1 /*
   2  * Copyright (c) 1997, 2013, 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/genericSignatures.hpp"
  32 #include "classfile/javaClasses.hpp"
  33 #include "classfile/symbolTable.hpp"
  34 #include "classfile/systemDictionary.hpp"
  35 #include "classfile/verificationType.hpp"
  36 #include "classfile/verifier.hpp"
  37 #include "classfile/vmSymbols.hpp"
  38 #include "memory/allocation.hpp"
  39 #include "memory/gcLocker.hpp"
  40 #include "memory/metadataFactory.hpp"
  41 #include "memory/oopFactory.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 
  64 // We generally try to create the oops directly when parsing, rather than
  65 // allocating temporary data structures and copying the bytes twice. A
  66 // temporary area is only needed when parsing utf8 entries in the constant
  67 // pool and when parsing line number tables.
  68 
  69 // We add assert in debug mode when class format is not checked.
  70 
  71 #define JAVA_CLASSFILE_MAGIC              0xCAFEBABE
  72 #define JAVA_MIN_SUPPORTED_VERSION        45
  73 #define JAVA_MAX_SUPPORTED_VERSION        52
  74 #define JAVA_MAX_SUPPORTED_MINOR_VERSION  0
  75 
  76 // Used for two backward compatibility reasons:
  77 // - to check for new additions to the class file format in JDK1.5
  78 // - to check for bug fixes in the format checker in JDK1.5
  79 #define JAVA_1_5_VERSION                  49
  80 
  81 // Used for backward compatibility reasons:
  82 // - to check for javac bug fixes that happened after 1.5
  83 // - also used as the max version when running in jdk6
  84 #define JAVA_6_VERSION                    50
  85 
  86 // Used for backward compatibility reasons:
  87 // - to check NameAndType_info signatures more aggressively
  88 #define JAVA_7_VERSION                    51
  89 
  90 // Extension method support.
  91 #define JAVA_8_VERSION                    52
  92 
  93 
  94 void ClassFileParser::parse_constant_pool_entries(ClassLoaderData* loader_data, constantPoolHandle cp, int length, TRAPS) {
  95   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
  96   // this function (_current can be allocated in a register, with scalar
  97   // replacement of aggregates). The _current pointer is copied back to
  98   // stream() when this function returns. DON'T call another method within
  99   // this method that uses stream().
 100   ClassFileStream* cfs0 = stream();
 101   ClassFileStream cfs1 = *cfs0;
 102   ClassFileStream* cfs = &cfs1;
 103 #ifdef ASSERT
 104   assert(cfs->allocated_on_stack(),"should be local");
 105   u1* old_current = cfs0->current();
 106 #endif
 107   Handle class_loader(THREAD, loader_data->class_loader());
 108 
 109   // Used for batching symbol allocations.
 110   const char* names[SymbolTable::symbol_alloc_batch_size];
 111   int lengths[SymbolTable::symbol_alloc_batch_size];
 112   int indices[SymbolTable::symbol_alloc_batch_size];
 113   unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
 114   int names_count = 0;
 115 
 116   // parsing  Index 0 is unused
 117   for (int index = 1; index < length; index++) {
 118     // Each of the following case guarantees one more byte in the stream
 119     // for the following tag or the access_flags following constant pool,
 120     // so we don't need bounds-check for reading tag.
 121     u1 tag = cfs->get_u1_fast();
 122     switch (tag) {
 123       case JVM_CONSTANT_Class :
 124         {
 125           cfs->guarantee_more(3, CHECK);  // name_index, tag/access_flags
 126           u2 name_index = cfs->get_u2_fast();
 127           cp->klass_index_at_put(index, name_index);
 128         }
 129         break;
 130       case JVM_CONSTANT_Fieldref :
 131         {
 132           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 133           u2 class_index = cfs->get_u2_fast();
 134           u2 name_and_type_index = cfs->get_u2_fast();
 135           cp->field_at_put(index, class_index, name_and_type_index);
 136         }
 137         break;
 138       case JVM_CONSTANT_Methodref :
 139         {
 140           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 141           u2 class_index = cfs->get_u2_fast();
 142           u2 name_and_type_index = cfs->get_u2_fast();
 143           cp->method_at_put(index, class_index, name_and_type_index);
 144         }
 145         break;
 146       case JVM_CONSTANT_InterfaceMethodref :
 147         {
 148           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 149           u2 class_index = cfs->get_u2_fast();
 150           u2 name_and_type_index = cfs->get_u2_fast();
 151           cp->interface_method_at_put(index, class_index, name_and_type_index);
 152         }
 153         break;
 154       case JVM_CONSTANT_String :
 155         {
 156           cfs->guarantee_more(3, CHECK);  // string_index, tag/access_flags
 157           u2 string_index = cfs->get_u2_fast();
 158           cp->string_index_at_put(index, string_index);
 159         }
 160         break;
 161       case JVM_CONSTANT_MethodHandle :
 162       case JVM_CONSTANT_MethodType :
 163         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 164           classfile_parse_error(
 165             "Class file version does not support constant tag %u in class file %s",
 166             tag, CHECK);
 167         }
 168         if (!EnableInvokeDynamic) {
 169           classfile_parse_error(
 170             "This JVM does not support constant tag %u in class file %s",
 171             tag, CHECK);
 172         }
 173         if (tag == JVM_CONSTANT_MethodHandle) {
 174           cfs->guarantee_more(4, CHECK);  // ref_kind, method_index, tag/access_flags
 175           u1 ref_kind = cfs->get_u1_fast();
 176           u2 method_index = cfs->get_u2_fast();
 177           cp->method_handle_index_at_put(index, ref_kind, method_index);
 178         } else if (tag == JVM_CONSTANT_MethodType) {
 179           cfs->guarantee_more(3, CHECK);  // signature_index, tag/access_flags
 180           u2 signature_index = cfs->get_u2_fast();
 181           cp->method_type_index_at_put(index, signature_index);
 182         } else {
 183           ShouldNotReachHere();
 184         }
 185         break;
 186       case JVM_CONSTANT_InvokeDynamic :
 187         {
 188           if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 189             classfile_parse_error(
 190               "Class file version does not support constant tag %u in class file %s",
 191               tag, CHECK);
 192           }
 193           if (!EnableInvokeDynamic) {
 194             classfile_parse_error(
 195               "This JVM does not support constant tag %u in class file %s",
 196               tag, CHECK);
 197           }
 198           cfs->guarantee_more(5, CHECK);  // bsm_index, nt, tag/access_flags
 199           u2 bootstrap_specifier_index = cfs->get_u2_fast();
 200           u2 name_and_type_index = cfs->get_u2_fast();
 201           if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
 202             _max_bootstrap_specifier_index = (int) bootstrap_specifier_index;  // collect for later
 203           cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
 204         }
 205         break;
 206       case JVM_CONSTANT_Integer :
 207         {
 208           cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 209           u4 bytes = cfs->get_u4_fast();
 210           cp->int_at_put(index, (jint) bytes);
 211         }
 212         break;
 213       case JVM_CONSTANT_Float :
 214         {
 215           cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 216           u4 bytes = cfs->get_u4_fast();
 217           cp->float_at_put(index, *(jfloat*)&bytes);
 218         }
 219         break;
 220       case JVM_CONSTANT_Long :
 221         // A mangled type might cause you to overrun allocated memory
 222         guarantee_property(index+1 < length,
 223                            "Invalid constant pool entry %u in class file %s",
 224                            index, CHECK);
 225         {
 226           cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 227           u8 bytes = cfs->get_u8_fast();
 228           cp->long_at_put(index, bytes);
 229         }
 230         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 231         break;
 232       case JVM_CONSTANT_Double :
 233         // A mangled type might cause you to overrun allocated memory
 234         guarantee_property(index+1 < length,
 235                            "Invalid constant pool entry %u in class file %s",
 236                            index, CHECK);
 237         {
 238           cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 239           u8 bytes = cfs->get_u8_fast();
 240           cp->double_at_put(index, *(jdouble*)&bytes);
 241         }
 242         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 243         break;
 244       case JVM_CONSTANT_NameAndType :
 245         {
 246           cfs->guarantee_more(5, CHECK);  // name_index, signature_index, tag/access_flags
 247           u2 name_index = cfs->get_u2_fast();
 248           u2 signature_index = cfs->get_u2_fast();
 249           cp->name_and_type_at_put(index, name_index, signature_index);
 250         }
 251         break;
 252       case JVM_CONSTANT_Utf8 :
 253         {
 254           cfs->guarantee_more(2, CHECK);  // utf8_length
 255           u2  utf8_length = cfs->get_u2_fast();
 256           u1* utf8_buffer = cfs->get_u1_buffer();
 257           assert(utf8_buffer != NULL, "null utf8 buffer");
 258           // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
 259           cfs->guarantee_more(utf8_length+1, CHECK);  // utf8 string, tag/access_flags
 260           cfs->skip_u1_fast(utf8_length);
 261 
 262           // Before storing the symbol, make sure it's legal
 263           if (_need_verify) {
 264             verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
 265           }
 266 
 267           if (EnableInvokeDynamic && has_cp_patch_at(index)) {
 268             Handle patch = clear_cp_patch_at(index);
 269             guarantee_property(java_lang_String::is_instance(patch()),
 270                                "Illegal utf8 patch at %d in class file %s",
 271                                index, CHECK);
 272             char* str = java_lang_String::as_utf8_string(patch());
 273             // (could use java_lang_String::as_symbol instead, but might as well batch them)
 274             utf8_buffer = (u1*) str;
 275             utf8_length = (int) strlen(str);
 276           }
 277 
 278           unsigned int hash;
 279           Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
 280           if (result == NULL) {
 281             names[names_count] = (char*)utf8_buffer;
 282             lengths[names_count] = utf8_length;
 283             indices[names_count] = index;
 284             hashValues[names_count++] = hash;
 285             if (names_count == SymbolTable::symbol_alloc_batch_size) {
 286               SymbolTable::new_symbols(loader_data, cp, names_count, names, lengths, indices, hashValues, CHECK);
 287               names_count = 0;
 288             }
 289           } else {
 290             cp->symbol_at_put(index, result);
 291           }
 292         }
 293         break;
 294       default:
 295         classfile_parse_error(
 296           "Unknown constant tag %u in class file %s", tag, CHECK);
 297         break;
 298     }
 299   }
 300 
 301   // Allocate the remaining symbols
 302   if (names_count > 0) {
 303     SymbolTable::new_symbols(loader_data, cp, names_count, names, lengths, indices, hashValues, CHECK);
 304   }
 305 
 306   // Copy _current pointer of local copy back to stream().
 307 #ifdef ASSERT
 308   assert(cfs0->current() == old_current, "non-exclusive use of stream()");
 309 #endif
 310   cfs0->set_current(cfs1.current());
 311 }
 312 
 313 // This class unreferences constant pool symbols if an error has occurred
 314 // while parsing the class before it is assigned into the class.
 315 // If it gets an error after that it is unloaded and the constant pool will
 316 // be cleaned up then.
 317 class ConstantPoolCleaner : public StackObj {
 318   constantPoolHandle _cphandle;
 319   bool               _in_error;
 320  public:
 321   ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {}
 322   ~ConstantPoolCleaner() {
 323     if (_in_error && _cphandle.not_null()) {
 324       _cphandle->unreference_symbols();
 325     }
 326   }
 327   void set_in_error(bool clean) { _in_error = clean; }
 328 };
 329 
 330 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
 331 
 332 inline Symbol* check_symbol_at(constantPoolHandle cp, int index) {
 333   if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8())
 334     return cp->symbol_at(index);
 335   else
 336     return NULL;
 337 }
 338 
 339 constantPoolHandle ClassFileParser::parse_constant_pool(ClassLoaderData* loader_data, TRAPS) {
 340   ClassFileStream* cfs = stream();
 341   constantPoolHandle nullHandle;
 342 
 343   cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
 344   u2 length = cfs->get_u2_fast();
 345   guarantee_property(
 346     length >= 1, "Illegal constant pool size %u in class file %s",
 347     length, CHECK_(nullHandle));
 348   ConstantPool* constant_pool =
 349                       ConstantPool::allocate(loader_data,
 350                                                     length,
 351                                                    CHECK_(nullHandle));
 352   constantPoolHandle cp (THREAD, constant_pool);
 353 
 354   ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up.
 355 
 356   // parsing constant pool entries
 357   parse_constant_pool_entries(loader_data, cp, length, CHECK_(nullHandle));
 358 
 359   int index = 1;  // declared outside of loops for portability
 360 
 361   // first verification pass - validate cross references and fixup class and string constants
 362   for (index = 1; index < length; index++) {          // Index 0 is unused
 363     jbyte tag = cp->tag_at(index).value();
 364     switch (tag) {
 365       case JVM_CONSTANT_Class :
 366         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 367         break;
 368       case JVM_CONSTANT_Fieldref :
 369         // fall through
 370       case JVM_CONSTANT_Methodref :
 371         // fall through
 372       case JVM_CONSTANT_InterfaceMethodref : {
 373         if (!_need_verify) break;
 374         int klass_ref_index = cp->klass_ref_index_at(index);
 375         int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
 376         check_property(valid_cp_range(klass_ref_index, length) &&
 377                        is_klass_reference(cp, klass_ref_index),
 378                        "Invalid constant pool index %u in class file %s",
 379                        klass_ref_index,
 380                        CHECK_(nullHandle));
 381         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 382                        cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 383                        "Invalid constant pool index %u in class file %s",
 384                        name_and_type_ref_index,
 385                        CHECK_(nullHandle));
 386         break;
 387       }
 388       case JVM_CONSTANT_String :
 389         ShouldNotReachHere();     // Only JVM_CONSTANT_StringIndex should be present
 390         break;
 391       case JVM_CONSTANT_Integer :
 392         break;
 393       case JVM_CONSTANT_Float :
 394         break;
 395       case JVM_CONSTANT_Long :
 396       case JVM_CONSTANT_Double :
 397         index++;
 398         check_property(
 399           (index < length && cp->tag_at(index).is_invalid()),
 400           "Improper constant pool long/double index %u in class file %s",
 401           index, CHECK_(nullHandle));
 402         break;
 403       case JVM_CONSTANT_NameAndType : {
 404         if (!_need_verify) break;
 405         int name_ref_index = cp->name_ref_index_at(index);
 406         int signature_ref_index = cp->signature_ref_index_at(index);
 407         check_property(
 408           valid_cp_range(name_ref_index, length) &&
 409             cp->tag_at(name_ref_index).is_utf8(),
 410           "Invalid constant pool index %u in class file %s",
 411           name_ref_index, CHECK_(nullHandle));
 412         check_property(
 413           valid_cp_range(signature_ref_index, length) &&
 414             cp->tag_at(signature_ref_index).is_utf8(),
 415           "Invalid constant pool index %u in class file %s",
 416           signature_ref_index, CHECK_(nullHandle));
 417         break;
 418       }
 419       case JVM_CONSTANT_Utf8 :
 420         break;
 421       case JVM_CONSTANT_UnresolvedClass :         // fall-through
 422       case JVM_CONSTANT_UnresolvedClassInError:
 423         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 424         break;
 425       case JVM_CONSTANT_ClassIndex :
 426         {
 427           int class_index = cp->klass_index_at(index);
 428           check_property(
 429             valid_cp_range(class_index, length) &&
 430               cp->tag_at(class_index).is_utf8(),
 431             "Invalid constant pool index %u in class file %s",
 432             class_index, CHECK_(nullHandle));
 433           cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
 434         }
 435         break;
 436       case JVM_CONSTANT_StringIndex :
 437         {
 438           int string_index = cp->string_index_at(index);
 439           check_property(
 440             valid_cp_range(string_index, length) &&
 441               cp->tag_at(string_index).is_utf8(),
 442             "Invalid constant pool index %u in class file %s",
 443             string_index, CHECK_(nullHandle));
 444           Symbol* sym = cp->symbol_at(string_index);
 445           cp->unresolved_string_at_put(index, sym);
 446         }
 447         break;
 448       case JVM_CONSTANT_MethodHandle :
 449         {
 450           int ref_index = cp->method_handle_index_at(index);
 451           check_property(
 452             valid_cp_range(ref_index, length) &&
 453                 EnableInvokeDynamic,
 454               "Invalid constant pool index %u in class file %s",
 455               ref_index, CHECK_(nullHandle));
 456           constantTag tag = cp->tag_at(ref_index);
 457           int ref_kind  = cp->method_handle_ref_kind_at(index);
 458           switch (ref_kind) {
 459           case JVM_REF_getField:
 460           case JVM_REF_getStatic:
 461           case JVM_REF_putField:
 462           case JVM_REF_putStatic:
 463             check_property(
 464               tag.is_field(),
 465               "Invalid constant pool index %u in class file %s (not a field)",
 466               ref_index, CHECK_(nullHandle));
 467             break;
 468           case JVM_REF_invokeVirtual:
 469           case JVM_REF_invokeStatic:
 470           case JVM_REF_invokeSpecial:
 471           case JVM_REF_newInvokeSpecial:
 472             check_property(
 473               tag.is_method(),
 474               "Invalid constant pool index %u in class file %s (not a method)",
 475               ref_index, CHECK_(nullHandle));
 476             break;
 477           case JVM_REF_invokeInterface:
 478             check_property(
 479               tag.is_interface_method(),
 480               "Invalid constant pool index %u in class file %s (not an interface method)",
 481               ref_index, CHECK_(nullHandle));
 482             break;
 483           default:
 484             classfile_parse_error(
 485               "Bad method handle kind at constant pool index %u in class file %s",
 486               index, CHECK_(nullHandle));
 487           }
 488           // Keep the ref_index unchanged.  It will be indirected at link-time.
 489         }
 490         break;
 491       case JVM_CONSTANT_MethodType :
 492         {
 493           int ref_index = cp->method_type_index_at(index);
 494           check_property(
 495             valid_cp_range(ref_index, length) &&
 496                 cp->tag_at(ref_index).is_utf8() &&
 497                 EnableInvokeDynamic,
 498               "Invalid constant pool index %u in class file %s",
 499               ref_index, CHECK_(nullHandle));
 500         }
 501         break;
 502       case JVM_CONSTANT_InvokeDynamic :
 503         {
 504           int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
 505           check_property(valid_cp_range(name_and_type_ref_index, length) &&
 506                          cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 507                          "Invalid constant pool index %u in class file %s",
 508                          name_and_type_ref_index,
 509                          CHECK_(nullHandle));
 510           // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
 511           break;
 512         }
 513       default:
 514         fatal(err_msg("bad constant pool tag value %u",
 515                       cp->tag_at(index).value()));
 516         ShouldNotReachHere();
 517         break;
 518     } // end of switch
 519   } // end of for
 520 
 521   if (_cp_patches != NULL) {
 522     // need to treat this_class specially...
 523     assert(EnableInvokeDynamic, "");
 524     int this_class_index;
 525     {
 526       cfs->guarantee_more(8, CHECK_(nullHandle));  // flags, this_class, super_class, infs_len
 527       u1* mark = cfs->current();
 528       u2 flags         = cfs->get_u2_fast();
 529       this_class_index = cfs->get_u2_fast();
 530       cfs->set_current(mark);  // revert to mark
 531     }
 532 
 533     for (index = 1; index < length; index++) {          // Index 0 is unused
 534       if (has_cp_patch_at(index)) {
 535         guarantee_property(index != this_class_index,
 536                            "Illegal constant pool patch to self at %d in class file %s",
 537                            index, CHECK_(nullHandle));
 538         patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
 539       }
 540     }
 541   }
 542 
 543   if (!_need_verify) {
 544     cp_in_error.set_in_error(false);
 545     return cp;
 546   }
 547 
 548   // second verification pass - checks the strings are of the right format.
 549   // but not yet to the other entries
 550   for (index = 1; index < length; index++) {
 551     jbyte tag = cp->tag_at(index).value();
 552     switch (tag) {
 553       case JVM_CONSTANT_UnresolvedClass: {
 554         Symbol*  class_name = cp->unresolved_klass_at(index);
 555         // check the name, even if _cp_patches will overwrite it
 556         verify_legal_class_name(class_name, CHECK_(nullHandle));
 557         break;
 558       }
 559       case JVM_CONSTANT_NameAndType: {
 560         if (_need_verify && _major_version >= JAVA_7_VERSION) {
 561           int sig_index = cp->signature_ref_index_at(index);
 562           int name_index = cp->name_ref_index_at(index);
 563           Symbol*  name = cp->symbol_at(name_index);
 564           Symbol*  sig = cp->symbol_at(sig_index);
 565           if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
 566             verify_legal_method_signature(name, sig, CHECK_(nullHandle));
 567           } else {
 568             verify_legal_field_signature(name, sig, CHECK_(nullHandle));
 569           }
 570         }
 571         break;
 572       }
 573       case JVM_CONSTANT_InvokeDynamic:
 574       case JVM_CONSTANT_Fieldref:
 575       case JVM_CONSTANT_Methodref:
 576       case JVM_CONSTANT_InterfaceMethodref: {
 577         int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
 578         // already verified to be utf8
 579         int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
 580         // already verified to be utf8
 581         int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
 582         Symbol*  name = cp->symbol_at(name_ref_index);
 583         Symbol*  signature = cp->symbol_at(signature_ref_index);
 584         if (tag == JVM_CONSTANT_Fieldref) {
 585           verify_legal_field_name(name, CHECK_(nullHandle));
 586           if (_need_verify && _major_version >= JAVA_7_VERSION) {
 587             // Signature is verified above, when iterating NameAndType_info.
 588             // Need only to be sure it's the right type.
 589             if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
 590               throwIllegalSignature(
 591                   "Field", name, signature, CHECK_(nullHandle));
 592             }
 593           } else {
 594             verify_legal_field_signature(name, signature, CHECK_(nullHandle));
 595           }
 596         } else {
 597           verify_legal_method_name(name, CHECK_(nullHandle));
 598           if (_need_verify && _major_version >= JAVA_7_VERSION) {
 599             // Signature is verified above, when iterating NameAndType_info.
 600             // Need only to be sure it's the right type.
 601             if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
 602               throwIllegalSignature(
 603                   "Method", name, signature, CHECK_(nullHandle));
 604             }
 605           } else {
 606             verify_legal_method_signature(name, signature, CHECK_(nullHandle));
 607           }
 608           if (tag == JVM_CONSTANT_Methodref) {
 609             // 4509014: If a class method name begins with '<', it must be "<init>".
 610             assert(name != NULL, "method name in constant pool is null");
 611             unsigned int name_len = name->utf8_length();
 612             assert(name_len > 0, "bad method name");  // already verified as legal name
 613             if (name->byte_at(0) == '<') {
 614               if (name != vmSymbols::object_initializer_name()) {
 615                 classfile_parse_error(
 616                   "Bad method name at constant pool index %u in class file %s",
 617                   name_ref_index, CHECK_(nullHandle));
 618               }
 619             }
 620           }
 621         }
 622         break;
 623       }
 624       case JVM_CONSTANT_MethodHandle: {
 625         int ref_index = cp->method_handle_index_at(index);
 626         int ref_kind  = cp->method_handle_ref_kind_at(index);
 627         switch (ref_kind) {
 628         case JVM_REF_invokeVirtual:
 629         case JVM_REF_invokeStatic:
 630         case JVM_REF_invokeSpecial:
 631         case JVM_REF_newInvokeSpecial:
 632           {
 633             int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
 634             int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
 635             Symbol*  name = cp->symbol_at(name_ref_index);
 636             if (ref_kind == JVM_REF_newInvokeSpecial) {
 637               if (name != vmSymbols::object_initializer_name()) {
 638                 classfile_parse_error(
 639                   "Bad constructor name at constant pool index %u in class file %s",
 640                   name_ref_index, CHECK_(nullHandle));
 641               }
 642             } else {
 643               if (name == vmSymbols::object_initializer_name()) {
 644                 classfile_parse_error(
 645                   "Bad method name at constant pool index %u in class file %s",
 646                   name_ref_index, CHECK_(nullHandle));
 647               }
 648             }
 649           }
 650           break;
 651           // Other ref_kinds are already fully checked in previous pass.
 652         }
 653         break;
 654       }
 655       case JVM_CONSTANT_MethodType: {
 656         Symbol* no_name = vmSymbols::type_name(); // place holder
 657         Symbol*  signature = cp->method_type_signature_at(index);
 658         verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
 659         break;
 660       }
 661       case JVM_CONSTANT_Utf8: {
 662         assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
 663       }
 664     }  // end of switch
 665   }  // end of for
 666 
 667   cp_in_error.set_in_error(false);
 668   return cp;
 669 }
 670 
 671 
 672 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
 673   assert(EnableInvokeDynamic, "");
 674   BasicType patch_type = T_VOID;
 675 
 676   switch (cp->tag_at(index).value()) {
 677 
 678   case JVM_CONSTANT_UnresolvedClass :
 679     // Patching a class means pre-resolving it.
