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     //tty->print_cr("length of the _fields array %d for class %s", i, _class_name->as_klass_external_name());
1753   }
1754 
1755   if (_need_verify && length > 1) {
1756     // Check duplicated fields
1757     ResourceMark rm(THREAD);
1758     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1759       THREAD, NameSigHash*, HASH_ROW_SIZE);
1760     initialize_hashtable(names_and_sigs);
1761     bool dup = false;
1762     const Symbol* name = NULL;
1763     const Symbol* sig = NULL;
1764     {
1765       debug_only(NoSafepointVerifier nsv;)
1766       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1767         name = fs.name();
1768         sig = fs.signature();
1769         // If no duplicates, add name/signature in hashtable names_and_sigs.
1770         if (!put_after_lookup(name, sig, names_and_sigs)) {
1771           dup = true;
1772           break;
1773         }
1774       }
1775     }
1776     if (dup) {
1777       classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1778                              name->as_C_string(), sig->as_klass_external_name(), CHECK);
1779     }
1780   }
1781 }
1782 
1783 
1784 const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1785                                                                          u4 code_length,
1786                                                                          u4 exception_table_length,
1787                                                                          TRAPS) {
1788   assert(cfs != NULL, "invariant");
1789 
1790   const unsafe_u2* const exception_table_start = cfs->current();
1791   assert(exception_table_start != NULL, "null exception table");
1792 
1793   cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1794                                                                // end_pc,
1795                                                                // handler_pc,
1796                                                                // catch_type_index
1797 
1798   // Will check legal target after parsing code array in verifier.
1799   if (_need_verify) {
1800     for (unsigned int i = 0; i < exception_table_length; i++) {
1801       const u2 start_pc = cfs->get_u2_fast();
1802       const u2 end_pc = cfs->get_u2_fast();
1803       const u2 handler_pc = cfs->get_u2_fast();
1804       const u2 catch_type_index = cfs->get_u2_fast();
1805       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1806                          "Illegal exception table range in class file %s",
1807                          CHECK_NULL);
1808       guarantee_property(handler_pc < code_length,
1809                          "Illegal exception table handler in class file %s",
1810                          CHECK_NULL);
1811       if (catch_type_index != 0) {
1812         guarantee_property(valid_klass_reference_at(catch_type_index),
1813                            "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1814       }
1815     }
1816   } else {
1817     cfs->skip_u2_fast(exception_table_length * 4);
1818   }
1819   return exception_table_start;
1820 }
1821 
1822 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1823                                              u4 code_length,
1824                                              CompressedLineNumberWriteStream**const write_stream,
1825                                              TRAPS) {
1826 
1827   const ClassFileStream* const cfs = _stream;
1828   unsigned int num_entries = cfs->get_u2(CHECK);
1829 
1830   // Each entry is a u2 start_pc, and a u2 line_number
1831   const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1832 
1833   // Verify line number attribute and table length
1834   check_property(
1835     code_attribute_length == sizeof(u2) + length_in_bytes,
1836     "LineNumberTable attribute has wrong length in class file %s", CHECK);
1837 
1838   cfs->guarantee_more(length_in_bytes, CHECK);
1839 
1840   if ((*write_stream) == NULL) {
1841     if (length_in_bytes > fixed_buffer_size) {
1842       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1843     } else {
1844       (*write_stream) = new CompressedLineNumberWriteStream(
1845         _linenumbertable_buffer, fixed_buffer_size);
1846     }
1847   }
1848 
1849   while (num_entries-- > 0) {
1850     const u2 bci  = cfs->get_u2_fast(); // start_pc
1851     const u2 line = cfs->get_u2_fast(); // line_number
1852     guarantee_property(bci < code_length,
1853         "Invalid pc in LineNumberTable in class file %s", CHECK);
1854     (*write_stream)->write_pair(bci, line);
1855   }
1856 }
1857 
1858 
1859 class LVT_Hash : public AllStatic {
1860  public:
1861 
1862   static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1863   /*
1864    * 3-tuple start_bci/length/slot has to be unique key,
1865    * so the following comparison seems to be redundant:
1866    *       && elem->name_cp_index == entry->_elem->name_cp_index
1867    */
1868     return (e0.start_bci     == e1.start_bci &&
1869             e0.length        == e1.length &&
1870             e0.name_cp_index == e1.name_cp_index &&
1871             e0.slot          == e1.slot);
1872   }
1873 
1874   static unsigned int hash(LocalVariableTableElement const& e0) {
1875     unsigned int raw_hash = e0.start_bci;
1876 
1877     raw_hash = e0.length        + raw_hash * 37;
1878     raw_hash = e0.name_cp_index + raw_hash * 37;
1879     raw_hash = e0.slot          + raw_hash * 37;
1880 
1881     return raw_hash;
1882   }
1883 };
1884 
1885 
1886 // Class file LocalVariableTable elements.
1887 class Classfile_LVT_Element {
1888  public:
1889   u2 start_bci;
1890   u2 length;
1891   u2 name_cp_index;
1892   u2 descriptor_cp_index;
1893   u2 slot;
1894 };
1895 
1896 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1897                              LocalVariableTableElement* const lvt) {
1898   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
1899   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
1900   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1901   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1902   lvt->signature_cp_index  = 0;
1903   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
1904 }
1905 
1906 // Function is used to parse both attributes:
1907 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1908 const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1909                                                                              u4 code_length,
1910                                                                              u2 max_locals,
1911                                                                              u4 code_attribute_length,
1912                                                                              u2* const localvariable_table_length,
1913                                                                              bool isLVTT,
1914                                                                              TRAPS) {
1915   const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1916   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1917   const unsigned int size =
1918     (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1919 
1920   const ConstantPool* const cp = _cp;
1921 
1922   // Verify local variable table attribute has right length
1923   if (_need_verify) {
1924     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1925                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1926   }
1927 
1928   const unsafe_u2* const localvariable_table_start = cfs->current();
1929   assert(localvariable_table_start != NULL, "null local variable table");
1930   if (!_need_verify) {
1931     cfs->skip_u2_fast(size);
1932   } else {
1933     cfs->guarantee_more(size * 2, CHECK_NULL);
1934     for(int i = 0; i < (*localvariable_table_length); i++) {
1935       const u2 start_pc = cfs->get_u2_fast();
1936       const u2 length = cfs->get_u2_fast();
1937       const u2 name_index = cfs->get_u2_fast();
1938       const u2 descriptor_index = cfs->get_u2_fast();
1939       const u2 index = cfs->get_u2_fast();
1940       // Assign to a u4 to avoid overflow
1941       const u4 end_pc = (u4)start_pc + (u4)length;
1942 
1943       if (start_pc >= code_length) {
1944         classfile_parse_error(
1945           "Invalid start_pc %u in %s in class file %s",
1946           start_pc, tbl_name, CHECK_NULL);
1947       }
1948       if (end_pc > code_length) {
1949         classfile_parse_error(
1950           "Invalid length %u in %s in class file %s",
1951           length, tbl_name, CHECK_NULL);
1952       }
1953       const int cp_size = cp->length();
1954       guarantee_property(valid_symbol_at(name_index),
1955         "Name index %u in %s has bad constant type in class file %s",
1956         name_index, tbl_name, CHECK_NULL);
1957       guarantee_property(valid_symbol_at(descriptor_index),
1958         "Signature index %u in %s has bad constant type in class file %s",
1959         descriptor_index, tbl_name, CHECK_NULL);
1960 
1961       const Symbol* const name = cp->symbol_at(name_index);
1962       const Symbol* const sig = cp->symbol_at(descriptor_index);
1963       verify_legal_field_name(name, CHECK_NULL);
1964       u2 extra_slot = 0;
1965       if (!isLVTT) {
1966         verify_legal_field_signature(name, sig, CHECK_NULL);
1967 
1968         // 4894874: check special cases for double and long local variables
1969         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1970             sig == vmSymbols::type_signature(T_LONG)) {
1971           extra_slot = 1;
1972         }
1973       }
1974       guarantee_property((index + extra_slot) < max_locals,
1975                           "Invalid index %u in %s in class file %s",
1976                           index, tbl_name, CHECK_NULL);
1977     }
1978   }
1979   return localvariable_table_start;
1980 }
1981 
1982 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1983                                       u4 code_attribute_length,
1984                                       bool need_verify,
1985                                       TRAPS) {
1986   assert(cfs != NULL, "invariant");
1987 
1988   if (0 == code_attribute_length) {
1989     return NULL;
1990   }
1991 
1992   const u1* const stackmap_table_start = cfs->current();
1993   assert(stackmap_table_start != NULL, "null stackmap table");
1994 
1995   // check code_attribute_length first
1996   cfs->skip_u1(code_attribute_length, CHECK_NULL);
1997 
1998   if (!need_verify && !DumpSharedSpaces) {
1999     return NULL;
2000   }
2001   return stackmap_table_start;
2002 }
2003 
2004 const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
2005                                                                             u2* const checked_exceptions_length,
2006                                                                             u4 method_attribute_length,
2007                                                                             TRAPS) {
2008   assert(cfs != NULL, "invariant");
2009   assert(checked_exceptions_length != NULL, "invariant");
2010 
2011   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
2012   *checked_exceptions_length = cfs->get_u2_fast();
2013   const unsigned int size =
2014     (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
2015   const unsafe_u2* const checked_exceptions_start = cfs->current();
2016   assert(checked_exceptions_start != NULL, "null checked exceptions");
2017   if (!_need_verify) {
2018     cfs->skip_u2_fast(size);
2019   } else {
2020     // Verify each value in the checked exception table
2021     u2 checked_exception;
2022     const u2 len = *checked_exceptions_length;
2023     cfs->guarantee_more(2 * len, CHECK_NULL);
2024     for (int i = 0; i < len; i++) {
2025       checked_exception = cfs->get_u2_fast();
2026       check_property(
2027         valid_klass_reference_at(checked_exception),
2028         "Exception name has bad type at constant pool %u in class file %s",
2029         checked_exception, CHECK_NULL);
2030     }
2031   }
2032   // check exceptions attribute length
2033   if (_need_verify) {
2034     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
2035                                                    sizeof(u2) * size),
2036                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
2037   }
2038   return checked_exceptions_start;
2039 }
2040 
2041 void ClassFileParser::throwIllegalSignature(const char* type,
2042                                             const Symbol* name,
2043                                             const Symbol* sig,
2044                                             TRAPS) const {
2045   assert(name != NULL, "invariant");
2046   assert(sig != NULL, "invariant");
2047 
2048   ResourceMark rm(THREAD);
2049   Exceptions::fthrow(THREAD_AND_LOCATION,
2050       vmSymbols::java_lang_ClassFormatError(),
2051       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
2052       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
2053 }
2054 
2055 AnnotationCollector::ID
2056 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
2057                                       const Symbol* name) {
2058   const vmSymbols::SID sid = vmSymbols::find_sid(name);
2059   // Privileged code can use all annotations.  Other code silently drops some.
2060   const bool privileged = loader_data->is_the_null_class_loader_data() ||
2061                           loader_data->is_platform_class_loader_data() ||
2062                           loader_data->is_unsafe_anonymous();
2063   switch (sid) {
2064     case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
2065       if (_location != _in_method)  break;  // only allow for methods
2066       if (!privileged)              break;  // only allow in privileged code
2067       return _method_CallerSensitive;
2068     }
2069     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
2070       if (_location != _in_method)  break;  // only allow for methods
2071       if (!privileged)              break;  // only allow in privileged code
2072       return _method_ForceInline;
2073     }
2074     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
2075       if (_location != _in_method)  break;  // only allow for methods
2076       if (!privileged)              break;  // only allow in privileged code
2077       return _method_DontInline;
2078     }
2079     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
2080       if (_location != _in_method)  break;  // only allow for methods
2081       if (!privileged)              break;  // only allow in privileged code
2082       return _method_InjectedProfile;
2083     }
2084     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2085       if (_location != _in_method)  break;  // only allow for methods
2086       if (!privileged)              break;  // only allow in privileged code
2087       return _method_LambdaForm_Compiled;
2088     }
2089     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Hidden_signature): {
2090       if (_location != _in_method)  break;  // only allow for methods
2091       if (!privileged)              break;  // only allow in privileged code
2092       return _method_Hidden;
2093     }
2094     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2095       if (_location != _in_method)  break;  // only allow for methods
2096       if (!privileged)              break;  // only allow in privileged code
2097       return _method_HotSpotIntrinsicCandidate;
2098     }
2099     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2100       if (_location != _in_field)   break;  // only allow for fields
2101       if (!privileged)              break;  // only allow in privileged code
2102       return _field_Stable;
2103     }
2104     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2105       if (_location != _in_field && _location != _in_class) {
2106         break;  // only allow for fields and classes
2107       }
2108       if (!EnableContended || (RestrictContended && !privileged)) {
2109         break;  // honor privileges
2110       }
2111       return _jdk_internal_vm_annotation_Contended;
2112     }
2113     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2114       if (_location != _in_method)  break;  // only allow for methods
2115       if (RestrictReservedStack && !privileged) break; // honor privileges
2116       return _jdk_internal_vm_annotation_ReservedStackAccess;
2117     }
2118     default: {
2119       break;
2120     }
2121   }
2122   return AnnotationCollector::_unknown;
2123 }
2124 
2125 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2126   if (is_contended())
2127     f->set_contended_group(contended_group());
2128   if (is_stable())
2129     f->set_stable(true);
2130 }
2131 
2132 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2133   // If there's an error deallocate metadata for field annotations
2134   MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2135   MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2136 }
2137 
2138 void MethodAnnotationCollector::apply_to(const methodHandle& m) {
2139   if (has_annotation(_method_CallerSensitive))
2140     m->set_caller_sensitive(true);
2141   if (has_annotation(_method_ForceInline))
2142     m->set_force_inline(true);
2143   if (has_annotation(_method_DontInline))
2144     m->set_dont_inline(true);
2145   if (has_annotation(_method_InjectedProfile))
2146     m->set_has_injected_profile(true);
2147   if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2148     m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2149   if (has_annotation(_method_Hidden))
2150     m->set_hidden(true);
2151   if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2152     m->set_intrinsic_candidate(true);
2153   if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2154     m->set_has_reserved_stack_access(true);
2155 }
2156 
2157 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2158   assert(ik != NULL, "invariant");
2159   ik->set_is_contended(is_contended());
2160 }
2161 
2162 #define MAX_ARGS_SIZE 255
2163 #define MAX_CODE_SIZE 65535
2164 #define INITIAL_MAX_LVT_NUMBER 256
2165 
2166 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2167  *
2168  * Rules for LVT's and LVTT's are:
2169  *   - There can be any number of LVT's and LVTT's.
2170  *   - If there are n LVT's, it is the same as if there was just
2171  *     one LVT containing all the entries from the n LVT's.
2172  *   - There may be no more than one LVT entry per local variable.
2173  *     Two LVT entries are 'equal' if these fields are the same:
2174  *        start_pc, length, name, slot
2175  *   - There may be no more than one LVTT entry per each LVT entry.
2176  *     Each LVTT entry has to match some LVT entry.
2177  *   - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2178  */
2179 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2180                                                int lvt_cnt,
2181                                                u2* const localvariable_table_length,
2182                                                const unsafe_u2** const localvariable_table_start,
2183                                                int lvtt_cnt,
2184                                                u2* const localvariable_type_table_length,
2185                                                const unsafe_u2** const localvariable_type_table_start,
2186                                                TRAPS) {
2187 
2188   ResourceMark rm(THREAD);
2189 
2190   typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2191                             &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2192 
2193   LVT_HashTable* const table = new LVT_HashTable();
2194 
2195   // To fill LocalVariableTable in
2196   const Classfile_LVT_Element* cf_lvt;
2197   LocalVariableTableElement* lvt = cm->localvariable_table_start();
2198 
2199   for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2200     cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2201     for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2202       copy_lvt_element(&cf_lvt[idx], lvt);
2203       // If no duplicates, add LVT elem in hashtable.
2204       if (table->put(*lvt, lvt) == false
2205           && _need_verify
2206           && _major_version >= JAVA_1_5_VERSION) {
2207         classfile_parse_error("Duplicated LocalVariableTable attribute "
2208                               "entry for '%s' in class file %s",
2209                                _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2210                                CHECK);
2211       }
2212     }
2213   }
2214 
2215   // To merge LocalVariableTable and LocalVariableTypeTable
2216   const Classfile_LVT_Element* cf_lvtt;
2217   LocalVariableTableElement lvtt_elem;
2218 
2219   for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2220     cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2221     for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2222       copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2223       LocalVariableTableElement** entry = table->get(lvtt_elem);
2224       if (entry == NULL) {
2225         if (_need_verify) {
2226           classfile_parse_error("LVTT entry for '%s' in class file %s "
2227                                 "does not match any LVT entry",
2228                                  _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2229                                  CHECK);
2230         }
2231       } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2232         classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2233                               "entry for '%s' in class file %s",
2234                                _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2235                                CHECK);
2236       } else {
2237         // to add generic signatures into LocalVariableTable
2238         (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2239       }
2240     }
2241   }
2242 }
2243 
2244 
2245 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2246                                        const u1* runtime_visible_annotations,
2247                                        int runtime_visible_annotations_length,
2248                                        const u1* runtime_invisible_annotations,
2249                                        int runtime_invisible_annotations_length,
2250                                        const u1* runtime_visible_parameter_annotations,
2251                                        int runtime_visible_parameter_annotations_length,
2252                                        const u1* runtime_invisible_parameter_annotations,
2253                                        int runtime_invisible_parameter_annotations_length,
2254                                        const u1* runtime_visible_type_annotations,
2255                                        int runtime_visible_type_annotations_length,
2256                                        const u1* runtime_invisible_type_annotations,
2257                                        int runtime_invisible_type_annotations_length,
2258                                        const u1* annotation_default,
2259                                        int annotation_default_length,
2260                                        TRAPS) {
2261 
2262   AnnotationArray* a;
2263 
2264   if (runtime_visible_annotations_length +
2265       runtime_invisible_annotations_length > 0) {
2266      a = assemble_annotations(runtime_visible_annotations,
2267                               runtime_visible_annotations_length,
2268                               runtime_invisible_annotations,
2269                               runtime_invisible_annotations_length,
2270                               CHECK);
2271      cm->set_method_annotations(a);
2272   }
2273 
2274   if (runtime_visible_parameter_annotations_length +
2275       runtime_invisible_parameter_annotations_length > 0) {
2276     a = assemble_annotations(runtime_visible_parameter_annotations,
2277                              runtime_visible_parameter_annotations_length,
2278                              runtime_invisible_parameter_annotations,
2279                              runtime_invisible_parameter_annotations_length,
2280                              CHECK);
2281     cm->set_parameter_annotations(a);
2282   }
2283 
2284   if (annotation_default_length > 0) {
2285     a = assemble_annotations(annotation_default,
2286                              annotation_default_length,
2287                              NULL,
2288                              0,
2289                              CHECK);
2290     cm->set_default_annotations(a);
2291   }
2292 
2293   if (runtime_visible_type_annotations_length +
2294       runtime_invisible_type_annotations_length > 0) {
2295     a = assemble_annotations(runtime_visible_type_annotations,
2296                              runtime_visible_type_annotations_length,
2297                              runtime_invisible_type_annotations,
2298                              runtime_invisible_type_annotations_length,
2299                              CHECK);
2300     cm->set_type_annotations(a);
2301   }
2302 }
2303 
2304 
2305 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2306 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2307 // Method* to save footprint, so we only know the size of the resulting Method* when the
2308 // entire method attribute is parsed.
2309 //
2310 // The promoted_flags parameter is used to pass relevant access_flags
2311 // from the method back up to the containing klass. These flag values
2312 // are added to klass's access_flags.
2313 
2314 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2315                                       bool is_interface,
2316                                       const ConstantPool* cp,
2317                                       AccessFlags* const promoted_flags,
2318                                       TRAPS) {
2319   assert(cfs != NULL, "invariant");
2320   assert(cp != NULL, "invariant");
2321   assert(promoted_flags != NULL, "invariant");
2322 
2323   ResourceMark rm(THREAD);
2324   // Parse fixed parts:
2325   // access_flags, name_index, descriptor_index, attributes_count
2326   cfs->guarantee_more(8, CHECK_NULL);
2327 
2328   int flags = cfs->get_u2_fast();
2329   const u2 name_index = cfs->get_u2_fast();
2330   const int cp_size = cp->length();
2331   check_property(
2332     valid_symbol_at(name_index),
2333     "Illegal constant pool index %u for method name in class file %s",
2334     name_index, CHECK_NULL);
2335   const Symbol* const name = cp->symbol_at(name_index);
2336   verify_legal_method_name(name, CHECK_NULL);
2337 
2338   const u2 signature_index = cfs->get_u2_fast();
2339   guarantee_property(
2340     valid_symbol_at(signature_index),
2341     "Illegal constant pool index %u for method signature in class file %s",
2342     signature_index, CHECK_NULL);
2343   const Symbol* const signature = cp->symbol_at(signature_index);
2344 
2345   if (name == vmSymbols::class_initializer_name()) {
2346     // We ignore the other access flags for a valid class initializer.
