1 /*
   2  * Copyright (c) 1997, 2015, 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 
  25 #include "precompiled.hpp"
  26 #include "classfile/classFileParser.hpp"
  27 #include "classfile/classLoader.hpp"
  28 #include "classfile/classLoaderData.inline.hpp"
  29 #include "classfile/defaultMethods.hpp"
  30 #include "classfile/javaClasses.inline.hpp"
  31 #include "classfile/symbolTable.hpp"
  32 #include "classfile/systemDictionary.hpp"
  33 #include "classfile/verificationType.hpp"
  34 #include "classfile/verifier.hpp"
  35 #include "classfile/vmSymbols.hpp"
  36 #include "gc/shared/gcLocker.hpp"
  37 #include "memory/allocation.hpp"
  38 #include "memory/metadataFactory.hpp"
  39 #include "memory/oopFactory.hpp"
  40 #include "memory/referenceType.hpp"
  41 #include "memory/resourceArea.hpp"
  42 #include "memory/universe.inline.hpp"
  43 #include "oops/constantPool.hpp"
  44 #include "oops/fieldStreams.hpp"
  45 #include "oops/instanceKlass.hpp"
  46 #include "oops/instanceMirrorKlass.hpp"
  47 #include "oops/klass.inline.hpp"
  48 #include "oops/klassVtable.hpp"
  49 #include "oops/method.hpp"
  50 #include "oops/symbol.hpp"
  51 #include "prims/jvm.h"
  52 #include "prims/jvmtiExport.hpp"
  53 #include "prims/jvmtiThreadState.hpp"
  54 #include "runtime/javaCalls.hpp"
  55 #include "runtime/perfData.hpp"
  56 #include "runtime/reflection.hpp"
  57 #include "runtime/signature.hpp"
  58 #include "runtime/timer.hpp"
  59 #include "services/classLoadingService.hpp"
  60 #include "services/threadService.hpp"
  61 #include "utilities/array.hpp"
  62 #include "utilities/exceptions.hpp"
  63 #include "utilities/globalDefinitions.hpp"
  64 #include "utilities/macros.hpp"
  65 #include "utilities/ostream.hpp"
  66 #include "utilities/resourceHash.hpp"
  67 #if INCLUDE_CDS
  68 #include "classfile/systemDictionaryShared.hpp"
  69 #endif
  70 
  71 // We generally try to create the oops directly when parsing, rather than
  72 // allocating temporary data structures and copying the bytes twice. A
  73 // temporary area is only needed when parsing utf8 entries in the constant
  74 // pool and when parsing line number tables.
  75 
  76 // We add assert in debug mode when class format is not checked.
  77 
  78 #define JAVA_CLASSFILE_MAGIC              0xCAFEBABE
  79 #define JAVA_MIN_SUPPORTED_VERSION        45
  80 #define JAVA_MAX_SUPPORTED_VERSION        52
  81 #define JAVA_MAX_SUPPORTED_MINOR_VERSION  0
  82 
  83 // Used for two backward compatibility reasons:
  84 // - to check for new additions to the class file format in JDK1.5
  85 // - to check for bug fixes in the format checker in JDK1.5
  86 #define JAVA_1_5_VERSION                  49
  87 
  88 // Used for backward compatibility reasons:
  89 // - to check for javac bug fixes that happened after 1.5
  90 // - also used as the max version when running in jdk6
  91 #define JAVA_6_VERSION                    50
  92 
  93 // Used for backward compatibility reasons:
  94 // - to check NameAndType_info signatures more aggressively
  95 // - to disallow argument and require ACC_STATIC for <clinit> methods
  96 #define JAVA_7_VERSION                    51
  97 
  98 // Extension method support.
  99 #define JAVA_8_VERSION                    52
 100 
 101 void ClassFileParser::parse_constant_pool_entries(int length, TRAPS) {
 102   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
 103   // this function (_current can be allocated in a register, with scalar
 104   // replacement of aggregates). The _current pointer is copied back to
 105   // stream() when this function returns. DON'T call another method within
 106   // this method that uses stream().
 107   ClassFileStream* cfs0 = stream();
 108   ClassFileStream cfs1 = *cfs0;
 109   ClassFileStream* cfs = &cfs1;
 110 #ifdef ASSERT
 111   assert(cfs->allocated_on_stack(),"should be local");
 112   u1* old_current = cfs0->current();
 113 #endif
 114   Handle class_loader(THREAD, _loader_data->class_loader());
 115 
 116   // Used for batching symbol allocations.
 117   const char* names[SymbolTable::symbol_alloc_batch_size];
 118   int lengths[SymbolTable::symbol_alloc_batch_size];
 119   int indices[SymbolTable::symbol_alloc_batch_size];
 120   unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
 121   int names_count = 0;
 122 
 123   // parsing  Index 0 is unused
 124   for (int index = 1; index < length; index++) {
 125     // Each of the following case guarantees one more byte in the stream
 126     // for the following tag or the access_flags following constant pool,
 127     // so we don't need bounds-check for reading tag.
 128     u1 tag = cfs->get_u1_fast();
 129     switch (tag) {
 130       case JVM_CONSTANT_Class :
 131         {
 132           cfs->guarantee_more(3, CHECK);  // name_index, tag/access_flags
 133           u2 name_index = cfs->get_u2_fast();
 134           _cp->klass_index_at_put(index, name_index);
 135         }
 136         break;
 137       case JVM_CONSTANT_Fieldref :
 138         {
 139           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 140           u2 class_index = cfs->get_u2_fast();
 141           u2 name_and_type_index = cfs->get_u2_fast();
 142           _cp->field_at_put(index, class_index, name_and_type_index);
 143         }
 144         break;
 145       case JVM_CONSTANT_Methodref :
 146         {
 147           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 148           u2 class_index = cfs->get_u2_fast();
 149           u2 name_and_type_index = cfs->get_u2_fast();
 150           _cp->method_at_put(index, class_index, name_and_type_index);
 151         }
 152         break;
 153       case JVM_CONSTANT_InterfaceMethodref :
 154         {
 155           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 156           u2 class_index = cfs->get_u2_fast();
 157           u2 name_and_type_index = cfs->get_u2_fast();
 158           _cp->interface_method_at_put(index, class_index, name_and_type_index);
 159         }
 160         break;
 161       case JVM_CONSTANT_String :
 162         {
 163           cfs->guarantee_more(3, CHECK);  // string_index, tag/access_flags
 164           u2 string_index = cfs->get_u2_fast();
 165           _cp->string_index_at_put(index, string_index);
 166         }
 167         break;
 168       case JVM_CONSTANT_MethodHandle :
 169       case JVM_CONSTANT_MethodType :
 170         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 171           classfile_parse_error(
 172             "Class file version does not support constant tag %u in class file %s",
 173             tag, CHECK);
 174         }
 175         if (tag == JVM_CONSTANT_MethodHandle) {
 176           cfs->guarantee_more(4, CHECK);  // ref_kind, method_index, tag/access_flags
 177           u1 ref_kind = cfs->get_u1_fast();
 178           u2 method_index = cfs->get_u2_fast();
 179           _cp->method_handle_index_at_put(index, ref_kind, method_index);
 180         } else if (tag == JVM_CONSTANT_MethodType) {
 181           cfs->guarantee_more(3, CHECK);  // signature_index, tag/access_flags
 182           u2 signature_index = cfs->get_u2_fast();
 183           _cp->method_type_index_at_put(index, signature_index);
 184         } else {
 185           ShouldNotReachHere();
 186         }
 187         break;
 188       case JVM_CONSTANT_InvokeDynamic :
 189         {
 190           if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 191             classfile_parse_error(
 192               "Class file version does not support constant tag %u in class file %s",
 193               tag, CHECK);
 194           }
 195           cfs->guarantee_more(5, CHECK);  // bsm_index, nt, tag/access_flags
 196           u2 bootstrap_specifier_index = cfs->get_u2_fast();
 197           u2 name_and_type_index = cfs->get_u2_fast();
 198           if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
 199             _max_bootstrap_specifier_index = (int) bootstrap_specifier_index;  // collect for later
 200           _cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
 201         }
 202         break;
 203       case JVM_CONSTANT_Integer :
 204         {
 205           cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 206           u4 bytes = cfs->get_u4_fast();
 207           _cp->int_at_put(index, (jint) bytes);
 208         }
 209         break;
 210       case JVM_CONSTANT_Float :
 211         {
 212           cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 213           u4 bytes = cfs->get_u4_fast();
 214           _cp->float_at_put(index, *(jfloat*)&bytes);
 215         }
 216         break;
 217       case JVM_CONSTANT_Long :
 218         // A mangled type might cause you to overrun allocated memory
 219         guarantee_property(index+1 < length,
 220                            "Invalid constant pool entry %u in class file %s",
 221                            index, CHECK);
 222         {
 223           cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 224           u8 bytes = cfs->get_u8_fast();
 225           _cp->long_at_put(index, bytes);
 226         }
 227         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 228         break;
 229       case JVM_CONSTANT_Double :
 230         // A mangled type might cause you to overrun allocated memory
 231         guarantee_property(index+1 < length,
 232                            "Invalid constant pool entry %u in class file %s",
 233                            index, CHECK);
 234         {
 235           cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 236           u8 bytes = cfs->get_u8_fast();
 237           _cp->double_at_put(index, *(jdouble*)&bytes);
 238         }
 239         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 240         break;
 241       case JVM_CONSTANT_NameAndType :
 242         {
 243           cfs->guarantee_more(5, CHECK);  // name_index, signature_index, tag/access_flags
 244           u2 name_index = cfs->get_u2_fast();
 245           u2 signature_index = cfs->get_u2_fast();
 246           _cp->name_and_type_at_put(index, name_index, signature_index);
 247         }
 248         break;
 249       case JVM_CONSTANT_Utf8 :
 250         {
 251           cfs->guarantee_more(2, CHECK);  // utf8_length
 252           u2  utf8_length = cfs->get_u2_fast();
 253           u1* utf8_buffer = cfs->get_u1_buffer();
 254           assert(utf8_buffer != NULL, "null utf8 buffer");
 255           // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
 256           cfs->guarantee_more(utf8_length+1, CHECK);  // utf8 string, tag/access_flags
 257           cfs->skip_u1_fast(utf8_length);
 258 
 259           // Before storing the symbol, make sure it's legal
 260           if (_need_verify) {
 261             verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
 262           }
 263 
 264           if (has_cp_patch_at(index)) {
 265             Handle patch = clear_cp_patch_at(index);
 266             guarantee_property(java_lang_String::is_instance(patch()),
 267                                "Illegal utf8 patch at %d in class file %s",
 268                                index, CHECK);
 269             char* str = java_lang_String::as_utf8_string(patch());
 270             // (could use java_lang_String::as_symbol instead, but might as well batch them)
 271             utf8_buffer = (u1*) str;
 272             utf8_length = (int) strlen(str);
 273           }
 274 
 275           unsigned int hash;
 276           Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
 277           if (result == NULL) {
 278             names[names_count] = (char*)utf8_buffer;
 279             lengths[names_count] = utf8_length;
 280             indices[names_count] = index;
 281             hashValues[names_count++] = hash;
 282             if (names_count == SymbolTable::symbol_alloc_batch_size) {
 283               SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK);
 284               names_count = 0;
 285             }
 286           } else {
 287             _cp->symbol_at_put(index, result);
 288           }
 289         }
 290         break;
 291       default:
 292         classfile_parse_error(
 293           "Unknown constant tag %u in class file %s", tag, CHECK);
 294         break;
 295     }
 296   }
 297 
 298   // Allocate the remaining symbols
 299   if (names_count > 0) {
 300     SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK);
 301   }
 302 
 303   // Copy _current pointer of local copy back to stream().
 304 #ifdef ASSERT
 305   assert(cfs0->current() == old_current, "non-exclusive use of stream()");
 306 #endif
 307   cfs0->set_current(cfs1.current());
 308 }
 309 
 310 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
 311 
 312 inline Symbol* check_symbol_at(constantPoolHandle cp, int index) {
 313   if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8())
 314     return cp->symbol_at(index);
 315   else
 316     return NULL;
 317 }
 318 
 319 #ifdef ASSERT
 320 PRAGMA_DIAG_PUSH
 321 PRAGMA_FORMAT_NONLITERAL_IGNORED
 322 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) {
 323   ResourceMark rm(THREAD);
 324   fatal(msg, _class_name->as_C_string());
 325 }
 326 
 327 void ClassFileParser::report_assert_property_failure(const char* msg, int index, TRAPS) {
 328   ResourceMark rm(THREAD);
 329   fatal(msg, index, _class_name->as_C_string());
 330 }
 331 PRAGMA_DIAG_POP
 332 #endif
 333 
 334 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
 335   ClassFileStream* cfs = stream();
 336   constantPoolHandle nullHandle;
 337 
 338   cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
 339   u2 length = cfs->get_u2_fast();
 340   guarantee_property(
 341     length >= 1, "Illegal constant pool size %u in class file %s",
 342     length, CHECK_(nullHandle));
 343   ConstantPool* constant_pool = ConstantPool::allocate(_loader_data, length,
 344                                                         CHECK_(nullHandle));
 345   _cp = constant_pool; // save in case of errors
 346   constantPoolHandle cp (THREAD, constant_pool);
 347 
 348   // parsing constant pool entries
 349   parse_constant_pool_entries(length, CHECK_(nullHandle));
 350 
 351   int index = 1;  // declared outside of loops for portability
 352 
 353   // first verification pass - validate cross references and fixup class and string constants
 354   for (index = 1; index < length; index++) {          // Index 0 is unused
 355     jbyte tag = cp->tag_at(index).value();
 356     switch (tag) {
 357       case JVM_CONSTANT_Class :
 358         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 359         break;
 360       case JVM_CONSTANT_Fieldref :
 361         // fall through
 362       case JVM_CONSTANT_Methodref :
 363         // fall through
 364       case JVM_CONSTANT_InterfaceMethodref : {
 365         if (!_need_verify) break;
 366         int klass_ref_index = cp->klass_ref_index_at(index);
 367         int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
 368         check_property(valid_klass_reference_at(klass_ref_index),
 369                        "Invalid constant pool index %u in class file %s",
 370                        klass_ref_index,
 371                        CHECK_(nullHandle));
 372         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 373                        cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 374                        "Invalid constant pool index %u in class file %s",
 375                        name_and_type_ref_index,
 376                        CHECK_(nullHandle));
 377         break;
 378       }
 379       case JVM_CONSTANT_String :
 380         ShouldNotReachHere();     // Only JVM_CONSTANT_StringIndex should be present
 381         break;
 382       case JVM_CONSTANT_Integer :
 383         break;
 384       case JVM_CONSTANT_Float :
 385         break;
 386       case JVM_CONSTANT_Long :
 387       case JVM_CONSTANT_Double :
 388         index++;
 389         check_property(
 390           (index < length && cp->tag_at(index).is_invalid()),
 391           "Improper constant pool long/double index %u in class file %s",
 392           index, CHECK_(nullHandle));
 393         break;
 394       case JVM_CONSTANT_NameAndType : {
 395         if (!_need_verify) break;
 396         int name_ref_index = cp->name_ref_index_at(index);
 397         int signature_ref_index = cp->signature_ref_index_at(index);
 398         check_property(valid_symbol_at(name_ref_index),
 399                  "Invalid constant pool index %u in class file %s",
 400                  name_ref_index, CHECK_(nullHandle));
 401         check_property(valid_symbol_at(signature_ref_index),
 402                  "Invalid constant pool index %u in class file %s",
 403                  signature_ref_index, CHECK_(nullHandle));
 404         break;
 405       }
 406       case JVM_CONSTANT_Utf8 :
 407         break;
 408       case JVM_CONSTANT_UnresolvedClass :         // fall-through
 409       case JVM_CONSTANT_UnresolvedClassInError:
 410         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 411         break;
 412       case JVM_CONSTANT_ClassIndex :
 413         {
 414           int class_index = cp->klass_index_at(index);
 415           check_property(valid_symbol_at(class_index),
 416                  "Invalid constant pool index %u in class file %s",
 417                  class_index, CHECK_(nullHandle));
 418           cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
 419         }
 420         break;
 421       case JVM_CONSTANT_StringIndex :
 422         {
 423           int string_index = cp->string_index_at(index);
 424           check_property(valid_symbol_at(string_index),
 425                  "Invalid constant pool index %u in class file %s",
 426                  string_index, CHECK_(nullHandle));
 427           Symbol* sym = cp->symbol_at(string_index);
 428           cp->unresolved_string_at_put(index, sym);
 429         }
 430         break;
 431       case JVM_CONSTANT_MethodHandle :
 432         {
 433           int ref_index = cp->method_handle_index_at(index);
 434           check_property(
 435             valid_cp_range(ref_index, length),
 436               "Invalid constant pool index %u in class file %s",
 437               ref_index, CHECK_(nullHandle));
 438           constantTag tag = cp->tag_at(ref_index);
 439           int ref_kind  = cp->method_handle_ref_kind_at(index);
 440           switch (ref_kind) {
 441           case JVM_REF_getField:
 442           case JVM_REF_getStatic:
 443           case JVM_REF_putField:
 444           case JVM_REF_putStatic:
 445             check_property(
 446               tag.is_field(),
 447               "Invalid constant pool index %u in class file %s (not a field)",
 448               ref_index, CHECK_(nullHandle));
 449             break;
 450           case JVM_REF_invokeVirtual:
 451           case JVM_REF_newInvokeSpecial:
 452             check_property(
 453               tag.is_method(),
 454               "Invalid constant pool index %u in class file %s (not a method)",
 455               ref_index, CHECK_(nullHandle));
 456             break;
 457           case JVM_REF_invokeStatic:
 458           case JVM_REF_invokeSpecial:
 459             check_property(tag.is_method() ||
 460                            ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
 461                "Invalid constant pool index %u in class file %s (not a method)",
 462                ref_index, CHECK_(nullHandle));
 463              break;
 464           case JVM_REF_invokeInterface:
 465             check_property(
 466               tag.is_interface_method(),
 467               "Invalid constant pool index %u in class file %s (not an interface method)",
 468               ref_index, CHECK_(nullHandle));
 469             break;
 470           default:
 471             classfile_parse_error(
 472               "Bad method handle kind at constant pool index %u in class file %s",
 473               index, CHECK_(nullHandle));
 474           }
 475           // Keep the ref_index unchanged.  It will be indirected at link-time.
 476         }
 477         break;
 478       case JVM_CONSTANT_MethodType :
 479         {
 480           int ref_index = cp->method_type_index_at(index);
 481           check_property(valid_symbol_at(ref_index),
 482                  "Invalid constant pool index %u in class file %s",
 483                  ref_index, CHECK_(nullHandle));
 484         }
 485         break;
 486       case JVM_CONSTANT_InvokeDynamic :
 487         {
 488           int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
 489           check_property(valid_cp_range(name_and_type_ref_index, length) &&
 490                          cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 491                          "Invalid constant pool index %u in class file %s",
 492                          name_and_type_ref_index,
 493                          CHECK_(nullHandle));
 494           // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
 495           break;
 496         }
 497       default:
 498         fatal("bad constant pool tag value %u", cp->tag_at(index).value());
 499         ShouldNotReachHere();
 500         break;
 501     } // end of switch
 502   } // end of for
 503 
 504   if (_cp_patches != NULL) {
 505     // need to treat this_class specially...
 506     int this_class_index;
 507     {
 508       cfs->guarantee_more(8, CHECK_(nullHandle));  // flags, this_class, super_class, infs_len
 509       u1* mark = cfs->current();
 510       u2 flags         = cfs->get_u2_fast();
 511       this_class_index = cfs->get_u2_fast();
 512       cfs->set_current(mark);  // revert to mark
 513     }
 514 
 515     for (index = 1; index < length; index++) {          // Index 0 is unused
 516       if (has_cp_patch_at(index)) {
 517         guarantee_property(index != this_class_index,
 518                            "Illegal constant pool patch to self at %d in class file %s",
 519                            index, CHECK_(nullHandle));
 520         patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
 521       }
 522     }
 523   }
 524 
 525   if (!_need_verify) {
 526     return cp;
 527   }
 528 
 529   // second verification pass - checks the strings are of the right format.
 530   // but not yet to the other entries
 531   for (index = 1; index < length; index++) {
 532     jbyte tag = cp->tag_at(index).value();
 533     switch (tag) {
 534       case JVM_CONSTANT_UnresolvedClass: {
 535         Symbol*  class_name = cp->klass_name_at(index);
 536         // check the name, even if _cp_patches will overwrite it
 537         verify_legal_class_name(class_name, CHECK_(nullHandle));
 538         break;
 539       }
 540       case JVM_CONSTANT_NameAndType: {
 541         if (_need_verify && _major_version >= JAVA_7_VERSION) {
 542           int sig_index = cp->signature_ref_index_at(index);
 543           int name_index = cp->name_ref_index_at(index);
 544           Symbol*  name = cp->symbol_at(name_index);
 545           Symbol*  sig = cp->symbol_at(sig_index);
 546           if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
 547             verify_legal_method_signature(name, sig, CHECK_(nullHandle));
 548           } else {
 549             verify_legal_field_signature(name, sig, CHECK_(nullHandle));
 550           }
 551         }
 552         break;
 553       }
 554       case JVM_CONSTANT_InvokeDynamic:
 555       case JVM_CONSTANT_Fieldref:
 556       case JVM_CONSTANT_Methodref:
 557       case JVM_CONSTANT_InterfaceMethodref: {
 558         int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
 559         // already verified to be utf8
 560         int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
 561         // already verified to be utf8
 562         int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
 563         Symbol*  name = cp->symbol_at(name_ref_index);
 564         Symbol*  signature = cp->symbol_at(signature_ref_index);
 565         if (tag == JVM_CONSTANT_Fieldref) {
 566           verify_legal_field_name(name, CHECK_(nullHandle));
 567           if (_need_verify && _major_version >= JAVA_7_VERSION) {
 568             // Signature is verified above, when iterating NameAndType_info.
 569             // Need only to be sure it's the right type.
 570             if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
 571               throwIllegalSignature(
 572                   "Field", name, signature, CHECK_(nullHandle));
 573             }
 574           } else {
 575             verify_legal_field_signature(name, signature, CHECK_(nullHandle));
 576           }
 577         } else {
 578           verify_legal_method_name(name, CHECK_(nullHandle));
 579           if (_need_verify && _major_version >= JAVA_7_VERSION) {
 580             // Signature is verified above, when iterating NameAndType_info.
 581             // Need only to be sure it's the right type.
 582             if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
 583               throwIllegalSignature(
 584                   "Method", name, signature, CHECK_(nullHandle));
 585             }
 586           } else {
 587             verify_legal_method_signature(name, signature, CHECK_(nullHandle));
 588           }
 589           if (tag == JVM_CONSTANT_Methodref) {
 590             // 4509014: If a class method name begins with '<', it must be "<init>".
 591             assert(name != NULL, "method name in constant pool is null");
 592             unsigned int name_len = name->utf8_length();
 593             assert(name_len > 0, "bad method name");  // already verified as legal name
 594             if (name->byte_at(0) == '<') {
 595               if (name != vmSymbols::object_initializer_name()) {
 596                 classfile_parse_error(
 597                   "Bad method name at constant pool index %u in class file %s",
 598                   name_ref_index, CHECK_(nullHandle));
 599               }
 600             }
 601           }
 602         }
 603         break;
 604       }
 605       case JVM_CONSTANT_MethodHandle: {
 606         int ref_index = cp->method_handle_index_at(index);
 607         int ref_kind  = cp->method_handle_ref_kind_at(index);
 608         switch (ref_kind) {
 609         case JVM_REF_invokeVirtual:
 610         case JVM_REF_invokeStatic:
 611         case JVM_REF_invokeSpecial:
 612         case JVM_REF_newInvokeSpecial:
 613           {
 614             int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
 615             int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
 616             Symbol*  name = cp->symbol_at(name_ref_index);
 617             if (ref_kind == JVM_REF_newInvokeSpecial) {
 618               if (name != vmSymbols::object_initializer_name()) {
 619                 classfile_parse_error(
 620                   "Bad constructor name at constant pool index %u in class file %s",
 621                   name_ref_index, CHECK_(nullHandle));
 622               }
 623             } else {
 624               if (name == vmSymbols::object_initializer_name()) {
 625                 classfile_parse_error(
 626                   "Bad method name at constant pool index %u in class file %s",
 627                   name_ref_index, CHECK_(nullHandle));
 628               }
 629             }
 630           }
 631           break;
 632           // Other ref_kinds are already fully checked in previous pass.
 633         }
 634         break;
 635       }
 636       case JVM_CONSTANT_MethodType: {
 637         Symbol* no_name = vmSymbols::type_name(); // place holder
 638         Symbol*  signature = cp->method_type_signature_at(index);
 639         verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
 640         break;
 641       }
 642       case JVM_CONSTANT_Utf8: {
 643         assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
 644       }
 645     }  // end of switch
 646   }  // end of for
 647 
 648   return cp;
 649 }
 650 
 651 
 652 void ClassFileParser::patch_constant_pool(const constantPoolHandle& cp, int index, Handle patch, TRAPS) {
 653   BasicType patch_type = T_VOID;
 654 
 655   switch (cp->tag_at(index).value()) {
 656 
 657   case JVM_CONSTANT_UnresolvedClass :
 658     // Patching a class means pre-resolving it.