 680     // The name in the constant pool is ignored.
 681     if (java_lang_Class::is_instance(patch())) {
 682       guarantee_property(!java_lang_Class::is_primitive(patch()),
 683                          "Illegal class patch at %d in class file %s",
 684                          index, CHECK);
 685       cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
 686     } else {
 687       guarantee_property(java_lang_String::is_instance(patch()),
 688                          "Illegal class patch at %d in class file %s",
 689                          index, CHECK);
 690       Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
 691       cp->unresolved_klass_at_put(index, name);
 692     }
 693     break;
 694 
 695   case JVM_CONSTANT_String :
 696     // skip this patch and don't clear it.  Needs the oop array for resolved
 697     // references to be created first.
 698     return;
 699 
 700   case JVM_CONSTANT_Integer : patch_type = T_INT;    goto patch_prim;
 701   case JVM_CONSTANT_Float :   patch_type = T_FLOAT;  goto patch_prim;
 702   case JVM_CONSTANT_Long :    patch_type = T_LONG;   goto patch_prim;
 703   case JVM_CONSTANT_Double :  patch_type = T_DOUBLE; goto patch_prim;
 704   patch_prim:
 705     {
 706       jvalue value;
 707       BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
 708       guarantee_property(value_type == patch_type,
 709                          "Illegal primitive patch at %d in class file %s",
 710                          index, CHECK);
 711       switch (value_type) {
 712       case T_INT:    cp->int_at_put(index,   value.i); break;
 713       case T_FLOAT:  cp->float_at_put(index, value.f); break;
 714       case T_LONG:   cp->long_at_put(index,  value.j); break;
 715       case T_DOUBLE: cp->double_at_put(index, value.d); break;
 716       default:       assert(false, "");
 717       }
 718     }
 719     break;
 720 
 721   default:
 722     // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
 723     guarantee_property(!has_cp_patch_at(index),
 724                        "Illegal unexpected patch at %d in class file %s",
 725                        index, CHECK);
 726     return;
 727   }
 728 
 729   // On fall-through, mark the patch as used.
 730   clear_cp_patch_at(index);
 731 }
 732 
 733 
 734 
 735 class NameSigHash: public ResourceObj {
 736  public:
 737   Symbol*       _name;       // name
 738   Symbol*       _sig;        // signature
 739   NameSigHash*  _next;       // Next entry in hash table
 740 };
 741 
 742 
 743 #define HASH_ROW_SIZE 256
 744 
 745 unsigned int hash(Symbol* name, Symbol* sig) {
 746   unsigned int raw_hash = 0;
 747   raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
 748   raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
 749 
 750   return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
 751 }
 752 
 753 
 754 void initialize_hashtable(NameSigHash** table) {
 755   memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
 756 }
 757 
 758 // Return false if the name/sig combination is found in table.
 759 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
 760 // The old format checker uses heap sort to find duplicates.
 761 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
 762 // of table since we don't expect Symbol*'s to move.
 763 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
 764   assert(name != NULL, "name in constant pool is NULL");
 765 
 766   // First lookup for duplicates
 767   int index = hash(name, sig);
 768   NameSigHash* entry = table[index];
 769   while (entry != NULL) {
 770     if (entry->_name == name && entry->_sig == sig) {
 771       return false;
 772     }
 773     entry = entry->_next;
 774   }
 775 
 776   // No duplicate is found, allocate a new entry and fill it.
 777   entry = new NameSigHash();
 778   entry->_name = name;
 779   entry->_sig = sig;
 780 
 781   // Insert into hash table
 782   entry->_next = table[index];
 783   table[index] = entry;
 784 
 785   return true;
 786 }
 787 
 788 
 789 Array<Klass*>* ClassFileParser::parse_interfaces(constantPoolHandle cp,
 790                                                  int length,
 791                                                  ClassLoaderData* loader_data,
 792                                                  Handle protection_domain,
 793                                                  Symbol* class_name,
 794                                                  bool* has_default_methods,
 795                                                  TRAPS) {
 796   ClassFileStream* cfs = stream();
 797   assert(length > 0, "only called for length>0");
 798   // FIXME: Leak at later OOM.
 799   Array<Klass*>* interfaces = MetadataFactory::new_array<Klass*>(loader_data, length, NULL, CHECK_NULL);
 800 
 801   int index;
 802   for (index = 0; index < length; index++) {
 803     u2 interface_index = cfs->get_u2(CHECK_NULL);
 804     KlassHandle interf;
 805     check_property(
 806       valid_cp_range(interface_index, cp->length()) &&
 807       is_klass_reference(cp, interface_index),
 808       "Interface name has bad constant pool index %u in class file %s",
 809       interface_index, CHECK_NULL);
 810     if (cp->tag_at(interface_index).is_klass()) {
 811       interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
 812     } else {
 813       Symbol*  unresolved_klass  = cp->klass_name_at(interface_index);
 814 
 815       // Don't need to check legal name because it's checked when parsing constant pool.
 816       // But need to make sure it's not an array type.
 817       guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
 818                          "Bad interface name in class file %s", CHECK_NULL);
 819       Handle class_loader(THREAD, loader_data->class_loader());
 820 
 821       // Call resolve_super so classcircularity is checked
 822       Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
 823                     unresolved_klass, class_loader, protection_domain,
 824                     false, CHECK_NULL);
 825       interf = KlassHandle(THREAD, k);
 826     }
 827 
 828     if (!interf()->is_interface()) {
 829       THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL);
 830     }
 831     if (InstanceKlass::cast(interf())->has_default_methods()) {
 832       *has_default_methods = true;
 833     }
 834     interfaces->at_put(index, interf());
 835   }
 836 
 837   if (!_need_verify || length <= 1) {
 838     return interfaces;
 839   }
 840 
 841   // Check if there's any duplicates in interfaces
 842   ResourceMark rm(THREAD);
 843   NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
 844     THREAD, NameSigHash*, HASH_ROW_SIZE);
 845   initialize_hashtable(interface_names);
 846   bool dup = false;
 847   {
 848     debug_only(No_Safepoint_Verifier nsv;)
 849     for (index = 0; index < length; index++) {
 850       Klass* k = interfaces->at(index);
 851       Symbol* name = InstanceKlass::cast(k)->name();
 852       // If no duplicates, add (name, NULL) in hashtable interface_names.
 853       if (!put_after_lookup(name, NULL, interface_names)) {
 854         dup = true;
 855         break;
 856       }
 857     }
 858   }
 859   if (dup) {
 860     classfile_parse_error("Duplicate interface name in class file %s", CHECK_NULL);
 861   }
 862 
 863   return interfaces;
 864 }
 865 
 866 
 867 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
 868   // Make sure the constant pool entry is of a type appropriate to this field
 869   guarantee_property(
 870     (constantvalue_index > 0 &&
 871       constantvalue_index < cp->length()),
 872     "Bad initial value index %u in ConstantValue attribute in class file %s",
 873     constantvalue_index, CHECK);
 874   constantTag value_type = cp->tag_at(constantvalue_index);
 875   switch ( cp->basic_type_for_signature_at(signature_index) ) {
 876     case T_LONG:
 877       guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
 878       break;
 879     case T_FLOAT:
 880       guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
 881       break;
 882     case T_DOUBLE:
 883       guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
 884       break;
 885     case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
 886       guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
 887       break;
 888     case T_OBJECT:
 889       guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
 890                          && value_type.is_string()),
 891                          "Bad string initial value in class file %s", CHECK);
 892       break;
 893     default:
 894       classfile_parse_error(
 895         "Unable to set initial value %u in class file %s",
 896         constantvalue_index, CHECK);
 897   }
 898 }
 899 
 900 
 901 // Parse attributes for a field.
 902 void ClassFileParser::parse_field_attributes(ClassLoaderData* loader_data,
 903                                              constantPoolHandle cp,
 904                                              u2 attributes_count,
 905                                              bool is_static, u2 signature_index,
 906                                              u2* constantvalue_index_addr,
 907                                              bool* is_synthetic_addr,
 908                                              u2* generic_signature_index_addr,
 909                                              AnnotationArray** field_annotations,
 910                                              AnnotationArray** field_type_annotations,
 911                                              ClassFileParser::FieldAnnotationCollector* parsed_annotations,
 912                                              TRAPS) {
 913   ClassFileStream* cfs = stream();
 914   assert(attributes_count > 0, "length should be greater than 0");
 915   u2 constantvalue_index = 0;
 916   u2 generic_signature_index = 0;
 917   bool is_synthetic = false;
 918   u1* runtime_visible_annotations = NULL;
 919   int runtime_visible_annotations_length = 0;
 920   u1* runtime_invisible_annotations = NULL;
 921   int runtime_invisible_annotations_length = 0;
 922   u1* runtime_visible_type_annotations = NULL;
 923   int runtime_visible_type_annotations_length = 0;
 924   u1* runtime_invisible_type_annotations = NULL;
 925   int runtime_invisible_type_annotations_length = 0;
 926   while (attributes_count--) {
 927     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
 928     u2 attribute_name_index = cfs->get_u2_fast();
 929     u4 attribute_length = cfs->get_u4_fast();
 930     check_property(valid_cp_range(attribute_name_index, cp->length()) &&
 931                    cp->tag_at(attribute_name_index).is_utf8(),
 932                    "Invalid field attribute index %u in class file %s",
 933                    attribute_name_index,
 934                    CHECK);
 935     Symbol* attribute_name = cp->symbol_at(attribute_name_index);
 936     if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
 937       // ignore if non-static
 938       if (constantvalue_index != 0) {
 939         classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
 940       }
 941       check_property(
 942         attribute_length == 2,
 943         "Invalid ConstantValue field attribute length %u in class file %s",
 944         attribute_length, CHECK);
 945       constantvalue_index = cfs->get_u2(CHECK);
 946       if (_need_verify) {
 947         verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
 948       }
 949     } else if (attribute_name == vmSymbols::tag_synthetic()) {
 950       if (attribute_length != 0) {
 951         classfile_parse_error(
 952           "Invalid Synthetic field attribute length %u in class file %s",
 953           attribute_length, CHECK);
 954       }
 955       is_synthetic = true;
 956     } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
 957       if (attribute_length != 0) {
 958         classfile_parse_error(
 959           "Invalid Deprecated field attribute length %u in class file %s",
 960           attribute_length, CHECK);
 961       }
 962     } else if (_major_version >= JAVA_1_5_VERSION) {
 963       if (attribute_name == vmSymbols::tag_signature()) {
 964         if (attribute_length != 2) {
 965           classfile_parse_error(
 966             "Wrong size %u for field's Signature attribute in class file %s",
 967             attribute_length, CHECK);
 968         }
 969         generic_signature_index = cfs->get_u2(CHECK);
 970       } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
 971         runtime_visible_annotations_length = attribute_length;
 972         runtime_visible_annotations = cfs->get_u1_buffer();
 973         assert(runtime_visible_annotations != NULL, "null visible annotations");
 974         parse_annotations(loader_data,
 975                           runtime_visible_annotations,
 976                           runtime_visible_annotations_length,
 977                           cp,
 978                           parsed_annotations,
 979                           CHECK);
 980         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
 981       } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
 982         runtime_invisible_annotations_length = attribute_length;
 983         runtime_invisible_annotations = cfs->get_u1_buffer();
 984         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
 985         cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
 986       } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
 987         runtime_visible_type_annotations_length = attribute_length;
 988         runtime_visible_type_annotations = cfs->get_u1_buffer();
 989         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
 990         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
 991       } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
 992         runtime_invisible_type_annotations_length = attribute_length;
 993         runtime_invisible_type_annotations = cfs->get_u1_buffer();
 994         assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
 995         cfs->skip_u1(runtime_invisible_type_annotations_length, CHECK);
 996       } else {
 997         cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
 998       }
 999     } else {
1000       cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1001     }
1002   }
1003 
1004   *constantvalue_index_addr = constantvalue_index;
1005   *is_synthetic_addr = is_synthetic;
1006   *generic_signature_index_addr = generic_signature_index;
1007   *field_annotations = assemble_annotations(loader_data,
1008                                             runtime_visible_annotations,
1009                                             runtime_visible_annotations_length,
1010                                             runtime_invisible_annotations,
1011                                             runtime_invisible_annotations_length,
1012                                             CHECK);
1013   *field_type_annotations = assemble_annotations(loader_data,
1014                                             runtime_visible_type_annotations,
1015                                             runtime_visible_type_annotations_length,
1016                                             runtime_invisible_type_annotations,
1017                                             runtime_invisible_type_annotations_length,
1018                                             CHECK);
1019   return;
1020 }
1021 
1022 
1023 // Field allocation types. Used for computing field offsets.
1024 
1025 enum FieldAllocationType {
1026   STATIC_OOP,           // Oops
1027   STATIC_BYTE,          // Boolean, Byte, char
1028   STATIC_SHORT,         // shorts
1029   STATIC_WORD,          // ints
1030   STATIC_DOUBLE,        // aligned long or double
1031   NONSTATIC_OOP,
1032   NONSTATIC_BYTE,
1033   NONSTATIC_SHORT,
1034   NONSTATIC_WORD,
1035   NONSTATIC_DOUBLE,
1036   MAX_FIELD_ALLOCATION_TYPE,
1037   BAD_ALLOCATION_TYPE = -1
1038 };
1039 
1040 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1041   BAD_ALLOCATION_TYPE, // 0
1042   BAD_ALLOCATION_TYPE, // 1
1043   BAD_ALLOCATION_TYPE, // 2
1044   BAD_ALLOCATION_TYPE, // 3
1045   NONSTATIC_BYTE ,     // T_BOOLEAN     =  4,
1046   NONSTATIC_SHORT,     // T_CHAR        =  5,
1047   NONSTATIC_WORD,      // T_FLOAT       =  6,
1048   NONSTATIC_DOUBLE,    // T_DOUBLE      =  7,
1049   NONSTATIC_BYTE,      // T_BYTE        =  8,
1050   NONSTATIC_SHORT,     // T_SHORT       =  9,
1051   NONSTATIC_WORD,      // T_INT         = 10,
1052   NONSTATIC_DOUBLE,    // T_LONG        = 11,
1053   NONSTATIC_OOP,       // T_OBJECT      = 12,
1054   NONSTATIC_OOP,       // T_ARRAY       = 13,
1055   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1056   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1057   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1058   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1059   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1060   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1061   BAD_ALLOCATION_TYPE, // 0
1062   BAD_ALLOCATION_TYPE, // 1
1063   BAD_ALLOCATION_TYPE, // 2
1064   BAD_ALLOCATION_TYPE, // 3
1065   STATIC_BYTE ,        // T_BOOLEAN     =  4,
1066   STATIC_SHORT,        // T_CHAR        =  5,
1067   STATIC_WORD,         // T_FLOAT       =  6,
1068   STATIC_DOUBLE,       // T_DOUBLE      =  7,
1069   STATIC_BYTE,         // T_BYTE        =  8,
1070   STATIC_SHORT,        // T_SHORT       =  9,
1071   STATIC_WORD,         // T_INT         = 10,
1072   STATIC_DOUBLE,       // T_LONG        = 11,
1073   STATIC_OOP,          // T_OBJECT      = 12,
1074   STATIC_OOP,          // T_ARRAY       = 13,
1075   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1076   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1077   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1078   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1079   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1080   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1081 };
1082 
1083 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1084   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1085   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1086   assert(result != BAD_ALLOCATION_TYPE, "bad type");
1087   return result;
1088 }
1089 
1090 class FieldAllocationCount: public ResourceObj {
1091  public:
1092   u2 count[MAX_FIELD_ALLOCATION_TYPE];
1093 
1094   FieldAllocationCount() {
1095     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1096       count[i] = 0;
1097     }
1098   }
1099 
1100   FieldAllocationType update(bool is_static, BasicType type) {
1101     FieldAllocationType atype = basic_type_to_atype(is_static, type);
1102     // Make sure there is no overflow with injected fields.
1103     assert(count[atype] < 0xFFFF, "More than 65535 fields");
1104     count[atype]++;
1105     return atype;
1106   }
1107 };
1108 
1109 Array<u2>* ClassFileParser::parse_fields(ClassLoaderData* loader_data,
1110                                          Symbol* class_name,
1111                                          constantPoolHandle cp,
1112                                          bool is_interface,
1113                                          FieldAllocationCount *fac,
1114                                          Array<AnnotationArray*>** fields_annotations,
1115                                          Array<AnnotationArray*>** fields_type_annotations,
1116                                          u2* java_fields_count_ptr, TRAPS) {
1117   ClassFileStream* cfs = stream();
1118   cfs->guarantee_more(2, CHECK_NULL);  // length
1119   u2 length = cfs->get_u2_fast();
1120   *java_fields_count_ptr = length;
1121 
1122   int num_injected = 0;
1123   InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1124   int total_fields = length + num_injected;
1125 
1126   // The field array starts with tuples of shorts
1127   // [access, name index, sig index, initial value index, byte offset].
1128   // A generic signature slot only exists for field with generic
1129   // signature attribute. And the access flag is set with
1130   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1131   // signature slots are at the end of the field array and after all
1132   // other fields data.
1133   //
1134   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1135   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1136   //       ...
1137   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1138   //       [generic signature index]
1139   //       [generic signature index]
1140   //       ...
1141   //
1142   // Allocate a temporary resource array for field data. For each field,
1143   // a slot is reserved in the temporary array for the generic signature
1144   // index. After parsing all fields, the data are copied to a permanent
1145   // array and any unused slots will be discarded.
1146   ResourceMark rm(THREAD);
1147   u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1148              THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1149 
1150   AnnotationArray* field_annotations = NULL;
1151   AnnotationArray* field_type_annotations = NULL;
1152   // The generic signature slots start after all other fields' data.
1153   int generic_signature_slot = total_fields * FieldInfo::field_slots;
1154   int num_generic_signature = 0;
1155   for (int n = 0; n < length; n++) {
1156     cfs->guarantee_more(8, CHECK_NULL);  // access_flags, name_index, descriptor_index, attributes_count
1157 
1158     AccessFlags access_flags;
1159     jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1160     verify_legal_field_modifiers(flags, is_interface, CHECK_NULL);
1161     access_flags.set_flags(flags);
1162 
1163     u2 name_index = cfs->get_u2_fast();
1164     int cp_size = cp->length();
1165     check_property(
1166       valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1167       "Invalid constant pool index %u for field name in class file %s",
1168       name_index, CHECK_NULL);
1169     Symbol*  name = cp->symbol_at(name_index);
1170     verify_legal_field_name(name, CHECK_NULL);
1171 
1172     u2 signature_index = cfs->get_u2_fast();
1173     check_property(
1174       valid_cp_range(signature_index, cp_size) &&
1175         cp->tag_at(signature_index).is_utf8(),
1176       "Invalid constant pool index %u for field signature in class file %s",
1177       signature_index, CHECK_NULL);
1178     Symbol*  sig = cp->symbol_at(signature_index);
1179     verify_legal_field_signature(name, sig, CHECK_NULL);
1180 
1181     u2 constantvalue_index = 0;
1182     bool is_synthetic = false;
1183     u2 generic_signature_index = 0;
1184     bool is_static = access_flags.is_static();
1185     FieldAnnotationCollector parsed_annotations;
1186 
1187     u2 attributes_count = cfs->get_u2_fast();
1188     if (attributes_count > 0) {
1189       parse_field_attributes(loader_data,
1190                              cp, attributes_count, is_static, signature_index,
1191                              &constantvalue_index, &is_synthetic,
1192                              &generic_signature_index, &field_annotations,
1193                              &field_type_annotations, &parsed_annotations,
1194                              CHECK_NULL);
1195       if (field_annotations != NULL) {
1196         if (*fields_annotations == NULL) {
1197           *fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1198                                              loader_data, length, NULL,
1199                                              CHECK_NULL);
1200         }
1201         (*fields_annotations)->at_put(n, field_annotations);
1202       }
1203       if (field_type_annotations != NULL) {
1204         if (*fields_type_annotations == NULL) {
1205           *fields_type_annotations = MetadataFactory::new_array<AnnotationArray*>(
1206                                                   loader_data, length, NULL,
1207                                                   CHECK_NULL);
1208         }
1209         (*fields_type_annotations)->at_put(n, field_type_annotations);
1210       }
1211       if (is_synthetic) {
1212         access_flags.set_is_synthetic();
1213       }
1214       if (generic_signature_index != 0) {
1215         access_flags.set_field_has_generic_signature();
1216         fa[generic_signature_slot] = generic_signature_index;
1217         generic_signature_slot ++;
1218         num_generic_signature ++;
1219       }
1220     }
1221 
1222     FieldInfo* field = FieldInfo::from_field_array(fa, n);
1223     field->initialize(access_flags.as_short(),
1224                       name_index,
1225                       signature_index,
1226                       constantvalue_index);
1227     BasicType type = cp->basic_type_for_signature_at(signature_index);
1228 
1229     // Remember how many oops we encountered and compute allocation type
1230     FieldAllocationType atype = fac->update(is_static, type);
1231     field->set_allocation_type(atype);
1232 
1233     // After field is initialized with type, we can augment it with aux info
1234     if (parsed_annotations.has_any_annotations())
1235       parsed_annotations.apply_to(field);
1236   }
1237 
1238   int index = length;
1239   if (num_injected != 0) {
1240     for (int n = 0; n < num_injected; n++) {
1241       // Check for duplicates
1242       if (injected[n].may_be_java) {
1243         Symbol* name      = injected[n].name();
1244         Symbol* signature = injected[n].signature();
1245         bool duplicate = false;
1246         for (int i = 0; i < length; i++) {
1247           FieldInfo* f = FieldInfo::from_field_array(fa, i);
1248           if (name      == cp->symbol_at(f->name_index()) &&
1249               signature == cp->symbol_at(f->signature_index())) {
1250             // Symbol is desclared in Java so skip this one
1251             duplicate = true;
1252             break;
1253           }
1254         }
1255         if (duplicate) {
1256           // These will be removed from the field array at the end
1257           continue;
1258         }
1259       }
1260 
1261       // Injected field
1262       FieldInfo* field = FieldInfo::from_field_array(fa, index);
1263       field->initialize(JVM_ACC_FIELD_INTERNAL,
1264                         injected[n].name_index,
1265                         injected[n].signature_index,
1266                         0);
1267 
1268       BasicType type = FieldType::basic_type(injected[n].signature());
1269 
1270       // Remember how many oops we encountered and compute allocation type
1271       FieldAllocationType atype = fac->update(false, type);
1272       field->set_allocation_type(atype);
1273       index++;
1274     }
1275   }
1276 
1277   // Now copy the fields' data from the temporary resource array.
1278   // Sometimes injected fields already exist in the Java source so
1279   // the fields array could be too long.  In that case the
1280   // fields array is trimed. Also unused slots that were reserved
1281   // for generic signature indexes are discarded.
1282   Array<u2>* fields = MetadataFactory::new_array<u2>(
1283           loader_data, index * FieldInfo::field_slots + num_generic_signature,
1284           CHECK_NULL);
1285   {
1286     int i = 0;
1287     for (; i < index * FieldInfo::field_slots; i++) {
1288       fields->at_put(i, fa[i]);
1289     }
1290     for (int j = total_fields * FieldInfo::field_slots;
1291          j < generic_signature_slot; j++) {
1292       fields->at_put(i++, fa[j]);
1293     }
1294     assert(i == fields->length(), "");
1295   }
1296 
1297   if (_need_verify && length > 1) {
1298     // Check duplicated fields
1299     ResourceMark rm(THREAD);
1300     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1301       THREAD, NameSigHash*, HASH_ROW_SIZE);
1302     initialize_hashtable(names_and_sigs);
1303     bool dup = false;
1304     {
1305       debug_only(No_Safepoint_Verifier nsv;)
1306       for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
1307         Symbol* name = fs.name();
1308         Symbol* sig = fs.signature();
1309         // If no duplicates, add name/signature in hashtable names_and_sigs.