2347     // (JVM Spec 2nd ed., chapter 4.6)
2348     if (_major_version < 51) { // backward compatibility
2349       flags = JVM_ACC_STATIC;
2350     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2351       flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2352     } else {
2353       classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2354     }
2355   } else {
2356     verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2357   }
2358 
2359   if (name == vmSymbols::object_initializer_name() && is_interface) {
2360     classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2361   }
2362 
2363   int args_size = -1;  // only used when _need_verify is true
2364   if (_need_verify) {
2365     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2366                  verify_legal_method_signature(name, signature, CHECK_NULL);
2367     if (args_size > MAX_ARGS_SIZE) {
2368       classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2369     }
2370   }
2371 
2372   AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2373 
2374   // Default values for code and exceptions attribute elements
2375   u2 max_stack = 0;
2376   u2 max_locals = 0;
2377   u4 code_length = 0;
2378   const u1* code_start = 0;
2379   u2 exception_table_length = 0;
2380   const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2381   Array<int>* exception_handlers = Universe::the_empty_int_array();
2382   u2 checked_exceptions_length = 0;
2383   const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
2384   CompressedLineNumberWriteStream* linenumber_table = NULL;
2385   int linenumber_table_length = 0;
2386   int total_lvt_length = 0;
2387   u2 lvt_cnt = 0;
2388   u2 lvtt_cnt = 0;
2389   bool lvt_allocated = false;
2390   u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2391   u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2392   u2* localvariable_table_length = NULL;
2393   const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
2394   u2* localvariable_type_table_length = NULL;
2395   const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
2396   int method_parameters_length = -1;
2397   const u1* method_parameters_data = NULL;
2398   bool method_parameters_seen = false;
2399   bool parsed_code_attribute = false;
2400   bool parsed_checked_exceptions_attribute = false;
2401   bool parsed_stackmap_attribute = false;
2402   // stackmap attribute - JDK1.5
2403   const u1* stackmap_data = NULL;
2404   int stackmap_data_length = 0;
2405   u2 generic_signature_index = 0;
2406   MethodAnnotationCollector parsed_annotations;
2407   const u1* runtime_visible_annotations = NULL;
2408   int runtime_visible_annotations_length = 0;
2409   const u1* runtime_invisible_annotations = NULL;
2410   int runtime_invisible_annotations_length = 0;
2411   const u1* runtime_visible_parameter_annotations = NULL;
2412   int runtime_visible_parameter_annotations_length = 0;
2413   const u1* runtime_invisible_parameter_annotations = NULL;
2414   int runtime_invisible_parameter_annotations_length = 0;
2415   const u1* runtime_visible_type_annotations = NULL;
2416   int runtime_visible_type_annotations_length = 0;
2417   const u1* runtime_invisible_type_annotations = NULL;
2418   int runtime_invisible_type_annotations_length = 0;
2419   bool runtime_invisible_annotations_exists = false;
2420   bool runtime_invisible_type_annotations_exists = false;
2421   bool runtime_invisible_parameter_annotations_exists = false;
2422   const u1* annotation_default = NULL;
2423   int annotation_default_length = 0;
2424 
2425   // Parse code and exceptions attribute
2426   u2 method_attributes_count = cfs->get_u2_fast();
2427   while (method_attributes_count--) {
2428     cfs->guarantee_more(6, CHECK_NULL);  // method_attribute_name_index, method_attribute_length
2429     const u2 method_attribute_name_index = cfs->get_u2_fast();
2430     const u4 method_attribute_length = cfs->get_u4_fast();
2431     check_property(
2432       valid_symbol_at(method_attribute_name_index),
2433       "Invalid method attribute name index %u in class file %s",
2434       method_attribute_name_index, CHECK_NULL);
2435 
2436     const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2437     if (method_attribute_name == vmSymbols::tag_code()) {
2438       // Parse Code attribute
2439       if (_need_verify) {
2440         guarantee_property(
2441             !access_flags.is_native() && !access_flags.is_abstract(),
2442                         "Code attribute in native or abstract methods in class file %s",
2443                          CHECK_NULL);
2444       }
2445       if (parsed_code_attribute) {
2446         classfile_parse_error("Multiple Code attributes in class file %s",
2447                               CHECK_NULL);
2448       }
2449       parsed_code_attribute = true;
2450 
2451       // Stack size, locals size, and code size
2452       if (_major_version == 45 && _minor_version <= 2) {
2453         cfs->guarantee_more(4, CHECK_NULL);
2454         max_stack = cfs->get_u1_fast();
2455         max_locals = cfs->get_u1_fast();
2456         code_length = cfs->get_u2_fast();
2457       } else {
2458         cfs->guarantee_more(8, CHECK_NULL);
2459         max_stack = cfs->get_u2_fast();
2460         max_locals = cfs->get_u2_fast();
2461         code_length = cfs->get_u4_fast();
2462       }
2463       if (_need_verify) {
2464         guarantee_property(args_size <= max_locals,
2465                            "Arguments can't fit into locals in class file %s",
2466                            CHECK_NULL);
2467         guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2468                            "Invalid method Code length %u in class file %s",
2469                            code_length, CHECK_NULL);
2470       }
2471       // Code pointer
2472       code_start = cfs->current();
2473       assert(code_start != NULL, "null code start");
2474       cfs->guarantee_more(code_length, CHECK_NULL);
2475       cfs->skip_u1_fast(code_length);
2476 
2477       // Exception handler table
2478       cfs->guarantee_more(2, CHECK_NULL);  // exception_table_length
2479       exception_table_length = cfs->get_u2_fast();
2480       if (exception_table_length > 0) {
2481         exception_table_start = parse_exception_table(cfs,
2482                                                       code_length,
2483                                                       exception_table_length,
2484                                                       CHECK_NULL);
2485       }
2486 
2487       // Parse additional attributes in code attribute
2488       cfs->guarantee_more(2, CHECK_NULL);  // code_attributes_count
2489       u2 code_attributes_count = cfs->get_u2_fast();
2490 
2491       unsigned int calculated_attribute_length = 0;
2492 
2493       if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2494         calculated_attribute_length =
2495             sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2496       } else {
2497         // max_stack, locals and length are smaller in pre-version 45.2 classes
2498         calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2499       }
2500       calculated_attribute_length +=
2501         code_length +
2502         sizeof(exception_table_length) +
2503         sizeof(code_attributes_count) +
2504         exception_table_length *
2505             ( sizeof(u2) +   // start_pc
2506               sizeof(u2) +   // end_pc
2507               sizeof(u2) +   // handler_pc
2508               sizeof(u2) );  // catch_type_index
2509 
2510       while (code_attributes_count--) {
2511         cfs->guarantee_more(6, CHECK_NULL);  // code_attribute_name_index, code_attribute_length
2512         const u2 code_attribute_name_index = cfs->get_u2_fast();
2513         const u4 code_attribute_length = cfs->get_u4_fast();
2514         calculated_attribute_length += code_attribute_length +
2515                                        sizeof(code_attribute_name_index) +
2516                                        sizeof(code_attribute_length);
2517         check_property(valid_symbol_at(code_attribute_name_index),
2518                        "Invalid code attribute name index %u in class file %s",
2519                        code_attribute_name_index,
2520                        CHECK_NULL);
2521         if (LoadLineNumberTables &&
2522             cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2523           // Parse and compress line number table
2524           parse_linenumber_table(code_attribute_length,
2525                                  code_length,
2526                                  &linenumber_table,
2527                                  CHECK_NULL);
2528 
2529         } else if (LoadLocalVariableTables &&
2530                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2531           // Parse local variable table
2532           if (!lvt_allocated) {
2533             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2534               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2535             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2536               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2537             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2538               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2539             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2540               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2541             lvt_allocated = true;
2542           }
2543           if (lvt_cnt == max_lvt_cnt) {
2544             max_lvt_cnt <<= 1;
2545             localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2546             localvariable_table_start  = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2547           }
2548           localvariable_table_start[lvt_cnt] =
2549             parse_localvariable_table(cfs,
2550                                       code_length,
2551                                       max_locals,
2552                                       code_attribute_length,
2553                                       &localvariable_table_length[lvt_cnt],
2554                                       false,    // is not LVTT
2555                                       CHECK_NULL);
2556           total_lvt_length += localvariable_table_length[lvt_cnt];
2557           lvt_cnt++;
2558         } else if (LoadLocalVariableTypeTables &&
2559                    _major_version >= JAVA_1_5_VERSION &&
2560                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2561           if (!lvt_allocated) {
2562             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2563               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2564             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2565               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2566             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2567               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2568             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2569               THREAD, const unsafe_u2*, INITIAL_MAX_LVT_NUMBER);
2570             lvt_allocated = true;
2571           }
2572           // Parse local variable type table
2573           if (lvtt_cnt == max_lvtt_cnt) {
2574             max_lvtt_cnt <<= 1;
2575             localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2576             localvariable_type_table_start  = REALLOC_RESOURCE_ARRAY(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2577           }
2578           localvariable_type_table_start[lvtt_cnt] =
2579             parse_localvariable_table(cfs,
2580                                       code_length,
2581                                       max_locals,
2582                                       code_attribute_length,
2583                                       &localvariable_type_table_length[lvtt_cnt],
2584                                       true,     // is LVTT
2585                                       CHECK_NULL);
2586           lvtt_cnt++;
2587         } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2588                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2589           // Stack map is only needed by the new verifier in JDK1.5.
2590           if (parsed_stackmap_attribute) {
2591             classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2592           }
2593           stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2594           stackmap_data_length = code_attribute_length;
2595           parsed_stackmap_attribute = true;
2596         } else {
2597           // Skip unknown attributes
2598           cfs->skip_u1(code_attribute_length, CHECK_NULL);
2599         }
2600       }
2601       // check method attribute length
2602       if (_need_verify) {
2603         guarantee_property(method_attribute_length == calculated_attribute_length,
2604                            "Code segment has wrong length in class file %s",
2605                            CHECK_NULL);
2606       }
2607     } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2608       // Parse Exceptions attribute
2609       if (parsed_checked_exceptions_attribute) {
2610         classfile_parse_error("Multiple Exceptions attributes in class file %s",
2611                               CHECK_NULL);
2612       }
2613       parsed_checked_exceptions_attribute = true;
2614       checked_exceptions_start =
2615             parse_checked_exceptions(cfs,
2616                                      &checked_exceptions_length,
2617                                      method_attribute_length,
2618                                      CHECK_NULL);
2619     } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2620       // reject multiple method parameters
2621       if (method_parameters_seen) {
2622         classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2623                               CHECK_NULL);
2624       }
2625       method_parameters_seen = true;
2626       method_parameters_length = cfs->get_u1_fast();
2627       const u2 real_length = (method_parameters_length * 4u) + 1u;
2628       if (method_attribute_length != real_length) {
2629         classfile_parse_error(
2630           "Invalid MethodParameters method attribute length %u in class file",
2631           method_attribute_length, CHECK_NULL);
2632       }
2633       method_parameters_data = cfs->current();
2634       cfs->skip_u2_fast(method_parameters_length);
2635       cfs->skip_u2_fast(method_parameters_length);
2636       // ignore this attribute if it cannot be reflected
2637       if (!SystemDictionary::Parameter_klass_loaded())
2638         method_parameters_length = -1;
2639     } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2640       if (method_attribute_length != 0) {
2641         classfile_parse_error(
2642           "Invalid Synthetic method attribute length %u in class file %s",
2643           method_attribute_length, CHECK_NULL);
2644       }
2645       // Should we check that there hasn't already been a synthetic attribute?
2646       access_flags.set_is_synthetic();
2647     } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2648       if (method_attribute_length != 0) {
2649         classfile_parse_error(
2650           "Invalid Deprecated method attribute length %u in class file %s",
2651           method_attribute_length, CHECK_NULL);
2652       }
2653     } else if (_major_version >= JAVA_1_5_VERSION) {
2654       if (method_attribute_name == vmSymbols::tag_signature()) {
2655         if (generic_signature_index != 0) {
2656           classfile_parse_error(
2657             "Multiple Signature attributes for method in class file %s",
2658             CHECK_NULL);
2659         }
2660         if (method_attribute_length != 2) {
2661           classfile_parse_error(
2662             "Invalid Signature attribute length %u in class file %s",
2663             method_attribute_length, CHECK_NULL);
2664         }
2665         generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2666       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2667         if (runtime_visible_annotations != NULL) {
2668           classfile_parse_error(
2669             "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2670             CHECK_NULL);
2671         }
2672         runtime_visible_annotations_length = method_attribute_length;
2673         runtime_visible_annotations = cfs->current();
2674         assert(runtime_visible_annotations != NULL, "null visible annotations");
2675         cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2676         parse_annotations(cp,
2677                           runtime_visible_annotations,
2678                           runtime_visible_annotations_length,
2679                           &parsed_annotations,
2680                           _loader_data,
2681                           CHECK_NULL);
2682         cfs->skip_u1_fast(runtime_visible_annotations_length);
2683       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2684         if (runtime_invisible_annotations_exists) {
2685           classfile_parse_error(
2686             "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2687             CHECK_NULL);
2688         }
2689         runtime_invisible_annotations_exists = true;
2690         if (PreserveAllAnnotations) {
2691           runtime_invisible_annotations_length = method_attribute_length;
2692           runtime_invisible_annotations = cfs->current();
2693           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2694         }
2695         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2696       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2697         if (runtime_visible_parameter_annotations != NULL) {
2698           classfile_parse_error(
2699             "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2700             CHECK_NULL);
2701         }
2702         runtime_visible_parameter_annotations_length = method_attribute_length;
2703         runtime_visible_parameter_annotations = cfs->current();
2704         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2705         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2706       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2707         if (runtime_invisible_parameter_annotations_exists) {
2708           classfile_parse_error(
2709             "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2710             CHECK_NULL);
2711         }
2712         runtime_invisible_parameter_annotations_exists = true;
2713         if (PreserveAllAnnotations) {
2714           runtime_invisible_parameter_annotations_length = method_attribute_length;
2715           runtime_invisible_parameter_annotations = cfs->current();
2716           assert(runtime_invisible_parameter_annotations != NULL,
2717             "null invisible parameter annotations");
2718         }
2719         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2720       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2721         if (annotation_default != NULL) {
2722           classfile_parse_error(
2723             "Multiple AnnotationDefault attributes for method in class file %s",
2724             CHECK_NULL);
2725         }
2726         annotation_default_length = method_attribute_length;
2727         annotation_default = cfs->current();
2728         assert(annotation_default != NULL, "null annotation default");
2729         cfs->skip_u1(annotation_default_length, CHECK_NULL);
2730       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2731         if (runtime_visible_type_annotations != NULL) {
2732           classfile_parse_error(
2733             "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2734             CHECK_NULL);
2735         }
2736         runtime_visible_type_annotations_length = method_attribute_length;
2737         runtime_visible_type_annotations = cfs->current();
2738         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2739         // No need for the VM to parse Type annotations
2740         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2741       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2742         if (runtime_invisible_type_annotations_exists) {
2743           classfile_parse_error(
2744             "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2745             CHECK_NULL);
2746         } else {
2747           runtime_invisible_type_annotations_exists = true;
2748         }
2749         if (PreserveAllAnnotations) {
2750           runtime_invisible_type_annotations_length = method_attribute_length;
2751           runtime_invisible_type_annotations = cfs->current();
2752           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2753         }
2754         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2755       } else {
2756         // Skip unknown attributes
2757         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2758       }
2759     } else {
2760       // Skip unknown attributes
2761       cfs->skip_u1(method_attribute_length, CHECK_NULL);
2762     }
2763   }
2764 
2765   if (linenumber_table != NULL) {
2766     linenumber_table->write_terminator();
2767     linenumber_table_length = linenumber_table->position();
2768   }
2769 
2770   // Make sure there's at least one Code attribute in non-native/non-abstract method
2771   if (_need_verify) {
2772     guarantee_property(access_flags.is_native() ||
2773                        access_flags.is_abstract() ||
2774                        parsed_code_attribute,
2775                        "Absent Code attribute in method that is not native or abstract in class file %s",
2776                        CHECK_NULL);
2777   }
2778 
2779   // All sizing information for a Method* is finally available, now create it
2780   InlineTableSizes sizes(
2781       total_lvt_length,
2782       linenumber_table_length,
2783       exception_table_length,
2784       checked_exceptions_length,
2785       method_parameters_length,
2786       generic_signature_index,
2787       runtime_visible_annotations_length +
2788            runtime_invisible_annotations_length,
2789       runtime_visible_parameter_annotations_length +
2790            runtime_invisible_parameter_annotations_length,
2791       runtime_visible_type_annotations_length +
2792            runtime_invisible_type_annotations_length,
2793       annotation_default_length,
2794       0);
2795 
2796   Method* const m = Method::allocate(_loader_data,
2797                                      code_length,
2798                                      access_flags,
2799                                      &sizes,
2800                                      ConstMethod::NORMAL,
2801                                      CHECK_NULL);
2802 
2803   ClassLoadingService::add_class_method_size(m->size()*wordSize);
2804 
2805   // Fill in information from fixed part (access_flags already set)
2806   m->set_constants(_cp);
2807   m->set_name_index(name_index);
2808   m->set_signature_index(signature_index);
2809 
2810   ResultTypeFinder rtf(cp->symbol_at(signature_index));
2811   m->constMethod()->set_result_type(rtf.type());
2812 
2813   if (args_size >= 0) {
2814     m->set_size_of_parameters(args_size);
2815   } else {
2816     m->compute_size_of_parameters(THREAD);
2817   }
2818 #ifdef ASSERT
2819   if (args_size >= 0) {
2820     m->compute_size_of_parameters(THREAD);
2821     assert(args_size == m->size_of_parameters(), "");
2822   }
2823 #endif
2824 
2825   // Fill in code attribute information
2826   m->set_max_stack(max_stack);
2827   m->set_max_locals(max_locals);
2828   if (stackmap_data != NULL) {
2829     m->constMethod()->copy_stackmap_data(_loader_data,
2830                                          (u1*)stackmap_data,
2831                                          stackmap_data_length,
2832                                          CHECK_NULL);
2833   }
2834 
2835   // Copy byte codes
2836   m->set_code((u1*)code_start);
2837 
2838   // Copy line number table
2839   if (linenumber_table != NULL) {
2840     memcpy(m->compressed_linenumber_table(),
2841            linenumber_table->buffer(),
2842            linenumber_table_length);
2843   }
2844 
2845   // Copy exception table
2846   if (exception_table_length > 0) {
2847     Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
2848                                                 m->exception_table_start(),
2849                                                 exception_table_length * sizeof(ExceptionTableElement),
2850                                                 sizeof(u2));
2851   }
2852 
2853   // Copy method parameters
2854   if (method_parameters_length > 0) {
2855     MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2856     for (int i = 0; i < method_parameters_length; i++) {
2857       elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2858       method_parameters_data += 2;
2859       elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2860       method_parameters_data += 2;
2861     }
2862   }
2863 
2864   // Copy checked exceptions
2865   if (checked_exceptions_length > 0) {
2866     Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
2867                                                 m->checked_exceptions_start(),
2868                                                 checked_exceptions_length * sizeof(CheckedExceptionElement),
2869                                                 sizeof(u2));
2870   }
2871 
2872   // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2873   if (total_lvt_length > 0) {
2874     promoted_flags->set_has_localvariable_table();
2875     copy_localvariable_table(m->constMethod(),
2876                              lvt_cnt,
2877                              localvariable_table_length,
2878                              localvariable_table_start,
2879                              lvtt_cnt,
2880                              localvariable_type_table_length,
2881                              localvariable_type_table_start,
2882                              CHECK_NULL);
2883   }
2884 
2885   if (parsed_annotations.has_any_annotations())
2886     parsed_annotations.apply_to(m);
2887 
2888   // Copy annotations
2889   copy_method_annotations(m->constMethod(),
2890                           runtime_visible_annotations,
2891                           runtime_visible_annotations_length,
2892                           runtime_invisible_annotations,
2893                           runtime_invisible_annotations_length,
2894                           runtime_visible_parameter_annotations,
2895                           runtime_visible_parameter_annotations_length,
2896                           runtime_invisible_parameter_annotations,
2897                           runtime_invisible_parameter_annotations_length,
2898                           runtime_visible_type_annotations,
2899                           runtime_visible_type_annotations_length,
2900                           runtime_invisible_type_annotations,
2901                           runtime_invisible_type_annotations_length,
2902                           annotation_default,
2903                           annotation_default_length,
2904                           CHECK_NULL);
2905 
2906   if (name == vmSymbols::finalize_method_name() &&
2907       signature == vmSymbols::void_method_signature()) {
2908     if (m->is_empty_method()) {
2909       _has_empty_finalizer = true;
2910     } else {
2911       _has_finalizer = true;
2912     }
2913   }
2914   if (name == vmSymbols::object_initializer_name() &&
2915       signature == vmSymbols::void_method_signature() &&
2916       m->is_vanilla_constructor()) {
2917     _has_vanilla_constructor = true;
2918   }
2919 
2920   NOT_PRODUCT(m->verify());
2921   return m;
2922 }
2923 
2924 
2925 // The promoted_flags parameter is used to pass relevant access_flags
2926 // from the methods back up to the containing klass. These flag values
2927 // are added to klass's access_flags.
2928 // Side-effects: populates the _methods field in the parser
2929 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2930                                     bool is_interface,
2931                                     AccessFlags* promoted_flags,
2932                                     bool* has_final_method,
2933                                     bool* declares_nonstatic_concrete_methods,
2934                                     TRAPS) {
2935   assert(cfs != NULL, "invariant");
2936   assert(promoted_flags != NULL, "invariant");
2937   assert(has_final_method != NULL, "invariant");
2938   assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2939 
2940   assert(NULL == _methods, "invariant");
2941 
2942   cfs->guarantee_more(2, CHECK);  // length
2943   const u2 length = cfs->get_u2_fast();
2944   if (length == 0) {
2945     _methods = Universe::the_empty_method_array();
2946   } else {
2947     _methods = MetadataFactory::new_array<Method*>(_loader_data,
2948                                                    length,
2949                                                    NULL,
2950                                                    CHECK);
2951 
2952     for (int index = 0; index < length; index++) {
2953       Method* method = parse_method(cfs,
2954                                     is_interface,
2955                                     _cp,
2956                                     promoted_flags,
2957                                     CHECK);
2958 
2959       if (method->is_final()) {
2960         *has_final_method = true;
2961       }
2962       // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2963       // used for interface initialization, and default method inheritance analysis
2964       if (is_interface && !(*declares_nonstatic_concrete_methods)
2965         && !method->is_abstract() && !method->is_static()) {
2966         *declares_nonstatic_concrete_methods = true;
2967       }
2968       _methods->at_put(index, method);
2969     }
2970 
2971     if (_need_verify && length > 1) {
2972       // Check duplicated methods
2973       ResourceMark rm(THREAD);
2974       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2975         THREAD, NameSigHash*, HASH_ROW_SIZE);
2976       initialize_hashtable(names_and_sigs);
2977       bool dup = false;
2978       const Symbol* name = NULL;
2979       const Symbol* sig = NULL;
2980       {
2981         debug_only(NoSafepointVerifier nsv;)
2982         for (int i = 0; i < length; i++) {
2983           const Method* const m = _methods->at(i);
2984           name = m->name();
2985           sig = m->signature();
2986           // If no duplicates, add name/signature in hashtable names_and_sigs.
