NULL),
1129     _field_type_annotations(NULL) {}
1130   ~FieldAnnotationCollector();
1131   void apply_to(FieldInfo* f);
1132   AnnotationArray* field_annotations()      { return _field_annotations; }
1133   AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1134 
1135   void set_field_annotations(AnnotationArray* a)      { _field_annotations = a; }
1136   void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1137 };
1138 
1139 class MethodAnnotationCollector : public AnnotationCollector{
1140 public:
1141   MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1142   void apply_to(const methodHandle& m);
1143 };
1144 
1145 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1146 public:
1147   ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1148   void apply_to(InstanceKlass* ik);
1149 };
1150 
1151 
1152 static int skip_annotation_value(const u1*, int, int); // fwd decl
1153 
1154 // Safely increment index by val if does not pass limit
1155 #define SAFE_ADD(index, limit, val) \
1156 if (index >= limit - val) return limit; \
1157 index += val;
1158 
1159 // Skip an annotation.  Return >=limit if there is any problem.
1160 static int skip_annotation(const u1* buffer, int limit, int index) {
1161   assert(buffer != NULL, "invariant");
1162   // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1163   // value := switch (tag:u1) { ... }
1164   SAFE_ADD(index, limit, 4); // skip atype and read nmem
1165   int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1166   while (--nmem >= 0 && index < limit) {
1167     SAFE_ADD(index, limit, 2); // skip member
1168     index = skip_annotation_value(buffer, limit, index);
1169   }
1170   return index;
1171 }
1172 
1173 // Skip an annotation value.  Return >=limit if there is any problem.
1174 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1175   assert(buffer != NULL, "invariant");
1176 
1177   // value := switch (tag:u1) {
1178   //   case B, C, I, S, Z, D, F, J, c: con:u2;
1179   //   case e: e_class:u2 e_name:u2;
1180   //   case s: s_con:u2;
1181   //   case [: do(nval:u2) {value};
1182   //   case @: annotation;
1183   //   case s: s_con:u2;
1184   // }
1185   SAFE_ADD(index, limit, 1); // read tag
1186   const u1 tag = buffer[index - 1];
1187   switch (tag) {
1188     case 'B':
1189     case 'C':
1190     case 'I':
1191     case 'S':
1192     case 'Z':
1193     case 'D':
1194     case 'F':
1195     case 'J':
1196     case 'c':
1197     case 's':
1198       SAFE_ADD(index, limit, 2);  // skip con or s_con
1199       break;
1200     case 'e':
1201       SAFE_ADD(index, limit, 4);  // skip e_class, e_name
1202       break;
1203     case '[':
1204     {
1205       SAFE_ADD(index, limit, 2); // read nval
1206       int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1207       while (--nval >= 0 && index < limit) {
1208         index = skip_annotation_value(buffer, limit, index);
1209       }
1210     }
1211     break;
1212     case '@':
1213       index = skip_annotation(buffer, limit, index);
1214       break;
1215     default:
1216       return limit;  //  bad tag byte
1217   }
1218   return index;
1219 }
1220 
1221 // Sift through annotations, looking for those significant to the VM:
1222 static void parse_annotations(const ConstantPool* const cp,
1223                               const u1* buffer, int limit,
1224                               AnnotationCollector* coll,
1225                               ClassLoaderData* loader_data,
1226                               TRAPS) {
1227 
1228   assert(cp != NULL, "invariant");
1229   assert(buffer != NULL, "invariant");
1230   assert(coll != NULL, "invariant");
1231   assert(loader_data != NULL, "invariant");
1232 
1233   // annotations := do(nann:u2) {annotation}
1234   int index = 2; // read nann
1235   if (index >= limit)  return;
1236   int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1237   enum {  // initial annotation layout
1238     atype_off = 0,      // utf8 such as 'Ljava/lang/annotation/Retention;'
1239     count_off = 2,      // u2   such as 1 (one value)
1240     member_off = 4,     // utf8 such as 'value'
1241     tag_off = 6,        // u1   such as 'c' (type) or 'e' (enum)
1242     e_tag_val = 'e',
1243     e_type_off = 7,   // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1244     e_con_off = 9,    // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1245     e_size = 11,     // end of 'e' annotation
1246     c_tag_val = 'c',    // payload is type
1247     c_con_off = 7,    // utf8 payload, such as 'I'
1248     c_size = 9,       // end of 'c' annotation
1249     s_tag_val = 's',    // payload is String
1250     s_con_off = 7,    // utf8 payload, such as 'Ljava/lang/String;'
1251     s_size = 9,
1252     min_size = 6        // smallest possible size (zero members)
1253   };
1254   // Cannot add min_size to index in case of overflow MAX_INT
1255   while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1256     int index0 = index;
1257     index = skip_annotation(buffer, limit, index);
1258     const u1* const abase = buffer + index0;
1259     const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1260     const int count = Bytes::get_Java_u2((address)abase + count_off);
1261     const Symbol* const aname = check_symbol_at(cp, atype);
1262     if (aname == NULL)  break;  // invalid annotation name
1263     const Symbol* member = NULL;
1264     if (count >= 1) {
1265       const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1266       member = check_symbol_at(cp, member_index);
1267       if (member == NULL)  break;  // invalid member name
1268     }
1269 
1270     // Here is where parsing particular annotations will take place.
1271     AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1272     if (AnnotationCollector::_unknown == id)  continue;
1273     coll->set_annotation(id);
1274 
1275     if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1276       // @Contended can optionally specify the contention group.
1277       //
1278       // Contended group defines the equivalence class over the fields:
1279       // the fields within the same contended group are not treated distinct.
1280       // The only exception is default group, which does not incur the
1281       // equivalence. Naturally, contention group for classes is meaningless.
1282       //
1283       // While the contention group is specified as String, annotation
1284       // values are already interned, and we might as well use the constant
1285       // pool index as the group tag.
1286       //
1287       u2 group_index = 0; // default contended group
1288       if (count == 1
1289         && s_size == (index - index0)  // match size
1290         && s_tag_val == *(abase + tag_off)
1291         && member == vmSymbols::value_name()) {
1292         group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1293         if (cp->symbol_at(group_index)->utf8_length() == 0) {
1294           group_index = 0; // default contended group
1295         }
1296       }
1297       coll->set_contended_group(group_index);
1298     }
1299   }
1300 }
1301 
1302 
1303 // Parse attributes for a field.
1304 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1305                                              u2 attributes_count,
1306                                              bool is_static, u2 signature_index,
1307                                              u2* const constantvalue_index_addr,
1308                                              bool* const is_synthetic_addr,
1309                                              u2* const generic_signature_index_addr,
1310                                              ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1311                                              TRAPS) {
1312   assert(cfs != NULL, "invariant");
1313   assert(constantvalue_index_addr != NULL, "invariant");
1314   assert(is_synthetic_addr != NULL, "invariant");
1315   assert(generic_signature_index_addr != NULL, "invariant");
1316   assert(parsed_annotations != NULL, "invariant");
1317   assert(attributes_count > 0, "attributes_count should be greater than 0");
1318 
1319   u2 constantvalue_index = 0;
1320   u2 generic_signature_index = 0;
1321   bool is_synthetic = false;
1322   const u1* runtime_visible_annotations = NULL;
1323   int runtime_visible_annotations_length = 0;
1324   const u1* runtime_invisible_annotations = NULL;
1325   int runtime_invisible_annotations_length = 0;
1326   const u1* runtime_visible_type_annotations = NULL;
1327   int runtime_visible_type_annotations_length = 0;
1328   const u1* runtime_invisible_type_annotations = NULL;
1329   int runtime_invisible_type_annotations_length = 0;
1330   bool runtime_invisible_annotations_exists = false;
1331   bool runtime_invisible_type_annotations_exists = false;
1332   const ConstantPool* const cp = _cp;
1333 
1334   while (attributes_count--) {
1335     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
1336     const u2 attribute_name_index = cfs->get_u2_fast();
1337     const u4 attribute_length = cfs->get_u4_fast();
1338     check_property(valid_symbol_at(attribute_name_index),
1339                    "Invalid field attribute index %u in class file %s",
1340                    attribute_name_index,
1341                    CHECK);
1342 
1343     const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1344     if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1345       // ignore if non-static
1346       if (constantvalue_index != 0) {
1347         classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1348       }
1349       check_property(
1350         attribute_length == 2,
1351         "Invalid ConstantValue field attribute length %u in class file %s",
1352         attribute_length, CHECK);
1353 
1354       constantvalue_index = cfs->get_u2(CHECK);
1355       if (_need_verify) {
1356         verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1357       }
1358     } else if (attribute_name == vmSymbols::tag_synthetic()) {
1359       if (attribute_length != 0) {
1360         classfile_parse_error(
1361           "Invalid Synthetic field attribute length %u in class file %s",
1362           attribute_length, CHECK);
1363       }
1364       is_synthetic = true;
1365     } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1366       if (attribute_length != 0) {
1367         classfile_parse_error(
1368           "Invalid Deprecated field attribute length %u in class file %s",
1369           attribute_length, CHECK);
1370       }
1371     } else if (_major_version >= JAVA_1_5_VERSION) {
1372       if (attribute_name == vmSymbols::tag_signature()) {
1373         if (generic_signature_index != 0) {
1374           classfile_parse_error(
1375             "Multiple Signature attributes for field in class file %s", CHECK);
1376         }
1377         if (attribute_length != 2) {
1378           classfile_parse_error(
1379             "Wrong size %u for field's Signature attribute in class file %s",
1380             attribute_length, CHECK);
1381         }
1382         generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1383       } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1384         if (runtime_visible_annotations != NULL) {
1385           classfile_parse_error(
1386             "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1387         }
1388         runtime_visible_annotations_length = attribute_length;
1389         runtime_visible_annotations = cfs->current();
1390         assert(runtime_visible_annotations != NULL, "null visible annotations");
1391         cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1392         parse_annotations(cp,
1393                           runtime_visible_annotations,
1394                           runtime_visible_annotations_length,
1395                           parsed_annotations,
1396                           _loader_data,
1397                           CHECK);
1398         cfs->skip_u1_fast(runtime_visible_annotations_length);
1399       } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1400         if (runtime_invisible_annotations_exists) {
1401           classfile_parse_error(
1402             "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1403         }
1404         runtime_invisible_annotations_exists = true;
1405         if (PreserveAllAnnotations) {
1406           runtime_invisible_annotations_length = attribute_length;
1407           runtime_invisible_annotations = cfs->current();
1408           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1409         }
1410         cfs->skip_u1(attribute_length, CHECK);
1411       } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1412         if (runtime_visible_type_annotations != NULL) {
1413           classfile_parse_error(
1414             "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1415         }
1416         runtime_visible_type_annotations_length = attribute_length;
1417         runtime_visible_type_annotations = cfs->current();
1418         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1419         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1420       } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1421         if (runtime_invisible_type_annotations_exists) {
1422           classfile_parse_error(
1423             "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1424         } else {
1425           runtime_invisible_type_annotations_exists = true;
1426         }
1427         if (PreserveAllAnnotations) {
1428           runtime_invisible_type_annotations_length = attribute_length;
1429           runtime_invisible_type_annotations = cfs->current();
1430           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1431         }
1432         cfs->skip_u1(attribute_length, CHECK);
1433       } else {
1434         cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1435       }
1436     } else {
1437       cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1438     }
1439   }
1440 
1441   *constantvalue_index_addr = constantvalue_index;
1442   *is_synthetic_addr = is_synthetic;
1443   *generic_signature_index_addr = generic_signature_index;
1444   AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1445                                             runtime_visible_annotations_length,
1446                                             runtime_invisible_annotations,
1447                                             runtime_invisible_annotations_length,
1448                                             CHECK);
1449   parsed_annotations->set_field_annotations(a);
1450   a = assemble_annotations(runtime_visible_type_annotations,
1451                            runtime_visible_type_annotations_length,
1452                            runtime_invisible_type_annotations,
1453                            runtime_invisible_type_annotations_length,
1454                            CHECK);
1455   parsed_annotations->set_field_type_annotations(a);
1456   return;
1457 }
1458 
1459 
1460 // Field allocation types. Used for computing field offsets.
1461 
1462 enum FieldAllocationType {
1463   STATIC_OOP,           // Oops
1464   STATIC_BYTE,          // Boolean, Byte, char
1465   STATIC_SHORT,         // shorts
1466   STATIC_WORD,          // ints
1467   STATIC_DOUBLE,        // aligned long or double
1468   NONSTATIC_OOP,
1469   NONSTATIC_BYTE,
1470   NONSTATIC_SHORT,
1471   NONSTATIC_WORD,
1472   NONSTATIC_DOUBLE,
1473   MAX_FIELD_ALLOCATION_TYPE,
1474   BAD_ALLOCATION_TYPE = -1
1475 };
1476 
1477 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1478   BAD_ALLOCATION_TYPE, // 0
1479   BAD_ALLOCATION_TYPE, // 1
1480   BAD_ALLOCATION_TYPE, // 2
1481   BAD_ALLOCATION_TYPE, // 3
1482   NONSTATIC_BYTE ,     // T_BOOLEAN     =  4,
1483   NONSTATIC_SHORT,     // T_CHAR        =  5,
1484   NONSTATIC_WORD,      // T_FLOAT       =  6,
1485   NONSTATIC_DOUBLE,    // T_DOUBLE      =  7,
1486   NONSTATIC_BYTE,      // T_BYTE        =  8,
1487   NONSTATIC_SHORT,     // T_SHORT       =  9,
1488   NONSTATIC_WORD,      // T_INT         = 10,
1489   NONSTATIC_DOUBLE,    // T_LONG        = 11,
1490   NONSTATIC_OOP,       // T_OBJECT      = 12,
1491   NONSTATIC_OOP,       // T_ARRAY       = 13,
1492   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1493   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1494   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1495   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1496   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1497   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1498   BAD_ALLOCATION_TYPE, // 0
1499   BAD_ALLOCATION_TYPE, // 1
1500   BAD_ALLOCATION_TYPE, // 2
1501   BAD_ALLOCATION_TYPE, // 3
1502   STATIC_BYTE ,        // T_BOOLEAN     =  4,
1503   STATIC_SHORT,        // T_CHAR        =  5,
1504   STATIC_WORD,         // T_FLOAT       =  6,
1505   STATIC_DOUBLE,       // T_DOUBLE      =  7,
1506   STATIC_BYTE,         // T_BYTE        =  8,
1507   STATIC_SHORT,        // T_SHORT       =  9,
1508   STATIC_WORD,         // T_INT         = 10,
1509   STATIC_DOUBLE,       // T_LONG        = 11,
1510   STATIC_OOP,          // T_OBJECT      = 12,
1511   STATIC_OOP,          // T_ARRAY       = 13,
1512   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1513   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1514   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1515   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1516   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1517   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1518 };
1519 
1520 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1521   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1522   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1523   assert(result != BAD_ALLOCATION_TYPE, "bad type");
1524   return result;
1525 }
1526 
1527 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1528  public:
1529   u2 count[MAX_FIELD_ALLOCATION_TYPE];
1530 
1531   FieldAllocationCount() {
1532     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1533       count[i] = 0;
1534     }
1535   }
1536 
1537   FieldAllocationType update(bool is_static, BasicType type) {
1538     FieldAllocationType atype = basic_type_to_atype(is_static, type);
1539     if (atype != BAD_ALLOCATION_TYPE) {
1540       // Make sure there is no overflow with injected fields.
1541       assert(count[atype] < 0xFFFF, "More than 65535 fields");
1542       count[atype]++;
1543     }
1544     return atype;
1545   }
1546 };
1547 
1548 // Side-effects: populates the _fields, _fields_annotations,
1549 // _fields_type_annotations fields
1550 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1551                                    bool is_interface,
1552                                    FieldAllocationCount* const fac,
1553                                    ConstantPool* cp,
1554                                    const int cp_size,
1555                                    u2* const java_fields_count_ptr,
1556                                    TRAPS) {
1557 
1558   assert(cfs != NULL, "invariant");
1559   assert(fac != NULL, "invariant");
1560   assert(cp != NULL, "invariant");
1561   assert(java_fields_count_ptr != NULL, "invariant");
1562 
1563   assert(NULL == _fields, "invariant");
1564   assert(NULL == _fields_annotations, "invariant");
1565   assert(NULL == _fields_type_annotations, "invariant");
1566 
1567   cfs->guarantee_more(2, CHECK);  // length
1568   const u2 length = cfs->get_u2_fast();
1569   *java_fields_count_ptr = length;
1570 
1571   int num_injected = 0;
1572   const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1573                                                                   &num_injected);
1574   const int total_fields = length + num_injected;
1575 
1576   // The field array starts with tuples of shorts
1577   // [access, name index, sig index, initial value index, byte offset].
1578   // A generic signature slot only exists for field with generic
1579   // signature attribute. And the access flag is set with
1580   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1581   // signature slots are at the end of the field array and after all
1582   // other fields data.
1583   //
1584   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1585   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1586   //       ...
1587   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1588   //       [generic signature index]
1589   //       [generic signature index]
1590   //       ...
1591   //
1592   // Allocate a temporary resource array for field data. For each field,
1593   // a slot is reserved in the temporary array for the generic signature
1594   // index. After parsing all fields, the data are copied to a permanent
1595   // array and any unused slots will be discarded.
1596   ResourceMark rm(THREAD);
1597   u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1598                                               u2,
1599                                               total_fields * (FieldInfo::field_slots + 1));
1600 
1601   // The generic signature slots start after all other fields' data.
1602   int generic_signature_slot = total_fields * FieldInfo::field_slots;
1603   int num_generic_signature = 0;
1604   for (int n = 0; n < length; n++) {
1605     // access_flags, name_index, descriptor_index, attributes_count
1606     cfs->guarantee_more(8, CHECK);
1607 
1608     AccessFlags access_flags;
1609     const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1610     verify_legal_field_modifiers(flags, is_interface, CHECK);
1611     access_flags.set_flags(flags);
1612 
1613     const u2 name_index = cfs->get_u2_fast();
1614     check_property(valid_symbol_at(name_index),
1615       "Invalid constant pool index %u for field name in class file %s",
1616       name_index, CHECK);
1617     const Symbol* const name = cp->symbol_at(name_index);
1618     verify_legal_field_name(name, CHECK);
1619 
1620     const u2 signature_index = cfs->get_u2_fast();
1621     check_property(valid_symbol_at(signature_index),
1622       "Invalid constant pool index %u for field signature in class file %s",
1623       signature_index, CHECK);
1624     const Symbol* const sig = cp->symbol_at(signature_index);
1625     verify_legal_field_signature(name, sig, CHECK);
1626 
1627     u2 constantvalue_index = 0;
1628     bool is_synthetic = false;
1629     u2 generic_signature_index = 0;
1630     const bool is_static = access_flags.is_static();
1631     FieldAnnotationCollector parsed_annotations(_loader_data);
1632 
1633     const u2 attributes_count = cfs->get_u2_fast();
1634     if (attributes_count > 0) {
1635       parse_field_attributes(cfs,
1636                              attributes_count,
1637                              is_static,
1638                              signature_index,
1639                              &constantvalue_index,
1640                              &is_synthetic,
1641                              &generic_signature_index,
1642                              &parsed_annotations,
1643                              CHECK);
1644 
1645       if (parsed_annotations.field_annotations() != NULL) {
1646         if (_fields_annotations == NULL) {
1647           _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1648                                              _loader_data, length, NULL,
1649                                              CHECK);
1650         }
1651         _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1652         parsed_annotations.set_field_annotations(NULL);
1653       }
1654       if (parsed_annotations.field_type_annotations() != NULL) {
1655         if (_fields_type_annotations == NULL) {
1656           _fields_type_annotations =
1657             MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1658                                                          length,
1659                                                          NULL,
1660                                                          CHECK);
1661         }
1662         _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1663         parsed_annotations.set_field_type_annotations(NULL);
1664       }
1665 
1666       if (is_synthetic) {
1667         access_flags.set_is_synthetic();
1668       }
1669       if (generic_signature_index != 0) {
1670         access_flags.set_field_has_generic_signature();
1671         fa[generic_signature_slot] = generic_signature_index;
1672         generic_signature_slot ++;
1673         num_generic_signature ++;
1674       }
1675     }
1676 
1677     FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1678     field->initialize(access_flags.as_short(),
1679                       name_index,
1680                       signature_index,
1681                       constantvalue_index);
1682     const BasicType type = cp->basic_type_for_signature_at(signature_index);
1683 
1684     // Remember how many oops we encountered and compute allocation type
1685     const FieldAllocationType atype = fac->update(is_static, type);
1686     field->set_allocation_type(atype);
1687 
1688     // After field is initialized with type, we can augment it with aux info
1689     if (parsed_annotations.has_any_annotations())
1690       parsed_annotations.apply_to(field);
1691   }
1692 
1693   int index = length;
1694   if (num_injected != 0) {
1695     for (int n = 0; n < num_injected; n++) {
1696       // Check for duplicates
1697       if (injected[n].may_be_java) {
1698         const Symbol* const name      = injected[n].name();
1699         const Symbol* const signature = injected[n].signature();
1700         bool duplicate = false;
1701         for (int i = 0; i < length; i++) {
1702           const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1703           if (name      == cp->symbol_at(f->name_index()) &&
1704               signature == cp->symbol_at(f->signature_index())) {
1705             // Symbol is desclared in Java so skip this one
1706             duplicate = true;
1707             break;
1708           }
1709         }
1710         if (duplicate) {
1711           // These will be removed from the field array at the end
1712           continue;
1713         }
1714       }
1715 
1716       // Injected field
1717       FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1718       field->initialize(JVM_ACC_FIELD_INTERNAL,
1719                         injected[n].name_index,
1720                         injected[n].signature_index,
1721                         0);
1722 
1723       const BasicType type = FieldType::basic_type(injected[n].signature());
1724 
1725       // Remember how many oops we encountered and compute allocation type
1726       const FieldAllocationType atype = fac->update(false, type);
1727       field->set_allocation_type(atype);
1728       index++;
1729     }
1730   }
1731 
1732   assert(NULL == _fields, "invariant");
1733 
1734   _fields =
1735     MetadataFactory::new_array<u2>(_loader_data,
1736                                    index * FieldInfo::field_slots + num_generic_signature,
1737                                    CHECK);
1738   // Sometimes injected fields already exist in the Java source so
1739   // the fields array could be too long.  In that case the
1740   // fields array is trimed. Also unused slots that were reserved
1741   // for generic signature indexes are discarded.
1742   {
1743     int i = 0;
1744     for (; i < index * FieldInfo::field_slots; i++) {
1745       _fields->at_put(i, fa[i]);
1746     }
1747     for (int j = total_fields * FieldInfo::field_slots;
1748          j < generic_signature_slot; j++) {
1749       _fields->at_put(i++, fa[j]);
1750     }
1751     assert(_fields->length() == i, "");
1752   }
1753 
1754   if (_need_verify && length > 1) {
1755     // Check duplicated fields
1756     ResourceMark rm(THREAD);
1757     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1758       THREAD, NameSigHash*, HASH_ROW_SIZE);
1759     initialize_hashtable(names_and_sigs);
1760     bool dup = false;
1761     const Symbol* name = NULL;
1762     const Symbol* sig = NULL;
1763     {
1764       debug_only(NoSafepointVerifier nsv;)
1765       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1766         name = fs.name();
1767         sig = fs.signature();
1768         // If no duplicates, add name/signature in hashtable names_and_sigs.