1310         if (!put_after_lookup(name, sig, names_and_sigs)) {
1311           dup = true;
1312           break;
1313         }
1314       }
1315     }
1316     if (dup) {
1317       classfile_parse_error("Duplicate field name&signature in class file %s",
1318                             CHECK_NULL);
1319     }
1320   }
1321 
1322   return fields;
1323 }
1324 
1325 
1326 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1327   while (length-- > 0) {
1328     *dest++ = Bytes::get_Java_u2((u1*) (src++));
1329   }
1330 }
1331 
1332 
1333 u2* ClassFileParser::parse_exception_table(ClassLoaderData* loader_data,
1334                                            u4 code_length,
1335                                            u4 exception_table_length,
1336                                            constantPoolHandle cp,
1337                                            TRAPS) {
1338   ClassFileStream* cfs = stream();
1339 
1340   u2* exception_table_start = cfs->get_u2_buffer();
1341   assert(exception_table_start != NULL, "null exception table");
1342   cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
1343   // Will check legal target after parsing code array in verifier.
1344   if (_need_verify) {
1345     for (unsigned int i = 0; i < exception_table_length; i++) {
1346       u2 start_pc = cfs->get_u2_fast();
1347       u2 end_pc = cfs->get_u2_fast();
1348       u2 handler_pc = cfs->get_u2_fast();
1349       u2 catch_type_index = cfs->get_u2_fast();
1350       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1351                          "Illegal exception table range in class file %s",
1352                          CHECK_NULL);
1353       guarantee_property(handler_pc < code_length,
1354                          "Illegal exception table handler in class file %s",
1355                          CHECK_NULL);
1356       if (catch_type_index != 0) {
1357         guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1358                            is_klass_reference(cp, catch_type_index),
1359                            "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1360       }
1361     }
1362   } else {
1363     cfs->skip_u2_fast(exception_table_length * 4);
1364   }
1365   return exception_table_start;
1366 }
1367 
1368 void ClassFileParser::parse_linenumber_table(
1369     u4 code_attribute_length, u4 code_length,
1370     CompressedLineNumberWriteStream** write_stream, TRAPS) {
1371   ClassFileStream* cfs = stream();
1372   unsigned int num_entries = cfs->get_u2(CHECK);
1373 
1374   // Each entry is a u2 start_pc, and a u2 line_number
1375   unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1376 
1377   // Verify line number attribute and table length
1378   check_property(
1379     code_attribute_length == sizeof(u2) + length_in_bytes,
1380     "LineNumberTable attribute has wrong length in class file %s", CHECK);
1381 
1382   cfs->guarantee_more(length_in_bytes, CHECK);
1383 
1384   if ((*write_stream) == NULL) {
1385     if (length_in_bytes > fixed_buffer_size) {
1386       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1387     } else {
1388       (*write_stream) = new CompressedLineNumberWriteStream(
1389         linenumbertable_buffer, fixed_buffer_size);
1390     }
1391   }
1392 
1393   while (num_entries-- > 0) {
1394     u2 bci  = cfs->get_u2_fast(); // start_pc
1395     u2 line = cfs->get_u2_fast(); // line_number
1396     guarantee_property(bci < code_length,
1397         "Invalid pc in LineNumberTable in class file %s", CHECK);
1398     (*write_stream)->write_pair(bci, line);
1399   }
1400 }
1401 
1402 
1403 // Class file LocalVariableTable elements.
1404 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1405  public:
1406   u2 start_bci;
1407   u2 length;
1408   u2 name_cp_index;
1409   u2 descriptor_cp_index;
1410   u2 slot;
1411 };
1412 
1413 
1414 class LVT_Hash: public CHeapObj<mtClass> {
1415  public:
1416   LocalVariableTableElement  *_elem;  // element
1417   LVT_Hash*                   _next;  // Next entry in hash table
1418 };
1419 
1420 unsigned int hash(LocalVariableTableElement *elem) {
1421   unsigned int raw_hash = elem->start_bci;
1422 
1423   raw_hash = elem->length        + raw_hash * 37;
1424   raw_hash = elem->name_cp_index + raw_hash * 37;
1425   raw_hash = elem->slot          + raw_hash * 37;
1426 
1427   return raw_hash % HASH_ROW_SIZE;
1428 }
1429 
1430 void initialize_hashtable(LVT_Hash** table) {
1431   for (int i = 0; i < HASH_ROW_SIZE; i++) {
1432     table[i] = NULL;
1433   }
1434 }
1435 
1436 void clear_hashtable(LVT_Hash** table) {
1437   for (int i = 0; i < HASH_ROW_SIZE; i++) {
1438     LVT_Hash* current = table[i];
1439     LVT_Hash* next;
1440     while (current != NULL) {
1441       next = current->_next;
1442       current->_next = NULL;
1443       delete(current);
1444       current = next;
1445     }
1446     table[i] = NULL;
1447   }
1448 }
1449 
1450 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1451   LVT_Hash* entry = table[index];
1452 
1453   /*
1454    * 3-tuple start_bci/length/slot has to be unique key,
1455    * so the following comparison seems to be redundant:
1456    *       && elem->name_cp_index == entry->_elem->name_cp_index
1457    */
1458   while (entry != NULL) {
1459     if (elem->start_bci           == entry->_elem->start_bci
1460      && elem->length              == entry->_elem->length
1461      && elem->name_cp_index       == entry->_elem->name_cp_index
1462      && elem->slot                == entry->_elem->slot
1463     ) {
1464       return entry;
1465     }
1466     entry = entry->_next;
1467   }
1468   return NULL;
1469 }
1470 
1471 // Return false if the local variable is found in table.
1472 // Return true if no duplicate is found.
1473 // And local variable is added as a new entry in table.
1474 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1475   // First lookup for duplicates
1476   int index = hash(elem);
1477   LVT_Hash* entry = LVT_lookup(elem, index, table);
1478 
1479   if (entry != NULL) {
1480       return false;
1481   }
1482   // No duplicate is found, allocate a new entry and fill it.
1483   if ((entry = new LVT_Hash()) == NULL) {
1484     return false;
1485   }
1486   entry->_elem = elem;
1487 
1488   // Insert into hash table
1489   entry->_next = table[index];
1490   table[index] = entry;
1491 
1492   return true;
1493 }
1494 
1495 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1496   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
1497   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
1498   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1499   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1500   lvt->signature_cp_index  = 0;
1501   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
1502 }
1503 
1504 // Function is used to parse both attributes:
1505 //       LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1506 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1507                                                u2 max_locals,
1508                                                u4 code_attribute_length,
1509                                                constantPoolHandle cp,
1510                                                u2* localvariable_table_length,
1511                                                bool isLVTT,
1512                                                TRAPS) {
1513   ClassFileStream* cfs = stream();
1514   const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1515   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1516   unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1517   // Verify local variable table attribute has right length
1518   if (_need_verify) {
1519     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1520                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1521   }
1522   u2* localvariable_table_start = cfs->get_u2_buffer();
1523   assert(localvariable_table_start != NULL, "null local variable table");
1524   if (!_need_verify) {
1525     cfs->skip_u2_fast(size);
1526   } else {
1527     cfs->guarantee_more(size * 2, CHECK_NULL);
1528     for(int i = 0; i < (*localvariable_table_length); i++) {
1529       u2 start_pc = cfs->get_u2_fast();
1530       u2 length = cfs->get_u2_fast();
1531       u2 name_index = cfs->get_u2_fast();
1532       u2 descriptor_index = cfs->get_u2_fast();
1533       u2 index = cfs->get_u2_fast();
1534       // Assign to a u4 to avoid overflow
1535       u4 end_pc = (u4)start_pc + (u4)length;
1536 
1537       if (start_pc >= code_length) {
1538         classfile_parse_error(
1539           "Invalid start_pc %u in %s in class file %s",
1540           start_pc, tbl_name, CHECK_NULL);
1541       }
1542       if (end_pc > code_length) {
1543         classfile_parse_error(
1544           "Invalid length %u in %s in class file %s",
1545           length, tbl_name, CHECK_NULL);
1546       }
1547       int cp_size = cp->length();
1548       guarantee_property(
1549         valid_cp_range(name_index, cp_size) &&
1550           cp->tag_at(name_index).is_utf8(),
1551         "Name index %u in %s has bad constant type in class file %s",
1552         name_index, tbl_name, CHECK_NULL);
1553       guarantee_property(
1554         valid_cp_range(descriptor_index, cp_size) &&
1555           cp->tag_at(descriptor_index).is_utf8(),
1556         "Signature index %u in %s has bad constant type in class file %s",
1557         descriptor_index, tbl_name, CHECK_NULL);
1558 
1559       Symbol*  name = cp->symbol_at(name_index);
1560       Symbol*  sig = cp->symbol_at(descriptor_index);
1561       verify_legal_field_name(name, CHECK_NULL);
1562       u2 extra_slot = 0;
1563       if (!isLVTT) {
1564         verify_legal_field_signature(name, sig, CHECK_NULL);
1565 
1566         // 4894874: check special cases for double and long local variables
1567         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1568             sig == vmSymbols::type_signature(T_LONG)) {
1569           extra_slot = 1;
1570         }
1571       }
1572       guarantee_property((index + extra_slot) < max_locals,
1573                           "Invalid index %u in %s in class file %s",
1574                           index, tbl_name, CHECK_NULL);
1575     }
1576   }
1577   return localvariable_table_start;
1578 }
1579 
1580 
1581 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1582                                       u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1583   ClassFileStream* cfs = stream();
1584   u2 index = 0; // index in the array with long/double occupying two slots
1585   u4 i1 = *u1_index;
1586   u4 i2 = *u2_index + 1;
1587   for(int i = 0; i < array_length; i++) {
1588     u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1589     index++;
1590     if (tag == ITEM_Long || tag == ITEM_Double) {
1591       index++;
1592     } else if (tag == ITEM_Object) {
1593       u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1594       guarantee_property(valid_cp_range(class_index, cp->length()) &&
1595                          is_klass_reference(cp, class_index),
1596                          "Bad class index %u in StackMap in class file %s",
1597                          class_index, CHECK);
1598     } else if (tag == ITEM_Uninitialized) {
1599       u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1600       guarantee_property(
1601         offset < code_length,
1602         "Bad uninitialized type offset %u in StackMap in class file %s",
1603         offset, CHECK);
1604     } else {
1605       guarantee_property(
1606         tag <= (u1)ITEM_Uninitialized,
1607         "Unknown variable type %u in StackMap in class file %s",
1608         tag, CHECK);
1609     }
1610   }
1611   u2_array[*u2_index] = index;
1612   *u1_index = i1;
1613   *u2_index = i2;
1614 }
1615 
1616 Array<u1>* ClassFileParser::parse_stackmap_table(
1617     ClassLoaderData* loader_data,
1618     u4 code_attribute_length, TRAPS) {
1619   if (code_attribute_length == 0)
1620     return NULL;
1621 
1622   ClassFileStream* cfs = stream();
1623   u1* stackmap_table_start = cfs->get_u1_buffer();
1624   assert(stackmap_table_start != NULL, "null stackmap table");
1625 
1626   // check code_attribute_length first
1627   stream()->skip_u1(code_attribute_length, CHECK_NULL);
1628 
1629   if (!_need_verify && !DumpSharedSpaces) {
1630     return NULL;
1631   }
1632 
1633   Array<u1>* stackmap_data =
1634     MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL);
1635 
1636   memcpy((void*)stackmap_data->adr_at(0),
1637          (void*)stackmap_table_start, code_attribute_length);
1638   return stackmap_data;
1639 }
1640 
1641 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1642                                               u4 method_attribute_length,
1643                                               constantPoolHandle cp, TRAPS) {
1644   ClassFileStream* cfs = stream();
1645   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
1646   *checked_exceptions_length = cfs->get_u2_fast();
1647   unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1648   u2* checked_exceptions_start = cfs->get_u2_buffer();
1649   assert(checked_exceptions_start != NULL, "null checked exceptions");
1650   if (!_need_verify) {
1651     cfs->skip_u2_fast(size);
1652   } else {
1653     // Verify each value in the checked exception table
1654     u2 checked_exception;
1655     u2 len = *checked_exceptions_length;
1656     cfs->guarantee_more(2 * len, CHECK_NULL);
1657     for (int i = 0; i < len; i++) {
1658       checked_exception = cfs->get_u2_fast();
1659       check_property(
1660         valid_cp_range(checked_exception, cp->length()) &&
1661         is_klass_reference(cp, checked_exception),
1662         "Exception name has bad type at constant pool %u in class file %s",
1663         checked_exception, CHECK_NULL);
1664     }
1665   }
1666   // check exceptions attribute length
1667   if (_need_verify) {
1668     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1669                                                    sizeof(u2) * size),
1670                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1671   }
1672   return checked_exceptions_start;
1673 }
1674 
1675 void ClassFileParser::throwIllegalSignature(
1676     const char* type, Symbol* name, Symbol* sig, TRAPS) {
1677   ResourceMark rm(THREAD);
1678   Exceptions::fthrow(THREAD_AND_LOCATION,
1679       vmSymbols::java_lang_ClassFormatError(),
1680       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1681       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1682 }
1683 
1684 // Skip an annotation.  Return >=limit if there is any problem.
1685 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
1686   // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1687   // value := switch (tag:u1) { ... }
1688   index += 2;  // skip atype
1689   if ((index += 2) >= limit)  return limit;  // read nmem
1690   int nmem = Bytes::get_Java_u2(buffer+index-2);
1691   while (--nmem >= 0 && index < limit) {
1692     index += 2; // skip member
1693     index = skip_annotation_value(buffer, limit, index);
1694   }
1695   return index;
1696 }
1697 
1698 // Skip an annotation value.  Return >=limit if there is any problem.
1699 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
1700   // value := switch (tag:u1) {
1701   //   case B, C, I, S, Z, D, F, J, c: con:u2;
1702   //   case e: e_class:u2 e_name:u2;
1703   //   case s: s_con:u2;
1704   //   case [: do(nval:u2) {value};
1705   //   case @: annotation;
1706   //   case s: s_con:u2;
1707   // }
1708   if ((index += 1) >= limit)  return limit;  // read tag
1709   u1 tag = buffer[index-1];
1710   switch (tag) {
1711   case 'B': case 'C': case 'I': case 'S': case 'Z':
1712   case 'D': case 'F': case 'J': case 'c': case 's':
1713     index += 2;  // skip con or s_con
1714     break;
1715   case 'e':
1716     index += 4;  // skip e_class, e_name
1717     break;
1718   case '[':
1719     {
1720       if ((index += 2) >= limit)  return limit;  // read nval
1721       int nval = Bytes::get_Java_u2(buffer+index-2);
1722       while (--nval >= 0 && index < limit) {
1723         index = skip_annotation_value(buffer, limit, index);
1724       }
1725     }
1726     break;
1727   case '@':
1728     index = skip_annotation(buffer, limit, index);
1729     break;
1730   default:
1731     assert(false, "annotation tag");
1732     return limit;  //  bad tag byte
1733   }
1734   return index;
1735 }
1736 
1737 // Sift through annotations, looking for those significant to the VM:
1738 void ClassFileParser::parse_annotations(ClassLoaderData* loader_data,
1739                                         u1* buffer, int limit,
1740                                         constantPoolHandle cp,
1741                                         ClassFileParser::AnnotationCollector* coll,
1742                                         TRAPS) {
1743   // annotations := do(nann:u2) {annotation}
1744   int index = 0;
1745   if ((index += 2) >= limit)  return;  // read nann
1746   int nann = Bytes::get_Java_u2(buffer+index-2);
1747   enum {  // initial annotation layout
1748     atype_off = 0,      // utf8 such as 'Ljava/lang/annotation/Retention;'
1749     count_off = 2,      // u2   such as 1 (one value)
1750     member_off = 4,     // utf8 such as 'value'
1751     tag_off = 6,        // u1   such as 'c' (type) or 'e' (enum)
1752     e_tag_val = 'e',
1753       e_type_off = 7,   // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1754       e_con_off = 9,    // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1755       e_size = 11,     // end of 'e' annotation
1756     c_tag_val = 'c',    // payload is type
1757       c_con_off = 7,    // utf8 payload, such as 'I'
1758       c_size = 9,       // end of 'c' annotation
1759     s_tag_val = 's',    // payload is String
1760       s_con_off = 7,    // utf8 payload, such as 'Ljava/lang/String;'
1761       s_size = 9,
1762     min_size = 6        // smallest possible size (zero members)
1763   };
1764   while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
1765     int index0 = index;
1766     index = skip_annotation(buffer, limit, index);
1767     u1* abase = buffer + index0;
1768     int atype = Bytes::get_Java_u2(abase + atype_off);
1769     int count = Bytes::get_Java_u2(abase + count_off);
1770     Symbol* aname = check_symbol_at(cp, atype);
1771     if (aname == NULL)  break;  // invalid annotation name
1772     Symbol* member = NULL;
1773     if (count >= 1) {
1774       int member_index = Bytes::get_Java_u2(abase + member_off);
1775       member = check_symbol_at(cp, member_index);
1776       if (member == NULL)  break;  // invalid member name
1777     }
1778 
1779     // Here is where parsing particular annotations will take place.
1780     AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1781     if (id == AnnotationCollector::_unknown)  continue;
1782     coll->set_annotation(id);
1783 
1784     if (id == AnnotationCollector::_sun_misc_Contended) {
1785       if (count == 1
1786           && s_size == (index - index0)  // match size
1787           && s_tag_val == *(abase + tag_off)
1788           && member == vmSymbols::value_name()) {
1789         u2 group_index = Bytes::get_Java_u2(abase + s_con_off);
1790         coll->set_contended_group(group_index);
1791       } else {
1792         coll->set_contended_group(0); // default contended group
1793       }
1794       coll->set_contended(true);
1795     } else {
1796       coll->set_contended(false);
1797     }
1798   }
1799 }
1800 
1801 ClassFileParser::AnnotationCollector::ID
1802 ClassFileParser::AnnotationCollector::annotation_index(ClassLoaderData* loader_data,
1803                                                                 Symbol* name) {
1804   vmSymbols::SID sid = vmSymbols::find_sid(name);
1805   bool privileged = false;
1806   if (loader_data->is_the_null_class_loader_data()) {
1807     // Privileged code can use all annotations.  Other code silently drops some.
1808     privileged = true;
1809   }
1810   switch (sid) {
1811   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
1812     if (_location != _in_method)  break;  // only allow for methods
1813     if (!privileged)              break;  // only allow in privileged code
1814     return _method_ForceInline;
1815   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
1816     if (_location != _in_method)  break;  // only allow for methods
1817     if (!privileged)              break;  // only allow in privileged code
1818     return _method_DontInline;
1819   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
1820     if (_location != _in_method)  break;  // only allow for methods
1821     if (!privileged)              break;  // only allow in privileged code
1822     return _method_LambdaForm_Compiled;
1823   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
1824     if (_location != _in_method)  break;  // only allow for methods
1825     if (!privileged)              break;  // only allow in privileged code
1826     return _method_LambdaForm_Hidden;
1827   case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_misc_Contended_signature):
1828     if (_location != _in_field && _location != _in_class)          break;  // only allow for fields and classes
1829     if (!EnableContended || (RestrictContended && !privileged))    break;  // honor privileges
1830     return _sun_misc_Contended;
1831   default: break;
1832   }
1833   return AnnotationCollector::_unknown;
1834 }
1835 
1836 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
1837   if (is_contended())
1838     f->set_contended_group(contended_group());
1839 }
1840 
1841 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
1842   if (has_annotation(_method_ForceInline))
1843     m->set_force_inline(true);
1844   if (has_annotation(_method_DontInline))
1845     m->set_dont_inline(true);
1846   if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
1847     m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
1848   if (has_annotation(_method_LambdaForm_Hidden))
1849     m->set_hidden(true);
1850 }
1851 
1852 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
1853   k->set_is_contended(is_contended());
1854 }
1855 
1856 
1857 #define MAX_ARGS_SIZE 255
1858 #define MAX_CODE_SIZE 65535
1859 #define INITIAL_MAX_LVT_NUMBER 256
1860 
1861 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1862 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
1863 // Method* to save footprint, so we only know the size of the resulting Method* when the
1864 // entire method attribute is parsed.
1865 //
1866 // The promoted_flags parameter is used to pass relevant access_flags
1867 // from the method back up to the containing klass. These flag values
1868 // are added to klass's access_flags.
1869 
1870 methodHandle ClassFileParser::parse_method(ClassLoaderData* loader_data,
1871                                            constantPoolHandle cp,
1872                                            bool is_interface,
1873                                            AccessFlags *promoted_flags,
1874                                            AnnotationArray** method_annotations,
1875                                            AnnotationArray** method_parameter_annotations,
1876                                            AnnotationArray** method_default_annotations,
1877                                            AnnotationArray** method_type_annotations,
1878                                            TRAPS) {
1879   ClassFileStream* cfs = stream();
1880   methodHandle nullHandle;
1881   ResourceMark rm(THREAD);
1882   // Parse fixed parts
1883   cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1884 
1885   int flags = cfs->get_u2_fast();
1886   u2 name_index = cfs->get_u2_fast();
1887   int cp_size = cp->length();
1888   check_property(
1889     valid_cp_range(name_index, cp_size) &&
1890       cp->tag_at(name_index).is_utf8(),
1891     "Illegal constant pool index %u for method name in class file %s",
1892     name_index, CHECK_(nullHandle));
1893   Symbol*  name = cp->symbol_at(name_index);
1894   verify_legal_method_name(name, CHECK_(nullHandle));
1895 
1896   u2 signature_index = cfs->get_u2_fast();
1897   guarantee_property(
1898     valid_cp_range(signature_index, cp_size) &&
1899       cp->tag_at(signature_index).is_utf8(),
1900     "Illegal constant pool index %u for method signature in class file %s",
1901     signature_index, CHECK_(nullHandle));
1902   Symbol*  signature = cp->symbol_at(signature_index);
1903 
1904   AccessFlags access_flags;
1905   if (name == vmSymbols::class_initializer_name()) {
1906     // We ignore the other access flags for a valid class initializer.