2987           if (!put_after_lookup(name, sig, names_and_sigs)) {
2988             dup = true;
2989             break;
2990           }
2991         }
2992       }
2993       if (dup) {
2994         classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2995                                name->as_C_string(), sig->as_klass_external_name(), CHECK);
2996       }
2997     }
2998   }
2999 }
3000 
3001 static const intArray* sort_methods(Array<Method*>* methods) {
3002   const int length = methods->length();
3003   // If JVMTI original method ordering or sharing is enabled we have to
3004   // remember the original class file ordering.
3005   // We temporarily use the vtable_index field in the Method* to store the
3006   // class file index, so we can read in after calling qsort.
3007   // Put the method ordering in the shared archive.
3008   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3009     for (int index = 0; index < length; index++) {
3010       Method* const m = methods->at(index);
3011       assert(!m->valid_vtable_index(), "vtable index should not be set");
3012       m->set_vtable_index(index);
3013     }
3014   }
3015   // Sort method array by ascending method name (for faster lookups & vtable construction)
3016   // Note that the ordering is not alphabetical, see Symbol::fast_compare
3017   Method::sort_methods(methods);
3018 
3019   intArray* method_ordering = NULL;
3020   // If JVMTI original method ordering or sharing is enabled construct int
3021   // array remembering the original ordering
3022   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
3023     method_ordering = new intArray(length, length, -1);
3024     for (int index = 0; index < length; index++) {
3025       Method* const m = methods->at(index);
3026       const int old_index = m->vtable_index();
3027       assert(old_index >= 0 && old_index < length, "invalid method index");
3028       method_ordering->at_put(index, old_index);
3029       m->set_vtable_index(Method::invalid_vtable_index);
3030     }
3031   }
3032   return method_ordering;
3033 }
3034 
3035 // Parse generic_signature attribute for methods and fields
3036 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
3037                                                       TRAPS) {
3038   assert(cfs != NULL, "invariant");
3039 
3040   cfs->guarantee_more(2, CHECK_0);  // generic_signature_index
3041   const u2 generic_signature_index = cfs->get_u2_fast();
3042   check_property(
3043     valid_symbol_at(generic_signature_index),
3044     "Invalid Signature attribute at constant pool index %u in class file %s",
3045     generic_signature_index, CHECK_0);
3046   return generic_signature_index;
3047 }
3048 
3049 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
3050                                                            TRAPS) {
3051 
3052   assert(cfs != NULL, "invariant");
3053 
3054   cfs->guarantee_more(2, CHECK);  // sourcefile_index
3055   const u2 sourcefile_index = cfs->get_u2_fast();
3056   check_property(
3057     valid_symbol_at(sourcefile_index),
3058     "Invalid SourceFile attribute at constant pool index %u in class file %s",
3059     sourcefile_index, CHECK);
3060   set_class_sourcefile_index(sourcefile_index);
3061 }
3062 
3063 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
3064                                                                        int length,
3065                                                                        TRAPS) {
3066   assert(cfs != NULL, "invariant");
3067 
3068   const u1* const sde_buffer = cfs->current();
3069   assert(sde_buffer != NULL, "null sde buffer");
3070 
3071   // Don't bother storing it if there is no way to retrieve it
3072   if (JvmtiExport::can_get_source_debug_extension()) {
3073     assert((length+1) > length, "Overflow checking");
3074     u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
3075     for (int i = 0; i < length; i++) {
3076       sde[i] = sde_buffer[i];
3077     }
3078     sde[length] = '\0';
3079     set_class_sde_buffer((const char*)sde, length);
3080   }
3081   // Got utf8 string, set stream position forward
3082   cfs->skip_u1(length, CHECK);
3083 }
3084 
3085 
3086 // Inner classes can be static, private or protected (classic VM does this)
3087 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3088                                            JVM_ACC_PRIVATE |                \
3089                                            JVM_ACC_PROTECTED |              \
3090                                            JVM_ACC_STATIC                   \
3091                                          )
3092 
3093 // Return number of classes in the inner classes attribute table
3094 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3095                                                             const u1* const inner_classes_attribute_start,
3096                                                             bool parsed_enclosingmethod_attribute,
3097                                                             u2 enclosing_method_class_index,
3098                                                             u2 enclosing_method_method_index,
3099                                                             TRAPS) {
3100   const u1* const current_mark = cfs->current();
3101   u2 length = 0;
3102   if (inner_classes_attribute_start != NULL) {
3103     cfs->set_current(inner_classes_attribute_start);
3104     cfs->guarantee_more(2, CHECK_0);  // length
3105     length = cfs->get_u2_fast();
3106   }
3107 
3108   // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3109   // method data:
3110   //   [inner_class_info_index,
3111   //    outer_class_info_index,
3112   //    inner_name_index,
3113   //    inner_class_access_flags,
3114   //    ...
3115   //    enclosing_method_class_index,
3116   //    enclosing_method_method_index]
3117   const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3118   Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3119   _inner_classes = inner_classes;
3120 
3121   int index = 0;
3122   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
3123   for (int n = 0; n < length; n++) {
3124     // Inner class index
3125     const u2 inner_class_info_index = cfs->get_u2_fast();
3126     check_property(
3127       valid_klass_reference_at(inner_class_info_index),
3128       "inner_class_info_index %u has bad constant type in class file %s",
3129       inner_class_info_index, CHECK_0);
3130     // Outer class index
3131     const u2 outer_class_info_index = cfs->get_u2_fast();
3132     check_property(
3133       outer_class_info_index == 0 ||
3134         valid_klass_reference_at(outer_class_info_index),
3135       "outer_class_info_index %u has bad constant type in class file %s",
3136       outer_class_info_index, CHECK_0);
3137     // Inner class name
3138     const u2 inner_name_index = cfs->get_u2_fast();
3139     check_property(
3140       inner_name_index == 0 || valid_symbol_at(inner_name_index),
3141       "inner_name_index %u has bad constant type in class file %s",
3142       inner_name_index, CHECK_0);
3143     if (_need_verify) {
3144       guarantee_property(inner_class_info_index != outer_class_info_index,
3145                          "Class is both outer and inner class in class file %s", CHECK_0);
3146     }
3147     // Access flags
3148     jint flags;
3149     // JVM_ACC_MODULE is defined in JDK-9 and later.
3150     if (_major_version >= JAVA_9_VERSION) {
3151       flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
3152     } else {
3153       flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3154     }
3155     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3156       // Set abstract bit for old class files for backward compatibility
3157       flags |= JVM_ACC_ABSTRACT;
3158     }
3159     verify_legal_class_modifiers(flags, CHECK_0);
3160     AccessFlags inner_access_flags(flags);
3161 
3162     inner_classes->at_put(index++, inner_class_info_index);
3163     inner_classes->at_put(index++, outer_class_info_index);
3164     inner_classes->at_put(index++, inner_name_index);
3165     inner_classes->at_put(index++, inner_access_flags.as_short());
3166   }
3167 
3168   // 4347400: make sure there's no duplicate entry in the classes array
3169   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3170     for(int i = 0; i < length * 4; i += 4) {
3171       for(int j = i + 4; j < length * 4; j += 4) {
3172         guarantee_property((inner_classes->at(i)   != inner_classes->at(j) ||
3173                             inner_classes->at(i+1) != inner_classes->at(j+1) ||
3174                             inner_classes->at(i+2) != inner_classes->at(j+2) ||
3175                             inner_classes->at(i+3) != inner_classes->at(j+3)),
3176                             "Duplicate entry in InnerClasses in class file %s",
3177                             CHECK_0);
3178       }
3179     }
3180   }
3181 
3182   // Set EnclosingMethod class and method indexes.
3183   if (parsed_enclosingmethod_attribute) {
3184     inner_classes->at_put(index++, enclosing_method_class_index);
3185     inner_classes->at_put(index++, enclosing_method_method_index);
3186   }
3187   assert(index == size, "wrong size");
3188 
3189   // Restore buffer's current position.
3190   cfs->set_current(current_mark);
3191 
3192   return length;
3193 }
3194 
3195 u2 ClassFileParser::parse_classfile_nest_members_attribute(const ClassFileStream* const cfs,
3196                                                            const u1* const nest_members_attribute_start,
3197                                                            TRAPS) {
3198   const u1* const current_mark = cfs->current();
3199   u2 length = 0;
3200   if (nest_members_attribute_start != NULL) {
3201     cfs->set_current(nest_members_attribute_start);
3202     cfs->guarantee_more(2, CHECK_0);  // length
3203     length = cfs->get_u2_fast();
3204   }
3205   const int size = length;
3206   Array<u2>* const nest_members = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3207   _nest_members = nest_members;
3208 
3209   int index = 0;
3210   cfs->guarantee_more(2 * length, CHECK_0);
3211   for (int n = 0; n < length; n++) {
3212     const u2 class_info_index = cfs->get_u2_fast();
3213     check_property(
3214       valid_klass_reference_at(class_info_index),
3215       "Nest member class_info_index %u has bad constant type in class file %s",
3216       class_info_index, CHECK_0);
3217     nest_members->at_put(index++, class_info_index);
3218   }
3219   assert(index == size, "wrong size");
3220 
3221   // Restore buffer's current position.
3222   cfs->set_current(current_mark);
3223 
3224   return length;
3225 }
3226 
3227 u2 ClassFileParser::parse_classfile_permitted_subtypes_attribute(const ClassFileStream* const cfs,
3228                                                            const u1* const permitted_subtypes_attribute_start,
3229                                                            TRAPS) {
3230   const u1* const current_mark = cfs->current();
3231   u2 length = 0;
3232   if (permitted_subtypes_attribute_start != NULL) {
3233     cfs->set_current(permitted_subtypes_attribute_start);
3234     cfs->guarantee_more(2, CHECK_0);  // length
3235     length = cfs->get_u2_fast();
3236   }
3237   const int size = length;
3238   Array<u2>* const permitted_subtypes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3239   _permitted_subtypes = permitted_subtypes;
3240 
3241   int index = 0;
3242   cfs->guarantee_more(2 * length, CHECK_0);
3243   for (int n = 0; n < length; n++) {
3244     const u2 class_info_index = cfs->get_u2_fast();
3245     check_property(
3246       valid_klass_reference_at(class_info_index),
3247       "Permitted subtype class_info_index %u has bad constant type in class file %s",
3248       class_info_index, CHECK_0);
3249     permitted_subtypes->at_put(index++, class_info_index);
3250   }
3251   assert(index == size, "wrong size");
3252 
3253   // Restore buffer's current position.
3254   cfs->set_current(current_mark);
3255 
3256   return length;
3257 }
3258 
3259 void ClassFileParser::parse_classfile_record_attribute(const ClassFileStream* const cfs,
3260                                                            const u1* const record_attribute_start,
3261                                                            ConstantPool* cp,
3262                                                            int* const record_params_count_ptr,
3263                                                            TRAPS) {
3264   assert(NULL == _record_params, "invariant");
3265 
3266   const u1* const current_mark = cfs->current();
3267   int num_of_params = 0;
3268   if (record_attribute_start != NULL) {
3269     cfs->set_current(record_attribute_start);
3270     cfs->guarantee_more(2, CHECK);  // length
3271     num_of_params = (int)cfs->get_u2_fast();
3272     // DEBUG
3273     // tty->print_cr("this record has %d parameters", num_of_params);
3274   }
3275 
3276   *record_params_count_ptr = num_of_params;
3277 
3278   ResourceMark rm(THREAD);
3279   u2* const record_params_array = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
3280                                               u2,
3281                                               num_of_params * (RecordParamInfo::param_slots + 1));
3282   for (int n = 0; n < num_of_params; n++) {
3283     cfs->guarantee_more(RecordParamInfo::param_slots, CHECK);
3284 
3285     const u2 method_ref_index = cfs->get_u2_fast();
3286     //check_property(valid_symbol_at(method_ref_index),
3287     //  "Invalid constant pool index %u for record parameter name in class file %s",
3288     //  method_ref_index, CHECK);
3289     //const Symbol* const method_ref = cp->symbol_at(method_ref_index);
3290     // we will need a way to verify that the symbol is correct
3291     // verify_legal_field_name(name, CHECK);
3292     // DEBUG
3293     // tty->print_cr("name read %s", name->as_klass_external_name());
3294 
3295     RecordParamInfo* const record_param_info = RecordParamInfo::from_record_params_array(record_params_array, n);
3296     record_param_info->initialize(method_ref_index);
3297   }
3298 
3299   assert(NULL == _record_params, "invariant");
3300 
3301   _record_params = MetadataFactory::new_array<u2>(_loader_data,
3302                                      num_of_params * RecordParamInfo::param_slots,
3303                                      CHECK);
3304   {
3305     int i = 0;
3306     for (; i < num_of_params * RecordParamInfo::param_slots; i++) {
3307       _record_params->at_put(i, record_params_array[i]);
3308     }
3309     assert(_record_params->length() == i, "");
3310     // DEBUG
3311     // tty->print_cr("length of the _record_params array %d for class %s", i, _class_name->as_klass_external_name());
3312   }
3313 
3314   // Restore buffer's current position.
3315   cfs->set_current(current_mark);
3316 }
3317 
3318 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3319   set_class_synthetic_flag(true);
3320 }
3321 
3322 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3323   assert(cfs != NULL, "invariant");
3324 
3325   const u2 signature_index = cfs->get_u2(CHECK);
3326   check_property(
3327     valid_symbol_at(signature_index),
3328     "Invalid constant pool index %u in Signature attribute in class file %s",
3329     signature_index, CHECK);
3330   set_class_generic_signature_index(signature_index);
3331 }
3332 
3333 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3334                                                                   ConstantPool* cp,
3335                                                                   u4 attribute_byte_length,
3336                                                                   TRAPS) {
3337   assert(cfs != NULL, "invariant");
3338   assert(cp != NULL, "invariant");
3339 
3340   const u1* const current_start = cfs->current();
3341 
3342   guarantee_property(attribute_byte_length >= sizeof(u2),
3343                      "Invalid BootstrapMethods attribute length %u in class file %s",
3344                      attribute_byte_length,
3345                      CHECK);
3346 
3347   cfs->guarantee_more(attribute_byte_length, CHECK);
3348 
3349   const int attribute_array_length = cfs->get_u2_fast();
3350 
3351   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3352                      "Short length on BootstrapMethods in class file %s",
3353                      CHECK);
3354 
3355 
3356   // The attribute contains a counted array of counted tuples of shorts,
3357   // represending bootstrap specifiers:
3358   //    length*{bootstrap_method_index, argument_count*{argument_index}}
3359   const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3360   // operand_count = number of shorts in attr, except for leading length
3361 
3362   // The attribute is copied into a short[] array.
3363   // The array begins with a series of short[2] pairs, one for each tuple.
3364   const int index_size = (attribute_array_length * 2);
3365 
3366   Array<u2>* const operands =
3367     MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3368 
3369   // Eagerly assign operands so they will be deallocated with the constant
3370   // pool if there is an error.
3371   cp->set_operands(operands);
3372 
3373   int operand_fill_index = index_size;
3374   const int cp_size = cp->length();
3375 
3376   for (int n = 0; n < attribute_array_length; n++) {
3377     // Store a 32-bit offset into the header of the operand array.
3378     ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3379 
3380     // Read a bootstrap specifier.
3381     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
3382     const u2 bootstrap_method_index = cfs->get_u2_fast();
3383     const u2 argument_count = cfs->get_u2_fast();
3384     check_property(
3385       valid_cp_range(bootstrap_method_index, cp_size) &&
3386       cp->tag_at(bootstrap_method_index).is_method_handle(),
3387       "bootstrap_method_index %u has bad constant type in class file %s",
3388       bootstrap_method_index,
3389       CHECK);
3390 
3391     guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3392       "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3393       CHECK);
3394 
3395     operands->at_put(operand_fill_index++, bootstrap_method_index);
3396     operands->at_put(operand_fill_index++, argument_count);
3397 
3398     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
3399     for (int j = 0; j < argument_count; j++) {
3400       const u2 argument_index = cfs->get_u2_fast();
3401       check_property(
3402         valid_cp_range(argument_index, cp_size) &&
3403         cp->tag_at(argument_index).is_loadable_constant(),
3404         "argument_index %u has bad constant type in class file %s",
3405         argument_index,
3406         CHECK);
3407       operands->at_put(operand_fill_index++, argument_index);
3408     }
3409   }
3410   guarantee_property(current_start + attribute_byte_length == cfs->current(),
3411                      "Bad length on BootstrapMethods in class file %s",
3412                      CHECK);
3413 }
3414 
3415 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3416                                                  ConstantPool* cp,
3417                  ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3418                                                  TRAPS) {
3419   assert(cfs != NULL, "invariant");
3420   assert(cp != NULL, "invariant");
3421   assert(parsed_annotations != NULL, "invariant");
3422 
3423   // Set inner classes attribute to default sentinel
3424   _inner_classes = Universe::the_empty_short_array();
3425   // Set nest members attribute to default sentinel
3426   _nest_members = Universe::the_empty_short_array();
3427   // Set _permitted_subtypes attribute to default sentinel
3428   _permitted_subtypes = Universe::the_empty_short_array();
3429   // Set record params to default sentinel
3430   _record_params = Universe::the_empty_short_array();
3431   cfs->guarantee_more(2, CHECK);  // attributes_count
3432   u2 attributes_count = cfs->get_u2_fast();
3433   bool parsed_sourcefile_attribute = false;
3434   bool parsed_innerclasses_attribute = false;
3435   bool parsed_nest_members_attribute = false;
3436   bool parsed_permitted_subtypes_attribute = false;
3437   bool parsed_nest_host_attribute = false;
3438   bool parsed_record_attribute = false;
3439   bool parsed_enclosingmethod_attribute = false;
3440   bool parsed_bootstrap_methods_attribute = false;
3441   const u1* runtime_visible_annotations = NULL;
3442   int runtime_visible_annotations_length = 0;
3443   const u1* runtime_invisible_annotations = NULL;
3444   int runtime_invisible_annotations_length = 0;
3445   const u1* runtime_visible_type_annotations = NULL;
3446   int runtime_visible_type_annotations_length = 0;
3447   const u1* runtime_invisible_type_annotations = NULL;
3448   int runtime_invisible_type_annotations_length = 0;
3449   bool runtime_invisible_type_annotations_exists = false;
3450   bool runtime_invisible_annotations_exists = false;
3451   bool parsed_source_debug_ext_annotations_exist = false;
3452   const u1* inner_classes_attribute_start = NULL;
3453   u4  inner_classes_attribute_length = 0;
3454   u2  enclosing_method_class_index = 0;
3455   u2  enclosing_method_method_index = 0;
3456   const u1* nest_members_attribute_start = NULL;
3457   u4  nest_members_attribute_length = 0;
3458   const u1* record_attribute_start = NULL;
3459   u4  record_attribute_length = 0;
3460   const u1* permitted_subtypes_attribute_start = NULL;
3461   u4  permitted_subtypes_attribute_length = 0;
3462 
3463   // Iterate over attributes
3464   while (attributes_count--) {
3465     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
3466     const u2 attribute_name_index = cfs->get_u2_fast();
3467     const u4 attribute_length = cfs->get_u4_fast();
3468     check_property(
3469       valid_symbol_at(attribute_name_index),
3470       "Attribute name has bad constant pool index %u in class file %s",
3471       attribute_name_index, CHECK);
3472     const Symbol* const tag = cp->symbol_at(attribute_name_index);
3473     if (tag == vmSymbols::tag_source_file()) {
3474       // Check for SourceFile tag
3475       if (_need_verify) {
3476         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3477       }
3478       if (parsed_sourcefile_attribute) {
3479         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3480       } else {
3481         parsed_sourcefile_attribute = true;
3482       }
3483       parse_classfile_sourcefile_attribute(cfs, CHECK);
3484     } else if (tag == vmSymbols::tag_source_debug_extension()) {
3485       // Check for SourceDebugExtension tag
3486       if (parsed_source_debug_ext_annotations_exist) {
3487           classfile_parse_error(
3488             "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3489       }
3490       parsed_source_debug_ext_annotations_exist = true;
3491       parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3492     } else if (tag == vmSymbols::tag_inner_classes()) {
3493       // Check for InnerClasses tag
3494       if (parsed_innerclasses_attribute) {
3495         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3496       } else {
3497         parsed_innerclasses_attribute = true;
3498       }
3499       inner_classes_attribute_start = cfs->current();
3500       inner_classes_attribute_length = attribute_length;
3501       cfs->skip_u1(inner_classes_attribute_length, CHECK);
3502     } else if (tag == vmSymbols::tag_synthetic()) {
3503       // Check for Synthetic tag
3504       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3505       if (attribute_length != 0) {
3506         classfile_parse_error(
3507           "Invalid Synthetic classfile attribute length %u in class file %s",
3508           attribute_length, CHECK);
3509       }
3510       parse_classfile_synthetic_attribute(CHECK);
3511     } else if (tag == vmSymbols::tag_deprecated()) {
3512       // Check for Deprecatd tag - 4276120
3513       if (attribute_length != 0) {
3514         classfile_parse_error(
3515           "Invalid Deprecated classfile attribute length %u in class file %s",
3516           attribute_length, CHECK);
3517       }
3518     } else if (_major_version >= JAVA_1_5_VERSION) {
3519       if (tag == vmSymbols::tag_signature()) {
3520         if (_generic_signature_index != 0) {
3521           classfile_parse_error(
3522             "Multiple Signature attributes in class file %s", CHECK);
3523         }
3524         if (attribute_length != 2) {
3525           classfile_parse_error(
3526             "Wrong Signature attribute length %u in class file %s",
3527             attribute_length, CHECK);
3528         }
3529         parse_classfile_signature_attribute(cfs, CHECK);
3530       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3531         if (runtime_visible_annotations != NULL) {
3532           classfile_parse_error(
3533             "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3534         }
3535         runtime_visible_annotations_length = attribute_length;
3536         runtime_visible_annotations = cfs->current();
3537         assert(runtime_visible_annotations != NULL, "null visible annotations");
3538         cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3539         parse_annotations(cp,
3540                           runtime_visible_annotations,
3541                           runtime_visible_annotations_length,
3542                           parsed_annotations,
3543                           _loader_data,
3544                           CHECK);
3545         cfs->skip_u1_fast(runtime_visible_annotations_length);
3546       } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3547         if (runtime_invisible_annotations_exists) {
3548           classfile_parse_error(
3549             "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3550         }
3551         runtime_invisible_annotations_exists = true;
3552         if (PreserveAllAnnotations) {
3553           runtime_invisible_annotations_length = attribute_length;
3554           runtime_invisible_annotations = cfs->current();
3555           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3556         }
3557         cfs->skip_u1(attribute_length, CHECK);
3558       } else if (tag == vmSymbols::tag_enclosing_method()) {
3559         if (parsed_enclosingmethod_attribute) {
3560           classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3561         } else {
3562           parsed_enclosingmethod_attribute = true;
3563         }