 659     // The name in the constant pool is ignored.
 660     if (java_lang_Class::is_instance(patch())) {
 661       guarantee_property(!java_lang_Class::is_primitive(patch()),
 662                          "Illegal class patch at %d in class file %s",
 663                          index, CHECK);
 664       cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
 665     } else {
 666       guarantee_property(java_lang_String::is_instance(patch()),
 667                          "Illegal class patch at %d in class file %s",
 668                          index, CHECK);
 669       Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
 670       cp->unresolved_klass_at_put(index, name);
 671     }
 672     break;
 673 
 674   case JVM_CONSTANT_String :
 675     // skip this patch and don't clear it.  Needs the oop array for resolved
 676     // references to be created first.
 677     return;
 678 
 679   case JVM_CONSTANT_Integer : patch_type = T_INT;    goto patch_prim;
 680   case JVM_CONSTANT_Float :   patch_type = T_FLOAT;  goto patch_prim;
 681   case JVM_CONSTANT_Long :    patch_type = T_LONG;   goto patch_prim;
 682   case JVM_CONSTANT_Double :  patch_type = T_DOUBLE; goto patch_prim;
 683   patch_prim:
 684     {
 685       jvalue value;
 686       BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
 687       guarantee_property(value_type == patch_type,
 688                          "Illegal primitive patch at %d in class file %s",
 689                          index, CHECK);
 690       switch (value_type) {
 691       case T_INT:    cp->int_at_put(index,   value.i); break;
 692       case T_FLOAT:  cp->float_at_put(index, value.f); break;
 693       case T_LONG:   cp->long_at_put(index,  value.j); break;
 694       case T_DOUBLE: cp->double_at_put(index, value.d); break;
 695       default:       assert(false, "");
 696       }
 697     }
 698     break;
 699 
 700   default:
 701     // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
 702     guarantee_property(!has_cp_patch_at(index),
 703                        "Illegal unexpected patch at %d in class file %s",
 704                        index, CHECK);
 705     return;
 706   }
 707 
 708   // On fall-through, mark the patch as used.
 709   clear_cp_patch_at(index);
 710 }
 711 
 712 
 713 class NameSigHash: public ResourceObj {
 714  public:
 715   Symbol*       _name;       // name
 716   Symbol*       _sig;        // signature
 717   NameSigHash*  _next;       // Next entry in hash table
 718 };
 719 
 720 
 721 #define HASH_ROW_SIZE 256
 722 
 723 unsigned int hash(Symbol* name, Symbol* sig) {
 724   unsigned int raw_hash = 0;
 725   raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
 726   raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
 727 
 728   return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
 729 }
 730 
 731 
 732 void initialize_hashtable(NameSigHash** table) {
 733   memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
 734 }
 735 
 736 // Return false if the name/sig combination is found in table.
 737 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
 738 // The old format checker uses heap sort to find duplicates.
 739 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
 740 // of table since we don't expect Symbol*'s to move.
 741 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
 742   assert(name != NULL, "name in constant pool is NULL");
 743 
 744   // First lookup for duplicates
 745   int index = hash(name, sig);
 746   NameSigHash* entry = table[index];
 747   while (entry != NULL) {
 748     if (entry->_name == name && entry->_sig == sig) {
 749       return false;
 750     }
 751     entry = entry->_next;
 752   }
 753 
 754   // No duplicate is found, allocate a new entry and fill it.
 755   entry = new NameSigHash();
 756   entry->_name = name;
 757   entry->_sig = sig;
 758 
 759   // Insert into hash table
 760   entry->_next = table[index];
 761   table[index] = entry;
 762 
 763   return true;
 764 }
 765 
 766 
 767 Array<Klass*>* ClassFileParser::parse_interfaces(int length,
 768                                                  Handle protection_domain,
 769                                                  Symbol* class_name,
 770                                                  bool* has_default_methods,
 771                                                  TRAPS) {
 772   if (length == 0) {
 773     _local_interfaces = Universe::the_empty_klass_array();
 774   } else {
 775     ClassFileStream* cfs = stream();
 776     assert(length > 0, "only called for length>0");
 777     _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, length, NULL, CHECK_NULL);
 778 
 779     int index;
 780     for (index = 0; index < length; index++) {
 781       u2 interface_index = cfs->get_u2(CHECK_NULL);
 782       KlassHandle interf;
 783       check_property(
 784         valid_klass_reference_at(interface_index),
 785         "Interface name has bad constant pool index %u in class file %s",
 786         interface_index, CHECK_NULL);
 787       if (_cp->tag_at(interface_index).is_klass()) {
 788         interf = KlassHandle(THREAD, _cp->resolved_klass_at(interface_index));
 789       } else {
 790         Symbol*  unresolved_klass  = _cp->klass_name_at(interface_index);
 791 
 792         // Don't need to check legal name because it's checked when parsing constant pool.
 793         // But need to make sure it's not an array type.
 794         guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
 795                            "Bad interface name in class file %s", CHECK_NULL);
 796         Handle class_loader(THREAD, _loader_data->class_loader());
 797 
 798         // Call resolve_super so classcircularity is checked
 799         Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
 800                       unresolved_klass, class_loader, protection_domain,
 801                       false, CHECK_NULL);
 802         interf = KlassHandle(THREAD, k);
 803       }
 804 
 805       if (!interf()->is_interface()) {
 806         THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL);
 807       }
 808       if (InstanceKlass::cast(interf())->has_default_methods()) {
 809         *has_default_methods = true;
 810       }
 811       _local_interfaces->at_put(index, interf());
 812     }
 813 
 814     if (!_need_verify || length <= 1) {
 815       return _local_interfaces;
 816     }
 817 
 818     // Check if there's any duplicates in interfaces
 819     ResourceMark rm(THREAD);
 820     NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
 821       THREAD, NameSigHash*, HASH_ROW_SIZE);
 822     initialize_hashtable(interface_names);
 823     bool dup = false;
 824     {
 825       debug_only(No_Safepoint_Verifier nsv;)
 826       for (index = 0; index < length; index++) {
 827         Klass* k = _local_interfaces->at(index);
 828         Symbol* name = k->name();
 829         // If no duplicates, add (name, NULL) in hashtable interface_names.
 830         if (!put_after_lookup(name, NULL, interface_names)) {
 831           dup = true;
 832           break;
 833         }
 834       }
 835     }
 836     if (dup) {
 837       classfile_parse_error("Duplicate interface name in class file %s", CHECK_NULL);
 838     }
 839   }
 840   return _local_interfaces;
 841 }
 842 
 843 
 844 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, TRAPS) {
 845   // Make sure the constant pool entry is of a type appropriate to this field
 846   guarantee_property(
 847     (constantvalue_index > 0 &&
 848       constantvalue_index < _cp->length()),
 849     "Bad initial value index %u in ConstantValue attribute in class file %s",
 850     constantvalue_index, CHECK);
 851   constantTag value_type = _cp->tag_at(constantvalue_index);
 852   switch ( _cp->basic_type_for_signature_at(signature_index) ) {
 853     case T_LONG:
 854       guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
 855       break;
 856     case T_FLOAT:
 857       guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
 858       break;
 859     case T_DOUBLE:
 860       guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
 861       break;
 862     case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
 863       guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
 864       break;
 865     case T_OBJECT:
 866       guarantee_property((_cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
 867                          && value_type.is_string()),
 868                          "Bad string initial value in class file %s", CHECK);
 869       break;
 870     default:
 871       classfile_parse_error(
 872         "Unable to set initial value %u in class file %s",
 873         constantvalue_index, CHECK);
 874   }
 875 }
 876 
 877 
 878 // Parse attributes for a field.
 879 void ClassFileParser::parse_field_attributes(u2 attributes_count,
 880                                              bool is_static, u2 signature_index,
 881                                              u2* constantvalue_index_addr,
 882                                              bool* is_synthetic_addr,
 883                                              u2* generic_signature_index_addr,
 884                                              ClassFileParser::FieldAnnotationCollector* parsed_annotations,
 885                                              TRAPS) {
 886   ClassFileStream* cfs = stream();
 887   assert(attributes_count > 0, "length should be greater than 0");
 888   u2 constantvalue_index = 0;
 889   u2 generic_signature_index = 0;
 890   bool is_synthetic = false;
 891   u1* runtime_visible_annotations = NULL;
 892   int runtime_visible_annotations_length = 0;
 893   u1* runtime_invisible_annotations = NULL;
 894   int runtime_invisible_annotations_length = 0;
 895   u1* runtime_visible_type_annotations = NULL;
 896   int runtime_visible_type_annotations_length = 0;
 897   u1* runtime_invisible_type_annotations = NULL;
 898   int runtime_invisible_type_annotations_length = 0;
 899   bool runtime_invisible_annotations_exists = false;
 900   bool runtime_invisible_type_annotations_exists = false;
 901   while (attributes_count--) {
 902     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
 903     u2 attribute_name_index = cfs->get_u2_fast();
 904     u4 attribute_length = cfs->get_u4_fast();
 905     check_property(valid_symbol_at(attribute_name_index),
 906                    "Invalid field attribute index %u in class file %s",
 907                    attribute_name_index,
 908                    CHECK);
 909     Symbol* attribute_name = _cp->symbol_at(attribute_name_index);
 910     if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
 911       // ignore if non-static
 912       if (constantvalue_index != 0) {
 913         classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
 914       }
 915       check_property(
 916         attribute_length == 2,
 917         "Invalid ConstantValue field attribute length %u in class file %s",
 918         attribute_length, CHECK);
 919       constantvalue_index = cfs->get_u2(CHECK);
 920       if (_need_verify) {
 921         verify_constantvalue(constantvalue_index, signature_index, CHECK);
 922       }
 923     } else if (attribute_name == vmSymbols::tag_synthetic()) {
 924       if (attribute_length != 0) {
 925         classfile_parse_error(
 926           "Invalid Synthetic field attribute length %u in class file %s",
 927           attribute_length, CHECK);
 928       }
 929       is_synthetic = true;
 930     } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
 931       if (attribute_length != 0) {
 932         classfile_parse_error(
 933           "Invalid Deprecated field attribute length %u in class file %s",
 934           attribute_length, CHECK);
 935       }
 936     } else if (_major_version >= JAVA_1_5_VERSION) {
 937       if (attribute_name == vmSymbols::tag_signature()) {
 938         if (attribute_length != 2) {
 939           classfile_parse_error(
 940             "Wrong size %u for field's Signature attribute in class file %s",
 941             attribute_length, CHECK);
 942         }
 943         generic_signature_index = parse_generic_signature_attribute(CHECK);
 944       } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
 945         if (runtime_visible_annotations != NULL) {
 946           classfile_parse_error(
 947             "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
 948         }
 949         runtime_visible_annotations_length = attribute_length;
 950         runtime_visible_annotations = cfs->get_u1_buffer();
 951         assert(runtime_visible_annotations != NULL, "null visible annotations");
 952         parse_annotations(runtime_visible_annotations,
 953                           runtime_visible_annotations_length,
 954                           parsed_annotations);
 955         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
 956       } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
 957         if (runtime_invisible_annotations_exists) {
 958           classfile_parse_error(
 959             "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
 960         }
 961         runtime_invisible_annotations_exists = true;
 962         if (PreserveAllAnnotations) {
 963           runtime_invisible_annotations_length = attribute_length;
 964           runtime_invisible_annotations = cfs->get_u1_buffer();
 965           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
 966         }
 967         cfs->skip_u1(attribute_length, CHECK);
 968       } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
 969         if (runtime_visible_type_annotations != NULL) {
 970           classfile_parse_error(
 971             "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
 972         }
 973         runtime_visible_type_annotations_length = attribute_length;
 974         runtime_visible_type_annotations = cfs->get_u1_buffer();
 975         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
 976         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
 977       } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
 978         if (runtime_invisible_type_annotations_exists) {
 979           classfile_parse_error(
 980             "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
 981         } else {
 982           runtime_invisible_type_annotations_exists = true;
 983         }
 984         if (PreserveAllAnnotations) {
 985           runtime_invisible_type_annotations_length = attribute_length;
 986           runtime_invisible_type_annotations = cfs->get_u1_buffer();
 987           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
 988         }
 989         cfs->skip_u1(attribute_length, CHECK);
 990       } else {
 991         cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
 992       }
 993     } else {
 994       cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
 995     }
 996   }
 997 
 998   *constantvalue_index_addr = constantvalue_index;
 999   *is_synthetic_addr = is_synthetic;
1000   *generic_signature_index_addr = generic_signature_index;
1001   AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1002                                             runtime_visible_annotations_length,
1003                                             runtime_invisible_annotations,
1004                                             runtime_invisible_annotations_length,
1005                                             CHECK);
1006   parsed_annotations->set_field_annotations(a);
1007   a = assemble_annotations(runtime_visible_type_annotations,
1008                            runtime_visible_type_annotations_length,
1009                            runtime_invisible_type_annotations,
1010                            runtime_invisible_type_annotations_length,
1011                            CHECK);
1012   parsed_annotations->set_field_type_annotations(a);
1013   return;
1014 }
1015 
1016 
1017 // Field allocation types. Used for computing field offsets.
1018 
1019 enum FieldAllocationType {
1020   STATIC_OOP,           // Oops
1021   STATIC_BYTE,          // Boolean, Byte, char
1022   STATIC_SHORT,         // shorts
1023   STATIC_WORD,          // ints
1024   STATIC_DOUBLE,        // aligned long or double
1025   NONSTATIC_OOP,
1026   NONSTATIC_BYTE,
1027   NONSTATIC_SHORT,
1028   NONSTATIC_WORD,
1029   NONSTATIC_DOUBLE,
1030   MAX_FIELD_ALLOCATION_TYPE,
1031   BAD_ALLOCATION_TYPE = -1
1032 };
1033 
1034 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1035   BAD_ALLOCATION_TYPE, // 0
1036   BAD_ALLOCATION_TYPE, // 1
1037   BAD_ALLOCATION_TYPE, // 2
1038   BAD_ALLOCATION_TYPE, // 3
1039   NONSTATIC_BYTE ,     // T_BOOLEAN     =  4,
1040   NONSTATIC_SHORT,     // T_CHAR        =  5,
1041   NONSTATIC_WORD,      // T_FLOAT       =  6,
1042   NONSTATIC_DOUBLE,    // T_DOUBLE      =  7,
1043   NONSTATIC_BYTE,      // T_BYTE        =  8,
1044   NONSTATIC_SHORT,     // T_SHORT       =  9,
1045   NONSTATIC_WORD,      // T_INT         = 10,
1046   NONSTATIC_DOUBLE,    // T_LONG        = 11,
1047   NONSTATIC_OOP,       // T_OBJECT      = 12,
1048   NONSTATIC_OOP,       // T_ARRAY       = 13,
1049   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1050   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1051   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1052   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1053   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1054   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1055   BAD_ALLOCATION_TYPE, // 0
1056   BAD_ALLOCATION_TYPE, // 1
1057   BAD_ALLOCATION_TYPE, // 2
1058   BAD_ALLOCATION_TYPE, // 3
1059   STATIC_BYTE ,        // T_BOOLEAN     =  4,
1060   STATIC_SHORT,        // T_CHAR        =  5,
1061   STATIC_WORD,         // T_FLOAT       =  6,
1062   STATIC_DOUBLE,       // T_DOUBLE      =  7,
1063   STATIC_BYTE,         // T_BYTE        =  8,
1064   STATIC_SHORT,        // T_SHORT       =  9,
1065   STATIC_WORD,         // T_INT         = 10,
1066   STATIC_DOUBLE,       // T_LONG        = 11,
1067   STATIC_OOP,          // T_OBJECT      = 12,
1068   STATIC_OOP,          // T_ARRAY       = 13,
1069   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1070   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1071   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1072   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1073   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1074   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1075 };
1076 
1077 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1078   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1079   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1080   assert(result != BAD_ALLOCATION_TYPE, "bad type");
1081   return result;
1082 }
1083 
1084 class FieldAllocationCount: public ResourceObj {
1085  public:
1086   u2 count[MAX_FIELD_ALLOCATION_TYPE];
1087 
1088   FieldAllocationCount() {
1089     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1090       count[i] = 0;
1091     }
1092   }
1093 
1094   FieldAllocationType update(bool is_static, BasicType type) {
1095     FieldAllocationType atype = basic_type_to_atype(is_static, type);
1096     // Make sure there is no overflow with injected fields.
1097     assert(count[atype] < 0xFFFF, "More than 65535 fields");
1098     count[atype]++;
1099     return atype;
1100   }
1101 };
1102 
1103 Array<u2>* ClassFileParser::parse_fields(Symbol* class_name,
1104                                          bool is_interface,
1105                                          FieldAllocationCount *fac,
1106                                          u2* java_fields_count_ptr, TRAPS) {
1107   ClassFileStream* cfs = stream();
1108   cfs->guarantee_more(2, CHECK_NULL);  // length
1109   u2 length = cfs->get_u2_fast();
1110   *java_fields_count_ptr = length;
1111 
1112   int num_injected = 0;
1113   InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1114   int total_fields = length + num_injected;
1115 
1116   // The field array starts with tuples of shorts
1117   // [access, name index, sig index, initial value index, byte offset].
1118   // A generic signature slot only exists for field with generic
1119   // signature attribute. And the access flag is set with
1120   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1121   // signature slots are at the end of the field array and after all
1122   // other fields data.
1123   //
1124   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1125   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1126   //       ...
1127   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1128   //       [generic signature index]
1129   //       [generic signature index]
1130   //       ...
1131   //
1132   // Allocate a temporary resource array for field data. For each field,
1133   // a slot is reserved in the temporary array for the generic signature
1134   // index. After parsing all fields, the data are copied to a permanent
1135   // array and any unused slots will be discarded.
1136   ResourceMark rm(THREAD);
1137   u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1138              THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1139 
1140   // The generic signature slots start after all other fields' data.
1141   int generic_signature_slot = total_fields * FieldInfo::field_slots;
1142   int num_generic_signature = 0;
1143   for (int n = 0; n < length; n++) {
1144     cfs->guarantee_more(8, CHECK_NULL);  // access_flags, name_index, descriptor_index, attributes_count
1145 
1146     AccessFlags access_flags;
1147     jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1148     verify_legal_field_modifiers(flags, is_interface, CHECK_NULL);
1149     access_flags.set_flags(flags);
1150 
1151     u2 name_index = cfs->get_u2_fast();
1152     int cp_size = _cp->length();
1153     check_property(valid_symbol_at(name_index),
1154       "Invalid constant pool index %u for field name in class file %s",
1155       name_index,
1156       CHECK_NULL);
1157     Symbol*  name = _cp->symbol_at(name_index);
1158     verify_legal_field_name(name, CHECK_NULL);
1159 
1160     u2 signature_index = cfs->get_u2_fast();
1161     check_property(valid_symbol_at(signature_index),
1162       "Invalid constant pool index %u for field signature in class file %s",
1163       signature_index, CHECK_NULL);
1164     Symbol*  sig = _cp->symbol_at(signature_index);
1165     verify_legal_field_signature(name, sig, CHECK_NULL);
1166 
1167     u2 constantvalue_index = 0;
1168     bool is_synthetic = false;
1169     u2 generic_signature_index = 0;
1170     bool is_static = access_flags.is_static();
1171     FieldAnnotationCollector parsed_annotations(_loader_data);
1172 
1173     u2 attributes_count = cfs->get_u2_fast();
1174     if (attributes_count > 0) {
1175       parse_field_attributes(attributes_count, is_static, signature_index,
1176                              &constantvalue_index, &is_synthetic,
1177                              &generic_signature_index, &parsed_annotations,
1178                              CHECK_NULL);
1179       if (parsed_annotations.field_annotations() != NULL) {
1180         if (_fields_annotations == NULL) {
1181           _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1182                                              _loader_data, length, NULL,
1183                                              CHECK_NULL);
1184         }
1185         _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1186         parsed_annotations.set_field_annotations(NULL);
1187       }
1188       if (parsed_annotations.field_type_annotations() != NULL) {
1189         if (_fields_type_annotations == NULL) {
1190           _fields_type_annotations = MetadataFactory::new_array<AnnotationArray*>(
1191                                                   _loader_data, length, NULL,
1192                                                   CHECK_NULL);
1193         }
1194         _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1195         parsed_annotations.set_field_type_annotations(NULL);
1196       }
1197 
1198       if (is_synthetic) {
1199         access_flags.set_is_synthetic();
1200       }
1201       if (generic_signature_index != 0) {
1202         access_flags.set_field_has_generic_signature();
1203         fa[generic_signature_slot] = generic_signature_index;
1204         generic_signature_slot ++;
1205         num_generic_signature ++;
1206       }
1207     }
1208 
1209     FieldInfo* field = FieldInfo::from_field_array(fa, n);
1210     field->initialize(access_flags.as_short(),
1211                       name_index,
1212                       signature_index,
1213                       constantvalue_index);
1214     BasicType type = _cp->basic_type_for_signature_at(signature_index);
1215 
1216     // Remember how many oops we encountered and compute allocation type
1217     FieldAllocationType atype = fac->update(is_static, type);
1218     field->set_allocation_type(atype);
1219 
1220     // After field is initialized with type, we can augment it with aux info
1221     if (parsed_annotations.has_any_annotations())
1222       parsed_annotations.apply_to(field);
1223   }
1224 
1225   int index = length;
1226   if (num_injected != 0) {
1227     for (int n = 0; n < num_injected; n++) {
1228       // Check for duplicates
1229       if (injected[n].may_be_java) {
1230         Symbol* name      = injected[n].name();
1231         Symbol* signature = injected[n].signature();
1232         bool duplicate = false;
1233         for (int i = 0; i < length; i++) {
1234           FieldInfo* f = FieldInfo::from_field_array(fa, i);
1235           if (name      == _cp->symbol_at(f->name_index()) &&
1236               signature == _cp->symbol_at(f->signature_index())) {
1237             // Symbol is desclared in Java so skip this one
1238             duplicate = true;
1239             break;
1240           }
1241         }
1242         if (duplicate) {
1243           // These will be removed from the field array at the end
1244           continue;
1245         }
1246       }
1247 
1248       // Injected field
1249       FieldInfo* field = FieldInfo::from_field_array(fa, index);
1250       field->initialize(JVM_ACC_FIELD_INTERNAL,
1251                         injected[n].name_index,
1252                         injected[n].signature_index,
1253                         0);
1254 
1255       BasicType type = FieldType::basic_type(injected[n].signature());
1256 
1257       // Remember how many oops we encountered and compute allocation type
1258       FieldAllocationType atype = fac->update(false, type);
1259       field->set_allocation_type(atype);
1260       index++;
1261     }
1262   }
1263 
1264   // Now copy the fields' data from the temporary resource array.
1265   // Sometimes injected fields already exist in the Java source so
1266   // the fields array could be too long.  In that case the
1267   // fields array is trimed. Also unused slots that were reserved
1268   // for generic signature indexes are discarded.
1269   Array<u2>* fields = MetadataFactory::new_array<u2>(
1270           _loader_data, index * FieldInfo::field_slots + num_generic_signature,
1271           CHECK_NULL);
1272   _fields = fields; // save in case of error
1273   {
1274     int i = 0;
1275     for (; i < index * FieldInfo::field_slots; i++) {
1276       fields->at_put(i, fa[i]);
1277     }
1278     for (int j = total_fields * FieldInfo::field_slots;
1279          j < generic_signature_slot; j++) {
1280       fields->at_put(i++, fa[j]);
1281     }
1282     assert(i == fields->length(), "");
1283   }
1284 
1285   if (_need_verify && length > 1) {
1286     // Check duplicated fields
1287     ResourceMark rm(THREAD);
1288     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1289       THREAD, NameSigHash*, HASH_ROW_SIZE);
1290     initialize_hashtable(names_and_sigs);
1291     bool dup = false;
1292     {
1293       debug_only(No_Safepoint_Verifier nsv;)
1294       for (AllFieldStream fs(fields, _cp); !fs.done(); fs.next()) {
1295         Symbol* name = fs.name();
1296         Symbol* sig = fs.signature();
1297         // If no duplicates, add name/signature in hashtable names_and_sigs.
1298         if (!put_after_lookup(name, sig, names_and_sigs)) {
1299           dup = true;
1300           break;
1301         }
1302       }
1303     }
1304     if (dup) {
1305       classfile_parse_error("Duplicate field name&signature in class file %s",
1306                             CHECK_NULL);
1307     }
1308   }
1309 
1310   return fields;
1311 }
1312 
1313 
1314 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1315   while (length-- > 0) {
1316     *dest++ = Bytes::get_Java_u2((u1*) (src++));
1317   }
1318 }
1319 
1320 
1321 u2* ClassFileParser::parse_exception_table(u4 code_length,
1322                                            u4 exception_table_length,
1323                                            TRAPS) {
1324   ClassFileStream* cfs = stream();
1325 
1326   u2* exception_table_start = cfs->get_u2_buffer();
1327   assert(exception_table_start != NULL, "null exception table");
1328   cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
1329   // Will check legal target after parsing code array in verifier.