1769         if (!put_after_lookup(name, sig, names_and_sigs)) {
1770           dup = true;
1771           break;
1772         }
1773       }
1774     }
1775     if (dup) {
1776       classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1777                              name->as_C_string(), sig->as_klass_external_name(), CHECK);
1778     }
1779   }
1780 }
1781 
1782 
1783 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1784                                                                          u4 code_length,
1785                                                                          u4 exception_table_length,
1786                                                                          TRAPS) {
1787   assert(cfs != NULL, "invariant");
1788 
1789   const unsafe_u2* const exception_table_start = cfs->current();
1790   assert(exception_table_start != NULL, "null exception table");
1791 
1792   cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1793                                                                // end_pc,
1794                                                                // handler_pc,
1795                                                                // catch_type_index
1796 
1797   // Will check legal target after parsing code array in verifier.
1798   if (_need_verify) {
1799     for (unsigned int i = 0; i < exception_table_length; i++) {
1800       const u2 start_pc = cfs->get_u2_fast();
1801       const u2 end_pc = cfs->get_u2_fast();
1802       const u2 handler_pc = cfs->get_u2_fast();
1803       const u2 catch_type_index = cfs->get_u2_fast();
1804       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1805                          "Illegal exception table range in class file %s",
1806                          CHECK_NULL);
1807       guarantee_property(handler_pc < code_length,
1808                          "Illegal exception table handler in class file %s",
1809                          CHECK_NULL);
1810       if (catch_type_index != 0) {
1811         guarantee_property(valid_klass_reference_at(catch_type_index),
1812                            "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1813       }
1814     }
1815   } else {
1816     cfs->skip_u2_fast(exception_table_length * 4);
1817   }
1818   return exception_table_start;
1819 }
1820 
1821 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1822                                              u4 code_length,
1823                                              CompressedLineNumberWriteStream**const write_stream,
1824                                              TRAPS) {
1825 
1826   const ClassFileStream* const cfs = _stream;
1827   unsigned int num_entries = cfs->get_u2(CHECK);
1828 
1829   // Each entry is a u2 start_pc, and a u2 line_number
1830   const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1831 
1832   // Verify line number attribute and table length
1833   check_property(
1834     code_attribute_length == sizeof(u2) + length_in_bytes,
1835     "LineNumberTable attribute has wrong length in class file %s", CHECK);
1836 
1837   cfs->guarantee_more(length_in_bytes, CHECK);
1838 
1839   if ((*write_stream) == NULL) {
1840     if (length_in_bytes > fixed_buffer_size) {
1841       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1842     } else {
1843       (*write_stream) = new CompressedLineNumberWriteStream(
1844         _linenumbertable_buffer, fixed_buffer_size);
1845     }
1846   }
1847 
1848   while (num_entries-- > 0) {
1849     const u2 bci  = cfs->get_u2_fast(); // start_pc
1850     const u2 line = cfs->get_u2_fast(); // line_number
1851     guarantee_property(bci < code_length,
1852         "Invalid pc in LineNumberTable in class file %s", CHECK);
1853     (*write_stream)->write_pair(bci, line);
1854   }
1855 }
1856 
1857 
1858 class LVT_Hash : public AllStatic {
1859  public:
1860 
1861   static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1862   /*
1863    * 3-tuple start_bci/length/slot has to be unique key,
1864    * so the following comparison seems to be redundant:
1865    *       && elem->name_cp_index == entry->_elem->name_cp_index
1866    */
1867     return (e0.start_bci     == e1.start_bci &&
1868             e0.length        == e1.length &&
1869             e0.name_cp_index == e1.name_cp_index &&
1870             e0.slot          == e1.slot);
1871   }
1872 
1873   static unsigned int hash(LocalVariableTableElement const& e0) {
1874     unsigned int raw_hash = e0.start_bci;
1875 
1876     raw_hash = e0.length        + raw_hash * 37;
1877     raw_hash = e0.name_cp_index + raw_hash * 37;
1878     raw_hash = e0.slot          + raw_hash * 37;
1879 
1880     return raw_hash;
1881   }
1882 };
1883 
1884 
1885 // Class file LocalVariableTable elements.
1886 class Classfile_LVT_Element {
1887  public:
1888   u2 start_bci;
1889   u2 length;
1890   u2 name_cp_index;
1891   u2 descriptor_cp_index;
1892   u2 slot;
1893 };
1894 
1895 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1896                              LocalVariableTableElement* const lvt) {
1897   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
1898   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
1899   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1900   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1901   lvt->signature_cp_index  = 0;
1902   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
1903 }
1904 
1905 // Function is used to parse both attributes:
1906 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1907 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1908                                                                              u4 code_length,
1909                                                                              u2 max_locals,
1910                                                                              u4 code_attribute_length,
1911                                                                              u2* const localvariable_table_length,
1912                                                                              bool isLVTT,
1913                                                                              TRAPS) {
1914   const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1915   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1916   const unsigned int size =
1917     (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1918 
1919   const ConstantPool* const cp = _cp;
1920 
1921   // Verify local variable table attribute has right length
1922   if (_need_verify) {
1923     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1924                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1925   }
1926 
1927   const unsafe_u2* const localvariable_table_start = cfs->current();
1928   assert(localvariable_table_start != NULL, "null local variable table");
1929   if (!_need_verify) {
1930     cfs->skip_u2_fast(size);
1931   } else {
1932     cfs->guarantee_more(size * 2, CHECK_NULL);
1933     for(int i = 0; i < (*localvariable_table_length); i++) {
1934       const u2 start_pc = cfs->get_u2_fast();
1935       const u2 length = cfs->get_u2_fast();
1936       const u2 name_index = cfs->get_u2_fast();
1937       const u2 descriptor_index = cfs->get_u2_fast();
1938       const u2 index = cfs->get_u2_fast();
1939       // Assign to a u4 to avoid overflow
1940       const u4 end_pc = (u4)start_pc + (u4)length;
1941 
1942       if (start_pc >= code_length) {
1943         classfile_parse_error(
1944           "Invalid start_pc %u in %s in class file %s",
1945           start_pc, tbl_name, CHECK_NULL);
1946       }
1947       if (end_pc > code_length) {
1948         classfile_parse_error(
1949           "Invalid length %u in %s in class file %s",
1950           length, tbl_name, CHECK_NULL);
1951       }
1952       const int cp_size = cp->length();
1953       guarantee_property(valid_symbol_at(name_index),
1954         "Name index %u in %s has bad constant type in class file %s",
1955         name_index, tbl_name, CHECK_NULL);
1956       guarantee_property(valid_symbol_at(descriptor_index),
1957         "Signature index %u in %s has bad constant type in class file %s",
1958         descriptor_index, tbl_name, CHECK_NULL);
1959 
1960       const Symbol* const name = cp->symbol_at(name_index);
1961       const Symbol* const sig = cp->symbol_at(descriptor_index);
1962       verify_legal_field_name(name, CHECK_NULL);
1963       u2 extra_slot = 0;
1964       if (!isLVTT) {
1965         verify_legal_field_signature(name, sig, CHECK_NULL);
1966 
1967         // 4894874: check special cases for double and long local variables
1968         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1969             sig == vmSymbols::type_signature(T_LONG)) {
1970           extra_slot = 1;
1971         }
1972       }
1973       guarantee_property((index + extra_slot) < max_locals,
1974                           "Invalid index %u in %s in class file %s",
1975                           index, tbl_name, CHECK_NULL);
1976     }
1977   }
1978   return localvariable_table_start;
1979 }
1980 
1981 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1982                                       u4 code_attribute_length,
1983                                       bool need_verify,
1984                                       TRAPS) {
1985   assert(cfs != NULL, "invariant");
1986 
1987   if (0 == code_attribute_length) {
1988     return NULL;
1989   }
1990 
1991   const u1* const stackmap_table_start = cfs->current();
1992   assert(stackmap_table_start != NULL, "null stackmap table");
1993 
1994   // check code_attribute_length first
1995   cfs->skip_u1(code_attribute_length, CHECK_NULL);
1996 
1997   if (!need_verify && !DumpSharedSpaces) {
1998     return NULL;
1999   }
2000   return stackmap_table_start;
2001 }
2002 
2003 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2004                                                                             u2* const checked_exceptions_length,
2005                                                                             u4 method_attribute_length,
2006                                                                             TRAPS) {
2007   assert(cfs != NULL, "invariant");
2008   assert(checked_exceptions_length != NULL, "invariant");
2009 
2010   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
2011   *checked_exceptions_length = cfs->get_u2_fast();
2012   const unsigned int size =
2013     (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2014   const unsafe_u2* const checked_exceptions_start = cfs->current();
2015   assert(checked_exceptions_start != NULL, "null checked exceptions");
2016   if (!_need_verify) {
2017     cfs->skip_u2_fast(size);
2018   } else {
2019     // Verify each value in the checked exception table
2020     u2 checked_exception;
2021     const u2 len = *checked_exceptions_length;
2022     cfs->guarantee_more(2 * len, CHECK_NULL);
2023     for (int i = 0; i < len; i++) {
2024       checked_exception = cfs->get_u2_fast();
2025       check_property(
2026         valid_klass_reference_at(checked_exception),
2027         "Exception name has bad type at constant pool %u in class file %s",
2028         checked_exception, CHECK_NULL);
2029     }
2030   }
2031   // check exceptions attribute length
2032   if (_need_verify) {
2033     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2034                                                    sizeof(u2) * size),
2035                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2036   }
2037   return checked_exceptions_start;
2038 }
2039 
2040 void ClassFileParser::throwIllegalSignature(const char* type,
2041                                             const Symbol* name,
2042                                             const Symbol* sig,
2043                                             TRAPS) const {
2044   assert(name != NULL, "invariant");
2045   assert(sig != NULL, "invariant");
2046 
2047   ResourceMark rm(THREAD);
2048   Exceptions::fthrow(THREAD_AND_LOCATION,
2049       vmSymbols::java_lang_ClassFormatError(),
2050       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2051       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2052 }
2053 
2054 AnnotationCollector::ID
2055 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2056                                       const Symbol* name) {
2057   const vmSymbols::SID sid = vmSymbols::find_sid(name);
2058   // Privileged code can use all annotations.  Other code silently drops some.
2059   const bool privileged = loader_data->is_the_null_class_loader_data() ||
2060                           loader_data->is_platform_class_loader_data() ||
2061                           loader_data->is_unsafe_anonymous();
2062   switch (sid) {
2063     case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2064       if (_location != _in_method)  break;  // only allow for methods
2065       if (!privileged)              break;  // only allow in privileged code
2066       return _method_CallerSensitive;
2067     }
2068     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2069       if (_location != _in_method)  break;  // only allow for methods
2070       if (!privileged)              break;  // only allow in privileged code
2071       return _method_ForceInline;
2072     }
2073     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2074       if (_location != _in_method)  break;  // only allow for methods
2075       if (!privileged)              break;  // only allow in privileged code
2076       return _method_DontInline;
2077     }
2078     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2079       if (_location != _in_method)  break;  // only allow for methods
2080       if (!privileged)              break;  // only allow in privileged code
2081       return _method_InjectedProfile;
2082     }
2083     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2084       if (_location != _in_method)  break;  // only allow for methods
2085       if (!privileged)              break;  // only allow in privileged code
2086       return _method_LambdaForm_Compiled;
2087     }
2088     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2089       if (_location != _in_method)  break;  // only allow for methods
2090       if (!privileged)              break;  // only allow in privileged code
2091       return _method_Hidden;
2092     }
2093     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2094       if (_location != _in_method)  break;  // only allow for methods
2095       if (!privileged)              break;  // only allow in privileged code
2096       return _method_HotSpotIntrinsicCandidate;
2097     }
2098     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2099       if (_location != _in_field)   break;  // only allow for fields
2100       if (!privileged)              break;  // only allow in privileged code
2101       return _field_Stable;
2102     }
2103     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2104       if (_location != _in_field && _location != _in_class) {
2105         break;  // only allow for fields and classes
2106       }
2107       if (!EnableContended || (RestrictContended && !privileged)) {
2108         break;  // honor privileges
2109       }
2110       return _jdk_internal_vm_annotation_Contended;
2111     }
2112     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2113       if (_location != _in_method)  break;  // only allow for methods
2114       if (RestrictReservedStack && !privileged) break; // honor privileges
2115       return _jdk_internal_vm_annotation_ReservedStackAccess;
2116     }
2117     default: {
2118       break;
2119     }
2120   }
2121   return AnnotationCollector::_unknown;
2122 }
2123 
2124 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2125   if (is_contended())
2126     f->set_contended_group(contended_group());
2127   if (is_stable())
2128     f->set_stable(true);
2129 }
2130 
2131 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2132   // If there's an error deallocate metadata for field annotations
2133   MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2134   MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2135 }
2136 
2137 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2138   if (has_annotation(_method_CallerSensitive))
2139     m->set_caller_sensitive(true);
2140   if (has_annotation(_method_ForceInline))
2141     m->set_force_inline(true);
2142   if (has_annotation(_method_DontInline))
2143     m->set_dont_inline(true);
2144   if (has_annotation(_method_InjectedProfile))
2145     m->set_has_injected_profile(true);
2146   if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2147     m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2148   if (has_annotation(_method_Hidden))
2149     m->set_hidden(true);
2150   if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2151     m->set_intrinsic_candidate(true);
2152   if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2153     m->set_has_reserved_stack_access(true);
2154 }
2155 
2156 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2157   assert(ik != NULL, "invariant");
2158   ik->set_is_contended(is_contended());
2159 }
2160 
2161 #define MAX_ARGS_SIZE 255
2162 #define MAX_CODE_SIZE 65535
2163 #define INITIAL_MAX_LVT_NUMBER 256
2164 
2165 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2166  *
2167  * Rules for LVT's and LVTT's are:
2168  *   - There can be any number of LVT's and LVTT's.
2169  *   - If there are n LVT's, it is the same as if there was just
2170  *     one LVT containing all the entries from the n LVT's.
2171  *   - There may be no more than one LVT entry per local variable.
2172  *     Two LVT entries are 'equal' if these fields are the same:
2173  *        start_pc, length, name, slot
2174  *   - There may be no more than one LVTT entry per each LVT entry.
2175  *     Each LVTT entry has to match some LVT entry.
2176  *   - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2177  */
2178 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2179                                                int lvt_cnt,
2180                                                u2* const localvariable_table_length,
2181                                                const unsafe_u2** const localvariable_table_start,
2182                                                int lvtt_cnt,
2183                                                u2* const localvariable_type_table_length,
2184                                                const unsafe_u2** const localvariable_type_table_start,
2185                                                TRAPS) {
2186 
2187   ResourceMark rm(THREAD);
2188 
2189   typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2190                             &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2191 
2192   LVT_HashTable* const table = new LVT_HashTable();
2193 
2194   // To fill LocalVariableTable in
2195   const Classfile_LVT_Element* cf_lvt;
2196   LocalVariableTableElement* lvt = cm->localvariable_table_start();
2197 
2198   for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2199     cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2200     for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2201       copy_lvt_element(&cf_lvt[idx], lvt);
2202       // If no duplicates, add LVT elem in hashtable.
2203       if (table->put(*lvt, lvt) == false
2204           && _need_verify
2205           && _major_version >= JAVA_1_5_VERSION) {
2206         classfile_parse_error("Duplicated LocalVariableTable attribute "
2207                               "entry for '%s' in class file %s",
2208                                _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2209                                CHECK);
2210       }
2211     }
2212   }
2213 
2214   // To merge LocalVariableTable and LocalVariableTypeTable
2215   const Classfile_LVT_Element* cf_lvtt;
2216   LocalVariableTableElement lvtt_elem;
2217 
2218   for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2219     cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2220     for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2221       copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2222       LocalVariableTableElement** entry = table->get(lvtt_elem);
2223       if (entry == NULL) {
2224         if (_need_verify) {
2225           classfile_parse_error("LVTT entry for '%s' in class file %s "
2226                                 "does not match any LVT entry",
2227                                  _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2228                                  CHECK);
2229         }
2230       } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2231         classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2232                               "entry for '%s' in class file %s",
2233                                _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2234                                CHECK);
2235       } else {
2236         // to add generic signatures into LocalVariableTable
2237         (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2238       }
2239     }
2240   }
2241 }
2242 
2243 
2244 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2245                                        const u1* runtime_visible_annotations,
2246                                        int runtime_visible_annotations_length,
2247                                        const u1* runtime_invisible_annotations,
2248                                        int runtime_invisible_annotations_length,
2249                                        const u1* runtime_visible_parameter_annotations,
2250                                        int runtime_visible_parameter_annotations_length,
2251                                        const u1* runtime_invisible_parameter_annotations,
2252                                        int runtime_invisible_parameter_annotations_length,
2253                                        const u1* runtime_visible_type_annotations,
2254                                        int runtime_visible_type_annotations_length,
2255                                        const u1* runtime_invisible_type_annotations,
2256                                        int runtime_invisible_type_annotations_length,
2257                                        const u1* annotation_default,
2258                                        int annotation_default_length,
2259                                        TRAPS) {
2260 
2261   AnnotationArray* a;
2262 
2263   if (runtime_visible_annotations_length +
2264       runtime_invisible_annotations_length > 0) {
2265      a = assemble_annotations(runtime_visible_annotations,
2266                               runtime_visible_annotations_length,
2267                               runtime_invisible_annotations,
2268                               runtime_invisible_annotations_length,
2269                               CHECK);
2270      cm->set_method_annotations(a);
2271   }
2272 
2273   if (runtime_visible_parameter_annotations_length +
2274       runtime_invisible_parameter_annotations_length > 0) {
2275     a = assemble_annotations(runtime_visible_parameter_annotations,
2276                              runtime_visible_parameter_annotations_length,
2277                              runtime_invisible_parameter_annotations,
2278                              runtime_invisible_parameter_annotations_length,
2279                              CHECK);
2280     cm->set_parameter_annotations(a);
2281   }
2282 
2283   if (annotation_default_length > 0) {
2284     a = assemble_annotations(annotation_default,
2285                              annotation_default_length,
2286                              NULL,
2287                              0,
2288                              CHECK);
2289     cm->set_default_annotations(a);
2290   }
2291 
2292   if (runtime_visible_type_annotations_length +
2293       runtime_invisible_type_annotations_length > 0) {
2294     a = assemble_annotations(runtime_visible_type_annotations,
2295                              runtime_visible_type_annotations_length,
2296                              runtime_invisible_type_annotations,
2297                              runtime_invisible_type_annotations_length,
2298                              CHECK);
2299     cm->set_type_annotations(a);
2300   }
2301 }
2302 
2303 
2304 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2305 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2306 // Method* to save footprint, so we only know the size of the resulting Method* when the
2307 // entire method attribute is parsed.
2308 //
2309 // The promoted_flags parameter is used to pass relevant access_flags
2310 // from the method back up to the containing klass. These flag values
2311 // are added to klass's access_flags.
2312 
2313 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2314                                       bool is_interface,
2315                                       const ConstantPool* cp,
2316                                       AccessFlags* const promoted_flags,
2317                                       TRAPS) {
2318   assert(cfs != NULL, "invariant");
2319   assert(cp != NULL, "invariant");
2320   assert(promoted_flags != NULL, "invariant");
2321 
2322   ResourceMark rm(THREAD);
2323   // Parse fixed parts:
2324   // access_flags, name_index, descriptor_index, attributes_count
2325   cfs->guarantee_more(8, CHECK_NULL);
2326 
2327   int flags = cfs->get_u2_fast();
2328   const u2 name_index = cfs->get_u2_fast();
2329   const int cp_size = cp->length();
2330   check_property(
2331     valid_symbol_at(name_index),
2332     "Illegal constant pool index %u for method name in class file %s",
2333     name_index, CHECK_NULL);
2334   const Symbol* const name = cp->symbol_at(name_index);
2335   verify_legal_method_name(name, CHECK_NULL);
2336 
2337   const u2 signature_index = cfs->get_u2_fast();
2338   guarantee_property(
2339     valid_symbol_at(signature_index),
2340     "Illegal constant pool index %u for method signature in class file %s",
2341     signature_index, CHECK_NULL);
2342   const Symbol* const signature = cp->symbol_at(signature_index);
2343 
2344   if (name == vmSymbols::class_initializer_name()) {
2345     // We ignore the other access flags for a valid class initializer.