1907     // (JVM Spec 2nd ed., chapter 4.6)
1908     if (_major_version < 51) { // backward compatibility
1909       flags = JVM_ACC_STATIC;
1910     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1911       flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1912     }
1913   } else {
1914     verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1915   }
1916 
1917   int args_size = -1;  // only used when _need_verify is true
1918   if (_need_verify) {
1919     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1920                  verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1921     if (args_size > MAX_ARGS_SIZE) {
1922       classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1923     }
1924   }
1925 
1926   access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1927 
1928   // Default values for code and exceptions attribute elements
1929   u2 max_stack = 0;
1930   u2 max_locals = 0;
1931   u4 code_length = 0;
1932   u1* code_start = 0;
1933   u2 exception_table_length = 0;
1934   u2* exception_table_start = NULL;
1935   Array<int>* exception_handlers = Universe::the_empty_int_array();
1936   u2 checked_exceptions_length = 0;
1937   u2* checked_exceptions_start = NULL;
1938   CompressedLineNumberWriteStream* linenumber_table = NULL;
1939   int linenumber_table_length = 0;
1940   int total_lvt_length = 0;
1941   u2 lvt_cnt = 0;
1942   u2 lvtt_cnt = 0;
1943   bool lvt_allocated = false;
1944   u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1945   u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1946   u2* localvariable_table_length;
1947   u2** localvariable_table_start;
1948   u2* localvariable_type_table_length;
1949   u2** localvariable_type_table_start;
1950   u2 method_parameters_length = 0;
1951   u1* method_parameters_data = NULL;
1952   bool parsed_code_attribute = false;
1953   bool parsed_checked_exceptions_attribute = false;
1954   bool parsed_stackmap_attribute = false;
1955   // stackmap attribute - JDK1.5
1956   Array<u1>* stackmap_data = NULL;
1957   u2 generic_signature_index = 0;
1958   MethodAnnotationCollector parsed_annotations;
1959   u1* runtime_visible_annotations = NULL;
1960   int runtime_visible_annotations_length = 0;
1961   u1* runtime_invisible_annotations = NULL;
1962   int runtime_invisible_annotations_length = 0;
1963   u1* runtime_visible_parameter_annotations = NULL;
1964   int runtime_visible_parameter_annotations_length = 0;
1965   u1* runtime_invisible_parameter_annotations = NULL;
1966   int runtime_invisible_parameter_annotations_length = 0;
1967   u1* runtime_visible_type_annotations = NULL;
1968   int runtime_visible_type_annotations_length = 0;
1969   u1* runtime_invisible_type_annotations = NULL;
1970   int runtime_invisible_type_annotations_length = 0;
1971   u1* annotation_default = NULL;
1972   int annotation_default_length = 0;
1973 
1974   // Parse code and exceptions attribute
1975   u2 method_attributes_count = cfs->get_u2_fast();
1976   while (method_attributes_count--) {
1977     cfs->guarantee_more(6, CHECK_(nullHandle));  // method_attribute_name_index, method_attribute_length
1978     u2 method_attribute_name_index = cfs->get_u2_fast();
1979     u4 method_attribute_length = cfs->get_u4_fast();
1980     check_property(
1981       valid_cp_range(method_attribute_name_index, cp_size) &&
1982         cp->tag_at(method_attribute_name_index).is_utf8(),
1983       "Invalid method attribute name index %u in class file %s",
1984       method_attribute_name_index, CHECK_(nullHandle));
1985 
1986     Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1987     if (method_attribute_name == vmSymbols::tag_code()) {
1988       // Parse Code attribute
1989       if (_need_verify) {
1990         guarantee_property(
1991             !access_flags.is_native() && !access_flags.is_abstract(),
1992                         "Code attribute in native or abstract methods in class file %s",
1993                          CHECK_(nullHandle));
1994       }
1995       if (parsed_code_attribute) {
1996         classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1997       }
1998       parsed_code_attribute = true;
1999 
2000       // Stack size, locals size, and code size
2001       if (_major_version == 45 && _minor_version <= 2) {
2002         cfs->guarantee_more(4, CHECK_(nullHandle));
2003         max_stack = cfs->get_u1_fast();
2004         max_locals = cfs->get_u1_fast();
2005         code_length = cfs->get_u2_fast();
2006       } else {
2007         cfs->guarantee_more(8, CHECK_(nullHandle));
2008         max_stack = cfs->get_u2_fast();
2009         max_locals = cfs->get_u2_fast();
2010         code_length = cfs->get_u4_fast();
2011       }
2012       if (_need_verify) {
2013         guarantee_property(args_size <= max_locals,
2014                            "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
2015         guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2016                            "Invalid method Code length %u in class file %s",
2017                            code_length, CHECK_(nullHandle));
2018       }
2019       // Code pointer
2020       code_start = cfs->get_u1_buffer();
2021       assert(code_start != NULL, "null code start");
2022       cfs->guarantee_more(code_length, CHECK_(nullHandle));
2023       cfs->skip_u1_fast(code_length);
2024 
2025       // Exception handler table
2026       cfs->guarantee_more(2, CHECK_(nullHandle));  // exception_table_length
2027       exception_table_length = cfs->get_u2_fast();
2028       if (exception_table_length > 0) {
2029         exception_table_start =
2030               parse_exception_table(loader_data, code_length, exception_table_length, cp, CHECK_(nullHandle));
2031       }
2032 
2033       // Parse additional attributes in code attribute
2034       cfs->guarantee_more(2, CHECK_(nullHandle));  // code_attributes_count
2035       u2 code_attributes_count = cfs->get_u2_fast();
2036 
2037       unsigned int calculated_attribute_length = 0;
2038 
2039       if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2040         calculated_attribute_length =
2041             sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2042       } else {
2043         // max_stack, locals and length are smaller in pre-version 45.2 classes
2044         calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2045       }
2046       calculated_attribute_length +=
2047         code_length +
2048         sizeof(exception_table_length) +
2049         sizeof(code_attributes_count) +
2050         exception_table_length *
2051             ( sizeof(u2) +   // start_pc
2052               sizeof(u2) +   // end_pc
2053               sizeof(u2) +   // handler_pc
2054               sizeof(u2) );  // catch_type_index
2055 
2056       while (code_attributes_count--) {
2057         cfs->guarantee_more(6, CHECK_(nullHandle));  // code_attribute_name_index, code_attribute_length
2058         u2 code_attribute_name_index = cfs->get_u2_fast();
2059         u4 code_attribute_length = cfs->get_u4_fast();
2060         calculated_attribute_length += code_attribute_length +
2061                                        sizeof(code_attribute_name_index) +
2062                                        sizeof(code_attribute_length);
2063         check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
2064                        cp->tag_at(code_attribute_name_index).is_utf8(),
2065                        "Invalid code attribute name index %u in class file %s",
2066                        code_attribute_name_index,
2067                        CHECK_(nullHandle));
2068         if (LoadLineNumberTables &&
2069             cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2070           // Parse and compress line number table
2071           parse_linenumber_table(code_attribute_length, code_length,
2072             &linenumber_table, CHECK_(nullHandle));
2073 
2074         } else if (LoadLocalVariableTables &&
2075                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2076           // Parse local variable table
2077           if (!lvt_allocated) {
2078             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2079               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2080             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2081               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2082             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2083               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2084             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2085               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2086             lvt_allocated = true;
2087           }
2088           if (lvt_cnt == max_lvt_cnt) {
2089             max_lvt_cnt <<= 1;
2090             REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2091             REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2092           }
2093           localvariable_table_start[lvt_cnt] =
2094             parse_localvariable_table(code_length,
2095                                       max_locals,
2096                                       code_attribute_length,
2097                                       cp,
2098                                       &localvariable_table_length[lvt_cnt],
2099                                       false,    // is not LVTT
2100                                       CHECK_(nullHandle));
2101           total_lvt_length += localvariable_table_length[lvt_cnt];
2102           lvt_cnt++;
2103         } else if (LoadLocalVariableTypeTables &&
2104                    _major_version >= JAVA_1_5_VERSION &&
2105                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2106           if (!lvt_allocated) {
2107             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2108               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2109             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2110               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2111             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2112               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2113             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2114               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
2115             lvt_allocated = true;
2116           }
2117           // Parse local variable type table
2118           if (lvtt_cnt == max_lvtt_cnt) {
2119             max_lvtt_cnt <<= 1;
2120             REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2121             REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2122           }
2123           localvariable_type_table_start[lvtt_cnt] =
2124             parse_localvariable_table(code_length,
2125                                       max_locals,
2126                                       code_attribute_length,
2127                                       cp,
2128                                       &localvariable_type_table_length[lvtt_cnt],
2129                                       true,     // is LVTT
2130                                       CHECK_(nullHandle));
2131           lvtt_cnt++;
2132         } else if (UseSplitVerifier &&
2133                    _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2134                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2135           // Stack map is only needed by the new verifier in JDK1.5.
2136           if (parsed_stackmap_attribute) {
2137             classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
2138           }
2139           stackmap_data = parse_stackmap_table(loader_data, code_attribute_length, CHECK_(nullHandle));
2140           parsed_stackmap_attribute = true;
2141         } else {
2142           // Skip unknown attributes
2143           cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
2144         }
2145       }
2146       // check method attribute length
2147       if (_need_verify) {
2148         guarantee_property(method_attribute_length == calculated_attribute_length,
2149                            "Code segment has wrong length in class file %s", CHECK_(nullHandle));
2150       }
2151     } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2152       // Parse Exceptions attribute
2153       if (parsed_checked_exceptions_attribute) {
2154         classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
2155       }
2156       parsed_checked_exceptions_attribute = true;
2157       checked_exceptions_start =
2158             parse_checked_exceptions(&checked_exceptions_length,
2159                                      method_attribute_length,
2160                                      cp, CHECK_(nullHandle));
2161     } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2162       method_parameters_length = cfs->get_u1_fast();
2163       // Track the actual size (note: this is written for clarity; a
2164       // decent compiler will CSE and constant-fold this into a single
2165       // expression)
2166       u2 actual_size = 1;
2167       method_parameters_data = cfs->get_u1_buffer();
2168       actual_size += 2 * method_parameters_length;
2169       cfs->skip_u2_fast(method_parameters_length);
2170       actual_size += 4 * method_parameters_length;
2171       cfs->skip_u4_fast(method_parameters_length);
2172       // Enforce attribute length
2173       if (method_attribute_length != actual_size) {
2174         classfile_parse_error(
2175           "Invalid MethodParameters method attribute length %u in class file %s",
2176           method_attribute_length, CHECK_(nullHandle));
2177       }
2178       // ignore this attribute if it cannot be reflected
2179       if (!SystemDictionary::Parameter_klass_loaded())
2180         method_parameters_length = 0;
2181     } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2182       if (method_attribute_length != 0) {
2183         classfile_parse_error(
2184           "Invalid Synthetic method attribute length %u in class file %s",
2185           method_attribute_length, CHECK_(nullHandle));
2186       }
2187       // Should we check that there hasn't already been a synthetic attribute?
2188       access_flags.set_is_synthetic();
2189     } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2190       if (method_attribute_length != 0) {
2191         classfile_parse_error(
2192           "Invalid Deprecated method attribute length %u in class file %s",
2193           method_attribute_length, CHECK_(nullHandle));
2194       }
2195     } else if (_major_version >= JAVA_1_5_VERSION) {
2196       if (method_attribute_name == vmSymbols::tag_signature()) {
2197         if (method_attribute_length != 2) {
2198           classfile_parse_error(
2199             "Invalid Signature attribute length %u in class file %s",
2200             method_attribute_length, CHECK_(nullHandle));
2201         }
2202         cfs->guarantee_more(2, CHECK_(nullHandle));  // generic_signature_index
2203         generic_signature_index = cfs->get_u2_fast();
2204       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2205         runtime_visible_annotations_length = method_attribute_length;
2206         runtime_visible_annotations = cfs->get_u1_buffer();
2207         assert(runtime_visible_annotations != NULL, "null visible annotations");
2208         parse_annotations(loader_data,
2209             runtime_visible_annotations,
2210             runtime_visible_annotations_length, cp, &parsed_annotations,
2211             CHECK_(nullHandle));
2212         cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
2213       } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2214         runtime_invisible_annotations_length = method_attribute_length;
2215         runtime_invisible_annotations = cfs->get_u1_buffer();
2216         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2217         cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
2218       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2219         runtime_visible_parameter_annotations_length = method_attribute_length;
2220         runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2221         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2222         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
2223       } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2224         runtime_invisible_parameter_annotations_length = method_attribute_length;
2225         runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2226         assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
2227         cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
2228       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2229         annotation_default_length = method_attribute_length;
2230         annotation_default = cfs->get_u1_buffer();
2231         assert(annotation_default != NULL, "null annotation default");
2232         cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
2233       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2234         runtime_visible_type_annotations_length = method_attribute_length;
2235         runtime_visible_type_annotations = cfs->get_u1_buffer();
2236         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2237         // No need for the VM to parse Type annotations
2238         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_(nullHandle));
2239       } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2240         runtime_invisible_type_annotations_length = method_attribute_length;
2241         runtime_invisible_type_annotations = cfs->get_u1_buffer();
2242         assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2243         cfs->skip_u1(runtime_invisible_type_annotations_length, CHECK_(nullHandle));
2244       } else {
2245         // Skip unknown attributes
2246         cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2247       }
2248     } else {
2249       // Skip unknown attributes
2250       cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
2251     }
2252   }
2253 
2254   if (linenumber_table != NULL) {
2255     linenumber_table->write_terminator();
2256     linenumber_table_length = linenumber_table->position();
2257   }
2258 
2259   // Make sure there's at least one Code attribute in non-native/non-abstract method
2260   if (_need_verify) {
2261     guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2262                       "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2263   }
2264 
2265   // All sizing information for a Method* is finally available, now create it
2266   Method* m = Method::allocate(
2267       loader_data, code_length, access_flags, linenumber_table_length,
2268       total_lvt_length, exception_table_length, checked_exceptions_length,
2269       method_parameters_length, generic_signature_index,
2270       ConstMethod::NORMAL, CHECK_(nullHandle));
2271 
2272   ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
2273 
2274   // Fill in information from fixed part (access_flags already set)
2275   m->set_constants(cp());
2276   m->set_name_index(name_index);
2277   m->set_signature_index(signature_index);
2278 #ifdef CC_INTERP
2279   // hmm is there a gc issue here??
2280   ResultTypeFinder rtf(cp->symbol_at(signature_index));
2281   m->set_result_index(rtf.type());
2282 #endif
2283 
2284   if (args_size >= 0) {
2285     m->set_size_of_parameters(args_size);
2286   } else {
2287     m->compute_size_of_parameters(THREAD);
2288   }
2289 #ifdef ASSERT
2290   if (args_size >= 0) {
2291     m->compute_size_of_parameters(THREAD);
2292     assert(args_size == m->size_of_parameters(), "");
2293   }
2294 #endif
2295 
2296   // Fill in code attribute information
2297   m->set_max_stack(max_stack);
2298   m->set_max_locals(max_locals);
2299   m->constMethod()->set_stackmap_data(stackmap_data);
2300 
2301   // Copy byte codes
2302   m->set_code(code_start);
2303 
2304   // Copy line number table
2305   if (linenumber_table != NULL) {
2306     memcpy(m->compressed_linenumber_table(),
2307            linenumber_table->buffer(), linenumber_table_length);
2308   }
2309 
2310   // Copy exception table
2311   if (exception_table_length > 0) {
2312     int size =
2313       exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2314     copy_u2_with_conversion((u2*) m->exception_table_start(),
2315                              exception_table_start, size);
2316   }
2317 
2318   // Copy method parameters
2319   if (method_parameters_length > 0) {
2320     MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2321     for(int i = 0; i < method_parameters_length; i++) {
2322       elem[i].name_cp_index =
2323         Bytes::get_Java_u2(method_parameters_data);
2324       method_parameters_data += 2;
2325       u4 flags = Bytes::get_Java_u4(method_parameters_data);
2326       // This caused an alignment fault on Sparc, if flags was a u4
2327       elem[i].flags_lo = extract_low_short_from_int(flags);
2328       elem[i].flags_hi = extract_high_short_from_int(flags);
2329       method_parameters_data += 4;
2330     }
2331   }
2332 
2333   // Copy checked exceptions
2334   if (checked_exceptions_length > 0) {
2335     int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2336     copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2337   }
2338 
2339   /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2340    *
2341    * Rules for LVT's and LVTT's are:
2342    *   - There can be any number of LVT's and LVTT's.
2343    *   - If there are n LVT's, it is the same as if there was just
2344    *     one LVT containing all the entries from the n LVT's.
2345    *   - There may be no more than one LVT entry per local variable.
2346    *     Two LVT entries are 'equal' if these fields are the same:
2347    *        start_pc, length, name, slot
2348    *   - There may be no more than one LVTT entry per each LVT entry.
2349    *     Each LVTT entry has to match some LVT entry.
2350    *   - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2351    */
2352   if (total_lvt_length > 0) {
2353     int tbl_no, idx;
2354 
2355     promoted_flags->set_has_localvariable_table();
2356 
2357     LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2358     initialize_hashtable(lvt_Hash);
2359 
2360     // To fill LocalVariableTable in
2361     Classfile_LVT_Element*  cf_lvt;
2362     LocalVariableTableElement* lvt = m->localvariable_table_start();
2363 
2364     for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2365       cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2366       for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2367         copy_lvt_element(&cf_lvt[idx], lvt);
2368         // If no duplicates, add LVT elem in hashtable lvt_Hash.
2369         if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2370           && _need_verify
2371           && _major_version >= JAVA_1_5_VERSION ) {
2372           clear_hashtable(lvt_Hash);
2373           classfile_parse_error("Duplicated LocalVariableTable attribute "
2374                                 "entry for '%s' in class file %s",
2375                                  cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2376                                  CHECK_(nullHandle));
2377         }
2378       }
2379     }
2380 
2381     // To merge LocalVariableTable and LocalVariableTypeTable
2382     Classfile_LVT_Element* cf_lvtt;
2383     LocalVariableTableElement lvtt_elem;
2384 
2385     for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2386       cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2387       for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2388         copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2389         int index = hash(&lvtt_elem);
2390         LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2391         if (entry == NULL) {
2392           if (_need_verify) {
2393             clear_hashtable(lvt_Hash);
2394             classfile_parse_error("LVTT entry for '%s' in class file %s "
2395                                   "does not match any LVT entry",
2396                                    cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2397                                    CHECK_(nullHandle));
2398           }
2399         } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2400           clear_hashtable(lvt_Hash);
2401           classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2402                                 "entry for '%s' in class file %s",
2403                                  cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2404                                  CHECK_(nullHandle));
2405         } else {
2406           // to add generic signatures into LocalVariableTable
2407           entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2408         }
2409       }
2410     }
2411     clear_hashtable(lvt_Hash);
2412   }
2413 
2414   if (parsed_annotations.has_any_annotations())
2415     parsed_annotations.apply_to(m);
2416   *method_annotations = assemble_annotations(loader_data,
2417                                              runtime_visible_annotations,
2418                                              runtime_visible_annotations_length,
2419                                              runtime_invisible_annotations,
2420                                              runtime_invisible_annotations_length,
2421                                              CHECK_(nullHandle));
2422   *method_parameter_annotations = assemble_annotations(loader_data,
2423                                                        runtime_visible_parameter_annotations,
2424                                                        runtime_visible_parameter_annotations_length,
2425                                                        runtime_invisible_parameter_annotations,
2426                                                        runtime_invisible_parameter_annotations_length,
2427                                                        CHECK_(nullHandle));
2428   *method_default_annotations = assemble_annotations(loader_data,
2429                                                      annotation_default,
2430                                                      annotation_default_length,
2431                                                      NULL,
2432                                                      0,
2433                                                      CHECK_(nullHandle));
2434   *method_type_annotations = assemble_annotations(loader_data,
2435                                                   runtime_visible_type_annotations,
2436                                                   runtime_visible_type_annotations_length,
2437                                                   runtime_invisible_type_annotations,
2438                                                   runtime_invisible_type_annotations_length,
2439                                                   CHECK_(nullHandle));
2440 
2441   if (name == vmSymbols::finalize_method_name() &&
2442       signature == vmSymbols::void_method_signature()) {
2443     if (m->is_empty_method()) {
2444       _has_empty_finalizer = true;
2445     } else {
2446       _has_finalizer = true;
2447     }
2448   }
2449   if (name == vmSymbols::object_initializer_name() &&
2450       signature == vmSymbols::void_method_signature() &&
2451       m->is_vanilla_constructor()) {
2452     _has_vanilla_constructor = true;
2453   }
2454 
2455   return m;
2456 }
2457 
2458 
2459 // The promoted_flags parameter is used to pass relevant access_flags
2460 // from the methods back up to the containing klass. These flag values
2461 // are added to klass's access_flags.
2462 
2463 Array<Method*>* ClassFileParser::parse_methods(ClassLoaderData* loader_data,
2464                                                constantPoolHandle cp,
2465                                                bool is_interface,
2466                                                AccessFlags* promoted_flags,
2467                                                bool* has_final_method,
2468                                                Array<AnnotationArray*>** methods_annotations,
2469                                                Array<AnnotationArray*>** methods_parameter_annotations,
2470                                                Array<AnnotationArray*>** methods_default_annotations,
2471                                                Array<AnnotationArray*>** methods_type_annotations,
2472                                                bool* has_default_methods,
2473                                                TRAPS) {
2474   ClassFileStream* cfs = stream();
2475   AnnotationArray* method_annotations = NULL;
2476   AnnotationArray* method_parameter_annotations = NULL;
2477   AnnotationArray* method_default_annotations = NULL;
2478   AnnotationArray* method_type_annotations = NULL;
2479   cfs->guarantee_more(2, CHECK_NULL);  // length
2480   u2 length = cfs->get_u2_fast();
2481   if (length == 0) {
2482     return Universe::the_empty_method_array();
2483   } else {
2484     // FIXME: Handle leaks at later failures.
2485     Array<Method*>* methods = MetadataFactory::new_array<Method*>(loader_data, length, NULL, CHECK_NULL);
2486 
2487     HandleMark hm(THREAD);
2488     for (int index = 0; index < length; index++) {
2489       methodHandle method = parse_method(loader_data,
2490                                          cp, is_interface,
2491                                          promoted_flags,
2492                                          &method_annotations,
2493                                          &method_parameter_annotations,
2494                                          &method_default_annotations,
2495                                          &method_type_annotations,
2496                                          CHECK_NULL);
2497 
2498       if (method->is_final()) {
2499         *has_final_method = true;
2500       }
2501       if (is_interface && !method->is_abstract() && !method->is_static()) {
2502         // default method
2503         *has_default_methods = true;
2504       }
2505       methods->at_put(index, method());
2506 
2507       if (method_annotations != NULL) {
2508         if (*methods_annotations == NULL) {
2509           *methods_annotations =
2510               MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2511         }
2512         (*methods_annotations)->at_put(index, method_annotations);
2513       }
2514 
2515       if (method_parameter_annotations != NULL) {
2516         if (*methods_parameter_annotations == NULL) {
2517           *methods_parameter_annotations =
2518               MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2519         }
2520         (*methods_parameter_annotations)->at_put(index, method_parameter_annotations);
2521       }
2522 
2523       if (method_default_annotations != NULL) {
2524         if (*methods_default_annotations == NULL) {
2525           *methods_default_annotations =
2526               MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2527         }
2528         (*methods_default_annotations)->at_put(index, method_default_annotations);
2529       }
2530 
2531       if (method_type_annotations != NULL) {
2532         if (*methods_type_annotations == NULL) {
2533           *methods_type_annotations =
2534               MetadataFactory::new_array<AnnotationArray*>(loader_data, length, NULL, CHECK_NULL);
2535         }
2536         (*methods_type_annotations)->at_put(index, method_type_annotations);
2537       }
2538     }
2539 
2540     if (_need_verify && length > 1) {
2541       // Check duplicated methods
2542       ResourceMark rm(THREAD);
2543       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2544         THREAD, NameSigHash*, HASH_ROW_SIZE);
2545       initialize_hashtable(names_and_sigs);
2546       bool dup = false;
2547       {
2548         debug_only(No_Safepoint_Verifier nsv;)
2549         for (int i = 0; i < length; i++) {
2550           Method* m = methods->at(i);
2551           // If no duplicates, add name/signature in hashtable names_and_sigs.
2552           if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2553             dup = true;
2554             break;
2555           }
2556         }
2557       }
2558       if (dup) {
2559         classfile_parse_error("Duplicate method name&signature in class file %s",
2560                               CHECK_NULL);
2561       }
2562     }
2563     return methods;
2564   }
2565 }
2566 
2567 
2568 Array<int>* ClassFileParser::sort_methods(ClassLoaderData* loader_data,
2569                                           Array<Method*>* methods,
2570                                           Array<AnnotationArray*>* methods_annotations,
2571                                           Array<AnnotationArray*>* methods_parameter_annotations,
2572                                           Array<AnnotationArray*>* methods_default_annotations,
2573                                           Array<AnnotationArray*>* methods_type_annotations,
2574                                               TRAPS) {
2575   int length = methods->length();
2576   // If JVMTI original method ordering or sharing is enabled we have to
2577   // remember the original class file ordering.
2578   // We temporarily use the vtable_index field in the Method* to store the
2579   // class file index, so we can read in after calling qsort.
2580   // Put the method ordering in the shared archive.
2581   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2582     for (int index = 0; index < length; index++) {
2583       Method* m = methods->at(index);
2584       assert(!m->valid_vtable_index(), "vtable index should not be set");
2585       m->set_vtable_index(index);
2586     }
2587   }
2588   // Sort method array by ascending method name (for faster lookups & vtable construction)
2589   // Note that the ordering is not alphabetical, see Symbol::fast_compare
2590   Method::sort_methods(methods, methods_annotations,
2591                        methods_parameter_annotations,
2592                        methods_default_annotations,
2593                        methods_type_annotations);
2594 
2595   // If JVMTI original method ordering or sharing is enabled construct int
2596   // array remembering the original ordering
2597   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2598     Array<int>* method_ordering = MetadataFactory::new_array<int>(loader_data, length, CHECK_NULL);
2599     for (int index = 0; index < length; index++) {
2600       Method* m = methods->at(index);
2601       int old_index = m->vtable_index();
2602       assert(old_index >= 0 && old_index < length, "invalid method index");
2603       method_ordering->at_put(index, old_index);
2604       m->set_vtable_index(Method::invalid_vtable_index);
2605     }
2606     return method_ordering;
2607   } else {
2608     return Universe::the_empty_int_array();
2609   }
2610 }
2611 
2612 
2613 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, TRAPS) {
2614   ClassFileStream* cfs = stream();
2615   cfs->guarantee_more(2, CHECK);  // sourcefile_index
2616   u2 sourcefile_index = cfs->get_u2_fast();
2617   check_property(
2618     valid_cp_range(sourcefile_index, cp->length()) &&
2619       cp->tag_at(sourcefile_index).is_utf8(),
2620     "Invalid SourceFile attribute at constant pool index %u in class file %s",
2621     sourcefile_index, CHECK);
2622   set_class_sourcefile(cp->symbol_at(sourcefile_index));
2623 }
2624 
2625 
2626 
2627 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2628                                                                        int length, TRAPS) {
2629   ClassFileStream* cfs = stream();
2630   u1* sde_buffer = cfs->get_u1_buffer();
2631   assert(sde_buffer != NULL, "null sde buffer");
2632 
2633   // Don't bother storing it if there is no way to retrieve it
2634   if (JvmtiExport::can_get_source_debug_extension()) {
2635     assert((length+1) > length, "Overflow checking");
2636     u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2637     for (int i = 0; i < length; i++) {
2638       sde[i] = sde_buffer[i];
2639     }
2640     sde[length] = '\0';
2641     set_class_sde_buffer((char*)sde, length);
2642   }
2643   // Got utf8 string, set stream position forward
2644   cfs->skip_u1(length, CHECK);
2645 }
2646 
2647 
2648 // Inner classes can be static, private or protected (classic VM does this)
2649 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2650 
2651 // Return number of classes in the inner classes attribute table
2652 u2 ClassFileParser::parse_classfile_inner_classes_attribute(ClassLoaderData* loader_data,
2653                                                             u1* inner_classes_attribute_start,
2654                                                             bool parsed_enclosingmethod_attribute,
2655                                                             u2 enclosing_method_class_index,
2656                                                             u2 enclosing_method_method_index,
2657                                                             constantPoolHandle cp,
2658                                                             TRAPS) {
2659   ClassFileStream* cfs = stream();
2660   u1* current_mark = cfs->current();
2661   u2 length = 0;
2662   if (inner_classes_attribute_start != NULL) {
2663     cfs->set_current(inner_classes_attribute_start);
2664     cfs->guarantee_more(2, CHECK_0);  // length
2665     length = cfs->get_u2_fast();
2666   }
2667 
2668   // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2669   // method data:
2670   //   [inner_class_info_index,
2671   //    outer_class_info_index,
2672   //    inner_name_index,
2673   //    inner_class_access_flags,
2674   //    ...