3564         guarantee_property(attribute_length == 4,
3565           "Wrong EnclosingMethod attribute length %u in class file %s",
3566           attribute_length, CHECK);
3567         cfs->guarantee_more(4, CHECK);  // class_index, method_index
3568         enclosing_method_class_index  = cfs->get_u2_fast();
3569         enclosing_method_method_index = cfs->get_u2_fast();
3570         if (enclosing_method_class_index == 0) {
3571           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3572         }
3573         // Validate the constant pool indices and types
3574         check_property(valid_klass_reference_at(enclosing_method_class_index),
3575           "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3576         if (enclosing_method_method_index != 0 &&
3577             (!cp->is_within_bounds(enclosing_method_method_index) ||
3578              !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3579           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3580         }
3581       } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3582                  _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3583         if (parsed_bootstrap_methods_attribute) {
3584           classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3585         }
3586         parsed_bootstrap_methods_attribute = true;
3587         parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3588       } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3589         if (runtime_visible_type_annotations != NULL) {
3590           classfile_parse_error(
3591             "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3592         }
3593         runtime_visible_type_annotations_length = attribute_length;
3594         runtime_visible_type_annotations = cfs->current();
3595         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3596         // No need for the VM to parse Type annotations
3597         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3598       } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3599         if (runtime_invisible_type_annotations_exists) {
3600           classfile_parse_error(
3601             "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3602         } else {
3603           runtime_invisible_type_annotations_exists = true;
3604         }
3605         if (PreserveAllAnnotations) {
3606           runtime_invisible_type_annotations_length = attribute_length;
3607           runtime_invisible_type_annotations = cfs->current();
3608           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3609         }
3610         cfs->skip_u1(attribute_length, CHECK);
3611       } else if (_major_version >= JAVA_11_VERSION) {
3612         if (tag == vmSymbols::tag_nest_members()) {
3613           // Check for NestMembers tag
3614           if (parsed_nest_members_attribute) {
3615             classfile_parse_error("Multiple NestMembers attributes in class file %s", CHECK);
3616           } else {
3617             parsed_nest_members_attribute = true;
3618           }
3619           if (parsed_nest_host_attribute) {
3620             classfile_parse_error("Conflicting NestHost and NestMembers attributes in class file %s", CHECK);
3621           }
3622           nest_members_attribute_start = cfs->current();
3623           nest_members_attribute_length = attribute_length;
3624           cfs->skip_u1(nest_members_attribute_length, CHECK);
3625         } else if (tag == vmSymbols::tag_nest_host()) {
3626           if (parsed_nest_host_attribute) {
3627             classfile_parse_error("Multiple NestHost attributes in class file %s", CHECK);
3628           } else {
3629             parsed_nest_host_attribute = true;
3630           }
3631           if (parsed_nest_members_attribute) {
3632             classfile_parse_error("Conflicting NestMembers and NestHost attributes in class file %s", CHECK);
3633           }
3634           if (_need_verify) {
3635             guarantee_property(attribute_length == 2, "Wrong NestHost attribute length in class file %s", CHECK);
3636           }
3637           cfs->guarantee_more(2, CHECK);
3638           u2 class_info_index = cfs->get_u2_fast();
3639           check_property(
3640                          valid_klass_reference_at(class_info_index),
3641                          "Nest-host class_info_index %u has bad constant type in class file %s",
3642                          class_info_index, CHECK);
3643           _nest_host = class_info_index;
3644         } else if (tag == vmSymbols::tag_permitted_subtypes()) {
3645             // Check for PermittedSubtypes tag
3646             if (!_access_flags.is_final()) {
3647                 classfile_parse_error("PermittedSubtypes attribute in non-final class file %s", CHECK);
3648             }
3649             if (parsed_permitted_subtypes_attribute) {
3650               classfile_parse_error("Multiple PermittedSubtypes attributes in class file %s", CHECK);
3651             } else {
3652               parsed_permitted_subtypes_attribute = true;
3653             }
3654             permitted_subtypes_attribute_start = cfs->current();
3655             permitted_subtypes_attribute_length = attribute_length;
3656             cfs->skip_u1(permitted_subtypes_attribute_length, CHECK);
3657         } else if (tag == vmSymbols::tag_record()) {
3658           if (parsed_record_attribute) {
3659             classfile_parse_error("Multiple Record attributes in class file %s", CHECK);
3660           } else {
3661             parsed_record_attribute = true;
3662           }
3663           record_attribute_start = cfs->current();
3664           record_attribute_length = attribute_length;
3665           cfs->skip_u1(record_attribute_length, CHECK);
3666         } else {
3667           // Unknown attribute
3668           cfs->skip_u1(attribute_length, CHECK);
3669         }
3670       } else {
3671         // Unknown attribute
3672         cfs->skip_u1(attribute_length, CHECK);
3673       }
3674     } else {
3675       // Unknown attribute
3676       cfs->skip_u1(attribute_length, CHECK);
3677     }
3678   }
3679   _annotations = assemble_annotations(runtime_visible_annotations,
3680                                       runtime_visible_annotations_length,
3681                                       runtime_invisible_annotations,
3682                                       runtime_invisible_annotations_length,
3683                                       CHECK);
3684   _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3685                                            runtime_visible_type_annotations_length,
3686                                            runtime_invisible_type_annotations,
3687                                            runtime_invisible_type_annotations_length,
3688                                            CHECK);
3689 
3690   if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3691     const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3692                             cfs,
3693                             inner_classes_attribute_start,
3694                             parsed_innerclasses_attribute,
3695                             enclosing_method_class_index,
3696                             enclosing_method_method_index,
3697                             CHECK);
3698     if (parsed_innerclasses_attribute && _need_verify && _major_version >= JAVA_1_5_VERSION) {
3699       guarantee_property(
3700         inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3701         "Wrong InnerClasses attribute length in class file %s", CHECK);
3702     }
3703   }
3704 
3705   if (parsed_nest_members_attribute) {
3706     const u2 num_of_classes = parse_classfile_nest_members_attribute(
3707                             cfs,
3708                             nest_members_attribute_start,
3709                             CHECK);
3710     if (_need_verify) {
3711       guarantee_property(
3712         nest_members_attribute_length == sizeof(num_of_classes) + sizeof(u2) * num_of_classes,
3713         "Wrong NestMembers attribute length in class file %s", CHECK);
3714     }
3715   }
3716 
3717   if (parsed_record_attribute) {
3718     parse_classfile_record_attribute(
3719                             cfs,
3720                             record_attribute_start,
3721                             cp,
3722                             &_record_params_count,
3723                             CHECK);
3724   }
3725 
3726   if (parsed_permitted_subtypes_attribute) {
3727     const u2 num_of_subtypes = parse_classfile_permitted_subtypes_attribute(
3728                             cfs,
3729                             permitted_subtypes_attribute_start,
3730                             CHECK);
3731     if (_need_verify) {
3732       guarantee_property(
3733         permitted_subtypes_attribute_length == sizeof(num_of_subtypes) + sizeof(u2) * num_of_subtypes,
3734         "Wrong PermittedSubtypes attribute length in class file %s", CHECK);
3735     }
3736   }
3737 
3738   if (_max_bootstrap_specifier_index >= 0) {
3739     guarantee_property(parsed_bootstrap_methods_attribute,
3740                        "Missing BootstrapMethods attribute in class file %s", CHECK);
3741   }
3742 }
3743 
3744 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3745   assert(k != NULL, "invariant");
3746 
3747   if (_synthetic_flag)
3748     k->set_is_synthetic();
3749   if (_sourcefile_index != 0) {
3750     k->set_source_file_name_index(_sourcefile_index);
3751   }
3752   if (_generic_signature_index != 0) {
3753     k->set_generic_signature_index(_generic_signature_index);
3754   }
3755   if (_sde_buffer != NULL) {
3756     k->set_source_debug_extension(_sde_buffer, _sde_length);
3757   }
3758 }
3759 
3760 // Create the Annotations object that will
3761 // hold the annotations array for the Klass.
3762 void ClassFileParser::create_combined_annotations(TRAPS) {
3763     if (_annotations == NULL &&
3764         _type_annotations == NULL &&
3765         _fields_annotations == NULL &&
3766         _fields_type_annotations == NULL) {
3767       // Don't create the Annotations object unnecessarily.
3768       return;
3769     }
3770 
3771     Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3772     annotations->set_class_annotations(_annotations);
3773     annotations->set_class_type_annotations(_type_annotations);
3774     annotations->set_fields_annotations(_fields_annotations);
3775     annotations->set_fields_type_annotations(_fields_type_annotations);
3776 
3777     // This is the Annotations object that will be
3778     // assigned to InstanceKlass being constructed.
3779     _combined_annotations = annotations;
3780 
3781     // The annotations arrays below has been transfered the
3782     // _combined_annotations so these fields can now be cleared.
3783     _annotations             = NULL;
3784     _type_annotations        = NULL;
3785     _fields_annotations      = NULL;
3786     _fields_type_annotations = NULL;
3787 }
3788 
3789 // Transfer ownership of metadata allocated to the InstanceKlass.
3790 void ClassFileParser::apply_parsed_class_metadata(
3791                                             InstanceKlass* this_klass,
3792                                             int java_fields_count,
3793                                             int record_params_count, TRAPS) {
3794   assert(this_klass != NULL, "invariant");
3795 
3796   _cp->set_pool_holder(this_klass);
3797   this_klass->set_constants(_cp);
3798   this_klass->set_fields(_fields, java_fields_count);
3799   this_klass->set_methods(_methods);
3800   this_klass->set_inner_classes(_inner_classes);
3801   this_klass->set_nest_members(_nest_members);
3802   this_klass->set_nest_host_index(_nest_host);
3803   this_klass->set_local_interfaces(_local_interfaces);
3804   this_klass->set_annotations(_combined_annotations);
3805   this_klass->set_record_params(_record_params, record_params_count);
3806   this_klass->set_permitted_subtypes(_permitted_subtypes);
3807   // Delay the setting of _transitive_interfaces until after initialize_supers() in
3808   // fill_instance_klass(). It is because the _transitive_interfaces may be shared with
3809   // its _super. If an OOM occurs while loading the current klass, its _super field
3810   // may not have been set. When GC tries to free the klass, the _transitive_interfaces
3811   // may be deallocated mistakenly in InstanceKlass::deallocate_interfaces(). Subsequent
3812   // dereferences to the deallocated _transitive_interfaces will result in a crash.
3813 
3814   // Clear out these fields so they don't get deallocated by the destructor
3815   clear_class_metadata();
3816 }
3817 
3818 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3819                                                        int runtime_visible_annotations_length,
3820                                                        const u1* const runtime_invisible_annotations,
3821                                                        int runtime_invisible_annotations_length,
3822                                                        TRAPS) {
3823   AnnotationArray* annotations = NULL;
3824   if (runtime_visible_annotations != NULL ||
3825       runtime_invisible_annotations != NULL) {
3826     annotations = MetadataFactory::new_array<u1>(_loader_data,
3827                                           runtime_visible_annotations_length +
3828                                           runtime_invisible_annotations_length,
3829                                           CHECK_(annotations));
3830     if (runtime_visible_annotations != NULL) {
3831       for (int i = 0; i < runtime_visible_annotations_length; i++) {
3832         annotations->at_put(i, runtime_visible_annotations[i]);
3833       }
3834     }
3835     if (runtime_invisible_annotations != NULL) {
3836       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3837         int append = runtime_visible_annotations_length+i;
3838         annotations->at_put(append, runtime_invisible_annotations[i]);
3839       }
3840     }
3841   }
3842   return annotations;
3843 }
3844 
3845 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3846                                                         const int super_class_index,
3847                                                         const bool need_verify,
3848                                                         TRAPS) {
3849   assert(cp != NULL, "invariant");
3850   const InstanceKlass* super_klass = NULL;
3851 
3852   if (super_class_index == 0) {
3853     check_property(_class_name == vmSymbols::java_lang_Object(),
3854                    "Invalid superclass index %u in class file %s",
3855                    super_class_index,
3856                    CHECK_NULL);
3857   } else {
3858     check_property(valid_klass_reference_at(super_class_index),
3859                    "Invalid superclass index %u in class file %s",
3860                    super_class_index,
3861                    CHECK_NULL);
3862     // The class name should be legal because it is checked when parsing constant pool.
3863     // However, make sure it is not an array type.
3864     bool is_array = false;
3865     if (cp->tag_at(super_class_index).is_klass()) {
3866       super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3867       if (need_verify)
3868         is_array = super_klass->is_array_klass();
3869     } else if (need_verify) {
3870       is_array = (cp->klass_name_at(super_class_index)->char_at(0) == JVM_SIGNATURE_ARRAY);
3871     }
3872     if (need_verify) {
3873       guarantee_property(!is_array,
3874                         "Bad superclass name in class file %s", CHECK_NULL);
3875     }
3876   }
3877   return super_klass;
3878 }
3879 
3880 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3881                                           unsigned int nonstatic_oop_map_count,
3882                                           int first_nonstatic_oop_offset) {
3883 
3884   unsigned int map_count =
3885     NULL == super ? 0 : super->nonstatic_oop_map_count();
3886   if (nonstatic_oop_map_count > 0) {
3887     // We have oops to add to map
3888     if (map_count == 0) {
3889       map_count = nonstatic_oop_map_count;
3890     }
3891     else {
3892       // Check whether we should add a new map block or whether the last one can
3893       // be extended
3894       const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3895       const OopMapBlock* const last_map = first_map + map_count - 1;
3896 
3897       const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3898       if (next_offset == first_nonstatic_oop_offset) {
3899         // There is no gap bettwen superklass's last oop field and first
3900         // local oop field, merge maps.
3901         nonstatic_oop_map_count -= 1;
3902       }
3903       else {
3904         // Superklass didn't end with a oop field, add extra maps
3905         assert(next_offset < first_nonstatic_oop_offset, "just checking");
3906       }
3907       map_count += nonstatic_oop_map_count;
3908     }
3909   }
3910   return map_count;
3911 }
3912 
3913 #ifndef PRODUCT
3914 static void print_field_layout(const Symbol* name,
3915                                Array<u2>* fields,
3916                                const constantPoolHandle& cp,
3917                                int instance_size,
3918                                int instance_fields_start,
3919                                int instance_fields_end,
3920                                int static_fields_end) {
3921 
3922   assert(name != NULL, "invariant");
3923 
3924   tty->print("%s: field layout\n", name->as_klass_external_name());
3925   tty->print("  @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3926   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3927     if (!fs.access_flags().is_static()) {
3928       tty->print("  @%3d \"%s\" %s\n",
3929         fs.offset(),
3930         fs.name()->as_klass_external_name(),
3931         fs.signature()->as_klass_external_name());
3932     }
3933   }
3934   tty->print("  @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3935   tty->print("  @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3936   tty->print("  @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3937   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3938     if (fs.access_flags().is_static()) {
3939       tty->print("  @%3d \"%s\" %s\n",
3940         fs.offset(),
3941         fs.name()->as_klass_external_name(),
3942         fs.signature()->as_klass_external_name());
3943     }
3944   }
3945   tty->print("  @%3d %s\n", static_fields_end, "--- static fields end ---");
3946   tty->print("\n");
3947 }
3948 #endif
3949 
3950 // Values needed for oopmap and InstanceKlass creation
3951 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3952  public:
3953   int*          nonstatic_oop_offsets;
3954   unsigned int* nonstatic_oop_counts;
3955   unsigned int  nonstatic_oop_map_count;
3956   unsigned int  total_oop_map_count;
3957   int           instance_size;
3958   int           nonstatic_field_size;
3959   int           static_field_size;
3960   bool          has_nonstatic_fields;
3961 };
3962 
3963 // Layout fields and fill in FieldLayoutInfo.  Could use more refactoring!
3964 void ClassFileParser::layout_fields(ConstantPool* cp,
3965                                     const FieldAllocationCount* fac,
3966                                     const ClassAnnotationCollector* parsed_annotations,
3967                                     FieldLayoutInfo* info,
3968                                     TRAPS) {
3969 
3970   assert(cp != NULL, "invariant");
3971 
3972   // Field size and offset computation
3973   int nonstatic_field_size = _super_klass == NULL ? 0 :
3974                                _super_klass->nonstatic_field_size();
3975 
3976   // Count the contended fields by type.
3977   //
3978   // We ignore static fields, because @Contended is not supported for them.
3979   // The layout code below will also ignore the static fields.
3980   int nonstatic_contended_count = 0;
3981   FieldAllocationCount fac_contended;
3982   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3983     FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3984     if (fs.is_contended()) {
3985       fac_contended.count[atype]++;
3986       if (!fs.access_flags().is_static()) {
3987         nonstatic_contended_count++;
3988       }
3989     }
3990   }
3991 
3992 
3993   // Calculate the starting byte offsets
3994   int next_static_oop_offset    = InstanceMirrorKlass::offset_of_static_fields();
3995   int next_static_double_offset = next_static_oop_offset +
3996                                       ((fac->count[STATIC_OOP]) * heapOopSize);
3997   if (fac->count[STATIC_DOUBLE]) {
3998     next_static_double_offset = align_up(next_static_double_offset, BytesPerLong);
3999   }
4000 
4001   int next_static_word_offset   = next_static_double_offset +
4002                                     ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
4003   int next_static_short_offset  = next_static_word_offset +
4004                                     ((fac->count[STATIC_WORD]) * BytesPerInt);
4005   int next_static_byte_offset   = next_static_short_offset +
4006                                   ((fac->count[STATIC_SHORT]) * BytesPerShort);
4007 
4008   int nonstatic_fields_start  = instanceOopDesc::base_offset_in_bytes() +
4009                                 nonstatic_field_size * heapOopSize;
4010 
4011   int next_nonstatic_field_offset = nonstatic_fields_start;
4012 
4013   const bool is_contended_class     = parsed_annotations->is_contended();
4014 
4015   // Class is contended, pad before all the fields
4016   if (is_contended_class) {
4017     next_nonstatic_field_offset += ContendedPaddingWidth;
4018   }
4019 
4020   // Compute the non-contended fields count.
4021   // The packing code below relies on these counts to determine if some field
4022   // can be squeezed into the alignment gap. Contended fields are obviously
4023   // exempt from that.
4024   unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
4025   unsigned int nonstatic_word_count   = fac->count[NONSTATIC_WORD]   - fac_contended.count[NONSTATIC_WORD];
4026   unsigned int nonstatic_short_count  = fac->count[NONSTATIC_SHORT]  - fac_contended.count[NONSTATIC_SHORT];
4027   unsigned int nonstatic_byte_count   = fac->count[NONSTATIC_BYTE]   - fac_contended.count[NONSTATIC_BYTE];
4028   unsigned int nonstatic_oop_count    = fac->count[NONSTATIC_OOP]    - fac_contended.count[NONSTATIC_OOP];
4029 
4030   // Total non-static fields count, including every contended field
4031   unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
4032                                         fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
4033                                         fac->count[NONSTATIC_OOP];
4034 
4035   const bool super_has_nonstatic_fields =
4036           (_super_klass != NULL && _super_klass->has_nonstatic_fields());
4037   const bool has_nonstatic_fields =
4038     super_has_nonstatic_fields || (nonstatic_fields_count != 0);
4039 
4040 
4041   // Prepare list of oops for oop map generation.
4042   //
4043   // "offset" and "count" lists are describing the set of contiguous oop
4044   // regions. offset[i] is the start of the i-th region, which then has
4045   // count[i] oops following. Before we know how many regions are required,
4046   // we pessimistically allocate the maps to fit all the oops into the
4047   // distinct regions.
4048   //
4049   // TODO: We add +1 to always allocate non-zero resource arrays; we need
4050   // to figure out if we still need to do this.
4051   unsigned int nonstatic_oop_map_count = 0;
4052   unsigned int max_nonstatic_oop_maps  = fac->count[NONSTATIC_OOP] + 1;
4053 
4054   int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
4055             THREAD, int, max_nonstatic_oop_maps);
4056   unsigned int* const nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
4057             THREAD, unsigned int, max_nonstatic_oop_maps);
4058 
4059   int first_nonstatic_oop_offset = 0; // will be set for first oop field
4060 
4061   bool compact_fields   = CompactFields;
4062   int allocation_style = FieldsAllocationStyle;
4063   if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
4064     assert(false, "0 <= FieldsAllocationStyle <= 2");
4065     allocation_style = 1; // Optimistic
4066   }
4067 
4068   // The next classes have predefined hard-coded fields offsets
4069   // (see in JavaClasses::compute_hard_coded_offsets()).
4070   // Use default fields allocation order for them.
4071   if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
4072       (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
4073        _class_name == vmSymbols::java_lang_Class() ||
4074        _class_name == vmSymbols::java_lang_ClassLoader() ||
4075        _class_name == vmSymbols::java_lang_ref_Reference() ||
4076        _class_name == vmSymbols::java_lang_ref_SoftReference() ||
4077        _class_name == vmSymbols::java_lang_StackTraceElement() ||
4078        _class_name == vmSymbols::java_lang_String() ||
4079        _class_name == vmSymbols::java_lang_Throwable() ||
4080        _class_name == vmSymbols::java_lang_Boolean() ||
4081        _class_name == vmSymbols::java_lang_Character() ||
4082        _class_name == vmSymbols::java_lang_Float() ||
4083        _class_name == vmSymbols::java_lang_Double() ||
4084        _class_name == vmSymbols::java_lang_Byte() ||
4085        _class_name == vmSymbols::java_lang_Short() ||
4086        _class_name == vmSymbols::java_lang_Integer() ||
4087        _class_name == vmSymbols::java_lang_Long())) {
4088     allocation_style = 0;     // Allocate oops first
4089     compact_fields   = false; // Don't compact fields
4090   }
4091 
4092   int next_nonstatic_oop_offset = 0;
4093   int next_nonstatic_double_offset = 0;
4094 
4095   // Rearrange fields for a given allocation style
4096   if( allocation_style == 0 ) {
4097     // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
4098     next_nonstatic_oop_offset    = next_nonstatic_field_offset;
4099     next_nonstatic_double_offset = next_nonstatic_oop_offset +
4100                                     (nonstatic_oop_count * heapOopSize);
4101   } else if( allocation_style == 1 ) {
4102     // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
4103     next_nonstatic_double_offset = next_nonstatic_field_offset;
4104   } else if( allocation_style == 2 ) {
4105     // Fields allocation: oops fields in super and sub classes are together.