2346     // (JVM Spec 2nd ed., chapter 4.6)
2347     if (_major_version < 51) { // backward compatibility
2348       flags = JVM_ACC_STATIC;
2349     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2350       flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2351     } else {
2352       classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2353     }
2354   } else {
2355     verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2356   }
2357 
2358   if (name == vmSymbols::object_initializer_name() && is_interface) {
2359     classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2360   }
2361 
2362   int args_size = -1;  // only used when _need_verify is true
2363   if (_need_verify) {
2364     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2365                  verify_legal_method_signature(name, signature, CHECK_NULL);
2366     if (args_size > MAX_ARGS_SIZE) {
2367       classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2368     }
2369   }
2370 
2371   AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2372 
2373   // Default values for code and exceptions attribute elements
2374   u2 max_stack = 0;
2375   u2 max_locals = 0;
2376   u4 code_length = 0;
2377   const u1* code_start = 0;
2378   u2 exception_table_length = 0;
2379   const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2380   Array<int>* exception_handlers = Universe::the_empty_int_array();
2381   u2 checked_exceptions_length = 0;
2382   const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2383   CompressedLineNumberWriteStream* linenumber_table = NULL;
2384   int linenumber_table_length = 0;
2385   int total_lvt_length = 0;
2386   u2 lvt_cnt = 0;
2387   u2 lvtt_cnt = 0;
2388   bool lvt_allocated = false;
2389   u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2390   u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2391   u2* localvariable_table_length = NULL;
2392   const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2393   u2* localvariable_type_table_length = NULL;
2394   const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2395   int method_parameters_length = -1;
2396   const u1* method_parameters_data = NULL;
2397   bool method_parameters_seen = false;
2398   bool parsed_code_attribute = false;
2399   bool parsed_checked_exceptions_attribute = false;
2400   bool parsed_stackmap_attribute = false;
2401   // stackmap attribute - JDK1.5
2402   const u1* stackmap_data = NULL;
2403   int stackmap_data_length = 0;
2404   u2 generic_signature_index = 0;
2405   MethodAnnotationCollector parsed_annotations;
2406   const u1* runtime_visible_annotations = NULL;
2407   int runtime_visible_annotations_length = 0;
2408   const u1* runtime_invisible_annotations = NULL;
2409   int runtime_invisible_annotations_length = 0;
2410   const u1* runtime_visible_parameter_annotations = NULL;
2411   int runtime_visible_parameter_annotations_length = 0;
2412   const u1* runtime_invisible_parameter_annotations = NULL;
2413   int runtime_invisible_parameter_annotations_length = 0;
2414   const u1* runtime_visible_type_annotations = NULL;
2415   int runtime_visible_type_annotations_length = 0;
2416   const u1* runtime_invisible_type_annotations = NULL;
2417   int runtime_invisible_type_annotations_length = 0;
2418   bool runtime_invisible_annotations_exists = false;
2419   bool runtime_invisible_type_annotations_exists = false;
2420   bool runtime_invisible_parameter_annotations_exists = false;
2421   const u1* annotation_default = NULL;
2422   int annotation_default_length = 0;
2423 
2424   // Parse code and exceptions attribute
2425   u2 method_attributes_count = cfs->get_u2_fast();
2426   while (method_attributes_count--) {
2427     cfs->guarantee_more(6, CHECK_NULL);  // method_attribute_name_index, method_attribute_length
2428     const u2 method_attribute_name_index = cfs->get_u2_fast();
2429     const u4 method_attribute_length = cfs->get_u4_fast();
2430     check_property(
2431       valid_symbol_at(method_attribute_name_index),
2432       "Invalid method attribute name index %u in class file %s",
2433       method_attribute_name_index, CHECK_NULL);
2434 
2435     const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2436     if (method_attribute_name == vmSymbols::tag_code()) {
2437       // Parse Code attribute
2438       if (_need_verify) {
2439         guarantee_property(
2440             !access_flags.is_native() && !access_flags.is_abstract(),
2441                         "Code attribute in native or abstract methods in class file %s",
2442                          CHECK_NULL);
2443       }
2444       if (parsed_code_attribute) {
2445         classfile_parse_error("Multiple Code attributes in class file %s",
2446                               CHECK_NULL);
2447       }
2448       parsed_code_attribute = true;
2449 
2450       // Stack size, locals size, and code size
2451       if (_major_version == 45 && _minor_version <= 2) {
2452         cfs->guarantee_more(4, CHECK_NULL);
2453         max_stack = cfs->get_u1_fast();
2454         max_locals = cfs->get_u1_fast();
2455         code_length = cfs->get_u2_fast();
2456       } else {
2457         cfs->guarantee_more(8, CHECK_NULL);
2458         max_stack = cfs->get_u2_fast();
2459         max_locals = cfs->get_u2_fast();
2460         code_length = cfs->get_u4_fast();
2461       }
2462       if (_need_verify) {
2463         guarantee_property(args_size <= max_locals,
2464                            "Arguments can't fit into locals in class file %s",
2465                            CHECK_NULL);
2466         guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2467                            "Invalid method Code length %u in class file %s",
2468                            code_length, CHECK_NULL);
2469       }
2470       // Code pointer
2471       code_start = cfs->current();
2472       assert(code_start != NULL, "null code start");
2473       cfs->guarantee_more(code_length, CHECK_NULL);
2474       cfs->skip_u1_fast(code_length);
2475 
2476       // Exception handler table
2477       cfs->guarantee_more(2, CHECK_NULL);  // exception_table_length
2478       exception_table_length = cfs->get_u2_fast();
2479       if (exception_table_length > 0) {
2480         exception_table_start = parse_exception_table(cfs,
2481                                                       code_length,
2482                                                       exception_table_length,
2483                                                       CHECK_NULL);
2484       }
2485 
2486       // Parse additional attributes in code attribute
2487       cfs->guarantee_more(2, CHECK_NULL);  // code_attributes_count
2488       u2 code_attributes_count = cfs->get_u2_fast();
2489 
2490       unsigned int calculated_attribute_length = 0;
2491 
2492       if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2493         calculated_attribute_length =
2494             sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2495       } else {
2496         // max_stack, locals and length are smaller in pre-version 45.2 classes
2497         calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2498       }
2499       calculated_attribute_length +=
2500         code_length +
2501         sizeof(exception_table_length) +
2502         sizeof(code_attributes_count) +
2503         exception_table_length *
2504             ( sizeof(u2) +   // start_pc
2505               sizeof(u2) +   // end_pc
2506               sizeof(u2) +   // handler_pc
2507               sizeof(u2) );  // catch_type_index
2508 
2509       while (code_attributes_count--) {
2510         cfs->guarantee_more(6, CHECK_NULL);  // code_attribute_name_index, code_attribute_length
2511         const u2 code_attribute_name_index = cfs->get_u2_fast();
2512         const u4 code_attribute_length = cfs->get_u4_fast();
2513         calculated_attribute_length += code_attribute_length +
2514                                        sizeof(code_attribute_name_index) +
2515                                        sizeof(code_attribute_length);
2516         check_property(valid_symbol_at(code_attribute_name_index),
2517                        "Invalid code attribute name index %u in class file %s",
2518                        code_attribute_name_index,
2519                        CHECK_NULL);
2520         if (LoadLineNumberTables &&
2521             cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2522           // Parse and compress line number table
2523           parse_linenumber_table(code_attribute_length,
2524                                  code_length,
2525                                  &linenumber_table,
2526                                  CHECK_NULL);
2527 
2528         } else if (LoadLocalVariableTables &&
2529                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2530           // Parse local variable table
2531           if (!lvt_allocated) {
2532             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2533               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2534             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2535               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2536             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2537               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2538             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2539               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2540             lvt_allocated = true;
2541           }
2542           if (lvt_cnt == max_lvt_cnt) {
2543             max_lvt_cnt <<= 1;
2544             localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2545             localvariable_table_start  = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2546           }
2547           localvariable_table_start[lvt_cnt] =
2548             parse_localvariable_table(cfs,
2549                                       code_length,
2550                                       max_locals,
2551                                       code_attribute_length,
2552                                       &localvariable_table_length[lvt_cnt],
2553                                       false,    // is not LVTT
2554                                       CHECK_NULL);
2555           total_lvt_length += localvariable_table_length[lvt_cnt];
2556           lvt_cnt++;
2557         } else if (LoadLocalVariableTypeTables &&
2558                    _major_version >= JAVA_1_5_VERSION &&
2559                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2560           if (!lvt_allocated) {
2561             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2562               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2563             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2564               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2565             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2566               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2567             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2568               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2569             lvt_allocated = true;
2570           }
2571           // Parse local variable type table
2572           if (lvtt_cnt == max_lvtt_cnt) {
2573             max_lvtt_cnt <<= 1;
2574             localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2575             localvariable_type_table_start  = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2576           }
2577           localvariable_type_table_start[lvtt_cnt] =
2578             parse_localvariable_table(cfs,
2579                                       code_length,
2580                                       max_locals,
2581                                       code_attribute_length,
2582                                       &localvariable_type_table_length[lvtt_cnt],
2583                                       true,     // is LVTT
2584                                       CHECK_NULL);
2585           lvtt_cnt++;
2586         } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2587                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2588           // Stack map is only needed by the new verifier in JDK1.5.
2589           if (parsed_stackmap_attribute) {
2590             classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2591           }
2592           stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2593           stackmap_data_length = code_attribute_length;
2594           parsed_stackmap_attribute = true;
2595         } else {
2596           // Skip unknown attributes
2597           cfs->skip_u1(code_attribute_length, CHECK_NULL);
2598         }
2599       }
2600       // check method attribute length
2601       if (_need_verify) {
2602         guarantee_property(method_attribute_length == calculated_attribute_length,
2603                            "Code segment has wrong length in class file %s",
2604                            CHECK_NULL);
2605       }
2606     } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2607       // Parse Exceptions attribute
2608       if (parsed_checked_exceptions_attribute) {
2609         classfile_parse_error("Multiple Exceptions attributes in class file %s",
2610                               CHECK_NULL);
2611       }
2612       parsed_checked_exceptions_attribute = true;
2613       checked_exceptions_start =
2614             parse_checked_exceptions(cfs,
2615                                      &checked_exceptions_length,
2616                                      method_attribute_length,
2617                                      CHECK_NULL);
2618     } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2619       // reject multiple method parameters
2620       if (method_parameters_seen) {
2621         classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2622                               CHECK_NULL);
2623       }
2624       method_parameters_seen = true;
2625       method_parameters_length = cfs->get_u1_fast();
2626       const u2 real_length = (method_parameters_length * 4u) + 1u;
2627       if (method_attribute_length != real_length) {
2628         classfile_parse_error(
2629           "Invalid MethodParameters method attribute length %u in class file",
2630           method_attribute_length, CHECK_NULL);
2631       }
2632       method_parameters_data = cfs->current();
2633       cfs->skip_u2_fast(method_parameters_length);
2634       cfs->skip_u2_fast(method_parameters_length);
2635       // ignore this attribute if it cannot be reflected
2636       if (!SystemDictionary::Parameter_klass_loaded())
2637         method_parameters_length = -1;
2638     } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2639       if (method_attribute_length != 0) {
2640         classfile_parse_error(
2641           "Invalid Synthetic method attribute length %u in class file %s",
2642           method_attribute_length, CHECK_NULL);
2643       }
2644       // Should we check that there hasn't already been a synthetic attribute?
2645       access_flags.set_is_synthetic();
2646     } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2647       if (method_attribute_length != 0) {
2648         classfile_parse_error(
2649           "Invalid Deprecated method attribute length %u in class file %s",
2650           method_attribute_length, CHECK_NULL);
2651       }
2652     } else if (_major_version >= JAVA_1_5_VERSION) {
2653       if (method_attribute_name == vmSymbols::tag_signature()) {
2654         if (generic_signature_index != 0) {
2655           classfile_parse_error(
2656             "Multiple Signature attributes for method in class file %s",
2657             CHECK_NULL);
2658         }
2659         if (method_attribute_length != 2) {
2660           classfile_parse_error(
2661             "Invalid Signature attribute length %u in class file %s",
2662             method_attribute_length, CHECK_NULL);
2663         }
2664         generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2665       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2666         if (runtime_visible_annotations != NULL) {
2667           classfile_parse_error(
2668             "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2669             CHECK_NULL);
2670         }
2671         runtime_visible_annotations_length = method_attribute_length;
2672         runtime_visible_annotations = cfs->current();
2673         assert(runtime_visible_annotations != NULL, "null visible annotations");
2674         cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2675         parse_annotations(cp,
2676                           runtime_visible_annotations,
2677                           runtime_visible_annotations_length,
2678                           &parsed_annotations,
2679                           _loader_data,
2680                           CHECK_NULL);
2681         cfs->skip_u1_fast(runtime_visible_annotations_length);
2682       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2683         if (runtime_invisible_annotations_exists) {
2684           classfile_parse_error(
2685             "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2686             CHECK_NULL);
2687         }
2688         runtime_invisible_annotations_exists = true;
2689         if (PreserveAllAnnotations) {
2690           runtime_invisible_annotations_length = method_attribute_length;
2691           runtime_invisible_annotations = cfs->current();
2692           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2693         }
2694         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2695       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2696         if (runtime_visible_parameter_annotations != NULL) {
2697           classfile_parse_error(
2698             "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2699             CHECK_NULL);
2700         }
2701         runtime_visible_parameter_annotations_length = method_attribute_length;
2702         runtime_visible_parameter_annotations = cfs->current();
2703         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2704         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2705       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2706         if (runtime_invisible_parameter_annotations_exists) {
2707           classfile_parse_error(
2708             "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2709             CHECK_NULL);
2710         }
2711         runtime_invisible_parameter_annotations_exists = true;
2712         if (PreserveAllAnnotations) {
2713           runtime_invisible_parameter_annotations_length = method_attribute_length;
2714           runtime_invisible_parameter_annotations = cfs->current();
2715           assert(runtime_invisible_parameter_annotations != NULL,
2716             "null invisible parameter annotations");
2717         }
2718         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2719       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2720         if (annotation_default != NULL) {
2721           classfile_parse_error(
2722             "Multiple AnnotationDefault attributes for method in class file %s",
2723             CHECK_NULL);
2724         }
2725         annotation_default_length = method_attribute_length;
2726         annotation_default = cfs->current();
2727         assert(annotation_default != NULL, "null annotation default");
2728         cfs->skip_u1(annotation_default_length, CHECK_NULL);
2729       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2730         if (runtime_visible_type_annotations != NULL) {
2731           classfile_parse_error(
2732             "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2733             CHECK_NULL);
2734         }
2735         runtime_visible_type_annotations_length = method_attribute_length;
2736         runtime_visible_type_annotations = cfs->current();
2737         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2738         // No need for the VM to parse Type annotations
2739         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2740       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2741         if (runtime_invisible_type_annotations_exists) {
2742           classfile_parse_error(
2743             "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2744             CHECK_NULL);
2745         } else {
2746           runtime_invisible_type_annotations_exists = true;
2747         }
2748         if (PreserveAllAnnotations) {
2749           runtime_invisible_type_annotations_length = method_attribute_length;
2750           runtime_invisible_type_annotations = cfs->current();
2751           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2752         }
2753         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2754       } else {
2755         // Skip unknown attributes
2756         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2757       }
2758     } else {
2759       // Skip unknown attributes
2760       cfs->skip_u1(method_attribute_length, CHECK_NULL);
2761     }
2762   }
2763 
2764   if (linenumber_table != NULL) {
2765     linenumber_table->write_terminator();
2766     linenumber_table_length = linenumber_table->position();
2767   }
2768 
2769   // Make sure there's at least one Code attribute in non-native/non-abstract method
2770   if (_need_verify) {
2771     guarantee_property(access_flags.is_native() ||
2772                        access_flags.is_abstract() ||
2773                        parsed_code_attribute,
2774                        "Absent Code attribute in method that is not native or abstract in class file %s",
2775                        CHECK_NULL);
2776   }
2777 
2778   // All sizing information for a Method* is finally available, now create it
2779   InlineTableSizes sizes(
2780       total_lvt_length,
2781       linenumber_table_length,
2782       exception_table_length,
2783       checked_exceptions_length,
2784       method_parameters_length,
2785       generic_signature_index,
2786       runtime_visible_annotations_length +
2787            runtime_invisible_annotations_length,
2788       runtime_visible_parameter_annotations_length +
2789            runtime_invisible_parameter_annotations_length,
2790       runtime_visible_type_annotations_length +
2791            runtime_invisible_type_annotations_length,
2792       annotation_default_length,
2793       0);
2794 
2795   Method* const m = Method::allocate(_loader_data,
2796                                      code_length,
2797                                      access_flags,
2798                                      &sizes,
2799                                      ConstMethod::NORMAL,
2800                                      CHECK_NULL);
2801 
2802   ClassLoadingService::add_class_method_size(m->size()*wordSize);
2803 
2804   // Fill in information from fixed part (access_flags already set)
2805   m->set_constants(_cp);
2806   m->set_name_index(name_index);
2807   m->set_signature_index(signature_index);
2808 
2809   ResultTypeFinder rtf(cp->symbol_at(signature_index));
2810   m->constMethod()->set_result_type(rtf.type());
2811 
2812   if (args_size >= 0) {
2813     m->set_size_of_parameters(args_size);
2814   } else {
2815     m->compute_size_of_parameters(THREAD);
2816   }
2817 #ifdef ASSERT
2818   if (args_size >= 0) {
2819     m->compute_size_of_parameters(THREAD);
2820     assert(args_size == m->size_of_parameters(), "");
2821   }
2822 #endif
2823 
2824   // Fill in code attribute information
2825   m->set_max_stack(max_stack);
2826   m->set_max_locals(max_locals);
2827   if (stackmap_data != NULL) {
2828     m->constMethod()->copy_stackmap_data(_loader_data,
2829                                          (u1*)stackmap_data,
2830                                          stackmap_data_length,
2831                                          CHECK_NULL);
2832   }
2833 
2834   // Copy byte codes
2835   m->set_code((u1*)code_start);
2836 
2837   // Copy line number table
2838   if (linenumber_table != NULL) {
2839     memcpy(m->compressed_linenumber_table(),
2840            linenumber_table->buffer(),
2841            linenumber_table_length);
2842   }
2843 
2844   // Copy exception table
2845   if (exception_table_length > 0) {
2846     Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2847                                                 m->exception_table_start(),
2848                                                 exception_table_length * sizeof(ExceptionTableElement),
2849                                                 sizeof(u2));
2850   }
2851 
2852   // Copy method parameters
2853   if (method_parameters_length > 0) {
2854     MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2855     for (int i = 0; i < method_parameters_length; i++) {
2856       elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2857       method_parameters_data += 2;
2858       elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2859       method_parameters_data += 2;
2860     }
2861   }
2862 
2863   // Copy checked exceptions
2864   if (checked_exceptions_length > 0) {
2865     Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2866                                                 m->checked_exceptions_start(),
2867                                                 checked_exceptions_length * sizeof(CheckedExceptionElement),
2868                                                 sizeof(u2));
2869   }
2870 
2871   // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2872   if (total_lvt_length > 0) {
2873     promoted_flags->set_has_localvariable_table();
2874     copy_localvariable_table(m->constMethod(),
2875                              lvt_cnt,
2876                              localvariable_table_length,
2877                              localvariable_table_start,
2878                              lvtt_cnt,
2879                              localvariable_type_table_length,
2880                              localvariable_type_table_start,
2881                              CHECK_NULL);
2882   }
2883 
2884   if (parsed_annotations.has_any_annotations())
2885     parsed_annotations.apply_to(m);
2886 
2887   // Copy annotations
2888   copy_method_annotations(m->constMethod(),
2889                           runtime_visible_annotations,
2890                           runtime_visible_annotations_length,
2891                           runtime_invisible_annotations,
2892                           runtime_invisible_annotations_length,
2893                           runtime_visible_parameter_annotations,
2894                           runtime_visible_parameter_annotations_length,
2895                           runtime_invisible_parameter_annotations,
2896                           runtime_invisible_parameter_annotations_length,
2897                           runtime_visible_type_annotations,
2898                           runtime_visible_type_annotations_length,
2899                           runtime_invisible_type_annotations,
2900                           runtime_invisible_type_annotations_length,
2901                           annotation_default,
2902                           annotation_default_length,
2903                           CHECK_NULL);
2904 
2905   if (name == vmSymbols::finalize_method_name() &&
2906       signature == vmSymbols::void_method_signature()) {
2907     if (m->is_empty_method()) {
2908       _has_empty_finalizer = true;
2909     } else {
2910       _has_finalizer = true;
2911     }
2912   }
2913   if (name == vmSymbols::object_initializer_name() &&
2914       signature == vmSymbols::void_method_signature() &&
2915       m->is_vanilla_constructor()) {
2916     _has_vanilla_constructor = true;
2917   }
2918 
2919   NOT_PRODUCT(m->verify());
2920   return m;
2921 }
2922 
2923 
2924 // The promoted_flags parameter is used to pass relevant access_flags
2925 // from the methods back up to the containing klass. These flag values
2926 // are added to klass's access_flags.
2927 // Side-effects: populates the _methods field in the parser
2928 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2929                                     bool is_interface,
2930                                     AccessFlags* promoted_flags,
2931                                     bool* has_final_method,
2932                                     bool* declares_nonstatic_concrete_methods,
2933                                     TRAPS) {
2934   assert(cfs != NULL, "invariant");
2935   assert(promoted_flags != NULL, "invariant");
2936   assert(has_final_method != NULL, "invariant");
2937   assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2938 
2939   assert(NULL == _methods, "invariant");
2940 
2941   cfs->guarantee_more(2, CHECK);  // length
2942   const u2 length = cfs->get_u2_fast();
2943   if (length == 0) {
2944     _methods = Universe::the_empty_method_array();
2945   } else {
2946     _methods = MetadataFactory::new_array<Method*>(_loader_data,
2947                                                    length,
2948                                                    NULL,
2949                                                    CHECK);
2950 
2951     for (int index = 0; index < length; index++) {
2952       Method* method = parse_method(cfs,
2953                                     is_interface,
2954                                     _cp,
2955                                     promoted_flags,
2956                                     CHECK);
2957 
2958       if (method->is_final()) {
2959         *has_final_method = true;
2960       }
2961       // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2962       // used for interface initialization, and default method inheritance analysis
2963       if (is_interface && !(*declares_nonstatic_concrete_methods)
2964         && !method->is_abstract() && !method->is_static()) {
2965         *declares_nonstatic_concrete_methods = true;
2966       }
2967       _methods->at_put(index, method);
2968     }
2969 
2970     if (_need_verify && length > 1) {
2971       // Check duplicated methods
2972       ResourceMark rm(THREAD);
2973       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2974         THREAD, NameSigHash*, HASH_ROW_SIZE);
2975       initialize_hashtable(names_and_sigs);
2976       bool dup = false;
2977       const Symbol* name = NULL;
2978       const Symbol* sig = NULL;
2979       {
2980         debug_only(NoSafepointVerifier nsv;)
2981         for (int i = 0; i < length; i++) {
2982           const Method* const m = _methods->at(i);
2983           name = m->name();
2984           sig = m->signature();
2985           // If no duplicates, add name/signature in hashtable names_and_sigs.
2986           if (!put_after_lookup(name, sig, names_and_sigs)) {
2987             dup = true;
2988             break;
2989           }
2990         }
2991       }
2992       if (dup) {
2993         classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2994                                name->as_C_string(), sig->as_klass_external_name(), CHECK);
2995       }
2996     }
2997   }
2998 }
2999 
3000 static const intArray* sort_methods(Array<Method*>* methods) {
3001   const int length = methods->length();
3002   // If JVMTI original method ordering or sharing is enabled we have to
3003   // remember the original class file ordering.
3004   // We temporarily use the vtable_index field in the Method* to store the
3005   // class file index, so we can read in after calling qsort.
3006   // Put the method ordering in the shared archive.