1330   if (_need_verify) {
1331     for (unsigned int i = 0; i < exception_table_length; i++) {
1332       u2 start_pc = cfs->get_u2_fast();
1333       u2 end_pc = cfs->get_u2_fast();
1334       u2 handler_pc = cfs->get_u2_fast();
1335       u2 catch_type_index = cfs->get_u2_fast();
1336       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1337                          "Illegal exception table range in class file %s",
1338                          CHECK_NULL);
1339       guarantee_property(handler_pc < code_length,
1340                          "Illegal exception table handler in class file %s",
1341                          CHECK_NULL);
1342       if (catch_type_index != 0) {
1343         guarantee_property(valid_klass_reference_at(catch_type_index),
1344                            "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1345       }
1346     }
1347   } else {
1348     cfs->skip_u2_fast(exception_table_length * 4);
1349   }
1350   return exception_table_start;
1351 }
1352 
1353 void ClassFileParser::parse_linenumber_table(
1354     u4 code_attribute_length, u4 code_length,
1355     CompressedLineNumberWriteStream** write_stream, TRAPS) {
1356   ClassFileStream* cfs = stream();
1357   unsigned int num_entries = cfs->get_u2(CHECK);
1358 
1359   // Each entry is a u2 start_pc, and a u2 line_number
1360   unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1361 
1362   // Verify line number attribute and table length
1363   check_property(
1364     code_attribute_length == sizeof(u2) + length_in_bytes,
1365     "LineNumberTable attribute has wrong length in class file %s", CHECK);
1366 
1367   cfs->guarantee_more(length_in_bytes, CHECK);
1368 
1369   if ((*write_stream) == NULL) {
1370     if (length_in_bytes > fixed_buffer_size) {
1371       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1372     } else {
1373       (*write_stream) = new CompressedLineNumberWriteStream(
1374         linenumbertable_buffer, fixed_buffer_size);
1375     }
1376   }
1377 
1378   while (num_entries-- > 0) {
1379     u2 bci  = cfs->get_u2_fast(); // start_pc
1380     u2 line = cfs->get_u2_fast(); // line_number
1381     guarantee_property(bci < code_length,
1382         "Invalid pc in LineNumberTable in class file %s", CHECK);
1383     (*write_stream)->write_pair(bci, line);
1384   }
1385 }
1386 
1387 
1388 class LVT_Hash : public AllStatic {
1389  public:
1390 
1391   static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1392   /*
1393    * 3-tuple start_bci/length/slot has to be unique key,
1394    * so the following comparison seems to be redundant:
1395    *       && elem->name_cp_index == entry->_elem->name_cp_index
1396    */
1397     return (e0.start_bci     == e1.start_bci &&
1398             e0.length        == e1.length &&
1399             e0.name_cp_index == e1.name_cp_index &&
1400             e0.slot          == e1.slot);
1401   }
1402 
1403   static unsigned int hash(LocalVariableTableElement const& e0) {
1404     unsigned int raw_hash = e0.start_bci;
1405 
1406     raw_hash = e0.length        + raw_hash * 37;
1407     raw_hash = e0.name_cp_index + raw_hash * 37;
1408     raw_hash = e0.slot          + raw_hash * 37;
1409 
1410     return raw_hash;
1411   }
1412 };
1413 
1414 
1415 // Class file LocalVariableTable elements.
1416 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1417  public:
1418   u2 start_bci;
1419   u2 length;
1420   u2 name_cp_index;
1421   u2 descriptor_cp_index;
1422   u2 slot;
1423 };
1424 
1425 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1426   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
1427   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
1428   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1429   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1430   lvt->signature_cp_index  = 0;
1431   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
1432 }
1433 
1434 // Function is used to parse both attributes:
1435 //       LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1436 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1437                                                u2 max_locals,
1438                                                u4 code_attribute_length,
1439                                                u2* localvariable_table_length,
1440                                                bool isLVTT,
1441                                                TRAPS) {
1442   ClassFileStream* cfs = stream();
1443   const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1444   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1445   unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1446   // Verify local variable table attribute has right length
1447   if (_need_verify) {
1448     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1449                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1450   }
1451   u2* localvariable_table_start = cfs->get_u2_buffer();
1452   assert(localvariable_table_start != NULL, "null local variable table");
1453   if (!_need_verify) {
1454     cfs->skip_u2_fast(size);
1455   } else {
1456     cfs->guarantee_more(size * 2, CHECK_NULL);
1457     for(int i = 0; i < (*localvariable_table_length); i++) {
1458       u2 start_pc = cfs->get_u2_fast();
1459       u2 length = cfs->get_u2_fast();
1460       u2 name_index = cfs->get_u2_fast();
1461       u2 descriptor_index = cfs->get_u2_fast();
1462       u2 index = cfs->get_u2_fast();
1463       // Assign to a u4 to avoid overflow
1464       u4 end_pc = (u4)start_pc + (u4)length;
1465 
1466       if (start_pc >= code_length) {
1467         classfile_parse_error(
1468           "Invalid start_pc %u in %s in class file %s",
1469           start_pc, tbl_name, CHECK_NULL);
1470       }
1471       if (end_pc > code_length) {
1472         classfile_parse_error(
1473           "Invalid length %u in %s in class file %s",
1474           length, tbl_name, CHECK_NULL);
1475       }
1476       int cp_size = _cp->length();
1477       guarantee_property(valid_symbol_at(name_index),
1478         "Name index %u in %s has bad constant type in class file %s",
1479         name_index, tbl_name, CHECK_NULL);
1480       guarantee_property(valid_symbol_at(descriptor_index),
1481         "Signature index %u in %s has bad constant type in class file %s",
1482         descriptor_index, tbl_name, CHECK_NULL);
1483 
1484       Symbol*  name = _cp->symbol_at(name_index);
1485       Symbol*  sig = _cp->symbol_at(descriptor_index);
1486       verify_legal_field_name(name, CHECK_NULL);
1487       u2 extra_slot = 0;
1488       if (!isLVTT) {
1489         verify_legal_field_signature(name, sig, CHECK_NULL);
1490 
1491         // 4894874: check special cases for double and long local variables
1492         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1493             sig == vmSymbols::type_signature(T_LONG)) {
1494           extra_slot = 1;
1495         }
1496       }
1497       guarantee_property((index + extra_slot) < max_locals,
1498                           "Invalid index %u in %s in class file %s",
1499                           index, tbl_name, CHECK_NULL);
1500     }
1501   }
1502   return localvariable_table_start;
1503 }
1504 
1505 
1506 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1507                                       u1* u1_array, u2* u2_array, TRAPS) {
1508   ClassFileStream* cfs = stream();
1509   u2 index = 0; // index in the array with long/double occupying two slots
1510   u4 i1 = *u1_index;
1511   u4 i2 = *u2_index + 1;
1512   for(int i = 0; i < array_length; i++) {
1513     u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1514     index++;
1515     if (tag == ITEM_Long || tag == ITEM_Double) {
1516       index++;
1517     } else if (tag == ITEM_Object) {
1518       u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1519       guarantee_property(valid_klass_reference_at(class_index),
1520                          "Bad class index %u in StackMap in class file %s",
1521                          class_index, CHECK);
1522     } else if (tag == ITEM_Uninitialized) {
1523       u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1524       guarantee_property(
1525         offset < code_length,
1526         "Bad uninitialized type offset %u in StackMap in class file %s",
1527         offset, CHECK);
1528     } else {
1529       guarantee_property(
1530         tag <= (u1)ITEM_Uninitialized,
1531         "Unknown variable type %u in StackMap in class file %s",
1532         tag, CHECK);
1533     }
1534   }
1535   u2_array[*u2_index] = index;
1536   *u1_index = i1;
1537   *u2_index = i2;
1538 }
1539 
1540 u1* ClassFileParser::parse_stackmap_table(
1541     u4 code_attribute_length, TRAPS) {
1542   if (code_attribute_length == 0)
1543     return NULL;
1544 
1545   ClassFileStream* cfs = stream();
1546   u1* stackmap_table_start = cfs->get_u1_buffer();
1547   assert(stackmap_table_start != NULL, "null stackmap table");
1548 
1549   // check code_attribute_length first
1550   stream()->skip_u1(code_attribute_length, CHECK_NULL);
1551 
1552   if (!_need_verify && !DumpSharedSpaces) {
1553     return NULL;
1554   }
1555   return stackmap_table_start;
1556 }
1557 
1558 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1559                                               u4 method_attribute_length,
1560                                               TRAPS) {
1561   ClassFileStream* cfs = stream();
1562   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
1563   *checked_exceptions_length = cfs->get_u2_fast();
1564   unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1565   u2* checked_exceptions_start = cfs->get_u2_buffer();
1566   assert(checked_exceptions_start != NULL, "null checked exceptions");
1567   if (!_need_verify) {
1568     cfs->skip_u2_fast(size);
1569   } else {
1570     // Verify each value in the checked exception table
1571     u2 checked_exception;
1572     u2 len = *checked_exceptions_length;
1573     cfs->guarantee_more(2 * len, CHECK_NULL);
1574     for (int i = 0; i < len; i++) {
1575       checked_exception = cfs->get_u2_fast();
1576       check_property(
1577         valid_klass_reference_at(checked_exception),
1578         "Exception name has bad type at constant pool %u in class file %s",
1579         checked_exception, CHECK_NULL);
1580     }
1581   }
1582   // check exceptions attribute length
1583   if (_need_verify) {
1584     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1585                                                    sizeof(u2) * size),
1586                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1587   }
1588   return checked_exceptions_start;
1589 }
1590 
1591 void ClassFileParser::throwIllegalSignature(
1592     const char* type, Symbol* name, Symbol* sig, TRAPS) {
1593   ResourceMark rm(THREAD);
1594   Exceptions::fthrow(THREAD_AND_LOCATION,
1595       vmSymbols::java_lang_ClassFormatError(),
1596       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1597       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1598 }
1599 
1600 // Skip an annotation.  Return >=limit if there is any problem.
1601 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
1602   // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1603   // value := switch (tag:u1) { ... }
1604   index += 2;  // skip atype
1605   if ((index += 2) >= limit)  return limit;  // read nmem
1606   int nmem = Bytes::get_Java_u2(buffer+index-2);
1607   while (--nmem >= 0 && index < limit) {
1608     index += 2; // skip member
1609     index = skip_annotation_value(buffer, limit, index);
1610   }
1611   return index;
1612 }
1613 
1614 // Skip an annotation value.  Return >=limit if there is any problem.
1615 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
1616   // value := switch (tag:u1) {
1617   //   case B, C, I, S, Z, D, F, J, c: con:u2;
1618   //   case e: e_class:u2 e_name:u2;
1619   //   case s: s_con:u2;
1620   //   case [: do(nval:u2) {value};
1621   //   case @: annotation;
1622   //   case s: s_con:u2;
1623   // }
1624   if ((index += 1) >= limit)  return limit;  // read tag
1625   u1 tag = buffer[index-1];
1626   switch (tag) {
1627   case 'B': case 'C': case 'I': case 'S': case 'Z':
1628   case 'D': case 'F': case 'J': case 'c': case 's':
1629     index += 2;  // skip con or s_con
1630     break;
1631   case 'e':
1632     index += 4;  // skip e_class, e_name
1633     break;
1634   case '[':
1635     {
1636       if ((index += 2) >= limit)  return limit;  // read nval
1637       int nval = Bytes::get_Java_u2(buffer+index-2);
1638       while (--nval >= 0 && index < limit) {
1639         index = skip_annotation_value(buffer, limit, index);
1640       }
1641     }
1642     break;
1643   case '@':
1644     index = skip_annotation(buffer, limit, index);
1645     break;
1646   default:
1647     return limit;  //  bad tag byte
1648   }
1649   return index;
1650 }
1651 
1652 // Sift through annotations, looking for those significant to the VM:
1653 void ClassFileParser::parse_annotations(u1* buffer, int limit,
1654                                         ClassFileParser::AnnotationCollector* coll) {
1655   // annotations := do(nann:u2) {annotation}
1656   int index = 0;
1657   if ((index += 2) >= limit)  return;  // read nann
1658   int nann = Bytes::get_Java_u2(buffer+index-2);
1659   enum {  // initial annotation layout
1660     atype_off = 0,      // utf8 such as 'Ljava/lang/annotation/Retention;'
1661     count_off = 2,      // u2   such as 1 (one value)
1662     member_off = 4,     // utf8 such as 'value'
1663     tag_off = 6,        // u1   such as 'c' (type) or 'e' (enum)
1664     e_tag_val = 'e',
1665       e_type_off = 7,   // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1666       e_con_off = 9,    // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1667       e_size = 11,     // end of 'e' annotation
1668     c_tag_val = 'c',    // payload is type
1669       c_con_off = 7,    // utf8 payload, such as 'I'
1670       c_size = 9,       // end of 'c' annotation
1671     s_tag_val = 's',    // payload is String
1672       s_con_off = 7,    // utf8 payload, such as 'Ljava/lang/String;'
1673       s_size = 9,
1674     min_size = 6        // smallest possible size (zero members)
1675   };
1676   while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
1677     int index0 = index;
1678     index = skip_annotation(buffer, limit, index);
1679     u1* abase = buffer + index0;
1680     int atype = Bytes::get_Java_u2(abase + atype_off);
1681     int count = Bytes::get_Java_u2(abase + count_off);
1682     Symbol* aname = check_symbol_at(_cp, atype);
1683     if (aname == NULL)  break;  // invalid annotation name
1684     Symbol* member = NULL;
1685     if (count >= 1) {
1686       int member_index = Bytes::get_Java_u2(abase + member_off);
1687       member = check_symbol_at(_cp, member_index);
1688       if (member == NULL)  break;  // invalid member name
1689     }
1690 
1691     // Here is where parsing particular annotations will take place.
1692     AnnotationCollector::ID id = coll->annotation_index(_loader_data, aname);
1693     if (id == AnnotationCollector::_unknown)  continue;
1694     coll->set_annotation(id);
1695 
1696     if (id == AnnotationCollector::_sun_misc_Contended) {
1697       // @Contended can optionally specify the contention group.
1698       //
1699       // Contended group defines the equivalence class over the fields:
1700       // the fields within the same contended group are not treated distinct.
1701       // The only exception is default group, which does not incur the
1702       // equivalence. Naturally, contention group for classes is meaningless.
1703       //
1704       // While the contention group is specified as String, annotation
1705       // values are already interned, and we might as well use the constant
1706       // pool index as the group tag.
1707       //
1708       u2 group_index = 0; // default contended group
1709       if (count == 1
1710           && s_size == (index - index0)  // match size
1711           && s_tag_val == *(abase + tag_off)
1712           && member == vmSymbols::value_name()) {
1713         group_index = Bytes::get_Java_u2(abase + s_con_off);
1714         if (_cp->symbol_at(group_index)->utf8_length() == 0) {
1715           group_index = 0; // default contended group
1716         }
1717       }
1718       coll->set_contended_group(group_index);
1719     }
1720     // The Accessor-Annotation specifies the field name it
1721     // belongs to. The index of the symbol is later stored in 
1722     // the method.
1723     if (id == AnnotationCollector::_method_Accessor_Method) {
1724       u2 group_index = 0; 
1725       if (count == 1
1726           && s_size == (index - index0)  // match size
1727           && s_tag_val == *(abase + tag_off)
1728           && member == vmSymbols::value_name()) {
1729         group_index = Bytes::get_Java_u2(abase + s_con_off);
1730         if (_cp->symbol_at(group_index)->utf8_length() != 0) {
1731           coll->set_accessor_field_name(group_index);
1732         }
1733       }
1734     }
1735   }
1736 }
1737 
1738 ClassFileParser::AnnotationCollector::ID
1739 ClassFileParser::AnnotationCollector::annotation_index(ClassLoaderData* loader_data,
1740                                                                 Symbol* name) {
1741   vmSymbols::SID sid = vmSymbols::find_sid(name);
1742   // Privileged code can use all annotations.  Other code silently drops some.
1743   const bool privileged = loader_data->is_the_null_class_loader_data() ||
1744                           loader_data->is_ext_class_loader_data() ||
1745                           loader_data->is_anonymous();
1746   switch (sid) {
1747   case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature):
1748     if (_location != _in_method)  break;  // only allow for methods
1749     if (!privileged)              break;  // only allow in privileged code
1750     return _method_CallerSensitive;
1751   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
1752     if (_location != _in_method)  break;  // only allow for methods
1753     if (!privileged)              break;  // only allow in privileged code
1754     return _method_ForceInline;
1755   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
1756     if (_location != _in_method)  break;  // only allow for methods
1757     if (!privileged)              break;  // only allow in privileged code
1758     return _method_DontInline;
1759   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature):
1760     if (_location != _in_method)  break;  // only allow for methods
1761     if (!privileged)              break;  // only allow in privileged code
1762     return _method_InjectedProfile;
1763   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
1764     if (_location != _in_method)  break;  // only allow for methods
1765     if (!privileged)              break;  // only allow in privileged code
1766     return _method_LambdaForm_Compiled;
1767   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
1768     if (_location != _in_method)  break;  // only allow for methods
1769     if (!privileged)              break;  // only allow in privileged code
1770     return _method_LambdaForm_Hidden;
1771   case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature):
1772     if (_location != _in_method)  break;  // only allow for methods
1773     if (!privileged)              break;  // only allow in privileged code
1774     return _method_HotSpotIntrinsicCandidate;
1775   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_reflect_Accessor_signature):
1776     if (_location != _in_method)  break;  // only allow for methods
1777     return _method_Accessor_Method;
1778 #if INCLUDE_JVMCI
1779   case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_vm_ci_hotspot_Stable_signature):
1780     if (_location != _in_field)   break;  // only allow for fields
1781     if (!privileged)              break;  // only allow in privileged code
1782     return _field_Stable;
1783 #endif
1784   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_Stable_signature):
1785     if (_location != _in_field)   break;  // only allow for fields
1786     if (!privileged)              break;  // only allow in privileged code
1787     return _field_Stable;
1788   case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_misc_Contended_signature):
1789     if (_location != _in_field && _location != _in_class)          break;  // only allow for fields and classes
1790     if (!EnableContended || (RestrictContended && !privileged))    break;  // honor privileges
1791     return _sun_misc_Contended;
1792   default: break;
1793   }
1794   return AnnotationCollector::_unknown;
1795 }
1796 
1797 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1798   if (is_contended())
1799     f->set_contended_group(contended_group());
1800   if (is_stable())
1801     f->set_stable(true);
1802 }
1803 
1804 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
1805   // If there's an error deallocate metadata for field annotations
1806   MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
1807   MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
1808 }
1809 
1810 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1811   if (has_annotation(_method_CallerSensitive))
1812     m->set_caller_sensitive(true);
1813   if (has_annotation(_method_ForceInline))
1814     m->set_force_inline(true);
1815   if (has_annotation(_method_DontInline))
1816     m->set_dont_inline(true);
1817   if (has_annotation(_method_InjectedProfile))
1818     m->set_has_injected_profile(true);
1819   if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1820     m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1821   if (has_annotation(_method_LambdaForm_Hidden))
1822     m->set_hidden(true);
1823   if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
1824     m->set_intrinsic_candidate(true);
1825   if (is_accessor()) {
1826     m->set_accessor_field_name(accessor_field_name());
1827   }
1828 }
1829 
1830 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1831   k->set_is_contended(is_contended());
1832 }
1833 
1834 
1835 #define MAX_ARGS_SIZE 255
1836 #define MAX_CODE_SIZE 65535
1837 #define INITIAL_MAX_LVT_NUMBER 256
1838 
1839 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1840  *
1841  * Rules for LVT's and LVTT's are:
1842  *   - There can be any number of LVT's and LVTT's.
1843  *   - If there are n LVT's, it is the same as if there was just
1844  *     one LVT containing all the entries from the n LVT's.
1845  *   - There may be no more than one LVT entry per local variable.
1846  *     Two LVT entries are 'equal' if these fields are the same:
1847  *        start_pc, length, name, slot
1848  *   - There may be no more than one LVTT entry per each LVT entry.
1849  *     Each LVTT entry has to match some LVT entry.
1850  *   - HotSpot internal LVT keeps natural ordering of class file LVT entries.
1851  */
1852 void ClassFileParser::copy_localvariable_table(ConstMethod* cm,
1853                                                int lvt_cnt,
1854                                                u2* localvariable_table_length,
1855                                                u2** localvariable_table_start,
1856                                                int lvtt_cnt,
1857                                                u2* localvariable_type_table_length,
1858                                                u2** localvariable_type_table_start,
1859                                                TRAPS) {
1860 
1861   ResourceMark rm(THREAD);
1862 
1863   typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
1864                             &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
1865 
1866   LVT_HashTable* table = new LVT_HashTable();
1867 
1868   // To fill LocalVariableTable in
1869   Classfile_LVT_Element*  cf_lvt;
1870   LocalVariableTableElement* lvt = cm->localvariable_table_start();
1871 
1872   for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
1873     cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
1874     for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
1875       copy_lvt_element(&cf_lvt[idx], lvt);
1876       // If no duplicates, add LVT elem in hashtable.
1877       if (table->put(*lvt, lvt) == false
1878           && _need_verify
1879           && _major_version >= JAVA_1_5_VERSION) {
1880         classfile_parse_error("Duplicated LocalVariableTable attribute "
1881                               "entry for '%s' in class file %s",
1882                                _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
1883                                CHECK);
1884       }
1885     }
1886   }
1887 
1888   // To merge LocalVariableTable and LocalVariableTypeTable
1889   Classfile_LVT_Element* cf_lvtt;
1890   LocalVariableTableElement lvtt_elem;
1891 
1892   for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
1893     cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
1894     for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
1895       copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
1896       LocalVariableTableElement** entry = table->get(lvtt_elem);
1897       if (entry == NULL) {
1898         if (_need_verify) {
1899           classfile_parse_error("LVTT entry for '%s' in class file %s "
1900                                 "does not match any LVT entry",
1901                                  _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1902                                  CHECK);
1903         }
1904       } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
1905         classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
1906                               "entry for '%s' in class file %s",
1907                                _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1908                                CHECK);
1909       } else {
1910         // to add generic signatures into LocalVariableTable
1911         (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
1912       }
1913     }
1914   }
1915 }
1916 
1917 
1918 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
1919                                        u1* runtime_visible_annotations,
1920                                        int runtime_visible_annotations_length,
1921                                        u1* runtime_invisible_annotations,
1922                                        int runtime_invisible_annotations_length,
1923                                        u1* runtime_visible_parameter_annotations,
1924                                        int runtime_visible_parameter_annotations_length,
1925                                        u1* runtime_invisible_parameter_annotations,
1926                                        int runtime_invisible_parameter_annotations_length,
1927                                        u1* runtime_visible_type_annotations,
1928                                        int runtime_visible_type_annotations_length,
1929                                        u1* runtime_invisible_type_annotations,
1930                                        int runtime_invisible_type_annotations_length,
1931                                        u1* annotation_default,
1932                                        int annotation_default_length,
1933                                        TRAPS) {
1934 
1935   AnnotationArray* a;
1936 
1937   if (runtime_visible_annotations_length +
1938       runtime_invisible_annotations_length > 0) {
1939      a = assemble_annotations(runtime_visible_annotations,
1940                               runtime_visible_annotations_length,
1941                               runtime_invisible_annotations,
1942                               runtime_invisible_annotations_length,
1943                               CHECK);
1944      cm->set_method_annotations(a);
1945   }
1946 
1947   if (runtime_visible_parameter_annotations_length +
1948       runtime_invisible_parameter_annotations_length > 0) {
1949     a = assemble_annotations(runtime_visible_parameter_annotations,
1950                              runtime_visible_parameter_annotations_length,
1951                              runtime_invisible_parameter_annotations,
1952                              runtime_invisible_parameter_annotations_length,
1953                              CHECK);
1954     cm->set_parameter_annotations(a);
1955   }
1956 
1957   if (annotation_default_length > 0) {
1958     a = assemble_annotations(annotation_default,
1959                              annotation_default_length,
1960                              NULL,
1961                              0,
1962                              CHECK);
1963     cm->set_default_annotations(a);
1964   }
1965 
1966   if (runtime_visible_type_annotations_length +
1967       runtime_invisible_type_annotations_length > 0) {
1968     a = assemble_annotations(runtime_visible_type_annotations,
1969                              runtime_visible_type_annotations_length,
1970                              runtime_invisible_type_annotations,
1971                              runtime_invisible_type_annotations_length,
1972                              CHECK);
1973     cm->set_type_annotations(a);
1974   }
1975 }
1976 
1977 
1978 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1979 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
1980 // Method* to save footprint, so we only know the size of the resulting Method* when the
1981 // entire method attribute is parsed.
1982 //
1983 // The promoted_flags parameter is used to pass relevant access_flags
1984 // from the method back up to the containing klass. These flag values
1985 // are added to klass's access_flags.