2675   //    enclosing_method_class_index,
2676   //    enclosing_method_method_index]
2677   int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2678   // FIXME: Will leak on exceptions.
2679   Array<u2>* inner_classes = MetadataFactory::new_array<u2>(loader_data, size, CHECK_0);
2680   int index = 0;
2681   int cp_size = cp->length();
2682   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
2683   for (int n = 0; n < length; n++) {
2684     // Inner class index
2685     u2 inner_class_info_index = cfs->get_u2_fast();
2686     check_property(
2687       inner_class_info_index == 0 ||
2688         (valid_cp_range(inner_class_info_index, cp_size) &&
2689         is_klass_reference(cp, inner_class_info_index)),
2690       "inner_class_info_index %u has bad constant type in class file %s",
2691       inner_class_info_index, CHECK_0);
2692     // Outer class index
2693     u2 outer_class_info_index = cfs->get_u2_fast();
2694     check_property(
2695       outer_class_info_index == 0 ||
2696         (valid_cp_range(outer_class_info_index, cp_size) &&
2697         is_klass_reference(cp, outer_class_info_index)),
2698       "outer_class_info_index %u has bad constant type in class file %s",
2699       outer_class_info_index, CHECK_0);
2700     // Inner class name
2701     u2 inner_name_index = cfs->get_u2_fast();
2702     check_property(
2703       inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2704         cp->tag_at(inner_name_index).is_utf8()),
2705       "inner_name_index %u has bad constant type in class file %s",
2706       inner_name_index, CHECK_0);
2707     if (_need_verify) {
2708       guarantee_property(inner_class_info_index != outer_class_info_index,
2709                          "Class is both outer and inner class in class file %s", CHECK_0);
2710     }
2711     // Access flags
2712     AccessFlags inner_access_flags;
2713     jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2714     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2715       // Set abstract bit for old class files for backward compatibility
2716       flags |= JVM_ACC_ABSTRACT;
2717     }
2718     verify_legal_class_modifiers(flags, CHECK_0);
2719     inner_access_flags.set_flags(flags);
2720 
2721     inner_classes->at_put(index++, inner_class_info_index);
2722     inner_classes->at_put(index++, outer_class_info_index);
2723     inner_classes->at_put(index++, inner_name_index);
2724     inner_classes->at_put(index++, inner_access_flags.as_short());
2725   }
2726 
2727   // 4347400: make sure there's no duplicate entry in the classes array
2728   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2729     for(int i = 0; i < length * 4; i += 4) {
2730       for(int j = i + 4; j < length * 4; j += 4) {
2731         guarantee_property((inner_classes->at(i)   != inner_classes->at(j) ||
2732                             inner_classes->at(i+1) != inner_classes->at(j+1) ||
2733                             inner_classes->at(i+2) != inner_classes->at(j+2) ||
2734                             inner_classes->at(i+3) != inner_classes->at(j+3)),
2735                             "Duplicate entry in InnerClasses in class file %s",
2736                             CHECK_0);
2737       }
2738     }
2739   }
2740 
2741   // Set EnclosingMethod class and method indexes.
2742   if (parsed_enclosingmethod_attribute) {
2743     inner_classes->at_put(index++, enclosing_method_class_index);
2744     inner_classes->at_put(index++, enclosing_method_method_index);
2745   }
2746   assert(index == size, "wrong size");
2747 
2748   // Update InstanceKlass with inner class info.
2749   set_class_inner_classes(inner_classes);
2750 
2751   // Restore buffer's current position.
2752   cfs->set_current(current_mark);
2753 
2754   return length;
2755 }
2756 
2757 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, TRAPS) {
2758   set_class_synthetic_flag(true);
2759 }
2760 
2761 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, TRAPS) {
2762   ClassFileStream* cfs = stream();
2763   u2 signature_index = cfs->get_u2(CHECK);
2764   check_property(
2765     valid_cp_range(signature_index, cp->length()) &&
2766       cp->tag_at(signature_index).is_utf8(),
2767     "Invalid constant pool index %u in Signature attribute in class file %s",
2768     signature_index, CHECK);
2769   set_class_generic_signature(cp->symbol_at(signature_index));
2770 }
2771 
2772 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(ClassLoaderData* loader_data,
2773                                                                   constantPoolHandle cp,
2774                                                                   u4 attribute_byte_length, TRAPS) {
2775   ClassFileStream* cfs = stream();
2776   u1* current_start = cfs->current();
2777 
2778   cfs->guarantee_more(2, CHECK);  // length
2779   int attribute_array_length = cfs->get_u2_fast();
2780 
2781   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2782                      "Short length on BootstrapMethods in class file %s",
2783                      CHECK);
2784 
2785   // The attribute contains a counted array of counted tuples of shorts,
2786   // represending bootstrap specifiers:
2787   //    length*{bootstrap_method_index, argument_count*{argument_index}}
2788   int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2789   // operand_count = number of shorts in attr, except for leading length
2790 
2791   // The attribute is copied into a short[] array.
2792   // The array begins with a series of short[2] pairs, one for each tuple.
2793   int index_size = (attribute_array_length * 2);
2794 
2795   Array<u2>* operands = MetadataFactory::new_array<u2>(loader_data, index_size + operand_count, CHECK);
2796 
2797   int operand_fill_index = index_size;
2798   int cp_size = cp->length();
2799 
2800   for (int n = 0; n < attribute_array_length; n++) {
2801     // Store a 32-bit offset into the header of the operand array.
2802     ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
2803 
2804     // Read a bootstrap specifier.
2805     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
2806     u2 bootstrap_method_index = cfs->get_u2_fast();
2807     u2 argument_count = cfs->get_u2_fast();
2808     check_property(
2809       valid_cp_range(bootstrap_method_index, cp_size) &&
2810       cp->tag_at(bootstrap_method_index).is_method_handle(),
2811       "bootstrap_method_index %u has bad constant type in class file %s",
2812       bootstrap_method_index,
2813       CHECK);
2814     operands->at_put(operand_fill_index++, bootstrap_method_index);
2815     operands->at_put(operand_fill_index++, argument_count);
2816 
2817     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
2818     for (int j = 0; j < argument_count; j++) {
2819       u2 argument_index = cfs->get_u2_fast();
2820       check_property(
2821         valid_cp_range(argument_index, cp_size) &&
2822         cp->tag_at(argument_index).is_loadable_constant(),
2823         "argument_index %u has bad constant type in class file %s",
2824         argument_index,
2825         CHECK);
2826       operands->at_put(operand_fill_index++, argument_index);
2827     }
2828   }
2829 
2830   assert(operand_fill_index == operands->length(), "exact fill");
2831   assert(ConstantPool::operand_array_length(operands) == attribute_array_length, "correct decode");
2832 
2833   u1* current_end = cfs->current();
2834   guarantee_property(current_end == current_start + attribute_byte_length,
2835                      "Bad length on BootstrapMethods in class file %s",
2836                      CHECK);
2837 
2838   cp->set_operands(operands);
2839 }
2840 
2841 void ClassFileParser::parse_classfile_attributes(ClassLoaderData* loader_data,
2842                                                  constantPoolHandle cp,
2843                                                  ClassFileParser::ClassAnnotationCollector* parsed_annotations,
2844                                                  TRAPS) {
2845   ClassFileStream* cfs = stream();
2846   // Set inner classes attribute to default sentinel
2847   set_class_inner_classes(Universe::the_empty_short_array());
2848   cfs->guarantee_more(2, CHECK);  // attributes_count
2849   u2 attributes_count = cfs->get_u2_fast();
2850   bool parsed_sourcefile_attribute = false;
2851   bool parsed_innerclasses_attribute = false;
2852   bool parsed_enclosingmethod_attribute = false;
2853   bool parsed_bootstrap_methods_attribute = false;
2854   u1* runtime_visible_annotations = NULL;
2855   int runtime_visible_annotations_length = 0;
2856   u1* runtime_invisible_annotations = NULL;
2857   int runtime_invisible_annotations_length = 0;
2858   u1* runtime_visible_type_annotations = NULL;
2859   int runtime_visible_type_annotations_length = 0;
2860   u1* runtime_invisible_type_annotations = NULL;
2861   int runtime_invisible_type_annotations_length = 0;
2862   u1* inner_classes_attribute_start = NULL;
2863   u4  inner_classes_attribute_length = 0;
2864   u2  enclosing_method_class_index = 0;
2865   u2  enclosing_method_method_index = 0;
2866   // Iterate over attributes
2867   while (attributes_count--) {
2868     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
2869     u2 attribute_name_index = cfs->get_u2_fast();
2870     u4 attribute_length = cfs->get_u4_fast();
2871     check_property(
2872       valid_cp_range(attribute_name_index, cp->length()) &&
2873         cp->tag_at(attribute_name_index).is_utf8(),
2874       "Attribute name has bad constant pool index %u in class file %s",
2875       attribute_name_index, CHECK);
2876     Symbol* tag = cp->symbol_at(attribute_name_index);
2877     if (tag == vmSymbols::tag_source_file()) {
2878       // Check for SourceFile tag
2879       if (_need_verify) {
2880         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2881       }
2882       if (parsed_sourcefile_attribute) {
2883         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2884       } else {
2885         parsed_sourcefile_attribute = true;
2886       }
2887       parse_classfile_sourcefile_attribute(cp, CHECK);
2888     } else if (tag == vmSymbols::tag_source_debug_extension()) {
2889       // Check for SourceDebugExtension tag
2890       parse_classfile_source_debug_extension_attribute(cp, (int)attribute_length, CHECK);
2891     } else if (tag == vmSymbols::tag_inner_classes()) {
2892       // Check for InnerClasses tag
2893       if (parsed_innerclasses_attribute) {
2894         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2895       } else {
2896         parsed_innerclasses_attribute = true;
2897       }
2898       inner_classes_attribute_start = cfs->get_u1_buffer();
2899       inner_classes_attribute_length = attribute_length;
2900       cfs->skip_u1(inner_classes_attribute_length, CHECK);
2901     } else if (tag == vmSymbols::tag_synthetic()) {
2902       // Check for Synthetic tag
2903       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2904       if (attribute_length != 0) {
2905         classfile_parse_error(
2906           "Invalid Synthetic classfile attribute length %u in class file %s",
2907           attribute_length, CHECK);
2908       }
2909       parse_classfile_synthetic_attribute(cp, CHECK);
2910     } else if (tag == vmSymbols::tag_deprecated()) {
2911       // Check for Deprecatd tag - 4276120
2912       if (attribute_length != 0) {
2913         classfile_parse_error(
2914           "Invalid Deprecated classfile attribute length %u in class file %s",
2915           attribute_length, CHECK);
2916       }
2917     } else if (_major_version >= JAVA_1_5_VERSION) {
2918       if (tag == vmSymbols::tag_signature()) {
2919         if (attribute_length != 2) {
2920           classfile_parse_error(
2921             "Wrong Signature attribute length %u in class file %s",
2922             attribute_length, CHECK);
2923         }
2924         parse_classfile_signature_attribute(cp, CHECK);
2925       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2926         runtime_visible_annotations_length = attribute_length;
2927         runtime_visible_annotations = cfs->get_u1_buffer();
2928         assert(runtime_visible_annotations != NULL, "null visible annotations");
2929         parse_annotations(loader_data,
2930                           runtime_visible_annotations,
2931                           runtime_visible_annotations_length,
2932                           cp,
2933                           parsed_annotations,
2934                           CHECK);
2935         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2936       } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2937         runtime_invisible_annotations_length = attribute_length;
2938         runtime_invisible_annotations = cfs->get_u1_buffer();
2939         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2940         cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2941       } else if (tag == vmSymbols::tag_enclosing_method()) {
2942         if (parsed_enclosingmethod_attribute) {
2943           classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2944         }   else {
2945           parsed_enclosingmethod_attribute = true;
2946         }
2947         cfs->guarantee_more(4, CHECK);  // class_index, method_index
2948         enclosing_method_class_index  = cfs->get_u2_fast();
2949         enclosing_method_method_index = cfs->get_u2_fast();
2950         if (enclosing_method_class_index == 0) {
2951           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2952         }
2953         // Validate the constant pool indices and types
2954         if (!cp->is_within_bounds(enclosing_method_class_index) ||
2955             !is_klass_reference(cp, enclosing_method_class_index)) {
2956           classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2957         }
2958         if (enclosing_method_method_index != 0 &&
2959             (!cp->is_within_bounds(enclosing_method_method_index) ||
2960              !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
2961           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2962         }
2963       } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2964                  _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2965         if (parsed_bootstrap_methods_attribute)
2966           classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2967         parsed_bootstrap_methods_attribute = true;
2968         parse_classfile_bootstrap_methods_attribute(loader_data, cp, attribute_length, CHECK);
2969       } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
2970         runtime_visible_type_annotations_length = attribute_length;
2971         runtime_visible_type_annotations = cfs->get_u1_buffer();
2972         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2973         // No need for the VM to parse Type annotations
2974         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
2975       } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
2976         runtime_invisible_type_annotations_length = attribute_length;
2977         runtime_invisible_type_annotations = cfs->get_u1_buffer();
2978         assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2979         cfs->skip_u1(runtime_invisible_type_annotations_length, CHECK);
2980       } else {
2981         // Unknown attribute
2982         cfs->skip_u1(attribute_length, CHECK);
2983       }
2984     } else {
2985       // Unknown attribute
2986       cfs->skip_u1(attribute_length, CHECK);
2987     }
2988   }
2989   AnnotationArray* annotations = assemble_annotations(loader_data,
2990                                                       runtime_visible_annotations,
2991                                                       runtime_visible_annotations_length,
2992                                                       runtime_invisible_annotations,
2993                                                       runtime_invisible_annotations_length,
2994                                                       CHECK);
2995   set_class_annotations(annotations);
2996   AnnotationArray* type_annotations = assemble_annotations(loader_data,
2997                                                            runtime_visible_type_annotations,
2998                                                            runtime_visible_type_annotations_length,
2999                                                            runtime_invisible_type_annotations,
3000                                                            runtime_invisible_type_annotations_length,
3001                                                            CHECK);
3002   set_class_type_annotations(type_annotations);
3003 
3004   if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3005     u2 num_of_classes = parse_classfile_inner_classes_attribute(
3006                             loader_data,
3007                             inner_classes_attribute_start,
3008                             parsed_innerclasses_attribute,
3009                             enclosing_method_class_index,
3010                             enclosing_method_method_index,
3011                             cp, CHECK);
3012     if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3013       guarantee_property(
3014         inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3015         "Wrong InnerClasses attribute length in class file %s", CHECK);
3016     }
3017   }
3018 
3019   if (_max_bootstrap_specifier_index >= 0) {
3020     guarantee_property(parsed_bootstrap_methods_attribute,
3021                        "Missing BootstrapMethods attribute in class file %s", CHECK);
3022   }
3023 }
3024 
3025 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
3026   if (_synthetic_flag)
3027     k->set_is_synthetic();
3028   if (_sourcefile != NULL) {
3029     _sourcefile->increment_refcount();
3030     k->set_source_file_name(_sourcefile);
3031   }
3032   if (_generic_signature != NULL) {
3033     _generic_signature->increment_refcount();
3034     k->set_generic_signature(_generic_signature);
3035   }
3036   if (_sde_buffer != NULL) {
3037     k->set_source_debug_extension(_sde_buffer, _sde_length);
3038   }
3039   k->set_inner_classes(_inner_classes);
3040   if (_annotations != NULL) {
3041     k->annotations()->set_class_annotations(_annotations);
3042   }
3043 }
3044 
3045 AnnotationArray* ClassFileParser::assemble_annotations(ClassLoaderData* loader_data,
3046                                                        u1* runtime_visible_annotations,
3047                                                        int runtime_visible_annotations_length,
3048                                                        u1* runtime_invisible_annotations,
3049                                                        int runtime_invisible_annotations_length, TRAPS) {
3050   AnnotationArray* annotations = NULL;
3051   if (runtime_visible_annotations != NULL ||
3052       runtime_invisible_annotations != NULL) {
3053     annotations = MetadataFactory::new_array<u1>(loader_data,
3054                                           runtime_visible_annotations_length +
3055                                           runtime_invisible_annotations_length,
3056                                           CHECK_(annotations));
3057     if (runtime_visible_annotations != NULL) {
3058       for (int i = 0; i < runtime_visible_annotations_length; i++) {
3059         annotations->at_put(i, runtime_visible_annotations[i]);
3060       }
3061     }
3062     if (runtime_invisible_annotations != NULL) {
3063       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3064         int append = runtime_visible_annotations_length+i;
3065         annotations->at_put(append, runtime_invisible_annotations[i]);
3066       }
3067     }
3068   }
3069   return annotations;
3070 }
3071 
3072 
3073 #ifndef PRODUCT
3074 static void parseAndPrintGenericSignatures(
3075     instanceKlassHandle this_klass, TRAPS) {
3076   assert(ParseAllGenericSignatures == true, "Shouldn't call otherwise");
3077   ResourceMark rm;
3078 
3079   if (this_klass->generic_signature() != NULL) {
3080     using namespace generic;
3081     ClassDescriptor* spec = ClassDescriptor::parse_generic_signature(this_klass(), CHECK);
3082 
3083     tty->print_cr("Parsing %s", this_klass->generic_signature()->as_C_string());
3084     spec->print_on(tty);
3085 
3086     for (int i = 0; i < this_klass->methods()->length(); ++i) {
3087       Method* m = this_klass->methods()->at(i);
3088       MethodDescriptor* method_spec = MethodDescriptor::parse_generic_signature(m, spec);
3089       Symbol* sig = m->generic_signature();
3090       if (sig == NULL) {
3091         sig = m->signature();
3092       }
3093       tty->print_cr("Parsing %s", sig->as_C_string());
3094       method_spec->print_on(tty);
3095     }
3096   }
3097 }
3098 #endif // ndef PRODUCT
3099 
3100 
3101 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
3102                                                     ClassLoaderData* loader_data,
3103                                                     Handle protection_domain,
3104                                                     KlassHandle host_klass,
3105                                                     GrowableArray<Handle>* cp_patches,
3106                                                     TempNewSymbol& parsed_name,
3107                                                     bool verify,
3108                                                     TRAPS) {
3109 
3110   // When a retransformable agent is attached, JVMTI caches the
3111   // class bytes that existed before the first retransformation.
3112   // If RedefineClasses() was used before the retransformable
3113   // agent attached, then the cached class bytes may not be the
3114   // original class bytes.
3115   unsigned char *cached_class_file_bytes = NULL;
3116   jint cached_class_file_length;
3117   Handle class_loader(THREAD, loader_data->class_loader());
3118   bool has_default_methods = false;
3119   ResourceMark rm(THREAD);
3120 
3121   ClassFileStream* cfs = stream();
3122   // Timing
3123   assert(THREAD->is_Java_thread(), "must be a JavaThread");
3124   JavaThread* jt = (JavaThread*) THREAD;
3125 
3126   PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
3127                             ClassLoader::perf_class_parse_selftime(),
3128                             NULL,
3129                             jt->get_thread_stat()->perf_recursion_counts_addr(),
3130                             jt->get_thread_stat()->perf_timers_addr(),
3131                             PerfClassTraceTime::PARSE_CLASS);
3132 
3133   init_parsed_class_attributes();
3134 
3135   if (JvmtiExport::should_post_class_file_load_hook()) {
3136     // Get the cached class file bytes (if any) from the class that
3137     // is being redefined or retransformed. We use jvmti_thread_state()
3138     // instead of JvmtiThreadState::state_for(jt) so we don't allocate
3139     // a JvmtiThreadState any earlier than necessary. This will help
3140     // avoid the bug described by 7126851.
3141     JvmtiThreadState *state = jt->jvmti_thread_state();
3142     if (state != NULL) {
3143       KlassHandle *h_class_being_redefined =
3144                      state->get_class_being_redefined();
3145       if (h_class_being_redefined != NULL) {
3146         instanceKlassHandle ikh_class_being_redefined =
3147           instanceKlassHandle(THREAD, (*h_class_being_redefined)());
3148         cached_class_file_bytes =
3149           ikh_class_being_redefined->get_cached_class_file_bytes();
3150         cached_class_file_length =
3151           ikh_class_being_redefined->get_cached_class_file_len();
3152       }
3153     }
3154 
3155     unsigned char* ptr = cfs->buffer();
3156     unsigned char* end_ptr = cfs->buffer() + cfs->length();
3157 
3158     JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain,
3159                                            &ptr, &end_ptr,
3160                                            &cached_class_file_bytes,
3161                                            &cached_class_file_length);
3162 
3163     if (ptr != cfs->buffer()) {
3164       // JVMTI agent has modified class file data.
3165       // Set new class file stream using JVMTI agent modified
3166       // class file data.
3167       cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
3168       set_stream(cfs);
3169     }
3170   }
3171 
3172   _host_klass = host_klass;
3173   _cp_patches = cp_patches;
3174 
3175   instanceKlassHandle nullHandle;
3176 
3177   // Figure out whether we can skip format checking (matching classic VM behavior)
3178   _need_verify = Verifier::should_verify_for(class_loader(), verify);
3179 
3180   // Set the verify flag in stream
3181   cfs->set_verify(_need_verify);
3182 
3183   // Save the class file name for easier error message printing.
3184   _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
3185 
3186   cfs->guarantee_more(8, CHECK_(nullHandle));  // magic, major, minor
3187   // Magic value
3188   u4 magic = cfs->get_u4_fast();
3189   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
3190                      "Incompatible magic value %u in class file %s",
3191                      magic, CHECK_(nullHandle));
3192 
3193   // Version numbers
3194   u2 minor_version = cfs->get_u2_fast();
3195   u2 major_version = cfs->get_u2_fast();
3196 
3197   // Check version numbers - we check this even with verifier off
3198   if (!is_supported_version(major_version, minor_version)) {
3199     if (name == NULL) {
3200       Exceptions::fthrow(
3201         THREAD_AND_LOCATION,
3202         vmSymbols::java_lang_UnsupportedClassVersionError(),
3203         "Unsupported major.minor version %u.%u",
3204         major_version,
3205         minor_version);
3206     } else {
3207       ResourceMark rm(THREAD);
3208       Exceptions::fthrow(
3209         THREAD_AND_LOCATION,
3210         vmSymbols::java_lang_UnsupportedClassVersionError(),
3211         "%s : Unsupported major.minor version %u.%u",
3212         name->as_C_string(),
3213         major_version,
3214         minor_version);
3215     }
3216     return nullHandle;
3217   }
3218 
3219   _major_version = major_version;
3220   _minor_version = minor_version;
3221 
3222 
3223   // Check if verification needs to be relaxed for this class file
3224   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
3225   _relax_verify = Verifier::relax_verify_for(class_loader());
3226 
3227   // Constant pool
3228   constantPoolHandle cp = parse_constant_pool(loader_data, CHECK_(nullHandle));
3229   ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
3230 
3231   int cp_size = cp->length();
3232 
3233   cfs->guarantee_more(8, CHECK_(nullHandle));  // flags, this_class, super_class, infs_len
3234 
3235   // Access flags
3236   AccessFlags access_flags;
3237   jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
3238 
3239   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3240     // Set abstract bit for old class files for backward compatibility
3241     flags |= JVM_ACC_ABSTRACT;
3242   }
3243   verify_legal_class_modifiers(flags, CHECK_(nullHandle));
3244   access_flags.set_flags(flags);
3245 
3246   // This class and superclass
3247   instanceKlassHandle super_klass;
3248   u2 this_class_index = cfs->get_u2_fast();
3249   check_property(
3250     valid_cp_range(this_class_index, cp_size) &&
3251       cp->tag_at(this_class_index).is_unresolved_klass(),
3252     "Invalid this class index %u in constant pool in class file %s",
3253     this_class_index, CHECK_(nullHandle));
3254 
3255   Symbol*  class_name  = cp->unresolved_klass_at(this_class_index);
3256   assert(class_name != NULL, "class_name can't be null");
3257 
3258   // It's important to set parsed_name *before* resolving the super class.