3007   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3008     for (int index = 0; index < length; index++) {
3009       Method* const m = methods->at(index);
3010       assert(!m->valid_vtable_index(), "vtable index should not be set");
3011       m->set_vtable_index(index);
3012     }
3013   }
3014   // Sort method array by ascending method name (for faster lookups & vtable construction)
3015   // Note that the ordering is not alphabetical, see Symbol::fast_compare
3016   Method::sort_methods(methods);
3017 
3018   intArray* method_ordering = NULL;
3019   // If JVMTI original method ordering or sharing is enabled construct int
3020   // array remembering the original ordering
3021   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3022     method_ordering = new intArray(length, length, -1);
3023     for (int index = 0; index < length; index++) {
3024       Method* const m = methods->at(index);
3025       const int old_index = m->vtable_index();
3026       assert(old_index >= 0 && old_index < length, "invalid method index");
3027       method_ordering->at_put(index, old_index);
3028       m->set_vtable_index(Method::invalid_vtable_index);
3029     }
3030   }
3031   return method_ordering;
3032 }
3033 
3034 // Parse generic_signature attribute for methods and fields
3035 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3036                                                       TRAPS) {
3037   assert(cfs != NULL, "invariant");
3038 
3039   cfs->guarantee_more(2, CHECK_0);  // generic_signature_index
3040   const u2 generic_signature_index = cfs->get_u2_fast();
3041   check_property(
3042     valid_symbol_at(generic_signature_index),
3043     "Invalid Signature attribute at constant pool index %u in class file %s",
3044     generic_signature_index, CHECK_0);
3045   return generic_signature_index;
3046 }
3047 
3048 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3049                                                            TRAPS) {
3050 
3051   assert(cfs != NULL, "invariant");
3052 
3053   cfs->guarantee_more(2, CHECK);  // sourcefile_index
3054   const u2 sourcefile_index = cfs->get_u2_fast();
3055   check_property(
3056     valid_symbol_at(sourcefile_index),
3057     "Invalid SourceFile attribute at constant pool index %u in class file %s",
3058     sourcefile_index, CHECK);
3059   set_class_sourcefile_index(sourcefile_index);
3060 }
3061 
3062 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3063                                                                        int length,
3064                                                                        TRAPS) {
3065   assert(cfs != NULL, "invariant");
3066 
3067   const u1* const sde_buffer = cfs->current();
3068   assert(sde_buffer != NULL, "null sde buffer");
3069 
3070   // Don't bother storing it if there is no way to retrieve it
3071   if (JvmtiExport::can_get_source_debug_extension()) {
3072     assert((length+1) > length, "Overflow checking");
3073     u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3074     for (int i = 0; i < length; i++) {
3075       sde[i] = sde_buffer[i];
3076     }
3077     sde[length] = '\0';
3078     set_class_sde_buffer((const char*)sde, length);
3079   }
3080   // Got utf8 string, set stream position forward
3081   cfs->skip_u1(length, CHECK);
3082 }
3083 
3084 
3085 // Inner classes can be static, private or protected (classic VM does this)
3086 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3087                                            JVM_ACC_PRIVATE |                \
3088                                            JVM_ACC_PROTECTED |              \
3089                                            JVM_ACC_STATIC                   \
3090                                          )
3091 
3092 // Return number of classes in the inner classes attribute table
3093 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3094                                                             const u1* const inner_classes_attribute_start,
3095                                                             bool parsed_enclosingmethod_attribute,
3096                                                             u2 enclosing_method_class_index,
3097                                                             u2 enclosing_method_method_index,
3098                                                             TRAPS) {
3099   const u1* const current_mark = cfs->current();
3100   u2 length = 0;
3101   if (inner_classes_attribute_start != NULL) {
3102     cfs->set_current(inner_classes_attribute_start);
3103     cfs->guarantee_more(2, CHECK_0);  // length
3104     length = cfs->get_u2_fast();
3105   }
3106 
3107   // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3108   // method data:
3109   //   [inner_class_info_index,
3110   //    outer_class_info_index,
3111   //    inner_name_index,
3112   //    inner_class_access_flags,
3113   //    ...
3114   //    enclosing_method_class_index,
3115   //    enclosing_method_method_index]
3116   const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3117   Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3118   _inner_classes = inner_classes;
3119 
3120   int index = 0;
3121   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
3122   for (int n = 0; n < length; n++) {
3123     // Inner class index
3124     const u2 inner_class_info_index = cfs->get_u2_fast();
3125     check_property(
3126       valid_klass_reference_at(inner_class_info_index),
3127       "inner_class_info_index %u has bad constant type in class file %s",
3128       inner_class_info_index, CHECK_0);
3129     // Outer class index
3130     const u2 outer_class_info_index = cfs->get_u2_fast();
3131     check_property(
3132       outer_class_info_index == 0 ||
3133         valid_klass_reference_at(outer_class_info_index),
3134       "outer_class_info_index %u has bad constant type in class file %s",
3135       outer_class_info_index, CHECK_0);
3136     // Inner class name
3137     const u2 inner_name_index = cfs->get_u2_fast();
3138     check_property(
3139       inner_name_index == 0 || valid_symbol_at(inner_name_index),
3140       "inner_name_index %u has bad constant type in class file %s",
3141       inner_name_index, CHECK_0);
3142     if (_need_verify) {
3143       guarantee_property(inner_class_info_index != outer_class_info_index,
3144                          "Class is both outer and inner class in class file %s", CHECK_0);
3145     }
3146     // Access flags
3147     jint flags;
3148     // JVM_ACC_MODULE is defined in JDK-9 and later.
3149     if (_major_version >= JAVA_9_VERSION) {
3150       flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3151     } else {
3152       flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3153     }
3154     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3155       // Set abstract bit for old class files for backward compatibility
3156       flags |= JVM_ACC_ABSTRACT;
3157     }
3158     verify_legal_class_modifiers(flags, CHECK_0);
3159     AccessFlags inner_access_flags(flags);
3160 
3161     inner_classes->at_put(index++, inner_class_info_index);
3162     inner_classes->at_put(index++, outer_class_info_index);
3163     inner_classes->at_put(index++, inner_name_index);
3164     inner_classes->at_put(index++, inner_access_flags.as_short());
3165   }
3166 
3167   // 4347400: make sure there's no duplicate entry in the classes array
3168   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3169     for(int i = 0; i < length * 4; i += 4) {
3170       for(int j = i + 4; j < length * 4; j += 4) {
3171         guarantee_property((inner_classes->at(i)   != inner_classes->at(j) ||
3172                             inner_classes->at(i+1) != inner_classes->at(j+1) ||
3173                             inner_classes->at(i+2) != inner_classes->at(j+2) ||
3174                             inner_classes->at(i+3) != inner_classes->at(j+3)),
3175                             "Duplicate entry in InnerClasses in class file %s",
3176                             CHECK_0);
3177       }
3178     }
3179   }
3180 
3181   // Set EnclosingMethod class and method indexes.
3182   if (parsed_enclosingmethod_attribute) {
3183     inner_classes->at_put(index++, enclosing_method_class_index);
3184     inner_classes->at_put(index++, enclosing_method_method_index);
3185   }
3186   assert(index == size, "wrong size");
3187 
3188   // Restore buffer's current position.
3189   cfs->set_current(current_mark);
3190 
3191   return length;
3192 }
3193 
3194 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3195                                                            const u1* const nest_members_attribute_start,
3196                                                            TRAPS) {
3197   const u1* const current_mark = cfs->current();
3198   u2 length = 0;
3199   if (nest_members_attribute_start != NULL) {
3200     cfs->set_current(nest_members_attribute_start);
3201     cfs->guarantee_more(2, CHECK_0);  // length
3202     length = cfs->get_u2_fast();
3203   }
3204   const int size = length;
3205   Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3206   _nest_members = nest_members;
3207 
3208   int index = 0;
3209   cfs->guarantee_more(2 * length, CHECK_0);
3210   for (int n = 0; n < length; n++) {
3211     const u2 class_info_index = cfs->get_u2_fast();
3212     check_property(
3213       valid_klass_reference_at(class_info_index),
3214       "Nest member class_info_index %u has bad constant type in class file %s",
3215       class_info_index, CHECK_0);
3216     nest_members->at_put(index++, class_info_index);
3217   }
3218   assert(index == size, "wrong size");
3219 
3220   // Restore buffer's current position.
3221   cfs->set_current(current_mark);
3222 
3223   return length;
3224 }
3225 
3226 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3227   set_class_synthetic_flag(true);
3228 }
3229 
3230 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3231   assert(cfs != NULL, "invariant");
3232 
3233   const u2 signature_index = cfs->get_u2(CHECK);
3234   check_property(
3235     valid_symbol_at(signature_index),
3236     "Invalid constant pool index %u in Signature attribute in class file %s",
3237     signature_index, CHECK);
3238   set_class_generic_signature_index(signature_index);
3239 }
3240 
3241 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3242                                                                   ConstantPool* cp,
3243                                                                   u4 attribute_byte_length,
3244                                                                   TRAPS) {
3245   assert(cfs != NULL, "invariant");
3246   assert(cp != NULL, "invariant");
3247 
3248   const u1* const current_start = cfs->current();
3249 
3250   guarantee_property(attribute_byte_length >= sizeof(u2),
3251                      "Invalid BootstrapMethods attribute length %u in class file %s",
3252                      attribute_byte_length,
3253                      CHECK);
3254 
3255   cfs->guarantee_more(attribute_byte_length, CHECK);
3256 
3257   const int attribute_array_length = cfs->get_u2_fast();
3258 
3259   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3260                      "Short length on BootstrapMethods in class file %s",
3261                      CHECK);
3262 
3263 
3264   // The attribute contains a counted array of counted tuples of shorts,
3265   // represending bootstrap specifiers:
3266   //    length*{bootstrap_method_index, argument_count*{argument_index}}
3267   const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3268   // operand_count = number of shorts in attr, except for leading length
3269 
3270   // The attribute is copied into a short[] array.
3271   // The array begins with a series of short[2] pairs, one for each tuple.
3272   const int index_size = (attribute_array_length * 2);
3273 
3274   Array<u2>* const operands =
3275     MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3276 
3277   // Eagerly assign operands so they will be deallocated with the constant
3278   // pool if there is an error.
3279   cp->set_operands(operands);
3280 
3281   int operand_fill_index = index_size;
3282   const int cp_size = cp->length();
3283 
3284   for (int n = 0; n < attribute_array_length; n++) {
3285     // Store a 32-bit offset into the header of the operand array.
3286     ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3287 
3288     // Read a bootstrap specifier.
3289     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
3290     const u2 bootstrap_method_index = cfs->get_u2_fast();
3291     const u2 argument_count = cfs->get_u2_fast();
3292     check_property(
3293       valid_cp_range(bootstrap_method_index, cp_size) &&
3294       cp->tag_at(bootstrap_method_index).is_method_handle(),
3295       "bootstrap_method_index %u has bad constant type in class file %s",
3296       bootstrap_method_index,
3297       CHECK);
3298 
3299     guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3300       "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3301       CHECK);
3302 
3303     operands->at_put(operand_fill_index++, bootstrap_method_index);
3304     operands->at_put(operand_fill_index++, argument_count);
3305 
3306     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
3307     for (int j = 0; j < argument_count; j++) {
3308       const u2 argument_index = cfs->get_u2_fast();
3309       check_property(
3310         valid_cp_range(argument_index, cp_size) &&
3311         cp->tag_at(argument_index).is_loadable_constant(),
3312         "argument_index %u has bad constant type in class file %s",
3313         argument_index,
3314         CHECK);
3315       operands->at_put(operand_fill_index++, argument_index);
3316     }
3317   }
3318   guarantee_property(current_start + attribute_byte_length == cfs->current(),
3319                      "Bad length on BootstrapMethods in class file %s",
3320                      CHECK);
3321 }
3322 
3323 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3324                                                  ConstantPool* cp,
3325                  ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3326                                                  TRAPS) {
3327   assert(cfs != NULL, "invariant");
3328   assert(cp != NULL, "invariant");
3329   assert(parsed_annotations != NULL, "invariant");
3330 
3331   // Set inner classes attribute to default sentinel
3332   _inner_classes = Universe::the_empty_short_array();
3333   // Set nest members attribute to default sentinel
3334   _nest_members = Universe::the_empty_short_array();
3335   cfs->guarantee_more(2, CHECK);  // attributes_count
3336   u2 attributes_count = cfs->get_u2_fast();
3337   bool parsed_sourcefile_attribute = false;
3338   bool parsed_innerclasses_attribute = false;
3339   bool parsed_nest_members_attribute = false;
3340   bool parsed_nest_host_attribute = false;
3341   bool parsed_enclosingmethod_attribute = false;
3342   bool parsed_bootstrap_methods_attribute = false;
3343   const u1* runtime_visible_annotations = NULL;
3344   int runtime_visible_annotations_length = 0;
3345   const u1* runtime_invisible_annotations = NULL;
3346   int runtime_invisible_annotations_length = 0;
3347   const u1* runtime_visible_type_annotations = NULL;
3348   int runtime_visible_type_annotations_length = 0;
3349   const u1* runtime_invisible_type_annotations = NULL;
3350   int runtime_invisible_type_annotations_length = 0;
3351   bool runtime_invisible_type_annotations_exists = false;
3352   bool runtime_invisible_annotations_exists = false;
3353   bool parsed_source_debug_ext_annotations_exist = false;
3354   const u1* inner_classes_attribute_start = NULL;
3355   u4  inner_classes_attribute_length = 0;
3356   u2  enclosing_method_class_index = 0;
3357   u2  enclosing_method_method_index = 0;
3358   const u1* nest_members_attribute_start = NULL;
3359   u4  nest_members_attribute_length = 0;
3360 
3361   // Iterate over attributes
3362   while (attributes_count--) {
3363     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
3364     const u2 attribute_name_index = cfs->get_u2_fast();
3365     const u4 attribute_length = cfs->get_u4_fast();
3366     check_property(
3367       valid_symbol_at(attribute_name_index),
3368       "Attribute name has bad constant pool index %u in class file %s",
3369       attribute_name_index, CHECK);
3370     const Symbol* const tag = cp->symbol_at(attribute_name_index);
3371     if (tag == vmSymbols::tag_source_file()) {
3372       // Check for SourceFile tag
3373       if (_need_verify) {
3374         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3375       }
3376       if (parsed_sourcefile_attribute) {
3377         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3378       } else {
3379         parsed_sourcefile_attribute = true;
3380       }
3381       parse_classfile_sourcefile_attribute(cfs, CHECK);
3382     } else if (tag == vmSymbols::tag_source_debug_extension()) {
3383       // Check for SourceDebugExtension tag
3384       if (parsed_source_debug_ext_annotations_exist) {
3385           classfile_parse_error(
3386             "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3387       }
3388       parsed_source_debug_ext_annotations_exist = true;
3389       parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3390     } else if (tag == vmSymbols::tag_inner_classes()) {
3391       // Check for InnerClasses tag
3392       if (parsed_innerclasses_attribute) {
3393         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3394       } else {
3395         parsed_innerclasses_attribute = true;
3396       }
3397       inner_classes_attribute_start = cfs->current();
3398       inner_classes_attribute_length = attribute_length;
3399       cfs->skip_u1(inner_classes_attribute_length, CHECK);
3400     } else if (tag == vmSymbols::tag_synthetic()) {
3401       // Check for Synthetic tag
3402       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3403       if (attribute_length != 0) {
3404         classfile_parse_error(
3405           "Invalid Synthetic classfile attribute length %u in class file %s",
3406           attribute_length, CHECK);
3407       }
3408       parse_classfile_synthetic_attribute(CHECK);
3409     } else if (tag == vmSymbols::tag_deprecated()) {
3410       // Check for Deprecatd tag - 4276120
3411       if (attribute_length != 0) {
3412         classfile_parse_error(
3413           "Invalid Deprecated classfile attribute length %u in class file %s",
3414           attribute_length, CHECK);
3415       }
3416     } else if (_major_version >= JAVA_1_5_VERSION) {
3417       if (tag == vmSymbols::tag_signature()) {
3418         if (_generic_signature_index != 0) {
3419           classfile_parse_error(
3420             "Multiple Signature attributes in class file %s", CHECK);
3421         }
3422         if (attribute_length != 2) {
3423           classfile_parse_error(
3424             "Wrong Signature attribute length %u in class file %s",
3425             attribute_length, CHECK);
3426         }
3427         parse_classfile_signature_attribute(cfs, CHECK);
3428       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3429         if (runtime_visible_annotations != NULL) {
3430           classfile_parse_error(
3431             "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3432         }
3433         runtime_visible_annotations_length = attribute_length;
3434         runtime_visible_annotations = cfs->current();
3435         assert(runtime_visible_annotations != NULL, "null visible annotations");
3436         cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3437         parse_annotations(cp,
3438                           runtime_visible_annotations,
3439                           runtime_visible_annotations_length,
3440                           parsed_annotations,
3441                           _loader_data,
3442                           CHECK);
3443         cfs->skip_u1_fast(runtime_visible_annotations_length);
3444       } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3445         if (runtime_invisible_annotations_exists) {
3446           classfile_parse_error(
3447             "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3448         }
3449         runtime_invisible_annotations_exists = true;
3450         if (PreserveAllAnnotations) {
3451           runtime_invisible_annotations_length = attribute_length;
3452           runtime_invisible_annotations = cfs->current();
3453           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3454         }
3455         cfs->skip_u1(attribute_length, CHECK);
3456       } else if (tag == vmSymbols::tag_enclosing_method()) {
3457         if (parsed_enclosingmethod_attribute) {
3458           classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3459         } else {
3460           parsed_enclosingmethod_attribute = true;
3461         }
3462         guarantee_property(attribute_length == 4,
3463           "Wrong EnclosingMethod attribute length %u in class file %s",
3464           attribute_length, CHECK);
3465         cfs->guarantee_more(4, CHECK);  // class_index, method_index
3466         enclosing_method_class_index  = cfs->get_u2_fast();
3467         enclosing_method_method_index = cfs->get_u2_fast();
3468         if (enclosing_method_class_index == 0) {
3469           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3470         }
3471         // Validate the constant pool indices and types
3472         check_property(valid_klass_reference_at(enclosing_method_class_index),
3473           "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3474         if (enclosing_method_method_index != 0 &&
3475             (!cp->is_within_bounds(enclosing_method_method_index) ||
3476              !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3477           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3478         }
3479       } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3480                  _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3481         if (parsed_bootstrap_methods_attribute) {
3482           classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3483         }
3484         parsed_bootstrap_methods_attribute = true;
3485         parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3486       } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3487         if (runtime_visible_type_annotations != NULL) {
3488           classfile_parse_error(
3489             "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3490         }
3491         runtime_visible_type_annotations_length = attribute_length;
3492         runtime_visible_type_annotations = cfs->current();
3493         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3494         // No need for the VM to parse Type annotations
3495         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3496       } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3497         if (runtime_invisible_type_annotations_exists) {
3498           classfile_parse_error(
3499             "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3500         } else {
3501           runtime_invisible_type_annotations_exists = true;
3502         }
3503         if (PreserveAllAnnotations) {
3504           runtime_invisible_type_annotations_length = attribute_length;
3505           runtime_invisible_type_annotations = cfs->current();
3506           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3507         }
3508         cfs->skip_u1(attribute_length, CHECK);
3509       } else if (_major_version >= JAVA_11_VERSION) {
3510         if (tag == vmSymbols::tag_nest_members()) {
3511           // Check for NestMembers tag
3512           if (parsed_nest_members_attribute) {
3513             classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3514           } else {
3515             parsed_nest_members_attribute = true;
3516           }
3517           if (parsed_nest_host_attribute) {
3518             classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3519           }
3520           nest_members_attribute_start = cfs->current();
3521           nest_members_attribute_length = attribute_length;
3522           cfs->skip_u1(nest_members_attribute_length, CHECK);
3523         } else if (tag == vmSymbols::tag_nest_host()) {
3524           if (parsed_nest_host_attribute) {
3525             classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3526           } else {
3527             parsed_nest_host_attribute = true;
3528           }
3529           if (parsed_nest_members_attribute) {
3530             classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3531           }
3532           if (_need_verify) {
3533             guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3534           }
3535           cfs->guarantee_more(2, CHECK);
3536           u2 class_info_index = cfs->get_u2_fast();
3537           check_property(
3538                          valid_klass_reference_at(class_info_index),
3539                          "Nest-host class_info_index %u has bad constant type in class file %s",
3540                          class_info_index, CHECK);
3541           _nest_host = class_info_index;
3542         } else {
3543           // Unknown attribute
3544           cfs->skip_u1(attribute_length, CHECK);
3545         }
3546       } else {
3547         // Unknown attribute
3548         cfs->skip_u1(attribute_length, CHECK);
3549       }
3550     } else {
3551       // Unknown attribute
3552       cfs->skip_u1(attribute_length, CHECK);
3553     }
3554   }
3555   _annotations = assemble_annotations(runtime_visible_annotations,
3556                                       runtime_visible_annotations_length,
3557                                       runtime_invisible_annotations,
3558                                       runtime_invisible_annotations_length,
3559                                       CHECK);
3560   _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3561                                            runtime_visible_type_annotations_length,
3562                                            runtime_invisible_type_annotations,
3563                                            runtime_invisible_type_annotations_length,
3564                                            CHECK);
3565 
3566   if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3567     const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3568                             cfs,
3569                             inner_classes_attribute_start,
3570                             parsed_innerclasses_attribute,
3571                             enclosing_method_class_index,
3572                             enclosing_method_method_index,
3573                             CHECK);
3574     if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3575       guarantee_property(
3576         inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3577         "Wrong InnerClasses attribute length in class file %s", CHECK);
3578     }
3579   }
3580 
3581   if (parsed_nest_members_attribute) {
3582     const u2 num_of_classes = parse_classfile_nest_members_attribute(
3583                             cfs,
3584                             nest_members_attribute_start,
3585                             CHECK);
3586     if (_need_verify) {
3587       guarantee_property(
3588         nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3589         "Wrong NestMembers attribute length in class file %s", CHECK);
3590     }
3591   }
3592 
3593   if (_max_bootstrap_specifier_index >= 0) {
3594     guarantee_property(parsed_bootstrap_methods_attribute,
3595                        "Missing BootstrapMethods attribute in class file %s", CHECK);
3596   }
3597 }
3598 
3599 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3600   assert(k != NULL, "invariant");
3601 
3602   if (_synthetic_flag)
3603     k->set_is_synthetic();
3604   if (_sourcefile_index != 0) {
3605     k->set_source_file_name_index(_sourcefile_index);
3606   }
3607   if (_generic_signature_index != 0) {
3608     k->set_generic_signature_index(_generic_signature_index);
3609   }
3610   if (_sde_buffer != NULL) {
3611     k->set_source_debug_extension(_sde_buffer, _sde_length);
3612   }
3613 }
3614 
3615 // Create the Annotations object that will
3616 // hold the annotations array for the Klass.
3617 void ClassFileParser::create_combined_annotations(TRAPS) {
3618     if (_annotations == NULL &&
3619         _type_annotations == NULL &&
3620         _fields_annotations == NULL &&
3621         _fields_type_annotations == NULL) {
3622       // Don't create the Annotations object unnecessarily.
3623       return;
3624     }
3625 
3626     Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3627     annotations->set_class_annotations(_annotations);
3628     annotations->set_class_type_annotations(_type_annotations);
3629     annotations->set_fields_annotations(_fields_annotations);
3630     annotations->set_fields_type_annotations(_fields_type_annotations);
3631 
3632     // This is the Annotations object that will be
3633     // assigned to InstanceKlass being constructed.
3634     _combined_annotations = annotations;
3635 
3636     // The annotations arrays below has been transfered the
3637     // _combined_annotations so these fields can now be cleared.
3638     _annotations             = NULL;
3639     _type_annotations        = NULL;
3640     _fields_annotations      = NULL;
3641     _fields_type_annotations = NULL;
3642 }
3643 
3644 // Transfer ownership of metadata allocated to the InstanceKlass.
3645 void ClassFileParser::apply_parsed_class_metadata(
3646                                             InstanceKlass* this_klass,
3647                                             int java_fields_count, TRAPS) {
3648   assert(this_klass != NULL, "invariant");
3649 
3650   _cp->set_pool_holder(this_klass);
3651   this_klass->set_constants(_cp);
3652   this_klass->set_fields(_fields, java_fields_count);
3653   this_klass->set_methods(_methods);
3654   this_klass->set_inner_classes(_inner_classes);
3655   this_klass->set_nest_members(_nest_members);
3656   this_klass->set_nest_host_index(_nest_host);
3657   this_klass->set_local_interfaces(_local_interfaces);
3658   this_klass->set_annotations(_combined_annotations);
3659   // Delay the setting of _transitive_interfaces until after initialize_supers() in
3660   // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3661   // its _super. If an OOM occurs while loading the current klass, its _super field
3662   // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3663   // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3664   // dereferences to the deallocated _transitive_interfaces will result in a crash.