1986 
1987 methodHandle ClassFileParser::parse_method(bool is_interface,
1988                                            AccessFlags *promoted_flags,
1989                                            TRAPS) {
1990   ClassFileStream* cfs = stream();
1991   methodHandle nullHandle;
1992   ResourceMark rm(THREAD);
1993   // Parse fixed parts
1994   cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1995 
1996   int flags = cfs->get_u2_fast();
1997   u2 name_index = cfs->get_u2_fast();
1998   int cp_size = _cp->length();
1999   check_property(
2000     valid_symbol_at(name_index),
2001     "Illegal constant pool index %u for method name in class file %s",
2002     name_index, CHECK_(nullHandle));
2003   Symbol*  name = _cp->symbol_at(name_index);
2004   verify_legal_method_name(name, CHECK_(nullHandle));
2005 
2006   u2 signature_index = cfs->get_u2_fast();
2007   guarantee_property(
2008     valid_symbol_at(signature_index),
2009     "Illegal constant pool index %u for method signature in class file %s",
2010     signature_index, CHECK_(nullHandle));
2011   Symbol*  signature = _cp->symbol_at(signature_index);
2012 
2013   AccessFlags access_flags;
2014   if (name == vmSymbols::class_initializer_name()) {
2015     // We ignore the other access flags for a valid class initializer.
2016     // (JVM Spec 2nd ed., chapter 4.6)
2017     if (_major_version < 51) { // backward compatibility
2018       flags = JVM_ACC_STATIC;
2019     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2020       flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2021     } else {
2022       classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_(nullHandle));
2023     }
2024   } else {
2025     verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
2026   }
2027 
2028   if (name == vmSymbols::object_initializer_name() && is_interface) {
2029     classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_(nullHandle));
2030   }
2031 
2032   int args_size = -1;  // only used when _need_verify is true
2033   if (_need_verify) {
2034     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2035                  verify_legal_method_signature(name, signature, CHECK_(nullHandle));
2036     if (args_size > MAX_ARGS_SIZE) {
2037       classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
2038     }
2039   }
2040 
2041   access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2042 
2043   // Default values for code and exceptions attribute elements
2044   u2 max_stack = 0;
2045   u2 max_locals = 0;
2046   u4 code_length = 0;
2047   u1* code_start = 0;
2048   u2 exception_table_length = 0;
2049   u2* exception_table_start = NULL;
2050   Array<int>* exception_handlers = Universe::the_empty_int_array();
2051   u2 checked_exceptions_length = 0;
2052   u2* checked_exceptions_start = NULL;
2053   CompressedLineNumberWriteStream* linenumber_table = NULL;
2054   int linenumber_table_length = 0;
2055   int total_lvt_length = 0;
2056   u2 lvt_cnt = 0;
2057   u2 lvtt_cnt = 0;
2058   bool lvt_allocated = false;
2059   u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2060   u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2061   u2* localvariable_table_length = NULL;
2062   u2** localvariable_table_start = NULL;
2063   u2* localvariable_type_table_length = NULL;
2064   u2** localvariable_type_table_start = NULL;
2065   int method_parameters_length = -1;
2066   u1* method_parameters_data = NULL;
2067   bool method_parameters_seen = false;
2068   bool parsed_code_attribute = false;
2069   bool parsed_checked_exceptions_attribute = false;
2070   bool parsed_stackmap_attribute = false;
2071   // stackmap attribute - JDK1.5
2072   u1* stackmap_data = NULL;
2073   int stackmap_data_length = 0;
2074   u2 generic_signature_index = 0;
2075   MethodAnnotationCollector parsed_annotations;
2076   u1* runtime_visible_annotations = NULL;
2077   int runtime_visible_annotations_length = 0;
2078   u1* runtime_invisible_annotations = NULL;
2079   int runtime_invisible_annotations_length = 0;
2080   u1* runtime_visible_parameter_annotations = NULL;
2081   int runtime_visible_parameter_annotations_length = 0;
2082   u1* runtime_invisible_parameter_annotations = NULL;
2083   int runtime_invisible_parameter_annotations_length = 0;
2084   u1* runtime_visible_type_annotations = NULL;
2085   int runtime_visible_type_annotations_length = 0;
2086   u1* runtime_invisible_type_annotations = NULL;
2087   int runtime_invisible_type_annotations_length = 0;
2088   bool runtime_invisible_annotations_exists = false;
2089   bool runtime_invisible_type_annotations_exists = false;
2090   bool runtime_invisible_parameter_annotations_exists = false;
2091   u1* annotation_default = NULL;
2092   int annotation_default_length = 0;
2093 
2094   // Parse code and exceptions attribute
2095   u2 method_attributes_count = cfs->get_u2_fast();
2096   while (method_attributes_count--) {
2097     cfs->guarantee_more(6, CHECK_(nullHandle));  // method_attribute_name_index, method_attribute_length
2098     u2 method_attribute_name_index = cfs->get_u2_fast();
2099     u4 method_attribute_length = cfs->get_u4_fast();
2100     check_property(
2101       valid_symbol_at(method_attribute_name_index),
2102       "Invalid method attribute name index %u in class file %s",
2103       method_attribute_name_index, CHECK_(nullHandle));
2104 
2105     Symbol* method_attribute_name = _cp->symbol_at(method_attribute_name_index);
2106     if (method_attribute_name == vmSymbols::tag_code()) {
2107       // Parse Code attribute
2108       if (_need_verify) {
2109         guarantee_property(
2110             !access_flags.is_native() && !access_flags.is_abstract(),
2111                         "Code attribute in native or abstract methods in class file %s",
2112                          CHECK_(nullHandle));
2113       }
2114       if (parsed_code_attribute) {
2115         classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
2116       }
2117       parsed_code_attribute = true;
2118 
2119       // Stack size, locals size, and code size
2120       if (_major_version == 45 && _minor_version <= 2) {
2121         cfs->guarantee_more(4, CHECK_(nullHandle));
2122         max_stack = cfs->get_u1_fast();
2123         max_locals = cfs->get_u1_fast();
2124         code_length = cfs->get_u2_fast();
2125       } else {
2126         cfs->guarantee_more(8, CHECK_(nullHandle));
2127         max_stack = cfs->get_u2_fast();
2128         max_locals = cfs->get_u2_fast();
2129         code_length = cfs->get_u4_fast();
2130       }
2131       if (_need_verify) {
2132         guarantee_property(args_size <= max_locals,
2133                            "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
2134         guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2135                            "Invalid method Code length %u in class file %s",
2136                            code_length, CHECK_(nullHandle));
2137       }
2138       // Code pointer
2139       code_start = cfs->get_u1_buffer();
2140       assert(code_start != NULL, "null code start");
2141       cfs->guarantee_more(code_length, CHECK_(nullHandle));
2142       cfs->skip_u1_fast(code_length);
2143 
2144       // Exception handler table
2145       cfs->guarantee_more(2, CHECK_(nullHandle));  // exception_table_length
2146       exception_table_length = cfs->get_u2_fast();
2147       if (exception_table_length > 0) {
2148         exception_table_start =
2149               parse_exception_table(code_length, exception_table_length, CHECK_(nullHandle));
2150       }
2151 
2152       // Parse additional attributes in code attribute
2153       cfs->guarantee_more(2, CHECK_(nullHandle));  // code_attributes_count
2154       u2 code_attributes_count = cfs->get_u2_fast();
2155 
2156       unsigned int calculated_attribute_length = 0;
2157 
2158       if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2159         calculated_attribute_length =
2160             sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2161       } else {
2162         // max_stack, locals and length are smaller in pre-version 45.2 classes
2163         calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2164       }
2165       calculated_attribute_length +=
2166         code_length +
2167         sizeof(exception_table_length) +
2168         sizeof(code_attributes_count) +
2169         exception_table_length *
2170             ( sizeof(u2) +   // start_pc
2171               sizeof(u2) +   // end_pc
2172               sizeof(u2) +   // handler_pc
2173               sizeof(u2) );  // catch_type_index
2174 
2175       while (code_attributes_count--) {
2176         cfs->guarantee_more(6, CHECK_(nullHandle));  // code_attribute_name_index, code_attribute_length
2177         u2 code_attribute_name_index = cfs->get_u2_fast();
2178         u4 code_attribute_length = cfs->get_u4_fast();
2179         calculated_attribute_length += code_attribute_length +
2180                                        sizeof(code_attribute_name_index) +
2181                                        sizeof(code_attribute_length);
2182         check_property(valid_symbol_at(code_attribute_name_index),
2183                        "Invalid code attribute name index %u in class file %s",
2184                        code_attribute_name_index,
2185                        CHECK_(nullHandle));
2186         if (LoadLineNumberTables &&
2187             _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2188           // Parse and compress line number table
2189           parse_linenumber_table(code_attribute_length, code_length,
2190             &linenumber_table, CHECK_(nullHandle));
2191 
2192         } else if (LoadLocalVariableTables &&
2193                    _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2194           // Parse local variable table
2195           if (!lvt_allocated) {
2196             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2197               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2198             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2199               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2200             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2201               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2202             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2203               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2204             lvt_allocated = true;
2205           }
2206           if (lvt_cnt == max_lvt_cnt) {
2207             max_lvt_cnt <<= 1;
2208             localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2209             localvariable_table_start  = REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2210           }
2211           localvariable_table_start[lvt_cnt] =
2212             parse_localvariable_table(code_length,
2213                                       max_locals,
2214                                       code_attribute_length,
2215                                       &localvariable_table_length[lvt_cnt],
2216                                       false,    // is not LVTT
2217                                       CHECK_(nullHandle));
2218           total_lvt_length += localvariable_table_length[lvt_cnt];
2219           lvt_cnt++;
2220         } else if (LoadLocalVariableTypeTables &&
2221                    _major_version >= JAVA_1_5_VERSION &&
2222                    _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2223           if (!lvt_allocated) {
2224             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2225               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2226             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2227               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2228             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2229               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2230             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2231               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2232             lvt_allocated = true;
2233           }
2234           // Parse local variable type table
2235           if (lvtt_cnt == max_lvtt_cnt) {
2236             max_lvtt_cnt <<= 1;
2237             localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2238             localvariable_type_table_start  = REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2239           }
2240           localvariable_type_table_start[lvtt_cnt] =
2241             parse_localvariable_table(code_length,
2242                                       max_locals,
2243                                       code_attribute_length,
2244                                       &localvariable_type_table_length[lvtt_cnt],
2245                                       true,     // is LVTT
2246                                       CHECK_(nullHandle));
2247           lvtt_cnt++;
2248         } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2249                    _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2250           // Stack map is only needed by the new verifier in JDK1.5.
2251           if (parsed_stackmap_attribute) {
2252             classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2253           }
2254           stackmap_data = parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
2255           stackmap_data_length = code_attribute_length;
2256           parsed_stackmap_attribute = true;
2257         } else {
2258           // Skip unknown attributes
2259           cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2260         }
2261       }
2262       // check method attribute length
2263       if (_need_verify) {
2264         guarantee_property(method_attribute_length == calculated_attribute_length,
2265                            "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2266       }
2267     } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2268       // Parse Exceptions attribute
2269       if (parsed_checked_exceptions_attribute) {
2270         classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2271       }
2272       parsed_checked_exceptions_attribute = true;
2273       checked_exceptions_start =
2274             parse_checked_exceptions(&checked_exceptions_length,
2275                                      method_attribute_length,
2276                                      CHECK_(nullHandle));
2277     } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2278       // reject multiple method parameters
2279       if (method_parameters_seen) {
2280         classfile_parse_error("Multiple MethodParameters attributes in class file %s", CHECK_(nullHandle));
2281       }
2282       method_parameters_seen = true;
2283       method_parameters_length = cfs->get_u1_fast();
2284       const u2 real_length = (method_parameters_length * 4u) + 1u;
2285       if (method_attribute_length != real_length) {
2286         classfile_parse_error(
2287           "Invalid MethodParameters method attribute length %u in class file",
2288           method_attribute_length, CHECK_(nullHandle));
2289       }
2290       method_parameters_data = cfs->get_u1_buffer();
2291       cfs->skip_u2_fast(method_parameters_length);
2292       cfs->skip_u2_fast(method_parameters_length);
2293       // ignore this attribute if it cannot be reflected
2294       if (!SystemDictionary::Parameter_klass_loaded())
2295         method_parameters_length = -1;
2296     } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2297       if (method_attribute_length != 0) {
2298         classfile_parse_error(
2299           "Invalid Synthetic method attribute length %u in class file %s",
2300           method_attribute_length, CHECK_(nullHandle));
2301       }
2302       // Should we check that there hasn't already been a synthetic attribute?
2303       access_flags.set_is_synthetic();
2304     } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2305       if (method_attribute_length != 0) {
2306         classfile_parse_error(
2307           "Invalid Deprecated method attribute length %u in class file %s",
2308           method_attribute_length, CHECK_(nullHandle));
2309       }
2310     } else if (_major_version >= JAVA_1_5_VERSION) {
2311       if (method_attribute_name == vmSymbols::tag_signature()) {
2312         if (method_attribute_length != 2) {
2313           classfile_parse_error(
2314             "Invalid Signature attribute length %u in class file %s",
2315             method_attribute_length, CHECK_(nullHandle));
2316         }
2317         generic_signature_index = parse_generic_signature_attribute(CHECK_(nullHandle));
2318       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2319         if (runtime_visible_annotations != NULL) {
2320           classfile_parse_error(
2321             "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2322         }
2323         runtime_visible_annotations_length = method_attribute_length;
2324         runtime_visible_annotations = cfs->get_u1_buffer();
2325         assert(runtime_visible_annotations != NULL, "null visible annotations");
2326         parse_annotations(runtime_visible_annotations,
2327             runtime_visible_annotations_length, &parsed_annotations);
2328         cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2329       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2330         if (runtime_invisible_annotations_exists) {
2331           classfile_parse_error(
2332             "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2333         }
2334         runtime_invisible_annotations_exists = true;
2335         if (PreserveAllAnnotations) {
2336           runtime_invisible_annotations_length = method_attribute_length;
2337           runtime_invisible_annotations = cfs->get_u1_buffer();
2338           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2339         }
2340         cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2341       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2342         if (runtime_visible_parameter_annotations != NULL) {
2343           classfile_parse_error(
2344             "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2345         }
2346         runtime_visible_parameter_annotations_length = method_attribute_length;
2347         runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2348         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2349         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2350       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2351         if (runtime_invisible_parameter_annotations_exists) {
2352           classfile_parse_error(
2353             "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle));
2354         }
2355         runtime_invisible_parameter_annotations_exists = true;
2356         if (PreserveAllAnnotations) {
2357           runtime_invisible_parameter_annotations_length = method_attribute_length;
2358           runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2359           assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2360         }
2361         cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2362       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2363         if (annotation_default != NULL) {
2364           classfile_parse_error(
2365             "Multiple AnnotationDefault attributes for method in class file %s",
2366             CHECK_(nullHandle));
2367         }
2368         annotation_default_length = method_attribute_length;
2369         annotation_default = cfs->get_u1_buffer();
2370         assert(annotation_default != NULL, "null annotation default");
2371         cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2372       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2373         if (runtime_visible_type_annotations != NULL) {
2374           classfile_parse_error(
2375             "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2376             CHECK_(nullHandle));
2377         }
2378         runtime_visible_type_annotations_length = method_attribute_length;
2379         runtime_visible_type_annotations = cfs->get_u1_buffer();
2380         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2381         // No need for the VM to parse Type annotations
2382         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_(nullHandle));
2383       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2384         if (runtime_invisible_type_annotations_exists) {
2385           classfile_parse_error(
2386             "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2387             CHECK_(nullHandle));
2388         } else {
2389           runtime_invisible_type_annotations_exists = true;
2390         }
2391         if (PreserveAllAnnotations) {
2392           runtime_invisible_type_annotations_length = method_attribute_length;
2393           runtime_invisible_type_annotations = cfs->get_u1_buffer();
2394           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2395         }
2396         cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2397       } else {
2398         // Skip unknown attributes
2399         cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2400       }
2401     } else {
2402       // Skip unknown attributes
2403       cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2404     }
2405   }
2406 
2407   if (linenumber_table != NULL) {
2408     linenumber_table->write_terminator();
2409     linenumber_table_length = linenumber_table->position();
2410   }
2411 
2412   // Make sure there's at least one Code attribute in non-native/non-abstract method
2413   if (_need_verify) {
2414     guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2415                       "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2416   }
2417 
2418   // All sizing information for a Method* is finally available, now create it
2419   InlineTableSizes sizes(
2420       total_lvt_length,
2421       linenumber_table_length,
2422       exception_table_length,
2423       checked_exceptions_length,
2424       method_parameters_length,
2425       generic_signature_index,
2426       runtime_visible_annotations_length +
2427            runtime_invisible_annotations_length,
2428       runtime_visible_parameter_annotations_length +
2429            runtime_invisible_parameter_annotations_length,
2430       runtime_visible_type_annotations_length +
2431            runtime_invisible_type_annotations_length,
2432       annotation_default_length,
2433       0);
2434 
2435   Method* m = Method::allocate(
2436       _loader_data, code_length, access_flags, &sizes,
2437       ConstMethod::NORMAL, CHECK_(nullHandle));
2438 
2439   ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2440 
2441   // Fill in information from fixed part (access_flags already set)
2442   m->set_constants(_cp);
2443   m->set_name_index(name_index);
2444   m->set_signature_index(signature_index);
2445 #ifdef CC_INTERP
2446   // hmm is there a gc issue here??
2447   ResultTypeFinder rtf(_cp->symbol_at(signature_index));
2448   m->set_result_index(rtf.type());
2449 #endif
2450 
2451   if (args_size >= 0) {
2452     m->set_size_of_parameters(args_size);
2453   } else {
2454     m->compute_size_of_parameters(THREAD);
2455   }
2456 #ifdef ASSERT
2457   if (args_size >= 0) {
2458     m->compute_size_of_parameters(THREAD);
2459     assert(args_size == m->size_of_parameters(), "");
2460   }
2461 #endif
2462 
2463   // Fill in code attribute information
2464   m->set_max_stack(max_stack);
2465   m->set_max_locals(max_locals);
2466   if (stackmap_data != NULL) {
2467     m->constMethod()->copy_stackmap_data(_loader_data, stackmap_data,
2468                                          stackmap_data_length, CHECK_NULL);
2469   }
2470 
2471   // Copy byte codes
2472   m->set_code(code_start);
2473 
2474   // Copy line number table
2475   if (linenumber_table != NULL) {
2476     memcpy(m->compressed_linenumber_table(),
2477            linenumber_table->buffer(), linenumber_table_length);
2478   }
2479 
2480   // Copy exception table
2481   if (exception_table_length > 0) {
2482     int size =
2483       exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2484     copy_u2_with_conversion((u2*) m->exception_table_start(),
2485                              exception_table_start, size);
2486   }
2487 
2488   // Copy method parameters
2489   if (method_parameters_length > 0) {
2490     MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2491     for (int i = 0; i < method_parameters_length; i++) {
2492       elem[i].name_cp_index = Bytes::get_Java_u2(method_parameters_data);
2493       method_parameters_data += 2;
2494       elem[i].flags = Bytes::get_Java_u2(method_parameters_data);
2495       method_parameters_data += 2;
2496     }
2497   }
2498 
2499   // Copy checked exceptions
2500   if (checked_exceptions_length > 0) {
2501     int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2502     copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2503   }
2504 
2505   // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2506   if (total_lvt_length > 0) {
2507     promoted_flags->set_has_localvariable_table();
2508     copy_localvariable_table(m->constMethod(), lvt_cnt,
2509                              localvariable_table_length,
2510                              localvariable_table_start,
2511                              lvtt_cnt,
2512                              localvariable_type_table_length,
2513                              localvariable_type_table_start, CHECK_NULL);
2514   }
2515 
2516   if (parsed_annotations.has_any_annotations())
2517     parsed_annotations.apply_to(m);
2518 
2519   // Copy annotations
2520   copy_method_annotations(m->constMethod(),
2521                           runtime_visible_annotations,
2522                           runtime_visible_annotations_length,
2523                           runtime_invisible_annotations,
2524                           runtime_invisible_annotations_length,
2525                           runtime_visible_parameter_annotations,
2526                           runtime_visible_parameter_annotations_length,
2527                           runtime_invisible_parameter_annotations,
2528                           runtime_invisible_parameter_annotations_length,
2529                           runtime_visible_type_annotations,
2530                           runtime_visible_type_annotations_length,
2531                           runtime_invisible_type_annotations,
2532                           runtime_invisible_type_annotations_length,
2533                           annotation_default,
2534                           annotation_default_length,
2535                           CHECK_NULL);
2536 
2537   if (name == vmSymbols::finalize_method_name() &&
2538       signature == vmSymbols::void_method_signature()) {
2539     if (m->is_empty_method()) {
2540       _has_empty_finalizer = true;
2541     } else {
2542       _has_finalizer = true;
2543     }
2544   }
2545   if (name == vmSymbols::object_initializer_name() &&
2546       signature == vmSymbols::void_method_signature() &&
2547       m->is_vanilla_constructor()) {
2548     _has_vanilla_constructor = true;
2549   }
2550 
2551   NOT_PRODUCT(m->verify());
2552   return m;
2553 }
2554 
2555 
2556 // The promoted_flags parameter is used to pass relevant access_flags
2557 // from the methods back up to the containing klass. These flag values
2558 // are added to klass's access_flags.
2559 
2560 Array<Method*>* ClassFileParser::parse_methods(bool is_interface,
2561                                                AccessFlags* promoted_flags,
2562                                                bool* has_final_method,
2563                                                bool* declares_default_methods,
2564                                                TRAPS) {
2565   ClassFileStream* cfs = stream();
2566   cfs->guarantee_more(2, CHECK_NULL);  // length
2567   u2 length = cfs->get_u2_fast();
2568   if (length == 0) {
2569     _methods = Universe::the_empty_method_array();
2570   } else {
2571     _methods = MetadataFactory::new_array<Method*>(_loader_data, length, NULL, CHECK_NULL);
2572 
2573     HandleMark hm(THREAD);
2574     for (int index = 0; index < length; index++) {
2575       methodHandle method = parse_method(is_interface,
2576                                          promoted_flags,
2577                                          CHECK_NULL);
2578 
2579       if (method->is_final()) {
2580         *has_final_method = true;
2581       }
2582       // declares_default_methods: declares concrete instance methods, any access flags
2583       // used for interface initialization, and default method inheritance analysis
2584       if (is_interface && !(*declares_default_methods)
2585         && !method->is_abstract() && !method->is_static()) {
2586         *declares_default_methods = true;
2587       }
2588       _methods->at_put(index, method());
2589     }
2590 
2591     if (_need_verify && length > 1) {
2592       // Check duplicated methods
2593       ResourceMark rm(THREAD);
2594       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2595         THREAD, NameSigHash*, HASH_ROW_SIZE);
2596       initialize_hashtable(names_and_sigs);
2597       bool dup = false;
2598       {
2599         debug_only(No_Safepoint_Verifier nsv;)
2600         for (int i = 0; i < length; i++) {
2601           Method* m = _methods->at(i);
2602           // If no duplicates, add name/signature in hashtable names_and_sigs.
2603           if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2604             dup = true;
2605             break;
2606           }
2607         }
2608       }
2609       if (dup) {
2610         classfile_parse_error("Duplicate method name&signature in class file %s",
2611                               CHECK_NULL);
2612       }
2613     }
2614   }
2615   return _methods;
2616 }
2617 
2618 
2619 intArray* ClassFileParser::sort_methods(Array<Method*>* methods) {
2620   int length = methods->length();
2621   // If JVMTI original method ordering or sharing is enabled we have to
2622   // remember the original class file ordering.
2623   // We temporarily use the vtable_index field in the Method* to store the
2624   // class file index, so we can read in after calling qsort.
2625   // Put the method ordering in the shared archive.