3259   // (it's used for cleanup by the caller if parsing fails)
3260   parsed_name = class_name;
3261   // parsed_name is returned and can be used if there's an error, so add to
3262   // its reference count.  Caller will decrement the refcount.
3263   parsed_name->increment_refcount();
3264 
3265   // Update _class_name which could be null previously to be class_name
3266   _class_name = class_name;
3267 
3268   // Don't need to check whether this class name is legal or not.
3269   // It has been checked when constant pool is parsed.
3270   // However, make sure it is not an array type.
3271   if (_need_verify) {
3272     guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
3273                        "Bad class name in class file %s",
3274                        CHECK_(nullHandle));
3275   }
3276 
3277   Klass* preserve_this_klass;   // for storing result across HandleMark
3278 
3279   // release all handles when parsing is done
3280   { HandleMark hm(THREAD);
3281 
3282     // Checks if name in class file matches requested name
3283     if (name != NULL && class_name != name) {
3284       ResourceMark rm(THREAD);
3285       Exceptions::fthrow(
3286         THREAD_AND_LOCATION,
3287         vmSymbols::java_lang_NoClassDefFoundError(),
3288         "%s (wrong name: %s)",
3289         name->as_C_string(),
3290         class_name->as_C_string()
3291       );
3292       return nullHandle;
3293     }
3294 
3295     if (TraceClassLoadingPreorder) {
3296       tty->print("[Loading %s", name->as_klass_external_name());
3297       if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
3298       tty->print_cr("]");
3299     }
3300 
3301     u2 super_class_index = cfs->get_u2_fast();
3302     if (super_class_index == 0) {
3303       check_property(class_name == vmSymbols::java_lang_Object(),
3304                      "Invalid superclass index %u in class file %s",
3305                      super_class_index,
3306                      CHECK_(nullHandle));
3307     } else {
3308       check_property(valid_cp_range(super_class_index, cp_size) &&
3309                      is_klass_reference(cp, super_class_index),
3310                      "Invalid superclass index %u in class file %s",
3311                      super_class_index,
3312                      CHECK_(nullHandle));
3313       // The class name should be legal because it is checked when parsing constant pool.
3314       // However, make sure it is not an array type.
3315       bool is_array = false;
3316       if (cp->tag_at(super_class_index).is_klass()) {
3317         super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
3318         if (_need_verify)
3319           is_array = super_klass->oop_is_array();
3320       } else if (_need_verify) {
3321         is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3322       }
3323       if (_need_verify) {
3324         guarantee_property(!is_array,
3325                           "Bad superclass name in class file %s", CHECK_(nullHandle));
3326       }
3327     }
3328 
3329     // Interfaces
3330     u2 itfs_len = cfs->get_u2_fast();
3331     Array<Klass*>* local_interfaces;
3332     if (itfs_len == 0) {
3333       local_interfaces = Universe::the_empty_klass_array();
3334     } else {
3335       local_interfaces = parse_interfaces(
3336           cp, itfs_len, loader_data, protection_domain, _class_name,
3337           &has_default_methods, CHECK_(nullHandle));
3338     }
3339 
3340     u2 java_fields_count = 0;
3341     // Fields (offsets are filled in later)
3342     FieldAllocationCount fac;
3343     Array<AnnotationArray*>* fields_annotations = NULL;
3344     Array<AnnotationArray*>* fields_type_annotations = NULL;
3345     Array<u2>* fields = parse_fields(loader_data, class_name, cp, access_flags.is_interface(), &fac, &fields_annotations,
3346                                           &fields_type_annotations,
3347                                           &java_fields_count,
3348                                           CHECK_(nullHandle));
3349     // Methods
3350     bool has_final_method = false;
3351     AccessFlags promoted_flags;
3352     promoted_flags.set_flags(0);
3353 
3354     Array<AnnotationArray*>* methods_annotations = NULL;
3355     Array<AnnotationArray*>* methods_parameter_annotations = NULL;
3356     Array<AnnotationArray*>* methods_default_annotations = NULL;
3357     Array<AnnotationArray*>* methods_type_annotations = NULL;
3358     Array<Method*>* methods = parse_methods(loader_data,
3359                                             cp, access_flags.is_interface(),
3360                                             &promoted_flags,
3361                                             &has_final_method,
3362                                             &methods_annotations,
3363                                             &methods_parameter_annotations,
3364                                             &methods_default_annotations,
3365                                             &methods_type_annotations,
3366                                             &has_default_methods,
3367                                             CHECK_(nullHandle));
3368 
3369     // Additional attributes
3370     ClassAnnotationCollector parsed_annotations;
3371     parse_classfile_attributes(loader_data, cp, &parsed_annotations, CHECK_(nullHandle));
3372 
3373     // Make sure this is the end of class file stream
3374     guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3375 
3376     // We check super class after class file is parsed and format is checked
3377     if (super_class_index > 0 && super_klass.is_null()) {
3378       Symbol*  sk  = cp->klass_name_at(super_class_index);
3379       if (access_flags.is_interface()) {
3380         // Before attempting to resolve the superclass, check for class format
3381         // errors not checked yet.
3382         guarantee_property(sk == vmSymbols::java_lang_Object(),
3383                            "Interfaces must have java.lang.Object as superclass in class file %s",
3384                            CHECK_(nullHandle));
3385       }
3386       Klass* k = SystemDictionary::resolve_super_or_fail(class_name, sk,
3387                                                          class_loader,
3388                                                          protection_domain,
3389                                                          true,
3390                                                          CHECK_(nullHandle));
3391 
3392       KlassHandle kh (THREAD, k);
3393       super_klass = instanceKlassHandle(THREAD, kh());
3394     }
3395     if (super_klass.not_null()) {
3396 
3397       if (super_klass->has_default_methods()) {
3398         has_default_methods = true;
3399       }
3400 
3401       if (super_klass->is_interface()) {
3402         ResourceMark rm(THREAD);
3403         Exceptions::fthrow(
3404           THREAD_AND_LOCATION,
3405           vmSymbols::java_lang_IncompatibleClassChangeError(),
3406           "class %s has interface %s as super class",
3407           class_name->as_klass_external_name(),
3408           super_klass->external_name()
3409         );
3410         return nullHandle;
3411       }
3412       // Make sure super class is not final
3413       if (super_klass->is_final()) {
3414         THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3415       }
3416     }
3417 
3418     // Compute the transitive list of all unique interfaces implemented by this class
3419     Array<Klass*>* transitive_interfaces = compute_transitive_interfaces(loader_data, super_klass, local_interfaces, CHECK_(nullHandle));
3420 
3421     // sort methods
3422     Array<int>* method_ordering = sort_methods(loader_data,
3423                                                methods,
3424                                                methods_annotations,
3425                                                methods_parameter_annotations,
3426                                                methods_default_annotations,
3427                                                methods_type_annotations,
3428                                                CHECK_(nullHandle));
3429 
3430     // promote flags from parse_methods() to the klass' flags
3431     access_flags.add_promoted_flags(promoted_flags.as_int());
3432 
3433     // Size of Java vtable (in words)
3434     int vtable_size = 0;
3435     int itable_size = 0;
3436     int num_miranda_methods = 0;
3437 
3438     GrowableArray<Method*> all_mirandas(20);
3439 
3440     klassVtable::compute_vtable_size_and_num_mirandas(
3441         &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods,
3442         access_flags, class_loader, class_name, local_interfaces,
3443                                                       CHECK_(nullHandle));
3444 
3445     // Size of Java itable (in words)
3446     itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3447 
3448     // get the padding width from the option
3449     // TODO: Ask VM about specific CPU we are running on
3450     int pad_size = ContendedPaddingWidth;
3451 
3452     // Field size and offset computation
3453     int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3454 #ifndef PRODUCT
3455     int orig_nonstatic_field_size = 0;
3456 #endif
3457     int next_static_oop_offset;
3458     int next_static_double_offset;
3459     int next_static_word_offset;
3460     int next_static_short_offset;
3461     int next_static_byte_offset;
3462     int next_static_padded_offset;
3463     int next_nonstatic_oop_offset;
3464     int next_nonstatic_double_offset;
3465     int next_nonstatic_word_offset;
3466     int next_nonstatic_short_offset;
3467     int next_nonstatic_byte_offset;
3468     int next_nonstatic_type_offset;
3469     int first_nonstatic_oop_offset;
3470     int first_nonstatic_field_offset;
3471     int next_nonstatic_field_offset;
3472     int next_nonstatic_padded_offset;
3473 
3474     // Count the contended fields by type.
3475     int static_contended_count = 0;
3476     int nonstatic_contended_count = 0;
3477     FieldAllocationCount fac_contended;
3478     for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3479       FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3480       if (fs.is_contended()) {
3481         fac_contended.count[atype]++;
3482         if (fs.access_flags().is_static()) {
3483           static_contended_count++;
3484         } else {
3485           nonstatic_contended_count++;
3486         }
3487       }
3488     }
3489     int contended_count = static_contended_count + nonstatic_contended_count;
3490 
3491 
3492     // Calculate the starting byte offsets
3493     next_static_oop_offset      = InstanceMirrorKlass::offset_of_static_fields();
3494 
3495     // class is contended, pad before all the fields
3496     if (parsed_annotations.is_contended()) {
3497       next_static_oop_offset += pad_size;
3498     }
3499 
3500     next_static_double_offset   = next_static_oop_offset +
3501                                   ((fac.count[STATIC_OOP] - fac_contended.count[STATIC_OOP]) * heapOopSize);
3502     if ( fac.count[STATIC_DOUBLE] &&
3503          (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3504           Universe::field_type_should_be_aligned(T_LONG)) ) {
3505       next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3506     }
3507 
3508     next_static_word_offset     = next_static_double_offset +
3509                                   ((fac.count[STATIC_DOUBLE] - fac_contended.count[STATIC_DOUBLE]) * BytesPerLong);
3510     next_static_short_offset    = next_static_word_offset +
3511                                   ((fac.count[STATIC_WORD]   - fac_contended.count[STATIC_WORD]) * BytesPerInt);
3512     next_static_byte_offset     = next_static_short_offset +
3513                                   ((fac.count[STATIC_SHORT]  - fac_contended.count[STATIC_SHORT]) * BytesPerShort);
3514     next_static_padded_offset   = next_static_byte_offset +
3515                                   ((fac.count[STATIC_BYTE]   - fac_contended.count[STATIC_BYTE]) * 1);
3516 
3517     first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3518                                    nonstatic_field_size * heapOopSize;
3519 
3520     // class is contended, pad before all the fields
3521     if (parsed_annotations.is_contended()) {
3522       first_nonstatic_field_offset += pad_size;
3523     }
3524 
3525     next_nonstatic_field_offset = first_nonstatic_field_offset;
3526 
3527     unsigned int nonstatic_double_count = fac.count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3528     unsigned int nonstatic_word_count   = fac.count[NONSTATIC_WORD]   - fac_contended.count[NONSTATIC_WORD];
3529     unsigned int nonstatic_short_count  = fac.count[NONSTATIC_SHORT]  - fac_contended.count[NONSTATIC_SHORT];
3530     unsigned int nonstatic_byte_count   = fac.count[NONSTATIC_BYTE]   - fac_contended.count[NONSTATIC_BYTE];
3531     unsigned int nonstatic_oop_count    = fac.count[NONSTATIC_OOP]    - fac_contended.count[NONSTATIC_OOP];
3532 
3533     bool super_has_nonstatic_fields =
3534             (super_klass() != NULL && super_klass->has_nonstatic_fields());
3535     bool has_nonstatic_fields  =  super_has_nonstatic_fields ||
3536             ((nonstatic_double_count + nonstatic_word_count +
3537               nonstatic_short_count + nonstatic_byte_count +
3538               nonstatic_oop_count) != 0);
3539 
3540 
3541     // Prepare list of oops for oop map generation.
3542     int* nonstatic_oop_offsets;
3543     unsigned int* nonstatic_oop_counts;
3544     unsigned int nonstatic_oop_map_count = 0;
3545 
3546     nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3547               THREAD, int, nonstatic_oop_count + 1);
3548     nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
3549               THREAD, unsigned int, nonstatic_oop_count + 1);
3550 
3551     first_nonstatic_oop_offset = 0; // will be set for first oop field
3552 
3553 #ifndef PRODUCT
3554     if( PrintCompactFieldsSavings ) {
3555       next_nonstatic_double_offset = next_nonstatic_field_offset +
3556                                      (nonstatic_oop_count * heapOopSize);
3557       if ( nonstatic_double_count > 0 ) {
3558         next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3559       }
3560       next_nonstatic_word_offset  = next_nonstatic_double_offset +
3561                                     (nonstatic_double_count * BytesPerLong);
3562       next_nonstatic_short_offset = next_nonstatic_word_offset +
3563                                     (nonstatic_word_count * BytesPerInt);
3564       next_nonstatic_byte_offset  = next_nonstatic_short_offset +
3565                                     (nonstatic_short_count * BytesPerShort);
3566       next_nonstatic_type_offset  = align_size_up((next_nonstatic_byte_offset +
3567                                     nonstatic_byte_count ), heapOopSize );
3568       orig_nonstatic_field_size   = nonstatic_field_size +
3569       ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3570     }
3571 #endif
3572     bool compact_fields   = CompactFields;
3573     int  allocation_style = FieldsAllocationStyle;
3574     if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3575       assert(false, "0 <= FieldsAllocationStyle <= 2");
3576       allocation_style = 1; // Optimistic
3577     }
3578 
3579     // The next classes have predefined hard-coded fields offsets
3580     // (see in JavaClasses::compute_hard_coded_offsets()).
3581     // Use default fields allocation order for them.
3582     if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3583         (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3584          class_name == vmSymbols::java_lang_Class() ||
3585          class_name == vmSymbols::java_lang_ClassLoader() ||
3586          class_name == vmSymbols::java_lang_ref_Reference() ||
3587          class_name == vmSymbols::java_lang_ref_SoftReference() ||
3588          class_name == vmSymbols::java_lang_StackTraceElement() ||
3589          class_name == vmSymbols::java_lang_String() ||
3590          class_name == vmSymbols::java_lang_Throwable() ||
3591          class_name == vmSymbols::java_lang_Boolean() ||
3592          class_name == vmSymbols::java_lang_Character() ||
3593          class_name == vmSymbols::java_lang_Float() ||
3594          class_name == vmSymbols::java_lang_Double() ||
3595          class_name == vmSymbols::java_lang_Byte() ||
3596          class_name == vmSymbols::java_lang_Short() ||
3597          class_name == vmSymbols::java_lang_Integer() ||
3598          class_name == vmSymbols::java_lang_Long())) {
3599       allocation_style = 0;     // Allocate oops first
3600       compact_fields   = false; // Don't compact fields
3601     }
3602 
3603     if( allocation_style == 0 ) {
3604       // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3605       next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3606       next_nonstatic_double_offset = next_nonstatic_oop_offset +
3607                                       (nonstatic_oop_count * heapOopSize);
3608     } else if( allocation_style == 1 ) {
3609       // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3610       next_nonstatic_double_offset = next_nonstatic_field_offset;
3611     } else if( allocation_style == 2 ) {
3612       // Fields allocation: oops fields in super and sub classes are together.
3613       if( nonstatic_field_size > 0 && super_klass() != NULL &&
3614           super_klass->nonstatic_oop_map_size() > 0 ) {
3615         int map_count = super_klass->nonstatic_oop_map_count();
3616         OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3617         OopMapBlock* last_map = first_map + map_count - 1;
3618         int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3619         if (next_offset == next_nonstatic_field_offset) {
3620           allocation_style = 0;   // allocate oops first
3621           next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3622           next_nonstatic_double_offset = next_nonstatic_oop_offset +
3623                                          (nonstatic_oop_count * heapOopSize);
3624         }
3625       }
3626       if( allocation_style == 2 ) {
3627         allocation_style = 1;     // allocate oops last
3628         next_nonstatic_double_offset = next_nonstatic_field_offset;
3629       }
3630     } else {
3631       ShouldNotReachHere();
3632     }
3633 
3634     int nonstatic_oop_space_count   = 0;
3635     int nonstatic_word_space_count  = 0;
3636     int nonstatic_short_space_count = 0;
3637     int nonstatic_byte_space_count  = 0;
3638     int nonstatic_oop_space_offset;
3639     int nonstatic_word_space_offset;
3640     int nonstatic_short_space_offset;
3641     int nonstatic_byte_space_offset;
3642 
3643     if( nonstatic_double_count > 0 ) {
3644       int offset = next_nonstatic_double_offset;
3645       next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3646       if( compact_fields && offset != next_nonstatic_double_offset ) {
3647         // Allocate available fields into the gap before double field.
3648         int length = next_nonstatic_double_offset - offset;
3649         assert(length == BytesPerInt, "");
3650         nonstatic_word_space_offset = offset;
3651         if( nonstatic_word_count > 0 ) {
3652           nonstatic_word_count      -= 1;
3653           nonstatic_word_space_count = 1; // Only one will fit
3654           length -= BytesPerInt;
3655           offset += BytesPerInt;
3656         }
3657         nonstatic_short_space_offset = offset;
3658         while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3659           nonstatic_short_count       -= 1;
3660           nonstatic_short_space_count += 1;
3661           length -= BytesPerShort;
3662           offset += BytesPerShort;
3663         }
3664         nonstatic_byte_space_offset = offset;
3665         while( length > 0 && nonstatic_byte_count > 0 ) {
3666           nonstatic_byte_count       -= 1;
3667           nonstatic_byte_space_count += 1;
3668           length -= 1;
3669         }
3670         // Allocate oop field in the gap if there are no other fields for that.
3671         nonstatic_oop_space_offset = offset;
3672         if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3673             allocation_style != 0 ) { // when oop fields not first
3674           nonstatic_oop_count      -= 1;
3675           nonstatic_oop_space_count = 1; // Only one will fit
3676           length -= heapOopSize;
3677           offset += heapOopSize;
3678         }
3679       }
3680     }
3681 
3682     next_nonstatic_word_offset  = next_nonstatic_double_offset +
3683                                   (nonstatic_double_count * BytesPerLong);
3684     next_nonstatic_short_offset = next_nonstatic_word_offset +
3685                                   (nonstatic_word_count * BytesPerInt);
3686     next_nonstatic_byte_offset  = next_nonstatic_short_offset +
3687                                   (nonstatic_short_count * BytesPerShort);
3688     next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3689                                   nonstatic_byte_count;
3690 
3691     // let oops jump before padding with this allocation style
3692     if( allocation_style == 1 ) {
3693       next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3694       if( nonstatic_oop_count > 0 ) {
3695         next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3696       }
3697       next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3698     }
3699 
3700     // Iterate over fields again and compute correct offsets.
3701     // The field allocation type was temporarily stored in the offset slot.
3702     // oop fields are located before non-oop fields (static and non-static).
3703     for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3704 
3705       // skip already laid out fields
3706       if (fs.is_offset_set()) continue;
3707 
3708       // contended fields are handled below
3709       if (fs.is_contended()) continue;
3710 
3711       int real_offset;
3712       FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3713 
3714       // pack the rest of the fields
3715       switch (atype) {
3716         case STATIC_OOP:
3717           real_offset = next_static_oop_offset;
3718           next_static_oop_offset += heapOopSize;
3719           break;
3720         case STATIC_BYTE:
3721           real_offset = next_static_byte_offset;
3722           next_static_byte_offset += 1;
3723           break;
3724         case STATIC_SHORT:
3725           real_offset = next_static_short_offset;
3726           next_static_short_offset += BytesPerShort;
3727           break;
3728         case STATIC_WORD:
3729           real_offset = next_static_word_offset;
3730           next_static_word_offset += BytesPerInt;
3731           break;
3732         case STATIC_DOUBLE:
3733           real_offset = next_static_double_offset;
3734           next_static_double_offset += BytesPerLong;
3735           break;
3736         case NONSTATIC_OOP:
3737           if( nonstatic_oop_space_count > 0 ) {
3738             real_offset = nonstatic_oop_space_offset;
3739             nonstatic_oop_space_offset += heapOopSize;
3740             nonstatic_oop_space_count  -= 1;
3741           } else {
3742             real_offset = next_nonstatic_oop_offset;
3743             next_nonstatic_oop_offset += heapOopSize;
3744           }
3745           // Update oop maps
3746           if( nonstatic_oop_map_count > 0 &&
3747               nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3748               real_offset -
3749               int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3750               heapOopSize ) {
3751             // Extend current oop map
3752             nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3753           } else {
3754             // Create new oop map
3755             nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3756             nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3757             nonstatic_oop_map_count += 1;
3758             if( first_nonstatic_oop_offset == 0 ) { // Undefined
3759               first_nonstatic_oop_offset = real_offset;
3760             }
3761           }
3762           break;
3763         case NONSTATIC_BYTE:
3764           if( nonstatic_byte_space_count > 0 ) {
3765             real_offset = nonstatic_byte_space_offset;
3766             nonstatic_byte_space_offset += 1;
3767             nonstatic_byte_space_count  -= 1;
3768           } else {
3769             real_offset = next_nonstatic_byte_offset;
3770             next_nonstatic_byte_offset += 1;
3771           }
3772           break;
3773         case NONSTATIC_SHORT:
3774           if( nonstatic_short_space_count > 0 ) {
3775             real_offset = nonstatic_short_space_offset;
3776             nonstatic_short_space_offset += BytesPerShort;
3777             nonstatic_short_space_count  -= 1;
3778           } else {
3779             real_offset = next_nonstatic_short_offset;
3780             next_nonstatic_short_offset += BytesPerShort;
3781           }
3782           break;
3783         case NONSTATIC_WORD:
3784           if( nonstatic_word_space_count > 0 ) {
3785             real_offset = nonstatic_word_space_offset;
3786             nonstatic_word_space_offset += BytesPerInt;
3787             nonstatic_word_space_count  -= 1;
3788           } else {
3789             real_offset = next_nonstatic_word_offset;
3790             next_nonstatic_word_offset += BytesPerInt;
3791           }
3792           break;
3793         case NONSTATIC_DOUBLE:
3794           real_offset = next_nonstatic_double_offset;
3795           next_nonstatic_double_offset += BytesPerLong;
3796           break;
3797         default:
3798           ShouldNotReachHere();
3799       }
3800       fs.set_offset(real_offset);
3801     }
3802 
3803 
3804     // Handle the contended cases.
3805     //
3806     // Each contended field should not intersect the cache line with another contended field.
3807     // In the absence of alignment information, we end up with pessimistically separating
3808     // the fields with full-width padding.
3809     //
3810     // Additionally, this should not break alignment for the fields, so we round the alignment up
3811     // for each field.