4106     if( nonstatic_field_size > 0 && _super_klass != NULL &&
4107         _super_klass->nonstatic_oop_map_size() > 0 ) {
4108       const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
4109       const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
4110       const OopMapBlock* const last_map = first_map + map_count - 1;
4111       const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
4112       if (next_offset == next_nonstatic_field_offset) {
4113         allocation_style = 0;   // allocate oops first
4114         next_nonstatic_oop_offset    = next_nonstatic_field_offset;
4115         next_nonstatic_double_offset = next_nonstatic_oop_offset +
4116                                        (nonstatic_oop_count * heapOopSize);
4117       }
4118     }
4119     if( allocation_style == 2 ) {
4120       allocation_style = 1;     // allocate oops last
4121       next_nonstatic_double_offset = next_nonstatic_field_offset;
4122     }
4123   } else {
4124     ShouldNotReachHere();
4125   }
4126 
4127   int nonstatic_oop_space_count   = 0;
4128   int nonstatic_word_space_count  = 0;
4129   int nonstatic_short_space_count = 0;
4130   int nonstatic_byte_space_count  = 0;
4131   int nonstatic_oop_space_offset = 0;
4132   int nonstatic_word_space_offset = 0;
4133   int nonstatic_short_space_offset = 0;
4134   int nonstatic_byte_space_offset = 0;
4135 
4136   // Try to squeeze some of the fields into the gaps due to
4137   // long/double alignment.
4138   if (nonstatic_double_count > 0) {
4139     int offset = next_nonstatic_double_offset;
4140     next_nonstatic_double_offset = align_up(offset, BytesPerLong);
4141     if (compact_fields && offset != next_nonstatic_double_offset) {
4142       // Allocate available fields into the gap before double field.
4143       int length = next_nonstatic_double_offset - offset;
4144       assert(length == BytesPerInt, "");
4145       nonstatic_word_space_offset = offset;
4146       if (nonstatic_word_count > 0) {
4147         nonstatic_word_count      -= 1;
4148         nonstatic_word_space_count = 1; // Only one will fit
4149         length -= BytesPerInt;
4150         offset += BytesPerInt;
4151       }
4152       nonstatic_short_space_offset = offset;
4153       while (length >= BytesPerShort && nonstatic_short_count > 0) {
4154         nonstatic_short_count       -= 1;
4155         nonstatic_short_space_count += 1;
4156         length -= BytesPerShort;
4157         offset += BytesPerShort;
4158       }
4159       nonstatic_byte_space_offset = offset;
4160       while (length > 0 && nonstatic_byte_count > 0) {
4161         nonstatic_byte_count       -= 1;
4162         nonstatic_byte_space_count += 1;
4163         length -= 1;
4164       }
4165       // Allocate oop field in the gap if there are no other fields for that.
4166       nonstatic_oop_space_offset = offset;
4167       if (length >= heapOopSize && nonstatic_oop_count > 0 &&
4168           allocation_style != 0) { // when oop fields not first
4169         nonstatic_oop_count      -= 1;
4170         nonstatic_oop_space_count = 1; // Only one will fit
4171         length -= heapOopSize;
4172         offset += heapOopSize;
4173       }
4174     }
4175   }
4176 
4177   int next_nonstatic_word_offset = next_nonstatic_double_offset +
4178                                      (nonstatic_double_count * BytesPerLong);
4179   int next_nonstatic_short_offset = next_nonstatic_word_offset +
4180                                       (nonstatic_word_count * BytesPerInt);
4181   int next_nonstatic_byte_offset = next_nonstatic_short_offset +
4182                                      (nonstatic_short_count * BytesPerShort);
4183   int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
4184                                        nonstatic_byte_count;
4185 
4186   // let oops jump before padding with this allocation style
4187   if( allocation_style == 1 ) {
4188     next_nonstatic_oop_offset = next_nonstatic_padded_offset;
4189     if( nonstatic_oop_count > 0 ) {
4190       next_nonstatic_oop_offset = align_up(next_nonstatic_oop_offset, heapOopSize);
4191     }
4192     next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
4193   }
4194 
4195   // Iterate over fields again and compute correct offsets.
4196   // The field allocation type was temporarily stored in the offset slot.
4197   // oop fields are located before non-oop fields (static and non-static).
4198   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4199 
4200     // skip already laid out fields
4201     if (fs.is_offset_set()) continue;
4202 
4203     // contended instance fields are handled below
4204     if (fs.is_contended() && !fs.access_flags().is_static()) continue;
4205 
4206     int real_offset = 0;
4207     const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
4208 
4209     // pack the rest of the fields
4210     switch (atype) {
4211       case STATIC_OOP:
4212         real_offset = next_static_oop_offset;
4213         next_static_oop_offset += heapOopSize;
4214         break;
4215       case STATIC_BYTE:
4216         real_offset = next_static_byte_offset;
4217         next_static_byte_offset += 1;
4218         break;
4219       case STATIC_SHORT:
4220         real_offset = next_static_short_offset;
4221         next_static_short_offset += BytesPerShort;
4222         break;
4223       case STATIC_WORD:
4224         real_offset = next_static_word_offset;
4225         next_static_word_offset += BytesPerInt;
4226         break;
4227       case STATIC_DOUBLE:
4228         real_offset = next_static_double_offset;
4229         next_static_double_offset += BytesPerLong;
4230         break;
4231       case NONSTATIC_OOP:
4232         if( nonstatic_oop_space_count > 0 ) {
4233           real_offset = nonstatic_oop_space_offset;
4234           nonstatic_oop_space_offset += heapOopSize;
4235           nonstatic_oop_space_count  -= 1;
4236         } else {
4237           real_offset = next_nonstatic_oop_offset;
4238           next_nonstatic_oop_offset += heapOopSize;
4239         }
4240 
4241         // Record this oop in the oop maps
4242         if( nonstatic_oop_map_count > 0 &&
4243             nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4244             real_offset -
4245             int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4246             heapOopSize ) {
4247           // This oop is adjacent to the previous one, add to current oop map
4248           assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4249           nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4250         } else {
4251           // This oop is not adjacent to the previous one, create new oop map
4252           assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4253           nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4254           nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4255           nonstatic_oop_map_count += 1;
4256           if( first_nonstatic_oop_offset == 0 ) { // Undefined
4257             first_nonstatic_oop_offset = real_offset;
4258           }
4259         }
4260         break;
4261       case NONSTATIC_BYTE:
4262         if( nonstatic_byte_space_count > 0 ) {
4263           real_offset = nonstatic_byte_space_offset;
4264           nonstatic_byte_space_offset += 1;
4265           nonstatic_byte_space_count  -= 1;
4266         } else {
4267           real_offset = next_nonstatic_byte_offset;
4268           next_nonstatic_byte_offset += 1;
4269         }
4270         break;
4271       case NONSTATIC_SHORT:
4272         if( nonstatic_short_space_count > 0 ) {
4273           real_offset = nonstatic_short_space_offset;
4274           nonstatic_short_space_offset += BytesPerShort;
4275           nonstatic_short_space_count  -= 1;
4276         } else {
4277           real_offset = next_nonstatic_short_offset;
4278           next_nonstatic_short_offset += BytesPerShort;
4279         }
4280         break;
4281       case NONSTATIC_WORD:
4282         if( nonstatic_word_space_count > 0 ) {
4283           real_offset = nonstatic_word_space_offset;
4284           nonstatic_word_space_offset += BytesPerInt;
4285           nonstatic_word_space_count  -= 1;
4286         } else {
4287           real_offset = next_nonstatic_word_offset;
4288           next_nonstatic_word_offset += BytesPerInt;
4289         }
4290         break;
4291       case NONSTATIC_DOUBLE:
4292         real_offset = next_nonstatic_double_offset;
4293         next_nonstatic_double_offset += BytesPerLong;
4294         break;
4295       default:
4296         ShouldNotReachHere();
4297     }
4298     fs.set_offset(real_offset);
4299   }
4300 
4301 
4302   // Handle the contended cases.
4303   //
4304   // Each contended field should not intersect the cache line with another contended field.
4305   // In the absence of alignment information, we end up with pessimistically separating
4306   // the fields with full-width padding.
4307   //
4308   // Additionally, this should not break alignment for the fields, so we round the alignment up
4309   // for each field.
4310   if (nonstatic_contended_count > 0) {
4311 
4312     // if there is at least one contended field, we need to have pre-padding for them
4313     next_nonstatic_padded_offset += ContendedPaddingWidth;
4314 
4315     // collect all contended groups
4316     ResourceBitMap bm(cp->size());
4317     for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4318       // skip already laid out fields
4319       if (fs.is_offset_set()) continue;
4320 
4321       if (fs.is_contended()) {
4322         bm.set_bit(fs.contended_group());
4323       }
4324     }
4325 
4326     int current_group = -1;
4327     while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
4328 
4329       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
4330 
4331         // skip already laid out fields
4332         if (fs.is_offset_set()) continue;
4333 
4334         // skip non-contended fields and fields from different group
4335         if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
4336 
4337         // handle statics below
4338         if (fs.access_flags().is_static()) continue;
4339 
4340         int real_offset = 0;
4341         FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4342 
4343         switch (atype) {
4344           case NONSTATIC_BYTE:
4345             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, 1);
4346             real_offset = next_nonstatic_padded_offset;
4347             next_nonstatic_padded_offset += 1;
4348             break;
4349 
4350           case NONSTATIC_SHORT:
4351             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerShort);
4352             real_offset = next_nonstatic_padded_offset;
4353             next_nonstatic_padded_offset += BytesPerShort;
4354             break;
4355 
4356           case NONSTATIC_WORD:
4357             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerInt);
4358             real_offset = next_nonstatic_padded_offset;
4359             next_nonstatic_padded_offset += BytesPerInt;
4360             break;
4361 
4362           case NONSTATIC_DOUBLE:
4363             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, BytesPerLong);
4364             real_offset = next_nonstatic_padded_offset;
4365             next_nonstatic_padded_offset += BytesPerLong;
4366             break;
4367 
4368           case NONSTATIC_OOP:
4369             next_nonstatic_padded_offset = align_up(next_nonstatic_padded_offset, heapOopSize);
4370             real_offset = next_nonstatic_padded_offset;
4371             next_nonstatic_padded_offset += heapOopSize;
4372 
4373             // Record this oop in the oop maps
4374             if( nonstatic_oop_map_count > 0 &&
4375                 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4376                 real_offset -
4377                 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4378                 heapOopSize ) {
4379               // This oop is adjacent to the previous one, add to current oop map
4380               assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4381               nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4382             } else {
4383               // This oop is not adjacent to the previous one, create new oop map
4384               assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4385               nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4386               nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4387               nonstatic_oop_map_count += 1;
4388               if( first_nonstatic_oop_offset == 0 ) { // Undefined
4389                 first_nonstatic_oop_offset = real_offset;
4390               }
4391             }
4392             break;
4393 
4394           default:
4395             ShouldNotReachHere();
4396         }
4397 
4398         if (fs.contended_group() == 0) {
4399           // Contended group defines the equivalence class over the fields:
4400           // the fields within the same contended group are not inter-padded.
4401           // The only exception is default group, which does not incur the
4402           // equivalence, and so requires intra-padding.
4403           next_nonstatic_padded_offset += ContendedPaddingWidth;
4404         }
4405 
4406         fs.set_offset(real_offset);
4407       } // for
4408 
4409       // Start laying out the next group.
4410       // Note that this will effectively pad the last group in the back;
4411       // this is expected to alleviate memory contention effects for
4412       // subclass fields and/or adjacent object.
4413       // If this was the default group, the padding is already in place.
4414       if (current_group != 0) {
4415         next_nonstatic_padded_offset += ContendedPaddingWidth;
4416       }
4417     }
4418 
4419     // handle static fields
4420   }
4421 
4422   // Entire class is contended, pad in the back.
4423   // This helps to alleviate memory contention effects for subclass fields
4424   // and/or adjacent object.
4425   if (is_contended_class) {
4426     next_nonstatic_padded_offset += ContendedPaddingWidth;
4427   }
4428 
4429   int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4430 
4431   int nonstatic_fields_end      = align_up(notaligned_nonstatic_fields_end, heapOopSize);
4432   int instance_end              = align_up(notaligned_nonstatic_fields_end, wordSize);
4433   int static_fields_end         = align_up(next_static_byte_offset, wordSize);
4434 
4435   int static_field_size         = (static_fields_end -
4436                                    InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4437   nonstatic_field_size          = nonstatic_field_size +
4438                                   (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4439 
4440   int instance_size             = align_object_size(instance_end / wordSize);
4441 
4442   assert(instance_size == align_object_size(align_up(
4443          (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4444           wordSize) / wordSize), "consistent layout helper value");
4445 
4446   // Invariant: nonstatic_field end/start should only change if there are
4447   // nonstatic fields in the class, or if the class is contended. We compare
4448   // against the non-aligned value, so that end alignment will not fail the
4449   // assert without actually having the fields.
4450   assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4451          is_contended_class ||
4452          (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4453 
4454   // Number of non-static oop map blocks allocated at end of klass.
4455   const unsigned int total_oop_map_count =
4456     compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4457                           first_nonstatic_oop_offset);
4458 
4459 #ifndef PRODUCT
4460   if (PrintFieldLayout) {
4461     print_field_layout(_class_name,
4462           _fields,
4463           cp,
4464           instance_size,
4465           nonstatic_fields_start,
4466           nonstatic_fields_end,
4467           static_fields_end);
4468   }
4469 
4470 #endif
4471   // Pass back information needed for InstanceKlass creation
4472   info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4473   info->nonstatic_oop_counts = nonstatic_oop_counts;
4474   info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4475   info->total_oop_map_count = total_oop_map_count;
4476   info->instance_size = instance_size;
4477   info->static_field_size = static_field_size;
4478   info->nonstatic_field_size = nonstatic_field_size;
4479   info->has_nonstatic_fields = has_nonstatic_fields;
4480 }
4481 
4482 static void fill_oop_maps(const InstanceKlass* k,
4483                           unsigned int nonstatic_oop_map_count,
4484                           const int* nonstatic_oop_offsets,
4485                           const unsigned int* nonstatic_oop_counts) {
4486 
4487   assert(k != NULL, "invariant");
4488 
4489   OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4490   const InstanceKlass* const super = k->superklass();
4491   const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4492   if (super_count > 0) {
4493     // Copy maps from superklass
4494     OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4495     for (unsigned int i = 0; i < super_count; ++i) {
4496       *this_oop_map++ = *super_oop_map++;
4497     }
4498   }
4499 
4500   if (nonstatic_oop_map_count > 0) {
4501     if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4502       // The counts differ because there is no gap between superklass's last oop
4503       // field and the first local oop field.  Extend the last oop map copied
4504       // from the superklass instead of creating new one.
4505       nonstatic_oop_map_count--;
4506       nonstatic_oop_offsets++;
4507       this_oop_map--;
4508       this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4509       this_oop_map++;
4510     }
4511 
4512     // Add new map blocks, fill them
4513     while (nonstatic_oop_map_count-- > 0) {
4514       this_oop_map->set_offset(*nonstatic_oop_offsets++);
4515       this_oop_map->set_count(*nonstatic_oop_counts++);
4516       this_oop_map++;
4517     }
4518     assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4519            this_oop_map, "sanity");
4520   }
4521 }
4522 
4523 
4524 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4525   assert(ik != NULL, "invariant");
4526 
4527   const Klass* const super = ik->super();
4528 
4529   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4530   // in which case we don't have to register objects as finalizable
4531   if (!_has_empty_finalizer) {
4532     if (_has_finalizer ||
4533         (super != NULL && super->has_finalizer())) {
4534       ik->set_has_finalizer();
4535     }
4536   }
4537 
4538 #ifdef ASSERT
4539   bool f = false;
4540   const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4541                                            vmSymbols::void_method_signature());
4542   if (m != NULL && !m->is_empty_method()) {
4543       f = true;
4544   }
4545 
4546   // Spec doesn't prevent agent from redefinition of empty finalizer.
4547   // Despite the fact that it's generally bad idea and redefined finalizer
4548   // will not work as expected we shouldn't abort vm in this case
4549   if (!ik->has_redefined_this_or_super()) {
4550     assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4551   }
4552 #endif
4553 
4554   // Check if this klass supports the java.lang.Cloneable interface
4555   if (SystemDictionary::Cloneable_klass_loaded()) {
4556     if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4557       ik->set_is_cloneable();
4558     }
4559   }
4560 
4561   // Check if this klass has a vanilla default constructor
4562   if (super == NULL) {
4563     // java.lang.Object has empty default constructor
4564     ik->set_has_vanilla_constructor();
4565   } else {
4566     if (super->has_vanilla_constructor() &&
4567         _has_vanilla_constructor) {
4568       ik->set_has_vanilla_constructor();
4569     }
4570 #ifdef ASSERT
4571     bool v = false;
4572     if (super->has_vanilla_constructor()) {
4573       const Method* const constructor =
4574         ik->find_method(vmSymbols::object_initializer_name(),
4575                        vmSymbols::void_method_signature());
4576       if (constructor != NULL && constructor->is_vanilla_constructor()) {
4577         v = true;
4578       }
4579     }
4580     assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4581 #endif
4582   }
4583 
4584   // If it cannot be fast-path allocated, set a bit in the layout helper.
4585   // See documentation of InstanceKlass::can_be_fastpath_allocated().
4586   assert(ik->size_helper() > 0, "layout_helper is initialized");
4587   if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4588       || ik->is_abstract() || ik->is_interface()
4589       || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4590       || ik->size_helper() >= FastAllocateSizeLimit) {
4591     // Forbid fast-path allocation.
4592     const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4593     ik->set_layout_helper(lh);
4594   }
4595 }
4596 
4597 // utility methods for appending an array with check for duplicates
4598 
4599 static void append_interfaces(GrowableArray<InstanceKlass*>* result,
4600                               const Array<InstanceKlass*>* const ifs) {
4601   // iterate over new interfaces
4602   for (int i = 0; i < ifs->length(); i++) {
4603     InstanceKlass* const e = ifs->at(i);
4604     assert(e->is_klass() && e->is_interface(), "just checking");
4605     // add new interface
4606     result->append_if_missing(e);
4607   }
4608 }
4609 
4610 static Array<InstanceKlass*>* compute_transitive_interfaces(const InstanceKlass* super,
4611                                                             Array<InstanceKlass*>* local_ifs,
4612                                                             ClassLoaderData* loader_data,
4613                                                             TRAPS) {
4614   assert(local_ifs != NULL, "invariant");
4615   assert(loader_data != NULL, "invariant");
4616 
4617   // Compute maximum size for transitive interfaces
4618   int max_transitive_size = 0;
4619   int super_size = 0;
4620   // Add superclass transitive interfaces size
4621   if (super != NULL) {
4622     super_size = super->transitive_interfaces()->length();
4623     max_transitive_size += super_size;
4624   }
4625   // Add local interfaces' super interfaces
4626   const int local_size = local_ifs->length();
4627   for (int i = 0; i < local_size; i++) {
4628     InstanceKlass* const l = local_ifs->at(i);
4629     max_transitive_size += l->transitive_interfaces()->length();
4630   }
4631   // Finally add local interfaces
4632   max_transitive_size += local_size;
4633   // Construct array
4634   if (max_transitive_size == 0) {
4635     // no interfaces, use canonicalized array
4636     return Universe::the_empty_instance_klass_array();
4637   } else if (max_transitive_size == super_size) {
4638     // no new local interfaces added, share superklass' transitive interface array
4639     return super->transitive_interfaces();
4640   } else if (max_transitive_size == local_size) {
4641     // only local interfaces added, share local interface array
4642     return local_ifs;
4643   } else {
4644     ResourceMark rm;
4645     GrowableArray<InstanceKlass*>* const result = new GrowableArray<InstanceKlass*>(max_transitive_size);
4646 
4647     // Copy down from superclass
4648     if (super != NULL) {
4649       append_interfaces(result, super->transitive_interfaces());
4650     }
4651 
4652     // Copy down from local interfaces' superinterfaces
4653     for (int i = 0; i < local_size; i++) {
4654       InstanceKlass* const l = local_ifs->at(i);
4655       append_interfaces(result, l->transitive_interfaces());
4656     }
4657     // Finally add local interfaces
4658     append_interfaces(result, local_ifs);
4659 
4660     // length will be less than the max_transitive_size if duplicates were removed
4661     const int length = result->length();
4662     assert(length <= max_transitive_size, "just checking");
4663     Array<InstanceKlass*>* const new_result =
4664       MetadataFactory::new_array<InstanceKlass*>(loader_data, length, CHECK_NULL);
4665     for (int i = 0; i < length; i++) {
4666       InstanceKlass* const e = result->at(i);
4667       assert(e != NULL, "just checking");
4668       new_result->at_put(i, e);
4669     }
4670     return new_result;
4671   }
4672 }
4673 
4674 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4675   assert(this_klass != NULL, "invariant");
4676   const Klass* const super = this_klass->super();
4677   if (super != NULL) {
4678 
4679     // If the loader is not the boot loader then throw an exception if its
4680     // superclass is in package jdk.internal.reflect and its loader is not a
4681     // special reflection class loader
4682     if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4683       assert(super->is_instance_klass(), "super is not instance klass");
4684       PackageEntry* super_package = super->package();
4685       if (super_package != NULL &&
4686           super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4687           !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4688         ResourceMark rm(THREAD);
4689         Exceptions::fthrow(
4690           THREAD_AND_LOCATION,
4691           vmSymbols::java_lang_IllegalAccessError(),
4692           "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4693           this_klass->external_name(),
4694           this_klass->class_loader_data()->loader_name_and_id(),
4695           super->external_name());
4696         return;
4697       }
4698     }
4699 
4700     Reflection::VerifyClassAccessResults vca_result =
4701       Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4702     if (vca_result != Reflection::ACCESS_OK) {
4703       ResourceMark rm(THREAD);
4704       char* msg = Reflection::verify_class_access_msg(this_klass,
4705                                                       InstanceKlass::cast(super),
4706                                                       vca_result);
4707       if (msg == NULL) {
4708         bool same_module = (this_klass->module() == super->module());
4709         Exceptions::fthrow(
4710           THREAD_AND_LOCATION,
4711           vmSymbols::java_lang_IllegalAccessError(),
4712           "class %s cannot access its %ssuperclass %s (%s%s%s)",
4713           this_klass->external_name(),
4714           super->is_abstract() ? "abstract " : "",
4715           super->external_name(),
4716           (same_module) ? this_klass->joint_in_module_of_loader(super) : this_klass->class_in_module_of_loader(),
4717           (same_module) ? "" : "; ",
4718           (same_module) ? "" : super->class_in_module_of_loader());
4719       } else {
4720         // Add additional message content.