2626   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2627     for (int index = 0; index < length; index++) {
2628       Method* m = methods->at(index);
2629       assert(!m->valid_vtable_index(), "vtable index should not be set");
2630       m->set_vtable_index(index);
2631     }
2632   }
2633   // Sort method array by ascending method name (for faster lookups & vtable construction)
2634   // Note that the ordering is not alphabetical, see Symbol::fast_compare
2635   Method::sort_methods(methods);
2636 
2637   intArray* method_ordering = NULL;
2638   // If JVMTI original method ordering or sharing is enabled construct int
2639   // array remembering the original ordering
2640   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2641     method_ordering = new intArray(length);
2642     for (int index = 0; index < length; index++) {
2643       Method* m = methods->at(index);
2644       int old_index = m->vtable_index();
2645       assert(old_index >= 0 && old_index < length, "invalid method index");
2646       method_ordering->at_put(index, old_index);
2647       m->set_vtable_index(Method::invalid_vtable_index);
2648     }
2649   }
2650   return method_ordering;
2651 }
2652 
2653 // Parse generic_signature attribute for methods and fields
2654 u2 ClassFileParser::parse_generic_signature_attribute(TRAPS) {
2655   ClassFileStream* cfs = stream();
2656   cfs->guarantee_more(2, CHECK_0);  // generic_signature_index
2657   u2 generic_signature_index = cfs->get_u2_fast();
2658   check_property(
2659     valid_symbol_at(generic_signature_index),
2660     "Invalid Signature attribute at constant pool index %u in class file %s",
2661     generic_signature_index, CHECK_0);
2662   return generic_signature_index;
2663 }
2664 
2665 void ClassFileParser::parse_classfile_sourcefile_attribute(TRAPS) {
2666   ClassFileStream* cfs = stream();
2667   cfs->guarantee_more(2, CHECK);  // sourcefile_index
2668   u2 sourcefile_index = cfs->get_u2_fast();
2669   check_property(
2670     valid_symbol_at(sourcefile_index),
2671     "Invalid SourceFile attribute at constant pool index %u in class file %s",
2672     sourcefile_index, CHECK);
2673   set_class_sourcefile_index(sourcefile_index);
2674 }
2675 
2676 
2677 
2678 void ClassFileParser::parse_classfile_source_debug_extension_attribute(int length, TRAPS) {
2679   ClassFileStream* cfs = stream();
2680   u1* sde_buffer = cfs->get_u1_buffer();
2681   assert(sde_buffer != NULL, "null sde buffer");
2682 
2683   // Don't bother storing it if there is no way to retrieve it
2684   if (JvmtiExport::can_get_source_debug_extension()) {
2685     assert((length+1) > length, "Overflow checking");
2686     u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2687     for (int i = 0; i < length; i++) {
2688       sde[i] = sde_buffer[i];
2689     }
2690     sde[length] = '\0';
2691     set_class_sde_buffer((char*)sde, length);
2692   }
2693   // Got utf8 string, set stream position forward
2694   cfs->skip_u1(length, CHECK);
2695 }
2696 
2697 
2698 // Inner classes can be static, private or protected (classic VM does this)
2699 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2700 
2701 // Return number of classes in the inner classes attribute table
2702 u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start,
2703                                                             bool parsed_enclosingmethod_attribute,
2704                                                             u2 enclosing_method_class_index,
2705                                                             u2 enclosing_method_method_index,
2706                                                             TRAPS) {
2707   ClassFileStream* cfs = stream();
2708   u1* current_mark = cfs->current();
2709   u2 length = 0;
2710   if (inner_classes_attribute_start != NULL) {
2711     cfs->set_current(inner_classes_attribute_start);
2712     cfs->guarantee_more(2, CHECK_0);  // length
2713     length = cfs->get_u2_fast();
2714   }
2715 
2716   // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2717   // method data:
2718   //   [inner_class_info_index,
2719   //    outer_class_info_index,
2720   //    inner_name_index,
2721   //    inner_class_access_flags,
2722   //    ...
2723   //    enclosing_method_class_index,
2724   //    enclosing_method_method_index]
2725   int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2726   Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
2727   _inner_classes = inner_classes;
2728 
2729   int index = 0;
2730   int cp_size = _cp->length();
2731   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
2732   for (int n = 0; n < length; n++) {
2733     // Inner class index
2734     u2 inner_class_info_index = cfs->get_u2_fast();
2735     check_property(
2736       valid_klass_reference_at(inner_class_info_index),
2737       "inner_class_info_index %u has bad constant type in class file %s",
2738       inner_class_info_index, CHECK_0);
2739     // Outer class index
2740     u2 outer_class_info_index = cfs->get_u2_fast();
2741     check_property(
2742       outer_class_info_index == 0 ||
2743         valid_klass_reference_at(outer_class_info_index),
2744       "outer_class_info_index %u has bad constant type in class file %s",
2745       outer_class_info_index, CHECK_0);
2746     // Inner class name
2747     u2 inner_name_index = cfs->get_u2_fast();
2748     check_property(
2749       inner_name_index == 0 || valid_symbol_at(inner_name_index),
2750       "inner_name_index %u has bad constant type in class file %s",
2751       inner_name_index, CHECK_0);
2752     if (_need_verify) {
2753       guarantee_property(inner_class_info_index != outer_class_info_index,
2754                          "Class is both outer and inner class in class file %s", CHECK_0);
2755     }
2756     // Access flags
2757     AccessFlags inner_access_flags;
2758     jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2759     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2760       // Set abstract bit for old class files for backward compatibility
2761       flags |= JVM_ACC_ABSTRACT;
2762     }
2763     verify_legal_class_modifiers(flags, CHECK_0);
2764     inner_access_flags.set_flags(flags);
2765 
2766     inner_classes->at_put(index++, inner_class_info_index);
2767     inner_classes->at_put(index++, outer_class_info_index);
2768     inner_classes->at_put(index++, inner_name_index);
2769     inner_classes->at_put(index++, inner_access_flags.as_short());
2770   }
2771 
2772   // 4347400: make sure there's no duplicate entry in the classes array
2773   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2774     for(int i = 0; i < length * 4; i += 4) {
2775       for(int j = i + 4; j < length * 4; j += 4) {
2776         guarantee_property((inner_classes->at(i)   != inner_classes->at(j) ||
2777                             inner_classes->at(i+1) != inner_classes->at(j+1) ||
2778                             inner_classes->at(i+2) != inner_classes->at(j+2) ||
2779                             inner_classes->at(i+3) != inner_classes->at(j+3)),
2780                             "Duplicate entry in InnerClasses in class file %s",
2781                             CHECK_0);
2782       }
2783     }
2784   }
2785 
2786   // Set EnclosingMethod class and method indexes.
2787   if (parsed_enclosingmethod_attribute) {
2788     inner_classes->at_put(index++, enclosing_method_class_index);
2789     inner_classes->at_put(index++, enclosing_method_method_index);
2790   }
2791   assert(index == size, "wrong size");
2792 
2793   // Restore buffer's current position.
2794   cfs->set_current(current_mark);
2795 
2796   return length;
2797 }
2798 
2799 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
2800   set_class_synthetic_flag(true);
2801 }
2802 
2803 void ClassFileParser::parse_classfile_signature_attribute(TRAPS) {
2804   ClassFileStream* cfs = stream();
2805   u2 signature_index = cfs->get_u2(CHECK);
2806   check_property(
2807     valid_symbol_at(signature_index),
2808     "Invalid constant pool index %u in Signature attribute in class file %s",
2809     signature_index, CHECK);
2810   set_class_generic_signature_index(signature_index);
2811 }
2812 
2813 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(u4 attribute_byte_length, TRAPS) {
2814   ClassFileStream* cfs = stream();
2815   u1* current_start = cfs->current();
2816 
2817   guarantee_property(attribute_byte_length >= sizeof(u2),
2818                      "Invalid BootstrapMethods attribute length %u in class file %s",
2819                      attribute_byte_length,
2820                      CHECK);
2821 
2822   cfs->guarantee_more(attribute_byte_length, CHECK);
2823 
2824   int attribute_array_length = cfs->get_u2_fast();
2825 
2826   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2827                      "Short length on BootstrapMethods in class file %s",
2828                      CHECK);
2829 
2830 
2831   // The attribute contains a counted array of counted tuples of shorts,
2832   // represending bootstrap specifiers:
2833   //    length*{bootstrap_method_index, argument_count*{argument_index}}
2834   int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2835   // operand_count = number of shorts in attr, except for leading length
2836 
2837   // The attribute is copied into a short[] array.
2838   // The array begins with a series of short[2] pairs, one for each tuple.
2839   int index_size = (attribute_array_length * 2);
2840 
2841   Array<u2>* operands = MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
2842 
2843   // Eagerly assign operands so they will be deallocated with the constant
2844   // pool if there is an error.
2845   _cp->set_operands(operands);
2846 
2847   int operand_fill_index = index_size;
2848   int cp_size = _cp->length();
2849 
2850   for (int n = 0; n < attribute_array_length; n++) {
2851     // Store a 32-bit offset into the header of the operand array.
2852     ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
2853 
2854     // Read a bootstrap specifier.
2855     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
2856     u2 bootstrap_method_index = cfs->get_u2_fast();
2857     u2 argument_count = cfs->get_u2_fast();
2858     check_property(
2859       valid_cp_range(bootstrap_method_index, cp_size) &&
2860       _cp->tag_at(bootstrap_method_index).is_method_handle(),
2861       "bootstrap_method_index %u has bad constant type in class file %s",
2862       bootstrap_method_index,
2863       CHECK);
2864 
2865     guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
2866       "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
2867       CHECK);
2868 
2869     operands->at_put(operand_fill_index++, bootstrap_method_index);
2870     operands->at_put(operand_fill_index++, argument_count);
2871 
2872     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
2873     for (int j = 0; j < argument_count; j++) {
2874       u2 argument_index = cfs->get_u2_fast();
2875       check_property(
2876         valid_cp_range(argument_index, cp_size) &&
2877         _cp->tag_at(argument_index).is_loadable_constant(),
2878         "argument_index %u has bad constant type in class file %s",
2879         argument_index,
2880         CHECK);
2881       operands->at_put(operand_fill_index++, argument_index);
2882     }
2883   }
2884 
2885   u1* current_end = cfs->current();
2886   guarantee_property(current_end == current_start + attribute_byte_length,
2887                      "Bad length on BootstrapMethods in class file %s",
2888                      CHECK);
2889 }
2890 
2891 void ClassFileParser::parse_classfile_attributes(ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2892                                                  TRAPS) {
2893   ClassFileStream* cfs = stream();
2894   // Set inner classes attribute to default sentinel
2895   _inner_classes = Universe::the_empty_short_array();
2896   cfs->guarantee_more(2, CHECK);  // attributes_count
2897   u2 attributes_count = cfs->get_u2_fast();
2898   bool parsed_sourcefile_attribute = false;
2899   bool parsed_innerclasses_attribute = false;
2900   bool parsed_enclosingmethod_attribute = false;
2901   bool parsed_bootstrap_methods_attribute = false;
2902   u1* runtime_visible_annotations = NULL;
2903   int runtime_visible_annotations_length = 0;
2904   u1* runtime_invisible_annotations = NULL;
2905   int runtime_invisible_annotations_length = 0;
2906   u1* runtime_visible_type_annotations = NULL;
2907   int runtime_visible_type_annotations_length = 0;
2908   u1* runtime_invisible_type_annotations = NULL;
2909   int runtime_invisible_type_annotations_length = 0;
2910   bool runtime_invisible_type_annotations_exists = false;
2911   bool runtime_invisible_annotations_exists = false;
2912   bool parsed_source_debug_ext_annotations_exist = false;
2913   u1* inner_classes_attribute_start = NULL;
2914   u4  inner_classes_attribute_length = 0;
2915   u2  enclosing_method_class_index = 0;
2916   u2  enclosing_method_method_index = 0;
2917   // Iterate over attributes
2918   while (attributes_count--) {
2919     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
2920     u2 attribute_name_index = cfs->get_u2_fast();
2921     u4 attribute_length = cfs->get_u4_fast();
2922     check_property(
2923       valid_symbol_at(attribute_name_index),
2924       "Attribute name has bad constant pool index %u in class file %s",
2925       attribute_name_index, CHECK);
2926     Symbol* tag = _cp->symbol_at(attribute_name_index);
2927     if (tag == vmSymbols::tag_source_file()) {
2928       // Check for SourceFile tag
2929       if (_need_verify) {
2930         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2931       }
2932       if (parsed_sourcefile_attribute) {
2933         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2934       } else {
2935         parsed_sourcefile_attribute = true;
2936       }
2937       parse_classfile_sourcefile_attribute(CHECK);
2938     } else if (tag == vmSymbols::tag_source_debug_extension()) {
2939       // Check for SourceDebugExtension tag
2940       if (parsed_source_debug_ext_annotations_exist) {
2941           classfile_parse_error(
2942             "Multiple SourceDebugExtension attributes in class file %s", CHECK);
2943       }
2944       parsed_source_debug_ext_annotations_exist = true;
2945       parse_classfile_source_debug_extension_attribute((int)attribute_length, CHECK);
2946     } else if (tag == vmSymbols::tag_inner_classes()) {
2947       // Check for InnerClasses tag
2948       if (parsed_innerclasses_attribute) {
2949         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2950       } else {
2951         parsed_innerclasses_attribute = true;
2952       }
2953       inner_classes_attribute_start = cfs->get_u1_buffer();
2954       inner_classes_attribute_length = attribute_length;
2955       cfs->skip_u1(inner_classes_attribute_length, CHECK);
2956     } else if (tag == vmSymbols::tag_synthetic()) {
2957       // Check for Synthetic tag
2958       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2959       if (attribute_length != 0) {
2960         classfile_parse_error(
2961           "Invalid Synthetic classfile attribute length %u in class file %s",
2962           attribute_length, CHECK);
2963       }
2964       parse_classfile_synthetic_attribute(CHECK);
2965     } else if (tag == vmSymbols::tag_deprecated()) {
2966       // Check for Deprecatd tag - 4276120
2967       if (attribute_length != 0) {
2968         classfile_parse_error(
2969           "Invalid Deprecated classfile attribute length %u in class file %s",
2970           attribute_length, CHECK);
2971       }
2972     } else if (_major_version >= JAVA_1_5_VERSION) {
2973       if (tag == vmSymbols::tag_signature()) {
2974         if (attribute_length != 2) {
2975           classfile_parse_error(
2976             "Wrong Signature attribute length %u in class file %s",
2977             attribute_length, CHECK);
2978         }
2979         parse_classfile_signature_attribute(CHECK);
2980       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2981         if (runtime_visible_annotations != NULL) {
2982           classfile_parse_error(
2983             "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
2984         }
2985         runtime_visible_annotations_length = attribute_length;
2986         runtime_visible_annotations = cfs->get_u1_buffer();
2987         assert(runtime_visible_annotations != NULL, "null visible annotations");
2988         parse_annotations(runtime_visible_annotations,
2989                           runtime_visible_annotations_length,
2990                           parsed_annotations);
2991         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2992       } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
2993         if (runtime_invisible_annotations_exists) {
2994           classfile_parse_error(
2995             "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
2996         }
2997         runtime_invisible_annotations_exists = true;
2998         if (PreserveAllAnnotations) {
2999           runtime_invisible_annotations_length = attribute_length;
3000           runtime_invisible_annotations = cfs->get_u1_buffer();
3001           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3002         }
3003         cfs->skip_u1(attribute_length, CHECK);
3004       } else if (tag == vmSymbols::tag_enclosing_method()) {
3005         if (parsed_enclosingmethod_attribute) {
3006           classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3007         } else {
3008           parsed_enclosingmethod_attribute = true;
3009         }
3010         guarantee_property(attribute_length == 4,
3011           "Wrong EnclosingMethod attribute length %u in class file %s",
3012           attribute_length, CHECK);
3013         cfs->guarantee_more(4, CHECK);  // class_index, method_index
3014         enclosing_method_class_index  = cfs->get_u2_fast();
3015         enclosing_method_method_index = cfs->get_u2_fast();
3016         if (enclosing_method_class_index == 0) {
3017           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3018         }
3019         // Validate the constant pool indices and types
3020         check_property(valid_klass_reference_at(enclosing_method_class_index),
3021           "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3022         if (enclosing_method_method_index != 0 &&
3023             (!_cp->is_within_bounds(enclosing_method_method_index) ||
3024              !_cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3025           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3026         }
3027       } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3028                  _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3029         if (parsed_bootstrap_methods_attribute)
3030           classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3031         parsed_bootstrap_methods_attribute = true;
3032         parse_classfile_bootstrap_methods_attribute(attribute_length, CHECK);
3033       } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3034         if (runtime_visible_type_annotations != NULL) {
3035           classfile_parse_error(
3036             "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3037         }
3038         runtime_visible_type_annotations_length = attribute_length;
3039         runtime_visible_type_annotations = cfs->get_u1_buffer();
3040         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3041         // No need for the VM to parse Type annotations
3042         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3043       } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3044         if (runtime_invisible_type_annotations_exists) {
3045           classfile_parse_error(
3046             "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3047         } else {
3048           runtime_invisible_type_annotations_exists = true;
3049         }
3050         if (PreserveAllAnnotations) {
3051           runtime_invisible_type_annotations_length = attribute_length;
3052           runtime_invisible_type_annotations = cfs->get_u1_buffer();
3053           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3054         }
3055         cfs->skip_u1(attribute_length, CHECK);
3056       } else {
3057         // Unknown attribute
3058         cfs->skip_u1(attribute_length, CHECK);
3059       }
3060     } else {
3061       // Unknown attribute
3062       cfs->skip_u1(attribute_length, CHECK);
3063     }
3064   }
3065   _annotations = assemble_annotations(runtime_visible_annotations,
3066                                       runtime_visible_annotations_length,
3067                                       runtime_invisible_annotations,
3068                                       runtime_invisible_annotations_length,
3069                                       CHECK);
3070   _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3071                                            runtime_visible_type_annotations_length,
3072                                            runtime_invisible_type_annotations,
3073                                            runtime_invisible_type_annotations_length,
3074                                            CHECK);
3075 
3076   if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3077     u2 num_of_classes = parse_classfile_inner_classes_attribute(
3078                             inner_classes_attribute_start,
3079                             parsed_innerclasses_attribute,
3080                             enclosing_method_class_index,
3081                             enclosing_method_method_index,
3082                             CHECK);
3083     if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3084       guarantee_property(
3085         inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3086         "Wrong InnerClasses attribute length in class file %s", CHECK);
3087     }
3088   }
3089 
3090   if (_max_bootstrap_specifier_index >= 0) {
3091     guarantee_property(parsed_bootstrap_methods_attribute,
3092                        "Missing BootstrapMethods attribute in class file %s", CHECK);
3093   }
3094 }
3095 
3096 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
3097   if (_synthetic_flag)
3098     k->set_is_synthetic();
3099   if (_sourcefile_index != 0) {
3100     k->set_source_file_name_index(_sourcefile_index);
3101   }
3102   if (_generic_signature_index != 0) {
3103     k->set_generic_signature_index(_generic_signature_index);
3104   }
3105   if (_sde_buffer != NULL) {
3106     k->set_source_debug_extension(_sde_buffer, _sde_length);
3107   }
3108 }
3109 
3110 // Create the Annotations object that will
3111 // hold the annotations array for the Klass.
3112 void ClassFileParser::create_combined_annotations(TRAPS) {
3113     if (_annotations == NULL &&
3114         _type_annotations == NULL &&
3115         _fields_annotations == NULL &&
3116         _fields_type_annotations == NULL) {
3117       // Don't create the Annotations object unnecessarily.
3118       return;
3119     }
3120 
3121     Annotations* annotations = Annotations::allocate(_loader_data, CHECK);
3122     annotations->set_class_annotations(_annotations);
3123     annotations->set_class_type_annotations(_type_annotations);
3124     annotations->set_fields_annotations(_fields_annotations);
3125     annotations->set_fields_type_annotations(_fields_type_annotations);
3126 
3127     // This is the Annotations object that will be
3128     // assigned to InstanceKlass being constructed.
3129     _combined_annotations = annotations;
3130 
3131     // The annotations arrays below has been transfered the
3132     // _combined_annotations so these fields can now be cleared.
3133     _annotations             = NULL;
3134     _type_annotations        = NULL;
3135     _fields_annotations      = NULL;
3136     _fields_type_annotations = NULL;
3137 }
3138 
3139 // Transfer ownership of metadata allocated to the InstanceKlass.
3140 void ClassFileParser::apply_parsed_class_metadata(
3141                                             instanceKlassHandle this_klass,
3142                                             int java_fields_count, TRAPS) {
3143   _cp->set_pool_holder(this_klass());
3144   this_klass->set_constants(_cp);
3145   this_klass->set_fields(_fields, java_fields_count);
3146   this_klass->set_methods(_methods);
3147   this_klass->set_inner_classes(_inner_classes);
3148   this_klass->set_local_interfaces(_local_interfaces);
3149   this_klass->set_transitive_interfaces(_transitive_interfaces);
3150   this_klass->set_annotations(_combined_annotations);
3151 
3152   // Clear out these fields so they don't get deallocated by the destructor
3153   clear_class_metadata();
3154 }
3155 
3156 AnnotationArray* ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
3157                                                        int runtime_visible_annotations_length,
3158                                                        u1* runtime_invisible_annotations,
3159                                                        int runtime_invisible_annotations_length, TRAPS) {
3160   AnnotationArray* annotations = NULL;
3161   if (runtime_visible_annotations != NULL ||
3162       runtime_invisible_annotations != NULL) {
3163     annotations = MetadataFactory::new_array<u1>(_loader_data,
3164                                           runtime_visible_annotations_length +
3165                                           runtime_invisible_annotations_length,
3166                                           CHECK_(annotations));
3167     if (runtime_visible_annotations != NULL) {
3168       for (int i = 0; i < runtime_visible_annotations_length; i++) {
3169         annotations->at_put(i, runtime_visible_annotations[i]);
3170       }
3171     }
3172     if (runtime_invisible_annotations != NULL) {
3173       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3174         int append = runtime_visible_annotations_length+i;
3175         annotations->at_put(append, runtime_invisible_annotations[i]);
3176       }
3177     }
3178   }
3179   return annotations;
3180 }
3181 
3182 instanceKlassHandle ClassFileParser::parse_super_class(int super_class_index,
3183                                                        TRAPS) {
3184   instanceKlassHandle super_klass;
3185   if (super_class_index == 0) {
3186     check_property(_class_name == vmSymbols::java_lang_Object(),
3187                    "Invalid superclass index %u in class file %s",
3188                    super_class_index,
3189                    CHECK_NULL);
3190   } else {
3191     check_property(valid_klass_reference_at(super_class_index),
3192                    "Invalid superclass index %u in class file %s",
3193                    super_class_index,
3194                    CHECK_NULL);
3195     // The class name should be legal because it is checked when parsing constant pool.
3196     // However, make sure it is not an array type.
3197     bool is_array = false;
3198     if (_cp->tag_at(super_class_index).is_klass()) {
3199       super_klass = instanceKlassHandle(THREAD, _cp->resolved_klass_at(super_class_index));
3200       if (_need_verify) {
3201         is_array = super_klass->is_array_klass();
3202       }
3203     } else if (_need_verify) {
3204       is_array = (_cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3205     }
3206     if (_need_verify) {
3207       guarantee_property(!is_array,
3208                         "Bad superclass name in class file %s", CHECK_NULL);
3209     }
3210   }
3211   return super_klass;
3212 }
3213 
3214 
3215 // Values needed for oopmap and InstanceKlass creation
3216 class FieldLayoutInfo : public StackObj {
3217  public:
3218   int*          nonstatic_oop_offsets;
3219   unsigned int* nonstatic_oop_counts;
3220   unsigned int  nonstatic_oop_map_count;
3221   unsigned int  total_oop_map_count;
3222   int           instance_size;
3223   int           nonstatic_field_size;
3224   int           static_field_size;
3225   bool          has_nonstatic_fields;
3226 };
3227 
3228 // Layout fields and fill in FieldLayoutInfo.  Could use more refactoring!
3229 void ClassFileParser::layout_fields(Handle class_loader,
3230                                     FieldAllocationCount* fac,
3231                                     ClassAnnotationCollector* parsed_annotations,
3232                                     FieldLayoutInfo* info,
3233                                     TRAPS) {
3234 
3235   // Field size and offset computation
3236   int nonstatic_field_size = _super_klass() == NULL ? 0 : _super_klass()->nonstatic_field_size();
3237   int next_static_oop_offset = 0;
3238   int next_static_double_offset = 0;
3239   int next_static_word_offset = 0;
3240   int next_static_short_offset = 0;
3241   int next_static_byte_offset = 0;
3242   int next_nonstatic_oop_offset = 0;
3243   int next_nonstatic_double_offset = 0;
3244   int next_nonstatic_word_offset = 0;
3245   int next_nonstatic_short_offset = 0;
3246   int next_nonstatic_byte_offset = 0;
3247   int first_nonstatic_oop_offset = 0;
3248   int next_nonstatic_field_offset = 0;
3249   int next_nonstatic_padded_offset = 0;
3250 
3251   // Count the contended fields by type.
3252   //
3253   // We ignore static fields, because @Contended is not supported for them.
3254   // The layout code below will also ignore the static fields.
3255   int nonstatic_contended_count = 0;
3256   FieldAllocationCount fac_contended;
3257   for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3258     FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3259     if (fs.is_contended()) {
3260       fac_contended.count[atype]++;
3261       if (!fs.access_flags().is_static()) {
3262         nonstatic_contended_count++;
3263       }
3264     }
3265   }
3266 
3267 
3268   // Calculate the starting byte offsets
3269   next_static_oop_offset      = InstanceMirrorKlass::offset_of_static_fields();
3270   next_static_double_offset   = next_static_oop_offset +
3271                                 ((fac->count[STATIC_OOP]) * heapOopSize);
3272   if ( fac->count[STATIC_DOUBLE] &&
3273        (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3274         Universe::field_type_should_be_aligned(T_LONG)) ) {
3275     next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3276   }
3277 
3278   next_static_word_offset     = next_static_double_offset +
3279                                 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3280   next_static_short_offset    = next_static_word_offset +
3281                                 ((fac->count[STATIC_WORD]) * BytesPerInt);
3282   next_static_byte_offset     = next_static_short_offset +
3283                                 ((fac->count[STATIC_SHORT]) * BytesPerShort);
3284 
3285   int nonstatic_fields_start  = instanceOopDesc::base_offset_in_bytes() +
3286                                 nonstatic_field_size * heapOopSize;
3287 
3288   next_nonstatic_field_offset = nonstatic_fields_start;
3289 
3290   bool is_contended_class     = parsed_annotations->is_contended();
3291 
3292   // Class is contended, pad before all the fields
3293   if (is_contended_class) {
3294     next_nonstatic_field_offset += ContendedPaddingWidth;
3295   }
3296 
3297   // Compute the non-contended fields count.
3298   // The packing code below relies on these counts to determine if some field
3299   // can be squeezed into the alignment gap. Contended fields are obviously
3300   // exempt from that.