3812     if (contended_count > 0) {
3813 
3814       // if there is at least one contended field, we need to have pre-padding for them
3815       if (nonstatic_contended_count > 0) {
3816         next_nonstatic_padded_offset += pad_size;
3817       }
3818 
3819       // collect all contended groups
3820       BitMap bm(cp->size());
3821       for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3822         // skip already laid out fields
3823         if (fs.is_offset_set()) continue;
3824 
3825         if (fs.is_contended()) {
3826           bm.set_bit(fs.contended_group());
3827         }
3828       }
3829 
3830       int current_group = -1;
3831       while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3832 
3833         for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3834 
3835           // skip already laid out fields
3836           if (fs.is_offset_set()) continue;
3837 
3838           // skip non-contended fields and fields from different group
3839           if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3840 
3841           // handle statics below
3842           if (fs.access_flags().is_static()) continue;
3843 
3844           int real_offset;
3845           FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3846 
3847           switch (atype) {
3848             case NONSTATIC_BYTE:
3849               next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
3850               real_offset = next_nonstatic_padded_offset;
3851               next_nonstatic_padded_offset += 1;
3852               break;
3853 
3854             case NONSTATIC_SHORT:
3855               next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
3856               real_offset = next_nonstatic_padded_offset;
3857               next_nonstatic_padded_offset += BytesPerShort;
3858               break;
3859 
3860             case NONSTATIC_WORD:
3861               next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
3862               real_offset = next_nonstatic_padded_offset;
3863               next_nonstatic_padded_offset += BytesPerInt;
3864               break;
3865 
3866             case NONSTATIC_DOUBLE:
3867               next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
3868               real_offset = next_nonstatic_padded_offset;
3869               next_nonstatic_padded_offset += BytesPerLong;
3870               break;
3871 
3872             case NONSTATIC_OOP:
3873               next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
3874               real_offset = next_nonstatic_padded_offset;
3875               next_nonstatic_padded_offset += heapOopSize;
3876 
3877               // Create new oop map
3878               nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3879               nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3880               nonstatic_oop_map_count += 1;
3881               if( first_nonstatic_oop_offset == 0 ) { // Undefined
3882                 first_nonstatic_oop_offset = real_offset;
3883               }
3884               break;
3885 
3886             default:
3887               ShouldNotReachHere();
3888           }
3889 
3890           if (fs.contended_group() == 0) {
3891             // Contended group defines the equivalence class over the fields:
3892             // the fields within the same contended group are not inter-padded.
3893             // The only exception is default group, which does not incur the
3894             // equivalence, and so requires intra-padding.
3895             next_nonstatic_padded_offset += pad_size;
3896           }
3897 
3898           fs.set_offset(real_offset);
3899         } // for
3900 
3901         // Start laying out the next group.
3902         // Note that this will effectively pad the last group in the back;
3903         // this is expected to alleviate memory contention effects for
3904         // subclass fields and/or adjacent object.
3905         // If this was the default group, the padding is already in place.
3906         if (current_group != 0) {
3907           next_nonstatic_padded_offset += pad_size;
3908         }
3909       }
3910 
3911       // handle static fields
3912 
3913       // if there is at least one contended field, we need to have pre-padding for them
3914       if (static_contended_count > 0) {
3915         next_static_padded_offset += pad_size;
3916       }
3917 
3918       current_group = -1;
3919       while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3920 
3921         for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3922 
3923           // skip already laid out fields
3924           if (fs.is_offset_set()) continue;
3925 
3926           // skip non-contended fields and fields from different group
3927           if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3928 
3929           // non-statics already handled above
3930           if (!fs.access_flags().is_static()) continue;
3931 
3932           int real_offset;
3933           FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3934 
3935           switch (atype) {
3936 
3937             case STATIC_BYTE:
3938               next_static_padded_offset = align_size_up(next_static_padded_offset, 1);
3939               real_offset = next_static_padded_offset;
3940               next_static_padded_offset += 1;
3941               break;
3942 
3943             case STATIC_SHORT:
3944               next_static_padded_offset = align_size_up(next_static_padded_offset, BytesPerShort);
3945               real_offset = next_static_padded_offset;
3946               next_static_padded_offset += BytesPerShort;
3947               break;
3948 
3949             case STATIC_WORD:
3950               next_static_padded_offset = align_size_up(next_static_padded_offset, BytesPerInt);
3951               real_offset = next_static_padded_offset;
3952               next_static_padded_offset += BytesPerInt;
3953               break;
3954 
3955             case STATIC_DOUBLE:
3956               next_static_padded_offset = align_size_up(next_static_padded_offset, BytesPerLong);
3957               real_offset = next_static_padded_offset;
3958               next_static_padded_offset += BytesPerLong;
3959               break;
3960 
3961             case STATIC_OOP:
3962               next_static_padded_offset = align_size_up(next_static_padded_offset, heapOopSize);
3963               real_offset = next_static_padded_offset;
3964               next_static_padded_offset += heapOopSize;
3965               break;
3966 
3967             default:
3968               ShouldNotReachHere();
3969           }
3970 
3971           if (fs.contended_group() == 0) {
3972             // Contended group defines the equivalence class over the fields:
3973             // the fields within the same contended group are not inter-padded.
3974             // The only exception is default group, which does not incur the
3975             // equivalence, and so requires intra-padding.
3976             next_static_padded_offset += pad_size;
3977           }
3978 
3979           fs.set_offset(real_offset);
3980         } // for
3981 
3982         // Start laying out the next group.
3983         // Note that this will effectively pad the last group in the back;
3984         // this is expected to alleviate memory contention effects for
3985         // subclass fields and/or adjacent object.
3986         // If this was the default group, the padding is already in place.
3987         if (current_group != 0) {
3988           next_static_padded_offset += pad_size;
3989         }
3990 
3991       }
3992 
3993     } // handle contended
3994 
3995     // Size of instances
3996     int instance_size;
3997 
3998     int notaligned_offset = next_nonstatic_padded_offset;
3999 
4000     // Entire class is contended, pad in the back.
4001     // This helps to alleviate memory contention effects for subclass fields
4002     // and/or adjacent object.
4003     if (parsed_annotations.is_contended()) {
4004       notaligned_offset += pad_size;
4005       next_static_padded_offset += pad_size;
4006     }
4007 
4008     int next_static_type_offset     = align_size_up(next_static_padded_offset, wordSize);
4009     int static_field_size           = (next_static_type_offset -
4010                                   InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4011 
4012     next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
4013     nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
4014                                    - first_nonstatic_field_offset)/heapOopSize);
4015 
4016     next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
4017     instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
4018 
4019     assert(instance_size == align_object_size(align_size_up(
4020                 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize + ((parsed_annotations.is_contended()) ? pad_size : 0)),
4021             wordSize) / wordSize), "consistent layout helper value");
4022 
4023     // Number of non-static oop map blocks allocated at end of klass.
4024     const unsigned int total_oop_map_count =
4025       compute_oop_map_count(super_klass, nonstatic_oop_map_count,
4026                             first_nonstatic_oop_offset);
4027 
4028     // Compute reference type
4029     ReferenceType rt;
4030     if (super_klass() == NULL) {
4031       rt = REF_NONE;
4032     } else {
4033       rt = super_klass->reference_type();
4034     }
4035 
4036     // We can now create the basic Klass* for this klass
4037     int total_oop_map_size2 =
4038       InstanceKlass::nonstatic_oop_map_size(total_oop_map_count);
4039 
4040     Klass* ik = InstanceKlass::allocate_instance_klass(loader_data,
4041                                                        vtable_size,
4042                                                        itable_size,
4043                                                        static_field_size,
4044                                                        total_oop_map_size2,
4045                                                        rt,
4046                                                        access_flags,
4047                                                        name,
4048                                                        super_klass(),
4049                                                        host_klass,
4050                                                        CHECK_(nullHandle));
4051 
4052     // Add all classes to our internal class loader list here,
4053     // including classes in the bootstrap (NULL) class loader.
4054     loader_data->add_class(ik);
4055 
4056     instanceKlassHandle this_klass (THREAD, ik);
4057 
4058     assert(this_klass->static_field_size() == static_field_size, "sanity");
4059     assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
4060            "sanity");
4061 
4062     // Fill in information already parsed
4063     this_klass->set_should_verify_class(verify);
4064     jint lh = Klass::instance_layout_helper(instance_size, false);
4065     this_klass->set_layout_helper(lh);
4066     assert(this_klass->oop_is_instance(), "layout is correct");
4067     assert(this_klass->size_helper() == instance_size, "correct size_helper");
4068     // Not yet: supers are done below to support the new subtype-checking fields
4069     //this_klass->set_super(super_klass());
4070     this_klass->set_class_loader_data(loader_data);
4071     this_klass->set_nonstatic_field_size(nonstatic_field_size);
4072     this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
4073     this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
4074     cp->set_pool_holder(this_klass());
4075     error_handler.set_in_error(false);   // turn off error handler for cp
4076     this_klass->set_constants(cp());
4077     this_klass->set_local_interfaces(local_interfaces);
4078     this_klass->set_fields(fields, java_fields_count);
4079     this_klass->set_methods(methods);
4080     if (has_final_method) {
4081       this_klass->set_has_final_method();
4082     }
4083     this_klass->set_method_ordering(method_ordering);
4084     // The InstanceKlass::_methods_jmethod_ids cache and the
4085     // InstanceKlass::_methods_cached_itable_indices cache are
4086     // both managed on the assumption that the initial cache
4087     // size is equal to the number of methods in the class. If
4088     // that changes, then InstanceKlass::idnum_can_increment()
4089     // has to be changed accordingly.
4090     this_klass->set_initial_method_idnum(methods->length());
4091     this_klass->set_name(cp->klass_name_at(this_class_index));
4092     if (is_anonymous())  // I am well known to myself
4093       cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
4094 
4095     // Allocate an annotation type if needed.
4096     if (fields_annotations != NULL ||
4097         methods_annotations != NULL ||
4098         methods_parameter_annotations != NULL ||
4099         methods_default_annotations != NULL ||
4100         fields_type_annotations != NULL ||
4101         methods_type_annotations != NULL) {
4102       Annotations* anno = Annotations::allocate(loader_data,
4103                             fields_annotations, methods_annotations,
4104                             methods_parameter_annotations,
4105                             methods_default_annotations, CHECK_(nullHandle));
4106       this_klass->set_annotations(anno);
4107     } else {
4108       this_klass->set_annotations(NULL);
4109     }
4110 
4111     if (fields_type_annotations != NULL ||
4112         methods_type_annotations != NULL) {
4113       assert(this_klass->annotations() != NULL, "annotations should have been allocated");
4114       Annotations* anno = Annotations::allocate(loader_data,
4115                                                 fields_type_annotations,
4116                                                 methods_type_annotations,
4117                                                 NULL,
4118                                                 NULL, CHECK_(nullHandle));
4119       this_klass->annotations()->set_type_annotations(anno);
4120     }
4121 
4122     this_klass->set_minor_version(minor_version);
4123     this_klass->set_major_version(major_version);
4124     this_klass->set_has_default_methods(has_default_methods);
4125 
4126     // Set up Method*::intrinsic_id as soon as we know the names of methods.
4127     // (We used to do this lazily, but now we query it in Rewriter,
4128     // which is eagerly done for every method, so we might as well do it now,
4129     // when everything is fresh in memory.)
4130     if (Method::klass_id_for_intrinsics(this_klass()) != vmSymbols::NO_SID) {
4131       for (int j = 0; j < methods->length(); j++) {
4132         methods->at(j)->init_intrinsic_id();
4133       }
4134     }
4135 
4136     if (cached_class_file_bytes != NULL) {
4137       // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
4138       this_klass->set_cached_class_file(cached_class_file_bytes,
4139                                         cached_class_file_length);
4140     }
4141 
4142     // Fill in field values obtained by parse_classfile_attributes
4143     if (parsed_annotations.has_any_annotations())
4144       parsed_annotations.apply_to(this_klass);
4145 
4146     // Create annotations
4147     if (_annotations != NULL && this_klass->annotations() == NULL) {
4148       Annotations* anno = Annotations::allocate(loader_data, CHECK_NULL);
4149       this_klass->set_annotations(anno);
4150     }
4151     apply_parsed_class_attributes(this_klass);
4152 
4153     // Create type annotations
4154     if (_type_annotations != NULL) {
4155       if (this_klass->annotations() == NULL) {
4156         Annotations* anno = Annotations::allocate(loader_data, CHECK_NULL);
4157         this_klass->set_annotations(anno);
4158       }
4159       if (this_klass->annotations()->type_annotations() == NULL) {
4160         Annotations* anno = Annotations::allocate(loader_data, CHECK_NULL);
4161         this_klass->annotations()->set_type_annotations(anno);
4162       }
4163       this_klass->annotations()->type_annotations()->set_class_annotations(_type_annotations);
4164     }
4165 
4166     // Miranda methods
4167     if ((num_miranda_methods > 0) ||
4168         // if this class introduced new miranda methods or
4169         (super_klass.not_null() && (super_klass->has_miranda_methods()))
4170         // super class exists and this class inherited miranda methods
4171         ) {
4172       this_klass->set_has_miranda_methods(); // then set a flag
4173     }
4174 
4175     this_klass->set_transitive_interfaces(transitive_interfaces);
4176 
4177     // Fill in information needed to compute superclasses.
4178     this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
4179 
4180     // Initialize itable offset tables
4181     klassItable::setup_itable_offset_table(this_klass);
4182 
4183     // Compute transitive closure of interfaces this class implements
4184     // Do final class setup
4185     fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
4186 
4187     // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
4188     set_precomputed_flags(this_klass);
4189 
4190     // reinitialize modifiers, using the InnerClasses attribute
4191     int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
4192     this_klass->set_modifier_flags(computed_modifiers);
4193 
4194     // check if this class can access its super class
4195     check_super_class_access(this_klass, CHECK_(nullHandle));
4196 
4197     // check if this class can access its superinterfaces
4198     check_super_interface_access(this_klass, CHECK_(nullHandle));
4199 
4200     // check if this class overrides any final method
4201     check_final_method_override(this_klass, CHECK_(nullHandle));
4202 
4203     // check that if this class is an interface then it doesn't have static methods
4204     if (this_klass->is_interface()) {
4205       /* An interface in a JAVA 8 classfile can be static */
4206       if (_major_version < JAVA_8_VERSION) {
4207         check_illegal_static_method(this_klass, CHECK_(nullHandle));
4208       }
4209     }
4210 
4211 
4212 #ifdef ASSERT
4213     if (ParseAllGenericSignatures) {
4214       parseAndPrintGenericSignatures(this_klass, CHECK_(nullHandle));
4215     }
4216 #endif
4217 
4218     // Generate any default methods - default methods are interface methods
4219     // that have a default implementation.  This is new with Lambda project.
4220     if (has_default_methods && !access_flags.is_interface() &&
4221         local_interfaces->length() > 0) {
4222       DefaultMethods::generate_default_methods(
4223           this_klass(), &all_mirandas, CHECK_(nullHandle));
4224     }
4225 
4226     // Allocate mirror and initialize static fields
4227     java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle));
4228 
4229     // Allocate a simple java object for locking during class initialization.
4230     // This needs to be a java object because it can be held across a java call.
4231     typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_NULL);
4232     this_klass->set_init_lock(r);
4233 
4234     // TODO: Move these oops to the mirror
4235     this_klass->set_protection_domain(protection_domain());
4236 
4237     // Update the loader_data graph.
4238     record_defined_class_dependencies(this_klass, CHECK_NULL);
4239 
4240     ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
4241                                              false /* not shared class */);
4242 
4243     if (TraceClassLoading) {
4244       ResourceMark rm;
4245       // print in a single call to reduce interleaving of output
4246       if (cfs->source() != NULL) {
4247         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4248                    cfs->source());
4249       } else if (class_loader.is_null()) {
4250         if (THREAD->is_Java_thread()) {
4251           Klass* caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
4252           tty->print("[Loaded %s by instance of %s]\n",
4253                      this_klass->external_name(),
4254                      InstanceKlass::cast(caller)->external_name());
4255         } else {
4256           tty->print("[Loaded %s]\n", this_klass->external_name());
4257         }
4258       } else {
4259         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
4260                    InstanceKlass::cast(class_loader->klass())->external_name());
4261       }
4262     }
4263 
4264     if (TraceClassResolution) {
4265       ResourceMark rm;
4266       // print out the superclass.
4267       const char * from = this_klass()->external_name();
4268       if (this_klass->java_super() != NULL) {
4269         tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name());
4270       }
4271       // print out each of the interface classes referred to by this class.
4272       Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4273       if (local_interfaces != NULL) {
4274         int length = local_interfaces->length();
4275         for (int i = 0; i < length; i++) {
4276           Klass* k = local_interfaces->at(i);
4277           InstanceKlass* to_class = InstanceKlass::cast(k);
4278           const char * to = to_class->external_name();
4279           tty->print("RESOLVE %s %s (interface)\n", from, to);
4280         }
4281       }
4282     }
4283 
4284 #ifndef PRODUCT
4285     if( PrintCompactFieldsSavings ) {
4286       ResourceMark rm;
4287       if( nonstatic_field_size < orig_nonstatic_field_size ) {
4288         tty->print("[Saved %d of %d bytes in %s]\n",
4289                  (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
4290                  orig_nonstatic_field_size*heapOopSize,
4291                  this_klass->external_name());
4292       } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
4293         tty->print("[Wasted %d over %d bytes in %s]\n",
4294                  (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
4295                  orig_nonstatic_field_size*heapOopSize,
4296                  this_klass->external_name());
4297       }
4298     }
4299 #endif
4300 
4301 #ifndef PRODUCT
4302     if (PrintFieldLayout) {
4303       print_field_layout(name,
4304             fields,
4305             cp,
4306             instance_size,
4307             first_nonstatic_field_offset,
4308             next_nonstatic_field_offset,
4309             next_static_type_offset);
4310     }
4311 #endif
4312 
4313     // preserve result across HandleMark
4314     preserve_this_klass = this_klass();
4315   }
4316 
4317   // Create new handle outside HandleMark (might be needed for
4318   // Extended Class Redefinition)
4319   instanceKlassHandle this_klass (THREAD, preserve_this_klass);
4320   debug_only(this_klass->verify();)
4321 
4322   return this_klass;
4323 }
4324 
4325 void ClassFileParser::print_field_layout(Symbol* name,
4326                                          Array<u2>* fields,
4327                                          constantPoolHandle cp,
4328                                          int instance_size,
4329                                          int instance_fields_start,
4330                                          int instance_fields_end,
4331                                          int static_fields_end) {
4332   tty->print("%s: field layout\n", name->as_klass_external_name());
4333   tty->print("  @%3d %s\n", instance_fields_start, "--- instance fields start ---");
4334   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4335     if (!fs.access_flags().is_static()) {
4336       tty->print("  @%3d \"%s\" %s\n",
4337           fs.offset(),
4338           fs.name()->as_klass_external_name(),
4339           fs.signature()->as_klass_external_name());
4340     }
4341   }
4342   tty->print("  @%3d %s\n", instance_fields_end, "--- instance fields end ---");
4343   tty->print("  @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
4344   tty->print("  @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
4345   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
4346     if (fs.access_flags().is_static()) {
4347       tty->print("  @%3d \"%s\" %s\n",
4348           fs.offset(),
4349           fs.name()->as_klass_external_name(),
4350           fs.signature()->as_klass_external_name());
4351     }
4352   }
4353   tty->print("  @%3d %s\n", static_fields_end, "--- static fields end ---");
4354   tty->print("\n");
4355 }
4356 
4357 unsigned int
4358 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
4359                                        unsigned int nonstatic_oop_map_count,
4360                                        int first_nonstatic_oop_offset) {
4361   unsigned int map_count =
4362     super.is_null() ? 0 : super->nonstatic_oop_map_count();
4363   if (nonstatic_oop_map_count > 0) {
4364     // We have oops to add to map
4365     if (map_count == 0) {
4366       map_count = nonstatic_oop_map_count;
4367     } else {
4368       // Check whether we should add a new map block or whether the last one can
4369       // be extended
4370       OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
4371       OopMapBlock* const last_map = first_map + map_count - 1;
4372 
4373       int next_offset = last_map->offset() + last_map->count() * heapOopSize;
4374       if (next_offset == first_nonstatic_oop_offset) {
4375         // There is no gap bettwen superklass's last oop field and first
4376         // local oop field, merge maps.
4377         nonstatic_oop_map_count -= 1;
4378       } else {
4379         // Superklass didn't end with a oop field, add extra maps
4380         assert(next_offset < first_nonstatic_oop_offset, "just checking");
4381       }
4382       map_count += nonstatic_oop_map_count;
4383     }
4384   }
4385   return map_count;
4386 }
4387 
4388 
4389 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
4390                                     unsigned int nonstatic_oop_map_count,
4391                                     int* nonstatic_oop_offsets,
4392                                     unsigned int* nonstatic_oop_counts) {
4393   OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4394   const InstanceKlass* const super = k->superklass();
4395   const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4396   if (super_count > 0) {
4397     // Copy maps from superklass
4398     OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4399     for (unsigned int i = 0; i < super_count; ++i) {
4400       *this_oop_map++ = *super_oop_map++;
4401     }
4402   }
4403 
4404   if (nonstatic_oop_map_count > 0) {
4405     if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4406       // The counts differ because there is no gap between superklass's last oop
4407       // field and the first local oop field.  Extend the last oop map copied
4408       // from the superklass instead of creating new one.
4409       nonstatic_oop_map_count--;
4410       nonstatic_oop_offsets++;
4411       this_oop_map--;
4412       this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4413       this_oop_map++;
4414     }
4415 
4416     // Add new map blocks, fill them
4417     while (nonstatic_oop_map_count-- > 0) {
4418       this_oop_map->set_offset(*nonstatic_oop_offsets++);
4419       this_oop_map->set_count(*nonstatic_oop_counts++);
4420       this_oop_map++;
4421     }
4422     assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4423            this_oop_map, "sanity");
4424   }
4425 }
4426 
4427 
4428 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
4429   Klass* super = k->super();
4430 
4431   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4432   // in which case we don't have to register objects as finalizable
4433   if (!_has_empty_finalizer) {
4434     if (_has_finalizer ||
4435         (super != NULL && super->has_finalizer())) {
4436       k->set_has_finalizer();
4437     }
4438   }
4439 
4440 #ifdef ASSERT
4441   bool f = false;
4442   Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
4443                                  vmSymbols::void_method_signature());
4444   if (m != NULL && !m->is_empty_method()) {
4445     f = true;
4446   }
4447   assert(f == k->has_finalizer(), "inconsistent has_finalizer");
4448 #endif
4449 
4450   // Check if this klass supports the java.lang.Cloneable interface
4451   if (SystemDictionary::Cloneable_klass_loaded()) {
4452     if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4453       k->set_is_cloneable();
4454     }
4455   }
4456 
4457   // Check if this klass has a vanilla default constructor
4458   if (super == NULL) {
4459     // java.lang.Object has empty default constructor
4460     k->set_has_vanilla_constructor();
4461   } else {
4462     if (super->has_vanilla_constructor() &&
4463         _has_vanilla_constructor) {
4464       k->set_has_vanilla_constructor();
4465     }
4466 #ifdef ASSERT
4467     bool v = false;
4468     if (super->has_vanilla_constructor()) {
4469       Method* constructor = k->find_method(vmSymbols::object_initializer_name(
4470 ), vmSymbols::void_method_signature());
4471       if (constructor != NULL && constructor->is_vanilla_constructor()) {
4472         v = true;
4473       }
4474     }
4475     assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4476 #endif
4477   }
4478 
4479   // If it cannot be fast-path allocated, set a bit in the layout helper.
4480   // See documentation of InstanceKlass::can_be_fastpath_allocated().
4481   assert(k->size_helper() > 0, "layout_helper is initialized");
4482   if ((!RegisterFinalizersAtInit && k->has_finalizer())
4483       || k->is_abstract() || k->is_interface()
4484       || (k->name() == vmSymbols::java_lang_Class() && k->class_loader() == NULL)
4485       || k->size_helper() >= FastAllocateSizeLimit) {
4486     // Forbid fast-path allocation.
4487     jint lh = Klass::instance_layout_helper(k->size_helper(), true);
4488     k->set_layout_helper(lh);
4489   }
4490 }
4491 
4492 // Attach super classes and interface classes to class loader data
4493 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
4494   ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
4495   if (defining_loader_data->is_the_null_class_loader_data()) {
4496       // Dependencies to null class loader data are implicit.