4721         Exceptions::fthrow(
4722           THREAD_AND_LOCATION,
4723           vmSymbols::java_lang_IllegalAccessError(),
4724           "superclass access check failed: %s",
4725           msg);
4726       }
4727     }
4728   }
4729 }
4730 
4731 
4732 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4733   assert(this_klass != NULL, "invariant");
4734   const Array<InstanceKlass*>* const local_interfaces = this_klass->local_interfaces();
4735   const int lng = local_interfaces->length();
4736   for (int i = lng - 1; i >= 0; i--) {
4737     InstanceKlass* const k = local_interfaces->at(i);
4738     assert (k != NULL && k->is_interface(), "invalid interface");
4739     Reflection::VerifyClassAccessResults vca_result =
4740       Reflection::verify_class_access(this_klass, k, false);
4741     if (vca_result != Reflection::ACCESS_OK) {
4742       ResourceMark rm(THREAD);
4743       char* msg = Reflection::verify_class_access_msg(this_klass,
4744                                                       k,
4745                                                       vca_result);
4746       if (msg == NULL) {
4747         bool same_module = (this_klass->module() == k->module());
4748         Exceptions::fthrow(
4749           THREAD_AND_LOCATION,
4750           vmSymbols::java_lang_IllegalAccessError(),
4751           "class %s cannot access its superinterface %s (%s%s%s)",
4752           this_klass->external_name(),
4753           k->external_name(),
4754           (same_module) ? this_klass->joint_in_module_of_loader(k) : this_klass->class_in_module_of_loader(),
4755           (same_module) ? "" : "; ",
4756           (same_module) ? "" : k->class_in_module_of_loader());
4757       } else {
4758         // Add additional message content.
4759         Exceptions::fthrow(
4760           THREAD_AND_LOCATION,
4761           vmSymbols::java_lang_IllegalAccessError(),
4762           "superinterface check failed: %s",
4763           msg);
4764       }
4765     }
4766   }
4767 }
4768 
4769 
4770 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4771   assert(this_klass != NULL, "invariant");
4772   const Array<Method*>* const methods = this_klass->methods();
4773   const int num_methods = methods->length();
4774 
4775   // go thru each method and check if it overrides a final method
4776   for (int index = 0; index < num_methods; index++) {
4777     const Method* const m = methods->at(index);
4778 
4779     // skip private, static, and <init> methods
4780     if ((!m->is_private() && !m->is_static()) &&
4781         (m->name() != vmSymbols::object_initializer_name())) {
4782 
4783       const Symbol* const name = m->name();
4784       const Symbol* const signature = m->signature();
4785       const Klass* k = this_klass->super();
4786       const Method* super_m = NULL;
4787       while (k != NULL) {
4788         // skip supers that don't have final methods.
4789         if (k->has_final_method()) {
4790           // lookup a matching method in the super class hierarchy
4791           super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4792           if (super_m == NULL) {
4793             break; // didn't find any match; get out
4794           }
4795 
4796           if (super_m->is_final() && !super_m->is_static() &&
4797               !super_m->access_flags().is_private()) {
4798             // matching method in super is final, and not static or private
4799             bool can_access = Reflection::verify_member_access(this_klass,
4800                                                                super_m->method_holder(),
4801                                                                super_m->method_holder(),
4802                                                                super_m->access_flags(),
4803                                                               false, false, CHECK);
4804             if (can_access) {
4805               // this class can access super final method and therefore override
4806               ResourceMark rm(THREAD);
4807               Exceptions::fthrow(THREAD_AND_LOCATION,
4808                                  vmSymbols::java_lang_VerifyError(),
4809                                  "class %s overrides final method %s.%s%s",
4810                                  this_klass->external_name(),
4811                                  super_m->method_holder()->external_name(),
4812                                  name->as_C_string(),
4813                                  signature->as_C_string()
4814                                  );
4815               return;
4816             }
4817           }
4818 
4819           // continue to look from super_m's holder's super.
4820           k = super_m->method_holder()->super();
4821           continue;
4822         }
4823 
4824         k = k->super();
4825       }
4826     }
4827   }
4828 }
4829 
4830 
4831 // assumes that this_klass is an interface
4832 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4833   assert(this_klass != NULL, "invariant");
4834   assert(this_klass->is_interface(), "not an interface");
4835   const Array<Method*>* methods = this_klass->methods();
4836   const int num_methods = methods->length();
4837 
4838   for (int index = 0; index < num_methods; index++) {
4839     const Method* const m = methods->at(index);
4840     // if m is static and not the init method, throw a verify error
4841     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4842       ResourceMark rm(THREAD);
4843       Exceptions::fthrow(
4844         THREAD_AND_LOCATION,
4845         vmSymbols::java_lang_VerifyError(),
4846         "Illegal static method %s in interface %s",
4847         m->name()->as_C_string(),
4848         this_klass->external_name()
4849       );
4850       return;
4851     }
4852   }
4853 }
4854 
4855 // utility methods for format checking
4856 
4857 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4858   const bool is_module = (flags & JVM_ACC_MODULE) != 0;
4859   assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
4860   if (is_module) {
4861     ResourceMark rm(THREAD);
4862     Exceptions::fthrow(
4863       THREAD_AND_LOCATION,
4864       vmSymbols::java_lang_NoClassDefFoundError(),
4865       "%s is not a class because access_flag ACC_MODULE is set",
4866       _class_name->as_C_string());
4867     return;
4868   }
4869 
4870   if (!_need_verify) { return; }
4871 
4872   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
4873   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
4874   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
4875   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
4876   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
4877   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4878   const bool major_gte_1_5 = _major_version >= JAVA_1_5_VERSION;
4879   const bool major_gte_12  = _major_version >= JAVA_12_VERSION;
4880 
4881   if ((is_abstract && is_final && !major_gte_12) ||
4882       (is_interface && !is_abstract && !major_gte_12) ||
4883       (is_interface && major_gte_1_5 && (is_super || is_enum)) ||
4884       (!is_interface && major_gte_1_5 && is_annotation)) {
4885     ResourceMark rm(THREAD);
4886     Exceptions::fthrow(
4887       THREAD_AND_LOCATION,
4888       vmSymbols::java_lang_ClassFormatError(),
4889       "Illegal class modifiers in class %s: 0x%X",
4890       _class_name->as_C_string(), flags
4891     );
4892     return;
4893   }
4894 }
4895 
4896 static bool has_illegal_visibility(jint flags) {
4897   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4898   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4899   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4900 
4901   return ((is_public && is_protected) ||
4902           (is_public && is_private) ||
4903           (is_protected && is_private));
4904 }
4905 
4906 // A legal major_version.minor_version must be one of the following:
4907 //
4908 //  Major_version >= 45 and major_version < 56, any minor_version.
4909 //  Major_version >= 56 and major_version <= JVM_CLASSFILE_MAJOR_VERSION and minor_version = 0.
4910 //  Major_version = JVM_CLASSFILE_MAJOR_VERSION and minor_version = 65535 and --enable-preview is present.
4911 //
4912 static void verify_class_version(u2 major, u2 minor, Symbol* class_name, TRAPS){
4913   ResourceMark rm(THREAD);
4914   const u2 max_version = JVM_CLASSFILE_MAJOR_VERSION;
4915   if (major < JAVA_MIN_SUPPORTED_VERSION) {
4916     Exceptions::fthrow(
4917       THREAD_AND_LOCATION,
4918       vmSymbols::java_lang_UnsupportedClassVersionError(),
4919       "%s (class file version %u.%u) was compiled with an invalid major version",
4920       class_name->as_C_string(), major, minor);
4921     return;
4922   }
4923 
4924   if (major > max_version) {
4925     Exceptions::fthrow(
4926       THREAD_AND_LOCATION,
4927       vmSymbols::java_lang_UnsupportedClassVersionError(),
4928       "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
4929       "this version of the Java Runtime only recognizes class file versions up to %u.0",
4930       class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION);
4931     return;
4932   }
4933 
4934   if (major < JAVA_12_VERSION || minor == 0) {
4935     return;
4936   }
4937 
4938   if (minor == JAVA_PREVIEW_MINOR_VERSION) {
4939     if (major != max_version) {
4940       Exceptions::fthrow(
4941         THREAD_AND_LOCATION,
4942         vmSymbols::java_lang_UnsupportedClassVersionError(),
4943         "%s (class file version %u.%u) was compiled with preview features that are unsupported. "
4944         "This version of the Java Runtime only recognizes preview features for class file version %u.%u",
4945         class_name->as_C_string(), major, minor, JVM_CLASSFILE_MAJOR_VERSION, JAVA_PREVIEW_MINOR_VERSION);
4946       return;
4947     }
4948 
4949     if (!Arguments::enable_preview()) {
4950       Exceptions::fthrow(
4951         THREAD_AND_LOCATION,
4952         vmSymbols::java_lang_UnsupportedClassVersionError(),
4953         "Preview features are not enabled for %s (class file version %u.%u). Try running with '--enable-preview'",
4954         class_name->as_C_string(), major, minor);
4955       return;
4956     }
4957 
4958   } else { // minor != JAVA_PREVIEW_MINOR_VERSION
4959     Exceptions::fthrow(
4960         THREAD_AND_LOCATION,
4961         vmSymbols::java_lang_UnsupportedClassVersionError(),
4962         "%s (class file version %u.%u) was compiled with an invalid non-zero minor version",
4963         class_name->as_C_string(), major, minor);
4964   }
4965 }
4966 
4967 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4968                                                    bool is_interface,
4969                                                    TRAPS) const {
4970   if (!_need_verify) { return; }
4971 
4972   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4973   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4974   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4975   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
4976   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
4977   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
4978   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4979   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
4980   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4981 
4982   bool is_illegal = false;
4983 
4984   if (is_interface) {
4985     if (!is_public || !is_static || !is_final || is_private ||
4986         is_protected || is_volatile || is_transient ||
4987         (major_gte_15 && is_enum)) {
4988       is_illegal = true;
4989     }
4990   } else { // not interface
4991     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4992       is_illegal = true;
4993     }
4994   }
4995 
4996   if (is_illegal) {
4997     ResourceMark rm(THREAD);
4998     Exceptions::fthrow(
4999       THREAD_AND_LOCATION,
5000       vmSymbols::java_lang_ClassFormatError(),
5001       "Illegal field modifiers in class %s: 0x%X",
5002       _class_name->as_C_string(), flags);
5003     return;
5004   }
5005 }
5006 
5007 void ClassFileParser::verify_legal_method_modifiers(jint flags,
5008                                                     bool is_interface,
5009                                                     const Symbol* name,
5010                                                     TRAPS) const {
5011   if (!_need_verify) { return; }
5012 
5013   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
5014   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
5015   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
5016   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
5017   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
5018   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
5019   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
5020   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
5021   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
5022   const bool is_protected    = (flags & JVM_ACC_PROTECTED)    != 0;
5023   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
5024   const bool major_gte_8     = _major_version >= JAVA_8_VERSION;
5025   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
5026 
5027   bool is_illegal = false;
5028 
5029   if (is_interface) {
5030     if (major_gte_8) {
5031       // Class file version is JAVA_8_VERSION or later Methods of
5032       // interfaces may set any of the flags except ACC_PROTECTED,
5033       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
5034       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
5035       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
5036           (is_native || is_protected || is_final || is_synchronized) ||
5037           // If a specific method of a class or interface has its
5038           // ACC_ABSTRACT flag set, it must not have any of its
5039           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
5040           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
5041           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
5042           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
5043           (is_abstract && (is_private || is_static || is_strict))) {
5044         is_illegal = true;
5045       }
5046     } else if (major_gte_15) {
5047       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
5048       if (!is_public || is_private || is_protected || is_static || is_final ||
5049           is_synchronized || is_native || !is_abstract || is_strict) {
5050         is_illegal = true;
5051       }
5052     } else {
5053       // Class file version is pre-JAVA_1_5_VERSION
5054       if (!is_public || is_static || is_final || is_native || !is_abstract) {
5055         is_illegal = true;
5056       }
5057     }
5058   } else { // not interface
5059     if (has_illegal_visibility(flags)) {
5060       is_illegal = true;
5061     } else {
5062       if (is_initializer) {
5063         if (is_static || is_final || is_synchronized || is_native ||
5064             is_abstract || (major_gte_15 && is_bridge)) {
5065           is_illegal = true;
5066         }
5067       } else { // not initializer
5068         if (is_abstract) {
5069           if ((is_final || is_native || is_private || is_static ||
5070               (major_gte_15 && (is_synchronized || is_strict)))) {
5071             is_illegal = true;
5072           }
5073         }
5074       }
5075     }
5076   }
5077 
5078   if (is_illegal) {
5079     ResourceMark rm(THREAD);
5080     Exceptions::fthrow(
5081       THREAD_AND_LOCATION,
5082       vmSymbols::java_lang_ClassFormatError(),
5083       "Method %s in class %s has illegal modifiers: 0x%X",
5084       name->as_C_string(), _class_name->as_C_string(), flags);
5085     return;
5086   }
5087 }
5088 
5089 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
5090                                         int length,
5091                                         TRAPS) const {
5092   assert(_need_verify, "only called when _need_verify is true");
5093   if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
5094     classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5095   }
5096 }
5097 
5098 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5099 // In class names, '/' separates unqualified names.  This is verified in this function also.
5100 // Method names also may not contain the characters '<' or '>', unless <init>
5101 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
5102 // method.  Because these names have been checked as special cases before
5103 // calling this method in verify_legal_method_name.
5104 //
5105 // This method is also called from the modular system APIs in modules.cpp
5106 // to verify the validity of module and package names.
5107 bool ClassFileParser::verify_unqualified_name(const char* name,
5108                                               unsigned int length,
5109                                               int type) {
5110   if (length == 0) return false;  // Must have at least one char.
5111   for (const char* p = name; p != name + length; p++) {
5112     switch(*p) {
5113       case '.':
5114       case ';':
5115       case '[':
5116         // do not permit '.', ';', or '['
5117         return false;
5118       case '/':
5119         // check for '//' or leading or trailing '/' which are not legal
5120         // unqualified name must not be empty
5121         if (type == ClassFileParser::LegalClass) {
5122           if (p == name || p+1 >= name+length || *(p+1) == '/') {
5123             return false;
5124           }
5125         } else {
5126           return false;   // do not permit '/' unless it's class name
5127         }
5128         break;
5129       case '<':
5130       case '>':
5131         // do not permit '<' or '>' in method names
5132         if (type == ClassFileParser::LegalMethod) {
5133           return false;
5134         }
5135     }
5136   }
5137   return true;
5138 }
5139 
5140 // Take pointer to a UTF8 byte string (not NUL-terminated).
5141 // Skip over the longest part of the string that could
5142 // be taken as a fieldname. Allow '/' if slash_ok is true.
5143 // Return a pointer to just past the fieldname.
5144 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5145 // being true, we saw consecutive slashes (meaning we were looking for a
5146 // qualified path but found something that was badly-formed).
5147 static const char* skip_over_field_name(const char* const name,
5148                                         bool slash_ok,
5149                                         unsigned int length) {
5150   const char* p;
5151   jboolean last_is_slash = false;
5152   jboolean not_first_ch = false;
5153 
5154   for (p = name; p != name + length; not_first_ch = true) {
5155     const char* old_p = p;
5156     jchar ch = *p;
5157     if (ch < 128) {
5158       p++;
5159       // quick check for ascii
5160       if ((ch >= 'a' && ch <= 'z') ||
5161         (ch >= 'A' && ch <= 'Z') ||
5162         (ch == '_' || ch == '$') ||
5163         (not_first_ch && ch >= '0' && ch <= '9')) {
5164         last_is_slash = false;
5165         continue;
5166       }
5167       if (slash_ok && ch == '/') {
5168         if (last_is_slash) {
5169           return NULL;  // Don't permit consecutive slashes
5170         }
5171         last_is_slash = true;
5172         continue;
5173       }
5174     }
5175     else {
5176       jint unicode_ch;
5177       char* tmp_p = UTF8::next_character(p, &unicode_ch);
5178       p = tmp_p;
5179       last_is_slash = false;
5180       // Check if ch is Java identifier start or is Java identifier part
5181       // 4672820: call java.lang.Character methods directly without generating separate tables.
5182       EXCEPTION_MARK;
5183       // return value
5184       JavaValue result(T_BOOLEAN);
5185       // Set up the arguments to isJavaIdentifierStart or isJavaIdentifierPart
5186       JavaCallArguments args;
5187       args.push_int(unicode_ch);
5188 
5189       if (not_first_ch) {
5190         // public static boolean isJavaIdentifierPart(char ch);
5191         JavaCalls::call_static(&result,
5192           SystemDictionary::Character_klass(),
5193           vmSymbols::isJavaIdentifierPart_name(),
5194           vmSymbols::int_bool_signature(),
5195           &args,
5196           THREAD);
5197       } else {
5198         // public static boolean isJavaIdentifierStart(char ch);
5199         JavaCalls::call_static(&result,
5200           SystemDictionary::Character_klass(),
5201           vmSymbols::isJavaIdentifierStart_name(),
5202           vmSymbols::int_bool_signature(),
5203           &args,
5204           THREAD);
5205       }
5206       if (HAS_PENDING_EXCEPTION) {
5207         CLEAR_PENDING_EXCEPTION;
5208         return NULL;
5209       }
5210       if(result.get_jboolean()) {
5211         continue;
5212       }
5213     }
5214     return (not_first_ch) ? old_p : NULL;
5215   }
5216   return (not_first_ch) ? p : NULL;
5217 }
5218 
5219 // Take pointer to a UTF8 byte string (not NUL-terminated).
5220 // Skip over the longest part of the string that could
5221 // be taken as a field signature. Allow "void" if void_ok.
5222 // Return a pointer to just past the signature.
5223 // Return NULL if no legal signature is found.
5224 const char* ClassFileParser::skip_over_field_signature(const char* signature,
5225                                                        bool void_ok,
5226                                                        unsigned int length,
5227                                                        TRAPS) const {
5228   unsigned int array_dim = 0;
5229   while (length > 0) {
5230     switch (signature[0]) {
5231     case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5232     case JVM_SIGNATURE_BOOLEAN:
5233     case JVM_SIGNATURE_BYTE:
5234     case JVM_SIGNATURE_CHAR:
5235     case JVM_SIGNATURE_SHORT:
5236     case JVM_SIGNATURE_INT:
5237     case JVM_SIGNATURE_FLOAT:
5238     case JVM_SIGNATURE_LONG:
5239     case JVM_SIGNATURE_DOUBLE:
5240       return signature + 1;
5241     case JVM_SIGNATURE_CLASS: {
5242       if (_major_version < JAVA_1_5_VERSION) {
5243         // Skip over the class name if one is there
5244         const char* const p = skip_over_field_name(signature + 1, true, --length);
5245 
5246         // The next character better be a semicolon
5247         if (p && (p - signature) > 1 && p[0] == ';') {
5248           return p + 1;
5249         }
5250       }
5251       else {
5252         // Skip leading 'L' and ignore first appearance of ';'
5253         signature++;
5254         const char* c = (const char*) memchr(signature, ';', length - 1);
5255         // Format check signature
5256         if (c != NULL) {
5257           int newlen = c - (char*) signature;
5258           bool legal = verify_unqualified_name(signature, newlen, LegalClass);
5259           if (!legal) {
5260             classfile_parse_error("Class name is empty or contains illegal character "
5261                                   "in descriptor in class file %s",
5262                                   CHECK_0);
5263             return NULL;
5264           }
5265           return signature + newlen + 1;
5266         }
5267       }
5268       return NULL;
5269     }
5270     case JVM_SIGNATURE_ARRAY:
5271       array_dim++;
5272       if (array_dim > 255) {
5273         // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5274         classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5275       }
5276       // The rest of what's there better be a legal signature
5277       signature++;
5278       length--;
5279       void_ok = false;
5280       break;
5281     default:
5282       return NULL;
5283     }
5284   }
5285   return NULL;
5286 }
5287 
5288 // Checks if name is a legal class name.
5289 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
5290   if (!_need_verify || _relax_verify) { return; }
5291 
5292   assert(name->refcount() > 0, "symbol must be kept alive");
5293   char* bytes = (char*)name->bytes();
5294   unsigned int length = name->utf8_length();
5295   bool legal = false;
5296 
5297   if (length > 0) {
5298     const char* p;
5299     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5300       p = skip_over_field_signature(bytes, false, length, CHECK);
5301       legal = (p != NULL) && ((p - bytes) == (int)length);
5302     } else if (_major_version < JAVA_1_5_VERSION) {
5303       if (bytes[0] != '<') {
5304         p = skip_over_field_name(bytes, true, length);
5305         legal = (p != NULL) && ((p - bytes) == (int)length);
5306       }
5307     } else {
5308       // 4900761: relax the constraints based on JSR202 spec
5309       // Class names may be drawn from the entire Unicode character set.
5310       // Identifiers between '/' must be unqualified names.
5311       // The utf8 string has been verified when parsing cpool entries.