3301   unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3302   unsigned int nonstatic_word_count   = fac->count[NONSTATIC_WORD]   - fac_contended.count[NONSTATIC_WORD];
3303   unsigned int nonstatic_short_count  = fac->count[NONSTATIC_SHORT]  - fac_contended.count[NONSTATIC_SHORT];
3304   unsigned int nonstatic_byte_count   = fac->count[NONSTATIC_BYTE]   - fac_contended.count[NONSTATIC_BYTE];
3305   unsigned int nonstatic_oop_count    = fac->count[NONSTATIC_OOP]    - fac_contended.count[NONSTATIC_OOP];
3306 
3307   // Total non-static fields count, including every contended field
3308   unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3309                                         fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3310                                         fac->count[NONSTATIC_OOP];
3311 
3312   bool super_has_nonstatic_fields =
3313           (_super_klass() != NULL && _super_klass->has_nonstatic_fields());
3314   bool has_nonstatic_fields = super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3315 
3316 
3317   // Prepare list of oops for oop map generation.
3318   //
3319   // "offset" and "count" lists are describing the set of contiguous oop
3320   // regions. offset[i] is the start of the i-th region, which then has
3321   // count[i] oops following. Before we know how many regions are required,
3322   // we pessimistically allocate the maps to fit all the oops into the
3323   // distinct regions.
3324   //
3325   // TODO: We add +1 to always allocate non-zero resource arrays; we need
3326   // to figure out if we still need to do this.
3327   int* nonstatic_oop_offsets;
3328   unsigned int* nonstatic_oop_counts;
3329   unsigned int nonstatic_oop_map_count = 0;
3330   unsigned int max_nonstatic_oop_maps  = fac->count[NONSTATIC_OOP] + 1;
3331 
3332   nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3333             THREAD, int, max_nonstatic_oop_maps);
3334   nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
3335             THREAD, unsigned int, max_nonstatic_oop_maps);
3336 
3337   first_nonstatic_oop_offset = 0; // will be set for first oop field
3338 
3339   bool compact_fields   = CompactFields;
3340   int  allocation_style = FieldsAllocationStyle;
3341   if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3342     assert(false, "0 <= FieldsAllocationStyle <= 2");
3343     allocation_style = 1; // Optimistic
3344   }
3345 
3346   // The next classes have predefined hard-coded fields offsets
3347   // (see in JavaClasses::compute_hard_coded_offsets()).
3348   // Use default fields allocation order for them.
3349   if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3350       (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3351        _class_name == vmSymbols::java_lang_Class() ||
3352        _class_name == vmSymbols::java_lang_ClassLoader() ||
3353        _class_name == vmSymbols::java_lang_ref_Reference() ||
3354        _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3355        _class_name == vmSymbols::java_lang_StackTraceElement() ||
3356        _class_name == vmSymbols::java_lang_String() ||
3357        _class_name == vmSymbols::java_lang_Throwable() ||
3358        _class_name == vmSymbols::java_lang_Boolean() ||
3359        _class_name == vmSymbols::java_lang_Character() ||
3360        _class_name == vmSymbols::java_lang_Float() ||
3361        _class_name == vmSymbols::java_lang_Double() ||
3362        _class_name == vmSymbols::java_lang_Byte() ||
3363        _class_name == vmSymbols::java_lang_Short() ||
3364        _class_name == vmSymbols::java_lang_Integer() ||
3365        _class_name == vmSymbols::java_lang_Long())) {
3366     allocation_style = 0;     // Allocate oops first
3367     compact_fields   = false; // Don't compact fields
3368   }
3369 
3370   // Rearrange fields for a given allocation style
3371   if( allocation_style == 0 ) {
3372     // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3373     next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3374     next_nonstatic_double_offset = next_nonstatic_oop_offset +
3375                                     (nonstatic_oop_count * heapOopSize);
3376   } else if( allocation_style == 1 ) {
3377     // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3378     next_nonstatic_double_offset = next_nonstatic_field_offset;
3379   } else if( allocation_style == 2 ) {
3380     // Fields allocation: oops fields in super and sub classes are together.
3381     if( nonstatic_field_size > 0 && _super_klass() != NULL &&
3382         _super_klass->nonstatic_oop_map_size() > 0 ) {
3383       unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3384       OopMapBlock* first_map = _super_klass->start_of_nonstatic_oop_maps();
3385       OopMapBlock* last_map = first_map + map_count - 1;
3386       int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3387       if (next_offset == next_nonstatic_field_offset) {
3388         allocation_style = 0;   // allocate oops first
3389         next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3390         next_nonstatic_double_offset = next_nonstatic_oop_offset +
3391                                        (nonstatic_oop_count * heapOopSize);
3392       }
3393     }
3394     if( allocation_style == 2 ) {
3395       allocation_style = 1;     // allocate oops last
3396       next_nonstatic_double_offset = next_nonstatic_field_offset;
3397     }
3398   } else {
3399     ShouldNotReachHere();
3400   }
3401 
3402   int nonstatic_oop_space_count    = 0;
3403   int nonstatic_word_space_count   = 0;
3404   int nonstatic_short_space_count  = 0;
3405   int nonstatic_byte_space_count   = 0;
3406   int nonstatic_oop_space_offset   = 0;
3407   int nonstatic_word_space_offset  = 0;
3408   int nonstatic_short_space_offset = 0;
3409   int nonstatic_byte_space_offset  = 0;
3410 
3411   // Try to squeeze some of the fields into the gaps due to
3412   // long/double alignment.
3413   if( nonstatic_double_count > 0 ) {
3414     int offset = next_nonstatic_double_offset;
3415     next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3416     if( compact_fields && offset != next_nonstatic_double_offset ) {
3417       // Allocate available fields into the gap before double field.
3418       int length = next_nonstatic_double_offset - offset;
3419       assert(length == BytesPerInt, "");
3420       nonstatic_word_space_offset = offset;
3421       if( nonstatic_word_count > 0 ) {
3422         nonstatic_word_count      -= 1;
3423         nonstatic_word_space_count = 1; // Only one will fit
3424         length -= BytesPerInt;
3425         offset += BytesPerInt;
3426       }
3427       nonstatic_short_space_offset = offset;
3428       while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3429         nonstatic_short_count       -= 1;
3430         nonstatic_short_space_count += 1;
3431         length -= BytesPerShort;
3432         offset += BytesPerShort;
3433       }
3434       nonstatic_byte_space_offset = offset;
3435       while( length > 0 && nonstatic_byte_count > 0 ) {
3436         nonstatic_byte_count       -= 1;
3437         nonstatic_byte_space_count += 1;
3438         length -= 1;
3439       }
3440       // Allocate oop field in the gap if there are no other fields for that.
3441       nonstatic_oop_space_offset = offset;
3442       if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3443           allocation_style != 0 ) { // when oop fields not first
3444         nonstatic_oop_count      -= 1;
3445         nonstatic_oop_space_count = 1; // Only one will fit
3446         length -= heapOopSize;
3447         offset += heapOopSize;
3448       }
3449     }
3450   }
3451 
3452   next_nonstatic_word_offset  = next_nonstatic_double_offset +
3453                                 (nonstatic_double_count * BytesPerLong);
3454   next_nonstatic_short_offset = next_nonstatic_word_offset +
3455                                 (nonstatic_word_count * BytesPerInt);
3456   next_nonstatic_byte_offset  = next_nonstatic_short_offset +
3457                                 (nonstatic_short_count * BytesPerShort);
3458   next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3459                                 nonstatic_byte_count;
3460 
3461   // let oops jump before padding with this allocation style
3462   if( allocation_style == 1 ) {
3463     next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3464     if( nonstatic_oop_count > 0 ) {
3465       next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3466     }
3467     next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3468   }
3469 
3470   // Iterate over fields again and compute correct offsets.
3471   // The field allocation type was temporarily stored in the offset slot.
3472   // oop fields are located before non-oop fields (static and non-static).
3473   for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3474 
3475     // skip already laid out fields
3476     if (fs.is_offset_set()) continue;
3477 
3478     // contended instance fields are handled below
3479     if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3480 
3481     int real_offset = 0;
3482     FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3483 
3484     // pack the rest of the fields
3485     switch (atype) {
3486       case STATIC_OOP:
3487         real_offset = next_static_oop_offset;
3488         next_static_oop_offset += heapOopSize;
3489         break;
3490       case STATIC_BYTE:
3491         real_offset = next_static_byte_offset;
3492         next_static_byte_offset += 1;
3493         break;
3494       case STATIC_SHORT:
3495         real_offset = next_static_short_offset;
3496         next_static_short_offset += BytesPerShort;
3497         break;
3498       case STATIC_WORD:
3499         real_offset = next_static_word_offset;
3500         next_static_word_offset += BytesPerInt;
3501         break;
3502       case STATIC_DOUBLE:
3503         real_offset = next_static_double_offset;
3504         next_static_double_offset += BytesPerLong;
3505         break;
3506       case NONSTATIC_OOP:
3507         if( nonstatic_oop_space_count > 0 ) {
3508           real_offset = nonstatic_oop_space_offset;
3509           nonstatic_oop_space_offset += heapOopSize;
3510           nonstatic_oop_space_count  -= 1;
3511         } else {
3512           real_offset = next_nonstatic_oop_offset;
3513           next_nonstatic_oop_offset += heapOopSize;
3514         }
3515 
3516         // Record this oop in the oop maps
3517         if( nonstatic_oop_map_count > 0 &&
3518             nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3519             real_offset -
3520             int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3521             heapOopSize ) {
3522           // This oop is adjacent to the previous one, add to current oop map
3523           assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3524           nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3525         } else {
3526           // This oop is not adjacent to the previous one, create new oop map
3527           assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3528           nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3529           nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3530           nonstatic_oop_map_count += 1;
3531           if( first_nonstatic_oop_offset == 0 ) { // Undefined
3532             first_nonstatic_oop_offset = real_offset;
3533           }
3534         }
3535         break;
3536       case NONSTATIC_BYTE:
3537         if( nonstatic_byte_space_count > 0 ) {
3538           real_offset = nonstatic_byte_space_offset;
3539           nonstatic_byte_space_offset += 1;
3540           nonstatic_byte_space_count  -= 1;
3541         } else {
3542           real_offset = next_nonstatic_byte_offset;
3543           next_nonstatic_byte_offset += 1;
3544         }
3545         break;
3546       case NONSTATIC_SHORT:
3547         if( nonstatic_short_space_count > 0 ) {
3548           real_offset = nonstatic_short_space_offset;
3549           nonstatic_short_space_offset += BytesPerShort;
3550           nonstatic_short_space_count  -= 1;
3551         } else {
3552           real_offset = next_nonstatic_short_offset;
3553           next_nonstatic_short_offset += BytesPerShort;
3554         }
3555         break;
3556       case NONSTATIC_WORD:
3557         if( nonstatic_word_space_count > 0 ) {
3558           real_offset = nonstatic_word_space_offset;
3559           nonstatic_word_space_offset += BytesPerInt;
3560           nonstatic_word_space_count  -= 1;
3561         } else {
3562           real_offset = next_nonstatic_word_offset;
3563           next_nonstatic_word_offset += BytesPerInt;
3564         }
3565         break;
3566       case NONSTATIC_DOUBLE:
3567         real_offset = next_nonstatic_double_offset;
3568         next_nonstatic_double_offset += BytesPerLong;
3569         break;
3570       default:
3571         ShouldNotReachHere();
3572     }
3573     fs.set_offset(real_offset);
3574   }
3575 
3576 
3577   // Handle the contended cases.
3578   //
3579   // Each contended field should not intersect the cache line with another contended field.
3580   // In the absence of alignment information, we end up with pessimistically separating
3581   // the fields with full-width padding.
3582   //
3583   // Additionally, this should not break alignment for the fields, so we round the alignment up
3584   // for each field.
3585   if (nonstatic_contended_count > 0) {
3586 
3587     // if there is at least one contended field, we need to have pre-padding for them
3588     next_nonstatic_padded_offset += ContendedPaddingWidth;
3589 
3590     // collect all contended groups
3591     BitMap bm(_cp->size());
3592     for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3593       // skip already laid out fields
3594       if (fs.is_offset_set()) continue;
3595 
3596       if (fs.is_contended()) {
3597         bm.set_bit(fs.contended_group());
3598       }
3599     }
3600 
3601     int current_group = -1;
3602     while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3603 
3604       for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
3605 
3606         // skip already laid out fields
3607         if (fs.is_offset_set()) continue;
3608 
3609         // skip non-contended fields and fields from different group
3610         if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3611 
3612         // handle statics below
3613         if (fs.access_flags().is_static()) continue;
3614 
3615         int real_offset = 0;
3616         FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3617 
3618         switch (atype) {
3619           case NONSTATIC_BYTE:
3620             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
3621             real_offset = next_nonstatic_padded_offset;
3622             next_nonstatic_padded_offset += 1;
3623             break;
3624 
3625           case NONSTATIC_SHORT:
3626             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
3627             real_offset = next_nonstatic_padded_offset;
3628             next_nonstatic_padded_offset += BytesPerShort;
3629             break;
3630 
3631           case NONSTATIC_WORD:
3632             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
3633             real_offset = next_nonstatic_padded_offset;
3634             next_nonstatic_padded_offset += BytesPerInt;
3635             break;
3636 
3637           case NONSTATIC_DOUBLE:
3638             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
3639             real_offset = next_nonstatic_padded_offset;
3640             next_nonstatic_padded_offset += BytesPerLong;
3641             break;
3642 
3643           case NONSTATIC_OOP:
3644             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
3645             real_offset = next_nonstatic_padded_offset;
3646             next_nonstatic_padded_offset += heapOopSize;
3647 
3648             // Record this oop in the oop maps
3649             if( nonstatic_oop_map_count > 0 &&
3650                 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3651                 real_offset -
3652                 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3653                 heapOopSize ) {
3654               // This oop is adjacent to the previous one, add to current oop map
3655               assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3656               nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3657             } else {
3658               // This oop is not adjacent to the previous one, create new oop map
3659               assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3660               nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3661               nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3662               nonstatic_oop_map_count += 1;
3663               if( first_nonstatic_oop_offset == 0 ) { // Undefined
3664                 first_nonstatic_oop_offset = real_offset;
3665               }
3666             }
3667             break;
3668 
3669           default:
3670             ShouldNotReachHere();
3671         }
3672 
3673         if (fs.contended_group() == 0) {
3674           // Contended group defines the equivalence class over the fields:
3675           // the fields within the same contended group are not inter-padded.
3676           // The only exception is default group, which does not incur the
3677           // equivalence, and so requires intra-padding.
3678           next_nonstatic_padded_offset += ContendedPaddingWidth;
3679         }
3680 
3681         fs.set_offset(real_offset);
3682       } // for
3683 
3684       // Start laying out the next group.
3685       // Note that this will effectively pad the last group in the back;
3686       // this is expected to alleviate memory contention effects for
3687       // subclass fields and/or adjacent object.
3688       // If this was the default group, the padding is already in place.
3689       if (current_group != 0) {
3690         next_nonstatic_padded_offset += ContendedPaddingWidth;
3691       }
3692     }
3693 
3694     // handle static fields
3695   }
3696 
3697   // Entire class is contended, pad in the back.
3698   // This helps to alleviate memory contention effects for subclass fields
3699   // and/or adjacent object.
3700   if (is_contended_class) {
3701     next_nonstatic_padded_offset += ContendedPaddingWidth;
3702   }
3703 
3704   int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
3705 
3706   int nonstatic_fields_end      = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
3707   int instance_end              = align_size_up(notaligned_nonstatic_fields_end, wordSize);
3708   int static_fields_end         = align_size_up(next_static_byte_offset, wordSize);
3709 
3710   int static_field_size         = (static_fields_end -
3711                                    InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
3712   nonstatic_field_size          = nonstatic_field_size +
3713                                   (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
3714 
3715   int instance_size             = align_object_size(instance_end / wordSize);
3716 
3717   assert(instance_size == align_object_size(align_size_up(
3718          (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
3719           wordSize) / wordSize), "consistent layout helper value");
3720 
3721   // Invariant: nonstatic_field end/start should only change if there are
3722   // nonstatic fields in the class, or if the class is contended. We compare
3723   // against the non-aligned value, so that end alignment will not fail the
3724   // assert without actually having the fields.
3725   assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
3726          is_contended_class ||
3727          (nonstatic_fields_count > 0), "double-check nonstatic start/end");
3728 
3729   // Number of non-static oop map blocks allocated at end of klass.
3730   const unsigned int total_oop_map_count =
3731     compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
3732                           first_nonstatic_oop_offset);
3733 
3734 #ifndef PRODUCT
3735   if (PrintFieldLayout) {
3736     print_field_layout(_class_name,
3737           _fields,
3738           _cp,
3739           instance_size,
3740           nonstatic_fields_start,
3741           nonstatic_fields_end,
3742           static_fields_end);
3743   }
3744 
3745 #endif
3746   // Pass back information needed for InstanceKlass creation
3747   info->nonstatic_oop_offsets = nonstatic_oop_offsets;
3748   info->nonstatic_oop_counts = nonstatic_oop_counts;
3749   info->nonstatic_oop_map_count = nonstatic_oop_map_count;
3750   info->total_oop_map_count = total_oop_map_count;
3751   info->instance_size = instance_size;
3752   info->static_field_size = static_field_size;
3753   info->nonstatic_field_size = nonstatic_field_size;
3754   info->has_nonstatic_fields = has_nonstatic_fields;
3755 }
3756 
3757 
3758 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
3759                                                     ClassLoaderData* loader_data,
3760                                                     Handle protection_domain,
3761                                                     KlassHandle host_klass,
3762                                                     GrowableArray<Handle>* cp_patches,
3763                                                     TempNewSymbol& parsed_name,
3764                                                     bool verify,
3765                                                     TRAPS) {
3766 
3767   // When a retransformable agent is attached, JVMTI caches the
3768   // class bytes that existed before the first retransformation.
3769   // If RedefineClasses() was used before the retransformable
3770   // agent attached, then the cached class bytes may not be the
3771   // original class bytes.
3772   JvmtiCachedClassFileData *cached_class_file = NULL;
3773   Handle class_loader(THREAD, loader_data->class_loader());
3774   bool has_default_methods = false;
3775   bool declares_default_methods = false;
3776   ResourceMark rm(THREAD);
3777 
3778   ClassFileStream* cfs = stream();
3779   // Timing
3780   assert(THREAD->is_Java_thread(), "must be a JavaThread");
3781   JavaThread* jt = (JavaThread*) THREAD;
3782 
3783   PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
3784                             ClassLoader::perf_class_parse_selftime(),
3785                             NULL,
3786                             jt->get_thread_stat()->perf_recursion_counts_addr(),
3787                             jt->get_thread_stat()->perf_timers_addr(),
3788                             PerfClassTraceTime::PARSE_CLASS);
3789 
3790   init_parsed_class_attributes(loader_data);
3791 
3792   if (JvmtiExport::should_post_class_file_load_hook()) {
3793     // Get the cached class file bytes (if any) from the class that
3794     // is being redefined or retransformed. We use jvmti_thread_state()
3795     // instead of JvmtiThreadState::state_for(jt) so we don't allocate
3796     // a JvmtiThreadState any earlier than necessary. This will help
3797     // avoid the bug described by 7126851.
3798     JvmtiThreadState *state = jt->jvmti_thread_state();
3799     if (state != NULL) {
3800       KlassHandle *h_class_being_redefined =
3801                      state->get_class_being_redefined();
3802       if (h_class_being_redefined != NULL) {
3803         instanceKlassHandle ikh_class_being_redefined =
3804           instanceKlassHandle(THREAD, (*h_class_being_redefined)());
3805         cached_class_file = ikh_class_being_redefined->get_cached_class_file();
3806       }
3807     }
3808 
3809     unsigned char* ptr = cfs->buffer();
3810     unsigned char* end_ptr = cfs->buffer() + cfs->length();
3811 
3812     JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain,
3813                                            &ptr, &end_ptr, &cached_class_file);
3814 
3815     if (ptr != cfs->buffer()) {
3816       // JVMTI agent has modified class file data.
3817       // Set new class file stream using JVMTI agent modified
3818       // class file data.
3819       cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
3820       set_stream(cfs);
3821     }
3822   }
3823 
3824   _host_klass = host_klass;
3825   _cp_patches = cp_patches;
3826 
3827   instanceKlassHandle nullHandle;
3828 
3829   // Figure out whether we can skip format checking (matching classic VM behavior)
3830   if (DumpSharedSpaces) {
3831     // verify == true means it's a 'remote' class (i.e., non-boot class)
3832     // Verification decision is based on BytecodeVerificationRemote flag
3833     // for those classes.
3834     _need_verify = (verify) ? BytecodeVerificationRemote :
3835                               BytecodeVerificationLocal;
3836   } else {
3837     _need_verify = Verifier::should_verify_for(class_loader(), verify);
3838   }
3839 
3840   // Set the verify flag in stream
3841   cfs->set_verify(_need_verify);
3842 
3843   // Save the class file name for easier error message printing.
3844   _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
3845 
3846   cfs->guarantee_more(8, CHECK_(nullHandle));  // magic, major, minor
3847   // Magic value
3848   u4 magic = cfs->get_u4_fast();
3849   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
3850                      "Incompatible magic value %u in class file %s",
3851                      magic, CHECK_(nullHandle));
3852 
3853   // Version numbers
3854   u2 minor_version = cfs->get_u2_fast();
3855   u2 major_version = cfs->get_u2_fast();
3856 
3857   if (DumpSharedSpaces && major_version < JAVA_1_5_VERSION) {
3858     ResourceMark rm;
3859     warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
3860             major_version,  minor_version, name->as_C_string());
3861     Exceptions::fthrow(
3862       THREAD_AND_LOCATION,
3863       vmSymbols::java_lang_UnsupportedClassVersionError(),
3864       "Unsupported major.minor version for dump time %u.%u",
3865       major_version,
3866       minor_version);
3867   }
3868 
3869   // Check version numbers - we check this even with verifier off
3870   if (!is_supported_version(major_version, minor_version)) {
3871     if (name == NULL) {
3872       Exceptions::fthrow(
3873         THREAD_AND_LOCATION,
3874         vmSymbols::java_lang_UnsupportedClassVersionError(),
3875         "Unsupported class file version %u.%u, "
3876         "this version of the Java Runtime only recognizes class file versions up to %u.%u",
3877         major_version,
3878         minor_version,
3879         JAVA_MAX_SUPPORTED_VERSION,
3880         JAVA_MAX_SUPPORTED_MINOR_VERSION);
3881     } else {
3882       ResourceMark rm(THREAD);
3883       Exceptions::fthrow(
3884         THREAD_AND_LOCATION,
3885         vmSymbols::java_lang_UnsupportedClassVersionError(),
3886         "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
3887         "this version of the Java Runtime only recognizes class file versions up to %u.%u",
3888         name->as_C_string(),
3889         major_version,
3890         minor_version,
3891         JAVA_MAX_SUPPORTED_VERSION,
3892         JAVA_MAX_SUPPORTED_MINOR_VERSION);
3893     }
3894     return nullHandle;
3895   }
3896 
3897   _major_version = major_version;
3898   _minor_version = minor_version;
3899 
3900 
3901   // Check if verification needs to be relaxed for this class file
3902   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3903   _relax_verify = Verifier::relax_verify_for(class_loader());
3904 
3905   // Constant pool
3906   constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
3907 
3908   int cp_size = cp->length();
3909 
3910   cfs->guarantee_more(8, CHECK_(nullHandle));  // flags, this_class, super_class, infs_len
3911 
3912   // Access flags
3913   AccessFlags access_flags;
3914   jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3915 
3916   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3917     // Set abstract bit for old class files for backward compatibility
3918     flags |= JVM_ACC_ABSTRACT;
3919   }
3920   verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3921   access_flags.set_flags(flags);
3922 
3923   // This class and superclass
3924   u2 this_class_index = cfs->get_u2_fast();
3925   check_property(
3926     valid_cp_range(this_class_index, cp_size) &&
3927       cp->tag_at(this_class_index).is_unresolved_klass(),
3928     "Invalid this class index %u in constant pool in class file %s",
3929     this_class_index, CHECK_(nullHandle));
3930 
3931   Symbol*  class_name  = cp->klass_name_at(this_class_index);
3932   assert(class_name != NULL, "class_name can't be null");
3933 
3934   // It's important to set parsed_name *before* resolving the super class.
3935   // (it's used for cleanup by the caller if parsing fails)
3936   parsed_name = class_name;
3937   // parsed_name is returned and can be used if there's an error, so add to
3938   // its reference count.  Caller will decrement the refcount.
3939   parsed_name->increment_refcount();
3940 
3941   // Update _class_name which could be null previously to be class_name
3942   _class_name = class_name;
3943 
3944   // Don't need to check whether this class name is legal or not.
3945   // It has been checked when constant pool is parsed.
3946   // However, make sure it is not an array type.
