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