3665 
3666   // Clear out these fields so they don't get deallocated by the destructor
3667   clear_class_metadata();
3668 }
3669 
3670 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3671                                                        int runtime_visible_annotations_length,
3672                                                        const u1* const runtime_invisible_annotations,
3673                                                        int runtime_invisible_annotations_length,
3674                                                        TRAPS) {
3675   AnnotationArray* annotations = NULL;
3676   if (runtime_visible_annotations != NULL ||
3677       runtime_invisible_annotations != NULL) {
3678     annotations = MetadataFactory::new_array<u1>(_loader_data,
3679                                           runtime_visible_annotations_length +
3680                                           runtime_invisible_annotations_length,
3681                                           CHECK_(annotations));
3682     if (runtime_visible_annotations != NULL) {
3683       for (int i = 0; i < runtime_visible_annotations_length; i++) {
3684         annotations->at_put(i, runtime_visible_annotations[i]);
3685       }
3686     }
3687     if (runtime_invisible_annotations != NULL) {
3688       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3689         int append = runtime_visible_annotations_length+i;
3690         annotations->at_put(append, runtime_invisible_annotations[i]);
3691       }
3692     }
3693   }
3694   return annotations;
3695 }
3696 
3697 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3698                                                         const int super_class_index,
3699                                                         const bool need_verify,
3700                                                         TRAPS) {
3701   assert(cp != NULL, "invariant");
3702   const InstanceKlass* super_klass = NULL;
3703 
3704   if (super_class_index == 0) {
3705     check_property(_class_name == vmSymbols::java_lang_Object(),
3706                    "Invalid superclass index %u in class file %s",
3707                    super_class_index,
3708                    CHECK_NULL);
3709   } else {
3710     check_property(valid_klass_reference_at(super_class_index),
3711                    "Invalid superclass index %u in class file %s",
3712                    super_class_index,
3713                    CHECK_NULL);
3714     // The class name should be legal because it is checked when parsing constant pool.
3715     // However, make sure it is not an array type.
3716     bool is_array = false;
3717     if (cp->tag_at(super_class_index).is_klass()) {
3718       super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3719       if (need_verify)
3720         is_array = super_klass->is_array_klass();
3721     } else if (need_verify) {
3722       is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3723     }
3724     if (need_verify) {
3725       guarantee_property(!is_array,
3726                         "Bad superclass name in class file %s", CHECK_NULL);
3727     }
3728   }
3729   return super_klass;
3730 }
3731 
3732 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3733                                           unsigned int nonstatic_oop_map_count,
3734                                           int first_nonstatic_oop_offset) {
3735 
3736   unsigned int map_count =
3737     NULL == super ? 0 : super->nonstatic_oop_map_count();
3738   if (nonstatic_oop_map_count > 0) {
3739     // We have oops to add to map
3740     if (map_count == 0) {
3741       map_count = nonstatic_oop_map_count;
3742     }
3743     else {
3744       // Check whether we should add a new map block or whether the last one can
3745       // be extended
3746       const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3747       const OopMapBlock* const last_map = first_map + map_count - 1;
3748 
3749       const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3750       if (next_offset == first_nonstatic_oop_offset) {
3751         // There is no gap bettwen superklass's last oop field and first
3752         // local oop field, merge maps.
3753         nonstatic_oop_map_count -= 1;
3754       }
3755       else {
3756         // Superklass didn't end with a oop field, add extra maps
3757         assert(next_offset < first_nonstatic_oop_offset, "just checking");
3758       }
3759       map_count += nonstatic_oop_map_count;
3760     }
3761   }
3762   return map_count;
3763 }
3764 
3765 #ifndef PRODUCT
3766 static void print_field_layout(const Symbol* name,
3767                                Array<u2>* fields,
3768                                const constantPoolHandle& cp,
3769                                int instance_size,
3770                                int instance_fields_start,
3771                                int instance_fields_end,
3772                                int static_fields_end) {
3773 
3774   assert(name != NULL, "invariant");
3775 
3776   tty->print("%s: field layout\n", name->as_klass_external_name());
3777   tty->print("  @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3778   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3779     if (!fs.access_flags().is_static()) {
3780       tty->print("  @%3d \"%s\" %s\n",
3781         fs.offset(),
3782         fs.name()->as_klass_external_name(),
3783         fs.signature()->as_klass_external_name());
3784     }
3785   }
3786   tty->print("  @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3787   tty->print("  @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3788   tty->print("  @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3789   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3790     if (fs.access_flags().is_static()) {
3791       tty->print("  @%3d \"%s\" %s\n",
3792         fs.offset(),
3793         fs.name()->as_klass_external_name(),
3794         fs.signature()->as_klass_external_name());
3795     }
3796   }
3797   tty->print("  @%3d %s\n", static_fields_end, "--- static fields end ---");
3798   tty->print("\n");
3799 }
3800 #endif
3801 
3802 // Values needed for oopmap and InstanceKlass creation
3803 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3804  public:
3805   int*          nonstatic_oop_offsets;
3806   unsigned int* nonstatic_oop_counts;
3807   unsigned int  nonstatic_oop_map_count;
3808   unsigned int  total_oop_map_count;
3809   int           instance_size;
3810   int           nonstatic_field_size;
3811   int           static_field_size;
3812   bool          has_nonstatic_fields;
3813 };
3814 
3815 // Layout fields and fill in FieldLayoutInfo.  Could use more refactoring!
3816 void ClassFileParser::layout_fields(ConstantPool* cp,
3817                                     const FieldAllocationCount* fac,
3818                                     const ClassAnnotationCollector* parsed_annotations,
3819                                     FieldLayoutInfo* info,
3820                                     TRAPS) {
3821 
3822   assert(cp != NULL, "invariant");
3823 
3824   // Field size and offset computation
3825   int nonstatic_field_size = _super_klass == NULL ? 0 :
3826                                _super_klass->nonstatic_field_size();
3827 
3828   // Count the contended fields by type.
3829   //
3830   // We ignore static fields, because @Contended is not supported for them.
3831   // The layout code below will also ignore the static fields.
3832   int nonstatic_contended_count = 0;
3833   FieldAllocationCount fac_contended;
3834   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3835     FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3836     if (fs.is_contended()) {
3837       fac_contended.count[atype]++;
3838       if (!fs.access_flags().is_static()) {
3839         nonstatic_contended_count++;
3840       }
3841     }
3842   }
3843 
3844 
3845   // Calculate the starting byte offsets
3846   int next_static_oop_offset    = InstanceMirrorKlass::offset_of_static_fields();
3847   int next_static_double_offset = next_static_oop_offset +
3848                                       ((fac->count[STATIC_OOP]) * heapOopSize);
3849   if (fac->count[STATIC_DOUBLE]) {
3850     next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3851   }
3852 
3853   int next_static_word_offset   = next_static_double_offset +
3854                                     ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3855   int next_static_short_offset  = next_static_word_offset +
3856                                     ((fac->count[STATIC_WORD]) * BytesPerInt);
3857   int next_static_byte_offset   = next_static_short_offset +
3858                                   ((fac->count[STATIC_SHORT]) * BytesPerShort);
3859 
3860   int nonstatic_fields_start  = instanceOopDesc::base_offset_in_bytes() +
3861                                 nonstatic_field_size * heapOopSize;
3862 
3863   int next_nonstatic_field_offset = nonstatic_fields_start;
3864 
3865   const bool is_contended_class     = parsed_annotations->is_contended();
3866 
3867   // Class is contended, pad before all the fields
3868   if (is_contended_class) {
3869     next_nonstatic_field_offset += ContendedPaddingWidth;
3870   }
3871 
3872   // Compute the non-contended fields count.
3873   // The packing code below relies on these counts to determine if some field
3874   // can be squeezed into the alignment gap. Contended fields are obviously
3875   // exempt from that.
3876   unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3877   unsigned int nonstatic_word_count   = fac->count[NONSTATIC_WORD]   - fac_contended.count[NONSTATIC_WORD];
3878   unsigned int nonstatic_short_count  = fac->count[NONSTATIC_SHORT]  - fac_contended.count[NONSTATIC_SHORT];
3879   unsigned int nonstatic_byte_count   = fac->count[NONSTATIC_BYTE]   - fac_contended.count[NONSTATIC_BYTE];
3880   unsigned int nonstatic_oop_count    = fac->count[NONSTATIC_OOP]    - fac_contended.count[NONSTATIC_OOP];
3881 
3882   // Total non-static fields count, including every contended field
3883   unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3884                                         fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3885                                         fac->count[NONSTATIC_OOP];
3886 
3887   const bool super_has_nonstatic_fields =
3888           (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3889   const bool has_nonstatic_fields =
3890     super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3891 
3892 
3893   // Prepare list of oops for oop map generation.
3894   //
3895   // "offset" and "count" lists are describing the set of contiguous oop
3896   // regions. offset[i] is the start of the i-th region, which then has
3897   // count[i] oops following. Before we know how many regions are required,
3898   // we pessimistically allocate the maps to fit all the oops into the
3899   // distinct regions.
3900   //
3901   // TODO: We add +1 to always allocate non-zero resource arrays; we need
3902   // to figure out if we still need to do this.
3903   unsigned int nonstatic_oop_map_count = 0;
3904   unsigned int max_nonstatic_oop_maps  = fac->count[NONSTATIC_OOP] + 1;
3905 
3906   int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3907             THREAD, int, max_nonstatic_oop_maps);
3908   unsigned int* const nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
3909             THREAD, unsigned int, max_nonstatic_oop_maps);
3910 
3911   int first_nonstatic_oop_offset = 0; // will be set for first oop field
3912 
3913   bool compact_fields   = CompactFields;
3914   int allocation_style = FieldsAllocationStyle;
3915   if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3916     assert(false, "0 <= FieldsAllocationStyle <= 2");
3917     allocation_style = 1; // Optimistic
3918   }
3919 
3920   // The next classes have predefined hard-coded fields offsets
3921   // (see in JavaClasses::compute_hard_coded_offsets()).
3922   // Use default fields allocation order for them.
3923   if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3924       (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3925        _class_name == vmSymbols::java_lang_Class() ||
3926        _class_name == vmSymbols::java_lang_ClassLoader() ||
3927        _class_name == vmSymbols::java_lang_ref_Reference() ||
3928        _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3929        _class_name == vmSymbols::java_lang_StackTraceElement() ||
3930        _class_name == vmSymbols::java_lang_String() ||
3931        _class_name == vmSymbols::java_lang_Throwable() ||
3932        _class_name == vmSymbols::java_lang_Boolean() ||
3933        _class_name == vmSymbols::java_lang_Character() ||
3934        _class_name == vmSymbols::java_lang_Float() ||
3935        _class_name == vmSymbols::java_lang_Double() ||
3936        _class_name == vmSymbols::java_lang_Byte() ||
3937        _class_name == vmSymbols::java_lang_Short() ||
3938        _class_name == vmSymbols::java_lang_Integer() ||
3939        _class_name == vmSymbols::java_lang_Long())) {
3940     allocation_style = 0;     // Allocate oops first
3941     compact_fields   = false; // Don't compact fields
3942   }
3943 
3944   int next_nonstatic_oop_offset = 0;
3945   int next_nonstatic_double_offset = 0;
3946 
3947   // Rearrange fields for a given allocation style
3948   if( allocation_style == 0 ) {
3949     // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3950     next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3951     next_nonstatic_double_offset = next_nonstatic_oop_offset +
3952                                     (nonstatic_oop_count * heapOopSize);
3953   } else if( allocation_style == 1 ) {
3954     // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3955     next_nonstatic_double_offset = next_nonstatic_field_offset;
3956   } else if( allocation_style == 2 ) {
3957     // Fields allocation: oops fields in super and sub classes are together.
3958     if( nonstatic_field_size > 0 && _super_klass != NULL &&
3959         _super_klass->nonstatic_oop_map_size() > 0 ) {
3960       const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3961       const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3962       const OopMapBlock* const last_map = first_map + map_count - 1;
3963       const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3964       if (next_offset == next_nonstatic_field_offset) {
3965         allocation_style = 0;   // allocate oops first
3966         next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3967         next_nonstatic_double_offset = next_nonstatic_oop_offset +
3968                                        (nonstatic_oop_count * heapOopSize);
3969       }
3970     }
3971     if( allocation_style == 2 ) {
3972       allocation_style = 1;     // allocate oops last
3973       next_nonstatic_double_offset = next_nonstatic_field_offset;
3974     }
3975   } else {
3976     ShouldNotReachHere();
3977   }
3978 
3979   int nonstatic_oop_space_count   = 0;
3980   int nonstatic_word_space_count  = 0;
3981   int nonstatic_short_space_count = 0;
3982   int nonstatic_byte_space_count  = 0;
3983   int nonstatic_oop_space_offset = 0;
3984   int nonstatic_word_space_offset = 0;
3985   int nonstatic_short_space_offset = 0;
3986   int nonstatic_byte_space_offset = 0;
3987 
3988   // Try to squeeze some of the fields into the gaps due to
3989   // long/double alignment.
3990   if (nonstatic_double_count > 0) {
3991     int offset = next_nonstatic_double_offset;
3992     next_nonstatic_double_offset = align_up(offset, BytesPerLong);
3993     if (compact_fields && offset != next_nonstatic_double_offset) {
3994       // Allocate available fields into the gap before double field.
3995       int length = next_nonstatic_double_offset - offset;
3996       assert(length == BytesPerInt, "");
3997       nonstatic_word_space_offset = offset;
3998       if (nonstatic_word_count > 0) {
3999         nonstatic_word_count      -= 1;
4000         nonstatic_word_space_count = 1; // Only one will fit
4001         length -= BytesPerInt;
4002         offset += BytesPerInt;
4003       }
4004       nonstatic_short_space_offset = offset;
4005       while (length >= BytesPerShort && nonstatic_short_count > 0) {
4006         nonstatic_short_count       -= 1;
4007         nonstatic_short_space_count += 1;
4008         length -= BytesPerShort;
4009         offset += BytesPerShort;
4010       }
4011       nonstatic_byte_space_offset = offset;
4012       while (length > 0 && nonstatic_byte_count > 0) {
4013         nonstatic_byte_count       -= 1;
4014         nonstatic_byte_space_count += 1;
4015         length -= 1;
4016       }
4017       // Allocate oop field in the gap if there are no other fields for that.
4018       nonstatic_oop_space_offset = offset;
4019       if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4020           allocation_style != 0) { // when oop fields not first
4021         nonstatic_oop_count      -= 1;
4022         nonstatic_oop_space_count = 1; // Only one will fit
4023         length -= heapOopSize;
4024         offset += heapOopSize;
4025       }
4026     }
4027   }
4028 
4029   int next_nonstatic_word_offset = next_nonstatic_double_offset +
4030                                      (nonstatic_double_count * BytesPerLong);
4031   int next_nonstatic_short_offset = next_nonstatic_word_offset +
4032                                       (nonstatic_word_count * BytesPerInt);
4033   int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4034                                      (nonstatic_short_count * BytesPerShort);
4035   int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4036                                        nonstatic_byte_count;
4037 
4038   // let oops jump before padding with this allocation style
4039   if( allocation_style == 1 ) {
4040     next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4041     if( nonstatic_oop_count > 0 ) {
4042       next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4043     }
4044     next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4045   }
4046 
4047   // Iterate over fields again and compute correct offsets.
4048   // The field allocation type was temporarily stored in the offset slot.
4049   // oop fields are located before non-oop fields (static and non-static).
4050   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4051 
4052     // skip already laid out fields
4053     if (fs.is_offset_set()) continue;
4054 
4055     // contended instance fields are handled below
4056     if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4057 
4058     int real_offset = 0;
4059     const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4060 
4061     // pack the rest of the fields
4062     switch (atype) {
4063       case STATIC_OOP:
4064         real_offset = next_static_oop_offset;
4065         next_static_oop_offset += heapOopSize;
4066         break;
4067       case STATIC_BYTE:
4068         real_offset = next_static_byte_offset;
4069         next_static_byte_offset += 1;
4070         break;
4071       case STATIC_SHORT:
4072         real_offset = next_static_short_offset;
4073         next_static_short_offset += BytesPerShort;
4074         break;
4075       case STATIC_WORD:
4076         real_offset = next_static_word_offset;
4077         next_static_word_offset += BytesPerInt;
4078         break;
4079       case STATIC_DOUBLE:
4080         real_offset = next_static_double_offset;
4081         next_static_double_offset += BytesPerLong;
4082         break;
4083       case NONSTATIC_OOP:
4084         if( nonstatic_oop_space_count > 0 ) {
4085           real_offset = nonstatic_oop_space_offset;
4086           nonstatic_oop_space_offset += heapOopSize;
4087           nonstatic_oop_space_count  -= 1;
4088         } else {
4089           real_offset = next_nonstatic_oop_offset;
4090           next_nonstatic_oop_offset += heapOopSize;
4091         }
4092 
4093         // Record this oop in the oop maps
4094         if( nonstatic_oop_map_count > 0 &&
4095             nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4096             real_offset -
4097             int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4098             heapOopSize ) {
4099           // This oop is adjacent to the previous one, add to current oop map
4100           assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4101           nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4102         } else {
4103           // This oop is not adjacent to the previous one, create new oop map
4104           assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4105           nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4106           nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4107           nonstatic_oop_map_count += 1;
4108           if( first_nonstatic_oop_offset == 0 ) { // Undefined
4109             first_nonstatic_oop_offset = real_offset;
4110           }
4111         }
4112         break;
4113       case NONSTATIC_BYTE:
4114         if( nonstatic_byte_space_count > 0 ) {
4115           real_offset = nonstatic_byte_space_offset;
4116           nonstatic_byte_space_offset += 1;
4117           nonstatic_byte_space_count  -= 1;
4118         } else {
4119           real_offset = next_nonstatic_byte_offset;
4120           next_nonstatic_byte_offset += 1;
4121         }
4122         break;
4123       case NONSTATIC_SHORT:
4124         if( nonstatic_short_space_count > 0 ) {
4125           real_offset = nonstatic_short_space_offset;
4126           nonstatic_short_space_offset += BytesPerShort;
4127           nonstatic_short_space_count  -= 1;
4128         } else {
4129           real_offset = next_nonstatic_short_offset;
4130           next_nonstatic_short_offset += BytesPerShort;
4131         }
4132         break;
4133       case NONSTATIC_WORD:
4134         if( nonstatic_word_space_count > 0 ) {
4135           real_offset = nonstatic_word_space_offset;
4136           nonstatic_word_space_offset += BytesPerInt;
4137           nonstatic_word_space_count  -= 1;
4138         } else {
4139           real_offset = next_nonstatic_word_offset;
4140           next_nonstatic_word_offset += BytesPerInt;
4141         }
4142         break;
4143       case NONSTATIC_DOUBLE:
4144         real_offset = next_nonstatic_double_offset;
4145         next_nonstatic_double_offset += BytesPerLong;
4146         break;
4147       default:
4148         ShouldNotReachHere();
4149     }
4150     fs.set_offset(real_offset);
4151   }
4152 
4153 
4154   // Handle the contended cases.
4155   //
4156   // Each contended field should not intersect the cache line with another contended field.
4157   // In the absence of alignment information, we end up with pessimistically separating
4158   // the fields with full-width padding.
4159   //
4160   // Additionally, this should not break alignment for the fields, so we round the alignment up
4161   // for each field.
4162   if (nonstatic_contended_count > 0) {
4163 
4164     // if there is at least one contended field, we need to have pre-padding for them
4165     next_nonstatic_padded_offset += ContendedPaddingWidth;
4166 
4167     // collect all contended groups
4168     ResourceBitMap bm(cp->size());
4169     for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4170       // skip already laid out fields
4171       if (fs.is_offset_set()) continue;
4172 
4173       if (fs.is_contended()) {
4174         bm.set_bit(fs.contended_group());
4175       }
4176     }
4177 
4178     int current_group = -1;
4179     while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4180 
4181       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4182 
4183         // skip already laid out fields
4184         if (fs.is_offset_set()) continue;
4185 
4186         // skip non-contended fields and fields from different group
4187         if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4188 
4189         // handle statics below
4190         if (fs.access_flags().is_static()) continue;
4191 
4192         int real_offset = 0;
4193         FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4194 
4195         switch (atype) {
4196           case NONSTATIC_BYTE:
4197             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4198             real_offset = next_nonstatic_padded_offset;
4199             next_nonstatic_padded_offset += 1;
4200             break;
4201 
4202           case NONSTATIC_SHORT:
4203             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4204             real_offset = next_nonstatic_padded_offset;
4205             next_nonstatic_padded_offset += BytesPerShort;
4206             break;
4207 
4208           case NONSTATIC_WORD:
4209             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4210             real_offset = next_nonstatic_padded_offset;
4211             next_nonstatic_padded_offset += BytesPerInt;
4212             break;
4213 
4214           case NONSTATIC_DOUBLE:
4215             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4216             real_offset = next_nonstatic_padded_offset;
4217             next_nonstatic_padded_offset += BytesPerLong;
4218             break;
4219 
4220           case NONSTATIC_OOP:
4221             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4222             real_offset = next_nonstatic_padded_offset;
4223             next_nonstatic_padded_offset += heapOopSize;
4224 
4225             // Record this oop in the oop maps
4226             if( nonstatic_oop_map_count > 0 &&
4227                 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4228                 real_offset -
4229                 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4230                 heapOopSize ) {
4231               // This oop is adjacent to the previous one, add to current oop map
4232               assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4233               nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4234             } else {
4235               // This oop is not adjacent to the previous one, create new oop map
4236               assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4237               nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4238               nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4239               nonstatic_oop_map_count += 1;
4240               if( first_nonstatic_oop_offset == 0 ) { // Undefined
4241                 first_nonstatic_oop_offset = real_offset;
4242               }
4243             }
4244             break;
4245 
4246           default:
4247             ShouldNotReachHere();
4248         }
4249 
4250         if (fs.contended_group() == 0) {
4251           // Contended group defines the equivalence class over the fields:
4252           // the fields within the same contended group are not inter-padded.
4253           // The only exception is default group, which does not incur the
4254           // equivalence, and so requires intra-padding.
4255           next_nonstatic_padded_offset += ContendedPaddingWidth;
4256         }
4257 
4258         fs.set_offset(real_offset);
4259       } // for
4260 
4261       // Start laying out the next group.
4262       // Note that this will effectively pad the last group in the back;
4263       // this is expected to alleviate memory contention effects for
4264       // subclass fields and/or adjacent object.
4265       // If this was the default group, the padding is already in place.
4266       if (current_group != 0) {
4267         next_nonstatic_padded_offset += ContendedPaddingWidth;
4268       }
4269     }
4270 
4271     // handle static fields
4272   }
4273 
4274   // Entire class is contended, pad in the back.
4275   // This helps to alleviate memory contention effects for subclass fields
4276   // and/or adjacent object.