3947   if (_need_verify) {
3948     guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3949                        "Bad class name in class file %s",
3950                        CHECK_(nullHandle));
3951   }
3952 
3953   Klass* preserve_this_klass;   // for storing result across HandleMark
3954 
3955   // release all handles when parsing is done
3956   { HandleMark hm(THREAD);
3957 
3958     // Checks if name in class file matches requested name
3959     if (name != NULL && class_name != name) {
3960       ResourceMark rm(THREAD);
3961       Exceptions::fthrow(
3962         THREAD_AND_LOCATION,
3963         vmSymbols::java_lang_NoClassDefFoundError(),
3964         "%s (wrong name: %s)",
3965         name->as_C_string(),
3966         class_name->as_C_string()
3967       );
3968       return nullHandle;
3969     }
3970 
3971     if (TraceClassLoadingPreorder) {
3972       tty->print("[Loading %s", (name != NULL) ? name->as_klass_external_name() : "NoName");
3973       if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3974       tty->print_cr("]");
3975     }
3976 #if INCLUDE_CDS
3977     if (DumpLoadedClassList != NULL && cfs->source() != NULL && classlist_file->is_open()) {
3978       // Only dump the classes that can be stored into CDS archive
3979       if (SystemDictionaryShared::is_sharing_possible(loader_data)) {
3980         if (name != NULL) {
3981           ResourceMark rm(THREAD);
3982           classlist_file->print_cr("%s", name->as_C_string());
3983           classlist_file->flush();
3984         }
3985       }
3986     }
3987 #endif
3988 
3989     u2 super_class_index = cfs->get_u2_fast();
3990     instanceKlassHandle super_klass = parse_super_class(super_class_index,
3991                                                         CHECK_NULL);
3992 
3993     // Interfaces
3994     u2 itfs_len = cfs->get_u2_fast();
3995     Array<Klass*>* local_interfaces =
3996       parse_interfaces(itfs_len, protection_domain, _class_name,
3997                        &has_default_methods, CHECK_(nullHandle));
3998 
3999     u2 java_fields_count = 0;
4000     // Fields (offsets are filled in later)
4001     FieldAllocationCount fac;
4002     Array<u2>* fields = parse_fields(class_name,
4003                                      access_flags.is_interface(),
4004                                      &fac, &java_fields_count,
4005                                      CHECK_(nullHandle));
4006     // Methods
4007     bool has_final_method = false;
4008     AccessFlags promoted_flags;
4009     promoted_flags.set_flags(0);
4010     Array<Method*>* methods = parse_methods(access_flags.is_interface(),
4011                                             &promoted_flags,
4012                                             &has_final_method,
4013                                             &declares_default_methods,
4014                                             CHECK_(nullHandle));
4015 
4016     if (declares_default_methods) {
4017       has_default_methods = true;
4018     }
4019 
4020     // Additional attributes
4021     ClassAnnotationCollector parsed_annotations;
4022     parse_classfile_attributes(&parsed_annotations, CHECK_(nullHandle));
4023 
4024     // Finalize the Annotations metadata object,
4025     // now that all annotation arrays have been created.
4026     create_combined_annotations(CHECK_(nullHandle));
4027 
4028     // Make sure this is the end of class file stream
4029     guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
4030 
4031     // We check super class after class file is parsed and format is checked
4032     if (super_class_index > 0 && super_klass.is_null()) {
4033       Symbol*  sk  = cp->klass_name_at(super_class_index);
4034       if (access_flags.is_interface()) {
4035         // Before attempting to resolve the superclass, check for class format
4036         // errors not checked yet.
4037         guarantee_property(sk == vmSymbols::java_lang_Object(),
4038                            "Interfaces must have java.lang.Object as superclass in class file %s",
4039                            CHECK_(nullHandle));
4040       }
4041       Klass* k = SystemDictionary::resolve_super_or_fail(class_name, sk,
4042                                                          class_loader,
4043                                                          protection_domain,
4044                                                          true,
4045                                                          CHECK_(nullHandle));
4046 
4047       KlassHandle kh (THREAD, k);
4048       super_klass = instanceKlassHandle(THREAD, kh());
4049     }
4050     if (super_klass.not_null()) {
4051 
4052       if (super_klass->has_default_methods()) {
4053         has_default_methods = true;
4054       }
4055 
4056       if (super_klass->is_interface()) {
4057         ResourceMark rm(THREAD);
4058         Exceptions::fthrow(
4059           THREAD_AND_LOCATION,
4060           vmSymbols::java_lang_IncompatibleClassChangeError(),
4061           "class %s has interface %s as super class",
4062           class_name->as_klass_external_name(),
4063           super_klass->external_name()
4064         );
4065         return nullHandle;
4066       }
4067       // Make sure super class is not final
4068       if (super_klass->is_final()) {
4069         THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
4070       }
4071     }
4072 
4073     // save super klass for error handling.
4074     _super_klass = super_klass;
4075 
4076     // Compute the transitive list of all unique interfaces implemented by this class
4077     _transitive_interfaces =
4078           compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
4079 
4080     // sort methods
4081     intArray* method_ordering = sort_methods(methods);
4082 
4083     // promote flags from parse_methods() to the klass' flags
4084     access_flags.add_promoted_flags(promoted_flags.as_int());
4085 
4086     // Size of Java vtable (in words)
4087     int vtable_size = 0;
4088     int itable_size = 0;
4089     int num_miranda_methods = 0;
4090 
4091     GrowableArray<Method*> all_mirandas(20);
4092 
4093     klassVtable::compute_vtable_size_and_num_mirandas(
4094         &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods,
4095         access_flags, class_loader, class_name, local_interfaces,
4096                                                       CHECK_(nullHandle));
4097 
4098     // Size of Java itable (in words)
4099     itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(_transitive_interfaces);
4100 
4101     FieldLayoutInfo info;
4102     layout_fields(class_loader, &fac, &parsed_annotations, &info, CHECK_NULL);
4103 
4104     int total_oop_map_size2 =
4105           InstanceKlass::nonstatic_oop_map_size(info.total_oop_map_count);
4106 
4107     // Compute reference type
4108     ReferenceType rt;
4109     if (super_klass() == NULL) {
4110       rt = REF_NONE;
4111     } else {
4112       rt = super_klass->reference_type();
4113     }
4114 
4115     // We can now create the basic Klass* for this klass
4116     _klass = InstanceKlass::allocate_instance_klass(loader_data,
4117                                                     vtable_size,
4118                                                     itable_size,
4119                                                     info.static_field_size,
4120                                                     total_oop_map_size2,
4121                                                     rt,
4122                                                     access_flags,
4123                                                     name,
4124                                                     super_klass(),
4125                                                     !host_klass.is_null(),
4126                                                     CHECK_(nullHandle));
4127     instanceKlassHandle this_klass (THREAD, _klass);
4128 
4129     assert(this_klass->static_field_size() == info.static_field_size, "sanity");
4130     assert(this_klass->nonstatic_oop_map_count() == info.total_oop_map_count,
4131            "sanity");
4132 
4133     // Fill in information already parsed
4134     this_klass->set_should_verify_class(verify);
4135     jint lh = Klass::instance_layout_helper(info.instance_size, false);
4136     this_klass->set_layout_helper(lh);
4137     assert(this_klass->is_instance_klass(), "layout is correct");
4138     assert(this_klass->size_helper() == info.instance_size, "correct size_helper");
4139     // Not yet: supers are done below to support the new subtype-checking fields
4140     //this_klass->set_super(super_klass());
4141     this_klass->set_class_loader_data(loader_data);
4142     this_klass->set_nonstatic_field_size(info.nonstatic_field_size);
4143     this_klass->set_has_nonstatic_fields(info.has_nonstatic_fields);
4144     this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
4145 
4146     apply_parsed_class_metadata(this_klass, java_fields_count, CHECK_NULL);
4147 
4148     if (has_final_method) {
4149       this_klass->set_has_final_method();
4150     }
4151     this_klass->copy_method_ordering(method_ordering, CHECK_NULL);
4152     // The InstanceKlass::_methods_jmethod_ids cache
4153     // is managed on the assumption that the initial cache
4154     // size is equal to the number of methods in the class. If
4155     // that changes, then InstanceKlass::idnum_can_increment()
4156     // has to be changed accordingly.
4157     this_klass->set_initial_method_idnum(methods->length());
4158     this_klass->set_name(cp->klass_name_at(this_class_index));
4159     if (is_anonymous())  // I am well known to myself
4160       cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
4161 
4162     this_klass->set_minor_version(minor_version);
4163     this_klass->set_major_version(major_version);
4164     this_klass->set_has_default_methods(has_default_methods);
4165     this_klass->set_declares_default_methods(declares_default_methods);
4166 
4167     if (!host_klass.is_null()) {
4168       assert (this_klass->is_anonymous(), "should be the same");
4169       this_klass->set_host_klass(host_klass());
4170     }
4171 
4172     // Set up Method*::intrinsic_id as soon as we know the names of methods.
4173     // (We used to do this lazily, but now we query it in Rewriter,
4174     // which is eagerly done for every method, so we might as well do it now,
4175     // when everything is fresh in memory.)
4176     vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(this_klass());
4177     if (klass_id != vmSymbols::NO_SID) {
4178       for (int j = 0; j < methods->length(); j++) {
4179         Method* method = methods->at(j);
4180         method->init_intrinsic_id();
4181 
4182         if (CheckIntrinsics) {
4183           // Check if an intrinsic is defined for method 'method',
4184           // but the method is not annotated with @HotSpotIntrinsicCandidate.
4185           if (method->intrinsic_id() != vmIntrinsics::_none &&
4186               !method->intrinsic_candidate()) {
4187             tty->print("Compiler intrinsic is defined for method [%s], "
4188                        "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
4189                        method->name_and_sig_as_C_string(),
4190                        NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
4191                        );
4192             tty->cr();
4193             DEBUG_ONLY(vm_exit(1));
4194           }
4195           // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
4196           // but there is no intrinsic available for it.
4197           if (method->intrinsic_candidate() &&
4198               method->intrinsic_id() == vmIntrinsics::_none) {
4199             tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
4200                        "but no compiler intrinsic is defined for the method.%s",
4201                        method->name_and_sig_as_C_string(),
4202                        NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4203                        );
4204             tty->cr();
4205             DEBUG_ONLY(vm_exit(1));
4206           }
4207         }
4208       }
4209 
4210 #ifdef ASSERT
4211       if (CheckIntrinsics) {
4212         // Check for orphan methods in the current class. A method m
4213         // of a class C is orphan if an intrinsic is defined for method m,
4214         // but class C does not declare m.
4215         // The check is potentially expensive, therefore it is available
4216         // only in debug builds.
4217 
4218         for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; id++) {
4219           if (id == vmIntrinsics::_compiledLambdaForm) {
4220             // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
4221             // generated for the JVM from a LambdaForm and therefore no method
4222             // is defined for it.
4223             continue;
4224           }
4225 
4226           if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
4227             // Check if the current class contains a method with the same
4228             // name, flags, signature.
4229             bool match = false;
4230             for (int j = 0; j < methods->length(); j++) {
4231               Method* method = methods->at(j);
4232               if (id == method->intrinsic_id()) {
4233                 match = true;
4234                 break;
4235               }
4236             }
4237 
4238             if (!match) {
4239               char buf[1000];
4240               tty->print("Compiler intrinsic is defined for method [%s], "
4241                          "but the method is not available in class [%s].%s",
4242                          vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id), buf, sizeof(buf)),
4243                          this_klass->name()->as_C_string(),
4244                          NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
4245                          );
4246               tty->cr();
4247               DEBUG_ONLY(vm_exit(1));
4248             }
4249           }
4250         }
4251       }
4252 #endif // ASSERT
4253     }
4254 
4255 
4256     if (cached_class_file != NULL) {
4257       // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
4258       this_klass->set_cached_class_file(cached_class_file);
4259     }
4260 
4261     // Fill in field values obtained by parse_classfile_attributes
4262     if (parsed_annotations.has_any_annotations())
4263       parsed_annotations.apply_to(this_klass);
4264     apply_parsed_class_attributes(this_klass);
4265 
4266     // Miranda methods
4267     if ((num_miranda_methods > 0) ||
4268         // if this class introduced new miranda methods or
4269         (super_klass.not_null() && (super_klass->has_miranda_methods()))
4270         // super class exists and this class inherited miranda methods
4271         ) {
4272       this_klass->set_has_miranda_methods(); // then set a flag
4273     }
4274 
4275     // Fill in information needed to compute superclasses.
4276     this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
4277 
4278     // Initialize itable offset tables
4279     klassItable::setup_itable_offset_table(this_klass);
4280 
4281     // Compute transitive closure of interfaces this class implements
4282     // Do final class setup
4283     fill_oop_maps(this_klass, info.nonstatic_oop_map_count, info.nonstatic_oop_offsets, info.nonstatic_oop_counts);
4284 
4285     // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
4286     set_precomputed_flags(this_klass);
4287 
4288     // reinitialize modifiers, using the InnerClasses attribute
4289     int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
4290     this_klass->set_modifier_flags(computed_modifiers);
4291 
4292     // check if this class can access its super class
4293     check_super_class_access(this_klass, CHECK_(nullHandle));
4294 
4295     // check if this class can access its superinterfaces
4296     check_super_interface_access(this_klass, CHECK_(nullHandle));
4297 
4298     // check if this class overrides any final method
4299     check_final_method_override(this_klass, CHECK_(nullHandle));
4300 
4301     // check that if this class is an interface then it doesn't have static methods
4302     if (this_klass->is_interface()) {
4303       /* An interface in a JAVA 8 classfile can be static */
4304       if (_major_version < JAVA_8_VERSION) {
4305         check_illegal_static_method(this_klass, CHECK_(nullHandle));
4306       }
4307     }
4308 
4309     // Allocate mirror and initialize static fields
4310     java_lang_Class::create_mirror(this_klass, class_loader, protection_domain,
4311                                    CHECK_(nullHandle));
4312 
4313     // Generate any default methods - default methods are interface methods
4314     // that have a default implementation.  This is new with Lambda project.
4315     if (has_default_methods ) {
4316       DefaultMethods::generate_default_methods(
4317           this_klass(), &all_mirandas, CHECK_(nullHandle));
4318     }
4319 
4320     // Update the loader_data graph.
4321     record_defined_class_dependencies(this_klass, CHECK_NULL);
4322 
4323     ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
4324                                              false /* not shared class */);
4325 
4326     if (TraceClassLoading) {
4327       ResourceMark rm;
4328       // print in a single call to reduce interleaving of output
4329       if (cfs->source() != NULL) {
4330         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4331                    cfs->source());
4332       } else if (class_loader.is_null()) {
4333         Klass* caller =
4334             THREAD->is_Java_thread()
4335                 ? ((JavaThread*)THREAD)->security_get_caller_class(1)
4336                 : NULL;
4337         // caller can be NULL, for example, during a JVMTI VM_Init hook
4338         if (caller != NULL) {
4339           tty->print("[Loaded %s by instance of %s]\n",
4340                      this_klass->external_name(),
4341                      caller->external_name());
4342         } else {
4343           tty->print("[Loaded %s]\n", this_klass->external_name());
4344         }
4345       } else {
4346         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4347                    class_loader->klass()->external_name());
4348       }
4349     }
4350 
4351     if (TraceClassResolution) {
4352       ResourceMark rm;
4353       // print out the superclass.
4354       const char * from = this_klass()->external_name();
4355       if (this_klass->java_super() != NULL) {
4356         tty->print("RESOLVE %s %s (super)\n", from, this_klass->java_super()->external_name());
4357       }
4358       // print out each of the interface classes referred to by this class.
4359       Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4360       if (local_interfaces != NULL) {
4361         int length = local_interfaces->length();
4362         for (int i = 0; i < length; i++) {
4363           Klass* k = local_interfaces->at(i);
4364           const char * to = k->external_name();
4365           tty->print("RESOLVE %s %s (interface)\n", from, to);
4366         }
4367       }
4368     }
4369 
4370     // preserve result across HandleMark
4371     preserve_this_klass = this_klass();
4372   }
4373 
4374   // Create new handle outside HandleMark (might be needed for
4375   // Extended Class Redefinition)
4376   instanceKlassHandle this_klass (THREAD, preserve_this_klass);
4377   debug_only(this_klass->verify();)
4378 
4379   // Clear class if no error has occurred so destructor doesn't deallocate it
4380   _klass = NULL;
4381   return this_klass;
4382 }
4383 
4384 // Destructor to clean up if there's an error
4385 ClassFileParser::~ClassFileParser() {
4386   MetadataFactory::free_metadata(_loader_data, _cp);
4387   MetadataFactory::free_array<u2>(_loader_data, _fields);
4388 
4389   // Free methods
4390   InstanceKlass::deallocate_methods(_loader_data, _methods);
4391 
4392   // beware of the Universe::empty_blah_array!!
4393   if (_inner_classes != Universe::the_empty_short_array()) {
4394     MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
4395   }
4396 
4397   // Free interfaces
4398   InstanceKlass::deallocate_interfaces(_loader_data, _super_klass(),
4399                                        _local_interfaces, _transitive_interfaces);
4400 
4401   if (_combined_annotations != NULL) {
4402     // After all annotations arrays have been created, they are installed into the
4403     // Annotations object that will be assigned to the InstanceKlass being created.
4404 
4405     // Deallocate the Annotations object and the installed annotations arrays.
4406     _combined_annotations->deallocate_contents(_loader_data);
4407 
4408     // If the _combined_annotations pointer is non-NULL,
4409     // then the other annotations fields should have been cleared.
4410     assert(_annotations             == NULL, "Should have been cleared");
4411     assert(_type_annotations        == NULL, "Should have been cleared");
4412     assert(_fields_annotations      == NULL, "Should have been cleared");
4413     assert(_fields_type_annotations == NULL, "Should have been cleared");
4414   } else {
4415     // If the annotations arrays were not installed into the Annotations object,
4416     // then they have to be deallocated explicitly.
4417     MetadataFactory::free_array<u1>(_loader_data, _annotations);
4418     MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
4419     Annotations::free_contents(_loader_data, _fields_annotations);
4420     Annotations::free_contents(_loader_data, _fields_type_annotations);
4421   }
4422 
4423   clear_class_metadata();
4424 
4425   // deallocate the klass if already created.  Don't directly deallocate, but add
4426   // to the deallocate list so that the klass is removed from the CLD::_klasses list
4427   // at a safepoint.
4428   if (_klass != NULL) {
4429     _loader_data->add_to_deallocate_list(_klass);
4430   }
4431   _klass = NULL;
4432 }
4433 
4434 void ClassFileParser::print_field_layout(Symbol* name,
4435                                          Array<u2>* fields,
4436                                          const constantPoolHandle& cp,
4437                                          int instance_size,
4438                                          int instance_fields_start,
4439                                          int instance_fields_end,
4440                                          int static_fields_end) {
4441   tty->print("%s: field layout\n", name->as_klass_external_name());
4442   tty->print("  @%3d %s\n", instance_fields_start, "--- instance fields start ---");
4443   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4444     if (!fs.access_flags().is_static()) {
4445       tty->print("  @%3d \"%s\" %s\n",
4446           fs.offset(),
4447           fs.name()->as_klass_external_name(),
4448           fs.signature()->as_klass_external_name());
4449     }
4450   }
4451   tty->print("  @%3d %s\n", instance_fields_end, "--- instance fields end ---");
4452   tty->print("  @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
4453   tty->print("  @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
4454   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4455     if (fs.access_flags().is_static()) {
4456       tty->print("  @%3d \"%s\" %s\n",
4457           fs.offset(),
4458           fs.name()->as_klass_external_name(),
4459           fs.signature()->as_klass_external_name());
4460     }
4461   }
4462   tty->print("  @%3d %s\n", static_fields_end, "--- static fields end ---");
4463   tty->print("\n");
4464 }
4465 
4466 unsigned int
4467 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
4468                                        unsigned int nonstatic_oop_map_count,
4469                                        int first_nonstatic_oop_offset) {
4470   unsigned int map_count =
4471     super.is_null() ? 0 : super->nonstatic_oop_map_count();
4472   if (nonstatic_oop_map_count > 0) {
4473     // We have oops to add to map
4474     if (map_count == 0) {
4475       map_count = nonstatic_oop_map_count;
4476     } else {
4477       // Check whether we should add a new map block or whether the last one can
4478       // be extended
4479       OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
4480       OopMapBlock* const last_map = first_map + map_count - 1;
4481 
4482       int next_offset = last_map->offset() + last_map->count() * heapOopSize;
4483       if (next_offset == first_nonstatic_oop_offset) {
4484         // There is no gap bettwen superklass's last oop field and first
4485         // local oop field, merge maps.
4486         nonstatic_oop_map_count -= 1;
4487       } else {
4488         // Superklass didn't end with a oop field, add extra maps
4489         assert(next_offset < first_nonstatic_oop_offset, "just checking");
4490       }
4491       map_count += nonstatic_oop_map_count;
4492     }
4493   }
4494   return map_count;
4495 }
4496 
4497 
4498 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
4499                                     unsigned int nonstatic_oop_map_count,
4500                                     int* nonstatic_oop_offsets,
4501                                     unsigned int* nonstatic_oop_counts) {
4502   OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4503   const InstanceKlass* const super = k->superklass();
4504   const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4505   if (super_count > 0) {
4506     // Copy maps from superklass
4507     OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4508     for (unsigned int i = 0; i < super_count; ++i) {
4509       *this_oop_map++ = *super_oop_map++;
4510     }
4511   }
4512 
4513   if (nonstatic_oop_map_count > 0) {
4514     if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4515       // The counts differ because there is no gap between superklass's last oop
4516       // field and the first local oop field.  Extend the last oop map copied
4517       // from the superklass instead of creating new one.
4518       nonstatic_oop_map_count--;
4519       nonstatic_oop_offsets++;
4520       this_oop_map--;
4521       this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4522       this_oop_map++;
4523     }
4524 
4525     // Add new map blocks, fill them
4526     while (nonstatic_oop_map_count-- > 0) {
4527       this_oop_map->set_offset(*nonstatic_oop_offsets++);
4528       this_oop_map->set_count(*nonstatic_oop_counts++);
4529       this_oop_map++;
4530     }
4531     assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4532            this_oop_map, "sanity");
4533   }
4534 }
4535 
4536 
4537 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
4538   Klass* super = k->super();
4539 
4540   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4541   // in which case we don't have to register objects as finalizable
4542   if (!_has_empty_finalizer) {
4543     if (_has_finalizer ||
4544         (super != NULL && super->has_finalizer())) {
4545       k->set_has_finalizer();
4546     }
4547   }
4548 
4549 #ifdef ASSERT
4550   bool f = false;
4551   Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
4552                                  vmSymbols::void_method_signature());
4553   if (m != NULL && !m->is_empty_method()) {
4554       f = true;
4555   }
4556 
4557   // Spec doesn't prevent agent from redefinition of empty finalizer.
4558   // Despite the fact that it's generally bad idea and redefined finalizer
4559   // will not work as expected we shouldn't abort vm in this case
4560   if (!k->has_redefined_this_or_super()) {
4561     assert(f == k->has_finalizer(), "inconsistent has_finalizer");
4562   }
4563 #endif
4564 
4565   // Check if this klass supports the java.lang.Cloneable interface
4566   if (SystemDictionary::Cloneable_klass_loaded()) {
4567     if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4568       k->set_is_cloneable();
4569     }
4570   }
4571 
4572   // Check if this klass has a vanilla default constructor
4573   if (super == NULL) {
4574     // java.lang.Object has empty default constructor
4575     k->set_has_vanilla_constructor();
4576   } else {
4577     if (super->has_vanilla_constructor() &&
4578         _has_vanilla_constructor) {
4579       k->set_has_vanilla_constructor();
4580     }
4581 #ifdef ASSERT
4582     bool v = false;
4583     if (super->has_vanilla_constructor()) {
4584       Method* constructor = k->find_method(vmSymbols::object_initializer_name(
4585 ), vmSymbols::void_method_signature());
4586       if (constructor != NULL && constructor->is_vanilla_constructor()) {
4587         v = true;
4588       }
4589     }
4590     assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4591 #endif
4592   }
4593 
4594   // If it cannot be fast-path allocated, set a bit in the layout helper.
4595   // See documentation of InstanceKlass::can_be_fastpath_allocated().
4596   assert(k->size_helper() > 0, "layout_helper is initialized");
4597   if ((!RegisterFinalizersAtInit && k->has_finalizer())
4598       || k->is_abstract() || k->is_interface()
4599       || (k->name() == vmSymbols::java_lang_Class() && k->class_loader() == NULL)
4600       || k->size_helper() >= FastAllocateSizeLimit) {
4601     // Forbid fast-path allocation.
4602     jint lh = Klass::instance_layout_helper(k->size_helper(), true);
4603     k->set_layout_helper(lh);
4604   }
4605 }
4606 
4607 // Attach super classes and interface classes to class loader data
4608 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
4609   ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
4610   if (defining_loader_data->is_the_null_class_loader_data()) {
4611       // Dependencies to null class loader data are implicit.