5312       legal = verify_unqualified_name(bytes, length, LegalClass);
5313     }
5314   }
5315   if (!legal) {
5316     ResourceMark rm(THREAD);
5317     assert(_class_name != NULL, "invariant");
5318     Exceptions::fthrow(
5319       THREAD_AND_LOCATION,
5320       vmSymbols::java_lang_ClassFormatError(),
5321       "Illegal class name \"%.*s\" in class file %s", length, bytes,
5322       _class_name->as_C_string()
5323     );
5324     return;
5325   }
5326 }
5327 
5328 // Checks if name is a legal field name.
5329 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
5330   if (!_need_verify || _relax_verify) { return; }
5331 
5332   char* bytes = (char*)name->bytes();
5333   unsigned int length = name->utf8_length();
5334   bool legal = false;
5335 
5336   if (length > 0) {
5337     if (_major_version < JAVA_1_5_VERSION) {
5338       if (bytes[0] != '<') {
5339         const char* p = skip_over_field_name(bytes, false, length);
5340         legal = (p != NULL) && ((p - bytes) == (int)length);
5341       }
5342     } else {
5343       // 4881221: relax the constraints based on JSR202 spec
5344       legal = verify_unqualified_name(bytes, length, LegalField);
5345     }
5346   }
5347 
5348   if (!legal) {
5349     ResourceMark rm(THREAD);
5350     assert(_class_name != NULL, "invariant");
5351     Exceptions::fthrow(
5352       THREAD_AND_LOCATION,
5353       vmSymbols::java_lang_ClassFormatError(),
5354       "Illegal field name \"%.*s\" in class %s", length, bytes,
5355       _class_name->as_C_string()
5356     );
5357     return;
5358   }
5359 }
5360 
5361 // Checks if name is a legal method name.
5362 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
5363   if (!_need_verify || _relax_verify) { return; }
5364 
5365   assert(name != NULL, "method name is null");
5366   char* bytes = (char*)name->bytes();
5367   unsigned int length = name->utf8_length();
5368   bool legal = false;
5369 
5370   if (length > 0) {
5371     if (bytes[0] == '<') {
5372       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5373         legal = true;
5374       }
5375     } else if (_major_version < JAVA_1_5_VERSION) {
5376       const char* p;
5377       p = skip_over_field_name(bytes, false, length);
5378       legal = (p != NULL) && ((p - bytes) == (int)length);
5379     } else {
5380       // 4881221: relax the constraints based on JSR202 spec
5381       legal = verify_unqualified_name(bytes, length, LegalMethod);
5382     }
5383   }
5384 
5385   if (!legal) {
5386     ResourceMark rm(THREAD);
5387     assert(_class_name != NULL, "invariant");
5388     Exceptions::fthrow(
5389       THREAD_AND_LOCATION,
5390       vmSymbols::java_lang_ClassFormatError(),
5391       "Illegal method name \"%.*s\" in class %s", length, bytes,
5392       _class_name->as_C_string()
5393     );
5394     return;
5395   }
5396 }
5397 
5398 
5399 // Checks if signature is a legal field signature.
5400 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5401                                                    const Symbol* signature,
5402                                                    TRAPS) const {
5403   if (!_need_verify) { return; }
5404 
5405   const char* const bytes = (const char* const)signature->bytes();
5406   const unsigned int length = signature->utf8_length();
5407   const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5408 
5409   if (p == NULL || (p - bytes) != (int)length) {
5410     throwIllegalSignature("Field", name, signature, CHECK);
5411   }
5412 }
5413 
5414 // Checks if signature is a legal method signature.
5415 // Returns number of parameters
5416 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5417                                                    const Symbol* signature,
5418                                                    TRAPS) const {
5419   if (!_need_verify) {
5420     // make sure caller's args_size will be less than 0 even for non-static
5421     // method so it will be recomputed in compute_size_of_parameters().
5422     return -2;
5423   }
5424 
5425   // Class initializers cannot have args for class format version >= 51.
5426   if (name == vmSymbols::class_initializer_name() &&
5427       signature != vmSymbols::void_method_signature() &&
5428       _major_version >= JAVA_7_VERSION) {
5429     throwIllegalSignature("Method", name, signature, CHECK_0);
5430     return 0;
5431   }
5432 
5433   unsigned int args_size = 0;
5434   const char* p = (const char*)signature->bytes();
5435   unsigned int length = signature->utf8_length();
5436   const char* nextp;
5437 
5438   // The first character must be a '('
5439   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5440     length--;
5441     // Skip over legal field signatures
5442     nextp = skip_over_field_signature(p, false, length, CHECK_0);
5443     while ((length > 0) && (nextp != NULL)) {
5444       args_size++;
5445       if (p[0] == 'J' || p[0] == 'D') {
5446         args_size++;
5447       }
5448       length -= nextp - p;
5449       p = nextp;
5450       nextp = skip_over_field_signature(p, false, length, CHECK_0);
5451     }
5452     // The first non-signature thing better be a ')'
5453     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5454       length--;
5455       if (name->utf8_length() > 0 && name->char_at(0) == '<') {
5456         // All internal methods must return void
5457         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5458           return args_size;
5459         }
5460       } else {
5461         // Now we better just have a return value
5462         nextp = skip_over_field_signature(p, true, length, CHECK_0);
5463         if (nextp && ((int)length == (nextp - p))) {
5464           return args_size;
5465         }
5466       }
5467     }
5468   }
5469   // Report error
5470   throwIllegalSignature("Method", name, signature, CHECK_0);
5471   return 0;
5472 }
5473 
5474 int ClassFileParser::static_field_size() const {
5475   assert(_field_info != NULL, "invariant");
5476   return _field_info->static_field_size;
5477 }
5478 
5479 int ClassFileParser::total_oop_map_count() const {
5480   assert(_field_info != NULL, "invariant");
5481   return _field_info->total_oop_map_count;
5482 }
5483 
5484 jint ClassFileParser::layout_size() const {
5485   assert(_field_info != NULL, "invariant");
5486   return _field_info->instance_size;
5487 }
5488 
5489 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5490                                          const Array<Method*>* methods) {
5491   assert(ik != NULL, "invariant");
5492   assert(methods != NULL, "invariant");
5493 
5494   // Set up Method*::intrinsic_id as soon as we know the names of methods.
5495   // (We used to do this lazily, but now we query it in Rewriter,
5496   // which is eagerly done for every method, so we might as well do it now,
5497   // when everything is fresh in memory.)
5498   const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5499 
5500   if (klass_id != vmSymbols::NO_SID) {
5501     for (int j = 0; j < methods->length(); ++j) {
5502       Method* method = methods->at(j);
5503       method->init_intrinsic_id();
5504 
5505       if (CheckIntrinsics) {
5506         // Check if an intrinsic is defined for method 'method',
5507         // but the method is not annotated with @HotSpotIntrinsicCandidate.
5508         if (method->intrinsic_id() != vmIntrinsics::_none &&
5509             !method->intrinsic_candidate()) {
5510               tty->print("Compiler intrinsic is defined for method [%s], "
5511               "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5512               method->name_and_sig_as_C_string(),
5513               NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5514             );
5515           tty->cr();
5516           DEBUG_ONLY(vm_exit(1));
5517         }
5518         // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5519         // but there is no intrinsic available for it.
5520         if (method->intrinsic_candidate() &&
5521           method->intrinsic_id() == vmIntrinsics::_none) {
5522             tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5523               "but no compiler intrinsic is defined for the method.%s",
5524               method->name_and_sig_as_C_string(),
5525               NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5526             );
5527           tty->cr();
5528           DEBUG_ONLY(vm_exit(1));
5529         }
5530       }
5531     } // end for
5532 
5533 #ifdef ASSERT
5534     if (CheckIntrinsics) {
5535       // Check for orphan methods in the current class. A method m
5536       // of a class C is orphan if an intrinsic is defined for method m,
5537       // but class C does not declare m.
5538       // The check is potentially expensive, therefore it is available
5539       // only in debug builds.
5540 
5541       for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5542         if (vmIntrinsics::_compiledLambdaForm == id) {
5543           // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5544           // generated for the JVM from a LambdaForm and therefore no method
5545           // is defined for it.
5546           continue;
5547         }
5548 
5549         if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5550           // Check if the current class contains a method with the same
5551           // name, flags, signature.
5552           bool match = false;
5553           for (int j = 0; j < methods->length(); ++j) {
5554             const Method* method = methods->at(j);
5555             if (method->intrinsic_id() == id) {
5556               match = true;
5557               break;
5558             }
5559           }
5560 
5561           if (!match) {
5562             char buf[1000];
5563             tty->print("Compiler intrinsic is defined for method [%s], "
5564                        "but the method is not available in class [%s].%s",
5565                         vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5566                                                              buf, sizeof(buf)),
5567                         ik->name()->as_C_string(),
5568                         NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5569             );
5570             tty->cr();
5571             DEBUG_ONLY(vm_exit(1));
5572           }
5573         }
5574       } // end for
5575     } // CheckIntrinsics
5576 #endif // ASSERT
5577   }
5578 }
5579 
5580 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5581   if (_klass != NULL) {
5582     return _klass;
5583   }
5584 
5585   InstanceKlass* const ik =
5586     InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5587 
5588   fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5589 
5590   assert(_klass == ik, "invariant");
5591 
5592 
5593   if (ik->should_store_fingerprint()) {
5594     ik->store_fingerprint(_stream->compute_fingerprint());
5595   }
5596 
5597   ik->set_has_passed_fingerprint_check(false);
5598   if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5599     uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5600     uint64_t fp = ik->has_stored_fingerprint() ? ik->get_stored_fingerprint() : _stream->compute_fingerprint();
5601     if (aot_fp != 0 && aot_fp == fp) {
5602       // This class matches with a class saved in an AOT library
5603       ik->set_has_passed_fingerprint_check(true);
5604     } else {
5605       ResourceMark rm;
5606       log_info(class, fingerprint)("%s :  expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5607                                  ik->external_name(), aot_fp, _stream->compute_fingerprint());
5608     }
5609   }
5610 
5611   return ik;
5612 }
5613 
5614 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5615   assert(ik != NULL, "invariant");
5616 
5617   // Set name and CLD before adding to CLD
5618   ik->set_class_loader_data(_loader_data);
5619   ik->set_name(_class_name);
5620 
5621   // Add all classes to our internal class loader list here,
5622   // including classes in the bootstrap (NULL) class loader.
5623   const bool publicize = !is_internal();
5624 
5625   _loader_data->add_class(ik, publicize);
5626 
5627   set_klass_to_deallocate(ik);
5628 
5629   assert(_field_info != NULL, "invariant");
5630   assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5631   assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5632     "sanity");
5633 
5634   assert(ik->is_instance_klass(), "sanity");
5635   assert(ik->size_helper() == _field_info->instance_size, "sanity");
5636 
5637   // Fill in information already parsed
5638   ik->set_should_verify_class(_need_verify);
5639 
5640   // Not yet: supers are done below to support the new subtype-checking fields
5641   ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5642   ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5643   assert(_fac != NULL, "invariant");
5644   ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5645 
5646   // this transfers ownership of a lot of arrays from
5647   // the parser onto the InstanceKlass*
5648   apply_parsed_class_metadata(ik, _java_fields_count, _record_params_count, CHECK);
5649 
5650   // note that is not safe to use the fields in the parser from this point on
5651   assert(NULL == _cp, "invariant");
5652   assert(NULL == _fields, "invariant");
5653   assert(NULL == _methods, "invariant");
5654   assert(NULL == _inner_classes, "invariant");
5655   assert(NULL == _nest_members, "invariant");
5656   assert(NULL == _local_interfaces, "invariant");
5657   assert(NULL == _combined_annotations, "invariant");
5658   assert(NULL == _record_params, "invariant");
5659   assert(NULL == _permitted_subtypes, "invariant");
5660 
5661   if (_has_final_method) {
5662     ik->set_has_final_method();
5663   }
5664 
5665   ik->copy_method_ordering(_method_ordering, CHECK);
5666   // The InstanceKlass::_methods_jmethod_ids cache
5667   // is managed on the assumption that the initial cache
5668   // size is equal to the number of methods in the class. If
5669   // that changes, then InstanceKlass::idnum_can_increment()
5670   // has to be changed accordingly.
5671   ik->set_initial_method_idnum(ik->methods()->length());
5672 
5673   ik->set_this_class_index(_this_class_index);
5674 
5675   if (is_unsafe_anonymous()) {
5676     // _this_class_index is a CONSTANT_Class entry that refers to this
5677     // anonymous class itself. If this class needs to refer to its own methods or
5678     // fields, it would use a CONSTANT_MethodRef, etc, which would reference
5679     // _this_class_index. However, because this class is anonymous (it's
5680     // not stored in SystemDictionary), _this_class_index cannot be resolved
5681     // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
5682     // Therefore, we must eagerly resolve _this_class_index now.
5683     ik->constants()->klass_at_put(_this_class_index, ik);
5684   }
5685 
5686   ik->set_minor_version(_minor_version);
5687   ik->set_major_version(_major_version);
5688   ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5689   ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5690 
5691   if (_unsafe_anonymous_host != NULL) {
5692     assert (ik->is_unsafe_anonymous(), "should be the same");
5693     ik->set_unsafe_anonymous_host(_unsafe_anonymous_host);
5694   }
5695 
5696   // Set PackageEntry for this_klass
5697   oop cl = ik->class_loader();
5698   Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5699   ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5700   ik->set_package(cld, CHECK);
5701 
5702   const Array<Method*>* const methods = ik->methods();
5703   assert(methods != NULL, "invariant");
5704   const int methods_len = methods->length();
5705 
5706   check_methods_for_intrinsics(ik, methods);
5707 
5708   // Fill in field values obtained by parse_classfile_attributes
5709   if (_parsed_annotations->has_any_annotations()) {
5710     _parsed_annotations->apply_to(ik);
5711   }
5712 
5713   apply_parsed_class_attributes(ik);
5714 
5715   // Miranda methods
5716   if ((_num_miranda_methods > 0) ||
5717       // if this class introduced new miranda methods or
5718       (_super_klass != NULL && _super_klass->has_miranda_methods())
5719         // super class exists and this class inherited miranda methods
5720      ) {
5721        ik->set_has_miranda_methods(); // then set a flag
5722   }
5723 
5724   // Fill in information needed to compute superclasses.
5725   ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), _transitive_interfaces, CHECK);
5726   ik->set_transitive_interfaces(_transitive_interfaces);
5727   _transitive_interfaces = NULL;
5728 
5729   // Initialize itable offset tables
5730   klassItable::setup_itable_offset_table(ik);
5731 
5732   // Compute transitive closure of interfaces this class implements
5733   // Do final class setup
5734   fill_oop_maps(ik,
5735                 _field_info->nonstatic_oop_map_count,
5736                 _field_info->nonstatic_oop_offsets,
5737                 _field_info->nonstatic_oop_counts);
5738 
5739   // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5740   set_precomputed_flags(ik);
5741 
5742   // check if this class can access its super class
5743   check_super_class_access(ik, CHECK);
5744 
5745   // check if this class can access its superinterfaces
5746   check_super_interface_access(ik, CHECK);
5747 
5748   // check if this class overrides any final method
5749   check_final_method_override(ik, CHECK);
5750 
5751   // reject static interface methods prior to Java 8
5752   if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5753     check_illegal_static_method(ik, CHECK);
5754   }
5755 
5756   // Obtain this_klass' module entry
5757   ModuleEntry* module_entry = ik->module();
5758   assert(module_entry != NULL, "module_entry should always be set");
5759 
5760   // Obtain java.lang.Module
5761   Handle module_handle(THREAD, module_entry->module());
5762 
5763   // Allocate mirror and initialize static fields
5764   // The create_mirror() call will also call compute_modifiers()
5765   java_lang_Class::create_mirror(ik,
5766                                  Handle(THREAD, _loader_data->class_loader()),
5767                                  module_handle,
5768                                  _protection_domain,
5769                                  CHECK);
5770 
5771   assert(_all_mirandas != NULL, "invariant");
5772 
5773   // Generate any default methods - default methods are public interface methods
5774   // that have a default implementation.  This is new with Java 8.
5775   if (_has_nonstatic_concrete_methods) {
5776     DefaultMethods::generate_default_methods(ik,
5777                                              _all_mirandas,
5778                                              CHECK);
5779   }
5780 
5781   // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5782   if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5783       !module_entry->has_default_read_edges()) {
5784     if (!module_entry->set_has_default_read_edges()) {
5785       // We won a potential race
5786       JvmtiExport::add_default_read_edges(module_handle, THREAD);
5787     }
5788   }
5789 
5790   ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5791 
5792   if (!is_internal()) {
5793     if (log_is_enabled(Info, class, load)) {
5794       ResourceMark rm;
5795       const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5796       ik->print_class_load_logging(_loader_data, module_name, _stream);
5797     }
5798 
5799     if (ik->minor_version() == JAVA_PREVIEW_MINOR_VERSION &&
5800         ik->major_version() == JVM_CLASSFILE_MAJOR_VERSION &&
5801         log_is_enabled(Info, class, preview)) {
5802       ResourceMark rm;
5803       log_info(class, preview)("Loading class %s that depends on preview features (class file version %d.65535)",
5804                                ik->external_name(), JVM_CLASSFILE_MAJOR_VERSION);
5805     }
5806 
5807     if (log_is_enabled(Debug, class, resolve))  {
5808       ResourceMark rm;
5809       // print out the superclass.
5810       const char * from = ik->external_name();
5811       if (ik->java_super() != NULL) {
5812         log_debug(class, resolve)("%s %s (super)",
5813                    from,
5814                    ik->java_super()->external_name());
5815       }
5816       // print out each of the interface classes referred to by this class.
5817       const Array<InstanceKlass*>* const local_interfaces = ik->local_interfaces();
5818       if (local_interfaces != NULL) {
5819         const int length = local_interfaces->length();
5820         for (int i = 0; i < length; i++) {
5821           const InstanceKlass* const k = local_interfaces->at(i);
5822           const char * to = k->external_name();
5823           log_debug(class, resolve)("%s %s (interface)", from, to);
5824         }
5825       }
5826     }
5827   }
5828 
5829   JFR_ONLY(INIT_ID(ik);)
5830 
5831   // If we reach here, all is well.
5832   // Now remove the InstanceKlass* from the _klass_to_deallocate field
5833   // in order for it to not be destroyed in the ClassFileParser destructor.
5834   set_klass_to_deallocate(NULL);
5835 
5836   // it's official
5837   set_klass(ik);
5838 
5839   check_subtyping(CHECK);
5840 
5841   debug_only(ik->verify();)
5842 }
5843 
5844 void ClassFileParser::update_class_name(Symbol* new_class_name) {
5845   // Decrement the refcount in the old name, since we're clobbering it.
5846   _class_name->decrement_refcount();
5847 
5848   _class_name = new_class_name;
5849   // Increment the refcount of the new name.
5850   // Now the ClassFileParser owns this name and will decrement in
5851   // the destructor.
5852   _class_name->increment_refcount();
5853 }
5854 
5855 
5856 // For an unsafe anonymous class that is in the unnamed package, move it to its host class's
5857 // package by prepending its host class's package name to its class name and setting
5858 // its _class_name field.
5859 void ClassFileParser::prepend_host_package_name(const InstanceKlass* unsafe_anonymous_host, TRAPS) {
5860   ResourceMark rm(THREAD);
5861   assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5862          "Unsafe anonymous class should not be in a package");
5863   const char* host_pkg_name =
5864     ClassLoader::package_from_name(unsafe_anonymous_host->name()->as_C_string(), NULL);
5865 
5866   if (host_pkg_name != NULL) {
5867     int host_pkg_len = (int)strlen(host_pkg_name);
5868     int class_name_len = _class_name->utf8_length();
5869     int symbol_len = host_pkg_len + 1 + class_name_len;
5870     char* new_anon_name = NEW_RESOURCE_ARRAY(char, symbol_len + 1);
5871     int n = os::snprintf(new_anon_name, symbol_len + 1, "%s/%.*s",
5872                          host_pkg_name, class_name_len, _class_name->base());
5873     assert(n == symbol_len, "Unexpected number of characters in string");
5874 
5875     // Decrement old _class_name to avoid leaking.
5876     _class_name->decrement_refcount();
5877 
5878     // Create a symbol and update the anonymous class name.
5879     // The new class name is created with a refcount of one. When installed into the InstanceKlass,
5880     // it'll be two and when the ClassFileParser destructor runs, it'll go back to one and get deleted
5881     // when the class is unloaded.
5882     _class_name = SymbolTable::new_symbol(new_anon_name, symbol_len);
5883   }
5884 }
5885 
5886 // If the host class and the anonymous class are in the same package then do
5887 // nothing.  If the anonymous class is in the unnamed package then move it to its
5888 // host's package.  If the classes are in different packages then throw an IAE
5889 // exception.