4277   if (is_contended_class) {
4278     next_nonstatic_padded_offset += ContendedPaddingWidth;
4279   }
4280 
4281   int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4282 
4283   int nonstatic_fields_end      = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4284   int instance_end              = align_up(notaligned_nonstatic_fields_end, wordSize);
4285   int static_fields_end         = align_up(next_static_byte_offset, wordSize);
4286 
4287   int static_field_size         = (static_fields_end -
4288                                    InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4289   nonstatic_field_size          = nonstatic_field_size +
4290                                   (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4291 
4292   int instance_size             = align_object_size(instance_end / wordSize);
4293 
4294   assert(instance_size == align_object_size(align_up(
4295          (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4296           wordSize) / wordSize), "consistent layout helper value");
4297 
4298   // Invariant: nonstatic_field end/start should only change if there are
4299   // nonstatic fields in the class, or if the class is contended. We compare
4300   // against the non-aligned value, so that end alignment will not fail the
4301   // assert without actually having the fields.
4302   assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4303          is_contended_class ||
4304          (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4305 
4306   // Number of non-static oop map blocks allocated at end of klass.
4307   const unsigned int total_oop_map_count =
4308     compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4309                           first_nonstatic_oop_offset);
4310 
4311 #ifndef PRODUCT
4312   if (PrintFieldLayout) {
4313     print_field_layout(_class_name,
4314           _fields,
4315           cp,
4316           instance_size,
4317           nonstatic_fields_start,
4318           nonstatic_fields_end,
4319           static_fields_end);
4320   }
4321 
4322 #endif
4323   // Pass back information needed for InstanceKlass creation
4324   info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4325   info->nonstatic_oop_counts = nonstatic_oop_counts;
4326   info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4327   info->total_oop_map_count = total_oop_map_count;
4328   info->instance_size = instance_size;
4329   info->static_field_size = static_field_size;
4330   info->nonstatic_field_size = nonstatic_field_size;
4331   info->has_nonstatic_fields = has_nonstatic_fields;
4332 }
4333 
4334 static void fill_oop_maps(const InstanceKlass* k,
4335                           unsigned int nonstatic_oop_map_count,
4336                           const int* nonstatic_oop_offsets,
4337                           const unsigned int* nonstatic_oop_counts) {
4338 
4339   assert(k != NULL, "invariant");
4340 
4341   OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4342   const InstanceKlass* const super = k->superklass();
4343   const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4344   if (super_count > 0) {
4345     // Copy maps from superklass
4346     OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4347     for (unsigned int i = 0; i < super_count; ++i) {
4348       *this_oop_map++ = *super_oop_map++;
4349     }
4350   }
4351 
4352   if (nonstatic_oop_map_count > 0) {
4353     if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4354       // The counts differ because there is no gap between superklass's last oop
4355       // field and the first local oop field.  Extend the last oop map copied
4356       // from the superklass instead of creating new one.
4357       nonstatic_oop_map_count--;
4358       nonstatic_oop_offsets++;
4359       this_oop_map--;
4360       this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4361       this_oop_map++;
4362     }
4363 
4364     // Add new map blocks, fill them
4365     while (nonstatic_oop_map_count-- > 0) {
4366       this_oop_map->set_offset(*nonstatic_oop_offsets++);
4367       this_oop_map->set_count(*nonstatic_oop_counts++);
4368       this_oop_map++;
4369     }
4370     assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4371            this_oop_map, "sanity");
4372   }
4373 }
4374 
4375 
4376 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4377   assert(ik != NULL, "invariant");
4378 
4379   const Klass* const super = ik->super();
4380 
4381   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4382   // in which case we don't have to register objects as finalizable
4383   if (!_has_empty_finalizer) {
4384     if (_has_finalizer ||
4385         (super != NULL && super->has_finalizer())) {
4386       ik->set_has_finalizer();
4387     }
4388   }
4389 
4390 #ifdef ASSERT
4391   bool f = false;
4392   const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4393                                            vmSymbols::void_method_signature());
4394   if (m != NULL && !m->is_empty_method()) {
4395       f = true;
4396   }
4397 
4398   // Spec doesn't prevent agent from redefinition of empty finalizer.
4399   // Despite the fact that it's generally bad idea and redefined finalizer
4400   // will not work as expected we shouldn't abort vm in this case
4401   if (!ik->has_redefined_this_or_super()) {
4402     assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4403   }
4404 #endif
4405 
4406   // Check if this klass supports the java.lang.Cloneable interface
4407   if (SystemDictionary::Cloneable_klass_loaded()) {
4408     if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4409       ik->set_is_cloneable();
4410     }
4411   }
4412 
4413   // Check if this klass has a vanilla default constructor
4414   if (super == NULL) {
4415     // java.lang.Object has empty default constructor
4416     ik->set_has_vanilla_constructor();
4417   } else {
4418     if (super->has_vanilla_constructor() &&
4419         _has_vanilla_constructor) {
4420       ik->set_has_vanilla_constructor();
4421     }
4422 #ifdef ASSERT
4423     bool v = false;
4424     if (super->has_vanilla_constructor()) {
4425       const Method* const constructor =
4426         ik->find_method(vmSymbols::object_initializer_name(),
4427                        vmSymbols::void_method_signature());
4428       if (constructor != NULL && constructor->is_vanilla_constructor()) {
4429         v = true;
4430       }
4431     }
4432     assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4433 #endif
4434   }
4435 
4436   // If it cannot be fast-path allocated, set a bit in the layout helper.
4437   // See documentation of InstanceKlass::can_be_fastpath_allocated().
4438   assert(ik->size_helper() > 0, "layout_helper is initialized");
4439   if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4440       || ik->is_abstract() || ik->is_interface()
4441       || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4442       || ik->size_helper() >= FastAllocateSizeLimit) {
4443     // Forbid fast-path allocation.
4444     const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4445     ik->set_layout_helper(lh);
4446   }
4447 }
4448 
4449 // utility methods for appending an array with check for duplicates
4450 
4451 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4452                               const Array<InstanceKlass*>* const ifs) {
4453   // iterate over new interfaces
4454   for (int i = 0; i < ifs->length(); i++) {
4455     InstanceKlass* const e = ifs->at(i);
4456     assert(e->is_klass() && e->is_interface(), "just checking");
4457     // add new interface
4458     result->append_if_missing(e);
4459   }
4460 }
4461 
4462 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4463                                                             Array<InstanceKlass*>* local_ifs,
4464                                                             ClassLoaderData* loader_data,
4465                                                             TRAPS) {
4466   assert(local_ifs != NULL, "invariant");
4467   assert(loader_data != NULL, "invariant");
4468 
4469   // Compute maximum size for transitive interfaces
4470   int max_transitive_size = 0;
4471   int super_size = 0;
4472   // Add superclass transitive interfaces size
4473   if (super != NULL) {
4474     super_size = super->transitive_interfaces()->length();
4475     max_transitive_size += super_size;
4476   }
4477   // Add local interfaces' super interfaces
4478   const int local_size = local_ifs->length();
4479   for (int i = 0; i < local_size; i++) {
4480     InstanceKlass* const l = local_ifs->at(i);
4481     max_transitive_size += l->transitive_interfaces()->length();
4482   }
4483   // Finally add local interfaces
4484   max_transitive_size += local_size;
4485   // Construct array
4486   if (max_transitive_size == 0) {
4487     // no interfaces, use canonicalized array
4488     return Universe::the_empty_instance_klass_array();
4489   } else if (max_transitive_size == super_size) {
4490     // no new local interfaces added, share superklass' transitive interface array
4491     return super->transitive_interfaces();
4492   } else if (max_transitive_size == local_size) {
4493     // only local interfaces added, share local interface array
4494     return local_ifs;
4495   } else {
4496     ResourceMark rm;
4497     GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4498 
4499     // Copy down from superclass
4500     if (super != NULL) {
4501       append_interfaces(result, super->transitive_interfaces());
4502     }
4503 
4504     // Copy down from local interfaces' superinterfaces
4505     for (int i = 0; i < local_size; i++) {
4506       InstanceKlass* const l = local_ifs->at(i);
4507       append_interfaces(result, l->transitive_interfaces());
4508     }
4509     // Finally add local interfaces
4510     append_interfaces(result, local_ifs);
4511 
4512     // length will be less than the max_transitive_size if duplicates were removed
4513     const int length = result->length();
4514     assert(length <= max_transitive_size, "just checking");
4515     Array<InstanceKlass*>* const new_result =
4516       MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4517     for (int i = 0; i < length; i++) {
4518       InstanceKlass* const e = result->at(i);
4519       assert(e != NULL, "just checking");
4520       new_result->at_put(i, e);
4521     }
4522     return new_result;
4523   }
4524 }
4525 
4526 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4527   assert(this_klass != NULL, "invariant");
4528   const Klass* const super = this_klass->super();
4529   if (super != NULL) {
4530 
4531     // If the loader is not the boot loader then throw an exception if its
4532     // superclass is in package jdk.internal.reflect and its loader is not a
4533     // special reflection class loader
4534     if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4535       assert(super->is_instance_klass(), "super is not instance klass");
4536       PackageEntry* super_package = super->package();
4537       if (super_package != NULL &&
4538           super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4539           !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4540         ResourceMark rm(THREAD);
4541         Exceptions::fthrow(
4542           THREAD_AND_LOCATION,
4543           vmSymbols::java_lang_IllegalAccessError(),
4544           "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4545           this_klass->external_name(),
4546           this_klass->class_loader_data()->loader_name_and_id(),
4547           super->external_name());
4548         return;
4549       }
4550     }
4551 
4552     Reflection::VerifyClassAccessResults vca_result =
4553       Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4554     if (vca_result != Reflection::ACCESS_OK) {
4555       ResourceMark rm(THREAD);
4556       char* msg = Reflection::verify_class_access_msg(this_klass,
4557                                                       InstanceKlass::cast(super),
4558                                                       vca_result);
4559       if (msg == NULL) {
4560         bool same_module = (this_klass->module() == super->module());
4561         Exceptions::fthrow(
4562           THREAD_AND_LOCATION,
4563           vmSymbols::java_lang_IllegalAccessError(),
4564           "class %s cannot access its %ssuperclass %s (%s%s%s)",
4565           this_klass->external_name(),
4566           super->is_abstract() ? "abstract " : "",
4567           super->external_name(),
4568           (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4569           (same_module) ? "" : "; ",
4570           (same_module) ? "" : super->class_in_module_of_loader());
4571       } else {
4572         // Add additional message content.
4573         Exceptions::fthrow(
4574           THREAD_AND_LOCATION,
4575           vmSymbols::java_lang_IllegalAccessError(),
4576           "superclass access check failed: %s",
4577           msg);
4578       }
4579     }
4580   }
4581 }
4582 
4583 
4584 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4585   assert(this_klass != NULL, "invariant");
4586   const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4587   const int lng = local_interfaces->length();
4588   for (int i = lng - 1; i >= 0; i--) {
4589     InstanceKlass* const k = local_interfaces->at(i);
4590     assert (k != NULL && k->is_interface(), "invalid interface");
4591     Reflection::VerifyClassAccessResults vca_result =
4592       Reflection::verify_class_access(this_klass, k, false);
4593     if (vca_result != Reflection::ACCESS_OK) {
4594       ResourceMark rm(THREAD);
4595       char* msg = Reflection::verify_class_access_msg(this_klass,
4596                                                       k,
4597                                                       vca_result);
4598       if (msg == NULL) {
4599         bool same_module = (this_klass->module() == k->module());
4600         Exceptions::fthrow(
4601           THREAD_AND_LOCATION,
4602           vmSymbols::java_lang_IllegalAccessError(),
4603           "class %s cannot access its superinterface %s (%s%s%s)",
4604           this_klass->external_name(),
4605           k->external_name(),
4606           (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4607           (same_module) ? "" : "; ",
4608           (same_module) ? "" : k->class_in_module_of_loader());
4609       } else {
4610         // Add additional message content.
4611         Exceptions::fthrow(
4612           THREAD_AND_LOCATION,
4613           vmSymbols::java_lang_IllegalAccessError(),
4614           "superinterface check failed: %s",
4615           msg);
4616       }
4617     }
4618   }
4619 }
4620 
4621 
4622 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4623   assert(this_klass != NULL, "invariant");
4624   const Array<Method*>* const methods = this_klass->methods();
4625   const int num_methods = methods->length();
4626 
4627   // go thru each method and check if it overrides a final method
4628   for (int index = 0; index < num_methods; index++) {
4629     const Method* const m = methods->at(index);
4630 
4631     // skip private, static, and <init> methods
4632     if ((!m->is_private() && !m->is_static()) &&
4633         (m->name() != vmSymbols::object_initializer_name())) {
4634 
4635       const Symbol* const name = m->name();
4636       const Symbol* const signature = m->signature();
4637       const Klass* k = this_klass->super();
4638       const Method* super_m = NULL;
4639       while (k != NULL) {
4640         // skip supers that don't have final methods.
4641         if (k->has_final_method()) {
4642           // lookup a matching method in the super class hierarchy
4643           super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4644           if (super_m == NULL) {
4645             break; // didn't find any match; get out
4646           }
4647 
4648           if (super_m->is_final() && !super_m->is_static() &&
4649               !super_m->access_flags().is_private()) {
4650             // matching method in super is final, and not static or private
4651             bool can_access = Reflection::verify_member_access(this_klass,
4652                                                                super_m->method_holder(),
4653                                                                super_m->method_holder(),
4654                                                                super_m->access_flags(),
4655                                                               false, false, CHECK);
4656             if (can_access) {
4657               // this class can access super final method and therefore override
4658               ResourceMark rm(THREAD);
4659               Exceptions::fthrow(THREAD_AND_LOCATION,
4660                                  vmSymbols::java_lang_VerifyError(),
4661                                  "class %s overrides final method %s.%s%s",
4662                                  this_klass->external_name(),
4663                                  super_m->method_holder()->external_name(),
4664                                  name->as_C_string(),
4665                                  signature->as_C_string()
4666                                  );
4667               return;
4668             }
4669           }
4670 
4671           // continue to look from super_m's holder's super.
4672           k = super_m->method_holder()->super();
4673           continue;
4674         }
4675 
4676         k = k->super();
4677       }
4678     }
4679   }
4680 }
4681 
4682 
4683 // assumes that this_klass is an interface
4684 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4685   assert(this_klass != NULL, "invariant");
4686   assert(this_klass->is_interface(), "not an interface");
4687   const Array<Method*>* methods = this_klass->methods();
4688   const int num_methods = methods->length();
4689 
4690   for (int index = 0; index < num_methods; index++) {
4691     const Method* const m = methods->at(index);
4692     // if m is static and not the init method, throw a verify error
4693     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4694       ResourceMark rm(THREAD);
4695       Exceptions::fthrow(
4696         THREAD_AND_LOCATION,
4697         vmSymbols::java_lang_VerifyError(),
4698         "Illegal static method %s in interface %s",
4699         m->name()->as_C_string(),
4700         this_klass->external_name()
4701       );
4702       return;
4703     }
4704   }
4705 }
4706 
4707 // utility methods for format checking
4708 
4709 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4710   const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4711   assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4712   if (is_module) {
4713     ResourceMark rm(THREAD);
4714     Exceptions::fthrow(
4715       THREAD_AND_LOCATION,
4716       vmSymbols::java_lang_NoClassDefFoundError(),
4717       "%s is not a class because access_flag ACC_MODULE is set",
4718       _class_name->as_C_string());
4719     return;
4720   }
4721 
4722   if (!_need_verify) { return; }
4723 
4724   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
4725   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
4726   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
4727   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
4728   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
4729   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4730   const bool major_gte_15  = _major_version >= JAVA_1_5_VERSION;
4731 
4732   if ((is_abstract && is_final) ||
4733       (is_interface && !is_abstract) ||
4734       (is_interface && major_gte_15 && (is_super || is_enum)) ||
4735       (!is_interface && major_gte_15 && is_annotation)) {
4736     ResourceMark rm(THREAD);
4737     Exceptions::fthrow(
4738       THREAD_AND_LOCATION,
4739       vmSymbols::java_lang_ClassFormatError(),
4740       "Illegal class modifiers in class %s: 0x%X",
4741       _class_name->as_C_string(), flags
4742     );
4743     return;
4744   }
4745 }
4746 
4747 static bool has_illegal_visibility(jint flags) {
4748   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4749   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4750   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4751 
4752   return ((is_public && is_protected) ||
4753           (is_public && is_private) ||
4754           (is_protected && is_private));
4755 }
4756 
4757 // A legal major_version.minor_version must be one of the following:
4758 //
4759 //  Major_version >= 45 and major_version < 56, any minor_version.
4760 //  Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4761 //  Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4762 //
4763 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4764   ResourceMark rm(THREAD);
4765   const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4766   if (major < JAVA_MIN_SUPPORTED_VERSION) {
4767     Exceptions::fthrow(
4768       THREAD_AND_LOCATION,
4769       vmSymbols::java_lang_UnsupportedClassVersionError(),
4770       "%s (class file version %u.%u) was compiled with an invalid major version",
4771       class_name->as_C_string(), major, minor);
4772     return;
4773   }
4774 
4775   if (major > max_version) {
4776     Exceptions::fthrow(
4777       THREAD_AND_LOCATION,
4778       vmSymbols::java_lang_UnsupportedClassVersionError(),
4779       "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4780       "this version of the Java Runtime only recognizes class file versions up to %u.0",
4781       class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4782     return;
4783   }
4784 
4785   if (major < JAVA_12_VERSION || minor == 0) {
4786     return;
4787   }
4788 
4789   if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4790     if (major != max_version) {
4791       Exceptions::fthrow(
4792         THREAD_AND_LOCATION,
4793         vmSymbols::java_lang_UnsupportedClassVersionError(),
4794         "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4795         "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4796         class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4797       return;
4798     }
4799 
4800     if (!Arguments::enable_preview()) {
4801       Exceptions::fthrow(
4802         THREAD_AND_LOCATION,
4803         vmSymbols::java_lang_UnsupportedClassVersionError(),
4804         "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4805         class_name->as_C_string(), major, minor);
4806       return;
4807     }
4808 
4809   } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4810     Exceptions::fthrow(
4811         THREAD_AND_LOCATION,
4812         vmSymbols::java_lang_UnsupportedClassVersionError(),
4813         "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4814         class_name->as_C_string(), major, minor);
4815   }
4816 }
4817 
4818 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4819                                                    bool is_interface,
4820                                                    TRAPS) const {
4821   if (!_need_verify) { return; }
4822 
4823   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4824   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4825   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4826   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
4827   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
4828   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
4829   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4830   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
4831   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4832 
4833   bool is_illegal = false;
4834 
4835   if (is_interface) {
4836     if (!is_public || !is_static || !is_final || is_private ||
4837         is_protected || is_volatile || is_transient ||
4838         (major_gte_15 && is_enum)) {
4839       is_illegal = true;
4840     }
4841   } else { // not interface
4842     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4843       is_illegal = true;
4844     }
4845   }
4846 
4847   if (is_illegal) {
4848     ResourceMark rm(THREAD);
4849     Exceptions::fthrow(
4850       THREAD_AND_LOCATION,
4851       vmSymbols::java_lang_ClassFormatError(),
4852       "Illegal field modifiers in class %s: 0x%X",
4853       _class_name->as_C_string(), flags);
4854     return;
4855   }
4856 }
4857 
4858 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4859                                                     bool is_interface,
4860                                                     const Symbol* name,
4861                                                     TRAPS) const {
4862   if (!_need_verify) { return; }
4863 
4864   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
4865   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
4866   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
4867   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
4868   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
4869   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
4870   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
4871   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
4872   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4873   const bool is_protected    = (flags & JVM_ACC_PROTECTED)    != 0;
4874   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
4875   const bool major_gte_8     = _major_version >= JAVA_8_VERSION;
4876   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
4877 
4878   bool is_illegal = false;
4879 
4880   if (is_interface) {
4881     if (major_gte_8) {
4882       // Class file version is JAVA_8_VERSION or later Methods of
4883       // interfaces may set any of the flags except ACC_PROTECTED,
4884       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4885       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4886       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4887           (is_native || is_protected || is_final || is_synchronized) ||
4888           // If a specific method of a class or interface has its
4889           // ACC_ABSTRACT flag set, it must not have any of its
4890           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4891           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
4892           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4893           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4894           (is_abstract && (is_private || is_static || is_strict))) {
4895         is_illegal = true;
4896       }
4897     } else if (major_gte_15) {
4898       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4899       if (!is_public || is_private || is_protected || is_static || is_final ||
4900           is_synchronized || is_native || !is_abstract || is_strict) {
4901         is_illegal = true;
4902       }
4903     } else {
4904       // Class file version is pre-JAVA_1_5_VERSION
4905       if (!is_public || is_static || is_final || is_native || !is_abstract) {
4906         is_illegal = true;
4907       }
4908     }
4909   } else { // not interface
4910     if (has_illegal_visibility(flags)) {
4911       is_illegal = true;
4912     } else {
4913       if (is_initializer) {
4914         if (is_static || is_final || is_synchronized || is_native ||
4915             is_abstract || (major_gte_15 && is_bridge)) {
4916           is_illegal = true;
4917         }
4918       } else { // not initializer
4919         if (is_abstract) {
4920           if ((is_final || is_native || is_private || is_static ||
4921               (major_gte_15 && (is_synchronized || is_strict)))) {
4922             is_illegal = true;
4923           }
4924         }
4925       }
4926     }
4927   }
4928 
4929   if (is_illegal) {
4930     ResourceMark rm(THREAD);
4931     Exceptions::fthrow(
4932       THREAD_AND_LOCATION,
4933       vmSymbols::java_lang_ClassFormatError(),
4934       "Method %s in class %s has illegal modifiers: 0x%X",
4935       name->as_C_string(), _class_name->as_C_string(), flags);
4936     return;
4937   }
4938 }
4939 
4940 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4941                                         int length,
4942                                         TRAPS) const {
4943   assert(_need_verify, "only called when _need_verify is true");
4944   if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4945     classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4946   }
4947 }
4948 
4949 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4950 // In class names, '/' separates unqualified names.  This is verified in this function also.
4951 // Method names also may not contain the characters '<' or '>', unless <init>
4952 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
4953 // method.  Because these names have been checked as special cases before
4954 // calling this method in verify_legal_method_name.
4955 //
4956 // This method is also called from the modular system APIs in modules.cpp
4957 // to verify the validity of module and package names.
4958 bool ClassFileParser::verify_unqualified_name(const char* name,
4959                                               unsigned int length,
4960                                               int type) {
4961   if (length == 0) return false;  // Must have at least one char.
4962   for (const char* p = name; p != name + length; p++) {
4963     switch(*p) {
4964       case '.':
4965       case ';':
4966       case '[':
4967         // do not permit '.', ';', or '['
4968         return false;
4969       case '/':
4970         // check for '//' or leading or trailing '/' which are not legal
4971         // unqualified name must not be empty
4972         if (type == ClassFileParser::LegalClass) {
4973           if (p == name || p+1 >= name+length || *(p+1) == '/') {
4974             return false;
4975           }
4976         } else {
4977           return false;   // do not permit '/' unless it's class name
4978         }
4979         break;
4980       case '<':
4981       case '>':
4982         // do not permit '<' or '>' in method names
4983         if (type == ClassFileParser::LegalMethod) {
4984           return false;
4985         }
4986     }
4987   }
4988   return true;
4989 }
4990 
4991 // Take pointer to a UTF8 byte string (not NUL-terminated).