4497       return;
4498   } else {
4499     // add super class dependency
4500     Klass* super = defined_klass->super();
4501     if (super != NULL) {
4502       defining_loader_data->record_dependency(super, CHECK);
4503     }
4504 
4505     // add super interface dependencies
4506     Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
4507     if (local_interfaces != NULL) {
4508       int length = local_interfaces->length();
4509       for (int i = 0; i < length; i++) {
4510         defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4511       }
4512     }
4513   }
4514 }
4515 
4516 // utility method for appending and array with check for duplicates
4517 
4518 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
4519   // iterate over new interfaces
4520   for (int i = 0; i < ifs->length(); i++) {
4521     Klass* e = ifs->at(i);
4522     assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4523     // add new interface
4524     result->append_if_missing(e);
4525   }
4526 }
4527 
4528 
4529 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(ClassLoaderData* loader_data, instanceKlassHandle super, Array<Klass*>* local_ifs, TRAPS) {
4530   // Compute maximum size for transitive interfaces
4531   int max_transitive_size = 0;
4532   int super_size = 0;
4533   // Add superclass transitive interfaces size
4534   if (super.not_null()) {
4535     super_size = super->transitive_interfaces()->length();
4536     max_transitive_size += super_size;
4537   }
4538   // Add local interfaces' super interfaces
4539   int local_size = local_ifs->length();
4540   for (int i = 0; i < local_size; i++) {
4541     Klass* l = local_ifs->at(i);
4542     max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4543   }
4544   // Finally add local interfaces
4545   max_transitive_size += local_size;
4546   // Construct array
4547   if (max_transitive_size == 0) {
4548     // no interfaces, use canonicalized array
4549     return Universe::the_empty_klass_array();
4550   } else if (max_transitive_size == super_size) {
4551     // no new local interfaces added, share superklass' transitive interface array
4552     return super->transitive_interfaces();
4553   } else if (max_transitive_size == local_size) {
4554     // only local interfaces added, share local interface array
4555     return local_ifs;
4556   } else {
4557     ResourceMark rm;
4558     GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
4559 
4560     // Copy down from superclass
4561     if (super.not_null()) {
4562       append_interfaces(result, super->transitive_interfaces());
4563     }
4564 
4565     // Copy down from local interfaces' superinterfaces
4566     for (int i = 0; i < local_ifs->length(); i++) {
4567       Klass* l = local_ifs->at(i);
4568       append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4569     }
4570     // Finally add local interfaces
4571     append_interfaces(result, local_ifs);
4572 
4573     // length will be less than the max_transitive_size if duplicates were removed
4574     int length = result->length();
4575     assert(length <= max_transitive_size, "just checking");
4576     Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4577     for (int i = 0; i < length; i++) {
4578       Klass* e = result->at(i);
4579         assert(e != NULL, "just checking");
4580       new_result->at_put(i, e);
4581     }
4582     return new_result;
4583   }
4584 }
4585 
4586 
4587 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
4588   Klass* super = this_klass->super();
4589   if ((super != NULL) &&
4590       (!Reflection::verify_class_access(this_klass(), super, false))) {
4591     ResourceMark rm(THREAD);
4592     Exceptions::fthrow(
4593       THREAD_AND_LOCATION,
4594       vmSymbols::java_lang_IllegalAccessError(),
4595       "class %s cannot access its superclass %s",
4596       this_klass->external_name(),
4597       InstanceKlass::cast(super)->external_name()
4598     );
4599     return;
4600   }
4601 }
4602 
4603 
4604 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
4605   Array<Klass*>* local_interfaces = this_klass->local_interfaces();
4606   int lng = local_interfaces->length();
4607   for (int i = lng - 1; i >= 0; i--) {
4608     Klass* k = local_interfaces->at(i);
4609     assert (k != NULL && k->is_interface(), "invalid interface");
4610     if (!Reflection::verify_class_access(this_klass(), k, false)) {
4611       ResourceMark rm(THREAD);
4612       Exceptions::fthrow(
4613         THREAD_AND_LOCATION,
4614         vmSymbols::java_lang_IllegalAccessError(),
4615         "class %s cannot access its superinterface %s",
4616         this_klass->external_name(),
4617         InstanceKlass::cast(k)->external_name()
4618       );
4619       return;
4620     }
4621   }
4622 }
4623 
4624 
4625 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
4626   Array<Method*>* methods = this_klass->methods();
4627   int num_methods = methods->length();
4628 
4629   // go thru each method and check if it overrides a final method
4630   for (int index = 0; index < num_methods; index++) {
4631     Method* m = methods->at(index);
4632 
4633     // skip private, static and <init> methods
4634     if ((!m->is_private()) &&
4635         (!m->is_static()) &&
4636         (m->name() != vmSymbols::object_initializer_name())) {
4637 
4638       Symbol* name = m->name();
4639       Symbol* signature = m->signature();
4640       Klass* k = this_klass->super();
4641       Method* super_m = NULL;
4642       while (k != NULL) {
4643         // skip supers that don't have final methods.
4644         if (k->has_final_method()) {
4645           // lookup a matching method in the super class hierarchy
4646           super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4647           if (super_m == NULL) {
4648             break; // didn't find any match; get out
4649           }
4650 
4651           if (super_m->is_final() &&
4652               // matching method in super is final
4653               (Reflection::verify_field_access(this_klass(),
4654                                                super_m->method_holder(),
4655                                                super_m->method_holder(),
4656                                                super_m->access_flags(), false))
4657             // this class can access super final method and therefore override
4658             ) {
4659             ResourceMark rm(THREAD);
4660             Exceptions::fthrow(
4661               THREAD_AND_LOCATION,
4662               vmSymbols::java_lang_VerifyError(),
4663               "class %s overrides final method %s.%s",
4664               this_klass->external_name(),
4665               name->as_C_string(),
4666               signature->as_C_string()
4667             );
4668             return;
4669           }
4670 
4671           // continue to look from super_m's holder's super.
4672           k = super_m->method_holder()->super();
4673           continue;
4674         }
4675 
4676         k = k->super();
4677       }
4678     }
4679   }
4680 }
4681 
4682 
4683 // assumes that this_klass is an interface
4684 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
4685   assert(this_klass->is_interface(), "not an interface");
4686   Array<Method*>* methods = this_klass->methods();
4687   int num_methods = methods->length();
4688 
4689   for (int index = 0; index < num_methods; index++) {
4690     Method* m = methods->at(index);
4691     // if m is static and not the init method, throw a verify error
4692     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4693       ResourceMark rm(THREAD);
4694       Exceptions::fthrow(
4695         THREAD_AND_LOCATION,
4696         vmSymbols::java_lang_VerifyError(),
4697         "Illegal static method %s in interface %s",
4698         m->name()->as_C_string(),
4699         this_klass->external_name()
4700       );
4701       return;
4702     }
4703   }
4704 }
4705 
4706 // utility methods for format checking
4707 
4708 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
4709   if (!_need_verify) { return; }
4710 
4711   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
4712   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
4713   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
4714   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
4715   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
4716   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4717   const bool major_gte_15  = _major_version >= JAVA_1_5_VERSION;
4718 
4719   if ((is_abstract && is_final) ||
4720       (is_interface && !is_abstract) ||
4721       (is_interface && major_gte_15 && (is_super || is_enum)) ||
4722       (!is_interface && major_gte_15 && is_annotation)) {
4723     ResourceMark rm(THREAD);
4724     Exceptions::fthrow(
4725       THREAD_AND_LOCATION,
4726       vmSymbols::java_lang_ClassFormatError(),
4727       "Illegal class modifiers in class %s: 0x%X",
4728       _class_name->as_C_string(), flags
4729     );
4730     return;
4731   }
4732 }
4733 
4734 bool ClassFileParser::has_illegal_visibility(jint flags) {
4735   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4736   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4737   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4738 
4739   return ((is_public && is_protected) ||
4740           (is_public && is_private) ||
4741           (is_protected && is_private));
4742 }
4743 
4744 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
4745   u2 max_version =
4746     JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
4747     (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
4748   return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4749          (major <= max_version) &&
4750          ((major != max_version) ||
4751           (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4752 }
4753 
4754 void ClassFileParser::verify_legal_field_modifiers(
4755     jint flags, bool is_interface, TRAPS) {
4756   if (!_need_verify) { return; }
4757 
4758   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4759   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4760   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4761   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
4762   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
4763   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
4764   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4765   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
4766   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4767 
4768   bool is_illegal = false;
4769 
4770   if (is_interface) {
4771     if (!is_public || !is_static || !is_final || is_private ||
4772         is_protected || is_volatile || is_transient ||
4773         (major_gte_15 && is_enum)) {
4774       is_illegal = true;
4775     }
4776   } else { // not interface
4777     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4778       is_illegal = true;
4779     }
4780   }
4781 
4782   if (is_illegal) {
4783     ResourceMark rm(THREAD);
4784     Exceptions::fthrow(
4785       THREAD_AND_LOCATION,
4786       vmSymbols::java_lang_ClassFormatError(),
4787       "Illegal field modifiers in class %s: 0x%X",
4788       _class_name->as_C_string(), flags);
4789     return;
4790   }
4791 }
4792 
4793 void ClassFileParser::verify_legal_method_modifiers(
4794     jint flags, bool is_interface, Symbol* name, TRAPS) {
4795   if (!_need_verify) { return; }
4796 
4797   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
4798   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
4799   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
4800   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
4801   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
4802   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
4803   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
4804   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
4805   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4806   const bool is_protected    = (flags & JVM_ACC_PROTECTED)    != 0;
4807   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
4808   const bool major_gte_8     = _major_version >= JAVA_8_VERSION;
4809   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
4810 
4811   bool is_illegal = false;
4812 
4813   if (is_interface) {
4814     if (major_gte_8) {
4815       // Class file version is JAVA_8_VERSION or later Methods of
4816       // interfaces may set any of the flags except ACC_PROTECTED,
4817       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4818       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4819       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4820           (is_native || is_protected || is_final || is_synchronized) ||
4821           // If a specific method of a class or interface has its
4822           // ACC_ABSTRACT flag set, it must not have any of its
4823           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4824           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
4825           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4826           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4827           (is_abstract && (is_private || is_static || is_strict))) {
4828         is_illegal = true;
4829       }
4830     } else if (major_gte_15) {
4831       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4832       if (!is_public || is_static || is_final || is_synchronized ||
4833           is_native || !is_abstract || is_strict) {
4834         is_illegal = true;
4835       }
4836     } else {
4837       // Class file version is pre-JAVA_1_5_VERSION
4838       if (!is_public || is_static || is_final || is_native || !is_abstract) {
4839         is_illegal = true;
4840       }
4841     }
4842   } else { // not interface
4843     if (is_initializer) {
4844       if (is_static || is_final || is_synchronized || is_native ||
4845           is_abstract || (major_gte_15 && is_bridge)) {
4846         is_illegal = true;
4847       }
4848     } else { // not initializer
4849       if (is_abstract) {
4850         if ((is_final || is_native || is_private || is_static ||
4851             (major_gte_15 && (is_synchronized || is_strict)))) {
4852           is_illegal = true;
4853         }
4854       }
4855       if (has_illegal_visibility(flags)) {
4856         is_illegal = true;
4857       }
4858     }
4859   }
4860 
4861   if (is_illegal) {
4862     ResourceMark rm(THREAD);
4863     Exceptions::fthrow(
4864       THREAD_AND_LOCATION,
4865       vmSymbols::java_lang_ClassFormatError(),
4866       "Method %s in class %s has illegal modifiers: 0x%X",
4867       name->as_C_string(), _class_name->as_C_string(), flags);
4868     return;
4869   }
4870 }
4871 
4872 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4873   assert(_need_verify, "only called when _need_verify is true");
4874   int i = 0;
4875   int count = length >> 2;
4876   for (int k=0; k<count; k++) {
4877     unsigned char b0 = buffer[i];
4878     unsigned char b1 = buffer[i+1];
4879     unsigned char b2 = buffer[i+2];
4880     unsigned char b3 = buffer[i+3];
4881     // For an unsigned char v,
4882     // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4883     // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4884     unsigned char res = b0 | b0 - 1 |
4885                         b1 | b1 - 1 |
4886                         b2 | b2 - 1 |
4887                         b3 | b3 - 1;
4888     if (res >= 128) break;
4889     i += 4;
4890   }
4891   for(; i < length; i++) {
4892     unsigned short c;
4893     // no embedded zeros
4894     guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4895     if(buffer[i] < 128) {
4896       continue;
4897     }
4898     if ((i + 5) < length) { // see if it's legal supplementary character
4899       if (UTF8::is_supplementary_character(&buffer[i])) {
4900         c = UTF8::get_supplementary_character(&buffer[i]);
4901         i += 5;
4902         continue;
4903       }
4904     }
4905     switch (buffer[i] >> 4) {
4906       default: break;
4907       case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4908         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4909       case 0xC: case 0xD:  // 110xxxxx  10xxxxxx
4910         c = (buffer[i] & 0x1F) << 6;
4911         i++;
4912         if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4913           c += buffer[i] & 0x3F;
4914           if (_major_version <= 47 || c == 0 || c >= 0x80) {
4915             // for classes with major > 47, c must a null or a character in its shortest form
4916             break;
4917           }
4918         }
4919         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4920       case 0xE:  // 1110xxxx 10xxxxxx 10xxxxxx
4921         c = (buffer[i] & 0xF) << 12;
4922         i += 2;
4923         if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4924           c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4925           if (_major_version <= 47 || c >= 0x800) {
4926             // for classes with major > 47, c must be in its shortest form
4927             break;
4928           }
4929         }
4930         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4931     }  // end of switch
4932   } // end of for
4933 }
4934 
4935 // Checks if name is a legal class name.
4936 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4937   if (!_need_verify || _relax_verify) { return; }
4938 
4939   char buf[fixed_buffer_size];
4940   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4941   unsigned int length = name->utf8_length();
4942   bool legal = false;
4943 
4944   if (length > 0) {
4945     char* p;
4946     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4947       p = skip_over_field_signature(bytes, false, length, CHECK);
4948       legal = (p != NULL) && ((p - bytes) == (int)length);
4949     } else if (_major_version < JAVA_1_5_VERSION) {
4950       if (bytes[0] != '<') {
4951         p = skip_over_field_name(bytes, true, length);
4952         legal = (p != NULL) && ((p - bytes) == (int)length);
4953       }
4954     } else {
4955       // 4900761: relax the constraints based on JSR202 spec
4956       // Class names may be drawn from the entire Unicode character set.
4957       // Identifiers between '/' must be unqualified names.
4958       // The utf8 string has been verified when parsing cpool entries.
4959       legal = verify_unqualified_name(bytes, length, LegalClass);
4960     }
4961   }
4962   if (!legal) {
4963     ResourceMark rm(THREAD);
4964     Exceptions::fthrow(
4965       THREAD_AND_LOCATION,
4966       vmSymbols::java_lang_ClassFormatError(),
4967       "Illegal class name \"%s\" in class file %s", bytes,
4968       _class_name->as_C_string()
4969     );
4970     return;
4971   }
4972 }
4973 
4974 // Checks if name is a legal field name.
4975 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4976   if (!_need_verify || _relax_verify) { return; }
4977 
4978   char buf[fixed_buffer_size];
4979   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4980   unsigned int length = name->utf8_length();
4981   bool legal = false;
4982 
4983   if (length > 0) {
4984     if (_major_version < JAVA_1_5_VERSION) {
4985       if (bytes[0] != '<') {
4986         char* p = skip_over_field_name(bytes, false, length);
4987         legal = (p != NULL) && ((p - bytes) == (int)length);
4988       }
4989     } else {
4990       // 4881221: relax the constraints based on JSR202 spec
4991       legal = verify_unqualified_name(bytes, length, LegalField);
4992     }
4993   }
4994 
4995   if (!legal) {
4996     ResourceMark rm(THREAD);
4997     Exceptions::fthrow(
4998       THREAD_AND_LOCATION,
4999       vmSymbols::java_lang_ClassFormatError(),
5000       "Illegal field name \"%s\" in class %s", bytes,
5001       _class_name->as_C_string()
5002     );
5003     return;
5004   }
5005 }
5006 
5007 // Checks if name is a legal method name.
5008 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
5009   if (!_need_verify || _relax_verify) { return; }
5010 
5011   assert(name != NULL, "method name is null");
5012   char buf[fixed_buffer_size];
5013   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5014   unsigned int length = name->utf8_length();
5015   bool legal = false;
5016 
5017   if (length > 0) {
5018     if (bytes[0] == '<') {
5019       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5020         legal = true;
5021       }
5022     } else if (_major_version < JAVA_1_5_VERSION) {
5023       char* p;
5024       p = skip_over_field_name(bytes, false, length);
5025       legal = (p != NULL) && ((p - bytes) == (int)length);
5026     } else {
5027       // 4881221: relax the constraints based on JSR202 spec
5028       legal = verify_unqualified_name(bytes, length, LegalMethod);
5029     }
5030   }
5031 
5032   if (!legal) {
5033     ResourceMark rm(THREAD);
5034     Exceptions::fthrow(
5035       THREAD_AND_LOCATION,
5036       vmSymbols::java_lang_ClassFormatError(),
5037       "Illegal method name \"%s\" in class %s", bytes,
5038       _class_name->as_C_string()
5039     );
5040     return;
5041   }
5042 }
5043 
5044 
5045 // Checks if signature is a legal field signature.
5046 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
5047   if (!_need_verify) { return; }
5048 
5049   char buf[fixed_buffer_size];
5050   char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5051   unsigned int length = signature->utf8_length();
5052   char* p = skip_over_field_signature(bytes, false, length, CHECK);
5053 
5054   if (p == NULL || (p - bytes) != (int)length) {
5055     throwIllegalSignature("Field", name, signature, CHECK);
5056   }
5057 }
5058 
5059 // Checks if signature is a legal method signature.
5060 // Returns number of parameters
5061 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
5062   if (!_need_verify) {
5063     // make sure caller's args_size will be less than 0 even for non-static
5064     // method so it will be recomputed in compute_size_of_parameters().
5065     return -2;
5066   }
5067 
5068   unsigned int args_size = 0;
5069   char buf[fixed_buffer_size];
5070   char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5071   unsigned int length = signature->utf8_length();
5072   char* nextp;
5073 
5074   // The first character must be a '('
5075   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5076     length--;
5077     // Skip over legal field signatures
5078     nextp = skip_over_field_signature(p, false, length, CHECK_0);
5079     while ((length > 0) && (nextp != NULL)) {
5080       args_size++;
5081       if (p[0] == 'J' || p[0] == 'D') {
5082         args_size++;
5083       }
5084       length -= nextp - p;
5085       p = nextp;
5086       nextp = skip_over_field_signature(p, false, length, CHECK_0);
5087     }
5088     // The first non-signature thing better be a ')'
5089     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5090       length--;
5091       if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5092         // All internal methods must return void
5093         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5094           return args_size;
5095         }
5096       } else {
5097         // Now we better just have a return value
5098         nextp = skip_over_field_signature(p, true, length, CHECK_0);
5099         if (nextp && ((int)length == (nextp - p))) {
5100           return args_size;
5101         }
5102       }
5103     }
5104   }
5105   // Report error
5106   throwIllegalSignature("Method", name, signature, CHECK_0);
5107   return 0;
5108 }
5109 
5110 
5111 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
5112 // Method names also may not contain the characters '<' or '>', unless <init>
5113 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
5114 // method.  Because these names have been checked as special cases before
5115 // calling this method in verify_legal_method_name.
5116 bool ClassFileParser::verify_unqualified_name(
5117     char* name, unsigned int length, int type) {
5118   jchar ch;
5119 
5120   for (char* p = name; p != name + length; ) {
5121     ch = *p;
5122     if (ch < 128) {
5123       p++;
5124       if (ch == '.' || ch == ';' || ch == '[' ) {
5125         return false;   // do not permit '.', ';', or '['
5126       }
5127       if (type != LegalClass && ch == '/') {
5128         return false;   // do not permit '/' unless it's class name
5129       }
5130       if (type == LegalMethod && (ch == '<' || ch == '>')) {
5131         return false;   // do not permit '<' or '>' in method names
5132       }
5133     } else {
5134       char* tmp_p = UTF8::next(p, &ch);
5135       p = tmp_p;
5136     }
5137   }
5138   return true;
5139 }
5140 
5141 
5142 // Take pointer to a string. Skip over the longest part of the string that could
5143 // be taken as a fieldname. Allow '/' if slash_ok is true.
5144 // Return a pointer to just past the fieldname.
5145 // Return NULL if no fieldname at all was found, or in the case of slash_ok
5146 // being true, we saw consecutive slashes (meaning we were looking for a
5147 // qualified path but found something that was badly-formed).
5148 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
5149   char* p;
5150   jchar ch;
5151   jboolean last_is_slash = false;
5152   jboolean not_first_ch = false;
5153 
5154   for (p = name; p != name + length; not_first_ch = true) {
5155     char* old_p = p;
5156     ch = *p;
5157     if (ch < 128) {
5158       p++;
5159       // quick check for ascii
5160       if ((ch >= 'a' && ch <= 'z') ||
5161           (ch >= 'A' && ch <= 'Z') ||
5162           (ch == '_' || ch == '$') ||
5163           (not_first_ch && ch >= '0' && ch <= '9')) {
5164         last_is_slash = false;
5165         continue;
5166       }
5167       if (slash_ok && ch == '/') {
5168         if (last_is_slash) {
5169           return NULL;  // Don't permit consecutive slashes
5170         }
5171         last_is_slash = true;
5172         continue;
5173       }
5174     } else {
5175       jint unicode_ch;
5176       char* tmp_p = UTF8::next_character(p, &unicode_ch);
5177       p = tmp_p;
5178       last_is_slash = false;
5179       // Check if ch is Java identifier start or is Java identifier part
5180       // 4672820: call java.lang.Character methods directly without generating separate tables.
5181       EXCEPTION_MARK;
5182       instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
5183 
5184       // return value
5185       JavaValue result(T_BOOLEAN);
5186       // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
5187       JavaCallArguments args;
5188       args.push_int(unicode_ch);
5189 
5190       // public static boolean isJavaIdentifierStart(char ch);
5191       JavaCalls::call_static(&result,
5192                              klass,
5193                              vmSymbols::isJavaIdentifierStart_name(),
5194                              vmSymbols::int_bool_signature(),
5195                              &args,
5196                              THREAD);
5197 
5198       if (HAS_PENDING_EXCEPTION) {
5199         CLEAR_PENDING_EXCEPTION;
5200         return 0;
5201       }
5202       if (result.get_jboolean()) {
5203         continue;
5204       }
5205 
5206       if (not_first_ch) {
5207         // public static boolean isJavaIdentifierPart(char ch);
5208         JavaCalls::call_static(&result,
5209                                klass,
5210                                vmSymbols::isJavaIdentifierPart_name(),
5211                                vmSymbols::int_bool_signature(),
5212                                &args,
5213                                THREAD);
5214 
5215         if (HAS_PENDING_EXCEPTION) {
5216           CLEAR_PENDING_EXCEPTION;
5217           return 0;
5218         }
5219 
5220         if (result.get_jboolean()) {
5221           continue;
5222         }
5223       }
5224     }
5225     return (not_first_ch) ? old_p : NULL;
5226   }
5227   return (not_first_ch) ? p : NULL;
5228 }
5229 
5230 
5231 // Take pointer to a string. Skip over the longest part of the string that could
5232 // be taken as a field signature. Allow "void" if void_ok.
5233 // Return a pointer to just past the signature.
5234 // Return NULL if no legal signature is found.
5235 char* ClassFileParser::skip_over_field_signature(char* signature,
5236                                                  bool void_ok,
5237                                                  unsigned int length,
5238                                                  TRAPS) {
5239   unsigned int array_dim = 0;
5240   while (length > 0) {
5241     switch (signature[0]) {
5242       case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
5243       case JVM_SIGNATURE_BOOLEAN:
5244       case JVM_SIGNATURE_BYTE:
5245       case JVM_SIGNATURE_CHAR:
5246       case JVM_SIGNATURE_SHORT:
5247       case JVM_SIGNATURE_INT:
5248       case JVM_SIGNATURE_FLOAT:
5249       case JVM_SIGNATURE_LONG:
5250       case JVM_SIGNATURE_DOUBLE:
5251         return signature + 1;
5252       case JVM_SIGNATURE_CLASS: {
5253         if (_major_version < JAVA_1_5_VERSION) {
5254           // Skip over the class name if one is there
5255           char* p = skip_over_field_name(signature + 1, true, --length);
5256 
5257           // The next character better be a semicolon
5258           if (p && (p - signature) > 1 && p[0] == ';') {
5259             return p + 1;
5260           }
5261         } else {
5262           // 4900761: For class version > 48, any unicode is allowed in class name.
5263           length--;
5264           signature++;
5265           while (length > 0 && signature[0] != ';') {
5266             if (signature[0] == '.') {
5267               classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
5268             }
5269             length--;
5270             signature++;
5271           }
5272           if (signature[0] == ';') { return signature + 1; }
5273         }
5274 
5275         return NULL;
5276       }
5277       case JVM_SIGNATURE_ARRAY:
5278         array_dim++;
5279         if (array_dim > 255) {
5280           // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
5281           classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
5282         }
5283         // The rest of what's there better be a legal signature
5284         signature++;
5285         length--;
5286         void_ok = false;
5287         break;
5288 
5289       default:
5290         return NULL;
5291     }
5292   }
5293   return NULL;
5294 }