5890 void ClassFileParser::fix_unsafe_anonymous_class_name(TRAPS) {
5891   assert(_unsafe_anonymous_host != NULL, "Expected an unsafe anonymous class");
5892 
5893   const jbyte* anon_last_slash = UTF8::strrchr((const jbyte*)_class_name->base(),
5894                                                _class_name->utf8_length(), '/');
5895   if (anon_last_slash == NULL) {  // Unnamed package
5896     prepend_host_package_name(_unsafe_anonymous_host, CHECK);
5897   } else {
5898     if (!_unsafe_anonymous_host->is_same_class_package(_unsafe_anonymous_host->class_loader(), _class_name)) {
5899       ResourceMark rm(THREAD);
5900       THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5901         err_msg("Host class %s and anonymous class %s are in different packages",
5902         _unsafe_anonymous_host->name()->as_C_string(), _class_name->as_C_string()));
5903     }
5904   }
5905 }
5906 
5907 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5908   bool trusted = (loader_data->is_the_null_class_loader_data() ||
5909                   SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5910   bool need_verify =
5911     // verifyAll
5912     (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5913     // verifyRemote
5914     (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5915   return !need_verify;
5916 }
5917 
5918 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5919                                  Symbol* name,
5920                                  ClassLoaderData* loader_data,
5921                                  Handle protection_domain,
5922                                  const InstanceKlass* unsafe_anonymous_host,
5923                                  GrowableArray<Handle>* cp_patches,
5924                                  Publicity pub_level,
5925                                  TRAPS) :
5926   _stream(stream),
5927   _requested_name(name),
5928   _class_name(NULL),
5929   _loader_data(loader_data),
5930   _unsafe_anonymous_host(unsafe_anonymous_host),
5931   _cp_patches(cp_patches),
5932   _num_patched_klasses(0),
5933   _max_num_patched_klasses(0),
5934   _orig_cp_size(0),
5935   _first_patched_klass_resolved_index(0),
5936   _super_klass(),
5937   _cp(NULL),
5938   _fields(NULL),
5939   _methods(NULL),
5940   _inner_classes(NULL),
5941   _nest_members(NULL),
5942   _nest_host(0),
5943   _record_params(NULL),
5944   _permitted_subtypes(NULL),
5945   _local_interfaces(NULL),
5946   _transitive_interfaces(NULL),
5947   _combined_annotations(NULL),
5948   _annotations(NULL),
5949   _type_annotations(NULL),
5950   _fields_annotations(NULL),
5951   _fields_type_annotations(NULL),
5952   _klass(NULL),
5953   _klass_to_deallocate(NULL),
5954   _parsed_annotations(NULL),
5955   _fac(NULL),
5956   _field_info(NULL),
5957   _method_ordering(NULL),
5958   _all_mirandas(NULL),
5959   _vtable_size(0),
5960   _itable_size(0),
5961   _num_miranda_methods(0),
5962   _rt(REF_NONE),
5963   _protection_domain(protection_domain),
5964   _access_flags(),
5965   _pub_level(pub_level),
5966   _bad_constant_seen(0),
5967   _synthetic_flag(false),
5968   _sde_length(false),
5969   _sde_buffer(NULL),
5970   _sourcefile_index(0),
5971   _generic_signature_index(0),
5972   _major_version(0),
5973   _minor_version(0),
5974   _this_class_index(0),
5975   _super_class_index(0),
5976   _itfs_len(0),
5977   _java_fields_count(0),
5978   _record_params_count(-1),
5979   _need_verify(false),
5980   _relax_verify(false),
5981   _has_nonstatic_concrete_methods(false),
5982   _declares_nonstatic_concrete_methods(false),
5983   _has_final_method(false),
5984   _has_finalizer(false),
5985   _has_empty_finalizer(false),
5986   _has_vanilla_constructor(false),
5987   _max_bootstrap_specifier_index(-1) {
5988 
5989   _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5990   _class_name->increment_refcount();
5991 
5992   assert(THREAD->is_Java_thread(), "invariant");
5993   assert(_loader_data != NULL, "invariant");
5994   assert(stream != NULL, "invariant");
5995   assert(_stream != NULL, "invariant");
5996   assert(_stream->buffer() == _stream->current(), "invariant");
5997   assert(_class_name != NULL, "invariant");
5998   assert(0 == _access_flags.as_int(), "invariant");
5999 
6000   // Figure out whether we can skip format checking (matching classic VM behavior)
6001   if (DumpSharedSpaces) {
6002     // verify == true means it's a 'remote' class (i.e., non-boot class)
6003     // Verification decision is based on BytecodeVerificationRemote flag
6004     // for those classes.
6005     _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
6006                                               BytecodeVerificationLocal;
6007   }
6008   else {
6009     _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
6010                                                stream->need_verify());
6011   }
6012   if (_cp_patches != NULL) {
6013     int len = _cp_patches->length();
6014     for (int i=0; i<len; i++) {
6015       if (has_cp_patch_at(i)) {
6016         Handle patch = cp_patch_at(i);
6017         if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
6018           // We need to append the names of the patched classes to the end of the constant pool,
6019           // because a patched class may have a Utf8 name that's not already included in the
6020           // original constant pool. These class names are used when patch_constant_pool()
6021           // calls patch_class().
6022           //
6023           // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
6024           // At this point, we don't know the tag for index i yet, because we haven't parsed the
6025           // constant pool. So we can only assume the worst -- every String is used to patch a Class.
6026           _max_num_patched_klasses++;
6027         }
6028       }
6029     }
6030   }
6031 
6032   // synch back verification state to stream
6033   stream->set_verify(_need_verify);
6034 
6035   // Check if verification needs to be relaxed for this class file
6036   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
6037   _relax_verify = relax_format_check_for(_loader_data);
6038 
6039   parse_stream(stream, CHECK);
6040 
6041   post_process_parsed_stream(stream, _cp, CHECK);
6042 }
6043 
6044 void ClassFileParser::clear_class_metadata() {
6045   // metadata created before the instance klass is created.  Must be
6046   // deallocated if classfile parsing returns an error.
6047   _cp = NULL;
6048   _fields = NULL;
6049   _methods = NULL;
6050   _inner_classes = NULL;
6051   _nest_members = NULL;
6052   _permitted_subtypes = NULL;
6053   _local_interfaces = NULL;
6054   _combined_annotations = NULL;
6055   _annotations = _type_annotations = NULL;
6056   _fields_annotations = _fields_type_annotations = NULL;
6057   _record_params = NULL;
6058 }
6059 
6060 // Destructor to clean up
6061 ClassFileParser::~ClassFileParser() {
6062   _class_name->decrement_refcount();
6063 
6064   if (_cp != NULL) {
6065     MetadataFactory::free_metadata(_loader_data, _cp);
6066   }
6067   if (_fields != NULL) {
6068     MetadataFactory::free_array<u2>(_loader_data, _fields);
6069   }
6070 
6071   if (_methods != NULL) {
6072     // Free methods
6073     InstanceKlass::deallocate_methods(_loader_data, _methods);
6074   }
6075 
6076   // beware of the Universe::empty_blah_array!!
6077   if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
6078     MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
6079   }
6080 
6081   if (_nest_members != NULL && _nest_members != Universe::the_empty_short_array()) {
6082     MetadataFactory::free_array<u2>(_loader_data, _nest_members);
6083   }
6084 
6085   if (_record_params != NULL && _record_params != Universe::the_empty_short_array()) {
6086     MetadataFactory::free_array<u2>(_loader_data, _record_params);
6087   }
6088   
6089   if (_permitted_subtypes != NULL && _permitted_subtypes != Universe::the_empty_short_array()) {
6090     MetadataFactory::free_array<u2>(_loader_data, _permitted_subtypes);
6091   }
6092 
6093   // Free interfaces
6094   InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
6095                                        _local_interfaces, _transitive_interfaces);
6096 
6097   if (_combined_annotations != NULL) {
6098     // After all annotations arrays have been created, they are installed into the
6099     // Annotations object that will be assigned to the InstanceKlass being created.
6100 
6101     // Deallocate the Annotations object and the installed annotations arrays.
6102     _combined_annotations->deallocate_contents(_loader_data);
6103 
6104     // If the _combined_annotations pointer is non-NULL,
6105     // then the other annotations fields should have been cleared.
6106     assert(_annotations             == NULL, "Should have been cleared");
6107     assert(_type_annotations        == NULL, "Should have been cleared");
6108     assert(_fields_annotations      == NULL, "Should have been cleared");
6109     assert(_fields_type_annotations == NULL, "Should have been cleared");
6110   } else {
6111     // If the annotations arrays were not installed into the Annotations object,
6112     // then they have to be deallocated explicitly.
6113     MetadataFactory::free_array<u1>(_loader_data, _annotations);
6114     MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
6115     Annotations::free_contents(_loader_data, _fields_annotations);
6116     Annotations::free_contents(_loader_data, _fields_type_annotations);
6117   }
6118 
6119   clear_class_metadata();
6120   _transitive_interfaces = NULL;
6121 
6122   // deallocate the klass if already created.  Don't directly deallocate, but add
6123   // to the deallocate list so that the klass is removed from the CLD::_klasses list
6124   // at a safepoint.
6125   if (_klass_to_deallocate != NULL) {
6126     _loader_data->add_to_deallocate_list(_klass_to_deallocate);
6127   }
6128 }
6129 
6130 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
6131                                    TRAPS) {
6132 
6133   assert(stream != NULL, "invariant");
6134   assert(_class_name != NULL, "invariant");
6135 
6136   // BEGIN STREAM PARSING
6137   stream->guarantee_more(8, CHECK);  // magic, major, minor
6138   // Magic value
6139   const u4 magic = stream->get_u4_fast();
6140   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
6141                      "Incompatible magic value %u in class file %s",
6142                      magic, CHECK);
6143 
6144   // Version numbers
6145   _minor_version = stream->get_u2_fast();
6146   _major_version = stream->get_u2_fast();
6147 
6148   if (DumpSharedSpaces && _major_version < JAVA_6_VERSION) {
6149     ResourceMark rm;
6150     warning("Pre JDK 6 class not supported by CDS: %u.%u %s",
6151             _major_version,  _minor_version, _class_name->as_C_string());
6152     Exceptions::fthrow(
6153       THREAD_AND_LOCATION,
6154       vmSymbols::java_lang_UnsupportedClassVersionError(),
6155       "Unsupported major.minor version for dump time %u.%u",
6156       _major_version,
6157       _minor_version);
6158   }
6159 
6160   // Check version numbers - we check this even with verifier off
6161   verify_class_version(_major_version, _minor_version, _class_name, CHECK);
6162 
6163   stream->guarantee_more(3, CHECK); // length, first cp tag
6164   u2 cp_size = stream->get_u2_fast();
6165 
6166   guarantee_property(
6167     cp_size >= 1, "Illegal constant pool size %u in class file %s",
6168     cp_size, CHECK);
6169 
6170   _orig_cp_size = cp_size;
6171   if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
6172     THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
6173   }
6174   cp_size += _max_num_patched_klasses;
6175 
6176   _cp = ConstantPool::allocate(_loader_data,
6177                                cp_size,
6178                                CHECK);
6179 
6180   ConstantPool* const cp = _cp;
6181 
6182   parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
6183 
6184   assert(cp_size == (const u2)cp->length(), "invariant");
6185 
6186   // ACCESS FLAGS
6187   stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
6188 
6189   // Access flags
6190   jint flags;
6191   // JVM_ACC_MODULE is defined in JDK-9 and later.
6192   if (_major_version >= JAVA_9_VERSION) {
6193     flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
6194   } else {
6195     flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
6196   }
6197 
6198   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
6199     // Set abstract bit for old class files for backward compatibility
6200     flags |= JVM_ACC_ABSTRACT;
6201   }
6202 
6203   verify_legal_class_modifiers(flags, CHECK);
6204 
6205   short bad_constant = class_bad_constant_seen();
6206   if (bad_constant != 0) {
6207     // Do not throw CFE until after the access_flags are checked because if
6208     // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
6209     classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
6210   }
6211 
6212   _access_flags.set_flags(flags);
6213 
6214   // This class and superclass
6215   _this_class_index = stream->get_u2_fast();
6216   check_property(
6217     valid_cp_range(_this_class_index, cp_size) &&
6218       cp->tag_at(_this_class_index).is_unresolved_klass(),
6219     "Invalid this class index %u in constant pool in class file %s",
6220     _this_class_index, CHECK);
6221 
6222   Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
6223   assert(class_name_in_cp != NULL, "class_name can't be null");
6224 
6225   // Update _class_name to reflect the name in the constant pool
6226   update_class_name(class_name_in_cp);
6227 
6228   // Don't need to check whether this class name is legal or not.
6229   // It has been checked when constant pool is parsed.
6230   // However, make sure it is not an array type.
6231   if (_need_verify) {
6232     guarantee_property(_class_name->char_at(0) != JVM_SIGNATURE_ARRAY,
6233                        "Bad class name in class file %s",
6234                        CHECK);
6235   }
6236 
6237   // Checks if name in class file matches requested name
6238   if (_requested_name != NULL && _requested_name != _class_name) {
6239     ResourceMark rm(THREAD);
6240     Exceptions::fthrow(
6241       THREAD_AND_LOCATION,
6242       vmSymbols::java_lang_NoClassDefFoundError(),
6243       "%s (wrong name: %s)",
6244       _class_name->as_C_string(),
6245       _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
6246     );
6247     return;
6248   }
6249 
6250   // if this is an anonymous class fix up its name if it's in the unnamed
6251   // package.  Otherwise, throw IAE if it is in a different package than
6252   // its host class.
6253   if (_unsafe_anonymous_host != NULL) {
6254     fix_unsafe_anonymous_class_name(CHECK);
6255   }
6256 
6257   // Verification prevents us from creating names with dots in them, this
6258   // asserts that that's the case.
6259   assert(is_internal_format(_class_name), "external class name format used internally");
6260 
6261   if (!is_internal()) {
6262     LogTarget(Debug, class, preorder) lt;
6263     if (lt.is_enabled()){
6264       ResourceMark rm(THREAD);
6265       LogStream ls(lt);
6266       ls.print("%s", _class_name->as_klass_external_name());
6267       if (stream->source() != NULL) {
6268         ls.print(" source: %s", stream->source());
6269       }
6270       ls.cr();
6271     }
6272 
6273 #if INCLUDE_CDS
6274     if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
6275       if (!ClassLoader::has_jrt_entry()) {
6276         warning("DumpLoadedClassList and CDS are not supported in exploded build");
6277         DumpLoadedClassList = NULL;
6278       } else if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
6279                  _unsafe_anonymous_host == NULL) {
6280         // Only dump the classes that can be stored into CDS archive.
6281         // Unsafe anonymous classes such as generated LambdaForm classes are also not included.
6282         oop class_loader = _loader_data->class_loader();
6283         ResourceMark rm(THREAD);
6284         bool skip = false;
6285         if (class_loader == NULL || SystemDictionary::is_platform_class_loader(class_loader)) {
6286           // For the boot and platform class loaders, skip classes that are not found in the
6287           // java runtime image, such as those found in the --patch-module entries.
6288           // These classes can't be loaded from the archive during runtime.
6289           if (!stream->from_boot_loader_modules_image() && strncmp(stream->source(), "jrt:", 4) != 0) {
6290             skip = true;
6291           }
6292 
6293           if (class_loader == NULL && ClassLoader::contains_append_entry(stream->source())) {
6294             // .. but don't skip the boot classes that are loaded from -Xbootclasspath/a
6295             // as they can be loaded from the archive during runtime.
6296             skip = false;
6297           }
6298         }
6299         if (skip) {
6300           tty->print_cr("skip writing class %s from source %s to classlist file",
6301             _class_name->as_C_string(), stream->source());
6302         } else {
6303           classlist_file->print_cr("%s", _class_name->as_C_string());
6304           classlist_file->flush();
6305         }
6306       }
6307     }
6308 #endif
6309   }
6310 
6311   // SUPERKLASS
6312   _super_class_index = stream->get_u2_fast();
6313   _super_klass = parse_super_class(cp,
6314                                    _super_class_index,
6315                                    _need_verify,
6316                                    CHECK);
6317 
6318   // Interfaces
6319   _itfs_len = stream->get_u2_fast();
6320   parse_interfaces(stream,
6321                    _itfs_len,
6322                    cp,
6323                    &_has_nonstatic_concrete_methods,
6324                    CHECK);
6325 
6326   assert(_local_interfaces != NULL, "invariant");
6327 
6328   // Fields (offsets are filled in later)
6329   _fac = new FieldAllocationCount();
6330   parse_fields(stream,
6331                _access_flags.is_interface(),
6332                _fac,
6333                cp,
6334                cp_size,
6335                &_java_fields_count,
6336                CHECK);
6337 
6338   assert(_fields != NULL, "invariant");
6339 
6340   // Methods
6341   AccessFlags promoted_flags;
6342   parse_methods(stream,
6343                 _access_flags.is_interface(),
6344                 &promoted_flags,
6345                 &_has_final_method,
6346                 &_declares_nonstatic_concrete_methods,
6347                 CHECK);
6348 
6349   assert(_methods != NULL, "invariant");
6350 
6351   // promote flags from parse_methods() to the klass' flags
6352   _access_flags.add_promoted_flags(promoted_flags.as_int());
6353 
6354   if (_declares_nonstatic_concrete_methods) {
6355     _has_nonstatic_concrete_methods = true;
6356   }
6357 
6358   // Additional attributes/annotations
6359   _parsed_annotations = new ClassAnnotationCollector();
6360   parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
6361 
6362   assert(_inner_classes != NULL, "invariant");
6363 
6364   // Finalize the Annotations metadata object,
6365   // now that all annotation arrays have been created.
6366   create_combined_annotations(CHECK);
6367 
6368   // Make sure this is the end of class file stream
6369   guarantee_property(stream->at_eos(),
6370                      "Extra bytes at the end of class file %s",
6371                      CHECK);
6372 
6373   // all bytes in stream read and parsed
6374 }
6375 
6376 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
6377                                                  ConstantPool* cp,
6378                                                  TRAPS) {
6379   assert(stream != NULL, "invariant");
6380   assert(stream->at_eos(), "invariant");
6381   assert(cp != NULL, "invariant");
6382   assert(_loader_data != NULL, "invariant");
6383 
6384   if (_class_name == vmSymbols::java_lang_Object()) {
6385     check_property(_local_interfaces == Universe::the_empty_instance_klass_array(),
6386                    "java.lang.Object cannot implement an interface in class file %s",
6387                    CHECK);
6388   }
6389   // We check super class after class file is parsed and format is checked
6390   if (_super_class_index > 0 && NULL ==_super_klass) {
6391     Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
6392     if (_access_flags.is_interface()) {
6393       // Before attempting to resolve the superclass, check for class format
6394       // errors not checked yet.
6395       guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
6396         "Interfaces must have java.lang.Object as superclass in class file %s",
6397         CHECK);
6398     }
6399     Handle loader(THREAD, _loader_data->class_loader());
6400     _super_klass = (const InstanceKlass*)
6401                        SystemDictionary::resolve_super_or_fail(_class_name,
6402                                                                super_class_name,
6403                                                                loader,
6404                                                                _protection_domain,
6405                                                                true,
6406                                                                CHECK);
6407   }
6408 
6409   if (_super_klass != NULL) {
6410     if (_super_klass->has_nonstatic_concrete_methods()) {
6411       _has_nonstatic_concrete_methods = true;
6412     }
6413 
6414     if (_super_klass->is_interface()) {
6415       ResourceMark rm(THREAD);
6416       Exceptions::fthrow(
6417         THREAD_AND_LOCATION,
6418         vmSymbols::java_lang_IncompatibleClassChangeError(),
6419         "class %s has interface %s as super class",
6420         _class_name->as_klass_external_name(),
6421         _super_klass->external_name()
6422       );
6423       return;
6424     }
6425   }
6426 
6427   // Compute the transitive list of all unique interfaces implemented by this class
6428   _transitive_interfaces =
6429     compute_transitive_interfaces(_super_klass,
6430                                   _local_interfaces,
6431                                   _loader_data,
6432                                   CHECK);
6433 
6434   assert(_transitive_interfaces != NULL, "invariant");
6435 
6436   // sort methods
6437   _method_ordering = sort_methods(_methods);
6438 
6439   _all_mirandas = new GrowableArray<Method*>(20);
6440 
6441   Handle loader(THREAD, _loader_data->class_loader());
6442   bool is_sealed = _access_flags.is_final() &&
6443                          _permitted_subtypes != NULL &&
6444                          _permitted_subtypes != Universe::the_empty_short_array() &&
6445                          _permitted_subtypes->length() > 0;
6446   klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
6447                                                     &_num_miranda_methods,
6448                                                     _all_mirandas,
6449                                                     _super_klass,
6450                                                     _methods,
6451                                                     _access_flags,
6452                                                     is_sealed,
6453                                                     _major_version,
6454                                                     loader,
6455                                                     _class_name,
6456                                                     _local_interfaces,
6457                                                     CHECK);
6458 
6459   // Size of Java itable (in words)
6460   _itable_size = _access_flags.is_interface() ? 0 :
6461     klassItable::compute_itable_size(_transitive_interfaces);
6462 
6463   assert(_fac != NULL, "invariant");
6464   assert(_parsed_annotations != NULL, "invariant");
6465 
6466   _field_info = new FieldLayoutInfo();
6467   layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6468 
6469   // Compute reference typ
6470   _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6471 
6472 }
6473 
6474 void ClassFileParser::check_subtyping(TRAPS) {
6475   assert(NULL != _klass, "_klass should have been resolved before calling this method");
6476   if (_super_klass != NULL) {
6477     if (_super_klass->is_final()) {
6478       bool isPermittedSubtype = _super_klass->has_as_permitted_subtype(_klass, CHECK);
6479       if (!isPermittedSubtype) {
6480         THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
6481       }
6482     }
6483   }
6484   Array<InstanceKlass*>* local_interfaces = _klass->local_interfaces();
6485   if (local_interfaces != NULL && local_interfaces != Universe::the_empty_instance_klass_array()) {
6486     for (int i = 0; i < local_interfaces->length(); i++) {
6487       InstanceKlass* intf = local_interfaces->at(i);
6488       if (intf->is_final()) {
6489         bool isPermittedSubtype = intf->has_as_permitted_subtype(_klass, CHECK);
6490         if (!isPermittedSubtype) {
6491           THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final interface");
6492         }
6493       }
6494     }
6495   }
6496 }
6497 
6498 void ClassFileParser::set_klass(InstanceKlass* klass) {
6499 
6500 #ifdef ASSERT
6501   if (klass != NULL) {
6502     assert(NULL == _klass, "leaking?");
6503   }
6504 #endif
6505 
6506   _klass = klass;
6507 }
6508 
6509 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6510 
6511 #ifdef ASSERT
6512   if (klass != NULL) {
6513     assert(NULL == _klass_to_deallocate, "leaking?");
6514   }
6515 #endif
6516 
6517   _klass_to_deallocate = klass;
6518 }
6519 
6520 // Caller responsible for ResourceMark
6521 // clone stream with rewound position
6522 const ClassFileStream* ClassFileParser::clone_stream() const {
6523   assert(_stream != NULL, "invariant");
6524 
6525   return _stream->clone();
6526 }
6527 // ----------------------------------------------------------------------------
6528 // debugging
6529 
6530 #ifdef ASSERT
6531 
6532 // return true if class_name contains no '.' (internal format is '/')
6533 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6534   if (class_name != NULL) {
6535     ResourceMark rm;
6536     char* name = class_name->as_C_string();
6537     return strchr(name, '.') == NULL;
6538   } else {
6539     return true;
6540   }
6541 }
6542 
6543 #endif