4992 // Skip over the longest part of the string that could
4993 // be taken as a fieldname. Allow '/' if slash_ok is true.
4994 // Return a pointer to just past the fieldname.
4995 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4996 // being true, we saw consecutive slashes (meaning we were looking for a
4997 // qualified path but found something that was badly-formed).
4998 static const char* skip_over_field_name(const char* const name,
4999                                         bool slash_ok,
5000                                         unsigned int length) {
5001   const char* p;
5002   jboolean last_is_slash = false;
5003   jboolean not_first_ch = false;
5004 
5005   for (p = name; p != name + length; not_first_ch = true) {
5006     const char* old_p = p;
5007     jchar ch = *p;
5008     if (ch < 128) {
5009       p++;
5010       // quick check for ascii
5011       if ((ch >= 'a' && ch <= 'z') ||
5012         (ch >= 'A' && ch <= 'Z') ||
5013         (ch == '_' || ch == '$') ||
5014         (not_first_ch && ch >= '0' && ch <= '9')) {
5015         last_is_slash = false;
5016         continue;
5017       }
5018       if (slash_ok && ch == '/') {
5019         if (last_is_slash) {
5020           return NULL;  // Don't permit consecutive slashes
5021         }
5022         last_is_slash = true;
5023         continue;
5024       }
5025     }
5026     else {
5027       jint unicode_ch;
5028       char* tmp_p = UTF8::next_character(p, &unicode_ch);
5029       p = tmp_p;
5030       last_is_slash = false;
5031       // Check if ch is Java identifier start or is Java identifier part
5032       // 4672820: call java.lang.Character methods directly without generating separate tables.
5033       EXCEPTION_MARK;
5034       // return value
5035       JavaValue result(T_BOOLEAN);
5036       // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5037       JavaCallArguments args;
5038       args.push_int(unicode_ch);
5039 
5040       if (not_first_ch) {
5041         // public static boolean isJavaIdentifierPart(char ch);
5042         JavaCalls::call_static(&result,
5043           SystemDictionary::Character_klass(),
5044           vmSymbols::isJavaIdentifierPart_name(),
5045           vmSymbols::int_bool_signature(),
5046           &args,
5047           THREAD);
5048       } else {
5049         // public static boolean isJavaIdentifierStart(char ch);
5050         JavaCalls::call_static(&result,
5051           SystemDictionary::Character_klass(),
5052           vmSymbols::isJavaIdentifierStart_name(),
5053           vmSymbols::int_bool_signature(),
5054           &args,
5055           THREAD);
5056       }
5057       if (HAS_PENDING_EXCEPTION) {
5058         CLEAR_PENDING_EXCEPTION;
5059         return NULL;
5060       }
5061       if(result.get_jboolean()) {
5062         continue;
5063       }
5064     }
5065     return (not_first_ch) ? old_p : NULL;
5066   }
5067   return (not_first_ch) ? p : NULL;
5068 }
5069 
5070 // Take pointer to a UTF8 byte string (not NUL-terminated).
5071 // Skip over the longest part of the string that could
5072 // be taken as a field signature. Allow "void" if void_ok.
5073 // Return a pointer to just past the signature.
5074 // Return NULL if no legal signature is found.
5075 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5076                                                        bool void_ok,
5077                                                        unsigned int length,
5078                                                        TRAPS) const {
5079   unsigned int array_dim = 0;
5080   while (length > 0) {
5081     switch (signature[0]) {
5082     case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5083     case JVM_SIGNATURE_BOOLEAN:
5084     case JVM_SIGNATURE_BYTE:
5085     case JVM_SIGNATURE_CHAR:
5086     case JVM_SIGNATURE_SHORT:
5087     case JVM_SIGNATURE_INT:
5088     case JVM_SIGNATURE_FLOAT:
5089     case JVM_SIGNATURE_LONG:
5090     case JVM_SIGNATURE_DOUBLE:
5091       return signature + 1;
5092     case JVM_SIGNATURE_CLASS: {
5093       if (_major_version < JAVA_1_5_VERSION) {
5094         // Skip over the class name if one is there
5095         const char* const p = skip_over_field_name(signature + 1, true, --length);
5096 
5097         // The next character better be a semicolon
5098         if (p && (p - signature) > 1 && p[0] == ';') {
5099           return p + 1;
5100         }
5101       }
5102       else {
5103         // Skip leading 'L' and ignore first appearance of ';'
5104         signature++;
5105         const char* c = (const char*) memchr(signature, ';', length - 1);
5106         // Format check signature
5107         if (c != NULL) {
5108           int newlen = c - (char*) signature;
5109           bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5110           if (!legal) {
5111             classfile_parse_error("Class name is empty or contains illegal character "
5112                                   "in descriptor in class file %s",
5113                                   CHECK_0);
5114             return NULL;
5115           }
5116           return signature + newlen + 1;
5117         }
5118       }
5119       return NULL;
5120     }
5121     case JVM_SIGNATURE_ARRAY:
5122       array_dim++;
5123       if (array_dim > 255) {
5124         // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5125         classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5126       }
5127       // The rest of what's there better be a legal signature
5128       signature++;
5129       length--;
5130       void_ok = false;
5131       break;
5132     default:
5133       return NULL;
5134     }
5135   }
5136   return NULL;
5137 }
5138 
5139 // Checks if name is a legal class name.
5140 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5141   if (!_need_verify || _relax_verify) { return; }
5142 
5143   assert(name->refcount() > 0, "symbol must be kept alive");
5144   char* bytes = (char*)name->bytes();
5145   unsigned int length = name->utf8_length();
5146   bool legal = false;
5147 
5148   if (length > 0) {
5149     const char* p;
5150     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5151       p = skip_over_field_signature(bytes, false, length, CHECK);
5152       legal = (p != NULL) && ((p - bytes) == (int)length);
5153     } else if (_major_version < JAVA_1_5_VERSION) {
5154       if (bytes[0] != '<') {
5155         p = skip_over_field_name(bytes, true, length);
5156         legal = (p != NULL) && ((p - bytes) == (int)length);
5157       }
5158     } else {
5159       // 4900761: relax the constraints based on JSR202 spec
5160       // Class names may be drawn from the entire Unicode character set.
5161       // Identifiers between '/' must be unqualified names.
5162       // The utf8 string has been verified when parsing cpool entries.
5163       legal = verify_unqualified_name(bytes, length, LegalClass);
5164     }
5165   }
5166   if (!legal) {
5167     ResourceMark rm(THREAD);
5168     assert(_class_name != NULL, "invariant");
5169     Exceptions::fthrow(
5170       THREAD_AND_LOCATION,
5171       vmSymbols::java_lang_ClassFormatError(),
5172       "Illegal class name \"%.*s\" in class file %s", length, bytes,
5173       _class_name->as_C_string()
5174     );
5175     return;
5176   }
5177 }
5178 
5179 // Checks if name is a legal field name.
5180 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5181   if (!_need_verify || _relax_verify) { return; }
5182 
5183   char* bytes = (char*)name->bytes();
5184   unsigned int length = name->utf8_length();
5185   bool legal = false;
5186 
5187   if (length > 0) {
5188     if (_major_version < JAVA_1_5_VERSION) {
5189       if (bytes[0] != '<') {
5190         const char* p = skip_over_field_name(bytes, false, length);
5191         legal = (p != NULL) && ((p - bytes) == (int)length);
5192       }
5193     } else {
5194       // 4881221: relax the constraints based on JSR202 spec
5195       legal = verify_unqualified_name(bytes, length, LegalField);
5196     }
5197   }
5198 
5199   if (!legal) {
5200     ResourceMark rm(THREAD);
5201     assert(_class_name != NULL, "invariant");
5202     Exceptions::fthrow(
5203       THREAD_AND_LOCATION,
5204       vmSymbols::java_lang_ClassFormatError(),
5205       "Illegal field name \"%.*s\" in class %s", length, bytes,
5206       _class_name->as_C_string()
5207     );
5208     return;
5209   }
5210 }
5211 
5212 // Checks if name is a legal method name.
5213 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5214   if (!_need_verify || _relax_verify) { return; }
5215 
5216   assert(name != NULL, "method name is null");
5217   char* bytes = (char*)name->bytes();
5218   unsigned int length = name->utf8_length();
5219   bool legal = false;
5220 
5221   if (length > 0) {
5222     if (bytes[0] == '<') {
5223       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5224         legal = true;
5225       }
5226     } else if (_major_version < JAVA_1_5_VERSION) {
5227       const char* p;
5228       p = skip_over_field_name(bytes, false, length);
5229       legal = (p != NULL) && ((p - bytes) == (int)length);
5230     } else {
5231       // 4881221: relax the constraints based on JSR202 spec
5232       legal = verify_unqualified_name(bytes, length, LegalMethod);
5233     }
5234   }
5235 
5236   if (!legal) {
5237     ResourceMark rm(THREAD);
5238     assert(_class_name != NULL, "invariant");
5239     Exceptions::fthrow(
5240       THREAD_AND_LOCATION,
5241       vmSymbols::java_lang_ClassFormatError(),
5242       "Illegal method name \"%.*s\" in class %s", length, bytes,
5243       _class_name->as_C_string()
5244     );
5245     return;
5246   }
5247 }
5248 
5249 
5250 // Checks if signature is a legal field signature.
5251 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5252                                                    const Symbol* signature,
5253                                                    TRAPS) const {
5254   if (!_need_verify) { return; }
5255 
5256   const char* const bytes = (const char* const)signature->bytes();
5257   const unsigned int length = signature->utf8_length();
5258   const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5259 
5260   if (p == NULL || (p - bytes) != (int)length) {
5261     throwIllegalSignature("Field", name, signature, CHECK);
5262   }
5263 }
5264 
5265 // Checks if signature is a legal method signature.
5266 // Returns number of parameters
5267 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5268                                                    const Symbol* signature,
5269                                                    TRAPS) const {
5270   if (!_need_verify) {
5271     // make sure caller's args_size will be less than 0 even for non-static
5272     // method so it will be recomputed in compute_size_of_parameters().
5273     return -2;
5274   }
5275 
5276   // Class initializers cannot have args for class format version >= 51.
5277   if (name == vmSymbols::class_initializer_name() &&
5278       signature != vmSymbols::void_method_signature() &&
5279       _major_version >= JAVA_7_VERSION) {
5280     throwIllegalSignature("Method", name, signature, CHECK_0);
5281     return 0;
5282   }
5283 
5284   unsigned int args_size = 0;
5285   const char* p = (const char*)signature->bytes();
5286   unsigned int length = signature->utf8_length();
5287   const char* nextp;
5288 
5289   // The first character must be a '('
5290   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5291     length--;
5292     // Skip over legal field signatures
5293     nextp = skip_over_field_signature(p, false, length, CHECK_0);
5294     while ((length > 0) && (nextp != NULL)) {
5295       args_size++;
5296       if (p[0] == 'J' || p[0] == 'D') {
5297         args_size++;
5298       }
5299       length -= nextp - p;
5300       p = nextp;
5301       nextp = skip_over_field_signature(p, false, length, CHECK_0);
5302     }
5303     // The first non-signature thing better be a ')'
5304     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5305       length--;
5306       if (name->utf8_length() > 0 && name->char_at(0) == '<') {
5307         // All internal methods must return void
5308         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5309           return args_size;
5310         }
5311       } else {
5312         // Now we better just have a return value
5313         nextp = skip_over_field_signature(p, true, length, CHECK_0);
5314         if (nextp && ((int)length == (nextp - p))) {
5315           return args_size;
5316         }
5317       }
5318     }
5319   }
5320   // Report error
5321   throwIllegalSignature("Method", name, signature, CHECK_0);
5322   return 0;
5323 }
5324 
5325 int ClassFileParser::static_field_size() const {
5326   assert(_field_info != NULL, "invariant");
5327   return _field_info->static_field_size;
5328 }
5329 
5330 int ClassFileParser::total_oop_map_count() const {
5331   assert(_field_info != NULL, "invariant");
5332   return _field_info->total_oop_map_count;
5333 }
5334 
5335 jint ClassFileParser::layout_size() const {
5336   assert(_field_info != NULL, "invariant");
5337   return _field_info->instance_size;
5338 }
5339 
5340 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5341                                          const Array<Method*>* methods) {
5342   assert(ik != NULL, "invariant");
5343   assert(methods != NULL, "invariant");
5344 
5345   // Set up Method*::intrinsic_id as soon as we know the names of methods.
5346   // (We used to do this lazily, but now we query it in Rewriter,
5347   // which is eagerly done for every method, so we might as well do it now,
5348   // when everything is fresh in memory.)
5349   const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5350 
5351   if (klass_id != vmSymbols::NO_SID) {
5352     for (int j = 0; j < methods->length(); ++j) {
5353       Method* method = methods->at(j);
5354       method->init_intrinsic_id();
5355 
5356       if (CheckIntrinsics) {
5357         // Check if an intrinsic is defined for method 'method',
5358         // but the method is not annotated with @HotSpotIntrinsicCandidate.
5359         if (method->intrinsic_id() != vmIntrinsics::_none &&
5360             !method->intrinsic_candidate()) {
5361               tty->print("Compiler intrinsic is defined for method [%s], "
5362               "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5363               method->name_and_sig_as_C_string(),
5364               NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5365             );
5366           tty->cr();
5367           DEBUG_ONLY(vm_exit(1));
5368         }
5369         // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5370         // but there is no intrinsic available for it.
5371         if (method->intrinsic_candidate() &&
5372           method->intrinsic_id() == vmIntrinsics::_none) {
5373             tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5374               "but no compiler intrinsic is defined for the method.%s",
5375               method->name_and_sig_as_C_string(),
5376               NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5377             );
5378           tty->cr();
5379           DEBUG_ONLY(vm_exit(1));
5380         }
5381       }
5382     } // end for
5383 
5384 #ifdef ASSERT
5385     if (CheckIntrinsics) {
5386       // Check for orphan methods in the current class. A method m
5387       // of a class C is orphan if an intrinsic is defined for method m,
5388       // but class C does not declare m.
5389       // The check is potentially expensive, therefore it is available
5390       // only in debug builds.
5391 
5392       for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5393         if (vmIntrinsics::_compiledLambdaForm == id) {
5394           // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5395           // generated for the JVM from a LambdaForm and therefore no method
5396           // is defined for it.
5397           continue;
5398         }
5399 
5400         if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5401           // Check if the current class contains a method with the same
5402           // name, flags, signature.
5403           bool match = false;
5404           for (int j = 0; j < methods->length(); ++j) {
5405             const Method* method = methods->at(j);
5406             if (method->intrinsic_id() == id) {
5407               match = true;
5408               break;
5409             }
5410           }
5411 
5412           if (!match) {
5413             char buf[1000];
5414             tty->print("Compiler intrinsic is defined for method [%s], "
5415                        "but the method is not available in class [%s].%s",
5416                         vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5417                                                              buf, sizeof(buf)),
5418                         ik->name()->as_C_string(),
5419                         NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5420             );
5421             tty->cr();
5422             DEBUG_ONLY(vm_exit(1));
5423           }
5424         }
5425       } // end for
5426     } // CheckIntrinsics
5427 #endif // ASSERT
5428   }
5429 }
5430 
5431 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5432   if (_klass != NULL) {
5433     return _klass;
5434   }
5435 
5436   InstanceKlass* const ik =
5437     InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5438 
5439   fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5440 
5441   assert(_klass == ik, "invariant");
5442 
5443 
5444   if (ik->should_store_fingerprint()) {
5445     ik->store_fingerprint(_stream->compute_fingerprint());
5446   }
5447 
5448   ik->set_has_passed_fingerprint_check(false);
5449   if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5450     uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5451     uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5452     if (aot_fp != 0 && aot_fp == fp) {
5453       // This class matches with a class saved in an AOT library
5454       ik->set_has_passed_fingerprint_check(true);
5455     } else {
5456       ResourceMark rm;
5457       log_info(class, fingerprint)("%s :  expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5458                                  ik->external_name(), aot_fp, _stream->compute_fingerprint());
5459     }
5460   }
5461 
5462   return ik;
5463 }
5464 
5465 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5466   assert(ik != NULL, "invariant");
5467 
5468   // Set name and CLD before adding to CLD
5469   ik->set_class_loader_data(_loader_data);
5470   ik->set_name(_class_name);
5471 
5472   // Add all classes to our internal class loader list here,
5473   // including classes in the bootstrap (NULL) class loader.
5474   const bool publicize = !is_internal();
5475 
5476   _loader_data->add_class(ik, publicize);
5477 
5478   set_klass_to_deallocate(ik);
5479 
5480   assert(_field_info != NULL, "invariant");
5481   assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5482   assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5483     "sanity");
5484 
5485   assert(ik->is_instance_klass(), "sanity");
5486   assert(ik->size_helper() == _field_info->instance_size, "sanity");
5487 
5488   // Fill in information already parsed
5489   ik->set_should_verify_class(_need_verify);
5490 
5491   // Not yet: supers are done below to support the new subtype-checking fields
5492   ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5493   ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5494   assert(_fac != NULL, "invariant");
5495   ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5496 
5497   // this transfers ownership of a lot of arrays from
5498   // the parser onto the InstanceKlass*
5499   apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5500 
5501   // note that is not safe to use the fields in the parser from this point on
5502   assert(NULL == _cp, "invariant");
5503   assert(NULL == _fields, "invariant");
5504   assert(NULL == _methods, "invariant");
5505   assert(NULL == _inner_classes, "invariant");
5506   assert(NULL == _nest_members, "invariant");
5507   assert(NULL == _local_interfaces, "invariant");
5508   assert(NULL == _combined_annotations, "invariant");
5509 
5510   if (_has_final_method) {
5511     ik->set_has_final_method();
5512   }
5513 
5514   ik->copy_method_ordering(_method_ordering, CHECK);
5515   // The InstanceKlass::_methods_jmethod_ids cache
5516   // is managed on the assumption that the initial cache
5517   // size is equal to the number of methods in the class. If
5518   // that changes, then InstanceKlass::idnum_can_increment()
5519   // has to be changed accordingly.
5520   ik->set_initial_method_idnum(ik->methods()->length());
5521 
5522   ik->set_this_class_index(_this_class_index);
5523 
5524   if (is_unsafe_anonymous()) {
5525     // _this_class_index is a CONSTANT_Class entry that refers to this
5526     // anonymous class itself. If this class needs to refer to its own methods or
5527     // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5528     // _this_class_index. However, because this class is anonymous (it's
5529     // not stored in SystemDictionary), _this_class_index cannot be resolved
5530     // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5531     // Therefore, we must eagerly resolve _this_class_index now.
5532     ik->constants()->klass_at_put(_this_class_index, ik);
5533   }
5534 
5535   ik->set_minor_version(_minor_version);
5536   ik->set_major_version(_major_version);
5537   ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5538   ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5539 
5540   if (_unsafe_anonymous_host != NULL) {
5541     assert (ik->is_unsafe_anonymous(), "should be the same");
5542     ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5543   }
5544 
5545   // Set PackageEntry for this_klass
5546   oop cl = ik->class_loader();
5547   Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5548   ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5549   ik->set_package(cld, CHECK);
5550 
5551   const Array<Method*>* const methods = ik->methods();
5552   assert(methods != NULL, "invariant");
5553   const int methods_len = methods->length();
5554 
5555   check_methods_for_intrinsics(ik, methods);
5556 
5557   // Fill in field values obtained by parse_classfile_attributes
5558   if (_parsed_annotations->has_any_annotations()) {
5559     _parsed_annotations->apply_to(ik);
5560   }
5561 
5562   apply_parsed_class_attributes(ik);
5563 
5564   // Miranda methods
5565   if ((_num_miranda_methods > 0) ||
5566       // if this class introduced new miranda methods or
5567       (_super_klass != NULL && _super_klass->has_miranda_methods())
5568         // super class exists and this class inherited miranda methods
5569      ) {
5570        ik->set_has_miranda_methods(); // then set a flag
5571   }
5572 
5573   // Fill in information needed to compute superclasses.
5574   ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5575   ik->set_transitive_interfaces(_transitive_interfaces);
5576   _transitive_interfaces = NULL;
5577 
5578   // Initialize itable offset tables
5579   klassItable::setup_itable_offset_table(ik);
5580 
5581   // Compute transitive closure of interfaces this class implements
5582   // Do final class setup
5583   fill_oop_maps(ik,
5584                 _field_info->nonstatic_oop_map_count,
5585                 _field_info->nonstatic_oop_offsets,
5586                 _field_info->nonstatic_oop_counts);
5587 
5588   // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5589   set_precomputed_flags(ik);
5590 
5591   // check if this class can access its super class
5592   check_super_class_access(ik, CHECK);
5593 
5594   // check if this class can access its superinterfaces
5595   check_super_interface_access(ik, CHECK);
5596 
5597   // check if this class overrides any final method
5598   check_final_method_override(ik, CHECK);
5599 
5600   // reject static interface methods prior to Java 8
5601   if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5602     check_illegal_static_method(ik, CHECK);
5603   }
5604 
5605   // Obtain this_klass' module entry
5606   ModuleEntry* module_entry = ik->module();
5607   assert(module_entry != NULL, "module_entry should always be set");
5608 
5609   // Obtain java.lang.Module
5610   Handle module_handle(THREAD, module_entry->module());
5611 
5612   // Allocate mirror and initialize static fields
5613   // The create_mirror() call will also call compute_modifiers()
5614   java_lang_Class::create_mirror(ik,
5615                                  Handle(THREAD, _loader_data->class_loader()),
5616                                  module_handle,
5617                                  _protection_domain,
5618                                  CHECK);
5619 
5620   assert(_all_mirandas != NULL, "invariant");
5621 
5622   // Generate any default methods - default methods are public interface methods
5623   // that have a default implementation.  This is new with Java 8.
5624   if (_has_nonstatic_concrete_methods) {
5625     DefaultMethods::generate_default_methods(ik,
5626                                              _all_mirandas,
5627                                              CHECK);
5628   }
5629 
5630   // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5631   if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5632       !module_entry->has_default_read_edges()) {
5633     if (!module_entry->set_has_default_read_edges()) {
5634       // We won a potential race
5635       JvmtiExport::add_default_read_edges(module_handle, THREAD);
5636     }
5637   }
5638 
5639   ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5640 
5641   if (!is_internal()) {
5642     if (log_is_enabled(Info, class, load)) {
5643       ResourceMark rm;
5644       const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5645       ik->print_class_load_logging(_loader_data, module_name, _stream);
5646     }
5647 
5648     if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5649         ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5650         log_is_enabled(Info, class, preview)) {
5651       ResourceMark rm;
5652       log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5653                                ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5654     }
5655 
5656     if (log_is_enabled(Debug, class, resolve))  {
5657       ResourceMark rm;
5658       // print out the superclass.