4612       return;
4613   } else {
4614     // add super class dependency
4615     Klass* super = defined_klass->super();
4616     if (super != NULL) {
4617       defining_loader_data->record_dependency(super, CHECK);
4618     }
4619 
4620     // add super interface dependencies
4621     Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
4622     if (local_interfaces != NULL) {
4623       int length = local_interfaces->length();
4624       for (int i = 0; i < length; i++) {
4625         defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4626       }
4627     }
4628   }
4629 }
4630 
4631 // utility methods for appending an array with check for duplicates
4632 
4633 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
4634   // iterate over new interfaces
4635   for (int i = 0; i < ifs->length(); i++) {
4636     Klass* e = ifs->at(i);
4637     assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4638     // add new interface
4639     result->append_if_missing(e);
4640   }
4641 }
4642 
4643 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(
4644                                         instanceKlassHandle super,
4645                                         Array<Klass*>* local_ifs, TRAPS) {
4646   // Compute maximum size for transitive interfaces
4647   int max_transitive_size = 0;
4648   int super_size = 0;
4649   // Add superclass transitive interfaces size
4650   if (super.not_null()) {
4651     super_size = super->transitive_interfaces()->length();
4652     max_transitive_size += super_size;
4653   }
4654   // Add local interfaces' super interfaces
4655   int local_size = local_ifs->length();
4656   for (int i = 0; i < local_size; i++) {
4657     Klass* l = local_ifs->at(i);
4658     max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4659   }
4660   // Finally add local interfaces
4661   max_transitive_size += local_size;
4662   // Construct array
4663   if (max_transitive_size == 0) {
4664     // no interfaces, use canonicalized array
4665     return Universe::the_empty_klass_array();
4666   } else if (max_transitive_size == super_size) {
4667     // no new local interfaces added, share superklass' transitive interface array
4668     return super->transitive_interfaces();
4669   } else if (max_transitive_size == local_size) {
4670     // only local interfaces added, share local interface array
4671     return local_ifs;
4672   } else {
4673     ResourceMark rm;
4674     GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
4675 
4676     // Copy down from superclass
4677     if (super.not_null()) {
4678       append_interfaces(result, super->transitive_interfaces());
4679     }
4680 
4681     // Copy down from local interfaces' superinterfaces
4682     for (int i = 0; i < local_ifs->length(); i++) {
4683       Klass* l = local_ifs->at(i);
4684       append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4685     }
4686     // Finally add local interfaces
4687     append_interfaces(result, local_ifs);
4688 
4689     // length will be less than the max_transitive_size if duplicates were removed
4690     int length = result->length();
4691     assert(length <= max_transitive_size, "just checking");
4692     Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(_loader_data, length, CHECK_NULL);
4693     for (int i = 0; i < length; i++) {
4694       Klass* e = result->at(i);
4695         assert(e != NULL, "just checking");
4696       new_result->at_put(i, e);
4697     }
4698     return new_result;
4699   }
4700 }
4701 
4702 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
4703   Klass* super = this_klass->super();
4704   if ((super != NULL) &&
4705       (!Reflection::verify_class_access(this_klass(), super, false))) {
4706     ResourceMark rm(THREAD);
4707     Exceptions::fthrow(
4708       THREAD_AND_LOCATION,
4709       vmSymbols::java_lang_IllegalAccessError(),
4710       "class %s cannot access its superclass %s",
4711       this_klass->external_name(),
4712       super->external_name()
4713     );
4714     return;
4715   }
4716 }
4717 
4718 
4719 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4720   Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4721   int lng = local_interfaces->length();
4722   for (int i = lng - 1; i >= 0; i--) {
4723     Klass* k = local_interfaces->at(i);
4724     assert (k != NULL && k->is_interface(), "invalid interface");
4725     if (!Reflection::verify_class_access(this_klass(), k, false)) {
4726       ResourceMark rm(THREAD);
4727       Exceptions::fthrow(
4728         THREAD_AND_LOCATION,
4729         vmSymbols::java_lang_IllegalAccessError(),
4730         "class %s cannot access its superinterface %s",
4731         this_klass->external_name(),
4732         k->external_name()
4733       );
4734       return;
4735     }
4736   }
4737 }
4738 
4739 
4740 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4741   Array<Method*>* methods = this_klass->methods();
4742   int num_methods = methods->length();
4743 
4744   // go thru each method and check if it overrides a final method
4745   for (int index = 0; index < num_methods; index++) {
4746     Method* m = methods->at(index);
4747 
4748     // skip private, static, and <init> methods
4749     if ((!m->is_private() && !m->is_static()) &&
4750         (m->name() != vmSymbols::object_initializer_name())) {
4751 
4752       Symbol* name = m->name();
4753       Symbol* signature = m->signature();
4754       Klass* k = this_klass->super();
4755       Method* super_m = NULL;
4756       while (k != NULL) {
4757         // skip supers that don't have final methods.
4758         if (k->has_final_method()) {
4759           // lookup a matching method in the super class hierarchy
4760           super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4761           if (super_m == NULL) {
4762             break; // didn't find any match; get out
4763           }
4764 
4765           if (super_m->is_final() && !super_m->is_static() &&
4766               // matching method in super is final, and not static
4767               (Reflection::verify_field_access(this_klass(),
4768                                                super_m->method_holder(),
4769                                                super_m->method_holder(),
4770                                                super_m->access_flags(), false))
4771             // this class can access super final method and therefore override
4772             ) {
4773             ResourceMark rm(THREAD);
4774             Exceptions::fthrow(
4775               THREAD_AND_LOCATION,
4776               vmSymbols::java_lang_VerifyError(),
4777               "class %s overrides final method %s.%s%s",
4778               this_klass->external_name(),
4779               super_m->method_holder()->external_name(),
4780               name->as_C_string(),
4781               signature->as_C_string()
4782             );
4783             return;
4784           }
4785 
4786           // continue to look from super_m's holder's super.
4787           k = super_m->method_holder()->super();
4788           continue;
4789         }
4790 
4791         k = k->super();
4792       }
4793     }
4794   }
4795 }
4796 
4797 
4798 // assumes that this_klass is an interface
4799 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4800   assert(this_klass->is_interface(), "not an interface");
4801   Array<Method*>* methods = this_klass->methods();
4802   int num_methods = methods->length();
4803 
4804   for (int index = 0; index < num_methods; index++) {
4805     Method* m = methods->at(index);
4806     // if m is static and not the init method, throw a verify error
4807     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4808       ResourceMark rm(THREAD);
4809       Exceptions::fthrow(
4810         THREAD_AND_LOCATION,
4811         vmSymbols::java_lang_VerifyError(),
4812         "Illegal static method %s in interface %s",
4813         m->name()->as_C_string(),
4814         this_klass->external_name()
4815       );
4816       return;
4817     }
4818   }
4819 }
4820 
4821 // utility methods for format checking
4822 
4823 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4824   if (!_need_verify) { return; }
4825 
4826   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
4827   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
4828   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
4829   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
4830   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
4831   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4832   const bool major_gte_15  = _major_version >= JAVA_1_5_VERSION;
4833 
4834   if ((is_abstract && is_final) ||
4835       (is_interface && !is_abstract) ||
4836       (is_interface && major_gte_15 && (is_super || is_enum)) ||
4837       (!is_interface && major_gte_15 && is_annotation)) {
4838     ResourceMark rm(THREAD);
4839     Exceptions::fthrow(
4840       THREAD_AND_LOCATION,
4841       vmSymbols::java_lang_ClassFormatError(),
4842       "Illegal class modifiers in class %s: 0x%X",
4843       _class_name->as_C_string(), flags
4844     );
4845     return;
4846   }
4847 }
4848 
4849 bool ClassFileParser::has_illegal_visibility(jint flags) {
4850   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4851   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4852   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4853 
4854   return ((is_public && is_protected) ||
4855           (is_public && is_private) ||
4856           (is_protected && is_private));
4857 }
4858 
4859 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4860   u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4861   return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4862          (major <= max_version) &&
4863          ((major != max_version) ||
4864           (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4865 }
4866 
4867 void ClassFileParser::verify_legal_field_modifiers(
4868     jint flags, bool is_interface, TRAPS) {
4869   if (!_need_verify) { return; }
4870 
4871   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4872   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4873   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4874   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
4875   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
4876   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
4877   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4878   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
4879   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4880 
4881   bool is_illegal = false;
4882 
4883   if (is_interface) {
4884     if (!is_public || !is_static || !is_final || is_private ||
4885         is_protected || is_volatile || is_transient ||
4886         (major_gte_15 && is_enum)) {
4887       is_illegal = true;
4888     }
4889   } else { // not interface
4890     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4891       is_illegal = true;
4892     }
4893   }
4894 
4895   if (is_illegal) {
4896     ResourceMark rm(THREAD);
4897     Exceptions::fthrow(
4898       THREAD_AND_LOCATION,
4899       vmSymbols::java_lang_ClassFormatError(),
4900       "Illegal field modifiers in class %s: 0x%X",
4901       _class_name->as_C_string(), flags);
4902     return;
4903   }
4904 }
4905 
4906 void ClassFileParser::verify_legal_method_modifiers(
4907     jint flags, bool is_interface, Symbol* name, TRAPS) {
4908   if (!_need_verify) { return; }
4909 
4910   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
4911   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
4912   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
4913   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
4914   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
4915   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
4916   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
4917   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
4918   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4919   const bool is_protected    = (flags & JVM_ACC_PROTECTED)    != 0;
4920   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
4921   const bool major_gte_8     = _major_version >= JAVA_8_VERSION;
4922   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
4923 
4924   bool is_illegal = false;
4925 
4926   if (is_interface) {
4927     if (major_gte_8) {
4928       // Class file version is JAVA_8_VERSION or later Methods of
4929       // interfaces may set any of the flags except ACC_PROTECTED,
4930       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4931       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4932       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4933           (is_native || is_protected || is_final || is_synchronized) ||
4934           // If a specific method of a class or interface has its
4935           // ACC_ABSTRACT flag set, it must not have any of its
4936           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4937           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
4938           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4939           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4940           (is_abstract && (is_private || is_static || is_strict))) {
4941         is_illegal = true;
4942       }
4943     } else if (major_gte_15) {
4944       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4945       if (!is_public || is_static || is_final || is_synchronized ||
4946           is_native || !is_abstract || is_strict) {
4947         is_illegal = true;
4948       }
4949     } else {
4950       // Class file version is pre-JAVA_1_5_VERSION
4951       if (!is_public || is_static || is_final || is_native || !is_abstract) {
4952         is_illegal = true;
4953       }
4954     }
4955   } else { // not interface
4956     if (has_illegal_visibility(flags)) {
4957       is_illegal = true;
4958     } else {
4959       if (is_initializer) {
4960         if (is_static || is_final || is_synchronized || is_native ||
4961             is_abstract || (major_gte_15 && is_bridge)) {
4962           is_illegal = true;
4963         }
4964       } else { // not initializer
4965         if (is_abstract) {
4966           if ((is_final || is_native || is_private || is_static ||
4967               (major_gte_15 && (is_synchronized || is_strict)))) {
4968             is_illegal = true;
4969           }
4970         }
4971       }
4972     }
4973   }
4974 
4975   if (is_illegal) {
4976     ResourceMark rm(THREAD);
4977     Exceptions::fthrow(
4978       THREAD_AND_LOCATION,
4979       vmSymbols::java_lang_ClassFormatError(),
4980       "Method %s in class %s has illegal modifiers: 0x%X",
4981       name->as_C_string(), _class_name->as_C_string(), flags);
4982     return;
4983   }
4984 }
4985 
4986 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4987   assert(_need_verify, "only called when _need_verify is true");
4988   int i = 0;
4989   int count = length >> 2;
4990   for (int k=0; k<count; k++) {
4991     unsigned char b0 = buffer[i];
4992     unsigned char b1 = buffer[i+1];
4993     unsigned char b2 = buffer[i+2];
4994     unsigned char b3 = buffer[i+3];
4995     // For an unsigned char v,
4996     // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4997     // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4998     unsigned char res = b0 | b0 - 1 |
4999                         b1 | b1 - 1 |
5000                         b2 | b2 - 1 |
5001                         b3 | b3 - 1;
5002     if (res >= 128) break;
5003     i += 4;
5004   }
5005   for(; i < length; i++) {
5006     unsigned short c;
5007     // no embedded zeros
5008     guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
5009     if(buffer[i] < 128) {
5010       continue;
5011     }
5012     if ((i + 5) < length) { // see if it's legal supplementary character
5013       if (UTF8::is_supplementary_character(&buffer[i])) {
5014         c = UTF8::get_supplementary_character(&buffer[i]);
5015         i += 5;
5016         continue;
5017       }
5018     }
5019     switch (buffer[i] >> 4) {
5020       default: break;
5021       case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
5022         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5023       case 0xC: case 0xD:  // 110xxxxx  10xxxxxx
5024         c = (buffer[i] & 0x1F) << 6;
5025         i++;
5026         if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
5027           c += buffer[i] & 0x3F;
5028           if (_major_version <= 47 || c == 0 || c >= 0x80) {
5029             // for classes with major > 47, c must a null or a character in its shortest form
5030             break;
5031           }
5032         }
5033         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5034       case 0xE:  // 1110xxxx 10xxxxxx 10xxxxxx
5035         c = (buffer[i] & 0xF) << 12;
5036         i += 2;
5037         if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
5038           c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
5039           if (_major_version <= 47 || c >= 0x800) {
5040             // for classes with major > 47, c must be in its shortest form
5041             break;
5042           }
5043         }
5044         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
5045     }  // end of switch
5046   } // end of for
5047 }
5048 
5049 // Checks if name is a legal class name.
5050 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
5051   if (!_need_verify || _relax_verify) { return; }
5052 
5053   char buf[fixed_buffer_size];
5054   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5055   unsigned int length = name->utf8_length();
5056   bool legal = false;
5057 
5058   if (length > 0) {
5059     char* p;
5060     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
5061       p = skip_over_field_signature(bytes, false, length, CHECK);
5062       legal = (p != NULL) && ((p - bytes) == (int)length);
5063     } else if (_major_version < JAVA_1_5_VERSION) {
5064       if (bytes[0] != '<') {
5065         p = skip_over_field_name(bytes, true, length);
5066         legal = (p != NULL) && ((p - bytes) == (int)length);
5067       }
5068     } else {
5069       // 4900761: relax the constraints based on JSR202 spec
5070       // Class names may be drawn from the entire Unicode character set.
5071       // Identifiers between '/' must be unqualified names.
5072       // The utf8 string has been verified when parsing cpool entries.
5073       legal = verify_unqualified_name(bytes, length, LegalClass);
5074     }
5075   }
5076   if (!legal) {
5077     ResourceMark rm(THREAD);
5078     Exceptions::fthrow(
5079       THREAD_AND_LOCATION,
5080       vmSymbols::java_lang_ClassFormatError(),
5081       "Illegal class name \"%s\" in class file %s", bytes,
5082       _class_name->as_C_string()
5083     );
5084     return;
5085   }
5086 }
5087 
5088 // Checks if name is a legal field name.
5089 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
5090   if (!_need_verify || _relax_verify) { return; }
5091 
5092   char buf[fixed_buffer_size];
5093   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5094   unsigned int length = name->utf8_length();
5095   bool legal = false;
5096 
5097   if (length > 0) {
5098     if (_major_version < JAVA_1_5_VERSION) {
5099       if (bytes[0] != '<') {
5100         char* p = skip_over_field_name(bytes, false, length);
5101         legal = (p != NULL) && ((p - bytes) == (int)length);
5102       }
5103     } else {
5104       // 4881221: relax the constraints based on JSR202 spec
5105       legal = verify_unqualified_name(bytes, length, LegalField);
5106     }
5107   }
5108 
5109   if (!legal) {
5110     ResourceMark rm(THREAD);
5111     Exceptions::fthrow(
5112       THREAD_AND_LOCATION,
5113       vmSymbols::java_lang_ClassFormatError(),
5114       "Illegal field name \"%s\" in class %s", bytes,
5115       _class_name->as_C_string()
5116     );
5117     return;
5118   }
5119 }
5120 
5121 // Checks if name is a legal method name.
5122 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
5123   if (!_need_verify || _relax_verify) { return; }
5124 
5125   assert(name != NULL, "method name is null");
5126   char buf[fixed_buffer_size];
5127   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5128   unsigned int length = name->utf8_length();
5129   bool legal = false;
5130 
5131   if (length > 0) {
5132     if (bytes[0] == '<') {
5133       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5134         legal = true;
5135       }
5136     } else if (_major_version < JAVA_1_5_VERSION) {
5137       char* p;
5138       p = skip_over_field_name(bytes, false, length);
5139       legal = (p != NULL) && ((p - bytes) == (int)length);
5140     } else {
5141       // 4881221: relax the constraints based on JSR202 spec
5142       legal = verify_unqualified_name(bytes, length, LegalMethod);
5143     }
5144   }
5145 
5146   if (!legal) {
5147     ResourceMark rm(THREAD);
5148     Exceptions::fthrow(
5149       THREAD_AND_LOCATION,
5150       vmSymbols::java_lang_ClassFormatError(),
5151       "Illegal method name \"%s\" in class %s", bytes,
5152       _class_name->as_C_string()
5153     );
5154     return;
5155   }
5156 }
5157 
5158 
5159 // Checks if signature is a legal field signature.
5160 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
5161   if (!_need_verify) { return; }
5162 
5163   char buf[fixed_buffer_size];
5164   char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5165   unsigned int length = signature->utf8_length();
5166   char* p = skip_over_field_signature(bytes, false, length, CHECK);
5167 
5168   if (p == NULL || (p - bytes) != (int)length) {
5169     throwIllegalSignature("Field", name, signature, CHECK);
5170   }
5171 }
5172 
5173 // Checks if signature is a legal method signature.
5174 // Returns number of parameters
5175 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
5176   if (!_need_verify) {
5177     // make sure caller's args_size will be less than 0 even for non-static
5178     // method so it will be recomputed in compute_size_of_parameters().
5179     return -2;
5180   }
5181 
5182   // Class initializers cannot have args for class format version >= 51.
5183   if (name == vmSymbols::class_initializer_name() &&
5184       signature != vmSymbols::void_method_signature() &&
5185       _major_version >= JAVA_7_VERSION) {
5186     throwIllegalSignature("Method", name, signature, CHECK_0);
5187     return 0;
5188   }
5189 
5190   unsigned int args_size = 0;
5191   char buf[fixed_buffer_size];
5192   char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5193   unsigned int length = signature->utf8_length();
5194   char* nextp;
5195 
5196   // The first character must be a '('
5197   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5198     length--;
5199     // Skip over legal field signatures
5200     nextp = skip_over_field_signature(p, false, length, CHECK_0);
5201     while ((length > 0) && (nextp != NULL)) {
5202       args_size++;
5203       if (p[0] == 'J' || p[0] == 'D') {
5204         args_size++;
5205       }
5206       length -= nextp - p;
5207       p = nextp;
5208       nextp = skip_over_field_signature(p, false, length, CHECK_0);
5209     }
5210     // The first non-signature thing better be a ')'
5211     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5212       length--;
5213       if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5214         // All internal methods must return void
5215         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5216           return args_size;
5217         }
5218       } else {
5219         // Now we better just have a return value
5220         nextp = skip_over_field_signature(p, true, length, CHECK_0);
5221         if (nextp && ((int)length == (nextp - p))) {
5222           return args_size;
5223         }
5224       }
5225     }
5226   }
5227   // Report error
5228   throwIllegalSignature("Method", name, signature, CHECK_0);
5229   return 0;
5230 }
5231 
5232 
5233 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5234 // Method names also may not contain the characters '<' or '>', unless <init>
5235 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
5236 // method.  Because these names have been checked as special cases before
5237 // calling this method in verify_legal_method_name.
5238 bool ClassFileParser::verify_unqualified_name(
5239     char* name, unsigned int length, int type) {
5240   jchar ch;
5241 
5242   for (char* p = name; p != name + length; ) {
5243     ch = *p;
5244     if (ch < 128) {
5245       p++;
5246       if (ch == '.' || ch == ';' || ch == '[' ) {
5247         return false;   // do not permit '.', ';', or '['
5248       }
5249       if (type != LegalClass && ch == '/') {
5250         return false;   // do not permit '/' unless it's class name
5251       }
5252       if (type == LegalMethod && (ch == '<' || ch == '>')) {
5253         return false;   // do not permit '<' or '>' in method names
5254       }
5255     } else {
5256       char* tmp_p = UTF8::next(p, &ch);
5257       p = tmp_p;
5258     }
5259   }
5260   return true;
5261 }
5262 
5263 
5264 // Take pointer to a string. Skip over the longest part of the string that could
5265 // be taken as a fieldname. Allow '/' if slash_ok is true.
5266 // Return a pointer to just past the fieldname.
5267 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5268 // being true, we saw consecutive slashes (meaning we were looking for a
5269 // qualified path but found something that was badly-formed).
5270 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
5271   char* p;
5272   jchar ch;
5273   jboolean last_is_slash = false;
5274   jboolean not_first_ch = false;
5275 
5276   for (p = name; p != name + length; not_first_ch = true) {
5277     char* old_p = p;
5278     ch = *p;
5279     if (ch < 128) {
5280       p++;
5281       // quick check for ascii
5282       if ((ch >= 'a' && ch <= 'z') ||
5283           (ch >= 'A' && ch <= 'Z') ||
5284           (ch == '_' || ch == '$') ||
5285           (not_first_ch && ch >= '0' && ch <= '9')) {
5286         last_is_slash = false;
5287         continue;
5288       }
5289       if (slash_ok && ch == '/') {
5290         if (last_is_slash) {
5291           return NULL;  // Don't permit consecutive slashes
5292         }
5293         last_is_slash = true;
5294         continue;
5295       }
5296     } else {
5297       jint unicode_ch;
5298       char* tmp_p = UTF8::next_character(p, &unicode_ch);
5299       p = tmp_p;
5300       last_is_slash = false;
5301       // Check if ch is Java identifier start or is Java identifier part
5302       // 4672820: call java.lang.Character methods directly without generating separate tables.
5303       EXCEPTION_MARK;
5304       instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
5305 
5306       // return value
5307       JavaValue result(T_BOOLEAN);
5308       // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5309       JavaCallArguments args;
5310       args.push_int(unicode_ch);
5311 
5312       // public static boolean isJavaIdentifierStart(char ch);
5313       JavaCalls::call_static(&result,
5314                              klass,
5315                              vmSymbols::isJavaIdentifierStart_name(),
5316                              vmSymbols::int_bool_signature(),
5317                              &args,
5318                              THREAD);
5319 
5320       if (HAS_PENDING_EXCEPTION) {
5321         CLEAR_PENDING_EXCEPTION;
5322         return 0;
5323       }
5324       if (result.get_jboolean()) {
5325         continue;
5326       }
5327 
5328       if (not_first_ch) {
5329         // public static boolean isJavaIdentifierPart(char ch);
5330         JavaCalls::call_static(&result,
5331                                klass,
5332                                vmSymbols::isJavaIdentifierPart_name(),
5333                                vmSymbols::int_bool_signature(),
5334                                &args,
5335                                THREAD);
5336 
5337         if (HAS_PENDING_EXCEPTION) {
5338           CLEAR_PENDING_EXCEPTION;
5339           return 0;
5340         }
5341 
5342         if (result.get_jboolean()) {
5343           continue;
5344         }
5345       }
5346     }
5347     return (not_first_ch) ? old_p : NULL;
5348   }
5349   return (not_first_ch) ? p : NULL;
5350 }
5351 
5352 
5353 // Take pointer to a string. Skip over the longest part of the string that could
5354 // be taken as a field signature. Allow "void" if void_ok.
5355 // Return a pointer to just past the signature.
5356 // Return NULL if no legal signature is found.
5357 char* ClassFileParser::skip_over_field_signature(char* signature,
5358                                                  bool void_ok,
5359                                                  unsigned int length,
5360                                                  TRAPS) {
5361   unsigned int array_dim = 0;
5362   while (length > 0) {
5363     switch (signature[0]) {
5364       case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5365       case JVM_SIGNATURE_BOOLEAN:
5366       case JVM_SIGNATURE_BYTE:
5367       case JVM_SIGNATURE_CHAR:
5368       case JVM_SIGNATURE_SHORT:
5369       case JVM_SIGNATURE_INT:
5370       case JVM_SIGNATURE_FLOAT:
5371       case JVM_SIGNATURE_LONG:
5372       case JVM_SIGNATURE_DOUBLE:
5373         return signature + 1;
5374       case JVM_SIGNATURE_CLASS: {
5375         if (_major_version < JAVA_1_5_VERSION) {
5376           // Skip over the class name if one is there
5377           char* p = skip_over_field_name(signature + 1, true, --length);
5378 
5379           // The next character better be a semicolon
5380           if (p && (p - signature) > 1 && p[0] == ';') {
5381             return p + 1;
5382           }
5383         } else {
5384           // 4900761: For class version > 48, any unicode is allowed in class name.
5385           length--;
5386           signature++;
5387           while (length > 0 && signature[0] != ';') {
5388             if (signature[0] == '.') {
5389               classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
5390             }
5391             length--;
5392             signature++;
5393           }
5394           if (signature[0] == ';') { return signature + 1; }
5395         }
5396 
5397         return NULL;
5398       }
5399       case JVM_SIGNATURE_ARRAY:
5400         array_dim++;
5401         if (array_dim > 255) {
5402           // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5403           classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5404         }
5405         // The rest of what's there better be a legal signature
5406         signature++;
5407         length--;
5408         void_ok = false;
5409         break;
5410 
5411       default:
5412         return NULL;
5413     }
5414   }
5415   return NULL;
5416 }
--- EOF ---