5659       const char * from = ik->external_name();
5660       if (ik->java_super() != NULL) {
5661         log_debug(class, resolve)("%s %s (super)",
5662                    from,
5663                    ik->java_super()->external_name());
5664       }
5665       // print out each of the interface classes referred to by this class.
5666       const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5667       if (local_interfaces != NULL) {
5668         const int length = local_interfaces->length();
5669         for (int i = 0; i < length; i++) {
5670           const InstanceKlass* const k = local_interfaces->at(i);
5671           const char * to = k->external_name();
5672           log_debug(class, resolve)("%s %s (interface)", from, to);
5673         }
5674       }
5675     }
5676   }
5677 
5678   JFR_ONLY(INIT_ID(ik);)
5679 
5680   // If we reach here, all is well.
5681   // Now remove the InstanceKlass* from the _klass_to_deallocate field
5682   // in order for it to not be destroyed in the ClassFileParser destructor.
5683   set_klass_to_deallocate(NULL);
5684 
5685   // it's official
5686   set_klass(ik);
5687 
5688   debug_only(ik->verify();)
5689 }
5690 
5691 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5692   // Decrement the refcount in the old name, since we're clobbering it.
5693   _class_name->decrement_refcount();
5694 
5695   _class_name = new_class_name;
5696   // Increment the refcount of the new name.
5697   // Now the ClassFileParser owns this name and will decrement in
5698   // the destructor.
5699   _class_name->increment_refcount();
5700 }
5701 
5702 
5703 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5704 // package by prepending its host class's package name to its class name and setting
5705 // its _class_name field.
5706 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5707   ResourceMark rm(THREAD);
5708   assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5709          "Unsafe anonymous class should not be in a package");
5710   const char* host_pkg_name =
5711     ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5712 
5713   if (host_pkg_name != NULL) {
5714     int host_pkg_len = (int)strlen(host_pkg_name);
5715     int class_name_len = _class_name->utf8_length();
5716     int symbol_len = host_pkg_len + 1 + class_name_len;
5717     char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5718     int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
5719                          host_pkg_name, class_name_len, _class_name->base());
5720     assert(n == symbol_len, "Unexpected number of characters in string");
5721 
5722     // Decrement old _class_name to avoid leaking.
5723     _class_name->decrement_refcount();
5724 
5725     // Create a symbol and update the anonymous class name.
5726     // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5727     // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5728     // when the class is unloaded.
5729     _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
5730   }
5731 }
5732 
5733 // If the host class and the anonymous class are in the same package then do
5734 // nothing.  If the anonymous class is in the unnamed package then move it to its
5735 // host's package.  If the classes are in different packages then throw an IAE
5736 // exception.
5737 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5738   assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5739 
5740   const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5741                                                _class_name->utf8_length(), '/');
5742   if (anon_last_slash == NULL) {  // Unnamed package
5743     prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5744   } else {
5745     if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5746       ResourceMark rm(THREAD);
5747       THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5748         err_msg("Host class %s and anonymous class %s are in different packages",
5749         _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5750     }
5751   }
5752 }
5753 
5754 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5755   bool trusted = (loader_data->is_the_null_class_loader_data() ||
5756                   SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5757   bool need_verify =
5758     // verifyAll
5759     (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5760     // verifyRemote
5761     (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5762   return !need_verify;
5763 }
5764 
5765 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5766                                  Symbol* name,
5767                                  ClassLoaderData* loader_data,
5768                                  Handle protection_domain,
5769                                  const InstanceKlass* unsafe_anonymous_host,
5770                                  GrowableArray<Handle>* cp_patches,
5771                                  Publicity pub_level,
5772                                  TRAPS) :
5773   _stream(stream),
5774   _requested_name(name),
5775   _class_name(NULL),
5776   _loader_data(loader_data),
5777   _unsafe_anonymous_host(unsafe_anonymous_host),
5778   _cp_patches(cp_patches),
5779   _num_patched_klasses(0),
5780   _max_num_patched_klasses(0),
5781   _orig_cp_size(0),
5782   _first_patched_klass_resolved_index(0),
5783   _super_klass(),
5784   _cp(NULL),
5785   _fields(NULL),
5786   _methods(NULL),
5787   _inner_classes(NULL),
5788   _nest_members(NULL),
5789   _nest_host(0),
5790   _local_interfaces(NULL),
5791   _transitive_interfaces(NULL),
5792   _combined_annotations(NULL),
5793   _annotations(NULL),
5794   _type_annotations(NULL),
5795   _fields_annotations(NULL),
5796   _fields_type_annotations(NULL),
5797   _klass(NULL),
5798   _klass_to_deallocate(NULL),
5799   _parsed_annotations(NULL),
5800   _fac(NULL),
5801   _field_info(NULL),
5802   _method_ordering(NULL),
5803   _all_mirandas(NULL),
5804   _vtable_size(0),
5805   _itable_size(0),
5806   _num_miranda_methods(0),
5807   _rt(REF_NONE),
5808   _protection_domain(protection_domain),
5809   _access_flags(),
5810   _pub_level(pub_level),
5811   _bad_constant_seen(0),
5812   _synthetic_flag(false),
5813   _sde_length(false),
5814   _sde_buffer(NULL),
5815   _sourcefile_index(0),
5816   _generic_signature_index(0),
5817   _major_version(0),
5818   _minor_version(0),
5819   _this_class_index(0),
5820   _super_class_index(0),
5821   _itfs_len(0),
5822   _java_fields_count(0),
5823   _need_verify(false),
5824   _relax_verify(false),
5825   _has_nonstatic_concrete_methods(false),
5826   _declares_nonstatic_concrete_methods(false),
5827   _has_final_method(false),
5828   _has_finalizer(false),
5829   _has_empty_finalizer(false),
5830   _has_vanilla_constructor(false),
5831   _max_bootstrap_specifier_index(-1) {
5832 
5833   _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5834   _class_name->increment_refcount();
5835 
5836   assert(THREAD->is_Java_thread(), "invariant");
5837   assert(_loader_data != NULL, "invariant");
5838   assert(stream != NULL, "invariant");
5839   assert(_stream != NULL, "invariant");
5840   assert(_stream->buffer() == _stream->current(), "invariant");
5841   assert(_class_name != NULL, "invariant");
5842   assert(0 == _access_flags.as_int(), "invariant");
5843 
5844   // Figure out whether we can skip format checking (matching classic VM behavior)
5845   if (DumpSharedSpaces) {
5846     // verify == true means it's a 'remote' class (i.e., non-boot class)
5847     // Verification decision is based on BytecodeVerificationRemote flag
5848     // for those classes.
5849     _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5850                                               BytecodeVerificationLocal;
5851   }
5852   else {
5853     _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5854                                                stream->need_verify());
5855   }
5856   if (_cp_patches != NULL) {
5857     int len = _cp_patches->length();
5858     for (int i=0; i<len; i++) {
5859       if (has_cp_patch_at(i)) {
5860         Handle patch = cp_patch_at(i);
5861         if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
5862           // We need to append the names of the patched classes to the end of the constant pool,
5863           // because a patched class may have a Utf8 name that's not already included in the
5864           // original constant pool. These class names are used when patch_constant_pool()
5865           // calls patch_class().
5866           //
5867           // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
5868           // At this point, we don't know the tag for index i yet, because we haven't parsed the
5869           // constant pool. So we can only assume the worst -- every String is used to patch a Class.
5870           _max_num_patched_klasses++;
5871         }
5872       }
5873     }
5874   }
5875 
5876   // synch back verification state to stream
5877   stream->set_verify(_need_verify);
5878 
5879   // Check if verification needs to be relaxed for this class file
5880   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5881   _relax_verify = relax_format_check_for(_loader_data);
5882 
5883   parse_stream(stream, CHECK);
5884 
5885   post_process_parsed_stream(stream, _cp, CHECK);
5886 }
5887 
5888 void ClassFileParser::clear_class_metadata() {
5889   // metadata created before the instance klass is created.  Must be
5890   // deallocated if classfile parsing returns an error.
5891   _cp = NULL;
5892   _fields = NULL;
5893   _methods = NULL;
5894   _inner_classes = NULL;
5895   _nest_members = NULL;
5896   _local_interfaces = NULL;
5897   _combined_annotations = NULL;
5898   _annotations = _type_annotations = NULL;
5899   _fields_annotations = _fields_type_annotations = NULL;
5900 }
5901 
5902 // Destructor to clean up
5903 ClassFileParser::~ClassFileParser() {
5904   _class_name->decrement_refcount();
5905 
5906   if (_cp != NULL) {
5907     MetadataFactory::free_metadata(_loader_data, _cp);
5908   }
5909   if (_fields != NULL) {
5910     MetadataFactory::free_array<u2>(_loader_data, _fields);
5911   }
5912 
5913   if (_methods != NULL) {
5914     // Free methods
5915     InstanceKlass::deallocate_methods(_loader_data, _methods);
5916   }
5917 
5918   // beware of the Universe::empty_blah_array!!
5919   if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5920     MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5921   }
5922 
5923   if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
5924     MetadataFactory::free_array<u2>(_loader_data, _nest_members);
5925   }
5926 
5927   // Free interfaces
5928   InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5929                                        _local_interfaces, _transitive_interfaces);
5930 
5931   if (_combined_annotations != NULL) {
5932     // After all annotations arrays have been created, they are installed into the
5933     // Annotations object that will be assigned to the InstanceKlass being created.
5934 
5935     // Deallocate the Annotations object and the installed annotations arrays.
5936     _combined_annotations->deallocate_contents(_loader_data);
5937 
5938     // If the _combined_annotations pointer is non-NULL,
5939     // then the other annotations fields should have been cleared.
5940     assert(_annotations             == NULL, "Should have been cleared");
5941     assert(_type_annotations        == NULL, "Should have been cleared");
5942     assert(_fields_annotations      == NULL, "Should have been cleared");
5943     assert(_fields_type_annotations == NULL, "Should have been cleared");
5944   } else {
5945     // If the annotations arrays were not installed into the Annotations object,
5946     // then they have to be deallocated explicitly.
5947     MetadataFactory::free_array<u1>(_loader_data, _annotations);
5948     MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5949     Annotations::free_contents(_loader_data, _fields_annotations);
5950     Annotations::free_contents(_loader_data, _fields_type_annotations);
5951   }
5952 
5953   clear_class_metadata();
5954   _transitive_interfaces = NULL;
5955 
5956   // deallocate the klass if already created.  Don't directly deallocate, but add
5957   // to the deallocate list so that the klass is removed from the CLD::_klasses list
5958   // at a safepoint.
5959   if (_klass_to_deallocate != NULL) {
5960     _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5961   }
5962 }
5963 
5964 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5965                                    TRAPS) {
5966 
5967   assert(stream != NULL, "invariant");
5968   assert(_class_name != NULL, "invariant");
5969 
5970   // BEGIN STREAM PARSING
5971   stream->guarantee_more(8, CHECK);  // magic, major, minor
5972   // Magic value
5973   const u4 magic = stream->get_u4_fast();
5974   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5975                      "Incompatible magic value %u in class file %s",
5976                      magic, CHECK);
5977 
5978   // Version numbers
5979   _minor_version = stream->get_u2_fast();
5980   _major_version = stream->get_u2_fast();
5981 
5982   if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
5983     ResourceMark rm;
5984     warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
5985             _major_version,  _minor_version, _class_name->as_C_string());
5986     Exceptions::fthrow(
5987       THREAD_AND_LOCATION,
5988       vmSymbols::java_lang_UnsupportedClassVersionError(),
5989       "Unsupported major.minor version for dump time %u.%u",
5990       _major_version,
5991       _minor_version);
5992   }
5993 
5994   // Check version numbers - we check this even with verifier off
5995   verify_class_version(_major_version, _minor_version, _class_name, CHECK);
5996 
5997   stream->guarantee_more(3, CHECK); // length, first cp tag
5998   u2 cp_size = stream->get_u2_fast();
5999 
6000   guarantee_property(
6001     cp_size >= 1, "Illegal constant pool size %u in class file %s",
6002     cp_size, CHECK);
6003 
6004   _orig_cp_size = cp_size;
6005   if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6006     THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6007   }
6008   cp_size += _max_num_patched_klasses;
6009 
6010   _cp = ConstantPool::allocate(_loader_data,
6011                                cp_size,
6012                                CHECK);
6013 
6014   ConstantPool* const cp = _cp;
6015 
6016   parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6017 
6018   assert(cp_size == (const u2)cp->length(), "invariant");
6019 
6020   // ACCESS FLAGS
6021   stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
6022 
6023   // Access flags
6024   jint flags;
6025   // JVM_ACC_MODULE is defined in JDK-9 and later.
6026   if (_major_version >= JAVA_9_VERSION) {
6027     flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6028   } else {
6029     flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6030   }
6031 
6032   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6033     // Set abstract bit for old class files for backward compatibility
6034     flags |= JVM_ACC_ABSTRACT;
6035   }
6036 
6037   verify_legal_class_modifiers(flags, CHECK);
6038 
6039   short bad_constant = class_bad_constant_seen();
6040   if (bad_constant != 0) {
6041     // Do not throw CFE until after the access_flags are checked because if
6042     // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6043     classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6044   }
6045 
6046   _access_flags.set_flags(flags);
6047 
6048   // This class and superclass
6049   _this_class_index = stream->get_u2_fast();
6050   check_property(
6051     valid_cp_range(_this_class_index, cp_size) &&
6052       cp->tag_at(_this_class_index).is_unresolved_klass(),
6053     "Invalid this class index %u in constant pool in class file %s",
6054     _this_class_index, CHECK);
6055 
6056   Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6057   assert(class_name_in_cp != NULL, "class_name can't be null");
6058 
6059   // Update _class_name to reflect the name in the constant pool
6060   update_class_name(class_name_in_cp);
6061 
6062   // Don't need to check whether this class name is legal or not.
6063   // It has been checked when constant pool is parsed.
6064   // However, make sure it is not an array type.
6065   if (_need_verify) {
6066     guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6067                        "Bad class name in class file %s",
6068                        CHECK);
6069   }
6070 
6071   // Checks if name in class file matches requested name
6072   if (_requested_name != NULL && _requested_name != _class_name) {
6073     ResourceMark rm(THREAD);
6074     Exceptions::fthrow(
6075       THREAD_AND_LOCATION,
6076       vmSymbols::java_lang_NoClassDefFoundError(),
6077       "%s (wrong name: %s)",
6078       _class_name->as_C_string(),
6079       _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6080     );
6081     return;
6082   }
6083 
6084   // if this is an anonymous class fix up its name if it's in the unnamed
6085   // package.  Otherwise, throw IAE if it is in a different package than
6086   // its host class.
6087   if (_unsafe_anonymous_host != NULL) {
6088     fix_unsafe_anonymous_class_name(CHECK);
6089   }
6090 
6091   // Verification prevents us from creating names with dots in them, this
6092   // asserts that that's the case.
6093   assert(is_internal_format(_class_name), "external class name format used internally");
6094 
6095   if (!is_internal()) {
6096     LogTarget(Debug, class, preorder) lt;
6097     if (lt.is_enabled()){
6098       ResourceMark rm(THREAD);
6099       LogStream ls(lt);
6100       ls.print("%s", _class_name->as_klass_external_name());
6101       if (stream->source() != NULL) {
6102         ls.print(" source: %s", stream->source());
6103       }
6104       ls.cr();
6105     }
6106 
6107 #if INCLUDE_CDS
6108     if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6109       if (!ClassLoader::has_jrt_entry()) {
6110         warning("DumpLoadedClassList and CDS are not supported in exploded build");
6111         DumpLoadedClassList = NULL;
6112       } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6113                  _unsafe_anonymous_host == NULL) {
6114         // Only dump the classes that can be stored into CDS archive.
6115         // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6116         oop class_loader = _loader_data->class_loader();
6117         ResourceMark rm(THREAD);
6118         bool skip = false;
6119         if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6120           // For the boot and platform class loaders, skip classes that are not found in the
6121           // java runtime image, such as those found in the --patch-module entries.
6122           // These classes can't be loaded from the archive during runtime.
6123           if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6124             skip = true;
6125           }
6126 
6127           if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6128             // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6129             // as they can be loaded from the archive during runtime.
6130             skip = false;
6131           }
6132         }
6133         if (skip) {
6134           tty->print_cr("skip writing class %s from source %s to classlist file",
6135             _class_name->as_C_string(), stream->source());
6136         } else {
6137           classlist_file->print_cr("%s", _class_name->as_C_string());
6138           classlist_file->flush();
6139         }
6140       }
6141     }
6142 #endif
6143   }
6144 
6145   // SUPERKLASS
6146   _super_class_index = stream->get_u2_fast();
6147   _super_klass = parse_super_class(cp,
6148                                    _super_class_index,
6149                                    _need_verify,
6150                                    CHECK);
6151 
6152   // Interfaces
6153   _itfs_len = stream->get_u2_fast();
6154   parse_interfaces(stream,
6155                    _itfs_len,
6156                    cp,
6157                    &_has_nonstatic_concrete_methods,
6158                    CHECK);
6159 
6160   assert(_local_interfaces != NULL, "invariant");
6161 
6162   // Fields (offsets are filled in later)
6163   _fac = new FieldAllocationCount();
6164   parse_fields(stream,
6165                _access_flags.is_interface(),
6166                _fac,
6167                cp,
6168                cp_size,
6169                &_java_fields_count,
6170                CHECK);
6171 
6172   assert(_fields != NULL, "invariant");
6173 
6174   // Methods
6175   AccessFlags promoted_flags;
6176   parse_methods(stream,
6177                 _access_flags.is_interface(),
6178                 &promoted_flags,
6179                 &_has_final_method,
6180                 &_declares_nonstatic_concrete_methods,
6181                 CHECK);
6182 
6183   assert(_methods != NULL, "invariant");
6184 
6185   // promote flags from parse_methods() to the klass' flags
6186   _access_flags.add_promoted_flags(promoted_flags.as_int());
6187 
6188   if (_declares_nonstatic_concrete_methods) {
6189     _has_nonstatic_concrete_methods = true;
6190   }
6191 
6192   // Additional attributes/annotations
6193   _parsed_annotations = new ClassAnnotationCollector();
6194   parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6195 
6196   assert(_inner_classes != NULL, "invariant");
6197 
6198   // Finalize the Annotations metadata object,
6199   // now that all annotation arrays have been created.
6200   create_combined_annotations(CHECK);
6201 
6202   // Make sure this is the end of class file stream
6203   guarantee_property(stream->at_eos(),
6204                      "Extra bytes at the end of class file %s",
6205                      CHECK);
6206 
6207   // all bytes in stream read and parsed
6208 }
6209 
6210 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6211                                                  ConstantPool* cp,
6212                                                  TRAPS) {
6213   assert(stream != NULL, "invariant");
6214   assert(stream->at_eos(), "invariant");
6215   assert(cp != NULL, "invariant");
6216   assert(_loader_data != NULL, "invariant");
6217 
6218   if (_class_name == vmSymbols::java_lang_Object()) {
6219     check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6220                    "java.lang.Object cannot implement an interface in class file %s",
6221                    CHECK);
6222   }
6223   // We check super class after class file is parsed and format is checked
6224   if (_super_class_index > 0 && NULL ==_super_klass) {
6225     Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6226     if (_access_flags.is_interface()) {
6227       // Before attempting to resolve the superclass, check for class format
6228       // errors not checked yet.
6229       guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6230         "Interfaces must have java.lang.Object as superclass in class file %s",
6231         CHECK);
6232     }
6233     Handle loader(THREAD, _loader_data->class_loader());
6234     _super_klass = (const InstanceKlass*)
6235                        SystemDictionary::resolve_super_or_fail(_class_name,
6236                                                                super_class_name,
6237                                                                loader,
6238                                                                _protection_domain,
6239                                                                true,
6240                                                                CHECK);
6241   }
6242 
6243   if (_super_klass != NULL) {
6244     if (_super_klass->has_nonstatic_concrete_methods()) {
6245       _has_nonstatic_concrete_methods = true;
6246     }
6247 
6248     if (_super_klass->is_interface()) {
6249       ResourceMark rm(THREAD);
6250       Exceptions::fthrow(
6251         THREAD_AND_LOCATION,
6252         vmSymbols::java_lang_IncompatibleClassChangeError(),
6253         "class %s has interface %s as super class",
6254         _class_name->as_klass_external_name(),
6255         _super_klass->external_name()
6256       );
6257       return;
6258     }
6259     // Make sure super class is not final
6260     if (_super_klass->is_final()) {
6261       THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6262     }
6263   }
6264 
6265   // Compute the transitive list of all unique interfaces implemented by this class
6266   _transitive_interfaces =
6267     compute_transitive_interfaces(_super_klass,
6268                                   _local_interfaces,
6269                                   _loader_data,
6270                                   CHECK);
6271 
6272   assert(_transitive_interfaces != NULL, "invariant");
6273 
6274   // sort methods
6275   _method_ordering = sort_methods(_methods);
6276 
6277   _all_mirandas = new GrowableArray<Method*>(20);
6278 
6279   Handle loader(THREAD, _loader_data->class_loader());
6280   klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6281                                                     &_num_miranda_methods,
6282                                                     _all_mirandas,
6283                                                     _super_klass,
6284                                                     _methods,
6285                                                     _access_flags,
6286                                                     _major_version,
6287                                                     loader,
6288                                                     _class_name,
6289                                                     _local_interfaces,
6290                                                     CHECK);
6291 
6292   // Size of Java itable (in words)
6293   _itable_size = _access_flags.is_interface() ? 0 :
6294     klassItable::compute_itable_size(_transitive_interfaces);
6295 
6296   assert(_fac != NULL, "invariant");
6297   assert(_parsed_annotations != NULL, "invariant");
6298 
6299   _field_info = new FieldLayoutInfo();
6300   layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6301 
6302   // Compute reference typ
6303   _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6304 
6305 }
6306 
6307 void ClassFileParser::set_klass(InstanceKlass* klass) {
6308 
6309 #ifdef ASSERT
6310   if (klass != NULL) {
6311     assert(NULL == _klass, "leaking?");
6312   }
6313 #endif
6314 
6315   _klass = klass;
6316 }
6317 
6318 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6319 
6320 #ifdef ASSERT
6321   if (klass != NULL) {
6322     assert(NULL == _klass_to_deallocate, "leaking?");
6323   }
6324 #endif
6325 
6326   _klass_to_deallocate = klass;
6327 }
6328 
6329 // Caller responsible for ResourceMark
6330 // clone stream with rewound position
6331 const ClassFileStream* ClassFileParser::clone_stream() const {
6332   assert(_stream != NULL, "invariant");
6333 
6334   return _stream->clone();
6335 }
6336 // ----------------------------------------------------------------------------
6337 // debugging
6338 
6339 #ifdef ASSERT
6340 
6341 // return true if class_name contains no '.' (internal format is '/')
6342 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6343   if (class_name != NULL) {
6344     ResourceMark rm;
6345     char* name = class_name->as_C_string();
6346     return strchr(name, '.') == NULL;
6347   } else {
6348     return true;
6349   }
6350 }
6351 
6352 #endif